/doc folder of your installation.
1. Open the project and in MPLAB X IDE and select the desired project operation
2. Build the code and program the device. The application initially will not operate in any USB role.
3. Press SW2 on the starter kit. This places the application in a USB Device mode.
4. Connect a USB cable between micro USB connector (J4) on the starter kit and a PC USB host. The application will emulate a USB HID mouse
function. The cursor on the PC will rotate. Pressing SW1 will enable and disable the cursor movements. Exercise device plug-n-play operation
to confirm USB Device operation
5. Now try switching the USB role. Disconnect the USB cable between micro USB connector (J4) on the starter kit and a PC USB host. Press
SW2 on the starter kit.
6. The application now will be in USB Host role. Connect a USB pen drive to the Type-A USB Host connector (J5) on the starter kit. The
application will create a file (file.txt) on the pen drive. The completion of the operation is indicated by LED2 on the starter kit. Disconnect
the pen driver and connect it to a PC to verify the contents of the file.
7. Repeat steps 3 through 6 to exercise the role switching capability.
Volume I: Getting Started With MPLAB Harmony Applications Help USB Demonstrations
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.06 57
Index
A
Applications Help 3
audio_speaker 41
B
Building the Application 10, 17, 19, 20, 23, 24, 26, 29, 30, 32, 33, 34, 35,
39, 40, 42, 43, 44, 45, 47, 48, 49, 50, 54, 55, 56
C
cdc_basic 43
cdc_com_port_dual 10, 54
cdc_com_port_single 16
cdc_msd 44
cdc_msd_basic 19
cdc_serial_emulator 20
cdc_serial_emulator_msd 23
Configuring the Hardware 11, 17, 20, 21, 23, 25, 27, 29, 31, 32, 33, 35,
36, 39, 40, 42, 43, 45, 46, 47, 49, 50, 51, 54, 55, 56
USB Device Demonstration (hid_msd_basic) 32
D
Demonstration Application Configurations 7
Demonstrations 10
USB 10
Device 10
Dual Role 56
H
hid_basic 24
hid_basic_keyboard 45
hid_basic_mouse_usart 47
hid_joystick 26
hid_keyboard 29
hid_mouse 30
hid_msd_basic 32
Host 41
host_msd_device_hid 56
hub_cdc_hid 48
hub_msd 49
I
Introduction 3
M
msd_basic 33, 50
msd_dual 55
msd_fs_spiflash 34
msd_multiple_luns 35
msd_sdcard 38
Multiple USB Controller 54
R
Running the Demonstration 13, 18, 20, 21, 24, 25, 27, 30, 31, 32, 34, 35,
38, 39, 41, 42, 43, 45, 46, 48, 49, 50, 53, 54, 55, 56
USB Device Demonstration (hid_keyboard) 29
USB Device Demonstrations (audio_speaker) 42
USB Device Demonstrations (hid_keyboard) 30
U
USB Demonstrations 3
USB Device Stack Component Memory Requirements 5
USB Device Stack Demonstration Application Program and Data
Memory Requirements 3
USB HID Host Keyboard and Mouse Tests 6
USB MSD Host USB Pen Drive Tests 5
V
vendor 39
Volume I: Getting Started With MPLAB Harmony Libraries and
Applications 2
Index
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.06 58
2000 Microchip Technology Inc. DS39500A
PICmicro® 18C MCU Family
Reference Manual
39500 18C Reference Manual.book Page i Monday, July 10, 2000 6:12 PM
DS39500A-page ii 2000 Microchip Technology Inc.
“All rights reserved. Copyright © 2000, Microchip Technology
Incorporated, USA. Information contained in this publication
regarding device applications and the like is intended through
suggestion only and may be superseded by updates. No representation
or warranty is given and no liability is assumed by
Microchip Technology Incorporated with respect to the accuracy
or use of such information, or infringement of patents or
other intellectual property rights arising from such use or otherwise.
Use of Microchip’s products as critical components in
life support systems is not authorized except with express
written approval by Microchip. No licenses are conveyed,
implicitly or otherwise, under any intellectual property rights.
The Microchip logo and name are registered trademarks of
Microchip Technology Inc. in the U.S.A. and other countries.
All rights reserved. All other trademarks mentioned herein are
the property of their respective companies. No licenses are
conveyed, implicitly or otherwise, under any intellectual property
rights.”
Trademarks
The Microchip name, logo, KEELOQ, PIC, PICMASTER,
PICmicro, PRO MATE, PICSTART, MPLAB, and SEEVAL are
registered trademarks of Microchip Technology Incorporated
in the U.S.A. and other countries.
Total Endurance, In-Circuit Serial Programming (ICSP),
microID, FilterLab are trademarks of Microchip Technology
Incorporated in the U.S.A.
Serialized Quick Term Programming (SQTP) is a service mark
of Microchip Technology Incorporated in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2000, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
39500 18C Reference Manual.book Page ii Monday, July 10, 2000 6:12 PM
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PAGE
COMPANY PROFILE 1-1
SECTION 1. INTRODUCTION 1-1
Introduction ...................................................................................................................................................... 1-2
Manual Objective ............................................................................................................................................. 1-3
Device Structure ............................................................................................................................................... 1-4
Development Support ...................................................................................................................................... 1-6
Device Varieties ............................................................................................................................................... 1-7
Style and Symbol Conventions ...................................................................................................................... 1-12
Related Documents ........................................................................................................................................ 1-14
Related Application Notes .............................................................................................................................. 1-17
Revision History ............................................................................................................................................. 1-18
SECTION 2. OSCILLATOR 2-1
Introduction ...................................................................................................................................................... 2-2
Control Register ............................................................................................................................................... 2-3
Oscillator Configurations .................................................................................................................................. 2-4
Crystal Oscillators/Ceramic Resonators ........................................................................................................... 2-6
External RC Oscillator .................................................................................................................................... 2-15
HS4 ................................................................................................................................................................ 2-18
Switching to Low Power Clock Source ........................................................................................................... 2-19
Effects of Sleep Mode on the On-Chip Oscillator ........................................................................................... 2-23
Effects of Device Reset on the On-Chip Oscillator ......................................................................................... 2-23
Design Tips .................................................................................................................................................... 2-24
Related Application Notes .............................................................................................................................. 2-25
Revision History ............................................................................................................................................. 2-26
SECTION 3. RESET 3-1
Introduction ...................................................................................................................................................... 3-2
Resets and Delay Timers ................................................................................................................................. 3-4
Registers and Status Bit Values ..................................................................................................................... 3-14
Design Tips .................................................................................................................................................... 3-20
Related Application Notes .............................................................................................................................. 3-21
Revision History ............................................................................................................................................. 3-22
SECTION 4. ARCHITECTURE 4-1
Introduction ...................................................................................................................................................... 4-2
Clocking Scheme/Instruction Cycle .................................................................................................................. 4-5
Instruction Flow/Pipelining ............................................................................................................................... 4-6
I/O Descriptions ................................................................................................................................................ 4-7
Design Tips .................................................................................................................................................... 4-14
Related Application Notes .............................................................................................................................. 4-15
Revision History ............................................................................................................................................. 4-16
Table of Contents
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PAGE
SECTION 5. CPU AND ALU 5-1
Introduction ...................................................................................................................................................... 5-2
General Instruction Format .............................................................................................................................. 5-6
Central Processing Unit (CPU) ......................................................................................................................... 5-7
Instruction Clock ............................................................................................................................................... 5-8
Arithmetic Logical Unit (ALU) ........................................................................................................................... 5-9
STATUS Register ........................................................................................................................................... 5-11
Design Tips .................................................................................................................................................... 5-14
Related Application Notes .............................................................................................................................. 5-15
Revision History ............................................................................................................................................. 5-16
SECTION 6. HARDWARE 8X8 MULTIPLIER 6-1
Introduction ...................................................................................................................................................... 6-2
Operation ......................................................................................................................................................... 6-3
Design Tips ...................................................................................................................................................... 6-6
Related Application Notes ................................................................................................................................ 6-7
Revision History ............................................................................................................................................... 6-8
SECTION 7. MEMORY ORGANIZATION 7-1
Introduction ...................................................................................................................................................... 7-2
Program Memory ............................................................................................................................................. 7-3
Program Counter (PC) ..................................................................................................................................... 7-6
Lookup Tables .................................................................................................................................................. 7-9
Stack .............................................................................................................................................................. 7-12
Data Memory Organization ............................................................................................................................ 7-13
Return Address Stack .................................................................................................................................... 7-17
Initialization .................................................................................................................................................... 7-23
Design Tips .................................................................................................................................................... 7-24
Related Application Notes .............................................................................................................................. 7-25
Revision History ............................................................................................................................................. 7-26
SECTION 8. TABLE READ/TABLE WRITE 8-1
Introduction ...................................................................................................................................................... 8-2
Control Registers ............................................................................................................................................. 8-3
Program Memory ............................................................................................................................................. 8-6
Enabling Internal Programming ...................................................................................................................... 8-12
External Program Memory Operation ............................................................................................................. 8-12
Initialization .................................................................................................................................................... 8-13
Design Tips .................................................................................................................................................... 8-14
Related Application Notes .............................................................................................................................. 8-15
Revision History ............................................................................................................................................. 8-16
Table of Contents
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PAGE
SECTION 9. SYSTEM BUS 9-1
Revision History ............................................................................................................................................... 9-2
SECTION 10. INTERRUPTS 10-1
Introduction .................................................................................................................................................... 10-2
Control Registers ........................................................................................................................................... 10-6
Interrupt Handling Operation ........................................................................................................................ 10-19
Initialization .................................................................................................................................................. 10-29
Design Tips .................................................................................................................................................. 10-30
Related Application Notes ............................................................................................................................ 10-31
Revision History ........................................................................................................................................... 10-32
SECTION 11. I/O PORTS 11-1
Introduction .................................................................................................................................................... 11-2
PORTA, TRISA, and the LATA Register ........................................................................................................ 11-8
PORTB, TRISB, and the LATB Register ...................................................................................................... 11-12
PORTC, TRISC, and the LATC Register ..................................................................................................... 11-16
PORTD, LATD, and the TRISD Register ..................................................................................................... 11-19
PORTE, TRISE, and the LATE Register ...................................................................................................... 11-21
PORTF, LATF, and the TRISF Register ....................................................................................................... 11-23
PORTG, LATG, and the TRISG Register ..................................................................................................... 11-25
PORTH, LATH, and the TRISH Register ................................................................................................... 11-27
PORTJ, LATJ, and the TRISJ Register ........................................................................................................ 11-29
PORTK, LATK, and the TRISK Register ...................................................................................................... 11-31
PORTL, LATL, and the TRISL Register ....................................................................................................... 11-33
Functions Multiplexed on I/O Pins ................................................................................................................ 11-35
I/O Programming Considerations ................................................................................................................. 11-37
Initialization .................................................................................................................................................. 11-40
Design Tips .................................................................................................................................................. 11-41
Related Application Notes ............................................................................................................................ 11-43
Revision History ........................................................................................................................................... 11-44
SECTION 12. PARALLEL SLAVE PORT 12-1
Introduction .................................................................................................................................................... 12-2
Control Register ............................................................................................................................................. 12-3
Operation ....................................................................................................................................................... 12-5
Operation in SLEEP Mode ............................................................................................................................. 12-6
Effect of a RESET .......................................................................................................................................... 12-6
PSP Waveforms ............................................................................................................................................. 12-6
Design Tips .................................................................................................................................................... 12-8
Related Application Notes .............................................................................................................................. 12-9
Revision History ........................................................................................................................................... 12-10
Table of Contents
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PAGE
SECTION 13. TIMER0 13-1
Introduction .................................................................................................................................................... 13-2
Control Register ............................................................................................................................................. 13-3
Operation ....................................................................................................................................................... 13-4
Timer0 Interrupt .............................................................................................................................................. 13-5
Using Timer0 with an External Clock ............................................................................................................. 13-6
Timer0 Prescaler ............................................................................................................................................ 13-7
Initialization .................................................................................................................................................... 13-9
Design Tips .................................................................................................................................................. 13-10
Related Application Notes ............................................................................................................................ 13-11
Revision History ........................................................................................................................................... 13-12
SECTION 14. TIMER1 14-1
Introduction .................................................................................................................................................... 14-2
Control Register ............................................................................................................................................. 14-4
Timer1 Operation in Timer Mode ................................................................................................................... 14-5
Timer1 Operation in Synchronized Counter Mode ......................................................................................... 14-5
Timer1 Operation in Asynchronous Counter Mode ........................................................................................ 14-6
Reading and Writing of Timer1 ...................................................................................................................... 14-7
Timer1 Oscillator .......................................................................................................................................... 14-10
Typical Application ....................................................................................................................................... 14-11
Sleep Operation ........................................................................................................................................... 14-12
Resetting Timer1 Using a CCP Trigger Output ............................................................................................ 14-12
Resetting Timer1 Register Pair (TMR1H:TMR1L) ........................................................................................ 14-13
Timer1 Prescaler .......................................................................................................................................... 14-13
Initialization .................................................................................................................................................. 14-14
Design Tips .................................................................................................................................................. 14-16
Related Application Notes ............................................................................................................................ 14-17
Revision History ........................................................................................................................................... 14-18
SECTION 15. TIMER2 15-1
Introduction .................................................................................................................................................... 15-2
Control Register ............................................................................................................................................. 15-3
Timer Clock Source ........................................................................................................................................ 15-4
Timer (TMR2) and Period (PR2) Registers .................................................................................................... 15-4
TMR2 Match Output ....................................................................................................................................... 15-4
Clearing the Timer2 Prescaler and Postscaler ............................................................................................... 15-4
Sleep Operation ............................................................................................................................................. 15-4
Initialization .................................................................................................................................................... 15-5
Design Tips .................................................................................................................................................... 15-6
Related Application Notes .............................................................................................................................. 15-7
Revision History ............................................................................................................................................. 15-8
Table of Contents
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PAGE
SECTION 16. TIMER3 16-1
Introduction .................................................................................................................................................... 16-2
Control Registers ........................................................................................................................................... 16-3
Timer3 Operation in Timer Mode ................................................................................................................... 16-4
Timer3 Operation in Synchronized Counter Mode ......................................................................................... 16-4
Timer3 Operation in Asynchronous Counter Mode ........................................................................................ 16-5
Reading and Writing of Timer3 ...................................................................................................................... 16-6
Timer3 using the Timer1 Oscillator ................................................................................................................ 16-9
Timer3 and CCPx Enable ............................................................................................................................ 16-10
Timer3 Prescaler .......................................................................................................................................... 16-10
16-bit Mode Timer Reads/Writes .................................................................................................................. 16-11
Typical Application ....................................................................................................................................... 16-12
Sleep Operation ........................................................................................................................................... 16-13
Timer3 Prescaler .......................................................................................................................................... 16-13
Initialization .................................................................................................................................................. 16-14
Design Tips .................................................................................................................................................. 16-16
Related Application Notes ............................................................................................................................ 16-17
Revision History ........................................................................................................................................... 16-18
SECTION 17. COMPARE/CAPTURE/PWM (CCP) 17-1
Introduction .................................................................................................................................................... 17-2
CCP Control Register ..................................................................................................................................... 17-3
Capture Mode ................................................................................................................................................ 17-4
Compare Mode .............................................................................................................................................. 17-7
PWM Mode .................................................................................................................................................. 17-10
Initialization .................................................................................................................................................. 17-15
Design Tips .................................................................................................................................................. 17-17
Related Application Notes ............................................................................................................................ 17-19
Revision History ........................................................................................................................................... 17-20
SECTION 18. ECCP 18-1
SECTION 19. SYNCHRONOUS SERIAL PORT (SSP) 19-1
Introduction .................................................................................................................................................... 19-2
Control Registers ........................................................................................................................................... 19-4
SPI Mode ....................................................................................................................................................... 19-8
SSP I2C Operation ....................................................................................................................................... 19-18
Initialization .................................................................................................................................................. 19-28
Design Tips .................................................................................................................................................. 19-30
Related Application Notes ............................................................................................................................ 19-31
Revision History ........................................................................................................................................... 19-32
Table of Contents
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PAGE
SECTION 20. MASTER SSP 20-1
Introduction .................................................................................................................................................... 20-2
Control Registers ........................................................................................................................................... 20-4
SPI Mode ....................................................................................................................................................... 20-9
MSSP I2C Operation .................................................................................................................................... 20-18
Design Tips .................................................................................................................................................. 20-58
Related Application Notes ............................................................................................................................ 20-59
Revision History ........................................................................................................................................... 20-60
SECTION 21. ADDRESSABLE USART 21-1
Introduction .................................................................................................................................................... 21-2
Control Registers ........................................................................................................................................... 21-3
USART Baud Rate Generator (BRG) ............................................................................................................. 21-5
USART Asynchronous Mode ......................................................................................................................... 21-9
USART Synchronous Master Mode ............................................................................................................. 21-18
USART Synchronous Slave Mode ............................................................................................................... 21-23
Initialization .................................................................................................................................................. 21-25
Design Tips .................................................................................................................................................. 21-26
Related Application Notes ............................................................................................................................ 21-27
Revision History ........................................................................................................................................... 21-28
SECTION 22. CAN 22-1
Introduction .................................................................................................................................................... 22-2
Control Registers for the CAN Module ........................................................................................................... 22-3
CAN Overview .............................................................................................................................................. 22-28
CAN Bus Features ....................................................................................................................................... 22-32
CAN Module Implementation ....................................................................................................................... 22-33
Frame Types ................................................................................................................................................ 22-37
Modes of Operation ...................................................................................................................................... 22-44
CAN Bus Initialization ................................................................................................................................... 22-48
Message Reception ..................................................................................................................................... 22-49
Transmission ................................................................................................................................................ 22-60
Error Detection ............................................................................................................................................. 22-69
Baud Rate Setting ........................................................................................................................................ 22-71
Interrupts ...................................................................................................................................................... 22-75
Timestamping ............................................................................................................................................... 22-77
CAN Module I/O ........................................................................................................................................... 22-77
Design Tips .................................................................................................................................................. 22-78
Related Application Notes ............................................................................................................................ 22-79
Revision History ........................................................................................................................................... 22-80
Table of Contents
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PAGE
SECTION 23. COMPARATOR VOLTAGE REFERENCE 23-1
Introduction .................................................................................................................................................... 23-2
Control Register ............................................................................................................................................. 23-3
Configuring the Voltage Reference ................................................................................................................ 23-4
Voltage Reference Accuracy/Error ................................................................................................................. 23-5
Operation During Sleep .................................................................................................................................. 23-5
Effects of a Reset ........................................................................................................................................... 23-5
Connection Considerations ............................................................................................................................ 23-6
Initialization .................................................................................................................................................... 23-7
Design Tips .................................................................................................................................................... 23-8
Related Application Notes .............................................................................................................................. 23-9
Revision History ........................................................................................................................................... 23-10
SECTION 24. COMPARATOR 24-1
Introduction .................................................................................................................................................... 24-2
Control Register ............................................................................................................................................. 24-3
Comparator Configuration .............................................................................................................................. 24-4
Comparator Operation ................................................................................................................................... 24-6
Comparator Reference ................................................................................................................................... 24-6
Comparator Response Time .......................................................................................................................... 24-8
Comparator Outputs ....................................................................................................................................... 24-8
Comparator Interrupts .................................................................................................................................... 24-9
Comparator Operation During SLEEP ........................................................................................................... 24-9
Effects of a RESET ........................................................................................................................................ 24-9
Analog Input Connection Considerations ..................................................................................................... 24-10
Initialization .................................................................................................................................................. 24-11
Design Tips .................................................................................................................................................. 24-12
Related Application Notes ............................................................................................................................ 24-13
Revision History ........................................................................................................................................... 24-14
SECTION 25. COMPATIBLE 10-BIT A/D CONVERTER 25-1
Introduction .................................................................................................................................................... 25-2
Control Register ............................................................................................................................................. 25-4
Operation ....................................................................................................................................................... 25-7
A/D Acquisition Requirements ....................................................................................................................... 25-8
Selecting the A/D Conversion Clock ............................................................................................................ 25-10
Configuring Analog Port Pins ....................................................................................................................... 25-11
A/D Conversions .......................................................................................................................................... 25-12
Operation During Sleep ................................................................................................................................ 25-16
Effects of a Reset ......................................................................................................................................... 25-16
A/D Accuracy/Error ...................................................................................................................................... 25-17
Connection Considerations .......................................................................................................................... 25-18
Transfer Function ......................................................................................................................................... 25-18
Initialization .................................................................................................................................................. 25-19
Design Tips .................................................................................................................................................. 25-20
Related Application Notes ............................................................................................................................ 25-21
Revision History ........................................................................................................................................... 25-22
Table of Contents
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PAGE
SECTION 26. 10-BIT A/D CONVERTER 26-1
Introduction .................................................................................................................................................... 26-2
Control Register ............................................................................................................................................. 26-4
Operation ....................................................................................................................................................... 26-7
A/D Acquisition Requirements ....................................................................................................................... 26-8
Selecting the A/D Conversion Clock ............................................................................................................ 26-10
Configuring Analog Port Pins ....................................................................................................................... 26-11
A/D Conversions .......................................................................................................................................... 26-12
Operation During Sleep ................................................................................................................................ 26-16
Effects of a Reset ......................................................................................................................................... 26-16
A/D Accuracy/Error ...................................................................................................................................... 26-17
Connection Considerations .......................................................................................................................... 26-18
Transfer Function ......................................................................................................................................... 26-18
Initialization .................................................................................................................................................. 26-19
Design Tips .................................................................................................................................................. 26-20
Related Application Notes ............................................................................................................................ 26-21
Revision History ........................................................................................................................................... 26-22
SECTION 27. LOW VOLTAGE DETECT 27-1
Introduction .................................................................................................................................................... 27-2
Control Register ............................................................................................................................................. 27-4
Operation ....................................................................................................................................................... 27-5
Operation During Sleep .................................................................................................................................. 27-6
Effects of a Reset ........................................................................................................................................... 27-6
Initialization .................................................................................................................................................... 27-7
Design Tips .................................................................................................................................................... 27-8
Related Application Notes .............................................................................................................................. 27-9
Revision History ........................................................................................................................................... 27-10
SECTION 28. WDT AND SLEEP MODE 28-1
Introduction .................................................................................................................................................... 28-2
Control Register ............................................................................................................................................. 28-3
Watchdog Timer (WDT) Operation ................................................................................................................. 28-4
SLEEP (Power-Down) Mode .......................................................................................................................... 28-5
Initialization .................................................................................................................................................. 28-11
Design Tips .................................................................................................................................................. 28-12
Related Application Notes ............................................................................................................................ 28-13
Revision History ........................................................................................................................................... 28-14
Table of Contents
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PAGE
SECTION 29. DEVICE CONFIGURATION BITS 29-1
Introduction .................................................................................................................................................... 29-2
Configuration Word Bits ................................................................................................................................. 29-3
Program Verification/Code Protection .......................................................................................................... 29-10
ID Locations ................................................................................................................................................. 29-11
Device ID ...................................................................................................................................................... 29-11
Design Tips .................................................................................................................................................. 29-12
Related Application Notes ............................................................................................................................ 29-13
Revision History ........................................................................................................................................... 29-14
SECTION 30. IN-CIRCUIT SERIAL PROGRAMMING™ (ICSP™) 30-1
Introduction .................................................................................................................................................... 30-2
Entering In-Circuit Serial Programming Mode ................................................................................................ 30-3
Application Circuit .......................................................................................................................................... 30-4
Programmer ................................................................................................................................................... 30-6
Programming Environment ............................................................................................................................ 30-6
Other Benefits ................................................................................................................................................ 30-7
Field Programming of PICmicro OTP MCUs .................................................................................................. 30-8
Field Programming of FLASH PICmicros ..................................................................................................... 30-10
Design Tips .................................................................................................................................................. 30-12
Related Application Notes ............................................................................................................................ 30-13
Revision History ........................................................................................................................................... 30-14
SECTION 31. INSTRUCTION SET 31-1
Introduction .................................................................................................................................................... 31-2
Data Memory Map .......................................................................................................................................... 31-3
Instruction Formats ........................................................................................................................................ 31-9
Special Function Registers as Source/Destination ...................................................................................... 31-12
Fast Register Stack ...................................................................................................................................... 31-13
Q Cycle Activity ............................................................................................................................................ 31-13
Instruction Descriptions ................................................................................................................................ 31-14
Design Tips ................................................................................................................................................ 31-136
Related Application Notes .......................................................................................................................... 31-137
Revision History ......................................................................................................................................... 31-138
Table of Contents
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SECTION 32. ELECTRICAL SPECIFICATIONS 32-1
Introduction .................................................................................................................................................... 32-2
Absolute Maximums ....................................................................................................................................... 32-3
Voltage vs Frequency Graph ......................................................................................................................... 32-4
Device Voltage Specifications ........................................................................................................................ 32-6
Device Current Specifications ........................................................................................................................ 32-7
Input Threshold Levels ................................................................................................................................. 32-10
I/O Current Specifications ............................................................................................................................ 32-11
Output Drive Levels ...................................................................................................................................... 32-12
I/O Capacitive Loading ................................................................................................................................. 32-13
Low Voltage Detect (LVD) ............................................................................................................................ 32-14
EPROM/FLASH/Data EEPROM .................................................................................................................. 32-15
Comparators and Voltage Reference ........................................................................................................... 32-16
Timing Parameter Symbology ...................................................................................................................... 32-18
Example External Clock Timing Waveforms and Requirements .................................................................. 32-19
Example Phase Lock Loop (PLL) Timing Waveforms and Requirements ................................................... 32-20
Example Power-up and RESET Timing Waveforms and Requirements ...................................................... 32-22
Example Timer0 and Timer1 Timing Waveforms and Requirements ........................................................... 32-23
Example CCP Timing Waveforms and Requirements ................................................................................. 32-24
Example Parallel Slave Port (PSP) Timing Waveforms and Requirements ................................................. 32-25
Example SSP and Master SSP SPI Mode Timing Waveforms and Requirements ...................................... 32-26
Example SSP I2C Mode Timing Waveforms and Requirements .................................................................. 32-30
Example Master SSP I2C Mode Timing Waveforms and Requirements ...................................................... 32-32
Example USART/SCI Timing Waveforms and Requirements ...................................................................... 32-34
CAN Specifications ...................................................................................................................................... 32-35
Example 8-bit A/D Timing Waveforms and Requirements ........................................................................... 32-36
Example 10-bit A/D Timing Waveforms and Requirements ......................................................................... 32-38
Design Tips .................................................................................................................................................. 32-40
Related Application Notes ............................................................................................................................ 32-41
Revision History ........................................................................................................................................... 32-42
SECTION 33. DEVICE CHARACTERISTICS 33-1
Introduction .................................................................................................................................................... 33-2
Characterization vs. Electrical Specification ................................................................................................... 33-2
DC and AC Characteristics Graphs and Tables ............................................................................................. 33-2
Revision History ........................................................................................................................................... 33-26
Table of Contents
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SECTION 34. DEVELOPMENT TOOLS 34-1
Introduction .................................................................................................................................................... 34-2
The Integrated Development Environment (IDE) ........................................................................................... 34-3
MPLAB® Software Language Support ........................................................................................................... 34-6
MPLAB-SIM Simulator Software .................................................................................................................... 34-8
MPLAB Emulator Hardware Support .............................................................................................................. 34-9
MPLAB High Performance Universal In-Circuit Emulator with MPLAB IDE ................................................... 34-9
MPLAB-ICD In-Circuit Debugger .................................................................................................................... 34-9
MPLAB Programmer Support ...................................................................................................................... 34-10
Supplemental Tools ..................................................................................................................................... 34-11
Development Boards .................................................................................................................................... 34-12
Development Tools for Other Microchip Products ........................................................................................ 34-14
Related Application Notes ............................................................................................................................ 34-15
Revision History ........................................................................................................................................... 34-16
SECTION 35. CODE DEVELOPMENT 35-1
Overview ........................................................................................................................................................ 35-2
Good Practice ................................................................................................................................................ 35-3
Diagnostic Code Techniques ......................................................................................................................... 35-5
Example Scenario and Implementation ......................................................................................................... 35-6
Implications of Using a High Level Language (HLL) ...................................................................................... 35-7
Revision History ............................................................................................................................................. 35-8
SECTION 36. APPENDIX 36-1
Appendix A: I2C Overview............................................................................................................................... 36-1
Appendix B: CAN Overview ......................................................................................................................... 36-12
Appendix C: Module Block Diagrams and Registers..................................................................................... 36-13
Appendix D: Register Definitions .................................................................................................................. 36-14
Appendix E: Migration Tips ........................................................................................................................... 36-15
SECTION 37. GLOSSARY 37-1
Revision History ........................................................................................................................................... 37-14
SOURCE CODE
INDEX
Table of Contents
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DS39500A-page xiv 2000 Microchip Technology Inc.
PAGE
NOTES:
Table of Contents
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2000 Microchip Technology Inc. DS00027U-page xv
The Embedded Control Solutions Company
Since its inception, Microchip Technology has focused
its resources on delivering innovative semiconductor
products to the global embedded control marketplace.
To do this, we have focused our technology,
engineering, manufacturing and marketing resources
on synergistic product lines: PICmicro®
microcontrollers (MCUs), high-endurance Serial
EEPROMs, an expanding product portfolio of analog/
interface products, RFID tags and KEELOQ® security
devices – all aimed at delivering comprehensive,
high-value embedded control solutions to a growing
base of customers.
Inside Microchip Technology you will find:
• An experienced executive team focused on
innovation and committed to listening to our
customers
• A focus on providing high-performance,
cost-effective embedded control solutions
• Fully integrated manufacturing capabilities
• A global network of manufacturing and customer
support facilities
• A unique corporate culture dedicated to
continuous improvement
• Distributor network support worldwide including
certified distribution FAEs
• A Complete Product Solution including:
- RISC OTP, FLASH, EEPROM and ROM
MCUs
- A full family of advanced analog MCUs
- KEELOQ security devices featuring patented
code hopping technology
- Stand-alone analog and interface products
plus microID™ RFID tagging devices
- A complete line of high-endurance Serial
EEPROMs
- World-class, easy-to-use development tools
- An Automotive Products Group to engage
with key automotive accounts and provide
necessary application expertise and
customer service
Business Scope
Microchip Technology Inc. designs, manufactures, and
markets a variety of CMOS semiconductor
components to support the market for cost-effective
embedded control solutions.
Microchip's products feature compact size, integrated
functionality, ease of development and technical
support so essential to timely and cost-effective
product development by our customers.
Company Profile
Chandler, Arizona: Company headquarters near
Phoenix, Arizona; executive offices, R&D and wafer
fabrication occupy this 242,000 square-foot multi-building
campus.
Tempe, Arizona: Microchip’s 200,000 square-foot wafer
fabrication facility provides increased manufacturing
capacity today and for the future.
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DS00027U-page xvi 2000 Microchip Technology Inc.
Market Focus
Microchip targets select markets where our advanced
designs, progressive process technology and
industry-leading product performance enables us to
deliver decidedly superior performance. Our Company
is positioned to provide a complete product solution for
embedded control applications found throughout the
consumer, automotive, telecommunication, office
automation and industrial control markets. Microchip
products are also meeting the unique design
requirements of targeted embedded applications
including internet, safety and security.
Certified Quality Systems
Microchip’s quality systems have been certified to
QS-9000 requirements. Its worldwide headquarters
and wafer fabrication facilities in Chandler and Tempe,
Arizona, received certification on July 23, 1999. The
scope of this certification is the design and
manufacture of RISC-based MCUs, related
non-volatile memory products and microperipheral
devices. The quality systems for Microchip’s product
test facility in Bangkok, Thailand, were QS-9000
certified on February 26, 1999. The scope of this
certification is the design and testing of integrated
circuits. In addition, Microchip’s quality system for the
design and manufacture of development systems is
ISO 9001 certified.
QS-9000 was developed by Chrysler, Ford and
General Motors to establish fundamental quality
systems that provide for continuous improvement,
emphasizing defect prevention and the reduction of
variation and waste in the supply chain. Microchip was
audited by QS-9000 registrar Det Norske Veritas
Certification Inc. of Houston, the same firm which
granted Microchip its ISO 9001 Quality System
certification in 1997. QS-9000 certification recognizes
Microchip’s quality systems conform to the stringent
standards set forth by the automotive industry,
benefiting all customers.
Fully Integrated Manufacturing
Microchip delivers fast turnaround and consistent
quality through total control over all phases of
production. Research and development, design, mask
making, wafer fabrication, and the major part of
assembly and quality assurance testing are conducted
at facilities wholly-owned and operated by Microchip.
Our integrated approach to manufacturing along with
rigorous use of advanced Statistical Process Control
(SPC) and a continuous improvement culture has
resulted in high and consistent yields which have
positioned Microchip as a quality leader in its global
markets. Microchip’s unique approach to SPC provides
customers with excellent pricing, quality, reliability and
on-time delivery.
A Global Network of Plants and Facilities
Microchip is a global competitor providing local
services to the world’s technology centers. The
Company’s design and technology advancement
facilities, and wafer fabrication sites are located in
Chandler and Tempe, Arizona.
The Tempe facility provides an additional 200,000
square feet of manufacturing space that meets the
increased production requirements of a growing
customer base, and provides production capacity
which more than doubles that of Chandler.
Microchip facilities in Bangkok, Thailand, and
Shanghai, China, serve as the foundation of
Microchip’s extensive assembly and test capability
located throughout Asia. The use of multiple
fabrication, assembly and test sites, with more than
640,000-square-feet of facilities worldwide, ensures
Microchip’s ability to meet the increased production
requirements of a fast growing customer base.
Microchip supports its global customer base from direct
sales and engineering offices in Asia, North America,
Europe and Japan. Offices are staffed to meet the high
quality expectations of our customers, and can be
accessed for technical and business support. The
Company also franchises more than 60 distributors and
a network of technical manufacturer’s representatives
serving 24 countries worldwide.
Bangkok, Thailand: Microchip’s 200,000 square-foot
manufacturing facility houses the technology and
assembly/test equipment for high speed testing and
packaging.
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Embedded Control Overview
Unlike “processor” applications such as personal
computers and workstations, the computing or
controlling elements of embedded control applications
are embedded inside the application. The consumer is
only concerned with the very top-level user interface
such as keypads, displays and high-level commands.
Very rarely does an end-user know (or care to know)
the embedded controller inside (unlike the
conscientious PC users, who are intimately familiar not
only with the processor type, but also its clock speed,
DMA capabilities and so on).
It is, however, most vital for designers of embedded
control products to select the most suitable controller
and companion devices. Embedded control products
are found in all market segments: consumer,
commercial, PC peripherals, telecommunications,
automotive and industrial. Most embedded control
products must meet special requirements: cost
effectiveness, low-power, small-footprint and a high
level of system integration.
Typically, most embedded control systems are
designed around an MCU which integrates on-chip
program memory, data memory (RAM) and various
peripheral functions, such as timers and serial
communication. In addition, these systems usually
require complementary Serial EEPROM,
analog/interface devices, display drivers, keypads or
small displays.
Microchip has established itself as a leading supplier of
embedded control solutions. The combination of
high-performance PIC12CXXX, PIC16C5X,
PIC16CXXX, PIC17CXXX and PIC18CXXX MCU
families with Migratable Memory™ technology, along
with non-volatile memory products, provide the basis
for this leadership. By further expanding our product
portfolio to provide precision analog and interface
products, Microchip is committed to continuous
innovation and improvement in design, manufacturing
and technical support to provide the best possible
embedded control solutions to you.
PICmicro MCU Overview and Roadmap
Microchip PICmicro MCUs combine high-performance,
low-cost, and small package size, offering the best
price/performance ratio in the industry. More than one
billion of these devices have shipped to customers
worldwide since 1990. Microchip offers five families of
MCUs to best fit your application needs:
• PIC12CXXX 8-pin 12-bit/14-bit program word
• PIC16C5X 12-bit program word
• PIC16CXXX 14-bit program word
• PIC17CXXX 16-bit program word
• PIC18CXXX enhanced 16-bit program word
All families offer OTP, low-voltage and low-power
options, with a variety of package options. Selected
members are available in ROM, EEPROM or
reprogrammable FLASH versions.
PIC12CXXX: 8-Pin, Family
The PIC12CXXX family packs Microchip’s powerful
RISC-based PICmicro architecture into 8-pin DIP and
SOIC packages. These PIC12CXXX products are
available with either a 12-bit or 14-bit wide instruction
set, a low operating voltage of 2.5V, small package
footprints, interrupt handling, a deeper hardware stack,
multiple channels and EEPROM data memory. All of
these features provide an intelligence level not
previously available in applications because of cost or
size considerations.
PIC16C5X: 12-Bit Architecture Family
The PIC16C5X is the well-established base-line family
that offers the most cost-effective solution. These
PIC16C5X products have a 12-bit wide instruction set
and are currently offered in 14-, 18-, 20- and 28-pin
packages. In the SOIC and SSOP packaging options,
these devices are among the smallest footprint MCUs
in the industry. Low-voltage operation, down to 2.0V for
OTP MCUs, makes this family ideal for battery
operated applications. Additionally, the PIC16HV5XX
can operate up to 15 volts for use directly with a battery.
PIC16CXXX: 14-Bit Architecture Family
With the introduction of new PIC16CXXX family
members, Microchip now provides the industry’s
highest performance Analog-to-Digital Converter
capability at 12-bits for an MCU. The PIC16CXXX
family offers a wide-range of options, from 18- to 68-pin
packages as well as low to high levels of peripheral
integration. This family has a 14-bit wide instruction set,
interrupt handling capability and a deep, 8-level
hardware stack. The PIC16CXXX family provides the
performance and versatility to meet the more
demanding requirements of today’s cost-sensitive
marketplace for mid-range applications.
PIC17CXXX: 16-Bit Architecture Family
The PIC17CXXX family offers the world’s fastest
execution performance of any MCU family in the
industry. The PIC17CXXX family extends the PICmicro
MCU’s high-performance RISC architecture with a
16-bit instruction word, enhanced instruction set and
powerful vectored interrupt handling capabilities. A
powerful array of precise on-chip peripheral features
provides the performance for the most demanding
applications.
PIC18CXXX: 16-Bit Enhanced Architecture Family
The PIC18CXXX is a family of high performance,
CMOS, fully static, 16-bit MCUs with integrated
analog-to-digital (A/D) converter. All PIC18CXXX
MCUs incorporate an advanced RISC architecture.
The PIC18CXXX has enhanced core features, 32
level-deep stack, and multiple internal and external
interrupts sources. The separate instruction and data
busses of the Harvard architecture allow a 16-bit wide
instruction word with the separate 8-bit wide data. The
two-stage instruction pipeline allows all instructions to
execute in a single cycle, except for program branches,
which require two cycles. A total of 77 instructions
(reduced instruction set) are available. Additionally, a
large register set gives some of the architectural
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DS00027U-page xviii 2000 Microchip Technology Inc.
innovations used to achieve a very high performance of
10 MIPS for an MCU. The PIC18CXXX family has
special features to reduce external components, thus
reducing cost, enhancing system reliability and
reducing power consumption. These include
programmable Low Voltage Detect (LVD) and
programmable Brown-Out Detect (BOD).
The Mechatronics Revolution
The nature of the revolution is the momentous shift
from analog/electro-mechanical timing and control to
digital electronics. It is called the Mechatronics
Revolution, and it is being staged in companies
throughout the world, with design engineers right on
the front lines: make it smarter, make it smaller, make it
do more, make it cost less to manufacture – and make
it snappy.
To meet the needs of this growing customer base,
Microchip is rapidly expanding its already broad line of
PICmicro MCUs. The PIC12CXXX family’s size opens
up new possibilities for product design.
PICmicro MCU Naming Convention
The PICmicro architecture offers users a wider range of
cost/performance options than any MCU family. In
order to identify the families, the following naming
conventions have been applied to the PICmicro MCUs:
TABLE 1: PICmicro MCU NAMING CONVENTION*
*Please check with your local Microchip distributor, sales representative or sales office for the latest product information.
Family Architectural Features Name Technology
PIC18CXXX
8-bit HighPerformance
MCU Family
• 10 MIPS @ 40 MHz
• 4x PLL clock
• 16-bit wide instruction set
• C compiler efficient
instruction set
• Internal/external vectored
interrupts
PIC18CXX2
PIC18FXXX
OTP program memory with higher resolution analog functions
FLASH program memory
PIC17CXXX
8-bit
High-Performance
MCU Family
• 16-bit wide instruction set
• Internal/external vectored
interrupts
• DC - 33 MHz clock speed
• 120 ns instruction cycle
(@ 33 MHz)
• Hardware multiply
PIC17C4X OTP program memory, digital only
PIC17CR4X ROM program memory, digital only
PIC17C7XX OTP program memory with mixed-signal functions
PIC16CXXX
8-bit
Mid-Range
MCU Family
• 14-bit wide instruction set
• Internal/external interrupts
• DC - 20 MHz clock speed
(Note 1)
• 200 ns instruction cycle
(@ 20 MHz)
PIC14CXXX OTP program memory with A/D and D/A functions
PIC16C55X OTP program memory, digital only
PIC16C6X OTP program memory, digital only
PIC16CR6X ROM program memory, digital only
PIC16C62X OTP program memory with comparators
PIC16CR62X ROM program memory with comparators
PIC16CE62X OTP program memory with comparators and EEPROM data
memory
PIC16F62X FLASH program memory with comparators and EEPROM data
memory
PIC16C64X OTP program memory with comparators
PIC16C66X OTP program memory with comparators
PIC16C7X OTP program memory with analog functions (i.e. A/D)
PIC16CR7X ROM program memory with analog functions
PIC16C7XX OTP program memory with higher resolution analog functions
PIC16F8X FLASH program memory and EEPROM data memory
PIC16CR8X ROM program memory and EEPROM data memory
PIC16F87X FLASH program memory with higher resolution analog functions
PIC16C9XX OTP program memory, LCD driver
PIC16C5X
8-bit
Base-Line
MCU Family
• 12-bit wide instruction set
• DC - 20 MHz clock speed
• 200 ns instruction cycle
(@ 20 MHz)
PIC16C5X OTP program memory, digital only
PIC16CR5X ROM program memory, digital only
PIC16C505 OTP program memory, digital only, internal 4 MHz oscillator
PIC16HV540 OTP program memory with high voltage operation
PIC12CXXX
8-bit, 8-pin
MCU Family
• 12- or 14-bit wide
instruction set
• DC - 10 MHz clock speed
• 400 ns instruction cycle
(@ 10 MHz)
• Internal 4 MHz oscillator
PIC12C5XX OTP program memory, digital only
PIC12CE5XX OTP program memory, digital only with EEPROM data memory
PIC12CR5XX ROM program memory, digital only
PIC12C67X OTP program memory with analog functions
PIC12CE67X OTP program memory with analog functions and EEPROM data
memory
Note 1: The maximum clock speed for some devices is less than 20 MHz.
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Development Systems
Microchip is committed to providing useful and
innovative solutions to your embedded system
designs. Our installed base of application development
systems has grown to an impressive 170,000 systems
worldwide.
Among support products offered are MPLAB®-ICE
2000 In-Circuit Emulator running under the Windows
environment. This new real-time emulator supports
low-voltage emulation, to 2.0 volts, and full-speed
emulation. MPLAB, a complete Integrated Development
Environment (IDE), is provided with MPLAB-ICE 2000.
MPLAB allows the user to edit, compile and emulate
from a single user interface, making the developer
productive very quickly. MPLAB-ICE 2000 is designed to
provide product development engineers with an
optimized design tool for developing target applications.
This universal in-circuit emulator provides a complete
MCU design toolset for PICmicro MCUs in the
PIC12CXXX, PIC16C5X, PIC16CXXX, PIC17CXXX
and PIC18CXXX families. MPLAB-ICE 2000 is CE
compliant.
Microchip’s newest development tool, MPLAB In-Circuit
Debugger (ICD) Evaluation Kit, uses the in-circuit
debugging capabilities of the PIC16FXXX and
PIC18FXXX MCU family and Microchip’s ICSP™
capability to debug source code in the application,
debug hardware in real time and program a target
PIC16FXXX and PIC18FXXX device.
PRO MATE II, the full-featured, modular device
programmer, enables you to quickly and easily program
user software into PICmicro MCUs, HCS products and
Serial EEPROMs. PRO MATE II runs under MPLAB IDE
and operates as a stand-alone unit or in conjunction with
a PC-compatible host system.
The PICSTART Plus development kit is a low-cost
development system for the PIC12CXXX, PIC16C5X,
PIC16CXXX and PIC17CXXX MCUs.
PICDEM low-cost demonstration boards are simple
boards which demonstrate the basic capabilities of the
full range of Microchip’s MCUs. Users can program the
sample MCUs provided with PICDEM boards, on a
PRO MATE II or PICSTART Plus programmer, and
easily test firmware. KEELOQ Evaluation Tools support
Microchip’s HCS Secure Data Products.
The Serial EEPROM Designer’s Kit includes
everything necessary to read, write, erase or program
special features of any Microchip Serial EEPROMs.
The Total Endurance Disk is included to aid in
trade-off analysis and reliability calculations. The total
kit can significantly reduce time-to-market and result in
an optimized system.
The FilterLab™ Active Filter Design Tool simplifies
active filter design for embedded systems designers.
The unique FilterLab software automates the design of
the anti-aliasing filter for an analog-to-digital
converter-based data acquisition system. FilterLab
also provides full schematic diagrams of the filter circuit
with component values, a SPICE model, and displays
the frequency and phase response.
In addition to the FilterLab Active Filter Design Tool,
Microchip offers a second analog development tool, the
MXDEV™1 Analog Evaluation System, making it
easier for embedded systems designers to evaluate
and develop with Microchip’s line of stand-alone analog
products. The hardware and software within the
MXDEV 1 system is configured device-specific and
allows single or continuous conversions ofr the
analog-to-digital converter under evaluation.
The MCP2510 Controller Area Network (CAN)
Developer’s Kit makes software developing easy by
using a variety of features to manipulate the
functionality of the MCP2510. The MCP2510 CAN
Developer’s kit provides the ability to read, display and
modify all registers of the MCP2510 on a bit-by-bit or a
byte-by-byte basis.
The microID™ Developer’s Kit is an easy-to-use tool
for design engineers at all skill levels. Available in a
variety of configurations, the microID family of RFID
tags can be configured to match existing tags and be
directly installed - upgrading to contactless
programmability at no added cost. This kit includes all
the hardware, software, reference designs and
samples required to get started in RFID designs.
TABLE 2: PICmicro SYNERGISTIC DEVELOPMENT TOOLS
Development Tool Name PIC12CXXX PIC16C5X PIC16CXXX PIC16F87X PIC17CXXX PIC18CXXX
Integrated Development
Environment (IDE) MPLAB ✔✔✔ — ✔ ✔
C Compiler
MPLAB-C17 — — — — ✔
MPLAB-C18 — — — — — ✔
Full-Featured, Modular
In-Circuit Emulator MPLAB-ICE 2000 ✔✔✔ — ✔ ✔
In-Circuit Debugger
Evaluation Kit MPLAB-ICD — — — ✔ — —
Full-Featured, Modular
Device Programmer PRO MATE II ✔✔✔ — ✔ ✔
Entry-Level Development Kit
with Programmer PICSTART Plus ✔✔✔ — ✔ ✔
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DS00027U-page xx 2000 Microchip Technology Inc.
Software Support
MPLAB Integrated Development Environment (IDE) is
a Windows-based development platform for
Microchip’s PICmicro MCUs. MPLAB IDE offers a
project manager and program text editor, a
user-configurable toolbar containing four pre-defined
sets and a status bar which communicates editing and
debugging information.
MPLAB-IDE is the common user interface for Microchip
development systems tools including MPLAB Editor,
MPASM Assembler, MPLAB-SIM Software Simulator,
MPLIB, MPLINK, MPLAB-C17 Compiler, MPLAB-C18
Compiler, MPLAB-ICE 2000, PRO MATE II
Programmer and PICSTART Plus Development
Programmer.
Microchip endeavors at all times to provide the best
service and responsiveness possible to its customers.
The Microchip Internet site can provide you with the
latest technical information, production released
software for development tools, application notes and
promotional news on Microchip products and
technology. The Microchip World Wide Web address is
http://www.microchip.com.
Secure Data Products Overview
Microchip’s patented KEELOQ® code hopping
technology is the perfect solution for remote keyless
entry and logical/physical access control systems. The
initial device in the family, the HCS300 encoder,
replaces current fixed code encoders in transmitter
applications providing a low cost, integrated solution.
The KEELOQ family is continuing to expand with the
HCS301 (high voltage encoder), HCS200 (low-end,
low-cost encoder), and high-end encoders (HCS360
and HCS361) that meet OEM specifications and
requirements. The HCS410, a self-powered
transponder superset of the HCS360, is the initial
device in a new and expanding encoder/transponder
family.
Microchip provides flexible decoder solutions by
providing optimized routines for Microchip’s PICmicro
MCUs. This allows the designer to combine the
decoder and system functionality in a MCU. The
decoder routines are available under a license
agreement. The HCS500, HCS512 and HCS515 are
the first decoder devices in the KEELOQ family. These
devices are single chip decoder solutions and simplify
designs by handling learning and decoding of
transmitters.
The KEELOQ product family is expanding to include
enhanced encoders and decoders. Typical applications
include automotive RKE, alarm and immobilizer
systems, garage door openers and home security
systems.
*Contact Microchip Technology Inc. for availability.
Analog/Interface Products
Using its technology achievements in developing
analog circuitry for its PICmicro MCU family, the
Company launched a complementary line of
stand-alone analog and interface products. Many of
these stand-alone devices support functionality that
may not currently available on PICmicro MCUs.
Stand-alone analog IC products currently offered
include:
• Analog-to-Digital Converters
• Operational Amplifiers
• System Supervisors
Microchip also offers innovative silicon products to
support a variety of bus interfaces used to transmit data
to and from embedded control systems. The first
interface products support Controller Area Network
(CAN), a bus protocol highly integrated into a variety of
networked applications including automotive.
High-Performance 12-Bit Analog-to-Digital
Converters
The MCP320X 12-bit analog-to-digital converter
(ADC) family is based on a successive approximation
register architecture. The first four members include:
MCP3201, MCP3202, MCP3204 and MCP3208. The
MCP320X family features 100K samples per second
throughput, low power of 400 microamps active and
500 nanoamps standby, wide supply voltage of
2.7-5.5 volts, extended industrial temperature range
of –40° to 85°, +/- 1 LSB DNL and +/- 1 LSB INL max.
at 100 ksps., no missing codes, and a serial output
with an industry-standard SPI™ bus interface. The
MCP320X is available in 1-, 2-, 4-, and 8-input
channel versions (the MCP3201, MPC3202,
MCP3204 and MCP3208, respectively). The devices
KEELOQ Encoder Devices
Product
Transmission
Code
Length Bits
Code
Hopping
Bits
Prog.
Encryption
Key
Bits
Seed
Length
Operating
Voltage
HCS101* 66 — — — 3.5V to 13.0V
HCS200 66 32 64 32 3.5V to 13.0V
HCS201* 66 32 64 32 3.5V to 13.0V
HCS300 66 32 64 32 2.0V to 6.3V
HCS301 66 32 64 32 3.5V to 13.0V
HCS320 66 32 64 32 3.5V to 13.0V
HCS360 67 32 64 48 2.0V to 6.6V
HCS361 67 32 64 48 2.0V to 6.6V
HCS365* 69 32 2 x 64 60 2.0V to 6.6V
HCS370* 69 32 2 x 64 60 2.0V to 6.6V
HCS410 69 32 64 60 2.0V to 6.6V
HCS412* 69 32 64 60 2.0V to 6.6V
HCS470* 69 32 2 x 64 60 2.0V to 6.6V
KEELOQ Decoder Devices
Product
Reception
Length Bits
Transmitters
Supported
Functions
Operating
Voltage
HCS500 67 Up to 7 15 Serial Functions 4.5V to 5.5V
HCS512 67 Up to 4 15 (S0, S1, S2, S3); VLOW, Serial 3.0V to 6.0V
HCS515 67 Up to 7 15 Serial; 3 Parallel 4.5V to 5.5V
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2000 Microchip Technology Inc. DS00027U-page xxi
are offered in PDIP, SOIC and TSSOP packages.
Applications include data acquisition, instrumentation
and measurement, multi-channel data loggers,
industrial PCs, motor control, robotics, industrial
automation, smart sensors, portable instrumentation,
and home medical appliances.
Operational Amplifiers
The MCP60X Operational Amplifier family includes
four devices: MCP601, MCP602, MCP603 and
MCP604. These devices are Microchip’s first 2.7 volt
single supply operational amplifier products. The
MCP60X family offers a gain bandwidth product of 2.8
MHz with low typical operating current of 230 µA. The
MCP60X devices use Microchip's advanced CMOS
technology which provides low bias current, high speed
operation, high open-loop gain and rail-to-rail output
swing.
System Supervisors
Microchip offers a complete family of system
supervisor products. The new devices include the
MCP809/810 and MCP100/101 supervisory circuits
with push-pull output and the MCP120/130 supervisory
circuits with open drain output. The devices are
functionally and pin-out comparable to products from
other analog suppliers.
Controller Area Network (CAN)
Microchip is enhancing its product portfolio by
introducing the CAN Product Family. The MCP2510 is
the smallest, easiest-to-use, CAN controller on the
market today. Combining the MCP2510 with
Microchip’s broad range of high-performance PICmicro
MCUs enables Microchip to support for virtually all of
today’s CAN-based applications. Other potential
benefits of having a separate CAN controller include
the ability for system designers to select from a much
wider variety of MCUs for an optimal performance
solution.
Additional products planned for Microchip’s CAN
product portfolio include other CAN peripherals and a
family of PICmicro MCUs with integrated CAN support.
microID™ RFID Tagging Devices
Only Microchip manufactures world-class components
for every application in the radio frequency
identification (RFID) system. From the advanced,
feature-packed microID family of RFID tags and
high-endurance Serial EEPROMs to high performance
PICmicro MCUs and KEELOQ code hopping encoders -
Microchip's full range of RFID solutions are available
for your tag, peripheral and reader application designs.
The microID family can emulate almost any standard
on the market today. It provides drop-in compatible
solutions to the most commonly used 125 kHz and
13.56 MHz tags and an upgrade migration path for
virtually any application with higher performance and
new features.
Serial EEPROM Overview
Microchip’s high-endurance Serial EEPROMs
complement the diverse MCU product families. Serial
EEPROMs are available in a variety of densities,
operating voltages, bus interface protocols, operating
temperature ranges and space-saving packages.
Densities:
The densities range from 128 bits to 256 Kbits with
higher density devices in development.
Bus Interface Protocols:
We offer all popular protocols: I2C™, Microwire and
SPI.
Operating Voltages:
In addition to standard 5V devices there are two low
voltage families. The “LC” devices operate down to
2.5V, while the breakthrough “AA” family operates, in
both read and write mode, down to 1.8V, making these
devices highly suitable for alkaline and NiCd battery
powered applications.
Temperature Ranges:
Like all Microchip devices, many Serial EEPROMs are
offered in Commercial (0°C to +70°C), Industrial (-40°C
to +85°C) and Extended (-40°C to +125°C) operating
temperature ranges.
Packages:
Small footprint packages include: industry standard
5-lead SOT-23, 8-lead DIP, 8-lead SOIC in JEDEC and
EIAJ body widths, and 14-lead SOIC. The SOIC comes
in two body widths; 150 mil and 207 mil.
Technology Leadership:
Selected Microchip Serial EEPROMs are backed by a
1 million Erase/Write cycle. Microchip's erase/write
cycle endurance is among the best in the world, and only
Microchip offers such unique and powerful development
tools as the Total Endurance disk. This mathematical
software model is an innovative tool used by system
designers to optimize Serial EEPROM performance and
reliability within the application.
Microchip offers Plug-and-Play to the DIMM module
market with the 24LCS52, a special function
single-chip EEPROM that is available in space saving
packages. For Plug-and-Play video monitor
applications, Microchip offers the 24LC21, a
single-chip DDC1™/DDC2-compatible solution. In
addition, Microchip released a high-speed 1 MHz
2-wire Serial EEPROM device ideal for
high-performance embedded systems.
Microchip is a high-volume supplier of Serial
EEPROMs to all the major markets worldwide. The
Company continues to develop new Serial EEPROM
solutions for embedded control applications.
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OTP EPROM Overview
Microchip’s CMOS EPROM devices are produced in
densities from 64K to 512K. Typical applications
include computer peripherals, instrumentation, and
automotive devices. Microchip’s expertise in surface
mount packaging on SOIC and TSOP packages led to
the development of the surface mount OTP EPROM
market where Microchip is a leading supplier today.
Microchip is also a leading supplier of low-voltage
EPROMs for battery powered applications.
MIGRATABLE MEMORY™
TECHNOLOGY
Microchip’s innovative Migratable Memory technology
(MMT) provides socket and software compatibility
among all of its equivalent ROM, OTP and FLASH
memory MCUs. MMT allows customers to match the
selection of MCU memory technology to the product life
cycle of their application, providing an easy migration
path to a lower cost solution whenever appropriate.
FLASH memory is an ideal solution for engineers
designing products for embedded systems – especially
during the development and early stages of the
product. In certain products and applications, FLASH
memory may be used for the life of the product
because of the advantages of field upgradability or
where product inventory flexibility is required.
Once the design enters the pre-production stage and
continues through introduction and growth stages,
OTP program memory provides maximum
programming flexibility and minimum inventory
scrappage. The OTP device is pin and socket
compatible with the FLASH device – providing a lower
cost, high-volume flexible solution.
As the design enters a mature stage and program code
stabilizes, a lower cost, socket compatible ROM
memory device could be used. In some cases, OTP
memory may still be used as the most cost-effective
memory technology for the product. Compatibility and
flexibility are key to the success of the PICmicro MCU
product family, and ultimately the success of our
customers.
FLEXIBLE PROGRAMMING OPTIONS
To meet the stringent design requirements placed on
our customers, the following innovative programming
options are offered. These programming options
address procurement issues by reducing and limiting
work-in-process liability and facilitating finished goods
code revisions. Microchip's worldwide distributors
stock reprogrammable and one-time programmable
inventory, allowing customers to respond to immediate
sales opportunities or accommodate engineering
changes off the shelf.
FLASH (electrically reprogrammable)
PICmicro FLASH MCUs allow erase and
reprogramming of the MCU program memory.
Reprogrammability offers a highly flexible solution to
today's ever-changing market demands – and can
substantially reduce time to market. Users can program
their systems very late in the manufacturing process or
update systems in the field. This allows easy code
revisions, system parameterization or
customer-specific options with no scrappage.
Reprogrammability also reduces the design verification
cycle.
One-Time Programmable (OTP)
PICmicro OTP MCUs are manufactured in high
volumes without customer specific software and can be
shipped immediately for custom programming. This is
useful for customers who need rapid time to market
and flexibility for frequent software updates.
In-Circuit Serial Programming™ (ICSP™)
Microchip's PICmicro FLASH and OTP MCUs feature
ICSP capability. ICSP allows the MCU to be
programmed after being placed in a circuit board,
offering tremendous flexibility, reduced development
time, increased manufacturing efficiency and improved
time to market. This popular technology also enables
reduced cost of field upgrades, system calibration
during manufacturing, the addition of unique
identification codes to the system and system
calibration. Requiring only two I/O pins for most
devices, Microchip offers the most non-intrusive
programming methodology in the industry.
Self Programming
Microchip's PIC16F87X family features self
programming capability. Self programming enables
remote upgrades to the FLASH program memory and
the end equipment through a variety of medium ranging
from Internet and Modem to RF and Infrared. To setup
for self programming, the designer programs a simple
boot loader algorithm in a code protected area of the
FLASH program memory. Through the selected
medium, a secure command allows entry into the
PIC16F87X MCU through the USART, I2C or SPI serial
communication ports. The boot loader is then enabled
to reprogram the PIC16F87X FLASH program memory
with data received over the desired medium. And, of
course, self programming is accomplished without the
need for external components and without limitations
on the PIC16F87X’s operating speed or voltage.
Quick-Turn Programming (QTP)
Microchip offers a QTP programming service for
factory production orders. This service is ideal for
customers who choose not to program a medium to
high unit volume in their own factories, and whose
production code patterns have stabilized.
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Serialized Quick-Turn Programming (SQTPSM)
SQTP is a unique, flexible programming option that
allows Microchip to program serialized, random or
pseudo-random numbers into each device. Serial
programming allows each device to have a unique
number which can serve as an entry-code, password or
ID number.
Masked ROM
Microchip offers Masked ROM versions of many of its
most popular PICmicro MCUs, giving customers the
lowest cost option for high volume products with stable
firmware.
Future Products and Technology
Microchip is constantly developing advanced process
technology modules and new products that utilize our
advanced manufacturing capabilities. Current
production technology utilizes lithography dimensions
down to 0.7 micron.
Microchip’s research and development activities
include exploring new process technologies and
products that have industry leadership potential.
Particular emphasis is placed on products that can be
put to work in high-performance broad-based markets.
Equipment is continually updated to bring the most
sophisticated process, CAD and testing tools online.
Cycle times for new technology development are
continuously reduced by using in-house mask
generation, a high-speed pilot line within the
manufacturing facility and continuously improving
methodologies.
Objective specifications for new products are
developed by listening to our customers and by close
co-operation with our many customer-partners
worldwide.
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NOTES:
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2000 Microchip Technology Inc. DS39501A-page 1-1
Introduction
1
Section 1. Introduction
HIGHLIGHTS
This section of the manual contains the following major topics:
1.1 Introduction .................................................................................................................... 1-2
1.2 Manual Objective ........................................................................................................... 1-3
1.3 Device Structure ............................................................................................................ 1-4
1.4 Development Support .................................................................................................... 1-6
1.5 Device Varieties ............................................................................................................. 1-7
1.6 Style and Symbol Conventions .................................................................................... 1-12
1.7 Related Documents ..................................................................................................... 1-14
1.8 Related Application Notes............................................................................................ 1-17
1.9 Revision History........................................................................................................... 1-18
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1.1 Introduction
Microchip is the Embedded Control Solutions Company. The company’s focus is on products
that meet the needs of the embedded control market. We are a leading supplier of:
• 8-bit general purpose microcontrollers (PICmicro® MCUs)
• Speciality and standard non-volatile memory devices
• Security devices (KEELOQ®)
• Application specific standard products
Please request a Microchip Product Line Card for a listing of all the interesting products that we
have to offer. This literature can be obtained from your local sales office, or downloaded from the
Microchip web site (www.microchip.com).
In the past, 8-bit MCU users were fixed on the traditional MCU model for production, a ROM device.
Microchip has been the leader in changing this perception by showing that OTP devices can give
a better lifetime product cost compared to ROM versions.
Microchip has strength in FLASH and EPROM technology. This makes it the memory technology
of choice for the PICmicro MCU’s program memory. Microchip has minimized the cost difference
between EPROM and ROM memory technology. Therefore, Microchip can pass these benefits on
to our customers. This is not true for other MCU vendors, and is seen in the price difference
between their FLASH/EPROM and ROM versions.
The growth of Microchip’s 8-bit MCU market share is a testament to the PICmicro MCU’s ability to
meet the needs of many customers. This growth has made the PICmicro architecture one of the
top two architectures available in the general market today. This growth was fueled by the Microchip
vision of the benefits of a low cost Field Programmable MCU solution. Some of the benefits
for the customer include:
• Quick time to market
• Allows code changes to product during production run
• No Non-Recurring Engineering (NRE) charges for Mask Revisions
• Ability to easily serialize the product
• Ability to store calibration data without additional hardware
• Better able to maximize use of PICmicro MCU inventory
• Less risk, since the same device is used for development as well as for production.
Microchip’s PICmicro 8-bit MCUs offer a price/performance ratio that allows them to be considered
for any traditional 8-bit MCU application, as well as some traditional 4-bit applications (Base-Line
family), low-end 16-bit applications (PIC17CXXX and PIC18CXXX families), dedicated logic
replacement and low-end DSP applications (High-End and Enhanced families). These features
and price-performance mix make PICmicro MCUs an attractive solution for most applications.
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Section 1. Introduction
Introduction
1
1.2 Manual Objective
PICmicro devices are grouped by the size of their Instruction Word and their Instruction Set. The
four current PICmicro families and their Instruction Word length are:
1. Base-Line: 12-bit Instruction Word length
2. Mid-Range: 14-bit Instruction Word length
3. High-End: 16-bit Instruction Word length
4. Enhanced: 16-bit Instruction Word length
This manual focuses on the Enhanced MCU family of devices, which are also referred to as the
PIC18CXXX MCU family.
The operation of the Enhanced MCU family architecture and peripheral modules is explained,
but does not cover, the specifics of each device. This manual is not intended to replace the
device data sheets, but complement them. In other words, this guide supplies the general details
and operation of the PICmicro architecture and peripheral modules, while the data sheet gives
the specific details (such as device memory mapping).
Initialization examples are given throughout this manual. These examples sometimes need to be
written as device specific as opposed to family generic, though they are valid for most other
devices. Some modifications may be required for devices with variations in register file mappings.
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1.3 Device Structure
Each part of a device can be placed into one of three groups:
1. Core
2. Peripherals
3. Special Features
1.3.1 Core
The core pertains to the basic features that are required to make the device operate. These
include:
1. Oscillator Revision “DS39502A”
2. Reset Revision “DS39503A”
3. Architecture Revision “DS39504A”
4. CPU (Central Processing Unit) and Revision “DS39505A”
ALU (Arithmetic Logical Unit)
5. Hardware 8x8 Multiplier Revision “DS31006A”
6. Memory Revision “DS31007A”
7. Table Read / Table Write Revision “DS39508A”
8. System Bus Revision “DS39509A”
9. Interrupts Revision “DS39510A”
10. Instruction Set Revision “DS39532A”
1.3.2 Peripherals
Peripherals are the features that add a differentiation from a microprocessor. These ease in interfacing
to the external world (such as general purpose I/O, A/D inputs, and PWM outputs), and
internal tasks, such as keeping different time bases (i.e. timers). The peripherals that are discussed
are:
1. I/O Revision “DS39511A”
1. Parallel Slave Port (PSP) Revision “DS39512A”
2. Timer0 Revision “DS39513A”
3. Timer1 Revision “DS39514A”
4. Timer2 Revision “DS39515A”
5. Timer3 Revision “DS39516A”
6. Capture/Compare/PWM (CCP) Revision “DS39517A”
7. Serial Slave Port (SSP) Revision “DS39519A”
8. Master Synchronous Serial Port (MSSP) Revision “DS39520A”
9. Addressable USART Revision “DS39521A”
10. CAN Revision “DS39522A”
11. Comparator Voltage Reference Revision “DS31023A”
12. Comparators Revision “DS39525A”
13. Compatible 10-bit A/D Converter Revision “DS31026A”
14. 10-bit A/D Converter Revision “DS31027A”
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Section 1. Introduction
Introduction
1
1.3.3 Special Features
Special features are the unique features that help to:
• Decrease system cost
• Increase system reliability
• Increase design flexibility
The Enhanced PICmicro MCUs offer several features that help achieve these goals. The special
features discussed are:
1. Low Voltage Detect Revision “DS39528A”
2. WDT and Sleep Operation Revision “DS31029A”
3. Device Configuration Bits Revision “DS39530A”
4. In-Circuit Serial Programming™ (ICSP™) Revision “DS39531A”
1.3.4 Other Sections
This section provides the cross references for the remaining sections of this manual.
1. Introduction Revision “DS39501A”
2. Electrical Specifications Revision “DS31033A”
3. Device Characteristics Revision “DS31034A”
4. Development Tools Revision “DS31035A”
5. Code Development Revision “DS31036A”
6. Appendix Revision “DS39537A”
7. Glossary Revision “DS39538A”
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1.4 Development Support
Microchip offers a wide range of development tools that allow users to efficiently develop and
debug application code. Microchip’s development tools can be broken down into four categories:
1. Code generation
2. Hardware/Software debug
3. Device programmer
4. Product evaluation boards
All tools developed by Microchip operate under the MPLAB® Integrated Development Environment
(IDE), while some third party tools may not. The code generation tools include:
• MPASM
• MPLAB®-C17 (for PIC17CXXX family only)
• MPLAB®-C18 (for PIC18CXXX family only)
These software development programs include device header files. Each header file defines the
register names (as shown in the device data sheet) to the specified address or bit location. Using
the header files eases code migration and reduces the tediousness of memorizing a register’s
address or a bit’s position in a register.
Tools which ease in debugging software are:
• MPLAB®-ICE In-Circuit Emulator
• PICMASTER® In-Circuit Emulator
• ICEPIC In-Circuit Emulator
• MPLAB®-SIM Software Simulator
After generating and debugging the application software, the device will need to be programmed.
Microchip offers two levels of programmers:
1. PICSTART Plus programmer
2. PRO MATE II programmer
Demonstration boards allow the developer of software code to evaluate the capability and suitability
of the device to the application. The demo boards offered are:
• PICDEM-1
• PICDEM-2 (can be used with PIC18CXX2 devices)
• PICDEM-3
• PICDEM-14A
• PICDEM-17
At the time of publication, only PICDEM-2 could be used with some Enhanced MCU devices.
A full description of each of Microchip’s development tools is discussed in the “Development
Tools” section. As new tools are developed, product briefs and user guides may be obtained
from the Microchip web site (www.microchip.com) or from your local Microchip Sales Office.
Code development recommendations and techniques are provided in the “Code Development”
section.
Microchip offers other reference tools to speed the development cycle. These include:
• Application Notes
• Reference Designs
• Microchip web site
• Local Sales Offices with Field Application Support
• Corporate Support Line
The Microchip web site lists other sites that may be useful references.
Note: Microchip strongly recommends that the supplied header files be used in the source
code of your program. This eases code migration, improves code readability, and
increases the quality and depth of the technical support that Microchip can offer.
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Section 1. Introduction
Introduction
1
1.5 Device Varieties
Once the functional requirements of the device are specified, other choices need to be made.
These include:
• Memory technology
• Operating voltage
• Operating temperature range
• Operating frequency
• Packaging
Microchip has a large number of options and option combinations, one of which should fulfill your
requirements.
1.5.1 Memory Varieties
Memory technology has no effect on the logical operation of a device. Due to the different processing
steps required, some electrical characteristics may vary between devices with the same
feature set/pinout but with different memory technologies. An example is the electrical characteristic
VIL (Input Low Voltage), which may have some difference between a typical EPROM device
and a typical ROM device.
Each device has a variety of frequency ranges and packaging options available. Depending on
application and production requirements, the proper device options can be identified using the
information in the Product Identification System section at the end of each data sheet. When
placing orders, please use the “Product Identification System” at the back of the data sheet to
specify the correct part number.
When discussing the functionality of the device, the memory technology and the voltage range
do not matter. Microchip offers three program memory types. The memory type is designated in
the part number by the first letter(s) after the family affiliation designators.
1. C, as in PIC18CXXX. These devices have EPROM type memory.
2. CR, as in PIC18CRXXX. These devices have ROM type memory.
3. F, as in PIC18FXXX. These devices have FLASH type memory.
1.5.1.1 EPROM
Microchip focuses on Erasable Programmable Read Only Memory (EPROM) technology to give
customers flexibility throughout their entire design cycle. With this technology, Microchip offers
various packaging options as well as services.
1.5.1.2 Read Only Memory (ROM) Devices
Microchip offers a masked Read Only Memory (ROM) version of several of the highest volume
parts, thus giving customers a lower cost option for high volume, mature products.
ROM devices do not allow serialization information in the program memory space.
For information on submitting ROM code, please contact your local Microchip sales office.
1.5.1.3 FLASH Memory Devices
These devices are electrically erasable, and can therefore be offered in a low cost plastic package.
Being electrically erasable, these devices can be erased and reprogrammed without
removal from the circuit. A device will have the same specifications whether it is used for prototype
development, pilot programs or production.
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1.5.2 Operating Voltage Range Options
All Enhanced PICmicro MCUs operate over the standard voltage range. Devices are also offered
which operate over an extended voltage range (and reduced frequency range). Table 1-1 shows
all possible memory types and voltage range designators for the PIC18CXXX MCU family. The
designators are in bold typeface.
Table 1-1: Device Memory Type and Voltage Range Designators
As you can see in Table 1-2, Microchip specifies its extended range devices at a more conservative
voltage range until device characterization has ensured they will be able to meet the goal of
their final design specifications.
Table 1-2: Typical Voltage Ranges for Each Device Type
Memory Type
Voltage Range
Standard Extended
EPROM PIC18CXXX PIC18LCXXX
ROM PIC18CRXXX PIC18LCRXXX
FLASH PIC18FXXX PIC18LFXXX
Note: Not all memory types may be available for a particular device.
Typical Voltage Range EPROM ROM Flash
Standard C 4.2 - 5.5V CR 4.2 - 5.5V F 4.2 - 5.5V
Extended Before device characterization LC 3.0 - 5.5V LCR 3.0 - 5.5V LF 3.0 - 5.5V
Final specification (1) LC 2.5 - 5.5V LCR 2.5 - 5.5V LF 2.0 - 5.5V
Note 1: This voltage range depends on the results of device characterization.
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Section 1. Introduction
Introduction
1
Figure 1-1 and Figure 1-2 show example Voltage to Frequency Charts for the Enhanced MCU
family. The voltages and frequencies of any given device may be different than those shown.
These figures are intended to show that with an LC (extended voltage) device, the user can make
a trade-off between voltage of operation and the frequency of the device. The device FMAX is
given below the graph. As the voltages and frequencies of the device change, the equation for
the device FMAX will change. Equation 1-1 shows the general equation to determine the device
FMAX.
Equation 1-1: Generic FMAX Equation
Figure 1-1: PIC18CXXX Voltage-Frequency Graph - Example
Figure 1-2: PIC18LCXXX Voltage-Frequency Graph - Example
FMAX = (slope) (VDDAPPMIN - VDDMIN) + offset
Frequency
Voltage
6.0 V
5.5 V
4.5 V
4.0 V
2.0 V
40 MHz
5.0 V
3.5 V
3.0 V
2.5 V
PIC18CXXX
4.2V
Frequency
Voltage
6.0 V
5.5 V
4.5 V
4.0 V
2.0 V
40 MHz
5.0 V
3.5 V
3.0 V
2.5 V
PIC18LCXXX
6 MHz
4.2V
Note: VDDAPPMIN is the minimum voltage of the PICmicro device in the application.
FMAX = (20.0 MHz/V) (VDDAPPMIN - 2.5 V) + 6 MHz
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1.5.3 Packaging Varieties
Depending on the development phase of your project, one of three package types would be
used.
The first package type is ceramic with an erasure window. The window allows ultraviolet light into
the package so that the device inside may be erased. The package is used for the development
phase, since the device’s program memory can be erased and reprogrammed many times.
The second package type is a low cost plastic package. This package type is used in production
where device cost is to be kept to a minimum.
Lastly, there is the Die option. A Die is an unpackaged device that has been tested. Dies are used
in low cost designs and designs where board space is at a minimum. For additional information
on die support, please refer to the Die Support Document (DS30258).
Table 1-3 shows a quick summary of the typical use for each package type.
Table 1-3: Typical Package Uses
1.5.3.1 UV Erasable Devices
The UV erasable version of EPROM program memory devices is optimal for prototype development
and pilot programs.
These devices can be erased and reprogrammed to any of the configuration modes. Third party
programmers are available. Refer to Microchip’s Third Party Guide (DS00104) for a list of
sources.
The amount of time required to completely erase a UV erasable device depends on the:
• Wavelength of the light
• Intensity of the light
• Distance of the device from the UV source
• Process technology of the device (size of the memory cells).
1.5.3.2 One-Time-Programmable (OTP) Devices
The availability of OTP devices is especially useful for customers expecting code changes and
updates.
OTP devices in plastic packages permit the user to program them once. Often the system can
be designed so that programming may be performed in-circuit (after the device has been
mounted on the circuit board).
1.5.3.3 FLASH Devices
These devices are electrically erasable, and can therefore be offered in a low cost plastic package.
Being electrically erasable, these devices can be both erased and reprogrammed without
removal from the circuit. A device will have the same specifications whether it is used for prototype
development, pilot programs, or production.
Package Type Typical Usage
Windowed Development mode
Plastic Production
Die Special applications, such as those which require minimum board space
Note: Fluorescent lights and sunlight both emit ultraviolet light at the erasure wavelength.
Leaving a UV erasable device’s window uncovered could cause, over time, the
device’s memory cells to become erased. The erasure time for a fluorescent light is
about three years, while sunlight requires only about one week. To prevent the
memory cells from losing data, an opaque label should be placed over the erasure
window.
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Section 1. Introduction
Introduction
1
1.5.3.4 ROM Devices
ROM devices have their program memory fixed at the time of the silicon manufacture. Since the
program memory cannot be changed, the device is usually housed in the low cost plastic package.
1.5.3.5 Die
The Die option allows the board size to become as small as physically possible. The Die Support
document (DS30258) explains general information about using and designing with Die. There
are also individual specification sheets that detail Die specific information. Manufacturing with
Die requires special knowledge and equipment. This means that the number of manufacturing
houses that support Die will be limited. If you decide to use the Die option, please research your
manufacturing sites to ensure that they will be able to meet the specialized requirements of Die
use.
1.5.3.6 Specialized Services
For OTP customers with established code, Microchip offers two specialized services. These two
services, Quick Turn Production Programming and Serialized Quick Turn Production Programming,
allow customers to shorten their manufacturing cycle time.
1.5.3.6.1 Quick Turn Production (QTP) Programming
Microchip offers this programming service for factory production orders. This service is made
available for users who choose not to program a medium to high quantity of units at their factory
and whose code patterns have stabilized. The devices are identical to the OTP devices, but with
all EPROM locations and configuration options already programmed by Microchip. Certain code
and prototype verification procedures apply before production shipments are available. Please
contact your local Microchip sales office for more details.
1.5.3.6.2 Serialized Quick Turn Production (SQTPSM) Programming
Microchip offers a unique programming service where a few user-defined locations in each
device are programmed with unique numbers. These numbers may be:
• Random numbers
• Pseudo-random numbers
• Sequential numbers
Serial programming allows each device to have a unique number which can serve as an
entry-code, password, ID, or serial number.
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1.6 Style and Symbol Conventions
Throughout this document, certain style and font format conventions are used. Most format conventions
imply a distinction should be made for the emphasized text. The MCU industry has
many symbols and non-conventional word definitions/abbreviations. Table 1-4 provides a
description for many of the conventions contained in this document. A glossary is provided in the
“Glossary” section, which contains more word and abbreviation definitions that are used
throughout this manual.
1.6.1 Document Conventions
Table 1-4 defines some of the symbols and terms used throughout this manual.
Table 1-4: Document Conventions
Symbol or Term Description
set To force a bit/register to a value of logic ‘1’.
clear To force a bit/register to a value of logic ‘0’.
reset 1) To force a register/bit to its default state.
2) A condition in which the device places itself after a device reset
occurs. Some bits will be forced to ‘0’ (such as interrupt enable bits),
while others will be forced to ‘1’ (such as the I/O data direction bits).
0xnn or nnh Designates the number ‘nn’ in the hexadecimal number system. These
conventions are used in the code examples.
B’bbbbbbbb’ Designates the number ‘bbbbbbbb’ in the binary number system. This
convention is used in the text and in figures and tables.
R-M-W Read - Modify - Write. This is when a register or port is read, then the
value is modified, and that value is then written back to the register or
port. This action can occur from a single instruction (such as bit set file,
BSF) or a sequence of instructions.
: (colon) Used to specify a range or the concatenation of registers/bits/pins.
One example is TMR1H:TMR1L, which is the concatenation of two 8-bit
registers to form a 16-bit timer value, while SSPM3:SSPM0 are 4-bits
used to specify the mode of the SSP module.
Concatenation order (left-right) usually specifies a positional relationship
(MSb to LSb, higher to lower).
< > Specifies bit(s) locations in a particular register.
One example is SSPCON (or SSPCON<3:0>) which
specifies the register and associated bits or bit positions.
Courier Font Used for code examples, binary numbers and for Instruction Mnemonics
in the text.
Times Font Used for equations and variables.
Times, Bold Font,
Italics
Used in explanatory text for items called out from a graphic/equation/example.
Note A Note presents information that we wish to reemphasize, either to help
you avoid a common pitfall, or make you aware of operating differences
between some device family members. A Note is always in a shaded box
(as below), unless used in a table, where it is at the bottom of the table
(as in this table).
Note: This is a Note in a note box.
Caution (1) A caution statement describes a situation that could potentially damage
software or equipment.
Warning (1) A warning statement describes a situation that could potentially cause
personal harm.
Note 1: The information in a caution or a warning is provided for your protection. Please read
each caution and warning carefully.
39500 18C Reference Manual.book Page 12 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39501A-page 1-13
Section 1. Introduction
Introduction
1
1.6.2 Electrical Specifications
Throughout this manual, there will be references to electrical specification parameter numbers.
A parameter number represents a unique set of characteristics and conditions that is consistent
between every data sheet, though the actual parameter value may vary from device to device.
The “Electrical Specifications” section shows all the specifications that are documented for all
devices. No one device has all these specifications. This section is intended to let you know the
types of parameters that Microchip specifies. The value of each specification is device dependent,
though we strongly attempt to keep them consistent across all devices.
Table 1-5: Electrical Specification Parameter Numbering Convention
Parameter
Number
Format
Comment
DXXX DC Specification
AXXX DC Specification for Analog Peripherals
XXX Timing (AC) Specification
PDXXX Device Programming DC Specification
PXXX Device Programming Timing (AC) Specification
Legend: XXX represents a number.
39500 18C Reference Manual.book Page 13 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39501A-page 1-14 2000 Microchip Technology Inc.
1.7 Related Documents
Microchip, as well as other sources, offers additional documentation which can aid in your development
with PICmicro MCUs. These lists contain the most common documentation, but other
documents may also be available. Please check the Microchip web site (www.microchip.com) for
the latest published technical documentation.
1.7.1 Microchip Documentation
The following documents are available from Microchip. Many of these documents provide application
specific information that give actual examples of using, programming and designing with
PICmicro MCUs.
1. MPASM and MPLINK (w/ MPLIB) User’s Guide (DS33014)
This document explains how to use Microchip’s MPASM assembler.
2. MPLAB®-CXX Compiler User’s Guide (DS51217)
This document explains how to use Microchip’s MPLAB-C17 and MPLAB-C18 compilers.
3. MPLAB® IDE, Simulator, Editor User’s Guide (DS51025)
This document explains how to use Microchip’s MPLAB Integrated Development Environment.
4. MPLAB®-CXX Reference Guide Libraries and Precompiled Object Files (DS51224)
This document explains how to use Microchip’s MPLAB Reference Guide Libraries and
Precompiled Object Files.
5. PICMASTER® User’s Guide (DS30421)
This document explains how to use Microchip’s PICMASTER In-Circuit Emulator.
6. PRO MATE® User’s Guide (DS30082)
This document explains how to use Microchip’s PRO MATE Universal Programmer.
7. PICSTART®-Plus User’s Guide (DS51028)
This document explains how to use Microchip’s PICSTART-Plus low-cost universal programmer.
8. PICmicro® Mid-Range MCU Family Reference Manual (DS33023)
This document discusses the operation of PICmicro Mid-Range MCU devices, explaining
the detailed operation of the architecture and peripheral modules. It is a compliment to the
device data sheets for the Mid-Range family.
9. Embedded Control Handbook Volume I (DS00092)
This document contains a plethora of application notes. This is useful for insight on how
to use the device (or parts of it), as well as getting started on your particular application
due to the availability of extensive code files.
10. Embedded Control Handbook Update 2000 (DS00711)
This document contains additional application notes.
11. Embedded Control Handbook Volume II Math Library (DS00167)
This document contains the Math Libraries for PICmicro MCUs.
12. In-Circuit Serial Programming Guide™ (DS30277)
This document discusses implementing In-Circuit Serial Programming.
13. PICDEM-1 User’s Guide (DS33015)
This document explains how to use Microchip’s PICDEM-1 demo board.
14. PICDEM-2 User’s Guide (DS30374)
This document explains how to use Microchip’s PICDEM-2 demo board.
15. PICDEM-3 User’s Guide (DS51079)
This document explains how to use Microchip’s PICDEM-3 demo board.
16. PICDEM-14A User’s Guide (DS51097)
This document explains how to use Microchip’s PICDEM-14A demo board.
17. PICDEM-17 User’s Guide (DS39024)
This document explains how to use Microchip’s PICDEM-17 demo board.
18. Third Party Guide (DS00104)
This document lists Microchip’s third parties, as well as various consultants.
19. Die Support (DS30258)
This document gives information on using Microchip products in Die form.
39500 18C Reference Manual.book Page 14 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39501A-page 1-15
Section 1. Introduction
Introduction
1
1.7.2 Third Party Documentation
There are several documents available from third party sources around the world. Microchip
does not review these documents for technical accuracy. However, they may be a helpful source
for understanding the operation of Microchip PICmicro MCU devices. This is not necessarily a
complete list, but are the documents that we were aware of at the time of printing. For more information
on how to contact some of these sources, as well as any new sources that we become
aware of, please visit the Microchip web site (www.microchip.com).
DOCUMENT LANGUAGE
The PIC16C5X Microcontroller: A Practical Approach to
Embedded Control
Bill Rigby/ Terry Dalby, Tecksystems Inc.
0-9654740-0-3 ........................................................................................................... English
Easy PIC'n
David Benson, Square 1 Electronics
0-9654162-0-8 ........................................................................................................... English
A Beginner’s Guide to the Microchip PIC®
Nigel Gardner, Bluebird Electronics
1-899013-01-6 ........................................................................................................... English
PIC Microcontroller Operation and Applications
DN de Beer, Cape Technikon..................................................................................... English
Digital Systems and Programmable Interface Controllers
WP Verburg, Pretoria Technikon ................................................................................ English
Mikroprozessor PIC16C5X
Michael Rose, Hüthig
3-7785-2169-1 .......................................................................................................... German
Mikroprozessor PIC17C42
Michael Rose, Hüthig
3-7785-2170-5 .......................................................................................................... German
Les Microcontrolleurs PIC et mise en oeuvre
Christian Tavernier, Dunod
2-10-002647-X ............................................................................................................ French
Microcontrolleurs PIC a structure RISC
C.F. Urbain, Publitronic
2-86661-058-X ............................................................................................................ French
New Possibilities with the Microchip PIC
RIGA ......................................................................................................................... Russian
39500 18C Reference Manual.book Page 15 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39501A-page 1-16 2000 Microchip Technology Inc.
DOCUMENT LANGUAGE
PIC16C5X/71/84 Development and Design, Part 1
United Tech Electronic Co. Ltd
957-21-0807-7...........................................................................................................Chinese
PIC16C5X/71/84 Development and Design, Part 2
United Tech Electronic Co. Ltd
957-21-1152-3...........................................................................................................Chinese
PIC16C5X/71/84 Development and Design, Part 3
United Tech Electronic Co. Ltd
957-21-1187-6...........................................................................................................Chinese
PIC16C5X/71/84 Development and Design, Part 4
United Tech Electronic Co. Ltd
957-21-1251-1...........................................................................................................Chinese
PIC16C5X/71/84 Development and Design, Part 5
United Tech Electronic Co. Ltd
957-21-1257-0...........................................................................................................Chinese
PIC16C84 MCU Architecture and Software Development
ICC Company
957-8716-79-6...........................................................................................................Chinese
39500 18C Reference Manual.book Page 16 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39501A-page 1-17
Section 1. Introduction
Introduction
1
1.8 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced MCU family (they may be written for
the Base-Line, Mid-Range, or High-End families), but the concepts are pertinent, and could be
used (with modification and possible limitations). The current application notes related to an introduction
to Microchip’s PICmicro MCUs are:
Title Application Note #
A Comparison of Low End 8-bit Microcontrollers AN520
PIC16C54A EMI Results AN577
Continuous Improvement AN503
Improving the Susceptibility of an Application to ESD AN595
Plastic Packaging and the Effects of Surface Mount Soldering Techniques AN598
Migrating Designs from PIC16C74A/74B to PIC18C442 AN716
PIC17CXXX to PIC18CXXX Migration AN726
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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PIC18C Reference Manual
DS39501A-page 1-18 2000 Microchip Technology Inc.
1.9 Revision History
Revision A
This is the initial released revision of Enhanced MCU Introduction.
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2000 Microchip Technology Inc. DS39502A-page 2-1
Oscillator
2
Section 2. Oscillator
HIGHLIGHTS
This section of the manual contains the following major topics:
2.1 Introduction .................................................................................................................... 2-2
2.2 Control Register............................................................................................................. 2-3
2.3 Oscillator Configurations................................................................................................ 2-4
2.4 Crystal Oscillators/Ceramic Resonators ........................................................................ 2-6
2.5 External RC Oscillator.................................................................................................. 2-15
2.6 HS4 (HS oscillator with 4xPLL enabled) ...................................................................... 2-18
2.7 Switching to Low Power Clock Source......................................................................... 2-19
2.8 Effects of Sleep Mode on the On-Chip Oscillator......................................................... 2-23
2.9 Effects of Device Reset on the On-Chip Oscillator ...................................................... 2-23
2.10 Design Tips.................................................................................................................. 2-24
2.11 Related Application Notes............................................................................................ 2-25
2.12 Revision History........................................................................................................... 2-26
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PIC18C Reference Manual
DS39502A-page 2-2 2000 Microchip Technology Inc.
2.1 Introduction
The device system clock is required for the device to execute instructions and for the peripherals
to function. Four device system clock periods (TSCLK) generate one internal instruction clock
cycle (TCY).
The device system clock (TSCLK) is derived from an external system clock. This external system
clock can be generated in one of eight different oscillator modes. The device configuration bits
select the oscillator mode. Device configuration bits are nonvolatile memory locations and the
operating mode is determined by the value written during device programming. The oscillator
modes are:
• EC External Clock
• ECIO External Clock with I/O pin enabled
• LP Low Frequency (Power) Crystal
• XT Crystal/Resonator
• HS High Speed Crystal/Resonator
• RC External Resistor/Capacitor
• RCIO External Resistor/Capacitor with I/O pin enabled
• HS4 High Speed Crystal/Resonator with 4x frequency PLL multiplier enabled
Multiple oscillator circuits can be implemented on an Enhanced Architecture device. There is the
default oscillator (OSC1), and additional oscillators may be available, such as the Timer1 oscillator.
Software may allow these auxiliary oscillators to be switched in as the device oscillator. The
Timer1 oscillator is a low frequency (low power) oscillator that is designed to be operated at
32kHz. Figure2-1 shows a block diagram of the oscillator options.
The output signal of the Timer1 oscillator circuitry is a low frequency (power) clock source (TT1P).
The source for the device system clock can be switched from the default clock (TSCLK) to the
32kHz-clock low power clock source (TT1P) under software control. Switching to the 32kHz low
frequency (power) clock source from any of the eight default clock sources may allow power
saving.
These oscillator options are made available to allow a single device type the flexibility to fit applications
with different oscillator requirements. The RC oscillator option saves system cost, while
the LP crystal option saves power. The HS4 option allows frequency of incoming crystal oscillator
signal to be multiplied by four for higher internal clock frequency. This is useful for customers who
are concerned with EMI due to high frequency crystals. The device configuration bits are used
to select these various options. For more details on the device configuration bits, see the “Device
Configuration Bits” section.
Figure 2-1: Device Clock Sources
PIC18CXXX
TOSC
4 x PLL
TT1P
TSCLK
Clock
Source MUX
TOSC/4
Timer1 Oscillator
T1OSCEN
Enable
Oscillator
T1OSO
T1OSI
Clock Source option
for other modules
OSC1
OSC2
Sleep
Main Oscillator
(FOSC2:FOSC0)
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2000 Microchip Technology Inc. DS39502A-page 2-3
Section 2. Oscillator
Oscillator
2
2.2 Control Register
Register 2-1 shows the OSCCON register which contains the control bit to allow switching of the
system clock between the primary oscillator and the Timer1 oscillator.
Register 2-1: OSCCON Register
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-1
— — — — — — — SCS
bit 7 bit 0
bit 7-1 Unimplemented: Read as '0'
bit 0 SCS: System Clock Switch bit
when OSCSEN configuration bit = ’0’ and T1OSCEN bit is set:
1 = Switch to Timer1 Oscillator/Clock pin
0 = Use primary Oscillator/Clock input pin
when OSCSEN and T1OSCEN are in other states:
bit is forced clear
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = Bit is set ’0’ = Bit is cleared x = Bit is unknown
Note: The Timer1 oscillator must be enabled to switch the system clock source. The
Timer1 oscillator is enabled by setting the T1OSCEN bit in the Timer1 control register
(T1CON). If the Timer1 oscillator is not enabled, then any write to the SCS bit will be
ignored (SCS bit forced cleared) and the main oscillator will continue to be the system
clock source.
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PIC18C Reference Manual
DS39502A-page 2-4 2000 Microchip Technology Inc.
2.3 Oscillator Configurations
The oscillator selection is configured at time of device programming. The user can program up
to three device configuration bits (FOSC2:FOSC0) to select one of eight modes.
2.3.1 Oscillator Types
PIC18CXXX devices can have up to eight different oscillator modes for the default clock source
(TSCLK). These eight modes are:
• EC External Clock
• ECIO External Clock with IO pin enabled
• LP Low Frequency (Power) Crystal
• XT Crystal/Resonator
• HS High Speed Crystal/Resonator
• RC External Resistor/Capacitor
• RCIO External Resistor/Capacitor with IO pin enabled
• HS4 High Speed Crystal/Resonator with 4x frequency PLL multiplier enabled
The main difference between the LP, XT and HS modes is the gain of the internal inverter of the
oscillator circuit, which allows the different frequency ranges. Table 2-1 gives information to aid
in selecting an oscillator mode. In general, use the oscillator option with the lowest possible gain
that still meets specifications. This will result in lower dynamic currents (IDD). The frequency
range of each oscillator mode is the recommended frequency cutoff, but the selection of a different
gain mode is acceptable as long as a thorough validation is performed (voltage, temperature,
component variations (resistor, capacitor, and internal microcontroller oscillator circuitry).
Switching the system clock source to the alternate clock source is controlled by the application
software. The user can switch from any of the eight default clock sources. This is done by setting
the SCS (System Clock Switch) bit in the OSCCON register. The requirements for switching to
the alternate clock source are:
• Timer1 clock oscillator must be enabled (T1OSCEN is set ’1’).
• The OSCEN configuration bit must be cleared (‘0’).
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2000 Microchip Technology Inc. DS39502A-page 2-5
Section 2. Oscillator
Oscillator
2
Table 2-1: Selecting the Oscillator Mode for Devices
FOSC2:FOSC0
Configuration
Bits
OSC
Mode
OSC
Feedback
Inverter
Gain
OSC2/CLKO
Function Comment
111 RCIO Zero Gain.
Device
turned off to
save current.
I/O Least expensive solution for device oscillation
(only an external resistor and capacitor is
required).
Most variation in time-base. Device’s default
mode. OSC2/CLKO is configured as general
purpose I/O pin. This pin is multiplexed with one
of the device’s PORT pins.
110 HS4 High Gain — Highest frequency application.
This works with the HS oscillator circuit mode
and phase lock loop. This mode consumes the
most current. The internal phase lock loop
circuit multiplies the external oscillator frequency
by 4.
101 ECIO Zero Gain.
Device
turned off to
save current.
I/O External clock mode with OSC2/CLKO configured
as general purpose I/O pin. This pin is multiplexed
with one of the device’s PORT pins.
OSC1/CLKI is hi-impedance and can be driven
by CMOS drivers.
100 EC Zero Gain.
Device
turned off to
save current.
Clock out
with oscillator
frequency
divided by 4.
External clock mode with OSC2/CLKO configured
with oscillator frequency divided by 4.
OSC1/CLKI is hi-impedance and can be driven
by CMOS drivers.
011 RC Zero Gain.
Device
turned off to
save current.
Clock out
with oscillator
frequency
divided by 4.
Inexpensive solution for device oscillation.
Most variation in timebase.
CLKOUT is enabled on OSC2/CLKO with oscillator
frequency divided by 4.
010 HS High Gain — High frequency application.
Oscillator circuit’s mode consumes the most
current of the three crystal modes.
001 XT Medium Gain — Standard crystal/resonator frequency.
000 LP Low Gain — Low power/frequency applications.
Oscillator circuit’s mode consumes the least
current of the three crystal modes.
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PIC18C Reference Manual
DS39502A-page 2-6 2000 Microchip Technology Inc.
2.4 Crystal Oscillators/Ceramic Resonators
In XT, LP, HS and HS4 modes, a crystal or ceramic resonator is connected to the OSC1 and
OSC2 pins to establish oscillation (Figure2-2). The PIC18CXXX oscillator design requires the
use of a parallel cut crystal. Using a series cut crystal may give a frequency out of the crystal
manufacturer’s specifications. When in EC and ECIO mode, the device can have an external
clock source drive the OSC1 pin (Figure2-3).
See Table 3-1 in the “Reset” section for time-out delays associated with crystal oscillators.
Figure 2-2: Crystal or Ceramic Resonator Operation (HS4, HS, XT or LP Oscillator
Mode)
Figure 2-3: External Clock Input Operation (EC or ECIO Oscillator Modes)
C1 (3)
C2 (3)
XTAL
OSC2
RS (1)
OSC1
RF (2) SLEEP
To internal logic
PIC18CXXX
Note 1: A series resistor, Rs, may be required for AT strip cut crystals.
2: The internal feedback resistor, RF, is typically in the range of 2 to 10 MΩ.
3: See Table 2-2 and 2-3 for example values of C1 and C2.
CLKI
Open CLKO
Clock from
ext. system PIC18CXXX
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2000 Microchip Technology Inc. DS39502A-page 2-7
Section 2. Oscillator
Oscillator
2
2.4.1 Oscillator/Resonator Start-up
As the device voltage increases from VSS, the oscillator will start its oscillations. The time
required for the oscillator to start oscillating depends on many factors. These include:
• Crystal/resonator frequency
• Capacitor values used (C1 and C2 in Figure2-2)
• Device VDD rise time
• System temperature
• Series resistor value and type if used (Rs in Figure2-2)
• Oscillator mode selection of device (selects the gain of the internal oscillator inverter)
• Crystal quality
• Oscillator circuit layout
• System noise
Figure2-4 graphs an example oscillator/resonator start-up. The peak-to-peak voltage of the oscillator
waveform can be quite low (less than 50% of device VDD), when the waveform is centered
at VDD/2 (refer to parameters D033 and D043 in the “Electrical Specifications” section).
Figure 2-4: Example Oscillator/Resonator Start-up Characteristics
Voltage
Crystal Start-up Time
Time
Device VDD
Maximum VDD of System
0V
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PIC18C Reference Manual
DS39502A-page 2-8 2000 Microchip Technology Inc.
2.4.2 Component Selection
Figure2-2 is a diagram of the device’s crystal or ceramic resonator circuitry. The resistance for
the feedback resistor, RF, is typically within the 2 to 10 MΩ range. This varies with device voltage,
temperature and process variations. A series resistor, Rs, may be required if an AT strip cut crystal
is used. Be sure to include the device’s operating voltage and the device’s manufacturing process
when determining resistor requirements. As you can see in Figure2-2, the connection to the
device’s internal logic is device dependent. See the applicable data sheet for device specifics.
The typical values of capacitors (C1, C2) are given in Table 2-2 and Table 2-3. Each device’s data
sheet will give the specific values that we test to at Microchip.
Table 2-2: Example Capacitor Selection for Ceramic Resonators
Ranges tested:
Mode Frequency C1 (1) C2 (1)
XT 455 kHz
2.0 MHz
4.0 MHz
TBD
TBD
TBD
TBD
TBD
TBD
HS 8.0 MHz
16.0 MHz
TBD
TBD
TBD
TBD
Resonators used:
Frequency Manufacturer Tolerance
455 kHz Panasonic EFO-A455K04B ±0.3%
2.0 MHz Murata Erie CSA2.00MG ±0.5%
4.0 MHz Murata Erie CSA4.00MG ±0.5%
8.0 MHz Murata Erie CSA8.00MT ±0.5%
16.0 MHz Murata Erie CSA16.00MX ±0.5%
Note 1: Recommended values of C1 and C2 are identical to the ranges tested above.
Higher capacitance increases the stability of the oscillator but also increases the
start-up time. These values are for design guidance only. Since each resonator has
its own characteristics, the user should consult the resonator manufacturer for appropriate
values of external components or verify oscillator performance.
2: All resonators tested required external capacitors.
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2000 Microchip Technology Inc. DS39502A-page 2-9
Section 2. Oscillator
Oscillator
2
Table 2-3: Example Capacitor Selection for Crystal Oscillator
Mode Frequency C1 (1) C2 (1)
LP 32 kHz
200 kHz
TBD
TBD
TBD
TBD
XT 200 kHz
1 MHz
4 MHz
TBD
TBD
TBD
TBD
TBD
TBD
HS 4.0 MHz
8 MHz
20 MHz
25 MHz
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
Crystals used:
Frequency Manufacturer Tolerance
32.0 kHz Epson C-001R32.768K-A ± 20 PPM
200 kHz STD XTL 200.000 kHz ± 20 PPM
1.0 MHz ECS ECS-10-13-1 ± 50 PPM
4.0 MHz ECS ECS-40-20-1 ± 50 PPM
8.0 MHz EPSON CA-301 8.000 M-C ± 30 PPM
20.0 MHz EPSON CA-301 20.000 M-C ± 30 PPM
Note 1: Higher capacitance increases the stability of the oscillator, but also increases the
start-up time. These values are for design guidance only. A series resistor, Rs, may
be required in HS mode, as well as XT mode, to avoid overdriving crystals with low
drive level specification. Since each crystal has its own characteristics, the user
should consult the crystal manufacturer for appropriate values of external components
or verify oscillator performance.
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PIC18C Reference Manual
DS39502A-page 2-10 2000 Microchip Technology Inc.
2.4.3 Tuning the Oscillator Circuit
Since Microchip devices have wide operating ranges (frequency, voltage, and temperature;
depending on the part and version ordered) and external components (crystals, capacitors,...) of
varying quality and manufacture, validation of operation needs to be performed to ensure that
the component selection will comply with the requirements of the application.
There are many factors that go into the selection and arrangement of these external components.
These factors include:
• amplifier gain
• desired frequency
• resonant frequency(s) of the crystal
• temperature of operation
• supply voltage range
• start-up time
• stability
• crystal life
• power consumption
• simplification of the circuit
• use of standard components
• combination which results in fewest components
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2000 Microchip Technology Inc. DS39502A-page 2-11
Section 2. Oscillator
Oscillator
2
2.4.3.1 Determining Best Values for Crystals, Clock Mode, C1, C2, and Rs
The best method for selecting components is to apply a little knowledge and a lot of trial, measurement,
and testing.
Crystals are usually selected by their parallel resonant frequency only, however other parameters
may be important to your design, such as temperature or frequency tolerance. Application
Note AN588 is an excellent reference if you would like to know more about crystal operation and
their ordering information.
The PICmicro’s internal oscillator circuit is a parallel oscillator circuit, which requires that a parallel
resonant crystal be selected. The load capacitance is usually specified in the 20 pF to 32 pF
range. The crystal will oscillate closest to the desired frequency with capacitance in this range. It
may be necessary to sometimes alter these values a bit, as described later, in order to achieve
other benefits.
Clock mode is primarily chosen by using the FOSC parameter specification (parameter 1A) in the
device data sheet, based on frequency. Clock modes (except RC and EC) are simply gain selections;
lower gain for lower frequencies, higher gain for higher frequencies. It is possible to select
a higher or lower gain, if desired, based on the specific needs of the oscillator circuit.
C1 and C2 should also be initially selected based on the load capacitance as suggested by the
crystal manufacturer and the tables supplied in the device data sheet. The values given in the
device data sheet can only be used as a starting point, since the crystal manufacturer, supply
voltage, and other factors already mentioned may cause your circuit to differ from the one used
in the factory characterization process.
Ideally, the capacitance is chosen so that it will oscillate at the highest temperature and lowest
VDD that the circuit will be expected to perform under. High temperature and low VDD both have
a limiting effect on the loop gain, such that if the circuit functions at these extremes, the designer
can be more assured of proper operation at other temperatures and supply voltage combinations.
The output sine wave should not be clipped in the highest gain environment (highest VDD
and lowest temperature) and the sine output amplitude should be great enough in the lowest gain
environment (lowest VDD and highest temperature) to cover the logic input requirements of the
clock as listed in the device data sheet.
A method for improving start-up is to use a value of C2 greater than C1. This causes a greater
phase shift across the crystal at power-up, which speeds oscillator start-up.
Besides loading the crystal for proper frequency response, these capacitors can have the effect
of lowering loop gain if their value is increased. C2 can be selected to affect the overall gain of
the circuit. A higher C2 can lower the gain if the crystal is being over driven (see also discussion
on Rs). Capacitance values that are too high can store and dump too much current through the
crystal, so C1 and C2 should not become excessively large. Unfortunately, measuring the wattage
through a crystal is tricky business, but if you do not stray too far from the suggested values,
you should not have to be concerned with this.
A series resistor, Rs, is added to the circuit if, after all other external components are selected to
satisfaction, the crystal is still being overdriven. This can be determined by looking at the OSC2
pin, which is the driven pin, with an oscilloscope. Connecting the probe to the OSC1 pin will load
the pin too much and negatively affect performance. Remember that a scope probe adds its own
capacitance to the circuit, so this may have to be accounted for in your design, (i.e. if the circuit
worked best with a C2 of 20 pF and scope probe was 10 pF, a 30 pF capacitor may actually be
called for). The output signal should not be clipping or squashed. Overdriving the crystal can also
lead to the circuit jumping to a higher harmonic level or even crystal damage.
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PIC18C Reference Manual
DS39502A-page 2-12 2000 Microchip Technology Inc.
The OSC2 signal should be a clean sine wave that easily spans the input minimum and maximum
of the clock input pin (4V to 5V peak to peak for a 5V VDD is usually good). An easy way to
set this is to again test the circuit at the minimum temperature and maximum VDD that the design
will be expected to perform in, then look at the output. This should be the maximum amplitude of
the clock output. If there is clipping or the sine wave is squashing near VDD and VSS at the top
and bottom, increasing load capacitors will risk too much current through the crystal or push the
value too far from the manufacturer’s load specification. Add a trimpot between the output pin
and C2, and adjust it until the sine wave is clean. Keeping it fairly close to maximum amplitude
at the low temperature and high VDD combination will assure this is the maximum amplitude the
crystal will see and prevent overdriving. A series resistor, Rs, of the closest standard value can
now be inserted in place of the trimpot. If Rs is too high, perhaps more than 20k ohms, the input
will be too isolated from the output, making the clock more susceptible to noise. If you find a value
this high is needed to prevent overdriving the crystal, try increasing C2 to compensate. Try to get
a combination where Rs is around 10k or less and load capacitance is not too far from the 20 pF
or 32 pF manufacturer specification.
2.4.3.1.1 Start-up
The most difficult time for the oscillator to start-up is when waking up from sleep. This is because
the load capacitors have both partially charged to some quiescent value, and phase differential
at wake-up is minimal. Thus, more time is required to achieve stable oscillation. Remember also
that low voltage, high temperatures and the lower frequency clock modes also impose limitations
on loop gain, which in turn affects start-up. Each of the following factors makes the start-up time
worse:
• a low frequency design (with its low gain clock mode)
• a quiet environment (such as a battery operated device)
• operating in a shielded box (away from the noisy RF area)
• low voltage
• high temperature
• waking up from sleep.
Noise actually helps a design for oscillator start-up, since it helps “kick start” the oscillator.
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2000 Microchip Technology Inc. DS39502A-page 2-13
Section 2. Oscillator
Oscillator
2
2.4.4 External Clock Input
Two of the oscillator modes use an external clock. These modes are EC and ECIO oscillator
modes.
In the EC mode (Figure2-5), the OSC1 pin can be driven by CMOS drivers. In this mode, the
OSC1/CLKI pin is hi-impedance and the OSC2/CLKO pin is the CLKO output (FOSC/4). The output
is at a frequency of the selected oscillator divided by 4. This output clock is useful for testing
or synchronization purposes. If the power-up timer is disabled, then there is no time-out after a
POR, or else there will be a power-up timer. There is always a power-up time after a brown-out
reset.
The feedback device between OSC1 and OSC2 is turned off to save current. There is no oscillator
start-up time required after wake-up from sleep mode. If the power-up timer is disabled,
then there is no time-out after a POR, or else (power-up timer enabled) there will be a power-up
timer delay after POR. There is always a power-up timer after a brown-out reset.
Figure 2-5: External Clock Input Operation (EC Oscillator Configuration)
In the ECIO mode (Figure2-6), the OSC1 pin can be driven by CMOS drivers. In this mode, the
OSC1/CLKI pin is hi-impedance and the OSC2/CLKO is now multiplexed with a general purpose
I/O pin.
The feedback device between OSC1 and OSC2 is turned off to save current. There is no oscillator
start-up time required after wake-up from sleep mode. If the power-up timer is disabled,
then there is no time-out after a POR, or else (power-up timer enabled) there will be a power-up
timer delay after POR. There is always a power-up timer after a brown-out reset.
Figure 2-6: External Clock Input Operation (ECIO Oscillator Configuration)
OSC1
FOSC/4 OSC2
Clock from
ext. system PIC18CXXX
CLKI
IO pin I/O (CLKO)
Clock from
ext. system PIC18CXXX
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PIC18C Reference Manual
DS39502A-page 2-14 2000 Microchip Technology Inc.
2.4.5 External Crystal Oscillator Circuit for Device Clock
Sometimes more than one device needs to be clocked from a single crystal. Since Microchip
does not recommend connecting other logic to the PICmicro’s internal oscillator circuit, an external
crystal oscillator circuit is recommended. Each device will then have an external clock source,
and the number of devices that can be driven will depend on the buffer drive capability. This circuit
is also useful when more than one device needs to operate synchronously to each other.
Either a prepackaged oscillator can be used or a simple oscillator circuit with TTL gates can be
built. Prepackaged oscillators provide a wide operating range and better stability. A
well-designed crystal oscillator will provide good performance with TTL gates. Two types of crystal
oscillator circuits can be used; one with series resonance or one with parallel resonance.
Figure2-7 shows implementation of an external parallel resonant oscillator circuit. The circuit is
designed to use the fundamental frequency of the crystal. The 74AS04 inverter performs the
180-degree phase shift that a parallel oscillator requires. The 4.7 kΩ resistor affects the circuit in
three ways:
1. Provides negative feedback.
2. Biases the 74AS04 (#1) into the linear region.
3. Bounds the gain of the amplifier.
The 10 kΩ potentiometer is used to prevent overdriving of the crystal. It dissipates the power of
the amplifier and allows the requirements of the crystal to be met.
Figure 2-7: External Parallel Resonant Crystal Oscillator Circuit
Figure2-8 shows an external series resonant oscillator circuit. This circuit is also designed to use
the fundamental frequency of the crystal. The inverter performs a 180-degree phase shift in a
series resonant oscillator circuit. The 330 kΩ resistors provide the negative feedback to bias the
inverters in their linear region.
Figure 2-8: External Series Resonant Crystal Oscillator Circuit
When the device is clocked from an external clock source (as in Figure2-7 or Figure2-8) then the
microcontroller’s oscillator should be configured for EC or ECIO mode (Figure2-3).
20 pF
+5V
20 pF
10kΩ
4.7 kΩ
10 kΩ
74AS04
XTAL
10 kΩ
74AS04
CLKI
To Other
Devices
PIC18CXXX
(#1)
(#2)
330 kΩ
74AS04 74AS04 PIC18CXXX
CLKI
To Other
Devices
XTAL
330 kΩ
74AS04
0.1 µF
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2000 Microchip Technology Inc. DS39502A-page 2-15
Section 2. Oscillator
Oscillator
2
2.5 External RC Oscillator
For timing insensitive applications, the RC and RCIO device options offer additional cost savings.
The RC oscillator frequency is a function of the:
• Supply voltage
• External resistor (REXT) values
• External capacitor (CEXT) values
• Operating temperature
In addition to this, the oscillator frequency will vary from unit to unit due to normal process parameter
variation. Furthermore, the difference in lead frame capacitance between package types will
also affect the oscillation frequency, especially for low CEXT values. The user also needs to take
into account variation due to tolerance of external REXT and CEXT components used. Figure2-9
shows how the RC combination is connected. For REXT values below 2.2 kΩ, oscillator operation
may become unstable, or stop completely. For very high REXT values (e.g. 1 MΩ), the oscillator
becomes sensitive to noise, humidity and leakage. Thus, we recommend keeping REXT between
3 kΩ and 100 kΩ.
Figure 2-9: RC Oscillator Mode
Although the oscillator will operate with no external capacitor (CEXT = 0 pF), we recommend
using values above 20 pF for noise and stability reasons. With no or a small external capacitance,
the oscillation frequency can vary dramatically due to changes in external capacitances,
such as PCB trace capacitance and package lead frame capacitance.
See characterization data for RC frequency variation from part to part due to normal process variation.
The variation is larger for larger resistance (since leakage current variation will affect RC
frequency more for large R) and for smaller capacitance (since variation of input capacitance will
affect RC frequency more).
See characterization data for the variation of oscillator frequency due to VDD for given REXT/CEXT
values, as well as frequency variation due to operating temperature for given REXT, CEXT and
VDD values.
The oscillator frequency, divided by 4, is available on the OSC2/CLKO pin, and can be used for
test purposes or to synchronize other logic (see Figure 4-3: "Clock/Instruction Cycle" in the
“Architecture” section, for waveform).
OSC2/CLKO
CEXT
VDD
REXT
VSS
PIC18CXXX
OSC1
FOSC/4 (1)
Internal
Clock FOSC
Note 1: This output may also be configured as a general purpose I/O pin.
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DS39502A-page 2-16 2000 Microchip Technology Inc.
2.5.1 RC Oscillator with I/O Enabled
The RCIO oscillator mode functions in the exact same manner as the RC oscillator mode. The
only difference is that OSC2 pin does not output oscillator frequency divided by 4, but in this
mode is configured as an I/O pin.
As in the RC mode, the user needs to take into account any variation of the clock frequency due
to tolerance of external REXT and CEXT components used, process variation, voltage, and temperature.
Figure2-10 shows how the RC with the I/O pin combination is connected.
Figure 2-10: RCIO Oscillator Mode
I/O (OSC2)
CEXT
REXT
VSS PIC18CXXX
OSC1 Internal
Clock
VDD
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2000 Microchip Technology Inc. DS39502A-page 2-17
Section 2. Oscillator
Oscillator
2
2.5.2 RC Start-up
As the device voltage increases, the RC will start its oscillations immediately after the pin voltage
levels meet the input threshold specifications (parameters D032 and D042 in the “Electrical
Specifications” section). The time required for the RC to start oscillating depends on many factors.
These include:
• Resistor value used
• Capacitor value used
• Device VDD rise time
• System temperature
There is no oscillator start-up time (TOST) regardless of the source of reset or when sleep is terminated.
If the power-up timer is disabled, then there is no time-out after a POR, or else
(power-up timer enabled) there will be a power-up timer delay after POR. There is always a
power-up time after a brown-out reset.
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DS39502A-page 2-18 2000 Microchip Technology Inc.
2.6 HS4 (HS oscillator with 4xPLL enabled)
A Phase Locked Loop (PLL) circuit is provided as a programmable option for users that want to
multiply the frequency of the incoming crystal oscillator signal by 4. For an input clock frequency
of 10 MHz, the internal clock frequency will be multiplied to 40 MHz. This is useful for customers
who are concerned with EMI due to high frequency crystals.
The PLL can only be enabled when the oscillator configuration bits are programmed for HS4
mode (FOSC2:FOSC0 = ‘110’). If they are programmed for any other mode, the PLL is not
enabled and the system clock will come directly from OSC1. The oscillator mode is specified
during device programming.
The PLL is divided into four basic parts (see Figure2-11):
• Phase comparator
• Loop filter
• VCO (Voltage Controlled Oscillator)
• Feedback divider
When in HS4 mode, the incoming clock is sampled by the phase comparator and is compared
to PLL output clock divided by four. If the two are not in phase, the phase comparator drives an
input to the loop filter to "pump" the voltage to the VCO, either up or down, depending upon
whether the input clock was leading or lagging the output clock. This process continues until the
incoming clock on OSC1 and the divide by 4 output clock of the VCO are in phase. The output
clock is now "locked" in phase with the incoming clock, and its frequency is four times greater.
A PLL lock timer is used to ensure that the PLL has locked before device execution starts. The
PLL lock timer has a time-out that is called TPLL. This delay is shown in Figure2-14.
Figure 2-11: PLL Block Diagram
MUX
VCO
Loop
Filter
Divide by 4
Crystal
Oscillator
OSC2
OSC1
SYSCLK
Phase
Comparator
CVCO
Circuitry
FOSC2:FOSC0 = ‘110’
PIC18CXXX
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2000 Microchip Technology Inc. DS39502A-page 2-19
Section 2. Oscillator
Oscillator
2
2.7 Switching to Low Power Clock Source
This feature allows the clock source to switch from the default clock source that is selected by
the FOSC2:FOSC0 bits to the Timer1 oscillator clock source. The availability of this feature is
device dependent.
2.7.1 Switching Oscillator Mode Option
This feature is enabled by clearing the Oscillator System Clock Switch Enable (OSCSEN) configuration
bit. This provides the ability to switch to a low power execution mode if the alternate
clock source (such as Timer1) is configured in oscillator mode with a low frequency (32 kHz, for
example) crystal.
The enabling of the low power clock source is determined by the state of the SCS control bit in
the Oscillator control register (OSCCON). (Register 2-1)
2.7.1.2 System Clock Switch Bit
The system clock switch bit, SCS (OSCCON) controls the switching of the oscillator source. It
can be configured for either the Timer1 Oscillator clock source, or the default clock source
(selected by the Fosc2:Fosc0 bits). When the SCS bit is set, it enables the Timer1 Oscillator
clock source as the system clock. When the SCS bit is cleared, the system clock comes from
the clock source specified by the Fosc2:Fosc0 bits. The SCS bit is cleared on all forms of reset.
Note: The Timer1 oscillator must be enabled in order to switch the system clock source.
The Timer1 oscillator is enabled by setting the T1OSCEN bit in the Timer1 Control
Register (T1CON). If the Timer1 oscillator is not enabled, then any write to the SCS
bit will be ignored, and the SCS bit will remain in the default state with the clock
source coming from OSC1 or the PLL output.
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PIC18C Reference Manual
DS39502A-page 2-20 2000 Microchip Technology Inc.
2.7.2 Oscillator Transitions
Switching from the default clock to the Timer1 Oscillator clock source is controlled as shown in
the flow diagram (Figure2-16). This ensures a clean transition when switching oscillator clocks.
Circuitry is used to prevent "glitches" due to transitions when switching from the default clock
source to the low power clock source and vice versa. Essentially, the circuitry waits for eight rising
edges of the clock input to which the processor is switching. This ensures that the clock output
pulse width will not be less than the shortest pulse width of the two clock sources. No additional
delays are required when switching from the default clock source to the low power clock source.
Figure2-12 through Figure2-15 show different transition waveforms when switching between the
oscillators.
Figure 2-12: Transition From OSC1 to Timer1 Oscillator Waveform
Figure 2-13: Transition Between Timer1 and OSC1 Waveform (HS, XT, LP)
Q2 Q3 Q4 Q1 Q2 Q3
OSC1
Internal
SCS
Program PC PC + 2
Note 1: Delay on internal system clock is eight oscillator cycles for synchronization.
2: The T1OSCEN bit is set.
3: The OSCSEN configuration bit is cleared.
Q1
T1OSI (2)
Q4 Q1
PC + 4
Q1
Tscs
Clock
Counter
System
Q2 Q3 Q4 Q1
TDLY
TT1P
TOSC
1 34 5678 2
(OSCCON)
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3
OSC1
Internal
SCS
(OSCCON)
Program PC PC + 2
Note 1: TOST = 1024TOSC (drawing not to scale).
T1OSI
OSC2
TOST
Q1
PC + 6
TT1P
TOSC
TSCS
1 2 34 567 8
System Clock
Counter
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2000 Microchip Technology Inc. DS39502A-page 2-21
Section 2. Oscillator
Oscillator
2
Figure 2-14: Transition Between Timer1 and OSC1 Waveform (HS4)
Figure 2-15: Transition Between Timer1 and OSC1 Waveform (RC, EC, ECIO)
Additional delays may occur before switching from the low power clock source back to the main
oscillator. The sequence of events that take place will depend upon the main oscillator setting in
the configuration register (the mode of the main oscillator).
If the main oscillator is configured as a RC oscillator (RC, RCIO) or External Clock (EC, ECIO),
then there is no oscillator start-up time. The transition from a low power clock to the main oscillator
occurs after 8 clock cycles are counted on OSC1.
If the main oscillator is configured as a crystal (HS4, HS, XT or LP), then the transition will take
place after an oscillator start-up time (TOST).
If the main oscillator is configured as a crystal with PLL (HS4) enabled, then the transition will
take place after an oscillator start-up time (TOST) plus an additional PLL time-out, TPLL (see
“Electrical Specifications” section, parameter 32). This is necessary because the crystal oscillator
had been powered down until the time of the transition. In order to provide the system with
a reliable clock when the change-over has occurred, the clock will not be released to the
change-over circuit until the oscillator start-up time has expired. The additional TPLL time is
required after oscillator start-up to allow the phase lock loop ample time to lock to the incoming
oscillator frequency from OSC1.
Q4 Q1 Q1 Q2 Q3 Q4 Q1 Q2
OSC1
SCS
(OSCCON)
Program PC PC + 2
Note 1: TOST = 1024TOSC (drawing not to scale).
T1OSI
TOST
Q3
PC + 4
TPLL
TOSC
TT1P
TSCS
Q4
OSC2
PLL Clock
Input 1 234 5678
Internal
System Clock
Counter
Q3 Q4 Q1 Q1 Q2 Q3 Q4 Q1 Q2 Q3
OSC1
SCS
(OSCCON)
PC PC + 2
Note 1: RC oscillator mode assumed.
PC + 4
T1OSI
OSC2
Q4 TT1P
TOSC
TSCS
1 2 3 4 5 6 7 8
Program
Counter
Internal
System Clock
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PIC18C Reference Manual
DS39502A-page 2-22 2000 Microchip Technology Inc.
A flow diagram for switching between a low power clock and the default oscillator clock is shown
in Figure2-16.
Figure 2-16: Switching Oscillator Flow Diagram
Start
SCS = 0?
Has SCS
Begin switch to
low power clock
N = 0,
hold CPU clock
Transition
on Newclk?
N=N+1
N = 8?
Sysclk = Newclk,
Release Q clocks
Begin switch to
high speed clock
FOSC2:FOSC0 =
XT, LP,
Start OST,
wait 1024
oscillations
on OSC1
Newclk =
XT, HS, LP
FOSC2:FOSC0 =
HS4
Newclk =
HS4
Newclk =
T1OSC input
Newclk = EC or RC
Start OST,
wait 1024
oscillations
on OSC1
Yes
Yes Yes
Yes
Yes
No
No No
No
No
T1OSCEN = 1?
Yes
No No switch to low
power clock.
Set SCS = 0
End
End
changed state?
Wait TPLL for
PLL to lock
in Q1 state
OSCSEN = 0?
No
Yes
End
No switch to low
power clock
or HS?
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2000 Microchip Technology Inc. DS39502A-page 2-23
Section 2. Oscillator
Oscillator
2
2.8 Effects of Sleep Mode on the On-Chip Oscillator
When the device executes a SLEEP instruction, the on-chip clocks and oscillator are turned off
and the device is held at the beginning of an instruction cycle (Q1 state). With the oscillator off,
the OSC1 and OSC2 signals will stop oscillating. Since all the transistor switching currents have
been removed, SLEEP mode achieves the lowest current consumption of the device (only leakage
currents). Enabling any on-chip feature that will operate during SLEEP will increase the current
consumed. The user can wake from SLEEP through external reset, Watchdog Timer Reset
or through an interrupt.
See Table 3-1 in the “Reset” section for time-outs due to SLEEP and MCLR reset.
Table 2-4: OSC1 and OSC2 Pin States in Sleep Mode
2.9 Effects of Device Reset on the On-Chip Oscillator
Device resets have no effect on the on-chip crystal oscillator circuitry. The oscillator will continue
to operate as it does under normal execution. While in RESET, the device logic is held at the
Q1 state so that when the device exits RESET, it is at the beginning of an instruction cycle. The
OSC2 pin, when used as the external clockout (RC, EC mode), will be held low during RESET,
and as soon as the MCLR pin is at VIH (input high voltage), the RC will start to oscillate.
See Table 3-1 in the “Reset” section for time-outs due to SLEEP and MCLR reset.
2.9.1 Power-up Delays
Power-up delays are controlled by two timers, so that no external reset circuitry is required for
most applications. The delays ensure that the device is kept in RESET until the device power
supply and clock are stable. For additional information on RESET operation, see the “Reset”
section.
The Power-up Timer (PWRT) provides a fixed 72 ms delay on power-up due to POR or BOR,
and keeps the part in RESET until the device power supply is stable. When a crystal is used (LP,
XT, HS), the Oscillator Start-Up Timer (OST) keeps the chip in RESET until the PWRT timer
delay has expired, allowing the crystal oscillator to stabilize on power up. The PWRTEN bit must
be cleared for this time-out to occur.
When the PLL is enabled (HS4 oscillator mode), the Power-up Timer (PWRT) is used to keep
the device in RESET for an extra nominal delay (TPLL) above crystal mode. This delay ensures
that the PLL is locked to the crystal frequency.
For additional information on RESET operation, see the “Reset” section.
OSC Mode OSC1 Pin OSC2 Pin
RC Floating, external resistor should
pull high
At logic low
RCIO Floating, external resistor should
pull high Configured as I/O pin
ECIO Floating Configured as I/O pin
EC Floating At logic low
LP, XT and HS Feedback inverter disabled at
quiescent voltage level
Feedback inverter disabled at
quiescent voltage level
HS4 Feedback inverter disabled at
quiescent voltage level
Feedback inverter disabled at
quiescent voltage level
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DS39502A-page 2-24 2000 Microchip Technology Inc.
2.10 Design Tips
Question 1: When looking at the OSC2 pin after power-up with an oscilloscope, there is
no clock. What can cause this?
Answer 1:
1. Executing a SLEEP instruction with no source for wake-up (such as, WDT, MCLR, or an
Interrupt). Verify that the code does not put the device to SLEEP without providing for
wake-up. If it is possible, try waking it up with a low pulse on MCLR. Powering up with
MCLR held low will also give the crystal oscillator more time to start-up, but the Program
Counter will not advance until the MCLR pin is high.
2. The wrong clock mode is selected for the desired frequency. For a blank device, the
default oscillator is RCIO. Most parts come with the clock selected in the default RC mode,
which will not start oscillation with a crystal or resonator. Verify that the clock mode has
been programmed correctly.
3. The proper power-up sequence has not been followed. If a CMOS part is powered through
an I/O pin prior to power-up, bad things can happen (latch up, improper start-up, etc.) It is
also possible for brown-out conditions, noisy power lines at start-up, and slow VDD rise
times to cause problems. Try powering up the device with nothing connected to the I/O,
and power-up with a known, good, fast-rise, power supply. Refer to the power-up information
in the device data sheet for considerations on brown-out and power-up sequences.
4. The C1 and C2 capacitors attached to the crystal have not been connected properly or
are not the correct values. Make sure all connections are correct. The device data sheet
values for these components will usually get the oscillator running; however, they just
might not be the optimal values for your design.
Question 2: The PICmicro device starts, but runs at a frequency much higher than the
resonant frequency of the crystal.
Answer 2:
The gain is too high for this oscillator circuit. Refer to subsection 2.4 “Crystal Oscillators/Ceramic
Resonators” to aid in the selection of C2 (may need to be higher) Rs (may be
needed) and clock mode (wrong mode may be selected). This is especially possible for low frequency
crystals, like the common 32.768 kHz.
Question 3: The design runs fine, but the frequency is slightly off. What can be done to
adjust this?
Answer 3:
Changing the value of C1 has some effect on the oscillator frequency. If a SERIES resonant crystal
is used, it will resonate at a different frequency than a PARALLEL resonant crystal of the same
frequency call-out. Ensure that you are using a PARALLEL resonant crystal.
Question 4: The board works fine, then suddenly quits or loses time.
Answer 4:
Other than the obvious software checks that should be done to investigate losing time, it is possible
that the amplitude of the oscillator output is not high enough to reliably trigger the oscillator
input. Look at the C1 and C2 values and ensure that the the device configuration bits are correct
for the desired oscillator mode.
Question 5: If I put an oscilloscope probe on an oscillator pin, I don’t see what I expect.
Why?
Answer 5:
Remember that an oscilloscope probe has capacitance. Connecting the probe to the oscillator
circuitry will modify the oscillator characteristics. Consider using a low capacitance (active)
probe.
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2000 Microchip Technology Inc. DS39502A-page 2-25
Section 2. Oscillator
Oscillator
2
2.11 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced MCU family (that is they may be written
for the Base-Line, Mid-Range, or High-End families), but the concepts are pertinent, and
could be used (with modification and possible limitations). The current application notes related
to the oscillator are:
Title Application Note #
PICmicro Microcontrollers Oscillator Design Guide AN588
Low Power Design using PICmicro Microcontrollers AN606
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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DS39502A-page 2-26 2000 Microchip Technology Inc.
2.12 Revision History
Revision A
This is the initial released revision of the Enhanced MCU oscillators description.
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2000 Microchip Technology Inc. DS39503A-page 3-1
Reset
3
Section 3. Reset
HIGHLIGHTS
This section of the manual contains the following major topics:
3.1 Introduction .................................................................................................................... 3-2
3.2 Resets and Delay Timers............................................................................................... 3-4
3.3 Registers and Status Bit Values................................................................................... 3-14
3.4 Design Tips.................................................................................................................. 3-20
3.5 Related Application Notes............................................................................................ 3-21
3.6 Revision History........................................................................................................... 3-22
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3.1 Introduction
The reset logic is used to place the device into a known state. The source of the reset can be
determined by reading the device status bits. The reset logic is designed with features that
reduce system cost and increase system reliability.
Devices differentiate between various kinds of reset:
a) Power-on Reset (POR)
b) MCLR Reset during normal operation
c) MCLR Reset during SLEEP
d) WDT Reset (normal operation)
e) Programmable Brown-out Reset (BOR)
f) RESET Instruction
g) Stack Overflow Reset
h) Stack Underflow Reset
Most registers are unaffected by a reset; their status is unknown on POR and unchanged by all
other resets. The other registers are forced to a “reset state” on Power-on Reset, MCLR, WDT
Reset, Brown-out Reset, MCLR Reset during SLEEP and by the RESET instruction.
Most registers are not affected by a WDT wake-up, since this is viewed as the resumption of normal
operation. Status bits from the RCON register, RI, TO, PD, POR and BOR are set or cleared
differently in different reset situations as indicated in Table 3-3. These bits are used in software
to determine the nature of the reset. See Table 3-4 for a full description of the reset states of all
registers.
A simplified block diagram of the on-chip reset circuit is shown in Figure 3-1. This block diagram
is a superset of reset features. To determine the features that are available on a specific device,
please refer to the device’s Data Sheet.
Note: While the Enhanced MCU is in a reset state, the internal phase clock is held at Q1
(beginning of an instruction cycle).
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Section 3. Reset
Reset
3
Figure 3-1: Simplified Block Diagram of On-chip Reset Circuit
S
R Q
External Reset
MCLR
VDD
OSC1
WDT
Module
OST/PWRT
On-chip (1)
RC OSC
WDT
Time-out
Power-on Reset
OST
10-bit Ripple counter
PWRT
Chip_Reset
10-bit Ripple counter
Reset
Enable OSTT (2)
Enable PWRT
SLEEP
Note 1: This is a separate oscillator from the RC oscillator of the CLKIN pin.
2: See Table 3-1 for time-out situations.
Brown-out
Reset BOREN
RESET
Instruction
Stack
Pointer Stack Overflow/Underflow Reset
VDD rise
detect
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3.2 Resets and Delay Timers
The device has many sources for a device reset. Depending on the source of the reset, different
delays may be initiated. These reset sources and the delays are discussed in the following subsections.
3.2.1 Power-on Reset (POR)
A Power-on Reset pulse is generated on-chip when VDD rise is detected. To take advantage of
the POR, just tie the MCLR pin directly (or through a resistor) to VDD as shown in Figure 3-2. This
will eliminate external RC components usually needed to create a Power-on Reset delay. A minimum
rise time for VDD is required. See parameter D003 and parameter D004 in the “Electrical
Specifications” section for details.
Figure 3-2: Using On-Chip POR
When the device exits the reset condition (begins normal operation), the device operating parameters
(voltage, frequency, temperature, etc.) must be within their operating ranges, otherwise the
device will not function correctly. Ensure the delay is long enough to get all operating parameters
within specification.
Figure 3-3 shows a possible POR circuit for a slow power supply ramp up. The external Power-on
Reset circuit is only required if the device would exit reset before the device VDD is in the valid
operating range. The diode, D, helps discharge the capacitor quickly when VDD powers down.
Figure 3-3: External Power-on Reset Circuit (For Slow VDD Power-up)
VDD
MCLR
PIC18CXXX
VDD
R (1)
Note 1: The resistor is optional.
VDD VDD
Note 1: R < 40 kΩ is recommended to ensure that the voltage drop across R does not violate
the device’s electrical specification.
2: R1 = 100Ω to 1 kΩ will limit any current flowing into MCLR from external capacitor
C in the event of MCLR/VPP pin breakdown due to Electrostatic Discharge (ESD)
or Electrical Overstress (EOS).
C
R1
D R
MCLR
PIC18CXXX
2000 Microchip Technology Inc. DS39503A-page 3-5
Section 3. Reset
Reset
3
3.2.2 Power-up Timer (PWRT)
The Power-up Timer provides a delay on Power-on Reset (POR) or Brown-out Reset (BOR).
See parameter D033 in the ““Electrical Specifications” section. The Power-up Timer operates
on a dedicated internal RC oscillator. The device is kept in reset as long as the PWRT is active.
The PWRT delay allows VDD to rise to an acceptable level. A configuration bit (PWRTEN) is provided
to enable/disable the Power-up Timer.
The power-up time delay will vary from device to device due to VDD, temperature and process
variations. See DC parameters for details.
3.2.3 Oscillator Start-up Timer (OST)
The Oscillator Start-Up Timer (OST) provides a 1024 oscillator cycle delay (from OSC1 input)
(parameter 32) after the PWRT delay is over. This ensures that the crystal oscillator or resonator
has started and is stable.
The OST time-out is invoked only for XT, LP and HS modes, on Power-on Reset, Brown-out
Reset, wake-up from SLEEP, or on a transition from Timer1 input clock as the system clock to
the oscillator as the system clock by clearing the SCS bit. The oscillator start-up timer is disabled
for all resets and wake-ups in RC and EC modes. (See Table 3-1)
The OST counts the oscillator pulses on the OSC1/CLKIN pin. The counter only starts incrementing
after the amplitude of the signal reaches the oscillator input thresholds. This delay allows the
crystal oscillator or resonator to stabilize before the device exits the OST delay. The length of the
time-out is a function of the crystal/resonator frequency.
Figure 3-4 shows the operation of the OST circuit in conjunction with the power-up timer. For low
frequency crystals, this start-up time can become quite long. That is because the time it takes
the low frequency oscillator to start oscillating is longer than the power-up timer’s delay. The time
from when the power-up timer times out to when the oscillator starts to oscillate is a dead time.
There is no minimum or maximum time for this dead time (TDEADTIME), and is dependent on the
time for the oscillator circuitry to have “good” oscillations.
Figure 3-4: Oscillator Start-up Time
3.2.3.1 PLL Lock Time-out
When the PLL is enabled, the time-out sequence following a Power-on Reset is different from
other oscillator modes. A portion of the Power-up Timer is used to provide a fixed time-out that
is sufficient for the PLL to lock to the main oscillator frequency. This PLL lock time-out TPLL (2ms
nominal, Parameter 7 in the “Electrical Specifications” section) follows the Oscillator Start-up
Time-out (OST).
Note: Some devices require the Power-up Timer to be enabled when the Brown-out Reset
circuitry is enabled. Please refer to the device data sheet for requirements.
VDD
MCLR
Oscillator
OST TIME_OUT
PWRT TIME_OUT
INTERNAL RESET
TOSC1
TOST
TPWRT
POR or BOR Trip Point
TOSC1 = Time for the crystal oscillator to react to an oscillation level detectable by the
Oscillator Start-up Timer (OST).
TOST = 1024TOSC.
TDEADTIME
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3.2.4 Power-up Sequence
On power-up, the time-out sequence is as follows: First the internal POR is detected, then, if
enabled, the PWRT time-out is invoked. After the PWRT time-out is over, the OST is activated.
The total time-out will vary based on oscillator configuration and PWRTEN bit status. For example,
in RC mode with the PWRTEN bit set (PWRT disabled), there will be no time-out at all.
Figure 3-5, Figure 3-6 and Figure 3-7 depict time-out sequences.
Since the time-outs occur from the internal POR pulse, if MCLR is kept low long enough, the
time-outs will expire. Bringing MCLR high will begin execution immediately (Figure 3-7). This is
useful for testing purposes or to synchronize more than one device operating in parallel.
If the device voltage is not within the electrical specifications by the end of a time-out, the
MCLR/VPP pin must be held low until the voltage is within the device specification. The use of an
external RC delay is sufficient for many of these applications.
On wake-up from sleep, the OST is activated for various oscillator configurations. When the PLL
is activated in HS mode, an additional delay called TPLL (2 ms nominal) is added to the OST
time-out to allow the necessary lock time for the PLL. See parameter D003 in the “Electrical
Specifications” section for details.
Table 3-1 shows the time-outs that occur in various situations, while Figure 3-5 through
Figure 3-8 show four different cases that can happen on powering up the device.
Table 3-1: Time-out in Various Situations
Figure 3-5: Time-out Sequence on Power-up (MCLR Tied to VDD)
Oscillator
Configuration
Power-up (2) or Brown-Out (3) Wake-up from
SLEEP or
PWRTEN Oscillator Switch = 0 PWRTEN = 1
HS with PLL enabled (1) 72 ms + 1024Tosc + 2ms 1024Tosc + 2 ms 1024Tosc + 2 ms
HS, XT, LP 72 ms + 1024Tosc 1024Tosc 1024Tosc
EC 72 ms — —
External RC 72 ms — —
Note 1: 2 ms = Nominal time required for the PLL to lock. See the “Electrical Specifications” section.
2: 72 ms is the nominal power-up timer delay. See the “Electrical Specifications” section.
3: It is recommended that the power-up timer is enabled when using the Brown-out Reset module.
TPWRT (1)
TOST
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
OST TIME-OUT
INTERNAL RESET
Note 1: TPWRT only occurs when PWRTEN = ‘1’.
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Section 3. Reset
Reset
3
Figure 3-6: Time-out Sequence on Power-up (MCLR not Tied to VDD): Case 1
Figure 3-7: Time-out Sequence on Power-up (MCLR not Tied to VDD): Case 2
Figure 3-8: Time-out Sequence on Power-up with Slow Rise Time (MCLR Tied to VDD)
TPWRT (1)
TOST
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
OST TIME-OUT
INTERNAL RESET
Note 1: TPWRT only occurs when PWRTEN = ‘1’.
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
OST TIME-OUT
INTERNAL RESET
TOST
Note 1: TPWRT only occurs when PWRTEN = ‘1’.
TPWRT (1)
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
OST TIME-OUT
INTERNAL RESET
0V
5V
TOST
TDEADTIME
Note 1: TPWRT only occurs when PWRTEN = ‘1’.
TPWRT (1)
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Figure 3-9: Time-out Sequence on POR w/ PLL Enabled (MCLR Tied to VDD)
TOST
VDD
MCLR
IINTERNAL POR
PWRT TIME-OUT
OST TIME-OUT
INTERNAL RESET
PLL TIME-OUT
TPLL
TOST = 1024 clock cycles.
TPLL = PLL lock time.
TPWRT (1)
Note 1: TPWRT only occurs when PWRTEN = ‘1’.
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Section 3. Reset
Reset
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3.2.5 Brown-Out Reset (BOR)
On-chip Brown-out Reset circuitry places the device into reset when the device voltage (VDD)
falls below a trip point (VBOR). This ensures that the device does not continue program execution
outside the valid voltage operation range of the device. Brown-out resets are typically used in AC
line applications (such as appliances) or large battery applications where large loads may be
switched in (such as automotive).
Appliances encounter brown-out situations during plug-in and online voltage dip. Automotive
electronics encounter brown-out when the ignition key is turned. In these application scenarios,
the device voltage temporarily falls below the specified operating minimum.
If the brown-out circuit meets the current consumption requirements of the system, it may also
be used as a voltage supervisory function.
Figure 3-10 shows typical brown-out situations. The Brown-out Reset module is enabled by
default. To disable the module, the BOREN configuration bit must be cleared at device programming.
Figure 3-10: Brown-Out Situations
Note: Before using the on-chip brown-out for a voltage supervisory function (monitor battery
decay), please review the electrical specifications to ensure that they meet your
requirements.
Note 1: It is recommended that the power-up timer be enabled when using the BOR module.
The power-up timer is enabled by programming the PWRTEN configuration bit
to ‘0’.
Note 2: Some devices require the Power-up Timer to be enabled when the Brown-out Reset
circuitry is enabled. Please refer to the device data sheet for requirements.
Power-up time
VDD
Internal
Reset
VBOR
VDD
Internal
Reset
VBOR
VDD
Internal
Reset
VBOR
Note 1: The Electrical Specification Parameter (parameter 33) has a typical value
of 72 ms.
parameter 33
parameter 33
parameter 33 (1)
(parameter 33)
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3.2.5.1 BOR Operation
The BOREN configuration bit can disable (if clear/programmed) or enable (if set) the Brown-out
Reset circuitry. If VDD falls below VBOR (parameter D005 in the “Electrical Specifications”
section), for greater than the Brown-out Pulse Width Time (TBOR), parameter 35, the brown-out
situation will reset the chip. A reset is not guaranteed to occur if VDD falls below VBOR for less
than parameter 35.
The chip will remain in Brown-out Reset until VDD rises above VBOR. After which, the Power-up
Timer is invoked and will keep the chip in reset an additional time delay (parameter 33). If VDD
drops below VBOR while the Power-up Timer is running, the chip will go back into Reset and the
Power-up Timer will be re-initialized. Once VDD rises above VBOR, the Power-up Timer will again
start a time delay.
When the BOREN bit is set, all voltages below VBOR will hold the device in the reset state. This
includes during the power-up sequence.
The brown-out trip point is user programmable at time of device programming. Figure 3-11 is a
block diagram for the BOR circuit.
Figure 3-11: Block Diagram of BOR Circuit
BOR
VDD
EN
BOR
3 to 1 MUX
BOREN
LVDEN
VREN
BORV1:BORV0
Configuration Bits
Internally Generated
Reference Voltage
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Section 3. Reset
Reset
3
The Brown-out Reset circuit has four available reset trip point voltages. The device selected
determines which trip points make sense in an application. All devices have the trip points of
4.2V and 4.5V available. PIC18LCXXX devices add two more trip points. The first is 2.7V, while
the second is dependent on the minimum operating voltage of that device. This means that the
lowest trip point voltage will either be 2.5V or 1.8V. Table 3-2 shows the state of the configuration
bits (BORV1:BORV0) and the BOR trip points that they select.
Table 3-2: Example BOR Trip Point Levels
The BOR is programmable to ensure that the BOR can be optimized to the voltage-frequency of
the device, since the minimum device VDD value will depend on the frequency of operation. For
example, VDD min. at 40 MHz may be 4.2V, whereas at 2 MHz it may be 1.8V.
BORV1:BORV0
Configuration Bits
Minimum Voltage
Trip Point
Maximum Voltage
Trip Point Comment
1 1 1.8 V 1.86 V PIC18LCXXX Devices
(w/ VDDMIN = 1.8V)
1 1 2.5 V 2.58 V PIC18LCXXX Devices
(w/ VDDMIN ≥ 2.0V)
1 0 2.7 V 2.78 V PIC18LCXXX Devices
0 1 4.2 V 4.33 V All Devices
0 0 4.5 V 4.64 V All Devices
Note: The minimum voltage at which the Brown-out Reset trip point can occur should be
in the valid operating voltage range of the device.
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3.2.5.2 Current Implications for BOR Operation
There are three components to the current consumption of the BOR operation. These are:
1. Current from Internal Reference Voltage
2. Current from BOR comparator
3. Current from resistor ladder
The Internal Reference Voltage is also used by the Low Voltage Detect circuitry and the A/D
voltage references. The resistor ladder is also used by the Low Voltage Detect circuitry. If the
Low Voltage Detect is enabled, then only the additional current of the comparator is added for
enabling the BOR feature.
When the module is enabled, the BOR comparator and voltage divider are enabled and consume
static current. The “Electrical Specifications” section parameter 32 gives the current
specification.
The Brown-out Comparator circuit consumes current when enabled. To eliminate this current
consumption, the Brown-out Reset can be disabled by programming the Brown-out Reset
Enable configuration bit (BOREN) to '0'.
3.2.5.3 BOR Initialization
The BOR module must be enabled and programmed through the device configuration bits.
These include BOREN, which enables or disables the module, and BORV1:BORV0, which set
the BOR voltage.
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Section 3. Reset
Reset
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3.2.5.4 External Brown-Out Reset Circuits
There are some applications where the device’s programmable Brown-out Reset trip point levels
may still not be at the desired level for the application.
Figure 3-12 shows a circuit for external brown-out protection using the MCP100 device.
Figure 3-13 and Figure 3-14 are two examples of external circuitry that may be implemented.
Each option needs to be evaluated to determine if they match the requirements of the application.
Figure 3-12: External Brown-Out Protection Using the MCP100
Figure 3-13: External Brown-Out Protection Circuit 1
Figure 3-14: External Brown-Out Protection Circuit 2
VSS
RST
MCP100
VDD
bypass
capacitor
PIC18CXXX
VDD
MCLR
Note 1: Internal Brown-out Reset circuitry should be disabled when using this circuit.
2: Resistors should be adjusted for the characteristics of the transistor.
3: This circuit will activate reset when VDD goes below (Vz + 0.7V)
where Vz = Zener voltage.
VDD
33 kΩ
10 kΩ
40 kΩ
VDD
MCLR
PIC18CXXX
Q1
R2 40 kΩ
VDD
MCLR
PIC18CXXX
R1
Q1
VDD
Note 1: This circuit is less expensive, but less accurate. Transistor Q1 turns off when VDD
is below a certain level such that:
2: Internal Brown-out Reset circuitry should be disabled when using this circuit.
3: Resistors should be adjusted for the characteristics of the transistor.
VDD • R1
R1 + R2
= 0.7V
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3.3 Registers and Status Bit Values
Table 3-3 shows the significance of the device status bits and the initialization conditions for the
RCON register. Table 3-4 shows the reset conditions for the Special Function Registers.
Register 3-1 shows the bits of the RCON register and Table 3-3 shows the initialization values.
Register 3-1: RCON Register Bits and Positions
Table 3-3: Status Bits, Their Significance, and the Initialization Condition for RCON Register
R/W-0 R/W-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-u
IPEN LWRT — RI TO PD POR BOR
bit 7 bit 0
Condition Program
Counter
RCON
Register
RI TO PD POR BOR STKFUL STKUNF
Power-on Reset 0000h 00-1 1100 111 0 u u u
MCLR Reset during normal operation 0000h 00-u uuuu uuu u u u u
Software Reset during normal operation 0000h 0u-0 uuuu 0uu u u u u
Stack Overflow Reset during normal
operation
0000h 0u-u uu11 uuu u u u 1
Stack Underflow Reset during normal
operation
0000h 0u-u uu11 uuu u u 1 u
MCLR Reset during SLEEP 0000h 00-u 10uu u10 u u u u
WDT Reset 0000h 0u-u 01uu 101 u u u u
WDT Wake-up PC + 2 uu-u 00uu u00 u u u u
Brown-out Reset 0000h 0u-1 11u0 111 1 0 u u
Interrupt Wake-up from SLEEP PC + 2 (1) uu-u 00uu u10 u u u u
Legend: u = unchanged, x = unknown, - = unimplemented bit read as '0'.
Note 1: When the wake-up is due to an interrupt and the GIEH or GIEL bits are set, the PC is loaded with the
interrupt vector (0008h or 0018h).
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Section 3. Reset
Reset
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Table 3-4: Initialization Conditions for SFR Registers
Register Power-on Reset,
Brown-out Reset
MCLR Resets
WDT Reset
Reset Instruction
Stack Resets
Wake-up via WDT or
Interrupt
TOSU ---0 0000 ---0 0000 ---0 uuuu (3)
TOSH 0000 0000 0000 0000 uuuu uuuu (3)
TOSL 0000 0000 0000 0000 uuuu uuuu (3)
STKPTR 00-0 0000 00-0 0000 uu-u uuuu (3)
PCLATU ---0 0000 ---0 0000 ---u uuuu
PCLATH 0000 0000 0000 0000 uuuu uuuu
PCL 0000 0000 0000 0000 PC + 2 (2)
TBLPTRU --00 0000 --00 0000 --uu uuuu
TBLPTRH 0000 0000 0000 0000 uuuu uuuu
TBLPTRL 0000 0000 0000 0000 uuuu uuuu
TABLAT 0000 0000 0000 0000 uuuu uuuu
PRODH xxxx xxxx uuuu uuuu uuuu uuuu
PRODL xxxx xxxx uuuu uuuu uuuu uuuu
INTCON 0000 000x 0000 000u uuuu uuuu (1)
INTCON2 1111 -1-1 1111 -1-1 uuuu -u-u (1)
INTCON3 11-0 0-00 11-0 0-00 uu-u u-uu (1)
INDF0 N/A N/A N/A
POSTINC0 N/A N/A N/A
POSTDEC0 N/A N/A N/A
PREINC0 N/A N/A N/A
PLUSW0 N/A N/A N/A
FSR0H ---- 0000 ---- 0000 ---- uuuu
FSR0L xxxx xxxx uuuu uuuu uuuu uuuu
WREG xxxx xxxx uuuu uuuu uuuu uuuu
INDF1 N/A N/A N/A
POSTINC1 N/A N/A N/A
POSTDEC1 N/A N/A N/A
PREINC1 N/A N/A N/A
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as '0', q = value depends
on condition.
Note 1: One or more bits in the INTCONx or PIRx registers will be affected (to cause
wake-up).
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is
loaded with the interrupt vector (0008h or 0018h).
3: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU,
TOSH and TOSL are updated with the current value of the PC. The STKPTR is modified
to point to the next location in the hardware stack.
4: The long write enable is only reset on a POR or MCLR reset.
5: The bits in the PIR, PIE, and IPR registers are device dependent. Their function and
location may change from device to device.
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PLUSW1 N/A N/A N/A
FSR1H ---- 0000 ---- 0000 ---- uuuu
FSR1L xxxx xxxx uuuu uuuu uuuu uuuu
BSR ---- 0000 ---- 0000 ---- uuuu
INDF2 N/A N/A N/A
POSTINC2 N/A N/A N/A
POSTDEC2 N/A N/A N/A
PREINC2 N/A N/A N/A
PLUSW2 N/A N/A N/A
FSR2H ---- 0000 ---- 0000 ---- uuuu
FSR2L xxxx xxxx uuuu uuuu uuuu uuuu
STATUS ---x xxxx ---u uuuu ---u uuuu
TMR0H xxxx xxxx uuuu uuuu uuuu uuuu
TMR0L xxxx xxxx uuuu uuuu uuuu uuuu
T0CON 1111 1111 1111 1111 uuuu uuuu
OSCCON ---- ---0 ---- ---0 ---- ---u
LVDCON --00 0101 --00 0101 --uu uuuu
WDTCON ---- ---0 ---- ---0 ---- ---u
RCON (4) 00-1 11q0 00-1 qquu uu-u qquu
TMR1H xxxx xxxx uuuu uuuu uuuu uuuu
TMR1L xxxx xxxx uuuu uuuu uuuu uuuu
T1CON 0-00 0000 u-uu uuuu u-uu uuuu
TMR2 xxxx xxxx uuuu uuuu uuuu uuuu
PR2 1111 1111 1111 1111 1111 1111
T2CON -000 0000 -000 0000 -uuu uuuu
SSPBUF xxxx xxxx uuuu uuuu uuuu uuuu
SSPADD 0000 0000 0000 0000 uuuu uuuu
SSPSTAT 0000 0000 0000 0000 uuuu uuuu
SSPCON1 0000 0000 0000 0000 uuuu uuuu
SSPCON2 0000 0000 0000 0000 uuuu uuuu
Table 3-4: Initialization Conditions for SFR Registers (Continued)
Register Power-on Reset,
Brown-out Reset
MCLR Resets
WDT Reset
Reset Instruction
Stack Resets
Wake-up via WDT or
Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as '0', q = value depends
on condition.
Note 1: One or more bits in the INTCONx or PIRx registers will be affected (to cause
wake-up).
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is
loaded with the interrupt vector (0008h or 0018h).
3: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU,
TOSH and TOSL are updated with the current value of the PC. The STKPTR is modified
to point to the next location in the hardware stack.
4: The long write enable is only reset on a POR or MCLR reset.
5: The bits in the PIR, PIE, and IPR registers are device dependent. Their function and
location may change from device to device.
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Section 3. Reset
Reset
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ADRESH xxxx xxxx uuuu uuuu uuuu uuuu
ADRESL xxxx xxxx uuuu uuuu uuuu uuuu
ADCON0 0000 0000 0000 0000 uuuu uuuu
ADCON1 --0- 0000 --0- 0000 --u- uuuu
CCPR1H xxxx xxxx uuuu uuuu uuuu uuuu
CCPR1L xxxx xxxx uuuu uuuu uuuu uuuu
CCP1CON --00 0000 --00 0000 --uu uuuu
CCPR2H xxxx xxxx uuuu uuuu uuuu uuuu
CCPR2L xxxx xxxx uuuu uuuu uuuu uuuu
CCP2CON --00 0000 --00 0000 --uu uuuu
TMR3H xxxx xxxx uuuu uuuu uuuu uuuu
TMR3L xxxx xxxx uuuu uuuu uuuu uuuu
T3CON 0000 0000 uuuu uuuu uuuu uuuu
SPBRG xxxx xxxx uuuu uuuu uuuu uuuu
RCREG xxxx xxxx uuuu uuuu uuuu uuuu
TXREG xxxx xxxx uuuu uuuu uuuu uuuu
TXSTA 0000 -01x 0000 -01u uuuu -uuu
RCSTA 0000 000x 0000 000u uuuu uuuu
IPR2 (5) 11 u
PIR2 (5) 0 0 u (1)
PIE2 (5) 00 u
IPR1 (5) 11 u
PIR1 (5) 0 0 u (1)
PIE1 (5) 00 u
Table 3-4: Initialization Conditions for SFR Registers (Continued)
Register Power-on Reset,
Brown-out Reset
MCLR Resets
WDT Reset
Reset Instruction
Stack Resets
Wake-up via WDT or
Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as '0', q = value depends
on condition.
Note 1: One or more bits in the INTCONx or PIRx registers will be affected (to cause
wake-up).
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is
loaded with the interrupt vector (0008h or 0018h).
3: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU,
TOSH and TOSL are updated with the current value of the PC. The STKPTR is modified
to point to the next location in the hardware stack.
4: The long write enable is only reset on a POR or MCLR reset.
5: The bits in the PIR, PIE, and IPR registers are device dependent. Their function and
location may change from device to device.
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TRISE 0000 -111 0000 -111 uuuu -uuu
TRISD 1111 1111 1111 1111 uuuu uuuu
TRISC 1111 1111 1111 1111 uuuu uuuu
TRISB 1111 1111 1111 1111 uuuu uuuu
TRIS -111 1111 -111 1111 -uuu uuuu
LATE ---- -xxx ---- -uuu ---- -uuu
LATD xxxx xxxx uuuu uuuu uuuu uuuu
LATC xxxx xxxx uuuu uuuu uuuu uuuu
LATB xxxx xxxx uuuu uuuu uuuu uuuu
LATA -xxx xxxx -uuu uuuu -uuu uuuu
PORTE ---- -000 ---- -000 ---- -uuu
PORTD xxxx xxxx uuuu uuuu uuuu uuuu
PORTC xxxx xxxx uuuu uuuu uuuu uuuu
PORTB xxxx xxxx uuuu uuuu uuuu uuuu
PORTA -x0x 0000 -u0u 0000 -uuu uuuu
Table 3-4: Initialization Conditions for SFR Registers (Continued)
Register Power-on Reset,
Brown-out Reset
MCLR Resets
WDT Reset
Reset Instruction
Stack Resets
Wake-up via WDT or
Interrupt
Legend: u = unchanged, x = unknown, - = unimplemented bit, read as '0', q = value depends
on condition.
Note 1: One or more bits in the INTCONx or PIRx registers will be affected (to cause
wake-up).
2: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the PC is
loaded with the interrupt vector (0008h or 0018h).
3: When the wake-up is due to an interrupt and the GIEL or GIEH bit is set, the TOSU,
TOSH and TOSL are updated with the current value of the PC. The STKPTR is modified
to point to the next location in the hardware stack.
4: The long write enable is only reset on a POR or MCLR reset.
5: The bits in the PIR, PIE, and IPR registers are device dependent. Their function and
location may change from device to device.
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Section 3. Reset
Reset
3
3.3.1 Reset Control (RCON) Register
The Reset Control (RCON) register contains flag bits to allow differentiation between resets. The
Reset Control register has seven bits.
The POR (Power-on Reset) bit is cleared on a Power-on Reset and is unaffected otherwise. The
user sets this bit following a Power-on Reset. On subsequent resets, if the POR bit is clear (= ‘0’),
it will indicate that a Power-on Reset must have occurred.
The power-down bit (PD) provides indication if the device was placed into sleep mode. It is set
by a power-up, a CLRWDT instruction or by user software. The PD bit is cleared when the SLEEP
instruction is executed or by user software.
Register 3-2: RCON Register
Note: The state of the BOR bit is unknown on Power-on Reset. It must be set by the user
and checked on subsequent resets to see if the BOR bit is clear, indicating a
brown-out has occurred. The BOR status bit is a “don't care” and is not necessarily
predictable if the brown-out circuit is disabled (by clearing the BOREN bit in the
Configuration register).
R/W-0 R/W-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1 R/W-u
IPEN LWRT — RI TO PD POR BOR
bit 7 bit 0
bit 7 IPEN: Interrupt Priority Enable bit
1 = Enable priority levels on interrupts
0 = Disable priority levels on interrupts
bit 6 LWRT: Long Write Enable bit
1 = Enable Table Writes to internal program memory
Once this bit is set, it can only be cleared by a POR or MCLR reset.
0 = Disable Table Writes to internal program memory; Table Writes only to external program
memory.
bit 5 Unimplemented: Read as '0'
bit 4 RI: Reset Instruction Flag bit
1 = The RESET instruction was not invoked
0 = The RESET instruction was executed
(must be set in software after the RESET instruction is executed)
bit 3 TO: Time-out bit
1 = After power-up, CLRWDT instruction or SLEEP instruction
0 = A WDT time-out occurred
bit 2 PD: Power-down bit
1 = After power-up or by the CLRWDT instruction
0 = By execution of the SLEEP instruction
bit 1 POR: Power-on Reset Flag bit
1 = A Power-on Reset has not occurred
0 = A Power-on Reset occurred
(must be set in software after a Power-on Reset occurs)
bit 0 BOR: Brown-out Reset Flag bit
1 = A Brown-out Reset has not occurred
0 = A Brown-out Reset occurred
(must be set in software after a Brown-out Reset or Power-on Reset occurs)
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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DS39503A-page 3-20 2000 Microchip Technology Inc.
3.4 Design Tips
Question 1: With windowed devices, my system resets and operates properly. With an
OTP device, my system does not operate properly.
Answer 1:
The most common reason for this is that the windowed device has not had its window covered.
The background light causes the device to power-up in a different state than would typically be
seen in a device where no light is present. In most cases, all the General Purpose RAM and Special
Function Registers were not initialized by the application software.
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Section 3. Reset
Reset
3
3.5 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is, they may be written for
the Base-Line, the Mid-Range or High-End families), but the concepts are pertinent and could be
used (with modification and possible limitations). The current application notes related to Resets
are:
Title Application Note #
Power-up Trouble Shooting AN607
Power-up Considerations AN522
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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3.6 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Reset description.
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Architechture
4
Section 4. Architecture
HIGHLIGHTS
This section of the manual contains the following major topics:
4.1 Introduction .................................................................................................................... 4-2
4.2 Clocking Scheme/Instruction Cycle ............................................................................... 4-5
4.3 Instruction Flow/Pipelining ............................................................................................. 4-6
4.4 I/O Descriptions ............................................................................................................. 4-7
4.5 Design Tips.................................................................................................................. 4-14
4.6 Related Application Notes............................................................................................ 4-15
4.7 Revision History........................................................................................................... 4-16
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4.1 Introduction
The high performance of the PIC18CXXX devices can be attributed to a number of architectural
features commonly found in RISC microprocessors. These include:
• Harvard architecture
• Long Word Instructions
• Single Word Instructions
• Single Cycle Instructions
• Instruction Pipelining
• Reduced Instruction Set
• Register File Architecture
• Orthogonal (Symmetric) Instructions
Figure 4-2 shows a general block diagram for PIC18CXXX devices.
Harvard Architecture:
Harvard architecture has the program memory and data memory as separate memories which
are accessed from separate buses. This improves bandwidth over traditional von Neumann
architecture in which program and data are fetched from the same memory using the same bus.
To execute an instruction, a von Neumann machine must make one or more (generally more)
accesses across the 8-bit bus to fetch the instruction. Then data may need to be fetched, operated
on and possibly written. As can be seen from this description, the bus can become
extremely congested. With a Harvard architecture, the instruction is fetched in a single instruction
cycle (all 16 bits). While the program memory is being accessed, the data memory is on an independent
bus and can be read and written. These separated busses allow one instruction to execute,
while the next instruction is fetched. A comparison of Harvard and von Neumann
architectures is shown in Figure 4-1.
Figure 4-1: Harvard vs. von Neumann Block Architectures
Long Word Instructions:
Long word instructions have a wider (more bits) instruction bus than the 8-bit data memory bus.
This is possible because the two buses are separate. This allows instructions to be sized differently
than the 8-bit wide data word and allows a more efficient use of the program memory, since
the program memory width is optimized to the architectural requirements.
Single Word Instructions:
Single word instruction opcodes are 16-bits wide making it possible to have all but a few instructions
be single word instructions. A 16-bit wide program memory access bus fetches a 16-bit
instruction in a single cycle. With single word instructions, the number of words of program memory
locations equals the number of instructions for the device. This means that all locations are
valid instructions.
Typically in the von Neumann architecture, most instructions are multi-byte. In general, a device
with 4 Kbytes of program memory would allow approximately 2K of instructions. This 2:1 ratio is
generalized and dependent on the application code. Since each instruction may take multiple
bytes, there is no assurance that each location is a valid instruction.
Program
Memory
Data
Memory
Program
Memory
and
Data CPU CPU
8 16 8
Harvard von Neumann
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Section 4 Architecture
Architechture
4
Double Word Instructions:
Some operations require more information then can be stored in the 16 bits of a program memory
location. These operations require a double word instruction, and are therefore 32-bits wide.
Instructions that require this second instruction word are:
• Memory to memory move instruction (12 bits for each RAM address)
- MOVFF SourceReg, DestReg
• Literal value to FSR move instruction (12 bits for data and 2 bits for FSR to load)
- LFSR FSR#, Address
• Call and goto operations (20 bits for address)
- CALL Address
- GOTO Address
The first word indicates to the CPU that the next program memory location is the additional information
for this instruction and not an instruction. If the CPU tries to execute the second word of
an instruction (due to a software modified PC pointing to that location as an instruction), the
fetched data is executed as a NOP.
Double word instruction execution is not split between the two TCY cycles by an interrupt request.
That is, when an interrupt request occurs during the execution of a double word instruction, the
execution of the instruction is completed before the processor vectors to the interrupt address.
The interrupt latency is preserved.
Instruction Pipeline:
The instruction pipeline is a two-stage pipeline that overlaps the fetch and execution of instructions.
The fetch of the instruction takes one TCY, while the execution takes another TCY. However,
due to the overlap of the fetch of current instruction and execution of previous instruction, an
instruction is fetched and another instruction is executed every TCY.
Single Cycle Instructions:
With the program memory bus being 16-bits wide, the entire instruction is fetched in a single
machine cycle (TCY), except for double word instructions. The instruction contains all the information
required and is executed in a single cycle. There may be a one cycle delay in execution
if the result of the instruction modified the contents of the program counter. This requires the pipeline
to be flushed and a new instruction to be fetched.
Two Cycle Instructions:
Double word instructions require two cycles to execute, since all the required information is in the
32 bits.
Reduced Instruction Set:
When an instruction set is well designed and highly orthogonal (symmetric), fewer instructions
are required to perform all needed tasks. With fewer instructions, the whole set can be more rapidly
learned.
Register File Architecture:
The register files/data memory can be directly or indirectly addressed. All special function registers,
including the program counter, are mapped in the data memory.
Orthogonal (Symmetric) Instructions:
Orthogonal instructions make it possible to carry out any operation on any register using any
addressing mode. This symmetrical nature and lack of “special instructions” make programming
simple yet efficient. In addition, the learning curve is reduced significantly. The Enhanced MCU
instruction set uses only three non-register oriented instructions, which are used for two of the
cores features. One is the SLEEP instruction, which places the device into the lowest power use
mode. The second is the CLRWDT instruction, which verifies the chip is operating properly by preventing
the on-chip Watchdog Timer (WDT) from overflowing and resetting the device. The third
is the RESET instruction, which resets the device.
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Figure 4-2: General Enhanced MCU Block Diagram
Power-up
Timer
Oscillator
Start-up Timer
Power-on
Reset
Watchdog
Timer
Instruction
Decode &
Control
OSC1/CLKIN
OSC2/CLKOUT
MCLR VDD, VSS
PORTA
PORTB
PORTC
RA4
RA5
RB0/INT0
RB<7:4>
RC0
RC1
RC2
RC3
RC4
RC5
RC6
RC7
Brown-out
Reset
Note 1: Many of the general purpose I/O pins are multiplexed with one or more peripheral module functions. The multiplexing combinations are
device dependent.
RA3
RA2
RA1
RA0
Timing
Generation
4X PLL
RB1/INT1
Data Latch
Data RAM
(up to 4K
address reach)
Address Latch
Address<12>
12
BSR FSR0 Bank0, F
FSR1
FSR2
inc / dec Decode logic
4 12 4
PCH PCL
PCLATH
8
31 Level Stack
Program Counter
PRODH PRODL
8 x 8 Multiply
W
8
BITOP
8 8
ALU<8>
8
Address Latch
Program Memory
(up to 2M Bytes)
Data Latch
20
21
21
16
8
8
8
Table Pointer<21>
inc/dec logic
21
8
Data Bus<8>
TABLELATCH
8
Instruction
12
3
ROMLATCH
PORTD
RB2/INT2
RB3
T1OSI
T1OSO
PCLATU
PCU
RA6
Precision
Reference
Bandgap
Register
8
Addressable CCP’s Synchronous
Timer0 Timer1 Timer2
Serial Port
Timer3 A/D Converter
Enhanced
USART
Master
Other
Peripherals
RD0
RD1
RD2
RD3
RD4
RD5
RD6
RD7
PORTE
RE0
RE1
RE2
RE3
RE4
RE5
RE6
RE7
Peripheral Modules (Note 1)
CAN USB
PORTx
Rx0
Rx1
Rx2
Rx3
Rx4
Rx5
Rx6
Rx7
CCP’s
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Section 4 Architecture
Architechture
4
4.2 Clocking Scheme/Instruction Cycle
The clock input is internally divided by four to generate four non-overlapping quadrature clocks,
namely Q1, Q2, Q3 and Q4. Internally, the program counter is incremented every Q1, and the
instruction is fetched from the program memory and latched into the instruction register in Q4.
The instruction is decoded and executed during the following Q1 through Q4. The clocks and
instruction execution flow are illustrated in Figure 4-3 and Example 4-1.
Figure 4-3: Clock/Instruction Cycle
4.2.1 Phase Lock Loop (PLL)
The clock input is multiplied by four by the PLL. Therefore, when it is internally divided by four, it
provides an instruction cycle that is the same frequency as the external clock frequency. Four
non-overlapping quadrature clocks, namely Q1, Q2, Q3 and Q4 are still generated internally.
Internally, the program counter (PC) is incremented every Q1, and the instruction is fetched from
the program memory and latched into the instruction register in Q4. The instruction is decoded
and executed during the following Q1 through Q4. The clocks and instruction execution flow are
illustrated in Figure 4-4 and Example 4-1.
Figure 4-4: Clock/Instruction Cycle with PLL
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Device Clock
Q1
Q2
Q3
Q4
PC
CLKOUT
(RC mode)
PC PC+2 PC+4
Fetch INST (PC)
Execute INST (PC-2) Fetch INST (PC+2)
Execute INST (PC) Fetch INST (PC+4)
Execute INST (PC+2)
Internal
phase
clock
TCY1 TCY2 TCY3
(OSC1 or T1OSCI)
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
PLL Output
Q1
Q2
Q3
Q4
PC
OSC2/CLKOUT
(RC mode)
PC PC+2 PC+4
Fetch INST (PC)
Execute INST (PC-2) Fetch INST (PC+2)
Execute INST (PC) Fetch INST (PC+4)
Execute INST (PC+2)
Internal
phase
clock
TCY1 TCY2 TCY3
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4.3 Instruction Flow/Pipelining
An “Instruction Cycle” consists of four Q cycles (Q1, Q2, Q3 and Q4). Fetch takes one instruction
cycle, while decode and execute takes another instruction cycle. However, due to pipelining,
each instruction effectively executes in one cycle. If an instruction causes the program counter
to change (e.g. GOTO instruction), then an extra cycle is required to complete the instruction (See
Example 4-1).
The instruction fetch begins with the program counter incrementing in Q1.
In the execution cycle, the fetched instruction is latched into the “Instruction Register (IR)” in
cycle Q1. This instruction is then decoded and executed during the Q2, Q3 and Q4 cycles. Data
memory is read during Q2 (operand read) and written during Q4 (destination write).
Example 4-1 shows the operation of the two stage pipeline for the instruction sequence shown.
At time TCY0, the first instruction is fetched from program memory. During TCY1, the first instruction
executes, while the second instruction is fetched. During TCY2, the second instruction executes,
while the third instruction is fetched. During TCY3, the fourth instruction is fetched, while
the third instruction (CALL SUB_1) is executed. When the third instruction completes execution,
the CPU forces the address of instruction four onto the Stack and then changes the Program
Counter (PC) to the address of SUB_1. This means that the instruction that was fetched during
TCY3 needs to be “flushed” from the pipeline. During TCY4, instruction four is flushed (executed
as a NOP) and the instruction at address SUB_1 is fetched. Finally during TCY5, instruction five is
executed and the instruction at address SUB_1 + 2 is fetched.
Example 4-1: Instruction Pipeline Flow
Most instructions are single cycle. Program branches take two cycles, since the fetch instruction is “flushed” from
the pipeline while the new instruction is being fetched and then executed.
TCY0 TCY1 TCY2 TCY3 TCY4 TCY5
1. MOVLW 55h Fetch 1 Execute 1
2. MOVWF PORTB Fetch 2 Execute 2
3. CALL SUB_1 Fetch 3 Execute 3
4. BSF PORTA, BIT3 (Forced NOP) Fetch 4 Flush
5. Instruction @ address SUB_1 Fetch SUB_1 Execute SUB_1
Fetch SUB_1 + 2
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Section 4 Architecture
Architechture
4
4.4 I/O Descriptions
Table 4-1 gives a brief description of device pins and the functions that may be multiplexed to a
port pin. Multiple functions may exist on one port pin. When multiplexing occurs, the peripheral
module’s functional requirements may force an override of the data direction (TRIS bit) of the port
pin (such as in the A/D and Comparator modules).
Table 4-1: I/O Descriptions
Pin Name Pin
Type
Buffer
Type Description
A19 O — System bus address line 19
A18 O — System bus address line 18
A17 O — System bus address line 17
A16 O — System bus address line 16
AD15 I/O TTL System bus address/data line 15
AD14 I/O TTL System bus address/data line 14
AD13 I/O TTL System bus address/data line 13
AD12 I/O TTL System bus address/data line 12
AD11 I/O TTL System bus address/data line 11
AD10 I/O TTL System bus address/data line 10
AD9 I/O TTL System bus address/data line 9
AD8 I/O TTL System bus address/data line 8
AD7 I/O TTL System bus address/data line 7
AD6 I/O TTL System bus address/data line 6
AD5 I/O TTL System bus address/data line 5
AD4 I/O TTL System bus address/data line 4
AD3 I/O TTL System bus address/data line 3
AD2 I/O TTL System bus address/data line 2
AD1 I/O TTL System bus address/data line 1
AD0 I/O TTL System bus address/data line 0
ALE O — System bus address latch enable strobe
Analog Input Channels
AN0 I Analog
AN1 I Analog
AN2 I Analog
AN3 I Analog
AN4 I Analog
AN5 I Analog
AN6 I Analog
AN7 I Analog
AN8 I Analog
AN9 I Analog
AN10 I Analog
AN11 I Analog
AN12 I Analog
AN13 I Analog
AN14 I Analog
AN15 I Analog
AVDD P P Analog Power
Legend: TTL = TTL-compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels O = output
PU = Weak internal pull-up I = input
Analog = Analog input or output P = Power
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AVSS P P Analog Ground
BA0 O — System bus byte address 0
CANRX I ST CAN bus receive pin
CANTX0 O — CAN bus transmit
CANTX1 O — CAN bus complimentary transmit or CAN bus bit time clock
CCP1 I/O ST Capture1 input/Compare1 output/PWM1 output
CCP2 I/O ST Capture2 input/Compare2 output/PWM2 output.
CK I/O ST USART Synchronous Clock, always associated with TX pin function
(See related TX, RX, DT)
CLKI I ST/CMOS External clock source input. Always associated with pin function
OSC1. (See related OSC1/CLKIN, OSC2/CLKOUT pins)
CLKO O — Oscillator crystal output. Connects to crystal or resonator in crystal
oscillator mode. In RC mode, OSC2 pin outputs CLKOUT which has
1/4 the frequency of OSC1, and denotes the instruction cycle rate.
Always associated with OSC2 pin function. (See related OSC2,
OSC1)
CMPA O — Comparator A output
CMPB O — Comparator B output
CS I TTL Chip select control for parallel slave port (See related RD and WR)
CVREF O Analog Comparator voltage reference output
DT I/O ST USART Synchronous Data. Always associated RX pin function. (See
related RX, TX, CK)
Table 4-1: I/O Descriptions (Continued)
Pin Name Pin
Type
Buffer
Type Description
Legend: TTL = TTL-compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels O = output
PU = Weak internal pull-up I = input
Analog = Analog input or output P = Power
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Section 4 Architecture
Architechture
4
INT0 I ST External Interrupt0
INT1 I ST External Interrupt1
INT2 I ST External Interrupt2
LB O — System bus low byte strobe
LVDIN I Analog Low voltage detect input
MCLR I/P ST Master clear (reset) input or programming voltage input. This pin is
an active low reset to the device.
NC — — These pins should be left unconnected.
OE O — System bus output enable strobe
OSC1 I ST/CMOS Oscillator crystal input or external clock source input. ST buffer when
configured in RC mode. CMOS otherwise.
OSC2 O — Oscillator crystal output. Connects to crystal or resonator in crystal
oscillator mode. In RC mode, OSC2 pin outputs CLKOUT, which has
1/4 the frequency of OSC1, and denotes the instruction cycle rate.
PSP0 I/O TTL Parallel Slave Port for interfacing to a microprocessor port. These
PSP1 I/O TTL pins have TTL input buffers when PSP module is enabled.
PSP2 I/O TTL
PSP3 I/O TTL
PSP4 I/O TTL
PSP5 I/O TTL
PSP6 I/O TTL
PSP7 I/O TTL
PORTA is a bi-directional I/O port.
RA0 I/O TTL
RA1 I/O TTL
RA2 I/O TTL
RA3 I/O TTL
RA4 I/O ST RA4 is an open drain when configured as output.
RA5 I/O TTL
RA6 I/O TTL
PORTB is a bi-directional I/O port. PORTB can be software programmed
for internal weak pull-ups on all inputs.
RB0 I/O TTL
RB1 I/O TTL
RB2 I/O TTL
RB3 I/O TTL
RB4 I/O TTL Interrupt on change pin.
RB5 I/O TTL Interrupt on change pin.
RB6 I/O TTL/ST Interrupt on change pin. Serial programming clock. TTL input
buffer as general purpose I/O, Schmitt Trigger input buffer when
used as the serial programming clock.
RB7 I/O TTL/ST Interrupt on change pin. Serial programming data. TTL input
buffer as general purpose I/O, Schmitt Trigger input buffer when
used as the serial programming data.
Table 4-1: I/O Descriptions (Continued)
Pin Name Pin
Type
Buffer
Type Description
Legend: TTL = TTL-compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels O = output
PU = Weak internal pull-up I = input
Analog = Analog input or output P = Power
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DS39504A-page 4-10 2000 Microchip Technology Inc.
PORTC is a bi-directional I/O port.
RC0 I/O ST
RC1 I/O ST
RC2 I/O ST
RC3 I/O ST
RC4 I/O ST
RC5 I/O ST
RC6 I/O ST
RC7 I/O ST
RD I TTL Read control for parallel slave port. (See also WR and CS pins.)
PORTD is a bi-directional I/O port.
RD0 I/O ST
RD1 I/O ST
RD2 I/O ST
RD3 I/O ST
RD4 I/O ST
RD5 I/O ST
RD6 I/O ST
RD7 I/O ST
PORTE is a bi-directional I/O port.
RE0 I/O ST
RE1 I/O ST
RE2 I/O ST
RE3 I/O ST
RE4 I/O ST
RE5 I/O ST
RE6 I/O ST
RE7 I/O ST
PORTF is a digital input
RF0 I/O ST
RF1 I/O ST
RF2 I/O ST
RF3 I/O ST
RF4 I/O ST
RF5 I/O ST
RF6 I/O ST
RF7 I/O ST
Table 4-1: I/O Descriptions (Continued)
Pin Name Pin
Type
Buffer
Type Description
Legend: TTL = TTL-compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels O = output
PU = Weak internal pull-up I = input
Analog = Analog input or output P = Power
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2000 Microchip Technology Inc. DS39504A-page 4-11
Section 4 Architecture
Architechture
4
PORTG is a digital input
RG0 I/O ST
RG1 I/O ST
RG2 I/O ST
RG3 I/O ST
RG4 I/O ST
RG5 I/O ST
RG6 I/O ST
RG7 I/O ST
PORTH is a digital input
RH0 I/O ST
RH1 I/O ST
RH2 I/O ST
RH3 I/O ST
RH4 I/O ST
RH5 I/O ST
RH6 I/O ST
RH7 I/O ST
PORTJ is a digital input
RJ0 I/O ST
RJ1 I/O ST
RJ2 I/O ST
RJ3 I/O ST
RJ4 I/O ST
RJ5 I/O ST
RJ6 I/O ST
RJ7 I/O ST
PORTK is a digital input
RK0 I/O ST
RK1 I/O ST
RK2 I/O ST
RK3 I/O ST
RK4 I/O ST
RK5 I/O ST
RK6 I/O ST
RK7 I/O ST
Table 4-1: I/O Descriptions (Continued)
Pin Name Pin
Type
Buffer
Type Description
Legend: TTL = TTL-compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels O = output
PU = Weak internal pull-up I = input
Analog = Analog input or output P = Power
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DS39504A-page 4-12 2000 Microchip Technology Inc.
PORTL is a digital input
RL0 I/O ST
RL1 I/O ST
RL2 I/O ST
RL3 I/O ST
RL4 I/O ST
RL5 I/O ST
RL6 I/O ST
RL7 I/O ST
RX I ST USART Asynchronous Receive
SCL I/O ST Synchronous serial clock input/output for I2C mode.
SCLA I/O ST Synchronous serial clock for I2C interface.
SCLB I/O ST Synchronous serial clock for I2C interface.
SDA I/O ST I2C™ Data I/O
SDAA I/O ST Synchronous serial data I/O for I2C interface
SDAB I/O ST Synchronous serial data I/O for I2C interface
SCK I/O ST Synchronous serial clock input/output for SPI mode.
SDI I ST SPI Data In
SDO O — SPI Data Out (SPI mode)
SS I ST SPI Slave Select input
T0CKI I ST Timer0 external clock input
T1CKI I ST Timer1 external clock input
T1OSO O CMOS Timer1 oscillator output
T1OSI I CMOS Timer1 oscillator input
TX O — USART Asynchronous Transmit (See related RX)
UB O — System bus upper byte strobe
Table 4-1: I/O Descriptions (Continued)
Pin Name Pin
Type
Buffer
Type Description
Legend: TTL = TTL-compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels O = output
PU = Weak internal pull-up I = input
Analog = Analog input or output P = Power
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Section 4 Architecture
Architechture
4
VREF I Analog Analog High Voltage Reference input.
DR reference voltage output on devices with comparators.
VREF+ I Analog Analog High Voltage Reference input.
Usually multiplexed onto an analog pin.
VREF- I Analog Analog Low Voltage Reference input.
Usually multiplexed onto an analog pin.
VSS P — Ground reference for logic and I/O pins.
VDD P — Positive supply for logic and I/O pins.
VPP P — Programming voltage input
WR I TTL Write control for parallel slave port (See CS and RD pins also).
WRL O — System bus write low byte strobe
WRH O — System bus write high byte strobe
Table 4-1: I/O Descriptions (Continued)
Pin Name Pin
Type
Buffer
Type Description
Legend: TTL = TTL-compatible input CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels O = output
PU = Weak internal pull-up I = input
Analog = Analog input or output P = Power
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PIC18C Reference Manual
DS39504A-page 4-14 2000 Microchip Technology Inc.
4.5 Design Tips
No related design tips at this time.
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2000 Microchip Technology Inc. DS39504A-page 4-15
Section 4 Architecture
Architechture
4
4.6 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is, they may be written for
the Base-Line, the Mid-Range, or High-End families), but the concepts are pertinent and could
be used (with modification and possible limitations). The current application notes related to
Architecture are:
Title Application Note #
No related application notes at this time.
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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DS39504A-page 4-16 2000 Microchip Technology Inc.
4.7 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Architecture description.
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2000 Microchip Technology Inc. DS39505A-page 5-1
CPU and ALU
5
Section 5. CPU and ALU
HIGHLIGHTS
This section of the manual contains the following major topics:
5.1 Introduction .................................................................................................................... 5-2
5.2 General Instruction Format ............................................................................................ 5-6
5.3 Central Processing Unit (CPU) ...................................................................................... 5-7
5.4 Instruction Clock ............................................................................................................ 5-8
5.5 Arithmetic Logical Unit (ALU)......................................................................................... 5-9
5.6 STATUS Register ......................................................................................................... 5-11
5.7 Design Tips.................................................................................................................. 5-14
5.8 Related Application Notes............................................................................................ 5-15
5.9 Revision History........................................................................................................... 5-16
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DS39505A-page 5-2 2000 Microchip Technology Inc.
5.1 Introduction
The Central Processing Unit (CPU) is responsible for using the information in the program memory
(instructions) to control the operation of the device. Many of these instructions operate on
data memory. To operate on data memory, the Arithmetic Logical Unit (ALU) is required. In addition
to performing arithmetical and logical operations, the ALU controls the state of the status bits,
which are found in the STATUS register. The result of some instructions force status bits to a
value depending on the state of the result.
The machine codes that the CPU recognizes are shown in Table 5-1, as well as the instruction
mnemonics that the MPASM uses to generate these codes.
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Section 5. CPU and ALU
CPU and ALU
5
Table 5-1: PIC18CXXX Instruction Set
Mnemonic,
Operands Description Cycles (4) 16-Bit Instruction Word Status
Affected Notes
MSb LSb
BYTE-ORIENTED FILE REGISTER OPERATIONS
ADDWF
ADDWFC
ANDWF
CLRF
COMF
CPFSEQ
CPFSGT
CPFSLT
DECF
DECFSZ
DCFSNZ
INCF
INCFSZ
INFSNZ
IORWF
MOVF
MOVFF
MOVWF
MULWF
NEGF
RLCF
RLNCF
RRCF
RRNCF
SETF
SUBFWB
SUBWF
SUBWFB
SWAPF
TSTFSZ
XORWF
f, d, a
f, d, a
f, d, a
f, a
f, d, a
f, a
f, a
f, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
fs, fd
f, a
f, a
f, a
f, d, a
f, d, a
f, d, a
f, d, a
f, a
f, d, a
f, d, a
f, d, a
f, d, a
f, a
f, d, a
Add WREG and f
Add WREG and Carry bit to f
AND WREG with f
Clear f
Complement f
Compare f with WREG, skip =
Compare f with WREG, skip >
Compare f with WREG, skip <
Decrement f
Decrement f, Skip if 0
Decrement f, Skip if Not 0
Increment f
Increment f, Skip if 0
Increment f, Skip if Not 0
Inclusive OR WREG with f
Move f
Move fs (source) to
fd (destination)
Move WREG to f
Multiply WREG with f
Negate f
Rotate Left f through Carry
Rotate Left f (No Carry)
Rotate Right f through Carry
Rotate Right f (No Carry)
Set f
Subtract f from WREG with
Subtract WREG from f
Subtract WREG from f with
Swap nibbles in f
Test f, skip if 0
Exclusive OR WREG with f
1
1
1
1
1
1 (2 or 3)
1 (2 or 3)
1 (2 or 3)
1
1 (2 or 3)
1 (2 or 3)
1
1 (2 or 3)
1 (2 or 3)
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1 (2 or 3)
1
0010
0010
0001
0110
0001
0110
0110
0110
0000
0010
0100
0010
0011
0100
0001
0101
1100
1111
0110
0000
0110
0011
0100
0011
0100
0110
0101
0101
0101
0011
0110
0001
01da
00da
101a
11da
11da
001a
010a
000a
01da
11da
11da
10da
11da
10da
00da
00da
ffff
ffff
111a
001a
110a
01da
01da
00da
00da
100a
01da
11da
10da
10da
011a
10da
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
C, DC, Z, OV, N
C, DC, Z, OV, N
Z, N
Z, N
Z, N
None
None
None
C, DC, Z, OV, N
None
None
C, DC, Z, OV, N
None
None
Z
Z
None
None
None
C, DC, Z, OV, N
C, DC, Z, N
C, DC, Z, N
C, DC, Z, N
C, DC, Z, N
None
C, DC, Z, OV, N
C, DC, Z, OV, N
C, DC, Z, OV, N
None
None
Z, N
1, 2
1, 2
1,2
2
1, 2
4
4
1, 2
1, 2, 3, 4
1, 2, 3, 4
1, 2
1, 2, 3, 4
4
1, 2
1, 2
1, 2
1, 2
1, 2
1, 2
4
1, 2
BIT-ORIENTED FILE REGISTER OPERATIONS
BCF
BSF
BTFSC
BTFSS
BTG
f, b, a
f, b, a
f, b, a
f, b, a
f, d, a
Bit Clear f
Bit Set f
Bit Test f, Skip if Clear
Bit Test f, Skip if Set
Bit Toggle f
1
1
1 (2 or 3)
1 (2 or 3)
1
1001
1000
1011
1010
0111
bbba
bbba
bbba
bbba
bbba
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
None
None
None
None
None
1, 2
1, 2
3, 4
3, 4
1, 2
Note 1: When an I/O register is modified as a function of itself (e.g., MOVF PORTB, 1, 0), the value used will be that
value present on the pins themselves. For example, if the data latch is '1' for a pin configured as input and is driven
low by an external device, the data will be written back with a '0'.
2: If this instruction is executed on the TMR0 register (and, where applicable, d = 1), the prescaler will be cleared if
assigned to the Timer0 Module.
3: If Program Counter (PC) is modified or a conditional test is true, the instruction requires two cycles. The second
cycle is executed as a NOP.
4: Some instructions are 2 word instructions. The second word of these instructions will be executed as a NOP, unless
the first word retrieves the information embedded in these 16 bits. This ensures that all program memory locations
have a valid instruction.
5: If the Table Write starts the write cycle to internal memory, the write will continue until terminated.
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DS39505A-page 5-4 2000 Microchip Technology Inc.
CONTROL OPERATIONS
BC
BN
BNC
BNN
BNOV
BNZ
BOV
BRA
BZ
CALL
CLRWDT
DAW
GOTO
NOP
NOP
POP
PUSH
RCALL
RESET
RETFIE
RETLW
RETURN
SLEEP
TBLRD
TBLWT
n
n
n
n
n
n
n
n
n
n, s
—
—
n
—
—
—
—
n
s
k
s
—
m
m
Branch if Carry
Branch if Negative
Branch if Not Carry
Branch if Not Negative
Branch if Not Overflow
Branch if Not Zero
Branch if Overflow
Branch Unconditionally
Branch if Zero
Call subroutine 1st word
2nd word
Clear Watchdog Timer
Decimal Adjust WREG
Go to address 1st word
2nd word
No Operation
No Operation (4)
Pop top of return stack (TOS)
Push top of return stack
(TOS)
Relative Call
Software device RESET
Return from interrupt enable
Return with literal in WREG
Return from Subroutine
Go into standby mode
Table Read * → mm = 00
*+ → mm = 01
*- → mm = 10
+* → mm = 11
Table Write * → mm = 00
*+ → mm = 01
*- → mm = 10
+* → mm = 11
1 (2)
1 (2)
1 (2)
1 (2)
1 (2)
2
1 (2)
1 (2)
1 (2)
2
1
1
2
1
1
1
1
2
1
2
2
2
1
2
2
1110
1110
1110
1110
1110
1110
1110
1101
1110
1110
1111
0000
0000
1110
1111
0000
1111
0000
0000
1101
0000
0000
0000
0000
0000
0000
0000
0010
0110
0011
0111
0101
0001
0100
0nnn
0000
110s
kkkk
0000
0000
1111
kkkk
0000
xxxx
0000
0000
1nnn
0000
0000
1100
0000
0000
0000
0000
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
kkkk
kkkk
0000
0000
kkkk
kkkk
0000
xxxx
0000
0000
nnnn
1111
0001
kkkk
0001
0000
0000
0000
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
kkkk
kkkk
0100
0111
kkkk
kkkk
0000
xxxx
0110
0101
nnnn
1111
000s
kkkk
001s
0011
10mm
11mm
None
None
None
None
None
None
None
None
None
None
TO, PD
C
None
None
None
None
None
None
All
GIEH, GIEL
None
None
TO, PD
None
None
5
Table 5-1: PIC18CXXX Instruction Set (Continued)
Mnemonic,
Operands Description Cycles (4) 16-Bit Instruction Word Status
Affected Notes
MSb LSb
Note 1: When an I/O register is modified as a function of itself (e.g., MOVF PORTB, 1, 0), the value used will be that
value present on the pins themselves. For example, if the data latch is '1' for a pin configured as input and is driven
low by an external device, the data will be written back with a '0'.
2: If this instruction is executed on the TMR0 register (and, where applicable, d = 1), the prescaler will be cleared if
assigned to the Timer0 Module.
3: If Program Counter (PC) is modified or a conditional test is true, the instruction requires two cycles. The second
cycle is executed as a NOP.
4: Some instructions are 2 word instructions. The second word of these instructions will be executed as a NOP, unless
the first word retrieves the information embedded in these 16 bits. This ensures that all program memory locations
have a valid instruction.
5: If the Table Write starts the write cycle to internal memory, the write will continue until terminated.
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2000 Microchip Technology Inc. DS39505A-page 5-5
Section 5. CPU and ALU
CPU and ALU
5
LITERAL OPERATIONS
ADDLW
ANDLW
IORLW
MOVLB
LFSR
MOVLW
MULLW
RETLW
SUBLW
XORLW
k
k
k
k
f, k
k
k
k
k
k
Add literal and WREG
AND literal with WREG
Inclusive OR literal with
WREG
Move literal to BSR<3:0>
Move literal (12-bit) to FSRx
2nd word
Move literal to WREG
Multiply literal with WREG
Return with literal in WREG
Subtract WREG from literal
Exclusive OR literal with
WREG
1
1
1
1
2
1
1
2
1
1
0000
0000
0000
0000
1110
1111
0000
0000
0000
0000
0000
1111
1011
1001
0001
1110
0000
1110
1101
1100
1000
1010
kkkk
kkkk
kkkk
0000
00ff
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
C, DC, Z, OV, N
Z, N
Z, N
None
None
None
None
None
C, DC, Z, OV, N
Z, N
Table 5-1: PIC18CXXX Instruction Set (Continued)
Mnemonic,
Operands Description Cycles (4) 16-Bit Instruction Word Status
Affected Notes
MSb LSb
Note 1: When an I/O register is modified as a function of itself (e.g., MOVF PORTB, 1, 0), the value used will be that
value present on the pins themselves. For example, if the data latch is '1' for a pin configured as input and is driven
low by an external device, the data will be written back with a '0'.
2: If this instruction is executed on the TMR0 register (and, where applicable, d = 1), the prescaler will be cleared if
assigned to the Timer0 Module.
3: If Program Counter (PC) is modified or a conditional test is true, the instruction requires two cycles. The second
cycle is executed as a NOP.
4: Some instructions are 2 word instructions. The second word of these instructions will be executed as a NOP, unless
the first word retrieves the information embedded in these 16 bits. This ensures that all program memory locations
have a valid instruction.
5: If the Table Write starts the write cycle to internal memory, the write will continue until terminated.
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PIC18C Reference Manual
DS39505A-page 5-6 2000 Microchip Technology Inc.
5.2 General Instruction Format
The Enhanced family instructions can be broken down into five general formats as shown in
Figure 5-1. As can be seen, the opcode for the instruction varies from 4 bits to 8 bits. This variable
opcode size is what allows 77 instructions to be implemented.
Figure 5-1: General Format for Instructions
Byte-oriented file register operations
15 10 9 8 7 0
d = 0 for result destination to be WREG register
OPCODE d a f (FILE #)
d = 1 for result destination to be file register (f)
a = 0 to force Access Bank
Bit-oriented file register operations
15 12 11 9 8 7 0
OPCODE b (BIT #) a f (FILE #)
b = 3-bit position of bit in file register (f)
Literal operations
15 8 7 0
OPCODE k (literal)
k = 8-bit immediate value
Byte to Byte move operations (2-word)
15 12 11 0
OPCODE f (Source FILE #)
CALL, GOTO and Branch operations
15 8 7 0
OPCODE n<7:0> (literal)
n = 20-bit immediate value
a = 1 for BSR to select bank
f = 8-bit file register address
a = 0 to force Access Bank
a = 1 for BSR to select bank
f = 8-bit file register address
15 12 11 0
1111 n<19:8> (literal)
15 12 11 0
1111 f (Destination FILE #)
f = 12-bit file register address
Control operations
Example Instruction
ADDWF MYREG, W, a
MOVFF MYREG1, MYREG2
BSF MYREG, bit, a
MOVLW 0x7F
GOTO Label
15 8 7 0
OPCODE n<7:0> (literal)
15 12 11 0
CALL MYFUNC
15 11 10 0
OPCODE n<10:0> (literal)
S = Fast bit
BRA MYFUNC
15 8 7 0
OPCODE n<7:0> (literal) BC MYFUNC
S
1111 n<19:8> (literal)
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Section 5. CPU and ALU
CPU and ALU
5
5.3 Central Processing Unit (CPU)
The CPU can be thought of as the “brains” of the device. It is responsible for fetching the correct
instruction for execution, decoding that instruction and then executing that instruction.
The CPU sometimes works in conjunction with the ALU to complete the execution of the instruction
(in arithmetic and logical operations).
The CPU controls the program memory address bus, the data memory address bus and
accesses to the stack.
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DS39505A-page 5-8 2000 Microchip Technology Inc.
5.4 Instruction Clock
There are three oscillator clock sources from which the device can operate. These are
1. External System Clock (TOSC)
2. Phase Lock Loop (PLL)
3. Timer1 Oscillator (TT1P)
Figure 5-2 shows these clock inputs and the device clock output (TSCLK). TSCLK is the system
clock. Four TSCLK cycles are an instruction cycle (TCY).
The external system clock (TOSC) goes into the device and is input into a multiplexer anda4x
Phase Lock Loop (PLL). The output of the PLL also enters the multiplexer and has a name
TOSC/4. Some devices may also have an alternate oscillator called Timer1 oscillator (see
“Timer1” section), which can provide another system clock. Timer1 has a cycle time called TT1P.
This clock source also enters into the multiplexer.
Figure 5-2: Device Clock Sources
Each instruction cycle (TCY) is comprised of four Q cycles (Q1-Q4). The Q cycle time is the same
as the system clock cycle time (TSCLK). The Q cycles provide the timing/designation for the
Decode, Read, Process Data, Write, etc., of each instruction cycle.
The four Q cycles that make up an instruction cycle (TCY) are shown in Figure 5-3. The relationship
of the Q cycles to the instruction cycle can be generalized as:
Q1: Instruction Decode Cycle or forced No Operation (NOP)
Q2: Instruction Read Data Cycle or No Operation (NOP)
Q3: Process the Data
Q4: Instruction Write Data Cycle or No Operation (NOP)
Each instruction description will show a detailed Q cycle operation for the instruction.
Figure 5-3: Q Cycle Activity
PIC18CXXX
OSC1
PLL
TSCLK
Clock
Source MUX
TOSC/4
T1OSI
TOSC
TT1P
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
TCY1 TCY2 TCY3
TDOSC
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Section 5. CPU and ALU
CPU and ALU
5
5.5 Arithmetic Logical Unit (ALU)
PICmicro devices contain an 8-bit ALU and an 8-bit working register (WREG). The ALU is a general
purpose arithmetic and logical unit. It performs arithmetic and Boolean functions between
the data in the working register and any register file. The WREG register is directly addressable
and in the SFR memory map.
Figure 5-4: Operation of the ALU and WREG Register
The ALU is 8-bits wide and is capable of addition, subtraction, multiplication, shift and logical
operations. Unless otherwise mentioned, arithmetic operations are two's complement in nature.
In two-operand instructions, typically one operand is the working register (WREG register). The
other operand is a file register or an immediate constant. In single operand instructions, the operand
is either the WREG register or a file register.
The 8x8 multiplier operates in a single cycle, placing the 16-bit result in the PRODH:PRODL
register pair.
Depending on the instruction executed, the ALU may affect the values of the Carry (C), Digit
Carry (DC), Zero (Z), Overflow (OV), and Negative (N) bits in the STATUS register. The C and
DC bits operate as a borrow bit and a digitborrow out bit, respectively, in subtraction. See the
SUBLW and SUBWF instructions in the “Instruction Set” section for examples.
WREG Register
Register
File
8
d bit, or from instruction
8
8
8-bit literal
(from instruction word)
(SFR’s)
and
General
Purpose
RAM
ALU (GPR)
8
8
Special
Function
Registers
8-bit register value
(from direct or indirect
address of instruction)
STATUS Register
C bit
N, OV, Z,
DC, and C bits
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PIC18C Reference Manual
DS39505A-page 5-10 2000 Microchip Technology Inc.
5.5.1 Signed Math
Signed arithmetic is comprised of a magnitude and a sign bit. The overflow bit indicates if the
magnitude overflows and causes the sign bit to change state when the result of an 8-bit signed
operation is greater than 127 (7Fh) or less than -128 (80h).
Signed math can have greater than 7-bit values (magnitude), if more than one byte is used. The
overflow bit only operates on bit6 (MSb of magnitude) and bit7 (sign bit) of each byte value in the
ALU. That is, the overflow bit is not useful if trying to implement signed math where the magnitude,
for example, is 11 bits.
If the signed math values are greater than 7 bits (such as 15, 24 or 31 bits), the algorithm must
ensure that the low order bytes of the signed value ignore the overflow status bit.
Example 5-1 shows two cases of doing signed arithmetic. The Carry (C) bit and the Overflow
(OV) bit are the most important status bits for signed math operations.
Example 5-1: 8-bit Math Addition
Case 1:
The Negative bit is used to indicate if the MSb of the result is set or cleared.
Hex Value Signed Values Unsigned Values
FFh
+ 01h
= 00h
C bit = 1
OV bit = 0
DC bit = 1
Z bit = 1
N bit = 0
-1
+ 1
= 0 (FEh)
C bit = 1
OV bit = 0
DC bit = 1
Z bit = 1
N bit = 0
255
+ 1
= 256 → 00h
C bit = 1
OV bit = 0
DC bit = 1
Z bit = 1
N bit = 0
Case 2:
Hex Value Signed Values Unsigned Values
7Fh
+ 01h
= 80h
C bit = 0
OV bit = 1
DC bit = 1
Z bit = 0
N bit = 1
127
+ 1
= 128 → 00h
C bit = 0
OV bit = 1
DC bit = 1
Z bit = 0
N bit = 1
127
+ 1
= 128
C bit = 0
OV bit = 1
DC bit = 1
Z bit = 0
N bit = 1
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2000 Microchip Technology Inc. DS39505A-page 5-11
Section 5. CPU and ALU
CPU and ALU
5
5.6 STATUS Register
The STATUS register, shown in Register 5-1, contains the arithmetic status of the ALU. The
STATUS register can be the destination for any instruction, as with any other register. If the
STATUS register is the destination for an instruction that affects the Z, DC, C, OV or N bits, then
the write to these five bits is disabled. These bits are set or cleared according to the device logic.
Therefore, the result of an instruction with the STATUS register as destination may be different
than intended.
For example, CLRF STATUS will clear the upper three bits and set the Z bit. This leaves the
STATUS register as 000u u1uu (where u = unchanged).
It is recommended, therefore, that only BCF, BSF, SWAPF, MOVFF, and MOVWF instructions
are used to alter the STATUS register, because these instructions do not affect the Z, C, DC, OV
or N bits of the STATUS register. For other instructions, not affecting any status bits, see
Table 5-1.
Note 1: The C and DC bits operate as a borrow and digitborrow bit, respectively, in subtraction.
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PIC18C Reference Manual
DS39505A-page 5-12 2000 Microchip Technology Inc.
Register 5-1: STATUS Register
U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x
— — — N OV Z DC C
bit 7 bit 0
bit 7-5 Unimplemented: Read as '0'
bit 4 N: Negative bit
This bit is used for signed arithmetic (2’s complement). It indicates whether the result was negative,
(ALU MSb = 1).
1 = Result was negative
0 = Result was positive
bit 3 OV: Overflow bit
This bit is used for signed arithmetic (2’s complement). It indicates an overflow of the 7-bit magnitude,
which causes the sign bit (bit7) to change state.
1 = Overflow occurred for signed arithmetic (in this arithmetic operation)
0 = No overflow occurred
bit 2 Z: Zero bit
1 = The result of an arithmetic or logic operation is zero
0 = The result of an arithmetic or logic operation is not zero
bit 1 DC: Digit carry/borrow bit
For ADDWF, ADDLW, SUBLW, and SUBWF instructions
1 = A carry-out from the 4th low order bit of the result occurred
0 = No carry-out from the 4th low order bit of the result
Note: For borrow, the polarity is reversed. A subtraction is executed by adding the 2’s complement
of the second operand. For rotate (RRF, RLF) instructions, this bit is loaded
with either the bit4 or bit3 of the source register.
bit 0 C: Carry/borrow bit
For ADDWF, ADDLW, SUBLW, and SUBWF instructions
1 = A carry-out from the most significant bit of the result occurred
0 = No carry-out from the most significant bit of the result occurred
Note: For borrow, the polarity is reversed. A subtraction is executed by adding the 2’s complement
of the second operand. For rotate (RRF, RLF) instructions, this bit is loaded
with either the high or low order bit of the source register.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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2000 Microchip Technology Inc. DS39505A-page 5-13
Section 5. CPU and ALU
CPU and ALU
5
5.6.1 RCON Register
The Reset Control (RCON) register contains flag bit(s) that allow the user to differentiate
between the device resets.
Register 5-2: RCON Register
Note 1: If the BOREN configuration bit is set, BOR is ’0’ on Power-on Reset. If the BOREN
configuration bit is clear, BOR is unknown on Power-on Reset.
The BOR status bit is a "don't care" and is not necessarily predictable if the
brown-out circuit is disabled (the BOREN configuration bit is clear).
2: It is recommended that the POR bit be set after a Power-on Reset has been
detected, so that subsequent Power-on Resets may be detected.
R/W-0 R/W-0 U-0 R/W-1 R/W-1 R/W-1 R/W-0 R/W-0
IPEN LWRT — RI TO PD POR BOR
bit 7 bit 0
bit 7 IPEN: Interrupt Priority Enable bit
This bit reflects the value of the MPEEN configuration bit.
1 = Enable priority levels on interrupts
0 = Disable priority levels on interrupts (PIC16CXXX compatibility mode)
bit 6 LWRT: Long Write Enable
1 = Enable Table Writes to internal program memory
Once this bit is set, it can only be cleared by a POR or MCLR reset.
0 = Disable Table Writes to internal program memory; Table Writes only to external program
memory
bit 5 Unimplemented: Read as '0'
bit 4 RI: Reset Instruction Flag bit
1 = The Reset instruction was not executed to cause the device reset
0 = The Reset instruction was executed
(must be set in software after a Brown-out Reset occurs)
bit 3 TO: Watchdog Time-out Flag bit
1 = After Power-up, CLRWDT instruction, or SLEEP instruction
0 = A WDT time-out occurred
bit 2 PD: Power-down Detection Flag bit
1 = After Power-up or by the CLRWDT instruction
0 = By execution of the SLEEP instruction
bit 1 POR: Power-on Reset Status bit
1 = A Power-on Reset has not occurred
0 = A Power-on Reset occurred
(After a Power-on Reset occurs, this bit must be set in software to detect subsequent
occurrences of Power-on Reset.
bit 0 BOR: Brown-out Reset Status bit
1 = A Brown-out Reset has not occurred
0 = A Brown-out Reset occurred
(must be set in software after a Brown-out Reset occurs)
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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PIC18C Reference Manual
DS39505A-page 5-14 2000 Microchip Technology Inc.
5.7 Design Tips
Question 1: My program algorithm does not seem to function correctly.
Answer 1:
There are many possible reasons for this. A couple of possibilities are:
1. The destination of the instruction may be specifying the WREG register (d = 0) instead of
the file register (d = 1).
2. The access bit may be specifying the Virtual RAM Bank instead of the desired bank of
RAM.
When possible, the use of an In-Circuit Emulator (such as MPLAB-ICE) or a simulator (such as
MPLAB-SIM) can assist in locating the reason for the unexpected execution flow.
Question 2: I cannot seem to modify the STATUS register flags.
Answer 2:
If the STATUS register is the destination for an instruction that affects the Z, DC, C, OV or N bits,
then the write to those bits is disabled. These bits are set or cleared based on device logic. Therefore,
to modify bits in the STATUS register, it is recommended to use the BCF and BSF instructions.
39500 18C Reference Manual.book Page 14 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39505A-page 5-15
Section 5. CPU and ALU
CPU and ALU
5
5.8 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is they may be written for
the Base-Line, the Mid-Range or High-End families), but the concepts are pertinent and could be
used (with modification and possible limitations). The current application notes related to the
CPU or the ALU are:
Title Application Note #
IEEE 754 Compliant Floating Point Routines AN575
Fixed Point Routines AN617
Floating Point Math Functions AN660
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
39500 18C Reference Manual.book Page 15 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39505A-page 5-16 2000 Microchip Technology Inc.
5.9 Revision History
Revision A
This is the initial released revision of the Enhanced MCU CPU and ALU description.
39500 18C Reference Manual.book Page 16 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39506-page 6-1
Hardware 8x8
Multiplier
6
Section 6. Hardware 8x8 Multiplier
HIGHLIGHTS
This section of the manual contains the following major topics:
6.1 Introduction .................................................................................................................... 6-2
6.2 Operation ....................................................................................................................... 6-3
6.3 Design Tips .................................................................................................................... 6-6
6.4 Related Application Notes.............................................................................................. 6-7
6.5 Revision History ............................................................................................................. 6-8
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PIC18C Reference Manual
DS39506-page 6-2 2000 Microchip Technology Inc.
6.1 Introduction
An 8 x 8 hardware multiplier is included in the ALU of the devices. By making the multiplication
a hardware operation, it completes in a single instruction cycle. This is an unsigned multiplication
that gives a 16-bit result. The result is stored into the 16-bit Product register (PRODH:PRODL).
The multiplier does not affect any flags in the ALUSTA register.
Making the 8 x 8 multiplier execute in a single cycle gives the following advantages:
• Higher computational throughput
• Reduces code size requirements for multiplication algorithms
The performance increase allows the device to be used in applications previously reserved for
Digital Signal Processors.
Table 6-1 shows a performance comparison between devices using the single cycle hardware
multiplier and performing the same function without the hardware multiplier.
Table 6-1: Performance Comparison
Routine Multiply Method
Program
Memory
(Words)
Cycles
(Max)
Time
@ 40 MHz @ 10 MHz @ 4 MHz
8 x 8 unsigned Without hardware multiplier 13 69 6.9 µs 27.6 µs 69 µs
Hardware multiply 1 1 100 ns 400 ns 1 µs
8 x 8 signed Without hardware multiplier 33 91 9.1 µs 36.4 µs 91 µs
Hardware multiply 6 6 600 ns 2.4 µs 6 µs
16 x 16 unsigned Without hardware multiplier 21 242 24.2 µs 96.8 µs 242 µs
Hardware multiply 24 24 2.4 µs 9.6 µs 24 µs
16 x 16 signed Without hardware multiplier 52 254 25.4 µs 102.6 µs 254 µs
Hardware multiply 36 36 3.6 µs 14.4 µs 36 µs
39500 18C Reference Manual.book Page 2 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39506-page 6-3
Section 6. Hardware 8x8 Multiplier
Hardware 8x8
Multiplier
6
6.2 Operation
Example 6-1 shows the sequence to do an 8 x 8 unsigned multiply. Only one instruction is
required when one argument of the multiply is already loaded in the WREG register.
Example 6-2 shows the sequence to do an 8 x 8 signed multiply. To account for the sign bits of
the arguments, each argument’s most significant bit (MSb) is tested and the appropriate subtractions
are done.
Example 6-1: 8 x 8 Unsigned Multiply Routine
Example 6-2: 8 x 8 Signed Multiply Routine
Example 6-3 shows the sequence to do a 16 x 16 unsigned multiply. Equation 6-1 shows the
algorithm that is used. The 32-bit result is stored in four registers, RES3, RES2, RES1 and RES0.
Equation 6-1: 16 x 16 Unsigned Multiplication Algorithm
MOVFF ARG1, WREG ;
MULWF ARG2 ; ARG1 * ARG2 ->
; PRODH:PRODL
MOVFF ARG1, WREG
MULWF ARG2 ; ARG1 * ARG2 ->
; PRODH:PRODL
BTFSC ARG2, SB ; Test Sign Bit
SUBWF PRODH, F ; PRODH = PRODH
; - ARG1
MOVFF ARG2, WREG
BTFSC ARG1, SB ; Test Sign Bit
SUBWF PRODH, F ; PRODH = PRODH
; - ARG2
RES3:RES2:RES1:RES0 = ARG1H:ARG1L • ARG2H:ARG2L
= (ARG1H • ARG2H • 2 16)+
(ARG1H • ARG2L • 2 8)+
(ARG1L • ARG2H • 2 8)+
(ARG1L • ARG2L)
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PIC18C Reference Manual
DS39506-page 6-4 2000 Microchip Technology Inc.
Example 6-3: 16 x 16 Unsigned Multiply Routine
Example 6-4 shows the sequence to do a 16 x 16 signed multiply. Equation 6-2 shows the algorithm
used. The 32-bit result is stored in four registers, RES3, RES2, RES1 and RES0. To
account for the sign bits of the arguments, each argument pairs’ most significant bit (MSb) is
tested and the appropriate subtractions are done.
Equation 6-2: 16 x 16 Signed Multiplication Algorithm
MOVFF ARG1L, WREG
MULWF ARG2L ; ARG1L * ARG2L ->
; PRODH:PRODL
MOVFF PRODH, RES1 ;
MOVFF PRODL, RES0 ;
;
MOVFF ARG1H, WREG
MULWF ARG2H ; ARG1H * ARG2H ->
; PRODH:PRODL
MOVFF PRODH, RES3 ;
MOVFF PRODL, RES2 ;
;
MOVFF ARG1L, WREG
MULWF ARG2H ; ARG1L * ARG2H ->
; PRODH:PRODL
MOVFF PRODL, WREG ;
ADDWF RES1, F ; Add cross
MOVFF PRODH, WREG ; products
ADDWFC RES2, F ;
CLRF WREG, F ;
ADDWFC RES3, F ;
;
MOVFF ARG1H, WREG ;
MULWF ARG2L ; ARG1H * ARG2L ->
; PRODH:PRODL
MOVFF PRODL, WREG ;
ADDWF RES1, F ; Add cross
MOVFF PRODH, WREG ; products
ADDWFC RES2, F ;
CLRF WREG, F ;
ADDWFC RES3, F ;
RES3:RES2:RES1:RES0
= ARG1H:ARG1L • ARG2H:ARG2L
= (ARG1H • ARG2H • 2 16) +
(ARG1H • ARG2L • 2 8) +
(ARG1L • ARG2H • 2 8) +
(ARG1L • ARG2L) +
(-1 • ARG2H<7> • ARG1H:ARG1L • 2 16)+
(-1 • ARG1H<7> • ARG2H:ARG2L • 2 16)
39500 18C Reference Manual.book Page 4 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39506-page 6-5
Section 6. Hardware 8x8 Multiplier
Hardware 8x8
Multiplier
6
Example 6-4: 16 x 16 Signed Multiply Routine
MOVFF ARG1L, WREG
MULWF ARG2L ; ARG1L * ARG2L ->
; PRODH:PRODL
MOVFF PRODH, RES1 ;
MOVFF PRODL, RES0 ;
;
MOVFF ARG1H, WREG
MULWF ARG2H ; ARG1H * ARG2H ->
; PRODH:PRODL
MOVFF PRODH, RES3 ;
MOVFF PRODL, RES2 ;
;
MOVFF ARG1L, WREG
MULWF ARG2H ; ARG1L * ARG2H ->
; PRODH:PRODL
MOVFF PRODL, WREG ;
ADDWF RES1, F ; Add cross
MOVFF PRODH, WREG ; products
ADDWFC RES2, F ;
CLRF WREG, F ;
ADDWFC RES3, F ;
;
MOVFF ARG1H, WREG ;
MULWF ARG2L ; ARG1H * ARG2L ->
; PRODH:PRODL
MOVFF PRODL, WREG ;
ADDWF RES1, F ; Add cross
MOVFF PRODH, WREG ; products
ADDWFC RES2, F ;
CLRF WREG, F ;
ADDWFC RES3, F ;
;
BTFSS ARG2H, 7 ; ARG2H:ARG2L neg?
GOTO SIGN_ARG1 ; no, check ARG1
MOVFF ARG1L, WREG ;
SUBWF RES2 ;
MOVFF ARG1H, WREG ;
SUBWFB RES3
;
SIGN_ARG1
BTFSS ARG1H, 7 ; ARG1H:ARG1L neg?
GOTO CONT_CODE ; no, done
MOVFF ARG2L, WREG ;
SUBWF RES2 ;
MOVFF ARG2H, WREG ;
SUBWFB RES3
;
CONT_CODE
:
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DS39506-page 6-6 2000 Microchip Technology Inc.
6.3 Design Tips
None.
39500 18C Reference Manual.book Page 6 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39506-page 6-7
Section 6. Hardware 8x8 Multiplier
Hardware 8x8
Multiplier
6
6.4 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is, they may be written for
the Base-Line, the Mid-Range, or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to the
H/W Multiplier modules are:
Title Application Note #
IEEE 754 Compliant Floating Point Routines AN575
Fixed Point Routines AN617
Floating Point Math Functions AN660
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
39500 18C Reference Manual.book Page 7 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39506-page 6-8 2000 Microchip Technology Inc.
6.5 Revision History
Revision A
This is the initial released revision of the Enhanced MCE Hardware Multiplier module description.
39500 18C Reference Manual.book Page 8 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39507A-page 7-1
Memory
7
Section 7. Memory Organization
HIGHLIGHTS
This section of the manual contains the following major topics:
7.1 Introduction .................................................................................................................... 7-2
7.2 Program Memory ........................................................................................................... 7-3
7.3 Program Counter (PC) ................................................................................................... 7-6
7.4 Lookup Tables................................................................................................................ 7-9
7.5 Stack ............................................................................................................................ 7-12
7.6 Data Memory Organization.......................................................................................... 7-13
7.7 Return Address Stack .................................................................................................. 7-17
7.8 Initialization .................................................................................................................. 7-23
7.9 Design Tips .................................................................................................................. 7-24
7.10 Related Application Notes............................................................................................ 7-25
7.11 Revision History ........................................................................................................... 7-26
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DS39507A-page 7-2 2000 Microchip Technology Inc.
7.1 Introduction
There are two memory blocks in the memory map; program memory and data memory. Each
block has its own bus, so that access to each block can occur during the same instruction cycle.
The data memory can further be broken down into General Purpose RAM and the Special Function
Registers (SFRs). The operation of the SFRs that control the “core” are described here. The
SFRs used to control the peripheral modules are described in the section discussing each individual
peripheral module.
In addition, there are other registers used that are neither part of the program nor data memory
spaces. These registers are not directly addressable and include:
• return address stack
• fast return stack
Table 7-1 shows the program memory space used depending on the memory allocated, and
Table 7-2 shows the data memory space used.
Table 7-1: PIC18CXXX Program
Memory Ranges
Table 7-2: PIC18CXXX Data
Memory Ranges
Program
Memory
Program Memory
Address Range Data Memory Banks
1K x 8 0000h - 3FFh 64 0, 15
2K x 8 0000h - 7FFh 128 0, 15
4K x 8 0000h - FFFh 256 0, 15
8K x 8 0000h - 1FFFh 512 0-1, 15
12K x 8 0000h - 2FFFh 640 0-2, 15
16K x 8 0000h - 3FFFh 768 0-2, 15
24K x 8 0000h - 5FFFh 1024 0-3, 15
32K x 8 0000h - 7FFFh 1280 0-4, 15
48K x 8 0000h - BFFFh 1536 0-5,15
64K x 8 0000h - FFFFh 1792 0-6, 15
96K x 8 0000h - 17FFFh 2048 0-7, 15
128K x 8 0000h - 1FFFFh 2304 0-8, 15
160K x 8 0000h - 27FFFh 2560 0-9, 15
192K x 8 0000h - 2FFFFh 2816 0-10, 15
256K x 8 0000h - 3FFFFh 3072 0-11, 15
384K x 8 0000h - 5FFFFh 3328 0-12, 15
512K x 8 0000h - 7FFFFh 3584 0-13,15
768K x 8 0000h - BFFFFh 3840 0-14,15
1024K x 8 0000h - FFFFFh 3968 0-15
1536K x 8 0000h - 17FFFFh
2048K x 8 0000h - 1FFFFFh
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2000 Microchip Technology Inc. DS39507A-page 7-3
Section 7. Memory
Memory
7
7.2 Program Memory
Enhanced MCU devices have a 21-bit program counter capable of addressing 2 Mbytes
(1Mwords) of program memory space. The program memory contains instructions for execution
and data tables for storing fixed data. Data tables may be written once using table write instructions
and read as required, using the table read instructions.
The program space is implemented as a single contiguous block. The reset vector is at address
000000h, the high priority interrupt vector is at address 000008h, and the low priority interrupt
vector is at address 000018h (Figure 7-1).
CALL and GOTO instructions can address any location in the memory map, while the BRA and
RCALL instructions have a limited program memory reach (+1024, -1023 program memory word
locations). To allow the CALL and GOTO instructions to contain the entire address, it requires that
these instructions use 2 program memory words (2 word instruction).
Instructions are also available to move information between the data memory and the program
memory areas. These are called table operations. Table operations work with byte entities. This
is discussed in detail in the “Table Read/Table Write” section.
Figure 7-1: Program Memory Map and Stack for PIC18CXXX
PC<20:0>
Stack Level 1
Stack Level 31
Reset Vector
Low Priority Interrupt Vector
CALL,BSUB,RETURN
RETFIE,RETLW
21
0000h
0018h
On-chip
High Priority Interrupt Vector 0008h
User Memory Space
External/Unimplemented
1FFFFFh
200000h
Program Memory
(Read as ’0’ in
microcontroller mode)
Program Memory
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PIC18C Reference Manual
DS39507A-page 7-4 2000 Microchip Technology Inc.
7.2.1 Reset Vector
On any Enhanced MCU device, a reset forces the Program Counter (PC) to address 0h. This is
known as the “Reset Vector Address”, since this is the address that program execution will
branch to when a device reset occurs.
Any reset will also clear the contents of the PCLATU and PCLATH registers.
7.2.2 Interrupt Vectors
Two interrupt vectors are implemented; one for interrupts programmed as high priority and the
other for the interrupts programmed as low priority. The vector addresses are 08h for high priority
interrupts and 18h for low priority interrupts. If the interrupt priority is not used, all interrupts are
treated as high priority.
When an interrupt is acknowledged, the PC is forced to address 0008h or 0018h. This is known
as the “Interrupt Vector Address”. When the PC is forced to the interrupt vector, the PCLATU and
PCLATH registers are not modified. Once in the service interrupt routine (ISR), before any write
to the PC, the PCLATH register should be written with the value that will specify the desired location
in program memory. Before the PCLATH register is modified by the Interrupt Service Routine
(ISR), the contents of the PCLATH may need to be saved so it can be restored before returning
from the ISR.
7.2.3 Calibration Information
Some devices have calibration information stored in their program memory. This information is
programmed by Microchip when the device is under final test. The use of these values allows the
application to achieve better results. The calibration information is typically at the end of program
memory. These bytes can be accessed with the table read instructions.
Note: For windowed devices, write down all calibration values BEFORE erasing. This
allows the device’s calibration values to be restored when the device is re-programmed.
When possible, writing the values on the package is recommended.
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Section 7. Memory
Memory
7
7.2.4 Instructions in Program Memory
The program memory is addressed in bytes. Instructions are stored as two bytes or four bytes
in program memory. The least significant byte of an instruction word is always stored in a program
memory location with an even address (LSb = ’0’). Figure 7-2 shows an example of how
instruction words are stored in the program memory. To maintain alignment with instruction
boundaries, the PC increments in steps of 2 and the LSb will always read ’0’.
The CALL and GOTO instructions have an absolute program memory address embedded into the
instruction. Since instructions are always stored on word boundaries, the data contained in the
instruction is a word address. The word address is written to PC<20:1>, which accesses the
desired byte address in program memory. Instruction #2 in Figure 7-2 shows how the instruction
"GOTO 000006h’ is encoded in the program memory. Program branch instructions which encode
a relative address offset operate in the same manner. The offset value stored in a branch instruction
represents the number of single word instructions that the PC will be offset by. The “Instruction
Set” section provides further details of the instruction set.
Figure 7-2: Instructions in Program Memory
Word Address
High Byte Low Byte ↓
Program Memory
Byte Locations →
000000h
000002h
000004h
000006h
Instruction 1: MOVLW 055h 0Fh 55h 000008h
Instruction 2: GOTO 000006h EFh 03h 00000Ah
F0h 00h 00000Ch
Instruction 3: MOVFF 123h, 456h C1h 23h 00000Eh
F4h 56h 000010h
000012h
000014h
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7.3 Program Counter (PC)
The Program Counter (PC) specifies the address of the instruction to fetch for execution. The PC
is 21-bits wide and addresses each byte (rather than words) in the program memory. The low
byte is called the PCL register (PC<7:0>). This register is readable and writable. The high byte
is called the PCH register (PC<15:8>). This register is not directly readable or writable. Updates
to the PCH register may be performed through the PCLATH register.
The upper byte is called the PCU register (PC<20:16>). The PCU register is not directly readable
or writable. Updates to the PCU register may be performed through the PCLATU register. The
PC structure is PCU<4:0>:PCH<7:0>:PCL<7:0> and is equivalent to PC<20:0>.
Figure 7-3 shows the interaction of the PCU, PCH, and PCL registers with the PCLATU and
PCLATH registers.
Figure 7-3: Program Counter Structure
The low byte of the PC (PCL<7:0>) is mapped in the data memory. PCL is readable and writable
just as is any other register. PCU and PCH are the upper and high bytes of the PC respectively,
and are not directly addressable. Registers PCLATU<4:0> (PC upper latch) and PCLATH<7:0>
(PC high latch) are used as holding latches for the high bytes of the PCU and PCH, and are
mapped into data memory. The user can read and write PCH through PCLATH and PCU through
PCLATU. Any time PCL is read, the current contents of PCH and PCU are transferred to PCLATH
and PCLATU, respectively. Any time PCL is written to, the contents of PCLATH and PCLATU are
transferred to PCH and PCU, respectively.
The PC addresses bytes rather than words in the program memory. Because the PC must
access the instructions in program memory on an even byte boundary, the LSb of the PC is a
forced '0' and the PC increments by two for each instruction. The LSb bit of the PCL is readable
but not writable. Any write to the LSb is ignored.
Figure 7-4 shows the four situations for the loading of the PC. Situation 1 shows how the PC is
loaded on a write to PCL (PCLATH<4:0> → PCH). Situation 2 shows how the PC is loaded during
a GOTO instruction (PCLATH<4:3> → PCH). Situation 4 shows how the PC is loaded during a
CALL instruction (PCLATH<4:3> → PCH), with the PC loaded (PUSHed) onto the Top of Stack.
Situation 6 shows how the PC is loaded during one of the return instructions where the PC is
loaded (POPed) from the Top of Stack.
PC
21 15 16 0 8 7
PCLATU PCLATH
PCU PCH PCL
23 20
Reserved. Maintain these bits cleared.
Note: The values in PCLATU and PCLATH do not always reflect the current value in PCU
and PCH. When needing to modify the current Program Counter (PC) value, first
read the PCL register to update the values in the PCLATU and PCLATH registers.
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Section 7. Memory
Memory
7
Figure 7-4: Loading of PC In Different Situations
PC
ALU Result
8
PCL
Situation 1 - Instruction with PCL as destination
Situation 2 - GOTO Instruction
PCLATU PCLATH
20 8 7 0 15 PCH 16 PCU
PCL
20 8 7 0 15 PCH
16
PCU 9 1
0
K19:K8
(2nd word
K7:K0
(1st word
of instruction) of instruction)
STACK (21-bits x 31)
Top of STACK
STACK (21-bits x 31)
Top of STACK
20 8 7 0 16 1 15
ADDR
Situation 3 - BRA Instruction in Conditional Branch Instruction STACK (21-bits x 31)
Top of STACK
Offset
from
Instruction
0
PCU PCH PCL
Situation 4 - CALL Instruction
20
PCL
20 8 7 0 15
PCH
16
PCU
9 1
0
K19:K8
(2nd word
K7:K0
(1st word
STACK (21-bits x 31)
Top of STACK
of instruction) of instruction)
Note: PCLATU and PCLATH are not updated with the contents of PCH.
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Figure 7-4: Loading of PC In Different Situations (Continued)
Situation 6 - RETURN, RETFIE, or RETLW Instruction
PCL
20 8 7 0 15
PCH
16
PLU
9 1
PCLATU PCLATH
STACK (21-bits x 31)
Top of STACK
Situation 5 - RCALL Instruction
20 8 7 0 16 15 1
ADDR
Offset
from
Instruction
0
PCU PCH PCL
STACK (21-bits x 31)
Top of STACK
21
Note: PCLATU and PCLATH are not updated with the contents of PCH.
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Section 7. Memory
Memory
7
7.3.1 Computed GOTO
A computed GOTO is accomplished by adding an offset to the program counter (ADDWF PCL).
When doing a table read using a computed GOTO method, care should be exercised if the table
location crosses a PCL memory boundary (each 256 byte block) and the PCH memory boundary
(each 64Kbyte block).
A lookup table can be formed with an ADDWF PCL instruction and a group of RETLW 0xnn
instructions. WREG is loaded with an offset into the table before executing a call to that table.
The first instruction of the called routine is the ADDWF PCL instruction. The next instruction executed
will be one of the RETLW 0xnn instructions that returns the value 0xnn to the calling function.
Since the Program Counter is a byte counter (instead of a word counter), adds to the PCL allow
a table size of 128 entries before the PCLATH needs to be modified.
In this method of storing tables in PIC18CXXX devices, only one data value may be stored in
each instruction location, and room on the return address stack is required. A better method of
storing data in program memory is through the use of table reads and writes. Two bytes of data
can now be stored in each instruction location.
7.4 Lookup Tables
Look-up tables instructions are implemented two ways in the PIC18CXXX devices. The computed
goto is compatible with the PIC16CXXX and PIC17CXXX parts. Code written for those
devices will run on the PIC18CXXX devices with minor modifications.
Table read instructions are implemented on the PIC17CXXX and PIC18CXXX devices. However,
table operations on the PIC18CXXX work differently than on the PIC17CXXX.
7.4.1 Table Reads/Table Writes
Lookup table data may be stored 2 bytes per program word. By using TBLPTR and TABLAT, data
may be retrieved from program memory one byte at a time as required.
Table writes to program memory can be executed as many times as desired. Remember that the
technology of the program memory determines the outcome of the table write. Table writes to
EPROM memory allow the program memory cell to go from a ’1’ state to a ’0’ state, but not the
other direction. FLASH memory allows the cell to go from a ’1’ to a ’0’ and a ’0’ to a ’1’ (though
typically a program memory word or block location is always written).
Note: Since the Program Counter is 21-bits, the uppercase PCLATU register may also
need to be modified when doing computed gotos.
Note: Any write to the Program Counter (PCL) will cause the contents of PCLATU and
PCLATH to be loaded into PCU and PCH, respectively.
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Example 7-1: PIC18CXXX Table Lookup
Example 7-2: PIC17CXXX Table Lookup
MOVLW BYTE_COUNT ; Load the Byte Count value
MOVWF CNTR ; into CNTR
;
;; MOVLW UPPER(TBL_ADDR) ; Load the Table Address
;; MOVWF TBLPTRU ; (on POR TBLPTRU = 0, so
;; ; loading TBLPTRU is not
;; ; required for conversions)
MOVLW HIGH(TBL_ADDR) ; Load the Table Address
MOVWF TBLPTRH ;
MOVLW LOW(TBL_ADDR) ;
MOVWF TBLPTRL ;
LOOP1 TBLRD*+ ; Read value into TABLAT,
; Increment TBLPTR
MOVFF TABLAT, POSTINC0 ; Copy byte to RAM @ FSR0
; Increment FSR0
DECFSZ CNTR ; Read Byte Count locations
GOTO LOOP1 ; Read next Byte
MOVLW WORD_COUNT ; Load the Word Count value
MOVWF CNTR ; into CNTR
;
MOVLW HIGH(TBL_ADDR) ; Load the Table Address
MOVWF TBLPTRH ;
MOVLW LOW(TBL_ADDR) ;
MOVWF TBLPTRL ;
TABLRD 0, 1, DUMMY ; Dummy read,
; Updates TABLATH
; Increments TBLPTR
LOOP1 TLRD 1, INDF0 ; Read HI byte in TABLATH
TABLRD 0, 1, INDF0 ; Read LO byte in TABLATL,
; update TABLATH:TABLATL,
; and increment TBLPTR
DECFSZ CNTR ; Read Word Count locations
GOTO LOOP1 ; Read next word
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Section 7. Memory
Memory
7
Example 7-3: PIC16CXXX Table Lookup
CLRF CNTR ;
TABLELP
MOVF CNTR, W ; Place value in
; WREG register
CALL TABLE1
MOVWF INDF
INCF FSR
INCF CNTR
BTFSS CNTR, 3 ; CNTR = 00001000b?
GOTO TABLE_LP
:
:
TABLE1
ADDWF PCL ; Enusure that table does
; not cross 256 byte
; page boundary.
RETLW ’G’
RETLW ’O’
RETLW ’ ’
RETLW ’M’
RETLW ’C’
RETLW ’H’
RETLW ’P’
RETLW ’!’
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7.5 Stack
The stack allows a combination of up to 31 program calls and interrupts to occur. The stack contains
the return address from this branch in program execution.
Enhanced MCU devices have an 31-level deep x 21-bit wide hardware stack. The stack space
is not part of either program or data space and the stack pointer is not readable nor writable. The
PC is PUSHed onto the stack when a CALL instruction is executed or an interrupt causes a
branch. The stack is POPed in the event of a RETURN, RETLW or a RETFIE instruction execution.
PCLATH is not modified when the stack is PUSHed or POPed.
After the PC is PUSHed onto the stack 31 times (without POPing any values off the stack), the
32nd PUSH over-writes the value from the 31st PUSH and sets the STKFUL bit while the
STKPTR remains at 11111b. The 33rd PUSH overwrites the 32nd PUSH (and so on) while
STKPTR remains 11111b. When the stack overflow enable bit is enabled a device reset will
occur.
Figure 7-5: Stack Modification
Whenever the program branches, the return address is saved to the stack. Such branches
include CALL, RCALL, or an interrupt. The stack pointer is incremented and PC<20:1> is
PUSHed onto the return stack. PC<0> is always assumed to be 0. When a branch return is executed,
the top of the stack is POPed to the Program Counter and the stack pointer is decremented.
PCLATU and PCLATH are not affected during these branches.
The PC is word incremented by 2 after each instruction fetch during Q1 unless:
• Modified by a GOTO, CALL, RCALL, RETURN, RETLW, RETFIE, or branch instruction
• Modified by an interrupt response
• Due to a write to PCL by an instruction
Skips are equivalent to a forced NOP cycle at the skipped address.
Top of Stack (1)
STACK
STACK POINTER
11111b
00000b
Note1:The stack pointer value does not increment past 11111b.
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Section 7. Memory
Memory
7
7.6 Data Memory Organization
Data memory is made up of the Special Function Registers (SFR) area and the General Purpose
Registers (GPR) area. The SFRs are used for control and status of the microcontroller and
peripheral functions, while GPRs are the general area for user data storage and scratch pad
operations.
Each register has a 12-bit address. This allows up to 4096 bytes of data memory. This memory
is partitioned into 16 banks of 256 bytes that contain the General Purpose Registers (GPRs) and
Special Function Registers (SFRs).
The data memory can be banked for both the GPR and SFR areas. Banking requires the use of
BSR Register. Figure 7-6 shows the data memory map organizations, while Table 7-2 shows
which banks will be used depending on the memory size of the devices.
SFRs start at the last location of Bank 15 (0xFFF) and work up. Once the SFR space ends, any
lower locations in that bank may be implemented as GPRs. GPRs start at the first location of
Bank 0 (0h) and work down. Any read of an unimplemented location will read as ’0’s.
The Instruction set and architecture allows operations across all banks. To move values from one
register to another register, the MOVFF instruction can be used. This is a two word / two cycle
instruction.
The entire data memory can be accessed either directly or indirectly. Direct addressing may
require the use of the BSR register. Indirect addressing requires the use of the File Select Registers
(FSRs). Each FSR holds a 12-bit value that can access any location in the Data Memory
map.
To ensure that commonly used registers (SFRs and select GPRs) can be accessed in a single
cycle, regardless of the current BSR values, an Access Bank is implemented. This is explained
in Section 7.6.1.
The GPR area is banked to allow greater than 256 bytes of general purpose RAM to be
addressed. SFRs are for the registers that control the peripheral and core functions.
Figure 7-6: The Data Memory Map and the Access Bank
Bank 0
Bank 1
Bank 14
Bank 15
BSR<3:0> Data Memory Map
= 0000b
= 0001b
= 1110b
= 1111b
00h
FFh
00h
FFh
Access Bank
When a = 0,
the BSR is ignored and this Access
Bank is used.
The first 128 bytes are General Purpose
RAM (from Bank 0).
The second 128 bytes are Special
Function Registers (from Bank 15).
See Section 7.6.1.
When a = 1,
the BSR is used to specify the RAM
location that the instruction uses.
Bank n
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7.6.1 Access Bank
The Access Bank is an architectural enhancement that is very useful for C compiler code optimization.
The techniques used by the C compiler may also be useful for programs written in assembly.
This data memory region can be used for:
• Intermediate computational values
• Local variables of subroutines
• Faster context saving/switching of variables
• Common variables
• Faster evaluation/control of SFRs (no banking)
The Access Bank is comprised of the upper portion of Bank 15 (SFRs) and the lower portion of
Bank 0 (GPR). These two sections will be referred to as Access RAM High and Access RAM Low,
respectively. Figure 7-6 indicates the Access RAM areas. The actual size of memory used from
Bank 0 and Bank 15 depends on the specific device. When appropriate, devices will use
128 bytes from Bank 0 (GPR) and 128 bytes from Bank 15 (SFR). In larger devices with more
SFRs, the GPR Access bank size may be reduced to allocate that space to SFRs Access space.
A bit in the instruction word specifies if the operation is to occur in the bank specified by the BSR
register or in the Access Bank. This bit is denoted by the ’a’ bit (for access bit).
When forced in the Access Bank (a = ’0’), the last address in Access RAM Low is followed by the
first address in Access RAM High. Access RAM High maps the Special Function Registers so
that these registers can be accessed without any software overhead. This is useful for testing
status flags, modifying control bits, software stacks, and context saving of registers.
7.6.2 General Purpose Registers (GPR)
Enhanced MCU devices may have banked memory in the GPR area. GPRs are not initialized by
a Power-on Reset and are unchanged on all other resets.
The register file can be accessed either directly, or indirectly, using the File Select Register
(FSR). Some devices have areas that are shared across the data memory banks, so a read/write
to that area will appear as the same location (value), regardless of the current bank. We refer to
this area as the Common RAM.
Data RAM is available for use as GPR registers by all instructions. Most banks of data memory
contain only GPR registers starting with bank 0. The top half of bank 15 (0xF80 to 0xFFF) contains
SFRs.
Each data memory bank has 256 locations and can be addressed using an 8-bit address.
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Section 7. Memory
Memory
7
7.6.3 Special Function Registers
The SFRs are used by the CPU and peripheral modules for controlling the desired operation of
the device. These registers are implemented as static RAM.
The SFRs can be classified into two sets; those associated with the “core” function and those
related to the peripheral functions. Those registers related to the “core” are described in this section,
while those related to the operation of the peripheral features are described in the section
of that peripheral feature.
The SFRs are typically distributed among the peripherals whose functions they control.
If the SFRs do not use all the available locations on a particular device, the unused locations will
be unimplemented and read as '0's. In devices that have a high integration of features, some of
the SFRs may be in banks other than bank 15. See Figure 7-7 for addresses for the SFRs. As
new devices are introduced with new SFRs, this register map will be updated. Please refer to the
device data sheet for that device’s register map.
Figure 7-7: Special Function Register Map
FFFh TOSU FDFh INDF2 (2) FBFh CCPR1H F9Fh IPR1
FFEh TOSH FDEh POSTINC2 (2) FBEh CCPR1L F9Eh PIR1
FFDh TOSL FDDh POSTDEC2 (2) FBDh CCP1CON F9Dh PIE1
FFCh STKPTR FDCh PREINC2 (2) FBCh CCPR2H F9Ch —
FFBh PCLATU FDBh PLUSW2 (2) FBBh CCPR2L F9Bh —
FFAh PCLATH FDAh FSR2H FBAh CCP2CON F9Ah —
FF9h PCL FD9h FSR2L FB9h — F99h —
FF8h TBLPTRU FD8h STATUS FB8h — F98h —
FF7h TBLPTRH FD7h TMR0H FB7h — F97h —
FF6h TBLPTRL FD6h TMR0L FB6h — F96h TRISE
FF5h TABLAT FD5h T0CON FB5h — F95h TRISD
FF4h PRODH FD4h — FB4h — F94h TRISC
FF3h PRODL FD3h OSCCON FB3h TMR3H F93h TRISB
FF2h INTCON FD2h LVDCON FB2h TMR3L F92h TRISA
FF1h INTCON2 FD1h WDTCON FB1h T3CON F91h —
FF0h INTCON3 FD0h RCON FB0h — F90h —
FEFh INDF0 (2) FCFh TMR1H FAFh SPBRG F8Fh —
FEEh POSTINC0 (2) FCEh TMR1L FAEh RCREG F8Eh —
FEDh POSTDEC0 (2) FCDh T1CON FADh TXREG F8Dh LATE
FECh PREINC0 (2) FCCh TMR2 FACh TXSTA F8Ch LATD
FEBh PLUSW0 (2) FCBh PR2 FABh RCSTA F8Bh LATC
FEAh FSR0H FCAh T2CON FAAh — F8Ah LATB
FE9h FSR0L FC9h SSPBUF FA9h — F89h LATA
FE8h WREG FC8h SSPADD FA8h — F88h —
FE7h INDF1 (2) FC7h SSPSTAT FA7h — F87h —
FE6h POSTINC1 (2) FC6h SSPCON1 FA6h — F86h —
FE5h POSTDEC1 (2) FC5h SSPCON2 FA5h — F85h —
FE4h PREINC1 (2) FC4h ADRESH FA4h — F84h PORTE
FE3h PLUSW1 (2) FC3h ADRESL FA3h — F83h PORTD
FE2h FSR1H FC2h ADCON0 FA2h IPR2 F82h PORTC
FE1h FSR1L FC1h ADCON1 FA1h PIR2 F81h PORTB
FE0h BSR FC0h — FA0h PIE2 F80h PORTA
Note 1: Unimplemented-registers are read as ’0’.
2: This is not a physical register.
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7.6.4 Bank Select Register (BSR)
The need for a large general purpose memory space dictated a general purpose RAM banking
scheme. A Special Function Register (named BSR) selects the currently active general purpose
RAM bank. Only the lower middle of the BSR register (BSR<3:0>) is used. This allows access to
potentially 16 banks. Direct long addressing mode is limited to 12-bit addresses. This also allows
accesses to any of the 16 banks. BSR<7:4> will always read 0’s, and writes have no effect. All
data memory is implemented as static RAM.
A MOVLB bank instruction has been provided in the instruction set to assist in selecting banks.
If the currently selected bank is not implemented, any read will return all '0's, and all writes are
ignored and the STATUS register bits will be set/cleared as appropriate for the instruction performed.
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Section 7. Memory
Memory
7
7.7 Return Address Stack
The Return Address Stack allows any combination of up to 31 program calls and interrupts to
occur. The PC (Program Counter) is PUSHed onto the stack when a CALL or RCALL instruction
is executed or an interrupt is acknowledged. The PC value is pulled off the stack on a RETURN,
RETLW, or a RETFIE instruction. PCLATU and PCLATH are not affected by any of the return
instructions.
The stack operates as a 31 word by 21-bit RAM and a 5-bit stack pointer (STKPTR), with the
stack pointer initialized to 00000b after all resets. There is no RAM associated with stack pointer
location 00000b. This is only a reset value. During a CALL type instruction causing a PUSH onto
the stack, the stack pointer is first incremented and the RAM location pointed to by the stack
pointer is written with the contents of the PC. During a RETURN type instruction causing a POP
from the stack, the contents of the RAM location pointed to by the STKPTR register are transferred
to the PC and then the stack pointer is decremented.
The stack space is not part of either program or data space and the stack pointer is neither readable
nor writable. The address on the top of the stack is readable and writable through SFR registers.
Data can also be PUSHed to or POPed from the stack using the top-of-stack SFRs. Status
bits indicate if the stack pointer attempts to exceed the 31 levels provided. The stack does not
wrap when the stack is PUSHed greater than 31 times.
Figure 7-8: Return Address Stack and Associated Registers
7.7.1 Top-Of-Stack Access
The Top-of-Stack (TOS) is readable and writable. Three register locations, TOSU, TOSH and
TOSL, hold the contents of the stack location pointed to by the STKPTR register. This allows
users to implement a software stack if necessary. After a CALL, RCALL or interrupt, the software
can read the PUSHed value by reading the TOSU, TOSH and TOSL registers. These values can
be placed on a user defined software stack. At return time, the software can replace the TOSU,
TOSH and TOSL and do a return.
The user must disable the global interrupt enable bits during this time to prevent inadvertent
stack operations.
0x001A34
11111
11110
11101
...
...
...
00011
00010
00001
00000
00010
Return Address Stack
Top of Stack
0x000D58
TOSU TOSH TOSL
0x00 0x1A 0x34
STKPTR<4:0>
Note: The user must disable interrupts when manipulating the stack.
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7.7.2 PUSH and POP Instructions
Since the Top-of-Stack (TOS) is readable and writable, the ability to PUSH values onto the stack
and pull values off the stack without disturbing normal program execution is a desirable option.
To PUSH the current PC value onto the stack, a PUSH instruction can be executed. This will increment
the stack pointer and load the current PC value onto the stack. TOSU, TOSH, and TOSL
can then be modified to place data on the stack instead of a return address. This data may be a
new return address. This may be done in the operation of a Real Time Operating System
(RTOS).
The ability to pull the TOS value off of the stack and replace it with the value that was previously
PUSHed onto the stack, without disturbing normal execution, is achieved by using the POP
instruction. The POP instruction discards the current TOS by decrementing the stack pointer. The
previous value PUSHed onto the stack then becomes the TOS value.
Example 7-4: Using the PUSH Instruction
Example 7-5: Using the POP Instruction
MOVLW Dummy_TOSU ;
MOVWF TOSU ;
MOVLW Dummy_TOSH ;
MOVWF TOSH ;
MOVLW Dummy_TOSL ;
MOVWF TOSL ;
PUSH ;
MOVFF TOSU, PREINC1 ;
MOVFF TOSH, PREINC1 ;
MOVFF TOSL, PREINC1 ;
POP ;
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Section 7. Memory
Memory
7
7.7.3 Return Stack Pointer (STKPTR)
The STKPTR register contains the return stack pointer value and the overflow and underflow bits.
The stack overflow bit (STKFUL) and underflow bit (STKUNF) allow software verification of a
stack condition. The STKFUL and STKUNF bits are cleared only after a POR reset.
After the PC is PUSHed onto the stack 31 times (without POPing any values off the stack), the
32nd PUSH over-writes the value from the 31st PUSH and sets the STKFUL bit, while the
STKPTR remains at 11111b. The 33rd PUSH overwrites the 32nd PUSH (and so on), while
STKPTR remains 11111b.
After the stack is POPed enough times to unload the stack, the next POP will return a value of
zero to the PC and set the STKUNF bit while the STKPTR remains at 00000b. The next POP
returns zero again (and so on), while STKPTR remains 00000b.
The stack pointer can be accessed through the STKPTR register. The user may read and write
the stack pointer values. This can be used by a Real Time Operating System (RTOS) for return
stack maintenance. Figure 7-8 shows the STKPTR register. The value of the stack pointer will be
0 through 31. At reset, the stack pointer value will be 0. The stack pointer will increment when
PUSHing and will decrement when POPing.
7.7.4 Stack Full/Underflow Resets
At the user’s option, the overflow and underflow can cause a device reset to interrupt the program
code. The reset is enabled with a configuration bit, STVREN. When the STVREN bit is disabled,
a full or underflow condition will set the appropriate STKFUL or STKUNF bit but not cause a reset.
When the STVREN bit is enabled, a overflow or underflow will set the appropriate STKFUL or
STKUNF bit and then cause a device reset very similar in nature to the WDT reset. In either case,
the STKFUL or STKUNF bits are only cleared by user software or a POR reset.
7.7.5 Fast Register Stack
A "fast interrupt return" option is available for interrupts. A fast register stack is provided for the
STATUS, WREG, and BSR registers and are only one in depth. The stack is neither readable nor
writable and is loaded with the current value of the corresponding register when the processor
vectors for an interrupt. The values in the registers are then loaded back into the working registers
if the fast return instruction is used to return from the interrupt.
Low or high priority interrupt PUSHes values into the stack registers. If both low and high priority
interrupts are enabled, the stack registers cannot be used reliably for low priority interrupts. A
high priority interrupt, if one occurs while servicing a low priority interrupt, will overwrite the stack
registers stored by the low priority interrupt.
If high priority interrupts are not disabled during low priority interrupts, users must save the key
registers in software during a low priority interrupt.
If no interrupts are used, the fast register stack can be used to restore the STATUS, WREG and
BSR registers at the end of a subroutine call. To use the fast register stack for a subroutine call,
a fast call instruction must be executed.
Note: Returning a zero to the PC on an underflow has the effect of vectoring the program
to the reset vector, where the stack conditions can be verified and appropriate
actions can be taken.
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7.7.6 Indirect Addressing, INDF, and FSR Registers
Indirect addressing is a mode of addressing data memory where the data memory address in
the instruction is not fixed. An SFR register is used as a pointer to the data memory location that
is to be read or written. Since this pointer is in RAM, the contents can be modified by the program.
This can be useful for data tables in the data memory and for software stacks. Figure 7-9
shows the operation of indirect addressing. This shows the moving of the value to the data
memory address specified by the value of the FSR register.
Indirect addressing is possible by using the INDF register. Any instruction using the INDF register
actually accesses the register pointed to by the File Select Register, FSR. Reading the INDF register
itself indirectly (FSR = '0') will read 00h. Writing to the INDF register indirectly results in a
no-operation (although status bits may be affected). The FSR register contains a 12-bit address,
which is shown in Figure 7-9.
Figure 7-9: FSR Operation (Indirect Addressing)
There are three indirect addressing registers. To address the entire Data Memory space (4096
bytes), these registers are 12 bits wide. To store the 12 bits of addressing information, two 8-bit
registers are required. These indirect addressing registers are:
1. FSR0: composed of FSR0H:FSR0L
2. FSR1: composed of FSR1H:FSR1L
3. FSR2: composed of FSR2H:FSR2L
In addition, there are registers INDF0, INDF1 and INDF2, which are not physically implemented.
Reading or writing to these registers activates indirect addressing, with the value in the corresponding
FSR register being the address of the data.
If an instruction writes a value to INDF0, the value will be written to the address pointed to by
FSR0H:FSR0L. A read from INDF1 actually reads the data from the address pointed to by
FSR1H:FSR1L. INDFn can be used in code anywhere an operand can be used.
If the INDF0, INDF1 or INDF2 register is read indirectly via an FSR, all '0's are read (Zero bit is
set). Similarly, if INDF0, INDF1or INDF2 is written to indirectly, the operation will be equivalent to
a NOP, and the STATUS bits are not affected.
Opcode Address
File Address = INDF
FSR
Instruction
Executed
Instruction
Fetched
RAM
Opcode File
12 12
12
BSR<3:0>
4 8
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Section 7. Memory
Memory
7
7.7.6.1 Indirect Addressing Operation
Each FSR register has an INDF register plus four addresses associated with it. The same INDFn,
and FSRnH:FSRnL registers are used, but depending on the INDFn address selected, the
FSRnH:FSRnL registers may be modified.
When a data access is done to the one of the five INDFn locations, the address selected will configure
the FSRn register to:
• Do nothing to FSRn after an indirect access (no change) - INDFn
• Auto-decrement FSRn after an indirect access (post-decrement) - POSTDECn
• Auto-increment FSRn after an indirect access (post-increment) - POSTINCn
• Auto-increment FSRn before an indirect access (pre-increment) - PREINCn
• Use the value in the WREG register as an offset to FSRn. Do not modify the value of the
WREG or the FSRn register after an indirect access (no change) - PLUSWn
When using the auto-increment or auto-decrement features, the effect on the FSR is not reflected
in the STATUS register. For example, if the indirect address causes the FSR to equal '0', the Z
bit will not be set.
Incrementing or decrementing an FSR affects all 12 bits. That is, when FSRnL overflows from an
increment, FSRnH will be incremented automatically.
Adding these features allows the FSRn to be used as a stack pointer in addition to its uses for
table operations in data memory.
Each FSR has an address associated with it that performs an indexed indirect access. When a
data access to this INDFn location (PLUSWn) occurs, the FSRn is configured to add the signed
value in the WREG register and the value in FSR to form the address before an indirect access.
The FSR value is not changed.
If an FSR register contains a value that points to one of the INDFn, an indirect read will read 00h
(Zero bit is set), while an indirect write will be equivalent to a NOP (STATUS bits are not affected).
If an indirect addressing operation is done where the target address is an FSRnH or FSRnL register,
the write operation will dominate over the pre- or post-increment/decrement functions.
Figure 7-10 shows the interaction of the FSR register and the data memory.
Figure 7-10: FSR Operation (Indirect Addressing)
Note: Accessing the PLUSWn address causes indexed indirect access. The addressed
register is the addition of the value in the FSRn register and the SIGNED value in
the WREG register.
11 FSRn 0 Bank0
Bank1
Bank15
0h
1h
Bank
Fh
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Example 7-6 shows a simple use of indirect addressing to clear RAM (locations 20h-2Fh) in a
minimum number of instructions. A similar concept could be used to move a defined number of
bytes (block) of data to the USART transmit register (TXREG). The starting address of the block
of data to be transmitted could easily be modified by the program.
Example 7-6: Indirect Addressing
CLRF FSR1H ; Clear High byte of FSR
MOVLW 0x20 ; Load Low byte of 20h
MOVWF FSR1L ;
NEXT CLRF POSTINC1 ; Clear register and the
; increment
BTFSS FSR1L, 4 ;
GOTO NEXT ;
CONTINUE ;
:
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Section 7. Memory
Memory
7
7.8 Initialization
Example 7-7 shows how the bank switching occurs for direct addressing, while Example 7-8
shows some code to do initialization (clearing) of General Purpose RAM.
Example 7-7: Bank Switching
Example 7-8: RAM Initialization
CLRF BSR ; Clear BSR register (Bank0)
: ;
BSF BSR, 0 ; Bank1
: ;
BCF BSR, 0 ; Bank0
: ;
MOVLW 0x06 ;
MOVWF BSR ; Bank6
: ;
BCF BSR, 2 ; Bank2
: ;
BCF BSR, 1 ; Bank0
CLRF FSR1H
CLRF FSR1L
CLR_LP CLRF POSTINC1 ; Clear location, increment
MOVLW 0x0F ; Bank is FSR1H:FSR1L
SUBWF FSR1H,W ; Are we now in Bank 15?
BNZ CLR_LP ; NO, continue to clear GPRs
CONTINUE ;
:
:
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7.9 Design Tips
Question 1: I need to initialize RAM to ’0’s. What is an easy way to do that?
Answer 1:
Example 7-8 shows this. If the device you are using does not use all 15 data memory banks, the
value to compare FSR1H against will need to be modified.
Question 2: I want to convert from a PIC16C77 which has 368 bytes of RAM (across 4
banks). What is the best way to remap this memory?
Answer 2:
In devices where the Access GPR region is greater or equal to 128 bytes and Bank 1 contains
256 bytes of GPR, the RAM should be partitioned with the RAM in Bank0 at locations 0x00 to
0x7F and all of Bank1. This allows a total of 384 bytes, which is larger than the 368 bytes in the
PIC16C77. Now the BSR can be loaded with 0x01 (pointing to Bank1). All memory access are
now either in Bank1 or the Access RAM, so no bank switching is required.
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Section 7. Memory
Memory
7
7.10 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is they may be written for
the Base-Line, the Mid-Range, or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to the
Memory Organization are:
Title Application Note #
Implementing a Table Read AN556
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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7.11 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Memory Organization description.
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Table Write
Table Read/
8
HIGHLIGHTS
This section of the manual contains the following major topics:
8.1 Introduction .................................................................................................................... 8-2
8.2 Control Registers ........................................................................................................... 8-3
8.3 Program Memory ........................................................................................................... 8-6
8.4 Enabling Internal Programming ................................................................................... 8-12
8.5 External Program Memory Operation .......................................................................... 8-12
8.6 Initialization .................................................................................................................. 8-13
8.7 Design Tips .................................................................................................................. 8-14
8.8 Related Application Notes............................................................................................ 8-15
8.9 Revision History ........................................................................................................... 8-16
Section 8. Table Read/Table Write
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8.1 Introduction
Enhanced devices have two memory spaces. The program memory space and the data memory
space. The program memory space is 16 bits wide, while the data memory space is 8 bits wide.
Table Reads and Table Writes have been provided to move data between these two memory
spaces through an 8-bit register (TABLAT).
The operations that allow the processor to move data between the data and program memory
spaces are:
• Table Read (TBLRD)
• Table Write (TBLWT)
Table Read operations retrieve data from program memory and place it into the data memory
space. Figure 8-1 shows the operation of a Table Read with program and data memory.
Table Write operations store data from the data memory space into program memory. Figure 8-2
shows the operation of a Table Write with program and data memory.
Table operations work with byte entities. A table block containing data is not required to be word
aligned, so a table block can start and end at any byte address. If Enhanced MCU instructions
are being written to program memory, these instructions must be word aligned.
Figure 8-1: Table Read Operation
Figure 8-2: Table Write Operation
TABLE POINTER (1) TABLE LATCH (8-bit)
Program Memory
TBLPTRH TBLPTRL TABLAT
Program Memory Address
(TBLPTR)
TBLPTRU
Instruction: TBLRD*
Note 1: Table Pointer points to a byte in
program memory.
TABLE POINTER (1) TABLE LATCH (8-bit)
Program Memory
TBLPTRU TBLPTRH TBLPTRL TABLAT
Instruction: TBLWT*
Note 1: Table Pointer points to a byte in
program memory.
Program Memory Address
(TBLPTR)
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Section 8. Table Read/Table Write
Table Write
Table Read/
8
8.2 Control Registers
Several control registers are used in conjunction with the TBLRD and TBLWT instructions. These
include the:
• RCON register
• MEMCON register
• TBLPTR registers
• TABLAT register
8.2.1 RCON Register
The LWRT bit specifies the operation of Table Writes to internal memory when the VPP voltage
is applied to the MCLR pin. When the LWRT bit is set, the controller continues to execute user
code, but long Table Writes are allowed (for programming internal program memory) from user
mode. The LWRT bit can be cleared only by performing either a Power-On Reset (POR) or MCLR
reset. The other bits of the RCON register do not relate to Table Read nor Table Write operation.
Register 8-1: RCON Register
R/W-0 R/W-0 U-0 R/W-1 R/W-1 R/W-1 R/W-0 R/W-0
IPEN LWRT — RI TO PD POR BOR
bit 7 bit 0
bit 7 IPEN: Interrupt Priority Enable
1 = Enable priority levels on interrupts
0 = Disable priority levels on interrupts (PIC16CXXX compatibility mode)
bit 6 LWRT: Long Write Enable
1 = Enable TABLE WRITE to internal program memory
0 = Disable TABLE WRITE to internal program memory
Note 1: Only cleared on a POR or MCLR reset.
Note 2: This bit has no effect on TBLWT instructions to external program memory.
bit 5 Unimplemented: Read as '0'
bit 4 RI: Reset Instruction Flag bit
1 = No Reset instruction occurred
0 = A Reset instruction occurred
bit 3 TO: Time-out bit
1 = After power-up, CLRWDT instruction, or SLEEP instruction
0 = A WDT time-out occurred
bit 2 PD: Power-down bit
1 = After power-up or by the CLRWDT instruction
0 = By execution of the SLEEP instruction
bit 1 POR: Power-On Reset Status bit
1 = No Power-On Reset occurred
0 = A Power-On Reset occurred (must be set in software after a Power-On Reset occurs)
bit 0 BOR: Brown-out Reset Status bit
1 = No Brown-out Reset or POR reset occurred
0 = A Brown-out Reset or POR reset occurred
(must be set in software after a Brown-out Reset occurs)
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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8.2.2 MEMCON Register
This register is only available on devices with a system bus to interface to external program memory.
The MEMCON register is used to specify the operation of the 16-bit external system bus for
Table Write operations. For additional information see the “System Bus” section. This register
is not implemented in devices without a System Bus.
Register 8-2: MEMCON Register
R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0 R/W-0 R/W-0
EBDIS PGRM WAIT1 WAIT0 — — WM1 WM0
bit 7 bit 0
bit 7 EBDIS: External bus disable bit
This bit is used to disable the System Bus pins when in Extended Microcontroller mode. When
disabled, the system bus pins become general purpose I/O.
1 = External system bus disabled, all I/O pin functions are enabled
0 = External system bus enabled, and I/O pin functions are disabled
bit 6 PGRM: Program RAM enable bit
This bit is used to configure internal GPR locations into the program memory map. This is useful
for boot loaders in devices operating in microprocessor mode. The amount of GPR mapped will
be device dependant
1 = GPR memory is mapped to internal program memory space. External program memory
at these locations is unused. The internal GPR memory locations are disabled and
returns 00h.
0 = GPR memory remains in data memory space. External program memory space is available.
bit 5-4 WAIT1:WAIT0: Wait Cycle count bits
Table reads and writes bus cycle wait count
11 = Table reads and writes will wait 0 TCY
10 = Table reads and writes will wait 1 TCY
01 = Table reads and writes will wait 2 TCY
00 = Table reads and writes will wait 3 TCY
bit 3-2 Unimplemented: Read as '0'
bit 1-0 WM1:WM0: Write Mode bit
Table Write write mode operation with 16-bit bus
11 = Word Write Mode: TABLAT0 and TABLAT1 word output,
WRH active when TABLAT1 written
10 = Reserved
01 = Byte Select Mode: TABLAT data copied on both MS and LS Byte,
WRH and (UB or LB) will activate
00 = Byte Write Mode: TABLAT data copied on both MS and LS Byte,
WRH or WRL will activate
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Note: Any register that has a protected bit requires that the entire register is protected. To
write to a protected register requires the proper write sequence on the
CMLK1:CMLK0 bits before this register can be updated.
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Section 8. Table Read/Table Write
Table Write
Table Read/
8
8.2.3 TABLAT - Table Latch Register
The Table Latch (TABLAT) is an 8-bit register mapped into the SFR space. The Table Latch is
used to hold 8-bit data during data transfers between program memory and data memory.
8.2.4 TBLPTR - Table Pointer Register
The Table Pointer (TBLPTR) addresses a byte within the program memory. The TBLPTR is comprised
of three SFR registers (Table Pointer Upper byte, High byte, and Low byte). These three
registers (TBLPTRU:TBLPTRH:TBLPTRL) join to form a 22-bit wide pointer. The low order
21-bits allows the device to address up to 2M bytes (or 1M words) of program memory space.
The 22nd bit allows access to the Device ID, the User ID, and the Configuration bits.
The Table Pointer, TBLPTR, is used by the TBLRD and TBLWT instructions. These instructions
can update the TBLPTR in one of four ways, based on the table operation. These operations are
shown in Table 8-1. These operations on the TBLPTR only affect the low order 21-bits.
Table 8-1: Table Pointer Operations with TBLRD and TBLWT Instructions
Instruction Operation on Table Pointer
TBLRD*
TBLWT* TBLPTR is not modified
TBLRD*+
TBLWT*+ TBLPTR is incremented after the read/write
TBLRD*-
TBLWT*- TBLPTR is decremented after the read/write
TBLRD+*
TBLWT+* TBLPTR is incremented before the read/write
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Section 8. Table Read/Table Write
Table Write
Table Read/
8
8.3 Program Memory
The program memory can be either internal or external. External program memory requires that
the device has the system bus interface. The operation of Table Reads and Table Writes is different
depending on the location of the program memory (internal or external).
For the device to access external memory, the device needs to be operating in either extended
microcontroller mode (some program memory is also internal), or microprocessor mode (no program
memory is internal).
In this section, the discussion of Table Read and Table Write operation will be limited to the operation
with internal program memory. For operation with external program memory, please refer
to the “System Bus” section.
8.3.1 Internal Program Memory
The device selected will determine the program memory technology used. The Internal Program
Memory can currently be one of three different memory technologies:
1. EPROM
2. FLASH
3. ROM
Depending on the memory technology the following statements can be made.
For EPROM devices:
• All unprogrammed memory locations will read back 0xFF (all bits set)
• Any bit that is set can be programmed clear
• Locations with data can be reprogrammed only if 1’s are changed to 0’s
• No cleared bit can be set unless the entire device is erased, which is only possible with windowed
parts.
For FLASH devices:
• Any bit can be modified on a byte/block basis (individual bits cannot be modified)
• All writes occur with the write of an entire write block
• The size of the write block is device dependent
For ROM devices:
• All unprogrammed memory locations will read back 0xFF (all bits set)
• No program memory location can be modified
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8.3.2 Internal Program Memory Operation
Table Read operation is independent of internal Program Memory Technology used. Table Write
operation will be dependent on the memory technology of the internal Program Memory.
The notation “TBLRD instruction” means any of the four Table Read forms (TBLRD*, TBLRD*+,
TBLRD*-, TBLRD+*) and the notation “TBLWT instruction” means any of the four Table Write
forms (TBLWT*, TBLWT*+, TBLWT*-, TBLWT+*). For additional details on the operation of these
instructions refer to the “Instruction Set” section.
8.3.2.1 Table Read Overview (TBLRD)
The TBLRD instructions are used to read data from program memory to data memory.
The Table Reads from program memory are performed one byte at a time.
The TBLPTR points to a byte address in program space. Executing a TBLRD instruction moves
the contents of the addressed byte into the TABLAT register. In addition, the TBLPTR can be
modified automatically for the next Table Read operation.
The TBLPTR can be automatically modified, depending on the form of the TBLRD instruction (see
Table 8-1). All of the TBLRD instructions require two instruction cycles (TCY) to execute.
8.3.2.1.1 Effects of a Reset
The TABLAT register will retain the value read from program memory (if the instruction completed).
The Table Pointer registers will not change, and the RCON register will be forced to the
appropriate reset state.
8.3.2.2 Table Write Overview (TBLWT)
The TBLWT instructions are used to write data from data memory to program memory.
For devices with EPROM Program Memory, Table Writes are performed in pairs, one byte at a
time. Table Writes to an even program memory address (TBLPTR<0> is clear) will load an internal
memory latch from TABLAT, and is known as a short write. Table Writes to an odd program
memory address (TBLPTR<0> is set) will start long writes. (TABLAT is programmed to the program
word high byte, and the internal memory latch is programmed to the same word low byte).
For devices using another program memory technology, the operation may be different. Please
refer to the device data sheet.
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8.3.2.2.1 Memory Write Block Size
Depending on the device used, the write block size will be different. The larger the block size, the
faster the entire internal program memory space can be programmed. This is because the
EPROM/FLASH write time is much longer than the time to load the holding registers. For internal
program memory, the write block size can vary from 2 bytes to many bytes (in FLASH devices).
A write to the Most Significant byte (MSB) of the block causes the entire block to be written to
program memory. Writes to all other locations in the write block only modify the contents of the
specified holding register.
After a write cycle has completed, the contents of the Write Block Holding Registers are forced
set (‘1’s). This eases the writing of only a single byte within a program memory block. Figure 8-3
shows the write block for EPROM program memory. The write block size is 2 bytes.
If a single byte is to be programmed, the low (even) byte of the destination program word should
be read using TBLRD*, then modified if required, and written back to the same address using
TBLWT*+. Then the high (odd) byte should be read using TBLRD*, modified if required, and written
back to the same address using a TBLWT instruction. The write to an odd address will cause
a long write to begin (in EPROM program memory devices). This process ensures that existing
data in either byte will not be changed unless desired.
Figure 8-3: Holding Registers and the Write Block (EPROM Program Memory)
Block n
Block n + 1
Block n + 2
MSB
The write to the MSB of the write block causes the
entire block to be written to program memory. The
program memory block that is written depends on
the address that is written to in the MSB of the write
block.
All writes to the holding registers use only the LSb’s
of the address to specify into which holding register
to load the data.
Holding Registers
Program Memory (x 16-bits)
Write Block
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Section 8. Table Read/Table Write
Table Write
Table Read/
8
8.3.2.2.2 EPROM Program Memory Operation
The long write is what actually programs the data into the internal memory. When a TBLWT
instruction to the MSB of the write block occurs, instruction execution is halted. During this time,
programming voltage and the data stored in internal latches is applied to program memory.
The sequence of steps to program the internal program memory is:
1. MCLR/VPP pin must be at the programming voltage
2. LWRT bit must be set
3. TBLWT to the address of the MSB of the write block
If the LWRT bit is clear, a short write will occur and program memory will not be changed. If the
TBLWT is not to the MSB of the write block, then the programming phase is not initiated.
Setting the LWRT bit enables long writes when the MCLR pin is taken to VPP voltage. Once the
LWRT bit is set, it can be cleared only by performing a Power-On Reset (POR) or MCLR reset.
To ensure that the memory location has been well programmed, a minimum programming time
is required. The long write can be terminated after the programming time has expired by any
event that can wake the controller from SLEEP. This may be a reset or an interrupt that operates
during sleep. Having only one interrupt source enabled to terminate the long write ensures that
no unintended interrupts will prematurely terminate the long write. Usable interrupt sources
include:
• WDT
• A/D
• External Interrupts (INT0, INT1, or INT2)
• PORTB interrupt on change
• USART on address detect
• Timer1 in async counter mode or async external clock mode.
• Timer3 in async counter mode or async external clock mode.
• Capture
• SPI
8.3.2.2.3 Sequence of events
The sequence of events for programming an internal program memory location should be:
1. Enable the interrupt that terminates the long write. Disable all other interrupts.
2. Clear the source interrupt flag.
3. If Interrupt Service Routine (ISR) execution is desired when the device wakes, enable global
interrupts (GIE, GIEH, or GIEL).
4. Set LWRT bit in RCON register.
5. Raise MCLR/VPP pin to the programming voltage, VPP.
6. Clear the WDT (if enabled).
7. Set the interrupt source to interrupt at the required time.
8. Load the desired Table Pointer Address.
9. Execute the Table Write for the lower (even) byte. This will be a short write.
10. Execute the Table Write for the upper (odd) byte. This will be a long write. The controller
will halt instruction execution while programming. The interrupt wakes the controller.
11. If GIE was set, service the interrupt request.
12. If more locations to program, go to step 2.
13. Lower MCLR/VPP pin to VDD.
14. Verify the memory location (Table Read).
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8.3.2.2.4 Interrupts
The long write must be terminated by a RESET or any interrupt that can wake the controller from
SLEEP mode. Usable interrupt sources include:
• WDT
• A/D
• INT0
• INT1
• INT2
• RB<7:4> interrupt on change
• USART on address detect
• Timer1 in asynchronous counter mode or asynchronous external clock mode
• Timer3 in asynchronous counter mode or asynchronous external clock mode
The interrupt source must have its interrupt enable bit set. When the source sets its interrupt flag,
programming will terminate. This will occur regardless of the settings of interrupt priority bits, the
GIE/GIEH bit, or the PIE/GIEL bit.
Depending on the states of interrupt priority bits, the GIE/GIEH bit, or the PIE/GIEL bit, program
execution can either be vectored to the high or low priority Interrupt Service Routine (ISR), or
resume program execution.
In either case, the interrupt flag will not be automatically cleared when programming is terminated,
and will need to be cleared by the software.
Table 8-2: SLEEP Mode, Interrupt Enable Bits and Interrupt Results
Interrupt
Source
GIE/
GIEH
PIE/
GIEL Priority Interrupt
Enable
Interrupt
Flag Action
Any
interrupt source
that operates
during
SLEEP
XX X 0
(default)
X SLEEP mode continues even if interrupt
flag becomes set during SLEEP.
X X X 1 0 SLEEP mode continues, will wake when
Interrupt flag is set.
0
(default)
0
(default)
X 1 1 Wakes controller, terminates long write,
executes next instruction. Interrupt flag
not cleared.
0
(default)
1 1
high priority
(default)
1 1 Wakes controller, terminates long write,
executes next instruction. Interrupt flag
not cleared.
1 0
(default)
0
low
1 1 Wakes controller, terminates long write,
executes next instruction. Interrupt flag
not cleared.
0
(default)
1 0
low
1 1 Wakes controller, terminates long write,
branches to low priority interrupt vector.
Interrupt flag can be cleared by ISR.
1 0
(default)
1
high priority
(default)
1 1 Wakes controller, terminates long write,
branches to high priority interrupt vector.
Interrupt flag can be cleared by ISR.
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Section 8. Table Read/Table Write
Table Write
Table Read/
8
8.3.2.2.5 Unexpected Termination of Write Operations
If a table write operation is terminated by an unplanned event, such as loss of power, an unexpected
reset, or an interrupt that was not disabled, the memory location just programmed should
be verified and reprogrammed if needed.
For applications where a loss of power could occur, a Brown-out reset circuit is recommended to
ensure that the write operation is terminated cleanly. This reduces the possibility that a programmed
location could not be reprogrammed to the desired value.
8.3.2.2.6 Effects of a RESET
A device reset during a long write may cause the location being programmed to be incompletely
programmed. The location should be verified and reprogrammed if needed. A device reset during
a write (short) will not effect the value in the TABLAT register (if the write cycle completed). The
RCON register will be forced into the appropriate reset state.
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8.4 Enabling Internal Programming
There is a combination of actions that need to occur to enable programming of the internal program
memory. These modes are entered by applying the VIHH voltage on the MCLR/VPP pin and
either setting the LWRT bit (self-programming) or having RB6 and RB7 at a low level when VIHH
was detected (ICSP mode).
8.4.1 Programming Modes
Table 8-3 shows the device operating modes depending on the state of the MCLR pin, the LWRT
bit, and the RB7:RB6.
Table 8-3: Device Programming Mode
(Depending on MCLR voltage and LWRT bit and RB7 and RB6 pins)
8.5 External Program Memory Operation
Regardless of the system bus mode selected, Table Reads and Table Writes to external memory
execute in 2 TCY. For information regarding the modes and waveforms of the System Bus, see
the “System Bus” section. All further details of external program memory and table operations
will be described in that section.
MCLR/VPP
Voltage LWRT RB6 RB7 OPERATING MODE
VPP 0 0 0 ICSP
VPP 0 1 X Reserved
VPP 0 X 1 Reserved
VPP 1 X X Normal execution, long Table Writes enabled
VDD 1 X X Normal execution, short Table Writes only
VSS 0 (1) X X In Device Reset
Legend: X = Don’t care.
Note 1: The LWRT bit is cleared by any device reset.
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Section 8. Table Read/Table Write
Table Write
Table Read/
8
8.6 Initialization
Example 8-1 shows the initialization of the Table pointer and the FSR0 register to read the value
from Program memory to a RAM buffer (starting at address RAMBUFADDR).
Example 8-2 shows the sequence to initialize these same registers and then write a word to the
internal EPROM Program memory.
Example 8-1: Initialization to do a Table Read
Example 8-2: Initialization to do a Table Write (to internal EPROM memory)
LFSR FSR0, RAMBUFADDR ;
MOVLW UPPER (Read Table) ;
MOVWF TBLPTRU ;
MOVLW HIGH (Read Table) ;
MOVWF TBLPTRH ;
MOVLW LOW (Read Table) ;
MOVWF TBLPTRL ;
TBLRD*+ ; Read location and then increment
; the table pointer
MOVFF TABLAT, POSTINC0 ; Copy contents of table latch to the
; indirect address and then
; increment the indirect address
; pointer.
: ; Set up interrupts to terminate
: ; long write
LFSR FSR0, RAMBUFADDR ;
MOVLW UPPER (Read Table) ;
MOVWF TBLPTRU ;
MOVLW HIGH (Read Table) ;
MOVWF TBLPTRH ;
MOVLW LOW (Read Table) ;
MOVWF TBLPTRL ;
MOVFF POSTINC0, TABLAT ; Load table latch with value
; to write
TBLWT*+ ; Write to holding register
MOVFF POSTINC0, TABLAT ; Load second byte to table latch
TBLWT*+ ; Write to MSB, (odd address)
; start long write
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8.7 Design Tips
Question 1: The location I programmed does not contain the value I wrote. What is
wrong?
Answer 1:
There are several possibilities. These include, but are not limited to:
• The maximum time requirement of the long write time was not met (for internal program
memory).
• The address of the location to program was changed during the write cycle.
• A device reset occurred during the write cycle.
• If the program memory is EPROM or EOTP, then required overprogramming was not done.
• An Interrupt flag may have been set, so the long write cycle was immediately completed
(violated long write time specification).
Question 2: Occasionally the device hangs. What is this?
Answer 2:
Your program may have executed a long write, and the device may not have the interrupts/modules
set up to terminate this long write.
Question 3: When programming the program memory are there any required algorithm
algorithms to follow?
Answer 3:
The programming algorithm will be dependent on the memory technology of the device. For complete
information on device programming please refer to the device’s programming specifications.
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2000 Microchip Technology Inc. DS39508-page 8-15
Section 8. Table Read/Table Write
Table Write
Table Read/
8
8.8 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is, they may be written for
the Base-Line, the Mid-Range, or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to the
oscillator are:
Title Application Note #
No related application notes at this time.
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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8.9 Revision History
This is the initial released revision of the Enhanced MCU Table Read/Table Write description.
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System Bus
9
Section 9. System Bus
Please check the Microchip web site for Revision B of the System Bus Section.
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9.1 Revision History
Revision A
This is the initial released revision of the Enhanced MCU System Bus module description.
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Interrupts
10
Section 10. Interrupts
HIGHLIGHTS
This section of the manual contains the following major topics:
10.1 Introduction .................................................................................................................. 10-2
10.2 Control Registers ......................................................................................................... 10-6
10.3 Interrupt Handling Operation...................................................................................... 10-19
10.4 Initialization ................................................................................................................ 10-29
10.5 Design Tips ................................................................................................................ 10-30
10.6 Related Application Notes.......................................................................................... 10-31
10.7 Revision History ......................................................................................................... 10-32
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10.1 Introduction
Interrupts can come from many sources. These sources currently include:
• External interrupt from the INT, INT1, and INT2 pins
• Change on RB7:RB4 pins
• TMR0 Overflow
• TMR1 Overflow
• TMR2 Overflow
• TMR3 Overflow
• USART Interrupts
- Receive buffer full
- Transmit buffer empty
• SSP Interrupt
• SSP I2C bus collision interrupt
• A/D conversion complete
• CCP interrupt
• LVD Interrupt
• Parallel Slave Port
• CAN interrupts
- Receive buffer 1 full
- Receive buffer 2 full
- Receive invalid
- Transmit buffer 0 empty
- Transmit buffer 1 empty
- Transmit buffer 2 empty
- Bus wakeup
- Bus invalid error
As other peripheral modules are developed, they will have interrupt sources. These sources will
map into the 10 registers used in the control and status of interrupts. These registers are:
• INTCON
• INTCON1
• INTCON2
• INTCON3
• PIR1
• PIR2
• PIE1
• PIE2
• IPR1
• IPR2
The INTCON register contains the GIE/GIEH bit. This is the Global Interrupt Enable bit. When
this bit is set, all interrupts are enabled. If needed for any single device, additional INTCON, PIR,
PIE, and IPR registers will be defined.
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Section 10. Interrupts
Interrupts
10
10.1.1 Interrupt Priority
There are two interrupt vectors. One interrupt vector is for high priority interrupts and is located
at address 000008h. The other interrupt vector is for low priority interrupts and is located at
address 000018h.
When a valid interrupt occurs, program execution vectors to one of these interrupt vector
addresses and the corresponding Global Interrupt Enable bit (GIE, GIEH, or GIEL) is automatically
cleared. In the interrupt service routine, the source(s) of the interrupt can be determined by
testing the interrupt flag bits. The interrupt flag bit(s) must be cleared before re-enabling interrupts
to avoid infinite interrupt requests. Most flag bits are required to be cleared by the application
software. There are some flag bits that are automatically cleared by the hardware.
When an interrupt condition is met, that individual interrupt flag bit will be set regardless of the
status of its corresponding mask bit .
For external interrupt events, such as the RB0/INT0 pin or PORTB change interrupt, the interrupt
latency will be three or four instruction cycles. The exact latency depends when the interrupt
event occurs. The interrupt latency is the same for one or two cycle instructions.
The “return from interrupt” instruction, RETFIE, can be used to mark the end of the interrupt service
routine. When this instruction is executed, the stack is “POPed” and the GIE bit is set (to
re-enable interrupts).
Figure 10-1: Interrupt Logic High Level Block Diagram
T0IE
GIEH/GIE
GIEL/PEIE
Wake-up if in SLEEP mode
Interrupt to CPU
Vector to location
0008h
INT2F
INT2E
INT2P
INT1F
INT1E
INT1P
T0IF
T0IE
T0IP
INT0F
INT0E
RBIF
RBIE
RBIP
IPEN
T0IF
T0IP
INT1F
INT1E
INT1P
INT2F
INT2E
INT2P
RBIF
RBIE
RBIP
INT0F
INT0E
GIEL\PEIE
IPEN
IPEN
Peripheral Interrupt Enable bit Peripheral Interrupt Flag bit
Peripheral Interrupt Priority bit
High Priority Interrupt Generation
Low Priority Interrupt Generation
Peripheral Interrupt Enable bit Peripheral Interrupt Flag bit
Peripheral Interrupt Priority bit
Additional Peripheral Interrupts
Additional Peripheral Interrupts
(If in SLEEP mode)
High Priority Interrupt initialized
(disable low priority interrupts)
(High Priority Interrupt
Vector Address)
Interrupt to CPU
Vector to Location 0018h
(Low Priority Interrupt
Vector Address)
Wake-up
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Figure 10-2: High Priority Interrupt Logic Block Diagram
PSPIF
PSPIE
GIE/GIEH
PEIE/GIEL
Wake-up (If in SLEEP mode)
Interrupt to CPU
Vector to Location
00008h
PSPIP
ADIF
ADIE
ADIP
RCIF
RCIE
RCIP
TXIF
TXIE
TXIP
SSPIF
SSPIE
SSPIP
CCP1IF
CCP1IE
CCP1IP
CCP2IF
CCP2IE
CCP2IP
TMR1IF
TMR1IE
TMR1IP
TMR2IF
TMR2IE
TMR2IP
TMR3IF
TMR3IE
TMR3IP
BCLIF
BCLIE
BCLIP
LVDIF
LVDIE
LVDIP
INT2IF
INT2IE
INT2IP
INT1IF
INT1IE
INT1IP
TMR0IF
TMR0IE
TMR0IP
INT0IF
INT0IE
INT0IP
RBIF
RBIE
RBIP
IPEN
To low priority
interrupt logic
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Section 10. Interrupts
Interrupts
10
Figure 10-3: Low Priority Interrupt Logic Block Diagram
TMR0IE
TMR0IF
TMR0IP
INT1IF
INT1IE
INT1IP
INT2IF
INT2IE
INT2IP
RBIF
RBIE
RBIP
INT0IF
INT0IE
INT0IP
GIEL
Wake-up (If in SLEEP Mode)
Interrupt to CPU
Vector to Location 00018h
PSPIE
PSPIP
ADIF
ADIE
ADIP
RCIF
RCIE
RCIP
TXIF
TXIE
TXIP
SSPIF
SSPIE
SSPIP
CCP1IF
CCP1IE
CCP1IP
CCP2IF
CCP2IE
CCP2IP
TMR1IF
TMR1IE
TMR1IP
TMR2IF
TMR2IE
TMR2IP
TMR3IF
TMR3IE
TMR3IP
BCLIF
BCLIE
BCLIP
LVDIF
LVDIE
LVDIP
(Low Priority Interrupt Vector Address)
High priority interrupt initiated signal
(Disable Low Priority Interrupts)
IPEN
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10.2 Control Registers
Generally devices have a minimum of four registers associated with interrupts. The INTCON register
contains the Global Interrupt Enable bit, GIE, as well as the Peripheral Interrupt Enable bit,
PEIE, the PIE / PIR register pair that enables the peripheral interrupts and displays the interrupt
flag status, and the Interrupt Priority Register (IPR) that controls whether the interrupt source is
a high priority or low priority interrupt.
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Section 10. Interrupts
Interrupts
10
10.2.1 INTCON Register
The INTCON Registers are readable and writable registers that contain various enable, priority,
and flag bits.
Register 10-1: INTCON Register
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-x
GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF
bit 7 bit 0
bit 7 GIE/GIEH: Global Interrupt Enable bit
When IPEN = 0:
1 = Enables all un-masked interrupts
0 = Disables all interrupts
When IPEN = 1:
1 = Enables all interrupts
0 = Disables all interrupts
bit 6 PEIE/GEIL: Peripheral Interrupt Enable bit
When IPEN = 0:
1 = Enables all un-masked peripheral interrupts
0 = Disables all peripheral interrupts
When IPEN = 1:
1 = Enables all low peripheral interrupts
0 = Disables all priority peripheral interrupts
bit 5 TMR0IE: TMR0 Overflow Interrupt Enable bit
1 = Enables the TMR0 overflow interrupt
0 = Disables the TMR0 overflow interrupt
bit 4 INT0IE: INT0 External Interrupt Enable bit
1 = Enables the INT0 external interrupt
0 = Disables the INT0 external interrupt
bit 3 RBIE: RB Port Change Interrupt Enable bit
1 = Enables the RB port change interrupt
0 = Disables the RB port change interrupt
bit 2 TMR0IF: TMR0 Overflow Interrupt Flag bit
1 = TMR0 register has overflowed (must be cleared in software)
0 = TMR0 register did not overflow
bit 1 INT0IF: INT0 External Interrupt Flag bit
1 = The INT0 external interrupt occurred (must be cleared in software)
0 = The INT0 external interrupt did not occur
bit 0 RBIF: RB Port Change Interrupt Flag bit
1 = At least one of the RB7:RB4 pins changed state (must be cleared in software)
0 = None of the RB7:RB4 pins have changed state
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Note: Interrupt flag bits are set when an interrupt condition occurs, regardless of the state
of its corresponding enable bit or the global enable bit. User software should ensure
the appropriate interrupt flag bits are clear prior to enabling an interrupt. This feature
allows for software polling.
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Register 10-2: INTCON2 Register
R/W-1 R/W-1 R/W-1 R/W-1 U-0 R/W-1 U-0 R/W-1
RBPU INTEDG0 INTEDG1 INTEDG2 — TMR0IP — RBIP
bit 7 bit 0
bit 7 RBPU: PORTB Pull-up Enable bit
1 = All PORTB pull-ups are disabled
0 = PORTB pull-ups are enabled by individual port latch values
bit 6 INTEDG0:External Interrupt0 Edge Select bit
1 = Interrupt on rising edge
0 = Interrupt on falling edge
bit 5 INTEDG1: External Interrupt1 Edge Select bit
1 = Interrupt on rising edge
0 = Interrupt on falling edge
bit 4 INTEDG2: External Interrupt2 Edge Select bit
1 = Interrupt on rising edge
0 = Interrupt on falling edge
bit 3 Unimplemented: Read as '1'
bit 2 TMR0IP: TMR0 Overflow Interrupt Priority bit
1 = TMR0 Overflow Interrupt is a high priority event
0 = TMR0 Overflow Interrupt is a low priority event
bit 1 Unimplemented: Read as '1'
bit 0 RBIP: RB Port Change Interrupt Priority bit
1 = RB Port Change Interrupt is a high priority event
0 = RB Port Change Interrupt is a low priority event
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Note: Interrupt flag bits are set when an interrupt condition occurs, regardless of the state
of its corresponding enable bit or the global enable bit. User software should ensure
the appropriate interrupt flag bits are clear prior to enabling an interrupt. This feature
allows for software polling.
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Section 10. Interrupts
Interrupts
10
Register 10-3: INTCON3 Register
R/W-1 R/W-1 U-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0
INT2IP INT1IP — INT2IE INT1IE — INT2IF INT1IF
bit 7 bit 0
bit 7 INT2IP: INT2 External Interrupt Priority bit
1 = INT2 External Interrupt is a high priority event
0 = INT2 External Interrupt is a low priority event
bit 6 INT1IP: INT1 External Interrupt Priority bit
1 = INT1 External Interrupt is a high priority event
0 = INT1 External Interrupt is a low priority event
bit 5 Unimplemented: Read as '0'
bit 4 INT2IE: INT2 External Interrupt Enable bit
1 = Enables the INT2 external interrupt
0 = Disables the INT2 external interrupt
bit 3 INT1IE: INT1 External Interrupt Enable bit
1 = Enables the INT1 external interrupt
0 = Disables the INT1 external interrupt
bit 2 Unimplemented: Read as '0'
bit 1 INT2IF: INT2 External Interrupt Flag bit
1 = The INT2 external interrupt occurred
(must be cleared in software)
0 = The INT2 external interrupt did not occur
bit 0 INT1IF: INT1 External Interrupt Flag bit
1 = The INT1 external interrupt occurred
(must be cleared in software)
0 = The INT1 external interrupt did not occur
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Note: Interrupt flag bits are set when an interrupt condition occurs, regardless of the state
of its corresponding enable bit or the global enable bit. User software should ensure
the appropriate interrupt flag bits are clear prior to enabling an interrupt. This feature
allows for software polling.
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10.2.2 PIE Register(s)
Depending on the number of peripheral interrupt sources, there may be multiple Peripheral Interrupt
Enable registers (such as PIE1 and PIE2). These registers contain the individual enable bits
for the peripheral interrupts. These registers will be generically referred to as PIE.
Although the PIE register bits have a general bit location with each register, future devices may
not have consistent placement. Bit location inconsistencies will not be a problem if you use the
supplied Microchip Include files for the symbolic use of these bits. This will allow the Assembler/Compiler
to automatically take care of the placement of these bits by specifying the correct
Register number and bit name.
Register 10-4: PIE Peripheral Interrupt Enable Registers
Note: If the device has a PIE register and IPEN = 0, the PEIE bit must be set to enable
any of the peripheral interrupts.
R/W-0
(Note 1)
bit 7 bit 0
bit TMR1IE: TMR1 Overflow Interrupt Enable bit
1 = Enables the TMR1 overflow interrupt
0 = Disables the TMR1 overflow interrupt
bit TMR2IE: TMR2 to PR2 Match Interrupt Enable bit
1 = Enables the TMR2 to PR2 match interrupt
0 = Disables the TMR2 to PR2 match interrupt
bit TMR3IE: TMR3 Overflow Interrupt Enable bit
1 = Enables the TMR3 overflow interrupt
0 = Disables the TMR3 overflow interrupt
bit CCPxIE: CCPx Interrupt Enable bit
1 = Enables the CCPx interrupt
0 = Disables the CCPx interrupt
bit ECCPxIE: Enhanced CCPx Interrupt Enable bit
1 = Enables the CCPx interrupt
0 = Disables the CCPx interrupt
bit SSPIE: Synchronous Serial Port Interrupt Enable bit
1 = Enables the SSP interrupt
0 = Disables the SSP interrupt
bit MSSPIE: Master Synchronous Serial Port Interrupt Enable bit
1 = Enables the MSSP interrupt
0 = Disables the MSSP interrupt
bit RCIE: USART Receive Interrupt Enable bit
1 = Enables the USART receive interrupt
0 = Disables the USART receive interrupt
bit TXIE: USART Transmit Interrupt Enable bit
1 = Enables the USART transmit interrupt
0 = Disables the USART transmit interrupt
bit IRXIE: CAN Invalid Received message Interrupt Enable bit
1 = Enable invalid message received interrupt
0 = Disable invalid message received interrupt
bit WAKIE: CAN Bus Activity Wake-up Interrupt Enable bit
1 = Enable Bus Activity Wake-up Interrupt
0 = Disable Bus Activity Wake-up Interrupt
bit ERRIE: CAN bus Error Interrupt Enable bit
1 = Enable CAN bus Error Interrupt
0 = Disable CAN bus Error Interrupt
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Section 10. Interrupts
Interrupts
10
bit TXB2IE: CAN Transmit Buffer 2 Interrupt Enable bit
1 = Enable Transmit Buffer 2 Interrupt
0 = Disable Transmit Buffer 2 Interrupt
bit TXB1IE: CAN Transmit Buffer 1 Interrupt Enable bit
1 = Enable Transmit Buffer 1 Interrupt
0 = Disable Transmit Buffer 1 Interrupt
bit TXB0IE: CAN Transmit Buffer 0 Interrupt Enable bit
1 = Enable Transmit Buffer 0 Interrupt
0 = Disable Transmit Buffer 0 Interrupt
bit RXB1IE: CAN Receive Buffer 1 Interrupt Enable bit
1 = Enable Receive Buffer 1 Interrupt
0 = Disable Receive Buffer 1 Interrupt
bit RXB0IE: CAN Receive Buffer 0 Interrupt Enable bit
1 = Enable Receive Buffer 0 Interrupt
0 = Disable Receive Buffer 0 Interrupt
bit ADIE: A/D Converter Interrupt Enable bit
1 = Enables the A/D interrupt
0 = Disables the A/D interrupt
bit PSPIE: Parallel Slave Port Read/Write Interrupt Enable bit
1 = Enables the PSP read/write interrupt
0 = Disables the PSP read/write interrupt
bit EEIE: EE Write Complete Interrupt Enable bit
1 = Enables the EE write complete interrupt
0 = Disables the EE write complete interrupt
bit CMIE: Comparator Interrupt Enable bit
1 = Enables the Comparator interrupt
0 = Disables the Comparator interrupt
bit BCLIE: Bus Collision Interrupt Enable bit
1 = Enabled
0 = Disabled
bit LVDIE: Low-voltage Detect Interrupt Enable bit
1 = Enabled
0 = Disabled
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Note 1: The bit position of the enable bits is device dependent. Please refer to the device
data sheet for bit placement.
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10.2.3 PIR Register(s)
Depending on the number of peripheral interrupt sources, there may be multiple Peripheral Interrupt
Flag registers (PIR1, PIR2). These registers contain the individual flag bits for the peripheral
interrupts. These registers will be generically referred to as PIR.
Although the PIR bits have a general bit location within each register, future devices may not
have consistent placement. It is recommended that you use the supplied Microchip Include files
for the symbolic use of these bits. This will allow the Assembler/Compiler to automatically take
care of the placement of these bits within the specified register.
Note 1: Interrupt flag bits are set when an interrupt condition occurs, regardless of the state
of its corresponding enable bit or the global enable bit, GIE (INTCON<7>).
Note 2: User software should ensure the appropriate interrupt flag bits are cleared prior to
enabling an interrupt and after servicing that interrupt.
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Section 10. Interrupts
Interrupts
10
Register 10-5: PIR Register
R/W-0
(Note 1)
bit 7 bit 0
bit TMR1IF: TMR1 Overflow Interrupt Flag bit
1 = TMR1 register overflowed
(must be cleared in software)
0 = TMR1 register did not overflow
bit TMR2IF: TMR2 to PR2 Match Interrupt Flag bit
1 = TMR2 to PR2 match occurred
(must be cleared in software)
0 = No TMR2 to PR2 match occurred
bit TMR3IF: TMR3 Overflow Interrupt Flag bit
1 = TMR3 register overflowed
(must be cleared in software)
0 = TMR3 register did not overflow
bit CCPxIF: CCPx Interrupt Flag bit
Capture Mode
1 = A TMR1 register capture occurred
(must be cleared in software)
0 = No TMR1 register capture occurred
Compare Mode
1 = A TMR1 register compare match occurred
(must be cleared in software)
0 = No TMR1 register compare match occurred
PWM Mode
Unused in this mode
bit ECCPxIF: Enhanced CCPx Interrupt Flag bit
Capture Mode
1 = A TMR1 register capture occurred
(must be cleared in software)
0 = No TMR1 register capture occurred
Compare Mode
1 = A TMR1 register compare match occurred
(must be cleared in software)
0 = No TMR1 register compare match occurred
PWM Mode
Unused in this mode
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bit IRXIF: CAN Invalid Received message Interrupt Flag bit
1 = An invalid message has occurred on the CAN bus
0 = No invalid message on CAN bus
bit WAKIF: CAN Bus Activity Wake-up Interrupt Flag bit
1 = Activity on CAN bus has occurred
0 = No activity on CAN bus
bit ERRIF: CAN bus Error Interrupt Flag bit
1 = An error has occurred in the CAN module (multiple sources)
0 = No CAN module errors
bit TXB2IF: CAN Transmit Buffer 2 Interrupt Flag bit
1 = Transmit Buffer 2 has completed transmission of a message, and may be re-loaded
0 = Transmit Buffer 2 has not completed transmission of a message
bit TXB1IF: CAN Transmit Buffer 1 Interrupt Flag bit
1 = Transmit Buffer 1 has completed transmission of a message, and may be re-loaded
0 = Transmit Buffer 1 has not completed transmission of a message
bit TXB0IF: CAN Transmit Buffer 0 Interrupt Flag bit
1 = Transmit Buffer 0 has completed transmission of a message, and may be re-loaded
0 = Transmit Buffer 0 has not completed transmission of a message
bit RXB1IF: CAN Receive Buffer 1 Interrupt Flag bit
1 = Receive Buffer 1 has received a new message
0 = Receive Buffer 1 has not received a new message
bit RXB0IF: CAN Receive Buffer 0 Interrupt Flag bit
1 = Receive Buffer 0 has received a new message
0 = Receive Buffer 0 has not received a new message
bit SSPIF: Synchronous Serial Port Interrupt Flag bit
1 = The transmission/reception is complete
(must be cleared in software)
0 = Waiting to transmit/receive
bit MSSPIF: Master Synchronous Serial Port Interrupt Flag bit
1 = The transmission/reception is complete
(must be cleared in software)
0 = Waiting to transmit/receive
bit RCIF: USART Receive Interrupt Flag bit
1 = The USART receive buffer, RCREG, is full
(cleared when RCREG is read)
0 = The USART receive buffer is empty
bit TXIF: USART Transmit Interrupt Flag bit
1 = The USART transmit buffer, TXREG, is empty
(cleared when TXREG is written)
0 = The USART transmit buffer is full
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Section 10. Interrupts
Interrupts
10
bit ADIF: A/D Converter Interrupt Flag bit
1 = An A/D conversion completed
(must be cleared in software)
0 = The A/D conversion is not complete
bit PSPIF: Parallel Slave Port Read/Write Interrupt Flag bit
1 = A read or a write operation has taken place
(must be cleared in software)
0 = No read or write has occurred
bit EEIF: EE Write Complete Interrupt Flag bit
1 = The data EEPROM write operation is complete
(must be cleared in software)
0 = The data EEPROM write operation is not complete
bit CMIF: Comparator Interrupt Flag bit
1 = Comparator input has changed
(must be cleared in software)
0 = Comparator input has not changed
bit BCLIF: Bus Collision Interrupt Flag bit
1 = A Bus Collision occurred
(must be cleared in software)
0 = No Bus Collision occurred
bit LVDIF: Low-voltage Detect Interrupt Flag bit
1 = A Low Voltage condition occurred
(must be cleared in software)
0 = The device voltage is above the Low Voltage Detect trip point
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Note 1: The bit position of the enable bits is device dependent. Please refer to the device
data sheet for bit placement.
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10.2.4 IPR Register
Depending on the number of peripheral interrupt sources, there may be multiple Peripheral Interrupt
Priority registers (such as IPR1 and IPR2). These registers contain the individual priority bits
for the peripheral interrupts. These registers will be generically referred to as IPR. If the device
has an IPR register and IPEN = 0, the PEIE bit must be set to enable any of these peripheral
interrupts.
Although the IPR register bits have a general bit location with each register, future devices may
not have consistent placement. Bit location inconsistencies will not be a problem if you use the
supplied Microchip Include files for the symbolic use of these bits. This will allow the Assembler/Compiler
to automatically take care of the placement of these bits by specifying the correct
register and bit name.
Register 10-6:IPR Peripheral Interrupt Priority Register
Note: The IP bit specifies the priority of the peripheral interrupt.
R/W-0
(Note 1)
bit 7 bit 0
bit TMR1IP: TMR1 Overflow Interrupt Priority bit
1 = TMR1 Overflow Interrupt is a high priority event
0 = TMR1 Overflow Interrupt is a low priority event
bit TMR2IP: TMR2 to PR2 Match Interrupt Priority bit
1 = TMR2 to PR2 Match Interrupt is a high priority event
0 = TMR2 to PR2 Match Interrupt is a low priority event
bit TMR3IP: TMR3 Overflow Interrupt Priority bit
1 = TMR3 Overflow Interrupt is a high priority event
0 = TMR3 Overflow Interrupt is a low priority event
bit CCPxIP: CCPx Interrupt Priority bit
1 = CCPx Interrupt is a high priority event
0 = CCPx Interrupt is a low priority event
bit ECCPxIP: Enhanced CCPx Interrupt Priority bit
1 = Enhanced CCPx Interrupt is a high priority event
0 = Enhanced CCPx Interrupt is a low priority event
bit MSSPIP: Master Synchronous Serial Port Interrupt Priority bit
1 = Master Synchronous Serial Port Interrupt is a high priority event
0 = Master Synchronous Serial Port Interrupt is a low priority event
bit SSPIP: Synchronous Serial Port Interrupt Priority bit
1 = Synchronous Serial Port Interrupt is a high priority event
0 = Synchronous Serial Port Interrupt is a low priority event
bit RCIP: USART Receive Interrupt Priority bit
1 = USART Receive Interrupt is a high priority event
0 = USART Receive Interrupt is a low priority event
bit TXIP: USART Transmit Interrupt Priority bit
1 = USART Transmit Interrupt is a high priority event
0 = USART Transmit Interrupt is a low priority event
bit ADIP: A/D Converter Interrupt Priority bit
1 = A/D Converter Interrupt is a high priority event
0 = A/D Converter Interrupt is a low priority event
bit PSPIP: Parallel Slave Port Read/Write Interrupt Priority bit
1 = Parallel Slave Port Read/Write Interrupt is a high priority event
0 = Parallel Slave Port Read/Write Interrupt is a low priority event
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Section 10. Interrupts
Interrupts
10
bit IRXIP: CAN Invalid Received message Interrupt Priority bit
1 = CAN Invalid Received message Interrupt is a high priority event
0 = CAN Invalid Received message Interrupt is a low priority event
bit WAKIP: CAN Bus Activity Wake-up Interrupt Priority bit
1 = CAN Bus Activity Wake-up Interrupt is a high priority event
0 = CAN Bus Activity Wake-up Interrupt is a low priority event
bit ERRIP: CAN bus Error Interrupt Priority bit
1 = CAN bus Error Interrupt is a high priority event
0 = CAN bus Error Interrupt is a low priority event
bit TXB2IP: CAN Transmit Buffer 2 Interrupt Priority bit
1 = CAN Transmit Buffer 2 Interrupt is a high priority event
0 = CAN Transmit Buffer 2 Interrupt is a low priority event
bit TXB1IP: CAN Transmit Buffer 1 Interrupt Priority bit
1 = CAN Transmit Buffer 1 Interrupt is a high priority event
0 = CAN Transmit Buffer 1 Interrupt is a low priority event
bit TXB0IP: CAN Transmit Buffer 0 Interrupt Priority bit
1 = CAN Transmit Buffer 0 Interrupt is a high priority event
0 = CAN Transmit Buffer 0 Interrupt is a low priority event
bit RXB1IP: CAN Receive Buffer 1 Interrupt Priority bit
1 = CAN Receive Buffer 1 Interrupt is a high priority event
0 = CAN Receive Buffer 1 Interrupt is a low priority event
bit RXB0IP: CAN Receive Buffer 0 Interrupt Priority bit
1 = CAN Receive Buffer 0 Interrupt is a high priority event
0 = CAN Receive Buffer 0 Interrupt is a low priority event
bit EEIP: EE Write Complete Interrupt Priority bit
1 = EE Write Complete Interrupt is a high priority event
0 = EE Write Complete Interrupt is a low priority event
bit CMIP: Comparator Interrupt Priority bit
1 = Comparator Interrupt is a high priority event
0 = Comparator Interrupt is a low priority event
bit BCLIP: Bus Collision Interrupt Priority bit
1 = Bus Collision Interrupt is a high priority event
0 = Bus Collision Interrupt is a low priority event
bit LVDIP: Low-voltage Detect Interrupt Priority bit
1 = Low-voltage Detect Interrupt is a high priority event
0 = Low-voltage Detect Interrupt is a low priority event
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Note 1: The bit position of the priority bits is device dependent. Please refer to the device
data sheet for bit placement.
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10.2.5 RCON Register
The RCON register contains the bit that is used to enable prioritized interrupts (IPEN) as well as
status bits to indicate the cause of a device reset, if the device was in sleep mode and if long
writes to internal memory are enabled.
Register 10-7: RCON Register
R/W-0 R/W-0 U-0 R/W-1 R/W-1 R/W-1 R/W-0 R/W-0
IPEN LWRT — RI TO PD POR BOR
bit 7 bit 0
bit IPEN: Interrupt Priority Enable bit
1 = Enable priority levels (high and low) on interrupts
0 = Disable priority levels (all peripherals are high) on interrupts (PIC16CXXX compatibility)
(This causes the Interrupt Priority (IP) bits to be ignored)
bit 6 LWRT: Long Write Enable
For details of bit operation see description of RCON register bit in Register 3-2
bit 5 Unimplemented: Read as '0'
bit 4 RI: Reset Instruction Flag bit
For details of bit operation see description of RCON register bit in Register 3-2
bit 3 TO: Watchdog Time-out Flag bit
For details of bit operation see description of RCON register bit in Register 3-2
bit 2 PD: Power-down Detection Flag bit
For details of bit operation see description of RCON register bit in Register 3-2
bit 1 POR: Power-on Reset Status bit
For details of bit operation see description of RCON register bit in Register 3-2
bit 0 BOR: Brown-out Reset Status bit
For details of bit operation see description of RCON register bit in Register 3-2
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 10. Interrupts
Interrupts
10
10.3 Interrupt Handling Operation
The interrupts are controlled and monitored using several Special Function Registers. These
may include the following register types:
• INTCON registers
• PIR registers
• PIE registers
• IPR registers
The PIR registers contain the interrupt flag bits, the PIE registers contain the enable bits and the
IPR registers contain the priority bits. The number of PIR, PIE, and IPR registers depends on the
number of interrupt sources on the device.
10.3.1 Interrupt Priority
Each interrupt can be assigned a priority level by clearing or setting the corresponding interrupt
priority bit. The priority bits are located in the interrupt priority registers (IPR1, IPR2, IPR3,
INTCON2 and INTCON3). A ‘1’ in the priority register assigns high priority to the corresponding
interrupt. A ’0’ in the register assigns low priority to the interrupt. All interrupt priority bits are reset
to ’1’, meaning that all interrupts are assigned high priority at reset. The IPEN bit in the RCON
register enables priority levels for interrupts. If clear, all priorities are set to high.
10.3.1.1 High Priority Interrupts
A global interrupt enable bit, GIE/GIEH (INTCON<7>) enables (if set) all un-masked interrupts or
disables (if cleared) all interrupts. When bit GIE/GIEH is enabled and an interrupt’s flag bit and
enable bit are set while the priority is high, the interrupt will vector immediately. Individual interrupts
can be disabled through their corresponding enable bits in various registers. Individual
interrupt flag bits are set, regardless of the status of the GIE/GIEH bit. The GIE/GIEH bit is
cleared on reset.
When a high priority interrupt is responded to, the GIE/GIEH bit is automatically cleared to disable
any further interrupts, the return address is pushed onto the stack, and the PC is loaded with
000008h. Once in the interrupt service routine, the source of the interrupt can be determined by
polling the interrupt flag bits. The interrupt flag bit(s) must be cleared before re-enabling interrupts
to avoid recursive interrupts. Most flag bits are required to be cleared by the application
software. There are some flag bits that are automatically cleared by the hardware.
The “return from interrupt” instruction, RETFIE, exits the interrupt routine and sets the GIE/GIEH
bit, which re-enables high priority interrupts.
10.3.1.2 Low Priority Interrupts
Low priority interrupts are defined by having a “0” in an interrupt priority register IPRx. To enable
low priority interrupts, the IPEN bit must be set.
When the IPEN is set, the PEIE/GIEL bit (INTCON<6>) is no longer used to enable peripheral
interrupts. Its new function is to globally enable and disable low priority interrupts only. When the
service routine for a low priority interrupt is vectored to, the PEIE/GIEL bit is automatically cleared
in hardware to disable any further low priority interrupts.
The return address is pushed onto the stack and the PC is loaded with 000018h instead of
000008h (all low priority interrupts will vector to 000018h). Once in the interrupt service routine,
the source(s) of the low priority interrupt can be determined by polling the low priority interrupt
flag bits. The interrupt flag bit(s) must be cleared before re-enabling interrupts to avoid recursive
interrupts. Most flag bits are required to be cleared by the application software. There are some
flag bits that are automatically cleared by the hardware. The RETFIE instruction will reset the
PEIE/GIEL bit on return from low priority interrupts.
The GIE/GIEH bit’s function has not changed in that it still enables/disables all interrupts, however,
it is only cleared by hardware when servicing a high priority interrupt.
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10.3.1.3 High Priority Interrupts Interrupting a Low Priority ISR
If a high priority interrupt flag and enable bits are set while servicing a low priority interrupt, the
high priority interrupt will cause the low priority ISR to be interrupted (regardless of the state of
the PEIE/GIEL bit), because it is used to disable/enable low priority interrupts only. The
GIE/GIEH bit is cleared by hardware to disable any further high and low priority interrupts, the
return address is pushed onto the stack, and the PC is loaded with 000008h (the high priority
interrupt vector). Once in the interrupt service routine, the source of the high priority interrupt can
be determined by polling the interrupt flag bits. The interrupt flag bit(s) must be cleared in software
before re-enabling interrupts to avoid recursive interrupts.
Figure 10-4 shows a high priority interrupt interrupting a low priority ISR. Figure 10-5 shows a
high priority FSR with a low priority interrupt pending.
Figure 10-4: Low Priority ISR Interrupted By High Priority Interrupt
Figure 10-5: High Priority Interrupt With Pending Low Priority Interrupt
Note: The GIEH bit, when cleared, will disable all interrupts regardless of priority.
Q1 Q2Q3 Q4 Q1 Q2Q3 Q4 Q1 Q2Q3 Q4 Q1 Q2Q3 Q4 Q1 Q2Q3 Q4 Q1 Q2Q3 Q4 Q1 Q2Q3 Q4 Q1 Q2Q3 Q4 Q1 Q2Q3 Q4 Q1 Q2Q3 Q4
OSC1
CLKOUT
INT2 pin
INT2IF
PEIE/GIEL
Program
Counter PC PC + 2
(low priority)
INT0 pin
INT0IF
GIE/GIEH
(high priority)
PC + 2
Inst(0018h)
0018h 001Ah 001Ch 001Ch 0008h 000Ah 000Ch
Inst(PC)
Inst(PC - 2)
Inst(PC + 2)
Inst(PC)
Inst(001Ah)
Inst(0018h)
Instruction Fetched
Instruction Executed Dummy Dummy
Vector to High Priority ISR
High Priority Interrupt Occurs Here
Inst(001Ah)
Inst(001Ch) Inst(0008h)
Dummy Dummy
Inst(000Ah)
Inst(0008h) Inst(000Ah)
Inst(000Ch)
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC1
CLKOUT
INT0 pin
INT0IF
GIE/GIEH
Program
Counter PC PC + 2
(high priority)
INT2 pin
INT2IF
PEIE/GIEL
(low priority)
PC + 2
Inst(0008h)
0008h 000Ah 000Ch 000Eh PC + 2 PC + 2 0018h
Inst(PC)
Inst(PC - 2)
Inst(PC + 2)
Inst(PC)
Inst(000Ah)
Inst(0008h)
Instruction
Instruction Dummy Dummy
RETFIE
Inst(000Ah)
Inst(000Eh)
RETFIE Dummy Dummy
Fetched
Executed
Q1Q2 Q3 Q4
001Ah
Inst(PC+2)
Dummy Inst(0018h)
Vector to
Low Priority Interrupt
Vector to
High Priority Interrupt Return from
High Priority Interrupt
Inst(PC+2) Inst(0018h) Inst(001Ah)
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Section 10. Interrupts
Interrupts
10
Figure 10-6 and Figure 10-7 show the two cases where a low priority interrupt has occurred and
then a high priority interrupt occurs before the low priority ISR can begin execution. Figure 10-8
shows the first instruction of the low priority interrupt (at address 18h) beginning execution, when
the high priority interrupt causes the program counter to be forced to the high priority interrupt
vector address (08h).
Figure 10-6: Low Interrupt With High Interrupt Within 1 Cycle
Figure 10-7: Low Interrupt With High Interrupt Within 2 Cycles
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC1
CLKOUT
Program
Counter PC
INT2 pin
INT2IF
PEIE/GIEL
(low priority)
PC
PC - 2
Instruction
Instruction
Fetched
Executed
Q1 Q2 Q3Q4
INT0 pin
INT0IF
GIE/GIEH
(high priority)
PC + 2
PC
-
Dummy
-
Dummy
0008h
Dummy
000Ah
0008h
RETFIE
000Ah
000Eh
RETFIE
0018h
Dummy
001Ah
0018h
001Ch
0018h
PC + 2 PC + 2 0018h 0008h 000Ah 000Ch 000Eh 0018h 001Ah 001Ch
Begin Vector to
Low Priority Interrupt
Return from
High Priority Interrupt
Vector to
High Priority Interrupt
to Low Priority ISR
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC1
CLKOUT
Program
Counter PC
INT2 pin
INT2IF
PEIE/GIEL
(low priority)
PC
PC - 2
Instruction
Instruction
Fetched
Executed
Q1 Q2 Q3Q4
INT0 pin
INT0IF
GIE/GIEH
(high priority)
PC + 2
PC
-
Dummy
0018h
Dummy
-
Dummy
0008h
Dummy
000Ah
0008h
RETFIE
000Ah
000Eh
RETFIE
0018h
Dummy
001Ah
0018h
PC + 2 PC + 2 0018h 0018h 0008h 000Ah 000Ch 000Eh 0018h 001Ah
Vector to
Low Priority Interrupt
Vector to
High Priority Interrupt
Interrupt to Low Priority ISR
High Priority
Return from
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DS39510A-page 10-22 2000 Microchip Technology Inc.
Figure 10-8: Low Interrupt With High Interrupt Within 3 Cycles
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC1
CLKOUT
Program
Counter PC
INT2 pin
INT2IF
PEIE/GIEL
(low priority)
PC
PC - 2
Instruction
Instruction
Fetched
Executed
Q1Q2 Q3 Q4
INT0 pin
INT0IF
GIE/GIEH
(high priority)
PC + 2
PC
-
Dummy
0018h
Dummy
001Ah
0018h
-
Dummy
0008h
Dummy
RETFIE
0008h
000Ch
RETFIE
001Ah
Dummy
001Ch
001Ah
PC + 2 PC + 2 0018h 001Ah 001Ah 0008h 000Ah 000Ch 001Ah 001Ch
Vector to
High Priority Interrupt
Vector to
Low Priority Interrupt
Return from
Interrupt to Low Priority ISR
High Priority
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Section 10. Interrupts
Interrupts
10
10.3.1.4 Low Priority Interrupts Interrupting a High Priority ISR
A low priority interrupt cannot interrupt a high priority ISR. The low priority interrupt will be served
after all high priority interrupts have been served.
10.3.1.5 Simultaneous High and Low Priority Interrupts
If a high priority interrupt and a low priority interrupt are sampled at the same time, the high priority
interrupt service routine is always serviced first. The GIE/GIEH bit is cleared by the hardware
and the device vectors to location 000008h to the high priority ISR. After the interrupt is
serviced, the corresponding interrupt flag should be cleared to avoid a recursive interrupt. The
RETFIE instruction resets the GIE/GIEH bit, and if no other high priority interrupts are pending,
the low priority interrupt is serviced.
10.3.1.6 Fast Context Saving During High Priority Interrupts
A "fast interrupt service" option is available for high priority interrupts. This is done by creating
shadow registers for a few key registers (WREG, BSR and STATUS). Shadow registers are provided
for the STATUS, WREG, and BSR registers and are only 1 deep. The shadow registers are
not readable and are loaded with the current value of their corresponding register when the processor
vectors for a high priority interrupt. The values in the shadow registers are then loaded
back into the actual register if the fast return instruction (RETFIE 0x01) is used to return from
the interrupt. An example for fast context saving is shown in Example 10-1.
Example 10-1: Fast Context Saving
ORG 0x08
;
; Interrupt Service Routine (ISR) code. WREG, BSR and STATUS need
; to be saved upon entering the high priority interrupt service
routine
; RETFIE 0x01 ; WREG, BSR and STATUS will be restored
Note: Fast interrupt saving cannot be used reliably if high and low priority interrupts are
enabled. See Section 10.3.1.7.
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10.3.1.7 Context Saving During Low Priority Interrupts
Low priority interrupts may use the shadow registers. Any interrupt pushes values into the
shadow registers. If both low and high priority interrupts are enabled, the shadow registers cannot
be used reliably for low priority interrupts, as a high priority interrupt event will overwrite the
shadow registers.
Users must save the key registers in software during a low priority interrupt.
For example:
a) Store the STATUS, WREG and BSR registers on a software stack.
b) Execute the ISR code.
c) Restore the STATUS, WREG and BSR registers from the software stack.
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Section 10. Interrupts
Interrupts
10
Example 10-2 shows example service routine code for when high and low priority interrupts are
enabled.
Example 10-2: Interrupt Service Routine Template
ORG 0x08 ; high priority ISR
PUSH_REG_H MOVWF WREG_TEMP_HIGH
MOVFF BSR, BSR_TEMP_HIGH
MOVFF STATUS, STATUS_TEMP_HIGH
;
; High Priority Interrupt Service Routine (ISR) Code goes here
;
POP_REG_H MOVFF BSR_TEMP_HIGH, BSR
MOVF WREG_TEMP_HIGH, W
MOVFF STATUS_TEMP_HIGH, STATUS
RETFIE 0x00
;
PUSH_REG_L ORG 0x18 ; Low Priority ISR
MOVWF WREG_TEMP_LOW
MOVFF BSR, BSR_TEMP_LOW
MOVFF STATUS, STATUS_TEMP_LOW
;
; Low Priority Interrupt Service Routine (ISR) code goes here
;
Pop_REG_L MOVFF BSR_TEMP_LOW, BSR
MOVF WREG_TEMP_LOW
MOVFF STATUS_TEMP_LOW, STATUS
RETFIE 0x00
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10.3.1.8 Interrupt Latency
For external interrupt events, such as the RB0/INT0 pin or PORTB change interrupt, the interrupt
latency will be three or four instruction cycles. The exact latency depends when the interrupt
event occurs. The interrupt latency is the same for one or two cycle instructions.
10.3.1.8.1 Interrupt Latency For One Cycle Instructions
Figure 10-9 shows the timing when an external interrupt is asserted during a one cycle instruction.
The interrupt is sampled on Q4. The interrupt is then acknowledged on the Q2 cycle of the
following instruction cycle when instruction PC is executed. This is followed by a forced NOP
(dummy cycle) and the contents of the PC are stored on the stack during the Q3 cycle of this
machine cycle. By the Q3/Q4 boundary of instruction cycle two, the interrupt vector is placed into
the PC, and is presented on the program memory bus on the following cycle. This cycle is also
a dummy cycle executing a forced NOP (FNOP) so that the CPU can fetch the first instruction from
the interrupt service routine.
Figure 10-9: Interrupt Flow on a 1 Cycle Instruction
INST(PC)
Executed here FNOP
Executed here FNOP
Executed here
PC PC PC+2 PC+2 PC+3 000Ch
INTxIF flag
INST (PC) INST (PC+2) INST (0008h)
0008h 000Ah
INST (000Ah) INST (PC+2)
INST(PC-1)
Executed here
INST(0008h)
Executed here INST(000Ah)
Executed here
Inst Fetched
STACK
RAM
register
Inst Execute
GIE/GIEH bit
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Section 10. Interrupts
Interrupts
10
10.3.1.8.2 Interrupt Latency For Two Cycle Instructions
Figure 10-10 shows the timing when an external interrupt is asserted during a two cycle instruction.
The interrupt is sampled on Q4. The interrupt is then acknowledged on the Q1 of the following
instruction cycle when instruction PC is executed. This is followed by the second cycle of the
instruction and the contents of the PC are stored on the stack during Q3 of this machine cycle.
For all two cycle instructions, the PC may be updated with a new PC value due to execution control
instructions like GOTO and CALL. The reason for the forced NOP (dummy cycle) is to maintain
consistent interrupt latency between one and two cycle instructions. Two cycle instructions
require this cycle for the update of the PC to a new PC value, because all two cycle instructions
with the exception of MOVFF and MOVLF are execution control type instructions that update the
PC with a new value (i.e. GOTO and CALL). The MOVFF and MOVLF instructions will increment
the PC by 2 in this cycle because an operand fetch takes place in the second cycle. By Q3/Q4
the interrupt vector 000008h is placed into the PC and is presented on the program memory bus
on the following cycle. This cycle is a dummy cycle executing a forced NOP (FNOP) so that the
CPU can fetch the first instruction from the interrupt service routine.
Figure 10-10:Interrupt Flow on a 2 Cycle or 2 Word Instruction
Note: When using the MOVFF instruction with any one of the PCL, TOSU, TOSH, and
TOSL registers as destination, all interrupts have to be disabled.
INST(PC)
Executed here CYCLE 2
Executed here FNOP
Executed here
PC PC PC+2 New PC PC+3 000Ch
INTxIF flag
INST (PC) INST (New PC) INST (0008h)
0008h 000Ah
INST (PC+2) INST (000Ah)
INST(PC-2)
Executed here INST(0008h)
Executed here INST(000Ah)
Executed here
Inst Fetched
STACK
RAM
register
Inst Execute
GIE/GIEH bit
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10.3.1.9 InTerrupts During Table Write Operations (Long Writes)
The long write is necessary for programming the internal EPROM. Instruction execution is halted
while in a long write cycle. The long write will be terminated by any enabled interrupt. To ensure
that the EPROM location has been well programmed, a minimum programming time is required.
Typically, a Timer interrupt is used to time and terminate the long write. Having only one interrupt
enabled to terminate the long write ensures that no unintended interrupts will prematurely terminate
the long write.
Figure 10-11:INT0, INT1, and INT2 Pin Interrupt Timing (High Priority Shown)
Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q2Q1 Q3 Q4 Q1 Q3 Q4 Q2
OSC1
CLKOUT
INT pin
INTxIF flag
GIE/GIEH bit
(INTCON<7>)
INSTRUCTION FLOW
PC
Instruction
fetched
Instruction
executed
Interrupt Latency
PC PC+2 PC+2 0008h 000Ah
Inst (0008h) Inst (000Ah)
Dummy Cycle
Inst (PC) Inst (PC+2)
Inst (PC-2) Dummy Cycle Inst (0008h) Inst (PC)
—
1
4
5
1
2
3
Note 1: INTxIF flag is sampled here (every Q1).
Note 2: Interrupt latency = 3-4TCY where TCY = instruction cycle time.
Latency is the same whether Inst (PC) is a single cycle or a 2-cycle instruction.
Note 3: CLKOUT is available only in RC oscillator mode.
Note 4: For minimum width of INT pulse, refer to AC specs.
Note 5: INTxIF is enabled to be set anytime during the Q1 cycle.
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Section 10. Interrupts
Interrupts
10
10.4 Initialization
Example 10-3 enables high and low priority interrupts. The priority level for the peripherals is
loaded into the IRP1 register (IRP1_VALUE) and the peripherals that are enabled depend on the
value of PIE1_VALUE, which is loaded into the PIE1 register.
Example 10-3: Generic Initialization Example
MOVLW RCON_VALUE ; RCON_VALUE = 1???????b
MOVWF RCON ;
MOVLW IPR1_VALUE ; Peripherals with high priority
; have a ’1’ in their bit
; position.
; Those with a low priority have
; a ’0’ in their bit position.
MOVWF IRP1 ;
CLRF PIR1 ; Clear all flag bits
MOVLW PIE1_VALUE ; Enable desired peripheral
; interrupts by setting their
; bit position.
; Disable others by clearing their
; bit position.
MOVWF PIE1 ;
CLRF INTCON3 ;
CLRF INTCON2 ;
MOVLW OxC0 ; Enable high and low global
; interrupts.
MOVWF INTCON ;
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10.5 Design Tips
Question 1: My code does not seem to execute properly.
Answer 1:
There are many possible reasons. A couple of possibilities related to Interrupts are:
• Interrupts are not enabled, so the code cannot execute your expected ISR.
• The Interrupt may not be set to the priority level where your ISR code is located.
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Section 10. Interrupts
Interrupts
10
10.6 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is they may be written for
the Base-Line, the Mid-Range, or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to the
interrupts are:
Title Application Note #
No related application notes at this time.
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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10.7 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Interrupt description.
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I/O Ports
11
Section 11. I/O Ports
HIGHLIGHTS
This section of the manual contains the following major topics:
11.1 Introduction .................................................................................................................. 11-2
11.2 PORTA, TRISA, and the LATA Register ....................................................................... 11-8
11.3 PORTB, TRISB, and the LATB Register..................................................................... 11-12
11.4 PORTC, TRISC, and the LATC Register .................................................................... 11-16
11.5 PORTD, LATD, and the TRISD Register .................................................................... 11-19
11.6 PORTE, TRISE, and the LATE Register .................................................................... 11-21
11.7 PORTF, LATF, and the TRISF Register ...................................................................... 11-23
11.8 PORTG, LATG, and the TRISG Register ................................................................... 11-25
11.9 PORTH, LATH, and the TRISH Register.................................................................... 11-27
11.10 PORTJ, LATJ, and the TRISJ Register ...................................................................... 11-29
11.11 PORTK, LATK, and the TRISK Register .................................................................... 11-31
11.12 PORTL, LATL, and the TRISL Register...................................................................... 11-33
11.14 I/O Programming Considerations ............................................................................... 11-37
11.15 Initialization ................................................................................................................ 11-40
11.16 Design Tips ................................................................................................................ 11-41
11.17 Related Application Notes.......................................................................................... 11-43
11.18 Revision History ......................................................................................................... 11-44
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11.1 Introduction
General purpose I/O pins can be considered the simplest of peripherals. They allow the PICmicro
to monitor and control other devices. To add flexibility and functionality to a device, some pins
are multiplexed with an alternate function(s). These functions depend on which peripheral features
are on the device. In general, when a peripheral is functioning, that pin may not be used as
a general purpose I/O pin.
For most ports, the I/O pin’s direction (input or output) is controlled by the data direction register,
called the TRIS register. TRIS controls the direction of PORT. A ’1’ in the TRIS bit corresponds
to that pin being an input, while a ’0’ corresponds to that pin being an output. An easy
way to remember is that a ’1’ looks like an I (input) and a ’0’ looks like an O (output).
The PORT register is the latch for the data to be output. When the PORT is read, the device reads
the levels present on the I/O pins (not the latch). This means that care should be taken with
read-modify-write commands on the ports and changing the direction of a pin from an input to an
output.
Figure 11-1 shows a typical I/O port. This does not take into account peripheral functions that
may be multiplexed onto the I/O pin. Reading the PORT register reads the status of the pins
whereas writing to it will write to the port latch. All write operations (such as BSF and BCF instructions)
are read-modify-write operations. Therefore, a write to a port implies that the port pins are
read, this value is modified, and then written to the port data latch.
Figure 11-1: Typical I/O Port
Data Bus
WR PORT
WR TRIS
RD PORT
Data Latch
TRIS Latch
P
VSS
I/O pin
D Q
CK Q
D Q
CK Q
Q D
EN
N
VDD
RD TRIS
Schmitt
Trigger
TTL or
RD LAT
Note : I/O pins have protection diodes to VDD and VSS.
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Section 11. I/O Ports
I/O Ports
11
When peripheral functions are multiplexed onto general I/O pins, the functionality of the I/O pins
may change to accommodate the requirements of the peripheral module. An example of this is
the Analog to Digital converter module which forces the I/O pin to the peripheral function when
the device is reset. This prevents the device from consuming excess current if any analog levels
were on the A/D pins after a reset occurred.
With some peripherals, the TRIS bit is overridden while the peripheral is enabled. Therefore,
read-modify-write instructions (BSF, BCF, XORWF) with TRIS as destination should be avoided.
The user should refer to the corresponding peripheral section for the correct TRIS bit settings.
PORT pins may be multiplexed with analog inputs and analog VREF inputs. The operation of each
of these pins is selected, to be an analog input or digital I/O, by clearing/setting the control bits
in other Special Function registers (SFRs). An example of this is the ADCON1 register for the
10-bit A/D module. Currently, when devices have pins selected as an analog input, these pins
will read as '0's.
The TRIS registers control the direction of the port pins, even when they are being used as analog
inputs. The user must ensure the TRIS bits are maintained set when using the pins as analog
inputs.
Note 1: If pins are multiplexed with analog inputs, then on a Power-on Reset these pins are
configured as analog inputs, as controlled by the ADCON1 register. Reading port
pins configured as analog inputs read a '0'.
Note 2: If pins are multiplexed with comparator inputs, then on a Power-on Reset these pins
are configured as analog inputs, as controlled by the CMCON register. Reading port
pins configured as analog inputs read a '0'.
Note 3: Pins may be multiplexed with the Parallel Slave Port (PSP). For the PSP to function,
the I/O pins must be configured as digital inputs and the PSPMODE bit must be set.
Note 4: At present, the Parallel Slave Port (PSP) is only multiplexed onto PORTD and
PORTE. The PSP port becomes enabled when the PSPMODE bit is set. In this
mode, the user must make sure that the TRISE bits are set (pins are configured as
digital inputs) and that PORTE is configured for digital I/O. PORTD will override the
values in the TRISD register. In this mode, the PORTD and PORTE input buffers
are TTL. The control bits for the PSP operation are located in TRISE.
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11.1.1 Multiplexed Peripherals
Pins may be configured as either digital inputs or digital outputs. Digital inputs are either TTL buffers
or Schmitt Triggers. Outputs are CMOS drivers except for pin RA4, which is an open-drain
output.
All pins also support one or more peripheral modules. When configured to operate with a peripheral,
a pin may not be used for general input or output. In many cases, a pin must still be configured
for input or output, although some peripherals override the TRIS configuration.
Peripherals supported include:
• Analog to Digital Converter Modules (A/D)
• Timer Modules
- Timer0
- Timer1
- Timer2
- Timer3
• Capture/Compare/Pulse Width Modulation (CCP) modules
• External Interrupts
• Interrupt On Change pins
• Parallel Slave Port (PSP) module
• In Circuit Serial Programming
• System Oscillator
• Weak Pull-Up sources
• Synchronous Serial Port (SSP) module
- Serial Peripheral Interface (SPI)
- I2C
• Master Synchronous Serial Port (MSSP) module
- Serial Peripheral Interface (SPI)
- I2C with full hardware Master mode support
• Addressable USART module
• Controller Area Network (CAN) module
• Comparator modules
• Voltage Reference modules
• Low Voltage Detect (LVD) module
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Section 11. I/O Ports
I/O Ports
11
11.1.2 Output Data Latches (LATx) and Data Direction Register (TRISx)
All port pins have an output data latch. Writing to a port writes to that latch (LATx). The data latch
may also be read from and written to directly. If the pin is not being used by a peripheral, and is
configured as an output by its TRIS bit, data in the latch will be output to the pin.
All port pins have corresponding Data Direction Register bits (TRISx register) which configure
each pin as an input or output. Clearing a bit in a TRIS register (bit=0) configures the corresponding
pin for output, and drives the contents of the output data latch (LATx) to the selected pin. Setting
a TRIS register bit (bit=1) configures the corresponding pin as an input, and puts the
corresponding output driver in a high impedance state. After a reset, all pins are configured as
inputs.
Example 11-1 shows that writing the value in the WREG register to PORTB actually writes the
value to the LATB register.
Example 11-1: Writing to PORTB actually writes to LATB
There are two input paths from a port. One path simply reads back what is in the data latch (LATx)
without regard to whether or not the bits are being output, and may return values not present at
the pin. The other path reads back the state of the pin (PORTx) unless a peripheral forces it to
read back a fixed state.
Example 11-2 demonstrates the difference between reading a PORT and reading the output
latch of the PORT.
Example 11-2: Reading PORTB compared to reading LATB
Reading the PORTx register reads the status of the pins whereas writing to it will write to the port
data latch (LATx). A write to LATx can also be performed.
Example 11-3 shows the result of simply reading the PORT register. In this example, RB0 is
being overdrive low and RB1 is being overdriven high. This is NOT recommended, and may actually
violate device specifications, but is shown to give insight to the operation of an instruction
which reads the I/O port with respect to the I/O ports data latch.
Example 11-3: Reading PORTB reads the state of RB7:RB0
; LATB = 1100 0011
; RB<7:0> = 1001 0011
; TRISB = 1111 0000 1=input 0=output
; W_REG = 0010 1110
movwf PORTB ; writes W_REG to PORTB output data
; latch (LATB)
; LATB = 0010 1110
; RB<7:0> = 1001 1110 high nibble
; no change (TRISB)
; RB<7:0> = 1001 0101
; LATB = 0111 0101
; TRISB = 1111 0000 1=input 0=output
movf PORTB,W ; reads states of PORTB pins
; W_REG = 1001 0101
movf LATB,W ; reads contents of LATB data latch
; W_REG = 0111 0101
; RB<7:0> = 1001 0110
; LATB = 1100 0011
; TRISB = 1111 0000 1=input 0=output
movf PORTB,W ; reads state of pins
; W_REG = 1001 0110
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Example 11-4 shows what effects can occur when writing to the PORT registers.
Example 11-4: Writing to PORTB
Example 11-5 shows what effects can occur when writing to the LAT registers.
Example 11-5: Writing to LATB
Any instruction that performs a write operates internally as a read-modify-write operation. Caution
must be used when these instructions are applied to a port where pins are switching between
input and output states.
For example, a BSF PORTB, 5 instruction will cause all eight bits of PORTB to be read into the
CPU. Then the instruction sets bit 5 and the resulting data is written to LATB.
If the RB7 pin is used for bi-directional I/O and is defined as an input when BSF PORTB, 5 executes,
the input signal present on the pin itself would be read into the CPU and be written to
LATB<7>, overwriting the previous contents. As long as the RB7 pin stays in the input mode, no
problem occurs. However, if the RB7 pin is switched to an output, the contents of the data latch
may be in an unintended state, causing the RB7 pin to be in the wrong state.
Example 11-6 shows how read-modify-write operations can affect the PORT register or the TRIS
register.
Example 11-6: Read-modify-write of PORTB, and TRISB change toggles RB7
A better solution would be to use the data latch instead. A BSF LATB, 5 instruction will read the
bits in the output latch, set bit 5, and write the results back to the output latch. LATB<7> will never
be at risk of being changed.
; TRISB = 1111 0000 1=input 0=output
; W_REG = 1011 0110
; LATB = 1100 0011
; RB<7:0> = 1001 0011
movwf PORTB ; writes W_REG to LATB
; LATB = 1011 0110
; RB<7:0> = 1001 0110 low nibble only
; is output
; TRISB = 1111 0000 1=input 0=output
; W_REG = 1011 0110
; LATB = 1100 0011
; RB<7:0> = 1001 0011
movwf LATB ; writes W_REG to LATB
; LATB = 1011 0110
; RB<7:0> = 1001 0110 same result as
; ‘movwf PORTB’
; RB<7:0> = 0001 0110
; LATB = 1001 0110
; TRISB = 1100 0000
bsf PORTB,5 ; read-modify-write operation.
; LATB = 0011 0110 bit 7 cleared
; RB<7:0> = 1011 0110 RB7 changes to high speed
bcf TRISB,7 ; changes RB7 from input to output
; TRISB = 0100 0000
; RB<7:0> = 0011 0110 RB7 in now driven low
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Section 11. I/O Ports
I/O Ports
11
Example 11-7 shows that doing read-modify-writes on the LATx register and TRISx register may
not cause the voltage level on the pin to change.
Example 11-7: Read-modify-write of LATB, and TRISB change has no effect on RB7
; RB<7:0> = 1001 0110
; LATB = 1001 0110 bit 7 is high
; TRISB = 1100 0000
bsf LATB,5 ; read-modify-write operation
; LATB = 1011 0110 bit 7 has not changed
; RB<7:0> = 1011 0110
bcf TRISB,7 ; changes RB7 from input to output
; TRISB = 0100 0000
; RB<7:0> = 1011 0110 RB7 remains high
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11.2 PORTA, TRISA, and the LATA Register
PORTA is a 6-bit, or 7-bit latch depending upon the oscillator configuration selected by the FOSC
configuration bits. The corresponding data direction register is TRISA, the data output latch is
LATA, and the pins are PORTA. Except for RA4, all PORTA pins have TTL input buffers and full
CMOS output drivers. All pins are configured as inputs on a reset.
The RA4 pin is a Schmitt Trigger input and an open drain output. All other RA port pins have TTL
input levels and full CMOS output drivers. All pins have data direction bits (TRIS registers) which
can configure these pins as output or input.
Setting a TRISA register bit puts the corresponding output driver in a hi-impedance mode. Clearing
a bit in the TRISA register puts the contents of the output latch on the selected pin(s).
Example 11-8: Initializing PORTA
11.2.1 PORTA multi-plexed with Analog inputs
PORTA may be multiplexed with the AD module. When used as analog inputs, the TRISA must
configure the corresponding pins as digital inputs (‘1’ on TRIS bit). On all resets, the PORTA pins
are configured as analog inputs and a read of the digital inputs will result in read values of ‘0’.
CLRF PORTA ; Initialize PORTA by clearing output
; data latches
; CLRF LATA ; Alternate method to initialize PORTA
MOVLW 0xCF ; Value used to initialize data direction
MOVWF TRISA ; PORTA<3:0> = inputs PORTA<5:4> = outputs
; TRISA<7:6> always read as '0'
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Section 11. I/O Ports
I/O Ports
11
Figure 11-2: Block Diagram of RA3:RA0 and RA5 Pins
Data Bus
WR PORTA
WR TRISA
RD PORTA
Data Latch
TRIS Latch
P
VSS
I/O pin
To Peripheral Module(s)
D Q
CK Q
QD
CK Q
Q D
EN
N
Analog
input
mode
TTL
VDD
RD TRISA
Input
Buffer
RD LATA
or LATA
Note: I/O pins have protection diodes to VDD and VSS.
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11.2.2 RA4 / Timer0 Clock Input
The RA4/T0CKI pin is a Schmitt Trigger input and an open drain output. Pin RA4 may be multiplexed
with the peripheral module. All other PORTA pins have TTL input levels and CMOS output
drivers.
Figure 11-3: Block Diagram of RA4 Pin
Data Bus
WR PORT
WR TRISA
RD PORTA
Data Latch
TRIS Latch
Schmitt
Trigger
Input
Buffer
N
VSS
To Peripheral Module
D Q
CK Q
D Q
CK Q
Q D
EN
RD TRISA
RA4 pin
RD LATA
or LATA
Note: I/O pins have protection diodes to VSS only.
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Section 11. I/O Ports
I/O Ports
11
Table 11-1: PORTA Functions
Table 11-2: Summary of Registers Associated with PORTA
Name Bit# Buffer Function
RA0 bit0 TTL Input/output port pin
RA1 bit1 TTL Input/output port pin
RA2 bit2 TTL Input/output port pin
RA3 bit3 TTL Input/output port pin
RA4/T0CKI bit4 ST Input/output port pin or external clock input for Timer0
Output is open drain type
RA5 bit5 TTL Input/output port pin
RA6 bit6 TTL Input/output port pin
Legend: TTL = TTL input, ST = Schmitt Trigger input.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TRISA — PORTA Data Direction Control Register -111 1111 -111 1111
PORTA — Read PORTA pin/Write PORTA Data Latch -00x 0000 -00u 0000
LATA — Read PORTA Data Latch/Write PORTA Data Latch -xxx xxxx -uuu uuuu
ADCON1 ADFM ADCS2 — — PCFG3 PCFG2 PCFG1 PCFG0 00-- 0000 00-- 0000
Legend: x = unknown, u = unchanged, - = unimplemented locations read as '0'.
Shaded cells are not used by PORTA. ST = Schmitt Trigger input, TTL = TTL input.
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11.3 PORTB, TRISB, and the LATB Register
PORTB is an 8-bit wide bidirectional port. The corresponding data direction register is TRISB,
the data output latch is LATB, and the pins are PORTB. All pins have TTL inputs.
Setting a bit in the TRISB register puts the corresponding output driver in a hi-impedance input
mode. Clearing a bit in the TRISB register puts the contents of the output latch on the selected
pin. All pins are configured as inputs on a reset.
Four of the PORTB pins have a weak internal pull-up. Clearing the RBPU bit (INTCON2<7>)
turns on pull-ups on all pins. The weak pull-up is automatically turned off when the port pin is
configured as an output. The pull-ups are disabled on a reset.
Example 11-9: Initializing PORTB
11.3.1 RB2:RB0 / External Interrupts INT2:INT0
RB2:RB0 pins can also function as external interrupt sources INT2:INT0 while working as digital
inputs. These interrupts are edge triggered on the edges selected by the bits. If enabled prior to
entering sleep mode, these interrupts can wake the controller.
INT2:INT0 inputs have Schmitt trigger inputs, while the RB2:RB0 inputs have TTL buffer inputs.
Figure 11-4: Block Diagram of RB3:RB0 Pins
CLRF PORTS ; Initialize PORTS by clearing output
; data latches
; CLRF LATB ; Alternate method to initialize data latches
MOVLW 0xCF ; Value used to initialize data direction
MOVWF TRISB ; PORTB<3:0> = inputs, PORTB<5:4> = outputs
; PORTB<7:6> = inputs
Data Latch
RBPU (2)
P
VDD
D Q
CK
D Q
CK
Q D
EN
Data Bus
WR PORTB
WR TRISB
RD TRISB
RD PORTB
weak
pull-up
RD PORTB
To Peripheral Module
TTL
Input
Buffer
Schmitt Trigger
Buffer
TRIS Latch
Note 1: I/O pins have diode protection to VDD and VSS.
Note : To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit.
RD LATA
I/O pin (1)
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Section 11. I/O Ports
I/O Ports
11
Four of PORTB’s pins, RB7:RB4, have an interrupt on change feature. Only pins configured as
inputs can cause this interrupt to occur (i.e., any RB7:RB4 pin configured as an output is
excluded from the interrupt on change comparison). The input pins (of RB7:RB4) are compared
with the old value latched on the last read of PORTB. The present inputs of RB7:RB4 and their
previous values are XOR’ed together to detect a “mismatch” condition and set the RB Port
change interrupt flag bit RBIF. When enabled, this flag will generate an interrupt that can wake
the device from SLEEP.
This interrupt can wake the device from SLEEP. The user, in the interrupt service routine, can
clear the interrupt in the following manner:
a) Any read or write of PORTB will end the mismatch condition, except a write using the
MOVFF instruction.
b) Clear flag bit RBIF.
The MOVFF instruction will not end the mismatch condition if PORTB is used only as the destination
register. The contents of the destination register are not automatically read by this instruction
in the second cycle. All other reads, writes, and bit operations will read the port during execution.
A mismatch condition will continue to set flag bit RBIF. Reading PORTB will end the mismatch
condition, and allow flag bit RBIF to be cleared.
This interrupt on change (i.e., mismatch) feature, together with software configurable pull-ups on
these four pins allow easy interface to a keypad and make it possible for wake-up on key-depression.
The interrupt on change feature is recommended for wake-up on key depression and operations
where PORTB is only used for the interrupt on change feature. Polling of PORTB is not recommended
while using the interrupt on change feature.
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DS39511A-page 11-14 2000 Microchip Technology Inc.
Figure 11-5: Block Diagram of RB7:RB4 Pins
11.3.2 RB7:RB6 - In Circuit Serial Programming
If ICSP is implemented in the target application, some means of isolating RB7:RB6 from the rest
of the circuit should be provided. The ISCP inputs have Schmitt Triggers while the RB7:RB6
inputs have TTL inputs.
Note 1: I/O pins have diode protection to VDD and VSS.
Note 2: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit.
Data Latch
From other
RBPU (2)
P
D Q
CK
D Q
CK
Q D
EN
Q D
EN
Data Bus
WR PORTB
WR TRISB
Set RBIF
TRIS Latch
RD TRISB
RD PORTB
RB7:RB4 pins
weak
pull-up
RD PORTB
Latch
TTL
Input
Buffer
ST
Buffer
RB7:RB6 for In-Circuit Serial Programming mode
Q3
Q1
RD LATB
or LATB
VDD
I/O pin (1)
RD LATB
39500 18C Reference Manual.book Page 14 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-15
Section 11. I/O Ports
I/O Ports
11
Table 11-3: PORTB Functions
Table 11-4: Summary of Registers Associated with PORTB
Name Bit# Buffer Function
RB0/INT0 bit0 TTL/ST (1) Input/output port pin or external interrupt0 input. Internal software
programmable weak pull-up.
RB1/INT1 bit1 TTL/ST (1) Input/output port pin or external interrupt1 input. Internal software programmable
weak pull-up.
RB2/INT2 bit2 TTL/ST (1) Input/output port pin or external interrupt2 input. Internal software programmable
weak pull-up.
RB3/CCP2 (3) bit3 TTL/ST (4) Input/output port pin or Capture2 input/Compare2 output/PWM2 output if
CCP2MX is enabled in the configuration register. Internal software programmable
weak pull-up.
RB4 bit4 TTL Input/output port pin (with interrupt on change). Internal software programmable
weak pull-up.
RB5 bit5 TTL Input/output port pin (with interrupt on change). Internal software programmable
weak pull-up.
RB6 bit6 TTL/ST (2) Input/output port pin (with interrupt on change). Internal software programmable
weak pull-up. Serial programming (CLOCK).
RB7 bit7 TTL/ST (2) Input/output port pin (with interrupt on change). Internal software programmable
weak pull-up. Serial programming (DATA).
Legend: TTL = TTL input, ST = Schmitt Trigger input.
Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.
Note 2: This buffer is a Schmitt Trigger input when used in serial programming mode.
Note 3: The CCP2 input is only multiplexed on the RB3 pin if the CCP2MX configuration bit is ’0’.
Note 4: The CCP2 input is a Schmitt Trigger if the CCP2MX configuration bit is ’0’.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TRISB PORTB Data Direction Register 1111 1111 1111 1111
PORTB Read PORTB pins/Write PORTB Data Latch xxxx xxxx uuuu uuuu
LATB Read PORTB Data Latch/Write PORTB Data Latch xxxx xxxx uuuu uuuu
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
INTCON2 RBPU INTEDG0 INTEDG1 INTEDG2 — TMR0IP — RBIP 1111 -1-1 1111 -1-1
INTCON3 INT2IP INT1IP — INT2IE INT1IE — INT2IF INT1IF 11-0 0-00 11-0 0-00
Legend: x = unknown, u = unchanged, - = unimplemented locations read as '0'.
Shaded cells are not used by PORTB.
39500 18C Reference Manual.book Page 15 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39511A-page 11-16 2000 Microchip Technology Inc.
11.4 PORTC, TRISC, and the LATC Register
PORTC is an 8-bit bi-directional port. Each pin is individually configurable as an input or output
through the TRISC register. The data output latch is LATC. PORTC pins have Schmitt Trigger
input buffers.
When enabling peripheral functions, care should be taken in defining TRIS bits for each PORTC
pin. Some peripherals override the TRIS bit to make a pin an output, while other peripherals override
the TRIS bit to make a pin an input, and other peripherals may not override the TRIS bits
(requires that TRIS bits are configured for proper peripheral operation). The user should refer to
the corresponding peripheral section for the correct TRIS bit settings.
Example 11-10: Initializing PORTC
Figure 11-6: PORTC Block Diagram (Peripheral Output Override)
CLRF PORTC ; Initialize PORTC
; by clearing output data latches
; CLRF LATC ; Alternate method
; to clear output latch
MOVLW 0xCF ; Value used to initialize data direction
MOVWF TRISC ; PORTC<3:0> = inputs,
; PORTC<5:4> = outputs,
; PORTC<7:6> = inputs
Data Latch
TRIS Latch
RD TRISC
P
VSS
QD
CK Q
D Q
CK Q
Q D
EN
N
VDD
0
1
WR PORTC
WR TRISC
Schmitt
Trigger
Peripheral Input
Peripheral OE (2)
Data Bus
PORT/PERIPHERAL Select (1)
Peripheral Data-out
RD PORTC
Note 1: Port/Peripheral select signal selects between port data and peripheral output.
Peripheral OE (output enable) is only activated if peripheral select is active.
I/O pins have diode protection to VDD and VSS.
I/O pin (3)
RD LATC
39500 18C Reference Manual.book Page 16 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-17
Section 11. I/O Ports
I/O Ports
11
All PORTC pins have Schmitt Trigger input buffers. When a peripheral uses a pin for output, the
peripheral will override the TRIS and force the pin to be an output. Conversely, when a peripheral
uses a pin for input, the peripheral will override the TRIS and force the pin to be an input. The
TRIS is ignored while the peripheral controls the pin.
A read from the TRISC register bits will always yield the value contained in the TRISC latch
whether or not a peripheral TRIS override is being asserted. This will allow a user to read the
status of the TRISC bits at all times.
Since the TRIS bit override is in effect when the peripheral is enabled, read-modify-write instructions
(BSF, BCF and others) with TRIS as destination should be used with care.
These instructions will have no effect on the current state of the pin. However, prior to disabling
the peripheral and returning the pin to general use, the user should ensure that the TRIS bit is
correctly set for that pin.
When a peripheral uses a pin for output, the peripheral will override the TRIS and force the pin
to be an output. Conversely, when a peripheral uses a pin for input, the peripheral will override
the TRIS and force the pin to be an input. The TRIS is ignored while the peripheral controls the
pin.
A read from the TRISC register bits will always yield the value contained in the TRISC latch
whether or not a peripheral TRIS override is being asserted. This will allow a user to read the
status of the TRISC bits at all times.
Since the TRIS bit override is in effect when the peripheral is enabled, read-modify-write instructions
(BSF, BCF, and others) with TRIS as destination should be used with care.
These instructions will have no effect on the current state of the pin. However, prior to disabling
the peripheral and returning the pin to general use, the user should ensure that the TRIS bit is
correctly set for that pin.
Figure 11-7: PORTC Block Diagram (Peripheral Output Override)
Data Bus
WR LATC or
WR TRISC
RD TRISC
D Q
CK Q
Q D
CK
Peripheral Data Out
1
0
D Q
CK Q
RD PORTC
Peripheral Data In
WR PORTC RD LATC
Q
Peripheral Out
Select
Peripheral In
Select
RC7: RC0
ST Buffer
WR LATC
or PORTC
39500 18C Reference Manual.book Page 17 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39511A-page 11-18 2000 Microchip Technology Inc.
11.4.1 RC1 / CCP2 Input / Output
The RC1 pin can be multiplexed with the CCP2 module input/output. To achieve this, the
CCP2MX Configuration bit must be programmed to a ‘1’.
Table 11-5: PORTC Functions
Table 11-6: Summary of Registers Associated with PORTC
Name Bit# Buffer Type Function
RC0 bit0 ST Input/output port pin or Timer1 oscillator output or Timer1/Timer3 clock
input
RC1 bit1 ST Input/output port pin or Timer1 oscillator input
RC2 bit2 ST Input/output port pin or Capture1 input/Compare1 output/PWM1
output
RC3 bit3 ST Input/output port pin
RC4 bit4 ST Input/output port pin
RC5 bit5 ST Input/output port pin
RC6 bit6 ST Input/output port pin
RC7 bit7 ST Input/output port pin
Legend: ST = Schmitt Trigger input.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TRISC PORTC Data Direction Control Register 1111 1111 1111 1111
PORTC Read PORTC pin/Write PORTC Data Latch (LATC) xxxx xxxx uuuu uuuu
LATC LATC Data Output Register xxxx xxxx uuuu uuuu
Legend: x = unknown, u = unchanged.
39500 18C Reference Manual.book Page 18 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-19
Section 11. I/O Ports
I/O Ports
11
11.5 PORTD, LATD, and the TRISD Register
PORTD is an 8-bit port with Schmitt Trigger input buffers. Each pin is individually configured as
an input or output.
All PORTD pins have latch bits (LATD register). The LATD register, when read, will yield the contents
of the PORTD latch, and when written, will modify the contents of the PORTD latch. This
modifies the value driven out on a pin if the corresponding TRISD bit is configured for output. This
can be used in read-modify-write instructions that allow the user to modify the contents of the
latch register regardless of the status of the corresponding pins.
Example 11-11: Initializing PORTD
Figure 11-8: Typical PORTD Block Diagram (in I/O Port Mode)
CLRF PORTD ; Initialize PORTD
; by clearing output data latches
; CLRF LATD ; Alternate method to initialize
; data output latch
MOVLW 0xCF ; Value used to initialize data direction
MOVWF TRISD ; PORTD<3:0> = inputs,
; PORTD<5:4> = outputs,
; PORTD<7:6> = inputs
Data Bus
WR LATD
WR TRISD
RD PORTD
Data Latch
TRIS Latch
Schmitt
Trigger
Input
Buffer
D Q
CK
D Q
CK
Q D
EN
I/O pin (1)
RD TRISD
Note 1: I/O pins have protection diodes to VDD and VSS.
RD LATD
or PORTD
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PIC18C Reference Manual
DS39511A-page 11-20 2000 Microchip Technology Inc.
Table 11-7: PORTD Functions
Table 11-8: Summary of Registers Associated with PORTD
Name Bit# Buffer Type Function
RD0 bit0 ST Input/output port pin
RD1 bit1 ST Input/output port pin
RD2 bit2 ST Input/output port pin
RD3 bit3 ST Input/output port pin
RD4 bit4 ST Input/output port pin
RD5 bit5 ST Input/output port pin
RD6 bit6 ST Input/output port pin
RD7 bit7 ST Input/output port pin
Legend: ST = Schmitt Trigger input, TTL = TTL input.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TRISD PORTD Data Direction Control Register 1111 1111 1111 1111
PORTD Read PORTD pin / Write PORTD Data Latch xxxx xxxx uuuu uuuu
LATD Read PORTD Data Latch/Write PORTD Data Latch xxxx xxxx uuuu uuuu
PSPCON (1) IBF OBF IBOV PSPMODE — — — — 0000 xxxx 0000 uuuu
Legend: x = unknown, u = unchanged.
Note 1: In some devices, the four bits in the PSPCON register may be located in the upper four bits of the TRISE
register.
39500 18C Reference Manual.book Page 20 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-21
Section 11. I/O Ports
I/O Ports
11
11.6 PORTE, TRISE, and the LATE Register
PORTE can be up to an 8-bit port with Schmitt Trigger input buffers. Each pin is individually configurable
as an input or output.
Example 11-12: Initializing PORTE
Figure 11-9: Typical PORTE Block Diagram (in I/O Port Mode)
CLRF PORTE ; Initialize PORTE by clearing output
; data latches
; CLRF LATE ; Alternate method to initialize
; data output latch
MOVLW 0x03 ; Value used to initialize data direction
MOVWF TRISE ; PORTE<1:0> = inputs,
; PORTE<7:2> = outputs
Data Bus
WR PORT
WR TRIS
RD PORT
Data Latch
TRIS Latch
Schmitt
Trigger
Input
Buffer
D Q
CK Q
D Q
CK Q
Q D
EN
I/O pin (1)
RD TRIS
Note 1: I/O pins have protection diodes to VDD and VSS.
Note: On some devices with PORTE, the upper bits of the TRISE register are used for the
Parallel Slave Port control and status bits.
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PIC18C Reference Manual
DS39511A-page 11-22 2000 Microchip Technology Inc.
Table 11-9: PORTE Functions
Table 11-10: Summary of Registers Associated with PORTE
Name Bit# Buffer Type Function
RE0 bit0 ST Input/output port pin
RE1 bit1 ST Input/output port pin
RE2 bit2 ST Input/output port pin
Legend: ST = Schmitt Trigger input, TTL = TTL input.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on
all
other
resets
TRISE IBF OBF IBOV PSPMODE
— PORTE Data Direction Bits 0000 -111 0000 -111
PORTE — — — — — RE2 RE1 RE0 ---- -000 ---- -000
LATE — — — — — LATE Data Output Register ---- -xxx ---- -uuu
ADCON1 ADFM ADCS2 — — PCFG3 PCFG2 PCFG1 PCFG0 --0- 0000 --0- 0000
PSPCON (1) IBF OBF IBOV PSPMODE
— — — — 0000 xxxx 0000 uuuu
Legend: x = unknown, u = unchanged.
Note 1: In some devices, the four bits in the PSPCON register may be located in the upper four bits of the TRISE
register.
39500 18C Reference Manual.book Page 22 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-23
Section 11. I/O Ports
I/O Ports
11
11.7 PORTF, LATF, and the TRISF Register
PORTF is an 8-bit port with Schmitt Trigger input buffers. Each pin is individually configured as
an input or output.
All PORTF pins have latch bits (LATF register). The LATF register, when read, will yield the contents
of the PORTF latch, and when written, will modify the contents of the PORTF latch. This
modifies the value driven out on a pin if the corresponding TRISF bit is configured for output. This
can be used in read-modify-write instructions that allow the user to modify the contents of the
latch register regardless of the status of the corresponding pins.
PORTF pins are multiplexed with analog inputs, system bus address bits, chip enables, and the
UB and LB external bus control signals. The operation of each analog pin is selected by clearing/setting
the control bits in the ADCON0 and ADCON1 register.
The TRISF register controls the direction of the RF pins, even when they are being used as analog
inputs. The user must ensure the bits in the TRISF register are maintained set when using
them as analog inputs.
Figure 11-10: RF1:RF0 Block Diagram
Note: On all forms of Reset, the RF2:RF0 are configured as analog inputs and read as '0'.
Data Bus
WR LATF
WR TRISF
RD PORTF
Data Latch
TRIS Latch
P
VSS
I/O pin (1)
D Q
CK Q
D Q
CK Q
Q D
EN
N
VDD
RD TRISF
RD LATF
or PORTF
To Peripheral Module
Analog
Input
Mode
ST
Input
Buffer
Note 1: I/O pins have protection diodes to VDD and VSS.
39500 18C Reference Manual.book Page 23 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39511A-page 11-24 2000 Microchip Technology Inc.
Table 11-11: PORTF Functions
Table 11-12: Summary of Registers Associated with PORTF
Name Bit# Buffer Type Function
RF0 bit0 ST Input/output port pin
RF1 bit1 ST Input/output port pin
RF2 bit2 ST Input/output port pin
RF3 bit3 ST Input/output port pin
RF4 bit4 ST Input/output port pin
RF5 bit5 ST Input/output port pin
RF6 bit6 ST Input/output port pin
RF7 bit7 ST Input/output port pin
Legend: ST = Schmitt Trigger input.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TRISF PORTF Data Direction Control Register 1111 1111 1111 1111
PORTF Read PORTF pin / Write PORTF Data Latch xxxx xx00 uuuu u000
LATF Read PORTF Data Latch/Write PORTF Data Latch 0000 0000 uuuu u000
Legend: x = unknown, u = unchanged. Shaded cells are not used by Port F.
39500 18C Reference Manual.book Page 24 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-25
Section 11. I/O Ports
I/O Ports
11
11.8 PORTG, LATG, and the TRISG Register
PORTG is a 5-bit port with Schmitt Trigger input buffers. Each pin is individually configured as an
input or output.
All PORTG pins have latch bits (LATG register). The LATG register, when read, will yield the contents
of the PORTG latch, and when written, will modify the contents of the PORTG latch. This
modifies the value driven out on a pin if the corresponding TRISG bit is configured for output.
This can be used in read-modify-write instructions that allow the user to modify the contents of
the latch register regardless of the status of the corresponding pins.
Figure 11-11: PORTG Block Diagram
Data Bus
WR LATG
WR TRISG
RD PORTG
Data Latch
TRIS Latch
Schmitt
Trigger
Input
Buffer
D Q
CK
D Q
CK
Q D
EN
I/O pin (1)
RD TRISG
Note 1: I/O pins have protection diodes to VDD and VSS.
RD LATG
or PORTG
39500 18C Reference Manual.book Page 25 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39511A-page 11-26 2000 Microchip Technology Inc.
Table 11-13: PORTG Functions
Table 11-14: Summary of Registers Associated with PORTG
Name Bit# Buffer Type Function
RG0 bit0 ST Input/output port pin
RG1 bit1 ST Input/output port pin
RG2 bit2 ST Input/output port pin
RG3 bit3 ST Input/output port pin
RG4 bit4 ST Input/output port pin
RG5 bit5 ST Input/output port pin
RG6 bit6 ST Input/output port pin
RG7 bit7 ST Input/output port pin
Legend: ST = Schmitt Trigger input.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TRISG PORTG Data Direction Control Register ---1 1111 ---1 1111
PORTG Read PORTG pin / Write PORTG Data Latch ---x xxxx ---u uuuu
LATG Read PORTG Data Latch/Write PORTG Data Latch ---x xxxx ---u uuuu
Legend: x = unknown, u = unchanged.
39500 18C Reference Manual.book Page 26 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-27
Section 11. I/O Ports
I/O Ports
11
11.9 PORTH, LATH, and the TRISH Register
PORTH is an 8-bit port with Schmitt Trigger input buffers. Each pin is individually configured as
an input or output.
All PORTH pins have latch bits (LATH register). The LATH register, when read, will yield the contents
of the PORTH latch, and when written, will modify the contents of the PORTH latch. This
modifies the value driven out on a pin if the corresponding TRISH bit is configured for output. This
can be used in read-modify-write instructions that allow the user to modify the contents of the
latch register regardless of the status of the corresponding pins.
Figure 11-12: PORTH Block Diagram
Data Bus
WR LATH
WR TRISG
RD PORTH
Data Latch
TRIS Latch
Schmitt
Trigger
Input
Buffer
D Q
CK
D Q
CK
Q D
EN
I/O pin (1)
RD TRISH
Note 1: I/O pins have protection diodes to VDD and VSS.
RD LATH
or PORTH
To Peripheral Module
39500 18C Reference Manual.book Page 27 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39511A-page 11-28 2000 Microchip Technology Inc.
Table 11-15: PORTH Functions
Table 11-16: Summary of Registers Associated with PORTH
Name Bit# Buffer Type Function
RH0 bit0 ST Input/output port pin
RH1 bit1 ST Input/output port pin
RH2 bit2 ST Input/output port pin
RH3 bit3 ST Input/output port pin
RH4 bit4 ST Input/output port pin
RH5 bit5 ST Input/output port pin
RH6 bit6 ST Input/output port pin
RH7 bit7 ST Input/output port pin
Legend: TTL = TTL input.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TRISH PORTH Data Direction Control Register 1111 1111 1111 1111
PORTH Read PORTH pin / Write PORTH Data Latch 0000 xxxx 0000 uuuu
LATH Read PORTH Data Latch/Write PORTH Data Latch xxxx xxxx uuuu uuuu
Legend: x = unknown, u = unchanged, - = unimplemented. Shaded cells are not used by Port H.
39500 18C Reference Manual.book Page 28 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-29
Section 11. I/O Ports
I/O Ports
11
11.10 PORTJ, LATJ, and the TRISJ Register
PORTJ is an 8-bit port with Schmitt Trigger input buffers. Each pin is individually configured as
an input or output.
All PORTJ pins have latch bits (LATJ register). The LATJ register, when read, will yield the contents
of the PORTJ latch, and when written, will modify the contents of the PORTJ latch. This
modifies the value driven out on a pin if the corresponding TRISJ bit is configured for output. This
can be used in read-modify-write instructions that allow the user to modify the contents of the
latch register regardless of the status of the corresponding pins.
Figure 11-13: PORTJ Block Diagram
Data Bus
WR LATJ
WR TRISJ
RD PORTJ
Data Latch
TRIS Latch
Schmitt
Trigger
Input
Buffer
D Q
CK
D Q
CK
Q D
EN
I/O pin (1)
RD TRISJ
Note 1: I/O pins have protection diodes to VDD and VSS.
RD LATJ
or PORTJ
39500 18C Reference Manual.book Page 29 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39511A-page 11-30 2000 Microchip Technology Inc.
Table 11-17: PORTJ Functions
Table 11-18: Summary of Registers Associated with PORTJ
Name Bit# Buffer Type Function
RJ0 bit0 ST Input/output port pin
RJ1 bit1 ST Input/output port pin
RJ2 bit2 ST Input/output port pin
RJ3 bit3 ST Input/output port pin
RJ4 bit4 ST Input/output port pin
RJ5 bit5 ST Input/output port pin
RJ6 bit6 ST Input/output port pin
RJ7 bit7 ST Input/output port pin
Legend: ST = Schmitt Trigger input.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TRISJ PORTJ Data Direction Control Register 1111 1111 1111 1111
PORTJ Read PORTJ pin / Write PORTJ Data Latch xxxx xxxx uuuu uuuu
LATJ Read PORTJ Data Latch/Write PORTJ Data Latch xxxx xxxx uuuu uuuu
Legend: x = unknown, u = unchanged.
39500 18C Reference Manual.book Page 30 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-31
Section 11. I/O Ports
I/O Ports
11
11.11 PORTK, LATK, and the TRISK Register
PORTK is an 8-bit port with Schmitt Trigger input buffers. Each pin is individually configured as
an input or output.
Figure 11-14: PORTK Block Diagram
Data Bus
WR LATK
WR TRISK
RD PORTK
Data Latch
TRIS Latch
Schmitt
Trigger
Input
Buffer
D Q
CK
D Q
CK
Q D
EN
I/O pin (1)
RD TRISK
Note 1: I/O pins have protection diodes to VDD and VSS.
RD LATK
or PORTK
39500 18C Reference Manual.book Page 31 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39511A-page 11-32 2000 Microchip Technology Inc.
Table 11-19: PORTK Functions
Table 11-20: Summary of Registers Associated with PORTK
Name Bit# Buffer Type Function
RK0 bit0 ST Input/output port pin
RK1 bit1 ST Input/output port pin
RK2 bit2 ST Input/output port pin
RK3 bit3 ST Input/output port pin
RK4 bit4 ST Input/output port pin
RK5 bit5 ST Input/output port pin
RK6 bit6 ST Input/output port pin
RK7 bit7 ST Input/output port pin
Legend: ST = Schmitt Trigger input.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TRISK PORTK Data Direction Control Register 1111 1111 1111 1111
PORTK Read PORTK pin / Write PORTK Data Latch xxxx xxxx uuuu uuuu
LATK Read PORTK Data Latch/Write PORTK Data Latch xxxx xxxx uuuu uuuu
Legend: x = unknown, u = unchanged.
39500 18C Reference Manual.book Page 32 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-33
Section 11. I/O Ports
I/O Ports
11
11.12 PORTL, LATL, and the TRISL Register
PORTL is a 8-bit port with Schmitt Trigger input buffers. Each pin is individually configured as an
input or output.
Figure 11-15: Block Diagram of PORTL Pins
Data Bus
WR LATL
WR TRISL
RD PORTL
Data Latch
TRIS Latch
Schmitt
Trigger
Input
Buffer
D Q
CK
D Q
CK
Q D
EN
I/O pin (1)
RD TRISL
Note 1: I/O pins have protection diodes to VDD and VSS.
RD LATL
or PORTL
39500 18C Reference Manual.book Page 33 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39511A-page 11-34 2000 Microchip Technology Inc.
Table 11-21: PORTL Functions
Table 11-22: Summary of Registers Associated with PORTL
Name Bit# Buffer Type Function
RL0 bit0 ST Input/output port pin
RL1 bit1 ST Input/output port pin
RL2 bit2 ST Input/output port pin
RL3 bit3 ST Input/output port pin
RL4 bit4 ST Input/output port pin
RL5 bit5 ST Input/output port pin
RL6 bit6 ST Input/output port pin
RL7 bit7 ST Input/output port pin
Legend: ST = Schmitt Trigger input.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TRISL PORTL Data Direction Control Register 1111 1111 1111 1111
PORTL Read PORTL pin / Write PORTL Data Latch xxxx xxxx uuuu uuuu
LATL Read PORTL Data Latch/Write PORTL Data Latch xxxx xxxx uuuu uuuu
Legend: x = unknown, u = unchanged.
39500 18C Reference Manual.book Page 34 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39511A-page 11-35
Section 11. I/O Ports
I/O Ports
11
11.13 Functions Multiplexed on I/O Pins
This section discusses a couple of functions that are multiplexed on to I/O pins that are new concepts
when compared to the Mid-Range family.
11.13.1 Oscillator Configuration
If the system oscillator uses RCIO or ECIO mode, then the OSC2 pin may be used as a general
purpose I/O pin. If any other oscillator mode is used, the I/O pin multiplexed with OSC2 is disabled
and will read ‘0’, as will the TRIS bit and LAT bit associated with the I/O pin. Writes to I/O
pin will have no effect. See Table 11-23.
If the system oscillator uses RC or EC mode, then the I/O pin is configured as OSC2 and outputs
Fosc/4.
Table 11-23: RA6 Configuration for Oscillator Configuration
Figure 11-16: Block Diagram of I/O
Oscillator Configuration TRIS PORT LAT OSC2 / I/O
Function
RCIO / ERIO Read / Write Read / Write Read / Write General I/O
RC / EC Disabled
(reads 0)
Disabled
(reads 0)
Disabled
(reads 0)
FOSC/4
Other system oscillator modes Disabled
(reads 0)
Disabled
(reads 0)
Disabled
(reads 0)
OSC2
D Q
CK Q
D Q
CK Q
Q D
EN
P
N
WR TRIS
Data Latch
TRIS Latch
RD TRIS
RD PORT
Vss
VDD
I/O pin (1)
Note 1: I/O pins have protection diodes to VDD and VSS.
RD LAT
ECIO or RCIO enable
Data Bus
ECIO or
enable
Data Bus
TTL
Input
Buffer
RCIO
Data Bus
WR LAT
or PORT
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11.13.2 CCP2 Pin Multiplexing
In the PIC18CXX2 devices, the RB3 pin can be multiplexed with the CCP2 module input/output.
To achieve this, the CCP2MX configuration bit must be programmed to a ‘0’.
Figure 11-17: Block Diagram of RB3
RB LATB
P
CK
Data Bus
weak
pull-up
CCP2 Input
TTL
Buffer
Schmitt Trigger
RBPU
P
N
VDD
Vss
RB3/CCP2
CCP2MX
QD
Q
1
0
CK
QD
Q
RD TRISB
WR TRISB
Q
Q D
CK
RD PORTB
PWM2 OUT
PWM2 OUT
CCP2 IN SELECT
WR LATB or
WR PORTB
SELECT
Note: I/O pin has diode protection to VDD and VSS.
Note:To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit (INTCON2).
Note:The CCP2 input/output is multiplexed with RB3 if the CCP2MX bit is enabled (=’0’) in the configuration register.
VDD
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Section 11. I/O Ports
I/O Ports
11
11.14 I/O Programming Considerations
When using the ports as I/O, design considerations need to be taken into account to ensure that
the operation is as intended.
11.14.1 Bi-directional I/O Ports
Any instruction that performs a write operation, actually does a read followed by a write operation.
The BCF and BSF instructions, for example, read the register into the CPU, execute the bit operation
and write the result back to the register. Caution must be used when these instructions are
applied to a port with both inputs and outputs defined. For example, a BSF operation on bit5 of
PORTB will cause all eight bits of PORTB to be read into the CPU. Then the BSF operation takes
place on bit5 and PORTB is written to the output latches. If another bit of PORTB is used as a
bi-directional I/O pin (e.g., bit0) and it is defined as an input at this time, the input signal present
on the pin itself would be read into the CPU and rewritten to the data latch of this particular pin,
overwriting the previous content. As long as the pin stays in the input mode, no problem occurs.
However, if bit0 is switched to an output, the content of the data latch may now be unknown.
Reading the port register, reads the values of the port pins. Writing to the port register writes the
value to the port latch. When using read-modify-write instructions (e.g., BCF, BSF, etc.) on a
port, the value of the port pins is read, the desired operation is performed on this value, and the
value is then written to the port latch.
Example 11-13 shows the effect of two sequential read-modify-write instructions on an I/O port.
Example 11-13: Read-Modify-Write Instructions on an I/O Port
A pin configured as an output, actively driving a Low or High, should not be driven from external
devices at the same time in order to change the level on this pin (“wired-or”, “wired-and”). The
resulting high output currents may damage the chip.
; Initial PORT settings: PORTB<7:4> Inputs
; PORTB<3:0> Outputs
; PORTB<7:6> have external pull-ups and are not connected to other circuitry
;
; PORT latch PORT pins
; ---------- ---------
BCF PORTB, 7 ; 01pp pppp 11pp pppp
BCF PORTB, 6 ; 10pp pppp 11pp pppp
BCF TRISB, 7 ; 10pp pppp 11pp pppp
BCF TRISB, 6 ; 10pp pppp 10pp pppp
;
; Note that the user may have expected the pin values to be 00pp ppp.
; The 2nd BCF caused RB7 to be latched as the pin value (high).
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11.14.2 Successive Operations on an I/O Port
The actual write to an I/O port happens at the end of an instruction cycle, whereas for reading,
the data must be valid at the beginning of the instruction cycle (Figure 11-18). Therefore, care
must be exercised if a write followed by a read operation is carried out on the same I/O port. The
sequence of instructions should be such to allow the pin voltage to stabilize (load dependent)
before the next instruction that causes that file to be read into the CPU is executed. Otherwise,
the previous state of that pin may be read into the CPU rather than the new state. When in doubt,
it is better to separate these instructions with a NOP or another instruction not accessing this I/O
port.
This example shows a write to PORTB followed by a read from PORTB.
Therefore, at higher clock frequencies, a write followed by a read may be problematic due to
external capacitance.
Figure 11-18: Successive I/O Operation
Note: Data setup time = (0.25TCY - TPD),
where TCY = instruction cycle,
TPD = propagation delay.
PC PC + 1 PC + 2 PC + 3
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Instruction
fetched
RB7:RB0
MOVWF PORTB
write to
PORTB
NOP
Port pin
sampled here
NOP
MOVF PORTB,W
Instruction
executed
MOVWF PORTB
write to
PORTB
NOP
MOVF PORTB,W
PC
TPD
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Section 11. I/O Ports
I/O Ports
11
Figure 11-19 shows the I/O model that causes this situation. As the effective capacitance (C)
becomes larger, the rise/fall time of the I/O pin increases. As the device frequency increases or
the effective capacitance increases, the possibility of this subsequent PORTx read-modify-write
instruction issue increases. This effective capacitance includes the effects of the board traces.
A way to address this is to add an series resistor at the I/O pin. This resistor allows the I/O pin to
get to the desired level before the next instruction.
The use of NOP instructions between the subsequent PORTx read-modify-write instructions, is a
lower cost solution, but has the issue that the number of NOP instructions is dependent on the
effective capacitance C and the frequency of the device.
Figure 11-19: I/O Connection Issues
PIC18CXXX
I/O
C (1)
Q4 Q1 Q2 Q3 Q4 Q1
VIL
BSF PORTx, PINy
Q2 Q3
BSF PORTx, PINz
PORTx, PINy
Read PORTx, PINy as low
BSF PORTx, PINz clears the value
to be driven on the PORTx, PINy pin.
Note 1: This is not a capacitor to ground, but the effective capacitive loading on the trace.
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11.15 Initialization
See the section describing each port for examples of initialization of the ports.
Note: It is recommended that when initializing the port, the PORT data latch (LAT or PORT
register) should be initialized first, and then the data direction (TRIS register). This
will eliminate a possible pin glitch, since the LAT register (PORT data latch values)
power up in a random state.
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Section 11. I/O Ports
I/O Ports
11
11.16 Design Tips
Question 1: Code will not toggle any I/O ports, but the oscillator is running. What can I
be doing wrong?
Answer 1:
1. Have the TRIS registers been initialized properly? These registers can be written to
directly in the access bank (Bank15).
2. Is there a peripheral multiplexed onto those pins that are enabled?
3. Is the Watchdog Timer enabled (done at programming)? If it is enabled, is it being cleared
properly with a CLRWDT instruction at least every 9 ms (or more if prescaled)?
4. Are you using the correct instructions to write to the port? More than one person has used
the MOVF command when they should have used MOVWF.
5. For parts with interrupts, are the interrupts disabled? If not, try disabling them to verify they
are not interfering.
Question 2: When my program reads a port, I get a different value than what I put in the
port register. What can cause this?
Answer 2:
1. When a port is read, it is always the pin that is read, regardless of its being set to input or
output. So if a pin is set to an input, you will read the value on the pin regardless of the
register value.
2. If a pin is set to output, for instance, it has a one in the data latch; if it is shorted to ground,
you will still read a zero on the pin. This is very useful for building fault tolerant systems,
or handling I2C bus conflicts. (The I2C bus is only driven low, and the pin is high impedance
for a one. If the pin is low and you are not driving it, some other device is trying to
take the bus).
3. Enhanced devices all have at least one open drain (or open collector) pin. These pins can
only drive a zero or high impedance. For most Enhanced devices, this is pin RA4. Open
drain pins must have a pull-up resistor to have a high state. This pin is useful for driving
odd voltage loads. The pull-up can be connected to a voltage (typically less than VDD)
which becomes the high state.
4. Some analog modules, when enabled, will force a read value of ‘0’ from the pin, regardless
of the voltage level on the pin.
Question 3: I have a PIC18CXX2 with pin RB0 configured as an interrupt input, but am
not getting interrupted. When I change my routine to poll the pin, it reads
the high input and operates fine. What is the problem?
Answer 3:
PORTB accepts TTL input levels (on most parts), so when you have an input of say 3V (with
VDD = 5V), you will read a ‘1’. However, the buffer to the interrupt structure from pin RB0 is a
Schmitt Trigger, which requires a higher voltage (than TTL input) before the high input is registered.
So it is possible to read a ‘1’, but not get the interrupt. The interrupt was given a Schmitt
Trigger input with hysteresis to minimize noise problems. It is one thing to have short noise spikes
on a pin that is a data input that can potentially cause bad data, but quite another to permit noise
to cause an interrupt, hence the difference.
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Question 4: When I perform a BCF instruction, other pins get cleared in the port. Why?
Answer 4:
1. Another case where a read-modify-write instruction may seem to change other pin values
unexpectedly can be illustrated as follows: Suppose you make PORTC all outputs, and
drive the pins low. On each of the port pins is an LED connected to ground, such that a
high output lights it. Across each LED is a 100 µF capacitor. Let's also suppose that the
processor is running very fast, say 20 MHz. Now if you go down the port, setting each pin
in order; BSF PORTC,0 then BSF PORTC,1 then BSF PORTC,2 and so on, you may see
that only the last pin was set, and only the last LED actually turns on. This is because the
capacitors take a while to charge. As each pin was set, the pin before it was not charged
yet, and so was read as a zero. This zero is written back out to the port latch (r-m-w,
remember), which clears the bit you just tried to set in the previous instruction. This is usually
only a concern at high speeds and for successive port operations, but it can happen,
so take it into consideration.
2. If this is on a PIC18CXXX device with A/D, you have not configured the I/O pins properly
in the ADCON1 register. If a pin is configured for analog input, any read of that pin will read
a zero, regardless of the voltage on the pin. This is an exception to the normal rule that
the pin state is always read. You can still configure an analog pin as an output in the TRIS
register, and drive the pin high or low by writing to it, but you will always read a zero. Therefore,
if you execute a Read-Modify-Write instruction (see previous question), all analog
pins are read as zero; those not directly modified by the instruction will be written back to
the port latch as zero. A pin configured as analog is expected to have values that may be
neither high nor low to a digital pin, or floating. Floating inputs on digital pins are a no-no,
and can lead to high current draw in the input buffer, so the input buffer is disabled.
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Section 11. I/O Ports
I/O Ports
11
11.17 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is they may be written for
the Baseline, the Midrange, or High-end families), but the concepts are pertinent, and could be
used (with modification and possible limitations). The current application notes related to I/O
ports are:
Title Application Note #
Improving the Susceptibility of an Application to ESD AN595
Clock Design using Low Power/Cost Techniques AN615
Implementing Wake-up on Keystroke AN528
Interfacing to AC Power Lines AN521
Multiplexing LED Drive and a 4 x 4 Keypad Sampling AN529
Using PIC16C5X as an LCD Drivers AN563
Serial Port Routines Without Using TMR0 AN593
Implementation of an Asynchronous Serial I/O AN510
Using the PORTB Interrupt on Change Feature as an External Interrupt AN566
Implementing Wake-up on Keystroke AN522
Apple Desktop Bus AN591
Software Implementation of Asynchronous Serial I/O AN555
Communicating with the I2C Bus using the PIC16C5X AN515
Interfacing 93CX6 Serial EEPROMs to the PIC16C5X Microcontrollers AN530
Logic Powered Serial EEPROMs AN535
Interfacing 24LCXXB Serial EEPROMs to the PIC16C54 AN567
Using the 24XX65 and 24XX32 with Stand-alone PIC16C54 Code AN558
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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11.18 Revision History
Revision A
This is the initial released revision of the Enhanced MCU I/O Ports description.
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Parallel
Slave Port
12
Section 12. Parallel Slave Port
HIGHLIGHTS
This section of the manual contains the following major topics:
12.1 Introduction .................................................................................................................. 12-2
12.2 Control Register ........................................................................................................... 12-3
12.3 Operation ..................................................................................................................... 12-5
12.4 Operation in SLEEP Mode........................................................................................... 12-6
12.5 Effect of a RESET........................................................................................................ 12-6
12.6 PSP Waveforms ........................................................................................................... 12-6
12.7 Design Tips .................................................................................................................. 12-8
12.8 Related Application Notes............................................................................................ 12-9
12.9 Revision History ......................................................................................................... 12-10
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12.1 Introduction
Some devices have an 8-bit wide Parallel Slave Port (PSP). This port is multiplexed onto one of
the device’s I/O ports. The port operates as an 8-bit wide Parallel Slave Port, or microprocessor
port, when the PSPMODE control bit is set. In this mode, the input buffers are TTL.
In slave mode, the module is asynchronously readable and writable by the external world through
the RD control input pin and the WR control input pin.
It can directly interface to an 8-bit microprocessor data bus. The external microprocessor can
read or write the PORT latch as an 8-bit latch. Setting the PSPMODE bit enables port pins to be
the RD input, the WR input, and the CS (chip select) input.
There are actually two 8-bit latches, one for data-out (from the PICmicro) and one for data input.
The user writes 8-bit data to the PORT data latch and reads data from the port pin latch (note
that they have the same address). In this mode, the TRIS register is ignored, since the microprocessor
is controlling the direction of data flow.
Register 12-1 shows the block diagram for the PSP module.
Figure 12-1: PORTD and PORTE Block Diagram (Parallel Slave Port)
Note 1: At present the Parallel Slave Port (PSP) is only multiplexed onto PORTD and
PORTE. The microprocessor port becomes enabled when the PSPMODE bit is set.
In this mode, the user must make sure that PORTD and PORTE are configured as
digital I/O. That is, peripheral modules multiplexed onto the PSP functions are disabled
(such as the A/D).
When PORTE is configured for digital I/O, PORTD will override the values in the
TRISD register.
2: In this mode the PORTD and PORTE input buffers are TTL. The control bits for the
PSP operation are located in TRISE.
EN
D Q
CK
Data Bus
WR LATD
RD PORTD
One bit of PORTD
Set interrupt flag
PSPIF
PSP<7:0>
TTL
TTL
Read
Chip Select
Write
RD
CS
WR
EN
Q D
EN
TTL
TTL
or PORTD
RD LATD
Note: I/O pins have protection diodes to VDD and VSS.
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Section 12. Parallel Slave Port
Parallel
Slave Port
12
12.2 Control Register
Register 12-1 is the PSP control register (PSPCON). The TRISE register (Register 12-2) contains
the 4 bits for the PSP module found in some devices (such as PIC18C4X2) for compatibility
with 40-pin midrange devices.
Register 12-1: PSPCON Register
R-0 R-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0
IBF OBF IBOV PSPMODE — — — —
bit 7 bit 0
bit 7 IBF: Input Buffer Full Status bit
1 = A word has been received and waiting to be read by the CPU
0 = No word has been received
bit 6 OBF: Output Buffer Full Status bit
1 = The output buffer still holds a previously written word
0 = The output buffer has been read
bit 5 IBOV: Input Buffer Overflow Detect bit (in microprocessor mode)
1 = A write occurred when a previously input word has not been read
(must be cleared in software)
0 = No overflow occurred
bit 4 PSPMODE: Parallel Slave Port Mode Select bit
1 = Parallel slave port mode
0 = General purpose I/O mode
bits 3:0 Unimplemented: Read as '0'
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Register 12-2: TRISE Register
R-0 R-0 R/W-0 R/W-0 U-0 R/W-1 R/W-1 R/W-1
IBF OBF IBOV PSPMODE — TRISE2 TRISE1 TRISE0
bit 7 bit 0
bit 7 IBF: Input Buffer Full Status bit
1 = A word has been received and waiting to be read by the CPU
0 = No word has been received
bit 6 OBF: Output Buffer Full Status bit
1 = The output buffer still holds a previously written word
0 = The output buffer has been read
bit 5 IBOV: Input Buffer Overflow Detect bit (in microprocessor mode)
1 = A write occurred when a previously input word has not been read
(must be cleared in software)
0 = No overflow occurred
bit 4 PSPMODE: Parallel Slave Port Mode Select bit
1 = Parallel slave port mode
0 = General purpose I/O mode
bit 3 Unimplemented: Read as '0'
bit 2 TRISE2: RE2 Direction Control bit
1 = Input
0 = Output
bit 1 TRISE1: RE1 Direction Control bit
1 = Input
0 = Output
bit 0 TRISE0: RE0 Direction Control bit
1 = Input
0 = Output
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 12. Parallel Slave Port
Parallel
Slave Port
12
12.3 Operation
A write to the PSP from the external system occurs when both the CS and WR lines are first
detected low. When either the CS or WR lines become high (edge triggered), the Input Buffer Full
status flag bit IBF is set on the Q4 clock cycle following the next Q2 cycle. This signals that the
write is complete. The interrupt flag bit, PSPIF, is also set on the same Q4 clock cycle. The IBF
flag bit is inhibited from being cleared for additional TCY cycles (see parameter 66 in the "Electrical
Specifications" section). If the IBF flag bit is cleared by reading the PORTD input latch,
then this has to be a read-only instruction (i.e., MOVF) and not a read-modify-write instruction.
The Input Buffer Overflow status flag bit IBOV is set if a second write to the Parallel Slave Port is
attempted when the previous byte has not been read out of the buffer.
A read of the PSP from the external system occurs when both the CS and RD lines are first
detected low. The Output Buffer Full status flag bit OBF is cleared immediately indicating that the
PORTD latch was read by the external bus. When either the CS or RD pin becomes high (edge
triggered), the interrupt flag bit, PSPIF, is set on the Q4 clock cycle following the next Q2 cycle,
indicating that the read is complete. OBF remains low until data is written to PORTD by the user
firmware.
Input Buffer Full Status Flag bit, IBF, is set if a received word is waiting to be read by the CPU.
Once the PORT input latch is read, the IBF bit is cleared. The IBF bit is a read only status bit.
Output Buffer Full Status Flag bit, OBF, is set if a word written to the PORT latch is waiting to be
read by the external bus. Once the PORTD output latch is read by the microprocessor, OBF is
cleared. Input Buffer Overflow Status Flag bit, IBOV, is set if a second write to the microprocessor
port is attempted when the previous word has not been read by the CPU (the first word is retained
in the buffer).
When not in Parallel Slave Port mode, the IBF and OBF bits are held clear. However, if the IBOV
bit was previously set, it must be cleared in the software.
An interrupt is generated and latched into flag bit PSPIF when a read or a write operation is completed.
Interrupt flag bit PSPIF must be cleared by user software and the interrupt can be disabled
by clearing interrupt enable bit PSPIE.
Table 12-1: PORTE Functions
Name Function
RD Read Control Input in parallel slave port mode:
RD
1 = Not a read operation
0 = Read operation. Reads PORTD register (if chip selected)
WR Write Control Input in parallel slave port mode:
WR
1 = Not a write operation
0 = Write operation. Writes PORTD register (if chip selected)
CS Chip Select Control Input in parallel slave port mode:
CS
1 = Device is not selected
0 = Device is selected
Note: The PSP may have other functions multiplexed onto the same pins. For the PSP to
operate, the pins must be configured as digital I/O.
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12.4 Operation in SLEEP Mode
When in SLEEP mode, the microprocessor may still read and write the Parallel Slave Port. These
actions will set the PSPIF bit. If the PSP interrupts are enabled, this will wake the processor from
SLEEP mode so that the PSP data latch may be either read, or written with the next value for the
microprocessor.
12.5 Effect of a RESET
After any RESET, the PSP is disabled and PORTD and PORTE are forced to their default mode.
12.6 PSP Waveforms
Register 12-2 shows the waveform for a write from the microprocessor to the PSP, while
Register 12-3 shows the waveform for a read of the PSP by the microprocessor.
Figure 12-2: Parallel Slave Port Write Waveforms
Figure 12-3: Parallel Slave Port Read Waveforms
Q1 Q2 Q3 Q4
CS
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
WR
RD
IBF
OBF
PSPIF
PORTD<7:0>
Q1 Q2 Q3 Q4
CS
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
WR
IBF
PSPIF
RD
OBF
PORTD<7:0>
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Section 12. Parallel Slave Port
Parallel
Slave Port
12
Table 12-2: Registers Associated with Parallel Slave Port
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR, BOR
Value on all
other resets
PORTD Port data latch when written; port pins when read xxxx xxxx uuuu uuuu
LATD LATD Data Output Bits xxxx xxxx uuuu uuuu
TRISD PORTD Data Direction Bits 1111 1111 1111 1111
PORTE (1) — — — — — RE2 RE1 RE0 ---- -000 ---- -000
LATE — — — — — LATE Data Output Bits ---- -xxx ---- -uuu
TRISE (1) IBF OBF IBOV PSPMODE — PORTE Data Direction Bits 0000 -111 0000 -111
PSPCON IBF OBF IBOV PSPMODE — — — — 0000 ---- 0000 ----
INTCON GIE/
GIEH
PEIE/
GIEL
TMR0IF INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIR1 PSPIF ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
PIE1 PSPIE ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
IPR1 PSPIP ADIP RCIP TXIP SSPIP CCP1IP TMR2IP TMR1IP 0000 0000 0000 0000
ADCON1 ADFM ADCS2 — — PCFG3 PCFG2 PCFG1 PCFG0 --0- -000 --0- -000
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'.
Shaded cells are not used by the Parallel Slave Port.
Note 1: On some devices the entire PORTE will be implemented with I/O functions. In these devices, the TRISE register will contain
the eight data direction bits and the PSP bits will be located in the PSPCON register.
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12.7 Design Tips
Question 1: Migrating from the PIC16C74 to the PIC18CXX2, the operation of the PSP
seems to have changed.
Answer 1:
Yes, a design change was made so the PIC18CXX2 is edge sensitive (while the PIC16C74 was
level sensitive).
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Section 12. Parallel Slave Port
Parallel
Slave Port
12
12.8 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced MCU family (that is, they may be written
for the Base-Line, the Mid-Range or High-End families), but the concepts are pertinent, and
could be used (with modification and possible limitations). The current application notes related
to the Parallel Slave Port are:
Title Application Note #
Using the 8-bit Parallel Slave Port AN579
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
39500 18C Reference Manual.book Page 9 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39512-page 12-10 2000 Microchip Technology Inc.
12.9 Revision History
Revision A
This is the initial released revision of the Parallel Slave Port description.
39500 18C Reference Manual.book Page 10 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39513A-page 13-1
Timer0
13
Section 13. Timer0
HIGHLIGHTS
This section of the manual contains the following major topics:
13.1 Introduction .................................................................................................................. 13-2
13.2 Control Register ........................................................................................................... 13-3
13.3 Operation ..................................................................................................................... 13-4
13.4 Timer0 Interrupt ........................................................................................................... 13-5
13.5 Using Timer0 with an External Clock ........................................................................... 13-6
13.6 Timer0 Prescaler.......................................................................................................... 13-7
13.7 Initialization .................................................................................................................. 13-9
13.8 Design Tips ................................................................................................................ 13-10
13.9 Related Application Notes.......................................................................................... 13-11
13.10 Revision History ......................................................................................................... 13-12
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PIC18C Reference Manual
DS39513A-page 13-2 2000 Microchip Technology Inc.
13.1 Introduction
The Timer0 module has the following features:
• Software selectable as an 8-bit or 16-bit timer/counter
• Readable and writable
• Dedicated 8-bit software programmable prescaler
• Clock source selectable to be external or internal
• Interrupt on overflow from FFh to 00h (FFFFh to 0000h in 16-bit mode)
• Edge select for external clock
Figure 13-1 shows a simplified block diagram of the Timer0 module in 8-bit mode and
Figure 13-2 shows a simplified block diagram of the Timer0 module in 16-bit mode.
Figure 13-1: Timer0 Block Diagram in 8-bit Mode
Figure 13-2: Timer0 Block Diagram in 16-bit Mode
T0CKI pin
T0SE
0
1
0
1
T0CS
FOSC/4
Programmable
Prescaler
Sync with
Internal
clocks
TMR0
PSOUT
(2 TCY delay)
POUT
Data Bus
8
PSA
T0PS2:T0PS0 Set interrupt
flag bit T0IF
on overflow
3
Note 1: T0CS, T0SE, PSA, T0PS2:T0PS0 (T0CON<5:0>).
2: Upon reset, Timer0 is enabled in 8-bit mode, with clock input from T0CKI, max. prescale.
Note 1: T0CS, T0SE, PSA, T0PS2:T0PS0 (T0CON<5:0>).
2: Upon reset, Timer0 is enabled in 8-bit mode, with clock input from T0CKI, max. prescale.
T0CKI pin
T0SE
0
1
0
1
T0CS
FOSC/4
Programmable Prescaler
Sync with
Internal
clocks
TMR0L PSOUT
(2 TCY delay)
POUT
Data Bus<7:0>
8
PSA
T0PS2:T0PS0
3
TMR0
TMR0H
High Byte
8 8
8
Read TMR0L
Write TMR0L
Set interrupt
flag bit T0IF
on overflow
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2000 Microchip Technology Inc. DS39513A-page 13-3
Section 13. Timer0
Timer0
14
13.2 Control Register
The T0CON register is a readable and writable register that controls all the aspects of Timer0,
including the prescale selection.
Register 13-1: T0CON: TImer0 Control Register
R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1
TMR0ON T08BIT T0CS T0SE PSA T0PS2 T0PS1 T0PS0
bit 7 bit 0
bit 7 TMR0ON: Timer0 On/Off Control bit
1 = Enables Timer0
0 = Stops Timer0
bit 6 T08BIT: Timer0 8-bit/16-bit Control bit
1 = Timer0 is configured as an 8-bit timer/counter
0 = Timer0 is configured as a 16-bit timer/counter
bit 5 T0CS: Timer0 Clock Source Select bit
1 = Transition on T0CKI pin is clock (counter mode)
0 = Internal instruction cycle is clock (timer mode)
bit 4 T0SE: Timer0 Source Edge Select bit
1 = Increment on high-to-low transition on T0CKI pin
0 = Increment on low-to-high transition on T0CKI pin
bit 3 PSA: Timer0 Prescaler Assignment bit
1 = Timer0 prescaler is NOT assigned. Timer0 clock input bypasses prescaler.
0 = Timer0 prescaler is assigned. Timer0 clock input comes from prescaler output.
bit 2-0 T0PS2:T0PS0: Timer0 Prescaler Select bits
These bits are ignored if PSA = 1
111 = 1:256 prescale value
110 = 1:128 prescale value
101 = 1:64 prescale value
100 = 1:32 prescale value
011 = 1:16 prescale value
010 = 1:8 prescale value
001 = 1:4 prescale value
000 = 1:2 prescale value
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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PIC18C Reference Manual
DS39513A-page 13-4 2000 Microchip Technology Inc.
13.3 Operation
When initializing Timer0, several options need to be specified. This is done by programming the
appropriate bits in the T0CON register.
13.3.1 8-Bit/16-Bit Modes
Timer0 can be configured as an 8-bit or a 16-bit counter. The default state for Timer0 is an 8-bit
counter. To configure the timer as a 16-bit counter, the T08BIT bit (T0CON register) must be
cleared.
If the timer is configured as an 8-bit timer, the MSB of TMR0 (TMR0H) is held clear and will read
00h.
Normally once the mode of the timer is selected, it is not changed. Some applications may
require the ability to switch back and forth between 8-bit and 16-bit modes. The two cases are:
1. Changing from 8-bit to 16-bit mode
2. Changing from 16-bit to 8-bit mode
The condition when bit 7 of the Timer0 rolls over must be addressed.
If Timer0 is configured as an 8-bit timer and is changed to a 16-bit timer on the same cycle as a
rollover occurs, no interrupt is generated.
If Timer0 is configured as a 16-bit timer and is changed to an 8-bit timer on the same cycle as a
rollover occurs, the TMR0IF bit will be set.
13.3.1.1 16-Bit Mode Timer Reads
TMR0H is not the high byte of the timer/counter, but actually a buffered version of the high byte
of Timer0. The high byte of the Timer0 counter/timer is not directly readable or writable. TMR0H
is updated with the contents of the high byte of Timer0 during a read of TMR0L. This provides a
user with the ability to read all 16 bits of Timer0 without having to verify that the read of the high
and low byte were valid due to a rollover between successive reads of the high and low byte. The
user simply reads the low byte of Timer0, followed by a read of TMR0H, which contains the value
in the high byte of Timer0 at the time that the low byte was read.
13.3.1.2 16-Bit Mode Timer Write
A write to the high byte of Timer0 must also take place through the TMR0H buffer register.
Timer0 high byte is updated with the contents of TMR0H when a write occurs to TMR0L. This
allows a user to update all 16 bits to both the high and low bytes of Timer0 at once (see
Figure 13-2).
When performing a write of TMR0, the carry is held off during the write of the TMR0L register.
Writes to the TMR0H register only modify the holding latch, not the timer (TMR0<15:8>).
Steps to write to the TMR0:
1. Load the TMR0H register.
2. Write to the TMR0L register.
13.3.1.3 16-Bit Read/Modify Write
Read-modify-write instructions like BSF or BCF, read the contents of a register, make the appropriate
changes, and place the result back into the register. The read cycle of a read-modify-write
instruction of TMR0L will not update the contents of the TMR0H buffer. The TMR0H buffer will
remain unchanged. When the write cycle (to TMR0L) of the instruction takes place, the contents
of TMR0H are placed into the high byte of Timer0.
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2000 Microchip Technology Inc. DS39513A-page 13-5
Section 13. Timer0
Timer0
14
13.3.2 Timer/Counter Modes
Timer mode is selected by clearing the T0CS bit (T0CON register). In timer mode, the Timer0
module will increment every instruction cycle (without prescaler). If the TMR0 register is written,
the increment is inhibited for the following two instruction cycles. The user can work around this
by writing an adjusted value to the TMR0 register.
Counter mode is selected by setting the T0CS bit (T0CON register). In counter mode, Timer0 will
increment either on every rising or falling edge of the T0CKI pin. The incrementing edge is determined
by the Timer0 Source Edge Select bit T0SE (T0CON register). Clearing the T0SE bit
selects the rising edge. Restrictions on the external clock input are discussed in detail in Section
13.5.1.
13.4 Timer0 Interrupt
The TMR0 interrupt flag bit is set when the TMR0 register overflows. When TMR0 is in 8-bit
mode, this means the overflow from FFh to 00h. When TMR0 is in 16-bit mode, this means the
overflow from FFFFh to 0000h.
This overflow sets the TMR0IF bit (INTCON register). The interrupt can be disabled by clearing
the TMR0IE bit (INTCON register). The TMR0IF bit must be cleared in software by the interrupt
service routine. The TMR0 interrupt cannot awaken the processor from SLEEP, since the timer
is shut off during SLEEP. See Figure 13-3 for Timer0 interrupt timing.
Figure 13-3: TMR0 Interrupt Timing
Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2 Q1 Q3 Q4 Q2
1 1
OSC1
CLKO(3)
8-bit Timer0
TMR0IF bit
(INTCON<2>)
FEh
GIE bit
(INTCON<7>)
INSTRUCTION
PC
Instruction
fetched
PC PC + 2 PC + 4 PC + 4 0008h
Instruction
executed
Inst (PC)
Inst (PC-2)
Inst (PC+2)
Inst (PC)
Inst (0008h)
Dummy cycle Dummy cycle
FFh 00h 01h 02h
FLOW
16-bit Timer0 FFFEh FFFFh 0000h 0001h 0002h
1
Inst (PC+4)
Inst (PC+2)
Note 1: Interrupt flag bit TMR0IF is sampled here (every Q1).
2: Interrupt latency = 4TCY where TCY = instruction cycle time.
3: CLKO is available only in RC oscillator mode.
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DS39513A-page 13-6 2000 Microchip Technology Inc.
13.5 Using Timer0 with an External Clock
When an external clock input is used for Timer0, it must meet certain requirements as detailed
in 13.5.1 “External Clock Synchronization”. The requirements ensure the external clock can
be synchronized with the internal phase clock (TSCLK). Also, there is a delay in the actual incrementing
of Timer0 after synchronization.
13.5.1 External Clock Synchronization
When no prescaler is used, the external clock input is used instead of the prescaler output. The
synchronization of T0CKI with the internal phase clocks is accomplished by sampling the prescaler
output on the Q2 and Q4 cycles of the internal phase clocks (Figure 13-4). Therefore, it is
necessary for T0CKI to be high for at least 2TSCLK (and a small RC delay) and low for at least
2TSCLK (and a small RC delay). Refer to parameters 40, 41 and 42 in the electrical specification
of the desired device.
When a prescaler is used, the external clock input is divided by the prescaler so that the prescaler
output is symmetrical. For the external clock to meet the sampling requirement, the ripple-counter
must be taken into account. Therefore, it is necessary for T0CKI to have a period of
at least 4TSCLK (and a small RC delay) divided by the prescaler value. The only requirement on
T0CKI high and low time is that they do not violate the minimum pulse width requirement. Refer
to parameters 40, 41 and 42 in the electrical specification of the desired device.
13.5.2 TMR0 Increment Delay
Since the prescaler output is synchronized with the internal clocks, there is a small delay from
the time the external clock edge occurs to the time the Timer0 module is actually incremented.
Figure 13-4 shows the delay from the external clock edge to the timer incrementing.
Figure 13-4: Timer0 Timing with External Clock
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
External Clock Input or
Prescaler output(2)
External Clock/Prescaler
Output after sampling
Increment Timer0 (Q4)
Timer0 T0 T0 + 1 T0 + 2
Small pulse
misses sampling
(3)
(1)
Note 1: Delay from clock input change to Timer0 increment is 3Tosc to 7Tosc. (Duration of Q = Tosc).
Therefore, the error in measuring the interval between two edges on Timer0 input = ±4Tosc max.
2: External clock if no prescaler selected, prescaler output otherwise.
3: The arrows indicate the points in time where sampling occurs.
39500 18C Reference Manual.book Page 6 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39513A-page 13-7
Section 13. Timer0
Timer0
14
13.6 Timer0 Prescaler
An 8-bit counter is available as a prescaler for the Timer0 module (Figure 13-5).
The PSA and T0PS2:T0PS0 bits (T0CON register) are the prescaler enable and prescale select
bits.
All instructions that write to the Timer0 (TMR0) register (such as: CLRF TMR0; BSF TMR0,x;
MOVWF TMR0; ....etc.) will clear the prescaler if enabled. The prescaler is not readable or writable.
Writes to TMR0H do not clear the Timer0 prescaler in 16-bit mode, because a write to TMR0H
only modifies the Timer0 latch and does not change the contents of Timer0. The prescaler is only
cleared on writes to TMR0L.
Figure 13-5: Block Diagram of the Timer0 Prescaler
The prescaler for Timer0 is enabled or disabled in software by the PSA bit (T0CON register). Setting
the PSA bit will enable the prescaler. The prescaler can be modified under software control
through the T0PS2:T0PS0 bits. This allows the prescaler reload value to be readable and writable.
The prescaler count value (the contents of the prescaler) can not be read or written. When
the prescaler is enabled, prescale values of 1:2, 1:4, ..., 1:256 are selectable.
T0CKI pin
T0SE
M
U
X
CLKO (=FOSC/4)
TMR0L
8-bit Prescaler
T0PS2:T0PS0 8 - to - 1 MUX
8
M
U
X
0
1 1
0
Data Bus
Set flag bit
8
PSA T0CS
TMR0
TMR0IF
on overflow
Data Bus
8
T08BIT
T08BIT
Set flag bit
TMR0IF
on overflow
for TMR0L
TMR0H
high reg
8
Synchronization 2 TCY
delay
Note: T0CS, T0SE, PSA, T0PS2:T0PS0 are located in the T0CON register.
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PIC18C Reference Manual
DS39513A-page 13-8 2000 Microchip Technology Inc.
Any write to the TMR0 register will cause a 2 instruction cycle (2TCY) inhibit. That is, after the
TMR0 register has been written with the new value, TMR0 will not be incremented until the third
instruction cycle later (Figure 13-6). When the prescaler is assigned to the Timer0 module, any
write to the TMR0 register will immediately update the TMR0 register and clear the prescaler.
The incrementing of Timer0 (TMR0 and Prescaler) will also be inhibited 2 instruction cycles
(TCY). So if the prescaler is configured as 2, then after a write to the TMR0 register, TMR0 will
not increment for 4 Timer0 clocks (Figure 13-7). After that, TMR0 will increment every prescaler
number of clocks later.
Figure 13-6: Timer0 Timing: Internal Clock/No Prescale
Figure 13-7: Timer0 Timing: Internal Clock/Prescale 1:2
Table 13-1: Registers Associated with Timer0
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR, BOR
Value on all
other resets
TMR0L Timer0 Module’s Low Byte Register xxxx xxxx uuuu uuuu
TMR0H Timer0 Module’s High Byte Register 0000 0000 0000 0000
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
T0CON TMR0ON T08BIT T0CS T0SE PSA T0PS2 T0PS1 T0PS0 1111 1111 1111 1111
TRISA — — PORTA Data Direction Register --11 1111 --11 1111
Legend: x = unknown, u = unchanged, - = unimplemented locations read as '0'.
Shaded cells are not used by Timer0.
PC-2
PC Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
(Program
Counter)
Instruction
Fetch
TMR0
PC PC+2 PC+4 PC+6 PC+8 PC+10 PC+12
T0 T0+1 T0+2 NT0 NT0 NT0 NT0+1 NT0+2 T0
MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
Write TMR0
executed
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0 + 1
Read TMR0
reads NT0 + 2
Instruction
Executed
PC+6
PC-2
PC Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
(Program
Counter)
Instruction
Fetch
TMR0
PC PC+2 PC+4 PC+6 PC+8 PC+10 PC+12
T0 NT0+1
MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
Write TMR0
executed
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0 + 1
T0+1 NT0
Instruction
Execute
39500 18C Reference Manual.book Page 8 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39513A-page 13-9
Section 13. Timer0
Timer0
14
13.7 Initialization
Since Timer0 has a software programmable clock source, there are two examples to show the
initialization of Timer0 with each source. Example 13-1 shows the initialization for the internal
clock source (timer mode), while Example 13-2 shows the initialization for the external clock
source (counter mode).
Example 13-1: Timer0 Initialization (Internal Clock Source)
Example 13-2: Timer0 Initialization (External Clock Source)
CLRF TMR0 ; Clear Timer0 register
CLRF INTCON ; Disable interrupts and clear T0IF
BCF INTCON2, RBPU ;
MOVLW 0x80 ; PortB pull-ups are disabled,
MOVWF T0CON ; Interrupt on rising edge of RB0,
; TMR0 = 16-Bit Time
; Timer0 increment from internal clock
; with a prescaler of 1:2.
;** BSF INTCON, T0IE ; Enable TMR0 interrupt
;** BSF INTCON, GIE ; Enable all interrupts
;
; The TMR0 interrupt is disabled, do polling on the overflow bit
;
T0_OVFL_WAIT
BTFSS INTCON, T0IF
GOTO T0_OVFL_WAIT
; Timer has overflowed
CLRF TMR0 ; Clear Timer0 register
CLRF INTCON ; Disable interrupts and clear T0IF
BCF INTCON2, RBPU ;
MOVLW 0xBF ; PortB pull-ups are enabled,
MOVWF T0CON ; Interrupt on falling edge of RB0
; Timer0 increment from external clock
; on the high-to-low transition
; of T0CKI
; with a prescaler of 1:256.
;** BSF INTCON, T0IE ; Enable TMR0 interrupt
;** BSF INTCON, GIE ; Enable all interrupts
;
; The TMR0 interrupt is disabled, do polling on the overflow bit
;
T0_OVFL_WAIT
BTFSS INTCON, T0IF
GOTO T0_OVFL_WAIT
; Timer has overflowed
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PIC18C Reference Manual
DS39513A-page 13-10 2000 Microchip Technology Inc.
13.8 Design Tips
Question 1: I am implementing a counter/clock, but the clock loses time or is inaccurate.
Answer 1:
If you are polling TMR0 to see if it has rolled over to zero, you could do this by executing:
wait MOVF TMR0,W ; read the timer into W
BTFSS STATUS,Z ; see if it was zero, if so,
; break from loop
GOTO wait ; if not zero yet, keep waiting
Two possible scenarios to lose clock cycles are:
1. If you are incrementing TMR0 from the internal instruction clock (or an external source that
is about as fast), the overflow could occur during the two cycle GOTO, so you could miss
it. In this case, the TMR0 source should be prescaled.
2. When writing to TMR0, two instruction clock cycles are lost. Often you have a specific time
period you want to count, say 100 decimal. In that case, you might put 156 into TMR0
(256 - 100 = 156). However, since two instruction cycles are lost when you write to TMR0
(for internal logic synchronization), you should actually write 158 to the timer.
39500 18C Reference Manual.book Page 10 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39513A-page 13-11
Section 13. Timer0
Timer0
14
13.9 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is, they may be written for
the Base-Line, the Mid-Range or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to
Timer0 are:
Title Application Note #
Frequency Counter Using PIC16C5X AN592
A Clock Design using the PIC16C54 for LED Display and Switch Inputs AN590
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
39500 18C Reference Manual.book Page 11 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39513A-page 13-12 2000 Microchip Technology Inc.
13.10 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Timer0 Module description.
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2000 Microchip Technology Inc. DS39514A-page 14-1
Timer1
14
Section 14. Timer1
HIGHLIGHTS
This section of the manual contains the following major topics:
14.1 Introduction .................................................................................................................. 14-2
14.2 Control Register ........................................................................................................... 14-4
14.3 Timer1 Operation in Timer Mode ................................................................................. 14-5
14.4 Timer1 Operation in Synchronized Counter Mode....................................................... 14-5
14.5 Timer1 Operation in Asynchronous Counter Mode...................................................... 14-6
14.6 Reading and Writing of Timer1 .................................................................................... 14-7
14.7 Timer1 Oscillator........................................................................................................ 14-10
14.8 Typical Application ..................................................................................................... 14-11
14.9 Sleep Operation ......................................................................................................... 14-12
14.10 Resetting Timer1 Using a CCP Trigger Output.......................................................... 14-12
14.11 Resetting Timer1 Register Pair (TMR1H:TMR1L) ..................................................... 14-13
14.12 Timer1 Prescaler........................................................................................................ 14-13
14.13 Initialization ................................................................................................................ 14-14
14.14 Design Tips ................................................................................................................ 14-16
14.15 Related Application Notes.......................................................................................... 14-17
14.16 Revision History ......................................................................................................... 14-18
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DS39514A-page 14-2 2000 Microchip Technology Inc.
14.1 Introduction
The Timer1 module is a 16-bit timer/counter consisting of two 8-bit registers (TMR1H and
TMR1L) that are readable and writable. The TMR1 register pair (TMR1H:TMR1L) increments
from 0000h to FFFFh and rolls over to 0000h. If enabled, the Timer1 Interrupt is generated on
overflow that is latched in the TMR1IF interrupt flag bit. This interrupt can be enabled/disabled
by setting/clearing the TMR1IE interrupt enable bit.
Timer1 can operate in one of three modes:
• As a synchronous timer
• As a synchronous counter
• As an asynchronous counter
The operating mode is determined by clock select bit, TMR1CS (T1CON register), and the synchronization
bit, T1SYNC (Figure 14-1).
In timer mode, Timer1 increments every instruction cycle. In counter mode, it increments on
every rising edge of the external clock input pin T1OSI.
Timer1 can be turned on and off using theTMR1ON control bit (T1CON register).
Timer1 also has an internal “reset input”, which can be generated by a CCP module.
Timer1 has the capability to operate off an external crystal. When the Timer1 oscillator is enabled
(T1OSCEN is set), the T1OSI and T1OSO pins become inputs, so their corresponding TRIS values
are ignored.
Figure 14-1: Timer1 Block Diagram
TMR1H TMR1L
T1SYNC
TMR1CS
T1CKPS1:T1CKPS0 SLEEP input
TMR1ON
on/off
Prescaler
1, 2, 4, 8
Synchronize
det
1
0
0
1
Synchronized
Clock Input
2
Set TMR1IF flag bit
on Overflow
TMR1
CLR
CCP Special Event Trigger
T1OSCEN
Enable
Oscillator T1OSI (1)
T1OSO/T1CKI
T1OSC
Note 1: When enable bit T1OSCEN is cleared, the inverter and feedback resistor are turned off. This
eliminates power drain.
Fosc/4
Internal
Clock
39500 18C Reference Manual.book Page 2 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39514A-page 14-3
Section 14. Timer1
Timer1
14
Figure 14-2: Timer1 Block Diagram 16-Bit Read/Write Mode
Timer 1 TMR1L
T1SYNC
TMR1CS
T1CKPS1:T1CKPS0
SLEEP input
T1OSCEN
Enable
Oscillator (1)
TMR1IF
Overflow
Interrupt
Fosc/4
Internal
Clock
TMR1ON
on/off
Prescaler
1, 2, 4, 8
Synchronize
det
1
0
0
1
Synchronized
Clock Input
2
T13CKI/
T1OSI
TMR1
flag bit
Note 1: When enable bit T1OSCEN is cleared, the inverter and feedback resistor are turned off. This
eliminates power drain.
Data Bus<7:0>
8
TMR1H
8 8
8
Read TMR1L
Write TMR1L
T1OSO
High Byte
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14.2 Control Register
Register 14-1 shows the Timer1 Control register. This register controls the operating mode of the
Timer1 module and contains the Timer1 oscillator enable bit (T1OSCEN).
Register 14-1: T1CON: Timer1 Control Register
R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
RD16 — T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON
bit 7 bit 0
bit 7 RD16: 16-bit Read/Write Mode Enable bit
1 = Enables register Read/Write of Timer1 in one 16-bit operation
0 = Enables register Read/Write of Timer1 in two 8-bit operations
bit 6 Unimplemented: Read as '0'
bit 5:4 T1CKPS1:T1CKPS0: Timer1 Input Clock Prescale Select bits
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
bit 3 T1OSCEN: Timer1 Oscillator Enable bit
1 = Timer1 Oscillator is enabled
0 = Timer1 Oscillator is shut off. The oscillator inverter and feedback resistor are turned off to
eliminate power drain.
bit 2 T1SYNC: Timer1 External Clock Input Synchronization Select bit
When TMR1CS = 1:
1 = Do not synchronize external clock input
0 = Synchronize external clock input
When TMR1CS = 0:
This bit is ignored. Timer1 uses the internal clock when TMR1CS = 0.
bit 1 TMR1CS: Timer1 Clock Source Select bit
1 = External clock from pin T1OSO/T13CKI (on the rising edge)
0 = Internal clock (FOSC/4)
bit 0 TMR1ON: Timer1 On bit
1 = Enables Timer1
0 = Stops Timer1
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 14. Timer1
Timer1
14
14.3 Timer1 Operation in Timer Mode
Timer mode is selected by clearing the TMR1CS (T1CON register) bit. In this mode, the input
clock to the timer is FOSC/4. The synchronize control bit, T1SYNC (T1CON register), has no
effect since the internal clock is always synchronized.
14.4 Timer1 Operation in Synchronized Counter Mode
Counter mode is selected by setting the TMR1CS bit. In this mode, the timer increments on every
rising edge of clock input on the T1OSI pin when the Timer1 oscillator enable bit (T1OSCEN) is
set, or the T1OSO/T13CKI pin when the T1OSCEN bit is cleared.
If the T1SYNC bit is cleared, then the external clock input is synchronized with internal phase
clocks. The synchronization is done after the prescaler stage. The prescaler operates asynchronously.
The timer increments at the Q4:Q1 edge.
In this configuration, during SLEEP mode, Timer1 will not increment even if the external clock is
present, since the synchronization circuit is shut off. The prescaler however will continue to increment.
14.4.1 External Clock Input Timing for Synchronized Counter Mode
When an external clock input is used for Timer1 in synchronized counter mode, it must meet certain
requirements. The external clock requirement is due to internal phase clock (TSCLK) synchronization.
Also, there is a delay in the actual incrementing of TMR1 after synchronization.
When the prescaler is 1:1, the external clock input is the same as the prescaler output. The synchronization
of T1CKI with the internal phase clocks is accomplished by sampling the prescaler
output on alternating TscLK clocks of the internal phase clocks. Therefore, it is necessary for the
T1CKI pin to be high for at least 2TscLK (and a small RC delay) and low for at least 2TscLK (and
a small RC delay). Refer to parameters 45, 46, and 47 in the “Electrical Specifications” section.
When a prescaler other than 1:1 is used, the external clock input is divided by the asynchronous
prescaler so that the prescaler output is symmetrical. In order for the external clock to meet the
sampling requirement, the prescaler counter must be taken into account. Therefore, it is necessary
for the T1CKI pin to have a period of at least 4TscLK (and a small RC delay) divided by the
prescaler value. Another requirement on the T1CKI pin high and low time is that they do not violate
the minimum pulse width requirements). Refer to parameters 40, 42, 45, 46, and 47 in the
“Electrical Specifications” section.
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14.5 Timer1 Operation in Asynchronous Counter Mode
If T1SYNC (T1CON register) is set, the external clock input is not synchronized. The timer continues
to increment asynchronously to the internal phase clocks. The timer will continue to run
during SLEEP and can generate an interrupt on overflow that will wake-up the processor. However,
special precautions in software are needed to read/write the timer (Subsection
14.6.4 “Reading and Writing Timer1 in Asynchronous Counter Mode with RD16 = 0” ).
Since the counter can operate in sleep, Timer1 can be used to implement a true real-time clock.
The timer increments at the Q4:Q1 and Q2:Q3 edges.
In asynchronous counter mode, Timer1 cannot be used as a time-base for capture or compare
operations.
14.5.1 External Clock Input Timing with Unsynchronized Clock
If the T1SYNC control bit is set, the timer will increment completely asynchronously. The input
clock must meet certain minimum high time and low time requirements. Refer to the Device Data
Sheet “Electrical Specifications” section, timing parameters 45, 46, and 47.
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Section 14. Timer1
Timer1
14
14.6 Reading and Writing of Timer1
Timer1 has modes that allow the 16-bit timer register to be read/written as two 8-bit registers or
one 16-bit register. The mode depends on the state of the RD16 bit. The following subsections
discuss this operation.
14.6.1 Timer1 and 16-bit Read/Write Modes
Timer1 can be configured for 16-bit reads and writes. When the RD16 control bit (T1CON register)
is set, the address for TMR1H is mapped to a buffer register for the high byte of Timer1. A
read from TMR1L will load the contents of the high byte of Timer1 into the Timer1 high byte buffer.
This provides the user with the ability to accurately read all 16 bits of Timer1 without having to
determine whether a read of the high byte followed by a read of the low byte is valid due to a
rollover between reads.
14.6.2 16-bit Mode Timer Write
A write to the high byte of Timer1 must also take place through the TMR1H buffer register. Timer1
high byte is updated with the contents of TMR1H when a write occurs to TMR1L. This allows a
user to write all 16 bits to both the high and low bytes of Timer1 at once (See Figure 14-3).
The high byte of Timer1 is not directly readable or writable in this mode. All reads and writes must
take place through the Timer1 high byte buffer register.
Writes to TMR1H do not clear the Timer1 prescaler. The prescaler is only cleared on writes to
TMR1L.
14.6.3 16-bit Read-Modify-Write
Read-modify-write instructions like BSF or BCF will read the contents of a register, make the
appropriate changes, and place the result back into the register. In the case of Timer1 when
configured in 16-bit mode, the read portion of a read-modify-write instruction of TMR1L will not
update the contents of the TMR1H buffer. The TMR1H buffer will remain unchanged. When the
write of TMR1L portion of the instruction takes place, the contents of TMR1H will be placed into
the high byte of Timer1.
Figure 14-3: Timer1 Block Diagram When Configured in 16-bit Read/Write Mode
Timer 1 TMR1L
T1SYNC
TMR1CS
T1CKPS1:T1CKPS0
SLEEP input
TMR1IF
Overflow
Interrupt
FOSC/4
Internal
Clock
TMR1ON
on/off
Prescaler
1, 2, 4, 8
Synchronize
det
1
0
0
1
Synchronized
Clock Input
2
TMR1
flag bit high byte
Data Bus<7:0>
8
TMR1H
8 8
8
Read TMR1L
Write TMR1L
T1OSC
T1OSCEN
Enable
Oscillator (1)
T13CKI/
T1OSO TTIP
Note 1: When enable bit T1OSCEN is cleared, the inverter and feedback resistor are turned off. This
eliminates power drain.
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14.6.4 Reading and Writing Timer1 in Asynchronous Counter Mode with RD16 = 0
Reading TMR1H or TMR1L while the timer is running from an external asynchronous clock will
ensure a valid read (taken care of in hardware). However, the user should keep in mind that reading
the 16-bit timer in two 8-bit values itself poses certain problems, since the timer may overflow
between the reads.
For writes, it is recommended that the user simply stop the timer and write the desired values. A
write contention may occur by writing to the timer registers while the register is incrementing. This
may produce an unpredictable value in the timer register.
Reading the 16-bit value requires some care, since two separate reads are required to read the
entire 16-bits. Example 14-1 shows why this may not be a straight forward read of the 16-bit register.
Example 14-1: Reading 16-bit Register Issues
TMR1
Sequence 1 Sequence 2
Action TMPH:TMPL Action TMPH:TMPL
04FFh READ TMR1L xxxxh READ TMR1H xxxxh
0500h Store in TMPL xxFFh Store in TMPH 04xxh
0501h READ TMR1H xxFFh READ TMR1L 04xxh
0502h Store in TMPH 05FFh Store in TMPL 0401h
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Section 14. Timer1
Timer1
14
Example 14-2 shows a routine to read the 16-bit timer value without experiencing the issues
shown in Example 14-1. This is useful if the timer cannot be stopped.
Example 14-2: Reading a 16-bit Free-Running Timer
Writing a 16-bit value to the 16-bit TMR1 register is straightforward. First the TMR1L register is
cleared to ensure that there are many Timer1 clock/oscillator cycles before there is a rollover into
the TMR1H register. The TMR1H register is then loaded, and finally the TMR1L register is
loaded. Example 14-3 shows a routine that does a 16-bit write to a Free Running Timer.
Example 14-3: Writing a 16-bit Free Running Timer
; All interrupts are disabled
MOVF TMR1H, W ; Read high byte
MOVWF TMPH ;
MOVF TMR1L, W ; Read low byte
MOVWF TMPL ;
MOVF TMR1H, W ; Read high byte
SUBWF TMPH, W ; Sub 1st read with 2nd read
BTFSC STATUS,Z ; Is result = 0
GOTO CONTINUE ; Good 16-bit read
;
; TMR1L may have rolled over between the read of the high and low bytes.
; Reading the high and low bytes now will read a good value.
;
MOVF TMR1H, W ; Read high byte
MOVWF TMPH ;
MOVF TMR1L, W ; Read low byte
MOVWF TMPL ;
; Re-enable the Interrupt (if required)
CONTINUE ; Continue with your code
; All interrupts are disabled
CLRF TMR1L ; Clear Low byte, Ensures no
; rollover into TMR1H
MOVLW HI_BYTE ; Value to load into TMR1H
MOVWF TMR1H, F ; Write High byte
MOVLW LO_BYTE ; Value to load into TMR1L
MOVWF TMR1H, F ; Write Low byte
; Re-enable the Interrupt (if required)
CONTINUE ; Continue with your code
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14.7 Timer1 Oscillator
An alternate crystal oscillator circuit is built into the device. The output of this oscillator can be
selected as the input into Timer1. The Timer1 oscillator is primarily intended to operate as a timebase
for the timer modules; therefore, the oscillator is primarily intended for a 32 kHz crystal,
which is an ideal frequency for real-time keeping. In real-time applications, the timer needs to
increment during SLEEP, so SLEEP does not disable the Timer1 oscillator. For many applications,
power consumption is also an issue, so the oscillator is designed to minimize power consumption.
The Timer1 oscillator is enabled by setting the T1OSCEN control bit (T1CON register). After the
Timer1 oscillator is enabled, the user must provide a software time delay to ensure proper oscillator
start-up.
Table 14-1 shows the capacitor selection for the Timer1 oscillator.
Table 14-1: Capacitor Selection for the Timer1 Oscillator
Note: The Timer1 oscillator allows the counter to operate (increment) when the device is
in sleep mode. This allows Timer1 to be used as a real-time clock.
Osc Type Freq C1 C2
LP 32 kHz 33 pF 33 pF
100 kHz 15 pF 15 pF
200 kHz 15 pF 15 pF
Crystals Tested:
32.768 kHz Epson C-001R32.768K-A ± 20 PPM
100 kHz Epson C-2 100.00 KC-P ± 20 PPM
200 kHz STD XTL 200.000 kHz ± 20 PPM
Note 1: Higher capacitance increases the stability of oscillator but also increases the start-up
time.
2: Since each resonator/crystal has its own characteristics, the user should consult the
resonator/crystal manufacturer for appropriate values of external components.
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Section 14. Timer1
Timer1
14
14.8 Typical Application
In Figure 14-4 an example application is given, where Timer1 is driven from an external 32 kHz
oscillator. The external 32 kHz oscillator is typically used in applications where real-time needs
to be kept, but it is also desirable to have the lowest possible power consumption. The Timer1
oscillator allows the device to be placed in sleep while the timer continues to increment. When
Timer1 overflows, the interrupt wakes up the device so that the appropriate registers can be
updated.
Figure 14-4: Timer1 Application
In this example, a 32 kHz crystal is used as the time base for the Real Time Clock. If the clock
needs to be updated at 1 second intervals, then the Timer1 must be loaded with a value to allow
the Timer1 to overflow at the desired rate. In the case of a 1 second Timer1 overflow, the TMR1H
register should be loaded with a value of 80k after each overflow.
8
4
4
4
4x4
Keypad
Current Sink
TMR1
VSS
VDD
32 kHz
Backup
Battery
Power-Down
Detect
T1OSI
T1OSO
OSC1
TT1P
Note: The TMR1L register should never be modified, since an external clock is asychronous
to the system clock. Writes to the TRM1L register may corrupt the real time
counter value causing inaccuracies.
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14.9 Sleep Operation
When Timer1 is configured for asynchronous operation, the TMR1 registers will continue to
increment for each timer clock (or prescale multiple of clocks). When the TMR1 register overflows,
the TMR1IF bit will get set. If enabled, this will generate an interrupt that will wake the processor
from sleep mode.
The Timer1 oscillator will add a delta current, due to the operation of this circuitry. That is, the
power-down current will no longer only be the leakage current of the device, but also the active
current of the Timer1 oscillator and other circuitry.
14.10 Resetting Timer1 Using a CCP Trigger Output
If a CCP module is configured in compare mode to generate a “Special Event Trigger”
(CCP1M3:CCP1M0 = 1011), this signal resets Timer1.
Timer1 must be configured for either timer or synchronized counter mode to take advantage of
the special event trigger feature. If Timer1 is running in asynchronous counter mode, this reset
operation may not work and should not be used.
In the event that a write to Timer1 coincides with a special event trigger from the CCP module,
the write will take precedence.
In this mode of operation, the CCPRxH:CCPRxL register pair effectively becomes the period register
for Timer1.
14.10.1 CCP Trigger and A/D Module
Some devices that have the CCP Trigger capability also have an A/D module. These devices
may be able to be configured, so the “Special Event Trigger” not only resets the Timer1 registers,
0but will start an A/D conversion. This allows a constant sampling rate for the A/D, as specified
by the value of the compare registers.
Note: The special event trigger from the CCP module does not set interrupt flag bit
TMR1IF.
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Section 14. Timer1
Timer1
14
14.11 Resetting Timer1 Register Pair (TMR1H:TMR1L)
TMR1H and TMR1L registers are not cleared on any reset, only by the CCP special event triggers.
T1CON register is reset to 00h on a Power-on Reset or a Brown-out Reset. In any other reset,
the register is unaffected.
Timer1 is the default time base for the CCP1 and CCP2 modules. The timer can be disabled as
the time base for either CCP1, CCP2, or both, and Timer3 can be substituted. This is achieved
by setting control bits in the Timer3 control register.
This is explained in Section 16.8 - Timer3 and CCPx Enable.
When Timer1 is disabled as a the time base for a CCP, the reset on Compare will have no effect
on Timer1.
14.12 Timer1 Prescaler
The prescaler counter is cleared on writes to the TMR1H or TMR1L registers.
14.12.1 Timer1 Prescaler 16-bit Read/WriteMode
Writes to TMR1H do not clear the Timer1 prescaler in 16-bit read/write mode, because a write
to TMR1H only modifies the Timer1 latch and does not change the contents of Timer1. The
prescaler is only cleared on writes to TMR1L.
Table 14-2: Registers Associated with Timer1 as a Timer/Counter
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on
all other
resets
INTCON GIE PEIE T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000u
PIR TMR1IE (1) 0 0
PIE TMR1IE (1) 0 0
IPR TMR1IP (1) 0 0
TMR1L Holding register for the Least Significant Byte of the 16-bit TMR1 register xxxx xxxx uuuu uuuu
TMR1H Holding register for the Most Significant Byte of the 16-bit TMR1 register xxxx xxxx uuuu uuuu
T1CON RD16 — T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON --00 0000 --uu uuuu
Legend: x = unknown,u = unchanged,- = unimplemented read as '0'.
Shaded cells are not used by the Timer1 module.
Note 1: The placement of this bit is device dependent.
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14.13 Initialization
Since Timer1 has a software programmable clock source, there are three examples to show the
initialization of each mode. Example 14-4 shows the initialization for the internal clock source,
Example 14-5 shows the initialization for the external clock source, and Example 14-6 shows the
initialization of the external oscillator mode.
Example 14-4: Timer1 Initialization (Internal Clock Source)
Example 14-5: Timer1 Initialization (External Clock Source)
CLRF T1CON ; Stop Timer1, Internal Clock Source,
; T1 oscillator disabled,
; prescaler = 1:1
CLRF TMR1H ; Clear Timer1 High byte register
CLRF TMR1L ; Clear Timer1 Low byte register
CLRF INTCON ; Disable interrupts
CLRF PIE1 ; Disable peripheral interrupts
CLRF PIR1 ; Clear peripheral interrupts Flags
MOVLW 0x30 ; Internal Clock source
; with 1:8 prescaler
MOVWF T1CON ; Timer1 is stopped and
; T1 osc is disabled
BSF T1CON, TMR1ON ; Timer1 starts to increment
;
; The Timer1 interrupt is disabled, do polling on the overflow bit
;
T1_OVFL_WAIT
BTFSS PIR1, TMR1IF
GOTO T1_OVFL_WAIT
;
; Timer has overflowed
;
BCF PIR1, TMR1IF
CLRF T1CON ; Stop Timer1, Internal Clock Source,
; T1 oscillator disabled,
; prescaler = 1:1
CLRF TMR1H ; Clear Timer1 High byte register
CLRF TMR1L ; Clear Timer1 Low byte register
CLRF INTCON ; Disable interrupts
CLRF PIE1 ; Disable peripheral interrupts
CLRF PIR1 ; Clear peripheral interrupts Flags
MOVLW 0x32 ; External Clock source
; with 1:8 prescaler
MOVWF T1CON ; Clock source is
; synchronized to device
; Timer1 is stopped
; and T1 osc is disabled
BSF T1CON, TMR1ON ; Timer1 starts to increment
;
; The Timer1 interrupt is disabled, do polling on the overflow bit
;
T1_OVFL_WAIT
BTFSS PIR1, TMR1IF
GOTO T1_OVFL_WAIT
;
; Timer has overflowed
;
BCF PIR1, TMR1IF
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2000 Microchip Technology Inc. DS39514A-page 14-15
Section 14. Timer1
Timer1
14
Example 14-6: Timer1 Initialization (External Oscillator Clock Source)
CLRF T1CON ; Stop Timer1, Internal Clock Source,
; T1 oscillator disabled,
; prescaler = 1:1
CLRF TMR1H ; Clear Timer1 High byte register
CLRF TMR1L ; Clear Timer1 Low byte register
CLRF INTCON ; Disable interrupts
CLRF PIE1 ; Disable peripheral interrupts
CLRF PIR1 ; Clear peripheral interrupts Flags
MOVLW 0x3E ; External Clock source
; with oscillator
MOVWF T1CON ; circuitry, 1:8 prescaler,
; Clock source is
; asynchronous to device
; Timer1 is stopped
BSF T1CON, TMR1ON ; Timer1 starts to increment
;
; The Timer1 interrupt is disabled, do polling on the overflow bit
;
T1_OVFL_WAIT
BTFSS PIR1, TMR1IF
GOTO T1_OVFL_WAIT
;
; Timer has overflowed
;
BCF PIR1, TMR1IF
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DS39514A-page 14-16 2000 Microchip Technology Inc.
14.14 Design Tips
Question 1: Timer1 does not seem to be keeping accurate time.
Answer 1:
There are a few reasons that this could occur:
1. You should never write to Timer1 where that could cause the loss of time. In most cases,
that means you should not write to the TMR1L register, but if the conditions are OK, you
may write to the TMR1H register. Normally, you write to the TMR1H register if you want
the Timer1 overflow interrupt to be sooner than the full 16-bit time-out.
2. You should ensure that your layout uses good PCB layout techniques so noise does not
couple onto the Timer1/Timer3 oscillator lines.
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Section 14. Timer1
Timer1
14
14.15 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is they may be written for
the Baseline, the Midrange, or High-end families), but the concepts are pertinent, and could be
used (with modification and possible limitations). The current application notes related to Timer1
are:
Title Application Note #
Using Timer1 in Asynchronous Clock Mode AN580
Low Power Real Time Clock AN582
Yet another Clock using the PIC16C92X AN649
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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14.16 Revision History
Revision A
This is the initial released revision of the Timer1 module description.
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2000 Microchip Technology Inc. DS39515A-page 15-1
Timer2
15
Section 15. Timer2
HIGHLIGHTS
This section of the manual contains the following major topics:
15.1 Introduction .................................................................................................................. 15-2
15.2 Control Register ........................................................................................................... 15-3
15.3 Timer Clock Source ..................................................................................................... 15-4
15.4 Timer (TMR2) and Period (PR2) Registers.................................................................. 15-4
15.5 TMR2 Match Output..................................................................................................... 15-4
15.6 Clearing the Timer2 Prescaler and Postscaler............................................................. 15-4
15.7 Sleep Operation ........................................................................................................... 15-4
15.8 Initialization .................................................................................................................. 15-5
15.9 Design Tips .................................................................................................................. 15-6
15.10 Related Application Notes............................................................................................ 15-7
15.11 Revision History ........................................................................................................... 15-8
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15.1 Introduction
Timer2 is an 8-bit timer with a prescaler, a postscaler and a period register. Using the prescaler
and postscaler at their maximum settings, the overflow time is the same as a 16-bit timer.
Timer2 is the PWM time-base when the CCP module(s) is used in the PWM mode.
Figure 15-1 shows a block diagram of Timer2. The postscaler counts the number of times that
the TMR2 register matched the PR2 register. This can be useful in reducing the overhead of the
interrupt service routine on the CPU performance.
Figure 15-1: Timer2 Block Diagram
Comparator
TMR2 Sets flag
TMR2 reg
output (1)
Reset
Postscaler
Prescaler
PR2 reg
2
FOSC/4
1:1 1:16
1:1, 1:4, 1:16
EQ
4
bit TMR2IF
Note 1: TMR2 register output can be software selected by the SSP Module as a baud clock.
to
TOUTPS3:TOUTPS0
T2CKPS1:T2CKPS0
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Section 15. Timer2
Timer2
15
15.2 Control Register
Register 15-1 shows the Timer2 control register. The prescaler and postscaler selection of
Timer2 are controlled by this register.
Register 15-1: T2CON: Timer2 Control Register
U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0
bit 7 bit 0
bit 7 Unimplemented: Read as '0'
bit 6-3 TOUTPS3:TOUTPS0: Timer2 Output Postscale Select bits
0000 = 1:1 Postscale
0001 = 1:2 Postscale
•
•
•
1111 = 1:16 Postscale
bit 2 TMR2ON: Timer2 On bit
1 = Timer2 is on
0 = Timer2 is off
bit 1-0 T2CKPS1:T2CKPS0: Timer2 Clock Prescale Select bits
00 = Prescaler is 1
01 = Prescaler is 4
1x = Prescaler is 16
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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15.3 Timer Clock Source
The Timer2 module has one source of input clock, the device clock (FOSC/4). A prescale option
of 1:1, 1:4 or 1:16 is software selected by control bits T2CKPS1:T2CKPS0 (T2CON register).
15.4 Timer (TMR2) and Period (PR2) Registers
The TMR2 register is readable and writable, and is cleared on all device resets. Timer2 increments
from 00h until it matches PR2 and then resets to 00h on the next increment cycle. PR2 is
a readable and writable register.
The TMR2 register is cleared and the PR2 register is set when a WDT, POR, MCLR or a BOR
reset occurs.
Timer2 can be shut off (disabled from incrementing) by clearing the TMR2ON control bit (T2CON
register). This minimizes the power consumption of the module.
15.5 TMR2 Match Output
The match output of TMR2 goes to two sources:
1. Timer2 Postscaler
2. SSP Clock Input
There are 4-bits which select the postscaler. This allows the postscaler a 1:1 to 1:16 scaling
(inclusive). After the postscaler overflows, the TMR2 interrupt flag bit (TMR2IF) is set to indicate
the Timer2 overflow. This is useful in reducing the software overhead of the Timer2 interrupt service
routine, since it will only execute once every postscaler # of matches.
The match output of TMR2 is also routed to the Synchronous Serial Port module, which may
select this via software, as the clock source for the shift clock.
15.6 Clearing the Timer2 Prescaler and Postscaler
The prescaler and postscaler counters are cleared when any of the following occurs:
• a write to the TMR2 register
• a write to the T2CON register
• any device reset (Power-on Reset, MCLR reset, Watchdog Timer Reset, Brown-out Reset)
15.7 Sleep Operation
During sleep, TMR2 will not increment. The prescaler will retain the last prescale count, ready
for operation to resume after the device wakes from sleep.
Table 15-1: Registers Associated with Timer2
Note: If the PR2 register = 00h, the TMR2 register will not increment (Timer2 cleared).
Note: When T2CON is written, TMR2 does not clear.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on
all other
resets
INTCON GIE PEIE TMR0IE INTE RBIE TMR0IF INTF RBIF 0000 000x 0000 000u
PIR TMR2IF (1) 0 0
PIE TMR2IE (1) 0 0
IPR TMR21P (1) 0 0
TMR2 Timer2 module’s register 0000 0000 0000 0000
T2CON — TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000
PR2 Timer2 Period Register 1111 1111 1111 1111
Legend: x = unknown,u = unchanged,- = unimplemented read as '0'.
Shaded cells are not used by the Timer2 module.
Note 1: The position of this bit is device dependent.
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Section 15. Timer2
Timer2
15
15.8 Initialization
Example 15-1 shows how to initialize the Timer2 module, including specifying the Timer2 prescaler
and postscaler.
Example 15-1:Timer2 Initialization
CLRF T2CON ; Stop Timer2, Prescaler = 1:1,
; Postscaler = 1:1
CLRF TMR2 ; Clear Timer2 register
CLRF INTCON ; Disable interrupts
LRF PIE1 ; Disable peripheral interrupts
CLRF PIR1 ; Clear peripheral interrupts Flags
MOVLW 0x72 ; Postscaler = 1:15, Prescaler = 1:16
MOVWF T2CON ; Timer2 is off
MOVLW PR2VALUE ; This is the value
MOVWF PR2 ; to load into the PR2 register.
BSF T2CON, TMR2ON ; Timer2 starts to increment
;
; The Timer2 interrupt is disabled, do polling on the overflow bit
;
T2_OVFL_WAIT
BTFSS PIR1, TMR2IF ; Has TMR2 interrupt occurred?
GOTO T2_OVFL_WAIT ; NO, continue loop
;
; Timer has overflowed
;
BCF PIR1, TMR2IF ; YES, clear flag and continue.
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DS39515A-page 15-6 2000 Microchip Technology Inc.
15.9 Design Tips
Question 1: Timer2 never seems to increment?
Answer 1:
Ensure that the Timer2 Period register (PR2) is not 0h. This is because when a period match
occurs, the TMR2 register is cleared on the next cycle so Timer2 will never increment.
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Section 15. Timer2
Timer2
15
15.10 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is, they may be written for
the Base-Line, the Mid-Range or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to the
Timer2 Module are:
Title Application Note #
Using the CCP Module AN594
Air Flow Control using Fuzzy Logic AN600
Adaptive Differential Pulse Code Modulation using the PIC16/17 AN643
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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DS39515A-page 15-8 2000 Microchip Technology Inc.
15.11 Revision History
Revision A
This is the initial released revision of the TImer2 module description.
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2000 Microchip Technology Inc. DS39516A-page 16-1
Timer3
16
Section 16. Timer3
HIGHLIGHTS
This section of the manual contains the following major topics:
16.1 Introduction .................................................................................................................. 16-2
16.2 Control Registers ......................................................................................................... 16-3
16.3 Timer3 Operation in Timer Mode ................................................................................. 16-4
16.4 Timer3 Operation in Synchronized Counter Mode....................................................... 16-4
16.5 Timer3 Operation in Asynchronous Counter Mode...................................................... 16-5
16.6 Reading and Writing of Timer3 .................................................................................... 16-6
16.7 Timer3 using the Timer1 Oscillator .............................................................................. 16-9
16.8 Timer3 and CCPx Enable .......................................................................................... 16-10
16.9 Timer3 Prescaler........................................................................................................ 16-10
16.10 16-bit Mode Timer Reads/Writes ............................................................................... 16-11
16.11 Typical Application ..................................................................................................... 16-12
16.12 Sleep Operation ......................................................................................................... 16-13
16.13 Timer3 Prescaler........................................................................................................ 16-13
16.14 Initialization ................................................................................................................ 16-14
16.15 Design Tips ................................................................................................................ 16-16
16.16 Related Application Notes.......................................................................................... 16-17
16.17 Revision History ......................................................................................................... 16-18
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16.1 Introduction
The Timer3 module is a 16-bit timer/counter consisting of two 8-bit registers (TMR3H and
TMR3L) that are readable and writable. The TMR3 register pair (TMR3H:TMR3L) increments
from 0000h to FFFFh and rolls over to 0000h. The Timer3 Interrupt, if enabled, is generated on
overflow, which is latched in the TMR3IF interrupt flag bit. This interrupt can be enabled/disabled
by setting/clearing the TMR3IE interrupt enable bit.
Timer3 can operate in one of three modes:
• As a synchronous timer
• As a synchronous counter
• As an asynchronous counter
Some features of Timer3 include:
• TMR3 also has an internal “reset input”, which can be generated by a CCP module.
• TMR3 has the capability to operate off an external crystal/clock.
• TMR3 is the alternate time base for capture/compare
In timer mode, Timer3 increments every instruction cycle. In counter mode, it increments on
every rising edge of the external clock input.
The Timer3 increment can be enabled/disabled by setting/clearing control bit TMR3ON (T3CON
register).
Timer3 also has an internal “reset input”. This reset can be generated by a CCP special event
trigger (Capture/Compare/PWM) module. See the CCP (Capture/Compare/PWM) section for
details.
When the Timer1 oscillator is enabled (T1OSCEN, in T1CON, is set), the T1OSCI1 and T1OSO2
pins are configured as oscillator input and output, so the corresponding values in the TRIS register
are ignored.
The Timer3 module also has a software programmable prescaler.
The operating mode is determined by clock select bit, TMR3CS (T3CON register), and the synchronization
bit, T3SYNC (Figure 16-1).
Figure 16-1: Timer3 Block Diagram
TMR3H TMR3L
T3SYNC
TMR3CS
T3CKPS1:T3CKPS0 SLEEP input
FOSC/4
Internal
Clock
TMR3ON
on/off
Prescaler
1, 2, 4, 8
Synchronize
det
1
0
0
1
Synchronized
Clock Input
2
Set TMR3IF flag bit
on Overflow
TMR3
CLR
TT1P
CCP Special Trigger
T3CCPx
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2000 Microchip Technology Inc. DS39516A-page 16-3
Section 16. Timer3
Timer3
16
16.2 Control Registers
Register 16-1 shows the Timer3 control register. This register controls the operating mode of the
Timer3 module and contains the function of the CCP Special Event Trigger.
Register 16-1: T3CON: Timer3 Control Register
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
RD16 T3CCP2 T3CKPS1 T3CKPS0 T3CCP1 T3SYNC TMR3CS TMR3ON
bit 7 bit 0
bit 7 RD16: 16-bit Read/Write Mode Enable
1 = Enables register Read/Write of Timer3 in one 16-bit operation
0 = Enables register Read/Write of Timer3 in two 8-bit operations
bit 6,3 T3CCP2:T3CCP1: Timer3 and Timer1 to CCPx Enable bits
1x = Timer3 is the clock source for compare/capture of the CCP modules
01 = Timer3 is the clock source for compare/capture of CCP2,
Timer1 is the clock source for compare/capture of CCP1
00 = Timer1 is the clock source for compare/capture of the CCP modules
bit 5:4 T3CKPS1:T3CKPS0: Timer3 Input Clock Prescale Select bits
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
bit 2 T3SYNC: Timer3 External Clock Input Synchronization Control bit
(Not usable if the system clock comes from Timer1/Timer3)
When TMR3CS = 1:
1 = Do not synchronize external clock input
0 = Synchronize external clock input
When TMR3CS = 0:
This bit is ignored. Timer3 uses the internal clock when TMR3CS = 0.
bit 1 TMR3CS: Timer3 Clock Source Select bit
1 = External clock input from T1OSI or T1CKI (on the rising edge after the first falling edge)
0 = Internal clock (FOSC/4)
bit 0 TMR3ON: Timer3 On bit
1 = Enables Timer3
0 = Stops Timer3
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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16.3 Timer3 Operation in Timer Mode
Timer mode is selected by clearing the TMR3CS (T3CON register) bit. In this mode, the input
clock to the timer is FOSC/4. The synchronize control bit, T3SYNC (T3CON register), has no
effect since the internal clock is always synchronized.
16.4 Timer3 Operation in Synchronized Counter Mode
Counter mode is selected by setting bit TMR3CS. In this mode, the timer increments on every
rising edge of input on the T1OSI pin (when enable bit T1OSCEN is set) or the T13CKI pin (when
bit T1OSCEN is cleared).
If the T3SYNC bit is cleared, then the external clock input is synchronized with internal phase
clocks. The synchronization is done after the prescaler stage. The prescaler operates asynchronously.
The timer increments at the Q4:Q1 edge.
In this configuration, during SLEEP mode, Timer3 will not increment even if an external clock is
present, since the synchronization circuit is shut off. The prescaler, however, will continue to
increment.
16.4.1 External Clock Input Timing for Synchronized Counter Mode
When an external clock input is used for Timer3 in synchronized counter mode, it must meet certain
requirements. The external clock requirement is due to internal phase clock (TSCLK) synchronization.
Also, there is a delay in the actual incrementing of TMR3 after synchronization.
When the prescaler is 1:1, the external clock input is the same as the prescaler output. There is
synchronization of T1OSI/T13CKI with the internal phase clocks. Therefore, it is necessary for
(T1OSI/T13CKI to be high for at least 2TSCLK (and a small RC delay) and low for at least 2TSCLK
(and a small RC relay). Refer to parameters 45, 46, and 47 in the “Electrical Specifications”
section.
When a prescaler other than 1:1 is used, the external clock input is divided by the asynchronous
prescaler, so that the prescaler output is symmetrical. In order for the external clock to meet the
sampling requirement, the prescaler counter must be taken into account. Therefore, it is necessary
for T1OSI/T1CKI to have a period of at least 4TSCLK (and a small RC delay) divided by the
prescaler value. The only requirement on T1OSI/T1CKI high and low time is that they do not violate
the minimum pulse width requirements. Refer to parameters 40, 42, 45, 46, and 47 in the
“Electrical Specifications” section.
Note: Timer3 gets its external clock input from the same source as Timer1. The configuration
of the Timer1 and Timer3 clock input will be controlled by the T1OSCEN bit
in the Timer1 control register.
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Section 16. Timer3
Timer3
16
16.5 Timer3 Operation in Asynchronous Counter Mode
If T3SYNC (T3CON register) is set, the external clock input is not synchronized. The timer continues
to increment asynchronously to the internal phase clocks. The timer will continue to run
during SLEEP and can generate an interrupt on overflow that will wake-up the processor. However,
special precautions in software are needed to read/write the timer (Subsection
16.6.4 “Reading and Writing Timer3 in Asynchronous Counter Mode with RD16 = 0” ).
Since the counter can operate in sleep, Timer1 can be used to implement a true real-time clock.
The timer increments at the Q4:Q1 and Q2:Q3 edges.
In asynchronous counter mode, Timer3 cannot be used as a time-base for capture or compare
operations.
16.5.1 External Clock Input Timing with Unsynchronized Clock
If the T3SYNC control bit is set, the timer will increment completely asynchronously. The input
clock must meet certain minimum high time and low time requirements. Refer to the Device Data
Sheet “Electrical Specifications” section, timing parameters 45, 46, and 47.
Note: The control bit T3SYNC is not usable when the system clock source comes from the
same source as the Timer1/Timer3 clock input, because the T1CKI input will be
sampled at one quarter the frequency of the incoming clock.
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16.6 Reading and Writing of Timer3
Timer3 has modes that allow the 16-bit timer register to be read/written as two 8-bit registers or
one 16-bit register. The mode depends on the state of the RD16 bit. The follow subsections discuss
this operation.
16.6.1 Timer3 and 16-bit Read/Write Modes
Timer3 can be configured for 16-bit reads. When the RD16 control bit (T3CON register) is set,
the address for TMR3H is mapped to a buffer register for the high byte of Timer3. A read from
TMR3L will load the contents of the high byte of Timer3 into the Timer3 high byte buffer. This provides
the user with the ability to accurately read all 16-bits of Timer3 without having to determine
whether a read of the high byte followed by a read of the low byte is valid due to a rollover
between reads.
16.6.2 16-bit Mode Timer Write
A write to the high byte of Timer3 must also take place through the TMR3H buffer register. Timer3
high byte is updated with the contents of TMR3H when a write occurs to TMR3L. This allows a
user to write all 16 bits to both the high and low bytes of Timer3 at once (See Figure 16-2).
The high byte of Timer3 is not directly readable or writable in this mode. All reads and writes must
take place through the Timer3 high byte buffer register.
Writes to TMR3H do not clear the Timer3 prescaler. The prescaler is only cleared on writes to
TMR3L.
16.6.3 16-bit Read-Modify-Write
Read-modify-write instructions like BSF or BCF will read the contents of a register, make the
appropriate changes, and place the result back into the register. In the case of Timer3 when
configured in 16-bit mode, the read portion of a read-modify-write instruction of TMR3L will not
update the contents of the TMR3H buffer. The TMR3H buffer will remain unchanged. When the
write of TMR3L portion of the instruction takes place, the contents of TMR3H will be placed into
the high byte of Timer3.
Figure 16-2: Timer3 Block Diagram When Configured in 16-bit Read/Write Mode
Timer 3 TMR3L
T1SYNC
TMR3CS
T3CKPS1:T3CKPS0
SLEEP input
TMR3IF
Overflow
Interrupt
FOSC/4
Internal
Clock
TMR3ON
on/off
Prescaler
1, 2, 4, 8
Synchronize
det
1
0
0
1
Synchronized
Clock Input
2
TMR1
flag bit high byte
Data Bus<7:0>
8
TMR3H
8 8
8
Read TMR3L
Write TMR3L
TT1P
CCP Special Trigger
T3CCPx
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Section 16. Timer3
Timer3
16
16.6.4 Reading and Writing Timer3 in Asynchronous Counter Mode with RD16 = 0
Reading TMR3H or TMR3L while the timer is running from an external asynchronous clock will
ensure a valid read (taken care of in hardware). However, the user should keep in mind that reading
the 16-bit timer in two 8-bit values poses certain problems, since the timer may overflow
between the reads.
For writes, it is recommended that the user simply stop the timer and write the desired values. A
write contention may occur by writing to the timer registers, while the register is incrementing.
This may produce an unpredictable value in the timer register.
Reading the 16-bit value requires some care, since two separate reads are required to read the
entire 16-bits. Example 16-1 shows why this may not be a straightforward read of the 16-bit register.
Example 16-1:Reading 16-bit Register Issues
TMR3
Sequence 1 Sequence 2
Action TMPH:TMPL Action TMPH:TMPL
04FFh READ TMR3L xxxxh READ TMR3H xxxxh
0500h Store in TMPL xxFFh Store in TMPH 04xxh
0501h READ TMR3H xxFFh READ TMR3L 04xxh
0502h Store in TMPH 05FFh Store in TMPL 0401h
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Example 16-2 shows a routine to read the 16-bit timer value without experiencing the issues
shown in Example 16-1. This is useful if the timer cannot be stopped.
Example 16-2:Reading a 16-bit Free-Running Timer
Writing a 16-bit value to the 16-bit TMR3 register is straight forward. First the TMR3L register is
cleared to ensure that there are many Timer3 clock/oscillator cycles before there is a rollover into
the TMR3H register. The TMR3H register is then loaded, and finally, the TMR3L register is
loaded. Example 16-3 shows a routine that accomplishes this:
Example 16-3:Writing a 16-bit Free Running Timer
; All interrupts are disabled
MOVF TMR3H, W ; Read high byte
MOVWF TMPH ;
MOVF TMR3L, W ; Read low byte
MOVWF TMPL ;
MOVF TMR3H, W ; Read high byte
SUBWF TMPH, W ; Sub 1st read with 2nd read
BTFSC STATUS,Z ; Is result = 0
GOTO CONTINUE ; Good 16-bit read
;
; TMR3L may have rolled over between the read of the high and low bytes.
; Reading the high and low bytes now will read a good value.
;
MOVF TMR3H, W ; Read high byte
MOVWF TMPH ;
MOVF TMR3L, W ; Read low byte
MOVWF TMPL ;
; Re-enable the Interrupt (if required)
CONTINUE ; Continue with your code
; All interrupts are disabled
CLRF TMR3L ; Clear Low byte, Ensures no
; rollover into TMR3H
MOVLW HI_BYTE ; Value to load into TMR3H
MOVWF TMR3H, F ; Write High byte
MOVLW LO_BYTE ; Value to load into TMR3L
MOVWF TMR3H, F ; Write Low byte
; Re-enable the Interrupt (if required)
CONTINUE ; Continue with your code
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Section 16. Timer3
Timer3
16
16.7 Timer3 using the Timer1 Oscillator
An alternate crystal oscillator circuit is built into the device. The output of this oscillator can be
selected as the input into Timer3. The Timer1 oscillator is primarily intended to operate as a timebase
for the timer modules; therefore, the oscillator is primarily intended for a 32 kHz crystal,
which is an ideal frequency for real-time keeping. In real-time applications, the timer needs to
increment during SLEEP, so SLEEP does not disable the Timer1 oscillator. For many applications,
power consumption is also an issue, so the oscillator is designed to minimize consumption.
The Timer1 oscillator is enabled by setting the T1OSCEN control bit (T1CON register). After the
Timer1 oscillator is enabled, the user must provide a software time delay to ensure proper oscillator
start-up.
Table 16-1 shows the capacitor selection for the Timer1 oscillator.
Table 16-1: Capacitor Selection for the Timer1 oscillator
Note: The Timer1 oscillator allows the counter to operate (increment) when the device is
in sleep mode. This allows Timer1 to be used as a real-time clock.
Osc Type Freq C1 C2
LP 32 kHz 33 pF 33 pF
100 kHz 15 pF 15 pF
200 kHz 15 pF 15 pF
Crystals Tested:
32.768 kHz Epson C-001R32.768K-A ± 20 PPM
100 kHz Epson C-2 100.00 KC-P ± 20 PPM
200 kHz STD XTL 200.000 kHz ± 20 PPM
Note 1: Higher capacitance increases the stability of oscillator, but also increases the start-up
time.
2: Since each resonator/crystal has its own characteristics, the user should consult the
resonator/crystal manufacturer for appropriate values of external components.
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DS39516A-page 16-10 2000 Microchip Technology Inc.
16.8 Timer3 and CCPx Enable
Timer3 can be configured as the time base for capture and compare for either CCP2 or both
CCP1 and CCP2. Timer3 cannot be used as the time base for CCP1 only. Timer1 can be used
as the time base for CCP1 or both CCP1 and CCP2, but not CCP2 only. Control for the assignment
of each of the time bases is given by configuring the corresponding T3CCP2 and T3CCP1
bits in the Timer3 control register, and is described in Table 16-2.
Table 16-2: T3CCPx, TMR1, and TMR3
After reset, Timer1 defaults as the time base for compare and capture for both CCP’s.
16.8.1 Resetting Timer3 Using a CCP Trigger Output
If the T3CCP2 or T3CCP1 bit is set and CCP1 or CCP2 is configured in Compare mode to generate
a “Special Event Trigger” (CCPxM3:CCPxM0 = 1011), this signal will reset Timer3.
Timer3 must be configured for either timer or synchronized counter mode to take advantage of
this feature. If Timer3 is running in asynchronous counter mode, this reset operation may not
work.
In the event that a write to Timer3 coincides with a special event trigger from a CCP module, the
write will take precedence.
In this mode of operation, the CCPRxH:CCPRxL register pair effectively becomes the period register
for the Timer3 module.
16.8.2 Resetting of TMR3 Register Pair (TMR3H:TMR3L)
TMR3H and TMR3L registers are not cleared on any reset, only by the CCP special event triggers.
T1CON register is reset to 00h on a Power-on Reset or a Brown-out Reset. In any other reset,
the register is unaffected.
Timer3 is the default time base for the CCP1 and CCP2 modules. The timer can be disabled as
the time base for either CCP1, CCP2, or both, and Timer3 can be substituted. This is achieved
by setting control bits in the Timer3 control register.
This is explained in Section 16.8 - Timer3 and CCPx Enable.
When Timer3 is disabled as a the time base for a CCP, the reset on compare for that particular
CCP will have no effect on Timer3.
16.9 Timer3 Prescaler
The prescaler counter is cleared on writes to the TMR3H or TMR3L registers.
16.9.1 Timer3 Prescaler 16-bit Read/Write Mode
Writes to TMR3H do not clear the Timer3 prescaler in 16-bit read/write mode, because a write
to TMR3H only modifies the Timer3 latch and does not change the contents of Timer3. The
prescaler is only cleared on writes to TMR3L.
T3CCP2:T3CCP1 Time base for CCP1 Time base for CCP2
00 TMR1 TMR1
01 TMR1 TMR3
10 TMR3 TMR3
11 TMR3 TMR3
Note: The “Special Event Trigger” from the CCP1 and CCP2 modules will not set interrupt
flag bit TMR3IF.
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Section 16. Timer3
Timer3
16
16.10 16-bit Mode Timer Reads/Writes
Timer3 has modes that allow the 16-bit time register to be read as two 8-bit registers or one
16-bit register depending on the state of the RD16 bit.
When the RD16 control bit is set, the address for TMR3H is mapped to a buffer register for the
high byte of Timer3. A read from TMR3L will load the contents of the high byte of Timer3 into the
Timer3 high byte buffer. This provides the user with the ability to accurately read all 16 bits of
Timer3 without having to determine whether a read of the high byte followed by a read of the
low byte is valid due to a rollover between reads.
16.10.1 16-bit Mode Timer Write
A write to the high byte of Timer3 must also take place through the TMR3H buffer register. Timer3
high byte is updated with the contents of TMR3H when a write occurs to TMR3L. This allows a
user to write all 16 bits to both the high and low bytes of Timer3 at once (See Figure 16-3).
The high byte of Timer3 is not directly readable or writable in this mode. All reads and writes must
take place through the Timer3 high byte buffer register.
16.10.2 16-bit Read/Modify Write
Read modify write instructions like BSF or BCF will read the contents of a register, make the
appropriate changes, and place the result back into the register. In the case of Timer3 when configured
in 16-bit Read/Write mode, the read portion of a read-modify-write instruction of TMR3L
will not update the contents of the TMR3H buffer. The TMR3H buffer will remain unchanged.
When the write of TMR3L portion of the instruction takes place, the contents of TMR3H will be
placed into the high byte of Timer3.
Figure 16-3: Timer3 Block Diagram Configured in 16-bit Read/Write Mode
Timer3
TMR3L
T3SYNC
TMR3CS
T3CKPS1:T3CKPS0
SLEEP input
FOSC/4
Internal
Clock
TMR3ON
on/off
Prescaler
1, 2, 4, 8
Synchronize
det
1
0
0
1
Synchronized
Clock Input
2
TMR3
CLR
CCP Special Event Trigger
T3CCPx
To Timer1 Clock Input
High Byte
Data Bus<7:0>
8
TMR3H
8 8
8
Read TMR3L
Write TMR3L
Set TMR3IF flag bit
on Overflow
TT1P (1)
Note 1: Signal coming from TMR1 oscillator (see Figure 14-2 ).
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PIC18C Reference Manual
DS39516A-page 16-12 2000 Microchip Technology Inc.
16.11 Typical Application
The external oscillator clock input feature is typically used in applications where real-time needs
to be kept, but it is also desirable to have the lowest possible power consumption. The Timer1
oscillator allows the device to be placed in sleep, while the timer continues to increment. When
Timer3 overflows the interrupt wakes up the device so that the appropriate registers can be
updated.
Figure 16-4: Timer3 Application
In this example, a 32kHz crystal is used as the time base for the Real Time Clock. If the clock
needs to be updated at 1 second intervals, then the Timer1 must be loaded with a value to allow
the Timer1 to overflow at the desired rate. In the case of a 1 second Timer1 overflow, the TMR1H
register should be loaded with a value of 80k after each overflow.
8
4
4
4
4x4
Keypad
Current Sink
VSS
VDD
32 kHz
Backup
Battery
Power-Down
Detect
OSC1
TMR3
T1OSI
T1OSO
TT1P
Note: The TMR3L register should never be modified, since an external clock is asychronous
to the system clock. Writes to the TRM3L register may corrupt the real time
counter value causing inaccuracies.
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2000 Microchip Technology Inc. DS39516A-page 16-13
Section 16. Timer3
Timer3
16
16.12 Sleep Operation
When Timer3 is configured for asynchronous operation, the TMR3 registers will continue to
increment for each timer clock (or prescale multiple of clocks). When the TMR3 register overflows,
the TMR3IF bit will get set, and if enabled, generate an interrupt that will wake the processor
from sleep mode.
The Timer1 oscillator will add a delta current, due to the operation of this circuitry. That is, the
power-down current will no longer only be the leakage current of the device, but also the active
current of the Timer1 oscillator and other Timer1 circuitry.
16.13 Timer3 Prescaler
The prescaler counter is cleared on writes to the TMR3H or TMR3L registers.
Table 16-3: Registers Associated with Timer3 as a Timer/Counter
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on
all other
resets
INTCON GIE PEIE T0IE INTE RBIE T0IF INTF RBIF 0000 000x 0000 000u
PIR TMR3IF (1) 0 0
PIE TMR3IE (1) 0 0
IPR TMR3IP (1) 0 0
TMR3L Holding register for the Least Significant Byte of the 16-bit TMR3 register xxxx xxxx uuuu uuuu
TMR3H Holding register for the Most Significant Byte of the 16-bit TMR3 register xxxx xxxx uuuu uuuu
T3CON RD16 T3CKPSI T3CKPS0 T30SCEN T3SYNC TMR3CS TMR3ON --00 0000 --uu uuuu
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'.
Shaded cells are not used by the Timer1 module.
Note 1: The placement of this bit is device dependent.
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DS39516A-page 16-14 2000 Microchip Technology Inc.
16.14 Initialization
Since Timer3 has a software programmable clock source, there are three examples to show the
initialization of each mode. Example 16-4 shows the initialization for the internal clock source,
Example 16-5 shows the initialization for the external clock source, and Example 16-6 shows the
initialization of the external oscillator mode.
Example 16-4:Timer3 Initialization (Internal Clock Source)
Example 16-5:Timer3 Initialization (External Clock Source)
CLRF T3CON ; Stop Timer3, Internal Clock Source,
; T1 oscillator disabled,
; prescaler = 1:1
CLRF TMR3H ; Clear Timer3 High byte register
CLRF TMR3L ; Clear Timer3 Low byte register
CLRF INTCON ; Disable interrupts
CLRF PIE1 ; Disable peripheral interrupts
CLRF PIR1 ; Clear peripheral interrupts Flags
MOVLW 0x30 ; Internal Clock source
; with 1:8 prescaler
MOVWF T3CON ; Timer3 is stopped and
; T1 osc is disabled
BSF T3CON, TMR3ON ; Timer3 starts to increment
;
; The Timer3 interrupt is disabled, do polling on the overflow bit
;
T3_OVFL_WAIT
BTFSS PIR1, TMR3IF
GOTO T3_OVFL_WAIT
;
; Timer has overflowed
;
BCF PIR1, TMR3IF
CLRF T3CON ; Stop Timer3, Internal Clock Source,
; T1 oscillator disabled,
; prescaler = 1:1
CLRF TMR3H ; Clear Timer3 High byte register
CLRF TMR3L ; Clear Timer3 Low byte register
CLRF INTCON ; Disable interrupts
CLRF PIE1 ; Disable peripheral interrupts
CLRF PIR1 ; Clear peripheral interrupts Flags
MOVLW 0x32 ; External Clock source
; with 1:8 prescaler
MOVWF T3CON ; Clock source is
; synchronized to device
; Timer3 is stopped and
; T1 osc is disabled
BSF T3CON, TMR3ON ; Timer3 starts to increment
;
; The Timer3 interrupt is disabled, do polling on the overflow bit
;
T3_OVFL_WAIT
BTFSS PIR1, TMR3IF
GOTO T3_OVFL_WAIT
;
; Timer has overflowed
;
BCF PIR1, TMR3IF
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2000 Microchip Technology Inc. DS39516A-page 16-15
Section 16. Timer3
Timer3
16
Example 16-6:Timer3 Initialization (External Oscillator Clock Source)
CLRF T3CON ; Stop Timer3, Internal Clock Source,
; T1 oscillator disabled,
; prescaler = 1:1
CLRF TMR3H ; Clear Timer3 High byte register
CLRF TMR3L ; Clear Timer3 Low byte register
CLRF INTCON ; Disable interrupts
CLRF PIE1 ; Disable peripheral interrupts
CLRF PIR1 ; Clear peripheral interrupts Flags
MOVLW 0x3E ; External Clock source
; with oscillator
MOVWF T3CON ; circuitry, 1:8 prescaler,
; Clock source is
; asynchronous to device
; Timer3 is stopped
BSF T3CON, TMR3ON ; Timer3 starts to increment
;
; The Timer3 interrupt is disabled, do polling on the overflow bit
;
T3_OVFL_WAIT
BTFSS PIR1, TMR3IF
GOTO T3_OVFL_WAIT
;
; Timer has overflowed
;
BCF PIR1, TMR3IF
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PIC18C Reference Manual
DS39516A-page 16-16 2000 Microchip Technology Inc.
16.15 Design Tips
Question 1: Timer3 does not seem to be keeping accurate time.
Answer 1:
There are a few reasons that this could occur:
1. You should never write to Timer3, where that could cause the loss of time. In most cases,
that means you should not write to the TMR3L register, but if the conditions are ok, you
may write to the TMR3H register. Normally you write to the TMR3H register if you want
the Timer3 overflow interrupt to be sooner then the full 16-bit time-out.
2. You should ensure the your layout uses good PCB layout techniques so that noise does
not couple onto the Timer1/Timer3 oscillator lines.
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2000 Microchip Technology Inc. DS39516A-page 16-17
Section 16. Timer3
Timer3
16
16.16 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhance family (that is they may be written for
the Baseline, the Midrange, or High-end families), but the concepts are pertinent, and could be
used (with modification and possible limitations). The current application notes related to Timer1
are:
Title Application Note #
Using Timer1 in Asynchronous Clock Mode AN580
Low Power Real Time Clock AN582
Yet another Clock using the PIC16C92X AN649
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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PIC18C Reference Manual
DS39516A-page 16-18 2000 Microchip Technology Inc.
16.17 Revision History
Revision A
This is the initial released revision of the Timer3 module description.
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2000 Microchip Technology Inc. DS39517A-page 17-1
CCP
17
Section 17. Compare/Capture/PWM (CCP)
HIGHLIGHTS
This section of the manual contains the following major topics:
17.1 Introduction .................................................................................................................. 17-2
17.2 CCP Control Register .................................................................................................. 17-3
17.3 Capture Mode .............................................................................................................. 17-4
17.4 Compare Mode ............................................................................................................ 17-7
17.5 PWM Mode ................................................................................................................ 17-10
17.6 Initialization ................................................................................................................ 17-15
17.7 Design Tips ................................................................................................................ 17-17
17.8 Related Application Notes.......................................................................................... 17-19
17.9 Revision History ......................................................................................................... 17-20
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DS39517A-page 17-2 2000 Microchip Technology Inc.
17.1 Introduction
Each CCP (Capture/Compare/PWM) module has three 8-bit registers. These are:
• An 8-bit control register (CCPxCON)
• A 16-bit register (CCPRxH:CCPRxL) that operates as:
- a 16-bit capture register
- a 16-bit compare register
- a 10-bit PWM master/slave duty cycle register
Multiple CCP modules may exist on a single device. The CCP modules are identical in operation,
with the exception of the operation of the special event trigger.
Throughout this section, we use generic names for the CCP registers. These generic names are
shown in Table 17-1.
Table 17-1: Specific to Generic CCP Nomenclature
17.1.1 Timer Resources
Table 17-2 shows the resources of the CCP modules, in each of its modes. Table 17-3 shows the
interactions between the CCP modules, where CCPx is one CCP module and CCPy is another
CCP module.
Table 17-2: CCP Mode - Timer Resource
Table 17-3: Interaction of Two CCP Modules
Generic Name CCP1 CCP2 Comment
CCPxCON CCP1CON CCP2CON CCP Control Register
CCPRxH CCPR1H CCPR2H CCP high byte
CCPRxL CCPR1L CCPR2L CCP low byte
CCPx CCP1 CCP2 CCP pin
CCP Mode Timer Resource
Capture
Compare
PWM
Timer1 or Timer3
Timer1 or Timer3
Timer2
CCPx
Mode
CCPy
Mode Interaction
Capture Capture TMR1 or TMR3 time-base. Time base can be different for each CCP.
Capture Compare The compare could be configured for the special event trigger, which
clears either TMR1 or TMR3 depending upon which time base is used.
Compare Compare The compare(s) could be configured for the special event trigger, which
clears TMR1 or TMR3 depending upon which time base is used.
PWM PWM The PWMs will have the same frequency, and update rate
(TMR2 interrupt).
PWM Capture None
PWM Compare None
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2000 Microchip Technology Inc. DS39517A-page 17-3
Section 17. CCP
CCP
17
17.2 CCP Control Register
Register 17-1 shows the CCP Control Register. This register selects the mode of operation of the
CCP module, as well as contains the 2-LSb of the PWM Duty Cycle.
Register 17-1: CCPxCON Register
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — DCxB1 DCxB0 CCPxM3 CCPxM2 CCPxM1 CCPxM0
bit 7 bit 0
bit 7-6 Unimplemented: Read as '0'
bit 5-4 DCxB<1:0>: PWM Duty Cycle bit1 and bit0
Capture Mode:
Unused
Compare Mode:
Unused
PWM Mode:
These bits are the two LSbs (bit1 and bit0) of the 10-bit PWM duty cycle. The upper eight
bits (DCx<9:2>) of the duty cycle are found in CCPRxL.
bit 3-0 CCPxM<3:0>: CCPx Mode Select bits
0000 = Capture/Compare/PWM off (resets CCPx module)
0001 = Reserved
0010 = Compare mode, toggle output on match (CCPxIF bit is set)
0011 = Reserved
0100 = Capture mode, every falling edge
0101 = Capture mode, every rising edge
0110 = Capture mode, every 4th rising edge
0111 = Capture mode, every 16th rising edge
1000 = Compare mode,
Initialize CCP pin Low, on compare match force CCP pin High (CCPIF bit is set)
1001 = Compare mode,
Initialize CCP pin High, on compare match force CCP pin Low (CCPIF bit is set)
1010 = Compare mode,
Generate software interrupt on compare match
(CCPIF bit is set, CCP pin is unaffected)
1011 = Compare mode,
Trigger special event (CCPIF bit is set)
11xx = PWM mode
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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DS39517A-page 17-4 2000 Microchip Technology Inc.
17.3 Capture Mode
In Capture mode, CCPRxH:CCPRxL captures the 16-bit value of the TMR1 or TMR3 register
when an event occurs on the CCPx pin. An event is defined as:
• Every falling edge
• Every rising edge
• Every 4th rising edge
• Every 16th rising edge
An event is selected by control bits CCPxM3:CCPxM0 (CCPxCON<3:0>). When a capture is
made, the interrupt request flag bit, CCPxIF, is set. The CCPxIF bit must be cleared in software.
If another capture occurs before the value in register CCPRx is read, the old captured value will
be lost.
When the Capture mode is changed, a false capture interrupt may be generated. The user
should keep bit CCPxIE clear to avoid false interrupts and should clear flag bit CCPxIF following
any such change in operating mode.
Figure 17-1 shows that a capture does not modify (clear) the 16-bit timer register. This is so the
timer (Timer1 or Timer3) can also be used as the time-base for other operations.
The time between two captures can easily be computed as the difference between the value of
the 2nd capture and that of the 1st capture. When the timer overflows, the timer interrupt bit,
TMRxIF will be set. If enabled, an interrupt will occur, allowing the time-base to be extended to
greater than 16 bits.
Note: The dedicated time base (Timer1 or Timer3) must be running in Timer mode or Synchronized
Counter mode for the CCP module to use the capture feature. In Asynchronous
Counter mode, the capture operation may not work.
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2000 Microchip Technology Inc. DS39517A-page 17-5
Section 17. CCP
CCP
17
17.3.1 CCP Pin Configuration
In Capture mode, the CCPx pin should be configured as an input by setting its corresponding
TRIS bit. The prescaler can be used to get a very fine average resolution on a constant input
frequency. For example, if we have a stable input frequency and we set the prescaler to 1:16,
then the total error for those 16 periods is 1 TCY. This gives an effective resolution of TCY/16,
which at 40 MHz is 6.25 ns. This technique is only valid where the input frequency is “stable” over
the 16 samples. Without using the prescaler (1:1), each sample would have a resolution of TCY.
Figure 17-1: Capture Mode Operation Block Diagram
Note: If the CCPx pin is configured as an output, a write to the port can cause a capture
condition.
CCPR1H CCPR1L
TMR1H TMR1L
Set flag bit CCPxIF
TMR3
Enable
Q’s
CCP1CON<3:0>
CCPx Pin
Prescaler
³ 1, 4, 16
and
edge detect
TMR3H TMR3L
TMR1
Enable
T3CCP2
T3CCP2
CCPR2H CCPR2L
TMR1H TMR1L
Set flag bit CCP2IF
TMR3
Enable
Q’s
CCP2CON<3:0>
CCPx Pin
Prescaler
³ 1, 4, 16
and
edge detect
TMR3H TMR3L
TMR1
Enable
T3CCP2
T3CCP1
T3CCP2
T3CCP1
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DS39517A-page 17-6 2000 Microchip Technology Inc.
17.3.2 Changing Between Capture Modes
When the Capture mode is changed, a capture interrupt may be generated. The user should
keep the CCPxIE bit clear to disable these interrupts and should clear the CCPxIF flag bit following
any such change in operating mode.
17.3.2.1 CCP Prescaler
There are four prescaler settings, specified by the CCPxM3:CCPxM0 bits. Whenever the CCP
module is turned off, or the CCP module is not in capture mode, the prescaler counter is cleared.
This means that any reset will clear the prescaler counter.
Switching from one capture prescale setting to another may generate an interrupt. Also, the prescaler
counter will not be cleared, therefore the first capture may be from a non-zero prescaler.
Example 17-1 shows the recommended method for switching between capture prescale settings.
This example uses CCP1 and clears the prescaler counter so not to generate an unintended
interrupt.
Example 17-1:Changing Between Capture Prescalers
To clear the Capture prescaler count, the CCP module must be configured into any non-capture
CCP mode (Compare, PWM, or CCP off modes).
17.3.3 Sleep Operation
When the device is placed in SLEEP, the timer will not increment (since it is in synchronous
mode), but the prescaler will continue to count events (not synchronized). When a specified capture
event occurs, the CCPxIF bit will be set, but the capture register will not be updated. If the
CCP interrupt is enabled, the device will wake-up from SLEEP. The value in the 16-bit TMR1 register
is not transferred to the 16-bit capture register. Effectively, this allows the CCP pin to be
used as another external interrupt.
17.3.4 Effects of a Reset
The CCP module is off, and the value in the capture prescaler is cleared.
CLRF CCP1CON ; Turn CCP module off
MOVLW NEW_CAPT_PS ; Load the W reg with the new prescaler
; mode value and CCP ON
MOVWF CCP1CON ; Load CCP1CON with this value
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2000 Microchip Technology Inc. DS39517A-page 17-7
Section 17. CCP
CCP
17
17.4 Compare Mode
In Compare mode, the 16-bit CCPRx register value is constantly compared against the TMR1 or
TMR3 register pair value. When a match occurs, the CCPx pin is:
• Driven High
• Driven Low
• Toggle output (Low to High or High to Low)
• Not affected (remains unchanged) and configured as I/O pin
The action on the pin is based on the value of control bits CCPxM3:CCPxM0
(CCPxCON3:CCPxCON0). At the same time, interrupt flag bit CCPxIF is set.
Figure 17-2: Compare Mode Operation Block Diagram
Note: The dedicated time base (Timer1 or Timer3) must be running in Timer mode or Synchronized
Counter mode if the CCP module is using the compare feature. In Asynchronous
Counter mode, the compare operation may not work.
CCPR1H CCPR1L
TMR1H TMR1L
Comparator Q S
R
Output
Logic
Special Event Trigger
Set flag bit CCP1IF
CCP1 match
TRISX
CCP1CON<3:0>
Mode Select
Output Enable
Pin
Special event trigger will:
Reset Timer1or Timer3, but not set Timer1 or Timer3 interrupt flag bit,
and set bit GO/DONE (ADCON0 register),
which starts an A/D conversion (CCP2 only).
TMR3H TMR3L
T3CCP2
CCPR2H CCPR2L
Comparator
0 1
T3CCP2
T3CCP1
Q S
R
Output
Logic
Special Event Trigger
Set flag bit CCP2IF
CCP2 match
TRIS
CCP2CON<3:0>
Mode Select
Output Enable
Pin
0 1
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DS39517A-page 17-8 2000 Microchip Technology Inc.
17.4.1 CCP Pin Operation in Compare Mode
The user must configure the CCPx pin as an output by clearing the appropriate TRIS bit.
Selecting the compare output mode, forces the state of the CCP pin to the state that is opposite
of the match state. So if the Compare mode is selected to force the output pin low on match,
then the output will be forced high until the match occurs (or the mode is changed). In the compare
toggle mode, the CCPx pin output is initially forced to the low state.
17.4.2 Software Interrupt Mode
When Generate Software Interrupt mode is chosen, the CCPx pin is not affected. Only a CCP
interrupt is generated (if enabled).
17.4.3 Special Event Trigger
In this mode, an internal hardware trigger is generated that may be used to initiate an action.
The special event trigger output of CCPx resets the assigned timer register pair (TMR1 or TMR3
depending upon the state of the T3CCPx bits). This allows the CCPRxH:CCPRxL registers to
effectively be a 16-bit programmable period register for the timer (Timer1 or Timer3).
For some devices, the special trigger output of the CCP module resets the timer (TMR1 or TMR3)
register pair (depending upon the state of the T3CCPx bits), and starts an A/D conversion (if the
A/D module is enabled).
17.4.4 Sleep Operation
When the device is placed in SLEEP, the timer will not increment (since it is in Synchronous
mode), and the state of the module will not change. If the CCP pin is driving a value, it will continue
to drive that value. When the device wakes-up, it will continue from this state.
17.4.5 Effects of a Reset
The CCP module is off.
Note: Clearing the CCPxCON register will force the CCPx compare output latch to the
default low level. This is not the Port I/O data latch.
Note: The special event trigger will not set the Timers interrupt flag bit, TMRxIF.
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Section 17. CCP
CCP
17
Table 17-4: Registers Associated with Capture, Compare, Timer1 and Timer3
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR,
BOR
Value on
all other
resets
INTCON GIE/
GIEH
PEIE/
GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIR1 PSPIF (1) ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
PIE1 PSPIE (1) ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
IPR1 PSPIP (1) ADIP RCIP TXIP SSPIP CCP1IP TMR2IP TMR1IP 0000 0000 0000 0000
TRISC PORTC Data Direction Register 1111 1111 1111 1111
TMR1L Holding register for the Least Significant Byte of the 16-bit TMR1 register xxxx xxxx uuuu uuuu
TMR1H Holding register for the Most Significant Byte of the 16-bit TMR1register xxxx xxxx uuuu uuuu
T1CON RD16 — T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON --00 0000 --uu uuuu
CCPR1L Capture/Compare/PWM register1 (LSB) xxxx xxxx uuuu uuuu
CCPR1H Capture/Compare/PWM register1 (MSB) xxxx xxxx uuuu uuuu
CCP1CON — — DC1B1 DC1B0 CCP1M3 CCP1M2 CCP1M1 CCP1M0 --00 0000 --00 0000
CCPR2L Capture/Compare/PWM register2 (LSB) xxxx xxxx uuuu uuuu
CCPR2H Capture/Compare/PWM register2 (MSB) xxxx xxxx uuuu uuuu
CCP2CON — — DC2B1 DC2B0 CCP2M3 CCP2M2 CCP2M1 CCP2M0 --00 0000 --00 0000
PIR2 — — — — BCLIF LVDIF TMR3IF CCP2IF 0000 0000 0000 0000
PIE2 — — — — BCLIE LVDIE TMR3IE CCP2IE 0000 0000 0000 0000
IPR2 — — — — BCLIP LVDIP TMR3IP CCP2IP 0000 0000 0000 0000
TMR3L Holding register for the Least Significant Byte of the 16-bit TMR3 register xxxx xxxx uuuu uuuu
TMR3H Holding register for the Most Significant Byte of the 16-bit TMR3 register xxxx xxxx uuuu uuuu
T3CON RD16 T3CCP2 T3CKPS1 T3CKPS0 T3CCP1 T3SYNC TMR3CS TMR3ON -000 0000 -uuu uuuu
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'.
Shaded cells are not used by Capture, Compare, Timer1 and Timer3.
Note 1: The PSPIF, PSPIE and PSPIP bits are reserved on the PIC18C2x2 devices. Always maintain these bits clear.
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DS39517A-page 17-10 2000 Microchip Technology Inc.
17.5 PWM Mode
In Pulse Width Modulation (PWM) mode, the CCPx pin produces up to a 10-bit resolution PWM
output. Since the CCPx pin is multiplexed with the PORT data latch, the corresponding TRIS bit
must be cleared to make the CCPx pin an output.
Figure 17-3 shows a simplified block diagram of one CCP module in PWM mode. Depending on
the device there can be more than one CCP module connected to Timer2. Each CCP module
can support one Pulse Width Modulation (PWM) output signal. This PWM signal can attain a resolution
of up to 10-bits, from the 8-bit Timer2 module. Two extra bits are used to extend Timer2
to 10 bits (see Section 17.5.1). A PWM output waveform is shown in Figure 17-4.
For a step-by-step procedure on how to set up the CCP module for PWM operation, see
Section 17.5.4.
Figure 17-3: Simplified PWM Block Diagram
Figure 17-4: PWM Output Waveform
Note: Clearing the CCPxCON register will force the CCPx PWM output latch to the default
low level. This is not the Port I/O data latch.
CCPRxL
CCPRxH (Slave)
Comparator
TMR2
Comparator
PR2
R Q
S
Duty Cycle Registers CCPxCON<5:4>
Clear Timer,
TRIS
CCPx
Timer2 Module
(Note 1)
8
8
10
10
10
CCP Module
Note 1: For 10-bit time base generation see Section 17.5.1.
(DCxB<9:2>)
(DCxB<1:0>)
Force CCPx pin high,
and latch the Duty Cycle
Period = PR2 + 1
Timer2 is cleared and new duty cycle value is loaded from the Duty Cycle latch into the
Timer2 value equals to value in Duty Cycle Latch register, CCP Pin is driven low
Timer2 overflow, value from Duty Cycle Latch is loaded into Slave Register, CCP Pin driven high
DutyCycle = DCxB9:DCxB0
1 3 2
2
3
1
Duty Cycle Slave register
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Section 17. CCP
CCP
17
17.5.1 10-bit Time Base Generation
The PWM output has up to 10-bits of resolution. This is achieved by creating a 10-bit PWM Time
base (TB9:TB0). Figure 17-5 shows the block diagram of this 10-bit PWM Time base. When
TSCLK is the clock source to the 10-bit counter, the counter increments on each Tsclk. If a
prescaler is selected, the 10-bit counter increments every prescale would by TSCLK.
Figure 17-5: 10-bit Time Base Block Diagram
17.5.2 PWM Period
The PWM period is specified by writing to the PR2 register. The PWM period can be calculated
using Equation 17-1.
Equation 17-1:Calculation for PWM Period
When TMR2 is equal to PR2, the following three events occur on the next increment cycle:
• TMR2 is cleared
• The CCPx pin is set (exception: if PWM duty cycle = 0%, the CCPx pin will not be set)
• The PWM duty cycle is latched from CCPRxL into CCPRxH
TMR2 TSCLK
Note 1: These two bits are not readable or writable and are not mapped into the data
memory.
TB0 (1) TB1 TB9 TB2 (1)
Prescaler
TMR2
Where PR2 = Value in PR2 Register
TSCLK = Oscillator Clock
TPWM period = [(PR2) + 1] • 4 • TSCLK • (TMR2 prescale value)
Note: The Timer2 postscaler is not used in the determination of the PWM frequency. The
postscaler could be used to generate TMR2 interrupts at a different frequency than
the PWM output.
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DS39517A-page 17-12 2000 Microchip Technology Inc.
17.5.3 PWM Duty Cycle
The PWM duty cycle is specified by writing to the CCPRxL register and to the DCxB1:DCxB0
(CCPxCON<5:4>) bits, if 10-bit resolution is desired. The CCPRxL contains the eight MSbs and
CCPxCON<5:4> contains the two LSbs. This 10-bit value is represented by DCxB9:DCxB0.
Equation 17-2 is used to calculate the PWM duty cycle.
Equation 17-2:Equation for calculating the PWM Duty Cycle
The DCxB<9:0> bits can be written to at any time, but the duty cycle value is not latched into
CCPRxH until after a match between PR2 and TMR2 occurs (which is the end of the current
period). In PWM mode, CCPRxH is a read-only register.
The CCPRxH register and a 2-bit internal latch are used to double buffer the PWM duty cycle.
This double buffering is essential for glitchless PWM operation.
When CCPRxH and a 2-bit latch match the value of TMR2 concatenated with the internal 2-bit
Q clock (or two bits of the TMR2 prescaler), the CCPx pin is cleared. This is the end of the duty
cycle. Equation 17-3 is used to calculate the maximum PWM resolution in bits for a given PWM
frequency.
Equation 17-3:Calculation for Maximum PWM Resolution
17.5.3.1 Minimum Resolution
The minimum resolution (in time) of each bit of the PWM duty cycle depends on the prescaler of
Timer2. Table 17-5 shows the selections for the minimum resolution time.
Table 17-5: Minimum Duty Cycle Bit Time
Where PWM Duty Cycle = PWM Duty Cycle Time
TSCLK = Oscillator Clock
PWM Duty Cycle = (DCxB<9:0> bits value) • TSLCK • (TMR2 prescale value)
log( FPWM
log(2)
FOSC )
Maximum PWM Resolution (bits) = bits
Note: If the PWM duty cycle value is longer than the PWM period, the CCPx pin will not
be cleared. This allows a duty cycle of 100%.
Prescaler
Value T2CKPS1:T2CKPS0 Minimum Resolution
(Time)
1 0 0 TSCLK
4 0 1 TCY
16 1 x 4 TCY
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Section 17. CCP
CCP
17
17.5.3.2 Example Calculation for PWM Period and Duty Cycle
This section shows an example calcuation for the PWM Period and Duty Cycle. Furthermore
example PWM frequencies based upon different oscillator frequencies are given.
Example 17-2:PWM Period and Duty Cycle Calculation
At most, an 8-bit resolution duty cycle can be obtained from a 78.125 kHz frequency and a
20 MHz oscillator (i.e., 0 ≤ DCxB9:DCxB0 ≤ 255). Any value greater than 255 will result in a 100%
duty cycle.
In order to achieve higher resolution, the PWM frequency must be decreased. In order to achieve
higher PWM frequency, the resolution must be decreased.
Table 17-6 lists example PWM frequencies and resolutions for FOSC = 20 MHz. Table 17-7 lists
example PWM frequencies and resolutions for FOSC = 40 MHz. The TMR2 prescaler and PR2
values are also shown.
Table 17-6: Example PWM Frequencies and Bit Resolutions at 20 MHz
Table 17-7: Example PWM Frequencies and Bit Resolutions at 40 MHz
Desired PWM frequency is 78.125 kHz,
Fosc = 20 MHz
TMR2 prescale = 1
1 / 78.125 kHz = [(PR2) + 1] • 4 • 1/20 MHz • 1
12.8 ms = [(PR2) + 1] • 4 • 50 ns • 1
PR2 = 63
Find the maximum resolution of the duty cycle that can be used with a 78.125 kHz frequency
and 20 MHz oscillator:
1 / 78.125 kHz = 2PWM RESOLUTION • 1/20 MHz • 1
12.8 ms = 2PWM RESOLUTION • 50 ns • 1
256 = 2PWM RESOLUTION
log(256) = (PWM Resolution) • log(2)
PWM Resolution= 8.0
PWM Frequency 1.22 kHz 4.88 kHz 19.53 kHz 78.12 kHz 156.3 kHz 208.3 kHz
Timer Prescaler
(1, 4, 16) 16 4 1 1 1 1
PR2 Value 0xFF 0xFF 0xFF 0x3F 0x1F 0x17
Maximum
Resolution (bits) 10 10 10 8 7 5.5
PWM Frequency 2.44 kHz 9.76 kHz 39.06 kHz 78.12 kHz 208.3 kHz 416.6 kHz
Timer Prescaler
(1, 4, 16) 16 4 1 1 1 1
PR2 Value 0xFF 0xFF 0xFF 0x3F 0x1F 0x17
Maximum
Resolution (bits) 10 10 10 8 7 5.5
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DS39517A-page 17-14 2000 Microchip Technology Inc.
17.5.4 Set-up for PWM Operation
The following steps configure the CCP module for PWM operation:
1. Establish the PWM period by writing to the PR2 register.
2. Establish the PWM duty cycle by writing to the DCxB9:DCxB0 bits.
3. Make the CCPx pin an output by clearing the appropriate TRIS bit.
4. Establish the TMR2 prescale value and enable Timer2 by writing to T2CON.
5. Configure the CCP module for PWM operation.
17.5.5 Sleep Operation
When the device is placed in sleep, Timer2 will not increment, and the state of the module will
not change. If the CCP pin is driving a value, it will continue to drive that value. When the device
wakes-up, it will continue from this state.
17.5.6 Effects of a Reset
The CCP module is off.
Table 17-8: Registers Associated with PWM and Timer2
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR,
BOR
Value on
all other
resets
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIR1 TMR2IF (1) 0000 0000 0000 0000
PIE1 TMR2IE (1) 0000 0000 0000 0000
IPR1 TMR2IP (1) 0000 0000 0000 0000
TRISC PORTC Data Direction Register 1111 1111 1111 1111
TMR2 Timer2 module’s register 0000 0000 0000 0000
PR2 Timer2 module’s period register 1111 1111 1111 1111
T2CON — TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0 -000 0000 -000 0000
CCPR1L Capture/Compare/PWM register1 (LSB) xxxx xxxx uuuu uuuu
CCPR1H Capture/Compare/PWM register1 (MSB) xxxx xxxx uuuu uuuu
CCP1CON — — DC1B1 DC1B0 CCP1M3 CCP1M2 CCP1M1 CCP1M0 --00 0000 --00 0000
CCPR2L Capture/Compare/PWM register2 (LSB) xxxx xxxx uuuu uuuu
CCPR2H Capture/Compare/PWM register2 (MSB) xxxx xxxx uuuu uuuu
CCP2CON — — DC2B1 DC2B0 CCP2M3 CCP2M2 CCP2M1 CCP2M0 --00 0000 --00 0000
Legend: x = unknown, u = unchanged, — = unimplemented read as '0'.
Shaded cells are not used by PWM and Timer2.
Note 1: The PSPIF, PSPIE and PSPIP bits are reserved on the PIC18C2X2 devices. Always maintain these bits clear.
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Section 17. CCP
CCP
17
17.6 Initialization
The CCP module has three modes of operation. Example 17-3 shows the initialization of capture
mode, Example 17-4 shows the initialization of compare mode and Example 17-5 shows the
initialization of PWM mode.
Example 17-3:Capture Initialization
CLRF CCP1CON ; CCP Module is off
CLRF TMR1H ; Clear Timer1 High byte
CLRF TMR1L ; Clear Timer1 Low byte
CLRF INTCON ; Disable interrupts and clear T0IF
BSF TRISC, CCP1 ; Make CCP pin input
CLRF PIE1 ; Disable peripheral interrupts
CLRF PIR1 ; Clear peripheral interrupts Flags
MOVLW 0x06 ; Capture mode, every 4th rising edge
MOVWF CCP1CON ;
BSF T1CON, TMR1ON ; Timer1 starts to increment
;
; The CCP1 interrupt is disabled,
; do polling on the CCP Interrupt flag bit
;
Capture_Event
BTFSS PIR1, CCP1IF
GOTO Capture_Event
;
; Capture has occured
;
BCF PIR1, CCP1IF ; This needs to be done before
; next compare
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DS39517A-page 17-16 2000 Microchip Technology Inc.
Example 17-4:Compare Initialization
Example 17-5:PWM Initialization
CLRF CCP1CON ; CCP Module is off
CLRF TMR1H ; Clear Timer1 High byte
CLRF TMR1L ; Clear Timer1 Low byte
CLRF INTCON ; Disable interrupts and clear T0IF
MOVLW 0x80 ; Load 0x80 (Example Value)
; into W-Register
MOVWF CCPRIH ; Load value to compare into CCPRIH
MOVWF CCPRIL ; Load value to compare into CCPRIL
BCF TRISC, CCP1 ; Make CCP pin output if controlling
; state of pin
CLRF PIE1 ; Disable peripheral interrupts
CLRF PIR1 ; Clear peripheral interrupts Flags
MOVLW 0x08 ; Compare mode, set CCP1 pin on match
MOVWF CCP1CON ;
BSF T1CON, TMR1ON ; Timer1 starts to increment
;
; The CCP1 interrupt is disabled,
; do polling on the CCP Interrupt flag bit
;
Compare_Event
BTFSS PIR1, CCP1IF
GOTO Compare_Event
;
; Compare has occured
;
BCF PIR1, CCP1IF ; This needs to be done before
; next compare
CLRF CCP1CON ; CCP Module is off
CLRF TMR2 ; Clear Timer2
MOVLW 0x7F ;
MOVWF PR2 ;
MOVLW 0x1F ;
MOVWF CCPR1L ; Duty Cycle is 25% of PWM Period
CLRF INTCON ; Disable interrupts and clear T0IF
BCF TRISC, PWM1 ; Make pin output
CLRF PIE1 ; Disable peripheral interrupts
CLRF PIR1 ; Clear peripheral interrupts Flags
MOVLW 0x2C ; PWM mode, 2 LSbs of
; Duty cycle = 10
MOVWF CCP1CON ;
BSF T2CON, TMR2ON ; Timer2 starts to increment
;
; The CCP1 interrupt is disabled,
; do polling on the TMR2 Interrupt flag bit
;
PWM_Period_Match
BTFSS PIR1, TMR2IF
GOTO PWM_Period_Match
;
; Update this PWM period and the following PWM Duty cycle
;
BCF PIR1, TMR2IF
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2000 Microchip Technology Inc. DS39517A-page 17-17
Section 17. CCP
CCP
17
17.7 Design Tips
Question 1: What timers can I use for the capture and compare modes?
Answer 1:
The capture and compare modes are designed around Timer1 and Timer3, so no other timer can
be used for these functions. This also means that if multiple CCP modules are being used for a
capture or compare function, they can share the same timer.
Question 2: What timers can I use with the PWM mode?
Answer 2:
The PWM mode is designed around Timer2, so no other timer can be used for this function. It is
the only timer with a period register associated with it. If multiple CCP modules are doing PWM,
they will share the same timer and have the same PWM period and frequency.
Question 3: Can I use one CCP module to do capture (or compare) AND PWM at the
same time, since they use different timers as their reference?
Answer 3:
The timers may be different, but other logic functions are shared. However, you can switch from
one mode to the other. For a device with 2 CCP modules, you can also have CCP1 set up for
PWM and CCP2 set up for capture or compare (or vice versa) since they are two independent
modules.
Question 4: How does a reset affect the CCP module?
Answer 4:
Any reset will turn the CCP module off. See the “Reset” section to see reset values.
Question 5: I am setting up the CCP1CON module for “Compare Mode, trigger special
event” (1011) that resets TMR1. When a compare match occurs, will I have
both the TMR1 and the CCP1 interrupts pending (TMR1IF is set, CCP1IF is
set)?
Answer 5:
The CCP1IF flag will be set on the match condition. TMR1IF is set when Timer1 overflows, and
the special trigger reset of Timer1 is not considered an overflow. However, if both the CCPR1L
and CCPR1H registers are set at FFh, then an overflow occurs at the same time as the match,
which will then set both CCP1IF and TMR1IF.
Question 6: How do I use Timer2 as a general purpose timer, with an interrupt flag on
rollover?
Answer 6:
Timer2 always resets to zero when it equals PR2 and flag bit TMR2IF always gets set at this time.
By putting FFh into PR2, you will get an interrupt on overflow at FFh. Quite often it is desirable
to have an event occur at a periodic rate, perhaps an interrupt driven event. Normally an initial
value would be placed into the timer so that the overflow will occur at the desired time. This value
would have to be placed back into the timer every time it overflowed to make the interrupts occur
at the same desired rate. The benefit of Timer2 is that a value can be written to PR2 that will
cause it to reset at your desired time interval. This means you do not have the housekeeping
chore of reloading the timer every time it overflows, since PR2 maintains its value.
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DS39517A-page 17-18 2000 Microchip Technology Inc.
Question 7: I am using a CCP module in PWM mode. The duty cycle being outputted is
almost always 100%, even when my program writes a value like 7Fh to the
duty cycle register, which should be 50%. What am I doing wrong?
Answer 7:
1. The value in CCPRxL is higher than PR2. This happens quite often when a user desires
a fast PWM output frequency and writes a small value in the PR2. In this case, if a value
of 7Eh were written to PR2, then a value 7Fh in CCPRxL will result in 100% duty cycle.
2. If the TRIS bit corresponding to the CCP output pin you are using is configured as an
input, the PWM output cannot drive the pin. In this case, the pin would float and duty cycle
may appear to be 0%, 100% or some other floating value.
Question 8: I want to determine a signal frequency using the CCP module in capture
mode to find the period. I am currently resetting Timer1 on the first edge,
then using the value in the capture register on the second edge as the time
period. The problem is that my code to clear the timer does not occur until
almost twelve instructions after the first capture edge (interrupt latency
plus saving of registers in interrupt), so I cannot measure very fast frequencies.
Is there a better way to do this?
Answer 8:
You do not need to zero the counter to find the difference between two pulse edges. Just take
the first captured value and put it into another set of registers. Then when the second capture
event occurs, subtract the first event from the second. Assuming that your pulse edges are not
so far apart that the counter can wrap around past the last capture value, the answer will always
be correct. This is illustrated by the following example:
1. First captured value is FFFEh. Store this value in two registers.
2. The second capture value is 0001h (the counter has incremented three times).
3. 0001h - FFFEh = 0003, which is the same as if you had cleared Timer1 to zero and let it
count to 3. (Theoretically, except that there was a delay getting to the code that clears
Timer1, so actual values would differ).
The interrupt overhead is now less important because the values are captured automatically. For
even faster inputs, do not enable interrupts and just test the flag bit in a loop. If you must also
capture very long time periods, such that the timer can wrap around past the previous capture
value, then consider using an auto-scaling technique that starts with a large prescale, and
shorten the prescale as you converge on the exact frequency.
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Section 17. CCP
CCP
17
17.8 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is, they may be written for
the Base-Line, the Mid-Range or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to the
CCP modules are:
Title Application Note #
Using the CCP Modules AN594
Implementing Ultrasonic Ranging AN597
Air Flow Control Using Fuzzy Logic AN600
Adaptive Differential Pulse Code Modulation AN643
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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DS39517A-page 17-20 2000 Microchip Technology Inc.
17.9 Revision History
Revision A
This is the initial released revision of the Enhanced MCU CCP module description.
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2000 Microchip Technology Inc. DS39518A-page 18-1
ECCP
18
Section 18. ECCP
Please check the Microchip web site for Revision B of the ECCP Section.
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PIC18C Reference Manual
DS39518A-page 18-2 2000 Microchip Technology Inc.
18.1 Revision History
Revision A
This is the initial released revision of the Enhanced MCU ECCP module description.
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2000 Microchip Technology Inc. DS39519A-page 19-1
SSP
19
Section 19. Synchronous Serial Port (SSP)
HIGHLIGHTS
This section of the manual contains the following major topics:
19.1 Introduction .................................................................................................................. 19-2
19.2 Control Registers ......................................................................................................... 19-4
19.3 SPI Mode ..................................................................................................................... 19-8
19.4 SSP I2C Operation .................................................................................................... 19-18
19.5 Initialization ................................................................................................................ 19-28
19.6 Design Tips ................................................................................................................ 19-30
19.7 Related Application Notes.......................................................................................... 19-31
19.8 Revision History ......................................................................................................... 19-32
I
2C is a trademark of Philips Corporation.
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DS39519A-page 19-2 2000 Microchip Technology Inc.
19.1 Introduction
The Synchronous Serial Port (SSP) module is a serial interface useful for communicating with
other peripherals or microcontroller devices. These peripheral devices may be serial EEPROMs,
shift registers, display drivers, A/D converters, etc. The SSP module can operate in one of two
modes:
• Serial Peripheral Interface (SPI™)
• Inter-Integrated Circuit (I2C™)
- Slave mode
- I/O slope control, and Start and Stop bit detection to ease software implementation of
Master and Multi-master modes
SPI is a registered trademark of Motorola Corporation.
I
2C is a trademark of Philips Corporation.
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2000 Microchip Technology Inc. DS39519A-page 19-3
Section 19. SSP
SSP
19
Section 19.2 forced to next page for formatting purposes.
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DS39519A-page 19-4 2000 Microchip Technology Inc.
19.2 Control Registers
Register 19-1 shows the SSPSTAT register while Register 19-2 shows the SSPCON register.
Register 19-1: SSPSTAT: Synchronous Serial Port Status Register
R/W-0 R/W-0 R-0 R-0 R-0 R-0 R-0 R-0
SMP CKE D/A P S R/W UA BF
bit 7 bit 0
bit 7 SMP: SPI data input sample phase
SPI Master Mode
1 = Input data sampled at end of data output time
0 = Input data sampled at middle of data output time
SPI Slave Mode
SMP must be cleared when SPI is used in slave mode
I2C Mode
This bit must be maintained clear.
bit 6 CKE: SPI Clock Edge Select (Figure 19-3, Figure 19-4, and Figure 19-5)
SPI Mode
CKP = 0 (SSPCON<4>)
1 = Data transmitted on rising edge of SCK
0 = Data transmitted on falling edge of SCK
CKP = 1 (SSPCON<4>)
1 = Data transmitted on falling edge of SCK
0 = Data transmitted on rising edge of SCK
I
2C Mode
This bit must be maintained clear.
bit 5 D/A: Data/Address bit (I2C mode only)
1 = Indicates that the last byte received or transmitted was data
0 = Indicates that the last byte received or transmitted was address
bit 4 P: Stop bit
(I2C mode only. This bit is cleared when the SSP module is disabled)
1 = Indicates that a stop bit has been detected last (this bit is '0' on RESET)
0 = Stop bit was not detected last
bit 3 S: Start bit
(I2C mode only. This bit is cleared when the SSP module is disabled)
1 = Indicates that a start bit has been detected last (this bit is '0' on RESET)
0 = Start bit was not detected last
bit 2 R/W: Read/Write bit information (I2C mode only)
This bit holds the R/W bit information following the last address match. This bit is only valid from
the address match to the next start bit, stop bit, or not ACK bit.
1 = Read
0 = Write
bit 1 UA: Update Address (10-bit I2C mode only)
1 = Indicates that the user needs to update the address in the SSPADD register
0 = Address does not need to be updated
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Section 19. SSP
SSP
19
bit 0 BF: Buffer Full Status bit
Receive (SPI and I2C modes)
1 = Receive complete, SSPBUF is full
0 = Receive not complete, SSPBUF is empty
Transmit (I2
C mode only)
1 = Transmit in progress, SSPBUF is full
0 = Transmit complete, SSPBUF is empty
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Register 19-2: SSPCON: Synchronous Serial Port Control Register
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0
bit 7 bit 0
bit 7 WCOL: Write Collision Detect bit
1 = The SSPBUF register was written to while the previous word was being transmitted.
(must be cleared in software)
0 = No collision
bit 6 SSPOV: Receive Overflow Indicator bit
In SPI mode:
1 = A new byte was received while the SSPBUF register was still holding the previous data. In
case of overflow, the data in SSPSR is lost and the SSPBUF is no longer updated. Overflow
can only occur in slave mode. The user must read the SSPBUF, even if only transmitting
data, to avoid setting overflow. In master mode the overflow bit is not set since each new
reception (and transmission) is initiated by writing to the SSPBUF register.
0 = No overflow
In I2C mode:
1 = A byte was received while the SSPBUF register was still holding the previous byte. SSPO
is a “don‘t care” in transmit mode. SSPOV must be cleared in software in either mode.
0 = No overflow
bit 5 SSPEN: Synchronous Serial Port Enable bit
In both modes, when enabled, these pins must be properly configured as input or output.
In SPI mode:
1 = Enables serial port and configures SCK, SDO, SDI, and SS as the source of the
serial port pins
0 = Disables serial port and configures these pins as I/O port pins
In I2C mode:
1 = Enables the serial port and configures the SDA and SCL pins as the source of the
serial port pins
0 = Disables serial port and configures these pins as I/O port pins
bit 4 CKP: Clock Polarity Select bit
In SPI mode:
1 = Idle state for clock is a high level
0 = Idle state for clock is a low level
In I2C mode:
SCK release control
1 = Enable clock
0 = Holds clock low (clock stretch) (Used to ensure data setup time)
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Section 19. SSP
SSP
19
bit 3:0 SSPM3:SSPM0: Synchronous Serial Port Mode Select bits
0000 = SPI master mode, clock = FOSC/4
0001 = SPI master mode, clock = FOSC/16
0010 = SPI master mode, clock = FOSC/64
0011 = SPI master mode, clock = TMR2 output/2
0100 = SPI slave mode, clock = SCK pin. SS pin control enabled.
0101 = SPI slave mode, clock = SCK pin. SS pin control disabled. SS can be used as I/O pin
0110 = I2C slave mode, 7-bit address
0111 = I2C slave mode, 10-bit address
1000 = Reserved
1001 = Reserved
1010 = Reserved
1011 = I2C firmware controlled master mode (slave idle)
1100 = Reserved
1101 = Reserved
1110 = I2C slave mode, 7-bit address with start and stop bit interrupts enabled
1111 = I2C slave mode, 10-bit address with start and stop bit interrupts enabled
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Microwire is a trademark of National Semiconductor.
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DS39519A-page 19-8 2000 Microchip Technology Inc.
19.3 SPI Mode
The SPI mode allows 8-bits of data to be synchronously transmitted and received simultaneously.
All four modes of SPI are supported, as well as Microwire™ (sample edge) when the
SPI is in the master mode.
To accomplish communication, typically three pins are used:
• Serial Data Out (SDO)
• Serial Data In (SDI)
• Serial Clock (SCK)
Additionally a fourth pin may be used when in a slave mode of operation:
• Slave Select (SS)
19.3.1 Operation
When initializing the SPI, several options need to be specified. This is done by programming the
appropriate control bits in the SSPCON register (SSPCON<5:0>) and SSPSTAT<7:6>. These
control bits allow the following to be specified:
• Master Mode (SCK is the clock output)
• Slave Mode (SCK is the clock input)
• Clock Polarity (Idle state of SCK)
• Clock edge (output data on rising/falling edge of SCK)
• Data Input Sample Phase
• Clock Rate (Master mode only)
• Slave Select Mode (Slave mode only)
Figure 19-1 shows the block diagram of the SSP module, when in SPI mode.
Figure 19-1: SSP Block Diagram (SPI Mode)
Read Write
Internal
Data Bus
SDI
SDO
SS
SCK
SSPSR reg
SSPBUF reg
SSPM3:SSPM0
bit0 Shift Clock
SS Control
Enable
Edge
Select
Clock Select
TMR2 output
Prescaler TCY
4, 16, 64
TRIS bit of SCK pin
2
Edge
Select
2
4
39500 18C Reference Manual.book Page 8 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39519A-page 19-9
Section 19. SSP
SSP
19
The SSP consists of a transmit/receive Shift Register (SSPSR) and a buffer register (SSPBUF).
The SSPSR shifts the data in and out of the device, MSb first. The SSPBUF holds the data that
was written to the SSPSR, until the received data is ready. Once the 8-bits of data have been
received, that byte is moved to the SSPBUF register. Then the buffer full detect bit, BF
(SSPSTAT<0>), and interrupt flag bit, SSPIF, are set. This double buffering of the received data
(SSPBUF) allows the next byte to start reception before reading the data that was just received.
Any write to the SSPBUF register during transmission/reception of data will be ignored, and the
write collision detect bit, WCOL (SSPCON<7>), will be set. User software must clear the WCOL
bit so that it can be determined if the following write(s) to the SSPBUF register completed successfully.
When the application software is expecting to receive valid data, the SSPBUF should
be read before the next byte of data to transfer is written to the SSPBUF. Buffer full bit, BF
(SSPSTAT<0>), indicates when SSPBUF has been loaded with the received data (transmission
is complete). When the SSPBUF is read, the BF bit is cleared. This data may be irrelevant if the
SPI is only a transmitter. Generally the SSP Interrupt is used to determine when the transmission/reception
has completed. The SSPBUF must be read and/or written. If the interrupt method
is not going to be used, then software polling can be done to ensure that a write collision does
not occur. Example 19-1 shows the loading of the SSPBUF (SSPSR) for data transmission. The
shaded instruction is only required if the received data is meaningful (some SPI applications are
transmit only).
Example 19-1: Loading the SSPBUF (SSPSR) Register
The SSPSR is not directly readable or writable, and can only be accessed from addressing the
SSPBUF register. Additionally, the SSP status register (SSPSTAT) indicates the various status
conditions.
LOOP BTFSS SSPSTAT, BF ;Has data been received
; (transmit complete)?
GOTO LOOP ;No
MOVF SSPBUF, W ;W reg = contents of SSPBUF
MOVWF RXDATA ;Save in user RAM,
; if data is meaningful
MOVFF TXDATA, SSPBUF ;contents of TXDATA
; is the new data to transmit
39500 18C Reference Manual.book Page 9 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39519A-page 19-10 2000 Microchip Technology Inc.
19.3.2 Enabling SPI I/O
To enable the serial port the SSP Enable bit, SSPEN (SSPCON<5>), must be set. To reset or
reconfigure SPI mode, clear the SSPEN bit which re-initializes the SSPCON register, and then
set the SSPEN bit. This configures the SDI, SDO, SCK, and SS pins as serial port pins. For the
pins to behave as the serial port function, they must have their data direction bits (in the TRIS
register) appropriately programmed. That is:
• SDI must have the TRIS bit set
• SDO must have the TRIS bit cleared
• SCK (Master mode) must have the TRIS bit cleared
• SCK (Slave mode) must have the TRIS bit set
• SS must have the TRIS bit set
Any serial port function that is not desired may be overridden by programming the corresponding
data direction (TRIS) register to the opposite value. An example would be in master mode where
you are only sending data (to a display driver), then both SDI and SS could be used as general
purpose outputs by clearing their corresponding TRIS register bits.
39500 18C Reference Manual.book Page 10 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39519A-page 19-11
Section 19. SSP
SSP
19
19.3.3 Typical Connection
Figure 19-2 shows a typical connection between two microcontrollers. The master controller
(Processor 1) initiates the data transfer by sending the SCK signal. Data is shifted out of both
shift registers on their programmed clock edge, and latched on the edge of the clock specified
by the SMP bit. Both processors should be programmed to same Clock Polarity (CKP), so both
controllers would send and receive data at the same time. Whether the data is meaningful (or
dummy data) depends on the application software. This leads to three scenarios for data transmission:
• Master sends data — Slave sends dummy data
• Master sends data — Slave sends data
• Master sends dummy data — Slave sends data
Figure 19-2: SPI Master/Slave Connection
Serial Input Buffer
(SSPBUF)
Shift Register
(SSPSR)
MSb LSb
SDO
SDI
PROCESSOR 1
SCK
SPI Master SSPM3:SSPM0 = 00xxb
Serial Input Buffer
(SSPBUF)
Shift Register
(SSPSR)
MSb LSb
SDI
SDO
PROCESSOR 2
SCK
SPI Slave SSPM3:SSPM0 = 010xb
Serial Clock
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PIC18C Reference Manual
DS39519A-page 19-12 2000 Microchip Technology Inc.
19.3.4 Master Operation
The master can initiate the data transfer at any time because it controls the SCK. The master
determines when the slave (Processor 2) is to broadcast data by the software protocol.
In master mode the data is transmitted/received as soon as the SSPBUF register is written to. If
the SPI is only going to receive, the SDO output could be disabled (programmed as an input).
The SSPSR register will continue to shift in the signal present on the SDI pin at the programmed
clock rate. As each byte is received, it will be loaded into the SSPBUF register as if a normal
received byte (interrupts and status bits appropriately set). This could be useful in receiver applications
as a “line activity monitor” mode.
The clock polarity is selected by appropriately programming bit CKP (SSPCON<4>). This would
give waveforms for SPI communication as shown in Figure 19-3, Figure 19-4, and Figure 19-5
where the MSb is transmitted first. In master mode, the SPI clock rate (bit rate) is user programmable
to be one of the following:
• FOSC/4 (or TCY)
• FOSC/16 (or 4 • TCY)
• FOSC/64 (or 16 • TCY)
• Timer2 output/2
This allows a maximum data rate of 5 Mbps (at 20 MHz).
Figure 19-3: SPI Mode Waveform, Master Mode
4 clock
modes
Input
Sample (SMP = 0)
Input
Sample (SMP = 1)
SDI (SMP = 0)
bit7 bit0
SDO (CKE = 0) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit0
SDI (SMP = 1)
SSPIF
Write to
SSPBUF
SSPSR to
SSPBUF
SDO (CKE = 1) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
SCK (CKP = 0,
CKE = 0)
SCK (CKP = 0,
CKE = 1)
SCK (CKP = 1,
CKE = 0)
SCK (CKP = 1,
CKE = 1)
Next Q4 cycle
after Q2 ↓
39500 18C Reference Manual.book Page 12 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39519A-page 19-13
Section 19. SSP
SSP
19
19.3.5 Slave Operation
In slave mode, the data is transmitted and received as the external clock pulses appear on SCK.
When the last bit is latched, the interrupt flag bit SSPIF is set.
The clock polarity is selected by appropriately programming bit CKP (SSPCON). This then would
give waveforms for SPI communication as shown in Figure 19-3, Figure 19-4, and Figure 19-5
where the MSb is transmitted first. When in slave mode the external clock must meet the minimum
high and low times.
In sleep mode, the slave can transmit and receive data. When a byte is received, the device will
wake-up from sleep, if the interrupt is enabled.
Figure 19-4: SPI Mode Waveform (Slave Mode With CKE = 0)
SCK (CKP = 1,
SCK (CKP = 0,
Input
Sample (SMP = 0)
SDI
bit7 bit0
SDO bit6 bit5 bit4 bit3 bit2 bit1 bit0
SSPIF
CKE = 0)
CKE = 0)
(SMP = 0)
Write to
SSPBUF
SSPSR to
SSPBUF
SS
optional
Next Q4 Cycle
after Q2↓
bit7
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PIC18C Reference Manual
DS39519A-page 19-14 2000 Microchip Technology Inc.
19.3.6 Slave Select Mode
When in slave select mode, the SS pin allows multi-drop for multiple slaves with a single
master. The SPI must be in slave mode (SSPCON<3:0> = 04h) and the TRIS bit, for the
SS pin, must be set for the slave select mode to be enabled. When the SS pin is low, transmission
and reception are enabled and the SDO pin is driven. When the SS pin goes high,
the SDO pin is no longer driven, even if in the middle of a transmitted byte, and becomes
a floating output. External pull-up/ pull-down resistors may be desirable, depending on the
application.
When the SPI is in Slave Mode with SS pin control enabled, (SSPCON<3:0> = 0100) the SPI
module will reset if the SS pin is set to VDD. If the SPI is used in Slave Mode with the CKE bit is
set, then the SS pin control must be enabled.
When the SPI module resets, the bit counter is forced to 0. This can be done by either by forcing
the SS pin to a high level or clearing the SSPEN bit (Figure 19-6).
To emulate two-wire communication, the SDO pin can be connected to the SDI pin. When the
SPI needs to operate as a receiver the SDO pin can be configured as an input. This disables
transmissions from the SDO. The SDI can always be left as an input (SDI function) since it cannot
create a bus conflict.
Figure 19-5: SPI Mode Waveform (Slave Select Mode With CKE = 1)
SCK
(CKP = 1
SCK
(CKP = 0
Input
Sample
SDI
bit7 bit0
SDO bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
SSPIF
Interrupt
(SMP = 0)
CKE = 1)
CKE = 1)
(SMP = 0)
Write to
SSPBUF
SSPSR to
SSPBUF
SS
Flag
(required)
Next Q4 cycle
after Q2↓
39500 18C Reference Manual.book Page 14 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39519A-page 19-15
Section 19. SSP
SSP
19
Figure 19-6: Slave Synchronization Waveform
SCK
(CKP = 1
SCK
(CKP = 0
Input
Sample
SDI
bit7
SDO bit7 bit6 bit7
SSPIF
Interrupt
(SMP = 0)
CKE = 0)
CKE = 0)
(SMP = 0)
Write to
SSPBUF
SSPSR to
SSPBUF
SS
Flag
bit0
bit7
bit0
(Required)
39500 18C Reference Manual.book Page 15 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39519A-page 19-16 2000 Microchip Technology Inc.
19.3.7 Sleep Operation
In master mode all module clocks are halted, and the transmission/reception will remain in that
state until the device wakes from sleep. After the device returns to normal mode, the module will
continue to transmit/receive data.
In slave mode, the SPI transmit/receive shift register operates asynchronously to the device. This
allows the device to be placed in sleep mode, and data to be shifted into the SPI transmit/receive
shift register. When all 8-bits have been received, the SSP interrupt flag bit will be set and if
enabled will wake the device from sleep.
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2000 Microchip Technology Inc. DS39519A-page 19-17
Section 19. SSP
SSP
19
19.3.8 Effects of a Reset
A reset disables the SSP module and terminates the current transfer.
Table 19-1: Registers Associated with SPI Operation
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR,
BOR
Value on all
other resets
INTCON GIE/
GIEH
PEIE/
GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIR SSPIF (1) 0 0
IPR SSPIP (1) 0 0
SSPBUF Synchronous Serial Port Receive Buffer/Transmit Register xxxx xxxx uuuu uuuu
SSPCON WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0 0000 0000 0000 0000
TRISA — — PORTA Data Direction Register --11 1111 --11 1111
TRISC PORTC Data Direction Control Register 1111 1111 1111 1111
SSPSTAT SMP CKE D/A P S R/W UA BF 0000 0000 0000 0000
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'. Shaded cells are not used by the SSP in SPI
mode.
Note 1: The position of this bit is device dependent.
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PIC18C Reference Manual
DS39519A-page 19-18 2000 Microchip Technology Inc.
19.4 SSP I2C Operation
The SSP module in I2C mode fully implements all slave functions, except general call support,
and provides interrupts on start and stop bits in hardware to facilitate software implementations
of the master functions. The SSP module implements the standard mode specifications as well
as 7-bit and 10-bit addressing. The "Appendix" section gives an overview of the I2C bus specification.
Two pins are used for data transfer. These are the SCL pin, which is the clock, and the SDA pin,
which is the data. The user must configure these pins as inputs through the TRIS bits. The SSP
module functions are enabled by setting SSP Enable bit, SSPEN (SSPCON).
A “glitch” filter is on the SCL and SDA pins when the pin is an input. This filter operates in both
the 100 KHz and 400 KHz modes. In the 100 KHz mode, when these pins are an output, there
is a slew rate control of the pin that is independent of device frequency.
Figure 19-7: SSP Block Diagram (I2C Mode)
Read Write
SSPSR reg
Match detect
SSPADD reg
Start and
Stop bit detect
SSPBUF reg
Internal
Data Bus
Address Match
Set, Reset
S, P bits
(SSPSTAT reg)
SCL
shift
clock
SDA MSb LSb
39500 18C Reference Manual.book Page 18 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39519A-page 19-19
Section 19. SSP
SSP
19
The SSP module has five registers for I2C operation. They are:
• SSP Control Register (SSPCON)
• SSP Status Register (SSPSTAT)
• Serial Receive/Transmit Buffer (SSPBUF)
• SSP Shift Register (SSPSR) - Not directly accessible
• SSP Address Register (SSPADD)
The SSPCON register allows control of the I2C operation. Four mode selection bits
(SSPCON<3:0>) allow one of the following I2C modes to be selected:
• I2C Slave mode (7-bit address)
• I2C Slave mode (10-bit address)
• I2C Firmware controlled Multi-Master mode (start and stop bit interrupts enabled)
• I2C Firmware controlled Multi-Master mode (start and stop bit interrupts enabled)
• I2C Firmware controlled Master mode, slave is idle
Before selecting any I2C mode, the SCL and SDA pins must be programmed to inputs by setting
the appropriate TRIS bits. Selecting an I2C mode by setting the SSPEN bit enables the SCL and
SDA pins to be used as the clock and data lines in I2C mode.
The SSPSTAT register gives the status of the data transfer. This information includes detection
of a START or STOP bit, specifies if the received byte was data or address, if the next byte is the
completion of 10-bit address, and if this will be a read or write data transfer.
The SSPBUF is the register to which transfer data is written to or read from. The SSPSR register
shifts the data in or out of the device. In receive operations, the SSPBUF and SSPSR create a
doubled buffered receiver. This allows reception of the next byte to begin before reading the last
byte of received data. When the complete byte is received, it is transferred to the SSPBUF register
and flag bit SSPIF is set. If another complete byte is received before the SSPBUF register
is read, a receiver overflow has occurred and the SSPOV bit (SSPCON<6>) is set and the byte
in the SSPSR is lost.
The SSPADD register holds the slave address. In 10-bit mode, the user needs to write the high
byte of the address (1111 0 A9 A8 0). Following the high byte address match, the low byte of
the address needs to be loaded (A7:A0).
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PIC18C Reference Manual
DS39519A-page 19-20 2000 Microchip Technology Inc.
19.4.1 Slave Mode
In slave mode, the SCL and SDA pins must be configured as inputs (TRIS set). The SSP module
will override the input state with the output data when required (slave-transmitter).
When an address is matched or the data transfer after an address match is received, the hardware
automatically will generate the acknowledge (ACK) pulse, and then load the SSPBUF register
with the received value currently in the SSPSR register.
There are certain conditions that will cause the SSP module not to give this ACK pulse. These
are if either (or both):
a) The buffer full bit, BF (SSPSTAT<0>), was set before the message completed.
b) The overflow bit, SSPOV (SSPCON<6>), was set before the message completed.
In this case, the SSPSR register value is not loaded into the SSPBUF, but the SSPIF and SSPOV
bits are set. Table 19-2 shows what happens when a data transfer byte is received, given the status
of bits BF and SSPOV. The shaded cells show the condition where user software did not properly
clear the overflow condition. The BF flag bit is cleared by reading the SSPBUF register while
bit SSPOV is cleared through software.
The SCL clock input must have a minimum high and low time for proper operation. The high and
low times of the I2C specification as well as the requirement of the SSP module is shown in the
Device Data Sheet electrical specifications parameters 100 and 101.
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2000 Microchip Technology Inc. DS39519A-page 19-21
Section 19. SSP
SSP
19
19.4.1.1 Addressing
Once the SSP module has been enabled, it waits for a START condition to occur. Following the
START condition, the 8-bits are shifted into the SSPSR register. All incoming bits are sampled
with the rising edge of the clock (SCL) line. The value of register SSPSR<7:1> is compared to
the value of the SSPADD register. The address is compared on the falling edge of the eighth
clock (SCL) pulse. If the addresses match, and the BF and SSPOV bits are clear, the following
events occur:
a) The SSPSR register value is loaded into the SSPBUF register on the falling edge of the
eighth SCL pulse.
b) The buffer full bit, BF, is set on the falling edge of the eighth SCL pulse.
c) An ACK pulse is generated.
d) The SSP interrupt flag bit, SSPIF, is set (and an interrupt is generated if enabled) - on the
falling edge of the ninth SCL pulse.
In 10-bit address mode, two address bytes need to be received by the slave. The five Most
Significant bits (MSbs) of the first address byte specify if this is a 10-bit address. The R/W bit
(SSPSTAT) must specify a write so the slave device will receive the second address byte. For a
10-bit address the first byte would equal ‘1111 0 A9 A8 0’, where A9 and A8 are the two MSbs
of the address. The sequence of events for a 10-bit address is as follows, with steps 7- 9 for
slave-transmitter:
1. Receive first (high) byte of Address (the SSPIF, BF, and UA (SSPSTAT) bits are set).
2. Update the SSPADD register with second (low) byte of Address (clears the UA bit and
releases the SCL line).
3. Read the SSPBUF register (clears the BF bit) and clear the SSPIF flag bit.
4. Receive second (low) byte of Address (the SSPIF, BF, and UA bits are set).
5. Update the SSPADD register with the high byte of Address. This will clear the UA bit and
releases SCL line.
6. Read the SSPBUF register (clears the BF bit) and clear the SSPIF flag bit.
7. Receive repeated START condition.
8. Receive first (high) byte of Address (the SSPIF and BF bits are set).
9. Read the SSPBUF register (clears the BF bit) and clear the SSPIF flag bit.
Table 19-2: Data Transfer Received Byte Actions
Note: Following the RESTART condition (step 7) in 10-bit mode, the user only needs to
match the first 7-bit address. The user does not update the SSPADD for the second
half of the address.
Status Bits as Data
Transfer is Received
SSPSR → SSPBUF
Generate ACK
Pulse
Set bit SSPIF
(SSP Interrupt occurs
BF SSPOV if enabled)
0 0 Yes Yes Yes
1 0 No No Yes
1 1 No No Yes
0 1 Yes No Yes
Note:Shaded cells show the conditions where the user software did not properly clear the
overflow condition.
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PIC18C Reference Manual
DS39519A-page 19-22 2000 Microchip Technology Inc.
19.4.1.2 Reception
When the R/W bit of the address byte is clear and an address match occurs, the R/W bit of the
SSPSTAT register is cleared. The received address is loaded into the SSPBUF register.
When the address byte overflow condition exists, then no acknowledge (ACK) pulse is given. An
overflow condition is defined as either the BF bit (SSPSTAT) is set or the SSPOV bit (SSPCON)
is set. When a byte is received with these conditions, and attempts to move from the SSPSR register
to the SSPBUF register, no acknowledge pulse is given.
An SSP interrupt is generated for each data transfer byte. The SSPIF flag bit must be cleared in
software. The SSPSTAT register is used to determine the status of the receive byte.
Figure 19-8: I
2
C Waveforms for Reception (7-bit Address)
5 76 8 9 P
D6D7 D5 D3D4 D2 D1 D0
S
A7 A6 A5 A4 A3 A2 A1SDA
SCL 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 23 4
Bus Master
terminates
transfer
Bit SSPOV is set because the SSPBUF register is still full.
Cleared in software
SSPBUF register is read
Receiving Data ACK Receiving Data
D6D7 D5 D3D4 D2 D1 D0 ACK
Receiving Address R/W=0
SSPIF
BF (SSPSTAT<0>)
SSPOV (SSPCON<6>)
ACK
ACK is not sent.
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2000 Microchip Technology Inc. DS39519A-page 19-23
Section 19. SSP
SSP
19
Figure 19-9: I
2
C Waveforms for Reception (10-bit Address) SDA SCL SSPIF BF (SSPSTAT<0>) S 1 2 34 56 7 8 9 1 234 5 67 89 1 2345 7 89 P 1 1 1 1 0 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D1 D0 Receive Data Byte ACK R/W = 0ACK Receive First Byte of Address Cleared in software
Bus Master
terminates
transfer
D2
6
(PIR1<3>)
Receive Second Byte of Address
Cleared by hardware when
SSPADD is updated.
UA (SSPSTAT<1>)
Clock is held low until
update of SSPADD has
taken place
UA is set indicating that
the SSPADD needs to be
updated
UA is set indicating that
SSPADD needs to be
updated
SSPBUF is written with
contents of SSPSR
Dummy read of SSPBUF
to clear BF flag
ACK
R/W = 1
Cleared in software
Dummy read of SSPBUF
to clear BF flag
Read of SSPBUF
clears BF flag
Cleared by hardware when
SSPADD is updated.
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PIC18C Reference Manual
DS39519A-page 19-24 2000 Microchip Technology Inc.
19.4.1.3 Transmission
When the R/W bit of the incoming address byte is set and an address match occurs, the R/W bit
of the SSPSTAT register is set. The received address is loaded into the SSPBUF register. The
ACK pulse will be sent on the ninth bit, and the SCL pin is held low. The transmit data must be
loaded into the SSPBUF register, which also loads the SSPSR register. Then the SCL pin should
be enabled by setting the CKP bit (SSPCON<4>). The master must monitor the SCL pin prior to
asserting another clock pulse. The slave devices may be holding off the master by stretching the
clock. The eight data bits are shifted out on the falling edge of the SCL input. This ensures that
the SDA signal is valid during the SCL high time (Figure 19-10).
An SSP interrupt is generated for each data transfer byte. The SSPIF flag bit must be cleared in
software, and the SSPSTAT register is used to determine the status of the byte transfer. The
SSPIF flag bit is set on the falling edge of the ninth clock pulse.
As a slave-transmitter, the ACK pulse from the master-receiver is latched on the rising edge of
the ninth SCL input pulse. If the SDA line was high (not ACK), then the data transfer is complete.
When the not ACK is latched by the slave, the slave logic is reset and the slave then monitors
for another occurrence of the START bit. If the SDA line was low (ACK), the transmit data must
be loaded into the SSPBUF register, which also loads the SSPSR register. Then the SCL pin
should be enabled by setting the CKP bit.
Figure 19-10: I
2C Waveforms for Transmission (7-bit Address)
SDA
SCL
SSPIF
BF (SSPSTAT<0>)
CKP (SSPCON<4>)
A7 A6 A5 A4 A3 A2 A1 ACK D7 D6 D5 D4 D3 D2 D1 D0
Receiving Address R/W = 1 Transmitting Data ACK
123456789 1234 56789 P
cleared in software
SSPBUF is written in software From SSP interrupt
service routine
Set bit after writing to SSPBUF
S Data in
sampled
SCL held low
while CPU responds to SSPIF
(the SSPBUF must be written-to
before the CKP bit can be set)
R/W = 0
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2000 Microchip Technology Inc. DS39519A-page 19-25
Section 19. SSP
SSP
19
Figure 19-11: I
2
C Waveforms for Transmission (10-bit Address) SDA SCL SSPIF BF (SSPSTAT<0>) S 1 234 56 7 8 9 1 234 5 67 89 1 2345 7 89 P 1 1 1 1 0 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 1 1 1 1 0 A8R/W=1 ACK ACK R/W = 0ACK Receive First Byte of Address Cleared in software
Master sends NACK
A9
6
(PIR1<3>)
Receive Second Byte of Address
Cleared by hardware when
SSPADD is updated.
UA (SSPSTAT<1>)
Clock is held low until
update of SSPADD has
taken place
UA is set indicating that
the SSPADD needs to be
updated
UA is set indicating that
SSPADD needs to be
updated
Cleared by hardware when
SSPADD is updated.
SSPBUF is written with
contents of SSPSR
Dummy read of SSPBUF
to clear BF flag
Receive First Byte of Address
D7 D6 D5 D4 D3 D1
12345 789
ACK
D2
6
Transmitting Data Byte
D0
Dummy read of SSPBUF
to clear BF flag
Sr
Cleared in software
Write of SSPBUF
initiates transmit
Cleared in software
Transmit is complete
CKP has to be set for clock to be released
Bus Master
terminates
transfer
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DS39519A-page 19-26 2000 Microchip Technology Inc.
19.4.1.4 Clock Arbitration
Clock arbitration has the SCL pin to inhibit the master device from sending the next clock pulse.
The SSP module in I2C slave mode will hold the SCL pin low when the CPU needs to respond
to the SSP interrupt (SSPIF bit is set and the CKP bit is cleared). The data that needs to be transmitted
will need to be written to the SSPBUF register, and then the CKP bit will need to be set to
allow the master to generate the required clocks.
19.4.2 Master Mode (Firmware)
Master mode of operation is supported by interrupt generation on the detection of the START and
STOP conditions. The STOP (P) and START (S) bits are cleared from a reset or when the SSP
module is disabled. Control of the I2C bus may be taken when the P bit is set, or the bus is idle
with both the S and P bits clear.
In master mode the SCL and SDA lines are manipulated by clearing the corresponding TRIS
bit(s). The output level is always low, irrespective of the value(s) in the PORT register. So when
transmitting data, a '1' data bit must have it’s TRIS bit set (input) and a '0' data bit must have it’s
TRIS bit cleared (output). The same scenario is true for the SCL line with the TRIS bit.
The following events will cause SSP Interrupt Flag bit, SSPIF, to be set (SSP Interrupt if enabled):
• START condition
• STOP condition
• Data transfer byte transmitted/received
Master mode of operation can be done with either the slave mode idle (SSPM3:SSPM0 = 1011)
or with the slave active (SSPM3:SSP0 = 1110 or 1111). When the slave modes are enabled, the
software needs to differentiate the source(s) of the interrupt.
19.4.3 Multi-Master Mode (Firmware)
In multi-Master mode, the interrupt generation on the detection of the START and STOP conditions
allows the determination of when the bus is free. The STOP (P) and START (S) bits are
cleared from a reset or when the SSP module is disabled. Control of the I2C bus may be taken
when the P bit (SSPSTAT<4>) is set, or the bus is idle with both the S and P bits clear. When the
bus is busy, enabling the SSP Interrupt will generate the interrupt when the STOP condition
occurs.
In Multi-Master operation, the SDA line must be monitored to see if the signal level is the
expected output level. This check only needs to be done when a high level is output. If a high
level is expected and a low level is present, the device needs to release the SDA and SCL lines
(set the TRIS bits). There are two stages where this arbitration can be lost, they are:
• Address transfer
• Data transfer
When the slave logic is enabled, the slave continues to receive. If arbitration was lost during the
address transfer stage, communication to the device may be in progress. If addressed an ACK
pulse will be generated. If arbitration was lost during the data transfer stage, the device will need
to retransfer the data at a later time.
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Section 19. SSP
SSP
19
19.4.4 Sleep Operation
While in sleep mode, the I2C module can receive addresses or data, and when an address match
or complete byte transfer occurs wake the processor from sleep (if the SSP interrupt is enabled).
19.4.5 Effect of a Reset
A reset disables the SSP module and terminates the current transfer.
Table 19-3: Registers Associated with I
2C Operation
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR,
BOR
Value on all
other resets
INTCON GIE/
GIEH
PEIE/
GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIR SSPIF (1) 0 0
IPR SSPIP (1) 0 0
SSPBUF Synchronous Serial Port Receive Buffer/Transmit Register xxxx xxxx uuuu uuuu
SSPADD Synchronous Serial Port (I2C mode) Address Register 0000 0000 0000 0000
SSPCON WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0 0000 0000 0000 0000
SSPSTAT SMP CKE D/A P S R/W UA BF 0000 0000 0000 0000
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'.
Shaded cells are not used by SSP in I2C mode.
Note 1: The positions of these bits are device dependent.
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DS39519A-page 19-28 2000 Microchip Technology Inc.
19.5 Initialization
Example 19-2: SPI Master Mode Initialization
CLRF SSPSTAT ; SMP = 0, CKE = 0, and clear status bits
BSF SSPSTAT, CKE ; CKE = 1
MOVLW 0x31 ; Set up SPI port, Master mode, CLK/16,
MOVWF SSPCON ; Data xmit on falling edge (CKE=1 & CKP=1)
; Data sampled in middle (SMP=0 & Master mode)
BSF PIE, SSPIE ; Enable SSP interrupt
BSF INTCON, GIE ; Enable, enabled interrupts
MOVLW DataByte ; Data to be Transmitted
; Could move data from RAM location
MOVWF SSPBUF ; Start Transmission
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2000 Microchip Technology Inc. DS39519A-page 19-29
Section 19. SSP
SSP
19
19.5.1 SSP Module / Basic SSP Module Compatibility
When upgrading from the Mid-Range family’s basic SSP module, the SSPSTAT register contains
two additional control bits. These bits are used only in SPI mode and are:
• SMP, SPI data input sample phase
• CKE, SPI Clock Edge Select
To be compatible with the SPI of the basic SSP module, these bits must be appropriately configured.
If these bits are not at the states shown in Table 19-4, improper SPI communication may
occur.
Table 19-4: New Bit States for Compatibility
Mid-Range Family’s
Basic SSP Module SSP Module
CKP CKP CKE SMP
1 100
0 000
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DS39519A-page 19-30 2000 Microchip Technology Inc.
19.6 Design Tips
Question 1: Using SPI mode, I do not seem able to talk to an SPI device.
Answer 1:
Ensure that you are using the correct SPI mode for that device. This SPI supports all four SPI
modes so you should be able to get it to function. Check the clock polarity and the clock phase.
These settings should match what the SPI is interfacing to.
Question 2: Using I2C mode, I do not seem able to make the master mode work.
Answer 2:
This SSP module does not have master mode fully automated in hardware, see Application Note
AN578 for software which uses the SSP module to implement master mode. If you require a fully
automated hardware implementation of I2C Master Mode, please refer to the Microchip Line Card
for devices that have the Master SSP module.
Question 3: Using I2C mode, I write data to the SSPBUF register, but the data did not
transmit.
Answer 3:
Ensure that you set the CKP bit to release the I2C clock.
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2000 Microchip Technology Inc. DS39519A-page 19-31
Section 19. SSP
SSP
19
19.7 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced MCU family (that is they may be written
for the Base-Line, Mid-Range or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to the
SSP Module are:
Title Application Note #
Use of the SSP Module in the I 2C Multi-Master Environment. AN578
Using Microchip 93 Series Serial EEPROMs with Microcontroller SPI Ports AN613
Software Implementation of I2C Bus Master AN554
Use of the SSP module in the Multi-master Environment AN578
Interfacing PIC16C64/74 to Microchip SPI Serial EEPROM AN647
Interfacing a Microchip PIC16C92x to Microchip SPI Serial EEPROM AN668
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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DS39519A-page 19-32 2000 Microchip Technology Inc.
19.8 Revision History
Revision A
This is the initial released revision of the SSP module description.
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2000 Microchip Technology Inc. DS39520A-page 20-1
Master SSP
20
Section 20. Master SSP
HIGHLIGHTS
This section of the manual contains the following major topics:
20.1 Introduction .................................................................................................................. 20-2
20.2 Control Registers ......................................................................................................... 20-4
20.3 SPI Mode ..................................................................................................................... 20-9
20.4 MSSP I2C Operation ................................................................................................. 20-17
20.5 Design Tips ................................................................................................................ 20-55
20.6 Related Application Notes.......................................................................................... 20-56
20.7 Revision History ......................................................................................................... 20-57
I
2C is a trademark of Philips
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DS39520A-page 20-2 2000 Microchip Technology Inc.
20.1 Introduction
The Master Synchronous Serial Port (MSSP) module is a serial interface useful for communicating
with other peripheral or microcontroller devices. These peripheral devices may be serial
EEPROMs, Shift Registers, display drivers, A/D converters, etc. The MSSP module can operate
in one of two modes:
• Serial Peripheral Interface (SPI)
• Inter-Integrated Circuit (I2C)
- Full Master Mode
- Slave Mode (with general address call)
The I2C interface supports the following modes in hardware:
• Master Mode
• Multi-Master Mode
• Slave Mode
Figure 20-1 shows a block diagram for the SPI Mode, while Figure 20-2 and Figure 20-3 show
the block diagrams for the two different I2C Modes of operation.
Figure 20-1: SPI Mode Block Diagram
Read Write
Internal
Data Bus
SSPSR Reg
SSPBUF Reg
SSPM3:SSPM0
bit0 Shift Clock
SS Control
Enable
Edge
Select
Clock Select
TMR2 Output
Prescaler TOSC
4, 16, 64
2
Edge
Select
2
4
Data to TX/RX in SSPSR
TRIS Bit
2
SMP:CKE
SDI
SDO
SS
SCK
( )
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Section 20. Master SSP
Master SSP
20
Figure 20-2: I2C Slave Mode Block Diagram
Figure 20-3: I2C Master Mode Block Diagram
Read Write
SSPSR Reg
Match Detect
SSPADD Reg
Start and
Stop Bit Detect
SSPBUF Reg
Internal
Data Bus
Address Match or
Set, Reset
S, P Bits
(SSPSTAT Reg)
SCL
Shift
Clock
SDA MSb LSb
General Call Detected
Read Write
SSPSR
Start Bit, Stop Bit,
SSPBUF
Internal
Data Bus
Set/Reset, S, P, WCOL (SSPSTAT)
Shift
Clock
MSb LSb
SDA
Acknowledge
Generate
SCL
SCL in
Bus Collision
SDA in Receive Enable
Clock Cntl
Clock Arbitrate/WCOL Detect
(Hold Off Clock Source)
SSPADD<6:0>
Baud
Set SSPIF, BCLIF
Reset ACKSTAT, PEN (SSPCON2)
Rate
Generator
SSPM3:SSPM0
Start Bit Detect
Stop Bit Detect
Write Collision Detect
Clock Arbitration
State Counter for
End of XMIT/RCV
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DS39520A-page 20-4 2000 Microchip Technology Inc.
20.2 Control Registers
The Master SSP (MSSP) module has three registers that control the operation and indicate the
status of the module. These are the SSPSTAT register (Register 20-1), the SSPCON1register
(Register 20-2), and the SSPCON2 register (Register 20-3).
Register 20-1: SSPSTAT: MSSP Status Register
R/W-0 R/W-0 R-0 R-0 R-0 R-0 R-0 R-0
SMP CKE D/A P S R/W UA BF
bit 7 bit 0
bit 7 SMP: Sample bit
SPI Master Mode
1 = Input data sampled at end of data output time
0 = Input data sampled at middle of data output time
SPI Slave Mode
SMP must be cleared when SPI is used in Slave Mode
In I2C Master or Slave Mode:
1= Slew rate control disabled for standard speed mode (100 kHz and 1 MHz)
0= Slew rate control enabled for high speed mode (400 kHz)
bit 6 CKE: SPI Clock Edge Select
CKP = 0
1 = Data transmitted on rising edge of SCK
0 = Data transmitted on falling edge of SCK
CKP = 1
1 = Data transmitted on falling edge of SCK
0 = Data transmitted on rising edge of SCK
bit 5 D/A: Data/Address bit (I2C Mode only)
1 = Indicates that the last byte received or transmitted was data
0 = Indicates that the last byte received or transmitted was address
bit 4 P: Stop bit
(I2C Mode only. This bit is cleared when the MSSP module is disabled, SSPEN is cleared)
1 = Indicates that a Stop bit has been detected last (this bit is '0' on RESET)
0 = Stop bit was not detected last
bit 3 S: Start bit
(I2C Mode only. This bit is cleared when the MSSP module is disabled, SSPEN is cleared)
1 = Indicates that a Start bit has been detected last (this bit is '0' on RESET)
0 = Start bit was not detected last
bit 2 R/W: Read/Write bit information (I2C Mode only)
This bit holds the R/W bit information following the last address match. This bit is only valid from
the address match to the next Start bit, Stop bit, or not ACK bit.
In I
2C Slave Mode:
1 = Read
0 = Write
In I
2C Master Mode:
1 = Transmit is in progress
0 = Transmit is not in progress.
Or’ing this bit with SEN, RSEN, PEN, RCEN, or ACKEN will indicate if the MSSP is
in idle Mode.
bit 1 UA: Update Address (10-bit I2C mode only)
1 = Indicates that the user needs to update the address in the SSPADD Register
0 = Address does not need to be updated
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Section 20. Master SSP
Master SSP
20
bit 0 BF: Buffer Full Status bit
Receive (SPI and I
2C Modes)
1 = Receive complete, SSPBUF is full
0 = Receive not complete, SSPBUF is empty
Transmit (I
2C Mode only)
1 = Data transmit in progress (does not include the ACK and Stop bits), SSPBUF is full
0 = Data transmit complete (does not include the ACK and Stop bits), SSPBUF is empty
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleard x = bit is unknown
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DS39520A-page 20-6 2000 Microchip Technology Inc.
Register 20-2: SSPCON1: MSSP Control Register1
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0
bit 7 bit 0
bit 7 WCOL: Write Collision Detect bit
Master Mode:
1 = A write to the SSPBUF Register was attempted while the I2C conditions were not valid for a
transmission to be started
0 = No collision
Slave Mode:
1 = The SSPBUF Register is written while it is still transmitting the previous word
(must be cleared in software)
0 = No collision
bit 6 SSPOV: Receive Overflow Indicator bit
In SPI Mode:
1 = A new byte is received while the SSPBUF Register is still holding the previous data. In case
of overflow, the data in SSPSR is lost. Overflow can only occur in Slave Mode. In Slave
Mode, the user must read the SSPBUF, even if only transmitting data, to avoid setting overflow.
In Master Mode the overflow bit is not set since each new reception (and transmission)
is initiated by writing to the SSPBUF Register. (Must be cleared in software)
0 = No overflow
In I2C Mode:
1 = A byte is received while the SSPBUF Register is still holding the previous byte. SSPOV is
a "don’t care" in transmit mode. (Must be cleared in software)
0 = No overflow
bit 5 SSPEN: Synchronous Serial Port Enable bit
In both modes, when enabled, the I/O pins must be properly configured as input or output.
In SPI Mode:
1 = Enables serial port and configures SCK, SDO, SDI, and SS as the source of the serial
port pins
0 = Disables serial port and configures these pins as I/O port pins
In I
2C Mode:
1 = Enables the serial port and configures the SDA and SCL pins as the source of the
serial port pins
0 = Disables serial port and configures these pins as I/O port pins
bit 4 CKP: Clock Polarity Select bit
In SPI Mode:
1 = Idle state for clock is a high level
0 = Idle state for clock is a low level
In I
2C Slave Mode:
SCK release control
1 = Enable clock
0 = Holds clock low (clock stretch) (Used to ensure data setup time)
In I
2C Master Mode
Unused in this mode
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Section 20. Master SSP
Master SSP
20
bit 3 - 0 SSPM3:SSPM0: Synchronous Serial Port Mode Select bits
0000 = SPI Master Mode, clock = FOSC/4
0001 = SPI Master Mode, clock = FOSC/16
0010 = SPI Master Mode, clock = FOSC/64
0011 = SPI Master Mode, clock = TMR2 output/2
0100 = SPI Slave Mode, clock = SCK pin. SS pin control enabled.
0101 = SPI Slave Mode, clock = SCK pin. SS pin control disabled. SS can be used as I/O pin
0110 = I2C Slave Mode, 7-bit address
0111 = I2C Slave Mode, 10-bit address
1000 = I2C Master Mode, clock = FOSC / (4 * (SSPADD+1) )
1001 = Reserved
1010 = Reserved
1011 = I2C firmware controlled master mode (Slave idle)
1100 = Reserved
1101 = Reserved
1110 = I2C Slave Mode, 7-bit address with Start and Stop bit interrupts enabled
1111 = I2C Slave Mode, 10-bit address with Start and Stop bit interrupts enabled
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleard x = bit is unknown
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DS39520A-page 20-8 2000 Microchip Technology Inc.
Register 20-3: SSPCON2: MSSP Control Register2
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
GCEN ACKSTAT ACKDT ACKEN RCEN PEN RSEN SEN
bit 7 bit 0
bit 7 GCEN: General Call Enable bit (In I2C Slave Mode only)
1 = Enable interrupt when a general call address (0000h) is received in the SSPSR
0 = General call address disabled
bit 6 ACKSTAT: Acknowledge Status bit (In I2C Master Mode only)
In Master Transmit Mode:
1 = Acknowledge was not received from slave
0 = Acknowledge was received from slave
bit 5 ACKDT: Acknowledge Data bit (In I2C Master Mode only)
In Master Receive Mode:
Value that will be transmitted when the user initiates an Acknowledge sequence at the end of a
receive.
1 = Not Acknowledge
0 = Acknowledge
bit 4 ACKEN: Acknowledge Sequence Enable bit (In I2C Master Mode only)
In Master Receive Mode:
1 = Initiate Acknowledge sequence on SDA and SCL pins, and transmit ACKDT data bit.
Automatically cleared by hardware.
0 = Acknowledge sequence idle
bit 3 RCEN: Receive Enable bit (In I2C Master Mode only)
1 = Enables Receive mode for I2C
0 = Receive idle
bit 2 PEN: Stop condition enable bit (In I2C Master Mode only)
SCK release control
1 = Initiate Stop condition on SDA and SCL pins. Automatically cleared by hardware.
0 = Stop condition idle
bit 1 RSEN: Repeated Start condition enabled bit (In I2C Master Mode only)
1 = Initiate Repeated Start condition on SDA and SCL pins. Automatically cleared by hardware.
0 = Repeated Start condition idle.
bit 0 SEN: Start condition enabled bit (In I2C Master Mode only)
1 = Initiate Start condition on SDA and SCL pins. Automatically cleared by hardware.
0 = Start condition idle
Note: For the ACKEN, RCEN, PEN, RSEN, SEN bits: If the I2C module is not in the idle
mode, the bit may not be set (no spooling) and the SSPBUF may not be written
(writes to the SSPBUF are disabled).
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleard x = bit is unknown
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Section 20. Master SSP
Master SSP
20
20.3 SPI Mode
The SPI mode allows 8 bits of data to be synchronously transmitted and received simultaneously.
All four modes of SPI are supported. To accomplish communication, typically three pins are used:
• Serial Data Out (SDO)
• Serial Data In (SDI)
• Serial Clock (SCK)
Additionally a fourth pin may be used when in a Slave Mode of operation:
• Slave Select (SS)
20.3.1 Operation
When initializing the SPI, several options need to be specified. This is done by programming the
appropriate control bits (SSPCON1<5:0>) and SSPSTAT<7:6>. These control bits allow the following
to be specified:
• Master Mode (SCK is the clock output)
• Slave Mode (SCK is the clock input)
• Clock Polarity (Idle state of SCK)
• Data input sample phase (middle or end of data output time)
• Clock edge (output data on rising/falling edge of SCK)
• Clock Rate (Master Mode only)
• Slave Select Mode (Slave Mode only)
Figure 20-4 shows the block diagram of the MSSP module, when in SPI mode.
Figure 20-4: MSSP Block Diagram (SPI Mode)
Read Write
Internal
Data Bus
SSPSR Reg
SSPBUF Reg
SSPM3:SSPM0
bit0 Shift
Clock
SS Control
Enable
Edge
Select
Clock Select
TMR2 Output
Prescaler TOSC
4, 16, 64
2
Edge
Select
2
4
Data to TX/RX in SSPSR
TRIS bit
2
SMP:CKE
SDI
SDO
SS
SCK
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DS39520A-page 20-10 2000 Microchip Technology Inc.
The MSSP consists of a transmit/receive Shift Register (SSPSR) and a Buffer Register
(SSPBUF). The SSPSR shifts the data in and out of the device, MSb first. The SSPBUF holds
the data that was written to the SSPSR, until the received data is ready. Once the 8 bits of data
have been received, that byte is moved to the SSPBUF Register. Then the buffer full detect bit,
BF (SSPSTAT register), and the interrupt flag bit, SSPIF, are set. This double buffering of the
received data (SSPBUF) allows the next byte to start reception before reading the data that was
just received. Any write to the SSPBUF Register during transmission/reception of data will be
ignored, and the write collision detect bit, WCOL (SSPCON1 register), will be set. User software
must clear the WCOL bit so that it can be determined if the following write(s) to the SSPBUF
Register completed successfully.
When the application software is expecting to receive valid data, the SSPBUF should be read
before the next byte of data to transfer is written to the SSPBUF. Buffer full bit, BF (SSPSTAT
register), indicates when SSPBUF has been loaded with the received data (transmission is
complete). When the SSPBUF is read, the BF bit is cleared. This data may be irrelevant if the
SPI is only a transmitter. Generally the MSSP Interrupt is used to determine when the transmission/reception
has completed. The SSPBUF must be read and/or written. If the interrupt method
is not going to be used, then software polling can be done to ensure that a write collision does
not occur. Example 20-1 shows the loading of the SSPBUF (SSPSR) for data transmission.
Example 20-1:Loading the SSPBUF (SSPSR) Register
The SSPSR is not directly readable or writable, and can only be accessed by addressing the
SSPBUF Register. Additionally, the MSSP Status Register (SSPSTAT) indicates the various status
conditions.
LOOP BTFSS SSPSTAT, BF ;Has data been received (transmit complete)?
GOTO LOOP ;No
MOVF SSPBUF, W ;WREG reg = contents of SSPBUF
MOVWF RXDATA ;Save in user RAM, if data is meaningful
MOVF TXDATA, W ;W reg = contents of TXDATA
MOVWF SSPBUF ;New data to xmit
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Section 20. Master SSP
Master SSP
20
20.3.2 Enabling SPI I/O
To enable the serial port, SSP Enable bit, SSPEN, must be set. To reset or reconfigure SPI mode,
clear the SSPEN bit, re-initialize the SSPCON Registers, and then set the SSPEN bit. This configures
the SDI, SDO, SCK, and SS pins as serial port pins. For the pins to behave as the serial
port function, some must have their data direction bits (in the TRIS Register) appropriately programmed.
That is:
• SDI is automatically controlled by the SPI module
• SDO must have the TRIS bit cleared
• SCK (Master Mode) must have the TRIS bit cleared
• SCK (Slave Mode) must have the TRIS bit set
• SS must have the TRIS bit set
Any serial port function that is not desired may be overridden by programming the corresponding
data direction (TRIS) Register to the opposite value.
20.3.3 Typical Connection
Figure 20-5 shows a typical connection between two microcontrollers. The master controller
(Processor 1) initiates the data transfer by sending the SCK signal. Data is shifted out of both
Shift Registers on their programmed clock edge, and latched on the opposite edge of the clock.
Both processors should be programmed to same Clock Polarity (CKP), then both controllers
would send and receive data at the same time. Whether the data is meaningful (or dummy data)
depends on the application software. This leads to three scenarios for data transmission:
• Master sends data — Slave sends dummy data
• Master sends data — Slave sends data
• Master sends dummy data — Slave sends data
Figure 20-5:SPI Master/Slave Connection
Serial Input Buffer
(SSPBUF)
Shift Register
(SSPSR)
MSb LSb
SDO
SDI
PROCESSOR 1
SCK
SPI Master SSPM3:SSPM0 = 00xxb
Serial Input Buffer
(SSPBUF)
Shift Register
(SSPSR)
MSb LSb
SDI
SDO
PROCESSOR 2
SCK
SPI Slave SSPM3:SSPM0 = 010xb
Serial Clock
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DS39520A-page 20-12 2000 Microchip Technology Inc.
20.3.4 SPI Master Mode
The master can initiate the data transfer at any time because it controls the SCK. The master
determines when the slave (Processor 2, Figure 20-5) is to broadcast data by the software protocol.
In Master Mode, the data is transmitted/received as soon as the SSPBUF Register is written to.
If the SPI is only going to receive, the SDO output could be disabled (programmed as an input).
The SSPSR Register will continue to shift in the signal present on the SDI pin at the programmed
clock rate. As each byte is received, it will be loaded into the SSPBUF Register (interrupts and
status bits appropriately set). This could be useful in receiver applications as a “line activity monitor”
mode.
The clock polarity is selected by appropriately programming the CKP bit. This gives waveforms
for SPI communication as shown in Figure 20-6, Figure 20-8, and Figure 20-9 where the Msb is
transmitted first. In Master Mode, the SPI clock rate (bit rate) is user programmable to be one of
the following:
• FOSC/4 (or TCY)
• FOSC/16 (or 4 • TCY)
• FOSC/64 (or 16 • TCY)
• Timer2 output/2
This allows a maximum data rate (at 40 MHz) of 10.00 Mbps.
Figure 20-6 shows the waveforms for Master Mode. When the CKE bit is set, the SDO data is
valid before there is a clock edge on SCK. The change of the input sample is shown based on
the state of the SMP bit. The time when the SSPBUF is loaded with the received data is shown.
Figure 20-6:SPI Mode Waveform (Master Mode)
SCK
(CKP = 0
SCK
(CKP = 1
SCK
(CKP = 0
SCK
(CKP = 1
4 clock
modes
Input
Sample
Input
Sample
SDI
bit7 bit0
SDO bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
bit7 bit0
SDI
SSPIF
(SMP = 1)
(SMP = 0)
(SMP = 1)
CKE = 1)
CKE = 0)
CKE = 1)
CKE = 0)
(SMP = 0)
Write to
SSPBUF
SSPSR to
SSPBUF
SDO bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
(CKE = 0)
(CKE = 1)
Next Q4 cycle
after Q2↓
39500 18C Reference Manual.book Page 12 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39520A-page 20-13
Section 20. Master SSP
Master SSP
20
20.3.5 SPI Slave Mode
In Slave Mode, the data is transmitted and received as the external clock pulses appear on SCK.
When the last bit is latched, the SSPIF interrupt flag bit is set.
While in Slave Mode, the external clock is supplied by the external clock source on the SCK pin.
This external clock must meet the minimum high and low times as specified in the electrical specifications.
While in sleep mode, the slave can transmit/receive data. When a byte is received, the device
will wake-up from sleep.
20.3.6 Slave Select Synchronization
The SS pin is a Slave Select pin, and functions similar to a chip select pin. The SPI must
be in Slave Mode with SS pin control enabled (SSPCON1<3:0> = 04h). The pin must be configured
as an input by setting the corresponding TRIS bit. When the SS pin is low, transmission
and reception are enabled and the SDO pin is driven. When the SS pin goes high,
the SDO pin is no longer driven, even if in the middle of a transmitted byte, and becomes
a floating output. External pull-up/ pull-down resistors may be desirable, depending on the
application.
If the TRIS bit is cleared, making the pin an output, and the pin outputs a high , the SPI
receive logic (slave mode) will be in reset. It will remain in reset until either the pin outputs
a low, or the pin’s TRIS bit is set and external circuits pull the pin low.
When the SPI module resets, the bit counter is forced to 0. This can be done by either by forcing
the SS pin to a high level or clearing the SSPEN bit.
To emulate two-wire communication, the SDO pin can be connected to the SDI pin. When the
SPI needs to operate as a receiver, the SDO pin can be configured as an input. This disables
transmissions from the SDO. The SDI can always be left as an input (SDI function) since it cannot
create a bus conflict.
Note 1: When the SPI is in Slave Mode with SS pin control enabled, (SSPCON<3:0> =
0100) the SPI module will reset if the SS pin is set to VDD.
Note 2: If the SPI is used in Slave Mode with CKE set, then the SS pin control must be
enabled.
39500 18C Reference Manual.book Page 13 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39520A-page 20-14 2000 Microchip Technology Inc.
Figure 20-7:Slave Synchronization Waveform
Figure 20-8:SPI Slave Mode Waveform (CKE = 0)
bit7
bit7 bit6 bit7 bit0
bit7
bit0
Next Q4 cycle
after Q2Ø
SS
SCK
(CKP = 0)
(CKE = 0)
SCK
(CKP = 1)
(CKE = 0)
Write to
SSPBUF
SDI
(SMP = 0)
Input
Sample
(SMP = 0)
SSPIF
Interrupt
Flag
SSPSR to
SSPBUF
SDO
bit7 bit0
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
Next Q4 cycle
after Q2Ø
SS
SCK
(CKP = 0)
(CKE = 0)
SCK
(CKP = 1)
(CKE = 0)
Write to
SSPBUF
SDI
(SMP = 0)
Input
Sample
(SMP = 0)
SSPIF
Interrupt
Flag
SSPSR to
SSPBUF
SDO
39500 18C Reference Manual.book Page 14 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39520A-page 20-15
Section 20. Master SSP
Master SSP
20
Figure 20-9:SPI Slave Mode Waveform (CKE = 1)
SCK
(CKP = 1)
SCK
(KP = 0)
Input
Sample
SDI
bit7 bit0
SDO bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
SSPIF
Interrupt
(SMP = 0)
(SMP = 0)
Write to
SSPBUF
SSPSR to
SSPBUF
SS
Flag
required
Next Q4 cycle
after Q2Ø
39500 18C Reference Manual.book Page 15 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39520A-page 20-16 2000 Microchip Technology Inc.
20.3.7 Sleep Operation
In Master Mode, when the SLEEP instruction is executed, all module clocks are halted. The transmission/reception
that is in progress will remain in the current state until the device wakes from
sleep. After the device returns to normal mode, the module will continue to transmit/receive data.
In Slave Mode, the SPI transmit/receive Shift Register operates asynchronously to the device.
This allows the device to be placed in sleep mode, and data to be shifted into the SPI transmit/receive
Shift Register. When all 8 bits have been received, the MSSP interrupt flag bit will be
set. If the SSPIF is enabled, it will wake the device from sleep.
20.3.8 Effects of a Reset
A reset disables the MSSP module and terminates the current transfer.
20.3.9 Bus Mode Compatibility
Table 20-1 shows the compatibility between the standard SPI modes and the states of the CKP
and CKE control bits.
Table 20-1: SPI Bus Modes
There is also a SMP bit that controls when the data is sampled.
Table 20-2: Registers Associated with SPI Operation
Standard SPI Mode
Terminology
Control Bits State
CKP CKE
0, 0 0 1
0, 1 0 0
1, 0 1 1
1, 1 1 0
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR,
BOR
Value on
all other
resets
INTCON GIE/
GIEH
PEIE/
GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIR1 PSPIF (1) ADIF RCIF TXIF SSPIF CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
PIE1 PSPIE (1) ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
IPR1 PSPIP (1) ADIP RCIP TXIP SSPIP CCP1IP TMR2IP TMR1IP 0000 0000 0000 0000
TRISC PORTC Data Direction Register 1111 1111 1111 1111
SSPBUF Synchronous Serial Port Receive Buffer/Transmit Register xxxx xxxx uuuu uuuu
SSPCON WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0 0000 0000 0000 0000
TRISA — PORTA Data Direction Register --11 1111 --11 1111
SSPSTAT SMP CKE D/A P S R/W UA BF 0000 0000 0000 0000
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'.
Shaded cells are not used by the MSSP in SPI mode.
Note 1: The PSPIF, PSPIE and PSPIP bits are reserved on the PIC18C2X2 devices. Always maintain these bits clear.
39500 18C Reference Manual.book Page 16 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39520A-page 20-17
Section 20. Master SSP
Master SSP
20
20.4 MSSP I2C Operation
The MSSP module in I2C mode fully implements all master and slave functions (including general
call support) and provides interrupts on Start and Stop bits in hardware to determine a free
bus (multi-master function). The MSSP module implements the standard mode specifications as
well as 7-bit and 10-bit addressing. Appendix A gives an overview of the I2C bus specification.
A "glitch" filter is on the SCL and SDA pins when the pin is an input. This filter operates in both
the 100 kHz and 400 kHz modes. In the 100 kHz mode, when these pins are an output, there is
a slew rate control of the pin that is independent of device frequency.
Figure 20-10: I2C Slave Mode Block Diagram
Figure 20-11: I2C Master Mode Block Diagram
Read Write
SSPSR reg
Match detect
SSPADD reg
Start and
Stop bit detect
SSPBUF reg
Internal
Data Bus
Address Match
Set, Reset
S, P bits
(SSPSTAT reg)
SCL
shift
clock
SDA MSb LSb
Read Write
SSPSR reg
Match detect
SSPADD reg
Start and Stop bit
detect / generate
SSPBUF reg
Internal
Data Bus
Address Match
Set/Clear S bit
Clear/Set P bit
(SSPSTAT reg)
SCL
shift
clock
SDA MSb LSb
Baud Rate Generator
7
SSPADD<6:0>
and
and Set SSPIF
39500 18C Reference Manual.book Page 17 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39520A-page 20-18 2000 Microchip Technology Inc.
Two pins are used for data transfer. These are the SCL pin, which is the clock, and the SDA pin,
which is the data. The SDA and SCL pins must be configured as inputs in the corresponding
TRIS registers when the I2C mode is enabled. The MSSP module functions are enabled by setting
the MSSP Enable bit, SSPEN (SSPCON register).The MSSP module has six registers for
I
2C operation. They are the:
• MSSP Control Register1 (SSPCON1)
• MSSP Control Register2 (SSPCON2)
• MSSP Status Register (SSPSTAT)
• Serial Receive/Transmit Buffer (SSPBUF)
• MSSP Shift Register (SSPSR) - Not directly accessible
• MSSP Address Register (SSPADD)
The SSPCON1 Register allows control of the I2C operation. Four mode selection bits
(SSPCON1<3:0>) allow one of the following I2C modes to be selected:
• I2C Slave Mode (7-bit address)
• I2C Slave Mode (10-bit address)
• I2C Master Mode, clock = OSC/4 (SSPADD +1)
• I2C Slave Mode (7-bit address), with Start and Stop bit interrupts enabled
• I2C Slave Mode (10-bit address), with Start and Stop bit interrupts enabled
• I2C Firmware controlled master operation, slave is idle
Before selecting any I2C mode, the SCL and SDA pins must be programmed to inputs by setting
the appropriate TRIS bits. Selecting an I2C mode, by setting the SSPEN bit, enables the SCL
and SDA pins to be used as the clock and data lines in I2C mode.
The SSPSTAT Register gives the status of the data transfer. This information includes detection
of a Start or Stop bit, specifies if the received byte was data or address, if the next byte is the
completion of 10-bit address, and if this will be a read or write data transfer.
The SSPBUF is the register to which transfer data is written to or read from. The SSPSR Register
shifts the data in or out of the device. In receive operations, the SSPBUF and SSPSR create a
double buffered receiver. This allows reception of the next byte to begin before reading the current
byte of received data. When the complete byte is received, it is transferred to the SSPBUF
Register and the SSPIF bit is set. If another complete byte is received before the SSPBUF Register
is read, a receiver overflow has occurred and the SSPOV bit (SSPCON1 register) is set and
the byte in the SSPSR is lost.
The SSPADD Register holds the slave address. In 10-bit mode, the user needs to write the high
byte of the address (1111 0 A9 A8 0). Following the high byte address match, the low byte of
the address needs to be loaded (A7:A0).
39500 18C Reference Manual.book Page 18 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39520A-page 20-19
Section 20. Master SSP
Master SSP
20
20.4.1 Slave Mode
In Slave Mode, the SCL and SDA pins must be configured as inputs. The MSSP module will override
the input state with the output data when required (slave-transmitter).
When an address is matched or the data transfer after an address match is received, the hardware
automatically generates the acknowledge (ACK) pulse, and loads the SSPBUF Register
with the received value currently in the SSPSR Register.
There are certain conditions that will cause the MSSP module not to give this ACK pulse. These
are if either (or both):
a) The buffer full bit, BF (SSPSTAT register), was set before the transfer was received.
b) The overflow bit, SSPOV (SSPCON1 register), was set before the transfer was received.
If the BF bit is set, the SSPSR Register value is not loaded into the SSPBUF, but the SSPIF and
SSPOV bits are set. Table 20-3 shows what happens when a data transfer byte is received, given
the status of the BF and SSPOV bits. The shaded cells show the condition where user software
did not properly clear the overflow condition. The BF bit is cleared by reading the SSPBUF register
while bit SSPOV is cleared through software.
The SCL clock input must have a minimum high and low time for proper operation. The high and
low times of the I2C specification as well as the requirement of the MSSP module is shown in
timing parameters 100 and 101 of the “Electrical Specifications” section.
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PIC18C Reference Manual
DS39520A-page 20-20 2000 Microchip Technology Inc.
20.4.1.1 Addressing
Once the MSSP module has been enabled, it waits for a Start condition to occur. Following the
Start condition, the 8 bits are shifted into the SSPSR Register. All incoming bits are sampled with
the rising edge of the clock (SCL) line. The value of register SSPSR<7:1> is compared to the
value of the SSPADD Register (bits 7:1). The address is compared on the falling edge of the
eighth clock (SCL) pulse. If the addresses match, and the BF and SSPOV bits are clear, the following
events occur:
a) The SSPSR Register value is loaded into the SSPBUF Register on the falling edge of the
eighth SCL pulse.
b) The buffer full bit, BF, is set on the falling edge of the eighth SCL pulse.
c) An ACK pulse is generated.
d) MSSP interrupt flag bit, SSPIF, is set (interrupt is generated if enabled) - on the falling
edge of the ninth SCL pulse.
In 10-bit address mode, two address bytes need to be received by the slave. The five Most Significant
bits (MSbs) of the first address byte specify if this is a 10-bit address. The R/W bit
(SSPSTAT<2>) must specify a write so the slave device will receive the second address byte.
For a 10-bit address the first byte would equal ‘1111 0 A9 A8 0’, where A9 and A8 are the two
MSbs of the address. The sequence of events for a 10-bit address is as follows (with steps 7- 9
for a slave-transmitter):
1. Receive first (high) byte of the address (the SSPIF, BF, and UA (SSPSTAT register) bits
are set).
2. Update the SSPADD Register with second (low) byte of the address (clears the UA bit and
releases the SCL line).
3. Read the SSPBUF Register (clears the BF bit) and clear flag bit SSPIF.
4. Receive second (low) byte of the address (the SSPIF, BF, and UA bits are set).
5. Update the SSPADD Register with the first (high) byte of the address. This will clear the
UA bit and release the SCL line.
6. Read the SSPBUF Register (clears the BF bit) and clear the SSPIF flag bit.
7. Receive repeated Start condition.
8. Receive first (high) byte of the address (the SSPIF and BF bits are set).
9. Read the SSPBUF Register (clears the BF bit) and clear the SSPIF flag bit.
Table 20-3: Data Transfer Received Byte Actions
Note: Following the Repeated Start condition (step 7) in 10-bit mode, the user only needs
to match the first 7-bit address. The user does not update the SSPADD for the second
half of the address.
Status Bits as Data
Transfer is Received
SSPSR → SSPBUF
Generate ACK
Pulse
Set bit SSPIF
(SSP Interrupt occurs
BF SSPOV if enabled)
0 0 Yes Yes Yes
1 0 No No Yes
1 1 No No Yes
0 1 Yes No Yes
Note: Shaded cells show the conditions where the user software did not properly clear
the overflow condition
39500 18C Reference Manual.book Page 20 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39520A-page 20-21
Section 20. Master SSP
Master SSP
20
20.4.1.2 Slave Reception
When the R/W bit of the address byte is clear and an address match occurs, the R/W bit of the
SSPSTAT Register is cleared. The received address is loaded into the SSPBUF Register.
When the address byte overflow condition exists, then no acknowledge (ACK) pulse is given. An
overflow condition is defined as either the BF bit (SSPSTAT register) is set or the SSPOV bit
(SSPCON1 register) is set.
An MSSP interrupt is generated for each data transfer byte. The SSPIF flag bit must be cleared
in software. The SSPSTAT Register is used to determine the status of the received byte.
Note: The SSPBUF will be loaded if the SSPOV bit is set and the BF flag bit is cleared. If
a read of the SSPBUF was performed, but the user did not clear the state of the
SSPOV bit before the next receive occurred. The ACK is not sent and the SSPBUF
is updated.
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PIC18C Reference Manual
DS39520A-page 20-22 2000 Microchip Technology Inc.
20.4.1.3 Slave Transmission
When the R/W bit of the incoming address byte is set and an address match occurs, the R/W bit
of the SSPSTAT Register is set. The received address is loaded into the SSPBUF Register. The
ACK pulse will be sent on the ninth bit, and the SCL pin is held low. The transmit data must be
loaded into the SSPBUF Register, which also loads the SSPSR Register and sets the BF bit.
Then the SCL pin should be enabled by setting the CKP bit (SSPCON1 register). The master
should monitor the SCL pin prior to asserting another clock pulse. The slave devices may be
holding off the master by stretching the clock. The eight data bits are shifted out on the falling
edge of the SCL input. This ensures that the SDA signal is valid during the SCL high time
(Figure 20-13). When all eight bits have been shifted out, the BF bit will be cleared.
An MSSP interrupt is generated for each data transfer byte. The SSPIF flag bit must be cleared
in software, and the SSPSTAT Register is used to determine the status of the byte transfer. The
SSPIF flag bit is set on the falling edge of the ninth clock pulse.
As a slave-transmitter, the ACK pulse from the master-receiver is latched on the rising edge of
the ninth SCL input pulse. If the SDA line was high (not ACK), then the data transfer is complete.
When the not ACK is latched by the slave, the slave logic is reset and the slave then monitors
for another occurrence of the Start bit. If the SDA line was low (ACK), the transmit data must be
loaded into the SSPBUF Register, which also loads the SSPSR Register and sets the BF bit.
Then the SCL pin should be enabled by setting the CKP bit.
Figure 20-12: I
2C Slave Mode Waveforms for Reception (7-bit Address)
Figure 20-13: I2C Slave Mode Waveforms for Transmission (7-bit Address)
5 76 8 9 P
D6D7 D5 D3D4 D2 D1 D0
S
A7 A6 A5 A4 A3 A2 A1SDA
SCL 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 23 4
Bus Master
terminates
transfer
Bit SSPOV is set because the SSPBUF Register is still full.
Cleared in software
SSPBUF Register is read
Receiving Data ACK Receiving Data
D6D7 D5 D3D4 D2 D1 D0 ACK
R/W=0 Receiving Address
SSPIF
BF (SSPSTAT<0>)
SSPOV (SSPCON1<6>)
Not ACK
ACK is not sent.
SDA
SCL
SSPIF
BF (SSPSTAT<0>)
CKP (SSPCON1<4>)
A7 A6 A5 A4 A3 A2 A1 ACK D7 D6 D5 D4 D3 D2 D1 D0
Receiving Address R/W = 1 Transmitting Data Not ACK
123456789 1234 56789 P
Cleared in software
SSPBUF is written in software From MSSP interrupt
service routine
Set bit after writing to SSPBUF
S Data in
sampled
SCL held low
while CPU responds to SSPIF
(the SSPBUF must be written-to
before the CKP bit can be set)
R/W = 0
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2000 Microchip Technology Inc. DS39520A-page 20-23
Section 20. Master SSP
Master SSP
20
Figure 20-14:
I
2C Slave Mode Waveform (Transmission 10-bit Address) SDA SCL SSPIF BF (SSPSTAT<0>) S 123 45 6 78 9 1 2345 67 89 12 34 5 7 8 9 P 1 1 1 1 0 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 1 1 1 1 0 A8 R/W=1 ACK ACK R/W = 0 ACK Receive First Byte of Address Cleared in software Master sends NACK A96 (PIR1<3>) Receive Second Byte of Address Cleared by hardware when SSPADD is updated UA (SSPSTAT<1>) Clock is held low until update of SSPADD has taken place UA is set indicating that the SSPADD needs to be updated UA is set indicating that SSPADD needs to be
updated
Cleared by hardware when
SSPADD is updated
SSPBUF is written with
contents of SSPSR
Dummy read of SSPBUF to clear BF flag
Receive First Byte of Address
12345 78 9
D7 D6 D5 D4 D3 D1
ACK
D2
6
Transmitting Data Byte
D0
Dummy read of SSPBUF
to clear BF flag
Sr
Cleared in software
Write of SSPBUF
initiates transmit
Cleared in software
Transmit is complete
clock to be released
CKP has to be set for
Bus Master
terminates
transfer
39500 18C Reference Manual.book Page 23 Monday, July 10, 2000 6:12 PM
DS39520A-page 20-24
PIC18C Reference Manual
2000 Microchip Technology Inc.
Figure 20-15: I
2C Slave Mode Waveform (Reception 10-bit Address) SDA SCL SSPIF BF (SSPSTAT<0>) S 1 234 56 7 89 1 2345 67 89 1 2345 789 P 1 1 1 1 0 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D1 D0 Receive Data Byte ACK R/W = 0 ACK Receive First Byte of Address Cleared in software Bus Master terminates transfer D2 6 (PIR1<3>) Receive Second Byte of Address Cleared by hardware when SSPADD is updated with UA (SSPSTAT<1>) Clock is held low until update of SSPADD has taken place UA is set indicating that the SSPADD needs to be
updated UA is set indicating that
SSPADD needs to be
updated
SSPBUF is written with
contents of SSPSR Dummy read of SSPBUF to clear BF flag
ACK
R/W = 1
Cleared in software
Dummy read of SSPBUF to clear BF flag Read of SSPBUF clears BF flag
Cleared by hardware when
SSPADD is updated with low byte of address
high byte of address
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2000 Microchip Technology Inc. DS39520A-page 20-25
Section 20. Master SSP
Master SSP
20
20.4.2 General Call Address Support
The addressing procedure for the I2C bus is such that the first byte after the Start condition usually
determines which device will be the slave addressed by the master. The exception is the general
call address, which can address all devices. When this address is used, all devices should
respond with an acknowledge.
The general call address is one of eight addresses reserved for specific purposes by the I2C protocol.
It consists of all 0’s with R/W = 0.
The general call address is recognized when the General Call Enable bit (GCEN) is set. Following
a Start bit detect, 8 bits are shifted into the SSPSR and the address is compared against the
SSPADD, and is also compared to the general call address, fixed in hardware.
If the general call address matches, the SSPSR is transferred to the SSPBUF, the BF flag bit is
set (during the eighth bit), and on the falling edge of the ninth bit (the ACK bit) the SSPIF interrupt
flag bit is set.
When the interrupt is serviced. The source for the interrupt can be checked by reading the contents
of the SSPBUF to determine if the address was device specific or a general call address.
In 10-bit address mode, SSPADD must be updated for the second half of the address to match
and the UA bit to be set.
If the general call address is sampled when the GCEN bit is set, then the second half of the
address is not necessary. The UA bit will not be set, and the slave (configured in 10-bit address
mode) will begin receiving data after the acknowledge (Figure 20-16).
Figure 20-16: Slave Mode General Call Address Sequence (7 or 10-bit Address Mode)
SDA
SCL
S
SSPIF
BF (SSPSTAT<0>)
SSPOV (SSPCON1<6>)
Cleared in software
SSPBUF is read
R/W = 0
ACK General Call Address
Address is compared to General Call Address
GCEN (SSPCON2<7>)
Receiving data ACK
1 2 34 56 78 91 2 34 56 789
D7 D6 D5 D4 D3 D2 D1 D0
after ACK, set interrupt
'0'
'1'
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PIC18C Reference Manual
DS39520A-page 20-26 2000 Microchip Technology Inc.
20.4.3 Sleep Operation
While in sleep mode, the I2C module can receive addresses or data. When an address match or
complete byte transfer occurs, the processor will wake-up from sleep (if the MSSP interrupt is
enabled).
20.4.4 Effect of a Reset
A reset disables the MSSP module and terminates the current transfer.
Table 20-4: Registers Associated with I2C Operation
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR,
BOR
Value on all
other resets
INTCON GIE/
GIEH
PEIE/
GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIR SSPIF, BCLIF (1) 0, 0 0, 0
PIE SSPIE, BCLIF (1) 0, 0 0, 0
SSPADD Synchronous Serial Port (I2C mode)
Address Register (Slave Mode)/Baud Rate Generator (Master Mode) 0000 0000 0000 0000
SSPBUF Synchronous Serial Port Receive Buffer/Transmit Register xxxx xxxx uuuu uuuu
SSPCON1 WCOL SSPOV SSPEN CKP SSPM3 SSPM2 SSPM1 SSPM0 0000 0000 0000 0000
SSPCON2 GCEN ACKSTAT ACKDT ACKEN RCEN PEN RSEN SEN 0000 0000 0000 0000
SSPSTAT SMP CKE D/A P S R/W UA BF 0000 0000 0000 0000
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'.
Shaded cells are not used by the MSSP in I2C mode.
Note 1: The position of these bits is device dependent.
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2000 Microchip Technology Inc. DS39520A-page 20-27
Section 20. Master SSP
Master SSP
20
20.4.5 Master Mode
Master Mode of operation is supported by interrupt generation on the detection of the Start and
Stop conditions. The Stop (P) and Start (S) bits are cleared when a reset occurs or when the
MSSP module is disabled. Control of the I2C bus may be taken when the P bit is set, or the bus
is idle with both the S and P bits clear.
In Master Mode, the SCL and SDA lines are manipulated by the MSSP hardware.
The following events will cause SSP Interrupt Flag bit, SSPIF, to be set (SSP Interrupt if enabled):
• Start condition
• Stop condition
• Data transfer byte transmitted/received
• Acknowledge Transmit
• Repeated Start
Figure 20-17: MSSP Block Diagram (I
2C Master Mode)
Read Write
SSPSR
Start Bit, Stop Bit,
Start Bit Detect
SSPBUF
Internal
Data Bus
Set/Reset, S, P, WCOL (SSPSTAT)
Shift
Clock
MSb LSb
SDA
Acknowledge
Generate
Stop Bit Detect
Write Collision Detect
Clock Arbitration
State Counter for
End of XMIT/RCV
SCL
SCL In
Bus Collision
SDA In Receive Enable
Clock Cntl
Clock Arbitrate/WCOLDetect
(Hold Off Clock Source)
SSPADD<6:0>
Baud
Set SSPIF, BCLIF
Reset ACKSTAT, PEN (SSPCON2)
Rate
Generator
SSPM3:SSPM0
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DS39520A-page 20-28 2000 Microchip Technology Inc.
20.4.6 Multi-Master Mode
In Multi-Master Mode, the interrupt generation on the detection of the Start and Stop conditions
allows the determination of when the bus is free. The Stop (P) and Start (S) bits are cleared from
a reset or when the MSSP module is disabled. Control of the I2C bus may be taken when the P
bit (SSPSTAT register) is set, or the bus is idle with both the S and P bits clear. When the bus is
busy, enabling the MSSP Interrupt will generate the interrupt when the Stop condition occurs.
In multi-master operation, the SDA line must be monitored, for arbitration, to see if the signal level
is the expected output level. This check is performed in hardware, with the result placed in the
BCLIF bit.
The states where arbitration can be lost are:
• Address transfer
• Data transfer
• A Start condition
• A Repeated Start condition
• An Acknowledge condition
20.4.7 I2C Master Mode Support
Master Mode is enabled by setting and clearing the appropriate SSPM bits in SSPCON1 and by
setting the SSPEN bit. Once Master Mode is enabled, the user has six options.
1. Assert a Start condition on SDA and SCL.
2. Assert a Repeated Start condition on SDA and SCL.
3. Write to the SSPBUF Register initiating transmission of data/address.
4. Generate a Stop condition on SDA and SCL.
5. Configure the I2C port to receive data.
6. Generate an acknowledge condition at the end of a received byte of data.
Note: The MSSP Module when configured in I2C Master Mode does not allow queueing of
events. For instance: The user is not allowed to initiate a Start condition, and immediately
write the SSPBUF Register to imitate transmission before the Start condition
is complete. In this case the SSPBUF will not be written to, and the WCOL bit will be
set, indicating that this write to the SSPBUF did not occur.
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Section 20. Master SSP
Master SSP
20
20.4.7.1 I2
C Master Mode Operation
The master device generates all of the serial clock pulses and the Start and Stop conditions. A
transfer is ended with a Stop condition or with a Repeated Start condition. Since the Repeated
Start condition is also the beginning of the next serial transfer, the I2C bus will not be released.
In master transmitter mode, serial data is output through SDA, while SCL outputs the serial clock.
The first byte transmitted contains the slave address of the receiving device (7 bits), and the
Read/Write (R/W) bit. In this case, the R/W bit will be logic '0'. Serial data is transmitted 8 bits at
a time. After each byte is transmitted, an Acknowledge bit is received. Start and Stop conditions
are output to indicate the beginning and the end of a serial transfer.
In master receive mode, the first byte transmitted contains the slave address of the transmitting
device (7 bits), and the R/W bit. In this case, the R/W bit will be logic '1'. Thus, the first byte transmitted
is a 7-bit slave address followed by a '1' to indicate receive bit. Serial data is received via
the SDA pin, while the SCL pin outputs the serial clock. Serial data is received 8 bits at a time.
After each byte is received, an Acknowledge bit is transmitted. Start and Stop conditions indicate
the beginning and end of transmission.
The baud rate generator used for SPI mode operation is now used to set the SCL clock frequency
for either 100 kHz, 400 kHz, or 1 MHz I2C operation. The baud rate generator reload value is
contained in the lower 7 bits of the SSPADD Register. The baud rate generator will automatically
begin counting on a write to the SSPBUF. Once the given operation is complete (i.e., transmission
of the last data bit is followed by ACK), the internal clock will automatically stop counting and
the SCL pin will remain in its last state.
A typical transmit sequence would go as follows:
a) The user generates a Start condition by setting the Start enable bit, SEN (SSPCON2 register).
b) SSPIF is set. The MSSP module will wait the required start time before any other operation
takes place.
c) The user loads the SSPBUF with the address to transmit.
d) Address is shifted out the SDA pin until all 8 bits are transmitted.
e) The MSSP module shifts in the ACK bit from the slave device, and writes its value into the
SSPCON2 Register (SSPCON2 register).
f) The MSSP module generates an interrupt at the end of the ninth clock cycle by setting the
SSPIF bit.
g) The user loads the SSPBUF with eight bits of data.
h) DATA is shifted out the SDA pin until all 8 bits are transmitted.
i) The MSSP module shifts in the ACK bit from the slave device, and writes its value into the
SSPCON2 Register (SSPCON2 register).
j) The MSSP module generates an interrupt at the end of the ninth clock cycle by setting the
SSPIF bit.
k) The user generates a Stop condition by setting the Stop enable bit, PEN (SSPCON2 register).
l) Interrupt is generated once the Stop condition is complete.
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DS39520A-page 20-30 2000 Microchip Technology Inc.
20.4.8 Baud Rate Generator
In I2C Master Mode, the reload value for the BRG is located in the lower 7 bits of the SSPADD
Register (Figure 20-18). When the BRG is loaded with this value, the BRG counts down to 0 and
stops until another reload has taken place. The BRG count is decremented twice per instruction
cycle (TCY) on the Q2 and Q4 clocks. In I2C Master Mode, the BRG is reloaded automatically. If
clock arbitration is taking place for instance, the BRG will be reloaded when the SCL pin is sampled
high (Figure 20-19).
Figure 20-18: Baud Rate Generator Block Diagram
Figure 20-19: Baud Rate Generator Timing With Clock Arbitration
SSPM3:SSPM0
CLK BRG Down Counter FOSC/4
SSPADD<6:0>
SSPM3:SSPM0
SCL
Reload
Control
Reload
SDA
SCL
SCL de-asserted, but Slave holds
DX DX-1
BRG
SCL is sampled high, reload takes
place, and BRG starts its count
03h 02h 01h 00h (hold off) 03h 02h
reload
BRG
value
SCL low (Clock Arbitration)
SCL allowed to transition high
BRG decrements on
Q2 and Q4 cycles
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Section 20. Master SSP
Master SSP
20
20.4.9 I2C Master Mode Start Condition Timing
To initiate a Start condition, the user sets the Start condition enable bit, SEN (SSPCON2
register). If the SDA and SCL pins are sampled high, the baud rate generator is re-loaded with
the contents of SSPADD<6:0>, and starts its count. If the SCL and SDA pins are both sampled
high when the baud rate generator times out (TBRG), the SDA pin is driven low. The action of the
SDA pin being driven low while the SCL pin is high in the Start condition, and causes the S bit
(SSPSTAT register) to be set. Following this, the baud rate generator is reloaded with the
contents of SSPADD<6:0> and resumes its count. When the baud rate generator times out
(TBRG) the SEN bit (SSPCON2 register) will be automatically cleared by hardware, the baud rate
generator is suspended leaving the SDA line held low, and the Start condition is complete.
20.4.9.1 WCOL Status Flag
If the user writes the SSPBUF when an Start sequence is in progress, then WCOL is set and the
contents of the buffer are unchanged (the write doesn’t occur).
Figure 20-20: First Start Bit Timing
Note: If at the beginning of Start condition, the SDA and SCL pins are already sampled low,
or if during the Start condition the SCL pin is sampled low before the SDA pin is
driven low, a bus collision occurs. The Bus Collision Interrupt Flag, BCLIF, is set, the
Start condition is aborted, and the I2C module is reset into its idle state.
Note: Because queueing of events is not allowed, writing to the lower 5 bits of SSPCON2
is disabled until the Start condition is complete.
SDA
SCL
S
TBRG
1st Bit 2nd Bit
TBRG
SDA = 1, At completion of Start Bit, SCL = 1
TBRG Write to SSPBUF occurs here
hardware clears SEN Bit
TBRG
Write to SEN Bit occurs here Set S bit (SSPSTAT<3>)
and sets SSPIF Bit
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DS39520A-page 20-32 2000 Microchip Technology Inc.
Figure 20-21: Start Condition Flowchart
Idle Mode
SEN (SSPCON2<0> = 1)
Bus collision detected
Set BCLIF Bit SDA = 1?
Load BRG with
Yes
BRG
Rollover?
Force SDA = 0,
Load BRG with
SSPADD<6:0>,
No
Yes
Force SCL = 0,
Clear SEN bit,
Set S Bit
SSPADD<6:0>
SCL = 1?
SDA = 0?
No
Yes
BRG
rollover?
No
Clear SEN Bit
Start condition Done,
No
Yes
Reset BRG
SCL= 0?
No
Yes
SCL = 0? No
Yes
Reset BRG
Release SCL Bit
SSPEN = 1
SSPCON1<3:0> =1000
Set SSPIF bit
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2000 Microchip Technology Inc. DS39520A-page 20-33
Section 20. Master SSP
Master SSP
20
20.4.10 I2C Master Mode Repeated Start Condition Timing
A Repeated Start condition occurs when the RSEN bit (SSPCON2 register) is programmed high
and the I2C logic module is in the idle state. When the RSEN bit is set, the SCL pin is asserted
low. When the SCL pin is sampled low, the baud rate generator is loaded with the contents of
SSPADD<5:0>, and begins counting. The SDA pin is released (brought high) for one baud rate
generator count (TBRG). When the baud rate generator times out, if SDA is sampled high, the
SCL pin will be de-asserted (brought high). When the SCL pin is sampled high, the baud rate
generator is re-loaded with the contents of SSPADD<6:0> and begins counting. SDA and SCL
must be sampled high for one TBRG. This action is then followed by assertion of the SDA pin (SDA
= 0) for one TBRG while SCL is high. Following this, the RSEN bit (SSPCON2 register) will be
automatically cleared and the baud rate generator is not reloaded, leaving the SDA pin held low.
As soon as a Start condition is detected on the SDA and SCL pins, the S bit (SSPSTAT register)
will be set. The SSPIF bit will not be set until the baud rate generator has timed-out.
Immediately following the SSPIF bit getting set, the user may write the SSPBUF with the 7-bit
address in 7-bit mode, or the default first address in 10-bit mode. After the first eight bits are
transmitted and an ACK is received, the user may then transmit an additional eight bits of address
(10-bit mode) or eight bits of data (7-bit mode).
Note 1: If RSEN is programmed while any other event is in progress, it will not take effect.
Note 2: A bus collision during the Repeated Start condition occurs if:
• SDA is sampled low when SCL goes from low to high.
• SCL goes low before SDA is asserted low. This may indicate that another
master is attempting to transmit a data "1".
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DS39520A-page 20-34 2000 Microchip Technology Inc.
20.4.10.1 WCOL Status Flag
If the user writes the SSPBUF when a Repeated Start sequence is in progress, then WCOL is
set and the contents of the buffer are unchanged (the write doesn’t occur).
Figure 20-22: Repeat Start Condition Waveform
Note: Because queueing of events is not allowed, writing of the lower 5 bits of SSPCON2
is disabled until the Repeated Start condition is complete.
SDA
SCL
Sr = Repeated Start
Write to SSPCON2
Falling edge of ninth clock Write to SSPBUF occurs here
End of transmit
At completion of START Bit,
hardware clear RSEN bit
1st Bit
Set S (SSPSTAT<3>)
TBRG
TBRG
SDA = 1,
SDA = 1
SCL (no change)
SCL = 1
occurs here
TBRG TBRG TBRG
and sets SSPIF
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Section 20. Master SSP
Master SSP
20
Figure 20-23: Repeated Start Condition Flowchart (part 1 of 2)
Idle Mode,
SSPEN = 1,
Force SCL = 0
SCL = 0?
Release SDA pin,
Load BRG with
SCL = 1?
No
Yes
No
Yes
BRG
No
Yes
Release SCL pin
SSPCON1<3:0> = 1000
rollover?
SSPADD<6:0>
Load BRG with
SSPADD<6:0>
(Clock Arbitration)
A
B
C
SDA = 1?
No
Yes
Start
RSEN = 1
Bus Collision,
Set BCLIF,
Release SDA pin,
Clear RSEN
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PIC18C Reference Manual
DS39520A-page 20-36 2000 Microchip Technology Inc.
Figure 20-24: Repeated Start Condition Flowchart (part 2 of 2)
Force SDA = 0,
Load BRG with
SSPADD<6:0>
Yes
Repeated Start
Clear RSEN,
Yes
BRG
rollover?
BRG
rollover?
Yes
SDA = 0?
No
SCL = 1?
No
B
Set S
C A
No
No
Yes
Force SCL = 0,
Reset BRG
Set SSPIF
SCL = '0'?
Reset BRG
No
Yes
condition done,
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2000 Microchip Technology Inc. DS39520A-page 20-37
Section 20. Master SSP
Master SSP
20
20.4.11 I2C Master Mode Transmission
Transmission of a data byte, a 7-bit address, or the other half of a 10-bit address is accomplished
by simply writing a value to SSPBUF Register. This action will set the buffer full flag bit, BF, and
allow the baud rate generator to begin counting and start the next transmission. Each bit of
address/data will be shifted out onto the SDA pin after the falling edge of SCL is asserted (see
data hold time specification parameter 106 in the “Electrical Specifications” section). SCL is
held low for one baud rate generator roll over count (TBRG). Data should be valid before SCL is
released high (see data setup time specification parameter 107 in the “Electrical Specifications”
section). When the SCL pin is released high, it is held that way for TBRG, the data on the
SDA pin must remain stable for that duration and some hold time after the next falling edge of
SCL. After the eighth bit is shifted out (the falling edge of the eighth clock), the BF bit is cleared
and the master releases the SDA pin. This allows the slave device being addressed to respond
with an ACK bit during the ninth bit time, if an address match occurs or if data was received properly.
The status of ACK is written into the ACKDT bit on the falling edge of the ninth clock. If the
master receives an acknowledge, the acknowledge status bit, ACKSTAT, is cleared. If not, the bit
is set. After the ninth clock, the SSPIF bit is set and the master clock (baud rate generator) is
suspended until the next data byte is loaded into the SSPBUF, leaving the SCL pin low and the
SDA pin unchanged (Figure 20-26).
After the write to the SSPBUF, each bit of address will be shifted out on the falling edge of SCL
until all seven address bits and the R/W bit are completed. On the falling edge of the eighth clock,
the master will de-assert the SDA pin allowing the slave to respond with an acknowledge. On the
falling edge of the ninth clock, the master will sample the SDA pin to see if the address was recognized
by a slave. The status of the ACK bit is loaded into the ACKSTAT status bit (SSPCON2
register). Following the falling edge of the ninth clock transmission of the address, the SSPIF is
set, the BF flag is cleared, and the baud rate generator is turned off until another write to the SSPBUF
takes place, holding SCL low and allowing SDA to float.
20.4.11.1 BF Status Flag
In transmit mode, the BF bit (SSPSTAT register) is set when the CPU writes to SSPBUF and is
cleared when all 8 bits are shifted out.
20.4.11.2 WCOL Status Flag
If the user writes the SSPBUF when a transmit is already in progress (i.e. SSPSR is still shifting
out a data byte), then WCOL is set and the contents of the buffer are unchanged (the write
doesn’t occur).
WCOL must be cleared in software.
20.4.11.3 ACKSTAT Status Flag
In transmit mode, the ACKSTAT bit (SSPCON2 register) is cleared when the slave has sent an
acknowledge (ACK = 0), and is set when the slave does not acknowledge (ACK = 1). A slave
sends an acknowledge when it has recognized its address (including a general call), or when the
slave has properly received its data.
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DS39520A-page 20-38 2000 Microchip Technology Inc.
Figure 20-25: Master Transmit Flowchart
Idle Mode
Num_Clocks = 0,
Release SDA so
Num_Clocks slave can drive ACK,
Load BRG with
SDA = Current Data bit
Yes
BRG
rollover?
BRG No
No
Yes
Force SCL = 0
= 8?
Yes
No
Yes
BRG
rollover?
No
Force SCL = 1,
Stop BRG
SCL = 1?
Load BRG with
count high time
Rollover?
No
Read SDA and place into
ACKSTAT bit (SSPCON2<6>)
Force SCL = 0,
SCL = 1?
SDA =
Data bit?
No
Yes
Yes
rollover?
No
Yes
Stop BRG,
Force SCL = 1
(Clock Arbitration)
(Clock Arbitration)
Num_Clocks
= Num_Clocks + 1
Bus collision detected
Set BCLIF, hold prescale off,
Yes
No
BF = 1
Force BF = 0
SSPADD<6:0>,
start BRG count,
Load BRG with
SSPADD<6:0>,
start BRG count
SSPADD<6:0>,
Load BRG with
count SCL high time
SSPADD<6:0>,
SDA =
Data bit?
Yes
No
Clear Transmit enable
SCL = 0?
No
Yes
Reset BRG
Write SSPBUF
Set SSPIF
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2000 Microchip Technology Inc. DS39520A-page 20-39
Section 20. Master SSP
Master SSP
20
Figure 20-26: I2C Master Mode Waveform (Transmission, 7 or 10-bit Address) SDA SCL SSPIF BF (SSPSTAT<0>) SEN A7 A6 A5 A4 A3 A2 A1 ACK = 0 D7 D6 D5 D4 D3 D2 D1 D0 ACK Transmitting data or second half Transmit Address to Slave R/W = 0 123456789 123456789 P Cleared in software service routine SSPBUF is written in software From SSP interrupt After Start condition, SEN bit cleared by hardware
S
SSPBUF written with 7-bit address and R/W.
Start transmit
SCL held low
while CPU
responds to SSPIF
SEN = 0
of 10-bit address
Write SSPCON2<0> SEN = 1
Start condition begins From Slave, clear ACKSTAT bit SSPCON2<6>
ACKSTAT in
SSPCON2 = 1
Cleared in software
SSPBUF written
PEN
Cleared in software
R/W
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DS39520A-page 20-40 2000 Microchip Technology Inc.
20.4.12 I2C Master Mode Reception
Master Mode reception is enabled by programming the receive enable bit, RCEN (SSPCON2
register).
The baud rate generator begins counting, and on each rollover, the state of the SCL pin changes
(high to low/low to high) and data is shifted into the SSPSR. After the falling edge of the eighth
clock, the receive enable flag is automatically cleared, the contents of the SSPSR are loaded into
the SSPBUF, the BF flag bit is set, the SSPIF flag bit is set, and the baud rate generator is suspended
from counting, holding SCL low. The MSSP is now in idle state, awaiting the next command.
When the buffer is read by the CPU, the BF flag bit is automatically cleared. The user can
then send an acknowledge bit at the end of reception by setting the acknowledge sequence
enable bit, ACKEN (SSPCON2 register).
20.4.12.1 BF Status Flag
In receive mode, the BF bit is set when an address or data byte is loaded into SSPBUF from
SSPSR. It is cleared when the SSPBUF Register is read.
20.4.12.2 SSPOV Status Flag
In receive mode, the SSPOV bit is set when 8 bits are received into the SSPSR, and the BF flag
bit is already set from a previous reception.
20.4.12.3 WCOL Status Flag
If the user writes the SSPBUF when a receive is already in progress (i.e., SSPSR is still shifting
in a data byte), then the WCOL bit is set and the contents of the buffer are unchanged (the write
doesn’t occur).
Note: The MSSP module must be in an idle state before the RCEN bit is set, or the RCEN
bit will be disregarded.
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Section 20. Master SSP
Master SSP
20
Figure 20-27: Master Receiver Flowchart
Idle Mode
Num_Clocks = 0,
Release SDA
Force SCL=0,
Yes
BRG No
rollover?
Release SCL
Yes
No SCL = 1?
Load BRG with
Yes
BRG No
rollover?
(Clock Arbitration)
Load BRG w/
start count
SSPADD<6:0>,
start count
Sample SDA pin,
Shift data into SSPSR
Num_Clocks
= Num_Clocks + 1
Yes
Num_Clocks
= 8?
No
Force SCL = 0,
Set SSPIF bit,
Set BF bit.
Move contents of SSPSR
into SSPBUF,
Clear RCEN
RCEN = 1
SSPADD<6:0>,
SCL = 0?
Yes
No
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DS39520A-page 20-42
PIC18C Reference Manual
2000 Microchip Technology Inc.
Figure 20-28: I2C Master Mode Waveform (Reception 7-Bit Address)
P 5 6 7 8 9
D7 D6 D5 D4 D3 D2 D1 D0
S
SDA A7 A6 A5 A4 A3 A2 A1
SCL 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1234
Bus Master
terminates
transfer
ACK
Receiving Data from Slave Receiving Data from Slave
ACK D7 D6 D5 D4 D3 D2 D1 D0
R/W = 1
Transmit Address to Slave
SSPIF
BF
ACK is not sent
Write to SSPCON2<0> (SEN = 1)
Write to SSPBUF occurs here
ACK from Slave
Master configured as a receiver
SSPCON2<3>, (RCEN = 1) PEN bit = 1
written here
Data shifted in on falling edge
Cleared in software
Start transmit
SEN = 0
SSPOV
SDA = 0, SCL = 1
(SSPSTAT<0>)
ACK
Last bit is shifted into SSPSR and
contents are unloaded into SSPBUF
Cleared in software
Cleared in software
Set SSPIF interrupt
at end of receive
Set P bit
(SSPSTAT<4>)
and SSPIF
Cleared in software
ACK from Master
Set SSPIF at end
Set SSPIF interrupt at end of acknowledge
sequence
Set SSPIF interrupt at end of acknowledge
sequence of receive
Set ACKEN, start acknowledge sequence
SSPOV is set because
SSPBUF is still full
SDA = ACKDT = 1
RCEN cleared
automatically RCEN = 1 start next receive
Write to SSPCON2<4>
to start acknowledge sequence
SDA = ACKDT (SSPCON2<5>) = 0
RCEN cleared automatically
responds to SSPIF
ACKEN
Begin Start condition
Cleared in software
SDA = ACKDT = 0
by programming
of CLK
while CPU
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Section 20. Master SSP
Master SSP
20
20.4.13 Acknowledge Sequence Timing
An acknowledge sequence is enabled by setting the acknowledge sequence enable bit, ACKEN
(SSPCON2 register). When this bit is set, the SCL pin is pulled low and the contents of the
acknowledge data bit is presented on the SDA pin. If the user wishes to generate an acknowledge,
then the ACKDT bit should be cleared. If not, the user should set the ACKDT bit before
starting an acknowledge sequence. The baud rate generator then counts for one rollover period
(TBRG), and the SCL pin is de-asserted (pulled high). When the SCL pin is sampled high (clock
arbitration), the baud rate generator counts for TBRG. The SCL pin is then pulled low. Following
this, the ACKEN bit is automatically cleared, the baud rate generator is turned off, and the MSSP
module then goes into idle mode (Figure 20-29).
20.4.13.1 WCOL Status Flag
If the user writes the SSPBUF when an acknowledge sequence is in progress, then WCOL is set
and the contents of the buffer are unchanged (the write doesn’t occur).
Figure 20-29: Acknowledge Sequence Waveform
SDA
SCL
Set SSPIF at the end
Acknowledge sequence starts here,
Write to SSPCON2 ACKEN bit automatically cleared
Cleared in
TBRG TBRG
of receive
ACK
8
ACKEN = 1, ACKDT = 0
D0
9
SSPIF
software
Set SSPIF at the end
of acknowledge sequence
Cleared in
software
Note: TBRG = one baud rate generator period.
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DS39520A-page 20-44 2000 Microchip Technology Inc.
Figure 20-30: Acknowledge Flowchart
Idle Mode
Force SCL = 0
Yes
No SCL = 0?
Drive ACKDT bit
Yes
No BRG
rollover?
(SSPCON2<5>)
onto SDA pin,
Load BRG with
SSPADD<6:0>,
start count
Force SCL = 1
Yes
No SCL = 1?
No ACKDT = 1?
Load BRG with
No
BRG
rollover?
SSPADD <6:0>,
start count
No
SDA = 1?
Bus collision detected,
Set BCLIF,
Yes
Force SCL = 0,
(Clock Arbitration)
Clear ACKEN
No
SCL = 0? Reset BRG Clear ACKEN
Set ACKEN
Release SCL,
Yes
Yes
Yes
Set SSPIF
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Section 20. Master SSP
Master SSP
20
20.4.14 Stop Condition Timing
A Stop bit is asserted on the SDA pin at the end of a receive/transmit by setting the Stop
sequence enable bit, PEN (SSPCON2 register). At the end of a receive/transmit, the SCL pin is
held low after the falling edge of the ninth clock. When the PEN bit is set, the master will assert
the SDA line low. When the SDA line is sampled low, the baud rate generator is reloaded and
counts down to 0. When the baud rate generator times out, the SCL pin will be brought high, and
one TBRG (baud rate generator rollover count) later, the SDA pin will be de-asserted. When the
SDA pin is sampled high while the SCL pin is high, the P bit (SSPSTAT register) is set. A TBRG
later, the PEN bit is cleared and the SSPIF bit is set (Figure 20-31).
Whenever the firmware decides to take control of the bus, it will first determine if the bus is busy
by checking the S and P bits in the SSPSTAT Register. If the bus is busy, then the CPU can be
interrupted (notified) when a Stop bit is detected (i.e., bus is free).
20.4.14.1 WCOL Status Flag
If the user writes the SSPBUF when a Stop sequence is in progress, then the WCOL bit is set
and the contents of the buffer are unchanged (the write doesn’t occur).
Figure 20-31: Stop Condition Receive or Transmit Mode
SCL
SDA
SDA asserted low before rising edge of clock
Write to SSPCON2
Set PEN
Falling edge of
SCL = 1 for TBRG, followed by SDA = 1 for TBRG
9th clock
SCL brought high after TBRG
TBRG TBRG
after SDA sampled high. P bit (SSPSTAT<4>) is set
TBRG
to setup STOP condition.
ACK
P
TBRG
PEN bit (SSPCON2<2>) is cleared by
hardware and the SSPIF bit is set
Note: TBRG = one baud rate generator period.
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DS39520A-page 20-46 2000 Microchip Technology Inc.
Figure 20-32: Stop Condition Flowchart
Idle Mode,
SSPEN = 1,
Force SDA = 0
SCL doesn’t change
SDA = 0?
De-assert SCL,
SCL = 1
SCL = 1?
No
Yes
Start BRG
No
Yes
BRG
SDA going from
0 to 1 while SCL = 1,
No
Yes
Set SSPIF,
Release SDA,
Start BRG
Stop condition done
SSPCON1<3:0>=1000
rollover?
BRG No
rollover?
Yes
P bit set?
No
Yes
Bus Collision detected,
Set BCLIF,
Clear PEN
Start BRG
No
Yes
BRG
rollover?
(Clock Arbitration)
PEN = 1
PEN cleared
39500 18C Reference Manual.book Page 46 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39520A-page 20-47
Section 20. Master SSP
Master SSP
20
20.4.15 Clock Arbitration
Clock arbitration occurs when the master, during any receive, transmit, or Repeated Start/Stop
condition de-asserts the SCL pin (SCL allowed to float high). When the SCL pin is allowed to float
high, the baud rate generator (BRG) is suspended from counting until the SCL pin is actually
sampled high. When the SCL pin is sampled high, the baud rate generator is reloaded with the
contents of SSPADD<6:0> and begins counting. This ensures that the SCL high time will always
be at least one BRG rollover count in the event that the clock is held low by an external device
(Figure 20-33).
Figure 20-33: Clock Arbitration Timing in Master Transmit Mode
20.4.15.1 Sleep Operation
While in sleep mode, the I2C module can receive addresses or data. When an address match or
complete byte transfer occurs, the processor will wake-up from sleep (if the MSSP interrupt is
enabled).
20.4.15.2 Effect of a Reset
A reset disables the MSSP module and terminates the current transfer.
SCL
SDA
BRG overflow,
Release the SCL pin,
If SCL = 1 Load BRG with
SSPADD<6:0>, and start count BRG overflow occurs,
Release SCL, slave device holds the SCL pin low. SCL = 1 BRG starts counting
clock high interval.
SCL line sampled once every machine cycle (TOSC • 4).
Hold off BRG until SCL is sampled high
TBRG TBRG TBRG
to measure high time interval
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DS39520A-page 20-48 2000 Microchip Technology Inc.
20.4.16 Multi-Master Communication, Bus Collision, and Bus Arbitration
Multi-Master Mode support is achieved by bus arbitration. When the master outputs address/data
bits onto the SDA pin, arbitration takes place when the master outputs a '1' on SDA by letting SDA
float high and another master asserts a '0'. When the SCL pin floats high, data should be stable.
If the expected data on SDA is a '1' and the data sampled on the SDA pin = '0', then a bus collision
has taken place. The master will set the Bus Collision Interrupt Flag, BCLIF and reset the I2C
port to its idle state. (Figure 20-34).
If a transmit was in progress when the bus collision occurred, the transmission is halted, the BF
flag is cleared, the SDA and SCL pins are de-asserted, and the SSPBUF can be written to. When
the user services the bus collision interrupt service routine, and if the I2C bus is free, the user
can resume communication by asserting a Start condition.
If a Start, Repeated Start, Stop, or Acknowledge condition was in progress when the bus collision
occurred, the condition is aborted, the SDA and SCL lines are de-asserted, and the respective
control bits in the SSPCON2 Register are cleared. When the user services the bus collision interrupt
service routine, and if the I2C bus is free, the user can resume communication by asserting
a Start condition.
The Master will continue to monitor the SDA and SCL pins, and if a Stop condition occurs, the
SSPIF bit will be set.
A write to the SSPBUF will start the transmission of data at the first data bit, regardless of where
the transmitter left off when bus collision occurred.
In multi-Master Mode, the interrupt generation on the detection of Start and Stop conditions
allows the determination of when the bus is free. Control of the I2C bus can be taken when the P
bit is set in the SSPSTAT Register, or the bus is idle and the S and P bits are cleared.
Figure 20-34: Bus Collision Timing for Transmit and Acknowledge
SDA
SCL
BCLIF
SDA released
SDA line pulled low
by another source
data doesn’t match what is driven
Bus collision has occurred
Set bus collision
interrupt (BCLIF)
by the Master.
by Master
Data changes
while SCL = 0
While the SCL pin is high
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2000 Microchip Technology Inc. DS39520A-page 20-49
Section 20. Master SSP
Master SSP
20
20.4.16.1 Bus Collision During a Start Condition
During a Start condition, a bus collision occurs if:
a) SDA or SCL pins are sampled low at the beginning of the Start condition (Figure 20-35).
b) SCL pins are sampled low before the SDA pin is asserted low (Figure 20-36).
During a Start condition both the SDA and the SCL pins are monitored.
If one of the following conditions exists:
• the SDA pin is already low
• or the SCL pin is already low,
Then, the following actions occur:
• the Start condition is aborted,
• the BCLIF bit is set,
• the MSSP module is reset to its idle state (Figure 20-35).
The Start condition begins with the SDA and SCL pins de-asserted. When the SDA pin is sampled
high, the baud rate generator is loaded from SSPADD<6:0> and counts down to O. If the
SCL pin is sampled low while SDA is high, a bus collision occurs, because it is assumed that
another master is attempting to drive a data '1' during the Start condition.
If the SDA pin is sampled low during this count, the BRG is reset and the SDA line is asserted
early (Figure 20-37). If however a '1' is sampled on the SDA pin, the SDA pin is asserted low at
the end of the BRG count. The baud rate generator is then reloaded and counts down to O. During
this time, if the SCL pins is sampled as '0', a bus collision does not occur. At the end of the
BRG count the SCL pin is asserted low.
Figure 20-35: Bus Collision During Start Condition (SDA only)
Note: The reason that bus collision is not a factor during a Start condition is that no two bus
masters can assert a Start condition at the exact same time. Therefore, one master
will always assert SDA before the other. This condition does not cause a bus collision
because the two masters must be allowed to arbitrate the first address following the
Start condition, and if the address is the same, arbitration must be allowed to continue
into the data portion, Repeated Start, or Stop conditions.
SDA
SCL
SEN
SDA sampled low before
SDA goes low before the SEN bit is set.
S bit and SSPIF set because SDA = 0, SCL = 1
SSP module reset into idle state
SEN cleared automatically because of bus collision.
S bit and SSPIF set because
Set SEN, enable Start
condition if SDA = 1, SCL=1
BCLIF
S
SSPIF
SDA = 0, SCL = 1
SSPIF and BCLIF are
cleared in software
SSPIF and BCLIF are
cleared in software
Set BCLIF,
START condition; Set BCLIF
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DS39520A-page 20-50 2000 Microchip Technology Inc.
Figure 20-36: Bus Collision During Start Condition (SCL = 0)
Figure 20-37: BRG Reset Due to SDA Arbitration During Start Condition
SDA
SCL
SEN Bus collision occurs, Set BCLIF
SCL = 0 before SDA = 0,
Set SEN, enable start
sequence if SDA = 1, SCL = 1
TBRG TBRG
SDA = 0, SCL = 1
BCLIF
S
SSPIF
Interrupt cleared
in software
Bus collision occurs, Set BCLIF
SCL = 0 before BRG time out,
'0' '0'
'0' '0'
SDA
SCL
SEN
Set S
Set SEN, enable START
sequence if SDA = 1, SCL = 1
Less than TBRG TBRG
SDA = 0, SCL = 1
BCLIF
S
SSPIF
s
Interrupts cleared
Set SSPIF in software
SDA = 0, SCL = 1
SDA pulled low by other Master.
Reset BRG and assert SDA
SCL pulled low after BRG
Timeout
Set SSPIF
'0'
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2000 Microchip Technology Inc. DS39520A-page 20-51
Section 20. Master SSP
Master SSP
20
20.4.16.2 Bus Collision During a Repeated Start Condition
During a Repeated Start condition, a bus collision occurs if:
a) A low level is sampled on SDA when SCL goes from low level to high level.
b) SCL goes low before SDA is asserted low, indicating that another master is attempting to
transmit a data ’1’.
When the user de-asserts SDA and the pin is allowed to float high, the BRG is loaded with
SSPADD<6:0> and counts down to 0. The SCL pin is then de-asserted, and when sampled high,
the SDA pin is sampled.
If SDA is low, a bus collision has occurred (i.e., another master, is attempting to transmit a data
’0’). If the SDA pin is sampled high, then the BRG is reloaded and begins counting. If the SDA
pin goes from high to low before the BRG times out, no bus collision occurs because no two masters
can assert SDA at exactly the same time, (Figure 20-38).
If the SCL pin goes from high to low before the BRG times out and the SDA pin has not already
been asserted, then a bus collision occurs. In this case, another master is attempting to transmit
a data ’1’ during the Repeated Start condition, (Figure 20-39).
If at the end of the BRG time-out, both the SCL and SDA pins are still high, the SDA pin is driven
low and the BRG is reloaded and begins counting. At the end of the count, regardless of the status
of the SCL pin, the SCL pin is driven low and the Repeated Start condition is complete.
Figure 20-38: Bus Collision During a Repeated Start Condition (Case 1)
Figure 20-39: Bus Collision During Repeated Start Condition (Case 2)
SDA
SCL
RSEN
BCLIF
S
SSPIF
Sample SDA when SCL goes high.
If SDA = 0, set BCLIF and release SDA and SCL
Cleared in software
'0'
'0'
SDA
SCL
BCLIF
RSEN
S
SSPIF
Interrupt cleared
in software
SCL pin goes low before SDA pin,
Set BCLIF, Release SDA and SCL pins
TBRG TBRG
'0'
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DS39520A-page 20-52 2000 Microchip Technology Inc.
20.4.16.3 Bus Collision During a Stop Condition
Bus collision occurs during a Stop condition if:
a) After the SDA pin has been de-asserted and allowed to float high, SDA is sampled low
after the BRG has timed out.
b) After the SCL pin is de-asserted, SCL is sampled low before SDA goes high.
The Stop condition begins with SDA asserted low. When SDA is sampled low, the SCL pin is
allow to float. When the pin is sampled high (clock arbitration), the baud rate generator is loaded
with SSPADD<6:0> and counts down to 0. After the BRG times out, SDA is sampled. If SDA is
sampled low, a bus collision has occurred. This is due to another master attempting to drive a
data '0' (Figure 20-40). If the SCL pin is sampled low before SDA is allowed to float high, a bus
collision occurs. This is another case of another master attempting to drive a data '0'
(Figure 20-41).
Figure 20-40: Bus Collision During a Stop Condition (Case 1)
Figure 20-41: Bus Collision During a Stop Condition (Case 2)
SDA
SCL
BCLIF
PEN
P
SSPIF
TBRG TBRG TBRG
SDA asserted low
SDA sampled
low after TBRG,
Set BCLIF
'0'
'0'
SDA
SCL
BCLIF
PEN
P
SSPIF
TBRG TBRG TBRG
Assert SDA SCL goes low before SDA goes high
Set BCLIF
'0'
'0'
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2000 Microchip Technology Inc. DS39520A-page 20-53
Section 20. Master SSP
Master SSP
20
20.4.17 Connection Considerations for I2C Bus
For standard-mode I2C bus devices, the values of resistors Rp and Rs in Figure 20-42 depend
on the following parameters:
• Supply voltage
• Bus capacitance
• Number of connected devices (input current + leakage current)
The supply voltage limits the minimum value of resistor Rp due to the specified minimum sink
current of 3 mA at VOLMAX = 0.4V for the specified output stages. For example, with a supply voltage
of VDD = 5V+10% and VOLMAX = 0.4V at 3 mA, RPMIN = (5.5-0.4)/0.003 = 1.7 kΩ. VDD as a
function of Rp is shown in Figure 20-42. The desired noise margin of 0.1VDD for the low level.
This limits the maximum value of Rs. Series resistors are optional, and used to improve ESD susceptibility.
The bus capacitance is the total capacitance of wire, connections, and pins. This capacitance
limits the maximum value of Rp due to the specified rise time (Figure 20-42).
The SMP bit is the slew rate control enabled bit. This bit is in the SSPSTAT Register, and controls
the slew rate of the I/O pins when in I2C mode (master or slave).
Figure 20-42: Sample Device Configuration for I2C Bus
RP RP
VDD + 10%
SDA
SCL
DEVICE
CB = 10 - 400 pF
RS RS
Note: I
2C devices with input levels related to VDD must have one common supply line
to which the pull up resistor is also connected.
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DS39520A-page 20-54 2000 Microchip Technology Inc.
20.4.18 Initialization
Example 20-2: SPI Master Mode Initialization
20.4.19 Master SSP Module / Basic SSP Module Compatibility
When changing from the SPI in the Mid-range Family Basic SSP module, the SSPSTAT Register
contains two additional control bits. These bits are:
• SMP, SPI data input sample phase
• CKE, SPI Clock Edge Select
To be compatible with the SPI of the Master SSP module, these bits must be appropriately configured.
If these bits are not at the states shown in Table 20-5, improper SPI communication may
occur.
Table 20-5: New bit States for Compatibility
CLRF STATUS ; Bank 0
CLRF SSPSTAT ; SMP = 0, CKE = 0, and
; clear status bits
BSF SSPSTAT, CKE ; CKE = 1
MOVLW 0x31 ; Set up SPI port, Master Mode, CLK/16,
MOVWF SSPCON ; Data xmit on falling edge
; (CKE=1 & CKP=1)
; Data sampled in middle
; (SMP=0 & Master Mode)
BSF PIE, SSPIE ; Enable SSP interrupt
BSF INTCON, GIE ; Enable, enabled interrupts
MOVLW DataByte ; Data to be Transmitted
; Could move data from RAM location
MOVWF SSPBUF ; Start Transmission
Basic SSP Module Master SSP Module
CKP CKP CKE SMP
1 100
0 000
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2000 Microchip Technology Inc. DS39520A-page 20-55
Section 20. Master SSP
Master SSP
20
20.5 Design Tips
Question 1: Using SPI mode, I do not seem able to talk to an SPI device.
Answer 1:
Ensure that you are using the correct SPI mode for that device. This SPI supports all 4 SPI
modes so you should be able to get it to function. Check the clock polarity and the clock phase.
Question 2: Using I2C mode, I write data to the SSPBUF Register, but the data did not
transmit.
Answer 2:
Ensure that you set the CKP bit to release the I2C clock.
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DS39520A-page 20-56 2000 Microchip Technology Inc.
20.6 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is they may be written for
the Baseline, the Midrange, or High-end families), but the concepts are pertinent, and could be
used (with modification and possible limitations). The current application notes related to the
Master SSP modules are:
Title Application Note #
Use of the SSP Module in the I 2C Multi-Master Environment. AN578
Using Microchip 93 Series Serial EEPROMs with Microcontroller SPI Ports AN613
Interfacing PIC16C64/74 to Microchip SPI Serial EEPROM AN647
Interfacing a Microchip PIC16C92x to Microchip SPI Serial EEPROM AN668
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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2000 Microchip Technology Inc. DS39520A-page 20-57
Section 20. Master SSP
Master SSP
20
20.7 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Master SSP module description.
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DS39520A-page 20-58 2000 Microchip Technology Inc.
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2000 Microchip Technology Inc. DS39521A-page 21-1
Addressable
USART
21
Section 21. Addressable USART
HIGHLIGHTS
This section of the manual contains the following major topics:
21.1 Introduction .................................................................................................................. 21-2
21.2 Control Registers ......................................................................................................... 21-3
21.3 USART Baud Rate Generator (BRG)........................................................................... 21-5
21.4 USART Asynchronous Mode ....................................................................................... 21-9
21.5 USART Synchronous Master Mode........................................................................... 21-18
21.6 USART Synchronous Slave Mode ............................................................................. 21-23
21.7 Initialization ................................................................................................................ 21-25
21.8 Design Tips ................................................................................................................ 21-26
21.9 Related Application Notes.......................................................................................... 21-27
21.10 Revision History ......................................................................................................... 21-28
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DS39521A-page 21-2 2000 Microchip Technology Inc.
21.1 Introduction
The Addressable Universal Synchronous Asynchronous Receiver Transmitter (Addressable
USART) module is one of the serial I/O modules available in the PIC18CXXX family (another is
the MSSP module). The Addressable USART can be configured as a full duplex asynchronous
system that can communicate with peripheral devices, such as CRT terminals and personal computers,
or it can be configured as a half duplex synchronous system that can communicate with
peripheral devices, such as A/D or D/A integrated circuits, Serial EEPROMs, etc.
The Addressable USART can be configured in the following modes:
• Asynchronous (full duplex)
• Synchronous - Master (half duplex)
• Synchronous - Slave (half duplex)
The SPEN bit (RCSTA register) and the TRIS bits, for the USART’s pins, need to be set in order
to configure the TX/CK and RX/DT pins for the Addressable USART.
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2000 Microchip Technology Inc. DS39521A-page 21-3
Section 21. Addressable USART
Addressable
USART
21
21.2 Control Registers
Register 21-1: TXSTA: Transmit Status and Control Register
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R/W-0 R-1 R/W-0
CSRC TX9 TXEN SYNC — BRGH TRMT TX9D
bit 7 bit 0
bit 7 CSRC: Clock Source Select bit
When SYNC = 0 (Asynchronous mode)
Don’t care
When SYNC = 1 (Synchronous mode)
1 = Master mode (Clock generated internally from BRG)
0 = Slave mode (Clock from external source)
bit 6 TX9: 9-bit Transmit Enable bit
1 = Selects 9-bit transmission
0 = Selects 8-bit transmission
bit 5 TXEN: Transmit Enable bit
1 = Transmit enabled
0 = Transmit disabled
Note: The Receive Enable (SREN/CREN) bit overrides Transmit Enable (TXEN) bit in
SYNC mode.
bit 4 SYNC: Addressable USART Mode Select bit
1 = Synchronous mode
0 = Asynchronous mode
bit 3 Unimplemented: Read as '0'
bit 2 BRGH: High Baud Rate Select bit
When SYNC = 0 (Asynchronous mode)
1 = High speed
0 = Low speed
When SYNC = 1 (Synchronous mode)
Unused in this mode
bit 1 TRMT: Transmit Shift Register Status bit
1 = TSR empty
0 = TSR full
bit 0 TX9D: 9th bit of transmit data.
This bit can be used as an address/data bit or a parity bit.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Register 21-2: RCSTA: Receive Status and Control Register
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R-0 R-0 R-x
SPEN RX9 SREN CREN ADDEN FERR OERR RX9D
bit 7 bit 0
bit 7 SPEN: Serial Port Enable bit
1 = Serial port enabled (Configures RX/DT and TX/CK pins as serial port pins)
0 = Serial port disabled
bit 6 RX9: 9-bit Receive Enable bit
1 = Selects 9-bit reception
0 = Selects 8-bit reception
bit 5 SREN: Single Receive Enable bit
When SYNC = 0 (Asynchronous mode)
Don’t care
When SYNC = 1 (Synchronous mode) - master
1 = Enables single receive
0 = Disables single receive
This bit is cleared after reception of one byte is complete.
When SYNC = 1 (Synchronous mode) - slave
Unused in this mode
bit 4 CREN: Continuous Receive Enable bit
When SYNC = 0 (Asynchronous mode)
1 = Enables continuous receive
0 = Disables continuous receive
When SYNC = 1 (Synchronous mode)
1 = Enables continuous receive (CREN overrides SREN)
0 = Disables continuous receive
bit 3 ADDEN: Address Detect Enable bit
When SYNC = 0 (Asynchronous mode) with RX9 = 1 (9-bit receive enabled)
1 = Enables address detection, enable interrupt and loads of the receive buffer
when RSR<8> is set
0 = Disables address detection, all bytes are received, and ninth bit can be used as parity bit
When SYNC = 0 (Asynchronous mode) with RX9 = 0 (9-bit receive disabled)
Don’t care
When SYNC = 1 (Synchronous mode)
Don’t care
bit 2 FERR: Framing Error bit
1 = Framing error (Can be updated by reading RCREG register and receive next valid byte)
0 = No framing error
bit 1 OERR: Overrun Error bit
1 = Overrun error (Can be cleared by clearing bit CREN)
0 = No overrun error
bit 0 RX9D: 9th bit of received data. Can be address/data bit or a parity bit.
1 = Ninth received bit was ’1’
0 = Ninth received bit was ’0’
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 21. Addressable USART
Addressable
USART
21
21.3 USART Baud Rate Generator (BRG)
The BRG supports both the Asynchronous and Synchronous modes of the USART. It is a dedicated
8-bit baud rate generator. The SPBRG register controls the period of a free running 8-bit
timer. In Asynchronous mode, the BRGH bit (TXSTA<2>) also controls the baud rate. In Synchronous
mode, the BRGH bit is ignored. Table 21-1 shows the formula for computation of the baud
rate for different USART modes that only apply in master mode (internal clock).
Given the desired baud rate and FOSC, the nearest integer value for the SPBRG register can be
calculated using the formula in Table 21-1, where X equals the value in the SPBRG register (0 to
255). From this, the error in baud rate can be determined.
Table 21-1: Baud Rate Formula
Example 21-1 shows the calculation of the baud rate error for the following conditions:
FOSC = 16 MHz
Desired Baud Rate = 9600
BRGH = 0
SYNC = 0
Example 21-1:Calculating Baud Rate Error
It may be advantageous to use the high baud rate (BRGH = 1) even for slower baud clocks. This
is because the FOSC / (16(X + 1)) equation can reduce the baud rate error in some cases.
Writing a new value to the SPBRG register causes the BRG timer to be reset (or cleared). This
ensures the BRG does not wait for a timer overflow before outputting the new baud rate.
21.3.1 SAMPLING
The data on the RX/DT pin is sampled three times by a majority detect circuit to determine if a
high or a low level is present at the RX pin. See Section 21.4.4 for additional information.
Table 21-2: Registers Associated with Baud Rate Generator
SYNC BRGH = 0 (Low Speed) BRGH = 1 (High Speed)
0
1
(Asynchronous) Baud Rate = FOSC/(64(X+1))
(Synchronous) Baud Rate = FOSC/(4(X+1))
Baud Rate = FOSC/(16(X+1))
NA
X = value in SPBRG (0 to 255)
Desired Baud Rate = FOSC / (64 (X + 1))
Solving for X:
X = ( (FOSC / Desired Baud Rate) / 64 ) - 1
X = ((16000000 / 9600) / 64) - 1
X = [25.042] = 25
Calculated Baud Rate = 16000000 / (64 (25 + 1))
= 9615
Error = (Calculated Baud Rate - Desired Baud Rate)
Desired Baud Rate
= (9615 - 9600) / 9600
= 0.16%
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other resets
TXSTA CSRC TX9 TXEN SYNC — BRGH TRMT TX9D 0000 -010 0000 -010
RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 0000x 0000 000x
SPBRG Baud Rate Generator Register 0000 0000 0000 0000
Legend: x = unknown, - = unimplemented read as '0'. Shaded cells are not used by the BRG.
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Table 21-3: Baud Rates for Synchronous Mode
BAUD
RATE
(Kbps)
FOSC = 40 MHz SPBRG
value
(decimal)
33 MHz SPBRG
value
(decimal)
25 MHz SPBRG
value
(decimal)
20 MHz SPBRG
value
(decimal) KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 NA - - NA - - NA - - NA - -
1.2 NA - - NA - - NA - - NA - -
2.4 NA - - NA - - NA - - NA - -
9.6 NA - - NA - - NA - - NA - -
19.2 NA - - NA - - NA - - NA - -
76.8 76.92 +0.16 129 77.10 +0.39 106 77.16 +0.47 80 76.92 +0.16 64
96 96.15 +0.16 103 95.93 -0.07 85 96.15 +0.16 64 96.15 +0.16 51
300 303.03 +1.01 32 294.64 -1.79 27 297.62 -0.79 20 294.12 -1.96 16
500 500 0 19 485.30 -2.94 16 480.77 -3.85 12 500 0 9
HIGH 10000 - 0 8250 - 0 6250 - 0 5000 - 0
LOW 39.06 - 255 32.23 - 255 24.41 - 255 19.53 - 255
BAUD
RATE
(Kbps)
FOSC = 16 MHz SPBRG
value
(decimal)
10 MHz SPBRG
value
(decimal)
7.15909 MHz SPBRG
value
(decimal)
5.0688 MHz SPBRG
value
(decimal) KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 NA - - NA - - NA - - NA - -
1.2 NA - - NA - - NA - - NA - -
2.4 NA - - NA - - NA - - NA - -
9.6 NA - - NA - - 9.62 +0.23 185 9.60 0 131
19.2 19.23 +0.16 207 19.23 +0.16 129 19.24 +0.23 92 19.20 0 65
76.8 76.92 +0.16 51 75.76 -1.36 32 77.82 +1.32 22 74.54 -2.94 16
96 95.24 -0.79 41 96.15 +0.16 25 94.20 -1.88 18 97.48 +1.54 12
300 307.70 +2.56 12 312.50 +4.17 7 298.35 -0.57 5 316.80 +5.60 3
500 500 0 7 500 0 4 447.44 -10.51 3 422.40 -15.52 2
HIGH 4000 - 0 2500 - 0 1789.80 - 0 1267.20 - 0
LOW 15.63 - 255 9.77 - 255 6.99 - 255 4.95 - 255
BAUD
RATE
(Kbps)
FOSC = 4 MHz SPBRG
value
(decimal)
3.579545 MHz SPBRG
value
(decimal)
1 MHz SPBRG
value
(decimal)
32.768 kHz SPBRG
value
(decimal) KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 NA - - NA - - NA - - 0.30 +1.14 26
1.2 NA - - NA - - 1.20 +0.16 207 1.17 -2.48 6
2.4 NA - - NA - - 2.40 +0.16 103 2.73 +13.78 2
9.6 9.62 +0.16 103 9.62 +0.23 92 9.62 +0.16 25 8.20 -14.67 0
19.2 19.23 +0.16 51 19.04 -0.83 46 19.23 +0.16 12 NA - -
76.8 76.92 +0.16 12 74.57 -2.90 11 83.33 +8.51 2 NA - -
96 1000 +4.17 9 99.43 +3.57 8 83.33 -13.19 2 NA - -
300 333.33 +11.11 2 298.30 -0.57 2 250 -16.67 0 NA - -
500 500 0 1 447.44 -10.51 1 NA - - NA - -
HIGH 1000 - 0 894.89 - 0 250 - 0 8.20 - 0
LOW 3.91 - 255 3.50 - 255 0.98 - 255 0.03 - 255
39500 18C Reference Manual.book Page 6 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39521A-page 21-7
Section 21. Addressable USART
Addressable
USART
21
Table 21-4: Baud Rates for Asynchronous Mode (BRGH = 0)
BAUD
RATE
(Kbps)
FOSC = 40 MHz SPBRG
value
(decimal)
33 MHz SPBRG
value
(decimal)
25 MHz SPBRG
value
(decimal)
20 MHz SPBRG
value
(decimal) KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 NA - - NA - - NA - - NA - -
1.2 NA - - NA - - NA - - NA - -
2.4 NA - - 2.40 -0.07 214 2.40 -0.15 162 2.40 +0.16 129
9.6 9.62 +0.16 64 9.55 -0.54 53 9.53 -0.76 40 9.47 -1.36 32
19.2 18.94 -1.36 32 19.10 -0.54 26 19.53 +1.73 19 19.53 +1.73 15
76.8 78.13 +1.73 7 73.66 -4.09 6 78.13 +1.73 4 78.13 +1.73 3
96 89.29 -6.99 6 103.13 +7.42 4 97.66 +1.73 3 104.17 +8.51 2
300 312.50 +4.17 1 257.81 -14.06 1 NA - - 312.50 +4.17 0
500 625 +25.00 0 NA - - NA - - NA - -
HIGH 625 - 0 515.63 - 0 390.63 - 0 312.50 - 0
LOW 2.44 - 255 2.01 - 255 1.53 - 255 1.22 - 255
BAUD
RATE
(Kbps)
FOSC = 16 MHz SPBRG
value
(decimal)
10 MHz SPBRG
value
(decimal)
7.15909 MHz SPBRG
value
(decimal)
5.0688 MHz SPBRG
value
(decimal) KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 NA - - NA - - NA - - NA - -
1.2 1.20 +0.16 207 1.20 +0.16 129 1.20 +0.23 92 1.20 0 65
2.4 2.40 +0.16 103 2.40 +0.16 64 2.38 -0.83 46 2.40 0 32
9.6 9.62 +0.16 25 9.77 +1.73 15 9.32 -2.90 11 9.90 +3.13 7
19.2 19.23 +0.16 12 19.53 +1.73 7 18.64 -2.90 5 19.80 +3.13 3
76.8 83.33 +8.51 2 78.13 +1.73 1 111.86 +45.65 0 79.20 +3.13 0
96 83.33 -13.19 2 78.13 -18.62 1 NA - - NA - -
300 250 -16.67 0 156.25 -47.92 0 NA - - NA - -
500 NA - - NA - - NA - - NA - -
HIGH 250 - 0 156.25 - 0 111.86 - 0 79.20 - 0
LOW 0.98 - 255 0.61 - 255 0.44 - 255 0.31 - 255
BAUD
RATE
(Kbps)
FOSC = 4 MHz SPBRG
value
(decimal)
3.579545 MHz SPBRG
value
(decimal)
1 MHz SPBRG
value
(decimal)
32.768 kHz SPBRG
value
(decimal) KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 0.30 -0.16 207 0.30 +0.23 185 0.30 +0.16 51 0.26 -14.67 1
1.2 1.20 +1.67 51 1.19 -0.83 46 1.20 +0.16 12 NA - -
2.4 2.40 +1.67 25 2.43 +1.32 22 2.23 -6.99 6 NA - -
9.6 8.93 -6.99 6 9.32 -2.90 5 7.81 -18.62 1 NA - -
19.2 20.83 +8.51 2 18.64 -2.90 2 15.63 -18.62 0 NA - -
76.8 62.50 -18.62 0 55.93 -27.17 0 NA - - NA - -
96 NA - - NA - - NA - - NA - -
300 NA - - NA - - NA - - NA - -
500 NA - - NA - - NA - - NA - -
HIGH 62.50 - 0 55.93 - 0 15.63 - 0 0.51 - 0
LOW 0.24 - 255 0.22 - 255 0.06 - 255 0.002 - 255
39500 18C Reference Manual.book Page 7 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39521A-page 21-8 2000 Microchip Technology Inc.
Table 21-5: Baud Rates for Asynchronous Mode (BRGH = 1)
BAUD
RATE
(Kbps)
FOSC = 40 MHz SPBRG
value
(decimal)
33 MHz SPBRG
value
(decimal)
25 MHz SPBRG
value
(decimal)
20 MHz SPBRG
value
(decimal) KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 NA - - NA - - NA - - NA - -
1.2 NA - - NA - - NA - - NA - -
2.4 NA - - NA - - NA - - NA - -
9.6 NA - - 9.60 -0.07 214 9.59 -0.15 162 9.62 +0.16 129
19.2 19.23 +0.16 129 19.28 +0.39 106 19.30 +0.47 80 19.23 +0.16 64
76.8 75.76 -1.36 32 76.39 -0.54 26 78.13 +1.73 19 78.13 +1.73 15
96 96.15 +0.16 25 98.21 +2.31 20 97.66 +1.73 15 96.15 +0.16 12
300 312.50 +4.17 7 294.64 -1.79 6 312.50 +4.17 4 312.50 +4.17 3
500 500 0 4 515.63 +3.13 3 520.83 +4.17 2 416.67 -16.67 2
HIGH 2500 - 0 2062.50 - 0 1562.50 - 0 1250 - 0
LOW 9.77 - 255 8,06 - 255 6.10 - 255 4.88 - 255
BAUD
RATE
(Kbps)
FOSC = 16 MHz SPBRG
value
(decimal)
10 MHz SPBRG
value
(decimal)
7.15909 MHz SPBRG
value
(decimal)
5.0688 MHz SPBRG
value
(decimal) KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 NA - - NA - - NA - - NA - -
1.2 NA - - NA - - NA - - NA - -
2.4 NA - - NA - - 2.41 +0.23 185 2.40 0 131
9.6 9.62 +0.16 103 9.62 +0.16 64 9.52 -0.83 46 9.60 0 32
19.2 19.23 +0.16 51 18.94 -1.36 32 19.45 +1.32 22 18.64 -2.94 16
76.8 76.92 +0.16 12 78.13 +1.73 7 74.57 -2.90 5 79.20 +3.13 3
96 100 +4.17 9 89.29 -6.99 6 89.49 -6.78 4 105.60 +10.00 2
300 333.33 +11.11 2 312.50 +4.17 1 447.44 +49.15 0 316.80 +5.60 0
500 500 0 1 625 +25.00 0 447.44 -10.51 0 NA - -
HIGH 1000 - 0 625 - 0 447.44 - 0 316.80 - 0
LOW 3.91 - 255 2.44 - 255 1.75 - 255 1.24 - 255
BAUD
RATE
(Kbps)
FOSC = 4 MHz SPBRG
value
(decimal)
3.579545 MHz SPBRG
value
(decimal)
1 MHz SPBRG
value
(decimal)
32.768 kHz SPBRG
value
(decimal) KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR KBAUD
%
ERROR
0.3 NA - - NA - - 0.30 +0.16 207 0.29 -2.48 6
1.2 1.20 +0.16 207 1.20 +0.23 185 1.20 +0.16 51 1.02 -14.67 1
2.4 2.40 +0.16 103 2.41 +0.23 92 2.40 +0.16 25 2.05 -14.67 0
9.6 9.62 +0.16 25 9.73 +1.32 22 8.93 -6.99 6 NA - -
19.2 19.23 +0.16 12 18.64 -2.90 11 20.83 +8.51 2 NA - -
76.8 NA - - 74.57 -2.90 2 62.50 -18.62 0 NA - -
96 NA - - 111.86 +16.52 1 NA - - NA - -
300 NA - - 223.72 -25.43 0 NA - - NA - -
500 NA - - NA - - NA - - NA - -
HIGH 250 - 0 55.93 - 0 62.50 - 0 2.05 - 0
LOW 0.98 - 255 0.22 - 255 0.24 - 255 0.008 - 255
39500 18C Reference Manual.book Page 8 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39521A-page 21-9
Section 21. Addressable USART
Addressable
USART
21
21.4 USART Asynchronous Mode
In this mode, the USART uses standard nonreturn-to-zero (NRZ) format (one start bit, eight or
nine data bits and one stop bit). The most common data format is 8 bits. An on-chip dedicated
8-bit baud rate generator can be used to derive standard baud rate frequencies from the oscillator.
The USART transmits and receives the LSb first. The USART’s transmitter and receiver are
functionally independent, but use the same data format and baud rate. The baud rate generator
produces a clock either x16 or x64 of the bit shift rate, depending on the BRGH bit (TXSTA register).
Parity is not supported by the hardware, but can be implemented in software (stored as
the ninth data bit). Asynchronous mode is stopped during SLEEP.
Asynchronous mode is selected by clearing the SYNC bit (TXSTA register).
The USART Asynchronous module consists of the following important elements:
• Baud Rate Generator
• Sampling Circuit
• Asynchronous Transmitter
• Asynchronous Receiver
21.4.1 USART Asynchronous Transmitter
The USART transmitter block diagram is shown in Figure 21-1. The heart of the transmitter is the
Transmit Shift Register (TSR). The shift register obtains its data from the transmit buffer, TXREG.
The TXREG register is loaded with data in software. The TSR register is not loaded until the
STOP bit has been transmitted from the previous load. As soon as the STOP bit is transmitted,
the TSR is loaded with new data from the TXREG register (if available). Once the TXREG register
transfers the data to the TSR register (occurs in one TCY), the TXREG register is empty and
the TXIF flag bit is set. This interrupt can be enabled/disabled by setting/clearing the TXIE enable
bit. The TXIF flag bit will be set, regardless of the state of the TXIE enable bit and cannot be
cleared in software. It will reset only when new data is loaded into the TXREG register. While the
TXIF flag bit indicated the status of the TXREG register, the TRMT bit (TXSTA register) shows
the status of the TSR register. The TRMT status bit is a read only bit, which is set when the TSR
register is empty. No interrupt logic is tied to this bit, so the user has to poll this bit in order to
determine if the TSR register is empty.
Transmission is enabled by setting the TXEN enable bit (TXSTA register). The actual transmission
will not occur until the TXREG register has been loaded with data and the Baud Rate Generator
(BRG) has produced a shift clock (Figure 21-1). The transmission can also be started by
first loading the TXREG register and then setting the TXEN enable bit. Normally when transmission
is first started, the TSR register is empty, so a transfer to the TXREG register will result in
an immediate transfer to TSR, resulting in an empty TXREG. A back-to-back transfer is thus possible
(Figure 21-3). Clearing the TXEN enable bit during a transmission will cause the transmission
to be aborted and will reset the transmitter. As a result, the TX/CK pin will revert to
hi-impedance.
In order to select 9-bit transmission the TX9 bit (TXSTA register) should be set and the ninth bit
should be written to the TX9D bit (TXSTA register). The ninth bit must be written before writing
the 8-bit data to the TXREG register. This is because a data write to the TXREG register can
result in an immediate transfer of the data to the TSR register (if the TSR is empty). In such a
case, an incorrect ninth data bit may be loaded in the TSR register.
Note 1: The TSR register is not mapped in data memory, so it is not available to the user.
2: When the TXEN bit is set, the TXIF flag bit will also be set since the transmit buffer
is not yet full (can move transmit data to the TXREG register).
39500 18C Reference Manual.book Page 9 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39521A-page 21-10 2000 Microchip Technology Inc.
Figure 21-1: USART Transmit Block Diagram
Steps to follow when setting up an Asynchronous Transmission:
1. Initialize the SPBRG register for the appropriate baud rate. If a high speed baud rate is
desired, set the BRGH bit. (Subsection 21.3 “USART Baud Rate Generator (BRG)” ).
2. Enable the asynchronous serial port by clearing the SYNC bit and setting the SPEN bit.
3. If interrupts are desired, then set the TXIE, GIE/GIEH and PEIE/GIEL bits. Specify the
interrupt priority if required.
4. If 9-bit transmission is desired, then set the TX9 bit (can be used as address/data bit).
5. Enable the transmission by setting the TXEN bit, which will also set the TXIF bit.
6. If 9-bit transmission is selected, the ninth bit should be loaded in the TX9D bit.
7. Load data to the TXREG register (starts transmission).
Figure 21-2: Asynchronous Transmission (8- or 9-bit Data)
TXIF
TXIE
Interrupt
TXEN Baud Rate CLK
SPBRG
Baud Rate Generator
TX9D
MSb LSb
Data Bus
TXREG register
TSR register
(8) 0
TX9
TRMT SPEN
TX/CK pin
Pin Buffer
and Control
8
• • •
8
WORD 1
Stop Bit
WORD 1
Transmit Shift Reg
Start Bit Bit 0 Bit 1 Bit 7/8
Write to TXREG
Word 1 BRG output
(shift clock)
TX/CK pin
TXIF bit
(Transmit buffer
reg. empty flag)
TRMT bit
(Transmit shift
reg. empty flag)
Write to TX9D
(required for 9-bit Word 1
transmissions)
39500 18C Reference Manual.book Page 10 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39521A-page 21-11
Section 21. Addressable USART
Addressable
USART
21
Figure 21-3: Asynchronous Transmission (Back to Back)
Table 21-6: Registers Associated with Asynchronous Transmission
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR,
BOR
Value on
all other
Resets
INTCON GIE/GIEH PEIE/
GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIRx TXIF (1) 0 0
PIEx TXIE (1) 0 0
IPRx TXIP (1) 0 0
RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 000x 0000 000x
TXREG TX7 TX6 TX5 TX4 TX3 TX2 TX1 TX0 0000 0000 0000 0000
TXSTA CSRC TX9 TXEN SYNC — BRGH TRMT TX9D 0000 -010 0000 -010
SPBRG Baud Rate Generator Register 0000 0000 0000 0000
Legend: x = unknown, - = unimplemented locations read as '0'.
Shaded cells are not used for Asynchronous Transmission.
Note 1: The PSPIF, PSPIE and PSPIP bits are reserved on the PIC18C2X2 devices. Always maintain these bits
clear.
2: The position of this bit is device dependent.
Transmit Shift Reg.
Write to TXREG
BRG output
(shift clock)
TX/CK pin
TXIF bit
(interrupt reg. flag)
TRMT bit
(Transmit shift
reg. empty flag)
Word 1 Word 2
WORD 1 WORD 2
Start Bit Stop Bit Start Bit
Transmit Shift Reg.
WORD 1 WORD 2
Bit 0 Bit 1 Bit 7/8 Bit 0
Note: This timing diagram shows two consecutive transmissions.
39500 18C Reference Manual.book Page 11 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39521A-page 21-12 2000 Microchip Technology Inc.
21.4.2 USART Asynchronous Receiver
The receiver block diagram is shown in Figure 21-4. The data is received on the RX/DT pin and
drives the data recovery block. The data recovery block is actually a high speed shifter operating
at x16 times the baud rate, whereas the main receive serial shifter operates at the bit rate or at
FOSC. This mode would typically be used in RS-232 systems.
The USART module has a special provision for multi-processor communication. When the RX9
bit is set in the RCSTA register, 9-bits are received and the ninth bit is placed in the RX9D status
bit of the RSTA register. The port can be programmed such that when the stop bit is received,
the serial port interrupt will only be activated if the RX9D bit is set. This feature is enabled by
setting the ADDEN bit in the RCSTA register and can be used in a multi-processor system in the
following manner.
To transmit a block of data in a multi-processor system, the master processor must first send an
address byte that identifies the target slave. An address byte is identified by the RX9D bit being
a ‘1’ (instead of a ‘0’ for a data byte). If the ADDEN bit is set in the slave’s RCSTA register, all
data bytes will be ignored. However, if the ninth received bit is equal to a ‘1’, indicating that the
received byte is an address, the slave will be interrupted and the contents of the Receive Shift
Register (RSR) will be transferred into the receive buffer. This allows the slave to be interrupted
only by addresses, so that the slave can examine the received byte to see if it is addressed. The
addressed slave will then clear its ADDEN bit and prepare to receive data bytes from the master.
When the ADDEN bit is set, all data bytes are ignored. Following the STOP bit, the data will not
be loaded into the receive buffer and no interrupt will occur. If another byte is shifted into the
RSR register, the previous data byte will be lost.
The ADDEN bit will only take effect when the receiver is configured in 9-bit mode.
Once Asynchronous mode is selected, reception is enabled by setting the CREN bit.
The heart of the receiver is the Receive (serial) Shift Register (RSR). After sampling the RX/TX
pin for the STOP bit, the received data in the RSR is transferred to the RCREG register (if it is
empty). If the transfer is complete, the RCIF flag bit is set. The actual interrupt can be
enabled/disabled by setting/clearing the RCIE enable bit. The RCIF flag bit is a read only bit that
is cleared by the hardware. It is cleared when the RCREG register has been read and is empty.
The RCREG is a double-buffered register (i.e., it is a two-deep FIFO). It is possible for two bytes
of data to be received and transferred to the RCREG FIFO and a third byte begin shifting to the
RSR register. On the detection of the STOP bit of the third byte, if the RCREG register is still full,
overrun error bit, OERR, will be set. The word in the RSR will be lost. The RCREG register can
be read twice to retrieve the two bytes in the FIFO. The OERR bit has to be cleared in software.
This is done by resetting the receive logic (the CREN bit is cleared and then set). If the OERR
bit is set, transfers from the RSR register to the RCREG register are inhibited, so it is essential
to clear the OERR bit if it is set. Framing error bit, FERR, is set if a stop bit is detected as a low
level. The FERR bit and the 9th receive bit are buffered the same way as the receive data. Reading
the RCREG will load the RX9D and FERR bits with new values. Therefore, it is essential for
the user to read the RCSTA register before reading the next RCREG register, in order not to lose
the old (previous) information in the FERR and RX9D bits.
Figure 21-4 shows a block diagram for the receive of the Addressable USART.
39500 18C Reference Manual.book Page 12 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39521A-page 21-13
Section 21. Addressable USART
Addressable
USART
21
Figure 21-4: Addressable USART Receive Block Diagram
x64 Baud Rate CLK
SPBRG
Baud Rate Generator
RX/DT
Pin Buffer
and Control
SPEN
Data
Recovery
CREN
OERR FERR
MSb LSb RSR Register
RX9D RCREG Register FIFO
Interrupt RCIF
RCIE
Data Bus
8
÷ 64
÷ 16
or
Stop Start (8) 7 1 0
RX9
• • •
RX9
ADDEN
RX9
ADDEN
RSR<8>
Enable
Load of
Receive
Buffer
8
8
39500 18C Reference Manual.book Page 13 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39521A-page 21-14 2000 Microchip Technology Inc.
21.4.2.1 Asynchronous Receptions (no Address Detect)
Steps to follow when setting up an Asynchronous Reception:
1. Initialize the SPBRG register for the appropriate baud rate. If a high speed baud rate is
desired, set bit BRGH. (Subsection 21.3 “USART Baud Rate Generator (BRG)” ).
2. Enable the asynchronous serial port by clearing the SYNC bit and setting the SPEN bit.
3. If interrupts are desired, then set the RCIE bit and configure the RCIP, GIE/GIEH and
PEIE/GIEL bits, appropriately.
4. If 9-bit reception is desired, then set the RX9 bit.
5. Enable the reception by setting the CREN bit.
6. The RCIF flag bit will be set when reception is complete. An interrupt will be generated
depending on the configuration of the RCIE, RCIP, GIE/GIEH and PEIE/GIEL bits.
7. Read the RCSTA register to get the ninth bit (if enabled) and determine if any error
occurred during reception.
8. Read the 8-bit received data by reading the RCREG register.
9. If any error occurred, clear the error by clearing the CREN bit.
Figure 21-5: Asynchronous Reception (8- or 9-bit Data)
Start
bit bit0 bit1 bit7/8 bit0 Stop bit7/8 bit
Start
bit
Start
bit7/8 Stop bit
bit
RX (pin)
reg
Rcv buffer reg
Rcv shift
Read Rcv
buffer reg
RCREG
RCIF
(interrupt flag)
OERR bit
CREN
WORD 1
RCREG
WORD 2
RCREG
Stop
bit
Note: This timing diagram shows three words appearing on the RX input. The RCREG (receive buffer) is read after the third word,
causing the OERR (overrun) bit to be set.
39500 18C Reference Manual.book Page 14 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39521A-page 21-15
Section 21. Addressable USART
Addressable
USART
21
21.4.3 Setting up 9-bit mode with Address Detect
Address detect mode allows an Addressable USART node to ignore all data on the bus until a
new address byte is present. This reduces the interrupt overhead since not every byte will generate
an interrupt (only bytes that are directed to that node).
21.4.3.1 Transmit
Steps to follow when setting up an Asynchronous Transmission:
1. Initialize the SPBRG register for the appropriate baud rate. If a high speed baud rate is
desired, set the BRGH bit. (Subsection 21.3 “USART Baud Rate Generator (BRG)” ).
2. Enable the asynchronous serial port by clearing the SYNC bit and setting the SPEN bit.
3. If interrupts are desired, then set the TXIE, TXIP, GIE/GIEH and PEIE/GIEL bits.
4. If 9-bit transmission is desired, then set the TX9 bit (can be used as address/data bit).
5. Enable the transmission by setting the TXEN bit, which will also set the TXIF bit.
6. If 9-bit transmission is selected, set the TX9D bit for address, clear the TX9D bit for data,
set the TX9D bit for address and clear the TX9D bit for data.
7. Load data to the TXREG register (starts transmission).
21.4.3.2 Receive
Steps to follow when setting up an Asynchronous Reception with Address Detect enabled:
1. Initialize the SPBRG register for the appropriate baud rate. If a high speed baud rate is
desired, set bit BRGH.
2. Enable the asynchronous serial port by clearing bit SYNC and setting bit SPEN.
3. If interrupts are desired, then set the RCIE bit and configure the RCIP, GIE/GIEH and
PEIE/GIEL bits, appropriately.
4. Set bit RX9 to enable 9-bit reception.
5. Set ADDEN to enable address detect.
6. Enable the reception by setting enable bit CREN.
7. The RCIF flag bit will be set when reception is complete. An interrupt will be generated
depending on the configuration of the RCIE, RCIP, GIE/GIEH and PEIE/GIEL bits.
8. Read the RCSTA register to get the ninth bit and determine if any error occurred during
reception.
9. Read the 8-bit received data by reading the RCREG register, to determine if the device is
being addressed.
10. If any error occurred, clear the error by clearing enable bit CREN.
11. If the device has been addressed, clear the ADDEN bit to allow data bytes and address
bytes to be read into the receive buffer, and interrupt the CPU.
39500 18C Reference Manual.book Page 15 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39521A-page 21-16 2000 Microchip Technology Inc.
Figure 21-6: USART Receive Block Diagram
Figure 21-7: Asynchronous Reception with Address Detect
Figure 21-8: Asynchronous Reception with Address Byte First
x64 Baud Rate CLK
SPBRG
Baud Rate Generator
RX/DT
Pin Buffer
and Control
SPEN
Data
Recovery
CREN
OERR FERR
MSb RSR Register LSb
RX9D RCREG Register FIFO
Interrupt RCIF
RCIE
Data Bus
8
÷ 64
÷ 16
or
Stop (8) 7 1 0 Start
RX9
• • •
RX9
ADDEN
RX9
ADDEN
RSR<8>
Enable
Load of
Receive
Buffer
8
8
Start
bit bit0 bit1 bit8 bit0 Stop
bit
Start
bit bit8 Stop
bit
RX/DT (pin)
reg
Rcv buffer reg
Rcv shift
Read Rcv
buffer reg
RCREG
RCIF
(interrupt flag)
WORD 1
RCREG
Note: This timing diagram shows a data byte followed by an address byte. The data byte is not read into the RCREG (receive buffer)
Bit8 = 0, Data Byte Bit8 = 1, Address Byte
because ADDEN = 0.
Start
bit bit0 bit1 bit8 bit0 Stop
bit
Start
bit bit8 Stop
bit
RX/DT (pin)
reg
Rcv buffer reg
Rcv shift
Read Rcv
buffer reg
RCREG
RCIF
(interrupt flag)
WORD 1
RCREG Bit8 = 1, Address Byte Bit8 = 0, Data Byte
Note: This timing diagram shows an address byte followed by an data byte. The data byte is not read into the RCREG (receive buffer)
because ADDEN was not updated and still = 0.
39500 18C Reference Manual.book Page 16 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39521A-page 21-17
Section 21. Addressable USART
Addressable
USART
21
21.4.4 Sampling
The data on the RX/DT pin is sampled three times by a majority detect circuit to determine if a
high or a low level is present at the RX pin. Figure 21-9 shows the waveform for the sampling
circuit. The sampling operates the same regardless of the state of the BRGH bit, only the source
of the x16 clock is different.
Figure 21-9: RX Pin Sampling Scheme, BRGH = 0 or BRGH = 1
Table 21-7: Registers Associated with Asynchronous Reception
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR,
BOR
Value on
all other
Resets
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIRx RCIF (1) 0 0
PIEx RCIE (1) 0 0
IPRx RCIP (1) 0 0
RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 000x 0000 000x
RCREG RX7 RX6 RX5 RX4 RX3 RX2 RX1 RX0 0000 0000 0000 0000
TXSTA CSRC TX9 TXEN SYNC — BRGH TRMT TX9D 0000 -010 0000 -010
SPBRG Baud Rate Generator Register 0000 0000 0000 0000
Legend: x = unknown, - = unimplemented locations read as '0'.
Shaded cells are not used for Asynchronous Reception.
Note 1: The position of this bit is device dependent.
RX
baud CLK
x16 CLK
Start bit Bit0
Samples
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3
Baud CLK for all but start bit
(RX/DT pin)
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PIC18C Reference Manual
DS39521A-page 21-18 2000 Microchip Technology Inc.
21.5 USART Synchronous Master Mode
In Synchronous Master mode, the data is transmitted in a half-duplex manner, (i.e., transmission
and reception do not occur at the same time). When transmitting data, the reception is inhibited
and vice versa. Synchronous mode is entered by setting the SYNC bit. In addition, the SPEN
enable bit is set in order to configure the TX/CK and RX/DT I/O pins to CK (clock) and DT (data)
lines respectively. The Master mode indicates that the processor transmits the master clock on
the CK line. The Master mode is entered by setting the CSRC bit.
21.5.1 USART Synchronous Master Transmission
The USART transmitter block diagram is shown in Figure 21-1. The heart of the transmitter is the
Transmit Shift Register (TSR). The shift register obtains its data from the read/write transmit
buffer register TXREG. The TXREG register is loaded with data in software. The TSR register is
not loaded until the last bit has been transmitted from the previous load. As soon as the last bit
is transmitted, the TSR is loaded with new data from the TXREG (if available). Once the TXREG
register transfers the data to the TSR register (occurs in one Tcycle), the TXREG is empty and
the TXIF interrupt flag bit is set. The interrupt can be enabled/disabled by setting/clearing the
TXIE enable bit. The TXIF flag bit will be set regardless of the state of the TXIE enable bit and
cannot be cleared in software. It will reset only when new data is loaded into the TXREG register.
While the TXIF flag bit indicates the status of the TXREG register, the TRMT bit shows the status
of the TSR register. The TRMT bit is a read only bit that is set when the TSR is empty. No interrupt
logic is tied to this bit, so the user has to poll this bit in order to determine if the TSR register is
empty. The TSR is not mapped in data memory, so it is not available to the user.
Transmission is enabled by setting the TXEN bit. The actual transmission will not occur until the
TXREG register has been loaded with data. The first data bit will be shifted out on the next available
rising edge of the clock on the CK line. Data out is stable at the falling edge of the synchronous
clock (Figure 21-10). The transmission can also be started by first loading the TXREG
register and then setting the TXEN bit. This is advantageous when slow baud rates are selected,
since the BRG is kept in RESET when the TXEN, CREN and SREN bits are clear. Setting the
TXEN bit will start the BRG, creating a shift clock immediately. Normally, when transmission is
first started, the TSR register is empty, so a transfer to the TXREG register will result in an immediate
transfer to TSR, resulting in an empty TXREG. Back-to-back transfers are possible.
Clearing the TXEN bit during a transmission will cause the transmission to be aborted and will
reset the transmitter. The DT and CK pins will revert to hi-impedance. If either of the CREN or
SREN bits are set during a transmission, the transmission is aborted and the DT pin reverts to a
hi-impedance state (for a reception). The CK pin will remain an output if the CSRC bit is set (internal
clock). The transmitter logic is not reset although it is disconnected from the pins. In order to
reset the transmitter, the user has to clear the TXEN bit. If the SREN bit is set (to interrupt an
on-going transmission and receive a single word), then after the single word is received, the
SREN bit will be cleared and the serial port will revert back to transmitting, since the TXEN bit is
still set. The DT line will immediately switch from hi-impedance receive mode to transmit and start
driving. To avoid this, the TXEN bit should be cleared.
In order to select 9-bit transmission, the TX9 bit should be set and the ninth bit should be written
to the TX9D bit. The ninth bit must be written before writing the 8-bit data to the TXREG register.
This is because a data write to the TXREG can result in an immediate transfer of the data to the
TSR register (if the TSR is empty). If the TSR was empty and the TXREG was written before writing
the “new” value to the TX9D bit, the “present” value of the TX9D bit is loaded.
39500 18C Reference Manual.book Page 18 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39521A-page 21-19
Section 21. Addressable USART
Addressable
USART
21
Steps to follow when setting up a Synchronous Master Transmission:
1. Initialize the SPBRG register for the appropriate baud rate. (Subsection 21.3 “USART
Baud Rate Generator (BRG)” ).
2. Enable the synchronous master serial port by setting the SYNC, SPEN and CSRC bits.
3. If interrupts are desired, then set the TXIE bit and configure the RCIP, GIE/GIEH and
PEIE/GIEL bits, appropriately.
4. If 9-bit transmission is desired, then set the TX9 bit.
5. Enable the transmission by setting the TXEN bit.
6. If 9-bit transmission is selected, the ninth bit should be loaded in the TX9D bit.
7. Start transmission by loading data to the TXREG register.
Table 21-8: Registers Associated with Synchronous Master Transmission
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR,
BOR
Value on all
other
Resets
INTCON GIE/GIEH PEIE/
GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIRx TXIF (1) 0 0
PIEx TXIE (1) 0 0
IPRx TXIP (1) 0 0
RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 -00x 0000 -00x
TXREG TX7 TX6 TX5 TX4 TX3 TX2 TX1 TX0 0000 0000 0000 0000
TXSTA CSRC TX9 TXEN SYNC — BRGH TRMT TX9D 0000 -010 0000 -010
SPBRG Baud Rate Generator Register 0000 0000 0000 0000
Legend: x = unknown, — = unimplemented, read as '0'.
Shaded cells are not used for Synchronous Master Transmission.
Note 1: The position of this bit is device dependent.
39500 18C Reference Manual.book Page 19 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39521A-page 21-20 2000 Microchip Technology Inc.
Figure 21-10:Synchronous Transmission
Figure 21-11:Synchronous Transmission (Through TXEN)
Bit 0 Bit 1 Bit 7
WORD 1
Q1Q2 Q3Q4 Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2 Q3Q4 Q3Q4 Q1Q2 Q3Q4 Q1Q2 Q3Q4 Q1Q2 Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4
RX/DT pin Bit 2 Bit 0 Bit 1 Bit 7
TX/CK pin
Write to
TXREG reg
TRMT
TXEN bit '1' '1'
Note: Sync Master mode; SPBRG = '0'. Continuous transmission of two 8-bit words.
WORD 2
TRMT bit
Write word1 Write word2
TXIF bit
(Interrupt flag)
RX/DT pin
TX/CK pin
Write to
TXREG reg
TXIF bit
TRMT bit
bit0 bit1 bit2 bit6 bit7
TXEN bit
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2000 Microchip Technology Inc. DS39521A-page 21-21
Section 21. Addressable USART
Addressable
USART
21
21.5.1.1 USART Synchronous Master Reception
Once Synchronous mode is selected, reception is enabled by setting either the SREN or CREN
bits. Data is sampled on the RX/DT pin on the falling edge of the clock. If the SREN bit is set,
then only a single word is received. If the CREN bit is set, the reception is continuous until the
CREN bit is cleared. If both bits are set, then the CREN bit takes precedence. After clocking the
last serial data bit, the received data in the Receive Shift Register (RSR) is transferred to the
RCREG register (if it is empty). When the transfer is complete, the RCIF interrupt flag bit is set.
The actual interrupt can be enabled/disabled by setting/clearing the RCIE enable bit. The RCIF
flag bit is a read only bit that is cleared by the hardware. In this case, it is cleared when the
RCREG register has been read and is empty. The RCREG is a double buffered register (i.e., it
is a two-deep FIFO). It is possible for two bytes of data to be received and transferred to the
RCREG FIFO and a third byte to begin shifting into the RSR register. On the clocking of the last
bit of the third byte, if the RCREG register is still full, then the overrun error bit, OERR, is set and
the word in the RSR is lost. The RCREG register can be read twice to retrieve the two bytes in
the FIFO. The OERR bit has to be cleared in software (by clearing the CREN bit). If the OERR
bit is set, transfers from the RSR to the RCREG are inhibited, so it is essential to clear the OERR
bit if it is set. The 9th receive bit is buffered the same way as the receive data. Reading the
RCREG register will load the RX9D bit with a new value; therefore, it is essential for the user to
read the RCSTA register before reading RCREG in order to not lose the old (previous) information
in the RX9D bit.
Steps to follow when setting up a Synchronous Master Reception:
1. Initialize the SPBRG register for the appropriate baud rate. (Subsection 21.3 “USART
Baud Rate Generator (BRG)” )
2. Enable the synchronous master serial port by setting the SYNC, SPEN and CSRC bits.
3. Ensure that the CREN and SREN bits are clear.
4. If interrupts are desired, then set the RCIE bit and configure the RCIP, GIE/GIEH and
PEIE/GIEL bits, appropriately.
5. If 9-bit reception is desired, then set the RX9 bit.
6. If a single reception is required, set the SREN bit. For continuous reception, set the CREN
bit.
7. The RCIF bit will be set when reception is complete and an interrupt will be generated if
the RCIE bit is set.
8. Read the RCSTA register to get the ninth bit (if enabled) and determine if any error
occurred during reception.
9. Read the 8-bit received data by reading the RCREG register.
10. If any error occurred, clear the error by clearing the CREN bit.
Table 21-9: Registers Associated with Synchronous Master Reception
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other Resets
INTCON GIE/
GIEH
PEIE/
GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIRx RCIF (1) 0 0
PIEx RCIE (1) 0 0
IPRx RCIP (1) 0 0
RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 000x 0000 000x
RCREG RX7 RX6 RX5 RX4 RX3 RX2 RX1 RX0 0000 0000 0000 0000
TXSTA CSRC TX9 TXEN SYNC — BRGH TRMT TX9D 0000 -010 0000 -010
SPBRG Baud Rate Generator Register 0000 0000 0000 0000
Legend: x = unknown, - = unimplemented read as '0'.
Shaded cells are not used for Synchronous Master Reception.
Note 1: The position of this bit is device dependent.
39500 18C Reference Manual.book Page 21 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39521A-page 21-22 2000 Microchip Technology Inc.
Figure 21-12: Synchronous Reception (Master Mode, SREN)
CREN bit
RX/DT pin
TX/CK pin
Write to
SREN bit
SREN bit
RCIF bit
(interrupt)
Read
RXREG
Note: Timing diagram demonstrates SYNC Master mode with SREN = '1' and BRG = '0'.
Q2 Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
'0'
bit0 bit1 bit2 bit3 bit4 bit5 bit6 bit7
Q1 Q2 Q3 Q4
’0’
39500 18C Reference Manual.book Page 22 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39521A-page 21-23
Section 21. Addressable USART
Addressable
USART
21
21.6 USART Synchronous Slave Mode
Synchronous slave mode differs from the Master mode in the fact that the shift clock is supplied
externally at the TX/CK pin (instead of being supplied internally in Master mode). This allows the
device to transfer or receive data while in SLEEP mode. Slave mode is entered by clearing the
CSRC bit (TXSTA<7>).
21.6.1 USART Synchronous Slave Transmit
The operation of the Synchronous Master and Slave modes are identical, except in the case of
the SLEEP mode.
If two words are written to the TXREG and then the SLEEP instruction is executed, the following
will occur:
a) The first word will immediately transfer to the TSR register and transmit.
b) The second word will remain in TXREG register.
c) The TXIF flag bit will not be set.
d) When the first word has been shifted out of TSR, the TXREG register will transfer the second
word to the TSR and the TXIF flag bit will now be set.
e) If the TXIE enable bit is set, the interrupt will wake the chip from SLEEP and if the global
interrupt is enabled, the program will branch to the interrupt vector.
Steps to follow when setting up a Synchronous Slave Transmission:
1. Enable the synchronous slave serial port by setting the SYNC and SPEN bits and clearing
the CSRC bit.
2. Clear the CREN and SREN bits.
3. If interrupts are desired, then set the TXIE enable bit and configure the RCIP, GIE/GIEH
and PEIE/GIEL bits, appropriately.
4. If 9-bit transmission is desired, then set the TX9 bit.
5. Enable the transmission by setting the TXEN enable bit.
6. If 9-bit transmission is selected, the ninth bit should be loaded into the TX9D bit.
7. Start transmission by loading data to the TXREG register.
Table 21-10: Registers Associated with Synchronous Slave Transmission
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other Resets
INTCON GIE/
GIEH
PEIE/
GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIRx TXIF (1) 0 0
PIEx TXIE (1) 0 0
IPRx TXIP (1) 0 0
RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 000x 0000 000x
TXREG TX7 TX6 TX5 TX4 TX3 TX2 TX1 TX0 0000 0000 0000 0000
TXSTA CSRC TX9 TXEN SYNC — BRGH TRMT TX9D 0000 -010 0000 -010
SPBRG Baud Rate Generator Register 0000 0000 0000 0000
Legend: x = unknown, - = unimplemented read as '0'.
Shaded cells are not used for Synchronous Slave Transmission.
Note 1: The position of this bit is device dependent.
39500 18C Reference Manual.book Page 23 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39521A-page 21-24 2000 Microchip Technology Inc.
21.6.2 USART Synchronous Slave Reception
The operation of the Synchronous Master and Slave modes is identical, except in the case of the
SLEEP mode. Also, bit SREN is a "don't care" in Slave mode.
If receive is enabled, by setting the CREN bit prior to the SLEEP instruction, then a word may be
received during SLEEP. On completely receiving the word, the RSR register will transfer the data
to the RCREG register and if the RCIE enable bit bit is set, the interrupt generated will wake the
chip from SLEEP. If the global interrupt is enabled, the program will branch to the appropriate
interrupt vector.
Steps to follow when setting up a Synchronous Slave Reception:
1. Enable the synchronous master serial port by setting the SYNC and SPEN bits and clearing
the CSRC bit.
2. If interrupts are desired, then set the RCIE enable bit and configure the RCIP, GIE/GIEH
and PEIE/GIEL bits, appropriately.
3. If 9-bit reception is desired, then set the RX9 bit.
4. To enable reception, set the CREN enable bit.
5. The RCIF bit will be set when reception is complete and an interrupt will be generated, if
the RCIE bit is set.
6. Read the RCSTA register to get the ninth bit (if enabled) and determine if any error
occurred during reception.
7. Read the 8-bit received data by reading the RCREG register.
8. If any error occurred, clear the error by clearing the CREN bit.
Table 21-11: Registers Associated with Synchronous Slave Reception
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on:
POR,
BOR
Value on all
other Resets
INTCON GIE/
GIEH
PEIE/
GIEL
TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000u
PIRx RCIF (1) 0 0
PIEx RCIE (1) 0 0
IPRx RCIP (1) 0 0
RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 000x 0000 000x
RCREG RX7 RX6 RX5 RX4 RX3 RX2 RX1 RX0 0000 0000 0000 0000
TXSTA CSRC TX9 TXEN SYNC — BRGH TRMT TX9D 0000 -010 0000 -010
SPBRG Baud Rate Generator Register 0000 0000 0000 0000
Legend: x = unknown, - = unimplemented read as '0'.
Shaded cells are not used for Synchronous Slave Reception.
Note 1: The position of this bit is device dependent.
39500 18C Reference Manual.book Page 24 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39521A-page 21-25
Section 21. Addressable USART
Addressable
USART
21
21.7 Initialization
Example 21-2 is an initialization routine for Asynchronous Transmitter/Receiver mode.
Example 21-3 is for the Synchronous mode. In both examples, the data is 8 bits, and the value
to load into the SPBRG register is dependent on the desired baud rate and the device frequency.
Example 21-4 is an initialization of the Addressable USART in 9-bit address detect mode.
Example 21-2: Asynchronous Transmitter/Receiver
Example 21-3: Synchronous Transmitter/Receiver
Example 21-4: Asynchronous 9-bit Transmitter/Receiver (Address Detect Enabled)
MOVLW baudrate ; Set Baudrate
MOVWF SPBRG
MOVLW 0x20 ; 8-bit transmit, transmitter enabled,
MOVWF TXSTA ; asynchronous mode, low speed mode
CLRF PIR1 ; Clear all iterrupt flags
; including AUSART TX & RX
BSF PIE1,TXIE ; Enable transmit interrupts
BSF PIE1,RCIE ; Enable receive interrupts
MOVLW 0x90 ; 8-bit receive, receiver enabled,
MOVWF RCSTA ; serial port enabled
MOVLW baudrate ; Set Baudrate
MOVWF SPBRG
MOVLW 0xB0 ; Synchronous Master,8-bit transmit,
MOVWF TXSTA ; transmitter enabled, low speed mode
CLRF PIR1 ; Clear all iterrupt flags
; including AUSART TX & RX
BSF PIE1,TXIE ; Enable transmit interrupts
BSF PIE1,RCIE ; Enable receive interrupts
MOVLW 0x90 ; 8-bit receive, receiver enabled,
MOVWF RCSTA ; continuous receive, serial port enabled
MOVLW baudrate ; Set Baudrate
MOVWF SPBRG
MOVLW 0x60 ; 9-bit transmit, transmitter enabled,
MOVWF TXSTA ; asynchronous mode, low speed mode
CLRF PIR1 ; Clear all iterrupt flags
; including AUSART TX & RX
BSF PIE1,TXIE ; Enable transmit interrupts
BSF PIE1,RCIE ; Enable receive interrupts
MOVLW 0xD8 ; 9-bit, Address Detect Enable
MOVWF RCSTA ; serial port enabled
39500 18C Reference Manual.book Page 25 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39521A-page 21-26 2000 Microchip Technology Inc.
21.8 Design Tips
Question 1: Using the Asynchronous mode I am getting a lot of transmission errors.
Answer 1:
The most common reasons are
1. You have incorrectly calculated the value to load in to the SPBRG register.
2. The sum of the baud errors for the transmitter and receiver is too high.
Question 2: The PICmicro device is not receiving the data transmitted even though
there are good levels on the Addressable USART pins.
Answer 2:
Ensure that the Address Detect Enable bit is at the desired setting.
39500 18C Reference Manual.book Page 26 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39521A-page 21-27
Section 21. Addressable USART
Addressable
USART
21
21.9 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is, they may be written for
the Base-Line, the Mid-Range or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to this
section are:
Title Application Note #
Serial Port Utilities AN547
Servo Control of a DC Brush Motor AN532
Brush-DC Servomotor Implementation using PIC17C756A AN718
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
39500 18C Reference Manual.book Page 27 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39521A-page 21-28 2000 Microchip Technology Inc.
21.10 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Addressable USART module description.
39500 18C Reference Manual.book Page 28 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39522A-page 22-1
CAN
22
Section 22. CAN
HIGHLIGHTS
This section of the manual contains the following major topics:
22.1 Introduction .................................................................................................................. 22-2
22.2 Control Registers for the CAN Module......................................................................... 22-3
22.3 CAN Overview ........................................................................................................... 22-28
22.4 CAN Bus Features ..................................................................................................... 22-32
22.5 CAN Module Implementation ..................................................................................... 22-33
22.6 Frame Types .............................................................................................................. 22-37
22.7 Modes of Operation ................................................................................................... 22-44
22.8 CAN Bus Initialization ................................................................................................ 22-48
22.9 Message Reception ................................................................................................... 22-49
22.10 Transmission .............................................................................................................. 22-60
22.11 Error Detection........................................................................................................... 22-69
22.12 Baud Rate Setting...................................................................................................... 22-71
22.13 Interrupts.................................................................................................................... 22-75
22.14 Timestamping ............................................................................................................ 22-77
22.15 CAN Module I/O......................................................................................................... 22-77
22.16 Design Tips ................................................................................................................ 22-78
22.17 Related Application Notes.......................................................................................... 22-79
22.18 Revision History ......................................................................................................... 22-80
39500 18C Reference Manual.book Page 1 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39522A-page 22-2 2000 Microchip Technology Inc.
22.1 Introduction
The Controller Area Network (CAN) module is a serial interface useful for communicating with
other peripherals or microcontroller devices. This interface/protocol was designed to allow communications
within noisy environments. Figure 22-1 shows an example CAN Bus network.
Figure 22-1: Example CAN Bus Network
MCP2510
SPI
MCP2510
INTERFACE
CAN
BUS
CAN
Transceiver
PICmicro
Controller
CAN
Transceiver
CAN
Transceiver
CAN
Transceiver
CAN
Transceiver
PICmicro
Controller
PIC18CXX8
with CAN
PIC18CXX8
with integrated
PIC18CXX8
with integrated
Microchip Microchip
CAN CAN
39500 18C Reference Manual.book Page 2 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39522A-page 22-3
Section 22. CAN
CAN
22
22.2 Control Registers for the CAN Module
There are many registers associated with the CAN module. Descriptions of these registers are
grouped into sections. These sections are:
• Control and Status Registers
• Transmit Buffer Registers
• Receive Buffer Registers
• Baud Rate Control Registers
• Interrupt Status and Control Registers
22.2.1 CAN Control and Status Registers
This section shows the CAN Control and Status registers.
Register 22-1: CANCON: CAN Control Register
R/W-1 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0
REQOP2 REQOP1 REQOP0 ABAT WIN2 WIN1 WIN0 —
bit 7 bit 0
bit 7 - 5 REQOP2:REQOP0: Request CAN Operation mode bits
1xx = Request Configuration mode
011 = Request Listen Only mode
010 = Request Loopback mode
001 = Request Disable mode
000 = Request Normal mode
bit 4 ABAT: Abort All Pending Transmissions bit
1 = Abort All Pending Transmissions (in all transmit buffers)
0 = Transmissions proceeding as normal, or all Transmissions aborted
Note: This bit will automatically be cleared when all transmissions are aborted.
bit 3 - 1 WIN2:WIN0: Window Address bits
This selects which of the CAN buffers to switch into the access bank area. This allows access
to the buffer registers from any data memory bank. After a frame has caused an interrupt, the
ICODE2:ICODE0 bits can be copied to the WIN2:WIN0 bits to select the correct buffer.
111 = Receive Buffer 0
110 = Receive Buffer 0
101 = Receive Buffer 1
100 = Transmit Buffer 0
011 = Transmit Buffer 1
010 = Transmit Buffer 2
001 = Receive Buffer 0
000 = Receive Buffer 0
bit 0 Unimplemented: Read as ’0’
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Register 22-2: CANSTAT: CAN Status Register
R-1 R-0 R-0 U-0 R-0 R-0 R-0 U-0
OPMODE2 OPMODE1 OPMODE0 — ICODE2 ICODE1 ICODE0 —
bit 7 bit 0
bit 7-5 OPMODE2:OPMODE0: Operation Mode Status bits
111 = Reserved
110 = Reserved
101 = Reserved
100 = Configuration mode
011 = Listen Only mode
010 = Loopback mode
001 = Disable mode
000 = Normal mode
Note: Before the device goes into SLEEP mode, select Disable Mode.
bit 4 Unimplemented: Read as ’0’
bit 3-1 ICODE2:ICODE0: Interrupt Code bits
When an interrupt occurs, a prioritized coded Interrupt value will be present in the
ICODE2:ICODE0 bits. These codes indicate the source of the interrupt. The ICODE2:ICODE0
bits can be copied to the WIN2:WIN0 bits to select the correct buffer to map into the Access
Bank area.
111 = Wake-up on Interrupt
110 = RXB0 Interrupt
101 = RXB1 Interrupt
100 = TXB0 Interrupt
011 = TXB1 Interrupt
010 = TXB2 Interrupt
001 = Error Interrupt
000 = No Interrupt
bit 0 Unimplemented: Read as ’0’
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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2000 Microchip Technology Inc. DS39522A-page 22-5
Section 22. CAN
CAN
22
Register 22-3: COMSTAT: Communication Status Register
R/C-0 R/C-0 R-0 R-0 R-0 R-0 R-0 R-0
RX0OVFL RX1OVFL TXBO TXBP RXBP TXWARN RXWARN EWARN
bit 7 bit 0
bit 7 RX0OVFL: Receive Buffer 0 Overflow bit
1 = Receive Buffer 0 Overflowed
0 = Receive Buffer 0 has not overflowed.
bit 6 RX1OVFL: Receive Buffer 1 Overflow bit
1 = Receive Buffer 1 Overflowed
0 = Receive Buffer 1 has not overflowed
bit 5 TXB0: Transmitter Bus Off bit
1 = Transmit Error Counter > 255
0 = Transmit Error Counter ≤ 255
bit 4 TXBP: Transmitter Bus Passive bit
1 = Transmission Error Counter >127
0 = Transmission Error Counter ≤127
bit 3 RXBP: Receiver Bus Passive bit
1 = Receive Error Counter > 127
0 = Receive Error Counter ≤127
bit 2 TXWARN: Transmitter Warning bit
1 = Transmit Error Counter > 95
0 = Transmit Error Counter ≤ 95
bit 1 RXWARN: Receiver Warning bit
1 = Receive Error Counter > 95
0 = Receive Error Counter ≤ 95
bit 0 EWARN: Error Warning bit
This bit is a flag of the RXWARN and TXWARN bits
1 = The RXWARN or the TXWARN bits are set
0 = Neither the RXWARN or the TXWARN bits are set
Legend
R = Readable bit C = Clearable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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DS39522A-page 22-6 2000 Microchip Technology Inc.
22.2.2 CAN Transmit Buffer Registers
This section describes the CAN Transmit Buffer Register and the associated Transmit Buffer
Control Registers.
Register 22-4: TXB0CON: Transmit Buffer 0 Control Register
TXB1CON: Transmit Buffer 1 Control Register
TXB2CON: Transmit Buffer 2 Control Register
U-0 R-0 R-0 R-0 R/W-0 U-0 R/W-0 R/W-0
— TXABT TXLARB TXERR TXREQ — TXPRI1 TXPRI0
bit 7 bit 0
bit 7 Unimplemented: Read as ’0’
bit 6 TXABT: Transmission Aborted Status bit
1 = Message was aborted
0 = Message completed transmission successfully
bit 5 TXLARB: Transmission Lost Arbitration Status bit
1 = Message lost arbitration while being sent
0 = Message did not lose arbitration while being sent
bit 4 TXERR: Transmission Error detected Status bit
1 = A bus error occurred while the message was being sent
0 = A bus error did not occur while the message was being sent
bit 3 TXREQ: Transmit Request Status bit
1 = Requests sending a message. Clears the TXABT, TXLARB, and TXERR bits.
0 = Automatically cleared when the message is successfully sent
Note: Clearing this bit in software, while the bit is set will request a message abort.
bit 2 Unimplemented: Read as ’0’
bit 1:0 TXPRI1:TXPRI0: Transmit Priority bits
11 = Priority Level 3 (Highest Priority)
10 = Priority Level 2
01 = Priority Level 1
00 = Priority Level 0 (Lowest Priority)
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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2000 Microchip Technology Inc. DS39522A-page 22-7
Section 22. CAN
CAN
22
Register 22-5: TXB0SIDH: Transmit Buffer 0 Standard Identifier High Byte Register
TXB1SIDH: Transmit Buffer 1 Standard Identifier High Byte Register
TXB2SIDH: Transmit Buffer 2 Standard Identifier High Byte Register
Register 22-6: TXB0SIDL: Transmit Buffer 0 Standard Identifier Low Byte Register
TXB1SIDL: Transmit Buffer 1 Standard Identifier Low Byte Register
TXB2SIDL: Transmit Buffer 2 Standard Identifier Low Byte Register
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID3
bit 7 bit 0
bit 7-0 SID10:SID3: Standard Identifier bits
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
SID2 SID1 SID0 — EXIDEN — EID17 EID16
bit 7 bit 0
bit 7-5 SID2:SID0: Standard Identifier bits
bit 4 Unimplemented: Read as ’0’
bit 3 EXIDEN: Extended Identifier Enable bit
1 = Message will transmit Extended ID
0 = Message will transmit Standard ID
bit 2 Unimplemented: Read as ’0’
bit 1-0 EID17:EID16: Extended Identifier bits
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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DS39522A-page 22-8 2000 Microchip Technology Inc.
Register 22-7: TXB0EIDH: Transmit Buffer 0 Extended Identifier High Byte Register
TXB1EIDH: Transmit Buffer 1 Extended Identifier High Byte Register
TXB2EIDH: Transmit Buffer 2 Extended Identifier High Byte Register
Register 22-8: TXB0EIDL: Transmit Buffer 0 Extended Identifier Low Byte Register
TXB1EIDL: Transmit Buffer 1 Extended Identifier Low Byte Register
TXB2EIDL: Transmit Buffer 2 Extended Identifier Low Byte Register
Register 22-9: TXB0Dm: Transmit Buffer 0 Data Field Byte m Register
TXB1Dm: Transmit Buffer 1 Data Field Byte m Register
TXB2Dm: Transmit Buffer 2 Data Field Byte m Register
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8
bit 7 bit 0
bit 7-0 EID15:EID8: Extended Identifier bits EID15 to EID8
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0
bit 7 bit 0
bit 7-0 EID7:EID0: Extended Identifier bits EID7 to EID0
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
TXBnDm7 TXBnDm6 TXBnDm5 TXBnDm4 TXBnDm3 TXBnDm2 TXBnDm1 TXBnDm0
bit 7 bit 0
bit 1-0 TXBnDm7:TXBnDm0: Transmit Buffer n Data Field Byte m bits (where 0 < n < 3 and 0 < m < 8)
Each Transmit Buffer has an array of registers. For example Transmit buffer 0 has 7 registers:
TXB0D1 to TXB0D7.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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2000 Microchip Technology Inc. DS39522A-page 22-9
Section 22. CAN
CAN
22
Register 22-10: TXB0DLC: Transmit Buffer 0 Data Length Code Register
TXB1DLC: Transmit Buffer 1 Data Length Code Register
TXB2DLC: Transmit Buffer 2 Data Length Code Register
Register 22-11: TXERRCNT: Transmit Error Count Register
U-0 R/W-x U-0 U-0 R/W-x R/W-x R/W-x R/W-x
— TXRTR — — DLC3 DLC2 DLC1 DLC0
bit 7 bit 0
bit 7 Unimplemented: Read as ’0’
bit 6 TXRTR: Transmission Frame Remote Transmission Request bit
1 = Transmitted Message will have TXRTR bit set
0 = Transmitted Message will have TXRTR bit cleared.
bit 5-4 Unimplemented: Read as ’0’
bit 3-0 DLC3:DLC0: Data Length Code bits
1111 = Reserved
1110 = Reserved
1101 = Reserved
1100 = Reserved
1011 = Reserved
1010 = Reserved
1001 = Reserved
1000 = Data Length = 8 bytes
0111 = Data Length = 7 bytes
0110 = Data Length = 6 bytes
0101 = Data Length = 5 bytes
0100 = Data Length = 4 bytes
0011 = Data Length = 3 bytes
0010 = Data Length = 2 bytes
0001 = Data Length = 1 bytes
0000 = Data Length = 0 bytes
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
TEC7 TEC6 TEC5 TEC4 TEC3 TEC2 TEC1 TEC0
bit 7 bit 0
bit 7-0 TEC7:TEC0: Transmit Error Counter bits
This register contains a value which is derived from the rate at which errors occur. When the
error count overflows, the bus off state occurs. When the bus has an occurrence of 11 consecutive
recessive bits, the counter value is cleared.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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DS39522A-page 22-10 2000 Microchip Technology Inc.
22.2.3 CAN Receive Buffer Registers
This section shows the Receive buffer registers with their associated control registers.
Register 22-12: RXB0CON: Receive Buffer 0 Control Register
R/C-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R-0 R/W-0
RXFUL RXM1 RXM0 — RXRTRRO RX0DBEN JTOFF FILHIT0
bit 7 bit 0
bit 7 RXFUL: Receive Full status bit
1 = Receive buffer contains a valid received message
0 = Receive buffer is open to receive a new message
Note: This bit is set by the CAN module and should be cleared by software after the buffer
is read.
bit 6-5 RXM1:RXM0: Receive Buffer Mode bits
11 = Receive all messages (including those with errors)
10 = Receive only valid messages with extended identifier
01 = Receive only valid messages with standard identifier
00 = Receive all valid messages
bit 4 Unimplemented: Read as ’0’
bit 3 RXRTRRO: Receive Remote Transfer Request Read Only bit
1 = Remote Transfer Request
0 = No Remote Transfer Request
bit 2 RX0DBEN: Receive Buffer 0 Double Buffer Enable bit
1 = Receive Buffer 0 overflow will write to Receive Buffer 1
0 = No Receive Buffer 0 overflow to Receive Buffer 1
bit 1 JTOFF: Jump Table offset bit
1 = Allows Jump Table offset between 6 and 7
0 = Allows Jump Table offset between 1 and 0
bit 0 FILHIT0: Filter Hit bit
This bit indicates which acceptance filter enabled the message reception into receive buffer 0.
1 = Acceptance Filter 1 (RXF1)
0 = Acceptance Filter 0 (RXF0)
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
C = Clearable bit
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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2000 Microchip Technology Inc. DS39522A-page 22-11
Section 22. CAN
CAN
22
Register 22-13: RXB1CON: Receive Buffer 1 Control Register
R/C-0 R/W-0 R/W-0 U-0 R-0 R-0 R-0 R-0
RXFUL RXM1 RXM0 — RXRTRRO FILHIT2 FILHIT1 FILHIT0
bit 7 bit 0
bit 7 RXFUL: Receive Full status bit
1 = Receive buffer contains a valid received message
0 = Receive buffer is open to receive a new message
Note: This bit is set by the CAN module and should be cleared by software after the buffer
is read.
bit 6-5 RXM1:RXM0: Receive Buffer Mode bits
11 = Receive all messages (including those with errors)
10 = Receive only valid messages with extended identifier
01 = Receive only valid messages with standard identifier
00 = Receive all valid messages
bit 4 Unimplemented: Read as ’0’
bit 3 RXRTRRO: Receive Remote Transfer Request bit (read only)
1 = Remote Transfer Request
0 = No Remote Transfer Request
bit 2-0 FILHIT2:FILHIT0: Filter Hit bits
These bits indicate which acceptance filter enabled the last message reception into Receive
Buffer 1
111 = Reserved
110 = Reserved
101 = Acceptance Filter 5 (RXF5)
100 = Acceptance Filter 4 (RXF4)
011 = Acceptance Filter 3 (RXF3)
010 = Acceptance Filter 2 (RXF2)
001 = Acceptance Filter 1 (RXF1) only possible when RX0DBEN bit is set
000 = Acceptance Filter 0 (RXF0) only possible when RX0DBEN bit is set
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
C = Clearable bit
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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DS39522A-page 22-12 2000 Microchip Technology Inc.
Register 22-14: RXB0SIDH: Receive Buffer 0 Standard Identifier High Byte Register
RXB1SIDH: Receive Buffer 1 Standard Identifier High Byte Register
Register 22-15: RXB0SIDL: Receive Buffer 0 Standard Identifier Low Byte Register
RXB1SIDL: Receive Buffer 1 Standard Identifier Low Byte Register
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID3
bit 7 bit 0
bit 7-0 SID10:SID3: Standard Identifier bits
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R/W-x R/W-x R/W-x R/W-x R/W-x U-0 R/W-x R/W-x
SID2 SID1 SID0 SRR EXID — EID17 EID16
bit 7 bit 0
bit 7-5 SID2:SID0: Standard Identifier bits SID2 to SID1
bit 4 SRR: Substitute Remove Request bit (only when EXID = ’1’)
1 = Remote Transfer Request Occurred
0 = No Remote Transfer Request Occurred
bit 3 EXID: Extended Identifier bit
1 = Received message is an Extended Data Frame
0 = Received message is a Standard Data Frame
bit 2 Unimplemented: Read as ’0’
bit 1-0 EID17:EID16: Extended Identifier bits EID17 to EID16
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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2000 Microchip Technology Inc. DS39522A-page 22-13
Section 22. CAN
CAN
22
Register 22-16: RXB0EIDH: Receive Buffer 0 Extended Identifier High Byte Register
RXB1EIDH: Receive Buffer 1 Extended Identifier High Byte Register
Register 22-17: RXB0EIDL: Transmit Buffer 0 Extended Identifier Low Byte Register
RXB1EIDL: Transmit Buffer 1 Extended Identifier Low Byte Register
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8
bit 7 bit 0
bit 7-0 EID15:EID8: Extended Identifier bits EID15 to EID8
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0
bit 7 bit 0
bit 7-0 EID7:EID0: Extended Identifier bits EID7 to EID0
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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PIC18C Reference Manual
DS39522A-page 22-14 2000 Microchip Technology Inc.
Register 22-18: RXB0DLC: Receive Buffer 0 Data Length Code Register
RXB1DLC: Receive Buffer 1 Data Length Code Register
U-x R/W-x R-x R-x R-x R-x R-x R-x
— RXRTR RB1 RB0 DLC3 DLC2 DLC1 DLC0
bit 7 bit 0
bit 7 Unimplemented: Read as ’0’
bit 6 RXRTR: Receiver Remote Transmission Request bit
1 = Remote Transfer Request
0 = No Remote Transfer Request
bit 5 RB1: Reserved bit 1
Reserved by CAN Specification and read as ’0’
bit 4 RB0: Reserved bit 0
Reserved by CAN Specification and read as ’0’
bit 3-0 DLC3:DLC0: Data Length Code bits
1111 = Invalid
1110 = Invalid
1101 = Invalid
1100 = Invalid
1011 = Invalid
1010 = Invalid
1001 = Invalid
1000 = Data Length = 8 bytes
0111 = Data Length = 7 bytes
0110 = Data Length = 6 bytes
0101 = Data Length = 5 bytes
0100 = Data Length = 4 bytes
0011 = Data Length = 3 bytes
0010 = Data Length = 2 bytes
0001 = Data Length = 1 bytes
0000 = Data Length = 0 bytes
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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2000 Microchip Technology Inc. DS39522A-page 22-15
Section 22. CAN
CAN
22
Register 22-19: RXB0Dm: Receive Buffer 0 Data Field Byte m Register
RXB1Dm: Receive Buffer 1 Data Field Byte m Register
Register 22-20: RXERRCNT: Receive Error Count Register
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
RXBnDm7 RXBnDm6 RXBnDm5 RXBnDm4 RXBnDm3 RXBnDm2 RXBnDm1 RXBnDm0
bit 7 bit 0
bit 7-0 RXBnDm7:RXBnDm0: Receive Buffer n Data Field Byte m bits (where 0 < n < 1 and 0 < m < 7)
Each Receive Buffer has an array of registers. For example Receive buffer 0 has 7 registers:
RXB0D1 to RXB0D7.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
REC7 REC6 REC5 REC4 REC3 REC2 REC1 REC0
bit 7 bit 0
bit 7-0 REC7:REC0: Receive Error Counter bits
This register contains the number of errors that occurred for the Reception of this buffers message.
When the error count overflows, the bus off state occurs. When the bus has 256 occurrences of
11 consecutive recessive bits, the counter value is cleared.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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DS39522A-page 22-16 2000 Microchip Technology Inc.
22.2.4 Message Acceptance Filters
This subsection describes the Message Acceptance filters.
Register 22-21: RXF0SIDH: Receive Acceptance Filter 0 Std. Identifier Filter High Byte
RXF1SIDH: Receive Acceptance Filter 1 Std. Identifier Filter High Byte
RXF2SIDH: Receive Acceptance Filter 2 Std. Identifier Filter High Byte
RXF3SIDH: Receive Acceptance Filter 3 Std. Identifier Filter High Byte
RXF4SIDH: Receive Acceptance Filter 4 Std. Identifier Filter High Byte
RXF5SIDH: Receive Acceptance Filter 5 Std. Identifier Filter High Byte
Register 22-22: RXF0SIDL: Receive Acceptance Filter 0 Std. Identifier Filter Low Byte
RXF1SIDL: Receive Acceptance Filter 1 Std. Identifier Filter Low Byte
RXF2SIDL: Receive Acceptance Filter 2 Std. Identifier Filter Low Byte
RXF3SIDL: Receive Acceptance Filter 3 Std. Identifier Filter Low Byte
RXF4SIDL: Receive Acceptance Filter 4 Std. Identifier Filter Low Byte
RXF5SIDL:Receive Acceptance Filter 5 Std. Identifier Filter Low Byte
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID3
bit 7 bit 0
bit 7-0 SID10:SID3: Standard Identifier Filter bits SID10 to SID3
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R/W-x R/W-x R/W-x U-0 R/W-x U-0 R/W-x R/W-x
SID2 SID1 SID0 — EXIDEN — EID17 EID16
bit 7 bit 0
bit 7-5 SID2:SID0: Standard Identifier Filter bits SID2 to SID0
bit 4 Unimplemented: Read as ’0’
bit 3 EXIDEN: Extended Identifier Filter Enable bit
1 = Message will transmit Extended ID
0 = Message will not transmit Extended ID.
bit 2 Unimplemented: Read as ’0’
bit 1-0 EID17:EID16: Extended Identifier Filter bits EID17 to EID16
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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2000 Microchip Technology Inc. DS39522A-page 22-17
Section 22. CAN
CAN
22
Register 22-23: RXF0EIDH: Receive Acceptance Filter 0 Extended Identifier High Byte
RXF1EIDH: Receive Acceptance Filter 1 Extended Identifier High Byte
RXF2EIDH: Receive Acceptance Filter 2 Extended Identifier High Byte
RXF3EIDH: Receive Acceptance Filter 3 Extended Identifier High Byte
RXF4EIDH: Receive Acceptance Filter 4 Extended Identifier High Byte
RXF5EIDH:Receive Acceptance Filter 5 Extended Identifier High Byte
Register 22-24: RXB0EIDL: Receive Buffer 0 Extended Identifier Low Byte Register
RXB1EIDL: Receive Buffer 1 Extended Identifier Low Byte Register
RXB2EIDL: Receive Buffer 2 Extended Identifier Low Byte Register
RXB3EIDL: Receive Buffer 3 Extended Identifier Low Byte Register
RXB4EIDL: Receive Buffer 4 Extended Identifier Low Byte Register
RXB5EIDL: Receive Buffer 5 Extended Identifier Low Byte Register
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8
bit 7 bit 0
bit 7-0 EID15:EID8: Extended Identifier Filter bits EID15 to EID8
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0
bit 7 bit 0
bit 7-0 EID7:EID0: Extended Identifier Filterbits EID7 to EID0
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
39500 18C Reference Manual.book Page 17 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39522A-page 22-18 2000 Microchip Technology Inc.
Register 22-25: RXM0SIDH: Receive Acceptance Mask 0 Std. Identifier Mask High Byte
Register
RXM1SIDH: Receive Acceptance Mask 1 Std. Identifier Mask High Byte
Register
Register 22-26: RXM0SIDL: Receive Acceptance Mask 0 Std. Identifier Mask Low Byte
Register
RXM1SIDL: Receive Acceptance Mask 1 Std. Identifier Mask Low Byte
Register
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID3
bit 7 bit 0
bit 7-0 SID10:SID3: Standard Identifier Mask bits SID10 to SID3
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R/W-x R/W-x R/W-x U-0 U-0 U-0 R/W-x R/W-x
SID2 SID1 SID0 — — — EID17 EID16
bit 7 bit 0
bit 7-5 SID2:SID0: Standard Identifier Mask bits SID2 to SID0
bit 4-2 Unimplemented: Read as ’0’
bit 1-0 EID17:EID16: Extended Identifier Mask bits EID17 to EID16
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 22. CAN
CAN
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Register 22-27: RXM0EIDH: Receive Acceptance Mask 0 Extended Identifier Mask High
Byte Register
RXM1EIDH: Receive Acceptance Mask 1 Extended Identifier Mask High
Byte Register
Register 22-28: RXM0EIDL: Receive Acceptance Mask 0 Extended Identifier Mask Low
Byte Register
RXM1EIDL: Receive Acceptance Mask 1 Extended Identifier Mask Low
Byte Register
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8
bit 7 bit 0
bit 1-0 EID15:EID8: Extended Identifier Mask bits EID15 to EID8
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID7 EID6 EID5 EID4 EID3 EID2 EID1 EID0
bit 7 bit 0
bit 1-0 EID7:EID0: Extended Identifier Mask bits EID7 to EID0
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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22.2.5 CAN Baud Rate Registers
This subsection describes the CAN baud rate registers.
Register 22-29: BRGCON1: Baud Rate Control Register 1
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SJW1 SJW0 BRP5 BRP4 BRP3 BRP2 BRP1 BRP0
bit 7 bit 0
bit 7-6 SJW1:SJW0: Synchronized Jump Width bits
11 = Synchronization Jump Width Time = 4 x TQ
10 = Synchronization Jump Width Time = 3 x TQ
01 = Synchronization Jump Width Time = 2 x TQ
00 = Synchronization Jump Width Time = 1 x TQ
bit 5-0 BRP5:BRP0: Baud Rate Prescaler bits
11111 = TQ = (2 x 64)/FOSC
11110 = TQ = (2 x 63)/FOSC
:
:
00001 = TQ = (2 x 2)/FOSC
00000 = TQ = (2 x 1)/FOSC
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Note: This register is only accessible in configuration mode (see Section 22.7.1).
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Section 22. CAN
CAN
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Register 22-30: BRGCON2: Baud Rate Control Register 2
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
SEG2PHTS SAM SEG1PH2 SEG1PH1 SEG1PH0 PRSEG2 PRSEG1 PRSEG0
bit 7 bit 0
bit 7 SEG2PHTS: Phase Segment 2 Time Select bit
1 = Freely programmable
0 = Maximum of PHEG1 or Information Processing Time (IPT), whichever is greater
bit 6 SAM: Sample of the CAN bus line bit
1 = Bus line is sampled three times at the sample point
0 = Bus line is sampled once at the sample point
bit 5-3 SEG1PH2:SEG1PH0: Phase segment 1 bits
111 = Phase segment 1 Time = 8 x TQ
110 = Phase segment 1 Time= 7 x TQ
101 = Phase segment 1 Time = 6 x TQ
100 = Phase segment 1 Time = 5 x TQ
011 = Phase segment 1 Time = 4 x TQ
010 = Phase segment 1 Time = 3 x TQ
001 = Phase segment 1 Time = 2 x TQ
000 = Phase segment 1 Time = 1 x TQ
bit 2-0 PRSEG2:PRSEG0: Propagation Time Select bits
111 = Propagation Time = 8 x TQ
110 = Propagation Time = 7 x TQ
101 = Propagation Time = 6 x TQ
100 = Propagation Time = 5 x TQ
011 = Propagation Time = 4 x TQ
010 = Propagation Time = 3 x TQ
001 = Propagation Time = 2 x TQ
000 = Propagation Time = 1 x TQ
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Note: This register is only accessible in configuration mode (see Section 22.7.1).
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Register 22-31: BRGCON3: Baud Rate Control Register 3
U-0 R/W-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0
— WAKFIL — — — SEG2PH2 SEG2PH1 SEG2PH0
bit 7 bit 0
bit 7 Unimplemented: Read as ’0’
bit 6 WAKFIL: Selects CAN Bus Line Filter for Wake-up bit
1 = Use CAN bus line filter for wake-up
0 = CAN bus line filter is not used for wake-up
bit 5-3 Unimplemented: Read as ’0’
bit 2-0 SEG2PH2:SEG2PH0: Phase Segment 2 Time Select bits
111 = Phase Segment 2 Time = 8 x TQ
110 = Phase Segment 2 Time = 7 x TQ
101 = Phase Segment 2 Time = 6 x TQ
100 = Phase Segment 2 Time = 5 x TQ
011 = Phase Segment 2 Time = 4 x TQ
010 = Phase Segment 2 Time = 3 x TQ
001 = Phase Segment 2 Time = 2 x TQ
000 = Phase Segment 2 Time = 1 x TQ
Note: Ignored if SEG2PHTS bit is clear.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 22. CAN
CAN
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22.2.6 CAN Module I/O Control Register
This subsection describes the CAN Module I/O Control register.
Register 22-32: CIOCON: CAN I/O Control Register
R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0
TX1SRC TX1EN ENDRHI CANCAP — — — —
bit 7 bit 0
bit 7 TX1SRC: TX1 Pin Data Source
1 = TX1 pin will output the CAN clock
0 = TX1 pin will output TXD
bit 6 TX1EN: TX1 Pin Enable
1 = TX1 pin will output TXD or CAN clock
0 = TX1 pin will have digital I/O function
bit 5 ENDRHI: Enable Drive High
1 = TX0, TX1 pins will drive Vdd when recessive
0 = TX0, TX1 pins will tri-state when recessive
bit 4 CANCAP: CAN Message Receive Capture Enable
1 = Enable CAN capture
0 = Disable CAN capture
bit 3-0 Unimplemented: Read as ’0’
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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22.2.7 CAN Interrupt Registers
This subsection documents the CAN Registers which are associated to Interrupts.
Register 22-33: PIR3: Peripheral Interrupt Flag Register
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
IRXIF WAKIF ERRIF TXB2IF TXB1IF TXB0IF RXB1IF RXB0IF
bit 7 bit 0
bit 7 IRXIF: CAN Invalid Received message Interrupt Flag bit
1 = An invalid message has occurred on the CAN bus
0 = No invalid message on CAN bus
bit 6 WAKIF: CAN Bus Activity Wake-up Interrupt Flag bit
1 = Activity on CAN bus has occurred
0 = No activity on CAN bus
bit 5 ERRIF: CAN bus Error Interrupt Flag bit
1 = An error has occurred in the CAN module (multiple sources)
0 = No CAN module errors
bit 4 TXB2IF: CAN Transmit Buffer 2 Interrupt Flag bit
1 = Transmit Buffer 2 has completed transmission of a message, and may be re-loaded
0 = Transmit Buffer 2 has not completed transmission of a message
bit 3 TXB1IF: CAN Transmit Buffer 1 Interrupt Flag bit
1 = Transmit Buffer 1 has completed transmission of a message, and may be re-loaded
0 = Transmit Buffer 1 has not completed transmission of a message
bit 2 TXB0IF: CAN Transmit Buffer 0 Interrupt Flag bit
1 = Transmit Buffer 0 has completed transmission of a message, and may be re-loaded
0 = Transmit Buffer 0 has not completed transmission of a message
bit 1 RXB1IF: CAN Receive Buffer 1 Interrupt Flag bit
1 = Receive Buffer 1 has received a new message
0 = Receive Buffer 1 has not received a new message
bit 0 RXB0IF: CAN Receive Buffer 0 Interrupt Flag bit
1 = Receive Buffer 0 has received a new message
0 = Receive Buffer 0 has not received a new message
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 22. CAN
CAN
22
Register 22-34: PIE3: Peripheral Interrupt Enable Register
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
IRXIE WAKIE ERRIE TXB2IE TXB1IE TXB0IE RXB1IE RXB0IE
bit 7 bit 0
bit 7 IRXIE: CAN Invalid Received Message Interrupt Enable bit
1 = Enable invalid message received interrupt
0 = Disable invalid message received interrupt
bit 6 WAKIE: CAN Bus Activity Wake-up Interrupt Enable bit
1 = Enable Bus Activity Wake-up Interrupt
0 = Disable Bus Activity Wake-up Interrupt
bit 5 ERRIE: CAN Bus Error Interrupt Enable bit
1 = Enable CAN bus Error Interrupt
0 = Disable CAN bus Error Interrupt
bit 4 TXB2IE: CAN Transmit Buffer 2 Interrupt Enable bit
1 = Enable Transmit Buffer 2 Interrupt
0 = Disable Transmit Buffer 2 Interrupt
bit 3 TXB1IE: CAN Transmit Buffer 1 Interrupt Enable bit
1 = Enable Transmit Buffer 1 Interrupt
0 = Disable Transmit Buffer 1 Interrupt
bit 2 TXB0IE: CAN Transmit Buffer 0 Interrupt Enable bit
1 = Enable Transmit Buffer 0 Interrupt
0 = Disable Transmit Buffer 0 Interrupt
bit 1 RXB1IE: CAN Receive Buffer 1 Interrupt Enable bit
1 = Enable Receive Buffer 1 Interrupt
0 = Disable Receive Buffer 1 Interrupt
bit 0 RXB0IE: CAN Receive Buffer 0 Interrupt Enable bit
1 = Enable Receive Buffer 0 Interrupt
0 = Disable Receive Buffer 0 Interrupt
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Register 22-35: IPR3: Peripheral Interrupt Priority Register
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
IRXIP WAKIP ERRIP TXB2IP TXB1IP TXB0IP RXB1IP RXB0IP
bit 7 bit 0
bit 7 IRXIP: CAN Invalid Received Message Interrupt Priority bit
1 = High Priority
0 = Low Priority
bit 6 WAKIP: CAN Bus Activity Wake-up Interrupt Priority bit
1 = High Priority
0 = Low Priority
bit 5 ERRIP: CAN Bus Error Interrupt Priority bit
1 = High Priority
0 = Low Priority
bit 4 TXB2IP: CAN Transmit Buffer 2 Interrupt Priority bit
1 = High Priority
0 = Low Priority
bit 3 TXB1IP: CAN Transmit Buffer 1 Interrupt Priority bit
1 = High Priority
0 = Low Priority
bit 2 TXB0IP: CAN Transmit Buffer 0 Interrupt Priority bit
1 = High Priority
0 = Low Priority
bit 1 RXB1IP: CAN Receive Buffer 1 Interrupt Priority bit
1 = High Priority
0 = Low Priority
bit 0 RXB0IP: CAN Receive Buffer 0 Interrupt Priority bit
1 = High Priority
0 = Low Priority
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 22. CAN
CAN
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Table 22-1: CAN Controller Register Map
Address Register
Name
Address Register
Name
Address Register
Name
Address Register
Name
F7Fh — F5Fh — F3Fh — F1Fh RXM1EIDL
F7Eh — F5Eh CANSTATRO1 F3Eh CANSTATRO3 F1Eh RXM1EIDH
F7Dh — F5Dh RXB1D7 F3Dh TXB1D7 F1Dh RXM1SIDL
F7Ch — F5Ch RXB1D6 F3Ch TXB1D6 F1Ch RXM1SIDH
F7Bh — F5Bh RXB1D5 F3Bh TXB1D5 F1Bh RXM0EIDL
F7Ah — F5Ah RXB1D4 F3Ah TXB1D4 F1Ah RXM0EIDH
F79h — F59h RXB1D3 F39h TXB1D3 F19h RXM0SIDL
F78h — F58h RXB1D2 F38h TXB1D2 F18h RXM0SIDH
F77h — F57h RXB1D1 F37h TXB1D1 F17h RXF5EIDL
F76h TXERRCNT F56h RXB1D0 F36h TXB1D0 F16h RXF5EIDH
F75h RXERRCNT F55h RXB1DLC F35h TXB1DLC F15h RXF5SIDL
F74h COMSTAT F54h RXB1EIDH F34h TXB1EIDH F14h RXF5SIDH
F73h CIOCON F53h RXB1EIDL F33h TXB1EIDL F13h RXF4EIDL
F72h BRGCON3 F52h RXB1SIDL F32h TXB1SIDL F12h RXF4EIDH
F71h BRGCON2 F51h RXB1SIDH F31h TXB1SIDH F11h RXF4SIDL
F70h BRGCON1 F50h RXB1CON F30h TXB1CON F10h RXF4SIDH
F6Fh CANCON F4Fh — F2Fh — F0Fh RXF3EIDL
F6Eh CANSTAT F4Eh CANSTATRO2 F2Eh CANSTATRO4 F0Eh RXF3EIDH
F6Dh RXB0D7 F4Dh TXB0D7 F2Dh TXB2D7 F0Dh RXF3SIDL
F6Ch RXB0D6 F4Ch TXB0D6 F2Ch TXB2D6 F0Ch RXF3SIDH
F6Bh RXB0D5 F4Bh TXB0D5 F2Bh TXB2D5 F0Bh RXF2EIDL
F6Ah RXB0D4 F4Ah TXB0D4 F2Ah TXB2D4 F0Ah RXF2EIDH
F69h RXB0D3 F49h TXB0D3 F29h TXB2D3 F09h RXF2SIDL
F68h RXB0D2 F48h TXB0D2 F28h TXB2D2 F08h RXF2SIDH
F67h RXB0D1 F47h TXB0D1 F27h TXB2D1 F07h RXF1EIDL
F66h RXB0D0 F46h TXB0D0 F26h TXB2D0 F06h RXF1EIDH
F65h RXB0DLC F45h TXB0DLC F25h TXB2DLC F05h RXF1SIDL
F64h RXB0EIDL F44h TXB0EIDL F24h TXB2EIDL F04h RXF1SIDH
F63h RXB0EIDH F43h TXB0EIDH F23h TXB2EIDH F03h RXF0EIDH
F62h RXB0SIDL F42h TXB0SIDL F22h TXB2SIDL F02h RXF0EIDL
F61h RXB0SIDH F41h TXB0SIDH F21h TXB2SIDH F01h RXF0SIDL
F60h RXB0CON F40h TXB0CON F20h TXB2CON F00h RXF0SIDH
Note: The shaded addresses indicate the registers that are in the access RAM.
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22.3 CAN Overview
The Controller Area Network (CAN) is a serial communications protocol which efficiently supports
distributed real-time control with a very high level of robustness. The Protocol is fully
defined by Robert Bosch GmbH, in the CAN Specification V2.0B from 1991.
Its domain of application ranges from high speed networks to low cost multiplex wiring. In automotive
electronics; (engine control units, sensors, anti-skid-systems, etc.) are connected using
CAN with bit rates up to 1 Mbit/sec. The CAN Network allows a cost effective replacement of the
wiring harnesses in the automobile. The robustness of the bus in noisy environments and the
ability to detect and recover from fault conditions makes the bus suitable for industrial control
applications such as DeviceNet, SDS and other fieldbus protocols.
CAN is an asynchronous serial bus system with one logical bus line. It has an open, linear bus
structure with equal bus nodes. A CAN bus consists of two or more nodes. The number of nodes
on the bus may be changed dynamically without disturbing the communication of other nodes.
This allows easy connection and disconnection of bus nodes (e.g. for addition of system function,
error recovery or bus monitoring).
The bus logic corresponds to a "wired-AND" mechanism, "Recessive" bits (mostly, but not necessarily
equivalent to the logic level “1”) are overwritten by "Dominant" bits (mostly logic level
"0"). As long as no bus node is sending a dominant bit, the bus line is in the recessive state, but
a dominant bit from any bus node generates the dominant bus state. Therefore, for the CAN bus
line, a medium must be chosen that is able to transmit the two possible bit states (dominant and
recessive). One of the most common and cheapest ways is to use a twisted wire pair. The bus
lines are then called "CANH" and "CANL", and may be connected directly to the nodes or via a
connector. There's no standard defined by CAN regarding the connector to be used. The twisted
wire pair is terminated by terminating resistors at each end of the bus line. The maximum bus
speed is 1 Mbit, which can be achieved with a bus length of up to 40 meters. For bus lengths
longer than 40 meters the bus speed must be reduced (a 1000 m bus can be realized with a
40 Kbit bus speed). For a bus length above 1000 meters special drivers should be used. At least
20 nodes may be connected without additional equipment. Due to the differential nature of transmission,
CAN is insensitive to EMI because both bus lines are affected in the same way which
leaves the differential signal unaffected. The bus lines can also be shielded to reduce the electromagnetic
emission of the bus itself, especially at high baud rates.
The binary data is coded corresponding to the NRZ code (Non-Return-to-Zero; low
level = dominant state; high level = recessive state). To ensure clock synchronization of all bus
nodes, bit-stuffing is used. This means that during the transmission of a message a maximum of
five consecutive bits may have the same polarity. Whenever five consecutive bits of the same
polarity have been transmitted, the transmitter will insert one additional bit of the opposite polarity
into the bit stream before transmitting further bits. The receiver also checks the number of bits
with the same polarity and removes the stuff bits from the bit stream (destuffing).
In the CAN protocol it is not bus nodes that are addressed, but the address information is contained
in the messages that are transmitted. This is done via an identifier (part of each message)
which identifies the message content (e.g. engine speed, oil temperature etc.,). The identifier
additionally indicates the priority of the message. The lower the binary value of the identifier, the
higher the priority of the message.
For bus arbitration, Carrier Sense Multiple Access/Collision Detection (CSMA/CD) with
Non-Destructive Arbitration (NDA) is used. If bus node A wants to transmit a message across the
network, it first checks that the bus is in the idle state ("Carrier Sense") i.e., no node is currently
transmitting. If this is the case (and no other node wishes to start a transmission at the same
moment) node A becomes the bus master and sends its message. All other nodes switch to
receive mode during the first transmitted bit (Start Of Frame bit). After correct reception of the
message (which is acknowledged by each node) each bus node checks the message identifier
and stores the message, if required. Otherwise, the message is discarded.
If two or more bus nodes start their transmission at the same time ("Multiple Access"), collision
of the messages is avoided by bitwise arbitration ("Collision Detection/Non-Destructive Arbitration"
together with the "Wired-AND" mechanism, "dominant" bits override "recessive" bits). Each
node sends the bits of its message identifier (MSb first) and monitors the bus level. A node that
sends a recessive identifier bit but reads back a dominant one loses bus arbitration and switches
to receive mode. This condition occurs when the message identifier of a competing node has a
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Section 22. CAN
CAN
22
lower binary value (dominant state = logic 0) and therefore, the competing node is sending a
message with a higher priority. In this way, the bus node with the highest priority message wins
arbitration without losing time by having to repeat the message. All other nodes automatically try
to repeat their transmission once the bus returns to the idle state. It is not permitted for different
nodes to send messages with the same identifier as arbitration could fail leading to collisions and
errors later in the message.
The original CAN specifications (Versions 1.0, 1.2 and 2.0A) defined the message identifier as
having a length of 11 bits giving a possible 2048 message identifiers. The specification has since
been updated (to version 2.0B) to remove this limitation. CAN specification Version 2.0B allows
message identifier lengths of 11 and/or 29 bits to be used (an identifier length of 29 bits allows
over 536 Million message identifiers). Version 2.0B CAN is also referred to as "Extended CAN";
and Versions 1.0, 1.2 and 2.0A) are referred to as "Standard CAN".
22.3.1 Standard CAN vs. Extended CAN
Those Data Frames and Remote Frames, which only contain the 11 bit identifier, are called Standard
Frames according to CAN specification V2.0A. With these frames, 2048 different messages
can be identified (identifiers 0-2047). However, the 16 messages with the lowest priority
(2032-2047) are reserved. Extended Frames according to CAN specification V2.0B have a 29 bit
identifier. As already mentioned, this 29 bit identifier is made up of the 11 bit identifier ("Standard
lD") and the 18 bit Extended identifier ("Extended ID").
CAN modules specified by CAN V2.0A are only able to transmit and receive Standard Frames
according to the Standard CAN protocol. Messages using the 29 bit identifier cause errors. If a
device is specified by CAN V2.0B, there is one more distinction. Modules named "Part B Passive"
can only transmit and receive Standard Frames but tolerate Extended Frames without generating
Error Frames. "Part B Active" devices are able to transmit and receive both Standard and
Extended Frames.
22.3.2 Basic CAN vs. Full CAN
There is one more CAN characteristic concerning the interface between the CAN module and
the host CPU, dividing CAN chips into "Basic CAN" and "Full CAN" devices. This distinction is
not related to Standard vs. Extended CAN, which makes it possible to use both Basic and Full
CAN devices in the same network.
In the Basic CAN devices, only basic functions of the protocol are implemented in hardware, e.g.
the generation and the check of the bit stream. The decision, if a received message has to be
stored or not (acceptance filtering) and the whole message management has to be done by software,
i.e., by the host CPU. In addition, the CAN chip typically provides only one transmit buffer
and one or two receive buffers. So the host CPU load is quite high using Basic CAN modules,
and these devices can only be used at low baud rates and low bus loads with only a few different
messages. The advantages of Basic CAN are the small chip size leading to low costs of these
devices.
Full CAN devices implement the whole bus protocol in hardware including the acceptance filtering
and the message management. They contain several so called message objects which handle
the identifier, the data, the direction (receive or transmit) and the information Standard
CAN/Extended CAN. During the initialization of the device, the host CPU defines which messages
are to be sent and which are to be received. The host CPU is informed by interrupt if the
identifier of a received message matches with one of the programmed (receive-) message
objects. In this way. the CPU load is reduced. Using Full CAN devices, high baud rates and high
bus loads with many messages can be handled. These chips are more expensive than the Basic
CAN devices, though.
Many Full CAN chips provide a "Basic-CAN Feature". One of the messages objects can be programmed
in so that every message is stored there that does not match with one of the other message
objects. This can be very helpful in a number of applications.
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22.3.3 ISO Model
The lSO/OSl Reference Model is used to define the layers of protocol of a communication system
as shown in Figure 22-2. At the highest end, the applications need to communicate between
each other. At the lowest end, some physical medium is used to provide electrical signaling.
The higher levels of the protocol are run by software. Within the CAN bus specification, there is
no definition of the type of message or the contents or meaning of the messages transferred.
These definitions are made in systems such as Volcano, the Volvo automotive CAN specification;
J1939, the U.S. heavy truck multiplex wiring specification; and Allen-Bradly DeviceNet and
Honeywell SDS, examples of industrial protocols.
The CAN bus module definition encompasses two levels of the overall protocol.
• The Data Link Layer
- The Logical Link Control (LLC) sub layer
- The Medium Access Control (MAC) sub layer
• The Physical Layer
- The Physical Signaling (PLS) sub layer
The LLC sub layer is concerned with Message Filtering, Overload Notification and Error Recovery
Management. The scope of the LLC sub layer is:
• To provide services for data transfer and for remote data request,
• To decide which messages received by the LLC sub layer are actually to be accepted,
• To provide means for error recovery management and overload notifications.
The MAC sub layer represents the kernel of the CAN protocol. The MAC sub layer defines the
transfer protocol, i.e., controlling the Framing, Performing Arbitration, Error Checking, Error Signalling
and Fault Confinement. It presents messages received from the LLC sub layer and
accepts messages to be transmitted to the LLC sub layer. Within the MAC sub layer it is decided
whether the bus is free for starting a new transmission or whether a reception is just starting. The
MAC sub layer is supervised by a management entity called Fault Confinement which is
self-checking mechanism for distinguishing short disturbances from permanent failures. Also,
some general features of the bit timing are regarded as part of the MAC sub layer.
The physical layer defines the actual transfer of the bits between the different nodes with respect
to all electrical properties. The PLS sub layer defines how signals are actually transmitted and
therefore deals with the description of Bit Timing, Bit Encoding, and Synchronization.
The lower levels of the protocol are implemented in driver/receiver chips and the actual interface
such as twisted pair wiring or optical fiber etc. Within one network, the physical layer has to be
the same for all nodes. The Driver/Receiver Characteristics of the Physical Layer are not defined
so as to allow transmission medium and signal level implementations to be optimized for their
application. The most common example is defined in ISO11898 Road Vehicles multiplex wiring
specification.
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Section 22. CAN
CAN
22
Figure 22-2: CAN Bus in ISO/OSI Reference Model
OSI REFERENCE LAYERS
Presentation
Transport
Data Link Layer
LLC (Logical Link Control)
Acceptance Filtering
Overload Notification
Recovery Management
MAC (Medium Access Control)
Data Encapsulation/Decapsulation
Frame Coding (stuffing, destuffing)
Medium Access Management
Error Detection
Error Signalling
Acknowledgment
Serialization/Deserialization
Physical Layer
PLS (Physical Signalling)
Bit Encoding/Decoding
Bit Timing
Synchronization
PMA (Physical Medium Attachment)
Driver/Receiver Characteristics
MDI (Medium Dependent Interface)
Connectors
Fault
confinement
(MAC-LME)
Bus Failure
management
(PLS-LME)
Supervisor
Shaded Regions
Implemented by
the CAN Module
Has to be Implemented
in PICmicro Firmware
Session
Network
Application
CAN
Transceiver
Chip
Connector
39500 18C Reference Manual.book Page 31 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39522A-page 22-32 2000 Microchip Technology Inc.
22.4 CAN Bus Features
The CAN module is a communication controller implementing the CAN 2.0A/B protocol as
defined in the BOSCH specification. The module will support CAN 1.2, CAN 2.0A, CAN 2.0B
Passive, and CAN 2.0B Active versions of the protocol. The module implementation is a Full CAN
system.
The module features are as follows:
• Implementation of the CAN protocol CAN 1.2, CAN 2.0A and CAN 2.0B
• Standard and extended data frames
• Data length from 0 - 8 bytes
• Programmable bit rate up to 1 Mbit/sec
• Support for remote frames
• Double buffered receiver with two prioritized received message storage buffers
• 6 full (standard/extended identifier) acceptance filters, 2 associated with the high priority
receive buffer, and 4 associated with the low priority receive buffer
• 2 full acceptance filter masks, one each associated with the high and low priority receive
buffers
• Three transmit buffers with application specified prioritization and abort capability
• Programmable wake-up functionality with integrated low-pass filter
• Programmable loop-back mode and programmable state clocking supports self-test operation
• Signaling via interrupt capabilities for all CAN receiver and transmitter error states
• Programmable clock source
• Programmable link to timer module for time-stamping and network synchronization
• Low power SLEEP mode
39500 18C Reference Manual.book Page 32 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39522A-page 22-33
Section 22. CAN
CAN
22
22.5 CAN Module Implementation
This subsection will discuss the implementation of the CAN module and the supported frame formats.
22.5.1 Overview of the Module
The CAN bus module consists of a Protocol Engine and message buffering and control. The Protocol
Engine can best be understood by defining the types of data frames to be transmitted and
received by the module. These blocks are shown in Figure 22-3.
Figure 22-3: CAN Buffers and Protocol Engine Block Diagram
Acceptance Filter
RXF2
R
X
B
1
A
c
c
e
p
t
A
c
c
e
p
t
Identifier
Data Field Data Field
Identifier
Acceptance Mask
RXM1
Acceptance Filter
RXF3
Acceptance Filter
RXF4
Acceptance Filter
RXF5
M
A
B
Acceptance Mask
RXM0
Acceptance Filter
RXF0
Acceptance Filter
RXF1
R
X
B
0
MSGREQ
TXB2
TXABT
TXLARB
TXERR
MTXBUFF
MESSAGE
Message
Queue
Control Transmit Byte Sequencer MSGREQ
TXB1
TXABT
TXLARB
MSGREQ
TXERR
MTXBUFF
MESSAGE
TXB0
TXABT
TXLARB
TXERR
MTXBUFF
MESSAGE
Transmit Shift Receive Shift
Receive
Error
Transmit
Error
Protocol
RXERRCNT
TXERRCNT
Finite
State
Machine
Counter
Counter
Transmit
Logic
Bit
Timing
Logic
TX
CANRX
Bit Timing
Generator
PROTOCOL
ENGINE
BUFFERS
CRC Generator CRC Check
CANTX
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PIC18C Reference Manual
DS39522A-page 22-34 2000 Microchip Technology Inc.
22.5.1.1 Typical Connection
Figure 22-4 shows a typical connection between multiple CAN nodes with CAN bus terminators.
Figure 22-4: CAN Bus Connection with CAN Bus Terminators
22.5.2 CAN Protocol Engine
The CAN protocol engine combines several functional blocks, shown in Figure 22-5. These units
and the functions they provide are described below.
The heart of the engine is the Protocol Finite State Machine (FSM). This state machine
sequences through the messages on a bit by bit basis, changing states of the machine as various
fields of various frame types are transmitted or received. The framing messages in Section 22.6
show the states associated with each bit. The FSM is a sequencer controlling the sequential data
stream between the TX/RX Shift Register, the CRC Register, and the bus line. The FSM also
controls the Error Management Logic (EML) and the parallel data stream between the TX/RX
Shift Register and the buffers such that the processes of reception arbitration, transmission, and
error signaling are performed according to the CAN protocol. Note that the automatic retransmission
of messages on the bus line is handled by the FSM.
The data interface to the engine consists of byte wide transmit and receive data. Rather than
assembling and shifting an entire frame, the frames are broken into bytes. A receive or transmit
address from the Protocol FSM signifies which byte of the frame is current. For transmission, the
appropriate byte from the transmit buffer is selected and presented to the engine, which then
uses an 8 bit shift register to serialize the data. For reception, an 8 bit shift register assembles a
byte which is then loaded into the appropriate byte in the message assembly buffer.
The Cyclic Redundancy Check Register generates the Cyclic Redundancy Check (CRC) code
to be transmitted over the data bytes and checks the CRC code of incoming messages.
The Error Management Logic (EML) is responsible for the fault confinement of the CAN device.
Its counters, the Receive Error Counter and the Transmit Error Counter, are incremented and
decremented by commands from the Bit Stream Processor. According to the values of the error
counters, the CAN controller is set into the states error active, error passive or bus off.
The Bit Timing Logic (BTL) monitors the bus line input and handles the bus line related bit timing
according to the CAN protocol. The BTL synchronizes on a recessive to dominant busline transition
at Start of Frame (hard synchronization) and on any further recessive to dominant bus line
transition, if the CAN controller itself does not transmit a dominant bit (resynchronization). The
BTL also provides programmable time segments to compensate for the propagation delay time
and for phase shifts and in defining the position of the Sample Point in the bit time. The programming
of the BTL depends on the baud rate and on external physical delay times.
CAN
Node 1
CAN
Node 2
CAN
Node 3
CAN
Node 4
CAN
Node 5
CAN
Node n
Bus Terminator CAN BUS Bus Terminator
39500 18C Reference Manual.book Page 34 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39522A-page 22-35
Section 22. CAN
CAN
22
Figure 22-5: CAN Protocol Engine Block Diagram
Bit Timing Logic (BTL)
CRC <14:0>
Comparator
Receive Shift Transmit Shift
Sample <2:0>
Majority
Decision
StuffReg <5:0>
Comparator
Transmit Logic
Receive
Error Counter
Transmit
Error Counter
Protocol
FSM
CANRX
SAM
BusMon
Received Data Data to Transmit
CANTX
RXERRCNT
TXERRCNT
Interface to Standard Buffer
39500 18C Reference Manual.book Page 35 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39522A-page 22-36 2000 Microchip Technology Inc.
22.5.3 CAN Module Functionality
The CAN protocol engine handles all functions for receiving and transmitting messages on the
CAN bus. Messages are transmitted by first loading the appropriate data registers. Status and
errors can be checked by reading the appropriate registers. Any message detected on the CAN
bus is checked for errors and then matched against filters to see if it should be received and
stored in one of the 2 receive registers.
The CAN Module supports the following Frame types:
• Standard Data Frame
• Extended Data Frame
• Remote Frame
• Error Frame
• Overload Frame
• Interframe Space
Section 22.6 describes the Frames and their formats.
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2000 Microchip Technology Inc. DS39522A-page 22-37
Section 22. CAN
CAN
22
22.6 Frame Types
This chapter describes the CAN Frame types supported by the CAN module.
22.6.1 Standard Data Frame
A Standard Data Frame is generated by a node when the node wishes to transmit data. The
Standard CAN Data Frame is shown in Figure 22-6. In common with all other frames, the frame
begins with a Start Of Frame bit (SOF - dominant state) for hard synchronization of all nodes.
The SOF is followed by the Arbitration Field consisting of 12 bits, the 11 bit ldentifier (reflecting
the contents and priority of the message) and the RTR bit (Remote Transmission Request bit).
The RTR bit is used to distinguish a data Frame (RTR - dominant) from a Remote Frame.
The next field is the Control Field, consisting of 6 bits. The first bit of this field is called the Identifier
Extension (IDE) bit and is at dominant state to specify that the frame is a Standard Frame.
The following bit is reserved, RB0, and defined as a dominant bit. The remaining 4 bits of the
Control Field are the Data Length Code (DLC) and specify the number of bytes of data contained
in the message.
The data being sent follows in the Data Field which is of the length defined by the DLC above
(0 - 8 bytes).
The Cyclic Redundancy Field (CRC) follows and is used to detect possible transmission errors.
The CRC Field consists of a 15 bit CRC sequence, completed by the End of Frame (EOF) field,
which consists of seven recessive bits (no bit-stuffing).
The final field is the Acknowledge Field. During the ACK Slot bit the transmitting node sends out
a recessive bit. Any node that has received an error free frame acknowledges the correct reception
of the frame by sending back a dominant bit (regardless of whether the node is configured
to accept that specific message or not). The recessive Acknowledge Delimiter completes the
Acknowledge Slot and may not be overwritten by a dominant bit.
22.6.1.1 Extended Data Frame
In the Extended CAN Data Frame, shown in Figure 22-7, the Start of Frame bit (SOF) is followed
by the Arbitration Field consisting of 38 bits. The first 11 bits are the 11 most significant bits of
the 29 bit identifier ("Base-lD"). These 11 bits are followed by the Substitute Remote Request bit
(SRR), which is transmitted as recessive. The SRR is followed by the lDE bit which is recessive
to denote that the frame is an Extended CAN frame. It should be noted from this, that if arbitration
remains unresolved after transmission of the first 11 bits of the identifier, and one of the nodes
involved in arbitration is sending a Standard CAN frame (11 bit identifier), then the Standard CAN
frame will win arbitration due to the assertion of a dominant lDE bit. Also, the SRR bit in an
Extended CAN frame must be recessive to allow the assertion of a dominant RTR bit by a node
that is sending a Standard CAN Remote Frame. The SRR and lDE bits are followed by the
remaining 18 bits of the identifier ("lD-Extension") and the Remote Transmission Request bit.
To enable standard and extended frames to be sent across a shared network, it is necessary to
split the 29 bit extended message Identifier into 11 bit (most significant) and 18 bit (least significant)
sections. This split ensures that the Identifier Extension bit (lDE) can remain at the same
bit position in both standard and extended frames.
The next field is the Control Field, consisting of 6 bits. The first 2 bits of this field are reserved
and are at dominant state. The remaining 4 bits of the Control Field are the Data Length Code
(DLC) and specify the number of data bytes.
The remaining portion of the frame (Data Field, CRC Field, Acknowledge Field, End Of Frame
and lntermission) is constructed in the same way as for a Standard Data Frame.
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PIC18C Reference Manual
DS39522A-page 22-38 2000 Microchip Technology Inc.
22.6.1.2 Remote Frame
Normally data transmission is performed on an autonomous basis with the data source node
(e.g. a sensor sending out a Data Frame). It is possible, however, for a destination node to
request the data from the source. For this purpose, the destination node sends a "Remote
Frame" with an identifier that matches the identifier of the required Data Frame. The appropriate
data source node will then send a Data Frame as a response to this Remote request.
There are 2 differences between a Remote Frame and a Data Frame, shown in Figure 22-8. First,
the RTR bit is at the recessive state and second there is no Data Field. In the very unlikely event
of a Data Frame and a Remote Frame with the same identifier being transmitted at the same time,
the Data Frame wins arbitration due to the dominant RTR bit following the identifier. In this way,
the node that transmitted the Remote Frame receives the desired data immediately.
22.6.1.3 The Error Frame
An Error Frame is generated by any node that detects a bus error. An error frame, shown in
Figure 22-9, consists of 2 fields, an Error Flag field followed by an Error Delimiter field. The Error
Delimiter consists of 8 recessive bits and allows the bus nodes to restart bus communications
cleanly after an error. There are two forms of Error Flag fields. The form of the Error Flag field
depends on the error status of the node that detects the error.
If an error-active node detects a bus error then the node interrupts transmission of the current
message by generating an active error flag. The active error flag is composed of six consecutive
dominant bits. This bit sequence actively violates the bit-stuffing rule. All other stations recognize
the resulting bit-stuffing error and in turn generate Error Frames themselves, called Error Echo
Flags. The Error Flag field therefore consists of between six and twelve consecutive dominant
bits (generated by one or more nodes). The Error Delimiter field completes the Error Frame. After
completion of the Error Frame, bus activity retains to normal and the interrupted node attempts
to resend the aborted message.
If an error passive node detects a bus error then the node transmits an error passive flag followed,
again, by the Error Delimiter field. The error passive flag consists of six consecutive recessive
bits. From this it follows that, unless the bus error is detected by the bus master node or other
error active receiver, that is actually transmitting, the transmission of an Error Frame by an error
passive node will not affect any other node on the network. If the bus master node generates an
error passive flag then this may cause other nodes to generate error frames due to the resulting
bit-stuffing violation. After transmission of an Error Frame, an error passive node must wait for 6
consecutive recessive bits on the bus before attempting to rejoin bus communications.
22.6.1.4 The Overload Frame
An Overload Frame, shown in Figure 22-10, has the same format as an Active Error Frame. An
Overload Frame, however can only be generated during lnterframe Space. This way, an Overload
Frame can be differentiated from an Error Frame (an Error Frame is sent during the transmission
of a message). The Overload Frame consists of 2 fields, an Overload Flag followed by an Overload
Delimiter. The Overload Flag consists of six dominant bits followed by Overload Flags generated
by other nodes (as for active error flag, again giving a maximum of twelve dominant bits).
The Overload Delimiter consists of eight recessive bits. An Overload Frame can be generated by
a node as a result of 2 conditions. First, the node detects a dominant bit during lnterframe Space
which is an illegal condition. Second, due to internal conditions, the node is not yet able to start
reception of the next message. A node may generate a maximum of 2 sequential Overload
Frames to delay the start of the next message.
22.6.1.5 The Interframe Space
Interframe Space separates a proceeding frame (of whatever type) from a following Data or
Remote Frame. lnterframe space is composed of at least 3 recessive bits, called the intermission.
This is provided to allow nodes time for internal processing before the start of the next message
frame. After the intermission, the bus line remains in the recessive state (Bus idle) until the
next transmission starts.
39500 18C Reference Manual.book Page 38 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39522A-page 22-39
Section 22. CAN
CAN
22
Figure 22-6: Standard Data Frame
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
INT Suspend
Transmit
Bus Idle Any Frame
Inter-Frame Space
Start of Frame Data Frame or Remote Frame
3 8
0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
Start of Frame
Data Frame (number of bits = 44 + 8 N)
12
Arbitration Field
ID 10
11
ID3
ID0
Identifier
Message
Filtering
Stored in Buffers
RTR
IDE
RB0
DLC3
DLC0
6
4
Control
Field
Data
Length
Code
Reserved Bits
8N(≤ N ≤ 8)
Data Field
8 8
Stored in Transmit/Receive Buffers
Bit-Stuffing
16
CRC Field
15
CRC
7
End of
Frame
CRC Del
Acknowledgment
ACK Del 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 INT Suspend Transmit Bus Idle Any Frame Inter-Frame Space
Start of Frame Data Frame or Remote Frame
3 8
39500 18C Reference Manual.book Page 39 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39522A-page 22-40
2000 Microchip Technology Inc.
F
igu
r
e
2
2
-
7
:
E
x
t
e
n
d
e
d
D
a
t
a
F
o
r
m
a
t
1 1 1 1 1 0
Bus Idle
Start of Frame Data Frame or Remote Frame
0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
Start of FrameArbitration Field
32
11
ID10
ID3
ID0
IDE
Identifier
Message
Filtering
Stored in Buffers
SRR
EID17
EID0
RTR
RB1
RB0
DLC3
18
DLC0
6
Control
Field
4
Reserved bitsData Length Code Stored in Transmit/Receive Buffers
8 8
Data Frame (number of bits = 64 + 8 N)
8 N (N ≤ 8)
Data Field
1 1 1 1 1 1 1 1
16
CRC Field
15
CRC
CRC Del
Acknowledgment
ACK Del
End of
Frame
7
Bit-Stuffing
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
INT Suspend
Transmit
Bus Idle Any Frame
Inter-Frame Space
Start of Frame Data Frame or Remote Frame 3 8
Extended Identifier
39500 18C Reference Manual.book Page 40 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39522A-page 22-41
Section 22. CAN
CAN
22
Figure 22-8: Remote Data Frame
Identifier
Message
Filtering
Stored in Buffers
Data
Length
Code
Reserved Bits
Bit-Stuffing
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
INT Suspend
Transmit
Bus Idle Any Frame
Inter-Frame Space
Start of Frame Data Frame or Remote Frame
3 8
0 1 0 0 1 1 1 1 1 1 1 1 1
Start of Frame
Remote Frame (number of bits = 44)
12
Arbitration Field
ID 10
11
ID0
RTR
IDE
RB0
DLC3
DLC0
6
4
Control
Field
16
CRC Field
15
CRC
7
End of
Frame
CRC Del
Acknowledgment
ACK Del 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 INT Suspend Transmit Bus Idle Any Frame Inter-Frame Space
Start of Frame Data Frame or Remote Frame
3 8
39500 18C Reference Manual.book Page 41 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39522A-page 22-42 2000 Microchip Technology Inc.
Figure 22-9: Error Frame
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
INT Suspend
Transmit
Bus Idle Any Frame
Inter-Frame Space
Start of Frame Data Frame or Remote Frame
3 8
0 0 0 0
Start of Frame
Interrupted Data Frame
12
Arbitration Field
ID 10
11
ID3
ID0
Identifier
Message
Filtering
RTR
IDE
RB0
DLC3
DLC0
6
4
Control
Field
Data
Length
Code
Reserved Bits
8N (≤ N ≤ 8)
Data Field
8 8
Bit-Stuffing
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
INT Suspend
Transmit
Bus Idle Any Frame
Inter-Frame Space
Start of Frame Data Frame or Remote Frame
3 8
0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0
Data Frame or
Remote Frame
Error Frame
6
Error
Flag
≤ 6
Echo
Error
Flag
8
Error
Delimiter
Inter-Frame Space or
Overload Frame
39500 18C Reference Manual.book Page 42 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39522A-page 22-43
Section 22. CAN
CAN
22
F
i
g
ure 22
-10:
Over
l
oad
Frame 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
INT Suspend
Transmit
Bus Idle Any Frame
Inter-Frame Space
Start of Frame Data Frame or Remote Frame 3 8
0 1 0 0 1 1 1 1 1 1 1 1 1
Start of Frame
Remote Frame (number of bits = 44)
12
Arbitration Field
ID 10
11
ID0
RTR
IDE
RB0
DLC3
DLC0
6
4
Control
Field
16
CRC Field
15
CRC
7
End of
Frame
CRC Del
Acknowledgment
ACK Del
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0
INT Suspend
Transmit
Bus Idle Any Frame
Inter-Frame Space
Start of Frame Data Frame or Remote Frame 3 8
0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
Overload Frame
End of Frame or
Error Delimiter or
Overload Delimiter
6
Overload
Flag
Overload
Delimiter
8 Inter-Frame Space or Error Frame
39500 18C Reference Manual.book Page 43 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39522A-page 22-44 2000 Microchip Technology Inc.
22.7 Modes of Operation
The CAN Module can operate in one of several operation modes selected by the user. These
modes include:
• Initialization Mode
• Disable Mode
• Normal Operation Mode
• Listen Only Mode
• Loop Back Mode
• Error Recognition Mode (selected through CANRXM bits)
Modes are requested by setting the REQOP2:REQOP0 bits except the Error Recognition Mode,
which is requested through the CANRXM bits. Entry into a mode is acknowledged by monitoring
the OPMODE bits. The module will not change the mode and the OPMODE2:OPMODE0 bits
until a change in mode is acceptable, generally during bus idle time which is defined as at least
11 consecutive recessive bits.
22.7.1 Initialization Mode
In the initialization mode, the module will not transmit or receive. The error counters are cleared
and the interrupt flags remain unchanged. The programmer will have access to configuration registers
that are access restricted in other modes. The CAN bus configuration mode is explained
in Section 22.8.
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2000 Microchip Technology Inc. DS39522A-page 22-45
Section 22. CAN
CAN
22
22.7.2 Disable Mode
In Disable Mode, the module will not transmit or receive. The module has the ability to set the
WAKIF bit due to bus activity, however any pending interrupts will remain and the error counters
will retain their value.
If the REQOP2:REQOP0 bits = 001, the module will enter the module disable mode. This mode
is similar to disabling other peripheral modules by turning off the module enables. This causes
the module internal clock to stop unless the module is active (i.e., receiving or transmitting a message).
If the module is active, the module will wait for 11 recessive bits on the CAN bus, detect
that condition as an idle bus then accept the module disable command. When the
OPMODE2:OPMODE0 bits = 001, that indicates whether the module successfully went into
module disable mode (see Figure 22-11).
The WAKIF interrupt is the only module interrupt that is still active in the module disable mode.
If the WAKIE is set, the processor will receive an interrupt whenever the CAN bus detects a dominant
state, as occurs with a Start of Frame (SOF).
The I/O pins will revert to normal I/O function when the module is in the module disable mode.
Figure 22-11: Entering and Exiting Module Disable Mode
1 2 4 5
- Processor writes REQOP2:REQOP0 while module receiving/transmitting message. Module continues with CAN message.
- Module detects 11 recessive bits. Module acknowledges disable mode and sets OPMODE2:OPMODE0 bits. Module disables.
- Processor writes REQOP2:REQOP0 during CAN bus activity. Module waits for 11 recessive bits before accepting activate.
- Module detects 11 recessive bits. Module acknowledges normal mode and sets OPMODE2:OPMODE0 bits. Module activates.
OSC1
CAN BUS
CAN Module
Disabled
3
REQOP2:
OPMODE2:
001
000 001
000 000
000
- CAN bus message will set WAKIF bit. If WAKIE = ’1’, processor will vector to the interrupt address. CAN message ignored.
WAKIF
WAKIE
1
2
3
4
5
REQOP0
OPMODE0
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PIC18C Reference Manual
DS39522A-page 22-46 2000 Microchip Technology Inc.
22.7.2.1 SLEEP Mode
A CPU SLEEP instruction will stop the crystal oscillator and shut down all system clocks. The user
is responsible to take care that the module is not active when the CPU goes into SLEEP mode.
The pins will revert into normal I/O function, dependent on the value in the TRIS register.
The recommended procedure is to bring the module into disabled mode before the CPU SLEEP
instruction is executed.
Figure 22-12 illustrates the sequence of events when a CAN message is received during execution
of the SLEEP instruction.
Figure 22-12:SLEEP Interrupted By Message
2 3 4
- CAN bus activity sets WAKIF flag. If GIE = ’1’ processor will vector to interrupt address, bypassing SLEEP instruction.
- Processor attempts to execute SLEEP instruction. Since WAKIF = ’1’, WAKIE = ’1’ and GIE = ’0’
OSC1
CAN BUS
CAN Module
Disabled
REQOP2:
OPMODE2:
001
000 001
000 000
000
SLEEP
WAKIF
WAKIE
1
- Processor requests and receives module disable mode. Wake up interrupt enabled.
processor will execute NOP in place of SLEEP instruction. CAN message ignored.
- Processor requests and receives module normal mode. CAN activity resumes.
1
2
3
4
0 0
REQOP0
OPMODE0
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Section 22. CAN
CAN
22
22.7.2.2 Wake-up from SLEEP
Figure 22-13 depicts how the CAN module will execute the SLEEP instruction and how the module
wakes up on bus activity. Upon a Wake-up from SLEEP the WAKIF flag is set.
The module will monitor the RX line for activity while the MCU is in SLEEP mode.
If the module is in CPU SLEEP mode and the WAKIE wake-up interrupt enable is set, the module
will generate an interrupt, bringing up the CPU. Due to the delays in starting up the oscillator and
CPU, the message activity that caused the wake-up will be lost.
If the module is in CPU SLEEP mode and the WAKIE is not set, no interrupt will be generated
and the CPU and the module will continue to sleep.
If the CAN module is in disable mode, the module will wake-up and, depending on the condition
of the WAKIE bit, may generate an interrupt. It is expected that the module will correctly receive
the message that caused the wake-up from SLEEP mode.
The module can be programmed to apply a low-pass filter function to the RxCAN input line while
the module or the CPU is in SLEEP mode. This feature can be used to protect the module from
Wake-up due to short glitches on the CAN bus lines. Such glitches can result from electromagnetic
inference within noisy environments. The WAKFIL bit enables or disables the filter.
Figure 22-13:Processor SLEEP and CAN Bus Wake-up Interrupt
TOST
Processor in
SLEEP
2 3 4 5
- Processor executes SLEEP instruction.
- SOF of message wakes up processor. Oscillator start time begins. CAN message lost. WAKIF bit set.
- Processor completes oscillator start time. Processor resumes program or interrupt, based on GIE bits.
accepting CAN bus activity. CAN message lost.
- Module detects 11 recessive bits. Module will begin to receive messages and transmit any pending messages.
OSC1
CAN BUS
CAN Module
Disabled
REQOP2:
OPMODE2:
001
000 001
000 000
000
SLEEP
WAKIF
WAKIE
1
- Processor requests and receives module disable mode. Wake-up interrupt enabled.
Processor requests normal operating mode. Module waits for 11 recessive bits before
1
2
3
4
5
REQOP0
OPMODE0
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22.7.3 Normal Operation Mode
Normal operating mode is selected when REQOP2:REQOP0 = 000. In this mode, the module is
activated, the I/O pins will assume the CAN bus functions. The module will transmit and receive
CAN bus messages as described in subsequent paragraphs.
22.7.4 Listen Only Mode
Listen only mode and loopback modes are special cases of normal operation mode to allow system
debug. If the listen only mode is activated, the module on the CAN bus is passive. The transmitter
buffers revert to Port I/O function. The receive pins remain input. For the receiver, no error
flags or acknowledge signals are sent. The error counters are deactivated in this state. The listen
only mode can be used for detecting the baud rate on the CAN bus. To use this, it is necessary
that there are at least two further nodes that communicate with each other. The baud rate can be
detected empirically by testing different values. This mode is also useful as a bus monitor without
influencing the data traffic.
22.7.5 Error Recognition Mode
The module can be set to ignore all errors and receive any message. The error recognition mode
is activated by setting the RXM1:RXM0 bits in the RXBnCON registers to 11. In this mode the
data which is in the message assembly buffer until the error time is copied in the receive buffer
and can be read via the CPU interface. In addition the data which was on the internal sampling
of the CAN bus at the error time and the state vector of the protocol state machine and the bit
counter CntCan are stored in registers and can be read.
22.7.6 Loop Back Mode
If the loopback mode is activated, the module will connect the internal transmit signal to the internal
receive signal at the module boundary. The transmit and receive pins revert to their Port I/O
function.
The transmitter will receive an acknowledge for its sent messages. Special hardware will generate
an acknowledge for the transmitter.
22.8 CAN Bus Initialization
After a RESET the CAN module is in the configuration mode (OPMODE2 is set). The error
counters are cleared and all registers contain the reset values. It should be ensured that the initialization
is performed before REQOP2 bit is cleared.
22.8.1 Initialization
The CAN module has to be initialized before the activation. This is only possible if the module is
in the configuration mode. The configuration mode is requested by setting REQOP2 bit. Only
when the status bit OPMODE2 has a high level, the initialization can be performed. Afterwards
the configuration registers and the acceptance mask registers and the acceptance filter registers
can be written. The module is activated by setting the control bits CFGREQ to zero.
The module will protect the user from accidentally violating the CAN protocol through programming
errors. All registers which control the configuration of the module can not be modified while
the module is on-line. The CAN module will not be allowed to enter the configuration mode while
a transmission is taking place. The CONFIG mode serves as a lock to protect the following registers.
• All Module Control Registers
• Configuration Registers
• Bus Timing Registers
• Identifier Acceptance Filter Registers
• Identifier Acceptance Mask Registers
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Section 22. CAN
CAN
22
22.9 Message Reception
This chapter describes the message reception.
22.9.1 Receive Buffers
The CAN bus module has 3 receive buffers. However, one of the receive buffers is always committed
to monitoring the bus for incoming messages. This buffer is called the message assembly
buffer, MAB. So there are 2 receive buffers visible, RXB0 and RXB1, that can essentially instantaneously
receive a complete message from the protocol engine. The CPU can be operating on
one while the other is available for reception or holding a previously received message.
The MAB holds the destuffed bit stream from the bus line to allow parallel access to the whole
data or Remote Frame for the acceptance match test and the parallel transfer of the frame to the
receive buffers. The MAB will assemble all messages received. These messages will be transferred
to the RXBn buffers only if the acceptance filter criterion are met. When a message is
received, the RXFUL bit will be set. This bit can only be set by the module when a message is
received. The bit is cleared by the CPU when it has completed processing the message in the
buffer. This bit provides a positive lockout to ensure that the CPU has finished with the message
buffer. If the RXnIE bit is set , an interrupt will be generated when a message is received.
There are 2 programmable acceptance filter masks associated with the receive buffers, one for
each buffer.
When the message is received, the FILHIT2:FILHIT0 bits (RXBnCON register) indicate the
acceptance criterion for the message. The number of the acceptance filter that enabled the
reception will be indicated as well as a status bit that indicates that the received message is a
remote transfer request.
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22.9.1.1 Receive Buffer Priority
To provide flexibility, there are several acceptance filters corresponding to each receive buffer.
There is also an implied priority to the receive buffers. RXB0 is the higher priority buffer and has
2 message acceptance filters associated with it. RXB1 is the lower priority buffer and has 4
acceptance filters associated with it. The lower number of possible acceptance filters makes the
match on RXB0 more restrictive and implies the higher criticality associated with that buffer. Additionally,
if the RXB0 contains a valid message, and another valid message is received, the RXB0
can be setup such that it will not overrun and the new message for RXB0 will be placed into
RXB1. Figure 22-14 shows a block diagram of the receive buffer, while Figure 22-15 shows a flow
chart for receive operation.
Figure 22-14:The Receive Buffers
Acceptance Mask
RXM1
Acceptance Filter
RXF2
Acceptance Filter
RXF3
Acceptance Filter
RXF4
Acceptance Filter
RXF5
R
X
B
1
M
A
B
R
X
B
0
Acceptance Mask
RXM0
Acceptance Filter
RXF0
Acceptance Filter
RXF1
A
c
c
e
p A t c
c
e
p
t
Identifier
Data Field Data Field
Identifier
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Section 22. CAN
CAN
22
Figure 22-15:Receive Flowchart
Start
Detect
Start of
Message
?
Valid
Message
Received
?
Generate
Error
Message
Identifier meets
a filter criteria
?
Is
RXRDY=0
?
Go to Start
Move message into RXB0
Set RXRDY = 1
Set FILHIT<2:0>
Is
RXRDY=0
?
Move message into RXB1
Set RXRDY=1
Yes, meets criteria
for RXBO
Yes, meets criteria
for RXB1
No
Generate
Interrupt Yes
Yes
No No
Yes
Yes
No
No
Yes
Yes
Frame
The RXRDY bit determines if the
receive register is empty and
able to accept a new message.
No Yes
No
Generate Overrun Error:
Begin Loading Message into
Message Assembly Buffer (MAB)
was met
Is
RXIE=1
?
Does
RXIE=1
?
Is
RX0DBEN=1
?
The RX0DBEN bit determines
if RXB0 can roll over
into RXB1 if it is full.
Set RX0OVFL
Generate Overrun Error:
Set RX1OVFL
Does ERRIE=1 ?
No
Go to Start
Yes
Set FILHIT<0> No
according to which filter criteria
was met
Set CANSTAT<3:0> according
to which receive buffer the
message was loaded into
according to which filter criteria
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22.9.2 Message Acceptance Filters
The message acceptance filters and masks are used to determine if a message in the message
assembly buffer should be loaded into either of the receive buffers. Once a valid message has
been received into the MAB, the identifier fields of the message are compared to the filter values.
If there is a match, that message will be loaded into the appropriate receive buffer. The filter
masks are used to determine which bits in the identifiers are examined with the filters. A truthtable
is shown in Table 22-2 that indicates how each bit in the identifier is compared to the masks
and filters to determine if the message should be loaded into a receive buffer. The mask bit
essentially determines which bits to apply the filter to. If any mask bit is set to a zero, then that
bit will automatically be accepted regardless of the filter bit.
Table 22-2: Filter/Mask Truth Table
The acceptance filter looks at incoming messages for the EXIDEN bit to determine how to compare
the identifiers. If the EXIDEN bit is clear, the message is a standard frame, and only filters
with the EXIDEN bit clear are compared. If the EXIDEN bit is set, the message is an extended
frame, and only filters with the EXIDEN bit set are compared. Configuring the RXM1:RXM0 bits
to 01 or 10 can override the EXIDEN bit.
As shown in the Receive Buffers Block Diagram, Figure 22-14, RXF0 and RXF1 filters with RXM0
mask are associated with RXB0. The filters RXF2, RXF3, RXF4, and RXF5 and the mask RXM1
are associated with RXB1. When a filter matches and a message is loaded into the receive buffer,
the number of the filter that enabled the message reception is coded into a portion of the RXBnCON
register. The RXB1CON register contains the FILHIT2:FILHIT0 bits. They are coded as
shown in Table 22-3.
Table 22-3: Acceptance Filter
Mask Bit n Filter Bit n Message
Identifier bit
Accept or
reject bit n
0x x Accept
10 0 Accept
10 1 Reject
11 0 Reject
11 1 Accept
Legend: x = 0 don’t care.
FILHIT2:FILHIT0 Acceptance
Filter Comment
000(1) RXF0 Only if RX0DBEN = 1
001(1) RXF1 Only if RX0DBEN = 1
010 RXF2 —
011 RXF3 —
100 RXF4 —
101 RXF5 —
Note 1: Is only valid if the RX0DBEN bit is set.
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Section 22. CAN
CAN
22
The coding of the RX0DBEN bit enables these 3 bits to be used similarly to the FILHIT bits and
to distinguish a hit on filter RXF0 and RXF1 in either RXB0 or overrun into RXB1.
111 = Acceptance Filter 1 (RXF1)
110 = Acceptance Filter 0 (RXF0)
001 = Acceptance Filter 1 (RXF1)
000 = Acceptance Filter 0 (RXF0)
If the RX0DBEN bit is clear, there are 6 codes corresponding to the 6 filters. If the RX0DBEN bit
is set, there are 6 codes corresponding to the 6 filters plus 2 additional codes corresponding to
RXF0 and RXF1 filters overrun to RXB1.
If more than 1 acceptance filter matches, the FILHIT bits will encode the lowest binary value of
the filters that matched. In other words, if filter 2 and filter 4 match, FILHIT will code the value for
2. This essentially prioritizes the acceptance filters with lower numbers having priority.
Figure 22-16 shows a block diagram of the message acceptance filters.
Figure 22-16:Message Acceptance Filter
Acceptance Filter Register Acceptance Mask Register
RxRqst
Message Assembly Buffer
RXFn0
RXFn1
RXFnn
RXMn0
RXMn1
RXMnn
Identifier
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22.9.3 Receiver Overrun
An overrun condition occurs when the MAB has assembled a valid received message, the message
is accepted through the acceptance filters, however, the receive buffer associated with the
filter has not been designated as clear of the previous message.
The overrun error flag, RXnOVR and the EERIF bit will be set and the message in the MAB will
be discarded. While in the overrun situation, the module will stay synchronized with the CAN bus
and is able to transmit messages but will discard all incoming messages destined for the overrun
buffer.
If the RX0DBEN bit is clear, RXB1 and RXB0 operate independently. When this is the case, a
message intended for RXB0 will not be diverted into RXB1 if RXB0 contains an unread message
and the RX0OVFL bit will be set.
If the RX0DBEN bit is set, the overrun for RXB0 is handled differently. If a valid message is
received for RXB0 and RXFUL = 1 indicates that RXB0 is full and RXFUL = 0 indicates that
RXB1 is empty, the message for RXB0 will be loaded into RXB1. An overrun error will not be generated
for RXB0. If a valid message is received for RXB0 and RXFUL = 1 and RXFUL = 1 indicating
that both RXB0 and RXB1 are full the message will be lost and an overrun will be indicated
for RXB1.
If the RX0DBEN bit is clear, there are 6 codes corresponding to the 6 filters. If the RX0DBEN bit
is set, there are 6 codes corresponding to the 6 filters plus 2 additional codes corresponding to
RXF0 and RXF1 filters overrun to RXB1. These codes are given in Table 22-4.
Table 22-4: Buffer Reception and Overflow Truth Table
Message
Matches
Filter
0 or 1
Message
Matches
Filter
2,3,4,5
RXFUL0
Bit
RXFUL1
Bit
RX0DBEN
Bit Action Action
0 0 XX X None No message received
0 1 X0 X MAB → RXB1 Message for RXB1, RXB1 available
0 1 X1 X MAB discarded
RX1OVFL = 1
Message for RXB1, RXB1 full
1 0 0X X MAB → RXB0 Message for RXB0, RXB0 available
1 0 1X 0 MAB discarded
RX0OVFL = 1
Message for RXB0, RXB0 full,
RX0DBEN not enabled
1 0 10 1 MAB → RXB1 Message for RXB0, RXB0 full,
RX0DBEN enabled, RXB1 available
1 0 11 1 MAB discarded
RX1OVFL = 1
Message for RXB0, RXB0 full,
RX0DBEN enabled, RXB1 full
1 1 0X X MAB → RXB0 Message for RXB0 and RXB1, RXB0
available
1 1 1X 0 MAB discarded
RX0OVFL = 1
Message for RXB0 and RXB1, RXB0 full,
RX0DBEN not enabled
1 1 10 1 MAB → RXB1 Message for RXB0 and RXB1, RXB0 full,
RX0DBEN enabled, RXB1 available
1 1 11 1 MAB discarded
RX1OVFL = 1
Message for RXB0 and RXB1, RXB0 full,
RX0DBEN enabled, RXB1 full
Legend: X = Don’t care.
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Section 22. CAN
CAN
22
22.9.4 Effects of a RESET
Upon any RESET the CAN module has to be initialized. All registers are set according to the
reset values. The content of a received message is lost. The initialization is discussed in
Section 22.8.
22.9.5 Baud Rate Setting
All nodes on any particular CAN bus must have the same nominal bit rate. The Baud Rate is set
once during the initialization mode of the CAN module. After that the baud Rate is not changed
again. Section 22.12 explains the setting of the Baud Rate.
22.9.6 Receive Errors
The CAN module will detect the following receive errors:
• Cyclic Redundancy Check (CRC) Error
• Bit Stuffing Error
• Invalid message receive error.
These receive errors do not generate an interrupt. However, the receive error counter is incremented
by one in case one of these errors occur. The RXWARN bit indicates that the Receive
Error Counter has reached the CPU Warning limit of 96 and an interrupt is generated.
22.9.6.1 Cyclic Redundancy Check (CRC) Error
With the Cyclic Redundancy Check, the transmitter calculates special check bits for the bit
sequence from the start of a frame until the end of the Data Field. This CRC sequence is transmitted
in the CRC Field. The receiving node also calculates the CRC sequence using the same
formula and performs a comparison to the received sequence. If a mismatch is detected, a CRC
error has occurred and an Error Frame is generated. The message is repeated. The receive error
interrupt counter is incremented by one. An Interrupt will only be generated if the error counter
passes a threshold value.
22.9.6.2 Bit Stuffing Error
If in between Start of Frame and CRC Delimiter 6 consecutive bits with the same polarity are
detected, the bit-stuffing rule has been violated. A Bit-Stuffing error occurs and an Error Frame
is generated. The message is repeated. No Interrupt will be generated upon this event.
22.9.6.3 Invalid Message Received Error
If any type of error occurs during reception of a message, an error will be indicated by the IXRIF
bit. This bit can be used (optionally with an interrupt) for autobaud detection with the device in
listen-only mode. This error is not an indicator that any action needs to occur, but an indicator
that an error has occurred on the CAN bus.
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22.9.6.4 Rules for Modifying the Receive Error Counter
The Receive Error Counter is modified according to the following rules:
• When the receiver detects an error, the Receive Error Counter is incremented by 1, except
when the detected error was a Bit Error during the transmission of an Active Error Flag or
an Overload Flag.
• When the receiver detects a "dominant" bit as the first bit after sending an Error Flag the
Receive Error Counter will be incremented by 8.
• If a Receiver detects a Bit Error while sending an Active Error Flag or an Overload Flag the
Receive Error Counter is incremented by 8.
• Any Node tolerates up to 7 consecutive "dominant" bits after sending an Active Error Flag,
Passive Error Flag or an Overload Flag. After detecting the 14th consecutive "dominant" bit
(in case of an Active Error Flag or an Overload flag) or after detecting the 8th consecutive
"dominant" following a passive error flag, and after each sequence of additional eight consecutive
"dominant" bits every Transmitter increases its Transmission Error Counter and
every Receiver increases its Receive Error Counter by 8.
• After a successful reception of a message (reception without error up to the ACK slot and
the successful sending of the ACK bit), the Receive Error Counter is decreased by one, if
the Receive Error Counter was between 1 and 127. If the Receive Error Counter was 0 it
will stay 0. If the Receive Error Counter was greater than 127, it will change to a value
between 119 and 127.
22.9.7 Receive Interrupts
Several Interrupts are linked to the message reception. The receive interrupts can be broken up
into two separate groups:
• Receive Error Interrupts
• Receive interrupts
22.9.7.1 Receive Interrupt
A message has been successfully received and loaded into one of the receive buffers. This interrupt
is activated immediately after receiving the End of Frame (EOF) field. Reading the RXnIF
flag will indicate which receive buffer caused the interrupt. Figure 22-17 depicts when the receive
buffer interrupt flag RXnIF will be set.
22.9.7.2 Wake-up Interrupt
The Wake-up Interrupt sequences are described in Section 22.7.2.2.
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Section 22. CAN
CAN
22
Figure 22-17: Receive Buffer Interrupt Flag
SOF
ID10
ID9
ID8
ID7
ID6
ID5
ID4
ID3
ID2
ID1
RTR
IDE
RB0
DLC3
DLC2
STUFF
DLC1
DLC0
CRC14
CRC13
CRC12
CRC11
CRC10
CRC9
CRC8
CRC7
CRC6
CRC5
CRC4
CRC3
CRC2
CRC1
CRC0
CRCDEL
ACK SIST BIT
ACK DELIMITER
EOF
EOF
EOF
EOF
EOF
EOF
EOF
ID0
RECEIVE BUFFER
INTERRUPT FLAG
DATA
CAN BIT
TIMING
CAN BIT
NAMES
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22.9.7.3 Receive Error Interrupts
A receive error interrupt will be indicated by the ERRIF bit. This bit shows that an error condition
occurred. The source of the error can be determined by checking the bits in the Communication
Status Register COMSTAT. The bits in this register are related to receive and transmit errors. The
following subsequences will show which flags are linked to the receive errors.
22.9.7.3.1 Invalid Message Received Interrupt
If any type of error occurred during reception of the last message, an error will be indicated by
the IXRIF bit. The specific error that occurred is unknown. This bit can be used (optionally with
an interrupt) for autobaud detection with the device in listen only mode. This error is not an indicator
that any action needs to occur, but an indicator that an error has occurred on the CAN bus.
22.9.7.3.2 Receiver Overrun Interrupt
The RXnOVR bit indicates that an Overrun condition occurred. An overrun condition occurs
when the Message Assembly Buffer (MAB) has assembled a valid received message, the message
is accepted through the acceptance filters, however, the receive buffer associated with the
filter is not clear of the previous message. The overflow error interrupt will be set and the message
is discarded. While in the overrun situation, the module will stay synchronized with the CAN
bus and is able to transmit and receive messages.
22.9.7.4 Receiver Warning Interrupt
The RXWARN bit indicates that the Receive Error Counter has reached the CPU Warning limit
of 96. When RXWARN transitions from a 0 to a 1, it will cause the Error Interrupt Flag ERRIF to
become set. This bit cannot be manually cleared, as it should remain an indicator that the
Receive Error Counter has reached the CPU Warning limit of 96. The RXWARN bit will become
clear automatically if the Receive Error Counter becomes less than or equal to 95. The ERRIF
bit can be manually cleared allowing the interrupt service routine to be exited without affecting
the RXWARN bit.
22.9.7.5 Receiver Error Passive
The RXBP bit indicates that the Receive Error Counter has exceeded the Error Passive limit of
127 and the module has gone to Error Passive state. When the RXBP bit transitions from a 0 to
a 1, it will cause the Error Interrupt Flag to become set. The RXBP bit cannot be manually
cleared, as it should remain an indicator that the Bus is in Error State Passive. The RXBP bit will
become clear automatically if the Receive Error Counter becomes less than or equal to 127. The
ERRIF bit can be manually cleared allowing the interrupt service routine to be exited without
affecting the RXBP bit.
22.9.8 Receive Modes
The RXM1:RXM0 bits will set special receive modes. Normally, these bits are set to 00 to enable
reception of all valid messages as accepted by the acceptance filters. In this case, the determination
of whether or not to receive standard or extended messages is determined by the EXIDEN
bit in the Acceptance Filter Registers. If the RXM1:RXM0 bits are set to 01 or 10, the receiver will
accept only messages with standard or extended identifiers respectively. If an acceptance filter
has the EXIDEN bit such that it does not correspond with the RXM1:RXM0 mode, that acceptance
filter is rendered useless. These 2 modes of RXM1:RXM0 bits can be used in systems
where it is known that only standard or extended messages will be on the bus. If the RXM1:RXM0
bits are set to 11, the buffer will receive all messages regardless of the values of the acceptance
filters. Also, if a message has an error before the End of Frame, that portion of the message
assembled in the Message Assembly Buffer (MAB) before the error frame will be loaded into the
buffer. This mode may have some value in debugging a CAN system.
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Section 22. CAN
CAN
22
22.9.8.1 Listen Only Mode
If the receive only mode is activated, the module on the CAN bus is passive. That means that no
error flags or acknowledge signals are sent. The error counters are deactivated in this state. The
receive only mode can be used for detecting the baud rate on the CAN bus. For this it is necessary
that there are at least two further nodes, which communicate with each other. The baud rate
can be detected empirically by testing different values. This mode is also useful as a bus monitor
without influencing the data traffic.
22.9.8.2 Error Recognition Mode
The module can be set to ignore all errors and receive any message. The error recognition mode
is activated by configuring the RXM1:RXM0 bits (RXBnCON registers) = ’11’. In this mode the
data which is in the message assembly buffer until the error time is copied in the receive buffer
and can be read via the CPU interface.
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22.10 Transmission
This subsection describes how the CAN module is used for receiving CAN messages.
22.10.1 Real Time Communication and Transmit Message Buffering
For an application to effectively transmit messages in real time, the CAN nodes must be able to
dominate and hold the bus assuming that nodes messages are of a high enough priority to win
arbitration on the bus. If a node only has 1 transmission buffer, it must transmit a message, then
release the bus while the CPU reloads the buffer. If a node has two transmission buffers, one
buffer could be transmitting while the second buffer is being reloaded. However, the CPU would
need to maintain tight tracking of the bus activity to ensure that the second buffer is reloaded
before the first message completes.
Typical applications require three transmit message buffers. Having three buffers, one buffer can
be transmitting, the second buffer can be ready to transmit as soon as the first is complete, and
the third can be reloaded by the CPU. This eases the burden of the software to maintain synchronization
with the bus (see Figure 22-18).
Additionally, having three buffers allows some degree of prioritizing of the outgoing messages.
For example, the application software may have a message enqueued in the second buffer while
it is working on the third buffer. The application may require that the message going into the third
buffer is of higher importance than the one already enqueued. If only 2 buffers are available, the
enqueued message would have to be deleted and replaced with the third. The process of deleting
the message may mean losing control of the bus. With 3 buffers, both the second and the
third message can be enqueued, and the module can be instructed that the third message is
higher priority than the second. The third message will be the next one sent followed by the second.
22.10.2 Transmit Message Buffers
The CAN module has three transmit buffers. Each of the three buffers occupies 14 bytes of data.
Eight of the bytes are the maximum 8 bytes of the transmitted message. Five bytes hold the standard
and extended identifiers and other message arbitration information.
The last byte is a control byte associated with each message. The information in this byte determines
the conditions under which the message will be transmitted and indicates status of the
transmission of the message.
The TXBnIF bit will be set and the TXREQ bit will be clear, indicating that the message buffer has
completed a transmission. The CPU will then load the message buffer with the contents of the
message to be sent. At a minimum, the standard identifier register TXBnSIDH and TXBnSIDL
must be loaded. If data bytes are present in the message, the TXBnDm registers are loaded. If
the message is to use extended identifiers, the TXBnEIDm registers are loaded and the EXIDEN
bit is set.
Prior to sending the message, the user must initialize the TXIE bit to enable or disable an interrupt
when the message is sent. The user must also initialize the transmit priority. Figure 22-18
shows a block diagram of the transmit buffers.
Figure 22-18:Transmit Buffers TXREQ
TXB0
TXABT
TXLARB
TXERR
TXBUFE
MESSAGE
Message
Queue
Control Transmit Byte Sequencer TXREQ
TXB1
TXABT
TXLARB
TXERR
TXBUFE
MESSAGE
TXREQ
TXB2
TXABT
TXLARB
TXERR
TXBUFE
MESSAGE
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Section 22. CAN
CAN
22
22.10.3 Transmit Message Priority
Transmit priority is a prioritization within each node of the pending transmittable messages. Prior
to sending the SOF (Start of Frame), the priorities of all buffers ready for transmission are compared.
The transmit buffer with the highest priority will be sent first. For example, if transmit buffer
0 has a higher priority setting than transmit buffer 1, buffer 0 will be sent first. If two buffers have
the same priority setting, the buffer with the highest address will be sent. For example, if transmit
buffer 1 has the same priority setting as transmit buffer 0, buffer 1 will be sent first. There are 4
levels of transmit priority. If TXPRI1:TXPRI0 for a particular message buffer is set to 11, that
buffer has the highest priority. If TXPRI1:TXPRI0 for a particular message buffer is set to 10 or
01, that buffer has an intermediate priority. If TXPRI1:TXPRI0 for a particular message buffer is
00, that buffer has the lowest priority.
22.10.4 Message Transmission
To initiate transmitting the message, the TXREQ bit must be set. The CAN bus module resolves
any timing conflicts between setting of the TXREQ bit and the SOF time, ensuring that if the priority
was changed, it is resolved correctly before SOF. When TXREQ is set the TXABT, TXLARB
and TXERR flag bits will be cleared.
Setting TXREQ bit does not actually start a message transmission, it flags a message buffer as
enqueued for transmission. Transmission will start when the module detects an available bus for
SOF. The module will then begin transmission on the message which has been determined to
have the highest priority.
If the transmission completes successfully on the first try, the TXREQ bit will clear and an interrupt
will be generated if TXIE was set.
If the message fails to transmit, one of the other condition flags will be set, the TXREQ bit will
remain set indicating that the message is still pending for transmission. If the message tried to
transmit but encountered an error condition, the TXERR bit will be set. In this case, the error condition
can also cause an interrupt. If the message tried to transmit but lost arbitration, the
TXLARB bit will be set. In this case, no interrupt is available to signal the loss of arbitration.
22.10.5 Transmit Message Aborting
The system can also abort a message by clearing the TXREQ bit associated with each message
buffer. Setting the ABAT bit will request an abort of all pending messages. If the message has
not yet started transmission, or if the message started but is interrupted by loss of arbitration or
an error; the abort will be processed. The abort is indicated when the module sets the TXABT bit,
and the TXnIF flag is not automatically set.
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Figure 22-19:Transmit Flowchart
Start
Is
CAN bus available
to start transmission
No
Examine TXPRI <1:0> to
Are any
TXREQ
?
bits = 1
The message transmission sequence begins when
the device determines that the TXREQ for any of the
transmit registers has been set.
Clear: TXABT, TXLARB,
and TXERR
Yes
?
Does
TXREQ=0
ABAT =1
Clearing the TXREQ bit while it is set, or setting
the ABAT bit before the message has started
transmission will abort the message.
No
Begin transmission (SOF)
Abort Transmission:
Was
message transmitted
successfully?
No
Yes
Set TXREQ=0
Is
TXIE=1? Generate
Interrupt
Yes
Yes
Set TXABT=1
Set
Set
TXERR=1
Yes
No
Determine Highest Priority Message
No
?
Does
TXLARB=1?
The TXIE bit determines if an interrupt
should be generated when a
message is successfully transmitted.
END
Does
TXREQ=0
or TXABT =1
?
Yes
No
TXBUFE=1
Yes
A message can also be
aborted if a message error or
lost arbitration condition
occurred during transmission.
Arbitration lost during
transmission
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Section 22. CAN
CAN
22
22.10.6 Transmit Boundary Conditions
The module handles transmit commands which are not necessarily synchronized to the CAN bus
message framing time.
22.10.6.1 Clearing TXREQ bit as a Message Starts
The TXREQ bit can be cleared just when a message is starting transmission, with the intent of
aborting the message. If the message is not being transmitted, the TXABT bit will be set, indicating
that the Abort was successfully processed.
When the user clears the TXREQ bit and the TXABT bit is not set two cycles later, the message
has already begun transmission.
If the message is being transmitted, the abort is not immediately processed, at some point later,
the TXnIF Interrupt Flag or the TXABT bit is set. If transmission has begun the message will only
be aborted if either an error or a loss of arbitration occurs.
22.10.6.2 Setting TXABT bit as a Message Starts
Setting the ABAT bit will abort all pending transmit buffers and has the function of clearing all of
the TXREQ bits for all buffers. The boundary conditions are the same as clearing the TXREQ bit.
22.10.6.3 Clearing TXREQ bit as a Message Completes
The TXREQ bit can be cleared when a message is just about to successfully complete transmission.
Even if the TXREQ bit is cleared by the Data bus a short time before it will be cleared by
the successful transmission of the message, the TXnIF flag will still be set due to the successful
transmission.
22.10.6.4 Setting TXABT bit as a Message Completes
The boundary conditions are the same as clearing the TXREQ bit.
22.10.6.5 Clearing TXREQ bit as a Message Loses Transmission
The TXREQ bit can be cleared when a message is just about to be lost to arbitration or an error.
If the TXREQ signal falls before the loss of arbitration signal or error signal, the result will be like
clearing TXREQ during transmission. When the arbitration is lost or the error is set, the TXABT
bit will be set, as it will see that an error has occurred while transmitting, and that the TXREQ bit
was not set.
If the TXREQ bit falls after the arbitration signal has entered the block, the result will be like clearing
TXREQ during an inactive transmit time. The TXABT bit will be set.
22.10.6.6 Setting TXABT bit as a Message Loses Transmission
The boundary conditions are the same as clearing the TXREQ bit.
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22.10.7 Effects of a RESET
Upon any RESET the CAN module has to be initialized. All registers are set according to the
reset values. The content of a received message is lost. The initialization is discussed in
Section 22.8.
22.10.8 Baud Rate Setting
All nodes on any particular CAN bus must have the same nominal bit rate. The baud rate is set
once during the initialization phase of the CAN module. After that, the baud rate is not changed
again. Section 22.12 explains the setting of the Baud Rate.
22.10.9 Transmit Message Aborting
The system can also abort a message by clearing the TXREQ bit associated with each message
buffer. Setting the ABAT bit will request an abort of all pending messages (see Figure 22-21). A
queued message is aborted by clearing the TXREQ bit. Aborting a queued message is illustrated
in Figure 22-20. If the message has not yet started transmission, or if the message started but is
interrupted by loss of arbitration or an error; the abort will be processed. The abort is indicated
when the module sets the TXABT bits. If the message has started to transmit, it will attempt to
transmit the current message fully (see Figure 22-22). If the current message is transmitted fully,
and is not lost to arbitration or an error, the TXABT bit will not be set, because the message was
transmitted successfully. Likewise, if a message is being transmitted during an abort request, and
the message is lost to arbitration (see Figure 22-23) or an error, the message will not be re-transmitted,
and the TXABT bit will be set, indicating that the message was successfully aborted.
Figure 22-20:Abort Queued Message
1 2
- Processor sets TXREQ while module receiving/transmitting message. Module continues with CAN message.
- Processor clears TXREQ while module looking for 11 recessive bits.
CAN BUS
3
TXREQ
- Another module takes the available transmit slot.
CANTX0
TXIF
TXABT
Module aborts pending transmission, sets TXABT bit in 2 clocks.
1
2
3
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Section 22. CAN
CAN
22
Figure 22-21:Abort All Messages
Figure 22-22:Failed Abort During Transmission
1 2
- Processor sets TXREQ while module receiving/transmitting message. Module continues with CAN message.
- Processor sets ABAT while module looking for 11 recessive bits. Module clears TXREQ bits.
CAN BUS
3
TXREQ
- Another module takes the available transmit slot.
CANTX0
TXIF
TXABT
ABAT
Module aborts pending transmission, sets TXABT bit.
1
2
3
1 2
- Processor sets TXREQ while module receiving/transmitting message. Module continues with CAN message.
- Module detects 11 recessive bits. Module begins transmission of queued message.
CAN BUS
TXREQ
- Processor clears TXREQ requesting message abort. Abort cannot be acknowledged.
CANTX0
TXIF
TXABT
3 4
- At successful completion of transmission, TXREQ bit remains clear and TXIF bit set. TXABT remains clear.
1
2
3
4
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Figure 22-23:Loss of Arbitration During Transmission
22.10.10 Transmission Errors
The CAN module will detect the following transmission errors:
• Acknowledge Error
• Form Error
• Bit Error
These transmission errors will not necessarily generate an interrupt but are indicated by the
transmission error counter. However, each of these errors will cause the transmission error
counter to be incremented by one. Once the value of the error counter exceeds the value of 96,
the ERRIF and the TXWARN bit are set. Once the value of the error counter exceeds the value
of 96 an interrupt is generated and the TXWARN bit in the error flag register is set.
An example transmission error is illustrated in Figure 22-24.
Figure 22-24:Error During Transmission
1 2 4 5
- Processor sets TXREQ while module inactive. TXLARB bit cleared.
- Module in inactive state. Module begins transmission of queued message.
- Module waits for 11 recessive bits before re-trying transmission of queued message.
- At successful completion of transmission, TXREQ bit cleared and TXIF bit set.
CAN BUS
3
TXREQ
- Message loses arbitration. Module releases bus and sets TXLARB bit.
CANTX0
TXIF
TXLARB
1
2
3
4
5
1 2 4 5
- Processor sets TXREQ while module inactive. TXERR bit is cleared.
- Module in inactive state. Module begins transmission of queued message.
- Module waits for 11 recessive bits before re-trying transmission of queued message.
- At successful completion of transmission, TXREQ bit cleared and TXIF bit set.
CAN BUS
3
TXREQ
- Module detects error during transmission, releases bus and sets TXERR bit.
CANTX0
TXIF
TXERR
1
2
3
4
5
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Section 22. CAN
CAN
22
22.10.10.1 Acknowledge Error
In the Acknowledge Field of a message, the transmitter checks if the Acknowledge Slot (which it
has sent out as a recessive bit) contains a dominant bit. If not, no other node has received the
frame correctly. An Acknowledge Error has occurred and the message has to be repeated. No
Error Frame is generated.
22.10.10.2 Form Error
lf a transmitter detects a dominant bit in one of the four segments including End of Frame, lnterframe
Space, Acknowledge Delimiter or CRC Delimiter; then a Form Error has occurred and an
Error Frame is generated. The message is repeated.
22.10.10.3 Bit Error
A Bit Error occurs if a transmitter sends a dominant bit and detects a recessive bit. In the case
where the transmitter sends a recessive bit and a dominant bit is detected during the Arbitration
Field and the Acknowledge Slot, no bit error is generated because normal arbitration is occurring.
22.10.10.4 Rules for Modifying the Transmit Error Counter
The Transmit Error Counter is modified according to the following rules:
• When the Transmitter sends an error flag the Transmit Error Counter is increased by 8 with
the following exceptions. In these two exceptions, the Transmit Error Counter is not
changed.
- If the transmitter is "error passive" and detects an acknowledgment error because of
not detecting a "dominant" ACK, and does not detect a "dominant" bit while sending a
Passive Error Flag.
- If the Transmitter sends an Error Flag because of a bit-stuffing Error occurred during
arbitration whereby the Stuffbit is located before the RTR bit, and should have been
"recessive", and has been sent as "recessive" but monitored as "dominant".
• If a Transmitter detects a Bit Error while sending an Active Error Flag or an Overload Flag
the Transmit Error Counter is increased by 8.
• Any Node tolerates up to 7 consecutive "dominant" bits after sending an Active Error Flag,
Passive Error Flag or an Overload Flag. After detecting the 14th consecutive "dominant" bit
(in case of an Active Error Flag or an Overload flag) or after detecting the 8th consecutive
"dominant" following a passive error flag, and after each sequence of eight additional consecutive
"dominant" bits, every Transmitter increases its Transmission Error Counter and
every Receiver increases its Receive Error Counter by 8.
• After the successful transmission of a message (getting an acknowledge and no error until
End of Frame is finished) the Transmit Error Counter is decreased by one unless it was
already 0.
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22.10.11 Transmission Interrupts
There are several interrupts linked to the message transmission. The transmission interrupts can
be broken up into two groups:
• Transmission interrupts
• Transmission error interrupts
22.10.11.1 Transmit Interrupt
At least one of the three transmit buffers is empty (not scheduled) and can be loaded to schedule
a message for transmission. Reading the TXIF flags will indicate which transmit buffer is available
and caused the interrupt.
22.10.11.2 Transmission Error Interrupts
A transmission error interrupt will be indicated by the ERRIF flag. This flag shows that an error
condition occurred. The source of the error can be determined by checking the error flags in the
Communication Status register COMSTAT. The flags in this register are related to receive and
transmit errors. The following subsequences will show which flags are linked to the transmit
errors.
22.10.11.3 Transmitter Warning Interrupt
The TXWARN bit indicates that the Transmit Error Counter has reached the CPU Warning limit
of 96. When this bit transitions from a 0 to a 1, it will cause the Error Interrupt Flag to become
set. The TXWARN bit cannot be manually cleared, as it should remain as an indicator that the
Transmit Error Counter has reached the CPU Warning limit of 96. The TXWARN bit will become
clear automatically if the Transmit Error Counter becomes less than or equal to 95. The ERRIF
flag can be manually cleared allowing the interrupt service routine to be exited without affecting
the TXWARN bit.
22.10.11.4 Transmitter Error Passive
The TXEP bit indicates that the Transmit Error Counter has exceeded the Error Passive limit of
127 and the module has gone to Error Passive state. When this bit transitions from a 0 to a 1, it
will cause the Error Interrupt Flag to become set. The TXEP bit cannot be manually cleared, as
it should remain as an indicator that the Bus is in Error State Passive. The TXEP bit will become
clear automatically if the Transmit Error Counter becomes less than or equal to 127. The ERRIF
flag can be manually cleared allowing the interrupt service routine to be exited without affecting
the TXEP bit.
22.10.11.5 Bus Off Interrupt
The TXBO bit indicates that the Transmit Error Counter has exceeded 255 and the module has
gone to Bus Off state. When this bit transitions from a 0 to a 1, it will cause the Error Interrupt
Flag to become set. The TXBO bit cannot be manually cleared, as it should remain as an indicator
that the Bus is Off. The ERRIF flag can be manually cleared allowing the interrupt service routine
to be exited without affecting the TXBO bit.
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Section 22. CAN
CAN
22
22.11 Error Detection
The CAN protocol provides sophisticated error detection mechanisms. The following errors can
be detected. These errors are either receive or transmit errors.
Receive errors are:
• Cyclic Redundancy Check (CRC) Error (see Section 22.9.6.1)
• Bit Stuffing Bit Error (see Section 22.9.6.2)
• lnvalid Message Received Error (see Section 22.9.6.2)
The transmit errors are
• Acknowledge Error (see Section 22.10.10.1)
• Form Error (see Section 22.10.10.2)
• Bit Error (see Section 22.10.10.3)
22.11.1 Error States
Detected errors are made public to all other nodes via Error Frames. The transmission of the
erroneous message is aborted and the frame is repeated as soon as possible. Furthermore, each
CAN node is in one of the three error states "error active", "error passive" or "bus off" according
to the value of the internal error counters. The error-active state is the usual state where the bus
node can transmit messages and active Error Frames (made of dominant bits) without any
restrictions. In the error-passive state, messages and passive Error Frames (made of recessive
bits) may be transmitted. The bus-off state makes it temporarily impossible for the station to participate
in the bus communication. During this state, messages can neither be received nor transmitted.
22.11.2 Error Modes and Error Counters
The CAN controller contains the two error counters Receive Error Counter (RXERRCNT) and
Transmit Error Counter (TXERRCNT). The values of both counters can be read by the CPU.
These counters are incremented or decremented according to the CAN bus specification.
The CAN controller is error active if both error counters are below the error passive limit of 128.
It is error passive if at least one of the error counters equals or exceeds 128. It goes bus off if the
Transmit Error Counter equals or exceeds the bus off limit of 256. The device remains in this
state, until the bus off recovery sequence is finished, which is 128 consecutive 11 recessive bit
times. Additionally, there is a error state warning flag bit, EWARN, which is set if at least one of
the error counters equals or exceeds the error warning limit of 96. EWARN is reset if both error
counters are less than the error warning limit.
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Figure 22-25:Error Modes
22.11.3 Error Flag Register
The values in the error flag register indicate which error(s) caused the Error Interrupt Flag. The
RXXOVR Error Flags have a different function than the other Error Flag bits in this register. The
RXXOVR bits must be cleared in order to clear the ERRIF interrupt flag. The other Error Flag bits
in this register will cause the ERRIF interrupt flag to become set as the value of the Transmit and
Receive Error Counters crosses a specific threshold. Clearing the ERRIF interrupt flag in these
cases will allow the interrupt service routine to be exited without recursive interrupt occurring. It
may be desirable to disable specific interrupts after they have occurred once to stop the device
from interrupting repeatedly as the Error Counter moves up and down in the vicinity of a threshold
value.
Bus
Off
Error
Active
Error
Passive
RXERRCNT > 127 or
TXERRCNT > 127
RXERRCNT < 127 or
TXERRCNT < 127
TXERRCNT > 255
128 occurrences of
11 consecutive
"recessive" bits
Reset
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Section 22. CAN
CAN
22
22.12 Baud Rate Setting
All nodes on any particular CAN bus must have the same nominal bit rate. The CAN bus uses
NRZ coding which does not encode a clock. Therefore the receivers independent clock must be
recovered by the receiving nodes and synchronized to the transmitters clock.
In order to set the baud rate the following bits have to be initialized:
• Synchronization Jump Width (see Section 22.12.6.2)
• Baud rate prescaler (see Section 22.12.2)
• Phase segments (see Section 22.12.4)
• Length determination of Phase segment 2 (see Section 22.12.4)
• Sample Point (see Section 22.12.5)
• Propagation segment bits (see Section 22.12.3)
22.12.1 Bit Timing
As oscillators and transmission time may vary from node to node, the receiver must have some
type of PLL synchronized to data transmission edges to synchronize and maintain the receiver
clock. Since the data is NRZ coded, it is necessary to include bit-stuffing to ensure that an edge
occurs at least every 6 bit times, to maintain the Digital Phase Lock Loop (DPLL) synchronization.
Bus timing functions executed within the bit time frame, such as synchronization to the local oscillator,
network transmission delay compensation, and sample point positioning, are defined by the
programmable bit timing logic of the DPLL.
All controllers on the CAN bus must have the same baud rate and bit length. However, different
controllers are not required to have the same master oscillator clock. At different clock frequencies
of the individual controllers, the baud rate has to be adjusted by adjusting the number of time
quanta in each segment.
The Nominal Bit Time can be thought of as being divided into separate non-overlapping time segments.
These segments are shown in Figure 22-26.
• Synchronization segment (Sync Seg)
• Propagation time segment (Prop Seg)
• Phase buffer segment 1 (Phase1 Seg)
• Phase buffer segment 2 (Phase2 Seg)
The time segments and also the nominal bit time are made up of integer units of time called time
quanta or TQ. By definition, the Nominal Bit Time has a minimum of 8 TQ and a maximum of
25 TQ. Also, by definition the minimum nominal bit time is 1 usec, corresponding to a maximum
1 MHz bit rate.
Figure 22-26:CAN Bit Timing
Input Signal
Sync Prop
Segment
Phase
Segment 1
Phase
Segment 2 Sync
Sample Point
TQ
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22.12.2 Prescaler Setting
There is a programmable prescaler, with integral values ranging at least from 1 to 64, in addition
to a fixed divide by 2 for clock generation. The Time Quanta (TQ) is a fixed unit of time derived
from the oscillator period. Time quanta is defined as:
Equation 22-1:Time Quanta for Clock Generation
Example 22-1:Calculation for Fosc = 16 MHz
Example 22-2:Calculation for Fosc = 32 MHz
Example 22-3:Calculation for Fosc = 32 MHz and 25 TQ
The frequencies of the oscillators in the different nodes must be coordinated in order to provide
a system-wide specified time quantum. This means that all oscillators must have a Tosc that is a
integral divisor of TQ.
22.12.3 Propagation Segment
This part of the bit time is used to compensate physical delay times within the network. These
delay times consist of the signal propagation time on the bus line and the internal delay time of
the nodes. The delay is calculated as the round trip from transmitter to receiver as twice the signal's
propagation time on the bus line, the input comparator delay, and the output driver delay.
The Propagation Segment can be programmed from 1 TQ to 8 TQ by setting the
PRSE2:PRSEG0 bits.
22.12.4 Phase Segments
The phase segments are used to optimally locate the sampling of the received bit within the
transmitted bit time. The sampling point is between Phase1 Segment and Phase2 Segment.
These segments are lengthened or shortened by resynchronization. The end of the Phase1 Segment
determines the sampling point within a bit period. The segment is programmable from 1 TQ
to 8 TQ. Phase2 Segment provides delay to the next transmitted data transition. The segment is
programmable from 1 TQ to 8 TQ or it may be defined to be equal to the greater of Phase1 Segment
or the Information Processing Time. The phase segment 1 is initialized by setting bits
SEG1PH2:SEG1PH0, and phase segment 2 is initialized by setting SEG2PH2:SEG2PH0.
TQ 2 ( ) BaudRate + 1 TOSC = ⋅ ⋅
Where Baud Rate is the binary value of BRP <5:0>
If FOSC = 16 MHz, BRP5:BRP0 = 00h, and Nominal Bit Time = 8 TQ; then TQ = 125 nsec
and Nominal Bit Rate = 1 MHz
If FOSC = 32 MHz, BRP5:BRP0 = 01h, and Nominal Bit Time = 8 TQ; then TQ = 125 nsec
and Nominal Bit Rate = 1 MHz
If FOSC = 32 MHz, BRP5:BRP0 = 3Fh, and Nominal Bit Time = 25 TQ; then TQ = 4 usec
and Nominal Bit Rate = 10 kHz
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Section 22. CAN
CAN
22
22.12.5 Sample Point
The sample point is the point of time at which the bus level is read and interpreted as the Value
of that respective bit. The location is at the end of Phase Segment 1. If the bit timing is slow and
contains many TQ, it is possible to specify multiple sampling of the bus line at the sample point.
The level determined by the CAN bus then corresponds to the result from the majority decision
of three values. The majority samples are taken at the sample point and twice before with a distance
of TQ/2. The CAN module allows to chose between sampling three times at the same point
or once at the same point. This is done by setting or clearing the SAM bit (BRG2CON register).
22.12.6 Synchronization
To compensate for phase shifts between the oscillator frequencies of the different bus stations,
each CAN controller must be able to synchronize to the relevant signal edge of the incoming signal.
When an edge in the transmitted data is detected, the logic will compare the location of the
edge to the expected time (Synchronous Segment). The circuit will then adjust the values of
Phase1 Segment and Phase2 Segment. There are 2 mechanisms used to synchronize.
22.12.6.1 Hard Synchronization
Hard Synchronization is only done whenever there is a 'recessive' to 'dominant' edge during Bus
Idle, indicating the start of a message. After hard synchronization, the bit time counters are
restarted with Synchronous Segment. Hard synchronization forces the edge which has caused
the hard synchronization to lie within the synchronization segment of the restarted bit time. Due
to the rules of synchronization, if a hard synchronization is done, there will not be a resynchronization
within that bit time.
22.12.6.2 Resynchronization
As a result of resynchronization Phase Segment 1 may be lengthened or Phase Segment 2 may
be shortened. The amount of lengthening or shortening (SJW1:SJW0) of the phase buffer segment
has an upper bound given by the resynchronization jump width bits. The value of the synchronization
jump width will be added to Phase Segment 1 or subtracted from Phase Segment
2. The resynchronization jump width is programmable between 1 TQ and 4 TQ.
Clocking information will only be derived from transitions of recessive to dominant bus states.
The property that only a fixed maximum number of successive bits have the same value ensures
resynchronizing a bus unit to the bit stream during a frame (e.g. bit-stuffing).
The Phase Error of an edge is given by the position of the edge relative to Synchronous Segment,
measured in Time Quanta. The Phase Error is defined in magnitude of TQ as follows:
• e = 0 if the edge lies within Synchronous Segment.
• e > 0 if the edge lies before the Sample Point.
• e < 0 if the edge lies after the Sample Point of the previous bit.
If the magnitude of the phase error is less than or equal to the programmed value of the resynchronization
jump width, the effect of a resynchronization is the same as that of a hard synchronization,
If the magnitude of the phase error is larger than the resynchronization jump width, and if the
phase error is positive, then Phase Segment 1 is lengthened by an amount equal to the
resynchronization jump width.
If the magnitude of the phase error is larger than the resynchronization jump width, and if the
phase error is negative, then Phase Segment 2 is shortened by an amount equal to the
resynchronization jump width.
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Figure 22-27:Lengthening a Bit Period
Figure 22-28:Shortening a Bit Period
22.12.7 Programming Time Segments
Some requirements for programming of the time segments:
Propagation Segment + Phase1 Segment > = Phase2 Segment
Phase2 Segment > Synchronous Jump Width
Example 22-4:Segment Time
Typically, the sampling of the bit should take place at about 60 - 70% of the bit time, depending
on the system parameters.
Synchronous Segment = 1 TQ; Propagation Segment = 2 TQ; So setting Phase Segment
1=7TQ would place the sample at 10 TQ after the transition. This would leave 6 TQ for Phase
Segment 2.
Since Phase Segment 2 is 6, by the rules, the SJW1:SJW0 bits could be set to the maximum of
4 TQ. However, normally a large synchronization jump width is only necessary when the clock
generation of the different nodes is inaccurate or unstable, such as using ceramic resonators. So
a synchronization jump width of 1 is typically enough.
Input Signal
Sync Propagation
Segment
Phase
Segment 1
Phase
Segment 2 ≤ sjw
Sample Nominal Actual Bit
Point Bit Length Length
TQ
Input Signal
Sync Propagation
Segment
Phase
Segment 1
Phase
Segment 2 ≤ sjw
Sample Actual Nominal
Bit Length
TQ
Point Bit Length
CAN Baud Rate = 125 kHz
TOSC = 50 nsec
bit time = 16 TQ
FOSC = 20 MHz
Then:
BRP5:BRP0 = 04h, → TQ = 500 nsec
For:
125 kHz
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Section 22. CAN
CAN
22
22.13 Interrupts
The module has several sources of interrupts. Each of these interrupts can be individually
enabled or disabled. A PIR register contains interrupt flags. A PIE register contains the enables
for the 8 main interrupts. A special set of read-only bits in the CANSTAT register
(ICODE2:ICODE0) can be used in combination with a jump table for efficient handling of interrupts.
All interrupts have one source, with the exception of the Error Interrupt. Any of the Error Interrupt
sources can set the Error Interrupt Flag. The source of the Error Interrupt can be determined by
reading the Communication Status (COMSTAT) register.
The interrupts can be broken up into two categories: receive and transmit interrupts.
The receive related interrupts are:
• Receive Interrupt (see Section 22.9.7.1)
• Wake-up Interrupt (see Section 22.9.7.2)
• Receiver Overrun Interrupt (see Section 22.9.7.3.2)
• Receiver Warning Interrupt (see Section 22.9.7.4)
• Receiver Error Passive Interrupt (Section 22.9.7.5)
The Transmit related interrupts are
• Transmit interrupt (see Section 22.10.11.1)
• Transmitter Warning Interrupt (Section 22.10.11.3)
• Transmitter Error Passive Interrupt (see Section 22.10.11.4)
• Bus Off Interrupt (see Section 22.10.11.5)
22.13.1 Interrupt Acknowledge
Interrupts are directly associated with one or more status flags in either a PIR or COMSTAT registers.
Interrupts are pending as long as one of the corresponding flags is set. The flags in the
registers must be reset within the interrupt handler in order to handshake the interrupt. A flag can
not be cleared if the respective condition still prevails, with the exception being interrupts that are
caused by a certain value being reached in one of the Error Counter Registers.
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22.13.2 The ICODE Bits
The ICODE2:ICODE0 bits are a set of read-only bits designed for efficient handling of interrupts
via a jump table. The ICODE2:ICODE0 bits can only display one interrupt at a time because the
interrupt bits are multiplexed into this register. Therefore, the pending interrupt with the highest
priority and enabled interrupt is reflected in the ICODE2:ICODE0 bits. Once the highest priority
interrupt flag has been cleared, the next highest priority interrupt code is reflected in the
ICODE2:ICODE0 bits. An interrupt code for a corresponding interrupt can only be displayed if
both its interrupt flag and interrupt enable are set. Table 22-5 describes the operation of the
ICODE2:ICODE0 bits.
Table 22-5: ICODE Bits Decode Table
ICODE2:ICODE0 Boolean Expression
000 ERR•WAK•TX0•TX1•TX2•RX0•RX1
001 ERR
100 ERR•TX0
011 ERR•TX0•TX1
010 ERR•TX0•TX1•TX2
110 ERR•TX0•TX1•TX2•RX0
101 ERR•TX0•TX1•TX2•RX0•RX1
111 ERR•TX0•TX1•TX2•RX0•RX1•WAK
Legend: ERR = ERRIF • ERRIE
TX0 = TX0IF • TX0IE
TX1 = TX1IF • TX1IE
TX2 = TX2IF • TX2IE
RX0 = RX0IF • RX0IE
RX1 = RX1IF • RX1IE
WAK = WAKIF • WAKIE
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2000 Microchip Technology Inc. DS39522A-page 22-77
Section 22. CAN
CAN
22
22.14 Timestamping
The CAN module will generate a signal that can be selected to a timer capture input whenever a
valid frame has been accepted. Because the CAN specification defines a frame to be valid if no
errors occurred before the EOF field has been transmitted successfully, the timer signal will be
generated right after the EOF. A pulse of one bit time is generated.
22.15 CAN Module I/O
The CAN bus module communicates on up to 3 I/O pins. There are 1 or 2 transmit pins and 1
receive pin. These pins are multiplexed with normal digital I/O functions of the device. The
CIOCON register controls the functions of the I/O pins.
When the module is in the configuration mode, module disable mode or loopback mode, the I/O
pins revert to a Port I/O function.
When the module is active, the TX0 pin is always dedicated to the CAN output function. If a single
ended driver is needed, then only the TX0 pin is required. If a differential driver is required, then
the TX1 pin must be enabled by setting the TX1EN bit. If the bus requires an active pull-up on
the line, the ENDRHI bit should be cleared.
The TRIS bits associated with the transmit pins are overridden by the CAN bus modes. If the
CAN module expects an output to be driving, it will be regardless of the state of the TRIS bit associated
with that pin.
The output buffers for the TX0 and TX1 pin are designed such that the rise and fall rate of the
output signal is approximately equal as is necessary for differential drive.
The module can receive the CAN input on one digital input line.
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22.16 Design Tips
Question 1: My CAN module does not seem to work after a RESET.
Answer 1:
Ensure that you reinitialize your CAN bus module. After a RESET, the CAN bus module will automatically
go into the initialization mode.
Question 2: I constantly get a Receive error warning interrupt.
Answer 2:
Ensure that your CAN module is set up correctly. Check if the Baud rate is set correctly.
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2000 Microchip Technology Inc. DS39522A-page 22-79
Section 22. CAN
CAN
22
22.17 Related Application Notes
This subsection lists application notes that are related to this subsection of the manual. These
application notes may not be written for the Mid-range family (that is they may be written for the
Baseline, or the High-end), but the concepts are pertinent, and could be used (with modification
and possible limitations). The current application notes related to this section are:
Title Application Note #
An Introduction to the CAN Protocol AN713
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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DS39522A-page 22-80 2000 Microchip Technology Inc.
22.18 Revision History
Revision A
This is the initial released revision of this document.
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2000 Microchip Technology Inc. DS39523A-page 23-1
Comparator
Voltage Reference
23
Section 23. Comparator Voltage Reference
HIGHLIGHTS
This section of the manual contains the following major topics:
23.1 Introduction .................................................................................................................. 23-2
23.2 Control Register ........................................................................................................... 23-3
23.3 Configuring the Voltage Reference .............................................................................. 23-4
23.4 Voltage Reference Accuracy/Error............................................................................... 23-5
23.5 Operation During SLEEP ............................................................................................. 23-5
23.6 Effects of a RESET ...................................................................................................... 23-5
23.7 Connection Considerations.......................................................................................... 23-6
23.8 Initialization .................................................................................................................. 23-7
23.9 Design Tips .................................................................................................................. 23-8
23.10 Related Application Notes............................................................................................ 23-9
23.11 Revision History ......................................................................................................... 23-10
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DS39523A-page 23-2 2000 Microchip Technology Inc.
23.1 Introduction
This Voltage Reference module is typically used in conjunction with the Comparator module. The
Comparator module’s inputs do not require very large drive, and therefore the drive capability of
this Voltage Reference is limited.
The Voltage Reference is a 16-tap resistor ladder network that provides a selectable Voltage Reference.
The resistor ladder is segmented to provide two ranges of VREF values and has a
power-down function to conserve power when the reference is not being used. The VRCON register
controls the operation of the reference (shown in Register 23-1). The block diagram is given
in Figure 23-1. Within each range, the 16 steps are monotonic (i.e., each increasing code will
result in an increasing output).
Figure 23-1: Voltage Reference Block Diagram
Table 23-1: Typical Voltage Reference with VDD = 5.0V
VR3:VR0
VREF
VRR = 1 VRR = 0
0000 0.00 V 1.25 V
0001 0.21 V 1.41 V
0010 0.42 V 1.56 V
0011 0.63 V 1.72 V
0100 0.83 V 1.88 V
0101 1.04 V 2.03 V
0110 1.25 V 2.19 V
0111 1.46 V 2.34 V
1000 1.67 V 2.50 V
1001 1.88 V 2.66 V
1010 2.08 V 2.81 V
1011 2.29 V 2.97 V
1100 2.50 V 3.13 V
1101 2.71 V 3.28 V
1110 2.92 V 3.44 V
1111 3.13 V 3.59 V
Note 1: See parameter D312 in the "Electrical Specifications" section of the device data sheet.
8R VRR (1)
VR3
VR0
16-1 Analog MUX (From VRCON<3:0>)
8R (1) R (1) R (1) R (1) R
VREN (1)
VREF
16 Stages
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2000 Microchip Technology Inc. DS39523A-page 23-3
Section 23. Comparator Voltage Reference
Comparator
Voltage Reference
23
23.2 Control Register
The Voltage Reference Control register (VRCON) is shown in Register 23-1.
Register 23-1: VRCON Register
R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
VREN VROEN VRR — VR3 VR2 VR1 VR0
bit 7 bit 0
bit 7 VREN: VREF Enable
1=VREF circuit powered on
0=VREF circuit powered down
bit 6 VROEN: VREF Output Enable
1=VREF is internally connected to Comparator module’s VREF. This voltage level is also
output on the VREF pin
0=VREF is not connected to the Comparator module. This voltage is disconnected from the
VREF pin
bit 5 VRR: VREF Range Selection
1 = 0V to 0.75 VDD, with VDD/24 step size
0 = 0.25 VDD to 0.75 VDD, with VDD/32 step size
bit 4 Unimplemented: Read as '0'
bit 3:0 VR3:VR0: VREF Value Selection 0 ≤ VR3:VR0 ≤ 15
When VRR = 1:
VREF = (VR<3:0> / 24) • VDD
When VRR = 0:
VREF = 1/4 * VDD + (VR3:VR0 / 32) • VDD
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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23.3 Configuring the Voltage Reference
The Voltage Reference can output 16 distinct voltage levels for each range.
The equations used to calculate the output of the Voltage Reference are as follows:
if VRR = 1: VREF = (VR3:VR0 / 24) x VDD
if VRR = 0: VREF = (VDD x 1/4) + (VR3:VR0 / 32) x VDD
The settling time of the Voltage Reference must be considered when changing the VREF output.
Example 23-1 shows an example of how to configure the Voltage Reference for an output voltage
of 1.25V with VDD = 5.0V.
Generally the VREF and VDD of the system will be known and you need to determine the value to
load into VR3:VR0. Equation 23-1 shows how to calculate the VR3:VR0 value. There will be
some error since VR3:VR0 can only be an integer, and the VREF and VDD levels must be chosen
so that the result is not greater then 15.
Equation 23-1: Calculating VR3:VR0
VREF
VDD VR3:VR0 = X 24
When VRR = 1
VREF - VDD/4
VDD VR3:VR0 = X 32
When VRR = 0
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2000 Microchip Technology Inc. DS39523A-page 23-5
Section 23. Comparator Voltage Reference
Comparator
Voltage Reference
23
23.4 Voltage Reference Accuracy/Error
The full range of VSS to VDD cannot be realized due to the construction of the module. The transistors
on the top and bottom of the resistor ladder network (Figure 23-1) keep VREF from
approaching VSS or VDD. The Voltage Reference is VDD derived and therefore, the VREF output
changes with fluctuations in VDD. The absolute accuracy of the Voltage Reference can be found
in the Electrical Specifications parameter D311.
23.5 Operation During SLEEP
When the device wakes up from SLEEP through an interrupt or a Watchdog Timer time-out, the
contents of the VRCON register are not affected. To minimize current consumption in SLEEP
mode, the Voltage Reference should be disabled.
23.6 Effects of a RESET
A device RESET disables the Voltage Reference by clearing the VREN bit (VRCON<7>). This
RESET also disconnects the reference from the VREF pin by clearing the VROEN bit
(VRCON<6>) and selects the high voltage range by clearing the VRR bit (VRCON<5>). The
VREF value select bits, VRCON<3:0>, are also cleared.
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DS39523A-page 23-6 2000 Microchip Technology Inc.
23.7 Connection Considerations
The Voltage Reference Module operates independently of the Comparator module. The output
of the reference generator may be connected to the VREF pin if the corresponding TRIS bit is set
and the VROEN bit (VRCON<6>) is set. Enabling the Voltage Reference output onto the VREF
pin with an input signal present will increase current consumption. Configuring the VREF as a digital
output with VREF enabled will also increase current consumption.
The VREF pin can be used as a simple D/A output with limited drive capability. Due to the limited
drive capability, a buffer must be used in conjunction with the Voltage Reference output for external
connections to VREF. Figure 23-2 shows an example buffering technique.
Figure 23-2: Voltage Reference Output Buffer Example
VREF Output +
– • •
VREF Module
R (1)
ANx
Note 1: R is the Voltage Reference Output Impedance and is dependent upon
the Voltage Reference Configuration (the VR3:VR0 bits and the VRR bit).
PIC18CXXX
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2000 Microchip Technology Inc. DS39523A-page 23-7
Section 23. Comparator Voltage Reference
Comparator
Voltage Reference
23
23.8 Initialization
Example 23-1 shows a program sequence to configure the Voltage Reference, comparator module,
and PORT pins.
Example 23-1: Voltage Reference Configuration
MOVLW 0x02 ; 4 Inputs Muxed to 2 comparators
MOVWF CMCON ;
MOVLW PORTxout ; Select PORTx pins
MOVWF TRISx ; to be output
MOVLW 0xA6 ; enable VREF
MOVWF VRCON ; low range set VR3:VR0 = 6
CALL DELAY10 ; 10 µs delay
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DS39523A-page 23-8 2000 Microchip Technology Inc.
23.9 Design Tips
Question 1: My VREF is not what I expect.
Answer 1:
Any variation of the device VDD will translate directly onto the VREF pin. Also ensure that you have
correctly calculated (specified) the VDD divider which generates the VREF.
Question 2: I am connecting VREF into a low impedance circuit, and the VREF is not at
the expected level.
Answer 2:
The Voltage Reference module is not intended to drive large loads. A buffer must be used
between the PICmicro’s VREF pin and the load.
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2000 Microchip Technology Inc. DS39523A-page 23-9
Section 23. Comparator Voltage Reference
Comparator
Voltage Reference
23
23.10 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced MCU family (that is they may be written
for the Base-Line, Mid-Range, or High-End families), but the concepts are pertinent, and
could be used (with modification and possible limitations). The current application notes related
to Voltage Reference are:
Title Application Note #
Resistance and Capacitance Meter using a PIC16C622 AN611
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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DS39523A-page 23-10 2000 Microchip Technology Inc.
23.11 Revision History
Revision A
This is the initial released revision of the Voltage Reference description.
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2000 Microchip Technology Inc. DS39525A-page 24-1
Comparator
24
Section 24. Comparator
HIGHLIGHTS
This section of the manual contains the following major topics:
24.1 Introduction .................................................................................................................. 24-2
24.2 Control Register ........................................................................................................... 24-3
24.3 Comparator Configuration............................................................................................ 24-4
24.4 Comparator Operation ................................................................................................. 24-6
24.5 Comparator Reference................................................................................................. 24-6
24.6 Comparator Response Time........................................................................................ 24-8
24.7 Comparator Outputs .................................................................................................... 24-8
24.8 Comparator Interrupts.................................................................................................. 24-9
24.9 Comparator Operation During SLEEP ......................................................................... 24-9
24.10 Effects of a RESET ...................................................................................................... 24-9
24.11 Analog Input Connection Considerations................................................................... 24-10
24.12 Initialization ................................................................................................................ 24-11
24.13 Design Tips ................................................................................................................ 24-12
24.14 Related Application Notes.......................................................................................... 24-13
24.15 Revision History ......................................................................................................... 24-14
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24.1 Introduction
The comparator module contains two analog comparators. The inputs to the comparators are
multiplexed with the I/O pins. The on-chip Voltage Reference (see the “Comparator Voltage
Reference” section) can also be an input to the comparators.
The CMCON register, shown in Register 24-1, controls the comparator input and output multiplexers.
A block diagram of the comparator is shown in Figure 24-1.
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Section 24. Comparator
Comparator
24
24.2 Control Register
The Comparator Control register (CMCON) is shown in Register 24-1.
Register 24-1: CMCON Register
R-0 R-0 R-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0
C2OUT C1OUT C2INV C1INV CIS CM2 CM1 CM0
bit 7 bit 0
bit 7 C2OUT: Comparator2 Output State bit
This bit indicates the output state of comparator 2.
1 = C2 VIN+ > C2 VIN–
0 = C2 VIN+ < C2 VIN–
bit 6 C1OUT: Comparator1 Output State bit
This bit indicates the output state of comparator 1.
1 = C1 VIN+ > C1 VIN–
0 = C1 VIN+ < C1 VIN–
bit 5 C2INV: Comparator2 Inverted Output State bit
1 = Invert the state of C2 output
0 = State of C2 output is not inverted
bit 4 C1INV: Comparator1 Inverted Output State bit
1 = Invert the state of C1 output
0 = State of C1 output is not inverted
bit 3 CIS: Comparator Input Switch bit
This bit selects which analog inputs are used as the input to the comparator.
When CM2:CM0: = 001:
1 = C1 VIN– connects to ANx3
0 = C1 VIN– connects to ANx0
When CM2:CM0 = 010:
1 = C1 VIN– connects to ANx3
C2 VIN– connects to ANx2
0 = C1 VIN– connects to ANx0
C2 VIN– connects to ANx1
bit 2:0 CM2:CM0: Comparator Mode Select bits
This bit selects the configuration of the two comparators with the comparator input pins and the
“Comparator Voltage Reference”.
See Figure 24-1 to select the CM2:CM0 state for the desired mode. The use of ANx0 through
ANx3 indicates that there are four analog inputs used with the comparator module. The actual
analog inputs connected to the comparator inputs will be device dependent.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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24.3 Comparator Configuration
There are eight modes of operation for the comparators. The CMCON register is used to select
the mode. Figure 24-1 shows the eight possible modes. The TRIS register controls the data
direction of the comparator I/O pins for each mode. If the comparator mode is changed, the comparator
output level may not be valid for the new mode for the delay specified in the electrical
specifications of the device.
Note: Comparator interrupts should be disabled during a comparator mode change,
otherwise a false interrupt may occur.
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Section 24. Comparator
Comparator
24
Figure 24-1: Comparator I/O Operating Modes
C1
VINVIN+
Off (Read as '0')
Comparators Reset (POR Default Value)
A
A
CM2:CM0 = 000
C2
VINVIN+
Off (Read as '0')
A
A
C1
VINVIN+
C1OUT
Two Independent Comparators
A
A
CM2:CM0 = 010
C2
VINVIN+
C2OUT
A
A
C1
VINVIN+
C1OUT
Two Common Reference Comparators
A
A
CM2:CM0 = 100
C2
VINVIN+
C2OUT
A
D
C1
VINVIN+
Off (Read as '0')
One Independent Comparator
D
D
CM2:CM0 = 001
C1
VINVIN+
C1OUT
A
A
C1
VINVIN+
Off (Read as '0')
Comparators Off
D
D
CM2:CM0 = 111
C2
VINVIN+
Off (Read as '0')
D
D
C1
VINVIN+
C1OUT
Four Inputs Multiplexed to Two Comparators
A
A
CM2:CM0 = 110
C2
VINVIN+
C2OUT
A
A
From VREF Module
CIS = 0
CIS = 1
CIS = 0
CIS = 1
C1
VINVIN+
C1OUT
Two Common Reference Comparators with Outputs
A
A
CM2:CM0 = 101
C2
VINVIN+
C2OUT
A
D
C2OUT
Three Inputs Multiplexed to Two Comparators
CM2:CM0 = 011
ANx0
ANx3
ANx1
ANx2
ANx0
ANx3
ANx1
ANx2
ANx0
ANx3
ANx1
ANx2
ANx0
ANx3
ANx1
ANx2
ANx0
ANx3
ANx1
ANx2
ANx0
ANx3
ANx1
ANx2
ANx0
ANx3
ANx1
ANx2
C1OUT
C1OUT
C1
VINVIN+
C1OUT
A
A
C2
VINVIN+
C2OUT
A
A
C2OUT
ANx0
ANx3
ANx1
ANx2
C1OUT
A = Analog Input, port reads as zeros always.
D = Digital Input.
CIS (CMCON<3>) is the Comparator Input Switch.
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24.4 Comparator Operation
A single comparator is shown in Figure 24-2 along with the relationship between the analog input
levels and the digital output. When the analog input at VIN+ is less than the analog input VIN–,
the output of the comparator is a digital low level. When the analog input at VIN+ is greater than
the analog input VIN–, the output of the comparator is a digital high level. The shaded areas of
the output of the comparator (shown in Figure 24-2) represent the uncertainty due to input offsets
and response time.
24.5 Comparator Reference
An external or internal reference signal may be used depending on the comparator operating
mode. The analog signal that is present at VIN– is compared to the signal at VIN+, and the digital
output of the comparator is adjusted accordingly (Figure 24-2).
Figure 24-2: Single Comparator
–
VIN+ +
VIN–
Output
VIN–
VIN+
utput
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Section 24. Comparator
Comparator
24
24.5.1 External Reference Signal
When external voltage references are used, the comparator module can be configured to have
the comparators operate from the same or different reference sources. The reference signal
must be between VSS and VDD, and can be applied to either pin of the comparator(s).
24.5.2 Internal Reference Signal
The comparator module also allows the selection of an internally generated voltage reference for
the comparators. The “Comparator Voltage Reference” section contains a detailed description
of the Voltage Reference Module that provides this signal. The internal reference signal is used
when the comparators are in mode CM2:CM0 = 110 (Figure 24-1). In this mode, the internal voltage
reference is applied to the VIN+ input of both comparators.
The internal voltage reference may be used in any comparator mode. The voltage reference is
output to the VREF pin. Any comparator input pin may be connected externally to the VREF pin.
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24.6 Comparator Response Time
Response time is the minimum time, after selecting a new reference voltage or input source,
before the comparator output is guaranteed to have a valid level. If the internal reference is
changed, the maximum settling time of the internal voltage reference must be considered when
using the comparator outputs. Otherwise the maximum response time of the comparators should
be used.
24.7 Comparator Outputs
The comparator outputs are read through the CMCON register. These bits are read only. The
comparator outputs may also be directly output to the I/O pins. When CM2:CM0 = 011, multiplexors
in the output path of the I/O pins will switch and the output of each pin will be the unsynchronized
output of the comparator. The uncertainty of each of the comparators is related to the
input offset voltage and the response time given in the specifications. Figure 24-3 shows the
comparator output block diagram.
The TRIS bits will still function as the output enable/disable for the I/O pins while in this mode.
Figure 24-3: Comparator Output Block Diagram
Note 1: When reading the Port register, all pins configured as analog inputs will read as a
‘0’. Pins configured as digital inputs will convert an analog input according to the
Schmitt Trigger input specification.
2: Analog levels on any pin that is defined as a digital input may cause the input buffer
to consume more current than is specified.
Q D
EN
To I/O pin
Bus
Data
RD CMCON
Set
MULTIPLEX
CMIF
bit
+ -
Q D
EN
CL
Port Pins
RD CMCON
RESET
From
Other
Comparator
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Section 24. Comparator
Comparator
24
24.8 Comparator Interrupts
The comparator interrupt flag is set whenever the comparators value changes relative to the last
value loaded into CMxOUT bits. Software will need to maintain information about the status of
the output bits, as read from CMCON<7:6>, to determine the actual change that has occurred.
The CMIF bit is the comparator interrupt flag. The CMIF bit must be cleared. Since it is also possible
to set this bit, a simulated interrupt may be initiated.
The CMIE bit, the PEIE/GIEL bit, and the GIE/GIEH bit must be set to enable the interrupt. If any
of these bits are clear, an interrupt from the comparator module will not occur, though the CMIF
bit will still be set if an interrupt condition occurs. Table 24-1 shows the state of the comparator
interrupt bits to enable an interrupt to vector to the interrupt vector address. If these conditions
are not met, the comparator module will set the CMIF bit, but the program execution will not go
to the interrupt vector address.
The user, in the interrupt service routine, can clear the interrupt in the following manner:
a) Any read or write of the CMCON register. This will load the CMCON register with the new
value with the CMxOUT bits.
b) Clear the CMIF flag bit.
An interrupt condition will continue to set the CMIF flag bit. Reading CMCON will end the interrupt
condition, and allow the CMIF flag bit to be cleared.
Table 24-1: How State of Interrupt Control Bits Determine Action After Comparator Trip
(CMIF is Set)
24.9 Comparator Operation During SLEEP
When a comparator is active and the device is placed in SLEEP mode, the comparator remains
active and the interrupt is functional if enabled. This interrupt will wake-up the device from SLEEP
mode when enabled. While the comparator is powered up, each comparator that is operational
will consume additional current as shown in the comparator specifications. To minimize power
consumption while in SLEEP mode, turn off the comparators (CM2:CM0 = 111), before entering
SLEEP. If the device wakes up from SLEEP, the contents of the CMCON register are not affected.
24.10 Effects of a RESET
A device RESET forces the CMCON register to its reset state. This forces the comparator module
to be in the comparator reset mode, CM2:CM0 = 000. This ensures that all potential inputs
are analog inputs. Device current is minimized when analog inputs are present at RESET time.
The comparators will be powered down disabled during the RESET interval.
GIE GIEH PEIE GIEL CMIE IPEN CMIP Comment
1 — 1 — 1 0 — CMIF set
Branch to ISR
x — x — 0 0 — CMIF set
x — 0 — x 0 — CMIF set
0 — x — x 0 — CMIF set
— x — 1 11 0 CMIF set
Branch to ISR
— 1 — x 11 1 CMIF set
Branch to ISR
— x — x 0 1 x CMIF set
— x — 0 x 1 0 CMIF set
— x 0 — x 1 1 CMIF set
— 0 x — x 1 1 CMIF set
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DS39525A-page 24-10 2000 Microchip Technology Inc.
24.11 Analog Input Connection Considerations
A simplified circuit for an analog input is shown in Figure 24-4. Since the analog pins are connected
to a digital output, they have reverse biased diodes to VDD and VSS. The analog input
therefore, must be between VSS and VDD. If the input voltage deviates from this range by more
than 0.6V in either direction, one of the diodes is forward biased and a latch-up may occur. A
maximum source impedance of 10 kΩ is recommended for the analog sources.
Figure 24-4: Analog Input Model
Table 24-2: Registers Associated with Comparator Module
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Value on
POR,
BOR
Value on
All Other
Resets
CMCON C2OUT C1OUT — — CIS CM2 CM1 CM0 00-- 0000 00-- 0000
VRCON VREN VROE VRR — VR3 VR2 VR1 VR0 000- 0000 000- 0000
INTCON GIE/GIEH PEIE/GIEL TMR0IE INT0IE RBIE TMR0IF INT0IF RBIF 0000 000x 0000 000x
PIR CMIF (1) 0 0
PIE CMIE (1) 0 0
IPE CMIP (1) 0 0
Legend: x = unknown, - = unimplemented locations read as '0'.
Shaded cells are not used for Comparator Module.
Note 1: The position of this bit is device dependent.
VAIN
RS
AIN
CPIN
5 pF
VDD
VT = 0.6V
VT = 0.6V
RC < 10k
ILEAKAGE
±500 nA
VSS
Legend
CPIN = Input Capacitance
VT = Threshold Voltage
ILEAKAGE = Leakage Current at the pin due to various junctions
RIC = Interconnect Resistance
RS = Source Impedance
VA = Analog Voltage
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2000 Microchip Technology Inc. DS39525A-page 24-11
Section 24. Comparator
Comparator
24
24.12 Initialization
The code in Example 24-1 depicts example steps required to configure the comparator module.
The Port registers (PORTx, LATx, and TRISx) need to be configured appropriately depending on
the mode selected. For CM2:CM0 = 100, the I/O multiplied with ANx0, ANx1, and ANx2 needs
to be configured for analog inputs. Other I/O may be digital.
Example 24-1: Initializing Comparator Module
FLAG_REG EQU 0x020
;
CLRF FLAG_REG ; Init flag register
CLRF PORTx ; Init the desired port
MOVF CMCON, W ;
ANDLW 0xC0 ; Mask comparator bits
IORWF FLAG_REG,F ; Store bits in flag register
MOVLW 0x04 ; Init comparator mode
MOVWF CMCON ; CM<2:0> = 100
MOVLW PORTxDIR ; Initialize data direction of the ANx0, ANx1,
MOVWF TRISx ; and ANx2. Set as inputs, other I/O
; on port as desired (either inputs or outputs)
CALL DELAY10 ; 10us delay
MOVF CMCON, F ; Read CMCON to end change condition
BCF PIR1,CMIF ; Clear pending interrupts
BSF PIE1,CMIE ; Enable comparator interrupts
BSF INTCON,PEIE ; Enable peripheral interrupts
BSF INTCON,GIE ; Global interrupt enable
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DS39525A-page 24-12 2000 Microchip Technology Inc.
24.13 Design Tips
Question 1: My program appears to lock up.
Answer 1:
You may be getting stuck in an infinite loop with the comparator interrupt service routine if you
did not follow the proper sequence to clear the CMIF flag bit. First, you must read the CMCON
register and then you can clear the CMIF flag bit.
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2000 Microchip Technology Inc. DS39525A-page 24-13
Section 24. Comparator
Comparator
24
24.14 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced MCU family (that is they may be written
for the Base-Line, Mid-Range, or High-End families), but the concepts are pertinent, and
could be used (with modification and possible limitations). The current application notes related
to the comparator module are:
Title Application Note #
Resistance and Capacitance Meter using a PIC16C622 AN611
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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DS39525A-page 24-14 2000 Microchip Technology Inc.
24.15 Revision History
Revision A
This is the initial released revision of the Comparator module description.
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2000 Microchip Technology Inc. DS39526A-page 25-1
Compatible 10-bit
A/D Converter
25
Section 25. Compatible 10-bit A/D Converter
HIGHLIGHTS
This section of the manual contains the following major topics:
25.1 Introduction .................................................................................................................. 25-2
25.2 Control Register ........................................................................................................... 25-4
25.3 Operation ..................................................................................................................... 25-7
25.4 A/D Acquisition Requirements ..................................................................................... 25-8
25.5 Selecting the A/D Conversion Clock .......................................................................... 25-10
25.6 Configuring Analog Port Pins..................................................................................... 25-11
25.7 A/D Conversions ........................................................................................................ 25-12
25.8 Operation During SLEEP ........................................................................................... 25-16
25.9 Effects of a RESET .................................................................................................... 25-16
25.10 A/D Accuracy/Error .................................................................................................... 25-17
25.11 Connection Considerations........................................................................................ 25-18
25.12 Transfer Function ....................................................................................................... 25-18
25.13 Initialization ................................................................................................................ 25-19
25.14 Design Tips ................................................................................................................ 25-20
25.15 Related Application Notes.......................................................................................... 25-21
25.16 Revision History ......................................................................................................... 25-22
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25.1 Introduction
The compatible analog-to-digital (A/D) converter module is software compatible with the Standard
10-bit A/D converter and can have up to sixteen analog inputs.
The analog input charges a sample and hold capacitor. The output of the sample and hold capacitor
is the input into the converter. The converter then generates a digital result of this analog level
via successive approximation. This A/D conversion of the analog input signal results in a corresponding
10-bit digital number.
The analog reference voltages (positive and negative supply) are software selectable to either
the device’s supply voltages (AVDD, AVss) or the voltage level on the AN3/VREF+ and AN2/VREFpins.
The A/D converter has the unique feature of being able to convert while the device is in SLEEP
mode.
The A/D module has four registers. These registers are:
• A/D Result High Register (ADRESH)
• A/D Result Low Register (ADRESL)
• A/D Control Register0 (ADCON0)
• A/D Control Register1 (ADCON1)
The ADCON0 register, shown in Register 25-1, controls the operation of the A/D module. The
ADCON1 register, shown in Register 25-2, configures the functions of the port pins. The port pins
can be configured as analog inputs (AN3 and AN2 can also be the voltage references) or as digital
I/O.
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2000 Microchip Technology Inc. DS39526A-page 25-3
Section 25. Compatible 10-bit A/D Converter
Compatible 10-bit
A/D Converter
25
Figure 25-1: Compatible 10-bit A/D Block Diagram
(Input voltage)
VAIN
VREF-
(Reference
voltage)
AVDD
PCFG0
CHS3:CHS0
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
0111
0110
0101
0100
0011
0010
0001
0000
A/D
Converter
AN11
AN10
AN9
AN8
1011
1010
1001
1000
VREF+
AVSS
AN12 1100
AN13 1101
AN14 1110
AN15 1111
Note: Not all 16 input channels may be implemented on every device. Unimplemented selections
are reserved and must not be selected.
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DS39526A-page 25-4 2000 Microchip Technology Inc.
25.2 Control Register
ADCON0 (Register 25-1) is used to select the clock and the analog channel. ADCON1
(Register 25-2) configures the port logic to either analog or digital inputs and the format of the
result.
Register 25-1: ADCON0 Register
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
ADCS1 ADCS0 CHS2 CHS1 CHS0 GO/DONE CHS3 ADON
bit 7 bit 0
bit 7-6: ADCS1:ADCS0: A/D Conversion Clock Select bits (shown in bold)
Three bits are required to select the A/D clock source. These bits are ADCS2:ADCS0.
000 = FOSC/2
001 = FOSC/8
010 = FOSC/32
011 = FRC (clock derived from the internal A/D RC oscillator)
100 = FOSC/4
101 = FOSC/16
110 = FOSC/64
111 = FRC (clock derived from the internal A/D RC oscillator)
Note: The ADCS2 bit is located in the ADCON1 register.
bit 5-3: CHS2:CHS0: Analog Channel Select bits
There are four bits that select the A/D channel. These are CHS3:CHS0.
0000 = channel 0, (AN0)
0001 = channel 1, (AN1)
0010 = channel 2, (AN2)
0011 = channel 3, (AN3)
0100 = channel 4, (AN4)
0101 = channel 5, (AN5)
0110 = channel 6, (AN6)
0111 = channel 7, (AN7)
1000 = channel 8, (AN8)
1001 = channel 8, (AN9)
1010 = channel 10, (AN10)
1011 = channel 11, (AN11)
1100 = channel 12, (AN12)
1101 = channel 13, (AN13)
1110 = channel 14, (AN14)
1111 = channel 15, (AN15)
Note: For devices that do not implement the full 16 A/D channels, the unimplemented
selections are reserved. Do not select any unimplemented channel.
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2000 Microchip Technology Inc. DS39526A-page 25-5
Section 25. Compatible 10-bit A/D Converter
Compatible 10-bit
A/D Converter
25
bit 2: GO/DONE: A/D Conversion Status bit
When ADON = 1
1 = A/D conversion in progress. Setting this bit starts an A/D conversion cycle.
This bit is automatically cleared by hardware when the A/D conversion is completed.
0 = A/D conversion not in progress
bit 1: CHS3: Analog Channel Select bit
The CHS2:CHS0 bits are located in positions bit 5 to bit 3. See the CHS2:CHS0 description for
operational details.
bit 0: ADON: A/D On bit
1 = A/D converter module is powered up
0 = A/D converter module is shut off and consumes no operating current
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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DS39526A-page 25-6 2000 Microchip Technology Inc.
Register 25-2: ADCON1 Register
R/W-0 R/W-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
ADFM ADCS2 — — PCFG3 PCFG2 PCFG1 PCFG0
bit 7 bit 0
bit 7: ADFM: A/D Result Format Select (also see Figure 25-6)
1 = Right justified. 6 Most Significant bits of ADRESH are read as ’0’.
0 = Left justified. 6 Least Significant bits of ADRESL are read as ’0’.
bit 6: ADCS2: A/D Conversion Clock Select bits (shown in bold)
Three bits are required to select the A/D clock source. These bits are ADCS2:ADCS0.
000 = FOSC/2
001 = FOSC/8
010 = FOSC/32
011 = FRC (clock derived from the internal A/D RC oscillator)
100 = FOSC/4
101 = FOSC/16
110 = FOSC/64
111 = FRC (clock derived from the internal A/D RC oscillator)
Note: The ADCS1:ADCS0 bits are located in the ADCON0 register.
bit 5-4: Unimplemented: Read as '0'
bit 3-0: PCFG3:PCFG0: A/D Port Configuration Control bits
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
A = Analog input D = Digital I/O
Ch/Ref = # of analog input channels / # of A/D voltage references
PCFG AN7 AN6 AN5 AN4 AN3 AN2 AN1 AN0 VREF+ VREF- CH/REF
0000 A A A A A A A A AVDD AVSS 8/0
0001 A A A AVREF+ A A A AN3 AVSS 7/1
0010 D D D A A A A A AVDD AVSS 5/0
0011 D D D AVREF+ A A A AN3 AVSS 4/1
0100 D D D D A D A A AVDD AVSS 3/0
0101 D D D DVREF+ D A A AN3 AVSS 2/1
011x DDDD D D DD — — 0/0
1000 A A A AVREF+ VREF- A A AN3 AN2 6 / 2
1001 D D A A A A A A AVDD AVSS 6/0
1010 D D A AVREF+ A A A AN3 AVSS 5/1
1011 D D A AVREF+ VREF- A A AN3 AN2 4 / 2
1100 D D D AVREF+ VREF- A A AN3 AN2 3 / 2
1101 D D D DVREF+ VREF- A A AN3 AN2 2 / 2
1110 D D D D D D D A AVDD AVSS 1/0
1111 D D D DVREF+ VREF- D A AN3 AN2 1 / 2
Note 1: On any device RESET, the port pins that are multiplexed with analog functions
(ANx) are forced to be an analog input.
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2000 Microchip Technology Inc. DS39526A-page 25-7
Section 25. Compatible 10-bit A/D Converter
Compatible 10-bit
A/D Converter
25
25.3 Operation
The ADRESH:ADRESL registers contain the 10-bit result of the A/D conversion. When the A/D
conversion is complete, the result is loaded into this A/D result register pair (ADRESH:ADRESL),
the GO/DONE bit (ADCON0) is cleared, and A/D interrupt flag bit, ADIF, is set. The block diagram
of the A/D module is shown in Figure 25-1.
After the A/D module has been configured, the signal on the selected channel must be acquired
before the conversion is started. The analog input channels must have their corresponding TRIS
bits selected as inputs. To determine acquisition time, see Subsection 25.4 “A/D Acquisition
Requirements.” After this acquisition time has elapsed, the A/D conversion can be started. The
following steps should be followed for doing an A/D conversion:
1. Configure the A/D module:
• Configure analog pins, voltage reference, and digital I/O (ADCON1)
• Select A/D input channel (ADCON0)
• Select A/D conversion clock (ADCON0)
• Turn on A/D module (ADCON0)
2. Configure A/D interrupt (if desired):
• Clear the ADIF bit
• Set the ADIE bit
• Set/Clear the ADIP bit
• Set the GIE/GIEH or PEIE/GIEL bit
3. Wait the required acquisition time.
4. Start conversion:
• Set the GO/DONE bit (ADCON0)
5. Wait for the A/D conversion to complete, by either:
• Polling for the GO/DONE bit to be cleared or the ADIF bit to be set, or
• Waiting for the A/D interrupt
6. Read A/D Result register pair (ADRESH:ADRESL): clear the ADIF bit, if required.
7. For next conversion, go to step 1 or step 2 as required.
Figure 25-2 shows the conversion sequence and the terms that are used. Acquisition time is the
time that the A/D module’s holding capacitor is connected to the external voltage level. When the
GO bit is set, the conversion time of 12 TAD is started. The sum of these two times is the sampling
time. There is a minimum acquisition time to ensure that the holding capacitor is charged to a
level that will give the desired accuracy for the A/D conversion.
Figure 25-2: A/D Conversion Sequence
Acquisition Time A/D Conversion Time
A/D Sample Time
When A/D holding capacitor starts to charge.
After A/D conversion, or when new A/D channel is selected.
When A/D conversion is started (setting the GO bit).
A/D conversion complete,
result is loaded in ADRES register.
Holding capacitor begins acquiring
voltage level on selected channel;
ADIF bit is set.
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DS39526A-page 25-8 2000 Microchip Technology Inc.
25.4 A/D Acquisition Requirements
For the A/D converter to meet its specified accuracy, the charge holding capacitor (CHOLD) must
be allowed to fully charge to the input channel voltage level. The analog input model is shown in
Figure 25-3. The source impedance (RS) and the internal sampling switch (RSS) impedance
directly affect the time required to charge the capacitor CHOLD. The sampling switch (RSS) impedance
varies over the device voltage (VDD), Figure 25-3. The source impedance affects the offset
voltage at the analog input (due to pin leakage current). The maximum recommended impedance
for analog sources is 2.5 kΩ. As the impedance is decreased, the acquisition time may
be decreased. After the analog input channel is selected (changed), this acquisition must pass
before the conversion can be started.
To calculate the minimum acquisition time, Equation 25-1 may be used. This equation assumes
that 1/2 LSb error is used (1024 steps for the A/D). The 1/2 LSb error is the maximum error
allowed for the A/D to meet its specified resolution.
Equation 25-1: Acquisition Time
Equation 25-2: A/D Minimum Charging Time
Example 25-1 shows the calculation of the minimum required acquisition time TACQ.
This calculation is based on the following application system assumptions.
CHOLD = 120 pF
RS = 2.5 kΩ
Conversion Error ≤ 1/2 LSb
VDD = 5V → RSS =7kΩ (see graph in Figure 25-3)
Temperature = 50°
C (system max.)
VHOLD = 0V @ time = 0
Example 25-1: Calculating the Minimum Required Acquisition Time (Case 1)
Note: When the conversion is started, the holding compacitor is disconnected from the
input pin.
TACQ equals Amplifier Settling Time (TAMP) plus
Holding Capacitor Charging Time (TC) plus
Temperature Coefficient (TCOFF)
TACQ = TAMP + TC + TCOFF
VHOLD = (VREF - (VREF/2048)) • (1 - e(-TC/CHOLD(RIC + RSS + RS)))
or
Tc = -(120 pF)(1 kΩ + RSS + RS) ln(1/2047)
TACQ = TAMP + TC + TCOFF
Temperature coefficient is only required for temperatures > 25°C.
TACQ = 2 µs + Tc + [(Temp - 25°C)(0.05 µs/°C)]
TC = -CHOLD (RIC + RSS + RS) ln(1/2047)
-120 pF (1 kΩ +7kΩ + 2.5 kΩ) ln(0.0004885)
-120 pF (10.5 kΩ) ln(0.0004885)
-1.26 µs (-7.6241)
9.61 µs
TACQ = 2 µs + 9.61µs + [(50°C - 25°C)(0.05 µs/°C)]
11.61 µs + 1.25 µs
12.86 µs
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2000 Microchip Technology Inc. DS39526A-page 25-9
Section 25. Compatible 10-bit A/D Converter
Compatible 10-bit
A/D Converter
25
Now to get an idea what happens to the acquisition time when the source impedance is a minimal
value (RS = 50 Ω). Example 25-2 shows the same conditions as in Example 25-1 with only the
source impedance changed to the minimal value.
Example 25-2: Calculating the Minimum Required Acquisition Time (Case 2)
Figure 25-3: Analog Input Model
TACQ = TAMP + TC + TCOFF
Temperature coefficient is only required for temperatures > 25°C.
TACQ = 2 µs + Tc + [(Temp - 25°C)(0.05 µs/°C)]
TC = -Chold (Ric + Rss + Rs) ln(1/2047)
-120 pF (1 kΩ +7kΩ + 50 Ω) ln(0.0004885)
-120 pF (8050 Ω) ln(0.0004885)
-0.966 µs (-7.6241)
7.36 µs
TACQ = 2 µs + 16.47 µs + [(50°C - 25°C)(0.05 µs/°C)]
9.36 µs + 1.25 µs
10.61 µs
Note 1: The reference voltage (VREF) has no effect on the equation, since it cancels itself
out.
2: The charge holding capacitor (Chold) is not discharged after each conversion.
3: The maximum recommended impedance for analog sources is 2.5 kΩ. This is
required to meet the pin leakage specification.
4: After a conversion has completed, a 2 TAD delay must complete before acquisition
can begin again. During this time the holding capacitor is not connected to the
selected A/D input channel.
VAIN Cpin
Rs ANx
5 pF
VDD
VT = 0.6V
VT = 0.6V I leakage
RIC ≤ 1k
Sampling
Switch
SS RSS
CHOLD = 120 pF
Vss
6V
Sampling Switch
5V
4V
3V
2V
5 6 7 8 9 10 11
( kΩ )
VDD
± 500 nA
Legend
CPIN
VT
ILEAKAGE
RIC
SS
CHOLD
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin due to
= Interconnect Resistance
= Sampling Switch
= Sample/Hold Capacitance (from DAC)
various junctions
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DS39526A-page 25-10 2000 Microchip Technology Inc.
25.5 Selecting the A/D Conversion Clock
The A/D conversion time per bit is defined as TAD. The A/D conversion requires 11.5TAD per
10-bit conversion. The source of the A/D conversion clock is software selectable. The seven possible
options for TAD are:
• 2TOSC
• 4TOSC
• 8TOSC
• 16TOSC
• 32TOSC
• 64TOSC
• Internal A/D RC oscillator
For correct A/D conversions, the A/D conversion clock (TAD) must be selected to ensure a minimum
TAD time of 1.6 µs as shown in Electrical Specifications parameter 130.
Table 25-1 and Table 25-2 show the resultant TAD times derived from the device operating frequencies
and the selected A/D clock source.
Table 25-1: TAD vs. Device Operating Frequencies (for Standard, C, Devices)
Table 25-2: TAD vs. Device Operating Frequencies (for Extended, LC, Devices)
AD Clock Source (TAD) Device Frequency
Operation ADCS2:ADCS0 20 MHz 5 MHz 1.25 MHz 333.33 kHz
2TOSC 000 100 ns (2) 400 ns (2) 1.6 µs 6 µs
4TOSC 100 200 ns (2) 800 ns (2) 3.2 µs 12 µs
8TOSC 001 400 ns (2) 1.6 µs 6.4 µs 24 µs (3)
16TOSC 101 800 ns (2) 3.2 µs 12.8 µs 48 µs (3)
32TOSC 010 1.6 µs 6.4 µs 25.6 µs (3) 96 µs (3)
64TOSC 110 3.2 µs 12.8 µs 51.2 µs (3) 192 µs (3)
RC 011 2-6 µs (1,4) 2-6 µs (1,4) 2-6 µs (1,4) 2-6 µs (1)
Legend: Shaded cells are outside of recommended range.
Note 1: The RC source has a typical TAD of 4 µs.
2: These values violate the minimum required TAD.
3: For faster conversion times, the selection of another clock source is recommended.
4: For device frequencies above 1 MHz, the device must be in SLEEP for the entire
conversion, or the A/D accuracy may be out of specification.
AD Clock Source (TAD) Device Frequency
Operation ADCS2:ADCS0 4 MHz 2 MHz 1.25 MHz 333.33 kHz
2TOSC 000 500 ns (2) 1.0 µs (2) 1.6 µs (2) 6 µs
4TOSC 100 1.0 µs (2) 2.0 µs (2) 3.2 µs (2) 12 µs
8TOSC 001 2.0 µs (2) 4.0 µs 6.4 µs 24 µs (3)
16TOSC 101 4.0 µs (2) 8.0 µs 12.8 µs 48 µs (3)
32TOSC 010 8.0 µs 16.0 µs 25.6 µs (3) 96 µs (3)
64TOSC 110 16.0 µs 32.0 µs 51.2 µs (3) 192 µs (3)
RC 011 3-9 µs (1,4) 3-9 µs (1,4) 3-9 µs (1,4) 3-9 µs (1)
Legend: Shaded cells are outside of recommended range.
Note 1: The RC source has a typical TAD of 6 µs.
2: These values violate the minimum required TAD.
3: For faster conversion times, the selection of another clock source is recommended.
4: For device frequencies above 1 MHz, the device must be in SLEEP for the entire
conversion, or the A/D accuracy may be out of specification.
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2000 Microchip Technology Inc. DS39526A-page 25-11
Section 25. Compatible 10-bit A/D Converter
Compatible 10-bit
A/D Converter
25
25.6 Configuring Analog Port Pins
The ADCON1 and TRIS registers control the operation of the A/D port pins. The port pins that
are desired as analog inputs must have their corresponding TRIS bits set (input). If the TRIS bit
is cleared (output), the digital output level (VOH or VOL) will be converted. After a device RESET,
pins that are multiplexed with analog inputs will be configured as an analog input. The corresponding
TRIS bit will be set.
The A/D operation is independent of the state of the CHS2:CHS0 bits and the TRIS bits.
Note 1: When reading the port register, any pin configured as an analog input channel will
read as cleared (a low level). Pins configured as digital inputs, will convert an analog
input. Analog levels on a digitally configured input will not affect the conversion
accuracy.
2: Analog levels on any pin that is defined as a digital input (including the AN7:AN0
pins), may cause the input buffer to consume current that is out of the devices specification.
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DS39526A-page 25-12 2000 Microchip Technology Inc.
25.7 A/D Conversions
Example 25-3 shows how to perform an A/D conversion. The port pins are configured as analog
inputs. The analog references (VREF+ and VREF-) are the device AVDD and AVSS. The A/D interrupt
is enabled, and the A/D conversion clock is FRC. The conversion is performed on the AN0
pin (channel 0). The result of the conversion is left justified.
Clearing the GO/DONE bit during a conversion will abort the current conversion. The A/D result
register pair will NOT be updated with the partially completed A/D conversion sample. That is,
the ADRESH:ADRESL registers will continue to contain the value of the last completed conversion
(or the last value written to the ADRESH:ADRESL registers). After the A/D conversion is
aborted, a 2TAD wait is required before the next acquisition is started. After this 2TAD wait, acquisition
on the selected channel is automatically started.
Example 25-3: A/D Conversion
Figure 25-4: A/D Conversion TAD Cycles
Note: The GO/DONE bit should NOT be set in the same instruction that turns on the A/D,
due to the required acquisition time.
CLRF ADCON1 ; Configure A/D inputs,
; result is left justified
BSF IPR1, ADIP ; High priority
BSF PIE1, ADIE ; Enable A/D interrupts
MOVLW 0xC1 ; RC Clock, A/D is on,
MOVWF ADCON0 ; Channel 0 is selected
BCF PIR1, ADIF ; Clear A/D interrupt flag bit
BSF INTCON, PEIE ; Enable peripheral interrupts
BSF INTCON, GIE ; Enable all interrupts
;
; Ensure that the required sampling time for the selected input
; channel has elapsed. Then the conversion may be started.
;
BSF ADCON0, GO ; Start A/D Conversion
: ; The ADIF bit will be set and the
: ; GO/DONE bit is cleared upon
: ; completion of the A/D Conversion.
TAD1 TAD2 TAD3 TAD4 TAD5 TAD6 TAD7 TAD8 TAD11
Set GO bit
Holding capacitor is disconnected from analog input (typically 100 ns)
holding capacitor is connected to analog input.
b9 b8 b7 b6 b5 b4 b3 b2
TAD9 TAD10
b1 b0
Tcy - TAD
GO bit is cleared,
Next Q4: ADRES is loaded,
ADIF bit is set,
Conversion Starts
b0
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Section 25. Compatible 10-bit A/D Converter
Compatible 10-bit
A/D Converter
25
Figure 25-5: Flowchart of A/D Operation
Acquire
ADON = 0
ADON = 0?
GO = 0?
A/D Clock
GO = 0,
ADIF = 0
Abort Conversion
SLEEP Power-down A/D Wait 2TAD
Wake-up
Yes
No
Yes
No
No
Yes
Finish Conversion
GO = 0,
ADIF = 1
No
Yes
Finish Conversion
GO = 0,
ADIF = 1
Wait 2TAD
Stay in SLEEP
Selected Channel
= RC?
SLEEP
No
Yes
Instruction?
Start of A/D Conversion Delayed
1 Instruction Cycle
From SLEEP?
Power-down A/D
Yes
No
Wait 2TAD
Finish Conversion
GO = 0,
ADIF = 1
SLEEP
Instruction?
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DS39526A-page 25-14 2000 Microchip Technology Inc.
25.7.1 Faster Conversion - Lower Resolution Trade-off
Not all applications require a result with 10-bits of resolution, but may instead require a faster
conversion time. The A/D module allows users to make the trade-off of conversion speed to resolution.
Regardless of the resolution required, the acquisition time is the same. To speed up the
conversion, the clock source of the A/D module may be switched so that the TAD time violates
the minimum specified time (see electrical specification parameter 130). Once the TAD time violates
the minimum specified time, all the following A/D result bits are not valid (see A/D Conversion
Timing in the Electrical Specifications section). The clock sources may only be switched
between the three oscillator versions (cannot be switched from/to RC). The equation to determine
the time before the oscillator can be switched is as follows:
Since the TAD is based from the device oscillator, the user must use some method (a timer, software
loop, etc.) to determine when the A/D oscillator may be changed. Example 25-4 shows a
comparison of time required for a conversion with 4-bits of resolution, versus the 10-bit resolution
conversion. The example is for devices operating at 20 MHz (the A/D clock is programmed for
32TOSC), and assumes that immediately after 6TAD, the A/D clock is programmed for 2TOSC.
The 2TOSC violates the minimum TAD time since the last 6 bits will not be converted to correct
values.
Example 25-4: 4-bit vs. 10-bit Conversion Times
Equation 25-3: Resolution/Speed Conversion Trade-off
Freq.
(MHz)(1)
Resolution
4-bit 10-bit
TAD 40 1.6 µs 1.6 µs
TOSC 40 25 ns 25 ns
TAD + N • TAD + (11 - N)(2TOSC) 40 8.5 µs 17.7 µs
Note 1: A minimum TAD time of 1.6 µs is required.
2: If the full 10-bit conversion is required, the A/D clock source should not be changed.
Conversion time = TAD + N • TAD + (11 - N)(2TOSC)
Where: N = number of bits of resolution required
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2000 Microchip Technology Inc. DS39526A-page 25-15
Section 25. Compatible 10-bit A/D Converter
Compatible 10-bit
A/D Converter
25
25.7.2 A/D Result Registers
The ADRESH:ADRESL register pair is the location where the 10-bit A/D result is loaded at the
completion of the A/D conversion. This register pair is 16-bits wide. The A/D module gives the
flexibility to left or right justify the 10-bit result in the 16-bit result register. The A/D Format Select
bit (ADFM) controls this justification. Figure 25-6 shows the operation of the A/D result justification.
The extra bits are loaded with ‘0’s’. When the A/D module is disabled these registers may
be used as two general purpose 8-bit registers.
Figure 25-6: A/D Result Justification
10-bit Result
ADRESH ADRESL
ADFM = 0
7 2107 0
10-bits
RESULT
ADRESH ADRESL
10-bits
7 0765 0
RESULT
ADFM = 1
Right Justified Left Justified
0000 00 0000 00
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DS39526A-page 25-16 2000 Microchip Technology Inc.
25.8 Operation During SLEEP
The A/D module can operate during SLEEP mode. This requires that the A/D clock source be set
to RC (ADCS2:ADCS0 = x11). When the RC clock source is selected, the A/D module waits one
instruction cycle before starting the conversion. This allows the SLEEP instruction to be executed,
which eliminates all internal digital switching noise from the conversion. When the conversion is
completed, the GO/DONE bit will be cleared and the result is loaded into the ADRESH:ADRESL
registers. If the A/D interrupt is enabled, the device will wake-up from SLEEP. If the A/D interrupt
is not enabled, the A/D module will be turned off, although the ADON bit will remain set.
When the A/D clock source is another clock option (not RC), a SLEEP instruction will cause the
present conversion to be aborted and the A/D module to be turned off (to conserve power),
though the ADON bit will remain set.
Turning off the A/D places the A/D module in its lowest current consumption state.
25.9 Effects of a RESET
A device RESET forces all registers to their RESET state. This forces the A/D module to be
turned off, and any conversion is aborted. All pins that are multiplexed with analog inputs will be
configured as an analog input. The corresponding TRIS bits will be set.
The value that is in the ADRESH:ADRESL registers is not initialized from a Power-on Reset. The
ADRESH:ADRESL registers will contain unknown data after a Power-on Reset.
Note: For the A/D module to operate in SLEEP, the A/D clock source must be set to RC
(ADCS2:ADCS0 = x11). To allow the conversion to occur during SLEEP, ensure the
SLEEP instruction immediately follows the instruction that sets the GO/DONE bit.
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2000 Microchip Technology Inc. DS39526A-page 25-17
Section 25. Compatible 10-bit A/D Converter
Compatible 10-bit
A/D Converter
25
25.10 A/D Accuracy/Error
In systems where the device frequency is low, use of the A/D RC clock is preferred. At moderate
to high frequencies, TAD should be derived from the device oscillator.
For a given range of analog inputs, the output digital code will be the same. This is due to the
quantization of the analog input to a digital code. Quantization error is typically ± 1/2 LSb and is
inherent in the analog to digital conversion process. The only way to reduce quantization error is
to increase the resolution of the A/D converter.
Offset error measures the first actual transition of a code versus the first ideal transition of a code.
Offset error shifts the entire transfer function. Offset error can be calibrated out of a system or
introduced into a system, through the interaction of the total leakage current and source impedance
at the analog input.
Gain error measures the maximum deviation of the last actual transition and the last ideal transition,
adjusted for offset error. This error appears as a change in slope of the transfer function.
The difference in gain error to full scale error, is that full scale does not take offset error into
account. Gain error can be calibrated out in software.
Linearity error refers to the uniformity of the code changes. Linearity errors cannot be calibrated
out of the system. Integral non-linearity error measures the actual code transition versus the ideal
code transition, adjusted by the gain error for each code.
Differential non-linearity measures the maximum actual code width versus the ideal code width.
This measure is unadjusted.
The maximum pin leakage current is specified in Electrical Specifications parameter D060.
TAD must not violate the minimum and should be minimized to reduce inaccuracies due to noise
and sampling capacitor bleed off.
In systems where the device will enter SLEEP mode after the start of the A/D conversion, the RC
clock source selection is required. In this mode, the digital noise from the modules in SLEEP are
stopped. This method gives high accuracy.
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DS39526A-page 25-18 2000 Microchip Technology Inc.
25.11 Connection Considerations
If the input voltage exceeds the rail values (VSS or VDD) by greater than 0.3V, then the accuracy
of the conversion is out of specification.
An external RC filter is sometimes added for anti-aliasing of the input signal. The R component
should be selected to ensure that the total source impedance is kept under the 2.5 kΩ recommended
specification. Any external components connected (via hi-impedance) to an analog
input pin (capacitor, zener diode, etc.) should have very little leakage current at the pin.
25.12 Transfer Function
The ideal transfer function of the A/D converter is as follows: the first transition occurs when the
analog input voltage (VAIN) is 1 LSb (or Analog VREF / 1024) (Figure 25-7).
Figure 25-7: A/D Transfer Function Digital code output
3FEh
003h
002h
001h
000h
0.5 LSb
1 LSb
1.5 LSb
2 LSb
2.5 LSb
1022 LSb
1022.5 LSb
3 LSb
Analog input voltage
3FFh
1023 LSb
1023.5 LSb
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2000 Microchip Technology Inc. DS39526A-page 25-19
Section 25. Compatible 10-bit A/D Converter
Compatible 10-bit
A/D Converter
25
25.13 Initialization
Example 25-5 shows an initialization of the A/D module.
Example 25-5: A/D Initialization
CLRF ADCON1 ; Configure A/D inputs
BSF PIE1, ADIE ; Enable A/D interrupts
BSF IPR1, ADIP ; High Priority
MOVLW 0xC1 ; RC Clock, A/D is on,
MOVWF ADCON0 ; Channel 0 is selected
MOVLW 0x4E ; Left Justified, AN0 is analog
MOVWF ADCON1 ; Vref comes from AVDD and AVSS
BCF PIR1, ADIF ; Clear A/D interrupt flag bit
BSF INTCON, PEIE ; Enable peripheral interrupts
BSF INTCON, GIE ; Enable all interrupts
;
; Ensure that the required sampling time for the selected input
; channel has elapsed. Then the conversion may be started.
;
BSF ADCON0, GO ; Start A/D Conversion
: ; The ADIF bit will be set and the
: ; GO/DONE bit is cleared upon
: ; completion of the A/D conversion.
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DS39526A-page 25-20 2000 Microchip Technology Inc.
25.14 Design Tips
Question 1: I find that the Analog to Digital Converter result is not always accurate.
What can I do to improve accuracy?
Answer 1:
1. Make sure you are meeting all of the timing specifications. If you are turning the module
off and on, there is a minimum delay you must wait before taking a sample. If you are
changing input channels, there is a minimum delay you must wait for this as well, and
finally there is TAD, which is the time selected for each bit conversion. This is selected in
ADCON0 and should be between 1.6 and 6 µs. If TAD is too short, the result may not be
fully converted before the conversion is terminated, and if TAD is made too long, the voltage
on the sampling capacitor can decay before the conversion is complete. These timing
specifications are provided in the “Electrical Specifications” section. See the device
data sheet for device specific information.
2. Often the source impedance of the analog signal is high (greater than 1 kOhms), so the
current drawn from the source to charge the sample capacitor can affect accuracy. If the
input signal does not change too quickly, try putting a 0.1 µF capacitor on the analog input.
This capacitor will charge to the analog voltage being sampled and supply the instantaneous
current needed to charge the 120 pF internal holding capacitor.
3. In systems where the device frequency is low, use of the A/D clock derived from the device
oscillator is preferred...this reduces, to a large extent, the effects of digital switching noise.
In systems where the device will enter SLEEP mode after start of A/D conversion, the RC
clock source selection is required.This method gives the highest accuracy.
Question 2: After starting an A/D conversion may I change the input channel (for my
next conversion)?
Answer 2:
After the holding capacitor is disconnected from the input channel, typically 100 ns after the GO
bit is set, the input channel may be changed.
Question 3: Do you know of a good reference on A/D’s?
Answer 3:
A good reference for understanding A/D conversions is the “Analog-Digital Conversion Handbook”
third edition, published by Prentice Hall (ISBN 0-13-03-2848-0).
Question 4: I migrated my code from a PIC18CXX8 device with 10-bit A/D to another
device with a 10-bit A/D (such as a PIC18CXX2) and the A/D does not seem
to operate the same. What’s going on?
Answer 4:
The 10-bit A/D on the PIC18CXX2 device is the compatible 10-bit A/D module. This module has
its ADCON bits in the same locations as the PICmicro’s Mid-Range 10-bit A/D module. The standard
PIC18CXXX 10-bit A/D module (as found on the PIC18CXX8 device) has optimized the bit
locations to ease configuration of the module.
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2000 Microchip Technology Inc. DS39526A-page 25-21
Section 25. Compatible 10-bit A/D Converter
Compatible 10-bit
A/D Converter
25
25.15 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is they may be written for
the Base-Line, the Mid-Range, or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to the
10-bit A/D module are:
Title Application Note #
Using the Analog to Digital Converter AN546
Four Channel Digital Voltmeter with Display and Keyboard AN557
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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DS39526A-page 25-22 2000 Microchip Technology Inc.
25.16 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Compatible 10-bit A/D module description.
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2000 Microchip Technology Inc. DS39527A-page 26-1
10-bit
A/D Converter
26
Section 26. 10-bit A/D Converter
HIGHLIGHTS
This section of the manual contains the following major topics:
26.1 Introduction .................................................................................................................. 26-2
26.2 Control Register ........................................................................................................... 26-4
26.3 Operation ..................................................................................................................... 26-7
26.4 A/D Acquisition Requirements ..................................................................................... 26-8
26.5 Selecting the A/D Conversion Clock .......................................................................... 26-10
26.6 Configuring Analog Port Pins..................................................................................... 26-11
26.7 A/D Conversions ........................................................................................................ 26-12
26.8 Operation During SLEEP ........................................................................................... 26-16
26.9 Effects of a RESET .................................................................................................... 26-16
26.10 A/D Accuracy/Error .................................................................................................... 26-17
26.11 Connection Considerations........................................................................................ 26-18
26.12 Transfer Function ....................................................................................................... 26-18
26.13 Initialization ................................................................................................................ 26-19
26.14 Design Tips ................................................................................................................ 26-20
26.15 Related Application Notes.......................................................................................... 26-21
26.16 Revision History ......................................................................................................... 26-22
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DS39527A-page 26-2 2000 Microchip Technology Inc.
26.1 Introduction
The 10-bit Analog-to-Digital (A/D) Converter module can have up to sixteen analog inputs.
The analog input charges a sample and hold capacitor. The output of the sample and hold capacitor
is the input into the converter. The converter then generates a digital result of this analog level
via successive approximation. This A/D conversion of the analog input signal results in a corresponding
10-bit digital number.
The analog reference voltages (positive and negative supply) are software selectable to either
the device’s supply voltages (AVDD, AVss) or the voltage level on the AN3/VREF+ and AN2/VREFpins.
The A/D converter has the unique feature of being able to convert while the device is in SLEEP
mode.
The A/D module has five registers. These registers are:
• A/D Result High Register (ADRESH)
• A/D Result Low Register (ADRESL)
• A/D Control Register0 (ADCON0)
• A/D Control Register1 (ADCON1)
• A/D Control Register2 (ADCON2)
The ADCON0 register, shown in Register 26-1, selects the input channel of the A/D module. The
ADCON1 register, shown in Register 26-2, configures the functions of the port pins and the Voltage
Reference for the A/D module. The port pins can be configured as analog inputs (AN3 and
AN2 can also be the Voltage References) or as digital I/O. ADCON2 selects the A/D conversion
clock source and the format of the A/D result.
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Section 26. 10-bit A/D Converter
10-bit
A/D Converter
26
Figure 26-1: 10-bit A/D Block Diagram
(Input voltage)
VAIN
VREF-
(Reference
Voltage)
AVDD
PCFG0
CHS3:CHS0
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
0111
0110
0101
0100
0011
0010
0001
0000
A/D
Converter
AN11
AN10
AN9
AN8
1011
1010
1001
1000
VREF+
AVSS
AN12 1100
AN13 1101
AN14 1110
AN15 1111
Note: Not all 16 input channels may be implemented on every device. Unimplemented selections
are reserved and must not be selected.
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DS39527A-page 26-4 2000 Microchip Technology Inc.
26.2 Control Register
ADCON0 (Register 26-1) is used to select the analog channel. ADCON1 (Register 26-2) configures
the port logic to either analog or digital inputs and the voltage reference source for the A/D.
ADCON2 (Register 26-3) selects the source of the A/D clock and the justification of the result.
Register 26-1: ADCON0 Register
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — CHS3 CHS2 CHS1 CHS0 GO/DONE ADON
bit 7 bit 0
bit 7-6: Unimplemented: Read as ’0’
bit 5-2: CHS3:CHS0: Analog Channel Select bits
0000 = channel 0, (AN0)
0001 = channel 1, (AN1)
0010 = channel 2, (AN2)
0011 = channel 3, (AN3)
0100 = channel 4, (AN4)
0101 = channel 5, (AN5)
0110 = channel 6, (AN6)
0111 = channel 7, (AN7)
1000 = channel 8, (AN8)
1001 = channel 8, (AN9)
1010 = channel 10, (AN10)
1011 = channel 11, (AN11)
1100 = channel 12, (AN12)
1101 = channel 13, (AN13)
1110 = channel 14, (AN14)
1111 = channel 15, (AN15)
bit 1: GO/DONE: A/D Conversion Status bit
1 = A/D conversion in progress. Setting this bit starts an A/D conversion cycle.
This bit is automatically cleared by hardware when the A/D conversion is completed.
0 = A/D conversion not in progress
bit 0: ADON: A/D On bit
1 = A/D converter module is operating
0 = A/D converter module is shut off and consumes no operating current
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 26. 10-bit A/D Converter
10-bit
A/D Converter
26
Register 26-2: ADCON1 Register
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — VCFG1 VCFG0 PCFG3 PCFG2 PCFG1 PCFG0
bit 7 bit 0
bit 7-6: Unimplemented: Read as ’0’
bit 5-4: VCFG1:VCFG0: Voltage Reference Configuration bits
bit 3-0: PCFG3:PCFG0: A/D Port Configuration Control bits (1)
A = Analog input D = Digital I/O
Note 1: Selection of an unimplemented channel produces a result of 0xFFF.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
A/D VREFH A/D VREFL
00 AVDD AVSS
01 External VREF+ AVSS
10 AVDD External VREF11
External VREF+ External VREFAN15
AN14 AN13 AN12 AN11 AN10 AN9 AN8 AN7 AN6 AN5 AN4 AN3 AN2 AN1 AN0
0000 AAAAAAAAAAAAAAAA
0001 DDAAAAAAAAAAAAAA
0010 DDDAAAAAAAAAAAAA
0011 DDDDAAAAAAAAAAAA
0100 DDDDDAAAAAAAAAAA
0101 DDDDDDAAAAAAAAAA
0110 DDDDDDDAAAAAAAAA
0111 DDDDDDDDAAAAAAAA
1000 DDDDDDDDDAAAAAAA
1001 DDDDDDDDDDAAAAAA
1010 DDDDDDDDDDDAAAAA
1011 DDDDDDDDDDDDAAAA
1100 DDDDDDDDDDDDDAAA
1101 DDDDDDDDDDDDDDAA
1110 DDDDDDDDDDDDDDDA
1111 DDDDDDDDDDDDDDDD
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DS39527A-page 26-6 2000 Microchip Technology Inc.
Register 26-3: ADCON2 Register
R/W-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0
ADFM — — — — ADCS2 ADCS1 ADCS0
bit 7 bit 0
bit 7: ADFM: A/D Result Format Select bit
1 = Right justified
0 = Left justified
bit 6-3: Unimplemented: Read as ’0’
bit 2-0: ADCS2:ADCS0: A/D Conversion Clock Select bits
000 = FOSC/2
001 = FOSC/8
010 = FOSC/32
011 = FRC (clock derived from an internal RC oscillator, 1 MHz maximum frequency)
100 = FOSC/4
101 = FOSC/16
110 = FOSC/64
111 = FRC (clock derived from an RC oscillator, 1 MHz maximum frequency)
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 26. 10-bit A/D Converter
10-bit
A/D Converter
26
26.3 Operation
The ADRESH:ADRESL registers contain the 10-bit result of the A/D conversion. When the A/D
conversion is complete, the result is loaded into this A/D result register pair (ADRESH:ADRESL),
the GO/DONE bit (ADCON0 register) is cleared, and A/D interrupt flag bit, ADIF, is set. The block
diagram of the A/D module is shown in Figure 26-1.
After the A/D module has been configured, the signal on the selected channel must be acquired
before the conversion is started. The analog input channels must have their corresponding TRIS
bits selected as inputs. To determine acquisition time, see Subsection 26.4 “A/D Acquisition
Requirements.” After this acquisition time has elapsed, the A/D conversion can be started. The
following steps should be followed for doing an A/D conversion:
1. Configure the A/D module:
• Configure analog pins, Voltage Reference, and digital I/O (ADCON1)
• Select A/D input channel (ADCON0)
• Select A/D conversion clock (ADCON0)
• Turn on A/D module (ADCON0)
2. Configure A/D interrupt (if desired):
• Clear the ADIF bit
• Set the ADIE bit
• Set/Clear the ADIP bit
• Set the GIE/GIEH or PEIE/GIEL bit
3. Wait the required acquisition time.
4. Start conversion:
• Set the GO/DONE bit (ADCON0)
5. Wait for the A/D conversion to complete, by either:
• Polling for the GO/DONE bit to be cleared or the ADIF bit to be set, or
• Waiting for the A/D interrupt
6. Read A/D Result register pair (ADRESH:ADRESL): clear the ADIF bit, if required.
7. For next conversion, go to step 1 or step 2 as required.
Figure 26-2 shows the conversion sequence, and the terms that are used. Acquisition time is the
time that the A/D module’s holding capacitor is connected to the external voltage level. When the
GO bit is set, the conversion time of 12 TAD is started. The sum of these two times is the sampling
time. There is a minimum acquisition time to ensure that the holding capacitor is charged to a
level that will give the desired accuracy for the A/D conversion.
Figure 26-2: A/D Conversion Sequence
Acquisition Time A/D Conversion Time
A/D Sample Time
When A/D holding capacitor starts to charge.
After A/D conversion, or when new A/D channel is selected.
When A/D conversion is started (setting the GO bit).
A/D conversion complete,
result is loaded in ADRES register.
Holding capacitor begins acquiring
voltage level on selected channel;
ADIF bit is set.
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DS39527A-page 26-8 2000 Microchip Technology Inc.
26.4 A/D Acquisition Requirements
For the A/D converter to meet its specified accuracy, the charge holding capacitor (CHOLD) must
be allowed to fully charge to the input channel voltage level. The analog input model is shown in
Figure 26-3. The source impedance (RS) and the internal sampling switch (RSS) impedance
directly affect the time required to charge the capacitor CHOLD. The sampling switch (RSS) impedance
varies over the device voltage (VDD), Figure 26-3. The source impedance affects the offset
voltage at the analog input (due to pin leakage current). The maximum recommended impedance
for analog sources is 2.5 kΩ. As the impedance is decreased, the acquisition time may
be decreased. After the analog input channel is selected (changed), this acquisition must pass
before the conversion can be started.
To calculate the minimum acquisition time, Equation 26-1 may be used. This equation assumes
that 1/2 LSb error is used (1024 steps for the A/D). The 1/2 LSb error is the maximum error
allowed for the A/D to meet its specified resolution.
Equation 26-1: Acquisition Time
Equation 26-2: A/D Minimum Charging Time
Example 26-1 shows the calculation of the minimum required acquisition time TACQ.
This calculation is based on the following application system assumptions.
CHOLD = 120 pF
RS = 2.5 kΩ
Conversion Error ≤ 1/2 LSb
VDD = 5V → RSS =7kΩ (see graph in Figure 26-3)
Temperature = 50°
C (system max.)
VHOLD = 0V @ time = 0
Example 26-1: Calculating the Minimum Required Acquisition Time (Case 1)
Note: When the conversion is started, the holding capacitor is disconnected from the input
pin.
TACQ equals Amplifier Settling Time (TAMP) plus
Holding Capacitor Charging Time (TC) plus
Temperature Coefficient (TCOFF)
TACQ = TAMP + TC + TCOFF
VHOLD = (VREF - (VREF/2048)) • (1 - e(-TC/CHOLD(RIC + RSS + RS)))
or
Tc = -(120 pF)(1 kΩ + RSS + RS) ln(1/2047)
TACQ = TAMP + TC + TCOFF
Temperature coefficient is only required for temperatures > 25°C.
TACQ = 2 µs + Tc + [(Temp - 25°C)(0.05 µs/°C)]
TC = -CHOLD (RIC + RSS + RS) ln(1/2047)
-120 pF (1 kΩ +7kΩ + 2.5 kΩ) ln(0.0004885)
-120 pF (10.5 kΩ) ln(0.0004885)
-1.26 µs (-7.6241)
9.61 µs
TACQ = 2 µs + 9.61µs + [(50°C - 25°C)(0.05 µs/°C)]
11.61 µs + 1.25 µs
12.86 µs
39500 18C Reference Manual.book Page 8 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39527A-page 26-9
Section 26. 10-bit A/D Converter
10-bit
A/D Converter
26
Now to get an idea what happens to the acquisition time when the source impedance is a minimal
value (RS = 50 Ω). Example 26-2 shows the same conditions as in Example 26-1 with only the
source impedance changed to the minimal value.
Example 26-2: Calculating the Minimum Required Acquisition Time (Case 2)
Figure 26-3: Analog Input Model
TACQ = TAMP + TC + TCOFF
Temperature coefficient is only required for temperatures > 25°C.
TACQ = 2 µs + Tc + [(Temp - 25°C)(0.05 µs/°C)]
TC = -Chold (Ric + Rss + Rs) ln(1/2047)
-120 pF (1 kΩ +7kΩ + 50 Ω) ln(0.0004885)
-120 pF (8050 Ω) ln(0.0004885)
-0.966 µs (-7.6241)
7.36 µs
TACQ = 2 µs + 16.47 µs + [(50°C - 25°C)(0.05 µs/°C)]
9.36 µs + 1.25 µs
10.61 µs
Note 1: The reference voltage (VREF) has no effect on the equation, since it cancels itself
out.
2: The charge holding capacitor (CHOLD) is not discharged after each conversion.
3: The maximum recommended impedance for analog sources is 2.5 kΩ. This is
required to meet the pin leakage specification.
4: After a conversion has completed, a 2 TAD delay must complete before acquisition
can begin again. During this time the holding capacitor is not connected to the
selected A/D input channel.
VAIN Cpin
Rs ANx
5 pF
VDD
VT = 0.6V
VT = 0.6V I leakage
RIC ≤ 1k
Sampling
Switch
SS RSS
CHOLD = 120 pF
Vss
6V
Sampling Switch
5V
4V
3V
2V
5 6 7 8 9 10 11
( kΩ )
VDD
± 500 nA
Legend
CPIN
VT
ILEAKAGE
RIC
SS
CHOLD
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin due to
= Interconnect Resistance
= Sampling Switch
= Sample/hold capacitance (from DAC)
various junctions
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PIC18C Reference Manual
DS39527A-page 26-10 2000 Microchip Technology Inc.
26.5 Selecting the A/D Conversion Clock
The A/D conversion time per bit is defined as TAD. The A/D conversion requires 11.5TAD per
10-bit conversion. The source of the A/D conversion clock is software selectable. The seven possible
options for TAD are:
• 2TOSC
• 4TOSC
• 8TOSC
• 16TOSC
• 32TOSC
• 64TOSC
• Internal A/D RC oscillator
For correct A/D conversions, the A/D conversion clock (TAD) must be selected to ensure a minimum
TAD time of 1.6 µs as shown in Electrical Specifications parameter 130.
Table 26-1 and Table 26-2 show the resultant TAD times derived from the device operating frequencies
and the selected A/D clock source.
Table 26-1: TAD vs. Device Operating Frequencies (for Standard, C, Devices)
Table 26-2: TAD vs. Device Operating Frequencies (for Extended, LC, Devices)
AD Clock Source (TAD) Device Frequency
Operation ADCS2:ADCS0 20 MHz 5 MHz 1.25 MHz 333.33 kHz
2TOSC 000 100 ns (2) 400 ns (2) 1.6 µs 6 µs
4TOSC 100 200 ns (2) 800 ns (2) 3.2 µs 12 µs
8TOSC 001 400 ns (2) 1.6 µs 6.4 µs 24 µs (3)
16TOSC 101 800 ns (2) 3.2 µs 12.8 µs 48 µs (3)
32TOSC 010 1.6 µs 6.4 µs 25.6 µs (3) 96 µs (3)
64TOSC 110 3.2 µs 12.8 µs 51.2 µs (3) 192 µs (3)
RC 011 2-6 µs (1,4) 2-6 µs (1,4) 2-6 µs (1,4) 2-6 µs (1)
Legend: Shaded cells are outside of recommended range.
Note 1: The RC source has a typical TAD of 4 µs.
2: These values violate the minimum required TAD.
3: For faster conversion times, the selection of another clock source is recommended.
4: For device frequencies above 1 MHz, the device must be in SLEEP for the entire
conversion, or the A/D accuracy may be out of specification.
AD Clock Source (TAD) Device Frequency
Operation ADCS2:ADCS0 4 MHz 2 MHz 1.25 MHz 333.33 kHz
2TOSC 000 500 ns (2) 1.0 µs (2) 1.6 µs (2) 6 µs
4TOSC 100 1.0 µs (2) 2.0 µs (2) 3.2 µs (2) 12 µs
8TOSC 001 2.0 µs (2) 4.0 µs 6.4 µs 24 µs (3)
16TOSC 101 4.0 µs 8.0 µs 12.8 µs 48 µs (3)
32TOSC 010 8.0 µs 16.0 µs 25.6 µs (3) 96 µs (3)
64TOSC 110 16.0 µs 32.0 µs 51.2 µs (3) 192 µs (3)
RC 011 3-9 µs (1,4) 3-9 µs (1,4) 3-9 µs (1,4) 3-9 µs (1)
Legend: Shaded cells are outside of recommended range.
Note 1: The RC source has a typical TAD of 6 µs.
2: These values violate the minimum required TAD.
3: For faster conversion times, the selection of another clock source is recommended.
4: For device frequencies above 1 MHz, the device must be in SLEEP for the entire
conversion, or the A/D accuracy may be out of specification.
39500 18C Reference Manual.book Page 10 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39527A-page 26-11
Section 26. 10-bit A/D Converter
10-bit
A/D Converter
26
26.6 Configuring Analog Port Pins
The ADCON1 and TRIS registers control the operation of the A/D port pins. The port pins that
are desired as analog inputs must have their corresponding TRIS bits set (input). If the TRIS bit
is cleared (output), the digital output level (VOH or VOL) will be converted. After a device RESET,
pins that are multiplexed with analog inputs will be configured as an analog input. The corresponding
TRIS bit will be set.
The A/D operation is independent of the state of the CHS2:CHS0 bits and the TRIS bits.
Note 1: When reading the port register, any pin configured as an analog input channel will
read as cleared (a low level). Pins configured as digital inputs, will convert an analog
input. Analog levels on a digitally configured input will not affect the conversion
accuracy.
2: Analog levels on any pin that is defined as a digital input (including the AN7:AN0
pins), may cause the input buffer to consume current that is out of the devices specification.
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PIC18C Reference Manual
DS39527A-page 26-12 2000 Microchip Technology Inc.
26.7 A/D Conversions
Example 26-3 shows how to perform an A/D conversion. The port pins are configured as analog
inputs. The analog references (VREF+ and VREF-) are the device AVDD and AVSS. The A/D interrupt
is enabled, and the A/D conversion clock is FRC. The conversion is performed on the AN0
pin (channel 0). The result of the conversion is left justified.
Clearing the GO/DONE bit during a conversion will abort the current conversion. The A/D result
register pair will NOT be updated with the partially completed A/D conversion sample. That is,
the ADRESH:ADRESL registers will continue to contain the value of the last completed conversion
(or the last value written to the ADRESH:ADRESL registers). After the A/D conversion is
aborted, a 2TAD wait is required before the next acquisition is started. After this 2TAD wait, acquisition
on the selected channel is automatically started.
Example 26-3: A/D Conversion
Figure 26-4: A/D Conversion TAD Cycles
Note: The GO/DONE bit should NOT be set in the instruction that turns on the A/D, due
to the required acquisition time.
CLRF ADCON1 ; Configure A/D inputs,
; result is left justified
BSF IPR1, ADIP ; High Priority.
BSF PIE1, ADIE ; Enable A/D interrupts
MOVLW 0xC1 ; RC Clock, A/D is on,
MOVWF ADCON0 ; Channel 0 is selected
BCF PIR1, ADIF ; Clear A/D interrupt flag bit
BSF INTCON, PEIE ; Enable peripheral interrupts
BSF INTCON, GIE ; Enable all interrupts
;
; Ensure that the required sampling time for the selected input
; channel has elapsed. Then the conversion may be started.
;
BSF ADCON0, GO ; Start A/D Conversion
: ; The ADIF bit will be set and the
: ; GO/DONE bit is cleared upon
: ; completion of the A/D Conversion.
TAD1 TAD2 TAD3 TAD4 TAD5 TAD6 TAD7 TAD8 TAD11
Set GO bit
Holding capacitor is disconnected from analog input (typically 100 ns)
holding capacitor is connected to analog input.
b9 b8 b7 b6 b5 b4 b3 b2
TAD9 TAD10
b1 b0
Tcy - TAD
GO bit is cleared,
Next Q4: ADRES is loaded,
ADIF bit is set,
Conversion Starts
b0
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2000 Microchip Technology Inc. DS39527A-page 26-13
Section 26. 10-bit A/D Converter
10-bit
A/D Converter
26
Figure 26-5: Flowchart of A/D Operation
Acquire
ADON = 0
ADON = 0?
GO = 0?
A/D Clock
GO = 0,
ADIF = 0
Abort Conversion
SLEEP Power-down A/D Wait 2TAD
Wake-up
Yes
No
Yes
No
No
Yes
Finish Conversion
GO = 0,
ADIF = 1
No
Yes
Finish Conversion
GO = 0,
ADIF = 1
Wait 2TAD
Stay in SLEEP
Selected Channel
= RC?
SLEEP
No
Yes
Instruction?
Start of A/D Conversion Delayed
1 Instruction Cycle
From SLEEP?
Power-down A/D
Yes
No
Wait 2TAD
Finish Conversion
GO = 0,
ADIF = 1
SLEEP
Instruction?
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PIC18C Reference Manual
DS39527A-page 26-14 2000 Microchip Technology Inc.
26.7.1 Faster Conversion - Lower Resolution Trade-off
Not all applications require a result with 10-bits of resolution, but may instead require a faster
conversion time. The A/D module allows users to make the trade-off of conversion speed to resolution.
Regardless of the resolution required, the acquisition time is the same. To speed up the
conversion, the clock source of the A/D module may be switched so that the TAD time violates
the minimum specified time (Electrical Specifications parameter 130). Once the TAD time violates
the minimum specified time, all the following A/D result bits are not valid (see A/D Conversion
Timing in the Electrical Specifications section). The clock sources may only be switched between
the three oscillator versions (cannot be switched from/to RC). The equation to determine the time
before the oscillator can be switched is as follows:
Since the TAD is based from the device oscillator, the user must use some method (a timer, software
loop, etc.) to determine when the A/D oscillator may be changed. Example 26-4 shows a
comparison of time required for a conversion with 4-bits of resolution, versus the 10-bit resolution
conversion. The example is for devices operating at 20 MHz (the A/D clock is programmed for
32TOSC), and assumes that immediately after 6TAD, the A/D clock is programmed for 2TOSC.
The 2TOSC violates the minimum TAD time since the last 6 bits will not be converted to correct
values.
Example 26-4: 4-bit vs. 10-bit Conversion Times
Equation 26-3: Resolution/Speed Conversion Trade-off
Freq.
(MHz)(1)
Resolution
4-bit 10-bit
TAD 40 1.6 µs 1.6 µs
TOSC 40 25 ns 25 ns
TAD + N • TAD + (11 - N)(2TOSC) 40 8.5 µs 17.7 µs
Note 1: A minimum TAD time of 1.6 µs is required.
2: If the full 10-bit conversion is required, the A/D clock source should not be changed.
Conversion time = TAD + N • TAD + (11 - N)(2TOSC)
Where: N = number of bits of resolution required
39500 18C Reference Manual.book Page 14 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39527A-page 26-15
Section 26. 10-bit A/D Converter
10-bit
A/D Converter
26
26.7.2 A/D Result Registers
The ADRESH:ADRESL register pair is the location where the 10-bit A/D result is loaded at the
completion of the A/D conversion. This register pair is 16-bits wide. The A/D module gives the
flexibility to left or right justify the 10-bit result in the 16-bit result register. The A/D Format Select
bit (ADFM) controls this justification. Figure 26-6 shows the operation of the A/D result justification.
The extra bits are loaded with ‘0’s’. When the A/D module is disabled, these registers may
be used as two general purpose 8-bit registers.
Figure 26-6: A/D Result Justification
10-bit Result
ADRESH ADRESL
ADFM = 0
7 2107 0
10-bits
RESULT
ADRESH ADRESL
10-bits
7 0765 0
RESULT
ADFM = 1
Right Justified Left Justified
0000 00 0000 00
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PIC18C Reference Manual
DS39527A-page 26-16 2000 Microchip Technology Inc.
26.8 Operation During SLEEP
The A/D module can operate during SLEEP mode. This requires that the A/D clock source be set
to RC (ADCS2:ADCS0 = x11). When the RC clock source is selected, the A/D module waits one
instruction cycle before starting the conversion. This allows the SLEEP instruction to be executed,
which eliminates all internal digital switching noise from the conversion. When the conversion is
completed, the GO/DONE bit will be cleared and the result is loaded into the ADRESH:ADRESL
registers. If the A/D interrupt is enabled, the device will wake-up from SLEEP. If the A/D interrupt
is not enabled, the A/D module will be turned off, although the ADON bit will remain set.
When the A/D clock source is another clock option (not RC), a SLEEP instruction will cause the
present conversion to be aborted and the A/D module to be turned off (to conserve power),
though the ADON bit will remain set.
Turning off the A/D places the A/D module in its lowest current consumption state.
26.9 Effects of a RESET
A device RESET forces all registers to their RESET state. This forces the A/D module to be
turned off, and any conversion is aborted. All pins that are multiplexed with analog inputs will be
configured as an analog input. The corresponding TRIS bits will be set.
The value that is in the ADRESH:ADRESL registers is not initialized from a Power-on Reset. The
ADRESH:ADRESL registers will contain unknown data after a Power-on Reset.
Note: For the A/D module to operate in SLEEP, the A/D clock source must be set to RC
(ADCS2:ADCS0 = x11). To allow the conversion to occur during SLEEP, ensure the
SLEEP instruction immediately follows the instruction that sets the GO/DONE bit.
39500 18C Reference Manual.book Page 16 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39527A-page 26-17
Section 26. 10-bit A/D Converter
10-bit
A/D Converter
26
26.10 A/D Accuracy/Error
In systems where the device frequency is low, use of the A/D RC clock is preferred. At moderate
to high frequencies, TAD should be derived from the device oscillator.
For a given range of analog inputs, the output digital code will be the same. This is due to the
quantization of the analog input to a digital code. Quantization error is typically ± 1/2 LSb and is
inherent in the analog to digital conversion process. The only way to reduce quantization error is
to increase the resolution of the A/D converter.
Offset error measures the first actual transition of a code versus the first ideal transition of a code.
Offset error shifts the entire transfer function. Offset error can be calibrated out of a system or
introduced into a system, through the interaction of the total leakage current and source impedance
at the analog input.
Gain error measures the maximum deviation of the last actual transition and the last ideal transition,
adjusted for offset error. This error appears as a change in slope of the transfer function.
The difference in gain error to full scale error, is that full scale does not take offset error into
account. Gain error can be calibrated out in software.
Linearity error refers to the uniformity of the code changes. Linearity errors cannot be calibrated
out of the system. Integral non-linearity error measures the actual code transition versus the ideal
code transition, adjusted by the gain error for each code.
Differential non-linearity measures the maximum actual code width versus the ideal code width.
This measure is unadjusted.
The maximum pin leakage current is specified in Electrical Specifications parameter D060.
TAD must not violate the minimum and should be minimized to reduce inaccuracies due to noise
and sampling capacitor bleed off.
In systems where the device will enter SLEEP mode after the start of the A/D conversion, the RC
clock source selection is required. In this mode, the digital noise from the modules in SLEEP are
stopped. This method gives high accuracy.
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PIC18C Reference Manual
DS39527A-page 26-18 2000 Microchip Technology Inc.
26.11 Connection Considerations
If the input voltage exceeds the rail values (VSS or VDD) by greater than 0.3V, then the accuracy
of the conversion is out of specification.
An external RC filter is sometimes added for anti-aliasing of the input signal. The R component
should be selected to ensure that the total source impedance is kept under the 2.5 kΩ recommended
specification. Any external components connected (via hi-impedance) to an analog
input pin (capacitor, zener diode, etc.) should have very little leakage current at the pin.
26.12 Transfer Function
The ideal transfer function of the A/D converter is as follows: the first transition occurs when the
analog input voltage (VAIN) is 1 LSb (or Analog VREF / 1024) (Figure 26-7).
Figure 26-7: A/D Transfer Function Digital Code Output
3FEh
003h
002h
001h
000h
0.5 LSb
1 LSb
1.5 LSb
2 LSb
2.5 LSb
1022 LSb
1022.5 LSb
3 LSb
Analog Input Voltage
3FFh
1023 LSb
1023.5 LSb
39500 18C Reference Manual.book Page 18 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39527A-page 26-19
Section 26. 10-bit A/D Converter
10-bit
A/D Converter
26
26.13 Initialization
Example 26-5 shows an initialization of the A/D module.
Example 26-5: A/D Initialization
CLRF ADCON1 ; Configure A/D inputs
BSF PIE1, ADIE ; Enable A/D interrupts
BSF IPR1, ADIP ; High Priority
MOVLW 0xC1 ; RC Clock, A/D is on,
MOVWF ADCON0 ; Channel 0 is selected
MOVLW 0x4E ; Left Justified, AN0 is analog
MOVWF ADCON1 ; Vref comes from AVDD and AVSS
BCF PIR1, ADIF ; Clear A/D interrupt flag bit
BSF INTCON, PEIE ; Enable peripheral interrupts
BSF INTCON, GIE ; Enable all interrupts
;
; Ensure that the required sampling time for the selected input
; channel has elapsed. Then the conversion may be started.
;
BSF ADCON0, GO ; Start A/D Conversion
: ; The ADIF bit will be set and the
: ; GO/DONE bit is cleared upon
: ; completion of the A/D conversion.
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PIC18C Reference Manual
DS39527A-page 26-20 2000 Microchip Technology Inc.
26.14 Design Tips
Question 1: I find that the Analog to Digital Converter result is not always accurate.
What can I do to improve accuracy?
Answer 1:
1. Make sure you are meeting all of the timing specifications. If you are turning the module
off and on, there is a minimum delay you must wait before taking a sample. If you are
changing input channels, there is a minimum delay you must wait for this as well, and
finally there is TAD, which is the time selected for each bit conversion. This is selected in
ADCON0 and should be between 1.6 and 6 µs. If TAD is too short, the result may not be
fully converted before the conversion is terminated, and if TAD is made too long, the voltage
on the sampling capacitor can decay before the conversion is complete. These timing
specifications are provided in the “Electrical Specifications” section. See the device
data sheet for device specific information.
2. Often the source impedance of the analog signal is high (greater than 1 kOhms), so the
current drawn from the source to charge the sample capacitor can affect accuracy. If the
input signal does not change too quickly, try putting a 0.1 µF capacitor on the analog input.
This capacitor will charge to the analog voltage being sampled and supply the instantaneous
current needed to charge the 120 pF internal holding capacitor.
3. In systems where the device frequency is low, use of the A/D clock derived from the device
oscillator is preferred...this reduces, to a large extent, the effects of digital switching noise.
In systems where the device will enter SLEEP mode after start of A/D conversion, the RC
clock source selection is required.This method gives the highest accuracy.
Question 2: After starting an A/D conversion may I change the input channel (for my
next conversion)?
Answer 2:
After the holding capacitor is disconnected from the input channel, typically 100 ns after the GO
bit is set, the input channel may be changed.
Question 3: Do you know of a good reference on A/D’s?
Answer 3:
A good reference for understanding A/D conversions is the “Analog-Digital Conversion Handbook”
third edition, published by Prentice Hall (ISBN 0-13-03-2848-0).
Question 4: I migrated my code from a PIC18CXX2 device with 10-bit A/D to another
device with a 10-bit A/D (such as a PIC18CXX8) and the A/D does not seem
to operate the same. What’s going on?
Answer 4:
The 10-bit A/D on the PIC18CXX2 device is the compatible 10-bit A/D module. This module has
its ADCON bits in the same locations as the PICmicros Mid-Range 10-bit A/D module. The standard
PIC18CXXX 10-bit A/D module (as found on the PIC18CXX8 device) has optimized the bit
locations to ease configuration of the module.
39500 18C Reference Manual.book Page 20 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39527A-page 26-21
Section 26. 10-bit A/D Converter
10-bit
A/D Converter
26
26.15 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is they may be written for
the Base-Line, the Mid-Range, or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to the
10-bit A/D module are:
Title Application Note #
Using the Analog to Digital Converter AN546
Four Channel Digital Voltmeter with Display and Keyboard AN557
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
39500 18C Reference Manual.book Page 21 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39527A-page 26-22 2000 Microchip Technology Inc.
26.16 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Compatible 10-bit A/D module description.
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2000 Microchip Technology Inc. DS39528A-page 27-1
Low
Voltage Detectr
27
Section 27. Low Voltage Detect
HIGHLIGHTS
This section of the manual contains the following major topics:
27.1 Introduction .................................................................................................................. 27-2
27.2 Control Register ........................................................................................................... 27-4
27.3 Operation ..................................................................................................................... 27-5
27.4 Operation During SLEEP ............................................................................................. 27-6
27.5 Effects of a RESET ...................................................................................................... 27-6
27.6 Initialization .................................................................................................................. 27-7
27.7 Design Tips .................................................................................................................. 27-8
27.8 Related Application Notes............................................................................................ 27-9
27.9 Revision History ......................................................................................................... 27-10
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DS39528A-page 27-2 2000 Microchip Technology Inc.
27.1 Introduction
In many applications, the ability to determine if the device voltage (VDD) is below a specified
voltage level is a desirable feature. A window of operation for the application can be created
where the application software can do "housekeeping tasks" before the device voltage exits the
valid operating range. This can be done using the Low Voltage Detect module.
This module is software programmable circuitry, where a device voltage trip point can be specified.
When the voltage of the device becomes lower than the specified point, an interrupt flag is
set. If the interrupt is enabled, the program execution will branch to the interrupt vector address,
and the software can then respond to that interrupt source.
The Low Voltage Detect circuitry is completely under software control. This allows the circuitry
to be "turned off" by the software, which minimizes the current consumption for the device.
Figure 27-1 shows a possible application voltage curve (typically for batteries). Over time the
device voltage decreases. When the device voltage equals voltage VA, the LVD logic generates
an interrupt. This occurs at time TA. The application software then has until the device voltage is
no longer in valid operating range to have shut down the system. Voltage point VB is the minimum
valid operating voltage specification. This gives a time TB. The total time for shutdown is
TB - TA.
Figure 27-1: Typical Low Voltage Detect Application
Time
Voltage
VA
VB
TA
VA = LVD trip point
VB = Minimum valid device
operating voltage
Legend
TB
39500 18C Reference Manual.book Page 2 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39528A-page 27-3
Section 27. Low Voltage Detect
Low
Voltage Detect
27
Figure 27-2 shows the block diagram for the LVD module. A comparator uses an internally generated
reference voltage as the set point. When the selected tap output of the device voltage
crosses the set point (is lower then), the LVDIF bit is set.
Each node in the resister divider represents a “trip point” voltage.
The “trip point” voltage is the minimum supply voltage level at which the device can operate
before the LVD module asserts an interrupt. When the supply voltage is equal to the trip point,
the voltage tapped off of the resistor array is equal to the voltage generated by the internal voltage
reference module. The comparator then generates an interrupt signal setting the LVDIF bit.
This voltage is software programmable to any one of 16 values (see Figure 27-2). The trip point
is selected by programming the LVDL3:LVDL0 bits (LVDCON<3:0>).
Figure 27-2: Low Voltage Detect (LVD) Block Diagram
VDD
LVDIF
16 to 1 MUX
LVDEN
LVD Control
Register
Internally generated
reference voltage
LVDIN
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27.2 Control Register
The Low Voltage Detect Control register controls the operation of the Low Voltage Detect circuitry.
Register 27-1: LVDCON Register
U-0 U-0 R-0 R/W-0 R/W-0 R/W-1 R/W-0 R/W-1
— — IRVST LVDEN LVDL3 LVDL2 LVDL1 LVDL0
bit 7 bit 0
bit 7:6 Unimplemented: Read as '0'
bit 5 IRVST: Internal Reference Voltage Stable Flag bit
1 = Indicates that the Low Voltage Detect logic will generate the interrupt flag at the specified
voltage range.
0 = Indicates that the Low Voltage Detect logic will not generate the interrupt flag at the
specified voltage range, and LVD interrupt should not be enabled
bit 4 LVDEN: Low-voltage Detect Power Enable bit
1 = Enables LVD, powers up LVD circuit
0 = Disables LVD, powers down LVD circuit
bit 3:0 LVDL3:LVDL0: Low Voltage Detection Limit bits
The following shows the typical limits for the low voltage detect circuitry. Refer to the device data
sheet electrical specifications for the actual tested limit.
1111 = External analog input is used (input comes from the LVDIN pin)
1110 = 4.5V min - 4.77V max.
1101 = 4.2V min - 4.45V max.
1100 = 4.0V min - 4.24V max.
1011 = 3.8V min - 4.03V max.
1010 = 3.6V min - 3.82V max.
1001 = 3.5V min - 3.71V max.
1000 = 3.3V min - 3.50V max.
0111 = 3.0V min - 3.18V max.
0110 = 2.8V min - 2.97V max.
0101 = 2.7V min - 2.86V max.
0100 = 2.5V min - 2.65V max.
0011 = 2.4V min - 2.54V max.
0010 = 2.2V min - 2.33V max.
0001 = 2.0V min - 2.12V max.
0000 = 1.8V min - 1.91V max.
Note 1: LVDL3:LVDL0 modes which result in a trip point below the valid operating voltage of
the device are not tested.
2: See the “Electrical Specifications” section, parameter 32 in the Device Data
Sheet for tested limits.
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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Section 27. Low Voltage Detect
Low
Voltage Detect
27
27.3 Operation
The LVD module is useful to add robustness into the application. The device can monitor the
state of the device voltage. When the device voltage enters the voltage window near the lower
limit of the valid operating voltage range, the device can save values to ensure a "clean" shutdown
through the brown-out.
Depending on the power source for the device voltage, the voltage normally decreases relatively
slowly. This means that the LVD module does not need to be constantly operating. To
decrease the current requirements, the LVD circuitry only needs to be enabled for short periods,
where the voltage is checked. After doing the check, the LVD module may be disabled.
Each time that the LVD module is enabled, the circuitry requires some time to stabilize. After the
circuitry has stabilized, all status flags may be cleared. The module will then indicate the proper
state of the system.
Steps to setup the LVD module:
1. Write the value to the LVDL3:LVDL0 bits (LVDCON register) which selects the desired
LVD Trip Point.
2. Ensure that LVD interrupts are disabled (the LVDIE bit is cleared or the GIE bit is cleared).
3. Enable the LVD module (set the LVDEN bit in the LVDCON register).
4. Wait for the LVD module to stabilize (the IRVST bit to become set).
5. Clear the LVD interrupt flag which may have falsely become set while the LVD module stabilized
(clear the LVDIF bit).
6. Enable the LVD interrupt (set the LVDIE and the GIE bits).
Figure 27-3 shows some waveforms that the LVD module may be used to detect.
Figure 27-3: Low Voltage Detect Waveforms
Note: The system design should be done to ensure that the application software is given
adequate time to save values before the device exits the valid operating range or is
forced into a Brown-out Reset.
.
VLVD
VDD
LVDIF
VLVD
VDD
Enable LVD
Internally Generated 50 ms
LVDIF may not be set
Enable LVD
50 ms
LVDIF
LVDIF cleared in software
LVDIF cleared in software
LVDIF cleared in software,
CASE 1:
CASE 2:
LVDIF remains set since LVD condition still exists
Reference stable
Internally Generated
Reference stable
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27.3.1 Reference Voltage Set Point
The internal reference voltage of the LVD module may be used by other internal circuitry (e.g.,
the programmable Brown-out Reset). If these circuits are disabled (lower power consumption),
the reference voltage circuit requires stabilization time before a low voltage condition can be
reliably detected. This time is specified in electrical specification parameter # 36. The low-voltage
interrupt flag will not be enabled until a stable reference voltage is reached. Refer to the
timing diagram in Figure 27-3.
27.3.2 Current Consumption
When the module is enabled the LVD comparator and voltage divider are enabled and will consume
static current. The voltage divider can be tapped from multiple places in the resistor array.
Total current consumption when enabled is specified in electrical specification parameter D022B
(typically < 50 µA).
27.4 Operation During SLEEP
When enabled, the LVD circuitry continues to operate during SLEEP. If the device voltage
crosses the trip point, the LVDIF bit will be set and the device will wake-up from SLEEP. Device
execution will continue from the interrupt vector address, if interrupts have been globally
enabled.
27.5 Effects of a RESET
A device RESET forces all registers to their RESET state. This forces the LVD module to be
turned off.
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2000 Microchip Technology Inc. DS39528A-page 27-7
Section 27. Low Voltage Detect
Low
Voltage Detect
27
27.6 Initialization
Example 27-1 shows an initialization of the LVD module.
Example 27-1: LVD Initialization
MOVLW 0x14 ; Enable LVD, Trip point = 2.5V
MOVWF LVDCON ;
LVD_STABLE
BTFSS LVDCON, IRVST ; Has LVD circuitry stabilized?
GOTO LVD_STABLE ; NO, Wait longer
BCF PIR, LVDIF ; YES, clear LVD interrupt flag
BSF PIE, LVDIE ; Enable LVD interrupt
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27.7 Design Tips
Question 1: The LVD circuitry seems to be generating random interrupts?
Answer 1:
Ensure that the LVD circuitry is stable before enabling the LVD interrupt. This is done by monitoring
the IRVST bit. Once the IRVST bit is set, the LVDIF bit should be cleared and then the
LVDIE bit may be set.
Question 2: How can I reduce the current consumption of the module?
Answer 2:
Low Voltage Detect is used to monitor the device voltage. The power source is normally a battery
that ramps down slowly. This means that the LVD circuity can be disabled for most of the time,
and only enabled occasionally to do the device voltage check.
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2000 Microchip Technology Inc. DS39528A-page 27-9
Section 27. Low Voltage Detect
Low
Voltage Detect
27
27.8 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is they may be written for
the Base-Line, the Mid-Range, or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to the
LVD module are:
Title Application Note #
No related application notes at this time
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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27.9 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Low Voltage Detect module description.
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2000 Microchip Technology Inc. DS39529A-page 28-1
and Sleep Mode
Watchdog Timer
28
Section 28. WDT and SLEEP Mode
HIGHLIGHTS
This section of the manual contains the following major topics:
28.1 Introduction .................................................................................................................. 28-2
28.2 Control Register ........................................................................................................... 28-3
28.3 Watchdog Timer (WDT) Operation .............................................................................. 28-4
28.4 SLEEP (Power-Down) Mode........................................................................................ 28-5
28.5 Initialization ................................................................................................................ 28-11
28.6 Design Tips ................................................................................................................ 28-12
28.7 Related Application Notes.......................................................................................... 28-13
28.8 Revision History ......................................................................................................... 28-14
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28.1 Introduction
The Watchdog Timer and SLEEP functions are two functions that can enhance the system.
The Watchdog Timer may be used to return to operating mode, or to cause a controller RESET
if the program begins to behave erratically. This enhances the overall operation of the system.
The Watchdog Timer (WDT) is a free running on-chip RC oscillator that does not require any
external components. The block diagram is shown in Figure 28-1. This RC oscillator is separate
from the device RC oscillator of the OSC1/CLKI pin. This means that the WDT will run, even if
the clock on the OSC1/CLKI and OSC2/CLKO pins has been stopped, for example, by execution
of a SLEEP instruction.
The Watchdog Timer (WDT) is enabled/disabled by a device configuration bit. If the WDT is
enabled, software execution may not disable this function. When the WDTEN configuration bit is
cleared, the SWDTEN bit enables/disables the operation of the WDT.
Figure 28-1: Watchdog Timer Block Diagram
The SLEEP function halts controller activity and reduces current consumption to a minimum. The
SLEEP mode is a reduced power state, where it is possible to halt almost all activity in the controller.
In this mode, power consumption is very low, allowing for long term operation from battery
powered applications. Normal operation may be resumed when any of several interrupts occur,
the WDT times out, or a RESET occurs.
WDT Timer Postscaler
WDTEN
8 - to - 1 MUX WDTPS<2:0>
WDT
Time-out
8
SWDTEN bit
Configuration bit
Note: WDTPS2:WDTPS0 are bits in a configuration register.
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2000 Microchip Technology Inc. DS39529A-page 28-3
Section 28. Watchdog Timer and SLEEP Mode
and Sleep Mode
Watchdog Timer
28
28.2 Control Register
Register 28-1 shows the WDTCON register. This is a readable and writable register that contains
the SWDTEN control bit. If the WDT enable configuration bit has been cleared, this software controlled
bit enables or disables the WDT.
Register 28-1: WDTCON Register
U-0 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0
— — — — — — — SWDTEN
bit 7 bit 0
bit 7:1 Unimplemented: Read as ’0’
bit 0 SWDTEN: Software Controlled Watchdog Timer Enable bit
1 = Watchdog Timer is on
0 = Watchdog Timer is turned off if the WDTEN configuration bit is ’0’
Legend
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
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28.3 Watchdog Timer (WDT) Operation
During normal operation, a WDT time-out generates a device RESET. If the device is in SLEEP
mode, a WDT time-out causes the device to wake-up and continue with normal operation. This
is known as a WDT wake-up.
The WDT can be permanently enabled by setting the WDTEN configuration bit. If the WDT configuration
bit disables the WDT, then software can be used to enable/disable the WDT through
setting/clearing the SWDTEN bit.
28.3.1 WDT Period
The WDT has a nominal time-out period of 18 ms with no postscaler (see the “Electrical Specifications”
section, parameter 31). The time-out period varies with temperature, VDD and process
variations from part to part (see DC parameters in the “Electrical Specifications” section).
If longer time-outs are desired, a postscaler with a division ratio of up to 1:128 can be assigned
to the WDT. Thus, time-out periods of up to 2.3 seconds can be realized.
The postscaler assignment is specified at time of device programming through the device configuration
bits.
The CLRWDT and SLEEP instructions clear the WDT counter and the WDT postscaler which prevents
it from timing out and generating a device RESET.
When a CLRWDT instruction is executed and the prescaler is assigned to the WDT, the prescaler
count will be cleared, but the prescaler assignment is not changed.
The TO bit in the RCON register will be cleared upon a Watchdog Timer time-out (WDT Reset
and WDT wake-up).
28.3.2 Clearing the WDT Counter
The CLRWDT instruction will force the count value of the WDT counter to ’0’. When the WDT is
disabled (WDTEN configuration bit = ’0’ and SWDTEN is clear), the WDT counter is forced to ’0’
and the internal WDT clock source is disabled. Then, when the WDT is enabled (setting the
SWDTEN bit when previously cleared), the WDT counter starts from a value of ’0’.
28.3.3 WDT Considerations
It should also be taken in account that under worst case conditions (VDD = Minimum, Temperature
= Maximum, WDT postscaler = Maximum), it may take several seconds before a WDT
time-out occurs.
28.3.4 Effects of a RESET
When a device RESET occurs, the Watchdog Timer counter and postscaler counter are cleared
and the TO bit is set.
Table 28-1: Summary of Watchdog Timer Registers
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
CONFIG2H — — — — WDTPS2 WDTPS1 WDTPS0 WDTEN
WDTCON — — — — — — — SWDTEN
RCON IPEN LWRT — RI TO PD POR BOR
Legend: Shaded cells are not used by the Watchdog Timer.
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Section 28. Watchdog Timer and SLEEP Mode
and Sleep Mode
Watchdog Timer
28
28.4 SLEEP (Power-Down) Mode
SLEEP (Power-down) mode is the lowest current consumption state and is entered by executing
a SLEEP instruction. The device oscillator is turned off, so no system clocks are occurring in the
device.
If enabled, the Watchdog Timer will be cleared but keeps running, the PD bit in the RCON register
is cleared, the TO bit is set, and the oscillator driver is turned off. The I/O ports maintain the status
they had before the SLEEP instruction was executed (driving high, low, or hi-impedance).
For lowest current consumption in this mode, all I/O pins should be either at VDD or VSS, with no
external circuitry drawing current from the I/O pin and modules that are specified to have a delta
SLEEP current, should be disabled. I/O pins that are hi-impedance inputs should be pulled high
or low externally, to avoid switching currents caused by floating inputs. The contribution from
on-chip pull-ups on PORTB should be considered.
During SLEEP, the MCLR pin must be at a valid high level.
Some features of the device consume a delta current. These are enabled/disabled by device
configuration bits. These features include the Watchdog Timer (WDT), LVD, and Brown-out
Reset (BOR) circuitry modules.
28.4.1 Wake-up from SLEEP
There are several ways to wake the controller from SLEEP. The WDT can wake-up the controller
when it times out. A RESET will wake the controller and cause the program to restart, and interrupts
(from peripherals or external sources) will wake the controller from SLEEP.
The device can wake-up from SLEEP through one of the following events:
1. Any device RESET, such as MCLR pin = VIL, VDD = VBOR (if enabled).
2. Watchdog Timer Wake-up (if WDT was enabled).
3. Any peripheral module which can set its interrupt flag while in SLEEP, such as:
- An external INT pin
- Change on Port pin
- Comparators
- A/D
- Timer1
- Timer3
- LVD
- MSSP
- Capture
- PSP read or write
- CCP1
- CCP2
- Addressable USART
- PORTB Interrupt on Change
- External Interrupts
- Parallel Slave Port
- Voltage Reference (bandgap)
- WDT
The first event will RESET the device upon wake-up. However, the latter two events will wake
the device and then resume program execution. The TO and PD bits in the RCON register can
be used to determine the cause of device RESET. The PD bit, which is set on power-up, is
cleared when SLEEP is invoked. The TO bit is cleared if WDT time-out occurred (and caused a
wake-up).
When the SLEEP instruction is being executed, the next instruction (PC + 2) is pre-fetched. For
the device to wake-up through an interrupt event, the corresponding interrupt enable bit must be
set (enabled). Wake-up is regardless of the state of the GIE bit. If the GIE bit is clear (disabled),
the device continues execution at the instruction after the SLEEP instruction. If the GIE bit is set
(enabled), the device executes the instruction after the SLEEP instruction and then branches to
the interrupt address. In cases where the execution of the instruction following SLEEP is not
desirable, the user should have a NOP after the SLEEP instruction.
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28.4.2 Wake-up Using Interrupts
When interrupts are globally disabled (GIE cleared) and any interrupt source has both its interrupt
enable bit and interrupt flag bit set, one of the following events will occur:
• If an interrupt condition (interrupt flag bit and interrupt enable bits are set) occurs before the
execution of a SLEEP instruction, the SLEEP instruction will complete as a NOP. Therefore,
the WDT and WDT postscaler will not be cleared, the TO bit will not be set and PD bit will
not be cleared.
• If the interrupt condition occurs during or after the execution of a SLEEP instruction, the
device will immediately wake-up from SLEEP. The SLEEP instruction will be completely
executed before the wake-up. Therefore, the WDT and WDT postscaler will be cleared, the
TO bit will be set and the PD bit will be cleared.
Even if the flag bits were checked before executing a SLEEP instruction, it may be possible for
flag bits to become set before the SLEEP instruction completes. To determine whether a SLEEP
instruction executed, test the PD bit. If the PD bit is set, the SLEEP instruction was executed as
a NOP.
To ensure that the WDT is clear, a CLRWDT instruction should be executed before a SLEEP
instruction.
Figure 28-2: Wake-up from SLEEP Through Interrupt
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
OSC1
CLKOUT(4)
INT pin
INTF flag
(INTCON<1>)
GIE bit
(INTCON<7>)
INSTRUCTION FLOW
PC
Instruction
fetched
Instruction
executed
PC PC+2 PC+4
Inst(PC) = SLEEP
Inst(PC - 1)
Inst(PC + 2)
SLEEP
Processor in
SLEEP
Interrupt Latency(3)
Inst(PC + 4)
Inst(PC + 2)
Inst(INT_addr) Inst(INT_addr + 1)
Dummy cycle Inst(INT_addr)
PC+4 INT_addr INT_addr + 1
Dummy cycle
TOST(2)
PC+4
Note 1: XT, HS or LP oscillator mode assumed.
2: TOST = 1024TOSC (drawing not to scale). This delay will not occur for RC and EC osc modes.
3: GIE = '1' assumed. In this case, after wake-up, the processor jumps to the interrupt routine. If GIE = '0', execution will
continue in-line.
4: CLKOUT is not available in these osc modes, but shown here for timing reference.
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2000 Microchip Technology Inc. DS39529A-page 28-7
Section 28. Watchdog Timer and SLEEP Mode
and Sleep Mode
Watchdog Timer
28
Interrupt sources can wake the controller from SLEEP without actually causing an interrupt. The
interrupt source must have its interrupt enable flag set, but GIE does not need to be set. If GIE
is clear, the controller will wake without vectoring to an interrupt. If GIE is set, the controller will
vector to an interrupt.
If interrupt priority is not used, all interrupt priority bits are set. If interrupt priority is used (any
interrupt priority bit is cleared), GIEH controls high priority interrupts and GIEL controls low priority
interrupts. Table 28-2 shows the response to the interrupt flag bits depending on the state
of the interrupt enable and priority bits.
Table 28-2: SLEEP Mode, Interrupt Enable Bits, and Interrupt Results
Interrupt Source GIE/GIEH PEIE/GIEL Interrupt
Priority
Peripheral
Interrupt Flag
Response to
Interrupt
Any interrupt source
that operates during
SLEEP
X X X 0 SLEEP
10 0
low priority
1 wake
01 1
high priority
1 wake
0 0 X 1 wake
1 0 1 1 High priority
vector followed
1 1 0 1 Low priority
vector followed
Legend: X is don’t care.
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28.4.3 Effects of SLEEP Mode on the On-Chip Oscillator
When the device executes a SLEEP instruction, the Watchdog Timer and prescaler counter are
cleared (if the WDT is enabled), the on-chip clocks and oscillator are turned off and the controller
is held at the beginning of an instruction cycle (Q1 state). With the oscillator off, the OSC1 and
OSC2 signals will stop oscillating. Since all the transistor switching currents have been removed,
SLEEP mode achieves the lowest current consumption of the device (only leakage currents).
Enabling any on-chip feature that will operate during SLEEP will increase the current consumed
during SLEEP. The user can wake from SLEEP through external RESET, Brown-out Reset (if
enabled), external interrupt, Watchdog Timer time-out or a peripheral interrupt.
Table 28-3: Oscillator Selections, SLEEP Mode, and Waking from SLEEP
OSC
Mode OSC1 Pin in SLEEP OSC2 Pin in SLEEP Waking Delays OSC1 in Run OSC2 in Run
RC Floating, pulled high At logic low None R and C set
frequency
CLKO (4Tosc)
RCIO Floating, pulled high Configured as I/O pin None R and C set
frequency
Configured as
I/O pin
LP At quiescent voltage
level
At quiescent voltage
level
TOST (1) XTAL/res XTAL/res
XT At quiescent voltage
level
At quiescent voltage
level
TOST (1) XTAL/res XTAL/res
HS At quiescent voltage
level
At quiescent voltage
level
TOST (1) XTAL/res XTAL/res
HS
w/PLL
At quiescent voltage
level
At quiescent voltage
level
TOST (1) + TPLL (2) XTAL/res XTAL/res
EC Driven by external clock
source
At logic low None Driven by external
clock source
CLKO (4TOSC)
ECIO Driven by external clock
source
Configured as I/O pin None Driven by external
clock source
Configured as
I/O pin
Note 1: OST (Oscillator Start-up Timer) counts 1024 oscillator cycles before allowing controller clocks to resume.
This provides time for the oscillator to start-up and stabilize.
2: A TPLL delay is required to allow the PLL to lock to the oscillator frequency.
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Section 28. Watchdog Timer and SLEEP Mode
and Sleep Mode
Watchdog Timer
28
28.4.4 Wake-up Delays
Several factors affect how much time the controller requires to return to operating mode from
SLEEP. These include oscillator mode and the use of the PLL.
The Oscillator Start-up Timer, OST, counts 1024 oscillator cycles to allow the oscillator to start-up
and stabilize before allowing system clocks to resume. The OST is not enabled for RC and EC
oscillator modes.
28.4.4.1 Oscillator With PLL Enabled Time-out Sequence After Wake-up
The Oscillator Start-up Timer (OST) provides a 1024 oscillator cycle delay after a wake-up from
SLEEP has occurred. 1024 oscillator cycles are not a sufficient amount of time to allow the PLL
to lock at high frequencies. An additional TPLL time is required to allow the PLL to lock before
allowing system clocks to resume.
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28.4.5 Peripheral Module Operation During SLEEP
Table 28-4 gives an overview of which devices operate during SLEEP. For further details, refer to
the individual sections in this reference manual.
Table 28-4: Peripheral Modules Active in SLEEP Mode
28.4.6 Effects of a WDT Time-out
If the WDT has been enabled, either by the WDTEN configuration bit (=’1’) or by the SWDTEN
bit being set, the WDT will wake-up the controller from SLEEP mode and clear the TO bit.
28.4.7 Effects of a Device RESET
When MCLR is asserted, TO is set and PD is clear. All other bits in RCON are unchanged. The
controller will resume code execution at the RESET vector address.
Peripheral Module
Operates
During
SLEEP?
Mode of Operation Wakes from SLEEP?
Timer1, Timer3 Yes External clock/U.S.C.G.,
Asynchronous Counter mode
Yes
A/D Yes A/D clock = RC clock Yes
CCP1, CCP2 Yes Only capture available. Yes, do not rely on capture value
MSSP Yes I
2C – Non-master modes
SPI – Slave mode
Yes
Yes
Addressable USART Yes Synchronous slave mode Yes
PORTB Interrupt on
Change
Yes All Yes
External Interrupts Yes All Yes
Parallel Slave Port Yes All Yes
LVD Yes All Yes
Volt Reference (bandgap) Yes If required to support LVD, and A/D No
WDT Yes All Yes
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Section 28. Watchdog Timer and SLEEP Mode
and Sleep Mode
Watchdog Timer
28
28.5 Initialization
No initialization code at this time.
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28.6 Design Tips
Question 1: My system voltage drops and then returns to the specified device voltage
range. The device is not operating correctly and the WDT does not reset
and return the device to proper operation.
Answer 1:
The WDT was not designed to be a recovery from a brown-out condition. It was designed to
recover from errant software operation (the device remaining in the specified operating ranges).
If your system can be subjected to brown-outs, either the on-chip brown-out circuitry should be
enabled or an external brown-out circuit should be implemented.
Question 2: Device RESETS even though I do the CLRWDT instruction in my loop.
Answer 2:
Make sure that the loop with the CLRWDT instruction meets the minimum specification of the WDT
(not the typical).
Question 3: Device never gets out of RESETS.
Answer 3:
On power-up, you must take into account the Oscillator Start-up time (Tost). Sometimes it helps
to put the CLRWDT instruction at the beginning of the loop, since this start-up time may be variable.
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Section 28. Watchdog Timer and SLEEP Mode
and Sleep Mode
Watchdog Timer
28
28.7 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is, they may be written for
the Base-Line, the Mid-Range or High-End families), but the concepts are pertinent and could be
used (with modification and possible limitations). The current application notes related to the
WDT and SLEEP Mode are:
Title Application Note #
Power-up Trouble Shooting AN607
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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28.8 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Watchdog Timer and SLEEP mode
description.
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2000 Microchip Technology Inc. DS39530A-page 29-1
Device
Configuration Bits
29
Section 29. Device Configuration Bits
HIGHLIGHTS
This section of the manual contains the following major topics:
29.1 Introduction .................................................................................................................. 29-2
29.2 Configuration Word Bits ............................................................................................... 29-3
29.3 Program Verification/Code Protection ........................................................................ 29-10
29.4 ID Locations ............................................................................................................... 29-11
29.5 Device ID ................................................................................................................... 29-11
29.6 Design Tips ................................................................................................................ 29-12
29.7 Related Application Notes.......................................................................................... 29-13
29.8 Revision History ......................................................................................................... 29-14
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29.1 Introduction
The device configuration bits allow each user to customize certain aspects of the device to the
needs of the application. When the device powers up, the state of these bits determines the
modes that the device uses. Section 29.2 “Configuration Word Bits” discusses the configuration
bits and the modes to which they can be configured. These bits are mapped in program
memory locations starting at address 300000h. These locations are accessible during normal
device operation.
The configuration bits can be programmed (read as '0') or left unprogrammed (read as '1') to
select various device configurations. The ability to change these settings once they have been
programmed depends on the memory technology and the package type. This is discussed
below:
• Read Only Memory (ROM) devices: These bits are specified at time of ROM code submittal;
once the device is masked, these bits can not be changed (would require a new mask
code).
• One Time Programmable (OTP) devices: Once the bit is programmed (’0’), it may not be
changed.
• Windowed EPROM devices: Once these bits are programmed (’0’), the device must be UV
erased to return the configuration word to the erased state. UV erasing the device also
erases the program memory. Window devices are for debugging purposes.
• FLASH devices: These bits may be erased and reprogrammed.
Note: Microchip does not recommend code-protecting windowed devices.
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Section 29. Device Configuration Bits
Device
Configuration Bits
29
29.2 Configuration Word Bits
These configuration bits specify some of the device modes and are programmed by a device programmer,
or by using the In-Circuit Serial ProgrammingTM (ICSP) feature of the Enhanced Architecture
devices. The placement of these configuration bits is automatically handled when you
select the device in your device programmer. The desired state of the configuration bits may be
specified in the source code (dependent on the language tool used), or through the programming
interface. After the device has been programmed, the application software may read the configuration
bit values through the Table read instructions. For additional information, please refer to
the Programming Specification of the device.
Note 1: Always ensure that your device programmer has the same device selected as you
are programming.
2: Microchip recommends that the desired configuration bit states be embedded into
the application source code. This is easily done in the MPASM assembler by the use
of the CONFIG directive. See Subsection 29.2.1 “MPASM’s CONFIG Directive.”
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Register 29-1: Configuration Bits
P/R-u
Bit placement is device dependent
A19DIS: Disable A19:A16 Drivers bit
This bit disables the A19:A16 address lines of the system bus so that these pins may be used
as general purpose I/O.
1 = Drivers enabled
0 = Drivers disabled
A15DIS: Disable AD15:AD12 Drivers bit
This bit disables the AD15:AD12 address lines of the system bus so that these pins may be
used as general purpose I/O. The AD15:AD12 address lines may only be disabled when the
system bus is configured for 8-bit data (BW16 = ’0’).
When BW16 = ’1’
1 = Drivers enabled (state of A15DIS is ignored)
0 = Drivers enabled (state of A15DIS is ignored)
When BW16 = ’0’
1 = Drivers enabled
0 = Drivers disabled
A11DIS: Disable AD11:AD8 Drivers bit
This bit disables the AD11:AD8 address lines of the system bus so that these pins may be used
as general purpose I/O. The AD11:AD8 address lines may only be disabled when the system
bus is configured for 8-bit data (BW16 = ’0’).
When BW16 = ’1’
1 = Drivers enabled (state of A11DIS is ignored)
0 = Drivers enabled (state of A11DIS is ignored)
When BW16 = ’0’
1 = Drivers enabled
0 = Drivers disabled
BADIS: Byte Address BA0 Disable bit
1 = Drivers enabled
0 = Drivers disabled
BSDIS: Byte Select UB,LB Disable bit
1 = Drivers enabled
0 = Drivers disabled
BOREN: Brown-out Reset Enable bit
1 = Brown-out Reset enabled
0 = Brown-out Reset disabled
BORV1:BORV0: Brown-out Reset Voltage bits
These bits specify the trip point for the Brown-out Reset circuitry. The values shown below are
for a typical device. Please refer to the device data sheet “Electrical Specifications” section
for the tested range.
11 = VBOR set to 2.5V or 1.8V (device dependent)
10 = VBOR set to 2.7V
01 = VBOR set to 4.2V
00 = VBOR set to 4.5V
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Section 29. Device Configuration Bits
Device
Configuration Bits
29
BW16: 16-bit Bus Width bit
This bit specifies the data width of the system bus.
1 = System Bus has 16-bit data bus
0 = System Bus has 8-bit data bus
CCP2MX: CCP2 Mux bit
1 = CCP2 input/output is multiplexed with an I/O
0 = CCP2 input/output is multiplexed with a different I/O
CP: Code Protection bits (apply when in Code Protected Microcontroller Mode)
1 = Program memory code protection off
0 = All of program memory code protected
DP: Data EEPROM Memory Code Protection bit
1 = Code protection off
0 = Data EEPROM memory is code protected
Note: This bit is used when a ROM program memory device or a ROMless device has
Data EEPROM memory.
FOSC2:FOSC0: Oscillator Selection bits
111 = RC oscillator w/ OSC2 configured as I/O
110 = HS oscillator with PLL enabled/clock frequency = (4 x FOSC1)
101 = EC oscillator w/ OSC2 configured as I/O
100 = EC oscillator w/ OSC2 configured as divide by 4 clock output
011 = RC oscillator
010 = HS oscillator
001 = XT oscillator
000 = LP oscillator
OSCSEN: Oscillator System Clock Switch Enable bit
1 = Oscillator system clock switch option is disabled (main oscillator is source)
0 = Oscillator system clock switch option is enabled (oscillator switching is enabled)
PM1:PM0: Processor Mode Select bits
These bits select the processor operating mode for the device. The processor operating mode
specifies how the program memory is mapped (internal/external) and the default configuration
of the system bus pins.
11 = Microprocessor mode
10 = Microcontroller mode
01 = Reserved
00 = Extended microcontroller mode
PWRTEN: Power-up Timer Enable bit
1 = PWRT disabled
0 = PWRT enabled
STVREN: Stack Full/Underflow Reset Enable bit
1 = Stack Full/Underflow will cause RESET
0 = Stack Full/Underflow will not cause RESET
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WAIT: System Bus Wait bit
This bit is used to enable wait states for table reads and table writes to external memory on the
system bus
1 = Wait selections unavailable, device will not wait
0 = Wait programmed by WAIT1 and WAIT0 bit in MEMCON register
WDIS: Write Select WRH, WRL Disable bit
1 = Drivers enabled
0 = Drivers disabled
WDTPS2:WDTPS0: Watchdog Timer Postscale Select bits
111 = 1:1
110 = 1:2
101 = 1:4
100 = 1:8
011 = 1:16
010 = 1:32
001 = 1:64
000 = 1:128
WDTEN: Watchdog Timer Enable bit
1 = WDT enabled
0 = WDT disabled (control is placed on the SWDTEN bit, in register WDTCON)
Legend
R = Readable bit P = Programmable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR reset ’1’ = bit is set ’0’ = bit is cleared x = bit is unknown
Note 1: The position of the configuration bits is device dependent. Please refer to the device
programming specification for bit placement. You are not required to know the configuration
bit positions when using a Microchip device programmer. This is
addressed by either the configuration direction of the software tool or MPLAB’s user
interface.
2: In ROMless devices, some of the system bus configuration bits are hardwired into
a set configuration. Other bits may be placed in protected SFR locations which can
only be modified after properly writing to the CMLK1:CMLK0 bits.
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Section 29. Device Configuration Bits
Device
Configuration Bits
29
29.2.1 MPASM’s CONFIG Directive
Microchip’s assembler, MPASM, has a nice feature (directives) that allows you to specify the
device configuration in the source code file. This ensures that when programming a device for
an application, the required configuration is also programmed. This minimizes the risk of programming
the wrong device configuration and then wondering why it no longer works in the application
(unexpected operation).
Example 29-1 shows a template for using the CONFIG directive.
Example 29-1: Using the CONFIG Directive, a Source File Template
The symbols currently in the Microchip Device Header files make using the CONFIG directive
straight forward. These are shown in Table 29-1. The symbols available for your device are listed
in the Microchip Include file for that device.
LIST p = p18C452 ; List Directive,
; Revision History
;
#INCLUDE ; Microchip Device Header File
;
#INCLUDE ; File which includes my standard macros
#INCLUDE ; File which includes macros specific
; to this application
;
; Specify Device Configuration Bits for
; Program Configuration Registers 0 through 6
__CONFIG _CONFIG0, CP_OFF_0
__CONFIG _CONFIG1, LPSCEN_OFF_1 & RCRA6_OSC_1
__CONFIG _CONFIG2, BORV_25_2 & BOREN_ON_2 & PWRTEN_OFF_2
__CONFIG _CONFIG3, WDPS_128_3 & WDT_ON_3
__CONFIG _CONFIG5, CCP2MX_ON_5
__CONFIG _CONFIG6, SVTREN_ON_6
;
org 0x00 ; Start of Program Memory
RESET_ADDR : ; First instruction to execute after a reset
end
Note: As long as the correct device is specified (in the LIST and INCLUDE file directives),
the correct polarity of all bits is ensured.
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Table 29-1: _CONFIG Directive Symbols (from Microchip Header Files) (1)
Feature Configuration
Byte Symbols Comment
Oscillators _CONFIG1H
_LP_OSC_1 LP mode for device
_XT_OSC_1 XT mode for device
_HS_OSC_1 HS mode for device oscillator
_RC_OSC_1 RC mode for device oscillator
_RCIO_OSC_1 RC mode for device oscillator
with clockout configured as I/O pin
_EC_OSC_1 EC (external clock) mode for
device oscillator
_ECIO_OSC_1
EC (external clock) mode for
device oscillator with clockout
configured as I/O pin
_HS4_OSC_1 HS mode with 4 x PLL
for device oscillator
_HSPLL_OSC_1 HS mode with 4 x PLL for device
oscillator (4)
Oscillator
Switch _CONFIG1H _LPSCEN_ON_1 Oscillator switch enabled
_LPSCEN_OFF_1 Oscillator switch disabled
Code Protect _CONFIG1L _CP_ON_0 Code Protect enabled
_CP_OFF_0 Code Protect disabled
Watchdog
Timer _CONFIG2H _WDT_ON_3 Watchdog Timer enabled
_WDT_OFF_3 Watchdog Timer disabled
Watchdog
Timer
Postscale
Assignment
_CONFIG2H
_WDTPS_128_3 WDT prescaler set to 1:128
_WDTPS_64_3 WDT prescaler set to 1:64
_WDTPS_32_3 WDT prescaler set to 1:32
_WDTPS_16_3 WDT prescaler set to 1:16
_WDTPS_8_3 WDT prescaler set to 1:8
_WDTPS_4_3 WDT prescaler set to 1:4
_WDTPS_2_3 WDT prescaler set to 1:2
_WDTPS_1_3 WDT prescaler set to 1:1
Power-up
Timer _CONFIG2L _PWRTEN_ON_2 Power-up Timer enabled
_PWRTEN_OFF_2 Power-up Timer disabled
Brown-out
Reset _CONFIG2L _BOREN_ON_2 Brown-out Reset enabled
_BOREN_OFF_2 Brown-out Reset disabled
BOR
Trip-Point
Voltage
_CONFIG2L
_BORV_18_2 BOR trip point = 1.8V min (2, 3)
_BORV_25_2 BOR trip point = 2.5V min (2, 3)
_BORV_27_2 BOR trip point = 2.7V min (3)
_BORV_42_2 BOR trip point = 4.2V min (3)
_BORV_45_2 BOR trip point = 4.5V min (3)
Note 1: Not all configuration bit symbols may be available on any one device. Please refer to
the Microchip include file of that device for available symbols.
2: The option for a 1.8V or 2.5V BOR trip point is device dependent. Only one of these
symbols will be available in the Microchip supplied header file.
3: These are the trip points for a typical device. Other trip points (symbols) may be specified
for the device.
4: Symbol obsoleted and may not be available in header file.
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Section 29. Device Configuration Bits
Device
Configuration Bits
29
CCP2 pin
Multiplex _CONFIG3H _CCP2MX_ON_5 CCP2 out multiplexer enabled
_CCP2MX_OFF_5 CCP2 out multiplexer disabled
Processor
Mode _CONFIG3L
_MP_MODE_4 Microprocessor mode
_MC_MODE_4 Microcontroller mode
_XMC_MODE_4 Extended Microcontroller mode
External Data
Bus Wait _CONFIG3L _WAIT_ON_4 Wait on external data bus enabled
_WAIT_OFF_4 Wait on external data bus disabled
System Bus
A19 Disable _CONFIG4H _A19DIS_ON_7 System bus A19 disabled
_A19DIS_OFF_7 System bus A19 enabled
System Bus
A15 Disable _CONFIG4H _A15DIS_ON_7 System bus A15 disabled
_A15DIS_OFF_7 System bus A15 enabled
System Bus
A11 Disable _CONFIG4H _A11DIS_ON_7 System bus A11 disabled
_A11DIS_OFF_7 System bus A11 enabled
Byte Address
BA0 Disable _CONFIG4H _BADIS_ON_7 Byte Address BA0 disabled
_BADIS_OFF_7 Byte Address BA0 enabled
Byte Select
Disable _CONFIG4H _BSDIS_ON_7 Byte Select disabled
_BSDIS_OFF_7 Byte Select enabled
Write Select
Disable _CONFIG4H _WDIS_ON_7 Write Select disabled
_WDIS_OFF_7 Write Select enabled
Stack
Full/Overflow _CONFIG4L _STVREN_ON_6 Stack full/overflow rest enabled
_STVREN_OFF_6 Stack full/overflow rest disabled
Code Protect
Data
EEPROM
TBD
_DP_ON Data EEPROM protect enabled
_DP_OFF Data EEPROM protect disabled
Note 1: Not all configuration bit symbols may be available on any one device. Please refer to
the Microchip include file of that device for available symbols.
2: The option for a 1.8V or 2.5V BOR trip point is device dependent. Only one of these
symbols will be available in the Microchip supplied header file.
Table 29-1: _CONFIG Directive Symbols (from Microchip Header Files) (1) (Continued)
Feature Configuration
Byte Symbols Comment
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29.3 Program Verification/Code Protection
If the code protection bit(s) have not been programmed, the on-chip program memory can be
read out for verification purposes.
29.3.1 ROM Devices
When a ROM device also has Data EEPROM memory, an additional code protect configuration
bit may be implemented. The program memory configuration bit is submitted as part of the ROM
code submittal. The Data EEPROM memory code protect configuration bit will be an EEPROM
bit. When ROM devices complete testing, the EEPROM data memory code protect bit will be programmed
to the same state as the program memory code protect bit. That is, Data EEPROM
code protect is off when program memory code protect is off and Data EEPROM code protect is
on for all other selections.
In applications where the device is code protected and the Data EEPROM needs to be programmed
before the application can be released, the Data EEPROM memory must have the
entire Data EEPROM memory erased. The device programming specification details the steps
to do this. Microchip device programmers implement the specified sequence. Once this
sequence is complete, the Data EEPROM memory code protect is disabled. This allows the
desired data to be programmed into the device. After programming the Data EEPROM memory
array, the Data EEPROM memory code protect configuration bit should be programmed as
desired.
Note: Microchip does not recommend code protecting windowed devices.
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Section 29. Device Configuration Bits
Device
Configuration Bits
29
29.4 ID Locations
Five memory locations (200000h - 200004h) are designated as ID locations where the user can
store checksum or other code-identification numbers. These locations are accessible during normal
execution through the TBLRD instruction, or during program/verify. The ID locations can be
read when the device is code protected.
29.5 Device ID
One memory location (two bytes) (3FFFFEh-3FFFFFh) is designated as the Device ID location.
The value at this location is specified by Microchip and is useful in determining the device.
Device ID bits can be used by a device programmer to retrieve information about what device is
being programmed and what the revision of the device is.
The Device ID can be accessed by a TBLRD instruction or via serial program/verify. The Device
ID can be read when the part is code protected.
The 5 LSbs are the device revision information, and the remaining 11 bits contain the device ID
number. This is shown in Table 29-2.
Table 29-2: Device ID Registers
Register Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
DEVID2 DEV10 DEV9 DEV8 DEV7 DEV6 DEV5 DEV4 DEV3
DEVID1 DEV2 DEV1 DEV0 REV4 REV3 REV2 REV1 REV0
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29.6 Design Tips
Question 1: I have a JW device and I can no longer program it (reads scrambled data or
all '0's). What’s wrong with the device?
Answer 1:
Nothing. You probably code protected the device. If this is the case, the device is no longer
usable. See Section 29.3 “Program Verification/Code Protection” for more details.
Question 2: In converting from a PIC16C74 to a PIC18C452, my application no longer
works.
Answer 2:
1. Did you re-assemble the source file specifying the PIC18C452 in the INCLUDE file and
LIST directives? The use of the CONFIG directive is highly recommended.
2. On the device programmer, did you specify the PIC18C452, and were all the configuration
bits as desired?
Question 3: When I erase the device, the program memory is blank but the configuration
word is not yet erased.
Answer 3:
That is by design. Also remember that Microchip does not recommend code protecting windowed
devices.
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2000 Microchip Technology Inc. DS39530A-page 29-13
Section 29. Device Configuration Bits
Device
Configuration Bits
29
29.7 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced MCU family (that is, they may be written
for the Base-Line, Mid-Range or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to Configuration
Word are:
Title Application Note #
No related Application Notes at this time.
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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29.8 Revision History
Revision A
This is the initial released revision of the Configuration Word description.
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2000 Microchip Technology Inc. DS39531A-page 30-1
ICSP
30
Section 30. In-Circuit Serial Programming™ (ICSP™)
HIGHLIGHTS
This section of the manual contains the following major topics:
30.1 Introduction .................................................................................................................. 30-2
30.2 Entering In-Circuit Serial Programming Mode ............................................................. 30-3
30.3 Application Circuit ........................................................................................................ 30-4
30.4 Programmer ................................................................................................................. 30-6
30.5 Programming Environment .......................................................................................... 30-6
30.6 Other Benefits .............................................................................................................. 30-7
30.7 Field Programming of PICmicro OTP MCUs................................................................ 30-8
30.8 Field Programming of FLASH PICmicro MCUs ......................................................... 30-10
30.9 Design Tips ................................................................................................................ 30-12
30.10 Related Application Notes.......................................................................................... 30-13
30.11 Revision History ......................................................................................................... 30-14
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30.1 Introduction
All Enhanced MCU devices can be In-Circuit Serial Programmed (ICSP™) while in the end application
circuit. This is simply done with two lines for clock and data, and three other lines for
power, ground and the programming voltage.
In-Circuit Serial Programming (ICSP™) is a great way to reduce your inventory overhead and
time-to-market for your product. By assembling your product with a blank Microchip microcontroller
(MCU), you can stock one design. When an order has been placed, these units can be
programmed with the latest revision of firmware, tested and shipped in a very short time. This
method also reduces scrapped inventory due to old firmware revisions. This type of manufacturing
system can also facilitate quick turnarounds on custom orders for your product.
Most people would think to use ICSP with PICmicro® OTP MCUs only on an assembly line where
the device is programmed once. However, there is a method by which an OTP device can be
programmed several times depending on the size of the firmware. This method, explained in
Section 30.7, provides a way to field upgrade your firmware in a way similar to EEPROM- or
FLASH-based devices.
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Section 30. ICSP
ICSP
30
30.2 Entering In-Circuit Serial Programming Mode
The device is placed into a program/verify mode by holding the CLOCK (typically on the RB6 pin)
and DATA (typically on the RB7 pin) pins low, while raising the MCLR (VPP) pin from VIL to VIHH
(see programming specification) and having VDD at the programming voltage. Both the CLOCK
and DATA pins are Schmitt Trigger inputs in this mode. When in I/O mode and RB7 is driving
data, it is a CMOS output driver.
After RESET, to place the device into programming/verify mode, the program counter (PC) is at
location 00h. A command is then supplied to the device. Some commands then specify that
16-bits of program data are then supplied to or read from the device, depending on whether the
command was a load or a read. For complete details of serial programming, please refer to the
device specific Programming Specifications.
During the In-Circuit Serial Programming Mode, the WDT circuitry is disabled from generating a
device RESET.
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30.3 Application Circuit
The application circuit must be designed to allow all the programming signals to be directly connected
to the PICmicro MCU. Figure 30-1 shows a typical circuit that is a starting point when
designing with ICSP. The application must compensate for the following:
1. Isolation of the MCLR/VPP pin from the rest of the circuit
2. Loading of pins CLOCK and DATA
3. Capacitance on each of the VDD, MCLR/VPP, CLOCK and DATA pins
4. Minimum and maximum operating voltage for VDD
5. PICmicro oscillator
30.3.1 Isolation of the MCLR/VPP Pin from the Rest of the Circuit
The MCLR/VPP pin is normally connected to an RC circuit. The pull-up resistor is tied to VDD and
a capacitor is tied to ground. This circuit can affect the operation of ICSP depending on the size
of the capacitor, since the VPP voltage must be isolated from the rest of the circuit . The resistor
(R1) should be greater than 10kΩ to provide isolation between VDD and VPP. It is, therefore, recommended
that the circuit in Figure 30-1 be used when an RC is connected to MCLR/VPP.
Another consideration with MCLR/VPP is that when the PICmicro device is programmed, this pin
is driven to approximately 13V and also to ground. Therefore, the application circuit must be isolated
from this voltage provided by the programmer.
30.3.2 Loading of Pins CLOCK and DATA
The CLOCK and DATA pins are used by the PICmicro MCU for serial programming. CLOCK is
driven by the programmer. DATA is a bi-directional pin that is driven by the programmer when
programming, and driven by the MCU when verifying. These pins must be isolated from the rest
of the application circuit so as not to affect the signals during programming. You must take into
consideration the output impedance of the programmer when isolating CLOCK and DATA from
the rest of the circuit. This isolation circuit must account for CLOCK being an input on the MCU
and for DATA being bi-directional (can be driven by both the MCU and the programmer). For
instance, PRO MATE® II has an output impedance of 1kΩ. If the design permits, these pins
should not be used by the application. This is not the case with most applications, so it is recommended
that the designer evaluate whether these signals need to be buffered. As a designer,
you must consider what type of circuitry is connected to CLOCK and DATA and then make a decision
on how to isolate these pins. Figure 30-1 does not show any circuitry to isolate CLOCK and
DATA on the application circuit, because this is very application dependent.
To simplify this interface, the optimal usage of these I/O pins in the application are (in order):
1. Dedicate the CLOCK/DATA pins for the ICSP interface (not connected to other circuitry).
2. Use these pins as outputs with minimal loading on the signal line.
3. Use isolation circuitry so these signals can be driven to the ICSP specifications.
Figure 30-1: Typical In-Circuit Serial Programming (ICSP) Application Circuit
Application PCB
PIC18CXXX
MCLR/VPP
VDD
VSS
DATA
CLOCK
VDD/VPP VDD
To application circuit
Isolation circuits
R2 ICSP Connector
R1
C1
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2000 Microchip Technology Inc. DS39531A-page 30-5
Section 30. ICSP
ICSP
30
30.3.3 Capacitance on Each of the VDD, MCLR/VPP, CLOCK and DATA Pins
The total capacitance on the programming pins affects the rise rates of these signals as they are
driven out of the programmer. Typical circuits use several hundred microfarads of capacitance
on VDD, which helps to dampen noise and ripple. However, this capacitance requires a fairly
strong driver in the programmer to meet the rise rate timings for VDD. Most programmers are
designed to simply program the MCU itself and don’t have strong enough drivers to power the
application circuit. One solution is to use a driver board between the programmer and the application
circuit. The driver board requires a separate power supply that is capable of driving the
VPP and VDD pins with the correct rise rates and should also provide enough current to power
the application circuit. CLOCK and DATA are not buffered on this schematic, but may require
buffering depending upon the application. A sample driver board schematic is shown in
Figure 30-2.
30.3.4 Minimum and Maximum Operating Voltage for VDD
The Microchip programming specification states that the device should be programmed at 5V.
Special considerations must be made if your application circuit operates at 3V only. These considerations
may include totally isolating the MCU during programming. Another consideration is
the device must be verified at the minimum and maximum voltages at which the application circuit
will be operating. For instance, a battery operated system may operate from three 1.5V cells
giving an operating voltage range of 2.7V to 4.5V. The programmer must program the device at
5V and must verify the program memory contents at both 2.7V and 4.5V to ensure that proper
programming margins have been achieved. This ensures the PICmicro MCU operation over the
voltage range of the system.
30.3.5 PICmicro Oscillator
The final consideration deals with the oscillator circuit on the application board. The voltage on
MCLR/VPP must rise to the specified program mode entry voltage before the device executes
any code. The crystal modes available on the device are not affected by this, because the Oscillator
Start-up Timer waits for 1024 oscillations before any code is executed. However, RC or EC
oscillators do not require any start-up time; therefore, the Oscillator Start-up Timer is not used.
The programmer must drive MCLR/VPP to the program mode entry voltage before the RC or EC
oscillator toggles four times. If the RC or EC oscillator toggles four or more times, the program
counter will be incremented to some value X. When the device enters programming mode, the
program counter will not be zero and the programmer will start programming your code at an offset
of X. There are several alternatives that can compensate for a slow rise rate on MCLR/VPP.
The first method is to not populate the resistor (R1) in Figure 30-1, program the device, and then
insert the resistor (R1). The other method is to have the programming interface drive the OSC1
pin of the PICmicro MCU to ground while programming. This will prevent any oscillations from
occurring during programming.
Connecting the application circuit to the programmer is dependent on the programming environment.
Refer to Section 30.5 "Programming Environment" for more details.
Note: The driver board design MUST be tested in the user's application to determine the
effects of the application circuit on the programming signals timing. Changes may
be required if the application places a significant load on the VDD, VPP, CLOCK or
DATA pins.
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DS39531A-page 30-6 2000 Microchip Technology Inc.
30.4 Programmer
PIC18CXXX MCUs only use serial programming and, therefore, all programmers supporting
these devices will support ICSP. One area of consideration with the programmer is the drive
capability. As discussed before, it must be able to provide the specified rise rates on the ICSP
signals and also provide enough current to power the application circuit. Figure 30-2 shows an
example driver board. This driver schematic does not show any buffer circuitry for CLOCK and
DATA. It is recommended that an evaluation be performed to determine if buffering is required.
Another consideration with the programmer is what VDD levels are used to verify the memory
contents of the device. For instance, the PRO MATE II verifies program memory at the minimum
and maximum VDD levels for the specified device and is, therefore, considered a production quality
programmer. On the other hand, the PICSTART® Plus only verifies at 5V and is for prototyping
use only. The Microchip programming specifications state that the program memory contents
should be verified at both the minimum and maximum VDD levels that the application circuit will
be operating. This implies that the application circuit must be able to handle the varying VDD voltages.
There are also several third party programmers that are available. You should select a programmer
based on the features it has and how it fits into your programming environment. The Microchip
Development Systems Ordering Guide (DS30177) provides detailed information on all our
development tools. The Microchip Third Party Guide (DS00104) provides information on all of
our third party tool developers. Please consult these two references when selecting a programmer.
Many options exist, including serial or parallel PC host connection, stand-alone operation,
and single or gang programmers. Some of the third party developers include Advanced Transdata
Corporation, BP Microsystems, Data I/O, Emulation Technology, and Logical Devices.
30.5 Programming Environment
The programming environment affects the type of programmer used, the programmer cable
length and the application circuit interface. Some programmers are well suited for a manual
assembly line, while others are desirable for an automated assembly line. You may want to
choose a gang programmer to program multiple systems at a time.
The physical distance between the programmer and the application circuit affects the load capacitance
on each of the programming signals. This directly affects the drive strength needed to provide
the correct signal rise rates and current. This programming cable must also be as short as
possible and properly terminated and shielded, or the programming signals may be corrupted by
ringing or noise.
Finally, the application circuit interface to the programmer depends on the size constraints of the
application circuit itself and the assembly line. A simple header can be used to interface the application
circuit to the programmer. This might be more desirable for a manual assembly line where
a technician plugs the programmer cable into the board. A different method uses spring loaded
test pins (commonly referred to as pogo pins). The application circuit has pads on the board for
each of the programming signals, and there is a fixture that has pogo pins in the corresponding
configuration. The application circuit or fixture is moved into position, such that the pogo pins
come into contact with the board. This method might be more suitable for an automated assembly
line.
After taking into consideration the various points with the application circuit, the programmer and
the programming environment, anyone can build a high quality, reliable manufacturing line based
on ICSP.
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2000 Microchip Technology Inc. DS39531A-page 30-7
Section 30. ICSP
ICSP
30
30.6 Other Benefits
ICSP provides other benefits, such as calibration and serialization.
If program memory permits, it would be cheaper and more reliable, to store calibration constants
in program memory instead of using an external serial EEPROM. For example, if your system
has a thermistor that can vary from one system to another, storing some calibration information
in a table format allows the microcontroller to compensate (in software) for external component
tolerances. System cost can be reduced without affecting the required performance of the system
by using software calibration techniques. But how does this relate to ICSP? The PICmicro
MCU has already been programmed with firmware that performs a calibration cycle. The calibration
data is transferred to a calibration fixture. When all calibration data has been transferred, the
fixture places the PICmicro MCU in programming mode and programs the PICmicro MCU with
the calibration data. Application note AN656, "In-Circuit Serial Programming of Calibration
Parameters Using a PICmicro Microcontroller," shows exactly how to implement this type of calibration
data programming.
The other benefit of ICSP is serialization. Each individual system can be programmed with a
unique or random serial number. One such application of a unique serial number would be for
security systems. A typical system might use DIP switches to set the serial number. Instead, this
number can be burned into program memory, thus reducing the overall system cost and lowering
the risk of tampering.
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PIC18C Reference Manual
DS39531A-page 30-8 2000 Microchip Technology Inc.
30.7 Field Programming of PICmicro OTP MCUs
An OTP device is not normally capable of being reprogrammed, but the PICmicro architecture
gives you this flexibility, provided the size of your firmware is at least half that of the desired
device, and the device is not code protected. If your target device does not have enough program
memory, Microchip provides a wide spectrum of devices from 0.5K to 16K word program memory
with the same set of peripheral features that will help meet the criteria.
The Enhanced MCU devices have three vectors; RESET and two interrupt vector addresses.
When the PICmicro device encounters a RESET or interrupt condition, the code located at one
of these locations in program memory is executed.
For an example of reprogramming an OTP device, we will use an example from our Mid-Range
family. This technology is applicable to all EPROM based PICmicro devices. The first listing of
Example 30-1 shows the code that is first programmed into the PICmicro device. The second listing
of Example 30-1 shows the code that is programmed into the PICmicro device for the second
time.
Example 30-1 shows that to program the device a second time, the memory location 0x0000
(originally goto Main (0x2808)), is reprogrammed to all 0’s. This happens to be a NOP instruction.
This location cannot be reprogrammed to the new opcode (0x2860), because the bits that
are 0’s cannot be reprogrammed to 1’s. Only bits that are 1’s can be reprogrammed to 0’s. The
next memory location, 0x0001, was originally blank (all 1’s) and now becomes a goto Main
(0x2860). When a RESET condition occurs, the MCU executes the instruction at location
0x0000, which is the NOP (a completely benign instruction), and then executes the goto Main
to start the execution of code. The example also shows that all program memory locations after
0x005A are blank in the original program, so that the second time the PICmicro device is programmed,
the revised code can be programmed at these locations. The same descriptions can
be given for the interrupt vector locations.
Now your one-time programmable Enhanced MCU is exhibiting EEPROM- or FLASH-like
qualities.
39500 18C Reference Manual.book Page 8 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39531A-page 30-9
Section 30. ICSP
ICSP
30
Example 30-1: Programming Cycle Listing Files
First Program Cycle Second Program Cycle
_________________________________________________________________________________________
Prog Opcode Assembly | Prog Opcode Assembly
Mem Instruction | Mem Instruction
-----------------------------------------------------------------------------------------
0000 2808 goto Main ;Main loop | 0000 0000 nop
0001 3FFF ; at 0x0008 | 0001 2860 goto Main; Main now
0002 3FFF | 0002 3FFF ; at 0x0060
0003 3FFF | 0003 3FFF
0004 2848 goto ISR ; ISR at | 0004 0000 nop
0005 3FFF ; 0x0048 | 0005 28A8 goto ISR ; ISR now at
0006 3FFF | 0006 3FFF ; 0x00A8
0007 3FFF | 0007 3FFF
0008 1683 bsf STATUS,RP0 | 0008 1683 bsf STATUS,RP0
0009 3007 movlw 0x07 | 0009 3007 movlw 0x07
000A 009F movwf ADCON1 | 000A 009F movwf ADCON1
. |.
. |.
. |.
0048 1C0C btfss PIR1,RBIF | 0048 1C0C btfss PIR1,RBIF
0049 284E goto EndISR | 0049 284E goto EndISR
004A 1806 btfsc PORTB,0 | 004A 1806 btfsc PORTB,0
. |.
. |.
. |.
0060 3FFF | 0060 1683 bsf STATUS,RP0
0061 3FFF | 0061 3005 movlw 0x05
0062 3FFF | 0062 009F movwf ADCON1
. |.
. |.
. |.
00A8 3FFF | 00A8 1C0C btfss PIR1,RBIF
00A9 3FFF | 00A9 28AE goto EndISR
00AA 3FFF | 00AA 1806 btfsc PORTB,0
. |.
. |.
. |.
-----------------------------------------------------------------------------------------
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PIC18C Reference Manual
DS39531A-page 30-10 2000 Microchip Technology Inc.
30.8 Field Programming of FLASH PICmicro MCUs
With the ICSP interface circuitry already in place, FLASH-based PICmicro MCUs can be easily
reprogrammed in the field. These FLASH devices allow you to reprogram them even if they are
code protected. A portable ICSP programming station might consist of a laptop computer and
programmer. The technician plugs the ICSP interface cable into the application circuit and downloads
the new firmware into the device. The next thing you know, the system is up and running
without those annoying “bugs.” Another instance would be that you want to add an additional feature
to your system. All of your current inventory can be converted to the new firmware, and field
upgrades can be performed to bring your installed base of systems up to the latest revision of
firmware.
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2000 Microchip Technology Inc. DS39531A-page 30-11
Section 30. ICSP
ICSP
30
Figure 30-2: Example Driver Board Schematic C6 0.1 PRB6 PVDD 2 3
1 14
7
U2A
74HC126
5 6
4
U2B
74HC126
R3
1
CLOCK
+8V
PVDD
R6
100
R7
100
3
2 1Q1
2N2907
1 2
3
Q3
2N2222
12
13
14
U1D
TLE2144A
R5
100
C7
0.001 VDD
3
2 1
4
11
U1A
TLE2144A
C3
0.1
+15V
R1
5.1k
R8
100
3
2 1Q2
2N2907
R4
1
PVPP
9 8
10 U2C 74HC126
12 11
13 U2D 74HC126
DATA
CLOCK
PVPP
PVDD
1
2
3
4
5
JP3
HEADER
+15V
R2
5.1k
R9
100 1 2
3
Q4
2N2222
10
9 8
U1C
TLE2144A
R10
100
C8
0.001
DATA
VPP
VPP
VDD
1
2
3
4
5
JP1
HEADER
5
6 7
U1B
TLE2144A
CLOCK
1 +15V 2
JP2
HEADER
C5
0.1
VIN 1
GND
3
VOUT 2
VR1
LM7808
C9
100
+15V
C4
0.1
+8V
Note: All resistors are in Ohms,
all capacitors are in µF.
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PIC18C Reference Manual
DS39531A-page 30-12 2000 Microchip Technology Inc.
30.9 Design Tips
Question 1: When I try to do ICSP, the entire program is shifted (offset) in the device
program memory.
Answer 1:
If the MCLR pin does not rise fast enough, while the device’s voltage is in the valid operating
range, the internal Program Counter (PC) can increment. This means that the PC is no longer
pointing to the address that you expected. The exact location depends on the number of device
clocks that occurred in the valid operating region of the device.
Question 2: I am using a PRO MATE II with a socket that I designed to bring the programming
signal to my application board. Sometimes when I try to do ICSP,
the program memory is programmed wrong.
Answer 2:
The voltages / timings may be violated at the device. This could be due to the:
• Application board circuitry
• Cable length from programmer to target
• Large capacitance on VDD that affects levels / timings
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2000 Microchip Technology Inc. DS39531A-page 30-13
Section 30. ICSP
ICSP
30
30.10 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is, they may be written for
the Base-Line, the Mid-Range or High-End families), but the concepts are pertinent, and could
be used (with modification and possible limitations). The current application notes related to
In-Circuit Serial Programming are:
Title Application Note #
In-Circuit Serial Programming of Calibration Parameters using a
PICmicro® Microcontroller AN656
In-Circuit Serial Programming Guide DS30277
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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PIC18C Reference Manual
DS39531A-page 30-14 2000 Microchip Technology Inc.
30.11 Revision History
Revision A
This is the initial released revision of the Enhanced MCU In-Circuit Serial Programming module
description.
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2000 Microchip Technology Inc. DS39532A-page 31-1
Instruction Set
31
Section 31. Instruction Set
HIGHLIGHTS
This section of the manual contains the following major topics:
31.1 Introduction .................................................................................................................. 31-2
31.2 Data Memory Map ....................................................................................................... 31-3
31.3 Instruction Formats ...................................................................................................... 31-9
31.4 Special Function Registers as Source/Destination .................................................... 31-12
31.5 Fast Register Stack.................................................................................................... 31-13
31.6 Q Cycle Activity.......................................................................................................... 31-13
31.7 Instruction Descriptions ............................................................................................. 31-14
31.8 Design Tips .............................................................................................................. 31-136
31.9 Related Application Notes........................................................................................ 31-137
31.10 Revision History ....................................................................................................... 31-138
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DS39532A-page 31-2 2000 Microchip Technology Inc.
31.1 Introduction
The PIC18CXXX instruction set adds many enhancements to the previous PICmicro instruction
sets, while maintaining an easy migration from these PICmicro instruction sets. Most instructions
are a single program memory word (16-bits), but to address customer requests, some new
instructions have been added that require two program memory locations. The Instruction Set
Summary, shown in Table 31-1, lists the instructions recognized by the Microchip assembler
(MPASM). Table 31-2 gives the instruction description conventions.
Each instruction is divided into an OPCODE that specifies the instruction type and one or more
operands which further specify the operation of the instruction.
The instruction set is highly orthogonal and is grouped into four basic categories:
• Byte-oriented operations
• Bit-oriented operations
• Literal operations
• Control operations
Most byte-oriented instructions have three operands:
1. The File Register (specified by the value of ’f’)
2. The destination of the result (specified by the value of ’d’)
3. The accessed memory (specified by the value of ’a’)
'f' represents a File Register Designator and 'd' represents a Destination Designator. The File
Register Designator specifies which File Register is to be used by the instruction. The access
indicator ’a’ specifies if the BSR selects the bank or if the access bank is used.
The destination designator specifies where the result of the operation is to be placed. If 'd' is zero,
the result is placed in the WREG Register. If 'd' is one, the result is placed in the File Register
specified in the instruction.
All bit-oriented instructions have three operands:
1. The File Register (specified by the value of ’f’)
2. The bit in the File Register (specified by the value of ’b’)
3. The accessed memory (specified by the value of ’a’)
'b' represents a bit field designator that selects the number of the bit affected by the operation,
while 'f' represents the number of the file in which the bit is located. The access indicator ’a’ specifies
if the BSR selects the bank or if the access bank is used.
The literal instructions may use some of the following operands:
• A literal value to be loaded into a File Register (specified by the value of ’k’)
• The desired FSR Register to load the literal value into (specified by the value of ’f’)
• No operand required (specified by the value of ’—’)
The control instructions may use some of the following operands:
• A program memory address (specified by the value of ’n’)
• The mode of the CALL or RETURN instructions (specified by the value of ’s’)
• The mode of the Table Read and Table Write instructions (specified by the value of
’m’)
• No operand required (specified by the value of ’—’)
All instructions are a single word except for three double word instructions. These three instructions
were made double word instructions so that all the required information is available in these
32 bits. In the second word, the 4-MSb’s, are ’1’s. If this second word is executed as an instruction
(by itself), it will execute as a NOP.
All single word instructions are executed in a single instruction cycle, unless a conditional test is
true or the program counter is changed as a result of the instruction. In these cases, the execution
takes two instruction cycles with the additional instruction cycle(s) executed as a NOP.
The double word instructions (that do not modify the PC) execute in two instruction cycles.
One instruction cycle consists of four oscillator periods. Thus, for an oscillator frequency of
4 MHz, the normal instruction execution time is 1 µs. If a conditional test is true or the program
counter is changed as a result of an instruction, the instruction execution time is 2 µs. Two word
branch instructions (if true) would take 3 µs.
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2000 Microchip Technology Inc. DS39532A-page 31-3
Section 31. Instruction Set
Instruction Set
31
31.2 Data Memory Map
The Data Memory Map has 16 banks of 256 bytes. The Instruction Set and architecture allows
operations across all banks (such as MOVFF). A Segment of Bank 0 and a segment of Bank 15
comprise the access bank. See Section 31.2.1 for description of the access bank.
Figure 31-1: The Data Memory Map and the Access Bank
31.2.1 Access Bank
The access bank is an architectural enhancement that is very useful for C compiler code
optimization. The techniques used by the C compiler may also be useful for programs written in
assembly.
This data memory region can be used for
• Intermediate computational values
• Local variables of subroutine
• Faster context saving/switching of variables
• Common variables
• Faster evaluation/control of SFRs (no banking)
The access bank is comprised of 2 segments: Segment 0 and Segment 1. Segment 0 is the RAM
that is mapped in Bank 0. Segment 1 is the SFRs that are mapped in Bank 15. Each Segment
can be of different sizes. The sum of RAM mapped by Segment 0 and Segment 1 is 256 bytes.
When forced in the access bank (a = ’0’), the last address in Segment 0 is followed by the first
address in Segment 1. Segment 1 maps the Special Function Registers so that these registers
can be accessed without any software overhead. This is useful for testing status flags and modifying
control bits.
Bank 0
Bank 1
Bank 14
Bank 15
BSR<3:0> Data Memory Map
= 0000b
= 0001b
= 1110b
= 1111b
00h
FFh
00h
FFh
Access Bank
When the instructions ’a’ bit = 0,
The BSR is ignored and this Access Bank is
used.
The Segment 0 General Purpose RAM is from
Bank 0.
The Segment 1 Special Function Registers is
from Bank 15.
When a = 1,
the BSR is used to specify the RAM
location that the instruction uses.
Bank n Segment 0
Segment 1
Segment 1
Segment 0
Device Dependent
Segment Boundary
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DS39532A-page 31-4 2000 Microchip Technology Inc.
Example 31-1 shows how registers are affected depending on the value of the access bit. Register
MYREG has an 8-bit address. This address specifies the location in the specified bank to
perform the operation. The specified bank is either the bank specified by the Bank Select Register
(BSR) (when a = 1), or the access bank (when a = 0).
Example 31-1:Operation of Destination and Access Bits
;
; The following symbols are defined in the Microchip supplied
; device header file:
;
; For destination bit:
; F = 1 ; Result is placed in File Register
; W = 0 ; Result is placed in WREG Register
;
; For access bit:
; B = 1 ; Register used specified by BSR Bank Register
; A = 0 ; Register used is in Access Bank
;
; MYREG is a register with an 8-bit address value between 0h and FFh.
; For this example we will assign MYREG to bank 5, though it could
; be in any (or all) banks.
;
MOVLB 5 ; BSR points to RAM bank 5
;
; Contents of
; Addr(MYREG) in
; MYREG access bank WREG
; Starting Value 0x7F 0x5A x
;
DECF MYREG, F, B ; 0x7E --- ---
DECF MYREG, F, A ; --- 0x59 ---
;
DECF MYREG, W, B ; --- --- 0x7D
DECF MYREG, W, A ; --- --- 0x58
Note: If the register is specified with the full 12-bit address, the assembler will automatically
force the access bit to a ’0’ (when the address is in the access RAM area) or a
’1’ (for all other addresses).
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2000 Microchip Technology Inc. DS39532A-page 31-5
Section 31. Instruction Set
Instruction Set
31
The common assembler usage should be that all RAM and SFR addresses are 12-bit. This
means that the assembler can determine from the address of the register, whether the access
bit needs to be set or cleared. Example 31-2 shows this, as well as forcing the use of the access
bank.
Example 31-2:Code
;
; The following symbols are defined in the Microchip supplied
; device header file:
;
; For destination bit:
; F = 1 ; Result is placed in File Register
; W = 0 ; Result is placed in WREG Register
;
; For access bit:
; B = 1 ; Register used specified by BSR Bank Register
; A = 0 ; Register used is in Access Bank
;
; Register Name Address
; Loop_CNTR 0x000
; MYREG 0x524
; SFR1 0xA9F
;
MOVLB 5 ; BSR points to RAM bank 5
; Addr 24
; a-bit MYREG Loop_CNTR SFR1 WREG Bank0
; Starting Value --- 0x7F 0x7F 0x7F x 0xA9
;
DECF Loop_CNTR, F ; 0 --- 0x7E --- --- ---
DECF MYREG, F ; 1 0x7E --- --- --- ---
DECF SFR1, F ; 0 --- --- 0x7E --- ---
;
;
DECF Loop_CNTR, W ; 0 --- --- --- 0x7D ---
DECF MYREG, W ; 1 --- --- --- 0x7D ---
DECF SFR1, W ; 0 --- --- --- 0x7D ---
INCF MYREG, F, A ; 0 --- --- --- --- 0xAA
INCF MYREG, W, A ; 0 --- --- --- 0x7F ---
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PIC18C Reference Manual
DS39532A-page 31-6 2000 Microchip Technology Inc.
Table 31-1: PIC18CXXX Instruction Set Summary
Mnemonic,
Operands Description Cycles
16-Bit Instruction Word Status
Affected Notes
MSb LSb
BYTE-ORIENTED FILE REGISTER OPERATIONS
ADDWF
ADDWFC
ANDWF
CLRF
COMF
CPFSEQ
CPFSGT
CPFSLT
DECF
DECFSZ
DCFSNZ
INCF
INCFSZ
INFSNZ
IORWF
MOVF
MOVFF
MOVWF
MULWF
NEGF
RLCF
RLNCF
RRCF
RRNCF
SETF
SUBFWB
SUBWF
SUBWFB
SWAPF
TSTFSZ
XORWF
f, d, a
f, d, a
f, d, a
f, a
f, d, a
f, a
f, a
f, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
f, d, a
fs, fd
f, a
f, a
f, a
f, d, a
f, d, a
f, d, a
f, d, a
f, a
f, d, a
f, d, a
f, d, a
f, d, a
f, a
f, d, a
Add WREG and f
Add WREG and Carry bit to f
AND WREG with f
Clear f
Complement f
Compare f with WREG, skip =
Compare f with WREG, skip >
Compare f with WREG, skip <
Decrement f
Decrement f, Skip if 0
Decrement f, Skip if Not 0
Increment f
Increment f, Skip if 0
Increment f, Skip if Not 0
Inclusive OR WREG with f
Move f
Move fs (source) to 1st word
fd (destination) 2nd word
Move WREG to f
Multiply WREG with f
Negate f
Rotate Left f through Carry
Rotate Left f (No Carry)
Rotate Right f through Carry
Rotate Right f (No Carry)
Set f
Subtract f from WREG with
borrow
Subtract WREG from f
Subtract WREG from f with
borrow
Swap nibbles in f
Test f, skip if 0
Exclusive OR WREG with f
1
1
1
1
1
1 (2 or 3)
1 (2 or 3)
1 (2 or 3)
1
1 (2 or 3)
1 (2 or 3)
1
1 (2 or 3)
1 (2 or 3)
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1 (2 or 3)
1
0010
0010
0001
0110
0001
0110
0110
0110
0000
0010
0100
0010
0011
0100
0001
0101
1100
1111
0110
0000
0110
0011
0100
0011
0100
0110
0101
0101
0101
0011
0110
0001
01da
00da
01da
101a
11da
001a
010a
000a
01da
11da
11da
10da
11da
10da
00da
00da
ffff
ffff
111a
001a
110a
01da
01da
00da
00da
100a
01da
11da
10da
10da
011a
10da
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
C, DC, Z, OV, N
C, DC, Z, OV, N
Z, N
Z
Z, N
None
None
None
C, DC, Z, OV, N
None
None
C, DC, Z, OV, N
None
None
Z, N
Z, N
None
None
None
C, DC, Z, OV, N
C, Z, N
Z, N
C, Z, N
Z, N
None
C, DC, Z, OV, N
C, DC, Z, OV, N
C, DC, Z, OV, N
None
None
Z, N
1, 2, 3
1, 2, 3
1,2, 3
2, 3
1, 2, 3
4
4
2
1, 2, 3, 4
1, 2, 3, 4
1, 2
1, 2, 3, 4
1, 2, 4
1, 2
1, 2
1, 2
2
2
1, 2
1, 2
1, 2
1, 2
1, 2
2
1, 2
1, 2
1, 2
1, 2, 4
2
BIT-ORIENTED FILE REGISTER OPERATIONS
BCF
BSF
BTFSC
BTFSS
BTG
f, b, a
f, b, a
f, b, a
f, b, a
f, d, a
Bit Clear f
Bit Set f
Bit Test f, Skip if Clear
Bit Test f, Skip if Set
Bit Toggle f
1
1
1 (2 or 3)
1 (2 or 3)
1
1001
1000
1011
1010
0111
bbba
bbba
bbba
bbba
bbba
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
ffff
None
None
None
None
None
1, 2
1, 2
3, 4
3, 4
1, 2
Note 1: When a PORT Register is modified as a function of itself (e.g., MOVF PORTB, 1, 0), the value used will be
that value present on the pins themselves. For example, if the data latch is '1' for a pin configured as input and
is driven low by an external device, the data will be written back with a '0'.
2: If this instruction is executed on the TMR0 Register (and, where applicable, d = 1), the prescaler will be cleared
if assigned.
3: If Program Counter (PC) is modified or a conditional test is true, the instruction requires two cycles. The second
cycle is executed as a NOP.
4: Some instructions are 2 word instructions. The second word of these instructions will be executed as a NOP,
unless the first word of the instruction retrieves the information embedded in these 16-bits. This ensures that all
program memory locations have a valid instruction.
5: If the table write starts the write cycle to internal program memory, the write continues until terminated.
39500 18C Reference Manual.book Page 6 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-7
Section 31. Instruction Set
Instruction Set
31
CONTROL OPERATIONS
BC
BN
BNC
BNN
BNOV
BNZ
BOV
BRA
BZ
CALL
CLRWDT
DAW
GOTO
NOP
NOP
POP
PUSH
RCALL
RESET
RETFIE
RETLW
RETURN
SLEEP
n
n
n
n
n
n
n
n
n
n, s
—
—
n
—
—
—
—
n
s
k
s
—
Branch if Carry
Branch if Negative
Branch if Not Carry
Branch if Not Negative
Branch if Not Overflow
Branch if Not Zero
Branch if Overflow
Branch Unconditionally
Branch if Zero
Call subroutine 1st word
2nd word
Clear Watchdog Timer
Decimal Adjust WREG
Go to address 1st word
2nd word
No Operation
No Operation
Pop top of return stack (TOS)
Push top of return stack (TOS)
Relative Call
Software device RESET
Return from interrupt enable
Return with literal in WREG
Return from Subroutine
Go into standby mode
1 (2)
1 (2)
1 (2)
1 (2)
1 (2)
1 (2)
1 (2)
2
1 (2)
2
1
1
2
1
1
1
1
2
1
2
2
2
1
1110
1110
1110
1110
1110
1110
1110
1101
1110
1110
1111
0000
0000
1110
1111
0000
1111
0000
0000
1101
0000
0000
0000
0000
0000
0010
0110
0011
0111
0101
0001
0100
0nnn
0000
110s
kkkk
0000
0000
1111
kkkk
0000
xxxx
0000
0000
1nnn
0000
0000
1100
0000
0000
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
kkkk
kkkk
0000
0000
kkkk
kkkk
0000
xxxx
0000
0000
nnnn
1111
0001
kkkk
0001
0000
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
kkkk
kkkk
0100
0111
kkkk
kkkk
0000
xxxx
0110
0101
nnnn
1111
000s
kkkk
001s
0011
None
None
None
None
None
None
None
None
None
None
TO, PD
C
None
None
None
None
None
None
All
GIE/GIEH,
PEIE/GIEL
None
None
TO, PD
4
Table 31-1: PIC18CXXX Instruction Set Summary (Continued)
Mnemonic,
Operands Description Cycles
16-Bit Instruction Word Status
Affected Notes
MSb LSb
Note 1: When a PORT Register is modified as a function of itself (e.g., MOVF PORTB, 1, 0), the value used will be
that value present on the pins themselves. For example, if the data latch is '1' for a pin configured as input and
is driven low by an external device, the data will be written back with a '0'.
2: If this instruction is executed on the TMR0 Register (and, where applicable, d = 1), the prescaler will be cleared
if assigned.
3: If Program Counter (PC) is modified or a conditional test is true, the instruction requires two cycles. The second
cycle is executed as a NOP.
4: Some instructions are 2 word instructions. The second word of these instructions will be executed as a NOP,
unless the first word of the instruction retrieves the information embedded in these 16-bits. This ensures that all
program memory locations have a valid instruction.
5: If the table write starts the write cycle to internal program memory, the write continues until terminated.
39500 18C Reference Manual.book Page 7 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-8 2000 Microchip Technology Inc.
LITERAL OPERATIONS
ADDLW
ANDLW
IORLW
LFSR
MOVLB
MOVLW
MULLW
RETLW
SUBLW
XORLW
k
k
k
f, k
k
k
k
k
k
k
Add literal and WREG
AND literal with WREG
Inclusive OR literal with WREG
Move literal (12-bit) 1st word
to FSRx 2nd word
Move literal to BSR<3:0>
Move literal to WREG
Multiply literal with WREG
Return with literal in WREG
Subtract WREG from literal
Exclusive OR literal with WREG
1
1
1
2
1
1
1
2
1
1
0000
0000
0000
1110
1111
0000
0000
0000
0000
0000
0000
1111
1011
1001
1110
0000
0001
1110
1101
1100
1000
1010
kkkk
kkkk
kkkk
00ff
kkkk
0000
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
kkkk
C, DC, Z, OV, N
Z, N
Z, N
None
None
None
None
None
C, DC, Z, OV, N
Z, N
DATA MEMORY ↔ PROGRAM MEMORY OPERATIONS
TBLRD*
TBLRD*+
TBLRD*-
TBLRD+*
TBLWT*
TBLWT*+
TBLWT*-
TBLWT+*
Table Read
Table Read with post-increment
Table Read with post-decrement
Table Read with pre-increment
Table Write
Table Write with post-increment
Table Write with post-decrement
Table Write with pre-increment
2
2
2
2
2 (5)
2 (5)
2 (5)
2 (5)
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
1000
1001
1010
1011
1100
1101
1110
1111
None
None
None
None
None
None
None
None
Table 31-1: PIC18CXXX Instruction Set Summary (Continued)
Mnemonic,
Operands Description Cycles
16-Bit Instruction Word Status
Affected Notes
MSb LSb
Note 1: When a PORT Register is modified as a function of itself (e.g., MOVF PORTB, 1, 0), the value used will be
that value present on the pins themselves. For example, if the data latch is '1' for a pin configured as input and
is driven low by an external device, the data will be written back with a '0'.
2: If this instruction is executed on the TMR0 Register (and, where applicable, d = 1), the prescaler will be cleared
if assigned.
3: If Program Counter (PC) is modified or a conditional test is true, the instruction requires two cycles. The second
cycle is executed as a NOP.
4: Some instructions are 2 word instructions. The second word of these instructions will be executed as a NOP,
unless the first word of the instruction retrieves the information embedded in these 16-bits. This ensures that all
program memory locations have a valid instruction.
5: If the table write starts the write cycle to internal program memory, the write continues until terminated.
39500 18C Reference Manual.book Page 8 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-9
Section 31. Instruction Set
Instruction Set
31
31.3 Instruction Formats
Figure 31-2 shows the three general formats that the instructions can have. As can be seen from
the general format of the instructions, the opcode portion of the instruction word varies from 3-bits
to 6-bits of information. This is what allows the Enhanced Instruction Set to have 75 instructions.
All instruction examples use the following format to represent a hexadecimal number:
0xhh
where h signifies a hexadecimal digit.
To represent a binary number:
00000100b
where b is a binary string identifier.
Figure 31-2: General Format for Instructions
Note: Any unused opcode is Reserved. Use of any reserved opcode may cause unexpected
operation.
Byte-oriented File Register operations
15 10 9 8 7 0
d = 0 for result destination to be WREG Register
OPCODE d a f (FILE #)
d = 1 for result destination to be File Register (f)
a = 0 to force Access Bank
Bit-oriented File Register operations
15 12 11 9 8 7 0
OPCODE b (BIT #) a f (FILE #)
b = 3-bit position of bit in File Register (f)
Literal operations
15 8 7 0
OPCODE k (literal)
k = 8-bit immediate value
Byte to Byte move operations (2-word)
15 12 11 0
OPCODE f (Source FILE #)
CALL, GOTO, and Branch operations
15 8 7 0
OPCODE n<7:0> (literal)
n = 20-bit immediate value
a = 1 for BSR to select bank
f = 8-bit File Register address
a = 0 to force Access Bank
a = 1 for BSR to select bank
f = 8-bit File Register address
15 12 11 0
1111 n<19:8> (literal)
15 12 11 0
1111 f (Destination FILE #)
f = 12-bit File Register address
Control operations
Example Instruction
ADDWF MYREG, W, B
MOVFF MYREG1, MYREG2
BSF MYREG, bit, B
MOVLW 0x7F
GOTO label
39500 18C Reference Manual.book Page 9 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-10 2000 Microchip Technology Inc.
Table 31-2: Instruction Description Conventions
Field Description
a RAM access bit
a = 0: RAM location in access bank (BSR Register is ignored)
a = 1: RAM bank is specified by BSR Register
bbb Bit address within an 8-bit File Register (0 to 7)
BSR Bank Select Register. Used to select the current RAM bank.
d Destination select bit;
d = 0: store result in WREG,
d = 1: store result in File Register f.
dest Destination either the WREG Register or the specified register file location
f 8-bit Register file address (0x00 to 0xFF)
fs 12-bit Register file address (0x000 to 0xFFF). This is the source address.
fd 12-bit Register file address (0x000 to 0xFFF). This is the destination address.
k Literal field, constant data or label (may be either an 8-bit, 12-bit or a 20-bit value)
label Label name
mm The mode of the TBLPTR Register for the Table Read and Table Write instructions
Only used with Table Read and Table Write instructions:
* No Change to Register (such as TBLPTR with Table reads and writes)
*+ Post-Increment Register (such as TBLPTR with Table reads and writes)
*- Post-Decrement Register (such as TBLPTR with Table reads and writes)
+* Pre-Increment Register (such as TBLPTR with Table reads and writes)
n The relative address (2’s complement number) for relative branch instructions, or
the direct address for Call/Branch and Return instructions
PRODH Product of Multiply high byte
PRODL Product of Multiply low byte
s Fast Call / Return mode select bit.
s = 0: do not update into/from Shadow Registers
s = 1: certain registers loaded into/from Shadow Registers
u Unused or Unchanged
WREG Working Register (accumulator)
x Don't care (0 or 1)
The assembler will generate code with x = 0. It is the recommended form of use for
compatibility with all Microchip software tools.
TBLPTR 21-bit Table Pointer (points to a Program Memory location)
TABLAT 8-bit Table Latch
TOS Top of Stack
INDF Any one of the indirect addressing registers, such as INDF0, INDF1, or INDF2
FSR Any one of the file select register pairs, such as FSR0H:FSR0L, FSR1H:FSR1L, or
FSR2H:FSR2L
39500 18C Reference Manual.book Page 10 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-11
Section 31. Instruction Set
Instruction Set
31
Table 31-3: Indirect Addressing Symbols
PC Program Counter
PCL Program Counter Low Byte
PCH Program Counter High Byte
PCLATH Program Counter High Byte Latch
PCLATU Program Counter Upper Byte Latch
GIE Global Interrupt Enable bit
WDT Watchdog Timer
TO Time-out bit
PD Power-down bit
C,DC,
Z,OV,N
ALU status bits Carry, Digit Carry, Zero, Overflow, Negative
[ ] Optional
( ) Contents of
→ Assigned to
< > Register bit field
∈ In the set of
italics User defined term (font is courier)
Field Description
*FSRn Selects INDFn Register
*FSRn++ Selects POSTINCn Register
*FSRn-- Selects POSTDECn Register
*(++FSRn) Selects PREINCn Register
*(FSRn+W) Selects PLUSWn Register
Table 31-2: Instruction Description Conventions (Continued)
Field Description
39500 18C Reference Manual.book Page 11 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-12 2000 Microchip Technology Inc.
31.4 Special Function Registers as Source/Destination
The Section 31. Instruction Set’s Orthogonal Instruction Set allows read and write of all File Registers,
including Special Function Registers. The user should be aware of some special situations
which are explained in the following subsections.
31.4.1 STATUS Register as Destination
If an instruction writes to the STATUS Register, the Z, C, DC, OV, and N bits may be set or cleared
as a result of the instruction and overwrite the original data bits. For example, executing CLRF
STATUS will clear Register STATUS, and then set the Z bit leaving 0000 0100b in the register.
31.4.2 Bit Manipulation
All bit manipulation instructions will first read the entire register, operate on the selected bit and
then write the result back to (read-modify-write (R-M-W)) the specified register. The user should
keep this in mind when operating on some Special Function Registers, such as the Port Pin Register.
31.4.3 PCL as Source or Destination
Read, write or read-modify-write (R-M-W) on PCL may have the following results:
Read PCL: PCL → destination ; Reading PCL causes the following
PCH → PCLATH
PCU → PCLATU
Write PCL: 8-bit destination value → PCL ; Writing PCL causes the following
PCLATH → PCH
PCLATU → PCU
Read-Modify-Write: PCL→ ALU operand ; R-M-W of PCL causes the following
PCH → PCLATH
PCU → PCLATU
; PCL data is modified
8-bit result → PCL ; result is written back to PCL
PCLATH → PCH
PCLATU → PCU
Where PCH = program counter high byte (not an addressable register),
PCLATH = Program counter high holding latch,
PCU = program counter upper byte (not an addressable register),
PCLATU = Program counter upper holding latch,
destination = Register file ’f’.
Note: Status bits that are manipulated by the device (including the interrupt flag bits) are
set or cleared in the Q1 cycle, so there is no issue with executing R-M-W instructions
on registers that contain these bits.
39500 18C Reference Manual.book Page 12 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-13
Section 31. Instruction Set
Instruction Set
31
31.5 Fast Register Stack
At times it is desirable to be able to quickly access and return from a function. This function may
be called as a subroutine, or an interrupt routine of the device. To reduce the overhead for
accessing/returning from these functions, the architecture has the ability to save three key registers
in a one deep Register Stack. These registers are:
• WREG Register
• BSR (Bank Select Register) Register
• STATUS Register
The two events that cause these registers to be loaded onto the Fast Register Stack are:
• A fast call (CALL K, fast)(where the fast bit is set (’1’))
• Any interrupt occurs
These Fast Stack Registers are not accessible for reading or writing. When doing the return from
these subroutine, the values can be restored into their registers executing the fast return:
• RETFIE fast (where the fast bit is set (’1’))
• RETURN fast (where the fast bit is set (’1’))
When s (fast) = ’0’, the Fast Register Stack is not used, when s (fast) = ’1’, the Fast Register
Stack is used.
31.6 Q Cycle Activity
Each instruction cycle (Tcy) is comprised of four Q clocks (also called Q cycles). These are
referred to as Q1, Q2, Q3, or Q4. The Q cycles provide the timing/designation for the Decode,
Read, Process Data, Write etc., of each instruction cycle. The Figure 31-3 shows the relationship
of the Q cycles to the instruction cycle.
The four Q cycles that make up an instruction cycle (Tcy) can be generalized as:
Q1: Instruction Decode Cycle or forced No Operation
Q2: Instruction Read Cycle or No Operation
Q3: Process the Data
Q4: Instruction Write Cycle or No Operation
Some actions occur on the edge between the end of one Q cycle and the start of the next Q cycle.
An example would be a Q2-Q3 action. This action occurs on the clock edge between the end of
Q2 cycle and the beginning of the Q3 cycle.
The clock source for the Q cycle is normally the device oscillator clock (TOSC). But the clock
source is software selectable. So the Q cycle may be independent of the device oscillator cycle
(TOSC).
In the full description of each instruction, the detailed Q cycle operation for the instruction will be
shown.
Figure 31-3: Q Cycle Activity
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Tcy1 Tcy2 Tcy3
TOSC
39500 18C Reference Manual.book Page 13 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-14 2000 Microchip Technology Inc.
31.7 Instruction Descriptions
ADDLW Add Literal to WREG
Syntax: [ label ] ADDLW k
Operands: 0 ≤ k ≤ 255
Operation: (WREG) + k → WREG
Status Affected: C, DC, Z, OV, N
Encoding: 0000 1111 kkkk kkkk
Description: The eight bit literal ’k’ is added to the contents of the WREG and the result
is placed in the WREG.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
Write to
WREG
Register
Example1 ADDLW 0x19 ; Add 19h to value in WREG
Before Instruction
WREG = 0x18
C, DC, Z, OV, N = x
After Instruction
WREG = 0x31
C =0
DC = 1
Z =0
OV = 0
N =0
Example 2 ADDLW MYREG ; Add the value of the
; address for MYREG Register
; to WREG
Before Instruction
WREG = 0x60
Address of MYREG † = 0x37
† MYREG is a symbol for a data memory location
C, DC, Z, OV, N = x
After Instruction
WREG = 0x97
C =0
DC = 0
Z =0
OV = 1
N =1
39500 18C Reference Manual.book Page 14 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-15
Section 31. Instruction Set
Instruction Set
31
Example 3 ADDLW HIGH (LU_TABLE) ; Add high byte of address
; LU_TABLE to WREG
Before Instruction
WREG = 0x10
Address of LU_TABLE † = 0x9375
† LU_TABLE is a label for an address in program memory
C, DC, Z, OV, N = x
After Instruction
WREG = 0xA3
C =0
DC = 0
Z =0
OV = 0
N =1
Example 4 ADDLW PCL ; Add value of the address
; of Program Counter Low
; byte (PCL) to WREG
Before Instruction
WREG = 0x02
Address of PCL † = 0xFF8 (only low 8-bits are used)
† PCL is the symbol for the Program Counter low byte location
C, DC, Z, OV, N = x
After Instruction
WREG = 0xFA
C =0
DC = 0
Z =0
OV = 0
N =0
Example 5 ADDLW Offset ; Add the value of symbol
; Offset to WREG
Before Instruction
WREG = 0x10
Offset = 0x02
C, DC, Z, OV, N = x
After Instruction
WREG = 0x12
Offset = 0x02
C =0
DC = 0
Z =0
OV = 0
N =0
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PIC18C Reference Manual
DS39532A-page 31-16 2000 Microchip Technology Inc.
ADDWF Add WREG and f
Syntax: [ label ] ADDWF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (WREG) + (f) → destination
Status Affected: C, DC, Z, OV, N
Encoding: 0010 01da ffff ffff
Description: Add the contents of the WREG Register to the contents of Register 'f'.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 ADDWF FSR0L, 1, 1 ; Add value in WREG to
; value in the
; FSR0H:FSR0L Register
Case 1: Before Instruction
WREG = 0x17
FSR0H:FSR0L = 0x2C2
C, DC, Z, OV, N = x
After Instruction
WREG = 0x17
FSR0H:FSR0L = 0x2D9
C =0
DC = 0
Z =0
OV = 0
N =1
Case 2: Before Instruction
WREG = 0x17
FSR0H:FSR0L = 0x2FF
C, DC, Z, OV, N = x
After Instruction
WREG = 0x17
FSR0H:FSR0L = 0x316
C =0
DC = 0
Z =0
OV = 0
N =0
39500 18C Reference Manual.book Page 16 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-17
Section 31. Instruction Set
Instruction Set
31
Example 2 ADDWF INDF0, 1, 1 ; Add value in WREG to
; value in the register
; pointed to (addressed)
; by the FSR0H:FSR0L
; Register
Before Instruction
WREG = 0x17
FSR0H:FSR0L = 0x6C2
Contents of Address (FSR0) = 0x20
C, DC, Z, OV, N = x
After Instruction
WREG = 0x17
FSR0H:FSR0L = 0x6C2
Contents of Address (FSR0) = 0x37
C =0
DC = 0
Z =0
OV = 0
N =0
Example 3 ADDWF INDF0, 1, 0 ; Add value in WREG to
; value in the register
; pointed to (addressed)
; by the FSR0H:FSR0L
; Register
Before Instruction
WREG = 0x17
FSR0H:FSR0L = 0x0C2
Contents of Address (FSR0) = 0x20
C, DC, Z, OV, N = x
After Instruction
WREG = 0x17
FSR0H:FSR0L = 0x0C2
Contents of Address (FSR0) = 0x37
C =0
DC = 0
Z =0
OV = 0
N =0
39500 18C Reference Manual.book Page 17 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-18 2000 Microchip Technology Inc.
Example 4 ADDWF PCL, 1, 1 ; Add the value in WREG to
; the current value in the
; low byte of the program
; counter (PCL)
Case 1: Before Instruction
WREG = 0x10
PCL = 0x37
C, DC, Z, OV, N = x
After Instruction
WREG = 0x10
PCL = 0x47
C =0
DC = 0
Z =0
OV = 0
N =0
Case 2: Before Instruction
WREG = 0x10
PCL = 0xF7
PCH = 0x08
C, DC, Z, OV, N = x
After Instruction
WREG = 0x10
PCL = 0x07
PCH = 0x08
C =1
DC = 0
Z =0
OV = 0
N =0
39500 18C Reference Manual.book Page 18 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-19
Section 31. Instruction Set
Instruction Set
31
Example 5 ADDWF MYREG, 1 ; Add the value in WREG to
; the current value in
; MYREG
; (assembler determines
; that MYREG requires
; access bit to be set)
Case 1: Before Instruction
BSR = 0x01
WREG = 0x10
MYREG = 0x37
C, DC, Z, OV, N = x
After Instruction
BSR = 0x01
WREG = 0x10
MYREG = 0x47
C =0
DC = 0
Z =0
OV = 0
N =0
; In Bank 1
; In Bank 1
Case 2: Before Instruction
BSR = 0x01
WREG = 0x10
MYREG = 0xF7
C, DC, Z, OV, N = x
After Instruction
BSR = 0x01
WREG = 0x10
MYREG = 0x07
C =1
DC = 0
Z =0
OV = 0
N =0
; In Bank 1
; In Bank 1
39500 18C Reference Manual.book Page 19 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-20 2000 Microchip Technology Inc.
ADDWFC Add WREG and Carry bit to f
Syntax: [ label ] ADDWF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (WREG) + (f) + (C) → destination
Status Affected: C, DC, Z, OV, N
Encoding: 0010 00da ffff ffff
Description: Add the contents of the WREG Register and the Carry bit to the contents of
Register 'f'.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 ADDWFC FSR0L, 0, 1 ; Add WREG, C bit, and FSR0L
; value (Destination WREG)
Case 1: Before Instruction
WREG = 0x17
FSR0H:FSR0L = 0x9C2
C =0
DC, Z, OV, N = x
After Instruction
WREG = 0xD9
FSR0H:FSR0L = 0x9C2
C =0
DC = 0
Z =0
OV = 0
N =1
Case 2: Before Instruction
WREG = 0x17
FSR0H:FSR0L = 0x7C2
C =1
DC, Z, OV, N = x
After Instruction
WREG = 0xDA
FSR0H:FSR0L = 0x7C2
C =0
DC = 0
Z =0
OV = 0
N =1
39500 18C Reference Manual.book Page 20 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-21
Section 31. Instruction Set
Instruction Set
31
Example 2 ADDWFC INDF0, 1, 1 ; Add WREG and the Carry
; bit to the value pointed
; to by the FSR0H:FSR0L
; (Destination: File
; Register)
Before Instruction
WREG = 0x17
FSR0H:FSR0L = 0x0C2
Contents of Address (FSR0H:FSR0L) = 0x20
C =0
DC, Z, OV, N = x
After Instruction
WREG = 0x17
FSR0H:FSR0L = 0x0C2
Contents of Address (FSR0H:FSR0L) = 0x37
C =0
DC = 0
Z =0
OV = 0
N =0
Example 3 ADDWFC PCL, 1, 1 ; Add WREG and the Carry
; bit to the PCL Register
Case 1: Before Instruction
WREG = 0x10
PCL = 0x38
C =0
DC, Z, OV, N = x
After Instruction
WREG = 0x10
PCL = 0x48
C =0
DC = 0
Z =0
OV = 0
N =0
Case 2: Before Instruction
WREG = 0x10
PCL = 0xF8
PCH = 0x08
C =0
DC, Z, OV, N = x
After Instruction
WREG = 0x10
PCL = 0x08
PCH = 0x08
C =1
DC = 0
Z =0
OV = 0
N =0
39500 18C Reference Manual.book Page 21 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-22 2000 Microchip Technology Inc.
ANDLW AND Literal with WREG
Syntax: [ label ] ANDLW k
Operands: 0 ≤ k ≤ 255
Operation: (WREG).AND. (k) → W
Status Affected: Z, N
Encoding: 0000 1011 kkkk kkkk
Description: The contents of WREG Register are AND’d with the eight bit literal 'k'. The
result is placed in the WREG Register.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
Write to
WREG
Register
Example 1 ANDLW 0x5F ; And constant to WREG
Before Instruction
WREG = 0xA3
Z, N = x
After Instruction
WREG = 0x03
Z =0
N =0
; 0101 1111 (0x5F)
; 1010 0011 (0xA3)
;---------- ------
; 0000 0011 (0x03)
Example 2 ANDLW MYREG ; And address of MYREG
; to WREG
Before Instruction
WREG = 0xA3
Address of MYREG † = 0x37
Z, N = x
† MYREG is a symbol for a
data memory location
After Instruction
WREG = 0x23
Z =0
N =0
; 0011 0111 (0x37)
; 1010 0011 (0xA3)
;---------- ------
; 0010 0011 (0x23)
39500 18C Reference Manual.book Page 22 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-23
Section 31. Instruction Set
Instruction Set
31
Example 3 ANDLW HIGH
(LU_TABLE)
; And the high byte of
; address LU_TABLE
; with WREG
Before Instruction
WREG = 0xA3
Address of LU_TABLE †
= 0x9375
Z, N = x
† LU_TABLE is a label for an
address in program memory
After Instruction
WREG = 0x83
Z =0
N =1
; 1010 0011 (0xA3)
; 1001 0011 (0x93)
;---------- ------
; 1000 0011 (0x83)
Example 4 ANDLW LOW (LU_TABLE); And the low byte of
; address LU_TABLE
; with WREG
Before Instruction
WREG = 0xA3
Address of LU_TABLE †
= 0x9375
Z, N = x
† LU_TABLE is a label for an
address in program memory
After Instruction
WREG = 0x21
Z =0
N =0
; 1010 0011 (0xA3)
; 0111 0101 (0x75)
;---------- ------
; 0010 0001 (0x21)
39500 18C Reference Manual.book Page 23 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-24 2000 Microchip Technology Inc.
ANDWF AND WREG with f
Syntax: [ label ] ANDWF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (WREG).AND. (f) → destination
Status Affected: Z, N
Encoding: 0001 01da ffff ffff
Description: The contents of the WREG Register are AND’d with the contents of Register
'f'.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 ANDWF REG1, 1, 1 ; And WREG with REG1
Before Instruction
WREG = 0x17
REG1 = 0xC2
Z, N = x
After Instruction
WREG = 0x17
REG1 = 0x02
Z =0
N =0
; 0001 0111 (0x17)
; 1100 0010 (0xC2)
;---------- ------
; 0000 0010 (0x02)
Example 2 ANDWF REG1, 0, 1 ; And WREG with REG1
; (destination WREG)
Before Instruction
WREG = 0x17
REG1 = 0xC2
Z, N = x
After Instruction
WREG = 0x02
REG1 = 0xC2
Z =0
N =0
; 0001 0111 (0x17)
; 1100 0010 (0xC2)
;---------- ------
; 0000 0010 (0x02)
39500 18C Reference Manual.book Page 24 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-25
Section 31. Instruction Set
Instruction Set
31
Example 3 ANDWF INDF0, 1, 1 ; And WREG with value pointed
; by FSR0H:FSR0L (FSR0)
Case 1: Before Instruction
WREG = 0x17
FSR0H:FSR0L
= 0xFC2
Contents of Address
(FSR0) = 0x5A
Z, N = x
After Instruction
WREG = 0x17
FSR0H:FSR0L
= 0xFC2
Contents of Address
(FSR0) = 0x12
Z =0
N =0
; 0001 0111 (0x17)
; 0101 1010 (0x5A)
;---------- ------
; 0001 0010 (0x12)
Case 2: Before Instruction
WREG = 0x00
FSR0H:FSR0L
= 0x4C2
Contents of Address
(FSR0) = 0x5A
Z, N = x
After Instruction
WREG = 0x00
FSR0H:FSR0L
= 0x4C2
Contents of Address
(FSR0) = 0x00
Z =1
N =0
; 0000 0000 (0x00)
; 0101 1010 (0x5A)
;---------- ------
; 0000 0000 (0x00)
39500 18C Reference Manual.book Page 25 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-26 2000 Microchip Technology Inc.
BC Branch if Carry
Syntax: [ label ] BC n
Operands: -128 ≤ f ≤ 127
Operation: If carry bit is ’1’
(PC + 2) + 2n → PC
Status Affected: None
Encoding: 1110 0010 nnnn nnnn
Description: If the Carry bit is ’1’, then the program will branch.
The 2’s complement number ’2n’ (the offset) is added to the PC. Since the
PC will have incremented to fetch the next instruction, the new address will
be (PC+2)+2n. This instruction is then a two-cycle instruction.
Words: 1
Cycles: 1 (2)
Q Cycle Activity:
If Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
No
operation
Example 1 HERE
NOT_C
C_CODE
BC
•
•
GOTO
•
•
C_CODE
MORE_CODE
;
; If C bit is not set
; execute this code.
;
; else if C bit is set
; this code will execute
Case 1: Before Instruction
PC = address HERE
C =0
After Instruction
PC = address NOT_C
Case 2: Before Instruction
PC = address HERE
C =1
After Instruction
PC = address C_CODE
39500 18C Reference Manual.book Page 26 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-27
Section 31. Instruction Set
Instruction Set
31
Example 2 HERE
NO_C
PLUS0
PLUS1
PLUS2
PLUS3
PLUS4
PLUS5
PLUS6
BC
GOTO
•
•
•
•
•
•
•
$ + OFFSET
PROCESS_CODE
; If carry bit is set,
; branch to HERE+OFFSET
Case 1: Before Instruction
PC = address HERE
C =0
After Instruction
PC = address NO_C
Case 2: Before Instruction
PC = address HERE
C =1
After Instruction
PC = address HERE + OFFSET
Example 3 MIN6
MIN5
MIN4
MIN3
MIN2
MIN1
MIN0
HERE
NO_C
•
•
•
•
•
•
•
BC
GOTO
$ - OFFSET
PROCESS_CODE
; If carry bit is set,
; branch to HERE-OFFSET
Case 1: Before Instruction
PC = address HERE
C =0
After Instruction
PC = address NO_C
Case 2: Before Instruction
PC = address HERE
C =1
After Instruction
PC = address HERE - OFFSET
Note: Assembler will convert the specified address label into the offset to be used.
39500 18C Reference Manual.book Page 27 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-28 2000 Microchip Technology Inc.
BCF Bit Clear f
Syntax: [ label ] BCF f, b, a
Operands: 0 ≤ f ≤ 255
0 ≤ b ≤ 7
a ∈ [0,1]
Operation: 0 → f
Status Affected: None
Encoding: 1001 bbba ffff ffff
Description: Bit 'b' in Register 'f' of the specified bank is cleared.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write
Register 'f'
Example 1 BCF MYREG, 7, 1 ; Clear bit 7 in Register
; MYREG
Before Instruction
MYREG = 0xC7
After Instruction
MYREG = 0x47
; 1100 0111
; 0100 0111
39500 18C Reference Manual.book Page 28 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-29
Section 31. Instruction Set
Instruction Set
31
Example 2 BCF INDF0, 3, 0 ; Clear bit 7 in the register
; pointed to by the FSR0
; (FSR0H:FSR0L) Register
Before Instruction
FSR0 = 0x3C2
Contents of Address
(FSR0) = 0x2F
After Instruction
FSR0 = 0x3C2
Contents of Address
(FSR0) = 0x27
; 0010 1111
; 0010 0111
39500 18C Reference Manual.book Page 29 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-30 2000 Microchip Technology Inc.
BN Branch if Negative
Syntax: [ label ] BN n
Operands: -128 ≤ f ≤ 127
Operation: If negative bit is ’1’
(PC + 2) + 2n → PC
Status Affected: None
Encoding: 1110 0110 nnnn nnnn
Description: If the Negative bit is ’1’, then the program will branch.
The 2’s complement number ’2n’ (the offset) is added to the PC. Since the
PC will have incremented to fetch the next instruction, the new address will
be (PC+2)+2n. This instruction is then a two-cycle instruction.
Words: 1
Cycles: 1 (2)
Q Cycle Activity:
If Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
No
operation
Example 1 HERE
NOT_N
N_CODE
BN
•
•
GOTO
•
•
N_CODE
MORE_CODE
; If N bit is not set
; execute this code.
;
;
; else if N bit is set
; this code will execute
Case 1: Before Instruction
PC = address HERE
N =0
After Instruction
PC = address NOT_N
Case 2: Before Instruction
PC = address HERE
N =1
After Instruction
PC = address N_CODE
39500 18C Reference Manual.book Page 30 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-31
Section 31. Instruction Set
Instruction Set
31
Example 2 HERE
NOT_N
PLUS0
PLUS1
PLUS2
PLUS3
PLUS4
PLUS5
PLUS6
BN
GOTO
•
•
•
•
•
•
•
$ + OFFSET
PROCESS_CODE
; If negative bit is set,
; branch to HERE + OFFSET
Case 1: Before Instruction
PC = address HERE
N =0
After Instruction
PC = address NOT_N
Case 2: Before Instruction
PC = address HERE
N =1
After Instruction
PC = address HERE + OFFSET
Example 3 MIN6
MIN5
MIN4
MIN3
MIN2
MIN1
MIN0
HERE
NO_N
•
•
•
•
•
•
•
BN
GOTO $ - OFFSET
PROCESS_CODE
; If negative bit is set,
; branch to HERE - OFFSET
Case 1: Before Instruction
PC = address HERE
N =0
After Instruction
PC = address NO_N
Case 2: Before Instruction
PC = address HERE
N =1
After Instruction
PC = address HERE - OFFSET
Note: Assembler will convert the specified address label into the offset to be used.
39500 18C Reference Manual.book Page 31 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-32 2000 Microchip Technology Inc.
BNC Branch if Not Carry
Syntax: [ label ] BNC n
Operands: -128 ≤ f ≤ 127
Operation: If carry bit is ’0’
(PC + 2) + 2n → PC
Status Affected: None
Encoding: 1110 0011 nnnn nnnn
Description: If the Carry bit is ’0’, then the program will branch.
The 2’s complement number ’2n’ (the offset) is added to the PC. Since the
PC will have incremented to fetch the next instruction, the new address will
be (PC+2)+2n. This instruction is then a two-cycle instruction.
Words: 1
Cycles: 1 (2)
Q Cycle Activity:
If Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
No
operation
Example 1 HERE
CARRY
NC_CODE
BNC
•
•
GOTO
•
•
NC_CODE
MORE_CODE
; If C bit is set
; execute this code.
;
;
; else if C bit is clear
; this code will execute
Case 1: Before Instruction
PC = address HERE
C =0
After Instruction
PC = address NC_CODE
Case 2: Before Instruction
PC = address HERE
C =1
After Instruction
PC = address CARRY
39500 18C Reference Manual.book Page 32 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-33
Section 31. Instruction Set
Instruction Set
31
Example 2 HERE
CARRY
PLUS0
PLUS1
PLUS2
PLUS3
PLUS4
PLUS5
PLUS6
BNC
GOTO
•
•
•
•
•
•
•
$ + OFFSET
PROCESS_CODE
; If carry bit is clear,
; branch to HERE + OFFSET
Case 1: Before Instruction
PC = address HERE
C =0
After Instruction
PC = address HERE + OFFSET
Case 2: Before Instruction
PC = address HERE
C =1
After Instruction
PC = address CARRY
Example 3 MIN6
MIN5
MIN4
MIN3
MIN2
MIN1
MIN0
HERE
CARRY
•
•
•
•
•
•
•
BNC
GOTO
$ - OFFSET
PROCESS_CODE
; If carry bit is clear,
; branch to HERE - OFFSET
Case 1: Before Instruction
PC = address HERE
C =0
After Instruction
PC = address HERE - OFFSET
Case 2: Before Instruction
PC = address HERE
C =1
After Instruction
PC = address CARRY
Note: Assembler will convert the specified address label into the offset to be used.
39500 18C Reference Manual.book Page 33 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-34 2000 Microchip Technology Inc.
BNN Branch if Not Negative
Syntax: [ label ] BNN n
Operands: -128 ≤ f ≤ 127
Operation: If negative bit is ’0’
(PC + 2) + 2n → PC
Status Affected: None
Encoding: 1110 0111 nnnn nnnn
Description: If the Negative bit is ’0’, then the program will branch.
The 2’s complement number ’2n’ (the offset) is added to the PC. Since the
PC will have incremented to fetch the next instruction, the new address will
be (PC+2)+2n. This instruction is then a two-cycle instruction.
Words: 1
Cycles: 1 (2)
Q Cycle Activity:
If Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
No
operation
Example 1 HERE
NEG
POS_CODE
BNN
•
•
GOTO
•
•
POS_CODE
MORE_CODE
; If N bit is set
; execute this code.
;
;
; else if N bit is clear
; this code will execute
Case 1: Before Instruction
PC = address HERE
N =0
After Instruction
PC = address POS_CODE
Case 2: Before Instruction
PC = address HERE
N =1
After Instruction
PC = address NEG
39500 18C Reference Manual.book Page 34 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-35
Section 31. Instruction Set
Instruction Set
31
Example 2 HERE
NEG
PLUS0
PLUS1
PLUS2
PLUS3
PLUS4
PLUS5
PLUS6
BNN
GOTO
•
•
•
•
•
•
•
$ + OFFSET
PROCESS_CODE
; If negative bit is clear,
; branch to HERE + OFFSET
Case 1: Before Instruction
PC = address HERE
N =0
After Instruction
PC = address HERE + OFFSET
Case 2: Before Instruction
PC = address HERE
N =1
After Instruction
PC = address NEG
Example 3 MIN6
MIN5
MIN4
MIN3
MIN2
MIN1
MIN0
HERE
NEG
•
•
•
•
•
•
•
BNN
GOTO
$ - OFFSET
PROCESS_CODE
; If negative bit is clear,
; branch to HERE - OFFSET
Case 1: Before Instruction
PC = address HERE
N =0
After Instruction
PC = address HERE - OFFSET
Case 2: Before Instruction
PC = address HERE
N =1
After Instruction
PC = address NEG
Note: Assembler will convert the specified address label into the offset to be used.
39500 18C Reference Manual.book Page 35 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-36 2000 Microchip Technology Inc.
BNOV Branch if Not Overflow
Syntax: [ label ] BNOV n
Operands: -128 ≤ f ≤ 127
Operation: If overflow bit is ’0’
(PC + 2) + 2n → PC
Status Affected: None
Encoding: 1110 0101 nnnn nnnn
Description: If the Overflow bit is ’0’, then the program will branch.
The 2’s complement number ’2n’ (the offset) is added to the PC. Since the
PC will have incremented to fetch the next instruction, the new address will
be (PC+2)+2n. This instruction is then a two-cycle instruction.
Words: 1
Cycles: 1 (2)
Q Cycle Activity:
If Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
No
operation
Example 1 HERE
OVFL
NOV_CODE
BNOV
•
•
GOTO
•
•
NOV_CODE
MORE_CODE
; If overflow bit is set
; execute this code.
;
;
; else if overflow bit is
; clear this code will
; execute
Case 1: Before Instruction
PC = address HERE
OV = 0
After Instruction
PC = address NOV_CODE
Case 2: Before Instruction
PC = address HERE
OV = 1
After Instruction
PC = address OVFL
39500 18C Reference Manual.book Page 36 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-37
Section 31. Instruction Set
Instruction Set
31
Example 2 HERE
OVFL
PLUS0
PLUS1
PLUS2
PLUS3
PLUS4
PLUS5
PLUS6
BNOV
GOTO
•
•
•
•
•
•
•
$ + OFFSET
PROCESS_CODE
; If overflow bit is clear,
; branch to HERE + OFFSET
Case 1: Before Instruction
PC = address HERE
OV = 0
After Instruction
PC = address HERE + OFFSET
Case 2: Before Instruction
PC = address HERE
OV = 1
After Instruction
PC = address OVFL
Example 3 MIN6
MIN5
MIN4
MIN3
MIN2
MIN1
MIN0
HERE
OVFL
•
•
•
•
•
•
•
BNOV
GOTO
$ - OFFSET
PROCESS_CODE
; If overflow bit is clear,
; branch to HERE - OFFSET
Case 1: Before Instruction
PC = address HERE
OV = 0
After Instruction
PC = address HERE - OFFSET
Case 2: Before Instruction
PC = address HERE
OV = 1
After Instruction
PC = address OVFL
Note: Assembler will convert the specified address label into the offset to be used.
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PIC18C Reference Manual
DS39532A-page 31-38 2000 Microchip Technology Inc.
BNZ Branch if Not Zero
Syntax: [ label ] BNZ n
Operands: -128 ≤ f ≤ 127
Operation: If zero bit is ’0’
(PC + 2) + 2n → PC
Status Affected: None
Encoding: 1110 0001 nnnn nnnn
Description: If the Zero bit is ’0’, then the program will branch.
The 2’s complement number ’2n’ (the offset) is added to the PC. Since the
PC will have incremented to fetch the next instruction, the new address will
be (PC+2)+2n. This instruction is then a two-cycle instruction.
Words: 1
Cycles: 1 (2)
Q Cycle Activity:
If Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
No
operation
Example 1 HERE
ZERO
Z_CODE
BNZ
•
•
GOTO
•
•
Z_CODE
MORE_CODE
; If Z bit is set
; execute this code.
;
;
; else if Z bit is clear
; this code will execute
Case 1: Before Instruction
PC = address HERE
Z =0
After Instruction
PC = address Z_CODE
Case 2: Before Instruction
PC = address HERE
Z =1
After Instruction
PC = address ZERO
39500 18C Reference Manual.book Page 38 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-39
Section 31. Instruction Set
Instruction Set
31
Example 2 HERE
ZERO
PLUS0
PLUS1
PLUS2
PLUS3
PLUS4
PLUS5
PLUS6
BNZ
GOTO
•
•
•
•
•
•
•
$ + OFFSET
PROCESS_CODE
; If zero bit is clear,
; branch to HERE + OFFSET
Case 1: Before Instruction
PC = address HERE
Z =0
After Instruction
PC = address HERE + OFFSET
Case 2: Before Instruction
PC = address HERE
Z =1
After Instruction
PC = address ZERO
Example 3 MIN6
MIN5
MIN4
MIN3
MIN2
MIN1
MIN0
HERE
ZERO
•
•
•
•
•
•
•
BNZ
GOTO
$ - OFFSET
PROCESS_CODE
; If zero bit is clear,
; branch to HERE - OFFSET
Case 1: Before Instruction
PC = address HERE
Z =0
After Instruction
PC = address HERE - OFFSET
Case 2: Before Instruction
PC = address HERE
Z =1
After Instruction
PC = address ZERO
Note: Assembler will convert the specified address label into the offset to be used.
39500 18C Reference Manual.book Page 39 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-40 2000 Microchip Technology Inc.
BOV Branch if Overflow
Syntax: [ label ] BOV n
Operands: -128 ≤ f ≤ 127
Operation: If overflow bit is ’1’
(PC + 2) + 2n → PC
Status Affected: None
Encoding: 1110 0100 nnnn nnnn
Description: If the Overflow bit is ’1’, then the program will branch.
The 2’s complement number ’2n’ (the offset) is added to the PC. Since the
PC will have incremented to fetch the next instruction, the new address will
be (PC+2)+2n. This instruction is then a two-cycle instruction.
Words: 1
Cycles: 1 (2)
Q Cycle Activity:
If Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
No
operation
Example 1 HERE
OVFL
OV_CODE
BOV
•
•
GOTO
•
•
OV_CODE
MORE_CODE
; If OV bit is clear
; execute this code.
;
;
; else if OV bit is set
; this code will execute
Case 1: Before Instruction
PC = address HERE
OV = 0
After Instruction
PC = address OVFL
Case 2: Before Instruction
PC = address HERE
OV = 1
After Instruction
PC = address OV_CODE
39500 18C Reference Manual.book Page 40 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-41
Section 31. Instruction Set
Instruction Set
31
Example 2 HERE
OVFL
PLUS0
PLUS1
PLUS2
PLUS3
PLUS4
PLUS5
PLUS6
BOV
GOTO
•
•
•
•
•
•
•
$ + OFFSET
PROCESS_CODE
; If overflow bit is set,
; branch to HERE + OFFSET
Case 1: Before Instruction
PC = address HERE
OV = 0
After Instruction
PC = address OVFL
Case 2: Before Instruction
PC = address HERE
OV = 1
After Instruction
PC = address HERE + OFFSET
Example 3 MIN6
MIN5
MIN4
MIN3
MIN2
MIN1
MIN0
HERE
OVFL
•
•
•
•
•
•
•
BOV
GOTO
$ - OFFSET
PROCESS_CODE
; If OV bit is set,
; branch to HERE - OFFSET
Case 1: Before Instruction
PC = address HERE
OV = 0
After Instruction
PC = address OVFL
Case 2: Before Instruction
PC = address HERE
OV = 1
After Instruction
PC = address HERE - OFFSET
Note: Assembler will convert the specified address label into the offset to be used.
39500 18C Reference Manual.book Page 41 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-42 2000 Microchip Technology Inc.
BRA Branch Unconditional
Syntax: [ label ] BRA n
Operands: -1024 ≤ f ≤ 1023
Operation: (PC + 2) + 2n → PC
Status Affected: None
Encoding: 1101 0nnn nnnn nnnn
Description: The 2’s complement number ’2n’ (the offset) is added to the PC. Since the
PC will have incremented to fetch the next instruction, the new address will
be (PC+2)+2n. This instruction is a two-cycle instruction.
Words: 1
Cycles: 2
Q Cycle Activity:
If Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
No
operation
Example 1 HERE
THERE
BRA
•
•
•
•
THERE ; Branch to a program memory
; location (THERE)
; this location must be
; < 1023 locations forward
Before Instruction
PC = address HERE
After Instruction
PC = address THERE
39500 18C Reference Manual.book Page 42 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-43
Section 31. Instruction Set
Instruction Set
31
Example 2 THERE
HERE
•
•
•
•
BRA THERE
; Branch to a program memory
; location (THERE)
; this location must be
; < 1024 locations backward
Before Instruction
PC = address HERE
After Instruction
PC = address THERE
Example 3 HERE BRA $ ; Branch to program memory
; location (HERE).
; Infinite Loop
Before Instruction
PC = address HERE
After Instruction
PC = address HERE
Note: Assembler will convert the specified address label into the offset to be used.
39500 18C Reference Manual.book Page 43 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-44 2000 Microchip Technology Inc.
BSF Bit Set f
Syntax: [ label ] BSF f, b, a
Operands: 0 ≤ f ≤ 255
0 ≤ b ≤ 7
a ∈ [0,1]
Operation: 1 → f
Status Affected: None
Encoding: 1000 bbba ffff ffff
Description: Bit 'b' in Register 'f' is set.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write
Register 'f'
Example 1 BSF FLAG_REG, 7 ; Set bit 7 in Register
; FLAG_REG
; (assembler determines
; that FLAG_REG requires
; access bit to be set)
Before Instruction
FLAG_REG = 0x0A
After Instruction
FLAG_REG = 0x8A
; 0000 1010
; 1000 1010
Example 2 BSF INDF0, 3, 0 ; Set bit 3 in the register
; pointed to by the FSR0
; (FSR0H:FSR0L) Register
Before Instruction
WREG = 0x17
FSR0 = 0x0C2
Contents of Address
(FSR0)= 0x20
After Instruction
WREG = 0x17
FSR0 = 0x0C2
Contents of Address
(FSR0) = 0x28
; 0010 0000
; 0010 1000
39500 18C Reference Manual.book Page 44 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-45
Section 31. Instruction Set
Instruction Set
31
BTFSC Bit Test File, Skip if Clear
Syntax: [ label ] BTFSC f, b, a
Operands: 0 ≤ f ≤ 255
0 ≤ b ≤ 7
a ∈ [0,1]
Operation: Skip if (f) = 0
Status Affected: None
Encoding: 1011 bbba ffff ffff
Description: If bit 'b' in Register 'f' is '0' then the next instruction is skipped.
If bit 'b' is '0' then the next instruction (fetched during the current instruction
execution) is discarded, and a NOP is executed instead, making this a
2-cycle instruction.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1 (2 or 3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
No
operation
If skip (2nd cycle):
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by a two word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example 1 HERE
FALSE
TRUE
BTFSC
GOTO
•
•
•
FLAG, 4, 1
PROCESS_CODE
; Test bit 4 of Register
; FLAG, and skip if
; clear
Case 1: Before Instruction
PC = address HERE
FLAG = xxx0 xxxx
After Instruction
Since FLAG<4> = 0
PC = address TRUE
Case 2: Before Instruction
PC = address HERE
FLAG = xxx1 xxxx
After Instruction
Since FLAG<4> = 1
PC = address FALSE
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PIC18C Reference Manual
DS39532A-page 31-46 2000 Microchip Technology Inc.
BTFSS Bit Test File, Skip if Set
Syntax: [ label ] BTFSS f, b, a
Operands: 0 ≤ f ≤ 255
0 ≤ b<7
a ∈ [0,1]
Operation: Skip if (f) = 1
Status Affected: None
Encoding: 1010 bbba ffff ffff
Description: If bit 'b' in Register 'f' is '1' then the next instruction is skipped.
If bit 'b' is '1', then the next instruction (fetched during the current instruction
execution) is discarded and a NOP is executed instead, making this a
2-cycle instruction.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1 (2 or 3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
No
operation
If skip (2nd cycle):
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by a two word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example 1 HERE
FALSE
TRUE
BTFSS
GOTO
•
•
•
FLAG, 4, 0
PROCESS_CODE
; Test bit 4 of Register
; FLAG, and skip if set
Case 1: Before Instruction
PC = address HERE
FLAG = xxx0 xxxx
After Instruction
Since FLAG<4> = 0
PC = address FALSE
Case 2: Before Instruction
PC = address HERE
FLAG = xxx1 xxxx
After Instruction
Since FLAG<4> = 1
PC = address TRUE
39500 18C Reference Manual.book Page 46 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-47
Section 31. Instruction Set
Instruction Set
31
BTG Bit Toggle f
Syntax: [ label ] BTG f, b, a
Operands: 0 ≤ f ≤ 255
0 ≤ b ≤ 7
a ∈ [0,1]
Operation: (f) → f
Status Affected: None
Encoding: 0111 bbba ffff ffff
Description: Bit 'b' in Register 'f' is toggled.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write
Register 'f'
Example 1 BTG LATC, 7, 1 ; Toggle the value of bit 7
; in the LATC Register
Before Instruction
LATC = 0x0A
After Instruction
LATC = 0x8A
; 0000 1010
; 1000 1010
Example 2 BTG INDF0, 3, 1 ; Toggle the value of bit 3
; in the register pointed to
; by the value in the FSR0
; (FSR0H:FSR0L) Register
Before Instruction
FSR0 = 0xAC2
Contents of Address
(FSR0)= 0x20
After Instruction
FSR0 = 0xAC2
Contents of Address
(FSR0)= 0x28
; 0010 0000
; 0010 1000
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PIC18C Reference Manual
DS39532A-page 31-48 2000 Microchip Technology Inc.
BZ Branch if Zero
Syntax: [ label ] BZ n
Operands: -128 ≤ f ≤ 127
Operation: If zero bit is ’1’
(PC + 2) + 2n → PC
Status Affected: None
Encoding: 1110 0000 nnnn nnnn
Description: If the Zero bit is ’1’, then the program will branch.
The 2’s complement number ’2n’ (the offset) is added to the PC. Since the
PC will have incremented to fetch the next instruction, the new address will
be PC+2+2n. This instruction is then a two-cycle instruction.
Words: 1
Cycles: 1 (2)
Q Cycle Activity:
If Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
Write to
PC
No
operation
No
operation
No
operation
No
operation
If No Branch
Q1 Q2 Q3 Q4
Decode Read
literal 'n'
Process
data
No
operation
Example 1 HERE
ZERO
Z_CODE
BZ
•
•
GOTO
•
•
Z_CODE
MORE_CODE
; If zero bit is clear
; execute this code.
;
;
; else if zero bit is set
; this code will execute
Case 1: Before Instruction
PC = address HERE
Z =0
After Instruction
PC = address ZERO
Case 2: Before Instruction
PC = address HERE
Z =1
After Instruction
PC = address Z_CODE
39500 18C Reference Manual.book Page 48 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-49
Section 31. Instruction Set
Instruction Set
31
Example 2 HERE
NZERO
PLUS0
PLUS1
PLUS2
PLUS3
PLUS4
PLUS5
PLUS6
BZ
GOTO
•
•
•
•
•
•
•
$ + OFFSET
PROCESS_CODE
; If zero bit is set,
; branch to HERE + OFFSET
Case 1: Before Instruction
PC = address HERE
Z =0
After Instruction
PC = address NZERO
Case 2: Before Instruction
PC = address HERE
Z =1
After Instruction
PC = address HERE + OFFSET
Example 3 MIN6
MIN5
MIN4
MIN3
MIN2
MIN1
MIN0
HERE
NZERO
•
•
•
•
•
•
•
BZ
GOTO
$ - OFFSET
PROCESS_CODE
; If zero bit is set,
; branch to HERE - OFFSET
Case 1: Before Instruction
PC = address HERE
Z =0
After Instruction
PC = address NZERO
Case 2: Before Instruction
PC = address HERE
Z =1
After Instruction
PC = address HERE - OFFSET
Note: Assembler will convert the specified address label into the offset to be used.
39500 18C Reference Manual.book Page 49 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-50 2000 Microchip Technology Inc.
CALL Call Subroutine
Syntax: [ label ] CALL k, s
Operands: 0 ≤ k ≤ 1048575
s ∈ [0,1]
Operation: (PC)+ 4 → TOS,
k → PC<20:1>,
0 → PC<0>,
if s = 1
(WREG) → WREGS,
(STATUS) → STATUSS,
(BSR) → BSRS
Status Affected: None
Encoding:
1st word (k<7:0>)
2nd word (k<19:8>)
1110
1111
110s
k19kkk
k7kkk
kkkk
kkkk0
kkkk8
Description: Subroutine call of entire 2M byte memory range. First, return address (PC+
4) is pushed onto the return stack (20-bits wide).
If ’s’ = 1, the WREG, STATUS and BSR Registers are also pushed into
their respective Shadow Registers, WREGS, STATUSS and BSRS.
If 's' = 0, no update occurs.
Then the 20-bit value ’k’ is loaded into PC<20:1>. CALL is a two-cycle
instruction.
Words: 2
Cycles: 2
Q Cycle Activity:
1st cycle:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
No
operation
2nd cycle:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
39500 18C Reference Manual.book Page 50 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-51
Section 31. Instruction Set
Instruction Set
31
Example 1 HERE CALL THERE, 1 ; Call subroutine THERE.
; This is a fast call so
; the BSR, WREG, and STATUS
; Registers are forced onto
; the Fast Register Stack
Before Instruction
PC = Address HERE
After Instruction
TOS = Address HERE+4
PC = Address THERE
WREGS = WREG
BSRS = BSR
STATUSS = STATUS
Example 2 HERE CALL THERE, 0 ; Call subroutine THERE.
; This is NOT a fast call
Before Instruction
PC = Address HERE
WREGS = 0x45
BSRS = 0x29
STATUSS = 0x01
After Instruction
TOS = Address HERE+4
PC = Address THERE
WREGS = 0x45 (unchanged)
BSRS = 0x29 (unchanged)
STATUSS = 0x01 (unchanged)
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DS39532A-page 31-52 2000 Microchip Technology Inc.
CLRF Clear f
Syntax: [ label ] CLRF f, a
Operands: 0 ≤ f ≤ 255
a ∈ [0,1]
Operation: 00h → f
1 → Z
Status Affected: Z
Encoding: 0110 101a ffff ffff
Description: The contents of Register 'f' are cleared and the Z bit is set.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write
Register 'f'
Example 1 CLRF FLAG_REG, 1 ; Clear Register FLAG_REG
Before Instruction
FLAG_REG = 0x5A
Z =x
After Instruction
FLAG_REG = 0x00
Z =1
Example 2 CLRF INDF0, 1 ; Clear the register pointed
; to by the FSR0
; (FSR0H:FSR0L) Register
Before Instruction
FSR0 = 0x0C2
Contents of Address
(FSR0) = 0xAA
Z =x
After Instruction
FSR0 = 0x0C2
Contents of Address
(FSR0) = 0x00
Z =1
39500 18C Reference Manual.book Page 52 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-53
Section 31. Instruction Set
Instruction Set
31
CLRWDT Clear Watchdog Timer
Syntax: [ label ] CLRWDT
Operands: None
Operation: 00h → WDT
0 → WDT prescaler count,
1 → TO
1 → PD
Status Affected: TO, PD
Encoding: 0000 0000 0000 0100
Description: CLRWDT instruction clears the Watchdog Timer. It also clears the
postscaler count of the WDT. Status bits TO and PD are set.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
Process
data
Clear
WDT
Counter
Example CLRWDT ; Clear the Watchdog
; Timer count value
Before Instruction
WDT counter = x
WDT postscaler
count = 0
WDT postscaler = 1:128
TO = x
PD = x
After Instruction
WDT counter = 0x00
WDT postscaler
count = 0
WDT postscaler = 1:128
TO = 1
PD = 1
Note: The CLRWDT instruction does not affect the assignment of the WDT postscaler.
39500 18C Reference Manual.book Page 53 Monday, July 10, 2000 6:12 PM
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DS39532A-page 31-54 2000 Microchip Technology Inc.
COMF Complement f
Syntax: [ label ] COMF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (f) → destination
Status Affected: Z, N
Encoding: 0001 11da ffff ffff
Description: The contents of Register 'f' are 1’s complemented.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 COMF REG1, 0, 1 ; Complement the value in
; Register REG1 and place the
; result in the WREG Register
Case 1: Before Instruction
REG1 = 0x13
Z, N = x
After Instruction
REG1 = 0x13
WREG = 0xEC
Z =0
N =1
; 0001 0011
; 1110 1100
Case 2: Before Instruction
REG1 = 0xFF
Z, N = x
After Instruction
REG1 = 0xFF
WREG = 0x00
Z =1
N =0
; 1111 1111
; 0000 0000
Case 3: Before Instruction
REG1 = 0x00
Z, N = x
After Instruction
REG1 = 0x00
WREG = 0xFF
Z =0
N =1
; 0000 0000
; 1111 1111
39500 18C Reference Manual.book Page 54 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-55
Section 31. Instruction Set
Instruction Set
31
Example 2 COMF INDF0, 1, 1 ; Complement the value in the
; register pointed to by the
; FSR0 (FSR0H:FSR0L)
; Register, placing the
; result in that register
Before Instruction
FSR0 = 0xFC2
Contents of Address
(FSR0) = 0xAA
Z, N = x
After Instruction
FSR0 = 0xFC2
Contents of Address
(FSR0) = 0x55
Z =0
N =0
; 1010 1010
; 0101 0101
Example 3 COMF REG1, 1, 1 ; Complement the value in
; Register REG1 and place the
; result in Register REG1
Before Instruction
REG1 = 0xFF
Z, N = x
After Instruction
REG1 = 0x00
Z =1
N =0
; 1111 1111
; 0000 0000
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DS39532A-page 31-56 2000 Microchip Technology Inc.
CPFSEQ Compare f with WREG, Skip if Equal (f = WREG)
Syntax: [ label ] CPFSEQ f, a
Operands: 0 ≤ f ≤ 255
a ∈ [0,1]
Operation: (f) - (WREG)
skip if (f) = (WREG)
Status Affected: None
Encoding: 0110 001a ffff ffff
Description: Compares the contents of Register 'f' to the contents of WREG Register by
performing an unsigned subtraction.
If 'f' = WREG then the fetched instruction is discarded and a NOP is executed
instead, making this a two-cycle instruction.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1 (2 or 3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
No
operation
If skip (2nd cycle):
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by a two word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
39500 18C Reference Manual.book Page 56 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-57
Section 31. Instruction Set
Instruction Set
31
Example HERE
NEQUAL
EQUAL
CPFSEQ
GOTO
•
•
•
FLAG, 1
PROCESS_CODE
; Compare the value in
; Register FLAG to the
; WREG Register and skip
; the next program memory
; location if they are
; equal
Case 1: Before Instruction
PC = address HERE
FLAG = 0x5A
WREG = 0x5A
After Instruction
PC = address EQUAL
; FLAG - WREG = 0x00
; The two values were
; Equal
Case 2: Before Instruction
PC = address HERE
FLAG = 0xA5
WREG = 0x5A
After Instruction
PC = address NEQUAL
; FLAG - WREG = 0x4B
; The two values were
; Not Equal
39500 18C Reference Manual.book Page 57 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-58 2000 Microchip Technology Inc.
CPFSGT Compare f with WREG, Skip if Greater Than (f > WREG)
Syntax: [ label ] CPFSGT f, a
Operands: 0 ≤ f ≤ 255
a ∈ [0,1]
Operation: (f) - (WREG)
skip if (f) > (WREG); (unsigned comparison)
Status Affected: None
Encoding: 0110 010a ffff ffff
Description: Compares the contents of data memory location 'f' to the contents of
WREG Register by performing an unsigned subtraction.
If 'f' > WREG then the fetched instruction is discarded and a NOP is executed
instead, making this a two-cycle instruction.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1 (2 or 3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
No
operation
If skip (2nd cycle):
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by a two word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
39500 18C Reference Manual.book Page 58 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-59
Section 31. Instruction Set
Instruction Set
31
Example HERE
NGT
GT
CPFSGT
GOTO
•
•
•
FLAG, 1
PROCESS_CODE
; Compare the value in
; Register FLAG to the
; WREG Register and skip
; the next program memory
; location if
; FLAG > WREG
Case 1: Before Instruction
PC = address HERE
FLAG = 0x5A
WREG = 0x5A
After Instruction
PC = address NGT
; FLAG - WREG = 0x00
; The two values were
; Equal (Not Greater Than)
Case 2: Before Instruction
PC = address HERE
FLAG = 0xA5
WREG = 0x5A
After Instruction
PC = address GT
; FLAG - WREG = 0x4B
; FLAG > WREG, Skip
; the next instruction
39500 18C Reference Manual.book Page 59 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-60 2000 Microchip Technology Inc.
CPFSLT Compare f with WREG, Skip if Less Than (f < WREG)
Syntax: [ label ] CPFSLT f, a
Operands: 0 ≤ f ≤ 255
a ∈ [0,1]
Operation: (f) - (WREG); (unsigned comparison)
skip if (f) < (WREG)
Status Affected: None
Encoding: 0110 000a ffff ffff
Description: Compares the contents of data memory location 'f' to the contents of
WREG Register by performing an unsigned subtraction.
If 'f' < WREG then the fetched instruction is discarded and an NOP is executed
instead making this a two-cycle instruction.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1 (2 or 3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
No
operation
If skip (2nd cycle):
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by a two word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
39500 18C Reference Manual.book Page 60 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-61
Section 31. Instruction Set
Instruction Set
31
Example HERE
NLT
LT
CPFSLT
GOTO
•
•
•
FLAG, 1
PROCESS_CODE
; Compare the value in
; Register FLAG to the
; WREG Register and skip
; the next program memory
; location if
; FLAG < WREG
Case 1: Before Instruction
PC = address HERE
FLAG = 0x5A
WREG = 0x5A
After Instruction
PC = address NLT
; FLAG - WREG = 0x00
; the two values were
; Equal (Not less than)
Case 2: Before Instruction
PC = address HERE
FLAG = 0x5A
WREG = 0xA5
After Instruction
PC = address LT
; FLAG - WREG = 0x4B
; FLAG < WREG, Skip
; the next instruction
39500 18C Reference Manual.book Page 61 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-62 2000 Microchip Technology Inc.
DAW Decimal Adjust WREG Register
Syntax: [ label ] DAW
Operands: None
Operation: If [WREG<3:0> >9] or [DC = 1] then
(WREG<3:0>) + 6 → WREG<3:0>;
else
(WREG<3:0>) → WREG<3:0>;
If [WREG<7:4> >9] or [C = 1] then
(WREG<7:4>) + 6 → WREG<7:4>;
else
(WREG<7:4>) → WREG<7:4>;
Status Affected: C
Encoding: 0000 0000 0000 0111
Description: DAW adjusts the eight bit value in WREG resulting from the earlier addition
of two variables (each in packed BCD format) and produces a correct
packed BCD result.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register
REG
Process
data
Write to
REG
39500 18C Reference Manual.book Page 62 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-63
Section 31. Instruction Set
Instruction Set
31
Example HERE DAW ; Decimal Adjust WREG
Case 1: Before Instruction
WREG = 0x0F
C =x
After Instruction
WREG = 0x15
C =0
; 0x0F is 15 decimal
Case 2: Before Instruction
WREG = 0x68
C =x
After Instruction
PC = 0x04
C =1
; 0x68 is 104 decimal
; Carry to indicate
; decimal rollover
Case 3: Before Instruction
WREG = C6
C =x
After Instruction
PC = 98
C =1
;
; 0xC6 is 198 decimal
; Carry to indicate
; decimal rollover
39500 18C Reference Manual.book Page 63 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-64 2000 Microchip Technology Inc.
DECF Decrement f
Syntax: [ label ] DECF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (f) - 1 → destination
Status Affected: C, DC, Z, OV, N
Encoding: 0000 01da ffff ffff
Description: Decrement the contents of Register 'f'.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 DECF CNT, 1, 1 ; Decrement Register CNT
Before Instruction
CNT = 0x01
C, DC, OV, N = x
Z =0
After Instruction
CNT = 0x00
C =0
DC = 0
Z =1
OV = 0
N =0
39500 18C Reference Manual.book Page 64 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-65
Section 31. Instruction Set
Instruction Set
31
Example 2 DECF INDF0, 1, 1 ; Decrement the register
; pointed to by the FSR
; (FSR0H:FSR0L) Register
Before Instruction
FSR0 = 0x1C2
Contents of Address
(FSR0) = 0x01
C, DC, OV, N = x
Z =0
After Instruction
FSR0 = 0x1C2
Contents of Address
(FSR0) = 0x00
C =0
DC = 0
Z =1
OV = 0
N =0
Example 3 DECF CNT, 0, 1 ; Decrement Register CNT
; WREG is destination
Before Instruction
CNT = 0x10
WREG = x
Z =0
After Instruction
CNT = 0x10
WREG = 0x0F
C =0
DC = 1
Z =0
OV = 0
N =0
39500 18C Reference Manual.book Page 65 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-66 2000 Microchip Technology Inc.
DECFSZ Decrement f, Skip if 0
Syntax: [ label ] DECFSZ f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]]
a ∈ [0,1]
Operation: (f) - 1 → destination; skip if result = 0
Status Affected: None
Encoding: 0010 11da ffff ffff
Description: The contents of Register 'f' are decremented. If the result is 0, then the
next instruction (fetched during the current instruction execution) is discarded
and a NOP is executed instead, making this a 2 cycle instruction.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1 (2 or 3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
If skip (2nd cycle):
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2 word instruction
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
39500 18C Reference Manual.book Page 66 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-67
Section 31. Instruction Set
Instruction Set
31
Example HERE
CONTINUE
DECFSZ
GOTO
•
•
CNT, 1, 1
LOOP
; Decrement Register CNT,
; if CNT then equals 0
; skip the next
; instruction
Case 1: Before Instruction
PC = address HERE
CNT = 0x01
After Instruction
CNT = 0x00
PC = address CONTINUE
Case 2: Before Instruction
PC = address HERE
CNT = 0x02
After Instruction
CNT = 0x01
PC = address HERE + 2
39500 18C Reference Manual.book Page 67 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-68 2000 Microchip Technology Inc.
DCFSNZ Decrement f, Skip if Not 0
Syntax: [ label ] DCFSNZ f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]]
a ∈ [0,1]
Operation: (f) - 1 → destination; skip if result ≠ 0
Status Affected: None
Encoding: 0100 11da ffff ffff
Description: The contents of Register 'f' are decremented. If the result is not 0, then
the next instruction (fetched during the current instruction execution) is
discarded and a NOP is executed instead, making this a 2-cycle instruction.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1 (2 or 3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
If skip (2nd cycle):
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2 word instruction
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
39500 18C Reference Manual.book Page 68 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-69
Section 31. Instruction Set
Instruction Set
31
Example HERE
CONTINUE
DCFSNZ
GOTO
•
•
CNT, 1, 1
LOOP
; Decrement Register CNT,
; if CNT does not equal 0
; skip the next instruction
Case 1: Before Instruction
PC = address HERE
CNT = 0x01
After Instruction
CNT = 0x00
PC = address HERE + 2
Case 2: Before Instruction
PC = address HERE
CNT = 0x02
After Instruction
CNT = 0x01
PC = address CONTINUE
39500 18C Reference Manual.book Page 69 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-70 2000 Microchip Technology Inc.
GOTO Unconditional Branch
Syntax: [ label ] GOTO k
Operands: 0 ≤ k ≤ 1048575
Operation: k → PC<20:1>
0 → PC<0>,
Status Affected: None
Encoding:
1st word (k<7:0>)
2nd word (k<19:8>)
1110
1111
1111
k19kkk
k7kkk
kkkk
kkkk0
kkkk8
Description: GOTO allows an unconditional branch anywhere within the entire 2M byte
memory range. The 20-bit immediate value ’k’ is loaded into PC<20:1>.
GOTO is always a two-cycle instruction.
Words: 2
Cycles: 2
Q Cycle Activity:
1st cycle:
Q1 Q2 Q3 Q4
Decode Read
literal
'k'<7:0>
Process
data
No
operation
2nd cycle:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
39500 18C Reference Manual.book Page 70 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-71
Section 31. Instruction Set
Instruction Set
31
Example 1 HERE GOTO THERE ; Goto address THERE
After Instruction
PC = Address THERE
Example 2 HERE GOTO $-2 ; GOTO address HERE - 2
After Instruction
PC = Address HERE -2
Example 3 HERE GOTO $ ; GOTO address HERE
; (infinite loop)
After Instruction
PC = Address HERE
Example 4 HERE GOTO HERE ; GOTO address HERE
; (infinite loop)
After Instruction
PC = Address HERE
39500 18C Reference Manual.book Page 71 Monday, July 10, 2000 6:12 PM
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DS39532A-page 31-72 2000 Microchip Technology Inc.
INCF Increment f
Syntax: [ label ] INCF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (f) + 1 → destination
Status Affected: C, DC, Z, OV, N
Encoding: 0010 10da ffff ffff
Description: The contents of Register 'f' are incremented.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 INCF CNT,1, 1 ; Increment Register CNT
Before Instruction
CNT = 0xFF
C, DC, Z, OV, N = x
After Instruction
CNT = 0x00
C =1
DC = 1
Z =1
OV = 0
N =0
; 1111 1111
; 0000 0000
39500 18C Reference Manual.book Page 72 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-73
Section 31. Instruction Set
Instruction Set
31
Example 2 INCF INDF0, 1, 1 ; Increment Register
; indirectly
; (FSR0 (FSR0H:FSR0L) points
; to address to increment)
Before Instruction
FSR0 = 0x0C2
Contents of Address
(FSR0) = 0xFF
C, DC, Z, OV, N = x
After Instruction
FSR0 = 0x0C2
Contents of Address
(FSR0) = 0x00
C =1
DC = 1
Z =1
OV = 0
N =0
; 1111 1111
; 0000 0000
Example 3 INCF CNT, 0, 1 ; Increment Register CNT
; place result in WREG
Before Instruction
CNT = 0x10
WREG = x
C, DC, OV, N = x
Z =0
After Instruction
CNT = 0x10
WREG = 0x11
C =0
DC = 0
Z =0
OV = 0
N =0
; 0001 0000
; 0001 0001
39500 18C Reference Manual.book Page 73 Monday, July 10, 2000 6:12 PM
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DS39532A-page 31-74 2000 Microchip Technology Inc.
INCFSZ Increment f, Skip if 0
Syntax: [ label ] INCFSZ f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (f) + 1 → destination, skip if result = 0
Status Affected: None
Encoding: 0011 11da ffff ffff
Description: The contents of Register 'f' are incremented. If the result is 0, then the next
instruction (fetched during the current instruction execution) is discarded
and a NOP is executed instead, making this a 2-cycle instruction.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1 (2 or 3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
If skip (2nd cycle):
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2 word instruction
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
39500 18C Reference Manual.book Page 74 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-75
Section 31. Instruction Set
Instruction Set
31
Example 1 HERE
NZERO
ZERO
INCFSZ
GOTO
•
•
CNT, 1, 1
LOOP
; Increment Register CNT,
; if CNT then equals 0
; skip the next
; instruction
Case 1: Before Instruction
PC = address HERE
CNT = 0xFF
After Instruction
CNT = 0x00
PC = address ZERO
Case 2: Before Instruction
PC = address HERE
CNT = 0x00
After Instruction
CNT = 0x01
PC = address NZERO
Example 2 HERE
NZERO
ZERO
INCFSZ
GOTO
•
•
•
CNT, 1, 0
LOOP
; Increment Register CNT,
; if CNT equals 0
; skip the next
; instruction
Case 1: Before Instruction
PC = address HERE
CNT = 0xFF ; In access bank
After Instruction
CNT = 0x00
PC = address ZERO
Case 2: Before Instruction
PC = address HERE
CNT = 0x00 ; In access bank
After Instruction
CNT = 0x01
PC = address NZERO
39500 18C Reference Manual.book Page 75 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-76 2000 Microchip Technology Inc.
INFSNZ Increment f, Skip if Not 0
Syntax: [ label ] INFSNZ f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (f) + 1 → destination, skip if result ≠ 0
Status Affected: None
Encoding: 0100 10da ffff ffff
Description: The contents of Register 'f' are incremented. If the result is not 0, then the
next instruction (fetched during the current instruction execution) is discarded
and a NOP is executed instead, making this a 2-cycle instruction.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1 (2 or 3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
If skip (2nd cycle):
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by 2 word instruction
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
39500 18C Reference Manual.book Page 76 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-77
Section 31. Instruction Set
Instruction Set
31
Example 1 HERE
ZERO
NZERO
INFSNZ
GOTO
•
•
CNT, 1, 1
LOOP
; Increment Register CNT,
; if CNT does not equal 0
; skip the next instruction
Case 1: Before Instruction
PC = address HERE
CNT = 0xFF
After Instruction
CNT = 0x00
PC = address ZERO
Case 2: Before Instruction
PC = address HERE
CNT = 0x00
After Instruction
CNT = 0x01
PC = address NZERO
Example 2 HERE
ZERO
NZERO
INFSNZ
GOTO
•
•
•
CNT, 1, 0
LOOP
; Increment Register CNT,
; if CNT does not equal 0
; skip the next instruction
Case 1: Before Instruction
PC = address HERE
CNT = 0xFF ; In access bank
After Instruction
CNT = 0x00
PC = address ZERO
Case 2: Before Instruction
PC = address HERE
CNT = 0x00 ; In access bank
After Instruction
CNT = 0x01
PC = address NZERO
39500 18C Reference Manual.book Page 77 Monday, July 10, 2000 6:12 PM
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DS39532A-page 31-78 2000 Microchip Technology Inc.
IORLW Inclusive OR Literal with WREG
Syntax: [ label ] IORLW k
Operands: 0 ≤ k ≤ 255
Operation: (WREG).OR. k → WREG
Status Affected: Z, N
Encoding: 0000 1001 kkkk kkkk
Description: The contents of the WREG Register is OR’d with the eight bit literal 'k'. The
result is placed in the WREG Register.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
Write to
WREG
Register
Example 1 IORLW 0x35 ; bit wise OR 35h with the
; WREG Register
Before Instruction
WREG = 0x9A
Z, N = x
After Instruction
WREG = 0xBF
Z =0
N =1
; 0011 0101 (35h)
; 1001 1010
; 1011 1111
Example 2 IORLW MYREG ; bit wise OR the value of
; the address of Register
; MYREG with the WREG
; Register
Before Instruction
WREG = 0x9A
Address of MYREG †
= 0x37
† MYREG is a symbol for a
data memory location
Z, N = x
After Instruction
WREG = 0xBF
Z =0
N =1
;
; 1001 1010
;
; 0011 0111
; 1011 1111
39500 18C Reference Manual.book Page 78 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-79
Section 31. Instruction Set
Instruction Set
31
Example 3 IORLW HIGH (LU_TABLE) ; bit wise OR the value of
; the high byte of address
; LU_TABLE with the WREG
; Register
Before Instruction
WREG = 0x9A
Address of LU_TABLE †
= 0x9375
† LU_TABLE is a label for an
address in program memory
Z, N = x
After Instruction
WREG = 0x9B
Z =0
N =1
; 1001 1010
; 1001 0011 (93h)
; 1001 1011
Example 4 IORLW 0x00 ; bit wise OR 00h with the
; WREG Register
Before Instruction
WREG = 0x00
Z, N = x
After Instruction
WREG = 0x00
Z =1
N =0
; 0000 0000 (literal)
; 0000 0000
; 0000 0000
39500 18C Reference Manual.book Page 79 Monday, July 10, 2000 6:12 PM
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DS39532A-page 31-80 2000 Microchip Technology Inc.
IORWF Inclusive OR WREG with f
Syntax: [ label ] IORWF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (WREG).OR. (f) → destination
Status Affected: Z, N
Encoding: 0001 00da ffff ffff
Description: Inclusive OR the WREG Register with the contents of Register 'f'.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 IORWF INDF0, 1, 1 ; Comment
Before Instruction
WREG = 0x17
FSR0 = 0xDC2
Contents of Address
(FSR0) = 0x30
Z, N = x
After Instruction
WREG = 0x17
FSR0 = 0xDC2
Contents of Address
(FSR0) = 0x37
Z =0
N =0
; 0001 0111
; 0011 0000
; 0011 0111
39500 18C Reference Manual.book Page 80 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-81
Section 31. Instruction Set
Instruction Set
31
Example 2 IORWF RESULT, 1, 1 ; bit wise OR the WREG
; Register with the
; Register RESULT.
Case 1: Before Instruction
RESULT = 0x13
WREG = 0x91
Z, N = x
After Instruction
RESULT = 0x93
WREG = 0x91
Z =0
N =1
; 0001 0011
; 1001 0001
; 1001 0011
Case 2: Before Instruction
RESULT = 0x00
WREG = 0x00
Z, N = x
After Instruction
RESULT = 0x00
WREG = 0x00
Z =1
N =0
; 0000 0000
; 0000 0000
; 0000 0000
Example 3 IORWF RESULT, 1, 0 ; bit wise OR the WREG
; Register with the
; register in the Access
; bank at address of RESULT
; Register.
Case 1: Before Instruction
RESULT = 0x13
(RESULT) in access bank
= 0xC8
WREG = 0x91
Z, N = x
After Instruction
RESULT = 0x13
(RESULT) in access bank
= 0xD9
WREG = 0x91
Z =0
N =1
; 1100 1000
; 1001 0001
; 1101 1001
Case 2: Before Instruction
RESULT = 0x00
(RESULT) in access bank
= 0x11
WREG = 0x00
Z, N = x
After Instruction
RESULT = 0x00
(RESULT) in access bank
= 0x11
WREG = 0x00
Z =0
N =0
; 0001 0001
; 0000 0000
; 0001 0001
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PIC18C Reference Manual
DS39532A-page 31-82 2000 Microchip Technology Inc.
LFSR Load 12-bit Literal to FSR
Syntax: [ label ] LFSR f, k
Operands: 0 ≤ f ≤ 2
0 ≤ k ≤ 4095
Operation: k → FSRx
Status Affected: None
Encoding:
1st word
2nd word
1110
1111
1110
0000
00ff
k7kkk
k11kkk8
kkkk0
Description: The 12-bit literal 'k' is loaded into the File Select Register (FSR Register)
pointed to by 'f':
f = 00 → FSR0
f = 01 → FSR1
f = 10 → FSR2
f = 11 → Reserved
Words: 2
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal
k11:k8
Process
data
Write to
FSRxH
Register
k11:k8
Decode Read
literal k7:k0
Process
data
Write to
FSRxL
Register
k7:k0
Example 1 LFSR 2, 0x123 ; Load the 12-bit FSR2 with
; 123h
Before Instruction
FSR0H = 0x05
FSR0L = 0xA5
FSR1H = 0x05
FSR1L = 0xA5
FSR2H = 0x05
FSR2L = 0xA5
After Instruction
FSR0H = 0x05
FSR0L = 0xA5
FSR1H = 0x05
FSR1L = 0xA5
FSR2H = 0x01
FSR2L = 0x23
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Section 31. Instruction Set
Instruction Set
31
Example 2 LFSR 0, 0xFE3 ; Load the 12-bit FSR0 with
; FE3h
Before Instruction
FSR0H = 0x05
FSR0L = 0xA5
FSR1H = 0x05
FSR1L = 0xA5
FSR2H = 0x05
FSR2L = 0xA5
After Instruction
FSR0H = 0x0F
FSR0L = 0xE3
FSR1H = 0x05
FSR1L = 0xA5
FSR2H = 0x05
FSR2L = 0xA5
Example 3 LFSR 1, 0xFE3 ; Load the 12-bit FSR1 with
; FE3h
Before Instruction
FSR0H = 0x05
FSR0L = 0xA5
FSR1H = 0x05
FSR1L = 0xA5
FSR2H = 0x05
FSR2L = 0xA5
After Instruction
FSR0H = 0x05
FSR0L = 0xA5
FSR1H = 0x0F
FSR1L = 0xE3
FSR2H = 0x05
FSR2L = 0xA5
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MOVF Move f
Syntax: [ label ] MOVF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: f → destination
Status Affected: Z, N
Encoding: 0101 00da ffff ffff
Description: The contents of Register 'f' is moved to a destination dependent upon the
status of the ’d’ and ’a’ bits.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
Write to
WREG
Register
Example 1 MOVF MYREG, 0, 1 ; Copy the contents of
; Register MYREG to the WREG
; Register
Before Instruction
MYREG = 0x22
WREG = 0xFF
Z, N = x
After Instruction
MYREG = 0x22
WREG = 0x22
Z =0
N =0
Example 2 MOVF MYREG, 1, 1 ; Copy the contents of
; Register MYREG to itself
; (affects the status bits)
Before Instruction
MYREG = 0x00
WREG = 0x10
Z, N = x
After Instruction
MYREG = 0x00
WREG = 0x10
Z =1
N =0
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Section 31. Instruction Set
Instruction Set
31
Example 3 MOVF MYREG, 1, 0 ; Copy the contents of
; Register MYREG in the
; access bank to itself
; (affects the status bits)
Case 1: Before Instruction
MYREG = 0x00
WREG = 0x10
Z, N = x
After Instruction
MYREG = 0x00
WREG = 0x10
Z =1
N =0
; In access bank
; In access bank
Case 2: Before Instruction
MYREG = 0x80
WREG = 0x10
Z, N = x
After Instruction
MYREG = 0x80
WREG = 0x10
Z =0
N =1
; In access bank
; In access bank
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DS39532A-page 31-86 2000 Microchip Technology Inc.
MOVFF Move f to f
Syntax: [ label ] MOVFF fs, fd
Operands: 0 ≤ fs ≤ 4095
0 ≤ fd ≤ 4095
Operation: (fs) → fd
Status Affected: None
Encoding:
1st word (source)
2nd word
(destination)
1100
1111
ffff
ffff
ffff
ffff
ffff
ffff
Description: The contents of Source Register 'f
s' are moved to Destination Register 'fd'.
Location of source 'fs' can be anywhere in the 4096 byte data space (000h
to FFFh), and location of destination 'fd' can also be anywhere from 000h to
FFFh.
MOVFF is particularly useful for transferring a data memory location to a
Peripheral Register (such as the transmit buffer or an I/O port) without
affecting the WREG Register.
Note: The MOVFF instruction cannot use the PCL, TOSU, TOSH, and
TOSL as the Destination Register
Words: 2
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Source
Register f
Process
data
No
operation
Decode No
operation
No
operation
Write to
destination
Register f
Example 1 MOVFF REG1, REG2 ; Copy the contents of
; Register REG1 to Register
; REG2
Before Instruction
REG1 = 0x33
REG2 = 0x11
After Instruction
REG1 = 0x33
REG2 = 0x33
Example 2 MOVFF REG2, REG1 ; Copy the contents of
; Register REG2 to Register
; REG1
Before Instruction
REG1 = 0x33
REG2 = 0x11
After Instruction
REG1 = 0x11
REG2 = 0x11
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2000 Microchip Technology Inc. DS39532A-page 31-87
Section 31. Instruction Set
Instruction Set
31
MOVLB Move Literal to low nibble in BSR
Syntax: [ label ] MOVLB k
Operands: 0 ≤ k ≤ 15
Operation: k → BSR<3:0>
Status Affected: None
Encoding: 0000 0001 0000 kkkk
Description: The 4-bit literal 'k' is loaded into the Bank Select Register (BSR).
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
Write
literal ’k’
to BSR
Example 1 MOVLB 5 ; Modify Least Significant
; nibble of BSR Register
; to value 5
Before Instruction
BSR = 0x02
After Instruction
BSR = 0x05
Example 2 MOVLB 9 ; Modify Least Significant
; nibble of BSR Register
; to value 9
Before Instruction
BSR = 0x0F
After Instruction
BSR = 0x09
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DS39532A-page 31-88 2000 Microchip Technology Inc.
MOVLW Move Literal to WREG
Syntax: [ label ] MOVLW k
Operands: 0 ≤ k ≤ 255
Operation: k → WREG
Status Affected: None
Encoding: 0000 1110 kkkk kkkk
Description: The eight bit literal 'k' is loaded into WREG Register.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
Write to
WREG
Register
Example 1 MOVLW 0x5A ; Load the WREG Register
; with the value 5Ah
Before Instruction
WREG = x
After Instruction
WREG = 0x5A
Example 2 MOVLW MYREG ; Load the WREG Register
; with the value of the
; address of MYREG
Before Instruction
WREG = 0x10
Address of MYREG † = 0x37
† MYREG is a symbol for a data memory location
After Instruction
WREG = 0x37
Example 3 MOVLW HIGH (LU_TABLE) ; Load the WREG Register
; with the value of the high
; byte of address LU_TABLE
Before Instruction
WREG = 0x10
Address of LU_TABLE † = 0x9375
† LU_TABLE is a label for an address in program memory
After Instruction
WREG = 0x93
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Section 31. Instruction Set
Instruction Set
31
MOVWF Move WREG to f
Syntax: [ label ] MOVWF f, a
Operands: 0 ≤ f ≤ 255
a ∈ [0,1]
Operation: (WREG) → f
Status Affected: None
Encoding: 0110 111a ffff ffff
Description: Move data from WREG Register to Register 'f'.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
WREG
Register
Process
data
Write
Register 'f'
Example 1 MOVWF OPTION_REG, 1; Copy the value in the WREG
; Register to the
; OPTION_REG Register
Before Instruction
OPTION_REG = 0xFF
WREG = 0x4F
After Instruction
OPTION_REG = 0x4F
WREG = 0x4F
Example 2 MOVWF INDF0, 1 ; Copy the value in the WREG
; Register to the
; FSR0 (FSR0H:FSR0L)
; Register
Before Instruction
WREG = 0x17
FSR0 = 0x5C2
Contents of Address (FSR0) = 0x00
After Instruction
WREG = 0x17
FSR0 = 0x5C2
Contents of Address (FSR0) = 0x17
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DS39532A-page 31-90 2000 Microchip Technology Inc.
MULLW Multiply Literal with WREG
Syntax: [ label ] MULLW k
Operands: 0 ≤ k ≤ 255
Operation: (WREG) x k → PRODH:PRODL
Status Affected: None
Encoding: 0000 1101 kkkk kkkk
Description: An unsigned multiplication is carried out between the contents of WREG
and the 8-bit literal 'k'. The 16-bit result is placed in PRODH:PRODL Register
Pair. PRODH contains the high byte.
WREG is unchanged.
None of the status flags are affected.
Neither an overflow nor carry is possible in this operation. A zero result is
possible but not detected.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
Write
Registers
PRODH:
PRODL
Example 1 MULLW 0xC4 ; Multiply the WREG Register
; with the constant value
; C4h
Before Instruction
WREG = 0xE2
PRODH = x
PRODL = x
After Instruction
WREG = 0xE2
PRODH = 0xAD
PRODL = 0x08
Example 2 MULLW FACTOR ; Multiply the WREG Register
; with the constant value
; FACTOR
Before Instruction
FACTOR = 0xC4
WREG = 0xE2
PRODH = x
PRODL = x
After Instruction
WREG = 0xE2
PRODH = 0xAD
PRODL = 0x08
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Section 31. Instruction Set
Instruction Set
31
MULWF Multiply WREG with f
Syntax: [ label ] MULWF f, a
Operands: 0 ≤ f ≤ 255
a ∈ [0,1]
Operation: (WREG) x (f) → PRODH:PRODL
Status Affected: None
Encoding: 0000 001a ffff ffff
Description: An unsigned multiplication is carried out between the contents of WREG
and the value in Register File Location 'f'. The 16-bit result is placed in the
PRODH:PRODL Register Pair. PRODH contains the high byte.
Both WREG and 'f' are unchanged.
None of the status flags are affected.
Neither an overflow nor carry is possible in this operation. A zero result is
possible but not detected.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write
Registers
PRODH:
PRODL
Example MULWF MYREG, 1 ; Multiple the WREG
; Register with the value
; in MYREG Register
Before Instruction
WREG = 0xE2
MYREG = 0xB5
PRODH = x
PRODL = x
After Instruction
WREG = 0xE2
MYREG = 0xB5
PRODH = 0x9F
PRODL = 0xCA
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DS39532A-page 31-92 2000 Microchip Technology Inc.
NEGF Negate f
Syntax: [ label ] NEGF f, a
Operands: 0 ≤ f ≤ 255
a ∈ [0,1]
Operation: ( f )+1 → (f)
Status Affected: C, DC, Z, OV, N
Encoding: 0110 110a ffff ffff
Description: Location ’f’ is negated using two’s complement. The result is placed in the
data memory location 'f'.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write
Register ’f’
Example 1 NEGF MYREG, 1 ; 2’s complement the value in
; MYREG
Case 1: Before Instruction
MYREG = 0x3A
C, DC, Z, OV, N = x
After Instruction
MYREG = 0xC6
C =0
DC = 0
Z =0
OV = 0
N =1
; 0011 1010
; 1100 0110
Case 2: Before Instruction
MYREG = 0xB0
C, DC, Z, OV, N = x
After Instruction
MYREG = 0x50
C =0
DC = 1
Z =0
OV = 0
N =0
; 1011 0000
; 0101 0000
Case 3: Before Instruction
MYREG = 0x00
C, DC, Z, OV, N = x
After Instruction
MYREG = 0x00
C =1
DC = 1
Z =1
OV = 0
N =0
; 0000 0000
; 0000 0000
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2000 Microchip Technology Inc. DS39532A-page 31-93
Section 31. Instruction Set
Instruction Set
31
NOP No Operation
Syntax: [ label ] NOP
Operands: None
Operation: No operation
Status Affected: None
Encoding:
Default
Used with 2 word
instructions
0000
1111
0000
xxxx
0000
xxxx
0000
xxxx
Description: No operation.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
No
operation
Example HERE NOP ; This instruction cycle
; does nothing
; (No Operation)
Before Instruction
PC = address HERE
After Instruction
PC = address HERE + 2
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DS39532A-page 31-94 2000 Microchip Technology Inc.
POP POP Top of Return Stack
Syntax: [ label ] POP
Operands: None
Operation: (TOS) → bit bucket
Status Affected: None
Encoding: 0000 0000 0000 0110
Description: The Top of Stack (TOS) value is pulled off the return stack and is discarded.
The TOS value then becomes the previous value that was pushed onto the
return stack.
This instruction is provided to enable the user to manage the return stack to
incorporate a software stack.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
POP TOS
value
Example HERE POP ; Modify the Top of Stack
; (TOS). The TOS points to
; what was one level down
Before Instruction
TOS = 0x0031A2
Stack (1 level down) = 0x014332
After Instruction
TOS = 0x014332
PC = HERE + 2
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2000 Microchip Technology Inc. DS39532A-page 31-95
Section 31. Instruction Set
Instruction Set
31
PUSH PUSH Top of Return Stack
Syntax: [ label ] PUSH
Operands: None
Operation: PC → (TOS)
Status Affected: None
Encoding: 0000 0000 0000 0101
Description: The previous Top of Stack (TOS) value is pushed down on the stack. The
PC is pushed onto the top of the return stack.
This instruction is provided to enable the user to manage the return stack to
incorporate a software stack.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode PUSH PC
onto return
stack
No
operation
No
operation
Example HERE PUSH ; PUSH current Program
; Counter value onto the
; hardware stack
Before Instruction
PC = 0x000124
TOS = 0x00345A
After Instruction
PC = 0x000126
TOS = 0x000124
Stack (1 level down)
= 0x00345A
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DS39532A-page 31-96 2000 Microchip Technology Inc.
RCALL Relative Call
Syntax: [ label ] RCALL n
Operands: -1024 ≤ n ≤ 1023
Operation: (PC + 2) → TOS,
(PC + 2) + 2n → PC
Status Affected: None
Encoding: 1101 1nnn nnnn nnnn
Description: Subroutine call with a jump up to 1K from the current location. First, the
return address (PC+2) is pushed onto the stack. Then the 2’s complement
number ’2n’ is added to the PC. Since the PC will have incremented to fetch
the next instruction, the new address will be PC+2+2n. This instruction is a
two-cycle instruction.
Words: 1
Cycles: 2
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal ’n’,
Push PC
to stack
Process
Data
Write to
PC
No
operation
No
operation
No
operation
No
operation
Example 1 HERE RCALL Sub1 ; Call a program memory
; location (Sub1)
; this location must be
; < 1024 locations forward or
; > 1025 locations backward
Before Instruction
PC = Address (HERE)
TOS = 0x0031A2
After Instruction
PC = Address (Sub1)
TOS = Address (HERE + 2)
Stack (1 level down)
= 0x0031A2
Example 2 HERE
PLUS0
PLUS1
PLUS2
PLUS3
PLUS4
PLUS5
PLUS6
RCALL
•
•
•
•
•
•
•
$ + OFFSET ; Call to HERE+OFFSET
Before Instruction
PC = address HERE
After Instruction
PC = address HERE + OFFSET
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Section 31. Instruction Set
Instruction Set
31
Example 3 MIN6
MIN5
MIN4
MIN3
MIN2
MIN1
MIN0
HERE
NEXT
•
•
•
•
•
•
•
RCALL $ - OFFSET
; Call to HERE-OFFSET
Before Instruction
PC = address HERE
After Instruction
PC = address HERE - OFFSET
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RESET Reset Device
Syntax: [ label ] RESET
Operands: None
Operation: Force all registers and flag bits
that are affected by a MCLR reset
to their reset condition.
Status Affected: All
Encoding: 0000 0000 1111 1111
Description: This instruction provides a way to execute a software reset.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
Start
reset
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2000 Microchip Technology Inc. DS39532A-page 31-99
Section 31. Instruction Set
Instruction Set
31
Example HERE RESET ; Do a software reset
Before Instruction
PC = address HERE
C, DC, Z, OV, N = x
After Instruction
PC = 0x000000
SFRs = See reset section
GPRs = u (unchanged)
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RETFIE Return from Interrupt
Syntax: [ label ] RETFIE s
Operands: s ∈ [0,1]
Operation: (TOS) → PC,
if IPEN = 0 (compatibility mode)
1 → GIE
if IPEN = 1
GIEH GEIL
1 11 → Invalid
1 01 → GIEL
0 11 → GIEH
0 01 → GIEH
if s = 1
(WREGS) → WREG
(STATUSS) → STATUS
(BSRS) → BSR
if s = 0
(WREGS) → unchanged
(STATUSS) → unchanged
(BSRS) → unchanged
In both cases PCLATU, PCLATH are unchanged.
Status Affected: GIE/GIEH,PEIE/GIEL
Encoding: 0000 0000 0001 000s
Description: Return from Interrupt. Stack is popped and Top of Stack (TOS) is loaded
into the PC. Interrupts are enabled by setting either the high or low priority
global interrupt enable bits (GIEH or GIEL).
If ’s’ = 1, the contents of the Shadow Registers WREGS, STATUSS and
BSRS are loaded into their corresponding registers, WREG, STATUS
and BSR.
If ’s’ = 0, no update of these registers occurs (default).
Words: 1
Cycles: 2
Q Cycle Activity:
1st cycle:
Q1 Q2 Q3 Q4
Decode No
operation
Set GIEH
or GIEL
POP PC
from stack
2nd cycle:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
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Section 31. Instruction Set
Instruction Set
31
Example 1 HERE RETFIE 0 ; Return from interrupt,
; enable interrupts
Before Instruction
PC = address HERE
GIE/GIEH, PEIE/GIEL = x
WREG = x
BSR = x
STATUS = x
After Instruction
PC = TOS
GIE/GIEH, PEIE/GIEL = 1
WREG = unchanged
BSR = unchanged
STATUS = unchanged
Example 2 HERE RETFIE 1 ; Return from interrupt,
; enable interrupts.
; This is a fast return so
; the BSR, WREG, and STATUS
; Registers are restored
; with the values in the
; Fast Register Stack
Before Instruction
PC = address HERE
GIE/GIEH, PEIE/GIEL = x
WREG = x
BSR = x
STATUS = x
After Instruction
PC = TOS
GIE/GIEH, PEIE/GIEL = 1
WREG = WREGS
BSR = BSRS
STATUS = STATUSS
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RETLW Return with Literal in W
Syntax: [ label ] RETLW k
Operands: 0 ≤ k ≤ 255
Operation: k → WREG;
TOS → PC
PCLATU and PCLATH are unchanged
Status Affected: None
Encoding: 0000 1100 kkkk kkkk
Description: The WREG Register is loaded with the eight bit literal 'k'. The program
counter is loaded from the Top of Stack (the return address). The upper and
high address latches (PCLATU:PCLATH) remain unchanged. This is a twocycle
instruction.
Words: 1
Cycles: 2
Q Cycle Activity:
1st cycle:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
POP PC
from stack,
write to
WREG
2nd cycle:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
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Section 31. Instruction Set
Instruction Set
31
Example HERE
TABLE
CALL
•
•
•
ADDWF
RETLW
RETLW
•
•
•
RETLW
TABLE
PC
k1
k2
kn
; WREG contains table offset
; value WREG now has table
; value
; WREG = offset
; Begin table,
; Return with constant in WREG
; End of table
Before Instruction
WREG = x
After Instruction
WREG = value of kx
PC = TOS = Address HERE + 2
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DS39532A-page 31-104 2000 Microchip Technology Inc.
RETURN Return from Subroutine
Syntax: [ label ] RETURN s
Operands: s ∈ [0,1]
Operation: (TOS) → PC
if s = 1
(WREGS) → WREG
(STATUSS) → STATUS
(BSRS) → BSR
if s = 0
(WREGS) → unchanged
(STATUSS) → unchanged
(BSRS) → unchanged
In both cases PCLATU and PCLATH are unchanged
Status Affected: None
Encoding: 0000 0000 0001 001s
Description: Return from subroutine. The stack is popped and the Top of Stack
(TOS) is loaded into the program counter.
If ’s’ = 1, the contents of the Shadow Registers WREGS, STATUSS and
BSRS are loaded into their corresponding registers, WREG, STATUS
and BSR.
If ’s’ = 0, no update of these registers occurs (default).
Words: 1
Cycles: 2
Q Cycle Activity:
1st cycle:
Q1 Q2 Q3 Q4
Decode No
operation
Process
data
POP PC
from stack
2nd cycle:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
Example 1 HERE RETURN 0 ; Return from subroutine.
Before Instruction
PC = address HERE
WREG = x
BSR = x
STATUS = x
After Instruction
PC = TOS
WREG = unchanged
BSR = unchanged
STATUS = unchanged
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2000 Microchip Technology Inc. DS39532A-page 31-105
Section 31. Instruction Set
Instruction Set
31
Example 2 HERE RETURN 1 ; Return from subroutine.
; This is a fast return so
; the BSR, WREG, and STATUS
; Registers are restored
; with the values in the
; Fast Register Stack
Before Instruction
PC = address HERE
WREG = x
BSR = x
STATUS = x
After Instruction
PC = TOS
WREG = WREGS
BSR = BSRS
STATUS = STATUSS
39500 18C Reference Manual.book Page 105 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-106 2000 Microchip Technology Inc.
RLCF Rotate Left f through Carry
Syntax: [ label ] RLCF f, d, a
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
a ∈ [0,1]
Operation: See description below
Status Affected: C, Z, N
Encoding: 0011 01da ffff ffff
Description: The contents of Register 'f' are rotated one bit to the left through the Carry
Flag.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
C Register f
Example 1 RLCF REG1, 0, 1 ; Rotate the value in REG1
; 1 bit position left and
; the carry bit loads into
; bit 0. Then place the
; result in the WREG
; Register
Before Instruction
REG1 = 1110 0110
C = 0
Z, N = x
After Instruction
REG1 = 1110 0110
WREG = 1100 1100
C = 1
Z = 0
N = 1
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2000 Microchip Technology Inc. DS39532A-page 31-107
Section 31. Instruction Set
Instruction Set
31
Example 2 RLF INDF0, 1, 1 ; Rotate the value in the
; register pointed by the
; FSR0 (FSR0H:FSR0L)
; Register 1 bit position
; left and place the result
; back into that register
; Carry loads into bit 0
Case 1: Before Instruction
FSR0 = 0x0C2
Contents of Address
(FSR0) = 0011 1010
C = 1
Z, N = x
After Instruction
FSR0 = 0x0C2
Contents of Address
(FSR0) = 0111 0101
C = 0
Z = 0
N = 0
Case 2: Before Instruction
FSR0 = 0x0C2
Contents of Address
(FSR0) = 1011 1001
C = 0
Z, N = x
After Instruction
FSR0 = 0x0C2
Contents of Address
(FSR0) = 0111 0010
C = 1
Z = 0
N = 0
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PIC18C Reference Manual
DS39532A-page 31-108 2000 Microchip Technology Inc.
RLNCF Rotate Left f (No Carry)
Syntax: [ label ] RLNCF f, d, a
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
a ∈ [0,1]
Operation: See description below
Status Affected: Z, N
Encoding: 0100 01da ffff ffff
Description: The contents of Register 'f' are rotated one bit to the left. The Carry Flag
bit is not affected.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 RLNCF REG1, 0, 1 ; Rotate the value in REG1
; 1 bit position left and
; bit 7 loads into bit 0.
; Then place the result in
; the WREG Register
Before Instruction
REG1 = 1110 0110
Z, N = x
After Instruction
REG1 = 1110 0110
WREG = 1100 1101
Z = 0
N = 1
Register f
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2000 Microchip Technology Inc. DS39532A-page 31-109
Section 31. Instruction Set
Instruction Set
31
Example 2 RLNCF INDF0, 1, 1 ; Rotate the value in the
; register pointed by the
; FSR0 (FSR0H:FSR0L)
; Register 1 bit position left
; and place the result in the
; back into that register.
; bit 7 loads into bit 0.
Case 1: Before Instruction
FSR0 = 0x1C2
Contents of Address
(FSR0) = 0011 1010
Z, N = x
After Instruction
FSR0 = 0x1C2
Contents of Address
(FSR0) = 0111 0100
Z = 0
N = 0
Case 2: Before Instruction
FSR0 = 0x1C2
Contents of Address
(FSR0) = 1011 1001
Z, N = x
After Instruction
FSR0 = 0x1C2
Contents of Address
(FSR0) = 0111 0011
Z = 0
N = 0
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PIC18C Reference Manual
DS39532A-page 31-110 2000 Microchip Technology Inc.
RRCF Rotate Right f through Carry
Syntax: [ label ] RRCF f, d, a
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
a ∈ [0,1]
Operation: See description below
Status Affected: C, Z, N
Encoding: 0011 00da ffff ffff
Description: The contents of Register 'f' are rotated one bit to the right through the Carry
Flag.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
C Register f
Example 1 RRCF REG1, 0, 1 ; Rotate the value in REG1
; 1 bit position right and
; the carry bit loads into
; bit 7. Then place the
; result in the WREG
; Register
Before Instruction
REG1 = 1110 0110
WREG = xxxx xxxx
C = 0
Z, N = x
After Instruction
REG1 = 1110 0110
WREG = 0111 0011
C = 0
Z = 0
N = 0
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Section 31. Instruction Set
Instruction Set
31
Example 2 RRCF INDF0, 1, 1 ; Rotate the value in the
; register pointed by the
; FSR0 (FSR0H:FSR0L)
; Register 1 bit position
; right and place the result
; in the back into that
; register.
; Carry loads into bit 7.
Case 1: Before Instruction
FSR0 = 0x2C2
Contents of Address
(FSR0) = 0011 1010
C =1
Z, N = x
After Instruction
FSR0 = 0x2C2
Contents of Address
(FSR0) = 1001 1101
C =0
Z = 0
N = 1
Case 2: Before Instruction
FSR0 = 0x2C2
Contents of Address
(FSR0) = 0011 1001
C =0
Z, N = x
After Instruction
FSR0 = 0x2C2
Contents of Address
(FSR0) = 0001 1100
C =1
Z =0
N =0
39500 18C Reference Manual.book Page 111 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39532A-page 31-112 2000 Microchip Technology Inc.
RRNCF Rotate Right f (No Carry)
Syntax: [ label ] RRNCF f, d, a
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
a ∈ [0,1]
Operation: See description below
Status Affected: Z, N
Encoding: 0100 00da ffff ffff
Description: The contents of Register 'f' are rotated one bit to the right. The Carry Flag
bit is not affected.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 RRNCF REG1, 0, 1 ; Rotate the value in REG1
; 1 bit position right and
; bit 0 loads into bit 7.
; Then place the result in
; the WREG Register
Before Instruction
REG1 = 1110 0110
WREG = x
Z, N = 1
After Instruction
REG1 = 1110 0110
WREG = 0111 0011
Z =0
N =0
Register f
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Section 31. Instruction Set
Instruction Set
31
Example 2 RRNCF INDF0, 1, 1 ; Rotate the value in the
; register pointed by the
; FSR (FSR0H:FSR0L)
; Register 1 bit
; position right and place
; the result back into
; that register.
; bit 0 loads into bit 7.
Case 1: Before Instruction
FSR0 = 0x3C2
Contents of Address
(FSR0) = 0011 1010
Z, N = x
After Instruction
FSR0 = 0x3C2
Contents of Address
(FSR0) = 0001 1101
Z =0
N =0
Case 2: Before Instruction
FSR0 = 0x3C2
Contents of Address
(FSR0) = 0011 1001
Z, N = x
After Instruction
FSR0 = 0x3C2
Contents of Address
(FSR0) = 1001 1100
Z =0
N =1
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DS39532A-page 31-114 2000 Microchip Technology Inc.
SETF Set f
Syntax: [ label ] SETF f, a
Operands: 0 ≤ f ≤ 255
a ∈ [0,1]
Operation: FFh → f
Status Affected: None
Encoding: 0110 100a ffff ffff
Description: The contents of the specified register are set.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write
Register 'f'
Example 1 SETF FLAG_REG, 1 ; Set all the bits in
; Register FLAG_REG
Before Instruction
FLAG_REG = 0x5A
After Instruction
FLAG_REG = 0xFF
Example 2 SETF INDF0, 1 ; Set all the bits in the
; register pointed to by the
; FSR (FSR0H:FSR0L) Register
Before Instruction
FSR0 = 0x4C2
Contents of Address
(FSR0) = 0xAA
After Instruction
FSR0 = 0x4C2
Contents of Address
(FSR0) = 0xFF
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2000 Microchip Technology Inc. DS39532A-page 31-115
Section 31. Instruction Set
Instruction Set
31
SLEEP Enter SLEEP mode
Syntax: [ label ] SLEEP
Operands: None
Operation: 00h → WDT,
0 → WDT prescaler count,
1 → TO,
0 → PD
Status Affected: TO, PD
Encoding: 0000 0000 0000 0011
Description: The power-down status bit, PD is cleared. Time-out status bit, TO is set.
Watchdog Timer and its prescaler count are cleared.
The processor is put into SLEEP mode with the oscillator stopped.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
Go to
sleep
Example: SLEEP ; Turn off the device
; oscillator. This is the
; lowest power mode
Before Instruction
TO = ?
PD = ?
After Instruction
TO = 1 †
PD = 0
† If WDT causes wake-up, this bit is cleared
Note: The SLEEP instruction does not affect the assignment of the WDT prescaler.
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DS39532A-page 31-116 2000 Microchip Technology Inc.
SUBFWB Subtract f from WREG with borrow
Syntax: [ label ] SUBFWB f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (WREG) – (f) – (C) → destination
Status Affected: C, DC, Z, OV, N
Encoding: 0101 01da ffff ffff
Description: Subtract Register 'f' and carry flag (borrow) from W (2’s complement
method).
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register ’f’
Process
data
Write to
destination
Example 1 SUBFWB MYREG, 1, 1 ; WREG - MYREG - borrow bit
Before Instruction
MYREG = 0x37
WREG = 0x10
C, DC, Z, OV, N = x
C =0
After Instruction
MYREG = 0xA8
WREG = 0x10
C =0
DC = 0
Z =0
OV = 0
N =1
; result is negative
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2000 Microchip Technology Inc. DS39532A-page 31-117
Section 31. Instruction Set
Instruction Set
31
Example 2: SUBFWB MYREG, 1, 1 ; WREG - MYREG - borrow bit
Case 1: Before Instruction
MYREG = 0x03
WREG = 0x02
C =1
DC, Z, OV, N = x
After Instruction
MYREG = 0xFF
WREG = 0x02
C =0
DC = 0
Z =0
OV = 0
N =1 ; result is negative
Case 2: Before Instruction
MYREG = 0x02
WREG = 0x02
C =1
DC, Z, OV, N = x
After Instruction
MYREG = 0x00
WREG = 0x02
C =1
DC = 1
Z =1
OV = 0
N =0
; result is zero
Case 3: Before Instruction
MYREG = 0x01
WREG = 0x03
C =1
DC, Z, OV, N = x
After Instruction
MYREG = 0x02
WREG = 0x03
C =1
DC = 1
Z =0
OV = 0
N =0
; result is positive
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DS39532A-page 31-118 2000 Microchip Technology Inc.
SUBLW Subtract W from Literal
Syntax: [ label ] SUBLW k
Operands: 0 ≤ k ≤ 255
Operation: k - (WREG) → WREG
Status Affected: C, DC, Z, OV, N
Encoding: 0000 1000 kkkk kkkk
Description: The WREG Register is subtracted (2’s complement method) from the eight
bit literal 'k'. The result is placed in the WREG Register.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
Write to
WREG
Register
Example 1 SUBLW OFFSET ; Subtract the value in
; WREG from the constant
; OFFSET
Before Instruction
WREG = 0x37
OFFSET = 0x10
C, DC, Z, OV, N = x
After Instruction
WREG = 0xD9
C =0
DC = 0
Z =0
OV = 0
N =1
; result is negative
39500 18C Reference Manual.book Page 118 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39532A-page 31-119
Section 31. Instruction Set
Instruction Set
31
Example 2: SUBLW 0x02 ; Subtract WREG Register
; from 2h
Case 1: Before Instruction
WREG = 0x01
C, DC, Z, OV, N = x
After Instruction
WREG = 0x01
C =1
DC = 1
Z =0
OV = 0
N =0
; result is positive
Case 2: Before Instruction
WREG = 0x02
C, DC, Z, OV, N = x
After Instruction
WREG = 0x00
C =1
DC = 1
Z =1
OV = 0
N =0
; result is zero
Case 3: Before Instruction
WREG = 0x03
C, DC, Z, OV, N = x
After Instruction
WREG =
0xFF
C =0
DC = 0
Z =0
OV = 0
N =1
; result is negative
39500 18C Reference Manual.book Page 119 Monday, July 10, 2000 6:12 PM
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DS39532A-page 31-120 2000 Microchip Technology Inc.
SUBWF Subtract W from f
Syntax: [ label ] SUBWF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (f) - (WREG) → destination
Status Affected: C, DC, Z, OV, N
Encoding: 0101 11da ffff ffff
Description: Subtract (2’s complement method) WREG Register from Register 'f'.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1: SUBWF REG1, 1, 1 ; Subtract the value in the
; WREG Register from REG1,
; placing the result in REG1
Case 1: Before Instruction
REG1 = 3
WREG = 2
C, DC, Z, OV, N = x
After Instruction
REG1 = 1
WREG = 2
C =1
DC = 1
Z =0
OV = 0
N =0
; result is positive
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Section 31. Instruction Set
Instruction Set
31
Case 2: Before Instruction
REG1 = 2
WREG = 2
C, DC, Z, OV, N = x
After Instruction
REG1 = 0
WREG = 2
C =1
DC = 1
Z =1
OV = 0
N =0
; result is zero
Case 3: Before Instruction
REG1 = 1
WREG = 2
C, DC, Z, OV, N = x
After Instruction
REG1 = 0xFF
WREG = 2
C =0
DC = 0
Z =0
OV = 0
N =1
; result is negative
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DS39532A-page 31-122 2000 Microchip Technology Inc.
SUBWFB Subtract W from f with Borrow
Syntax: [ label ] SUBWFB f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (f) - (WREG) - (C) → destination
Status Affected: C, DC, Z, OV, N
Encoding: 0101 10da ffff ffff
Description: Subtract (2’s complement method) WREG Register from Register 'f' with
borrow.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1: SUBWF REG1, 1, 1 ; Subtract the value in the
; WREG Register from REG1,
; placing the result in REG1
Case 1: Before Instruction
REG1 = 3
WREG = 2
C =1
DC, Z, OV, N = x
After Instruction
REG1 = 1
WREG = 2
C =1
DC = 1
Z =0
OV = 0
N =0
; result is positive
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Section 31. Instruction Set
Instruction Set
31
Case 2: Before Instruction
REG1 = 2
WREG = 2
C =1
DC, Z, OV, N = x
After Instruction
REG1 = 0
WREG = 2
C =1
DC = 1
Z =1
OV = 0
N =0
; result is zero
Case 3: Before Instruction
REG1 = 1
WREG = 2
C =1
DC, Z, OV, N = x
After Instruction
REG1 = 0xFF
WREG = 2
C =0
DC = 0
Z =0
OV = 0
N =1
; result is negative
39500 18C Reference Manual.book Page 123 Monday, July 10, 2000 6:12 PM
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DS39532A-page 31-124 2000 Microchip Technology Inc.
SWAPF Swap Nibbles in f
Syntax: [ label ] SWAPF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (f<3:0>) → destination<7:4>,
(f<7:4>) → destination<3:0>
Status Affected: None
Encoding: 0011 10da ffff ffff
Description: The upper and lower nibbles of Register 'f' are exchanged.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 SWAPF REG1, 0, 1 ; Swap the high and low
; nibble of Register REG1
; and place the result in
; the WREG Register
Before Instruction
REG1 = 0xA5
WREG = x
After Instruction
REG1 = 0xA5
WREG = 0x5A
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Section 31. Instruction Set
Instruction Set
31
Example 2 SWAPF INDF0, 1, 1 ; Swap the high and low
; nibble of register pointed
; to by the FSR
; (FSR0H:FSR0L) Register,
; placing the result back
; into that register
Before Instruction
FSR0 = 0x5C2
Contents of Address
(FSR0) = 0x20
After Instruction
FSR0 = 0x5C2
Contents of Address
(FSR0) = 0x02
Example 3 SWAPF REG1, 1, 1 ; Swap the high and low
; nibble of Register REG1
; placing the result back
; into that register
Before Instruction
REG1 = 0xA5
After Instruction
REG1 = 0x5A
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DS39532A-page 31-126 2000 Microchip Technology Inc.
TBLRD Table Read
Syntax: [ label ] TBLRD[*, *+, *-, or +*]
Operands: 0 ≤ m ≤ 3
Operation: if TBLRD *,
(Prog Mem (TBLPTR)) → TABLAT;
TBLPTR - No Change;
if TBLRD *+,
(Prog Mem (TBLPTR)) → TABLAT;
(TBLPTR) +1 → TBLPTR;
if TBLRD *-,
(Prog Mem (TBLPTR)) → TABLAT;
(TBLPTR) -1 → TBLPTR;
if TBLRD +*,
(TBLPTR) +1 → TBLPTR;
(Prog Mem (TBLPTR)) → TABLAT;
Status Affected: None
Encoding: 0000 0000 0000 10mm * → mm = 00
*+ → mm = 01
*- → mm = 10
+* → mm = 11
Description: This instruction is used to read the contents of Program Memory. To
address the program memory a pointer called Table Pointer (TBLPTR) is
used.
The TBLPTR (a 21-bit pointer) points to each byte in the program memory.
TBLPTR has a 2 Mbyte address range. The LSb of the TBLPTR selects
which byte of the program memory location to access.
TBLPTR[0] = 0: Least Significant byte of Program Memory Word
TBLPTR[0] = 1: Most Significant byte of Program Memory Word
The Program Memory word address is the same as the TBLPTR address,
except that the LSb of TBLPTR (TBLPTR[0]) is always forced to ’0’.
The TBLRD instruction can modify the value of TBLPTR as follows:
• no change
• post-increment
• post-decrement
• pre-increment
Words: 1
Cycles: 2
Q Cycle Activity:
1st cycle:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
No
operation
2nd cycle:
No
operation
No
operation
(Table
Pointer on
Address
bus)
No
operation
No
operation
(OE goes
low)
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2000 Microchip Technology Inc. DS39532A-page 31-127
Section 31. Instruction Set
Instruction Set
31
Example 31-3:Program Memory Contents for Examples
Word Address
(points to low byte)
Data Word Word Address
(points to low byte)
Data Word
MSb LSb MSb LSb
0x00A356 0x12 0x34 0x000000 0x01 0x00
0x00A358 0x56 0x28 0x000002 0x03 0x02
0x00A35A 0xAA 0x55 0x000004 0x05 0x04
0x00A35C 0xFF 0xFE 0x000006 0x07 0x06
0x00A35E 0xB1 0x00 0x000008 0x08 0x07
Example 1 TBLRD*+ ; Read byte addressed by
; TBLPTR, then increment
; TBLPTR
Before Instruction
TABLAT = x
TBLPTR = 0x00A356
Contents of Address (TBLPTR)= 0x34
After Instruction
TABLAT = 0x34
TBLPTR = 0x00A357
Example 2 TBLRD+* ; Increment TBLPTR, then
; Read byte addressed by
; TBLPTR
Before Instruction
TABLAT = x
TBLPTR = 0x00A357
Contents of Address (TBLPTR)= 0x12
Contents of Address (TBLPTR + 1)= 0x28
After Instruction
TABLAT = 0x28
TBLPTR = 0x00A358
Example 3 TBLRD*- ; Read byte addressed by
; TBLPTR, then decrement
; TBLPTR
Before Instruction
TABLAT = x
TBLPTR = 0x00A357
Contents of Address (TBLPTR)= 0x12
After Instruction
TABLAT = 0x12
TBLPTR = 0x00A356
Example 4 TBLRD* ; Read byte addressed by
; TBLPTR. TBLPTR is unchanged
Before Instruction
TABLAT = x
TBLPTR = 0x00A357
Contents of Address (TBLPTR)= 0x12
After Instruction
TABLAT = 0x12
TBLPTR = 0x00A357
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DS39532A-page 31-128 2000 Microchip Technology Inc.
TBLWT Table Write
Syntax: [ label ] TBLWT[*, *+, *-, +*]
Operands: 0 ≤ m ≤ 3
Operation: if TBLWT*,
(TABLAT) → Prog Mem (TBLPTR) or Holding Register1;
TBLPTR - No Change;
if TBLWT*+,
(TABLAT) → Prog Mem (TBLPTR) or Holding Register1;
(TBLPTR) +1 → TBLPTR;
if TBLWT*-,
(TABLAT) → Prog Mem (TBLPTR) or Holding Register1;
(TBLPTR) -1 → TBLPTR;
if TBLWT+*,
(TBLPTR) +1 → TBLPTR;
(TABLAT) → Prog Mem (TBLPTR) or Holding Register1;
Note 1: The use of a Holding Register(s) is device specific. Please refer
to the Device Data Sheet for information on the operation of the
TBLWT instruction with the Program Memory.
Status Affected: None
Encoding: 0000 0000 0000 11mm * → mm = 00
*+ → mm = 01
*- → mm = 10
+* → mm = 11
Description: This instruction is used to program the contents of Program Memory. To
address the program memory a pointer called Table Pointer (TBLPTR) is
used.
The TBLPTR (a 21-bit pointer) points to each byte in the program memory.
TBLPTR has a 2 MBtye address range. The LSb of the TBLPTR selects
which byte of the program memory location to access.
TBLPTR[0] = 0: Least Significant byte of Program Memory Word
TBLPTR[0] = 1: Most Significant byte of Program Memory Word
The Program Memory word address is the same as the TBLPTR address,
except that the LSb of TBLPTR (TBLPTR[0]) is always forced to ’0’.
The TBLWT instruction can modify the value of TBLPTR as follows:
• no change
• post-increment
• post-decrement
• pre-increment
Words: 1
Cycles: 2 (many if long write to internal program memory)
Q Cycle Activity:
1st cycle:
Q1 Q2 Q3 Q4
Decode No
operation
No
operation
No
operation
2nd cycle:
No
operation
No
operation
(Table Pointer
on Address
bus)
No
operation
No
operation
(Table Latch on
Address bus,
WR goes low)
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Section 31. Instruction Set
Instruction Set
31
Example 31-4:Program Memory Contents for Examples
Word Address
(points to low byte)
Original
Data Word
(before)
Example 1
Data Word
(after)
Example 2
Data Word
(after)
Example 3
Data Word
(after)
Example 4
Data Word
(after)
MSb LSb MSb LSb MSb LSb MSb LSb MSb LSb
0x00A356 0x12 0x34 0x12 0x55 0x12 0x34 0xAA 0x34 0x12 0x34
0x00A358 0x56 0x28 0x56 0x28 0x56 0xAA 0x56 0x28 0x5A 0x28
0x00A35A 0xAA 0x55 0xAA 0x55 0xAA 0x55 0xAA 0x55 0xAA 0x55
TABLAT 0x55 0xAA 0xAA 0x5A
Example 1 TBLWT*+ ; Write byte addressed by
; TBLPTR, then increment TBLPTR
Before Instruction
TABLAT = 0x55
TBLPTR = 0x00A356
Contents of (TBLPTR) = 0x34
After Instruction
TBLPTR = 0x00A357
Contents of (TBLPTR) = 0x55
Example 2 TBLWT+* ; Increment TBLPTR, then Write
; byte addressed by TBLPTR
Before Instruction
TABLAT = 0xAA
TBLPTR = 0x00A357
Contents of (TBLPTR) = 0x12
Contents of (TBLPTR + 1) = 0x28
After Instruction
TBLPTR = 0x00A358
Contents of (TBLPTR) = 0x12
Contents of (TBLPTR + 1) = 0xAA
Example 3 TBLWT*- ; Write byte addressed by
; TBLPTR, then decrement TBLPTR
Before Instruction
TABLAT = 0xAA
TBLPTR = 0x00A357
Contents of (TBLPTR) = 0x12
After Instruction
TBLPTR = 0x00A356
Contents of (TBLPTR) = 0xAA
Example 4 TBLWT* ; Write byte addressed by
; TBLPTR. TBLPTR is unchanged
Before Instruction
TABLAT = 0x5A
TBLPTR = 0x00A359
Contents of (TBLPTR) = 0x56
After Instruction
TBLPTR = 0x00A359
Contents of (TBLPTR) = 0x5A
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DS39532A-page 31-130 2000 Microchip Technology Inc.
TSTFSZ Test f, Skip if 0
Syntax: [ label ] TSTFSZ f, a
Operands: 0 ≤ f ≤ 255
a ∈ [0,1]
Operation: Skip if (f) = 0
Status Affected: None
Encoding: 0110 011a ffff ffff
Description: If Register 'f' = 0, the next instruction fetched is discarded and a NOP is
executed (two NOPs if the fetched instruction is a two-cycle instruction).
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1 (2 or 3)
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
If skip (2nd cycle):
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
If skip and followed by a two word instruction:
Q1 Q2 Q3 Q4
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Example 1A HERE
NZERO
ZERO
TSTFSZ
•
•
REG1, 1 ; If Register REG1 is zero
; then skip the next
; program memory address
Before Instruction
REG1 = 0xAF
PC = Address (HERE)
After Instruction
PC = Address (NZERO)
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Section 31. Instruction Set
Instruction Set
31
Example 2 HERE
NZERO
ZERO
TSTFSZ
•
•
REG1, 1 ; If Register REG1 is zero
; then skip the next
; program memory address
Before Instruction
REG1 = 0x00
PC = Address (HERE)
After Instruction
PC = Address (ZERO)
Example 3 HERE
NZERO
ZERO
TSTFSZ
•
•
REG1, 0 ; If Register REG1 is zero
; then skip the next
; program memory address
Case 1 Before Instruction
REG1 = 0xAF
Address of REG1 = 0x9A, Bank 3
0x9A, Bank 15 = 0x00
PC = Address (HERE)
After Instruction
PC = Address (ZERO)
Case 2 Before Instruction
REG1 = 0x00
Address of REG1 = 0x9A, Bank 3
0x9A, Bank 15 = 0xAF
PC = Address (HERE)
After Instruction
PC = Address (NZERO)
Example 4 HERE
NZERO
ZERO
TSTFSZ
•
•
INDF0, 1 ; If Register pointed to by
; FSR0 (FSR0H:FSR0L) is
; zero, then skip the next
; program memory address
Case 1 Before Instruction
FSR0 = 0x6C2
Contents of Address
(FSR0) = 0xAF
PC = Address (HERE)
After Instruction
FSR0 = 0x6C2
Contents of Address
(FSR0) = 0xAF
PC = Address (NZERO)
Case 2 Before Instruction
FSR0 = 0x6C2
Contents of Address (FSR0) = 0x00
PC = Address (HERE)
After Instruction
FSR0 = 0x6C2
Contents of Address (FSR0) = 0x00
PC = Address (ZERO)
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DS39532A-page 31-132 2000 Microchip Technology Inc.
XORLW Exclusive OR Literal with W
Syntax: [ label] XORLW k
Operands: 0 ≤ k ≤ 255
Operation: (WREG).XOR. k → W
Status Affected: Z, N
Encoding: 0000 1010 kkkk kkkk
Description: The contents of the WREG Register are XOR’ed with the eight bit literal 'k'.
The result is placed in the WREG Register.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
literal 'k'
Process
data
Write to
WREG
Register
Example 1 XORLW 0xAF ; Exclusive OR the value
; in WREG with AFh
Before Instruction
WREG = 0xB5
Z, N = x
; 1011 0101 (0xB5)
; 1010 1111 (0xAF)
After Instruction ; --------- ------
WREG = 0x1A
Z =0
N =0
; 0001 1010 (0x1A)
Example 2 XORLW MYREG ; Exclusive OR the value
; in WREG with the address
; of MYREG
Before Instruction
WREG = 0xAF
Address of MYREG †
= 0x37
Z, N = x
† MYREG is a symbol for a
data memory location
After Instruction
WREG = 0x98
Z =0
N =1
; 1010 1111
;
; 0011 0111
; ---- ----
; 1001 1000
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Section 31. Instruction Set
Instruction Set
31
Example 3 XORLW HIGH (LU_TABLE) ; Exclusive OR the value
; in WREG with the high
; byte of the address of
; LU_TABLE
Before Instruction
WREG = 0xAF
Address of LU_TABLE †
= 0x9375
Z, N = x
† LU_TABLE is a label for an
address in program memory
After Instruction
WREG = 0x3C
Z =0
N =0
;
; 1010 1111
;
; 1001 0011
; ---- ----
;
;
;
; 0011 1100
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PIC18C Reference Manual
DS39532A-page 31-134 2000 Microchip Technology Inc.
XORWF Exclusive OR W with f
Syntax: [ label ] XORWF f, d, a
Operands: 0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation: (WREG).XOR. (f) → destination
Status Affected: Z, N
Encoding: 0001 10da ffff ffff
Description: Exclusive OR the contents of the WREG Register with Register 'f'.
The ’d’ bit selects the destination for the operation.
If 'd' is 1; the result is stored back in the File Register 'f'.
If 'd' is 0; the result is stored in the WREG Register.
The ’a’ bit selects which bank is accessed for the operation.
If ’a’ is 1; the bank specified by the BSR Register is used.
If ’a’ is 0; the access bank is used.
Words: 1
Cycles: 1
Q Cycle Activity:
Q1 Q2 Q3 Q4
Decode Read
Register 'f'
Process
data
Write to
destination
Example 1 XORWF REG1, 1, 1 ; Exclusive OR the value
; in WREG with the value in
; REG1
Before Instruction
REG1 = 0xAF
WREG = 0xB5
Z, N = x
; 1010 1111 (0xAF)
; 1011 0101 (0xB5)
; --------- ------
After Instruction
REG1 = 0x1A
WREG = 0xB5
Z =0
N =0
; 0001 1010 (0x1A)
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Section 31. Instruction Set
Instruction Set
31
Example 2 XORWF REG1, 0, 1 ; Exclusive OR the value
; in WREG with the value in
; REG1. Place result in
; WREG
Before Instruction
REG1 = 0xAF
WREG = 0xB5
Z, N = x
; 1010 1111 (0xAF)
; 1011 0101 (0xB5)
; --------- ------
After Instruction
REG1 = 0xAF
WREG = 0x1A
Z =0
N =0
;
; 0001 1010 (0x1A)
Example 3 XORWF INDF0, 1, 1 ; Exclusive OR the value
; in WREG with the value
; pointed to by the FSR0
; (FSR0H:FSR0L) Register
Before Instruction
WREG = 0xB5
FSR0 = 0x7C2
Contents of Address
(FSR0) = 0xAF
Z, N = x
After Instruction
WREG = 0xB5
FSR0 = 0x7C2
Contents of Address
(FSR0) = 0x1A
Z =0
N =0
;
; 1011 0101
;
;
; 1010 1111
;
;
;
;
;
; 0001 1010
;
;
Example 4 XORWF REG1, 1, 0 ; Exclusive OR the value
; in WREG with the value
; at address REG1 in the
; access bank. Place
; result in access bank
Before Instruction
WREG = 0xF8
REG1 = 0x01
Contents of Address
(REG1) in access bank
= 0xAA
Z, N = x
After Instruction
WREG = 0xF8
REG1 = 0x01
Contents of Address
(REG1) in access bank
= 0x52
Z =0
N =0
;
; 1111 1000
; 0000 0001
;
;
; 1010 1010
;
;
;
;
;
;
; 0101 0010
;
;
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DS39532A-page 31-136 2000 Microchip Technology Inc.
31.8 Design Tips
Question 1: I have seen references to “Read-Modify-Write” instructions in your data
sheet, but I do not know what that is. Can you explain what it is and why I
need to know this?
Answer 1:
An easy example of a Read-Modify-Write (or R-M-W) instruction is the bit clear instruction BCF.
You might think that the processor just clears the bit, which on a port output pin would clear the
pin. What actually happens is the whole port (or register) is first read, THEN the bit is cleared,
then the new modified value is written back to the port (or register). Actually, any instruction that
depends on a value currently in the register is going to be a Read-Modify-Write instruction. This
includes ADDWF, SUBWF, BCF, BSF, INCF, XORWF, etc... Instructions that do not depend
on the current register value, like MOVWF, CLRF, and so on are not R-M-W instructions.
One situation where you would want to consider the affects of a R-M-W instruction is a port that
is continuously changed from input to output and back. For example, say you have TRISB set to
all outputs, and write all ones to the PORTB Register, all of the PORTB pins will go high. Now,
say you turn pin RB3 into an input, which happens to go low. A BCF PORTB,6 is then executed
to drive pin RB6 low. If you then turn RB3 back into an output, it will now drive low, even though
the last value you put there was a one. What happened was that the BCF of the other pin (RB6)
caused the whole port to be read, including the zero on RB3 when it was an input. Then, bit 6
was changed as requested, but since RB3 was read as a zero, zero will also be placed back into
that port latch, overwriting the one that was there before. When the pin is turned back into an
output, the new value was reflected. Try using the LATx register instead of the PORTx register
for this read-modify-write operation.
Question 2: When I perform a BCF, other pins get cleared in the port. Why?
Answer 2:
There are a few possibilities, two are:
1. Another case where a R-M-W instruction may seem to change other pin values unexpectedly
can be illustrated as follows: Suppose you make PORTC all outputs and drive the
pins low. On each of the port pins is an LED connected to ground, such that a high output
lights it. Across each LED is a 100 µF capacitor. Let's also suppose that the processor is
running very fast, say 20 MHz. Now if you go down the port setting each pin in order; BSF
PORTC,0 then BSF PORTC,1 then BSF PORTC,2 and so on, you may see that only the
last pin was set, and only the last LED actually turns on. This is because the capacitors
take a while to charge. As each pin was set, the pin before it was not charged yet and so
was read as a zero. This zero is written back out to the port latch (R-M-W, remember)
which clears the bit you just tried to set the instruction before. This is usually only a concern
at high speeds and for successive port operations, but it can happen, so take it into
consideration.
2. If this is on a PIC16C7X device, you may not have configured the I/O pins properly in the
ADCON1 Register. If a pin is configured for analog input, any read of that pin will read a
zero, regardless of the voltage on the pin. This is an exception to the normal rule that the
pin state is always read. You can still configure an analog pin as an output in the TRIS
Register, and drive the pin high or low by writing to it, but you will always read a zero.
Therefore, if you execute a Read-Modify-Write instruction (see previous question), all
analog pins are read as zero, and those not directly modified by the instruction will be written
back to the port latch as zero. A pin configured as analog is expected to have values
that may be neither high nor low to a digital pin, or floating. Floating inputs on digital pins
are a no-no, and can lead to high current draw in the input buffer, so the input buffer is
disabled.
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Section 31. Instruction Set
Instruction Set
31
31.9 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced family (that is they may be written for
the Baseline, the Mid-Range, or High-End families), but the concepts are pertinent, and could be
used (with modification and possible limitations). The current application notes related to the
Instruction Set are:
Title Application Note #
No related Application Notes at this time.
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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DS39532A-page 31-138 2000 Microchip Technology Inc.
31.10 Revision History
Revision A
This is the initial released revision of the Enhanced MCU Instruction Set description.
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2000 Microchip Technology Inc. DS39533A-page 32-1
Electrical
Specifications
32
Section 32. Electrical Specifications
HIGHLIGHTS
32.1 Introduction .................................................................................................................. 32-2
32.2 Absolute Maximums..................................................................................................... 32-3
32.3 Voltage vs Frequency Graph........................................................................................ 32-4
32.4 Device Voltage Specifications ...................................................................................... 32-6
32.5 Device Current Specifications...................................................................................... 32-7
32.6 Input Threshold Levels............................................................................................... 32-10
32.7 I/O Current Specifications .......................................................................................... 32-11
32.8 Output Drive Levels.................................................................................................... 32-12
32.9 I/O Capacitive Loading............................................................................................... 32-13
32.10 Low Voltage Detect (LVD) .......................................................................................... 32-14
32.11 EPROM/FLASH/Data EEPROM ................................................................................ 32-15
32.12 Comparators and Voltage Reference......................................................................... 32-16
32.13 Timing Parameter Symbology.................................................................................... 32-18
32.14 Example External Clock Timing Waveforms and Requirements................................ 32-19
32.15 Example Phase Lock Loop (PLL) Timing Waveforms and Requirements ................. 32-20
32.16 Example Power-up and RESET Timing Waveforms and Requirements.................... 32-22
32.17 Example Timer0 and Timer1 Timing Waveforms and Requirements......................... 32-23
32.18 Example CCP Timing Waveforms and Requirements ............................................... 32-24
32.19 Example Parallel Slave Port (PSP) Timing Waveforms and Requirements ............... 32-25
32.20 Example SSP and Master SSP SPI Mode Timing Waveforms and Requirements.... 32-26
32.21 Example SSP I2C Mode Timing Waveforms and Requirements................................ 32-30
32.22 Example Master SSP I2C Mode Timing Waveforms and Requirements.................... 32-32
32.23 Example USART/SCI Timing Waveforms and Requirements.................................... 32-34
32.24 CAN Specifications .................................................................................................... 32-35
32.25 Example 8-bit A/D Timing Waveforms and Requirements ......................................... 32-36
32.26 Example 10-bit A/D Timing Waveforms and Requirements ....................................... 32-38
32.27 Design Tips ................................................................................................................ 32-40
32.28 Related Application Notes.......................................................................................... 32-41
32.29 Revision History ......................................................................................................... 32-42
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DS39533A-page 32-2 2000 Microchip Technology Inc.
32.1 Introduction
This section is intended to present the electrical specifications that may be specified in a particular
device data sheet and their meaning. This section is NOT intended to give the values of
these specifications. For the device specific values you must refer to the device’s data sheet. All
values shown in this section should be considered as Example Values.
In the description of the device and the functional modules (previous sections), there have been
references to electrical specification parameters. These references have been hyperlinked in the
electronic version to aid in the use of this manual.
Throughout this section, certain terms will be used. Table 32-1 shows the conventions that will
be used.
Table 32-1: Term Conventions
Note: Before starting any design, Microchip HIGHLY recommends that you acquire the
most recent copy of the device data sheet and review the electrical specifications to
ensure that they will meet your requirements.
Term Description
PIC18CXXX(1) For EPROM Program Memory devices tested to standard voltage
range
PIC18LCXXX(1) For EPROM Program Memory devices tested to extended voltage
range
PIC18FXXX(1) For FLASH Program Memory devices tested to standard voltage
range
PIC18LFXXX(1) For FLASH Program Memory devices tested to extended voltage
range
PIC18CRXXX(1) For ROM Program Memory devices tested to standard voltage range
PIC18LCRXXX(1) For ROM Program Memory devices tested to extended voltage range
LP osc For devices configured with the LP device oscillator selected
XT osc For devices configured with the XT device oscillator selected
HS osc For devices configured with the HS device oscillator selected
HS+PLL osc For devices configured with the HS+PLL device oscillator selected
RC osc For devices configured with the RC device oscillator selected
RCIO osc For devices configured with the RCIO device oscillator selected
EC osc For devices configured with the EC device oscillator selected
ECIO osc For devices configured with the ECIO device oscillator selected
Commercial For devices with the commercial temperature range grading
(0°C ≤ TA ≤ +70°C)
Industrial For devices with the industrial temperature range grading
(-40°C ≤ TA ≤ +85°C)
Extended For devices with the extended temperature range grading
(-40°C ≤ TA ≤ +125°C)
Note 1: In Electrical Specification examples, we will use PIC18CXXX for the standard voltage
range devices and PIC18LCXXX for the extended voltage range devices.
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Section 32. Electrical Specifications
Electrical
Specifications
32
32.2 Absolute Maximums
The Absolute Maximum Ratings specify the worst case conditions that can be applied to the
device. These ratings are not meant as operational specifications. Stresses above the listed values
may cause damage to the device. Specifications are not always stand-alone, that is, the
specification may have other requirements as well.
An example of this is the “maximum current sourced/sunk by any I/O pin”. The number of I/O pins
that can be sinking/sourcing current, at any one time, is dependent upon the maximum current
sunk/source by the port(s) (combined) and the maximum current into the VDD pin or out of the
VSS pin. In this example, the physical reason is the Power and Ground bus width to the I/O ports
and internal logic. If these specifications are exceeded, then electromigration may occur on these
Power and Ground buses. Over time, electromigration would cause these buses to open (be disconnected
from the pin) and, therefore, cause the logic attached to these buses to stop operating.
So, exceeding the absolute specifications may cause device reliability issues.
Input Clamp Current is defined as the current through the diode to VSS/VDD if pin voltage exceeds
specification.
Example Absolute Maximum Ratings †
Ambient temperature under bias............................................................................ -55 to +125°C
Storage temperature .......................................................................................... -65°C to +150°C
Voltage on any pin with respect to VSS (except VDD, MCLR, and RA4)..... -0.3V to (VDD + 0.3V)
Voltage on VDD with respect to VSS ........................................................................ -0.3 to +7.5V
Voltage on MCLR with respect to VSS (2) ................................................................. 0 to +13.25V
Voltage on RA4 with respect to Vss ............................................................................. 0 to +8.5V
Total power dissipation (1) .................................................................................................... 1.0W
Maximum current out of VSS pin ...................................................................................... 300 mA
Maximum current into VDD pin ......................................................................................... 250 mA
Input clamp current, IIK (VI < 0 or VI > VDD).................................................................... ± 20 mA
Output clamp current, IOK (VO < 0 or VO > VDD) ............................................................. ± 20 mA
Maximum output current sunk by any I/O pin..................................................................... 25 mA
Maximum output current sourced by any I/O pin ............................................................... 25 mA
Maximum current sunk by PORTA, PORTB, and PORTE (combined)............................. 200 mA
Maximum current sourced by PORTA, PORTB, and PORTE (combined) ....................... 200 mA
Maximum current sunk by PORTC and PORTD (combined) ........................................... 200 mA
Maximum current sourced by PORTC and PORTD (combined)...................................... 200 mA
Maximum current sunk by PORTF and PORTG (combined) ........................................... 100 mA
Maximum current sourced by PORTF and PORTG (combined) ...................................... 100 mA
Note 1: Power dissipation is calculated as follows:
Pdis = VDD x {IDD - IOH} + {(VDD - VOH)xIOH} + (VOlxIOL)
2: Voltage spikes below VSS at the MCLR/VPP pin, inducing currents greater than
80 mA, may cause latch-up. Thus, a series resistor of 50-100Ω should be used when
applying a “low” level to the MCLR/VPP pin, rather than pulling this pin directly to VSS.
† NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent
damage to the device. This is a stress rating only and functional operation of the
device at those or any other conditions above those indicated in the operation listings of this
specification is not implied. Exposure to maximum rating conditions for extended periods may
affect device reliability.
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PIC18C Reference Manual
DS39533A-page 32-4 2000 Microchip Technology Inc.
32.3 Voltage vs Frequency Graph
Windowed devices are superset devices with all oscillator configurations tested to the specification
ranges of the C and LC devices. The temperature range that the device is tested to should
be considered commercial, though at a later time, they may be tested to industrial or extended
temperature levels.
Figure 32-1 and Figure 32-2 show proposed voltage vs frequency graphs for the C and LC
devices.
Battery applications usually require an extended voltage range. Devices marked LC have an
extended voltage range.
Note: Devices that are designated Engineering Sample are tested to the current engineering
test program at time of the device testing. There is no implied warranty that these
devices have been tested to any or all specifications in the Device Data Sheet.
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2000 Microchip Technology Inc. DS39533A-page 32-5
Section 32. Electrical Specifications
Electrical
Specifications
32
The voltage vs frequency graphs show what is the maximum frequency of operation for a given
voltage. Figure 32-1 is for a C device, while Figure 32-2 is for an LC device. Notice that for
Figure 32-2, there is a slope from 6MHz to 40 MHz. An equation is given in the figure which will
allow you to calculate the maximum frequency of operation for a given voltage.
Figure 32-1: Example PIC18CXXX Voltage Frequency Graph
Figure 32-2: Example PIC18LCXXX Voltage Frequency Graph
Frequency
Voltage
6.0 V
5.5 V
4.5 V
4.0 V
2.0 V
40 MHz
5.0 V
3.5 V
3.0 V
2.5 V
PIC18CXXX
4.2V
Frequency
Voltage
6.0 V
5.5 V
4.5 V
4.0 V
2.0 V
40 MHz
5.0 V
3.5 V
3.0 V
2.5 V
PIC18LCXXX
FMAX = (20.0 MHz/V) (VDDAPPMIN - 2.5 V) + 6 MHz
6 MHz
4.2V
Note: VDDAPPMIN is the minimum voltage of the PICmicro® device in the application.
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DS39533A-page 32-6 2000 Microchip Technology Inc.
32.4 Device Voltage Specifications
These specifications relate to the device VDD, power-up, and function.
Supply Voltage is the voltage level that must be applied to the device VDD pins for the proper
functional operation.
RAM Data Retention Voltage is the minimum level that the device voltage may be at and still
retain the RAM’s data value.
VDD Start Voltage to ensure the internal Power-on Reset signal, is the level that VDD must start
from, to ensure that the POR circuitry will operate properly.
VDD Rise Rate to ensure internal Power-on Reset signal, is the minimum slope that VDD must
rise to cause the POR circuitry to trip.
Brown-out Reset Voltage is the voltage range where the brown-out circuitry may trip. When the
BOR circuitry trips, the device will either be in Brown-out Reset, or has just come out of
Brown-out Reset.
Table 32-2: Example DC Characteristics
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial
-40°C ≤ TA ≤ +125°C for extended
Param
No.
Symbol Characteristic Min Typ† Max Units Conditions
VDD Supply Voltage
D001 PIC18CXXX 4.2 — 5.5 V
PIC18LCXXX 2.5 — 5.5 V HS, XT, RC and LP osc mode
D002 VDR RAM Data Retention
Voltage (1)
1.5 — — V
D003 VPOR VDD Start Voltage to
ensure internal
Power-on Reset signal
— — 0.7 V See section on Power-on Reset for details
D004 SVDD VDD Rise Rate to
ensure internal
Power-on Reset signal
0.05 — — V/ms See section on Power-on Reset for details
VBOR Brown-out Reset
Voltage
D005 BORV1:BORV0 = 11 1.8 — 1.91 V For PIC18LCxxx VDDMIN = 1.8V
BORV1:BORV0 = 11 2.5 — 2.66 For PIC18LCxxx VDDMIN > 1.8V
BORV1:BORV0 = 10 2.7 — 2.86
BORV1:BORV0 = 01 4.2 — 4.46
BORV1:BORV0 = 00 4.5 — 4.78
D007 VBHYS Brown-out Hysteresis 30 — 100 mV
Note 1: This is the limit to which VDD can be lowered in SLEEP mode or during a device RESET without losing RAM
data.
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2000 Microchip Technology Inc. DS39533A-page 32-7
Section 32. Electrical Specifications
Electrical
Specifications
32
32.5 Device Current Specifications
IDD is referred to as supply current and is the current (I) consumed by the device when in operating
mode. This test is taken with all I/O as inputs, either pulled high or low. That is, there are
no floating inputs, nor are any pins driving an output (with a load).
IPD is referred to as power-down current and is the current (I) consumed by the device when in
SLEEP mode (power-down), referred to as power-down current. These tests are taken with all
I/O as inputs, either pulled high or low. That is, there are no floating inputs, nor are any pins driving
an output (with a load), weak pull-ups are disabled.
A device may have certain features and modules that can operate while the device is in SLEEP
mode. Some of these modules are:
• Watchdog Timer (WDT)
• Low Voltage Detect (LVD)
• Brown-out Reset (BOR) circuitry
• Timer1 Oscillator
• Analog to Digital converter
• Comparators
• Voltage Reference
• CAN Module
When all features are disabled, the device will consume the lowest possible current (the leakage
current). If any of these features are operating while the device is in SLEEP, a higher current will
occur. The difference in current between the lowest power mode (everything off) and only that
one feature enabled (such as the WDT), is what we call the Module Differential Current. If more
then one feature is enabled, then the expected current can easily be calculated as: the base current
(everything disabled and in SLEEP mode) plus all Module Differential Currents (delta currents).
Example 32-1 shows an example of calculating the typical currents for a device at 5V, with
the WDT and Timer1 oscillator enabled.
Example 32-1: IPD Calculations with WDT and Timer1 Oscillator Enabled (@ 5V)
Note: Some modules (such as the Brown-out Reset and Low Voltage Detect) use a common
resource (an internal reference voltage generator). This resource may consume
a significant percentage of the total modules current when enabled. Since 2
modules are using this, the total current will be less then the calculation.
Base Current 14 nA ; Device leakage current
WDT Delta Current 14 µA ; 14 µA - 14 nA = 14 µA
TMR1 Delta Current 22 µA ; 22 µA - 14 nA = 22 µA
Total SLEEP Current 36 µA ;
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DS39533A-page 32-8 2000 Microchip Technology Inc.
Table 32-3: Example DC Characteristics
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial
-40°C ≤ TA ≤ +125°C for extended
Param
No.
Symbol Characteristic Min Typ Max Units Conditions
D010
IDD Supply Current (2,4)
— — 4 µA XT, RC, RCIO osc configurations
FOSC = 4 MHz, VDD = 4.2V
D010A — — 48 mA LP osc configuration
FOSC = 32 kHz, VDD = 4.2V
D010C — — 45 mA EC, ECIO osc configurations,
Fosc = 40 MHz, VDD = 5.5V
D013 — — 50 mA HS osc configurations
Fosc = 25 MHz, VDD = 5.5V
D013 — — 50 mA HS4 osc configuration
Fosc = 10 MHz, VDD = 5.5V
D014
—
—
—
—
48
TBD
µA
µA
OSCB osc configuration
FOSC = 32 kHz, VDD = 4.2V
FOSC = 32 kHz, VDD = 4.2V, 25°C
IPD Power-down Current (3)
D020 —
—
<1
—
TBD
36
µA
µA
VDD = 4.2V, -40°C to +85°C
VDD = 5.5V, -40°C to +85°C
D020A — — TBD µA VDD = 4.2V, 25°C
D021B —
—
—
—
TBD
42
µA
µA
VDD = 4.2V, -40°C to +125°C
VDD = 5.5V, -40°C to +125°C
Legend: Shading of rows is to assist in readability of the table.
Note 1: Not applicable.
2: The supply current is mainly a function of the operating voltage and frequency. Other factors, such as I/O pin
loading and switching rate, oscillator type, internal code execution pattern and temperature, also have an
impact on the current consumption.
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail to rail; all I/O pins set to inputs, pulled to VDD
MCLR = VDD; WDT enabled/disabled as specified.
3: The power-down current in SLEEP mode does not depend on the oscillator type. Power-down current is
measured with the part in SLEEP mode, with all I/O pins set to inputs, tied to VDD or VSS, and all features
that add delta current disabled (such as WDT, Timer1 Oscillator, ...).
4: For RC osc configuration, current through REXT is not included. The current through the resistor can be estimated
by the formula Ir = VDD/2REXT (mA) with REXT in kOhm.
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Section 32. Electrical Specifications
Electrical
Specifications
32
Module Differential
Current
D022 ∆IWDT Watchdog Timer —
—
—
—
—
—
—
—
—
—
25
TBD
TBD
12
TBD
µA
µA
µA
µA
µA
VDD = 5.5V, -40°C to +85°C
VDD = 5.5V, -40°C to +125°C
VDD = 4.2V, 25°C
VDD = 2.5V
VDD = 2.5V, +25°C
D022A ∆IBOR Brown-out Reset —
—
—
—
—
—
—
—
—
—
50
TBD
TBD
12
TBD
µA
µA
µA
µA
µA
VDD = 5.5V, -40°C to +85°C
VDD = 5.5V, -40°C to +125°C
VDD = 4.2V, 25°C
VDD = 2.5V
VDD = 2.5V, +25°C
D022B ∆ILVD Low Voltage Detect —
—
—
—
—
—
—
—
—
—
TBD
TBD
TBD
50
TBD
µA
µA
µA
µA
µA
VDD = 4.2V, -40°C to +85°C
VDD = 4.2V, -40°C to +125°C
VDD = 4.2V, +25°C
VDD = 2.5V
VDD = 2.5V, +25°C
D022C ∆IDDC A/D Converter Current —
—
—
—
—
—
—
—
—
—
TBD
TBD
TBD
TBD
TBD
µA
µA
µA
µA
µA
VDD = 5.5V, -40°C to +85°C
VDD = 5.5V, -40°C to +125°C
VDD = 4.2V, 25°C
VDD = 2.5V
VDD = 2.5V, +25°C
D025 ∆IOSCB Timer1 Oscillator —
—
—
—
—
—
—
—
—
—
TBD
TBD
TBD
3
TBD
µA
µA
µA
µA
µA
VDD = 4.2V, -40°C to +85°C
VDD = 4.2V, -40°C to +125°C
VDD = 4.2V, 25°C
VDD = 2.5V
VDD = 2.5V, +25°C
Table 32-3: Example DC Characteristics (Continued)
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial
-40°C ≤ TA ≤ +125°C for extended
Param
No.
Symbol Characteristic Min Typ Max Units Conditions
Legend: Shading of rows is to assist in readability of the table.
Note 1: Not applicable.
2: The supply current is mainly a function of the operating voltage and frequency. Other factors, such as I/O pin
loading and switching rate, oscillator type, internal code execution pattern and temperature, also have an
impact on the current consumption.
The test conditions for all IDD measurements in active operation mode are:
OSC1 = external square wave, from rail to rail; all I/O pins set to inputs, pulled to VDD
MCLR = VDD; WDT enabled/disabled as specified.
3: The power-down current in SLEEP mode does not depend on the oscillator type. Power-down current is
measured with the part in SLEEP mode, with all I/O pins set to inputs, tied to VDD or VSS, and all features
that add delta current disabled (such as WDT, Timer1 Oscillator, ...).
4: For RC osc configuration, current through REXT is not included. The current through the resistor can be estimated
by the formula Ir = VDD/2REXT (mA) with REXT in kOhm.
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DS39533A-page 32-10 2000 Microchip Technology Inc.
32.6 Input Threshold Levels
The Input Low Voltage (VIL) is the maximum voltage level that will be read as a logic ’0’. An input
may not read a ’0’ at a voltage level above this. All designs should be to the specification, since
device to device (and to a much lesser extent pin to pin) variations will cause this level to vary.
The Input High Voltage (VIH) is the minimum voltage level that will be read as a logic ’1’. An input
may not read a ’1’ at a voltage level below this. All designs should be to the specification, since
device to device (and to a much lesser extent pin to pin) variations will cause this level to vary.
The I/O pins with TTL levels are shown with two specifications. One is the industry standard TTL
specification, which is specified for the voltage range of 4.5V to 5.5V. The other specifies operation
over the entire voltage range of the device. The better of these two specifications may be
used in the design (see Note 2 in Table 32-4).
Table 32-4: Example DC Characteristics
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial
-40°C ≤ TA ≤ +125°C for extended
Operating voltage VDD range as described in DC spec
Table 32-2.
Param
No.
Symbol Characteristic Min Max Units Conditions
VIL Input Low Voltage
I/O ports:
D030 with TTL buffer VSS 0.15VDD V For entire VDD range (2)
D030A — 0.8 V 4.5V ≤ VDD ≤ 5.5V (2)
D031 with Schmitt Trigger buffer
RC3 and RC4
VSS
VSS
0.2VDD
0.3VDD
V
V
D032 MCLR VSS 0.2VDD V
D032A OSC1 (in XT, HS and LP modes)
and T1OSI
VSS 0.3VDD V
D033 OSC1 (in RC mode) (1) VSS 0.2VDD V
VIH Input High Voltage
I/O ports:
D040 with TTL buffer 0.25VDD
+ 0.8V
VDD V For entire VDD range (2)
D040A 2.0 VDD V 4.5V ≤ VDD ≤ 5.5V (2)
D041 with Schmitt Trigger buffer
RC3 and RC4
0.8VDD
0.7VDD
VDD
VDD
V
V
D042 MCLR 0.8VDD VDD V
D042A OSC1 (in XT, HS and LP modes)
and T1OSI
0.7VDD VDD V
D043 OSC1 (RC mode) (1) 0.9VDD VDD V
D050 VHYS Hysteresis of Schmitt Trigger Inputs TBD TBD V
Note 1: In RC oscillator configuration, the OSC1/CLKIN pin is a Schmitt Trigger input. It is not recommended that
the PICmicro be driven with an external clock while in RC mode.
2: The better of the two specifications may be used. For VIL, this would be the higher voltage and for VIH, this
would be the lower voltage.
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2000 Microchip Technology Inc. DS39533A-page 32-11
Section 32. Electrical Specifications
Electrical
Specifications
32
32.7 I/O Current Specifications
The PORT Weak Pull-up Current is the additional current consumed when the weak pull-ups
are enabled.
Leakage Currents are the currents that the device consumes, since the devices are manufactured
in the real world and do not adhere to their ideal characteristics. Ideally, there should be no
current on an input, but due to the real world, there is always some parasitic path that consumes
negligible current.
Table 32-5: Example DC Characteristics
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial and
-40°C ≤ TA ≤ +125°C for extended
Operating voltage VDD range as described in DC spec Table 32-2.
Param
No.
Symbol Characteristic Min Max Units Conditions
IIL Input Leakage Current (2,3)
D060 I/O ports — ±1 µA Vss ≤ VPIN ≤ VDD,
Pin at hi-impedance
D061 MCLR — ±5 µA Vss ≤ VPIN ≤ VDD
D063 OSC1 — ±5 µA Vss ≤ VPIN ≤ VDD
Weak Pull-up Current
D070 IPURB PORTB weak pull-up current 50 400 µA VDD = 5V, VPIN = VSS
Note 1: Not applicable.
2: The leakage current on the MCLR pin is strongly dependent on the applied voltage level. The specified
levels represent normal operating conditions. Higher leakage current may be measured at different input
voltages.
3: Negative current is defined as current sourced by the pin.
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PIC18C Reference Manual
DS39533A-page 32-12 2000 Microchip Technology Inc.
32.8 Output Drive Levels
The Output Low Voltage (VOL) is the pin’s output voltage for a low level. The VOL of an I/O pin
is dependent on the current sunk by that pin. If an I/O pin is shorted to VDD, no matter the drive
capability of the I/O pin, a low level would not be reached (and the device would consume excessive
drive current). The VOL is the output voltage that the I/O pin will drive, given the I/O does not
need to sink more then the IOL current (at the specified device voltage), as specified in the conditions
portion of the specification.
The Output High Voltage (VOH) is the pin’s output voltage for a high level. The VOH of an I/O pin
is dependent on the current sourced by that pin. If an I/O pin is shorted to VSS, no matter the drive
capability of the I/O pin, a high level would not be reached (and the device would consume excessive
drive current). The VOH is the output voltage that the I/O pin will drive, given the I/O does not
need to source more then the IOH current (at the specified device voltage), as specified in the
conditions portion of the specification.
Table 32-6: Example DC Characteristics
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial and
-40°C ≤ TA ≤ +125°C for extended
Operating voltage VDD range as described in DC spec Table 32-2.
Param
No.
Symbol Characteristic Min Max Units Conditions
VOL Output Low Voltage
D080 I/O ports — 0.6 V IOL = 8.5 mA, VDD = 4.5V,
-40°C to +85°C
D080A — 0.6 V IOL = 7.0 mA, VDD = 4.5V,
-40°C to +125°C
D083 OSC2/CLKOUT
(RC mode)
— 0.6 V IOL = 1.6 mA, VDD = 4.5V,
-40°C to +85°C
D083A — 0.6 V IOL = 1.2 mA, VDD = 4.5V,
-40°C to +125°C
VOH Output High Voltage (1)
D090 I/O ports VDD - 0.7 — V IOH = -3.0 mA, VDD = 4.5V,
-40°C to +85°C
D090A VDD - 0.7 — V IOH = -2.5 mA, VDD = 4.5V,
-40°C to +125°C
D092 OSC2/CLKOUT
(RC mode)
VDD - 0.7 — V IOH = -1.3 mA, VDD = 4.5V,
-40°C to +85°C
D092A VDD - 0.7 — V IOH = -1.0 mA, VDD = 4.5V,
-40°C to +125°C
D150 VOD Open-drain High Voltage — 7.5 V RA4 pin
Note 1: Negative current is defined as current sourced by the pin.
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2000 Microchip Technology Inc. DS39533A-page 32-13
Section 32. Electrical Specifications
Electrical
Specifications
32
32.9 I/O Capacitive Loading
These loadings affect the specifications for the timing specifications. If the loading in your application
is different, then you will need to determine how this will affect the characteristics of the
device in your system. Capacitances less then these specifications should not have an effect on
a system.
Table 32-7: Example DC Characteristics
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial and
-40°C ≤ TA ≤ +125°C for extended
Operating voltage VDD range as described in DC spec Table 32-2.
Param
No.
Symbol Characteristic Min Typ† Max Units Conditions
Capacitive Loading Specs
on Output Pins
D101 CIO All I/O pins and OSC2
(in RC mode)
— — 50 pF To meet the Timing Specifications
of the Device
D102 CB SCL, SDA — — 400 pF In I2C mode
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PIC18C Reference Manual
DS39533A-page 32-14 2000 Microchip Technology Inc.
32.10 Low Voltage Detect (LVD)
Low Voltage Detect is internal circuitry which will set a flag when the device voltage crosses the
specified trip point.
Figure 32-3: Low-Voltage Detect Characteristics
Table 32-8: Example Low Voltage Detect Requirements
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial and
-40°C ≤ TA ≤ +125°C for extended
Operating voltage VDD range as described in DC spec Table 32-2.
Param
No. Symbol Characteristic Min Max Units Conditions
D420 VLVD LVD Voltage LVDL3:LVDL0 = 0100 2.5 2.66 V
LVDL3:LVDL0 = 0101 2.7 2.86 V
LVDL3:LVDL0 = 0110 2.8 2.98 V
LVDL3:LVDL0 = 0111 3.0 3.2 V
LVDL3:LVDL0 = 1000 3.3 3.52 V
LVDL3:LVDL0 = 1001 3.5 3.72 V
LVDL3:LVDL0 = 1010 3.6 3.84 V
LVDL3:LVDL0 = 1011 3.8 4.04 V
LVDL3:LVDL0 = 1100 4.0 4.26 V
LVDL3:LVDL0 = 1101 4.2 4.46 V
LVDL3:LVDL0 = 1110 4.5 4.78 V
VLVD
LVDIF
VDD
(LVDIF set by hardware)
(LVDIF can be
cleared in software)
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Section 32. Electrical Specifications
Electrical
Specifications
32
32.11 EPROM/FLASH/Data EEPROM
Table 32-9 shows the specifications for programming of the internal EPROM program memory.
Table 32-10 shows the specifications of the FLASH program memory and Data EEPROM.
Table 32-9: Example Program Memory Programming Requirements
Table 32-10: Example Data EEPROM/Flash Characteristics
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +40°C
Operating voltage VDD range as described in DC spec Table 32-2.
Param.
No. Sym Characteristic Min Max Units Conditions
Internal Program Memory
Programming Specs (1)
D110
D111
D112
D113
D114
D115
VPP
VDDP
IPP
IDDP
TPROG
TERASE
Voltage on MCLR/VPP pin
Supply voltage during
programming
Current into MCLR/VPP pin
Supply current during
programming
Programming pulse width
EPROM erase time
Device operation ≤ 3V
Device operation ≥ 3V
12.75
4.75
—
—
100
4
TBD
13.25
5.25
50
30
1000
—
—
V
V
mA
mA
µs
hrs
hrs
(Note 2)
Terminated via internal/external
interrupt or a RESET
See Table 32-3
See Table 32-3
Note 1: These specifications are for the programming of the on-chip program memory EEPROM through the use of
the table write instructions. The complete programming specifications can be found in: PIC18CXXX Programming
Specifications (Literature number DS39028).
2: The MCLR/VPP pin may be kept in this range at times other than programming, but is not recommended.
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature 0°C ≤ TA ≤ +70°C for commercial,
-40°C ≤ TA ≤ +85°C for industrial and
-40°C ≤ TA ≤ +125°C for extended
Operating voltage VDD range as described in DC spec Table 32-2.
Param
No. Symbol Characteristic Min Typ† Max Units Conditions
Data EEPROM Memory
D120 ED Endurance 1M 10M — E/W 25°C at 5V
D121 VDRW VDD for read/write VMIN — VMAX V VMIN = Minimum operating voltage
VMAX = Maximum operating voltage
D122 TDEW Erase/Write cycle time — — 10 ms
Program Flash Memory
D130 EP Endurance 100 1000 — E/W
D131 VPR VDD for read VMIN — VMAX V VMIN = Minimum operating voltage
VMAX = Maximum operating voltage
D132 VPEW VDD for erase/write 4.5 — 5.5 V
D133 TPEW Erase/Write cycle time — — 10 ms
† Data in “Typ” column is at 5.0V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
Legend: E/W means Erase/Write cycles.
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PIC18C Reference Manual
DS39533A-page 32-16 2000 Microchip Technology Inc.
32.12 Comparators and Voltage Reference
Table 32-11: Example Comparator Characteristics
Table 32-12: Example Voltage Reference Characteristics
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial and
-40°C ≤ TA ≤ +125°C for extended
Operating voltage VDD range as described in DC spec Table 32-2.
Param
No. Symbol Characteristics Min Max Units Comments
D300 VIOFF Input offset voltage — ± 10 mV
D301 VICM Input common mode voltage 0 VDD - 1.5 V
D302 CMRR Common Mode Rejection Ratio 35 — db
300 TRESP Response Time (1) PIC18CXXX — 400 ns
300A PIC18LCXXX — 600 ns
301 TMC2OV Comparator Mode Change to Output
Valid
— 10 µs
Note 1: Response time measured with one comparator input at (VDD - 1.5)/2, while the other input transitions from
VSS to VDD.
DC CHARACTERISTICS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial and
-40°C ≤ TA ≤ +125°C for extended
Operating voltage VDD range as described in DC spec Table 32-2.
Param
No. Symbol Characteristics Min Typ Max Units Comments
D310 VRES Resolution VDD/24 — VDD/32 V
D311 VRAA Absolute Accuracy —
—
—
—
1/4
1/2
LSb
LSb
Low Range (VRR = 1)
High Range (VRR = 0)
D312 VRUR Unit Resistor Value (R) — 2k — Ω
310 TSET Settling Time (1) — — 10 µs
Note 1: Settling time measured while VRR = 1 and VR3:VR0 transitions from 0000 to 1111.
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Section 32. Electrical Specifications
Electrical
Specifications
32
Table 32-13: Example Fixed Voltage Reference Characteristics
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C ≤ TA ≤ +85°C for industrial and
-40°C ≤ TA ≤ +125°C for extended
Operating voltage VDD range as described in DC spec Table 32-2.
Param
No. Symbol Characteristic Min Typ Max Units Conditions
D400 VRL Output Voltage 2.0 2.048 2.1 V VDD ≥ 2.5V
VRH 4.0 4.096 4.2 V VDD ≥ 4.5V
D402 TCVOUT Ouput Voltage Drift — 15 50 ppm/°C (Note 1)
D403 En Output Noise Voltage — TBD — µVp-p 0.1 Hz to 10 Hz
— TBD — 10 Hz to 10 kHz
D404 IVREFSO External Load Source — — 5 mA
D405 IVREFSI External Load Sink — — -5 mA
D406 Load Regulation — — TBD
mV/mA
Isource = 0 mA to
5 mA
— — TBD Isink = 0 mA to
5 mA
D407 Line Regulation — — 50 µV/V
D401A VRL Quiescent Supply Current — 30 50 µA VRH, BOR, and LVD
disabled. No load on
VRL.
D401B VRH Quiescent Supply Current — 30 50 µA VRL, BOR, and LVD
disabled. No load on
VRH.
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PIC18C Reference Manual
DS39533A-page 32-18 2000 Microchip Technology Inc.
32.13 Timing Parameter Symbology
The timing parameter symbols have been created with one of the following formats:
Figure 32-4: Example Load Conditions
1. TppS2ppS 3. TCC:ST (I2C specifications only)
2. TppS 4. Ts (I2
C specifications only)
T
F Frequency T Time
Lowercase letters (pp) and their meanings:
pp
cc CCP1 osc OSC1
ck CLKOUT rd RD
cs CS rw RD or WR
di SDI sc SCK
do SDO ss SS
dt Data in t0 T0CKI
io I/O port t1 T1CKI
mc MCLR wr WR
Uppercase letters and their meanings:
S
F Fall P Period
H High R Rise
I Invalid (Hi-impedance) V Valid
L Low Z Hi-impedance
I
2
C only
AA Output Access High High
BUF Bus free Low Low
TCC:ST (I2C specifications only)
CC
HD Hold SU Setup
ST
DAT DATA input hold STO STOP condition
STA START condition
VDD/2
CL
RL
Pin Pin
VSS VSS
CL
RL = 464Ω
CL = 50 pF for all pins except OSC2/CLKOUT
(works for I/O pin multiplexed on to OSC2/CLKOUT)
Load Condition 1 Load Condition 2
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2000 Microchip Technology Inc. DS39533A-page 32-19
Section 32. Electrical Specifications
Electrical
Specifications
32
32.14 Example External Clock Timing Waveforms and Requirements
Figure 32-5: Example External Clock Timing Waveforms
Table 32-14: Example External Clock Timing Requirements
Param.
No. Symbol Characteristic Min Max Units Conditions
1A Fosc External CLKIN Frequency (1) DC 4 MHz XT osc
DC 40 MHz HS osc
4 10 MHz HS4 osc
DC
DC
40
40
kHz
MHz
LP osc
EC
Oscillator Frequency (1) DC 4 MHz RC osc
0.1 4 MHz XT osc
4 25 MHz HS osc
4 10 MHz HS4 osc
5 200 kHz LP osc mode
1 Tosc External CLKIN Period (1) 250 — ns XT and RC osc
40 — ns HS osc
100 — ns HS4 osc
5
5
—
—
µs
ns
LP osc
EC
Oscillator Period (1) 250 — ns RC osc
250 10,000 ns XT osc
100
40
10,000
100
ns
ns
HS osc
HS4 osc
5 — µs LP osc
2 TCY Instruction Cycle Time (1) 100 — ns TCY = 4/FOSC
3 TosL,
TosH
External Clock in (OSC1)
High or Low Time 30 — ns XT osc
2.5 — µs LP osc
10 — ns HS osc
4 TosR,
TosF
External Clock in (OSC1)
Rise or Fall Time
— 20 ns XT osc
— 50 ns LP osc
— 7.5 ns HS osc
Note 1: Instruction cycle period (TCY) equals four times the input oscillator time-base period. All specified values are
based on characterization data for that particular oscillator type under standard operating conditions with
the device executing code. Exceeding these specified limits may result in an unstable oscillator operation
and/or higher than expected current consumption. All devices are tested to operate at "min." values with an
external clock applied to the OSC1/CLKIN pin.
When an external clock input is used, the "Max." cycle time limit is "DC" (no clock) for all devices.
OSC1
CLKOUT
Q4 Q1 Q2 Q3 Q4 Q1
1
2
3 3 4 4
39500 18C Reference Manual.book Page 19 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39533A-page 32-20 2000 Microchip Technology Inc.
32.15 Example Phase Lock Loop (PLL) Timing Waveforms and Requirements
Table 32-15: Example PLL Clock Timing Specification (VDD = 4.2V - 5.5V)
Param
No. Symbol Characteristic Min Max Units Conditions
7 TPLL PLL Start-up Time
(Lock Time)
— 2 ms
∆CLK CLKOUT Stability (Jitter) using PLL -2 +2 %
39500 18C Reference Manual.book Page 20 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39533A-page 32-21
Section 32. Electrical Specifications
Electrical
Specifications
32
Figure 32-6: Example CLKOUT and I/O Timing Waveforms
Table 32-16: Example CLKOUT and I/O Timing Requirements
Param.
No. Symbol Characteristic Min Typ Max Units Conditions
10 TosH2ckL OSC1↑ to CLKOUT↓ — 75 200 ns (Note 1)
11 TosH2ckH OSC1↑ to CLKOUT↑ — 75 200 ns (Note 1)
12 TckR CLKOUT rise time — 35 100 ns (Note 1)
13 TckF CLKOUT fall time — 35 100 ns (Note 1)
14 TckL2ioV CLKOUT ↓ to Port out valid — — 0.5TCY + 20 ns (Note 1)
15 TioV2ckH Port in valid before CLKOUT ↑ 0.25TCY + 25 — — ns (Note 1)
16 TckH2ioI Port in hold after CLKOUT ↑ 0 — — ns (Note 1)
17 TosH2ioV OSC1↑ (Q1 cycle) to Port out valid — 50 150 ns
18 TosH2ioI OSC1↑ (Q2 cycle) to
Port input invalid
(I/O in hold time)
PIC18CXXX 100 — — ns
18A PIC18LCXXX 200 — — ns
19 TioV2osH Port input valid to OSC1↑
(I/O in setup time)
0 — — ns
20 TioR Port output rise time PIC18CXXX — 10 25 ns
20A PIC18LCXXX — — 60 ns
21 TioF Port output fall time PIC18CXXX — 10 25 ns
21A PIC18LCXXX — — 60 ns
22†† Tinp INT pin high or low time TCY — — ns
23†† Trbp RB<7:4> change INT high or low time TCY — — ns
24†† Trcp RC<7:4> change INT high or low time 20 ns
†† These parameters are asynchronous events not related to any internal clock edges.
Note 1: Measurements are taken in RC Mode where CLKOUT output is 4 x TOSC.
Note: Refer to Figure 32-4 for load conditions.
OSC1
CLKOUT
I/O Pin
(input)
I/O Pin
(output)
Q4 Q1 Q2 Q3
10
13
14
17
20, 21
19 18
15
11
12
16
old value new value
39500 18C Reference Manual.book Page 21 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39533A-page 32-22 2000 Microchip Technology Inc.
32.16 Example Power-up and RESET Timing Waveforms and Requirements
Figure 32-7: Example RESET, Watchdog Timer, Oscillator Start-up Timer and Power-up Timer Timing Waveforms
Figure 32-8: Brown-out Reset Timing
Table 32-17: Example RESET, Watchdog Timer, Oscillator Start-up Timer, Brown-out Reset, and Power-up
Timer Requirements
Param.
No. Symbol Characteristic Min Typ Max Units Conditions
30 TmcL MCLR Pulse Width (low) 2 — — µs
31 TWDT Watchdog Timer Time-out
Period (No Prescaler)
7 18 33 ms
32 TOST Oscillation Start-up Timer Period 1024TOSC — 1024TOSC ns TOSC = OSC1 period
33 TPWRT Power up Timer Period 28 72 132 ms
34 TIOZ I/O Hi-impedance from MCLR
Low or Watchdog Timer Reset
— 2 — µs
35 TBOR Brown-out Reset Pulse Width 200 — — µs VDD ≤ VBOR (See D005)
36 TIVRST Time for Internal Reference
Voltage to become stable
— 20 50 µs
VDD
MCLR
Internal
POR
PWRT
Time-out
OSC
Time-out
Internal
RESET
Watchdog
Timer
RESET
33
32
30
31
34
I/O Pins
34
Note: Refer to Figure 32-4 for load conditions.
VDD
VBOR
35
VBGAP = 1.2V
VIRVST
Enable Internal Reference Voltage
Internal Reference Voltage stable 36
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2000 Microchip Technology Inc. DS39533A-page 32-23
Section 32. Electrical Specifications
Electrical
Specifications
32
32.17 Example Timer0 and Timer1 Timing Waveforms and Requirements
Figure 32-9: Example Timer0 and Timer1 External Clock Timings Waveforms
Table 32-18: Example Timer0 and Timer1 External Clock Requirements
Param
No. Symbol Characteristic Min Max Units Conditions
40 Tt0H T0CKI High Pulse Width No Prescaler 0.5TCY + 20 — ns
With Prescaler 10 — ns
41 Tt0L T0CKI Low Pulse Width No Prescaler 0.5TCY + 20 — ns
With Prescaler 10 — ns
42 Tt0P T0CKI Period No Prescaler TCY + 10 — ns
With Prescaler Greater of:
20 ns or TCY + 40
N
— ns N = prescale
value
(1, 2, 4,..., 256)
45 Tt1H T1CKI
High
Time
Synchronous, no prescaler 0.5TCY + 20 — ns
Synchronous,
with prescaler
PIC18CXXX 10 — ns
PIC18LCXXX 25 — ns
Asynchronous PIC18CXXX 30 — ns
PIC18LCXXX 50 — ns
46 Tt1L T1CKI
Low
Time
Synchronous, no prescaler 0.5TCY + 5 — ns
Synchronous,
with prescaler
PIC18CXXX 10 — ns
PIC18LCXXX 25 — ns
Asynchronous PIC18CXXX 30 — ns
PIC18LCXXX TBD TBD
47 Tt1P T1CKI
Input
Period
Synchronous Greater of:
20 ns or TCY + 40
N
— ns N = prescale
value
(1, 2, 4, 8)
Asynchronous 60 — ns
Ft1 T1CKI oscillator input frequency range DC 50 kHz
48 Tcke2tmrI Delay from external T1CKI clock edge to
timer increment
2Tosc 7Tosc ns
Note: Refer to Figure 32-4 for load conditions.
46
47
45
48
41
42
40
T0CKI
T1OSO/T1CKI
TMR0 or
TMR1
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PIC18C Reference Manual
DS39533A-page 32-24 2000 Microchip Technology Inc.
32.18 Example CCP Timing Waveforms and Requirements
Figure 32-10: Example Capture/Compare/PWM Timings Waveforms
Table 32-19: Example Capture/Compare/PWM Requirements
Param.
No. Symbol Characteristic Min Max Units Conditions
50 TccL CCPx input low
time
No Prescaler 0.5TCY + 20 — ns
With
Prescaler
PIC18CXXX 10 — ns
PIC18LCXXX 20 — ns
51 TccH CCPx input
high time
No Prescaler 0.5TCY + 20 — ns
With
Prescaler
PIC18CXXX 10 — ns
PIC18LCXXX 20 — ns
52 TccP CCPx input period 3TCY + 40
N
— ns N = prescale
value (1, 4 or 16)
53 TccR CCPx output rise time PIC18CXXX — 25 ns
PIC18LCXXX — 45 ns
54 TccF CCPx output fall time PIC18CXXX — 25 ns
PIC18LCXXX — 45 ns
Note: Refer to Figure 32-4 for load conditions.
(Capture Mode)
50 51
52
53 54
CCPx
CCPx
(Compare or PWM Mode)
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2000 Microchip Technology Inc. DS39533A-page 32-25
Section 32. Electrical Specifications
Electrical
Specifications
32
32.19 Example Parallel Slave Port (PSP) Timing Waveforms and Requirements
Figure 32-11: Example Parallel Slave Port Timing Waveforms
Table 32-20: Example Parallel Slave Port Requirements
Param.
No. Symbol Characteristic Min Max Units Conditions
62 TdtV2wrH Data-in valid before WR↑ or CS↑
(setup time)
20
25
—
—
ns
ns Extended Temp range
63 TwrH2dtI WR↑ or CS↑ to data-in invalid
(hold time)
PIC18CXXX 20 — ns
PIC18LCXXX 35 — ns
64 TrdL2dtV RD↓ and CS↓ to data-out valid —
—
80
90
ns
ns Extended Temp range
65 TrdH2dtI RD↑ or CS↓ to data-out invalid 10 30 ns
66 TibfINH Inhibit of the IBF flag bit being cleared from
WR↑ or CS↑
— 3TCY ns
Note: Refer to Figure 32-4 for load conditions.
RE2/CS
RE0/RD
RE1/WR
RD<7:0>
62
63
64
65
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PIC18C Reference Manual
DS39533A-page 32-26 2000 Microchip Technology Inc.
32.20 Example SSP and Master SSP SPI Mode Timing Waveforms and Requirements
Figure 32-12: Example SPI Master Mode Timing (CKE = 0)
Table 32-21: Example SPI Mode Requirements (Master Mode, CKE = 0)
Param.
No. Symbol Characteristic Min Max Units Conditions
70 TssL2scH,
TssL2scL
SS↓ to SCK↓ or SCK↑ input TCY — ns
71 TscH SCK input high time
(slave mode)
Continuous 1.25TCY + 30 — ns
71A Single Byte 40 — ns (Note 1)
72 TscL SCK input low time
(slave mode)
Continuous 1.25TCY + 30 — ns
72A Single Byte 40 — ns (Note 1)
73 TdiV2scH,
TdiV2scL
Setup time of SDI data input to SCK edge 100 — ns
73A TB2B Last clock edge of Byte1 to the 1st clock edge
of Byte2
1.5TCY + 40 — ns (Note 2)
74 TscH2diL,
TscL2diL
Hold time of SDI data input to SCK edge 100 — ns
75 TdoR SDO data output rise time PIC18CXXX — 25 ns
PIC18LCXXX — 45 ns
76 TdoF SDO data output fall time — 25 ns
78 TscR SCK output rise time
(master mode)
PIC18CXXX — 25 ns
PIC18LCXXX — 45 ns
79 TscF SCK output fall time (master mode) — 25 ns
80 TscH2doV,
TscL2doV
SDO data output valid after
SCK edge
PIC18CXXX — 50 ns
PIC18LCXXX — 100 ns
Note 1: Requires the use of Parameter # 73A.
2: Only if Parameter #s 71A and 72A are used.
SS
SCK
(CKP = 0)
SCK
(CKP = 1)
SDO
SDI
70
71 72
73
74
75, 76
79 78 80
78 79
MSb LSb BIT6 - - - - - -1
MSb IN BIT6 - - - -1 LSb IN
Note: Refer to Figure 32-4 for load conditions.
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2000 Microchip Technology Inc. DS39533A-page 32-27
Section 32. Electrical Specifications
Electrical
Specifications
32
Figure 32-13: Example SPI Master Mode Timing (CKE = 1)
Table 32-22: Example SPI Mode Requirements (Master Mode, CKE = 1)
Param.
No. Symbol Characteristic Min Max Units Conditions
71 TscH SCK input high time
(slave mode)
Continuous 1.25TCY + 30 — ns
71A Single Byte 40 — ns (Note 1)
72 TscL SCK input low time
(slave mode)
Continuous 1.25TCY + 30 — ns
72A Single Byte 40 — ns (Note 1)
73 TdiV2scH,
TdiV2scL
Setup time of SDI data input to SCK edge 100 — ns
73A TB2B Last clock edge of Byte1 to the 1st clock edge
of Byte2
1.5TCY + 40 — ns (Note 2)
74 TscH2diL,
TscL2diL
Hold time of SDI data input to SCK edge 100 — ns
75 TdoR SDO data output rise time PIC18CXXX — 25 ns
PIC18LCXXX — 45 ns
76 TdoF SDO data output fall time — 25 ns
78 TscR SCK output rise time
(master mode)
PIC18CXXX — 25 ns
PIC18LCXXX — 45 ns
79 TscF SCK output fall time (master mode) — 25 ns
80 TscH2doV,
TscL2doV
SDO data output valid after
SCK edge
PIC18CXXX — 50 ns
PIC18LCXXX — 100 ns
81 TdoV2scH,
TdoV2scL
SDO data output setup to SCK edge TCY — ns
Note 1: Requires the use of Parameter # 73A.
2: Only if Parameter #s 71A and 72A are used.
SS
SCK
(CKP = 0)
SCK
(CKP = 1)
SDO
SDI
81
71 72
74
75, 76
78
80
MSb
79
73
MSb IN
BIT6 - - - - - -1
BIT6 - - - -1 LSb IN
LSb
Note: Refer to Figure 32-4 for load conditions.
39500 18C Reference Manual.book Page 27 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39533A-page 32-28 2000 Microchip Technology Inc.
Figure 32-14: Example SPI Slave Mode Timing (CKE = 0)
Table 32-23: Example SPI Mode Requirements (Slave Mode Timing (CKE = 0)
Param.
No. Symbol Characteristic Min Max Units Conditions
70 TssL2scH,
TssL2scL
SS↓ to SCK↓ or SCK↑ input TCY — ns
71 TscH SCK input high time
(slave mode)
Continuous 1.25TCY + 30 — ns
71A Single Byte 40 — ns (Note 1)
72 TscL SCK input low time
(slave mode)
Continuous 1.25TCY + 30 — ns
72A Single Byte 40 — ns (Note 1)
73 TdiV2scH,
TdiV2scL
Setup time of SDI data input to SCK edge 100 — ns
73A TB2B Last clock edge of Byte1 to the 1st clock edge
of Byte2
1.5TCY + 40 — ns (Note 2)
74 TscH2diL,
TscL2diL
Hold time of SDI data input to SCK edge 100 — ns
75 TdoR SDO data output rise time PIC18CXXX — 25 ns
PIC18LCXXX — 45 ns
76 TdoF SDO data output fall time — 25 ns
77 TssH2doZ SS↑ to SDO output hi-impedance 10 50 ns
78 TscR SCK output rise time
(master mode)
PIC18CXXX — 25 ns
PIC18LCXXX — 45 ns
79 TscF SCK output fall time (master mode) — 25 ns
80 TscH2doV,
TscL2doV
SDO data output valid after
SCK edge
PIC18CXXX — 50 ns
PIC18LCXXX — 100 ns
83 TscH2ssH,
TscL2ssH
SS ↑ after SCK edge 1.5TCY + 40 — ns
Note 1: Requires the use of Parameter # 73A.
2: Only if Parameter #s 71A and 72A are used.
SS
SCK
(CKP = 0)
SCK
(CKP = 1)
SDO
SDI
70
71 72
73
74
75, 76 77
79 78 80
78 79
SDI
MSb LSb BIT6 - - - - - -1
MSb IN BIT6 - - - -1 LSb IN
83
Note: Refer to Figure 32-4 for load conditions.
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Section 32. Electrical Specifications
Electrical
Specifications
32
Figure 32-15: Example SPI Slave Mode Timing (CKE = 1)
Table 32-24: Example SPI Slave Mode Mode Requirements (CKE = 1)
Param.
No. Symbol Characteristic Min Max Units Conditions
70 TssL2scH,
TssL2scL
SS↓ to SCK↓ or SCK↑ input TCY — ns
71 TscH SCK input high time
(slave mode)
Continuous 1.25TCY + 30 — ns
71A Single Byte 40 — ns (Note 1)
72 TscL SCK input low time
(slave mode)
Continuous 1.25TCY + 30 — ns
72A Single Byte 40 — ns (Note 1)
73A TB2B Last clock edge of Byte1 to the 1st clock edge
of Byte2
1.5TCY + 40 — ns (Note 2)
74 TscH2diL,
TscL2diL
Hold time of SDI data input to SCK edge 100 — ns
75 TdoR SDO data output rise time PIC18CXXX — 25 ns
PIC18LCXXX — 45 ns
76 TdoF SDO data output fall time — 25 ns
77 TssH2doZ SS↑ to SDO output hi-impedance 10 50 ns
78 TscR SCK output rise time
(master mode)
PIC18CXXX — 25 ns
PIC18LCXXX — 45 ns
79 TscF SCK output fall time (master mode) — 25 ns
80 TscH2doV,
TscL2doV
SDO data output valid after
SCK edge
PIC18CXXX — 50 ns
PIC18LCXXX — 100 ns
82 TssL2doV SDO data output valid after
SS↓ edge
PIC18CXXX — 50 ns
PIC18LCXXX — 100 ns
83 TscH2ssH,
TscL2ssH
SS ↑ after SCK edge 1.5TCY + 40 — ns
Note 1: Requires the use of Parameter # 73A.
2: Only if Parameter #s 71A and 72A are used.
SS
SCK
(CKP = 0)
SCK
(CKP = 1)
SDO
SDI
70
71 72
82
74
75, 76
MSb BIT6 - - - - - -1 LSb
77
MSb IN BIT6 - - - -1 LSb IN
80
83
Note: Refer to Figure 32-4 for load conditions.
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PIC18C Reference Manual
DS39533A-page 32-30 2000 Microchip Technology Inc.
32.21 Example SSP I2C Mode Timing Waveforms and Requirements
Figure 32-16: Example SSP I2C Bus Start/Stop Bits Timing Waveforms
Table 32-25: Example SSP I2C Bus Start/Stop Bits Requirements (Slave Mode)
Param.
No. Symbol Characteristic Min Max Units Conditions
90 TSU:STA START condition 100 kHz mode 4700 — ns Only relevant for repeated
Setup time 400 kHz mode 600 — START condition
91 THD:STA START condition 100 kHz mode 4000 — ns After this period the first
Hold time 400 kHz mode 600 — clock pulse is generated
92 TSU:STO STOP condition 100 kHz mode 4700 — ns
Setup time 400 kHz mode 600 —
93 THD:STO STOP condition 100 kHz mode 4000 — ns
Hold time 400 kHz mode 600 —
Note: Refer to Figure 32-4 for load conditions.
91 93
SCL
SDA
START
Condition
STOP
Condition
90 92
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Section 32. Electrical Specifications
Electrical
Specifications
32
Figure 32-17: Example SSP I2
C Bus Data Timing Waveforms
Table 32-26: Example SSP I2C bus Data Requirements (Slave Mode)
Param.
No. Symbol Characteristic Min Max Units Conditions
100 THIGH Clock high time 100 kHz mode 4.0 — µs PIC18CXXX must operate
at a minimum of 1.5 MHz
400 kHz mode 0.6 — µs PIC18CXXX must operate
at a minimum of 10 MHz
SSP Module 1.5TCY — ns
101 TLOW Clock low time 100 kHz mode 4.7 — µs PIC18CXXX must operate
at a minimum of 1.5 MHz
400 kHz mode 1.3 — µs PIC18CXXX must operate
at a minimum of 10 MHz
SSP Module 1.5TCY — ns
102 TR SDA and SCL rise
time
100 kHz mode — 1000 ns
400 kHz mode 20 + 0.1Cb 300 ns Cb is specified to be from
10 to 400 pF
103 TF SDA and SCL fall
time
100 kHz mode — 300 ns
400 kHz mode 20 + 0.1Cb 300 ns Cb is specified to be from
10 to 400 pF
90 TSU:STA START condition
setup time
100 kHz mode 4.7 — µs Only relevant for repeated
400 kHz mode 0.6 — µs START condition
91 THD:STA START condition
hold time
100 kHz mode 4.0 — µs After this period the first
400 kHz mode 0.6 — µs clock pulse is generated
106 THD:DAT Data input hold
time
100 kHz mode 0 — ns
400 kHz mode 0 0.9 µs
107 TSU:DAT Data input setup
time
100 kHz mode 250 — ns (Note 2)
400 kHz mode 100 — ns
92 TSU:STO STOP condition
setup time
100 kHz mode 4.7 — µs
400 kHz mode 0.6 — µs
109 TAA Output valid from
clock
100 kHz mode — 3500 ns (Note 1)
400 kHz mode — — ns
110 TBUF Bus free time 100 kHz mode 4.7 — µs Time the bus must be free
before a new transmission
can start
400 kHz mode 1.3 — µs
D102 Cb Bus capacitive loading — 400 pF
Note 1: As a transmitter, the device must provide this internal minimum delay time to bridge the undefined region
(min. 300 ns) of the falling edge of SCL to avoid unintended generation of START or STOP conditions.
2: A fast-mode I2C-bus device can be used in a standard-mode I2C-bus system, but the requirement
tsu;DAT ≥ 250 ns must then be met. This will automatically be the case if the device does not stretch the
LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output
the next data bit to the SDA line.
TR max. + tsu;DAT = 1000 + 250 = 1250 ns (according to the standard-mode I2C bus specification) before
the SCL line is released.
90 91 92
100
101
103
106 107
109 109 110
102
SCL
SDA
In
SDA
Out
Note: Refer to Figure 32-4 for load conditions.
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PIC18C Reference Manual
DS39533A-page 32-32 2000 Microchip Technology Inc.
32.22 Example Master SSP I2C Mode Timing Waveforms and Requirements
Figure 32-18: Example Master SSP I2C Bus Start/Stop Bits Timing Waveforms
Table 32-27: Example Master SSP I2C Bus Start/Stop Bits Requirements
Param.
No. Symbol Characteristic Min Max Units Conditions
90 TSU:STA START condition 100 kHz mode 2(TOSC)(BRG + 1) § —
ns
Only relevant for
repeated START
condition
Setup time 400 kHz mode 2(TOSC)(BRG + 1) § —
1 MHz mode (1) 2(TOSC)(BRG + 1) § —
91 THD:STA START condition 100 kHz mode 2(TOSC)(BRG + 1) § —
ns
After this period the
first clock pulse is
generated
Hold time 400 kHz mode 2(TOSC)(BRG + 1) § —
1 MHz mode (1) 2(TOSC)(BRG + 1) § —
92 TSU:STO STOP condition 100 kHz mode 2(TOSC)(BRG + 1) § —
Setup time 400 kHz mode 2(TOSC)(BRG + 1) § — ns
1 MHz mode (1) 2(TOSC)(BRG + 1) § —
93 THD:STO STOP condition 100 kHz mode 2(TOSC)(BRG + 1) § —
Hold time 400 kHz mode 2(TOSC)(BRG + 1) § — ns
1 MHz mode (1) 2(TOSC)(BRG + 1) § —
§ For the value required by the I2C specification, please refer to Figure A-11 of the “Appendix.”
Note 1: Maximum pin capacitance = 10 pF for all I2C pins.
Note: Refer to Figure 32-4 for load conditions.
91 93
SCL
SDA
START
Condition
STOP
Condition
90 92
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2000 Microchip Technology Inc. DS39533A-page 32-33
Section 32. Electrical Specifications
Electrical
Specifications
32
Figure 32-19: Example Master SSP I2C Bus Data Timing
Table 32-28: Example Master SSP I2C Bus Data Requirements
Param.
No. Symbol Characteristic Min Max Units Conditions
100 THIGH Clock high time 100 kHz mode 2(TOSC)(BRG + 1) § — ms
400 kHz mode 2(TOSC)(BRG + 1) § — ms
1 MHz mode (1) 2(TOSC)(BRG + 1) § — ms
101 TLOW Clock low time 100 kHz mode 2(TOSC)(BRG + 1) § — ms
400 kHz mode 2(TOSC)(BRG + 1) § — ms
1 MHz mode (1) 2(TOSC)(BRG + 1) § — ms
102 TR SDA and SCL
rise time
100 kHz mode — 1000 ns Cb is specified to be from
400 kHz mode 20 + 0.1Cb 300 ns 10 to 400 pF
1 MHz mode (1) — 300 ns
103 TF SDA and SCL
fall time
100 kHz mode — 300 ns Cb is specified to be from
400 kHz mode 20 + 0.1Cb 300 ns 10 to 400 pF
1 MHz mode (1) — 100 ns
90 TSU:STA START condition
setup time
100 kHz mode 2(TOSC)(BRG + 1) § — ms Only relevant for
repeated START
condition
400 kHz mode 2(TOSC)(BRG + 1) § — ms
1 MHz mode (1) 2(TOSC)(BRG + 1) § — ms
91 THD:STA START condition
hold time
100 kHz mode 2(TOSC)(BRG + 1) § — ms After this period the first
400 kHz mode 2(TOSC)(BRG + 1) § — ms clock pulse is generated
1 MHz mode (1) 2(TOSC)(BRG + 1) § — ms
106 THD:DAT Data input
hold time
100 kHz mode 0 — ns
400 kHz mode 0 0.9 ms
1 MHz mode (1) TBD — ns
107 TSU:DAT Data input
setup time
100 kHz mode 250 — ns (Note 2)
400 kHz mode 100 — ns
1 MHz mode (1) TBD — ns
92 TSU:STO STOP condition
setup time
100 kHz mode 2(TOSC)(BRG + 1) § — ms
400 kHz mode 2(TOSC)(BRG + 1) § — ms
1 MHz mode (1) 2(TOSC)(BRG + 1) § — ms
109 TAA Output valid from
clock
100 kHz mode — 3500 ns
400 kHz mode — 1000 ns
1 MHz mode (1) — — ns
110 TBUF Bus free time 100 kHz mode 4.7 ‡ — ms Time the bus must be
free before a new transmission
can start
400 kHz mode 1.3 ‡ — ms
1 MHz mode (1) TBD — ms
D102 Cb Bus capacitive loading — 400 pF
§ For the value required by the I2C specification, please refer to Figure A-11 of the “Appendix.”
Note 1: Maximum pin capacitance = 10 pF for all I2C pins.
2: A fast-mode I2C-bus device can be used in a standard-mode I2C-bus system, but parameter 107 ≥ 250 ns
must then be met. This will automatically be the case if the device does not stretch the LOW period of the
SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output the next data bit to
the SDA line. Parameter 102.+ parameter 107 = 1000 + 250 = 1250 ns (for 100 kHz-mode) before the SCL
line is released.
90 91 92
100
101
103
106 107
109 109 110
102
SCL
SDA
In
SDA
Out
Note: Refer to Figure 32-4 for load conditions.
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PIC18C Reference Manual
DS39533A-page 32-34 2000 Microchip Technology Inc.
32.23 Example USART/SCI Timing Waveforms and Requirements
Figure 32-20: Example USART Synchronous Transmission (Master/Slave) Timing Waveforms
Table 32-29: Example USART Synchronous Transmission Requirements
Figure 32-21: Example USART Synchronous Receive (Master/Slave) Timing Waveforms
Table 32-30: Example USART Synchronous Receive Requirements
Param.
No. Symbol Characteristic Min Max Units Conditions
120 TckH2dtV SYNC XMIT (MASTER & SLAVE)
Clock high to data out valid PIC18CXXX — 40 ns
PIC18LCXXX — 100 ns
121 Tckrf Clock out rise time and fall time
(Master Mode)
PIC18CXXX — 20 ns
PIC18LCXXX — 50 ns
122 Tdtrf Data out rise time and fall time PIC18CXXX — 20 ns
PIC18LCXXX — 50 ns
Param.
No. Symbol Characteristic Min Max Units Conditions
125 TdtV2ckl SYNC RCV (MASTER & SLAVE)
Data hold before CK ↓ (DT hold time) 10 — ns
126 TckL2dtl Data hold after CK ↓ (DT hold time) 15 — ns
Note: Refer to Figure 32-4 for load conditions.
121
121
122
TX/CK Pin
RX/DT Pin
120
Note: Refer to Figure 32-4 for load conditions.
125
126
TX/CK pin
RX/DT pin
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2000 Microchip Technology Inc. DS39533A-page 32-35
Section 32. Electrical Specifications
Electrical
Specifications
32
32.24 CAN Specifications
Figure 32-22: Example CAN Timing Waveforms
Table 32-31: Example CAN Timing
Param.
No. Symbol Characteristic Min Typ † Max Units Conditions
20
20A
TioR Port output rise time (1) PIC18CXXX — 10 25 ns
PIC18LCXXX — — 60 ns
21
21A
TioF Port output fall time (1) PIC18CXXX — 10 25 ns
PIC18LCXXX — — 60 ns
500 Tcanclk2ioV CANCLK ↓ or CANCLK ↑
to Port out valid
-20 — 20 ns
501 TrxcanL Wake-up noise filter 50 — — ns
† These parameters are asynchronous events not related to any internal clock edges.
Note 1: The CAN Clock is driven by the I/O pin drivers, so it has the same timing specification.
Note: Refer to Figure 32-4 for load conditions.
13
14
20, 21
12
Bit A Bit B Bit C
CANTX0 Pin
(output)
CANTX1 Pin
(TX1SRL = 1)
(TX1EN = 1)
(ENDRHI = 1)
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PIC18C Reference Manual
DS39533A-page 32-36 2000 Microchip Technology Inc.
32.25 Example 8-bit A/D Timing Waveforms and Requirements
Table 32-32: Example 8-bit A/D Converter Characteristics
Param
No. Symbol Characteristic Min Typ Max Units Conditions
A01 NR Resolution (2) —
—
—
—
8
8
bits
bits
VREF = VDD ≥ 3.0V
VREF = VDD = 2.5V
A02 EABS Total Absolute error (2) —
—
—
—
<±1
TBD
LSb
LSb
VREF = VDD ≥ 3.0V
VREF = VDD = 2.5V
A03 EIL Integral linearity error (2) —
—
—
—
<±1
TBD
LSb
LSb
VREF = VDD ≥ 3.0V
VREF = VDD = 2.5V
A04 EDL Differential linearity error (2) —
—
—
—
<±1
TBD
LSb
LSb
VREF = VDD ≥ 3.0V
VREF = VDD = 2.5V
A05 EFS Full scale error (2) —
—
—
—
<±1
TBD
LSb
LSb
VREF = VDD ≥ 3.0V
VREF = VDD = 2.5V
A06 EOFF Offset error (2) —
—
—
—
<±1
TBD
LSb
LSb
VREF = VDD ≥ 3.0V
VREF = VDD = 2.5V
A10 — Monotonicity guaranteed (3) — VSS ≤ VAIN ≤ VREF
A20 VREF Reference voltage 0V — AVDD V VREF delta when changing
voltage levels on VREF
inputs
A20A (VREFH - VREFL) 3.0V — AVDD V Absolute minimum electrical
specification to ensure
10-bit accuracy
A21 VREF+ Reference voltage high AVSS + 3.0 AVDD + 0.3 V
A22 VREF- Reference voltage low AVSS - 0.3 AVDD - 3.0 V
A25 VAIN Analog input voltage AVSS - 0.3 — AVREF + 0.3 V
A30 ZAIN Impedance of analog
voltage source
— — 10.0 kΩ
A40 IAD A/D
conversion
current (VDD)
PIC18CXXX — 180 — µA Average current consumption
when A/D is on (1) PIC18LCXXX — 90 — µA
A50 IREF VREF input current (2) 10 — 1000 µA During VAIN acquisition.
Based on differential of
VHOLD to VAIN to charge
CHOLD. See the A/D
Converter section.
— — 10 µA During A/D Conversion
cycle
Note 1: When A/D is off, it will not consume any current other than minor leakage current.
The power-down current spec includes any such leakage from the A/D module.
VREF current is from RA3 pin or VDD pin, whichever is selected as reference input.
2: VSS ≤ VAIN ≤ VREF
3: The A/D conversion result either increases or remains constant as the analog input increases.
39500 18C Reference Manual.book Page 36 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39533A-page 32-37
Section 32. Electrical Specifications
Electrical
Specifications
32
Figure 32-23: Example 8-bit A/D Conversion Timing Waveforms
Table 32-33: Example 8-bit A/D Conversion Requirements
Param
No. Symbol Characteristic Min Max Units Conditions
130 TAD A/D clock period PIC18CXXX 1.6 — µs TOSC based, VREF ≥ 3.0V
PIC18LCXXX 2.0 — µs TOSC based, VREF full range
PIC18CXXX 2.0 6.0 µs A/D RC Mode
PIC18LCXXX 3.0 9.0 µs A/D RC Mode
131 TCNV Conversion time
(not including S/H time) (1)
11 11 TAD
132 TACQ Acquisition time Note 2 — µs
134 TGO Q4 to A/D clock start 2TOSC 2TOSC — If the A/D clock source is
selected as RC, a time of TCY
is added before the A/D clock
starts. This allows the SLEEP
instruction to be executed.
135 TSWC Switching Time from convert → sample 1 1 TAD
136 TAMP Amplifier settling time (2) 1 (5) — µs This may be used if the “new”
input voltage has not changed
by more than 1LSb (i.e., 5 (20)
mV @ 5.12V) from the last
sampled voltage (as stated on
CHOLD).
Note 1: ADRES register may be read on the following TCY cycle.
2: See the A/D Converter section for minimum requirements.
131
130
132
BSF ADCON0, GO
Q4
A/D CLK
A/D DATA
ADRES
ADIF
GO
SAMPLE
OLD_DATA
SAMPLING STOPPED
DONE
NEW_DATA
(TOSC/2) (1)
7 6 5432 10
Note 1: If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts. This
allows the SLEEP instruction to be executed.
1 TCY
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PIC18C Reference Manual
DS39533A-page 32-38 2000 Microchip Technology Inc.
32.26 Example 10-bit A/D Timing Waveforms and Requirements
Table 32-34: Example 10-bit A/D Converter Characteristics
Param
No. Symbol Characteristic Min Typ Max Units Conditions
A01 NR Resolution —
—
—
—
10
TBD
bit
bit
VREF = VDD ≥ 3.0V
VREF = VDD < 3.0V
A03 EIL Integral linearity error —
—
—
—
< ±1
TBD
LSb
LSb
VREF = VDD ≥ 3.0V
VREF = VDD < 3.0V
A04 EDL Differential linearity error —
—
—
—
< ±1
TBD
LSb
LSb
VREF = VDD ≥ 3.0V
VREF = VDD < 3.0V
A05 EFS Full scale error —
—
—
—
< ±1
TBD
LSb
LSb
VREF = VDD ≥ 3.0V
VREF = VDD < 3.0V
A06 EOFF Offset error —
—
—
—
< ±1
TBD
LSb
LSb
VREF = VDD ≥ 3.0V
VREF = VDD < 3.0V
A10 — Monotonicity guaranteed (3) — VSS ≤ VAIN ≤ VREF
A20 VREF Reference voltage
(VREFH - VREFL)
0V — — V
A20A 3V — — V For 10-bit resolution
A21 VREFH Reference voltage High AVSS — AVDD + 0.3V V
A22 VREFL Reference voltage Low AVSS - 0.3V — AVDD V
A25 VAIN Analog input voltage AVSS - 0.3V — VREF + 0.3V V
A30 ZAIN Recommended impedance of
analog voltage source
— — 10.0 kΩ
A40 IAD A/D conversion
current (VDD)
PIC18CXXX — 180 — µA Average current
consumption when
A/D is on (1)
PIC18LCXXX — 90 — µA
A50 IREF VREF input current (Note 2) 10
—
—
—
1000
10
µA
µA
During VAIN acquisition.
Based on differential of
VHOLD to VAIN. To charge
CHOLD see the “10-bit
A/D Converter” section.
During A/D conversion
cycle.
Note 1: When A/D is off, it will not consume any current other than minor leakage current. The power-down current
spec includes any such leakage from the A/D module.
VREF current is from RG0 and RG1 pins or AVDD and AVSS pins, whichever is selected as reference input.
2: VSS ≤ VAIN ≤ VREF.
3: The A/D conversion result either increases or remains constant as the analog input increases.
39500 18C Reference Manual.book Page 38 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39533A-page 32-39
Section 32. Electrical Specifications
Electrical
Specifications
32
Figure 32-24: Example 10-bit A/D Conversion Timing Waveforms
Table 32-35: Example 10-bit A/D Conversion Requirements
Param
No. Symbol Characteristic Min Max Units Conditions
130 TAD A/D clock period PIC18CXXX 1.6 20 (5) µs TOSC based, VREF ≥ 3.0V
PIC18LCXXX 3.0 20 (5) µs TOSC based, VREF full range
PIC18CXXX 2.0 6.0 µs A/D RC Mode
PIC18LCXXX 3.0 9.0 µs A/D RC Mode
131 TCNV Conversion time
(not including acquisition time) (1)
11 § 12 § TAD
132 TACQ Acquisition time (3) 15
10
—
—
µs
µs
-40°C ≤ Temp ≤ 125°C
0°C ≤ Temp ≤ 125°C
135 TSWC Switching Time from convert → sample — Note 4
136 TAMP Amplifier settling time (2) 1 — µs This may be used if the
“new” input voltage has not
changed by more than 1LSb
(i.e., 5 mV @ 5.12V) from
the last sampled voltage (as
stated on CHOLD).
Note 1: ADRES register may be read on the following TCY cycle.
2: See the “10-bit A/D Converter” section for minimum conditions when input voltage has changed more than
1 LSb.
3: The time for the holding capacitor to acquire the “New” input voltage when the voltage changes full scale
after the conversion (AVDD to AVSS, or AVSS to AVDD). The source impedance (RS) on the input channels is
50 Ω.
4: On the next Q4 cycle of the device clock.
5: The time of the A/D clock period is dependent on the device frequency and the TAD clock divider.
131
130
132
BSF ADCON0, GO
Q4
A/D CLK
A/D DATA
ADRES
ADIF
GO
SAMPLE
OLD_DATA
SAMPLING STOPPED
DONE
NEW_DATA
(Note 2)
9 87 2 1 0
Note 1: If the A/D clock source is selected as RC, a time of TCY is added before the A/D clock starts.
This allows the SLEEP instruction to be executed.
2: This is a minimal RC delay (typically 100 nS), which also disconnects the holding capacitor from the
analog input.
... ...
TCY
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DS39533A-page 32-40 2000 Microchip Technology Inc.
32.27 Design Tips
No related design tips at this time.
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2000 Microchip Technology Inc. DS39533A-page 32-41
Section 32. Electrical Specifications
Electrical
Specifications
32
32.28 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced MCU family (that is, they may be written
for the Base-Line, the Mid-Range, or High-End families), but the concepts are pertinent, and
could be used (with modification and possible limitations). The current application notes related
to the Electrical Specifications are:
Title Application Note #
No related Application Notes at this time.
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
39500 18C Reference Manual.book Page 41 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39533A-page 32-42 2000 Microchip Technology Inc.
32.29 Revision History
Revision A
This is the initial released revision of the Electrical Specifications description.
39500 18C Reference Manual.book Page 42 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39534A-page 33-1
Device
Characteristics
33
Section 33. Device Characteristics
HIGHLIGHTS
33.1 Introduction .................................................................................................................. 33-2
33.2 Characterization vs. Electrical Specification ................................................................ 33-2
33.3 DC and AC Characteristics Graphs and Tables ........................................................... 33-2
33.4 Revision History ......................................................................................................... 33-26
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DS39534A-page 33-2 2000 Microchip Technology Inc.
33.1 Introduction
Microchip Technology Inc. provides characterization information on the devices that it manufactures.
This information becomes available after the devices have undergone a complete characterization
and the data has been analyzed. This data is taken on both device testers and on
bench setups. The characterization data gives the designer a better understanding of the device
characteristics, to better judge the acceptability of the device to the application.
33.2 Characterization vs. Electrical Specification
The difference between this information and the Electrical specifications can be classified as
what the user should expect the devices to do vs. what Microchip tests the devices to do. The
characterization graphs and tables provided are for design guidance and are not tested nor guaranteed.
There may be differences between what the characterization shows as the limits vs. that which
is tested, as shown in the Electrical Specification section. This results from capabilities of the
production tester equipment, plus whatever guard band that may be necessary.
33.3 DC and AC Characteristics Graphs and Tables
Each table gives specific information that may be useful design information. These values are
taken under fixed circumstances. Measurements taken in your application may not lead to the
same values if your circumstances are not the same.
In some graphs or tables the data presented are outside specified operating range (i.e., outside
specified VDD range). This is for information only and devices will operate properly only within the
specified range.
Note: The data presented in the device Data Sheet Characterization section is a statistical
summary of data collected on units from different lots over a period of time and
matrix samples. 'Typical' represents the mean of the distribution at, 25°C, while
'max' or 'min' represents (mean +3σ) and (mean -3σ) respectively, where σ is standard
deviation.
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2000 Microchip Technology Inc. DS39534A-page 33-3
Section 33. Device Characteristics
Device
Characteristics
33
33.3.1 IPD vs. VDD
IPD is the current (I) that the device consumes when the device is in SLEEP mode (power-down),
referred to as Power-down Current. These tests are taken with all I/O as inputs, either pulled high
or low. That is, there are no floating inputs, nor are any pins driving an output (with a load).
The characterization shows graphs for both the Watchdog Timer (WDT) disabled and enabled.
This is required since the WDT requires an on-chip RC oscillator which consumes additional current.
The device may have certain features and modules that can operate while the device is in SLEEP
mode. Some of these modules are:
• Watchdog Timer (WDT)
• Brown-out Reset (BOR) circuitry
• Timer1
• Analog to Digital converter
• LCD module
• Comparators
• Voltage Reference
If these features are operating while the device is in SLEEP mode, a higher current will be consumed.
When all features are disabled, the device will consume the lowest possible current (the
leakage current). If more then one feature is enabled, then the expected current can easily be
calculated as the base current (everything disabled and in SLEEP mode), plus all delta currents.
Example 33-1 shows an example of calculating the typical currents for a device at 5V, with the
WDT and Timer1 oscillator enabled.
Example 33-1: IPD Calculations with WDT and Timer1 Oscillator Enabled (@ 5V)
Base Current 14 nA ; Device leakage current
WDT Delta Current 14 µA ; 14 µA - 14 nA = 14 µA
Timer1 Delta Current 22 µA ; 22 µA - 14 nA = 22 µA
Total SLEEP Current 36 µA ;
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DS39534A-page 33-4 2000 Microchip Technology Inc.
Figure 33-1: Example Typical IPD vs. VDD (WDT Disabled, RC Mode)
Figure 33-2: Example Maximum IPD vs. VDD (WDT Disabled, RC Mode)
35
30
25
20
15
10
5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
IPD (nA)
VDD (Volts)
IPD (µA)
VDD (Volts)
10.000
1.000
0.100
0.010
0.001
2.5 3.0 3.5 4.0 4.5 5.0 5.5
85°C
70°C
25°C
0°C
-40°C
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2000 Microchip Technology Inc. DS39534A-page 33-5
Section 33. Device Characteristics
Device
Characteristics
33
Figure 33-3: Example Typical IPD vs. VDD @ 25°C (WDT Enabled, RC Mode)
Figure 33-4: Example Maximum IPD vs. VDD (WDT Enabled, RC Mode)
25
20
15
10
5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
IPD (µA)
VDD (Volts)
35
30
25
20
15
10
5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
IPD (µA)
VDD (Volts)
-40°C
0°C
70°C
85°C
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DS39534A-page 33-6 2000 Microchip Technology Inc.
Figure 33-5: Example Typical IPD vs. VDD Brown-out Detect Enabled (RC Mode)
Figure 33-6: Example Maximum IPD vs. VDD Brown-out Detect Enabled
(85°C to -40°C, RC Mode)
The shaded region represents the built-in hysteresis of the Brown-out Reset circuitry.
2.5 3.0 3.5 4.0 4.5 5.0 5.5
1400
1200
1000
800
600
400
200
0
VDD (Volts)
IPD (µA)
Device in
Brown-out
Device NOT in
Brown-out Reset
Reset
The shaded region represents the built-in hysteresis of the Brown-out Reset circuitry.
2.5 3.0 3.5 4.0 4.5 5.0 5.5
1400
1200
1000
800
600
400
200
0
VDD (Volts)
IPD (µA)
4.3
1600
Device NOT in
Brown-out Reset
Device in
Brown-out
Reset
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2000 Microchip Technology Inc. DS39534A-page 33-7
Section 33. Device Characteristics
Device
Characteristics
33
Figure 33-7: Example Typical IPD vs. Timer1 Enabled
(32 kHz, RC0/RC1 = 33 pF/33 pF, RC Mode)
Figure 33-8: Example Maximum IPD vs. Timer1 Enabled
(32 kHz, RC0/RC1 = 33 pF/33 pF, -40°C to 85°C, RC Mode)
30
25
20
15
10
5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (Volts)
IPD (µA)
30
25
20
15
10
5
0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (Volts)
IPD (µA)
35
40
45
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DS39534A-page 33-8 2000 Microchip Technology Inc.
33.3.2 IDD vs. Frequency
IDD is the current (I) that the device consumes when the device is in operating mode. This test is
taken with all I/O as inputs, either pulled high or low. That is, there are no floating inputs, nor are
any pins driving an output (with a load).
The IDD vs. Frequency charts measure the results on a Microchip automated bench setup, called
the DCS (Data Collection System). The DCS accurately reflects the device and specified component
values, that is, it does not add stray capacitance or current.
33.3.2.1 RC Measurements
For the RC measurement, the DCS selects a resistor and capacitor value and then, varies the
voltage over the specified range. As the voltage is changed, the frequency of operation changes.
For a fixed RC, as VDD increases, the frequency increases. After the measurement at this RC
has been taken, the RC value is changed and the measurements are taken again. Each point on
the graph corresponds to a device voltage, resistor value (R), and capacitor value (C).
Figure 33-9: Example Typical IDD vs. Frequency (RC Mode @ 22 pF, 25°C)
2000
1800
1600
1400
1200
800
1000
600
400
200
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Frequency (MHz)
IDD (µA)
Shaded area is
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
beyond recommended range. ‡ R=5kΩ
† R = 10 kΩ
‡
†
39500 18C Reference Manual.book Page 8 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39534A-page 33-9
Section 33. Device Characteristics
Device
Characteristics
33
Figure 33-10: Example Maximum IDD vs. Frequency (RC Mode @ 22 pF, -40°C to 85°C)
Figure 33-11: Example Typical IDD vs. Frequency (RC Mode @ 100 pF, 25°C)
2000
1800
1600
1400
1200
800
1000
600
400
200
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Frequency (MHz)
IDD (µA)
Shaded area is
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
beyond recommended range.
1600
1400
1200
1000
800
600
400
200
0
0 200 400 600 800 1000 1200 1400 1600 1800
Frequency (kHz)
IDD (µA)
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
Shaded area is
beyond recommended range.
39500 18C Reference Manual.book Page 9 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39534A-page 33-10 2000 Microchip Technology Inc.
Figure 33-12: Example Maximum IDD vs. Frequency (RC Mode @ 100 pF, -40°C to 85°C)
Figure 33-13: Example Typical IDD vs. Frequency (RC Mode @ 300 pF, 25°C)
1600
1400
1200
1000
800
600
400
200
0
0 200 400 600 800 1000 1200 1400 1600 1800
Frequency (kHz)
IDD (µA)
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
Shaded area is
beyond recommended range.
1200
1000
800
600
400
200
0
0 100 200 300 400 500 600 700
Frequency (kHz)
IDD (µA)
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
39500 18C Reference Manual.book Page 10 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39534A-page 33-11
Section 33. Device Characteristics
Device
Characteristics
33
Figure 33-14: Example Maximum IDD vs. Frequency (RC Mode @ 300 pF, -40°C to 85°C)
Figure 33-15:Example Typical IDD vs. Capacitance @ 500 kHz (RC Mode)
1200
1000
800
600
400
200
0
0 100 200 300 400 500 600 700
Frequency (kHz)
IDD (µA)
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
Capacitance (pF)
600
IDD (µA)
500
400
300
200
100
0
20 pF 100 pF 300 pF
5.0V
4.0V
3.0V
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PIC18C Reference Manual
DS39534A-page 33-12 2000 Microchip Technology Inc.
33.3.2.2 Crystal Oscillator Measurements
On the Data Collection System, there are several crystals. For this test, a crystal is multiplexed
into the device circuit and the crystal’s capacitance values can be varied. The capacitance and
voltage values are varied to determine the best characteristics (current, oscillator waveform and
oscillator start-up), and then the currents are measured over voltage. The next crystal oscillator
is then switched in and the procedure is repeated.
Figure 33-16: Example Typical IDD vs. Frequency (LP Mode, 25°C)
Figure 33-17: Example Maximum IDD vs. Frequency (LP Mode, -40°C to 85°C)
120
100
80
60
40
20
0
0 50 100 150 200
Frequency (kHz)
IDD (µA)
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
120
100
80
60
40
20
0
0 50 100 150 200
Frequency (kHz)
IDD (µA)
140
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
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2000 Microchip Technology Inc. DS39534A-page 33-13
Section 33. Device Characteristics
Device
Characteristics
33
Figure 33-18: Example Typical IDD vs. Frequency (XT Mode, 25°C)
Figure 33-19: Example Maximum IDD vs. Frequency (XT Mode, -40°C to 85°C)
1200
1000
800
600
400
200
0
0.0 0.4
Frequency (MHz)
IDD (µA) 1400
1600
1800
0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
1200
1000
800
600
400
200
0
0.0 0.4
Frequency (MHz)
IDD (µA)
1400
1600
1800
0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0
5.5V
5.0V
4.5V
4.0V
3.5V
3.0V
2.5V
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PIC18C Reference Manual
DS39534A-page 33-14 2000 Microchip Technology Inc.
Figure 33-20: Example Typical IDD vs. Frequency (HS Mode, 25°C)
Figure 33-21: Example Maximum IDD vs. Frequency (HS Mode, -40°C to 85°C)
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
1 2 4 6 8 10 12 14 16 18 20
Frequency (MHz)
IDD (mA)
5.5V
5.0V
4.5V
4.0V
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
1 2 4 6 8 10 12 14 16 18 20
Frequency (MHz)
IDD (mA)
5.5V
5.0V
4.5V
4.0V
39500 18C Reference Manual.book Page 14 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39534A-page 33-15
Section 33. Device Characteristics
Device
Characteristics
33
33.3.3 RC Oscillator Frequency
These tables show the effects of the RC oscillator frequency as the device voltage varies. In
these measurements, a capacitor and resistor value are selected and then, the frequency of the
RC is measured, as the device voltage varies. The table shows the typical frequency for a R and
C value at 5V, as well as the variation from this frequency that can be expected, due to device
processing.
Figure 33-22: Example Typical RC Oscillator Frequency vs. VDD
Figure 33-23: Example Typical RC Oscillator Frequency vs. VDD
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (Volts)
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Fosc (MHz)
CEXT = 22 pF, T = 25°C
R = 100k
R = 10k
R = 5k
Shaded area is beyond recommended range.
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (Volts)
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Fosc (MHz)
CEXT = 100 pF, T = 25°C
R = 100k
R = 10k
R = 5k
R = 3.3k
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PIC18C Reference Manual
DS39534A-page 33-16 2000 Microchip Technology Inc.
Figure 33-24: Example Typical RC Oscillator Frequency vs. VDD
Table 33-1: Example RC Oscillator Frequencies
CEXT REXT
Average
Fosc @ 5V, 25°C
22 pF 5k 4.12 MHz ± 1.4%
10k 2.35 MHz ± 1.4%
100k 268 kHz ± 1.1%
100 pF 3.3k 1.80 MHz ± 1.0%
5k 1.27 MHz ± 1.0%
10k 688 kHz ± 1.2%
100k 77.2 kHz ± 1.0%
300 pF 3.3k 707 kHz ± 1.4%
5k 501 kHz ± 1.2%
10k 269 kHz ± 1.6%
100k 28.3 kHz ± 1.1%
The percentage variation indicated here is part to part variation due to normal process distribution.
The variation indicated is ±3 standard deviation from average value for VDD = 5V.
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (Volts)
1000
900
800
700
600
500
400
300
200
100
0
Fosc (kHz)
CEXT = 300 pF, T = 25°C
R = 100k
R = 10k
R = 5k
R = 3.3k
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2000 Microchip Technology Inc. DS39534A-page 33-17
Section 33. Device Characteristics
Device
Characteristics
33
33.3.4 Oscillator Transconductance
Transconductance of the oscillator indicates the gain of the oscillator. As the transconductance
increases, the gain of the oscillator circuit increases, which causes the current consumption of
the oscillator circuit to increase. Also, as the transconductance increases, the maximum frequency
that the oscillator circuit can support also increases, or the start-up time of the oscillator
decreases.
Figure 33-25: Example Transconductance (gm) of HS Oscillator vs. VDD
Figure 33-26: Example Transconductance (gm) of LP Oscillator vs. VDD
4.0
3.0 3.5 4.0 4.5 5.0 5.5
gm (mA/V)
VDD (Volts)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Typ 25°C
Min 85°C
Max -40°C
110
100
90
80
70
60
50
40
30
20
10
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
gm (mA/V)
VDD (Volts)
Typ 25°C
Min 85°C
Max -40°C
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PIC18C Reference Manual
DS39534A-page 33-18 2000 Microchip Technology Inc.
Figure 33-27: Example Transconductance (gm) of XT Oscillator vs. VDD
1000
900
800
700
600
500
400
300
200
100
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
gm (mA/V)
VDD (Volts)
Typ 25°C
Min 85°C
Shaded area is beyond recommended range.
Max -40°C
39500 18C Reference Manual.book Page 18 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39534A-page 33-19
Section 33. Device Characteristics
Device
Characteristics
33
33.3.5 Crystal Start-up Time
These graphs show the start-up time that one should expect to see at the specified voltage level,
for a given crystal/capacitor combination.
Figure 33-28: Example Typical XTAL Start-up Time vs. VDD (LP Mode, 25°C)
Figure 33-29: Example Typical XTAL Start-up Time vs. VDD (HS Mode, 25°C)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
2.5 3.0 3.5 4.0 4.5 5.0 5.5
VDD (Volts)
Start-up Time (Seconds)
32 kHz, 33 pF/33 pF
200 kHz, 15 pF/15 pF
7
6
5
4
3
2
1
4.0 4.5 5.0 5.5
VDD (Volts)
Start-up Time (ms)
20 MHz, 33 pF/33 pF
8 MHz, 33 pF/33 pF
8 MHz, 15 pF/15 pF
20 MHz, 15 pF/15 pF
39500 18C Reference Manual.book Page 19 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39534A-page 33-20 2000 Microchip Technology Inc.
Figure 33-30: Example Typical XTAL Start-up Time vs. VDD (XT Mode, 25°C)
70
60
50
40
30
20
10
0
2.5 4.0 5.0 5.5 3.0 3.5 4.5
VDD (Volts)
Start-up Time (ms)
200 kHz, 68 pF/68 pF
200 kHz, 47 pF/47 pF
1 MHz, 15 pF/15 pF
4 MHz, 15 pF/15 pF
39500 18C Reference Manual.book Page 20 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39534A-page 33-21
Section 33. Device Characteristics
Device
Characteristics
33
Figure 33-31: Example VTH (Input Threshold Trip Point Voltage) of I/O Pins vs. VDD
Figure 33-32: Example VIH, VIL of MCLR, T0CKI and OSC1 (in RC Mode) vs. VDD
2.00
1.80
1.60
1.40
1.20
1.00
2.5 3.0 3.5 4.0 4.5 5.0
VDD (Volts)
0.80
0.60
5.5
Typ (+25°C)
VTH (Volts)
3.5
3.0
2.5
2.0
1.5
1.0
2.5 3.0 3.5 4.0 4.5 5.0
VDD (Volts)
0.5
0.0
5.5
VIH, VIL (Volts)
4.0
4.5
VIH min (–40°C to +85°C)
VIH max (–40°C to +85°C)
VIH typ +25°C
VIL min (–40°C to +85°C)
VIL max (–40°C to +85°C)
VIL typ +25°C
Note: These input pins have Schmitt Trigger input buffers.
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PIC18C Reference Manual
DS39534A-page 33-22 2000 Microchip Technology Inc.
Figure 33-33: Example VTH (Input Threshold Trip Point Voltage) of OSC1 Input (in XT, HS, and LP modes) vs.
VDD
Figure 33-34: Example WDT Timer Time-out Period vs. VDD
2.4
2.2
2.0
1.8
1.6
1.4
2.5 3.0 3.5 4.0 4.5 5.0
VDD (Volts)
1.2
1.0
5.5
Typ (+25°C)
VTH (Volts)
2.6
2.8
3.0
3.2
3.4
45
40
35
30
25
20
2.5 3.0 3.5 4.0 4.5 5.0
VDD (Volts)
15
10
5.5
50
2.0
WDT period (ms)
Typ +125°C
Typ +85°C
Typ +25°C
Typ –40°C
39500 18C Reference Manual.book Page 22 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39534A-page 33-23
Section 33. Device Characteristics
Device
Characteristics
33
Figure 33-35: Example IOH vs. VOH, VDD =3V
Figure 33-36: Example IOH vs. VOH, VDD =5V
0
–5
–10
–15
–20
–25
0 0.5 1.0 1.5 2.0 2.5
VOH (Volts)
IOH (mA)
Min +85°C
3.0
Typ +25°C
Max –40°C
0
–10
–20
–30
–40
1.5 2.0 2.5 3.0 3.5 4.0
VOH (Volts)
IOH (mA)
Typ –40°C
4.5 5.0
Typ +85°C
Typ +125°C
Typ +25°C
39500 18C Reference Manual.book Page 23 Monday, July 10, 2000 6:12 PM
PIC18C Reference Manual
DS39534A-page 33-24 2000 Microchip Technology Inc.
Figure 33-37: Example IOL vs. VOL, VDD =3V
Figure 33-38: Example IOL vs. VOL, VDD =5V
45
40
35
30
25
20
15
10
5
0
0.0 0.5 1.0 1.5 2.0 2.5
VOL (Volts)
IOL (mA)
Min +85°C
Max –40°C
Typ +25°C
3.0
90
80
70
60
50
40
30
20
10
0
0.0 0.5 1.0 1.5 2.0 2.5
VOL (Volts)
IOL (mA)
Min +85°C
Max –40°C
Typ +25°C
3.0
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2000 Microchip Technology Inc. DS39534A-page 33-25
Section 33. Device Characteristics
Device
Characteristics
33
33.3.6 Tested Crystals and Their Capacitor Values
This table shows the crystal frequency and manufacturer that was used for every test in this section,
as well as the capacitor values/ranges that exhibited the best characteristics.
Table 33-2: Example Capacitor Selection for Crystal Oscillators
33.3.7 Example EPROM Memory Erase Times
The UV erase time of an EPROM cell depends on the geometry size of the EPROM cell and the
manufacturing technology. Table 33-3 shows some of the expected erase times for each different
device.
Table 33-3: Example of Typical EPROM Erase Time Recommendations
Osc Type Crystal Frequency Capacitor Range
C1
Capacitor Range
C2
LP 32 kHz 33 pF 33 pF
200 kHz 15 pF 15 pF
XT 200 kHz 47-68 pF 47-68 pF
1 MHz 15 pF 15 pF
4 MHz 15 pF 15 pF
HS 4 MHz 15 pF 15 pF
8 MHz 15-33 pF 15-33 pF
20 MHz 15-33 pF 15-33 pF
Note: Higher capacitance increases the stability of the oscillator but also increases the start-up time.
These values are for design guidance only. Rs may be required in HS mode, as well as XT
mode, to avoid overdriving crystals with low drive level specification. Since each crystal has
its own characteristics, the user should consult the crystal manufacturer for appropriate values
of external components or verify oscillator performance.
Crystals Used:
32 kHz Epson C-001R32.768K-A ± 20 PPM
200 kHz STD XTL 200.000KHz ± 20 PPM
1 MHz ECS ECS-10-13-1 ± 50 PPM
4 MHz ECS ECS-40-20-1 ± 50 PPM
8 MHz EPSON CA-301 8.000M-C ± 30 PPM
20 MHz EPSON CA-301 20.000M-C ± 30 PPM
Example
Device
Wavelength
(Angstroms)
Intensity
(µW/cm2)
Distance from UV
Lamp (inches)
Typical Time (1)
(minutes)
1 2537 12,000 1 60
Note 1: If these criteria are not met, the erase times will be different.
2: Refer to the device data sheet for the typical erase times for a device.
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PIC18C Reference Manual
DS39534A-page 33-26 2000 Microchip Technology Inc.
33.4 Revision History
Revision A
This is the initial released revision of the Device Characteristics description.
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2000 Microchip Technology Inc. DS39535A-page 34-1
Development
Tools
34
Section 34. Development Tools
HIGHLIGHTS
This section of the manual contains the following major topics:
34.1 Introduction .................................................................................................................. 34-2
34.2 The Integrated Development Environment (IDE) ......................................................... 34-3
34.3 MPLAB® Software Language Support ........................................................................ 34-6
34.4 MPLAB-SIM Simulator Software.................................................................................. 34-8
34.5 MPLAB® Emulator Hardware Support ........................................................................ 34-9
34.8 MPLAB Programmer Support .................................................................................... 34-10
34.9 Supplemental Tools.................................................................................................... 34-11
34.10 Development Boards.................................................................................................. 34-12
34.11 Development Tools for Other Microchip Products ...................................................... 34-14
34.12 Related Application Notes.......................................................................................... 34-15
34.13 Revision History ......................................................................................................... 34-16
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PIC18C Reference Manual
DS39535A-page 34-2 2000 Microchip Technology Inc.
34.1 Introduction
Microchip offers a wide range of integrated development tools to ease the application development
process. These tools can be broken down into the core development tools and the supplemental
tools.
The core tools are as follows:
• MPLAB Integrated Development Environment, including full featured editor
• Language Products
- MPASM Assembler
- MPLAB-CXX C Compiler
-MPLAB-C17
-MPLAB-C18
- MPLINK/MPLIB Linker Librarian
• MPLAB-SIM Software Simulator
• Real-Time In-Circuit Emulators
- MPLAB-ICE Real-Time Emulator In-Circuit
- ICEPIC Low-Cost Emulator with Breakpoint debug capabilities
• In-Circuit Debugger
- MPLAB-ICD for 16F877
• Device Programmers
- PRO MATE II Universal Programmer
- PICSTART Plus Entry-Level Development Programmer
• Development Boards
- PICDEM-1 Low-Cost Demonstration Board
- PICDEM-2 Low-Cost Demonstration Board
- PICDEM-3 Low-Cost Demonstration Board
- PICDEM-17 Low-Cost Demonstration Board
- PICDEM-14A Low-Cost Demonstration Board
The minimum configuration of MPLAB is the Integrated Development Environment (IDE), the
assembler (MPASM), and the software simulator (MPLAB-SIM). Other tools are added to MPLAB
as they are installed. This gives a common platform for the design activity, from the writing and
assembling of the source code, through the simulation/emulation, to the programming of prototype
devices.
In addition to Microchip, there are many third party vendors. Microchip’s Third Party Handbook
gives an overview of the manufactures and their tools.
Note: The most current version may be downloaded from Microchip’s web site for free.
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2000 Microchip Technology Inc. DS39535A-page 34-3
Section 34. Development Tools
Development
Tools
34
34.2 The Integrated Development Environment (IDE)
The core set of development tools operate under the IDE umbrella. The IDE is called MPLAB.
This gives a consistent look and feel to all the development tools so that minimal learning of the
new tool interface is required. The MPLAB IDE integrates all the following aspects of development:
• Source code editing
• Project management
• Machine code generation (from assembly or “C”)
• Device simulation
• Device emulation
• Device programming
MPLAB is a PC based Windows® application. It has been extensively tested using Windows 95
and recommended in either of these operating environments:
• Windows 2000
• Windows NT 4.0
• Windows 98
• Windows 95
• Windows 3.X
This comprehensive tool suite allows the complete development of a project without leaving the
MPLAB environment.
Windows is a registered trademark of Microsoft Corporation.
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PIC18C Reference Manual
DS39535A-page 34-4 2000 Microchip Technology Inc.
34.2.1 MPLAB
The MPLAB IDE Software brings an ease of software development previously unseen in the 8-bit
microcontroller market. MPLAB is a Windows based application that contains:
• A full featured editor
• Four operating modes
- editor
- simulator
- emulator
- programmer
• A project manager
• Customizable tool bar and key mapping
• A status bar with project information
• Extensive on-line help
MPLAB allows you to:
• Edit your source files. This includes:
- MPASM assembly language
- MPLAB-CXX ‘C’ language
• One touch assemble (or compile) and download to PIC16/17 tools
(automatically updates all project information)
• Debug using:
- source files
- absolute listing file
- program memory
• Run up to four MPLAB-ICE emulators on the same PC
• Run or Single-step
- program memory
- source file
- absolute listing
Microchip’s simulator, MPLAB-SIM, operates under the same platform as the MPLAB-ICE emulator.
This allows the user to learn a single tool set which functions equivalently for both the simulator
and the full featured emulator.
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2000 Microchip Technology Inc. DS39535A-page 34-5
Section 34. Development Tools
Development
Tools
34
Figure 34-1 shows a typical MPLAB desktop with an open project. Some of the highlights are:
• Tool bars, multiple choices and user configurable
• Status, mode information, and button help on footer bar
• Multiple windows, such as
- Source code
- Source listing (most useful for ‘C’ programs)
- Register file window (RAM)
- Watch windows (to look at specific register)
- Stop watch window for time/cycle calculations
• Programmer support (in this case PRO MATE pull down menu)
Figure 34-1: MPLAB Project Window
Note: This screen shot may not look exactly like the currently released MPLAB version.
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DS39535A-page 34-6 2000 Microchip Technology Inc.
34.3 MPLAB® Software Language Support
To make the PICmicro device operate as desired in the application, a software program needs
to be written for the microcontroller. This software program needs to be written in one of the programming
languages for the device. Currently MPLAB supports two of Microchip’s language
products:
• Microchip Assembler (MPASM)
• Microchip ‘C’ Compiler (MPLAB-CXX)
• Other language products that support Common Object Description (COD) may also work
with MPLAB
34.3.1 Assembler (MPASM)
The MPASM Universal Macro Assembler is a PC-hosted symbolic assembler. It supports all
Microchip microcontroller families.
MPASM offers full featured Macro capabilities, conditional assembly, and several source and listing
formats. It generates various object code formats to support Microchip's development tools
as well as third party programmers.
MPASM allow full symbolic debugging from the Microchip Universal Emulator System
(MPLAB-ICE).
MPASM has the following features to assist in developing software for specific use applications.
• Provides translation of Assembler source code to object code for all Microchip microcontrollers.
• Macro assembly capability.
• Produces all the files (Object, Listing, Symbol, and Special) required for symbolic debug
with Microchip’s emulator systems.
• Supports Hex (default), Decimal and Octal source and listing formats.
MPASM provides a rich directive language to support programming of the PICmicro. Directives
are helpful in making the development of your assemble source code shorter and more maintainable.
34.3.2 C Compilers
The MPLAB-CXX is a complete ‘C’ compiler for Microchip’s PICmicro family of microcontrollers.
The compiler provides powerful integration capabilities and ease of use not found with other
compilers.
For easier source level debugging, the compiler provides symbol information that is compatible
with the MPLAB IDE memory display, Watch windows, and File register windows.
34.3.2.1 MPLAB-C17 C Compiler
The MPLAB-C17 Code Development System is a complete ANSI ‘C’ compiler and integrated
development environment for Microchip’s PIC17CXXX family of microcontrollers. This compiler
provides powerful integration capabilities and ease of use not found with other compilers.
For easier source level debugging, the compiler provides symbol information that is compatible
with the MPLAB IDE memory display.
34.3.2.2 MPLAB-C18 C Compiler
The MPLAB-C18 Code Development System is a complete ANSI ‘C’ compiler and integrated
development environment for Microchip’s PIC18CXXX family of microcontrollers. This compiler
provides powerful integration capabilities and ease of use not found with other compilers.
For easier source level debugging, the compiler provides symbol information that is compatible
with the MPLAB IDE memory display.
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34.3.3 MPLINK Linker
MPLINK is a linker for the Microchip C compiler, MPLAB-CXX, and the Microchip relocatable
assembler, MPASM. MPLINK is a relocatable linker for MPASM and MPLAB-C17 and
MPLAB-C18. It can link relocatable objects from assembly or C source files along with precompiled
libraries using directives from a linker script.
MPLINK allows you to produce modular, re-usable code with MPLAB-CXX and MPASM. Control
over the linking process is accomplished through a linker “script” file and with command line
options. MPLINK ensures that all symbolic references are resolved and that code and data fit into
the available PICmicro device.
MPLINK combines multiple input object modules generated by MPLAB-CXX or MPASM, into a
single executable file. The actual addresses of data and the location of functions will be assigned
when MPLINK is executed. This means that you will instruct MPLINK to place code and data
somewhere within the named regions of memory, not to specific physical locations.
Once the linker knows about the ROM and RAM memory regions available in the target PICmicro
device and it analyzes all the input files, it will try to fit the application’s routines into ROM and
assign it’s data variables into available RAM. If there is too much code or too many variables to
fit, MPLINK will give an error message.
MPLINK also provides flexibility for specifying that certain blocks of data memory are re-usable,
so that different routines (which never call each other and don’t depend on this data to be
retained between execution) can share limited RAM space.
MPLINK features include:
• MPLINK works with MPASM and MPLAB-C17 and MPLAB-C18.
• MPLINK allows all memory areas to be defined as sections to provide link-time flexibility.
34.3.4 MPLIB Librarian
MPLIB is a librarian for use with COFF object modules, created using either MPASM,
MPASMWIN, or MPLAB-CXX or later. MPLIB is a librarian for pre-compiled code to be used with
MPLINK. When a routine from a library is called from another source file, only the modules that
contain that routine will be linked in with the application. This allows large libraries to be used
efficiently in many different applications.
MPLIB manages the creation and modification of library files. A library file is a collection of object
modules that are stored in a single file. There are several reasons for creating library files:
• Libraries make linking easier. Since library files can contain many object files, the name of
a library file can be used instead of the names of many separate object files when linking.
• Libraries help keep code small. Since a linker only uses the required object files contained
in a library, not all object files which are contained in the library necessarily wind up in the
linker’s output module.
• Libraries make projects more maintainable. If a library is included in a project, the addition
or removal of calls to that library will not require a change to the link process.
• Libraries help convey the purpose of a group of object modules. Since libraries can group
together several related object modules, the purpose of a library file is usually more understandable
that the purpose of its individual object modules. For example, the purpose of a
file named “math.lib” is more apparent that the purpose of 'power.o', 'ceiling.o', and 'floor.o'.
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34.4 MPLAB-SIM Simulator Software
The software simulator is a no-cost tool with which to evaluate Microchip’s products and designs.
The use of the simulator greatly helps debug software, particularly algorithms. Depending on the
complexity of a design project, a time/cost benefit should be looked at comparing the simulator
with an emulator.
For projects that have multiple engineers in the development, the simulator in conjunction with
an emulator, can keep costs down and will allow speedy debug of the tough problems.
MPLAB-SIM Simulator simulates the PICmicro series microcontrollers on an instruction level. On
any given instruction, the user may examine or modify any of the data areas or provide external
stimulus to any of the pins. The input/output radix can be set by the user and the execution can
be performed in; single step, execute until break, or in a trace mode.
MPLAB-SIM supports symbolic debugging using MPLAB-CXX, and MPASM. The Software Simulator
offers the low cost flexibility to develop and debug code outside of the laboratory environment
making it an excellent multi-project software development tool.
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34.5 MPLAB® Emulator Hardware Support
Microchip offers two emulators, a high-end version (MPLAB-ICE) and a low-cost version
(ICEPIC). Both versions offer a very good price/feature value, and the selection of which emulator
should depend on the feature set that you wish. For people looking at doing several projects
with Microchip devices (or using the high-end devices), the use of MPLAB-ICE may offset the
additional investment, through time savings achieved with the sophisticated breakpoint and trace
capabilities.
34.6 MPLAB® High Performance Universal In-Circuit Emulator with MPLAB IDE
The MPLAB-ICE Universal In-Circuit Emulator is intended to provide the product development
engineer with a complete microcontroller design tool set for PICmicro microcontrollers (MCUs).
Software control of MPLAB-ICE is provided by the MPLAB Integrated Development Environment
(IDE), which allows editing, “make” and download, and source debugging from a single environment.
Interchangeable target probes allow the system to be easily re-configured for emulation of different
processors. The universal architecture of the MPLAB-ICE allows expansion to support all
new Microchip microcontrollers.
The MPLAB-ICE Emulator System has been designed as a real-time emulation system with
advanced features that are generally found on more expensive development tools.
A CE compliant version of MPLAB-ICE is available for European Union (EU) countries.
34.6.1 ICEPIC: Low-Cost PIC16CXXX In-Circuit Emulator
ICEPIC is a low-cost in-circuit emulator solution for the Microchip Base-line and Mid-Range families
of 8-bit OTP microcontrollers.
ICEPIC features real-time emulation. ICEPIC is available under the MPLAB environment.
ICEPIC is designed by Neosoft Inc. and is manufactured under license by RF Solutions. Other
emulator solutions may be available directly from RF solutions.
34.7 MPLAB-ICD In-Circuit Debugger
Microchip’s In-Circuit Debugger, MPLAB-ICD, is a powerful, low-cost run-time development tool.
This tool is based on the FLASH PIC16F877 and can be used to develop for this and other PICmicro
microcontrollers from the PIC16CXXX family (see TB033 for more information).
MPLAB-ICD utilizes the In-Circuit Debugging capability built into the PIC16F87X. This feature,
along with Microchip’s In-Circuit Serial Programming protocol, offers cost-effective in-circuit
FLASH programming and debugging from the graphical user interface of the MPLAB Integrated
Development Environment. This enables a designer to develop and debug source code by
watching variables, single-stepping and setting break points. Running at full speed enables testing
hardware in real-time. The MPLAB-ICD is also a programmer for the flash PIC16F87X family.
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34.8 MPLAB Programmer Support
Microchip offers two levels of device programmer support. For most bench setups the PICSTART
Plus is sufficient. When true system qualification is done, the PRO MATE II should be the minimum
used, due to the validation of program memory at VDD min and VDD max for maximum reliability
34.8.1 PRO MATE® II: Universal Device Programmer
The PRO MATE II Universal Programmer is a full-featured programmer capable of operating in
stand-alone mode as well as PC-hosted mode. PRO MATE II operates under MPLAB or as a
DOS command driven program.
The PRO MATE II has programmable VDD and VPP supplies which allows it to verify programmed
memory at VDD min and VDD max for maximum reliability. It has an LCD display for error messages,
keys to enter commands and a modular detachable socket assembly to support various
package types. In stand-alone mode, the PRO MATE II can read, verify, or program Base-Line,
Mid-Range, and High-End devices. It can also set configuration and code-protect bits in this
mode. The PRO MATE II programmer also supports Microchip’s Serial EEPROM and KEELOQ®
Security devices.
A separate In-Circuit Serial Programming (ICSP) module is available for volume programming in
a manufacturing environment. See the Programming module documentation for specific application
requirements.
34.8.2 PICSTART® Plus Low-Cost Development Kit
The PICSTART Plus programmer is an easy-to-use, low-cost development programmer. It connects
to the PC via one of the COM (RS-232) ports. MPLAB Integrated Development Environment
software makes using the programmer simple and efficient. PICSTART Plus is not
recommended for production programming, since it does not perform memory verification at
VDDMIN and VDDMAX.
PICSTART Plus supports all Base-Line, Mid-Range, and High-End devices. For devices with up
to more than 40 pins, an adapter socket is required. DIP packages are the form factor that are
directly supported. Other package types may be supported with adapter sockets.
Note: The use of a PICSTART Plus Programmer is not recommended for ICSP. If ICSP is
required, the use of the PRO MATE II Universal Programmer with the associated
socket module is the recommended Microchip solution.
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34.9 Supplemental Tools
Microchip endeavors to provide a broad range of solutions to our customers. These tools are
considered supplemental tools and may be available directly from Microchip or from another vendor.
A comprehensive listing of alternate tool providers is contained in the Third Party Guide.
34.9.1 Third Party Guide
Looking for something else? Microchip strongly encourages and supports it’s Third Parties.
Microchip publishes the “Third Party Guide”. It is an extensive volume that provides:
• Company
• Product
• Contact Information
• Consultants
For over 100 companies and 200 products. These products include Emulators, Device Programmers,
Gang Programmers, Language Products, and other tool solutions.
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34.10 Development Boards
Development boards give a quick start on a circuit that demonstrates the capabilities of a particular
device. The device program can then be modified for your own evaluation of the device functionality
and operation.
34.10.1 PICDEM-1 Low-Cost PIC16/17 Demonstration Board
The PICDEM-1 is a simple board which demonstrates the capabilities of several of Microchip’s
microcontrollers. The microcontrollers supported are:
• PIC16C5X (PIC16C54 to PIC16C58A)
• PIC16C61
• PIC16C62X
• PIC16C71
• PIC16C710
• PIC16C711
• PIC16C8X
• PIC17C42A
• PIC17C43
• PIC17C44
All necessary hardware and software is included to run basic demo programs. The users can program
the sample microcontrollers provided with the PICDEM-1 board, on a PRO MATE II or
PICSTART Plus programmer, and easily test firmware. The user can also connect the
PICDEM-1 board to the MPLAB-ICE emulator and download the firmware to the emulator for
testing. Additional prototype area is available to build additional hardware. Some of the features
include an RS-232 interface, a potentiometer for simulated analog input, push-button switches
and eight LEDs connected to PORTB.
34.10.2 PICDEM-2 Low-Cost PIC16CXXX Demonstration Board
The PICDEM-2 is a simple demonstration board that supports the following microcontrollers:
• PIC16C62
• PIC16C63
• PIC16C64
• PIC16C65
• PIC16C66
• PIC16C67
• PIC16C72
• PIC16C73
• PIC16C74
• PIC16C76
• PIC16C77
All the necessary hardware and software is included to run the basic demonstration programs.
The user can program the sample microcontrollers provided with the PICDEM-2
board, on a PRO MATE II programmer or PICSTART Plus, and easily test firmware. The
MPLAB-ICE emulator may also be used with the PICDEM-2 board to test firmware. Additional
prototype area has been provided for additional hardware. Some of the features include a
RS-232 interface, push-button switches, a potentiometer for simulated analog input, a Serial
EEPROM to demonstrate usage of the I2C bus and separate headers for connection to an LCD
module and a keypad.
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34.10.3 PICDEM-3 Low-Cost PIC16CXXX Demonstration Board
The PICDEM-3 is a simple demonstration board that supports the PIC16C923 and PIC16C924
in the PLCC package. It will also support future 44-pin PLCC microcontrollers that have an
LCD Module. All the necessary hardware and software is included to run the basic demonstration
programs. The user can program the sample microcontrollers, provided with
the PICDEM-3 board, on a PRO MATE II programmer or PICSTART Plus with an adapter
socket, and easily test firmware. The MPLAB-ICE emulator may also be used with the PICDEM-3
board to test firmware. Additional prototype area has been provided for adding hardware. Some
of the features include an RS-232 interface, push-button switches, a potentiometer for simulated
analog input, a thermistor and separate headers for connection to an external LCD module and
a keypad. Also provided on the PICDEM-3 board is an LCD panel, with 4 commons and 12 segments,
that is capable of displaying time, temperature and day of the week. The PICDEM-3 provides
an additional RS-232 interface and Windows 3.1 software for showing the de-multiplexed
LCD signals on a PC. A simple serial interface allows the user to construct a hardware
de-multiplexer for the LCD signals.
34.10.4 PICDEM-14A Low-Cost PIC14C000 Demonstration Board
The PICDEM-14A demo board is a general purpose platform which is provided to help evaluate
the PIC14C000 mixed signal microcontroller. The board runs a PIC14C000 measuring the voltage
of a potentiometer and the on-chip temperature sensor. The voltages are then calibrated to
the internal bandgap voltage reference. The voltage and temperature data are then transmitted
to the RS-232 port. This data can be displayed using a terminal emulation program, such as Windows
Terminal. This demo board also includes peripherals that allow users to display data on an
LCD panel, read from and write to a serial EEPROM, and prototype custom circuitry to interface
to the microcontroller.
34.10.5 PICDEM-17
The PICDEM-17 is an evaluation board that demonstrates the capabilities of several Microchip
microcontrollers, including PIC17C752, PIC17C756, PIC17C762, and PIC17C766. All necessary
hardware is included to run basic demo programs, which are supplied on a 3.5-inch disk. A
programmed sample is included, and the user may erase it and program it with the other sample
programs using the PRO MATE II or PICSTART Plus device programmers and easily debug and
test sample code. In addition, PICDEM-17 supports down-loading of programs to and executing
out of external FLASH memory on board. The PICDEM-17 is also usable with the MPLAB-ICE
emulator, and all of the sample programs can be run and modified using that emulator. Additionally,
a generous prototype area is available for user hardware.
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34.11 Development Tools for Other Microchip Products
34.11.1 SEEVAL Evaluation and Programming System
The SEEVAL Serial EEPROM Designer’s Kit supports all Microchip 2-wire and 3-wire Serial
EEPROMs. The kit includes everything necessary to read, write, erase or program special features
of any Microchip SEEPROM product including Smart SerialsTM and secure serials. The
Total EnduranceTM Disk is included to aid in trade-off analysis and reliability calculations. The
total endurance kit can significantly reduce time-to-market and results in a more optimized
system.
34.11.2 KEELOQ Evaluation and Programming Tools
KEELOQ evaluation and programming tools supports Microchip’s HCS Secure Data Products.
The HCS evaluation kit includes an LCD display to show changing codes, a decoder to decode
transmissions, and a programming interface to program test transmitters.
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34.12 Related Application Notes
This section lists application notes that are related to this section of the manual. These application
notes may not be written specifically for the Enhanced MCU family (that is they may be written
for the Base-Line, Mid-Range, or the High-End), but the concepts are pertinent, and could be
used (with modification and possible limitations). The current application notes related to Microchip’s
development tools are:
Title Application Note #
No related application notes at this time.
Note: Several of the tools have tutorials which may be helpful in learning the tools. Please
refer to the specific tool’s documentation for tutorial availability.
Note: Please visit the Microchip Web site for additional software code examples. These
code examples are stand alone examples to assist in the understanding of the
PIC18CXXX. The web address for these examples is:
http://www.microchip.com/10/faqs/codeex/
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34.13 Revision History
Revision A
This is the initial released revision of Microchip’s development tools description.
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Code
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Section 35. Code Development
HIGHLIGHTS
This section of the manual contains the following major topics:
35.1 Overview ...................................................................................................................... 35-2
35.2 Good Practice .............................................................................................................. 35-3
35.3 Diagnostic Code Techniques ....................................................................................... 35-5
35.4 Example Scenario and Implementation ....................................................................... 35-6
35.5 Implications of Using a High Level Language (HLL) .................................................... 35-7
35.6 Revision History ........................................................................................................... 35-8
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35.1 Overview
This section covers some good programming practice as well as some diagnostic techniques that
can be used in both the development stage, and the production release to help diagnose unexpected
operation in the field. The advantage of including diagnostic code is that the device continually
displays its status and the operational flow of the program.
These suggestions only scratch the surface of the possible techniques and good programming
practices. Future revisions of this section will add additional suggestions on good programming
practice and diagnostic techniques.
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35.2 Good Practice
The following are some recommended programming practices. These will help ensure consistent
program operation based on the stimulus supplied to the application software.
35.2.1 Use of Symbolic Code
Microchip supplies header files which use the register and bit name symbols specified in the
device data sheets. The use of these symbols aids in several facets of software development.
First, symbolic code makes the source file easier to read since the names relate to a function (as
opposed to register addresses and bit positions). Example 35-1 shows two implementations. The
first, though technically correct, is more difficult to follow then the second implementation. Also,
the second allows for easier migration between devices (and PICmicro families) since any
remapping of bit positions and register locations can automatically be handled by the software
tool.
Example 35-1:Hard Coding vs. Symbolic Code
35.2.2 Initialization of Data Memory
All Data Memory locations (SFRs and GPRs) should be initialized after a RESET. This will ensure
that they are at a known state when the application code accesses each location, and ensures
consistent operation
When all data memory is not initialized, there is a possibility that the application software will read
a location that is an indeterminate value. This may cause unexpected results from the application
software. This issue is sometimes highlighted when development moves from a windowed
device (where the window was not covered) to an OTP package.
BCF 0xD8, 0, 0 ; Clear the carry bit
: ;
BCF STATUS, C ; Clear the carry bit
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35.2.3 Trap for Unexpected Conditions
Sometimes the application software will test only for the expected conditions. This is typically
seen in the Interrupt Service Routine where only the expected sources for an interrupt are tested
for. Example 35-2 shows a typical way that the conditions are tested, while Example 35-3 shows
a more robust version. The TrapRoutine may do more then just loop waiting for a RESET. It
could output a code on an I/O pin to indicate that this unexpected condition occurred.
Example 35-2:Typical ISR Code
Example 35-3:Recommended ISR Code (with Trap)
35.2.4 Filling Unused Locations
In most application programs, not all program memory locations are used. These unprogrammed
locations (0xFFFF) execute as a NOP instruction. Since program execution is never intended to
go to one of these locations, the program should trap any occurrence of this. A good way to handle
this is to “fill” all unprogrammed locations with a branch which goes to its own program memory
location. With this, the WDT must be enabled to cause a device RESET and restart program
execution.
The Microchip Assembler supplies a directive to do this. This directive is the “fill” directive.
ORG ISRVectorAddress ; Address for Interrupt Service
; Routine
ISRH BTFSS PIR1, ADIF ; A/D Interrupt?
GOTO ADRoutine ; Yes, do A/D stuff
BTFSS PIR1, RCIF ; AUSART Receive Interrupt?
GOTO ReceiveRoutine ; Yes, do Receive stuff
CCPRoutine ; Since not other interrupt sources
: ; must be CCP interrupt
ORG ISRVectorAddress ; Address for Interrupt Service
; Routine
ISRH BTFSS PIR1, ADIF ; A/D Interrupt?
GOTO ADRoutine ; Yes, do A/D stuff
BTFSS PIR1, RCIF ; AUSART Receive Interrupt?
GOTO ReceiveRoutine ; Yes, do Receive stuff
BTFSS PIR1, CCPIF ; CCP Interrupt?
GOTO CCPRoutine ; Yes, do CCP stuff
TrapRoutine ; Should NEVER get here
GOTO TrapRoutine ; If we do, loop forever and
; wait for WDT reset
Note: Remember that the CLRWDT instruction should have a minimum number of occurrences
in the program and that the maximum time between the CLRWDT instructions
must NOT be greater than the minimum WDT time-out period, multiplied by the
selected prescaler.
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35.3 Diagnostic Code Techniques
This section describes diagnostic code that can be embedded into the application code to help
track the operation of the application software. Typically some mechanism is required to make
the information available to the external world. This can be from a serial port (such as the Addressable
USART module) or from extra I/O pins not used by the application.
35.3.1 Function Sequence
Have the diagnostic code output a unique code (value) for each function that the program enters.
This allows the flow of the program to be monitored from outside the device (with a logic analyzer)
and assist in determining if there is some unexpected condition that is causing code to execute
in the observed sequence.
35.3.2 Stack Depth
A counter can be implemented that is incremented in each function that is called and each time
that the program counter is at an interrupt vector address. The counter is then decremented at
the end of the function or interrupt service routine. The value of the stack can then be output to
indicate if the stack depth is out of its normal range (minimum and maximum).
35.3.3 A/D Operation
Visibility into the operation of the A/D can help validate the operation. Monitoring if the acquisition
time is the expected time delay, as well as the result generated by the module. Achieving the A/D
result accuracy depends on may factors, some internal and many external. The major internal
factor is that there is a sufficient amount of time once the input channel is selected, until the conversion
is started. This is called the acquisition time (TACQ).
35.3.3.1 A/D Acquisition Time
Use an I/O pin to indicate when the acquisition of the channel starts (toggle high) until the conversion
is started (toggle high). If the input channel is changed force the I/O to toggle high. The
last two I/O toggles before the A/D result is available, is acquisition time that the A/D had for that
selected channel.
35.3.3.2 A/D Result
Output the result so that you can determine if the program execution flow can be attributed to the
result from the A/D converter.
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35.4 Example Scenario and Implementation
In this example application, one I/O port is not implemented. This means that there are eight I/O
pins available to indicate the operational status of the PICmicro device and the flow of the application
software. Let’s say that the code implements 57 functions, the A/D is used and Addressable
USART are used.
Six bits (Code5:Code0) are required to uniquely specify the 57 functions. After each function gets
a code, an additional 7 codes are available. Table 35-1 shows how these codes could be defined,
while Table 35-2 shows how the diagnostic output port could be defined.
Table 35-1: Definitions of Additional Codes
Table 35-2: PORT Function assignment
So, as the device exits RESET, the PORT = ‘1111 11xx’ where the xx indicates the source of the
device RESET. Then the code for the main function is output on Rx7:Rx2 and Rx1:Rx0 = ‘00’. As
each function gets called, the stack depth is output. This requires that the code Rx7:Rx2 = ‘1111
11’ is output, then the stack depth counter is moved to the PORT. The code for the entered function
is then output.
After the A/D is enabled and acquisition of the selected channel begins, the Rx1 pin is toggled
high. Each event that causes the input to start a new acquisition time should cause the Rx1 pin
to toggle. These events include:
• Selection of a new input channel
• The completion of an A/D conversion
• Disabling and then re-enabling the A/D module
When an A/D conversion completes or the addressable USART receives a byte, the appropriate
code is output on the PORT and then the value is output.
6-bit Code Definition
1111 11 Next Byte out is stack depth
1111 10 Next Byte out is A/D Result High Byte
1111 01 Next Byte out is Addressable USART received byte
1111 00 Next Byte out is A/D Result Low Byte
0000 00 Device has exited a device RESET. Rx1:Rx0 can be used to indicate the
source of the RESET.
Pin Normal Mode
Mode after
“Additional Codes”
displayed
RESET
Rx7 Code5
Byte value for the
indicated function
0
Rx6 Code4 0
Rx5 Code3 0
Rx4 Code2 0
Rx3 Code1 0
Rx2 Code0 0
Rx1 Toggle for Start
of acquisition
4 codes
available to
indicate source
of RESET
Rx0 Toggle for Stop
of acquisition
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35.5 Implications of Using a High Level Language (HLL)
The use of a High Level Language, such as a C compiler, speeds the development cycle but can
increase the difficulty in the use of diagnostic code. When writing at the high level, functions may
be defined, but how the C compilers will implement those functions is hidden from the user. If the
function is used only once, the C complier may put that code in-line or use a GOTO to branch to
the function and a GOTO to return from the function. In both these implementations, the stack is
not affected. Also, if the function is called many times, but is small, it may be put inline. This again
will not affect the stack used. These techniques used by the compiler may lead to efficient code
generation, but may add to the difficulty in adding diagnostic code.
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35.6 Revision History
Revision A
This is the initial released revision for the Code Development with a PICmicro device description.
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Appendix
36
Section 36. Appendix
APPENDIX A: I2C OVERVIEW
This appendix provides an overview of the Inter-Integrated Circuit (I2C™) bus, with Subsection
A.2 “Addressing I2C Devices” discussing the operation of the SSP modules in I2C mode.
The I2C bus is a two-wire serial interface. The original specification, or standard mode, is for data
transfers of up to 100 Kbps. An enhanced specification, or fast mode (400 Kbps) is supported.
Standard and Fast mode devices will operate when attached to the same bus, if the bus operates
at the speed of the slower device.
The I2C interface employs a comprehensive protocol to ensure reliable transmission and reception
of data. When transmitting data, one device is the “master” which initiates transfer on the bus
and generates the clock signals to permit that transfer, while the other device(s) acts as the
“slave.” All portions of the slave protocol are implemented in the SSP module’s hardware, except
general call support, while portions of the master protocol need to be addressed in the
PIC16CXX software. The MSSP module supports the full implementation of the I2
C master protocol,
the general call address, and data transfers up to 1 Mbps. The 1 Mbps data transfers are
supported by some of Microchips Serial EEPROMs. Table A-1 defines some of the I2C bus terminology.
In the I2C interface protocol each device has an address. When a master wishes to initiate a data
transfer, it first transmits the address of the device that it wishes to “talk” to. All devices “listen” to
see if this is their address. Within this address, a bit specifies if the master wishes to
read-from/write-to the slave device. The master and slave are always in opposite modes (transmitter/receiver)
of operation during a data transfer. That is, they can be thought of as operating
in either of these two relations:
• Master-transmitter and Slave-receiver
• Slave-transmitter and Master-receiver
In both cases the master generates the clock signal.
The output stages of the clock (SCL) and data (SDA) lines must have an open-drain or open-collector
in order to perform the wired-AND function of the bus. External pull-up resistors are used
to ensure a high level when no device is pulling the line down. The number of devices that may
be attached to the I2C bus is limited only by the maximum bus loading specification of 400 pF
and addressing capability.
I
2C is a trademark of Philips Corporation.
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A.1 Initiating and Terminating Data Transfer
During times of no data transfer (idle time), both the clock line (SCL) and the data line (SDA) are
pulled high through the external pull-up resistors. The START and STOP conditions determine
the start and stop of data transmission. The START condition is defined as a high to low transition
of the SDA when the SCL is high. The STOP condition is defined as a low to high transition of
the SDA when the SCL is high. Figure A-1 shows the START and STOP conditions. The master
generates these conditions for starting and terminating data transfer. Due to the definition of the
START and STOP conditions, when data is being transmitted, the SDA line can only change state
when the SCL line is low.
Figure A-1: Start and Stop Conditions
SDA
SCL S P
START
Condition
Change
of Data
Allowed
Change
of Data
Allowed
STOP
Condition
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Section 36. Appendix
Appendix
36
Table A-1: I2
C Bus Terminology
Term Description
Transmitter The device that sends the data to the bus.
Receiver The device that receives the data from the bus.
Master The device which initiates the transfer, generates the clock and terminates
the transfer.
Slave The device addressed by a master.
Multi-master More than one master device in a system. These masters can attempt to
control the bus at the same time without corrupting the message.
Arbitration Procedure that ensures that only one of the master devices will control the
bus. This ensure that the transfer data does not get corrupted.
Synchronization Procedure where the clock signals of two or more devices are synchronized.
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A.2 Addressing I2C Devices
There are two address formats. The simplest is the 7-bit address format with a R/W bit
(Figure A-2). The more complex is the 10-bit address with a R/W bit (Figure A-3). For 10-bit
address format, two bytes must be transmitted. The first five bits specify this to be a 10-bit
address format. The 1st transmitted byte has 5 bits which specify a 10-bit address, the two MSbs
of the address, and the R/W bit. The second byte is the remaining 8 bits of the address.
Figure A-2: 7-bit Address Format
Figure A-3: I2C 10-bit Address Format
S R/W ACK
Sent by
Slave
Slave Address
S
R/W Read/Write pulse
MSb LSb
START Condition
ACK Acknowledge
S 1 1 1 1 0 A9 A8R/W ACK A7 A6 A5 A4 A3 A2 A1 A0 ACK
Sent By Slave
= 0 for write
S
R/W
ACK
- START Condition
- Read/Write Pulse
- Acknowledge
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Section 36. Appendix
Appendix
36
A.3 Transfer Acknowledge
All data must be transmitted per byte, with no limit to the number of bytes transmitted per data
transfer. After each byte, the slave-receiver generates an acknowledge bit (ACK) (Figure A-4).
When a slave-receiver doesn’t acknowledge the slave address or received data, the master must
abort the transfer. The slave must leave SDA high so that the master can generate the STOP
condition (Figure A-1).
Figure A-4: Slave-Receiver Acknowledge
If the master is receiving the data (master-receiver), it generates an acknowledge signal for each
received byte of data, except for the last byte. To signal the end of data to the slave-transmitter,
the master does not generate an acknowledge (not acknowledge). The slave then releases the
SDA line so the master can generate the STOP condition. The master can also generate the
STOP condition during the acknowledge pulse for valid termination of data transfer.
If the slave needs to delay the transmission of the next byte, holding the SCL line low will force
the master into a wait state. Data transfer continues when the slave releases the SCL line. This
allows the slave to move the received data or fetch the data it needs to transfer before allowing
the clock to start. This wait state technique can also be implemented at the bit level, Figure A-5.
Figure A-5: Data Transfer Wait State
S
Data
Output by
Transmitter
Data
Output by
Receiver
SCL from
Master
START
Condition
Clock Pulse for
Acknowledgment
not acknowledge
acknowledge
1 2 8 9
1 2 7 8 9 123 • 8 9 P
SDA
SCL S
START
Condition Address R/W ACK Wait
State
Data ACK
MSb Acknowledgment
Signal from Receiver
Acknowledgment
Signal from Receiver Byte Complete
Interrupt with Receiver
Clock Line Held Low while
Interrupts are Serviced
STOP
Condition
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Figure A-6 and Figure A-7 show Master-transmitter and Master-receiver data transfer
sequences.
Figure A-6: Master-Transmitter Sequence
Figure A-7: Master-Receiver Sequence
For 7-bit address:
S
Slave Address
(Code + A9:A8)
S R/W A1 Slave Address
(A7:A0)
A2 Data A Data P
A master transmitter addresses a slave receiver
with a 10-bit address.
A/A
Slave Address R/W A Data A Data A/A P
'0' (write) data transferred
(n bytes - acknowledge)
A master transmitter addresses a slave receiver with a
7-bit address. The transfer direction is not changed.
From master to slave
From slave to master
A = acknowledge (SDA low)
A = not acknowledge (SDA high)
S = START Condition
P = STOP Condition
(write)
For 10-bit address:
For 7-bit address:
S
Slave Address
(Code + A9:A8)
S R/W A1 Slave Address
(A7:A0)
A2
A master transmitter addresses a slave receiver
with a 10-bit address.
Slave Address R/W A Data A Data A P
'1' (read) data transferred
(n bytes - acknowledge)
A master reads a slave immediately after the first byte.
From master to slave
From slave to master
A = acknowledge (SDA low)
A = not acknowledge (SDA high)
S = START Condition
P = STOP Condition
(write)
For 10-bit address:
Slave Address
(Code + A9:A8)
Sr R/W A3 A Data A P Data
(read)
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Section 36. Appendix
Appendix
36
When a master does not wish to relinquish the bus (which occurs by generating a STOP condition),
a repeated START condition (Sr) must be generated. This condition is identical to the
START condition (SDA goes high-to-low while SCL is high), but occurs after a data transfer
acknowledge pulse (not the bus-free state). This allows a master to send “commands” to the
slave and then receive the requested information or to address a different slave device. This
sequence is shown in Figure A-8.
Figure A-8: Combined Format
Combined format:
S
Combined format - A master addresses a slave with a 10-bit address, then transmits
Slave Address R/W A Data A/A Sr P
(read) Sr = repeated
Transfer direction of data and acknowledgment bits depends on R/W bits.
From master to slave
From slave to master
A = acknowledge (SDA low)
A = not acknowledge (SDA high)
S = START Condition
P = STOP Condition
Slave Address
(Code + A9:A8)
Sr R/W A
(write)
data to this slave and reads data from this slave.
Slave Address
(A7:A0)
Data Sr Slave Address
(Code + A9:A8)
A A Data A/A R/W A Data A A Data P
(read)
Slave Address R/W A Data A/A
START Condition
(write) Direction of transfer
may change at this point
(read or write)
(n bytes + acknowledge)
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A.4 Multi-master
The I2C protocol allows a system to have more than one master. This is called a multi-master
system. When two or more masters try to transfer data at the same time, arbitration and synchronization
occur.
A.4.1 Arbitration
Arbitration takes place on the SDA line, while the SCL line is high. The master which transmits a
high when the other master transmits a low, loses arbitration (Figure A-9) and turns off its data
output stage. A master which lost arbitration can generate clock pulses until the end of the data
byte where it lost arbitration. When the master devices are addressing the same device, arbitration
continues into the data.
Figure A-9: Multi-Master Arbitration (Two Masters)
Masters that also incorporate the slave function, and have lost arbitration must immediately
switch over to slave-receiver mode. This is because the winning master-transmitter may be
addressing it.
Arbitration is not allowed between:
• A repeated START condition
• A STOP condition and a data bit
• A repeated START condition and a STOP condition
Care needs to be taken to ensure that these conditions do not occur.
Transmitter 1 Loses Arbitration
DATA 1 SDA
DATA 1
DATA 2
SDA
SCL
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Section 36. Appendix
Appendix
36
A.4.2 Clock Synchronization
Clock synchronization occurs after the devices have started arbitration. This is performed using
a wired-AND connection to the SCL line. A high to low transition on the SCL line causes the concerned
devices to start counting off their low period. Once a device clock has gone low, it will hold
the SCL line low until its SCL high state is reached. The low to high transition of this clock may
not change the state of the SCL line, if another device clock is still within its low period. The SCL
line is held low by the device with the longest low period. Devices with shorter low periods enter
a high wait-state, until the SCL line comes high. When the SCL line comes high, all devices start
counting off their high periods. The first device to complete its high period will pull the SCL line
low. The SCL line high time is determined by the device with the shortest high period,
Figure A-10.
Figure A-10:Clock Synchronization
CLK 1
CLK 2
SCL
Wait
State
Start Counting
High Period
Counter
Reset
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Table A-2 and Table A-3 show the specifications of a compliant I2
C bus. The column titled Microchip
Parameter No. is provided to ease the user’s correlation to the corresponding parameter in
the device data sheet. Figure A-11 and Figure A-12 show these times on the appropriate waveforms.
Figure A-11: I2C Bus Start/Stop Bits Timing Specification
Table A-2: I2C Bus Start/Stop Bits Timing Specification
Figure A-12: I2C Bus Data Timing Specification
Microchip
Parameter
No.
Sym Characteristic Min Typ Max Units Conditions
90 TSU:STA START condition 100 kHz mode 4700 — — ns Only relevant for
repeated START condition
Setup time 400 kHz mode 600 — —
91 THD:STA START condition 100 kHz mode 4000 — — ns After this period the first
Hold time 400 kHz mode 600 — — clock pulse is generated
92 TSU:STO STOP condition 100 kHz mode 4700 — — ns
Setup time 400 kHz mode 600 — —
93 THD:STO STOP condition 100 kHz mode 4000 — — ns
Hold time 400 kHz mode 600 — —
91 93
SCL
SDA
START
Condition
STOP
Condition
90 92
90
91 92
100
101
103
106
107
109 109
110
102
SCL
SDA
In
SDA
Out MSb
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Section 36. Appendix
Appendix
36
Table A-3: I2
C Bus Data Timing Specification
Microchip
Parameter
No.
Sym Characteristic Min Max Units Conditions
100 THIGH Clock high time 100 kHz mode 4.0 — µs
400 kHz mode 0.6 — µs
101 TLOW Clock low time 100 kHz mode 4.7 — µs
400 kHz mode 1.3 — µs
102 TR SDA and SCL
rise time
100 kHz mode — 1000 ns
400 kHz mode 20 +
0.1Cb
300 ns Cb is specified to be from
10 to 400 pF
103 TF SDA and SCL fall
time
100 kHz mode — 300 ns
400 kHz mode 20 +
0.1Cb
300 ns Cb is specified to be from
10 to 400 pF
90 TSU:STA START condition
setup time
100 kHz mode 4.7 — µs Only relevant for repeated
400 kHz mode 0.6 — µs START condition
91 THD:STA START condition
hold time
100 kHz mode 4.0 — µs After this period the first
400 kHz mode 0.6 — µs clock pulse is generated
106 THD:DAT Data input hold
time
100 kHz mode 0 — ns
400 kHz mode 0 0.9 µs
107 TSU:DAT Data input setup
time
100 kHz mode 250 — ns Note 2
400 kHz mode 100 — ns
92 TSU:STO STOP condition
setup time
100 kHz mode 4.7 — µs
400 kHz mode 0.6 — µs
109 TAA Output valid from
clock
100 kHz mode — 3500 ns Note 1
400 kHz mode — 1000 ns
110 TBUF Bus free time 100 kHz mode 4.7 — µs Time the bus must be free
before a new transmission
can start
400 kHz mode 1.3 — µs
D102 Cb Bus capacitive loading — 400 pF
Note 1: As a transmitter, the device must provide this internal minimum delay time to bridge the undefined region
(min. 300 ns) of the falling edge of SCL to avoid unintended generation of START or STOP conditions.
2: A fast-mode I2C-bus device can be used in a standard-mode I2C-bus system, but the requirement
TSU;DAT ≥ 250 ns must then be met. This will automatically be the case if the device does not stretch the
LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL signal, it must output
the next data bit to the SDA line
TR max.+TSU;DAT = 1000 + 250 = 1250 ns (according to the standard-mode I2C bus specification) before the
SCL line is released.
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APPENDIX B: CAN OVERVIEW
This appendix provides an overview of the Controller Area Network (CAN) bus. The CAN Section
of this reference manual discusses the implementation of the CAN protocol in that hardware
module.
Not available at this time.
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Section 36. Appendix
Appendix
36
APPENDIX C: MODULE BLOCK DIAGRAMS AND REGISTERS
This appendix summarizes the block diagrams of the major circuits.
Not available at this time.
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APPENDIX D: REGISTER DEFINITIONS
This appendix summarizes the register definitions.
Not available at this time.
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Section 36. Appendix
Appendix
36
APPENDIX E: MIGRATION TIPS
This appendix gives an overview of some things that need to be taken into account when migrating
code from other PICmicro families to the PIC18CXXX. For additional information, please also
refer to the following application notes:
• AN716
• AN726
Three major changes Timer0 has from the mid-range family are:
1. The Timer0 no longer shares the prescaler with the Watchdog Timer.
2. Timer0 has 16-bit as well as 8-bit capability.
3. Timer0 can now be turned off.
The default state for Timer0 is an 8-bit counter for downward compatibility with the mid-range
Timer0.
The prescaler is no longer shared between the Timer0 module and the Watchdog Timer. Each
have their own separate prescalers.
Thus, a prescaler assignment for the Timer0 has no effect on the Watchdog Timer, and
vice-versa.
T1OSCEN bit is now OSCEN.
The program space is implemented as a single contiguous block, as compared to Microchip’s
mid-range and high-end controllers that divided the program memory into pages.
If interrupt priority is not used, all interrupts are treated as high priority, and function the same
way as in mid-range and high-end controllers.
If interrupt priority is not used (all interrupt priority bits are set), GIE and PEIE/GIEL function the
same as mid-range and high-end controllers.
Look-up tables are implemented two ways in the 18CXXX devices. The Computed Goto is compatible
with the PIC16CXXX and PIC17CXXX parts. Code written for those devices will run on
the PIC18CXXX devices with little or no change.
Table reads are implemented on the PIC17CXXX and PIC18CXXX devices. However, table
operations on the PIC18CXXX work differently than on the PIC17CXXX.
Note: The Timer0 prescaler is not shared with the watchdog as a postscaler. The Watchdog
Timer has its own dedicated postscaler. The control bits and prescaler select
bits are implemented as EPROM configuration bits.
Note: To achieve a 1:1 prescaler assignment for the TMR0 register, turn off the TMR0
prescaler (PSA is cleared).
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E.1 Differences to the Mid-Range CCP module
The CCP1 and CCP2 modules function exactly as the modules of the mid-range devices with
two exceptions:
1. The time base used for capture and compare of the CCP module can come from either
Timer1 or Timer3. The default time base for both CCP modules when configured as a capture
or compare mode is Timer1. Timer3 can be selected by configuring the Timer3
T3CCPx control bits in the Timer3 control register.
2. A toggle on compare mode has been added to the CCP modules.
E.1.1 Compatibility to PIC16CXX Interrupts
When the IPE bit in the RCON register is clear, the GIE/GIEH bit (INTCON<7>) is the global interrupt
enable for all interrupts. The PEIE/GIEL bit (INTCON<6>) is still used to enable peripheral
interrupts. The high priority interrupt vector is the same as the PIC16CXX interrupt vector and
returns will work the same way. ISR code written for the PIC16CXX devices run unchanged as
long as IPE=0.
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Section 36. Appendix
Appendix
36
E.2 Instruction Set Comparison
Table E-1 shows all the PIC18CXXX instructions and if that instruction is available in the other
families (PIC17CXXX, PIC16CXX, or PIC16C5XX). Some instructions may be available, but
have slightly different characteristics. Attached are notes regarding any major differences.
Table E-1: PIC18CXXX Instruction Set Comparison
BYTE-ORIENTED FILE REGISTER OPERATIONS
PIC18CXXX Instruction Set PIC17CXX PIC16CXX PIC16C5X
ADDWF Yes Yes Yes
ADDWFC Yes — —
ANDWF Yes Yes Yes
CLRF Yes (Note 1) Yes Yes
COMF Yes Yes Yes
CPFSEQ Yes — —
CPFSGT Yes — —
CPFSLT Yes — —
DAW Yes (Note 5) — —
DCFSNZ Yes — —
DECF Yes Yes Yes
DECFSZ Yes Yes Yes
INCF Yes Yes Yes
INCFSZ Yes Yes Yes
INFSNZ Yes — —
IORWF Yes Yes Yes
MOVF — Yes Yes
MOVFF — ——
MOVWF Yes Yes Yes
MULWF Yes — —
NEGF Yes (Note 6) — —
NOP Yes Yes Yes
Note 1: CLRF and SETF instructions do not have ’s’ bit that exists in the PIC17CXX instructions.
2: CLRW does not exist as an instruction, but since the WREG is mapped in address space, WREG can be
cleared using the CLRF instruction.
3: The RLCF and RRCF instructions are functionally identical to the PIC16CXX instructions RLF and RRF.
4: CALL and GOTO instructions are now 2-word instructions.
5: DAW always has the WREG as the destination. The PIC17CXX can also have a file as the destination.
6: NEGW is replaced by NEGF with the file register always being the destination.
7: The mnemonics for 17CXX instructions TABLRD and TABLWT are changed to TBLRD and TBLWT, respectively,
and these instructions are special instructions which only exchange data between the TABLAT and
the program memory.
8: The lower nibble of the Bank Select Register (BSR) now specifies which bank of RAM is selected.
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BYTE-ORIENTED FILE REGISTER OPERATIONS (Continued)
Instruction Set PIC17CXX PIC16CXX PIC16C5X
RLCF Yes Yes (Note 3) Yes (Note 3)
RLNCF Yes — —
RRCF Yes Yes (Note 3) Yes (Note 3)
RRNCF Yes — —
SETF Yes (Note 1) — —
SUBFWB — ——
SUBWF Yes Yes Yes
SUBWFB Yes — —
SWAPF Yes Yes Yes
TABLRD Yes (Note 7) — —
TABLWT Yes (Note 7) — —
TSTFSZ Yes — —
XORWF Yes Yes Yes
BIT-ORIENTED FILE REGISTER OPERATIONS
Instruction Set PIC17CXX PIC16CXX PIC16C5X
BCF Yes Yes Yes
BSF Yes Yes Yes
BTFSC Yes Yes Yes
BTFSS Yes Yes Yes
BTG Yes — —
Note 1: CLRF and SETF instructions do not have ’s’ bit that exists in the PIC17CXX instructions.
2: CLRW does not exist as an instruction, but since the WREG is mapped in address space, WREG can be
cleared using the CLRF instruction.
3: The RLCF and RRCF instructions are functionally identical to the PIC16CXX instructions RLF and RRF.
4: CALL and GOTO instructions are now 2-word instructions.
5: DAW always has the WREG as the destination. The PIC17CXX can also have a file as the destination.
6: NEGW is replaced by NEGF with the file register always being the destination.
7: The mnemonics for 17CXX instructions TABLRD and TABLWT are changed to TBLRD and TBLWT, respectively,
and these instructions are special instructions which only exchange data between the TABLAT and
the program memory.
8: The lower nibble of the Bank Select Register (BSR) now specifies which bank of RAM is selected.
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Section 36. Appendix
Appendix
36
CONTROL OPERATIONS
Instruction Set PIC17CXX PIC16CXX PIC16C5X
BC — ——
BN — ——
BNC — ——
BNN — ——
BNV — ——
BNZ — ——
BRA — ——
BV — ——
BZ — ——
CALL (Note 4) Yes Yes Yes
CLRWDT Yes Yes Yes
GOTO (Note 4) Yes Yes Yes
POP — ——
PUSH — ——
RCALL — ——
RESET — ——
RETFIE Yes Yes
RETURN Yes Yes Yes
SLEEP Yes Yes Yes
LITERAL OPERATIONS
Instruction Set PIC17CXX PIC16CXX PIC16C5X
ADDLW Yes Yes Yes
ANDLW Yes Yes Yes
IORLW Yes Yes Yes
LFSR — ——
MOVLB Yes (Note 8) — —
MOVLW Yes Yes Yes
MULLW Yes — —
RETLW Yes Yes Yes
SUBLW Yes Yes Yes
XORLW Yes Yes Yes
Note 1: CLRF and SETF instructions do not have ’s’ bit that exists in the PIC17CXX instructions.
2: CLRW does not exist as an instruction, but since the WREG is mapped in address space, WREG can be
cleared using the CLRF instruction.
3: The RLCF and RRCF instructions are functionally identical to the PIC16CXX instructions RLF and RRF.
4: CALL and GOTO instructions are now 2-word instructions.
5: DAW always has the WREG as the destination. The PIC17CXX can also have a file as the destination.
6: NEGW is replaced by NEGF with the file register always being the destination.
7: The mnemonics for 17CXX instructions TABLRD and TABLWT are changed to TBLRD and TBLWT, respectively,
and these instructions are special instructions which only exchange data between the TABLAT and
the program memory.
8: The lower nibble of the Bank Select Register (BSR) now specifies which bank of RAM is selected.
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Table E-2 shows the instructions that are used in the other PICmicro families, but are not used in
the PIC18CXXX instruction set.
Table E-2: Instructions Not Implemented or Modified From PIC18CXXX
BYTE-ORIENTED FILE REGISTER OPERATIONS
Instruction PIC17CXX PIC16CXX PIC16C5X Comment
CLRW — Yes (Note 1) — = CLRF WREG
DAW Yes (Note 6) — —
MOVFP Yes (Note 7) — — = MOVFF REG1, REG2
MOVPF Yes (Note 7) — — = MOVFF REG2, REG1
NEGW Yes (Note 3) — —
RLF — Yes (Note 4) Yes (Note 4)
RRF — Yes (Note 4) Yes (Note 4)
TLRD Yes — —
TLWT Yes — —
CONTROL OPERATIONS
Instruction PIC17CXX PIC16CXX PIC16C5X
CALL Yes (Note 2) Yes (Note 2) Yes (Note 2)
GOTO Yes (Note 2) Yes (Note 2) Yes (Note 2)
LCALL Yes — —
MOVLR Yes — —
OPTION — — (Note 5) Yes
TRIS — — (Note 5) Yes
LITERAL OPERATIONS
Instruction PIC17CXX PIC16CXX PIC16C5X
MOVLR Yes — —
Note 1: CLRW does not exist as an instruction, but since the WREG is mapped in address space, WREG can be
cleared using the CLRF instruction.
2: CALL and GOTO instructions are now 2-word instructions.
3: NEGW is replaced by NEGF with the file register always being the destination.
4: The mnemonics for RLF and RRF have been changed to RLCF and RRCF, respectively, but the functionality
is identical.
5: This instruction is not recommended in PIC16CXX devices.
6: The PIC17CXX may also specify the file as the destination.
7: When migrating software the MOVFF instruction can be used.
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2000 Microchip Technology Inc. DS39537A-page 36-21
Section 36. Appendix
Appendix
36
APPENDIX F: ASCII CHARACTER SET
The PICmicro assembler recognizes the ASCII characters shown in Table F-1.
Table F-1: ASCII Character Set (7-bit Code)
Least
Significant
nibble (LSn)
Most Significant nibble (MSn)
0
(0)
1
(16)
2
(32)
3
(48)
4
(64)
5
(80)
6
(96)
7
(112)
0 NUL DLE SP 0 @ P ’ p
1 SOH DC1 ! 1 A Q a q
2 STX DC2 " 2 B R b r
3 ETX DC3 # 3 C S c s
4 EOT DC4 $ 4 D T d t
5 ENQ NAK % 5 E U e u
6 ACK SYN & 6 F V f v
7 BEL ETB ’ 7 GWg w
8 BS CAN ( 8 H X h x
9 HT EM ) 9 I Y i y
A LF SUB * : J Z j z
B VT ESC + ; K [ k {
C FF FS , < L \ l |
D CR GS — =M ] m}
E SO RS . > N ^ n ~
F SI US / ? O _ o DEL
Note: To obtain the decimal value, add the decimal most significant nibble (MSn) to the decimal least significant
nibble (LSn).
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DS39537A-page 36-22 2000 Microchip Technology Inc.
APPENDIX G: COMMON SOCKET PINOUTS
This appendix shows the pinouts for some of the standard sockets that are commonly used in
prototype and production applications. You may use these pinouts when you wiretap your breadboard
with a socket. These diagrams will make constructing, debugging, and troubleshooting
with the Picmicro families quicker and easier.
These figures shown in this appendix are for sockets that correspond to the following package
types:
PLCC-to-PGA sockets
• 28-pin PLCC/CLCC
• 44-pin PLCC/CLCC
• 68-pin PLCC/CLCC
DIP sockets
• 18-pin
• 28-pin
• 40-pin
SOIC sockets
• 18-pin
• 28-pin
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2000 Microchip Technology Inc. DS39537A-page 36-23
Section 36. Appendix
Appendix
36
Figure G-1: DIP Packages Pinouts (Bottom View )
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
18-pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
28-pin
40-pin
Bottom
View
Bottom
View
Bottom
View
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PIC18C Reference Manual
DS39537A-page 36-24 2000 Microchip Technology Inc.
Figure G-2: PGA Package Pinout (Bottom View) for LCC Packages
26 28
25 27 1 3 6 5
2 4
23 24
21 22
19 20 17 15
16 14
13
12
11
10 9
18
8 7
28-pin
42 44
39 43 1 3 5 7
2 4
35
31
29 27 25 23
24 22
21
18
17
15
26
11
33 13
37 9
41
36
32
30
34
38
8
19
16
12
14
10
28
6
20
40
44-pin
Bottom
View
Bottom
View
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2000 Microchip Technology Inc. DS39537A-page 36-25
Section 36. Appendix
Appendix
36
Figure G-2: PGA Package Pinout (Bottom View) for LCC Packages (Continued)
61 63
62 64 66 2
12
65 67
35 27
25
23
24
21 20
18
17
15
41 37 33
38 36 34 32 30
8
19
14
13
28
6
22
4
16
1
44
3 579
60 68 11 10
31 29
40
39
42
43
45
46 47
48 49
50 51
52 53
54 55
56 57
58 59
26
68-pin
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DS39537A-page 36-26 2000 Microchip Technology Inc.
Figure G-2: PGA Package Pinout (Bottom View) for LCC Packages (Continued)
75 77
76 78 80 2
79 83
41 33
25
23
24
21 20
18
17
15
47 43 39
44 42 38 36 40
8
19
14
27
6
22
4
16
1
54
3579
74 84 10 13
37 35
46
45
48
49
50
56 57
58 59
60 61
62 63
64 65
66 67
68 69
26
84-pin
Bottom
View
11
12
29 28
31 30
34 32
51
52
53
55
70 71
72 73
82
81
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2000 Microchip Technology Inc. DS39537A-page 36-27
Section 36. Appendix
Appendix
36
Figure G-3: SOIC Socket Pinouts (Bottom View)
18
16
14
12
10
2
4
1
17
15
11
13
5
9
8
3
6
7
28
27
25
21
23
24
20
26
22
19
15
17
1
2
4
8
6
5
9
3
7
18
16
10
14
12
11
13
18-pin
28-pin
Bottom
View
Bottom
View
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DS39537A-page 36-28 2000 Microchip Technology Inc.
APPENDIX H: REVISION HISTORY
Revision A
This is the initial released revision of the Enhanced MCU Reference Guide Appendix.
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2000 Microchip Technology Inc. DS39538A-page 37-1
Glossary
37
Section 37. Glossary
A
A/D
See description under "Analog to Digital (A/D)".
Access RAM
This is a region of data memory RAM that can be accessed regardless of the currently selected
bank. This allows special function registers to be accessed by the instruction without changing
the currently selected bank. Access RAM also contains some General Purpose Registers
(GPRs). This is useful for the saving of required variables during context switching (such as during
an interrupt).
Acquisition Time (TACQ)
This is related to Analog to Digital (A/D) converters. This is the time that the PIC18CXXX A/D’s
holding capacitor acquires the analog input voltage level connected to it. When the GO bit is set,
the analog input is disconnected from the holding capacitor and the A/D conversion is started.
ALU
Arithmetical Logical Unit. Device logic that is responsible for the mathematical (add, subtract, ...),
logical (and, or, ...), and shifting operation.
Analog to Digital (A/D)
The conversion of an analog input voltage to a ratiometric digital equivalent value.
Assembly Language
A symbolic language that describes the binary machine code in a readable form.
AUSART
Addressable Universal Synchronous Asynchronous Receiver Transmitter. This module can
either operate as a full duplex asynchronous communications port, or a half duplex synchronous
communications port. When operating in the asynchronous mode, the USART can be interfaced
to a PC’s serial port.
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B
Bank
This is a method of addressing Data Memory. Since enhanced devices have 8-bits for direct
addressing, instructions can address up to 256 bytes. To allow more data memory to be present
on a device, data memory is partitioned into contiguous banks of 256 bytes each. To select the
desired bank, the bank selection register (BSR) needs to be appropriately configured. 16 banks
can be implemented.
Baud
Generally this is how the communication speed of serial ports is described. Equivalent to bits per
second (bps).
BCD
See description under "Binary Coded Decimal (BCD)".
Binary Coded Decimal (BCD)
Each 4-bit nibble expresses a digit from 0-9. Usually two digits are contained in a byte yielding a
range of 0 - 99.
BOR
See description under "Brown-out Reset (BOR)".
Brown-out
A condition where the supply voltage of the device temporarily falls below the specified minimum
operation point. This can occur when a load is switched on and causes the system/device voltage
to drop.
Brown-out Reset (BOR)
Circuitry which will force the device to the RESET state if the device’s power supply voltage falls
below a specified voltage level. Some devices have an internal BOR circuit, while other devices
would require an external circuit to be created.
Bus width
This is the number of bits of information that a bus carries. For the Data Memory, the bus width
is 8-bits. For enhanced devices the Program Memory bus width is 16-bits.
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Section 37. Glossary
Glossary
37
C
Capture
A function of the CCP module in which the value of a timer/counter is “captured” into a holding
register module when a predetermined event occurs.
CCP
Capture, Compare, Pulse Width Modulation (PWM). The CCP module can be configured to operate
as an input capture, or a timer compare, or a PWM output.
Compare
A function of the CCP module in which the device will perform an action when a timer’s register
value matches the value in the compare register.
Compare Register
A 16-bit register that contains a value that is compared to the 16-bit TMR1 register. The compare
function triggers when the counter matches the contents of the compare register.
Capture Register
A 16-bit register that is loaded with the value of the 16-bit TMR1 register when a capture event
occurs.
Configuration Word
This is a non-volatile memory location that specifies the characteristics that the device will have
for operation (such as oscillator mode, WDT enable, start-up timer enables). These characteristics
can be specified at the time of device programming. For EPROM memory devices, as long
as the bit is a '1', it may at a later time be programmed as a '0'. The device must be erased for a
'0' to be returned to a '1'.
Conversion Time (Tconv)
This is related to Analog to Digital (A/D) converters. This is the time that the PIC18CXXX A/D’s
converter requires to convert the analog voltage level on the holding capacitor to a digital value.
CPU
Central Processing Unit. Decodes the instructions, and determines the operands and operations
that are needed for program execution. Arithmetic, logical, or shift operations are passed to the
ALU.
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D
D/A
See description under "Digital to Analog".
DAC
Digital to analog converter.
Data Bus
The bus which is used to transfer data to and from the data memory.
Data EEPROM
Data Electrically Erasable Programmable Read Only Memory. This memory is capable of being
programmed and re-programmed by the CPU to ensure that in the case of a power loss, critical
values/variables are retained in the non-volatile memory.
Data Memory
The memory that is on the Data Bus. This memory is volatile (SRAM) and contains both the Special
Function Registers and General Purpose Registers.
Direct Addressing
When the Data Memory Address is contained in the Instruction. The execution of this type of
instruction will always access the data at the embedded address.
Digital to Analog
The conversion of a digital value to an equivalent ratiometric analog voltage.
E
EEPROM
Electrically Erasable Programmable Read Only Memory. This memory has the capability to be
programmed and erased in-circuit.
EPROM
Electrically Programmable Read Only Memory. This memory has the capability to be programmed
in-circuit. Erasing requires that the program memory be exposed to UV light.
EXTRC
External Resistor-Capacitor (RC). Some devices have a device oscillator option that allows the
clock to come from an external RC. This is the same as RC mode on some devices.
F
FLASH Memory
This memory has the capability to be programmed and erased in-circuit. Program Memory technology
that is almost functionally equivalent to Program EEPROM Memory.
FOSC
Frequency of the device oscillator.
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Section 37. Glossary
Glossary
37
G
GIO
General Input/Output.
GPIO
General Purpose Input/Output.
GPR
General Purpose Register (RAM). A portion of the data memory that can be used to store the
program’s dynamic variables.
H
Harvard Architecture
In this architecture, the Program Memory and Data Memory buses are separated. This allows
concurrent accesses to Data Memory and Program Memory, which increases the performance
of the device. All PICmicro devices implement a Harvard Architecture.
Holding Capacitor
This is a capacitor in the Analog to Digital (A/D) module which “holds” an analog input level once
a conversion is started. During acquisition, the holding capacitor is charged/discharged by the
voltage level on the analog input pin. Once the conversion is started, the holding capacitor is disconnected
from the analog input and “holds” this voltage for the A/D conversion.
HS
High Speed. One of the device oscillator modes. The oscillator circuit is tuned to support the high
frequency operation. Currently this allows for operation from 4 MHz to 25 MHz.
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I
I
2C
Inter-Integrated Circuit. This is a two wire communication interface. This feature is one of the
modes of the "SSP" and "MSSP" modules.
Indirect Addressing
When the Data Memory Address is not contained in the Instruction, the instruction operates on
the INDF address, which causes the Data Memory Address to be the value in the FSR register.
The execution of the instruction will always access the data at the address pointed to by the FSR
register.
Instruction Bus
The bus which is used to transfer instruction words from the program memory to the CPU.
Instruction Fetch
Due to the Harvard architecture, when one instruction is to be executed, the next location in program
memory is “fetched” and ready to be decoded as soon as the currently executing instruction
is completed.
Instruction Cycle
The events for an instruction to execute. There are four events which can generally be described
as: Decode, Read, Execute, and Write. Not all events will be done by all instructions. To see the
operations during the instruction cycle, please look at the description of each instruction. Four
external clocks (Tosc) make one instruction cycle (TCY).
Interrupt
A signal to the CPU that causes the program flow to be forced to the Interrupt Vector Address
(04h in program memory). Before the program flow is changed, the contents of the Program
Counter (PC) are forced onto the hardware stack, so that program execution may return to the
interrupted point.
INTRC
Internal Resistor-Capacitor (RC). Some devices have a device oscillator option that allows the
clock to come from an internal RC combination.
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2000 Microchip Technology Inc. DS39538A-page 37-7
Section 37. Glossary
Glossary
37
L
LCD
Liquid Crystal Display. Useful for giving visual status of a system. This may require the specification
of custom LCD glass.
LED
Light Emitting Diode. Useful for giving visual status of a system.
Literal
This is a constant value that is embedded in an instruction word.
Long Word Instruction
An instruction word that embeds all the required information (opcode and data) into a single
word. This ensures that every instruction is accessed and executed in a single instruction cycle.
LP
One of the device oscillator modes. Used for low frequency operation which allows the oscillator
to be tuned for low power consumption. Operation is up to 200 kHz.
LSb
Least Significant Bit.
LSB
Least Significant Byte.
M
Machine cycle
This is a concept where the device clock is divided down to a unit time. For PICmicro devices,
this unit time is 4 times the device oscillator (4TOSC), also known as TCY.
MSb
Most Significant Bit.
MSB
Most Significant Byte.
MSSP
Master Synchronous Serial Port. The MSSP has two operational functions. The first is a "Serial
Peripheral Interface (SPI)" and the second is the Inter-Integrated Circuit ("I2
C"). The I2C function
supports both master and slave functions in hardware.
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N
Non-Return to Zero (NRZ)
Two-level encoding used to transmit data over a communications medium. A bit value of '1' indicates
a high voltage signal. A bit value of '0' indicates a low voltage signal. The data line defaults
to a high level.
NRZ
See description under "Non-Return to Zero (NRZ)".
O
Opcode
The portion of the 16-bit instruction word that specifies the operation that needs to occur. The
opcode is of variable length depending on the instruction that needs to be executed. The opcode
varies from 4-bits to 8-bits. The remainder of the instruction word contains program or data memory
information.
Oscillator Start-up Timer (OST)
This timer counts 1024 crystal/resonator oscillator clock cycles before releasing the internal
RESET signal.
OST
See description under "Oscillator Start-up Timer (OST)".
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2000 Microchip Technology Inc. DS39538A-page 37-9
Section 37. Glossary
Glossary
37
P
Pages
Method of addressing the Program Memory. Mid-range devices have 11-bit addressing for CALL
and GOTO instructions, which gives these instructions a 2-Kword reach. To allow more program
memory to be present on a device, program memory is partitioned into contiguous pages, where
each page is 2-Kwords. To select the desired page, the page selection bits (PCLATCH<5:4>)
need to be appropriately configured. Since there are presently 2 page selection bits, 4 pages can
be implemented. The enhanced devices do not have paging. PIC16CXXX code migrates to the
PIC18CXXX without modification (with respect to paging). Optimization may be implemented.
Parallel Slave Port (PSP)
A parallel communication port which is used to interface to a microprocessor’s 8-bit data bus.
POP
A term used to refer to the action of restoring information from a stack (software and/or hardware).
See "Serial Peripheral Interface (SPI)".
Postscaler
A circuit that slows the rate of the interrupt generation (or WDT Reset) from a counter/timer by
dividing it down.
Power-on Reset (POR)
Circuitry which determines if the device power supply voltage rose from a powered down level
(0V). If the device power supply voltage is rising from ground, a device RESET occurs and the
PWRT is started.
Power-up Timer (PWRT)
A timer which holds the internal RESET signal low for a timed delay to allow the device voltage
to reach the valid operating voltage range. Once the timer times out, the OST circuitry is enabled
(for all crystal/resonator device oscillator modes).
Prescaler
A circuit that slows the rate of a clocking source to a counter/timer.
Program Bus
The bus used to transfer instruction words from the program memory to the CPU.
Program Counter
A register which specifies the address in program memory that contains the next instruction to
execute.
Program Memory
Any memory that is on the program memory bus. Static variables may be contained in program
memory, such as tables.
PSP
See description under "Parallel Slave Port (PSP)".
Pulse Width Modulation (PWM)
A serial signal in which the information is contained in the width of a (high) pulse of a constant
frequency signal. A PWM output, from the CCP module, of the same duty cycle requires no software
overhead.
PUSH
A term used to refer to the action of saving information onto a stack (software and/or hardware).
See "Serial Peripheral Interface (SPI)".
PWM
See description under "Pulse Width Modulation (PWM)".
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DS39538A-page 37-10 2000 Microchip Technology Inc.
Q
Q-cycles
This is the same as a device oscillator cycle. There are 4 Q-cycles for each instruction cycle.
R
RC
Resistor-Capacitor. The default configuration for the device oscillator. This allows a
“Real-Cheap” implementation for the device clock source. This clock source does not supply an
accurate time-base.
Read-Modify-Write
This is where a register is read, then modified, and then written back to the original register. This
may be done in one instruction cycle or multiple instruction cycles.
Register File
This is the Data Memory. Contains the SFRs and GPRs.
ROM
Read Only Memory. Memory that is fixed and cannot be modified.
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Section 37. Glossary
Glossary
37
S
Sampling Time
Sampling time is the complete time to get an A/D result. It includes the acquisition time and the
conversion time.
Serial Peripheral Interface (SPI)
This is one of the modes of the "SSP" and "MSSP" modules. This is typically a 3-wire interface,
with a data out line, a data in line, and a clock line. Since the clock is present, this is a synchronous
interface.
SFR
Special Function Register. These registers contain the control bits and status information for the
device.
Single Cycle Instruction
An instruction that executes in a “single” machine cycle (TCY).
SLEEP
This is a low power mode of the device, where the device’s oscillator circuitry is disabled. This
reduces the current the device consumes. Certain peripherals may be placed into modes where
they continue to operate.
Special Function Registers (SFR)
These registers contain the control bits and status information for the device.
SPI
See description under "Serial Peripheral Interface (SPI)".
SSP
Synchronous Serial Port. The SSP has two operational functions. The first is a "Serial Peripheral
Interface (SPI)"and the second is the Inter-Integrated Circuit ("I2
C"). The I2C function supports
the slave function in hardware and has additional status information to support a software
implemented master.
Stack
A portion of the CPU that retains the return address for program execution. The stack gets loaded
with the value in the Program Counter when a CALL instruction is executed or if an interrupt
occurs.
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T
TAD
In the A/D Converter, the time for a single bit of the analog voltage to be converted to a digital
value.
TCY
The time for an instruction to complete. This time is equal to Fosc/4 and is divided into four
Q-cycles.
Tosc
The time for the single period of the device oscillator.
U
USART
Universal Synchronous Asynchronous Receiver Transmitter. This module can either operate as
a full duplex asynchronous communications port, or a half duplex synchronous communications
port. When operating in the asynchronous mode, the USART can be interfaced to a PC’s serial
port.
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Section 37. Glossary
Glossary
37
V
Voltage Reference (VREF)
A voltage level that can be used as a reference point for A/D conversions (AVDD and AVSS) or the
trip point for comparators.
von Neumann Architecture
In this architecture the Program Memory and Data Memory are contained in the same area and
use the same bus. This means that accesses to the program memory and data memory must
occur sequentially, which affects the performance of the device.
W
W Register
See description under "Working Register (WREG)".
Watchdog Timer (WDT)
Used to increase the robustness of a design by recovering from software flows that were not
expected in the design of the product or from other system related issues. The Watchdog Timer
causes a RESET if it is not cleared prior to overflow. The clock source for a PICmicro device is
an on-chip RC oscillator which enhances system reliability.
WDT
Watchdog Timer.
Working Register (WREG)
Can also be thought of as the accumulator of the device. Also used as an operand in conjunction
with the ALU during two operand instructions.
X
XT
One of the device oscillator modes. Used for operation from 100 kHz to 4 MHz.
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37.1 Revision History
Revision A
This is the initial released revision of the Glossary.
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2000 Microchip Technology Inc. DS39540A-page 36-1
Source Code
Source Code
APPENDIX I: SOURCE CODE
; Software License Agreement
;
; The software supplied herewith by Microchip Technology Incorporated
; (the “Company”) for its PICmicro® Microcontroller is intended and
; supplied to you, the Company’s customer, for use solely and
; exclusively on Microchip PICmicro Microcontroller products. The
; software is owned by the Company and/or its supplier, and is
; protected under applicable copyright laws. All rights are reserved.
; Any use in violation of the foregoing restrictions may subject the
; user to criminal sanctions under applicable laws, as well as to
; civil liability for the breach of the terms and conditions of this
; license.
;
; THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
; WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
; TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
; PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
; IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
; CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
;
;***********************************************************
; PIC18CXX2 EXAMPLE CODE FOR PICDEM-2
;
; TITLE: USART Demo Demonstration
; FILENAME: usart.asm
; REVISION HISTORY: A 5/13/00 jb format change
; HARDWARE: PICDEM-2 board
; FREQUENCY: 4MHz
:
;************************************************************
Software License Agreement
The software supplied herewith by Microchip Technology Incorporated (the “Company”) for its PICmicro® Microcontroller is
intended and supplied to you, the Company’s customer, for use solely and exclusively on Microchip PICmicro Microcontroller products.
The software is owned by the Company and/or its supplier, and is protected under applicable copyright laws. All rights are reserved.
Any use in violation of the foregoing restrictions may subject the user to criminal sanctions under applicable laws, as well as to civil
liability for the breach of the terms and conditions of this license.
THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY,
INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR
SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
39500 18C Reference Manual.book Page 1 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-2
PIC18C Reference Manual
2000 Microchip Technology Inc.
; This program demonstrates basic functionality of the USART.
;
; Port B is connected to 8 LEDs.
; When the PIC18C452 receives a word of data from
; the USART, the value is displayed on the LEDs and
; is retransmitted to the host computer.
;
; Set terminal program to 9600 baud, 1 stop bit, no parity
list p=18c452; set processor type
list n=0; supress page breaks in list file
include
;************************************************************
; Reset and Interrupt Vectors
org 00000h; Reset Vector
gotoStart
org 00008h; Interrupt vector
gotoIntVector
;************************************************************
; Program begins here
org 00020h; Beginning of program EPROM
Start
clrfLATB; Clear PORTB output latches
clrfTRISB ; Config PORTB as all outputs
bcf TRISC,6; Make RC6 an output
movlw19h; 9600 baud @4MHz
movwfSPBRG
bsf TXSTA,TXEN; Enable transmit
bsf TXSTA,BRGH; Select high baud rate
bsf RCSTA,SPEN; Enable Serial Port
bsf RCSTA,CREN; Enable continuous reception
bcf PIR1,RCIF; Clear RCIF Interrupt Flag
bsf PIE1,RCIE; Set RCIE Interrupt Enable
bsf INTCON,PEIE; Enable peripheral interrupts
bsf INTCON,GIE; Enable global interrupts
;************************************************************
; Main loop
39500 18C Reference Manual.book Page 2 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-3
Source Code
Source Code
Main
gotoMain; loop to self doing nothing
;************************************************************
; Interrupt Service Routine
IntVector
; save context (WREG and STATUS registers) if needed.
btfssPIR1,RCIF; Did USART cause interrupt?
gotoOtherInt; No, some other interrupt
movlw06h; Mask out unwanted bits
andwfRCSTA,W; Check for errors
btfssSTATUS,Z; Was either error status bit set?
gotoRcvError; Found error, flag it
movfRCREG,W; Get input data
movwfLATB; Display on LEDs
movwfTXREG; Echo character back
gotoISREnd; go to end of ISR, restore context, return
RcvError
bcf RCSTA,CREN; Clear receiver status
bsf RCSTA,CREN
movlw0FFh; Light all LEDs
movwfPORTB
gotoISREnd; go to end of ISR, restore context, return
OtherInt
goto$ ; Find cause of interrupt and service it before returning from
; interrupt. If not, the same interrupt will re-occur as soon
; as execution returns to interrupted program.
ISREnd
; Restore context if needed.
retfie
end
39500 18C Reference Manual.book Page 3 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-4
PIC18C Reference Manual
2000 Microchip Technology Inc.
;
; Software License Agreement
;
; The software supplied herewith by Microchip Technology Incorporated
; (the “Company”) for its PICmicro® Microcontroller is intended and
; supplied to you, the Company’s customer, for use solely and
; exclusively on Microchip PICmicro Microcontroller products. The
; software is owned by the Company and/or its supplier, and is
; protected under applicable copyright laws. All rights are reserved.
; Any use in violation of the foregoing restrictions may subject the
; user to criminal sanctions under applicable laws, as well as to
; civil liability for the breach of the terms and conditions of this
; license.
;
; THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
; WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
; TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
; PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
; IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
; CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
;
;************************************************************
; PIC18CXX2 EXAMPLE CODE FOR PICDEM-2
;
; TITLE:Button Press Demonstration
; FILENAME: bttn.asm
; REVISION HISTORY: A 5/13/00 jb format change
; HARDWARE: PICDEM-2 board
; FREQUENCY: 4MHz
:
;************************************************************
; This program demonstrates how to read a push-button and control LED's.
;
; Port B is connected to 8 LEDs.
; RA4 is connected to a switch (S2).
; This program increments a file register count every time S2 is pressed.
; The value of count is displayed on the LEDs connected to Port B.
; The LEDs should increment in a binary manner each time S2 is pressed.
list p=18c452
#include
;************************************************************
; variables
Countequ0x000
39500 18C Reference Manual.book Page 4 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-5
Source Code
Source Code
;************************************************************
; reset vectors
org 00000h; Reset Vector
gotoStart
;************************************************************
;program code starts here
org 00020h; Beginning of program EPROM
Start
clrfLATB; Clear PORTB output latch
clrfTRISB; Make PORTB pins all outputs
clrfCount; Clear Count
Loop
btfscPORTA,4; Has S2 been pressed? (Normally high, goes low when pressed.)
gotoLoop; No, check again
IncCount
incfCount,F; Increment Count
movffCount,LATB; move Count to PORTB
Debounce
btfssPORTA,4; Has key been released?
gotoDebounce; No, wait some more
gotoLoop; yes, wait for next key press
END ; directive indicates end of code
39500 18C Reference Manual.book Page 5 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-6
PIC18C Reference Manual
2000 Microchip Technology Inc.
;
; Software License Agreement
;
; The software supplied herewith by Microchip Technology Incorporated
; (the “Company”) for its PICmicro® Microcontroller is intended and
; supplied to you, the Company’s customer, for use solely and
; exclusively on Microchip PICmicro Microcontroller products. The
; software is owned by the Company and/or its supplier, and is
; protected under applicable copyright laws. All rights are reserved.
; Any use in violation of the foregoing restrictions may subject the
; user to criminal sanctions under applicable laws, as well as to
; civil liability for the breach of the terms and conditions of this
; license.
;
; THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
; WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
; TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
; PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
; IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
; CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
;
;************************************************************
; PIC18CXX2 EXAMPLE CODE FOR PICDEM-2
;
; TITLE:I2C hardware interface PICmicro to serial EEPROM
; FILENAME: i2c.asm
; REVISION HISTORY: A 5/13/00 jb format change
; HARDWARE: PICDEM-2 board
; FREQUENCY: 4MHz
:
;************************************************************
; This program uses the advanced features of the PIC18C452, specifically
; full hardware support for master mode I2C
;
; This program loads EEPROM address 0x00 to 0xFF with 0x00 to 0xFF
; (each location contains its own address).
:
; Each location is then read out, and compared to what is expected.
; The data is displayed on the LEDS. If the data is wrong,
; the TX LED will flash briefly before proceeding to the next address.
;
; Revised Version(05-05-99).
; Note: 1) All timing is based on a reference crystal frequency of 4MHz
; which is equivalent to an instruction cycle time of 1 usec.
; 2) Address and literal values are read in hexidecimal unless
; otherwise specified.
; 3) The PIC18C452 MSSP module offers full hardware support for
39500 18C Reference Manual.book Page 6 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-7
Source Code
Source Code
; master mode I2C.
;************************************************************
LIST P=18C452
#include
listn=0 ; suppress list file page breaks
listST=off; suppress list file symbol table
;************************************************************
; Register File Assignment
EEADDRequ0x000; Address register
EEDATAequ0x001; data to read/write
EESLAVE equ 0x002; Device address (1010xxxy)
DelayCtr1equ0x003; delay routine counter
DelayCtr2equ0x004; delay routine counter
SlaveAddrequ0xA0; slave address literal
;************************************************************
; Vector Assignment
ORG 0x00000
gotoStart; Reset Vector
;************************************************************
; Main Program
ORG 0x00020; Start of Program space
Start
; initialize PORTB
clrfLATB; Clear PORTB output latch
clrfTRISB; Set PORTB as all outputs
; configure SSP for hardware master mode I2C
bsf SSPSTAT,SMP; I2C slew rate control disabled
bsf SSPCON1,SSPM3; I2C master mode in hardware
bsf SSPCON1,SSPEN; enable SSP module
movlw0x09; set I2C clock rate to 100kHz
movwfSSPADD
bsf TRISC,3; I2C SCL pin is input
bsf PORTC,3; (will be controlled by SSP)
bsf TRISC,4; I2C SDA pin is input
bsf PORTC,4; (will be controlled by SSP)
movlwSlaveAddr; EEPROM I2C address
39500 18C Reference Manual.book Page 7 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-8
PIC18C Reference Manual
2000 Microchip Technology Inc.
movwfEESLAVE
Main
clrfPORTB; initialize variables
clrfEEDATA
clrfEEADDR
WrEEPROM
bsf PORTB,7; indicate write, light TX LED
rcallDelay
bcf EESLAVE,0; write mode
rcallWakeSlave; gets slave attention
rcallWrADDR; sends EEPROM address
rcallWrDATA; sends data to slave
rcallStop; send stop bit
incfPORTB,F; increment count
incfEEDATA,F; increment data
incfEEADDR,F; Point to next address
btfssEEADDR,7; at end of EEPROM?
gotoWrEEPROM; no, write more data
RdLoop
clrfPORTB; initialize variables
clrfEEDATA
clrfEEADDR
RdEEPROM
rcallDelay
bcf EESLAVE,0; write mode
rcallWakeSlave; gets slave attention
rcallWrADDR; sends EEPROM address
rcallStop; send stop bit
bsf EESLAVE,0; read mode
rcallWakeSlave; gets slave attention
rcallRdDATA; receive one data byte, leaves idle
movfEEDATA,W; get data
movwfPORTB; move received data to PORTB
xorwfEEADDR,W; compare data with address
bz GoodData; branch if DATA = ADDR
rcallErrorloop; DATA is wrong, indicate error
39500 18C Reference Manual.book Page 8 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-9
Source Code
Source Code
GoodDataincfEEADDR,F; Point to next address
btfssEEADDR,7; at end of EEPROM?
gotoRdEEPROM; no, read more data
gotoMain; do it all over again
;************************************************************
; TX LED flashes to indicate error while displaying received data.
Errorloop
rcallDelay
btg PORTB,7; Toggle TX LED
rcallDelay
btg PORTB,7; Toggle TX LED
rcallDelay
btg PORTB,7; Toggle TX LED
rcallDelay
btg PORTB,7; Toggle TX LED
rcallDelay
btg PORTB,7; Toggle TX LED
rcallDelay
btg PORTB,7; Toggle sTX LED
return
;************************************************************
; sends start bit, slave address
; if ACK not recieved, sends restart, tries again
; execution can get stuck in this loop if slave not present
; can be used to poll slave status (retries until slave responds)
WakeSlave
bsf SSPCON2,SEN; Send start bit
btfscSSPCON2,SEN; Has SEN cleared yet?
goto$-2 ; No, loop back to test.
rWakeSlave
bcf PIR1,SSPIF; clear interrupt flag
nop
movfEESLAVE,W
movwfSSPBUF; move slave address to SSPBUF
btfssPIR1,SSPIF; has SSP completed sending SLAVE Address?
goto$-2 ; no, loop back to test
btfssSSPCON2,ACKSTAT; was ACK received from slave?
return ; yes, return to calling routine
bsf SSPCON2,RSEN; send repeated start bit
39500 18C Reference Manual.book Page 9 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-10
PIC18C Reference Manual
2000 Microchip Technology Inc.
btfscSSPCON2,RSEN; has repeated start been sent yet?
goto$-2 ; no, loop back to test
bra rWakeSlave; send slave address again
;************************************************************
; writes EEPROM memory address, hangs if no ACK
WrADDR
bcf PIR1,SSPIF; clear interrupt flag
movffEEADDR,SSPBUF; move EEPROM address to SSPBUF
btfssPIR1,SSPIF; has SSP completed sending EEPROM Address?
goto$-2 ; no, loop back to test
btfscSSPCON2,ACKSTAT; has slave sent ACK?
goto$-2 ; no, try again
return
;************************************************************
; Sends one byte of data to slave, hangs if no ACK
WrDATA
bcf PIR1,SSPIF; clear interrupt flag
movffEEDATA,SSPBUF; move data to SSPBUF
btfssPIR1,SSPIF; has SSP completed sending data to EEPROM?
goto$-2 ; no, loop back to test
btfscSSPCON2,ACKSTAT; has slave sent ACK?
goto$-2 ; no, try again
return
;************************************************************
; receive one byte from slave
; do not send ACK, send stop bit instead
RdDATA
bcf PIR1,SSPIF; clear interrupt flag
bsf SSPCON2,RCEN; enable receive mode
btfssPIR1,SSPIF; has SSP received a data byte?
goto$-2 ; no, loop back to test
bsf SSPCON2,ACKDT; no ACK
39500 18C Reference Manual.book Page 10 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-11
Source Code
Source Code
bsf SSPCON2,ACKEN; send ACKDT bit
btfscSSPCON2,ACKEN; has ACKDT bit been sent yet?
goto$-2 ; no, loop back to test
bsf SSPCON2,PEN; send stop bit
btfscSSPCON2,PEN; has stop bit been sent?
goto$-2 ; no, loop back to test
movffSSPBUF,EEDATA; save data to RAM
bcf SSPCON2,RCEN; disable receive mode
return
;************************************************************
; Sends stop bit, waits until sent
Stop
bsf SSPCON2,PEN; send stop bit
btfscSSPCON2,PEN; has stop bit been sent?
goto$-2 ; no, loop back to test
return
;************************************************************
; a delay of 98.57mS
Delay
movlw0x80
movwfDelayCtr2; preset
clrfDelayCtr1; clear counter
Delay1
decfszDelayCtr1; decrement counter
bra Delay1; back to top of loop
decfszDelayCtr2; decrement counter
bra Delay1; back to top of loop
return
END
39500 18C Reference Manual.book Page 11 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-12
PIC18C Reference Manual
2000 Microchip Technology Inc.
;
; Software License Agreement
;
; The software supplied herewith by Microchip Technology Incorporated
; (the “Company”) for its PICmicro® Microcontroller is intended and
; supplied to you, the Company’s customer, for use solely and
; exclusively on Microchip PICmicro Microcontroller products. The
; software is owned by the Company and/or its supplier, and is
; protected under applicable copyright laws. All rights are reserved.
; Any use in violation of the foregoing restrictions may subject the
; user to criminal sanctions under applicable laws, as well as to
; civil liability for the breach of the terms and conditions of this
; license.
;
; THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
; WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
; TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
; PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
; IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
; CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
;
;************************************************************
; PIC18CXX2 EXAMPLE CODE FOR PICDEM-2
;
; TITLE: Interrupt Priority Demonstration
; FILENAME: intrp_ex .asm
; REVISION HISTORY: A 5/13/00 jb format change
; HARDWARE: PICDEM-2 board
; FREQUENCY: 4MHz
:
;************************************************************
; This program uses Timer1 and Timer3 to demonstrate the use of
; interrupt priority.
;
; Timer1 is configured for high-priority interrupts
; and Timer3 is configured for low-priority interrupts. By writing
; to the PORTB LEDS, it is shown that a high-priority interrupts
; override low-priority interrupts.
list p=18c452, n=48, t=ON, st=OFF
#include "p18c452.inc"
;------------------BIT DEFINITIONS------------------------------------
F EQU 0x0001
;------------------VECTORS--------------------------------------------
39500 18C Reference Manual.book Page 12 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-13
Source Code
Source Code
org 0x000000; reset vector
bra START
org 0x000008; high priority interrupt vector
bra TMR1_ISR
org 0x000018; low priority interrupt vector
bra TMR3_ISR
;--------------------PROGRAM-----------------------------------
START
rcall INIT
;Set up priority interrupts.
bsf RCON,IPEN;enable priority interrupts.
bsf IPR1,TMR1IP;set Timer1 as a high priority interrupt source
bcf IPR2,TMR3IP;set Timer3 as a low priority interrupt source
bcf PIR1,TMR1IF;clear the Timer1 interrupt flag
bcf PIR2,TMR3IF;clear the Timer3 interrupt flag
bsf PIE1,TMR1IE;enable Timer1 interrupts
bsf PIE2,TMR3IE;enable Timer3 interrupts
bsf INTCON,GIEH;set the global interrupt enable bits
bsf INTCON,GIEL;"
;Timer1 setup
clrfT1CON
clrfTMR1H;clear Timer1 high
clrfTMR1L;clear Timer1 low
bsf T1CON,TMR1ON;turn on Timer1
;Timer3 setup
clrfT3CON
movlw0xF0
movwfTMR3H;write 0xf000 to Timer3
clrfTMR3L
bsf T3CON,TMR3ON;turn on Timer3
MLOOP
gotoMLOOP
;-------------------------------SUBROUTINES---------------------------------
TMR1_ISR ; high priority isr
bcf PIR1,TMR1IF;Clear the Timer1 interrupt flag.
bcf PORTB,0;Turn off PORTB<0> to indicate high priority
39500 18C Reference Manual.book Page 13 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-14
PIC18C Reference Manual
2000 Microchip Technology Inc.
; interrupt has overridden low priority.
bsf PORTB,7;Turn on PORTB<7> to indicate high priority
; interrupt is occuring.
T1POLL
btfssPIR1,TMR1IF;Poll TMR11 interrupt flag to wait for another
; TMR1 overflow.
bra T1POLL
bcf PIR1,TMR1IF;Clear the Timer1 interrupt flag again.
bcf PORTB,7;Turn off PORTB<7> to indicate the
; high-priority ISR is over.
retfie
TMR3_ISR ;low priority isr
bcf PIR2,TMR3IF;Clear the TMR3 interrupt flag.
movlw0xF0;Load TMR3 with the value 0xF000
movwfTMR3H
clrfTMR3L
bsf PORTB,0;Turn on PORTB<0> to indicate low priority
; interrupt is occurring.
T3POLL
btfssPIR2,TMR3IF;Poll TMR3 interrupt flag to wait for another TMR3 overflow.
bra T3POLL
movlw0xF0;Load TMR3 with the value 0xF000 again.
movwfTMR3H
clrfTMR3L
bcf PIR2,TMR3IF;Clear the Timer3 interrupt flag again.
bcf PORTB,0;Turn off PORTB<0> to indicate the low-priority ISR is over.
retfie
INIT
clrfPORTB; setup portb for outputs
clrfDDRB
return
END
39500 18C Reference Manual.book Page 14 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-15
Source Code
Source Code
;
; Software License Agreement
;
; The software supplied herewith by Microchip Technology Incorporated
; (the “Company”) for its PICmicro® Microcontroller is intended and
; supplied to you, the Company’s customer, for use solely and
; exclusively on Microchip PICmicro Microcontroller products. The
; software is owned by the Company and/or its supplier, and is
; protected under applicable copyright laws. All rights are reserved.
; Any use in violation of the foregoing restrictions may subject the
; user to criminal sanctions under applicable laws, as well as to
; civil liability for the breach of the terms and conditions of this
; license.
;
; THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
; WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
; TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
; PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
; IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
; CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
;
;************************************************************
; PIC18CXX2 EXAMPLE CODE FOR PICDEM-2
;
; TITLE: Oscillator Switching Demonstration
; FILENAME: osc.asm
; REVISION HISTORY: A 5/13/00 jb format change
; HARDWARE: PICDEM-2 board
; FREQUENCY: 4MHz
:
;************************************************************
; This program demonstrates the use of oscillator switching.
;
; The data held in MYDAT is periodically flashed on the PORTB
; LEDs. Each time a keypress is detected on RA4, the data is
; incremented and the oscillator source is changed.
list p=18c452, n=48, t=ON, st=OFF
#include "p18c452.inc"
KEY EQU 4
;-------------------18C452 RAM LOCATIONS------------------------------
COUNT0EQU 0x0000 ; used for software timing loop
COUNT1EQU 0x0001 ; "
39500 18C Reference Manual.book Page 15 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-16
PIC18C Reference Manual
2000 Microchip Technology Inc.
MYDAT EQU 0x0002 ; data storage register
;------------------BIT DEFINITIONS------------------------------------
F EQU 0x0001
;------------------VECTORS--------------------------------------------
ORG 0x000000; reset vector
BRA START
;--------------------PROGRAM-----------------------------------
START
rcall INIT; setup ports, etc.
bsf T1CON, T1OSCEN; setup the LP oscillator
MLOOP
btfss PORTA,KEY
rcall KEYPRESS; call keypress routine if
; button is pressed
movff MYDAT,PORTB; move data to portb
rcall WAIT; wait a while
clrf PORTB; clear the port
rcall WAIT; wait a while
bra MLOOP
;-------------------------------SUBROUTINES---------------------------------
KEYPRESS
btfss PORTA,KEY
bra KEYPRESS
incf MYDAT
; Oscillator source changes every time the subroutine is called.
btg OSCCON,SCS
return
INIT
clrf PORTA
clrf PORTB
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2000 Microchip Technology Inc. DS39540A-page 36-17
Source Code
Source Code
bsf DDRA,4
clrf DDRB
return
WAIT ; software time delay
clrf COUNT0
movlw 0x08
movwf COUNT1
WLOOP
decfsz COUNT0,F
bra WLOOP
decfsz COUNT1,F
bra WLOOP
return
end
39500 18C Reference Manual.book Page 17 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-18
PIC18C Reference Manual
2000 Microchip Technology Inc.
;
; Software License Agreement
;
; The software supplied herewith by Microchip Technology Incorporated
; (the “Company”) for its PICmicro® Microcontroller is intended and
; supplied to you, the Company’s customer, for use solely and
; exclusively on Microchip PICmicro Microcontroller products. The
; software is owned by the Company and/or its supplier, and is
; protected under applicable copyright laws. All rights are reserved.
; Any use in violation of the foregoing restrictions may subject the
; user to criminal sanctions under applicable laws, as well as to
; civil liability for the breach of the terms and conditions of this
; license.
;
; THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
; WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
; TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
; PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
; IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
; CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
;
;************************************************************
; PIC18CXX2 EXAMPLE CODE FOR PICDEM-2
;
; TITLE: Pulse Width Modulation Demonstration
; FILENAME: pwm_ex .asm
; REVISION HISTORY: A 5/13/00 jb format change
; HARDWARE: PICDEM-2 board
; FREQUENCY: 4MHz
:
;************************************************************
; This program demonstrates pulse width modulation using CCP2.
;
; The PWM period is fixed and then the duty cycle is varied by
; looking up a new value in a table. When the final value of
; the table is read, the table is read in reverse. The PWM output
; is set to RC1. Parts Y3, C6 & C7 are are not installed the
; on the PICDEM 2 board. PWM signal can be observed on RC1 pin.
;
list p=18c452, n=48, t=ON, st=OFF
#include "p18c452.inc"
;************************************************************
; bit definitions
F EQU 0x0001
39500 18C Reference Manual.book Page 18 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-19
Source Code
Source Code
;************************************************************
; 18C452 RAM LOCATIONS
DIRFLAG EQU 0x0000
;************************************************************
; 18C452 ROM LOCATIONS
TABLADDR EQU 0x0003000
;************************************************************
; vectors
org 0x000000; reset vector
bra START
org 0x000008; high priority interrupt vector
bra TMR1_ISR
;************************************************************
; program
START
; Set up PWM module
; Set PWM period by writing to PR2
; Set PWM duty cycle by writing to the CCPR2L register
; and the CCP2CON<5:4>>bits
; Make the CCP2 pin an output by clearing the TRISC<2> bit.
clrfCCP2CON;CCP module is off
bsf CCP2CON, CCP2M3;select PWM mode
bsf CCP2CON, CCP2M2;select PWM mode
movlw0x3F;Set PWM frequency to 78.12kHz
movwfPR2;
bcf TRISC, 1;make channel 1 an output
movlw0x00
movwfCCPR2L
;Set the TMR2 prescale value and enable Timer2 by writing to T2CON
;Configure the CCP2 module for PWM operation
clrfT2CON;clear T2CON
clrfTMR2;clear Timer2
bsf T2CON,TMR2ON;turn on Timer2
;initialize direction flag for table
clrfDIRFLAG
; Initialize the table pointer registers
39500 18C Reference Manual.book Page 19 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-20
PIC18C Reference Manual
2000 Microchip Technology Inc.
; to the first location of the data stored in program memory.
movlwUPPER(TABLADDR)
movwfTBLPTRU
movlwHIGH(TABLADDR)
movwfTBLPTRH
movlwLOW(TABLADDR)
movwfTBLPTRL
;setup interrupt
bsf RCON,IPEN;enable priority interrupts.
bsf IPR1,TMR1IP;set Timer1 as a high priority interrupt source
bcf PIR1,TMR1IF;clear the Timer1 interrupt flag
bsf PIE1,TMR1IE;enable Timer1 interrupts
bsf INTCON,GIEH;set the global interrupt enable bits
bsf INTCON,GIEL;"
;Timer1 setup
clrfT1CON
clrfTMR1H;clear Timer1 high
clrfTMR1L;clear Timer1 low
bsf T1CON,TMR1ON;turn on Timer1
MLOOP
gotoMLOOP
;************************************************************
; subroutines
TMR1_ISR ; high priority isr
bcf PIR1,TMR1IF;Clear the Timer1 interrupt flag.
rcall CHECK_ADDR
btfsc DIRFLAG,0
bra RD_DOWN
RD_UP
; Code here does a table read, post-increments, and writes the
; value to the CCPR2L PWM duty-cycle register.
tblrd*+
movffTABLAT,CCPR2L
39500 18C Reference Manual.book Page 20 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-21
Source Code
Source Code
bra T1POLL
RD_DOWN
; Code here does a table read, post-decrements, and writes the
; value to the CCPR2L PWM duty-cycle register.
tblrd*-
movffTABLAT,CCPR2L
bra T1POLL
T1POLL
btfssPIR1,TMR1IF;Poll TMR11 interrupt flag to wait for another
; TMR1 overflow.
bra T1POLL
bcf PIR1,TMR1IF;Clear the Timer1 interrupt flag again.
retfie
CHECK_ADDR
movlw LOW(TABEND) - 1
subwf TBLPTRL,W
bnz CHECK_LOW
setf DIRFLAG
return
CHECK_LOW
movlw LOW(TABLADDR)
subwf TBLPTRL,W
bnz DONE_CHECK
clrf DIRFLAG
DONE_CHECK
return
;-------------------------------DATA---------------------------------------
org TABLADDR
DB 0x00,0x06,0x0C,0x12,0x18,0x1E,0x23,0x28
DB 0x2D,0x31,0x35,0x38,0x3A,0x3D,0x3E,0x3F
TABEND
END
39500 18C Reference Manual.book Page 21 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-22
PIC18C Reference Manual
2000 Microchip Technology Inc.
;
; Software License Agreement
;
; The software supplied herewith by Microchip Technology Incorporated
; (the “Company”) for its PICmicro® Microcontroller is intended and
; supplied to you, the Company’s customer, for use solely and
; exclusively on Microchip PICmicro Microcontroller products. The
; software is owned by the Company and/or its supplier, and is
; protected under applicable copyright laws. All rights are reserved.
; Any use in violation of the foregoing restrictions may subject the
; user to criminal sanctions under applicable laws, as well as to
; civil liability for the breach of the terms and conditions of this
; license.
;
; THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
; WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
; TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
; PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
; IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
; CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
;
;************************************************************
; PIC18CXX2 EXAMPLE CODE FOR PICDEM-2
;
; TITLE: Table Read Demonstration
; FILENAME: table.asm
; REVISION HISTORY: A 5/13/00 jb format change
; HARDWARE: PICDEM-2 board
; FREQUENCY: 4MHz
:
;************************************************************
; This program demonstrates the use of the TBLRD instruction
; to read program memory.
;
; A pre-defined sequence of data
; bytes is included in program memory. Each time the button
; on pin RA4 is pressed, the next byte of data is accessed
; and displayed on the PORTB LEDS. When the beginning or end of
; the data is reached, the direction of access is reversed.
list p=18c452, n=48, t=ON, st=OFF
#include "p18c452.inc"
;-------------------18C452 RAM LOCATIONS------------------------------
DIRFLAG EQU 0x0000
39500 18C Reference Manual.book Page 22 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-23
Source Code
Source Code
;-------------------18C452 ROM LOCATIONS------------------------------
TABLADDR EQU 0x0003000
;------------------BIT DEFINITIONS------------------------------------
KEY EQU 4
;------------------VECTORS--------------------------------------------
ORG 0x000000; rest vector
GOTOSTART
ORG 0x000008; high priority interrupt vector
GOTOSTART
ORG 0x000018; low priority interrupt vector
GOTOSTART
;--------------------PROGRAM-----------------------------------
START
bsfDDRA,4; porta button input
clrf PORTB; setup portb for outputs
clrf DDRB
clrf DIRFLAG
; Code should be written here to intialize the table pointer registers
; to the first location of the data stored in program memory. Use
; the appropriate assembler directives to accomplish this.
; (Refer to the 'DATA' statements in this source code.)
movlwUPPER(TABLADDR)
movwfTBLPTRU
movlwHIGH(TABLADDR)
movwfTBLPTRH
movlwLOW(TABLADDR)
movwfTBLPTRL
MLOOP
btfsc PORTA,KEY; keypress routine
bra $ - 2; decrenment PC by 2 because
39500 18C Reference Manual.book Page 23 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-24
PIC18C Reference Manual
2000 Microchip Technology Inc.
btfss PORTA,KEY; of byte addressing!
bra $ - 2
rcall CHECK_ADDR
btfsc DIRFLAG,0
bra RD_DOWN
RD_UP
; Code here does a table read, post-increments, and writes the
; value to the PORTB LEDS
tblrd*+
movff TABLAT,PORTB
bra MLOOP
RD_DOWN
; Code here does a table read, post-decrements, and writes the
; value to the PORTB LEDS
tblrd*-
movff TABLAT,PORTB
bra MLOOP
;-----------------------------SUBROUTINES--------------------------
CHECK_ADDR
movlw LOW(TABEND) - 1
subwf TBLPTRL,W
bnz CHECK_LOW
setf DIRFLAG
return
CHECK_LOW
movlw LOW(TABLADDR)
subwf TBLPTRL,W
bnz DONE_CHECK
clrf DIRFLAG
DONE_CHECK
return
;-------------------------------DATA---------------------------------------
39500 18C Reference Manual.book Page 24 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-25
Source Code
Source Code
org TABLADDR
DATA 0x0201,0x0804,0x2010,0x8040 ; 0x003000 - 0x003007
DATA 0x4281,0x1824,0x2400,0x8142 ; 0x003008 - 0x00300F
DATA 0x1211,0x1814,0x2818,0x8848 ; 0x003010 - 0x003017
DATA 0xaa55,0xaa55,0x0100,0x0703 ; 0x003018 - 0x00301F
DATA 0x1F0F,0x7F3F,0xFFFF,0xFFFF ; 0x003020 - 0x003027
TABEND
END
39500 18C Reference Manual.book Page 25 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-26
PIC18C Reference Manual
2000 Microchip Technology Inc.
;
; Software License Agreement
;
; The software supplied herewith by Microchip Technology Incorporated
; (the “Company”) for its PICmicro® Microcontroller is intended and
; supplied to you, the Company’s customer, for use solely and
; exclusively on Microchip PICmicro Microcontroller products. The
; software is owned by the Company and/or its supplier, and is
; protected under applicable copyright laws. All rights are reserved.
; Any use in violation of the foregoing restrictions may subject the
; user to criminal sanctions under applicable laws, as well as to
; civil liability for the breach of the terms and conditions of this
; license.
;
; THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
; WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
; TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
; PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
; IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
; CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
;
;************************************************************
; PIC18CXX2 EXAMPLE CODE FOR PICDEM-2
;
; TITLE: Timer Read/Write Demonstration
; FILENAME: tmrrw.asm
; REVISION HISTORY: A 5/13/00 jb format change
; HARDWARE: PICDEM-2 board
; FREQUENCY: 4MHz
:
;************************************************************
; This program uses Timer1 and Timer3 to demonstrate the use of
; 8 and 16 bit write modes.
;
; The counters are used to maintain
; overflow count registers (similar to a RTCC). The 16 bit write to
; Timer3 will introduce an error between the overflow registers.
; This error is calculated in the main program loop and displayed on
; the PORTB LEDS.
list p=18c452, n=48, t=ON, st=OFF
#include "p18c452.inc"
;-------------------18C452 RAM LOCATIONS------------------------------
T1COUNT EQU 0x0000
T3COUNT EQU 0x0001
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2000 Microchip Technology Inc. DS39540A-page 36-27
Source Code
Source Code
;------------------BIT DEFINITIONS------------------------------------
F EQU 0x0001
;------------------VECTORS--------------------------------------------
org 0x000000; reset vector
bra START
org 0x000008; high priority interrupt vector
bra TMR_ISR
org 0x000018; low priority interrupt vector
bra START
;--------------------PROGRAM-----------------------------------
START
rcallINIT
; Setup Timer1
clrf T1CON
bsf T1CON,T1CKPS1; set prescaler 1:8
bsf T1CON,T1CKPS0; set prescaler 1:8
bsf T1CON,RD16; enable 16 bit read/write mode
movlw 0x80; initialize TMR1 with 8000
movwf TMR1H;
clrf TMR1L;
bsf T1CON,TMR1ON; turn on TMR1
; Setup Timer3
clrf T3CON
bsf T3CON,TMR3CS
bsf T3CON,RD16
bsf T3CON,T3CKPS1; set prescaler 1:8
bsf T3CON,T3CKPS0; set prescaler 1:8
bcf T3CON,RD16; enable 8 bit read/write mode
movlw 0x80; initialize TMR3 with 8000
movwf TMR3H
clrf TMR3L
bsf T3CON,TMR3ON
39500 18C Reference Manual.book Page 27 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-28
PIC18C Reference Manual
2000 Microchip Technology Inc.
MLOOP
; Subtract T3COUNT from T1COUNT
; and write the result to PORTB LEDS.
movf T3COUNT,W
subwf T1COUNT,W
movwf PORTB
bra MLOOP
;-------------------------------SUBROUTINES---------------------------------
TMR_ISR
btfsc PIR1,TMR1IF; check which timer caused the interrupt
bra T1_HANDLER
btfsc PIR2,TMR3IF
bra T3_HANDLER
retfie
T1_HANDLER
; Load Timer1 with 0x8000 by writing to the high byte only.
; Increment the T1COUNT register.
; Clear the Timer1 interrupt flag.
movlw 0x80
movwf TMR1H
incf T1COUNT
bcf PIR1,TMR1IF
retfie
T3_HANDLER
; Load Timer3 with 0x8000 by performing a 16-bit timer write.
; Increment the T3COUNT register.
; Clear the Timer3 interrupt flag.
movlw 0x80
movwf TMR3H
clrf TMR3L
incf T3COUNT
39500 18C Reference Manual.book Page 28 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-29
Source Code
Source Code
bcf PIR2,TMR3IF
retfie
;-----------------------------SUBROUTINES----------------------------------
INIT
clrf T1COUNT
clrf T3COUNT
bsf DDRA,4; porta
clrf PORTB; setup portb for outputs
clrf DDRB
bsf PIE1,TMR1IE; enable interrupts
bsf PIE2,TMR3IE
bsf INTCON,PEIE; enable peripheral interrupts
bsf INTCON,GIE; enable global interrupts
return
END
39500 18C Reference Manual.book Page 29 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-30
PIC18C Reference Manual
2000 Microchip Technology Inc.
;
; Software License Agreement
;
; The software supplied herewith by Microchip Technology Incorporated
; (the “Company”) for its PICmicro® Microcontroller is intended and
; supplied to you, the Company’s customer, for use solely and
; exclusively on Microchip PICmicro Microcontroller products. The
; software is owned by the Company and/or its supplier, and is
; protected under applicable copyright laws. All rights are reserved.
; Any use in violation of the foregoing restrictions may subject the
; user to criminal sanctions under applicable laws, as well as to
; civil liability for the breach of the terms and conditions of this
; license.
;
; THIS SOFTWARE IS PROVIDED IN AN “AS IS” CONDITION. NO WARRANTIES,
; WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT NOT LIMITED
; TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
; PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. THE COMPANY SHALL NOT,
; IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL OR
; CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
;
;************************************************************
; PIC18CXX2 EXAMPLE CODE FOR PICDEM-2
;
; TITLE: A/D Converter Demonstration
; FILENAME: a2d.asm
; REVISION HISTORY: A 5/13/00 jb format change
; HARDWARE: PICDEM-2 board
; FREQUENCY: 4MHz
:
;************************************************************
; This program is a simple implementation of the
; PIC18C452's A/D.
;
; One Channel is selected (AN0).
; The hardware for this program is the PICDEM-2 board. The program
; converts the potentiometer value on RA0 and displays it as
; an 8 bit binary value on Port B.
;
; The A/D is configured as follows:
; Vref = +5V internal
; A/D Osc. = internal RC
; A/D Channel = AN0 (RA0)
LIST P=18C452
#include ; File contains addresses for register and bit names
39500 18C Reference Manual.book Page 30 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39540A-page 36-31
Source Code
Source Code
;************************************************************
; reset and interrupt vectors
org 0x00000; Reset Vector Address
gotoStart
org 0x00008; Interrupt Vector Address
gotoISR ; goto Interrupt Service Routine
;************************************************************
; program code starts here
org 0x00020
Start
clrfPORTB; clear all bits of PORTB
clrfTRISB; Set PORTB as outputs
callInitializeAD ; configure A/D module
callSetupDelay; delay for 15 instruction cycles
bsf ADCON0,GO; Start first A/D conversion
MaingotoMain; do nothing loop
;************************************************************
; Service A/D interrupt
; Get value and display on LEDs
ISR
; Save context (WREG and STATUS) if required.
btfssPIR1,ADIF; Did A/D cause interrupt?
gotoOtherInt; No, check other sources
movfADRESH,W; Get A/D value
movwfLATB; Display on LEDs
bcf PIR1,ADIF; Reset A/D int flag
callSetupDelay; Delay for 15 cycles
bsf ADCON0,GO; Start A/D conversion
gotoEndISR; return from ISR
OtherInt
; This would be replaced by code to check and service other interrupt sources
39500 18C Reference Manual.book Page 31 Monday, July 10, 2000 6:12 PM
DS39540A-page 36-32
PIC18C Reference Manual
2000 Microchip Technology Inc.
goto$ ; trap here, loops to self
EndISR
; Restore context if saved.
retfie; Return, enables GIE
;************************************************************
; InitializeAD - initializes and sets up the A/D hardware.
; Select AN0 to AN3 as analog inputs, RC clock, and read AN0.
InitializeAD
movlwB'00000100'; Make RA0,RA1,RA4 analog inputs
movwfADCON1
movlwB'11000001'; Select RC osc, AN0 selected,
movwfADCON0; A/D enabled
bcf PIR1,ADIF; Clear A/D interrupt flag
bsf PIE1,ADIE; Enable A/D interrupt
bsf INTCON,PEIE; Enable peripheral interrupts
bsf INTCON,GIE; Enable Global interrupts
return
;************************************************************
; This is used to allow the A/D time to sample the input
; (acquisition time).
;
; This routine requires 11 cycles to complete.
; The call and return add another 4 cycles.
;
; 15 cycles with Fosc=4MHz means this delay consumes 15us.
SetupDelay
movlw.3 ; Load Temp with decimal 3
movwfTEMP
SD
decfszTEMP, F; Delay loop
gotoSD
return
END
39500 18C Reference Manual.book Page 32 Monday, July 10, 2000 6:12 PM
2000 Microchip Technology Inc. DS39539A-page 1
PIC18C Reference Manual
Index
Index
A
A/D
Accuracy/Error ............................................25-17, 26-17
ADCON0 Register...........................................25-2, 26-2
ADCON1 Register.................................................... 25-6
ADIF bit...........................................................25-7, 26-7
Analog Input Model Block Diagram.................25-9, 26-9
Configuring Analog Port Pins......................25-11, 26-11
Configuring the Interrupt .................................25-7, 26-7
Configuring the Module...................................25-7, 26-7
Connection Considerations.........................25-18, 26-18
Conversion Clock........................................25-10, 26-10
Conversions................................................25-12, 26-12
Converter Characteristics ......................................32-36
converter characteristics........................................32-14
Delays.............................................................25-9, 26-9
Effects of a Reset...............................25-16, 26-16, 27-6
Equations........................................................25-8, 26-8
Flowchart of A/D Operation.........................25-13, 26-13
GO/DONE bit ..................................................25-7, 26-7
Internal Sampling Switch (Rss) Impedence ....25-8, 26-8
Operation During Sleep .....................25-16, 26-16, 27-6
Sampling Requirements..................................25-8, 26-8
Sampling Time ................................................25-8, 26-8
Source Impedence..........................................25-8, 26-8
Time Delays....................................................25-9, 26-9
Transfer Function........................................25-18, 26-18
ACK................................................................................20-19
Acknowledge Pulse........................................................20-19
ADDLW Instruction ........................................................31-14
ADDWF Instruction .............................................31-16, 31-20
ADRES Register .....................................................25-2, 26-2
AKS ................................................................................20-37
ANDLW Instruction ........................................................31-22
ANDWF Instruction ..................... 31-24, 31-26, 31-30, 31-32,
...............................31-34, 31-36, 31-38, 31-40, 31-42, 31-48
Assembler ........................................................................34-6
B
Baud Rate Generator .....................................................20-30
BCF Instruction ..............................................................31-28
BF ................................................ 19-20, 20-19, 20-37, 20-40
Block Diagrams
Analog Input Model .........................................25-9, 26-9
Baud Rate Generator.............................................20-30
External Brown-out Protection Circuit (Case1) ........3-13
I
2C Master Mode....................................................20-27
I
2C Module .............................................................20-17
SSP (I2C Mode) .....................................................20-17
SSP (SPI Mode).......................................................20-9
SSP Module (I2C Master Mode) ..............................20-3
SSP Module (I2C Slave Mode) ................................ 20-3
SSP Module (SPI Mode).......................................... 20-2
Timer1......................................................................16-2
BODEN ............................................................................3-10
BRG ...............................................................................20-30
BRGH bit.......................................................................... 21-5
Brown-out Protection .......................................................3-13
BSF Instruction ...................................................31-44, 31-47
BTFSC Instruction..........................................................31-45
BTFSS Instruction ........................ 31-46, 31-56, 31-58, 31-60
Buffer Full bit, BF ...........................................................20-19
Bus Arbitration ...............................................................20-48
Bus Collision ..................................................................20-48
Bus Collision During a RESTART Condition..................20-51
Bus Collision During a Start Condition........................... 20-49
Bus Collision During a Stop Condition........................... 20-52
C
C ........................................................................................ 8-3
C Compiler (MP-C) .......................................................... 34-6
CALL Instruction ............................................................ 31-50
Clock/Instruction Cycle (Figure)......................................... 4-5
Clocking Scheme/Instruction Cycle ................................... 4-5
CLRF Instruction............................................... 31-52, 31-114
CLRWDT Instruction...................................................... 31-53
Code Examples
Loading the SSPBUF register ...................... 19-9, 20-10
Code Protection ............................................................. 29-10
COMF Instruction........................................................... 31-54
D
DC ..................................................................................... 8-3
DC Characteristics
PIC16C73 ................................................................ 32-6
PIC16C74 ................................................................ 32-6
DECF Instruction ................................................ 31-62, 31-64
DECFSZ Instruction............................................31-66, 31-68
Development Support...................................................... 34-2
F
Filter/Mask Truth Table.................................................. 22-54
Flowcharts
Acknowledge ......................................................... 20-44
Master Receiver .................................................... 20-41
Master Transmit..................................................... 20-38
Restart Condition................................................... 20-35
Start Condition....................................................... 20-32
Stop Condition ....................................................... 20-46
FS0 .................................................................................... 8-3
FS1 .................................................................................... 8-3
FS2 .................................................................................... 8-3
FS3 .................................................................................... 8-3
G
General Call Address Sequence ................................... 20-25
General Call Address Support....................................... 20-25
GOTO Instruction........................................................... 31-70
I
I
2C ................................................................................. 20-17
BF.......................................................................... 19-20
CKP ....................................................................... 19-24
I
2C Overview ........................................................... 36-1
Initiating and Terminating Data Transfer ................. 36-2
START..................................................................... 36-2
STOP....................................................................... 36-2
I
2C Master Mode Receiver Flowchart............................ 20-41
I
2C Master Mode Reception .......................................... 20-40
I
2C Master Mode Restart Condition............................... 20-33
I
2C Mode Selection........................................................ 20-18
I
2C Module
10-bit Address mode ............................................. 20-20
Acknowledge Flowchart......................................... 20-44
Acknowledge Sequence timing ............................. 20-43
Addressing............................................................. 20-20
Baud Rate Generator ............................................ 20-30
Block Diagram ....................................................... 20-27
BRG Block Diagram .............................................. 20-30
BRG Reset due to SDA Collision .......................... 20-50
BRG Timing........................................................... 20-30
Bus Arbitration ....................................................... 20-48
Bus Collision.......................................................... 20-48
Acknowledge ................................................. 20-48
Restart Condition........................................... 20-51
Restart Condition Timing (Case1) ................. 20-51
39500 18C Reference ManualIX.fm Page 1 Tuesday, July 11, 2000 8:33 AM
PIC18C Reference Manual
DS39539A-page 2 2000 Microchip Technology Inc.
Restart Condition Timing (Case2)..................20-51
Start Condition ...............................................20-49
Start Condition Timing ........................20-49, 20-50
Stop Condition ...............................................20-52
Stop Condition Timing (Case1)......................20-52
Stop Condition Timing (Case2)......................20-52
Transmit Timing .............................................20-48
Bus Collision timing................................................20-48
Clock Arbitration.....................................................20-47
Clock Arbitration Timing (Master Transmit)............20-47
Conditions to not give ACK Pulse ..........................20-19
General Call Address Support ...............................20-25
Master Mode ..........................................................20-27
Master Mode 7-bit Reception timing ......................20-42
Master Mode Operation .........................................20-29
Master Mode Start Condition .................................20-31
Master Mode Transmission....................................20-37
Master Mode Transmit Sequence ..........................20-29
Master Transmit Flowchart ....................................20-38
Multi-Master Communication .................................20-48
Multi-master Mode .................................................20-28
Operation ...............................................................20-17
Repeat Start Condition timing ................................20-34
Restart Condition Flowchart...................................20-35
Slave Mode ............................................................20-19
Slave Reception .....................................................20-21
Slave Transmission................................................20-22
SSPBUF.................................................................20-18
Start Condition Flowchart.......................................20-32
Stop Condition Flowchart.......................................20-46
Stop Condition Receive or Transmit timing............20-45
Stop Condition timing .............................................20-45
Waveforms for 7-bit Reception ..............................20-22
Waveforms for 7-bit Transmission .........................20-22
I
2C Module Address Register, SSPADD........................20-18
I
2C Slave Mode ..............................................................20-19
INCF Instruction .............................................................31-72
INCFSZ Instruction..............................................31-74, 31-76
Instruction Flow/Pipelining .................................................4-6
Instruction Set
ADDLW ..................................................................31-14
ADDWF.......................................................31-16, 31-20
ANDLW ..................................................................31-22
ANDWF....................31-24, 31-26, 31-30, 31-32, 31-34,
.................................. 31-36, 31-38, 31-40, 31-42, 31-48
BCF ........................................................................31-28
BSF .............................................................31-44, 31-47
BTFSC ...................................................................31-45
BTFSS ................................. 31-46, 31-56, 31-58, 31-60
CALL ......................................................................31-50
CLRF.........................................................31-52, 31-114
CLRWDT................................................................31-53
COMF ....................................................................31-54
DECF ..........................................................31-62, 31-64
DECFSZ......................................................31-66, 31-68
GOTO ....................................................................31-70
INCF.......................................................................31-72
INCFSZ .......................................................31-74, 31-76
IORLW ...................................................................31-78
IORWF ...................................................................31-80
MOVLW .................... 31-82, 31-84, 31-86, 31-87, 31-88
MOVWF ...................31-89, 31-90, 31-91, 31-92, 31-94,
....................................................................31-95, 31-96
NOP ............................................................31-93, 31-98
RETFIE ................................................................31-100
RETLW ................................................................31-102
RETURN ..............................................................31-104
RLF .........................................................31-106, 31-108
RRF ........................................................ 31-110, 31-112
SLEEP ................................................................. 31-115
SUBLW................................................... 31-116, 31-118
SUBWF................................................... 31-120, 31-122
SWAPF......................................31-124, 31-126, 31-128
XORLW ............................................................... 31-132
XORWF ..................................................31-130, 31-134
Summary Table ................................................5-3, 31-6
Inter-Integrated Circuit (I2C) ............................................ 20-2
Internal Sampling Switch (Rss) Impedence............ 25-8, 26-8
Interrupts
Flag bits
TMR1IE ........................................................... 10-4
TMR1IF............................................................ 10-4
TMR2IE ........................................................... 10-4
TMR2IF............................................................ 10-4
TMR3IE ........................................................... 10-4
TMR3IF............................................................ 10-4
Logic ........................................................................ 10-4
Introduction...................................................................... 31-2
IORLW Instruction ......................................................... 31-78
IORWF Instruction ......................................................... 31-80
L
Loading of PC .................................................................... 7-7
M
MOVLW Instruction........... 31-82, 31-84, 31-86, 31-87, 31-88
MOVWF Instruction .....................31-89, 31-90, 31-91, 31-92,
.................................................................31-94, 31-95, 31-96
MPASM Assembler................................................. 34-2, 34-6
MP-C C Compiler............................................................. 34-6
MPSIM Software Simulator.............................................. 34-3
Multi-Master Communication......................................... 20-48
Multi-Master Mode ......................................................... 20-28
Multiply Examples
16 x 16 Routine ......................................................... 6-4
16 x 16 Signed Routine ............................................. 6-5
8 x 8 Routine ............................................................. 6-3
8 x 8 Signed Routine ................................................. 6-3
N
NOP Instruction .................................................. 31-93, 31-98
O
OSCCON........................................................................... 2-3
OSCCON Register............................................................. 2-3
Oscillator Start-up Time (Figure) ....................................... 3-5
OV...................................................................................... 8-3
P
PICDEM-1 Low-Cost PIC16/17 Demo Board .......34-2, 34-12
PICDEM-2 Low-Cost PIC16CXX Demo Board..... 34-2, 34-12
PICDEM-3 Low-Cost PIC16C9XXX Demo Board ......... 34-13
PICSTART‰ Low-Cost Development System..... 34-2, 34-10
Pin Functions
MCLR/VPP ................................................................. 4-9
OSC1/CLKIN ......................................................4-8, 4-9
OSC2/CLKOUT ..................................................4-8, 4-9
RA0/AN0.................................................................... 4-9
RA1/AN1.................................................................... 4-9
RA2/AN2.................................................................... 4-9
RA3/AN3/VREF........................................................... 4-9
RA4/T0CKI ................................................................ 4-9
RA5/AN4/SS.............................................................. 4-9
RB0/INT..................................................................... 4-9
RB1............................................................................ 4-9
RB2............................................................................ 4-9
RB3............................................................................ 4-9
RB4............................................................................ 4-9
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Index
RB5............................................................................ 4-9
RB6............................................................................ 4-9
RB7............................................................................ 4-9
RC0/T1OSO/T1CKI ................................................. 4-10
RC1/T1OSI/CCP2.................................................... 4-10
RC2/CCP1 ...............................................................4-10
RC3/SCK/SCL .........................................................4-10
RC4/SDI/SDA ..........................................................4-10
RC5/SDO .................................................................4-10
RC6/TX/CK ..............................................................4-10
RC7/RX/DT..............................................................4-10
RD0/PSP0................................................................ 4-10
RD1/PSP1................................................................ 4-10
RD2/PSP2................................................................ 4-10
RD3/PSP3................................................................ 4-10
RD4/PSP4................................................................ 4-10
RD5/PSP5................................................................ 4-10
RD6/PSP6................................................................ 4-10
RD7/PSP7................................................................ 4-10
RE0/RD/AN5..........................................4-10, 4-11, 4-12
RE1/WR/AN6.........................................4-10, 4-11, 4-12
RE2/CS/AN7 ..........................................4-10, 4-11, 4-12
VDD .......................................................................... 4-13
VSS...........................................................................4-13
PRO MATE‰ Universal Programmer...................34-2, 34-10
Program Verification ......................................................29-10
PSPMODE bit ..................................................................12-2
PWM (CCP Module)
Example Frequencies/Resolutions ........................17-13
R
R/W bit ..................................................................20-20, 36-4
R/W bit ...........................................................................20-21
Read-Modify-Write .........................................................11-37
Registers
SSPSTAT.................................................................20-4
T1CON
.........................................................................16-3
Diagram ........................................................... 16-3
Resets................................................................................3-4
RETFIE Instruction.......................................................31-100
RETLW Instruction.......................................................31-102
RETURN Instruction ....................................................31-104
RLF Instruction................................................31-106, 31-108
RRF Instruction ...............................................31-110, 31-112
S
SCK..................................................................................20-9
SCL ................................................................................20-19
SDA................................................................................20-19
SDI ...................................................................................20-9
SDO ................................................................................. 20-9
Serial Clock, SCK ............................................................20-9
Serial Clock, SCL ...........................................................20-19
Serial Data Address, SDA..............................................20-19
Serial Data In, SDI ........................................................... 20-9
Serial Data Out, SDO.......................................................20-9
SFR ................................................................................31-12
SFR As Source/Destination ...........................................31-12
Signed Math..................................................................... 5-10
Slave Select Synchronization ........................................20-13
Slave Select, SS ..............................................................20-9
SLEEP Instruction ........................................................31-115
Special Features of the CPU ..................................29-2, 30-2
Special Function Registers ............................................31-12
SPI
Master Mode ...............................................19-12, 20-12
Serial Clock.....................................................19-8, 20-9
Serial Data In.................................................. 19-8, 20-9
Serial Data Out............................................... 19-8, 20-9
Serial Peripheral Interface (SPI).............................. 20-2
Slave Select.................................................... 19-8, 20-9
SPI clock..................................................... 19-12, 20-12
SPI Mode................................................................. 20-9
SPI Master/Slave Connection........................................ 20-11
SPI Module
Master/Slave Connection ...................................... 20-11
Slave Mode............................................................ 20-13
Slave Select Synchronization................................ 20-13
Slave Synch Timnig............................................... 20-14
Slave Timing with CKE = 0.................................... 20-14
Slave Timing with CKE = 1.................................... 20-15
SS.................................................................................... 20-9
SSP ................................................................................. 20-2
Block Diagram (SPI Mode) ...................................... 20-9
SPI Mode................................................................. 20-9
SSPADD..........................................19-21, 20-18, 20-20
SSPBUF ...............................19-12, 19-24, 20-12, 20-18
SSPCON1 ............................................................... 20-6
SSPCON2 ............................................................... 20-8
SSPSR ............................................19-12, 20-12, 20-19
SSPSTAT ..................................................... 20-4, 20-18
SSP I2C
SSP I2C Operation ................................................ 20-17
SSP Module
SPI Master Mode................................................... 20-12
SPI Master./Slave Connection............................... 20-11
SPI Slave Mode..................................................... 20-13
SSPCON1 Register............................................... 20-18
SSP Overflow Detect bit, SSPOV.................................. 20-19
SSPBUF .............................................................20-18, 20-19
SSPCON1 ............................................................ 20-6, 20-18
SSPCON2 ....................................................................... 20-8
SSPIF ............................................................................ 20-21
SSPOV ............................................................... 20-19, 20-40
SSPSTAT ............................................................. 20-4, 20-18
SUBLW Instruction ......................................... 31-116, 31-118
SUBWF Instruction ......................................... 31-120, 31-122
SWAPF Instruction ............................31-124, 31-126, 31-128
Synchronous Serial Port.................................................. 20-2
T
TAD .....................................................................25-10, 26-10
Timer Modules
Timer1
Block Diagram ................................................. 16-2
Timers
Timer1
Capacitor Selection .............................. 14-10, 16-9
Timing Diagrams
A/D Conversion ..................................................... 32-37
Acknowledge Sequence Timing ............................ 20-43
Baud Rate Generator with Clock Arbitration.......... 20-30
BRG Reset Due to SDA Collision.......................... 20-50
Bus Collision
Start Condition Timing ................................... 20-49
Bus Collision During a Restart Condition (Case 1) 20-51
Bus Collision During a Restart Condition (Case2). 20-51
Bus Collision During a Start Condition (SCL = 0).. 20-50
Bus Collision During a Stop Condition................... 20-52
Bus Collision for Transmit and Acknowledge ........ 20-48
Capture/Compare/PWM ........................................ 32-24
External Clock Timing............................................ 32-19
I
2C Bus Data...............................................32-31, 32-33
I
2C Bus Start/Stop bits........................................... 32-30
I
2C Master Mode First Start bit timing ................... 20-31
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PIC18C Reference Manual
DS39539A-page 4 2000 Microchip Technology Inc.
I
2C Master Mode Reception timing ........................20-42
I
2C Master Mode Transmission timing...................20-39
Master Mode Transmit Clock Arbitration................20-47
Oscillator Start-up Time .............................................3-5
Parallel Slave Port .................................................32-25
Power-up Timer .....................................................32-22
Repeat Start Condition...........................................20-34
Reset......................................................................32-22
Slave Synchronization ...........................................20-14
SPI Mode Timing (Master Mode)SPI Mode
Master Mode Timing Diagram........................20-12
SPI Mode Timing (Slave Mode with CKE = 0) .......20-14
SPI Mode Timing (Slave Mode with CKE = 1) .......20-15
Start-up Timer ........................................................32-22
Stop Condition Receive or Transmit ......................20-45
USART RX Pin Sampling.......................................21-17
USART Synchronous Receive ...............................32-34
USART Synchronous Transmission ......................32-34
USART, Asynchronous Reception .........................21-16
Watchdog Timer.....................................................32-22
TRISC ............................................................................19-26
TRISC Register ..............................................................19-17
TRISD Register ...................................................11-27, 11-29
U
Universal Synchronous Asynchronous Receiver Transmitter
(USART)
Asynchronous Receiver
Setting Up Reception.....................................21-15
Timing Diagram..............................................21-16
USART
Asynchronous Transmitter .......................................21-9
Baud Rate Generator (BRG)
Sampling..........................................................21-5
W
Watchdog Timer (WDT) .................................................29-10
Waveform for General Call Address Sequence .............20-25
WCOL ............................... 20-31, 20-37, 20-40, 20-43, 20-45
WCOL Status Flag .........................................................20-31
X
XORLW Instruction ......................................................31-132
XORWF Instruction .........................................31-130, 31-134
Z
Z.........................................................................................8-3
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Index
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Index
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Index
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Index
NOTES:
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Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates.
It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by
Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights
arising from such use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with express written
approval by Microchip. No licenses are conveyed, implicitly or otherwise, except as maybe explicitly expressed herein, under any intellectual property
rights. The Microchip logo and name are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. All rights reserved. All other
trademarks mentioned herein are the property of their respective companies.
DS39500A 2000 Microchip Technology Inc.
All rights reserved. © 2000 Microchip Technology Incorporated. Printed in the USA. 7/00 Printed on recycled paper.
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39500 18C Reference Manual.book Page 33 Monday, July 10, 2000 6:12 PM
ATWINC15x0
ATWINC15x0 Wi-Fi® Network Controller Software Design
Guide
Introduction
Microchip’s SmartConnect ATWINC15x0 is an IEEE®
802.11 b/g/n network controller SoC for Internet of
Things (IoT) applications. It is an ideal add-on to the existing microcontroller (MCU) solutions bringing WiFi
and network capabilities through an SPI-to-Wi-Fi interface. The ATWINC15x0 connects to any
Microchip AVR®
or Microchip SMART™
MCU with minimal resource requirements.
Features
• Wi-Fi IEEE 802.11 b/g/n STA, and AP modes
• Wi-Fi Protected Setup (WPS)
• Support of WEP, WPA/WPA2 Personal, and WPA/WPA2 Enterprise Security
– EAP-TLS
– EAP-PEAPv0/1 with TLS
– EAP-TTLSv0 with MSCHAPv2
– EAP-PEAPv0/1 with MSCHAPv2
• Embedded network stack protocols to offload work from the MCU (minimize the host CPU
requirements). This allows the Wi-Fi Network Controller (WINC) to operate with a wide range of
MCUs including low-end MCUs.
• Embedded uIP TCP/IP stack with BSD-Style socket API
• Embedded network protocols
– DHCP client/server
– DNS resolver client
– SNTP client for UTC time synchronization
• Embedded TLS security abstracted behind BSD-style socket API
• HTTP server for provisioning over AP mode
• Ultra-low C IEEE 802.11 b/g/n RF/PH/MAC SoC
• Fast boot from On-Chip boot ROM
• 8 Mb (WINC1510) and 4 Mb (WINC1500) internal Flash memory with Over-the-Air (OTA) firmware
upgrade
• WINC1510 support Host File Download feature which can be used for host MCU over the air
firmware update
• Low-power consumption with different Power Save modes
• Low footprint host driver with the following capabilities:
– Can run on 8-, 16-, and 32-bit MCU using SPI interface
– Little- and big-endian support
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 1
Table of Contents
Introduction......................................................................................................................1
Features.......................................................................................................................... 1
1. Host Driver Architecture............................................................................................ 5
1.1. WLAN API.................................................................................................................................... 5
1.2. Socket API....................................................................................................................................5
1.3. Host Interface (HIF)......................................................................................................................6
1.4. Board Support Package (BSP).....................................................................................................6
1.5. Serial Bus Interface......................................................................................................................6
2. ATWINC15x0 System Architecture............................................................................7
2.1. Bus Interface................................................................................................................................ 7
2.2. Nonvolatile Storage......................................................................................................................8
2.3. CPU..............................................................................................................................................8
2.4. IEEE 802.11 MAC Hardware........................................................................................................8
2.5. Program Memory..........................................................................................................................8
2.6. Data Memory................................................................................................................................8
2.7. Shared Packet Memory................................................................................................................8
2.8. IEEE 802.11 MAC Firmware........................................................................................................ 8
2.9. Memory Manager......................................................................................................................... 8
2.10. Power Management..................................................................................................................... 9
2.11. WINC RTOS.................................................................................................................................9
2.12. WINC IoT Library..........................................................................................................................9
3. WINC Initialization and Simple Application..............................................................11
3.1. BSP Initialization.........................................................................................................................11
3.2. WINC Host Driver Initialization................................................................................................... 11
3.3. Socket Layer Initialization...........................................................................................................11
3.4. WINC Event Handling................................................................................................................ 12
3.5. Example Code............................................................................................................................13
4. ATWINC15x0 Configuration.....................................................................................14
4.1. Device Parameters.....................................................................................................................14
4.2. WINC Modes of Operation......................................................................................................... 14
4.3. Network Parameters...................................................................................................................16
4.4. Power Save Modes.................................................................................................................... 17
4.5. Configuring Listen Interval and DTIM Monitoring.......................................................................18
5. Wi-Fi Station Mode.................................................................................................. 20
5.1. Scan Configuration Parameters................................................................................................. 20
5.2. Wi-Fi Scan..................................................................................................................................20
5.3. Wi-Fi Security.............................................................................................................................21
5.4. On Demand Wi-Fi Connection................................................................................................... 22
ATWINC15x0
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 2
5.5. Default Connection.....................................................................................................................25
5.6. Encrypted Credential Storage.................................................................................................... 26
5.7. Simple Roaming.........................................................................................................................27
5.8. Multiple Gain Table.....................................................................................................................29
5.9. Host File Download.................................................................................................................... 30
6. Socket Programming............................................................................................... 39
6.1. Overview.................................................................................................................................... 39
6.2. Sockets API................................................................................................................................39
6.3. Socket Connection Flow.............................................................................................................47
6.4. Example Code............................................................................................................................51
7. Transport Layer Security (TLS)............................................................................... 56
7.1. TLS Overview.............................................................................................................................56
7.2. TLS Connection Establishment..................................................................................................56
7.3. Server Certificate Installation..................................................................................................... 58
7.4. WINC TLS Limitations................................................................................................................59
7.5. SSL Client Code Example..........................................................................................................60
8. Wi-Fi AP Mode........................................................................................................ 62
8.1. Overview.................................................................................................................................... 62
8.2. Setting the WINC AP Mode........................................................................................................62
8.3. Limitations.................................................................................................................................. 62
8.4. Sequence Diagram.....................................................................................................................62
8.5. AP Mode Code Example............................................................................................................63
9. Provisioning............................................................................................................. 65
9.1. HTTP Provisioning..................................................................................................................... 65
9.2. Limitations.................................................................................................................................. 68
9.3. Wi-Fi Protected Setup (WPS).....................................................................................................68
10. Over-The-Air Upgrade.............................................................................................71
10.1. Overview.................................................................................................................................... 71
10.2. OTA Image Architecture............................................................................................................. 71
10.3. OTA Download Sequence Diagram........................................................................................... 72
10.4. OTA Firmware Rollback............................................................................................................. 72
10.5. OTA Limitations..........................................................................................................................73
10.6. OTA Code Example....................................................................................................................73
11. Multicast Sockets.....................................................................................................74
11.1. Overview.................................................................................................................................... 74
11.2. How to Use Filters......................................................................................................................74
11.3. Multicast Socket Code Example.................................................................................................74
12. WINC Serial Flash Memory.....................................................................................78
12.1. Overview and Features.............................................................................................................. 78
12.2. Accessing to Serial Flash...........................................................................................................78
12.3. Read/Write/Erase Operations.................................................................................................... 78
ATWINC15x0
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 3
13. Host Interface (HIF) Protocol...................................................................................81
13.1. Transfer Sequence Between the HIF Layer and the WINC Firmware........................................82
13.2. HIF Message Header Structure..................................................................................................84
13.3. HIF Layer APIs...........................................................................................................................84
13.4. Scan Code Example...................................................................................................................85
14. WINC SPI Protocol..................................................................................................90
14.1. Introduction.................................................................................................................................90
14.2. Message Flow for Basic Transactions......................................................................................101
14.3. SPI Level Protocol Example.....................................................................................................105
15. Appendix A. How to Generate Certificates............................................................128
15.1. Introduction...............................................................................................................................128
15.2. Steps........................................................................................................................................ 128
15.3. Limitations................................................................................................................................ 128
16. Appendix B. X.509 Certificate Format and Conversion.........................................129
16.1. Introduction...............................................................................................................................129
16.2. Conversion Between Different Formats................................................................................... 129
17. References............................................................................................................ 131
18. Document Revision History................................................................................... 132
The Microchip Web Site.............................................................................................. 133
Customer Change Notification Service........................................................................133
Customer Support....................................................................................................... 133
Microchip Devices Code Protection Feature............................................................... 133
Legal Notice.................................................................................................................134
Trademarks................................................................................................................. 134
Quality Management System Certified by DNV...........................................................135
Worldwide Sales and Service......................................................................................136
ATWINC15x0
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 4
1. Host Driver Architecture
The following figure shows the architecture of the WINC host driver software, which runs on the host
MCU.
Figure 1-1. Host Driver Software Architecture
The ATWINC15x0 host driver software is a C library, which provides the host MCU application with
necessary APIs to perform necessary WLAN and socket operations. The components of the host driver
are described in the following sub-sections.
1.1 WLAN API
This module provides an interface to the application for all Wi-Fi operations and any non-IP related
operations.
This includes the following services:
• Wi-Fi STA management operations
– Wi-Fi scan
– Wi-Fi connection management (connect, disconnect, connection status, and so on)
– WPS activation/deactivation
• Wi-Fi AP enable/disable
• Wi-Fi power save control API
This interface is defined in the m2m_wifi.h file.
1.2 Socket API
This module provides the socket communication APIs that are mostly compliant with the well-known BSD
sockets to enable rapid application development. To comply with the nature of the MCU application
environment, there are differences in API prototypes and in usage of some APIs between the WINC
sockets and BSD sockets.
This interface is defined in the socket.h file.
ATWINC15x0
Host Driver Architecture
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 5
The detailed description of the socket operations is provided in Socket Programming.
1.3 Host Interface (HIF)
The HIF is responsible for handling the communication between the host driver and the WINC firmware.
This includes interrupt handling, DMA and HIF command/response management. The host driver
communicates with the firmware in the form of commands and responses formatted by the HIF layer.
The interface is defined in the m2m_hif.h file.
The detailed description of the HIF design is provided in Host Interface Protocol.
1.4 Board Support Package (BSP)
The Board Support Package abstracts the functionality of a specific host MCU platform. This allows the
driver to be portable to a wide range of hardware and hosts. Abstraction includes: pin assignment, power
on/off sequence, reset sequence and peripheral definitions (Push buttons, LEDs, and so on).
The minimum required BSP functionality is defined in the nm_bsp.h file.
1.5 Serial Bus Interface
The Serial Bus Interface module abstracts the hardware associated with implementing the bus between
the Host and the WINC. The serial bus interface abstracts I2C, SPI, or UART bus (Currently, host driver
supports only SPI bus interface). The basic bus access operations (Read and Write) are implemented in
this module as appropriate for the interface type and the specific hardware.
The bus interface APIs are defined in the nm_bus_wrapper.h file.
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2. ATWINC15x0 System Architecture
The following figure shows the ATWINC15x0 system architecture. In addition to its built-in Wi-Fi
IEEE-802.11 physical layer and RF front end, the WINC ASIC contains an embedded APS3S-Cortus 32-
bit CPU to run the WINC firmware. The firmware comprises the Wi-Fi IEEE-802.11 MAC layer and
embedded protocol stacks which offload the host MCU. The components of the system are described in
the following sub-sections.
Figure 2-1. ATWINC15x0 System Architecture
2.1 Bus Interface
Hardware logic for the supported bus types for the ATWINC15x0 communications.
Note: SPI is currently the bus interface supported by the Host Driver.
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2.2 Nonvolatile Storage
The ATWINC1510 has an integrated 8 Mb and the ATWINC1500 has an integrated 4 Mb serial Flash
inside the WINC package (SIP). This stores the WINC firmware image and can store a second image to
support OTA. It also stores information used by the WINC firmware in the run-time.
The detailed description of the serial Flash is provided in WINC Serial Flash Memory.
2.3 CPU
The SoC contains an APS3S-Cortus 32-bit CPU running at 40 MHz clock speed which executes the
embedded WINC firmware.
2.4 IEEE 802.11 MAC Hardware
The SoC contains a hardware accelerator to ensure fast and compliant implementation of the IEEE
802.11 MAC layer and associated timing. It offloads IEEE 802.11 MAC functionality from firmware to
improve performance and boost the MAC throughput. The accelerator includes hardware encryption/
decryption of Wi-Fi traffic and traffic filtering mechanisms to avoid unnecessary processing in software.
2.5 Program Memory
128 KB Instruction RAM is provided for execution of the ATWINC15x0 firmware code.
2.6 Data Memory
64 KB RAM is provided for the ATWINC15x0 firmware data storage.
2.7 Shared Packet Memory
128 KB memory is provided for TX/RX packet management. It is shared between the MAC hardware and
the CPU. This memory is managed by the Memory Manager SW component.
2.8 IEEE 802.11 MAC Firmware
The system supports IEEE 802.11 b/g/n Wi-Fi MAC including WEP and WPA/WPA2 security supplicant.
Between the MAC hardware and the firmware, a full range of IEEE 802.11 features are implemented and
supported including beacon generation and reception, control packet generation and reception, and
packet aggregation and de-aggregation.
2.9 Memory Manager
The memory manager is responsible for the allocation and de-allocation of memory chunks in both
shared packet memory and data memory.
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2.10 Power Management
The Power Management module is responsible for handling different Power Save modes supported by
the WINC and coordinating these modes with the Wi-Fi transceiver.
2.11 WINC RTOS
The firmware includes a low-footprint real-time scheduler which allows concurrent multi-tasking on the
ATWINC15x0 CPU. The ATWINC15x0 RTOS provides semaphores and timer functionality.
2.12 WINC IoT Library
The WINC IoT library provides a set of networking protocols in the WINC firmware. It offloads the host
MCU from networking and transport layer protocols. The following sections describe the components of
the WINC IoT library.
2.12.1 WINC TCP/IP STACK
The WINC TCP/IP is an IPv4.0 stack based on the uIP (pronounced micro IP) TCP/IP stack.
uIP is a low footprint TCP/IP stack which has the ability to run on a memory-constrained microcontroller
platform. It was originally developed by Adam Dunkels, licensed under a BSD style license, and further
developed by a wide group of developers. The WINC TCP/IP stack is a customized version of the original
uIP implementation which has several enhancements to boost TCP and UDP throughput.
2.12.2 DHCP CLIENT/SERVER
A DHCP client is embedded in the WINC firmware that can automatically obtain an IP configuration after
connecting to a Wi-Fi network.
The WINC firmware provides an instance of a DHCP server that automatically starts when the WINC AP
mode is enabled. When the host MCU application activates the AP mode, it is allowed to configure the
DHCP Server IP address pool range within the AP configuration parameters.
2.12.3 DNS RESOLVER
The WINC firmware contains an instance of an embedded DNS resolver. This module can return an IP
address by resolving the host domain names supplied with the socket API call gethostbyname.
2.12.4 SNTP
The SNTP (Simple Network Time Protocol) module implements an SNTP client used to synchronize the
WINC internal clock to the UTC clock.
2.12.5 Enterprise Security
The Enterprise Security module implements the following authentication protocols for establishing a Wi-Fi
connection with an AP by WPA/WPA2-Enterprise Security.
• EAP with TLS
• EAP-PEAPv0/v1 with MSCHAPV2
• EAP-TTLSv0 with MSCHAPv2
• EAP-PEAPv0/v1 with MSCHAPv2
2.12.6 TRANSPORT LAYER SECURITY
For TLS implementation, refer to Section 7 “Transport Layer Security (TLS)” for details.
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2.12.7 WI-FI PROTECTED SETUP
For WPS protocol implementation, refer to Section 10.3 “Wi-Fi Protected Setup (WPS)” for details.
2.12.8 CRYPTO LIBRARY
The Crypto Library contains a set of cryptographic algorithms used by the common security protocols.
This library has an implementation of the following algorithms:
• MD4 Hash algorithm (used only for MsChapv2.0 digest calculation)
• MD5 Hash algorithm
• SHA-1 Hash algorithm
• SHA-256 Hash algorithm
• DES Encryption (used only for MsChapv2.0 digest calculation)
• MS-CHAPv2.0 (used as the EAP-TTLS inner authentication algorithm)
• MS-CHAPv2.0 (used as the EAP-PEAP and EAP-TTLS inner authentication algorithm)
• AES-128, AES-256 Encryption (used for securing WPS and TLS traffic)
• BigInt module for large integer arithmetic (for Public Key Cryptographic computations)
• RSA Public Key cryptography algorithms (includes RSA Signature and RSA Encryption algorithms)
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3. WINC Initialization and Simple Application
After powering-up the WINC device, a set of synchronous initialization sequences must be executed, for
the correct operation of the Wi-Fi functions. This chapter aims to explain the different steps required
during the initialization phase of the system. After initialization, the host MCU application is required to
call the WINC driver entry point to handle events from the WINC firmware.
• BSP Initialization
• WINC Host Driver Initialization
• Socket Layer Initialization
• Call WINC Driver Entry Point
Note: The initialization sequence must be completed to successfully operate the WINC start-up
procedure.
3.1 BSP Initialization
The BSP is initialized by calling the nm_bsp_init API. The BSP initialization routine performs the
following steps:
• Resets the WINC1
using the corresponding host MCU control GPIOs.
• Initializes the host MCU GPIO which connects to the WINC interrupt line. It configures the GPIO as
an interrupt source to the host MCU. During runtime, the WINC interrupts the host to notify the
application of events and data pending inside the WINC firmware.
• Initializes the host MCU delay function used within nm_bsp_sleep implementation.
3.2 WINC Host Driver Initialization
The WINC host driver is initialized by calling the m2m_wifi_init API. The host driver initialization
routine performs the following steps:
• Initializes the bus wrapper and SPI peripheral. The compilation flag CONF_WINC_USE_SPI must be
enabled in conf_winc.h (bus interfaces CONF_WINC_USE_UART and CONF_WINC_USE_I2C are
currently not supported).
• Registers an application-defined Wi-Fi event handler.
• Initializes the driver and ensures compatibility between the WINC firmware version and the driver
version.
• Initializes the host interface and the Wi-Fi layer and registers the BSP Interrupt.
Note: A Wi-Fi event handler is required for the correct operation of any WINC application.
3.3 Socket Layer Initialization
Socket layer initialization is carried out by calling the socketInit API. It must be called prior to any
socket activity. For more information about socket initialization and programming, refer to WINC Sockets
API.
1 Refer to the ATWINC15x0-MR210xB Data Sheet (DS70005304) for more information about the
hardware power-up/down sequence.
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3.4 WINC Event Handling
The WINC host driver API allows the host MCU application to interact with the WINC firmware. To
facilitate interaction, the WINC driver implements the Host Interface (HIF) Protocol as described in
Section 15 “Host Interface (HIF) Protocol”. The HIF protocol defines how to serialize and de-serialize
API requests and response callbacks over the serial bus interface SPI (I2C and UART are currently not
supported).
Figure 3-1. WINC System Architecture
The WINC host driver API provides services to the host MCU applications that are mainly divided in two
major categories: Wi-Fi control services and Socket services. The Wi-Fi control services allow actions
such as channel scanning, network identification, connection and disconnection. The Socket control
services allow application data transfer once a Wi-Fi connection is established.
3.4.1 Asynchronous Events
Some APIs in the ATWINC15x0 host driver are synchronous function calls, where the result is ready by
the return of the function. However, most API functions in the ATWINC15x0 host driver are asynchronous.
This means that when the application calls an API to request a service, the call is non-blocking and
returns immediately, before the requested action is completed. When completed, a notification is provided
in the form of a HIF protocol message from the WINC firmware to the host which, in turn, is delivered to
the application via a callback2
function. Asynchronous operation is essential when the requested service
such as Wi-Fi connection may take significant time to complete. In general, the ATWINC15x0 firmware
uses asynchronous events to signal the host driver about status change or pending data.
The HIF uses push architecture where the data and events are pushed from the ATWINC15x0 firmware
to the host MCU in a First-Come First-Served (FCFS) manner. For instance, the host MCU application
has two open sockets: socket 1 and socket 2. If the ATWINC15x0 receives socket 1 data followed by
socket 2 data, then HIF delivers socket data in two HIF protocol messages in the order in which it is
received. HIF does not allow reading socket 2 data before socket 1 data.
3.4.2 Interrupt Handling
The HIF interrupts the host MCU when one or more events are pending in the ATWINC15x0 firmware.
The host MCU application is a big state machine which processes received data and events when the
2 The callback is C function which contains an application-defined logic. The callback is registered
using the ATWINC15x0 host driver registration API to handle the result of the requested service.
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ATWINC15x0 driver calls the event callback function(s). To receive event callbacks, the host MCU
application is required to call the m2m_wifi_handle_events API to let the host driver retrieve and
process the pending events from the ATWINC15x0 firmware. It is recommended to call this function if any
of the following events occur:
• The host MCU application polls the API in main loop or a dedicated task
• When the host MCU receives an interrupt from the ATWINC15x0 firmware
Note: All the application-defined event callback functions registered with the ATWINC15x0 driver run in
the context m2m_wifi_handle_events API.
The above HIF architecture allows the ATWINC15x0 host driver to be flexible to run in the following
configurations:
• Host MCU with no operating system configuration – the MCU main loop is responsible to handle
deferred work from the interrupt handler
• Host MCU with operating system configuration – a dedicated task or thread is required to call
m2m_wifi_handle_events to handle deferred work from the interrupt handler
Note:
1. Host driver entry point m2m_wifi_handle_events is non-reentrant. In the operating system
configuration, it is required to protect the host driver from reentrance by a synchronization object.
2. When the host MCU is polling m2m_wifi_handle_events, the API checks for pending
unhandled interrupt from the ATWINC15x0. If no interrupt is pending, it returns immediately. If an
interrupt is pending, m2m_wifi_handle_events sequentially reads all the pending HIF
messages and dispatches the HIF message content to the respective registered callback. If a
callback is not registered to handle the type of message, the HIF message content is discarded.
3.5 Example Code
The following example code shows the initialization flow, as described in the previous sections.
static void wifi_cb(uint8_t u8MsgType, void *pvMsg)
{
}
int main (void)
{
tstrWifiInitParam param;
nm_bsp_init();
m2m_memset((uint8*)¶m, 0, sizeof(param));
param.pfAppWifiCb = wifi_cb;
/*intilize the WINC Driver*/
ret = m2m_wifi_init(¶m);
if (M2M_SUCCESS != ret){
M2M_ERR("Driver Init Failed <%d>\n",ret);
while(1);
}
while(1){
/* Handle the app state machine plus the WINC event handler */
while(m2m_wifi_handle_events(NULL) != M2M_SUCCESS) {
}
}
}
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4. ATWINC15x0 Configuration
The ATWINC15x0 firmware offers a set of configurable parameters that control its behavior. There is a set
of APIs provided to the host MCU application to configure these parameters. The configuration APIs are
categorized according to their functionality, into device, network and power saving parameters.
Any parameters left unset by the host MCU application use their default values assigned during the
initialization of the ATWINC15x0 firmware. A host MCU application needs to configure its parameters
when coming out of cold boot or when a specific configuration change is required.
4.1 Device Parameters
4.1.1 System Time
It is important to set the WINC system to UTC time to ensure a proper validity check of the X509
certificate expiration date. Since the WINC does not contain a built-in Real-Time Clock (RTC), there are
two ways to obtain UTC time:
• Using the internal SNTP client – this is enabled by default in the WINC firmware at start-up. The
SNTP client synchronizes the WINC system clock to the UTC time from the time servers. The NTP
server that SNTP client uses can be configured using the API m2m_wifi_configure_sntp. The
default NTP server used by the WINC is time-c.nist.gov. The SNTP client uses a default
update cycle of one day.
• From the host MCU RTC – if the host MCU has a RTC, the application may disable the SNTP client
by calling m2m_wifi_enable_sntp(0) (by passing zero as the argument) after the WINC
initialization. The application provisions the WINC system time by calling
m2m_wifi_set_system_time API.
4.1.2 Firmware and Driver Version
During initialization (m2m_wifi_init), the host driver checks the compatibility between the driver and
the WINC firmware. The relevant parameters are:
• M2M_HIF_MAJOR_VALUE
• M2M_HIF_MINOR_VALUE
Note: These parameters are stated in release note version information as “Host Interface Level: X.Y”.
If the driver and the WINC firmware have the same values of M2M_HIF_MAJOR_VALUE, then they are
deemed compatible and m2m_wifi_init returns with M2M_SUCCESS.
If the driver and the WINC firmware have different values of M2M_HIF_MAJOR_VALUE, then they are
deemed incompatible and m2m_wifi_init returns with M2M_ERR_FW_VER_MISMATCH. In this case,
communication is limited; the only permitted communication is for the driver to request the WINC firmware
to switch to the WINC firmware image in the inactive partition of WINC flash, via
m2m_wifi_check_ota_rb and m2m_ota_switch_firmware.
Example code to handle this situation is available in the driver file m2m_ota.h.
4.2 WINC Modes of Operation
The WINC firmware supports the following modes of operation:
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• Idle mode
• Wi-Fi STA mode
• Wi-Fi Hotspot (AP)
Figure 4-1. WINC Modes of Operation
IDLE AP STA
m2_wifi_connect
m2m_wifi_default_connect
M2M_WIFI_RESP_CON_STATE_CHANGED
m2m_wifi_disconnect
m2m_wifi_disable_ap
m2m_wifi_enable_ap
4.2.1 Idle Mode
After the host MCU application calls the ATWINC15x0 driver initialization m2m_wifi_init API, the
ATWINC15x0 remains in Idle mode waiting for any command to change the mode or to update the
configuration parameters. In this mode, the ATWINC15x0 enters into Power Save mode which disables
the IEEE 802.11 radio and all unneeded peripherals and suspends the ATWINC15x0 CPU. If the
ATWINC15x0 receives any configuration commands from the host MCU, it updates the configuration,
sends back the response to the host MCU, and then returns to the Power Save mode.
4.2.2 Wi-Fi Station Mode
The ATWINC15x0 enters Station (STA) mode when the host MCU requests connection to an AP using
the m2m_wifi_connect or m2m_wifi_default_connect APIs.
Note: m2m_wifi_connect is deprecated from v19.6.1 and above. For more details, see 5.3 Wi-Fi
Security.
The ATWINC15x0 exits STA mode when it receives a disconnect request from the Wi-Fi AP conveyed to
the host MCU application via the event callback M2M_WIFI_RESP_CON_STATE_CHANGED or when the
host MCU application decides to terminate the connection via m2m_wifi_disconnect API.
Note: The supported API functions in this mode use the HIF command types: tenuM2mConfigCmd and
tenuM2mStaCmd. See the full list of commands in the m2m_types.h header file.
For more information about STA mode, refer to Wi-Fi Station Mode.
4.2.3 Wi-Fi Hotspot (AP) Mode
In AP mode, the WINC allows Wi-Fi stations to connect and obtain the IP address from the WINC DHCP
server. To enter AP mode, the host MCU application calls m2m_wifi_enable_ap API. To exit AP mode,
the application calls m2m_wifi_disable_ap API.
The supported API functions in this mode use the HIF command types: tenuM2mApCmd and
tenuM2mConfigCmd. See the full list of commands in the m2m_types.h header file.
For more information about this mode, refer to Wi-Fi AP Mode.
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4.3 Network Parameters
4.3.1 Wi-Fi MAC Address
The WINC firmware provides two methods to assign the WINC MAC address:
• Assignment from the host MCU – this method occurs when the host MCU application calls the
m2m_wifi_set_mac_address API after initialization using m2m_wifi_init API.
• Assignment from the WINC OTP (One-Time-Programmable) memory – the WINC supports an
internal MAC address assignment method through a built-in OTP memory. If MAC address is
programmed in the WINC OTP memory, the WINC working MAC address defaults to the OTP MAC
address unless the host MCU application programmatically sets a different MAC address after
initialization using the API m2m_wifi_set_mac_address.
Note:
• OTP MAC address is programmed in the WINC OTP memory at the time of manufacturing.
• Use m2m_wifi_get_otp_mac_address API to check if there is a valid programmed MAC
address in the WINC OTP memory. The host MCU application can also use the same API to read
the OTP MAC address octets. m2m_wifi_get_otp_mac_address API not to be confused with
the m2m_wifi_get_mac_address API which reads the working WINC MAC address in the WINC
firmware regardless from whether it is assigned from the host MCU or from the WINC OTP.
• For more details on API, refer to the Atmel Software Framework for ATWINC1500 (Wi-Fi).
4.3.2 IP Address
The ATWINC15x0 firmware uses the embedded DHCP client to automatically obtain an IP configuration
after a successful Wi-Fi connection. DHCP is the preferred method and therefore it is used as a default
method. After the IP configuration is obtained, the host MCU application is notified by the asynchronous
event M2M_WIFI_REQ_DHCP_CONF.
Alternatively, the host MCU application can set a static IP configuration by calling the
m2m_wifi_set_static_ip API. Before setting a static IP address, it is recommended to disable DHCP
using the API m2m_wifi_enable_dhcp(0) and then set the static IP as shown below.
In Main(), disable dhcp after m2m_wifi_init as shown below
/* Initialize Wi-Fi driver with data and status callbacks. */
param.pfAppWifiCb = wifi_cb;
ret = m2m_wifi_init(¶m);
if (M2M_SUCCESS != ret)
{
printf("main: m2m_wifi_init call error!(%d)\r\n", ret);
while (1)
{}
}
m2m_wifi_enable_dhcp(0);
Set Static IP when WINC is connected to AP as shown below.
static void wifi_cb(uint8_t u8MsgType, void *pvMsg)
{
switch (u8MsgType) {
case M2M_WIFI_RESP_CON_STATE_CHANGED:
{
tstrM2mWifiStateChanged *pstrWifiState = (tstrM2mWifiStateChanged *)pvMsg;
if (pstrWifiState->u8CurrState == M2M_WIFI_CONNECTED){
printf("Wi-Fi connected\r\n");
tstrM2MIPConfig ip_client;
ip_client.u32StaticIP = _htonl(0xc0a80167); // Provide the required Static
IP
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ip_client.u32DNS = _htonl(0xc0a80101); // Provide DNS server details
ip_client.u32SubnetMask = _htonl(0xFFFFFF00); // Provide the SubnetMask for
the currently connected AP
ip_client.u32Gateway = _htonl(0xc0a80101); // Provide the GAteway IP for
the AP
printf("Wi-Fi setting static ip\r\n");
m2m_wifi_set_static_ip(&ip_client);
}
}
}
4.4 Power Save Modes
The WINC firmware supports multiple Power Save modes which provide flexibility to the host MCU
application to tweak the system power consumption. The host MCU can configure the WINC Power
Saving policy using the m2m_wifi_set_sleep_mode and m2m_wifi_set_lsn_int APIs.
The WINC supports the following Power Save modes:
• M2M_PS_MANUAL
• M2M_PS_DEEP_AUTOMATIC
• M2M_PS_AUTOMATIC (deprecated, not be used in new implementations)
• M2M_PS_H_AUTOMATIC (deprecated, not be used in new implementations)
Note: M2M_PS_DEEP_AUTOMATIC mode recommended for most applications.
4.4.1 M2M_PS_MANUAL
This is a fully host-driven Power Save mode.
• The WINC sleeps when the host uses the m2m_wifi_request_sleep API. During this period,
the host MCU can also sleep for extended durations.
• The WINC wakes up when the host MCU application requests services from the WINC by calling
any host driver API function, for example, Wi-Fi or socket operation.
Note: In M2M_PS_MANUAL mode, when the WINC sleeps due to m2m_wifi_request_sleep API, the
WINC does not wake up to receive and monitor AP beacon. Beacon monitoring is resumed when the host
MCU application wakes up the WINC.
For an active Wi-Fi connection, the AP may exit the connection if the WINC is unavailable due to long
sleep time. If connection is dropped, the WINC detects the disconnection on the next wake-up cycle and
notifies the host to reconnect to the AP again. To maintain an active Wi-Fi connection for extended
durations, the host MCU application must periodically wake up the WINC in order to send a keep-alive
Wi-Fi frame to the AP. The host must carefully choose the sleep period to satisfy the tradeoff between
keeping the Wi-Fi connection uninterrupted and minimizing the system power consumption.
This mode is useful for applications which send notifications very rarely due to a certain trigger. It also fits
applications which periodically send notifications with a very long spacing between notifications. Careful
power planning is required when using this mode. If the host MCU decides to sleep for a longer period, it
may use M2M_PS_MANUAL or may power off the WINC3
. The advantage of this mode compared to
powering off the WINC is that M2M_PS_MANUAL saves the time required for the WINC firmware to boot
since the firmware is always loaded in the WINC memory. The real advantage and disadvantage depend
on the nature of the application. In some applications, the sleep duration can be long enough to be a
3 Refer to the ATWINC15x0-MR210xB Data Sheet (DS70005304) for more information about the
hardware power-up/down sequence.
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power-efficient decision to power off the WINC and then power it on again and reconnect to the AP when
the host MCU wakes up. In other situations, a latency-sensitive application may choose to use
M2M_PS_MANUAL to avoid the WINC firmware boot latency on the expense of slightly increased power
consumption.
During the WINC Sleep mode, the WINC in M2M_PS_MANUAL mode saves more power than
M2M_PS_DEEP_AUTOMATIC mode. In M2M_PS_MANUAL mode, the WINC skips beacon monitoring
whereas in M2M_PS_DEEP_AUTOMATIC mode, it wakes up to receive beacons. The comparison also
includes the effect of the host MCU sleep duration: if the host MCU sleeps for a longer period, the Wi-Fi
connection may frequently drop and the power advantage of the M2M_PS_MANUAL mode is lost due to the
power consumed in the Wi-Fi reconnection. In contrast, the M2M_PS_DEEP_AUTOMATIC mode can keep
the Wi-Fi connection for long durations at the expense of waking up the WINC to monitor the AP beacon.
4.4.2 M2M_PS_AUTOMATIC
This mode is deprecated and kept for backward compatibility and development reasons. It is not
recommended to use in new implementations.
4.4.3 M2M_PS_H_AUTOMATIC
This mode is deprecated and kept for backward compatibility and development reasons. It is not
recommended to use in new implementations.
4.4.4 M2M_PS_DEEP_AUTOMATIC
This mode implements the Wi-Fi standard power-saving method in the WINC module. The WINC sleeps
and periodically wakes up to monitor AP beacons. The AP is required to buffer data while stations are in
Power Save mode and transmit data when stations wake-up. The AP periodically transmits a beacon
frame to synchronize with a network for every beacon period. A station, which is in Power Save mode,
periodically wakes up to receive the beacon. The beacon conveys information to the station about
pending unicast data, which are buffered inside the AP while the station was in Sleep mode. The beacon
also provides information about the broadcast/multicast data.
In this mode, the WINC module enters into Sleep state by turning off the IEEE 802.11 radio, MAC, and
system clock. Prior to entering the Sleep mode, the ATWINC15x0 programs a hardware timer (running on
an internal low-power oscillator) with a sleep period determined by the WINC firmware power
management module.
Any of the following events can wake-up the WINC module from Sleep state:
• Expiry of the hardware sleep timer. The WINC wakes up to receive the upcoming beacon from AP.
• The WINC wakes up4
when the host MCU application requests services from the WINC by calling
any host driver API function, for example, Wi-Fi or socket operation.
4.5 Configuring Listen Interval and DTIM Monitoring
The WINC allows the host MCU application to tweak system power consumption by configuring beacon
monitoring parameters. The AP periodically send beacons for every DTIM period (for example, 100 ms).
The beacon contains a TIM element which informs the station about the unicast data for the station that
are buffered in the AP. The station negotiates with the AP for a listen interval. The listen interval tells the
AP for how many beacon periods the station will sleep before it wakes up to receive data buffered in the
4 The wake-up sequence is internally handled in the WINC host driver by the hif_chip_wake API.
Refer to Section 15 “Host Interface Protocol” for more information.
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AP. Some APs might drop buffered data after Listen Interval elapses if the data is not retrieved by the
station.
The WINC driver allows the host MCU application to configure beacon monitoring parameters as follows:
• Configure DTIM monitoring – that is to enable or disable reception of broadcast/multicast data
using the following API:
– m2m_wifi_set_sleep_mode(desired_mode, 1) to receive broadcast data
– m2m_wifi_set_sleep_mode(desired_mode, 0) to ignore broadcast data
• Configure the listen interval – using the m2m_wifi_set_lsn_int API
Note: Listen interval value provided to the m2m_wifi_set_lsn_int API is expressed in the unit of
beacon period.
ATWINC15x0
ATWINC15x0 Configuration
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 19
5. Wi-Fi Station Mode
This chapter provides information about the WINC Wi-Fi Station (STA) mode as described in Wi-Fi
Station Mode. The STA mode involves a scan operation; association to an AP using parameters (SSID
and credentials) provided by the host MCU or using AP parameters stored in the WINC nonvolatile
storage (default connection). The chapter also provides information about supported security modes
along with code examples.
5.1 Scan Configuration Parameters
5.1.1 Scan Region
The number of RF channels supported varies by geographical region. For example, 13 channels are
supported in Asia while 11 channels are supported in North America. By default, the WINC initial region
configuration is equal to 14 channels, but this can be changed by setting the scan region using the
m2m_wifi_set_scan_region API. The scan region can be selected from the enum
tenuM2mScanRegion.
5.1.2 Scan Options
During Wi-Fi scan operation, the WINC sends probe request Wi-Fi frames and waits for the scan wait
time to receive probe response frames in the current Wi-Fi channel. After the scan wait time, the WINC
switches to the next channel. Increasing the scan wait time increases the possibility to detect more
number of access points during scan operation but this leads to more power consumption and overall
scan duration. The WINC firmware default scan wait time is optimized to provide the tradeoff between the
power consumption and scan accuracy. The WINC firmware provides flexible configuration options to
allow the host MCU application to set the scan time. For more details, refer to the
m2m_wifi_set_scan_options API.
5.2 Wi-Fi Scan
A Wi-Fi scan operation can be initiated by calling the m2m_wifi_request_scan API. The scan can be
performed on all 2.4GHz Wi-Fi channels or on a specific requested channel.
The scan response time depends on the scan options which can be set by calling
m2m_wifi_set_scan_options(tstrM2MScanOption* ptstrM2MScanOption). For instance, if
the host MCU application requests to scan all channels, the scan time is equal to NoOfChannels (13) *
ptstrM2MScanOption->u8NumOfSlot * ptstrM2MScanOption->u8SlotTime.
The scan operation is illustrated in the following figure.
ATWINC15x0
Wi-Fi Station Mode
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 20
Figure 5-1. Wi-Fi Scan Operation
5.3 Wi-Fi Security
The following types of security are supported in the WINC Wi-Fi STA mode.
• OPEN
• WEP (Wired Equivalent Protocol)
• WPA/WPA2 (Wi-Fi Protected Access - Personal Security mode that is Passphrase)
• 802.1X (WPA/WPA2-Enterprise security)
For 802.1X Enterprise Security, the following authentication methods are supported from ATWINC1500
firmware version 19.6.1.
• EAP-TLS
• EAP-PEAPv0/TLS
• EAP-PEAPv1/TLS
• EAP-TTLSv0/MSCHAPv2
• EAP-PEAPv0/MSCHAPv2
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• EAP-PEAPv1/MSCHAPv2
The m2m_wifi_connect is deprecated from v19.6.1 and above firmware. The legacy APIs
m2m_wifi_connect and m2m_wifi_connect_sc are available as wrappers for the new APIs.
Functionally its behavior is unchanged from previously released drivers.
The recommended API for various security type such as OPEN, WEP, WPA/WPA2, 802.1X are
summarized in the Table 5-1.
All new connect APIs, enable connection to a particular access point by specifying its BSSID and the
SSID. To restrict connection to a specific access point, the application can specify the BSSID (in addition
to SSID) in the argument tstrNetworkId -> pu8Bssid.
The application can instruct the WINC whether to store the credentials or not to store in Flash and also
whether the saved credentials must be encrypted or not. This is done by configuring the enum
tenuCredStoreOption.
For enterprise security, the application can configure WINC to send actual identity or use anonymous
identity during phase 1 authentication. This can be done by setting or clearing bUnencryptedUserName
in argument tstrAuth1xTls or tstrAuth1xMschap2.
For more details on usage of API m2m_wifi_connect_1x_tls, refer ASF (v3.42 or above) example
"WINC1500 Connecting a EAP-TLS / PEAPv0 with TLS / PEAPv1 with TLS Secured AP Example".
For more details on usage of API m2m_wifi_connect_1x_mschap2, refer ASF (v3.42 or above)
example "WINC1500 Connecting a EAP-TTLSv0 with MSCHAPv2 / EAP-PEAPv0 with MSCHAPv2 /
EAP-PEAPv1 with MSCHAPv2 Secured AP Example".
5.4 On Demand Wi-Fi Connection
The host MCU application may establish a Wi-Fi connection on demand when all the required connection
parameters (SSID, security credentials, and so on.) are known to the application. To start a Wi-Fi
connection on demand, the application calls the following APIs based on the security type.
Table 5-1. List of APIs based on Security Type
Security Type API
Open m2m_wifi_connect_open
WEP m2m_wifi_connect_wep
WPA/WPA2 m2m_wifi_connect_psk
802.1x with MSCHAPv2 m2m_wifi_connect_1x_mschap2
802.1x with TLS m2m_wifi_connect_1x_tls
Alternatively, the application can call the API m2m_wifi_connect to connect with an access point which
supports Open, WEP, WPA/WPA2 and 802.1x with MSCHAPv2. m2m_wifi_connect is deprecated in
v19.6.1 and is kept for legacy purpose.
Note: Using the API in the Table 5-1 implies that the host MCU application has prior knowledge of the
connection parameters. For instance, connection parameters can be stored on nonvolatile storage
attached to the host MCU.
The Wi-Fi on demand connection operation is described in the following figure.
ATWINC15x0
Wi-Fi Station Mode
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 22
Figure 5-2. On-demand Wi-Fi Connection
5.4.1 Example Code
5.4.1.1 Example Code for Connecting to Enterprise Network (PEAP and TTLSv0) with MSCHAPv2 as Phase2
Authentication
#define MAIN_WLAN_SSID "WINC1500_ENTERPRISE" /**< Destination SSID */
#define MAIN_WLAN_802_1X_USR_NAME "DEMO_USER" /**< RADIUS user account name */
#define MAIN_WLAN_802_1X_PWD "DemoPassword" /**< RADIUS user account password */
int main(void)
{
int8_t ret;
tstrWifiInitParam param;
tstrNetworkId networkId;
tstrAuth1xMschap2 mschapv2_credential;
/* Initialize the board. */
system_init();
/* Initialize the UART console. */
configure_console();
printf(STRING_HEADER);
/* Initialize the BSP. */
nm_bsp_init();
/* Initialize Wi-Fi parameters structure. */
memset((uint8_t *)¶m, 0, sizeof(tstrWifiInitParam));
/* Initialize Wi-Fi driver with data and status callbacks. */
param.pfAppWifiCb = wifi_cb;
ret = m2m_wifi_init(¶m);
if (M2M_SUCCESS != ret) {
printf("main: m2m_wifi_init call error!(%d)\r\n", ret);
while (1) {
}
}
ATWINC15x0
Wi-Fi Station Mode
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 23
networkId.pu8Bssid = NULL;
networkId.pu8Ssid = (uint8 *)MAIN_WLAN_SSID;
networkId.u8SsidLen = strlen(MAIN_WLAN_SSID);
networkId.enuChannel = M2M_WIFI_CH_ALL;
mschapv2_credential.pu8Domain = NULL;
//mschapv2_credential.u16DomainLen = strlen(mschapv2_credential.pu8Domain);
mschapv2_credential.pu8UserName = (uint8 *)MAIN_WLAN_802_1X_USR_NAME;
mschapv2_credential.pu8Password = (uint8 *)MAIN_WLAN_802_1X_PWD;
mschapv2_credential.u16UserNameLen = strlen(MAIN_WLAN_802_1X_USR_NAME);
mschapv2_credential.u16PasswordLen = strlen(MAIN_WLAN_802_1X_PWD);
mschapv2_credential.bUnencryptedUserName = false;
mschapv2_credential.bPrependDomain = true;
printf("Connecting to %s\r\n\tUsername:%s\r\n", MAIN_WLAN_SSID,
MAIN_WLAN_802_1X_USR_NAME);
m2m_wifi_connect_1x_mschap2( WIFI_CRED_SAVE_ENCRYPTED, &networkId, &mschapv2_credential);
/* Infinite loop to handle a event from the WINC1500. */
while (1) {
while (m2m_wifi_handle_events(NULL) != M2M_SUCCESS) {
}
}
return 0;
}
5.4.1.2 Example Code for Connecting to PEAP Enterprise Network with TLS as Phase2 Authentication and
EAP- TLS
/** security information for Wi-Fi connection */
#define MAIN_WLAN_SSID "WINC1500_ENTERPRISE" /**< Destination SSID */
#define MAIN_WLAN_802_1X_USR_NAME "DEMO_USER" /**< RADIUS user account name */
const uint8_t modulus[] = { /** private key modulus extracted from key file */ };
const uint8_t exponent[] = { /** private key exponent coefficient extracted from key file
*/ };
const uint8_t certificate[] = { /** certificate coefficient corresponding to Private Key
*/ };
int main(void)
{
int8_t ret;
tstrWifiInitParam param;
tstrNetworkId networkId;
tstrAuth1xTls tls_credential;
/* Initialize the board. */
system_init();
/* Initialize the UART console. */
configure_console();
printf(STRING_HEADER);
/* Initialize the BSP. */
nm_bsp_init();
/* Initialize Wi-Fi parameters structure. */
memset((uint8_t *)¶m, 0, sizeof(tstrWifiInitParam));
/* Initialize Wi-Fi driver with data and status callbacks. */
param.pfAppWifiCb = wifi_cb;
ret = m2m_wifi_init(¶m);
if (M2M_SUCCESS != ret) {
printf("main: m2m_wifi_init call error!(%d)\r\n", ret);
while (1) {
}
}
printf("Username:%s\r\n",MAIN_WLAN_802_1X_USR_NAME);
/* Connect to the enterprise network. */
networkId.pu8Bssid = NULL;
networkId.pu8Ssid = (uint8 *)MAIN_WLAN_SSID;
networkId.u8SsidLen = strlen(MAIN_WLAN_SSID);
networkId.enuChannel = M2M_WIFI_CH_ALL;
ATWINC15x0
Wi-Fi Station Mode
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tls_credential.pu8Domain = NULL;
tls_credential.pu8UserName = (uint8 *)MAIN_WLAN_802_1X_USR_NAME;
tls_credential.pu8PrivateKey_Mod = (uint8 *)modulus;
tls_credential.pu8PrivateKey_Exp = (uint8 *)exponent;
tls_credential.pu8Certificate = (uint8 *)certificate;
tls_credential.u16UserNameLen = strlen(MAIN_WLAN_802_1X_USR_NAME);
tls_credential.u16PrivateKeyLen = sizeof(modulus);
tls_credential.u16CertificateLen = sizeof(certificate);
tls_credential.bUnencryptedUserName = true;
tls_credential.bPrependDomain = true;
printf("Connecting to %s...\r\n\t\tUsername:%s\r
\n",networkId.pu8Ssid,tls_credential.pu8UserName);
m2m_wifi_connect_1x_tls(WIFI_CRED_SAVE_ENCRYPTED, &networkId, &tls_credential);
/* Infinite loop to handle a event from the WINC1500. */
while (1) {
while (m2m_wifi_handle_events(NULL) != M2M_SUCCESS) {
}
}
return 0;
}
5.5 Default Connection
The host MCU application establishes the default connection based on the connection profile stored in
the WINC serial Flash using the m2m_wifi_default_connect API. This API does not require AP
information to establish the connection.
Note: The connection profile information is automatically stored in the WINC Flash when on-demand WiFi
connection API is called (see Table 5-1). Saving of this connection profile is dependent on the enum
tenuCredStoreOption.
The credentials such as passphrase of the AP or Enterprise certificate and other parameters like SSID, IP
address, BSSID are encrypted using AES128-CBC before they are written into the serial Flash. This
makes it difficult for an attacker to retrieve the sensitive information even if an attacker has physical
access to the device. If there is no cached profile or if a connection cannot be established with any of the
cached profile, an event of type M2M_WIFI_RESP_DEFAULT_CONNECT is delivered to the host driver
indicating failure.
Upon successful default connection, the host application can read the current Wi-Fi connection status by
calling m2m_wifi_get_connection_info API. The m2m_wifi_get_connection_info is an
asynchronous API. The actual connection information is provided in the asynchronous event
M2M_WIFI_RESP_CONN_INFO in Wi-Fi callback. The callback parameter of type tstrM2MConnInfo
provides information about AP SSID, RSSI (AP received power level), security type, IP address obtained
by DHCP.
Note: A connection profile is cached in the serial Flash if and only if the connection is successfully
established with the target AP.
The Wi-Fi default connection operation is shown in the following figure.
ATWINC15x0
Wi-Fi Station Mode
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 25
Figure 5-3. Wi-Fi Default Connection
5.6 Encrypted Credential Storage
In ATWINC15x0 firmware v19.6.1 and above, the credentials such as passphrase of the AP or Enterprise
certificate and other parameters like SSID, IP address, BSSID are encrypted using AES128-CBC before
they are written into the serial Flash. This makes it difficult for an attacker to retrieve the sensitive
information inspite of having physical access to the device. The encryption provided by this feature must
not be considered secure. The encryption is only intended to prevent credentials being revealed in plain
text by an opportunistic read of ATWINC15x0 Flash. Therefore, other security practices must be followed
where possible, such as changing passwords regularly and deleting credentials when they are no longer
required.
When requesting for a connection to a network, the application can specify how the connection
credentials must be stored in ATWINC15x0 Flash. The options are as follows:
• Do not store credentials
• Store credentials unencrypted
• Store credentials encrypted
The credentials consist of:
• SSID
• BSSID (if provided)
• WEP key (for WEP connection)
• Passphrase and PSK (for WPA/WPA2 PSK connection)
• Domain, User name and Password (for WPA/WPA2 1x MSCHAPv2 connection)
• Domain, User name, Certificate and Private Key (for WPA/WPA2 1x TLS connection)
ATWINC15x0
Wi-Fi Station Mode
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 26
The credentials are stored in ATWINC15x0 Flash when connection succeeds, and only one set of
credentials is stored at a time; if new credentials need to be stored then the old credentials are removed
(overwritten with 0’s).
If credentials are stored in ATWINC15x0 Flash, then the application can request subsequent connections
without providing the credentials again, using m2m_wifi_default_connect.
If roaming is enabled, roaming can take place regardless of whether the credentials are stored in
ATWINC15x0 Flash. (They are stored in data memory for the duration of a connection.) The application
can delete credentials from ATWINC15x0 Flash using m2m_wifi_delete_sc.
Note: Version 19.6.1 firmware implements a new format for the ATWINC15x0 Flash store for connection
parameters. The effects of this are:
• During a firmware upgrade to v19.6.1, previously stored credentials are reformatted. After the first
successful connection to an access point, these stored credentials are encrypted.
• During a firmware upgrade to v19.6.1, previously stored IP address and Wi-Fi channel are deleted.
• After a firmware downgrade from v19.6.1 to previous firmware, credentials stored by v19.6.1
firmware are not readable by the previous firmware. The operation of the previous firmware is
otherwise unaffected.
5.7 Simple Roaming
Simple Roaming is a custom feature which is supported by WINC firmware version 19.6.1 and above.
With Simple Roaming feature enabled, the ATWINC1500 configured as station can move around in an
ESS area with multiple access point. The WINC automatically switches to another AP which has the
same SSID, authentication procedure and credentials with better signal strength. Roaming enables a
station to change its AP while remaining connected to the network. The following figure explains the
simple roaming feature.
ATWINC15x0
Wi-Fi Station Mode
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 27
Figure 5-4. Simple Roaming
STA AP in Range
New AP
Old AP
(1) Probe Request (Ch 1)
(2) Probe Response (Ch 1)
(1) Probe Request (Ch n)
(2) Probe Response (Ch n)
(5) Authentication Request
(6) Authentication Reply
(7) Reassociation Request
(12) Reassociation Reply
(8) Send Security Block
(9) Ack Security Block
(10) Move Notify
(11) Move Response
In v19.6.1, the WINC roam occurs on link-loss detection with the existing AP, which is determined by
tracking beacons and sending NULL frame keep-alive packets. ISO/OSI Layer 2 roaming occurs when
the WINC roams from one AP to another AP, both of which are inside the same IP subnet. Layer 3
roaming occurs when the WINC roams from one AP to another AP which are in different subnets,
whereby the WINC attempts to obtain a new IP address within the new subnet via DHCP. As a result of
layer 3 roaming, any existing network connections is broken, and the upper layer protocols handle this IP
address change if a continuous connection is required in layers 4 and above.
Roaming algorithm is internal to WINC firmware. The Host MCU can enable or disable the roaming
functionality using the API's m2m_wifi_enable_roaming and m2m_wifi_disable_roaming. The
roaming must be called after the WINC initialization.
When roaming is enabled, if the WINC successfully roamed to a new AP, then the
M2M_WIFI_RESP_CON_STATE_CHANGED message with state as M2M_WIFI_ROAMED is sent to host
MCU. If the WINC is not able to find a new AP, then M2M_WIFI_RESP_CON_STATE_CHANGED message
with state as M2M_WIFI_DISCONNECTED is sent to the host MCU.
The API call m2m_wifi_enable_roaming() sets the ATWINC15x0 to detect link-loss, and when link
loss is detected with the existing access point, the following roaming steps are performed.
• A precautionary de-authentication frame is sent to the old AP.
• Scanning is performed to determine if there is an AP within the same ESS as the previous AP in
the vicinity.
• If an AP is found, authentication and re-association messages are exchanged with the new AP,
followed by a normal 4-way security handshake in the case of WPA/WPA2, or an EAPOL exchange
in the case of 802.1x Enterprise security.
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• A DHCP request is sent to the new AP to attempt to retain the same IP address. A notification
event is sent to the host MCU of type M2M_WIFI_RESP_CON_STATE_CHANGE with the state of
M2M_WIFI_ROAMED. Additionally, an M2M_WIFI_REQ_DHCP_CONF event conveying either the
same or a new IP address is sent to the host MCU.
• If there is any problem with the connection, or DHCP fails, then a de-authentication message is
sent to the AP, and an M2M_WIFI_RESP_CON_STATE_CHANGED event is sent to the host MCU
with the state set as M2M_WIFI_DISCONNECTED.
The bEnableDhcp parameter enables control of whether or not a DHCP request is sent after roaming to
a new AP. The API call m2m_wifi_disable_roaming is used to disable roaming.
5.8 Multiple Gain Table
There are restrictions regarding the maximum transmit power of a wireless device according to the
regulatory agencies of the region. For Wi-Fi devices, the maximum transmit power is limited according the
regulation of the region in which the Wi-Fi device is used. The gain table can be used to configure the
transmission power in WINC. The digital gain (DG) that are used for different channels and different data
rates are stored in ATWINC15x0 Flash as a table called Gain table. In ATWINC15x0, the Power Amplifier
(PA) and Pre-power Amplifier (PPA) values are configured in the firmware directly.
The following figure shows the format of the gain table.
Figure 5-5. Gain Table
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 -10 -9 -9 -9 -9 -9 -9 -9 -9 -9 -10 -9 -9 -9
2 -10 -9 -9 -9 -9 -9 -9 -9 -9 -9 -10 -9 -9 -9
5.5 -10 -9 -9 -9 -9 -9 -9 -9 -9 -9 -10 -9 -9 -9
11 -10 -9 -9 -9 -9 -9 -9 -9 -9 -9 -10 -9 -9 -9
6 -11 -7 -7 -7 -7 -7 -7 -7 -7 -7 -9 -7 -7 -7
9 -11 -7 -7 -7 -7 -7 -7 -7 -7 -7 -9 -7 -7 -7
12 -11 -7 -7 -7 -7 -7 -7 -7 -7 -7 -9 -7 -7 -7
18 -11 -7 -7 -7 -7 -7 -7 -7 -7 -7 -9 -7 -7 -7
24 -11 -7 -7 -7 -7 -7 -7 -7 -7 -7 -9 -7 -7 -7
36 -11 -7 -7 -7 -7 -7 -7 -7 -7 -7 -9 -7 -7 -7
48 -11 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8 -8
54 -11 -9 -9 -9 -8 -8 -8 -8 -8 -8 -9 -8 -8 -8 mcs0 -12 -7 -7 -7 -7 -7 -7 -7 -7 -7 -10 -7 -7 -7 mcs1 -12 -7 -7 -7 -7 -7 -7 -7 -7 -7 -10 -7 -7 -7 mcs2 -12 -7 -7 -7 -7 -7 -7 -7 -7 -7 -10 -7 -7 -7 mcs3 -12 -7 -7 -7 -7 -7 -7 -7 -7 -7 -10 -7 -7 -7 mcs4 -12 -7 -7 -7 -7 -7 -7 -7 -7 -7 -10 -7 -7 -7 mcs5 -12 -8 -8 -7 -7 -7 -7 -7 -7 -7 -10 -7 -7 -7 mcs6 -12 -9 -8 -8 -8 -8 -8 -8 -8 -8 -10 -8 -8 -8 mcs7 -12 -10 -9 -9 -9 -9 -9 -9 -9 -9 -10 -9 -9 -9
1e9c 0
1edc 0
Data Rates
Channels
Digital
Gain
Specific
Configuration
The Gain tables are provided as part of firmware update package in form of .csv file available at src/
firmware/Tools/gain_builder/gain_sheets folder. The gain values are downloaded as part of
complete download process. For more details, see "WINC Devices – Integrated Serial Flash Memory
Download Procedure" document.
Prior to v19.6.1 only one gain table was supported in ATWINC15x0, with which the WINC can only
operate in one regulatory region without requiring different Flash content.
The ATWINC15x0 firmware version 19.6.1 or above supports multiple gain table and the Flash can store
up to four gain tables. The table can be selected by the Host MCU using the API
m2m_wifi_set_gain_table_idx. If the ATWINC15x0 has to operate in multiple region with maximum
ATWINC15x0
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© 2018 Microchip Technology Inc. User Guide DS00002389B-page 29
transmit power allowed in that region, multiple gain table feature can be used to select gain table (by Host
MCU) based on the region in which the ATWINC15x0 is operated.
5.8.1 Writing the Gain Table to ATWINC15x0
The gain builder application uses multiple .csv files (up to a maximum of 4) and perform the necessary
maths operations on the gain table to calculate the gain values and write them to the Flash:
gain_builder [-table
] [-index ][-no_wait] [-port]
Note: The img_path* parameters specify the separate tables, and the index parameter specifies the
default table to use on power up.
5.8.2 Selecting a Specific Gain Table
Setting the specific gain table index is achieved using API m2m_wifi_set_gain_table_idx. The
m2m_wifi_set_gain_table_idx must be called after the initialization and before any connection
request. The corresponding gain tables must be available in the Flash.
Note: The ATWINC15x0 firmware release v19.6.1 contains only one gain table that can be used in all
the region.
5.9 Host File Download
The Host File Download is a feature supported in the ATWINC15x0 firmware version 19.6.1 and above.
This feature is supported only in the ATWINC1510 device which has 8 Mb Flash. The ATWINC1500 only
has 4 Mbit of Flash memory and therefore this feature is not supported for the ATWINC1500. With Host
file download feature, the Host MCU can instruct the ATWINC1510 to download a file and save it in the
ATWINC1510 Flash. The ATWINC1510 can download the file from a HTTP or a HTTPS web server only.
The maximum size of file that can be stored in the ATWINC1510 is 508 KB. This feature is ideal for
updating the firmware of host MCU. However, the feature is not limited to MCU OTA only.
When performing MCU OTA updates, there is no enforced file format, so the Application Developer can
choose a strategy to perform integrity check validation on the received file. The WINC does not perform
any integrity check on the downloaded file and therefore, it is recommended that the Application do it
instead.
The feature is designed for single file support and allows for a maximum size of 508 KB. The driver
protects against invalid access to the file stored in the WINC’s Flash by using file handlers to identify each
file. If a new download starts or if the file is erased, access to the file partition is denied. Also, the
application can request an explicit erase to delete the file from the ATWINC’s Flash, destroying any
potentially confidential data.
The API m2m_ota_host_file_get is used to download file from remote location and store it in
ATWINC1500 Flash. The m2m_ota_host_file_get can be used to download only one file at a time.
When the get file API is called again, the previously stored file is erased and new file download is
initiated.
To retrieve the downloaded file from the ATWINC1510 Flash, m2m_ota_host_file_read_spi or
m2m_ota_host_file_read_hif API can be used by the host MCU. The completion of file download is
notified through the callback registered in m2m_ota_host_file_get API. The user can use the
m2m_ota_host_file_read_spi or m2m_ota_host_file_read_hif API by passing required
arguments to initiate the file read from the WINC Flash.
ATWINC15x0
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© 2018 Microchip Technology Inc. User Guide DS00002389B-page 30
5.9.1 Overview
Whenever an application needs information which is stored in a file somewhere in a remote location, the
application can use the Host File Download feature to retrieve the file from the remote location and
temporarily store it in the WINC’s Flash. When a download is successfully completed, a file handler is
generated and stored in NVM in the WINC, therefore it is valid even after a WINC reset. After a handler is
generated, access to the file is possible via the provided APIs and reading of a file is possible via two
mechanisms, HIF and SPI. In either case, the read operation requires the file handler of the file which the
application is trying to access, if the handler being requested and the handler internally stored match,
then the access is granted. The same procedure is valid for erasing the file. The use of a file handler
avoids access to invalid data, for example when trying to concurrently access the file. The following figure
depicts the steps which the WINC follows when performing a Host File Download.
Figure 5-6. Host File Download Operation within the WINC
OTA File Get
Check Available Space
Start Download
OTA Get
Successful OTA Get Failed
Notify Host of the Result
OK
Failed
Completed Failed
The download starts only if the space available in Flash is enough to store the file which is requested to
be downloaded. If Host File Download is requested in the ATWINC1500 (4 Mb Flash), the download fails
since there is no Host File partition in Flash and therefore no space to store the file.
The “Start Download” step causes any previously available valid file handler to be invalidated. When
“OTA Get Successful” message is received, a new file handler is generated along with the status and the
total size of the downloaded file, they are included in the Download completion notification sent to the
host.
5.9.2 OTA Initialization
To use the Host File Download feature, the WINC and the OTA driver must be initialized. The following is
the procedure for OTA initialization:
1. m2m_wifi_init or m2m_wifi_reinit – this API is required to initialize the WINC and to set up
the callback for the HIF communication. After this step, the WINC can be configured to connect to a
network and download a file. For more details to understand when to use each of these two
options, see the API documentation.
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2. m2m_ota_init – this API registers the OTA callback, which is required to execute any callbacks
configured through the Host File Download APIs and to notify the Application of file download
status.
5.9.3 Using Host File Download for MCU OTA
Host File Download allows an application to download a file from a remote location. The link to the file
can be through a secure connection and once the file is downloaded, it is stored in the WINC's Flash and
the Application is notified about it. The files to download can be of any kind and are not limited to MCU
binaries, making this feature both flexible and powerful. One example would be the download of text files,
which can hold, for instance, a file checksum, which can later be used by the Application to verify the
integrity of the downloaded binary. An Host MCU OTA requires the following steps:
• Provide an http/https link to the file to tell WINC to download the file from a specific remote location,
which can be done using API m2m_ota_host_file_get.
• Read the image from the WINC using spi_flash_read. Since there is a limitation currently in
which the bootloader would also need to perform m2m_wifi_init, m2m_ota_init and only then
it should do m2m_ota_host_file_read_spi to read the image from WINC.
m2m_ota_host_file_read_hif and m2m_ota_host_file_read_spi are not used in the
ASF Example for MCU OTA to keep the driver footprint small while working around the limitation
described above. However, this limitation is only present when the Application needs to be reset, or
in this case switch to a bootloader, the WINC driver will lose track of the file handler and will have to
load it again through the initialization process. If no reset or shutdown need to be performed and if
no different Application needs to be loaded after downloading the file, these two APIs can be used.
Figure 5-7. Example Host File Download for MCU OTA
File Get CB
Application WINC
Bootloader WINC
File Integrity Check
Switch to Bootloader
Switch to Application
File Handler inval
File Handler gen
MCU & WINC Reset
m2m_wifi_init()
m2m_ota_init()
**Connect to Wi-Fi network**
m2m_ota_host_file_get()
HIF Msg M2M_OTA_RESP_HOST_FILE_DOWNLOAD
m2m_wifi_download_mode()
spi_flash_read()
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Other steps that must be considered by the Application Developer are:
• It is recommended to verify the integrity of the image using a checksum calculation and match it
against a previously known checksum. The user can design the validation mechanism since no
predefined file format is enforced for MCU OTA.
• There is an option to erase the file from Flash. Although this is not mandatory before requesting a
new download, it can be useful for security purposes, ensuring that sensitive data is unavailable
after its use.
Note: The WINC does not perform any integrity check of any of the downloaded files via Host File
Download and that must be checked by the application.
5.9.4 API Description
For a more detailed description of the APIs, refer to WINC1500_SW_API.chm.
5.9.4.1 OTA File Get
NMI_API sint8 m2m_ota_host_file_get
(
unsigned char *pcDownloadUrl,
tpfFileGetCb pfHFDGetCb
);
This API is used to get a file which links to the file stored remotely. The link is passed to the WINC to
establish a TCP connection to retrieve the file from that location. It is also possible to use a server
configured for TLS.
A callback must also be provided so that it is executed when the File Get operation completes. The status
of the File Get is passed onto this callback and if the status is successful, the file handler generated by
the WINC and the total size of the downloaded file is passed correctly to the callback.
5.9.4.2 File Get Callback
typedef void (*tpfFileGetCb)
(
uint8 u8Status,
uint8 u8Handler,
uint32 u32Size
);
The callback for the File Get receives three arguments; status of the File Get request, file handler ID and
the total size of the file. If the status is OTA_STATUS_SUCCESS, then the file handler and size can be
used, otherwise its values are not populated. From the Application’s point of view, they must not be
considered valid.
The file handler is auto-generated in the WINC and it identifies the file. Only when a download finishes
successfully, the corresponding file handler is generated. The handler is required to both read from the
file or erase the file. Similarly, if the download is aborted or interrupted, then the handler is not generated,
instead the handler will have the value of HFD_INVALID_HANDLER, which blocks any further operation
on the Flash through the APIs.
When the file download completes successfully, the total size of the download file is passed to the
callback to notify the application. Using which the application tracks the total size of the downloaded data
and the amount of data read.
5.9.4.3 OTA File Read HIF
NMI_API sint8 m2m_ota_host_file_read_hif
(
uint8 u8Handler,
uint32 u32Offset,
uint32 u32Size,
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tpfFileReadCb pfHFDReadCb
);
When the download completes, the file is stored in the WINC’s Flash. This API can be used to read the
file from the WINC using HIF messages. It is mandatory to have a valid handler, not having one could
mean that the file has been invalidated and therefore it must be unavailable for any operation. This
protects read against invalid or corrupted data.
The offset marks the position in bytes of Flash to read from, counting from the beginning of the file.
Therefore, an offset of zero is translated as reading from the beginning of the file. Size specifies the
amount of bytes to read, starting at the offset defined. The last argument is the callback to be executed
when the read is complete.
Advantages (vs SPI read)
• While reading a file using HIF messages, the host can continue operation, being notified by an
interrupt from the WINC when data read is complete.
• Does not require the WINC to be reset after the read is complete.
Disadvantages (vs SPI read)
• File reads via HIF are slightly slower than reads via SPI.
5.9.4.4 File Read HIF Callback
typedef void (*tpfFileReadCb)
(
uint8 u8Status,
void *pBuff,
uint32 u32Size
);
The callback is only executed after a file read via HIF messages and it receives three arguments.
• The first argument is the status of the read, if the read is unsuccessful, then the other arguments
will have irrelevant values.
• The second argument is a pointer to the buffer of data read.
• The third argument is size, which indicates the amount of data read and therefore contained in the
buffer (maximum 128 bytes).
Specifying large amounts of data to be read via the HIF may exceed the buffer maximum size (128
bytes), therefore it is recommended to use u32Size to offset a second read from within this callback.
This requires the application to track the total size of the file and the amount of bytes read, requesting the
reading of each section at a time until the end of the file is reached.
5.9.4.5 OTA File Read SPI
NMI_API sint8 m2m_ota_host_file_read_spi
(
uint8 u8Handler,
uint8 *pu8Buff,
uint32 u32Offset,
uint32 u32Size
);
The file read via SPI is similar to the read via HIF. The use of a callback is not considered, because to
access the WINC’s Flash via SPI, the WINC must be set into a certain mode to allow for safe read/write
of its Flash. Therefore, it is typical to use a loop to read all the data necessary while the WINC is in that
state and then restart the WINC.
To use this API, the application must call m2m_wifi_download_mode to make the WINC safe for read/
write Flash access and once the read is completed, the WINC must be reinitialized (m2m_wifi_reinit,
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m2m_ota_init) and to connect to the network again if the Application based on the request. pu8Buff is
a pointer to a buffer provided by the Application and to where the data will be read to.
Advantages (vs HIF read)
• SPI read is faster than HIF Read.
Disadvantages (vs HIF read)
• Requires the WINC to set into a special mode and restart later.
• Generally blocks as the read are done within a loop to minimize WINC reset.
5.9.4.6 OTA File Erase API
NMI_API sint8 m2m_ota_host_file_erase
(
uint8 u8Handler,
tpfFileEraseCb pfHFDEraseCb
);
The File Erase API requires the following two arguments:
• The first argument is a handler of the file to erase, to ensure that it is valid to perform a Flash erase.
• The second argument is a callback which executes when the erase is complete.
Having a callback to tell the Application when the erase has been completed is useful to act as a trigger
for a subsequent operation (example, download a second file).
Note: The file erase performs an erase of the entire host file partition and any file handler is destroyed
regardless of the end result of the erase operation in the WINC. Since the data in the Flash is partially or
completely destroyed, the handlers are invalidated when the process starts for safety.
5.9.4.7 File Erase Callback
typedef void (*tpfFileEraseCb)
(
uint8 u8Status
);
The callback for a File Erase receives the erase status of the operation. A status of
OTA_STATUS_SUCCESS ensures that the data has been completely erased, any other result does not
ensure that the data is still valid, but also do not ensure that the data has been completely erased.
5.9.4.8 OTA Abort API
NMI_API sint8 m2m_ota_abort
(
void
);
If a Host File Download has been started and the Application decides to cancel the download, it can issue
a call to this API to do so. This does not require any input parameter.
Note: This API is shared with the WINC OTA and if issued when a WINC OTA is in progress, the WINC
OTA is canceled.
5.9.5 Limitations
• Out of 512 KB of Flash in the ATWINC1510, the first sector (of size 4 KB) is used by the WINC for
storing the file information for host file download feature. Which means that a total of 508 KB size of
Flash can be used by application to store the host file.
• The feature is only supported in ATWINC1510 since the ATWINC1500 only has 4 Mbit of Flash
memory, which means there is no space to store a file.
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• There is no file system and only one file is stored at a time. When the get file is called again, the
previously stored file is erased and a new file download is initiated.
• The WINC OTA firmware download and the Host OTA file download cannot run concurrently.
• The WINC interprets 404 Not Found error when application attempts to download a broken or
dead link and provides the OTA_STATUS_SERVER_ERROR error status. The WINC does not
interpret any other message for broken link. The WINC downloads the error message into SPI
Flash and indicates Host as file download. It is the application’s responsibility to check if the file is
valid.
5.9.6 Built in Automated Test Equipment (ATE) Mechanism
A factory flashed ATWINC15x0 module running the v19.6.1 firmware has a special ATE firmware in the
Flash space reserved for OTA transfers (which is overwritten by the first OTA update).
A host API can be called during WINC initialization that causes the device to boot into this special
firmware (m2m_ate_init). The API to control the ATE functions provided by this firmware is detailed in
\ASF\common\components\wifi\winc1500\driver\include\m2m_ate_mode.h.
The following is the sample code.
int main(void)
{
/* Initialize the board. */
system_init();
/* Initialize the UART console. */
configure_console();
printf(STRING_HEADER);
/* Initialize the BSP. */
nm_bsp_init();
/*Check if initialization of ATE firmware is succeeded or not*/
if(M2M_SUCCESS == m2m_ate_init())
{
/*Run TX test case if defined*/
#if (M2M_ATE_RUN_TX_TEST_CASE == ENABLE)
start_tx_test(M2M_ATE_TX_RATE_1_Mbps_INDEX);
#endif
/*Run RX test case if defined*/
#if (M2M_ATE_RUN_RX_TEST_CASE == ENABLE)
start_rx_test();
#endif
/*De-Initialization of ATE firmware test mode*/
m2m_ate_deinit();
}
else
{
M2M_ERR("Failed to initialize ATE firmware.\r\n");
while(1);
}
#if ((M2M_ATE_RUN_RX_TEST_CASE == ENABLE) && (M2M_ATE_RUN_TX_TEST_CASE == ENABLE))
M2M_INFO("Test cases have been finished.\r\n");
#else
M2M_INFO("Test case has been finished.\r\n");
#endif
while(1);
}
#if (M2M_ATE_RUN_TX_TEST_CASE == ENABLE)
static void start_tx_test(uint8_t tx_rate)
{
tstrM2mAteTx tx_struct;
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/*Initialize parameter structure*/
m2m_memset((uint8 *)&tx_struct, 0 , sizeof(tx_struct));
/*Set TX Configuration parameters,
*refer to tstrM2mAteTx for more information about parameters*/
tx_struct.channel_num = M2M_ATE_CHANNEL_11;
tx_struct.data_rate = m2m_ate_get_tx_rate(tx_rate);
tx_struct.dpd_ctrl = M2M_ATE_TX_DPD_DYNAMIC;
tx_struct.duty_cycle = M2M_ATE_TX_DUTY_1;
tx_struct.frame_len = 1024;
tx_struct.num_frames = 0;
tx_struct.phy_burst_tx = M2M_ATE_TX_SRC_MAC;
tx_struct.tx_gain_sel = M2M_ATE_TX_GAIN_DYNAMIC;
tx_struct.use_pmu = M2M_ATE_PMU_DISBLE;
tx_struct.cw_tx = M2M_ATE_TX_MODE_CW;
tx_struct.xo_offset_x1000 = 0;
/*Start TX Case*/
if(M2M_ATE_SUCCESS == m2m_ate_start_tx(&tx_struct))
{
uint32 u32TxTimeout = M2M_ATE_TEST_DURATION_IN_SEC;
M2M_INFO(">>Running TX Test case on CH<%02u>.\r\n", tx_struct.channel_num);
do
{
nm_bsp_sleep(1000);
printf("%02u\r", (unsigned int)u32TxTimeout);
}while(--u32TxTimeout);
if(M2M_ATE_SUCCESS == m2m_ate_stop_tx())
{
M2M_INFO("Completed TX Test successfully.\r\n");
}
}
else
{
M2M_INFO("Failed to start TX Test case.\r\n");
}
}
#endif
#if (M2M_ATE_RUN_RX_TEST_CASE == ENABLE)
static void start_rx_test(void)
{
tstrM2mAteRx rx_struct;
/*Initialize parameter structure*/
m2m_memset((uint8 *)&rx_struct, 0, sizeof(rx_struct));
/*Set RX Configuration parameters*/
rx_struct.channel_num = M2M_ATE_CHANNEL_6;
rx_struct.use_pmu = M2M_ATE_PMU_DISBLE;
rx_struct.xo_offset_x1000 = 0;
/*Start RX Case*/
if(M2M_ATE_SUCCESS == m2m_ate_start_rx(&rx_struct))
{
tstrM2mAteRxStatus rx_data;
uint32 u32RxTimeout = M2M_ATE_TEST_DURATION_IN_SEC;
M2M_INFO(">>Running RX Test case on CH<%02u>.\r\n", rx_struct.channel_num);
do
{
m2m_ate_read_rx_status(&rx_data);
M2M_INFO("Num Rx PKTs: %d, Num ERR PKTs: %d, PER: %1.3f",
(int)rx_data.num_rx_pkts, (int)rx_data.num_err_pkts,
(rx_data.num_rx_pkts>0)?((double)rx_data.num_err_pkts/
(double)rx_data.num_rx_pkts):(0));
nm_bsp_sleep(1000);
}while(--u32RxTimeout);
printf("\r\n");
if(M2M_ATE_SUCCESS == m2m_ate_stop_rx())
{
M2M_INFO("Compeleted RX Test successfully.\r\n");
}
}
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else
{
M2M_INFO("Failed to start RX Test case.\r\n");
}
}
#endif
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6. Socket Programming
6.1 Overview
The ATWINC15x0 socket Application Programming Interface (API) allows the host MCU application to
interact with intranet and remote internet hosts. The ATWINC15x0 socket API is based on the BSD
(Berkeley) sockets. This chapter explains the ATWINC15x0 socket programming and how it differs from
regular BSD sockets.
Note: The reader must have a basic understanding of the following topics before reading this chapter:
• BSD sockets
• TCP
• UDP
• Internet protocols
6.1.1 Socket Types
The ATWINC15x0 socket API provides two types of sockets:
• Datagram sockets (connectionless sockets) – uses the UDP protocol
• Stream sockets (connection-oriented sockets) – uses the TCP protocol
6.1.2 Socket Properties
Each ATWINC15x0 socket is identified by a unique combination of the following:
• Socket ID – a unique identifier for each socket. This is the return value of the socket API.
• Local socket address – a combination of the ATWINC15x0 IP address and port number assigned
by the ATWINC15x0 firmware for the socket.
• Protocol – transport layer protocol, either TCP or UDP.
• Remote socket address – applicable only for TCP stream sockets. This is necessary since TCP is
connection oriented. Each connection made to a specific IP address and port number requires a
separate socket. The remote socket address can be obtained in the socket event callback which is
described in the succeeding section.
Note: TCP port 53 and UDP port 53 represent two different sockets.
6.1.3 Limitations
• The ATWINC15x0 sockets API support up to 7 TCP sockets and 4 UDP sockets.
• The ATWINC15x0 sockets API support only IPv4. It does not support IPv6.
6.2 Sockets API
6.2.1 API Prerequisites
• C header file socket.h – this includes all the necessary socket API function declarations. When
using any ATWINC15x0 socket API as described in the following sections, the host MCU
application must include the socket.h header file.
• Initialization – the ATWINC15x0 socket API initializes once before calling any socket API function.
This is done using the socketInit API described in Socket API Functions.
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6.2.2 Non-blocking Asynchronous Socket APIs
Most ATWINC15x0 socket APIs are asynchronous function calls that do not block the host MCU
application. The behavior of the ATWINC15x0 asynchronous APIs are described in Asynchronous
Events.
For example, the host MCU application can register an application-defined socket event callback function
using the ATWINC15x0 socket API registerSocketCallback. When the host MCU application calls
the socket API connect, the API returns a zero value (SUCCESS) immediately indicating that the request
is accepted. The host MCU application must then wait for the ATWINC15x0 socket API to call the
registered socket callback when the connection is established or if a connection time-out occurred. The
socket callback function provides the necessary information to determine the connection status.
6.2.3 Socket API Functions
The ATWINC15x0 socket API provides the following functions.
6.2.3.1 socketInit
The host MCU application must call the API socketInit once during initialization. The API is a
synchronous API.
6.2.3.2 registerSocketCallback
The registerSocketCallback function allows the host MCU application to provide the ATWINC15x0
sockets with application-defined event callbacks for socket operations. The API is a synchronous API.
The API registers the following callbacks:
• The socket event callback
• The DNS resolve callback
The socket event callback is an application-defined function that is called by the ATWINC15x0 socket API
whenever a socket event occurs. Within this handler, the host MCU application must provide an
application-defined logic that handles the events of interest.
The DNS resolve event handler is the application-defined function that is called by the ATWINC15x0
socket API to return the results of gethostbyname. By implication, this only occurs after the host MCU
application has called the gethostbyname function. If successful, the callback provides the IP address
for the desired domain name.
6.2.3.3 socket
The socket function creates a new socket of a specified type and returns the corresponding socket ID.
The API is a synchronous API.
The socket ID is required by most other socket functions and is also passed as an argument to the socket
event callback function to identify which socket generated the event.
6.2.3.4 connect
The connect function is used with TCP sockets to establish a new connection to a TCP server.
The connect function results in a SOCKET_MSG_CONNECT sent to the socket event handler callback
upon completion. The connect event is sent when the TCP server accepts the connection or, if no remote
host response is received, after a time-out interval of approximately 30 seconds.
Note: The SOCKET_MSG_CONNECT event callback provides a tstrSocketConnectMsg containing an
error code. The error code value indicates:
• Zero value to indicate the successful connection or
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• Negative value to indicate an error due to a time-out condition or if connect is used with UDP
socket.
The following figure shows the ATWINC15x0 socket API connect to remote server host.
Figure 6-1. TCP Client API Call Sequence
6.2.3.5 bind
The bind function can be used for server operation for both UDP and TCP sockets. It is used to
associate a socket with an address structure (port number and IP address).
The bind function call results to a SOCKET_MSG_BIND event sent to the socket callback handler with the
bind status. Calls to listen, send, sendto, recv, and recvfrom functions must not be issued until the
bind callback is received.
6.2.3.6 listen
The listen function is used for server operations with TCP stream sockets. After calling the listen
API, the socket accepts a connection request from a remote host. The listen function causes a
SOCKET_MSG_LISTEN event notification to be sent to the host after the socket port is ready to indicate
listen operation success or failure.
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When a remote peer establishes a connection, a SOCKET_MSG_ACCEPT event notification is sent to the
application.
6.2.3.7 accept
The accept function is deprecated and calling this API has no effect. It is kept only for backward
compatibility.
Note: The listen API implicitly accepts the TCP remote peer connections request.
Figure 6-2. TCP Server API Call Sequence
Although the accept function is deprecated, the SOCKET_MSG_ACCEPT event occurs whenever a
remote host connects to the ATWINC15x0 TCP server. The event message contains the IP address and
port number of the connected remote host.
6.2.3.8 send
The send function is used by the application to send data to a remote host. The send function can be
used to send either UDP or TCP data depending on the type of socket.
• For a TCP socket a connection must be established first.
• For a UDP socket, the recommended way is to use sendto API, where the destination address is
defined. However, it is possible to use send API instead of sendto API. For this, at least one
successful call must be made to sendto API prior to the consecutive calls of send function. This
ensures that the destination address is saved in the ATWINC15x0 firmware.
The send function generates a SOCKET_MSG_SEND event callback after the data is transmitted to the
remote host. For TCP sockets, this event guarantees that the data is delivered to the remote host TCP/IP
stack (the remote application must use the recv function to read the data). For UDP sockets, it means
that the data is transmitted, but there is no guarantee that the data is delivered to the remote host as per
UDP protocol. The application is responsible to guarantee data delivery in the UDP sockets case.
The SOCKET_MSG_SEND event callback returns the size of the data transmitted of the transmission in the
success case and zero or negative value in case of an error.
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6.2.3.9 sendto
The sendto function is used by the application to send UDP data to a remote host. It can only be used
with UDP sockets. The IP address and port of the destination remote host is included as a parameter to
the sendto function.
The SOCKET_MSG_SENDTO event callback returns the size of the data transmitted in the success case
and zero or negative value in case of an error.
6.2.3.10 recv/recvfrom
The recv and recvfrom functions are used to read data from TCP and UDP sockets, respectively, and
their operation is otherwise identical.
The host MCU application calls the recv or recvfrom function with a pre allocated buffer. When the
SOCKET_MSG_RECV or SOCKET_MSG_RECVFROM event callback arrives, this buffer must have the
received data.
The received data size indicates the status as follows:
• Positive – data is received
• Zero – socket connection is terminated
• Negative – indicates an error
In the case of TCP sockets, it is recommended to call the recv function after each successful socket
connection (client or server). Otherwise, the received data is buffered in the ATWINC15x0 firmware
wasting the system's resources until the socket is explicitly closed using a close function call.
6.2.3.11 close
The close function is used to release the resources allocated to the socket and, for a TCP stream
socket, also terminate an open connection.
Each call to the socket function must match with a call to the close function. In addition, sockets that
are accepted on a server socket port must be closed using this function.
6.2.3.12 setsockopt
The setsockopt function may be used to set socket options to control the socket behavior.
The options supported are as follows:
• SO_SET_UDP_SEND_CALLBACK – enables or disables the send /sendto event callbacks. The
user may want to disable the sendto event callback for UDP sockets to enhance the socket
connection throughput.
• IP_ADD_MEMBERSHIP – enables subscribe to an IP Multicast address.
• IP_DROP_MEMBERSHIP – enables unsubscribe to an IP Multicast address.
• SOL_SSL_SOCKET – sets SSL Socket. The following are the options supported for SSL socket:
– SO_SSL_BYPASS_X509_VERIF command allows opening of the SSL socket to bypass the
X509 certification verification process.
Example:
struct sockaddr_in addr_in;
int optVal =1;
addr_in.sin_family = AF_INET;
addr_in.sin_port = _htons(MAIN_HOST_PORT);
addr_in.sin_addr.s_addr = gu32HostIp;
/* Create secure socket */
if (tcp_client_socket < 0) {
tcp_client_socket = socket(AF_INET, SOCK_STREAM,
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SOCKET_FLAGS_SSL);
}
/* Check if socket was created successfully */
if (tcp_client_socket == -1) {
printf("socket error.\r\n");
close(tcp_client_socket);
return -1;
}
/* Enable X509 bypass verification */
setsockopt(tcp_client_socket,
SOL_SSL_SOCKET,SO_SSL_BYPASS_X509_VERIF,&optVal,sizeof(optVal));
/* If success, connect to socket */
if (connect(tcp_client_socket, (struct sockaddr
*)&addr_in,
sizeof(struct sockaddr_in)) !=
SOCK_ERR_NO_ERROR) {
printf("connect error.\r\n");
return SOCK_ERR_INVALID;
}
– SO_SSL_SNI command sets the Server Name Indicator (SNI). During TLS handshake
process, client can indicate which hostname it is trying to connect by setting Server Name in
(extended) client hello. SNI allows a server to present multiple certificates on the same IP
address and TCP port number and hence allows multiple secure websites to be served by the
same IP address without requiring all of the websites to use the same certificate.
– SO_SSL_ENABLE_SNI_VALIDATION enables SNI validation functionality in case SNI is set.
The server name validation is disabled by default. To enable server name validation, both
SO_SSL_SNI and SO_SSL_ENABLE_SNI_VALIDATION must be set by the application
through setsockopt() as shown in the example code snippet. When the SNI validation is
enabled, the SNI is compared with the common name (CN) in the received server certificate.
If the supplied SNI does not match the CN, the SSL connection will be forcibly closed by the
ATWINC15x0 firmware.
Example:
#define MAIN_HOST_NAME "www.google.com"
struct sockaddr_in addr_in;
int optVal =1;
addr_in.sin_family = AF_INET;
addr_in.sin_port = _htons(MAIN_HOST_PORT);
addr_in.sin_addr.s_addr = gu32HostIp;
/* Create secure socket */
if (tcp_client_socket < 0) {
tcp_client_socket = socket(AF_INET, SOCK_STREAM,
SOCKET_FLAGS_SSL);
}
/* Check if socket was created successfully */
if (tcp_client_socket == -1) {
printf("socket error.\r\n");
close(tcp_client_socket);
return -1;
}
/* set SNI on SSL Socket */
setsockopt(tcp_client_socket,
SOL_SSL_SOCKET,SO_SSL_SNI,
MAIN_HOST_NAME,sizeof(MAIN_HOST_NAME));
/* Enable SSL SNI validation */
setsockopt(tcp_client_socket, SOL_SSL_SOCKET,
SO_SSL_ENABLE_SNI_VALIDATION,&optVal,sizeof(optVal));
/* If success, connect to socket */
if (connect(tcp_client_socket, (struct sockaddr
*)&addr_in, sizeof(
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 44
struct sockaddr_in)) != SOCK_ERR_NO_ERROR) {
printf("connect error.\r\n");
return SOCK_ERR_INVALID;
}
– SO_SSL_ENABLE_SESSION_CACHING command allows the TLS to cache the session
information to speed up the future TLS session establishment.
Example:
struct sockaddr_in addr_in;
int optVal =1;
addr_in.sin_family = AF_INET;
addr_in.sin_port = _htons(MAIN_HOST_PORT);
addr_in.sin_addr.s_addr = gu32HostIp;
/* Create secure socket */
if (tcp_client_socket < 0) {
tcp_client_socket = socket(AF_INET, SOCK_STREAM,
SOCKET_FLAGS_SSL);
}
/* Check if socket was created successfully */
if (tcp_client_socket == -1) {
printf("socket error.\r\n");
close(tcp_client_socket);
return -1;
}
/* Enable SSL Session cache */
setsockopt(tcp_client_socket,
SOL_SSL_SOCKET,SO_SSL_ENABLE_SESSION_CACHING,&optVal,sizeof(optVal));
/* If success, connect to socket */
if (connect(tcp_client_socket, (struct sockaddr
*)&addr_in, sizeof(struct
sockaddr_in)) != SOCK_ERR_NO_ERROR) {
printf("connect error.\r\n");
return SOCK_ERR_INVALID;
}
WARNING SO_SSL_BYPASS_X509_VERIF is only provided for debugging and testing purposes. It is NOT
recommended to use this socket option in production software applications.
6.2.3.13 gethostbyname
The gethostbyname function is used to resolve a host name (for example, URL) to a host IP address
via the Domain Name System (DNS). This is limited only to IPv4 addresses. The operation depends on
the configuration of a DNS server IP address and access to the DNS hierarchy through the internet.
After gethostbyname is called, a callback to the DNS resolver handler is made. If the IP address is
determined, a positive value is returned. If it cannot be determined or if the DNS server is not accessible
(30-second time-out), an IP address value of zero is indicated.
Note: An IP returns a zero value to indicate an error (for example, the internet connection is down or
DNS is unavailable) and the host MCU application may try the function call gethostbyname again later.
6.2.4 Summary
The following table summarizes the ATWINC15x0 socket API and shows its compatibility with BSD socket
APIs.
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 45
Table 6-1. ATWINC15x0 Socket API Summary
BSD API ATWINC15x0
API
ATWINC15x0
API Type
Server/
Client
TCP/UD
P
Brief
socket socket Synchronous Both Both Creates a new socket.
connect connect Asynchronous Client TCP Initializes a TCP
connection request to a
remote server.
bind bind Asynchronous Server Both Binds a socket to an
address (address/port).
listen listen Asynchronous Server TCP Allows a bound socket
to listen to remote
connections for its local
port.
accept accept Deprecated, Implicit accept in listen.
send send Asynchronous Both Both Sends packet.
sendto sendto Asynchronous Both UDP Sends packet over UDP
sockets.
write - Not supported
recv recv Asynchronous Both Both Receives packet.
recvfrom recvfrom Asynchronous Both Both Receives packet.
read - Not supported
close close Synchronous Both Both Terminates the TCP
connection and release
system resources.
gethostbyname gethostbyname Asynchronous Both Both Gets the IP address of a
certain host name
gethostbyaddr - Not supported
select - Not supported
poll - Not supported
setsockopt setsockopt Synchronous Both Both Sets socket option.
getsockopt Not supported
htons/ntohs _htons/_ntohs Synchronous Both Both Converts 2 byte integer
from the host
representation to the
Network byte order
representation (and vice
versa).
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 46
...........continued
BSD API ATWINC15x0
API
ATWINC15x0
API Type
Server/
Client
TCP/UD
P
Brief
htonl/ntohl21 _htonl/_ntohl Synchronous Both Both Converts 4 byte integer
from the host
representation to the
Network byte order
representation (and vice
versa).
6.3 Socket Connection Flow
In the following sub-sections, the TCP and UDP (client and server) operations are described in details.
Figure 6-3. Typical Socket Connection Flow
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 47
6.3.1 TCP Client Operation
The following figure shows the flow for transferring data with a TCP client.
Figure 6-4. TCP Client Sequence Diagram
Note:
1. The host application must register a socket notification callback function. The function must be of
tpfAppSocketCb type and must handle socket event notifications appropriately.
2. If the client knows the IP of the server, it may call connect directly as shown in the figure above. If
only the server URL is known, then the application must resolve the server URL first calling the
gethostbyname API.
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 48
6.3.2 TCP Server Operation
Figure 6-5. TCP Server Sequence Diagram
Note: The host application must register a socket notification callback function. The function must be of
type tpfAppSocketCb and must handle socket event notifications appropriately.
6.3.3 UDP Client Operation
The following figure shows the flow for transferring data with a UDP client.
Figure 6-6. UDP Client Sequence Diagram
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 49
Note:
1. The first send message must be performed with the sendto API with the destination address
specified.
2. If further messages are sent to the same address, the send API can also be used. For more
details, refer to send.
3. recv can be used instead of recvfrom.
6.3.4 UDP Server Operation
The following figure shows the flow for transferring data after establishing a UDP server.
Figure 6-7. UDP Server Sequence Diagram
6.3.5 DNS Host Name Resolution
The following figure shows the flow of DNS host name resolution.
Figure 6-8. DNS Resolution Sequence
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 50
Note:
1. The host application requests to resolve hostname (for example, http://www.foobar.com), by calling
the function gethostbyname.
2. Before calling the gethostbyname, the application must register a DNS response callback
function using the function registerSocketCallback.
3. After the ATWINC15x0 DNS_Resolver module obtains the IP Address (hostIP) corresponding to
the given HostName, the dnsResolveCB is called with the hostIP.
4. If an error occurs or if the DNS request encounters a time-out, the dnsResolveCB is called with IP
Address value zero indicating a failure to resolve the domain name.
6.4 Example Code
This section provides code examples for different socket applications. For additional socket code
examples, refer to the Wi-Fi Network Controller Software Programming Guide.
6.4.1 TCP Client Example Code
SOCKET clientSocketHdl;
uint8 rxBuffer[256];
/* Socket event handler. */
void tcpClientSocketEventHandler(SOCKET sock, uint8 u8Msg, void * pvMsg)
{
if(sock == clientSocketHdl)
{
if(u8Msg == SOCKET_MSG_CONNECT)
{
// Connect Event Handler.
tstrSocketConnectMsg *pstrConnect = (tstrSocketConnectMsg*)pvMsg;
if(pstrConnect->s8Error == 0)
{
// Perform data exchange.
uint8 acSendBuffer[256];
uint16 u16MsgSize;
// Fill in the acSendBuffer with some data here
// send data
send(clientSocketHdl, acSendBuffer, u16MsgSize, 0);
// Recv response from server.
recv(clientSocketHdl, rxBuffer, sizeof(rxBuffer), 0);
}
else
{
printf("TCP Connection Failed\n");
}
}
else if(u8Msg == SOCKET_MSG_RECV)
{
tstrSocketRecvMsg *pstrRecvMsg = (tstrSocketRecvMsg*)pvMsg;
if((pstrRecvMsg->pu8Buffer != NULL) && (pstrRecvMsg->s16BufferSize > 0))
{
// Process the received message.
// Close the socket.
close(clientSocketHdl);
}
}
}
}
// This is the DNS callback. The response of gethostbyname is here.
void dnsResolveCallback(uint8* pu8HostName, uint32 u32ServerIP)
{
struct sockaddr_in strAddr;
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 51
if(u32ServerIP != 0)
{
clientSocketHdl = socket(AF_INET,SOCK_STREAM,u8Flags);
if(clientSocketHdl >= 0)
{
strAddr.sin_family = AF_INET;
strAddr.sin_port = _htons(443);
strAddr.sin_addr.s_addr = u32ServerIP;
connect(clientSocketHdl, (struct sockaddr*)&strAddr, sizeof(struct sockaddr_in));
}
}
else
{
printf("DNS Resolution Failed\n");
}
}
/* This function needs to be called from main function. For the callbacks to be invoked
correctly, the API m2m_wifi_handle_events should be called continuously from main. */
void tcpConnect(char *pcServerURL)
{
// Initialize the socket layer.
socketInit();
// Register socket application callbacks.
registerSocketCallback(tcpClientSocketEventHandler, dnsResolveCallback);
// Resolve Server URL.
gethostbyname((uint8*)pcServerURL);
}
6.4.2 TCP Server Example Code
SOCKET listenSocketHdl, acceptedSocketHdl;
uint8 rxBuffer[256];
uint8 bIsfinished = 0;
/* Socket event handler. */
void tcpServerSocketEventHandler(SOCKET sock, uint8 u8Msg, void * pvMsg)
{
if(u8Msg == SOCKET_MSG_BIND)
{
tstrSocketBindMsg *pstrBind = (tstrSocketBindMsg*)pvMsg;
if(pstrBind->status == 0)
{
listen(listenSocketHdl, 0);
}
else
{
printf("Bind Failed\n");
}
}
else if(u8Msg == SOCKET_MSG_LISTEN)
{
tstrSocketListenMsg *pstrListen = (tstrSocketListenMsg*)pvMsg;
if(pstrListen->status != 0)
{
printf("listen Failed\n");
}
}
else if(u8Msg == SOCKET_MSG_ACCEPT)
{
// New Socket is accepted.
tstrSocketAcceptMsg *pstrAccept = (tstrSocketAcceptMsg *)pvMsg;
if(pstrAccept->sock >= 0)
{
// Get the accepted socket.
acceptedSocketHdl = pstrAccept->sock;
recv(acceptedSocketHdl, rxBuffer, sizeof(rxBuffer), 0);
}
else
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 52
{
printf("Accept Failed\n");
}
}
else if(u8Msg == SOCKET_MSG_RECV)
{
tstrSocketRecvMsg *pstrRecvMsg = (tstrSocketRecvMsg*)pvMsg;
if((pstrRecvMsg->pu8Buffer != NULL) && (pstrRecvMsg->s16BufferSize > 0))
{
// Process the received message
// Perform data exchange
uint8 acSendBuffer[256];
uint16 u16MsgSize;
// Fill in the acSendBuffer with some data here
// Send some data.
send(acceptedSocketHdl, acSendBuffer, u16MsgSize, 0);
// Recv response from client.
recv(acceptedSocketHdl, rxBuffer, sizeof(rxBuffer), 0);
// Close the socket when finished.
if(bIsfinished)
{
close(acceptedSocketHdl);
close(listenSocketHdl);
}
}
}
}
/* This function needs to be called from main function. For the callbacks to be invoked
correctly, the API m2m_wifi_handle_events should be called continuously from main. */
void tcpStartServer(uint16 u16ServerPort)
{
struct sockaddr_in strAddr;
// Initialize the socket layer.
socketInit();
// Register socket application callbacks.
registerSocketCallback(tcpServerSocketEventHandler, NULL);
// Create the server listen socket.
listenSocketHdl = socket(AF_INET, SOCK_STREAM, 0);
if(listenSocketHdl >= 0)
{
strAddr.sin_family = AF_INET;
strAddr.sin_port = _htons(u16ServerPort);
strAddr.sin_addr.s_addr = 0; //INADDR_ANY
bind(listenSocketHdl, (struct sockaddr*)&strAddr, sizeof(struct sockaddr_in));
}
}
6.4.3 UDP Client Example Code
SOCKET clientSocketHdl;
uint8 rxBuffer[256], acSendBuffer[256];
/* Socket event handler */
void udpClientSocketEventHandler(SOCKET sock, uint8 u8Msg, void * pvMsg)
{
if((u8Msg == SOCKET_MSG_RECV) || (u8Msg == SOCKET_MSG_RECVFROM))
{
tstrSocketRecvMsg *pstrRecvMsg = (tstrSocketRecvMsg*)pvMsg;
if((pstrRecvMsg->pu8Buffer != NULL) && (pstrRecvMsg->s16BufferSize > 0))
{
uint16 len;
// Format a message in the acSendBuffer and put its length in len
sendto(clientSocketHdl, acSendBuffer, len, 0,
(struct sockaddr*)&strAddr, sizeof(struct sockaddr_in));
recvfrom(clientSocketHdl, rxBuffer, sizeof(rxBuffer), 0);
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 53
// Close the socket after finished
close(clientSocketHdl);
}
}
}
/* This function needs to be called from main function. For the callbacks to be invoked
correctly, the API m2m_wifi_handle_events should be called continuously from main.*/
void udpClientStart(char *pcServerIP)
{
struct sockaddr_in strAddr;
// Initialize the socket layer.
socketInit();
// Register socket application callbacks.
registerSocketCallback(udpClientSocketEventHandler, NULL);
clientSocketHdl = socket(AF_INET,SOCK_STREAM,u8Flags);
if(clientSocketHdl >= 0)
{
uint16 len;
strAddr.sin_family = AF_INET;
strAddr.sin_port = _htons(1234);
strAddr.sin_addr.s_addr = nmi_inet_addr(pcServerIP);
// Format some message in the acSendBuffer and put its length in len
sendto(clientSocketHdl, acSendBuffer, len, 0, (struct sockaddr*)&strAddr,
sizeof(struct sockaddr_in));
recvfrom(clientSocketHdl, rxBuffer, sizeof(rxBuffer), 0);
}
}
6.4.4 UDP Server Example Code
SOCKET serverSocketHdl;
uint8 rxBuffer[256];
/* Socket event handler.*/
void udpServerSocketEventHandler(SOCKET sock, uint8 u8Msg, void * pvMsg)
{
if(u8Msg == SOCKET_MSG_BIND)
{
tstrSocketBindMsg *pstrBind = (tstrSocketBindMsg*)pvMsg;
if(pstrBind->status == 0)
{
// call Recv
recvfrom(serverSocketHdl, rxBuffer, sizeof(rxBuffer), 0);
}
else
{
printf("Bind Failed\n");
}
}
else if(u8Msg == SOCKET_MSG_RECV)
{
tstrSocketRecvMsg *pstrRecvMsg = (tstrSocketRecvMsg*)pvMsg;
if((pstrRecvMsg->pu8Buffer != NULL) && (pstrRecvMsg->s16BufferSize > 0))
{
// Perform data exchange.
uint8 acSendBuffer[256];
uint16 u16MsgSize;
// Fill in the acSendBuffer with some data
// Send some data to the same address.
sendto(acceptedSocketHdl, acSendBuffer, u16MsgSize, 0,
pstrRecvMsg-> strRemoteAddr, sizeof(pstrRecvMsg-> strRemoteAddr));
// call Recv
recvfrom(serverSocketHdl, rxBuffer, sizeof(rxBuffer), 0);
// Close the socket when finished.
close(serverSocketHdl);
}
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 54
}
}
/* This function needs to be called from main function. For the callbacks to be invoked
correctly, the API m2m_wifi_handle_events should be called continuously from main.
*/
void udpStartServer(uint16 u16ServerPort)
{
struct sockaddr_in strAddr;
// Initialize the socket layer.
socketInit();
// Register socket application callbacks.
registerSocketCallback(udpServerSocketEventHandler, NULL);
// Create the server listen socket.
listenSocketHdl = socket(AF_INET, SOCK_DGRAM, 0);
if(listenSocketHdl >= 0)
{
strAddr.sin_family = AF_INET;
strAddr.sin_port = _htons(u16ServerPort);
strAddr.sin_addr.s_addr = 0; //INADDR_ANY
bind(serverSocketHdl, (struct sockaddr*)&strAddr, sizeof(struct sockaddr_in));
}
}
ATWINC15x0
Socket Programming
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 55
7. Transport Layer Security (TLS)
Transport Layer Security (TLS) layer sits on top of TCP and provides security services including privacy,
authenticity, and message integrity. Various security methods are available with TLS in the WINC
firmware.
7.1 TLS Overview
The ATWINC15x0 features an embedded low-memory footprint TLS protocol stack bundled within the
WINC firmware.
It features the following functionality:
• Supports TLS versions TLS1.0, TLS1.1 and TLS1.2.
• Supports TLS client operation with TLS client authentication.
• Supports TLS Server mode.
• A simple application interface to the TLS stack. The TLS functionality is abstracted by the
ATWINC15x0 socket interface, hiding the implementation complexity from the application developer
and minimizing the effort to port existing plain TCP code to TLS.
7.2 TLS Connection Establishment
From the application’s point of view, the TLS functionality is wrapped behind the socket APIs. This hides
the complexity of TLS from the application which can use the TLS in the same way as the TCP (non-TLS)
client and server. The main difference between the TLS sockets and the regular TCP sockets is that the
application sets the SOCKET_FLAGS_SSL while creating the TLS client and server listening sockets. The
detailed sequence of TLS connection establishment is described in the following figure.
Note:
• For proper TLS Client operation, ensure that both SOCKET_FLAGS_SSL flag and the correct port
number is set in the TLS client application. For instance, an HTTP client application uses no flag
when calling socket API function and connect to port 80. The same application source code
becomes an HTTPS client application if you use the flag SOCKET_FLAGS_SSL and change the port
number in connect API to port 433.
• For proper TLS server operation, ensure that both SOCKET_FLAGS_SSL flag and the correct port
number is set in the TLS server application. For instance, an HTTP server application uses no flag
when calling socket API function and bind to port 80. The same application source code
becomes an HTTPS server application, if you use the flag SOCKET_FLAGS_SSL and change the
port number in bind API to port 443.
ATWINC15x0
Transport Layer Security (TLS)
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 56
Figure 7-1. TLS Client Application Connection Establishment
ATWINC15x0
Transport Layer Security (TLS)
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 57
Figure 7-2. TLS Server Application Connection Establishment
7.3 Server Certificate Installation
7.3.1 Technical Background
7.3.1.1 Public Key Infrastructure
The TLS security is based on the Public Key Infrastructure PKI, in which:
• A server has its public key stored in a digital certificate with X.509 standard format.
• The server must have its X.509 certificate issued by Certificate Authority (CA) which in turn may be
certified by another CA.
ATWINC15x0
Transport Layer Security (TLS)
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 58
• This structure forms a chain of X.509 certificates known as chain of trust.
• The top most CA of the Chain is known to be the Trusted Root Certificate Authority of the chain.
7.3.1.2 TLS Server Authentication
• When a TLS client initiates a connection with a server, the server sends its X.509 certificate chain
(may or may not include the root certificate) to the client.
• The client must authenticate the Server (verify the Server identity) before starting data exchange.
• The client must verify the entire certificate chain and also verify that the root certificate authority of
the chain is in the client’s trusted root certificate store.
7.3.2 Adding a Certificate to the WINC Trusted Root Certificate Store
• Before connecting to a TLS Server, the root certificate of the server must be installed on the
ATWINC15x0. If this is not done, the TLS connection to the server is locally aborted by the WINC.
• The root certificate must be in DER format. If it is not provided in DER format, it must be converted
before installation. Refer to Section 17 “How to Generate Certificates” for certificate formats and
conversion methods.
• To install the certificate, execute root_certificate_downloader.exe with the following syntax:
root_certificate_downloader.exe -n N File1.cer File2.cer .... FileN.cer
7.4 WINC TLS Limitations
7.4.1 Concurrent Connections
Only 2 TLS concurrent connections are allowed.
7.4.2 TLS Supported Ciphers
The ATWINC15x0 supports the following cipher suites (for both client and server modes).
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA
• TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
• TLS_RSA_WITH_AES_128_CBC_SHA
• TLS_RSA_WITH_AES_128_CBC_SHA256
The ATWINC15x0 also optionally support the following ECC cipher suites.
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA
• TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
• TLS_ECDHE_ ECDSA _WITH_AES_128_CBC_SHA256
7.4.3 Supported Hash Algorithms
The current implementation (WINC firmware version 19.5.2 onwards) supports the following hash
algorithms:
• MD5
• SHA-1
• SHA256
• SHA384
• SHA512
• RSA 4096
ATWINC15x0
Transport Layer Security (TLS)
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 59
7.4.4 TLS Certificate Constraints
For TLS server and TLS client authentication, the ATWINC15x0 can accept the following certificate types:
• RSA certificates with key size no more than 2048 bits
• ECDSA certificates only for NIST P256 EC Curve (secp256r1); conditionally supported
7.4.5 ECC Cipher Suite
The ATWINC15x0 TLS library features support of ECC cipher suites. Although, the ATWINC15x0 device
does not contain a built-in hardware accelerator for ECC math, the WINC TLS library leverages the ECC
math from the host MCU. To perform the ECC computations needed by the ECC ciphers, an ECC
hardware accelerator (or software library) on the host MCU is mandatory.
The WINC TLS initializes with the ECC cipher suites disabled by default. The host MCU application can
enable the ciphers via the API sslSetActiveCipherSuites.
7.5 SSL Client Code Example
SOCKET sslSocketHdl;
uint8 rxBuffer[256];
/* Socket event handler. */
void SSL_SocketEventHandler(SOCKET sock, uint8 u8Msg, void * pvMsg)
{
if(sock == sslSocketHdl)
{
if(u8Msg == SOCKET_MSG_CONNECT)
{
// Connect event
tstrSocketConnectMsg *pstrConnect = (tstrSocketConnectMsg*)pvMsg;
if(pstrConnect->s8Error == 0)
{
// Perform data exchange.
uint8 acSendBuffer[256];
uint16 u16MsgSize;
// Fill in the acSendBuffer with some data here
// Send some data.
send(sock, acSendBuffer, u16MsgSize, 0);
// Recv response from server.
recv(sslSocketHdl, rxBuffer, sizeof(rxBuffer), 0);
}
else
{
printf("SSL Connection Failed\n");
}
}
else if(u8Msg == SOCKET_MSG_RECV)
{
tstrSocketRecvMsg *pstrRecvMsg = (tstrSocketRecvMsg*)pvMsg;
if((pstrRecvMsg->pu8Buffer != NULL) && (pstrRecvMsg->s16BufferSize > 0))
{
// Process the received message here
// Close the socket if finished.
close(sslSocketHdl);
}
}
}
}
/* This is the DNS callback. The response of gethostbyname is here. */
void dnsResolveCallback(uint8* pu8HostName, uint32 u32ServerIP)
{
struct sockaddr_in strAddr;
if(u32ServerIP != 0)
{
ATWINC15x0
Transport Layer Security (TLS)
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 60
sslSocketHdl = socket(AF_INET,SOCK_STREAM,u8Flags);
if(sslSocketHdl >= 0)
{
strAddr.sin_family = AF_INET;
strAddr.sin_port = _htons(443);
strAddr.sin_addr.s_addr = u32ServerIP;
connect(sslSocketHdl, (struct sockaddr*)&strAddr, sizeof(struct sockaddr_in));
}
}
else
{
printf("DNS Resolution Failed\n");
}
}
/* This function needs to be called from main function. For the callbacks to be invoked
correctly, the API m2m_wifi_handle_events should be called continuously from main.*/
void SSL_Connect(char *pcServerURL)
{
// Initialize the socket layer.
socketInit();
// Register socket application callbacks.
registerSocketCallback(SSL_SocketEventHandler, dnsResolveCallback);
// Resolve Server URL.
gethostbyname((uint8*)pcServerURL);
}
ATWINC15x0
Transport Layer Security (TLS)
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 61
8. Wi-Fi AP Mode
8.1 Overview
This chapter provides an overview of the WINC Access Point (AP) mode and describes how to setup this
mode and configure its parameters.
In ATWINC1500 v19.6.1 firmware and above, the DHCP default gateway, DNS server and subnet mask
can be customized when entering AP and provisioning modes. Earlier, the default gateway and DNS
server is the same as the host IP of the WINC and the subnet mask is 255.255.255.0. Configuring these
values allow the use of 0.0.0.0 for the default gateway and DNS server, allowing mobile devices to
connect to the WINC AP without disconnecting from the mobile network. Using IPs other than 0.0.0.0 is
possible but it is of no use since only one device can connect to the WINC AP at any time.
8.2 Setting the WINC AP Mode
Set the WINC AP mode configuration parameters using the tstrM2MAPConfig structure.
There are two functions to enable/disable the WINC AP mode:
• sint8 m2m_wifi_enable_ap (CONST tstrM2MAPConfig* pstrM2MAPConfig)
• sint8 m2m_wifi_disable_ap (void)
For more details on API, refer to the Atmel Software Framework for ATWINC1500 (Wi-Fi).
In ATWINC1500 v19.6.1 firmware and above, to maintain backwards compatibility with older drivers, new
structures and APIs were introduced.
To customize these fields when entering AP or provisioning mode the tstrM2MAPModeConfig structure
must be populated and passed to the new m2m_wifi_enable_ap_ext() or
m2m_wifi_start_provision_mode_ext() APIs. The tstrM2MAPModeConfig structure contains
the original tstrM2MAPConfig structure for storing the AP SSID, password, and so on. and another
tstrM2MAPConfigExt structure for configuring the default router, DNS server and subnet mask.
8.3 Limitations
• The AP can only support a single associated station. Further connection attempts are rejected.
• The ATWINC15x0 supports WPA2 security feature starting from the firmware version 19.5.x.
• Concurrency (simultaneous STA and AP mode) is not supported. Prior to activating the AP mode,
the host MCU application must disable the mode that is currently running.
8.4 Sequence Diagram
Once AP mode is established, data interface does not exist before a station associates to the AP;
therefore, the application needs to wait until it receives a notification via an event callback. This process
is shown in the following figure.
ATWINC15x0
Wi-Fi AP Mode
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 62
Figure 8-1. ATWINC15x0 AP Mode Establishment
8.5 AP Mode Code Example
The following example shows how to configure the ATWINC15x0 AP mode with WINC_SSID as
broadcasted SSID on channel one with open security and an IP address equals 192.168.1.1.
#include "m2m_wifi.h"
#include "m2m_types.h"
void wifi_event_cb(uint8 u8WiFiEvent, void * pvMsg)
{
switch(u8WiFiEvent)
{
case M2M_WIFI_REQ_DHCP_CONF:
{
uint8 *pu8IPAddress = (uint8*)pvMsg;
printf("Associated STA has IP Address \"%u.%u.%u.%u\"\n", pu8IPAddress[0],
pu8IPAddress[1], pu8IPAddress[2], pu8IPAddress[3]);
}
break;
default:
break;
}
}
int main()
{
tstrWifiInitParam param;
/* Platform specific initializations. */
ATWINC15x0
Wi-Fi AP Mode
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 63
param.pfAppWifiCb = wifi_event_cb;
if (!m2m_wifi_init(¶m))
{
tstrM2MAPConfig apConfig;
strcpy(apConfig.au8SSID, "WINC_SSID"); // Set SSID
apConfig.u8SsidHide = SSID_MODE_VISIBLE; // Set SSID to be broadcasted
apConfig.u8ListenChannel = 1; // Set Channel
apConfig.u8SecType = M2M_WIFI_SEC_WEP; // Set Security to WEP
apConfig.u8KeyIndx = 0; // Set WEP Key Index
apConfig.u8KeySz = WEP_40_KEY_STRING_SIZE; // Set WEP Key Size
strcpy(apConfig.au8WepKey, "1234567890"); // Set WEP Key
// IP Address
apConfig.au8DHCPServerIP[0] = 192;
apConfig.au8DHCPServerIP[1] = 168;
apConfig.au8DHCPServerIP[2] = 1;
apConfig.au8DHCPServerIP[3] = 1;
// Start AP mode
m2m_wifi_enable_ap(&apConfig);
while(1)
{
m2m_wifi_handle_events(NULL);
}
}
}
Note: Power Save mode is not supported in the ATWINC15x0 AP mode.
ATWINC15x0
Wi-Fi AP Mode
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 64
9. Provisioning
For normal operation the ATWINC15x0 device requires certain parameters to be loaded. In particular,
when operating in Station mode, it must know the identity (SSID) and credentials of the access point to
which it needs to connect. The entry of this information is facilitated through the following provisioning
steps.
The current ATWINC15x0 software supports the following methods of provisioning:
• HTTP-based (browser) provisioning, while the WINC is in AP mode
• Wi-Fi Protected Setup (WPS)
9.1 HTTP Provisioning
In this method, the ATWINC15x0 is placed in AP mode and another device with a browser capability
(mobile phone, tablet, PC, and so on) is instructed to connect to the ATWINC15x0 HTTP server. Once
connected, the desired configuration can be entered.
The HTTP Provisioning home page is as shown in the following figure.
Figure 9-1. ATWINC15x0 HTTP Provisioning Page
ATWINC15x0
Provisioning
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 65
9.1.1 Provisioning Control Flow
Figure 9-2. HTTP Provisioning Sequence Diagram
The preceding figure shows the provisioning operation for a WINC device. The detailed steps are
described as follows:
1. The WINC device starts the HTTP Provisioning mode.
2. A user with a smartphone finds the WINC AP SSID in the Wi-Fi search list.
3. The user connects to the WINC AP.
4. The user launches the web browser and writes the WINC home page in the address bar.
5. If the HTTP redirect bit (bEnableHttpRedirect) is set in m2m_wifi_start_provision_mode
API, then all http traffic (http://URL) from the associated device (Phone, PC, and so on) are
redirected to the WINC HTTP Provisioning home page. Some phones display a notification
message “sign in to Wi-Fi networks?” which, when accepted, automatically loads the WINC home
page. The WINC home page, as shown in Figure 10.1, appears on the browser.
6. To discover the list of Wi-Fi APs in the area, the user can press “Refresh”.
7. The desired AP is then selected from the search list (by one click or one touch) and its name
automatically appears in the “Network Name” text box.
ATWINC15x0
Provisioning
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 66
8. The user must then enter the correct AP passphrase (for WPA/WPA2 personal security) in the
“Pass Phrase” text box. If the desired AP uses open security, (M2M_WIFI_SEC_OPEN) then the
Pass Phrase field is left empty.
9. A WINC device name may be optionally configured, if desired, by the user in the “Device Name”
text box.
10. Then user should press Connect.
The WINC turns off AP mode and start connecting to the provisioned AP.
9.1.2 HTTP Redirect Feature
The ATWINC15x0 HTTP Provisioning server supports the HTTP redirect feature, which forces all HTTP
traffic originating from the associated user device to be redirected to the ATWINC15x0 Provisioning home
page.
This simplifies the mechanism of loading the provisioning page instead of typing the exact web address of
the HTTP Provisioning server.
To enable this feature, set the redirect flag when calling the API m2m_wifi_start_provision_mode.
For further details, refer to the following code example.
9.1.3 Provisioning Code Example
void wifi_event_cb(uint8 u8WiFiEvent, void * pvMsg)
{
if(u8WiFiEvent == M2M_WIFI_RESP_PROVISION_INFO)
{
tstrM2MProvisionInfo *provInfo = (tstrM2MProvisionInfo*)pvMsg;
if(provInfo->u8Status == M2M_SUCCESS)
{
// connect to the provisioned AP.
m2m_wifi_connect((char*)provInfo->au8SSID, strlen(provInfo ->au8SSID),
provInfo->u8SecType, provInfo->au8Password, M2M_WIFI_CH_ALL);
printf("PROV SSID : %s\n", provInfo->au8SSID);
printf("PROV PSK : %s\n", provInfo->au8Password);
}
else
{
printf("(ERR) Provisioning Failed\n");
}
}
}
int main()
{
tstrWifiInitParam param;
// Platform specific initializations.
// Driver initialization.
param.pfAppWifiCb = wifi_event_cb;
if(!m2m_wifi_init(¶m))
{
tstrM2MAPConfig apConfig;
uint8 bEnableRedirect = 1;
strcpy(apConfig.au8SSID, "WINC_AP");
apConfig.u8ListenChannel = 1;
apConfig.u8SecType = M2M_WIFI_SEC_OPEN;
apConfig.u8SsidHide = 0;
// IP Address
apConfig.au8DHCPServerIP[0] = 192;
apConfig.au8DHCPServerIP[1] = 168;
apConfig.au8DHCPServerIP[2] = 1;
apConfig.au8DHCPServerIP[0] = 1;
m2m_wifi_start_provision_mode(&apConfig, "atmelconfig.com", bEnableRedirect);
ATWINC15x0
Provisioning
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 67
while(1)
{
m2m_wifi_handle_events(NULL);
}
}
}
9.2 Limitations
The current implementation of the HTTP Provisioning has the following limitations:
• The ATWINC15x0 AP limitations are applicable to the Provisioning mode. For a list of AP mode
limitations, refer to Limitations.
• Provisioning uses AP mode with open security. No Wi-Fi security nor application level security (for
example, TLS) is used; therefore, the AP credentials entered by the user are sent on the clear and
can be seen by eavesdroppers.
• The WINC Provisioning home page is a static HTML page. No server-side scripting allowed in the
WINC HTTP server.
• Only APs with WPA-personal security (passphrase based) and no security (Open network) can be
provisioned. WEP and WPA-Enterprise APs cannot be provisioned.
• The Provisioning is responsible to deliver the connection parameters to the application, the
connection procedure and the connection parameters validity are the application's responsibility.
9.3 Wi-Fi Protected Setup (WPS)
Most modern Access Points support Wi-Fi Protected Setup method, typically using the push button
method. From the user’s perspective WPS is a simple mechanism to make a device connect securely to
an AP without remembering passwords or passphrases. WPS uses asymmetric cryptography to form a
temporary secure link which is then used to transfer a passphrase (and other information) from the AP to
the new station. After the transfer, secure connections are made as for normal static PSK configuration.
9.3.1 WPS Configuration Methods
There are two authentication methods that can be used with WPS:
1. PBC (push button) method – A physical button is pressed on the AP which puts the AP into WPS
mode for a limited period of time. WPS is initiated on the ATWINC15x0 by calling m2m_wifi_wps
with input parameter WPS_PBC_TRIGGER.
2. PIN method – The AP is always available for WPS initiation but requires proof that the user has
knowledge of an 8-digit PIN, usually printed on the body of the AP. Since the WINC is often used in
headless devices (no user interface), it is necessary to reverse this process and force the AP to use
a PIN number provided with the WINC device. Some APs allow the PIN to be changed through
configuration. WPS is initiated on the ATWINC15x0 by calling m2m_wifi_wps with input parameter
WPS_PIN_TRIGGER. Given the difficulty of this approach, it is not recommend for most
applications.
The flow of messages and actions for WPS operation is shown in the following figure.
ATWINC15x0
Provisioning
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 68
9.3.2 WPS Control Flow
Figure 9-3. WPS Operation for Push Button Trigger
9.3.3 WPS Limitations
• WPS is used to transfer the WPA/WPA2 key only; other security types are not supported.
• The WPS standard rejects the session (WPS response fail) if the WPS button is pressed on more
than one AP in the same proximity, and the application can try again after a couple of minutes.
• If no WPS button is pressed on the AP, the WPS scan will time-out after two minutes since the
initial WPS trigger.
• The WPS is responsible to deliver the connection parameters to the application, the connection
procedure and the connection parameters’ validity is the application's responsibility.
9.3.4 WPS Code Example
void wifi_event_cb(uint8 u8WiFiEvent, void * pvMsg)
{
if(u8WiFiEvent == M2M_WIFI_REQ_WPS)
{
tstrM2MWPSInfo *pstrWPS = (tstrM2MWPSInfo*)pvMsg;
if(pstrWPS->u8AuthType != 0)
{
printf("WPS SSID : %s\n",pstrWPS->au8SSID);
printf("WPS PSK : %s\n",pstrWPS->au8PSK);
printf("WPS SSID Auth Type : %s\n",
pstrWPS->u8AuthType == M2M_WIFI_SEC_OPEN ? "OPEN" : "WPA/WPA2");
printf("WPS Channel : %d\n",pstrWPS->u8Ch + 1);
// Establish Wi-Fi connection
m2m_wifi_connect((char*)pstrWPS->au8SSID, (uint8)m2m_strlen(pstrWPS->au8SSID),
pstrWPS->u8AuthType, pstrWPS->au8PSK, pstrWPS->u8Ch);
}
ATWINC15x0
Provisioning
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 69
else
{
printf("(ERR) WPS Is not enabled OR Timedout\n");
}
}
}
int main()
{
tstrWifiInitParam param;
// Platform specific initializations.
// Driver initialization.
param.pfAppWifiCb = wifi_event_cb;
if(!m2m_wifi_init(¶m))
{
// Trigger WPS in Push button mode.
m2m_wifi_wps(WPS_PBC_TRIGGER, NULL);
while(1)
{
m2m_wifi_handle_events(NULL);
}
}
}
ATWINC15x0
Provisioning
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 70
10. Over-The-Air Upgrade
10.1 Overview
The ATWINC15x0 supports OTA upgrade of firmware on internal serial Flash. No host Flash memory
resources are required to store the firmware. The ATWINC15x0 uses an internal HTTP client to retrieve
the firmware from a remote server.
10.2 OTA Image Architecture
The WINC serial Flash can store two copies of the firmware image: a working image and a rollback
image. Upon first-time boot, the working image is the factory image and the rollback image will not be
available in the WINC Flash. Instead ATE firmware will be available in rollback image firmware section.
On performing the OTA firmware upgrade, the ATE firmware will be erased and the newly received
firmware will be written into the Roll back image section. The WINC has insufficient internal memory to
save the whole image in RAM during an OTA upgrade; therefore, each block of downloaded data is
written to the Flash as it is received. In the event that the OTA fails, the existing (Working) image is
retained and the rollback image is invalidated. If the transfer succeeds, the Flash control structure is
updated to reflect a new working image and the existing image is marked as a valid rollback image.
Figure 10-1. OTA Image Organization
ATWINC15x0
Over-The-Air Upgrade
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 71
10.3 OTA Download Sequence Diagram
Figure 10-2. OTA Image Download and Install
10.4 OTA Firmware Rollback
Figure 10-3. OTA Image Rollback Sequence
ATWINC15x0
Over-The-Air Upgrade
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 72
10.5 OTA Limitations
• Rollback is allowed, only after at least one successful OTA download.
• Rollback image is overwritten by any new successful or failed OTA attempt.
10.6 OTA Code Example
/*! */
static void OtaUpdateCb(uint8 u8OtaUpdateStatusType ,uint8 u8OtaUpdateStatus)
{
if(u8OtaUpdateStatusType == DL_STATUS)
{
if(u8OtaUpdateStatus == OTA_STATUS_SUCSESS)
{
//switch to the upgraded firmware
m2m_ota_switch_firmware();
}
}
else if(u8OtaUpdateStatusType == SW_STATUS)
{
if(u8OtaUpdateStatus == OTA_STATUS_SUCSESS)
{
M2M_INFO("Now OTA suceesfully done");
//start the host SW upgrade then system reset is required (Reintilize the driver)
}
}
}
void wifi_event_cb(uint8 u8WiFiEvent, void * pvMsg)
{
case M2M_WIFI_REQ_DHCP_CONF:
{
//after suceesfull connection, start the over air upgrade
m2m_ota_start_update(OTA_URL);
}
break;
default:
break;
}
int main (void)
{
tstrWifiInitParam param;
tstr1xAuthCredentials gstrCred1x = AUTH_CREDENTIALS;
nm_bsp_init();
m2m_memset((uint8*)¶m, 0, sizeof(param));
param.pfAppWifiCb = wifi_event_cb;
//intilize the WINC Driver
ret = m2m_wifi_init(¶m);
if (M2M_SUCCESS != ret)
{
M2M_ERR("Driver Init Failed <%d>\n",ret);
while(1);
}
//intilize the ota module
m2m_ota_init(OtaUpdateCb,NULL);
//connect to AP that provide connection to the OTA server
m2m_wifi_default_connect();
while(1)
{
while(m2m_wifi_handle_events(NULL) != M2M_SUCCESS) {}
}
}
Note: For more details on example codes, refer to the Wi-Fi Network Controller Software Programming
Guide.
ATWINC15x0
Over-The-Air Upgrade
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 73
11. Multicast Sockets
11.1 Overview
The purpose of the multicast filters is to provide the ability to send/receive messages to/from multicast
addresses. This feature is useful for one-to-many communication over networks, whether it’s intended to
send Internet Protocol (IP) datagrams to a group of interested receivers in a single transmission,
participate in a zero-configuration networking or listening to a multicast stream or any other application.
11.2 How to Use Filters
Whenever the application wishes to use a multicast IP address, for either sending or receiving, a filter is
needed. The application can establish this through setting the IP_ADD_MEMBERSHIP option for the
required socket accompanied by the multicast address that the application wants to use. If subsequently
the host wants to stop receiving the multicast stream, set the IP_DROP_MEMBERSHIP option for the
required socket accompanied with the multicast address.
Adding or removing a multicast address filter causes the WINC chip firmware to add/remove both MAC
layer filter and IP layer filter in order to pass or prevent messages from reaching to the host.
11.3 Multicast Socket Code Example
To illustrate the functionality, a simple example is implemented where the host application responds to
mDNS (Multicast Domain Name System) queries sent from a computer/mobile application. The computer/
mobile is looking for devices which support the zero configuration service as indicated by an mDNS
response. The WINC responds, notifying its presence and its capability of sending and receiving multicast
messages.
The example consists of a UDP server that binds on port 5353 (mDNS port) and waits for messages,
parsing them and replying with a previously saved response message.
• Server Initialization:
void MDNS_ServerInit()
{
tstrSockAddr strAddr ;
unsigned int MULTICAST_IP = 0xE00000FB; //224.0.0.251
socketInit();
dns_server_sock = socket( AF_INET, SOCK_DGRAM,0);
MDNS_INFO("DNS_server_init \n");
setsockopt(dns_server_sock,1,IP_ADD_MEMBERSHIP,&MULTICAST_IP,sizeof(MULTICAST_IP));
strAddr.u16Port =HTONS(MDNS_SERVER_PORT);
bind(dns_server_sock,(struct sockaddr*)&strAddr,sizeof(strAddr));
registerSocketCallback(UDP_SocketEventHandler,AppServerCb);
}
• Sockets Events Handler:
void MDNS_RecvfromCB(signed char sock,unsigned char *pu8RxBuffer,signed short s16DataSize,
unsigned char *pu8IPAddr,unsigned short u16Port,void *pvArg)
{
MDNS_INFO("DnsServer_RecvfromCB \n");
if((pu8RxBuffer != 0) && (s16DataSize > 0))
{
tstrDnsHdr strDnsHdr;
strdnsquery;
MDNS_INFO("DNS Packet Recieved \n");
ATWINC15x0
Multicast Sockets
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 74
if(MDNS_ParseQuery(&pu8RxBuffer[0], &strDnsHdr,&strDnsQuery))
MDNS_SendResp (sock,pu8IPAddr, u16Port,&strDnsHdr,&strDnsQuery );
}
else
{
MDNS_INFO("DnsServer_RecvfromCB Error !\n");
}
}
• Server Socket Callback:
void MDNS_RecvfromCB(signed char sock,unsigned char *pu8RxBuffer,signed short
s16DataSize,unsigned char *pu8IPAddr,unsigned short u16Port,void *pvArg)
{
MDNS_INFO("DnsServer_RecvfromCB \n");
if((pu8RxBuffer != 0) && (s16DataSize > 0))
{
tstrDnsHdr strDnsHdr ;
strdnsquery ;
MDNS_INFO("DNS Packet Recieved \n");
if(MDNS_ParseQuery(&pu8RxBuffer[0], &strDnsHdr,&strDnsQuery))
MDNS_SendResp (sock,pu8IPAddr, u16Port,&strDnsHdr,&strDnsQuery );
}
else
{
MDNS_INFO("DnsServer_RecvfromCB Error !\n");
}
}
• Parse mDNS Query:
int MDNS_ParseQuery(unsigned char * pu8RxBuffer, tstrDnsHdr *pstrDnsHdr, strdnsquery
*pstrDnsQuery )
{
unsigned char dot_size,temp=0;
unsigned short n=0,i=0,u16index=0;
int bDNSmatch = 0;
/* ----Identification--------------------------|QR| Opcode |AA|TC|RD|RA|Z|AD|CD|
Rcode | */
/* ----Total Questions------------------------|-----------------Total Answer
RRs---------------*/
/* ----Total Authority RRs --------------------|----------------Total Additional
RRs------------*/
/* --------------------------------- Questions
--------------------------------- */
/* ------------------------------------ Answer RRs
------------------------------------------*/
/* ----------------------------------- Authority RRs
----------------------------------*/
/* -----------------------------------Additional RRs
----------------------------------*/
MDNS_INFO("Parsing DNS Packet\n");
pstrDnsHdr->id = (( pu8RxBuffer[u16index]<<8)| (pu8RxBuffer[u16index+1]));
MDNS_INFO ("id = %.4x \n",pstrDnsHdr->id);
u16index+=2;
pstrDnsHdr->flags1= pu8RxBuffer[u16index++];
pstrDnsHdr->flags2= pu8RxBuffer[u16index++];
MDNS_INFO ("flags = %.2x %.2x \n",pstrDnsHdr->flags1,pstrDnsHdr->flags2);
pstrDnsHdr->numquestions = ((pu8RxBuffer[u16index]<<8)| (pu8RxBuffer[u16index+1]));
MDNS_INFO ("numquestions = %.4x \n",pstrDnsHdr->numquestions);
u16index+=2;
pstrDnsHdr->numanswers = ((pu8RxBuffer[u16index]<<8)| (pu8RxBuffer[u16index+1]));
MDNS_INFO ("numanswers = %.4x \n",pstrDnsHdr->numanswers);
u16index+=2;
pstrDnsHdr->numauthrr = ((pu8RxBuffer[u16index]<<8)| (pu8RxBuffer[u16index+1]));
MDNS_INFO ("numauthrr = %.4x \n",pstrDnsHdr->numauthrr);
u16index+=2;
pstrDnsHdr->numextrarr = ((pu8RxBuffer[u16index]<<8)| (pu8RxBuffer[u16index+1]));
MDNS_INFO ("numextrarr = %.4x \n",pstrDnsHdr->numextrarr);
u16index+=2;
dot_size =pstrDnsQuery->query[n++]= pu8RxBuffer[u16index++];
pstrDnsQuery->u16size=1;
ATWINC15x0
Multicast Sockets
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 75
while (dot_size--!=0) //(pu8RxBuffer[++u16index] != 0)
{
pstrDnsQuery->query[n++]=pstrDnsQuery->queryForChecking[i++]=pu8RxBuffer[u16index++] ;
pstrDnsQuery->u16size++;
gu8pos=temp;
if (dot_size == 0 )
{
pstrDnsQuery->queryForChecking[i++]= '.' ;
temp=u16index;
dot_size =pstrDnsQuery->query[n++]= pu8RxBuffer[u16index++];
pstrDnsQuery->u16size++;
}
}
pstrDnsQuery->queryForChecking[--i] = 0;
MDNS_INFO("parsed query <%s>\n",pstrDnsQuery->queryForChecking);
// Search for any match in the local DNS table.
for(n = 0; n < DNS_SERVER_CACHE_SIZE; n++)
{
MDNS_INFO("Saved URL <%s>\n",gpacDnsServerCache[n]);
if(strcmp(gpacDnsServerCache[n], pstrDnsQuery->queryForChecking) ==0)
{
bDNSmatch= 1;
MDNS_INFO("MATCH \n");
}
else
{
MDNS_INFO("Mismatch\n");
}
}
pstrDnsQuery->u16class = ((pu8RxBuffer[u16index]<<8)| (pu8RxBuffer[u16index+1]));
u16index+=2;
pstrDnsQuery->u16type= ((pu8RxBuffer[u16index]<<8)| (pu8RxBuffer[u16index+1]));
return bDNSmatch;
}
• Send mDNS Response:
void MDNS_SendResp (signed char sock,unsigned char * pu8IPAddr,
unsigned short u16Port,tstrDnsHdr *pstrDnsHdr,strdnsquery *pstrDnsQuery)
{
unsigned short u16index=0;
tstrSockAddr strclientAddr ;
unsigned char * pu8sendBuf;
char * serviceName2 = (char*)malloc(sizeof(serviceName)+1);
unsigned int MULTICAST_IP = 0xFB0000E0;
pu8sendBuf= gPu8Buf;
memcpy(&strclientAddr.u32IPAddr,&MULTICAST_IP,IPV4_DATA_LENGTH);
strclientAddr.u16Port=u16Port;
MDNS_INFO("%s \n",pstrDnsQuery->query);
MDNS_INFO("Query Size = %d \n",pstrDnsQuery->u16size);
MDNS_INFO("class = %.4x \n",pstrDnsQuery->u16class);
MDNS_INFO("type = %.4x \n",pstrDnsQuery->u16type);
MDNS_INFO("PREPARING DNS ANSWER BEFORE SENDING\n");
/*----------------------------ID 2 Bytes -----------------------------*/
pu8sendBuf [u16index++] =0; //( pstrDnsHdr->id>>8);
pu8sendBuf [u16index++] = 0;//( pstrDnsHdr->id)&(0xFF);
MDNS_INFO ("(ResPonse) id = %.2x %.2x \n",
pu8sendBuf[u16index-2],pu8sendBuf[u16index-1]);
/*----------------------------Flags 2 Bytes----------------------------*/
pu8sendBuf [u16index++] = DNS_RSP_FLAG_1;
pu8sendBuf [u16index++] = DNS_RSP_FLAG_2;
MDNS_INFO ("(ResPonse) Flags = %.2x %.2x \n",
pu8sendBuf[u16index-2],pu8sendBuf[u16index-1]);
/*----------------------------No of Questions--------------------------*/
pu8sendBuf [u16index++] =0x00;
pu8sendBuf [u16index++] =0x01;
MDNS_INFO ("(ResPonse) Questions = %.2x %.2x \n",
pu8sendBuf[u16index-2],pu8sendBuf[u16index-1]);
/*---------------------------No of Answers----------------------------*/
pu8sendBuf [u16index++] =0x00;
pu8sendBuf [u16index++] =0x01;
MDNS_INFO ("(ResPonse) Answers = %.2x %.2x \n",
pu8sendBuf[u16index-2],pu8sendBuf[u16index-1]);
ATWINC15x0
Multicast Sockets
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 76
/*---------------------------No of Authority RRs------------------------*/
pu8sendBuf [u16index++] =0x00;
pu8sendBuf [u16index++] =0x00;
MDNS_INFO ("(ResPonse) Authority RRs = %.2x %.2x \n",
pu8sendBuf[u16index-2],pu8sendBuf[u16index-1]);
/*----------------------------No of Additional RRs----------------------*/
pu8sendBuf [u16index++] =0x00;
pu8sendBuf [u16index++] =0x00;
MDNS_INFO ("(ResPonse) Additional RRs = %.2x %.2x \n",
pu8sendBuf[u16index-2],pu8sendBuf[u16index-1]);
/*--------------------------------Query-----------------------------*/
memcpy(&pu8sendBuf[u16index],pstrDnsQuery->query,pstrDnsQuery->u16size);
MDNS_INFO("\nsize = %d \n",pstrDnsQuery->u16size);
u16index+=pstrDnsQuery->u16size;
/*-------------------------------Query Type----------------------------*/
pu8sendBuf [u16index++] = ( pstrDnsQuery->u16type>>8);//MDNS_TYPE>>8;
pu8sendBuf [u16index++] = ( pstrDnsQuery->u16type)&(0xFF);//(MDNS_TYPE&0xFF);
MDNS_INFO ("Query Type = %.2x %.2x \n", pu8sendBuf[u16index-2],pu8sendBuf[u16index-1]);
/*------------------------------Query Class-----------------------------------*/
pu8sendBuf [u16index++] =MDNS_CLASS>>8;//(( pstrDnsQuery->u16class>>8)|0x80);
pu8sendBuf [u16index++] = (MDNS_CLASS & 0xFF);//( pstrDnsQuery->u16class)&(0xFF);
MDNS_INFO ("Query Class = %.2x %.2x \n", pu8sendBuf[u16index-2],pu8sendBuf[u16index-1]);
/*########################Answers#########################*/
/*------------------------------Name---------------------------------*/
pu8sendBuf [u16index++]= 0xC0 ; //pointer to query name location
pu8sendBuf [u16index++]= 0x0C ; // instead of writing the whole query name again
/*-----------------------------Type----------------------------------*/
pu8sendBuf [u16index++] =MDNS_TYPE>>8; //Type 12 PTR (domain name Pointer).
pu8sendBuf [u16index++] =(MDNS_TYPE&0xFF);
/*------------------------------Class-----------------------------------*/
pu8sendBuf [u16index++] =0x00;//MDNS_CLASS; //Class IN, Internet.
pu8sendBuf [u16index++] =0x01;// (MDNS_CLASS & 0xFF);
/*-----------------------------TTL----------------------------------*/
pu8sendBuf [u16index++] =(TIME_TO_LIVE >>24);
pu8sendBuf [u16index++] =(TIME_TO_LIVE >>16);
pu8sendBuf [u16index++] =(TIME_TO_LIVE >>8);
pu8sendBuf [u16index++] =(TIME_TO_LIVE );
/*---------------------------Date Length----------------------------------*/
pu8sendBuf [u16index++] =(sizeof(serviceName)+2)>>8;//added 2 bytes for the pointer
pu8sendBuf [u16index++] =(sizeof(serviceName)+2);
/*-----------------------------DATA--------------------------------*/
convertServiceName(serviceName,sizeof(serviceName),serviceName2);
memcpy(&pu8sendBuf[u16index],serviceName2,sizeof(serviceName)+1);
u16index+=sizeof(serviceName);
pu8sendBuf [u16index++] =0xC0;//Pointer to .local (from name)
pu8sendBuf [u16index++] =gu8pos;//23
/*###########################################################*/
strclientAddr.u16Port=HTONS(MDNS_SERVER_PORT);
// MultiCast RESPONSE
sendto( sock, pu8sendBuf,(uint16)u16index,0,(struct
sockaddr*)&strclientAddr,sizeof(strclientAddr));
strclientAddr.u16Port=u16Port;
memcpy(&strclientAddr.u32IPAddr,pu8IPAddr,IPV4_DATA_LENGTH);
}
• Service Name:
static char gpacDnsServerCache[DNS_SERVER_CACHE_SIZE][MDNS_HOSTNAME_SIZE] =
{
"_services._dns-sd._udp.local","_workstation._tcp.local","_http._tcp.local"
};
unsigned char gPu8Buf [MDNS_BUF_SIZE];
unsigned char gu8pos ;
signed char dns_server_sock ;
#define serviceName "_ATMELWIFI._tcp"
ATWINC15x0
Multicast Sockets
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 77
12. WINC Serial Flash Memory
12.1 Overview and Features
The WINC has internal serial (SPI) Flash memory of 4 Mb capacity in the ATWINC1500 and 8 Mb
capacity in the ATWINC1510. The Flash memory is used to store:
• User configuration
• Firmware
• Connection Profiles
During start-up and mode changes, firmware is loaded from the serial Flash into program memory (IRAM)
in which the firmware is executed. The Flash is accessed at other points during run time to retrieve
configuration and profile data.
A minimum of 4 Mb Flash is required for OTA feature in order to store both working and rollback images.
The Flash memory can be read, written and erased directly from the host without co-operation with the
WINC firmware. However, if operational firmware is already loaded, it is necessary to halt any running
WINC firmware first before accessing the serial Flash to avoid access conflict between the host and the
WINC processor.
12.2 Accessing to Serial Flash
• The host has transparent access to the serial (SPI) Flash through the WINC SPI Master.
• The host can program the serial (SPI) Flash without the need for operational firmware in the WINC.
The function m2m_wifi_download_mode must be called first.
Figure 12-1. System Block Diagram showing SPI Flash Connection
12.3 Read/Write/Erase Operations
SPI Flash can be accessed to be read, written and erased.
It is required to change the WINC’s mode to Download mode first before attempting to access the SPI
Flash by calling:
sint32 m2m_wifi_download_mode();
ATWINC15x0
WINC Serial Flash Memory
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 78
All SPI Flash functions are blocking. A return of M2M_SUCCESS indicates that the requested operation is
successfully completed.
The following is a list of Flash functions that may be used:
• Query the size of the SPI Flash:
uint32 spi_flash_get_size();
This function returns with the size of the SPI Flash in Mb.
• Read data from the SPI Flash:
sint8 spi_flash_read(uint8 *pu8Buf, uint32 u32offset, uint32 u32Sz)
Where the size of data is limited by the SPI Flash size.
• Erase sectors in the SPI Flash:
sint8 spi_flash_erase(uint32 u32Offset, uint32 u32Sz)
Note: The size is limited by the SPI Flash size.
Prior to writing to any sector, erase this sector first. If some data needs to be changed within a sector, it is
advised to read the sector first, modify the data and then erase and write the whole sector again.
• Write data to the SPI Flash:
sint8 spi_flash_write(uint8* pu8Buf, uint32 u32Offset, uint32 u32Sz)
If the application wants to write any number of bytes within any sector, it has to erase the entire sector
first. It may be necessary to read the entire sector, erase the sector and then write back with
modifications. It is also recommended to verify that data is written after it returns success by reading data
again and compare it with the original.
12.3.1 Flash Read, Erase, and Write Code Examples
#include "spi_flash.h"
#define DATA_TO_REPLACE "THIS IS A NEW SECTOR IN FLASH"
int main()
{
uint8 au8FlashContent[FLASH_SECTOR_SZ] = {0};
uint32u32FlashTotalSize = 0, u32FlashOffset = 0;
// Platform specific initializations.
ret = m2m_wifi_download_mode();
if(M2M_SUCCESS != ret)
{
printf("Unable to enter download mode\r\n");
}
else
{
u32FlashTotalSize = spi_flash_get_size();
}
while((u32FlashTotalSize > u32FlashOffset) && (M2M_SUCCESS == ret))
{
ret = spi_flash_read(au8FlashContent, u32FlashOffset, FLASH_SECTOR_SZ);
if(M2M_SUCCESS != ret)
{
printf("Unable to read SPI sector\r\n");
break;
}
memcpy(au8FlashContent, DATA_TO_REPLACE, strlen(DATA_TO_REPLACE));
ATWINC15x0
WINC Serial Flash Memory
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 79
ret = spi_flash_erase(u32FlashOffset, FLASH_SECTOR_SZ);
if(M2M_SUCCESS != ret)
{
printf("Unable to erase SPI sector\r\n");
break;
}
ret = spi_flash_write(au8FlashContent, u32FlashOffset, FLASH_SECTOR_SZ);
if(M2M_SUCCESS != ret)
{
printf("Unable to write SPI sector\r\n");
break;
}
u32FlashOffset += FLASH_SECTOR_SZ;
}
if(M2M_SUCCESS == ret)
{
printf("Successful operations\r\n");
}
else
{
printf("Failed operations\r\n");
}
while(1);
return M2M_SUCCESS;
}
ATWINC15x0
WINC Serial Flash Memory
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 80
13. Host Interface (HIF) Protocol
Communication between the user application and the WINC device is facilitated by the driver software.
This driver implements the Host Interface (HIF) Protocol and exposes an API to the application with
various services. The services are broadly divided in two categories: Wi-Fi device control and IP Socket.
The Wi-Fi device control services allow actions such as channel scanning, network identification,
connection and disconnection. The Socket services allow data transfer once a connection is established
and similar to BSD socket definitions.
The host driver implements services asynchronously. This means that when the application calls an API
to request a service action, the call is non-blocking and returns immediately, often before the action is
completed. Where appropriate a notification that an action has completed is provided in a subsequent
message from the WINC device to the host which is delivered to the application via a callback function. In
general, the WINC firmware uses asynchronous events to signal the host driver of certain status
changes. Asynchronous operation is essential where functions (such as Wi-Fi connection) may take
significant time.
When an API is called, a sequence of layers is activated to format the request and arranging to transfer it
to the WINC device through the serial protocol.
Note: Dealing with HIF messages in the host MCU application is an advanced topic. For most
applications, it is recommended to use Wi-Fi and socket layers. Both layers hide the complexity of the HIF
APIs.
After the application sends request, the Host Driver (Wi-Fi/Socket layer) formats the request and sends it
to the HIF layer which then interrupts the WINC device to notify that a new request is posted. Upon
receipt, the WINC firmware parses the request and starts the required operation.
Figure 13-1. WINC Driver Layers
The Host Interface Layer is responsible for handling communication between the host MCU and the
WINC device. This includes interrupt handling, DMA control and management of the communication logic
between the firmware driver in the host and the WINC firmware.
The Request/Response sequence between the host and the WINC chip is shown in the following figure.
ATWINC15x0
Host Interface (HIF) Protocol
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 81
Figure 13-2. The Request/Response Sequence Diagram
13.1 Transfer Sequence Between the HIF Layer and the WINC Firmware
The following section shows the individual steps taken during a HIF frame transmit (HIF message to the
WINC) and a HIF frame receive (HIF message from the WINC).
13.1.1 Frame Transmit
The following figure shows the steps and states involved in sending a message from the host to the
WINC device.
Figure 13-3. HIF Frame Transmit to WINC
ATWINC15x0
Host Interface (HIF) Protocol
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 82
Table 13-1. Steps in HIF Frame Transmit to WINC
Step Description
Step (1) Wake up the
WINC device
Wake up the device to be able to receive the host requests.
Step (2) Interrupt the
WINC device
Prepare and set the HIF layer header to NMI_STATE_REG register (4 bytes
header describing the sent packet).
Set BIT [1] of WIFI_HOST_RCV_CTRL_2 register to raise an interrupt to the
WINC chip.
Step (3) Poll for DMA
address
Wait until the WINC chip clears BIT [1] of WIFI_HOST_RCV_CTRL_2
register.
Get the DMA address (for the allocated memory) from register 0x150400.
Step (4) Write data Write the data blocks in sequence, the HIF header then the Control buffer (if
any) then the Data buffer (if any).
Step (5) TX Done
Interrupt
Send a notification that writing the data is completed by setting BIT [1] of
WIFI_HOST_RCV_CTRL_3 register.
Step (6) Allow the WINC
device to Sleep
Allow the WINC device to enter Sleep mode again (if it wishes).
13.1.2 Frame Receive
The following figure shows the steps and states involved in sending a message from the WINC device to
the host.
Figure 13-4. HIF Frame Receive from WINC to Host
Table 13-2. Steps in HIF Frame Receive from WINC to Host
Step Description
Step (1) Wake up the
WINC device
Wake up the device to be able to receive host requests.
Step (2) Check for
Interrupt
Monitor BIT [0] of WIFI_HOST_RCV_CTRL_0 register.
Disable the host from receiving interrupts (until this interrupt is processed).
Step (3) Clear interrupt Write zero to BIT [0] of WIFI_HOST_RCV_CTRL_0 register.
ATWINC15x0
Host Interface (HIF) Protocol
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 83
...........continued
Step Description
Step (4) Read data Get the address of the data block from WIFI_HOST_RCV_CTRL_1 register.
Read data block with size obtained from WIFI_HOST_RCV_CTRL_0 register
BIT [13] <-> BIT [2].
Step (5) Process
Request
Parse the HIF header at the start of the data and forward the data to the
appropriate registered Callback function.
Step (6) HOST RX Done Raise an interrupt for the chip to free the memory holding the data by setting
BIT [1] of WIFI_HOST_RCV_CTRL_0 register.
Enable host interrupt reception again.
Step (7) Allow the WINC
device to Sleep
Allow the WINC device to enter Sleep mode again (if it wishes).
13.2 HIF Message Header Structure
The HIF message is the data structure exchanged back and forth between the Host Interface and the
WINC firmware. The HIF message header structure consists of three fields:
• The Group ID (8-bit) – a group ID is the category of the message. Valid categories are enumerated
in tenuM2mReqGroup.
• Op Code (8-bit) – is a command number. Valid command number is a value enumerated in:
tenuM2mConfigCmd and tenuM2mStaCmd, tenuM2mApCmd, and tenuM2mP2pCmd
corresponding to configuration, STA mode, AP mode, and P2P mode commands.
Note:
• Refer to the m2m_types.h for the full list of commands.
• The P2P mode is not supported after release v19.5.3.
• Payload Length (16-bit) – the payload length is shown in bytes (does not include header).
13.3 HIF Layer APIs
The interface between the application and the driver is done at the higher layer API interface (Wi-Fi /
Socket.) As explained previously, the driver upper layer uses a lower layer API to access the services of
the Host Interface Protocol. This section describes the Host Interface APIs that the upper layers use:
The following API functions are described:
ATWINC15x0
Host Interface (HIF) Protocol
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 84
• hif_chip_wake
• hif_chip_sleep
• hif_register_cb
• hif_isr
• hif_receive
• hif_send
• hif_set_sleep_mode
• hif_get_sleep_mode
For all functions, the return value is either M2M_SUCCESS (zero) in case of success or a negative value in
case of failure.
• sint8 hif_chip_wake (void) – this function wakes the WINC chip from Sleep mode using
clockless register access. It sets bit '1' of register 0x01 and sets the value of WAKE_REG register
to WAKE_VALUE.
• sint8 hif_chip_sleep (void) – this function enables Sleep mode for the WINC chip by setting
the WAKE_REG register to a value of SLEEP_VALUE and clearing bit '1' of register 0x01.
• sint8 hif_register_cb (uint8 u8Grp, tpfHifCallBack fn) – this function sets the callback
function for different components (for example, M2M_WIFI, M2M_HIF, M2M_OTA and so on.). A
callback is registered by upper layers to receive specific events of a specific message group.
• sint8 hif_isr (void) – this is the host interface interrupt service routine. It handles interrupts
generated by the WINC chip and parses the HIF header to call back the appropriate handler.
• sint8 hif_receive (uint32 u32Addr, uint8 *pu8Buf, uint16 u16Sz, uint8 is Done) – this function
causes the host driver to read data from the WINC chip. The location and length of the data must
be known in advance and specified. This is typically extracted from an earlier part of a transaction.
• sint8 hif_send (uint8 u8Gid, uint8 u8Opcode, uint8 *pu8CtrlBuf, uint16 u16CtrlBufSize, uint8
*pu8DataBuf, uint16 u16DataSize, uint16 16DataOffset) – this function causes the host driver to
send data to the WINC chip. The WINC chip must be prepared for reception according to the flow
described in the previous section.
• void hif_set_sleep_mode (uint8 u8Pstype) – this function is used to set the Sleep mode of the
HIF layer.
• uint8 hif_get_sleep_mode (void) – this function return the Sleep mode of the HIF layer.
13.4 Scan Code Example
The following code example illustrates the Request/Response flow on a Wi-Fi Scan request.
Note: For more details on example codes, refer to the Wi-Fi Network Controller Software Programming
Guide.
• The application requests a Wi-Fi scan.
{
m2m_wifi_request_scan(M2M_WIFI_CH_ALL);
}
• The host driver Wi-Fi layer formats the request and forward it to HIF (Host Interface) layer.
sint8 m2m_wifi_request_scan(uint8 ch)
{
tstrM2MScan strtmp;
sint8 s8Ret = M2M_ERR_SCAN_IN_PROGRESS;
ATWINC15x0
Host Interface (HIF) Protocol
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 85
strtmp.u8ChNum = ch;
s8Ret = hif_send(M2M_REQ_GRP_WIFI, M2M_WIFI_REQ_SCAN, (uint8*)&strtmp,
sizeof(tstrM2MScan),NULL, 0,0);
return s8Ret;
}
• The HIF layer sends the request to the WINC chip.
sint8 hif_send(uint8 u8Gid,uint8 u8Opcode,uint8 *pu8CtrlBuf,uint16 u16CtrlBufSize,
uint8 *pu8DataBuf,uint16 u16DataSize, uint16 u16DataOffset)
{
sint8 ret = M2M_ERR_SEND;
volatile tstrHifHdr strHif;
strHif.u8Opcode = u8Opcode&(~NBIT7);
strHif.u8Gid = u8Gid;
strHif.u16Length = M2M_HIF_HDR_OFFSET;
if(pu8DataBuf != NULL)
{
strHif.u16Length += u16DataOffset + u16DataSize;
}
else
{
strHif.u16Length += u16CtrlBufSize;
}
/* TX STEP (1) */
ret = hif_chip_wake();
if(ret == M2M_SUCCESS)
{
volatile uint32 reg, dma_addr = 0;
volatile uint16 cnt = 0;
reg = 0UL;
reg |= (uint32)u8Gid;
reg |= ((uint32)u8Opcode<<8);
reg |= ((uint32)strHif.u16Length<<16);
ret = nm_write_reg(NMI_STATE_REG,reg);
if(M2M_SUCCESS != ret) goto ERR1;
reg = 0;
/* TX STEP (2) */
reg |= (1<<1);
ret = nm_write_reg(WIFI_HOST_RCV_CTRL_2, reg);
if(M2M_SUCCESS != ret) goto ERR1;
dma_addr = 0;
for(cnt = 0; cnt < 1000; cnt ++)
{
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_2,(uint32 *)®);
if(ret != M2M_SUCCESS) break;
if (!(reg & 0x2))
{
/* TX STEP (3) */
ret = nm_read_reg_with_ret(0x150400,(uint32 *)&dma_addr);
if(ret != M2M_SUCCESS) {
/*in case of read error clear the dma address and return error*/
dma_addr = 0;
}
/*in case of success break */
break;
}
}
if (dma_addr != 0)
{
volatile uint32 u32CurrAddr;
u32CurrAddr = dma_addr;
strHif.u16Length=NM_BSP_B_L_16(strHif.u16Length);
/* TX STEP (4) */
ret = nm_write_block(u32CurrAddr, (uint8*)&strHif, M2M_HIF_HDR_OFFSET);
if(M2M_SUCCESS != ret) goto ERR1;
u32CurrAddr += M2M_HIF_HDR_OFFSET;
if(pu8CtrlBuf != NULL)
{
ret = nm_write_block(u32CurrAddr, pu8CtrlBuf, u16CtrlBufSize);
if(M2M_SUCCESS != ret) goto ERR1;
u32CurrAddr += u16CtrlBufSize;
}
ATWINC15x0
Host Interface (HIF) Protocol
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 86
if(pu8DataBuf != NULL)
{
u32CurrAddr += (u16DataOffset - u16CtrlBufSize);
ret = nm_write_block(u32CurrAddr, pu8DataBuf, u16DataSize);
if(M2M_SUCCESS != ret) goto ERR1;
u32CurrAddr += u16DataSize;
}
reg = dma_addr << 2;
reg |= (1 << 1);
/* TX STEP (5) */
ret = nm_write_reg(WIFI_HOST_RCV_CTRL_3, reg);
if(M2M_SUCCESS != ret) goto ERR1;
}
else
{
/* ERROR STATE */
M2M_DBG("Failed to alloc rx size\r");
ret = M2M_ERR_MEM_ALLOC;
goto ERR1;
}
}
else
{
M2M_ERR("(HIF)Fail to wakup the chip\n");
goto ERR1;
}
/* TX STEP (6) */
ret = hif_chip_sleep();
ERR1:
return ret;
}
• The WINC chip processes the request and interrupts the host after finishing the operation.
• The HIF layer then receives the response.
static sint8 hif_isr(void)
{
sint8 ret = M2M_ERR_BUS_FAIL;
uint32 reg;
volatile tstrHifHdr strHif;
/* RX STEP (1) */
ret = hif_chip_wake();
if(ret == M2M_SUCCESS)
{
/* RX STEP (2) */
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_0, ®);
if(M2M_SUCCESS == ret)
{
/* New interrupt has been received */
if(reg & 0x1)
{
uint16 size;
nm_bsp_interrupt_ctrl(0);
/*Clearing RX interrupt*/
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_0,®);
if(ret != M2M_SUCCESS)goto ERR1;
reg &= ~(1<<0);
/* RX STEP (3) */
ret=nm_write_reg(WIFI_HOST_RCV_CTRL_0,reg);
if(ret != M2M_SUCCESS)goto ERR1;
/* read the rx size */
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_0, ®);
if(M2M_SUCCESS != ret)
{
M2M_ERR("(hif) WIFI_HOST_RCV_CTRL_0 bus fail\n");
nm_bsp_interrupt_ctrl(1);
goto ERR1;
}
gu8HifSizeDone = 0;
size = (uint16)((reg >> 2) & 0xfff);
if (size > 0)
{
uint32 address = 0;
/** start bus transfer **/
ATWINC15x0
Host Interface (HIF) Protocol
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 87
/* RX STEP (4) */
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_1, &address);
if(M2M_SUCCESS != ret)
{
M2M_ERR("(hif) WIFI_HOST_RCV_CTRL_1 bus fail\n");
nm_bsp_interrupt_ctrl(1);
goto ERR1;
}
ret = nm_read_block(address, (uint8*)&strHif, sizeof(tstrHifHdr));
strHif.u16Length = NM_BSP_B_L_16(strHif.u16Length);
if(M2M_SUCCESS != ret)
{
M2M_ERR("(hif) address bus fail\n");
nm_bsp_interrupt_ctrl(1);
goto ERR1;
}
if(strHif.u16Length != size)
{
if((size - strHif.u16Length) > 4)
{
M2M_ERR("(hif) Corrupted packet Size = %u \n",
size, strHif.u16Length, strHif.u8Gid, strHif.u8Opcode);
nm_bsp_interrupt_ctrl(1);
ret = M2M_ERR_BUS_FAIL;
goto ERR1;
}
}
/* RX STEP (5) */
if(M2M_REQ_GRP_WIFI == strHif.u8Gid)
{
if(pfWifiCb)
{
pfWifiCb(strHif.u8Opcode,strHif.u16Length - M2M_HIF_HDR_OFFSET,
address + M2M_HIF_HDR_OFFSET);
}
}
else if(M2M_REQ_GRP_IP == strHif.u8Gid)
{
if(pfIpCb)
{
pfIpCb(strHif.u8Opcode,strHif.u16Length - M2M_HIF_HDR_OFFSET,
address + M2M_HIF_HDR_OFFSET);
}
}
else if(M2M_REQ_GRP_OTA == strHif.u8Gid)
{
if(pfOtaCb)
{
pfOtaCb(strHif.u8Opcode,strHif.u16Length - M2M_HIF_HDR_OFFSET,
address + M2M_HIF_HDR_OFFSET);
}
}
else
{
M2M_ERR("(hif) invalid group ID\n");
ret = M2M_ERR_BUS_FAIL;
goto ERR1;
}
/* RX STEP (6) */
if(!gu8HifSizeDone)
{
M2M_ERR("(hif) host app didn't set RX Done\n");
ret = hif_set_rx_done();
}
}
else
{
ret = M2M_ERR_RCV;
M2M_ERR("(hif) Wrong Size\n");
goto ERR1;
}
}
else
ATWINC15x0
Host Interface (HIF) Protocol
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 88
{
#ifndef WIN32
M2M_ERR("(hif) False interrupt %lx",reg);
#endif
}
}
else
{
M2M_ERR("(hif) Fail to Read interrupt reg\n");
goto ERR1;
}
}
else
{
M2M_ERR("(hif) FAIL to wakeup the chip\n");
goto ERR1;
}
/* RX STEP (7) */
ret = hif_chip_sleep();
ERR1:
return ret;
}
• The appropriate handler in the Wi-Fi layer (called from the HIF layer).
static void m2m_wifi_cb(uint8 u8OpCode, uint16 u16DataSize, uint32 u32Addr)
{ // …code eliminated…
else if (u8OpCode == M2M_WIFI_RESP_SCAN_DONE)
{
tstrM2mScanDone strState;
gu8scanInProgress = 0;
if(hif_receive(u32Addr, (uint8*)&strState, sizeof(tstrM2mScanDone), 0) == M2M_SUCCESS)
{
gu8ChNum = strState.u8NumofCh;
if (gpfAppWifiCb)
gpfAppWifiCb(M2M_WIFI_RESP_SCAN_DONE, &strState);
}
}
// …code eliminated…
}
• The Wi-Fi layer sends the response to the application through its callback function.
if (u8MsgType == M2M_WIFI_RESP_SCAN_DONE)
{
tstrM2mScanDone *pstrInfo = (tstrM2mScanDone*) pvMsg;
if( (gu8IsWiFiConnected == M2M_WIFI_DISCONNECTED) &&
(gu8WPS == WPS_DISABLED) && (gu8Prov == PROV_DISABLED) )
{
gu8Index = 0;
gu8Sleep = PS_WAKE;
if (pstrInfo->u8NumofCh >= 1)
{
m2m_wifi_req_scan_result(gu8Index);
gu8Index++;
}
else
{
m2m_wifi_request_scan(M2M_WIFI_CH_ALL);
}
}
}
ATWINC15x0
Host Interface (HIF) Protocol
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 89
14. WINC SPI Protocol
The WINC main interface is SPI. The WINC device employs a protocol to allow exchange of formatted
binary messages between the WINC firmware and the host MCU application. The WINC protocol uses
raw bytes exchanged on the SPI bus to form high level structures like requests and callbacks.
The WINC SPI protocol consists of three layers:
• Layer 1 – the WINC SPI Slave protocol, which allows the host MCU application to perform register/
memory read and write operation in the ATWINC15x0 device using raw SPI data exchange.
• Layer 2 – the host MCU application uses the register and memory read and write capabilities to
exchange the host interface frames with the WINC firmware. It also provides asynchronous
callback from the WINC firmware to the host MCU through interrupts and the host interface RX
frames. For more information on this layer, refer to Section 15 “Host Interface (HIF) Protocol”.
• Layer 3 – allows the host MCU application to exchange high level messages (for example, Wi-Fi
scan, socket connection, or TCP data received) with the WINC firmware to employ in the host MCU
application logic.
Figure 14-1. WINC SPI Protocol Layers
14.1 Introduction
The WINC SPI Protocol is implemented as a command-response transaction and assumes one party is
the Master and the other is the Slave. The roles correspond to the Master and Slave devices on the SPI
bus. Each message has an identifier in the first byte indicating the type of message:
• Command
• Response
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• Data
In the case of Command and Data messages, the last byte is used as data integrity check.
The format of Command and Response and Data frames are described in the following sections. The
following points apply:
• There is a response for each command.
• Transmitted/received data is divided into packets with fixed size.
• For a WR transaction (Slave is receiving data packets), the Slave sends a response for each data
packet.
• For a RD transaction (Master is receiving data packets), the Master does not send a response. If
there is an error, the Master requests a retransmission on the lost data packet.
• Protection of commands and data packets by CRC is optional.
14.1.1 Command Format
The following frame format is used for commands where the host supports a DMA address of three bytes.
The first byte contains two fields:
• The CMD/Data Start field indicates that this is a Command frame.
• The CMD type field specifies the command to be executed.
The CMD type may be one of 15 commands:
• DMA write
• DMA read
• Internal register write
• Internal register read
• Transaction termination
• Repeat data packet
• DMA extended write
• DMA extended read
• DMA single-word write
• DMA single-word read
• Soft Reset
The Payload field contains command specific data and its length depends on the CMD type.
The CRC field is optional and generally computed in software.
The Payload field can be one of four types each having a different length:
• A: Three bytes
• B: Five bytes
• C: Six bytes
• D: Seven bytes
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WINC SPI Protocol
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Type A commands include:
• DMA single-word RD
• internal register RD
• Transaction termination command
• Repeat data PKT command
• Soft Reset command
Type B commands include:
• DMA RD Transaction
• DMA WR Transaction
Type C commands include:
• DMA Extended RD transaction
• DMA Extended WR transaction
• Internal register WR
Type D commands include:
• DMA single-word WR
Full details of the frame format fields are provided in the following table:
Table 14-1. Frame Format Fields
Field Size Description
CMD Start 4 bits Command Start: 4’b1100
CMD Type 4 bits Command type:
4’b0001: DMA write transaction
4’b0010: DMA read transaction
4’b0011: Internal register write
4’b0100: Internal register read
4’b0101: Transaction termination
4’b0110: Repeat data Packet
command
4’b0111: DMA extended write
transaction
4’b1000: DMA extended read
transaction
4’b1001: DMA single-word write
4’b1010: DMA single-word read
4’b1111: Soft Reset command
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...........continued
Field Size Description
Payload A: 3 The Payload field may be of Type
A, B, C, or D
Type A (length 3)
1- DMA single-word RD
Param: Read Address:
Payload bytes:
B0: ADDRESS[23:16]
B1: ADDRESS[15:8]
B2: ADDRESS[7:0]
2- internal register RD
Param: Offset address (two
bytes):
Payload bytes:
B0: OFFSET-ADDR[15:8]
B1: OFFSET-ADDR[7:0]
B2: 0
3- Transaction termination
command
Param: none
Payload bytes:
B0: 0
B1: 0
B2: 0
4- Repeat Data PKT command
Param: none
Payload bytes:
B0: 0
B1: 0
B2: 0
5- Soft Reset command
Param: none
Payload bytes:
B0: 0xFF
B1: 0xFF
B2: 0xFF
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...........continued
Field Size Description
Payload B: 5 Type B (length 5)
1- DMA RD Transaction
Params:
DMA Start Address: 3 bytes
DMA count: 2 bytes
Payload bytes:
B0: ADDRESS[23:16]
B1: ADDRESS[15:8]
B2: ADDRESS[7:0]
B3: COUNT[15:8]
B4: COUNT[7:0]
2- DMA WR Transaction
Params:
DMA Start Address: 3 bytes
DMA count: 2 bytes
Payload bytes:
B0: ADDRESS[23:16]
B1: ADDRESS[15:8]
B2: ADDRESS[7:0]
B3: COUNT[15:8]
B4: COUNT[7:0]
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...........continued
Field Size Description
Payload C: 6 Type C (length 6)
1- DMA Extended RD
transaction
Params:
DMA Start Address: 3 bytes
DMA extended count: 3 bytes
Payload bytes:
B0: ADDRESS[23:16]
B1: ADDRESS[15:8]
B2: ADDRESS[7:0]
B3: COUNT[23:16]
B4: COUNT[15:8]
B5: COUNT[7:0]
2- DMA Extended WR
transaction
Params:
DMA Start Address: 3 bytes
DMA extended count: 3 bytes
Payload bytes:
B0: ADDRESS[23:16]
B1: ADDRESS[15:8]
B2: ADDRESS[7:0]
B3: COUNT[23:16]
B4: COUNT[15:8]
B5: COUNT[7:0]
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...........continued
Field Size Description
Payload C: 6 3- Internal register WR*
Params:
Offset address: 3 bytes
Write data: 3 bytes
* “clocked or clockless registers”
Payload bytes:
B0: OFFSET-ADDR[15:8]
B1: OFFSET-ADDR [7:0]
B2: DATA[31:24]
B3: DATA [23:16]
B4: DATA [15:8]
B5: DATA [7:0]
Payload D: 7 Type D (length 7)
1- DMA single-word WR
Params:
Address: 3 bytes
DMA Data: 4 bytes
Payload bytes:
B0: ADDRESS[23:16]
B1: ADDRESS[15:8]
B2: ADDRESS[7:0]
B3: DATA[31:24]
B4: DATA [23:16]
B5: DATA [15:8]
B6: DATA [7:0]
CRC7 1 byte Optional data integrity field
comprising two subfields:
bit 0: fixed value ‘1’
bits 1-7: 7 bit CRC value
computed using polynomial G(x)
= X^7 + X^3 + 1 with seed value:
0x7F
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The following table summarizes the different commands according to the payload type (DMA address = 3
bytes):
Table 14-2. Commands in Payload
Payload Type Payload Size Command Packet Size with CRC Commands
Type A 3 bytes 5 bytes 1- DMA Single-Word Read
2- Internal Register Read
3- Transaction Termination
4- Repeat Data Packet
5- Soft Reset
Type B 5 bytes 7 bytes 1- DMA Read
2- DMA Write
Type C 6 bytes 8 bytes 1- DMA Extended Read
2- DMA Extended Write
3- Internal Register Write
Type D 7 bytes 9 bytes 1- DMA Single-Word Write
14.1.2 Response Format
The following frame format is used for responses sent by the WINC device as the result of receiving a
Command or certain Data frames. The Response message has a fixed length of two bytes.
The first byte contains two fields of four bits each to identify the response message and the response
type.
The second byte indicates the status of the WINC after receiving and, where possible, executing the
command/data. This byte contains two sub fields:
• B0-B3: Error state
• B4-B7: DMA state
States that may be indicated are:
• DMA state:
– DMA ready for any transaction
– DMA engine is busy
• Error state:
– No error
– Unsupported command
– Receiving unexpected data packet
– Command CRC7 error
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Table 14-3. Response Format
Field Size Description
Response Start 4 bits Response Start : 4’b1100
Response Type 4 bits If the response packet is for Command:
• Contains of copy of the Command Type field in the Command.
If the response packet is for received Data Packet:
• 4’b0001: first data packet is received
• 4’b0010: Receiving data packets
• 4’b0011: last data packet is received
• 4’b1111: Reserved value
State 1 byte This field is divided into two subfields:
DMA State :
• 4’b0000: DMA ready for any transaction
• 4’b0001: DMA engine is busy
Error State:
• 4’b0000: No error
• 4’b0001: Unsupported command
• 4’b0010: Receiving unexpected data packet
• 4’b0011: Command CRC7 error
• 4’b0100: Data CRC16 error
• 4’b0101: Internal general error
14.1.3 Data Packet Format
The Data Packet Format is used in either direction (Master to Slave or Slave to Master) to transfer
opaque data. A command frame is used either to inform the Slave that a data packet is about to be sent
or to request the Slave to send a data packet to the Master. In the case of Master to Slave, the Slave
sends a response after the command and each subsequent data frame. The format of a data packet is
shown below.
To support DMA hardware, a large data transfer may be fragmented into multiple smaller Data Packets.
This is controlled by the value of DATA_PACKET_SIZE which is agreed between the Master and the
Slave in software and is a fixed value such as 256B, 512B, 1KB (default), 2KB, 4KB, or 8KB. If a transfer
has a length of m, which exceeds DATA_PACKET_SIZE, the sender must split it into multiple
DATA_PACKET_SIZE as shown in Equation 1:
ATWINC15x0
WINC SPI Protocol
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 98
(m – (n-1)* DATA_PACKET_SIZE) -------------------------- Equation 1
Where,
1.. n-1 = length of the DATA_PACKET_SIZE
n = frame length
This is illustrated below.
• If DMA count <= DATA_PACKET_SIZE:
The data packet is “DATA_Header + DMA count +optional CRC16“, that is no padding.
• If DMA count > DATA_PACKET_SIZE:
• If remaining data < DATA_PACKET_SIZE, the last data packet is:
“DATA_Header + remaining data + optional CRC16 “, that is no padding.
The frame fields are described in detail in the following table:
Table 14-4. Frame Field
Field Size Description
Data Start 4 bits 4’b1111 (Default)
(Can be changed to any value by programming
DATA_START_CTRL register)
Packet
Order
4 bits 4’b0001: First packet in this transaction
4’b0010: Neither the first or the last packet in this transaction
4’b0011: Last packet in this transaction
4’b1111: Reserved
Data bytes DATA_PACKET_SIZE User data
CRC16 2 bytes Optional data integrity field comprising a 16-bit CRC value
encoded in two bytes. The most significant 8 bits are transmitted
first in the frame.
The CRC16 value is computed on data bytes only based on the
polynomial:
G(x) = X^16 + X^12 + X^5 + 1, seed value: 0xFFFF
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WINC SPI Protocol
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14.1.4 Error Recovery Mechanism
Table 14-5. Error Recovery Mechanism
Error Type Recovery Mechanism
Master
CRC error in
command
1. Error response received from Slave.
2. Retransmit the command.
CRC error in received
data
1. Issue a repeat command for the data packet that has a CRC error.
2. Slave sends a response to the previous command.
3. Slave keeps the start DMA address of the previous data packet, so it can
retransmit it.
4. Receive the data packet again.
No response is
received from Slave
• Synchronization is lost between the Master and Slave.
• The worst case is when Slave is in receiving data state.
• Solution: The Master must wait for max DATA_PACKET_SIZE period
then generate a Soft Reset command.
Unexpected response Retransmit the command.
TX/RX Data count
error
Retransmit the command.
No response to Soft
Reset command
• Transmit all ones until Master receives a response of all ones from the
Slave.
• Then deactivate the output data line.
Slave
Unsupported
command
• Send response with error.
• Returns to command monitor state.
Receive command
CRC error
• Send response with error.
• Wait for command retransmission.
Received data CRC
error
• Send response with error.
• Wait for retransmission of the data packet.
Internal general error • The Master must do a Soft Reset on the Slave.
TX/RX Data count
error
• Only the Master can detect this error.
• Slave operates with the data count received until the count finishes or the
Master terminates the transaction.
• In both cases, the Master can retry the command from the start.
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...........continued
Error Type Recovery Mechanism
No response to Soft
Reset command
1. First received 4’b1001, it decides data start.
2. Then received packet order 4’b1111 that is reserved value.
3. Then monitors for 7 bytes all ones to decide Soft Reset action.
4. The Slave must activate the output data line.
5. Waits for deactivation for the received line.
6. The Slave then deactivates the output data line and returns to the CMD/
DATA start monitor state.
General Notes • The Slave must monitor the received line for command reception at any
time.
• When a CMD start is detected, the Slave receives 8 bytes then return
again to the command reception state.
• When the Slave is transmitting data, it must also monitor for command
reception.
• When the Slave is receiving data, it monitors for command reception
between the data packets.
• Issuing a Soft Reset command is detected in all cases.
14.1.5 Clockless Registers Access
Clockless register access allows a host device to access registers on the WINC device while it is held in a
reset state. This type of access can only be done using the “internal register read” and “internal register
write” commands. For clockless access, bit 15 of the Offset_addr in the command must be ‘1’ to
differentiate between the Clockless and Clocked access mode.
For Clockless register write: - the protocol Master must wait for the response as shown here:
For Clockless register read: - according to the interface, the protocol Slave may not send CRC16. One or
two byte padding depends on three or four byte DMA addresses.
14.2 Message Flow for Basic Transactions
This section shows the essential message exchanges and timings associated with the following
commands:
• Read Single Word
• Read Internal Register (clockless)
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• Read Block
• Write Single Word
• Write Internal Register (clockless)
• Write Bock
14.2.1 Read Single Word
14.2.2 Read Internal Register (for clockless registers)
14.2.3 Read Block
Normal transaction:
Master － issues a DMA read transaction and waits for a response.
Slave － sends a response after CMD_RES_PERIOD.
Master － waits for a data packet start.
Slave － sends the data packets, separated by DATA_DATA_PERIOD[1] where DATA_DATA_PERIOD is
controlled by software and has one of these values: NO_DELAY (default), 4_BYTE_PERIOD,
8_BYTE_PERIOD, and 16_BYTE_PERIOD.
Slave － continues sending until the count ends.
Master － receives data packets. No response is sent for data packets but a termination/retransmit
command may be sent if there is an error.
The message sequence for this case is shown below:
Termination command is issued:
Master － can issue a termination command at any time during the transaction.
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Master － monitors for RES_START after CMD_RESP_PERIOD.
Slave － cuts off the current running data packet if there is any.
Slave － responds to the termination command after CMD_RESP_PERIOD from the end of the
termination command packet.
Repeat command is issued:
1. Master － can issue a repeat command at any time during the transaction.
2. Master － monitors for RES_START after CMD_RESP_PERIOD.
3. Slave － cuts off the current running data packet, if any.
4. Slave － responds to the repeat command after CMD_RESP_PERIOD from the end of the repeat
command packet.
5. Slave － sends the data packet again that has an error then continues the transaction as normal.
[1] The period between the data packets is “DATA_DATA_PERIOD + DMA access time.” The Master
monitors for DATA_START directly after DATA_DATA_PERIOD.
14.2.4 Write Single Word
1. Master － issues DMA single-word write command, including the data.
2. Slave － takes the data and sends a command response.
14.2.5 Write Internal Register (for clockless registers)
1. Master － issues an internal register write command, including the data.
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2. Slave － takes the data and sends a command response.
14.2.6 Write Block
• Case 1: Master waits for a command response:
1.1. Master － issues a DMA write command and waits for a response.
1.2. Slave － sends response after CMD_RES_PERIOD.
1.3. Master － sends the data packets after receiving response.
1.4. Slave － sends a response packet for each data packet received after
DATA_RES_PERIOD.
1.5. Master － does not wait for the data response before sending the following data packet
notes:
CMD_RES_PERIOD is controlled by SW taking one of the values:
NO_DELAY (default), 1_BYTE_PERIOD, 2_BYTE_PERIOD and 3_BYTE_PERIOD
The Master must monitor for RES_START after CMD_RES_PERIOD
DATA_RES_PERIOD is controlled by SW taking one of the values:
NO_DELAY (default), 1_BYTE_PERIOD, 2_BYTE_PERIOD and 3_BYTE_PERIOD
• Case 2: Master does not wait for a command response:
2.1. Master － sends the data packets directly after the command but it still monitors for a
command response after CMD_RESP_PERIOD.
2.2. Master － retransmits the data packets if there is an error in the command.
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14.3 SPI Level Protocol Example
To illustrate how the WINC SPI protocol works, the SPI bytes from the scan request example are dumped
and the sequence is described below.
14.3.1 TX (Send Request)
1. First step in hif_send() API is to wake up the chip.
sint8 nm_clkless_wake(void)
{
ret = nm_read_reg_with_ret(0x1, ®);
/* Set bit 1 */
ret = nm_write_reg(0x1, reg | (1 << 1));
// Check the clock status
ret = nm_read_reg_with_ret(clk_status_reg_adr, &clk_status_reg);
// Tell Firmware that Host waked up the chip
ret = nm_write_reg(WAKE_REG, WAKE_VALUE);
return ret;
}
Command CMD_INTERNAL_READ: 0xC4 /* internal register read */
BYTE [0] = CMD_INTERNAL_READ
BYTE [1] = address >> 8; /* address = 0x01 */
BYTE [1] |= (1 << 7); /* clockless register */
BYTE [2] = address;
BYTE [3] = 0x00;
2. The WINC acknowledges the command by sending three bytes [C4] [0] [F3].
3. The WINC chip sends the value of the register 0x01 which equals 0x01.
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Command CMD_INTERNAL_WRITE: C3 /* internal register write */
BYTE [0] = CMD_INTERNAL_WRITE
BYTE [1] = address >> 8; /* address = 0x01 */
BYTE [1] |= (1 << 7); /* clockless register */
BYTE [2] = address;
BYTE [3] = u32data >> 24; /* Data = 0x03 */
BYTE [4] = u32data >> 16;
BYTE [5] = u32data >> 8;
BYTE [6] = u32data;
4. The WINC acknowledges the command by sending two bytes [C3] [0].
Command CMD_INTERNAL_READ: 0xC4 /* internal register read */
BYTE [0] = CMD_INTERNAL_READ
BYTE [1] = address >> 8; /* address = 0x0F */
BYTE [1] |= (1 << 7); /* clockless register */
BYTE [2] = address;
BYTE [3] = 0x00;
5. The WINC acknowledges the command by sending three bytes [C4] [0] [F3].
6. The WINC chip sends the value of the register 0x01 which equals 0x07.
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Command CMD_SINGLE_WRITE:0XC9 /* single word write */
BYTE [0] = CMD_SINGLE_WRITE
BYTE [1] = address >> 16; /* WAKE_REG address = 0x1074 */
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = u32data >> 24; /* WAKE_VALUE Data = 0x5678 */
BYTE [5] = u32data >> 16;
BYTE [6] = u32data >> 8;
BYTE [7] = u32data;
7. The chip acknowledges the command by sending two bytes [C9] [0].
8. At this point, HIF finishes executing the clockless wake up of the WINC chip.
9. The HIF layer prepares and sets the HIF layer header to NMI_STATE_REG register (4 byte or 8
byte header describing the packet to be sent).
10. Set bit '1' of WIFI_HOST_RCV_CTRL_2 register to raise an interrupt to the chip.
sint8 hif_send(uint8 u8Gid,uint8 u8Opcode,uint8 *pu8CtrlBuf,uint16 u16CtrlBufSize,
uint8 *pu8DataBuf,uint16 u16DataSize, uint16 u16DataOffset)
{
volatile tstrHifHdr strHif;
volatile uint32 reg;
strHif.u8Opcode = u8Opcode&(~NBIT7);
strHif.u8Gid = u8Gid;
strHif.u16Length = M2M_HIF_HDR_OFFSET;
strHif.u16Length += u16CtrlBufSize;
ret = nm_clkless_wake();
reg = 0UL;
reg |= (uint32)u8Gid;
reg |= ((uint32)u8Opcode<<8);
reg |= ((uint32)strHif.u16Length<<16);
ret = nm_write_reg(NMI_STATE_REG,reg);
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reg = 0;
reg |= (1<<1);
ret = nm_write_reg(WIFI_HOST_RCV_CTRL_2, reg);
Command CMD_SINGLE_WRITE:0XC9 /* single word write */
BYTE [0] = CMD_SINGLE_WRITE
BYTE [1] = address >> 16; /* NMI_STATE_REG address = 0x108c */
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = u32data >> 24; /* Data = 0x000C3001 */
BYTE [5] = u32data >> 16; /* 0x0C is the length and equals 12 */
BYTE [6] = u32data >> 8; /* 0x30 is the Opcode =
M2M_WIFI_REQ_SET_SCAN_REGION */
BYTE [7] = u32data; /* 0x01 is the Group ID = M2M_REQ_GRP_WIFI */
11. The WINC acknowledges the command by sending two bytes [C9] [0].
Command CMD_SINGLE_WRITE:0XC9 /* single word write */
BYTE [0] = CMD_SINGLE_WRITE
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_2address = 0x1078*/
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = u32data >> 24; /* Data = 0x02 */
BYTE [5] = u32data >> 16;
BYTE [6] = u32data >> 8;
BYTE [7] = u32data;
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12. The WINC acknowledges the command by sending two bytes [C9] [0].
13. Then HIF polls for DMA address.
for (cnt = 0; cnt < 1000; cnt ++)
{
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_2,(uint32 *)®);
if(ret != M2M_SUCCESS) break;
if (!(reg & 0x2))
{
ret = nm_read_reg_with_ret(0x150400,(uint32 *)&dma_addr);
/*in case of success break */
break;
}
}
Command CMD_SINGLE_READ: 0xCA /* single word (4 bytes) read */
BYTE [0] = CMD_SINGLE_READ
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_2 address = 0x1078 */
BYTE [2] = address >> 8;
BYTE [3] = address;
14. The WINC acknowledges the command by sending three bytes [CA] [0] [F3].
15. The WINC chip sends the value of the register 0x1078, which equals 0x00.
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Command CMD_SINGLE_READ: 0xCA /* single word (4 bytes) read */
BYTE [0] = CMD_SINGLE_READ
BYTE [1] = address >> 16; /* address = 0x1504 */
BYTE [2] = address >> 8;
BYTE [3] = address;
16. The WINC acknowledges the command by sending three bytes [CA] [0] [F3].
17. The WINC chip sends the value of the register 0x1504, which equals 0x037AA0.
18. The WINC writes the HIF header to the DMA memory address.
u32CurrAddr = dma_addr;
strHif.u16Length=NM_BSP_B_L_16(strHif.u16Length);
ret = nm_write_block(u32CurrAddr, (uint8*)&strHif, M2M_HIF_HDR_OFFSET);
Command CMD_DMA_EXT_WRITE: 0xC7 /* DMA extended write */
BYTE [0] = CMD_DMA_EXT_WRITE
BYTE [1] = address >> 16; /* address = 0x037AA0 */
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = size >> 16; /* size = 0x08 */
BYTE [5] = size >> 8;
BYTE [6] = size;
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19. The WINC acknowledges the command by sending three bytes [C7] [0] [F3].
20. The HIF layer writes the data.
21. The HIF writes the Control Buffer data (part of the framing of the request).
if (pu8CtrlBuf != NULL)
{
ret = nm_write_block(u32CurrAddr, pu8CtrlBuf, u16CtrlBufSize);
if(M2M_SUCCESS != ret) goto ERR1;
u32CurrAddr += u16CtrlBufSize;
}
Command CMD_DMA_EXT_WRITE: 0xC7 /* DMA extended write */
BYTE [0] = CMD_DMA_EXT_WRITE
BYTE [1] = address >> 16; /* address = 0x037AA8 */
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = size >> 16; /* size = 0x04 */
BYTE [5] = size >> 8;
BYTE [6] = size;
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22. The WINC acknowledges the command by sending three bytes [C7] [0] [F3].
23. The HIF layer writes the data.
24. The HIF finished writing the request data to memory and is going to interrupt the chip notifying that
host TX is done.
reg = dma_addr << 2;
reg |= (1 << 1);
ret = nm_write_reg(WIFI_HOST_RCV_CTRL_3, reg);
Command CMD_SINGLE_WRITE:0XC9 /* single word write */
BYTE [0] = CMD_SINGLE_WRITE
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_3 address = 0x106C */
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = u32data >> 24; /* Data = 0x000DEA82 */
BYTE [5] = u32data >> 16;
BYTE [6] = u32data >> 8;
BYTE [7] = u32data;
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25. The WINC acknowledges the command by sending two bytes [C9] [0].
26. The HIF layer allows the chip to enter Sleep mode again.
sint8 hif_chip_sleep(void)
{
sint8 ret = M2M_SUCCESS;
uint32 reg = 0;
ret = nm_write_reg(WAKE_REG, SLEEP_VALUE);
/* Clear bit 1 */
ret = nm_read_reg_with_ret(0x1, ®);
if(reg&0x2)
{
reg &=~(1 << 1);
ret = nm_write_reg(0x1, reg);
}
}
Command CMD_SINGLE_WRITE:0XC9 /* single word write */
BYTE [0] = CMD_SINGLE_WRITE
BYTE [1] = address >> 16; /* WAKE_REG address = 0x1074 */
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = u32data >> 24; /* SLEEP_VALUE Data = 0x4321 */
BYTE [5] = u32data >> 16;
BYTE [6] = u32data >> 8;
BYTE [7] = u32data;
27. The WINC acknowledges the command by sending two bytes [C9] [0].
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Command CMD_INTERNAL_READ: 0xC4 /* internal register read */
BYTE [0] = CMD_INTERNAL_READ
BYTE [1] = address >> 8; /* address = 0x01 */
BYTE [1] |= (1 << 7); /* clockless register */
BYTE [2] = address;
BYTE [3] = 0x00;
28. The WINC acknowledges the command by sending three bytes [C4] [0] [F3].
29. The WINC chip sends the value of the register 0x01 which equals 0x03.
Command CMD_INTERNAL_WRITE: C3 /* internal register write */
BYTE [0] = CMD_INTERNAL_WRITE
BYTE [1] = address >> 8; /* address = 0x01 */
BYTE [1] |= (1 << 7); /* clockless register */
BYTE [2] = address;
BYTE [3] = u32data >> 24; /* Data = 0x01 */
BYTE [4] = u32data >> 16;
BYTE [5] = u32data >> 8;
BYTE [6] = u32data;
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30. The WINC chip acknowledges the command by sending two bytes [C3] [0].
31. At this point, the HIF layer has completed posting the scan Wi-Fi request to the WINC chip for
processing.
14.3.2 RX (Receive Response)
After finishing the required operation (scan Wi-Fi), the WINC interrupts the host to notify of the processing
of the request. The host handles this interrupt to receive the response.
1. First step in hif_isr is to wake up the WINC chip.
sint8 nm_clkless_wake(void)
{
ret = nm_read_reg_with_ret(0x1, ®);
/* Set bit 1 */
ret = nm_write_reg(0x1, reg | (1 << 1));
// Check the clock status
ret = nm_read_reg_with_ret(clk_status_reg_adr, &clk_status_reg);
// Tell Firmware that Host waked up the chip
ret = nm_write_reg(WAKE_REG, WAKE_VALUE);
return ret;
}
Command CMD_INTERNAL_READ: 0xC4 /* internal register read */
BYTE [0] = CMD_INTERNAL_READ
BYTE [1] = address >> 8; /* address = 0x01 */
BYTE [1] |= (1 << 7); /* clockless register */
BYTE [2] = address;
BYTE [3] = 0x00;
2. The WINC acknowledges the command by sending three bytes [C4] [0] [F3].
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3. The WINC chip sends the value of the register 0x01 which equals 0x01.
Command CMD_INTERNAL_WRITE: C3 /* internal register write */
BYTE [0] = CMD_INTERNAL_WRITE
BYTE [1] = address >> 8; /* address = 0x01 */
BYTE [1] |= (1 << 7); /* clockless register */
BYTE [2] = address;
BYTE [3] = u32data >> 24; /* Data = 0x03 */
BYTE [4] = u32data >> 16;
BYTE [5] = u32data >> 8;
BYTE [6] = u32data;
4. The WINC acknowledges the command by sending two bytes [C3] [0].
Command CMD_INTERNAL_READ: 0xC4 /* internal register read */
BYTE [0] = CMD_INTERNAL_READ
BYTE [1] = address >> 8; /* address = 0x0F */
BYTE [1] |= (1 << 7); /* clockless register */
BYTE [2] = address;
BYTE [3] = 0x00;
5. The WINC acknowledges the command by sending three bytes [C4] [0] [F3].
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6. Then WINC chip sends the value of the register 0x01 which equals 0x07.
Command CMD_SINGLE_WRITE:0XC9 /* single word write */
BYTE [0] = CMD_SINGLE_WRITE
BYTE [1] = address >> 16; /* WAKE_REG address = 0x1074 */
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = u32data >> 24; /* WAKE_VALUE Data = 0x5678 */
BYTE [5] = u32data >> 16;
BYTE [6] = u32data >> 8;
BYTE [7] = u32data;
7. The chip acknowledges the command by sending two bytes [C9] [0].
8. Read register WIFI_HOST_RCV_CTRL_0 to check if there is a new interrupt, and clear it.
static sint8 hif_isr(void)
{
sint8 ret ;
uint32 reg;
volatile tstrHifHdr strHif;
ret = hif_chip_wake();
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_0, ®);
if(reg & 0x1) /* New interrupt has been received */
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{
uint16 size;
/*Clearing RX interrupt*/
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_0,®);
reg &= ~(1<<0);
ret = nm_write_reg(WIFI_HOST_RCV_CTRL_0,reg);
Command CMD_SINGLE_READ: 0xCA /* single word (4 bytes) read */
BYTE [0] = CMD_SINGLE_READ
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_0 address = 0x1070 */
BYTE [2] = address >> 8;
BYTE [3] = address;
9. The WINC acknowledges the command by sending three bytes [CA] [0] [F3].
10. The WINC chip sends the value of the register 0x1070 which equals 0x31.
Command CMD_SINGLE_READ: 0xCA /* single word (4 bytes) read */
BYTE [0] = CMD_SINGLE_READ
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_0 address = 0x1070 */
BYTE [2] = address >> 8;
BYTE [3] = address;
11. The WINC acknowledges the command by sending three bytes [CA] [0] [F3].
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12. The WINC chip sends the value of the register 0x1070 which equals 0x31.
13. Clear the WINC Interrupt.
Command CMD_SINGLE_WRITE:0XC9 /* single word write */
BYTE [0] = CMD_SINGLE_WRITE
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_0 address = 0x1070 */
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = u32data >> 24; /* Data = 0x30 */
BYTE [5] = u32data >> 16;
BYTE [6] = u32data >> 8;
BYTE [7] = u32data;
14. The chip acknowledges the command by sending two bytes [C9] [0].
15. The HIF reads the data size.
/* read the rx size */
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_0, ®);
Command CMD_SINGLE_READ: 0xCA /* single word (4 bytes) read */
BYTE [0] = CMD_SINGLE_READ
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_0 address = 0x1070 */
BYTE [2] = address >> 8;
BYTE [3] = address;
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16. The WINC acknowledges the command by sending three bytes [CA] [0] [F3].
17. The WINC chip sends the value of the register 0x1070 which equals 0x30.
18. The HIF reads hif header address.
/** start bus transfer**/
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_1, &address);
Command CMD_SINGLE_READ: 0xCA /* single word (4 bytes) read */
BYTE [0] = CMD_SINGLE_READ
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_1 address = 0x1084 */
BYTE [2] = address >> 8;
BYTE [3] = address;
19. The WINC acknowledges the command by sending three bytes [CA] [0] [F3].
20. The WINC chip sends the value of the register 0x1078 which equals 0x037AB0.
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21. The HIF reads the hif header data (as a block).
ret = nm_read_block(address, (uint8*)&strHif, sizeof(tstrHifHdr));
Command CMD_DMA_EXT_READ: C8 /* dma extended read */
BYTE [0] = CMD_DMA_EXT_READ
BYTE [1] = address >> 16; /* address = 0x037AB0*/
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = size >> 16;
BYTE [5] = size >>;
BYTE [6] = size;
22. The WINC acknowledges the command by sending three bytes [C8] [0] [F3].
23. The WINC sends the data block (four bytes).
24. The HIF calls the appropriate handler according to the hif header received which tries to receive the
Response data payload.
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Note: hif_receive obtains additional data.
sint8 hif_receive(uint32 u32Addr, uint8 *pu8Buf, uint16 u16Sz, uint8 isDone)
{
uint32 address, reg;
uint16 size;
sint8 ret = M2M_SUCCESS;
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_0,®);
size = (uint16)((reg >> 2) & 0xfff);
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_1,&address);
/* Receive the payload */
ret = nm_read_block(u32Addr, pu8Buf, u16Sz);
}
Command CMD_SINGLE_READ: 0xCA /* single word (4 bytes) read */
BYTE [0] = CMD_SINGLE_READ
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_0 address = 0x1070 */
BYTE [2] = address >> 8;
BYTE [3] = address;
25. The WINC acknowledges the command by sending three bytes [CA] [0] [F3].
26. The WINC chip sends the value of the register 0x1070 which equals 0x30.
Command CMD_SINGLE_READ: 0xCA /* single word (4 bytes) read */
BYTE [0] = CMD_SINGLE_READ
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_1 address = 0x1084 */
BYTE [2] = address >> 8;
BYTE [3] = address;
27. The WINC acknowledges the command by sending three bytes [CA] [0] [F3].
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28. The WINC chip sends the value of the register 0x1078 which equals 0x037AB0.
Command CMD_DMA_EXT_READ: C8 /* dma extended read */
BYTE [0] = CMD_DMA_EXT_READ
BYTE [1] = address >> 16; /* address = 0x037AB8*/
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = size >> 16;
BYTE [5] = size >>;
BYTE [6] = size;
29. The WINC acknowledges the command by sending three bytes [C8] [0] [F3].
30. The WINC sends the data block (four bytes).
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31. After the HIF layer received the response, it interrupts the chip to send the notification that the host
RX is done.
static sint8 hif_set_rx_done(void)
{
uint32 reg;
sint8 ret = M2M_SUCCESS;
ret = nm_read_reg_with_ret(WIFI_HOST_RCV_CTRL_0,®);
/* Set RX Done */
reg |= (1<<1);
ret = nm_write_reg(WIFI_HOST_RCV_CTRL_0,reg);
}
Command CMD_SINGLE_READ: 0xCA /* single word (4 bytes) read */
BYTE [0] = CMD_SINGLE_READ
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_0 address = 0x1070 */
BYTE [2] = address >> 8;
BYTE [3] = address;
32. The WINC acknowledges the command by sending three bytes [CA] [0] [F3].
33. The WINC chip sends the value of the register 0x1070 which equals 0x30.
Command CMD_SINGLE_WRITE:0XC9 /* single word write */
BYTE [0] = CMD_SINGLE_WRITE
BYTE [1] = address >> 16; /* WIFI_HOST_RCV_CTRL_0 address = 0x1070 */
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = u32data >> 24; /* Data = 0x32*/
BYTE [5] = u32data >> 16;
BYTE [6] = u32data >> 8;
BYTE [7] = u32data;
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34. The chip acknowledges the command by sending two bytes [C9] [0].
35. The HIF layer allows the chip to enter Sleep mode again.
sint8 hif_chip_sleep(void)
{
sint8 ret = M2M_SUCCESS;
uint32 reg = 0;
ret = nm_write_reg(WAKE_REG, SLEEP_VALUE);
/* Clear bit 1 */
ret = nm_read_reg_with_ret(0x1, ®);
if(reg&0x2)
{
reg &=~(1 << 1);
ret = nm_write_reg(0x1, reg);
}
}
Command CMD_SINGLE_WRITE:0XC9 /* single word write */
BYTE [0] = CMD_SINGLE_WRITE
BYTE [1] = address >> 16; /* WAKE_REG address = 0x1074 */
BYTE [2] = address >> 8;
BYTE [3] = address;
BYTE [4] = u32data >> 24; /* SLEEP_VALUE Data = 0x4321 */
BYTE [5] = u32data >> 16;
BYTE [6] = u32data >> 8;
BYTE [7] = u32data;
36. The WINC acknowledges the command by sending two bytes [C9] [0].
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Command CMD_INTERNAL_READ: 0xC4 /* internal register read */
BYTE [0] = CMD_INTERNAL_READ
BYTE [1] = address >> 8; /* address = 0x01 */
BYTE [1] |= (1 << 7); /* clockless register */
BYTE [2] = address;
BYTE [3] = 0x00;
37. The WINC acknowledges the command by sending three bytes [C4] [0] [F3].
38. Then WINC chip sends the value of the register 0x01 which equals 0x03.
Command CMD_INTERNAL_WRITE: C3 /* internal register write */
BYTE [0] = CMD_INTERNAL_WRITE
BYTE [1] = address >> 8; /* address = 0x01 */
BYTE [1] |= (1 << 7); /* clockless register */
BYTE [2] = address;
BYTE [3] = u32data >> 24; /* Data = 0x01 */
BYTE [4] = u32data >> 16;
BYTE [5] = u32data >> 8;
BYTE [6] = u32data;
39. The WINC chip acknowledges the command by sending two bytes [C3] [0].
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40. Scan Wi-Fi request is sent to the WINC chip and the response is successfully sent to the host.
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15. Appendix A. How to Generate Certificates
15.1 Introduction
This chapter explains the required procedures to create and sign custom certificates using OpenSSL. To
use this guide you must install OpenSSL on your machine.
OpenSSL is an open-source implementation of the SSL and TLS protocols. The core library, written in the
C programming language, implements basic cryptographic functions and provides various utility
functions.
OpenSSL can be downloaded from the following URL: https://www.openssl.org/related/binaries.html.
15.2 Steps
After installing OpenSSL, open a CMD prompt and navigate to the directory where OpenSSL was
installed (For example: C:\OpenSSL-Win64\bin).
1. Generate a key for the CA (certification authority). To generate a 4096-bit long RSA (creates a new
file CA_KEY.key to store the random key), using the following command (CMD):
openssl genrsa -out CA_KEY.key 4096
2. Create your self-signed root CA certificate CA_CERT.crt; you need to provide some data for your
Root certificate, using the following command (CMD):
openssl req -new -x509 -days 1826 -key CA_KEY.key -out CA_CERT.crt
3. Create the custom certificate, which is signed by the CA root certificate created earlier. First,
generate the Custom.key, using the following command (CMD):
openssl genrsa -out Custom.key 4096
4. To generate a certificate request file (CSR) using this generated key, use the following command
(CMD):
openssl req -new -key Custom.key -out CertReq.csr
5. Process the request for the certificate and get it signed by the root CA, using the following
command (CMD):
openssl x509 -req -days 730 -in CertReq.csr -CA CA_CERT.crt -CAkey CA_KEY.key -
set_serial 01 -out CustomCert.crt
15.3 Limitations
The following are the limitations of BigInt_ModExp() API.
1. DHE greater than 2048-bit is not supported.
2. RSA signature verification greater than 2048-bit is done in software; 4096-bit takes 4 seconds per
verification, assuming a typical public key of 2^16+1.
3. RSA signature generation greater than 2048-bit is not supported.
ATWINC15x0
Appendix A. How to Generate Certificates
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 128
16. Appendix B. X.509 Certificate Format and Conversion
16.1 Introduction
The most known encodings for the X.509 digital certificates are PEM and DER formats.
The PEM format is base64 encoding of the DER enclosed with messages "-----BEGIN CERTIFICATE-----"
and "-----END CERTIFICATE-----".
16.2 Conversion Between Different Formats
The current implementation of the WINC root_certificate_downloader supports only DER format. If the
certificate is not in DER format, it must be converted first. The conversion between different formats are
done in several methods:
16.2.1 Using Windows
From Windows®
7, double click on the .crt certificate file and then go to the Details Tab and press “Copy
to File”. Follow the Certificate Export Wizard until the Finish button.
16.2.2 Using OpenSSL
The OpenSSL is used for certificate conversion by the following command.
openssl x509 -outform der -in certificate.pem -out certificate.der
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Appendix B. X.509 Certificate Format and C...
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 129
16.2.3 Online Conversion
There are useful online tools which provide conversion between the certificate formats, which can be
found through searching online using keywords such as "OpenSSL".
ATWINC15x0
Appendix B. X.509 Certificate Format and C...
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 130
17. References
The following documents can be used for further study:
• ATWINC15x0 Wi-Fi Network Controller Software Programming Guide
• ATWINC15x0-MR210xB Data Sheet
The following web page can be referred for further study on API:
• Atmel Software Framework for ATWINC1500 (Wi-Fi)
ATWINC15x0
References
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 131
18. Document Revision History
Rev B - 10/2018
Section Changes
6.2.3.12 setsockopt Added SOL_SSL_SOCKET information with example.
10. Over-The-Air
Upgrade
Removed “no HTTPS supported” from the chapter.
8.5 AP Mode Code
Example
Added Power Save note.
Document Removed the content related to Wi-Fi Direct mode and Wi-Fi Sniffer mode.
4.2 WINC Modes of
Operation
Updated WINC modes of operation.
8.1 Overview and 8.2
Setting the WINC AP
Mode
Updated the Wi-Fi AP mode chapter corresponding to WINC1500 v19.6.1
firmware.
5. Wi-Fi Station Mode Added support for Encrypted Credential Storage, Simple Roaming, Multiple
Gain Table, and Host File Download for Wi-Fi Station mode.
Rev A - 05/2017
Section Changes
Document • Updated from Atmel to Microchip template.
• Assigned a new Microchip document number. Previous version is
Atmel 42420 revision B.
• ISBN number added.
ATWINC15x0
Document Revision History
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 132
The Microchip Web Site
Microchip provides online support via our web site at http://www.microchip.com/. This web site is used as
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To register, access the Microchip web site at http://www.microchip.com/. Under “Support”, click on
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Users of Microchip products can receive assistance through several channels:
• Distributor or Representative
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Customers should contact their distributor, representative or Field Application Engineer (FAE) for support.
Local sales offices are also available to help customers. A listing of sales offices and locations is included
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Technical support is available through the web site at: http://www.microchip.com/support
Microchip Devices Code Protection Feature
Note the following details of the code protection feature on Microchip devices:
• Microchip products meet the specification contained in their particular Microchip Data Sheet.
• Microchip believes that its family of products is one of the most secure families of its kind on the
market today, when used in the intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of
these methods, to our knowledge, require using the Microchip products in a manner outside the
operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is
engaged in theft of intellectual property.
• Microchip is willing to work with the customer who is concerned about the integrity of their code.
ATWINC15x0
© 2018 Microchip Technology Inc. User Guide DS00002389B-page 133
• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their
code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the
code protection features of our products. Attempts to break Microchip’s code protection feature may be a
violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software
or other copyrighted work, you may have a right to sue for relief under that Act.
Legal Notice
Information contained in this publication regarding device applications and the like is provided only for
your convenience and may be superseded by updates. It is your responsibility to ensure that your
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Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life
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MPLAB Harmony Help
MPLAB Harmony
Copyright (c) 2013 Microchip Technology Inc. All rights reserved.
Table of Contents
1 Start Here 1-1
MPLAB Harmony Help
1
1 Start Here
This topic describes how to get started using the MPLAB Harmony Integrated Software Framework.
1. First Time Users
Name Description
Before You Start Before you start using MPLAB Harmony, be sure to install the MPLAB X IDE
Plug-In modules.
What is MPLAB Harmony? This topic provides an overview of key concepts necessary to understand the
MPLAB Harmony architecture.
Project Layout This topic explains how an MPLAB Harmony project is organized.
The Main File This topic describes the logic of the "main.c" file and the C-language "main"
function in an MPLAB Harmony project.
The Application File(s) This topic describes the normal structure of MPLAB Harmony application files.
More Information Describes what is available from the MPLAB Harmony web page.
Description
Software Building Blocks
MPLAB Harmony is a framework of software modules that serve as building blocks for your application. If this is the first time
you've used MPLAB Harmony, the "First Time Users" section is the best place to start learning. If you're an experienced MPLAB
Harmony developer, be sure to look at the "Release Notes & Information" section to find out what is in this release and what is
new.
1 MPLAB Harmony Help
1-1
1.1 1. First Time Users
1.1.1 Before You Start
Before you start using MPLAB Harmony, be sure to install the MPLAB X IDE Plug-In modules.
Description
Before you start using MPLAB Harmony, you should install the following MPLAB X IDE plug in modules, included in the MPLAB
Harmony installation.
1. The MPLAB Harmony "Help" plug-in module. (Located at: /doc/org-microchip-harmony_help.nbm)
2. The MPLAB Harmony Configurator plug-in module. (Located at:
/utilities/configurator/com-microchip-harmonyconfigurator.nbm)
Installing the Plug In Modules
1. Start MPLAB X IDE and select "Plugins" from the "Tools" menu as shown below.
2. Click the "Add Plugins..." button, navigate to and open the "com-microchip-harmonyconfigurator.nbm" plug-in file, as shown
below.
1.1 1. First Time Users MPLAB Harmony Help Before You Start
1-2
3. Ensure that the box under "Install" for the "MPLAB Harmony Configurator" plug-in is selected and click "Install" as shown
below.
1.1 1. First Time Users MPLAB Harmony Help Before You Start
1-3
4. Follow the prompts from the installation and continue until the installation completes. (Do not worry if the version you're
installing is "signed" but not "trusted". Just click "continue"). Once the installation has finished you can close the "Plugins" dialog
box.
You should now see a "MPLAB Harmony Configurator" option under the "Tools" menu. This indicates that the project
Configurator has been successfully installed.
1.1.2 What is MPLAB Harmony?
This topic provides an overview of key concepts necessary to understand the MPLAB Harmony architecture.
Description
Introduction
Microchip MPLAB® Harmony is the result of a holistic, aggregate approach to creating firmware solutions for embedded systems
using Microchip microcontrollers.
MPLAB® Harmony Block Diagram
1.1 1. First Time Users MPLAB Harmony Help What is MPLAB Harmony?
1-4
MPLAB Harmony Overview
Designed almost completely in the C language (with support for C++), MPLAB Harmony takes key elements of modular and
object-oriented design, adds in the flexibility to use a Real-Time Operating System (RTOS) or work without one if you prefer, and
provides a framework of software modules that are easy to use, configurable for your specific needs, and that work together in
complete harmony.
Portability
Portability is a concern that is often overlooked when a silicon manufacturer provides software. However, breadth of solutions is
a hallmark strength of Microchip, and MPLAB Harmony provides simple libraries to abstract away part-specific details and make
Microchip microcontrollers easy to use, regardless of which part you choose. Any time you design a new product or update an
existing one you have to balance capabilities against cost, but cost is more than just the bill of materials. It’s also the
Non-Refundable Engineering (NRE) cost to design and develop your solution. MPLAB Harmony provides peripheral libraries,
device drivers, and other libraries that use clear and consistent interfaces, requiring little or no change in your application code
and minimizing the engineering time and effort for each new design.
Device Drivers
The primary purpose of an MPLAB Harmony device driver (or “driver”) is to provide a simple and highly abstracted interface to a
peripheral, allowing your application (or other module in the system) to interact with a peripheral through a consistent set of
functions. A device driver is responsible for managing access to a peripheral, so that requests from different modules do not
conflict with each other, and for managing the state of that peripheral so that it always operates correctly.
Peripheral Libraries
A Peripheral Library (PLIB) is a simple access library that provides a consistent (but very low level) interface to a peripheral that
is “on board” the microcontroller. PLIBs hide register details, making it easier to write drivers that support multiple microcontroller
families, but they are not normally used by applications directly to interact with peripherals, as they provide little abstraction, and
because they require the caller to manage the detailed operation of a peripheral (including preventing conflicting requests from
other modules). Because of the lack of conflict protection in a PLIB, only one module in a system should directly access the PLIB
for a peripheral. Therefore, PLIBs are primarily used to implement device drivers (and some system services) to make them
portable.
Modularity
MPLAB Harmony libraries are modular software “building blocks” that allow you to divide-and-conquer your firmware design. The
interface to each library consists of a highly cohesive set of functions (not globally accessible variables or shared registers), so
that each module can manage its own resources. If one module needs to use the resources of another module, it calls that
module’s interface functions to do so. Interfaces between modules are kept simple with minimal inter-dependencies so that
modules are loosely coupled to each other. This approach helps to eliminate conflicts between modules and allows them to be
more easily used together like building blocks to create the solutions you need.
1.1 1. First Time Users MPLAB Harmony Help What is MPLAB Harmony?
1-5
Middleware Libraries
The normal usage models of some of the more complex peripherals, (i.e., USB or network interfaces) requires interpreting
complex protocols or may require substantial additional processing to produce useable results, such as drawing graphical
images on an LCD screen with an LCD controller peripheral. Therefore, while a device driver may be completely sufficient for a
simple peripheral like a UART, some peripherals require what is frequently called “middleware” (aptly named because it sits
between your application and the hardware abstraction layer or “driver” layer). MPLAB Harmony provides several middleware
library “stacks” to manage these more complex peripherals and provide the functionality you need and expect.
MPLAB Harmony middleware “stacks” are usually built upon device drivers and system services (explained below) so that they
can be supported on any Microchip microcontroller for which the required driver or service is supported. However, special
purpose implementations may be available that integrate the driver, certain services, and various modules within the “stack” for
efficiency.
System Services
MPLAB Harmony system services are responsible for managing shared resources so that other modules (drivers, middleware,
and applications) do not conflict on shared resources. For example, if the TCP/IP, USB, and Graphics stacks attempted to
concurrently use the Timer2 peripheral to perform some periodic task, they would very likely interfere with each other. However,
if instead they used a timer system service (as the following image illustrates), it is the responsibility of the system service to
keep the separate requests from interfering with each other. The timer service can be configured as desired for a specific system
(for example, you might decide to use Timer3 instead of Timer2) isolating the necessary changes to the configuration of a single
module and preventing potential conflicts.
The use of a system service is very similar the use of a device driver, except that a driver normally requires the caller to “open” it
to create unique client-to-driver association. A system service does not normally require the caller to open the service before
using it because system services are frequently shared by many clients within the system.
Compatibility
MPLAB Harmony modules (drivers, system services, and middleware – excluding PLIBs) are “active”. This means when an
application calls a module’s interface function, the call will usually return immediately and the module will continue working on its
own to complete the operation. Most modules will then provide a notification mechanism so the caller (i.e., client) can determine
when the operation has finished.
Harmony modules are implemented as cooperative state machines. The following image shows the basic idea of how this works.
Each module has an “Initialize” function and each module has one (or more) “Tasks” function(s) to maintain its state machine(s).
The state machines of all modules are initialized, shortly after the system comes out of reset in “main”. After that (in a polled
1.1 1. First Time Users MPLAB Harmony Help What is MPLAB Harmony?
1-6
configuration, with no OS), the system drops into a “super loop” where each module’s state machine function is repeatedly
called, one after the other, to allow it to do the next “task” necessary to keep its state machine running. This allows the system to
keep all modules running using a cooperative or shared “multi-tasking” technique. Modules (under control of your application)
interact with each other by calling the interface functions of other modules (as illustrated below) and the system-wide “super
loop” keeps all modules in the system running so they stay “active” and do their jobs.
This method is not suitable for all needs; therefore, other configurations are possible. However, a polled configuration is the
simplest to understand and it best illustrates the basic concept of how MPLAB Harmony modules work together, as shown
below. It is also easy to implement, easy to understand, and easy to debug.
Flexibility
The basic MPLAB Harmony model of cooperating state-machine driven modules, when combined with a little configurability,
becomes flexible enough to meet the needs of almost any embedded system. For example, if you’re using multiple identical
peripherals, MPLAB Harmony has “dynamic” driver implementations that can manage all instances of a peripheral with a single
instance of the driver code. You might also have a need for multiple “client” modules to use the same instance of a peripheral at
the same time (like the timer example, described previously). To manage this need, MPLAB Harmony has driver
implementations that are intelligent enough to manage requests from multiple clients. On the other hand, your needs may be
simpler than that. So, static and single client drivers are also available to help reduce the amount of code and data storage
needed for your system.
Or, your system may need to combine several middleware stacks and multiple, potentially independent, applications. If that is the
1.1 1. First Time Users MPLAB Harmony Help What is MPLAB Harmony?
1-7
case, the simple polling operation, using the “super loop” method frequently seen in simple embedded systems may not be
sufficient. However, when you start adding more modules, it becomes more and more difficult to meet the timing requirements of
all peripherals using a simple polled super loop.
Fortunately, MPLAB Harmony modules are written so that (where appropriate) their state machines can be run directly from an
Interrupt Service Routine (ISR) or an RTOS thread. Using an ISR allows you to eliminate the latency of waiting for the execution
of other modules in the loop to finish before a time-critical event is serviced, and it allows you to use the interrupt prioritization
capabilities available on some Microchip devices to ensure that your system responds to events in the real world in real-time.
Additionally, the ability to schedule and prioritize different tasks for different modules can be obtained for modules that are not
associated with a specific processor interrupt (such as many middleware modules and your application) using a Real-Time
Operating System (RTOS). In fact, that is one of the main reasons to use an RTOS. When your system becomes complex
enough that you start struggling to meet your timing requirements using the super loop method, it’s time to use an RTOS.
Fortunately, the MPLAB Harmony module state machines functions can be called from a loop in an RTOS thread just as easily
as they can be called from a polled “super loop” in a system without an RTOS. To allow this, modules are designed to be “thread
safe” by calling semaphore and mutex operations (and a few others, as necessary) through an Operating System Abstraction
Layer (OSAL). The OSAL provides a consistent set of functions to call, regardless of which RTOS is being used (or even if no
RTOS is used). The choice of RTOS to use, if any, is a configuration option. MPLAB Harmony supports several OS and non-OS
configurations and support for more operating systems is possible. All that is required is to implement the OSAL functions
appropriately for the desired OS.
Configurability
Most MPLAB Harmony libraries support a variety of build-time configuration options.
• Selection of supported Microchip microcontroller
• Interrupt-driven or polled execution
• Static-or-dynamic peripheral instance selection (for drivers)
• Single-or-multi-client support (for drivers)
• Other library-specific options
The need for selection of the microcontroller and execution environment has been previously explained. In addition, most drivers
and other library modules are designed to allow you to select a variety of configuration options to tailor them to your specific
usage. For example, you may be able to select buffer sizes for data transfer modules or clock sources for timer modules. The set
of configuration options for each module is identified and explained in the help documentation (along with the interface and
usage information) and peripheral initializer (MPLAB Harmony “Pi”) and configuration tools are provided to help simplify the
process of configuring your system exactly the way you want and to get you started with a set of initial source files for your
project.
Project Structure
To facilitate configurability, MPLAB Harmony projects are normally structured in a way that isolates the code necessary to
1.1 1. First Time Users MPLAB Harmony Help What is MPLAB Harmony?
1-8
configure a “system” from the library modules themselves and from your application code. The following illustrates this concept,
while the second figure shows how the files might appear in an MPLAB X IDE project.
In an MPLAB Harmony project, the “main.c” file is kept very simple and consistent (containing primarily, just the super-loop
previously discussed). The application files (app.c and app.h in the example to the left) are separate from the configuration files
in the “system_config” folder, so it is possible for a single application to have more than one configuration. (Usage of this
capability can be seen in example and demonstration projects included with the installation of MPLAB Harmony.) The library
modules that make up the MPLAB Harmony framework (in the “framework” folder) use the definitions provided in the selected
configuration header (system_config.h, highlighted in the illustration) to specify the configuration options you selected when you
configured the project. Finally the processor-specific peripheral libraries (if used) are provided as both a prebuilt binary (“.a”
linker file) and as in-line source code to allow for maximum build efficiency for your firmware projects.
Conclusion
MPLAB Harmony provides a complete framework for developing your firmware solutions using Microchip microcontrollers and
development tools. The firmware libraries and tools that make up the MPLAB Harmony framework are modular and compatible,
making them simple to use. They’re flexible and configurable, making them easy to tailor to your specific needs. And, they’re
portable across a wide range of Microchip microcontrollers so you’re sure to find a supported part that meets your needs.
1.1 1. First Time Users MPLAB Harmony Help Project Layout
1-9
1.1.3 Project Layout
This topic explains how an MPLAB Harmony project is organized.
Description
A sample project has been created to show you the structure of an MPLAB Harmony project. The "sample" project is available in
the following folder, directly under your MPLAB Harmony installation root folder.
/apps/examples/sample/firmware/sample.X
You should open this project in MPLAB X IDE and follow along with this guide.
An MPLAB Harmony Project is organized as shown below within MPLAB X IDE.
This organization consists of a few key "logical" folders and C-language files, as described below.
The "app" folder, which contains:
• The "main.c" file
• The "app.c" file
The "app" (short for "application") folder holds all of the application's firmware source files for the project. In a simple project, the
"app" folder will directly contain the "main.c" file and the "app.c" file. More complex projects will very likely contain additional files,
as needed. In an MPLAB Harmony project, the "main.c" file normally contains the C-language "main" function and little or nothing
else. This "main" logic is usually consistent across all MPLAB Harmony projects and should not need to be changed. The "app.c"
file normally contains the logic of the application itself. This is where the desired over-all behavior of your system is usually
implemented (although complex applications may have additional files).
The "system_config" folder
1.1 1. First Time Users MPLAB Harmony Help Project Layout
1-10
The "system_config" folder contains one or more subdirectories, each of which corresponds to a configuration of your application
or, more accurately, "system". MPLAB Harmony projects may have multiple configuration. In each configuration, you can select a
different set of libraries or modules, different build parameters for each module and different source files for your application. A
configuration consists of a specific set of properties (tools settings) in MPLAB X IDE and a set of source files that define the build
parameters and source code that control which modules are initialized and maintained in your system.
In MPLAB X IDE, the tools configuration can be selected by using a "pull down" menu in the tool bar at the top of the window or
buy "Right-clicking' on the project name and selecting "Properties". In most example and demo projects distributed with MPLAB
Harmony, name of each MPLAB X IDE configuration will match the name of the associated folder under the "system_config"
folder in the project (the "pic32mx_default" folder in the sample project). When a specific MPLAB X IDE configuration is selected,
the configuration files for that configuration are included in the build and the configuration files in other configuration folders are
excluded from the build.
Note: This is project convention used by example and demo projects provided with MPLAB Harmony. You, of course, may
organize your own projects any way you wish. But, we recommend following this convention if you use multiple configurations in
your projects. We think you'll appreciate the power and flexibility of it.
Configuration Files
• The "system_config.h" file
• The "system_init.c" file
• The "system_tasks.c" file
• The "system_int.c" file (optionally)
A set of three or four files normally make up a complete configuration of the system. The purpose of each of these files is
described in more detail in the following sections. But, the basic idea is that you may want different configurations of your
application for different physical hardware boards, different Microchip microcontrollers, or different feature sets, depending on
your specific needs.
Allowing different configurations of the same application logic makes your application more flexible and provides a
well-organized way to deal with the sort of variation that usually occurs in any project of sufficient size and complexity. This
technique helps to eliminate the duplication of code (and labor) that would otherwise be necessary to manage multiple related
projects. Of course, if you don't need or want that flexibility, all of these files are specifically created for your project and you can
make any modifications to them that you like. The choice is always yours.
1.1 1. First Time Users MPLAB Harmony Help Project Layout
1-11
Important!
The relative path, from the MPLAB X IDE project folder to the configuration folder (containing the "system_config.h" file) for each
project configuration must be placed in the "Includes directories" list in the compiler properties for each configuration of the
MPLAB X IDE project.
The "framework" folder
The "framework" logical folder contains the source files for the MPLAB Harmony framework and libraries. Depending on your
project configuration, there can be many, many files and sub folders under this folder. These files are for MPLAB Harmony
libraries that you should not need to edit. In fact, the framework source files are not normally located in your project. Instead,
these files are included in your project directly from the MPLAB Harmony installation (using relative directory paths). All of the
actual files stay in the MPLAB Harmony installation folder, out of the way.
Notes
1. You always have the option of copying the framework files directly into your project's source folder, if desired. In fact, doing so
is a good idea if you plan to move or distribute your project separately from the MPLAB Harmony installation.
2. In most cases, the "logical folder" organization within the MPLAB X IDE project matches exactly with the physical directory
organization within the MPLAB Harmony installation (and within your project directory) on your disk drive. This is done to keep
things simple and consistent so you only need to learn a single layout. But, there are a couple of notable exceptions.
• MPLAB has a convention of splitting out "Header Files" (".h" files) and "Source Files" (".c" files), so the virtual folder
organization in the MPLAB X IDE project separates the files in to these two groups and the physical directories on disk do
not.
• In an MPLAB Harmony example or demo project, the "app" folder will correspond to the "src" directory on disk under the
application's main folder.
1.1.4 The Main File
This topic describes the logic of the "main.c" file and the C-language "main" function in an MPLAB Harmony project.
Description
The C-language entry point for an MPLAB Harmony embedded application is the "main" function. This function is defined in the
"main.c" file, contained in the project's "app" folder (or "src" directory on disk). The "main" function (see example, below)
implements a simple "super loop", commonly used in embedded applications that do not make use of an operating system.
Example "main" Function Logic
int main ( void )
{
/* Initialize the system. */
SYS_Initialize ( NULL );
while ( true )
{
/* Perform system tasks. */
SYS_Tasks ( );
}
/* Should not come here during normal operation. */
SYS_ASSERT ( false , "Error! Exiting main" );
return ( EXIT_FAILURE );
}
The "SYS_Initialize" Function
1.1 1. First Time Users MPLAB Harmony Help The Main File
1-12
The first thing the main function does is call a function called "SYS_Initialize". The purpose of the "SYS_Initialize" function is to
initialize every software module in the system. MPLAB Harmony is based upon a model of cooperating state machines. So, this
function must ensure that every module's state machine is placed in a valid initial state. The implementation of this function is
one of the things that must be done to configure an MPLAB Harmony system. This function's definition is normally located in the
"system_init.c" file and is normally implemented by you since you're the only one who knows which software modules you want
to include in your project. However, MPLAB Harmony provide a project Configurator to help you get started.
Note: The "SYS_Initialize" function signature has a "void *" input parameter. This is so that it may later be implemented in a
library and an arbitrary initialization data structure may be passed into it. However, for a statically implemented "SYS_Initialize"
function (which will normally be the case if you implement it yourself), this parameter is unnecessary and can be passed as
"NULL". (Note: You could eliminate the parameter, but that may lead to future incompatibilities and the compiler will remove it
automatically for you when optimizations are enabled.)
The "Super Loop"
After all of the modules in the system have been initialized, the "main" function executes an infinite loop to keep the system
running. This is commonly called a "super loop" as it is the outer-most loop, within which the entire system operates. This loop
never exits. So, the code that exists after the end of that loop should never be executed and is only included there for safety,
clarity, and syntactical completeness.
The "SYS_Tasks" Function
Inside of the "super loop", the "main" function calls the "SYS_Tasks" function. The purpose of the "SYS_Tasks" function is to poll
every module in the system to ensure that it continues to operate. This is how the system maintains the state machine of all
polled modules. (Note that some modules may be interrupt driven and thus, not called from the "SYS_Tasks" function.) The
implementation of the "SYS_Tasks" function is also one of the things that you must normally do as part of the system
configuration, again because you are the only one who knows which modules you want to include in your project. You might also
have guessed that this function's definition is normally located in the "system_tasks.c" file. Of course, the MPLAB Harmony
project Configurator can help with this also.
1.1.5 The Application File(s)
This topic describes the normal structure of MPLAB Harmony application files.
Description
From the point of view of an MPLAB Harmony system, an application consists of two basic functions.
• APP_Initialize()
• APP_Tasks()
The application's initialization function (APP_Initialize) is normally called from the "SYS_Initialize" function, called from "main"
before entering the top-level loop. The application's "tasks" function (APP_Tasks) is normally called from the "SYS_Tasks"
function, called from "main" from inside the top-level loop. This is how the application's state machine is initialized and "polled" so
that it can do it's job. The "SYS_Initialize" function is normally implemented in the "system_init.c" file and the "SYS_Tasks"
function is normally implemented in the "sys_tasks.c" file. That is the convention for example and demo projects distributed with
MPLAB Harmony and that is the case for the sample project. You may do as you choose in your own projects, but we
recommend following this convention as it will make it easier to manage multiple configurations if you need them and it will be
consistent with the MPLAB Harmony project Configurator and other tools.
Application Initialization
An application's initialization function places the application's state machine in its initial state and may perform additional
initialization if necessary. This function must not block and it should not call the routines of any other modules that may block. If
1.1 1. First Time Users MPLAB Harmony Help The Application File(s)
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something needs to be initialized that may take time to complete, that initialization should be done in the application's state
machine (i.e. in it's "Tasks" function).
Sample Application Initialization Function:
void APP_Initialize( void )
{
/* Copy the message string to a buffer. */
strncpy(appData.buffer, APP_HELLO_STRING, APP_BUFFER_SIZE);
/* Prepare a buffer object for transfer using the USART driver. */
appData.bufferObject.buffer = appData.buffer;
appData.bufferObject.bufferSize = min(APP_BUFFER_SIZE, strlen(appData.buffer));
appData.bufferObject.flags = DRV_USART_BUFFER_FLAG_WRITE;
/* Place the App state machine in it's initial state. */
appData.state = APP_STATE_INIT;
}
The sample project's initialization function initializes an internal buffer to prepare a "Hello World" message for transmission on a
USART and places the application's state machine in its initial state by assigning the "APP_STATE_INIT" enumeration value into
the "state" member of the data structure that contains all of the data required by the application (appData). This structure is
defined globally, but is only ever accessed by the application itself. The application's initialization function is called from the
"SYS_Initialize" function (defined in "system_init.c") which is called from "main" after a system reset. Using this technique, the
application is initialized (along with the rest of the system) whenever the system comes out of reset.
Application Tasks
The application's state machine breaks up the job that the application must do into several short "tasks" that it can complete
quickly, but between which it must wait for some other module to complete some tasks of its own. (In this case the other module
is the USART driver.) Once each short task has completed successfully, the application transitions to another state to perform
the next short task.
Example Application Tasks Function:
void APP_Tasks( void )
{
/* Status of USART driver */
DRV_USART_CLIENT_STATUS usartStatus;
/* Status of buffer submitted to USART */
DRV_USART_BUFFER_STATUS bufferStatus;
/* Check the application state*/
switch ( appData.state )
{
/* Keep trying to open the driver until we succeed. */
case APP_STATE_INIT:
{
/* open an instance of USART driver */
appData.usartHandle = DRV_USART_Open(SYS_USART_DRIVER_INDEX,
DRV_IO_INTENT_READWRITE);
if (appData.usartHandle != DRV_HANDLE_INVALID )
{
/* Update the state */
appData.state = APP_STATE_WAIT_FOR_READY;
}
break;
}
/* Send the message when the driver is ready. */
case APP_STATE_WAIT_FOR_READY:
{
1.1 1. First Time Users MPLAB Harmony Help The Application File(s)
1-14
/* Get the USART driver status */
usartStatus = DRV_USART_ClientStatus( appData.usartHandle );
if ( usartStatus == DRV_USART_CLIENT_STATUS_READY )
{
/* Submit buffer to USART */
appData.usartBufferHandle = DRV_USART_BufferAdd(appData.usartHandle,
&appData.bufferObject);
if ( appData.usartBufferHandle != DRV_HANDLE_INVALID )
{
/* Buffer is accepted. Driver will transmit. */
appData.state = APP_STATE_WAIT_FOR_DONE;
}
}
break;
}
case APP_STATE_WAIT_FOR_DONE:
{
bufferStatus = DRV_USART_BufferStatus(appData.usartHandle,
appData.usartBufferHandle);
if ( DRV_USART_BUFFER_COMPLETED == bufferStatus )
{
/* Work is done, move to idle state. */
appData.state = APP_STATE_IDLE;
}
}
/* Idle state (do nothing) */
case APP_STATE_IDLE:
default:
break;
}
}
Sample Application States
The sample application's "tasks" function breaks the operation of the application down in to the following states using a "switch"
statement with the following "cases".
• APP_STATE_INIT
• APP_STATE_WAIT_FOR_READY
• APP_STATE_WAIT_FOR_DONE
• APP_STATE_IDLE
The sample application is placed into the "APP_STATE_INIT" state when by the application's initialization function before the
"tasks" function is ever called. So, the first time the "APP_Tasks" function is called, the switch statement executes the code
under this case and the first short "task" the sample application attempts to do is open the USART driver to obtain a handle so
that it can transfer data over the USART. Notice that the application checks the value of the handle returned from the
"DRV_USART_Open" function to ensure that it is valid before it transitions to the "APP_STATE_WAIT_FOR_READY" state. If
the value of the handle retuned be the driver's "open" function is invalid (equal to "DRV_HANDLE_INVALID"), then the
application stays in the "APP_STATE_INIT" state and keeps trying to open the USART driver every time it's "tasks" function is
called.
Once the application has a valid handle to the USART driver, it executes the code under the
"APP_STATE_WAIT_FOR_READY" case the next time its "APP_Tasks" function is called . In this state, the application calls a
USART driver status routine (DRV_USART_ClientStatus) to see if the driver is ready to transfer data . If the driver is ready, the
application calls a USART driver data transfer routine (DRV_USART_BufferAdd) to send the data buffer it prepared in the
"APP_Initiaize" function to the USART. Then, it checks the handle returned by the "DRV_USART_BufferAdd" routine to see if it
is valid. If the buffer handle is valid, it indicates that the USART driver has accepted the buffer and will take responsibility for the
1.1 1. First Time Users MPLAB Harmony Help The Application File(s)
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data transfer from that point forward. The application does not have to do anything else to cause the data transfer to occur, but it
may want to know when the transfer has completed, so it transitions to the "APP_STATE_WAIT_FOR_DONE" state. However, if
the buffer is not accepted by the driver (in which case the handle returned by the "DRV_USART_BufferAdd" function would be
invalid), the application stays in the "APP_STATE_WAIT_FOR_READY" and tries again the next time the "APP_Tasks" function
is called by the system (i.e. the "SYS_Tasks" function).
Once the application is in the "APP_STATE_WAIT_FOR_DONE" state, it calls a buffer status routine
(DRV_USART_BufferStatus) to check and see if the buffer it sent has completed. Note that it passes the handle value returned
from the "DRV_USART_BufferAdd" function (stored in the "usartBufferHandle" member of the global "appData" structure) into
the buffer status function to identify the buffer on which it wishes to check status. If the buffer status routine returns
"DRV_USART_BUFFER_COMPLETED", then the transfer has completed and the application transitions to the
"APP_STATE_IDLE" state where it stays and does nothing any time its "tasks" function is called. It's job is done! A more
complex application would go on to some other task or potentially begin the process again. But, this is a simple "Hello World"
sample application.
Note:
The application is normally initialized last, after all other modules in the system have been initialized. But, it should never assume
that any other module that it must call has completed its initialization when the application is initialized or when it's "tasks"
function is first called. Instead, it should always check the return value or status from any other module it calls to ensure that the
call succeeded before moving on to the next state. Following this rule makes applications more robust and allows then to handle
errors more effectively.
1.1.6 System Configurations
1.1.6.1 system_config.h
This topic describes the purpose of system configuration header file.
Description
System Configuration
In MPLAB Harmony, most library modules have a set of build time configuration options that define a variety of parameters (such
as buffer sizes, maximum or minimum limits, and default behavior). These configuration options normally have acceptable
default values. However, if you want to configure a library for your specific needs, its configuration options can be defined using
C-language pre-processor "#define" statements. The set of configuration options supported is described for each library in the
"Configuring the Library" section of its help document and most libraries provide a template and example configuration header
files in a "config" sub-folder under their "src" folder.
To obtain its build configuration options, every library includes the same common top-level configuration file that must be called
"system_config.h" and that must be defined as part of your application or, more specifically, as part of your system configuration.
The relative directory path to configuration directory that contains this file must be defined in the build properties of your project
so that the compiler can find it in it's include file search path.
Example Configuration "system_config.h" Header
// *****************************************************************************
// *****************************************************************************
// Section: Application Configuration
// *****************************************************************************
// *****************************************************************************
1.1 1. First Time Users MPLAB Harmony Help System Configurations
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/* Define the size of the application's message buffer. */
#define APP_BUFFER_SIZE 15
#define APP_UART_BAUDRATE 9600
/* Define the application's "hello world" message string. */
#define APP_HELLO_STRING "Hello World\r\n"
// *****************************************************************************
// *****************************************************************************
// Section: System Services Configuration
// *****************************************************************************
// *****************************************************************************
/* Define the index for the driver we'll use. */
#define SYS_USART_DRIVER_INDEX DRV_USART_INDEX_0
/* Define the hardware (PLIB) index associted with this instance of the driver. */
#define SYS_USART_ID USART_ID_2
// *****************************************************************************
// *****************************************************************************
// Section: UART Driver Configuration
// *****************************************************************************
// *****************************************************************************
#define DRV_USART_INSTANCES_NUMBER 1
#define DRV_USART_CLIENTS_NUMBER 1
#define DRV_USART_INTERRUPT_MODE false
#define DRV_USART_XFER_BUFFER_NUMBER 10
#define DRV_USART_INTERRUPT_SOURCE_TX INT_SOURCE_USART_2_TRANSMIT
#define DRV_USART_CONFIG_BYTE_Q_SIZE_TX 1
#define DRV_USART_CONFIG_BYTE_Q_SIZE_RX 1
#define DRV_USART_CONFIG_BLOCK_DEVICE_MODE
#define DRV_USART_INTERRUPT_MODE false
#define DRV_USART_INSTANCES_NUMBER 1
#define DRV_USART_CLIENTS_NUMBER 1
#define DRV_USART_INTERRUPT_SOURCE_TX INT_SOURCE_USART_2_TRANSMIT
#define DRV_USART_INTERRUPT_SOURCE_RX INT_SOURCE_USART_2_RECEIVE
The example above defines configuration options for the application, system services, and USART driver used in the
"pic32mx_default" configuration of the sample project..
1.1.6.2 system_init.c
This topic describes the purpose of the system initialization file.
Description
In an MPLAB Harmony project, the "SYS_Initialization" function is called from the "main" function in order to initialize all modules
in the system. This function is implemented as part of a system configuration, normally in a file called "system_init.c". This file
may also include other necessary global system items that must be implemented in order to initialize a system such as processor
configuration bits and system-wide global data structures.
Example "system_init.c" File
// ****************************************************************************
1.1 1. First Time Users MPLAB Harmony Help System Configurations
1-17
// ****************************************************************************
// Section: Configuration Bits
// ****************************************************************************
// ****************************************************************************
#pragma config FPLLODIV = DIV_1, FPLLMUL = MUL_20, FPLLIDIV = DIV_2
#pragma config FWDTEN = OFF, FCKSM = CSECME, FPBDIV = DIV_1
#pragma config OSCIOFNC = ON, POSCMOD = XT, FSOSCEN = ON, FNOSC = PRIPLL
#pragma config CP = OFF, BWP = OFF, PWP = OFF
#pragma config ICESEL = ICS_PGx2
// *****************************************************************************
// *****************************************************************************
// Section: Driver Initialization Data
// *****************************************************************************
// *****************************************************************************
static DRV_USART_INIT uartInit =
{
/* System module initialization */
.moduleInit = {0} ,
/* Identifies USART hardware module (PLIB-level) ID */
.usartID = SYS_USART_ID ,
/* Operation Modes of the driver */
.operationMode = DRV_USART_OPERATION_MODE_RS232 ,
/* Flags for the usart initialization */
.initFlags = 0 ,
/* Control the line control configuration */
.lineControlMode = DRV_USART_LINE_CONTROL_MODE_8NONE1 ,
/* Baud Rate value to be used, if not using auto baud */
.brgValue = APP_UART_BAUDRATE ,
/* Operation mode initialization data */
.operationModeInit = {{0}},
/* Handshake Mode */
.handShakeMode = DRV_USART_HANDSHAKE_MODE_NONE ,
/* Interrupt Source for TX Interrupt */
.txInterruptSource = INT_SOURCE_USART_2_TRANSMIT ,
/* Interrupt Source for RX Interrupt */
.rxInterruptSource = INT_SOURCE_USART_2_RECEIVE ,
/* Interrupt Source for Error Interrupt */
.errorInterruptSource = INT_SOURCE_USART_2_ERROR,
/* Receive Queue length */
.rxQueueSize = 3,
/* Transmit Queue length */
.txQueueSize = 3
};
// *****************************************************************************
// *****************************************************************************
// Section: System Data
// *****************************************************************************
// *****************************************************************************
1.1 1. First Time Users MPLAB Harmony Help System Configurations
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/* Structure to hold the sample application's system data. */
SAMPLE_SYSTEM_OBJECTS sysSample;
// ****************************************************************************
// ****************************************************************************
// Section: System Initialization
// ****************************************************************************
// ****************************************************************************
void SYS_Initialize ( void* data )
{
/* Inialize the system */
sysSample.usart = DRV_USART_Initialize(SYS_USART_DRIVER_INDEX, (SYS_MODULE_INIT
*)&uartInit );
/* Initialize the Application */
APP_Initialize ( );
}
In addition to the "SYS_Initialize" function implementation, the above example "system_init.c" file from the "pic32mx_default"
configuration of the "sample" project defines the processor configuration bits, a data structure used to initialize the USART driver,
and a global "sysSample" data structure used to hold a global handle to the USART driver object returned by the driver's
initialization function.
Notice that the "SYS_Initialize" function initializes first the driver, then the application. These are the only two active modules in
this system.
1.1.6.3 system_tasks.c
This topic describes the purpose of the system tasks file.
Description
Since MPLAB Harmony modules are state machine driven, they each have a "Tasks" function that must be called repeatedly
(from the system-wide "super" loop in "main" or from an ISR or OS thread). The "Tasks" functions are all called from the top-level
"SYS_Initialize" function that is normally implemented in a file called "system_tasks.c" that is part of a system configuration.
Example "system_tasks.c" File
void SYS_Tasks ( void )
{
/* Call the "tasks" functions for any modules in the system. */
DRV_USART_TasksTX(sysSample.usart);
/* Call the application's tasks routine */
APP_Tasks ( );
}
The "system_tasks.c" file for the "pic32mx_default" configuration of the "sample" project, contains only the implementation of the
"SYS_Tasks" function for that configuration. This function calls the USART driver's transmitter tasks function
"DRV_USART_TasksTX", passing in the driver's object handle returned from the driver's initialization routine, and it calls the
application's tasks function "APP_Tasks" to keep both the driver and the application's state machines running.
1.1.6.4 system_int.c
This topic describes the purpose of the system interrupts file.
1.1 1. First Time Users MPLAB Harmony Help System Configurations
1-19
Description
In an interrupt-driven configuration, any modules (such as drivers or system services) that can be driven from an interrupt must
have their interrupt-capable tasks function(s) called from an Interrupt Service Routine (ISR) "vector" function instead of from the
"SYS_Tasks" function. The form of the definition of the ISR vector function is dependent on what type of PIC microcontroller on
which the system is running. So, any vector functions required are normally implemented as part of the a specific system
configuration in a file normally called "system_int.c"
Example "system_int.c" File
void __ISR ( _UART_2_VECTOR ) _InterruptHandler_USART_2_stub ( void )
{
if ( SYS_INT_SourceStatusGet ( APP_USART_INT_SOURCE_TX ) )
{
/* Call the USART driver's "Tasks" routine */
DRV_USART_TasksTX ( sysSample.usart );
}
}
Notice that, in this example, the ISR function must determine if the interrupt occurred because of a transmitter (TX) interrupt
because on the PIC32 part used by this configuration of the application, this interrupt vector is shared with other types of
interrupts for this USART. Once it has determined that the interrupt is indeed a transmitter interrupt, the ISR calls the USART
driver's TX tasks routine and passed in the USART object handle returned from the driver's initialization function.
Note: The USART driver's "DRV_USART_TasksTX" function is interrupt capable when the USART driver is built with the correct
configuration options.
1.1.7 More Information
Describes what is available from the MPLAB Harmony web page.
Description
Information on MPLAB Harmony is available from microchip.com/harmony.
From this landing page, information on additional downloads, links to a MPLAB Harmony discussion forum, among others is
available.
1.1 1. First Time Users MPLAB Harmony Help More Information
1-20
1.2 2. Creating Your Own Applications
This section describes the steps necessary to create your own MPLAB Harmony applications.
Description
To support the framework, the application (or MPLAB Harmony "system") is responsible for the following:
1. Create a New Project: This can be accomplished by either running the MPLAB X IDE new project wizard or copying and
using a basic template located in the /apps/examples/templates directory. If you copy the template to a new
location, you may be required you to modify your include paths. To use the project wizard, select Microchip Embedded >
Standalone Project. Next, choose the device. The device you choose will determine what peripheral libraries are included in
your MPLAB Harmony project. Continue in the new project Wizard, selecting your hardware and software tools. When you
name and locate your project, there are two choices: 1) You can locate it in the ‘apps’ folder of the MPLAB Harmony
installation or 2) You can locate it outside of the Harmony installation. Placing the project in the ‘apps’ folder of MPLAB
Harmony will require you to copy it if you install a new version of MPLAB Harmony. Installing your project outside of the
MPLAB Harmony installation will require you to modify your include paths when a new version of MPLAB Harmony is
installed. It is recommend to use relative paths when installing in the ‘apps’ folder in MPLAB Harmony. Make sure that your
new project is set to the main (active) project.
2. Determine which MPLAB Harmony Modules are needed for your Application: Modules are divided into four categories;
Peripheral Libraries, System Services, Device Drivers and other libraries (commonly called middleware). To determine your
needs, read the MPLAB Harmony Overview and the Introductory sections for the modules of interest. Some modules have
dependencies while others do not. Peripheral Libraries have no dependencies. Drivers depend on peripheral libraries. System
Services depend on Peripheral Libraries and or Drivers. Your application or its middleware will typically use drivers or system
services.
3. Add the required Module Source Files to your Project: This can be accomplished by reading the help for each module to
determine what source files you need and manually entering them into your project. Alternatively, the MPLAB Harmony
Configurator can be used to select the modules from a list or tree and it will automatically insert the source files into your
project and optionally generate a skeletal template for your project. Note that some modules have multiple implementations
each optimized for different purposes. Others may implement optional features in multiple files. Be sure to select the source
file right for your implementation and be sure to include the pre-built peripheral library binary “.a” file for the processor you
selected in your project.
4. Configure The Modules: With the exceptions of the Peripheral Libraries, every MPLAB Harmony module will require some
set of build time configuration options implemented using ‘c’ language macros ‘#define’. Descriptions of the supported options
are available in the "Configuring the Library" section in the help document for every MPLAB Harmony library. These options
must be defined in the system_config.h header that is part of your project template generated by the MPLAB Harmony
Configurator. Every MPLAB Harmony source file that supports build time configuration options will include this header. As
such, this file must be part of every MPLAB Harmony Project.
5. Initialize System: This task involves completing the system_init.c file. First add the necessary configuration bits for your
processor. These are defined in the Special Features section of your device's data sheet. The next step is to complete the
SYS_Initialize function. Finish any necessary processor initialization (wait states, cache control, etc.) MPLAB Harmony may
provide services to accomplish this in the System Services Module. Initialize any features specific to the board that are not
initialized by other modules such as drivers or system services. Next, initialize all library modules selected in step 2 above
used by your application. To do this you must first define the initialization data structure for each module. This can be done
statically in the system_init.c file and passed in by pointer to the appropriate initialization function for each library. Needed
initialization structures can be found in the help section for each module. Add a call to the initialization function for each library
module into the SYS_Initialize function. Each initialization function will return an object handle for the module instance. These
should be captured so that they can be passed to the module task routine. Finally, add the call to APP_Initialize function into
the SYS_Initialize function.
6. Call System State Machine Tasks: The system must call the various task state machine functions at appropriate times. This
is accomplished by either adding the call into the SYS_Tasks function for polled modules or adding the call to the interrupt
handler for interrupt driven modules. The object handle saved during the initialization process is used as an argument for the
various task state machine functions. The SYS_Tasks function is typically implemented in the system_tasks.c file while the
interrupt handlers are defined in the system_int.c file.
1.2 2. Creating Your Own Applications MPLAB Harmony Help
1-21
7. Develop Application State Machine: You are now ready to develop your application. Since Harmony is based on
cooperative state machines, your application should also be state machine driven. At minimum, the APP_Initialize function
must put your application in its initial state. It may perform other initialization as long as it does not have to wait for other
modules. Any initialization that depends on other modules should be implemented as part of the application state machine.
Finally, complete your application functionality by implementing the APP_Tasks state machine function.
1.2 2. Creating Your Own Applications MPLAB Harmony Help
1-22
1.3 3. Release Notes & Information
This section contains release notes for this release and information on version numbers and release types.
1.3.1 Release Notes
Release notes for MPLAB Harmony v0.70b. Target Release Date: November 18, 2013.
Description
Please refer to Release Contents for a complete list of modules that are provided in this release.
MPLAB Harmony is a framework of system services, device drivers, and other libraries that are built upon a base of portable
peripheral libraries to provide flexible, portable, and consistent software “building blocks” which you can use to develop your
embedded PIC32 applications.
This is the first fully public release of MPLAB Harmony. Previous releases were internal to Microchip and had very limited
external distribution.
A complete list of the contents of this release is provided in the Release Contents section. You can find these contents under the
installation folder you selected in the following sub-folders:
• “apps” – Contains all demo and example applications provide with this installation.
• “bin” – Contains pre-built binary libraries (“.a” files) for the MPLAB Harmony peripheral libraries for each supported processor
and for key libraries provided in binary form.
• “bsp” – Contains MPLAB Harmony board support packages provided for selected Microchip demo and development boards.
• “build” – Provides MPLAB X IDE projects that you can use to re-build the libraries provide under the “bin” folder (in case you
want to use different build settings).
• “doc” – Contains the MPLAB Harmony help documentation in PDF and MPLAB X IDE “.nbm” plug-in formats.
• “framework” – Contains source code and API headers for all MPLAB Harmony libraries that are provided in source form.
• “third_party” – Contains MPLAB Harmony compatible libraries and Real-Time Operating Systems (RTOS) provided with this
installation.
• “utilities” – Contains design and development utilities and MPLAB X IDE plug-in utilities provided with MPLAB Harmony.
Please review the following key help topics (and their subtopics) to gain an initial understanding of what MPLAB Harmony is and
how to use it.
• Start Here > First Time Users
• Start Here > Creating your Own Applications
• MPLAB Harmony Configurator Help
• The “Introduction” sections of the individual help topics for the system services, drivers, and libraries that are of interest to you
• Applications Help > Applications Overview
• The “Introduction” sections of the individual applications help topics
Once you have a basic understanding of MPLAB Harmony, you can begin using the provided demo and example applications to
explore it’s capabilities and begin developing your own applications.
1.3 3. Release Notes & Information MPLAB Harmony Help Release Notes
1-23
Before developing your own applications, be sure to look at the example “template” application provided in the
“/apps/examples/templates” folder.
The following sections provide a brief overview of items that are new in this release and known issues at the time of the release.
Refer to the “Release Notes” section under the help topic for each individual library, application, or utility for additional details.
Refer to the “Using the Library” section for each individual library for a description of how to use library functions to accomplish
the tasks that the library was intended to support.
Refer to the “Library Interface” section for each individual library for a programmer’s reference or dictionary of functions and data
types defined by that library’s interface.
New This Release:
• Significant SD Card Driver improvements.
• The SPI driver has had configuration and interoperability improvements.
• The NVM driver now handles sector erasing during writes.
• USB Driver demonstrations
• TCP/IP Stack updates (see the TCP/IP Stack Library Help)
• Graphics Library API has been updated
• File System Service Library has been updated
• The following System Services have been added: Clock and Device Control
• USART Driver has been updated
• USB Driver has been updated
• Peripheral Libraries now support PIC32MZ devices
• FreeRTOS now supports PIC32MZ devices
• CyaSSL Library has been added
Known Issues:
• The SD Card driver has had limited testing and is missing a few desired features
• The SPI driver does not support slave mode or DMA
• The NVM driver has only been tested in it’s current memory configuration
• NVM Driver demonstration has limited testing
• SPI Driver demonstration has limited testing and hardware support
• USART Driver demonstration does not support PIC32MZ devices
• USB demonstrations (see the related Release Notes)
• USB Host Stack has limited testing and functional limitations (see the related Release Notes)
• USB Device Stack has limited testing and functional limitations (see the related Release Notes)
• No multi-display support for the Graphics Primitive Library
• File System Service Library does not support MIP16 mode, has limited testing and functional limitations (see the related
Release Notes)
• USART Driver has flow control and parity mode limitations and no multi-client support
• MRF24W Wi-Fi Driver Library has limited demonstration support and testing (see the related Release Notes)
1.3 3. Release Notes & Information MPLAB Harmony Help Release Contents
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1.3.2 Release Contents
This topic lists the contents of this release and identifies the individual version numbers of each module.
Description
This table lists the contents of this release, including a brief description of each module.
Cryptographic Applications:
/apps/crypto/
Crypto Demonstration Crypto Library Demonstration 1.00
Example Applications:
/apps/examples/
peripheral/blocking/pic32mz Simple blocking PLIB examples. 1.00
peripheral/blocking/pic32mx Simple blocking PLIB examples 1.00
state_driven Simple MPLAB Harmony compliant state-driven Peripheral Library
examples
1.00
sample Sample “Hello World” demonstration used in “Getting Started” guide in
Help system
N/A
DEMOS: Driver Application demos:
/apps/driver/
nvm demo NVM demonstration application 1.00
usart demo USART demonstration application 1.00
spi demo SPI demonstration application 1.00
DEMOS : RTOS Application demos:
/apps/rtos/
freertos FreeRTOS demonstration application 1.00
openrtos OpenRTOS demonstration application 1.00
File System Applications:
/apps/fs/
nvm_fat_single_disk Single-disk Non-Volatile Memory FAT FS Demonstration 1.00
nvm_sdcard_fat_multi_disk Multi-disk Non-Volatile Memory FAT FS Demonstration 1.00
sdcard_fat_single_disk SD Card FAT Disk demonstration 1.00
nvm_mpfs_single_disk Single-disk Non-Volatile Memory 1.00
nvm_sdcard_fat_mpfs_multi_disk Multi-disk Non-Volatile Memory FAT MPFS Demostration 1.00
DEMOS: Graphics Applications:
/apps/gfx/
lcc Low-Cost Controllerless Graphics Demonstration 4.00b
object Graphics Object Layer Demonstration 4.00b
primitive Graphics Primitives Layer Demonstration 4.00b
s1d13517 Epson S1D13517 LCD Controller Demonstration 4.00b
ssd1926 Solomon Systech SSD1926 Controller Demonstration 4.00b
1.3 3. Release Notes & Information MPLAB Harmony Help Release Contents
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DEMOS: TCP/IP Applications &
Utilities: /apps/tcpip/
tcpip_web_server TCP/IP Web Server Demonstration 1.01
bsd_tcp_server TCP/IP BSD Server Demonstration 1.00
bsd_tcp_client TCP/IP BSD Client Demonstration 1.00
bsd_udp_server TCP/IP BSD Server Demonstration 1.00
bsd_udp_client TCP/IP BSD Client Demonstration 1.00
tcpip_tcp_server TCP/IP TCP Server Demonstration 1.00
tcpip_tcp_client TCP/IP TCP Client Demonstration 1.00
tcpip_udp_server TCP/IP UDP Server Demonstration 1.00
tcpip_udp_client TCP/IP UDP Client Demonstration 1.00
wolf_ssl wolf ssl Demonstration 1.00
wifi_console TCP/IP Wi-Fi Console Demonstration
wifi_easyconf TCP/IP Wi-Fi Easy Configuration Demonstration
DEMOS: USB Device (Function)
Applications:
/apps/usb/device/
audio_speaker USB Audio Device Speaker Demonstration 1.00
cdc_com_port_dual CDC Dual Serial COM Ports Emulation Demonstration 1.00
cdc_com_port_single CDC Single Serial COM Port Emulation Demonstration 1.00
generic_device Microchip Generic USB Device Demonstration 1.00
hid_basic Basic USB Human Interface Device (HID) Demonstration 1.00
hid_joystick USB HID-Class Joystick Device Demonstration 1.00
hid_keyboard USB HID-Class Keyboard Device Demonstration 1.00
hid_mouse USB HID-Class Mouse Device Demonstration 1.00
msd_basic USB Mass Storage Device Demonstration 1.00
cdc_serial_emulator CDC Serial Emulation Demonstration 1.00
DEMOS: USB Host Applications:
/apps/usb/host/
msd_simple_thumb_drive USB MSD Host Simple Thumb Drive Demonstration 1.00
cdc_basic USB CDC Basic Demonstration 1.00
cdc_serial USB CDC Serial Demonstration 1.00
hid_keyboard USB HID-Class Joystick Host Demonstration 1.00
hid_mouse USB HID-Class Mouse Host Demonstration 1.00
generic_device Microchip Generic USB Host Demonstration 1.00
Pre-built Binaries: /bin/
framework/peripheral Pre-built Peripheral Libraries 1.00
framework/math/dsp Pre-built DSP libraries for PIC32MZ devices 1.00
framework/math/libq Pre-built fixed-point math libraries for PIC32MZ devices 1.00
1.3 3. Release Notes & Information MPLAB Harmony Help Release Contents
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Board Support Packages (BSPs):
/bsp/
explorer16/pic32mx795f512l Explorer 16 Development Board and PIC32MX795F512L PIM 1.00
sk_pic32_mx_usb PIC32 USB Starter Kit 1.00
sk_pic32_mz PIC32MZ Embedded Connectivity (EC) Starter Kit 1.00
usb_audio_pic32mx PIC32 USB Starter Kit II 1.00
gfx Graphics (GFX) boards 1.00
Documentation: /doc
doc/org-microchip-harmony_help.nbm MPLAB Harmony Help MPLAB X IDE Plug-In 0.70b
doc/harmony_help.pdf MPLAB Harmony Help 0.70b
Middleware & Libraries:
/framework/
Crypto (Software) Microchip Cryptographic Libraries 1.00
GFX Graphics Library 4.00b
MATH/DSP API header for PIC32MZ DSP Libraries 1.00
MATH/LIBQ API header for PIC32MX fixed-point libraries 1.00
AAC/MP3 Audio Decoder Libraries 1.00
TCP/IP TCP/IP Network Stack 7.10
USB Host USB Host Stack 0.02b
USB Device USB Device Stack 0.05b
Device Drivers:
/framework/driver/
adc Analog-to-Digital Converter Driver 0.01b
ethmac Ethernet Media Access Controller Driver 7.10
ethphy Ethernet Physical Interface Driver 7.10
gfx/gfx_lcc Low-Cost Controllerless Graphics Driver 4.00b
gfx/gfx_otm2201a OTM LCD Controller Driver 4.00b
gfx/gfx_s1d13517 Epson S1D13517 LCD Controller Driver 4.00b
gfx/gfx_ssd1926 Solomon Systech SSD1926 Controller Driver 4.00b
nvm Non-Volatile Memory Driver 0.50b
pmp Parallel Master Port Driver 0.50b
sdcard SD Card Driver (Client of SPI Driver) 0.50b
spi Serial Peripheral Interface (SPI) Driver 0.50b
tmr Timer Driver 0.50b
usart Universal Synchronous/Asynchronous Receiver/Transmitter (USART)
Driver
0.50b
usb/usbhs Universal Serial Bus (USB) Controller Driver 0.05b
wifi/mrf24w Wi-Fi MAC driver for the MRF24W controller 3.0.0
1.3 3. Release Notes & Information MPLAB Harmony Help Release Contents
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Operating System Abstraction Layer
(OSAL): /framework/osal
osal.h OSAL Interface 0.52b
osal_freertos.h
osal_freertos.c
OSAL Implementation for FreeRTOS 0.52b
osal_openrtos.h
osal_openrtos.c OSAL Implementation for OpenRTOS
0.52b
osal_impl_basic.h OSAL “bare metal” (no OS) implementation 0.52b
osal_imple_none.h OSAL implementation that removes the OSAL when not used 0.52b
osal_ucos3.h
osal_ucos3.c
OSAL Implementation for Micrium µCOS-III 0.52b
osal_ucos2.h
osal_ucos2.c
OSAL Implementation for Micrium µCOS-II N/A
osal_threadx.h OSAL Implementation for Express Logic ThreadX N/A
osal_threadx.c N/A
Peripheral Libraries: /
framework/peripheral Peripheral Library Source Code for all Supported PIC32 Processors 0.70b
Build Framework:
/build/framework/
crypto/test Test Vector App for crypto/zlib 1.00
crypto/zlib zlib library 1.00
crypto/crypto crypto library 1.00
peripheral Peripheral Library build project 1.00
math/libq libq library build project 1.00
math/DSP DSP library build project 1.00
System Services:
/framework/system/
clk Clock Services Library 0.04a
common Common Services 0.02a
devcon Devcon Services Library 0.02b
fs File System Services Library 0.50b
int Interrupt Services Library 0.04a
msg Message Services Library 0.01a
ports Input/Output Ports Services Library 0.02b
tmr Software Timer Services Library 0.02a
wdt Watchdog Timer Services Library 0.02b
Third-Party Software:
/third_party/
1.3 3. Release Notes & Information MPLAB Harmony Help Release Contents
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rtos/FreeRTOSV7.5.2 FreeRTOS Source Distribution v7.5 with support for PIC32MZ devices Yes
(Vendor
Version)
rtos/FreeRTOSVX.XX.XX FreeRTOS Source Distribution v7.5 with support for PIC32MX devices Yes
(Vendor
Version)
rtos/OpenRTOSVx.x.x OpenRTOS Source Distribution vx.x.x with support for PIC32MZ
devices
Yes
(Vendor
Version)
rtos/OpenRTOSVx.x.x OpenRTOS Source Distribution vx.x.x with support for PIC32MX
devices
Yes
(Vendor
Version)
uC/OS-III Micrium uC/OS-III Binary Demonstration with support for PIC32MZ
devices
Yes
(Vendor
Version)
uC/OS-III Micrium uC/OS-III Binary Demonstration with support for PIC32MX
devices
Maybe
(Vendor
Version)
uC/OS-II Micrium uC/OS-II Binary Demonstration (PIC32MZ)
uC/OS-II Micrium uC/OS-II Binary Demonstration (PIC32MX)
ThreadX Express Logic (ThreadX) Demonstration with Support for PIC32MZ
devices
CyaSSL Embedded SSL Library Open Source based demonstration 2.8.0
(Vendor
Version)
CyaSSL Embedded SSL Library Open Source based demonstration Yes
(Vendor
Version)
InterNiche Technologies, Inc. Suitable TCP/IP demonstrations Yes
(Vendor
Version)
Utilities: /utilities/
MPLAB Configurator MPLAB Harmony Project/Library Configurator MPLAB X IDE Plug-In 0.02a
gfx/gdd Graphics Display Designer 2.00b
gfx/grc Graphics Resource Compiler 4.00.39
mib2bib/mib2bib.jar Compiles Custom Microchip MIB script (snmp.mib) to generate
snmp.bib and mib.h
2.00
mpfs_generator/mpfs2.jar TCP/IP MPFS File Generator and Upload Utility 2.02.06
tcpip_discoverer/tcpip_discoverer.jar TCP/IP Microchip Node Discoverer Utility 2.00
1.3.3 Version Numbers
This section describes the version numbers and their meaning.
1.3 3. Release Notes & Information MPLAB Harmony Help Version Numbers
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Description
MPLAB Harmony Version Numbering Scheme
Libraries released with MPLAB Harmony each have their own version number, using the following scheme.
.[.<“dot”>][]
• Major revision (architecture or paradigm shift)
• Minor revision (new features, regular releases)
• “Dot” release (bug fixes, unscheduled releases)
• Release Type (‘a’ = alpha, ‘b’ = beta, Full release versions 1.0 or above have no type letter)
Items in square brackets are only present when needed (see examples, below).
Examples:
• MPLAB Harmony USB Library v2.6 (“dot” of ‘0’ implied)
• MPLAB Harmony Graphics Library v1.12.02
Note: The version number of the over all MPLAB Harmony release is not related to the version numbers of each individual
library or module included in the release and has no bearing on the versions of any libraries it includes. It is merely a way to keep
track of what libraries (and what versions of what libraries) are included in each release. Refer to the current release notes to
identify what libraries are included and what their version numbers are.
1.3.4 Release Types
This section describes the release types and their meaning.
Description
MPLAB Harmony module releases can be of three different types, based on the version type.
Alpha Release
An alpha release version of a module is usually an initial release. Alpha releases will have complete implementations of their
basic feature set, they are unit tested (usually by the original developer) and will build correctly in their basic configuration. An
1.3 3. Release Notes & Information MPLAB Harmony Help Release Types
1-30
alpha release is a great "preview" of what a new development Microchip is working on and it can be very helpful for exploring
new features. However, it has not gone through a formal test process and it is almost certain that some of its interface will
change before the full version is released. It is not recommended for production use.
Beta Release
A beta release version of a module has gone through the internal interface review process and has had formal testing of its
functionality. Also, issues reported from the alpha release will have been fixed or documented. When a module is in a beta
version, you can expect it to function correctly in normal circumstances and you can expect that its interface is very close to the
final form (although changes can still be made if required). However, it has not had stress testing or been tested and it may not
fail gracefully if used incorrectly. A beta release is not recommended for production use, but it can be used for development.
1.0+ Release
By the time a module is released as a 1.0 version or above, it is feature complete, fully tested, and its interface is "frozen". All
known issues from previous releases will have been fixed or documented. The existing interface will not change in future
releases. It may be expanded with additional features and additional interface functions, but existing interface functions will not
change. This is stable code with a stable Application Program Interface (API) that you can rely on for production purposes.
1.3 3. Release Notes & Information MPLAB Harmony Help Release Types
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1.4 4. Previous Releases
This topic contains information about past version(s) of MPLAB Harmony.
1.4.1 v0.51.03b
Release notes for MPLAB Harmony v0.51.03b.
Description
This topic contains the release notes for MPLAB Harmony v0.51.03b. Please refer to the Release Contents topic for a complete
list modules that are provided in this release.
This release will support MPLAB X IDE v1.95 and XC32 v1.30 tc9 and above.
New this Release
• Updated the Documentation
• Updated Peripheral Pre-Built Binary Libraries (".a" files)
• Added IPv6 API for generation of the Unique Local Address (ULA)
Known Issues
1. No documentation available for the Crypto libraries and peripheral libraries example applications.
2. For TCP/IP stack running on PIC32MZ platforms the write-back mode is not supported yet. Write-through has to be used for
now.
3. Early samples of the PIC32MZ silicon do not have a factory pre-programmed MAC address. This will cause the TCP/IP stack
and related applications to not properly run in most network configuration. Manual update of the related "network_config.h" file
with a valid MAC address is required.
4. The Wi-Fi driver for the TCP/IP stack and the supporting demos are not part of this release.
This table lists the contents of this release, gives a brief description
Module Description Version
File System Applications:
/apps/fs/
nvm_fat_single_disk Single-disk Non-Volatile Memory FAT FS Demonstration 0.02a
nvm_sdcard_fat_multi_disk Multi-disk Non-Volatile Memory FAT FS Demonstration 0.02a
sdcard_fat_single_disk SD-Card FAT Disk Demonstration 0.02a
nvm_mpfs_single_disk Single-disk Non-Volatile Memory MPFS Demonstration 0.02a
nvm_sdcard_fat_mpfs_multi_disk Multi-disk Non-Volatile Memory FAT MPFS Demonstration 0.02a
Graphics Applications:
/apps/gfx/
lcc Low-Cost Controllerless Graphics Demonstration 0.51b
object Graphics Object Layer Demonstration 0.51b
1.4 4. Previous Releases MPLAB Harmony Help v0.51.03b
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primitive Graphics Primitives Layer Demonstration 0.51b
ssd1926 Solomon Systech SSD1926 Controller Demonstration 0.51b
TCP/IP Applications & Utilities:
/apps/tcpip/
tcpip_web_server TCPIP Web Server Demonstration 7.02a
utilities/mpfs_generator/mpfs2.jar TCP/IP MPFS File Generator and Upload Utility 2.2.5
utilities/tcpip_dicoverer/tcpip_discoverer.jar TCP/IP Microchip Node Discoverer Utility 2.0
utilities/mib2bib/mib2bib.jar Compiles Custom Microchip MIB script ( snmp.mib) to generate
snmp.bib and mib.h
2.0
USB Device (Function) Applications:
/apps/usb/device/
audio_speaker USB Audio Device - Speaker Demonstration 0.51b
cdc_com_port_dual CDC Dual Serial COM Ports Emulation Demonstration 0.51b
cdc_com_port_single CDC Single Serial COM Ports Emulation Demonstration 0.51b
generic_device Generic USB Device Demonstration 0.51b
hid_basic USB Human Interface Device (HID) Demonstration 0.51b
hid_joystick USB HID Joystick Device Demonstration 0.51b
hid_keyboard USB HID Keyboard Device Demonstration 0.51b
hid_mouse USB HID Mouse Device Demonstration 0.51b
msd_basic USB Mass Storage Device Demonstration 0.51b
USB Host Applications:
/apps/usb/host/
cdc_serial USB CDC Host Demonstration 0.51b
Crypto Applications: /apps/
crypto Wolf SSL Cryptographic Demonstration 0.01a
PIC32MZ Applications: /apps/
pic32mz PIC32MZ Device Demonstration 0.51.01b
Example Applications:
/apps/examples
peripheral Peripheral Demonstration 0.51b
sample Sample Demonstration 0.51b
Board Support Packages
(BSPs): /bsp/
explorer16/pic32mx795f512l Explorer 16 Development Board and PIC32MX795F512L PIM
pic32_sk/pic32_usb_sk PIC32 USB Starter Kit
pic32_sk\pic32mz_sk PIC32MZ Starter Kit
pic32mx_usb_audio PIC32 USB Digital Audio Accessory Board
Third Party
Software: /third_party/
rtos/FreeRTOSV7.5.0 FreeRTOS Source Distribution v7.5.0 7.5.0
Middleware: /framework/
1.4 4. Previous Releases MPLAB Harmony Help v0.51.03b
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gfx Graphics Library 0.51b
tcpip TCP/IP Network Stack 7.02a
usb USB Host & Device Stack 0.51b
Crypto Library: /framework/
crypto Wolf SSL Cryptographic Libraries 0.01a
System Services:
/framework/system/
clk Clock Services Library 0.03a
debug Debug Services Library 0.01a
fs File System Services Library 0.02a
int Interrupt Services Library 0.03a
msg Message Services Library 0.01a
ports Input-Output Ports Services Library 0.01a
reset System Reset Services Library 0.01a
tmr Software Timer Services Library 0.01a
wdt Watchdog Timer Services Library 0.01a
Device Drivers:
/framework/driver/
adc Analog-to-Digital Converter Driver 0.01a
ethmac Ethernet Media Access Controller Driver 0.03a
ethphy Ethernet Physical Interface Driver 0.03a
gfx/gfx_lcc Low-Cost Controllerless Graphics Driver 0.51b
gfx/gfx_s1d13517 Epson S1D13517 LCD Controller Driver 0.51b
gfx/gfx_ssd1926 Solomon Systech SSD1926 Controller Driver 0.51b
nvm Non-Volatile Memory Driver 0.01a
pmp Parallel Master Port Driver 0.01a
sdcard SD Card Driver (Client of SPI Driver) 0.01a
spi Serial Peripheral Interface (SPI) Driver 0.01a
tmr Timer Driver 0.01a
usart Universal Synchronous/Asynchronous Receiver/Transmitter
(USART) Driver
0.01a
usb Universal Serial Bus (USB) Controller Driver 0.51b
usbhs Hi-Speed USB Controller Driver 0.51b
wifi Wi-Fi Driver 0.01a
Peripheral Libraries (PLIBs): /
framework/peripheral Peripheral Library Source Code 0.51b
bin/framework/peripheral Peripheral Pre-Built Binary Libraries for all PIC32 Processors 0.51b
build/framework/peripheral Project used for Peripheral Library Prebuilt Binary Libraries
Creation
0.51b
1.4 4. Previous Releases MPLAB Harmony Help v0.51.03b
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Operating System Abstraction Layer
(OSAL): /framework/osal/
osal.h
osal.c
OSAL interface 0.51b
osal_impl_none.h OSAL implementation that removes the OSAL when not used 0.51b
osal_impl_basic.h OSAL "bare metal" (no OS) implemenrtation 0.51b
osal_freertos.h
osal_freertos.c
OSAL implementation for FreeRTOS 0.51b
osal_ucos.h
osal_ucos.c
OSAL implementation for Micrium uCOS-III 0.51b
1.4 4. Previous Releases MPLAB Harmony Help v0.51.03b
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1.5 5. Tips and Tricks
This topic provides a few helpful tips and tricks to keep in mind while developing your MPLAB Harmony projects.
Description
You may find the following MPLAB Harmony "tips" and "tricks" helpful when developing your own MPLAB Harmony projects.
1. After creating a new MPLAB X IDE project, use the project wizard to add MPLAB Harmony libraries to your project and create
a set if initial files for your project. After that, your job is to ensure that the necessary initialization and configuration data and
definitions are in place and to write your own application.
2. You can use MPLAB Harmony example and demo projects to put together a "first approximation" of your application.
1. Copy the source files from the various example or demo apps to your project.
2. Rename the "APP_Initialize" and "APP_Tasks" functions so that they are all different and will build in your application by
simply appending a descriptive name to the end of the existing function names. (Note: you may also need to rename any
global data "objects" that conflict with each other from the examples).
3. Call the individual "APP_Initialize" and "APP_Tasks" functions from the "SYS_Initialize" and
"SYS_Tasks" functions in your application's configuration files.
4. Use the project wizard to add any required drivers, services, or middleware.
5. At this point, you now have your application made out of several independent state machines. Now, you can begin to
develop your own custom application code and modifying any of the code copied from the provided applications to behave
as you desire.
1.5 5. Tips and Tricks MPLAB Harmony Help
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1.6 6. Glossary
This section contains a glossary of general MPLAB Harmony terms.
Description
Glossary of Harmony Terms
Term Definition
Application One or more application modules define the over all behavior of an MPLAB Harmony system. Applications are
either demonstrations or examples provided with the installation or are implemented by you, using MPLAB
Harmony libraries to accomplish a desired task.
Client A client module is any module that uses the services (calls the interface functions) of another module.
Configuration An MPLAB Harmony configuration consists of static definitions (C-language "#define" statements), executable
source code, and other definitions in a set of files that are necessary to create a working MPLAB Harmony
system. (See Start Here for additional information.)
Configuration
Options
Configuration options are the specific set of "#define" statements that are required by any specific MPLAB
Harmony library to specify certain parameters (such as buffer sizes, minimum and maximum values, etc.) build
that library. Configuration options are defined in the "system_config.h" system-wide configuration header.
Driver A "driver" (AKA device driver) is an MPLAB Harmony software module designed to control and provide access
to a specific peripheral, either built into the microcontroller or external to it.
Driver Index Dynamic MPLAB Harmony drivers (and other dynamic modules) can manage the more than one instance of the
peripheral (and other resources) that they control. The "driver index" is a static index number (0, 1, 2,...) that
identifies which instance of the driver is to be used.
Note: The driver index is not necessarily identical to the peripheral index. The association between these two is
made when the driver is initialized.
Driver
Instance
An instance of a driver (or other module) consists of a complete set of the memory (and other resources)
controlled by the driver's code. Selection of which set of resources to control is made using a driver index.
Note: Even though there may be multiple instances of the resources managed by a dynamic driver, there is only
ever one instance of the actual object code. However, static drivers always maintain a 1:1 relationship between
resource and code instances.
Framework The MPLAB Harmony framework consists of a set of libraries (and the rules and conventions used to create
those libraries) that can be used to create MPLAB Harmony systems.
Initialization
Overrides
Initialization overrides are configuration options that can be defined to statically override (at build time)
parameters that are normally passed into the "Initialize" function of a driver or other MPLAB Harmony module.
This mechanism allows you to statically initialize a module, instead of dynamically initializing the module.
Interface The interface to a module is the set of functions, data types, and other definitions that must be used to interact
with that module.
Middleware The term "middleware" is used to describe any software that fits between the application and the device drivers
within an MPLAB Harmony system. It is something of a catch all term that is loosely used to describe libraries
that use drivers to access peripheral and then implement communication protocols (such as TCP/IP, USB
protocols, and graphics image processing) and other more complex processing that is required to use certain
peripherals, but is not properly part of controlling the peripheral itself.
Module An MPLAB Harmony software module is a closely related group of functions controlling a related set of
resources (memory and registers) that can be initialized and maintained by the system. Most MPLAB Harmony
modules provide an interface for client interaction. However, "headless" modules with no interface are possible.
1.6 6. Glossary MPLAB Harmony Help
1-37
Peripheral
Index
A peripheral index is a static label (usually an C-language "enum" value) that is used to identify a specific
instance of a peripheral.
Note: Unlike a driver index, which always starts at '0', a peripheral index may be internally represented as any
number, letter, or even a base address and the user should not rely on the value itself - only the label.
Peripheral
Instance
An instance of a peripheral is a complete set of the registers (and internal physical resources) necessary to
provide the core functionality of a given type of peripheral (either built into the microcontroller or external to it).
Note: A specific peripheral instance is identified using a peripheral index.
System An MPLAB Harmony system is a complete set of libraries, applications, and configuration items loaded and
executing on a specific hardware platform (microcontroller, board, and external peripherals) or the source items
necessary to build such a system.
Note: Since a system can multiple configurations, one MPLAB Harmony project may support multiple systems
through multiple supported configurations. See the demo applications included in the installation for examples.
System
Service
A system service is an MPLAB Harmony module that provides access to and/or control of common system
resources (memory and registers) with which other modules (drivers, middleware, libraries and application) may
interact.
Note: System services, much like drivers, manage sharing of resources so as to avoid conflicts between
modules that would otherwise occur if each module attempted to manage the share resource itself. But, unlike
drivers, system services do not normally need to be "opened" in order to use them.
1.6 6. Glossary MPLAB Harmony Help
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2 MPLAB Harmony Configurator Help
2 MPLAB Harmony Help
2-39
2.1 MPLAB Harmony Configurator
2.1.1 Introduction
This topic provides an overview of the MPLAB Harmony Configurator.
Description
The MPLAB Harmony Configurator is a MPLAB X IDE plug-in. It must be installed into your MPLAB X IDE installation to be used.
2.1.2 Release Notes
MPLAB Harmony Version: v0.70b Release Date: 18Nov2013
Description
====================================
Version 0.02a
MPLAB Harmony Configurator Plug-in
November 2013
====================================
Operating System Support
MPLAB Harmony Configurator Plug-in was tested on the following operating systems:.
• Windows XP SP3 and Windows 7
• Linux OS - Ubuntu
• Mac OS v8
Supported Features:
• Provides a simple hierarchical way for users to select the MPLAB Harmony modules to be used in the project and adds the
selected module source files with the necessary configuration and project settings (include path) into the created MPLAB X
IDE project.
• Supports importing project related files from relative path.
• Adds predefined source and header template files to the MPLAB X IDE project.
• Library Configuration is supported only for the TCP/IP and USB libraries.
Unsupported Features:
• System-related API calls are not added automatically to the system_init.c, main.c, and system_tasks.c files. Only the standard
C templates are added to the project. The application code must be added by the user in the application source and header
2.1 MPLAB Harmony Configurator MPLAB Harmony Help Release Notes
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files for a successful compilation of the project.
• Library Configuration is not supported for the Graphics library, OSAL, Drivers and Third-Party libraries. However, the
corresponding source and header files of the selected modules could be added to the created MPLAB X IDE project using this
Configurator.
Notes for Users:
1. The terms "MPLAB Configurator" and "MPLAB Configuration Wizard" are used interchangeably throughout the MPLAB
Harmony Help.
2. Check for "TODO" tags that are placed in added template files for directions on what sections in the code should be modified
or code to be added by the user. Look for system_config.h, system_init.c, system_int.c, system_tasks.c, app.c, app.h, and
main.c files.
Known Issues:
• The Configurator Plug-in generated template files are stored in the MPLAB X IDE project folder (inside the
MPLABX_Project.X folder). Users need to add the current directory ‘.’ Path in the MPLAB X Project “properties” > gcc >”
include path settings” for removing “the template file not found error”.
• The created project may compile but not work, as application and system related API calls are not added automatically to the
system_init.c, main.c and system_tasks.c. Only the standard C templates are added to the project.
• The MPLAB Harmony Configurator version during installation or in the plug-in description is shown as 0.0.2 where as the
actual version of the tool is “0.02a”.
• Certain TCP/IP configuration files are getting modified from the default MPLAB Harmony installation directory if the TCP/IP
stack is configured using the Configurator. It is recommended to backup these default configuration files: tcpip_config.h,
http_config.h, snmp_config.h, ssl_config.h, and telnet_config.h, in case it is necessary to revert back to the default
configuration.
• TCPIP system_config.h file is not modified in this release of the Configurator to add the configurations from “ *
*_config.h”. As explained above, the specific module files get updated.
• The Configurator is not preserving the previous project configuration if the TCP/IP sub-modules are selected using the ‘Select
to add default modules’ checkbox in the “TCPIP Stack -> tcpip” module tree.
• Warning message about ‘template files getting overwritten (if already present)’ is not shown if the USB library configuration is
selected.
2.1.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
2.1 MPLAB Harmony Configurator MPLAB Harmony Help SW License Agreement
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2.2 Using the Configurator
2.2.1 Installing the Configurator Plug-in
The MPLAB Harmony Configurator is a MPLAB X IDE plug-in. It must be installed into your MPLAB X IDE installation to be used.
Description
Location
The MPLAB Harmony Configurator (MPLAB X IDE plug-in) is located in the following folder in the MPLAB Harmony installation.
\utilities\configurator\com-microchip-harmonyconfigurator.nbm
Installation
1. Start MPLAB X IDE and select "Plugins" from the "Tools" menu as shown below.
2. Select the “Downloaded” tab.
3. Click the "Add Plugins..." button, browse to \utilities\configurator\ and open the plug in file
"com-microchip-harmonyconfigurator.nbm" as shown below
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4. Ensure that the Check box for the "MPLAB Harmony Configurator" plug-in is selected. Click "Install" as shown below.
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5. Follow the prompts from the installation wizard and continue until the installation completes. Just click "continue”. Once the
installation wizard has finished you can close the "Plugins" dialog box.
You should now see a "MPLAB Harmony Configurator" option under the "Tools" menu. This indicates that the project wizard was
successfully installed.
2.2.2 Running the Configurator Plug-in
This session describes how to run the MPLAB Harmony Configurator to add required files from selected modules into MPLAB X
IDE project.
Note: This version of the Configurator provides Project Configuration (to add files into MPLAB X IDE project) and limited Library
Configuration (only for configuring a few sub-modules of the TCP/IP and USB middleware) capability.
Description
1. To run the Configurator, select "MPLAB Harmony Configurator" from the "Tools" menu.
2. Browse to the root installation folder of the version of MPLAB Harmony that you're using. This folder must contain
"manifest.xml". This file has the information and the path of various software modules available in the installed MPLAB Harmony
version. manifest.xml file should not be moved or deleted from Root directory. Click "Next" when the root path is set.
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Note: It is recommended that you create and maintain your MPLAB X IDE project under a subdirectory of the
"/apps" folder and use a relative path to this project.
3. In the Left-hand pane of the "Select Modules and Configurations" dialog, select the desired modules and respective
sub-modules. The right-hand pane shows a brief introduction of the selected module. Click "Next" when the required modules for
the project are selected.
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The tool has two configuration sections.
• Project Configuration: All the required modules and Sub modules could be selected here. The respective files would be
added into the MPLAB X IDE project. (example: Graphics, TCP/IP, USB CDC, USB HID selection)
• Library Configuration: The individual configuration of each module could be done here. (Configuration for selected module
from the selected section.)
If the user is required to add their custom module into the MPLAB Harmony directory structure and add the files into the project
through Configurator, the manifest.xml should be modified to accommodate the custom module files. This would allow the
Project Configurator to add the files to the MPLAB X IDE project from the manifest.xml for the custom module. This would not
provide custom configuration capability, however the files can be added to the MPLAB X IDE project.
4. If there are any XML modifications those can be reflected by reloading the tree. To reload the project tree structure, right-click
on “harmony” tree node and click "Reload Tree".
5. To get back to default project configuration of MPLAB Harmony, right-click on “harmony” tree node and click "Load default".
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Note: Next window pane is for individual library (Modules and Sub modules) configuration. Currently only TCP/IP and USB
library configuration is supported.
Though all the sub-modules of TCP/IP can be enabled or disabled through project configuration window pane, the individual sub
module configuration is supported only for HTTP, SSL, SNMP and Telnet server. For USB, only CDC and HID class
configuration basic support is provided.
Library Configuration
1. In the "Project configuration" pane, to configure USB CDC select the respective modules and click “Next”. Next window pane
is Library Configuration window as shown below. Configure USB CDC as required, click “Next”.
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2. In the "Application Template" pane, select the "Include application template" check box and select "Finish" to add the module
files and template files to the MPLAB X IDE project.
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Note: The generate project may compile for PIC32MZ devices, but not necessarily work on the hardware.
The set of template files added to the MPLAB X IDE project would require to be modified with additional configuration information
and the custom application code.
Later versions of the configuration tool may provide additional configuration options and sample application code for each library,
to create a executable project.
2.2.3 Tutorial
This tutorial explains about creating a new MPLAB X IDE project and configuring this project using the MPLAB Harmony
Configurator. The tutorial provides step by step instructions on how to create a MPLAB X IDE project for the TCP/IP Stack.
Description
This tutorial explains about creating a MPLAB X IDE project for TCP/IP library by adding required configurations and TCP/IP
library files, template files and Peripheral Library modules to the selected MPLAB X IDE project using the Configurator.
In this tutorial user would,
1. Create a new project in MPLAB X IDE.
2. Add required source and header files with required configurations for TCP/IP application using MPLAB Harmony Configurator
to the MPLAB X IDE project.
3. Add the required Peripheral header files and template files to the MPLAB X IDE project.
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Creating an MPLAB X IDE Project
1. Open MPLAB X IDE, and select File > New Project to open a project explorer window.
2. In Categories, select “Microchip Embedded” and in Projects, select “Standalone Project”. Click Next.
3. Select the PIC device.
4. Select optional Debug Header. Click Next.
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5. Select a hardware tool and Click Next.
6. Select the appropriate compiler. Click Next.
7. Name the MPLAB X IDE project and specify its path.
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For this tutorial, create a project by name “MyHarmoyConfDemoProject”. Set the project as main project. Click Finish. Now the
project MyHarmonyConfDemoProject” is created.
Note: It is recommended that you maintain your project under a subdirectory of the "/apps" folder and use a relative
path to your project.
Once the MPLAB X IDE project is created, you should see a screen similar to the picture as shown below.
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Using MPLAB Harmony Configurator
1. After creating the MPLAB X IDE project, select “Tools -> MPALB Harmony Configuration wizard” to open this plug-in with
MPLAB X IDE.
"MPLAB Harmony Configurator" will open in a new dialogue, as shown below.
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2. Browse to the root directory path under "MPLAB Harmony Root Directory" option. This path is remembered by the
Configurator for subsequent usage.
Check or uncheck the "Relative Path" check box as required. Once the path is set, click "Next".
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3. Now configure required middleware modules and Peripheral Library modules.
Peripheral Library headers are selected by default by the tool. For this tutorial user will configure TCP/IP Library. Select the
required configuration modules of TCP/IP modules and also other middleware modules in the Tree structure. Click "Next" once
the selection is complete.
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For this release, both the TCP/IP and USB module Library Configuration Pane will appear. For this Tutorial, the TCP/IP module
is selected (default selection ”tcpip ”node) in tree, we get the Library Configuration as below.
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4. Select the required configurable items of TCP/IP, and click next (Next button in “Library configuration navigation pane) which
takes to next TCP/IP configuration pane, and continue until the last configuration pane. Once TCP/IP configuration is done, click
Next(Next button at the bottom of TCP/IP Library configuration pane) which takes into the next window "Application Template" to
include template files.
5. Select to Include MPLAB Harmony Application template files. Tool would add template files (main.c, app.c, system_init.c,
system_tasks.c, system_int.c, system_config.h and app.h) to MPLAB X IDE project. Click "Finish".
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6. Check for selected files being added in MPLAB X IDE project. The following figure shows the MPLAB X IDE project with the
added files.
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The "MPLAB Harmony Assembly Generator" window in MPLAB X IDE shows the list of files added from "MPLAB Harmony
Configurator" to the MPLAB X IDE project.
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3 Applications Help
3 MPLAB Harmony Help
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3.1 Applications Overview
Applications use MPLAB Harmony libraries and define the behavior of a system.
Description
Applications determine how MPLAB Harmony libraries (device drivers, middleware, and system services) are used to do
something useful. In an MPLAB Harmony system, there may be one main application, there may be multiple independent
applications or there may be one or more Operating System (OS) specific applications. Applications interact with MPLAB
Harmony libraries through well defined interfaces. Applications may operate in a strictly polling environment, they may be
interrupt driven, they may be executed in OS-specific threads, or they may be written so as to be flexible and easily configured
for any of these environments.
Applications generally fit into one of the following categories:
Demo Applications:
Demos applications are provided (with MPLAB Harmony or in separate installations) to demonstrate typical or interesting usage
models of one or more MPLAB Harmony libraries. Demonstration applications can demonstrate realistic solutions to real-life
problems.
Sample Applications:
Sample applications are extremely simple applications provided with MPLAB Harmony as examples of how to use individual
features of a library. They will not normally accomplish anything useful on their own. They are provided primarily as
"documentation" to show how to use a library.
Skeletal Applications:
Skeletal applications are provided as bare-bones “skeletons” (potentially targeted to a specific usage or market) that MPLAB
Harmony developers can use as a starting point to for writing their own applications. Skeleton applications contain the necessary
calls, configuration definitions and subroutine stubs with “To Do” items clearly marked for MPLAB Harmony developers to fill in
as desired to create a working application.
Customer Applications:
Customer applications are (of course) not provide by Microchip. Rather, they are any applications developed by customers to
suit specific hardware and software needs. Refer to the Start Here help topic for information on the structure and to learn how to
develop your own MPLAB Harmony applications.
Application Directories
Applications are contained in the "/apps" folder. Under the "apps" folder, they are grouped by technology, board,
and/or market segment.
Examples:
Folder Type of Demos
/apps/examples/peripheral Contains simple peripheral library example applications
/apps/fs Contains graphics library demonstration applications
/apps/gfx Contains TCP/IP networking stack demonstration applications
/apps/tcpip Contains USB device demonstration applications
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/apps/usb/device Contains USB host demonstration applications
Additional Information
Refer to Release Notes & Information for a complete listing of applications included with this release.
Refer to the help documentation for each individual application for build instructions and information on required hardware and
application usage.
3.1.1 System Overview
To support the framework, the application (or application developer) is responsible for the following:
• Configuring the Framework - Required, unless using a pre-built library. Each driver, middleware layer, and system service
require build-time configuration options that must be defined for the specific application, board, and processor that is used by
any particular demo or customer application. Please refer to the help file of that module on the list of configuration options,
and how they apply to the application.The application can use the board support package configuration file or define its own
configuration for the board.
• Building the Framework Library - Required, unless using a prebuilt library
• Implementing the System Initialization service. Please refer to the help file for the system initialization service for
information on implementing it statically or dynamically
• Implementing a Interrupt Service Routine (ISR) - Required, unless polled. Please refer to the help file for system tasks
service for examples on implementing ISRs.
• Implementing the System Tasks routine - Please refer to the help file for system tasks service for how to implement it
statically or dynamically
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3.2 File System Demonstrations
3.2.1 Introduction
MPLAB Harmony File System Demonstration Help
Description
This help file contains instructions and associated information about MPLAB Harmony File System demonstration applications,
which are contained in the MPLAB Harmony Library distribution.
3.2.2 Release Notes
MPLAB Harmony Version: v0.70b File System Demonstrations Version : 0.01a Release Date: 18Nov2013
The interface can change in the beta and\or 1.0 release.
For the latest release information, please refer to the File System Service Library Release Notes section.
New This Release:
Nothing to report for this release.
Known Issues:
Nothing to report for this release.
3.2.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
3.2 File System Demonstrations MPLAB Harmony Help SW License Agreement
3-64
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
3.2.4 Demonstrations
Provides instructions on how to run the demonstration applications.
Description
The following demonstration applications are available in this release of the MPLAB Harmony File System framework.
3.2.4.1 Overview
Provides an overview of how most of the File System Demonstration applications are structured.
Description
The MPLAB Harmony File System Demonstration Applications show example usage of the File System framework. These
demonstration applications also contain example configurations of media drivers such as Internal Flash and SD Card, that can
be used readily in the end application with the some changes to initialization parameters, if required. A demonstration application
may have multiple MPLAB X IDE project configurations (for different demonstration hardware and microcontrollers). The relevant
configuration should be selected in the MPLAB X IDE before compiling the demonstration. Figure 1 shows the dialog box in
MPLAB X IDE that allows selection of different configurations.
Figure 1: Demonstration MPLAB X IDE Configurations
The project will contain files which are configuration specific. Wherever applicable, these configuration files are placed in
separate MPLAB X IDE project logical folders. Figure 2 shows how the configuration dependant nvm_disk_images.c file is
included in the project. In this case two configurations (pic32mx_usb_sk_Int_dyn and pic32mz_sk_int_dyn) are supported in the
project.
Figure 2: Configuration specific file in File System Demonstration Projects.
Note that some demonstration projects may not support all configurations. In general, the following the demonstration project
contain the following MPLAB X IDE configurations:
• pic32mx_usb_sk_int_dyn: This configuration runs on the PIC32 USB Starter Kit. The media drivers are configured for
interrupt and dynamic operation
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• pic32mz_sk_int_dyn: This configuration runs on the PIC33MZ Embedded Connectivity (EC) Starter Kit. Some demonstration
projects that support this configuration may need the Multimedia Expansion Board II (MEB II) to attached to the starter kit. The
media drivers in this configuration are configured for interrupt and dynamic operation.
Unless specified, the File System demonstration application are structured as indicated in Figure 3.
Figure 3: File System Demonstration Application General Architecture
Here are some general notes while working with the demonstration applications:
1. The system and application is initialized in SYS_Initialize() function, implemented in sys_init.c. The sys_init.c file is
configuration specific. The SYS_Initialize() function initializes the application (APP_Initialize() function) and the BSP
(BSP_Initialize() function).
2. The application then calls SYS_Tasks() function in an infinite loop. This function updates the state machines of all system
components in the demonstration application and also calls the APP_Tasks() function. The is implemented in file sys_tasks.c
which is configuration specific.
3. All Interrupt service routines are implemented in sys_interrupt.c. This file is configuration specific.
3.2.4.2 nvm_fat_single_disk
This demonstration uses a FAT12 image of file on NVM flash memory and demonstrates the working of all file system functions.
Description
This demonstration shows an example of implementing a FAT12 disk in device Flash memory. The demonstration contains a
FAT12 disk image consisting of a Master Boot Record (MBR) sector, Logical Boot Sector, File Allocation Table, Root Directory
Area. The demonstration opens an existing file named "FILE.TXT" and performs all file system related function calls on the file
viz. SYS_FS_FileStat, SYS_FS_FileSize, SYS_FS_FileSeek, SYS_FS_FileEOF. Finally, the string "Hello World" is written to this
file. The file is then closed and reopend for read. The read string is then compared with the string which was written to the file. If
the string compare is successful, LED indication is provided.
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3.2.4.2.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Following board is supported for PIC32MX devices: -
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
Following board is supported for PIC32MZ devices: -
Demonstration Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.2.4.2.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.2.4.2.3 Running the Demonstration
Provides instructions on how to build and run the NVM FAT single disk demonstration.
Description
Select the MPLAB X IDE project configuration: -
• pic32mx_usb_sk_int_dyn -- For PIC32MX devices
• pic32mz_sk_int_dyn -- For PIC32MZ devices
Build the selected configuration in the MPLAB X IDE project and program the demonstration board. The execution status
(pass/fail) of the demonstration is indicated by LEDs on the demonstration board.
Demonstration Board Demonstration Successful Demonstration Failure
PIC32 USB Starter Kit II LED3 LED1
PIC32MZ Embedded Connectivity (EC) Starter Kit Green LED Red LED
About the demonstration:
This demonstration shows an example of
- implementing a FAT12 disk in device Flash memory.
- opening a file for read or write.
- implements all the file system functions.
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- closing a file.
The demonstration contains a FAT12 disk image consisting of a Master Boot Record (MBR) sector, Logical Boot Sector, File
Allocation Table, Root Directory Area. This image is implemented in the file nvm_disk_images.c (this is project configuration
specific file and is contained in the nvm_disk_images logical folder in the MPLAB X IDE project). The image contains a single file
named "FILE.TXT" which contains the string "Data".
The demonstration opens an existing file named "FILE.TXT" and performs all file system related function calls on the file viz.
SYS_FS_FileStat, SYS_FS_FileSize, SYS_FS_FileSeek, SYS_FS_FileEOF. Finally, the string "Hello World" is written to this file.
The file is then closed and reopened for read. The read string is then compared with the string which was written to the file. If the
string compare is successful, LED indication is provided.
The demonstration application logic is implemented as a state machine in the APP_Tasks() function in the file main.c.
1. The disk is first mounted using the SYS_FS_Mount() function. The "/dev/nvma1" path instructs the mount command to mount
an internal flash volume. The volume is mounted against a FAT type file system and mounted at "/mnt/myDrive/".
2. If the mount is successful, the application opens a file "FILE.TXT" for reading and writing
(SYS_FS_FILE_OPEN_READ_PLUS) with a SYS_FS_FileOpen() function. The valid file handle is received once a successful
opening of file is performed.
3. If file open is successful, the status of file "FILE.TXT" is stored in the appData.fileStatus structure, using SYS_FS_FileStat()
function.
4. If the file status check is successful, the size of the "FILE.TXT" is checked by passing the file handle to the SYS_FS_FileSize()
function.
5. If the file size check is successful, the size of file is compared with the size element received earlier as a part of
appData.fileStatus structure. If both value matches, then the code moves to the next step of file seek.
6. The file pointer is then moved by 4 bytes from the start of the file by calling the function SYS_FS_FileSeek() and passing
parameter as SYS_FS_SEEK_SET (seek from the beginning of the file).
7. If the file seek operation is successful, the file pointer should have reached the end of the file. This is because, the content of
the FILE.TXT had only 4 byte string = "Data". The end of file is verified by calling the function SYS_FS_FileEOF(). If the function
returns "true" (end of file reached), the next step is performed.
8. In the next step, the file pointer is moved again by [(-1)*size of file], from the end of the file by calling the function
SYS_FS_FileSeek() and passing parameter SYS_FS_SEEK_END (seek from the end of the file).
9. If the file seek operation is successful, the file pointer should have reached the beginning of the file. 4 Bytes are read from the
file using SYS_FS_FileRead() function (into a buffer).
10. If the read is successful, the content of file (present in the buffer) is compared with the "Data" string. If the comparison
passed, the code moves to the next step.
11. In the next step, the file pointer is moved again by [(-1)*size of file], from the end of the file by calling the function
SYS_FS_FileSeek() and passing parameter SYS_FS_SEEK_END (seek from the end of the file).
12. If the file seek operation is successful, the string "Hello World" is written to the file using SYS_FS_FileWrite() function.
13. If the write operation is successful, the file is closed.
14. The file "FILE.TXT" is opened again in read mode (SYS_FS_FILE_OPEN_READ).
15. If the file open is successful, the content of the file is read using SYS_FS_FileRead() function (into a buffer).
16. If the read operation is successful, the content of the file (present in the buffer) is compared with the "Hello World" string
using the strcmp() function. A LED indicates the success of the demonstration.
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3.2.4.3 sd_card_fat_single_disk
This demonstration uses the SDTM Card with FAT file system as media and performs a read/ write / verify operation on the files
using long file names (LFN).
Description
This demonstration shows an example of using the MPLAB Harmony File System to access and modify the contents of an SDTM
Card. The demonstration opens a file "FILE_TOO_LONG_NAME_EXAMPLE_123.JPG" on the SD Card, reads the content of
the file and writes the content into another file "FILE_TOO_LONG_NAME_EXAMPLE_123_1.JPG" (create a copy of one file into
another file).
The input file "FILE_TOO_LONG_NAME_EXAMPLE_123.JPG" is not provided along with the release package. It could be any
arbitrary JPG (picture) file chosen by user and then suitably renamed to "FILE_TOO_LONG_NAME_EXAMPLE_123.JPG". The
reason for choosing a JPG file for test purpose is that the duplicate file "FILE_TOO_LONG_NAME_EXAMPLE_123_1.JPG"
created by the FS demonstration could be easily verified for correctness by inserting the SD card in computer and opening the
"FILE_TOO_LONG_NAME_EXAMPLE_123_1.JPG" file. If the file "FILE_TOO_LONG_NAME_EXAMPLE_123_1.JPG" opens
for viewing on the computer, the test is deemed to have passed. Otherwise, if the
"FILE_TOO_LONG_NAME_EXAMPLE_123_1.JPG" does not open (is corrupted), the test will be considered as failed.
3.2.4.3.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Following board is supported for PIC32MX devices: -
Demonstration Board (click link for board information)
PIC32MX795F512L Plug-In-Module (PIM)
PICtail Daughter Board for SD and MMC
Note: This board can not be used by itself. An Explorer 16 Development Board is required.
Following board is supported for PIC32MZ devices: -
Demonstration Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit -
Note: This board can not be used by itself. An Multimedia Expansion Board II (MEB II) is required to run the demonstration.
3.2.4.3.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
Explorer 16 Development Board Based Demonstrations
Use the following instructions for all Explorer 16 Development Board-based demonstration boards:
PIC32MX795F512L PIM
1. Insert the PIM into the Explorer 16 Development Board PIM connector.
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2. Jumpers JP1, JP2 and JP3 on the SD Card PICtail Daughter Board should connect to points 2 and 3 on their respective
connectors as shown here.
3. Insert the SD Card PICtail Daughter Board into the PICtail Plus connector on the Explorer 16 Development Board.
4. Insert a SD card into the SD card connector on the SD Card PICtail Daughter Board.
5. Power up the board.
Multimedia Expansion Board II (MEB II)
No hardware setting change is required. Insert the micro SD card into the connector and power up the board.
3.2.4.3.3 Running the Demonstration
Provides instructions on how to build and run the SD card FAT single disk demonstration.
Description
Select the MPLAB X IDE project configuration: -
• exp16_32mx_int_dyn -- For PIC32MX devices
• pic32mz_sk_int_dyn -- For PIC32MZ devices
Insert the SD card, which contains the file "FILE_TOO_LONG_NAME_EXAMPLE_123.JPG". The file can be of any size.
Compile the selected configuration in the MPLAB X IDE project and run the code. After a few seconds, once the LED glows,
remove the SD card from the SD Card PICtail Daughter Board (for PIC32MX) or MEB2 Board (for PIC32MZ) and insert it into the
SD card reader on a PC. Examine the contents of the SD card and another file named
"FILE_TOO_LONG_NAME_EXAMPLE_123_1.JPG" would have been created.
"FILE_TOO_LONG_NAME_EXAMPLE_123_1.JPG" will be a copy of "FILE_TOO_LONG_NAME_EXAMPLE_123.JPG". Verify
both the files opens for viewing on the PC.
Demonstration Board Demonstration Successful Demonstration Failure
Explorer 16 Development Board LED5 (D5) LED6 (D6)
PIC32MZ Embedded Connectivity (EC) Starter Kit Green LED Red LED
About the demonstration:
This demonstration shows an example of
- implementing a FAT File system (FAT16/ FAT32) on SD card.
- implementing long file name (LFN).
- opening a file for read or write.
- closing a file.
The demonstration opens a file "FILE_TOO_LONG_NAME_EXAMPLE_123.JPG" on the SD Card, reads the content of the file
and writes the content into another file "FILE_TOO_LONG_NAME_EXAMPLE_123_1.JPG" (create a copy of one file into
another file).
The demonstration application logic is implemented as a state machine in the APP_Tasks() function in the file main.c.
1. The disk is first mounted using the SYS_FS_Mount() function. The "/dev/mmcblka1" path instructs the mount command to
mount a SD card volume. The volume is mounted against a FAT type file system and mounted at "/mnt/myDrive/".
2. If mount is successful, the volume is unmouned by passing the mount name "/mnt/myDrive" to SYS_FS_Unmount() function.
This unmounting is done for demonstration purpose only. Real application do not need to unmount unless it is required for the
application.
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3. If unmount is successful, the mounting process is repeated.
4. If the mount is successful, the application opens a file "FILE_TOO_LONG_NAME_EXAMPLE_123.JPG" for reading with a
SYS_FS_FileOpen() function.
3. If the file open is successful, the application opens a file "FILE_TOO_LONG_NAME_EXAMPLE_123_1.JPG" for writing with
SYS_FS_FileOpen() function. The attributes for file write is selected as "SYS_FS_FILE_OPEN_WRITE". Hence, if the file does
not exist on the drive, the file is created.
4. If the file open is successful, 512Bytes from the file "FILE_TOO_LONG_NAME_EXAMPLE_123.JPG" is read into application
buffer using SYS_FS_FileRead() function.
5. If the file read successful, the 512Bytes is written from the application buffer to the
FILE_TOO_LONG_NAME_EXAMPLE_123_1.JPG file using SYS_FS_FileWrite() function.
6. If the write operation is successful, the end of file for FILE_TOO_LONG_NAME_EXAMPLE_123.JPG is checked. If the end of
file is not reached, the process of reading and writing continues (step - 4 and step - 5).
7. Once end of file is reached, both the files are closed with SYS_FS_FileClose() function.
8. Finally, a LED indicates the success of the demonstration.
3.2.4.4 nvm_sdcard_fat_multi_disk
This demonstration uses NVM and SDTM Card as 2 media and reads files from one media and write onto another media.
Description
This demonstration shows an example of using the MPLAB Harmony File System to access files across multiple media. The
demonstration contains a FAT12 disk image consisting of a Master Boot Record (MBR) sector, Logical Boot Sector, File
Allocation Table, Root Directory Area, placed in the internal flash memory (NVM). Also, a SD card is used as another disk, which
might have FAT16 or FAT32 implemented on it (depends on the formatting of SD card).The demonstration reads the contents of
"FILE.TXT" in NVM and copies the contents to "FILE.TXT" in the SDTM Card. If the write operation is successful, LED indication
is provided.
3.2.4.4.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Following board is supported for PIC32MX devices: -
Demonstration Board (click link for board information)
PIC32MX795F512L Plug-In-Module (PIM)
PICtail Daughter Board for SD and MMC
Note: This board can not be used by itself. An Explorer 16 Development Board is required.
Following board is supported for PIC32MZ devices: -
Demonstration Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit -
Note: This board can not be used by itself. An Multimedia Expansion Board II (MEB II) is required to run the demonstration.
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3.2.4.4.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
Explorer 16 Development Board Based Demonstrations
Use the following instructions for all Explorer 16 Development Board-based demonstration boards:
PIC32MX795F512L PIM
1. Insert the PIM into the Explorer 16 Development Board PIM connector.
2. Jumpers JP1, JP2 and JP3 on the SD Card PICtail Daughter Board should connect to points 2 and 3 on their respective
connectors as shown here.
3. Insert the SD Card PICtail Daughter Board into the PICtail Plus connector on the Explorer 16 Development Board.
4. Insert a SD card into the SD card connector on the SD Card PICtail Daughter Board.
5. Power up the board.
Multimedia Expansion Board II (MEB II)
No hardware setting change is required. Insert the micro SD card into the connector and power up the board.
3.2.4.4.3 Running the Demonstration
Provides instructions on how to build and run the NVM SD card FAT multi disk demonstration.
Description
Select the MPLAB X IDE project configuration: -
• exp16_32mx_int_dyn -- For PIC32MX devices
• pic32mz_sk_int_dyn -- For PIC32MZ devices
Insert the SD card, which contains the file "FILE.TXT" and the file contains "abc" (some arbitrary existing content).
Compile the selected configuration in the MPLAB X IDE project and run the code. After a few seconds, once the LED glows,
remove the SD card from the Board and insert it into the SD card reader on a PC. Examine the contents of the file named
"FILE.TXT". The file should contain the string "This data is from NVM Disk".
Demonstration Board Demonstration Successful Demonstration Failure
Explorer 16 Development Board LED5 (D5) LED6 (D6)
PIC32MZ Embedded Connectivity (EC) Starter Kit Green LED Red LED
About the demonstration:
This demonstration shows an example of:
- implementing a multi disk demonstration with FAT12 on internal flash memory (NVM) and FAT File system (FAT16/ FAT32) on
SD card.
- opening two files from two different disks, read content of file from first disk and write into the file of second disk.
- closing the files.
The demonstration contains a FAT12 disk image consisting of a Master Boot Record (MBR) sector, Logical Boot Sector, File
Allocation Table, Root Directory Area, placed in the internal flash memory (NVM). Also, a SD card is used as another disk, which
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might have FAT16 or FAT32 implemented on it (depends on the formatting of SD card).The demonstration reads the contents of
"FILE.TXT" in NVM and copies the contents to "FILE.TXT" in the SDTM Card. If the write operation is successful, LED indication
is provided.
The demonstration application logic is implemented as a state machine in the APP_Tasks() function in the file main.c.
1. The first disks is mounted using the SYS_FS_Mount() function. The "/dev/nvma1" path instructs the mount command to mount
a internal flash volume. The volume is mounted against a FAT type file system and mounted at "/mnt/myDrive1/".
2. If the mount is successful, the second disks is mounted using the SYS_FS_Mount() function. The "/dev/mmcblka1" path
instructs the mount command to mount a SD card volume. The volume is mounted against a FAT type file system and mounted
at "/mnt/myDrive2/".
3. If the mount is successful, the application opens a file "FILE.TXT" from "/mnt/myDrive1/" for reading and "FILE.TXT" from
"/mnt/myDrive2/" for writing with a SYS_FS_FileOpen() function.
4. If the file open is successful, the application reads 27Bytes from "FILE.TXT" of internal flash volume using
SYS_FS_FileRead().
5. If the read is successful, the application closes the "FILE.TXT" from internal flash volume and then writes the 27Bytes into
"FILE.TXT" of SD card volume using SYS_FS_FileWrite().
6. If the write is successful, the application closes the "FILE.TXT" from SD card volume.
7. If file close is successful, LED indicates the success of the operation.
3.2.4.5 nmv_mpfs_single_disk
This demonstration uses a MPFS image of 3 files on NVM flash memory and demonstrates the working of all file system
functions.
Description
This demonstration shows an example of implementing a MPFS disk in device Flash memory. The demonstration contains a
MPFS disk image in the internal flash memory. The disk image contains 3 files named: -
"FILE.txt" , Size = 11Bytes. The content of the file is -- "Hello World".
"ABC.txt", Size = 31744Bytes. The content of the file is not important. Just a file of sufficiently big size.
"TEST.txt" , Size = 72Bytes. The content of the file is -- "This file contains a test string and it is meant for testing. 1234567890".
The demonstration performs all file system related function calls on the file viz. SYS_FS_FileRead, SYS_FS_FileStat,
SYS_FS_FileSize, SYS_FS_FileSeek, SYS_FS_FileEOF. If all the test succeeds, LED indication is provided.
3.2.4.5.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Following board is supported for PIC32MX devices: -
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
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Following board is supported for PIC32MZ devices: -
Demonstration Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.2.4.5.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.2.4.5.3 Running the Demonstration
Provides instructions on how to build and run the NVM MPFS single disk demonstration.
Description
Select the MPLAB X IDE project configuration: -
• pic32mx_usb_sk_int_dyn -- For PIC32MX devices
• pic32mz_sk_int_dyn -- For PIC32MZ devices
Build the selected configuration in the MPLAB X IDE project and program the demonstration board. The execution status
(pass/fail) of the demonstration is indicated by LEDs on the demo board.
Demonstration Board Demonstration Successful Demonstration Failure
PIC32 USB Starter Kit II LED3 LED1
PIC32MZ Embedded Connectivity (EC) Starter Kit Green LED Red LED
About the demonstration:
This demonstration shows an example of
- implementing a MPFS disk in device Flash memory.
- opening a file for read.
- implements all the file system functions.
- closing a file.
This demonstration shows an example of implementing a MPFS disk in device Flash memory. The demonstration contains a
MPFS disk image in the internal flash memory. The disk image contains 3 files named: -
"FILE.txt" , Size = 11Bytes. The content of the file is -- "Hello World".
"ABC.txt", Size = 31744Bytes. The content of the file is not important. Just a file of sufficiently big size.
"TEST.txt" , Size = 72Bytes. The content of the file is -- "This file contains a test string and it is meant for testing. 1234567890".
The demonstration application logic is implemented as a state machine in the APP_Tasks() function in the file main.c.
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1. The disk is first mounted using the SYS_FS_Mount() function. The "/dev/nvma1" path instructs the mount command to mount
an internal flash volume. The volume is mounted against a MPFS2 type file system and mounted at "/mnt/myDrive/".
2. If the mount is successful, the application opens a file "FILE.txt" for reading with a SYS_FS_FileOpen() function.
3. If the open is successful, the application opens another file "TEST.txt" for reading with SYS_FS_FileOpen() function.
4. If open is successful, the application checks the status of another file "ABC.txt" using SYS_FS_FileStat() function and stores
the status of the file into the structure "appData.fileStatus".
5. If file status check is successful, the application compares the size of file (from "appData.fileStatus" structure) with the known
value of 31744 (Bytes).
6. If the comparison is successful, the application checks for size of file "FILE.txt", by passing the handle obtained during file
open, to the function SYS_FS_FileSize().
7. If the file size matches the known value of 11 (Bytes), the application moves the file pointer for the file "TEST.txt" 10Bytes from
the end of file, using the function SYS_FS_FileSeek().
8. If file seek is successful, 10 Bytes of content of the file "TEST.txt" is read into the application buffer, using the function
SYS_FS_FileRead().
9. If read is successful, the application buffer content is compared with the known string of "1234567890" using the strncmp()
function.
10. If the comparison is successful, the application checks if the file pointer for file "TEST.txt" has reached the end of file using
the SYS_FS_FileEOF() function.
11. If end of file is reached, a LED indicates the success of the demonstration.
3.2.4.6 nvm_sdcard_fat_mpfs_multi_disk
This demonstration uses NVM and SDTM Card with MPFS and FAT image of file and performs a read/ write/ verify operation
from file of one media to another media.
Description
This demonstration shows an example of using the MPLAB Harmony File System to access files across multiple disks and
multiple file system. The demonstration contains a MPFS disk image in the internal flash memory. The disk image contains a file
named "abc.txt" with content "Hello World". Another disk is a SD card, which is formatted to FAT (FAT16 or FAT32). The
demonstration reads the contents of "abc.txt" from the disk implemented on internal flash memory and writes the contents to
"FILE.TXT" on the SDTM Card. A successful write is indicated by a LED glow.
3.2.4.6.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Following board is supported for PIC32MX devices: -
Demonstration Board (click link for board information)
PIC32MX795F512L Plug-In-Module (PIM)
PICtail Daughter Board for SD and MMC
Note: This board can not be used by itself. An Explorer 16 Development Board is required.
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Following board is supported for PIC32MZ devices: -
Demonstration Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit -
Note: This board can not be used by itself. An Multimedia Expansion Board II (MEB II) is required to run the demonstration.
3.2.4.6.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
Explorer 16 Development Board Based Demonstrations
Use the following instructions for all Explorer 16 Development Board-based demonstration boards:
PIC32MX795F512L PIM
1. Insert the PIM into the Explorer 16 Development Board PIM connector.
2. Jumpers JP1, JP2 and JP3 on the SD Card PICtail Daughter Board should connect to points 2 and 3 on their respective
connectors as shown here.
3. Insert the SD Card PICtail Daughter Board into the PICtail Plus connector on the Explorer 16 Development Board.
4. Insert a SD card into the SD card connector on the SD Card PICtail Daughter Board.
5. Power up the board.
Multimedia Expansion Board II (MEB II)
No hardware setting change is required. Insert the micro SD card into the connector and power up the board.
3.2.4.6.3 Running the Demonstration
Provides instructions on how to build and run the NVM SD card FAT MPFS multi disk demonstration.
Description
Select the MPLAB X IDE project configuration: -
• exp16_32mx_int_dyn -- For PIC32MX devices
• pic32mz_sk_int_dyn -- For PIC32MZ devices
Insert the SD card, which contains the file "FILE.TXT" and the file contains "abc" (some arbitrary existing content).
Compile the selected configuration in the MPLAB X IDE project and run the code. After a few seconds, once the LED glows,
remove the SD card from the SD Card PICtail Daughter Board and insert it into the SD card reader on a PC. Examine the
contents of the file named "FILE.TXT". The file should contain the string "Hello World".
Demonstration Board Demonstration Successful Demonstration Failure
Explorer 16 Development Board LED5 (D5) LED6 (D6)
PIC32MZ Embedded Connectivity (EC) Starter Kit Green LED Red LED
About the demonstration:
This demonstration shows an example of
- implementing a multi disk demonstration with MPFS on internal flash memory (NVM) and FAT File system (FAT16/ FAT32) on
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SD card.
- opening two files from two different disks, read content of file from first disk and write into the file of second disk.
- closing the files.
The demonstration contains a MPFS disk image in the internal flash memory. The disk image contains a file named "abc.txt" with
content "Hello World". Another disk is a SD card, which is formatted to FAT (FAT16 or FAT32). The demonstration reads the
contents of "abc.txt" from the disk implemented on internal flash memory and writes the contents to "FILE.TXT" on the SDTM
Card. A successful write is indicated by a LED glow.
The demonstration application logic is implemented as a state machine in the APP_Tasks() function in the file main.c.
1. The first disks is mounted using the SYS_FS_Mount() function. The "/dev/nvma1" path instructs the mount command to mount
a internal flash volume. The volume is mounted against a MPFS2 type file system and mounted at "/mnt/myDrive1/".
2. If the mount is successful, the second disks is mounted using the SYS_FS_Mount() function. The "/dev/mmcblka1" path
instructs the mount command to mount a SD card volume. The volume is mounted against a FAT type file system and mounted
at "/mnt/myDrive2/".
3. If the mount is successful, the application opens a file "abc.txt" from "/mnt/myDrive1/" for reading and "FILE.TXT" from
"/mnt/myDrive2/" for writing with a SYS_FS_FileOpen() function.
4. If the file open is successful, the application reads 13Bytes from "abc.txt" of internal flash volume using SYS_FS_FileRead().
5. If the read is successful, the application closes the "abc.txt" from internal flash volume and then writes the 13Bytes into
"FILE.TXT" of SD card volume using SYS_FS_FileWrite().
6. If the write is successful, the application closes the "FILE.TXT" from SD card volume.
7. If file close is successful, LED indicates the success of the operation.
3.2.5 Demonstration Board Information
Information on Hardware used by the File System Demonstration Applications.
Description
The File System Library Demonstration Applications can be tried across different hardware boards. This section provide details
on these hardware boards.
3.2.5.1 PIC32 USB Starter Kit II
Hardware Information:
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SW1 - Application switch. Tied to RD6.
SW2 - Application switch. Tied to RD7.
SW3 - Application switch. Tied to RD13.
LED1 - Application LED. Tied to RD0.
LED2 - Application LED. Tied to RD1.
LED3 - Application LED. Tied to RD2.
More Information
Product webpage
3.2.5.2 Explorer 16 Development Board
Hardware Information:
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S1 - Reset button (MCLR)
S2 - Processor switch. This switch determines which processor is running, the processor on the board or the processor on the
Plug-In-Module (PIM).
S3, S4, S5, S6 - Application switches. For information about what pin is connected to this switch, please refer to the information
for the PIM in use.
D3 through D10 - Application LEDs. For information about what pin is connected to this LED, please refer to the information for
the PIM in use.
More Information:
Product webpage
3.2.5.3 PIC32MX795F512 Plug-In-Module (PIM)
More Information
Product webpage
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3.2.5.4 PICtail Daughter Board for SD and MMC
More Information:
Product webpage.
3.2.5.5 PIC32MZ Embedded Connectivity (EC) Starter Kit
Provides details information on the PIC32MZ Embedded Connectivity (EC) Starter Kit.
Description
Microchip Part Number: DM320006 (without Crypto) or DM320006-C (with Crypto)
The top assembly of the board includes these key features, as indicated in Figure 1:
1. PIC32MZ2048ECH144 32-bit microcontroller.
2. Green power indicator LED.
3. On-board crystal or oscillator for precision microcontroller clocking (12 MHz).
4. USB connectivity for on-board debugger communications.
5. Green debug indicator LED.
6. Three push button switches for user-defined inputs.
7. Three user-defined indicator LEDs.
8. USB Type A receptacle connectivity for PIC32 host-based applications.
9. HOST mode power jumper.
10. Daughter board connectors for flexible Ethernet PHY options.
11. 32 kHz oscillator for RTCC and Timer1 (optional).
12. External 2 GB SQI memory for expanded memory application.
13. Jumper for using or disconnecting the on-board debugger.
NOTE: When running self-powered USB device applications, open the jumper JP1 to prevent possibly back-feeding voltage onto
the Vbus from one port on the host to another (or from one host to another).
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Figure 1: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Front)
The bottom assembly of the board includes these key features, as indicated in Figure 2:
1. PIC24FJ256GB106 USB microcontroller for on-board debugging.
2. Regulated +3.3V power supply for powering the starter kit via USB or expansion board.
3. Connector for various expansion boards.
4. USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 OTG/device-based applications.
5. 50 MHz Ethernet PHY oscillator.
6. USB Host and OTG power supply for powering PIC32 USB applications.
Figure 2: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Back)
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3.2.5.6 Multimedia Expansion Board II (MEB II)
Provides details information on the Multimedia Expansion Board II (MEB) II.
Description
Microchip Part Number: DM320005-2
Product Page
The front side of the MEB II includes these key features, as shown in Figure 1:
1. Display daughter board connector (60-pin Hirose board-to-board connector).
2. mTouch™ buttons.
3. Push Button.
4. Power LED.
5. User LEDs.
6. VGA Camera (OVM7690).
7. PICtail™ Connector.
8. Analog temperature sensor.
Figure 1: Multimedia Expansion Board II Layout (Front)
The underside of the MEB II includes these key features, as shown in Figure 2:
1. Regulated 5V and 3.3V power supply for powering the board via a 9-15V DC Adapter.
2. PIC32 Starter Kit connector (168-pin Hirose board-to-board connector).
3. 24-bit stereo audio codec (AK4953A).
4. Integrated 802.11bg wireless module (MRF24WG0MA).
5. Low-cost Bluetooth® HCI transceiver (BTM805).
6. EBI SRAM memory (IS61WV102416BLL).
7. microSD slot.
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8. Analog accelerometer (ADXL325).
Figure 2: Multimedia Expansion Board II Layout (Back)
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3.3 Graphics Demonstrations
3.3.1 Introduction
Graphics Library Demonstrations Applications Help
Description
This distribution package contains a variety of Graphics-related firmware projects that demonstrate the capabilities of the MPLAB
Harmony Graphics library. This help file describes the hardware requirement and procedures to run these firmware projects on
Microchip graphics boards.
To know more about MPLAB Harmony Graphics, configuring the library and the APIs provided; refer to the Graphics Library
documentation.
Graphic Demonstration Description
Primitive Cyclically demonstrates various types of shapes and images, which include circles, lines, and
rectangles that can be created from the Graphics Library.
Object Touch interactive demonstration of various pages of objects that can be created from the
Graphics Library.
ssd1926 Touch interactive demonstration of JPEG decoded images from an SD card utilizing the JPEG
decoder of the Solomon Systech SSD1926 graphics controller.
lcc Demonstrates the advanced capabilities of the Graphics Library utilizing the software graphics
controller.
3.3.2 Release Notes
MPLAB Harmony Version: v0.70b Graphics Demonstrations Version : 4.00b Release Date: 18Nov2013
New This Release:
Nothing to report for this release.
Known Issues:
LCC Demonstration: For the PIC32MZ Embedded Connectivity (EC) Starter Kit, after programming, the application may not
display the UI folders as expected. If this occurs, to activate the UI display, touch the screen in the folder icons area. This issue
will be addressed in the next release of MPLAB Harmony.
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3.3.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
3.3.4 Demonstrations
This topic provides information on how to run the Graphics Library demonstration applications included in this release.
Description
All demonstrations provided should be built using the MPLAB X IDE development environment tool supplied by Microchip.
The information that follows, communicate the general steps to building the graphics demos.
• Using MPLAB X IDE, click the File drop-down, select "Open Project...". Navigate to your Harmony installation folder. The
default location on Windows will be: C:\Microchip\Harmony\\apps\gfx.
• In the \app\gfx folder there will be the object, primitive, lcc, and ssd1926 demonstration applications.
• Within each demonstration folder, there will be a firmware folder. In the firmware folder will exist the MPLAB X IDE project
specific to each demonstration.
• Select the project and click "Open Project"
• To configure the project specific to a preset board configuration, right click on the project and select "Set Configuration". This
will set the build configuration to match the supported board configuration.
3.3.4.1 lcc_demo
Demonstrates the advanced capabilities of the Graphics Library utilizing the software graphics controller.
Description
This demonstration provides the ability to display alpha blend and gradient colors through the software graphics controller. The
demonstration renders four folders for alpha blend, gradient, picture-in-picture (PIP), and performance for all PIC32 devices.
For PIC32MX devices, the demonstration runs on the PICtail Plus LCC Daughter Board, and on PIC32MZ devices, it runs on the
Multimedia Expansion Board II (MEB II).
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3.3.4.1.1 Supported Demonstration Boards
Lists supported demo and development hardware boards.
Description
Demo Board (click link for board information) Notes
PIC32 USB Starter Kit II -
Graphics PICtail LCC Board AC164144 -
WQVGA 480x272 Board AC164127-6 -
Multimedia Expansion Board II (MEB II) -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.3.4.1.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
Multimedia Expansion Board II (MEB II)
The MEB II has two memory options: External or Internal. This demonstration requires External EBI memory, which is configured
using the following J9 jumper settings:
• EBIOE and LCD_PCLK (jumper is closed)
• EBIWE (jumper is open)
3.3.4.1.3 Running the Demonstration
Provides instructions on how to build and run the LCC demo.
Description
Select one of the following build configurations to build the LCC demo:
• pic32mxusbsk_pictaillcc_wqvga -- For PIC32MX devices
• pic32mzsk_meb2_wqvga -- For PIC32MZ devices
Build the selected configuration in the MPLAB X IDE project and program the demonstration board. The demonstration renders
four folders for alpha blend, gradient, picture-in-picture (PIP), and performance. Touch one of the folders to activate the
demonstration.
Short Name Long Name
pic32mxusbsk PIC32 USB Starter Kit II
pic32mzsk PIC32MZ Embedded Connectivity (EC) Starter Kit
meb2 Multimedia Expansion Board II (MEB II)
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wqvga Graphics Display Powertip 4.3" 480 × 272 Board (AC164127-6)
3.3.4.2 primitive_demo
An example of primitive drawing capabilities of the Graphics Library.
Description
The Primitive example demonstrates the various types of shapes and images which include: circles, lines, rectangles that exist in
the Graphics Library.
This example shows the following primitives:
• GFX_LineDraw
• GFX_CircleDraw
• GFX_CircleFillDraw
• GFX_RectangleRoundDraw
• GFX_RectangleRoundFillDraw
• GFX_RectangleFillDraw
• GFX_ArcDraw
• GFX_PolygonDraw
• GFX_FontSet
• GFX_TextStringXYPut
• GFX_ImageDraw
• GFX_ScreenClear
3.3.4.2.1 Supported Demonstration Boards
Lists supported demo and development hardware boards.
Description
Following boards are supported for PIC32MX devices:
Demo Board (click link for board information) Notes
PIC32 USB Starter Kit II -
Graphics LCD Controller PICtail Plus SSD1926 Board AC164127-5 -
QVGA 320x240 Board AC164127-4 -
Following board is supported for PIC32MZ devices:
Demo Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit -
Multimedia Expansion Board II (MEB II) -
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3.3.4.2.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.3.4.2.3 Running the Demonstration
Provides instructions on how to build and run the primitive demo.
Description
Navigate to the apps/gfx/primitive/firmware folder and open the primitive project, and then select one of the following build
configurations to build the Primitive demo:
• pic32mxusbsk_pictails1d_wqvga -- For PIC32MX devices
• pic32mxusbsk_pictailssd_qvga -- For PIC32MX devices
• pic32mzsk_meb2_wqvga -- For PIC32MZ devices
Once the project is loaded and executed on the target board, a continuous display of primitive graphics will appear on the LCD.
Short Name Long Name
pic32mxusbsk PIC32 USB Starter Kit II
pic32mzsk PIC32MZ Embedded Connectivity (EC) Starter Kit
pictails1d Graphics LCD Controller PICtail Plus S1D1357 Board
pictailssd Graphics LCD Controller PICtail Plus SSD1926 Board
meb2 Multimedia Expansion Board II (MEB II)
qvga Graphics Display Truly 3.2" 240 × 320 Board (AC164127-4)
wqvga Graphics Display Powertip 4.3" 480 × 272 Board (AC164127-6)
3.3.4.3 object_demo
An example of standard user-interface widgets of the Graphics Library.
Description
The Object example demonstrates the standard types of objects/widgets that exist in the Graphics Library Graphics Object Layer
(GOL). The demonstration is composed of several pages of examples.
The demonstration requires that the user touch the screen to begin the demo. The user is expected to navigate to the next or
previous page by selecting the buttons on the far right and left locations of the screen.
This example shows the following widgets:
• GFX_GOL_ButtonCreate
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• GFX_GOL_ButtonTextSet
• GFX_GOL_CheckboxCreate
• GFX_GOL_GroupboxCreate
• GFX_GOL_RadioButtonCreate
• GFX_GOL_GroupboxCreate
• GFX_GOL_StaticTextCreate
• GFX_GOL_ScrollBarCreate
• GFX_GOL_ProgressBarCreate
• GFX_GOL_ListboxCreate
• GFX_GOL_ScrollBarCreate
• GFX_GOL_Editbox_Create
• GFX_GOL_MeterCreate
• GFX_GOL_DigitalMeterCreate
• GFX_GOL_RoundDialCreate
• GFX_GOL_PictureCreate
• GFX_GOL_CustomControlCreate
3.3.4.3.1 Supported Demonstration Boards
Lists supported demo and development hardware boards.
Description
Following boards are supported for PIC32MX devices:
Demo Board (click link for board information) Notes
PIC32 USB Starter Kit II -
Graphics LCD Controller PICtail Plus SSD1926 Board AC164127-5 -
QVGA 320x240 Board AC164127-4 -
Following board is supported for PIC32MZ devices:
Demo Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit -
Multimedia Expansion Board II (MEB II) -
3.3.4.3.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
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No hardware related configuration or jumper setting changes are necessary.
3.3.4.3.3 Running the Demonstration
Provides instructions on how to build and run the object demo.
Description
Navigate to the apps/gfx/object/firmware and open the object project, and then select one of the following build configurations to
build the Object demo:
• pic32mxusbsk_pictailssd_qvga -- For PIC32MX devices
• pic32mzsk_meb2_wqvga -- For PIC32MZ devices
Once the project is loaded and executed on the target board, various objects are displayed. Touch the forward or back arrow to
view additional objects.
Short Name Long Name
pic32mxusbsk PIC32 USB Starter Kit II
pic32mzsk PIC32MZ Embedded Connectivity (EC) Starter Kit
pictailssd Graphics LCD Controller PICtail Plus SSD1926 Board
meb2 Multimedia Expansion Board II (MEB II)
qvga Graphics Display Truly 3.2" 240 × 320 Board (AC164127-4)
3.3.4.4 ssd_demo
Shows how to display JPEG images using the Solomon Systech (SSD1926) graphics controller that resides on the PICtail™
Plus SSD1926 Board.
Description
The SSD1926 demo shows how to decode of JPEG images from an SD card utilizing the JPEG decoder capabilities of the
Solmon Systech SSD1926 graphics controller.
3.3.4.4.1 Supported Demonstration Boards
Lists supported demo and development hardware boards.
Description
Following board is supported for PIC32MX devices:
Demo Board (click link for board information) Notes
PIC32 USB Starter Kit II -
Graphics LCD Controller PICtail Plus SSD1926 Board AC164127-5 -
QVGA 320x240 Board AC164127-4 -
3.3.4.4.2 Configuring the Hardware
Describes how to configure the supported hardware.
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Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
3.3.4.4.3 Running the Demonstration
Provides instructions on how to build and run the SSD1926 demo.
Description
Navigate to the apps/gfx/ssd1926/firmware and open the ssd1926 project, and then select one of the following build
configurations to build the SSD1926 demo:
• pic32mxusbsk_pictailssd_qvga -- For PIC32MX devices
Once the project is loaded and executed on the target board, various JPEG images, which are stored on a SD card are
displayed.
Short Name Long Name
pic32mxusbsk PIC32 USB Starter Kit II
pictalssd Graphics LCD Controller PICtail Plus SSD13517 Board
qvga Graphics Display Truly 3.2" 240 × 320 Board (AC164127-4)
3.3.5 Demonstration Board Information
This topic provides specific information about the development boards available for the demonstration applications.
3.3.5.1 PIC32 USB Starter Kit II
Provides information on the PIC32 USB Starter II.
Description
SW1 - Application switch. Tied to RD6.
SW2 - Application switch. Tied to RD7.
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SW3 - Application switch. Tied to RD13.
LED1 - Application LED. Tied to RD0.
LED2 - Application LED. Tied to RD1.
LED3 - Application LED. Tied to RD2.
This board supports the following USB Device demonstrations:
• CDC Single COM port (cdc_com_port_single).
• CDC Dual COM port (cdc_com_port_dual)
• HID Basic (hid_basic)
• HID Mouse (hid_mouse)
• HID Keyboard (hid_keyboard)
• HID Joystick (hid_joystick)
• MSD Flash Drive (msd_basic)
• Generic USB Device (generic_device)
More Information
Microchip Part Number : DM320003-2
3.3.5.2 PIC32MZ Embedded Connectivity (EC) Starter Kit
Provides details information on the PIC32MZ Embedded Connectivity (EC) Starter Kit.
Description
Microchip Part Number: DM320006 (without Crypto) or DM320006-C (with Crypto)
The top assembly of the board includes these key features, as indicated in Figure 1:
1. PIC32MZ2048ECH144 32-bit microcontroller.
2. Green power indicator LED.
3. On-board crystal or oscillator for precision microcontroller clocking (12 MHz).
4. USB connectivity for on-board debugger communications.
5. Green debug indicator LED.
6. Three push button switches for user-defined inputs.
7. Three user-defined indicator LEDs.
8. USB Type A receptacle connectivity for PIC32 host-based applications.
9. HOST mode power jumper.
10. Daughter board connectors for flexible Ethernet PHY options.
11. 32 kHz oscillator for RTCC and Timer1 (optional).
12. External 2 GB SQI memory for expanded memory application.
13. Jumper for using or disconnecting the on-board debugger.
NOTE: When running self-powered USB device applications, open the jumper JP1 to prevent possibly back-feeding voltage onto
the Vbus from one port on the host to another (or from one host to another).
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Figure 1: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Front)
The bottom assembly of the board includes these key features, as indicated in Figure 2:
1. PIC24FJ256GB106 USB microcontroller for on-board debugging.
2. Regulated +3.3V power supply for powering the starter kit via USB or expansion board.
3. Connector for various expansion boards.
4. USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 OTG/device-based applications.
5. 50 MHz Ethernet PHY oscillator.
6. USB Host and OTG power supply for powering PIC32 USB applications.
Figure 2: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Back)
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Microchip Part Number: DM320006 (without Crypto) or DM320006-C (with Crypto)
The top assembly of the board includes these key features, as indicated in Figure 1:
1. PIC32MZ2048ECH144 32-bit microcontroller.
2. Green power indicator LED.
3. On-board crystal or oscillator for precision microcontroller clocking (12 MHz).
4. USB connectivity for on-board debugger communications.
5. Green debug indicator LED.
6. Three push button switches for user-defined inputs.
7. Three user-defined indicator LEDs.
8. USB Type A receptacle connectivity for PIC32 host-based applications.
9. HOST mode power jumper.
10. Daughter board connectors for flexible Ethernet PHY options.
11. 32 kHz oscillator for RTCC and Timer1 (optional).
12. External 2 GB SQI memory for expanded memory application.
13. Jumper for using or disconnecting the on-board debugger.
NOTE: When running self-powered USB device applications, open the jumper JP1 to prevent possibly back-feeding voltage onto
the Vbus from one port on the host to another (or from one host to another).
Figure 1: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Front)
The bottom assembly of the board includes these key features, as indicated in Figure 2:
1. PIC24FJ256GB106 USB microcontroller for on-board debugging.
2. Regulated +3.3V power supply for powering the starter kit via USB or expansion board.
3. Connector for various expansion boards.
4. USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 OTG/device-based applications.
5. 50 MHz Ethernet PHY oscillator.
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6. USB Host and OTG power supply for powering PIC32 USB applications.
Figure 2: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Back)
3.3.5.3 PICtail Plus SSD1926 Daughter Board
This topic provides information about the Graphics LCD Controller PICtail™ Plus SSD1926 Board.
Description
More Information
Microchip Part Number: AC164127-5
Microchip Product Page
3.3.5.4 PICtail Plus S1D13517 Daughter Board
This topic provides information about the Graphics LCD Controller PICtail™ Plus SSD1926 Daughter Board.
Description
More Information
Microchip Part Number: AC164127-7
Microchip Product Page
3.3.5.5 PICtail Plus LCC Daughter Board
This topic provides information about the Graphics LCD Controller PICtail™ Plus LCC Daughter Board.
Description
More Information
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Microchip Part Number: AC164144
Microchip Product Page
3.3.5.6 PIC32MX795F512L Plug-In-Module (PIM)
Provides information on the PIC32MX795F512L Plug-In-Module (PIM).
Description
This PIM is required while using the Explorer 16 Development Board.
More Information
Microchip Part Number: MA320003
microchipDIRECT Product Page
3.3.5.7 Multimedia Expansion Board (MEB)
This topic provides information about the Multimedia Expansion Board (MEB).
3.3.5.8 Multimedia Expansion Board II (MEB II)
Provides details information on the Multimedia Expansion Board II (MEB) II.
Description
Description
Microchip Part Number: DM320005-2
Product Page
The front side of the MEB II includes these key features, as shown in Figure 1:
1. Display daughter board connector (60-pin Hirose board-to-board connector).
2. mTouch™ buttons.
3. Push Button.
4. Power LED.
5. User LEDs.
6. VGA Camera (OVM7690).
7. PICtail™ Connector.
8. Analog temperature sensor.
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Figure 1: Multimedia Expansion Board II Layout (Front)
The underside of the MEB II includes these key features, as shown in Figure 2:
1. Regulated 5V and 3.3V power supply for powering the board via a 9-15V DC Adapter.
2. PIC32 Starter Kit connector (168-pin Hirose board-to-board connector).
3. 24-bit stereo audio codec (AK4953A).
4. Integrated 802.11bg wireless module (MRF24WG0MA).
5. Low-cost Bluetooth® HCI transceiver (BTM805).
6. EBI SRAM memory (IS61WV102416BLL).
7. microSD slot.
8. Analog accelerometer (ADXL325).
Figure 2: Multimedia Expansion Board II Layout (Back)
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3.4 Peripheral Library Example Applications
This topic describes the peripheral library example applications.
3.4.1 Introduction
Peripheral Library Example Applications
for
MPLAB Harmony
The example applications for MPLAB peripheral libraries (PLIBs) provide very simple single-purpose examples of how to use
MPLAB Harmony peripheral libraries.
Description
Peripheral libraries (PLIBs) are the lowest level libraries provided with MPLAB Harmony. They provide a functional abstraction of
the peripherals available on Microchip microcontrollers to hide differences in register details that can exist from part to part.
However, they do not maintain any state data (at least not any that isn't stored in the hardware registers) from call to call and
they do not provide any protection of the peripheral's resources. As such, any code that calls the PLIB for a peripheral must take
responsibility for ownership of that peripheral and is responsible for managing the behavior of that peripheral.
As such, PLIBs are normally only used by MPLAB Harmony device drivers or system services. However, there are some times
when it is necessary and appropriate to interact with a PLIB directly from an application. So, simple examples are provided to
show how to use the interfaces the peripheral libraries. These examples are available in the MPLAB Harmony installation in the
following location.
Location of Example Applications
/apps/examples/peripheral
Examples are divided into two different groups:
• Blocking Examples
• State-Driven Examples
Most MPLAB Harmony applications use a state-machine driven structure. So, examples are provided that follow this structure in
the "state_driven" subdirectory. However, it is sometimes easier to understand a simple blocking example (one that sits in a loop
for ever or until its task is done). So, simple blocking examples are also provided in the "blocking" subdirectory.
Blocking examples are divided into PIC32MX and PIC32MZ variants. PIC32MX examples are written for the Explorer16
Development Board with a PIC32MX795F512L PIM. PIC32MZ examples are written for the PIC32MZ Embedded Connectivity
(EC) Starter Kit. The state-driven examples are tested and working on the Explorer 16 Development Board, the PIC32 USB
Starter Kit II, and the PIC32MZ Embedded Connectivity (EC) Starter Kit, and the appropriate board configuration for each project
can be selected in MPLAB X IDE.
3.4 Peripheral Library Example Applications MPLAB Harmony Help Release Notes
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3.4.2 Release Notes
MPLAB Harmony Version: v0.70b Peripheral Library Example Applications Version: 0.01a Release Date: 18Nov2013
The interface can change in the beta and\or 1.0 release.
New This Release:
Nothing to report for this release.
Known Issues:
Nothing to report for this release.
3.4.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
3.4.4 Blocking Applications
This topic contains a list of the MPLAB Harmony blocking peripheral library (PLIB) example applications.
Description
The tables below list and summarizes the simple blocking peripheral library example applications.
Location
/apps/examples/peripheral/blocking/pic32mx
PIC32MX PLIB-based Applications
3.4 Peripheral Library Example Applications MPLAB Harmony Help Blocking Applications
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Name Subdirectory Description
ADC
Potentiometer
adc/adc_pot Repeatedly reads the Explorer 16 Development Board potentiometer and outputs a
pattern on the LEDs corresponding to the potentiometer's position.
Memory
Partition
bmx/mem_partition Partitions flash memory and ram. Explorer 16 Development Board LEDs are turned
on if the RAM partition sizes are correct and the partitioning completed successfully.
Simple
Comparator
cmp/simple_comparator Toggles the LEDs on the Explorer 16 Development Board, depending on which input
of the comparator is at a higher voltage.
Triangle
Wave
cvref/triangle_wave This example will generate a triangular wave on the CVREF output pin.
LED Pattern dma/led_pattern Blinks LEDs on the Explorer 16 Development Board using a pattern stored in Flash
memory. It uses the DMA controller to transfer data from flash to the I/O port
controlling the LEDs.
Master-Slave i2c/master_slave The I2C1 module is setup to operate as the master, while the I2C2 module operates
as the slave. The master sends a string to the slave, which stores the data into an
array.
Simple
Input-Capture
ic/simple_input_capture When a rising edge is output to the Input Capture 1 pin (RD8), it triggers an interrupt,
which then stores the captured timer value into the 'CaptureTime' variable.
Flash Modify nvm/flash_modify Reads, writes and erases data in the program Flash memory.
PWM
Example
oc/oc_pwm Generates a 40 kHz PWM with a 25% duty cycle on the OC1 output pin.
Oscillator
Configuration
osc/osc_config Demonstrates how to change the system clock source and PLL values during
run-time.
LCD Example pmp/pmp_lcd Writes two lines of text to the LCD screen on the Explorer 16 Development Board.
Blinky Leds ports/blinky_leds Toggles the Explorer 16 Development Board LEDs in an infinite loop.
Change
Notice
ports/cn_interrupt When SW4 (the right most button on Explorer 16 Development Board) is pressed, it
triggers a change notice interrupt, which then toggles the Explorer 16 Development
Board LEDs.
Sleep Mode power/sleep_mode This example demonstrates how to put the device into Sleep mode and then awake
the device using the Watchdog Timer.
Reset
Handler
reset/reset_handler This example does checks on various reset flags, assigning each one to an Explorer
16 Development Board LED. If the flag is set, the LED is turned on and the reset flag
is cleared.
RTCC Alarm rtcc/rtcc_alarm Sets up the RTCC module to function as an alarm, which goes off at 6:00am every
morning.
SPI
Loopback
spi/spi_loopback This example assumes that the SPI SDO (output) is connected to the SDI (input).
Data is then transferred directly from the output to the input and the Explorer 16
Development Board LEDs are turned on if the data transfer is successful.
Timer
Example
tmr/timer2_interrupt Uses Timer2 in 32-bit mode to generate an interrupt every one second, blinking the
LEDs on the Explorer 16 Development Board.
Simple UART uart/simple_uart When the Explorer 16 Development Board is connected to a PC with an RS-232
cable, the device will echo what characters the user types into a terminal program
(e.g., Putty) and write the corresponding 8-bit character pattern to the Explorer 16
Development Board LEDs.
Simple WDT wdt/simple_wdt Demonstrates how to setup the Watchdog Timer and detect whether or not a
time-out reset has occurred.
Location
/apps/examples/peripheral/blocking/pic32mz
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PIC32MZ PLIB-based Applications
Name Subdirectory Description
Triangle
Wave
cvref/triangle_wave This example will generate a triangular wave on the CVref output pin.
LED Pattern dma/led_pattern Blinks LEDs on the PIC32MZ Starter-Kit using a pattern stored in flash memory. It
uses the DMA controller to transfer data from flash to the I/O port controlling the
LEDs.
Master-Slave i2c/master_slave The I2C1 module is setup to operate as the master, while the I2C2 module operates
as the slave. The master sends a string to the slave, which stores the data into an
array.
Flash Modify nvm/flash_modify Reads, writes and erases data in the program flash memory.
PWM
Example
oc/oc_pwm Generates a 40KHz PWM with a 25% duty cycle on the OC1 output pin.
Oscillator
Configuration
osc/osc_config Demonstrates how to change the system clock source and PLL values during
run-time.
Blinky Leds ports/blinky_leds Toggles the PIC32MZ Starter-Kit LEDs in an infinite loop.
Change
Notice
ports/cn_interrupt When SW1 is pressed, it triggers a change notice interrupt, which then toggles the
PIC32MZ Starter-Kit LEDs.
Sleep Mode power/sleep_mode This example demonstrates how to put the device into sleep mode and then awake
the device using the watchdog timer.
Reset
Handler
reset/reset_handler This example does checks on various reset flags, assigning each one to an LED. If
the flag is set, the LED is turned on and the reset flag is cleared.
RTCC Alarm rtcc/rtcc_alarm Sets up the RTCC module to function as an alarm, which goes off at 6:00am every
morning.
SPI
Loopback
spi/spi_loopback This example assumes that the SPI SDO (output) is connected to the SDI (input).
Data is then transferred directly from the output to the input and the LEDs are turned
on if the data transfer is successful.
Timer
Example
tmr/timer2_interrupt Uses Timer 2 in 32-bit mode to generate an interrupt every one second, blinking the
LEDs on the PIC32MZ Starter-Kit.
Simple
UART
uart/simple_uart When the PIC32MZ Starter-Kit is connected to a PC with an RS-232 cable, the
device will echo what characters the user types into a terminal program (e.g. Putty).
Simple WDT wdt/simple_wdt Demonstrates how to setup the watchdog timer and detect whether or not a timeout
reset has occurred.
3.4.5 State-Driven Applications
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
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3.5 NVM Driver Demonstration
3.5.1 Introduction
This help file contains instructions and associated information about MPLAB Harmony NVM driver application demonstrations,
which are contained in the MPLAB Harmony Library distribution.
Description
This application demonstrates the capabilities of the MPLAB Harmony NVM driver. This help file describes the hardware
requirement and procedures to build, run the demo project on Microchip development tools. In this demo application, NVM driver
is used to access the internal flash memory of PIC32 MX and PIC32 MZ Devices to perform Write and Read operations and
indicates the result by LED display.
To know more about MPLAB Harmony NVM driver, configuring the NVM driver and API's provided by the NVM driver, refer to
MPLAB Harmony NVM Driver Library documentation.
3.5.2 Release Notes
MPLAB Harmony Version: v0.70b NVM Driver Demonstration Version: 0.01a Release Date: 18Nov2013
New This release:
This is the first release of this NVM Driver demonstration application. This demonstration has been developed to support
PIC32MX and PIC32MZ devices.
Known Issues:
• This Demo application is tested only up to 150 bytes in interrupt mode in PIC32MZ devices
• Changes in NVM driver interfaces will have impact on this demo application as well in subsequent releases
3.5.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
3.5 NVM Driver Demonstration MPLAB Harmony Help SW License Agreement
3-102
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
3.5.4 Hardware
This section describes how to select and use an appropriate development board and steps to configure the hardware to run this
NVM driver demo.
3.5.4.1 Required Hardware
This section describes the overview of required hardware family and supported demonstration boards for running this NVM driver
demo application.
Description
To run this demonstration project. you will require one of the following sets of hardware.
3.5.4.1.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Following board is supported for PIC32MX devices: -
Demo Board (click link for board information) Notes
PIC32 USB Starter Kit II -
Explorer 16 Development Board -
PIC32MX795F512L Plug-in Module (PIM) -
Following board is supported for PIC32MZ devices: -
Demo Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.5.4.1.2 Hardware Information
Information on hardware used by the NVM driver demo application.
Description
The NVM driver demo application can be tried on different hardware boards. This section provide details on the different
hardware boards that this demo application supports.
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3.5.4.1.2.1 PIC32 USB Starter Kit II
Provides information on the PIC32 USB Starter Kit II.
Description
SW1 - Application switch. Tied to RD6.
SW2 - Application switch. Tied to RD7.
SW3 - Application switch. Tied to RD13.
LED1 - Application LED. Tied to RD0.
LED2 - Application LED. Tied to RD1.
LED3 - Application LED. Tied to RD2.
More Information
Microchip Part Number : DM320003-2
3.5.4.1.2.2 Explorer 16 Development Board
Provides information on the Explorer 16 Development Board.
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Description
S1 - Reset button (MCLR)
S2 - Processor switch. This switch determines which processor is running, the processor on the board or the processor on the
Plug-In-Module (PIM).
S3, S4, S5, S6 - Application switches. For information about what pin is connected to this switch, please refer to the information
for the PIM in use.
D3 through D10 - Application LEDs. For information about what pin is connected to this LED, please refer to the information for
the PIM in use.
More Information:
Microchip Part Number: DM240001
3.5.4.1.2.3 PIC32MX795F512L Plug-in Module (PIM)
Provides information on the PIC32MX795F512L Plug-In-Module (PIM).
Description
This PIM is required while using the Explorer 16 Development Board.
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More Information
Microchip Part Number: MA320003
microchipDIRECT Product Page
3.5.4.1.2.4 PIC32MZ Embedded Connectivity (EC) Starter Kit
Provides information on the PIC32MZ Embedded Connectivity (EC) Starter Kit.
Description
Microchip Part Number: DM320006 (without Crypto) or DM320006-C (with Crypto)
The top assembly of the board includes these key features, as indicated in Figure 1:
1. PIC32MZ2048ECH144 32-bit microcontroller.
2. Green power indicator LED.
3. On-board crystal or oscillator for precision microcontroller clocking (12 MHz).
4. USB connectivity for on-board debugger communications.
5. Green debug indicator LED.
6. Three push button switches for user-defined inputs.
7. Three user-defined indicator LEDs.
8. USB Type A receptacle connectivity for PIC32 host-based applications.
9. HOST mode power jumper.
10. Daughter board connectors for flexible Ethernet PHY options.
11. 32 kHz oscillator for RTCC and Timer1 (optional).
12. External 2 GB SQI memory for expanded memory application.
13. Jumper for using or disconnecting the on-board debugger.
NOTE: When running self-powered USB device applications, open the jumper JP1 to prevent possibly back-feeding voltage onto
the Vbus from one port on the host to another (or from one host to another).
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Figure 1: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Front)
The bottom assembly of the board includes these key features, as indicated in Figure 2:
1. PIC24FJ256GB106 USB microcontroller for on-board debugging.
2. Regulated +3.3V power supply for powering the starter kit via USB or expansion board.
3. Connector for various expansion boards.
4. USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 OTG/device-based applications.
5. 50 MHz Ethernet PHY oscillator.
6. USB Host and OTG power supply for powering PIC32 USB applications.
Figure 2: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Back)
3.5.4.1.2.5 Multimedia Expansion Board II (MEB II)
Provides information on the Multimedia Expansion Board II (MEB II).
Description
Microchip Part Number: DM320005-2
Product Page
The front side of the MEB II includes these key features, as shown in Figure 1:
1. Display daughter board connector (60-pin Hirose board-to-board connector).
2. mTouch™ buttons.
3. Push Button.
4. Power LED.
5. User LEDs.
6. VGA Camera (OVM7690).
7. PICtail™ Connector.
8. Analog temperature sensor.
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Figure 1: Multimedia Expansion Board II Layout (Front)
The underside of the MEB II includes these key features, as shown in Figure 2:
1. Regulated 5V and 3.3V power supply for powering the board via a 9-15V DC Adapter.
2. PIC32 Starter Kit connector (168-pin Hirose board-to-board connector).
3. 24-bit stereo audio codec (AK4953A).
4. Integrated 802.11bg wireless module (MRF24WG0MA).
5. Low-cost Bluetooth® HCI transceiver (BTM805).
6. EBI SRAM memory (IS61WV102416BLL).
7. microSD slot.
8. Analog accelerometer (ADXL325).
Figure 2: Multimedia Expansion Board II Layout (Back)
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3.5.4.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
Explorer 16 Development Board
This demonstration application is demonstrated using Explorer 16 Development Board, PIC32 USB Starter Kit II and PIC32MZ
Embedded Connectivity (EC) Starter Kit. The following hardware configuration should be set up before running this application.
1. Before attaching the PIC32MX795F512L PIM to the Explorer 16 Development Board, ensure that the processor select switch
(S2) is in the PIM Position.
2. Short JP2 on the Explorer 16 Development Board to enable the LEDs.
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.5.5 Building the Application
This section describes how to build this demonstration project.
Description
Once the hardware is configured, you are ready to build this application.
Project Setup :
From the MPLAB X IDE, Select "open project" and browse to this demo location. This demo application is available in "/apps/driver/nvm/nvm_read_write/firmware/nvm_read_write.X". This directory contains all the application related source
files, header files as well as MPLAB X IDE project related workspace files.
How to build this demonstration application:
To build this demo in debug mode, Go to "Run" menu in MPLAB X IDE and select "Build Main Project" or select "Build Main
Project" in toolbar. Once the project gets compiled successfully, you can run this demonstration application.
For more information on how to compile and program projects, refer to the MPLAB X IDE help available through the help menu
in MPLAB X IDE.
Note:The appropriate project configurations should be selected before building the project for the configured hardware.
3.5.5.1 Configuring the Application
This section describes the list of configuration options, build options, and how they are configured for this demonstration
application.
Build options:
This application supports both PIC32MX and PIC32MZ devices. From project properties of MPLAB X IDE, select
"pic32mx_usb_starterkit_II" configuration if the target hardware is a PIC32MX device, or select "pic32mz_sk" configuration if the
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target hardware is a PIC32MZ device.
The default target device is "PIC32MX795F512L" for "pic32mx_usb_starterkit_II" configuration and "PIC32MZ2048ECH144" for
"pic32mz_sk" configuration with optimization level as "0". The various optimization levels can be selected from the list to run this
demonstration.
Note: If the target device is changed, the appropriate PIM needs to be used to run this demonstration application.
Configuration options:
All of the demonstration application related configuration options are available in "system_config.h" file. This file is available in
the "apps/driver/nvm/nvm_read_write/firmware/src/system_config/pic32mx_usb_starterkit_II" or "apps/driver/nvm/nvm_read_write/firmware/src/system_config/pic32mz_sk"directory based on the configuration selected.
This file has the following list of configurations:
• General System Clock Services
• NVM Driver
• Interrupt services
Note: Based on the configurations, the demo application behavior will be changed.
3.5.5.2 Configuring the Libraries
This section describes the configuration options provided by MPLAB Harmony Libraries used by the application.
Macro Name Description
#define
DRV_NVM_INSTANCES_NUMBER
This definition selects the maximum number of hardware instances that can be supported
by the dynamic NVM driver
#define
DRV_NVM_CLIENTS_NUMBER
This definition selects the maximum number of clients that the NVM driver can support at
run time
#define
DRV_NVM_INTERRUPT_MODE
This macro controls the operation of the driver in the interrupt mode of operation
#define DRV_NVM_ROW_SIZE This macro defines the row size of target Flash
#define DRV_NVM_PAGE_SIZE This macro selects the NVM page size size
#define NVM_BASE_ADDRESS This macro defines the address to which the data is written and read
3.5.5.3 Customizing the Application
This section explains the steps involved in customizing the existing demonstration application.
Customizing Existing Demonstration Application:
In this demo application, the NVM driver operates in interrupt mode. Following are the steps to be used to customize this
application in olling mode.
1. Change #define DRV_NVM_INTERRUPT_MODE as false in "system_config.h" file
2. Remove the NVM ISR routine from "system_int.c" file
3. Call the DRV_NVM_Tasks function in "system_task.c" file
After changing the above configurations, compile the customized application and program the target device.
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3.5.6 Running the Application
This section demonstrates how to run the NVM Driver demonstration.
Description
This is a simple demonstration to show how to configure and make use of NVM driver API's to implement and access on-board
Flash memory of PIC32MX and PIC32MZ devices.
How to run this demonstration application:
Once the demonstration application is compiled successfully, you are ready to program the firmware in the target device.
To run the demonstration in debug mode, below are the steps to be followed.
1. Select appropriate configuration from project properties based on the target hardware.
2. Select your device programmer from the "hardware tool" in MPLAB X IDE.
3. Select the "Debug Main Project" in "Debug" menu or select the "Debug Main Project" in toolbar.
Build the selected configuration in the MPLAB X IDE project and program the demonstration board. The execution status
(pass/fail) of the demonstration is indicated by LEDs on the demonstration board.
Demonstration Board Successful Indication Failure Indication
PIC32 USB Starter Kit II LED2 LED1
PIC32MZ Embedded Connectivity (EC) Starter Kit Green LED Red LED
This demonstration first reads the data from specific NVM address define in system_config.h header file and erases the entire
sector, write 150 bytes of data and reads back. The Pass/Fail criteria is indicated using LEDs as defined above.
3.5.7 Files
This section provides a complete list of source files required by the application and describes the purpose of adding each files.
MPLAB Harmony installation follows a standard directory structure for all application solutions. In this directory structure, the
driver, plib, system services related source files, header files for this demonstration application are available in "/framework/". Below are the list of files added in this demonstration application.
Files Description
driver.h Driver Library Interface Header
drv_common.h This file defines all common macros and definitions used by the driver
drv_nvm.h NVM device driver interface file.
system.h System Service Interface Headers
sys_common.h This file contains system Common definitions and declarations
sys_module.h This file contains system module definitions
system_config.h This is file contains all the system configurations
system_definitions.h This contains system prototypes and definitions
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app.h This file contains application related definitions and prototypes
config_performance.c BSP file for Explorer 16 Development Board
drv_nvm_dynamic.c This file contains NVM device driver dynamic implementation
plib_int_pic32.c Interrupt Source implementation for PIC32 devices
sys_int_pic32.c This file contains functions related to the Interrupt System Service for PIC32 devices
app.c This file contains application related implementations
main.c This file contains application's main entry point
system_init.c This file contains source code necessary to initialize the system
system_int.c This file contains a definitions of the raw ISRs required to support the interrupt sub-system
system_tasks.c This file will contain any source code necessary to maintain various tasks in the system
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3.6 RTOS Demonstrations
3.6.1 Introduction
RTOS Demonstration Applications Help
Description
This distribution package contains a variety of RTOS based firmware projects that demonstrate the capabilities of the MPLAB
Harmony services and stacks integrated with RTOS running on PIC32 devices. This help file describes the hardware
requirement and procedures to run these firmware projects on Microchip demonstration and development boards.
To learn more about MPLAB Harmony stacks and libraries refer to the related Framework help documentation.
3.6.2 Release Notes
MPLAB Harmony Version: v0.70b RTOS Demonstrations Version: 0.01a Release Date: 18Nov2013
New This Release:
This release contains the FreeRTOS basic project.
Known Issues:
Nothing to report for this release.
3.6.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
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MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
3.6.4 Demonstrations
This topic provides information on how to run the RTOS demonstration applications included in this release.
Description
All demonstrations provided should be built using the MPLAB X IDE development environment tool supplied by Microchip.
The following information communicates the general steps to building the demonstrations.
• Using MPLAB X IDE, click the File drop-down, select "Open Project...". Navigate to your Harmony installation folder. The
default location on Windows will be: C:\Microchip\Harmony\\apps\rtos
• In the \app\rtos folder there will be the demonstration applications.
• Within each demonstration folder, there will be a MPLAB X IDE project specific to each demonstration
• Select the project and click "Open Project"
• To configure the project specific to a preset board configuration, right click on the project and select "Set Configuration"
This will set the build configuration to match the supported board configuration.
3.6.4.1 FreeRTOS_basic_demo
3.6.4.1.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.6.4.1.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
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3.6.4.1.3 Running the Demonstration
Provides instructions on how to build and run the FreeRTOS basic demonstration.
Description
Please use the following procedure to run the demonstration:
1. Load demonstration project into MPLAB X IDE.
2. Connect the mini-B debugger port on-board the PIC32MX or PIC32MZ Starter board to an USB port on the development
computer using the USB cable provided in the kit.
3. Build, Download, and Run demonstration project on the target board.
The demonstration application features the following:
• Application creates one queue and four tasks. One task that sends the data using FreeRTOS queue to the two tasks that
waits for the data in the queue. (QueueReceiveTask2 priority is higher than the QueueReceiveTask1 priority.)
• QueueReceiveTask2 receives the data first, toggles the LED, and then sleeps for the specified time
• QueueReceiveTask1 receives the next data since QueueReceiveTask2 is not in running state
• QueueReceiveTask1 receives the data, toggles the LED and waits for the data arrival
3.6.4.2 uC_OS_III_basic_demo
3.6.4.2.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.6.4.2.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.6.4.2.3 Running the Demonstration
Provides instructions on how to build and run the uC_OS_III basic demonstration.
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Description
Demonstration applications are available in the following folders:
• \app\rtos\freeRTOS\gfx
• \app\rtos\uC_OS_III\gfx
• \app\rtos\freeRTOS\basic
• \app\rtos\uC_OS_III\basic
Within each demonstration folder, there will be a MPLAB X IDE project specific to each demonstration
Select the project and click "Open Project"
These demos will show the following:
• <\gfx> The selected RTOS integrated in with the Harmony compliant Graphics stack.
• <\basic> The basic blink LED demo showing the selected RTOS running with the hardware.
Once the demo is up running an LED will toggle every 500ms. This demo will show the RTOS running with the selected
hardware.
3.6.4.3 FreeRTOS RTOS with Graphics
3.6.4.3.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.6.4.3.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.6.4.3.3 Running the Demonstration
Provides instructions on how to build and run the FreeRTOS RTOS with Graphics demonstration.
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Description
Demonstration applications are available in the following folders:
• \app\rtos\freeRTOS\gfx
• \app\rtos\uC_OS_III\gfx
• \app\rtos\freeRTOS\basic
• \app\rtos\uC_OS_III\basic
Within each demonstration folder, there will be a MPLAB X IDE project specific to each demonstration
Select the project and click "Open Project"
These demos will show the following:
• <\gfx> The selected RTOS integrated in with the Harmony compliant Graphics stack.
• <\basic> The basic blink LED demo showing the selected RTOS running with the hardware.
Once the demo is up running the screen color on the graphics display will change once every 500ms. A LED will toggle every
500ms.
The projects have been setup to use relative paths from the project folder and must remain under the apps\rtos\ root folders in
order to build correctly.
3.6.4.4 Micrium uC_OS_III with Graphics
3.6.4.4.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.6.4.4.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
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3.6.4.4.3 Running the Demonstration
Provides instructions on how to build and run the Micrium uC_OS_III with Graphics demonstration.
Description
Demonstration applications are available in the following folders:
• \app\rtos\freeRTOS\gfx
• \app\rtos\uC_OS_III\gfx
• \app\rtos\freeRTOS\basic
• \app\rtos\uC_OS_III\basic
Within each demonstration folder, there will be a MPLAB X IDE project specific to each demonstration
Select the project and click "Open Project"
These demos will show the following:
• <\gfx> The selected RTOS integrated in with the Harmony compliant Graphics stack.
• <\basic> The basic blink LED demo showing the selected RTOS running with the hardware.
Once the demo is up running the screen color on the graphics display will change once every 500ms. A LED will toggle every
500ms.
The projects have been setup to use relative paths from the project folder and must remain under the apps\rtos\ root folders in
order to build correctly.
Under the uC_OS_III\ folder, an extra step must be taken to build the project successfully. The RTOS source code and
appropriate port for the selected hardware must be download from Micrium and installed into the follow folder,
\third_party\rtos\.
3.6.5 Demonstration Board Information
3.6.5.1 PIC32 USB Starter Kit II
Provides information on the PIC32 USB Starter II.
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Description
SW1 - Application switch. Tied to RD6.
SW2 - Application switch. Tied to RD7.
SW3 - Application switch. Tied to RD13.
LED1 - Application LED. Tied to RD0.
LED2 - Application LED. Tied to RD1.
LED3 - Application LED. Tied to RD2.
More Information
Microchip Part Number : DM320003-2
3.6.5.2 PIC32MZ Embedded Connectivity (EC) Starter Kit
Provides details information on the PIC32MZ Embedded Connectivity (EC) Starter Kit.
Description
Microchip Part Number: DM320006 (without Crypto) or DM320006-C (with Crypto)
The top assembly of the board includes these key features, as indicated in Figure 1:
1. PIC32MZ2048ECH144 32-bit microcontroller.
2. Green power indicator LED.
3. On-board crystal or oscillator for precision microcontroller clocking (12 MHz).
4. USB connectivity for on-board debugger communications.
5. Green debug indicator LED.
6. Three push button switches for user-defined inputs.
7. Three user-defined indicator LEDs.
8. USB Type A receptacle connectivity for PIC32 host-based applications.
9. HOST mode power jumper.
10. Daughter board connectors for flexible Ethernet PHY options.
11. 32 kHz oscillator for RTCC and Timer1 (optional).
12. External 2 GB SQI memory for expanded memory application.
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13. Jumper for using or disconnecting the on-board debugger.
NOTE: When running self-powered USB device applications, open the jumper JP1 to prevent possibly back-feeding voltage onto
the Vbus from one port on the host to another (or from one host to another).
Figure 1: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Front)
The bottom assembly of the board includes these key features, as indicated in Figure 2:
1. PIC24FJ256GB106 USB microcontroller for on-board debugging.
2. Regulated +3.3V power supply for powering the starter kit via USB or expansion board.
3. Connector for various expansion boards.
4. USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 OTG/device-based applications.
5. 50 MHz Ethernet PHY oscillator.
6. USB Host and OTG power supply for powering PIC32 USB applications.
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Figure 2: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Back)
Microchip Part Number: DM320006 (without Crypto) or DM320006-C (with Crypto)
The top assembly of the board includes these key features, as indicated in Figure 1:
1. PIC32MZ2048ECH144 32-bit microcontroller.
2. Green power indicator LED.
3. On-board crystal or oscillator for precision microcontroller clocking (12 MHz).
4. USB connectivity for on-board debugger communications.
5. Green debug indicator LED.
6. Three push button switches for user-defined inputs.
7. Three user-defined indicator LEDs.
8. USB Type A receptacle connectivity for PIC32 host-based applications.
9. HOST mode power jumper.
10. Daughter board connectors for flexible Ethernet PHY options.
11. 32 kHz oscillator for RTCC and Timer1 (optional).
12. External 2 GB SQI memory for expanded memory application.
13. Jumper for using or disconnecting the on-board debugger.
NOTE: When running self-powered USB device applications, open the jumper JP1 to prevent possibly back-feeding voltage onto
the Vbus from one port on the host to another (or from one host to another).
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Figure 1: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Front)
The bottom assembly of the board includes these key features, as indicated in Figure 2:
1. PIC24FJ256GB106 USB microcontroller for on-board debugging.
2. Regulated +3.3V power supply for powering the starter kit via USB or expansion board.
3. Connector for various expansion boards.
4. USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 OTG/device-based applications.
5. 50 MHz Ethernet PHY oscillator.
6. USB Host and OTG power supply for powering PIC32 USB applications.
Figure 2: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Back)
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3.7 SPI Driver Demonstrations
3.7.1 Introduction
This help file contains instructions and associated information about MPLAB Harmony SPI driver application demonstrations,
which are contained in the MPLAB Harmony Library distribution.
Description
This application demonstrates the capabilities of the MPLAB Harmony SPI driver. This help file describes the hardware
requirement and procedures to build, run the demo project on Microchip development tools. In this demo application, SPI driver
is used to access the external EEPROM in the Explorer 16 Development Board to perform Write and Read operations and
indicates the result by LED display.
To know more about MPLAB Harmony SPI driver, configuring the SPI driver and API's provided by the SPI driver, refer to the
SPI Driver Library documentation.
3.7.2 Release Notes
MPLAB Harmony Version: v0.70b SPI Driver Demonstrations Version: 0.01a Release Date: 18Nov2013
New This release:
This is the first release of this SPI driver demonstration application. This demo has been developed to support PIC32MX devices
only. The following demonstration shows the usage of the SPI driver:
• serial_eeprom
Limitations and Known Issues:
• Demo application is only developed and tested in Interrupt mode
• Changes in SPI driver interfaces will have impact on this demo application as well in subsequent releases
• This demo will support to run only on Explorer 16 Development Board
3.7.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
3.7.4 Hardware
This section describes how to select and use an appropriate development board and steps to configure the hardware to run this
SPI driver demo.
3.7.4.1 Required Hardware
This section describes the overview of required hardware family and supported demonstration boards for running this SPI driver
demo application.
Description
To run this demonstration project. you will require one of the following sets of hardware.
3.7.4.1.1 Supported Demonstration Boards
The following demo boards are supported in this release.
Description
Demonstration Board Notes
Explorer 16 Development board -
3.7.4.1.2 Hardware Information
Information on hardware used by the SPI driver demo application.
Description
The SPI driver demo application can be tried across on hardware boards. This section provide details on the different hardware
boards that are used by the demo application.
3.7.4.1.2.1 Explorer 16 Development Board
Provides information on the Explorer 16 Development Board .
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Description
S1 - Reset button (MCLR)
S2 - Processor switch. This switch determines which processor is running, the processor on the board or the processor on the
Plug-In-Module (PIM).
S3, S4, S5, S6 - Application switches. For information about what pin is connected to this switch, please refer to the information
for the PIM in use.
D3 through D10 - Application LEDs. For information about what pin is connected to this LED, please refer to the information for
the PIM in use.
More Information:
Microchip Part Number: DM240001
3.7.4.1.2.2 PIC32MX795F512L Plug-in Module (PIM)
Provides information on the PIC32MX795F512L Plug-In-Module (PIM).
Description
This PIM is required while using the Explorer 16 Development Board.
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More Information
Microchip Part Number: MA320003
Information Sheet
3.7.4.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
serial_eeprom demo
This application is demonstrated using Explorer 16 Development Board. the following hardware configuration should be done
before running this application.
1. Before attaching the PIC32MX795F512L PIM to the Explorer 16 Development Board, ensure that the processor select switch
(S2) is in the PIM Position.
2. Short JP2 on the Explorer 16 Development Board to enable the LEDs.
Complete the previously described hardware configuration setup to to run this demo.
3.7.5 Building the Application
This section describes how to build this demo project.
Description
Once the hardware is configured, you are ready to build this application.
Project Setup :
From MPLAB X IDE, Select "open project" and browse to this demo location. This demo application is available in "/apps/driver/spi/serial_eeprom.X". This directory contains all the application related source files, header files as well as
MPLAB X IDE project related workspace files.
How to build this demo application:
To build this demo in debug mode, Go to "Run" menu in MPLAB X IDE and select "Build Main Project" or select "Build Main
Project" in toolbar. Once the project gets compiled successfully, you can run this demo application.
For more information on how to compile and program projects, refer to the MPLAB X IDE help available through the help menu
in MPLAB X IDE.
Note: The appropriate project configurations should be selected before building the project for the configured hardware.
3.7.5.1 Customizing the Application
This section explains the steps involved in customizing the existing demo application.
Customizing Existing Demo Application:
In this demo application, the SPI driver is operates in interrupt mode. Below are the steps to be followed to customize this
application in polling mode.
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1. Change #define DRV_SPI_INTERRUPT_MODE as false in "system_config.h" file
2. Remove the SPI interrupt source Priority and sub priority set functions calls from "system_init.c" file
3. Remove the SPI ISR routine from "system_int.c" file
4. Call the DRV_SPI_Tasks function in "system_task.c" file
After changing the above configurations, compile the customized application and program the target device.
3.7.5.2 Configuring the Libraries
This section describes the configuration options provided by MPLAB Harmony Libraries used by the application.
#define DRV_SPI_INSTANCES_NUMBER This definition selects the maximum number of hardware instances that can
be supported by the dynamic SPI driver
#define DRV_SPI_CLIENTS_NUMBER This definition selects the maximum number of clients that the SPI driver can
support at run time
#define DRV_SPI_INTERRUPT_MODE This macro controls the operation of the driver in the interrupt mode of
operation
#define DRV_SPI_PORTS_REMAP_USAGE This macro selects the SPI pins remap
#define DRV_SPI_BUFFER_SIZE This macro selects the SPI buffer size
#define
DRV_SPI_FRAME_SYNC_PULSE_DIRECTION
This macro selects the SPI frame sync pulse direction
#define
DRV_SPI_FRAME_SYNC_PULSE_POLARITY
This macro selects the SPI frame sync pulse polarity
#define
DRV_SPI_FRAME_SYNC_PULSE_EDGE
This macro selects the SPI frame sync pulse edge
3.7.5.3 Configuring the Application
This section describes the list of configuration options , build options and how they are configured for this demo application.
Build options:
This application supports only to demonstrate the SPI driver in master mode. This option "spi_master_explorer16" can be
selected from the project properties in MPLAB X IDE or from the configuration drop down in toolbar.
The default target device is selected as "PIC32MX795F512L" with optimization level as "0". The various optimization levels can
be selected from the list to run this demo.
Note: If the target device is changed, then appropriate PIM needs to be used to run this demo application
Configuration options:
All the demo application related configuration options are available in "system_config.h" file. This file is available in the "/apps/driver/spi/src/system_config/" directory based on the configured hardware. This file has the followingconfigurations,
• General System Clock Services
• SPI Driver
Note: Based on the configurations, the demo application behavior will be changed.
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3.7.6 Running the Application
This section demonstrates how to run the SPI driver demo.
Description
This is a simple demo to show how to configure and make use of SPI driver API's to implement and access on board EEPROM
chip in the Explorer 16 Development Board.
How to run this demo application
Once the demo application is compiled successfully, you are ready to program the firmware in the target device.
To run the demo in debug mode, below are the steps to be followed.
1. Select your device programmer from the "hardware tool" in MPLAB X IDE.
2. Select the "Debug Main Project" in "Debug" menu or select the "Debug Main Project" in toolbar.
Once the device is successfully programmed, you can observe LED in the Explorer 16 Development Board will be turned ON.
This shows the demo project has ran successfully and based on the LED "D4" or "D3" the demo application indicates the
PASS/FAIL.
Notes:
If LED "D3" is turned ON, it indicates the EEPROM W/R functionality has failed.
If LED "D4" is turned ON, it indicates the EEPROM W/R functionality has passed.
3.7.7 Files
This section provides a complete list of source files required by the application and describes the purpose of adding each files.
MPLAB Harmony installation follows a standard directory structure for all application solutions. In this directory structure, the
driver, plib, system services related source files, header files for this demo application are available in "/framework/". Below are the list of files added in this demo application.
Files Description
driver.h Driver Library Interface Header
drv_common.h This file defines all common macros and definitions used by the driver
drv_spi.h SPI device driver interface file.
system.h System Service Interface Headers
sys_common.h This file contains system Common definitions and declarations
sys_module.h This file contains system module definitions
system_config.h This is file contains all the system configurations
system_definitions.h This contains system prototypes and definitions
app.h This file contains application related definitions and prototypes
config_performance.c BSP file for Explorer 16 Development Board
drv_spi_dynamic.c This file contains SPI device driver dynamic implementation
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plib_int_pic32.c Interrupt Source implementation for PIC32 devices
sys_clk.c This file contains clock system service implementation
sys_clk_pic32.c This file contains clock system service implementation specific to PIC32 devices
sys_queue.c This file contains system queue services
sys_int_pic32.c This file contains functions related to the Interrupt System Service for PIC32 devices
sys_ports.c This file contains Ports System Service interface implementation.
app.c This file contains application related implementations
main.c This file contains application's main entry point
system_init.c This file contains source code necessary to initialize the system
system_int.c This file contains a definitions of the raw ISRs required to support the interrupt sub-system
system_tasks.c This file will contain any source code necessary to maintain various tasks in the system
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3.8 TCP/IP Demonstrations
3.8.1 Introduction
TCP/IP Web Server Demonstration Applications Help
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
3.8.2 Release Notes
MPLAB Harmony Version: v0.70b TCP/IP Demonstrations Version: 0.01a Release Date: 18Nov2013
The interface can change in the beta and\or 1.0 release.
New This Release:
Nothing to report for this release.
Known Issues:
Nothing to report for this release.
3.8.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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3.8.4 Demonstrations
Description of TCP/IP Stack Library Demonstration Application
Description
This section describes Microchip's TCP/IP Demonstration projects, including information about demonstration-hardware
compatibility and also provides the information about how to configure and run the demonstration.
3.8.4.1 web_server
3.8.4.1.1 pic32_ethernet_starter_kit
This section describes the steps necessary to begin using Microchip's TCP/IP Web server Demonstration Application.
Description
This section describes Microchip's TCP/IP Web Server Demonstration project, including information about
demonstration-hardware compatibility and also provides the information about how to configure and run the demonstration.
3.8.4.1.1.1 Supported Hardware
Lists supported demonstration and development hardware boards.
Description
Demo Board (click link for board information) Notes
PIC32 Ethernet Starter Kit --
PIC32MZ Embedded Connectivity (EC) Starter Kit --
3.8.4.1.1.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
No hardware related configuration or jumper setting changes are necessary.
3.8.4.1.1.3 Running the Demonstration
Provides instructions on how to build and run the TCP/IP Web Server demonstration.
Description
This demonstration hosts a HTTP server when connected to a network. To view the web page hosted by the demonstration
application open a web browser, type http://mchpboard in the address bar and press the enter key.
Please use the following procedure to run the demonstration:
1. Load demonstration project into MPLAB X IDE.
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2. Connect the mini-B debugger port on-board the PIC32MZ Embedded Connectivity (EC) Starter Kit or PIC32MZ Ethernet
Starter Kit board to an USB port on the development computer using the USB cable provided in the kit.
3. Connect the RJ-45 Ethernet port on the PIC32MZ Embedded Connectivity (EC) Starter Kit or PIC32MZ Ethernet Starter Kit
board to a network hub or an Ethernet port on the development computer using the Ethernet patch cord provided in the kit.
4. Build, Download, and Run demonstration project on the target board.
5. A HTTP server is hosted by the demonstration application. Open a web browser, type http://mchpboard in the address bar and
press the enter key.
The demonstration application features following:
a) Real-time hardware control and Dynamic Variables - On the Overview page the the LEDs can be clicked to toggle LEDs on
the Ethernet Starter Board. The buttons on Ethernet Starter Board can be pressed to see the Buttons on the webpage toggle.
The dynamic variables can be updated in real time on the HTTP server.
b) Form Processing - Input can be handled from the client by using GET and POST methods.
c) Authentication - Shows an example to restricted access feature commonly used.
d) File Uploads - Shows an example of file upload using POST method. The HTTP server can accept a user defined
MPFS/MPFS2 image file for webpages.
e) Board Configuration - MAC address, host name and IP address of the PIC32 Ethernet starter board can be viewed in the
Network Configuration page and some configuration can be updated.
Note: LED functionality part of the demonstration is not implemented for PIC32MZ devices.
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3.8.4.1.2 web_server_sdcard_fatfs
This section describes the steps necessary to begin using Microchip's TCP/IP Web server Demonstration Application.
Description
The TCP/IP SDCARD FATFS web server demo (‘apps/tcpip/web_server_sdcard_fatfs/firmware/pic32_ethernet_starter_kit.X’)
exercises the HTTP web server running on PIC32 devices. SDCARD (Secure Digital Card) FATFS (File Allocation Table File
System) web server demo has the web pages stored in external SD CARD and accessed through FATFS API. This demo
currently only works with PIC32MZ using the Multimedia Expansion Board II (MEB II) Setup. PIC32MZ Testing and Fixes in
progress.
3.8.4.1.2.1 Supported Hardware
Lists supported demonstration and development hardware boards.
Description
Demo Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit --
Multimedia Expansion Board II (MEB II) --
3.8.4.1.2.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
• Plug the PIC32MZ Embedded Connectivity (EC) Starter Kit into application board connector on the MEB II
• Make sure a microSD card is formatted and loaded with the web pages provided under
‘apps/tcpip/web_server_sdcard_fatfs/firmware/src/web_pages2_sdcard’ directory
• Insert the microSD card with the web pages into the microSD card slot (J8) on the MEB II
3.8.4.1.2.3 Running the Demonstration
This section provides instructions on how to build and run the TCP/IP SD CARD FS Web Server demonstration.
Description
To view the web page hosted by the demonstration application open a web browser, type http://mchpboard_e in the address bar
and press the Enter key.
Please use the following procedure to run the demonstration:
1. Load demonstration project into MPLAB X IDE.
2. Connect the mini-B debugger port on-board the PIC32MZ Embedded Connectivity (EC) Starter Kit or PIC32MZ Ethernet
Starter Kit to a USB port on the Development computer using the USB cable provided in the kit.
3. Connect the RJ-45 Ethernet port on the PIC32MZ Embedded Connectivity (EC) Starter Kit or PIC32MZ Ethernet Starter Kit
board to a network hub or an Ethernet port on the development computer using the Ethernet patch cord provided in the kit.
4. Make sure the microSD card with the web pages is inserted into the microSD card slot on the MEB II.
5. Build, Download, and Run demonstration project on the target board.
6. A HTTP server is hosted by the demonstration application. Open a web browser, type http://mchpboard_e in the address bar
and press the Enter key. The demonstration application features following:
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a. Real-time hardware control and Dynamic Variables - On the Overview page the LEDs can be clicked to toggle LEDs on the
Ethernet Starter Board. The buttons on Ethernet Starter Board can be pressed to see the Buttons on the web page toggle. The
dynamic variables can be updated in real time on the HTTP server.
Note: LED functionality part of the demonstration is somewhat limited due to errata items related to the functional multiplexing on
GPIO and Ethernet pins.
b. Form Processing - Input can be handled from the client by using GET and POST methods.
c. Authentication - Shows an example to restricted access feature commonly used.
d. Cookies – Shows the example of storing small text stings on the client side.
e. File Uploads - Shows an example of file upload using POST method. The HTTP server can accept a user defined
MPFS/MPFS2 image file for web pages.
f. Send E-mail – Shows a simple SMTP POST methods.
g. Dynamic DNS – Exercise Dynamic DNS capabilities.
h. Network Configuration - MAC address, host name and IP address of the PIC32 Ethernet starter board can be viewed in the
Network Configuration page and some configuration can be updated.
3.8.4.1.3 web_server_nvm_mpfs
This section describes the steps necessary to begin using Microchip's TCP/IP Web server Demonstration Application.
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Description
The TCP/IP NVM MPFS web server demo (‘apps/tcpip/web_server_nvm_mpfs/firmware/pic32_ethernet_starter_kit.X’) exercises
the HTTP web server running on PIC32 devices. The Non-Volatile Memory (NVM) MPFS (Microchip Proprietary File System)
web server demonstration has the web pages stored in internal Flash and accessed through the MPFS API.
3.8.4.1.3.1 Supported Hardware
Lists supported demonstration and development hardware boards.
Description
Demo Board (click link for board information) Notes
PIC32 Ethernet Starter Kit --
PIC32MZ Embedded Connectivity (EC) Starter Kit --
3.8.4.1.3.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
No hardware related configuration or jumper setting changes are necessary.
3.8.4.1.3.3 Running the Demonstration
This section provides instructions on how to build and run the TCP/IP Web Server demonstration.
Description
To view the web page hosted by the demonstration application open a web browser, type http://mchpboard_e in the address bar
and press the enter key.
Please use the following procedure to run the demonstration:
1. Load demonstration project into MPLAB X IDE.
2. Connect the mini-B debugger port on-board the PIC32MZ Embedded Connectivity (EC) Starter Kit or PIC32MZ Ethernet
Starter KitStarter board to a USB port on the Development computer using the USB cable provided in the kit.
3. Connect the RJ-45 Ethernet port on the PIC32MZ Embedded Connectivity (EC) Starter Kit or PIC32MZ Ethernet Starter Kit
board to a network hub or an Ethernet port on the development computer using the Ethernet patch cord provided in the kit.
4. Build, Download, and Run demonstration project on the target board.
5. A HTTP server is hosted by the demonstration application. Open a web browser, type http://mchpboard_e in the address bar
and press the enter key. The demonstration application features following:
a. Real-time hardware control and Dynamic Variables - On the Overview page the LEDs can be clicked to toggle LEDs on the
Ethernet Starter Board. The buttons on Ethernet Starter Board can be pressed to see the Buttons on the web page toggle. The
dynamic variables can be updated in real time on the HTTP server.
Note: LED functionality part of the demonstration is somewhat limited due to errata items related to the functional multiplexing on
GPIO and Ethernet pins.
b. Form Processing - Input can be handled from the client by using GET and POST methods.
c. Authentication - Shows an example to restricted access feature commonly used.
d. Cookies – Shows the example of storing small text stings on the client side.
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e. File Uploads - Shows an example of file upload using POST method. The HTTP server can accept a user defined
MPFS/MPFS2 image file for web pages.
f. Send E-mail – Shows a simple SMTP POST methods.
g. Dynamic DNS – Exercise Dynamic DNS capabilities.
h. Network Configuration - MAC address, host name and IP address of the PIC32 Ethernet starter board can be viewed in the
Network Configuration page and some configuration can be updated.
3.8.5 Demonstration Board Information
Information on Hardware used by the TCP/IP Demonstration Applications.
Description
This section provide details on the different hardware boards that are used by the demonstration applications.
3.8.5.1 PIC32 Ethernet Starter Kit
Information on PIC32 Ethernet Starter Kit Hardware.
Description
This board provides a low-cost, modular development system for Microchip’s line of 32-bit Microcontrollers (MCUs)
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PIC32 Ethernet Starter Kit
More Information
Microchip Part Number: DM320004
Microchip Product Page
3.8.5.2 PIC32MZ Embedded Connectivity (EC) Starter Kit
Information on the PIC32MZ Embedded Connectivity (EC) Starter Kit.
Description
Microchip Part Number: DM320006 (without Crypto) or DM320006-C (with Crypto)
The top assembly of the board includes these key features, as indicated in Figure 1:
1. PIC32MZ2048ECH144 32-bit microcontroller.
2. Green power indicator LED.
3. On-board crystal or oscillator for precision microcontroller clocking (12 MHz).
4. USB connectivity for on-board debugger communications.
5. Green debug indicator LED.
6. Three push button switches for user-defined inputs.
7. Three user-defined indicator LEDs.
8. USB Type A receptacle connectivity for PIC32 host-based applications.
9. HOST mode power jumper.
10. Daughter board connectors for flexible Ethernet PHY options.
11. 32 kHz oscillator for RTCC and Timer1 (optional).
12. External 2 GB SQI memory for expanded memory application.
13. Jumper for using or disconnecting the on-board debugger.
NOTE: When running self-powered USB device applications, open the jumper JP1 to prevent possibly back-feeding voltage onto
the Vbus from one port on the host to another (or from one host to another).
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Figure 1: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Front)
The bottom assembly of the board includes these key features, as indicated in Figure 2:
1. PIC24FJ256GB106 USB microcontroller for on-board debugging.
2. Regulated +3.3V power supply for powering the starter kit via USB or expansion board.
3. Connector for various expansion boards.
4. USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 OTG/device-based applications.
5. 50 MHz Ethernet PHY oscillator.
6. USB Host and OTG power supply for powering PIC32 USB applications.
Figure 2: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Back)
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Microchip Part Number: DM320006 (without Crypto) or DM320006-C (with Crypto)
The top assembly of the board includes these key features, as indicated in Figure 1:
1. PIC32MZ2048ECH144 32-bit microcontroller.
2. Green power indicator LED.
3. On-board crystal or oscillator for precision microcontroller clocking (12 MHz).
4. USB connectivity for on-board debugger communications.
5. Green debug indicator LED.
6. Three push button switches for user-defined inputs.
7. Three user-defined indicator LEDs.
8. USB Type A receptacle connectivity for PIC32 host-based applications.
9. HOST mode power jumper.
10. Daughter board connectors for flexible Ethernet PHY options.
11. 32 kHz oscillator for RTCC and Timer1 (optional).
12. External 2 GB SQI memory for expanded memory application.
13. Jumper for using or disconnecting the on-board debugger.
NOTE: When running self-powered USB device applications, open the jumper JP1 to prevent possibly back-feeding voltage onto
the Vbus from one port on the host to another (or from one host to another).
Figure 1: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Front)
The bottom assembly of the board includes these key features, as indicated in Figure 2:
1. PIC24FJ256GB106 USB microcontroller for on-board debugging.
2. Regulated +3.3V power supply for powering the starter kit via USB or expansion board.
3. Connector for various expansion boards.
4. USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 OTG/device-based applications.
5. 50 MHz Ethernet PHY oscillator.
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6. USB Host and OTG power supply for powering PIC32 USB applications.
Figure 2: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Back)
3.8.5.3 Multimedia Expansion Board II (MEB II)
Provides details information on the Multimedia Expansion Board II (MEB) II.
Description
Microchip Part Number: DM320005-2
Product Page
The front side of the MEB II includes these key features, as shown in Figure 1:
1. Display daughter board connector (60-pin Hirose board-to-board connector).
2. mTouch™ buttons.
3. Push Button.
4. Power LED.
5. User LEDs.
6. VGA Camera (OVM7690).
7. PICtail™ Connector.
8. Analog temperature sensor.
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Figure 1: Multimedia Expansion Board II Layout (Front)
The underside of the MEB II includes these key features, as shown in Figure 2:
1. Regulated 5V and 3.3V power supply for powering the board via a 9-15V DC Adapter.
2. PIC32 Starter Kit connector (168-pin Hirose board-to-board connector).
3. 24-bit stereo audio codec (AK4953A).
4. Integrated 802.11bg wireless module (MRF24WG0MA).
5. Low-cost Bluetooth® HCI transceiver (BTM805).
6. EBI SRAM memory (IS61WV102416BLL).
7. microSD slot.
8. Analog accelerometer (ADXL325).
Figure 2: Multimedia Expansion Board II Layout (Back)
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3.9 USART Driver Demonstration
3.9.1 Introduction
This help manual contains instructions and information about MPLAB Harmony USART driver demo application, which are
contained in the MPLAB Harmony Library distribution.
Description
This application demonstrates how to use the MPLAB Harmony USART driver. This help manual describes the hardware
requirement and procedures to build and execute the demo project on Microchip development tools. In this demo application,
USART driver will initially transmit strings of data and then accept and characters received and transmit the data back. Error or
success status is indicated by LED display.
To know more about MPLAB Harmony USART driver, configuring the USART driver and API's provided by the USART driver,
refer to USART Driver Library documentation.
3.9.2 Release Notes
MPLAB Harmony Version: v0.70b USART Driver Demonstration: 0.01a Release Date: 18Nov2013
New This Release:
This is the first release of this USART driver demo application. This demo has been developed to support PIC32MX devices only.
Known Issues:
• Changes in USART driver interfaces will have impact on this demo application as well in subsequent releases
• This demo is has not been developed to run on PIC32MZ devices. Users must add a new configuration if intended to run on
PIC32MZ devices.
3.9.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
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BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
3.9.4 Hardware
This section describes how to select and use an appropriate development board and steps to configure the hardware to run this
USART driver demo.
3.9.4.1 Required Hardware
This section describes the overview of required device family and supported demonstration boards to run this USART driver
demo application.
Description
This section describes the hardware required to execute the Harmony USART driver demo application.
3.9.4.1.1 Supported Demonstration Boards
Lists supported demonstration and hardware development boards.
Description
Demonstration Board Notes
Explorer 16 Development Board -
3.9.4.1.2 Hardware Information
Information on hardware used by the USART driver demo application.
Description
The USART driver demo application can be tried across on hardware boards. This section provide details on the different
hardware boards that are used by the demo application.
3.9.4.1.2.1 Explorer 16 Development Board
Provides information on the Explorer 16 Development Board .
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Description
S1 - Reset button (MCLR)
S2 - Processor switch. This switch determines which processor is running, the processor on the board or the processor on the
Plug-In-Module (PIM).
S3, S4, S5, S6 - Application switches. For information about what pin is connected to this switch, please refer to the information
for the PIM in use.
D3 through D10 - Application LEDs. For information about what pin is connected to this LED, please refer to the information for
the PIM in use.
More Information:
Microchip Part Number: DM240001
3.9.4.1.2.2 PIC32MX795F512L Plug-in Module (PIM)
Provides information on the PIC32MX795F512L Plug-In-Module (PIM).
Description
This PIM is required while using the Explorer 16 Development Board.
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More Information
Microchip Part Number: MA320003
Information Sheet
3.9.4.2 Configuring the Hardware
This section describes how to configure the supported hardware.
Description
Explorer 16 Development Board
Below are the hardware hardware configuration settings required to execute this demo
1. Before attaching the PIC32MX795F512L PIM to the Explorer 16 Deveolpment Board, ensure that the processor select switch
(S2) is in the PIM Position.
2. Short JP2 on the Explorer 16 Development Board to enable the LEDs.
3.9.5 Building the Application
This section describes how to build this demo project.
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Description
Once the hardware is configured, you are ready to build this application.
Project Setup:
From MPLAB X IDE, Select "open project" and browse to this demo project location. This demo application is available in
"/apps/driver/usart/usart_echo/firmware/usart_echo.X". This directory contains all the application related source
files, header files as well as MPLAB X IDE project related workspace files.
How to build this demo application:
To build this demo in debug mode, Go to "Run" menu in MPLAB X IDE and select "Build Main Project" or select "Build Main
Project" in toolbar. Once the project gets compiled successfully, you can run this demo application.
For more information on how to compile and program projects, refer to the MPLAB X IDE help available through the help menu
in MPLAB X IDE.
Note: The appropriate project configurations should be selected before building the project for the configured hardware.
3.9.5.1 Configuring the Application
This section describes the list of configuration options , build options and how they are configured for this demo application.
Build options:
The default target device is selected as "PIC32MX795F512L" with optimization level as "0". The various optimization levels can
be selected from the list to run this demo.
Note: If the target device is changed, then appropriate PIM needs to be used to run this demo application
Configuration options:
All the demo application related configuration options are available in "system_config.h" file. This file is available in the "apps/driver/usart/usart_echo/firmware/src/system_config/pic32mx_default" directory based on the configured hardware.
Note: Based on the configurations, the demo application behavior will be changed.
3.9.5.2 Configuring the Libraries
This section describes the configuration options provided by MPLAB Harmony Libraries used by the application. The below
parameters are defined in "system_config.h" header file.
Parameter Name Description
#define
DRV_USART_INSTANCES_NUMBER
This macro defines the maximum number of hardware instances that will be used
by the application. The USART driver will support a maximum of that many
hardware instances.
#define
DRV_USART_CLIENTS_NUMBER
This macro defines the maximum number of clients that will be used by the
application. The USART driver will support a maximum of that many clients.
#define
DRV_USART_INTERRUPT_MODE
If this macro is set to "true", the application will run in interrupt mode. If this macro
is set to "false", the application will run in polling mode
#define
DRV_USART_INTERRUPT_SOURCE_TX
This macro defines the transmit interrupt source
#define
DRV_USART_INTERRUPT_SOURCE_RX
This macro defines the receive interrupt source
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#define SYS_USART_ID This macro defines the USART module number used in the appilcation
#define
DRV_USART_XFER_BUFFER_NUMBER
This macro defines the number of transfer buffers used in the application
#define APP_UART_BAUDRATE This macro defines the baud rate to be used
3.9.5.3 Customizing the Application
This section explains the steps involved in customizing the existing demo application.
Customizing Existing Demo Application:
Changing the USART module
In system_config.h header file, modify the SYS_USART_ID macro to change the USART module number.
Changing the demo to interrupt mode
By default, the USART demo application will run in polling mode. Below are the steps to be followed to run the demo in interrupt
mode.
1. Change #define DRV_USART_INTERRUPT_MODE to true in "system_config.h" file
2. Remove the DRV_USART_Tasks function call in sys_tasks in "system_task.c" file
3. Call the DRV_USART_Tasks function in ISR in "system_int.c" file
Changing USART settings
To change the USART related parameters such as baud rate, parity settings, number of stop bits, etc., select appropriate values
in drvUSARTInit structure in system_init.c file
After changing the above configurations, compile the customized application and program the target device.
3.9.6 Running the Application
This section demonstrates how to run the USART driver demo.
Description
Once the demo application has been compiled successfully for the intended configuration, program the firmware into the target
device.
Upon execution, the application will transmit the following strings through USART with settings as defined in the application.
/****************************************************
Welcome to Microchip USART Echo Demo App.
Press any character. Data will be echoed back.
Press 'ESC' key to exit the application
/****************************************************
After transmitting the above text, the firmware will read any characters received through USART and it will transmit back the
same data. If the received character is "ESC" (0x1B), the program will enetr into idle mode. Once in Idle mode, the firmware will
neither transmit nor receive any data. If the application enters Idle mode, LED 5 of the Explorer 16 Development Board will
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illuminate. If any error occurs, LED 9 of the Explorer 16 Development Board will illuminate.
3.9.7 Files
This section provides a complete list of source and header files used by the application and describes the purpose of adding
each files.
MPLAB Harmony installation follows a standard directory structure for all application solutions. In this directory structure, the
driver, plib, system services related source files, header files for this demo application are available in "/framework/". Below are the list of files added in this demo application.
Files Description
driver.h Driver Library Interface Header
drv_common.h This file defines all common macros and definitions used by the driver
drv_usart.h USART device driver interface file.
system.h System Service Interface Headers
sys_common.h This file contains system Common definitions and declarations
sys_module.h This file contains system module definitions
system_config.h This is file contains all the system configurations
system_definitions.h This contains system prototypes and definitions
app.h This file contains application related definitions and prototypes
config_performance.c BSP file for the Explorer 16 Development Board
drv_usart_dynamic.c This file contains USART device driver dynamic implementation
plib_int_pic32.c Interrupt Source implementation for PIC32 devices
sys_clk.c This file contains clock system service implementation
sys_clk_pic32.c This file contains clock system service implementation specific to PIC32 devices
sys_queue.c This file contains system queue services
sys_int_pic32.c This file contains functions related to the Interrupt System Service for PIC32 devices
sys_ports.c This file contains Ports System Service interface implementation.
app.c This file contains application related implementations
main.c This file contains application's main entry point
system_init.c This file contains source code necessary to initialize the system
system_int.c This file contains a definitions of the raw ISRs required to support the interrupt sub-system
system_tasks.c This file will contain any source code necessary to maintain various tasks in the system
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3.10 USB Demonstrations
3.10.1 USB Demonstrations
3.10.1.1 Introduction
USB Library Demonstration Applications Help
Description
This distribution package contains a variety of USB-related firmware projects that demonstrate the capabilities of the MPLAB
Harmony USB stack. This help file describes the hardware requirement and procedures to run these firmware projects on
Microchip demonstration and development boards.
To know more about MPLAB Harmony USB stack and configuring the USB stack and the APIs provided by the USB stack, refer
to the USB Library documentation.
3.10.1.2 Release Notes
MPLAB Harmony Version: v0.70b USB Demonstration: 0.01a Release Date: 18Nov2013
New This Release:
Nothing to report in this release.
Known Issues:
Device Stack Demonstration Applications:
All Device Stack Demonstration applications uses a custom Board Support Package (BSP) to access demonstration board
switches and LEDs. The board support package does not use PORTS Peripheral Library. In the next release, all Device Stack
Demonstration Applications will be updated to use the standard Harmony BSP. The demonstration application specific issues are
listed here:
cdc_com_port_single:
Nothing to report in this release.
cdc_com_port_dual:
Nothing to report in this release.
cdc_serial emulator:
• This version of the demo does not support baud rate change. The supported baud rate is 9600bps, 1 stop bit and no parity.
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• The application code accesses the UART2 peripheral SFR directly. This will be updated in the next release to use the USART
driver and the System Clock Service.
hid_basic:
Nothing to report in this release.
hid_keyboard:
Nothing to report in this release.
hid_joystick:
Nothing to report in this release.
hid_mouse:
Nothing to report in this release.
audio_speaker:
While running the pic32mz_sk_meb2_int_dyn configuration, a periodic glitch is heard in the output audio. This is a known issue
and will be fixed in the next release of the stack.
Host Stack Demonstration Applications:
All Host Stack Demonstration applications uses a custom Board Support Package (BSP) to access demonstration board
switches and LEDs. The board support package does not use PORTS Peripheral Library. In the next release, all Host Stack
Demonstration Applications will be updated to use the standard Harmony BSP.
cdc_basic:
This demo is not tested for the pic32mx_usb_sk_int_dyn configuration and may not function when built for this configuration.
msd_basic:
While running this demo, if the USB Flash drive already contains a file named “File.txt”, the file contents may become corrupted.
3.10.1.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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3.10.1.4 Demonstration Application Configurations
This topic provides information on the USB demonstration project configuration that are available in MPLAB Harmony.
Description
The available USB Demonstration application MPLAB X IDE projects feature support for multiple configurations. Selecting these
configurations allow for the demonstration projects to run across different PIC32 microcontrollers and development boards. The
following project configurations are available:
• pic32mx_usb_sk_int_dyn – Selecting this configuration will set up the demonstration application to run on the PIC32 USB
Starter Kit II development board, with the PIC32MX795F512L microcontroller. The system will be configured for interrupt
mode operation and drivers will be configured for dynamic operation mode.
• pic32mz_sk_int_dyn – Selecting this configuration will set up the demonstration application to run on the PIC32MZ
Embedded Connectivity (EC) Starter Kit development board, with the PIC32MZ2048ECH144 microcontroller. The system will
be configured for interrupt mode operation and drivers will be configured for dynamic operation mode.
• explorer16_pic32mx795f512l_int_dyn – Selecting this configuration will set up the demonstration application to run on the
Explorer 16 Development Board along with the PIC32MX795F512L microcontroller Plug In Module . The system will be
configured for interrupt mode operation and drivers will be configured for dynamic operation mode.
• pic32mx_usb_audio_int_dyn - Selecting this configuration will set up the demonstration application to run on PIC32 USB
Digital Audio Accessory Board along with the PIC32MX250F128B microcontroller. The system will be configured for interrupt
mode operation and drivers will be configured for dynamic operation mode.
• pic32mz_sk_meb2_int_dyn – Selecting this configuration will set up the demonstration application to run on the PIC32MZ
EC Starter Kit development board, with the PIC32MZ2048ECH144 microcontroller board attached to the Multimedia
Expansion Board II (MEB II). The system will be configured for interrupt mode operation and drivers will be configured for
dynamic operation mode.
The following figure shows how a configuration can be selected in MPLAB X IDE.
Alternatively, the active configuration can be selected in the Project Properties dialog box. The following table shows the
availability of a configuration across available USB device demonstration applications. Green indicates support. Red indicates no
support.
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The following table shows the availability of a configuration across available USB device demonstration applications. Green
indicates support. Red indicates no support.
3.10.1.5 Demonstrations
Description of USB Demonstrations
Description
The USB Demonstrations are grouped into USB Device Stack and USB Host Stack Demonstrations.
3.10.1.5.1 Device
3.10.1.5.1.1 cdc_com_port_single
Demonstrates a USB CDC device, emulating a serial COM port.
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Description
This demonstration application creates a USB CDC Device that enumerates as a single COM port on the host PC. The
application demonstrates two-way communication between the USB device and the PC host.
3.10.1.5.1.1.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.10.1.5.1.1.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.10.1.5.1.1.3 Running the Demonstration
Provides instructions on how to build and run the CDC single COM port demonstration.
Description
This demonstration allows the device to appear like a serial (COM) port to the host. In order to run this demonstration first
compile and program the target device. While compiling, select the pic32mx_usb_sk_xxx_xxx configurations for the PIC32M
USB Starter Kit II or select the pic32mz_sk_xxx_xxx configurations for PIC32MZ Embedded Connectivity (EC) Starter Kit. Attach
the device to the host. If the host is a PC and this is the first time you have plugged this device into the computer then you may
be asked for a .inf file.
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Select the “Install from a list or specific location (Advanced)” option. Point to the “/apps/usb/device/cdc_com_port_single/inf” directory.
Once the device is successfully installed, open up a terminal program, such as HyperTerminal. Select the appropriate COM port.
On most machines this will be COM5 or higher.
Once connected to the device, there are two ways to run this example project. Typing a key in the terminal window will result in
the device echoing the key pressed. So if the user presses “b”, the device will echo “c”. If the pushbutton SW1 is pressed the
device will echo "PUSH BUTTON PRESSED" to the terminal window.
Note: Some terminal programs, like HyperTerminal, require users to click the disconnect button before removing the device from
the computer. Failing to do so may result in having to close and open the program again in order to reconnect to the device.
3.10.1.5.1.2 cdc_com_port_dual
Demonstrates a USB CDC device, emulating dual serial COM ports - one looping back into the other.
Description
This demonstration application creates a USB CDC Device that enumerates as 2 serial ports on USB Host PC. This application
demonstrates the ability of the MPLAB Harmony USB stack to support multiple instances of the same device class.
3.10.1.5.1.2.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.10.1.5.1.2.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
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No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.10.1.5.1.2.3 Running the Demonstration
Provides instructions on how to build and run the CDC dual COM port demonstration.
Description
This demonstration allows the device to appear like dual serial (COM) ports to the host. In order to run this demonstration first
compile and program the target device. While compiling, select the pic32mx_usb_sk_xxx_xxx configurations for the PIC32 USB
Starter Kit II or select the pic32mz_sk_xxx_xxx configurations for PIC32MZ Embedded Connectivity (EC) Starter Kit. Attach the
device to the host. If the host is a PC and this is the first time you have plugged this device into the computer then you may be
asked for a .inf file.
Select the “Install from a list or specific location (Advanced)” option. Point to the “/apps/usb/device/cdc_com_port_dual/inf” directory.
Once the device is successfully installed, open up two instances of a terminal program, such as HyperTerminal. Select the
appropriate COM port for each of these terminal instance.
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To run the demonstration, type a character or string in one terminal window. The same character or string appears on the
second terminal window. Similarly, any character typed on second window appears on the first window.
Note: Some terminal programs, like HyperTerminal, require users to click the disconnect button before removing the device from
the computer. Failing to do so may result in having to close and open the program again in order to reconnect to the device.
3.10.1.5.1.3 cdc_serial_emulator
This application demonstrates the use of the CDC device class in implementing a USB-to-Serial Dongle.
Description
This application demonstrates the use of the CDC device class in implementing a USB-to-Serial Dongle. The application
enumerates a COM port on the PC. Data received through the CDC USB interface is forwarded to a UART. Data received on the
UART is forwarded to the CDC USB interface. This emulates a USB-to-Serial Dongle.
3.10.1.5.1.3.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB PIC32MX795F512L Plug-In Module (PIM) 1
Any commercially available USB-to-Serial dongle -
Note 1: This board cannot be used by itself. It requires an Explorer 16 Development Board (DM240001) and a USB PICtail Plus
Daughter Board (AC164131) in order to operate.
3.10.1.5.1.3.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
Explorer 16 Development Board Based Demonstrations
For all of the Explorer 16-based demonstration boards, please follow the following instructions:
1. Connect the USB PICtail Plus Daughter Board to the Explorer 16 Development Board.
2. Short JP2 and JP3 on the USB PICtail Plus Daughter Board
3. Open JP1 and JP4 on the USB PICtail Plus Daughter Board
4. Make sure that S2 on the Explorer 16 Development Board is switched to the "PIM" setting.
5. Short JP2 on the Explorer 16 Development Board to enable the LEDs.
6. Follow any processor specific instructions below. All instructions apply to the PIM unless otherwise stated:
PIC32MX795F512L PIM
7. Open J10.
8. Short pins 1 (marked "USB") and pin 2 (center) of jumpers J1 and J2.
3.10.1.5.1.3.3 Running the Demonstration
Provides instructions on how to build and run the CDC Serial Emulator Demonstration. Please refer to Release Notes for
demonstration limitations, if any.
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Description
This application demonstrates the use of the CDC device class in implementing a USB to Serial Dongle. The application
enumerates a COM port on the PC. Data received through the CDC USB interface is forwarded to a UART. Data received on the
UART is forwarded to the CDC USB interface. This emulates a USB-to-Serial Dongle.
1. Open the project in MPLAB X IDE. Make sure that exp16_pic32mx795f512l_int_dyn configuration is selected.
2. Build the code and program the device.
3. Connect the USB PICtail Plus Daughter Board to the Explorer 16 Development Board.
4. Power up the Explorer 16 Development Board and connect a debugger/programmer of your choice to the Explorer 16
Development Board.
5. Build the code and program the device.
6. Connect the mini-B device connector on the USB PICtail Plus Daughter Board to the PC. If the host is a PC and this is the first
time you have plugged this device into the computer, you may be asked for a .inf file.
7. Select the “Install from a list or specific location (Advanced)” option. Point to the “/apps/usb/device/cdc_serial_emulator/inf” directory.
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When enumerated successfully, LED D5 will be the only LED illuminated on the Explorer 16 Development board.
8. Open a terminal emulation program of your choice and select the enumerated USB COM port.
9. Connect the USB-to-Serial Dongle to the same PC.
10. Open another instance of the terminal emulation program and select the USB-to-Serial Dongle.
11. Connect the serial connector of the USB-to-Serial Dongle to the UART connector (P1) on the Explorer 16 Development
Board.
12. Choose a baud rate of 9600, 1 stop bit and no parity while opening both of the terminal emulation programs.
The setup should be similar to the following diagram.
Any text entered into the terminal 1 program will be echoed on terminal 2 and vice versa.
3.10.1.5.1.4 hid_basic
This demonstration application creates a custom HID device that can be controlled by a PC based utility.
Description
This application creates a custom HID device that can be controlled by a PC based utility. The device allows the USB Host utility
to control the LEDs on the board and query the status of a switch.
3.10.1.5.1.4.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.10.1.5.1.4.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
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PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.10.1.5.1.4.3 Running the Demonstration
Provides instructions on how to build and run the HID Basic demonstration.
Description
This demonstration uses the selected hardware platform as a HID class USB device, but uses the HID class for general purpose
I/O operations. While compiling, select the pic32mx_usb_sk_xxx_xxx configurations for the PIC32 USB Starter Kit II or select the
pic32mz_sk_xxx_xxx configurations for PIC32MZ Embedded Connectivity (EC) Starter Kit. Typically, the HID class is used to
implement human interface products, such as mice and keyboards. The HID protocol is however quite flexible, and can be
adapted and used to send/receive general purpose data to/from a USB device. Using the HID class for general purpose I/O
operations is quite advantageous, in that it does not require any kind of custom driver installation process. HID class drivers are
already provided by and are distributed with common operating systems. Therefore, upon plugging in a HID class device into a
typical computer system, no user installation of drivers is required, the installation is fully automatic.
HID devices primarily communicate through one interrupt IN endpoint and one interrupt OUT endpoint. In most applications, this
effectively limits the maximum achievable bandwidth for full speed HID devices to 64 kBytes/s of IN traffic, and 64 kBytes/s of
OUT traffic (64 kB/s, but effectively “full duplex”).
The GenericHIDSimpleDemo.exe program, and the associated firmware demonstrate how to use the HID protocol for basic
general purpose USB data transfer.
Before you can run the GenericHIDSimpleDemo.exe executable, you will need to have the Microsoft® .NET Framework Version
2.0 Redistributable Package (later versions probably okay, but not tested) installed on your computer. Programs which were built
in the Visual Studio® .NET languages require the .NET redistributable package in order to run. The redistributable package can
be freely downloaded from Microsoft’s website. Users of Windows Vista® operating systems will not need to install the .NET
framework, as it comes pre-installed as part of the operating system.
To launch the application, simply double click on the executable “GenericHIDSimpleDemo.exe” in the “\apps\usb\device\hid_basic\bin” directory. A window like that shown below should appear:
If instead of this window, an error message pops up while trying to launch the application, it is likely the Microsoft .NET
Framework Version 2.0 Redistributable Package has not yet been installed. Please install it and try again.
In order to begin sending/receiving packets to the device, you must first find and “connect” to the device. As configured by
default, the application is looking for HID class USB devices with VID = 0x04D8 and PID = 0x003F. The device descriptor in the
firmware project meant to be used with this demonstration uses the same VID/PID. If you plug in a USB device programmed with
the correct pre-compiled .hex file, and hit the “Connect” button, the other push buttons should become enabled. If hitting the
connect button has no effect, it is likely the USB device is either not connected, or has not been programmed with the correct
firmware.
Hitting the Toggle LED(s) should send a single packet of general purpose generic data to the HID class USB peripheral device.
The data will arrive on the interrupt OUT endpoint. The firmware has been configured to receive this generic data packet, parse
the packet looking for the “Toggle LED(s)” command, and should respond appropriately by controlling the LED(s) on the
demonstration board.
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The “Get Pushbutton State” button will send one packet of data over the USB to the peripheral device (to the interrupt OUT
endpoint) requesting the current pushbutton state. The firmware will process the received Get Pushbutton State command, and
will prepare an appropriate response packet depending upon the pushbutton state.
Following table shows the button that has to be pressed on the demonstration board to see the push button state changing.
Demonstration Board Button
PIC32 USB Starter Kit II SW1
3.10.1.5.1.5 hid_mouse
Demonstrates a USB HID device, emulating a mouse pointing device.
Description
This demonstration application creates a USB HID based 2 button mouse device. When connected, the device emulates mouse
operation by moving the cursor in a circular pattern.
3.10.1.5.1.5.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.10.1.5.1.5.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.10.1.5.1.5.3 Running the Demonstration
Provides instructions on how to build and run the HID Mouse Demonstration.
Description
This demonstration uses the selected hardware platform as a USB mouse. While compiling, select the pic32mx_usb_sk_xxx_xxx
configurations for the PIC32 USB Starter Kit II or select the pic32mz_sk_xxx_xxx configurations for PIC32MZ Embedded
Connectivity (EC) Starter Kit. Before connecting the board to the computer through the USB cable please be aware that the
device will start moving the mouse cursor around on the computer. There are two ways to stop the device from making the
cursor to continue to move. The first way is to disconnect the device from the computer. The second is to press the correct
button on the hardware platform. Pressing the button again will cause the mouse cursor to start moving in a circle again.
Following table shows the button that has to be pressed on the demonstration board to stop the circular motion:
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Demonstration Board Button
PIC32 USB Starter Kit II SW1
3.10.1.5.1.6 hid_keyboard
Demonstrates a USB HID device, emulating a keyboard.
Description
This demonstration application creates a Generic HID keyboard. Pressing a key on the board emulates a keyboard key press.
3.10.1.5.1.6.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.10.1.5.1.6.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.10.1.5.1.6.3 Running the Demonstration
Provides instructions on how to build and run the USB HID Keyboard demonstration.
Description
This demonstration uses the selected hardware platform as a USB keyboard. While compiling, select the
pic32mx_usb_sk_xxx_xxx configurations for the PIC32 USB Starter Kit II or select the pic32mz_sk_xxx_xxx configurations for
PIC32MZ Embedded Connectivity (EC) Starter Kit. Before pressing the button, select a window in which it is safe to type text
freely. Pressing the button on the demonstration board will cause the device to print a character on the screen.
Following table shows the button that has to be pressed on the demonstration board to print a character.
Demonstration Board Button
PIC32 USB Starter Kit II SW1
3.10.1.5.1.7 hid_joystick
Demonstrates a USB HID device emulating a joystick.
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Description
This demonstration application creates a custom HID joystick. This application is only intended to demonstrate creation of
Joystick HID Report descriptors and may not be a definite end solution. The end application requirements may need the report
descriptor to be modified.
3.10.1.5.1.7.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Starter Kit II -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
3.10.1.5.1.7.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Starter Kit II
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit
No hardware related configuration or jumper setting changes are necessary.
3.10.1.5.1.7.3 Running the Demonstration
Provides instructions on how to build and run the USB HID Josytick demonstration.
Description
This demonstration uses the selected hardware platform as a USB Joystick. While compiling, select the
pic32mx_usb_sk_xxx_xxx configurations for the PIC32 USB Starter Kit II or select the pic32mz_sk_xxx_xxx configurations for
PIC32MZ Embedded Connectivity (EC) Starter Kit. To test the joystick feature, go to the “\apps\usb\device\generic_device\bin” directory. A window like that shown below should appear:
If instead of this window, an error message pops up while trying to launch the application, it is likely the Microsoft .NET
Framework Version 3.5 Redistributable Package has not yet been installed. Please install it and try again.
In order to begin sending/receiving packets to the device, you must first find and “connect” to the device. As configured by
default, the application is looking for USB devices with VID = 0x04D8 and PID = 0x0204. The device descriptor in the firmware
project meant to be used with this demonstration uses the same VID/PID. To run the demonstration program the USB device
with the correct precompiled .hex file. If you are connecting the device for the first time, Windows pops up a window asking you
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to install the driver for the device. When asked for the driver point it to the inf file provided along with the demonstration.
Windows takes while to install the driver for the USB device that is just plugged in. Open the Device manager and ensure that
the USB device is listed under the ‘Libusb Demo Devices’. Once the driver is installed hit the “Connect” button, the other
pushbuttons should become enabled. If hitting the connect button has no effect, it is likely the USB device is either not
connected, or has not been programmed with the correct firmware.
If a different VID/PID combination from the default is desired, then the descriptors in the firmware must be changed as well as
the inf file. The easiest way to change the inf file is to use the utility provided with the LibUSB download for windows on the
LibUSB website. This utility can create a new inf file based on a connected device. So make sure to change the VID/PID
combination first in the firmware, connect the device, and then run the inf file creator utility. After completing the utility, a new
signed driver with inf file is created.
Once the driver is installed hit the “Connect” button, the other pushbuttons should become enabled. If hitting the connect button
has no effect, it is likely the USB device is either not connected, or has not been programmed with the correct firmware.
Hitting the Toggle LED(s) should send a single packet of general purpose generic data to the Custom class USB peripheral
device. The data will arrive on the Bulk OUT endpoint. The firmware has been configured to receive this generic data packet,
parse the packet looking for the “Toggle LED(s)” command, and should respond appropriately by controlling the LED(s) on the
demonstration board.
The “Get Pushbutton State” button will send one packet of data over the USB to the peripheral device (to the Bulk OUT endpoint)
requesting the current pushbutton state. The firmware will process the received Get Pushbutton State command, and will
prepare an appropriate response packet depending upon the pushbutton state.
The PC then requests a packet of data from the device (which will be taken from the Bulk IN endpoint). Once the PC application
receives the response packet, it will update the pushbutton state label.
Try experimenting with the application by holding down the appropriate pushbutton on the demonstration board, and then
simultaneously clicking on the “Get Pushbutton State” button. Then try to repeat the process, but this time without holding down
the pushbutton on the demonstration board.
Following table shows the button that has to be pressed on the demonstration board to see the push button state changing.
Demonstration Board Button
PIC32 USB Starter Kit II SW1
3.10.1.5.1.10 audio_speaker
Demonstrates a USB Audio Device that emulates a USB speaker.
Description
This demonstration application creates uses the USB Audio Device class to implement a speaker.
3.10.1.5.1.10.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32 USB Digital Audio Accessory Board -
PIC32MZ Embedded Connectivity (EC) Starter Kit -
Multimedia Expansion Board II (MEB II) -
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3.10.1.5.1.10.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32 USB Digital Audio Accessory Board
No hardware related configuration or jumper setting changes are necessary.
PIC32MZ Embedded Connectivity (EC) Starter Kit and Multimedia Expansion Board II (MEB II)
1) Fix the PIC32MZ Embedded Connectivity (EC) Starter Kit on the MEB II board.
2) Connect a Headphone to the HP OUT jack on the MEB II board.
3.10.1.5.1.10.3 Running the Demonstration
Provides instructions on how to build and run the Audio Speaker Demonstration.
Description
This demonstration functions as a speaker when plugged into a computer. Using any feature on the computer that normal
produces sound on the speaker will work with this demonstration. The feature unit only supports the Mute control.
Please note that some applications lock into a sound source when they open or close (such as some web browsers or plug-ins),
so that if you plug in the speaker with the web page or video already playing, the sound might not get redirected to the USB
based speakers until you close and reopen the browser.
The audio device created in this demonstration has the following characteristics:
• Sampling rate of 48 kHz
• 2 Channel (Stereo)
• PCM Format - 16 bits per Sample
• Asynchronous Audio Endpoint
3.10.1.5.2 Host
3.10.1.5.2.1 cdc_basic
This application demonstrates the use of the CDC Host Class Driver to enumerate and operate a CDC Device.
Description
This application demonstrates the use of the CDC Host Class Driver to enumerate and operate a CDC Device. The application
uses the USB Host layer and CDC class driver to enumerate a CDC USB device. The demonstration host application then
operates and uses the functionality of the attached CDC Device.
3.10.1.5.2.1.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
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Description
Demonstration Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit -
PIC32 USB Starter Kit II -
Hardware required for USB Device CDC Serial Emulator Demonstration Application -
3.10.1.5.2.1.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32MZ Embedded Connectivity (EC) Starter Kit
This hardware does not require any configuration.
PIC32 Starter Kit USB II
This hardware does not require any configuration.
3.10.1.5.2.1.3 Running the Demonstration
Provides instructions on how to build and run the USB Host CDC Basic Demo. Please refer to the Release Notes for
demonstration limitations, if any.
Description
This application demonstrates the use of the CDC Host Class Driver to enumerate and operate a CDC Device. The application
uses the USB Host layer and CDC class driver to enumerate a CDC USB device. The demonstration host application then
operates and uses the functionality of the attached CDC Device.
1. Open the project in MPLAB X IDE and select the desired project configuration.
2. Build the code and program the device.
3. Follow the directions for setting up and running the cdc_serial_emulator USB device demonstration.
4. Connect the UART (P1) port on the Explorer 16 Development Board (running the cdc_serial_emulator demonstration) to a
USB Host PC via a commercially available Serial-to-USB Dongle.
5. Start a terminal program on the USB Host PC and select the Serial-to-USB Dongle as the communication port. Select the
baud rate as 9600, no parity, 1 stop bit and no flow control.
6. Connect the mini – B connector on the USB PICtail Plus Daughter Board , of the cdc_serial_emulator demonstration setup, to
the Type – A USB host connector on the starter kit.
7. A prompt (“LED : “) will be displayed immediately on the terminal emulation program.
8. Pressing either the 1, 2, or 3 key on the USB Host keyboard will cause LED 1, 2, or 3 on the PIC32 Starter kit (running the
USB CDC Host application) to switch on, respectively.
9. The prompt will again be displayed on terminal emulation program, and step 8 can be repeated.
The setup should be similar to the following diagram.
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The cdc_serial_emulator demonstration emulates a USB-to-Serial Dongle. The CDC Host (running the cdc_basic demonstration
application) sends the prompt message to the CDC device. The CDC device forwards the prompt to the UART port from where it
is transmitted to the PC USB Host through the USB-to-Serial Dongle. A key press on the PC USB Host is transmitted to the CDC
device, which in turn presents the key press data to the CDC host. The cdc_basic demonstration then analyzes the key press
data and switches on the respective LED.
3.10.1.5.2.2 msd_basic
This application demonstrates the use of the MSD Host Class Driver to write a file to USB Flash Drive.
Description
This application demonstrates the use of the MSD Host Class Driver to write a file to a USB Flash drive. The application uses the
USB Host layer , MSD class driver and the MPLAB Harmony File System Framework to enumerate a USB Flash drive and to
write a file to it.
3.10.1.5.2.2.1 Supported Demonstration Boards
Lists supported demonstration and development hardware boards.
Description
Demonstration Board (click link for board information) Notes
PIC32MZ Embedded Connectivity (EC) Starter Kit -
PIC32 USB Starter Kit II -
3.10.1.5.2.2.2 Configuring the Hardware
Describes how to configure the supported hardware.
Description
PIC32MZ Embedded Connectivity (EC) Starter Kit
This hardware does not require any configuration.
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PIC32 Starter Kit USB II
This hardware does not require any configuration.
3.10.1.5.2.2.3 Running the Demonstration
Provides instructions on how to build and run the USB Host MSD Basic demonstration. Please refer to theRelease Notes for
demonstration limitations, if any.
Description
This application demonstrates the use of the MSD Host Class Driver to write a file to USB Flash drive. The application uses the
USB Host layer, MSD class driver and the MPLAB Harmony File System Framework to enumerate a USB Flash drive and to
write a file to it.
1. Open the project in MPLAB X IDE and select the desired project configuration.
2. Build the code and program the device.
3. With the code running, attach a USB Flash drive to the Host connector on the starter kit.
4. The demonstration application will then create a file named “File.txt”. It will then write the text “Hello World” to this file, and
then close the file.
5. The demonstration will then move to Idle mode, which is indicated when LED 2 on the starter kit lights up.
6. The USB Flash drive can then be attached to a USB Host PC to verify the demonstration application operation.
7. Steps 3 through 6 can be repeated.
8. If the USB Flash drive already contains a file with the name “File.txt”, the demonstration application will append the text “Hello
World” to the end of the file name.
3.10.1.6 Demonstration Board Information
Information on Hardware used by the USB Library Demo Applications.
Description
The USB Library Demo Applications can be tried across on hardware boards. This section provide details on the different
hardware boards that are used by the demo applications.
3.10.1.6.1 PIC32 USB Starter Kit II
Provides details information on the PIC32 USB Starter II.
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Description
SW1 - Application switch. Tied to RD6.
SW2 - Application switch. Tied to RD7.
SW3 - Application switch. Tied to RD13.
LED1 - Application LED. Tied to RD0.
LED2 - Application LED. Tied to RD1.
LED3 - Application LED. Tied to RD2.
This board supports the following USB Device demonstrations:
• CDC Single COM port (cdc_com_port_single).
• CDC Dual COM port (cdc_com_port_dual)
• HID Basic (hid_basic)
• HID Mouse (hid_mouse)
• HID Keyboard (hid_keyboard)
• HID Joystick (hid_joystick)
• MSD Flash Drive (msd_basic)
• Generic USB Device (generic_device)
More Information
Microchip Part Number : DM320003-2
3.10.1.6.2 Explorer 16 Development Board
Provides information on the Explorer 16 Development Board
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Description
S1 - Reset button (MCLR)
S2 - Processor switch. This switch determines which processor is running, the processor on the board or the processor on the
Plug-In-Module (PIM).
S3, S4, S5, S6 - Application switches. For information about what pin is connected to this switch, please refer to the information
for the PIM in use.
D3 through D10 - Application LEDs. For information about what pin is connected to this LED, please refer to the information for
the PIM in use.
This board support the following USB Host demos:
1. CDC Host (cdc_serial)
More Information:
Microchip Part Number: DM240001
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3.10.1.6.3 PIC32MX795F512L Plug-In-Module (PIM)
Provides information on the PIC32MX795F512L Plug-In-Module (PIM).
Description
This PIM is required while using the Explorer 16 Development Board.
More Information
Microchip Part Number: MA320003
Information Sheet
3.10.1.6.4 PIC32 USB Digital Audio Accessory Board
Provides information on the PIC32 USB Digital Audio Accessory Board
Description
This board support the following USB Device demonstration:
Audio Speaker (audio_speaker)
More Information:
Microchip Part Number: DM320014
3.10.1.6.5 PIC32MZ Embedded Connectivity (EC) Starter Kit
Provides details information on the PIC32MZ Embedded Connectivity (EC) Starter Kit.
Description
Microchip Part Number: DM320006 (without Crypto) or DM320006-C (with Crypto)
The top assembly of the board includes these key features, as indicated in Figure 1:
1. PIC32MZ2048ECH144 32-bit microcontroller.
2. Green power indicator LED.
3. On-board crystal or oscillator for precision microcontroller clocking (12 MHz).
4. USB connectivity for on-board debugger communications.
5. Green debug indicator LED.
6. Three push button switches for user-defined inputs.
7. Three user-defined indicator LEDs.
8. USB Type A receptacle connectivity for PIC32 host-based applications.
9. HOST mode power jumper.
10. Daughter board connectors for flexible Ethernet PHY options.
11. 32 kHz oscillator for RTCC and Timer1 (optional).
12. External 2 GB SQI memory for expanded memory application.
13. Jumper for using or disconnecting the on-board debugger.
NOTE: When running self-powered USB device applications, open the jumper JP1 to prevent possibly back-feeding voltage onto
the Vbus from one port on the host to another (or from one host to another).
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Figure 1: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Front)
The bottom assembly of the board includes these key features, as indicated in Figure 2:
1. PIC24FJ256GB106 USB microcontroller for on-board debugging.
2. Regulated +3.3V power supply for powering the starter kit via USB or expansion board.
3. Connector for various expansion boards.
4. USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32 OTG/device-based applications.
5. 50 MHz Ethernet PHY oscillator.
6. USB Host and OTG power supply for powering PIC32 USB applications.
Figure 2: PIC32MZ Embedded Connectivity (EC) Starter Kit Layout (Back)
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3.10.1.6.6 Multimedia Expansion Board II (MEB II)
Provides details information on the Multimedia Expansion Board II (MEB) II.
Description
Microchip Part Number: DM320005-2
Product Page
The front side of the MEB II includes these key features, as shown in Figure 1:
1. Display daughter board connector (60-pin Hirose board-to-board connector).
2. mTouch™ buttons.
3. Push Button.
4. Power LED.
5. User LEDs.
6. VGA Camera (OVM7690).
7. PICtail™ Connector.
8. Analog temperature sensor.
Figure 1: Multimedia Expansion Board II Layout (Front)
The underside of the MEB II includes these key features, as shown in Figure 2:
1. Regulated 5V and 3.3V power supply for powering the board via a 9-15V DC Adapter.
2. PIC32 Starter Kit connector (168-pin Hirose board-to-board connector).
3. 24-bit stereo audio codec (AK4953A).
4. Integrated 802.11bg wireless module (MRF24WG0MA).
5. Low-cost Bluetooth® HCI transceiver (BTM805).
6. EBI SRAM memory (IS61WV102416BLL).
7. microSD slot.
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8. Analog accelerometer (ADXL325).
Figure 2: Multimedia Expansion Board II Layout (Back)
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4 Building Projects Help
4 MPLAB Harmony Help
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4.1 Building Projects
4.1.1 Introduction
This section describes the MPLAB X IDE projects that are provided to build binary (.a file) versions of key MPLAB Harmony
libraries.
Description
The following MPLAB Harmony libraries are provided in prebuilt binary (“.a” file) format because source code is not released or
to provide optimal performance for users of the free version of the compiler. The MPLAB X IDE projects used to build these
libraries are provided so that you can rebuild these libraries with different build parameters, optimization settings, and/or debug
symbols if desired.
Note: Building these libraries with high optimization settings will require a fully licensed version of the necessary Microchip XC
compiler.
Build Projects Folder: “/build”
Library Description
framework/crypto MPLAB Harmony Encryption/Decryption Library
framework/zlib MPLAB Harmony Compress/Decompression Library
framework/math/dsp MPLAB Harmony Digital Signal Processing Library
framework/math/libq MPLAB Harmony Fixed-point Math Library
framework/peripheral MPLAB Harmony Peripheral Library Build Project
4.1.2 Release Notes
MPLAB Harmony Version: v0.70b Building Projects: 0.70b Release Date: 18Nov2013
New This Release:
Peripheral Libraries
• Nothing to report in this release
Known Issues:
Peripheral Libraries
• Build configurations were not created for all PIC32 devices. As a workaround, select any configuration and choose a different
processor from the Project Properties dialog. This will require you to change the name of the output file to match the name of
the selected processor.
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4.1.3 Using the Build Projects
This section describes how to use the MPLAB Harmony build projects to generate binary (“.a” file) libraries that can be linked into
your project.
Description
The following information describes how to use the MPLAB Harmony build projects to generate binary (“.a” file) libraries that can
be linked into your project.
Prerequisites
To build MPLAB Harmony libraries, you must have the following installed on your development workstation:
• MPLAB X IDE (v1.95 or higher)
• MPLAB XC32 Compiler (v1.30 or higher)
• Appropriate compiler license for your desired optimization settings
Build Instructions
The following general instructions apply to all MPLAB Harmony library build projects. Refer to the related “Libraries” section for
additional information about building specific libraries.
1. Start MPLAB X IDE.
2. Open the desired build project.
3. Set it as the “main” project.
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4. Select the desired build configuration.
Note: Different libraries provide different build configurations, depending on the set of possible choices that are relevant to that
library. For example, the build project for the PIC32MX peripheral libraries (shown above) allows you to select the desired
PIC32MX processor. Other libraries may allow you to choose the desired optimization level or feature set. Refer to the related
“Libraries” section for information on the configurations provided by the build project for the library you want to build.
5. If required, select the desired processor (or other project settings, if desired).
Note: Projects that provide processor-specific configurations will not require this step.
a. Open the “Project Properties” dialog box.
b. Select the desired processor.
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6. Build the library.
7. Copy the binary “.a” library file to your project folder.
8. Add the binary “.a” library file to your project.
4.1.4 Supported Libraries
4.1.4.1 Crypto Library
This section describes MPLAB X IDE projects used to build the MPLAB Harmony Crypto libraries.
Description
The Crypto Library project is contained in the build/framework/crypto folder in the crypto.X project. The library contains functions
for operations on blocks of data.
Encryption/decryption operations can be done using AES, RSA, DES, Triple DES, and ECC.
Authentication/hashing can be done using MD5, SHA-1, SHA-256, SHA-384, and SHA-512.
Password-based key derivation can be done with HMAC.
Compression and decompression can be done using Huffman Encoding.
Random numbers can be created either one at a time or in a block.
4.1.4.2 Compression Library
This section describes MPLAB X IDE projects used to build the MPLAB Harmony compression/decompression “zlib” libraries.
Description
The “zlib” libraries consists of routines for handling gzip (.gz) files, include compression and decompression.
The library also contains functions that provide the Huffman compression available in the Crypto library.
4.1.4.3 DSP Math Library
This section describes MPLAB X IDE projects used to build the MPLAB Harmony DSP math libraries.
Description
The DSP Math Library consists of routines that are optimized in assembly to take advantage of the microAptivTM core of the
PIC32MZ devices. The library operates on fixed point integers, which are scaled to represent floating point numbers. Many
functions are available in both 16-bit and 32-bit numerical formats.
The library contains functions for mathematical operations on a vector (or array) of values, complex scalar values and matrixes.
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Operations include add, subtract, multiply, power, data generation, and in the cases of vectors more complex functions including
statistics.
The DSP Math Library also contains a full set of digital filtering functions which include FIR and IIR primitives, as well as more
complex architectures (e.g., cascade and parallel bi-quad structures).
Finally the library contains a number of transform functions include FFT and inverse FFT, as well as a number of windowing
functions.
Some functions in the DSP Math Library require the use of the LIBQ Fixed Point Math library as well. In those cases the LIBQ
library must also be installed with your project. Details on dependent functions are found in the DSP Math Library help file under
the remarks section for that specific function.
4.1.4.4 Fixed-Point Math Library
This section describes MPLAB X IDE projects used to build the MPLAB Harmony fixed-point math “libq” libraries.
Description
The Fixed-Point Math Library consists of routines in optimized assembly for performing advanced mathematical operations on a
scalar. This is similar in construction to the floating point equivalent math.h file that is included with the compiler. All functions are
performed using fixed-point integer operations and generally available in both high precision and low precision variants. Lower
precision functions generally perform faster and may be suited for time critical operations.
4.1.4.5 Peripheral Libraries
This section describes MPLAB X IDE projects used to build the MPLAB Harmony peripheral libraries.
Description
The MPLAB Harmony peripheral libraries are implemented almost entirely using C-language inline functions. This is done for
efficiency so that the compiler can generate a few simple instructions in place of multiple layers of function calls when function
parameters are passed as constants. However, if the project that uses the peripheral library is built with low optimization settings,
the compiler may generate a function call instead of “inlining” the function implementation. Unfortunately, this will cause an
“undefined symbol” error at link time if the linker cannot find an actual implementation of the function to which it can link the “call”.
To satisfy the liker (and to provide optimized PLIB operation, even when low compiler optimization settings are used in your
project), the MPLAB Harmony peripheral libraries must be prebuilt as ‘.a’ file, linkable libraries. The appropriate MPLAB X IDE
peripheral library “.a” file for the processor in use must be added to the MPLAB X IDE project so that the linker can use them.
Note: Prebuilt binary “.a” files are provided for all supported processors in the MPLAB Harmony installation in the following
folder: /bin/framework/peripheral.
The MPLAB Harmony peripheral library “.a” file build projects are provided so that you may rebuild the binary peripheral library
“.a” files using any desired optimization settings. However, if you do this, you must have the appropriate xC compiler and you
must copy the resultant “.a” file to your project folder and add it to your MPLAB X IDE project. (See the “Build Instructions”
section for details of how to build the library.).
Build Configurations
Different MPLAB X IDE projects are provided for different processor families to build the peripheral libraries for MPLAB
Harmony. Each project provides a set of MPLAB X IDE configurations, one for each supported processor. For example, the
“mplab_pic32mx_plib.X” project provides configurations for each device in the PIC32MX family. To identify which devices are
supported, open the MPLAB X IDE project that is named after the device family in which you are interested, select the MPLAB X
IDE configuration named after the device you want to use, and look at the project properties to verify the device that is selected.
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Key Configuration Options
To build the peripheral library binary “.a” files, there are two key configuration options that must be defined, as follows:
#define INLINE_API extern
#define INLINE static inline
These two configuration items are defined in the source file (“peripehral.c”), which then directly includes the peripheral library
implementation headers.
Note: This has already been done for you. This information is provided strictly for reference.
During normal peripheral library use, both of these options are defined as “extern inline” so that the compiler can choose
between generating a function call or generating inline code, directly in the calling function (as described above). However, to
build the binary library “.a” files the peripheral library Application Program Interface (API) functions must be exposed as global
“external” symbols. The “INLINE_API” attribute is placed as an attribute on all PLIB API function implementations. So, defining it
as “extern” allows the compiler to expose these functions within the library “.a” file so that the linker can find them. The VREG
and other “internal” functions prefixed by the “INLINE” attribute are then defined as “static inline” functions for efficiency.
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5 Framework Help
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5.1 Driver Library Help
5.1.1 Driver Library Overview
A device driver provides a simple well-defined interface to a hardware peripheral that can be used without operating system
support or that can be easily ported to a variety of operating systems. The basic driver operations allow an application to interact
with a device, reading and writing data, as if it was a simple file. More specific operations are present on most drivers and the
kind of specific operations available depends on the peripheral whose functionality is being exposed by the driver. A driver has
the following fundamental responsibilities:
1. Providing a highly-abstracted interface to a peripheral
2. Controlling access to a peripheral
3. Managing the state of a peripheral
The diagram below illustrates how a driver interacts with the other pieces of the system.
• The application calls the well defined driver interface to use the services provided by the driver.
• The driver calls various system services to perform the tasks that are possibly shared across other drivers.
• The driver also calls the peripheral library of the peripheral that its abstracting the interface to.
• Driver State machine can be invoked by the system task service (polling system) or the driver state machine can be invoked
from an ISR.
The driver provided the interfaces which can be broken down into the following two categories : ( is the abbreviation
identifying the module)
• System Operation - The interfaces for the system operation should be called by the system. Each driver can support all of
the system interfaces, or it can choose to not support the optional system interfaces. The system interfaces are
• DRV__Initialize - This routine initializes hardware for the index instance of the module, using the
hardware initialization given data. It also initializes any internal data structures. The DRV__Status operation will
return SYS_STATUS_READY when this operation has completed. Every driver module should define its own initialization
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data structure type named “DRV__INIT”. This structure must be an extension of the SYS_MODULE_INIT structure
(i.e. its first member must be the SYS_MODULE_INIT structure or equivalent). Any parameter that can change the power
state of the module must be included in the data structure. Once the Initialize operation has been called, the Deinitialize
operation must be called before the Initialize operation can be called again.
• DRV__Reinitialize - This routine reinitializes and refreshes the hardware using the hardware initialization given
data. The DRV__Status operation will return SYS_STATUS_READY when this operation has completed. It does not
clear or reinitialize internal data structures (although it may change the value of a few appropriate data items necessary to
manage the new hardware state) and it does not disconnect or interrupt any ongoing client operations.This operation can
be used to change the power state of the peripheral the module manages.
• DRV__Deinitialize - This routine de-initializes the index instance of the module, disabling its operation
(and any hardware for driver modules).The DRV__Status operation will return SYS_STATUS_READY when this
operation has completed.
• DRV__Status - The Status operation can be used to determine when any of the other three module operations has
completed. If the Status operation returns SYS_STATUS_BUSY, the previous operation has not yet completed. Once the
Status operation returns “SYS_STATUS_READY”, any previous operations have completed.
• The value of SYS_STATUS_READY is 1. Values between 1 and 10 are reserved for system defined “ready” states. A
module may define module-specific “ready” or “run” states greater than or equal to 10
(SYS_STATUS_READY_EXTENDED).
• The value of SYS_STATUS_ERROR is -1. Values between -1 and -10 are reserved for system-defined errors. A module
may define module-specific error values of less than or equal to -10 (SYS_STATUS_ERROR_EXTENDED).
• If the Status operation returns an error value, the error may be cleared by calling the reinitialize operation. If that fails,
the deinitialize operation will need to be called, followed by the initialize operation to return to normal operations.
(Remember to check the value returned by the Status routine after calling any of the module operations to find out when
they have completed.)
• DRV__Tasks - Used to maintain the driver’s state machine and implement its ISR. It is normally only called by the
system’s tasks routine or by an Interrupt Service Routine (ISR).
The usage model of the system interfaces is demonstrated in the diagram below:
The system is also responsible for either calling the Tasks routine through an ISR or poll the Tasks routine in a polling
environment.
• Client Operation - The interfaces provided by the driver for client operation, can be called by the application. Each driver can
provide a set of client interfaces, which supports the operation model of the peripheral that the driver is supporting. The client
interfaces can include
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• DRV__Open - This routine opens a driver for use by any client module and provides an “open-instance” handle that
must be provided to any of the other driver operations to identify the caller and the instance of the driver/hardware module.
• DRV__Close - This routine closes an opened-instance of a driver, invalidating the given handle. This routine is
optional, if the driver is designed to never be closed.
• DRV__ClientStatus - This routine provides the client, the status of the driver.
• DRV__ - This is the basic format of a driver interface routine. Driver interface routines (other than the
system module routines and the basic device driver routines) should follow this format.
The general usage model of the client interfaces is demonstrated in the diagram below, each driver will document usage model
specific to the driver in the driver help file.
Driver Configuration
A driver provides a set of configurations which can be divided into following categories:
1. Build Configuration Selection Configurations - The driver supports selecting the driver instance at build time (static
configuration) or at run time (dynamic configuration). A driver also supports selecting the number of clients that can possibly
connect to an hardware instance. All drivers will provide DRV__DRIVER_OBJECTS_NUMBER, when this
configuration macro is defined driver is built in dynamic driver configuration, else it is built in static driver configuration. The
number assigned to DRV__DRIVER_OBJECTS_NUMBER controls the maximum number of driver objects that can be
used. If a driver supports multiple clients it will provide DRV__CLIENT_OBJECTS_NUMBER, when this configuration
macro is defined driver is built to support multiple clients, else the driver is built to support single client. The number assigned
to DRV__DRIVER_OBJECTS_NUMBER controls the maximum number of client objects that can be used.
2. Initialization Overrides - Initialization overrides are provided to enable configuration of the hardware statically and with low
run time overhead. These override the parameters if also passed dynamically to Initialize or Reinitialize routine.
3. Other operational configurations - These can control the functionality of the driver or other setting of the driver that are
required for support core or optional functionality.
A driver allows the application to use the dynamic interface for all the above configuration when the application chooses the
appropriate configurations at build time. This is the preferred method of usage for the drivers.
As an exception, if the application wants to use multiple configurations in the same build for a driver type, or it needs to use
multiple instances of the same driver type, it needs to directly use the static single - client configuration interfaces, or it needs to
use the static multiple - client configuration interfaces.
While using the driver the static single client driver configuration, the application and system can choose to ignore the
SYS_MODULE_INDEX, SYS_MODULE_OBJ and DRV_HANDLE passed and returned to the driver and system interfaces.
While using the driver the static multiple client driver configuration, the application and system can choose to ignore the
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SYS_MODULE_INDEX and SYS_MODULE_OBJ passed and returned to the driver and system interfaces.
5.1.1.1 Data Types
Enumerations
Name Description
DRV_CLIENT_STATUS Identifies the current status/state of a client's connection to a driver.
DRV_IO_BUFFER_TYPES Identifies to which buffer a device operation will apply.
DRV_IO_INTENT Identifies the intended usage of the device when it is opened.
Types
Name Description
DRV_HANDLE Handle to an opened device driver.
Description
5.1.1.1.1 DRV_CLIENT_STATUS Enumeration
C
typedef enum {
DRV_CLIENT_STATUS_ERROR_EXTENDED = -10,
DRV_CLIENT_STATUS_ERROR = -1,
DRV_CLIENT_STATUS_CLOSED = 0,
DRV_CLIENT_STATUS_BUSY = 1,
DRV_CLIENT_STATUS_READY = 2,
DRV_CLIENT_STATUS_READY_EXTENDED = 10
} DRV_CLIENT_STATUS;
Description
Driver Client Status
This enumeration identifies the current status/state of a client's link to a driver.
Members
Members Description
DRV_CLIENT_STATUS_ERROR_EXTENDED
= -10
Indicates that a non-system defined error has occurred.
DRV_CLIENT_STATUS_ERROR = -1 An un-specified error has occurred.
DRV_CLIENT_STATUS_CLOSED = 0 An operation is currently in progress
DRV_CLIENT_STATUS_BUSY = 1 An operation is currently in progress
DRV_CLIENT_STATUS_READY = 2 Any previous operations have succeeded and the module is ready for
additional operations
DRV_CLIENT_STATUS_READY_EXTENDED
= 10
Indicates that the module is in a non-system defined ready/run state.
Remarks
The enumeration used as the return type for the client-level status routines defined by each device driver or system module (for
example, DRV_USART_ClientStatus) must be based on the values in this enumeration.
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5.1.1.1.2 DRV_HANDLE Type
C
typedef uintptr_t DRV_HANDLE;
Description
Device Handle
This handle identifies the open instance of a device driver. It must be passed to all other driver routines (except the initialization,
deinitialization, or power routines) to identify the caller.
Remarks
Every application or module that wants to use a driver must first call the driver's open routine. This is the only routine that is
absolutely required for every driver.
If a driver is unable to allow an additional module to use it, it must then return the special value DRV_HANDLE_INVALID. Callers
should check the handle returned for this value to ensure this value was not returned before attempting to call any other driver
routines using the handle.
5.1.1.1.3 DRV_IO_BUFFER_TYPES Enumeration
C
typedef enum {
DRV_IO_BUFFER_TYPE_NONE = 0x00,
DRV_IO_BUFFER_TYPE_READ = 0x01,
DRV_IO_BUFFER_TYPE_WRITE = 0x02,
DRV_IO_BUFFER_TYPE_RW = DRV_IO_BUFFER_TYPE_READ|DRV_IO_BUFFER_TYPE_WRITE
} DRV_IO_BUFFER_TYPES;
Description
Device Driver IO Buffer Identifier
This enumeration identifies to which buffer (read, write, both, or neither) a device operation will apply. This is used for "flush" (or
similar) operations.
Members
Members Description
DRV_IO_BUFFER_TYPE_NONE = 0x00 Operation does not apply to any buffer
DRV_IO_BUFFER_TYPE_READ = 0x01 Operation applies to read buffer
DRV_IO_BUFFER_TYPE_WRITE = 0x02 Operation applies to write buffer
DRV_IO_BUFFER_TYPE_RW =
DRV_IO_BUFFER_TYPE_READ|DRV_IO_BUFFER_TYPE_WRITE
Operation applies to both read and write buffers
5.1.1.1.4 DRV_IO_INTENT Enumeration
C
typedef enum {
DRV_IO_INTENT_READ,
DRV_IO_INTENT_WRITE,
DRV_IO_INTENT_READWRITE,
DRV_IO_INTENT_BLOCKING,
DRV_IO_INTENT_NONBLOCKING,
DRV_IO_INTENT_EXCLUSIVE,
DRV_IO_INTENT_SHARED
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} DRV_IO_INTENT;
Description
Device Driver I/O Intent
This enumeration identifies the intended usage of the device when the caller opens the device. It identifies the desired behavior
of the device driver for the following:
• Blocking or non-blocking I/O behavior (do I/O calls such as read and write block until the operation is finished or do they return
immediately and require the caller to call another routine to check the status of the operation)
• Support reading and/or writing of data from/to the device
• Identify the buffering behavior (sometimes called "double buffering" of the driver. Indicates if the driver should maintain its own
read/write buffers and copy data to/from these buffers to/from the caller's buffers.
• Identify the DMA behavior of the peripheral
Members
Members Description
DRV_IO_INTENT_READ Read
DRV_IO_INTENT_WRITE Write
DRV_IO_INTENT_READWRITE Read and Write
DRV_IO_INTENT_BLOCKING The driver will block and will return when the operation is complete
DRV_IO_INTENT_NONBLOCKING The driver will return immediately
DRV_IO_INTENT_EXCLUSIVE The driver will support only one client at a time
DRV_IO_INTENT_SHARED The driver will support multiple clients at a time
Remarks
The buffer allocation method is not identified by this enumeration. Buffers can be allocated statically at build time, dynamically at
run-time, or even allocated by the caller and passed to the driver for its own usage if a driver-specific routine is provided for such.
This choice is left to the design of the individual driver and is considered part of its interface.
These values can be considered "flags". One selection from each of the groups below can be ORed together to create the
complete value passed to the driver's open routine.
5.1.1.2 Constants
Macros
Name Description
DRV_CONFIG_NOT_SUPPORTED Not supported configuration.
DRV_HANDLE_INVALID Invalid device handle.
DRV_IO_ISBLOCKING Returns if the I/O intent provided is blocking
DRV_IO_ISEXCLUSIVE Returns if the I/O intent provided is non-blocking.
DRV_IO_ISNONBLOCKING Returns if the I/O intent provided is non-blocking.
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Description
5.1.1.2.1 DRV_CONFIG_NOT_SUPPORTED Macro
C
#define DRV_CONFIG_NOT_SUPPORTED (((unsigned short) -1))
Description
Not supported configuration
If the configuration option is not supported on an instance of the peripheral, use this macro to equate to that configuration. This
option should be listed as a possible value in the description of that configuration option.
5.1.1.2.2 DRV_HANDLE_INVALID Macro
C
#define DRV_HANDLE_INVALID (((DRV_HANDLE) -1))
Description
Invalid Device Handle
If a driver is unable to allow an additional module to use it, it must then return the special value DRV_HANDLE_INVALID. Callers
should check the handle returned for this value to ensure this value was not returned before attempting to call any other driver
routines using the handle.
Remarks
None.
5.1.1.2.3 DRV_IO_ISBLOCKING Macro
C
#define DRV_IO_ISBLOCKING(intent) (intent & DRV_IO_INTENT_BLOCKING)
Description
Device Driver Blocking Status Macro
This macro returns if the I/O intent provided is blocking.
Remarks
None.
5.1.1.2.4 DRV_IO_ISEXCLUSIVE Macro
C
#define DRV_IO_ISEXCLUSIVE(intent) (intent & DRV_IO_INTENT_EXCLUSIVE)
Description
Device Driver Exclusive Status Macro
This macro returns if the I/O intent provided is non-blocking.
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Remarks
None.
5.1.1.2.5 DRV_IO_ISNONBLOCKING Macro
C
#define DRV_IO_ISNONBLOCKING(intent) (intent & DRV_IO_INTENT_NONBLOCKING )
Description
Device Driver Non Blocking Status Macro
This macro returns if the I/ intent provided is non-blocking.
Remarks
None.
5.1.1.3 Files
Files
Name Description
driver.h This file aggregates all of the driver library interface headers.
driver_common.h This file defines the common macros and definitions used by the driver definition
and implementation headers.
Description
5.1.1.3.1 driver.h
Driver Library Interface Header
This file aggregates all of the driver library interface headers so client code only needs to include this one single header to obtain
prototypes and definitions for the interfaces to all driver libraries.
A device driver provides a simple well-defined interface to a hardware peripheral that can be used without operating system
support or that can be easily ported to a variety of operating systems.
A driver has the fundamental responsibilities:
• Providing a highly-abstraced interface to a peripheral
• Controlling access to a peripheral
• Managing the state of a peripheral
Remarks
The directory in which this file resides should be added to the compiler's search path for header files.
File Name
drv.h
Company
Microchip Technology Inc.
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5.1.1.3.2 driver_common.h
Driver Common Header
This file defines the common macros and definitions used by the driver definition and the implementation header.
Remarks
The directory in which this file resides should be added to the compiler's search path for header files.
Enumerations
Name Description
DRV_CLIENT_STATUS Identifies the current status/state of a client's connection to a driver.
DRV_IO_BUFFER_TYPES Identifies to which buffer a device operation will apply.
DRV_IO_INTENT Identifies the intended usage of the device when it is opened.
Macros
Name Description
DRV_CONFIG_NOT_SUPPORTED Not supported configuration.
DRV_HANDLE_INVALID Invalid device handle.
DRV_IO_ISBLOCKING Returns if the I/O intent provided is blocking
DRV_IO_ISEXCLUSIVE Returns if the I/O intent provided is non-blocking.
DRV_IO_ISNONBLOCKING Returns if the I/O intent provided is non-blocking.
Types
Name Description
DRV_HANDLE Handle to an opened device driver.
File Name
drv_common.h
Company
Microchip Technology Inc.
5.1.2 ADC Driver Library
5.1.2.1 Introduction
ADC Driver for Microchip Microcontrollers
This Analog-to-Digital Converter (ADC) driver provides an interface to manage the ADC module on the Microchip family of
microcontrollers.
Description
Overview
An ADC is a vital part of any system that interfaces to real-world signals. While there are many techniques for analog-to-digital
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conversion, the Microchip family of microcontrollers uses Successive Approximation as one of its primary techniques.
5.1.2.2 Release Notes
MPLAB Harmony Version: v0.70b ADC Driver Library Version : 0.02a Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.1.2.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.2.4 Using the Library
This topic describes the basic architecture of the ADC Driver Library and provides information and examples on how to use it.
Interface Header File: drv_adc.h
The interface to the ADC Driver Library is defined in the "drv_adc.h" header file.
Please refer to the MPLAB Harmony Overview for how the driver interacts with the framework.
5.1.2.4.1 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The following table lists the interface section and its brief description.
Section Description
Configuring the Library Provides macros for configuring the system. It is required that the system
configures the driver to build correctly by choosing appropriate configuration
options as listed in this section.
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System Interaction Functions Provides system module interfaces, Device initialization, deinitialization,
reinitialization and status functions.
Client Core Configuration Functions Provides interfaces for core functionality of the driver.
5.1.2.4.2 Abstraction Model
The ADC driver is modeled using the abstraction model, as shown in the following diagram.
• DRV_ADC_InputsRegister allows selection of inputs
• DRV_ADC_SamplesRead and DRV_ADC_SamplesReadLatest allow reading of the sample from the result buffer
• DRV_ADC_Start and DRV_ADC_Stop will control the operation of the ADC
5.1.2.4.3 How the Library Works
The library provides interfaces to support:
• System Interaction
• Client Core Functionality
5.1.2.4.3.1 System Initialization
This section describes the system initialization and reinitialization settings for the ADC Peripheral Library.
Description
System Initialization and Reinitialization
The system initialization and the reinitialization settings, effect only the instance of the peripheral that is being initialized or
re-initialized. During system initialization configure each instance of the module with the following configuration settings that are
supported by the specific ADC device hardware (refer to DRV_ADC_INIT)
1. Device requested power state: One of the system module power states.
2. Acquisition time: If the hardware supports this feature, configure this variable from DRV_ADC_ACQUISITION_TIME.
3. Voltage reference: If the hardware supports this feature, select the one from the available options(from
DRV_ADC_VOLTAGE_REFERENCE).
4. Conversion clock: If the hardware supports this feature, select the conversion clock prescaler value (from
DRV_ADC_CONVERSION_CLOCK_PRESCALER).
5. Conversion clock source: If the hardware supports this feature, select the conversion clock prescaler value (from
DRV_ADC_CONVERSION_CLOCK_SOURCE).
6. Clock frequency: Peripheral clock frequency configured for the device.
7. Conversion trigger source: If the hardware supports this feature, select the conversion trigger source(from
DRV_ADC_CONVERSION_TRIGGER_SOURCE).
8. Samples per interrupt: Configure the number of samples before to be generating interrupt(from
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DRV_ADC_SAMPLES_PER_INTERRUPT).
9. Output data format: Select the output data format.
10. Interrupt source: Select the interrupt source.
Example: Auto Sampling Mode
#define MY_ADC_INSTANCE DRV_ADC_INDEX_0
SYS_MODULE_OBJ myAdcObj;
DRV_ADC_INIT adcInitData;
SYS_STATUS adcStatus;
// Populate the adcInitData structure
adcInitData.plibModuleId = ADC_ID_1;
adcInitData.acquisitionTime = PLIB_ADC_ACQUISITION_TIME_20_TAD;
adcInitData.voltageReference = PLIB_ADC_VREF_POS_TO_VDD_VREF_NEG_TO_VSS;
adcInitData.clockFrequency = 4000000; //4MHz
adcInitData.conversionClock = PLIB_ADC_CONV_CLOCK_20_TCY;
adcInitData.conversionClockSource = PLIB_ADC_CLOCK_SRC_SYSTEM_CLOCK;
adcInitData.conversionTriggerSource = PLIB_ADC_CONVERSION_TRIGGER_INTERNAL_COUNT;
adcInitData.dataOutputFormat = PLIB_ADC_OUTPUT_FORMAT_INTEGER_16BIT;
adcInitData.initFlags = DRV_ADC_AUTO_SAMPLING;
adcInitData.interruptSource= PLIB_INT_SOURCE_ADC_1;
adcInitData.samplesPerInterrupt = PLIB_ADC_SAMPLE_PER_INTERRUPT_AT_EACH_SAMPLE;
myAdcObj = DRV_ADC_Initialize(MY_ADC_INSTANCE, (SYS_MODULE_INIT*)&adcInitData);
adcStatus = DRV_ADC_Status(myAdcObj);
if (SYS_STATUS_BUSY == adcStatus)
{
// do something else and check back later
}
else if (SYS_STATUS_ERROR >= adcStatus)
{
// Handle error
}
5.1.2.4.3.2 Client Core Functionality
Core functionality provides a basic interface for the driver operation.
Description
General Client Operation
Core functionality provides a basic interface for the driver operation.
Applications using the timer core functionality, need to perform the following:
1. The system should have completed necessary initialization and DRV_ADC_Tasks should either be running in a polled
environment, or in an interrupt environment.
2. Open the driver using DRV_ADC_Open (the timer driver supports exclusive access only).
3. Registers the inputs to be used by the clients using DRV_ADC_InputsRegister.
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4. Start the driver using DRV_ADC_Start.
5. Poll for the elapse status using DRV_ADC_SamplesAvailable, and then read the samples using either
DRV_ADC_SamplesReadLatest or DRV_ADC_SamplesRead.
6. The client will be able to stop the started ADC instance using DRV_ADC_Stop at any point and will be able to close it using
DRV_ADC_Close when it is no longer required.
Example:
DRV_HANDLE adcHandle; //Handle returned by DRV_ADC_Open function.
uint16_t dataBuffer; //Buffer to which the data will be written.
/*
Open a new client. The handle returned by the this function should be used
a passing parameter for all the specific client related operations.
*/
adcHandle = DRV_ADC_Open(MY_ADC_INSTANCE, DRV_IO_INTENT_NONBLOCKING);
DRV_ADC_InputsRegister ( adcHandle ,PLIB_ADC_INPUT_AN1|PLIB_ADC_INPUT_AN2 );
/*
ADC is not yet enabled. Enable it once the inputset is registered. Starts automatically
since auto sample mode is enabled.
*/
DRV_ADC_Start(adcHandle);
if ( DRV_ADC_SamplesAvailable(adcHandle) )
{
DRV_ADC_SamplesReadLatest ( adcHandle, &dataBuffer, 1);
/*
Once the above function returns success, the data is
in 'dataBuffer'. Application can use this data.
*/
}
5.1.2.4.3.3 Code Examples
Example1
//PIC32/PIC24 in auto sampling , Polling mode
#define MY_ADC_INSTANCE DRV_ADC_INDEX_0
DRV_HANDLE adcHandle; //Handle returned by DRV_ADC_Open function.
uint16_t dataBuffer; //Buffer to which the data will be written.
/*
Open a new client. The handle returned by the this function should be used
a passing parameter for all the specific client related operations.
*/
adcHandle = DRV_ADC_Open(MY_ADC_INSTANCE, DRV_IO_INTENT_NONBLOCKING);
ipHandle = DRV_ADC_InputsRegister ( adcHandle ,inputSetConfig );
/*
ADC is not yet enabled. Enable it once the inputset is registered. Starts automatically
since auto sample mode is enabled.
*/
DRV_ADC_Start(adcHandle);
while (DRV_ADC_SampleAvailable(adcHandle))
{
DRV_ADC_InputSetRead ( adcHandle, &dataBuffer, 1);
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/*
Once the above function returns success, the data is
in 'dataBuffer'. Application can use this data.
*/
}
Example 2:
//PIC32/PIC24 in Manual triggering , Polling mode
#define MY_ADC_INSTANCE DRV_ADC_INDEX_0
int main()
{
SYS_MODULE_OBJ myAdcObj; //Object returned by DRV_ADC_Initialize function.
DRV_ADC_INIT adcInitData; //Contains all the initialization values.
DRV_HANDLE adcHandle; //Handle returned by DRV_ADC_Open function.
DRV_ADC_INPUTSET_HANDLE ipHandle; //Handle returned by DRV_ADC_InputSetRegister
function.
DRV_ADC_INPUTSET_CONFIG inputSetConfig;//Contains all values to configure the inputset.
uint16_t dataBuffer; //Buffer to which the data will be written.
/*
These initialization values should be based on the requirement of the
application and the way it wants the hardware to be operating. Most of
these values will be written directly to the hardware registers.
*/
adcInitData.plibModuleId = ADC_ID_1;
adcInitData.acquisitionTime = PLIB_ADC_ACQUISITION_TIME_15_TAD;
adcInitData.voltageReference = PLIB_ADC_VREF_POS_TO_VDD_VREF_NEG_TO_VSS;
adcInitData.clockFrequency = 4000000; //4MHz
adcInitData.conversionClock = PLIB_ADC_CONV_CLOCK_5_TCY;
adcInitData.conversionClockSource = PLIB_ADC_CLOCK_SRC_INTERNAL_RC;
adcInitData.conversionTriggerSource = PLIB_ADC_CONVERSION_TRIGGER_INTERNAL_COUNT;
adcInitData.dataOutputFormat = PLIB_ADC_OUTPUT_FORMAT_INTEGER_16BIT;
adcInitData.interruptSource= PLIB_INT_SOURCE_ADC_1;
adcInitData.samplesPerInterrupt = PLIB_ADC_SAMPLE_PER_INTERRUPT_AT_EACH_SAMPLE;
myAdcObj = DRV_ADC_Initialize(MY_ADC_INSTANCE, (SYS_MODULE_INIT*)&adcInitData);
/*
Open a new client. The handle returned by the this function should be used
a passing parameter for all the specific client related operations.
*/
adcHandle = DRV_ADC_Open(MY_ADC_INSTANCE, DRV_IO_INTENT_NONBLOCKING);
/*
Driver invokes the registered callback function every successful data read.
Application can perform an action or do a state change in the callback
*/
inputSetConfig.callback = adcCallback;
inputSetConfig.input = POTENTIOMETER_ANALOG_INPUT;
inputSetConfig.errorTolerance = 10;
inputSetConfig.samplingFrequency = 40000;
ipHandle = DRV_ADC_InputSetRegister ( adcHandle ,inputSetConfig );
/*
ADC is not yet enabled. Enable it once the inputset is registered. Starts automatically
since auto sample mode is enabled.
*/
DRV_ADC_Start(adcHandle);
while (1)
{
/*
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This function can be either called in a sequential way or it could
be called from a timer periodically
*/
triggerAdc();
DRV_HANDLE handle;
DRV_ADC_Tasks (myAdcObj);
DRV_ADC_InputSetRead ( adcHandle, &dataBuffer, 1);
/*
Once the above function returns success, the data is
in 'dataBuffer'. Application can use this data.
*/
}
}
void adcCallback (void)
{
// Application can do something here
}
void triggerAdc(void)
{
DRV_ADC_OperationSetup(handle, DRV_ADC_START_SAMPLING);
/* Give some delay between the two operations. */
for (i=0; i<100; i++);
DRV_ADC_OperationSetup(handle, DRV_ADC_START_CONVERSION);
}
Example 3:
//PIC32/PIC24 in auto sampling , Interrupt mode
#define MY_ADC_INSTANCE DRV_ADC_INDEX_0
int main()
{
SYS_MODULE_OBJ myAdcObj; //Object returned by DRV_ADC_Initialize function.
DRV_ADC_INIT adcInitData; //Contains all the initialization values.
DRV_HANDLE adcHandle; //Handle returned by DRV_ADC_Open function.
DRV_ADC_INPUTSET_HANDLE ipHandle; //Handle returned by DRV_ADC_InputSetRegister
function.
DRV_ADC_INPUTSET_CONFIG inputSetConfig;//Contains all values to configure the inputset.
uint16_t dataBuffer; //Buffer to which the data will be written.
/*
These initialization values should be based on the requirement of the
application and the way it wants the hardware to be operating. Most of
these values will be written directly to the hardware registers.
*/
adcInitData.plibModuleId = ADC_ID_1;
adcInitData.acquisitionTime = PLIB_ADC_ACQUISITION_TIME_15_TAD;
adcInitData.voltageReference = PLIB_ADC_VREF_POS_TO_VDD_VREF_NEG_TO_VSS;
adcInitData.clockFrequency = 4000000; //4MHz
adcInitData.conversionClock = PLIB_ADC_CONV_CLOCK_5_TCY;
adcInitData.conversionClockSource = PLIB_ADC_CLOCK_SRC_INTERNAL_RC;
adcInitData.conversionTriggerSource = PLIB_ADC_CONVERSION_TRIGGER_INTERNAL_COUNT;
adcInitData.dataOutputFormat = PLIB_ADC_OUTPUT_FORMAT_INTEGER_16BIT;
adcInitData.initFlags = DRV_ADC_AUTO_SAMPLING;
adcInitData.interruptSource= PLIB_INT_SOURCE_ADC_1;
adcInitData.samplesPerInterrupt = PLIB_ADC_SAMPLE_PER_INTERRUPT_AT_EACH_SAMPLE;
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myAdcObj = DRV_ADC_Initialize(MY_ADC_INSTANCE, (SYS_MODULE_INIT*)&adcInitData);
/*
Open a new client. The handle returned by the this function should be used
a passing parameter for all the specific client related operations.
*/
adcHandle = DRV_ADC_Open(MY_ADC_INSTANCE, DRV_IO_INTENT_NONBLOCKING);
/*
Driver invokes the registered callback function every successful data read.
Application can perform an action or do a state change in the callback
*/
inputSetConfig.callback = adcCallback;
inputSetConfig.input = POTENTIOMETER_ANALOG_INPUT;
inputSetConfig.errorTolerance = 10;
inputSetConfig.samplingFrequency = 40000;
ipHandle = DRV_ADC_InputSetRegister ( adcHandle ,inputSetConfig );
/*
ADC is not yet enabled. Enable it once the inputset is registered. Starts automatically
since auto sample mode is enabled.
*/
DRV_ADC_Start(adcHandle);
while (1)
{
/*
Task function need not be called. Task function
is registered as ISR in case of interrpt mode
*/
DRV_ADC_InputSetRead ( adcHandle, &dataBuffer, 1);
/*
Once the above function returns success, the data is
in 'dataBuffer'. Application can use this data.
*/
}
}
void adcCallback (void)
{
// Application can do something here
}
// Do something else...
} while(total < MY_BUFFER_SIZE);
Example 4:
//PIC32/PIC24 in Manual triggering , Interrupt mode
#define MY_ADC_INSTANCE DRV_ADC_INDEX_0
int main()
{
SYS_MODULE_OBJ myAdcObj; //Object returned by DRV_ADC_Initialize function.
DRV_ADC_INIT adcInitData; //Contains all the initialization values.
DRV_HANDLE adcHandle; //Handle returned by DRV_ADC_Open function.
DRV_ADC_INPUTSET_HANDLE ipHandle; //Handle returned by DRV_ADC_InputSetRegister
function.
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DRV_ADC_INPUTSET_CONFIG inputSetConfig;//Contains all values to configure the inputset.
uint16_t dataBuffer; //Buffer to which the data will be written.
/*
These initialization values should be based on the requirement of the
application and the way it wants the hardware to be operating. Most of
these values will be written directly to the hardware registers.
*/
adcInitData.plibModuleId = ADC_ID_1;
adcInitData.acquisitionTime = PLIB_ADC_ACQUISITION_TIME_15_TAD;
adcInitData.voltageReference = PLIB_ADC_VREF_POS_TO_VDD_VREF_NEG_TO_VSS;
adcInitData.clockFrequency = 4000000; //4MHz
adcInitData.conversionClock = PLIB_ADC_CONV_CLOCK_5_TCY;
adcInitData.conversionClockSource = PLIB_ADC_CLOCK_SRC_INTERNAL_RC;
adcInitData.conversionTriggerSource = PLIB_ADC_CONVERSION_TRIGGER_INTERNAL_COUNT;
adcInitData.dataOutputFormat = PLIB_ADC_OUTPUT_FORMAT_INTEGER_16BIT;
adcInitData.interruptSource= PLIB_INT_SOURCE_ADC_1;
adcInitData.samplesPerInterrupt = PLIB_ADC_SAMPLE_PER_INTERRUPT_AT_EACH_SAMPLE;
myAdcObj = DRV_ADC_Initialize(MY_ADC_INSTANCE, (SYS_MODULE_INIT*)&adcInitData);
/*
Open a new client. The handle returned by the this function should be used
a passing parameter for all the specific client related operations.
*/
adcHandle = DRV_ADC_Open(MY_ADC_INSTANCE, DRV_IO_INTENT_NONBLOCKING);
/*
Driver invokes the registered callback function every successful data read.
Application can perform an action or do a state change in the callback
*/
inputSetConfig.callback = adcCallback;
inputSetConfig.input = POTENTIOMETER_ANALOG_INPUT;
inputSetConfig.errorTolerance = 10;
inputSetConfig.samplingFrequency = 40000;
ipHandle = DRV_ADC_InputSetRegister ( adcHandle ,inputSetConfig );
/*
ADC is not yet enabled. Enable it once the inputset is registered. Starts automatically
since auto sample mode is enabled.
*/
DRV_ADC_Start(adcHandle);
while (1)
{
/*
This function can be either called in a sequential way or it could
be called from a timer periodically
*/
triggerAdc();
/*
Task function need not be called. Task function
is registered as ISR in case of interrpt mode
*/
DRV_ADC_InputSetRead ( adcHandle, &dataBuffer, 1);
/*
Once the above function returns success, the data is
in 'dataBuffer'. Application can use this data.
*/
}
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}
void adcCallback (void)
{
// Application can do something here
}
void triggerAdc(void)
{
DRV_ADC_OperationSetup(handle, DRV_ADC_START_SAMPLING);
/* Give some delay between the two operations. */
for (i=0; i<100; i++);
DRV_ADC_OperationSetup(handle, DRV_ADC_START_CONVERSION);
}
5.1.2.5 Configuring the Library
The configuration of the ADC device driver is based on the file sys_config.h
This header file contains the configuration selection for the ADC device driver build. Based on the selections made here and the
system setup the ADC device driver will support or not selected features. These configuration settings will apply to all instances
of the device driver.
This header can be placed anywhere in the application specific folders and the path of this header needs to be presented to the
include search for a successful build. Refer to the Applications Overview section for more details.
5.1.2.6 Building the Library
Files
Name Description
drv_adc.c ADC Driver source file.
drv_adc_client_multi.c ADC Driver multiple client implementations.
drv_adc_client_single.c ADC Driver single client implementations.
drv_adc_hw_dynamic.c ADC Driver build variant implementation for the dynamic driver.
drv_adc_hw_static.c ADC Driver build variant implementation for the static driver.
Description
5.1.2.6.1 drv_adc.c
ADC Driver Source File
This file implements the ADC Driver Interface routines. While building the driver from source, ALWAYS use this file in the build.
File Name
drv_adc.c
Company
Microchip Technology Inc.
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5.1.2.6.2 drv_adc_client_multi.c
ADC Driver Multiple Client
This file implements the functions for the multiple client support. While building the driver from source, use this file in the build
when DRV_ADC_CLIENTS_NUMBER is defined in the system configuration or when DRV_ADC_INSTANCES_NUMBER is
defined in the system configuration.
File Name
drv_adc_client_multi.c
Company
Microchip Technology Inc.
5.1.2.6.3 drv_adc_client_single.c
ADC Driver Single Client
This file implements the functions for the single client support While building the driver from source, use this file in the build when
DRV_ADC_CLIENTS_NUMBER is not defined in system configuration.
File Name
drv_adc_client_single.c
Company
Microchip Technology Inc.
5.1.2.6.4 drv_adc_hw_dynamic.c
ADC Driver Build Variant implementation for dynamic driver
This file defines the build variant implementations for the dynamic driver. While building the driver from source, use this file in the
build when DRV_ADC_INSTANCES_NUMBER is defined in the system configuration.
File Name
drv_adc_hw_dynamic.c
Company
Microchip Technology Inc.
5.1.2.6.5 drv_adc_hw_static.c
ADC Driver build variant implementation for static driver
This file defines the build variant implementations for the static driver. While building the driver from source, use this file in the
build when DRV_ADC_INSTANCES_NUMBER is not defined in the system configuration.
File Name
drv_adc_hw_static.c
Company
Microchip Technology Inc.
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5.1.2.7 Library Interface
Data Types and Constants
Name Description
DRV_ADC_CLIENT_STATUS Defines the client-specific status of the ADC driver.
DRV_ADC_INIT Defines the data required to initialize or reinitialize the
ADC driver.
DRV_ADC_INIT_FLAGS Identifies the initialization flags of the ADC module.
DRV_ADC_ACQUISITION_TIME Defines the acquisition time.
DRV_ADC_ALTERNATE_INPUT_SAMPLING_ENABLE Enable the alternate input sampling feature of the ADC.
DRV_ADC_ANALOG_INPUT Defines the analog input channel.
DRV_ADC_AUTO_SAMPLING_ENABLE Rnable the suto-sampling feature of the ADC.
DRV_ADC_CLIENTS_NUMBER Selects the miximum number of clients.
DRV_ADC_CONVERSION_CLOCK_PRESCALER Defines the conversion clock.
DRV_ADC_CONVERSION_CLOCK_SOURCE Defines the conversion clock source.
DRV_ADC_CONVERSION_TRIGGER_SOURCE Defines the conversion trigger source.
DRV_ADC_INDEX ADC static index selection.
DRV_ADC_INDEX_0 ADC driver index definitions.
DRV_ADC_INDEX_1 This is macro DRV_ADC_INDEX_1.
DRV_ADC_INDEX_2 This is macro DRV_ADC_INDEX_2.
DRV_ADC_INDEX_COUNT Number of valid ADC driver indices.
DRV_ADC_INSTANCES_NUMBER Sets up the maximum number of hardware instances that
can be supported.
DRV_ADC_INTERNAL_BUFFER_SIZE Define the internal buffer size.
DRV_ADC_INTERRUPT_MODE Controls operation of the driver in the interrupt or polled
mode.
DRV_ADC_INTERRUPT_SOURCE Defines the interrupt source of the static driver.
DRV_ADC_PERIPHERAL_ID ADC PLIB ID Selection
DRV_ADC_POWER_STATE Controls the power state of the ADC.
DRV_ADC_RESULT_FORMAT Defines the data output format.
DRV_ADC_SAMPLES_PER_INTERRUPT Define the sample per interrupt.
DRV_ADC_STOP_ON_CONVERSION_ENABLE Enable the stop on conversion feature of the ADC.
DRV_ADC_VOLTAGE_REFERENCE Defines the voltage reference.
Client Core Configuration Functions
Name Description
DRV_ADC_ClientStatus Gets the current client-specific status the ADC driver.
DRV_ADC_Close Closes an opened-instance of the ADC driver.
DRV_ADC_InputsRegister Registers an input set with the driver for sampling.
DRV_ADC_Open Opens the specified ADC driver instance and returns a handle to it.
DRV_ADC_SamplesAvailable Identifies if any the ADC driver has any samples available to read.
DRV_ADC_Start Starts the ADC driver sampling and converting analog to digital values.
DRV_ADC_Stop Stops the ADC driver from sampling and converting analog to digital values.
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Other Functions
Name Description
DRV_ADC_SampleMaxGet Gets the max sample value.
DRV_ADC_SampleMinGet Gets the min sample value.
DRV_ADC_SamplesRead Reads the converted sample data from the ADC driver.
DRV_ADC_SamplesReadLatest Reads the most recently converted sample data from the ADC driver.
System Interaction Functions
Name Description
DRV_ADC_Deinitialize Deinitializes the specified instance of the ADC driver module.
DRV_ADC_Initialize Initializes the ADC driver.
DRV_ADC_Reinitialize Reinitializes the ADC instance for the specified module ID.
DRV_ADC_Status Provides the current status of the ADC driver module.
DRV_ADC_Tasks Maintains the driver's state machine and implements its ISR.
Description
5.1.2.7.1 System Interaction Functions
5.1.2.7.1.1 DRV_ADC_Deinitialize Function
C
void DRV_ADC_Deinitialize(
SYS_MODULE_OBJ object
);
Description
This function deinitializes the specified instance of the ADC driver module, disabling its operation (and any hardware).
Invalidates all the internal data.
Preconditions
The DRV_ADC_Initialize function should have been called before calling this function.
Parameters
Parameters Description
object Driver object handle, returned from DRV_ADC_Initialize
Returns
None.
Remarks
Once the Initialize operation has been called, the Deinitialize operation must be called before the Initialize operation can be
called again.
This function will NEVER block waiting for hardware. If the operation requires time to allow the hardware to complete, this will be
reported by the DRV_ADC_Status operation. The system has to use DRV_ADC_Status to find out when the module is in the
ready state.
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Example
SYS_MODULE_OBJ object; // Returned from DRV_ADC_Initialize
SYS_STATUS status;
DRV_ADC_Deinitialize(object);
status = DRV_ADC_Status(object);
if (SYS_MODULE_DEINITIALIZED == status)
{
// Check again later if you need to know
// when the driver is deinitialized.
}
5.1.2.7.1.2 DRV_ADC_Initialize Function
C
SYS_MODULE_OBJ DRV_ADC_Initialize(
const SYS_MODULE_INDEX drvIndex,
const SYS_MODULE_INIT * const init
);
Description
This function initializes the ADC driver, making it ready for clients to open and use it.
Preconditions
None.
Parameters
Parameters Description
drvIndex Index for the driver instance to be initialized
init Pointer to a data structure containing any data necessary to initialize the driver.
This pointer may be null if no data is required because static overrides have been
provided.
Returns
If successful, returns a valid handle to a driver instance object. Otherwise, it returns SYS_MODULE_OBJ_INVALID.
Remarks
This function must be called before any other ADC function is called.
This function should only be called once during system initialization unless DRV_ADC_Deinitialize is called to deinitialize the
driver instance.
This function will NEVER block for hardware access. If the operation requires time to allow the hardware to re-initialize, it will be
reported by the DRV_ADC_Status operation. The system must use DRV_ADC_Status to find out when the driver is in the ready
state.
Build configuration options may be used to staticaly override options in the "init" sructure and will take precedance over
initialization data passed using this function.
Example
DRV_ADC_INIT init;
SYS_MODULE_OBJ objectHandle;
// Populate the init structure
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.adcID = ADC_ID_1;
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init.initFlags = DRV_ADC_AUTO_SAMPLING;
init.clockFrequency = 4000000; // 4MHz
init.acquisitionTime = ADC_ACQUISITION_TIME_15_TAD;
init.voltageReference = ADC_VREF_POS_TO_VDD_VREF_NEG_TO_VSS;
init.conversionClockPrescaler = ADC_CONV_CLOCK_5_TCY;
init.conversionClockSource = ADC_CLOCK_SRC_INTERNAL_RC;
init.conversionTriggerSource = ADC_CONVERSION_TRIGGER_INTERNAL_COUNT;
init.samplesPerInterrupt = ADC_SAMPLE_PER_INTERRUPT_AT_EACH_SAMPLE;
init.resultFormat = ADC_RESULT_FORMAT_INTEGER_16BIT;
init.analogInput = ADC_INPUT_AN2
init.interruptSource = INT_SOURCE_ADC_1;
// Initialize the ADC driver
objectHandle = DRV_ADC_Initialize(DRV_ADC_INDEX_0, (SYS_MODULE_INIT*)&init);
if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
5.1.2.7.1.3 DRV_ADC_Reinitialize Function
C
void DRV_ADC_Reinitialize(
SYS_MODULE_OBJ object,
const SYS_MODULE_INIT * const init
);
Description
This function reinitializes and refreshes the hardware for the index instance of the ADC module using the hardware initialization
given data. It does not clear or reinitialize internal data structures (although it may change the value of a few appropriate data
items necessary to manage the new hardware state).
Preconditions
The DRV_ADC_Initialize function should have been called before calling this function.
Parameters
Parameters Description
object Driver object handle, returned from the DRV_ADC_Initialize
Returns
None.
Example
DRV_ADC_INIT init;
SYS_MODULE_OBJ objectHandle; // Returned from DRV_ADC_Initialize
SYS_STATUS adcStatus;
// Populate the init structure
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.adcID = ADC_ID_1;
init.initFlags = DRV_ADC_AUTO_SAMPLING;
init.clockFrequency = 4000000; // 4MHz
init.acquisitionTime = ADC_ACQUISITION_TIME_15_TAD;
init.voltageReference = ADC_VREF_POS_TO_VDD_VREF_NEG_TO_VSS;
init.conversionClockPrescaler = ADC_CONV_CLOCK_5_TCY;
init.conversionClockSource = ADC_CLOCK_SRC_INTERNAL_RC;
init.conversionTriggerSource = ADC_CONVERSION_TRIGGER_INTERNAL_COUNT;
init.samplesPerInterrupt = ADC_SAMPLE_PER_INTERRUPT_AT_EACH_SAMPLE;
init.resultFormat = ADC_RESULT_FORMAT_INTEGER_16BIT;
init.analogInput = ADC_INPUT_AN2
init.interruptSource = INT_SOURCE_ADC_1;
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// Reinitialize the ADC driver
DRV_ADC_Reinitialize(objectHandle, (SYS_MODULE_INIT*)&init);
// Check the status of the driver
adcStatus = DRV_ADC_Status(myAdcObj);
if (SYS_STATUS_BUSY == adcStatus)
{
// do something else and check back later
}
else if (SYS_STATUS_ERROR >= adcStatus)
{
// Handle error
}
Remarks: This function can be called multiple times to reinitialize the module.
This operation can be used to refresh any supported hardware registers as
specified by the initialization data or to change the power state of the
module.
This function will NEVER block for hardware access. If the operation requires
time to allow the hardware to reinitialize, it will be reported by the
DRV_ADC_Status operation. The system must use DRV_ADC_Status to find out
when the driver is in the ready state.
Build configuration options may be used to staticaly override options in the
"init" sructure and will take precedance over initialization data passed
using this function.
5.1.2.7.1.4 DRV_ADC_Status Function
C
SYS_STATUS DRV_ADC_Status(
SYS_MODULE_OBJ object
);
Description
This function provides the current status of the ADC driver module.
Preconditions
The DRV_ADC_Initialize function must have been called before calling this function.
Parameters
Parameters Description
object Driver object handle, returned from the DRV_ADC_Initialize
Returns
SYS_STATUS_READY - Indicates that the driver is busy with a previous system level operation and cannot start another
Remarks
Any value greater than SYS_STATUS_READY is also a normal running state in which the driver is ready to accept new
operations.
SYS_STATUS_BUSY - Indicates that the driver is busy with a previous system level operation and cannot start another
SYS_STATUS_ERROR - Indicates that the driver is in an error state
Any value less than SYS_STATUS_ERROR is also an error state.
SYS_MODULE_DEINITIALIZED - Indicates that the driver has been deinitialized
This value is less than SYS_STATUS_ERROR
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The this operation can be used to determine when any of the driver's module level operations has completed.
If the status operation returns SYS_STATUS_BUSY, the a previous operation has not yet completed. Once the status operation
returns SYS_STATUS_READY, any previous operations have completed.
The value of SYS_STATUS_ERROR is negative (-1). Any value less than that is also an error state.
This function will NEVER block waiting for hardware.
If the Status operation returns an error value, the error may be cleared by calling the reinitialize operation. If that fails, the
deinitialize operation will need to be called, followed by the initialize operation to return to normal operations.
Example
SYS_MODULE_OBJ object; // Returned from DRV_TMR_Initialize
SYS_STATUS status;
status = DRV_ADC_Status(object);
else if (SYS_STATUS_ERROR >= status)
{
// Handle error
}
5.1.2.7.1.5 DRV_ADC_Tasks Function
C
void DRV_ADC_Tasks(
SYS_MODULE_OBJ object
);
Description
This function is used to maintain the driver's internal state machine and implement its ISR for interrupt-driven implementations.
Preconditions
The DRV_ADC_Initialize function must have been called for the specified ADC driver instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from DRV_ADC_Initialize)
Returns
None
Remarks
This function is normally not called directly by an application. It is called by the system's Tasks function (SYS_Tasks) or by the
apropriate raw ISR.
This function may excute in an ISR context and will never block or access any resources that may cause it to block.
Example
SYS_MODULE_OBJ object; // Returned from DRV_ADC_Initialize
while (true)
{
DRV_ADC_Tasks (object);
// Do other tasks
}
5.1.2.7.2 Client Core Configuration Functions
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5.1.2.7.2.1 DRV_ADC_ClientStatus Function
C
DRV_ADC_CLIENT_STATUS DRV_ADC_ClientStatus(
DRV_HANDLE handle
);
Description
This function gets the client-specfic status of the ADC driver associated with the given handle.
Preconditions
The DRV_ADC_Initialize function must have been called.
DRV_ADC_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open function
Returns
A DRV_ADC_CLIENT_STATUS value describing the current status of the driver.
Remarks
This function will not block for hardware access and will immediately return the current status.
Example
DRV_HANDLE handle; // Returned from DRV_ADC_Open
DRV_ADC_CLIENT_STATUS status;
status = DRV_ADC_ClientStatus(handle);
if(DRV_ADC_CLIENT_STATUS_ERROR >= status)
{
// Handle the error
}
5.1.2.7.2.2 DRV_ADC_Close Function
C
void DRV_ADC_Close(
DRV_HANDLE handle
);
Description
This function closes an opened-instance of the ADC driver, invalidating the handle.
Preconditions
The DRV_ADC_Initialize function must have been called for the specified ADC driver instance.
DRV_ADC_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open function
Returns
None
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Remarks
After calling this function, the handle passed in "handle" must not be used with any of the remaining driver functions. A new
handle must be obtained by calling DRV_ADC_Open before the caller may use the driver again.
If DRV_IO_INTENT_BLOCKING was requested and the driver was built appropriately to support blocking behavior call may
block until the operation is complete.
If DRV_IO_INTENT_NON_BLOCKING request the driver client can call the DRV_ADC_Status operation to find out when the
module is in the ready state (the handle is no longer valid).
Usually there is no need for the driver client to verify that the Close operation has completed.
Example
DRV_HANDLE handle; // Returned from DRV_ADC_Open
DRV_ADC_Close(handle);
5.1.2.7.2.3 DRV_ADC_InputsRegister Function
C
void DRV_ADC_InputsRegister(
DRV_HANDLE handle,
uint32_t inputsMask
);
Description
This function registers an input set with the driver for sampling.
Preconditions
The DRV_ADC_Initialize function must have been called for the specified ADC device instance and the DRV_ADC_Status must
have returned SYS_STATUS_READY.
DRV_ADC_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open function
inputsMask Mask bits recognising the various Analog Channels
Returns
None.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_ADC_Open
DRV_ADC_InputsRegister (handle, ADC_INPUT_AN2|ADC_INPUT_AN3);
5.1.2.7.2.4 DRV_ADC_Open Function
C
DRV_HANDLE DRV_ADC_Open(
const SYS_MODULE_INDEX drvIndex,
const DRV_IO_INTENT intent
);
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Description
This function opens the specified ADC driver instance and provides a handle that must be provided to all other client-level
operations to identify the caller and the instance of the driver.
Preconditions
The DRV_ADC_Initialize function must have been called before calling this function.
Parameters
Parameters Description
drvIndex Identifier for the object instance to be opened
intent Zero or more of the values from the enumeration DRV_IO_INTENT "ORed"
together to indicate the intended use of the driver
Returns
If successful, the function returns a valid open-instance handle (a number identifying both the caller and the module instance).
If an error occurs, the return value is DRV_HANDLE_INVALID.
Remarks
The handle returned is valid until the DRV_ADC_Close function is called.
This function will NEVER block waiting for hardware.
If the DRV_IO_INTENT_BLOCKING is requested and the driver was built appropriately to support blocking behavior, other
client-level operations may block waiting on hardware until they are complete.
If DRV_IO_INTENT_NON_BLOCKING is requested the driver client can call the DRV_ADC_ClientStatus operation to find out
when the module is in the ready state.
If the requested intent flags are not supported, the function will return DRV_HANDLE_INVALID.
Example
DRV_HANDLE handle;
handle = DRV_ADC_Open(DRV_ADC_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if (DRV_HANDLE_INVALID == handle)
{
// Unable to open the driver
}
5.1.2.7.2.5 DRV_ADC_SamplesAvailable Function
C
bool DRV_ADC_SamplesAvailable(
DRV_HANDLE handle
);
Description
This function identifies if any the ADC driver has any samples available to read.
Preconditions
The DRV_ADC_Initialize function must have been called.
DRV_ADC_Open must have been called to obtain a valid opened device handle.
The desired analog input set must have been selected by calling DRV_ADC_InputsRegister.
DRV_ADC_Start must have been called to start the driver sampling and converting analog input samples to digital values.
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Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open function
Returns
• true - If one or more samples are available for the registered input set
• false - If no samples are available
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_ADC_Open
DRV_ADC_SAMPLE buffer;
// An input set must have been registered and the ADC started.
if (DRV_ADC_SamplesAvailable(handle))
{
DRV_ADC_SamplesRead(handle, &buffer, sizeof(buffer));
}
5.1.2.7.2.6 DRV_ADC_Start Function
C
void DRV_ADC_Start(
DRV_HANDLE handle
);
Description
This function starts the ADC driver sampling the selected analog inputs and converting the samples to digital values.
Preconditions
The DRV_ADC_Initialize function must have been called.
DRV_ADC_Open must have been called to obtain a valid opened device handle.
The desired analog input set must have been selected by calling DRV_ADC_InputsRegister.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open function
Returns
None.
Remarks
Call DRV_ADC_SamplesAvailable to find out when one or more samples is available.
Example
DRV_HANDLE handle; // Returned from DRV_ADC_Open
// Use DRV_ADC_InputsRegister to register the desired inputs.
DRV_ADC_Start(handle);
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5.1.2.7.2.7 DRV_ADC_Stop Function
C
void DRV_ADC_Stop(
DRV_HANDLE handle
);
Description
This function stops the ADC driver from sampling analog inputs and converting the samples to digital values.
Preconditions
The DRV_ADC_Initialize function must have been called.
DRV_ADC_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open function
Returns
None.
Remarks
Call DRV_ADC_Start to restart sampling and conversion of analog inputs to digital values.
Example
DRV_HANDLE handle; // Returned from DRV_ADC_Open
DRV_ADC_Stop(handle);
5.1.2.7.3 Other Functions
5.1.2.7.3.1 DRV_ADC_SampleMaxGet Function
C
ADC_SAMPLE DRV_ADC_SampleMaxGet(
DRV_HANDLE handle
);
Description
This function returns the max sample value.
Preconditions
The DRV_ADC_Initialize function must have been called.
DRV_ADC_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open function
Returns
Max sample value.
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Remarks
None
Example
DRV_HANDLE handle; // Returned from DRV_ADC_Open
ADC_SAMPLE maxValue, minValue;
maxValue = DRV_ADC_SampleMaxGet(handle);
minValue = DRV_ADC_SampleMinGet(handle);
adcRange = maxValue - minValue;
5.1.2.7.3.2 DRV_ADC_SampleMinGet Function
C
ADC_SAMPLE DRV_ADC_SampleMinGet(
DRV_HANDLE handle
);
Description
This function returns the min sample value.
Preconditions
The DRV_ADC_Initialize function must have been called.
DRV_ADC_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open function
Returns
Min sample value.
Remarks
None
Example
DRV_HANDLE handle; // Returned from DRV_ADC_Open
ADC_SAMPLE maxValue, minValue;
maxValue = DRV_ADC_SampleMaxGet(handle);
minValue = DRV_ADC_SampleMinGet(handle);
adcRange = maxValue - minValue;
5.1.2.7.3.3 DRV_ADC_SamplesRead Function
C
unsigned short DRV_ADC_SamplesRead(
DRV_HANDLE handle,
ADC_SAMPLE * buffer,
unsigned short bufferSize
);
Description
This function reads converted sample data from the ADC driver into the given buffer. How many samples depends on how many
samples are available and on the relative sizes of the samples and the buffer passed in.
Zero (0) samples are copied if the bufferSize is less than the size of a complete set of samples for the registered inputs.
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N sets of samples where the bufferSize / size of a complete set of samples = N, unless less than N samples are currently
available. Then, the number of samples currently available are copied.
Preconditions
The DRV_ADC_Initialize function must have been called.
DRV_ADC_Open must have been called to obtain a valid opened device handle.
The desired analog input set must have been selected by calling DRV_ADC_InputsRegister.
DRV_ADC_Start must have been called to start the driver sampling and converting analog input samples to digital values.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open function
buffer A pointer to the buffer to where the sample data will be copied
bufferSize Size of the buffer (in bytes)
Returns
Number of bytes of sample data copied to the specified buffer.
Remarks
The DRV_ADC_SamplesAvailable function can be used to determine if any sample data is available.
Calling this function removes the samples from the driver's internal buffer queue of samples.
Example
DRV_HANDLE handle; // Returned from DRV_ADC_Open
ADC_SAMPLE buffer;
// An input set must have been registered and the ADC started.
if (DRV_ADC_SamplesAvailable(handle))
{
DRV_ADC_SamplesRead(handle, &buffer, sizeof(buffer));
}
5.1.2.7.3.4 DRV_ADC_SamplesReadLatest Function
C
unsigned short DRV_ADC_SamplesReadLatest(
DRV_HANDLE handle,
ADC_SAMPLE * buffer,
unsigned short bufferSize
);
Description
This function reads only the most recenly converted sample data from the ADC driver into the given buffer. Only the data for a
single set of samples for the registerd inputs is copied to the caller's buffer. If the buffer size is less than the size of a complete
set of samples for the registerd inputs, no data is copied to the caller's buffer. Also, no sample data is copied to the caller's buffer
if no sample data is currently available.
Preconditions
The DRV_ADC_Initialize function must have been called.
DRV_ADC_Open must have been called to obtain a valid opened device handle.
The desired analog input set must have been selected by calling DRV_ADC_InputsRegister.
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DRV_ADC_Start must have been called to start the driver sampling and converting analog input samples to digital values.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open function
buffer A pointer to the buffer to where the sample data will be copied
bufferSize Size of the buffer (in bytes)
Returns
Number of bytes of sample data copied to the specified buffer.
Remarks
The DRV_ADC_SamplesAvailable function can be used to determine if any sample data is available.
This function does not remove any data from the driver's internal buffer queue of sample data.
Example
DRV_HANDLE handle; // Returned from DRV_ADC_Open
ADC_SAMPLE buffer;
// An input set must have been registered and the ADC started.
if (DRV_ADC_SamplesAvailable(handle))
{
DRV_ADC_SamplesReadLatest(handle, &buffer, sizeof(buffer));
}
5.1.2.7.4 Data Types and Constants
5.1.2.7.4.1 DRV_ADC_CLIENT_STATUS Enumeration
C
typedef enum {
DRV_ADC_CLIENT_STATUS_STARTED,
DRV_ADC_CLIENT_STATUS_STOPPED,
DRV_ADC_CLIENT_STATUS_READY,
DRV_ADC_CLIENT_STATUS_BUSY,
DRV_ADC_CLIENT_STATUS_INVALID,
DRV_ADC_CLIENT_STATUS_OVERFLOW,
DRV_ADC_CLIENT_STATUS_BUFFER_TOO_SMALL
} DRV_ADC_CLIENT_STATUS;
Description
ADC Client Status
This enumeration defines the client-specific status codes of the ADC driver.
Members
Members Description
DRV_ADC_CLIENT_STATUS_STARTED ADC Started
DRV_ADC_CLIENT_STATUS_STOPPED stopped on error
DRV_ADC_CLIENT_STATUS_READY Driver OK, ready for client operations
DRV_ADC_CLIENT_STATUS_BUSY An operation is currently in progress
DRV_ADC_CLIENT_STATUS_INVALID Client in an invalid (or un-opened) state
DRV_ADC_CLIENT_STATUS_OVERFLOW Driver Overflowed
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DRV_ADC_CLIENT_STATUS_BUFFER_TOO_SMALL Input Set Read Buffer Too Small
Remarks
Returned by the DRV_ADC_ClientStatus function.
5.1.2.7.4.2 DRV_ADC_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
ADC_MODULE_ID adcId;
DRV_ADC_INIT_FLAGS initFlags;
uint32_t clockFrequency;
ADC_ACQUISITION_TIME acquisitionTime;
ADC_VOLTAGE_REFERENCE voltageReference;
ADC_CONVERSION_CLOCK conversionClockPrescaler;
ADC_CLOCK_SOURCE conversionClockSource;
ADC_CONVERSION_TRIGGER_SOURCE conversionTriggerSource;
ADC_SAMPLES_PER_INTERRUPT samplesPerInterrupt;
ADC_RESULT_FORMAT resultFormat;
ADC_INPUTS_POSITIVE analogInput;
INT_SOURCE interruptSource;
} DRV_ADC_INIT;
Description
ADC Driver Initialization Data
This structure defines the data required to initialize or reinitialize the ADC driver.
Members
Members Description
SYS_MODULE_INIT moduleInit; System module initialization
ADC_MODULE_ID adcId; Identifies timer hardware module (PLIB-level) ID
DRV_ADC_INIT_FLAGS initFlags; Initialization Flags
uint32_t clockFrequency; Clock Frequency
ADC_ACQUISITION_TIME acquisitionTime; Acquisition Time
ADC_VOLTAGE_REFERENCE
voltageReference;
Voltage Reference Selection
ADC_CONVERSION_CLOCK
conversionClockPrescaler;
Clock Setup for the Conversion
ADC_CLOCK_SOURCE
conversionClockSource;
Clock Source for Conversion
ADC_CONVERSION_TRIGGER_SOURCE
conversionTriggerSource;
Conversion Trigger Source
ADC_SAMPLES_PER_INTERRUPT
samplesPerInterrupt;
Samples Per Interrupt valid values = 0- 15
ADC_RESULT_FORMAT resultFormat; Result Format
ADC_INPUTS_POSITIVE analogInput; Input Channel to convert
INT_SOURCE interruptSource; Interrupt Source for the module
Remarks
Not all init features are available for all devices. Refer to the specific data sheet to determine availability.
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5.1.2.7.4.3 DRV_ADC_INIT_FLAGS Enumeration
C
typedef enum {
DRV_ADC_STOP_CONVERSION_ON_INTERRUPT,
DRV_ADC_ALTERNATE_INPUT_SAMPLING,
DRV_ADC_AUTO_SAMPLING,
DRV_ADC_MANUAL_SAMPLING
} DRV_ADC_INIT_FLAGS;
Description
ADC Initialization Flags
This data type identifies the initialization flags of the ADC module.
Members
Members Description
DRV_ADC_STOP_CONVERSION_ON_INTERRUPT Stops the conversion on the interrupt
DRV_ADC_ALTERNATE_INPUT_SAMPLING Alternate Input Sampling
DRV_ADC_AUTO_SAMPLING Begin sampling automaticaly after previous conversion
DRV_ADC_MANUAL_SAMPLING Manual Sampling
Remarks
Not all modes are available on all devices. Refer to the specific data sheet to determine availability.
5.1.2.7.4.4 DRV_ADC_ACQUISITION_TIME Macro
C
#define DRV_ADC_ACQUISITION_TIME ADC_ACQUISITION_TIME_4_TAD
Description
ADC Acquisition Time
This macro defines the acquistition time of the ADC driver. This provides static override of the dynamic selection of the
acquisition time. If this macro is defined, this will be used for setting up the acquisition time and not the acquisition time value
provided by DRV_ADC_INIT.
Remarks
None.
5.1.2.7.4.5 DRV_ADC_ALTERNATE_INPUT_SAMPLING_ENABLE Macro
C
#define DRV_ADC_ALTERNATE_INPUT_SAMPLING_ENABLE false
Description
ADC Alternate Input Sampling Enable
This macro enables the alternate input sampling feature of the ADC. This macro can take the following values:
• true - Enables the alternate Input sampling feature of the ADC
• false - Disables the alternate Input sampling feature of the ADC
• DRV_CONFIG_NOT_SUPPORTED - When the feature is not supported on the instance
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Remarks
None.
5.1.2.7.4.6 DRV_ADC_ANALOG_INPUT Macro
C
#define DRV_ADC_ANALOG_INPUT ADC_INPUT_AN2
Description
ADC Analog input channel
This macro defines the analog input channel for the ADC driver. This provides static override of the dynamic selection of the
analog input. If this macro is defined, this will be used for setting up the analog input and not the analog input value provided by
DRV_ADC_INIT.
Remarks
None.
5.1.2.7.4.7 DRV_ADC_AUTO_SAMPLING_ENABLE Macro
C
#define DRV_ADC_AUTO_SAMPLING_ENABLE true
Description
ADC Auto Sampling Enable
This macro enables the auto-sampling feature of the ADC. This macro can take the following values:
• true - Enables the auto-sampling feature of the ADC
• false - Disables the auto-sampling feature of the ADC
• DRV_CONFIG_NOT_SUPPORTED - When the feature is not supported on the instance
Remarks
None.
5.1.2.7.4.8 DRV_ADC_CLIENTS_NUMBER Macro
C
#define DRV_ADC_CLIENTS_NUMBER 1
Description
ADC Maximum Number of Clients
This definition selectd the maximum number of clients that the ADC driver can support at run time.
Remarks
None.
5.1.2.7.4.9 DRV_ADC_CONVERSION_CLOCK_PRESCALER Macro
C
#define DRV_ADC_CONVERSION_CLOCK_PRESCALER ADC_CONV_CLOCK_4_TCY
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Description
ADC Conversion Clock
This macro defines the conversion clock for the ADC driver. This provides static override of the dynamic selection of the
conversion clock. If this macro is defined, this will be used for setting up the conversion clock and not the conversion clock value
provided by DRV_ADC_INIT.
Remarks
None.
5.1.2.7.4.10 DRV_ADC_CONVERSION_CLOCK_SOURCE Macro
C
#define DRV_ADC_CONVERSION_CLOCK_SOURCE ADC_CLOCK_SRC_SYSTEM_CLOCK
Description
ADC Conversion Clock Source
This macro defines the conversion clock source for the ADC driver. This provides static override of the dynamic selection of the
conversion clock source. If this macro is defined, this will be used for setting up the conversion clock source and not the
conversion clock source value provided by DRV_ADC_INIT.
Remarks
None.
5.1.2.7.4.11 DRV_ADC_CONVERSION_TRIGGER_SOURCE Macro
C
#define DRV_ADC_CONVERSION_TRIGGER_SOURCE ADC_CONVERSION_TRIGGER_INTERNAL_COUNT
Description
Conversion Trigger Source
This macro defines the conversion trigger source for the ADC driver. This provides static override of the dynamic selection of the
conversion trigger source. If this macro is defined, this will be used for setting up the conversion trigger source and not the
conversion trigger source value provided by DRV_ADC_INIT.
Remarks
None.
5.1.2.7.4.12 DRV_ADC_INDEX Macro
C
#define DRV_ADC_INDEX DRV_ADC_INDEX_0
Description
ADC Static Index Selection
ADC static index selection for the driver object reference.
Remarks
This index is required to make a reference to the driver object.
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5.1.2.7.4.13 DRV_ADC_INDEX_0 Macro
C
#define DRV_ADC_INDEX_0 0
Description
Driver ADC Module Index Numbers
These constants provide ADC driver index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals.
These values should be passed into the DRV_ADC_Initialize function to identify the driver instance in use.
5.1.2.7.4.14 DRV_ADC_INDEX_1 Macro
C
#define DRV_ADC_INDEX_1 1
Description
This is macro DRV_ADC_INDEX_1.
5.1.2.7.4.15 DRV_ADC_INDEX_2 Macro
C
#define DRV_ADC_INDEX_2 2
Description
This is macro DRV_ADC_INDEX_2.
5.1.2.7.4.16 DRV_ADC_INDEX_COUNT Macro
C
#define DRV_ADC_INDEX_COUNT _ADC_EXISTS
Description
Driver ADC Driver Module Index Count
This constant identifies ADC driver index definitions.
Remarks
This constant should be used in place of hard-coded numeric literals.
This value is device-specific.
5.1.2.7.4.17 DRV_ADC_INSTANCES_NUMBER Macro
C
#define DRV_ADC_INSTANCES_NUMBER 1
Description
ADC hardware instance configuration
This macro sets up the maximum number of hardware instances that can be supported.
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Remarks
None.
5.1.2.7.4.18 DRV_ADC_INTERNAL_BUFFER_SIZE Macro
C
#define DRV_ADC_INTERNAL_BUFFER_SIZE 2
Description
ADC Internal buffer size
This macro defines the internal buffer size.
Remarks
None.
5.1.2.7.4.19 DRV_ADC_INTERRUPT_MODE Macro
C
#define DRV_ADC_INTERRUPT_MODE true
Description
ADC Interrupt And Polled Mode Operation Control
This macro controls the operation of the driver in the interrupt mode of operation. The possible values of this macro are:
• true - Select if interrupt mode of adc operation is desired
• false - Select if polling mode of adc operation is desired
Not defining this option to true or false will result in a build error.
Remarks
None.
5.1.2.7.4.20 DRV_ADC_INTERRUPT_SOURCE Macro
C
#define DRV_ADC_INTERRUPT_SOURCE PLIB_INT_SOURCE_ADC_1
Description
ADC Interrupt Source
Macro to define the interrupt source of the static driver.
Remarks
Refer to the Interrupt Peripheral Library document for more information on the PLIB_INT_SOURCE enumeration.
5.1.2.7.4.21 DRV_ADC_PERIPHERAL_ID Macro
C
#define DRV_ADC_PERIPHERAL_ID ADC_ID_1
Description
ADC PLIB ID Selection
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This macro selects the ADC PLIB ID Selection. This is an intialization override of the adcID member of the intialization
configuration.
Remarks
None.
5.1.2.7.4.22 DRV_ADC_POWER_STATE Macro
C
#define DRV_ADC_POWER_STATE SYS_MODULE_POWER_IDLE_STOP
Description
ADC power state configuration
This macro controls the power state of the ADC.
Remarks
This feature may not be available in the device or the ADC module selected.
5.1.2.7.4.23 DRV_ADC_RESULT_FORMAT Macro
C
#define DRV_ADC_RESULT_FORMAT ADC_RESULT_FORMAT_INTEGER_16BIT
Description
ADC Data Output Format
This macro defines the data output format for the ADC driver. This provides static override of the dynamic selection of the data
output format. If this macro is defined, this will be used for setting up the data output format and not the data output format value
provided by DRV_ADC_INIT.
Remarks
None.
5.1.2.7.4.24 DRV_ADC_SAMPLES_PER_INTERRUPT Macro
C
#define DRV_ADC_SAMPLES_PER_INTERRUPT 2
Description
Samples per Interrupt
This macro defines the samples per interrupt of the ADC driver. This provides static override of the dynamic selection of the
sample per interrupt. If this macro is defined, this will be used for setting up the samples per interrupt and not the samples per
interrupt value provided by DRV_ADC_INIT.
Remarks
Select this size based on the device available and the number of samples that are required to form a set.
5.1.2.7.4.25 DRV_ADC_STOP_ON_CONVERSION_ENABLE Macro
C
#define DRV_ADC_STOP_ON_CONVERSION_ENABLE false
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Description
ADC Stop on conversion Enable
This macro enables the stop on conversion feature of the ADC. This macro can take the following values:
• true - Enables the ADC to stop on conversion
• false - Disables the ADC to stop on conversion
• DRV_CONFIG_NOT_SUPPORTED - When the feature is not supported on the instance
Remarks
None.
5.1.2.7.4.26 DRV_ADC_VOLTAGE_REFERENCE Macro
C
#define DRV_ADC_VOLTAGE_REFERENCE ADC_VREF_POS_TO_VDD_VREF_NEG_TO_VSS
Description
ADC Voltage Reference
This macro defines the voltage reference of the ADC driver. This provides static override of the dynamic selection of the voltage
reference. If this macro is defined, this will be used for setting up the voltage reference and not the voltage reference value
provided by DRV_ADC_INIT.
Remarks
None.
5.1.2.8 Files
Files
Name Description
drv_adc.h ADC Driver interface definition.
Description
5.1.2.8.1 drv_adc.h
ADC Driver Interface Definition
The ADC device driver provides a simple interface to manage the ADC modules on Microchip microcontrollers. This file defines
the interface definition for the ADC driver.
Enumerations
Name Description
DRV_ADC_CLIENT_STATUS Defines the client-specific status of the ADC driver.
DRV_ADC_INIT_FLAGS Identifies the initialization flags of the ADC module.
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Functions
Name Description
DRV_ADC_ClientStatus Gets the current client-specific status the ADC driver.
DRV_ADC_Close Closes an opened-instance of the ADC driver.
DRV_ADC_Deinitialize Deinitializes the specified instance of the ADC driver module.
DRV_ADC_Initialize Initializes the ADC driver.
DRV_ADC_InputsRegister Registers an input set with the driver for sampling.
DRV_ADC_Open Opens the specified ADC driver instance and returns a handle to it.
DRV_ADC_Reinitialize Reinitializes the ADC instance for the specified module ID.
DRV_ADC_SampleMaxGet Gets the max sample value.
DRV_ADC_SampleMinGet Gets the min sample value.
DRV_ADC_SamplesAvailable Identifies if any the ADC driver has any samples available to read.
DRV_ADC_SamplesRead Reads the converted sample data from the ADC driver.
DRV_ADC_SamplesReadLatest Reads the most recently converted sample data from the ADC driver.
DRV_ADC_Start Starts the ADC driver sampling and converting analog to digital values.
DRV_ADC_Status Provides the current status of the ADC driver module.
DRV_ADC_Stop Stops the ADC driver from sampling and converting analog to digital values.
DRV_ADC_Tasks Maintains the driver's state machine and implements its ISR.
Macros
Name Description
DRV_ADC_INDEX_0 ADC driver index definitions.
DRV_ADC_INDEX_1 This is macro DRV_ADC_INDEX_1.
DRV_ADC_INDEX_2 This is macro DRV_ADC_INDEX_2.
DRV_ADC_INDEX_COUNT Number of valid ADC driver indices.
Structures
Name Description
DRV_ADC_INIT Defines the data required to initialize or reinitialize the ADC driver.
File Name
drv_adc.h
Company
Microchip Technology Inc.
5.1.3 Ethernet MAC Driver Library
5.1.3.1 Introduction
Ethernet (Media Access) Controller Driver Library
for
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Microchip Microcontrollers
This library provides a driver-level abstraction of the on-chip Ethernet Controller found on many PIC32 devices.
The "Host-To-Network" layer of a TCP/IP stack organization covers the Data Link and Physical Layers of the standard OSI stack.
The Ethernet Controller provides the Data Link or Media Access Control Layer, in addition to other functions discussed below.
An external Ethernet "PHY" provides the Physical layer, providing conversion between the digital and analog.
Description
The PIC32 Ethernet Controller is a bus master module that interfaces with an off-chip PHY in order to implement a complete
Ethernet node in a system. The following are some of the key features of this module:
• Supports 10/100 Ethernet
• Full-Duplex and Half-Duplex operation
• Broadcast, Multicast and Unicast packets
• Manual and automatic flow control
• Supports Auto-MDIX enabled PHYs
• Reduced Media Independent Interface (RMII) and Media Independent Interface (MII) PHY data interfaces
• Performance statistics metrics in hardware.
• RAM descriptor based DMA operation for both receive and transmit path
• Fully configurable interrupts
• Configurable receive packet filtering using:
• 64-bit Hash Table
• 64-byte Pattern Match
• Magic Packet™Filtering
• Runt Packet Detection and Filtering
• Supports Packet Payload Checksum calculation
• CRC Check
Support for the Serial Management Interface (SMI) (also known as the MIIM interface) is provided by the Ethernet PHY Driver
Library.
5.1.3.2 Release Notes
MPLAB Harmony Version: v0.70b Ethernet MAC Library Version : 7.10 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.1.3.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
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licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.3.4 Using the Library
This topic describes the basic architecture of the Ethernet MAC Driver Library and provides information and examples on how to
use it.
Interface Header File: drv_ethmac.h
The interface to the Ethernet MAC library is defined in the "drv_ethmac.h" header file. This file is included by the "drv_ethmac.h"
file. Any C language source (.c) file that uses the Ethernet MAC Driver Library should include "drv.h".
Library File:
The Ethernet MAC Driver Library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the library interacts with the framework.
5.1.3.4.1 Abstraction Model
The Ethernet Controller provides the modules needed to implement a 10/100 Mbps Ethernet node using an external Ethernet
PHY chip. The PHY chip provides a digital-analog interface as part of the Physical Layer and the controller provides the Media
Access Controller (MAC) layer above the PHY.
As shown in Figure 1, the Ethernet Controller consists of the following modules:
• Media Access Control (MAC) block: Responsible for implementing the MAC functions of the Ethernet IEEE 802.3 Specification
• Flow Control (FC) block: Responsible for control of the transmission of PAUSE frames. (Reception of PAUSE frames is
handled within the MAC.)
• RX Filter (RXF) block: This module performs filtering on every receive packet to determine whether each packet should be
accepted or rejected
• TX DMA/TX Buffer Management Engine: The TX DMA and TX Buffer Management engines perform data transfers from the
memory (using descriptor tables) to the MAC Transmit Interface
• RX DMA/RX Buffer Management Engine: The RX DMA and RX Buffer Management engines transfer receive packets from the
MAC to the memory (using descriptor tables)
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Figure 1: Ethernet Controller Block Diagram
For completeness, we also need to look at the interface diagram of a representative Ethernet PHY. As shown in Figure 2, the
PHY has two interfaces, one for configuring and managing the PHY (SMI/MIIM) and another for transmit and receive data (RMII
or MII). The SMI/MIIM interface is the responsibility of the Ethernet PHY Driver Library. When setting up the Ethernet PHY this
library calls primitives from the Ethernet PHY Driver library. The RMII/MII interface is the responsibility of the Ethernet MAC
Driver Library (this library).
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Figure 2: Ethernet PHY Interfaces
5.1.3.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Ethernet MAC Driver Library.
Library Interface Section Description
Client Level Functions PIC32MACOpen, PIC32MACClose, and PIC32MACSetup to support the
TCP/IP Stack. Plus link status and power options.
Get and Put Functions Get/Put functions for bytes, byte arrays, and Ethernet headers.
Base Address and Buffer Size Functions Base address and sizes for buffers.
Receive Functions Receive routines.
Transmit Functions Transmit routines.
Events Ethernet event support routines.
Other Functions Checksum support, memory copying, version support.
Data Types and Constants Typedefs and #defines.
5.1.3.4.3 MPLAB Harmony vs. Unified Stack Functions
The following is a cross-reference linking MPLAB Harmony functions with functions from the legacy TCP/IP Stack:
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MPLAB Harmony Function: MCHP_tcpip_unified Function:
DRV_ETHMAC_BaseAddrTxGet
DRV_ETHMAC_RxPacketDiscard
DRV_ETHMAC_EventAck
DRV_ETHMAC_EventDeInit
DRV_ETHMAC_EventInit
DRV_ETHMAC_EventNotifyClear
DRV_ETHMAC_EventNotifyHandlerSet
DRV_ETHMAC_EventNotifySet
DRV_ETHMAC_EventPendingGet
DRV_ETHMAC_ByteArrayGet
DRV_ETHMAC_HeaderGet
DRV_ETHMAC_IPBufferChecksumCalc
DRV_ETHMAC_LinkCheck
DRV_ETHMAC_MemoryCopyIsDone
DRV_ETHMAC_PIC32MACClose
DRV_ETHMAC_PIC32MACOpen
DRV_ETHMAC_PIC32MACSetup
DRV_ETHMAC_PIC32MACTeardown
DRV_ETHMAC_PowerMode
DRV_ETHMAC_ByteArrayPut
DRV_ETHMAC_HeaderPut
DRV_ETHMAC_ReadPointerBaseSet
DRV_ETHMAC_ReadPointerSet
DRV_ETHMAC_RxChecksumCalc
DRV_ETHMAC_RxHashTableEntrySet
DRV_ETHMAC_RxReadPointerGet
DRV_ETHMAC_RxReadPointerSet
DRV_ETHMAC_TxBufferFlush
DRV_ETHMAC_TxIsReady
DRV_ETHMAC_VersionGet
DRV_ETHMAC_VersionStrGet
DRV_ETHMAC_WritePointerSet
PIC32MACGetTxBaseAddr
PIC32MACDiscardRx
PIC32MACEventAck
PIC32MACEventDeInit
PIC32MACEventInit
PIC32TCPIP_MAC_EventNotifyClear
PIC32MACEventSetNotifyHandler
PIC32MACEventSetNotifyEvents
PIC32MACEventGetPending
PIC32MACGetArray
PIC32MACGetHeader
PIC32MACCalcIPBufferChecksum
PIC32MACCheckLink
PIC32MACIsMemCopyDone
PIC32MACClose
PIC32MACOpen
PIC32MACInitialize
PIC32MACDeinitialize
PIC32MACPowerMode
PIC32MACPutArray
PIC32MACPutHeader
PIC32MACSetBaseReadPtr
PIC32MACSetReadPtr
PIC32MACCalcRxChecksum
PIC32MACSetRXHashTableEntry
PIC32MACGetReadPtrInRx
PIC32MACSetReadPtrInRx
PIC32MACFlush
PIC32MACIsTxReady
-none-
-nonePIC32MACSetWritePtr
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MCHP_tcpip_unified Function MPLAB Harmony Function:
PIC32MACCalcIPBufferChecksum
PIC32MACCalcRxChecksum
PIC32MACCheckLink
PIC32MACDeinitialize
PIC32MACDiscardRx
PIC32MACEventAck
PIC32MAC_EventNotifyClear
PIC32MACEventDeInit
PIC32MACEventGetPending
PIC32MACEventInit
PIC32MACEventSetNotifyEvents
PIC32MACEventSetNotifyHandler
PIC32MACFlush
PIC32MACGetArray
PIC32MACGetHeader
PIC32MACGetReadPtrInRx
PIC32MACGetTxBaseAddr
PIC32MACIsMemCopyDone
PIC32MACIsTxReady
PIC32MACDeinitialize
PIC32MACInitialize
PIC32MACOpen
PIC32MACClose
PIC32MACPowerMode
PIC32MACPutArray
PIC32MACPutHeader
PIC32MACSetBaseReadPtr
PIC32MACSetRXHashTableEntry
PIC32MACSetReadPtr
PIC32MACSetReadPtrInRx
PIC32MACSetWritePtr
DRV_ETHMAC_IPBufferChecksumCalc
DRV_ETHMAC_RxChecksumCalc
DRV_ETHMAC_LinkCheck
DRV_ETHMAC_PIC32MACTeardown
DRV_ETHMAC_RxPacketDiscard
DRV_ETHMAC_EventAck
DRV_ETHMAC_EventNotifyClear
DRV_ETHMAC_EventDeInit
DRV_ETHMAC_EventPendingGet
DRV_ETHMAC_EventInit
DRV_ETHMAC_EventNotifySet
DRV_ETHMAC_EventNotifyHandlerSet
DRV_ETHMAC_TxBufferFlush
DRV_ETHMAC_ByteArrayGet
DRV_ETHMAC_HeaderGet
DRV_ETHMAC_RxReadPointerGet
DRV_ETHMAC_BaseAddrTxGet
DRV_ETHMAC_MemoryCopyIsDone
DRV_ETHMAC_TxIsReady
DRV_ETHMAC_PIC32MACTeardown
DRV_ETHMAC_PIC32MACSetup
DRV_ETHMAC_PIC32MACOpen
DRV_ETHMAC_PIC32MACClose
DRV_ETHMAC_PowerMode
DRV_ETHMAC_ByteArrayPut
DRV_ETHMAC_HeaderPut
DRV_ETHMAC_ReadPointerBaseSet
DRV_ETHMAC_RxHashTableEntrySet
DRV_ETHMAC_ReadPointerSet
DRV_ETHMAC_RxReadPointerSet
DRV_ETHMAC_WritePointerSet
DRV_ETHMAC_VersionGet
DRV_ETHMAC_VersionStrGet
5.1.3.4.4 Support for Legacy "Ethernet Controller Library"
These routines (DRV_ETHMAC_Legacy*) provide MPLAB Harmony support for applications that use the "Ethernet Controller
Library for Microchip PIC32MX Microcontrollers" that is installed with XC32 compilers. (See
Microchip\xc32\v1.20\docs\pic32-lib-help\hlpETH.chm for information on this legacy support.)
For some functions the argument list is the same, but for others the addition of an index value from the ETH_MODULE_ID
enumeration has been added to make the function work from within the context of this MPLAB Harmony driver.
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Legacy Controller Library MPLAB Harmony
EthClose
EthDescriptorGetBuffer
EthDescriptorsPoolAdd
EthDescriptorsPoolCleanUp
EthDescriptorsPoolRemove
EthEventsClr
EthEventsEnableClr
EthEventsEnableGet
EthEventsEnableSet
EthEventsEnableWrite
EthEventsGet
EthInit
EthMACGetAddress
EthMACOpen
EthMACSetAddress
EthMACSetMaxFrame
EthRxAcknowledgeBuffer
EthRxAcknowledgePacket
EthRxBuffersAppend
EthRxFiltersClr
EthRxFiltersHTSet
EthRxFiltersPMClr
EthRxFiltersPMSet
EthRxFiltersSet
EthRxFiltersWrite
EthRxGetBuffer
EthRxGetPacket
EthRxSetBufferSize
EthStatRxAlgnErrCnt
EthStatRxFcsErrCnt
EthStatRxOkCnt
EthStatRxOvflCnt
EthStatTxMColCnt
EthStatTxOkCnt
EthStatTxSColCnt
EthTxAcknowledgeBuffer
EthTxAcknowledgePacket
EthTxGetBufferStatus
EthTxGetPacketStatus
EthTxSendBuffer
EthTxSendPacket
DRV_ETHMAC_LegacyClose
DRV_ETHMAC_LegacyDescriptorGetBuffer
DRV_ETHMAC_LegacyDescriptorsPoolAdd
DRV_ETHMAC_LegacyDescriptorsPoolCleanUp
DRV_ETHMAC_LegacyDescriptorsPoolRemove
PLIB_ETH_LegacyEventsClr
PLIB_ETH_LegacyEventsEnableClr
PLIB_ETH_LegacyEventsEnableGet
PLIB_ETH_LegacyEventsEnableSet
PLIB_ETH_LegacyEventsEnableWrite
PLIB_ETH_LegacyEventsGet
DRV_ETHMAC_LegacyInit
PLIB_ETH_LegacyMACGetAddress
DRV_ETHMAC_LegacyMACOpen
PLIB_ETH_LegacyMACSetAddress
PLIB_ETH_LegacyMACSetMaxFrame
DRV_ETHMAC_LegacyRxAcknowledgeBuffer
DRV_ETHMAC_LegacyRxAcknowledgePacket
DRV_ETHMAC_LegacyRxBuffersAppend
PLIB_ETH_LegacyRxFiltersClr
PLIB_ETH_LegacyRxFiltersHTSet
PLIB_ETH_LegacyRxFiltersPMClr
PLIB_ETH_LegacyRxFiltersPMSet
PLIB_ETH_LegacyRxFiltersSet
PLIB_ETH_LegacyRxFiltersWrite
DRV_ETHMAC_LegacyRxGetBuffer
DRV_ETHMAC_LegacyRxGetPacket
PLIB_ETH_LegacyRxSetBufferSize
PLIB_ETH_LegacyStatRxAlgnErrCnt
PLIB_ETH_LegacyStatRxFcsErrCnt
PLIB_ETH_LegacyStatRxOkCnt
PLIB_ETH_LegacyStatRxOvflCnt
PLIB_ETH_LegacyStatTxMColCnt
PLIB_ETH_LegacyStatTxOkCnt
PLIB_ETH_LegacyStatTxSColCnt
DRV_ETHMAC_LegacyTxAcknowledgeBuffer
DRV_ETHMAC_LegacyTxAcknowledgePacket
DRV_ETHMAC_LegacyTxGetBufferStatus
DRV_ETHMAC_LegacyTxGetPacketStatus
DRV_ETHMAC_LegacyTxSendBuffer
DRV_ETHMAC_LegacyTxSendPacket
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MAC Driver Function Legacy Controller Library
DRV_ETHMAC_LegacyClose
DRV_ETHMAC_LegacyDescriptorGetBuffer
DRV_ETHMAC_LegacyDescriptorsPoolAdd
DRV_ETHMAC_LegacyDescriptorsPoolCleanUp
DRV_ETHMAC_LegacyDescriptorsPoolRemove
DRV_ETHMAC_LegacyInit
DRV_ETHMAC_LegacyMACOpen
DRV_ETHMAC_LegacyRxAcknowledgeBuffer
DRV_ETHMAC_LegacyRxAcknowledgePacket
DRV_ETHMAC_LegacyRxBuffersAppend
DRV_ETHMAC_LegacyRxGetBuffer
DRV_ETHMAC_LegacyRxGetPacket
DRV_ETHMAC_LegacyTxAcknowledgeBuffer
DRV_ETHMAC_LegacyTxAcknowledgePacket
DRV_ETHMAC_LegacyTxGetBufferStatus
DRV_ETHMAC_LegacyTxGetPacketStatus
DRV_ETHMAC_LegacyTxSendBuffer
DRV_ETHMAC_LegacyTxSendPacket
EthClose
EthDescriptorGetBuffer
EthDescriptorsPoolAdd
EthDescriptorsPoolCleanUp
EthDescriptorsPoolRemove
EthInit
EthMACOpen
EthRxAcknowledgeBuffer
EthRxAcknowledgePacket
EthRxBuffersAppend
EthRxGetBuffer
EthRxGetPacket
EthTxAcknowledgeBuffer
EthTxAcknowledgePacket
EthTxGetBufferStatus
EthTxGetPacketStatus
EthTxSendBuffer
EthTxSendPacket
5.1.3.5 Configuring the Library
Macros
Name Description
DRV_ETHMAC_CLIENTS_NUMBER Selects the maximum number of clients.
DRV_ETHMAC_INDEX Ethernet MAC static index selection.
DRV_ETHMAC_INSTANCES_NUMBER Selects the maximum number of hardware instances that can be
supported by the dynamic driver.
DRV_ETHMAC_INTERRUPT_MODE Controls operation of the driver in the interrupt or polled mode.
DRV_ETHMAC_INTERRUPT_SOURCE Defines an override of the interrupt source in case of static driver.
DRV_ETHMAC_PERIPHERAL_ID Defines an override of the peripheral ID.
DRV_ETHMAC_POWER_STATE Defines an override of the power state of the Ethernet MAC driver.
Description
The configuration of the Ethernet MAC Driver is based on the file sys_config.h
This header file contains the configuration selection for the Ethernet MAC Driver. Based on the selections made, the Ethernet
MAC Driver will support or not support selected features. These configuration settings will apply to all instances of the Ethernet
MAC DRiver.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
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5.1.3.5.1 DRV_ETHMAC_CLIENTS_NUMBER Macro
C
#define DRV_ETHMAC_CLIENTS_NUMBER 1
Description
Ethernet MAC Maximum Number of Clients
This definition select the maximum number of clients that the Ethernet MAC driver can support at run time. Not defining it means
using a single client.
Remarks
None.
5.1.3.5.2 DRV_ETHMAC_INDEX Macro
C
#define DRV_ETHMAC_INDEX DRV_ETHMAC_INDEX_1
Description
Ethernet MAC Static Index Selection
This definition selects the Ethernet MAC static index for the driver object reference
Remarks
This index is required to make a reference to the driver object.
5.1.3.5.3 DRV_ETHMAC_INSTANCES_NUMBER Macro
C
#define DRV_ETHMAC_INSTANCES_NUMBER 1
Description
Ethernet MAC hardware instance configuration
This definition selects the maximum number of hardware instances that can be supported by the dynamic driver. Not defining it
means using a static driver.
Remarks
None.
5.1.3.5.4 DRV_ETHMAC_INTERRUPT_MODE Macro
C
#define DRV_ETHMAC_INTERRUPT_MODE true
Description
Ethernet MAC Interrupt And Polled Mode Operation Control
This macro controls the operation of the driver in the interrupt mode of operation. The possible values of this macro are:
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• true - Select if interrupt mode of timer operation is desired
• false - Select if polling mode of timer operation is desired
Not defining this option to true or false will result in a build error.
Remarks
None.
5.1.3.5.5 DRV_ETHMAC_INTERRUPT_SOURCE Macro
C
#define DRV_ETHMAC_INTERRUPT_SOURCE INT_SOURCE_ETH_1
Description
Ethernet MAC Interrupt Source
Defines an override of the interrupt source in case of static driver.
Remarks
Refer to the INT PLIB document for more information on INT_SOURCE enumeration.
5.1.3.5.6 DRV_ETHMAC_PERIPHERAL_ID Macro
C
#define DRV_ETHMAC_PERIPHERAL_ID ETHMAC_ID_1
Description
Ethernet MAC Peripheral ID Selection
Defines an override of the peripheral ID, using macros.
Remarks
Some devices also support ETHMAC_ID_0
5.1.3.5.7 DRV_ETHMAC_POWER_STATE Macro
C
#define DRV_ETHMAC_POWER_STATE SYS_MODULE_POWER_IDLE_STOP
Description
Ethernet MAC power state configuration
Defines an override of the power state of the Ethernet MAC driver.
Remarks
This feature may not be available in the device or the Ethernet MAC module selected.
5.1.3.6 Building the Library
This section list the files that are available in the \src of the Ethernet MAC Driver. It lists which files need to be included in the
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build based on either a hardware feature present on the board or configuration option selected by the system.
5.1.3.7 Library Interface
Data Types and Constants
Name Description
ETH_CLOSE_FLAGS Defines the possible disable codes of Ethernet controller
"DRV_ETHMAC_LegacyClose" call.
ETH_LINK_STATUS Defines the possible status flags of Ethernet link.
ETH_MODULE_STATUS Defines the possible status codes of the Ethernet controller.
ETH_OPEN_FLAGS Supported open configuration flags for the Ethernet module (EthMACOpen).
ETH_PAUSE_TYPE Defines the possible Ethernet MAC pause types.
ETH_RESULT_CODE Defines the possible results of Ethernet operations that can succeed or fail
ETHPHY_CONFIG_FLAGS flags for DRV_ETHPHY_Setup() call
DRV_ETHMAC_INDEX_1 This is macro DRV_ETHMAC_INDEX_1.
DRV_ETHPHY_INDEX_1 This is macro DRV_ETHPHY_INDEX_1.
Client Level Functions
Name Description
DRV_ETHMAC_PIC32MACClose Closes a client instance of the PIC32 MAC Driver.
DRV_ETHMAC_PIC32MACGetConfig Supports PIC32 Ethernet MAC by copying its configuration..
DRV_ETHMAC_PIC32MACLinkCheck Checks current link status.
DRV_ETHMAC_PIC32MACOpen Opens a client instance of the PIC32 MAC Driver.
DRV_ETHMAC_PIC32MACSetup Supports PIC32 Ethernet MAC setup.
DRV_ETHMAC_PIC32MACTeardown Supports PIC32 Ethernet MAC Teardown (opposite of setup).
Event Functions
Name Description
DRV_ETHMAC_PIC32MACEventAcknowledge This function acknowledges and re-enables processed events.
Multiple events can be orr-ed together as they are processed
together. The events acknowledged by this function should be the
events that have been retrieved from the stack by calling
DRV_ETHMAC_PIC32MACEventPendingGet() or have been
passed to the user by the stack using the notification handler
(PIC32MACEventSetNotifyHandler()) and have been processed
and have to be re-enabled.
DRV_ETHMAC_PIC32MACEventMaskSet Enables the MAC events.
DRV_ETHMAC_PIC32MACEventPendingGet Returns the currently pending events.
Other Functions
Name Description
DRV_ETHMAC_PIC32MACPowerMode Powers down the Ethernet MAC.
DRV_ETHMAC_PIC32MACProcess MAC periodic processing function.
Receive Functions
Name Description
DRV_ETHMAC_PIC32MACPacketRx A packet is returned if such a pending packet exists.
DRV_ETHMAC_PIC32MACPacketTx A packet is submitted to the MAC driver for transmission.
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Transmit Functions
Name Description
DRV_ETHMAC_PIC32MACRxFilterHashTableEntrySet Calculates a CRC-32 and sets the approriate bit in the
ETHHTx registers
Description
5.1.3.7.1 Client Level Functions
5.1.3.7.1.1 DRV_ETHMAC_PIC32MACClose Function
C
TCPIP_MAC_RES DRV_ETHMAC_PIC32MACClose(
TCPIP_MAC_HANDLE hMac
);
Description
This function closes a client instance of the PIC32 MAC Driver.
Preconditions
DRV_ETHMAC_PIC32MACOpen should have been called.
Parameters
Parameters Description
macId MAC idenfification, from the TCPIP_STACK_MODULE enumeration
Returns
TCPIP_MAC_RES_OK if initialization completed; otherwise, the error enumeration value.
Example
5.1.3.7.1.2 DRV_ETHMAC_PIC32MACGetConfig Function
C
size_t DRV_ETHMAC_PIC32MACGetConfig(
TCPIP_STACK_MODULE modId,
void* configBuff,
size_t buffSize,
size_t* pConfigSize
);
Description
Supports PIC32 Ethernet MAC Teardown (opposite of Setup). Used by tcpip_module_manager.
Preconditions
Supports PIC32 Ethernet MAC by copying its configuration..
Parameters
Parameters Description
modId Module ID from TCPIP_STACK_MODULE enumeration, identifying MAC.
configBuff Pointer to configuration buffer to be copied
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buffSize Size of configuration buffer provided by configBuff
pConfigSize Pointer to size of configuration buffer copied.
Returns
Size of configuration buffer copied.
Remarks
This function deinitializes the Eth controller, the MAC and the associated PHY. It should be called to be able to schedule any Eth
transmit or receive operation.
Example
5.1.3.7.1.3 DRV_ETHMAC_PIC32MACLinkCheck Function
C
bool DRV_ETHMAC_PIC32MACLinkCheck(
TCPIP_MAC_HANDLE hMac
);
Description
This function checks the link status, performing a MAC reconfiguration if the link went up after being down.
Preconditions
None.
Parameters
Parameters Description
hMac Ethernet MAC client handle
Returns
• true - If the link is up
• false - If the link is not up
Remarks
If auto negotiation is enabled the MAC we may have to be reconfigured.
Example
5.1.3.7.1.4 DRV_ETHMAC_PIC32MACOpen Function
C
TCPIP_MAC_HANDLE DRV_ETHMAC_PIC32MACOpen(
TCPIP_STACK_MODULE macId
);
Description
This function opens a client instance of the PIC32 MAC Driver. Used by tcpip_module_manager.
Preconditions
DRV_ETHMAC_PIC32MACSetup should have been called.
Parameters
Parameters Description
macId MAC idenfification, from the TCPIP_STACK_MODULE enumeration
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Returns
TCPIP_MAC_HANDLE - handle (pointer) to MAC client
Example
5.1.3.7.1.5 DRV_ETHMAC_PIC32MACSetup Function
C
TCPIP_MAC_RES DRV_ETHMAC_PIC32MACSetup(
TCPIP_MAC_MODULE_CTRL* const stackData,
const TCPIP_MODULE_MAC_PIC32INT_CONFIG* initData
);
Description
This function supports setup of the PIC32 Ethernet MAC. Used by tcpip_module_manager.
Preconditions
DRV_ETHMAC_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
pStackData Pointer to stack data
initData Pointer to initialization data
Returns
TCPIP_MAC_RES_OK if initialization completed; otherwise, error enumeration value.
Remarks
This function initializes the Ethernet controller, the MAC and the associated PHY. It should be called to be able to schedule any
Ethernet transmit or receive operation.
Example
5.1.3.7.1.6 DRV_ETHMAC_PIC32MACTeardown Function
C
TCPIP_MAC_RES DRV_ETHMAC_PIC32MACTeardown(
const TCPIP_MAC_MODULE_CTRL* const stackData
);
Description
This function supports teardown of the PIC32 Ethernet MAC (opposite of setup). Used by tcpip_module_manager.
Preconditions
DRV_ETHMAC_PIC32MACSetup must have been called to setup the driver.
Parameters
Parameters Description
pStackData Pointer to Stack Data
Returns
TCPIP_MAC_RES_OK if initialization completed, error enumeration value otherwise.
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Remarks
This function deinitializes the Ethernet controller, the MAC and the associated PHY. It should be called to be able to schedule
any Ethernet transmit or receive operation.
Example
5.1.3.7.2 Get and Put Functions
5.1.3.7.3 Base Address and Buffer Size Functions
5.1.3.7.4 Receive Functions
5.1.3.7.4.1 DRV_ETHMAC_PIC32MACPacketRx Function
C
TCPIP_MAC_PACKET* DRV_ETHMAC_PIC32MACPacketRx(
TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_RES* pRes,
const TCPIP_MAC_PACKET_RX_STAT** ppPktStat
);
Description
This is the MAC receive function.
Once a pending packet is available in the MAC driver internal RX queues this function will dequeue the packet and hand it over
to the MAC driver's client - i.e. the stack - for further processing.
The flags for a RX packet have to be updated by the MAC driver:
• TCPIP_MAC_PKT_FLAG_RX has to be set If the MAC supports it, it should set:
• TCPIP_MAC_PKT_FLAG_UNICAST has to be set if that packet is a unicast packet
• TCPIP_MAC_PKT_FLAG_BCAST has to be set if that packet is a broadcast packet
• TCPIP_MAC_PKT_FLAG_MCAST has to be set if that packet is a multicast packet
• TCPIP_MAC_PKT_FLAG_QUEUED has to be set
• TCPIP_MAC_PKT_FLAG_SPLIT has to be set if the packet has multiple data segments
Additional information about the packet is available by providing the pRes and ppPktStat fields.
Preconditions
DRV_ETHMAC_PIC32MACSetup() should have been called.
Parameters
Parameters Description
hMac Ethernet MAC client handle
pRes optional pointer to an address that will receive an additional result associated with
the operation. Can be 0 if not needed.
ppPktStat optional pointer to an address that will receive the received packet status. Note
that this pointer cannot be used once the packet acknowledgement function was
called. Can be 0 if not needed.
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Returns
a valid pointer to an available RX packet 0 if no packet pending/available
Remarks
The MAC driver dequeues and return to the caller just one single packet.
Once the higher level layers in the stack are done with processing the RX packet, they have to call the corresponding packet
acknowledgement function that tells the MAC driver that it can resume control of that packet.
Once the stack modules are done processing the RX packets and the acknowledge function is called the MAC driver will reuse
the RX packets.
The MAC driver may use the DRV_ETHMAC_PIC32MACProcess() for obtaining new RX packets if needed.
Example
5.1.3.7.4.2 DRV_ETHMAC_PIC32MACPacketTx Function
C
TCPIP_MAC_RES DRV_ETHMAC_PIC32MACPacketTx(
TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_PACKET * ptrPacket
);
Description
This is the MAC transmit function. The MAC driver has to suport internal queueing! A packet is to be rejected only if it's not
properly formatted. Otherwise it has to be scheduled for transmission in an internal queue!
Once the packet is scheduled for transmission the MAC driver has to set the TCPIP_MAC_PKT_FLAG_QUEUED flag so that
the stack is aware that this packet is under processing cnd cannot be modified!
Once the packet is transmitted, the TCPIP_MAC_PKT_FLAG_QUEUED has to be cleared, the proper packet acknowledgement
result (ackRes) has to be set and the packet acknowledgement function (ackFunc) has to be called. It is implementation
dependant if all these steps are implemented as part of the ackFunc itself or as discrete steps.
Preconditions
DRV_ETHMAC_PIC32MACSetup() should have been called.
Parameters
Parameters Description
hMac Ethernet MAC client handle
ptrPacket pointer to a TCPIP_MAC_PACKET that's completely formatted and ready to be
transmitted over the network
Returns
TCPIP_MAC_RES_OK if the packet transmitted, TCPIP_MAC_RES errocode for not properly formatted packets, etc.
Example
5.1.3.7.5 Transmit Functions
5.1.3.7.5.1 DRV_ETHMAC_PIC32MACRxFilterHashTableEntrySet Function
C
TCPIP_MAC_RES DRV_ETHMAC_PIC32MACRxFilterHashTableEntrySet(
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TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_ADDR* DestMACAddr
);
Description
This function salculates a CRC-32 using polynomial 0x4C11DB7 and then, using bits 28 through 23 of the CRC, sets the
appropriate bit in the ETHHT0-ETHHT1 registers.
Preconditions
DRV_ETHMAC_PIC32MACSetup() should have been called.
Parameters
Parameters Description
hMac Ethernet MAC client handle
DestMACAddr 6-byte group destination MAC address to allow through the Hash Table Filter. If
DestMACAddr is set to '0000 0000 0000', the hash table will be cleared of all
entries and the filter will be disabled.
Returns
TCPIP_MAC_RES_OK if success, an eror code otherwise.
Remarks
Sets the appropriate bit in the ETHHT0/1 registers to allow packets sent to DestMACAddr to be received and enabled the Hash
Table receive filter
There is no way to individually unset destination MAC addresses from the hash table since it is possible to have a hash collision
and therefore multiple MAC addresses relying on the same hash table bit. The stack would have to individually store each 6 byte
MAC address to support this feature, which would waste a lot of RAM and be unnecessary in most applications. As a simple
compromise, you can call DRV_ETHMAC_PIC32MACRxFilterHashTableEntrySet() using a 00-00-00-00-00-00 destination MAC
address, which will clear the entire hash table and disable the hash table filter. This will allow you to then readd the necessary
destination addresses.
Example
5.1.3.7.6 Event Functions
5.1.3.7.6.1 DRV_ETHMAC_PIC32MACEventAcknowledge Function
C
bool DRV_ETHMAC_PIC32MACEventAcknowledge(
TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_EVENT tcpAckEv
);
Description
This function acknowledges and re-enables processed events. Multiple events can be orr-ed together as they are processed
together. The events acknowledged by this function should be the events that have been retrieved from the stack by calling
DRV_ETHMAC_PIC32MACEventPendingGet() or have been passed to the user by the stack using the notification handler
(PIC32MACEventSetNotifyHandler()) and have been processed and have to be re-enabled.
Preconditions
DRV_ETHMAC_PIC32MACSetup() should have been called.
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Parameters
Parameters Description
hMac Ethernet MAC client handle
tcpAckEv the events that the user processed and need to be re-enabled
Returns
true if events acknowledged false if no events to be acknowledged
Remarks
All events should be acknowledged, in order to be re-enabled.
Some events are fatal errors and should not be acknowledged (TCPIP_MAC_EV_RX_BUSERR,
TCPIP_MAC_EV_TX_BUSERR). Stack re-initialization is needed under such circumstances.
Some events are just system/application behavior and they are intended only as simple info (TCPIP_MAC_EV_RX_OVFLOW,
TCPIP_MAC_EV_RX_BUFNA, TCPIP_MAC_EV_TX_ABORT, TCPIP_MAC_EV_RX_ACT).
The TCPIP_MAC_EV_RX_FWMARK and TCPIP_MAC_EV_RX_EWMARK events are part of the normal flow control operation
(if auto flow control was enabled). They should be enabled alternatively, if needed.
The events are persistent. They shouldn't be re-enabled unless they have been processed and the condition that generated
them was removed. Re-enabling them immediately without proper processing will have dramatic effects on system performance.
Example
DRV_ETHMAC_PIC32MACEventAcknowledge( hMac, stackNewEvents );
5.1.3.7.6.2 DRV_ETHMAC_PIC32MACEventMaskSet Function
C
bool DRV_ETHMAC_PIC32MACEventMaskSet(
TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_EVENT macEvents,
bool enable
);
Description
This function sets the enabled events. Multiple events can be orr-ed together. All events that are set will be added to the
notification process. The old events will be disabled. The stack (or stack user) has to catch the events that are notified and
process them:
• The stack should process the TCPIP_MAC_EV_RX_PKTPEND/TCPIP_MAC_EV_RX_DONE, TCPIP_MAC_EV_TX_DONE
transfer events
• Process the specific condition and acknowledge them calling DRV_ETHMAC_PIC32MACEventAcknowledge() so that they
can be re-enabled.
Preconditions
DRV_ETHMAC_PIC32MACSetup() should have been called.
Parameters
Parameters Description
hMac Ethernet MAC client handle
macEvMask events the user of the stack wants to add/delete for notification
enable if true, the events will be enabled, else disabled
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Returns
always true, operation succeeded.
Remarks
The event notification system enables the user of the TCPIP stack to call into the stack for processing only when there are
relevant events rather than being forced to periodically call from within a loop.
If the notification events are nill the interrupt processing will be disabled. Otherwise the event notification will be enabled and the
interrupts relating to the requested events will be enabled.
Note that once an event has been caught by the stack ISR (and reported if a notification handler is in place) it will be disabled
until the DRV_ETHMAC_PIC32MACEventAcknowledge() is called.
Example
DRV_ETHMAC_PIC32MACEventMaskSet( hMac, TCPIP_MAC_EV_RX_OVFLOW | TCPIP_MAC_EV_RX_BUFNA,
true );
5.1.3.7.6.3 DRV_ETHMAC_PIC32MACEventPendingGet Function
C
TCPIP_MAC_EVENT DRV_ETHMAC_PIC32MACEventPendingGet(
TCPIP_MAC_HANDLE hMac
);
Description
This function returns the currently pending events belonging to a group. Multiple events can be orr-ed together as they
accumulate. The stack should be called for processing whenever a stack managed event (TCPIP_MAC_EV_RX_PKTPEND,
TCPIP_MAC_EV_TX_DONE) is present. The other, non critical events, may not be managed by the stack and passed to an
user. They will have to be eventually acknowledged if re-enabling is needed.
Preconditions
DRV_ETHMAC_PIC32MACSetup should have been called.
Parameters
Parameters Description
hMac parameter identifying the intended MAC client
Returns
The currently stack pending events.
Remarks
This is the preferred method to get the current pending MAC events. The stack maintains a proper image of the events from their
occurrence to their acknowledgement.
Even with a notification handler in place it's better to use this function to get the current pending events rather than using the
events passed by the notification handler which could be stale.
The events are persistent. They shouldn't be re-enabled unless they have been processed and the condition that generated
them was removed. Re-enabling them immediately without proper processing will have dramatic effects on system performance.
The returned value is just a momentary value. The pending events can change any time.
Example
TCPIP_MAC_EVENT currEvents = DRV_ETHMAC_PIC32MACEventPendingGet( hMac);
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5.1.3.7.7 Library Functions
5.1.3.7.8 Other Functions
5.1.3.7.8.1 DRV_ETHMAC_PIC32MACPowerMode Function
C
bool DRV_ETHMAC_PIC32MACPowerMode(
TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_POWER_MODE pwrMode
);
Description
This function powers down the Ethernet MAC.
Preconditions
None.
Parameters
Parameters Description
hMac Ethernet MAC client handle
pwrMode Power Mode (?)
Returns
None.
Example
5.1.3.7.8.2 DRV_ETHMAC_PIC32MACProcess Function
C
TCPIP_MAC_RES DRV_ETHMAC_PIC32MACProcess(
TCPIP_MAC_HANDLE hMac
);
Description
This is a function that allows for internal processing by the MAC driver. It is meant for processing that cannot be done from within
ISR.
Some of the processing that this is intended for:
• the MAC driver can process its pending TX queues (although it should do that preferrably from within the TX ISR)
• RX buffers replenishing. If the number of packets in the RX queue falls below a specified limit, the MAC driver can use this
function to allocate some extra RX packets. Similarly, if there are too many allocated RX packets, the MAC driver can free
some of them.
Normally this function will be called in response to an TX and/or RX event signalled by the driver. This is specified by the MAC
driver at initialization time using TCPIP_MAC_MODULE_CTRL.
An alternative approach is that the MAC driver uses a system service to create a timer signal that will call the
TCPIP_MAC_Process on a periodic basis.
Preconditions
DRV_ETHMAC_PIC32MACSetup() should have been called.
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Parameters
Parameters Description
hMac Ethernet MAC client handle
Returns
TCPIP_MAC_RES_OK if all processing went on OK a TCPIP_MAC_RES error code if processing failed for some reason
Remarks
The MAC driver may use the DRV_ETHMAC_PIC32MACProcess() for obtaining new RX packets if needed.
Example
5.1.3.7.9 Data Types and Constants
5.1.3.7.9.1 ETH_CLOSE_FLAGS Enumeration
C
typedef enum {
ETH_CLOSE_GRACEFUL,
ETH_CLOSE_DEFAULT = (0)
} ETH_CLOSE_FLAGS;
Description
Ethernet Close Flags
This enumeration defines the close capabilities of the Ethernet module.
Members
Members Description
ETH_CLOSE_GRACEFUL Wait for the current TX/RX op to finish
ETH_CLOSE_DEFAULT = (0) Default close options
5.1.3.7.9.2 ETH_LINK_STATUS Enumeration
C
typedef enum {
ETH_LINK_ST_DOWN,
ETH_LINK_ST_UP,
ETH_LINK_ST_LP_NEG_UNABLE,
ETH_LINK_ST_REMOTE_FAULT,
ETH_LINK_ST_PDF,
ETH_LINK_ST_LP_PAUSE,
ETH_LINK_ST_LP_ASM_DIR,
ETH_LINK_ST_NEG_TMO,
ETH_LINK_ST_NEG_FATAL_ERR
} ETH_LINK_STATUS;
Description
Ethernet Link Status Codes
This enumeration defines the flags describing the status of the Ethernet link.
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Members
Members Description
ETH_LINK_ST_DOWN No connection to the LinkPartner
ETH_LINK_ST_UP Link is up
ETH_LINK_ST_LP_NEG_UNABLE LP non negotiation able
ETH_LINK_ST_REMOTE_FAULT LP fault during negotiation
ETH_LINK_ST_PDF Parallel Detection Fault encountered (when ETH_LINK_ST_LP_NEG_UNABLE)
ETH_LINK_ST_LP_PAUSE LP supports symmetric pause
ETH_LINK_ST_LP_ASM_DIR LP supports asymmetric TX/RX pause operation
ETH_LINK_ST_NEG_TMO LP not there
ETH_LINK_ST_NEG_FATAL_ERR An unexpected fatal error occurred during the negotiation
Remarks
Multiple flags can be set.
5.1.3.7.9.3 ETH_MODULE_STATUS Enumeration
C
typedef enum {
ETH_ST_RXBUSY,
ETH_ST_TXBUSY,
ETH_ST_BUSY
} ETH_MODULE_STATUS;
Description
Ethernet Controller Status Codes
This enumeration defines the flags describing the status of the Ethernet controller.
Members
Members Description
ETH_ST_RXBUSY A packet is currently received
ETH_ST_TXBUSY A packet is currently transmitted
ETH_ST_BUSY Module is on or completing a transaction
5.1.3.7.9.4 ETH_OPEN_FLAGS Enumeration
C
typedef enum {
ETH_OPEN_AUTO,
ETH_OPEN_FDUPLEX,
ETH_OPEN_HDUPLEX,
ETH_OPEN_100,
ETH_OPEN_10,
ETH_OPEN_HUGE_PKTS,
ETH_OPEN_MAC_LOOPBACK,
ETH_OPEN_PHY_LOOPBACK,
ETH_OPEN_MDIX_AUTO,
ETH_OPEN_MDIX_NORM,
ETH_OPEN_MDIX_SWAP,
ETH_OPEN_RMII,
ETH_OPEN_MII,
ETH_OPEN_DEFAULT = (ETH_OPEN_AUTO|ETH_OPEN_FDUPLEX|ETH_OPEN_HDUPLEX|
ETH_OPEN_100|ETH_OPEN_10|ETH_OPEN_MDIX_AUTO)
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} ETH_OPEN_FLAGS;
Description
Ethernet Open Configuration Settings
This enumeration defines the various configuration options for the Ethernet module. These values can be ORed together to
create a configuration mask passed to the EthMACOpen routine.
Members
Members Description
ETH_OPEN_AUTO Use auto negotiation. set the following flags to specify
your choices
ETH_OPEN_FDUPLEX Use full duplex or full duplex negotiation capability
needed
ETH_OPEN_HDUPLEX Use half duplex or half duplex negotiation capability
needed
ETH_OPEN_100 Use 100MBps or 100MBps negotiation capability
needed
ETH_OPEN_10 Use 10MBps or 10MBps negotiation capability needed
ETH_OPEN_HUGE_PKTS Allow huge packets RX/TX
ETH_OPEN_MAC_LOOPBACK Loopbacked at the MAC level
ETH_OPEN_PHY_LOOPBACK When PHY is loopback-ed, negotiation will be disabled!
ETH_OPEN_MDIX_AUTO Use Auto MDIX
ETH_OPEN_MDIX_NORM Use normal MDIX when Auto MDIX disabled
ETH_OPEN_MDIX_SWAP Use swapped MDIX when Auto MDIX disabled
ETH_OPEN_RMII RMII connection
ETH_OPEN_MII MII connection
ETH_OPEN_DEFAULT =
(ETH_OPEN_AUTO|ETH_OPEN_FDUPLEX|ETH_OPEN_HDUPLEX|
ETH_OPEN_100|ETH_OPEN_10|ETH_OPEN_MDIX_AUTO)
All capabilities default
Remarks
When Auto-negotiation is specified:
• If multiple capability flags are set (ETH_OPEN_FDUPLEX, ETH_OPEN_HDUPLEX, ETH_OPEN_100, ETH_OPEN_10 ) they
are all advertised as this link side capabilities.
• If no setting is passed, the lowest one is taken, i.e., ETH_OPEN_HDUPLEX and ETH_OPEN_10.
• Auto-MDIX requires Auto-Negotiation; ETH_OPEN_MDIX_NORM or ETH_OPEN_MDIX_SWAP setting irrelevant.
When No Auto-negotiation is specified:
• If multiple settings, the highest priority setting is taken, i.e. ETH_OPEN_FDUPLEX over ETH_OPEN_HDUPLEX and
ETH_OPEN_100 over ETH_OPEN_10.
• If no setting, the lowest setting is taken, i.e., ETH_OPEN_HDUPLEX and ETH_OPEN_10.
• The MDIX is set based on the ETH_OPEN_MDIX_NORM/ETH_OPEN_MDIX_SWAP setting.
5.1.3.7.9.5 ETH_PAUSE_TYPE Enumeration
C
typedef enum {
ETH_MAC_PAUSE_TYPE_NONE,
ETH_MAC_PAUSE_TYPE_PAUSE,
ETH_MAC_PAUSE_TYPE_ASM_DIR,
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ETH_MAC_PAUSE_TYPE_EN_TX,
ETH_MAC_PAUSE_TYPE_EN_RX,
ETH_MAC_PAUSE_ALL = (ETH_MAC_PAUSE_TYPE_PAUSE|ETH_MAC_PAUSE_TYPE_ASM_DIR|
ETH_MAC_PAUSE_TYPE_EN_TX|ETH_MAC_PAUSE_TYPE_EN_RX),
ETH_MAC_PAUSE_CPBL_MASK = ETH_MAC_PAUSE_ALL
} ETH_PAUSE_TYPE;
Description
Ethernet MAC Pause Types
This enumeration defines the pause capabilities of the Ethernet MAC.
Members
Members Description
ETH_MAC_PAUSE_TYPE_NONE No PAUSE capabilities
ETH_MAC_PAUSE_TYPE_PAUSE Supports symmetric PAUSE
ETH_MAC_PAUSE_TYPE_ASM_DIR Supports ASM_DIR
ETH_MAC_PAUSE_TYPE_EN_TX Enable MAC TX pause support
ETH_MAC_PAUSE_TYPE_EN_RX Enable MAC RX pause support
ETH_MAC_PAUSE_ALL =
(ETH_MAC_PAUSE_TYPE_PAUSE|ETH_MAC_PAUSE_TYPE_ASM_DIR|
ETH_MAC_PAUSE_TYPE_EN_TX|ETH_MAC_PAUSE_TYPE_EN_RX)
All types of pause
ETH_MAC_PAUSE_CPBL_MASK = ETH_MAC_PAUSE_ALL All pause capabilities our MAC supports
5.1.3.7.9.6 ETH_RESULT_CODE Enumeration
C
typedef enum {
ETH_RES_OK,
ETH_RES_NO_PACKET,
ETH_RES_PACKET_QUEUED,
ETH_RES_OUT_OF_MEMORY,
ETH_RES_NO_DESCRIPTORS,
ETH_RES_USPACE_ERR,
ETH_RES_RX_SIZE_ERR,
ETH_RES_RX_PKT_SPLIT_ERR,
ETH_RES_NEGOTIATION_UNABLE,
ETH_RES_NEGOTIATION_INACTIVE,
ETH_RES_NEGOTIATION_NOT_STARTED,
ETH_RES_NEGOTIATION_ACTIVE,
ETH_RES_NEGOTIATION_LINKDOWN,
ETH_RES_DTCT_ERR,
ETH_RES_CPBL_ERR,
ETH_RES_CFG_ERR
} ETH_RESULT_CODE;
Description
Ethernet Operation Result Codes
This enumeration defines the possible results of any of the Ethernet library operations that have the possibilty of failing. This
result should be checked to ensure that the operation achieved the desired result.
Members
Members Description
ETH_RES_OK Everything ok
ETH_RES_NO_PACKET No such packet exist
ETH_RES_PACKET_QUEUED Packet is queued (not transmitted or received and not processed)
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ETH_RES_OUT_OF_MEMORY Some memory allocation failed
ETH_RES_NO_DESCRIPTORS Not enough descriptors available
ETH_RES_USPACE_ERR We don't support user space buffers.
ETH_RES_RX_SIZE_ERR The size of the receive buffers too small
ETH_RES_RX_PKT_SPLIT_ERR A received packet spans more buffers/descriptors than supplied
ETH_RES_NEGOTIATION_UNABLE No negotiation support
ETH_RES_NEGOTIATION_INACTIVE No negotiation active
ETH_RES_NEGOTIATION_NOT_STARTED Negotiation not started yet
ETH_RES_NEGOTIATION_ACTIVE Negotiation active
ETH_RES_NEGOTIATION_LINKDOWN Link down after negotiation, negotiation failed
ETH_RES_DTCT_ERR No Phy was detected or it failed to respond to reset command
ETH_RES_CPBL_ERR No match between the capabilities: the Phy supported and the open requested
ones
ETH_RES_CFG_ERR Hardware configuration doesn't match the requested open mode
5.1.3.7.9.7 ETHPHY_CONFIG_FLAGS Enumeration
C
typedef enum {
ETH_PHY_CFG_RMII,
ETH_PHY_CFG_MII,
ETH_PHY_CFG_ALTERNATE,
ETH_PHY_CFG_DEFAULT,
ETH_PHY_CFG_AUTO
} ETHPHY_CONFIG_FLAGS;
Description
flags for DRV_ETHPHY_Setup() call
Members
Members Description
ETH_PHY_CFG_RMII RMII data interface in configuration fuses.
ETH_PHY_CFG_MII MII data interface in configuration fuses.
ETH_PHY_CFG_ALTERNATE Configuration fuses is ALT
ETH_PHY_CFG_DEFAULT Configuration fuses is DEFAULT
ETH_PHY_CFG_AUTO Use the fuses configuration to detect if you are RMII/MII and ALT/DEFAULT
configuration
5.1.3.7.9.8 DRV_ETHMAC_INDEX_1 Macro
C
#define DRV_ETHMAC_INDEX_1 1
Description
This is macro DRV_ETHMAC_INDEX_1.
5.1.3.7.9.9 DRV_ETHPHY_INDEX_1 Macro
C
#define DRV_ETHPHY_INDEX_1 1
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Description
This is macro DRV_ETHPHY_INDEX_1.
5.1.3.8 Files
Files
Name Description
drv_ethernet_flags.h Ethernet driver configuration flags file.
drv_ethmac.h Ethernet MAC device driver interface file.
drv_ethmac_config.h Ethernet MAC driver configuration definitions template.
Description
5.1.3.8.1 drv_ethernet_flags.h
Ethernet Drivers Configuration Flags
This file provides the definition of commonly-used configuration enumerations for use with the Ethernet PHY and Ethernet MAC
Drivers.
Enumerations
Name Description
ETH_CLOSE_FLAGS Defines the possible disable codes of Ethernet controller
"DRV_ETHMAC_LegacyClose" call.
ETH_LINK_STATUS Defines the possible status flags of Ethernet link.
ETH_OPEN_FLAGS Supported open configuration flags for the Ethernet module (EthMACOpen).
ETH_PAUSE_TYPE Defines the possible Ethernet MAC pause types.
ETH_RESULT_CODE Defines the possible results of Ethernet operations that can succeed or fail
ETHPHY_CONFIG_FLAGS flags for DRV_ETHPHY_Setup() call
Company
Microchip Technology Inc.
FileName: drv_ethernet_flags.h
5.1.3.8.2 drv_ethmac.h
Ethernet MAC Device Driver Interface
The Ethernet MAC device driver provides a simple interface to manage the Ethernet peripheral. This file defines the interface
definitions and prototypes for the Ethernet MAC driver.
Enumerations
Name Description
ETH_MODULE_STATUS Defines the possible status codes of the Ethernet controller.
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Functions
Name Description
DRV_ETHMAC_PIC32MACClose Closes a client instance of the PIC32 MAC Driver.
DRV_ETHMAC_PIC32MACEventAcknowledge This function acknowledges and re-enables processed
events. Multiple events can be orr-ed together as they are
processed together. The events acknowledged by this
function should be the events that have been retrieved
from the stack by calling
DRV_ETHMAC_PIC32MACEventPendingGet() or have
been passed to the user by the stack using the notification
handler (PIC32MACEventSetNotifyHandler()) and have
been processed and have to be re-enabled.
DRV_ETHMAC_PIC32MACEventMaskSet Enables the MAC events.
DRV_ETHMAC_PIC32MACEventPendingGet Returns the currently pending events.
DRV_ETHMAC_PIC32MACGetConfig Supports PIC32 Ethernet MAC by copying its
configuration..
DRV_ETHMAC_PIC32MACLinkCheck Checks current link status.
DRV_ETHMAC_PIC32MACOpen Opens a client instance of the PIC32 MAC Driver.
DRV_ETHMAC_PIC32MACPacketRx A packet is returned if such a pending packet exists.
DRV_ETHMAC_PIC32MACPacketTx A packet is submitted to the MAC driver for transmission.
DRV_ETHMAC_PIC32MACPowerMode Powers down the Ethernet MAC.
DRV_ETHMAC_PIC32MACProcess MAC periodic processing function.
DRV_ETHMAC_PIC32MACRxFilterHashTableEntrySet Calculates a CRC-32 and sets the approriate bit in the
ETHHTx registers
DRV_ETHMAC_PIC32MACSetup Supports PIC32 Ethernet MAC setup.
DRV_ETHMAC_PIC32MACTeardown Supports PIC32 Ethernet MAC Teardown (opposite of
setup).
Macros
Name Description
DRV_ETHMAC_INDEX_0 Ethernet driver index definitions.
DRV_ETHMAC_INDEX_1 This is macro DRV_ETHMAC_INDEX_1.
DRV_ETHMAC_INDEX_COUNT Number of valid Ethernet driver indices.
Company
Microchip Technology Inc.
FileName: drv_ethmac.h
5.1.3.8.3 drv_ethmac_config.h
ETHMAC Driver Configuration Definitions for the template version
These definitions statically define the driver's mode of operation.
Macros
Name Description
DRV_ETHMAC_CLIENTS_NUMBER Selects the maximum number of clients.
DRV_ETHMAC_INDEX Ethernet MAC static index selection.
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DRV_ETHMAC_INSTANCES_NUMBER Selects the maximum number of hardware instances that can be
supported by the dynamic driver.
DRV_ETHMAC_INTERRUPT_MODE Controls operation of the driver in the interrupt or polled mode.
DRV_ETHMAC_INTERRUPT_SOURCE Defines an override of the interrupt source in case of static driver.
DRV_ETHMAC_PERIPHERAL_ID Defines an override of the peripheral ID.
DRV_ETHMAC_POWER_STATE Defines an override of the power state of the Ethernet MAC driver.
File Name
drv_ethmac_config.h
Company
Microchip Technology Inc.
5.1.4 Ethernet PHY Driver Library
5.1.4.1 Introduction
Ethernet PHY Driver Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Ethernet PHY Driver Library that is available on the Microchip family of
microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module without the
necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller variant to
another.
Description
This library provides a software abstraction for configuring external Ethernet PHY devices for use with the on-chip Ethernet
Controller.
5.1.4.2 Release Notes
MPLAB Harmony Version: v0.70b Ethernet PHY Driver Library Version : 7.10 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.1.4.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
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Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.4.4 Using the Library
This topic describes the basic architecture of the Ethernet PHY Driver Library and provides information and examples on how to
use it.
Interface Header File: drv_ethphy.h
The interface to the Ethernet PHY Driver Library is defined in the "drv_ethphy.h" header file. This file is included by the
"drv_ethphy.h" file. Any C language source (.c) file that uses the Ethernet PHY Driver Library should include "drv.h".
Library File:
The Ethernet PHY Driver Library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the library interacts with the framework.
5.1.4.4.1 Abstraction Model
Overview
To understand how this library works you must first understand how an external Ethernet PHY interfaces with the Ethernet
Controller. As shown in Figure 1, the PHY has two interfaces, one for managing the PHY, known as the Serial Management
Interface (SMI), for configuring the device and a second, known as the Reduced Media Independent Interface (RMII), for transmit
and receive data.
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Figure 1: Typical External PHY Interface
The block diagram also shows an interrupt signal (nINT) going to a external interrupt pin on the host device and signals going to
on-board LEDs to show link state and link activity.
The SMI interface is also known as the MII Management (MIIM) interface. This control interface is standardized for all PHY's by
Clause 22 of the 802.3 standard. It provides up to 32 16-bit registers on the PHY. The table below provides a summary of all 32
registers. Consult the data sheet for the PHY device for the specific bit fields in each register.
Register
Address
Register Name Register Type
0 Control Basic
1 Status Basic
2,3 PHY Identifier Extended
4 Auto-Negotiation
Advertisement
Extended
5 Auto-Negotiation
Link Partner Base
Page Ability
Extended
6 Auto-Negotiation
Expansion
Extended
7 Auto-Negotiation
Next Page Transmit
Extended
8 Auto-Negotiation
Link Partner
Received Next
Page
Extended
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9 MASTER-SLAVE
Control Register
Extended
10 MASTER-SLAVE
Status Register
Extended
11-14 Reserved Extended
15 Extended Status Reserved
16-31 Vendor Specific Extended
5.1.4.4.2 Library Overview
The Ethernet PHY Driver Library is divided into the following sections:
Library Interface Section Description
System Level Functions Routines that integrate the driver into the MPLAB Harmony system
Client Level Functions Open, Close, Link Status, Auto Negotiation
SMI/MIIM Functions SMI/MIIM Management Interface
External PHY Support Functions Provides the API for PHY support routines that the driver will call when
setting up the PHY.
The driver library provides support for 4 PHYs.
Other Functions Functions that provide software version information.
Data Types and Constants C language typedefs and enums used by this library.
5.1.4.4.3 MPLAB Harmony vs. the Unified TCP/IP Stack
The following is a cross-reference of MPLAB Harmony functions and the equivalent Unified TCP/IP Stack function:
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MPLAB Harmony Function: Unified Stack Function:
DRV_ETHPHY_ClientStatus
DRV_ETHPHY_Close
DRV_ETHPHY_Deinitialize
DRV_ETHPHY_HWConfigFlagsGet
DRV_ETHPHY_Setup
DRV_ETHPHY_Initialize
DRV_ETHPHY_LinkScanRead
DRV_ETHPHY_LinkScanStart
DRV_ETHPHY_LinkScanStop
DRV_ETHPHY_LinkStatusGet
DRV_ETHPHY_NegotiationIsComplete
DRV_ETHPHY_NegotiationResultGet
DRV_ETHPHY_Open
DRV_ETHPHY_Reinitialize
DRV_ETHPHY_Reset
DRV_ETHPHY_RestartNegotiation
DRV_ETHPHY_SMIReadResultGet
DRV_ETHPHY_SMIReadStart
DRV_ETHPHY_SMIScanDataGet
DRV_ETHPHY_SMIScanStart
DRV_ETHPHY_SMIScanStatusGet
DRV_ETHPHY_SMIScanStop
DRV_ETHPHY_SMIWriteStart
DRV_ETHPHY_SMIisBusy
DRV_ETHPHY_Status
DRV_ETHPHY_Tasks
DRV_ETHPHY_VersionGet
DRV_ETHPHY_VersionStrGet
DRV_ETHPHY_SMIClockSet
-none-
-none-
-noneEthPhyGetHwConfigFlags
EthPhyInit
-noneEthPhyScanLinkRead
EthPhyScanLinkStart
EthPhyScanLinkStop
EthPhyGetLinkStatus
EthPhyNegotiationComplete
EthPhyGetNegotiationResult
-none-
-noneEthPhyReset
EthPhyRestartNegotiation
EthMIIMReadResult
EthMIIMReadStart
EthMIIMScanResult
EthMIIMScanStart
-none-
-noneEthMIIMWriteStart
-none-
-none-
-none-
-none-
-noneEthMIIMConfig
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Unified Stack Function: MPLAB Harmony Function:
EthMIIMConfig
EthMIIMReadResult
EthMIIMReadStart
EthMIIMScanResult
EthMIIMScanStart
EthMIIMWriteStart
EthPhyGetHwConfigFlags
EthPhyGetLinkStatus
EthPhyGetNegotiationResult
EthPhyInit
EthPhyNegotiationComplete
EthPhyReset
EthPhyRestartNegotiation
EthPhyScanLinkRead
EthPhyScanLinkStart
EthPhyScanLinkStop
-none-
-none-
-none-
-none-
-none-
-none-
-none-
-none-
-none-
-none-
-none-
-none-
-noneDRV_ETHPHY_SMIClockSet
DRV_ETHPHY_SMIReadResultGet
DRV_ETHPHY_SMIReadStart
DRV_ETHPHY_SMIScanDataGet
DRV_ETHPHY_SMIScanStart
DRV_ETHPHY_SMIWriteStart
DRV_ETHPHY_HWConfigFlagsGet
DRV_ETHPHY_LinkStatusGet
DRV_ETHPHY_NegotiationResultGet
DRV_ETHPHY_Setup
DRV_ETHPHY_NegotiationIsComplete
DRV_ETHPHY_Reset
DRV_ETHPHY_RestartNegotiation
DRV_ETHPHY_LinkScanRead
DRV_ETHPHY_LinkScanStart
DRV_ETHPHY_LinkScanStop
DRV_ETHPHY_ClientStatus
DRV_ETHPHY_Close
DRV_ETHPHY_Deinitialize
DRV_ETHPHY_Initialize
DRV_ETHPHY_Open
DRV_ETHPHY_Reinitialize
DRV_ETHPHY_SMIScanStatusGet
DRV_ETHPHY_SMIScanStop
DRV_ETHPHY_SMIisBusy
DRV_ETHPHY_Status
DRV_ETHPHY_Tasks
DRV_ETHPHY_VersionGet
DRV_ETHPHY_VersionStrGet
5.1.4.5 Configuring the Library
Macros
Name Description
DRV_ETHPHY_CLIENTS_NUMBER Selects the miximum number of clients.
DRV_ETHPHY_INDEX Ethernet PHY static index selection.
DRV_ETHPHY_INDEX_0 Ethernet PHY driver index definitions.
DRV_ETHPHY_INDEX_COUNT Number of valid Ethernet PHY driver indices.
DRV_ETHPHY_INSTANCES_NUMBER Selects the maximum number of hardware instances that can be
supported by the dynamic driver.
DRV_ETHPHY_PERIPHERAL_ID Defines an override of the peripheral ID.
PHY_NEG_DONE_TMO negotiation complete timeout, ms. based on IEEE 802.3 Clause 28 Table
28-9 autoneg_wait_timer value (max 1s)
PHY_NEG_INIT_TMO negotiation initiation timeout, ms.
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PHY_RESET_CLR_TMO reset self clear timeout, ms. IEEE 802.3 Clause 22 Table 22-7 and
paragraph "22.2.4.1.1 Reset" (max 0.5s)
TCPIP_IF_PIC32INT We have an internal PIC32 MAC
Description
The configuration of the Ethernet MAC Driver Library is based on the file sys_config.h
This header file contains the configuration selection for the Ethernet MAC Driver Library. Based on the selections made, the
Ethernet MAC Driver Library will support or not support selected features. These configuration settings will apply to all instances
of the Ethernet MAC Driver Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.1.4.5.1 DRV_ETHPHY_CLIENTS_NUMBER Macro
C
#define DRV_ETHPHY_CLIENTS_NUMBER 1
Description
Ethernet PHY Maximum Number of Clients
This definition select the maximum number of clients that the Ethernet PHY driver can support at run time. Not defining it means
using a single client.
Remarks
None.
5.1.4.5.2 DRV_ETHPHY_INDEX Macro
C
#define DRV_ETHPHY_INDEX DRV_ETHPHY_INDEX_1
Description
Ethernet PHY Static Index Selection
This definition selects the Ethernet PHY static index for the driver object reference.
Remarks
This index is required to make a reference to the driver object.
5.1.4.5.3 DRV_ETHPHY_INDEX_0 Macro
C
#define DRV_ETHPHY_INDEX_0 0
Description
Ethernet PHY Driver Module Index Numbers
These constants provide the Ethernet PHY driver index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals.
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These values should be passed into the DRV_ETHPHY_Initialize and DRV_ETHPHY_Open routines to identify the driver
instance in use.
5.1.4.5.4 DRV_ETHPHY_INDEX_COUNT Macro
C
#define DRV_ETHPHY_INDEX_COUNT 1
Description
Ethernet PHY Driver Module Index Count
This constant identifies the number of valid Ethernet PHY driver indices.
Remarks
This constant should be used in place of hard-coded numeric literals.
This value is derived from part-specific header files defined as part of the peripheral libraries.
5.1.4.5.5 DRV_ETHPHY_INSTANCES_NUMBER Macro
C
#define DRV_ETHPHY_INSTANCES_NUMBER 1
Description
Ethernet PHY hardware instance configuration
This definition selects the maximum number of hardware instances that can be supported by the dynamic driver. Not defining it
means using a static driver.
Remarks
None.
5.1.4.5.6 DRV_ETHPHY_PERIPHERAL_ID Macro
C
#define DRV_ETHPHY_PERIPHERAL_ID ETHPHY_ID_1
Description
Ethernet PHY Peripheral ID Selection
Defines an override of the peripheral ID, using macros.
Remarks
Some devices also support ETHPHY_ID_0
5.1.4.5.7 PHY_NEG_DONE_TMO Macro
C
#define PHY_NEG_DONE_TMO 2000 // negotiation complete timeout, ms.
Description
negotiation complete timeout, ms. based on IEEE 802.3 Clause 28 Table 28-9 autoneg_wait_timer value (max 1s)
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5.1.4.5.8 PHY_NEG_INIT_TMO Macro
C
#define PHY_NEG_INIT_TMO 1 // negotiation initiation timeout, ms.
Description
negotiation initiation timeout, ms.
5.1.4.5.9 PHY_RESET_CLR_TMO Macro
C
#define PHY_RESET_CLR_TMO 500 // reset self clear timeout, ms.
Description
reset self clear timeout, ms. IEEE 802.3 Clause 22 Table 22-7 and paragraph "22.2.4.1.1 Reset" (max 0.5s)
5.1.4.5.10 TCPIP_IF_PIC32INT Macro
C
#define TCPIP_IF_PIC32INT
Description
We have an internal PIC32 MAC
5.1.4.6 Building the Library
This section list the files that are available in the \src of the Ethernet PHY Driver. It lists which files need to be included in the
build based on either a hardware feature present on the board or configuration option selected by the system.
5.1.4.7 Library Interface
Data Types and Constants
Name Description
DRV_ETHPHY_CLIENT_STATUS Identifies the client-specific status of the Ethernet PHY driver.
DRV_ETHPHY_INIT Contains all the data necessary to initialize the Ethernet PHY device.
SMI_SCAN_DATA_STATUS Returns the status of the SMI of the Ethernet PHY.
SYS_OBJ_HANDLE_INVALID This is macro SYS_OBJ_HANDLE_INVALID.
SYS_OBJ_HANDLE_STATIC This is macro SYS_OBJ_HANDLE_STATIC.
SYS_OBJ_HANDLE SYS_MODULE_OBJ is badly named. It should be
SYS_MODULE_OBJ_HANDLE or something shorter. For brevity, it is renamed
to SYS_OBJ_HANDLE.
Client Level Functions
Name Description
DRV_ETHPHY_ClientStatus Gets the current client-specific status the Ethernet PHY driver.
DRV_ETHPHY_Close Closes an opened instance of the Ethernet PHY driver.
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DRV_ETHPHY_HWConfigFlagsGet Returns the current Ethernet PHY hardware MII/RMII and
ALTERNATE/DEFAULT configuration flags.
DRV_ETHPHY_LinkScanRead Returns current link status.
DRV_ETHPHY_LinkScanStart Starts an SMI scan of the link status.
DRV_ETHPHY_LinkScanStop Stops the SMI scan of the link status.
DRV_ETHPHY_LinkStatusGet Returns the current link status.
DRV_ETHPHY_NegotiationIsComplete Returns the results of a previously initiated Ethernet PHY negotiation.
DRV_ETHPHY_NegotiationResultGet Returns the link status after a completed negotiation.
DRV_ETHPHY_Open Opens the specified Ethernet PHY driver instance and returns a handle to
it.
DRV_ETHPHY_Reset Immediately resets the Ethernet PHY.
DRV_ETHPHY_RestartNegotiation Restarts auto-negotiation of the Ethernet PHY link.
DRV_ETHPHY_Setup Initializes Ethernet PHY communication.
External PHY Support Functions
Name Description
EXTPHY_MDIXCONFIGURE Configures the MDIX mode for the Ethernet PHY.
EXTPHY_MIICONFIGURE Configures the Ethernet PHY in one of the MII/RMII operation modes.
EXTPHY_SMIADDRESSGET Returns the SMI/MIIM address of the Ethernet PHY.
EXTPHY_SMICLOCKGET Returns the SMI/MIIM maximum clock speed in Hz of the Ethernet PHY.
Other Functions
Name Description
DRV_ETHPHY_VersionGet Gets the Ethernet PHY driver version in numerical format.
DRV_ETHPHY_VersionStrGet Gets the Ethernet PHY driver version in string format.
SMI/MIIM Functions
Name Description
DRV_ETHPHY_SMIClockSet Sets the SMI/MIIM interface clock.
DRV_ETHPHY_SMIisBusy Returns a boolean 'true' if the SMI/MIIM interface is busy with a transaction.
DRV_ETHPHY_SMIReadResultGet Gets the result of the SMI/MIIM register read.
DRV_ETHPHY_SMIReadStart Initiates SMI/MIIM read transaction.
DRV_ETHPHY_SMIScanDataGet Gets the latest SMI/MIIM scan data result.
DRV_ETHPHY_SMIScanStart Starts the scan of the SMI/MIIM register.
DRV_ETHPHY_SMIScanStatusGet Gets the status of the SMI/MIIM scan data.
DRV_ETHPHY_SMIScanStop Stops the scan of the SMI/MIIM register.
DRV_ETHPHY_SMIWriteStart Initiates a SMI/MIIM write transaction.
System Level Functions
Name Description
DRV_ETHPHY_Deinitialize Deinitializes the specified instance of the Ethernet PHY driver module.
DRV_ETHPHY_Initialize Initializes the Ethernet PHY driver.
DRV_ETHPHY_Reinitialize Reinitializes the driver and refreshes any associated hardware settings.
DRV_ETHPHY_Status Provides the current status of the Ethernet PHY driver module.
DRV_ETHPHY_Tasks Maintains the driver's state machine and implements its ISR.
Description
This section describes the Application Programming Interface (API) functions of the Ethernet PHY Driver Library.
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Refer to each section for a detailed description.
5.1.4.7.1 System Level Functions
5.1.4.7.1.1 DRV_ETHPHY_Deinitialize Function
C
void DRV_ETHPHY_Deinitialize(
SYS_OBJ_HANDLE object
);
Description
This function deinitializes the specified instance of the Ethernet PHY driver module, disabling its operation (and any hardware)
and invalidates all of the internal data.
Preconditions
The DRV_ETHPHY_Initialize function must have been called before calling this routine and a valid SYS_OBJ_HANDLE must
have been returned.
Parameters
Parameters Description
object Driver object handle, returned from DRV_ETHPHY_Initialize
Returns
None.
Remarks
Once the Initialize operation has been called, the Deinitialize operation must be called before the Initialize operation can be
called again.
Example
SYS_OBJ_HANDLE object; // Returned from DRV_ETHPHY_Initialize
SYS_STATUS status;
DRV_ETHPHY_Deinitialize(object);
status = DRV_ETHPHY_Status(object);
if (SYS_MODULE_DEINITIALIZED == status)
{
// Check again later if you need to know
// when the driver is deinitialized.
}
5.1.4.7.1.2 DRV_ETHPHY_Initialize Function
C
SYS_OBJ_HANDLE DRV_ETHPHY_Initialize(
const SYS_MODULE_INDEX index,
const SYS_MODULE_INIT * const init
);
Description
This function initializes the Ethernet PHY driver, making it ready for clients to open and use it.
Preconditions
None.
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Parameters
Parameters Description
drvIndex Index for the driver instance to be initialized
init Pointer to a data structure containing any data necessary to initialize the driver.
This pointer may be null if no data is required because static overrides have been
provided.
Returns
If successful, returns a valid handle to a driver object. Otherwise, it returns SYS_OBJ_HANDLE_INVALID. The returned object
must be passed as argument to DRV_ETHPHY_Reinitialize, DRV_ETHPHY_Deinitialize, DRV_ETHPHY_Tasks and
DRV_ETHPHY_Status routines.
Remarks
This function must be called before any other Ethernet PHY routine is called.
This function should only be called once during system initialization unless DRV_ETHPHY_Deinitialize is called to de-initialize
the driver instance.
Example
DRV_ETHPHY_INIT init;
SYS_OBJ_HANDLE objectHandle;
// Populate the Ethernet PHY initialization structure
init.phyId = ETHPHY_ID_0;
// Populate the Ethernet PHY initialization structure
init.phyId = ETHPHY_ID_2;
init.sExtPHYFunctions.MyPHYMIIConfigure = &SMSC8720_MIIConfigure;
init.sExtPHYFunctions.MyPHYMDIXConfigure = &SMSC8720_MDIXConfiguret;
init.sExtPHYFunctions.MyPHYSMIAddressGet = &SMSC8720_SMIAddressGet;
init.sExtPHYFunctions.MyPHYSMIClockGet = &SMSC8720_SMIClockGet;
// Do something
objectHandle = DRV_ETHPHY_Initialize(DRV_ETHPHY_INDEX_0, (SYS_MODULE_INIT*)&init);
if (SYS_OBJ_HANDLE_INVALID == objectHandle)
{
// Handle error
}
5.1.4.7.1.3 DRV_ETHPHY_Reinitialize Function
C
void DRV_ETHPHY_Reinitialize(
SYS_OBJ_HANDLE object,
const SYS_MODULE_INIT * const init
);
Description
This function reinitializes the driver and refreshes any associated hardware settings using the initialization data given, but it will
not interrupt any ongoing operations.
Preconditions
The DRV_ETHPHY_Initialize function must have been called before calling this routine and a valid SYS_OBJ_HANDLE must
have been returned.
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Parameters
Parameters Description
object Driver object handle, returned from the DRV_ETHPHY_Initialize routine
init Pointer to the initialization data structure
Returns
None.
Remarks
This function can be called multiple times to reinitialize the module.
This operation can be used to refresh any supported hardware registers as specified by the initialization data or to change the
power state of the module.
Example
DRV_ETHPHY_INIT init;
SYS_OBJ_HANDLE objectHandle;
// Populate the Ethernet PHY initialization structure
init.phyId = ETHPHY_ID_2;
init.sExtPHYFunctions.MyPHYMIIConfigure = &SMSC8720_MIIConfigure;
init.sExtPHYFunctions.MyPHYMDIXConfigure = &SMSC8720_MDIXConfiguret;
init.sExtPHYFunctions.MyPHYSMIAddressGet = &SMSC8720_SMIAddressGet;
init.sExtPHYFunctions.MyPHYSMIClockGet = &SMSC8720_SMIClockGet;
DRV_ETHPHY_Reinitialize(objectHandle, (SYS_MODULE_INIT*)&init);
phyStatus = DRV_ETHPHY_Status(objectHandle);
if (SYS_STATUS_BUSY == phyStatus)
{
// Check again later to ensure the driver is ready
}
else if (SYS_STATUS_ERROR >= phyStatus)
{
// Handle error
}
5.1.4.7.1.4 DRV_ETHPHY_Status Function
C
SYS_STATUS DRV_ETHPHY_Status(
SYS_OBJ_HANDLE object
);
Description
This function provides the current status of the Ethernet PHY driver module.
Preconditions
The DRV_ETHPHY_Initialize function must have been called before calling this function.
Parameters
Parameters Description
object Driver object handle, returned from DRV_ETHPHY_Initialize
Returns
SYS_STATUS_READY - Indicates that the driver is busy with a previous system level operation and cannot start another
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Remarks
Any value greater than SYS_STATUS_READY is also a normal running state in which the driver is ready to accept new
operations.
SYS_STATUS_BUSY - Indicates that the driver is busy with a previous system level operation and cannot start another
SYS_STATUS_ERROR - Indicates that the driver is in an error state
Any value less than SYS_STATUS_ERROR is also an error state.
SYS_MODULE_DEINITIALIZED - Indicates that the driver has been de-initialized
This value is less than SYS_STATUS_ERROR.
The this operation can be used to determine when any of the driver's module level operations has completed.
If the status operation returns SYS_STATUS_BUSY, the a previous operation has not yet completed. Once the status operation
returns SYS_STATUS_READY, any previous operations have completed.
The value of SYS_STATUS_ERROR is negative (-1). Any value less than that is also an error state.
This function will NEVER block waiting for hardware.
If the Status operation returns an error value, the error may be cleared by calling the reinitialize operation. If that fails, the
deinitialize operation will need to be called, followed by the initialize operation to return to normal operations.
Example
SYS_OBJ_HANDLE object; // Returned from DRV_ETHPHY_Initialize
SYS_STATUS status;
status = DRV_ETHPHY_Status(object);
else if (SYS_STATUS_ERROR >= status)
{
// Handle error
}
5.1.4.7.1.5 DRV_ETHPHY_Tasks Function
C
void DRV_ETHPHY_Tasks(
SYS_OBJ_HANDLE object
);
Description
This function is used to maintain the driver's internal state machine and implement its ISR for interrupt-driven implementations.
Preconditions
The DRV_ETHPHY_Initialize routine must have been called for the specified Ethernet PHY driver instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from
DRV_ETHPHY_Initialize)
Returns
None
Remarks
This function is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
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apropriate raw ISR.
This function may excute in an ISR context and will never block or access any resources that may cause it to block.
Example
SYS_OBJ_HANDLE object; // Returned from DRV_ETHPHY_Initialize
while (true)
{
DRV_ETHPHY_Tasks (object);
// Do other tasks
}
5.1.4.7.2 Client Level Functions
5.1.4.7.2.1 DRV_ETHPHY_ClientStatus Function
C
DRV_ETHPHY_CLIENT_STATUS DRV_ETHPHY_ClientStatus(
DRV_HANDLE handle
);
Description
This function gets the client-specfic status of the Ethernet PHY driver associated with the given handle.
Preconditions
The DRV_ETHPHY_Initialize routine must have been called.
DRV_ETHPHY_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
A DRV_ETHPHY_CLIENT_STATUS value describing the current status of the driver.
Remarks
This function will not block for hardware access and will immediately return the current status.
Example
DRV_HANDLE phyHandle; // Returned from DRV_ETHPHY_Open
DRV_ETHPHY_CLIENT_STATUS phyClientStatus;
phyClientStatus = DRV_ETHPHY_ClientStatus(phyHandle);
if(DRV_ETHPHY_CLIENT_STATUS_ERROR >= phyClientStatus)
{
// Handle the error
}
5.1.4.7.2.2 DRV_ETHPHY_Close Function
C
void DRV_ETHPHY_Close(
DRV_HANDLE handle
);
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Description
This function closes an opened instance of the Ethernet PHY driver, invalidating the handle.
Preconditions
The DRV_ETHPHY_Initialize routine must have been called for the specified Ethernet PHY driver instance.
DRV_ETHPHY_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open instance handle, returned from the driver's open routine
Returns
None
Remarks
After calling this routine, the handle passed in "handle" must not be used with any of the remaining driver routines. A new handle
must be obtained by calling DRV_ETHPHY_Open before the caller may use the driver again.
If DRV_IO_INTENT_BLOCKING was requested and the driver was built appropriately to support blocking behavior call may
block until the operation is complete.
If DRV_IO_INTENT_NON_BLOCKING request the driver client can call the DRV_ETHPHY_Status operation to find out when
the module is in the ready state (the handle is no longer valid).
Usually there is no need for the driver client to verify that the Close operation has completed.
Example
DRV_HANDLE handle; // Returned from DRV_ETHPHY_Open
DRV_ETHPHY_Close(handle);
5.1.4.7.2.3 DRV_ETHPHY_HWConfigFlagsGet Function
C
ETHPHY_CONFIG_FLAGS DRV_ETHPHY_HWConfigFlagsGet(
DRV_HANDLE handle
);
Description
This function returns the current Ethernet PHY hardware MII/RMII and ALTERNATE/DEFAULT configuration flags from the
Device Configuration Fuse bits.
Preconditions
None.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
Returns
Ethernet PHY configuration flag, see ETHPHY_CONFIG_FLAGS enumeration for bit values.
Remarks
Please note,
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• ETHPHY_CONFIG_FLAGS DRV_ETHPHY_HWConfigFlagsGet( DRV_HANDLE handle )
replaces the legacy "Ethernet Controller Library" function:
• eEthPhyCfgFlags EthPhyGetHwConfigFlags(void)
Example
5.1.4.7.2.4 DRV_ETHPHY_LinkScanRead Function
C
ETH_LINK_STATUS DRV_ETHPHY_LinkScanRead(
DRV_HANDLE handle
);
Description
This function returns the current link status.
Preconditions
DRV_ETHPHY_LinkScanStart must be called first.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
Returns
Current link status, see ETH_LINK_STATUS enumeration.
Remarks
See also DRV_ETHPHY_LinkStatusGet.
Please note,
• ETH_LINK_STATUS DRV_ETHPHY_LinkScanRead( DRV_HANDLE handle )
replaces the legacy "Ethernet Controller Library" function:
• eEthLinkStat EthPhyScanLinkRead(void)
Example
5.1.4.7.2.5 DRV_ETHPHY_LinkScanStart Function
C
void DRV_ETHPHY_LinkScanStart(
DRV_HANDLE handle
);
Description
This function starts an SMI scan of the link status.
Preconditions
Communication with the Ethernet PHY was already established.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
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Returns
None.
Remarks
This function starts an SMII scan of the Ethernet PHY link status register. It is a more efficient way of having access to the
current link status, since the normal SMI frame read operation is slow.
Please note,
• void DRV_ETHPHY_LinkScanStart( DRV_HANDLE handle )
replaces the legacy "Ethernet Controller Library" function:
• void EthPhyScanLinkStart(void)
Example
5.1.4.7.2.6 DRV_ETHPHY_LinkScanStop Function
C
void DRV_ETHPHY_LinkScanStop(
DRV_HANDLE handle
);
Description
This function stops the SMI scan of the ink status.
Preconditions
Communication with the Ethernet PHY was already established.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
Returns
None.
Remarks
Please note,
• void DRV_ETHPHY_LinkScanStop( DRV_HANDLE handle )
replaces the legacy "Ethernet Controller Library" function:
• void EthPhyScanLinkStop(void)
Example
5.1.4.7.2.7 DRV_ETHPHY_LinkStatusGet Function
C
ETH_LINK_STATUS DRV_ETHPHY_LinkStatusGet(
DRV_HANDLE handle,
bool refresh
);
Description
This function returns the urrent link status.
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Preconditions
DRV_ETHPHY_Setup should have been called.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
refresh Boolean flag, true to specify that a double read is needed
Returns
Current link status, see ETH_LINK_STATUS enumeration.
Remarks
This function reads the Ethernet PHY to get current link status If refresh is specified then, if the link is down a second read will be
performed to return the current link status.
Please note,
• ETH_LINK_STATUS DRV_ETHPHY_LinkStatusGet( DRV_HANDLE handle, bool refresh )
replaces the legacy "Ethernet Controller Library" function:
• eEthLinkStat EthPhyGetLinkStatus(int refresh)
Example
5.1.4.7.2.8 DRV_ETHPHY_NegotiationIsComplete Function
C
ETH_RESULT_CODE DRV_ETHPHY_NegotiationIsComplete(
DRV_HANDLE handle,
bool waitComplete
);
Description
This function returns the results of a previously initiated Ethernet PHY negotiation.
Preconditions
DRV_ETHPHY_Setup (and DRV_ETHPHY_RestartNegotiation) should have been called.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
waitComplete Boolean flag, true if wait for completion is required
Returns
ETH_RES_OK if negotiation is done, ETH_RES_NEGOTIATION_INACTIVE if no negotiation in progress,
ETH_RES_NEGOTIATION_NOT_STARTED if negotiation not yet started yet (means tmo if waitComplete was requested), or
ETH_RES_NEGOTIATION_ACTIVE if negotiation ongoing (means tmo if waitComplete was requested).
Remarks
See also DRV_ETHPHY_NegotiationResultGet.
Please note,
• ETH_RESULT_CODE DRV_ETHPHY_NegotiationIsComplete( DRV_HANDLE handle, bool waitComplete )
replaces the legacy "Ethernet Controller Library" function:
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• eEthRes EthPhyNegotiationComplete(int waitComplete)
Example
5.1.4.7.2.9 DRV_ETHPHY_NegotiationResultGet Function
C
ETH_LINK_STATUS DRV_ETHPHY_NegotiationResultGet(
DRV_HANDLE handle,
ETH_OPEN_FLAGS* pFlags,
ETH_PAUSE_TYPE* pPauseType
);
Description
This function returns the link status after a completed negotiation.
Preconditions
DRV_ETHPHY_Setup, DRV_ETHPHY_RestartNegotiation, and DRV_ETHPHY_NegotiationIsComplete should have been called.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
pFlags Address to store the negotiation result
pPauseType Address to store the pause type supported by the link partner
Returns
Link status after the (completed) negotiation, see ETH_LINK_STATUS enumeration.
Remarks
If no negotiation possible/active/failed, most likely the flags are invalid!
Please note,
• ETH_LINK_STATUS DRV_ETHPHY_NegotiationResultGet( DRV_HANDLE handle, ETH_OPEN_FLAGS* pFlags,
ETH_PAUSE_TYPE* pPauseType )
replaces the legacy "Ethernet Controller Library" function:
• eEthLinkStat EthPhyGetNegotiationResult(eEthOpenFlags* pFlags, eEthMacPauseType* pPauseType)
Example
5.1.4.7.2.10 DRV_ETHPHY_Open Function
C
DRV_HANDLE DRV_ETHPHY_Open(
const SYS_MODULE_INDEX drvIndex,
const DRV_IO_INTENT intent
);
Description
This function opens the specified Ethernet PHY driver instance and provides a handle that must be provided to all other
client-level operations to identify the caller and the instance of the driver.
Preconditions
The DRV_ETHPHY_Initialize function must have been called before calling this function.
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Parameters
Parameters Description
drvIndex Identifier for the object instance to be opened
intent Zero or more of the values from the enumeration DRV_IO_INTENT ORed together
to indicate the intended use of the driver
Returns
If successful, the routine returns a valid open-instance handle (a number identifying both the caller and the module instance).
If an error occurs, the return value is DRV_HANDLE_INVALID.
Remarks
The handle returned is valid until the DRV_ETHPHY_Close routine is called.
This function will NEVER block waiting for hardware.
If the DRV_IO_INTENT_BLOCKING is requested and the driver was built appropriately to support blocking behavior, other
client-level operations may block waiting on hardware until they are complete.
If DRV_IO_INTENT_NON_BLOCKING is requested the driver client can call the DRV_ETHPHY_ClientStatus operation to find
out when the module is in the ready state.
If the requested intent flags are not supported, the function will return DRV_HANDLE_INVALID.
Example
DRV_HANDLE handle;
handle = DRV_ETHPHY_Open(DRV_ETHPHY_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if (DRV_HANDLE_INVALID == handle)
{
// Unable to open the driver
}
5.1.4.7.2.11 DRV_ETHPHY_Reset Function
C
bool DRV_ETHPHY_Reset(
DRV_HANDLE handle,
bool waitComplete
);
Description
This function immediately resets the Ethernet PHY, optionally waiting for a reset to complete.
Preconditions
Communication with the Ethernet PHY was already established.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
waitComplete boolean flag, if true the procedure will wait for reset to complete
Returns
True - If PHY reset procedure completed (or completion not required) False - Otherwise
Remarks
Please note,
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• bool DRV_ETHPHY_Reset( DRV_HANDLE handle, bool waitComplete )
replaces the legacy "Ethernet Controller Library" function:
• int EthPhyReset(int waitComplete)
Example
5.1.4.7.2.12 DRV_ETHPHY_RestartNegotiation Function
C
void DRV_ETHPHY_RestartNegotiation(
DRV_HANDLE handle
);
Description
This function restarts auto-negotiation of the Ethernet PHY link.
Preconditions
The Ethernet PHY should have been initialized with the proper duplex/speed mode.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
Returns
None.
Remarks
Please note,
• void DRV_ETHPHY_RestartNegotiation( DRV_HANDLE handle )
replaces the legacy "Ethernet Controller Library" function:
• eEthRes EthPhyRestartNegotiation(void)
Example
5.1.4.7.2.13 DRV_ETHPHY_Setup Function
C
ETH_RESULT_CODE DRV_ETHPHY_Setup(
DRV_HANDLE handle,
ETH_OPEN_FLAGS oFlags,
ETHPHY_CONFIG_FLAGS cFlags,
ETH_OPEN_FLAGS * pResFlags
);
Description
This function initializes the Ethernet PHY communication. It tries to detect the external Ethernet PHY, to read the capabilties and
find a match with the requested features.Then it programs the Ethernet PHY accordingly.
Preconditions
DRV_ETHMAC_LegacyInit should have been called to initialize the Ethernet MAC.
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Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
oFlags The requested open flags
cFlags Ethernet PHY MII/RMII configuration flags
pResFlags Address to store the initialization results
Returns
ETH_RES_OK for success; otherwise, an error code.
Remarks
Please note,
• ETH_RESULT_CODE DRV_ETHPHY_Setup( DRV_HANDLE handle, ETH_OPEN_FLAGS oFlags,
ETHPHY_CONFIG_FLAGS cFlags, ETH_OPEN_FLAGS* pResFlags )
replaces the legacy "Ethernet Controller Library" function:
• eEthRes EthPhyInit(eEthOpenFlags oFlags, eEthPhyCfgFlags cFlags, eEthOpenFlags* pResFlags)
Example
5.1.4.7.3 SMI/MIIM Functions
5.1.4.7.3.1 DRV_ETHPHY_SMIClockSet Function
C
void DRV_ETHPHY_SMIClockSet(
DRV_HANDLE handle,
uint32_t hostClock,
uint32_t maxSMIClock
);
Description
This function sets SMI/MIIM interface clock base on host clock and maximum supported SMI/MIIM interface clock speed.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
hostClock Host clock speed in Hz
maxSMIClock Maximum supported SMI/MIIM clock speed in Hz
Returns
None.
Remarks
Please note,
• void DRV_ETHPHY_SMIClockSet( DRV_HANDLE handle, uint16_t hostClock, uint16_t maxSMIClock )
replaces the legacy "Ethernet Controller Library" function:
• void EthMIIMConfig(unsigned int hostClock, unsigned int miimClock)
Example
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5.1.4.7.3.2 DRV_ETHPHY_SMIisBusy Function
C
bool DRV_ETHPHY_SMIisBusy(
DRV_HANDLE handle
);
Description
This function returns a boolean 'true' if the SMI/MIIM interface is busy with a transaction.
Preconditions
MyPHYSMIClockSet() called to setup SMI/MIIM clock.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
Returns
• true - If the SMI/MIIM is busy
• false - If the SMI/MIIM is not busy
Example
5.1.4.7.3.3 DRV_ETHPHY_SMIReadResultGet Function
C
uint16_t DRV_ETHPHY_SMIReadResultGet(
DRV_HANDLE handle
);
Description
This function gets the result of the SMI/MIIM register read.
Preconditions
MyPHYSMIClockSet was called to set up the SMI/MIIM clock and DRV_ETHPHY_SMIReadStart was called to initiate a
SMI/MIIM register read. DRV_ETHPHY_SMIisBusy should return false.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
Returns
Result of the SMI/MIIM register read previously scheduled.
Remarks
Please note,
• uint16_t DRV_ETHPHY_SMIReadResultGet( DRV_HANDLE handle )
replaces the legacy "Ethernet Controller Library" function:
• unsigned short EthMIIMReadResult ( void )
Example
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5.1.4.7.3.4 DRV_ETHPHY_SMIReadStart Function
C
void DRV_ETHPHY_SMIReadStart(
DRV_HANDLE handle,
unsigned int rIx,
unsigned int phyAdd
);
Description
This function initiates SMI/MIIM read transaction for a given PHY address and register.
Preconditions
MyPHYSMIClockSet was called to set up the SMI/MIIM clock.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
rIx PHY register to be accessed
phyAdd Address of PHY to be accessed
Returns
None.
Remarks
Please note,
• void DRV_ETHPHY_SMIReadStart( DRV_HANDLE handle, unsigned int rIx, unsigned int phyAdd )
replaces the legacy "Ethernet Controller Library" function:
• void EthMIIMReadStart(unsigned int rIx, unsigned int phyAdd)
Example
5.1.4.7.3.5 DRV_ETHPHY_SMIScanDataGet Function
C
uint16_t DRV_ETHPHY_SMIScanDataGet(
DRV_HANDLE handle
);
Description
This functino gets the latest SMI/MIIM scan data result.
Preconditions
DRV_ETHPHY_SMIScanStart() has been called. DRV_ETHPHY_SMIScanStatusGet() should return SMI_SCAN_DATA_VALID.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
Returns
Current scan result.
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Remarks
Scan data status must be SMI_SCAN_DATA_VALID.
Please note,
• uint16_t DRV_ETHPHY_SMIScanDataGet( DRV_HANDLE handle )
replaces the legacy "Ethernet Controller Library" function:
• unsigned short EthMIIMScanResult(void)
Example
5.1.4.7.3.6 DRV_ETHPHY_SMIScanStart Function
C
void DRV_ETHPHY_SMIScanStart(
DRV_HANDLE handle,
unsigned int rIx,
unsigned int phyAdd
);
Description
This function starts the scan of the SMI/MIIM register.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
rIx PHY register to be accessed, 0-31
phyAdd PHY address, 0-31
Returns
None.
Remarks
Please note,
• void DRV_ETHPHY_SMIScanStart( DRV_HANDLE handle, unsigned int rIx, unsigned int phyAdd )
replaces the legacy "Ethernet Controller Library" function:
• void EthMIIMScanStart(unsigned int rIx, unsigned int phyAdd)
Example
5.1.4.7.3.7 DRV_ETHPHY_SMIScanStatusGet Function
C
SMI_SCAN_DATA_STATUS DRV_ETHPHY_SMIScanStatusGet(
DRV_HANDLE handle
);
Description
This function gets the status of the SMI/MIIM scan data.
Preconditions
DRV_ETHPHY_SMIScanStart() has been called.
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Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
Returns
SMI_SCAN_DATA_NOTVALID or SMI_SCAN_DATA_VALID
Remarks
None.
Example
5.1.4.7.3.8 DRV_ETHPHY_SMIScanStop Function
C
void DRV_ETHPHY_SMIScanStop(
DRV_HANDLE handle
);
Description
This function stops the scan of the SMI/MIIM register.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
Returns
None.
Remarks
Stops a scan transaction on the SMI interface.
Please note,
• void DRV_ETHPHY_SMIScanStop( DRV_HANDLE handle )
replaces the legacy "Ethernet Controller Library" function:
• void EthMIIMScanStop ( void )
Example
5.1.4.7.3.9 DRV_ETHPHY_SMIWriteStart Function
C
void DRV_ETHPHY_SMIWriteStart(
DRV_HANDLE handle,
unsigned int rIx,
unsigned int phyAdd,
uint16_t wData
);
Description
This function initiates SMI/MIIM write transaction for a given PHY address and register.
Preconditions
MyPHYSMIClockSet was called to set up the SMI/MIIM clock.
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Parameters
Parameters Description
handle Client's driver handle (returned from DRV_ETHPHY_Open)
rIx PHY register to be accessed
phyAdd Address of PHY to be accessed
wData Data to be written
Returns
None.
Remarks
Please note,
• void DRV_ETHPHY_SMIWriteStart( DRV_HANDLE handle, unsigned int rIx, unsigned int phyAdd, uint16_t wData )
replaces the legacy "Ethernet Controller Library" function:
• void EthMIIMWriteStart(unsigned int rIx, unsigned int phyAdd, unsigned short wData)
Example
5.1.4.7.4 External PHY Support Functions
5.1.4.7.4.1 EXTPHY_MDIXCONFIGURE Type
C
typedef ETH_RESULT_CODE (* EXTPHY_MDIXCONFIGURE)(DRV_HANDLE handle, ETH_OPEN_FLAGS oFlags);
Description
Pointer To Function: ETH_RESULT_CODE EXTPHY_MDIXConfigure( DRV_HANDLE handle, ETH_OPEN_FLAGS oFlags )
Configures the MDIX mode for the Ethernet PHY.
Preconditions
Communication to the PHY should have been established.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_PHY_Open)
oFlags Requested open flags: ETH_OPEN_MDIX_AUTO, ETH_OPEN_MDIX_NORM, or
ETH_OPEN_MDIX_NORM | ETH_OPEN_MDIX_SWAP
Returns
ETH_RES_OK - if success; otherwise, ETH_RES_CFG_ERR.
Remarks
For some external PHYs, the MDIX configuration is set by pins on the device. In this case, the function will return ETH_RES_OK
if the cFlags requests the already configured interface; otherwise, ETH_RES_CFG_ERR.
5.1.4.7.4.2 EXTPHY_MIICONFIGURE Type
C
typedef ETH_RESULT_CODE (* EXTPHY_MIICONFIGURE)(DRV_HANDLE handle, ETHPHY_CONFIG_FLAGS cFlags);
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Description
Pointer To Function: ETH_RESULT_CODE EXTPHY_MIIConfigure( DRV_HANDLE handle, ETHPHY_CONFIG_FLAGS cFlags )
Configures the Ethernet PHY in one of the MII/RMII operation modes.
Preconditions
Communication to the PHY should have been established.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_PHY_Open)
cFlags Requested configuration flags: ETH_PHY_CFG_RMII or ETH_PHY_CFG_MII
Returns
ETH_RES_OK - if success; otherwise, ETH_RES_CFG_ERR.
Remarks
For some external PHYs, the data interface is set by pins on the device or fuses in the host. In this case, the function will return
ETH_RES_OK if the cFlags requests the already configured interface; otherwise, ETH_RES_CFG_ERR.
5.1.4.7.4.3 EXTPHY_SMIADDRESSGET Type
C
typedef unsigned int (* EXTPHY_SMIADDRESSGET)(DRV_HANDLE handle);
Description
Pointer To Function: uint16_t EXTPHY_SMIAddressGet( DRV_HANDLE handle );
Returns the SMI/MIIM address of the Ethernet PHY.
Preconditions
Communication to the PHY should have been established.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_PHY_Open)
Returns
The SMI/MIIM Ethernet PHY address as an unsigned 16-bit integer.
Remarks
For some external PHYs, the MDIX configuration is set by pins on the device. In this case, the function will return ETH_RES_OK
if the cFlags requests the already configured interface; otherwise, ETH_RES_CFG_ERR.
5.1.4.7.4.4 EXTPHY_SMICLOCKGET Type
C
typedef unsigned int (* EXTPHY_SMICLOCKGET)(DRV_HANDLE handle);
Description
Pointer to Function: uint16_t EXTPHY_SMIClockGet( DRV_HANDLE handle );
Returns the SMI/MIIM maximum clock speed in Hz of the Ethernet PHY.
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Preconditions
Communication to the PHY should have been established.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_PHY_Open)
Returns
The maximum SMI/MIIM clock speed as an unsigned 16-bit integer.
Remarks
For some external PHYs, the MDIX configuration is set by pins on the device. In this case, the function will return ETH_RES_OK
if the cFlags requests the already configured interface; otherwise, ETH_RES_CFG_ERR.
5.1.4.7.5 Other Functions
5.1.4.7.5.1 DRV_ETHPHY_VersionGet Function
C
unsigned int DRV_ETHPHY_VersionGet(
const SYS_MODULE_INDEX drvIndex
);
Description
This function gets the Ethernet PHY driver version. The version is encoded as major * 10000 + minor * 100 + patch. The stringed
version can be obtained using DRV_ETHPHY_VersionStrGet()
Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the object instance to get the version for
Returns
Current driver version in numerical format.
Remarks
None.
Example
unsigned int version;
version = DRV_ETHPHY_VersionGet( DRV_ETHPHY_INDEX_1 );
if(version < 110200)
{
// Do Something
}
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5.1.4.7.5.2 DRV_ETHPHY_VersionStrGet Function
C
char * DRV_ETHPHY_VersionStrGet(
const SYS_MODULE_INDEX drvIndex
);
Description
This function gets the Ethernet PHY driver version. The version is returned as major.minor.path[type], where type is optional.
The numerical version can be obtained using DRV_ETHPHY_VersionGet()
Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the object instance to get the version for.
Returns
Current Ethernet PHY driver version in the string format.
Remarks
None.
Example
char *version;
version = DRV_ETHPHY_VersionStrGet( DRV_ETHPHY_INDEX_1 );
printf("%s", version);
5.1.4.7.6 Data Types and Constants
5.1.4.7.6.1 DRV_ETHPHY_CLIENT_STATUS Enumeration
C
typedef enum {
DRV_ETHPHY_CLIENT_STATUS_ERROR,
DRV_ETHPHY_CLIENT_STATUS_CLOSED,
DRV_ETHPHY_CLIENT_STATUS_BUSY,
DRV_ETHPHY_CLIENT_STATUS_READY
} DRV_ETHPHY_CLIENT_STATUS;
Description
Ethernet PHY Driver Client Status
This enumeration identifies the client-specific status of the Ethernet PHY driver.
Members
Members Description
DRV_ETHPHY_CLIENT_STATUS_ERROR Unspecified error condition
DRV_ETHPHY_CLIENT_STATUS_CLOSED Client is not open
DRV_ETHPHY_CLIENT_STATUS_BUSY An operation is currently in progress
DRV_ETHPHY_CLIENT_STATUS_READY Up and running, no operations running
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Remarks
None.
5.1.4.7.6.2 DRV_ETHPHY_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
ETH_MODULE_ID ethphyId;
EXTPHY_MIICONFIGURE MyPHYMIIConfigure;
EXTPHY_MDIXCONFIGURE MyPHYMDIXConfigure;
EXTPHY_SMIADDRESSGET MyPHYSMIAddressGet;
EXTPHY_SMICLOCKGET MyPHYSMIClockGet;
} DRV_ETHPHY_INIT;
Description
Ethernet PHY Device Driver Initialization Data
This structure contains all the data necessary to initialize the Ethernet PHY device.
Members
Members Description
SYS_MODULE_INIT moduleInit; System module initialization
ETH_MODULE_ID ethphyId; Identifies peripheral (PLIB-level) ID
EXTPHY_MIICONFIGURE
MyPHYMIIConfigure;
Select MII or RMII data interface
EXTPHY_MDIXCONFIGURE
MyPHYMDIXConfigure;
AutoMDIX or Manual MDIX
EXTPHY_SMIADDRESSGET
MyPHYSMIAddressGet;
Returns PHY's SMI Address
EXTPHY_SMICLOCKGET
MyPHYSMIClockGet;
Returns PHY's clock speed
Remarks
A pointer to a structure of this format containing the desired initialization data must be passed into the DRV_ETHPHY_Initialize
routine.
5.1.4.7.6.3 SMI_SCAN_DATA_STATUS Enumeration
C
typedef enum {
SMI_SCAN_DATA_NOTVALID,
SMI_SCAN_DATA_VALID
} SMI_SCAN_DATA_STATUS;
Description
SMI Interface Scan Data Status Enumeration
This enumeration returns the status of the SMI of the Ethernet PHY.
Members
Members Description
SMI_SCAN_DATA_NOTVALID SMI interface ready for new scan/read/write
SMI_SCAN_DATA_VALID SMI interface ready for new scan/read/write
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Remarks
None.
5.1.4.7.6.4 SYS_OBJ_HANDLE_INVALID Macro
C
#define SYS_OBJ_HANDLE_INVALID ( (SYS_OBJ_HANDLE) -1 )
Description
This is macro SYS_OBJ_HANDLE_INVALID.
5.1.4.7.6.5 SYS_OBJ_HANDLE_STATIC Macro
C
#define SYS_OBJ_HANDLE_STATIC ( (SYS_OBJ_HANDLE) 0 )
Description
This is macro SYS_OBJ_HANDLE_STATIC.
5.1.4.7.6.6 SYS_OBJ_HANDLE Type
C
typedef uintptr_t SYS_OBJ_HANDLE;
Description
SYS_MODULE_OBJ Rename
SYS_MODULE_OBJ is badly named. It should be SYS_MODULE_OBJ_HANDLE or something shorter. For brevity, it is
renamed to SYS_OBJ_HANDLE.
Remarks
None.
5.1.4.8 Files
Files
Name Description
drv_ethphy.h Ethernet ETHPHY Device Driver Interface File
drv_ethphy_config.h Ethernet PHY driver configuration definitions template.
Description
5.1.4.8.1 drv_ethphy.h
Ethernet ETHPHY Device Driver Interface
The Ethernet ETHPHY device driver provides a simple interface to manage an Ethernet ETHPHY peripheral using MIIM (or SMI)
interface. This file defines the interface definitions and prototypes for the Etherent ETHPHY driver.
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Enumerations
Name Description
DRV_ETHPHY_CLIENT_STATUS Identifies the client-specific status of the Ethernet PHY driver.
SMI_SCAN_DATA_STATUS Returns the status of the SMI of the Ethernet PHY.
Functions
Name Description
DRV_ETHPHY_ClientStatus Gets the current client-specific status the Ethernet PHY driver.
DRV_ETHPHY_Close Closes an opened instance of the Ethernet PHY driver.
DRV_ETHPHY_Deinitialize Deinitializes the specified instance of the Ethernet PHY driver module.
DRV_ETHPHY_HWConfigFlagsGet Returns the current Ethernet PHY hardware MII/RMII and
ALTERNATE/DEFAULT configuration flags.
DRV_ETHPHY_Initialize Initializes the Ethernet PHY driver.
DRV_ETHPHY_LinkScanRead Returns current link status.
DRV_ETHPHY_LinkScanStart Starts an SMI scan of the link status.
DRV_ETHPHY_LinkScanStop Stops the SMI scan of the link status.
DRV_ETHPHY_LinkStatusGet Returns the current link status.
DRV_ETHPHY_NegotiationIsComplete Returns the results of a previously initiated Ethernet PHY negotiation.
DRV_ETHPHY_NegotiationResultGet Returns the link status after a completed negotiation.
DRV_ETHPHY_Open Opens the specified Ethernet PHY driver instance and returns a handle to
it.
DRV_ETHPHY_Reinitialize Reinitializes the driver and refreshes any associated hardware settings.
DRV_ETHPHY_Reset Immediately resets the Ethernet PHY.
DRV_ETHPHY_RestartNegotiation Restarts auto-negotiation of the Ethernet PHY link.
DRV_ETHPHY_Setup Initializes Ethernet PHY communication.
DRV_ETHPHY_SMIClockSet Sets the SMI/MIIM interface clock.
DRV_ETHPHY_SMIisBusy Returns a boolean 'true' if the SMI/MIIM interface is busy with a
transaction.
DRV_ETHPHY_SMIReadResultGet Gets the result of the SMI/MIIM register read.
DRV_ETHPHY_SMIReadStart Initiates SMI/MIIM read transaction.
DRV_ETHPHY_SMIScanDataGet Gets the latest SMI/MIIM scan data result.
DRV_ETHPHY_SMIScanStart Starts the scan of the SMI/MIIM register.
DRV_ETHPHY_SMIScanStatusGet Gets the status of the SMI/MIIM scan data.
DRV_ETHPHY_SMIScanStop Stops the scan of the SMI/MIIM register.
DRV_ETHPHY_SMIWriteStart Initiates a SMI/MIIM write transaction.
DRV_ETHPHY_Status Provides the current status of the Ethernet PHY driver module.
DRV_ETHPHY_Tasks Maintains the driver's state machine and implements its ISR.
DRV_ETHPHY_VersionGet Gets the Ethernet PHY driver version in numerical format.
DRV_ETHPHY_VersionStrGet Gets the Ethernet PHY driver version in string format.
Macros
Name Description
DRV_ETHPHY_INDEX_0 Ethernet PHY driver index definitions.
DRV_ETHPHY_INDEX_1 This is macro DRV_ETHPHY_INDEX_1.
DRV_ETHPHY_INDEX_COUNT Number of valid Ethernet PHY driver indices.
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Structures
Name Description
DRV_ETHPHY_INIT Contains all the data necessary to initialize the Ethernet PHY device.
Types
Name Description
EXTPHY_MDIXCONFIGURE Configures the MDIX mode for the Ethernet PHY.
EXTPHY_MIICONFIGURE Configures the Ethernet PHY in one of the MII/RMII operation modes.
EXTPHY_SMIADDRESSGET Returns the SMI/MIIM address of the Ethernet PHY.
EXTPHY_SMICLOCKGET Returns the SMI/MIIM maximum clock speed in Hz of the Ethernet PHY.
Company
Microchip Technology Incorported
FileName: drv_ethphy.h
5.1.4.8.2 drv_ethphy_config.h
Ethernet PHY Driver Configuration Definitions for the Template Version
These definitions statically define the driver's mode of operation.
Macros
Name Description
DRV_ETHPHY_CLIENTS_NUMBER Selects the miximum number of clients.
DRV_ETHPHY_INDEX Ethernet PHY static index selection.
DRV_ETHPHY_INSTANCES_NUMBER Selects the maximum number of hardware instances that can be
supported by the dynamic driver.
DRV_ETHPHY_PERIPHERAL_ID Defines an override of the peripheral ID.
PHY_NEG_DONE_TMO negotiation complete timeout, ms. based on IEEE 802.3 Clause 28 Table
28-9 autoneg_wait_timer value (max 1s)
PHY_NEG_INIT_TMO negotiation initiation timeout, ms.
PHY_RESET_CLR_TMO reset self clear timeout, ms. IEEE 802.3 Clause 22 Table 22-7 and
paragraph "22.2.4.1.1 Reset" (max 0.5s)
TCPIP_IF_PIC32INT We have an internal PIC32 MAC
File Name
drv_ethphy_config.h
Company
Microchip Technology Inc.
5.1.4.8.3 drv_ethernet_flags.h
This file can be accessed through the following link: drv_ethernet_flags.h
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5.1.5 Graphics (GFX) Driver Library
5.1.5.1 Introduction
Graphics (GFX) Driver Library
for
Microchip Microcontrollers
The Graphics (GFX) Driver Layer Library is the GFX library stack available for the Microchip family of microcontrollers.
Description
The MPLAB Harmony Graphics (GFX) Library is highly modular and is optimized for Microchip’s 32-bit microcontrollers.
Additionally, the library is free for Microchip customers, easy to use, and has an open documented interface for new driver
support, which requires creation of only one C file.
5.1.5.2 Release Notes
MPLAB Harmony Version: v0.70b Graphics (GFX) Driver Layer Library Version : 4.00b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.1.5.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.1.5.4 Using the Library
5.1.5.4.1 Abstraction Model
The Graphics Driver Library structure consists of the following:
• Application Layer – This is the program that utilizes the Graphics Driver Library
• User Message Interface- This layer should be implemented by user to provide messages for the library
• Graphics Object Layer – This layer renders the widgets controls such as button, slider, window, and so on
• Graphics Primitives Layer – This layer implements the primitive drawing functions
• Device Display Driver – This layer is dependent on the display device being used
• Graphics Display Module – This is the display device being used
The library provides two configurations (Blocking and Non-Blocking).
For a Blocking configuration, all draw functions are blocking calls that delay the execution of program until rendering is done.
For a Non-Blocking configuration, draw functions do not wait for the drawing completion and release control to the program.
In this configuration, a draw function should be called repeatedly until the rendering of that particular draw function is complete.
This allows efficient use of microcontroller CPU time since it can perform other tasks if the rendering is not yet done.
5.1.5.4.2 Library Overview
This layer informs the GFX library on which graphics controller is being used along with the LCD. It takes input only from the
primitive layer. This layer contains all the hardware specific functions the primitive layer needs to render primitives onto the LCD.
Each driver contained in the GFX library has a build time structure associated with it that informs the primitive layer which
hardware specific functions are available. Thus when the primitive layer calls a specific rendering task it gets passed a pointer
from the driver of that task. If the task does not exist the driver passes back a NULL and the primitive layer and either render the
primitive without hardware support or let the application know that this feature is not available.
5.1.5.5 Configuring the Library
The configuration of the GFX driver is based on the file drv_gfx_config.h
This header file contains the configuration selection for the GFX Driver. Based on the selections made, the GFX Driver will
support or not support selected features. These configuration settings will apply to all instances of the GFX Driver.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
The configuration of the GFX driver layer is mainly dependent on making sure the needed driver has the core driver functions
inside of it. The main rendering one being a PixelPut type function for the GFX primitive layer.
Once the GFX driver structure (GFX_DRV_DATA) is defined along with its primitive function rendering structure
(GFX_DRV_FUNCTIONS) it can be used by the GFX primitive layer.
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5.1.5.6 Building the Library
This section lists the files that are available in the /src folder of the GFX driver. It lists which files need to be included in the build
based on either a hardware feature present on the board or a configuration option selected by the system.
5.1.5.7 Library Interface
Data Types and Constants
Name Description
GFX_DRV_DATA Structure containing the driver graphics controller data.
GFX_DRV_FUNCTIONS Structure containing the driver functions used by the primitive layer.
LAYER_TYPE types of Layers supported by the GFX Library
PAGE_TYPE types of pages supported by the GFX Library
NUM_ALPHA_LEVELS Specific to device
ALPHA_DELTA This is macro ALPHA_DELTA.
GFX_CONFIG_DRIVER_COUNT This is macro GFX_CONFIG_DRIVER_COUNT.
GFX_ALPHA_PARAMS This is type GFX_ALPHA_PARAMS.
GFX_LAYER_PARAMS This is type GFX_LAYER_PARAMS.
System Functions
Name Description
Percentage2Alpha
DriverInterfaceInit This is function DriverInterfaceInit.
Description
All of the drivers in the GFX library must follow certain guidelines to be used by the GFX Primitve. These guidelines are defined
in gfx_gol_display_driver.h
The GFX primitve calls function pointers to reference a particular GFX driver function. If the function does not exist for a
particular driver (ie Alpha Blending) then the driver defines the function as NULL at buildtime. The function structure for a driver
file can be seen in "Basic Renderring Routines".
5.1.5.7.1 System Functions
5.1.5.7.1.1 Percentage2Alpha Function
C
inline uint8_t Percentage2Alpha(
uint8_t alphaPercentage
);
5.1.5.7.1.2 DriverInterfaceInit Function
C
inline void DriverInterfaceInit(
DRV_HANDLE * pmphandle,
DRV_PMP_MODE_CONFIG * config
);
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Description
This is function DriverInterfaceInit.
5.1.5.7.2 Data Types and Constants
5.1.5.7.2.1 GFX_DRV_DATA Structure
C
typedef struct {
uint16_t orientation;
uint16_t horizontalResolution;
uint16_t verticalResolution;
uint16_t dataWidth;
uint16_t horizontalPulseWidth;
uint16_t horizontalBackPorch;
uint16_t horizontalFrontPorch;
uint16_t verticalPulseWidth;
uint16_t verticalBackPorch;
uint16_t verticalFrontPorch;
uint8_t logicShift;
enum {
LCD_TFT = 1,
LCD_MSTN,
LCD_CSTN
} LCDType;
uint8_t colorType;
uint8_t timingControl;
GFX_DRV_FUNCTIONS PrimitiveFunction;
uint8_t driverBusy;
uint8_t ready;
GFX_COLOR color;
volatile uint8_t activePage;
volatile uint8_t visualPage;
} GFX_DRV_DATA;
Description
Structure: GFX_DRV_DATA
Each driver in order to be registered with the primitive layer needs these values. they are mainly dependent on the chosen LCD.
Members
Members Description
uint16_t orientation; Orientation of the display (given in degrees of 0,90,180,270)
uint16_t horizontalResolution; Horizontal Resolution of the displayed orientation in Pixels
uint16_t verticalResolution; Vertical resolution of the displayed orientation in pixels
uint16_t horizontalPulseWidth; Horizontal Pulse Width of the LCD
uint16_t horizontalBackPorch; Horizontal BackPorch of the LCD
uint16_t horizontalFrontPorch; Horizontal FrontPorch of the LCD
uint16_t verticalPulseWidth; Vertical Pulse width of the LCD
uint16_t verticalBackPorch; Vertical BackPorch of the LCD
uint16_t verticalFrontPorch; Vertical FrontPorch of the LCD
uint8_t logicShift; Rising/Falling edge indicator of the LCD pixel clock
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enum {
LCD_TFT = 1,
LCD_MSTN,
LCD_CSTN
} LCDType;
LCD type
uint8_t colorType; color depth (18BPP, 24BPP, 8BPP, palette)
uint8_t timingControl; flag to
GFX_DRV_FUNCTIONS PrimitiveFunction; List of Primitive Renderring functions available by the driver
uint8_t driverBusy; Flag to indicate driver is currently busy
uint8_t ready; Flag to indicate driver has been initialized and recognized by the primitive layer
GFX_COLOR color; current Color set for the display driver
volatile uint8_t activePage; current activepage set for the display driver
volatile uint8_t visualPage; current visualPage set for the display driver
5.1.5.7.2.2 GFX_DRV_FUNCTIONS Structure
C
typedef struct {
uint16_t (* PixelsPut)(short,short,uint16_t, uint16_t);
uint16_t (* BarFill)(short,short,short,short);
uint16_t* (* PixelArrayPut)(uint16_t*,short,short,uint16_t, uint16_t);
uint16_t* (* PixelArrayGet)(uint16_t*,short,short,uint16_t);
uint16_t (* PixelPut)(short,short);
void (* ColorSet)(GFX_COLOR);
void (* InstanceSet)(uint8_t);
uint16_t (* PageSet)(uint8_t, uint8_t);
uint16_t* (* Layer)(uint8_t, GFX_LAYER_PARAMS*);
uint16_t (* PixelGet)(short,short);
uint16_t* (* AlphaBlendWindow)(GFX_ALPHA_PARAMS*, uint16_t, uint16_t, uint8_t);
} GFX_DRV_FUNCTIONS;
Description
Structure: GFX_DRV_FUNCTIONS
This structure needs to be defined in the driver file to inform the primitive layer as to what functions are available.
Members
Members Description
uint16_t (* PixelsPut)(short,short,uint16_t,
uint16_t);
This function sends pixels of an X,Y location to the LCD controller of a given
count and linecount.
uint16_t (* BarFill)(short,short,short,short); This function sends a 2D accelerated Bar command to the LCD controller
uint16_t* (*
PixelArrayPut)(uint16_t*,short,short,uint16_t,
uint16_t);
This function sends an array of pixels at an X,Y location to the LCD controller of
a given count and linecount from a memory location.
uint16_t* (*
PixelArrayGet)(uint16_t*,short,short,uint16_t);
This function gets an array of pixels at an X,Y location to the LCD controller of
a given count and linecount from a memory location.
uint16_t (* PixelPut)(short,short); This function sends a pixel of an X,Y location to the LCD controller.
void (* ColorSet)(GFX_COLOR); This function sets the global color for the display driver
void (* InstanceSet)(uint8_t); This function sets the global color for the display driver
uint16_t (* PageSet)(uint8_t, uint8_t); See Primitive PageSet Defition
uint16_t* (* Layer)(uint8_t,
GFX_LAYER_PARAMS*);
See Primitive Layer Definition
uint16_t (* PixelGet)(short,short); This function gets a pixel of an X,Y location to the LCD controller.
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uint16_t* (*
AlphaBlendWindow)(GFX_ALPHA_PARAMS*,
uint16_t, uint16_t, uint8_t);
See Primitive AlphaBlendWindow Definition
5.1.5.7.2.3 LAYER_TYPE Enumeration
C
typedef enum {
PIP1 = 0,
PIP2
} LAYER_TYPE;
Description
Enumeration: LAYER_TYPE
5.1.5.7.2.4 PAGE_TYPE Enumeration
C
typedef enum {
ACTIVE_PAGE = 0,
VISUAL_PAGE,
BACKGROUND_PAGE,
FOREGROUND_PAGE,
DESTINATION_PAGE,
TRANSITION_PAGE
} PAGE_TYPE;
Description
Enumeration: PAGE_TYPE
Members
Members Description
TRANSITION_PAGE Page that displays the transition
5.1.5.7.2.5 NUM_ALPHA_LEVELS Macro
C
#define NUM_ALPHA_LEVELS 0x20 // Specific to device
Description
Specific to device
5.1.5.7.2.6 ALPHA_DELTA Macro
C
#define ALPHA_DELTA ((NUM_ALPHA_LEVELS) << 5)
Description
This is macro ALPHA_DELTA.
5.1.5.7.2.7 GFX_CONFIG_DRIVER_COUNT Macro
C
#define GFX_CONFIG_DRIVER_COUNT 1
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Description
This is macro GFX_CONFIG_DRIVER_COUNT.
5.1.5.7.2.8 GFX_ALPHA_PARAMS Structure
C
typedef struct {
uint8_t foregroundPage;
short foregroundLeft;
short foregroundTop;
uint8_t backgroundPage;
short backgroundLeft;
short backgroundTop;
uint8_t destinationPage;
short destinationLeft;
short destinationTop;
uint8_t alpha;
GFX_COLOR prevAlphaColor;
} GFX_ALPHA_PARAMS;
Description
This is type GFX_ALPHA_PARAMS.
5.1.5.7.2.9 GFX_LAYER_PARAMS Structure
C
typedef struct {
uint8_t type;
uint8_t on;
uint8_t page;
short left;
short top;
uint16_t width;
uint16_t height;
short layerLeft;
short layerTop;
} GFX_LAYER_PARAMS;
Description
This is type GFX_LAYER_PARAMS.
5.1.5.8 Files
Files
Name Description
drv_gfx_display.h GFX Display Driver definitions
drv_gfx_config_template.h This is file drv_gfx_config_template.h.
Description
5.1.5.8.1 drv_gfx_display.h
GFX Display Driver definitions
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This file describes the GFX Display Driver specific definitions.
Enumerations
Name Description
LAYER_TYPE types of Layers supported by the GFX Library
PAGE_TYPE types of pages supported by the GFX Library
Files
Name Description
drv_gfx_lcc.h Interface for the graphics library where the primitives are renderred and sent to the
graphics controller either external or internal
drv_gfx_s1d13517.h Interface for the graphics library where the primitives are renderred and sent to the
graphics controller either external or internal
drv_gfx_ssd1926.h Interface for the graphics library where the primitives are renderred and sent to the
graphics controller either external or internal
Functions
Name Description
DriverInterfaceInit This is function DriverInterfaceInit.
Percentage2Alpha
Macros
Name Description
ALPHA_DELTA This is macro ALPHA_DELTA.
GFX_CONFIG_DRIVER_COUNT This is macro GFX_CONFIG_DRIVER_COUNT.
NUM_ALPHA_LEVELS Specific to device
Structures
Name Description
GFX_ALPHA_PARAMS This is type GFX_ALPHA_PARAMS.
GFX_DRV_DATA Structure containing the driver graphics controller data.
GFX_DRV_FUNCTIONS Structure containing the driver functions used by the primitive layer.
GFX_LAYER_PARAMS This is type GFX_LAYER_PARAMS.
Company
Microchip Technology Incorporated
FileName: gfx_display_driver.h
5.1.5.8.1.1 drv_gfx_lcc.h
None
Enumerations
Name Description
DMA_ISR_TASK This is type DMA_ISR_TASK.
LCC_TASK This is type LCC_TASK.
Functions
Name Description
GFX_DRV_lcc_BrightnessSet Sets the brightness of the display backlight.
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GFX_DRV_lcc_Close closes an instance of the graphics controller
GFX_DRV_lcc_Initialize resets LCD, initializes PMP
GFX_DRV_lcc_Layer This is function GFX_DRV_lcc_Layer.
GFX_DRV_lcc_Open opens an instance of the graphics controller
GFX_DRV_lcc_PixelArrayGet gets an array of pixels of length count starting at *color
GFX_DRV_lcc_PixelArrayPut outputs an array of pixels of length count starting at *color
GFX_DRV_lcc_PixelPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_lcc_PixelsPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_lcc_SetColor Sets the color for the driver instance
GFX_DRV_lcc_SetInstance Sets the instance for the driver
GFX_DRV_lcc_SetPage This is function GFX_DRV_lcc_SetPage.
GFX_DRV_lcc_Tasks Task machine that renders the driver calls for the graphics library it must be called
peridically to output the contents of its circular buffer
GFX_PRIM_SetPIPWindow This is function GFX_PRIM_SetPIPWindow.
Macros
Name Description
GFX_DRV_lcc_COMMANDQUEUESIZE This is macro GFX_DRV_lcc_COMMANDQUEUESIZE.
PIP_BUFFER This is macro PIP_BUFFER.
USE_LCC_SCROLLING This is macro USE_LCC_SCROLLING.
USE_PIP This is macro USE_PIP.
Structures
Name Description
GFX_DRV_lcc_COMMAND Structure for the commands in the driver queue.
File Name
drv_gfx_lcc.h
Company
Microchip Technology Incorporated
5.1.5.8.1.2 drv_gfx_s1d13517.h
None
Functions
Name Description
GFX_DRV_S1D13517_AlphaBlendWindow SEE primitive layer alphablendWindow definition
GFX_DRV_S1D13517_BrightnessSet Sets the brightness of the display backlight.
GFX_DRV_S1D13517_Close closes an instance of the graphics controller
GFX_DRV_S1D13517_GetReg returns graphics controller register value (byte access)
GFX_DRV_S1D13517_Initialize resets LCD, initializes PMP
GFX_DRV_S1D13517_Layer Updates a Layer depending on the layer parameters.
GFX_DRV_S1D13517_Open opens an instance of the graphics controller
GFX_DRV_S1D13517_PixelArrayPut outputs an array of pixels of length count starting at *color
GFX_DRV_S1D13517_PixelPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_S1D13517_PixelsPut outputs one pixel into the frame buffer at the x,y coordinate given
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GFX_DRV_S1D13517_SetColor Sets the color for the driver instance
GFX_DRV_S1D13517_SetInstance Sets the instance for the driver
GFX_DRV_S1D13517_SetPage Sets the page of a certain page type
GFX_DRV_S1D13517_SetReg updates graphics controller register value (byte access)
GFX_DRV_S1D13517_Tasks Task machine that renders the driver calls for the graphics library it
must be called peridically to output the contents of its circular buffer
Structures
Name Description
GFX_DRV_S1D13517_COMMAND Structure for the commands in the driver queue.
LAYER_REGISTERS This structure is used to describe layer registers.
File Name
S1D13517.h
Company
Microchip Technology Incorporated
5.1.5.8.1.3 drv_gfx_ssd1926.h
None
Functions
Name Description
GFX_DRV_SSD1926_BarFill Hardware accelerated barfill function
GFX_DRV_SSD1926_BrightnessSet Sets the brightness of the display backlight.
GFX_DRV_SSD1926_Busy Returns non-zero if LCD controller is busy (previous drawing operation is not
completed).
GFX_DRV_SSD1926_Close closes an instance of the graphics controller
GFX_DRV_SSD1926_GetReg returns graphics controller register value (byte access)
GFX_DRV_SSD1926_Initialize resets LCD, initializes PMP
GFX_DRV_SSD1926_Open opens an instance of the graphics controller
GFX_DRV_SSD1926_PixelArrayGet gets an array of pixels of length count starting at *color
GFX_DRV_SSD1926_PixelArrayPut outputs an array of pixels of length count starting at *color
GFX_DRV_SSD1926_PixelPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_SSD1926_PixelsPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_SSD1926_SetColor Sets the color for the driver instance
GFX_DRV_SSD1926_SetInstance Sets the instance for the driver
GFX_DRV_SSD1926_SetReg updates graphics controller register value (byte access)
GFX_DRV_SSD1926_Tasks Task machine that renders the driver calls for the graphics library it must be
called peridically to output the contents of its circular buffer
Structures
Name Description
GFX_DRV_SSD1926_COMMAND Structure for the commands in the driver queue.
GFX_DRV_SSD1926_TASK Structure for the task machine
File Name
SSD1926.h
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Company
Microchip Technology Incorporated
5.1.5.8.2 drv_gfx_config_template.h
This is file drv_gfx_config_template.h.
5.1.5.9 Software Drivers
5.1.5.9.1 Low-Cost Controllerless (LCC) Graphics Driver Library
5.1.5.9.1.1 Introduction
Low-Cost Controllerless Graphics Driver Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Low-Cost Controllerless Graphics Controller Driver Library that is available on
the Microchip family of microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the
module without the necessity of interacting directly with the module's registers, there by hiding differences from one
microcontroller variant to another.
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
5.1.5.9.1.2 Release Notes
MPLAB Harmony Version: v0.70b Low-Cost Controllerless Graphics Driver Library Version : 4.00b Release Date:
18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
DMA Channel 1 is non-configurable. The LCC driver will require DMA Channel 1 and not allow configuration via Harmony
system services.
5.1.5.9.1.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.5.9.1.4 Using the Library
This topic describes the basic architecture of the Low-Cost Controllerless (LCC) Graphics Driver Library and provides
information and examples on how to use it.
Interface Header File: gfx_drv_lcc.h
The interface to the Low-Cost Controllerless (LCC) Graphics Driver library is defined in the "gfx_drv_lcc.h" header file. This file is
included by the "gfx_drv_lcc.h" file. Any C language source (.c) file that uses the Low-Cost Controllerless (LCC) Graphics Driver
Library should include "gfx_drv_lcc.h".
Library File:
The GFX Low-Cost Controller library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the Low-Cost Controllerless (LCC) Graphics Driver Library interacts with
the framework.
5.1.5.9.1.4.1 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Low-Cost Controllerless (LCC) Graphics Controller Driver module.
Library Interface Section Description
Functions This section lists the API functions available in the library.
5.1.5.9.1.4.2 Abstraction Model
This library provides the low-level abstraction of the Low-Cost Controllerless (LCC) Graphics Controller Driver module on the
Microchip family of graphic display controllers with a convenient C language interface. This topic describes how that abstraction
is modeled in the software and introduces the library interface.
Description
Low-Cost Controllerless (LCC) Graphics Controller Driver Abstraction Block Diagram
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
5.1.5.9.1.5 Configuring the Library
The configuration of the Low-Cost Controllerless (LCC) Graphics Driver Library is based on the file system_config.h.
This header file contains the configuration selection for the GFX Low-Cost Controller. Based on the selections made, the
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Low-Cost Controllerless (LCC) Graphics Driver Library will support or not support selected features. These configuration settings
will apply to all instances of the Low-Cost Controllerless (LCC) Graphics Driver Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.1.5.9.1.6 Building the Library
This section list the files that are available in the \src of theLow-Cost Controllerless (LCC) Graphics Driver Library. It lists which
files need to be included in the build based on either a hardware feature present on the board or configuration option selected by
the system.
• gfx_drv_lcc.c
5.1.5.9.1.7 Library Interface
This section describes the Application Programming Interface (API) functions of the Low-Cost Controllerless (LCC) Graphics
Driver Library.
Refer to each section for a detailed description.
5.1.5.9.1.7.1 Functions
Functions
Name Description
GFX_DRV_lcc_Close closes an instance of the graphics controller
GFX_DRV_lcc_Initialize resets LCD, initializes PMP
GFX_DRV_lcc_Open opens an instance of the graphics controller
GFX_DRV_lcc_Tasks Task machine that renders the driver calls for the graphics library it must be called
peridically to output the contents of its circular buffer
GFX_DRV_lcc_BrightnessSet Sets the brightness of the display backlight.
GFX_DRV_lcc_PixelArrayGet gets an array of pixels of length count starting at *color
GFX_DRV_lcc_PixelArrayPut outputs an array of pixels of length count starting at *color
GFX_DRV_lcc_PixelPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_lcc_PixelsPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_lcc_SetColor Sets the color for the driver instance
GFX_DRV_lcc_SetInstance Sets the instance for the driver
GFX_DRV_lcc_Layer This is function GFX_DRV_lcc_Layer.
GFX_DRV_lcc_SetPage This is function GFX_DRV_lcc_SetPage.
GFX_PRIM_SetPIPWindow This is function GFX_PRIM_SetPIPWindow.
Description
5.1.5.9.1.7.1.1 GFX_DRV_lcc_Close Function
C
uint16_t GFX_DRV_lcc_Close(
uint8_t instance
);
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Description
none
Returns
0 - instance closed 2 - instance doesn't exist 3 - instance already closed
5.1.5.9.1.7.1.2 GFX_DRV_lcc_Initialize Function
C
uint16_t GFX_DRV_lcc_Initialize(
uint8_t instance
);
Description
none
Parameters
Parameters Description
instance driver instance
Returns
NULL - call not successful (PMP driver busy) !NULL - address of the display driver queue command
5.1.5.9.1.7.1.3 GFX_DRV_lcc_Open Function
C
uint16_t GFX_DRV_lcc_Open(
uint8_t instance
);
Description
none
Returns
1 - driver not initialied 2 - instance doesn't exist 3 - instance already open instance to driver when successful
5.1.5.9.1.7.1.4 GFX_DRV_lcc_Tasks Function
C
void GFX_DRV_lcc_Tasks();
5.1.5.9.1.7.1.5 GFX_DRV_lcc_BrightnessSet Function
C
void GFX_DRV_lcc_BrightnessSet(
uint8_t instance,
uint16_t level
);
Description
none
Parameters
Parameters Description
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5.1.5.9.1.7.1.6 GFX_DRV_lcc_PixelArrayGet Function
C
uint16_t* GFX_DRV_lcc_PixelArrayGet(
uint16_t * color,
short x,
short y,
uint16_t count
);
Description
none
Parameters
Parameters Description
instance driver instance
*color start of the array
x x coordinate of the start point.
y y coordinate of the end point.
count number of pixels
Returns
NULL - call not successful (lcc driver busy) !NULL - address of the display driver queue command
5.1.5.9.1.7.1.7 GFX_DRV_lcc_PixelArrayPut Function
C
uint16_t* GFX_DRV_lcc_PixelArrayPut(
uint16_t * color,
short x,
short y,
uint16_t count,
uint16_t lineCount
);
Description
none
Parameters
Parameters Description
instance driver instance
*color start of the array
x x coordinate of the start point.
y y coordinate of the end point.
count number of pixels
Returns
NULL - call not successful !NULL - handle to the number of pixels remaining
5.1.5.9.1.7.1.8 GFX_DRV_lcc_PixelPut Function
C
uint16_t GFX_DRV_lcc_PixelPut(
short x,
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short y
);
Description
none
Parameters
Parameters Description
x,y pixel coordinates
Returns
NULL - call not successful (lcc driver busy) !NULL - address of the display driver queue command
5.1.5.9.1.7.1.9 GFX_DRV_lcc_PixelsPut Function
C
uint16_t GFX_DRV_lcc_PixelsPut(
short x,
short y,
uint16_t count,
uint16_t lineCount
);
Description
none
Parameters
Parameters Description
x,y pixel coordinates
Returns
NULL - call not successful (lcc driver busy) !NULL - address of the display driver queue command
5.1.5.9.1.7.1.10 GFX_DRV_lcc_SetColor Function
C
void GFX_DRV_lcc_SetColor(
GFX_COLOR color
);
Returns
none
5.1.5.9.1.7.1.11 GFX_DRV_lcc_SetInstance Function
C
void GFX_DRV_lcc_SetInstance(
uint8_t instance
);
Returns
none
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5.1.5.9.1.7.1.12 GFX_DRV_lcc_Layer Function
C
uint16_t* GFX_DRV_lcc_Layer(
uint8_t instance,
GFX_LAYER_PARAMS* layer
);
Description
This is function GFX_DRV_lcc_Layer.
5.1.5.9.1.7.1.13 GFX_DRV_lcc_SetPage Function
C
uint16_t GFX_DRV_lcc_SetPage(
uint8_t pageType,
uint8_t page
);
Description
This is function GFX_DRV_lcc_SetPage.
5.1.5.9.1.7.1.14 GFX_PRIM_SetPIPWindow Function
C
void GFX_PRIM_SetPIPWindow(
uint16_t left,
uint16_t top,
uint16_t hlength,
uint16_t vlength,
uint16_t pipx,
uint16_t pipy
);
Description
This is function GFX_PRIM_SetPIPWindow.
5.1.5.9.1.7.2 Data Types and Constants
Enumerations
Name Description
LCC_TASK This is type LCC_TASK.
DMA_ISR_TASK This is type DMA_ISR_TASK.
Macros
Name Description
USE_LCC_SCROLLING This is macro USE_LCC_SCROLLING.
USE_PIP This is macro USE_PIP.
PIP_BUFFER This is macro PIP_BUFFER.
GFX_DRV_lcc_COMMANDQUEUESIZE This is macro GFX_DRV_lcc_COMMANDQUEUESIZE.
Structures
Name Description
GFX_DRV_lcc_COMMAND Structure for the commands in the driver queue.
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Description
5.1.5.9.1.7.2.1 USE_LCC_SCROLLING Macro
C
#define USE_LCC_SCROLLING
Description
This is macro USE_LCC_SCROLLING.
5.1.5.9.1.7.2.2 USE_PIP Macro
C
#define USE_PIP
Description
This is macro USE_PIP.
5.1.5.9.1.7.2.3 GFX_DRV_lcc_COMMAND Structure
C
typedef struct {
uint8_t instance;
union {
uint32_t Val;
struct {
uint8_t b0 : 1;
uint8_t b1 : 1;
uint8_t b2 : 1;
uint8_t b3 : 1;
uint8_t b4 : 1;
uint8_t b5 : 1;
uint8_t b6 : 1;
uint8_t b7 : 1;
uint8_t b8 : 1;
uint8_t b9 : 1;
uint8_t b10 : 1;
uint8_t b11 : 1;
uint8_t b12 : 1;
uint8_t b13 : 1;
uint8_t b14 : 1;
uint8_t b15 : 1;
uint8_t b16 : 1;
uint8_t b17 : 1;
uint8_t b18 : 1;
uint8_t b19 : 1;
uint8_t b20 : 1;
uint8_t b21 : 1;
uint8_t b22 : 1;
uint8_t b23 : 1;
uint8_t b24 : 1;
uint8_t b25 : 1;
uint8_t b26 : 1;
uint8_t b27 : 1;
uint8_t b28 : 1;
uint8_t b29 : 1;
uint8_t b30 : 1;
uint8_t b31 : 1;
} bits;
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} address;
uint16_t * array;
uint16_t data;
uint16_t count;
uint16_t lineCount;
uint8_t task;
} GFX_DRV_lcc_COMMAND;
Description
Structure: GFX_DRV_lcc_COMMAND
None
5.1.5.9.1.7.2.4 PIP_BUFFER Macro
C
#define PIP_BUFFER (3)
Description
This is macro PIP_BUFFER.
5.1.5.9.1.7.2.5 LCC_TASK Enumeration
C
typedef enum {
UPDATE_CLOCK = 0,
INITIALIZE,
WAIT_TRANSMIT_PIXELS,
FINISH_TRANSMIT_PIXELS,
WAIT_TRANSMIT_ARRAY,
FINISH_TRANSMIT_ARRAY,
WAIT_RECEIVE,
READ_RECEIVE,
PUT_ARRAY,
PUT_PIXELS,
GET_PIXELS,
COPY_PIXELS,
PAGE,
LAYERS
} LCC_TASK;
Description
This is type LCC_TASK.
5.1.5.9.1.7.2.6 GFX_DRV_lcc_COMMANDQUEUESIZE Macro
C
#define GFX_DRV_lcc_COMMANDQUEUESIZE 480
Description
This is macro GFX_DRV_lcc_COMMANDQUEUESIZE.
5.1.5.9.1.7.2.7 DMA_ISR_TASK Enumeration
C
typedef enum {
ACTIVE_PERIOD = 0,
BLANKING_PERIOD,
FINISH_LINE,
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OVERFLOW,
PIP,
SCROLL
} DMA_ISR_TASK;
Description
This is type DMA_ISR_TASK.
5.1.5.9.1.8 Files
Files
Name Description
5.1.5.9.1.8.1 drv_gfx_lcc_config_template.h
• Module for Microchip Graphics Library
• This file contains compile time options for the Graphics Library.
*******************************************************************
• FileName: GraphicsConfig.h
• Dependencies: none
• Processor: PIC24F, PIC24H, dsPIC, PIC32
• Compiler: C30 V3.00/C32
• Company: Microchip Technology, Inc.
*
• Software License Agreement
*
• Copyright © 2008 Microchip Technology Inc. All rights reserved.
• Microchip licenses to you the right to use, modify, copy and distribute
• Software only when embedded on a Microchip microcontroller or digital
• signal controller, which is integrated into your product or third party
• product (pursuant to the sublicense terms in the accompanying license
• agreement).
*
• You should refer to the license agreement accompanying this Software
• for additional information regarding your rights and obligations.
*
• SOFTWARE AND DOCUMENTATION ARE PROVIDED ?AS IS? WITHOUT WARRANTY OF ANY
• KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY
• OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
• PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
• OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION,
• BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
• DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL,
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• INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
• COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY
• CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
• OR OTHER SIMILAR COSTS.
*
• Author Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
• Anton Alkhimenok 10/28/2007 Initial Version
• Pradeep Budagutta 10/28/2007 Display related defines
• moved to DisplayConfig.h
5.1.5.10 Hardware Drivers
5.1.5.10.1 OTM2201A Graphics Controller Driver Library
5.1.5.10.1.1 Introduction
OTM2201A Graphics Controller Driver Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the OTM2201A Graphics Controller Driver Library that is available on the
Microchip family of microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the
module without the necessity of interacting directly with the module's registers, there by hiding differences from one
microcontroller variant to another.
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
5.1.5.10.1.2 Release Notes
MPLAB Harmony Version: v0.70b OTM2201A Graphics Controller Driver Library Version : 4.00b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.1.5.10.1.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
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Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.5.10.1.4 Using the Library
This topic describes the basic architecture of the OTM2201A Graphics Controller Driver Library and provides information and
examples on how to use it.
Interface Header File: drv_gfx_otm2201a.h
The interface to the OTM2201A Graphics Controller Driver library is defined in the "drv_gfx_otm2201a.h" header file. This file is
included by the "gfx_primitive.h" file. Any C language source (.c) file that uses the OTM2201A Graphics Controller Driver library
should include "gfx_primitive.h".
Library File:
The OTM2201A Graphics Controller Driver library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the OTM2201A Graphics Controller Driver interacts with the framework.
5.1.5.10.1.4.1 Abstraction Model
This library provides the low-level abstraction of the OTM2201A Graphics Controller Driver module on the Microchip family of
microcontrollers with a convenient C language interface. This topic describes how that abstraction is modeled in the software
and introduces the library interface.
Description
OTM2201A Graphics Controller Driver Abstraction Block Diagram
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
5.1.5.10.1.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the OTM2201 Graphics Controller Driver module.
Library Interface Section Description
Functions This section lists the API functions available in the library.
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5.1.5.10.1.5 Configuring the Driver Library
The configuration of the OTM2201 Graphics Controller Driver is based on the file sys_config.h
This header file contains the configuration selection for the OTM2201 Graphics Controller Driver. Based on the selections made,
the OTM2201 Graphics Controller Driver will support or not support selected features. These configuration settings will apply to
all instances of the OTM2201 Graphics Controller Driver.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.1.5.10.1.6 Building the Library
This section list the files that are available in the \src of the OTM2201A Graphics Controller Driver. It lists which files need to be
included in the build based on either a hardware feature present on the board or configuration option selected by the system.
• drv_gfx_otm2201a.c
5.1.5.10.1.7 Library Interface
This section describes the Application Programming Interface (API) functions of the OTM2201A Graphics Controller Driver
Library.
Refer to each section for a detailed description.
5.1.5.10.1.7.1 Functions
Functions
Name Description
GFX_DRV_OTM2201A_AddressSet Sets the start GRAM address where pixel data to be written
GFX_DRV_OTM2201A_BrightnessSet Sets the brightness of the display backlight.
GFX_DRV_OTM2201A_Busy Returns non-zero value if LCD controller is busy (previous drawing
operation is not completed).
GFX_DRV_OTM2201A_Close Closes an instance of the graphics controller
GFX_DRV_OTM2201A_ColorSet Sets the color for the driver instance
GFX_DRV_OTM2201A_Initialize Intialize OTM2201A device
GFX_DRV_OTM2201A_InstanceSet Sets the instance for the driver
GFX_DRV_OTM2201A_Open Opens an instance of the graphics controller
GFX_DRV_OTM2201A_PixelArrayGet Gets an array of pixels of length count into an array starting at *color
GFX_DRV_OTM2201A_PixelArrayPut Outputs an array of pixels of length count starting at *color
GFX_DRV_OTM2201A_PixelPut Outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_OTM2201A_PixelsPut Outputs count number of pixels into the frame buffer from the given x,y
coordinate.
GFX_DRV_OTM2201A_RegGet Returns graphics controller register value (byte access)
GFX_DRV_OTM2201A_RegSet Updates graphics controller register value (byte access)
GFX_DRV_OTM2201A_Tasks Task machine that renders the driver calls for the graphics library it must
be called peridically to output the contents of its circular buffer
Description
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5.1.5.10.1.7.1.1 GFX_DRV_OTM2201A_AddressSet Function
C
uint16_t GFX_DRV_OTM2201A_AddressSet(
uint32_t address
);
Description
Address consists of Lower 8 bit at Register REG_RAM_ADDR_LOW and Higher 8 bit at Register REG_RAM_ADDR_HIGH
Parameters
Parameters Description
address pixel address
Returns
DRV_OTM2201A_ERROR_PMP_WRITE - returns error during PMP Write, DRV_OTM2201A_ERROR_NO_ERROR - returns
success without any error.
5.1.5.10.1.7.1.2 GFX_DRV_OTM2201A_BrightnessSet Function
C
void GFX_DRV_OTM2201A_BrightnessSet(
uint8_t instance,
uint16_t level
);
Description
Sets the brightness of the display backlight.
Parameters
Parameters Description
instance instance of the driver
level Brightness level. Valid values are 0 to 100. 0 = brightness level is zero or display
is turned off. 100 = brightness level is maximum.
Returns
none
5.1.5.10.1.7.1.3 GFX_DRV_OTM2201A_Busy Function
C
uint16_t GFX_DRV_OTM2201A_Busy(
uint8_t instance
);
Description
Returns non-zero value if LCD controller is busy (previous drawing operation is not completed).
Parameters
Parameters Description
instance driver instance
Returns
DRV_OTM2201A_ERROR_DEVICE_BUSY - Device is busy, DRV_OTM2201A_ERROR_NO_ERROR - Success, driver is not
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busy.
5.1.5.10.1.7.1.4 GFX_DRV_OTM2201A_Close Function
C
uint16_t GFX_DRV_OTM2201A_Close(
uint8_t instance
);
Description
Closes an instance if instance exists and not already closed
Parameters
Parameters Description
instance instance of the driver
Returns
DRV_OTM2201A_INSTANCE_CLOSED - instance closed, DRV_OTM2201A_INSTANCE_DOESNT_EXIST - instance doesn't
exist, DRV_OTM2201A_INSTANCE_ALREADY_CLOSED - instance already closed.
5.1.5.10.1.7.1.5 GFX_DRV_OTM2201A_ColorSet Function
C
void GFX_DRV_OTM2201A_ColorSet(
GFX_COLOR color
);
Description
Sets the color for the driver instance
Parameters
Parameters Description
color 16 bit 565 format color value
Returns
none
5.1.5.10.1.7.1.6 GFX_DRV_OTM2201A_Initialize Function
C
uint16_t GFX_DRV_OTM2201A_Initialize(
uint8_t instance
);
Description
Initialize OTM2201A device by initializing PMP interface, initializing command buffer for current instance initialize device registers
Parameters
Parameters Description
instance driver instance
Returns
DRV_OTM2201A_ERROR_QUEUE_FULL - OTM2201A command queue is full, DRV_OTM2201A_ERROR_REG_GET -
OTM2201A Error while reading register, DRV_OTM2201A_ERROR_REG_SET - OTM2201A Error while writing register,
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DRV_OTM2201A_ERROR_DEVICE_BUSY - OTM2201A device is busy, DRV_OTM2201A_ERROR_NO_ERROR - Success
without any error.
5.1.5.10.1.7.1.7 GFX_DRV_OTM2201A_InstanceSet Function
C
void GFX_DRV_OTM2201A_InstanceSet(
uint8_t instance
);
Description
Sets the instance for the driver
Parameters
Parameters Description
instance driver instance
Returns
none
5.1.5.10.1.7.1.8 GFX_DRV_OTM2201A_Open Function
C
uint16_t GFX_DRV_OTM2201A_Open(
uint8_t instance
);
Description
Opens the instance of driver if instance is valid and not already opened
Parameters
Parameters Description
instance instance of the driver
Returns
DRV_OTM2201A_NEW_INSTANCE_OPEN - driver not initialied, DRV_OTM2201A_INSTANCE_DOESNT_EXIST - instance
doesn't exist, DRV_OTM2201A_INSTANCE_ALREADY_OPEN - instance already open.
5.1.5.10.1.7.1.9 GFX_DRV_OTM2201A_PixelArrayGet Function
C
uint16_t* GFX_DRV_OTM2201A_PixelArrayGet(
uint16_t * color,
short x,
short y,
uint16_t count
);
Description
Gets an array of pixels of length count into an array starting at *color
Parameters
Parameters Description
color Pointer to array where color data is to be loaded
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x pixel coordinate on x axis
y pixel coordinate on y axis
count count number of pixels
Returns
DRV_OTM2201A_ERROR_QUEUE_FULL - OTM2201A command queue is full, DRV_OTM2201A_ERROR_NO_ERROR -
Success without any error.
5.1.5.10.1.7.1.10 GFX_DRV_OTM2201A_PixelArrayPut Function
C
uint16_t* GFX_DRV_OTM2201A_PixelArrayPut(
uint16_t * color,
short x,
short y,
uint16_t count,
uint16_t lineCount
);
Description
Outputs an array of pixels of length count starting at *color
Parameters
Parameters Description
color pointer to array of color of pixels
x pixel coordinate on x axis.
y pixel coordinate on y axis.
count count number of pixels
lineCount lineCount number of display lines
Returns
handle - handle to the number of pixels remaining, DRV_OTM2201A_ERROR_QUEUE_FULL - OTM2201A command queue is
full.
5.1.5.10.1.7.1.11 GFX_DRV_OTM2201A_PixelPut Function
C
uint16_t GFX_DRV_OTM2201A_PixelPut(
short x,
short y
);
Description
Outputs one pixel into the frame buffer at the x,y coordinate given
Parameters
Parameters Description
x pixel coordinate on x axis
y pixel coordinate on y axis
Returns
DRV_OTM2201A_ERROR_QUEUE_FULL - OTM2201A command queue is full, DRV_OTM2201A_ERROR_NO_ERROR -
Success without any error.
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5.1.5.10.1.7.1.12 GFX_DRV_OTM2201A_PixelsPut Function
C
uint16_t GFX_DRV_OTM2201A_PixelsPut(
short x,
short y,
uint16_t count,
uint16_t lineCount
);
Description
Outputs count number of pixels into the frame buffer from the given x,y coordinate.
Parameters
Parameters Description
x pixel coordinate on x axis
y pixel coordinate on y axis
count count number of pixels
lineCount lineCount number of display lines
Returns
DRV_OTM2201A_ERROR_QUEUE_FULL - OTM2201A command queue is full, DRV_OTM2201A_ERROR_NO_ERROR -
Success without any error.
5.1.5.10.1.7.1.13 GFX_DRV_OTM2201A_RegGet Function
C
uint8_t GFX_DRV_OTM2201A_RegGet(
uint16_t index,
uint16_t * data
);
Description
Returns graphics controller register value (byte access)
Parameters
Parameters Description
index register number
*data array to store register data
Returns
DRV_OTM2201A_ERROR_PMP_WRITE - returns error during PMP Write, DRV_OTM2201A_ERROR_PMP_READ - returns
error during PMP Read, DRV_OTM2201A_ERROR_NO_ERROR - returns success without any error.
5.1.5.10.1.7.1.14 GFX_DRV_OTM2201A_RegSet Function
C
uint16_t GFX_DRV_OTM2201A_RegSet(
uint16_t index,
uint16_t value,
uint32_t repeatCount
);
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Description
This call can set "value" of the register accessed by its "index" and can repeat the same by number of times mentioned in
"repeatCount"
Parameters
Parameters Description
index register number
value value to write to register
repeatCount repeatCount number of times value is to be written to the register.
Returns
DRV_OTM2201A_ERROR_PMP_WRITE - returns error during PMP Write, DRV_OTM2201A_ERROR_NO_ERROR - returns
success without any error.
5.1.5.10.1.7.1.15 GFX_DRV_OTM2201A_Tasks Function
C
void GFX_DRV_OTM2201A_Tasks();
Description
Task machine that renders the driver calls for the graphics library it must be called peridically to output the contents of its circular
buffer.
5.1.5.10.1.7.2 Data Types and Constants
Enumerations
Name Description
OTM2201A_TASK Enumeration for command type.
Structures
Name Description
GFX_DRV_OTM2201A_COMMAND Structure for the commands in the driver queue.
Description
5.1.5.10.1.7.2.1 GFX_DRV_OTM2201A_COMMAND Structure
C
typedef struct {
uint8_t instance;
uint32_t address;
uint16_t * array;
uint16_t data;
uint16_t count;
uint16_t lineCount;
OTM2201A_TASK task;
} GFX_DRV_OTM2201A_COMMAND;
Description
Structure: GFX_DRV_OTM2201A_COMMAND
Structure for the commands in the driver queue.
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Parameters
Parameters Description
instance instance of the driver
address pixel address
array pointer to array of pixel data
data pixel color
count count number of pixels in one line
lineCount lineCount number of lines of display
task Type of task (OTM2201A_TASK enum)
5.1.5.10.1.7.2.2 OTM2201A_TASK Enumeration
C
typedef enum {
INITIALIZE = 0,
BUSY,
PUT_ARRAY,
PUT_PIXELS
} OTM2201A_TASK;
Description
Enum: OTM2201A_TASK
Enumeration for command type.
Parameters
Parameters Description
INITIALIZE driver initialization task
BUSY driver busy task
PUT_ARRAY driver put array task
PUT_PIXELS driver put pixels task
5.1.5.10.1.7.3 Files
Files
Name Description
drv_gfx_otm2201a.h Interface for the graphics library where the primitives are renderred and sent to the
graphics controller either external or internal
Description
5.1.5.10.1.7.3.1 drv_gfx_otm2201a.h
None
Enumerations
Name Description
OTM2201A_TASK Enumeration for command type.
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Functions
Name Description
GFX_DRV_OTM2201A_AddressSet Sets the start GRAM address where pixel data to be written
GFX_DRV_OTM2201A_BrightnessSet Sets the brightness of the display backlight.
GFX_DRV_OTM2201A_Busy Returns non-zero value if LCD controller is busy (previous drawing
operation is not completed).
GFX_DRV_OTM2201A_Close Closes an instance of the graphics controller
GFX_DRV_OTM2201A_ColorSet Sets the color for the driver instance
GFX_DRV_OTM2201A_Initialize Intialize OTM2201A device
GFX_DRV_OTM2201A_InstanceSet Sets the instance for the driver
GFX_DRV_OTM2201A_Open Opens an instance of the graphics controller
GFX_DRV_OTM2201A_PixelArrayGet Gets an array of pixels of length count into an array starting at *color
GFX_DRV_OTM2201A_PixelArrayPut Outputs an array of pixels of length count starting at *color
GFX_DRV_OTM2201A_PixelPut Outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_OTM2201A_PixelsPut Outputs count number of pixels into the frame buffer from the given x,y
coordinate.
GFX_DRV_OTM2201A_RegGet Returns graphics controller register value (byte access)
GFX_DRV_OTM2201A_RegSet Updates graphics controller register value (byte access)
GFX_DRV_OTM2201A_Tasks Task machine that renders the driver calls for the graphics library it must
be called peridically to output the contents of its circular buffer
Structures
Name Description
GFX_DRV_OTM2201A_COMMAND Structure for the commands in the driver queue.
File Name
drv_gfx_otm2201a.h
Company
Microchip Technology Incorporated
5.1.5.10.2 S1D13517 Graphics Controller Driver Library
5.1.5.10.2.1 Introduction
S1D13517 Graphics Controller Driver Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the S1D13517 Graphics Controller Driver Library that is available on the Microchip
family of microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module
without the necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller
variant to another.
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
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5.1.5.10.2.2 Release Notes
MPLAB Harmony Version: v0.70b S1D13517 Graphics Driver Library Version : 4.00b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.1.5.10.2.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.5.10.2.4 Using the Library
This topic describes the basic architecture of the S1D13517 Graphics Controller Driver Library and provides information and
examples on how to use it.
Interface Header File: gfx_drv_s1d13517.h
The interface to the S1D13517 Graphics Controller Driver Library is defined in the "gfx_drv_s1d13517.h" header file. This file is
included by the "gfx_drv_s1d13517.h" file. Any C language source (.c) file that uses the S1D13517 Graphics Controller Driver
Library should include "gfx_drv_s1d13517.h".
Library File:
The S1D13517 Graphics Controller Driver Library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the GFX S1D13517 Controller Driver interacts with the framework.
5.1.5.10.2.4.1 Abstraction Model
This library provides the low-level abstraction of the S1D13517 Graphics Controller Driver module of the Microchip family of
graphic display controllers with a convenient C language interface. This topic describes how that abstraction is modeled in the
software and introduces the library interface.
Description
S1D13517 Graphics Controller Driver Abstraction Block Diagram
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Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
5.1.5.10.2.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the S1D13517 Graphics Controller Driver module.
Library Interface Section Description
Functions This section lists the API functions available in the library.
5.1.5.10.2.5 Configuring the Library
Macros
Name Description
USE_ANALOGCLOCK Enable Analog Clock Object.
5.1.5.10.2.5.1 USE_ANALOGCLOCK Macro
C
#define USE_ANALOGCLOCK
Description
Enable Analog Clock Object.
5.1.5.10.2.5.2 USE_BITMAP_FLASH Macro
C
#define USE_BITMAP_FLASH
Description
Similar to Font data bitmaps can also be placed in two locations. One is in FLASH memory and the other is from external
memory. Definining one or both enables the support for bitmaps located in internal flash and external memory. Define this in
GraphicsConfig.h
• USE_BITMAP_FLASH - Images located in internal flash memory.
• USE_BITMAP_EXTERNAL - Images located in external memory (including external memory mapped to EDS)..
5.1.5.10.2.5.3 USE_BUTTON Macro
C
#define USE_BUTTON
Description
Enable Button Object.
5.1.5.10.2.5.4 USE_CHART Macro
C
#define USE_CHART
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Description
This is macro USE_CHART.
5.1.5.10.2.5.5 USE_CHECKBOX Macro
C
#define USE_CHECKBOX
Description
Enable Checkbox Object.
5.1.5.10.2.5.6 USE_COMP_RLE Macro
C
#define USE_COMP_RLE
Description
• Overview: To enable support for DEFLATE compressed images for PutImage().
• When this macro is enabled, the PutImage() function will
• be able to process images generated by the Graphics Resource
• Converter (GRC) that are compressed using the DEFLATE algorithm.
• PutImage() will need the IPU module of the Microchip Graphics
• Module to decompress. Enable this feature only when the driver
• features the IPU module (example: PIC24FJ2456DA210).
• Define this in GraphicsConfig.h
*
******************************************************************
#define USE_COMP_IPU
5.1.5.10.2.5.7 USE_CUSTOM Macro
C
#define USE_CUSTOM
Description
Enable Custom Control Object (an example to create customized Object).
5.1.5.10.2.5.8 USE_DIGITALMETER Macro
C
#define USE_DIGITALMETER
Description
Enable DigitalMeter Object.
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5.1.5.10.2.5.9 USE_EDITBOX Macro
C
#define USE_EDITBOX
Description
Enable Edit Box Object.
5.1.5.10.2.5.10 USE_FONT_FLASH Macro
C
#define USE_FONT_FLASH
5.1.5.10.2.5.11 USE_GOL Macro
C
#define USE_GOL
Description
Enable Graphics Object Layer.
5.1.5.10.2.5.12 USE_GRADIENT Macro
C
#define USE_GRADIENT
Description
To enable support for Gradient bars and bevel primitives. Define this in GraphicsConfig.h.
5.1.5.10.2.5.13 USE_GROUPBOX Macro
C
#define USE_GROUPBOX
Description
Enable Group Box Object.
5.1.5.10.2.5.14 USE_LISTBOX Macro
C
#define USE_LISTBOX
Description
Enable List Box Object.
5.1.5.10.2.5.15 USE_METER Macro
C
#define USE_METER
Description
Enable Meter Object.
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5.1.5.10.2.5.16 USE_MULTIBYTECHAR Macro
C
#define USE_MULTIBYTECHAR
Description
To enable support for unicode fonts, USE_MULTIBYTECHAR must be defined. This sets the XCHAR definition (0-2^16 range).
See XCHAR for details. Define this in GraphicsConfig.h
5.1.5.10.2.5.17 USE_PICTURE Macro
C
#define USE_PICTURE
Description
Enable Picture Object.
5.1.5.10.2.5.18 USE_PROGRESSBAR Macro
C
#define USE_PROGRESSBAR
Description
Enable Progress Bar Object.
5.1.5.10.2.5.19 USE_RADIOBUTTON Macro
C
#define USE_RADIOBUTTON
Description
Enable Radio Button Object.
5.1.5.10.2.5.20 USE_ROUNDDIAL Macro
C
#define USE_ROUNDDIAL
Description
Enable Dial Object.
5.1.5.10.2.5.21 USE_SLIDER Macro
C
#define USE_SLIDER
Description
Enable Slider or Scroll Bar Object.
5.1.5.10.2.5.22 USE_STATICTEXT Macro
C
#define USE_STATICTEXT
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Description
Enable Static Text Object.
5.1.5.10.2.5.23 USE_TEXTENTRY Macro
C
#define USE_TEXTENTRY
Description
Enable TextEntry Object.
5.1.5.10.2.5.24 USE_TOUCHSCREEN Macro
C
#define USE_TOUCHSCREEN
5.1.5.10.2.5.25 USE_WINDOW Macro
C
#define USE_WINDOW
Description
Enable Window Object.
5.1.5.10.2.5.26 COLOR_DEPTH Macro
C
#define COLOR_DEPTH 16
Description
Specifies the color depth used in the application defined in GraphicsConfig.h.
5.1.5.10.2.5.27 DRIVER_COUNT Macro
C
#define DRIVER_COUNT 1
Description
• Overview: For XC16 or C30 builds only: When placing fonts in internal
• data memory, there is a 32K limit for data space. The total
• data should not exceed 32K. When this is unavoidable, the macro
• USE_GFX_FONT_IN_PROGRAM_SECTION will relocate the font in
• program space. This will remove the 32K restriction but at
• the expense of slower access.
• Define this in GraphicsConfig.h to enable the font to be
• placed in program space.
*
******************************************************************
#define USE_GFX_FONT_IN_PROGRAM_SECTION
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5.1.5.10.2.5.28 GFX_free Macro
C
#define GFX_free(pObj) free(pObj) //
Description
When using Operating Systems (OS), define the OS specific malloc() and free() functions for compatibility with the OS based
systems. Define these in GraphicsConfig.h
5.1.5.10.2.5.29 GFX_malloc Macro
C
#define GFX_malloc(size) malloc(size)
Description
When using Operating Systems (OS), define the OS specific malloc() and free() functions for compatibility with the OS based
systems. Define these in GraphicsConfig.h
5.1.5.10.2.6 Building the Library
This section list the files that are available in the \src of the S1D13517 Graphics Controller Driver Library. It lists which files need
to be included in the build based on either a hardware feature present on the board or configuration option selected by the
system.
• drv_gfx_s1d13517.c
5.1.5.10.2.7 Library Interface
This section describes the Application Programming Interface (API) functions of the S1D13517 Graphics Controller Driver Library.
Refer to each section for a detailed description.
5.1.5.10.2.7.1 Functions
Functions
Name Description
GFX_DRV_S1D13517_AlphaBlendWindow SEE primitive layer alphablendWindow definition
GFX_DRV_S1D13517_BrightnessSet Sets the brightness of the display backlight.
GFX_DRV_S1D13517_Close closes an instance of the graphics controller
GFX_DRV_S1D13517_GetReg returns graphics controller register value (byte access)
GFX_DRV_S1D13517_Initialize resets LCD, initializes PMP
GFX_DRV_S1D13517_Layer Updates a Layer depending on the layer parameters.
GFX_DRV_S1D13517_Open opens an instance of the graphics controller
GFX_DRV_S1D13517_PixelArrayPut outputs an array of pixels of length count starting at *color
GFX_DRV_S1D13517_PixelPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_S1D13517_PixelsPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_S1D13517_SetColor Sets the color for the driver instance
GFX_DRV_S1D13517_SetInstance Sets the instance for the driver
GFX_DRV_S1D13517_SetPage Sets the page of a certain page type
GFX_DRV_S1D13517_SetReg updates graphics controller register value (byte access)
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GFX_DRV_S1D13517_Tasks Task machine that renders the driver calls for the graphics library it
must be called peridically to output the contents of its circular buffer
Description
5.1.5.10.2.7.1.1 GFX_DRV_S1D13517_AlphaBlendWindow Function
C
uint16_t* GFX_DRV_S1D13517_AlphaBlendWindow(
GFX_ALPHA_PARAMS* alphaParams,
uint16_t width,
uint16_t height,
uint8_t alpha
);
5.1.5.10.2.7.1.2 GFX_DRV_S1D13517_BrightnessSet Function
C
void GFX_DRV_S1D13517_BrightnessSet(
uint8_t instance,
uint16_t level
);
Description
none
Parameters
Parameters Description
5.1.5.10.2.7.1.3 GFX_DRV_S1D13517_Close Function
C
uint16_t GFX_DRV_S1D13517_Close(
uint8_t instance
);
Description
none
Returns
0 - instance closed 2 - instance doesn't exist 3 - instance already closed
5.1.5.10.2.7.1.4 GFX_DRV_S1D13517_GetReg Function
C
uint8_t GFX_DRV_S1D13517_GetReg(
uint8_t index
);
Description
none
Parameters
Parameters Description
index register number
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*data array to store data
Returns
0 - when call was passed
5.1.5.10.2.7.1.5 GFX_DRV_S1D13517_Initialize Function
C
uint16_t GFX_DRV_S1D13517_Initialize(
uint8_t instance
);
Description
none
Parameters
Parameters Description
instance driver instance
Returns
NULL - call not successful (PMP driver busy) !NULL - address of the display driver queue command
5.1.5.10.2.7.1.6 GFX_DRV_S1D13517_Layer Function
C
uint16_t* GFX_DRV_S1D13517_Layer(
uint8_t type,
GFX_LAYER_PARAMS* layer
);
Description
none
Parameters
Parameters Description
type layer type
layer parameters for Layer function call
Returns
NULL - call not successful (PMP driver busy) !NULL - address of the display driver queue command
5.1.5.10.2.7.1.7 GFX_DRV_S1D13517_Open Function
C
uint16_t GFX_DRV_S1D13517_Open(
uint8_t instance
);
Description
none
Returns
1 - driver not initialied 2 - instance doesn't exist 3 - instance already open instance to driver when successful
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5.1.5.10.2.7.1.8 GFX_DRV_S1D13517_PixelArrayPut Function
C
uint16_t* GFX_DRV_S1D13517_PixelArrayPut(
uint16_t * color,
short x,
short y,
uint16_t count,
uint16_t lineCount
);
Description
none
Parameters
Parameters Description
*color start of the array
x x coordinate of the start point.
y y coordinate of the end point.
count number of pixels
Returns
NULL - call not successful (PMP driver busy) !NULL - address to the number of pixels yet to be serviced
5.1.5.10.2.7.1.9 GFX_DRV_S1D13517_PixelPut Function
C
uint16_t GFX_DRV_S1D13517_PixelPut(
short x,
short y
);
Description
none
Parameters
Parameters Description
instance driver instance
color color to output
x,y pixel coordinates
Returns
NULL - call not successful (PMP driver busy) !NULL - address of the display driver queue command
5.1.5.10.2.7.1.10 GFX_DRV_S1D13517_PixelsPut Function
C
uint16_t GFX_DRV_S1D13517_PixelsPut(
short x,
short y,
uint16_t count,
uint16_t lineCount
);
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Description
none
Parameters
Parameters Description
instance driver instance
color color to output
x,y pixel coordinates
Returns
NULL - call not successful (PMP driver busy) !NULL - address of the display driver queue command
5.1.5.10.2.7.1.11 GFX_DRV_S1D13517_SetColor Function
C
void GFX_DRV_S1D13517_SetColor(
GFX_COLOR color
);
Returns
none
5.1.5.10.2.7.1.12 GFX_DRV_S1D13517_SetInstance Function
C
void GFX_DRV_S1D13517_SetInstance(
uint8_t instance
);
Returns
none
5.1.5.10.2.7.1.13 GFX_DRV_S1D13517_SetPage Function
C
uint16_t GFX_DRV_S1D13517_SetPage(
uint8_t pageType,
uint8_t page
);
Description
none
Parameters
Parameters Description
instance driver instance
Returns
NULL - call not successful (PMP driver busy) !NULL - address of the display driver queue command
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5.1.5.10.2.7.1.14 GFX_DRV_S1D13517_SetReg Function
C
uint16_t GFX_DRV_S1D13517_SetReg(
uint8_t index,
uint8_t value
);
Description
none
Parameters
Parameters Description
index register number
value value to write to register
Returns
1 - call was not passed 0 - call was passed
5.1.5.10.2.7.1.15 GFX_DRV_S1D13517_Tasks Function
C
void GFX_DRV_S1D13517_Tasks();
5.1.5.10.2.7.2 S1D13517 Data Types and Constants
Structures
Name Description
GFX_DRV_S1D13517_COMMAND Structure for the commands in the driver queue.
LAYER_REGISTERS This structure is used to describe layer registers.
Description
5.1.5.10.2.7.2.1 GFX_DRV_S1D13517_COMMAND Structure
C
typedef struct {
uint8_t instance;
short x;
short y;
uint16_t * array;
uint16_t data;
uint16_t count;
uint16_t lineCount;
uint8_t task;
} GFX_DRV_S1D13517_COMMAND;
Description
Structure: GFX_DRV_S1D13517_COMMAND
None
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5.1.5.10.2.7.2.2 LAYER_REGISTERS Structure
C
typedef struct {
uint8_t XStart;
uint8_t XEnd;
uint8_t YStart0;
uint8_t YStart1;
uint8_t YEnd0;
uint8_t YEnd1;
uint8_t StartAddress0;
uint8_t StartAddress1;
uint8_t StartAddress2;
} LAYER_REGISTERS;
Description
This structure is used to describe layer registers.
5.1.5.10.2.8 Files
Files
Name Description
5.1.5.10.2.8.1 drv_gfx_s1d13517_config_template.h
• Module for Microchip Graphics Library
• This file contains compile time options for the Graphics Library.
*******************************************************************
• FileName: GraphicsConfig.h
• Dependencies: none
• Processor: PIC24F, PIC24H, dsPIC, PIC32
• Compiler: C30 V3.00/C32
• Company: Microchip Technology, Inc.
*
• Software License Agreement
*
• Copyright © 2008 Microchip Technology Inc. All rights reserved.
• Microchip licenses to you the right to use, modify, copy and distribute
• Software only when embedded on a Microchip microcontroller or digital
• signal controller, which is integrated into your product or third party
• product (pursuant to the sublicense terms in the accompanying license
• agreement).
*
• You should refer to the license agreement accompanying this Software
• for additional information regarding your rights and obligations.
*
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• SOFTWARE AND DOCUMENTATION ARE PROVIDED ?AS IS? WITHOUT WARRANTY OF ANY
• KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY
• OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
• PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
• OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION,
• BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
• DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL,
• INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
• COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY
• CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
• OR OTHER SIMILAR COSTS.
*
• Author Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
• Anton Alkhimenok 10/28/2007 Initial Version
• Pradeep Budagutta 10/28/2007 Display related defines
• moved to DisplayConfig.h
5.1.5.10.3 SSD1926 Graphics Controller Driver Library
5.1.5.10.3.1 Introduction
SSD1926 Graphics Controller Driver Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the SSD1926 Graphics Controller Driver Library that is available on the Microchip
family of microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module
without the necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller
variant to another.
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
5.1.5.10.3.2 Release Notes
MPLAB Harmony Version: v0.70b SSD1926 Graphics Controller Driver Library Version : 4.00b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
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5.1.5.10.3.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.5.10.3.4 Using the Library
This topic describes the basic architecture of the SSD1926 Graphics Controller Driver Library and provides information and
examples on how to use it.
Interface Header File: drv_gfx_ssd1926.h
The interface to the SSD1926 Graphics Controller Driver Library is defined in the "drv_gfx_ssd1926.h" header file. This file is
included by the "gfx_primitive.h" file. Any C language source (.c) file that uses the SSD1926 Graphics Controller Driver Library
should include "gfx_primitive.h".
Library File:
The SSD1926 Graphics Controller Driver Library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the SSD1926 Graphics Controller Driver Library interacts with the
framework.
5.1.5.10.3.4.1 Abstraction Model
This library provides the low-level abstraction of the SSD1926 Graphics Controller Driver module of the Microchip family of
graphic display controllers with a convenient C language interface. This topic describes how that abstraction is modeled in the
software and introduces the library interface.
Description
SSD1926 Graphics Controller Driver Abstraction Block Diagram
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
5.1.5.10.3.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the SSD1926 Graphics Controller Driver module.
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Library Interface Section Description
Functions This section lists the API functions available in the library.
5.1.5.10.3.5 Configuring the Library
The configuration of the SSD1926 Graphics Controller Driver is based on the file system_config.h.
This header file contains the configuration selection for the SSD1926 Graphics Controller Driver. Based on the selections made,
the SSD1926 Graphics Controller Driver will support or not support selected features. These configuration settings will apply to
all instances of the SSD1926 Graphics Controller Driver.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.1.5.10.3.6 Building the Library
This section list the files that are available in the \src of the SSD1926 Graphics Controller Driver Library. It lists which files need
to be included in the build based on either a hardware feature present on the board or configuration option selected by the
system.
• drv_gfx_ssd1926.c
5.1.5.10.3.7 Library Interface
This section describes the Application Programming Interface (API) functions of the SSD1926 Graphics Controller Driver Library.
Refer to each section for a detailed description.
5.1.5.10.3.7.1 Functions
Functions
Name Description
GFX_DRV_SSD1926_BarFill Hardware accelerated barfill function
GFX_DRV_SSD1926_BrightnessSet Sets the brightness of the display backlight.
GFX_DRV_SSD1926_Busy Returns non-zero if LCD controller is busy (previous drawing operation is not
completed).
GFX_DRV_SSD1926_Close closes an instance of the graphics controller
GFX_DRV_SSD1926_GetReg returns graphics controller register value (byte access)
GFX_DRV_SSD1926_Initialize resets LCD, initializes PMP
GFX_DRV_SSD1926_Open opens an instance of the graphics controller
GFX_DRV_SSD1926_PixelArrayGet gets an array of pixels of length count starting at *color
GFX_DRV_SSD1926_PixelArrayPut outputs an array of pixels of length count starting at *color
GFX_DRV_SSD1926_PixelPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_SSD1926_PixelsPut outputs one pixel into the frame buffer at the x,y coordinate given
GFX_DRV_SSD1926_SetColor Sets the color for the driver instance
GFX_DRV_SSD1926_SetInstance Sets the instance for the driver
GFX_DRV_SSD1926_SetReg updates graphics controller register value (byte access)
GFX_DRV_SSD1926_Tasks Task machine that renders the driver calls for the graphics library it must be
called peridically to output the contents of its circular buffer
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Description
5.1.5.10.3.7.1.1 GFX_DRV_SSD1926_BarFill Function
C
uint16_t GFX_DRV_SSD1926_BarFill(
short left,
short top,
short right,
short bottom
);
Description
see primitive BarFill
Returns
1 - call not successful (PMP driver busy) 0 - call successful
5.1.5.10.3.7.1.2 GFX_DRV_SSD1926_BrightnessSet Function
C
void GFX_DRV_SSD1926_BrightnessSet(
uint8_t instance,
uint16_t level
);
Description
none
Parameters
Parameters Description
5.1.5.10.3.7.1.3 GFX_DRV_SSD1926_Busy Function
C
uint16_t GFX_DRV_SSD1926_Busy(
uint8_t instance
);
Description
none
Parameters
Parameters Description
instance driver instance
Returns
1 - busy 0 - not busy
5.1.5.10.3.7.1.4 GFX_DRV_SSD1926_Close Function
C
uint16_t GFX_DRV_SSD1926_Close(
uint8_t instance
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);
Description
none
Returns
0 - instance closed 2 - instance doesn't exist 3 - instance already closed
5.1.5.10.3.7.1.5 GFX_DRV_SSD1926_GetReg Function
C
uint8_t GFX_DRV_SSD1926_GetReg(
uint16_t index,
uint8_t * data
);
Description
none
Parameters
Parameters Description
index register number
*data array to store data
Returns
0 - when call was passed
5.1.5.10.3.7.1.6 GFX_DRV_SSD1926_Initialize Function
C
uint16_t GFX_DRV_SSD1926_Initialize(
uint8_t instance
);
Description
none
Parameters
Parameters Description
instance driver instance
Returns
1 - call not successful (PMP driver busy) 0 - call successful
5.1.5.10.3.7.1.7 GFX_DRV_SSD1926_Open Function
C
uint16_t GFX_DRV_SSD1926_Open(
uint8_t instance
);
Description
none
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Returns
1 - driver not initialied 2 - instance doesn't exist 3 - instance already open instance to driver when successful
5.1.5.10.3.7.1.8 GFX_DRV_SSD1926_PixelArrayGet Function
C
uint16_t* GFX_DRV_SSD1926_PixelArrayGet(
uint16_t * color,
short x,
short y,
uint16_t count
);
Description
none
Parameters
Parameters Description
instance driver instance
*color start of the array
x x coordinate of the start point.
y y coordinate of the end point.
count number of pixels
Returns
NULL - call not successful !NULL - address of the display driver queue command
5.1.5.10.3.7.1.9 GFX_DRV_SSD1926_PixelArrayPut Function
C
uint16_t* GFX_DRV_SSD1926_PixelArrayPut(
uint16_t * color,
short x,
short y,
uint16_t count,
uint16_t lineCount
);
Description
none
Parameters
Parameters Description
instance driver instance
*color start of the array
x x coordinate of the start point.
y y coordinate of the end point.
count number of pixels
Returns
NULL - call not successful !NULL - handle to the number of pixels remaining
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5.1.5.10.3.7.1.10 GFX_DRV_SSD1926_PixelPut Function
C
uint16_t GFX_DRV_SSD1926_PixelPut(
short x,
short y
);
Description
none
Parameters
Parameters Description
instance driver instance
color color to output
x,y pixel coordinates
Returns
NULL - call not successful !NULL - address of the display driver queue command
5.1.5.10.3.7.1.11 GFX_DRV_SSD1926_PixelsPut Function
C
uint16_t GFX_DRV_SSD1926_PixelsPut(
short x,
short y,
uint16_t count,
uint16_t lineCount
);
Description
none
Parameters
Parameters Description
x,y pixel coordinates
5.1.5.10.3.7.1.12 GFX_DRV_SSD1926_SetColor Function
C
void GFX_DRV_SSD1926_SetColor(
GFX_COLOR color
);
Returns
none
5.1.5.10.3.7.1.13 GFX_DRV_SSD1926_SetInstance Function
C
void GFX_DRV_SSD1926_SetInstance(
uint8_t instance
);
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Returns
none
5.1.5.10.3.7.1.14 GFX_DRV_SSD1926_SetReg Function
C
uint16_t GFX_DRV_SSD1926_SetReg(
uint16_t index,
uint8_t value
);
Description
none
Parameters
Parameters Description
index register number
value value to write to register
Returns
1 - call was not passed 0 - call was passed
5.1.5.10.3.7.1.15 GFX_DRV_SSD1926_Tasks Function
C
void GFX_DRV_SSD1926_Tasks();
5.1.5.10.3.7.2 Data Types and Constants
Structures
Name Description
GFX_DRV_SSD1926_COMMAND Structure for the commands in the driver queue.
GFX_DRV_SSD1926_TASK Structure for the task machine
Description
5.1.5.10.3.7.2.1 GFX_DRV_SSD1926_COMMAND Structure
C
typedef struct {
uint8_t instance;
uint32_t address;
uint16_t * array;
uint16_t data;
uint16_t count;
uint16_t lineCount;
SSD1926_TASK task;
} GFX_DRV_SSD1926_COMMAND;
Description
Structure: GFX_DRV_SSD1926_COMMAND
None
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Members
Members Description
uint32_t address; wether the task is complete or not
5.1.5.10.3.7.2.2 GFX_DRV_SSD1926_TASK Structure
C
typedef struct {
uint8_t instance;
uint32_t address;
uint16_t color;
uint8_t state;
} GFX_DRV_SSD1926_TASK;
Description
Structure: GFX_DRV_SSD1926_TASK
None
5.1.5.10.3.8 Files
Files
Name Description
5.1.5.10.3.8.1 drv_gfx_ssd1926_config_template.h
• Module for Microchip Graphics Library
• This file contains compile time options for the Graphics Library.
*******************************************************************
• FileName: GraphicsConfig.h
• Dependencies: none
• Processor: PIC24F, PIC24H, dsPIC, PIC32
• Compiler: C30 V3.00/C32
• Company: Microchip Technology, Inc.
*
• Software License Agreement
*
• Copyright © 2008 Microchip Technology Inc. All rights reserved.
• Microchip licenses to you the right to use, modify, copy and distribute
• Software only when embedded on a Microchip microcontroller or digital
• signal controller, which is integrated into your product or third party
• product (pursuant to the sublicense terms in the accompanying license
• agreement).
*
• You should refer to the license agreement accompanying this Software
• for additional information regarding your rights and obligations.
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*
• SOFTWARE AND DOCUMENTATION ARE PROVIDED ?AS IS? WITHOUT WARRANTY OF ANY
• KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY
• OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
• PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
• OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION,
• BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
• DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL,
• INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
• COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY
• CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
• OR OTHER SIMILAR COSTS.
*
• Author Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
• Anton Alkhimenok 10/28/2007 Initial Version
• Pradeep Budagutta 10/28/2007 Display related defines
• moved to DisplayConfig.h
5.1.6 Non-Volatile Memory (NVM) Driver Library
5.1.6.1 Introduction
Non-Volatile Memory (NVM) Driver Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the NVM Driver Library that is available on the Microchip family of microcontrollers
with a convenient C language interface. It can be used to simplify low-level access to the module without the necessity of
interacting directly with the module's registers, thereby hiding differences from one microcontroller variant to another.
Description
The functions provides in the NVM Driver Library also perform certain mandatory assembly language instructions specific for
access and modification of memory, which are thus abstracted.
Memory Devices for PIC Microcontrollers
There are two primary forms of on-chip memory available for PIC microcontrollers: programmable Flash memory and data
EEPROM memory. The access mechanism for both of these types are varied and different techniques are specified for the
same.:
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Flash Program Memory
The Flash program memory is readable, writeable, and erasable during normal operation over the entire operating voltage range.
A read from program memory is executed at one byte/word at a time depending on the width of the data bus.
A write to the program memory is executed in either blocks of specific sizes or a single word depending on the type of processor
used.
An erase is performed in blocks. A bulk erase may be performed from user code depending on the type of processor supporting
the operation.
Writing or erasing program memory will cease instruction fetches until the operation is complete, restricting memory access, and
therefore preventing code execution. This is controlled by an internal programming timer.
There are three processor dependant methods for program memory modification.
• Run-Time Self Programming (RTSP)
• In-Circuit Serial Programming (ICSP)
• EJTAG programming
This section describes the RTSP techniques.
5.1.6.2 Release Notes
MPLAB Harmony Version: v0.70b NVM Driver Library Version : 0.01 Release Date: 18Nov2013
New This Release:
• Internal handling of erase feature for sector write function
Known Issues:
• Not tested by mapping the image to different parts of the memory
5.1.6.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED AS IS MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.1.6.4 Using the Library
This topic describes the basic architecture of the NVM Driver Library and provides information and examples on how to use it.
Interface Header File: drv_nvm.h
The interface to the NVM Driver Library is defined in the "drv_nvm.h" header file. Any C language source (.c) file that uses the
NVM Driver library should include "drv.h".
Library File: The NVM Driver Library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the driver interacts with the framework.
5.1.6.4.1 Abstraction Model
This library provides a low-level abstraction of the NVM module on the Microchip family of microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
Description
NVM Software Abstraction Block Diagram
Note 1: This feature is not available on all devices. Refer to the specific device data sheet to determine availability.
Abstraction Model
The NVM peripheral library provides interface routines to interact with the blocks shown in the diagram.
The Flash Status and Control Logic ensures that the Flash memory is configured appropriately for modification. It also
provides the status of the different operations in progress as well as errors, if any. It also decides if the operation is for Flash
program memory or the special device configuration registers.
The Flash Read/Write block ensures that the user data is written to/read from the program memory holding latches. It provides
a layer of abstraction over the sequence of processor-specific instructions that are required to access this data. Depending on
the processor type either block or Word programming options area available.
5.1.6.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various subsections, each of the sub-sections addresses one of the blocks or the
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overall operation of the NVM module.
Library Interface Section Description
System Functions Provides system module interfaces, device initialization, deinitialization,
reinitialization, tasks and status functions.
Client Core Functions Provides open, close, status and other setup functions.
Client Block Transfer Functions Provides buffered data operation functions available in the core
configuration.
Miscellaneous Functions Provides driver miscellaneous functions related to versions and others.
5.1.6.4.3 How the Library Works
The library provides interfaces to support:
• System Functionality
• Client Functionality
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the modes
supported for your device.
5.1.6.4.3.1 System Initialization
This section provides information for system initialization and reinitialization.
Description
System Initialization and Reinitialization
The system performs the initialization and the reinitialization of the device driver with settings that affect only the instance of the
device that is being initialized or reinitialized. During system initialization each instance of the NVM module would be initialized
with the following configuration settings (either passed dynamically at run time using DRV_NVM_INIT or by using initialization
overrides) that are supported by the specific NVM device hardware:
• Device requested power state: One of the system module power states. For specific details please refer to the Data Types
and Constants section.
• The actual peripheral ID enumerated as the PLIB level module ID (e.g., NVM_ID_0)
• Defining the respective interrupt sources for transmit (TX), receive (RX), and error interrupts
The DRV_NVM_Initialize function returns an object handle of the type SYS_MODULE_OBJ. After this, the object handle
returned by the initialize interface would be used by the other system interfaces, such as DRV_NVM_Reinitialize,
DRV_NVM_Deinitialize, DRV_NVM_Status, and DRV_NVM_Tasks.
Note: The system initialization and the reinitialization settings, only effect the instance of the peripheral that is being initialized or
reinitialized.
The SYS_MODULE_INDEX is passed to the DRV_NVM_Initialize function tol determine which type of memory is selected using:
• DRV_NVM_INDEX_0 - FLASH
Example:
// This code snippet shows an example
// of initializing the NVM Driver.
DRV_NVM_INIT NVMInitData;
SYS_MODULE_OBJ objectHandle;
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NVMInitData.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
NVMInitData.moduleId = NVM_ID_0;
NVMInitData.flashInterruptSource = INT_SOURCE_FLASH_CONTROL;
//usage of DRV_NVM_INDEX_0 indicates usage of flash realted APIs
objectHandle = DRV_NVM_Initialize(DRV_NVM_INDEX_0, (SYS_MODULE_INIT*)NVMInitData);
if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
Tasks Routine
The system will call DRV_NVM_Tasks, from system task service (in a polled environment) or DRV_NVM_Taskswill be called
from the Interrupt Service Routine (ISR) of the NVM.
5.1.6.4.3.2 Client Access Operation
This section provides information for general client operation.
Description
General Client Operation
For the application to start using an instance of the module, it must call the DRV_NVM_Open function. This provides the
configuration required to open the NVM instance for operation. If the driver is deinitialized using the function
DRV_NVM_Deinitialize, the application must call the DRV_NVM_Open function again to set up the instance of the NVM. The
function DRV_NVM_Open need not be called again if the system is reinitialized using the DRV_NVM_Reinitialize function.
For the various options available for I/O INTENT please refer to the Data Types and Constants section.
Example:
DRV_HANDLE handle;
handle = DRV_NVM_Open(DRV_NVM_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if (DRV_HANDLE_INVALID == handle)
{
// Unable to open the driver
}
5.1.6.4.3.3 Client Basic Operation
This section provides information for client basic functionality.
Description
An extremely basic interface for the driver operation is provided through client basic functionality.
The NVM driver provides the word and row programming operations in the basic mode of operation. The type of memory on
which these operations will be performed is provided as an index while initialization.
The SYS_MODULE_INDEX is passed to the DRV_NVM_Initialize function to determine which type of memory is selected using:
• DRV_NVM_INDEX_0 - FLASH
Note: Not all devices support the word/row programming operations. It is the responsibility of the user to determine which
devices support which mode of operation. The memory access method described in this document only refers to Real-Time
Self-Programming (RTSP).
Word Programming Operations
Applications using the NVM word write functionality need to perform the following:
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1. The system should have completed necessary initialization and DRV_NVM_Tasks should either be running in a polled
environment, or in an interrupt environment.
2. Open the driver using DRV_NVM_Open with the necessary intent.
3. Provide the desired mode of operation using the operation mode.
4. Write a word using DRV_NVM_WriteWord.
5. The client will be able to close itself using the DRV_NVM_Close when required.
DRV_HANDLE handle; // Returned from DRV_NVM_Open
char myBuffer[MY_BUFFER_SIZE];
char* nvmAddr = BASE_ADDRESS_OF_NVM_TO_WRITE_TO
DRV_NVM_OPERATION_STATUS myStatus = 0;
myStatus = DRV_NVM_WriteWord( handle, myBuffer, nvmAddr);
if(myStatus == DRV_NVM_STATUS_OPERATION_COMPLETE)
{
//Write successful
}
Applications using the NVM word erase functionality need to perform the following:
1. The system should have completed necessary initialization and DRV_NVM_Tasks should either be running in a polled
environment, or in an interrupt environment.
2. Open the driver using DRV_NVM_Open with the necessary intent.
3. Provide the desired mode of operation using the operation mode.
4. Erase a word using DRV_NVM_EraseWord.
5. The client will be able to close itself using the DRV_NVM_Close when required.
DRV_HANDLE handle; // Returned from DRV_NVM_Open
char* nvmAddr = BASE_ADDRESS_OF_NVM_TO_ERASE_FROM
DRV_NVM_OPERATION_STATUS myStatus = 0;
myStatus = DRV_NVM_EraseWord( handle, myBuffer, nvmAddr);
if(myStatus == DRV_NVM_STATUS_OPERATION_COMPLETE)
{
//Erase successful
}
Row Programming Operations
Applications using the NVM row erase functionality needs to perform the following:
1. The system should have completed necessary initialization and DRV_NVM_Tasks should either be running in a polled
environment, or in an interrupt environment.
2. Open the driver using DRV_NVM_Open with the necessary intent.
3. Provide the desired mode of operation using the operation mode.
4. Erase a word using DRV_NVM_EraseROW.
5. The client will be able to close itself using the DRV_NVM_Close when required.
DRV_HANDLE handle; // Returned from DRV_NVM_Open
char* nvmAddr = BASE_ADDRESS_OF_NVM_TO_ERASE_FROM
DRV_NVM_OPERATION_STATUS myStatus = 0;
myStatus = DRV_NVM_EraseROW( handle, nvmAddr);
if(myStatus == DRV_NVM_STATUS_OPERATION_COMPLETE)
{
//Erase successful
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}
5.1.6.4.3.4 Client Block Data Operation
Client Block Data functionality provides advanced interface for the driver operation.
These block data functions depend heavily on the block sizes and boundaries of individual devices and the APIs are responsible
for keeping that information transparent from the application. These operations return the number of bytes of a successfully
executed operation.
Block Operations
Applications using the NVM block write functionality need to perform the following:
1. The system should have completed necessary initialization and DRV_NVM_Tasks should either be running in a polled
environment, or in an interrupt environment.
2. Open the driver using DRV_NVM_Open with the necessary intent.
3. Provide the desired mode of operation using the operation mode.
4. Provide the source and destination addresses and begin write using DRV_NVM_Write.
5. The client will be able to close itself using the DRV_NVM_Close when required.
DRV_HANDLE handle; // Returned from DRV_NVM_Open
char myBuffer[2 * DRV_NVM_ROW_SIZE];
// Destination address should be row aligned.
char *destAddress = (char *)NVM_BASE_ADDRESS_TO_WRITE;
unsigned int count = 2 * MY_BUFFER_SIZE;
DRV_NVM_BUFFER_HANDLE bufferHandle;
bufferHandle = DRV_NVM_Write(myNVMHandle, destAddress, &myBuffer[total], count);
if(DRV_NVM_BUFFER_HANDLE_INVALID == bufferHandle)
{
// Do error handling here
}
// Wait till the buffer completes. This should not
// be a while loop if a part of cooperative multi-tasking
// routine. In that case, it should be invoked in task
// state machine.
while(DRV_NVM_BufferStatus(bufferHandle) != DRV_NVM_BUFFER_COMPLETED);
Applications using the NVM block Read functionality need to perform the following:
1. The system should have completed necessary initialization and DRV_NVM_Tasks should either be running in a polled
environment, or in an interrupt environment.
2. Open the driver using DRV_NVM_Open with the necessary intent.
3. Provide the desired mode of operation using the operation mode.
4. Provide the source and destination addresses and begin write using DRV_NVM_ReadBlock.
5. The client will be able to close itself using the DRV_NVM_Close when required.
DRV_HANDLE handle; // Returned from DRV_NVM_Open
char myBuffer[MY_BUFFER_SIZE];
char *srcAddress = NVM_BASE_ADDRESS_TO_READ_FROM;
unsigned int count = MY_BUFFER_SIZE;
DRV_NVM_BUFFER_HANDLE bufferHandle;
bufferHandle = DRV_NVM_Read(myNVMHandle, &myBuffer[total], srcAddress, count);
if(DRV_NVM_BUFFER_HANDLE_INVALID == bufferHandle)
{
// Do error handling here
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}
// Wait till the buffer completes. This should not
// be a while loop if a part of cooperative multi-tasking
// routine. In that case, it should be invoked in task
// state machine.
while(DRV_NVM_BufferStatus(bufferHandle) != DRV_NVM_BUFFER_COMPLETED);
Internally, a buffer is maintained whose status can be obtained by calling API DRV_NVM_BufferStatus.
5.1.6.5 Configuring the Library
Macros
Name Description
DRV_NVM_BUFFER_OBJECT_NUMBER Selects the maximum number of buffer objects
DRV_NVM_CLIENTS_NUMBER Selects the maximum number of clients
DRV_NVM_ERASE_SIZE Specifies the NVM Driver Erase Page Size in bytes.
DRV_NVM_INSTANCES_NUMBER Selects the maximum number of Driver instances that can be
supported by the dynamic driver.
DRV_NVM_INTERRUPT_MODE Macro specifies operation of the driver to be in the interrupt mode or
polled mode
DRV_NVM_ROW_SIZE Specifies the NVM Driver Program Row Size in bytes.
DRV_NVM_UNLOCK_KEY1 Specifies the NVM Driver Program Unlock Key 1
DRV_NVM_UNLOCK_KEY2 Specifies the NVM Driver Program Unlock Key 2
Description
The configuration of the NVM Driver is based on the file sys_config.h
This header file contains the configuration selection for the NVM Driver. Based on the selections made, the NVM Driver will
support or not support selected features. These configuration settings will apply to all instances of the NVM Driver.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.1.6.5.1 DRV_NVM_BUFFER_OBJECT_NUMBER Macro
C
#define DRV_NVM_BUFFER_OBJECT_NUMBER 5
Description
NVM Driver maximum number of buffer objects
This definition selects the maximum number of buffer objects. This indirectly also specifies the queue depth. The NVM Driver can
queue up DRV_NVM_BUFFER_OBJECT_NUMBER of read/write/erase requests before return a
DRV_NVM_BUFFER_HANDLE_INVALID due to the queue being full. Increasing this number increases the RAM requirement of
the driver.
Remarks
None.
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5.1.6.5.2 DRV_NVM_CLIENTS_NUMBER Macro
C
#define DRV_NVM_CLIENTS_NUMBER 1
Description
NVM maximum number of clients
This definition selects the maximum number of clients that the NVM driver can supported at run time.
Remarks
None.
5.1.6.5.3 DRV_NVM_ERASE_SIZE Macro
C
#define DRV_NVM_ERASE_SIZE 4096
Description
NVM Driver Erase Page Size.
This definition specifies the NVM Driver Erase Page Size in bytes. This parameter is device specific and should be obtained from
the device specific data sheet. The Erase Page Size is the minimum block size that can be erased in one erase operation.
Remarks
None.
5.1.6.5.4 DRV_NVM_INSTANCES_NUMBER Macro
C
#define DRV_NVM_INSTANCES_NUMBER 1
Description
NVM Driver instance configuration
This definition selects the maximum number of Driver instances that can be supported by the dynamic driver. In case of this
driver, multiple instances of the driver could use the same hardware instance.
Remarks
None
5.1.6.5.5 DRV_NVM_INTERRUPT_MODE Macro
C
#define DRV_NVM_INTERRUPT_MODE false
Description
NVM interrupt and polled mode operation control
This macro specifies operation of the driver to be in the interrupt mode or polled mode
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• true - Select if interrupt mode of NVM operation is desired
• false - Select if polling mode of NVM operation is desired
Not defining this option to true or false will result in build error.
Remarks
None.
5.1.6.5.6 DRV_NVM_ROW_SIZE Macro
C
#define DRV_NVM_ROW_SIZE 512
Description
NVM Driver Program Row Size.
This definition specifies the NVM Driver Program Row Size in bytes. This parameter is device specific and should be obtained
from the device specific data sheet. The Program Row Size is the minimum block size that can be programmed in one program
operation.
Remarks
None.
5.1.6.5.7 DRV_NVM_UNLOCK_KEY1 Macro
C
#define DRV_NVM_UNLOCK_KEY1 0xAA996655
Description
NVM Driver Program Unlock Key 1
This definition specifies the NVM Driver Program Unlock Key 1 parameter is device specific and should be obtained from the
device specific data sheet.
Remarks
None.
5.1.6.5.8 DRV_NVM_UNLOCK_KEY2 Macro
C
#define DRV_NVM_UNLOCK_KEY2 0x556699AA
Description
NVM Driver Program Unlock Key 2
This definition specifies the NVM Driver Program Unlock Key 2 parameter is device specific and should be obtained from the
device specific data sheet.
Remarks
None.
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5.1.6.6 Building the Library
This section list the files that are available in the \src of the NVM driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.1.6.7 Library Interface
Data Types and Constants
Name Description
DRV_NVM_BUFFER_HANDLE_INVALID This value defines the NVM Driver Buffer Invalid handle.
DRV_NVM_INDEX_0 NVM driver index definitions
DRV_NVM_INDEX_COUNT Number of valid NVM driver indices
DRV_NVM_BUFFER_HANDLE This type defines the NVM Driver Buffer handle.
DRV_NVM_BUFFER_STATUS Specifies the status of the buffer for the read, write and erase
opeartions.
DRV_NVM_CLIENT_STATUS Defines the client status
DRV_NVM_INIT Defines the data required to initialize or reinitialize the NVM driver
DRV_NVM_INDEX_1 This is macro DRV_NVM_INDEX_1.
Client Block Data Functions
Name Description
DRV_NVM_Erase Erase the specified number of pages in flash memory.
DRV_NVM_Read Reads a block of data from the specified address in memory.
DRV_NVM_Tasks Maintains the driver's erase and write state machine and implements its ISR.
DRV_NVM_Write Write a block of data to a specified address in memory.
Client Core Functions
Name Description
DRV_NVM_ClientStatus Gets current client-specific status the NVM driver
DRV_NVM_Close Closes an opened-instance of the NVM driver
DRV_NVM_Open Opens the specified timer driver instance and returns a handle to it
Miscellaneous Functions
Name Description
DRV_NVM_BufferStatus Gets the current status of the buffer.
System Functions
Name Description
DRV_NVM_Deinitialize Deinitializes the specified instance of the NVM driver module
DRV_NVM_Initialize Initializes the NVM instance for the specified driver index
DRV_NVM_Status Gets the current status of the NVM driver module.
Description
This section describes the Application Programming Interface (API) functions of the NVM Driver Library.
Refer to each section for a detailed description.
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5.1.6.7.1 System Functions
5.1.6.7.1.1 DRV_NVM_Deinitialize Function
C
void DRV_NVM_Deinitialize(
SYS_MODULE_OBJ object
);
Description
Deinitializes the specified instance of the NVM driver module, disabling its operation (and any hardware). Invalidates all the
internal data.
Preconditions
Function DRV_NVM_Initialize should have been called before calling this function.
Parameters
Parameters Description
object Driver object handle, returned from the DRV_NVM_Initialize routine
Returns
None.
Remarks
Once the Initialize operation has been called, the Deinitialize operation must be called before the Initialize operation can be
called again.
This routine will NEVER block waiting for hardware. If the operation requires time to allow the hardware to complete, this will be
reported by the DRV_NVM_Status operation. The system has to use DRV_NVM_Status to find out when the module is in the
ready state.
Example
// This code snippet shows an example
// of deinitializng the driver.
SYS_MODULE_OBJ object; // Returned from DRV_NVM_Initialize
SYS_STATUS status;
DRV_NVM_Deinitialize(object);
status = DRV_NVM_Status(object);
if (SYS_MODULE_DEINITIALIZED != status)
{
// Check again later if you need to know
// when the driver is deinitialized.
}
5.1.6.7.1.2 DRV_NVM_Initialize Function
C
SYS_MODULE_OBJ DRV_NVM_Initialize(
const SYS_MODULE_INDEX index,
const SYS_MODULE_INIT * const init
);
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Description
This routine initializes the NVM driver instance for the specified driver index, making it ready for clients to open and use it.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the instance to be initialized also the type of memory used
init Pointer to a data structure containing any data necessary to initialize the driver.
Returns
If successful, returns a valid handle to a driver instance object. Otherwise, it returns SYS_MODULE_OBJ_INVALID.
Remarks
This routine must be called before any other NVM routine is called.
This routine should only be called once during system initialization unless DRV_NVM_Deinitialize is called to de-initialize the
driver instance.
This routine will NEVER block for hardware access. If the operation requires time to allow the hardware to re-initialize, it will be
reported by the DRV_NVM_Status operation. The system must use DRV_NVM_Status to find out when the driver is in the ready
state.
Build configuration options may be used to staticaly override options in the "init" sructure and will take precedance over
initialization data passed using this routine.
Example
// This code snippet shows an example
// of initializing the NVM Driver.
DRV_NVM_INIT NVMInitData;
SYS_MODULE_OBJ objectHandle;
NVMInitData.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
NVMInitData.moduleId = NVM_ID_0;
NVMInitData.flashInterruptSource = INT_SOURCE_FLASH_CONTROL;
//usage of DRV_NVM_INDEX_0 indicates usage of flash realted APIs
objectHandle = DRV_NVM_Initialize(DRV_NVM_INDEX_0, (SYS_MODULE_INIT*)NVMInitData);
if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
5.1.6.7.1.3 DRV_NVM_Status Function
C
SYS_STATUS DRV_NVM_Status(
SYS_MODULE_OBJ object
);
Description
This routine provides the current status of the NVM driver module.
Preconditions
Function DRV_NVM_Initialize should have been called before calling this function.
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Parameters
Parameters Description
object Driver object handle, returned from the DRV_NVM_Initialize routine
Returns
SYS_STATUS_READY - Indicates that the driver is ready and accept requests for new operations.
Note Any value greater than SYS_STATUS_READY is also a normal running state in which the driver is ready to accept new
operations.
SYS_STATUS_BUSY - Indicates that the driver is busy with a previous system level operation and cannot start another
SYS_STATUS_ERROR - Indicates that the driver is in an error state
Remarks
Any value less than SYS_STATUS_ERROR is also an error state.
SYS_MODULE_DEINITIALIZED - Indicates that the driver has been de-initialized
This value is less than SYS_STATUS_ERROR
The this operation can be used to determine when any of the driver's module level operations has completed.
If the status operation returns SYS_STATUS_BUSY, the a previous operation has not yet completed. Once the status operation
returns SYS_STATUS_READY, any previous operations have completed.
The value of SYS_STATUS_ERROR is negative (-1). Any value less than that is also an error state.
This routine will NEVER block waiting for hardware.
If the Status operation returns an error value, the error may be cleared by calling the reinitialize operation. If that fails, the
deinitialize operation will need to be called, followed by the initialize operation to return to normal operations.
Example
SYS_MODULE_OBJ object; // Returned from DRV_NVM_Initialize
SYS_STATUS NVMStatus;
NVMStatus = DRV_NVM _Status(object);
else if (SYS_STATUS_ERROR >= NVMStatus)
{
// Handle error
}
5.1.6.7.2 Client Core Functions
5.1.6.7.2.1 DRV_NVM_ClientStatus Function
C
DRV_NVM_CLIENT_STATUS DRV_NVM_ClientStatus(
const DRV_HANDLE handle
);
Description
This routine gets the client-specfic status of the NVM driver associated with the given handle.
Preconditions
The DRV_NVM_Initialize routine must have been called.
DRV_NVM_Open must have been called to obtain a valid opened device handle.
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Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
A DRV_NVM_CLIENT_STATUS value describing the current status of the driver
Remarks
This routine will not block for hardware access and will immediately return the current status.
Example
DRV_HANDLE handle; // Returned from DRV_NVM_Open
DRV_NVM_CLIENT_STATUS clientStatus;
clientStatus = DRV_NVM_ClientStatus(handle);
if(DRV_NVM_CLIENT_STATUS_ERROR >= clientStatus)
{
// Handle the error
}
5.1.6.7.2.2 DRV_NVM_Close Function
C
void DRV_NVM_Close(
const DRV_HANDLE handle
);
Description
This routine closes an opened-instance of the NVM driver, invalidating the handle.
Preconditions
The DRV_NVM_Initialize routine must have been called for the specified NVM driver instance.
DRV_NVM_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
None
Remarks
After calling this routine, the handle passed in "handle" must not be used with any of the remaining driver routines. A new handle
must be obtained by calling DRV_NVM_Open before the caller may use the driver again.
If DRV_IO_INTENT_BLOCKING was requested and the driver was built appropriately to support blocking behavior call may
block until the operation is complete.
If DRV_IO_INTENT_NON_BLOCKING request the driver client can call the DRV_NVM_Status operation to find out when the
module is in the ready state (the handle is no longer valid).
Usually there is no need for the driver client to verify that the Close operation has completed.
Example
DRV_HANDLE handle; // Returned from DRV_NVM_Open
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DRV_NVM_Close(handle);
5.1.6.7.2.3 DRV_NVM_Open Function
C
DRV_HANDLE DRV_NVM_Open(
const SYS_MODULE_INDEX index,
const DRV_IO_INTENT ioIntent
);
Description
This routine opens the specified NVM driver instance and provides a handle that must be provided to all other client-level
operations to identify the caller and the instance of the driver.
Preconditions
Function DRV_NVM_Initialize must have been called before calling this function.
Parameters
Parameters Description
drvIndex Identifier for the object instance to be opened
intent Zero or more of the values from the enumeration DRV_IO_INTENT "or'd" together
to indicate the intended use of the driver
Returns
If successful, the routine returns a valid open-instance handle (a number identifying both the caller and the module instance).
If an error occurs, the return value is DRV_HANDLE_INVALID.
Remarks
The handle returned is valid until the DRV_NVM_Close routine is called.
This routine will NEVER block waiting for hardware.
If the DRV_IO_INTENT_BLOCKING is requested and the driver was built appropriately to support blocking behavior, then other
client-level operations may block waiting on hardware until they are complete.
If DRV_IO_INTENT_NON_BLOCKING is requested the driver client can call the DRV_NVM_ClientStatus operation to find out
when the module is in the ready state.
If the requested intent flags are not supported, the routine will return DRV_HANDLE_INVALID.
Example
DRV_HANDLE handle;
handle = DRV_NVM_Open(DRV_NVM_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if (DRV_HANDLE_INVALID == handle)
{
// Unable to open the driver
}
5.1.6.7.3 Client Block Data Functions
5.1.6.7.3.1 DRV_NVM_Erase Function
C
DRV_NVM_BUFFER_HANDLE DRV_NVM_Erase(
const DRV_HANDLE handle,
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uint8_t * targetbuffer,
const unsigned int numbytes
);
Description
This routine erases the specified number of pages in flash memory. It returns a buffer handle that can be queried by the
DRV_NVM_BufferStatus() function to check for completion of the operation. The target address should be aligned on a
DRV_NVM_PAGE_SIZE byte boundary. The number of bytes to write should be equal to or should be multiples of
DRV_NVM_PAGE_SIZE.
Preconditions
The DRV_NVM_Initialize routine must have been called for the specified NVM driver instance.
DRV_NVM_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_READ or DRV_IO_INTENT_READWRITE must have been specified in the DRV_NVM_Open call.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
targetBuffer Start address in NVM memory from where the erase should begin. Should be
aligned on a DRV_NVM_PAGE_SIZE byte boundary.
numbytes Total number of pages to be erased expressed in bytes. This should be equal to or
a multiple of DRV_NVM_PAGE_SIZE.
Returns
DRV_NVM_BUFFER_HANDLE_INVALID in case the operation was not successful. A valid handle otherwise.
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_NVM_Open routine and the driver was built to support
blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_NVM_Open routine or the driver was built to only
support non-blocking behavior the call will return immediately.
Example
// Returned from DRV_NVM_Open
DRV_HANDLE handle;
// Destination address should be row aligned.
char *destAddress = (char *)NVM_BASE_ADDRESS_TO_ERASE;
unsigned int count = 2 * DRV_NVM_PAGE_SIZE;
DRV_NVM_BUFFER_HANDLE bufferHandle;
bufferHandle = DRV_NVM_Write(myNVMHandle, destAddress, count);
if(DRV_NVM_BUFFER_HANDLE_INVALID == bufferHandle)
{
// Do error handling here
}
// Wait till the buffer completes. This should not
// be a while loop if a part of cooperative multi-tasking
// routine. In that case, it should be invoked in task
// state machine.
while(DRV_NVM_BufferStatus(bufferHandle) != DRV_NVM_BUFFER_COMPLETED);
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5.1.6.7.3.2 DRV_NVM_Read Function
C
DRV_NVM_BUFFER_HANDLE DRV_NVM_Read(
const DRV_HANDLE handle,
uint8_t * targetBuffer,
uint8_t * srcAddress,
const unsigned int numbytes
);
Description
This routine reads a block of data from the specified address in memory. It returns a buffer handle that can be queried by the
DRV_NVM_BufferStatus() function to check for completion of the operation.
Preconditions
The DRV_NVM_Initialize routine must have been called for the specified NVM driver instance.
DRV_NVM_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_READ or DRV_IO_INTENT_READWRITE must have been specified in the DRV_NVM_Open call.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
targetBuffer Buffer into which the data read from the NVM instance will be placed.
srcAddress The base address in NVM memory from data read should begin
numbytes Total number of bytes that need to be read from the module instance (must be
equal to or less than the size of the buffer)
Returns
DRV_NVM_BUFFER_HANDLE_INVALID in case the operation was not successful. A valid handle otherwise.
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_NVM_Open routine and the driver was built to support
blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_NVM_Open routine or the driver was built to only
support non-blocking behavior the call will return immediately, identifying how many bytes of data were actually copied into the
client's buffer and the client must call DRV_NVM_Read again with adjusted parameters as shown in the example.
Example
DRV_HANDLE handle; // Returned from DRV_NVM_Open
char myBuffer[MY_BUFFER_SIZE];
char *srcAddress = NVM_BASE_ADDRESS_TO_READ_FROM;
unsigned int count = MY_BUFFER_SIZE;
DRV_NVM_BUFFER_HANDLE bufferHandle;
bufferHandle = DRV_NVM_Read(myNVMHandle, &myBuffer[total], srcAddress, count);
if(DRV_NVM_BUFFER_HANDLE_INVALID == bufferHandle)
{
// Do error handling here
}
// Wait till the buffer completes. This should not
// be a while loop if a part of cooperative multi-tasking
// routine. In that case, it should be invoked in task
// state machine.
while(DRV_NVM_BufferStatus(bufferHandle) != DRV_NVM_BUFFER_COMPLETED);
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5.1.6.7.3.3 DRV_NVM_Tasks Function
C
void DRV_NVM_Tasks(
SYS_MODULE_OBJ object
);
Description
This routine is used to maintain the driver's internal write and erase state machine and implement its ISR for interrupt-driven
implementations.
Preconditions
The DRV_NVM_Initialize routine must have been called for the specified NVM driver instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from DRV_NVM_Initialize)
Returns
None.
Remarks
This routine is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
apropriate raw ISR.
This routine may excute in an ISR context and will never block or access any resources that may cause it to block.
Example
SYS_MODULE_OBJ object; // Returned from DRV_NVM_Initialize
while (true)
{
DRV_NVM_Tasks (object);
// Do other tasks
}
5.1.6.7.3.4 DRV_NVM_Write Function
C
DRV_NVM_BUFFER_HANDLE DRV_NVM_Write(
DRV_HANDLE handle,
uint8_t * destination,
uint8_t * source,
const unsigned int nBytes
);
Description
This routine writes a block of data to a specified address in memory. It returns a buffer handle that can be queried by the
DRV_NVM_BufferStatus() function to check for completion of the operation. The contents of the source buffer should not be
changed while the operation is in progress. The target address should be aligned on a DRV_NVM_ROW_SIZE byte boundary.
The number of bytes to write should be equal to or should be multiples of DRV_NVM_ROW_SIZE.
Preconditions
The DRV_NVM_Initialize routine must have been called for the specified NVM driver instance.
DRV_NVM_Open must have been called to obtain a valid opened device handle.
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DRV_IO_INTENT_READ or DRV_IO_INTENT_READWRITE must have been specified in the DRV_NVM_Open call.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
targetBuffer Buffer in NVM memory where the data from srcAddress will be placed. Should be
aligned on a DRV_NVM_ROW_SIZE byte boundary.
srcAddress The source buffer containing data to programmed into NVM
numbytes Total number of bytes that need to be written to the NVM. This should be equal to
or a multiple of DRV_NVM_ROW_SIZE.
Returns
DRV_NVM_BUFFER_HANDLE_INVALID in case the operation was not successful. A valid handle otherwise.
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_NVM_Open routine and the driver was built to support
blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_NVM_Open routine or the driver was built to only
support non-blocking behavior the call will return immediately.
Example
DRV_HANDLE handle; // Returned from DRV_NVM_Open
char myBuffer[2 * DRV_NVM_ROW_SIZE];
// Destination address should be row aligned.
char *destAddress = (char *)NVM_BASE_ADDRESS_TO_WRITE;
unsigned int count = 2 * MY_BUFFER_SIZE;
DRV_NVM_BUFFER_HANDLE bufferHandle;
bufferHandle = DRV_NVM_Write(myNVMHandle, destAddress, &myBuffer[total], count);
if(DRV_NVM_BUFFER_HANDLE_INVALID == bufferHandle)
{
// Do error handling here
}
// Wait till the buffer completes. This should not
// be a while loop if a part of cooperative multi-tasking
// routine. In that case, it should be invoked in task
// state machine.
while(DRV_NVM_BufferStatus(bufferHandle) != DRV_NVM_BUFFER_COMPLETED);
5.1.6.7.4 Client Basic Functions
5.1.6.7.5 Miscellaneous Functions
5.1.6.7.5.1 DRV_NVM_BufferStatus Function
C
DRV_NVM_BUFFER_STATUS DRV_NVM_BufferStatus(
DRV_HANDLE handle,
const DRV_HANDLE bufferHandle
);
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Description
This routine gets the current status of the buffer. The application must use this routine in case a polling based implementation is
desired.
Preconditions
The DRV_NVM_Initialize routine must have been called.
DRV_NVM_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
A DRV_NVM_BUFFER_STATUS value describing the current status of the buffer
Remarks
This routine will not block for hardware access and will immediately return the current status.
Example
DRV_HANDLE handle; // Returned from DRV_NVM_Open
DRV_HANDLE bufferHandle;
DRV_NVM_BUFFER_STATUS status;
status = DRV_NVM_BufferStatus(handle, bufferHandle);
if(status == DRV_NVM_BUFFER_COMPLETED)
{
// Operation Done
}
5.1.6.7.6 Data Types and Constants
5.1.6.7.6.1 DRV_NVM_BUFFER_HANDLE_INVALID Macro
C
#define DRV_NVM_BUFFER_HANDLE_INVALID
Description
NVM Driver Buffer Invalid Handle
This value defines the NVM Driver Buffer Invalid handle. This value is returned by read/write/erase routines when the desired
operation could not be completed.
Remarks
None.
5.1.6.7.6.2 DRV_NVM_INDEX_0 Macro
C
#define DRV_NVM_INDEX_0 0
Description
Driver NVM Module Index reference
These constants provide NVM driver index definitions.
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Remarks
These constants should be used in place of hard-coded numeric literals.
These values should be passed into the DRV_NVM_Initialize and DRV_NVM_Open routines to identify the driver instance in use.
5.1.6.7.6.3 DRV_NVM_INDEX_COUNT Macro
C
#define DRV_NVM_INDEX_COUNT 1
Description
NVM Driver Module Index Count
This constant identifies NVM driver index definitions.
Remarks
This constant should be used in place of hard-coded numeric literals. This value is part-specific.
5.1.6.7.6.4 DRV_NVM_BUFFER_HANDLE Type
C
typedef uintptr_t DRV_NVM_BUFFER_HANDLE;
Description
NVM Driver Buffer Handle
This type defines the NVM Driver Buffer handle.
Remarks
None.
5.1.6.7.6.5 DRV_NVM_BUFFER_STATUS Enumeration
C
typedef enum {
DRV_NVM_BUFFER_COMPLETED = 0,
DRV_NVM_BUFFER_QUEUED = 1,
DRV_NVM_BUFFER_IN_PROGRESS = 2,
DRV_NVM_BUFFER_ERROR_UNKNOWN = -1
} DRV_NVM_BUFFER_STATUS;
Description
NVM Driver Buffer Status
This type specifies the status of the buffer for the read, write and erase opeartions.
Members
Members Description
DRV_NVM_BUFFER_COMPLETED = 0 Done OK and ready
DRV_NVM_BUFFER_QUEUED = 1 Scheduled but not started
DRV_NVM_BUFFER_IN_PROGRESS = 2 Currently being in transfer
DRV_NVM_BUFFER_ERROR_UNKNOWN
= -1
Unknown buffer
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Remarks
None.
5.1.6.7.6.6 DRV_NVM_CLIENT_STATUS Enumeration
C
typedef enum {
DRV_NVM_CLIENT_STATUS_READY,
DRV_NVM_CLIENT_STATUS_BUSY,
DRV_NVM_WRITE_TERMINATED,
DRV_NVM_ERASE_TERMINATED,
DRV_NVM_LOW_VOLTAGE_ERROR,
DRV_NVM_LOW_VOLTAGE_DETECT_ERROR,
DRV_NVM_STATUS_INVALID
} DRV_NVM_CLIENT_STATUS;
Description
NVM Client Status
Defines the various client status codes.
Members
Members Description
DRV_NVM_CLIENT_STATUS_READY Up and running, ready to start new operations
DRV_NVM_CLIENT_STATUS_BUSY Operation in progress, unable to start a new one
DRV_NVM_WRITE_TERMINATED Write operation terminated Occured
DRV_NVM_ERASE_TERMINATED Erase operation terminated Occured
DRV_NVM_LOW_VOLTAGE_ERROR Low voltage Error
DRV_NVM_LOW_VOLTAGE_DETECT_ERROR Low voltage Error
DRV_NVM_STATUS_INVALID Client Invalid
Remarks
None
5.1.6.7.6.7 DRV_NVM_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
NVM_MODULE_ID nvmID;
INT_SOURCE interruptSource;
} DRV_NVM_INIT;
Description
NVM Driver Initialization Data
This data type defines the data required to initialize or reinitialize the NVM driver.
Members
Members Description
SYS_MODULE_INIT moduleInit; System module initialization
NVM_MODULE_ID nvmID; Identifies NVM hardware module (PLIB-level) ID
INT_SOURCE interruptSource; Interrupt Source for Write Interrupt
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Remarks
Not all the init features are available for all the microcontrollers
5.1.6.7.6.8 DRV_NVM_INDEX_1 Macro
C
#define DRV_NVM_INDEX_1 1
Description
This is macro DRV_NVM_INDEX_1.
5.1.6.8 Files
Files
Name Description
drv_nvm.h NVM Driver Interface Definition
drv_nvm_config_template.h NVM driver configuration definitions template
Description
5.1.6.8.1 drv_nvm.h
NVM Driver Interface Definition
The NVM device driver provides a simple interface to manage the NVM modules on Microchip microcontrollers. This file defines
the interface definition for the NVM driver.
Enumerations
Name Description
DRV_NVM_BUFFER_STATUS Specifies the status of the buffer for the read, write and erase opeartions.
DRV_NVM_CLIENT_STATUS Defines the client status
Functions
Name Description
DRV_NVM_BufferStatus Gets the current status of the buffer.
DRV_NVM_ClientStatus Gets current client-specific status the NVM driver
DRV_NVM_Close Closes an opened-instance of the NVM driver
DRV_NVM_Deinitialize Deinitializes the specified instance of the NVM driver module
DRV_NVM_Erase Erase the specified number of pages in flash memory.
DRV_NVM_Initialize Initializes the NVM instance for the specified driver index
DRV_NVM_Open Opens the specified timer driver instance and returns a handle to it
DRV_NVM_Read Reads a block of data from the specified address in memory.
DRV_NVM_Status Gets the current status of the NVM driver module.
DRV_NVM_Tasks Maintains the driver's erase and write state machine and implements its ISR.
DRV_NVM_Write Write a block of data to a specified address in memory.
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Macros
Name Description
DRV_NVM_BUFFER_HANDLE_INVALID This value defines the NVM Driver Buffer Invalid handle.
DRV_NVM_INDEX_0 NVM driver index definitions
DRV_NVM_INDEX_1 This is macro DRV_NVM_INDEX_1.
DRV_NVM_INDEX_COUNT Number of valid NVM driver indices
Structures
Name Description
DRV_NVM_INIT Defines the data required to initialize or reinitialize the NVM driver
Types
Name Description
DRV_NVM_BUFFER_HANDLE This type defines the NVM Driver Buffer handle.
File Name
drv_nvm.h
Company
Microchip Technology Incorported
5.1.6.8.2 drv_nvm_config_template.h
NVM Driver Configuration Definitions for the template version
These definitions statically define the driver's mode of operation.
Macros
Name Description
DRV_NVM_BUFFER_OBJECT_NUMBER Selects the maximum number of buffer objects
DRV_NVM_CLIENTS_NUMBER Selects the maximum number of clients
DRV_NVM_ERASE_SIZE Specifies the NVM Driver Erase Page Size in bytes.
DRV_NVM_INSTANCES_NUMBER Selects the maximum number of Driver instances that can be
supported by the dynamic driver.
DRV_NVM_INTERRUPT_MODE Macro specifies operation of the driver to be in the interrupt mode or
polled mode
DRV_NVM_ROW_SIZE Specifies the NVM Driver Program Row Size in bytes.
DRV_NVM_UNLOCK_KEY1 Specifies the NVM Driver Program Unlock Key 1
DRV_NVM_UNLOCK_KEY2 Specifies the NVM Driver Program Unlock Key 2
File Name
drv_NVM_config_template.h
Company
Microchip Technology Incorported
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5.1.7 Parallel Master Port (PMP) Driver Library
5.1.7.1 Introduction
PMP Driver Library
for
Microchip Microcontrollers
This library provides an interface to manage the Parallel Master Port (PMP) module on Microchip family of microcontrollers in
different modes of operation.
Description
The Parallel Master Port (PMP) is a parallel 8-bit/16-bit I/O module specifically designed to communicate with a wide variety of
parallel devices such as communications peripherals, LCDs, external memory devices and microcontrollers. Because the
interfaces to parallel peripherals vary significantly, the PMP module is highly configurable.
The following figure shows a generic block diagram of the ways PMP module can be used:
PMP module can be used in different modes. Master and Slave are the two modes which can further have sub-modes
depending on the different microcontroller families.
Master Mode: In master mode, the PMP module can provide a 8-bit or 16-bit data bus, up to 16 bits of address, and all the
necessary control signals to operate a variety of external parallel devices such as memory devices, peripherals and slave
microcontrollers. The PMP master modes provide a simple interface for reading and writing data, but not executing program
instructions from external devices, such as SRAM or Flash memories.
Slave Mode: Slave modes support 8-bit data only and the module control pins are automatically dedicated when this mode is
selected.
5.1.7.2 Release Notes
MPLAB Harmony Version: v0.70b PMP Driver Library Version : 0.01 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
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Known Issues:
Nothing to report in this release.
5.1.7.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.7.4 Using the Library
This topic describes the basic architecture of the PMP Driver Library and provides information and examples on how to use it.
Interface Header File: drv_pmp.h
The interface to the PMP Driver library is defined in the "drv_pmp.h" header file. This file is included by the "drv.h" file. Any C
language source (.c) file that uses the PMP Driver Library should include "drv.h".
Library File: The PMP Driver Library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the driver interacts with the framework.
5.1.7.4.1 Abstraction Model
This library provides a low-level abstraction of the Parallel Master Port (PMP) module on Microchip's microcontrollers with a
convenient C language interface. This topic describes how that abstraction is modeled in software and introduces the library's
interface.
Description
Hardware Abstraction Model Description
The PMP module provides interface routines to interact with external peripherals such as LCD, EEPROM, Flash memory, etc.,
as shown in the following diagram. The diagram shows the PMP module acting as a master. The PMP module can be easily
configured to act as a slave. The address and data lines can be multiplexed to suit the application. The address and data buffers
are up to 2-byte (16-bit) buffers for data transmitted or received by the parallel interface to the PMP bus over the data and
address lines synchronized with control logic including the read and write strobe.
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PMP Hardware Abstraction Model Diagram
The desired timing wait states to suit different peripheral timings can also be programmed using the PMP module.
5.1.7.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various sub-sections, each sub-section addresses one of the blocks or the overall
operation of the PMP module.
Library Interface
Section
Description
System Functions Provides system module interfaces, device initialization, deinitialization, re-initialization, tasks, and
status functions.
Client Interaction
Functions
Provides open, close, client status and client mode configuration functions.
Client Transfer
Functions
Provides interface for data transfer in master and slave mode.
Miscellaneous Provides driver miscellaneous functions, version identification functions etc.
5.1.7.4.3 How the Library Works
This section describes how the PMP Driver Library operates.
Description
Before the driver is ready for use, its should be configured (compile time configuration). Refer to the Configuring the Library
section for more details on how to configure the driver.
There are few run-time configuration items that are done during initialization of the driver instance, and a few that are
client-specific and are done using dedicated functions.
To use the PMP Driver, initialization and client functions should be invoked in a specific sequence to ensure correct operation.
The following is the sequence in which various routines should be called:
1. Call DRV_PMP_Init to initialize the PMP Driver. Note that this may be performed by the MPLAB Harmony system module.
The DRV_PMP_Status function may be used to check the status of the initialization.
2. Once initialization for a particular driver instance is done, the client wanting to use the driver can open it using API
DRV_PMP_Open.
3. The DRV_PMP_ModeConfig function should now be called, which will configure the driver for the exact mode of operation
required by that client.
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4. After configuring the mode, DRV_PMP_Write and/or DRV_PMP_Read can be called by the user application to Write/Read
using the PMP module. Calling these functions does not start the PMP transfer immediately in non-interrupt mode. Instead, all
of these transfer tasks are queued in an internal queue. Actual transfer starts only when the PMP Task function is called by
the system/user. In interrupt mode, although transfer tasks are queued, the actual transfer starts immediately.
5. PMP Write and Read functions return an ID of that particular transfer, which should be saved by user to get the status of that
transfer later.
6. The system will either call DRV_PMP_Tasks from the System Task Service (in a polled environment), or it will be called from
interrupt service routine of the PMP.
7. At any time status of the transfer can be obtained by using DRV_PMP_TransferStatus.
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes.
5.1.7.4.3.1 System Initialization
This section describes initialization and reinitialization features.
Description
Initialization and Reinitialization
The system performs the initialization and the reinitialization of the device driver with settings that affect only the instance of the
device that is being initialized or reinitialized. During system initialization each instance of the PMP device will be initialized with
the following configuration settings:
Initialization
member
Description
moduleInit System module initialization of the power state.
pmpId PMP hardware module ID (peripheral library-level ID).
stopInIdle Decide whether or not the module should be stopped in Idle mode.
muxMode To select one of the different multiplexing modes possible for PMP module.
inputBuffer Select the type of Input Buffer will be of TTL or Schmitt Trigger.
polarity Select polarity of different PMP pins.
ports Set the pins the user wants to use as port or PMP pins.
The DRV_PMP_Initialize function returns an object handle of the type SYS_MODULE_OBJ. After this, the object handle
returned by the initialize interface would be used by the other system interfaces, such as DRV_PMP_Reinitialize,
DRV_PMP_Deinitialize, DRV_PMP_Status, and DRV_PMP_Tasks.
Example for PMP Initialization Through the DRV_PMP_INIT Structure
DRV_PMP_INIT init;
SYS_MODULE_OBJ object;
SYS_STATUS pmpStatus;
// populate the PMP init configuration structure
init.inputBuffer = PMP_INPUT_BUFFER_TTL;
init.polarity.addressLatchPolarity = PMP_POLARITY_ACTIVE_HIGH;
init.polarity.rwStrobePolarity = PMP_POLARITY_ACTIVE_LOW;
init.polarity.writeEnableStrobePolarity = PMP_POLARITY_ACTIVE_LOW;
init.polarity.chipselect1Polarity = PMP_POLARITY_ACTIVE_HIGH;
init.polarity.chipselect2Polarity = PMP_POLARITY_ACTIVE_LOW;
init.ports.addressPortsMask = PMP_PMA0_PORT | PMP_PMA1_PORT | PMP_PMA2_TO_PMA13_PORTS |
PMP_PMA14_PORT;
init.ports.readWriteStrobe = PORT_ENABLE;
init.ports.writeEnableStrobe = PORT_ENABLE;
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init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.pmpID = PMP_ID_0;
init.stopInIdle = false;
init.muxMode = PMP_MUX_NONE;
object = DRV_PMP_Initialize (DRV_PMP_INDEX_0, (SYS_MODULE_INIT *)&init);
pmpStatus = DRV_PMP_Status(object);
if ( SYS_STATUS_READY != pmpStatus)
{
// Handle error
}
Deinitialization
Once the initialize operation has been called, the deinitialize operation must be called before the initialize operation can be called
again. This routine may block if the driver is running in an OS environment that supports blocking operations and the driver
requires system resources access. However, the function will never block for hardware PMP access. If the operation requires
time to allow the hardware to complete, which will be reported by DRV_PMP_Status.
Status
PMP status is available to query the module state before, during and after initialization, deinitialization, and reinitialization.
Tasks Routine
The DRV_PMP_Tasks function will see the queue status and perform the task of transferring the data accordingly. In the
Blocking mode when interrupts are disabled, it will finish one of the tasks completely (that means emptying one space in queue),
and then return back. Whereas in Non-Blocking mode, it will return back just after starting one word (8-bit or 16-bit) of transfer
(may not be emptying one space in the queue, as that task may not be completely finished).
The DRV_PMP_Tasks function can be called in two ways:
• By the system task service in a polled environment
• By the interrupt service routine of the PMP in an interrupt-based system
Example: Polling
int main( void )
{
SYS_MODULE_OBJ object;
object = DRV_PMP_Initialize( DRV_PMP_INDEX_0, (SYS_MODULE_INIT *) &initConf );
if( SYS_STATUS_READY != DRV_PMP_Status( object ) )
return 0;
while (1)
{
DRV_PMP_Tasks (object);
}
}
Example: Interrupt
int main( void )
{
SYS_MODULE_OBJ object;
object = DRV_PMP_Initialize( DRV_PMP_INDEX_0, (SYS_MODULE_INIT *) &initConf );
if( SYS_STATUS_READY != DRV_PMP_Status( object ) )
return 0;
while (1);
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}
/* Sample interrupt routine not specific to any device family */
void ISR PMPInterrupt(void)
{
//Call the PMP Tasks routine
DRV_PMP_Tasks(object);
}
Note: A PMP transfer in Blocking mode in an interrupt environment is not supported.
5.1.7.4.3.1.1 Transfer Operation
This section describes transfer operation.
Description
Once the PMP Driver is open and configured for a client, it is set to start Reading/Writing through DRV_PMP_Read and
DRV_PMP_Write. However, these functions will not directly start reading or writing. These will just put the relevant information in
a queue in non-interrupt mode and return an ID that can be used later for checking the transfer status. In Interrupt mode, the
Read/Write functions will trigger the transfer immediately after storing the transfer information in the queue.
The user must use a buffer pointing to character for data values.
The repeatCount parameter allows the user to repeatedly write the same nBytes of data into the slave devices.
Example:
unsigned char myReadBuffer[300], myWriteBuffer[100]; // has to be 'char' arrays
uint32_t deviceAddress, nBytes, repeatCount, i;
uint32_t writeID, readID;
DRV_HANDLE handle;
//initialize, open and configure the driver/client
/* ... */
deviceAddress = 0x0206;
nBytes = 100;
repeatCount = 0x01;
for (i=0; i= pmpStatus)
{
// Handle error
}
5.1.7.7.1.4 DRV_PMP_Status Function
C
SYS_STATUS DRV_PMP_Status(
const SYS_MODULE_OBJ pmpDriverObject
);
Description
This function provides the current status of the PMP driver module.
Preconditions
The DRV_PMP_Initialize function must have been called before calling this function.
Parameters
Parameters Description
pmpDriverObject Driver object handle, returned from the DRV_PMP_Initialize routine
Returns
SYS_STATUS_READY - Indicates that the driver is busy with a previous system level operation and cannot start another
Remarks
Any value greater than SYS_STATUS_READY is also a normal running state in which the driver is ready to accept new
operations.
SYS_STATUS_BUSY - Indicates that the driver is busy with a previous system level operation and cannot start another
SYS_STATUS_ERROR - Indicates that the driver is in an error state
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Any value less than SYS_STATUS_ERROR is also an error state.
SYS_MODULE_DEINITIALIZED - Indicates that the driver has been deinitialized
This value is less than SYS_STATUS_ERROR.
This operation can be used to determine when any of the driver's module level operations has completed.
If the status operation returns SYS_STATUS_BUSY, a previous operation has not yet completed. Once the status operation
returns SYS_STATUS_READY, any previous operations have completed.
The value of SYS_STATUS_ERROR is negative (-1). Any value less than that is also an error state.
This function will NEVER block waiting for hardware.
If the Status operation returns an error value, the error may be cleared by calling the reinitialize operation. If that fails, the
deinitialize operation will need to be called, followed by the initialize operation to return to normal operations.
Example
SYS_MODULE_OBJ pmpDriverObject; // Returned from DRV_PMP_Initialize
SYS_STATUS status;
status = DRV_PMP_Status(pmpDriverObject);
else if (SYS_STATUS_ERROR >= status)
{
// Handle error
}
5.1.7.7.1.5 DRV_PMP_Tasks Function
C
void DRV_PMP_Tasks(
SYS_MODULE_OBJ pmpDriverObject
);
Description
This function is used to maintain the queue and execute the tasks stored in the queue. It resides in the ISR of the PMP for
interrupt-driven implementations.
Preconditions
The DRV_PMP_Initialize function must have been called for the specified PMP driver instance.
Parameters
Parameters Description
pmpDriverObject Object handle for the specified driver instance (returned from DRV_PMP_Initialize)
Returns
None.
Remarks
This function is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
appropriate raw ISR.
This function may excute in an ISR context and will never block or access any resources that may cause it to block.
Example
SYS_MODULE_OBJ pmpDriverObject; // Returned from DRV_PMP_Initialize
while (true)
{
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DRV_PMP_Tasks (pmpDriverObject);
// Do other tasks
}
5.1.7.7.2 Client Interaction Functions
5.1.7.7.2.1 DRV_PMP_ClientStatus Function
C
DRV_PMP_CLIENT_STATUS DRV_PMP_ClientStatus(
DRV_HANDLE hClient
);
Description
This function gets the client-specfic status of the PMP driver associated with the specified handle.
Preconditions
The DRV_PMP_Initialize routine must have been called.
DRV_PMP_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
hClient A valid open-instance handle, returned from the driver's open routine
Returns
A DRV_PMP_CLIENT_STATUS value describing the current status of the driver.
Remarks
This function will not block for hardware access and will immediately return the current status.
Example
DRV_HANDLE hClient; // Returned from DRV_PMP_Open
DRV_PMP_CLIENT_STATUS pmpClientStatus;
pmpClientStatus = DRV_PMP_ClientStatus(hClient);
if(DRV_PMP_CLIENT_STATUS_ERROR >= pmpClientStatus)
{
// Handle the error
}
5.1.7.7.2.2 DRV_PMP_Close Function
C
void DRV_PMP_Close(
const DRV_HANDLE hClient
);
Description
This function closes an opened instance of the PMP driver, invalidating the handle.
Preconditions
The DRV_PMP_Initialize routine must have been called for the specified PMP driver instance.
DRV_PMP_Open must have been called to obtain a valid opened device handle.
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Parameters
Parameters Description
hClient A valid open instance handle, returned from the driver's open routine
Returns
None
Remarks
After calling this function, the handle passed in "handle" must not be used with any of the remaining driver routines. A new
handle must be obtained by calling DRV_PMP_Open before the caller may use the driver again.
If DRV_IO_INTENT_BLOCKING was requested and the driver was built appropriately to support blocking behavior call may
block until the operation is complete.
If DRV_IO_INTENT_NON_BLOCKING request the driver client can call the DRV_PMP_Status operation to find out when the
module is in the ready state (the handle is no longer valid).
Usually there is no need for the driver client to verify that the Close operation has completed.
Example
DRV_HANDLE hClient; // Returned from DRV_PMP_Open
DRV_PMP_Close(hClient);
5.1.7.7.2.3 DRV_PMP_ModeConfig Function
C
void DRV_PMP_ModeConfig(
DRV_HANDLE hClient,
DRV_PMP_MODE_CONFIG config
);
Description
This function configures the modes for client in which it wants to operate. Different master-slave modes, 8/16 data bits selection,
address increment/decrement, interrupt mode, wait states, etc., can be configured through this function.
Preconditions
Function DRV_PMP_Initialize must have been called. DRV_PMP_Open must have been called to obtain a valid opened device
handle.
Parameters
Parameters Description
hClient Client handle obtained from DRV_PMP_Open API
config Structure which will have all the required PMP modes configuration
Returns
None.
Remarks
This function will NEVER block waiting for hardware. If this API is called more than once for a particular client handle, previous
config setting of that client will be overwritten.
Example
DRV_HANDLE hClient;
DRV_PMP_MODE_CONFIG config;
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config.chipSelect = PMCS1_AND_PMCS2_AS_CHIP_SELECT;
config.endianMode = LITTLE_ENDIAN;
config.incrementMode = PMP_ADDRESS_AUTO_INCREMENT;
config.intMode = PMP_INTERRUPT_NONE;
config.pmpMode = PMP_MASTER_READ_WRITE_STROBES_INDEPENDENT;
config.portSize = PMP_DATA_SIZE_8_BITS;
config.waitStates.dataHoldWait = PMP_DATA_HOLD_2;
config.waitStates.dataWait = PMP_DATA_WAIT_THREE;
config.waitStates.strobeWait = PMP_STROBE_WAIT_5;
DRV_PMP_ModeConfig ( hClient, config );
5.1.7.7.2.4 DRV_PMP_Open Function
C
DRV_HANDLE DRV_PMP_Open(
const SYS_MODULE_INDEX index,
const DRV_IO_INTENT intent
);
Description
This function opens the specified PMP driver instance and provides a handle that must be provided to all other client-level
operations to identify the caller and the instance of the driver.
Preconditions
The DRV_PMP_Initialize function must have been called before calling this function.
Parameters
Parameters Description
drvIndex Identifier for the object instance to be opened
intent Zero or more of the values from the enumeration DRV_IO_INTENT ORed together
to indicate the intended use of the driver
Returns
If successful, the function returns a valid open-instance handle (a number identifying both the caller and the module instance).
If an error occurs, the return value is DRV_HANDLE_INVALID.
Remarks
The handle returned is valid until the DRV_PMP_Close routine is called.
This function will NEVER block waiting for hardware.
If the DRV_IO_INTENT_BLOCKING is requested and the driver was built appropriately to support blocking behavior, other
client-level operations may block waiting on hardware until they are complete.
If DRV_IO_INTENT_NON_BLOCKING is requested the driver client can call the DRV_PMP_ClientStatus operation to find out
when the module is in the ready state.
If the requested intent flags are not supported, the routine will return DRV_HANDLE_INVALID.
Example
DRV_HANDLE hClient;
hClient = DRV_PMP_Open(DRV_PMP_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if (DRV_HANDLE_INVALID == hClient)
{
// Unable to open the driver
}
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5.1.7.7.2.5 DRV_PMP_Read Function
C
QUEUE_ELEMENT_OBJECT* DRV_PMP_Read(
DRV_HANDLE hClient,
uint32_t address,
uint16_t* buffer,
uint32_t nBytes
);
Description
This function reads the given number of data bytes from the given address of the external device to the MCU buffer through the
selected PMP instance. This function should be used for all the master and slave modes. Proper configuration should be done
using DRV_PMP_ModeConfig before calling this function.
Preconditions
The DRV_PMP_Initialize routine must have been called. DRV_PMP_Open must have been called to obtain a valid opened
device handle. DRV_PMP_ModeConfig must have been called to configure the desired mode
Parameters
Parameters Description
hClient A valid open-instance handle, returned from the driver's open routine
address Starting address of the slave device from where data has to be read. It does not
have any significance for legacy slave mode and buffer mode. In PMP enhanced
slave mode i.e. addressable buffer slave mode, this parameter should be the
buffer number to be used.
buffer Pointer to the buffer into which the data read through the PMP instance will be
placed. Even if only one word has to be tranferred, pointer should be used.
nBytes Number of bytes that need to be read through the PMP instance
Returns
Returns the position number of the queue, where the data element was stored. Returns '0' when there is no place in the queue to
store the data.
Example
DRV_HANDLE hClient; // Returned from DRV_PMP_Open
uint32_t deviceAddress;
uint32_t nBytes;
unsigned char myBuffer[nBytes];
uint32_t transferID;
transferID = DRV_PMP_Read ( hClient, deviceAddress, &myBuffer, nBytes);
5.1.7.7.2.6 DRV_PMP_Write Function
C
QUEUE_ELEMENT_OBJECT* DRV_PMP_Write(
DRV_HANDLE* hClient,
bool address,
uint32_t * buffer,
uint32_t nBytes,
uint32_t repeatCount
);
Description
This function transfer the given number of data bytes from the MCU buffer location to the defined address of the external device
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through the selected PMP instance. It repeats the operation n (=repeatCount) number of times as well. This function should be
used for all the master and slave modes. Proper configuration should be done using DRV_PMP_ModeConfig before calling this
function.
Preconditions
The DRV_PMP_Initialize routine must have been called. DRV_PMP_Open must have been called to obtain a valid opened
device handle. DRV_PMP_ModeConfig must have been called to configure the desired mode.
Parameters
Parameters Description
hClient A valid open-instance handle, returned from the driver's open routine
address Starting address of the slave device where data has to be written. It does not have
any significance for legacy slave mode and buffer mode. In PMP enhanced slave
mode (i.e., addressable buffer slave mode), this parameter should be the buffer
number to be used.
buffer Pointer to MCU Buffer from which the data will be written through the PMP
instance. even if only one word has to be tranferred, pointer should be used.
nBytes Total number of bytes that need to be written through the PMP instance
repeatCount Number of times the data set (nBytes of data) to be repetedly written. This value
should be 0 if user does not want any repetation. If repeatCount is greater than 0,
then after writing every nBytes of data, the buffer starts pointing to its first element.
Ideally, PMP Address should be in auto increment/decrement mode for
repeatCount greater than 0.
Returns
Returns a 32-bit ID with which status of the transfer can be checked later. Returns '0' when there is no place in the queue to
store the data.
Example
DRV_HANDLE hClient; // Returned from DRV_PMP_Open
uint32_t deviceAddress;
uint32_t nBytes;
unsigned char myBuffer[nBytes];
uint32_t repeatCount;
uint32_t transferID;
transferID = DRV_PMP_MasterWrite ( hClient, deviceAddress, &myBuffer, nBytes, repeatCount);
5.1.7.7.3 Client Transfer Functions
5.1.7.7.3.1 DRV_PMP_TransferStatus Function
C
DRV_PMP_TRANSFER_STATUS DRV_PMP_TransferStatus(
QUEUE_ELEMENT_OBJECT* queueObject
);
Description
This function returns the status of a particular transfer whose ID has been specified as input.
Parameters
Parameters Description
drvIndex Identifier for the object instance to be opened
seqID A valid ID returned from read/write transfer functions
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Returns
A DRV_PMP_TRANSFER_STATUS value describing the current status of the transfer.
Example
uint32_8 seqID;
DRV_PMP_TRANSFER_STATUS transferStatus;
transferStatus = DRV_PMP_TransferStatus( DRV_PMP_INDEX_0, seqID);
5.1.7.7.4 Data Types and Constants
5.1.7.7.4.1 DRV_PMP_INDEX_COUNT Macro
C
#define DRV_PMP_INDEX_COUNT _PMP_EXISTS
Description
PMP Driver Module Index Count
This constant identifies the number of valid PMP driver indices.
Remarks
The value of "_PMP_EXISTS" is derived from device-specific header files defined as part of the peripheral libraries.
5.1.7.7.4.2 DRV_PMP_CHIPX_STROBE_MODE Enumeration
C
typedef enum {
PMP_RW_STROBE_WITH_ENABLE_STROBE,
PMP_READ_AND_WRITE_STROBES
} DRV_PMP_CHIPX_STROBE_MODE;
Description
PMP writeEnable/ReadWrite strobes
This enumeration provides ReadWrite/WriteEnable Strobe definitions.
Members
Members Description
PMP_RW_STROBE_WITH_ENABLE_STROBE One strobe for read/write and another for enable
PMP_READ_AND_WRITE_STROBES Separate strobes for read and write operations
5.1.7.7.4.3 DRV_PMP_CLIENT_STATUS Enumeration
C
typedef enum {
DRV_PMP_CLIENT_STATUS_INVALID,
PMP_CLIENT_STATUS_CLOSED,
DRV_PMP_CLIENT_STATUS_OPEN
} DRV_PMP_CLIENT_STATUS;
Description
PMP Client Status
This enumeration provides various client status possibilities.
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5.1.7.7.4.4 DRV_PMP_ENDIAN_MODE Enumeration
C
typedef enum {
LITTLE,
BIG
} DRV_PMP_ENDIAN_MODE;
Description
PMP Endian modes
This enumeration holds the endian configuration options.
Members
Members Description
LITTLE Little Endian
BIG Big Endian
5.1.7.7.4.5 DRV_PMP_INDEX Enumeration
C
typedef enum {
DRV_PMP_INDEX_0,
DRV_PMP_INDEX_1
} DRV_PMP_INDEX;
Description
PMP Driver Module Index Numbers
These constants provide PMP driver index definitions.
Members
Members Description
DRV_PMP_INDEX_0 First PMP instance
DRV_PMP_INDEX_1 Second PMP instance (not avaialble for now)
Remarks
These values should be passed into the DRV_PMP_Initialize and DRV_PMP_Open functions to identify the driver instance in
use.
5.1.7.7.4.6 DRV_PMP_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
PMP_MODULE_ID pmpID;
bool stopInIdle;
PMP_MUX_MODE muxMode;
PMP_INPUT_BUFFER_TYPE inputBuffer;
DRV_PMP_POLARITY_OBJECT polarity;
DRV_PMP_PORTS ports;
} DRV_PMP_INIT;
Description
PMP Driver Initialize Data
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This data type defines data required to initialize or reinitialize the PMP driver.
Members
Members Description
SYS_MODULE_INIT moduleInit; module power state info
PMP_MODULE_ID pmpID; module PLIB ID
bool stopInIdle; Stop in Idle enable
PMP_MUX_MODE muxMode; MUX mode
PMP_INPUT_BUFFER_TYPE inputBuffer; Input buffer type to be used
DRV_PMP_POLARITY_OBJECT polarity; Polarity settings
DRV_PMP_PORTS ports; PMP port settings
Remarks
Not all the initialization features are available for all devices.
5.1.7.7.4.7 DRV_PMP_MODE_CONFIG Structure
C
typedef struct {
PMP_OPERATION_MODE pmpMode;
PMP_INTERRUPT_MODE intMode;
PMP_INCREMENT_MODE incrementMode;
DRV_PMP_ENDIAN_MODE endianMode;
PMP_DATA_SIZE portSize;
DRV_PMP_WAIT_STATES waitStates;
PMP_CHIPSELECT_FUNCTION chipSelect;
} DRV_PMP_MODE_CONFIG;
Description
PMP modes configuration
This data type controls the configuration of PMP modes.
Members
Members Description
PMP_OPERATION_MODE pmpMode; PMP Usage Mode Type
PMP_INTERRUPT_MODE intMode; Interrupt mode
PMP_INCREMENT_MODE
incrementMode;
should be appropriately selected based on read/write requirements and operation
mode setting */ address/buffer increment mode
DRV_PMP_ENDIAN_MODE endianMode; it does not have any significance in PMP slave mode or 8bit data mode */ Endian
modes
PMP_DATA_SIZE portSize; Data Port Size
DRV_PMP_WAIT_STATES waitStates; Wait states
PMP_CHIPSELECT_FUNCTION
chipSelect;
use this when plib is fixed
5.1.7.7.4.8 DRV_PMP_POLARITY_OBJECT Structure
C
typedef struct {
PMP_POLARITY_LEVEL addressLatchPolarity;
PMP_POLARITY_LEVEL byteEnablePolarity;
PMP_POLARITY_LEVEL rwStrobePolarity;
PMP_POLARITY_LEVEL writeEnableStrobePolarity;
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PMP_POLARITY_LEVEL chipselect1Polarity;
PMP_POLARITY_LEVEL chipselect2Polarity;
} DRV_PMP_POLARITY_OBJECT;
Description
PMP polarity object
This structure holds the polarities of different entities to be configured.
Members
Members Description
PMP_POLARITY_LEVEL
addressLatchPolarity;
Address latch polarity
PMP_POLARITY_LEVEL
byteEnablePolarity;
ByteEnable port polarity
PMP_POLARITY_LEVEL rwStrobePolarity; Read/Write strobe polarity
PMP_POLARITY_LEVEL
writeEnableStrobePolarity;
Write/Enable strobe polarity
PMP_POLARITY_LEVEL
chipselect1Polarity;
ChipSelect-1 Polarity
PMP_POLARITY_LEVEL
chipselect2Polarity;
chipSelect-2 Polarity
5.1.7.7.4.9 DRV_PMP_PORT_CONTROL Enumeration
C
typedef enum {
PORT_ENABLE,
PORT_DISABLE
} DRV_PMP_PORT_CONTROL;
Description
PMP port enable/disable.
This enumeration provides port enable/disable values.
Members
Members Description
PORT_ENABLE Enable the given port
PORT_DISABLE Disable the given port
5.1.7.7.4.10 DRV_PMP_PORTS Structure
C
typedef struct {
PMP_ADDRESS_PORT addressPortsMask;
PMP_PMBE_PORT byteEnablePort;
DRV_PMP_PORT_CONTROL readWriteStrobe;
DRV_PMP_PORT_CONTROL writeEnableStrobe;
} DRV_PMP_PORTS;
Description
PMP Ports
This structure holds the ports (including the address ports) to be configured by the application to function as general purpose I/O
(GPIO) or part of the PMP.
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Members
Members Description
PMP_ADDRESS_PORT
addressPortsMask;
User needs to put the address lines which he wants to use in OR'd fashion */
Address ports
PMP_PMBE_PORT byteEnablePort; Byte enable ports
DRV_PMP_PORT_CONTROL
readWriteStrobe;
READ/WRITE Strobe PORT
DRV_PMP_PORT_CONTROL
writeEnableStrobe;
WRITE/ENABLE strobe port
5.1.7.7.4.11 DRV_PMP_QUEUE_ELEMENT_OBJ Type
C
typedef struct _DRV_PMP_QUEUE_ELEMENT_OBJ DRV_PMP_QUEUE_ELEMENT_OBJ;
Description
PMP Driver Queue Element Object
This defines the object structure for each queue element of PMP. This object gets created for every Read/Write operations APIs.
Remarks
None
5.1.7.7.4.12 DRV_PMP_TRANSFER_STATUS Enumeration
C
typedef enum {
MASTER_8BIT_TRANSFER_IN_PROGRESS = PMP_DATA_SIZE_8_BITS,
MASTER_16BIT_TRANSFER_IN_PROGRESS = PMP_DATA_SIZE_16_BITS,
MASTER_8BIT_BUFFER_IN_PROGRESS,
MASTER_16BIT_BUFFER_IN_PROGRESS,
MASTER_8BIT_BUFFER_CONTINUE,
QUEUED_BUT_PMP_TRANSFER_NOT_STARTED,
PMP_TRANSFER_FINISHED
} DRV_PMP_TRANSFER_STATUS;
Description
Queue Element Transfer Status
This enumeration defines the PMP transfer status.
5.1.7.7.4.13 DRV_PMP_WAIT_STATES Structure
C
typedef struct {
PMP_DATA_HOLD_STATES dataHoldWait;
PMP_STROBE_WAIT_STATES strobeWait;
PMP_DATA_WAIT_STATES dataWait;
} DRV_PMP_WAIT_STATES;
Description
PMP wait states object
This structure holds the different wait states to be configured. Refer to the PMP PLIB help document for the possible values and
meaning of the different wait states.
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Members
Members Description
PMP_DATA_HOLD_STATES
dataHoldWait;
data hold wait states
PMP_STROBE_WAIT_STATES
strobeWait;
read/write strobe wait states
PMP_DATA_WAIT_STATES dataWait; data wait strobe wait sates
5.1.7.7.4.14 QUEUE_ELEMENT_OBJECT Type
C
typedef struct _QUEUE_ELEMENT_OBJECT QUEUE_ELEMENT_OBJECT;
Description
Queue Element Object
This defines the structure required for maintaining the queue element.
Remarks
None
5.1.7.7.4.15 MAX_NONBUFFERED_BYTE_COUNT Macro
C
#define MAX_NONBUFFERED_BYTE_COUNT 4 //After this number the PMP transfer should be polled to
gurantee data trasnfer
Description
After this number the PMP transfer should be polled to gurantee data trasnfer
5.1.7.7.4.16 DRV_PMP_TRANSFER_TYPE Enumeration
C
typedef enum {
ADDRESS,
READ,
WRITE,
BUFFERED_WRITE
} DRV_PMP_TRANSFER_TYPE;
Description
This is type DRV_PMP_TRANSFER_TYPE.
Members
Members Description
ADDRESS PMP Address needs to be updated
READ PMP Read Transfer
WRITE PMP Write Transfer
BUFFERED_WRITE PMP Array Write Transfer
5.1.7.7.5 Miscellaneous Functions
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5.1.7.7.5.1 DRV_PMP_VersionGet Function
C
unsigned int DRV_PMP_VersionGet(
const SYS_MODULE_INDEX drvIndex
);
Description
This function gets the PMP driver version. The version is encoded as major * 10000 + minor * 100 + patch. The stringed version
can be obtained using DRV_PMP_VersionStrGet().
Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the driver instance to get the version for
Returns
Current driver version in numerical format.
Remarks
None.
Example
unsigned int version;
version = DRV_PMP_VersionGet( DRV_PMP_INDEX_0 );
if(version < 110200)
{
// Do Something
}
5.1.7.7.5.2 DRV_PMP_VersionStrGet Function
C
char * DRV_PMP_VersionStrGet(
const SYS_MODULE_INDEX drvIndex
);
Description
This function gets the PMP driver version. The version is returned as major.minor.path[type], where type is optional. The
numerical version can be obtained using DRV_PMP_VersionGet().
Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the driver instance to get the version for
Returns
Current PMP driver version in the string format.
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Remarks
None.
Example
char *version;
version = DRV_PMP_VersionStrGet( DRV_PMP_INDEX_0 );
printf("%s", version);
5.1.7.8 Files
Files
Name Description
drv_pmp.h Parallel Master Port (PMP) device driver interface file.
drv_pmp_config.h PMP driver configuration definitions template
Description
5.1.7.8.1 drv_pmp.h
PMP Device Driver Interface
The PMP device driver provides a simple interface to manage the Parallel Master and Slave ports. This file defines the interface
definitions and prototypes for the PMP driver.
Enumerations
Name Description
DRV_PMP_CHIPX_STROBE_MODE PMP writeEnable/ReadWrite strobes.
DRV_PMP_CLIENT_STATUS PMP client status definitions.
DRV_PMP_ENDIAN_MODE PMP endian modes.
DRV_PMP_INDEX PMP driver index definitions.
DRV_PMP_PORT_CONTROL PMP port enable/disable definitions.
DRV_PMP_TRANSFER_STATUS Defines the PMP transfer status.
DRV_PMP_TRANSFER_TYPE This is type DRV_PMP_TRANSFER_TYPE.
Functions
Name Description
DRV_PMP_ClientStatus Gets the current client-specific status of the PMP driver.
DRV_PMP_Close Closes an opened instance of the PMP driver.
DRV_PMP_Deinitialize Deinitializes the specified instance of the PMP driver module
DRV_PMP_Initialize Initializes the PMP driver.
DRV_PMP_ModeConfig Configure the PMP modes.
DRV_PMP_Open Opens the specified PMP driver instance and returns a handle to it.
DRV_PMP_Read Read the data from external device.
DRV_PMP_Reinitialize Reinitializes the driver and refreshes any associated hardware settings.
DRV_PMP_Status Provides the current status of the PMP driver module.
DRV_PMP_Tasks Maintains the driver's state machine and implements its ISR.
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DRV_PMP_TransferStatus Returns the transfer status.
DRV_PMP_VersionGet Gets the PMP driver version in numerical format.
DRV_PMP_VersionStrGet Gets the PMP driver version in string format.
DRV_PMP_Write Transfers the data from the MCU to the external device.
Macros
Name Description
DRV_PMP_INDEX_COUNT Number of valid PMP driver indices.
MAX_NONBUFFERED_BYTE_COUNT After this number the PMP transfer should be polled to gurantee data
trasnfer
Structures
Name Description
DRV_PMP_INIT Defines the PMP driver initialization data.
DRV_PMP_MODE_CONFIG PMP modes configuration.
DRV_PMP_POLARITY_OBJECT PMP polarity object.
DRV_PMP_PORTS PMP port configuration.
DRV_PMP_WAIT_STATES PMP wait states object.
Types
Name Description
DRV_PMP_QUEUE_ELEMENT_OBJ Defines the object for PMP queue element.
QUEUE_ELEMENT_OBJECT Defines the structure required for maintaining the queue element.
Company
Microchip Technology Inc.
FileName: drv_pmp.h
5.1.7.8.2 drv_pmp_config.h
PMP Driver Configuration Definitions for the Template Version
These definitions statically define the driver's mode of operation.
Macros
Name Description
DRV_PMP_CLIENTS_NUMBER Selects the maximum number of clients.
DRV_PMP_INSTANCES_NUMBER Selects the maximum number of hardware instances that can be supported
by the dynamic driver.
DRV_PMP_QUEUE_SIZE PMP queue size for different instances.
File Name
drv_pmp_config_template.h
Company
Microchip Technology Inc.
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5.1.8 Secure Digital (SD) Card Driver Library
5.1.8.1 Introduction
Secure Digital (SD) Card Driver Library
for
Microchip Microcontrollers
The SD Card driver provides the necessary interfaces to interact with an SD card. It provides the necessary abstraction for the
higher layer.
Description
A SD Card is a non-volatile memory (Flash memory) card designed to provide high-capacity memory in a small size. Its
applications are like digital video camcorders, digital cameras, handheld computers, audio players and mobile phones.
5.1.8.2 Release Notes
MPLAB Harmony Version: v0.70b SD Card Library Version : Release Date: 18Nov2013
New This Release:
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• Non-blocking operation
• Layered architecture
• Interoperability
Known Issues:
• Tested only with SDHC cards (Card memory more than 2 GB)
• CARD detection mechanism is not so fine-tuned
• Card maximum Frequency detection is not automatic. Different cards will have specific specific frequency of operation and
that needs to be set in system_config.h
• Not tested the drivers operation with multiple SD cards
• Timeout and driver reset on failure case is not implemented
5.1.8.3 SW License Agreement
(c) 2013 Microchip Technology Inc. Microchip licenses this software to you solely for use with Microchip products. The software
is owned by Microchip and its licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.8.4 Using the Library
This topic describes the basic architecture of the SD Card Driver Library and provides information and examples on how to use it.
Interface Header File: drv_sdcard.h
The interface to the SD Card Driver library is defined in the "drv _sdcard.h" header file. This file is included by the "drv.h" file. Any
C language source (.c) file that uses the SD Card Driver library should include "drv.h".
Library File:
The SD Card Driver library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the Driver interacts with the framework.
5.1.8.4.1 Abstraction Model
SD Card Driver Software Abstraction Block Diagram
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• SD Card driver comes in the layer below the Partition Manager in MPLAB Harmony file system architecture.
• It uses the SPI driver to interact with SD card.
5.1.8.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the SD Card module.
Library Interface Section Description
System Level Functions Includes functions for initialize the module.
Client Level Functions Functions to open and close a client.
Operation Functions Functions for read and write operations
Module Information Functions Functions for information about the module.
Version Information Functions Functions to get the software version.
5.1.8.4.3 How the Library Works
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes.
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5.1.8.5 Configuring the Library
The configuration of the SD Card driver is based on the file sys_config.h
This header file contains the configuration selection for the SD Card driver. Based on the selections made, the SD Card driver
will support or not support selected features. These configuration settings will apply to all instances of the SD Card.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.1.8.6 Building the Library
This section list the files that are available in the \src of the SD Card driver. It lists which files need to be included in the build
based on either a hardware feature present on the board or configuration option selected by the system.
5.1.8.7 Library Interface
Data Types and Constants
Name Description
DRV_SDCARD_INDEX_0 SD Card driver index definitions
DRV_SDCARD_INDEX_COUNT Number of valid SD Card driver indices
DRV_SDCARD_BUFFER_HANDLE Handle to a buffer added to the process queue.
DRV_SDCARD_CLIENT_STATUS Identifies the client-specific status of the SD card driver
DRV_SDCARD_INIT Contains all the data necessary to initialize the SD Card device
SYS_MEDIA_EVENT Defines the buffer status
SDCARD_MAX_LIMIT Maximum allowed SD card instances
DRV_SDCARD_INDEX_1 This is macro DRV_SDCARD_INDEX_1.
DRV_SDCARD_INDEX_2 This is macro DRV_SDCARD_INDEX_2.
DRV_SDCARD_INDEX_3 This is macro DRV_SDCARD_INDEX_3.
Client Level Functions
Name Description
DRV_SDCARD_ClientStatus Gets current client-specific status the SD Card driver
DRV_SDCARD_Close Closes an opened-instance of the SD Card driver
DRV_SDCARD_Open Opens the specified SD Card driver instance and returns a handle to it
Module Information Functions
Name Description
DRV_SDCARD_SectorsCountGet Gets the number of sectors present in the selected SD card device.
DRV_SDCARD_SectorSizeGet Gets the sector size of the selected SD card device.
DRV_SDCARD_WriteProtectionIsEnabled Gets the status of write protection.
Operation Functions
Name Description
DRV_SDCARD_SectorRead Reads data from the sectors of the SD card.
DRV_SDCARD_SectorWrite Writes sector(s) of data to an SD card.
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DRV_SDCARD_BufferStatusGet Gets the status of an an SD card operation (read/write)
DRV_SDCARD_MediaStatusGet Gets the status of the device.
System Level Functions
Name Description
DRV_SDCARD_Deinitialize Deinitializes the specified instance of the SD Card driver module
DRV_SDCARD_Initialize Initializes the SD Card driver
DRV_SDCARD_Reinitialize Reinitializes the driver and refreshes any associated hardware settings
DRV_SDCARD_Status Provides the current status of the SD Card driver module
DRV_SDCARD_Tasks Maintains the driver's state machine
Version Information Functions
Name Description
DRV_SDCARD_VersionGet Gets SD card driver version in numerical format.
DRV_SDCARD_VersionStrGet Gets SD card driver version in string format.
Description
This section describes the Application Programming Interface (API) functions of the SD Card Driver.
Refer to each section for a detailed description.
5.1.8.7.1 System Level Functions
5.1.8.7.1.1 DRV_SDCARD_Deinitialize Function
C
void DRV_SDCARD_Deinitialize(
SYS_MODULE_OBJ object
);
Description
Deinitializes the specified instance of the SD Card driver module, disabling its operation (and any hardware). Invalidates all the
internal data.
Preconditions
Function DRV_SDCARD_Initialize must have been called before calling this routine and a valid SYS_MODULE_OBJ must have
been returned.
Parameters
Parameters Description
object Driver object handle, returned from the DRV_SDCARD_Initialize routine.
Returns
None.
Remarks
Once the Initialize operation has been called, the Deinitialize operation must be called before the Initialize operation can be
called again.
This routine will NEVER block waiting for hardware. If the operation requires time to allow the hardware to complete, this will be
reported by the DRV_SDCARD_Status operation. The system has to use DRV_SDCARD_Status to find out when the module is
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in the ready state.
Example
SYS_MODULE_OBJ object; // Returned from DRV_SDCARD_Initialize
SYS_STATUS status;
DRV_SDCARD_Deinitialize(object);
status = DRV_SDCARD_Status(object);
if (SYS_MODULE_UNINITIALIZED == status)
{
// Check again later if you need to know
// when the driver is deinitialized.
}
5.1.8.7.1.2 DRV_SDCARD_Initialize Function
C
SYS_MODULE_OBJ DRV_SDCARD_Initialize(
const SYS_MODULE_INDEX index,
const SYS_MODULE_INIT * const init
);
Description
This routine initializes the SD Card driver, making it ready for clients to open and use it.
Preconditions
None.
Parameters
Parameters Description
drvIndex Index for the driver instance to be initialized
init Pointer to a data structure containing any data necessary to initialize the driver.
This pointer may be null if no data is required because static overrides have been
provided.
Returns
If successful, returns a valid handle to a driver object. Otherwise, it returns SYS_MODULE_OBJ_INVALID. The returned object
must be passed as argument to DRV_SDCARD_Reinitialize, DRV_SDCARD_Deinitialize, DRV_SDCARD_TaskRead,
DRV_SDCARD_TaskWrite and DRV_SDCARD_Status routines.
Remarks
This routine must be called before any other SD Card routine is called.
This routine should only be called once during system initialization unless DRV_SDCARD_Deinitialize is called to de-initialize the
driver instance.
This routine will NEVER block for hardware access. If the operation requires time to allow the hardware to re-initialize, it will be
reported by the DRV_SDCARD_Status operation. The system must use DRV_SDCARD_Status to find out when the driver is in
the ready state.
Build configuration options may be used to statically override options in the "init" structure and will take precedence over
initialization data passed using this routine.
Example
DRV_SDCARD_INIT init;
SYS_MODULE_OBJ objectHandle;
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// Populate the SD Card initialization structure
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.baudRate = 100000;
init.spiId = SPI_ID_1;
// Do something
objectHandle = DRV_SDCARD_Initialize(DRV_SDCARD_INDEX_0, (SYS_MODULE_INIT*)&init);
if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
5.1.8.7.1.3 DRV_SDCARD_Reinitialize Function
C
void DRV_SDCARD_Reinitialize(
SYS_MODULE_OBJ object,
const SYS_MODULE_INIT * const init
);
Description
This routine reinitializes the driver and refreshes any associated hardware settings using the initialization data given, but it will
not interrupt any ongoing operations.
Preconditions
Function DRV_SDCARD_Initialize must have been called before calling this routine and a valid SYS_MODULE_OBJ must have
been returned.
Parameters
Parameters Description
object Driver object handle, returned from the DRV_SDCARD_Initialize routine
init Pointer to the initialization data structure
Returns
None
Remarks
This function can be called multiple times to reinitialize the module.
This operation can be used to refresh any supported hardware registers as specified by the initialization data or to change the
power state of the module.
This routine will NEVER block for hardware access. If the operation requires time to allow the hardware to re-initialize, it will be
reported by the DRV_SDCARD_Status operation. The system must use DRV_SDCARD_Status to find out when the driver is in
the ready state.
Build configuration options may be used to statically override options in the "init" structure and will take precedence over
initialization data passed using this routine.
Example
DRV_SDCARD_INIT init;
SYS_MODULE_OBJ objectHandle;
// Populate the SD Card initialization structure
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.baudRate = 100000;
init.spiId = SPI_ID_1;
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// Do something
5.1.8.7.1.4 DRV_SDCARD_Status Function
C
SYS_STATUS DRV_SDCARD_Status(
SYS_MODULE_OBJ object
);
Description
This routine provides the current status of the SD Card driver module.
Preconditions
Function DRV_SDCARD_Initialize must have been called before calling this
Parameters
Parameters Description
object Driver object handle, returned from the DRV_SDCARD_Initialize routine
Returns
SYS_STATUS_READY - Indicates that the driver is busy with a previous system level operation and cannot start another
Note Any value greater than SYS_STATUS_READY is also a normal running state in which the driver is ready to accept new
operations.
SYS_STATUS_BUSY - Indicates that the driver is busy with a previous system level operation and cannot start another
SYS_STATUS_ERROR - Indicates that the driver is in an error state
Remarks
Any value less than SYS_STATUS_ERROR is also an error state.
SYS_MODULE_DEINITIALIZED - Indicates that the driver has been de-initialized
This value is less than SYS_STATUS_ERROR
The this operation can be used to determine when any of the driver's module level operations has completed.
If the status operation returns SYS_STATUS_BUSY, the a previous operation has not yet completed. Once the status operation
returns SYS_STATUS_READY, any previous operations have completed.
The value of SYS_STATUS_ERROR is negative (-1). Any value less than that is also an error state.
This routine will NEVER block waiting for hardware.
If the Status operation returns an error value, the error may be cleared by calling the reinitialize operation. If that fails, the
deinitialize operation will need to be called, followed by the initialize operation to return to normal operations.
Example
SYS_MODULE_OBJ object; // Returned from DRV_SDCARD_Initialize
SYS_STATUS status;
status = DRV_SDCARD_Status(object);
else if (SYS_STATUS_ERROR >= status)
{
// Handle error
}
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5.1.8.7.1.5 DRV_SDCARD_Tasks Function
C
void DRV_SDCARD_Tasks(
SYS_MODULE_OBJ object
);
Description
This routine is used to maintain the driver's internal state machine.
Preconditions
The DRV_SDCARD_Initialize routine must have been called for the specified SDCARD driver instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from
DRV_SDCARD_Initialize)
Returns
None
Remarks
This routine is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
appropriate raw ISR.
This routine may execute in an ISR context and will never block or access any resources that may cause it to block.
Example
SYS_MODULE_OBJ object; // Returned from DRV_SDCARD_Initialize
while (true)
{
DRV_SDCARD_Tasks (object);
// Do other tasks
}
5.1.8.7.2 Client Level Functions
5.1.8.7.2.1 DRV_SDCARD_ClientStatus Function
C
DRV_SDCARD_CLIENT_STATUS DRV_SDCARD_ClientStatus(
DRV_HANDLE handle
);
Description
This routine gets the client-specific status of the SD Card driver associated with the given handle.
Preconditions
The DRV_SDCARD_Initialize routine must have been called.
DRV_SDCARD_Open must have been called to obtain a valid opened device handle.
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Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
A DRV_SDCARD_CLIENT_STATUS value describing the current status of the driver
Remarks
This routine will not block for hardware access and will immediately return the current status.
Example
DRV_HANDLE sdcardHandle; // Returned from DRV_SDCARD_Open
DRV_SDCARD_CLIENT_STATUS sdcardClientStatus;
sdcardClientStatus = DRV_SDCARD_ClientStatus ( sdcardHandle );
if ( DRV_SDCARD_CLIENT_STATUS_ERROR >= sdcardClientStatus )
{
// Handle the error
}
5.1.8.7.2.2 DRV_SDCARD_Close Function
C
void DRV_SDCARD_Close(
DRV_HANDLE handle
);
Description
This routine closes an opened-instance of the SD Card driver, invalidating the handle.
Preconditions
The DRV_SDCARD_Initialize routine must have been called for the specified SD Card driver instance.
DRV_SDCARD_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
None
Remarks
After calling this routine, the handle passed in "handle" must not be used with any of the remaining driver routines. A new handle
must be obtained by calling DRV_SDCARD_Open before the caller may use the driver again.
If DRV_IO_INTENT_BLOCKING was requested and the driver was built appropriately to support blocking behavior call may
block until the operation is complete.
If DRV_IO_INTENT_NON_BLOCKING request the driver client can call the DRV_SDCARD_Status operation to find out when
the module is in the ready state (the handle is no longer valid).
Usually there is no need for the driver client to verify that the Close operation has completed.
Example
DRV_HANDLE handle; // Returned from DRV_SDCARD_Open
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DRV_SDCARD_Close ( handle );
5.1.8.7.2.3 DRV_SDCARD_Open Function
C
DRV_HANDLE DRV_SDCARD_Open(
const SYS_MODULE_INDEX drvIndex,
const DRV_IO_INTENT intent
);
Description
This routine opens the specified SD Card driver instance and provides a handle that must be provided to all other client-level
operations to identify the caller and the instance of the driver.
Preconditions
Function DRV_SDCARD_Initialize must have been called before calling this function.
Parameters
Parameters Description
drvIndex Identifier for the object instance to be opened
intent Zero or more of the values from the enumeration DRV_IO_INTENT "or'd" together
to indicate the intended use of the driver
Returns
If successful, the routine returns a valid open-instance handle (a number identifying both the caller and the module instance).
If an error occurs, the return value is DRV_HANDLE_INVALID.
Remarks
The handle returned is valid until the DRV_SDCARD_Close routine is called.
This routine will NEVER block waiting for hardware.
If the DRV_IO_INTENT_BLOCKING is requested and the driver was built appropriately to support blocking behavior, then other
client-level operations may block waiting on hardware until they are complete.
If DRV_IO_INTENT_NON_BLOCKING is requested the driver client can call the DRV_SDCARD_ClientStatus operation to find
out when the module is in the ready state.
If the requested intent flags are not supported, the routine will return DRV_HANDLE_INVALID.
Example
DRV_HANDLE handle;
handle = DRV_SDCARD_Open ( DRV_SDCARD_INDEX_0, DRV_IO_INTENT_EXCLUSIVE );
if ( DRV_HANDLE_INVALID == handle )
{
// Unable to open the driver
}
5.1.8.7.3 Operation Functions
5.1.8.7.3.1 DRV_SDCARD_SectorRead Function
C
SYS_FS_MEDIA_BUFFER_HANDLE DRV_SDCARD_SectorRead(
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DRV_HANDLE handle,
uint8_t * buffer,
uint32_t sector_addr,
uint32_t sectorCount
);
Description
This function reads data from the sectors of the SD card starting from the sector address and stores it in the location pointed by
'buffer'.
Preconditions
The DRV_SDCARD_Initialize routine must have been called.
DRV_SDCARD_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
sector_addr The address of the sector on the card.
sectorCount Number of sectors to be read.
buffer The buffer where the retrieved data will be stored. If buffer is NULL, do not store
the data anywhere.
Returns
SYS_FS_MEDIA_BUFFER_HANDLE - Buffer handle.
Remarks
This routine will not block for hardware access and will immediately return the current status.
Example
SYS_FS_MEDIA_BUFFER_HANDLE bufferHandle;
bufferHandle = DRV_SDCARD_SectorRead ( handle,
,readData //buffer
, 20 // Sector
, 1 // Number of Sectors
);
5.1.8.7.3.2 DRV_SDCARD_SectorWrite Function
C
SYS_FS_MEDIA_BUFFER_HANDLE DRV_SDCARD_SectorWrite(
DRV_HANDLE handle,
uint32_t sector_addr,
uint8_t * buffer,
uint32_t sectorCount
);
Description
This function writes sector(s) of data (512 bytes) of data from the location pointed to by 'buffer' to the specified sector of the SD
card.
Preconditions
The DRV_SDCARD_Initialize routine must have been called.
DRV_SDCARD_Open must have been called to obtain a valid opened device handle.
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Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
sector_addr The address of the sector on the card.
buffer The buffer with the data to write.
Returns
SYS_FS_MEDIA_BUFFER_HANDLE - Buffer handle.
Remarks
The card expects the address field in the command packet to be a byte address. The sector_addr value is converted to a byte
address by shifting it left nine times (multiplying by 512).
Example
SYS_FS_MEDIA_BUFFER_HANDLE bufferHandle;
bufferHandle = DRV_SDCARD_SectorWrite ( handle,
,readData //buffer
, 20 // Sector
, 1 // Number of Sectors
);
5.1.8.7.3.3 DRV_SDCARD_BufferStatusGet Function
C
SYS_FS_MEDIA_BUFFER_STATUS DRV_SDCARD_BufferStatusGet(
DRV_HANDLE handle,
SYS_FS_MEDIA_BUFFER_HANDLE bufferHandle
);
Description
This function gets the status of an an SD card operation (read/write). To be called only after a read or write is scheduled.
Preconditions
The DRV_SDCARD_Initialize routine must have been called.
DRV_SDCARD_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
bufferHandle Handle returned by a 'sector write' or a 'sector read' function.
Returns
SYS_FS_MEDIA_BUFFER_STATUS - Buffer status.
Remarks
None.
Example
int globalState = 0;
SYS_FS_MEDIA_BUFFER_HANDLE bufferHandle;
switch (globalState)
{
case 0:
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bufferHandle = SYS_FS_MEDIA_MANAGER_SectorWrite ( handle,
,readData //buffer
, 20 // Sector
, 1 // Number of Sectors
);
globalState++;
break;
case 1:
if ( SYS_FS_MEDIA_MANAGER_BufferStatusGet(handle, bufferHandle) ==
SYS_FS_MEDIA_BUFFER_COMPLETED)
{
//Write complete
}
break;
5.1.8.7.3.4 DRV_SDCARD_MediaStatusGet Function
C
SYS_FS_MEDIA_STATUS DRV_SDCARD_MediaStatusGet(
DRV_HANDLE handle
);
Description
This function gets the status of the device ( attached/detached ).
Preconditions
The DRV_SDCARD_Initialize routine must have been called.
DRV_SDCARD_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
SYS_FS_MEDIA_STATUS - Status of the device.
Remarks
None.
Example
DRV_HANDLE sdcardHandle; // Returned from DRV_SDCARD_Open
if( DRV_SDCARD_MediaStatusGet ( handle ) == SYS_FS_MEDIA_ATTACHED )
{
//Device is attached
}
5.1.8.7.4 Module Information Functions
5.1.8.7.4.1 DRV_SDCARD_SectorsCountGet Function
C
uint32_t DRV_SDCARD_SectorsCountGet(
DRV_HANDLE handle
);
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Description
This function gets the number of sectors present in the selected SD card device.
Preconditions
The DRV_SDCARD_Initialize routine must have been called.
DRV_SDCARD_Open must have been called to obtain a valid opened device handle.
SD Card must have been detected and initialized by the task routine.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
The number of a sectors in the selected SD Card.
Remarks
This routine will not block for hardware access and will immediately return the current status.
Example
DRV_HANDLE sdcardHandle; // Returned from DRV_SDCARD_Open
DRV_SDCARD_CLIENT_STATUS sdcardClientStatus;
bool status;
5.1.8.7.4.2 DRV_SDCARD_SectorSizeGet Function
C
uint32_t DRV_SDCARD_SectorSizeGet(
DRV_HANDLE handle
);
Description
This function gets the card's sector size.
Preconditions
The DRV_SDCARD_Initialize routine must have been called.
DRV_SDCARD_Open must have been called to obtain a valid opened device handle.
SD Card must have been detected and initialized by the task routine.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
The size of a sector in the selected SD Card.
Remarks
This routine will not block for hardware access and will immediately return the current status.
Example
DRV_HANDLE sdcardHandle; // Returned from DRV_SDCARD_Open
DRV_SDCARD_CLIENT_STATUS sdcardClientStatus;
bool status;
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5.1.8.7.4.3 DRV_SDCARD_WriteProtectionIsEnabled Function
C
bool DRV_SDCARD_WriteProtectionIsEnabled(
DRV_HANDLE handle
);
Description
This function returns 'true' if the write protection for the card is enabled.
Preconditions
The DRV_SDCARD_Initialize routine must have been called.
DRV_SDCARD_Open must have been called to obtain a valid opened device handle.
SD Card must have been detected and initialized by the task routine.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
true - Write protection is enabled. false - Write protection is disabled.
Remarks
This routine will not block for hardware access and will immediately return the current status.
Example
DRV_HANDLE sdcardHandle; // Returned from DRV_SDCARD_Open
bool writeProtectStatus;
//Call DRV_SDCARD_Open
writeProtectStatus = DRV_SDCARD_WriteProtectionIsEnabled(sdcardHandle);
5.1.8.7.5 Version Information Functions
5.1.8.7.5.1 DRV_SDCARD_VersionGet Function
C
unsigned int DRV_SDCARD_VersionGet(
const SYS_MODULE_INDEX drvIndex
);
Description
This routine gets the SD card driver version. The version is encoded as major * 10000 + minor * 100 + patch. The stringized
version can be obtained using DRV_SDCARD_VersionStrGet()
Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the object instance to get the version for.
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Returns
Current driver version in numerical format.
Remarks
None.
Example
unsigned int version;
version = DRV_SDCARD_VersionGet( DRV_SDCARD_INDEX_1 );
if(version < 110200)
{
// Do Something
}
5.1.8.7.5.2 DRV_SDCARD_VersionStrGet Function
C
char* DRV_SDCARD_VersionStrGet(
const SYS_MODULE_INDEX drvIndex
);
Description
This routine gets the SD card driver version. The version is returned as major.minor.path[type], where type is optional. The
numerical version can be obtained using DRV_SDCARD_VersionGet()
Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the object instance to get the version for.
Returns
Current SD card driver version in the string format.
Remarks
None.
Example
char *version;
version = DRV_SDCARD_VersionStrGet( DRV_SDCARD_INDEX_1 );
printf("%s", version);
5.1.8.7.6 Data Types and Constants
5.1.8.7.6.1 DRV_SDCARD_INDEX_0 Macro
C
#define DRV_SDCARD_INDEX_0 0
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Description
SD Card Driver Module Index Numbers
These constants provide SD Card driver index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals.
These values should be passed into the DRV_SDCARD_Initialize and DRV_SDCARD_Open routines to identify the driver
instance in use.
5.1.8.7.6.2 DRV_SDCARD_INDEX_COUNT Macro
C
#define DRV_SDCARD_INDEX_COUNT DRV_SDCARD_INDEX_MAX
Description
SD Card Driver Module Index Count
This constant identifies number of valid SD Card driver indices.
Remarks
This constant should be used in place of hard-coded numeric literals.
This value is derived from part-specific header files defined as part of the peripheral libraries.
5.1.8.7.6.3 DRV_SDCARD_BUFFER_HANDLE Type
C
typedef uintptr_t DRV_SDCARD_BUFFER_HANDLE;
Description
SD Card Buffer Handle
This handle identifies the a buffer in the queue(read or write).
5.1.8.7.6.4 DRV_SDCARD_CLIENT_STATUS Enumeration
C
typedef enum {
DRV_SDCARD_CLIENT_STATUS_INVALID,
DRV_SDCARD_CLIENT_STATUS_ERROR,
DRV_SDCARD_CLIENT_STATUS_CLOSED,
DRV_SDCARD_CLIENT_STATUS_BUSY,
DRV_SDCARD_CLIENT_STATUS_READY,
DRV_SDCARD_CLIENT_STATUS_STOPPED
} DRV_SDCARD_CLIENT_STATUS;
Description
SD Card Driver Client Status
This enumeration identifies the client-specific status of the SD card driver.
Members
Members Description
DRV_SDCARD_CLIENT_STATUS_INVALID Client in an invalid state
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DRV_SDCARD_CLIENT_STATUS_ERROR Unspecified error condition
DRV_SDCARD_CLIENT_STATUS_CLOSED Client is not open
DRV_SDCARD_CLIENT_STATUS_BUSY An operation is currently in progress
DRV_SDCARD_CLIENT_STATUS_READY Up and running, no operations running
DRV_SDCARD_CLIENT_STATUS_STOPPED SD Card stopped (not running), but ready to accept commands
Remarks
None.
5.1.8.7.6.5 DRV_SDCARD_INIT Type
C
typedef struct _DRV_SDCARD_INIT DRV_SDCARD_INIT;
Description
SD Card Device Driver Initialization Data
This structure contains all the data necessary to initialize the SD Card device.
Remarks
A pointer to a structure of this format containing the desired initialization data must be passed into the DRV_SDCARD_Initialize
routine.
5.1.8.7.6.6 SYS_MEDIA_EVENT Enumeration
C
typedef enum {
SYS_MEDIA_EVENT_SDCARD_ATTACHED,
SYS_MEDIA_EVENT_SDCARD_DETACHED
} SYS_MEDIA_EVENT;
Description
SD Card Buffer Status
Defines the states that an SD Card buffer can be in during its lifetime
Members
Members Description
SYS_MEDIA_EVENT_SDCARD_ATTACHED The media event is SD Card attach
SYS_MEDIA_EVENT_SDCARD_DETACHED The media event is SD Card detach
Remarks
As buffers may have a limited life span, so too have the associated handles and status info. Once a buffer transfer is completed
(and possibly notified and acknowledged) it will be discarded. The status of a discarded buffer is no longer maintained by the
driver.
5.1.8.7.6.7 SDCARD_MAX_LIMIT Macro
C
#define SDCARD_MAX_LIMIT 2
Description
SD Card Driver Maximum allowed limit
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This constant identifies number of valid SD Card driver indices.
Remarks
This constant should be used in place of hard-coded numeric literals.
This value is derived from part-specific header files defined as part of the peripheral libraries.
5.1.8.7.6.8 DRV_SDCARD_INDEX_1 Macro
C
#define DRV_SDCARD_INDEX_1 1
Description
This is macro DRV_SDCARD_INDEX_1.
5.1.8.7.6.9 DRV_SDCARD_INDEX_2 Macro
C
#define DRV_SDCARD_INDEX_2 2
Description
This is macro DRV_SDCARD_INDEX_2.
5.1.8.7.6.10 DRV_SDCARD_INDEX_3 Macro
C
#define DRV_SDCARD_INDEX_3 3
Description
This is macro DRV_SDCARD_INDEX_3.
5.1.8.8 Files
Files
Name Description
drv_sdcard.h SD Card Device Driver Interface File
Description
5.1.8.8.1 drv_sdcard.h
SD Card Device Driver Interface
The SD Card device driver provides a simple interface to manage the "SD Card" peripheral. This file defines the interface
definitions and prototypes for the SD Card driver.
Enumerations
Name Description
DRV_SDCARD_CLIENT_STATUS Identifies the client-specific status of the SD card driver
SYS_MEDIA_EVENT Defines the buffer status
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Functions
Name Description
DRV_SDCARD_BufferStatusGet Gets the status of an an SD card operation (read/write)
DRV_SDCARD_ClientStatus Gets current client-specific status the SD Card driver
DRV_SDCARD_Close Closes an opened-instance of the SD Card driver
DRV_SDCARD_Deinitialize Deinitializes the specified instance of the SD Card driver module
DRV_SDCARD_Initialize Initializes the SD Card driver
DRV_SDCARD_MediaStatusGet Gets the status of the device.
DRV_SDCARD_Open Opens the specified SD Card driver instance and returns a handle to it
DRV_SDCARD_Reinitialize Reinitializes the driver and refreshes any associated hardware settings
DRV_SDCARD_SectorRead Reads data from the sectors of the SD card.
DRV_SDCARD_SectorsCountGet Gets the number of sectors present in the selected SD card device.
DRV_SDCARD_SectorSizeGet Gets the sector size of the selected SD card device.
DRV_SDCARD_SectorWrite Writes sector(s) of data to an SD card.
DRV_SDCARD_Status Provides the current status of the SD Card driver module
DRV_SDCARD_Tasks Maintains the driver's state machine
DRV_SDCARD_VersionGet Gets SD card driver version in numerical format.
DRV_SDCARD_VersionStrGet Gets SD card driver version in string format.
DRV_SDCARD_WriteProtectionIsEnabled Gets the status of write protection.
Macros
Name Description
DRV_SDCARD_INDEX_0 SD Card driver index definitions
DRV_SDCARD_INDEX_1 This is macro DRV_SDCARD_INDEX_1.
DRV_SDCARD_INDEX_2 This is macro DRV_SDCARD_INDEX_2.
DRV_SDCARD_INDEX_3 This is macro DRV_SDCARD_INDEX_3.
DRV_SDCARD_INDEX_COUNT Number of valid SD Card driver indices
SDCARD_MAX_LIMIT Maximum allowed SD card instances
Types
Name Description
DRV_SDCARD_BUFFER_HANDLE Handle to a buffer added to the process queue.
DRV_SDCARD_INIT Contains all the data necessary to initialize the SD Card device
Company
Microchip Technology Incorporated
FileName: drv_sdcard.h
5.1.9 SPI Driver Library
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5.1.9.1 Introduction
SPI Driver Library
for
Microchip Microcontrollers
This library provides an interface to manage the Serial Peripheral Interface (SPI) module on the Microchip family of
microcontrollers in different modes of operation.
Description
Overview
The SPI module is a full duplex synchronous serial interface useful for communicating with other peripherals or microcontrollers
in master/slave relationship and it can transfer data over short distances at high speeds. The peripheral devices may be serial
EEPROMs, shift registers, display drivers, analog-to-digital converters, etc. The SPI module is compatible with Motorola’s SPI
and SIOP interfaces.
During data transfer devices can work either in master or in Slave mode. The source of synchronization is the system clock,
which is generated by the master. The SPI module allows to connect one or more slave devices to a single master device via the
same bus.
The SPI serial interface consists of four pins, which are further sub-divided into data and control lines:
Data lines:
• MOSI – Master Data Output, Slave Data Input
• MISO – Master Data Input, Slave Data Output
Control lines:
• SCLK – Serial Clock
• /SS – Slave Select (no addressing)
SPI Master-Slave Relationship
The SPI module can be configured to operate using 2, 3 or 4 pins. In the 3-pin mode, slave select line is not used. In the 2-pin
mode, both MOSI and SS lines are not used.
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Note: Third-party trademarks are property of their respective owners.
5.1.9.2 Release Notes
MPLAB Harmony Version: v0.70b SPI Driver Library Version : 0.01 Release Date: 18Nov2013
New This Release:
• Configurable baud rate at client level
• Interoperability
Known Issues:
• Does not work in the Slave mode of operation
• DMA is not supported
5.1.9.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED AS IS MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.9.4 Using the Library
This topic describes the basic architecture of the SPI Driver Library and provides information and examples on how to use it.
Interface Header File: drv_spi.h
The interface to the SPI Driver library is defined in the "drv_spi.h" header file. Any C language source (.c) file that uses the SPI
Driver library should include this header.
Library File:
The SPI Driver library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the Driver interacts with the framework.
5.1.9.4.1 Abstraction Model
Different types of SPIs are available on Microchip microcontrollers. Some have an internal buffer mechanism and some do not.
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The buffer depth varies across part families. The SPI driver abstracts out these differences and provides a unified model for data
transfer across different types of SPIs available.
Both transmitter and receiver provides a buffer in the driver which transmits and receives data to/from the hardware. The SPI
driver provides a set of interfaces to perform the read and the write.
The diagrams below illustrates the model used by the SPI driver for transmitter and receiver.
Receiver Abstraction Model
Transmitter Abstraction Model
5.1.9.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various subsections, each of the sub section addresses one of the blocks or the
overall operation of the SPI module.
Library Interface Section Description
System Interaction Functions Provides system module interfaces, device initialization, deinitialization,
reinitialization, tasks and status functions.
Client Setup Functions Provides open, close, status and other setup functions.
Chip Selects Provides chip select functions available in the configuration.
Client Data Transfer - Core Provides core data transfer functions available in the configuration.
[Standard/Single buffer transfer]
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Client Data Transfer - Advanced Provides advanced data transfer functions available in the configuration.
[Enhanced/Multi buffer transfers]
Miscellaneous Provides driver miscellaneous functions, data transfer status function,
version identification functions etc.
5.1.9.4.3 How the Library Works
The library provides interfaces to support:
• System Functionality
• Client Functionality
Note: Not all modes are available on all microcontrollers, please refer to the specific device data sheet to the modes that are
supported for your device.
5.1.9.4.3.1 System Access
System Initialization and Re-initialization
The system performs the initialization and the re-initialization of the device driver with settings that affect only the instance of the
device that is being initialized or re-initialized. During system initialization each instance of the SPI module would be initialized
with the following configuration settings (either passed dynamically at run time using DRV_SPI_INIT or by using Initialization
Overrides) that are supported by the specific SPI device hardware:
• Device requested power state: one of the System Module Power States. For specific details please refer to the Data Types
section in this guide
• The actual peripheral ID enumerated as the PLIB level module ID. e.g SPI_ID_2.
• Defining the respective interrupt sources for Tx, Rx, and Error Interrupt.
The DRV_SPI_Initialize API returns an object handle of the type SYS_MODULE_OBJ. There on, the object handle returned by
the Initialize interface would be used by the other system interfaces like DRV_SPI_Reinitialize, DRV_SPI_Deinitialize,
DRV_SPI_Status and DRV_SPI_Tasks.
Note:The system initialization and the re-initialization settings, only effect the instance of the peripheral that is being initialized or
re-initialized.
Example:
DRV_SPI_INIT spiInitData;
SYS_MODULE_OBJ objectHandle;
spiInitData.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
spiInitData.spiId = SPI_ID_1;
spiInitData.spiMode = DRV_SPI_MODE_MASTER;
spiInitData.spiProtocolType = DRV_SPI_PROTOCOL_TYPE_STANDARD;
spiInitData.commWidth = SPI_COMMUNICATION_8BIT_WIDE;
spiInitData.baudRate = 5000;
spiInitData.bufferType = DRV_SPI_BUFFER_TYPE_STANDARD;
spiInitData.inputSamplePhase = SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE;
spiInitData.clockMode = DRV_SPI_CLOCK_MODE_IDLE_LOW_EDGE_RISE;
spiInitData.txInterruptSource = INT_SOURCE_SPI_1_TRANSMIT; // INT_SOURCE_SPI_1_EVENT
spiInitData.rxInterruptSource = INT_SOURCE_SPI_1_RECEIVE; // INT_SOURCE_SPI_1_EVENT
spiInitData.errInterruptSource = INT_SOURCE_SPI_1_ERROR;
spiInitData.pinConfig.sdiPin = PIN_6; // RPI38
spiInitData.pinConfig.sdoPin = PIN_10; // RP21
spiInitData.pinConfig.sckPin = PIN_11; // RP26
objectHandle = DRV_SPI_Initialize(DRV_SPI_INDEX_1, (SYS_MODULE_INIT*)&spiInitData);
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if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
Tasks Routine
The system will either call DRV_SPI_Tasks, from System Task Service (in a polled environment) or DRV_SPI_Tasks will be
called from interrupt service routine of the SPI.
5.1.9.4.3.2 Client Access
General Client Operation
For the application to start using an instance of the module, it must call the DRV_SPI_Open function. This provides the
configuration required to open the SPI instance for operation. If the driver is de-initialized using the function
DRV_SPI_Deinitialize, the application must call the DRV_SPI_Open function again to setup the instance of the SPI. The function
DRV_SPI_Open need not be called again if the system is re-initialized using the DRV_SPI_Reinitialize function.
For the various options available for IO INTENT please refer to the Data Types section in this guide.
Example:
DRV_HANDLE handle;
// Configure the instance DRV_SPI_INDEX_1 with the configuration
handle = DRV_SPI_Open(DRV_SPI_INDEX_1, DRV_IO_INTENT_READWRITE);
if(handle == DRV_HANDLE_INVALID)
{
// Client cannot open the instance.
}
Communication Setup:
Communication entities like the SPI modes, input clock frequency, baud rates, clock mode, ports setup etc. can be configured
with the help of the driver function DRV_SPI_CommunicationSetup. This is a mandatory setup before doing any data transfer.
The callback function registered during the communication setup gets called after a successful data transfer.
Example:
DRV_HANDLE handle; // Returned from DRV_SPI_Open
DRV_SPI_COMM_CONFIG config;
// Populate the communication setup configuration structure
config.spiMode = DRV_SPI_MODE_MASTER;
config.baudRate = 5000;
config.inputSamplePhase = SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE;
config.clockMode = DRV_SPI_CLOCK_MODE_IDLE_LOW_EDGE_RISE;
config.callback = &callBackFunction; // callback registered
DRV_SPI_CommunicationSetup( handle, &config );
Chip Select Control:
User can control the chip/slave select signals using the driver APIs DRV_SPI_ChipSelectActivate and
DRV_SPI_ChipSelectDeactivate with appropriate parameters.
Example:
// Activates/Enables Slave Select connected to Port A, bit 1
DRV_SPI_ChipSelectActivate( handle, PORT_CHANNEL_A, PORTS_BIT_POS_1 );
...
...
...
// Deactivates/Disables Slave Select connected to Port A, bit 1
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DRV_SPI_ChipSelectDeactivate( handle, PORT_CHANNEL_A, PORTS_BIT_POS_1 );
5.1.9.4.3.3 Cient Transfer - Core
Client basic functionality provides a extremely basic interface for the driver operation.
This client transfer mechanism needs to be used for the devices which support the
'Standard' SPI mode of operation [Single Buffer]. This mechanism needs to be repeated in case of buffer
based data transfers for transferring multi bytes/words.
The diagram below illustrates the byte/word model used for the data transfer.
Note: It is not necessary to close and re-open the client between multiple transfers.
Client Byte/Word transfer Functionality
Application using the SPI byte/word functionality, needs to perform the following:
1. The system should have completed necessary initialization and the DRV_SPI_Tasks should either be running in polled
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environment, or in an interrupt environment.
2. Open the driver using DRV_SPI_Open with the necessary intent
3. Setup the communication using the driver function DRV_SPI_CommunicationSetup
4. Enable/activate the slave using the function DRV_SPI_ChipSelectActivate
5. Put/Write a byte using DRV_SPI_Put, dummy byte in case of read only
6. Check for the current transfer status using DRV_SPI_TransferStatus until the transfer is in progress
DRV_SPI_TRANSFER_STATUS_IN_PROGRESS, call the DRV_SPI_Tasks in case of a polled environment until the transfer
is success
7. Get/Read the dummy/valid data using the function DRV_SPI_Get
8. Repeat from step 5 till 7 to handle buffer transmission and reception using standard mode
9. Disable/deactivate the slave using the function DRV_SPI_ChipSelectDeactivate
10. The client will be able to close the driver using the DRV_SPI_Close when required.
Example:
DRV_HANDLE handle; // Returned from DRV_SPI_Open
SPI_BUFFER myBuffer[MY_BUFFER_SIZE];
unsigned int numBytes;
DRV_SPI_COMM_CONFIG config;
// Pre-initialize myBuffer with MY_BUFFER_SIZE bytes of valid data.
while( 1 )
{
switch( state )
{
case APP_STATE_INIT:
/* Initialize the SPI Driver */
object = DRV_SPI_Initialize( sysIndex, ( SYS_MODULE_INIT * )&initConf );
/* Check for the System Status */
if( SYS_STATUS_READY != DRV_SPI_Status( object ) )
return 0;
/* Open the Driver */
clHandle = DRV_SPI_Open( sysIndex, DRV_IO_INTENT_EXCLUSIVE );
/* Check for the Client Open Status */
if( DRV_SPI_CLIENT_STATUS_READY != DRV_SPI_ClientStatus( clHandle ) )
return 0;
/* Set up the communication medium */
DRV_SPI_CommunicationSetup( clHandle, &commConf );
/* Update the state to transfer data */
state = APP_STATE_DATA_PUT;
break;
case APP_STATE_DATA_PUT:
/* Enable/Activate the CS */
DRV_SPI_ChipSelectActivate( handle, PORT_CHANNEL_A, PORTS_BIT_POS_1 );
/* Initiate the data transfer */
DRV_SPI_Put( clHandle, myBuffer[i++] );
/* Deactivates/Disables CS */
DRV_SPI_ChipSelectDeactivate( handle, PORT_CHANNEL_A, PORTS_BIT_POS_1 );
/* Update the state to status check */
state = APP_STATE_STATUS_CHECK;
break;
case APP_STATE_STATUS_CHECK:
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/* Check for the successful data transfer */
if( DRV_SPI_TRANSFER_STATUS_IN_PROGRESS & DRV_SPI_TransferStatus( clHandle ) )
{
DRV_SPI_Tasks (object);
/* Stay here until the data transfer is executed */
state = APP_STATE_STATUS_CHECK;
}
else
{
/* Data transfer was successfull, get the data */
state = APP_STATE_DATA_GET;
}
break;
case APP_STATE_DATA_GET:
/* Read the data from the peripheral */
rxd_data = DRV_SPI_Get( clHandle );
/* Restart the process by jumping to the beginning state */
state = APP_STATE_DATA_PUT;
break;
default:
break;
}
}
Note: 'bufferType' attribute of the initialization structure or the configuration macro 'DRV_SPI_BUFFER_USAGE_TYPE' needs to
be updated as DRV_SPI_BUFFER_TYPE_STANDARD
5.1.9.4.3.4 Client Transfer - Advanced
Client basic functionality provides a extremely basic interface for the driver operation.
This client transfer mechanism needs to be used for the devices which support the
'Enhanced' SPI mode of operation [Internal FIFO or buffer].
The diagram below illustrates the buffer model used for the data transfer.
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Note: It is not necessary to close and re-open the client between multiple transfers.
Client Byte/Word transfer Functionality
Application using the SPI byte/word functionality, needs to perform the following:
1. The system should have completed necessary initialization and the DRV_SPI_Tasks should either be running in polled
environment, or in an interrupt environment.
2. Open the driver using DRV_SPI_Open with the necessary intent
3. Setup the communication using the driver function DRV_SPI_CommunicationSetup
4. Enable/activate the slave using the function DRV_SPI_ChipSelectActivate
5. Put/Write a byte using DRV_SPI_PutBuffer, dummy byte in case of read only
6. Check for the current transfer status using DRV_SPI_TransferStatus until the transfer is in progress
DRV_SPI_TRANSFER_STATUS_IN_PROGRESS, call the DRV_SPI_Tasks in case of a polled environment until the transfer
is success
7. Get/Read the dummy/valid data using the function DRV_SPI_GetBuffer
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8. Repeat from step 5 till 7 to handle multi buffer transmission and reception using enhanced mode
9. Disable/deactivate the slave using the function DRV_SPI_ChipSelectDeactivate
10. The client will be able to close the driver using the DRV_SPI_Close when required.
Example:
DRV_HANDLE handle; // Returned from DRV_SPI_Open
SPI_DATA_TYPE tx_buffer[DRV_SPI_BUFFER_SIZE] = { 0x0001, 0x0001, 0x0001, 0x0001 };
SPI_DATA_TYPE rx_buffer[DRV_SPI_BUFFER_SIZE];
unsigned int numBytes;
DRV_SPI_COMM_CONFIG config;
// Pre-initialize tx_buffer with DRV_SPI_BUFFER_SIZE bytes of valid data.
while( 1 )
{
switch( state )
{
case APP_STATE_INIT:
/* Initialize the SPI Driver */
object = DRV_SPI_Initialize( sysIndex, ( SYS_MODULE_INIT * )&initConf );
/* Check for the System Status */
if( SYS_STATUS_READY != DRV_SPI_Status( object ) )
return 0;
/* Open the Driver */
clHandle = DRV_SPI_Open( sysIndex, DRV_IO_INTENT_EXCLUSIVE );
/* Check for the Client Open Status */
if( DRV_SPI_CLIENT_STATUS_READY != DRV_SPI_ClientStatus( clHandle ) )
return 0;
/* Set up the communication medium */
DRV_SPI_CommunicationSetup( clHandle, &commConf );
/* Update the state to transfer data */
state = APP_STATE_BUFFER_PUT;
break;
case APP_STATE_BUFFER_PUT:
/* Initiate the data transfer */
DRV_SPI_PutBuffer( clHandle, &tx_buffer, sizeof( tx_buffer )/2 );
/* Update the state to status check */
state = APP_STATE_BUFFER_CHECK;
break;
case APP_STATE_BUFFER_CHECK:
/* Check for the successful data transfer */
if( DRV_SPI_TRANSFER_STATUS_IN_PROGRESS & DRV_SPI_TransferStatus( clHandle ) )
{
DRV_SPI_Tasks (object);
/* Stay here until the data transfer is executed */
state = APP_STATE_BUFFER_CHECK;
}
else
{
/* Data transfer was successfull, get the data */
state = APP_STATE_BUFFER_GET;
}
break;
case APP_STATE_BUFFER_GET:
/* Read the data from the peripheral */
DRV_SPI_GetBuffer( clHandle, &rx_buffer, sizeof( rx_buffer )/2 );
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/* Restart the process by jumping to the beginning state */
state = APP_STATE_BUFFER_PUT;
break;
default:
break;
}
}
Note: 'bufferType' attribute of the initialization structure or the configuration macro 'DRV_SPI_BUFFER_USAGE_TYPE' needs to
be updated as DRV_SPI_BUFFER_TYPE_ENHANCED
5.1.9.5 Configuring the Library
The configuration of the SPI driver is based on the file sys_config.h
This header file contains the configuration selection for the SPI driver. Based on the selections made, the SPI driver will support
or not support selected features. These configuration settings will apply to all instances of the SPI driver.
This header can be placed anywhere, the path of this header needs to be present in the include search path for a successful
build. Refer to the Applications Overview section for more details.
5.1.9.5.1 Client Configuration
5.1.9.5.2 System Configuration
5.1.9.5.3 Miscellaneous Configuration
5.1.9.6 Building the Library
This section list the files that are available in the \src of the SPI driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.1.9.7 Library Interface
Data Types and Constants
Name Description
DRV_SPI_BAUD_RATE Controls the baud rate value of the SPI driver.
DRV_SPI_BAUD_RATE_CLOCK Selects the SPI baud rate clock.
DRV_SPI_BUFFER_HANDLE_INVALID Definition of an invalid buffer handle.
DRV_SPI_BUFFER_SIZE This is macro DRV_SPI_BUFFER_SIZE.
DRV_SPI_BUFFER_USAGE_TYPE Controls the buffer type of the SPI driver.
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DRV_SPI_CLIENTS_NUMBER Selects the miximum number of clients.
DRV_SPI_CLOCK_OPERATION_MODE Controls the clock mode of the SPI driver.
DRV_SPI_COMMUNICATION_WIDTH Controls the communication width of the SPI driver.
DRV_SPI_FRAME_SYNC_PULSE_COUNT Selects the SPI frame sync pulse count.
DRV_SPI_FRAME_SYNC_PULSE_DIRECTION Selects the SPI frame sync pulse direction.
DRV_SPI_FRAME_SYNC_PULSE_EDGE Selects the SPI frame sync pulse edge.
DRV_SPI_FRAME_SYNC_PULSE_POLARITY Selects the SPI frame sync pulse polarity.
DRV_SPI_FRAME_SYNC_PULSE_WIDTH Selects the SPI frame sync pulse width.
DRV_SPI_INDEX SPI static index selection.
DRV_SPI_INDEX_0 SPI driver index definitions.
DRV_SPI_INDEX_COUNT Number of valid SPI driver indices.
DRV_SPI_INPUT_SAMPLE_PHASE Selects the SPI input sample phase.
DRV_SPI_INSTANCES_NUMBER Selects the maximum number of hardware instances that can be
supported by the dynamic driver .
DRV_SPI_INTERRUPT_MODE Controls operation of the driver in the interrupt or polled mode.
DRV_SPI_INTERRUPT_SOURCE_ERROR Defines the error interrupt source in case of static driver
DRV_SPI_INTERRUPT_SOURCE_RX Defines the receive interrupt source in case of static driver.
DRV_SPI_INTERRUPT_SOURCE_TX Defines the transmit/receive or transmit alone interrupt source in
case of static driver.
DRV_SPI_PERIPHERAL_ID SPI peripheral ID selection.
DRV_SPI_PORTS_REMAP_USAGE Selects the SPI pins remap.
DRV_SPI_POWER_STATE Controls the power state of the SPI driver.
DRV_SPI_PROTOCOL Controls the protocol type of the SPI driver.
DRV_SPI_USAGE_MODE Controls the usage mode of the SPI driver.
DRV_SPI_BUFFER_EVENT Identifies the possible events that can result from a buffer add
request.
DRV_SPI_BUFFER_EVENT_HANDLER Pointer to a SPI Driver Buffer Event handler function
DRV_SPI_BUFFER_HANDLE Handle identifying a read or write buffer passed to the driver.
DRV_SPI_BUFFER_TYPE Identifies the various buffer types of the SPI module.
DRV_SPI_CLIENT_SETUP Defines the data required to initialize an SPI client.
DRV_SPI_CLOCK_MODE Identifies the various clock modes of the SPI module.
DRV_SPI_INIT Defines the data required to initialize or reinitialize the SPI driver
DRV_SPI_MODE Identifies the various usage modes of the SPI module.
DRV_SPI_PROTOCOL_TYPE Identifies the various protocols of the SPI module.
Client Setup Functions
Name Description
DRV_SPI_BufferStatus Returns the transmitter and receiver transfer status.
DRV_SPI_ClientSetup Initializes a client.
DRV_SPI_Close Closes an opened instance of the SPI driver
DRV_SPI_Open Opens the specified SPI driver instance and returns a handle to it.
Miscellaneous Functions
Name Description
DRV_SPI_BufferAddRead Registers a buffer for a read operation. Actual transfer will happen in
the Task function.
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DRV_SPI_BufferAddWrite Registers a buffer for a read operation. Actual transfer will happen in
the Task function.
DRV_SPI_BufferAddWriteRead Registers a buffer for a read operation. Actual transfer will happen in
the Task function.
DRV_SPI_VersionGet Gets the SPI driver version in numerical format.
DRV_SPI_VersionStrGet Gets the SPI driver version in string format.
DRV_SPI_INDEX_1 This is macro DRV_SPI_INDEX_1.
DRV_SPI_INDEX_2 This is macro DRV_SPI_INDEX_2.
DRV_SPI_INDEX_3 This is macro DRV_SPI_INDEX_3.
DRV_SPI_INDEX_4 This is macro DRV_SPI_INDEX_4.
DRV_SPI_INDEX_5 This is macro DRV_SPI_INDEX_5.
DRV_SPI_RX_FIFO_INTERRUPT_MODE This is macro DRV_SPI_RX_FIFO_INTERRUPT_MODE.
DRV_SPI_TX_FIFO_INTERRUPT_MODE This is macro DRV_SPI_TX_FIFO_INTERRUPT_MODE.
System Interaction Functions
Name Description
DRV_SPI_Deinitialize De-initializes the specified instance of the SPI driver module.
DRV_SPI_Initialize Initializes the SPI driver.
DRV_SPI_Status Provides the current status of the SPI driver module.
DRV_SPI_Tasks Maintains the driver's state machine and implements its ISR.
DRV_SPI_Read Gets/Reads byte(s) from SPI. The function will wait until the specified number of
bytes is received.
DRV_SPI_Write Writes the data to SPI. The function will wait until all the bytes are transmitted.
Description
This section describes the API functions of the SPI driver library.
Refer to each section for a detailed description.
5.1.9.7.1 System Interaction Functions
5.1.9.7.1.1 DRV_SPI_Deinitialize Function
C
void DRV_SPI_Deinitialize(
SYS_MODULE_OBJ object
);
Description
De-initializes the specified instance of the SPI driver module, disabling its operation (and any hardware) and invalidates all of the
internal data.
Preconditions
Function DRV_SPI_Initialize must have been called before calling this routine and a valid SYS_MODULE_OBJ must have been
returned.
Parameters
Parameters Description
object Driver object handle, returned from DRV_SPI_Initialize
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Returns
None.
Remarks
Once the Initialize operation has been called, the De-initialize operation must be called before the Initialize operation can be
called again.
This function will NEVER block waiting for hardware. If the operation requires time to allow the hardware to complete, this will be
reported by the DRV_SPI_Status operation. The system has to use DRV_SPI_Status to find out when the module is in the ready
state.
Example
SYS_MODULE_OBJ object; // Returned from DRV_SPI_Initialize
SYS_STATUS status;
DRV_SPI_Deinitialize ( object );
status = DRV_SPI_Status( object );
if( SYS_MODULE_UNINITIALIZED == status )
{
// Check again later if you need to know
// when the driver is de-initialized.
}
5.1.9.7.1.2 DRV_SPI_Initialize Function
C
SYS_MODULE_OBJ DRV_SPI_Initialize(
const SYS_MODULE_INDEX index,
const SYS_MODULE_INIT * const init
);
Description
This function initializes the SPI driver, making it ready for clients to open and use.
Preconditions
None.
Parameters
Parameters Description
drvIndex Index for the driver instance to be initialized
init Pointer to a data structure containing any data necessary to initialize the driver.
This pointer may be null if no data is required because static overrides have been
provided.
Returns
If successful, a valid handle to a driver object is returned. Otherwise, it returns SYS_MODULE_OBJ_INVALID. The returned
object must be passed as an argument to the DRV_SPI_Reinitialize, DRV_SPI_Deinitialize, DRV_SPI_Tasks, and
DRV_SPI_Status functions.
Remarks
This function must be called before any other SPI routine is called.
This function should only be called once during system initialization unless DRV_SPI_Deinitialize is called to de-initialize the
driver instance.
This function will NEVER block for hardware access. If the operation requires time to allow the hardware to reinitialize, it will be
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reported by the DRV_SPI_Status operation. The system must use DRV_SPI_Status to find out when the driver is in the ready
state.
Build configuration options may be used to statically override options in the "init" structure and will take precedence over
initialization data passed using this function.
Example
DRV_SPI_INIT init;
SYS_MODULE_OBJ objectHandle;
// Populate the SPI initialization structure
init.spiId = SPI_ID_1;
init.spiMode = DRV_SPI_MODE_MASTER;
init.spiProtocolType = DRV_SPI_PROTOCOL_TYPE_STANDARD;
init.commWidth = SPI_COMMUNICATION_8BIT_WIDE;
init.baudRate = 5000;
init.bufferType = DRV_SPI_BUFFER_TYPE_STANDARD;
init.inputSamplePhase = SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE;
init.clockMode = DRV_SPI_CLOCK_MODE_IDLE_LOW_EDGE_RISE;
init.txInterruptSource = INT_SOURCE_SPI_1_TRANSMIT; // INT_SOURCE_SPI_1_EVENT
init.rxInterruptSource = INT_SOURCE_SPI_1_RECEIVE; // INT_SOURCE_SPI_1_EVENT
init.errInterruptSource = INT_SOURCE_SPI_1_ERROR;
// Do something
objectHandle = DRV_SPI_Initialize( DRV_SPI_INDEX_0, (SYS_MODULE_INIT*)&init );
if( SYS_MODULE_OBJ_INVALID == objectHandle )
{
// Handle error
}
5.1.9.7.1.3 DRV_SPI_Status Function
C
SYS_STATUS DRV_SPI_Status(
SYS_MODULE_OBJ object
);
Description
This function provides the current status of the SPI driver module.
Preconditions
The DRV_SPI_Initialize function must have been called before calling this function.
Parameters
Parameters Description
object Driver object handle, returned from DRV_SPI_Initialize
Returns
SYS_STATUS_READY - Indicates that the driver is busy with a previous system level operation and cannot start another
Remarks
Any value greater than SYS_STATUS_READY is also a normal running state in which the driver is ready to accept new
operations.
SYS_MODULE_DEINITIALIZED - Indicates that the driver has been de-initialized
This value is less than SYS_STATUS_ERROR.
This function can be used to determine when any of the driver's module level operations has completed.
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If the status operation returns SYS_STATUS_BUSY, the previous operation has not yet completed. Once the status operation
returns SYS_STATUS_READY, any previous operations have completed.
The value of SYS_STATUS_ERROR is negative (-1). Any value less than that is also an error state.
This function will NEVER block waiting for hardware.
If the Status operation returns an error value, the error may be cleared by calling the reinitialize operation. If that fails, the
de-initialize operation will need to be called, followed by the initialize operation to return to normal operations.
Example
SYS_MODULE_OBJ object; // Returned from DRV_SPI_Initialize
SYS_STATUS status;
status = DRV_SPI_Status( object );
if( SYS_STATUS_READY != status )
{
// Handle error
}
5.1.9.7.1.4 DRV_SPI_Tasks Function
C
void DRV_SPI_Tasks(
SYS_MODULE_OBJ object
);
Description
This routine is used to maintain the driver's internal state machine and implement its transmit ISR for interrupt-driven
implementations. In polling mode, this function should be called from the SYS_Tasks() function. In interrupt mode, this function
should be called in the transmit interrupt service routine of the USART that is associated with this USART driver hardware
instance.
Preconditions
The DRV_SPI_Initialize routine must have been called for the specified SPI driver instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from DRV_SPI_Initialize)
Returns
None.
Remarks
This function is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
appropriate raw ISR.
This function may execute in an ISR context and will never block or access any resources that may cause it to block.
Example
SYS_MODULE_OBJ object; // Returned from DRV_SPI_Initialize
while( true )
{
DRV_SPI_Tasks ( object );
// Do other tasks
}
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5.1.9.7.1.5 DRV_SPI_Read Function
C
size_t DRV_SPI_Read(
DRV_HANDLE handle,
void* buffer,
size_t noOfBytes
);
Description
This function gets/reads byte(s) from SPI. The function will wait until the specified number of bytes is received.
Preconditions
The DRV_SPI_Initialize routine must have been called for the specified SPI driver instance.
DRV_SPI_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_READ or DRV_IO_INTENT_READWRITE must have been specified in the DRV_SPI_Open call.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
buffer Buffer to which the data should be written to.
noOfBytes Number of bytes to be received.
Returns
The number of bytes read.
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_SPI_Open function and the driver was built to support
blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_SPI_Open function or the driver was built to only
support non-blocking behavior the call will return immediately. If data is not available, a zero ('0') value will be returned and an
underrun error status will be captured. To ensure that valid data is returned, the caller must first check the return value to
DRV_SPI_BufferStatus, as shown in the example.
Example
DRV_HANDLE handle; // Returned from DRV_SPI_Open
SPI_DATA_TYPE myBuffer[MY_BUFFER_SIZE];
unsigned int numberOfBytesRead;
numberOfBytesRead = DRV_SPI_Read ( handle, myBuffer, 10 );
if ( numberOfBytesWritten == 0 )
{
// Check for the error...
}
5.1.9.7.1.6 DRV_SPI_Write Function
C
size_t DRV_SPI_Write(
DRV_HANDLE handle,
void* buffer,
size_t noOfBytes
);
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Description
This function Writes the data to SPI. The function will wait until all the bytes are transmitted.
Preconditions
The DRV_SPI_Initialize routine must have been called for the specified SPI driver instance.
DRV_SPI_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_WRITE or DRV_IO_INTENT_READWRITE must have been specified in the DRV_SPI_Open call.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
buffer Buffer which contains the data.
noOfBytes Number of bytes to be transmitted.
Returns
The number of bytes written.
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_SPI_Open function and the driver was built to support
blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_SPI_Open function or the driver was built to only
support non-blocking behavior the call will return immediately. If the driver was not able to accept the data, an overrun error
status will be captured. To ensure that the driver is ready to accept data, the caller must first check the return value to
DRV_SPI_BufferStatus, as shown in the example.
Example
DRV_HANDLE handle; // Returned from DRV_SPI_Open
SPI_DATA_TYPE myBuffer[MY_BUFFER_SIZE];//fill the data
unsigned int numberOfBytesWritten;
numberOfBytesWritten = DRV_SPI_Write ( handle, myBuffer, 10 );
if ( numberOfBytesWritten == 0 )
{
// Check the error...
}
5.1.9.7.2 Client Setup Functions
5.1.9.7.2.1 DRV_SPI_BufferStatus Function
C
DRV_SPI_BUFFER_EVENT DRV_SPI_BufferStatus(
DRV_SPI_BUFFER_HANDLE bufferHandle
);
Description
This returns the transmitter and receiver transfer status.
Preconditions
The DRV_SPI_Initialize routine must have been called for the specified SPI driver instance.
DRV_SPI_Open must have been called to obtain a valid opened device handle.
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Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
A DRV_SPI_BUFFER_STATUS value describing the current status of the transfer.
Remarks
The returned status may contain a value with more than one of the bits specified in the DRV_SPI_BUFFER_STATUS
enumeration set. The caller should perform an AND with the bit of interest and verify if the result is non-zero (as shown in the
example) to verify the desired status bit.
Example
DRV_HANDLE handle; // Returned from DRV_SPI_Open
if( DRV_SPI_BUFFER_STATUS_SUCCESS & DRV_SPI_BufferStatus( handle ) )
{
// All transmitter data has been sent.
}
5.1.9.7.2.2 DRV_SPI_ClientSetup Function
C
void DRV_SPI_ClientSetup(
DRV_HANDLE handle,
const DRV_SPI_CLIENT_SETUP * const clientSetup
);
Description
This function sets up the device communication parameters. Using this API user can have configurations like chip select and
baud rate specific to a client. The driver will be able to switch the between clients dynamically.
'DRV_SPI_CLIENT_SPECIFIC_CONTROL' must be defined in 'system_config.h'. This function is only useful for instance which
has got multiple slaves.
Preconditions
The DRV_SPI_Initialize routine must have been called.
DRV_SPI_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open instance handle, returned from the driver's open routine
clientSetup Communication parameters identified by DRV_SPI_CLIENT_SETUP
Returns
None
Remarks
This is an optional call. It is necessary only two clients using needs different configurations.
Example
DRV_HANDLE handle; // Returned from DRV_SPI_Open
DRV_SPI_CLIENT_SETUP clientSetup;
// Populate the communication setup configuration structure
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clientSetup.baudRate = 5000;
clientSetup.inputSamplePhase = SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE;
clientSetup.clockMode = DRV_SPI_CLOCK_MODE_IDLE_LOW_EDGE_RISE;
clientSetup.callback = &callBackFunction; // callback registered
DRV_SPI_ClientSetup ( handle, &clientSetup );
5.1.9.7.2.3 DRV_SPI_Close Function
C
void DRV_SPI_Close(
DRV_HANDLE handle
);
Description
This function closes an opened instance of the SPI driver, invalidating the handle.
Preconditions
The DRV_SPI_Initialize routine must have been called for the specified SPI driver instance.
DRV_SPI_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
None
Remarks
After calling this routine, the handle passed in "handle" must not be used with any of the remaining driver routines. A new handle
must be obtained by calling DRV_USART_Open before the caller may use the driver again. This function is thread safe in a
RTOS application.
Usually there is no need for the driver client to verify that the Close operation has completed.
Example
DRV_HANDLE handle; // Returned from DRV_SPI_Open
DRV_SPI_Close ( handle );
5.1.9.7.2.4 DRV_SPI_Open Function
C
DRV_HANDLE DRV_SPI_Open(
const SYS_MODULE_INDEX drvIndex,
const DRV_IO_INTENT intent
);
Description
This routine opens the specified USART driver instance and provides a handle that must be provided to all other client-level
operations to identify the caller and the instance of the driver. The ioIntent parameter defines how the client interacts with this
driver instance.
The DRV_IO_INTENT_BLOCKING and DRV_IO_INTENT_NONBLOCKING ioIntent options additionally affect the behavior of
the DRV_USART_Read() and DRV_USART_Write() functions. If the ioIntent is DRV_IO_INTENT_NONBLOCKING, then these
function will not block even if the required amount of data could not be processed. If the ioIntent is
DRV_IO_INTENT_BLOCKING, these functions will block till the required amount of data is processed.
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If ioIntent is DRV_IO_INTENT_READ, the client will only be read from the driver. If ioIntent is DRV_IO_INTENT_WRITE, the
client will only be able to write to the driver. If the ioIntent in DRV_IO_INTENT_READWRITE, the client will be able to do both,
read and write.
Specifying a DRV_IO_INTENT_EXCLUSIVE will cause the driver to provide exclusive access to this client. The driver cannot be
opened by any other client.
Preconditions
The DRV_SPI_Initialize function must have been called before calling this function.
Parameters
Parameters Description
drvIndex Identifier for the object instance to be opened
intent Zero or more of the values from the enumeration DRV_IO_INTENT ORed together
to indicate the intended use of the driver
Returns
If successful, the routine returns a valid open-instance handle (a number identifying both the caller and the module instance).
If an error occurs, the return value is DRV_HANDLE_INVALID. Error can occur
• if the number of client objects allocated via DRV_USART_CLIENTS_NUMBER is
insufficient.
• if the client is trying to open the driver but driver has been opened
exclusively by another client.
• if the driver hardware instance being opened is not initialized or is
invalid.
Remarks
The handle returned is valid until the DRV_USART_Close routine is called. This routine will NEVER block waiting for hardware.If
the requested intent flags are not supported, the routine will return DRV_HANDLE_INVALID. This function is thread safe in a
RTOS application. It should not be called in an ISR.
Example
DRV_HANDLE handle;
handle = DRV_SPI_Open( DRV_SPI_INDEX_0, DRV_IO_INTENT_EXCLUSIVE );
if( DRV_HANDLE_INVALID == handle )
{
// Unable to open the driver
}
5.1.9.7.3 Miscellaneous Functions
5.1.9.7.3.1 DRV_SPI_BufferAddRead Function
C
DRV_SPI_BUFFER_HANDLE DRV_SPI_BufferAddRead(
DRV_HANDLE handle,
void * rxBuffer,
size_t size
);
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Description
Registers a buffer for a read operation. Actual transfer will happen in the Task function. The status of this operation can be
monitored using DRV_SPI_BufferStatus function.
Preconditions
The DRV_SPI_Initialize routine must have been called for the specified SPI driver instance.
DRV_SPI_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_WRITE or DRV_IO_INTENT_READWRITE must have been specified in the DRV_SPI_Open call.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
rxBuffer The buffer to which the data should be written to.
size Number of bytes to be read.
Returns
None.
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_SPI_Open function and the driver was built to support
blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_SPI_Open function or the driver was built to only
support non-blocking behavior the call will return immediately. If the driver was not able to accept the data, an overrun error
status will be captured. To ensure that the driver is ready to accept data, the caller must first check the return value to
DRV_SPI_BufferStatus, as shown in the example.
Example
DRV_HANDLE handle; // Returned from DRV_SPI_Open
SPI_DATA_TYPE myBuffer[MY_BUFFER_SIZE];
// PUT API returns data in any case, upto the user to use it
DRV_SPI_BufferAddRead( handle, myBuffer, 10 );
if( DRV_SPI_BUFFER_STATUS_SUCCESS & DRV_SPI_BufferStatus( handle ) )
{
// All transmitter data has been sent.
}
5.1.9.7.3.2 DRV_SPI_BufferAddWrite Function
C
DRV_SPI_BUFFER_HANDLE DRV_SPI_BufferAddWrite(
DRV_HANDLE handle,
void * txBuffer,
size_t size
);
Description
Registers a buffer for a read operation. Actual transfer will happen in the Task function. The status of this operation can be
monitored using DRV_SPI_BufferStatus function.
Preconditions
The DRV_SPI_Initialize routine must have been called for the specified SPI driver instance.
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DRV_SPI_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_WRITE or DRV_IO_INTENT_READWRITE must have been specified in the DRV_SPI_Open call.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
rxBuffer The buffer to which the data should be written to.
size Number of bytes to be read.
Returns
None.
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_SPI_Open function and the driver was built to support
blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_SPI_Open function or the driver was built to only
support non-blocking behavior the call will return immediately. If the driver was not able to accept the data, an overrun error
status will be captured. To ensure that the driver is ready to accept data, the caller must first check the return value to
DRV_SPI_BufferStatus, as shown in the example.
Example
DRV_HANDLE handle; // Returned from DRV_SPI_Open
SPI_DATA_TYPE myBuffer[MY_BUFFER_SIZE];
unsigned int numBytes;
// Pre-initialize myBuffer with MY_BUFFER_SIZE bytes of valid data.
numBytes = 0;
// PUT API returns data in any case, upto the user to use it
DRV_SPI_BufferAddRead( handle, myBuffer, 10 );
if( DRV_SPI_BUFFER_STATUS_SUCCESS & DRV_SPI_BufferStatus( handle ) )
{
// All transmitter data has been sent.
}
5.1.9.7.3.3 DRV_SPI_BufferAddWriteRead Function
C
DRV_SPI_BUFFER_HANDLE DRV_SPI_BufferAddWriteRead(
DRV_HANDLE handle,
void * txBuffer,
void * rxBuffer,
size_t size
);
Description
Registers a buffer for a read operation. Actual transfer will happen in the Task function. The status of this operation can be
monitored using DRV_SPI_BufferStatus function.
Preconditions
The DRV_SPI_Initialize routine must have been called for the specified SPI driver instance.
DRV_SPI_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_WRITE or DRV_IO_INTENT_READWRITE must have been specified in the DRV_SPI_Open call.
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Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
rxBuffer The buffer to which the data should be written to.
size Number of bytes to be read.
Returns
None.
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_SPI_Open function and the driver was built to support
blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_SPI_Open function or the driver was built to only
support non-blocking behavior the call will return immediately. If the driver was not able to accept the data, an overrun error
status will be captured. To ensure that the driver is ready to accept data, the caller must first check the return value to
DRV_SPI_BufferStatus, as shown in the example.
Example
DRV_HANDLE handle; // Returned from DRV_SPI_Open
SPI_DATA_TYPE myBuffer[MY_BUFFER_SIZE];
unsigned int numBytes;
// Pre-initialize myBuffer with MY_BUFFER_SIZE bytes of valid data.
numBytes = 0;
// PUT API returns data in any case, upto the user to use it
DRV_SPI_BufferAddWriteRead( handle, myTxBuffer, myRxBuffer, 10 );
if( DRV_SPI_BUFFER_STATUS_SUCCESS & DRV_SPI_BufferStatus( handle ) )
{
// All transmitter data has been sent.
}
5.1.9.7.3.4 DRV_SPI_VersionGet Function
C
unsigned int DRV_SPI_VersionGet(
const SYS_MODULE_INDEX drvIndex
);
Description
This function gets the SPI driver version. The version is encoded as major * 10000 + minor * 100 + patch. The stringed version
can be obtained using DRV_SPI_VersionStrGet.
Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the object instance to get the version for
Returns
Current driver version in numerical format.
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Remarks
None.
Example
unsigned int version;
version = DRV_SPI_VersionGet( DRV_SPI_INDEX_0 );
if(version < 110200)
{
// Do Something
}
5.1.9.7.3.5 DRV_SPI_VersionStrGet Function
C
char * DRV_SPI_VersionStrGet(
const SYS_MODULE_INDEX drvIndex
);
Description
This function gets the SPI driver version. The version is returned as major.minor.path[type], where type is optional. The
numerical version can be obtained using DRV_SPI_VersionGet.
Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the object instance to get the version for
Returns
Current the SPI driver version in the string format.
Remarks
None.
Example
char *version;
version = DRV_SPI_VersionStrGet( DRV_SPI_INDEX_0 );
printf("%s", version);
5.1.9.7.3.6 DRV_SPI_INDEX_1 Macro
C
#define DRV_SPI_INDEX_1 1
Description
This is macro DRV_SPI_INDEX_1.
5.1.9.7.3.7 DRV_SPI_INDEX_2 Macro
C
#define DRV_SPI_INDEX_2 2
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Description
This is macro DRV_SPI_INDEX_2.
5.1.9.7.3.8 DRV_SPI_INDEX_3 Macro
C
#define DRV_SPI_INDEX_3 3
Description
This is macro DRV_SPI_INDEX_3.
5.1.9.7.3.9 DRV_SPI_INDEX_4 Macro
C
#define DRV_SPI_INDEX_4 4
Description
This is macro DRV_SPI_INDEX_4.
5.1.9.7.3.10 DRV_SPI_INDEX_5 Macro
C
#define DRV_SPI_INDEX_5 5
Description
This is macro DRV_SPI_INDEX_5.
5.1.9.7.3.11 DRV_SPI_RX_FIFO_INTERRUPT_MODE Macro
C
#define DRV_SPI_RX_FIFO_INTERRUPT_MODE SPI_FIFO_INTERRUPT_WHEN_RECEIVE_BUFFER_IS_FULL
Description
This is macro DRV_SPI_RX_FIFO_INTERRUPT_MODE.
5.1.9.7.3.12 DRV_SPI_TX_FIFO_INTERRUPT_MODE Macro
C
#define DRV_SPI_TX_FIFO_INTERRUPT_MODE SPI_FIFO_INTERRUPT_WHEN_TRANSMISSION_IS_COMPLETE
Description
This is macro DRV_SPI_TX_FIFO_INTERRUPT_MODE.
5.1.9.7.4 Data Types and Constants
5.1.9.7.4.1 DRV_SPI_BAUD_RATE Macro
C
#define DRV_SPI_BAUD_RATE 8000000
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Description
SPI baud rate value configuration
This macro controls the baud rate value of the SPI driver.
Remarks
None.
5.1.9.7.4.2 DRV_SPI_BAUD_RATE_CLOCK Macro
C
#define DRV_SPI_BAUD_RATE_CLOCK SPI_BAUD_RATE_CLOCK_MCLK
Description
SPI baud rate clock selection
This macro selects the SPI baud rate clock.
Remarks
None.
5.1.9.7.4.3 DRV_SPI_BUFFER_HANDLE_INVALID Macro
C
#define DRV_SPI_BUFFER_HANDLE_INVALID ((DRV_SPI_BUFFER_HANDLE)(-1))
Description
SPI Driver Invalid Buffer Handle
This is the definition of an invalid buffer handle. An invalid buffer handle is returned by DRV_SPI_BufferAddRead() and
DRV_SPI_BufferAddWrite() function if the buffer add request was not successful.
Remarks
None
5.1.9.7.4.4 DRV_SPI_BUFFER_SIZE Macro
C
#define DRV_SPI_BUFFER_SIZE 8
Description
This is macro DRV_SPI_BUFFER_SIZE.
5.1.9.7.4.5 DRV_SPI_BUFFER_USAGE_TYPE Macro
C
#define DRV_SPI_BUFFER_USAGE_TYPE DRV_SPI_BUFFER_TYPE_STANDARD
Description
SPI buffer type configuration
This macro controls the buffer type of the SPI driver.
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Remarks
None.
5.1.9.7.4.6 DRV_SPI_CLIENTS_NUMBER Macro
C
#define DRV_SPI_CLIENTS_NUMBER 1
Description
SPI maximum number of clients
This definition selects the maximum number of clients that the SPI driver can support at run time.
Remarks
None.
5.1.9.7.4.7 DRV_SPI_CLOCK_OPERATION_MODE Macro
C
#define DRV_SPI_CLOCK_OPERATION_MODE DRV_SPI_CLOCK_MODE_IDLE_LOW_EDGE_RISE
Description
SPI clock mode configuration
This macro controls the clock mode of the SPI driver.
Remarks
None.
5.1.9.7.4.8 DRV_SPI_COMMUNICATION_WIDTH Macro
C
#define DRV_SPI_COMMUNICATION_WIDTH SPI_COMMUNICATION_8BIT_WIDE
Description
SPI communication width configuration
This macro controls the communication width of the SPI driver.
Remarks
None.
5.1.9.7.4.9 DRV_SPI_FRAME_SYNC_PULSE_COUNT Macro
C
#define DRV_SPI_FRAME_SYNC_PULSE_COUNT SPI_FRAME_SYNC_PULSE_16_CHAR
Description
SPI frame sync pulse count selection
This macro selects the SPI frame sync pulse count.
Remarks
None.
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5.1.9.7.4.10 DRV_SPI_FRAME_SYNC_PULSE_DIRECTION Macro
C
#define DRV_SPI_FRAME_SYNC_PULSE_DIRECTION SPI_FRAME_PULSE_DIRECTION_INPUT
Description
SPI frame sync pulse direction selection
This macro selects the SPI frame sync pulse direction.
Remarks
None.
5.1.9.7.4.11 DRV_SPI_FRAME_SYNC_PULSE_EDGE Macro
C
#define DRV_SPI_FRAME_SYNC_PULSE_EDGE SPI_FRAME_PULSE_EDGE_PRECEDES_FIRST_CLOCK
Description
SPI frame sync pulse edge selection
This macro selects the SPI frame sync pulse edge.
Remarks
None.
5.1.9.7.4.12 DRV_SPI_FRAME_SYNC_PULSE_POLARITY Macro
C
#define DRV_SPI_FRAME_SYNC_PULSE_POLARITY SPI_FRAME_PULSE_POLARITY_ACTIVE_HIGH
Description
SPI frame sync pulse polarity selection
This macro selects the SPI frame sync pulse polarity.
Remarks
None.
5.1.9.7.4.13 DRV_SPI_FRAME_SYNC_PULSE_WIDTH Macro
C
#define DRV_SPI_FRAME_SYNC_PULSE_WIDTH SPI_FRAME_PULSE_WIDTH_TO_ONE_WORD
Description
SPI frame sync pulse width selection
This macro selects the SPI frame sync pulse width.
Remarks
None.
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5.1.9.7.4.14 DRV_SPI_INDEX Macro
C
#define DRV_SPI_INDEX DRV_SPI_INDEX_2
Description
SPI static index selection
This definition selects the SPI static index for the driver object reference.
Remarks
This index is required to make a reference to the driver object.
5.1.9.7.4.15 DRV_SPI_INDEX_0 Macro
C
#define DRV_SPI_INDEX_0 0
Description
SPI Driver Module Index Numbers
These constants provide the SPI driver index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals.
These values should be passed into the DRV_SPI_Initialize and DRV_SPI_Open functions to identify the driver instance in use.
5.1.9.7.4.16 DRV_SPI_INDEX_COUNT Macro
C
#define DRV_SPI_INDEX_COUNT SPI_NUMBER_OF_MODULES
Description
SPI Driver Module Index Count
This constant identifies the number of valid SPI driver indices.
Remarks
This constant should be used in place of hard-coded numeric literals.
This value is derived from device-specific header files defined as part of the peripheral libraries.
5.1.9.7.4.17 DRV_SPI_INPUT_SAMPLE_PHASE Macro
C
#define DRV_SPI_INPUT_SAMPLE_PHASE SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE
Description
SPI input sample phase selection
This macro selects the SPI input sample phase.
Remarks
None.
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5.1.9.7.4.18 DRV_SPI_INSTANCES_NUMBER Macro
C
#define DRV_SPI_INSTANCES_NUMBER 1
Description
SPI hardware instance configuration
This definition selects the maximum number of hardware instances that can be supported by the dynamic driver.
Remarks
None.
5.1.9.7.4.19 DRV_SPI_INTERRUPT_MODE Macro
C
#define DRV_SPI_INTERRUPT_MODE false
Description
SPI interrupt and polled mode operation control
This macro controls the operation of the driver in the interrupt mode of operation. The possible values of this macro are:
• true - Select if interrupt mode of SPI operation is desired
• false - Select if polling mode of SPI operation is desired
Not defining this option to true or false will result in build error.
Remarks
None.
5.1.9.7.4.20 DRV_SPI_INTERRUPT_SOURCE_ERROR Macro
C
#define DRV_SPI_INTERRUPT_SOURCE_ERROR INT_SOURCE_SPI_1_ERROR
Description
SPI error interrupt source
Macro to define the error interrupt source in case of static driver.
Remarks
Refer to the INT PLIB document for more information on INT_SOURCE enumeration
5.1.9.7.4.21 DRV_SPI_INTERRUPT_SOURCE_RX Macro
C
#define DRV_SPI_INTERRUPT_SOURCE_RX INT_SOURCE_SPI_1_EVENT
Description
SPI receive interrupt source
This macro defines the receive interrupt source of the static driver.
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Remarks
Refer to the Interrupt Peripheral Library documentation for more information on INT_SOURCE enumeration.
This should be specified in case the device does not have a dedicated receive interrupt source.
5.1.9.7.4.22 DRV_SPI_INTERRUPT_SOURCE_TX Macro
C
#define DRV_SPI_INTERRUPT_SOURCE_TX INT_SOURCE_SPI_1_EVENT
Description
SPI transmit/receive or transmit alone interrupt source
This macro defines the transmit/receive or transmit alone interrupt source of the static driver.
Remarks
Refer to the Interrupt Peripheral Library documentation for more information on the INT_SOURCE enumeration.
Some devices have a single interrupt source for both transmit and receive communication, while some have a dedicated transmit
interrupt source. These are handled through the DRV_SPI_INTERRUPT_SOURCE configuration switch.
5.1.9.7.4.23 DRV_SPI_PERIPHERAL_ID Macro
C
#define DRV_SPI_PERIPHERAL_ID SPI_ID_1
Description
SPI peripheral ID selection
This macro selects the SPI peripheral ID selection. This is an intialization override of the spiID member of the intialization
configuration.
Remarks
Some devices also support SPI_ID_0.
5.1.9.7.4.24 DRV_SPI_PORTS_REMAP_USAGE Macro
C
#define DRV_SPI_PORTS_REMAP_USAGE false
Description
SPI pins remap selection
This macro selects the SPI pins remap. The possible values of this macro are:
• true - Remap is required
• false - Remap is not required
Remarks
None.
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5.1.9.7.4.25 DRV_SPI_POWER_STATE Macro
C
#define DRV_SPI_POWER_STATE SYS_MODULE_POWER_IDLE_STOP
Description
SPI power state configuration
This macro controls the power state of the SPI driver.
Remarks
This feature may not be available in the device or the SPI module selected.
5.1.9.7.4.26 DRV_SPI_PROTOCOL Macro
C
#define DRV_SPI_PROTOCOL DRV_SPI_PROTOCOL_TYPE_STANDARD
Description
SPI protocol type configuration
This macro controls the protocol type of the SPI driver.
Remarks
None.
5.1.9.7.4.27 DRV_SPI_USAGE_MODE Macro
C
#define DRV_SPI_USAGE_MODE DRV_SPI_MODE_MASTER
Description
SPI usage mode configuration
This macro controls the usage mode of the SPI driver.
Remarks
None.
5.1.9.7.4.28 DRV_SPI_BUFFER_EVENT Enumeration
C
typedef enum {
DRV_SPI_BUFFER_EVENT_PENDING,
DRV_SPI_BUFFER_EVENT_COMPLETE,
DRV_SPI_BUFFER_EVENT_ERROR
} DRV_SPI_BUFFER_EVENT;
Description
SPI Driver Buffer Events
This enumeration identifies the possible events that can result from a buffer add request caused by the client calling either the
DRV_NVM_BufferAddRead or DRV_NVM_BufferAddWrite functions.
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Members
Members Description
DRV_SPI_BUFFER_EVENT_PENDING Buffer is pending to get processed
DRV_SPI_BUFFER_EVENT_COMPLETE All data from or to the buffer was transferred successfully.
DRV_SPI_BUFFER_EVENT_ERROR There was an error while processing the buffer transfer request.
Remarks
One of these values is passed in the "event" parameter of the event handling callback function that the client registered with the
driver by calling the DRV_NVM_BufferEventHandlerSet function when a buffer transfer request is completed.
5.1.9.7.4.29 DRV_SPI_BUFFER_EVENT_HANDLER Type
C
typedef void (* DRV_SPI_BUFFER_EVENT_HANDLER)(DRV_SPI_BUFFER_EVENT event,
DRV_SPI_BUFFER_HANDLE bufferHandle, uintptr_t context);
Description
SPI Driver Buffer Event Handler Function Pointer
This data type defines the required function signature for the SPI driver buffer event handling callback function. A client must
register a pointer to a buffer event handling function who's function signature (parameter and return value types) match the types
specified by this function pointer in order to receive buffer related event calls back from the driver.
The parameters and return values and return value are described here and a partial example implementation is provided.
Parameters
Parameters Description
event Identifies the type of event
bufferHandle Handle identifying the buffer to which the vent relates
context Value identifying the context of the application that registered the event handling
function.
Returns
None.
Remarks
If the event is DRV_SPI_BUFFER_EVENT_COMPLETE, it means that the data was transferred successfully.
If the event is DRV_SPI_BUFFER_EVENT_ERROR, it means that the data was not transferred successfully.
The bufferHandle parameter contains the buffer handle of the buffer that failed.
The context parameter contains the a handle to the client context, provided at the time the event handling function was
registered using the DRV_SPI_BufferEventHandlerSet function. This context handle value is passed back to the client as the
"context" parameter. It can be any value necessary to identify the client context or instance (such as a pointer to the client's data)
instance of the client that made the buffer add request.
The event handler function executes in an interrupt context when the driver is configured for interrupt mode operation. It is
recommended of the application to not perform process intensive operations with in this function.
Example
void APP_MyBufferEventHandler( DRV_SPI_BUFFER_EVENT event,
DRV_SPI_BUFFER_HANDLE bufferHandle,
uintptr_t context )
{
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MY_APP_DATA_STRUCT pAppData = (MY_APP_DATA_STRUCT) context;
switch(event)
{
case DRV_SPI_BUFFER_EVENT_COMPLETE:
// Handle the completed buffer.
break;
case DRV_SPI_BUFFER_EVENT_ERROR:
default:
// Handle error.
break;
}
}
5.1.9.7.4.30 DRV_SPI_BUFFER_HANDLE Type
C
typedef uintptr_t DRV_SPI_BUFFER_HANDLE;
Description
SPI Driver Buffer Handle
A buffer handle value is returned by a call to the DRV_SPI_BufferAddRead()/ DRV_SPI_BufferAddWriteor
DRV_SPI_BufferAddReadWrite() functions. This handle is associated with the buffer passed into the function and it allows the
application to track the completion of the data from (or into) that buffer. The buffer handle value returned from the "buffer add"
function is returned back to the client by the "callback" function registered with the driver.
The buffer handle assigned to a client request expires when the client has been notified of the completion of the buffer transfer
(after event handler function that notifies the client returns) or after the buffer has been retired by the driver if no event handler
callback was set.
Remarks
None
5.1.9.7.4.31 DRV_SPI_BUFFER_TYPE Enumeration
C
typedef enum {
DRV_SPI_BUFFER_TYPE_STANDARD,
DRV_SPI_BUFFER_TYPE_ENHANCED
} DRV_SPI_BUFFER_TYPE;
Description
SPI Buffer Type Selection
This enumeration identifies the various buffer types of the SPI module.
Members
Members Description
DRV_SPI_BUFFER_TYPE_STANDARD SPI Buffer Type Standard
DRV_SPI_BUFFER_TYPE_ENHANCED SPI Enhanced Buffer Type
Remarks
None.
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5.1.9.7.4.32 DRV_SPI_CLIENT_SETUP Type
C
typedef struct _DRV_SPI_CLIENT_SETUP DRV_SPI_CLIENT_SETUP;
Description
SPI Client Initialization Data
This structure lists the elements needed to set up an SPI client. Used by the function DRV_SPI_ClientSetup function. This data
type defines the data required to initialize an SPI client.
Remarks
None.
5.1.9.7.4.33 DRV_SPI_CLOCK_MODE Enumeration
C
typedef enum {
DRV_SPI_CLOCK_MODE_IDLE_LOW_EDGE_RISE,
DRV_SPI_CLOCK_MODE_IDLE_LOW_EDGE_FALL,
DRV_SPI_CLOCK_MODE_IDLE_HIGH_EDGE_FALL,
DRV_SPI_CLOCK_MODE_IDLE_HIGH_EDGE_RISE
} DRV_SPI_CLOCK_MODE;
Description
SPI Clock Mode Selection
This enumeration identifies the various clock modes of the SPI module.
Members
Members Description
DRV_SPI_CLOCK_MODE_IDLE_LOW_EDGE_RISE SPI Clock Mode 0 - Idle State Low & Sampling on Rising Edge
DRV_SPI_CLOCK_MODE_IDLE_LOW_EDGE_FALL SPI Clock Mode 1 - Idle State Low & Sampling on Falling Edge
DRV_SPI_CLOCK_MODE_IDLE_HIGH_EDGE_FALL SPI Clock Mode 2 - Idle State High & Sampling on Falling Edge
DRV_SPI_CLOCK_MODE_IDLE_HIGH_EDGE_RISE SPI Clock Mode 3 - Idle State High & Sampling on Rising Edge
Remarks
None.
5.1.9.7.4.34 DRV_SPI_INIT Type
C
typedef struct _DRV_SPI_INIT DRV_SPI_INIT;
Description
SPI Driver Initialization Data
This data type defines the data required to initialize or reinitialize the SPI driver. If the driver is built statically, the members of this
data structure are statically over-ridden by static override definitions in the system_config.h file.
Remarks
None.
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5.1.9.7.4.35 DRV_SPI_MODE Enumeration
C
typedef enum {
DRV_SPI_MODE_MASTER,
DRV_SPI_MODE_SLAVE
} DRV_SPI_MODE;
Description
SPI Usage Modes Enumeration
This enumeration identifies the various usage modes of the SPI module.
Members
Members Description
DRV_SPI_MODE_MASTER SPI Mode Master
DRV_SPI_MODE_SLAVE SPI Mode Slave
Remarks
None.
5.1.9.7.4.36 DRV_SPI_PROTOCOL_TYPE Enumeration
C
typedef enum {
DRV_SPI_PROTOCOL_TYPE_STANDARD,
DRV_SPI_PROTOCOL_TYPE_FRAMED,
DRV_SPI_PROTOCOL_TYPE_AUDIO
} DRV_SPI_PROTOCOL_TYPE;
Description
SPI Protocols Enumeration
This enumeration identifies the various protocols of the SPI module.
Members
Members Description
DRV_SPI_PROTOCOL_TYPE_STANDARD SPI Protocol Type Standard
DRV_SPI_PROTOCOL_TYPE_FRAMED SPI Protocol Type Framed
DRV_SPI_PROTOCOL_TYPE_AUDIO SPi Protocol Type Audio
Remarks
None.
5.1.9.8 Files
Files
Name Description
drv_spi.h SPI device driver interface file.
drv_spi_config_template.h SPI Driver configuration definitions template.
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Description
5.1.9.8.1 drv_spi.h
SPI Driver Interface
The SPI driver provides a simple interface to manage the SPI module. This file defines the interface definitions and prototypes
for the SPI driver.
Enumerations
Name Description
DRV_SPI_BUFFER_EVENT Identifies the possible events that can result from a buffer add request.
DRV_SPI_BUFFER_TYPE Identifies the various buffer types of the SPI module.
DRV_SPI_CLOCK_MODE Identifies the various clock modes of the SPI module.
DRV_SPI_MODE Identifies the various usage modes of the SPI module.
DRV_SPI_PROTOCOL_TYPE Identifies the various protocols of the SPI module.
Functions
Name Description
DRV_SPI_BufferAddRead Registers a buffer for a read operation. Actual transfer will happen in the Task
function.
DRV_SPI_BufferAddWrite Registers a buffer for a read operation. Actual transfer will happen in the Task
function.
DRV_SPI_BufferAddWriteRead Registers a buffer for a read operation. Actual transfer will happen in the Task
function.
DRV_SPI_BufferStatus Returns the transmitter and receiver transfer status.
DRV_SPI_ClientSetup Initializes a client.
DRV_SPI_Close Closes an opened instance of the SPI driver
DRV_SPI_Deinitialize De-initializes the specified instance of the SPI driver module.
DRV_SPI_Initialize Initializes the SPI driver.
DRV_SPI_Open Opens the specified SPI driver instance and returns a handle to it.
DRV_SPI_Read Gets/Reads byte(s) from SPI. The function will wait until the specified number of
bytes is received.
DRV_SPI_Status Provides the current status of the SPI driver module.
DRV_SPI_Tasks Maintains the driver's state machine and implements its ISR.
DRV_SPI_VersionGet Gets the SPI driver version in numerical format.
DRV_SPI_VersionStrGet Gets the SPI driver version in string format.
DRV_SPI_Write Writes the data to SPI. The function will wait until all the bytes are transmitted.
Macros
Name Description
DRV_SPI_BUFFER_HANDLE_INVALID Definition of an invalid buffer handle.
DRV_SPI_INDEX_0 SPI driver index definitions.
DRV_SPI_INDEX_1 This is macro DRV_SPI_INDEX_1.
DRV_SPI_INDEX_2 This is macro DRV_SPI_INDEX_2.
DRV_SPI_INDEX_3 This is macro DRV_SPI_INDEX_3.
DRV_SPI_INDEX_4 This is macro DRV_SPI_INDEX_4.
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DRV_SPI_INDEX_5 This is macro DRV_SPI_INDEX_5.
DRV_SPI_INDEX_COUNT Number of valid SPI driver indices.
Types
Name Description
DRV_SPI_BUFFER_EVENT_HANDLER Pointer to a SPI Driver Buffer Event handler function
DRV_SPI_BUFFER_HANDLE Handle identifying a read or write buffer passed to the driver.
DRV_SPI_CLIENT_SETUP Defines the data required to initialize an SPI client.
DRV_SPI_INIT Defines the data required to initialize or reinitialize the SPI driver
File Name
drv_spi.h
Company
Microchip Technology Inc.
5.1.9.8.2 drv_spi_config_template.h
SPI Driver Configuration Definitions for the Template Version
These definitions statically define the driver's mode of operation.
Macros
Name Description
DRV_SPI_BAUD_RATE Controls the baud rate value of the SPI driver.
DRV_SPI_BAUD_RATE_CLOCK Selects the SPI baud rate clock.
DRV_SPI_BUFFER_SIZE This is macro DRV_SPI_BUFFER_SIZE.
DRV_SPI_BUFFER_USAGE_TYPE Controls the buffer type of the SPI driver.
DRV_SPI_CLIENTS_NUMBER Selects the miximum number of clients.
DRV_SPI_CLOCK_OPERATION_MODE Controls the clock mode of the SPI driver.
DRV_SPI_COMMUNICATION_WIDTH Controls the communication width of the SPI driver.
DRV_SPI_FRAME_SYNC_PULSE_COUNT Selects the SPI frame sync pulse count.
DRV_SPI_FRAME_SYNC_PULSE_DIRECTION Selects the SPI frame sync pulse direction.
DRV_SPI_FRAME_SYNC_PULSE_EDGE Selects the SPI frame sync pulse edge.
DRV_SPI_FRAME_SYNC_PULSE_POLARITY Selects the SPI frame sync pulse polarity.
DRV_SPI_FRAME_SYNC_PULSE_WIDTH Selects the SPI frame sync pulse width.
DRV_SPI_INDEX SPI static index selection.
DRV_SPI_INPUT_SAMPLE_PHASE Selects the SPI input sample phase.
DRV_SPI_INSTANCES_NUMBER Selects the maximum number of hardware instances that can be
supported by the dynamic driver .
DRV_SPI_INTERRUPT_MODE Controls operation of the driver in the interrupt or polled mode.
DRV_SPI_INTERRUPT_SOURCE_ERROR Defines the error interrupt source in case of static driver
DRV_SPI_INTERRUPT_SOURCE_RX Defines the receive interrupt source in case of static driver.
DRV_SPI_INTERRUPT_SOURCE_TX Defines the transmit/receive or transmit alone interrupt source in
case of static driver.
DRV_SPI_PERIPHERAL_ID SPI peripheral ID selection.
DRV_SPI_PORTS_REMAP_USAGE Selects the SPI pins remap.
DRV_SPI_POWER_STATE Controls the power state of the SPI driver.
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DRV_SPI_PROTOCOL Controls the protocol type of the SPI driver.
DRV_SPI_RX_FIFO_INTERRUPT_MODE This is macro DRV_SPI_RX_FIFO_INTERRUPT_MODE.
DRV_SPI_TX_FIFO_INTERRUPT_MODE This is macro DRV_SPI_TX_FIFO_INTERRUPT_MODE.
DRV_SPI_USAGE_MODE Controls the usage mode of the SPI driver.
File Name
drv_spi_config_template.h
Company
Microchip Technology Inc.
5.1.10 Timer Driver Library
5.1.10.1 Introduction
Timer Driver Library
for
Microchip Microcontrollers
This library provides an interface to manage the Timer module on the Microchip family of microcontrollers during different modes
of operation.
Description
Overview
Timers are useful for generating accurate time based periodic interrupts for software application or real time operating systems.
Other uses include counting external pulses or accurate timing measurement of external events using the timer's gate functions
and accurate hardware delays.
Please refer to the the Data Sheet for the part that is being used.
Note: Trademarks and Intellectual Property are property of their respective owners. Customers are responsible for obtaining
appropriate licensing or rights before using this software.
5.1.10.2 Release Notes
MPLAB Harmony Version: v0.70b Timer Driver Library Version : 0.02 Alpha Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
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5.1.10.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.10.4 Using the Library
This topic describes the basic architecture of the Timer Driver Library and provides information and examples on how to use it.
Interface Header File: drv_tmr.h
The interface to the Timer Driver Library is defined in the "drv_tmr.h" header file.
Please refer to the MPLAB Harmony Overview for how the driver interacts with the framework.
5.1.10.4.1 Abstraction Model
Microchip devices have two type of timers:
• Period-Match - When the counting timer matches the configured period, this timer is said to complete one iteration and an
interrupt is set
• Overflow - When the counting timer overflows/rolls over, interrupt is set and restarts from its previously set counter value. In
this case, the preset period value would be the maximum possible count value.
The Timer Driver abstracts this difference and provides a unified model for both of these types of timers.
Description
Abstraction Model
The abstraction model of the Timer Driver is explained in the following diagram:
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The core functionality of the Timer allows access to both the counter and the period values.
The unified model allows user not to worry about whether the Timer currently being used is a overflow or period match-based.
The user simply updates the period and the driver automatically takes care of adjusting the respective Timer's periodicity. In case
a user needs any modification into the counter's initial value (i.e., to adjust for any errors in periodicity), they are allowed to do so
using the counter control interfaces.
5.1.10.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The table below lists the interface section and its brief description.
Library Interface Section Description
Configuration Provides macros for configuring the system. It is required that the system configures
the driver to build correctly by choosing appropriate configuration options as listed in
this section. These macros enable different features or modes of the timer peripheral.
System Interaction Functions Provides interfaces to system layer to initialize, deinitialize and reinitialize the
module. This section also describes functions to query the status of the module.
Core Functions Provides interfaces for core functionality of the driver.
Alarm Functions Provides interfaces to handle alarm features, if alarm functionality is enabled.
Period Functions Provides interfaces to control the periodicity of the timers.
Counter Control Functions Provides interfaces to update the counter values.
Miscellaneous Functions Provides interfaces to get the version information, timer tick and operating
frequencies.
5.1.10.4.3 How the Library Works
The library provides interfaces to support:
• System Interaction
• Sync Mode Setup
• Period Modification
• Counter Modification
• Client Core Functionality
• Client Alarm Functionality (optional function, enabled using configuration options)
• Other Optional Functionality (enabled using configuration options)
Note: Any code segment pertaining to the driver interfaces will work for both the static or dynamic configurations. It is not
necessary to modify the code to move from one configuration to the other (i.e., from static or dynamic or static-multi).
5.1.10.4.3.1 System Interaction
This section describes Timer initialization and reinitialization.
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Description
Initialization and Reinitialization
The system performs the initialization and the reinitialization of the device driver with settings that affect only the instance of the
device that is being initialized or re-initialized. During system initialization, each instance of the Timer module will be initialized
with the following configuration settings (either passed dynamically at run time using DRV_TMR_INIT or by using initialization
overrides) that are supported by the specific Timer module hardware:
Initialization
member
Configuration Name Description
moduleInit DRV_TMR_POWER_STATE System module initialization of the power state.
tmrId DRV_TMR_PERIPHERAL_ID Timer hardware module ID (peripheral library-level ID).
clockSource DRV_TMR_CLOCK_SOURCE Clock Source Selection, Enables either the internal or the external
clock, using one of the possible values from
TMR_CLOCK_SOURCE.
timerPeriod DRV_TMR_TIMER_PERIOD Timer period value.
prescale DRV_TMR_PRESCALE Sets up the prescaler, using one of the possible values from
TMR_PRESCALE.
sourceEdge DRV_TMR_SOURCE_EDGE Source edge selection, if supported by the hardware, selects either
the rising or falling edge, using one of the possible values from
TMR_CLOCK_SOURCE_EDGE.
postscale DRV_TMR_POSTSCALE Sets up the postscaler, if supported by the hardware, using one of
the possible values from TMR_POSTSCALE.
syncMode DRV_TMR_SYNCHRONIZATION_MODE Selects the operation mode of the instance using one of the
possible values from DRV_TMR_SYNC_MODE.
interruptSource DRV_TMR_INTERRUPT_SOURCE Interrupt source identifier for the Timer module being initialized,
which is available from the respective device's processor headers.
The DRV_TMR_Initialize function returns an object handle of the type SYS_MODULE_OBJ. After this, the object handle
returned by the Initialize interface would be used by the other system interfaces like DRV_TMR_Reinitialize,
DRV_TMR_Deinitialize, DRV_TMR_Status and DRV_TMR_Tasks.
Example: Timer Initialization Through DRV_TMR_INIT
DRV_TMR_INIT init;
SYS_MODULE_OBJ object;
SYS_STATUS tmrStatus;
// populate the TMR init configuration structure
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_2;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_TX_VALUE_256;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_2;
init.timerPeriod = 0xABCD;
object = DRV_TMR_Initialize (DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&init);
tmrStatus = DRV_TMR_Status(object);
if ( SYS_STATUS_READY != tmrStatus)
{
// Handle error
}
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Example: Timer initialization Through Configuration
Source file:
SYS_MODULE_OBJ object;
SYS_STATUS tmrStatus;
int main( void )
{
object = DRV_TMR_Initialize (DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)NULL);
tmrStatus = DRV_TMR_Status(object);
if ( SYS_STATUS_READY != tmrStatus)
{
// Handle error
}
}
Configuration file: sys_config.h
#define DRV_TMR_POWER_STATE SYS_MODULE_POWER_RUN_FULL
#define DRV_TMR_PERIPHERAL_ID TMR_ID_3 // TMR_MODULE_ID
#define DRV_TMR_CLOCK_SOURCE TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK
#define DRV_TMR_PRESCALE TMR_PRESCALE_TX_VALUE_256
#define DRV_TMR_SYNCHRONIZATION_MODE DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL
#define DRV_TMR_INTERRUPT_SOURCE INT_SOURCE_TIMER_3
#define DRV_TMR_TIMER_PERIOD 0x0000F424 // 200ms
Deinitialization
Once the Initialize operation has been called, the Deinitialize operation must be called before the iIitialize operation can be called
again.This routine may block if the driver is running in an OS environment that supports blocking operations and the driver
requires system resources access. However, the routine will never block for hardware Timer access. If the operation requires
time to allow the hardware to complete, this will be reported by the DRV_TMR_Status operation.
Status
Timer status is available to query the module state before, during, and after initialization, deinitialization, and reinitialization.
Tasks Routine
The interface DRV_TMR_Tasks can be called in two ways:
• By the system task service in a polled environment
• By the interrupt service routine of the timer in an interrupt based system
Example: Polling
int main( void )
{
SYS_MODULE_OBJ object;
object = DRV_TMR_Initialize( DRV_TMR_INDEX_0, (SYS_MODULE_INIT *) &initConf );
if( SYS_STATUS_READY != DRV_TMR_Status( object ) )
return 0;
while (1)
{
DRV_TMR_Tasks (object);
}
}
Example: Interrupt
int main( void )
{
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SYS_MODULE_OBJ object;
object = DRV_TMR_Initialize( DRV_TMR_INDEX_0, (SYS_MODULE_INIT *) &initConf );
if( SYS_STATUS_READY != DRV_TMR_Status( object ) )
return 0;
while (1);
}
/* Sample interrupt routine not specific to any device family */
void ISR T1Interrupt(void)
{
//Call the Timer Tasks routine
DRV_TMR_Tasks(object);
}
5.1.10.4.3.2 Client Interaction
This section describer general client operation.
Description
General Client Operation
For the application to begin using an instance of the Timer module, it must call the DRV_TMR_Open function. This provides the
configuration required to open the Timer instance for operation. If the driver is deinitialized using the function
DRV_TMR_Deinitialize, the application must call the DRV_TMR_Open function again to set up the instance of the Timer. The
function DRV_TMR_Open need not be called again if the system is reinitialized using the DRV_TMR_Reinitialize function.
The Timer Driver supports only the 'DRV_IO_INTENT_EXCLUSIVE' IO_INTENT.
Example:
DRV_HANDLE handle;
// Configure the instance DRV_TMR_INDEX_1 with the configuration
handle = DRV_TMR_Open(DRV_TMR_INDEX_1, DRV_IO_INTENT_EXCLUSIVE);
if( handle == DRV_HANDLE_INVALID )
{
// Client cannot open the instance.
}
The function DRV_TMR_Close closes an already opened instance of the Timer Driver, invalidating the handle. DRV_TMR_Open
must have been called to obtain a valid opened device handle.
Example:
DRV_HANDLE handle;
// Configure the instance DRV_TMR_INDEX_1 with the configuration
handle = DRV_TMR_Open(DRV_TMR_INDEX_1, DRV_IO_INTENT_EXCLUSIVE);
/*...*/
DRV_TMR_Close( handle );
The client has the option to check the status through the interface DRV_TMR_ClientStatus.
Example:
DRV_HANDLE handle;
// Configure the instance DRV_TMR_INDEX_1 with the configuration
handle = DRV_TMR_Open(DRV_TMR_INDEX_1, DRV_IO_INTENT_EXCLUSIVE);
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if ( DRV_TMR_CLIENT_STATUS_READY != DRV_TMR_ClientStatus( handle ) )
return 0;
5.1.10.4.3.3 Sync Mode Selection
This section describes the Sync mode selection process.
Description
Sync Mode Selection
The Timer Driver can operate in various modes as described below. They can be changed using DRV_TMR_SyncModeSet, and
the current mode being using by the Timer can be retrieved using DRV_TMR_SyncModeGet/
DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL - Synchronous Internal Clock Counter
• This mode can be used to provide the following capabilities:
• Create elapsed time measurements
• Create time delays
• Create periodic timer interrupts
• The input clock to the Timer is provided from the internal system clock
• The Timer increments in the effective delta time specified by the prescaler and the selected source clock
DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL_GATED - Synchronous Internal Gated Counter
• In this mode, the operation is dependent on an external signal applied to a pin assigned as a gate. When the gate signal
remains high, the Timer increments. When the gate signal goes low, the operation terminates.
• Input clock to the timer is provided from the internal system clock
• The Timer increments in the effective delta time specified by the prescaler and the selected source clock
• Gated Timer mode is not possible when the Timer is set to use external clock source
DRV_TMR_SYNC_MODE_SYNCHRONOUS_EXTERNAL_WITHOUT_CLKSYNC - Synchronous External Clock Counter
• The Synchronous External Clock Counter operation provides the following capabilities:
• Counting periodic or non-periodic pulses
• Uses the external clock as the time base for Timers
• The selected Timer increments on every rising edge of the clock input on the TxCK pin
DRV_TMR_SYNC_MODE_SYNCHRONOUS_EXTERNAL_WITH_CLKSYNC - Synchronous External Clock Counter
• The clock source for the Timer is provided externally
• The selected Timer increments on every rising edge of the input on the TxCK pin
• External Clock sync is enabled to operate in the Synchronous mode
DRV_TMR_SYNC_MODE_ASYNCHRONOUS_EXTERNAL_WITHOUT_CLKSYNC - Asynchronous External Clock Counter
• The Asynchronous Timer operation provides the following capabilities:
• The Timer can operate during Sleep mode and can generate an interrupt on a period register match that will wake the
processor from Sleep or Idle modes.
• The Timer can be clocked from the secondary oscillator for real-time clock applications
• The clock source for the Timer is provided externally
• The selected Timer increments on every rising edge of the clock input on the TxCK pin
• Synchronization with the external clock is disabled
DRV_TMR_SYNC_MODE_ASYNCHRONOUS_EXTERNAL_WITH_CLKSYNC - Asynchronous External Clock Counter
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• The clock source for the Timer is provided externally
• The selected Timer increments on every rising edge of the clock input on the TxCK pin
• Synchronization with the external clock is enabled
Changing the Sync Mode
Perform the following steps before changing the sync mode.
Preconditions: DRV_TMR_Open should have been called before calling this function and should have returned a valid handle.
1. Stop the TMR module using DRV_TMR_Stop.
2. Change the sync mode using DRV_TMR_SyncModeSet.
3. Update the counter using DRV_TMR_Counter[8Bit/16Bit/32Bit]Set, if applicable.
4. Start the TMR module using DRV_TMR_Start.
Example:
DRV_HANDLE handle;
/* Open the client */
handle = DRV_TMR_Open( DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE );
/* Stop the timer */
DRV_TMR_Stop( handle );
/* Change the sync mode */
DRV_TMR_SyncModeSet( handle, DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL );
/* Re-start the timer */
DRV_TMR_Start( handle );
Note: Not all modes are supported by all the Timer modules. Please refer the specific device data sheet to determine the
supported modes for your device.
5.1.10.4.3.4 Period Modification
This section describes Period modification for the different types of Timers (i.e., 8-/16-/32-bit).
Description
These set of functions help modify the Timer periodicity at the client level, regardless of whether it is an overflow or a period
match-based Timer.
This interface can be used to alter the already set periodicity at the system level interface DRV_TMR_Initialize.
Period Modification
Periodicity for the type of Timer (8-/16-/32-bit) can be controlled as follows:
• 8-bit timer periodicity can be modified using DRV_TMR_Period8BitSet and the current period value can be obtained using
DRV_TMR_Period8BitGet
• 16-bit timer periodicity can be modified using DRV_TMR_Period16BitSet and the current period value can be obtained using
DRV_TMR_Period16BitGet
• 32-bit timer periodicity can be modified using DRV_TMR_Period32BitSet and the current period value can be obtained using
DRV_TMR_Period32BitGet
Example:
DRV_HANDLE handle;
/* Open the client */
handle = DRV_TMR_Open( DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE );
/* ... */
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/* Update the new period */
DRV_TMR_Period16BitSet( handle, 0x0000C350);
5.1.10.4.3.5 Counter Modification
This section describes counter modification for the different types of Timers (i.e., 8-/16-/32-bit).
Description
These set of functions help modify the initial value of the Timer counters to help adjust any errors in the periodicity.
Counter Modification
Initial counter values can be controlled as follows:
• 8-bit timer initial value can be modified using DRV_TMR_Counter8BitSet and the current counter value can be obtained using
DRV_TMR_Counter8BitGet
• 16-bit timer initial value can be modified using DRV_TMR_Counter16BitSet and the current counter value can be obtained
using DRV_TMR_Counter16BitGet
• 32-bit timer initial value can be modified using DRV_TMR_Counter32BitSet and the current counter value can be obtained
using DRV_TMR_Counter32BitGet
Example:
DRV_HANDLE handle;
/* Open the client */
handle = DRV_TMR_Open( DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE );
/* ... */
/* Update the counter value */
/* Following code updates the initial value from 0x0000 to 0x0010
to cover up any error in the previously set periodicity */
DRV_TMR_Counter16BitSet( handle, 0x0010);
5.1.10.4.3.6 Core Functionality
This section describes core functionality of the Timer Driver.
Description
Core functionality provides a extremely basic interface for the driver operation.
Applications using the core Timer core functionality, need to perform the following:
1. The system should have completed the necessary initialization and DRV_TMR_Tasks should either be running in a polled
environment, or in an interrupt environment.
2. Open the driver using DRV_TMR_Open. The Timer Driver supports exclusive access only.
3. The Timer period will have to be updated using DRV_TMR_Period[8Bit/16Bit/32Bit]Set if the client intends to override the
already preset value during the initialization. The previously set value can be retrieved using
DRV_TMR_Period[8Bit/16Bit/32Bit]Get.
4. Start the driver using DRV_TMR_Start.
5. Poll for the elapse status using DRV_TMR_ElapsedStatusGetAndClear and handle the rest of the processing based on the
status.
6. The client will be able to stop the started Timer instance using DRV_TMR_Stop at any time and will be able to close it using
DRV_TMR_Close when it is no longer required.
Example :
DRV_HANDLE handle;
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/* Open the client */
handle = DRV_TMR_Open( DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE );
while (1)
{
// Interrupt mode & hence the DRV_TMR_Tasks not being called
// client handle returned by the Open API
if (true == DRV_TMR_ElapsedStatusGetAndClear(handle))
{
// Do something
}
}
Notes:
1. The user needs to stop the Timer before any updates on the counter or period and restart it later.
2. The Timer elapsed status gets reset after any counter or period update.
3. The Timer elapse status remains unchanged if the user tries to stop and restart later.
5.1.10.4.3.7 Alarm Functionality
This section describes the Timer Driver alarm functionality.
Description
The Timer Driver provides alarm functionality. This is an optional advanced feature and needs to be enabled using the
configuration macros.
Applications using the Timer alarm functionality, need to perform the following:
1. The system should have completed the necessary initialization and DRV_TMR_Tasks should either be running in a polled
environment, or in an interrupt environment.
2. Open the driver using DRV_TMR_Open. The Timer Driver supports exclusive access only.
3. Configure the alarm using DRV_TMR_AlarmSet with DRV_TMR_ALARM_CONFIG.
4. Start the driver using DRV_TMR_Start.
5. If a callback is configured, the Timer Driver will call the callback function when the alarm expires.
6. The client will be able to stop the started Timer module instance using DRV_TMR_Stop at any time and will be able to close it
using DRV_TMR_Close when it is no longer required.
Precondition: For the callback to work, the switch DRV_TMR_ALARM_ENABLE needs to be defined in the configuration
header.
Example:
DRV_HANDLE handle;
DRV_TMR_ALARM_CONFIG alarmConfig;
uint32_t alarmCount;
/* Open the client */
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
/* Configure the timer alarm feature */
/* Callbacks are only allowed when the configuration switch
DRV_TMR_ALARM_ENABLE is defined */
alarmConfig.type = DRV_TMR_ALARM_TYPE_PERIODIC;
alarmConfig.callback = &Callback;
DRV_TMR_AlarmSet (handle, &alarmConfig);
// Get all the alarm counters based on the number of alarm objects configured
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alarmCount = DRV_TMR_AlarmCountGet (handle);
// Clear the Alarm counters associated with the HW instance
DRV_TMR_AlarmCountClear (handle);
The callback function in the application will look like:
void Callback (void)
{
// Do something specific on an alarm event trigger
}
Note: The driver tasks function calls the client registered callback after the alarm expires.
5.1.10.4.3.8 Optional Interfaces
This section describes additional/optional client interfaces.
Description
Additional/Optional client interfaces include the following.
Get Operating Frequency
The function DRV_TMR_OperatingFrequencyGet provides the client with the information on the Timer operating frequency.
Example:
DRV_HANDLE handle;
uint32_t freq;
/* Open the client */
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
freq = DRV_TMR_OperatingFrequencyGet (handle);
Get Tick Frequency
The function DRV_TMR_TickFrequencyGet provides the client with the information on the Timer tick frequency.
Example:
DRV_HANDLE handle;
uint32_t freq;
/* Open the client */
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
freq = DRV_TMR_TickFrequencyGet (handle);
5.1.10.4.3.9 Example Usage of the Timer Driver
This section describes typical usage of the Timer Driver for various Timer modules in polling/interrupt advanced/core modes.
Description
Notes:
1. The interface calls remain the same whether using dynamic or static drivers.
2. There is a possibility that the user can pass NULL to the driver initialize interface. However, the respective configurations
matching the init [DRV_TMR_INIT] members need to be configured in the correct manner.
Example 1:
// Polling mode under 32-bit count mode for a PIC32 device using the alarm feature
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SYS_MODULE_OBJ object;
// main
DRV_TMR_INIT init;
DRV_HANDLE handle;
DRV_TMR_ALARM_CONFIG alConf;
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_2;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_TX_VALUE_256;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_3;
init.timerPeriod = 0xFF00;
object = DRV_TMR_Initialize (DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&init);
if ( SYS_STATUS_READY != DRV_TMR_Status(object))
return 0;
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if ( DRV_TMR_STATUS_READY != DRV_TMR_ClientStatus(handle))
return 0;
alConf.alType = DRV_TMR_ALARM_TYPE_PERIODIC;
alConf.alCallback = &TestAlarmCallback;
DRV_TMR_AlarmSet (handle, &alConf);
DRV_TMR_Start (handle);
while (1)
{
DRV_TMR_Tasks (object);
}
DRV_TMR_Stop (handle);
DRV_TMR_Close (handle);
if ( DRV_TMR_STATUS_INVALID != DRV_TMR_ClientStatus(handle))
return 0;
DRV_TMR_Deinitialize (object);
// end main
void TestAlarmCallback (void)
{
// Do something specific on an alarm event trigger
}
Example 2:
// Polling mode under 16-bit count mode for a PIC32/PIC24 device using the alarm feature
SYS_MODULE_OBJ object;
// main
DRV_TMR_INIT init;
DRV_HANDLE handle;
DRV_TMR_ALARM_CONFIG alConf;
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_3;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_TX_VALUE_256;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_3;
init.timerPeriod = 0xFF00;
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object = DRV_TMR_Initialize (DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&init);
if ( SYS_STATUS_READY != DRV_TMR_Status(object))
return 0;
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if ( DRV_TMR_STATUS_READY != DRV_TMR_ClientStatus(handle))
return 0;
alConf.alType = DRV_TMR_ALARM_TYPE_PERIODIC;
alConf.alCallback = &TestAlarmCallback;
DRV_TMR_AlarmSet (handle, &alConf);
DRV_TMR_Start (handle);
while (1)
{
DRV_TMR_Tasks (object);
}
DRV_TMR_Stop (handle);
DRV_TMR_Close (handle);
if ( DRV_TMR_STATUS_INVALID != DRV_TMR_ClientStatus(handle))
return 0;
DRV_TMR_Deinitialize (object);
// end main
void TestAlarmCallback (void)
{
// Do something specific on an alarm event trigger
}
Example 3:
// Polling mode under 16-bit count mode for a PIC18 device, with Timer3 using the alarm feature
SYS_MODULE_OBJ object;
// main
DRV_TMR_INIT init;
DRV_HANDLE handle;
DRV_TMR_ALARM_CONFIG alConf;
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_3;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_T1_VALUE_8;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_3;
init.timerPeriod = 0xFF00;
object = DRV_TMR_Initialize (DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&init);
if ( SYS_STATUS_READY != DRV_TMR_Status(object))
return 0;
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if ( DRV_TMR_STATUS_READY != DRV_TMR_ClientStatus(handle))
return 0;
alConf.alType = DRV_TMR_ALARM_TYPE_PERIODIC;
alConf.alCallback = &TestAlarmCallback;
DRV_TMR_AlarmSet (handle, &alConf);
DRV_TMR_Start (handle);
while (1)
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{
DRV_TMR_Tasks (object);
}
DRV_TMR_Stop (handle);
DRV_TMR_Close (handle);
if ( DRV_TMR_STATUS_INVALID != DRV_TMR_ClientStatus(handle))
return 0;
DRV_TMR_Deinitialize (object);
// end main
void TestAlarmCallback (void)
{
// Do something specific on an alarm event trigger
}
Example 4:
// Interrupt mode under 32-bit count mode for a PIC32 device using the alarm feature
SYS_MODULE_OBJ object;
// main
DRV_TMR_INIT init;
DRV_HANDLE handle;
DRV_TMR_ALARM_CONFIG alConf;
SYS_INT_Initialize ();
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_2;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_TX_VALUE_256;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_3;
init.timerPeriod = 0xFF00;
object = DRV_TMR_Initialize (DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&init);
if ( SYS_STATUS_READY != DRV_TMR_Status(object))
return 0;
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if ( DRV_TMR_STATUS_READY != DRV_TMR_ClientStatus(handle))
return 0;
alConf.alType = DRV_TMR_ALARM_TYPE_PERIODIC;
alConf.alCallback = &TestAlarmCallback;
DRV_TMR_AlarmSet (handle, &alConf);
SYS_INT_PrioritySet (PLIB_INT_SOURCE_TIMER_3, PLIB_INT_PRIORITY_LEVEL1);
SYS_INT_SubprioritySet (PLIB_INT_SOURCE_TIMER_3, PLIB_INT_SUBPRIORITY_LEVEL1);
DRV_TMR_Start (handle);
while (1);
DRV_TMR_Stop (handle);
DRV_TMR_Close (handle);
if ( DRV_TMR_STATUS_INVALID != DRV_TMR_ClientStatus(handle))
return 0;
DRV_TMR_Deinitialize (object);
// end main
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void TestAlarmCallback (void)
{
// Do something specific on an alarm event trigger
}
Example 5:
// Interrupt mode under 16-bit count mode for a PIC24 device using the alarm feature
SYS_MODULE_OBJ object;
// main
DRV_TMR_INIT init;
DRV_HANDLE handle;
DRV_TMR_ALARM_CONFIG alConf;
SYS_INT_Initialize ();
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_2;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_TX_VALUE_256;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_2;
init.timerPeriod = 0xFF00;
object = DRV_TMR_Initialize (DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&init);
if ( SYS_STATUS_READY != DRV_TMR_Status(object))
return 0;
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if ( DRV_TMR_STATUS_READY != DRV_TMR_ClientStatus(handle))
return 0;
alConf.alType = DRV_TMR_ALARM_TYPE_PERIODIC;
alConf.alCallback = &TestAlarmCallback;
DRV_TMR_AlarmSet (handle, &alConf);
SYS_INT_PrioritySet (PLIB_INT_SOURCE_TIMER_2, PLIB_INT_PRIORITY_LEVEL1);
DRV_TMR_Start (handle);
while (1);
DRV_TMR_Stop (handle);
DRV_TMR_Close (handle);
if ( DRV_TMR_STATUS_INVALID != DRV_TMR_ClientStatus(handle))
return 0;
DRV_TMR_Deinitialize (object);
//end main
void TestAlarmCallback (void)
{
// Do something specific on an alarm event trigger
}
Example 6:
// Polling mode under 32-bit count mode for a PIC32 device using core functionality
SYS_MODULE_OBJ object;
// main
DRV_TMR_INIT init;
DRV_HANDLE handle;
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init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_2;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_TX_VALUE_256;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_3;
init.timerPeriod = 0xFF00;
object = DRV_TMR_Initialize (DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&init);
if ( SYS_STATUS_READY != DRV_TMR_Status(object))
return 0;
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if ( DRV_TMR_STATUS_READY != DRV_TMR_ClientStatus(handle))
return 0;
DRV_TMR_Start (handle);
while (1)
{
DRV_TMR_Tasks (object);
if (true == DRV_TMR_ElapsedStatusGetAndClear(handle))
Callback();
}
DRV_TMR_Stop (handle);
DRV_TMR_Close (handle);
if ( DRV_TMR_STATUS_INVALID != DRV_TMR_ClientStatus(handle))
return 0;
DRV_TMR_Deinitialize (object);
// end main
void Callback (void)
{
// Do something specific
}
Example 7:
// Interrupt mode under 32-bit count mode for a PIC32 device using core functionality
SYS_MODULE_OBJ object;
// main
DRV_TMR_INIT init;
DRV_HANDLE handle;
DRV_TMR_ALARM_CONFIG alConf;
SYS_INT_Initialize ();
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_2;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_TX_VALUE_256;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_3;
init.timerPeriod = 0xFF00;
object = DRV_TMR_Initialize (DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&init);
if ( SYS_STATUS_READY != DRV_TMR_Status(object))
return 0;
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if ( DRV_TMR_STATUS_READY != DRV_TMR_ClientStatus(handle))
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return 0;
SYS_INT_PrioritySet (PLIB_INT_SOURCE_TIMER_3, PLIB_INT_PRIORITY_LEVEL1);
SYS_INT_SubprioritySet (PLIB_INT_SOURCE_TIMER_3, PLIB_INT_SUBPRIORITY_LEVEL1);
DRV_TMR_Start (handle);
while (1)
{
if (true == DRV_TMR_ElapsedStatusGetAndClear(handle))
Callback();
}
DRV_TMR_Stop (handle);
DRV_TMR_Close (handle);
if ( DRV_TMR_STATUS_INVALID != DRV_TMR_ClientStatus(handle))
return 0;
DRV_TMR_Deinitialize (object);
// end main
void Callback (void)
{
// Do something specific
}
Example 8:
// Polling mode under 16-bit count mode for a PIC18 device, with Timer3 using core functionality
SYS_MODULE_OBJ object;
// main
DRV_TMR_INIT init;
DRV_HANDLE handle;
DRV_TMR_ALARM_CONFIG alConf;
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_3;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_T1_VALUE_8;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_3;
init.timerPeriod = 0xFF00;
object = DRV_TMR_Initialize (DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&init);
if ( SYS_STATUS_READY != DRV_TMR_Status(object))
return 0;
handle = DRV_TMR_Open (DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if ( DRV_TMR_STATUS_READY != DRV_TMR_ClientStatus(handle))
return 0;
DRV_TMR_Start (handle);
while (1)
{
DRV_TMR_Tasks (object);
if (true == DRV_TMR_ElapsedStatusGetAndClear(handle))
Callback();
}
DRV_TMR_Stop (handle);
DRV_TMR_Close (handle);
if ( DRV_TMR_STATUS_INVALID != DRV_TMR_ClientStatus(handle))
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return 0;
DRV_TMR_Deinitialize (object);
// end main
void Callback (void)
{
// Do something specific
}
5.1.10.5 Configuring the Library
The configuration of the Timer Device Library is based on the file sys_config.h
This header file contains the configuration selection for the Timer Driver Library build. Based on the selections made here and
the system setup, the Timer Driver driver may or may not support selected features. These configuration settings will apply to all
instances of the driver.
This header can be placed anywhere in the application-specific folders and the path of this header needs to be presented to the
include search for a successful build. Refer to the Applications Overview section for more details.
5.1.10.5.1 Initialization Overrides
Macros
Name Description
DRV_TMR_CLOCK_SOURCE Timer module clock source selection.
DRV_TMR_PERIPHERAL_ID Timer peripheral ID selection.
DRV_TMR_POSTSCALE Macro controls post scale of the TMR
DRV_TMR_PRESCALE Timer module prescale value.
DRV_TMR_SOURCE_EDGE Timer module source edge.
DRV_TMR_SYNCHRONIZATION_MODE Controls Synchronization mode of the Timer.
DRV_TMR_TIMER_PERIOD Timer period value for an overflow or a period match-based Timer.
Description
This section provides initialization overrides for the run time options that can be selected using DRV_TMR_INIT when passed
into DRV_TMR_Initialize and DRV_TMR_Reintiailize. When any of these options are defined, the build time override will be used.
5.1.10.5.1.1 DRV_TMR_CLOCK_SOURCE Macro
C
#define DRV_TMR_CLOCK_SOURCE TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK
Description
TMR Clock Source
This macro selects the Timer module clock source based on the enumeration.
Remarks
If defined in the configuration, this takes priority over the initialization option.
Refer to the processor peripheral header for more information.
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5.1.10.5.1.2 DRV_TMR_PERIPHERAL_ID Macro
C
#define DRV_TMR_PERIPHERAL_ID TMR_ID_1
Description
TMR Peripheral ID Selection
This macro selects the Timer peripheral ID. This is an intialization override of the tmrID member of the intialization configuration.
Remarks
Some devices also support TMR_ID_0.
5.1.10.5.1.3 DRV_TMR_POSTSCALE Macro
C
#define DRV_TMR_POSTSCALE TMR_POSTSCALE_1_TO_1
Description
TMR post scale configuration
This macro controls the post scale of the TMR
Remarks
This feature is not available in all modules/devices. Refer to the specific device data sheet for more information.
5.1.10.5.1.4 DRV_TMR_PRESCALE Macro
C
#define DRV_TMR_PRESCALE TMR_PRESCALE_TX_1_TO_256
Description
TMR Prescale
This macro defines the Timer module prescale value.
Remarks
If defined in the configuration, this takes priority over the initialization option.
Refer to the processor peripheral header for more information.
5.1.10.5.1.5 DRV_TMR_SOURCE_EDGE Macro
C
#define DRV_TMR_SOURCE_EDGE TMR_SOURCE_EDGE_INCREMENT_ON_LOW_TO_HIGH
Description
TMR Source Edge
This macro defines the Timer module source edge.
Remarks
If defined in the configuration, this takes priority over the initialization option.
Refer to the processor peripheral header for more information.
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5.1.10.5.1.6 DRV_TMR_SYNCHRONIZATION_MODE Macro
C
#define DRV_TMR_SYNCHRONIZATION_MODE DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL
Description
TMR Synchronization mode configuration
This macro controls the Synchronization mode of the Timer. It accepts one of the possible values of the enumeration
DRV_TMR_SYNC_MODE.
Remarks
If defined in the configuration, this takes priority over the initialization option.
5.1.10.5.1.7 DRV_TMR_TIMER_PERIOD Macro
C
#define DRV_TMR_TIMER_PERIOD 0x4567
Description
TMR period value
This macro defines the Timer period value for an overflow or a period match-based Timer.
Remarks
If defined in the configuration, this macro takes priority over the initialization option. In addition, the limit is the maximum possible
Timer count width.
The user is required to provide the count value. The driver will internally adjust the value as required for the Timer hardware
based on the overflow or period match functionality
5.1.10.5.2 System Config
Macros
Name Description
DRV_TMR_COUNT_WIDTH Controls the mode of the Timer.
DRV_TMR_INDEX Timer static index selection.
DRV_TMR_INDEX_0 Timer driver index definitions
DRV_TMR_INDEX_1 This is macro DRV_TMR_INDEX_1.
DRV_TMR_INDEX_2 This is macro DRV_TMR_INDEX_2.
DRV_TMR_INDEX_3 This is macro DRV_TMR_INDEX_3.
DRV_TMR_INDEX_4 This is macro DRV_TMR_INDEX_4.
DRV_TMR_INDEX_5 This is macro DRV_TMR_INDEX_5.
DRV_TMR_INDEX_COUNT Number of valid Timer driver indices.
DRV_TMR_INSTANCES_NUMBER Sets up the maximum number of hardware instances that can be supported
by the dynamic driver.
DRV_TMR_INTERRUPT_MODE Controls operation of the driver in the interrupt or polled mode.
Description
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5.1.10.5.2.1 DRV_TMR_COUNT_WIDTH Macro
C
#define DRV_TMR_COUNT_WIDTH 16
Description
TMR mode configuration
This macro controls the mode of the Timer, and selects whether the timer is to support 8-bit, 16-bit or 32-bit mode. The
acceptable values of this configuration are:
• 8, (Use this for 8-bit timers)
• 16 (Use this for 16-bit timers)
• 32 (Use this for 32-bit timers)
Remarks
This is a mandatory configuration option, which enables the Timer count width.
5.1.10.5.2.2 DRV_TMR_INDEX Macro
C
#define DRV_TMR_INDEX DRV_TMR_INDEX_2
Description
TMR Static Index Selection
This definition selects the Timer Static Index for the driver object reference.
Remarks
This index is required to make a reference to the driver object.
5.1.10.5.2.3 DRV_TMR_INDEX_0 Macro
C
#define DRV_TMR_INDEX_0 0
Description
Timer Driver Module Index Numbers
These constants provide Timer driver index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals.
These values should be passed into the DRV_TMR_Initialize and DRV_TMR_Open functions to identify the driver instance in
use.
5.1.10.5.2.4 DRV_TMR_INDEX_1 Macro
C
#define DRV_TMR_INDEX_1 1
Description
This is macro DRV_TMR_INDEX_1.
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5.1.10.5.2.5 DRV_TMR_INDEX_2 Macro
C
#define DRV_TMR_INDEX_2 2
Description
This is macro DRV_TMR_INDEX_2.
5.1.10.5.2.6 DRV_TMR_INDEX_3 Macro
C
#define DRV_TMR_INDEX_3 3
Description
This is macro DRV_TMR_INDEX_3.
5.1.10.5.2.7 DRV_TMR_INDEX_4 Macro
C
#define DRV_TMR_INDEX_4 4
Description
This is macro DRV_TMR_INDEX_4.
5.1.10.5.2.8 DRV_TMR_INDEX_5 Macro
C
#define DRV_TMR_INDEX_5 5
Description
This is macro DRV_TMR_INDEX_5.
5.1.10.5.2.9 DRV_TMR_INDEX_COUNT Macro
C
#define DRV_TMR_INDEX_COUNT TMR_NUMBER_OF_MODULES
Description
Timer Driver Module Index Count
This constant identifies Timer driver index definitions.
Remarks
This constant should be used in place of hard-coded numeric literals.
This value is device-specific.
5.1.10.5.2.10 DRV_TMR_INSTANCES_NUMBER Macro
C
#define DRV_TMR_INSTANCES_NUMBER 1
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Description
Hardware instances support
This definition sets up the maximum number of hardware instances that can be supported by the dynamic driver.
Remarks
None
5.1.10.5.2.11 DRV_TMR_INTERRUPT_MODE Macro
C
#define DRV_TMR_INTERRUPT_MODE true
Description
TMR Interrupt And Polled Mode Operation Control
This macro controls the operation of the driver in the interrupt mode of operation. The possible values of this macro are:
• true - Select if interrupt mode of timer operation is desired
• false - Select if polling mode of timer operation is desired
Not defining this option to true or false will result in a build error.
Remarks
None.
5.1.10.5.3 Alarm Config
Macros
Name Description
DRV_TMR_ALARM_ENABLE Enables alarm functionality.
DRV_TMR_ALARM_PERIODIC Alarm type configuration.
Description
5.1.10.5.3.1 DRV_TMR_ALARM_ENABLE Macro
C
#define DRV_TMR_ALARM_ENABLE
Description
Alarm feature configuration option
This feature enables the alarm functionality inside the Timer driver.
Remarks
This is an optional feature. If the user wants to be called after a time elapse, alarm callback registration is mandatory.
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5.1.10.5.3.2 DRV_TMR_ALARM_PERIODIC Macro
C
#define DRV_TMR_ALARM_PERIODIC true
Description
Alarm type configuration option
This macro if defined, makes the alarm periodic. This macro can accept the following values:
• true - Configures the alarm in periodic mode
• false - Configures the alarm in one shot mode
Remarks
This is an optional feature, which is enabled when using this configuration.
5.1.10.5.4 Client Config
Macros
Name Description
DRV_TMR_CLIENTS_NUMBER Selects the maximum number of clients
Description
5.1.10.5.4.1 DRV_TMR_CLIENTS_NUMBER Macro
C
#define DRV_TMR_CLIENTS_NUMBER 1
Description
Client support
This definition select the maximum number of clients that the Timer driver can support at run time.
Remarks
None.
5.1.10.5.5 Miscellaneous Config
Macros
Name Description
DRV_TMR_ASYNC_WRITE_ENABLE Controls Asynchronous Write mode of the Timer.
DRV_TMR_PRESCALER_ENABLE Controls prescaler assignment of the Timer.
Description
These configuration options control the functionality and setup of the Timer Driver.
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5.1.10.5.5.1 DRV_TMR_ASYNC_WRITE_ENABLE Macro
C
#define DRV_TMR_ASYNC_WRITE_ENABLE false
Description
TMR Asynchronous write mode configuration
This macro controls the Asynchronous Write mode of the Timer. This macro accepts the following values:
• true - Configures the Timer to enable async write control
• false - Configures the Timer to disable async write control
• DRV_CONFIG_NOT_SUPPORTED - When the feature is not supported on the instance.
Remarks
This feature is not available in all modules/devices. Refer to the specific device data sheet for more information.
5.1.10.5.5.2 DRV_TMR_PRESCALER_ENABLE Macro
C
#define DRV_TMR_PRESCALER_ENABLE false
Description
TMR prescaler assignment configuration
This macro controls the prescaler assignment of the TMR. This macro accepts the following values:
• true - Configures the Timer for enable prescaler assignment
• false - Configures the Timer for disable prescaler assignment
• DRV_CONFIG_NOT_SUPPORTED - When the feature is not supported on the instance
Remarks
This feature is not available in all modules/devices. Refer to the specific device data sheet for more information.
5.1.10.5.6 Alarm Functionality Examples
Files
Name Description
drv_tmr_config_alarm.h Timer driver configuration definitions for the alarm feature.
Description
5.1.10.5.6.1 drv_tmr_config_alarm.h
TMR Driver Configuration Definitions for Alarm feature
These definitions set up the driver for the alarm feature.
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File Name
drv_tmr_config_alarm.h
Company
Microchip Technology Inc.
5.1.10.6 Building the Library
This section list the files that are available in the \src of the timer driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.1.10.7 Library Interface
Data Types and Constants
Name Description
DRV_TMR_ALARM_CONFIG Timer module alarm configuration.
DRV_TMR_ALARM_TYPE Timer driver type enumeration.
DRV_TMR_CALLBACK Pointer to a Timer driver callback function data type.
DRV_TMR_CLIENT_STATUS Identifies the client-specific status of the Timer driver
DRV_TMR_INIT Defines the Timer driver initialization data.
DRV_TMR_SYNC_MODE Identifies the synchronous modes for the Timer driver.
Macros
Name Description
DRV_TMR_INTERRUPT_SOURCE Defines the interrupt source of the static driver.
DRV_TMR_POWER_STATE Controls the power state of the Timer.
DRV_TMR_UNIFIED Sets up the driver functionlity in either split or the unified mode.
Alarm Functions
Name Description
DRV_TMR_AlarmCountClear Clears the alarm elapse counter.
DRV_TMR_AlarmCountGet Provides the number of times the alarm has elapsed since the last time it was
cleared.
DRV_TMR_AlarmSet Initializes an alarm.
Core Functions
Name Description
DRV_TMR_ClientStatus Gets current client-specific status of the Timer driver.
DRV_TMR_Close Closes an opened instance of the Timer driver
DRV_TMR_ElapsedStatusGetAndClear Provides and clears the Timer's elapse count.
DRV_TMR_Open Opens the specified Timer driver instance and returns a handle to it.
DRV_TMR_Start Starts the Timer counting.
DRV_TMR_Stop Stops the Timer from counting.
DRV_TMR_SyncModeGet Provides the Timer's current synchronization mode.
DRV_TMR_SyncModeSet Changes the Timer's synchronization mode.
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Counter Control Functions
Name Description
DRV_TMR_Counter16BitGet Provides the 16-bit Timer's current counter value.
DRV_TMR_Counter16BitSet Updates the 16-bit Timer's initial count value.
DRV_TMR_Counter32BitGet Provides the 32-bit Timer's current counter value.
DRV_TMR_Counter32BitSet Updates the 32-bit Timer's initial count value.
DRV_TMR_Counter8BitGet Provides the 8-bit Timer's current counter value.
DRV_TMR_Counter8BitSet Updates the 8-bit Timer's initial count value
Miscellaneous Functions
Name Description
DRV_TMR_OperatingFrequencyGet Provides the Timer operating frequency.
DRV_TMR_TickFrequencyGet Provides the Timer's counter "tick" frequency.
DRV_TMR_VersionGet Gets the Timer driver version in numerical format.
DRV_TMR_VersionStrGet Gets the Timer driver version in string format.
Period Functions
Name Description
DRV_TMR_Period16BitGet Provides the 16-bit Timer's period
DRV_TMR_Period16BitSet Updates the 16-bit Timer's period.
DRV_TMR_Period32BitGet Provides the 32-bit Timer's period
DRV_TMR_Period32BitSet Updates the 32-bit Timer's period.
DRV_TMR_Period8BitGet Provides the 8-bit Timer's period.
DRV_TMR_Period8BitSet Updates the 8-bit timer's period
System Interaction Functions
Name Description
DRV_TMR_Deinitialize Deinitializes the specified instance of the Timer driver.
DRV_TMR_Initialize Initializes the Timer driver .
DRV_TMR_Reinitialize Reinitializes the driver and refreshes any associated hardware settings.
DRV_TMR_Status Provides the current status of the Timer driver.
DRV_TMR_Tasks Maintains the driver's state machine and implements its ISR.
Description
This section describes the functions of the Timer Driver Library.
Refer to each section for a detailed description.
5.1.10.7.1 System Interaction Functions
5.1.10.7.1.1 DRV_TMR_Deinitialize Function
C
void DRV_TMR_Deinitialize(
SYS_MODULE_OBJ object
);
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Description
Deinitializes the specified instance of the Timer driver, disabling its operation (and any hardware). All internal data is invalidated.
Preconditions
The DRV_TMR_Initialize function must have been called before calling this function and a valid SYS_MODULE_OBJ must have
been returned.
Parameters
Parameters Description
object Driver object handle, returned from DRV_TMR_Initialize
Returns
None.
Remarks
Once the Initialize operation has been called, the Deinitialize operation must be called before the Initialize operation can be
called again.
This function will NEVER block waiting for hardware. If the operation requires time to allow the hardware to complete, this will be
reported by the DRV_TMR_Status operation. The system has to use DRV_TMR_Status to find out when the module is in the
ready state.
Example
SYS_MODULE_OBJ object; // Returned from DRV_TMR_Initialize
SYS_STATUS status;
DRV_TMR_Deinitialize(object);
status = DRV_TMR_Status(object);
if (SYS_MODULE_DEINITIALIZED == status)
{
// Check again later if you need to know
// when the driver is deinitialized.
}
5.1.10.7.1.2 DRV_TMR_Initialize Function
C
SYS_MODULE_OBJ DRV_TMR_Initialize(
const SYS_MODULE_INDEX drvIndex,
const SYS_MODULE_INIT * const init
);
Description
This function initializes the Timer driver, making it ready for clients to open and use it.
Preconditions
None.
Parameters
Parameters Description
drvIndex Index for the driver instance to be initialized
init Pointer to a data structure containing any data necessary to initialize the driver.
This pointer may be null if the user wants to provide the information via the
respective configuration macros.
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Returns
If successful, returns a valid handle to a driver object. Otherwise, it returns SYS_MODULE_OBJ_INVALID. The returned object
must be passed as argument to DRV_TMR_Reinitialize, DRV_TMR_Deinitialize, DRV_TMR_Tasks and DRV_TMR_Status
functions.
Remarks
This function must be called before any other Timer function is called.
This function should only be called once during system initialization unless DRV_TMR_Deinitialize is called to deinitialize the
driver instance.
This function will NEVER block for hardware access. If the operation requires time to allow the hardware to reinitialize, it will be
reported by the DRV_TMR_Status operation. The system must use DRV_TMR_Status to find out when the driver is in the ready
state.
Build configuration options may be used to staticaly override options in the "init" sructure and will take precedance over
initialization data passed using this function.
Example
DRV_TMR_INIT init;
SYS_MODULE_OBJ objectHandle;
// Populate the timer initialization structure
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_2;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_TX_VALUE_256;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_2;
init.timerPeriod = 0xABCD;
// Do something
objectHandle = DRV_TMR_Initialize(DRV_TMR_INDEX_0, (SYS_MODULE_INIT*)&init);
if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
5.1.10.7.1.3 DRV_TMR_Reinitialize Function
C
void DRV_TMR_Reinitialize(
SYS_MODULE_OBJ object,
const SYS_MODULE_INIT* const init
);
Description
This function reinitializes the driver and refreshes any associated hardware settings using the initialization data given, but it will
not interrupt any ongoing operations.
Preconditions
The DRV_TMR_Initialize function must have been called before calling this function and a valid SYS_MODULE_OBJ must have
been returned.
Parameters
Parameters Description
object Driver object handle, returned from DRV_TMR_Initialize
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init Pointer to the initialization data structure
Returns
None
Remarks
This function can be called multiple times to reinitialize the module.
This operation can be used to refresh any supported hardware registers as specified by the initialization data or to change the
power state of the module.
This function will NEVER block for hardware access. If the operation requires time to allow the hardware to reinitialize, it will be
reported by the DRV_TMR_Status operation. The system must use DRV_TMR_Status to find out when the driver is in the ready
state.
Build configuration options may be used to staticaly override options in the "init" sructure and will take precedance over
initialization data passed using this function.
Example
DRV_TMR_INIT init;
SYS_MODULE_OBJ objectHandle; // Returned from DRV_TMR_Initialize
SYS_STATUS tmrStatus;
// Iopulate the timer initialization structure
init.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
init.tmrId = TMR_ID_2;
init.clockSource = TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK;
init.prescale = TMR_PRESCALE_TX_VALUE_256;
init.syncMode = DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL;
init.interruptSource = INT_SOURCE_TIMER_3;
init.timerPeriod = 0xABCD;
DRV_TMR_Reinitialize(objectHandle, (SYS_MODULE_INIT*)&init);
tmrStatus = DRV_TMR_Status(object);
if (SYS_STATUS_BUSY == tmrStatus)
{
// Check again later to ensure the driver is ready
}
else if (SYS_STATUS_ERROR >= tmrStatus)
{
// Handle error
}
5.1.10.7.1.4 DRV_TMR_Status Function
C
SYS_STATUS DRV_TMR_Status(
SYS_MODULE_OBJ object
);
Description
This function provides the current status of the Timer driver.
Preconditions
The DRV_TMR_Initialize functino must have been called before calling this function.
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Parameters
Parameters Description
object Driver object handle, returned from DRV_TMR_Initialize
Returns
SYS_STATUS_READY - Indicates that the driver is busy with a previous system level operation and cannot start another
Remarks
Any value greater than SYS_STATUS_READY is also a normal running state in which the driver is ready to accept new
operations.
SYS_STATUS_BUSY - Indicates that the driver is busy with a previous system level operation and cannot start another
SYS_STATUS_ERROR - Indicates that the driver is in an error state
Any value less than SYS_STATUS_ERROR is also an error state.
SYS_MODULE_DEINITIALIZED - Indicates that the driver has been deinitialized
This value is less than SYS_STATUS_ERROR.
The this operation can be used to determine when any of the driver's module level operations has completed.
If the status operation returns SYS_STATUS_BUSY, the a previous operation has not yet completed. Once the status operation
returns SYS_STATUS_READY, any previous operations have completed.
The value of SYS_STATUS_ERROR is negative (-1). Any value less than that is also an error state.
This function will NEVER block waiting for hardware.
If the Status operation returns an error value, the error may be cleared by calling the reinitialize operation. If that fails, the
deinitialize operation will need to be called, followed by the initialize operation to return to normal operations.
Example
SYS_MODULE_OBJ object; // Returned from DRV_TMR_Initialize
SYS_STATUS tmrStatus;
tmrStatus = DRV_TMR_Status(object);
else if (SYS_STATUS_ERROR >= tmrStatus)
{
// Handle error
}
5.1.10.7.1.5 DRV_TMR_Tasks Function
C
void DRV_TMR_Tasks(
SYS_MODULE_OBJ object
);
Description
This function is used to maintain the driver's internal state machine and implement its ISR for interrupt-driven implementations.
Preconditions
The DRV_TMR_Initialize function must have been called for the specified Timer driver instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from DRV_TMR_Initialize)
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Returns
None
Remarks
This function is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
appropriate raw ISR.
This function may excute in an ISR context and will never block or access any resources that may cause it to block.
Example
SYS_MODULE_OBJ object; // Returned from DRV_TMR_Initialize
while (true)
{
DRV_TMR_Tasks (object);
// Do other tasks
}
5.1.10.7.2 Core Functions
5.1.10.7.2.1 DRV_TMR_ClientStatus Function
C
DRV_TMR_CLIENT_STATUS DRV_TMR_ClientStatus(
DRV_HANDLE handle
);
Description
This function gets the client-specfic status of the Timer driver associated with the specified handle.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
A DRV_TMR_CLIENT_STATUS value describing the current status of the driver
Remarks
This function will not block for hardware access and will immediately return the current status.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_CLIENT_STATUS tmrClientStatus;
tmrClientStatus = DRV_TMR_ClientStatus(tmrHandle);
if(DRV_TMR_CLIENT_STATUS_ERROR >= tmrClientStatus)
{
// Handle the error
}
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5.1.10.7.2.2 DRV_TMR_Close Function
C
void DRV_TMR_Close(
DRV_HANDLE handle
);
Description
This function closes an opened instance of the Timer driver, invalidating the handle.
Preconditions
The DRV_TMR_Initialize function must have been called for the specified Timer driver instance.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
None
Remarks
After calling this function, the handle passed in "handle" must not be used with any of the remaining driver functions. A new
handle must be obtained by calling DRV_TMR_Open before the caller may use the driver again.
If DRV_IO_INTENT_BLOCKING was requested and the driver was built appropriately to support blocking behavior, the call may
block until the operation is complete.
If DRV_IO_INTENT_NON_BLOCKING request the driver client can call the DRV_TMR_Status operation to find out when the
module is in the ready state (the handle is no longer valid).
Usually there is no need for the driver client to verify that the Close operation has completed.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_Close(handle);
5.1.10.7.2.3 DRV_TMR_ElapsedStatusGetAndClear Function
C
bool DRV_TMR_ElapsedStatusGetAndClear(
DRV_HANDLE handle
);
Description
This function provides the Timer's elapse count and resets it to zero (0).
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
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Parameters
Parameters Description
handle A valid handle, returned from the DRV_TMR_Open
Returns
• true - The Timer has elapsed
• false - The Timer has not yet elapsed
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
bool elapseStatus;
elapseStatus = DRV_TMR_ElapsedStatusGetAndClear(handle);
if (elapseStatus > 0)
{
// The counter period has elapsed.
}
5.1.10.7.2.4 DRV_TMR_Open Function
C
DRV_HANDLE DRV_TMR_Open(
const SYS_MODULE_INDEX drvIndex,
const DRV_IO_INTENT intent
);
Description
This function opens the specified Timer driver instance and provides a handle that must be provided to all other client-level
operations to identify the caller and the instance of the driver.
Preconditions
The DRV_TMR_Initialize functino must have been called before calling this function.
Parameters
Parameters Description
drvIndex Identifier for the object instance to be opened
intent Zero or more of the values from the enumeration DRV_IO_INTENT ORed together
to indicate the intended use of the driver
Returns
If successful, the function returns a valid open instance handle (a number identifying both the caller and the module instance).
If an error occurs, the return value is DRV_HANDLE_INVALID.
Remarks
The handle returned is valid until the DRV_TMR_Close function is called.
This function will NEVER block waiting for hardware.
If the DRV_IO_INTENT_BLOCKING is requested and the driver was built appropriately to support blocking behavior, other
client-level operations may block waiting on hardware until they are complete.
If DRV_IO_INTENT_NON_BLOCKING is requested the driver client can call the DRV_TMR_ClientStatus operation to find out
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when the module is in the ready state.
If the requested intent flags are not supported, the function will return DRV_HANDLE_INVALID.
The Timer driver does not support DRV_IO_INTENT_SHARED. It must be opened with DRV_IO_INTENT_EXCLUSIVE in the
"intent" parameter.
Example
DRV_HANDLE handle;
handle = DRV_TMR_Open(DRV_TMR_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if (DRV_HANDLE_INVALID == handle)
{
// Unable to open the driver
}
5.1.10.7.2.5 DRV_TMR_Start Function
C
void DRV_TMR_Start(
DRV_HANDLE handle
);
Description
This function starts the Timer counting.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
None.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_Start (handle);
5.1.10.7.2.6 DRV_TMR_Stop Function
C
void DRV_TMR_Stop(
DRV_HANDLE handle
);
Description
This function stops the running Timer from counting.
Preconditions
The DRV_TMR_Initialize function must have been called.
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DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
None.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_Stop(handle);
5.1.10.7.2.7 DRV_TMR_SyncModeGet Function
C
DRV_TMR_SYNC_MODE DRV_TMR_SyncModeGet(
DRV_HANDLE handle
);
Description
This function provides the Timer's current synchronization mode.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
Possible values from the enumeration DRV_TMR_SYNC_MODE.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_SYNC_MODE mode;
mode = DRV_TMR_SyncModeGet(handle);
5.1.10.7.2.8 DRV_TMR_SyncModeSet Function
C
void DRV_TMR_SyncModeSet(
DRV_HANDLE handle,
DRV_TMR_SYNC_MODE newMode
);
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Description
This function changes the Timer's synchronization mode.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
mode Possible values from the enumeration DRV_TMR_SYNC_MODE
Returns
None.
Remarks
The caller should stop the Timer/Counter before changing the synchronization mode and restart it afterward.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_Stop(handle);
DRV_TMR_SyncModeSet(handle, DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL);
5.1.10.7.3 Alarm Functions
5.1.10.7.3.1 DRV_TMR_AlarmCountClear Function
C
void DRV_TMR_AlarmCountClear(
DRV_HANDLE handle
);
Description
This function clears the alarm elapse counter.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid handle, returned from DRV_TMR_Open
Returns
None.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
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DRV_TMR_AlarmCountClear(handle);
5.1.10.7.3.2 DRV_TMR_AlarmCountGet Function
C
unsigned int DRV_TMR_AlarmCountGet(
DRV_HANDLE handle
);
Description
This function provides the number of times the alarm is generated since the last time it was cleared.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid handle, returned from DRV_TMR_Open
Returns
Alarm count value.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
unsigned int alarmCount;
alarmCount = DRV_TMR_AlarmCountGet (handle);
5.1.10.7.3.3 DRV_TMR_AlarmSet Function
C
void DRV_TMR_AlarmSet(
DRV_HANDLE handle,
const DRV_TMR_ALARM_CONFIG * config
);
Description
This function initializes an alarm, allowing the client to receive a callback from the driver when the counter period elapses.
Alarms can be one-shot or periodic.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid handle, returned from DRV_TMR_Open
config Pointer to the alarm configuration structure containing any data necessary to
initialize timer alarms
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Returns
None
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_ALARM_CONFIG alarmConfig;
alarmConfig.type = DRV_TMR_ALARM_TYPE_PERIODIC; // Periodic Alarm
alarmConfig.callback = &callBackFunction; // callback registered
DRV_TMR_AlarmSet(handle, config);
5.1.10.7.4 Period Functions
5.1.10.7.4.1 DRV_TMR_Period16BitGet Function
C
uint16_t DRV_TMR_Period16BitGet(
DRV_HANDLE handle
);
Description
This function provides the 16-bit tTmer's period.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
16-bit timer period value
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
uint16_t value;
value = DRV_TMR_Period16BitGet(handle);
5.1.10.7.4.2 DRV_TMR_Period16BitSet Function
C
void DRV_TMR_Period16BitSet(
DRV_HANDLE handle,
uint16_t value
);
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Description
This function updates the 16-bit Timer's period.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
value 16-bit Period value
Returns
None.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_Period16BitSet(handle, 0x1000);
5.1.10.7.4.3 DRV_TMR_Period32BitGet Function
C
uint32_t DRV_TMR_Period32BitGet(
DRV_HANDLE handle
);
Description
This function provides the 32-bit Timer's period.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
32-bit Timer period value.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
uint32_t value;
value = DRV_TMR_Period32BitGet(handle);
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5.1.10.7.4.4 DRV_TMR_Period32BitSet Function
C
void DRV_TMR_Period32BitSet(
DRV_HANDLE handle,
uint32_t value
);
Description
This function updates the 32-bit Timer's period.
Preconditions
The DRV_TMR_Initialize unction must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
value 32-bit Period value
Returns
None.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_Period32BitSet(handle, 0xFFFFFFFF);
5.1.10.7.4.5 DRV_TMR_Period8BitGet Function
C
uint8_t DRV_TMR_Period8BitGet(
DRV_HANDLE handle
);
Description
This function provides the 8-bit Timer's period.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
8-bit timer period value.
Remarks
None.
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Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
uint8_t value;
value = DRV_TMR_Period8BitGet(handle);
5.1.10.7.4.6 DRV_TMR_Period8BitSet Function
C
void DRV_TMR_Period8BitSet(
DRV_HANDLE handle,
uint8_t value
);
Description
This function updates the 8-bit timer's period.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
value 8-bit Period value
Returns
None.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_Period8BitSet(handle, 0x10);
5.1.10.7.5 Counter Control Functions
5.1.10.7.5.1 DRV_TMR_Counter16BitGet Function
C
uint16_t DRV_TMR_Counter16BitGet(
DRV_HANDLE handle
);
Description
This function provides the 16-bit Timer's current counter value.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
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Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
16-bit Timer's current counter value
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
uint16_t value;
value = DRV_TMR_Counter16BitGet(handle);
5.1.10.7.5.2 DRV_TMR_Counter16BitSet Function
C
void DRV_TMR_Counter16BitSet(
DRV_HANDLE handle,
uint16_t value
);
Description
This function updates the 16-bit Timer's initial count value.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
value 16-bit Counter value
Returns
None.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_Counter16BitSet(handle, 0x1000);
5.1.10.7.5.3 DRV_TMR_Counter32BitGet Function
C
uint32_t DRV_TMR_Counter32BitGet(
DRV_HANDLE handle
);
Description
This function provides the 32-bit Timer's current counter value.
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Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
32-bit Timer's current counter value.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
uint32_t value;
value = DRV_TMR_Counter32BitGet(handle);
5.1.10.7.5.4 DRV_TMR_Counter32BitSet Function
C
void DRV_TMR_Counter32BitSet(
DRV_HANDLE handle,
uint32_t value
);
Description
This function updates the 32-bit Timer's initial count value.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
value 32-bit Counter value
Returns
None.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_Counter32BitSet(handle, 0xFFFFFFFF);
5.1.10.7.5.5 DRV_TMR_Counter8BitGet Function
C
uint8_t DRV_TMR_Counter8BitGet(
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DRV_HANDLE handle
);
Description
This function provides the 8-bit Timer's current counter value.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
8-bit Timer's current counter value.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
uint8_t value;
value = DRV_TMR_Counter8BitGet(handle);
5.1.10.7.5.6 DRV_TMR_Counter8BitSet Function
C
void DRV_TMR_Counter8BitSet(
DRV_HANDLE handle,
uint8_t value
);
Description
This function updates the 8-bit Timer's initial count value.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
value 8-bit Counter value
Returns
None.
Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
DRV_TMR_Counter8BitSet(handle, 0x10);
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5.1.10.7.6 Miscellaneous Functions
5.1.10.7.6.1 DRV_TMR_OperatingFrequencyGet Function
C
uint32_t DRV_TMR_OperatingFrequencyGet(
DRV_HANDLE handle
);
Description
This function provides the Timer operating frequency.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
32-bit value corresponding to the running frequency.
Remarks
On most processers, the Timer's base frequency is the same as the peripheral bus clock.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
uint32_t clkFreq;
clkFreq = DRV_TMR_OperatingFrequencyGet(handle);
5.1.10.7.6.2 DRV_TMR_TickFrequencyGet Function
C
uint32_t DRV_TMR_TickFrequencyGet(
DRV_HANDLE handle
);
Description
This function provides the Timer's counter "tick" frequency.
Preconditions
The DRV_TMR_Initialize function must have been called.
DRV_TMR_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid handle, returned from the DRV_TMR_Open
Returns
Clock frequency value in cycles per second (Hertz).
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Remarks
None.
Example
DRV_HANDLE handle; // Returned from DRV_TMR_Open
uint32_t clkFreq;
clkFreq = DRV_TMR_TickFrequencyGet(handle);
5.1.10.7.6.3 DRV_TMR_VersionGet Function
C
unsigned int DRV_TMR_VersionGet(
const SYS_MODULE_INDEX drvIndex
);
Description
This function gets the Timer driver version. The version is encoded as major * 10000 + minor * 100 + patch. The stringed version
can be obtained using DRV_TMR_VersionStrGet()
Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the object instance to get the version for
Returns
Current driver version in numerical format.
Remarks
None.
Example
unsigned int version;
version = DRV_TMR_VersionGet( DRV_TMR_INDEX_0 );
if(version < 110200)
{
// Do Something
}
5.1.10.7.6.4 DRV_TMR_VersionStrGet Function
C
char * DRV_TMR_VersionStrGet(
const SYS_MODULE_INDEX drvIndex
);
Description
This function gets the Timer driver version. The version is returned as major.minor.path[type], where type is optional. The
numerical version can be obtained using DRV_TMR_VersionGet.
Preconditions
None.
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Parameters
Parameters Description
drvIndex Identifier for the object instance to get the version for
Returns
Current Timer driver version in the string format.
Remarks
None.
Example
char *version;
version = DRV_TMR_VersionStrGet( DRV_TMR_INDEX_0 );
printf("%s", version);
5.1.10.7.7 Data Types and Constants
5.1.10.7.7.1 DRV_TMR_ALARM_CONFIG Structure
C
typedef struct {
DRV_TMR_ALARM_TYPE type;
DRV_TMR_CALLBACK callback;
} DRV_TMR_ALARM_CONFIG;
Description
TMR Alarm configuration
This data type controls the configuration of the alarm.
Members
Members Description
DRV_TMR_ALARM_TYPE type; Type of the alarm one shot or periodic
DRV_TMR_CALLBACK callback; Alarm callback
Remarks
Not all modes are available on all devices.
5.1.10.7.7.2 DRV_TMR_ALARM_TYPE Enumeration
C
typedef enum {
DRV_TMR_ALARM_TYPE_ONE_SHOT,
DRV_TMR_ALARM_TYPE_PERIODIC
} DRV_TMR_ALARM_TYPE;
Description
Timer Alarm Type Enumeration
This data type identifies the Timer alarm type.
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Members
Members Description
DRV_TMR_ALARM_TYPE_ONE_SHOT One Shot Alarm
DRV_TMR_ALARM_TYPE_PERIODIC Periodic Alarm
Remarks
Not all modes are available on all devices.
5.1.10.7.7.3 DRV_TMR_CALLBACK Type
C
typedef void (* DRV_TMR_CALLBACK)(void);
Description
Timer Driver Callback Function Pointer
This data type defines a pointer to a Timer driver callback function.
Remarks
Useful only when timer alarm callback support is enabled by defining the DRV_TMR_ALARM_ENABLE configuration option.
5.1.10.7.7.4 DRV_TMR_CLIENT_STATUS Enumeration
C
typedef enum {
DRV_TMR_CLIENT_STATUS_INVALID,
DRV_TMR_CLIENT_STATUS_ERROR,
DRV_TMR_CLIENT_STATUS_BUSY,
DRV_TMR_CLIENT_STATUS_READY,
DRV_TMR_CLIENT_STATUS_STOPPED,
DRV_TMR_CLIENT_STATUS_STARTED
} DRV_TMR_CLIENT_STATUS;
Description
Timer Driver Client Status
This enumeration identifies the client-specific status of the Timer driver.
Members
Members Description
DRV_TMR_CLIENT_STATUS_INVALID Client in an invalid (or unopened) state
DRV_TMR_CLIENT_STATUS_ERROR Unspecified error condition
DRV_TMR_CLIENT_STATUS_BUSY An operation is currently in progress
DRV_TMR_CLIENT_STATUS_READY Up and running, no operations running
DRV_TMR_CLIENT_STATUS_STOPPED Timer stopped (not running), but ready to accept commands
DRV_TMR_CLIENT_STATUS_STARTED Timer started and running, processing transactions
Remarks
None.
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5.1.10.7.7.5 DRV_TMR_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
TMR_MODULE_ID tmrId;
TMR_CLOCK_SOURCE clockSource;
uint32_t timerPeriod;
TMR_PRESCALE prescale;
TMR_CLOCK_SOURCE_EDGE sourceEdge;
uint8_t postscale;
DRV_TMR_SYNC_MODE syncMode;
INT_SOURCE interruptSource;
} DRV_TMR_INIT;
Description
Timer Driver Initialize Data
This data type defines data required to initialize or reinitialize the Timer driver.
Members
Members Description
SYS_MODULE_INIT moduleInit; System module initialization
TMR_MODULE_ID tmrId; Identifies timer hardware module (PLIB-level) ID
TMR_CLOCK_SOURCE clockSource; Clock Source select enumeration
uint32_t timerPeriod; Timer Period Value
TMR_PRESCALE prescale; Prescaler Selection from the processor enumeration
TMR_CLOCK_SOURCE_EDGE
sourceEdge;
TMR Source Edge Selection
uint8_t postscale; Post Scale Selection
DRV_TMR_SYNC_MODE syncMode; Timer Sync Mode
INT_SOURCE interruptSource; Interrupt Source for TMR module
Remarks
Not all initialization features are available on all devices.
5.1.10.7.7.6 DRV_TMR_SYNC_MODE Enumeration
C
typedef enum {
DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL,
DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL_GATED,
DRV_TMR_SYNC_MODE_SYNCHRONOUS_EXTERNAL_WITHOUT_CLKSYNC,
DRV_TMR_SYNC_MODE_SYNCHRONOUS_EXTERNAL_WITH_CLKSYNC,
DRV_TMR_SYNC_MODE_ASYNCHRONOUS_EXTERNAL_WITHOUT_CLKSYNC,
DRV_TMR_SYNC_MODE_ASYNCHRONOUS_EXTERNAL_WITH_CLKSYNC,
DRV_TMR_SYNC_MODE_IDLE
} DRV_TMR_SYNC_MODE;
Description
Timer Synchronous Modes
This data type identifies the synchronous modes for the Timer driver.
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Members
Members Description
DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL Synchronous Internal Clock Counter
DRV_TMR_SYNC_MODE_SYNCHRONOUS_INTERNAL_GATED Synchronous Internal Gated Counter
DRV_TMR_SYNC_MODE_SYNCHRONOUS_EXTERNAL_WITHOUT_CLKSYNC Synchronous External Clock Counter
DRV_TMR_SYNC_MODE_SYNCHRONOUS_EXTERNAL_WITH_CLKSYNC Synchronous External Clock Counter
DRV_TMR_SYNC_MODE_ASYNCHRONOUS_EXTERNAL_WITHOUT_CLKSYNC Asynchronous External Clock Counter
DRV_TMR_SYNC_MODE_ASYNCHRONOUS_EXTERNAL_WITH_CLKSYNC Asynchronous External Clock Counter
DRV_TMR_SYNC_MODE_IDLE Timer Idle Mode
Remarks
Not all modes are available on all devices.
5.1.10.7.8 Macros
5.1.10.7.8.1 DRV_TMR_INTERRUPT_SOURCE Macro
C
#define DRV_TMR_INTERRUPT_SOURCE INT_SOURCE_TIMER_1
Description
TMR Interrupt Source
This macro defines the interrupt source of the static driver.
Remarks
Refer to the Interrupt Peripheral Library documentation for more information on the INT_SOURCE enumeration.
5.1.10.7.8.2 DRV_TMR_POWER_STATE Macro
C
#define DRV_TMR_POWER_STATE SYS_MODULE_POWER_IDLE_STOP
Description
TMR power state configuration
This macro controls the power state of the Timer.
Remarks
This feature is not available in all modules/devices. Refer to the specific device data sheet for more information.
5.1.10.7.8.3 DRV_TMR_UNIFIED Macro
C
#define DRV_TMR_UNIFIED false
Description
TMR driver configuration
This definition sts up the driver functionlity in either split or the unified mode.
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Remarks
None.
5.1.10.8 Files
Files
Name Description
drv_tmr.h Timer device driver interface header.
drv_tmr_config_template.h Timer driver configuration definitions for the template version.
Description
5.1.10.8.1 drv_tmr.h
Timer Device Driver Interface Definition
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Timer device driver.
Enumerations
Name Description
DRV_TMR_ALARM_TYPE Timer driver type enumeration.
DRV_TMR_CLIENT_STATUS Identifies the client-specific status of the Timer driver
DRV_TMR_SYNC_MODE Identifies the synchronous modes for the Timer driver.
Functions
Name Description
DRV_TMR_AlarmCountClear Clears the alarm elapse counter.
DRV_TMR_AlarmCountGet Provides the number of times the alarm has elapsed since the last time it
was cleared.
DRV_TMR_AlarmSet Initializes an alarm.
DRV_TMR_ClientStatus Gets current client-specific status of the Timer driver.
DRV_TMR_Close Closes an opened instance of the Timer driver
DRV_TMR_Counter16BitGet Provides the 16-bit Timer's current counter value.
DRV_TMR_Counter16BitSet Updates the 16-bit Timer's initial count value.
DRV_TMR_Counter32BitGet Provides the 32-bit Timer's current counter value.
DRV_TMR_Counter32BitSet Updates the 32-bit Timer's initial count value.
DRV_TMR_Counter8BitGet Provides the 8-bit Timer's current counter value.
DRV_TMR_Counter8BitSet Updates the 8-bit Timer's initial count value
DRV_TMR_Deinitialize Deinitializes the specified instance of the Timer driver.
DRV_TMR_ElapsedStatusGetAndClear Provides and clears the Timer's elapse count.
DRV_TMR_Initialize Initializes the Timer driver .
DRV_TMR_Open Opens the specified Timer driver instance and returns a handle to it.
DRV_TMR_OperatingFrequencyGet Provides the Timer operating frequency.
DRV_TMR_Period16BitGet Provides the 16-bit Timer's period
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DRV_TMR_Period16BitSet Updates the 16-bit Timer's period.
DRV_TMR_Period32BitGet Provides the 32-bit Timer's period
DRV_TMR_Period32BitSet Updates the 32-bit Timer's period.
DRV_TMR_Period8BitGet Provides the 8-bit Timer's period.
DRV_TMR_Period8BitSet Updates the 8-bit timer's period
DRV_TMR_Reinitialize Reinitializes the driver and refreshes any associated hardware settings.
DRV_TMR_Start Starts the Timer counting.
DRV_TMR_Status Provides the current status of the Timer driver.
DRV_TMR_Stop Stops the Timer from counting.
DRV_TMR_SyncModeGet Provides the Timer's current synchronization mode.
DRV_TMR_SyncModeSet Changes the Timer's synchronization mode.
DRV_TMR_Tasks Maintains the driver's state machine and implements its ISR.
DRV_TMR_TickFrequencyGet Provides the Timer's counter "tick" frequency.
DRV_TMR_VersionGet Gets the Timer driver version in numerical format.
DRV_TMR_VersionStrGet Gets the Timer driver version in string format.
Macros
Name Description
DRV_TMR_INDEX_0 Timer driver index definitions
DRV_TMR_INDEX_1 This is macro DRV_TMR_INDEX_1.
DRV_TMR_INDEX_2 This is macro DRV_TMR_INDEX_2.
DRV_TMR_INDEX_3 This is macro DRV_TMR_INDEX_3.
DRV_TMR_INDEX_4 This is macro DRV_TMR_INDEX_4.
DRV_TMR_INDEX_5 This is macro DRV_TMR_INDEX_5.
DRV_TMR_INDEX_COUNT Number of valid Timer driver indices.
Structures
Name Description
DRV_TMR_ALARM_CONFIG Timer module alarm configuration.
DRV_TMR_INIT Defines the Timer driver initialization data.
Types
Name Description
DRV_TMR_CALLBACK Pointer to a Timer driver callback function data type.
File Name
drv_tmr.h
Company
Microchip Technology Inc.
5.1.10.8.2 drv_tmr_config_template.h
Timer Driver Configuration Definitions for the Template Version
These definitions set up the driver for the default mode of operation of the driver.
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Macros
Name Description
DRV_TMR_ALARM_ENABLE Enables alarm functionality.
DRV_TMR_ALARM_PERIODIC Alarm type configuration.
DRV_TMR_ASYNC_WRITE_ENABLE Controls Asynchronous Write mode of the Timer.
DRV_TMR_CLIENTS_NUMBER Selects the maximum number of clients
DRV_TMR_CLOCK_SOURCE Timer module clock source selection.
DRV_TMR_COUNT_WIDTH Controls the mode of the Timer.
DRV_TMR_INDEX Timer static index selection.
DRV_TMR_INSTANCES_NUMBER Sets up the maximum number of hardware instances that can be
supported by the dynamic driver.
DRV_TMR_INTERRUPT_MODE Controls operation of the driver in the interrupt or polled mode.
DRV_TMR_INTERRUPT_SOURCE Defines the interrupt source of the static driver.
DRV_TMR_PERIPHERAL_ID Timer peripheral ID selection.
DRV_TMR_POSTSCALE Macro controls post scale of the TMR
DRV_TMR_POWER_STATE Controls the power state of the Timer.
DRV_TMR_PRESCALE Timer module prescale value.
DRV_TMR_PRESCALER_ENABLE Controls prescaler assignment of the Timer.
DRV_TMR_SOURCE_EDGE Timer module source edge.
DRV_TMR_SYNCHRONIZATION_MODE Controls Synchronization mode of the Timer.
DRV_TMR_TIMER_PERIOD Timer period value for an overflow or a period match-based Timer.
DRV_TMR_UNIFIED Sets up the driver functionlity in either split or the unified mode.
File Name
drv_tmr_config_template.h
Company
Microchip Technology Inc.
5.1.11 USART Driver Library
5.1.11.1 Introduction
USART Driver Library
for
Microchip Microcontrollers
This library provides an interface to manage the USART module on Microchip family of micro controllers in different modes of
operation.
Overview of USART
The Universal Synchronous Asynchronous Receiver/Transmitter (USART) controller is the key component of the serial
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communications subsystem of many embedded systems.
The USART driver can support following modes of operation. (Refer to the Device Specific data sheet to determine which modes
are supported on the part being used.)
1. RS232
RS232 is an asynchronous full duplex serial communication protocol. It uses separate lines for transmitting and receiving data,
point-to-point, between a Data Terminal Equipment (DTE) item and a Data Communication Equipment (DCE) item at a maximum
speed of 20 kbps with a maximum cable length of 50 feet.
2. RS485
RS485 is a multi-point communications network. It provides bi-directional, half-duplex, data transmission that allows multiple
receivers and drivers in "bus" configurations. The standard specifies up to 32 drivers and 32 receivers on a single (2-wire) bus.
With the introduction of "automatic" repeaters and high-impedance drivers and receivers this "limitation" can be extended to
hundreds (or even thousands) of nodes on a network.
3. IrDA
Some Microchip micro controllers provide an Infrared (IR) encoder and decoder and can also interface with external IR encoders
and decoders.
4. Interdevice Communication
USART module can be used for communication(without any external transceiver) between two devices. The maximum
communication speed in this case is
determined by the maximum Baud supported by the device.
5. Synchronous Master/Slave
Synchronous serial transmission requires that the sender and receiver share a clock with one another or that the sender provide
a strobe or other timing signal so that the receiver knows when to latch the next bit of the data. It is typically used in systems with
a single master and one or more slaves. The master device contains the necessary circuitry for baud rate generation and
supplies the clock for all devices in the system.
Note: if a USART does not support a synchronous mode, it is called UART. However, UARTs are still controlled by the USART
driver.
5.1.11.2 Release Notes
MPLAB Harmony Version: v0.70b USART Driver Library Version : 0.050b Alpha Release Date: 18Nov2013
New This Release:
The USART Driver supports the following modes of operation.
Modes of operation
• Polling Mode
• Interrupt Mode
Configuration modes
• Asynchronous Transmit & Receive(i.e. RS232, RS485)
• IrDA Mode
• Loop Back Mode
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Handshake modes
• Flow Control Mode
• No Handshake Mode
Line Control modes
• 8 bit, No Parity, 1 stop bit Mode
• 9 bit, No Parity, 1 stop bit Mode
• 8 bit, Even Parity, 1 stop bit Mode
• 8 bit, Even Parity, 2 stop bits Mode
• 8 bit, Odd Parity, 1 stop bit Mode
• 8 bit, Odd Parity, 2 stop bits Mode
Interrupt Modes
• Wakeup On Start Enable
• Auto Baud enable
Following demo shows how to use USART Driver
• usart_echo (\apps\driver\usart\drv_usart_demo)
Known Issues:
The following are the known issues in this release.
• Although implementation exists, the driver doesn’t work in the following line control modes:
• 8 bit, Even Parity, 1 stop bit Mode
• 8 bit, Even Parity, 2 stop bits Mode
• 8 bit, Odd Parity, 1 stop bit Mode
• 8 bit, Odd Parity, 2 stop bits Mode
• Deinitialize API of the driver doesn’t work. This means that the application cannot initialize the driver after deinitializing it.
• When UART driver is configured for 115200 baud rate, there could be no data received or received data is corrupted
• More than one client is not supported
• The USART Driver does not support “Odd” and “Even” parity settings
5.1.11.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
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paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.11.4 Using the Library
This topic describes the basic architecture of the USART Driver Library and provides information and examples on how to use it.
Interface Header File: drv_usart.h
The interface to the USART library is defined in the "drv_usart.h" header file
Please refer to the MPLAB Harmony Overview for how the driver interacts with the framework.
5.1.11.4.1 Abstraction Model
Different types of USARTs are available on Microchip microcontrollers. Some have a FIFO and some do not. The FIFO depth
varies across part families. The USART driver abstracts out these differences and provides a unified model for data transfer
across different types of USARTS available.
Both transmitter and receiver provide a buffer in the driver which transmits and receives data to/from the hardware. The USART
driver provides a set of interfaces to perform the read and the write.
The diagrams below illustrates the model used by the USART driver for transmitter and receiver.
Receiver Abstraction Model
Transmitter Abstraction Model
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5.1.11.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The table below lists the interface section and its brief description.
Library Interface Section Description
Data Types and Constants Provides macros for configuring the system. It is required that the system
configures the driver to build correctly by choosing appropriate
configuration options as listed in this section.
System Initialization Functions Provides system module interfaces, Device initialization, de-initialization,
re-initialization and status functions.
Setup and Status Functions Provides open, close and other setup functions
Data Transfer Functions Provides data transfer functions available in the core configuration
5.1.11.4.3 How the Library Works
The library provides interfaces to support:
• System Interaction
• Client Core Functionality
5.1.11.4.3.1 System Initialization
System Initialization and Reinitialization
The system performs the initialization and the reinitialization of the device driver with settings that affect only the instance of the
device that is being initialized or re-initialized. During system initialization each instance of the USART device will be initialized
with the following configuration settings (either passed dynamically at run time using DRV_USART_INIT or by using Initialization
Overrides) that are supported by the specific USART device hardware:
• Device requested power state: one of the System Module Power States. For specific details please refer to the Data Types
section in this guide
• The actual peripheral ID enumerated as the PLIB level module ID. e.g USART_ID_2.
• Operation Mode: Select the operation mode of the instance using one of the possible values from
DRV_USART_OPERATION_MODES. Make sure that the operation mode support is enabled in the driver configuration setup.
Also for RS485 operation mode, select the address to which the module instance should respond to.
• Line Control Mode: Setup the line control mode using one of the possible values from
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DRV_USART_LINE_CONTROL_MODES
• Baud Rate Setup: Setup the baud rate by either providing the baud rate value or enabling the auto baud setup.
• Configuration of the RS485 mode if enabled.
• Enabling the handshake signals.e.g. Simplex, FlowControl. For specifics please refer the Data Types section in this guide.
• Defining the respective interrupt sources for Tx, Rx, and Error Interrupt.
The DRV_USART_Initialize API returns an object handle of the type SYS_MODULE_OBJ. There on, the object handle returned
by the Initialize interface would be used by the other system interfaces like DRV_USART_Reinitialize, DRV_USART_Deinitialize,
DRV_USART_Status and DRV_USART_TasksTX, DRV_USART_TasksRX.
Note:The system initialization and the re-initialization settings, only effect the instance of the peripheral that is being initialized or
re-initialized.
Example:
DRV_USART_INIT usartInitData;
//Alternatively NULL can be passed to Initialize which then
//makes sure that static overrides as selected by the user
//will be used as default values
SYS_MODULE_OBJ objectHandle;
usartInitData.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
usartInitData.moduleId = USART_ID_2;
usartInitData.operationMode = DRV_USART_OPERATION_MODE_RS232;
usartInitData.initFlags = 0;
usartInitData.lineControlMode = DRV_USART_LINE_CONTROL_MODE_8NONE1;
usartInitData.brgClock = 4000000;
usartInitData.brgValue = 9600;
usartInitData.operationModeInit = 0;
usartInitData.handShakeMode = DRV_USART_HANDSHAKE_MODE_FLOWCONTROL;
usartInitData.txInterruptSource = INT_SOURCE_USART_2_TRANSMIT;
usartInitData.rxInterruptSource = INT_SOURCE_USART_2_RECEIVE;
usartInitData.errorInterruptSource = INT_SOURCE_USART_2_ERROR;
usartInitData.txQueueSize = 3;
usartInitData.rxQueueSize = 3;
objectHandle = DRV_USART_Initialize(DRV_USART_INDEX_1, (SYS_MODULE_INIT*)usartInitData);
if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
Tasks Routine
The system will either call DRV_USART_TasksTX, DRV_USART_TasksRX, from System Task Service (in a polled environment)
or DRV_USART_TasksTX, DRV_USART_TasksRX will be called from interrupt service routine of the USART.
5.1.11.4.3.2 Core Functionality
Core functionality provides a extremely basic interface for the driver operation.
Core Transmitter Functionality
Application using the USART core functionality, needs to perform the following:
1. The system should have completed necessary initialization and the DRV_USART_TasksTX should either be running in polled
environment, or in an interrupt environment.
2. Open the driver using DRV_USART_Open, timer driver supports exclusive access only.
3. Write a byte using DRV_USART_WriteByte.
4. The client will be able to close itself using the DRV_USART_Close when required.
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Example :
DRV_HANDLE handle; // Returned from DRV_USART_Open
bool status;
// Pre-initialize myBuffer with MY_BUFFER_SIZE bytes of valid data.
status = DRV_USART_WriteByte(handle, myBuffer[numBytes++]);
// Do something else...
}
Core Receiver Functionality
Application using the USART core functionality, needs to perform the following:
1. The system should have completed necessary initialization and the DRV_USART_TasksRX should either be running in polled
environment, or in an interrupt environment.
2. Open the driver using DRV_USART_Open, timer driver supports exclusive access only.
3. Write a byte using DRV_USART_ReadByte.
4. The client will be able to close itself using the DRV_USART_Close when required.
Example :
DRV_HANDLE handle; // Returned from DRV_USART_Open
bool status;
char byte;
bool = DRV_USART_ReadByte(handle, &byte);
// Do something else...
5.1.11.4.3.3 Client Access
For the application to start using an instance of the module, it must call the DRV_USART_Open function. This provides the
configuration required to open the USART instance for operation. If the driver is de-initialized using the function
DRV_USART_Deinitialize, the application must call the DRV_USART_Open function again to setup the instance of the USART.
The function DRV_USART_Open need not be called again if the system is re-initialized using the DRV_USART_Reinitialize
function.
//This i have to mod
For the various options available for I/O INTENT please refer to the Data Types and Constants section.
Example:
DRV_HANDLE handle;
handle = DRV_USART_Open(DRV_USART_INDEX_1, DRV_IOINTENT_READWRITE);// Configure the instance
USART_ID_1 with the above configuration
if(handle == DRV_HANDLE_INVALID)
{
// Client cannot open the instance.
}
5.1.11.4.3.4 Data Transfer
In the basic data transfer mode, the USART device driver allows the client to perform simple read or write operation on the
USART. The client (who is this) has to provide a buffer where the transfer data is/will be stored.
Example : Read in the RS-232 mode
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// USART is operating in RS-232 Mode
// Assume that DRV_USART_Open operation was called with DRV_IO_INTENT_NONBLOCKING parameter
char myBuffer[MY_BUFFER_SIZE];
size_t total;
size_t count;
DRV_HANDLE drvHandle; // device handle obtained by a call to DRV_USART_Open
// Start the transfer
total = 0;
do
{
count = DRV_USART_Read(drvHandle, myBuffer, MY_BUFFER_SIZE - total);
total += count;
// Do something else...
} while(total < MY_BUFFER_SIZE);
Example : Write in the RS-485 mode
// USART is operating in RS-485 Mode
// Assume that DRV_USART_Open operation was called with DRV_IO_INTENT_NONBLOCKING parameter
char myBuffer[MY_BUFFER_SIZE];
size_t total;
size_t count;
DRV_HANDLE drvHandle; // device handle obtained by a call to DRV_USART_Open
// Start the transfer
total = 0;
do
{
count = DRV_USART_WriteToAddress(drvHandle, 0x07, myBuffer, MY_BUFFER_SIZE - total); //
Write the string "writestring" to the communications channel
total += count;
// Do something else...
} while(total < MY_BUFFER_SIZE);
5.1.11.4.3.5 Advanced Data Transfer
USART device client transfer is composed if various buffers that are queued internally by the driver.
Each buffer is described by a buffer descriptor which contains the transfer buffer, size and an address
Each buffer has associated flags that specify the behavior that the device driver has to take once that particular segment
reaches a particular stage of processing.
The client can add segments to the transfer by using DRV_USART_BufferAdd for adding the Read and write buffers.
The client can query the status of the buffer using the function DRV_USART_BufferStatus and also can query how many bytes
of the buffer are read or written if the buffer is in progress using the function DRV_USART_BufferTransferStatus.
The diagram below illustrates the buffer model used by the advanced data transfer.
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Example:
void Callback(void);
uint8_t mybuffer[MY_BUFFER_SIZE];
uint8_t bytesWritten = 0;
DRV_BUFFER_HANDLE bufferHandle = NULL;
DRV_USART_IO_BUFFER buffer1;
void Callback(void)
{
Nop();
}
buffer1.buffer = writeBuffer2;
buffer1.bufferSize = sizeof(writeBuffer2);
buffer1.xferCallback = Callback;
buffer1.flags = DRV_USART_BUFFER_FLAG_WRITE;
// myUSARTHandle is the handle returned by the DRV_USART_Open function.
bufferHandle = DRV_USART_BufferAdd(myUSARThandle, &buffer1);
bufferStatus = DRV_USART_BufferStatus ( uartHandle, uartBufferHandle );
if ( DRV_USART_BUFFER_COMPLETED == bufferStatus )
{
// Handle Buffer Complete
}else
{
// Handle other
}
Example:
void Callback(void);
uint8_t mybuffer[MY_BUFFER_SIZE];
uint8_t bytesWritten = 0;
DRV_BUFFER_HANDLE bufferHandle = NULL;
DRV_USART_IO_BUFFER buffer1;
void Callback(void)
{
Nop();
}
buffer1.buffer = readBuffer2;
buffer1.bufferSize = sizeof(readBuffer2);
buffer1.xferCallback = Callback;
buffer1.flags = DRV_USART_BUFFER_FLAG_READ;
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// myUSARTHandle is the handle returned by the DRV_USART_Open function.
bufferHandle = DRV_USART_BufferAdd(myUSARThandle, &buffer1);
bufferStatus = DRV_USART_BufferStatus ( uartHandle, uartBufferHandle );
if ( DRV_USART_BUFFER_COMPLETED == bufferStatus )
{
// Handle Buffer Complete
}else
{
// Handle other
}
5.1.11.5 Configuring the Library
The configuration of the USART device driver is based on the file sys_config.h
This header file contains the configuration selection for the USART device driver build. Based on the selections made here and
the system setup the USART device driver will support or not selected features. These configuration settings will apply to all
instances of the device driver.
This header can be placed anywhere in the application specific folders and the path of this header needs to be presented to the
include search for a successful build. Refer to the Applications Overview section for more details.
Initialization overrides not supported in this version.
5.1.11.6 Building the Library
This section list the files that are available in the \src of the timer driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.1.11.7 Library Interface
Data Types and Constants
Name Description
DRV_USART_AUTO_BAUD_ENABLE Macro configures enabling the auto baud.
DRV_USART_BAUD_RATE Macro controls operation of the driver for Baud rate configuration
DRV_USART_BYTE_Q_SIZE_RX Macro controls operation of the driver for defining the size of the
Rx buffer
DRV_USART_BYTE_Q_SIZE_TX Macro controls operation of the driver for defining the size of the
Tx buffer
DRV_USART_CLIENTS_NUMBER Sets up the maximum number of clients that can be connected to
any hardware instance.
DRV_USART_HANDSHAKE_MODE Configures the handshake mode
DRV_USART_INDEX USART Static Index selection
DRV_USART_INDEX_0 USART driver index definitions
DRV_USART_INDEX_1 This is macro DRV_USART_INDEX_1.
DRV_USART_INDEX_2 This is macro DRV_USART_INDEX_2.
DRV_USART_INDEX_3 This is macro DRV_USART_INDEX_3.
DRV_USART_INDEX_4 This is macro DRV_USART_INDEX_4.
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DRV_USART_INDEX_5 This is macro DRV_USART_INDEX_5.
DRV_USART_INDEX_COUNT Number of valid USART driver indices
DRV_USART_INSTANCES_NUMBER Sets up the maximum number of hardware instances that can be
supported
DRV_USART_INTERRUPT_MODE Macro controls operation of the driver in the interrupt mode
DRV_USART_INTERRUPT_SOURCE_ERROR Defines the interrupt source for the error interrupt
DRV_USART_INTERRUPT_SOURCE_RX Macro to define the Rx interrupt source in case of static driver
DRV_USART_INTERRUPT_SOURCE_TX Macro to define the Tx interrupt source in case of static driver
DRV_USART_LINE_CONTROL Macro defines the line control mode
DRV_USART_OPERATION_MODE Defines the mode to be used for the USART driver
DRV_USART_PERIPHERAL_ID Configures the PLIB id
DRV_USART_POLARITY_INVERTED_RX Defines the polarity of the RX pin.
DRV_USART_POLARITY_INVERTED_TX Defines the polarity of the TX pin.
DRV_USART_POWER_STATE Macro controls power state of the USART
DRV_USART_WAKE_ON_START_ENABLE Macro configures that the peripheral should wake up on start
DRV_USART_XFER_BUFFER_NUMBER Transfer buffer depth
DRV_USART_BUFFER_FLAGS Defines the IO types that can be serviced by the USART driver
DRV_USART_BUFFER_STATUS Defines the buffer status
DRV_USART_CALLBACK Pointer to a USART callback function
DRV_USART_CLIENT_STATUS Defines the client status
DRV_USART_HANDSHAKE_MODES Identifies the handshaking modes available on the USART
DRV_USART_INIT Defines the data required to initialize or reinitialize the USART
driver
DRV_USART_INIT_FLAGS Defines specific initialization features
DRV_USART_IO_BUFFER IO buffer information structure
DRV_USART_LINE_CONTROL_MODES Identifies the line control modes available
DRV_USART_OPERATION_MODE_INIT Defines the initialization data required for different operation
modes of USART
DRV_USART_OPERATION_MODES Identifies the modes of the operation of the USART module
DRV_USART_TRANSFER_STATUS Specifies the status of the receive or transmit
DRV_USART_XFER_HANDLE Handle for requested transfer..
Data Transfer Functions
Name Description
DRV_USART_BufferAdd Starts the writes to the communication channel.
DRV_USART_BufferStatus Provides the status of the given buffer
DRV_USART_Read Reads data from the USART
DRV_USART_ReadByte Reads a byte of data from the USART
DRV_USART_TransferStatus Returns the transmitter and receiver transfer status
DRV_USART_Write Writes data to the USART
DRV_USART_WriteByte Writes a byte of data to the USART
Setup and Status Functions
Name Description
DRV_USART_BufferTransferStatus Gets the number of bytes which are written or read
DRV_USART_ClientStatus Gets current client-specific status the USART driver
DRV_USART_Close Closes an opened-instance of the USART driver
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DRV_USART_Open Opens the specified timer driver instance and returns a handle to it
DRV_USART_Status Gets the current status of the USART driver module.
System Initialization Functions
Name Description
DRV_USART_Deinitialize Deinitializes the specified instance of the USART driver module
DRV_USART_Initialize Initializes the USART instance for the specified driver index
DRV_USART_Reinitialize Reinitializes the USART driver and refreshes any associated hardware settings
DRV_USART_TasksError Maintains the driver's error-handling state machine and implements its ISR
DRV_USART_TasksRX Maintains the driver's receiver state machine and implements its ISR
DRV_USART_TasksTX Maintains the driver's tramsmitter state machine and implements its ISR
Description
This section describes the functions of the USART Driver Library.
Refer to each section for a detailed description.
5.1.11.7.1 System Initialization Functions
5.1.11.7.1.1 DRV_USART_Deinitialize Function
C
void DRV_USART_Deinitialize(
SYS_MODULE_OBJ object
);
Description
Deinitializes the specified instance of the USART driver module, disabling its operation (and any hardware). Invalidates all the
internal data.
Preconditions
Function DRV_USART_Initialize should have been called before calling this function.
Parameters
Parameters Description
object Driver object handle, returned from the DRV_USART_Initialize routine
Returns
None.
Remarks
Once the Initialize operation has been called, the Deinitialize operation must be called before the Initialize operation can be
called again.
This routine will NEVER block waiting for hardware. If the operation requires time to allow the hardware to complete, this will be
reported by the DRV_USART_Status operation. The system has to use DRV_USART_Status to find out when the module is in
the ready state.
Example
SYS_MODULE_OBJ object; // Returned from DRV_USART_Initialize
SYS_STATUS status;
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DRV_USART_Deinitialize(object);
status = DRV_USART_Status(object);
if (SYS_MODULE_DEINITIALIZED != status)
{
// Check again later if you need to know
// when the driver is deinitialized.
}
5.1.11.7.1.2 DRV_USART_Initialize Function
C
SYS_MODULE_OBJ DRV_USART_Initialize(
const SYS_MODULE_INDEX index,
const SYS_MODULE_INIT * const init
);
Description
This routine initializes the USART driver instance for the specified driver index, making it ready for clients to open and use it.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the instance to be initialized
init Pointer to a data structure containing any data necessary to initialize the drivver.
This pointer may be null if no data is required because static overrides have been
provided.
Returns
If successful, returns a valid handle to a driver instance object. Otherwise, it returns SYS_MODULE_OBJ_INVALID.
Remarks
This routine must be called before any other USART routine is called.
This routine should only be called once during system initialization unless DRV_USART_Deinitialize is called to de-initialize the
driver instance.
This routine will NEVER block for hardware access. If the operation requires time to allow the hardware to re-initialize, it will be
reported by the DRV_USART_Status operation. The system must use DRV_USART_Status to find out when the driver is in the
ready state.
Build configuration options may be used to staticaly override options in the "init" sructure and will take precedance over
initialization data passed using this routine.
Example
DRV_USART_INIT usartInitData;
//Alternatively NULL can be passed to Initialize which then
//makes sure that static overrides as selected by the user
//will be used as default values
SYS_MODULE_OBJ objectHandle;
usartInitData.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
usartInitData.moduleId = USART_ID_2;
usartInitData.operationMode = DRV_USART_OPERATION_MODE_RS232;
usartInitData.initFlags = 0;
usartInitData.lineControlMode = DRV_USART_LINE_CONTROL_MODE_8NONE1;
usartInitData.brgClock = 4000000;
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usartInitData.brgValue = 9600;
usartInitData.operationModeInit = 0;
usartInitData.handShakeMode = DRV_USART_HANDSHAKE_MODE_FLOWCONTROL;
usartInitData.txInterruptSource = INT_SOURCE_USART_2_TRANSMIT;
usartInitData.rxInterruptSource = INT_SOURCE_USART_2_RECEIVE;
usartInitData.errorInterruptSource = INT_SOURCE_USART_2_ERROR;
usartInitData.txQueueSize = 3;
usartInitData.rxQueueSize = 3;
objectHandle = DRV_USART_Initialize(DRV_USART_INDEX_1, (SYS_MODULE_INIT*)usartInitData);
if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
5.1.11.7.1.3 DRV_USART_Reinitialize Function
C
void DRV_USART_Reinitialize(
SYS_MODULE_OBJ object,
const SYS_MODULE_INIT * const init
);
Description
This routine reinitializes the driver and refreshes any associated hardware settings using the initialization data given, but it will
not interrupt any ongoing operations.
Preconditions
Function DRV_USART_Initialize must have been called before calling this routine and a valid SYS_MODULE_OBJ must have
been returned.
Parameters
Parameters Description
object Driver object handle, returned from the DRV_USART_Initialize routine
init Pointer to the initialization data structure
Returns
None.
Remarks
This function can be called multiple times to reinitialize the module.
This operation can be used to refresh any supported hardware registers as specified by the initialization data or to change the
power state of the module.
This routine will NEVER block for hardware access. If the operation requires time to allow the hardware to re-initialize, it will be
reported by the DRV_USART_Status operation. The system must use DRV_USART_Status to find out when the driver is in the
ready state.
Build configuration options may be used to staticaly override options in the "init" sructure and will take precedance over
initialization data passed using this routine.
Example
DRV_USART_INIT usartInitData;
//Alternatively NULL can be passed to Initialize which then
//makes sure that static overrides as selected by the user
//will be used as default values
SYS_STATUS usartStatus;
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SYS_MODULE_OBJ object;
usartInitData.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
usartInitData.moduleId = USART_ID_2;
usartInitData.operationMode = DRV_USART_OPERATION_MODE_RS232;
usartInitData.initFlags = 0;
usartInitData.lineControlMode = DRV_USART_LINE_CONTROL_MODE_8NONE1;
usartInitData.brgClock = 4000000;
usartInitData.brgValue = 9600;
usartInitData.operationModeInit = 0;
usartInitData.handShakeMode = DRV_USART_HANDSHAKE_MODE_FLOWCONTROL;
usartInitData.txInterruptSource = INT_SOURCE_USART_2_TRANSMIT;
usartInitData.rxInterruptSource = INT_SOURCE_USART_2_RECEIVE;
usartInitData.errorInterruptSource = INT_SOURCE_USART_2_ERROR;
DRV_USART_Reinitialize(object, (SYS_MODULE_INIT*)usartInitData);
usartStatus = DRV_USART_Status(object);
if (SYS_STATUS_BUSY == usartStatus)
{
// Check again later to ensure the driver is ready
}
else if (SYS_STATUS_ERROR >= usartStatus)
{
// Handle error
}
5.1.11.7.1.4 DRV_USART_TasksError Function
C
void DRV_USART_TasksError(
SYS_MODULE_OBJ object
);
Description
This routine is used to maintain the driver's internal error-handling state machine and implement its ISR for interrupt-driven
implementations.
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART driver instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from
DRV_USART_Initialize)
Returns
None.
Remarks
This routine is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
apropriate raw ISR.
This routine may excute in an ISR context and will never block or access any resources that may cause it to block.
Example
SYS_MODULE_OBJ object; // Returned from DRV_USART_Initialize
while (true)
{
DRV_USART_TasksError (object);
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// Do other tasks
}
5.1.11.7.1.5 DRV_USART_TasksRX Function
C
void DRV_USART_TasksRX(
SYS_MODULE_OBJ object
);
Description
This routine is used to maintain the driver's internal receiver state machine and implement its ISR for interrupt-driven
implementations.
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART driver instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from
DRV_USART_Initialize)
Returns
None.
Remarks
This routine is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
apropriate raw ISR.
This routine may excute in an ISR context and will never block or access any resources that may cause it to block.
Example
SYS_MODULE_OBJ object; // Returned from DRV_USART_Initialize
while (true)
{
DRV_USART_TasksRX (object);
// Do other tasks
}
5.1.11.7.1.6 DRV_USART_TasksTX Function
C
void DRV_USART_TasksTX(
SYS_MODULE_OBJ object
);
Description
This routine is used to maintain the driver's internal transmitter state machine and implement its ISR for interrupt-driven
implementations.
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART driver instance.
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Parameters
Parameters Description
object Object handle for the specified driver instance (returned from
DRV_USART_Initialize)
Returns
None.
Remarks
This routine is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
apropriate raw ISR.
This routine may excute in an ISR context and will never block or access any resources that may cause it to block.
Example
SYS_MODULE_OBJ object; // Returned from DRV_USART_Initialize
while (true)
{
DRV_USART_TasksTX (object);
// Do other tasks
}
5.1.11.7.2 Data Transfer Functions
5.1.11.7.2.1 DRV_USART_BufferAdd Function
C
DRV_HANDLE DRV_USART_BufferAdd(
const DRV_HANDLE handle,
DRV_USART_IO_BUFFER * bufferObject
);
Description
Starts the writes to the communication channel.
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART device instance and the
DRV_USART_Status must have returned SYS_STATUS_READY.
DRV_USART_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_READ or DRV_IO_INTENT_WRITE or DRV_IO_INTENT_READWRITE must have been specified in the
DRV_USART_Open call.
Parameters
Parameters Description
handle Handle of the communication channel as return by the DRV_USART_Open
function.
bufferObject Buffer Object that needs to be specified for the buffer that needs to be read or
written.
Returns
The buffer handle, which should be used to query how many bytes have been written or read using the function
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DRV_USART_OperationStatus
Remarks
If the DRV_IO_INTENT_BLOCKING is requested and the driver was built appropriately to support blocking behavior in an OS
environment the call will block until the operation is complete.
For DRV_IO_INTENT_NONBLOCKING request the driver client can call the DRV_USART_ClientStatus operation to find out
when the module is in the ready state.
In any circumstance, the client supplied buffer has to be non-volatile and it is not allowed to go out of scope until the operation
completes.
Affected by the following configuration options:
• DRV_USART_CONFIG_SUPPORT_CLIENT_ACCESS_BLOCKING
• DRV_USART_CONFIG_BUFFER_QUEUE_SLOTS_MAX
• DRV_USART_CONFIG_SUPPORT_BUFFERQ
Example
void Callback(void);
uint8_t mybuffer[MY_BUFFER_SIZE];
int8_t bytesWritten = 0;
DRV_BUFFER_HANDLE bufferHandle = NULL;
DRV_USART_IO_BUFFER buffer1;
void Callback(void)
{
Nop();
}
buffer1.buffer = writeBuffer2;
buffer1.bufferSize = sizeof(writeBuffer2);
buffer1.xferCallback = Callback;
buffer1.flags = DRV_USART_BUFFER_FLAG_WRITE;
// myUSARTHandle is the handle returned by the DRV_USART_Open function.
bufferHandle = DRV_USART_BufferAdd(myUSARThandle, &buffer1);
while(bytesWritten < MY_BUFFER_SIZE)
{
bytesWritten = DRV_USART_BufferTransferStatus(handle, bufferHandle);
}
5.1.11.7.2.2 DRV_USART_BufferStatus Function
C
DRV_USART_BUFFER_STATUS DRV_USART_BufferStatus(
DRV_HANDLE handle,
const DRV_HANDLE bufferHandle
);
Description
This function provides the current status of the buffer identified by the given buffer handle.
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART device instance and the
DRV_USART_Status must have returned SYS_STATUS_READY.
DRV_USART_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_READ or DRV_IO_INTENT_WRITE or DRV_IO_INTENT_READWRITE must have been specified in the
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DRV_USART_Open call.
The "bufferHandle parameter must be the return value from a call to the "DRV_USART_BufferAdd" function.
Parameters
Parameters Description
handle Handle of the communication channel as return by the DRV_USART_Open
function.
bufferHandle Handle to the buffer in question. Must be the return value from a call to the
"DRV_USART_BufferAdd" function.
Returns
The current status of the given buffer.
Remarks
See the definition of "DRV_USART_BUFFER_STATUS" for a complete description of all possible status values.
Example
DRV_USART_BUFFER_STATUS bufferStatus;
bufferStatus = DRV_USART_BufferStatus ( uartHandle, uartBufferHandle );
if ( DRV_USART_BUFFER_COMPLETED == bufferStatus )
{
// Handle Buffer Complete
}else
{
// Handle other
}
5.1.11.7.2.3 DRV_USART_Read Function
C
int DRV_USART_Read(
const DRV_HANDLE handle,
uint8_t * buffer,
const unsigned int numbytes
);
Description
This routine reads data from the USART.
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART driver instance.
DRV_USART_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_READ or DRV_IO_INTENT_READWRITE must have been specified in the DRV_USART_Open call.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
buffer Buffer into which the data read from the USART instance will be placed.
numbytes Total number of bytes that need to be read from the module instance (must be
equal to or less than the size of the buffer)
Returns
Number of bytes actually copied into the caller's buffer or -1 if there is an error (call DRV_USART_ClientStatus to identify the
error).
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Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_USART_Open routine and the driver was built to
support blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_USART_Open routine or the driver was built to
only support non-blocking behavior the call will return immediately, identifying how many bytes of data were actually copied into
the client's buffer and the client must call DRV_USART_Read again with adjusted parameters as shown in the example.
Example
DRV_HANDLE handle; // Returned from DRV_USART_Open
char myBuffer[MY_BUFFER_SIZE];
unsigned int count;
unsigned int total;
total = 0;
do
{
count = DRV_USART_Read(myUSARTHandle, &myBuffer[total], MY_BUFFER_SIZE - total);
total += count;
// Do something else...
} while( total < MY_BUFFER_SIZE );
5.1.11.7.2.4 DRV_USART_ReadByte Function
C
bool DRV_USART_ReadByte(
const DRV_HANDLE handle,
char * byte
);
Description
This routine reads a byte of data from the USART.
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART driver instance.
DRV_USART_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_READ or DRV_IO_INTENT_READWRITE must have been specified in the DRV_USART_Open call.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
byte A variable in which data is read into
Returns
true - Read successful false - Read failed
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_USART_Open routine and the driver was built to
support blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_USART_Open routine or the driver was built to
only support non-blocking behavior the call will return immediately. If data is not available, a zero (0) value will be returned and
an underrun error status will be captured. To ensure that valid data is returned, the caller must first check the return value to
DRV_USART_TransferStatus as shown in the example.
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Example
DRV_HANDLE handle; // Returned from DRV_USART_Open
bool status;
char byte;
bool = DRV_USART_ReadByte(handle, &byte);
// Do something else...
5.1.11.7.2.5 DRV_USART_TransferStatus Function
C
DRV_USART_TRANSFER_STATUS DRV_USART_TransferStatus(
const DRV_HANDLE handle
);
Description
This returns the transmitter and receiver transfer status.
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART driver instance.
DRV_USART_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
A DRV_USART_TRANSFER_STATUS value describing the current status of the transfer.
Remarks
The returned status may contain a value with more than one of the bits specified in the DRV_USART_TRANSFER_STATUS
enumeration set. The caller should perform an "AND" with the bit of interest and verify if the result is non-zero (as shown in the
example) to verify the desired status bit.
Example
DRV_HANDLE handle; // Returned from DRV_USART_Open
if (DRV_USART_TRANSFER_STATUS_TX_EMPTY & DRV_USART_TransferStatus(handle) )
{
// All transmitter data has been sent.
}
5.1.11.7.2.6 DRV_USART_Write Function
C
bool DRV_USART_Write(
const DRV_HANDLE handle,
const uint8_t * buffer,
const uint32_t numbytes
);
Description
This routine writes data to the USART.
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Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART driver instance.
DRV_USART_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_WRITE or DRV_IO_INTENT_READWRITE must have been specified in the DRV_USART_Open call.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
buffer Buffer containing the data write to the USART instance
numbytes Total number of bytes that to write to the USART instance (must be equal to or
less than the size of the buffer)
Returns
Number of bytes actually written to the USART or -1 if there is an error (call DRV_USART_ClientStatus to identify the error)
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_USART_Open routine and the driver was built to
support blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_USART_Open routine or the driver was built to
only support non-blocking behavior the call will return immediately, identifying how many bytes of data were actually written to
the USART and the client must call DRV_USART_Write again with adjusted parameters as shown in the example.
Example
DRV_HANDLE handle; // Returned from DRV_USART_Open
char myBuffer[MY_BUFFER_SIZE];
unsigned int count;
unsigned int total;
total = 0;
do
{
count = DRV_USART_Write(myUSARTHandle, &myBuffer[total], MY_BUFFER_SIZE - total);
total += count;
// Do something else...
} while( total < MY_BUFFER_SIZE );
5.1.11.7.2.7 DRV_USART_WriteByte Function
C
bool DRV_USART_WriteByte(
const DRV_HANDLE handle,
const uint8_t byte
);
Description
This routine writes a byte of data to the USART.
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART driver instance.
DRV_USART_Open must have been called to obtain a valid opened device handle.
DRV_IO_INTENT_WRITE or DRV_IO_INTENT_READWRITE must have been specified in the DRV_USART_Open call.
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Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
byte Data byte to write to the USART
Returns
true - Write successful. false - Write failed.
Remarks
If the DRV_IO_INTENT_BLOCKING flag was given in the call to the DRV_USART_Open routine and the driver was built to
support blocking behavior the call will block until the operation is complete.
If the DRV_IO_INTENT_NONBLOCKING flag was given in the call to the DRV_USART_Open routine or the driver was built to
only support non-blocking behavior the call will return immediately. If the driver was not able to accept the data, an overrun error
status will be captured. To ensure that the driver is ready to accept data, the caller must first check the return value to
DRV_USART_TransferStatus as shown in the example.
Example
DRV_HANDLE handle; // Returned from DRV_USART_Open
bool status;
// Pre-initialize myBuffer with MY_BUFFER_SIZE bytes of valid data.
status = DRV_USART_WriteByte(handle, myBuffer[numBytes++]);
// Do something else...
}
5.1.11.7.3 Setup and Status Functions
5.1.11.7.3.1 DRV_USART_BufferTransferStatus Function
C
int8_t DRV_USART_BufferTransferStatus(
const DRV_HANDLE handle,
const DRV_HANDLE bufferHandle
);
Description
Gets the number of bytes which are written or read for the transaction handle
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART device instance and the
DRV_USART_Status must have returned SYS_STATUS_READY.
DRV_USART_Open must have been called to obtain a valid opened device handle.
The function DRV_USART_BufferAdd should be called before calling this function and should have returned a valid buffer
handle.
Parameters
Parameters Description
handle Handle of the communication channel as return by the DRV_USART_Open
function.
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bufferHandle Handle of the buffer returned by the DRV_USART_BufferAdd
Returns
The number of bytes read if the buffer id is DRV_IO_BUFFER_READ or number of bytes written when the buffer id is
DRV_IO_BUFFER_WRITE. If -1 is returned
Remarks
None.
Example
void Callback(void);
uint8_t mybuffer[MY_BUFFER_SIZE];
int8_t bytesWritten = 0;
DRV_BUFFER_HANDLE bufferHandle = NULL;
DRV_USART_IO_BUFFER buffer1;
void Callback(void)
{
Nop();
}
buffer1.buffer = writeBuffer2;
buffer1.bufferSize = sizeof(writeBuffer2);
buffer1.xferCallback = Callback;
buffer1.flags = DRV_USART_BUFFER_FLAG_WRITE;
// myUSARTHandle is the handle returned by the DRV_USART_Open function.
bufferHandle = DRV_USART_BufferAdd(myUSARThandle, &buffer1);
while(bytesWritten < MY_BUFFER_SIZE)
{
bytesWritten = DRV_USART_BufferTransferStatus(handle, bufferHandle);
}
5.1.11.7.3.2 DRV_USART_ClientStatus Function
C
DRV_USART_CLIENT_STATUS DRV_USART_ClientStatus(
const DRV_HANDLE handle
);
Description
This routine gets the client-specfic status of the USART driver associated with the given handle.
Preconditions
The DRV_USART_Initialize routine must have been called.
DRV_USART_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
A DRV_USART_CLIENT_STATUS value describing the current status of the driver
Remarks
This routine will not block for hardware access and will immediately return the current status.
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Example
DRV_HANDLE handle; // Returned from DRV_USART_Open
DRV_USART_CLIENT_STATUS clientStatus;
clientStatus = DRV_USART_ClientStatus(handle);
if(DRV_USART_CLIENT_STATUS_ERROR >= clientStatus)
{
// Handle the error
}
5.1.11.7.3.3 DRV_USART_Close Function
C
void DRV_USART_Close(
const DRV_HANDLE handle
);
Description
This routine closes an opened-instance of the USART driver, invalidating the handle.
Preconditions
The DRV_USART_Initialize routine must have been called for the specified USART driver instance.
DRV_USART_Open must have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the driver's open routine
Returns
None
Remarks
After calling this routine, the handle passed in "handle" must not be used with any of the remaining driver routines. A new handle
must be obtained by calling DRV_USART_Open before the caller may use the driver again.
If DRV_IO_INTENT_BLOCKING was requested and the driver was built appropriately to support blocking behavior call may
block until the operation is complete.
If DRV_IO_INTENT_NON_BLOCKING request the driver client can call the DRV_USART_Status operation to find out when the
module is in the ready state (the handle is no longer valid).
Usually there is no need for the driver client to verify that the Close operation has completed.
Example
DRV_HANDLE handle; // Returned from DRV_USART_Open
DRV_USART_Close(handle);
5.1.11.7.3.4 DRV_USART_Open Function
C
DRV_HANDLE DRV_USART_Open(
const SYS_MODULE_INDEX index,
const DRV_IO_INTENT ioIntent
);
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Description
This routine opens the specified USART driver instance and provides a handle that must be provided to all other client-level
operations to identify the caller and the instance of the driver.
Preconditions
Function DRV_USART_Initialize must have been called before calling this function.
Parameters
Parameters Description
drvIndex Identifier for the object instance to be opened
intent Zero or more of the values from the enumeration DRV_IO_INTENT "or'd" together
to indicate the intended use of the driver
Returns
If successful, the routine returns a valid open-instance handle (a number identifying both the caller and the module instance).
If an error occurs, the return value is DRV_HANDLE_INVALID.
Remarks
The handle returned is valid until the DRV_USART_Close routine is called.
This routine will NEVER block waiting for hardware.
If the DRV_IO_INTENT_BLOCKING is requested and the driver was built appropriately to support blocking behavior, then other
client-level operations may block waiting on hardware until they are complete.
If DRV_IO_INTENT_NON_BLOCKING is requested the driver client can call the DRV_USART_ClientStatus operation to find out
when the module is in the ready state.
If the requested intent flags are not supported, the routine will return DRV_HANDLE_INVALID.
Example
DRV_HANDLE handle;
handle = DRV_USART_Open(DRV_USART_INDEX_0, DRV_IO_INTENT_EXCLUSIVE);
if (DRV_HANDLE_INVALID == handle)
{
// Unable to open the driver
}
5.1.11.7.3.5 DRV_USART_Status Function
C
SYS_STATUS DRV_USART_Status(
SYS_MODULE_OBJ object
);
Description
This routine provides the current status of the USART driver module.
Preconditions
Function DRV_USART_Initialize should have been called before calling this function.
Parameters
Parameters Description
object Driver object handle, returned from the DRV_USART_Initialize routine
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Returns
SYS_STATUS_READY - Indicates that the driver is busy with a previous system level operation and cannot start another
Note Any value greater than SYS_STATUS_READY is also a normal running state in which the driver is ready to accept new
operations.
SYS_STATUS_BUSY - Indicates that the driver is busy with a previous system level operation and cannot start another
SYS_STATUS_ERROR - Indicates that the driver is in an error state
Remarks
Any value less than SYS_STATUS_ERROR is also an error state.
SYS_MODULE_DEINITIALIZED - Indicates that the driver has been de-initialized
This value is less than SYS_STATUS_ERROR
The this operation can be used to determine when any of the driver's module level operations has completed.
If the status operation returns SYS_STATUS_BUSY, the a previous operation has not yet completed. Once the status operation
returns SYS_STATUS_READY, any previous operations have completed.
The value of SYS_STATUS_ERROR is negative (-1). Any value less than that is also an error state.
This routine will NEVER block waiting for hardware.
If the Status operation returns an error value, the error may be cleared by calling the reinitialize operation. If that fails, the
deinitialize operation will need to be called, followed by the initialize operation to return to normal operations.
Example
SYS_MODULE_OBJ object; // Returned from DRV_USART_Initialize
SYS_STATUS usartStatus;
usartStatus = DRV_USART _Status(object);
else if (SYS_STATUS_ERROR >= usartStatus)
{
// Handle error
}
5.1.11.7.4 Data Types and Constants
5.1.11.7.4.1 DRV_USART_AUTO_BAUD_ENABLE Macro
C
#define DRV_USART_AUTO_BAUD_ENABLE true
Description
Auto Baud enable
This macro configures enabling the auto baud. This is a static override of initialization parameter. This is the static override of the
dynamic intialization passed using DRV_USART_INIT. The possible values it can take:
• true - Enables Auto Baud
• false - Disable Auto Baud
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5.1.11.7.4.2 DRV_USART_BAUD_RATE Macro
C
#define DRV_USART_BAUD_RATE
Description
USART Baud Rate configuration
This macro controls the operation of the driver for Baud rate configuration. This is the static override of the dynamic intialization
passed using DRV_USART_INIT.
5.1.11.7.4.3 DRV_USART_BYTE_Q_SIZE_RX Macro
C
#define DRV_USART_BYTE_Q_SIZE_RX 16
Description
USART Byte mode internal buffer Rx size configuration
This macro controls the operation of the driver for defining the size of the Rx buffer
5.1.11.7.4.4 DRV_USART_BYTE_Q_SIZE_TX Macro
C
#define DRV_USART_BYTE_Q_SIZE_TX 16
Description
USART Byte mode internal buffer Tx size configuration
This macro controls the operation of the driver for defining the size of the Tx buffer
5.1.11.7.4.5 DRV_USART_CLIENTS_NUMBER Macro
C
#define DRV_USART_CLIENTS_NUMBER 2
Description
USART Client Count Configuration
Sets up the maximum number of clients that can be connected to any hardware instance.
Remarks
None
5.1.11.7.4.6 DRV_USART_HANDSHAKE_MODE Macro
C
#define DRV_USART_HANDSHAKE_MODE
Description
Hand Shake Mode
This macro configures the handshake mode. This is the static override of the dynamic intialization passed using
DRV_USART_INIT. The possible values that it can take are
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• DRV_USART_HANDSHAKE_MODE_FLOWCONTROL
• DRV_USART_HANDSHAKE_MODE_SIMPLEX
• DRV_USART_HANDSHAKE_MODE_NONE
5.1.11.7.4.7 DRV_USART_INDEX Macro
C
#define DRV_USART_INDEX DRV_USART_INDEX_2
Description
Index - Used for static drivers
USART Static Index selection for the driver object reference
Remarks
This index is required to make a reference to the driver object
5.1.11.7.4.8 DRV_USART_INDEX_0 Macro
C
#define DRV_USART_INDEX_0 0
Description
Driver USART Module Index reference
These constants provide timer driver index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals.
These values should be passed into the DRV_USART_Initialize and DRV_USART_Open routines to identify the driver instance
in use.
5.1.11.7.4.9 DRV_USART_INDEX_1 Macro
C
#define DRV_USART_INDEX_1 1
Description
This is macro DRV_USART_INDEX_1.
5.1.11.7.4.10 DRV_USART_INDEX_2 Macro
C
#define DRV_USART_INDEX_2 2
Description
This is macro DRV_USART_INDEX_2.
5.1.11.7.4.11 DRV_USART_INDEX_3 Macro
C
#define DRV_USART_INDEX_3 3
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Description
This is macro DRV_USART_INDEX_3.
5.1.11.7.4.12 DRV_USART_INDEX_4 Macro
C
#define DRV_USART_INDEX_4 4
Description
This is macro DRV_USART_INDEX_4.
5.1.11.7.4.13 DRV_USART_INDEX_5 Macro
C
#define DRV_USART_INDEX_5 5
Description
This is macro DRV_USART_INDEX_5.
5.1.11.7.4.14 DRV_USART_INDEX_COUNT Macro
C
#define DRV_USART_INDEX_COUNT USART_NUMBER_OF_MODULES
Description
USART Driver Module Index Count
This constant identifies USART driver index definitions.
Remarks
This constant should be used in place of hard-coded numeric literals.
This value is part-specific.
5.1.11.7.4.15 DRV_USART_INSTANCES_NUMBER Macro
C
#define DRV_USART_INSTANCES_NUMBER 2
Description
USART driver objects configuration
Sets up the maximum number of hardware instances that can be supported
Remarks
None
5.1.11.7.4.16 DRV_USART_INTERRUPT_MODE Macro
C
#define DRV_USART_INTERRUPT_MODE
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Description
USART Interrupt Mode Operation Control
This macro controls the operation of the driver in the interrupt mode of operation.The possible values it can take are
• true - Enables the interrupt mode
• false - Enables the polling mode
5.1.11.7.4.17 DRV_USART_INTERRUPT_SOURCE_ERROR Macro
C
#define DRV_USART_INTERRUPT_SOURCE_ERROR INT_SOURCE_USART_2_ERROR
Description
Error Interrupt Source
This macro defines the interrupt source for the error interrupt. This is the static override of the dynamic intialization passed using
DRV_USART_INIT.
5.1.11.7.4.18 DRV_USART_INTERRUPT_SOURCE_RX Macro
C
#define DRV_USART_INTERRUPT_SOURCE_RX INT_SOURCE_USART_2_RECEIVE
Description
RX Interrupt Source
Macro to define the Rx interrupt source in case of static driver
Remarks
Refer to the INT PLIB document for more information on INT_SOURCE enumeration
5.1.11.7.4.19 DRV_USART_INTERRUPT_SOURCE_TX Macro
C
#define DRV_USART_INTERRUPT_SOURCE_TX INT_SOURCE_USART_2_TRANSMIT
Description
TX Interrupt Source
Macro to define the Tx interrupt source in case of static driver
Remarks
Refer to the INT PLIB document for more information on PLIB_INT_SOURCE enumeration
5.1.11.7.4.20 DRV_USART_LINE_CONTROL Macro
C
#define DRV_USART_LINE_CONTROL DRV_USART_LINE_CONTROL_8N1
Description
Line Control Mode
This macro defines the line control mode as 8 data bits, even parity and 1 stop bit. It provides a static override of the initialization
configuration of the line control mode. The possible values it can take are:
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• DRV_USART_LINE_CONTROL_8E1
• DRV_USART_LINE_CONTROL_8E2
• DRV_USART_LINE_CONTROL_8O1
• DRV_USART_LINE_CONTROL_8O2
• DRV_USART_LINE_CONTROL_8N1
• DRV_USART_LINE_CONTROL_8N2
• DRV_USART_LINE_CONTROL_9N1
5.1.11.7.4.21 DRV_USART_OPERATION_MODE Macro
C
#define DRV_USART_OPERATION_MODE DRV_USART_OPERATION_MODE_RS232
Description
USART mode
This macro controls support modes of the USART driver . The possible values it can take are:
• DRV_USART_OPERATION_MODE_IRDA
• DRV_USART_OPERATION_MODE_RS232
• DRV_USART_OPERATION_MODE_RS485
• DRV_USART_OPERATION_MODE_SYNC_MASTER
• DRV_USART_OPERATION_MODE_SYNC_SLAVE
• DRV_USART_OPERATION_MODE_LOOPBACK
Remarks
None
5.1.11.7.4.22 DRV_USART_PERIPHERAL_ID Macro
C
#define DRV_USART_PERIPHERAL_ID
Description
Plib id
This macro configures the PLIB Id for the driver. This is the static override of the dynamic intialization passed using
DRV_USART_INIT.
5.1.11.7.4.23 DRV_USART_POLARITY_INVERTED_RX Macro
C
#define DRV_USART_POLARITY_INVERTED_RX true
Description
USART RX Polarity Mode.
This macro defines the polarity of the RX pin. The possible values it can take are
• true - polarity is inverted
• false - polarity is not inverted
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Remarks
None.
5.1.11.7.4.24 DRV_USART_POLARITY_INVERTED_TX Macro
C
#define DRV_USART_POLARITY_INVERTED_TX true
Description
USART TX Polarity Mode.
This macro defines the polarity of the TX pin. The possible values it can take are
• true - polarity is inverted
• false - polarity is not inverted
Remarks
None
5.1.11.7.4.25 DRV_USART_POWER_STATE Macro
C
#define DRV_USART_POWER_STATE SYS_MODULE_POWER_IDLE_STOP
Description
USART power state configuration
This macro controls the power state of the USART
Remarks
This feature may not be available in the device or the USART module selected
5.1.11.7.4.26 DRV_USART_WAKE_ON_START_ENABLE Macro
C
#define DRV_USART_WAKE_ON_START_ENABLE
Description
Wake on start enable
This macro configures that the peripheral should wake up on start.
5.1.11.7.4.27 DRV_USART_XFER_BUFFER_NUMBER Macro
C
#define DRV_USART_XFER_BUFFER_NUMBER 10
Description
USART transfer buffer configuration
This macro controls the transfer buffer depth
Remarks
This feature may not be available in the device or the USART module selected
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5.1.11.7.4.28 DRV_USART_BUFFER_FLAGS Enumeration
C
typedef enum {
DRV_USART_BUFFER_FLAG_WRITE,
DRV_USART_BUFFER_FLAG_WRITE_AFTER_BREAK,
DRV_USART_BUFFER_FLAG_WRITE_TO_ADDRESS,
DRV_USART_BUFFER_FLAG_READ_FROM_ADDRESS,
DRV_USART_BUFFER_FLAG_READ,
DRV_USART_BUFFER_FLAG_STOP_ON_ERROR
} DRV_USART_BUFFER_FLAGS;
Description
USART IO Types
This enumeration defines the IO types that can be serviced by the USART driver.
Members
Members Description
DRV_USART_BUFFER_FLAG_WRITE Write Buffer
DRV_USART_BUFFER_FLAG_WRITE_AFTER_BREAK Write Buffer After Sending Break
DRV_USART_BUFFER_FLAG_WRITE_TO_ADDRESS Write Buffer to the address
DRV_USART_BUFFER_FLAG_READ_FROM_ADDRESS Raed Buffer from the address
DRV_USART_BUFFER_FLAG_READ Read Buffer
DRV_USART_BUFFER_FLAG_STOP_ON_ERROR Instructs the driver to stop processing if error is encountered
Remarks
None
5.1.11.7.4.29 DRV_USART_BUFFER_STATUS Enumeration
C
typedef enum {
DRV_USART_BUFFER_COMPLETED,
DRV_USART_BUFFER_QUEUED,
DRV_USART_BUFFER_IN_PROGRESS,
DRV_USART_BUFFER_ERROR_UNKNOWN,
DRV_USART_BUFFER_ERROR_RX_OVERFLOW
} DRV_USART_BUFFER_STATUS;
Description
USART Buffer Status
Defines the states that an USART buffer can be in during its lifetime
Members
Members Description
DRV_USART_BUFFER_COMPLETED Done OK and ready
DRV_USART_BUFFER_QUEUED Scheduled but not started
DRV_USART_BUFFER_IN_PROGRESS Currently being in transfer
DRV_USART_BUFFER_ERROR_UNKNOWN Unknown buffer
DRV_USART_BUFFER_ERROR_RX_OVERFLOW Read data lost: rx process not fast enough
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Remarks
As buffers may have a limited life span, so too have the associated handles and status info. Once a buffer transfer is completed
(and possibly notified and acknowledged) it will be discarded. The status of a discarded buffer is no longer maintained by the
driver.
5.1.11.7.4.30 DRV_USART_CALLBACK Type
C
typedef void (* DRV_USART_CALLBACK)(void);
Description
USART Callback Function
This data type defines a pointer callback function.
Remarks
A USART callback function must have the following function signature:
void MyCallBack ( DRV_USART_BUFFER_HANDLE *bufferHandle );
Where "MyCallBack" can be any name desired as the routine is called through the pointer.
A pointer of this type is passed into the DRV_USART_RegisterCallbacks routine.
5.1.11.7.4.31 DRV_USART_CLIENT_STATUS Enumeration
C
typedef enum {
DRV_USART_CLIENT_STATUS_READY,
DRV_USART_CLIENT_STATUS_BUSY,
DRV_USART_OVERRUN_ERROR,
DRV_USART_PARITY_ERROR,
DRV_USART_FRAMING_ERROR,
DRV_USART_STATUS_INVALID
} DRV_USART_CLIENT_STATUS;
Description
USART Client Status
Defines the various client status codes.
Members
Members Description
DRV_USART_CLIENT_STATUS_READY Up and running, ready to start new operations
DRV_USART_CLIENT_STATUS_BUSY Operation in progress, unable to start a new one
DRV_USART_OVERRUN_ERROR Overrun Error Occured
DRV_USART_PARITY_ERROR Parity Error
DRV_USART_FRAMING_ERROR Framing Error
DRV_USART_STATUS_INVALID client Invalid
Remarks
None
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5.1.11.7.4.32 DRV_USART_HANDSHAKE_MODES Enumeration
C
typedef enum {
DRV_USART_HANDSHAKE_MODE_FLOWCONTROL,
DRV_USART_HANDSHAKE_MODE_SIMPLEX,
DRV_USART_HANDSHAKE_MODE_NONE
} DRV_USART_HANDSHAKE_MODES;
Description
USART Handshake Modes
This data type identifies the handshaking modes available on the USART module.
Members
Members Description
DRV_USART_HANDSHAKE_MODE_FLOWCONTROL Handshaking occurs in Flow Control Mode
DRV_USART_HANDSHAKE_MODE_SIMPLEX Handshaking occurs in Simplex Mode
DRV_USART_HANDSHAKE_MODE_NONE No Handshaking
Remarks
Not all modes are available on all micro-controllers.
5.1.11.7.4.33 DRV_USART_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
USART_MODULE_ID usartID;
uint8_t operationMode;
uint8_t initFlags;
DRV_USART_LINE_CONTROL_MODES lineControlMode;
uint32_t brgValue;
DRV_USART_OPERATION_MODE_INIT operationModeInit;
DRV_USART_HANDSHAKE_MODES handShakeMode;
uint32_t txInterruptSource;
uint32_t rxInterruptSource;
uint32_t errorInterruptSource;
uint32_t rxQueueSize;
uint32_t txQueueSize;
} DRV_USART_INIT;
Description
USART Driver Initialization Data
This data type defines the data required to initialize or reinitialize the USART driver.
Members
Members Description
SYS_MODULE_INIT moduleInit; System module initialization
USART_MODULE_ID usartID; Identifies USART hardware module (PLIB-level) ID
uint8_t operationMode; Operation Modes of the driver
uint8_t initFlags; Flags for the usart initialization
DRV_USART_LINE_CONTROL_MODES
lineControlMode;
Control the line control configuration
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uint32_t brgValue; Baud Rate value to be used, if not using auto baud
DRV_USART_OPERATION_MODE_INIT
operationModeInit;
Operation mode initialization data
DRV_USART_HANDSHAKE_MODES
handShakeMode;
Handshake Mode
uint32_t txInterruptSource; Interrupt Source for TX Interrupt INT_SOURCE txInterruptSource;
uint32_t rxInterruptSource; Interrupt Source for RX Interrupt INT_SOURCE rxInterruptSource;
uint32_t errorInterruptSource; Interrupt Source for Error Interrupt INT_SOURCE errorInterruptSource;
Remarks
Not all the init features are available for all the microcontrollers
5.1.11.7.4.34 DRV_USART_INIT_FLAGS Enumeration
C
typedef enum {
DRV_USART_INIT_FLAG_WAKE_ON_START_ENABLE,
DRV_USART_INIT_FLAG_AUTO_BAUD_ENABLE
} DRV_USART_INIT_FLAGS;
Description
USART Initialization flags
Defines the various flags which determine specific modes
Members
Members Description
DRV_USART_INIT_FLAG_WAKE_ON_START_ENABLE Flag to setup Wake on Start Operation
DRV_USART_INIT_FLAG_AUTO_BAUD_ENABLE Flag to enable auto baud detection enable.
Remarks
None
5.1.11.7.4.35 DRV_USART_IO_BUFFER Structure
C
typedef struct {
DRV_USART_BUFFER_FLAGS flags;
char * buffer;
uint32_t bufferSize;
uint8_t address;
DRV_USART_CALLBACK xferCallback;
} DRV_USART_IO_BUFFER;
Description
USART Driver IO Buffer
This structure holds information that the client must pass the driver to enqueue a buffer to be transferred by a read or write
operation.
Members
Members Description
DRV_USART_BUFFER_FLAGS flags; Defines the IO Type this buffer is associated with
char * buffer; The buffer which needs to be read or written
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uint32_t bufferSize; The size of the buffer which needs to be read or written
uint8_t address; The address which needs to be written
Remarks
A pointer to an instance of this structure must be passed to the DRV_USART_BufferAdd routine.
5.1.11.7.4.36 DRV_USART_LINE_CONTROL_MODES Enumeration
C
typedef enum {
DRV_USART_LINE_CONTROL_MODE_8NONE1,
DRV_USART_LINE_CONTROL_MODE_9NONE1,
DRV_USART_LINE_CONTROL_MODE_8EVEN1,
DRV_USART_LINE_CONTROL_MODE_8EVEN2,
DRV_USART_LINE_CONTROL_MODE_8ODD1,
DRV_USART_LINE_CONTROL_MODE_8ODD2
} DRV_USART_LINE_CONTROL_MODES;
Description
USART Line Control Modes
This data type identifies the line control modes available
Members
Members Description
DRV_USART_LINE_CONTROL_MODE_8NONE1 8 Data Bits, No Parity, 1 Stop Bits
DRV_USART_LINE_CONTROL_MODE_9NONE1 9 Data Bits, No Parity, 1 Stop Bits
DRV_USART_LINE_CONTROL_MODE_8EVEN1 8 Data Bits, Even Parity, 1 Stop Bits
DRV_USART_LINE_CONTROL_MODE_8EVEN2 8 Data Bits, Even Parity, 2 Stop Bits
DRV_USART_LINE_CONTROL_MODE_8ODD1 8 Data Bits, Odd Parity, 1 Stop Bits
DRV_USART_LINE_CONTROL_MODE_8ODD2 8 Data Bits, Odd Parity, 2 Stop Bits
Remarks
None
5.1.11.7.4.37 DRV_USART_OPERATION_MODE_INIT Union
C
typedef union {
struct {
uint8_t address;
} RS485Init;
} DRV_USART_OPERATION_MODE_INIT;
Description
Operation Mode Initialization
This data type defines the initialization data required for different operation modes of USART.
Members
Members Description
struct {
uint8_t address;
} RS485Init;
Initialization for RS485 mode
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uint8_t address; Address of the device.
Remarks
None
5.1.11.7.4.38 DRV_USART_OPERATION_MODES Enumeration
C
typedef enum {
DRV_USART_OPERATION_MODE_IRDA = (1 << 0),
DRV_USART_OPERATION_MODE_RS232,
DRV_USART_OPERATION_MODE_RS485,
DRV_USART_OPERATION_MODE_SYNCHRONOUS_MASTER,
DRV_USART_OPERATION_MODE_SYNCHRONOUS_SLAVE,
DRV_USART_OPERATION_MODE_LOOPBACK
} DRV_USART_OPERATION_MODES;
Description
USART Modes of Operation
This data type identifies the modes of the operation of the USART module.
Members
Members Description
DRV_USART_OPERATION_MODE_RS232 RS232 Mode (Asynchronous Mode of Operation)
DRV_USART_OPERATION_MODE_RS485 RS485 Mode (Asynchronous Mode of Operation)
DRV_USART_OPERATION_MODE_SYNCHRONOUS_MASTER Synchronous Master Mode
DRV_USART_OPERATION_MODE_SYNCHRONOUS_SLAVE Synchronous Slave Mode
DRV_USART_OPERATION_MODE_LOOPBACK Loopback Mode
Remarks
Not all modes are available on all microcontrollers. Refer to the data sheet for the microcontroller in use.
5.1.11.7.4.39 DRV_USART_TRANSFER_STATUS Enumeration
C
typedef enum {
DRV_USART_TRANSFER_STATUS_RX_FULL,
DRV_USART_TRANSFER_STATUS_RX_DATA_PRESENT,
DRV_USART_TRANSFER_STATUS_RX_EMPTY,
DRV_USART_TRANSFER_STATUS_TX_FULL,
DRV_USART_TRANSFER_STATUS_TX_EMPTY
} DRV_USART_TRANSFER_STATUS;
Description
USART Driver Transfer Flags
This type specifies the status of the receive or transmit operation.
Members
Members Description
DRV_USART_TRANSFER_STATUS_RX_FULL Indicates that the core driver buffer is full
DRV_USART_TRANSFER_STATUS_RX_DATA_PRESENT Indicates that at least one byte of Data has been received
DRV_USART_TRANSFER_STATUS_RX_EMPTY Indicates that the core driver receiver buffer is empty
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DRV_USART_TRANSFER_STATUS_TX_FULL Indicates that the core driver transmitter buffer is full
DRV_USART_TRANSFER_STATUS_TX_EMPTY Indicates that the core driver transmitter buffer is empty
Remarks
More than one of these values may be OR'd together to create a complete status value. To test a value of this type, the bit of
interrest must be AND'ed with value and checked to see if the result is non-zero.
5.1.11.7.4.40 DRV_USART_XFER_HANDLE Type
C
typedef uintptr_t DRV_USART_XFER_HANDLE;
Description
USART Transfer Handle
Handle for requested transfer..
Remarks
None
5.1.11.8 Files
Files
Name Description
drv_usart.h USART Driver Interface Definition
drv_usart_config_template.h USART Driver Configuration Template.
Description
5.1.11.8.1 drv_usart.h
USART Driver Interface Definition
The USART device driver provides a simple interface to manage the USART or UART modules on Microchip microcontrollers.
This file defines the interface definition for the USART driver.
Enumerations
Name Description
DRV_USART_BUFFER_FLAGS Defines the IO types that can be serviced by the USART driver
DRV_USART_BUFFER_STATUS Defines the buffer status
DRV_USART_CLIENT_STATUS Defines the client status
DRV_USART_HANDSHAKE_MODES Identifies the handshaking modes available on the USART
DRV_USART_INIT_FLAGS Defines specific initialization features
DRV_USART_LINE_CONTROL_MODES Identifies the line control modes available
DRV_USART_OPERATION_MODES Identifies the modes of the operation of the USART module
DRV_USART_TRANSFER_STATUS Specifies the status of the receive or transmit
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Functions
Name Description
DRV_USART_BufferAdd Starts the writes to the communication channel.
DRV_USART_BufferStatus Provides the status of the given buffer
DRV_USART_BufferTransferStatus Gets the number of bytes which are written or read
DRV_USART_ClientStatus Gets current client-specific status the USART driver
DRV_USART_Close Closes an opened-instance of the USART driver
DRV_USART_Deinitialize Deinitializes the specified instance of the USART driver module
DRV_USART_Initialize Initializes the USART instance for the specified driver index
DRV_USART_Open Opens the specified timer driver instance and returns a handle to it
DRV_USART_Read Reads data from the USART
DRV_USART_ReadByte Reads a byte of data from the USART
DRV_USART_Reinitialize Reinitializes the USART driver and refreshes any associated hardware
settings
DRV_USART_Status Gets the current status of the USART driver module.
DRV_USART_TasksError Maintains the driver's error-handling state machine and implements its ISR
DRV_USART_TasksRX Maintains the driver's receiver state machine and implements its ISR
DRV_USART_TasksTX Maintains the driver's tramsmitter state machine and implements its ISR
DRV_USART_TransferStatus Returns the transmitter and receiver transfer status
DRV_USART_Write Writes data to the USART
DRV_USART_WriteByte Writes a byte of data to the USART
Macros
Name Description
DRV_USART_INDEX_0 USART driver index definitions
DRV_USART_INDEX_1 This is macro DRV_USART_INDEX_1.
DRV_USART_INDEX_2 This is macro DRV_USART_INDEX_2.
DRV_USART_INDEX_3 This is macro DRV_USART_INDEX_3.
DRV_USART_INDEX_4 This is macro DRV_USART_INDEX_4.
DRV_USART_INDEX_5 This is macro DRV_USART_INDEX_5.
DRV_USART_INDEX_COUNT Number of valid USART driver indices
Structures
Name Description
DRV_USART_INIT Defines the data required to initialize or reinitialize the USART driver
DRV_USART_IO_BUFFER IO buffer information structure
Types
Name Description
DRV_USART_CALLBACK Pointer to a USART callback function
DRV_USART_XFER_HANDLE Handle for requested transfer..
Unions
Name Description
DRV_USART_OPERATION_MODE_INIT Defines the initialization data required for different operation modes of
USART
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File Name
drv_usart.h
Company
Microchip Technology Incorported
5.1.11.8.2 drv_usart_config_template.h
USART Driver Configuration Template
These file provides the list of all the configurations that can be used with the driver. This file should not be included in the driver.
Macros
Name Description
DRV_USART_AUTO_BAUD_ENABLE Macro configures enabling the auto baud.
DRV_USART_BAUD_RATE Macro controls operation of the driver for Baud rate configuration
DRV_USART_BYTE_Q_SIZE_RX Macro controls operation of the driver for defining the size of the
Rx buffer
DRV_USART_BYTE_Q_SIZE_TX Macro controls operation of the driver for defining the size of the
Tx buffer
DRV_USART_CLIENTS_NUMBER Sets up the maximum number of clients that can be connected to
any hardware instance.
DRV_USART_HANDSHAKE_MODE Configures the handshake mode
DRV_USART_INDEX USART Static Index selection
DRV_USART_INSTANCES_NUMBER Sets up the maximum number of hardware instances that can be
supported
DRV_USART_INTERRUPT_MODE Macro controls operation of the driver in the interrupt mode
DRV_USART_INTERRUPT_SOURCE_ERROR Defines the interrupt source for the error interrupt
DRV_USART_INTERRUPT_SOURCE_RX Macro to define the Rx interrupt source in case of static driver
DRV_USART_INTERRUPT_SOURCE_TX Macro to define the Tx interrupt source in case of static driver
DRV_USART_LINE_CONTROL Macro defines the line control mode
DRV_USART_OPERATION_MODE Defines the mode to be used for the USART driver
DRV_USART_PERIPHERAL_ID Configures the PLIB id
DRV_USART_POLARITY_INVERTED_RX Defines the polarity of the RX pin.
DRV_USART_POLARITY_INVERTED_TX Defines the polarity of the TX pin.
DRV_USART_POWER_STATE Macro controls power state of the USART
DRV_USART_WAKE_ON_START_ENABLE Macro configures that the peripheral should wake up on start
DRV_USART_XFER_BUFFER_NUMBER Transfer buffer depth
File Name
drv_usart_config_template.h
Company
Microchip Technology Incorported
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5.1.12 USB Driver Library
5.1.12.1 Introduction
USB Device Driver Library
for
Microchip Microcontrollers
This library provides an interface to manage the USB module on Microchip family of micro controllers during different modes of
operation.
Description
Overview of the USB Module
The USB module implements the physical layer in a USB based system. In that, it allows the USB stack software to access and
control the USB. The USB module on Microchip's micro controllers are compliant with the USB 2.0 specification. This help file
only provides relevant information about the operation of the USB. The reader is encouraged to refer to the USB 2.0 specification
available at www.usb.org for complete information about the USB.
Not all Microchip microcontrollers feature a USB module. Among the ones that do, the supported features may vary. Please refer
to the device specific data sheet for details on the availability of the USB module and the supported features.
Note: Trademarks and Intellectual Property are property of their respective owners. Customers are responsible for obtaining
appropriate licensing or rights before using this software.
5.1.12.2 Release Notes
MPLAB Harmony Version: v0.70b USB Driver Library Version : 1.0 Release Date: 18Nov2013
New This Release:
• Supports all four (Control, Bulk, Interrupt and Isochronous) USB Transfers.
• Control transfers supported on endpoint 0 only.
• Endpoint 0 pipe is always bidirectional. All other endpoint pipes require Receive and Transmit pipes to be opened separately.
• Supports multiple clients. Device function drivers can communicate on the USB directly via the USB Driver.
• Setup packet reception is automatic and does not require client intervention or scheduling. Clients receive notification when a
Setup packet is received.
• The static multi client version of the driver support one transfer object per Control, Bulk and Interrupt Pipe and supports 2
transfer objects per Isochronous Pipe.
Known Issues:
• Nothing to report in this release
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5.1.12.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.12.4 Using the Library
This topic describes the basic architecture of the USB Driver Library and provides information and examples on how to use it.
Interface Header File: drv_usb.h
The interface to the USB Driver library is defined in the "drv_usb.h" header file.
Please refer to the MPLAB Harmony Overview for how the Driver interacts with the framework.
5.1.12.4.1 Library Overview
Refer to the section Driver Overview for how the driver operates in a system. The library interface routines are divided into
various subsections, each of the sub section addresses one of the blocks or the overall operation of the USB module.
Library Interface Section Description
System Functions These routines are typically invoked by the MPLAB Harmony system
module.
Client Functions These routines are used by the driver clients to access driver functionality
Pipe Functions These routines allow clients to manage pipes
Transfer Functions These routines allow clients to manage transfers
Other Functions These routines represent the rest of the driver functionality
Data Types and Constants These data types and constants are required while interacting and
configuring the driver
5.1.12.4.2 Abstraction Model
Figure 1: USB Driver Device Mode Model
Figure 1 shows the functioning of the USB Driver in device mode. In this mode, the driver offers services required to operate the
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USB module as a USB device. The USB Driver supports multiple clients. Each client can receive notifications about USB events
via callback functions. Typical clients could be the Device Layer firmware and one or more function drivers. The Device layer
firmware and the function drivers communicate on the USB via pipes. A pipe is an association between the device's endpoint
and host stack software. An Endpoint 0 Pipe is always bi-directional and is a message pipe. Communication on this pipe is
defined by the USB specification. All other endpoints support stream pipes. The format of the data on a stream pipe is not
specified by the USB specification. Stream pipes are uni-directional. Therefore, two pipes are required to transmit and receive
data on a non-zero endpoint.
Clients schedule USB transfers through a pipe. Transfers on non-zero endpoint pipes can be queued. The USB driver manages
the transactions required to complete the transfer. This is transparent to the clients. Clients can either get an event notification or
can poll to check the completion status of a transfer. Clients can register callback functions to receive USB events notification. A
Transfer complete callback function can be registered while requesting a transfer. This function will be called when the transfer is
terminated. While operating in device mode, the first client of the USB Driver should always be the USB Device Stack Device
layer. Only the first client can schedule control transfers on endpoint 0 (via a pipe) and receive the Setup Token and Setup
Handshake events (along with the other events). Other clients may or may not register an event call back function.
The USB Driver uses configuration macros that control among other things, functional aspects such as maximum number of
clients and maximum pipes.
5.1.12.4.3 How the Library Works
Before the driver is ready for use, its should be configured. Refer to the Configuring the Library section for more details on how
to configure the driver.
To use the USB Driver, initialization and client functions should be invoked in a specific sequence to ensure correct operation.
The following is the sequence in which various routines should be called:
1. Call the DRV_USB_Init() function to initialize the USB Driver. Note that this may be performed by the MPLAB Harmony
system module.
2. In USB device mode operation, the first client should always be the USB Device Stack Device Layer. The Device Layer first
opens the driver via the DRV_USB_Open() function.
3. The Device layer registers an event call back function via the DRV_USB_Device_EventCallBackSet() function.
4. The Device layer assigns a setup packet buffer by using the DRV_USB_Device_SetupPacketBufferAssign() function. The
driver stores the received setup packet in this buffer. Calling this function also enables the USB Device Mode and at this point
the device will attach to the host and be ready to receive setup tokens from the host.
5. The Device Layer waits for the Reset Event. In this event, the device layer creates an endpoint 0 pipe by using the
DRV_USB_Device_PipeSetup() function. The Device layer can optionally register a transfer complete call back function. This
function will be called when a transfer on the endpoint zero is complete.
6. Based on the device enumeration process and the selected configuration, other function drivers may open the driver by using
the DRV_USB_Open() function.
It is strongly recommended that the above sequence be followed for correct operation on the driver.
Note: Not all modes are available on all the devices, please refer to the specific device data sheet for the set of modes
supported.
5.1.12.4.3.1 Driver Initialization
At the time of initialization, the DRV_USB_Initialize() function requires DRV_MODULE_INIT data structure that provides
information required for the function of the driver. The following data is needed:
1. Maximum number of endpoints to be supported by the driver. In case endpoints are skipped, the largest endpoint number
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should be used. For example, if the application uses endpoints 0,1 and 2, then maximum number of endpoints should 3. If the
application uses endpoints 0,1 and 5, then maximum number of endpoints should 6. The latter configuration is not recommended.
2. Maximum side of the endpoint 0. This should match the maximum size that is reported to the host during enumeration.
3. Pointer to byte array whose size is defined DRV_USB_WORKING_BUFFER_SIZE(nEndpoint, maxEP0Size), where
nEndpoint is the maximum number of endpoint as described in point 1 above and maxEP0Size is the maximum endpoint 0 size
as described in point 2 above. These values should match usbInitData.ep0MaxSize and usbInitData.nEndpoints.
4. The PLIB peripheral ID of the USB module to associated with the driver object being initialized.
5. The operation mode of the driver (host, device or OTG). Refer to the Release Notes for supported modes.
5. The ping pong mode to be used by internal endpoint buffers. Refer to the device specific data sheet for supported ping pong
modes.
6. Behavior of the USB module when the microcontroller device enters IDLE mode.
7. Behavior of the USB module when the microcontroller device enters SLEEP mode.
8. Power state of the USB module.
9. USB module interrupts to be enabled. These include the general, error and OTG interrupts. Refer to the USB PLIB
documentation for available module interrupts.
10. The interrupt source of the USB module to be used with the driver instance. Refer to the USB PLIB documentation for
available module interrupts.
The following code snippet shows an example initialization of the driver.
/* The following code snippet shows an example initialization of the
* driver. The USB module to be used in USB1. The maximum number of
* endpoints to be used is 3 i.e endpoint 0,1 and 2. Maximum size of
* endpoint 0 is 64. The module should not automatically suspend when the
* micro-controller enters Sleep mode. The module should continue
* operation when the module enters Idle mode. The ping pong setting
* is set to full ping pong (both RX and TX endpoints have ping
* pong buffers). The power state is set to run at full clock speeds.*/
DRV_USB_INIT moduleInit;
uint8_t internalBuffer[[DRV_USB_WORKING_BUFFER_SIZE(3,64)]
__attribute__((aligned(512)));
usbInitData.usbID = USB_ID_1;
usbInitData.usbModuleSetup.OpMode = USB_OPMODE_DEVICE;
usbInitData.usbModuleSetup.ppMode = USB_PING_PONG__FULL_PING_PONG;
usbInitData.usbModuleSetup.StopInIdle = false;
usbInitData.usbModuleSetup.SuspendInSleep = false;
usbInitData.usbModuleSetup.otgInterruptEnables = ~USB_OTG_INT_ALL ;
usbInitData.usbModuleSetup.generalInterruptEnables = USB_INT_ALL & ~USB_INT_SOF ;
usbInitData.usbModuleSetup.errorInterruptEnables = USB_ERR_INT_ALL ;
usbInitData.workingBuffer = internalBuffer;
usbInitData.ep0MaxSize = 64;
usbInitData.nEndpoints = 3;
usbInitData.sysModuleInit.powerState = SYS_MODULE_POWER_RUN_FULL ;
usbInitData.interruptSource = INT_SOURCE_USB_1;
/* This is how this data structure is passed to the initialize
* function. */
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DRV_USB_Initialize(DRV_USB_INDEX_0, (SYS_MODULE_INIT *) &usbInitData);
5.1.12.4.3.2 Opening the Driver
Once the driver is initialized for device mode, it can be opened by clients. The client must specify which driver instance it wants
to be a client to and IO mode in which the driver should be opened. The USB Device Driver while operating in USB device mode
only supports non-blocking, read write and shared client access I/O intent mode. Trying to open the driver in any other mode will
cause the open routine to fail.
The driver treats the first client that opens it, differently from the other clients. This first client must open a bi-directional pipe on
endpoint zero. It must then register a Setup Packet Buffer with the driver. The driver uses this buffer to store the 8 byte Setup
command details received during the Setup stage of a Control transfer. While all clients can register a USB event callback
function, only the first client receives the USB_DEVICE_SETUP_TOKEN and the USB_DEVICE_SETUP_HANDSHAKE event in
its callback routine.
Typically (and it is recommended that) the first client to open the driver should be the USB Device Stack Device Layer Firmware.
The Device Layer firmware is responsible for enumerating the USB device and responding to host requests on the Endpoint 0
message pipe. The first client should register a USB event callback function (by using the
DRV_USB_Device_EventCallbackSet() function) and Setup Packet Buffer (by using the
DRV_USB_Device_SetupPacketBufferAssign() function) with the Driver. Both of these are essential for operation of the driver.
Registering a Setup Packet Buffer via the DRV_USB_Device_SetupPacketBufferAssign() also enables the USB device
(activates the USB module pull up resistors) for operation on the USB.
The following code snippet shows an example of how a USB Device Stack Device Layer should open the driver and perform
other functions.
/* In this example, the USB Device Layer (myUSBDevice) opens
* the USB Driver. It is assumed that the Driver is already
* initialized */
myUSBDevice.usbDriverHandle = DRV_USB_Open(DRV_USB_INDEX_0,
DRV_IO_INTENT_NONBLOCKING|DRV_IO_INTENT_READWRITE|DRV_IO_INTENT_SHARED );
if(DRV_HANDLE_INVALID == myUSBDevice.usbDriverHandle)
{
/* The open function failed. We can find out why */
if(USB_CLIENT_NOTAVAIL == DRV_USB_Device_DriverClientErrorGet(DRV_USB_INDEX_0))
{
/* This means that there is no space for another client.
* The driver configuration needs to be modified to support
* more clients. This can be done by increasing the value
* of DRV_USB_CLIENTS_NUMBER */
while(1);
}
}
/* Set the client event callback for the Device Layer.
* The USBDeviceLayerEventHandler() function is the event
* handler. When this event handler is invoked by the
* driver, the driver returns back the second argument
* specified in the below function (which in this case
* is the device layer data structure). This allows the
* application firmware to identify, as an example, the
* device layer object associated with this callback
*/
DRV_USB_Device_EventCallBackSet(myUSBDevice.usbDriverHandle, (void *)&myUSBDevice,
USBDeviceLayerEventHandler);
/* Device Layer register setup packet buffer. The Setup Packet Bufffer
* size is 8 bytes and is of the type uint8_t. Calling this function
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* enables the device and the device is ready to receive a Setup token
* from the host. */
DRV_USB_Device_SetupPacketBufferAssign(myUSBDevice.usbDriverHandle, setupPacketBuffer);
/* Device Layer opens a endpoint 0 pipe. Refer to Setting
* up a Pipe section for more details on how to set up the
* pipe. This may be done in the reset event.*/
myUSBDevice.ep0Pipe = DRV_USB_Device_PipeSetup(myUSBDevice.usbDriverHandle, 0,
USB_EP_TX_RX,
64, 1, USB_CONTROL_PIPE);
A function driver may open the driver for use based on the configuration set by the host. Function drivers may or may not require
USB Event notification and so may not need to register a USB Event Callback function. The user application can also open the
driver. This allows the user application to track USB events and also communicate directly on the bus. The following code
snippet shows an example of how a function driver can open the USB Driver.
/* This code snippet shows an example of how the
* a function driver, say CDC, could open the USB Driver.
* Note that this should happen on a set configuration
* event from the host. */
cdc.usbDriverHandle = DRV_USB_Open(DRV_USB_INDEX_0,
DRV_IO_INTENT_NONBLOCKING|DRV_IO_INTENT_READWRITE );
if(DRV_HANDLE_INVALID == cdc.usbDriverHandle)
{
/* The open function failed. We can find out why */
if(USB_CLIENT_NOTAVAIL == DRV_USB_Device_DriverClientErrorGet(DRV_USB_INDEX_0))
{
/* This means that there is no space for another client.
* The driver configuration needs to be modified to support
* more clients.This can be done by increasing the value
* of DRV_USB_CLIENTS_NUMBER */ */
while(1);
}
}
/* Set the USB Event handler for CDC. Note that
* this optional and should be done only if the
* function driver requires USB Events notification. */
DRV_USB_Device_EventCallBackSet(cdc.usbDriverHandle, (void *)&cdc,
CDCDeviceUSBEventHandler);
/* CDC Function driver opens a TX and RX bulk pipe on
* endpoint 1. */
cdc.bulkRxPipe = DRV_USB_Device_PipeSetup(cdc.usbDriverHandle, 1,
USB_EP_RX, 64, 3, USB_BULK_PIPE);
cdc.bulkTxPipe = DRV_USB_Device_PipeSetup(cdc.usbDriverHandle, 1,
USB_EP_TX, 64, 3, USB_BULK_PIPE);
5.1.12.4.3.3 Endpoint Pipes
A client must open a pipe in order to schedule transfers on the USB. This is done by using the DRV_USB_Device_PipeSetup()
function. From a USB perspective, an endpoint 0 pipe is a message pipe (or a control pipe). The data flowing through this pipe
has a structure which defined by the USB specification. Pipes on non-zero endpoints are stream pipes and need not follow a
specific format. A Pipe connects a device's endpoint to a Host Driver software. Endpoint 0 pipe is always needed and must be
created for the USB device to enumerate and hence operate correctly. Non-zero endpoint pipes are created based on the
configuration set by the Host.
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5.1.12.4.3.3.1 Pipe Setup
The DRV_USB_Device_PipeSetup() function creates a pipe. The following points should be noted while using this function to
create a pipe.
1. The pipeDirection argument specifies the pipe direction. An endpoint 0 pipe is always bi-directional. So this parameter is
ignored when the nEndpoint parameter is 0. All other pipes must be unidirectional. Specifying USB_EP_TX as the pipe direction
sets up the pipe to send data from device to host (host Read transfers). Specifying USB_EP_RX as the pipe direction sets up the
pipe to receive data from host (host Write transfers).
2. The nBytesMaxSize parameter specifies the maximum size of the data packet in a transaction on that pipe. It should not
exceed the maximum endpoint size communicated to the host during enumeration. Depending on the type of the USB transfer
that the pipe will handle and the speed of the USB, the maximum size of the data packet may vary. If the size of the read transfer
(device to host) scheduled on the pipe is greater than nBytesMaxSize, the driver will respond correctly multiple transactions that
are issued by the host to complete the transfer.
3. The nXferQueueSize parameter defines the size of the transfers that can be queued up this pipe. The minimum queue size
should be 1. The control pipe (endpoint 0 pipe) always has queue size of 1. Control transfers on the endpoint 0 pipe cannot be
queued. Refer to the Transfer Request section for more information on how transfers are scheduled. Other non-zero endpoint
pipes can have a queue size greater than or equal to 1.
4. An endpoint and direction of communication cannot be shared between two pipes. For example if a client opens a RX pipe on
endpoint 1, another RX pipe on endpoint 1 cannot be opened.
5. The pipeType parameter specified the type of transfers that this pipe will handle.
The client can check the return value of the DRV_USB_Device_PipeSetup() for the result. If the pipe was not setup successfully,
the function returns DRV_HANDLE_INVALID. The client can then use the DRV_USB_Device_ClientPipeErrorGet() function to
find out the reason for the failure.
The following code snippet shows how endpoint 0 pipe and non-zero endpoint pipes are created.
/* This is an example of how an endpoint 0 pipe is created.
* Note that this pipe is always bi-directional and the
* queue size is always 1. The maximum data packet size in this
* case is 64. The pipe type is set to handle control transfers */
myUSBDevice.ep0Pipe = DRV_USB_Device_PipeSetup(myUSBDevice.usbDriverHandle, 0,
USB_EP_TX_RX,
64, 1, USB_CONTROL_PIPE);
if(DRV_HANDLE_INVALID == myUSBDevice.ep0Pipe)
{
switch(DRV_USB_Device_ClientPipeErrorGet(myUSBDevice.usbDriverHandle))
{
case USB_PIPE_QUEUE_NOT_AVAILABLE:
/* This means that queue size is small. Increase
* the value of DRV_USB_XFERS_NUMBER. */
break;
case USB_PIPE_BAD_ENDPT:
/* The specified endpoint is greater than the
* the maximum end points that driver is configured
* to handle. */
break;
case USB_PIPE_TAKEN:
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/* The specified endpoint and direction are already
* in use with another pipe. A non-zero endpoint
* can have only one pipe in a direction. Endpoint
* 0 can have one bi-directional pipe.*/
break;
case USB_PIPE_NOTAVAIL:
/* No pipes are available. Increase the number of pipes
* by increasing the value of DRV_USB_PIPES_NUMBER. */
break;
case USB_PIPE_BAD_DIRECTION:
/* Non zero endpoint cannot be bi-directional. */
break;
}
/* This is an example of how a client creates a non-zero endpoint pipe.
* In this case a TX and a RX pipe are opened on endpoint 1. The
* transfer schedule queue size is 4 and maximum data packet size
* is 64. Note that the maximum data packet size should match endpoint
* size specified in the endpoint configuration. */
cdc.bulkRxPipe = DRV_USB_Device_PipeSetup(cdc.usbDriverHandle, 1, USB_EP_RX, 64, 3,
USB_BULK_PIPE);
/* Optionally check for error here by using the
* DRV_USB_Device_ClientPipeErrorGet() function */
cdc.bulkTxPipe = DRV_USB_Device_PipeSetup(cdc.usbDriverHandle, 1, USB_EP_TX, 64, 3,
USB_BULK_PIPE);
/* Optionally check for error here by using the
* DRV_USB_Device_ClientPipeErrorGet() function */
/* The following usage of DRV_USB_Device_PipeSetup() is INCORRECT and
* will not work. The client must create separate TX and RX pipes for
* non-zero endpoints. This function will return DRV_HANDLE_INVALID
* and the DRV_USB_Device_ClientPipeErrorGet()function will return
* USB_PIPE_BAD_DIRECTION. */
someDevice.bulkPipe = DRV_USB_Device_PipeSetup(someDevice.usbDriverHandle, 1,
USB_EP_TX_RX, 64, 3, USB_BULK_PIPE); // Will not work!
5.1.12.4.3.3.2 Pipe Status
The client can use the DRV_USB_Device_PipeStatusGet() function to obtain the status of the pipe. The client can use this
information to find if a pipe is ready for transfers or if the pipe can be or is stalled. The following code snippet shows an example
of the DRV_USB_Device_PipeStatusGet() function along with all the possible return values.
/* This code example assumes the DRV_USB_DevicePipeSetup() function
* was used to open a pipe */
DRV_USB_PIPE_HANDLE pipeHandle;
DRV_USB_PIPE_STATUS pipeStatus;
if(DRV_HANDLE_INVALID != pipeHandle)
{
pipeStatus = DRV_USB_Device_PipeStatusGet(pipeHandle);
switch (pipeStatus)
{
case USB_PIPE_CLOSED:
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/* The pipe was open and has been closed.
* This pipe should not be used for transferring
* data */
break;
case USB_PIPE_XFER_IN_PROGRESS:
/* There is a transfer in progress on the USB
* through this pipe.
*/
break;
case USB_PIPE_READY:
/* Pipe is ready for transferring data. Also
* indicates that there is no transfer in progress
* on the USB through this pipe
*/
break;
case USB_PIPE_STALLED:
/* Pipe is stalled. No transfers will take place.
*/
break;
}
}
5.1.12.4.3.3.3 Pipe Close
An open pipe can be closed by using the DRV_USB_Device_PipeRelease() function. Calling this function performs the following
function
1. It aborts all transfers that are in queue. If a transfer is in progress on the USB, it is cancelled.
2. It de-allocates its transfer queue and returns it to the driver.
3. It de-allocates the pipe and returns its to the driver.
The DRV_USB_Device_PipeRelease() may be called when the device stack detects detach from the host, or when a USB reset
event had been detected. Because this function aborts transfers that are in progress on the USB, it is possible that calling this
function while a transfer is in progress can cause the USB protocol to be violated. To avoid this, the client can use the
DRV_USB_Device_PipeStatusGet() function to get the status of the pipe before closing it. In case of a USB reset event, the
client can close the pipe without checking pipe status as the driver itself will cancel all transfer that are in progress.
The following code snippet shows example usage of the DRV_USB_Device_PipeRelease() function.
/* This code snippet assumes that this is not a reset
* event. In such a case, it is recommended that any
* transfers through the pipe be allowed to complete.
*/
while(DRV_USB_Device_PipeStatusGet(pipeHandle) == USB_PIPE_XFER_IN_PROGRESS);
/* Close the pipe */
DRV_USB_Device_PipeRelease(pipeHandle);
5.1.12.4.3.3.4 Pipe Transfer Queue
A pipe provides a queue for transfer requests. Clients can use the queue to reduce wait times and hence increase data
throughput through the pipe. If the pipe queue size is greater than one, the transfer requests on the pipe will be added to the
queue if a transfer is already in progress on the pipe. The size of queue is specified via the nXferQueueSize parameter in the
DRV_USB_Device_PipeSetup() function. The queue contains transfer objects that hold information about the requested
transfers. Multiple driver instance share one aggregate queue. The size of aggregate queue is defined by the
DRV_USB_XFERS_NUMBER macro in the driver configuration. Pipe specific queues are formed from this aggregate queue.
Figure 2 shows how this works.
Figure 2: Pipe Transfer Queues.
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Figure 2a shows the aggregate driver queue. In this case, all the transfer objects in the queue are available for use. In figure 2b,
the client creates a pipe (pipe 0) with a queue size of 1. This results in the first transfer object on the queue forming a single
element queue for pipe 0. In figure 2c, the client creates a pipe (pipe 1) with a queue size of 3. This results in the next three
transfer objects on the queue forming a 3 element queue for pipe 1. In figure 2d, the client creates a pipe (pipe 2) with a queue
size of 4. This results in the next four transfer objects on the queue forming a 4 element queue for pipe 2. At this point, if a client
tries to create another pipe with queue size of say 4, the pipe will not be created as there isn't enough space available in the
queue.
The size of the aggregate queue should be decided in such a way as to meet the application's dynamic requirements while
taking the memory availability into consideration.
5.1.12.4.3.3.5 Pipe Stall
The client can stall a pipe in response to USB events. When a pipe is stalled, it returns a STALL PID on the USB. The USB
device firmware may stall endpoint 0 pipe when control requests from the host fail or are not supported. The driver automatically
clears an endpoint 0 pipe stall when the host sends a SETUP packet. A non-zero endpoint pipe may be stalled when the
endpoint's Halt feature is set. This is a functional stall. In this case the endpoint cannot send or receive data. Endpoint 0 pipe
may not need to support functional stalls (although they can but this is rarely done). A pipe is stalled using the
DRV_USB_Device_PipeStall() function and a pipe stall is cleared using the DRV_USB_Device_PipeStallClear() function.
There are 3 execution threads where the driver client can stall a pipe.
1. A pipe can be stalled in the client event handler.
The client can stall the pipe after receiving the USB_DEVICE_SETUP_TOKEN event. This is relevant to control transfer on
endpoint 0 pipe. The firmware can stall the pipe if it does not support the command received in the Setup packet. It is
recommended that both direction of the endpoint 0 pipe be stalled (this is possible because endpoint 0 pipe is always
bi-directional). Figure 3 shows the transaction related to this case.
Figure 3: Stalling Endpoint 0 pipe on a Control Read Transfer. Pipe is stalled after USB_DEVICE_SETUP_TOKEN event.
The stall on the receive direction of the pipe will get cleared when the host issues a Setup token. The stall on the TX direction of
the pipe needs to cleared by using the DRV_USB_Device_PipeStallClear() function. For endpoint 0 pipe, it is recommend that
the stall on both directions be cleared. Note that is also possible to stall non-zero pipes in the USB_DEVICE_SETUP_TOKEN
event. See code example below.
void USBEventHandler (void * referenceHandle,
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DRV_USB_EVENT eventType, DRV_USB_EVENT_DATA * eventData )
{
switch ( eventType )
{
/* There could be other events here as well. Only
* the USB_DEVICE_SETUP_TOKEN is shown in this eaxample
* for the sake of clarity */
case USB_DEVICE_SETUP_TOKEN:
// Setup token received from host
if(ProcessSetupPacket(eventData->setupEventData.pSetupPktBuffer) == false)
{
/* This means the command received in the setup packet is
* not supported. The endpoint should be stalled. While
* stalling endpoint 0, both directions should be stalled.
* This ensures that both data stage and handshake stage
* of the control transfer get stalled. */
DRV_USB_Device_PipeStall(pipe0, USB_EP_TX_RX);
}
else
{
/* Setup packet command can be processed */
if(DRV_USB_Device_PipeStatusGet(pipe0) == USB_PIPE_STALLED)
{
/* Clear the pipe stall */
DRV_USB_Device_PipeStallClear(pipe0, USB_EP_TX_RX);
}
}
break;
}
}
2. A pipe can be stalled in the transfer complete event handler.
This is more relevant to Control Write transfers. In the case of Control Write transfers, the transfer complete event handler is
called after the data stage of the control transfer. If the firmware does not support the contents of the data stage, it can stall the
pipe. This will result in the handshake stage of the control write transfer getting stalled. Figure 4 shows the transactions related
to this case.
Figure 4: Stalling Endpoint 0 pipe on a Control Write Transfer. Pipe is stalled in the Transfer Complete Callback
Function.
The following code snippet shows an example of this:
void USBDeviceLayerXferCallback( void * referenceData,
DRV_USB_PIPE_HANDLE hPipe,
DRV_USB_XFER_HANDLE hTransfer,
unsigned short int transferByteCount ,
DRV_USB_DEVICE_XFER_STATUS statusTransfer )
{
/* Note that the transfer call contains the pipe
* handle. This pipe handle can be used to
* stall the pipe */
DRV_USB_Device_PipeStall(hPipe, USB_EP_TX_RX);
}
3. A pipe can be stalled asynchronous of driver events.
The client can stall a pipe based on device firmware logic. This is more applicable to non-zero endpoint pipes. Since these pipes
are uni-directional, the client must specify the stall direction (USB_EP_TX or USB_EP_RX) while calling the
DRV_USB_Device_PipeStall() function. Using the USB_EP_TX parameter will stall read transfers (IN tokens). Using the
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USB_EP_RX parameter will stall write transfers (OUT tokens).
5.1.12.4.3.4 Event Handling
Any client that opens the driver can register to receive USB events. These USB events can be used by the clients to achieve the
desired functionality of the USB device. The first client to open the driver (typically the USB Stack device layer firmware) will
receive additional events. The client uses the DRV_USB_Device_EventCallBackSet() to set the client event call back function.
The following code snippet shows a client event handler function.
/* This is the client event handler */
void ClientEventHandler (void * referenceHandle,
DRV_USB_EVENT eventType,
DRV_USB_EVENT_DATA * eventData )
{
switch ( eventType )
{
case USB_ERROR:
// Bus error occurred and was reported in error interrupts
break;
case USB_DEVICE_RESET:
// Host has commanded a device reset
break;
case USB_DEVICE_RESUME:
// Resume detected while USB in suspend mode
break;
case USB_IDLE_DETECT:
// Idle detected
break;
case USB_STALL:
// Stall handshake has occurred
break;
case USB_DEVICE_SETUP_TOKEN:
// A Setup token was received
break;
case USB_DEVICE_SETUP_HANDSHAKE:
// Handshake stage of the control
// transfer is completed.
break;
// Device received a Start of Frame
case USB_DEVICE_GOT_SOF
break;
default:
break;
}
}
/* The client register the event handler
* after it has opened the driver. referenceData
* will be passed back to the event callback function
* whenever it is invoked. */
DRV_USB_Device_EventCallBackSet(clientHandle, referenceData, ClientEventHandler);
The eventData argument in the event callback function should be interpreted according to the event. The following table shows
all the possible events and the value of eventData for each event.
Event Type Event Details Interpretation of eventData
USB_ERROR This event occurs when the USB module
has detected an error on the bus
eventData.usbErrorData.errorType contains
a bitmap of errors (defined by
USB_ERROR_TYPE) that have occurred.
USB_DEVICE_RESET This event occurs when the USB module
has detected a USB Reset
NULL
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USB_DEVICE_RESUME This event occurs when the USB module
has detected Resume Signalling
NULL
USB_IDLE_DETECT This event occurs when the USB module
has not detected any bus activity
NULL
USB_STALL This event occurs when a stalled
endpoint has received a token
eventData.stalledEnpoint.endpoint contains
the stalled endpoint that recevied a token.
USB_DEVICE_SETUP_TOKEN This event occurs when endpoint 0 has
received a SETUP token
eventData.setupEventData.pSetupPktBuffer
points to a 8 byte array that contains the
setup command that was received.
USB_DEVICE_SETUP_HANDSHAKE This event occurs when the handshake
stage of a Control Write Transfer has
completed.
NULL
USB_DEVICE_GOT_SOF This event occurs when the USB module
has received a start of frame.
NULL
The following code snippet shows the different USB errors that can occur
USB_ERROR_TYPE error = eventData.usbErrorData.errorType;
/* These are the possible errors that can occur.
* Refer to the device specific data sheet for
* more details on these errors. */
if (errorType & USB_ERR_INT_PID_CHECK_FAILURE)
{
/* Invalid or unsupported PID received */
}
if ( errorType & USB_ERR_INT_BAD_CRC5)
{
/* A CRC 5 error was encountered */
}
if ( errorType & USB_ERR_INT_BAD_CRC16)
{
/* A CRC 16 error was encountered */
}
if ( errorType & USB_ERR_INT_BAD_DATA_FIELD_SIZE)
{
/* Unsupported data field size was encountered */
}
if ( errorType & USB_ERR_INT_BUS_TURNAROUND_TIMEOUT)
{
/* A bus turn around timeout was encountered */
}
if ( errorType & USB_ERR_INT_DMA_ERROR)
{
/* A USB DMA error was encountered */
}
if ( errorType &= USB_ERR_INT_BUS_MATRIX_ERROR)
{
/* A Bus matrix error was encountered */
}
if ( errorType & USB_ERR_INT_BIT_STUFF_ERROR)
{
/* A bit stuffing error was encountered */
}
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5.1.12.4.3.5 Transfer Requests
A USB Driver (operating in Device mode) client can receive and transmit data from the USB Host after creating a pipe. Data is
transferred by using the DRV_USB_Device_TransferRequest() function. Four types of USB transfers are supported: Control,
Bulk, Interrupt and Isochronous. The choice of transfer type depends on the nature of desired communication and the target
functionality of the USB device. Requesting a transfer will cause the USB driver to schedule the transfer. The actual data
communication takes place when the host has requested for the data. In cases where a transfer is already in progress and space
is available on the pipe transfer queue, the transfer request is added to the queue and processed in turn. Transfers that are not
in progress (pending in the queue) can be aborted by using the DRV_USB_Device_TransferAbort() function.
Depending on the size of the endpoint and the amount of data to be transferred, the host may complete the transfer through
multiple transactions. This process is handled by the driver and is transparent to the client. The client can register a transfer
complete event callback function for each transfer request. This function is called when the transfer is terminated, either because
its completed or aborted. Optionally the client can call the DRV_USB_Device_TransferStatusGet() function to poll the status of
the transfer. The transfer complete event callback function need not be registered in this case.
The DRV_USB_Device_TransferRequest() function also accepts flags that affect the processing of the transfer. The flag options
are transfer type specific.
The following section provides more details on how the four different transfer types can be requested:
5.1.12.4.3.5.1 Control Transfers
The USB Driver supports Control Read and Write Transfers on a endpoint 0 pipe only. A control transfer (either read or write)
occurs in stages:
1. The SETUP stage provides a setup command which among other things also defines if the transfer is a Control Read (data
moves from device to host) or a Control Write transfer (data moves from host to device).
2. The DATA stage transports data related to the setup command in the SETUP stage. Depending on the size of the endpoint,
the data stage could comprise of multiple IN or OUT transactions. A data stage may or may not be present in Control Write
transfers.
3. The HANDSHAKE stage completes the Control transfer.
Control Transfers should only be requested in response to a setup packet from the host. The USB Driver notifies its first client
(via the client event call back function) when a SETUP packet has been received. Only the first client receives this,
USB_DEVICE_SETUP_TOKEN, event. The driver generates USB_DEVICE_SETUP_HANDSHAKE client event at the
completion of the handshake stage of the control write transfer. Refer to Event Handling section on more details on handling
events.
The client parses the 8-byte setup command available from the USB_DEVICE_SETUP_TOKEN, event. It then has the following
options:
1. The client can request a control read transfer.
2. The client can request a control write transfer.
3. The client may not do anything and return from the event handler. In this case, the control transfer is treated as having no data
stage and the transfer moves to the handshake stage. Note that a Control Read transfer must always have a data stage.
4. The client can stall the pipe.
These cases are described here in detail.
1. Requesting a Control Read Transfer:
The code snippet below shows an example of how a Control Read Transfer can be requested. In this transfer, data moves from
the device to the host.
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/* This is an example of a Control Read Transfer. A control read
* or Write transfer should be requested in response to a
* USB_DEVICE_SETUP_TOKEN event. The transfer request function is
* called in the USB event handler. In this example, the amount of
* data to be transferred is 18 bytes. The transfer is requested
* over endpoint 0 pipe. The USBDeviceLayerXferCallback() function
* will be called when the transfer is terminated. The myUSBDevice
* object will be passed back to the USBDeviceLayerXferCallback()
* function. The USB_XFER_REGULAR indicates to the driver that this
* transfer does not need a data stage ZLP */
DRV_USB_XFER_HANDLE xferHandle;
void USBEventHandler (void * referenceHandle,
DRV_USB_EVENT eventType, DRV_USB_EVENT_DATA * eventData )
{
switch ( eventType )
{
/* There could be other events here as well. Only
* the USB_DEVICE_SETUP_TOKEN is shown in this eaxample
* for the sake of clarity */
case USB_DEVICE_SETUP_TOKEN:
// Setup token received from host
ProcessSetupPacket(eventData->setupEventData.pSetupPktBuffer);
xferHandle = DRV_USB_Device_TransferRequest(myUSBDevice.ep0Pipe,
USB_XFER_CONTROL_READ, deviceDescriptor,18,
USB_XFER_REGULAR, myUSBDevice,
USBDeviceLayerXferCallback);
if(DRV_HANDLE_INVALID == xferHandle)
{
/* If the transfer request failed, the
* client can find out why. */
switch(DRV_USB_Device_PipeXferErrorGet(myUSBDevice.ep0Pipe))
{
case USB_XFER_WRONG_PIPE:
/* This means that either the transfer type or
* does not match the pipe type or direction */
break;
case USB_XFER_QUEUE_FULL:
/* This means that the transfer queue on this
* pipe is full. Either increase the queue size
* by increasing the value of DRV_USB_XFERS_NUMBER
* or wait for a slot on the queue to be available. */
break;
default:
break;
}
}
}
}
In a case where the data to be transferred is more than the endpoint size reported to the host (also specified at the time when
the control endpoint pipe is setup), the host will break up the data stage of the transfer into multiple transactions. This process is
transparent to the client. If at any point a SETUP packet is received while the transfer was in progress, the transfer is aborted
and client receives USB_DEVICE_SETUP_TOKEN event. If a transfer complete callback function was registered in the transfer
request function, this callback function is called with transfer status as USB_XFER_ABORT. Figure 5 shows the generation of
different events during the Control Read Transaction
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Figure 5: Control Read Transfer. Data size is 18 bytes. Maximum Endpoint size is 64 bytes (> 18 bytes).
A Control read transfer must have a data stage. In cases of control read transfers where the amount of data to be transferred is
less than that requested by the host, the USB_XFER_SEND_ZLP flag must be specified. The driver will then check if the transfer
size is an exact multiple of the endpoint size and then send a data stage zero length packet (ZLP). This indicates to the host that
the device does not have any more data. There are two cases where specifying the USB_XFER_SEND_ZLP flag does not
cause the driver to send a ZLP.
- When the size of the transfer is less than requested size but is not an exact multiple of the maximum endpoint size.
- The size of the transfer is less than maximum endpoint size.
The following code snippet shows an example of a transfer request which sends a ZLP to the host.
/* This is an example of a Control Read Transfer with the ZLP
* option. Endpoint 0 maximum size is 8 bytes. The host has
* requested 32 bytes but the device has only 24 bytes to send.
* Specifying the USB_XFER_SEND_ZLP flag will cause the driver
* to send a ZLP to the host in the fourth data transaction.
*/
DRV_USB_XFER_HANDLE xferHandle;
xferHandle = DRV_USB_Device_TransferRequest(myUSBDevice.ep0Pipe, USB_XFER_CONTROL_READ,
deviceDescriptor,24,USB_XFER_SEND_ZLP,
myUSBDevice, USBDeviceLayerXferCallback);
Figure 6 shows the generation of different events and the additional ZLP sent in data stage in a multi transaction Control Read
Transfer.
Figure 6: Multi Transaction Control Read Transfer with ZLP. Data size is 24 bytes and maximum endpoint size is 8 bytes.
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2. Requesting a Control Write Transfer:
The code snippet below shows an example of how a Control Write Transfer can be requested. In this transfer, data moves from
the host to device. The code example below shows an example of how a control write transfer is requested. Figure 7 shows the
generation of different events related to the control write transfer.
/* This is an example of a Control Write Transfer. A control read
* or Write transfer should be requested in response to a
* USB_DEVICE_SETUP_TOKEN event. The transfer request function is
* called in the USB event handler. In this example, the amount of
* data to be transferred is 32 bytes. The transfer is requested
* over endpoint 0 pipe. The USBDeviceLayerXferCallback() function
* will be called when the transfer is terminated. The myUSBDevice
* object will be passed back to the USBDeviceLayerXferCallback()
* function. The Control Write Transfer only supports the
* USB_XFER_REGULAR flag. */
DRV_USB_XFER_HANDLE xferHandle;
void USBDeviceLayerXferCallback( void * referenceData,
DRV_USB_PIPE_HANDLE hPipe,
DRV_USB_XFER_HANDLE hTransfer,
unsigned short int transferByteCount ,
DRV_USB_DEVICE_XFER_STATUS statusTransfer )
{
/* This function will be called when the transfer is complete.
* In this case, the referenceData argument will point to the
* myUSBDevice data object that was specified in the Transfer
* request function. */
}
void USBEventHandler (void * referenceHandle,
DRV_USB_EVENT eventType, DRV_USB_EVENT_DATA * eventData )
{
switch ( eventType )
{
/* There could be other events here as well. Only
* the USB_DEVICE_SETUP_TOKEN is shown in this eaxample
* for the sake of clarity */
case USB_DEVICE_SETUP_TOKEN:
// Setup token received from host
ProcessSetupPacket(eventData->setupEventData.pSetupPktBuffer);
xferHandle = DRV_USB_Device_TransferRequest(myUSBDevice.ep0Pipe,
USB_XFER_CONTROL_WRITE, buffer,32,
USB_XFER_REGULAR, myUSBDevice,
USBDeviceLayerXferCallback);
if(DRV_HANDLE_INVALID == xferHandle)
{
/* The DRV_USB_Device_PipeXferErrorGet() can be used to
* find the error cause */
}
}
}
In addition to the USB_DEVICE_SETUP_TOKEN event, the driver generates the USB_DEVICE_SETUP_HANDSHAKE event
when the Control Write Handshake stage is complete. This event is generated even when the Control Write transfer does not
have a data stage.
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Figure 7: Example of Control Write Transfer. Data size is 18 bytes and maximum endpoint size is 64 bytes (> 18 bytes).
3. Control Write Transfers with Zero Data Stage.
A control write transfer can have zero data stages. One example of this is the SET ADDRESS command that the USB host send
to the device during enumeration. In cases where no data stages are needed, the client should not request any transfer and
return from the USB event handler. This will cause the driver to move the control transfer to the handshake stage. The
USB_DEVICE_SETUP_HANDSHAKE can be used to track when the handshake stage of the transfer completes. In case of the
SET ADDRESS command, the device layer firmware can change the device USB address in response to this event. The code
example below shows an example of how this is done.
/* This is an example of zero data stage Control Write transfer.
* This is done by not issuing a transfer request after the
* USB_DEVICE_SETUP_TOKEN event is received. */
DRV_USB_XFER_HANDLE xferHandle;
void USBEventHandler (void * referenceHandle,
DRV_USB_EVENT eventType, DRV_USB_EVENT_DATA * eventData )
{
switch ( eventType )
{
/* There could be other events here as well. Only
* the USB_DEVICE_SETUP_TOKEN is shown in this eaxample
* for the sake of clarity */
case USB_DEVICE_SETUP_TOKEN:
/* Setup token received from host. In this case we assume
* that this is the SET ADDRESS command. This command does
* not have a data stage. So the client does not do a
* transfer request*/
ProcessSetupPacket(eventData->setupEventData.pSetupPktBuffer);
break;
case USB_DEVICE_SETUP_HANDSHAKE:
/* The last control write transfer request is complete.
* In this example, the client can change the device USB address
* now. */
DRV_USB_Device_AddressSet(deviceLayer, address);
break;
default:
break;
}
}
Figure 8 shows the generation of different events related to the transfer.
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Figure 8: Example of Zero data stage Control Write Transfer.
4.Stalling the Pipe:
Refer to Pipe Stall section for more details on how a pipe can be stalled.
5.1.12.4.3.5.2 Bulk and Interrupt Transfers
The driver can process Bulk and Interrupt transfers. On the USB, both Bulk and Interrupt transfers have the same packet
structure. The following discussion therefore applies to both Bulk and Interrupt transfers. A client should use the
DRV_USB_Device_TransferRequest() function to schedule Bulk and Interrupt transfers. The following sections describe
Bulk/Interrupt Read Transfers and Bulk/Interrupt Write Transfers.
1. Bulk/Interrupt Read Transfers:
In this transfer, data moves from device to host. The client can request a bulk/interrupt read transfer with a byte size greater than
the maximum endpoint size. In this case the driver will complete the transfer and invoke the transfer complete callback function if
provided. If the USB_XFER_SEND_ZLP flag is specified, the driver sends a ZLP after the last transaction if the transfer size was
an exact multiple of the endpoint size.
The following code snippet shows an example of a Bulk/Interrupt read transfer can be requested
/* This code snippet shows an example of how a Bulk/Interrupt
* read transfer can be requested */
DRV_USB_XFER_HANDLE transferHandle;
transferHandle = DRV_USB_Device_TransferRequest(pipe1, USB_XFER_BULK_READ,
data,120,USB_XFER_REGULAR, someReferenceData ,XferCompleteCallback);
/* This transfer directs the driver to send a ZLP
* after the last transaction */
transferHandle = DRV_USB_Device_TransferRequest(pipe1, USB_XFER_BULK_READ,
data,128,USB_XFER_SEND_ZLP, someReferenceData ,XferCompleteCallback);
Figure 9 shows a regular bulk/interrupt read transfer. Figure 10 shows a bulk/interrupt read transfer with a ZLP.
Figure 9: Example of Bulk/Interrupt Read Transfer. Requested transfer size is 120 bytes. Maximum endpoint size 64
Figure 10: Example of Bulk/Interrupt Read Transfer with ZLP. Requested transfer size is 128 bytes. Maximum endpoint
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size 64
2. Bulk/Interrupt Write Transfers:
In this transfer, data moves from host to device. These transfers only support USB_XFER_REGULAR flag. The client can
request a bulk/interrupt write transfer with a byte size greater than the maximum endpoint size. . In this case however, the driver
will invoke the transfer complete callback function when a transaction completes. The callback thus gets invoked whenever the
host sends any amount of data. Since the amount of data that the host sends in one transaction will not exceed the maximum
endpoint size, specifying a transfer size greater than maximum endpoint size will not have any effect. The client must schedule
another transfer to receive more data from the host. The following code snippet shows an example of bulk/interrupt write transfer.
/* This code snippet shows an example of how a Bulk/Interrupt
* write transfer can be requested. Note the data size is
* equal the size of the endpoint. The client has queued up
* multiple transfers.*/
DRV_USB_XFER_HANDLE transferHandle1;
DRV_USB_XFER_HANDLE transferHandle1;
transferHandle1 = DRV_USB_Device_TransferRequest(pipe2, USB_XFER_BULK_WRITE,
data,64,USB_XFER_REGULAR, someReferenceData ,XferCompleteCallback);
transferHandle1 = DRV_USB_Device_TransferRequest(pipe2, USB_XFER_BULK_WRITE,
data,64,USB_XFER_REGULAR, someReferenceData ,XferCompleteCallback);
Figure 11 shows a bulk/interrupt write transfer with related events
Figure 11: Example of Bulk/Interrupt Write Transfer. Client has scheduled two tranfers Maximum endpoint size 64
5.1.12.4.3.5.3 Isochronous Transfers
A client can request Isochronous transfers by using the DRV_USB_Device_TransferRequest() function. On the USB,
Isochronous transfers are characterized by the absence of the handshake stage. The driver supports USB_XFER_REGULAR
and USB_XFER_PERSIST flags for Isochronous transfers. While using the USB_XFER_REGULAR flag, the transfer request
behavior is similar to Bulk and Interrupt Read/Write Transfer Requests. In that, a new transfer will require the client to call the
DRV_USB_Device_TransferRequest() function.
By using the USB_XFER_PERSIST flag, the driver will not discard the transfer after the transfer is complete. Instead, after the
transfer is complete, the transfer is rescheduled in the queue. This way the client does not have to schedule another transfer. If
the client has scheduled two Isochronous transfers with the USB_XFER_PERSIST flag, the driver will ping pong between these
transfers. The transfer complete callback function is called when the transfer is completed.
The code snippet below shows an example of setting up two Isochronous read transfers to create a ping pong type of transfer
system.
DRV_USB_XFER_HANDLE pingTransferHandle;
DRV_USB_XFER_HANDLE pongTransferHandle;
/* Request two transfers. Note how the USB_XFER_PERSIST flag
* is specified. Note also how the pingData and pongData buffer
* pointers are specified as reference data. This will make
* processing in the transfer complete call back easier.. */
pingTransferHandle = DRV_USB_Device_TransferRequest(pipe0, USB_XFER_CONTROL_READ,
pingData,64,USB_XFER_PERSIST, pingData ,PingXferCompleteCallback);
pongTransferHandle = DRV_USB_Device_TransferRequest(pipe0, USB_XFER_CONTROL_READ,
pongData,40,USB_XFER_PERSIST, pongData ,PongXferCompleteCallback);
/* This is the Ping transfer Complete callback */
void PingCompleteCallback( void * referenceData,
DRV_USB_PIPE_HANDLE hPipe,
DRV_USB_XFER_HANDLE hTransfer,
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unsigned short int transferByteCount ,
DRV_USB_DEVICE_XFER_STATUS statusTransfer )
{
/* Note that we dont schedule one more request here.
* We just add data to the buffer and return. This
* same transfer will be processed again. The referenceData
* points to the ping data buffer (as set in the transfer request
* function. */
void * data = referenceData;
UpdateBuffer(data);
}
/* This is the Ping transfer Complete callback */
void PongCompleteCallback( void * referenceData,
DRV_USB_PIPE_HANDLE hPipe,
DRV_USB_XFER_HANDLE hTransfer,
unsigned short int transferByteCount ,
DRV_USB_DEVICE_XFER_STATUS statusTransfer )
{
/* Note that we dont schedule one more request here.
* We just add data to the buffer and return. This
* same transfer will be processed again. The referenceData
* points to the pong data buffer (as set in the transfer request
* function. */
void * data = referenceData;
UpdateBuffer(data);
}
5.1.12.4.3.5.4 Transfer Status
The driver offers to different interface to track the status of a transfer, a polling interface and a callback interface. Both these
interfaces can be invoked by the application. The two interfaces are discussed here:
1. Polling interface:
The client can access the polling interface by using the DRV_USB_Device_XferStatusGet() function. This interface does not
provide information when a transfer is aborted. The following code snippet shows how DRV_USB_Device_XferStatusGet() is
used.
/* This code snippet shows the different
* values that the DRV_USB_Device_XferStatusGet()
* function. This function implements the polling
* interface for the transfer status.
*/
DRV_USB_DEVICE_XFER_STATUS transferStatus;
transferStatus = DRV_USB_Device_XferStatusGet(transferHandle);
switch(transferStatus)
{
case USB_XFER_PENDING:
/* This means the transfer is still in the transfer
* queue. This transfer can be aborted.*/
case USB_XFER_IN_PROGRESS:
/* This means the transfers is currently in progress
* on the bus. This transfer cannot be aborted. */
case USB_XFER_COMPLETED:
/* This measn the transfer is complete */
default:
break;
}
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2. Callback interface:
The callback interface to track the status of the transfer is implemented by using Transfer Complete Callback function. The client
should specify the Transfer Complete Callback function when calling DRV_USB_Device_TransferRequest() function. The driver
call this function when a transfer has terminated, either due to the transfer completing or the transfer aborting. The Transfer
Complete Callback function should be of the type DRV_USB_XFER_COMPLETE_CALLBACK. The driver returns the following
information while calling the Transfer Complete Callback function.
1. Handle to the pipe that contained this transfer
2. Handle to the transfer
3. Number of bytes read or written
4. A reference to a data object that was specified in the DRV_USB_Device_TransferRequest() for this transfer.
5. Transfer termination status
The following code snippet shows an example of how a Transfer Complete Callback function can be used.
/* This code snippet shows an example of how to use the
* transfer complete callback */
DRV_USB_XFER_HANDLE transferHandle;
/* Request a transfer. Note that the reference data pointer is set
* to dataBuffer and the transfer complete callback function
* XferCompleteCallback is specified. */
transferHandle = DRV_USB_Device_TransferRequest(pipe0, USB_XFER_CONTROL_READ,
dataBuffer,18,false, dataBuffer ,XferCompleteCallback);
/* This is the transfer Complete callback */
void XferCompleteCallback( void * referenceData,
DRV_USB_PIPE_HANDLE hPipe,
DRV_USB_XFER_HANDLE hTransfer,
unsigned short int transferByteCount ,
DRV_USB_DEVICE_XFER_STATUS statusTransfer )
{
/* The referenceData variable (the value of which
* is specified in the transfer request function)
* points to the data buffer associate with the
* transfer. */
void * dataBuffer = referenceData;
if(transferStatus == USB_XFER_COMPLETED)
{
ProcessDataBuffer(dataBuffer, transferByteCount);
}
else if(transferStatus == USB_XFER_ABORTED)
{
/* This transfer was not successful. Take any
* remedial action as needed. */
}
}
5.1.12.4.3.5.5 Transfer Abort
A client can abort a USB transfer that it requested. This is achieved by using the DRV_USB_Device_TransferAbort() function. A
Control read or write transfer can automatically get aborted when the host issues a SETUP token out of turn. The
DRV_USB_Device_TransferAbort() will not abort a transfer if it is already in progress. Closing the pipe will however abort
transfers that are in progress.
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When a transfer is aborted, the Transfer Complete Callback function associated with the transfer is not invoked. If the Control
Read or Write transfer was aborted due to a out of turn SETUP token from the host, Transfer Complete Callback function will be
called and transfer status will be USB_XFER_ABORTED.
5.1.12.5 Configuring the Library
The configuration of the USB Driver is based on the file sys_config.h
This header file contains the configuration selection for the USB Driver. Based on the selections made, the USB Driver will
support or not support selected features. Some configuration settings will apply to all instances of the USB Driver while some
configurations settings are applicable only if the driver is built for a static mode.
This header can be placed anywhere, the path of this header needs to be present in the include search path for a successful
build. Refer to the Applications Overview section for more details.
5.1.12.5.1 Initialization Overrides
This section lists out the macros that need to be configured when building the static version of the driver. These values should be
defined for correction operation of the driver, when the driver is built statically. Commenting the
DRV_USB_INSTANCES_NUMBER macro will cause the driver to be built in a static mode.
5.1.12.5.2 Others
These macros affect all instances and all build types of the driver.
5.1.12.6 Building the Library
The following table lists the USB Driver files to be included in the project for the available features
Features File Path Comments
Needed for all
features
driver/usb/drv_usb.h Must be included in every source code file that access
the driver API.
Dynamic Build driver/usb/src/dynamic/drv_usb.c Must be included when using the dynamic version of
the driver
Static Multi-Client
Build
driver/usb/src/static_multi/drv_usb_static_multi.c Must be included when using the static multi client
version of the driver
5.1.12.7 Library Interface
Data Types and Constants
Name Description
DRV_USB_ENDPOINT_TABLE_ENTRY_SIZE
DRV_USB_HOST_PIPE_HANDLE_INVALID Defines the USB Driver Host Pipe Invalid handle
DRV_USB_INDEX This is macro DRV_USB_INDEX.
DRV_USB_INDEX_0 USB driver index definitions
DRV_USB_INTERRUPT_SOURCE This is macro DRV_USB_INTERRUPT_SOURCE.
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DRV_USB_PERIPHERAL_ID This is macro DRV_USB_PERIPHERAL_ID.
DRV_USB_EVENT Identifies the different events that the USB Driver provides.
DRV_USB_EVENT_CALLBACK Type of the USB event callback function
DRV_USB_HOST_PIPE_HANDLE Defines the USB Driver Host Pipe handle type
DRV_USB_INIT Contains all the data necessary to initialize the USB device
Client Functions
Name Description
DRV_USB_Close Closes an opened-instance of the USB driver
DRV_USB_Open Opens the specified USB driver instance and returns a handle to it
Other Functions
Name Description
DRV_USB_ClientEventCallBackSet This function sets up the event callback function that is invoked by the
USB controller driver to notify the a client of USB bus events.
DRV_USB_DEVICE_AddressSet This function will set the USB module address that is obtained from
the host.
DRV_USB_DEVICE_Attach This function will attach the device to the USB.
DRV_USB_DEVICE_CurrentSpeedGet This function will return the USB speed at which device is operating.
DRV_USB_DEVICE_Detach This function will detach the device from the USB.
DRV_USB_DEVICE_EndpointDisable This function disables an endpoint.
DRV_USB_DEVICE_EndpointDisableAll This function disables all provisioned non-zero endpoints.
DRV_USB_DEVICE_EndpointEnable This function enables a endpoint for the specified direction and
endpoint size.
DRV_USB_DEVICE_EndpointIsEnabled This function returns the enable/ disable status of the specified
endpoint and direction.
DRV_USB_DEVICE_EndpointIsStalled This function returns the stall status of the specified endpoint and
direction.
DRV_USB_DEVICE_EndpointStall This function stalls an endpoint in the specified direction.
DRV_USB_DEVICE_EndpointStallClear This function clears the stall on an endpoint in the specified direction.
DRV_USB_DEVICE_IRPCancelAll This function cancels all IRPs that are queued and in progress at the
specified endpoint.
DRV_USB_DEVICE_IRPSubmit This function submits a I/O Request Packet (IRP) for processing to
the USB Driver.
DRV_USB_HOST_BusResetControl This is function DRV_USB_HOST_BusResetControl.
DRV_USB_HOST_DeviceCurrentSpeedGet This is function DRV_USB_HOST_DeviceCurrentSpeedGet.
DRV_USB_HOST_IRPCancel This is function DRV_USB_HOST_IRPCancel.
DRV_USB_HOST_IRPSubmit This is function DRV_USB_HOST_IRPSubmit.
DRV_USB_HOST_OperationEnable This is function DRV_USB_HOST_OperationEnable.
DRV_USB_HOST_StartOfFrameControl This is function DRV_USB_HOST_StartOfFrameControl.
DRV_USB_HOST_TimerIsComplete This is function DRV_USB_HOST_TimerIsComplete.
DRV_USB_HOST_TimerReset This is function DRV_USB_HOST_TimerReset.
DRV_USB_HOST_TimerStart This is function DRV_USB_HOST_TimerStart.
DRV_USB_Tasks Maintains the driver's state machine when the driver is configured for
polled mode.
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Pipe Functions
Name Description
DRV_USB_HOST_PipeSetup This is function DRV_USB_HOST_PipeSetup.
DRV_USB_HOST_PipeClose This is function DRV_USB_HOST_PipeClose.
System Functions
Name Description
DRV_USB_Initialize Initializes the USB driver
DRV_USB_Status Provides the current status of the USB driver module
DRV_USB_Tasks_ISR Maintains the driver's state machine and implements its ISR
DRV_USB_HOST_OperationIsEnabled This is function DRV_USB_HOST_OperationIsEnabled.
Description
This section describes the APIs of the USB Driver. Refer to each section for a detailed description.
5.1.12.7.1 System Functions
5.1.12.7.1.1 DRV_USB_Initialize Function
C
SYS_MODULE_OBJ DRV_USB_Initialize(
const SYS_MODULE_INDEX drvIndex,
const SYS_MODULE_INIT * const init
);
Description
This routine initializes the USB driver, making it ready for clients to open and use it.
Preconditions
None.
Parameters
Parameters Description
drvIndex Ordinal number of driver instance to be initialized
init Pointer to a data structure containing any data necessary to initialize the driver.
This should be a DRV_USB_INIT structure reference type casted to
SYS_MODULE_INIT reference.
Returns
If successful, returns a valid handle to a driver object. Otherwise, it returns SYS_MODULE_OBJ_INVALID. The returned object
must be passed as argument to DRV_USB_Status routines.
Remarks
This routine must be called before any other USB routine is called. This routine should only be called once during system
initialization unless DRV_USB_Deinitialize is called to de-initialize the driver instance. If the driver is built for static mode, then
the initialization data structure is ignored. The static overrides provided in system_config.h are considered instead.
Example
// The following code snippet shows an example initialization of the
// driver. The USB module to be used is USB1. The module should not
// automatically suspend when the microcontroller enters Sleep mode.
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// The module should continue operation when the module enters Idle
// mode. The power state is set to run at full clock speeds. Device
// Mode operation should be at FULL speed.
DRV_USB_INIT moduleInit;
usbInitData.usbID = USB_ID_1;
usbInitData.opMode = DRV_USB_OPERATION_MODE_DEVICE;
usbInitData.pingpongMode = USB_PING_PONG_FULL_PING_PONG;
usbInitData.stopInIdle = false;
usbInitData.suspendInSleep = false;
usbInitData.operationSpeed = USB_SPEED_FULL;
usbInitData.interruptSource = INT_SOURCE_USB;
usbInitData.sysModuleInit.powerState = SYS_MODULE_POWER_RUN_FULL ;
// This is how this data structure is passed to the initialize
// function.
DRV_USB_Initialize(DRV_USB_INDEX_0, (SYS_MODULE_INIT *) &usbInitData);
5.1.12.7.1.2 DRV_USB_Status Function
C
SYS_STATUS DRV_USB_Status(
SYS_MODULE_OBJ object
);
Description
This routine provides the current status of the USB driver module.
Preconditions
Function DRV_USB_Initialize must have been called before calling this
Parameters
Parameters Description
object Driver object handle, returned from the DRV_USB_Initialize routine
Returns
• SYS_STATUS_READY - Indicates that the driver is ready
• SYS_STATUS_UNINITIALIZED - Indicates that the driver has never been initialized
Remarks
None.
Example
SYS_MODULE_OBJ object; // Returned from DRV_USB_Initialize
SYS_STATUS status;
DRV_USB_INIT moduleInit;
usbInitData.usbID = USB_ID_1;
usbInitData.opMode = DRV_USB_OPERATION_MODE_DEVICE;
usbInitData.stopInIdle = false;
usbInitData.suspendInSleep = false;
usbInitData.operationSpeed = USB_SPEED_FULL;
usbInitData.interruptSource = INT_SOURCE_USB;
usbInitData.sysModuleInit.powerState = SYS_MODULE_POWER_RUN_FULL ;
// This is how this data structure is passed to the initialize
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// function.
object = DRV_USB_Initialize(DRV_USB_INDEX_0,
(SYS_MODULE_INIT *) &usbInitData);
status = DRV_USB_Status(object);
if(SYS_STATUS_READY == status)
{
// Driver is ready to be opened.
}
5.1.12.7.1.3 DRV_USB_Tasks_ISR Function
C
void DRV_USB_Tasks_ISR(
SYS_MODULE_OBJ object
);
Description
This routine is used to maintain the driver's internal state machine and implement its ISR for interrupt-driven implementations.
Preconditions
The DRV_USB_Initialize routine must have been called for the specified USB driver instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from DRV_USB_Initialize)
Returns
None
Remarks
This routine should be called from the USB interrupt service routine. In case of multiple USB modules, it should be ensured that
the correct USB driver system module object is passed to the this routine.
Example
SYS_MODULE_OBJ object; // Returned from DRV_USB_Initialize
while (true)
{
DRV_USB_Tasks_ISR (object);
// Do other tasks
}
5.1.12.7.1.4 DRV_USB_HOST_OperationIsEnabled Function
C
bool DRV_USB_HOST_OperationIsEnabled(
DRV_HANDLE hClient
);
Description
This is function DRV_USB_HOST_OperationIsEnabled.
5.1.12.7.2 Client Functions
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5.1.12.7.2.1 DRV_USB_Close Function
C
void DRV_USB_Close(
DRV_HANDLE handle
);
Description
This routine closes an opened-instance of the USB driver, invalidating the handle.
Preconditions
The DRV_USB_Initialize routine must have been called for the specified USB driver instance. DRV_USB_Open must have been
called to obtain a valid opened device handle.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
Returns
None
Remarks
After calling this routine, the handle passed in "handle" must not be used with any of the remaining driver routines. A new handle
must be obtained by calling DRV_USB_Open before the caller may use the driver again.
Example
DRV_HANDLE handle; // Returned from DRV_USB_Open
DRV_USB_Close(handle);
5.1.12.7.2.2 DRV_USB_Open Function
C
DRV_HANDLE DRV_USB_Open(
const SYS_MODULE_INDEX drvIndex,
const DRV_IO_INTENT intent
);
Description
This routine opens the specified USB driver instance and provides a handle that must be provided to all other client-level
operations to identify the caller and the instance of the driver. The intent flag should always be
DRV_IO_INTENT_EXCLUSIVE|DRV_IO_INTENT_READWRITE|DRV_IO_INTENT_NON_BLOCKING. Anyother setting of the
intent flag will return a invalid driver handle. A driver instance can only support one client. Trying to open a driver that has an
existing client will result in an unsuccessful function call.
Preconditions
Function DRV_USB_Initialize must have been called before calling this function.
Parameters
Parameters Description
drvIndex Driver instance that client will use
intent Should always be
DRV_IO_INTENT_EXCLUSIVE|DRV_IO_INTENT_READWRITE|
DRV_IO_INTENT_NON_BLOCKING.
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Returns
If successful, valid driver handle for the client to use when interfacing with the driver. If an error occurs, the return value is
DRV_HANDLE_INVALID.
Remarks
The handle returned is valid until the DRV_USB_Close routine is called.
Example
// Shows an example of how to open the driver.
SYS_MODULE_OBJ object; // Returned from DRV_USB_Initialize
SYS_STATUS status;
DRV_USB_INIT moduleInit;
DRV_HANDLE handle;
usbInitData.usbID = USB_ID_1;
usbInitData.opMode = DRV_USB_OPERATION_MODE_DEVICE;
usbInitData.stopInIdle = false;
usbInitData.operationSpeed = USB_SPEED_FULL;
usbInitData.suspendInSleep = false;
usbInitData.interruptSource = INT_SOURCE_USB;
usbInitData.sysModuleInit.powerState = SYS_MODULE_POWER_RUN_FULL ;
// This is how this data structure is passed to the initialize
// function.
object = DRV_USB_Initialize(DRV_USB_INDEX_0,
(SYS_MODULE_INIT *) &usbInitData);
status = DRV_USB_Status(object);
if(SYS_STATUS_READY == status)
{
// Driver is ready to be opened.
handle = DRV_USB_Open(DRV_USB_INDEX_0,
DRV_IO_INTENT_EXCLUSIVE|
DRV_IO_INTENT_READWRITE|
DRV_IO_INTENT_NON_BLOCKING);
SYS_ASSERT(DRV_HANDLE_INVALID != handle,"Bad handle returned");
}
5.1.12.7.3 Pipe Functions
5.1.12.7.3.1 DRV_USB_HOST_PipeSetup Function
C
DRV_USB_HOST_PIPE_HANDLE DRV_USB_HOST_PipeSetup(
DRV_HANDLE client,
uint8_t deviceAddress,
USB_ENDPOINT endpointAndDirection,
uint8_t hubAddress,
uint8_t hubPort,
USB_TRANSFER_TYPE pipeType,
uint8_t bInterval,
uint16_t wMaxPacketSize,
USB_SPEED speed
);
Description
This is function DRV_USB_HOST_PipeSetup.
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5.1.12.7.3.2 DRV_USB_HOST_PipeClose Function
C
void DRV_USB_HOST_PipeClose(
DRV_USB_HOST_PIPE_HANDLE pipeHandle
);
Description
This is function DRV_USB_HOST_PipeClose.
5.1.12.7.4 Transfer Functions
5.1.12.7.5 Other Functions
5.1.12.7.5.1 DRV_USB_ClientEventCallBackSet Function
C
void DRV_USB_ClientEventCallBackSet(
DRV_HANDLE handle,
uintptr_t hReferenceData,
DRV_USB_EVENT_CALLBACK myEventCallBack
);
Description
This function sets up the event callback function that is envoked by the USB controller driver to notify the client of USB bus
events. The call back is disabled by not calling this function after a USB_DRV_Open or by passing NULL for the
myEventCallBack argument. When the callback function is called, the hReferenceData argument is returned.
Preconditions
None.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
hReferenceData object (could be a pointer) that is returned with the callback.
myEventCallBack Call back function for all USB events.
Returns
None.
Remarks
Typical usage of the USB Driver requires a client to register a callback.
Example
// Set the client event callback for the Device Layer.
// The USBDeviceLayerEventHandler() function is the event
// handler. When this event handler is invoked by the
// driver, the driver returns back the second argument
// specified in the below function (which in this case
// is the device layer data structure). This allows the
// application firmware to identify, as an example, the
// device layer object associated with this callback
//
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DRV_USB_ClientEventCallBackSet(myUSBDevice.usbDriverHandle,
(uintptr_t)&myUSBDevice,
USBDeviceLayerEventHandler);
5.1.12.7.5.2 DRV_USB_DEVICE_AddressSet Function
C
void DRV_USB_DEVICE_AddressSet(
DRV_HANDLE handle,
uint8_t address
);
Description
This function will set the USB module address that is obtained from the host in a setup transaction. The address is obtained from
the SET_ADDRESS command issued by the host. The primary (first) client of the driver uses this function to set the module's
USB address after decoding the setup transaction from the host.
Preconditions
None.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
address The address of this module on the USB bus
Returns
None.
Remarks
None.
Example
// This function should be called by the first client of the driver,
// which is typically the device layer. The address to set is obtained
// from the host during enumeration.
DRV_USB_DEVICE_AddressSet(deviceLayer, 4);
5.1.12.7.5.3 DRV_USB_DEVICE_Attach Function
C
void DRV_USB_DEVICE_Attach(
DRV_HANDLE handle
);
Description
This function will attach the device to the USB. It does this by enabling the pull up resistors on the D+ or D- lines. This function
should be called when the driver client is ready to receive communication from the host (typically after all initialization is
complete).
Preconditions
Client handle should be valid.
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Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
Returns
None.
Remarks
None.
Example
// Open the device driver and attach the device to the USB.
SYS_MODULE_OBJ object; // Returned from DRV_USB_Initialize
SYS_STATUS status;
DRV_USB_INIT moduleInit;
DRV_HANDLE handle;
usbInitData.usbID = USB_ID_1;
usbInitData.opMode = DRV_USB_OPERATION_MODE_DEVICE;
usbInitData.stopInIdle = false;
usbInitData.suspendInSleep = false;
usbInitData.operationSpeed = USB_SPEED_FULL;
usbInitData.interruptSource = INT_SOURCE_USB;
usbInitData.sysModuleInit.powerState = SYS_MODULE_POWER_RUN_FULL ;
// This is how this data structure is passed to the initialize
// function.
object = DRV_USB_Initialize(DRV_USB_INDEX_0,
(SYS_MODULE_INIT *) &usbInitData);
status = DRV_USB_Status(object);
if(SYS_STATUS_READY == status)
{
// Driver is ready to be opened.
handle = DRV_USB_Open(DRV_USB_INDEX_0,
DRV_IO_INTENT_EXCLUSIVE|
DRV_IO_INTENT_READWRITE|
DRV_IO_INTENT_NON_BLOCKING);
SYS_ASSERT(DRV_HANDLE_INVALID != handle,"Bad handle returned");
// Register a callback
DRV_USB_ClientEventCallBackSet(handle, (uintptr_t)&myDeviceLayer,
MyDeviceLayerEventCallback);
// Perform any other initialization here and then attach the device
// to the bus.
DRV_USB_DEVICE_Attach(handle);
}
5.1.12.7.5.4 DRV_USB_DEVICE_CurrentSpeedGet Function
C
USB_SPEED DRV_USB_DEVICE_CurrentSpeedGet(
DRV_HANDLE handle
);
Description
This function will return the USB speed at which device is operating.
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Preconditions
Only valid after device is attached to host.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
Returns
Returns a member of the USB_SPEED type.
Remarks
None.
Example
// Get the current speed.
USB_SPEED deviceSpeed;
deviceSpeed = DRV_USB_DEVICE_CurrentSpeedGet(deviceLayer);
if(deviceLayer == USB_SPEED_HIGH)
{
// Possibly adjust buffers for higher throughput.
}
5.1.12.7.5.5 DRV_USB_DEVICE_Detach Function
C
void DRV_USB_DEVICE_Detach(
DRV_HANDLE handle
);
Description
This function will detach the device from the USB. It does this by disabling the pull up resistors on the D+ or D- lines. This
function should be called when the application wants to disconnect the device from the bus (typically to implement a soft detach
or switch to host mode operation).
Preconditions
Client handle should be valid.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
Returns
None.
Remarks
None.
Example
// Detach the device from the USB
DRV_USB_DEVICE_Detach(handle);
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5.1.12.7.5.6 DRV_USB_DEVICE_EndpointDisable Function
C
USB_ERROR DRV_USB_DEVICE_EndpointDisable(
DRV_HANDLE handle,
USB_ENDPOINT endpointAndDirection
);
Description
This function disables an endpoint. If the endpoint type is control type then both directions are disabled. For non-control
endpoints, the function disables one direction at a time.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
endpointAndDirection Specifies the endpoint and direction.
Returns
USB_ERROR_NONE - The endpoint was successfully enabled. USB_ERROR_DEVICE_ENDPOINT_INVALID - If the endpoint
that is being accessed is is out of the valid endpoint defined for this driver instance.
Remarks
None.
Example
// This code snippet shows an example of how to disable
// a control endpoint. Note that the direction parameter is ignored.
// For a control endpoinnt, both the directions are disabled.
USB_ENDPOINT ep;
ep = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_DEVICE_TO_HOST, 0);
DRV_USB_DEVICE_EndpointDisable(handle, ep );
// This code snippet shows an example of how to disable a BULK IN
// endpoint
USB_ENDPOINT ep;
ep = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_DEVICE_TO_HOST, 1);
DRV_USB_DEVICE_EndpointDisable(handle, ep );
5.1.12.7.5.7 DRV_USB_DEVICE_EndpointDisableAll Function
C
USB_ERROR DRV_USB_DEVICE_EndpointDisableAll(
DRV_HANDLE handle
);
Description
This function disables all provisioned endpoints in both directions.
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Preconditions
Client handle should be valid.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
Returns
None.
Remarks
This function is typically called by the USB Device Layer to disable all endpoints on detecting bus reset.
Example
// This code snippet shows an example of how to disable
// all endpoints.
DRV_USB_DEVICE_EndpointDisableAll(handle);
5.1.12.7.5.8 DRV_USB_DEVICE_EndpointEnable Function
C
USB_ERROR DRV_USB_DEVICE_EndpointEnable(
DRV_HANDLE handle,
USB_ENDPOINT endpointAndDirection,
USB_TRANSFER_TYPE transferType,
uint16_t endpointSize
);
Description
This function enables a endpoint for the specified direction and endpoint size. The function will enable the endpoint for
communication in one direction at a time. It must be called twice if the endpoint is required to communicate in both the directions,
except for control endpoints. If the endpoint type is a control endpoint, the endpoint is always bi-directional and the function
needs to be called only once. The size of the endpoint must match the wMaxPacketSize reported in the endpoint descriptor for
this endpoint. The function does not check if the endpoint is already in use. It is the client's responsibility to make sure that a
endpoint is not accidently re-used.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
endpointAndDirection Specifies the endpoint and direction.
transferType Should be USB_TRANSFER_TYPE_CONTROL for control endpoint,
USB_TRANSFER_TYPE_BULK for bulk endpoint,
USB_TRANSFER_TYPE_INTERRUPT for interrupt endpoint and
USB_TRANSFER_TYPE_ISOCHRONOUS for isochronous endpoint.
endpointSize Maximum size (in bytes) of the endpoint as reported in the endpoint descriptor.
Returns
USB_ERROR_NONE - The endpoint was successfully enabled. USB_ERROR_DEVICE_ENDPOINT_INVALID - If the endpoint
that is being accessed is is out of the valid endpoint defined for this driver instance.
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Remarks
None.
Example
// This code snippet shows an example of how to enable endpoint
// 0 for control transfers. Note that for a control endpoint, the
// direction parameter is ignored. A control endpoint is always
// bi-directional. Endpoint sizeis 64 bytes.
uint8_t ep;
ep = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_DEVICE_TO_HOST, 0);
DRV_USB_DEVICE_EndpointEnable(handle, ep, USB_TRANSFER_TYPE_CONTROL, 64);
// This code snippet shows an example of how to set up a endpoint
// for BULK IN transfer. For an IN transfer, data moves from device
// to host. In this example, endpoint 1 is enabled. The maximum
// packet size is 64.
uint8_t ep;
ep = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_DEVICE_TO_HOST, 1);
DRV_USB_DEVICE_EndpointEnable(handle, ep, USB_TRANSFER_TYPE_BULK, 64);
// If endpoint 1 must also be set up for BULK OUT, then the enable
// function must be called again, as shown here.
ep = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_HOST_TO_DEVICE, 1);
DRV_USB_DEVICE_EndpointEnable(handle, ep, USB_TRANSFER_TYPE_BULK, 64);
5.1.12.7.5.9 DRV_USB_DEVICE_EndpointIsEnabled Function
C
bool DRV_USB_DEVICE_EndpointIsEnabled(
DRV_HANDLE client,
USB_ENDPOINT endpointAndDirection
);
Description
This function returns the enable/ disable status of the specified endpoint and direction.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
endpointAndDirection Specifies the endpoint and direction.
Returns
Returns true if the endpoint is enabled, false otherwise.
Remarks
None.
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Example
// This code snippet shows an example of how the
// DRV_USB_DEVICE_EndpointIsEnabled() function can be used to obtain the
// status of the endpoint 1 and IN direction.
USB_ENDPOINT ep;
ep = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_DEVICE_TO_HOST, 1);
if(DRV_USB_ENDPOINT_STATE_DISABLED ==
DRV_USB_DEVICE_EndpointIsEnabled(handle, ep))
{
// Endpoint is disabled. Enaable endpoint.
DRV_USB_DEVICE_EndpointEnable(handle, ep, USB_ENDPOINT_TYPE_BULK, 64);
}
5.1.12.7.5.10 DRV_USB_DEVICE_EndpointIsStalled Function
C
bool DRV_USB_DEVICE_EndpointIsStalled(
DRV_HANDLE client,
USB_ENDPOINT endpoint
);
Description
This function returns the stall status of the specified endpoint and direction.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
endpointAndDirection Specifies the endpoint and direction.
Returns
Returns true if endpoint is stalled, false otherwise.
Remarks
None.
Example
// This code snippet shows an example of how the
// DRV_USB_DEVICE_EndpointIsStalled() function can be used to obtain the
// stall status of the endpoint 1 and IN direction.
USB_ENDPOINT ep;
ep = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_DEVICE_TO_HOST, 1);
if(true == DRV_USB_DEVICE_EndpointIsStalled (handle, ep))
{
// Endpoint stall is enabled. Clear the stall.
DRV_USB_DEVICE_EndpointStallClear(handle, ep);
}
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5.1.12.7.5.11 DRV_USB_DEVICE_EndpointStall Function
C
USB_ERROR DRV_USB_DEVICE_EndpointStall(
DRV_HANDLE handle,
USB_ENDPOINT endpointAndDirection
);
Description
This function stalls an endpoint in the specified direction.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
endpointAndDirection Specifies the endpoint and direction.
Returns
USB_ERROR_NONE - The endpoint was successfully enabled. USB_ERROR_DEVICE_ENDPOINT_INVALID - If the endpoint
that is being accessed is is out of the valid endpoint defined for this driver instance.
Remarks
None.
Example
// This code snippet shows an example of how to stall an endpoint. In
// this case , endpoint 1 IN direction is stalled.
USB_ENDPOINT ep;
ep = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_DEVICE_TO_HOST, 1);
DRV_USB_DEVICE_EndpointStall(handle, ep);
5.1.12.7.5.12 DRV_USB_DEVICE_EndpointStallClear Function
C
USB_ERROR DRV_USB_DEVICE_EndpointStallClear(
DRV_HANDLE handle,
USB_ENDPOINT endpointAndDirection
);
Description
This function clears the stall on an endpoint in the specified direction.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
endpointAndDirection Specifies the endpoint and direction.
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Returns
USB_ERROR_NONE - The endpoint was successfully enabled. USB_ERROR_DEVICE_ENDPOINT_INVALID - If the endpoint
that is being accessed is is out of the valid endpoint defined for this driver instance.
Remarks
None.
Example
// This code snippet shows an example of how to clear a stall. In this
// example. the stall on endpoint 1 IN direction is cleared.
USB_ENDPOINT ep;
ep = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_DEVICE_TO_HOST, 1);
DRV_USB_DEVICE_EndpointStallClear(handle, ep);
5.1.12.7.5.13 DRV_USB_DEVICE_IRPCancelAll Function
C
USB_ERROR DRV_USB_DEVICE_IRPCancelAll(
DRV_HANDLE client,
USB_ENDPOINT endpointAndDirection
);
Description
This function cancels all IRPs that are queued and in progress at the specified endpoint.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
endpointAndDirection Specifies the endpoint and direction.
Returns
USB_ERROR_NONE - The endpoint was successfully enabled. USB_ERROR_DEVICE_ENDPOINT_INVALID - If the endpoint
that is being accessed is is out of the valid endpoint defined for this driver instance.
Remarks
None.
Example
// This code snippet shows an exampl of how to cancel all IRPs.
void MyIRPCallback(USB_DEVICE_IRP * irp)
{
// Check if this is setup command
if(irp->status == USB_DEVICE_IRP_STATUS_SETUP)
{
if(IsSetupCommandSupported(irp->data) == false)
{
// This means that this setup command is not
// supported. Stall the endpoint.
DRV_USB_DEVICE_IRPCancelAll(handle, ep);
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DRV_USB_DEVICE_EndpointStall(handle, ep);
}
}
}
5.1.12.7.5.14 DRV_USB_DEVICE_IRPSubmit Function
C
USB_ERROR DRV_USB_DEVICE_IRPSubmit(
DRV_HANDLE client,
USB_ENDPOINT endpointAndDirection,
USB_DEVICE_IRP * irp
);
Description
This function submits a I/O Request Packet (IRP) for processing to the USB Driver. The IRP allows a client to send and receive
data from the USB Host. The data will sent or received through the specified endpoint. The direction of the data transfer is
indicated by the direction flag in the endpointAndDirection structure. Submitting an IRP arms the endpoint to either send data to
or receive data from the host. If an IRP is under progress on the endpoint, then the subsequent IRP submit operation will result
in the IRPs getting queued. The contents of the IRP should not be changed till the IRP has been processed.
Particular attention should be paid to the size parameter of IRP. The following should be noted:
• The size parameter while sending data to the host can be less than, greater than, equal to or be an exact multiple of
maximum packet size for the endpoint. The maximum packet size for the endpoint determines the number of transactions
required to process the IRP.
• If the size parameter while sending data to the host is less than maximum packet size, the transfer will complete in one
transaction.
• If the size parameter while sending data to the host is greater than maximum packet size, the IRP will be processed in
mulitple transactions.
• If the size parameter while sending data to the host is equal to or an exact multiple of the maximum packet size, the client can
optionally ask the driver to send a Zero Length packet by specifying the USB_DEVICE_IRP_FLAG_DATA_COMPLETE flag
as the flag parameter.
• The size parameter while receiving data from the host must be an exact multiple of the maximum packet size of the endpoint.
If this is not the case, the driver will return a USB_ERROR_IRP_SIZE_INVALID result. If while processing the IRP, the driver
receives less than maximum packet size or a ZLP from the host, the driver considers the IRP as processed. The size
paramter at this point contains the actual amount of data received from the host. The IRP status is returned as
USB_DEVICE_IRP_STATUS_COMPLETED_SHORT.
• If a ZLP needs to be sent to host, the IRP size should be specified as 0 and flag should be set as
USB_DEVICE_IRP_FLAG_DATA_COMPLETE.
• If the IRP size is an exact multiple of endpoint size, the client can request the driver to not send a ZLP, by specifying the
USB_DEVICE_IRP_FLAG_DATA_PENDING. This flag indicates that there is more data pending in this transfer.
• Specifying a size less than endpoint size along with the USB_DEVICE_IRP_FLAG_DATA_PENDING flag will cause the driver
to return a USB_ERROR_IRP_SIZE_INVALID.
• If the size id greater than endpoint size, and the flag is specified as USB_DEVICE_IRP_FLAG_DATA_PENDING, the driver
will send multiple of endpoint size data.
Preconditions
Client handle should be valid.
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Parameters
Parameters Description
handle Client's driver handle (returned from DRV_USB_Open)
endpointAndDirection Specifies the endpoint and direction.
irp Pointer to the USB_DEVICE_IRP structure.
Returns
USB_ERROR_NONE - if the IRP was submitted successful. USB_ERROR_IRP_SIZE_INVALID - if the size parameter of the
IRP is not correct. USB_ERROR_IRP_QUEUE_FULL - if the driver IRP queue is full.
Remarks
None.
Example
// The following code snippet shows an example of how to schedule a
// IRP to send data from device to host. Assume that max packet size
// is 64 and endpoint is 1. In this example, the transfer is
// processed as 3 transactions of 64, 64 and 2 bytes.
USB_ENDPOINT ep;
USB_DEVICE_IRP irp;
ep.direction = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_DEVICE_TO_HOST, 1);
irp.data = myDataBufferToSend;
irp.size = 130;
irp.flags = USB_DEVICE_IRP_FLAG_DATA_COMPLETE;
irp.callback = MyIRPCompletionCallback;
irp.referenceData = (uintptr_t)&myDeviceLayerObj;
if (DRV_USB_DEVICE_IRPSubmit(handle, ep, irp)
!= USB_ERROR_NONE)
{
// This means there was an error.
}
else
{
// The status of the IRP can be checked.
while(irp.status != USB_DEVICE_IRP_STATUS_COMPLETED)
{
// Wait or run a task routine.
}
}
// The following code snippet shows how the client can request
// the driver to send a ZLP when the size is an exact multiple of
// end point size.
irp.data = myDataBufferToSend;
irp.size = 128;
irp.flags = USB_DEVICE_IRP_FLAG_DATA_COMPLETE;
irp.callback = MyIRPCompletionCallback;
irp.referenceData = (uintptr_t)&myDeviceLayerObj;
// Note that while receiving data from the host, the size should
// be an exact multiple maximum packet size of the endpoint. In the
// example below, the DRV_USB_DEVICE_IRPSubmit() function will
// return a USB_DEVICE_IRP_SUBMIT_RESULT_INVALID_SIZE value.
ep = USB_ENDPOINT_AND_DIRECTION(USB_DATA_DIRECTION_HOST_TO_DEVICE, 1);
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irp.data = myDataBufferToSend;
irp.size = 60; // THIS SIZE IS NOT CORRECT
irp.flags = USB_DEVICE_IRP_FLAG_DATA_COMPLETE;
irp.callback = MyIRPCompletionCallback;
irp.referenceData = (uintptr_t)&myDeviceLayerObj;
5.1.12.7.5.15 DRV_USB_HOST_BusResetControl Function
C
void DRV_USB_HOST_BusResetControl(
DRV_HANDLE client,
bool control
);
Description
This is function DRV_USB_HOST_BusResetControl.
5.1.12.7.5.16 DRV_USB_HOST_DeviceCurrentSpeedGet Function
C
USB_SPEED DRV_USB_HOST_DeviceCurrentSpeedGet(
DRV_HANDLE client
);
Description
This is function DRV_USB_HOST_DeviceCurrentSpeedGet.
5.1.12.7.5.17 DRV_USB_HOST_IRPCancel Function
C
void DRV_USB_HOST_IRPCancel(
USB_HOST_IRP * inputIRP
);
Description
This is function DRV_USB_HOST_IRPCancel.
5.1.12.7.5.18 DRV_USB_HOST_IRPSubmit Function
C
USB_ERROR DRV_USB_HOST_IRPSubmit(
DRV_USB_HOST_PIPE_HANDLE hPipe,
USB_HOST_IRP * inputIRP
);
Description
This is function DRV_USB_HOST_IRPSubmit.
5.1.12.7.5.19 DRV_USB_HOST_OperationEnable Function
C
void DRV_USB_HOST_OperationEnable(
DRV_HANDLE hClient,
bool enable
);
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Description
This is function DRV_USB_HOST_OperationEnable.
5.1.12.7.5.20 DRV_USB_HOST_StartOfFrameControl Function
C
void DRV_USB_HOST_StartOfFrameControl(
DRV_HANDLE client,
bool control
);
Description
This is function DRV_USB_HOST_StartOfFrameControl.
5.1.12.7.5.21 DRV_USB_HOST_TimerIsComplete Function
C
bool DRV_USB_HOST_TimerIsComplete(
DRV_HANDLE client
);
Description
This is function DRV_USB_HOST_TimerIsComplete.
5.1.12.7.5.22 DRV_USB_HOST_TimerReset Function
C
void DRV_USB_HOST_TimerReset(
DRV_HANDLE client
);
Description
This is function DRV_USB_HOST_TimerReset.
5.1.12.7.5.23 DRV_USB_HOST_TimerStart Function
C
bool DRV_USB_HOST_TimerStart(
DRV_HANDLE client,
uint32_t periodInMilliseconds
);
Description
This is function DRV_USB_HOST_TimerStart.
5.1.12.7.5.24 DRV_USB_Tasks Function
C
void DRV_USB_Tasks(
SYS_MODULE_OBJ object
);
Description
Maintains the driver's state machine when the driver is configured for polled mode. This function should be called from the
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system tasks routine.
Preconditions
The DRV_USB_Initialize routine must have been called for the specified USB driver instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from DRV_USB_Initialize)
Returns
None
Remarks
This routine is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks). This function
will never block.
Example
SYS_MODULE_OBJ object; // Returned from DRV_USB_Initialize
while (true)
{
DRV_USB_Tasks(object);
// Do other tasks
}
5.1.12.7.6 Data Types and Constants
5.1.12.7.6.1 DRV_USB_ENDPOINT_TABLE_ENTRY_SIZE Macro
C
#define DRV_USB_ENDPOINT_TABLE_ENTRY_SIZE
5.1.12.7.6.2 DRV_USB_HOST_PIPE_HANDLE_INVALID Macro
C
#define DRV_USB_HOST_PIPE_HANDLE_INVALID ((DRV_USB_HOST_PIPE_HANDLE)(-1))
Description
USB Driver Host Pipe Handle Invalid
Defines the USB Driver Host Pipe Invalid handle
Remarks
None.
5.1.12.7.6.3 DRV_USB_INDEX Macro
C
#define DRV_USB_INDEX 0
Description
This is macro DRV_USB_INDEX.
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5.1.12.7.6.4 DRV_USB_INDEX_0 Macro
C
#define DRV_USB_INDEX_0 0
Description
USB Driver Module Index Numbers
These constants provide USB driver index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals and should be passed into the DRV_USB_Initialize and
DRV_USB_Open routines to identify the driver instance in use. These are not indicative of the number of modules that are
actually supported by the microcontroller.
5.1.12.7.6.5 DRV_USB_INTERRUPT_SOURCE Macro
C
#define DRV_USB_INTERRUPT_SOURCE INT_SOURCE_USB_1
Description
This is macro DRV_USB_INTERRUPT_SOURCE.
5.1.12.7.6.6 DRV_USB_PERIPHERAL_ID Macro
C
#define DRV_USB_PERIPHERAL_ID USB_ID_1
Description
This is macro DRV_USB_PERIPHERAL_ID.
5.1.12.7.6.7 DRV_USB_EVENT Enumeration
C
typedef enum {
DRV_USB_EVENT_ERROR = 1,
DRV_USB_EVENT_RESET_DETECT,
DRV_USB_EVENT_RESUME_DETECT,
DRV_USB_EVENT_IDLE_DETECT,
DRV_USB_EVENT_STALL,
DRV_USB_EVENT_SOF_DETECT,
DRV_USB_EVENT_HOST_ATTACH,
DRV_USB_EVENT_HOST_DETACH
} DRV_USB_EVENT;
Description
USB Driver Events Enumeration
Identifies the different events that the USB Driver provides.
Members
Members Description
DRV_USB_EVENT_ERROR = 1 Bus error occurred and was reported
DRV_USB_EVENT_RESET_DETECT Host has issued a device reset
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DRV_USB_EVENT_RESUME_DETECT Resume detected while USB in suspend mode
DRV_USB_EVENT_IDLE_DETECT Idle detected
DRV_USB_EVENT_STALL Stall handshake has occurred
5.1.12.7.6.8 DRV_USB_EVENT_CALLBACK Type
C
typedef void (* DRV_USB_EVENT_CALLBACK)(uintptr_t hClient, DRV_USB_EVENT eventType, void *
eventData);
Description
Type of the USB Event Callback Function
Type of the USB event callback function. The client should register an event callback function of this type when it intends to
receive events from the USB driver. The event callback function is registered using the DRV_USB_ClientEventCallBackSet()
function.
Parameters
Parameters Description
hClient handle to driver client that registered this callback function.
eventType Event type
eventData Event relevant data.
Returns
None.
Remarks
None.
5.1.12.7.6.9 DRV_USB_HOST_PIPE_HANDLE Type
C
typedef uintptr_t DRV_USB_HOST_PIPE_HANDLE;
Description
USB Driver Host Pipe Handle
Defines the USB Driver Host Pipe handle type
Remarks
None.
5.1.12.7.6.10 DRV_USB_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
USB_MODULE_ID usbID;
bool stopInIdle;
bool suspendInSleep;
INT_SOURCE interruptSource;
USB_SPEED operationSpeed;
USB_OPMODES operationMode;
void * endpointTable;
} DRV_USB_INIT;
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Description
USB Device Driver Initialization Data
This structure contains all the data necessary to initialize the USB driver.
Members
Members Description
SYS_MODULE_INIT moduleInit; System module initialization
USB_MODULE_ID usbID; Identifies peripheral (PLIB-level) ID
bool stopInIdle; Boolean flag: true -> Stop USB module in Idle Mode
bool suspendInSleep; Boolean flag: true -> Suspend USB in Sleep Mode
INT_SOURCE interruptSource; Interrupt Source for USB module
USB_SPEED operationSpeed; USB Operation speed
USB_OPMODES operationMode; USB module operating mode
void * endpointTable; Endpoint Descriptor Table buffer
Remarks
A pointer to a structure of this format containing the desired initialization data must be passed into the DRV_USB_Initialize
routine.
5.1.12.8 Files
Files
Name Description
drv_usb.h USB Device Driver Interface File
drv_usb_config_template.h USB driver configuration definitions template
Description
5.1.12.8.1 drv_usb.h
USB Device Driver Interface
The USB device driver provides a simple interface to manage the "USB" peripheral. This file defines the interface definitions and
prototypes for the USB driver.
Enumerations
Name Description
DRV_USB_EVENT Identifies the different events that the USB Driver provides.
Functions
Name Description
DRV_USB_ClientEventCallBackSet This function sets up the event callback function that is invoked by the
USB controller driver to notify the a client of USB bus events.
DRV_USB_Close Closes an opened-instance of the USB driver
DRV_USB_DEVICE_AddressSet This function will set the USB module address that is obtained from
the host.
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DRV_USB_DEVICE_Attach This function will attach the device to the USB.
DRV_USB_DEVICE_CurrentSpeedGet This function will return the USB speed at which device is operating.
DRV_USB_DEVICE_Detach This function will detach the device from the USB.
DRV_USB_DEVICE_EndpointDisable This function disables an endpoint.
DRV_USB_DEVICE_EndpointDisableAll This function disables all provisioned non-zero endpoints.
DRV_USB_DEVICE_EndpointEnable This function enables a endpoint for the specified direction and
endpoint size.
DRV_USB_DEVICE_EndpointIsEnabled This function returns the enable/ disable status of the specified
endpoint and direction.
DRV_USB_DEVICE_EndpointIsStalled This function returns the stall status of the specified endpoint and
direction.
DRV_USB_DEVICE_EndpointStall This function stalls an endpoint in the specified direction.
DRV_USB_DEVICE_EndpointStallClear This function clears the stall on an endpoint in the specified direction.
DRV_USB_DEVICE_IRPCancelAll This function cancels all IRPs that are queued and in progress at the
specified endpoint.
DRV_USB_DEVICE_IRPSubmit This function submits a I/O Request Packet (IRP) for processing to
the USB Driver.
DRV_USB_HOST_BusResetControl This is function DRV_USB_HOST_BusResetControl.
DRV_USB_HOST_DeviceCurrentSpeedGet This is function DRV_USB_HOST_DeviceCurrentSpeedGet.
DRV_USB_HOST_IRPCancel This is function DRV_USB_HOST_IRPCancel.
DRV_USB_HOST_IRPSubmit This is function DRV_USB_HOST_IRPSubmit.
DRV_USB_HOST_OperationEnable This is function DRV_USB_HOST_OperationEnable.
DRV_USB_HOST_OperationIsEnabled This is function DRV_USB_HOST_OperationIsEnabled.
DRV_USB_HOST_PipeClose This is function DRV_USB_HOST_PipeClose.
DRV_USB_HOST_PipeSetup This is function DRV_USB_HOST_PipeSetup.
DRV_USB_HOST_StartOfFrameControl This is function DRV_USB_HOST_StartOfFrameControl.
DRV_USB_HOST_TimerIsComplete This is function DRV_USB_HOST_TimerIsComplete.
DRV_USB_HOST_TimerReset This is function DRV_USB_HOST_TimerReset.
DRV_USB_HOST_TimerStart This is function DRV_USB_HOST_TimerStart.
DRV_USB_Initialize Initializes the USB driver
DRV_USB_Open Opens the specified USB driver instance and returns a handle to it
DRV_USB_Status Provides the current status of the USB driver module
DRV_USB_Tasks Maintains the driver's state machine when the driver is configured for
polled mode.
DRV_USB_Tasks_ISR Maintains the driver's state machine and implements its ISR
Macros
Name Description
DRV_USB_ENDPOINT_TABLE_ENTRY_SIZE
DRV_USB_HOST_PIPE_HANDLE_INVALID Defines the USB Driver Host Pipe Invalid handle
DRV_USB_INDEX_0 USB driver index definitions
Structures
Name Description
DRV_USB_INIT Contains all the data necessary to initialize the USB device
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Types
Name Description
DRV_USB_EVENT_CALLBACK Type of the USB event callback function
DRV_USB_HOST_PIPE_HANDLE Defines the USB Driver Host Pipe handle type
Company
Microchip Technology Incorported
FileName: drv_usb.h
5.1.12.8.2 drv_usb_config_template.h
USB Driver Configuration Definitions for the template version
These definitions statically define the driver's mode of operation.
Macros
Name Description
DRV_USB_INDEX This is macro DRV_USB_INDEX.
DRV_USB_INTERRUPT_SOURCE This is macro DRV_USB_INTERRUPT_SOURCE.
DRV_USB_PERIPHERAL_ID This is macro DRV_USB_PERIPHERAL_ID.
File Name
drv_usb_config_template.h
Company
Microchip Technology Incorported
5.1.13 MRF24W Wi-Fi Driver Library
MRF24W Wi-Fi Driver Library
for
Microchip Microcontrollers
This library provides an interface to manage the Wi-Fi module on the MRF24W family of Microchip microcontrollers in different
modes of operation.
Description
Content pending.
5.1.13.1 Introduction
MRF24W Wi-Fi Driver Library
for
Microchip Microcontrollers
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This library provides a low-level abstraction of the MRF24W Wi-Fi Driver Library that is available on the Microchip family of
microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module without the
necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller variant to
another.
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
5.1.13.2 Release Notes
MPLAB Harmony Version: v0.70b MRF24W Wi-Fi Driver Library Version : 3.0.0 Release Date: 18Nov2013
New This Release:
Nothing to report in this release.
Known Issues:
• No W-iFi demonstrations are available for PIC32MZ
• Webserver demonstration:
• Mpfsupload of image requires system boot upon completion
• EasyConfig Demonstration (Explorer 16 Development Board and PIC32 Ethernet Starter Kit)
• Mpfsupload of image requires system boot upon completion
• Ad-Hoc mode – cannot retrieve scan info/cannot redirect network
• Security (minor problem)
• WEP Shared Key is not supported
• Stack
• Heap memory leak
• TCP network traffic (Max TX Packet error detect)
• Heap allocation failure
• Services not verified
• DNS Server
• DNS Client
• Dynamic DNS
• Zero Conf
• IPv6
• SNMPv1, SNMP2, SNMP3
• FTP
• Data throughput in open air (throughput is still lower than v5 stack)
• IPerf TCP RX/TX (320/102 Kbps)
• IPerf UDP RX/TX (570/468 Kbps)
5.1.13.2.1 v0.51.01b
Release notes for MRF24WG Wi-Fi Driver v0.51.01b
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Description
Due to a special circumstance for this release the MRF24WG Wi-Fi driver will compile and work with legacy peripheral drivers
(plib.h), and not with the MPLAB Harmony peripheral (peripheral.h). This MRF24WG Wi-F idriver compiling issue will be fixed in
a future release. Applications can still take advantage of the V6 stack features and services in this B1U dot release, along with
Wi-Fi connectivity.
Known Issues:
1) Stack ASSERT condition while waiting for RAW_MOVE_TO_COMPLETE
2) Web Server Demo hang or irresponsive to HTTP query
Software Requirements:
(1) MPLAB X IDE 1.80
(2) XC32 compiler v1.21 and later
Applicable Product:
(1) MRF24WG
Supported Application Demos:
(1) Web Server Demo
a. SNMPv3, multi-port connection (Ethernet + Wi-Fi)
b. Network type supported: Infrastructure (Client STA)
c. Security mode supported: Open , WEP 64/128 Open, WPS, WPA/WPA2 PSK TKIP/AES
Project Files:
To run with Explorer 16 Development Board (EX16)
Directory folder - “.\apps\tcpip\web_server\firmware\pic32_ex16.X”
To run with PIC32 IO Expansion Board with Ethernet Starter Kit (ESK)
Directory folder - “.\apps\tcpip\web_server\firmware\pic32_esk_mrf24w.X”
(2) Console Demo
a. Network benchmark debug/test support such as iPerf, etc via system command line access.
b. Network type supported: Infrastructure (Client STA), Ad-Hoc, Wi-Fi Direct
If testing Wifi-Direct, use RF module FW version 0x3107.
RF module FW version 0x3108 does NOT have support for Wi-Fi Direct.
Project File:
To run with Explorer 16 Development Board (EX16)
Directory
“.\apps\tcpip\wifi_console\firmware\pic32_ex16_mrf24w.X”
(3) EasyConfig Demo
a. Network provision allowing configurations of an embedded decide on a wireless network. (SoftAP, Ad-Hoc)
b. Network type supported: SoftAP, Ad-Hoc
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Project File:
To run with Explorer 16 Development Board (EX16)
Directory
“.\apps\tcpip\wifi_easyconf\firmware\pic32_ex16.X”
Key Features:
Verified:
(1) SNMPv3
(2) DHCP Server/Client - server supports up to max 4 IPs
(3) SoftAP is able to support up to max 4 clients (STAs)
Requires RF module FW version 0x3108.
RF module FW version 0x3107 only supports 1 client for SoftAP.
(4) Ad-Hoc network with support for up to max 4 STAs
(5) Multi-Ethernet ports (Ethernet and Wi-Fi)
(6) Serial console 115,200 baud
Supported:
(1) ZeroConfig/Bonjour (with mDNS)
(2) SNMP v1, 2c, v3
(3) SMTP
(4) SSL (512, 1024, 2048-bit)
(5) HTTP2
(6) ICMP
(7) DNS
(8) NBNS
(9) Iperf
(10) TCP/UDP modules
(11) TCPIP Network Commands
(12) TCPIP Storage Service
(13) Announce
(14) ARP (Gratuitous)
(15) Berkeley API
(16) ZeroConfig/Bonjour (with mDNS)
(17) Power management / Power Save
• Active mode (Known as normal mode in v5 stack)
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• Doze mode (Known as PS-Polling mode in v5 stack)
Supported But Not Verified:
(1) Telnet
(2) TFTP
(3) SNTP
(4) Reboot Server
(5) IPV6 : This is currently not supported due to a defect of software multicast filter of MRF24WG 3107 or the older FW. The
problem will be fixed with upcoming 3108 FW, and thereby the IPv6 will get supported for Wi-Fi.
(6) FTP
To test ESK board:
• Ethernet Starter Kit (ESK) is valid for Web server demo
• ESK + MRF24WG
• Please note that in order to use the MRF24WG module with the PIC32ESK you need to use an I/O Expansion board
(DM320002) and insert the MRF24WG module in one of the PICtail Plus slots (SPI1 position is the default).
• You need to connect the J10/PMPA4/56 and J10/INT1/37 pins on the I/O Expansion board so that the MRF24WG interrupt
signal reaches the PIC32 processor. For this configuration the MRF24WG driver uses a CN (change notice) interrupt.
5.1.13.2.2 v0.51b
Release notes for MRF24WG Wi-Fi driver v0.51b.
Description
V6 MPLAB Harmony (v0.51b) Beta Release is limited release to demonstrate V6 stack capabilities, and was verified on one
Development Board:
(1) Explorer16 Development Board, with PIC32MX795F512L PIM, and MRF24WG PICtail (FW 0x3108 only)
There are two Application Demos included to demonstrate some Stack services:
(1) Web Server Demo (Infrastructure mode)
(2) EasyConfig Demo (SoftAP and Ad-Hoc modes)
a. Over-air system configuration
For development work and running the above Demos, will require:
(1) MPLAB X IDE v1.85
(2) XC32 compiler v1.21 or later
(3) MPLAB ICD 3
(4) Windows XP SP3 or 7 PC with serial port, USB port.
(5) Development boards mentioned above.
(6) And MLA Stack V6 Harmony (MPLAB Harmony v0_51b) Beta Release package.
Specific V6 Beta Stack features supported and demonstration included: (verified)
(1) SoftAP with support for 4 STA Clients.
(2) DHCP Server/Client. DHCP Server supports up to 4 clients.
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(3) Ad-Hoc network with support for up to 4 STAs (joiners).
(4) Wi-Fi over-air system configuration
(5) MRF24G supporting 802.11b/g mixed
(6) 115,200 baud SPI interface
(7) MPLAB X IDE and X32C compiler
(8) ZeroConfig/Bonjour (with mDNS)
Other V6 Stack services: (included, verified)
(1) IPV4
(2) IPV6 (with Ping only)
(3) SMTP
(4) SSL (512, 1024, 2048-bit)
(5) HTTP
(6) ICMP
(7) NBNS
(8) IPerf
(9) ARP (Gratuitous)
(10) TCP/UDP modules
(11) TCPIP Network Commands
(12) TCPIP Storage Service
Other V6 Stack services: (included, NOT VERIFIED)
(1) SNMP v1, 2c
(2) SNMPv3
(3) SNTP
(4) DNS Client/Server
(5) Telnet
(6) FTP
(7) TFTP
(8) Announce
(9) AutoIP
(10) Berkeley API
(11) Reboot Server
Specific Stack/Wi-Fi Connection Agent supports:
(1) Wi-Fi Specific Features:
a. ENABLE_SOFTWARE_MULTICAST_FILTER
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b. RETRIEVE_BINARY_KEY (not support in Beta)
c. SAVE_WPS_CONFIDENTIALS (not support in Beta)
d. DISABLE_MODULE_FW_CONNECT_MANAGER_IN_INFRASTRUCTURE
e. DERIVE_KEY_FROM_PASSPHRASE_IN_HOST
f. MY_DEFAULT_MAC_ADDRESS
(2) Network Type:
a. 802.11 b/g mixed
b. 802.11 b-only
c. 802.11 legacy
(3) Network Mode:
a. Infrastructure (Open , WEP 64/128 Open/Shared Key), WPS, WPA/WPA2 PSK TKIP/AES)
b. Ad-Hoc (Open, WEP 64/128 Open/Shared Key)
c. SoftAP (Open, WEP 64/128 Open Key)
(4) Power Save
a. Normal
b. PS-Poll
MLA STACK V6 MPLAB Harmony (v0.51b) Beta Release PACKAGE
DEMO APPLICATION & MICROCHIP DEVELOPMENT BOARD
Single Port (Wi-Fi only) - WEB Server and EasyConfig Demos
Development Board Configuration:
Explorer16 Development Board
MRF24WG PICtail (FW 0x3108 only)
PIC32MX795F512L PIM
WEB Server Demo project:
“…\software\isp_root\apps\tcpip\tcpip_web_server_demo_app\firmware\pic32_ex16.X”
EasyConfig Demo project:
“…\software\isp_root\apps\tcpip\tcpip_wifi_easyconfig_app\firmware\pic32_ex16.X”
DEMO CONFIGURATION
Refer to WF_Config.h and TCPIP_Config.h files in respective MPLAB X IDE demo project for network configuration and setup
information.
5.1.13.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
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licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.1.13.4 Using the Library
This topic describes the basic architecture of the MRF24W Wi-Fi Driver Library and provides information and examples on how
to use it.
Interface Header File: drv_wifi.h
The interface to the ADC Driver Library is defined in the "drv_wifi.h" header file.
Please refer to the MPLAB Harmony Overview for how the driver interacts with the framework.
5.1.13.4.1 Abstraction Model
This library provides a low-level abstraction of the Wi-Fi module on Microchip's microcontrollers with a convenient C language
interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
Description
Content pending.
5.1.13.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various sub-sections, each sub-section addresses one of the blocks or the overall
operation of the Wi-Fi module.
Library Interface
Section
Description
System Functions and
System Configuration
Functions
Provides system module interfaces, device initialization, deinitialization, re-initialization, tasks, and
status functions.
Miscellaneous Provides driver miscellaneous functions, version identification functions etc.
5.1.13.4.3 How the Library Works
This section describes how the Wi-Fi Driver Library operates.
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Description
Before the driver is ready for use, its should be configured (compile time configuration). Refer to the Configuring the Library
section for more details on how to configure the driver.
There are few run-time configuration items that are done during initialization of the driver instance, and a few that are
client-specific and are done using dedicated functions.
To use the Wi-Fi Driver, initialization and client functions should be invoked in a specific sequence to ensure correct operation.
The following is the sequence in which various routines should be called:
Content pending.
5.1.13.4.3.1 System Initialization
This section describes initialization and reinitialization features.
Description
Content pending.
5.1.13.4.3.2 Client Functionality
This section describes core operation.
Description
Content pending.
5.1.13.4.3.3 Other Functionality
This section describes other functionality.
Description
Content pending.
5.1.13.5 Configuring the Library
The configuration of the MRF24W Wi-Fi driver is based on the file drv_wifi_config.h
This header file contains the configuration selection for the Wi-Fi Driver. Based on the selections made, the Wi-Fi Driver will
support or not support selected features. These configuration settings will apply to all instances of the Wi-Fi Driver.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.1.13.5.1 Initialization Overrides
Drag and Drop Initialization overrides
5.1.13.5.2 Files
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5.1.13.5.3 Others
Drag and Drop other configuration options
5.1.13.5.4 Examples - Sample Functionality
Drag the example configuration header file.
5.1.13.6 Building the Library
This section list the files that are available in the \src of the MRF24W Wi-Fi driver. It lists which files need to be included in the
build based on either a hardware feature present on the board or configuration option selected by the system.
5.1.13.7 Library Interface
Data Types and Constants
Name Description
DRV_WIFI_BSSID_LENGTH This is macro DRV_WIFI_BSSID_LENGTH.
DRV_WIFI_DEAUTH_REASONCODE_MASK This is macro
DRV_WIFI_DEAUTH_REASONCODE_MASK.
DRV_WIFI_DEFAULT_ADHOC_BEACON_PERIOD ms
DRV_WIFI_DEFAULT_ADHOC_HIDDEN_SSID Default values for WiFi AdHoc settings
DRV_WIFI_DEFAULT_ADHOC_MODE This is macro
DRV_WIFI_DEFAULT_ADHOC_MODE.
DRV_WIFI_DEFAULT_PS_DTIM_ENABLED DTIM wake-up enabled (normally the case)
DRV_WIFI_DEFAULT_PS_DTIM_INTERVAL number of beacon periods
DRV_WIFI_DEFAULT_PS_LISTEN_INTERVAL 100ms multiplier, e.g. 1 * 100ms = 100ms
DRV_WIFI_DEFAULT_SCAN_COUNT Default values for WiFi scan context
DRV_WIFI_DEFAULT_SCAN_MAX_CHANNEL_TIME ms
DRV_WIFI_DEFAULT_SCAN_MIN_CHANNEL_TIME ms
DRV_WIFI_DEFAULT_SCAN_PROBE_DELAY us
DRV_WIFI_DEFAULT_WEP_KEY_TYPE see DRV_WIFI_SecurityWepSet() and
DRV_WIFI_WEP_CONTEXT
DRV_WIFI_DISABLED Do not make this an enumerated type!
DRV_WIFI_DISASSOC_REASONCODE_MASK This is macro
DRV_WIFI_DISASSOC_REASONCODE_MASK.
DRV_WIFI_ENABLED This is macro DRV_WIFI_ENABLED.
DRV_WIFI_MAX_CHANNEL_LIST_LENGTH This is macro
DRV_WIFI_MAX_CHANNEL_LIST_LENGTH.
DRV_WIFI_MAX_NUM_RATES This is macro DRV_WIFI_MAX_NUM_RATES.
DRV_WIFI_MAX_SECURITY_KEY_LENGTH This is macro
DRV_WIFI_MAX_SECURITY_KEY_LENGTH.
DRV_WIFI_MAX_SSID_LENGTH This is macro DRV_WIFI_MAX_SSID_LENGTH.
DRV_WIFI_MAX_WEP_KEY_LENGTH This is macro
DRV_WIFI_MAX_WEP_KEY_LENGTH.
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DRV_WIFI_MAX_WPA_PASS_PHRASE_LENGTH must include string terminator
DRV_WIFI_MAX_WPA2_PASS_PHRASE_LENGTH This is macro
DRV_WIFI_MAX_WPA2_PASS_PHRASE_LENGT
H.
DRV_WIFI_MIN_WPA_PASS_PHRASE_LENGTH Key size defines
DRV_WIFI_NETWORK_TYPE_ADHOC This is macro
DRV_WIFI_NETWORK_TYPE_ADHOC.
DRV_WIFI_NETWORK_TYPE_INFRASTRUCTURE Selection of different WiFi network types
DRV_WIFI_NETWORK_TYPE_P2P not supported
DRV_WIFI_NETWORK_TYPE_SOFT_AP This is macro
DRV_WIFI_NETWORK_TYPE_SOFT_AP.
DRV_WIFI_NO_ADDITIONAL_INFO eventInfo define for DRV_WIFI_ProcessEvent()
when no additional info is supplied
DRV_WIFI_RETRY_ADHOC This is macro DRV_WIFI_RETRY_ADHOC.
DRV_WIFI_RETRY_FOREVER This is macro DRV_WIFI_RETRY_FOREVER.
DRV_WIFI_RTS_THRESHOLD_MAX maximum RTS threshold size in bytes
DRV_WIFI_SECURITY_EAP This is macro DRV_WIFI_SECURITY_EAP.
DRV_WIFI_SECURITY_OPEN Selection of different WiFi security types
DRV_WIFI_SECURITY_WEP_104 This is macro DRV_WIFI_SECURITY_WEP_104.
DRV_WIFI_SECURITY_WEP_40 This is macro DRV_WIFI_SECURITY_WEP_40.
DRV_WIFI_SECURITY_WPA_AUTO_WITH_KEY This is macro
DRV_WIFI_SECURITY_WPA_AUTO_WITH_KEY.
DRV_WIFI_SECURITY_WPA_AUTO_WITH_PASS_PHRASE This is macro
DRV_WIFI_SECURITY_WPA_AUTO_WITH_PASS
_PHRASE.
DRV_WIFI_SECURITY_WPA_WITH_KEY This is macro
DRV_WIFI_SECURITY_WPA_WITH_KEY.
DRV_WIFI_SECURITY_WPA_WITH_PASS_PHRASE This is macro
DRV_WIFI_SECURITY_WPA_WITH_PASS_PHRA
SE.
DRV_WIFI_SECURITY_WPA2_WITH_KEY This is macro
DRV_WIFI_SECURITY_WPA2_WITH_KEY.
DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHRASE This is macro
DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHR
ASE.
DRV_WIFI_SECURITY_WPS_PIN This is macro DRV_WIFI_SECURITY_WPS_PIN.
DRV_WIFI_SECURITY_WPS_PUSH_BUTTON This is macro
DRV_WIFI_SECURITY_WPS_PUSH_BUTTON.
DRV_WIFI_VERSION_NUMBER WiFi Driver Version Number
DRV_WIFI_WEP104_KEY_LENGTH 4 keys of 13 bytes each
DRV_WIFI_WEP40_KEY_LENGTH 4 keys of 5 bytes each
DRV_WIFI_WPA_KEY_LENGTH This is macro DRV_WIFI_WPA_KEY_LENGTH.
DRV_WIFI_WPA2_KEY_LENGTH This is macro DRV_WIFI_WPA2_KEY_LENGTH.
DRV_WIFI_WPS_PIN_LENGTH 7 digits + checksum byte
DRV_WIFI_ADHOC_MODES Selection of different AdHoc connection modes
DRV_WIFI_ADHOC_NETWORK_CONTEXT Contains data pertaining to WiFi AdHoc context
DRV_WIFI_CONNECTION_CONTEXT Contains data pertaining to MRF24WG connection
context
DRV_WIFI_CONNECTION_STATES Wifi Connection states
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DRV_WIFI_DEVICE_INFO Contains data pertaining to MRF24WG device type
and version number
DRV_WIFI_DEVICE_TYPES Codes for WiFi device types
DRV_WIFI_DOMAIN_CODES Regional domain codes.
DRV_WIFI_EVENT_CONN_TEMP_LOST_CODES Selection of different codes when WiFi connection
is temporarily lost.
DRV_WIFI_EVENT_INFO Selection of different EventInfo types
DRV_WIFI_EVENTS Selections for events that can occur.
DRV_WIFI_GENERAL_ERRORS This is type DRV_WIFI_GENERAL_ERRORS.
DRV_WIFI_HIBERNATE_STATE This is type DRV_WIFI_HIBERNATE_STATE.
DRV_WIFI_HIBERNATE_STATES Wifi Hibernate states
DRV_WIFI_MAC_STATS Wifi MIB states
DRV_WIFI_MGMT_ERRORS Error codes returned when a mgmt message is
sent to the MRF24W
DRV_WIFI_MGMT_INDICATE_SOFT_AP_EVENT Contains data pertaining to WiFi Soft AP event
DRV_WIFI_MULTICAST_FILTER_IDS Selections for software Multicast filter ID's
DRV_WIFI_MULTICAST_FILTERS Selections for Software Multicast Filters.
DRV_WIFI_POWER_SAVE_STATES Wifi Power Save states
DRV_WIFI_PS_POLL_CONTEXT Contains data pertaining to WiFi PS-Poll context
DRV_WIFI_REASON_CODES Selection of different codes when a deauth or
disassociation event has occurred.
DRV_WIFI_RECONNECT_MODES Selection of different Reconnection modes
DRV_WIFI_SCAN_CONTEXT Contains data pertaining to WiFi scan context
DRV_WIFI_SCAN_RESULT Contains data pertaining to WiFi scan results
DRV_WIFI_SCAN_TYPES Selection of different WiFi scan types
DRV_WIFI_SECURITY_CONTEXT Contains data pertaining to WiFi security.
DRV_WIFI_SOFT_AP_EVENT_REASON_CODES This is type
DRV_WIFI_SOFT_AP_EVENT_REASON_CODES.
DRV_WIFI_SOFT_AP_STATES This is type DRV_WIFI_SOFT_AP_STATES.
DRV_WIFI_STATUS_CODES Selection of different codes when WiFi connection
fails due to association or authentication failure.
DRV_WIFI_SWMULTICAST_CONFIG Contains data pertaining to WiFi software multicast
filter configuration
DRV_WIFI_TX_MODES Selections for WiFi Tx mode
DRV_WIFI_WEP_CONTEXT Contains data pertaining to WiFi WEP context
DRV_WIFI_WEP_KEY_TYPE Selections for WEP key type when using WEP
security.
DRV_WIFI_WPA_CONTEXT Contains data pertaining to WiFi WPA.
DRV_WIFI_WPA_KEY_INFO Contains data pertaining to WiFi WPA Key
DRV_WIFI_WPS_AUTH_TYPES This is type DRV_WIFI_WPS_AUTH_TYPES.
DRV_WIFI_WPS_CONTEXT Contains data pertaining to WiFi WPS security.
DRV_WIFI_WPS_CREDENTIAL Contains data pertaining to WiFi WPS Credentials
DRV_WIFI_WPS_ENCODE_TYPES This is type DRV_WIFI_WPS_ENCODE_TYPES.
adhocMode Selection of different AdHoc connection modes
ENABLE_P2P_PRINTS not supported
ENABLE_WPS_PRINTS This is macro ENABLE_WPS_PRINTS.
PA6_IO debug, remove later
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PA6_TRISTATE This is macro PA6_TRISTATE.
SET_PA6_AS_OUTPUT This is macro SET_PA6_AS_OUTPUT.
WF_WPS_PIN_LENGTH WPS PIN Length
Miscellaneous Functions
Name Description
DRV_WIFI_ConfigDataErase Erases configuration data from the board EEPROM.
DRV_WIFI_ConfigDataLoad Loads configuration data from the board EEPROM.
DRV_WIFI_ConfigDataPrint Outputs to console the configuration data from the board EEPROM.
DRV_WIFI_ConfigDataSave Save configuration data to the board EEPROM.
DRV_WIFI_ProcessEvent Processes WiFi event
DRV_WIFI_ScanGetResult Read selected scan results back from MRF24W.
DRV_WIFI_SetLinkDownThreshold Sets number of consecutive WiFi Tx failures before link is considered down.
DRV_WIFI_SetPSK Sets the binary WPA PSK code in WPS.
DRV_WIFI_SWMultiCastFilterEnable Forces the MRF24WG to use software multicast filters instead of hardware
multicast filters.
DRV_WIFI_YieldPassphraseToHost Allows host to get WPS WPA-PSK passphrase and convert to binary key.
System Configuration Functions
Name Description
DRV_WIFI_Connect Directs the MRF24WG to connect to a WiFi network.
DRV_WIFI_Deinitialize Initializes the MRF24WG WiFi driver.
DRV_WIFI_Disconnect Directs the MRF24WG to disconnect from a WiFi network.
DRV_WIFI_Initialize Initializes the MRF24WG WiFi driver.
DRV_WIFI_Scan Commands the MRF24W to start a scan operation. This will generate the
WF_EVENT_SCAN_RESULTS_READY event.
System Functions
Name Description
DRV_WIFI_BssidGet Sets the the BSSID set in DRV_WIFI_BssidSet().
DRV_WIFI_BssidSet Sets the the Basic Service Set Identifier (BSSID).
DRV_WIFI_ChannelListGet Gets the the channel list.
DRV_WIFI_ChannelListSet Sets the the channel list.
DRV_WIFI_ConnectContextGet Gets the current WiFi connection context
DRV_WIFI_ConnectionStateGet Gets the current WiFi connection state
DRV_WIFI_DeviceInfoGet Retrieves MRF24WG device information
DRV_WIFI_HWMulticastFilterGet Gets a multicast address filter from one of the two multicast filters.
DRV_WIFI_HWMulticastFilterSet Sets a multicast address filter using one of the two hardware multicast filters.
DRV_WIFI_MacAddressGet Retrieves the MRF24WG MAC address
DRV_WIFI_MacAddressSet Uses a different MAC address for the MRF24W
DRV_WIFI_MacStatsGet Gets MAC statistics.
DRV_WIFI_NetworkTypeGet Gets the WiFi network type
DRV_WIFI_NetworkTypeSet Sets the WiFi network type
DRV_WIFI_PowerSaveStateGet Gets the current power-save state.
DRV_WIFI_ReconnectModeGet Gets the WiFi reconnection mode.
DRV_WIFI_ReconnectModeSet Sets the WiFi reconnection mode.
DRV_WIFI_RegionalDomainGet Retrieves the MRF24WG Regional domain
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DRV_WIFI_RtsThresholdGet Gets the RTS Threshold
DRV_WIFI_RtsThresholdSet Sets the RTS Threshold.
DRV_WIFI_ScanContextGet Gets the WiFi scan context.
DRV_WIFI_ScanContextSet Sets the WiFi scan context.
DRV_WIFI_SecurityGet Gets the current WiFi security setting
DRV_WIFI_SecurityOpenSet Sets WiFi security to open (no security)
DRV_WIFI_SecurityWepSet Sets WiFi security to use WEP.
DRV_WIFI_SecurityWpaSet Sets WiFi security to use WPA or WPA2
DRV_WIFI_SecurityWpsSet Sets WiFi security to use WPS
DRV_WIFI_SoftApEventInfoGet Gets the stored Soft AP event info
DRV_WIFI_SsidGet Sets the SSID
DRV_WIFI_SsidSet Sets the SSID
DRV_WIFI_SWMulticastFilterSet Sets a multicast address filter using one of the software multicast filters.
DRV_WIFI_TxModeGet Gets 802.11 Tx mode
DRV_WIFI_TxModeSet Configures 802.11 Tx mode
DRV_WIFI_TxPowerFactoryMaxGet Retrieves the factory-set max Tx power from the MRF24W.
DRV_WIFI_TxPowerMaxGet Gets the Tx max power on the MRF24WG0M.
DRV_WIFI_TxPowerMaxSet Sets the Tx max power on the MRF24WG0M.
DRV_WIFI_WepKeyTypeGet Gets the Wep Key type
DRV_WIFI_WPSCredentialsGet Gets the WPS credentials
DRV_WIFI_AdhocContextSet Sets the AdHoc context.
DRV_WIFI_RssiGet Gets RSSI value set in DRV_WIFI_RssiSet()
DRV_WIFI_RssiSet Sets RSSI restrictions when connecting
DRV_WIFI_GratuitousArpStart Starts a periodic gratuitous ARP response
DRV_WIFI_GratuitousArpStop Stops a periodic gratuitous ARP.
DRV_WIFI_HibernateEnable Puts the MRF24WG into hibernate mode.
DRV_WIFI_isHibernateEnable Checks if MRF24W is in hibernate mode
DRV_WIFI_PsPollDisable Disables PS-Poll mode.
DRV_WIFI_PsPollEnable Enables PS Poll mode.
Description
This section describes the Application Programming Interface (API) functions of the MRF24W Wi-Fi Driver.
Refer to each section for a detailed description.
5.1.13.7.1 System Functions
5.1.13.7.1.1 DRV_WIFI_BssidGet Function
C
void DRV_WIFI_BssidGet(
uint8_t * p_bssid
);
Description
Retrieves the BSSID set in the previous call to DRV_WIFI_BssidSet().
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Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_context pointer to where BSSID will be written.
Returns
None
Remarks
None
Example
uint8_t bssid[6];
DRV_WIFI_BssidGet(bssid);
5.1.13.7.1.2 DRV_WIFI_BssidSet Function
C
void DRV_WIFI_BssidSet(
uint8_t * p_bssid
);
Description
This sets 6 byte (48-bit) MAC address of the Access Point that is being scanned for. It is optional to use this. Where it is useful is
if there are two AP's with the same ID; the BSSID is used to connect to the specified AP. This setting can be used in lieu of the
SSID. Set each byte to 0xFF (default) if the BSSID is not being used. Not typically needed.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_context pointer to BSSID
Returns
None
Remarks
None
Example
uint8_t bssid[6];
bssid[0] = 0x00;
bssid[1] = 0xe8;
bssid[2] = 0xc0;
bssid[3] = 0x11;
bssid[4] = 0x22;
bssid[5] = 0x33;
DRV_WIFI_BssidSet(bssid);
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5.1.13.7.1.3 DRV_WIFI_ChannelListGet Function
C
void DRV_WIFI_ChannelListGet(
uint8_t * p_channelList,
uint8_t * p_numChannels
);
Description
This function gets the current channel list.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_channelList pointer to where channel list will be written
numChannels pointer to where number of channels in the list will be written.
Returns
None
Remarks
None
Example
uint8_t channelList[DRV_WIFI_MAX_CHANNEL_LIST_LENGTH];
uint8_t numChannels;
DRV_WIFI_ChannelListGet(channelList, &numChannels);
5.1.13.7.1.4 DRV_WIFI_ChannelListSet Function
C
void DRV_WIFI_ChannelListSet(
uint8_t * p_channelList,
uint8_t numChannels
);
Description
This function sets the channel list that the MRF24WG will use when scanning or connecting.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_channelList list of channels
numChannels number of channels in list; if set to 0, then MRF24WG will set its channel list to all
valid channels in its regional domain.
Returns
None
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Remarks
None
Example
uint8_t channelList[1,6,11];
DRV_WIFI_ChannelListSet(channelList, sizeof(channelList));
5.1.13.7.1.5 DRV_WIFI_ConnectContextGet Function
C
void DRV_WIFI_ConnectContextGet(
DRV_WIFI_CONNECTION_CONTEXT * p_ctx
);
Description
This function gets the current WiFi connection context.
Preconditions
WiFi initialization must be complete
Parameters
Parameters Description
p_ctx pointer to where connection context is written. See
DRV_WIFI_CONNECTION_CONTEXT structure.
Returns
None
Remarks
None
Example
DRV_WIFI_CONNECTION_CONTEXT ctx;
DRV_WIFI_ConnectContextGet(&ctx);
5.1.13.7.1.6 DRV_WIFI_ConnectionStateGet Function
C
void DRV_WIFI_ConnectionStateGet(
uint8_t * p_state
);
Description
This function gets the current WiFi connection state.
*p_state Description
DRV_WIFI_CSTATE_NOT_CONNECTED No WiFi connection exists
DRV_WIFI_CSTATE_CONNECTION_IN_PROGRESS WiFi connection in progress
DRV_WIFI_CSTATE_CONNECTED_INFRASTRUCTURE WiFi connected in infrastructure mode
DRV_WIFI_CSTATE_CONNECTED_ADHOC WiFi connected in adhoc mode
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DRV_WIFI_CSTATE_RECONNECTION_IN_PROGRESS WiFi in process of reconnecting
DRV_WIFI_CSTATE_CONNECTION_PERMANENTLY_LOST WiFi connection permanently lost
Preconditions
WiFi initialization must be complete
Parameters
Parameters Description
p_state pointer to where state is written (see description)
Returns
None
Remarks
None
Example
uint8_t state;
DRV_WIFI_ConnectionStateGet(&state);
5.1.13.7.1.7 DRV_WIFI_DeviceInfoGet Function
C
void DRV_WIFI_DeviceInfoGet(
DRV_WIFI_DEVICE_INFO * p_deviceInfo
);
Description
This function retrieves MRF24WG device information. See DRV_WIFI_DEVICE_INFO structure.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_deviceInfo Pointer where device info will be written
Returns
None.
Remarks
None.
Example
DRV_WIFI_DEVICE_INFO info;
DRV_WIFI_DeviceInfoGet(&info);
5.1.13.7.1.8 DRV_WIFI_HWMulticastFilterGet Function
C
void DRV_WIFI_HWMulticastFilterGet(
uint8_t multicastFilterId,
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uint8_t multicastAddress[6]
);
Description
Gets the current state of the specified Multicast Filter.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
multicastFilterId DRV_WIFI_MULTICAST_FILTER_1 or DRV_WIFI_MULTICAST_FILTER_2
multicastAddress pointer to where 6-byte multicast filter is written.
Returns
None.
Remarks
None.
Example
uint8_t filterAddress[6];
DRV_WIFI_HWMulticastFilterGet(DRV_WIFI_MULTICAST_FILTER_1, filterAddress);
5.1.13.7.1.9 DRV_WIFI_HWMulticastFilterSet Function
C
void DRV_WIFI_HWMulticastFilterSet(
uint8_t multicastFilterId,
uint8_t multicastAddress[6]
);
Description
This function allows the application to configure up to two hardware Multicast Address Filters on the MRF24W. If two active
multicast filters are set up they are OR’d together – the MRF24W will receive and pass to the Host CPU received packets from
either multicast address. The allowable values for the multicast filter are:
• DRV_WIFI_MULTICAST_FILTER_1
• DRV_WIFI_MULTICAST_FILTER_2
By default, both Multicast Filters are inactive.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
multicastFilterId DRV_WIFI_MULTICAST_FILTER_1 or DRV_WIFI_MULTICAST_FILTER_2
multicastAddress 6-byte address (all 0xFF will inactivate the filter)
Returns
None.
Remarks
Cannot mix hardware and software multicast filters.
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Example
uint8_t multicastFilterId = DRV_WIFI_MULTICAST_FILTER_1;
uint8_t filterAddress[6] = {0x00 0x01, 0x5e, 0x11, 0x22, 0x33};
DRV_WIFI_HWMulticastFilterSet(multicastFilterId, filterAddress);
5.1.13.7.1.10 DRV_WIFI_MacAddressGet Function
C
void DRV_WIFI_MacAddressGet(
uint8_t * p_mac
);
Description
This function retrieves the MRF24WG MAC address.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_mac Pointer where mac address will be written (must point to a 6-byte buffer)
Returns
None.
Remarks
None.
Example
uint8_t mac[6];
DRV_WIFI_MacAddressGet(mac);
5.1.13.7.1.11 DRV_WIFI_MacAddressSet Function
C
void DRV_WIFI_MacAddressSet(
uint8_t * p_mac
);
Description
Directs the MRF24W to use the input MAC address instead of its factory-default MAC address. This function does not overwrite
the factory default, which is in FLASH memory.
Preconditions
WiFi initialization must be complete. Cannot be called when the MRF24W is in a connected state.
Parameters
Parameters Description
p_mac Pointer to 6-byte MAC that will be sent to MRF24WG
Returns
None.
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Remarks
None.
Example
uint8_t mac[6] = {0x00, 0x1e, 0xc0, 0x11, 0x22, 0x33};
DRV_WIFI_MacAddressSet(mac);
5.1.13.7.1.12 DRV_WIFI_MacStatsGet Function
C
void DRV_WIFI_MacStatsGet(
DRV_WIFI_MAC_STATS * p_macStats
);
Description
This function gets the various MAC layer stats as maintained by the MRF24WG.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_macStats Pointer to where MAC statistics are written. See DRV_WIFI_MAC_STATS
structure.
Returns
None.
Remarks
None.
Example
DRV_WIFI_MAC_STATS macStats;
DRV_WIFI_MacStatsGet(&macStats);
5.1.13.7.1.13 DRV_WIFI_NetworkTypeGet Function
C
void DRV_WIFI_NetworkTypeGet(
uint8_t * p_networkType
);
Description
This function gets the WiFi network type.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_networkType Pointer to where the network type will be written.
One of the following DRV_WIFI_NETWORK_TYPE_INFRASTRUCTURE
DRV_WIFI_NETWORK_TYPE_ADHOC
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DRV_WIFI_NETWORK_TYPE_P2P not supported DRV_WIFI_NETWORK_TYPE_SOFT_AP
Returns
None
Remarks
None
Example
uint8_t networkType;
DRV_WIFI_NetworkTypeGet(&networkType);
5.1.13.7.1.14 DRV_WIFI_NetworkTypeSet Function
C
void DRV_WIFI_NetworkTypeSet(
uint8_t networkType
);
Description
This function selects the WiFi network type.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
networkType One of the following: DRV_WIFI_NETWORK_TYPE_INFRASTRUCTURE
DRV_WIFI_NETWORK_TYPE_ADHOC
DRV_WIFI_NETWORK_TYPE_P2P not supported DRV_WIFI_NETWORK_TYPE_SOFT_AP
Returns
None
Remarks
None
Example
DRV_WIFI_NetworkTypeSet(DRV_WIFI_NETWORK_TYPE_INFRASTRUCTURE);
5.1.13.7.1.15 DRV_WIFI_PowerSaveStateGet Function
C
void DRV_WIFI_PowerSaveStateGet(
uint8_t * p_powerSaveState
);
Description
This function gets the current MRF24WG power save state.
powerSaveState Definition
DRV_WIFI_PS_HIBERNATE MRF24W in hibernate state
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DRV_WIFI_PS_PS_POLL_DTIM_ENABLED MRF24W in PS-Poll mode with DTIM enabled
DRV_WIFI_PS_PS_POLL_DTIM_DISABLED MRF24W in PS-Poll mode with DTIM disabled
DRV_WIFI_PS_POLL_OFF MRF24W is not in any power-save state
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_powerSaveState Pointer to where power state is written (see description)
Returns
None.
Remarks
None.
Example
uint8_t state;
DRV_WIFI_PowerSaveStateGet(&state);
5.1.13.7.1.16 DRV_WIFI_ReconnectModeGet Function
C
void DRV_WIFI_ReconnectModeGet(
uint8_t * p_retryCount,
uint8_t * p_deauthAction,
uint8_t * p_beaconTimeout,
uint8_t * p_beaconTimeoutAction
);
Description
This function gets the reconnection mode parameters set in DRV_WIFI_ReconnectModeGet().
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_retryCount Pointer where retry count is written
p_deauthAction Pointer where deauth action is written
p_beaconTimeout Pointer where beacon timeout is written
p_beaconTimeoutAction Pointer where beacon timeout action is written.
Returns
None
Remarks
None
Example
uint8_t retryCount, deauthAction, beaconTimeout, beaconTimeoutAction;
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DRV_WIFI_ReconnectModeGet(&retryCount,
&deauthAction,
&beaconTimeout,
&beaconTimeoutAction);
5.1.13.7.1.17 DRV_WIFI_ReconnectModeSet Function
C
void DRV_WIFI_ReconnectModeSet(
uint8_t retryCount,
uint8_t deauthAction,
uint8_t beaconTimeout,
uint8_t beaconTimeoutAction
);
Description
This function controls how the MRF24WG behaves when an existing WiFi connection is lost. The MRF24WG can lose an
existing connection in one of two ways: 1) Beacon timeout 2) Deauth received from AP
There are two options with respect to regaining a lost WiFi connection: 1) MRF24WG informs the host that the connection was
temporarily lost and then the MRF24WG retries N times (or forever) to regain the connection. 2) MRF24WG simply informs the
host application that the connection is lost, and it is up to the host to regain the connection via the API.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
retryCount Number of times the MRF24WG should try to regain the connection (see
description)
deauthAction In the event of a deauth from the AP, the action the MRF24WG should take (see
description)
beaconTimeout Number of missed beacons before the MRF24WG designates the connection as
lost (see description)
beaconTimeoutAction In the event of a beacon timeout, the action the MRF24WG should take (see
description)
Returns
None
Remarks
The retryCount parameter also applies when initially connecting. That is, the retryCount tells the MRF24WG how many time to
try to connect to a WiFi network before giving up and generating the DRV_WIFI_EVENT_CONNECTION_FAILED event.
'retryCount'
field
Description
0 Do not try to regain a connection (simply report event to host)
1:254 Number of times MRF24WG should try to regain the connection
255 MRF24WG will retry forever (do not use for AdHoc connections)
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'deauthAction' field Description
DRV_WIFI_DO_NOT_ATTEMPT_TO_RECONNECT Do not attempt to reconnect after a deauth
DRV_WIFI_ATTEMPT_TO_RECONNECT Attempt to reconnect after a deauth
'beaconTimeout'
field
Description
0 MRF24WG will not monitor the beacon timeout condition
1:255 Number of missed beacons before designating the connection as lost.
'beaconTimeoutAction' field Description
DRV_WIFI_DO_NOT_ATTEMPT_TO_RECONNECT Do not attempt to reconnect after a beacon timeout
DRV_WIFI_ATTEMPT_TO_RECONNECT Attempt to reconnect after a beacon timeout
None
Example
// Example 1: MRF24WG should retry forever if either a deauth or beacon
// timeout occurs (beacon timeout is 3 beacon periods).
DRV_WIFI_ReconnectModeSet(WF_RETRY_FOREVER,
WF_ATTEMPT_TO_RECONNECT,
3,
WF_ATTEMPT_TO_RECONNECT);
// Example 2: MRF24WG should not do any connection retries and only report
// deauth events to the host.
DRV_WIFI_ReconnectModeSet(0,
WF_DO_NOT_ATTEMPT_TO_RECONNECT,
0,
WF_DO_NOT_ATTEMPT_TO_RECONNECT);
// Example 3: MRF24WG should not do any connection retries, but report deauth
// and beacon timeout events to host. Beacon timeout should be 5 beacon periods.
DRV_WIFI_ReconnectModeSet(0,
WF_DO_NOT_ATTEMPT_TO_RECONNECT,
5,
WF_DO_NOT_ATTEMPT_TO_RECONNECT);
// Example 4: MRF24WG should ignore beacon timeouts, but attempt to
// reconnect 3 times if a deauth occurs.
DRV_WIFI_ReconnectModeSet(3,
WF_ATTEMPT_TO_RECONNECT,
0,
WF_DO_NOT_ATTEMPT_TO_RECONNECT);
5.1.13.7.1.18 DRV_WIFI_RegionalDomainGet Function
C
void DRV_WIFI_RegionalDomainGet(
uint8_t * p_regionalDomain
);
Description
Gets the regional domain on the MRF24W. Values are:
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• DRV_WIFI_DOMAIN_FCC
• DRV_WIFI_DOMAIN_ETSI
• DRV_WIFI_DOMAIN_JAPAN
• DRV_WIFI_DOMAIN_OTHER
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_regionalDomain Pointer where the regional domain value will be written
Returns
None.
Remarks
None.
Example
uint8_t domain;
DRV_WIFI_RegionalDomainGet(&domain);
5.1.13.7.1.19 DRV_WIFI_RtsThresholdGet Function
C
void DRV_WIFI_RtsThresholdGet(
uint16_t * p_rtsThreshold
);
Description
Gets the RTS/CTS packet size threshold.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_rtsThreshold Pointer to where RTS threshold is written
Returns
None.
Remarks
None.
Example
uint16_t threshold;
DRV_WIFI_RtsThresholdGet(&threshold);
5.1.13.7.1.20 DRV_WIFI_RtsThresholdSet Function
C
void DRV_WIFI_RtsThresholdSet(
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uint16_t rtsThreshold
);
Description
Sets the RTS/CTS packet size threshold for when RTS/CTS frame will be sent. The default is 2347 bytes – the maximum for
802.11. It is recommended that the user leave the default at 2347 until they understand the performance and power ramifications
of setting it smaller. Valid values are from 0 to DRV_WIFI_RTS_THRESHOLD_MAX (2347).
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
rtsThreshold Value of the packet size threshold
Returns
None.
Remarks
None.
Example
DRV_WIFI_RtsThresholdSet(DRV_WIFI_RTS_THRESHOLD_MAX);
5.1.13.7.1.21 DRV_WIFI_ScanContextGet Function
C
void DRV_WIFI_ScanContextGet(
DRV_WIFI_SCAN_CONTEXT * p_context
);
Description
This function gets the WiFi scan context.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_context Pointer to where scan context will be written. See DRV_WIFI_SCAN_CONTEXT
structure.
Returns
None.
Remarks
None.
Example
DRV_WIFI_SCAN_CONTEXT context;
DRV_WIFI_ScanContextSet(&context);
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5.1.13.7.1.22 DRV_WIFI_ScanContextSet Function
C
void DRV_WIFI_ScanContextSet(
DRV_WIFI_SCAN_CONTEXT * p_context
);
Description
This function sets the WiFi scan context. The MRF24WG defaults are fine for most applications, but they can be changed by this
function.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_context Pointer to scan context. See DRV_WIFI_SCAN_CONTEXT structure.
Returns
None.
Remarks
None.
Example
DRV_WIFI_SCAN_CONTEXT context;
context.scantype = DRV_WIFI_ACTIVE_SCAN;
context.scanCount = 1;
context.minChannelTime = 200; // ms
context.maxChannelTime = 400; // ms
context.probeDelay = 20; // uS
DRV_WIFI_ScanContextSet(&context);
5.1.13.7.1.23 DRV_WIFI_SecurityGet Function
C
void DRV_WIFI_SecurityGet(
uint8_t * p_securityType,
uint8_t * p_securityKey,
uint8_t * p_securityKeyLength
);
Description
This function gets the current WiFi security setting.
'securityType' Field Key Length
DRV_WIFI_SECURITY_OPEN N/A N/A
DRV_WIFI_SECURITY_WEP_40 binary 4 keys, 5 bytes each (total of 20 bytes)
DRV_WIFI_SECURITY_WEP_104 binary 4 keys, 13 bytes each (total of 52 bytes)
DRV_WIFI_SECURITY_WPA_WITH_KEY binary 32 bytes
DRV_WIFI_SECURITY_WPA_WITH_PASS_PHRASE ascii 8-63 ascii characters
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DRV_WIFI_SECURITY_WPA2_WITH_KEY binary 32 bytes
DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHRASE ascii 8-63 ascii characters
DRV_WIFI_SECURITY_WPA_AUTO_WITH_KEY binary 32 bytes
DRV_WIFI_SECURITY_WPA_AUTO_WITH_PASS_PHRASE ascii 8-63 ascii characters
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_securityType Value corresponding to the security type desired (see description)
p_securityKey Binary key or passphrase (not used if security is DRV_WIFI_SECURITY_OPEN)
p_securityKeyLength Number of bytes in p_securityKey (not used if security is
DRV_WIFI_SECURITY_OPEN)
Returns
None.
Remarks
If security was initially set with a passphrase that the MRF24WG used to generate a binary key, this function returns the binary
key, not the passphrase.
Example
uint8_t securityType;
uint8_t securityKey[DRV_WIFI_MAX_SECURITY_KEY_LENGTH];
uint8_t keyLength;
DRV_WIFI_SecurityGet(&securityType, securityKey, &keyLength);
5.1.13.7.1.24 DRV_WIFI_SecurityOpenSet Function
C
void DRV_WIFI_SecurityOpenSet();
Description
This function sets the WiFi security to open. One can only connect to an AP that is running in open mode.
Preconditions
WiFi initialization must be complete. Must be in an unconnected state.
Returns
None
Remarks
None
Example
DRV_WIFI_SecurityOpenSet();
5.1.13.7.1.25 DRV_WIFI_SecurityWepSet Function
C
void DRV_WIFI_SecurityWepSet(
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DRV_WIFI_WEP_CONTEXT* p_context
);
Description
This function sets the WiFi security to WEP. One can only connect to an AP that is running the same WEP mode.
Preconditions
WiFi initialization must be complete. Must be in an unconnected state.
Parameters
Parameters Description
p_context desired WEP context. See DRV_WIFI_WEP_CONTEXT structure.
Returns
None
Remarks
None
Example
DRV_WIFI_WEP_CONTEXT context;
context.wepSecurityType = DRV_WIFI_SECURITY_WEP_40;
context.wepKey[] = {0x5a, 0xfb, 0x6c, 0x8e, 0x77,
0xc1, 0x04, 0x49, 0xfd, 0x4e,
0x43, 0x18, 0x2b, 0x33, 0x88,
0xb0, 0x73, 0x69, 0xf4, 0x78};
context.wepKeyLength = 20;
context.wepKeyType = DRV_WIFI_SECURITY_WEP_OPENKEY;
DRV_WIFI_SecurityOpenSet(&context);
5.1.13.7.1.26 DRV_WIFI_SecurityWpaSet Function
C
void DRV_WIFI_SecurityWpaSet(
DRV_WIFI_WPA_CONTEXT* p_context
);
Description
This function sets the WiFi security to WPA or WPA2. One can only connect to an AP that is running the same WPA mode.
Preconditions
WiFi initialization must be complete. Must be in an unconnected state.
Parameters
Parameters Description
p_context desired WPA context. See DRV_WIFI_WPA_CONTEXT structure.
Returns
None
Remarks
None
Example
DRV_WIFI_WPA_CONTEXT context;
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context.wpaSecurityType = DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHRASE;
context.keyInfo.key[] = "MySecretWPA2PassPhrase";
context.keyInfo.keyLenth = strlen(context.keyInfo.key);
DRV_WIFI_SecurityWpaSet(&context);
5.1.13.7.1.27 DRV_WIFI_SecurityWpsSet Function
C
void DRV_WIFI_SecurityWpsSet(
DRV_WIFI_WPS_CONTEXT * p_context
);
Description
This function sets the WiFi security to WPS. One can only connect to an AP that supports WPS.
Preconditions
WiFi initialization must be complete. Must be in an unconnected state.
Parameters
Parameters Description
p_context desired WPA context. See DRV_WIFI_WPS_CONTEXT structure.
Returns
None
Remarks
None
Example
DRV_WIFI_WPS_CONTEXT context;
uint8_t wpsPin[8] = {1, 2, 3, 9, 0, 2, 1, 2};
context.wpsSecurityType = DRV_WIFI_SECURITY_WPS_PUSH_BUTTON;
memcpy(context.wpsPin, wpsPin, sizeof(wpsPin));
context.wpsPinLength = 8;
DRV_WIFI_SecurityWpsSet(&context);
5.1.13.7.1.28 DRV_WIFI_SoftApEventInfoGet Function
C
DRV_WIFI_MGMT_INDICATE_SOFT_AP_EVENT * DRV_WIFI_SoftApEventInfoGet();
Description
This function retrieves the additional event info after a Soft AP event has occurred.
Preconditions
Soft AP event must have occurred
Returns
None.
Remarks
None.
Example
DRV_WIFI_MGMT_INDICATE_SOFT_AP_EVENT info;;
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DRV_WIFI_WPSCredentialsGet(&info);
5.1.13.7.1.29 DRV_WIFI_SsidGet Function
C
void DRV_WIFI_SsidGet(
uint8_t * p_ssid,
uint8_t * p_ssidLength
);
Description
Gets the SSID and SSID Length.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_ssid Pointer to buffer where SSID will be written
ssidLength number of bytes in SSID
Returns
None
Remarks
None
Example
uint8_t ssid[DRV_WIFI_MAX_SSID_LENGTH];
uint8_t ssidLength;
DRV_WIFI_SsidGet(ssid, &ssidLength);
5.1.13.7.1.30 DRV_WIFI_SsidSet Function
C
void DRV_WIFI_SsidSet(
uint8_t * p_ssid,
uint8_t ssidLength
);
Description
Sets the SSID and SSID Length. Note that an Access Point can have either a visible or hidden SSID. If an Access Point uses a
hidden SSID then an active scan must be used.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_ssid Pointer to SSID buffer
ssidLength number of bytes in SSID
Returns
None
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Remarks
Do not include a string terminator in the SSID length. SSID's are case- sensitive. SSID length must be less than or equal to
DRV_WIFI_MAX_SSID_LENGTH.
Example
uint8_t ssid[] = "MySSIDName";
uint8_t ssidLength = strlen(ssid);
DRV_WIFI_SsidSet(ssid, ssidLength);
5.1.13.7.1.31 DRV_WIFI_SWMulticastFilterSet Function
C
void DRV_WIFI_SWMulticastFilterSet(
DRV_WIFI_SWMULTICAST_CONFIG * p_config
);
Description
This function allows the application to configure up to two Multicast Address Filters on the MRF24W. If two active multicast filters
are set up they are OR’d together – the MRF24W will receive and pass to the Host CPU received packets from either multicast
address. The allowable values in p_config are:
filterId -- DRV_WIFI_MULTICAST_FILTER_1 thru DRV_WIFI_MULTICAST_FILTER_16
action -- DRV_WIFI_MULTICAST_DISABLE_ALL (default) The Multicast Filter discards all received multicast messages – they
will not be forwarded to the Host PIC. The remaining fields in this structure are ignored.
DRV_WIFI_MULTICAST_ENABLE_ALL The Multicast Filter forwards all received multicast messages to the Host PIC. The
remaining fields in this structure are ignored.
DRV_WIFI_MULTICAST_USE_FILTERS The MAC filter will be used and the remaining fields in this structure configure which
Multicast messages are forwarded to the Host PIC.
macBytes -- Array containing the MAC address to filter on (using the destination address of each incoming 802.11 frame).
Specific bytes with the MAC address can be designated as ‘don’t care’ bytes. See macBitMask. This field in only used if action =
DRV_WIFI_MULTICAST_USE_FILTERS.
macBitMask -- A byte where bits 5:0 correspond to macBytes[5:0]. If the bit is zero then the corresponding MAC byte must be an
exact match for the frame to be forwarded to the Host PIC. If the bit is one then the corresponding MAC byte is a ‘don’t care’ and
not used in the Multicast filtering process. This field in only used if action = DRV_WIFI_MULTICAST_USE_FILTERS.
Preconditions
WiFi initialization must be complete. DRV_WIFI_SWMultiCastFilterEnable() must have been called previously.
Returns
None.
Remarks
Cannot mix hardware and software multicast filters..
Example
DRV_WIFI_SWMULTICAST_CONFIG config;
uint8_t macMask[] = {01, 00, 5e, ff, ff, ff}; // (0xff are the don't care bytes)
// configure software multicast filter 1 to filter multicast addresses that
// start with 01:00:5e
config.action = DRV_WIFI_MULTICAST_USE_FILTERS;
config->filterId = DRV_WIFI_MULTICAST_FILTER_1;
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memcpy(config->macBytes, macMask, 6);
config->macBitMask = 0x38; // bits 5:3 = 1 (don't care on bytes 3,4,5)
// bits 2:0 = 0 (exact match required on bytes
0,1,2)
5.1.13.7.1.32 DRV_WIFI_TxModeGet Function
C
void DRV_WIFI_TxModeGet(
uint8_t * p_mode
);
Description
This function gets the MRF24WG Tx mode.
Preconditions
WiFi initialization must be complete
Returns
None.
Remarks
None.
Example
uint8_t mode;
DRV_WIFI_TxModeGet(&mode);
5.1.13.7.1.33 DRV_WIFI_TxModeSet Function
C
void DRV_WIFI_TxModeSet(
uint8_t mode
);
Description
This function sets the MRF24WG Tx mode.
mode Description
DRV_WIFI_TXMODE_G_RATES Use all 802.11g rates (default)
DRV_WIFI_TXMODE_B_RATES Use only 802.11b rates
DRV_WIFI_TXMODE_LEGACY_RATES Use only 1 and 2 mbps rates
Preconditions
WiFi initialization must be complete
Parameters
Parameters Description
mode Tx mode value (see description)
Returns
None.
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Remarks
None.
Example
DRV_WIFI_TxModeSet(DRV_WIFI_TXMODE_G_RATES);
5.1.13.7.1.34 DRV_WIFI_TxPowerFactoryMaxGet Function
C
void DRV_WIFI_TxPowerFactoryMaxGet(
int8_t * p_factoryMaxTxPower
);
Description
This function retrieves the factory-set max tx power from the MRF24WG.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_factoryMaxTxPower pointer to where factory max power is written (dbM)
Returns
None.
Remarks
None.
Example
int8_t maxPower;
DRV_WIFI_TxPowerFactoryMaxGet(&maxPower);
5.1.13.7.1.35 DRV_WIFI_TxPowerMaxGet Function
C
void DRV_WIFI_TxPowerMaxGet(
int8_t * p_maxTxPower
);
Description
Gets the Tx max power setting from the MRF24WG.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_maxTxPower pointer to where max power setting is written (dBm).
Returns
None.
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Remarks
None
Example
int8_t maxPower;
DRV_WIFI_TxPowerMaxGet(&maxPower);
5.1.13.7.1.36 DRV_WIFI_TxPowerMaxSet Function
C
void DRV_WIFI_TxPowerMaxSet(
int8_t maxTxPower
);
Description
After initialization the MRF24WG0M max Tx power is determined by a factory-set value. This function can set a different
maximum Tx power levels. However, this function can never set a maximum Tx power greater than the factory-set value, which
can be read via DRV_WIFI_TxPowerFactoryMaxGet().
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
maxTxPower valid range (0 to 17 dBm)
Returns
None.
Remarks
No conversion of units needed, input to MRF24WG0M is in dBm.
Example
DRV_WIFI_TxPowerMaxSet(8); // set max Tx power to 8dBm
5.1.13.7.1.37 DRV_WIFI_WepKeyTypeGet Function
C
void DRV_WIFI_WepKeyTypeGet(
uint8_t * p_wepKeyType
);
Description
This function gets the WEP key type:
• DRV_WIFI_SECURITY_WEP_SHAREDKEY
• DRV_WIFI_SECURITY_WEP_OPENKEY
Preconditions
WiFi initialization must be complete.
Returns
None.
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Remarks
None.
Example
uint8_t wepKeyType;
DRV_WIFI_WepKeyTypeGet(&wepKeyType);
5.1.13.7.1.38 DRV_WIFI_WPSCredentialsGet Function
C
void DRV_WIFI_WPSCredentialsGet(
DRV_WIFI_WPS_CREDENTIAL * p_cred
);
Description
This function gets the WPS credentials from the MRF24WG
Preconditions
WiFi initialization must be complete.
Returns
None.
Remarks
None.
Example
DRV_WIFI_WPS_CREDENTIAL cred;;
DRV_WIFI_WPSCredentialsGet(&cred);
5.1.13.7.1.39 DRV_WIFI_AdhocContextSet Function
C
void DRV_WIFI_AdhocContextSet(
DRV_WIFI_ADHOC_NETWORK_CONTEXT * p_context
);
Description
This function sets the AdHoc context. It is only applicable when the DRV_WIFI_NETWORK_TYPE_ADHOC has been selected
in DRV_WIFI_NetworkTypeSet().
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_context pointer to AdHoc context data; see definition for the
DRV_WIFI_ADHOC_NETWORK_CONTEXT structure.
Returns
None
Remarks
None
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Example
DRV_WIFI_ADHOC_NETWORK_CONTEXT adHocContext;
adHocContext.mode = DRV_WIFI_ADHOC_CONNECT_THEN_START;
adHocContext.hiddenSsid = false;
adHocContext.beaconPeriod = DRV_WIFI_DEFAULT_ADHOC_BEACON_PERIOD;
DRV_WIFI_AdhocContextSet(&adHocContext);
5.1.13.7.1.40 DRV_WIFI_RssiGet Function
C
void DRV_WIFI_RssiGet(
uint8_t * p_rssi
);
Description
This function retrieves the value set in Gets RSSI value set in DRV_WIFI_RssiSet(). It does not retrieve the current connection
RSSI value. The scan result will yield the current RSSI.
Preconditions
WiFi initialization must be complete
Parameters
Parameters Description
p_rssi pointer where rssi value is written
Returns
None
Remarks
None
Example
uint8_t rssi;
DRV_WIFI_RssiGet(&rssi);
5.1.13.7.1.41 DRV_WIFI_RssiSet Function
C
void DRV_WIFI_RssiSet(
uint8_t rssi
);
Description
This setting is only used if: 1) Neither an SSID or BSSID has been configured or 2) An SSID is defined and multiple AP's are
discovered with the same SSID
rssi Description
0 Connect to first network found
1-254 Only connect to network if the RSSI is greater or equal to this value
255 Connect to the highest RSSI found (default)
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Preconditions
WiFi initialization must be complete
Parameters
Parameters Description
rssi See description
Returns
None
Remarks
Rarely needed
Example
DRV_WIFI_RssiSet(255);
5.1.13.7.1.42 DRV_WIFI_GratuitousArpStart Function
C
void DRV_WIFI_GratuitousArpStart(
uint8_t period
);
Description
This function starts a gratuitous ARP response to be periodically transmitted.
Preconditions
WiFi initialization must be complete. Connection process must be complete.
Parameters
Parameters Description
period period between gratuitous ARP, in seconds
Returns
None.
Remarks
None.
Example
DRV_WIFI_GratuitousArpStart(10); // begin sending gratuitous ARP's every
// 10 seconds.
5.1.13.7.1.43 DRV_WIFI_GratuitousArpStop Function
C
void DRV_WIFI_GratuitousArpStop();
Description
This function stops a gratuitous ARP.
Preconditions
WiFi initialization must be complete.
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Returns
None.
Remarks
None.
Example
DRV_WIFI_GratuitousArpStop();
5.1.13.7.1.44 DRV_WIFI_HibernateEnable Function
C
void DRV_WIFI_HibernateEnable();
Description
Enables Hibernate mode on the MRF24W, which effectively turns off the device for maximum power savings.
MRF24W state is not maintained when it transitions to hibernate mode.
Preconditions
WiFi initialization must be complete.
Returns
None.
Remarks
None
Example
DRV_WIFI_HibernateEnable();
5.1.13.7.1.45 DRV_WIFI_isHibernateEnable Function
C
bool DRV_WIFI_isHibernateEnable();
Description
Checks if MRF24W is in hibernate mode
Preconditions
WiFi initialization must be complete.
Returns
true or false
Remarks
None
Example
bool flag;
flag = DRV_WIFI_isHibernateEnable();
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5.1.13.7.1.46 DRV_WIFI_PsPollDisable Function
C
void DRV_WIFI_PsPollDisable();
Description
Disables PS Poll mode. The MRF24W will stay active and not go sleep.
Preconditions
WiFi initialization must be complete.
Returns
None.
Remarks
None.
Example
DRV_WIFI_PsPollDisable(&context);
5.1.13.7.1.47 DRV_WIFI_PsPollEnable Function
C
void DRV_WIFI_PsPollEnable(
DRV_WIFI_PS_POLL_CONTEXT * p_context
);
Description
Enables PS Poll mode. PS-Poll (Power-Save Poll) is a mode allowing for longer battery life. The MRF24W coordinates with the
Access Point to go to sleep and wake up at periodic intervals to check for data messages, which the Access Point will buffer.
The listenInterval in the Connection Algorithm defines the sleep interval. By default, PS-Poll mode is disabled.
When PS Poll is enabled, the WF Host Driver will automatically force the MRF24W to wake up each time the Host sends Tx data
or a control message to the MRF24W. When the Host message transaction is complete the MRF24W driver will automatically
re-enable PS Poll mode.
When the application is likely to experience a high volume of data traffic then PS-Poll mode should be disabled for two reasons:
1. No power savings will be realized in the presence of heavy data traffic.
2. Performance will be impacted adversely as the WiFi Host Driver continually activates and deactivates PS-Poll mode via SPI
messages.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_context Pointer to ps poll context. See DRV_WIFI_PS_POLL_CONTEXT structure.
Returns
None.
Remarks
None.
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Example
DRV_WIFI_PS_POLL_CONTEXT context;
context.listenInterval = DRV_WIFI_DEFAULT_PS_LISTEN_INTERVAL;
context.dtimInterval = DRV_WIFI_DEFAULT_PS_DTIM_INTERVAL;
context.useDtim = DRV_WIFI_DEFAULT_PS_DTIM_ENABLED;
DRV_WIFI_PsPollEnable(&context);
5.1.13.7.2 System Configuration Functions
5.1.13.7.2.1 DRV_WIFI_Connect Function
C
void DRV_WIFI_Connect();
Description
This function causes the MRF24WG to connect to a WiFi network. Upon connection, or a failure to connect, an event will be
generated.
Preconditions
WiFi initialization must be complete and relevant connection parameters must have been set.
Returns
None
Remarks
None
Example
DRV_WIFI_Connect();
5.1.13.7.2.2 DRV_WIFI_Deinitialize Function
C
bool DRV_WIFI_Deinitialize();
Description
This function deinitializes the MRF24WG driver. It also saves the WiFi parameters in non-volatile storage.
Preconditions
None.
Returns
If successful returns true, else false.
Remarks
None
5.1.13.7.2.3 DRV_WIFI_Disconnect Function
C
uint16_t DRV_WIFI_Disconnect();
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Description
This function causes the MRF24WG to disconnect from a WiFi network. No event is generated when a connection is terminated
via the function call.
Preconditions
WiFi initialization must be complete and a connection must be in progress.
Returns
DRV_WIFI_SUCCESS or DRV_WIFI_ERROR_DISCONNECT_FAILED
Remarks
None
Example
DRV_WIFI_Disconnect();
5.1.13.7.2.4 DRV_WIFI_Initialize Function
C
bool DRV_WIFI_Initialize(
void* pNetIf
);
Description
Initialization Functions
-----------------------
***************************************************************************
This function initializes the MRF24WG driver, making it ready for clients to use.
Preconditions
None.
Parameters
Parameters Description
pNetIf Pointer to network interface
Returns
If successful returns true, else false.
Remarks
This function must be called before any other WiFi routine is called. Currently, this function performs no work, but that may
change in the future. The WiFi initialization takes place in a state machine called by MRF24W_MACInit().
5.1.13.7.2.5 DRV_WIFI_Scan Function
C
uint16_t DRV_WIFI_Scan(
bool scanAll
);
Description
Directs the MRF24W to initiate a scan operation. The Host Application will be notified that the scan results are ready when it
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receives the WF_EVENT_SCAN_RESULTS_READY event. The eventInfo field for this event will contain the number of scan
results. Once the scan results are ready they can be retrieved with DRV_WIFI_ScanGetResult().
Scan results are retained on the MRF24W until:
1. Calling DRV_WIFI_Scan() again (after scan results returned from previous call).
2. MRF24W reset.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
5.1.13.7.3 Miscellaneous Functions
5.1.13.7.3.1 DRV_WIFI_ConfigDataErase Function
C
bool DRV_WIFI_ConfigDataErase();
Description
This function erases configuration data from the board EEPROM.
Preconditions
TCPIP stack should be initialized.
Returns
None
Remarks
None.
5.1.13.7.3.2 DRV_WIFI_ConfigDataLoad Function
C
bool DRV_WIFI_ConfigDataLoad();
Description
This function loads configuration data from the board EEPROM. If not present or corrupted then default values will be used.
Preconditions
TCPIP stack should be initialized.
Returns
None
Remarks
None.
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5.1.13.7.3.3 DRV_WIFI_ConfigDataPrint Function
C
void DRV_WIFI_ConfigDataPrint();
Description
This function outputs configuration data from the board EEPROM.
Preconditions
TCPIP stack should be initialized.
Returns
None
Remarks
None.
5.1.13.7.3.4 DRV_WIFI_ConfigDataSave Function
C
bool DRV_WIFI_ConfigDataSave();
Description
This function saves configuration data to the board EEPROM.
Preconditions
TCPIP stack should be initialized.
Returns
None
Remarks
None.
5.1.13.7.3.5 DRV_WIFI_ProcessEvent Function
C
void DRV_WIFI_ProcessEvent(
uint16_t event,
uint16_t eventInfo
);
Description
This function is called to process a WiFi event,
Preconditions
TCPIP stack should be initialized.
Parameters
Parameters Description
event event code
eventInfo additional information about the event. Not all events have associated info, in
which case this value will be set to DRV_WIFI_NO_ADDITIONAL_INFO (0xff)
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Returns
None
Remarks
None.
5.1.13.7.3.6 DRV_WIFI_ScanGetResult Function
C
void DRV_WIFI_ScanGetResult(
uint8_t listIndex,
DRV_WIFI_SCAN_RESULT * p_scanResult
);
Description
After a scan has completed this function is used to read one scan result at a time from the MRF24WG.
Preconditions
WiFi initialization must be complete. WF_EVENT_SCAN_RESULTS_READY event must have already occurrerd.
Parameters
Parameters Description
listIndex Index (0-based list) of the scan entry to retrieve.
p_scanResult Pointer to where scan result is written. See DRV_WIFI_SCAN_RESULT structure.
Returns
None.
Remarks
None.
Example
DRV_WIFI_SCAN_RESULT scanResult;
DRV_WIFI_ScanGetResult(0, &scanResult); // get first scan result in list
5.1.13.7.3.7 DRV_WIFI_SetLinkDownThreshold Function
C
void DRV_WIFI_SetLinkDownThreshold(
uint8_t threshold
);
Description
This function allows the application to set the number of MRF24W consecutive Tx failures before the connection failure event
(DRV_WIFI_LINK_LOST) is reported to the host application.
Preconditions
WiFi initialization must be complete
Parameters
Parameters Description
threshold -- 0 disabled (default)
1-255 number of consecutive Tx failures before connection failure event is reported
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Returns
None.
Remarks
None.
Example
DRV_WIFI_SetLinkDownThreshold(0); // disable link down threshold
5.1.13.7.3.8 DRV_WIFI_SetPSK Function
C
void DRV_WIFI_SetPSK(
uint8_t * p_psk
);
Description
This function is used in conjunction with DRV_WIFI_YieldPassphraseToHost(). It sends the binary key to the MRF24WG after
the host has converted an ASCII passphrase to a binary key.
Preconditions
WiFi initialization must be complete.
Parameters
Parameters Description
p_psk pointer to the binary key
Returns
None.
Remarks
None.
Example
DRV_WIFI_YieldPassphraseToHost(&info);
5.1.13.7.3.9 DRV_WIFI_SWMultiCastFilterEnable Function
C
void DRV_WIFI_SWMultiCastFilterEnable();
Description
This function allows the application to configure up to max 16 software multicast address Filters on the MRF24WG0MA/B.
Preconditions
WiFi initialization must be complete.
Returns
None.
Remarks
Cannot mix hardware and software multicast filters..
Example
DRV_WIFI_SWMultiCastFilterEnable();
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5.1.13.7.3.10 DRV_WIFI_YieldPassphraseToHost Function
C
void DRV_WIFI_YieldPassphraseToHost();
Description
During WPS the MRF24WG will receive a passphrase. That passphrase must be converted to a binary key. The MRF24WG can
do this, but it will take 20-30 seconds. The host MCU will be able to convert the passphrase to a binary key much faster. If that is
desired, then this function should be called to request the MRF24WG to signal the
DRV_WIFI_EVENT_KEY_CALCULATION_REQUEST event when the passphrase is ready. Then the host can retrieve the
passphrase (see DRV_WIFI_WPSCredentialsGet()), convert to a binary key (see DRV_WIFI_ConvPassphraseToKey()), and
send it back to the MRF24WG via the DRV_WIFI_SetPSK() function.
Preconditions
WiFi initialization must be complete.
Returns
None.
Remarks
None.
Example
DRV_WIFI_YieldPassphraseToHost(&info);
5.1.13.7.4 Data Types and Constants
5.1.13.7.4.1 DRV_WIFI_BSSID_LENGTH Macro
C
#define DRV_WIFI_BSSID_LENGTH (6)
Description
This is macro DRV_WIFI_BSSID_LENGTH.
5.1.13.7.4.2 DRV_WIFI_DEAUTH_REASONCODE_MASK Macro
C
#define DRV_WIFI_DEAUTH_REASONCODE_MASK ((uint8_t)0x80)
Description
This is macro DRV_WIFI_DEAUTH_REASONCODE_MASK.
5.1.13.7.4.3 DRV_WIFI_DEFAULT_ADHOC_BEACON_PERIOD Macro
C
#define DRV_WIFI_DEFAULT_ADHOC_BEACON_PERIOD (100) // ms
Description
ms
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5.1.13.7.4.4 DRV_WIFI_DEFAULT_ADHOC_HIDDEN_SSID Macro
C
#define DRV_WIFI_DEFAULT_ADHOC_HIDDEN_SSID false
Description
WiFi AdHoc default settings
These defines identify various default WiFi AdHoc settings that can be used in the DRV_WIFI_ADHOC_NETWORK_CONTEXT
structure.
5.1.13.7.4.5 DRV_WIFI_DEFAULT_ADHOC_MODE Macro
C
#define DRV_WIFI_DEFAULT_ADHOC_MODE DRV_WIFI_ADHOC_CONNECT_THEN_START
Description
This is macro DRV_WIFI_DEFAULT_ADHOC_MODE.
5.1.13.7.4.6 DRV_WIFI_DEFAULT_PS_DTIM_ENABLED Macro
C
#define DRV_WIFI_DEFAULT_PS_DTIM_ENABLED true // DTIM wake-up enabled (normally
the case)
Description
DTIM wake-up enabled (normally the case)
5.1.13.7.4.7 DRV_WIFI_DEFAULT_PS_DTIM_INTERVAL Macro
C
#define DRV_WIFI_DEFAULT_PS_DTIM_INTERVAL ((uint16_t)2) // number of beacon periods
Description
number of beacon periods
5.1.13.7.4.8 DRV_WIFI_DEFAULT_PS_LISTEN_INTERVAL Macro
C
#define DRV_WIFI_DEFAULT_PS_LISTEN_INTERVAL ((uint16_t)1) // 100ms multiplier, e.g. 1 *
100ms = 100ms
Description
100ms multiplier, e.g. 1 * 100ms = 100ms
5.1.13.7.4.9 DRV_WIFI_DEFAULT_SCAN_COUNT Macro
C
#define DRV_WIFI_DEFAULT_SCAN_COUNT (1)
Description
WiFi Scan Context default settings
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This enumeration identifies the default WiFi scan context values that can be used in the DRV_WIFI_SCAN_CONTEXT structure.
5.1.13.7.4.10 DRV_WIFI_DEFAULT_SCAN_MAX_CHANNEL_TIME Macro
C
#define DRV_WIFI_DEFAULT_SCAN_MAX_CHANNEL_TIME (400) // ms
Description
ms
5.1.13.7.4.11 DRV_WIFI_DEFAULT_SCAN_MIN_CHANNEL_TIME Macro
C
#define DRV_WIFI_DEFAULT_SCAN_MIN_CHANNEL_TIME (200) // ms
Description
ms
5.1.13.7.4.12 DRV_WIFI_DEFAULT_SCAN_PROBE_DELAY Macro
C
#define DRV_WIFI_DEFAULT_SCAN_PROBE_DELAY (20) // us
Description
us
5.1.13.7.4.13 DRV_WIFI_DEFAULT_WEP_KEY_TYPE Macro
C
#define DRV_WIFI_DEFAULT_WEP_KEY_TYPE DRV_WIFI_SECURITY_WEP_OPENKEY
Description
see DRV_WIFI_SecurityWepSet() and DRV_WIFI_WEP_CONTEXT
5.1.13.7.4.14 DRV_WIFI_DISABLED Macro
C
#define DRV_WIFI_DISABLED (0)
Description
Do not make this an enumerated type!
5.1.13.7.4.15 DRV_WIFI_DISASSOC_REASONCODE_MASK Macro
C
#define DRV_WIFI_DISASSOC_REASONCODE_MASK ((uint8_t)0x40)
Description
This is macro DRV_WIFI_DISASSOC_REASONCODE_MASK.
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5.1.13.7.4.16 DRV_WIFI_ENABLED Macro
C
#define DRV_WIFI_ENABLED (1)
Description
This is macro DRV_WIFI_ENABLED.
5.1.13.7.4.17 DRV_WIFI_MAX_CHANNEL_LIST_LENGTH Macro
C
#define DRV_WIFI_MAX_CHANNEL_LIST_LENGTH (14)
Description
This is macro DRV_WIFI_MAX_CHANNEL_LIST_LENGTH.
5.1.13.7.4.18 DRV_WIFI_MAX_NUM_RATES Macro
C
#define DRV_WIFI_MAX_NUM_RATES (8)
Description
This is macro DRV_WIFI_MAX_NUM_RATES.
5.1.13.7.4.19 DRV_WIFI_MAX_SECURITY_KEY_LENGTH Macro
C
#define DRV_WIFI_MAX_SECURITY_KEY_LENGTH (64)
Description
This is macro DRV_WIFI_MAX_SECURITY_KEY_LENGTH.
5.1.13.7.4.20 DRV_WIFI_MAX_SSID_LENGTH Macro
C
#define DRV_WIFI_MAX_SSID_LENGTH (32)
Description
This is macro DRV_WIFI_MAX_SSID_LENGTH.
5.1.13.7.4.21 DRV_WIFI_MAX_WEP_KEY_LENGTH Macro
C
#define DRV_WIFI_MAX_WEP_KEY_LENGTH (DRV_WIFI_WEP104_KEY_LENGTH)
Description
This is macro DRV_WIFI_MAX_WEP_KEY_LENGTH.
5.1.13.7.4.22 DRV_WIFI_MAX_WPA_PASS_PHRASE_LENGTH Macro
C
#define DRV_WIFI_MAX_WPA_PASS_PHRASE_LENGTH (64) // must include string terminator
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Description
must include string terminator
5.1.13.7.4.23 DRV_WIFI_MAX_WPA2_PASS_PHRASE_LENGTH Macro
C
#define DRV_WIFI_MAX_WPA2_PASS_PHRASE_LENGTH (64)
Description
This is macro DRV_WIFI_MAX_WPA2_PASS_PHRASE_LENGTH.
5.1.13.7.4.24 DRV_WIFI_MIN_WPA_PASS_PHRASE_LENGTH Macro
C
#define DRV_WIFI_MIN_WPA_PASS_PHRASE_LENGTH (8)
Description
Key size defines
5.1.13.7.4.25 DRV_WIFI_NETWORK_TYPE_ADHOC Macro
C
#define DRV_WIFI_NETWORK_TYPE_ADHOC (2)
Description
This is macro DRV_WIFI_NETWORK_TYPE_ADHOC.
5.1.13.7.4.26 DRV_WIFI_NETWORK_TYPE_INFRASTRUCTURE Macro
C
#define DRV_WIFI_NETWORK_TYPE_INFRASTRUCTURE (1)
Description
WiFi Network Types
This enumeration identifies the WiFi network types that can be selected. Do NOT make these an enumerated type as they are
used as a compile switch.
5.1.13.7.4.27 DRV_WIFI_NETWORK_TYPE_P2P Macro
C
#define DRV_WIFI_NETWORK_TYPE_P2P (3) /* not supported */
Description
not supported
5.1.13.7.4.28 DRV_WIFI_NETWORK_TYPE_SOFT_AP Macro
C
#define DRV_WIFI_NETWORK_TYPE_SOFT_AP (4)
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Description
This is macro DRV_WIFI_NETWORK_TYPE_SOFT_AP.
5.1.13.7.4.29 DRV_WIFI_NO_ADDITIONAL_INFO Macro
C
#define DRV_WIFI_NO_ADDITIONAL_INFO ((uint16_t)0xffff)
Description
eventInfo define for DRV_WIFI_ProcessEvent() when no additional info is supplied
5.1.13.7.4.30 DRV_WIFI_RETRY_ADHOC Macro
C
#define DRV_WIFI_RETRY_ADHOC (3)
Description
This is macro DRV_WIFI_RETRY_ADHOC.
5.1.13.7.4.31 DRV_WIFI_RETRY_FOREVER Macro
C
#define DRV_WIFI_RETRY_FOREVER (255)
Description
This is macro DRV_WIFI_RETRY_FOREVER.
5.1.13.7.4.32 DRV_WIFI_RTS_THRESHOLD_MAX Macro
C
#define DRV_WIFI_RTS_THRESHOLD_MAX (2347) /* maximum RTS threshold size in bytes */
Description
maximum RTS threshold size in bytes
5.1.13.7.4.33 DRV_WIFI_SECURITY_EAP Macro
C
#define DRV_WIFI_SECURITY_EAP (11)
Description
This is macro DRV_WIFI_SECURITY_EAP.
5.1.13.7.4.34 DRV_WIFI_SECURITY_OPEN Macro
C
#define DRV_WIFI_SECURITY_OPEN (0)
Description
WiFi Security Types
This enumeration identifies the WiFi security types that can be selected. Do NOT make these an enumerated type as they are
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used as a compile switch.
5.1.13.7.4.35 DRV_WIFI_SECURITY_WEP_104 Macro
C
#define DRV_WIFI_SECURITY_WEP_104 (2)
Description
This is macro DRV_WIFI_SECURITY_WEP_104.
5.1.13.7.4.36 DRV_WIFI_SECURITY_WEP_40 Macro
C
#define DRV_WIFI_SECURITY_WEP_40 (1)
Description
This is macro DRV_WIFI_SECURITY_WEP_40.
5.1.13.7.4.37 DRV_WIFI_SECURITY_WPA_AUTO_WITH_KEY Macro
C
#define DRV_WIFI_SECURITY_WPA_AUTO_WITH_KEY (7)
Description
This is macro DRV_WIFI_SECURITY_WPA_AUTO_WITH_KEY.
5.1.13.7.4.38 DRV_WIFI_SECURITY_WPA_AUTO_WITH_PASS_PHRASE Macro
C
#define DRV_WIFI_SECURITY_WPA_AUTO_WITH_PASS_PHRASE (8)
Description
This is macro DRV_WIFI_SECURITY_WPA_AUTO_WITH_PASS_PHRASE.
5.1.13.7.4.39 DRV_WIFI_SECURITY_WPA_WITH_KEY Macro
C
#define DRV_WIFI_SECURITY_WPA_WITH_KEY (3)
Description
This is macro DRV_WIFI_SECURITY_WPA_WITH_KEY.
5.1.13.7.4.40 DRV_WIFI_SECURITY_WPA_WITH_PASS_PHRASE Macro
C
#define DRV_WIFI_SECURITY_WPA_WITH_PASS_PHRASE (4)
Description
This is macro DRV_WIFI_SECURITY_WPA_WITH_PASS_PHRASE.
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5.1.13.7.4.41 DRV_WIFI_SECURITY_WPA2_WITH_KEY Macro
C
#define DRV_WIFI_SECURITY_WPA2_WITH_KEY (5)
Description
This is macro DRV_WIFI_SECURITY_WPA2_WITH_KEY.
5.1.13.7.4.42 DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHRASE Macro
C
#define DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHRASE (6)
Description
This is macro DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHRASE.
5.1.13.7.4.43 DRV_WIFI_SECURITY_WPS_PIN Macro
C
#define DRV_WIFI_SECURITY_WPS_PIN (10)
Description
This is macro DRV_WIFI_SECURITY_WPS_PIN.
5.1.13.7.4.44 DRV_WIFI_SECURITY_WPS_PUSH_BUTTON Macro
C
#define DRV_WIFI_SECURITY_WPS_PUSH_BUTTON (9)
Description
This is macro DRV_WIFI_SECURITY_WPS_PUSH_BUTTON.
5.1.13.7.4.45 DRV_WIFI_VERSION_NUMBER Macro
C
#define DRV_WIFI_VERSION_NUMBER "3.0.0"
Description
WiFi Driver Version Number
5.1.13.7.4.46 DRV_WIFI_WEP104_KEY_LENGTH Macro
C
#define DRV_WIFI_WEP104_KEY_LENGTH (52) // 4 keys of 13 bytes each
Description
4 keys of 13 bytes each
5.1.13.7.4.47 DRV_WIFI_WEP40_KEY_LENGTH Macro
C
#define DRV_WIFI_WEP40_KEY_LENGTH (20) // 4 keys of 5 bytes each
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Description
4 keys of 5 bytes each
5.1.13.7.4.48 DRV_WIFI_WPA_KEY_LENGTH Macro
C
#define DRV_WIFI_WPA_KEY_LENGTH (32)
Description
This is macro DRV_WIFI_WPA_KEY_LENGTH.
5.1.13.7.4.49 DRV_WIFI_WPA2_KEY_LENGTH Macro
C
#define DRV_WIFI_WPA2_KEY_LENGTH (32)
Description
This is macro DRV_WIFI_WPA2_KEY_LENGTH.
5.1.13.7.4.50 DRV_WIFI_WPS_PIN_LENGTH Macro
C
#define DRV_WIFI_WPS_PIN_LENGTH (8) // 7 digits + checksum byte
Description
7 digits + checksum byte
5.1.13.7.4.51 DRV_WIFI_ADHOC_MODES Enumeration
C
typedef enum adhocMode {
DRV_WIFI_ADHOC_CONNECT_THEN_START = 0,
DRV_WIFI_ADHOC_CONNECT_ONLY = 1,
DRV_WIFI_ADHOC_START_ONLY = 2
} DRV_WIFI_ADHOC_MODES;
Description
AdHoc Modes
This enumeration identifies the AdHoc modes that can be selelcted when connecting in AdHoc mode.
Members
Members Description
DRV_WIFI_ADHOC_CONNECT_THEN_START
= 0
try to connect existing AdHoc network, if not found then start network
DRV_WIFI_ADHOC_CONNECT_ONLY = 1 only connect to existing AdHoc network
DRV_WIFI_ADHOC_START_ONLY = 2 only start a new AdHoc network
5.1.13.7.4.52 DRV_WIFI_ADHOC_NETWORK_CONTEXT Structure
C
typedef struct {
uint8_t mode;
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bool hiddenSsid;
uint16_t beaconPeriod;
} DRV_WIFI_ADHOC_NETWORK_CONTEXT;
Description
WiFi AdHoc Context
This structure contains MRF24WG AdHoc context data. See DRV_WIFI_AdhocContextSet().
Members
Members Description
uint8_t mode; Defines how to start the AdHoc network. See DRV_WIFI_ADHOC_MODE. Default
is DRV_WIFI_ADHOC_CONNECT_THEN_START.
bool hiddenSsid; When starting an AdHoc network, the SSID can be hidden in the beacons. Set
true to hide the SSID, else false. Default is false.
uint16_t beaconPeriod; Sets the beacon period, in ms. Default is 100ms
5.1.13.7.4.53 DRV_WIFI_CONNECTION_CONTEXT Structure
C
typedef struct {
uint8_t channel;
uint8_t bssid[6];
} DRV_WIFI_CONNECTION_CONTEXT;
Description
WiFi Connection Context
This structure contains MRF24WG connection context data. See DRV_WIFI_ConnectContextGet().
Members
Members Description
uint8_t channel; channel number of current connection
uint8_t bssid[6]; bssid of connected AP
5.1.13.7.4.54 DRV_WIFI_CONNECTION_STATES Enumeration
C
typedef enum {
DRV_WIFI_CSTATE_NOT_CONNECTED = 1,
DRV_WIFI_CSTATE_CONNECTION_IN_PROGRESS = 2,
DRV_WIFI_CSTATE_CONNECTED_INFRASTRUCTURE = 3,
DRV_WIFI_CSTATE_CONNECTED_ADHOC = 4,
DRV_WIFI_CSTATE_RECONNECTION_IN_PROGRESS = 5,
DRV_WIFI_CSTATE_CONNECTION_PERMANENTLY_LOST = 6
} DRV_WIFI_CONNECTION_STATES;
Description
WiFi Connection States
This enumeration identifies WiFi Connection states states. See DRV_WIFI_ConnectionStateGet().
Members
Members Description
DRV_WIFI_CSTATE_NOT_CONNECTED = 1 No WiFi connection exists
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DRV_WIFI_CSTATE_CONNECTION_IN_PROGRESS = 2 WiFi connection in progress
DRV_WIFI_CSTATE_CONNECTED_INFRASTRUCTURE = 3 WiFi connected in infrastructure mode
DRV_WIFI_CSTATE_CONNECTED_ADHOC = 4 WiFi connected in adhoc mode
DRV_WIFI_CSTATE_RECONNECTION_IN_PROGRESS = 5 WiFi in process of reconnecting
DRV_WIFI_CSTATE_CONNECTION_PERMANENTLY_LOST
= 6
WiFi connection permanently lost
5.1.13.7.4.55 DRV_WIFI_DEVICE_INFO Structure
C
typedef struct {
uint8_t deviceType;
uint8_t romVersion;
uint8_t patchVersion;
} DRV_WIFI_DEVICE_INFO;
Description
WiFi Device Type/Version
This structure contains MRF24WG device type and version number. See DRV_WIFI_DeviceInfoGet().
Members
Members Description
uint8_t deviceType; MRF24W_DEVICE_TYPE
uint8_t romVersion; MRF24WG ROM version number
uint8_t patchVersion; MRF24WG patch version number
5.1.13.7.4.56 DRV_WIFI_DEVICE_TYPES Enumeration
C
typedef enum {
DRV_WIFI_MRF24WB0M_DEVICE = 1,
DRV_WIFI_MRF24WG0M_DEVICE = 2
} DRV_WIFI_DEVICE_TYPES;
Description
WiFi devices types
This enumeration identifies WiFi device types. The only device supported with this driver is DRV_WIFI_MRF24WG0M_DEVICE
5.1.13.7.4.57 DRV_WIFI_DOMAIN_CODES Enumeration
C
typedef enum {
DRV_WIFI_DOMAIN_FCC = 0,
DRV_WIFI_DOMAIN_ETSI = 2,
DRV_WIFI_DOMAIN_JAPAN = 7,
DRV_WIFI_DOMAIN_OTHER = 7
} DRV_WIFI_DOMAIN_CODES;
Description
WiFi regional domain codes
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This enumeration identifies WiFi regional domain codes. The regional domain can be determined by calling
DRV_WIFI_RegionalDomainGet().
Members
Members Description
DRV_WIFI_DOMAIN_FCC = 0 FCC, available channels: 1 - 11
DRV_WIFI_DOMAIN_ETSI = 2 ESTI, available Channels: 1 - 13
DRV_WIFI_DOMAIN_JAPAN = 7 Japan, available Channels: 1 - 14
DRV_WIFI_DOMAIN_OTHER = 7 Other, available Channels: 1 - 14
5.1.13.7.4.58 DRV_WIFI_EVENT_CONN_TEMP_LOST_CODES Enumeration
C
typedef enum {
DRV_WIFI_BEACON_TIMEOUT = 1,
DRV_WIFI_DEAUTH_RECEIVED = 2,
DRV_WIFI_DISASSOCIATE_RECEIVED = 3
} DRV_WIFI_EVENT_CONN_TEMP_LOST_CODES;
Description
'Connection Temporarily Lost' event codes
This enumeration identifies the codes for a connection temporarily lost. These codes are used in DRV_WIFI_ProcessEvent(),
case DRV_WIFI_EVENT_CONNECTION_TEMPORARILY_LOST.
Members
Members Description
DRV_WIFI_BEACON_TIMEOUT = 1 connection temporarily lost due to beacon timeout
DRV_WIFI_DEAUTH_RECEIVED = 2 connection temporarily lost due to deauth received from AP
DRV_WIFI_DISASSOCIATE_RECEIVED =
3
connection temporarily lost due to disassociation received from AP
5.1.13.7.4.59 DRV_WIFI_EVENT_INFO Enumeration
C
typedef enum {
DRV_WIFI_JOIN_FAILURE = 2,
DRV_WIFI_AUTHENTICATION_FAILURE = 3,
DRV_WIFI_ASSOCIATION_FAILURE = 4,
DRV_WIFI_WEP_HANDSHAKE_FAILURE = 5,
DRV_WIFI_PSK_CALCULATION_FAILURE = 6,
DRV_WIFI_PSK_HANDSHAKE_FAILURE = 7,
DRV_WIFI_ADHOC_JOIN_FAILURE = 8,
DRV_WIFI_SECURITY_MISMATCH_FAILURE = 9,
DRV_WIFI_NO_SUITABLE_AP_FOUND_FAILURE = 10,
DRV_WIFI_RETRY_FOREVER_NOT_SUPPORTED_FAILURE = 11,
DRV_WIFI_LINK_LOST = 12,
DRV_WIFI_TKIP_MIC_FAILURE = 13,
DRV_WIFI_RSN_MIXED_MODE_NOT_SUPPORTED = 14,
DRV_WIFI_RECV_DEAUTH = 15,
DRV_WIFI_RECV_DISASSOC = 16,
DRV_WIFI_WPS_FAILURE = 17,
DRV_WIFI_P2P_FAILURE = 18
} DRV_WIFI_EVENT_INFO;
Description
EventInfo types
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This enumeration identifies the eventInfo types used in DRV_WIFI_ProcessEvent(), case
DRV_WIFI_EVENT_CONNECTION_FAILED.
Members
Members Description
DRV_WIFI_P2P_FAILURE = 18 not supported
5.1.13.7.4.60 DRV_WIFI_EVENTS Enumeration
C
typedef enum {
DRV_WIFI_EVENT_NONE = 0,
DRV_WIFI_EVENT_CONNECTION_SUCCESSFUL = 1,
DRV_WIFI_EVENT_CONNECTION_FAILED = 2,
DRV_WIFI_EVENT_CONNECTION_TEMPORARILY_LOST = 3,
DRV_WIFI_EVENT_CONNECTION_PERMANENTLY_LOST = 4,
DRV_WIFI_EVENT_CONNECTION_REESTABLISHED = 5,
DRV_WIFI_EVENT_FLASH_UPDATE_SUCCESSFUL = 6,
DRV_WIFI_EVENT_FLASH_UPDATE_FAILED = 7,
DRV_WIFI_EVENT_KEY_CALCULATION_REQUEST = 8,
DRV_WIFI_EVENT_SCAN_RESULTS_READY = 9,
DRV_WIFI_EVENT_IE_RESULTS_READY = 10,
DRV_WIFI_EVENT_INVALID_WPS_PIN = 12,
DRV_WIFI_EVENT_SOFT_AP = 13,
DRV_WIFI_EVENT_DISCONNECT_DONE = 14,
DRV_WIFI_EVENT_ERROR = 15
} DRV_WIFI_EVENTS;
Description
WiFi Events
This enumeration identifies the WiFi events that can occur and will be sent to DRV_WIFI_ProcessEvent().
Members
Members Description
DRV_WIFI_EVENT_NONE = 0 No event has occurred
DRV_WIFI_EVENT_CONNECTION_SUCCESSFUL = 1 Connection attempt to network successful
DRV_WIFI_EVENT_CONNECTION_FAILED = 2 Connection attempt failed
DRV_WIFI_EVENT_CONNECTION_TEMPORARILY_LOST
= 3
Connection lost; MRF24W attempting to reconnect
DRV_WIFI_EVENT_CONNECTION_PERMANENTLY_LOST
= 4
Connection lost; MRF24W no longer trying to connect
DRV_WIFI_EVENT_CONNECTION_REESTABLISHED = 5 Connection has been reestablished
DRV_WIFI_EVENT_FLASH_UPDATE_SUCCESSFUL = 6 Update to FLASH successful
DRV_WIFI_EVENT_FLASH_UPDATE_FAILED = 7 Update to FLASH failed
DRV_WIFI_EVENT_KEY_CALCULATION_REQUEST = 8 Key calculation is required
DRV_WIFI_EVENT_SCAN_RESULTS_READY = 9 scan results are ready
DRV_WIFI_EVENT_IE_RESULTS_READY = 10 IE data ready
DRV_WIFI_EVENT_INVALID_WPS_PIN = 12 Invalid WPS pin was entered
DRV_WIFI_EVENT_SOFT_AP = 13 Client connection events
DRV_WIFI_EVENT_DISCONNECT_DONE = 14 Disconnect done event
DRV_WIFI_EVENT_ERROR = 15 WiFi error event occurred
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5.1.13.7.4.61 DRV_WIFI_GENERAL_ERRORS Enumeration
C
typedef enum {
DRV_WIFI_ERROR_IN_HIBERNATE_MODE = 100
} DRV_WIFI_GENERAL_ERRORS;
Description
This is type DRV_WIFI_GENERAL_ERRORS.
Members
Members Description
DRV_WIFI_ERROR_IN_HIBERNATE_MODE
= 100
invalid operation while MRF24WG is in hibernate mode
5.1.13.7.4.62 DRV_WIFI_HIBERNATE_STATE Structure
C
typedef struct {
uint8_t state;
uint8_t wakeup_notice;
} DRV_WIFI_HIBERNATE_STATE;
Description
This is type DRV_WIFI_HIBERNATE_STATE.
5.1.13.7.4.63 DRV_WIFI_HIBERNATE_STATES Enumeration
C
typedef enum {
DRV_WIFI_HB_NO_SLEEP = 0,
DRV_WIFI_HB_ENTER_SLEEP = 1,
DRV_WIFI_HB_WAIT_WAKEUP = 2
} DRV_WIFI_HIBERNATE_STATES;
Description
WiFi Hibernate states
This enumeration identifies WiFi hibernate states.
5.1.13.7.4.64 DRV_WIFI_MAC_STATS Structure
C
typedef struct {
uint32_t MibWEPExcludeCtr;
uint32_t MibTxBytesCtr;
uint32_t MibTxMulticastCtr;
uint32_t MibTxFailedCtr;
uint32_t MibTxRtryCtr;
uint32_t MibTxMultRtryCtr;
uint32_t MibTxSuccessCtr;
uint32_t MibRxDupCtr;
uint32_t MibRxCtsSuccCtr;
uint32_t MibRxCtsFailCtr;
uint32_t MibRxAckFailCtr;
uint32_t MibRxBytesCtr;
uint32_t MibRxFragCtr;
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uint32_t MibRxMultCtr;
uint32_t MibRxFCSErrCtr;
uint32_t MibRxWEPUndecryptCtr;
uint32_t MibRxFragAgedCtr;
uint32_t MibRxMICFailureCtr;
} DRV_WIFI_MAC_STATS;
Description
WiFi MIB states
This structure contains all the MIB data returned from the MRF24WG when DRV_WIFI_MacStatsGet() is called.
Members
Members Description
uint32_t MibWEPExcludeCtr; Number of frames received with the Protected Frame subfield of the Frame
Control field set to zero and the value of dot11ExcludeUnencrypted causes that
frame to be discarded.
uint32_t MibTxBytesCtr; Total number of Tx bytes that have been transmitted
uint32_t MibTxMulticastCtr; Number of frames successfully transmitted that had the multicast bit set in the
destination MAC address
uint32_t MibTxFailedCtr; Number of Tx frames that failed due to the number of transmits exceeding the
retry count
uint32_t MibTxRtryCtr; Number of times a transmitted frame needed to be retried
uint32_t MibTxMultRtryCtr; Number of times a frame was successfully transmitted after more than one
retransmission.
uint32_t MibTxSuccessCtr; Number of Tx frames successfully transmitted.
uint32_t MibRxDupCtr; Number of frames received where the Sequence Control field indicates a duplicate.
uint32_t MibRxCtsSuccCtr; Number of CTS frames received in response to an RTS frame.
uint32_t MibRxCtsFailCtr; Number of times an RTS frame was not received in response to a CTS frame.
uint32_t MibRxAckFailCtr; Number of times an Ack was not received in response to a Tx frame.
uint32_t MibRxBytesCtr; Total number of Rx bytes received.
uint32_t MibRxFragCtr; Number of successful received frames (management or data)
uint32_t MibRxMultCtr; Number of frames received with the multicast bit set in the destination MAC
address.
uint32_t MibRxFCSErrCtr; Number of frames received with an invalid Frame Checksum (FCS).
uint32_t MibRxWEPUndecryptCtr; Number of frames received where the Protected Frame subfield of the Frame
Control Field is set to one and the WEPOn value for the key mapped to the
transmitter?s MAC address indicates the frame should not have been encrypted.
uint32_t MibRxFragAgedCtr; Number of times that fragments aged out, or were not received in the allowable
time.
uint32_t MibRxMICFailureCtr; Number of MIC failures that have occurred.
5.1.13.7.4.65 DRV_WIFI_MGMT_ERRORS Enumeration
C
typedef enum {
DRV_WIFI_SUCCESS = 1,
DRV_WIFI_ERROR_INVALID_SUBTYPE = 2,
DRV_WIFI_ERROR_OPERATION_CANCELLED = 3,
DRV_WIFI_ERROR_FRAME_END_OF_LINE_OCCURRED = 4,
DRV_WIFI_ERROR_FRAME_RETRY_LIMIT_EXCEEDED = 5,
DRV_WIFI_ERROR_EXPECTED_BSS_VALUE_NOT_IN_FRAME = 6,
DRV_WIFI_ERROR_FRAME_SIZE_EXCEEDS_BUFFER_SIZE = 7,
DRV_WIFI_ERROR_FRAME_ENCRYPT_FAILED = 8,
DRV_WIFI_ERROR_INVALID_PARAM = 9,
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DRV_WIFI_ERROR_AUTH_REQ_ISSUED_WHILE_IN_AUTH_STATE = 10,
DRV_WIFI_ERROR_ASSOC_REQ_ISSUED_WHILE_IN_ASSOC_STATE = 11,
DRV_WIFI_ERROR_INSUFFICIENT_RESOURCES = 12,
DRV_WIFI_ERROR_TIMEOUT_OCCURRED = 13,
DRV_WIFI_ERROR_BAD_EXCHANGE_ENCOUNTERED_IN_FRAME_RECEPTION = 14,
DRV_WIFI_ERROR_AUTH_REQUEST_REFUSED = 15,
DRV_WIFI_ERROR_ASSOCIATION_REQUEST_REFUSED = 16,
DRV_WIFI_ERROR_PRIOR_MGMT_REQUEST_IN_PROGRESS = 17,
DRV_WIFI_ERROR_NOT_IN_JOINED_STATE = 18,
DRV_WIFI_ERROR_NOT_IN_ASSOCIATED_STATE = 19,
DRV_WIFI_ERROR_NOT_IN_AUTHENTICATED_STATE = 20,
DRV_WIFI_ERROR_SUPPLICANT_FAILED = 21,
DRV_WIFI_ERROR_UNSUPPORTED_FEATURE = 22,
DRV_WIFI_ERROR_REQUEST_OUT_OF_SYNC = 23,
DRV_WIFI_ERROR_CP_INVALID_ELEMENT_TYPE = 24,
DRV_WIFI_ERROR_CP_INVALID_PROFILE_ID = 25,
DRV_WIFI_ERROR_CP_INVALID_DATA_LENGTH = 26,
DRV_WIFI_ERROR_CP_INVALID_SSID_LENGTH = 27,
DRV_WIFI_ERROR_CP_INVALID_SECURITY_TYPE = 28,
DRV_WIFI_ERROR_CP_INVALID_SECURITY_KEY_LENGTH = 29,
DRV_WIFI_ERROR_CP_INVALID_WEP_KEY_ID = 30,
DRV_WIFI_ERROR_CP_INVALID_NETWORK_TYPE = 31,
DRV_WIFI_ERROR_CP_INVALID_ADHOC_MODE = 32,
DRV_WIFI_ERROR_CP_INVALID_SCAN_TYPE = 33,
DRV_WIFI_ERROR_CP_INVALID_CP_LIST = 34,
DRV_WIFI_ERROR_CP_INVALID_CHANNEL_LIST_LENGTH = 35,
DRV_WIFI_ERROR_NOT_CONNECTED = 36,
DRV_WIFI_ERROR_ALREADY_CONNECTING = 37,
DRV_WIFI_ERROR_DISCONNECT_FAILED = 38,
DRV_WIFI_ERROR_NO_STORED_BSS_DESCRIPTOR = 39,
DRV_WIFI_ERROR_INVALID_MAX_POWER = 40,
DRV_WIFI_ERROR_CONNECTION_TERMINATED = 41,
DRV_WIFI_ERROR_HOST_SCAN_NOT_ALLOWED = 42,
DRV_WIFI_ERROR_INVALID_WPS_PIN = 44
} DRV_WIFI_MGMT_ERRORS;
Description
Mgmt Msg Error Codes
This enumeration identifies the errors that can occur when a DRV_WIFI API function call results in a mgmt message being sent,
via SPI, to the MRF24W.
Members
Members Description
DRV_WIFI_ERROR_DISCONNECT_FAILED = 38 Disconnect failed. Disconnect is allowed only when module is in
connected state
DRV_WIFI_ERROR_NO_STORED_BSS_DESCRIPTOR
= 39
No stored scan results
DRV_WIFI_ERROR_HOST_SCAN_NOT_ALLOWED =
42
Host Scan Failed. Host scan is allowed only in idle or connected
state
DRV_WIFI_ERROR_INVALID_WPS_PIN = 44 WPS pin was invalid
5.1.13.7.4.66 DRV_WIFI_MGMT_INDICATE_SOFT_AP_EVENT Structure
C
typedef struct {
uint8_t reason;
uint8_t address[6];
} DRV_WIFI_MGMT_INDICATE_SOFT_AP_EVENT;
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Description
WiFi Soft AP Event Information
This structure contains data pertaining to Soft AP event. See DRV_WIFI_SoftApEventInfoGet().
Members
Members Description
uint8_t reason; reason code
uint8_t address[6]; MAC address
5.1.13.7.4.67 DRV_WIFI_MULTICAST_FILTER_IDS Enumeration
C
typedef enum {
DRV_WIFI_MULTICAST_FILTER_1 = 4,
DRV_WIFI_MULTICAST_FILTER_2 = 5,
DRV_WIFI_MULTICAST_FILTER_3 = 6,
DRV_WIFI_MULTICAST_FILTER_4 = 7,
DRV_WIFI_MULTICAST_FILTER_5 = 8,
DRV_WIFI_MULTICAST_FILTER_6 = 9,
DRV_WIFI_MULTICAST_FILTER_7 = 10,
DRV_WIFI_MULTICAST_FILTER_8 = 11,
DRV_WIFI_MULTICAST_FILTER_9 = 12,
DRV_WIFI_MULTICAST_FILTER_10 = 13,
DRV_WIFI_MULTICAST_FILTER_11 = 14,
DRV_WIFI_MULTICAST_FILTER_12 = 15,
DRV_WIFI_MULTICAST_FILTER_13 = 16,
DRV_WIFI_MULTICAST_FILTER_14 = 17,
DRV_WIFI_MULTICAST_FILTER_15 = 18,
DRV_WIFI_MULTICAST_FILTER_16 = 19
} DRV_WIFI_MULTICAST_FILTER_IDS;
Description
Multicast Filter ID's
This enumeration identifies the multicast filters that can be selected. See DRV_WIFI_SWMulticastFilterSet().
5.1.13.7.4.68 DRV_WIFI_MULTICAST_FILTERS Enumeration
C
typedef enum {
DRV_WIFI_MULTICAST_DISABLE_ALL = 0,
DRV_WIFI_MULTICAST_ENABLE_ALL = 1,
DRV_WIFI_MULTICAST_USE_FILTERS = 2
} DRV_WIFI_MULTICAST_FILTERS;
Description
Multicast Filter Modes
This enumeration identifies the mode of multicast filters that can be selected. See DRV_WIFI_SWMulticastFilterSet().
Members
Members Description
DRV_WIFI_MULTICAST_DISABLE_ALL =
0
Discard all received multicast messages
DRV_WIFI_MULTICAST_ENABLE_ALL = 1 forward all multicast messages to host MCU
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DRV_WIFI_MULTICAST_USE_FILTERS =
2
Use the MAC filtering capability for multicast messages
5.1.13.7.4.69 DRV_WIFI_POWER_SAVE_STATES Enumeration
C
typedef enum {
DRV_WIFI_PS_HIBERNATE = 1,
DRV_WIFI_PS_PS_POLL_DTIM_ENABLED = 2,
DRV_WIFI_PS_PS_POLL_DTIM_DISABLED = 3,
DRV_WIFI_PS_OFF = 4
} DRV_WIFI_POWER_SAVE_STATES;
Description
WiFi Power Save states
This enumeration identifies WiFi Power save states. See DRV_WIFI_PsPollEnable().
Members
Members Description
DRV_WIFI_PS_HIBERNATE = 1 enable hibernate mode
DRV_WIFI_PS_PS_POLL_DTIM_ENABLED
= 2
enable power save mode with DTIM enabled
DRV_WIFI_PS_PS_POLL_DTIM_DISABLED
= 3
enable power save mode with DTIM disabled
DRV_WIFI_PS_OFF = 4 disable Power Save mode
5.1.13.7.4.70 DRV_WIFI_PS_POLL_CONTEXT Structure
C
typedef struct {
uint16_t listenInterval;
uint16_t dtimInterval;
bool useDtim;
} DRV_WIFI_PS_POLL_CONTEXT;
Description
WiFi PS-Poll Context
This structure contains MRF24WG PS-Poll context data. See DRV_WIFI_PsPollEnable().
Members
Members Description
uint16_t listenInterval; Number of 100ms intervals between instances when the MRF24WG wakes up to
received buffered messages from the network. Each count represents 100ms. For
example, 1 = 100ms, 2 = 200ms, etc. The default is 1 (100ms).
uint16_t dtimInterval; Only used if useDtim is true. The DTIM period indicates how often clients serviced
by the access point should check for buffered multicast or broadcast messages
awaiting pickup on the access point. The DTIM interval is measured in number of
beacon periods. Default for DTIM period is 2.
bool useDtim; True: (default) check for buffered multicast or broadcast messages on the
dtimInterval. False: check for buffered multicast or broadcast messages on the
listenInterval
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5.1.13.7.4.71 DRV_WIFI_REASON_CODES Enumeration
C
typedef enum {
DRV_WIFI_UNSPECIFIED = 1,
DRV_WIFI_REASON_PREV_AUTH_NOT_VALID = 2,
DRV_WIFI_DEAUTH_LEAVING = 3,
DRV_WIFI_DISASSOC_DUE_TO_INACTIVITY = 4,
DRV_WIFI_DISASSOC_AP_BUSY = 5,
DRV_WIFI_CLASS2_FRAME_FROM_NONAUTH_STA = 6,
DRV_WIFI_CLASS3_FRAME_FROM_NONASSOC_STA = 7,
DRV_WIFI_DISASSOC_STA_HAS_LEFT = 8,
DRV_WIFI_STA_REQ_ASSOC_WITHOUT_AUTH = 9,
DRV_WIFI_INVALID_IE = 13,
DRV_WIFI_MIC_FAILURE = 14,
DRV_WIFI_4WAY_HANDSHAKE_TIMEOUT = 15,
DRV_WIFI_GROUP_KEY_HANDSHAKE_TIMEOUT = 16,
DRV_WIFI_IE_DIFFERENT = 17,
DRV_WIFI_INVALID_GROUP_CIPHER = 18,
DRV_WIFI_INVALID_PAIRWISE_CIPHER = 19,
DRV_WIFI_INVALID_AKMP = 20,
DRV_WIFI_UNSUPP_RSN_VERSION = 21,
DRV_WIFI_INVALID_RSN_IE_CAP = 22,
DRV_WIFI_IEEE8021X_FAILED = 23,
DRV_WIFI_CIPHER_SUITE_REJECTED = 24
} DRV_WIFI_REASON_CODES;
Description
Deauth/Disassociate Reason Codes
This enumeration identifies the reason codes for a connection lost due to a deauthorization or disassociation from the AP.
5.1.13.7.4.72 DRV_WIFI_RECONNECT_MODES Enumeration
C
typedef enum {
DRV_WIFI_DO_NOT_ATTEMPT_TO_RECONNECT = 0,
DRV_WIFI_ATTEMPT_TO_RECONNECT = 1
} DRV_WIFI_RECONNECT_MODES;
Description
WiFi Reconnect Modes
This enumeration identifies the reconnection modes that can be used in DRV_WIFI_ReconnectModeSet().
5.1.13.7.4.73 DRV_WIFI_SCAN_CONTEXT Structure
C
typedef struct {
uint8_t scanType;
uint8_t scanCount;
uint16_t minChannelTime;
uint16_t maxChannelTime;
uint16_t probeDelay;
} DRV_WIFI_SCAN_CONTEXT;
Description
WiFi Scan Context
This structure contains MRF24WG scan context data. See DRV_WIFI_ScanContextSet().
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Members
Members Description
uint8_t scanType; 802.11 allows for active scanning, where the device sends out a broadcast probe
request seeking an access point. Also allowed is passive scanning where the
device only listens to beacons being broadcast from access points. Set to
DRV_WIFI_ACTIVE_SCAN (default) or DRV_WIFI_PASSIVE_SCAN
uint8_t scanCount; The number of times to scan a channel while attempting to find a particular access
point. Default is 1
uint16_t minChannelTime; The minimum time (in milliseconds) the MRF24WG will wait for a probe response
after sending a probe request. If no probe responses are received in
minChannelTime then the MRF24WG will go on to the next channel, if any are left
to scan, or quit. Default is 200ms.
uint16_t maxChannelTime; If a probe response is received within minChannelTime then the MRF24WG will
continue to collect any additional probe responses up to maxChannelTime before
going to the next channel in the channelList. Units are in milliseconds. Default is
400ms.
uint16_t probeDelay; The number of microseconds to delay before transmitting a probe request
following the channel change during scanning. Default is 20uS.
5.1.13.7.4.74 DRV_WIFI_SCAN_RESULT Structure
C
typedef struct {
uint8_t bssid[DRV_WIFI_BSSID_LENGTH];
uint8_t ssid[DRV_WIFI_MAX_SSID_LENGTH];
uint8_t apConfig;
uint8_t reserved;
uint16_t beaconPeriod;
uint16_t atimWindow;
uint8_t basicRateSet[DRV_WIFI_MAX_NUM_RATES];
uint8_t rssi;
uint8_t numRates;
uint8_t DtimPeriod;
uint8_t bssType;
uint8_t channel;
uint8_t ssidLen;
} DRV_WIFI_SCAN_RESULT;
Description
WiFi Scan Results
This structure contains the result of WiFi scan operation. See DRV_WIFI_ScanGetResult().
apConfig Bit Mask
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
WPA2 WPA Preamble Privacy Reserved Reserved Reserved IE
IE 1 if AP broadcasting one or more Information Elements, else 0
Privacy 0 : AP is open (no security) 1: AP using security, if neither WPA and WPA2 set then security is WEP.
Preamble 0: AP transmitting with short preamble 1: AP transmitting with long preamble
WPA Only valid if Privacy is 1. 0: AP does not support WPA 1: AP supports WPA
WPA2 Only valid if Privacy is 1. 0: AP does not support WPA2 1: AP supports WPA2
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Members
Members Description
uint8_t bssid[DRV_WIFI_BSSID_LENGTH]; Network BSSID value
uint8_t ssid[DRV_WIFI_MAX_SSID_LENGTH]; Network SSID value
uint8_t apConfig; Access Point config (see description)
uint8_t reserved; not used
uint16_t beaconPeriod; Network beacon interval
uint16_t atimWindow; Only valid if bssType = DRV_WIFI_NETWORK_TYPE_INFRASTRUCTURE
5.1.13.7.4.75 DRV_WIFI_SCAN_TYPES Enumeration
C
typedef enum {
DRV_WIFI_ACTIVE_SCAN = 1,
DRV_WIFI_PASSIVE_SCAN = 2
} DRV_WIFI_SCAN_TYPES;
Description
WiFi Scan Types
This enumeration identifies the WiFi scan types that can be selected.
5.1.13.7.4.76 DRV_WIFI_SECURITY_CONTEXT Union
C
typedef union {
DRV_WIFI_WEP_CONTEXT wepContext;
DRV_WIFI_WPA_CONTEXT wpaContext;
DRV_WIFI_WPS_CONTEXT wpsContext;
} DRV_WIFI_SECURITY_CONTEXT;
Description
WiFi security context
Structure/union can be used in functions DRV_WIFI_SecurityWepSet, DRV_WIFI_SecurityWpaSet, and
DRV_WIFI_SecurityWpsSet
Members
Members Description
DRV_WIFI_WEP_CONTEXT wepContext; set WEP security context
DRV_WIFI_WPA_CONTEXT wpaContext; set WPA security context
DRV_WIFI_WPS_CONTEXT wpsContext; set WPS security context
5.1.13.7.4.77 DRV_WIFI_SOFT_AP_EVENT_REASON_CODES Enumeration
C
typedef enum {
DRV_WIFI_SOFTAP_EVENT_LINK_LOST = 0,
DRV_WIFI_SOFTAP_EVENT_RECEIVED_DEAUTH = 1
} DRV_WIFI_SOFT_AP_EVENT_REASON_CODES;
Description
This is type DRV_WIFI_SOFT_AP_EVENT_REASON_CODES.
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5.1.13.7.4.78 DRV_WIFI_SOFT_AP_STATES Enumeration
C
typedef enum {
DRV_WIFI_SOFTAP_EVENT_CONNECTED = 0,
DRV_WIFI_SOFTAP_EVENT_DISCONNECTED = 1
} DRV_WIFI_SOFT_AP_STATES;
Description
This is type DRV_WIFI_SOFT_AP_STATES.
5.1.13.7.4.79 DRV_WIFI_STATUS_CODES Enumeration
C
typedef enum {
DRV_WIFI_UNSPECIFIED_FAILURE = 1,
DRV_WIFI_CAPS_UNSUPPORTED = 10,
DRV_WIFI_REASSOC_NO_ASSOC = 11,
DRV_WIFI_ASSOC_DENIED_UNSPEC = 12,
DRV_WIFI_NOT_SUPPORTED_AUTH_ALG = 13,
DRV_WIFI_UNKNOWN_AUTH_TRANSACTION = 14,
DRV_WIFI_CHALLENGE_FAIL = 15,
DRV_WIFI_AUTH_TIMEOUT = 16,
DRV_WIFI_AP_UNABLE_TO_HANDLE_NEW_STA = 17,
DRV_WIFI_ASSOC_DENIED_RATES = 18,
DRV_WIFI_ASSOC_DENIED_NOSHORTPREAMBLE = 19,
DRV_WIFI_ASSOC_DENIED_NOPBCC = 20,
DRV_WIFI_ASSOC_DENIED_NOAGILITY = 21,
DRV_WIFI_ASSOC_DENIED_NOSHORTTIME = 25,
DRV_WIFI_ASSOC_DENIED_NODSSSOFDM = 26,
DRV_WIFI_S_INVALID_IE = 40,
DRV_WIFI_S_INVALID_GROUPCIPHER = 41,
DRV_WIFI_S_INVALID_PAIRWISE_CIPHER = 42,
DRV_WIFI_S_INVALID_AKMP = 43,
DRV_WIFI_UNSUPPORTED_RSN_VERSION = 44,
DRV_WIFI_S_INVALID_RSN_IE_CAP = 45,
DRV_WIFI_S_CIPHER_SUITE_REJECTED = 46,
DRV_WIFI_TIMEOUT = 47
} DRV_WIFI_STATUS_CODES;
Description
status codes for connection for association or authentication failure
This enumeration identifies the codes for a connection failure due to association or authentication failure. These codes are used
in DRV_WIFI_ProcessEvent(), case DRV_WIFI_EVENT_CONNECTION_FAILED.
5.1.13.7.4.80 DRV_WIFI_SWMULTICAST_CONFIG Structure
C
typedef struct {
uint8_t filterId;
uint8_t action;
uint8_t macBytes[6];
uint8_t macBitMask;
} DRV_WIFI_SWMULTICAST_CONFIG;
Description
WiFi SW Multicast Filter Config
This structure contains data pertaining to the configuration of the software multicast config filter.
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'action' Field Description
DRV_WIFI_MULTICAST_DISABLE_ALL Multicast filter discards all received multicast messages.
DRV_WIFI_MULTICAST_ENABLE_ALL Multicast filter forwards all received multicast messages to host.
DRV_WIFI_MULTICAST_USE_FILTERS The MAC filter will be used and the remaining fields define the filter.
Members
Members Description
uint8_t filterId; DRV_WIFI_MULTICAST_FILTER_1 thru DRV_WIFI_MULTICAST_FILTER_16
uint8_t action; configures the multicast filter (see description)
uint8_t macBytes[6]; Array containing the MAC address to filter on (using the destination address of
each incoming 802.11 frame). Specific bytes within the MAC address can be
designated as ?don?t care? bytes. See macBitMask. This field in only used if
action = WF_MULTICAST_USE_FILTERS.
uint8_t macBitMask; A byte where bits 5:0 correspond to macBytes[5:0]. If the bit is zero then the
corresponding MAC byte must be an exact match for the frame to be forwarded to
the Host PIC. If the bit is one then the corresponding MAC byte is a ?don?t care?
and not used in the Multicast filtering process. This field in only used if action =
WF_MULTICAST_USE_FILTERS.
5.1.13.7.4.81 DRV_WIFI_TX_MODES Enumeration
C
typedef enum {
DRV_WIFI_TXMODE_G_RATES = 0,
DRV_WIFI_TXMODE_B_RATES = 1,
DRV_WIFI_TXMODE_LEGACY_RATES = 2
} DRV_WIFI_TX_MODES;
Description
Tx Modes
This enumeration identifies the choices the MRF24W Tx mode. It is recommended to use the DRV_WIFI_TXMODE_G_RATES
for best performance. See DRV_WIFI_TxModeSet().
Members
Members Description
DRV_WIFI_TXMODE_G_RATES = 0 Use 802.11 'g' rates
DRV_WIFI_TXMODE_B_RATES = 1 Use only 802.11 'b' rates
DRV_WIFI_TXMODE_LEGACY_RATES =
2
Use only 1 and 2 mbps rates
5.1.13.7.4.82 DRV_WIFI_WEP_CONTEXT Structure
C
typedef struct {
uint8_t wepSecurityType;
uint8_t wepKey[DRV_WIFI_MAX_WEP_KEY_LENGTH];
uint8_t wepKeyLength;
uint8_t wepKeyType;
} DRV_WIFI_WEP_CONTEXT;
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Description
WiFi Wep Security Context
This structure contains MRF24WG WEP context. See DRV_WIFI_SecurityWepSet().
Members
Members Description
uint8_t wepSecurityType; DRV_WIFI_SECURITY_WEP_40 or DRV_WIFI_SECURITY_WEP_104
uint8_t
wepKey[DRV_WIFI_MAX_WEP_KEY_LENGTH];
Array containing four WEP binary keys. This will be four, 5-byte keys for
WEP-40 or four, thirteen-byte keys for WEP-104.
uint8_t wepKeyLength; number of bytes pointed to by p_wepKey
uint8_t wepKeyType; DRV_WIFI_SECURITY_WEP_OPENKEY (default) or
DRV_WIFI_SECURITY_WEP_SHAREDKEY
5.1.13.7.4.83 DRV_WIFI_WEP_KEY_TYPE Enumeration
C
typedef enum {
DRV_WIFI_SECURITY_WEP_SHAREDKEY = 0,
DRV_WIFI_SECURITY_WEP_OPENKEY = 1
} DRV_WIFI_WEP_KEY_TYPE;
Description
WEP Key Types
This enumeration identifies the choices for the WEP key type when using WEP security. The recommended key type (and
default) is Open key.
Members
Members Description
DRV_WIFI_SECURITY_WEP_SHAREDKEY
= 0
use WEP shared key
DRV_WIFI_SECURITY_WEP_OPENKEY =
1
use WEP open key (default)
5.1.13.7.4.84 DRV_WIFI_WPA_CONTEXT Structure
C
typedef struct {
uint8_t wpaSecurityType;
DRV_WIFI_WPA_KEY_INFO keyInfo;
} DRV_WIFI_WPA_CONTEXT;
Description
WiFi WPA context
This structure contains MRF24WG WPA context. See DRV_WIFI_SecurityWpaSet().
wpaSecurityType Description
DRV_WIFI_SECURITY_WPA_WITH_KEY WPA binary key
DRV_WIFI_SECURITY_WPA_WITH_PASS_PHRASE WPA passphrase
DRV_WIFI_SECURITY_WPA2_WITH_KEY WPA2 binary key
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DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHRASE WPA2 passphrase
DRV_WIFI_SECURITY_WPA_AUTO_WITH_KEY Auto-select between WPA/WPA2 with binary key
DRV_WIFI_SECURITY_WPA_AUTO_WITH_PASS_PHRASE Auto-select between WPA/WPA2 with passphrase
Members
Members Description
uint8_t wpaSecurityType; desired security type (see description)
DRV_WIFI_WPA_KEY_INFO keyInfo; see DRV_WIFI_WPA_KEY_INFO
5.1.13.7.4.85 DRV_WIFI_WPA_KEY_INFO Structure
C
typedef struct {
uint8_t key[DRV_WIFI_MAX_WPA2_PASS_PHRASE_LENGTH];
uint8_t keyLength;
} DRV_WIFI_WPA_KEY_INFO;
Description
WiFi WPA Key context
This structure contains MRF24WG WPA key info. This structure is used in the DRV_WIFI_WPA_CONTEXT and
DRV_WIFI_WPS_CONTEXT structures.
Members
Members Description
uint8_t
key[DRV_WIFI_MAX_WPA2_PASS_PHRASE_LENGTH];
binary key or passphrase
uint8_t keyLength; number of bytes in binary key (always 32) or passphrase
5.1.13.7.4.86 DRV_WIFI_WPS_AUTH_TYPES Enumeration
C
typedef enum {
DRV_WIFI_WPS_AUTH_OPEN = 0x01,
DRV_WIFI_WPS_AUTH_WPA_PSK = 0x02,
DRV_WIFI_WPS_AUTH_SHARED = 0x04,
DRV_WIFI_WPS_AUTH_WPA = 0x08,
DRV_WIFI_WPS_AUTH_WPA2 = 0x10,
DRV_WIFI_WPS_AUTH_WPA2_PSK = 0x20
} DRV_WIFI_WPS_AUTH_TYPES;
Description
This is type DRV_WIFI_WPS_AUTH_TYPES.
5.1.13.7.4.87 DRV_WIFI_WPS_CONTEXT Structure
C
typedef struct {
uint8_t wpsSecurityType;
uint8_t wpsPin[DRV_WIFI_WPS_PIN_LENGTH];
uint8_t wpsPinLength;
bool getPassPhrase;
DRV_WIFI_WPA_KEY_INFO * p_keyInfo;
} DRV_WIFI_WPS_CONTEXT;
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Description
WiFi WPS security context
This structure contains MRF24WG WPS security context. See DRV_WIFI_SecurityWpsSet().
Members
Members Description
uint8_t wpsSecurityType; DRV_WIFI_SECURITY_WPS_PUSH_BUTTON or
DRV_WIFI_SECURITY_WPS_PIN
uint8_t
wpsPin[DRV_WIFI_WPS_PIN_LENGTH];
if using DRV_WIFI_SECURITY_WPS_PIN then pointer to 8-digit pin
uint8_t wpsPinLength; should always be 8
bool getPassPhrase; True if ASCII passphrase should be sent back to host so host can (more quickly)
calculate binary key. False if the MRF24WG should calculate the binary key
DRV_WIFI_WPA_KEY_INFO * p_keyInfo; pointer to where the WiFi driver will store passphrase info (must be global memory)
5.1.13.7.4.88 DRV_WIFI_WPS_CREDENTIAL Structure
C
typedef struct {
uint8_t ssid[32];
uint8_t netKey[64];
uint16_t authType;
uint16_t encType;
uint8_t netIdx;
uint8_t ssidLen;
uint8_t keyIdx;
uint8_t keyLen;
uint8_t bssid[6];
} DRV_WIFI_WPS_CREDENTIAL;
Description
WiFi WPS Credentials
This structure contains data pertaining to the configuration of the WiFi WPS credentials.
'authType' Field Description
DRV_WIFI_WPS_AUTH_OPEN open security
DRV_WIFI_WPS_AUTH_WPA_PSK WPA with PSK
DRV_WIFI_WPS_AUTH_SHARED Shared key
DRV_WIFI_WPS_AUTH_WPA WPA
DRV_WIFI_WPS_AUTH_WPA2 WPA2
DRV_WIFI_WPS_AUTH_WPA2_PSK WPA2 with PSK
'encType' Field Description
DRV_WIFI_WPS_ENC_NONE No encoding
DRV_WIFI_WPS_ENC_WEP WEP encoding
DRV_WIFI_WPS_ENC_TKIP WPS/TKIP encodingShared key
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DRV_WIFI_ENC_AES AES encoding
Members
Members Description
uint8_t ssid[32]; network SSID
uint8_t netKey[64]; binary security key (not used if security is open)
uint16_t authType; WPS authorization type (see description)
uint16_t encType; Encoding type (see description)
uint8_t netIdx; not used
uint8_t ssidLen; number of bytes in SSID
uint8_t keyIdx; Only valid encType = WF_ENC_WEP. This is the index of the WEP key being
used.
uint8_t keyLen; number of bytes in netKey
uint8_t bssid[6]; MAC address of AP
5.1.13.7.4.89 DRV_WIFI_WPS_ENCODE_TYPES Enumeration
C
typedef enum {
DRV_WIFI_WPS_ENC_NONE = 0x01,
DRV_WIFI_WPS_ENC_WEP = 0x02,
DRV_WIFI_WPS_ENC_TKIP = 0x04,
DRV_WIFI_ENC_AES = 0x08
} DRV_WIFI_WPS_ENCODE_TYPES;
Description
This is type DRV_WIFI_WPS_ENCODE_TYPES.
5.1.13.7.4.90 ENABLE_P2P_PRINTS Macro
C
#define ENABLE_P2P_PRINTS ((uint8_t)(1 << 1)) /* not supported */
Description
not supported
5.1.13.7.4.91 ENABLE_WPS_PRINTS Macro
C
#define ENABLE_WPS_PRINTS ((uint8_t)(1 << 0))
Description
This is macro ENABLE_WPS_PRINTS.
5.1.13.7.4.92 PA6_IO Macro
C
#define PA6_IO LATAbits.LATA6
Description
debug, remove later
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5.1.13.7.4.93 PA6_TRISTATE Macro
C
#define PA6_TRISTATE TRISAbits.TRISA6
Description
This is macro PA6_TRISTATE.
5.1.13.7.4.94 SET_PA6_AS_OUTPUT Macro
C
#define SET_PA6_AS_OUTPUT TRISAbits.TRISA6 = 0
Description
This is macro SET_PA6_AS_OUTPUT.
5.1.13.7.4.95 WF_WPS_PIN_LENGTH Macro
C
#define WF_WPS_PIN_LENGTH 8
Description
WPS PIN Length
5.1.13.8 Files
Files
Name Description
drv_wifi.h WiFi-specific MAC function prototypes called by TCP/IP stack.
Description
5.1.13.8.1 drv_wifi.h
WiFi MAC interface functions
The functions in this header file are accessed by the TCP/IP stack via function pointers.
Enumerations
Name Description
adhocMode Selection of different AdHoc connection modes
DRV_WIFI_ADHOC_MODES Selection of different AdHoc connection modes
DRV_WIFI_CONNECTION_STATES Wifi Connection states
DRV_WIFI_DEVICE_TYPES Codes for WiFi device types
DRV_WIFI_DOMAIN_CODES Regional domain codes.
DRV_WIFI_EVENT_CONN_TEMP_LOST_CODES Selection of different codes when WiFi connection is
temporarily lost.
DRV_WIFI_EVENT_INFO Selection of different EventInfo types
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DRV_WIFI_EVENTS Selections for events that can occur.
DRV_WIFI_GENERAL_ERRORS This is type DRV_WIFI_GENERAL_ERRORS.
DRV_WIFI_HIBERNATE_STATES Wifi Hibernate states
DRV_WIFI_MGMT_ERRORS Error codes returned when a mgmt message is sent to the
MRF24W
DRV_WIFI_MULTICAST_FILTER_IDS Selections for software Multicast filter ID's
DRV_WIFI_MULTICAST_FILTERS Selections for Software Multicast Filters.
DRV_WIFI_POWER_SAVE_STATES Wifi Power Save states
DRV_WIFI_REASON_CODES Selection of different codes when a deauth or disassociation
event has occurred.
DRV_WIFI_RECONNECT_MODES Selection of different Reconnection modes
DRV_WIFI_SCAN_TYPES Selection of different WiFi scan types
DRV_WIFI_SOFT_AP_EVENT_REASON_CODES This is type
DRV_WIFI_SOFT_AP_EVENT_REASON_CODES.
DRV_WIFI_SOFT_AP_STATES This is type DRV_WIFI_SOFT_AP_STATES.
DRV_WIFI_STATUS_CODES Selection of different codes when WiFi connection fails due to
association or authentication failure.
DRV_WIFI_TX_MODES Selections for WiFi Tx mode
DRV_WIFI_WEP_KEY_TYPE Selections for WEP key type when using WEP security.
DRV_WIFI_WPS_AUTH_TYPES This is type DRV_WIFI_WPS_AUTH_TYPES.
DRV_WIFI_WPS_ENCODE_TYPES This is type DRV_WIFI_WPS_ENCODE_TYPES.
Functions
Name Description
DRV_WIFI_AdhocContextSet Sets the AdHoc context.
DRV_WIFI_BssidGet Sets the the BSSID set in DRV_WIFI_BssidSet().
DRV_WIFI_BssidSet Sets the the Basic Service Set Identifier (BSSID).
DRV_WIFI_ChannelListGet Gets the the channel list.
DRV_WIFI_ChannelListSet Sets the the channel list.
DRV_WIFI_ConfigDataErase Erases configuration data from the board EEPROM.
DRV_WIFI_ConfigDataLoad Loads configuration data from the board EEPROM.
DRV_WIFI_ConfigDataPrint Outputs to console the configuration data from the board EEPROM.
DRV_WIFI_ConfigDataSave Save configuration data to the board EEPROM.
DRV_WIFI_Connect Directs the MRF24WG to connect to a WiFi network.
DRV_WIFI_ConnectContextGet Gets the current WiFi connection context
DRV_WIFI_ConnectionStateGet Gets the current WiFi connection state
DRV_WIFI_Deinitialize Initializes the MRF24WG WiFi driver.
DRV_WIFI_DeviceInfoGet Retrieves MRF24WG device information
DRV_WIFI_Disconnect Directs the MRF24WG to disconnect from a WiFi network.
DRV_WIFI_GratuitousArpStart Starts a periodic gratuitous ARP response
DRV_WIFI_GratuitousArpStop Stops a periodic gratuitous ARP.
DRV_WIFI_HibernateEnable Puts the MRF24WG into hibernate mode.
DRV_WIFI_HWMulticastFilterGet Gets a multicast address filter from one of the two multicast filters.
DRV_WIFI_HWMulticastFilterSet Sets a multicast address filter using one of the two hardware multicast filters.
DRV_WIFI_Initialize Initializes the MRF24WG WiFi driver.
DRV_WIFI_isHibernateEnable Checks if MRF24W is in hibernate mode
DRV_WIFI_MacAddressGet Retrieves the MRF24WG MAC address
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DRV_WIFI_MacAddressSet Uses a different MAC address for the MRF24W
DRV_WIFI_MacStatsGet Gets MAC statistics.
DRV_WIFI_NetworkTypeGet Gets the WiFi network type
DRV_WIFI_NetworkTypeSet Sets the WiFi network type
DRV_WIFI_PowerSaveStateGet Gets the current power-save state.
DRV_WIFI_ProcessEvent Processes WiFi event
DRV_WIFI_PsPollDisable Disables PS-Poll mode.
DRV_WIFI_PsPollEnable Enables PS Poll mode.
DRV_WIFI_ReconnectModeGet Gets the WiFi reconnection mode.
DRV_WIFI_ReconnectModeSet Sets the WiFi reconnection mode.
DRV_WIFI_RegionalDomainGet Retrieves the MRF24WG Regional domain
DRV_WIFI_RssiGet Gets RSSI value set in DRV_WIFI_RssiSet()
DRV_WIFI_RssiSet Sets RSSI restrictions when connecting
DRV_WIFI_RtsThresholdGet Gets the RTS Threshold
DRV_WIFI_RtsThresholdSet Sets the RTS Threshold.
DRV_WIFI_Scan Commands the MRF24W to start a scan operation. This will generate the
WF_EVENT_SCAN_RESULTS_READY event.
DRV_WIFI_ScanContextGet Gets the WiFi scan context.
DRV_WIFI_ScanContextSet Sets the WiFi scan context.
DRV_WIFI_ScanGetResult Read selected scan results back from MRF24W.
DRV_WIFI_SecurityGet Gets the current WiFi security setting
DRV_WIFI_SecurityOpenSet Sets WiFi security to open (no security)
DRV_WIFI_SecurityWepSet Sets WiFi security to use WEP.
DRV_WIFI_SecurityWpaSet Sets WiFi security to use WPA or WPA2
DRV_WIFI_SecurityWpsSet Sets WiFi security to use WPS
DRV_WIFI_SetLinkDownThreshold Sets number of consecutive WiFi Tx failures before link is considered down.
DRV_WIFI_SetPSK Sets the binary WPA PSK code in WPS.
DRV_WIFI_SoftApEventInfoGet Gets the stored Soft AP event info
DRV_WIFI_SsidGet Sets the SSID
DRV_WIFI_SsidSet Sets the SSID
DRV_WIFI_SWMultiCastFilterEnable Forces the MRF24WG to use software multicast filters instead of hardware
multicast filters.
DRV_WIFI_SWMulticastFilterSet Sets a multicast address filter using one of the software multicast filters.
DRV_WIFI_TxModeGet Gets 802.11 Tx mode
DRV_WIFI_TxModeSet Configures 802.11 Tx mode
DRV_WIFI_TxPowerFactoryMaxGet Retrieves the factory-set max Tx power from the MRF24W.
DRV_WIFI_TxPowerMaxGet Gets the Tx max power on the MRF24WG0M.
DRV_WIFI_TxPowerMaxSet Sets the Tx max power on the MRF24WG0M.
DRV_WIFI_WepKeyTypeGet Gets the Wep Key type
DRV_WIFI_WPSCredentialsGet Gets the WPS credentials
DRV_WIFI_YieldPassphraseToHost Allows host to get WPS WPA-PSK passphrase and convert to binary key.
Macros
Name Description
DRV_WIFI_BSSID_LENGTH This is macro DRV_WIFI_BSSID_LENGTH.
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DRV_WIFI_DEAUTH_REASONCODE_MASK This is macro
DRV_WIFI_DEAUTH_REASONCODE_MASK.
DRV_WIFI_DEFAULT_ADHOC_BEACON_PERIOD ms
DRV_WIFI_DEFAULT_ADHOC_HIDDEN_SSID Default values for WiFi AdHoc settings
DRV_WIFI_DEFAULT_ADHOC_MODE This is macro
DRV_WIFI_DEFAULT_ADHOC_MODE.
DRV_WIFI_DEFAULT_PS_DTIM_ENABLED DTIM wake-up enabled (normally the case)
DRV_WIFI_DEFAULT_PS_DTIM_INTERVAL number of beacon periods
DRV_WIFI_DEFAULT_PS_LISTEN_INTERVAL 100ms multiplier, e.g. 1 * 100ms = 100ms
DRV_WIFI_DEFAULT_SCAN_COUNT Default values for WiFi scan context
DRV_WIFI_DEFAULT_SCAN_MAX_CHANNEL_TIME ms
DRV_WIFI_DEFAULT_SCAN_MIN_CHANNEL_TIME ms
DRV_WIFI_DEFAULT_SCAN_PROBE_DELAY us
DRV_WIFI_DEFAULT_WEP_KEY_TYPE see DRV_WIFI_SecurityWepSet() and
DRV_WIFI_WEP_CONTEXT
DRV_WIFI_DISABLED Do not make this an enumerated type!
DRV_WIFI_DISASSOC_REASONCODE_MASK This is macro
DRV_WIFI_DISASSOC_REASONCODE_MASK.
DRV_WIFI_ENABLED This is macro DRV_WIFI_ENABLED.
DRV_WIFI_MAX_CHANNEL_LIST_LENGTH This is macro
DRV_WIFI_MAX_CHANNEL_LIST_LENGTH.
DRV_WIFI_MAX_NUM_RATES This is macro DRV_WIFI_MAX_NUM_RATES.
DRV_WIFI_MAX_SECURITY_KEY_LENGTH This is macro
DRV_WIFI_MAX_SECURITY_KEY_LENGTH.
DRV_WIFI_MAX_SSID_LENGTH This is macro DRV_WIFI_MAX_SSID_LENGTH.
DRV_WIFI_MAX_WEP_KEY_LENGTH This is macro
DRV_WIFI_MAX_WEP_KEY_LENGTH.
DRV_WIFI_MAX_WPA_PASS_PHRASE_LENGTH must include string terminator
DRV_WIFI_MAX_WPA2_PASS_PHRASE_LENGTH This is macro
DRV_WIFI_MAX_WPA2_PASS_PHRASE_LENGT
H.
DRV_WIFI_MIN_WPA_PASS_PHRASE_LENGTH Key size defines
DRV_WIFI_NETWORK_TYPE_ADHOC This is macro
DRV_WIFI_NETWORK_TYPE_ADHOC.
DRV_WIFI_NETWORK_TYPE_INFRASTRUCTURE Selection of different WiFi network types
DRV_WIFI_NETWORK_TYPE_P2P not supported
DRV_WIFI_NETWORK_TYPE_SOFT_AP This is macro
DRV_WIFI_NETWORK_TYPE_SOFT_AP.
DRV_WIFI_NO_ADDITIONAL_INFO eventInfo define for DRV_WIFI_ProcessEvent()
when no additional info is supplied
DRV_WIFI_RETRY_ADHOC This is macro DRV_WIFI_RETRY_ADHOC.
DRV_WIFI_RETRY_FOREVER This is macro DRV_WIFI_RETRY_FOREVER.
DRV_WIFI_RTS_THRESHOLD_MAX maximum RTS threshold size in bytes
DRV_WIFI_SECURITY_EAP This is macro DRV_WIFI_SECURITY_EAP.
DRV_WIFI_SECURITY_OPEN Selection of different WiFi security types
DRV_WIFI_SECURITY_WEP_104 This is macro DRV_WIFI_SECURITY_WEP_104.
DRV_WIFI_SECURITY_WEP_40 This is macro DRV_WIFI_SECURITY_WEP_40.
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DRV_WIFI_SECURITY_WPA_AUTO_WITH_KEY This is macro
DRV_WIFI_SECURITY_WPA_AUTO_WITH_KEY.
DRV_WIFI_SECURITY_WPA_AUTO_WITH_PASS_PHRASE This is macro
DRV_WIFI_SECURITY_WPA_AUTO_WITH_PASS
_PHRASE.
DRV_WIFI_SECURITY_WPA_WITH_KEY This is macro
DRV_WIFI_SECURITY_WPA_WITH_KEY.
DRV_WIFI_SECURITY_WPA_WITH_PASS_PHRASE This is macro
DRV_WIFI_SECURITY_WPA_WITH_PASS_PHRA
SE.
DRV_WIFI_SECURITY_WPA2_WITH_KEY This is macro
DRV_WIFI_SECURITY_WPA2_WITH_KEY.
DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHRASE This is macro
DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHR
ASE.
DRV_WIFI_SECURITY_WPS_PIN This is macro DRV_WIFI_SECURITY_WPS_PIN.
DRV_WIFI_SECURITY_WPS_PUSH_BUTTON This is macro
DRV_WIFI_SECURITY_WPS_PUSH_BUTTON.
DRV_WIFI_VERSION_NUMBER WiFi Driver Version Number
DRV_WIFI_WEP104_KEY_LENGTH 4 keys of 13 bytes each
DRV_WIFI_WEP40_KEY_LENGTH 4 keys of 5 bytes each
DRV_WIFI_WPA_KEY_LENGTH This is macro DRV_WIFI_WPA_KEY_LENGTH.
DRV_WIFI_WPA2_KEY_LENGTH This is macro DRV_WIFI_WPA2_KEY_LENGTH.
DRV_WIFI_WPS_PIN_LENGTH 7 digits + checksum byte
ENABLE_P2P_PRINTS not supported
ENABLE_WPS_PRINTS This is macro ENABLE_WPS_PRINTS.
PA6_IO debug, remove later
PA6_TRISTATE This is macro PA6_TRISTATE.
SET_PA6_AS_OUTPUT This is macro SET_PA6_AS_OUTPUT.
WF_WPS_PIN_LENGTH WPS PIN Length
Structures
Name Description
DRV_WIFI_ADHOC_NETWORK_CONTEXT Contains data pertaining to WiFi AdHoc context
DRV_WIFI_CONNECTION_CONTEXT Contains data pertaining to MRF24WG connection context
DRV_WIFI_DEVICE_INFO Contains data pertaining to MRF24WG device type and
version number
DRV_WIFI_HIBERNATE_STATE This is type DRV_WIFI_HIBERNATE_STATE.
DRV_WIFI_MAC_STATS Wifi MIB states
DRV_WIFI_MGMT_INDICATE_SOFT_AP_EVENT Contains data pertaining to WiFi Soft AP event
DRV_WIFI_PS_POLL_CONTEXT Contains data pertaining to WiFi PS-Poll context
DRV_WIFI_SCAN_CONTEXT Contains data pertaining to WiFi scan context
DRV_WIFI_SCAN_RESULT Contains data pertaining to WiFi scan results
DRV_WIFI_SWMULTICAST_CONFIG Contains data pertaining to WiFi software multicast filter
configuration
DRV_WIFI_WEP_CONTEXT Contains data pertaining to WiFi WEP context
DRV_WIFI_WPA_CONTEXT Contains data pertaining to WiFi WPA.
DRV_WIFI_WPA_KEY_INFO Contains data pertaining to WiFi WPA Key
DRV_WIFI_WPS_CONTEXT Contains data pertaining to WiFi WPS security.
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DRV_WIFI_WPS_CREDENTIAL Contains data pertaining to WiFi WPS Credentials
Unions
Name Description
DRV_WIFI_SECURITY_CONTEXT Contains data pertaining to WiFi security.
File Name
drv_wifi_mac.h
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5.2 Graphics Library Help
5.2.1 Graphics Library Porting Guide
5.2.1.1 Introduction
Porting to the MPLAB Harmony Graphics Library
This help file provides information for porting from the Microchip Library of Applications (MLA) version of the Graphics Library to
the Graphics Library within MPLAB Harmony.
5.2.1.2 Release Notes
MPLAB Harmony Version: v0.70b Release Date: Graphics Library: 4.00 18Nov2013
New This Release:
This is the first release of the library.
Known Issues:
Nothing to report in this release.
5.2.1.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.2.1.4 Upgrading from the MLA Graphics Library to the MPLAB
Harmony Graphics Library
The MPLAB Harmony Graphics Library is a completely new distribution, which is included as part of the MPLAB Harmony
installation. No files need to be maintained from an existing MLA Graphics Library installation.
5.2.1.4.1 MPLAB Harmony Graphics Library Key Features
This topic provides a description of the key features of the MPLAB Harmony Graphics Library.
Description
Note: The MPLAB Harmony Graphics Library does not support any Microchip 16-bit family devices.
The following are the key features of the MPLAB Harmony Graphics Library:
• Multiple interfaces
• Fully dynamic:
• Stack initialization/deinitialization
• Resource management
• Configurable
• Improved modularity and stack layout
• Interrupt driven operation
• RTOS friendly, with easy RTOS integration
5.2.1.4.2 MPLAB Harmony Graphics Library Structure
This topic describes the structure of the MPLAB Harmony Graphics Library.
Description
The MPLAB Harmony Graphics Library consists of a graphic widget and primitive library, a display layer, a graphics driver, and
demonstration applications, all of which support the following structure:
• Lowercase file names
• Underscores are used
• System services are used instead of direct access to peripherals
• Interrupts
• Drivers
• Timer Services
• File System
• Board Support Package (BSP)
By default, the Graphics Library and its corresponding display drivers and demonstration applications are placed into the
following locations during installation of MPLAB Harmony:
• ./microchip/harmony//framework/gfx
• ./microchip/harmony//framework/driver/gfx
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• ./microchip/harmony//apps/gfx
5.2.1.4.3 MPLAB Harmony Graphics Library Design
This topic discusses the design of the MPLAB Harmony Graphics Library.
Description
The MPLAB Harmony Graphics Library is designed as a part of a system running other applications, middleware, etc. Therefore,
it makes use of the system services that are available to other modules in the system or to the application, such as:
• File system
• System interrupts
• System driver services
• System timers
• System device drivers
• System command processor
• System console
• System debug services
Refer to the ./framework/gfx/src/system folder for the header files that expose the system wide available API.
5.2.1.4.4 MPLAB Harmony Graphics Library API Changes
This topic discusses the reasons behind the API changes to the MPLAB Harmony Graphics Library.
Description
The API is backward compatible in functionality only. All function names and type definitions have changed to reflect the MPLAB
Harmony philosophy.
The changes in the library API have been minimized so that the porting process is straightforward and integration with other
dependents is made simple. New functionality has been added because of new features, such as dynamic configuration and
non-block of the library. Other than these new features, the changes to the API were also made to support commonality between
the MPLAB Harmony Graphics Library and the 16-bit Graphics Library.
The API changes are at all layers of the Graphics Library which include the GOL, Primitive, and Driver layers.
5.2.1.4.5 MPLAB Harmony Graphics Library Access Changes
This topic describes the stack access updates that were made to the MPLAB Harmony Graphics Library.
Description
The Graphics Library no longer initializes the display driver, but requires the application to initialize the driver before calling any
Graphics Library functions. For example: GFX_DRV_lcc_Initialize()
Direct access to the Graphics Driver has been removed.
5.2.1.4.5.1 Graphic Primitive Layer Changes
This topic discusses the changes made to the MLA Graphics Library primitive.h file to produce the equivalent MPLAB
Harmony Graphics Library gfx_primitive.h file.
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Description
Changes
The changes are as follows:
• Prefix:
• GFX_ is the generic prefix for functions
• gfx_ is the generic prefix for primitive level files
• Non-blocking support - A task queue has been added to ensure that functions do not block execution of other non-graphics
time-critical tasks
• GFX_Initialize - This function replaces the InitGraph function. The GFX_Initialize function does the following:
• Sets the line type to SOLID_LINE
• Sets the current drawing color to WHITE
• Sets the graphic cursor position to the upper left corner of the screen
• Sets active and visual pages to page 0
• Clears the active page and disables clipping
The GFX_Initialize function should be called before using the Graphics Primitive Layer.
5.2.1.4.5.2 Graphic Object Layer (GOL) Changes
This topic discusses the changes made to the MLA Graphics Library GOL.h file to produce the equivalent MPLAB Harmony
Graphics Library gfx_gol.h file.
Description
Changes
The changes are as follows.
• Prefix:
• GFX_GOL_ is the generic prefix for all Graphic Object Level functions
• gfx_gol_ is the generic prefix for all Graphic Object Level files
• Non-blocking support – a task queue has been added to ensure that functions do not block execution of other non-graphics
time-critical tasks
• GFX_Initialize – This function replaces the MLA GOL_Init function, which overrides the equivalent primitive function.
This function initializes the graphics library and creates a default style scheme with default settings referenced by the global
scheme pointer. GFX_Initialize must be called before GOL functions can be used.
5.2.1.4.5.3 Graphic Display Driver Layer Changes
This topic discusses the changes made to the DisplayDriver.h file.
This topic discusses the changes made to the MLA Graphics Library DisplayDriver.h file to produce the equivalent MPLAB
Harmony Graphics Library drv_gfx_display.h file.
Description
Changes
The changes are as follows:
• Prefix:
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• DRV_GFX is the generic prefix for all Graphics Driver level functions
• drv_gfx is the generic prefix for all Graphics Driver level files
• Common API Interface – This interface establishes the basic set of driver functions and parameters required by the Graphics
Primitive Layer to display graphics content on a Liquid Crystal Display. It also lists the initialization and deinitialization
functions and parameters required by the application to establish a driver.
5.2.1.4.6 MPLAB Harmony Graphics Library Initialization Changes
This topic describes the initialization updates to the MPLAB Harmony Graphics Library.
Description
The Graphics Library include header files, gfx_gol.h and gfx_primitive.h, have been updated as follows.
To initialize the library the call is now: GFX_Initialize()
The default Graphics Library configuration is provided with the library distribution and consists of:
• drv_gfx__config_template.h
• gfx_config_template.h
An example of the graphics initialization can be observed in each of the graphics demonstration distributions.
Note: Both the GOL and primitive layers implement the GFX_Initialize() function; however, the primitive layer function will
be over-ridden and not used if gfx_gol.c is compiled.
5.2.1.4.7 New MPLAB Harmony Graphics Library API Functions
This topic describes some of the important new API functions in the MPLAB Harmony Graphics Library.
Description
There are many new functions available that have been introduced to support the MPLAB Harmony philosophy. However, there
is no concern for the porting process regarding the new API calls as the previous library implementation did not support this kind
of service.
Existing applications will not port without using the new APIs:
• Initialization
• Steady-State
5.2.1.4.7.1 Main Program Changes
This topic describes the main program changes in the MPLAB Harmony Graphics Library.
Description
Main Program Changes
There are few changes that must be taken care of by the main program loop. A full working example is given with the file,
main.c, which is provided in all of the Graphics Library demonstrations.
The main program should call the following functions:
• SYS_Initialize()
• SYS_Tasks()
• GFX_GOL_ObjectListDraw()
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5.2.1.4.8 MPLAB Harmony Graphics Library Configuration Changes
This topic describes the configuration changes in the MPLAB Harmony Graphics Library.
Description
The stack configuration has a completely new structure. Each project has its own configuration folder that stores multiple
configurations based on CPU platforms and hardware boards.
Note: The MLA Hardware_Profile.h file cannot be reused in the MPLAB Harmony Graphics Library.
The following is a list of the most important features:
• system_config.h – This file contains the working set of configuration definitions
• gfx_config_template.h – This file lists the entire possible graphics configuration definitions
• bsp – This is the parent directory that contains hardware configuration settings for particular Microchip development boards
5.2.1.4.8.1 MPLAB Harmony Graphics Library Configuration
This topic provides information on the configuration of the MPLAB Harmony Graphics Library.
Description
MPLAB Harmony Graphics Library Configuration
Note: This content was not available at time of release and will be added in a future release of MPLAB Harmony.
5.2.1.4.8.2 MPLAB Harmony Graphics Library BSP Configuration
This topic provides information on the BSP configuration of the MPLAB Harmony Graphics Library.
Description
MPLAB Harmony Graphics Library BSP Configuration
The MPLAB Harmony Graphics Library references the following BSP configurations:
• bsp/meb - contains board support content for the Multimedia Expansion Board and the Multimedia Expansion Board II (MEB II)
• bsp/pcap - contains board support content for the PIC32 mTouch Capacitive Touch Evaluation Board
• bsp/pictail - contains board support content for PICtail and subtending connectable liquid crystal displays (LCDs)
5.2.1.4.9 MPLAB Harmony Graphics Library Utilities
This topic describes the MPLAB Harmony Graphics Library utilities.
Description
The MPLAB Harmony Graphics Library includes the following utilities:
• Graphics Display Designer X (GDDX) - This utility can be used for designing and building graphical user interfaces (GUIs)
from graphics objects
• Graphics Resource Converter (GRC) - This utility can be used for converting data into logically deployable entities that can be
used in a graphics application
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5.2.1.5 Porting Applications from the MLA Graphics Library to the
MPLAB Harmony Graphics Library
Porting an application from the MLA Graphics Library into the Graphics Library within MPLAB Harmony consists of updating
existing Graphics Library function names in your application to the new MPLAB Harmony function names.
5.2.1.5.1 MPLAB Harmony Graphics Library File Name Compliance
This topic provides header file name mapping tables that show the MLA Graphics Library file name and the compliant name
within the MPLAB Harmony Graphics Library.
Description
The replacement names chosen to make existing Graphics Library functions compliant with MPLAB Harmony are shown in
individual tables per header file name.
The files listed in the tables are located in the following two MPLAB Harmony installation folders:
.\harmony\\framework\gfx
.\harmony\\framework\gfx\src
The following table shows the original and new names used. Note that other than name changes, no other modifications were
made to the middleware functions.
MLA Graphics Library File Name MPLAB Harmony Graphics Library File Name
AnalogClock.h gfx_gol_analog_clock.h
Button.h gfx_gol_button.h
Chart.h gfx_gol_chart.h
CheckBox.h gfx_gol_check_box.h
DigitalMeter.h gfx_gol_digital_meter.h
EditBox.h gfx_gol_edit_box.h
GOL.h gfx_gol.h
Graphics.h gfx.h
Grid.h gfx_gol_grid.h (not supported in this release)
GroupBox.h gfx_gol_group_box.h
ListBox.h gfx_gol_list_box.h
Meter.h gfx_gol_meter.h
Palette.h gfx_palette.h
Picture.h gfx_picture.h
Primitive.h gfx_primitive.h
ProgressBar.h gfx_gol_progress_bar.h
Radiobutton.h gfx_gol_radio_button.h
RoundDial.h gfx_gol_round_dial.h
Slider.h gfx_gol_scrollbar.h
StaticText.h gfx_gol_static_text.h
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TextEntry.h gfx_gol_text_entry.h
Transitions.h gfx_transitions.h
Window.h gfx_gol_window.h
5.2.1.5.2 MPLAB Harmony Graphics Library Function Name Compliance
This topic provides header file function mapping tables that show the MLA Graphics Library function name and the compliant
name within the MPLAB Harmony Graphics Library.
Description
The replacement function names chosen to make the existing MLA Graphics Library function compliant with MPLAB Harmony
are shown in individual tables per header file name.
The files listed in the tables are located in the following MPLAB Harmony installation folder:
.\harmony\\framework\gfx.
Header File: gfx_display_driver.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
InitGraph() GFX_PixelsPut()
PutPixel GFX_BarFill()
GetPixel() GFX_PixelArrayPut()
SetColor() GFX_PixelArrayGet()
PutPixel GFX_PixelPut()
SetColor () GFX_SetColor()
GetTransparentColor() GFX_SetInstance()
TransparentColorEnable() GFX_SetPage()
TransparentColorDisable() GFX_Layer()
Bar() GFX_PixelGet()
(Content pending) GFX_AlphaBlendWindow()
Header File: gfx_primitive.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
InitGraph() GFX_Initialize()
PutPixel GFX_PixelPut()
GetPixel() GFX_PixelGet()
SetColor() GFX_ColorSet()
GetColor GFX_ColorGet()
TransparentColorEnable() GFX_TransparentColorSet()
GetTransparentColor() GFX_TransparentColorGet()
TransparentColorEnable() GFX_TransparentColorEnable()
TransparentColorDisable() GFX_TransparentColorDisable()
Bar() GFX_BarDraw()
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Header File: gfx_palette.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
PaletteInit() GFX_PaletteInit()
EnablePalette() GFX_PaletteEnable()
DisablePalette() GFX_PaletteDisable()
IsPaletteEnabled() GFX_IsPaletteEnabled()
GetPaletteChangeError() GFX_PaletteChangeErrorGet()
ClearPaletteChangeError() GFX_PaletteChangeErrorClear()
SetPaletteBpp() GFX_PaletteBppSet()
RequestPaletteChange() GFX_PaletteChangeRequest()
RequestEntirePaletteChange() GFX_EntirePaletteChangeRequest()
SetPalette() GFX_PaletteSet()
SetEntirePalette() GFX_EntirePalette()
SetPaletteFlash() GFX_PaletteFlashSet()
Header File: gfx_transitions.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
GFXIsTransitionPending No equivalent
GFXExecutePendingTransition No equivalent
GFXSetupTransition GFX_SetTransitionParameters()
GFXTransition GFX_Transition()
GFXTranslateDirection No equivalent
Header File: gfx_gol.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
GetState() GFX_GOL_ObjectStateGet()
ClearState() GFX_GOL_ObjectStateClear()
SetState() GFX_GOL_ObjectStateSet()
GOLAddObject() GFX_GOL_ObjectAdd()
GOLFindObject() GFX_GOL_ObjectFind()
GOLRedraw() GFX_GOL_ObjectListRedraw()
GOLRedrawRec() GFX_GOL_ObjectRectangleRedraw()
GOLDraw() GFX_GOL_ObjectListDraw()
GOLDrawComplete() GFX_GOL_ObjectDrawComplete()
GOLDrawCallback() GFX_GOL_DRAW_CALLBACK_FUNC
GOLFree() GFX_GOL_ObjectListFree()
GetObjType() GFX_GOL_ObjectTypeGet()
GetObjID GFX_GOL_ObjectNextGet()
GetObjNext() GFX_GOL_ObjectNext()
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GOLDeleteObject() GFX_GOL_ObjectDelete()
GOLDeleteObjectByID() GFX_GOL_ObjectByIDDelete()
GOLNewList() GFX_GOL_ObjectListNew()
GOLGetList() GFX_GOL_ObjectListGet()
GOLSetFocus() GFX_GOL_ObjectFocusSet()
IsObjUpdated() GFX_GOL_ObjectUpdated()
GOLInit() GFX_Initialize()
GOLGetFocus() GFX_GOL_ObjectFocusGet()
GOLCanBeFocused() GFX_GOL_ObjectCanBeFocused()
GOLGetFocusNext() GFX_GOL_ObjectFocusNextGet()
GOLGetFocusPrev() GFX_GOL_ObjectFocusPrevGet()
GOLPanelDraw() GFX_GOL_PanelParameterSet()
GOLPanelDrawTsk() GFX_GOL_PanelDraw()
GOLTwoTonePanelDraw() GFX_GOL_TwoTonePanelDraw()
Header File: gfx_gol_analog_clock.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
AcSetMinute() GFX_GOL_AnalogMinuteSet()
AcSetSecond() GFX_GOL_AnalogSecondSet()
AcCreate() GFX_GOL_AnalogClockCreate()
AcDraw() GFX_GOL_AnalogDraw()
AcSetHour() GFX_GOL_AnalogHourSet()
Header File: gfx_gol_button.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
BtnCreate() GFX_GOL_ButtonCreate()
BtnDraw() GFX_GOL_ButtonDraw()
BtnGetText() GFX_GOL_ButtonTextGet()
BtnSetText() GFX_GOL_ButtonTextSet()
BtnGetBitmap() GFX_GOL_ButtonPressStateImageGet()
BtnSetBitmap() GFX_GOL_ButtonPressStateImageSet()
BtnMsgDefault() GFX_GOL_ButtonActionSet()
BtnTranslateMsg() GFX_GOL_ButtonActionGet()
Header File: gfx_gol_check_box.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
CbCreate() GFX_GOL_CheckBoxCreate()
CbDraw() GFX_GOL_CheckBoxDraw()
CbGetText() GFX_GOL_CheckBoxTextGet()
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CbSetText() GFX_GOL_CheckBoxTextSet()
CbMsgDefault() GFX_GOL_CheckBoxActionSet()
CbTranslateMsg() GFX_GOL_CheckBoxActionGet()
Header File: gfx_gol_custom_control.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
No equivalent GFX_GOL_CustomControlGetPos ()
No equivalent GFX_GOL_CustomControlSetPos ()
No equivalent GFX_GOL_CustomControlCreate
No equivalent GFX_GOL_CustomControlActionGet ()
No equivalent GFX_GOL_CustomControlActionGet ()
No equivalent GFX_GOL_CustomControlActionSet ()
No equivalent GFX_GOL_CustomControlDraw ()
Header File: gfx_gol_digital_meter.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
DmCreate() GFX_GOL_DigitalMeterCreate()
DmDraw() GFX_GOL_DigitalMeterDraw()
DmGetValue() GFX_GOL_DigitalMeterValueGet()
DmSetValue() GFX_GOL_DigitalMeterValueSet()
DmDecVal() GFX_GOL_DigitalMeterDecrement()
DmIncVal() GFX_GOL_DigitalMeterIncrement()
DmTranslateMsg() GFX_GOL_DigitalMeterActionGet()
Header File: gfx_gol_edit_ box.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
EbCreate() GFX_GOL_EditBoxCreate()
EbDraw() GFX_GOL_EditBoxDraw()
EbGetText() GFX_GOL_EditBoxTextGet()
EbSetText() GFX_GOL_EditBoxTextSet()
EbAddChar() GFX_GOL_EditBoxCharAdd(()
EbDeleteChar() GFX_GOL_EditBoxCharDelete()
EbMsgDefault() GFX_GOL_EditBoxActionSet()
EbTranslateMsg() GFX_GOL_EditBoxActionGet()
Header File: gfx_gol_group_box.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
GbCreate() GFX_GOL_GroupBoxCreate()
GbDraw() GFX_GOL_GroupBoxDraw()
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GbGetText() GFX_GOL_GroupBoxTextGet()
GbSetText() GFX_GOL_GroupBoxTextGet()
GbTranslateMsg() GFX_GOL_GroupBoxActionGet()
GbCreate() GFX_GOL_GroupBoxCreate()
GbDraw() GFX_GOL_GroupBoxDraw()
Header File: gfx_gol_list_box.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
LbCreate() GFX_GOL_ListBoxCreate()
LbDraw() GFX_GOL_ListBoxDraw()
LbGetItemList() GFX_GOL_ListBoxItemListGet()
LbAddItem() GFX_GOL_ListBoxtemAdd()
LbAddItem() GFX_GOL_ListBoxItemAdd()
LbDelItem() GFX_GOL_ListBoxItemRemove()
LbChangeSel() GFX_GOL_ListBoxChangeSelection()
LbSetSel() GFX_GOL_ListBoxSelectionSet()
LbGetSel() GFX_GOL_ListBoxSelectionGet()
LbGetFocusedItem() GFX_GOL_ListBoxFocusedItemGet()
LbSetFocusedItem() GFX_GOL_ListBoxFocusedItemSet()
LbGetCount(pLb) GFX_GOL_ListBoxCountGet()
LbGetVisibleCount() GFX_GOL_ListBoxVisibleCountGet()
LbSetBitmap() GFX_GOL_ListBoxBitmapSet()
LbGetBitmap(pItem) GFX_GOL_ListBoxBitmapSet()
Header File: gfx_gol_meter.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
MtrCreate() GFX_GOL_MeterCreate()
MtrDraw() GFX_GOL_MeterDraw()
MtrSetVa() GFX_GOL_MeterValueSet()
MtrGetVal() GFX_GOL_MeterValueGet()
MtrDecVal() GFX_GOL_MeterDecrementl()
MtrIncVal GFX_GOL_MeterIncrement()
MtrSetScaleColors GFX_GOL_MeterScaleColorsSet()
MtrSetTitleFont(pMtr, pNewFont) GFX_GOL_MeterTitleFontSet()
MtrSetValueFont(pMtr, pNewFont) GFX_GOL_MeterValueFontSet()
MtrMsgDefault() GFX_GOL_MeterDefaultActionSet()
MtrTranslateMsg() GFX_GOL_MeterActionGet()
Header File: gfx_gol_picture.h
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MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
PictCreat() GFX_GOL_PictureControlCreate()
PictDraw() GFX_GOL_PictureControlDraw()
PictSetBitmap() GFX_GOL_PictureControlBitmapSet()
PictGetBitmap() GFX_GOL_PictureControlBitmapGet()
PictGetScale() GFX_GOL_PictureControlScaleGet()
PictSetScale() GFX_GOL_PictureControlScaleGet()
PictTranslateMsg() GFX_GOL_PictureControlActionGet()
Header File: gfx_gol_progress_bar.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
PbCreate() GFX_GOL_ProgressBarCreate()
PbDraw() GFX_GOL_ProgressBarDraw()
PbSetRange() GFX_GOL_ProgressBarRangeSet()
PbGetRange() GFX_GOL_ProgressBarRangeGet()
PbSetPos() GFX_GOL_ProgressBarPositionSet()
PbGetPos() GFX_GOL_ProgressBarActionSet()
PbTranslateMsg() GFX_GOL_ProgressBarActionGet()
Header File: gfx_gol_radio_button.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
RbCreate() GFX_GOL_RadioButtonCreate()
RbDraw() GFX_GOL_RadioButtonDraw()
RbGetCheck() GFX_GOL_RadioButtonCheckGet()
RbSetCheck() GFX_GOL_RadioButtonCheckGet()
RbGetText(pRb) GFX_GOL_RadioButtonTextGet()
RbSetText() GFX_GOL_RadioButtonTextGet()
RbMsgDefault() GFX_GOL_RadioButtonActionSet()
Header File: gfx_gol_scrollbar.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
SldCreate() GFX_GOL_ScrollBarCreate()
SldDraw() GFX_GOL_ScrollBarDraw()
SldSetPage() GFX_GOL_ScrollBarPageSet()
SldGetPage() GFX_GOL_ScrollBarPageGet()
SldSetPos() GFX_GOL_ScrollBarPositionSet()
SldGetPos(pSld) GFX_GOL_ScrollBarPositionGet()
SldSetRange() GFX_GOL_ScrollBarSetRange()
SldGetRange() GFX_GOL_ScrollBarRangeGet()
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SldIncPos() GFX_GOL_ScrollBarPositionIncrement()
SldDecPos() GFX_GOL_ScrollBarPositionDecrement()
SldMsgDefault() GFX_GOL_ScrollBarActionSet()
Header File: gfx_gol_static_text.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
StCreate() GFX_GOL_StaticTextCreate()
StDraw() GFX_GOL_StaticTextDraw()
StGetText() GFX_GOL_StaticTextGet()
StSetText() GFX_GOL_StaticTextSet()
StTranslateMsg() GFX_GOL_StaticTextActionGet()
Header File: gfx_gol_text_entry.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
TeCreate() GFX_GOL_TextEntryCreate()
TeDraw() GFX_GOL_TextEntryDraw()
TeGetBuffer() GFX_GOL_TextEntryBufferGet()
TeSetBuffer() GFX_GOL_TextEntryBufferSet()
TeClearBuffer() GOL_GOL_TextEntryBufferClear()
TeGetKeyCommand() GOL_GOL_TextEntryKeyCommandGet()
TeSetKeyCommand() GOL_GOL_TextEntryKeyCommandSet()
TeCreateKeyMembers() GOL_GOL_TextEntryKeyMembersCreate()
TeAddChar() GOL_GOL_TextEntryCharAdd()
TeIsKeyPressed() GOL_GOL_TextEntryKeyPressed()
TeSpaceChar() GOL_GOL_TextEntryCharSpace()
TeDelKeyMembers() GOL_GOL_TextEntryKeyMembersDelete()
TeSetKeyText() GOL_GOL_TextEntrySetKeyText()
TeMsgDefault() GOL_GOL_TextEntryActionSet()
TeTranslateMsg() GOL_GOL_TextEntryActionGet()
Header File: gfx/gfx_gol_window.h
MLA Graphics Library Function Name MPLAB Harmony Graphics Library Function Name
WndCreate() GFX_GOL_WindowCreate()
WndDraw() GFX_GOL_WindowDraw()
WndGetText() GFX_GOL_WindowTextGet()
WndSetText() GFX_GOL_WindowTextSet()
WndTranslateMsg() GFX_GOL_WindowActionGet()
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5.2.2 Graphics Object Library
5.2.2.1 Introduction
Graphics Object Library
for
Microchip Microcontrollers
This library provides the API of the Graphics Object Library that is available on the Microchip family of microcontrollers with a
convenient C language interface.
Description
This document explains how to get started with Microchip Graphics Library solution. It presents the available resources and
where to obtain these resources. It also includes the Application Programming Interface (API) of the Microchip Graphics Library.
The Microchip %LibraryName% is highly modular and is optimized for Microchip’s microcontrollers. Additionally, the library is
free for Microchip customers, easy to use, and has an open documented interface for new driver support, which requires creation
of only one C file.
The Microchip %LibraryName% Software %LibraryVersion% supports the following features:
• Configurable graphic resolution
• Up to 24-bit or 65K colors
• 2D objects such as line, circle, text, rectangle, polygon, bar
• 3D objects such as buttons, meter, dial, list box, edit box, check box, radio buttons, window, group box, slider.
• Image, animation
• Variety of user input device such as touch screen, keypad etc...
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• Multiple fonts
• Unicode fonts
• PIC24 support, PIC32 support
5.2.2.2 Release Notes
MPLAB Harmony Version: v0.70b Graphics Object Library Version : 4.00 Release Date: 18Nov2013
New This Release:
This is the first release of the library.
Known Issues:
Nothing to report in this release.
5.2.2.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.2.2.4 Using the Library
This topic describes the basic architecture of the Graphics Object Library and provides information and examples on how to use
it.
Interface Header File: gfx.h
The interface to the Graphics Object library is defined in the "gfx.h" header file. This file is included by the "app.h" file. Any C
language source (.c) file that uses the Graphics Object library should include "gfx.h".
5.2.2.4.1 Abstraction Model
This library provides the API of the Graphics Object Library that is available on the Microchip family of microcontrollers with a
convenient C language interface.
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Description
Object Layer Software Abstraction Block Diagram
The Graphics Object Layer organization is shown on the figure below:
5.2.2.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Object module.
• General Object Layer Functions
• Analog Clock Object Functions
• Button Object Functions
• Check Box Object Functions
• Chart Object Functions
• Custom Control Object Functions
• Digital Meter Object Functions
• Edit Box Object Functions
• Grid Object Functions
• Group Box Object Functions
• List Box Object Functions
• Meter Object Functions
• Progress Bar Object Functions
• Picture Object Functions
• Radio Button Object Functions
• Round Dial Object Functions
• Scrollbar Object Functions
• Static Text Object Functions
• Text Entry Object Functions
• Window Object Functions
• Draw Functions
• Image Functions
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• Palette Functions
• Style Scheme Functions
• Global Variables
• Data Types and Constants
5.2.2.4.3 How the Library Works
5.2.2.4.3.1 Objects Functionality
5.2.2.4.3.1.1 Widget Objects
All the GOL objects that will be shown in the display have a corresponding data structure that keeps and maintains its
parameters.
Each object type has a set of functions that enables the user to change the state of the object.
Each GOL object type uses a style scheme. The style scheme defines the font and color settings. User can create new style
schemes and assign it to objects. Multiple style schemes can be used for different objects.
To efficiently manage the different objects the first 9 fields of the structure for each object are defined the same. Collectively they
are referred to as the object header structure (GFX_OBJ_HEADER). Defining the GFX_OBJ_HEADER enables the common
APIs to manage the objects of different types in the same manner.
The GOL operation is centered on two major processes. First is the rendering process and second is the messaging process.
These processes make use of linked list objects. The field pNxtObj in GFX_OBJ_HEADER makes this possible. To manage the
list a global pointer _pGolObjects is utilized. It defines the current active linked list. Newly created objects are automatically
added to the end of this list. The active linked list is the list that the messaging and rendering operation parses to evaluate if the
messages received affect the objects and if objects need to be redrawn.
The use of the _pGolObjects pointer also provides a way to easily manage objects. In applications where multiple pages are
displayed on the screen, objects can be grouped according to pages. The pointer can be manipulated to switch from one page to
another depending on the page currently shown on the screen.
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Implementation of Multi-Page Objects
Users can remove an object from a list by pointer manipulation. Objects that are removed from the list are not accessible by the
rendering and messaging processes.
5.2.2.4.3.1.2 States
The GOL objects follow two types of states, the Property States and the Drawing States. Property States defines action and
appearance of objects. Drawing States on the other hand indicate if the object needs to be hidden, partially redrawn, or fully
redrawn in the display. To store the states, the field state defined in GFX_OBJ_HEADER structure is used. Six most significant
bits are allocated for Drawing States and the rest is allocated for the Property States. Some common Property States and
Drawing States are shown below.
• GFX_OBJ_STATE_FOCUSED
• GFX_OBJ_STATE_DISABLED
• GFX_OBJ_STATE_DRAW_FOCUS
• GFX_OBJ_STATE_DRAW
• GFX_OBJ_STATE_HIDE
Individual Object drawing function (e.g. BtnDraw(), SldDraw(), etc...) does not reset the draw states instead use
GFX_OBJ_Draw() to automatically reset and manage the draw states. If the call to individual drawing function cannot be
avoided, draw states must be reset manually after the drawing functions returns a 1.
5.2.2.4.3.1.3 Rendering
The library renders objects in a Non-Blocking manner. The Non-Blocking configuration is implemented by the use of drawing
state machine. Each drawing functions groups the rendering steps into states. Every time a rendering step is executed, the
drawing state is updated. Before each step is executed, the display device is checked if it is still busy with the previous rendering
operation. If it is busy it returns a non-zero value. This indicates that the draw function must be called again to complete the
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rendering. The drawing function can be called several times until rendering is completed.
State Machine Controlled Rendering
The GOL level uses the active object linked list for drawing of objects. Each object’s state in the list is parsed to determine if the
object needs to be redrawn or not. The drawing order is from the head to the tail of the list. This sequence is executed by
GFX_OBJ_Draw() function. The figure below explains the rendering loop of the GFX_OBJ_Draw() function.
GOL Object Rendering Loop
The loop shows two exit points in the sequence. First is when the end of the list is reached and the second is when an
GFX_OBJ_Draw() returns a NOT DONE status. Reaching the end of the list is a normal exit. This means that all the state
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machines of the draw functions of each object have reset to default. Exiting with a NOT DONE status means that the latest
executed draw function was pended and the object is not yet fully rendered. To complete the rendering, GFX_OBJ_Draw()
function should be called again. The next call to GFX_OBJ_Draw() will pickup the rendering on the last object that returned a not
DONE status. This operation makes the rendering functions non-blocking and gives opportunity to release control to program
without waiting for the rendering completion.
When all objects in the active object linked list are drawn GFX_OBJ_Draw() calls user defined GFX_OBJ_DrawCallback()
function. User drawing can be done in this callback function. If the function returns a zero, drawing of GOL objects in the active
list is suspended. In this case color, clipping region, line type and graphic cursor will not be modified by GOL. If it returns a 1
drawing control is returned to GOL. GFX_OBJ_Draw() resume rendering of objects in the current active list. Inside the
GFX_OBJ_DrawCallback() function, the active object list is not used by GFX_OBJ_Draw(). It is safe to perform modification of
the list. Please refer to Configuration Settings to set Blocking or Non-Blocking configuration.
5.2.2.4.3.2 Messaging Functionality
To facilitate the processing of user actions on the objects, messaging are used.
User passes messages from the input devices to GOL using the GOL message structure. (See: GFX_OBJ_MESSAGE for
structure information)
GFX_OBJ_Message() function accepts this structure and processes the message for all objects in the active list.
Messaging Flow
The messaging mechanism follows this flow:
1. User Interface Module (touch screen, keypad) sends a GOL message (the GFX_OBJ_MESSAGE structure).
2. A loop evaluates which object is affected by the message. This is done inside GFX_OBJ_Message() function.
3. Affected object returns the translated message based on the GOL message parameters.
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4. User can change default action with the callback function. If the call back function returns a non-zero value message will be
processed by default.
5. Object should be redrawn to reflect new state.
The translated message is a set of actions unique to each object type. Please refer to each object translated message ID for
details.
Objects that are disabled will not accept any messages. GFX_OBJ_Message() function must be called when GOL drawing is
completed. In this case all objects have been drawn and it is safe to change objects states. GFX_OBJ_Message() call can be
done if GFX_OBJ_Draw() function returns non-zero or inside GFX_OBJ_DrawCallback() function.
5.2.2.4.3.3 Scheme Functionality
All objects uses a style scheme structure that defines the font and colors used. Upon the object’s creation a user defined style
scheme can be assigned to the object. In the absence of the user defined scheme, the default scheme is used.
(See: GFX_GOL_OBJ_SCHEME for structure information)
TextColorDisabled and ColorDisabled are used when the object is in the disabled state. Otherwise, TextColor0, TextColor1,
Color0 and Color1 are used. When object Draw state is set to GFX_OBJ_STATE_HIDE, the CommonBkColor is used to fill area
occupied by object.
Style scheme can be created with GFX_OBJ_SchemeCreate() function that returns a pointer to the newly created
GFX_GOL_OBJ_SCHEME structure with default values automatically assigned.
The default values can be changed in the gfx_gol_scheme_default.c file.
The application code can define its own default style scheme by defining the macro GFX_SCHEMEDEFAULT in the
GraphicsConfig.h.
Then, GFX_GOL_OBJ_SCHEME GFX_OBJECT_SchemeDefault must be defined in the application code with each structure
member initialized to the desired values. See GOLSchemeDefault.c file for an example on how to initialize the style scheme.
5.2.2.5 Configuring the Library
The configuration of the Graphics Object Layer is based on the file system_config.h
This header file contains the configuration selection for the Graphics Object Layer. Based on the selections made, the Graphics
Object Layer will support or not support selected features. These configuration settings will apply to all instances of the Graphics
Object Layer.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.2.2.6 Building the Library
This section list the files that are available in the \src of the object driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
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5.2.2.7 Library Interface
Data Types and Constants
Name Description
CHARTPARAM Defines the parameters for the CHART object.
DATASERIES Defines a variable for the CHART object. It specifies the
number of samples, pointer to the array of samples for the
data series and pointer to the next data series. A member of
this structure (show) is used as a flag to determine if the
series is to be drawn or not. Together with the smplStart and
smplEnd it will determine what kind of chart will be drawn.
FileFeof This is type FileFeof.
FileRead Typedefs of the used File System APIs
FileSeek This is type FileSeek.
FileTell This is type FileTell.
FONT_ORIENTATION Types of orientation
GFX_ALIGNMENT Defines the types of text alignment. The text alignment is
used in GFX_TextStringBoxDraw().
5.2.2.7.1 General Object Layer Functions
5.2.2.7.1.1 GFX_GOL_DrawCallbackSet Function
C
void GFX_GOL_DrawCallbackSet(
GFX_GOL_DRAW_CALLBACK_FUNC pFunc
);
Description
This function sets the draw callback function that the application will use to call primitive function to implement application
specific shapes.See GFX_GOL_DRAW_CALLBACK_FUNC definition for details on the draw callback function.
Preconditions
None.
Parameters
Parameters Description
pFunc pointer to the draw callback function.
Returns
None.
Example
None.
5.2.2.7.1.2 GFX_GOL_MessageCallbackSet Function
C
void GFX_GOL_MessageCallbackSet(
GFX_GOL_MESSAGE_CALLBACK_FUNC pFunc
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);
Description
This function sets the message callback function that the application will use to evaluate user inputs that affects the objects and
application behavior. The callback function location is specified by the function pointer supplied in the call. See
GFX_GOL_MESSAGE_CALLBACK_FUNC definition for details on the message callback function.
Preconditions
None.
Parameters
Parameters Description
pFunc pointer to the message callback function.
Returns
None.
Example
None.
5.2.2.7.1.3 GFX_GOL_ObjectAdd Function
C
void GFX_GOL_ObjectAdd(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This function adds an object to the tail of the currently active list. The new list tail is set to point to NULL after the new object is
added.
Preconditions
None.
Returns
None.
Example
void MoveObject( GFX_GOL_OBJ_HEADER *pSrcList,
GFX_GOL_OBJ_HEADER *pDstList,
GFX_GOL_OBJ_HEADER *pObjtoMove)
{
GFX_GOL_OBJ_HEADER *pTemp = pSrcList;
if(pTemp != pObjtoMove)
{
while(pTemp->pNxtObj != pObjtoMove)
pTemp = pTemp->pNxtObj;
}
pTemp->pNxtObj = pObjtoMove ->pNxt; // remove object from list
GFX_GOL_ObjectListSet(pDstList); // destination as active list
GFX_GOL_ObjectAdd(pObjtoMove); // add object to active list
}
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5.2.2.7.1.4 GFX_GOL_ObjectBackGroundSet Function
C
void GFX_GOL_ObjectBackGroundSet(
GFX_GOL_OBJ_HEADER * pObjectHeader
);
Description
This function sets the background information. This is an internal function and should not be called by the application. This
function is used by object's drawing functions to set the background information.
Preconditions
None.
Returns
None.
Example
None.
5.2.2.7.1.5 GFX_GOL_ObjectByIDDelete Function
C
GFX_STATUS GFX_GOL_ObjectByIDDelete(
uint16_t id
);
Description
This function removes an object with the given user defined ID from the currently active list. Aside from the removal of the object
from the list, the RAM resources consumed by the object is also freed.
If there is no object with the given ID, the function exits with GFX_STATUS_FAILURE.
Preconditions
None.
Returns
GFX_STATUS_SUCCESS - is returned if the removal was successful. GFX_STATUS_FAILURE - is returned if the removal was
not successful.
Example
TODO:Add example code
5.2.2.7.1.6 GFX_GOL_ObjectCanBeFocused Function
C
GFX_STATUS GFX_GOL_ObjectCanBeFocused(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This function checks if the object can be focused or not. If the object can be focused, it returns GFX_STATUS_SUCCESS. If it
cannot be focused, it returns GFX_STATUS_FAILURE. Selected objects have the focus feature. Refer to the object
documentation for details.
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Objects that do not support focus feature will ignore any focus settings.
If the object is disabled it cannot be set to focused state.
Preconditions
None.
Parameters
Parameters Description
pObject pointer to the object.
Returns
GFX_STATUS_SUCCESS - when the object can be focused GFX_STATUS_FAILURE - when the object cannot be focused or
do not support the focus feature.
Example
TODO:Add example code here
5.2.2.7.1.7 GFX_GOL_ObjectDelete Function
C
GFX_STATUS GFX_GOL_ObjectDelete(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This function removes an object from the currently active list. Aside from the removal of the object from the list, the RAM
resources consumed by the object is also freed.
Preconditions
None.
Returns
GFX_STATUS_SUCCESS - is returned if the removal was successful. GFX_STATUS_FAILURE - is returned if the removal was
not successful.
Example
TODO:Add example code
5.2.2.7.1.8 GFX_GOL_ObjectDrawDisable Function
C
void GFX_GOL_ObjectDrawDisable(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This function resets the drawing state bits of the object. This function can be called to cancel any drawing state bits that has
been set or clears all the drawing state bits after the object has been redrawn.
Preconditions
None.
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Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
None.
5.2.2.7.1.9 GFX_GOL_ObjectDrawEnable Function
C
void GFX_GOL_ObjectDrawEnable(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This function sets the object to be redrawn. For the redraw to be effective, the object must be in the current active list. If not, the
redraw action will not be performed until the list where the object is currently inserted will be set as the active list.
Preconditions
None.
Parameters
Parameters Description
pObject pointer to the object that will be redrawn.
Returns
None.
Example
void GOLRedrawRec(uint16_t left, uint16_t top,
uint16_t right, uint16_t bottom)
{
GFX_GOL_OBJ_HEADER *pCurrentObj;
int overlapX, overlapY;
pCurrentObj = _pGolObjects;
while(pCurrentObj != NULL)
{
overlapX = overlapY = 0;
// check overlaps in x direction
if (((pCurrentObj->left <= left) && (pCurrentObj->right >= left)) ||
((pCurrentObj->left <= right) && (pCurrentObj->right >= right)) ||
((pCurrentObj->left <= left) && (pCurrentObj->right >= right)) ||
((pCurrentObj->left >= left) && (pCurrentObj->right <= right))
)
overlapX = 1;
// check overlaps in y direction
if (((pCurrentObj->top <= top) && (pCurrentObj->bottom >= top)) ||
((pCurrentObj->top <= bottom) && (pCurrentObj->bottom >= bottom)) ||
((pCurrentObj->top <= top) && (pCurrentObj->bottom >= bottom)) ||
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((pCurrentObj->top >= top) && (pCurrentObj->bottom <= bottom))
)
overlapY = 1;
// when any portion of the widget is touched by the defined rectangle the
// x and y overlaps will exist.
if (overlapX & overlapY) {
GFX_GOL_ObjectRedraw(pCurrentObj);
}
pCurrentObj = (GFX_GOL_OBJ_HEADER *)pCurrentObj->pNxtObj;
} //end of while
}
5.2.2.7.1.10 GFX_GOL_ObjectFind Function
C
GFX_GOL_OBJ_HEADER * GFX_GOL_ObjectFind(
uint16_t ID
);
Description
This function returns the pointer to object in the list with the user defined ID assigned to it.
Preconditions
None.
Returns
The pointer to the object in the list with the given ID.
Example
void CopyObject(GFX_GOL_OBJ_HEADER *pSrcList,
GFX_GOL_OBJ_HEADER *pDstList,
uint16_t ID)
{
GFX_GOL_OBJ_HEADER *pTemp;
// find the object
pTemp = GFX_GOL_ObjectFind(ID);
if (pTemp != NULL)
{
// destination as active list
GFX_GOL_ObjectSetList(pDstList);
// add object to active list
GFX_GOL_ObjectAdd(pTemp);
}
}
5.2.2.7.1.11 GFX_GOL_ObjectFocusGet Function
C
GFX_GOL_OBJ_HEADER * GFX_GOL_ObjectFocusGet();
Description
This function returns the pointer to the object that is currently receiving keyboard input (or focused).
If there are no object that can accept keyboard messages, then the function will return NULL.
Objects that can be focused are those objects that can receive keyboard inputs.
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Preconditions
None.
Returns
The pointer the currently focused object. Returns NULL if there is no object currently set.
Example
TODO:Add example code here
5.2.2.7.1.12 GFX_GOL_ObjectFocusNextGet Function
C
GFX_GOL_OBJ_HEADER * GFX_GOL_ObjectFocusNextGet();
Description
This function returns the pointer to the next object in the active list of objects which can be focused.
The reference point is the currently focused object. If there is no currently focused object, the searched starts from the beginning
of the active list of objects.
Objects that can be focused are those objects that can receive keyboard inputs.
If there is no object capable of receiving keyboard inputs (i.e. none can be focused) NULL is returned.
Preconditions
None.
Returns
The pointer to the object that can be focused.
Example
TODO:Add example code here
5.2.2.7.1.13 GFX_GOL_ObjectFocusPrevGet Function
C
GFX_GOL_OBJ_HEADER * GFX_GOL_ObjectFocusPrevGet();
Description
This function returns the pointer to the previous object in the active list of objects which can be focused.
The reference point is the currently focused object. If there is no currently focused object, the searched starts from the beginning
of the active list of objects.
Objects that can be focused are those objects that can receive keyboard inputs.
If there is no object capable of receiving keyboard inputs (i.e. none can be focused) NULL is returned.
Preconditions
None.
Returns
The pointer to the object that can be focused.
Example
TODO:Add example code here
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5.2.2.7.1.14 GFX_GOL_ObjectFocusSet Function
C
GFX_STATUS GFX_GOL_ObjectFocusSet(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This function sets the specified object to be focused.
If the object cannot accept keyboard messages, the object will not be set to focused state. If the object can accept keyboard
messages, then the focus state will be set and will be marked to be redrawn to show the focus when the focus feature is enabled.
Objects that can be focused are those objects that can receive keyboard inputs.
Preconditions
None.
Parameters
Parameters Description
pObject pointer to the object.
Returns
GFX_STATUS_SUCCESS - when the object can be focused GFX_STATUS_FAILURE - when the object cannot be focused or
do not support the focus feature.
Example
TODO:Add example code here
5.2.2.7.1.15 GFX_GOL_ObjectHideDraw Function
C
GFX_STATUS GFX_GOL_ObjectHideDraw(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This is function GFX_GOL_ObjectHideDraw.
5.2.2.7.1.16 GFX_GOL_ObjectIDGet Function
C
uint16_t GFX_GOL_ObjectIDGet(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This function returns the user defined ID assigned to the object.
Preconditions
None.
Returns
The user defined ID of the object.
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Example
void ExampleUsageOfGettingID(GFX_GOL_OBJ_HEADER *pObject)
{
uint16_t id;
switch(id = GFX_GOL_ObjectIDGet(pObject))
{
case ID_WINDOW1:
// do something
case ID_WINDOW2:
// do something else
case ID_WINDOW3:
// do something else
default:
// do something else
}
}
5.2.2.7.1.17 GFX_GOL_ObjectIsRedrawSet Function
C
bool GFX_GOL_ObjectIsRedrawSet(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This function checks if the object needs to be redrawn or not. The function returns true if it is to be redrawn or false if it is not to
be redrawn.
Preconditions
None.
Parameters
Parameters Description
pObject pointer to the object that will be checked.
Returns
true - when the object needs to be redrawn. false - when the object does not need to be redrawn.
Example
int DrawButtonWindowOnly()
{
static GFX_GOL_OBJ_HEADER *pCurrentObj = NULL;
uint16_t done = 0;
if (pCurrentObj == NULL)
{
// get current list
pCurrentObj = GFX_GOL_ObjectListGet();
}
while(pCurrentObj != NULL)
{
if(GFX_GOL_ObjectIsRedrawSet(pCurrentObj) == true)
{
done = pCurrentObj->draw(pCurrentObj);
// reset state of object if done
if (done)
GOLDrawComplete(pCurrentObj)
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// Return if not done. This means that Button Draw function
// was not able to finish redrawing the object
// and must be called again to finish rendering of
// objects in the list that have new states.
else
return 0;
}
// go to the next object in the list
pCurrentObj = pCurrentObj->pNxtObj;
}
return 1;
}
5.2.2.7.1.18 GFX_GOL_ObjectListDraw Function
C
GFX_STATUS GFX_GOL_ObjectListDraw();
Description
This function loops through the active list and redraws objects that need to be redrawn. Partial redrawing or full redraw is
performed depending on the drawing states of the objects.
GFX_GOL_ObjectDrawCallback() function is called by GFX_GOL_ObjectListDraw() when drawing of objects in the active list is
completed. GFX_GOL_ObjectDrawCallback() is an application implemented function that allows the application the opportunity
to insert application specific rendering using Primitive Layer rendering functions.
The GFX_GOL_ObjectListDraw() function can return with GFX_STATUS_BUSY. In this case, it indicates that the currently
redrawn object is not able to continue. Application needs to call GFX_GOL_ObjectListDraw() again to continue the redraw of the
objects in the list.
Preconditions
None.
Returns
GFX_STATUS_SUCCESS - is returned when the active list is completely parsed and redrawn. GFX_STATUS_BUSY - is
returned when the active list is not completely parsed and redrawn.
Example
// Assume objects are created & states are set to draw objects
while(1)
{
// parse active list and redraw objects
// that needs to be redrawn
if( GFX_GOL_ObjectListDraw() == GFX_STATUS_SUCCESS)
{
// at this point drawing is completed
// it is safe to modify objects states and linked list
// evaluate messages from touch screen device
TouchGetMsg(&msg);
// evaluate each object is affected by the message
GFX_GOL_ObjectMessage(&msg);
}
}
5.2.2.7.1.19 GFX_GOL_ObjectListFree Function
C
GFX_STATUS GFX_GOL_ObjectListFree();
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Description
This function frees all the memory used by objects in the active list and initializes the active list pointer to NULL to start a new
empty list. This function must be called only inside the GFX_GOL_ObjectDrawCallback() function when using
GFX_GOL_ObjectListDraw() and GFX_GOL_ObjectMessage() functions. This requirement assures that primitive rendering
settings are not altered by the rendering state machines of the objects.
Preconditions
None.
Returns
GFX_STATUS_SUCCESS - is returned if the free was successful. GFX_STATUS_FAILURE - is returned if the free was not
successful.
Example
void DeletePage(GFX_GOL_OBJ_HEADER *pPage)
{
GFX_GOL_OBJ_HEADER *pTemp;
// assuming pPage is different from the current active list
// save the active list
pTemp = GFX_GOL_ObjectListGet();
// set list as active list
GFX_GOL_ObjectListSet(pPage);
// pPage objects are deleted
GFX_GOL_ObjectListFree();
// restore the active list
GFX_GOL_ObjectListSet(pTemp);
}
5.2.2.7.1.20 GFX_GOL_ObjectListGet Function
C
GFX_GOL_OBJ_HEADER * GFX_GOL_ObjectListGet();
Description
This function returns the pointer to the current active.
Preconditions
None.
Returns
Pointer (type GFX_GOL_OBJ_HEADER) to the current active list.
Example
See GFX_GOL_ObjectListNew() for example code.
5.2.2.7.1.21 GFX_GOL_ObjectListNew Function
C
GFX_STATUS GFX_GOL_ObjectListNew();
Description
This function starts a new linked list of objects and resets the keyboard focus to none. This function assigns the current active list
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and current focused object (receiving keyboard inputs) object pointers to NULL. Any keyboard inputs at this point will be ignored.
This function does not erase the objects in the previous list. Application must save the previous list to another pointer if to be
referenced later. If not needed anymore, memory used by that list should be freed by GFX_GOL_ObjectListFree() function. In
this case, freeing the list with GFX_GOL_ObjectListFree() function has the same effect as GFX_GOL_ObjectListNew() where the
current active list is empty.
Preconditions
None.
Returns
GFX_STATUS_SUCCESS - is returned if the new list start was successful. GFX_STATUS_FAILURE - is returned if the new list
start was not successful.
Example
// assume pointers to objects (pButton, pWindow and pSlider
// are initialized to objects already created
// GFX_GOL_OBJ_HEADER *pButton;
// GFX_GOL_OBJ_HEADER *pWindow;
// GFX_GOL_OBJ_HEADER *pSlider;
GFX_GOL_OBJ_HEADER *pSave;
// save current list
pSave = GFX_GOL_ObjectListGet();
// start the new list, after the start of the list, the
// current active list is empty.
GFX_GOL_ObjectListNew();
// assume that objects are already created
// you can now add objects to the new list
GFX_GOL_ObjectAdd(pButton);
GFX_GOL_ObjectAdd(pWindow);
GFX_GOL_ObjectAdd(pSlider);
5.2.2.7.1.22 GFX_GOL_ObjectListSet Function
C
GFX_STATUS GFX_GOL_ObjectListSet(
GFX_GOL_OBJ_HEADER * pList
);
Description
This function sets the active list to the new list. The previous list will still exist in memory. Application must save the previous list
before the set is called if the previous list will be referenced later. If the previous list is not needed anymore, then the list must be
removed from memory by GFX_GOL_ObjectListFree() function.
Setting the active list to the new list will reset the focused pointer object to NULL.
Preconditions
None.
Returns
GFX_STATUS_SUCCESS - is returned if the set was successful. GFX_STATUS_FAILURE - is returned if the set was not
successful.
Example
GFX_GOL_OBJ_HEADER *pSave;
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// save current list
pSave = GFX_GOL_ObjectListSet();
// start the new list
GFX_GOL_ObjectListNew();
// you can now add objects to the current list
// assume that objects are already created
GFX_GOL_ObjectAdd(pButton);
GFX_GOL_ObjectAdd(pWindow);
GFX_GOL_ObjectAdd(pSlider);
// do something here on the new list
// return the old list
GOLSetList(pSave);
5.2.2.7.1.23 GFX_GOL_ObjectMessage Function
C
void GFX_GOL_ObjectMessage(
GFX_GOL_MESSAGE * pMsg
);
Description
This function receives a GFX_GOL_MESSAGE message from user and loops through the active list of objects to check which
object is affected by the message. For affected objects the message is translated and GFX_GOL_ObjectMessageCallback() is
called. In the call back function, user has the ability to implement action for the message. If the call back function returns
non-zero, OBJMsgDefault() is called to process message for the object by default. If zero is returned OBJMsgDefault() is not
called. Please refer to GOL Messages section for details.
Preconditions
None.
Parameters
Parameters Description
pMessage Pointer to the message from user.
Returns
None.
Example
// Assume objects are created & states are set to draw objects
while (1)
{
if(GOLDraw())
{
// GOL drawing is completed here
// it is safe to change objects
// from user interface module
TouchGetMsg(&msg);
// process the message
GFX_GOL_ObjectMessage(&msg);
}
}
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5.2.2.7.1.24 GFX_GOL_ObjectNextGet Function
C
GFX_GOL_OBJ_HEADER * GFX_GOL_ObjectNextGet(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This function returns the pointer to next object in the list after the specified object.
Preconditions
None.
Returns
The pointer to the next object in the list.
Example
void RedrawButtons(void)
{
GFX_GOL_OBJ_HEADER *pCurr;
// get active list
pCurr = GFX_GOL_ObjectListGet();
while(pCurr->pNxtObj != NULL)
{
// just select button objects and redraw them
if (GFX_GOL_ObjectTypeGet(pCurr) == BUTTON)
{
// set to be redrawn
pCurr->state = BTN_DRAW;
}
pCurr = GFX_GOL_ObjectNextGet(pCurr);
}
// redraw all buttons in the active list
GFX_GOL_ObjectListDraw();
}
5.2.2.7.1.25 GFX_GOL_ObjectRectangleRedraw Function
C
void GFX_GOL_ObjectRectangleRedraw(
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom
);
Description
This function marks all objects in the active list intersected by the given rectangular area to be redrawn.
After calling this function, the next call to GFX_GOL_ObjectListDraw() will redraw all objects that are marked for redraw.
Preconditions
None.
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Parameters
Parameters Description
left Defines the left most border of the rectangle area.
top Defines the top most border of the rectangle area.
right Defines the right most border of the rectangle area.
bottom Defines the bottom most border of the rectangle area.
Returns
None.
Example
GFX_GOL_OBJ_HEADER *pTemp;
GFX_GOL_OBJ_HEADER *pAllObjects;
// assume *pAllObjects points to a list of all existing objects
// created and initialized
// mark all objects inside the rectangle to be redrawn
GOLRedrawRec(10,10,100,100);
// save the current active list
pTemp = pAllObjects;
// reset active list
GFX_GOL_ObjectListNew();
// build the new active list with only those objects that
// are marked to be redrawn
while(pTemp->pNxtObj != NULL)
{
if (pTemp->state&0x7C00)
GFX_GOL_ObjectAdd(pTemp);
pTemp = pTemp->pNxtObj;
}
// redraw active list
GFX_GOL_ObjectListDraw();
5.2.2.7.1.26 GFX_GOL_ObjectTypeGet Function
C
GFX_GOL_OBJ_TYPE GFX_GOL_ObjectTypeGet(
GFX_GOL_OBJ_HEADER * pObject
);
Description
This function returns the object type. The object type is one of the defined enumerated types of GFX_GOL_OBJ_TYPE.
Preconditions
None.
Returns
The type of the object. The type is one of the defined enumerated types of GFX_GOL_OBJ_TYPE.
Example
TODO:Add example code here
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5.2.2.7.1.27 GFX_GOL_PanelAlphaParameterSet Function
C
void GFX_GOL_PanelAlphaParameterSet(
uint16_t alphaValue
);
Description
This is function GFX_GOL_PanelAlphaParameterSet.
5.2.2.7.1.28 GFX_GOL_PanelBackgroundSet Function
C
void GFX_GOL_PanelBackgroundSet(
GFX_GOL_OBJ_HEADER * pObjectHeader
);
Description
This is function GFX_GOL_PanelBackgroundSet.
5.2.2.7.1.29 GFX_GOL_PanelDraw Function
C
GFX_STATUS GFX_GOL_PanelDraw();
Description
This is function GFX_GOL_PanelDraw.
5.2.2.7.1.30 GFX_GOL_PanelGradientParameterSet Function
C
void GFX_GOL_PanelGradientParameterSet(
GFX_COLOR startColor,
GFX_COLOR endColor
);
Description
This is function GFX_GOL_PanelGradientParameterSet.
5.2.2.7.1.31 GFX_GOL_PanelParameterSet Function
C
void GFX_GOL_PanelParameterSet(
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t radius,
GFX_COLOR faceClr,
GFX_COLOR embossLtClr,
GFX_COLOR embossDkClr,
GFX_RESOURCE_HDR * pBitmap,
GFX_FILL_STYLE fillStyle,
uint16_t embossSize
);
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Description
This is function GFX_GOL_PanelParameterSet.
5.2.2.7.1.32 GFX_GOL_TwoTonePanelDraw Function
C
GFX_STATUS GFX_GOL_TwoTonePanelDraw();
Description
This is function GFX_GOL_TwoTonePanelDraw.
5.2.2.7.2 Analog Clock Object Functions
5.2.2.7.2.1 GFX_AnalogClockCreate Function
C
GFX_GOL_ANALOGCLOCK * GFX_AnalogClockCreate(
uint16_t ID,
short left,
short top,
short right,
short bottom,
short hour,
short minute,
short radius,
bool sechand,
uint16_t state,
void * pBitmap,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a analog clock at the given position using state, radius, pBitmap, pText, and pScheme.
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
hour Initial hour value.
minute Initial minute value.
radius Sets the radius of the clock.
sechand Flag to indicate if the second hand will be drawn or not.
state Sets the initial state of the object.
pBitmap Pointer to the bitmap used on the face of the analog clock dimension of the image
must match the dimension of the widget.
pScheme Pointer to the style scheme used
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Returns
Returns a pointer to the digital meter.
Example
GFX_GOL_SCHEME *pScheme;
uint16_t state;
pScheme = GFX_GOL_SCHEMeCreate();
state = AC_DRAW;
AnalogClock = GFX_AnalogClock_Create(ANALOGCLOCK_ID, 20, 64, 50, 118,
1, 20, 30, FALSE, state, NULL, pScheme);
Remarks:
5.2.2.7.2.2 GFX_GOL_AnalogClockDraw Function
C
GFX_STATUS GFX_GOL_AnalogClockDraw(
void * pAc
);
Description
This function renders the object on the screen using the current parameter settings. Location of the object is determined by the
left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined by
the style scheme set.
Preconditions
Object must be created before this function is called.
Parameters
Parameters Description
pAc Pointer to the object to be rendered.
Returns
Returns the status of the drawing
• 1 - If the rendering was completed and
• 0 - If the rendering is not yet finished.
Next call to the function will resume the rendering on the pending drawing state.
Side Effects
none
Example
void MyGOLDraw(){
static GFX_OBJ_HEADER *pCurrentObj = NULL;
int done;
// There are no objects
if(GFX_OBJ_ListGet() == NULL)
return;
// If it's last object jump to head
if(pCurrentObj == NULL)
pCurrentObj = GFX_OBJ_ListGet();
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done = 0;
// this only process Button and Window
while(pCurrentObj != NULL){
// check if object state indicates redrawing
if(pCurrentObj->state&0xFC00) {
switch(pCurrentObj->type){
case OBJ_ANALOGCLOCK:
done = AcDraw((ANALOGCLOCK*)pCurrentObj);
break;
case OBJ_WINDOW:
done = WndDraw((WINDOW*)pCurrentObj);
break;
default:
done = 1;
break;
}
if(done){
// reset only the state if drawing was finished
pCurrentObj->state = 0;
}else{
// done processing the list
return;
}
}
// go to next object
pCurrentObj = pCurrentObj->pNxtObj;
}
}
5.2.2.7.2.3 GFX_GOL_AnalogClockHandsDraw Function
C
GFX_STATUS GFX_GOL_AnalogClockHandsDraw(
GFX_GOL_ANALOGCLOCK * pAc,
short hand,
short thickness,
GFX_COLOR color
);
Description
Draws the current position of the clock hands with the given thickness and color.
Preconditions
none
Parameters
Parameters Description
pAc The pointer to the object whose hands will be modified.
hand which hand to be drawn (second, minute, hour)
thickness thickness to draw the hand
color color to draw the hand
*pBitmap bitmap background to be redrawn
Returns
none
Side Effects
none
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5.2.2.7.2.4 GFX_GOL_AnalogClockHourSet Function
C
void GFX_GOL_AnalogClockHourSet(
GFX_GOL_ANALOGCLOCK * pAc,
short hour
);
Description
Sets the hour value of the analog clock.
Preconditions
none
Parameters
Parameters Description
pAc The pointer to the object whose hands will be modified.
hour New hour time.
Returns
none
Side Effects
none
5.2.2.7.2.5 GFX_GOL_AnalogClockMinuteSet Function
C
void GFX_GOL_AnalogClockMinuteSet(
GFX_GOL_ANALOGCLOCK * pAc,
short minute
);
Description
Sets the minute value of the analog clock.
Preconditions
none
Parameters
Parameters Description
pAc The pointer to the object whose hands will be modified.
minute New minute time.
Returns
none
Side Effects
none
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5.2.2.7.2.6 GFX_GOL_AnalogClockSecondSet Function
C
void GFX_GOL_AnalogClockSecondSet(
GFX_GOL_ANALOGCLOCK * pAc,
short second
);
Description
Sets the second value of the analog clock.
Preconditions
none
Parameters
Parameters Description
pAc The pointer to the object whose hands will be modified.
second New second time.
Returns
none
Side Effects
none
5.2.2.7.3 Button Object Functions
5.2.2.7.3.1 GFX_GOL_ButtonActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_ButtonActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_BUTTON_ACTION_PRESSED Touch
Screen
EVENT_PRESS,
EVENT_MOVE
If events occurs and the x,y position falls
in the face of the GFX_GOL_BUTTON
while the GFX_GOL_BUTTON is not
pressed.
Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed
matches the object’s ID and
parameter 2 passed matches
SCAN_CR_PRESSED or
SCAN_SPACE_PRESSED while the
GFX_GOL_BUTTON is not pressed.
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GFX_GOL_BUTTON_ACTION_STILLPRESSED Touch
Screen
EVENT_STILLPRESS If event occurs and the x,y position does
not change from the previous press
position in the face of the
GFX_GOL_BUTTON.
GFX_GOL_BUTTON_ACTION_RELEASED Touch
Screen
EVENT_RELEASE If the event occurs and the x,y position
falls in the face of the
GFX_GOL_BUTTON while the
GFX_GOL_BUTTON is pressed.
Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed
matches the object’s ID and
parameter 2 passed matches
SCAN_CR_RELEASED or
SCAN_SPACE_RELEASED while the
GFX_GOL_BUTTON is pressed.
GFX_GOL_BUTTON_ACTION_CANCELPRESS Touch
Screen
EVENT_MOVE If the event occurs outside the face of the
GFX_GOL_BUTTON and the
GFX_GOL_BUTTON is currently pressed.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_BUTTON_ACTION_PRESSED – Object is pressed
• GFX_GOL_BUTTON_ACTION_RELEASED – Object is released
• GFX_GOL_BUTTON_ACTION_CANCELPRESS – Object will be released, user cancels press action on the
GFX_GOL_BUTTON
• GFX_GOL_OBJECT_ACTION_INVALID – Object is not affected
Example
None.
5.2.2.7.3.2 GFX_GOL_ButtonActionSet Function
C
void GFX_GOL_ButtonActionSet(
GFX_GOL_TRANSLATED_ACTION translatedMsg,
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function performs the state change of the object based on the translated action. This change can be overridden by the
application using the application defined GFX_GOL_MESSAGE_CALLBACK_FUNC. When the user message is determined to
affect the object, application can perform the state change in the message callback function. The following state changes are
supported:
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Translated Message Input Source Set/Clear State Bit Description
GFX_GOL_BUTTON_ACTION_PRESSED Touch
Screen,
Set
GFX_GOL_BUTTON_PRESSED_STATE
Button will be
redrawn in the
pressed state.
Keyboard
GFX_GOL_BUTTON_ACTION_RELEASED Touch
Screen,
Clear
GFX_GOL_BUTTON_PRESSED_STATE
Button will be
redrawn in the
released state.
Keyboard
GFX_GOL_BUTTON_ACTION_CANCELPRESS Touch
Screen,
Clear
GFX_GOL_BUTTON_PRESSED_STATE
Button will be
redrawn in the
released state.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
translatedMsg The action of the object based on the message.
pObject The pointer to the object whose state will be modified.
pMessage The pointer to the original message.
Returns
None.
Example
None.
5.2.2.7.3.3 GFX_GOL_ButtonCreate Function
C
GFX_GOL_BUTTON * GFX_GOL_ButtonCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t radius,
uint16_t state,
GFX_RESOURCE_HDR * pPressImage,
GFX_RESOURCE_HDR * pReleaseImage,
GFX_XCHAR * pText,
GFX_ALIGNMENT alignment,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_BUTTON object with the parameters given. It automatically attaches the new object into a
global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The object allows setting two images. One for the pressed state and the other for the release state. If no image is to be used for
the object set both pointers to NULL.
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If only one image is used for both pressed and released state, set both pPressImage and pReleaseImage to the same image.
The behavior of GFX_GOL_ButtonCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• pPressImage and pReleaseImage is not pointing to a GFX_RESOURCE_HDR.
• pText is an unterminated string
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
radius Radius of the rounded edge. When using gradient buttons and radius != 0,
emboss size <= radius. If this is not met, the the GFX_GOL_BUTTON face will not
have gradient effect.
state Sets the initial state of the object.
pPressImage Pointer to the image used on the face of the object when it is in the pressed state.
pReleaseImage Pointer to the image used on the face of the object when it is in the pressed state.
pText Pointer to the text of the object.
alignment text alignment of the text used in the object.
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
GFX_GOL_OBJ_SCHEME *pScheme;
GFX_GOL_BUTTON *buttons[3];
GFX_GOL_BUTTON_STATE state;
// assume pScheme is initialized to a scheme in memory.
state = GFX_GOL_BUTTON_DRAW_STATE;
buttons[0] = GFX_GOL_ButtonCreate(
1, 20, 64, 50, 118, 0,
state, NULL, NULL, "ON",
GFX_ALIGN_HCENTER | GFX_ALIGN_VCENTER,
pScheme);
// check if GFX_GOL_BUTTON 0 is created
if (buttons[0] == NULL)
return 0;
buttons[1] = GFX_GOL_ButtonCreate(
2, 52, 64, 82, 118, 0,
state, NULL, NULL, "OFF",
GFX_ALIGN_LEFT | GFX_ALIGN_VCENTER,
pScheme);
// check if GFX_GOL_BUTTON 1 is created
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if (buttons[1] == NULL)
return 0;
buttons[2] = GFX_GOL_ButtonCreate(
3, 84, 64, 114, 118, 0,
state, NULL, NULL, "HI",
GFX_ALIGN_RIGHT | GFX_ALIGN_VCENTER,
pScheme);
// check if GFX_GOL_BUTTON 2 is created
if (buttons[2] == NULL)
return 0;
return 1;
5.2.2.7.3.4 GFX_GOL_ButtonDraw Function
C
GFX_STATUS GFX_GOL_ButtonDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
The text on the face of the GFX_GOL_BUTTON is drawn on top of the bitmap. Text alignment based on the alignment
parameter set on the object.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.3.5 GFX_GOL_ButtonTextAlignmentGet Function
C
GFX_ALIGNMENT GFX_GOL_ButtonTextAlignmentGet(
GFX_GOL_BUTTON * pObject
);
Description
This function returns the text alignment of the text string used by the object.
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Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The text alignment set in the object. See GFX_ALIGNMENT for more details.
Example
None.
5.2.2.7.3.6 GFX_GOL_ButtonTextAlignmentSet Function
C
void GFX_GOL_ButtonTextAlignmentSet(
GFX_GOL_BUTTON * pObject,
GFX_ALIGNMENT align
);
Description
This function sets the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
align The alignment set for the text in the object. See GFX_ALIGNMENT for more
details.
Returns
None.
Example
None.
5.2.2.7.3.7 GFX_GOL_ButtonTextSet Function
C
void GFX_GOL_ButtonTextSet(
GFX_GOL_BUTTON * pObject,
GFX_XCHAR * pText
);
Description
This function sets the address of the current text string used by the object.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject pointer to the object.
pText pointer to the text string to be used.
Returns
None.
Example
GFX_XCHAR Label0[] = “ON―;
GFX_XCHAR Label1[] = “OFF―;
GFX_GOL_BUTTON GFX_GOL_BUTTON[2];
GFX_GOL_ButtonTextSet(GFX_GOL_BUTTON[0], Label0);
GFX_GOL_ButtonTextSet(GFX_GOL_BUTTON[1], Label1);
5.2.2.7.4 Check Box Object Functions
5.2.2.7.4.1 GFX_GOL_CheckBoxActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_CheckBoxActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_CHECKBOX_ACTION_CHECKED Touch
Screen
EVENT_RELEASE If events occurs and the x,y position falls in
the area of the check box while the check
box is unchecked.
Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed
matches the object's ID and parameter 2
passed matches SCAN_CR_PRESSED or
SCAN_SPACE_PRESSED while the check
box is unchecked.
GFX_GOL_CHECKBOX_ACTION_UNCHECKED Touch
Screen
EVENT_RELEASE If events occurs and the x,y position falls in
the area of the check box while the check
box is checked.
Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed
matches the object's ID and parameter 2
passed matches SCAN_CR_PRESSED or
SCAN_SPACE_PRESSED while the check
box is checked.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
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Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_CHECKBOX_ACTION_CHECKED - Check box is checked
• GFX_GOL_CHECKBOX_ACTION_UNCHECKED - Check box is unchecked
• GFX_GOL_OBJECT_ACTION_INVALID - Object is not affected
Example
None.
5.2.2.7.4.2 GFX_GOL_CheckBoxActionSet Function
C
void GFX_GOL_CheckBoxActionSet(
GFX_GOL_TRANSLATED_ACTION translatedMsg,
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function performs the state change of the object based on the translated action. This change can be overridden by the
application using the application defined GFX_GOL_MESSAGE_CALLBACK_FUNC. When the user message is determined to
affect the object, application can perform the state change in the message callback function. The following state changes are
supported:
Translated Message Input Source Set/Clear State Bit Description
GFX_GOL_CHECKBOX_ACTION_CHECKED Touch Screen, Set
GFX_GOL_CHECKBOX_CHECKED_STATE
Check Box
will be
redrawn in
checked
state.
Keyboard
GFX_GOL_CHECKBOX_ACTION_UNCHECKED Touch Screen, Clear
GFX_GOL_CHECKBOX_CHECKED_STATE
Check Box
will be
redrawn in
un-checked
state.
Keyboard
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
translatedMsg The action of the object based on the message.
pObject The pointer to the object whose state will be modified.
pMessage The pointer to the original message.
Returns
None.
Example
None.
5.2.2.7.4.3 GFX_GOL_CheckBoxCreate Function
C
GFX_GOL_CHECKBOX * GFX_GOL_CheckBoxCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
GFX_XCHAR * pText,
GFX_ALIGNMENT alignment,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_CHECKBOX object with the parameters given. It automatically attaches the new object into a
global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The behavior of GFX_GOL_CheckBoxCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• pText is an unterminated string
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
pText Pointer to the text of the object.
alignment text alignment of the text used in the object.
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pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
GFX_GOL_OBJ_SCHEME *pScheme;
GFX_GOL_CHECKBOX *pCb[2];
pCb[0] = GFX_GOL_CheckBoxCreate(
ID_CHECKBOX1, // ID
20,135,150,175, // dimension
GFX_GOL_CHECKBOX_DRAW_STATE, // Draw the object
"Scale", // text
GFX_ALIGN_CENTER, // text alignment
pScheme); // use this scheme
pCb[1] = GFX_GOL_CheckBoxCreate(
ID_CHECKBOX2, // ID
170,135,300,175, // dimension
GFX_GOL_CHECKBOX_DRAW_STATE, // Draw the object
"Animate", // text
GFX_ALIGN_LEFT | GFX_ALIGN_VCENTER, // text alignment
pScheme); // use this scheme
5.2.2.7.4.4 GFX_GOL_CheckBoxDraw Function
C
GFX_STATUS GFX_GOL_CheckBoxDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
The text on the GFX_GOL_CHECKBOX is drawn with the text alignment based on the alignment parameter set on the object.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
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5.2.2.7.4.5 GFX_GOL_CheckBoxTextAlignmentGet Function
C
GFX_ALIGNMENT GFX_GOL_CheckBoxTextAlignmentGet(
GFX_GOL_CHECKBOX * pObject
);
Description
This function returns the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The text alignment set in the object. See GFX_ALIGNMENT for more details.
Example
None.
5.2.2.7.4.6 GFX_GOL_CheckBoxTextAlignmentSet Function
C
void GFX_GOL_CheckBoxTextAlignmentSet(
GFX_GOL_CHECKBOX * pObject,
GFX_ALIGNMENT align
);
Description
This function sets the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
align The alignment set for the text in the object. See GFX_ALIGNMENT for more
details.
Returns
None.
Example
None.
5.2.2.7.4.7 GFX_GOL_CheckBoxTextSet Function
C
void GFX_GOL_CheckBoxTextSet(
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GFX_GOL_CHECKBOX * pObject,
GFX_XCHAR * pText
);
Description
This function sets the address of the current text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pText pointer to the text string to be used.
Returns
None.
Example
GFX_XCHAR Label0[] = “Enabled―;
GFX_XCHAR Label1[] = “Disabled―;
GFX_GOL_CHECKBOX GFX_GOL_CHECKBOX[2];
GFX_GOL_CheckBoxTextSet(GFX_GOL_CHECKBOX[0], Label0);
GFX_GOL_CheckBoxTextSet(GFX_GOL_CHECKBOX[1], Label1);
5.2.2.7.5 Chart Object Functions
5.2.2.7.5.1 GFX_GOL_ChartActionGet Function
C
uint16_t GFX_GOL_ChartActionGet(
void * pObj,
GFX_GOL_MESSAGE * pMsg
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
translated messages for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Events Description
CH_MSG_SELECTED Touch
Screen
EVENT_PRESS,
EVENT_RELEASE,
EVENT_MOVE
If events occurs and the x,y position falls in the area of the
chart.
OBJ_MSG_INVALID Any Any If the message did not affect the object.
Preconditions
none
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Parameters
Parameters Description
pCh The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMsg Pointer to the message struct containing the message from the user interface.
Returns
Returns the translated message depending on the received GOL message:
• CH_MSG_SELECTED – Chart area is selected
• OBJ_MSG_INVALID – Chart is not affected
none.
Side Effects
none
5.2.2.7.5.2 GFX_GOL_ChartCreate Function
C
GFX_GOL_CHART * GFX_GOL_ChartCreate(
uint16_t ID,
short left,
short top,
short right,
short bottom,
uint16_t state,
DATASERIES * pData,
CHARTPARAM * pParam,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a CHART object with the parameters given. It automatically attaches the new object into a global linked list
of objects and returns the address of the object.
Preconditions
none
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
pData Pointer to the data for the contents of the chart. NULL can be assigned initially
when creating the object.
pParam Pointer to the chart parameters. NULL can be assigned initially when creating the
object and the chart parameters can be populated using the API provided.
pScheme Pointer to the style scheme used. When set to NULL, the default style scheme will
be used.
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Returns
Returns the pointer to the object created.
Side Effects
none
Example
extern const FONT_FLASH GOLSmallFont;
extern const FONT_FLASH GOLMediumFont;
// Note that strings are declared as such to cover cases
// where XCHAR type is declared as short (2 bytes).
XCHAR ChTitle[] = {'E','x','a','m','p','l','e',0};
XCHAR SampleName[] = {'C','a','t','e','g','o','r','y',0};
XCHAR ValueName[] = {'#','H','i','t','s',0};
XCHAR SeriesName[2] = {
{'V','1',0},
{'V','2',0},
};
V1Data[2] = { 50, 100};
V2Data[2] = { 5, 10};
GFX_OBJ_SCHEME *pScheme;
CHART *pChart;
CHARTPARAM Contents;
uint16_t state;
pScheme = GFX_OBJ_SchemeCreate();
state = CH_BAR|CH_DRAW|CH_BAR_HOR; // GFX_PRIM_BarDraw Chart to be drawn with horizontal
orientation
pChart = ChCreate(0x01, // ID
0, 0, // dimensions
GFX_PRIM_GetMaxX(),
GFX_PRIM_GetMaxY(),
state, // state of the chart
NULL, // data not initialized yet
NULL, // no parameters yet
pScheme); // style scheme used
if (pMyChart == NULL) // check if chart was allocated memory
return 0;
ChSetTitleFont(pChart, (void*)&GOLMediumFont);
ChSetTitle(pChart, ChTitle); // set the title
// set the grid labels and axis labels font
ChSetGridLabelFont(pChart, (void*)&GOLSmallFont);
ChSetAxisLabelFont(pChart, (void*)&GOLSmallFont);
// set the labels for the X and Y axis
ChSetSampleLabel(pChart, (XCHAR*)SampleName);
ChSetValueLabel(pChart, (XCHAR*)ValueName);
ChAddDataSeries(pChart, 2, V1Data, (XCHAR*)SeriesName[0]);
ChAddDataSeries(pChart, 2, V2Data, (XCHAR*)SeriesName[1]);
// set the range of the sample values
ChSetValueRange(pChart, 0, 100);
// show all two samples to be displayed (start = 1, end = 2)
ChSetSampleRange(pChart, 1, 2);
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GFX_OBJ_Draw(); // draw the chart
5.2.2.7.5.3 GFX_GOL_ChartDataSeriesAdd Function
C
DATASERIES * GFX_GOL_ChartDataSeriesAdd(
GFX_GOL_CHART * pCh,
uint16_t nSamples,
uint16_t * pData,
XCHAR * pName
);
Description
This function creates a DATASERIES object and populates the structure with the given parameters.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the chart object.
nSamples The number of samples or data points.
pData Pointer to the array of samples or data points.
pName Pointer to the string used to label the data series.
Returns
Returns the pointer to the data variable (DATASERIES) object created. If NULL is returned, the addition of the new object failed
due to not enough memory for the object.
Side Effects
Appends to the list of DATASERIES that the chart is operating on. By default, the show flag of the newly added data series is set
to SHOW_DATA or enabled.
Example
See ChCreate() example.
5.2.2.7.5.4 GFX_GOL_ChartDataSeriesFree Function
C
void GFX_GOL_ChartDataSeriesFree(
void * pObj
);
Description
This function removes DATASERIES object from the list of DATASERIES objects and frees the memory used of that removed
object.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the chart object.
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Returns
none.
Side Effects
none.
Example
void ClearChartData(CHART *pCh) {
if(pCh->pChData != NULL)
// remove the all data series
ChFreeDataSeries(pCh;
}
5.2.2.7.5.5 GFX_GOL_ChartDataSeriesRemove Function
C
void GFX_GOL_ChartDataSeriesRemove(
GFX_GOL_CHART * pCh,
uint16_t number
);
Description
This function removes DATASERIES object from the list of DATASERIES objects and frees the memory used of that removed
object. The position of the object to be removed is specified by the number parameter. If the list has only one member, it
removes the member regardless of the number given.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the chart object.
number The position of the object to be removed in the list where the first object in the list
is assigned a value of 1. If this parameter is set to zero, the whole list of
DATA_SERIES is removed.
Returns
none.
Side Effects
none.
Example
void ClearChartData(CHART *pCh) {
if(pCh->pChData != NULL)
// remove the all data series
ChRemoveDataSeries(pCh, 0);
}
5.2.2.7.5.6 GFX_GOL_ChartDataSeriesSet Function
C
short GFX_GOL_ChartDataSeriesSet(
GFX_GOL_CHART * pCh,
uint16_t seriesNum,
BYTE status
);
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Description
This is function GFX_GOL_ChartDataSeriesSet.
5.2.2.7.5.7 GFX_GOL_ChartDraw Function
C
uint16_t GFX_GOL_ChartDraw(
void * pObj
);
Description
This function renders the object on the screen using the current parameter settings. Location of the object is determined by the
left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined by
the style scheme set.
The colors of the bars of the bar chart or sectors of the pie chart can be the default color table or user defined color table set by
ChSetColorTable() function.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Preconditions
Object must be created before this function is called.
Parameters
Parameters Description
pCh Pointer to the object to be rendered.
Returns
Returns the status of the drawing
• 1 - If the rendering was completed and
• 0 - If the rendering is not yet finished.
Next call to the function will resume the rendering on the pending drawing state.
Side Effects
none.
5.2.2.7.5.8 GFX_GOL_ChartPercentRangeSet Function
C
void GFX_GOL_ChartPercentRangeSet(
GFX_GOL_CHART * pCh,
uint16_t min,
uint16_t max
);
Description
This function sets the minimum and maximum range of percentage that the bar chart will show. The criteria is that min <= max.
This affects bar charts only and CH_PERCENTAGE bit state is set.
Preconditions
none
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Parameters
Parameters Description
pCh Pointer to the chart object.
min Minimum percentage value that will be displayed in the bar chart.
max Maximum percentage value that will be displayed in the bar chart.
Returns
none.
Side Effects
none.
5.2.2.7.5.9 GFX_GOL_ChartSampleRangeSet Function
C
void GFX_GOL_ChartSampleRangeSet(
GFX_GOL_CHART * pCh,
uint16_t start,
uint16_t end
);
Description
This function sets the sample start and sample end when drawing the chart. Together with the data series' SHOW_DATA flags
the different way of displaying the chart data is achieved.
Start & End
Value
The #
of Data
Series
Flag Set
Chart Description
Start <= End 1 Show the data indicated by Start and End points of the DATASERIES with the flag set
Start = End 1 Show the data indicated by Start or End points of the DATASERIES with the flag set
Start, End =
don't care
> 1 Show the data indicated by Start point of the DATASERIES with the flag set. Each samples of all
checked data series are grouped together according to sample number.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the chart object.
start Start point of the data samples to be displayed.
end End point of the data samples to be displayed.
Returns
none.
Side Effects
none.
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Example
See ChCreate() example.
5.2.2.7.5.10 GFX_GOL_ChartValueRangeSet Function
C
void GFX_GOL_ChartValueRangeSet(
GFX_GOL_CHART * pCh,
uint16_t min,
uint16_t max
);
Description
This function sets the minimum and maximum range of values that the bar chart will show. The criteria is that min <= max.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the chart object.
min Minimum value that will be displayed in the bar chart.
max Maximum value that will be displayed in the bar chart.
Returns
none.
Side Effects
none.
5.2.2.7.6 Custom Control Object Functions
5.2.2.7.6.1 GFX_GOL_CustomControlActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_CustomControlActionGet(
void * pObj,
GFX_GOL_MESSAGE * pMsg
);
Description
translates the GOL message for the custom control
Preconditions
none
Parameters
Parameters Description
pMsg pointer to the GOL message
pCc the pointer to the custom control
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Returns
translated message for the custom control
Side Effects
none
Remarks
none
5.2.2.7.6.2 GFX_GOL_CustomControlActionSet Function
C
void GFX_GOL_CustomControlActionSet(
GFX_GOL_TRANSLATED_ACTION translatedMsg,
void * pObj,
GFX_GOL_MESSAGE * pMsg
);
Description
changes the state of the object
Preconditions
none
Parameters
Parameters Description
pMsg pointer to the GOL message
pCc the pointer to the custom control
Returns
none
Side Effects
none
Remarks
none
5.2.2.7.6.3 GFX_GOL_CustomControlCreate Function
C
GFX_GOL_CUSTOMCONTROL * GFX_GOL_CustomControlCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
creates the custom control
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Preconditions
none
Parameters
Parameters Description
ID instance unique ID
left, top, right, bottom dimensions of the object
state state of the object
pScheme pointer to the style scheme
Returns
returns the pointer to the object created
Side Effects
none
Remarks
none
5.2.2.7.6.4 GFX_GOL_CustomControlDraw Function
C
GFX_STATUS GFX_GOL_CustomControlDraw(
void * pObj
);
Description
draws custom control
Preconditions
none
Parameters
Parameters Description
pCc pointer to the custom control
Returns
returns the status of the drawing 0 - not completed 1 - done
Side Effects
none
Remarks
none
5.2.2.7.7 Digital Meter Object Functions
5.2.2.7.7.1 GFX_GOL_DigitalMeterActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_DigitalMeterActionGet(
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void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_DIGITALMETER_ACTION_SELECTED Touch
Screen
EVENT_PRESS,
EVENT_RELEASE
If events occurs and the x,y position falls in
the area of the Digital Meter.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_DIGITALMETER_ACTION_SELECTED ? Object is selected.
• GFX_GOL_OBJECT_ACTION_INVALID ? Object is not affected
Example
None.
5.2.2.7.7.2 GFX_GOL_DigitalMeterCreate Function
C
GFX_GOL_DIGITALMETER * GFX_GOL_DigitalMeterCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
uint32_t value,
uint8_t NoOfDigits,
uint8_t DotPos,
GFX_ALIGNMENT alignment,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_DIGITALMETER object with the parameters given. It automatically attaches the new object
into a global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
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Preconditions
None.
Parameters
Parameters Description
instance Device instance
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
value Sets the initial value to be displayed
NoOfDigits Sets the number of digits to be displayed
DotPos Sets the position of decimal point in the display
alignment text alignment of the text used in the object.
pScheme Pointer to the style scheme. Set to NULL if default style scheme is used.
Returns
Pointer to the newly created object.
Example
GFX_GOL_OBJ_SCHEME *pScheme;
GFX_GOL_DIGITALMETER *pDm;
pScheme = GFX_GOL_SchemeCreate();
state = GFX_GOL_DIGITALMETER_DRAW_STATE |
GFX_GOL_DIGITALMETER_FRAME_STATE;
GFX_GOL_DigitalMeterCreate(
ID_DIGITALMETER1, // ID
30,80,235,160, // dimension
state, // has frame and center aligned
789,4,1, // to display 078.9
GFX_ALIGN_CENTER,
pScheme); // use given scheme
// draw the objects
while(GFX_GOL_ObjectListDraw() != GFX_STATUS_SUCCESS);
5.2.2.7.7.3 GFX_GOL_DigitalMeterDecrement Function
C
void GFX_GOL_DigitalMeterDecrement(
GFX_GOL_DIGITALMETER * pObject,
uint16_t delta
);
Description
This function decrements the meter value by the given delta value set. If the delta given is less than the minimum value of the
meter, the value will remain to be at minimum.
Object must be redrawn after this function is called to reflect the changes to the object.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
See GFX_GOL_DigitalMeterIncrement().
5.2.2.7.7.4 GFX_GOL_DigitalMeterDraw Function
C
GFX_STATUS GFX_GOL_DigitalMeterDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.7.5 GFX_GOL_DigitalMeterIncrement Function
C
void GFX_GOL_DigitalMeterIncrement(
GFX_GOL_DIGITALMETER * pObject,
uint16_t delta
);
Description
This function increments the scroll bar position by the given delta value set. If the delta given exceeds the maximum value of the
meter, the value will remain to be at maximum.
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Object must be redrawn after this function is called to reflect the changes to the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
void ControlSpeed( GFX_GOL_DIGITALMETER* pObj,
int setSpeed,
int curSpeed)
{
// set page size to 1
GFX_GOL_DigitalMeterValueSet(pObj, 1);
if (setSpeed < curSpeed)
{
while(GFX_GOL_DigitalMeterValueGet(pObj) < SetSpeed)
{
// increment by 1
GFX_GOL_DigitalMeterIncrement(pObj, 1);
}
}
else if (setSpeed > curSpeed)
{
while(GFX_GOL_DigitalMeterValueGet(pObj) > SetSpeed)
{
// decrement by 1
GFX_GOL_DigitalMeterDecrement(pObj, 1);
}
}
}
5.2.2.7.7.6 GFX_GOL_DigitalMeterValueSet Function
C
void GFX_GOL_DigitalMeterValueSet(
GFX_GOL_DIGITALMETER * pObject,
int16_t value
);
Description
This function sets the value of the meter. The value used should be within the range set for the object. The new value is checked
to be in the minimum and maximum value range. If the value set is less than the minimum value, the value that will be set is the
minimum value. If the value set is more than the maximum value, then the value that will be set is the maximum value.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
value the new value of the object.
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Returns
None.
Example
GFX_GOL_DIGITALMETER *pMeter;
uint16_t ctr = 0;
// create slider here and initialize parameters
GFX_GOL_ObjectStateSet(pMeter, GFX_GOL_DIGITALMETER_DRAW_STATE);
GFX_GOL_ObjectListDraw();
while("some condition")
{
GFX_GOL_DigitalMeterValueSet(pMeter, ctr);
GFX_GOL_ObjectStateSet( pMeter,
GFX_GOL_DIGITALMETER_UPDATE_STATE);
// redraw the scroll bar
GFX_GOL_ObjectListDraw();
// update ctr here
ctr = "some source of value";
}
5.2.2.7.8 Edit Box Object Functions
5.2.2.7.8.1 GFX_GOL_EditBoxActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_EditBoxActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_EDITBOX_ACTION_ADD_CHAR Keyboard EVENT_CHARCODE New character
should be added.
GFX_GOL_EDITBOX_ACTION_DEL_CHAR Keyboard EVENT_KEYPRESS Last character
should be removed.
GFX_GOL_EDITBOX_ACTION_TOUCHSCREEN Touch
Screen
GFX_GOL_EDITBOX_FOCUSED_STATE Focus will be
drawn, caret
displayed when
enabled.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did
not affect the object.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_EDITBOX_ACTION_ADD_CHAR - New character should be added
• GFX_GOL_EDITBOX_ACTION_DEL_CHAR - Last character should be removed.
• GFX_GOL_EDITBOX_ACTION_TOUCHSCREEN - focus will be drawn when enabled. Careet will be drawn when enabled.
• GFX_GOL_OBJECT_ACTION_INVALID - Object is not affected
Example
None.
5.2.2.7.8.2 GFX_GOL_EditBoxActionSet Function
C
void GFX_GOL_EditBoxActionSet(
GFX_GOL_TRANSLATED_ACTION translatedMsg,
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function performs the state change of the object based on the translated action. This change can be overridden by the
application using the application defined GFX_GOL_MESSAGE_CALLBACK_FUNC. When the user message is determined to
affect the object, application can perform the state change in the message callback function. The following state changes are
supported:
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_EDITBOX_ACTION_ADD_CHAR Keyboard Set GFX_GOL_EDITBOX_DRAW_STATE New character is
added and Edit Box will be redrawn.
GFX_GOL_EDITBOX_ACTION_DEL_CHAR KeyBoard Set GFX_GOL_EDITBOX_DRAW_STATE Last character is
removed and Edit Box will be redrawn.
GFX_GOL_EDITBOX_ACTION_TOUCHSCREEN Touch
Screen
Set GFX_GOL_EDITBOX_FOCUSED_STATE When enabled,
focus will be redrawn, caret will also be redrawn if enabled.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
translatedMsg The action of the object based on the message.
pObject The pointer to the object whose state will be modified.
pMessage The pointer to the original message.
Returns
None.
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Example
None.
5.2.2.7.8.3 GFX_GOL_EditBoxCharAdd Function
C
GFX_STATUS GFX_GOL_EditBoxCharAdd(
GFX_GOL_EDITBOX * pObject,
GFX_XCHAR ch
);
Description
This function adds a character at the end of the text used by the object. When the object contains the maximum number of
characters any addition call to this function will not affect the text in the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
ch The character to be added.
Returns
The status of the addition.
• GFX_STATUS_SUCCESS - when the addition was successful.
• GFX_STATUS_FAILURE - when the addition was not successful.
Example
None.
5.2.2.7.8.4 GFX_GOL_EditBoxCharRemove Function
C
GFX_STATUS GFX_GOL_EditBoxCharRemove(
GFX_GOL_EDITBOX * pObject
);
Description
This function removes a character at the end of the text used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
The status of the addition.
• GFX_STATUS_SUCCESS - when the removal was successful.
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• GFX_STATUS_FAILURE - when the removal has no effect and the buffer is empty.
Example
None.
5.2.2.7.8.5 GFX_GOL_EditBoxCreate Function
C
GFX_GOL_EDITBOX * GFX_GOL_EditBoxCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
GFX_XCHAR * pText,
uint16_t charMax,
GFX_ALIGNMENT alignment,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_EDITBOX object with the parameters given. It automatically attaches the new object into a
global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The behavior of GFX_GOL_ListBoxCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• pText is an unterminated string
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
pText Pointer to the text of the object.
charMax Defines the maximum number of characters in the edit box.
alignment text alignment of the text used in the object.
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
// assume pScheme to be initialized with the style scheme
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#define MAX_CHAR_COUNT 15
GFX_GOL_OBJ_SCHEME *pScheme;
GFX_GOL_EDITBOX *pEb;
GFX_GOL_EDITBOX_STATE state;
GFX_XCHAR TextBuffer[MAX_CHAR_COUNT + 1];
// assume pScheme is initialized to a scheme in memory.
state = GFX_GOL_EDITBOX_DRAW_STATE;
pEb = GFX_GOL_EditBoxCreate(
1, 20, 64, 50, 118,
state, TextBuffer, MAX_CHAR_COUNT
GFX_ALIGN_CENTER,
pScheme);
// check if object is not created
if (pEb == NULL)
return 0;
5.2.2.7.8.6 GFX_GOL_EditBoxDraw Function
C
GFX_STATUS GFX_GOL_EditBoxDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.8.7 GFX_GOL_EditBoxTextSet Function
C
void GFX_GOL_EditBoxTextSet(
GFX_GOL_EDITBOX * pObject,
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GFX_XCHAR* pText
);
Description
This function sets the text in the object. This function copies the text located in the address pointed to by pText to the object text
buffer.
The string length must be less than or equal to the maximum characters allowed in the object. The object will truncate the string
once it reaches the maximum length.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pText pointer to the text string to be copied.
Returns
None.
Example
#define MAX_EDITBOX_CHAR_LENGTH 20
GFX_XCHAR Label0[] = “This is really a long string―;
// assume pEb is a pointer initialized to an edit box that
// as a buffer with 20 characters allowed.
GFX_GOL_EditBoxTextSet(pEb, Label0);
// at this point the edit box contains
// This is really a lon" - truncated to only 20 characters.
5.2.2.7.9 Grid Object Functions
5.2.2.7.9.1 GridClearCellState Function
C
void GridClearCellState(
GRID * pGrid,
short column,
short row,
uint16_t state
);
Description
This function clears the state of the cell (or Grid Item) specified by the column and row.
Preconditions
none
Parameters
Parameters Description
pGrid Pointer to the object.
column column index of the cell
row row index of the cell
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atate specifies the state to be cleared. See Grid Item State.
Returns
none.
Side Effects
none
5.2.2.7.9.2 GridCreate Function
C
GRID * GridCreate(
uint16_t ID,
short left,
short top,
short right,
short bottom,
uint16_t state,
short numColumns,
short numRows,
short cellWidth,
short cellHeight,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GRID object with the parameters given. It automatically attaches the new object into a global linked list of
objects and returns the address of the object.
Preconditions
none
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the Object.
top Top most position of the Object.
right Right most position of the Object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
numColumns Sets the number of columns for the grid.
numRows Sets the number of rows for the grid.
cellWidth Sets the width of each cell of the grid.
cellHeight Sets the height of each cell of the grid.
pScheme Pointer to the style scheme used for the object. Set to NULL if default style
scheme is used.
Returns
Returns the pointer to the object created.
Side Effects
none
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5.2.2.7.9.3 GridDraw Function
C
uint16_t GridDraw(
void * pObj
);
Description
This function renders the object on the screen using the current parameter settings. Location of the object is determined by the
left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined by
the style scheme set.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Preconditions
Object must be created before this function is called.
Parameters
Parameters Description
pGb Pointer to the object to be rendered.
Returns
Returns the status of the drawing
• 1 - If the rendering was completed and
• 0 - If the rendering is not yet finished.
Next call to the function will resume the rendering on the pending drawing state.
Side Effects
none
5.2.2.7.9.4 GridFreeItems Function
C
void GridFreeItems(
void * pObj
);
Description
This function removes all grid items for the given Grid and frees the memory used.
Preconditions
Object must be created before this function is called.
Parameters
Parameters Description
pGrid The pointer to the Grid object.
Returns
none.
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Side Effects
none
5.2.2.7.9.5 GridGetCell Function
C
void * GridGetCell(
GRID * pGrid,
short column,
short row,
uint16_t * cellType
);
Description
This function removes all grid items for the given Grid and frees the memory used.
Preconditions
Object must be created before this function is called.
Parameters
Parameters Description
pGrid The pointer to the Grid object.
column the column index of the cell
row the row index of the cell
cellType pointer that will receive the type of grid item or cell (GRIDITEM_IS_TEXT or
GRIDITEM_IS_BITMAP).
Returns
Returns a pointer to the grid item or cell data.
Side Effects
none
5.2.2.7.9.6 GridMsgDefault Function
C
void GridMsgDefault(
uint16_t translatedMsg,
void * pObj,
GFX_GOL_MESSAGE * pMsg
);
Description
This function performs the actual state change based on the translated message given. The following state changes are
supported:
Translated Message Input
Source
Set/Clear State Bit Description
GRID_MSG_TOUCHED Touch
Screen
none Grid will have no state change because of this event.
GRID_MSG_ITEM_SELECTED Keyboard Set
GRIDITEM_SELECTED,
Grid Item selected will be redrawn.
GRID_DRAW_ITEMS
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GRID_MSG_UP Keyboard Set GRIDITEM_DRAW, Grid Item above the currently focused item will be
redrawn.
GRID_DRAW_ITEMS
GRID_MSG_DOWN Keyboard Set GRIDITEM_DRAW, Grid Item below the currently focused item will be
redrawn.
GRID_DRAW_ITEMS
GRID_MSG_LEFT Keyboard Set GRIDITEM_DRAW, Grid Item to the left of the currently focused item will
be redrawn.
GRID_DRAW_ITEMS
GRID_MSG_RIGHT Keyboard Set GRIDITEM_DRAW, Grid Item to the right of the currently focused item
will be redrawn.
GRID_DRAW_ITEMS
Preconditions
none
Parameters
Parameters Description
translatedMsg The translated message.
pGrid The pointer to the object whose state will be modified.
pMsg The pointer to the GOL message.
Returns
none
Side Effects
none
5.2.2.7.9.7 GridSetCell Function
C
uint16_t GridSetCell(
GRID * pGrid,
short column,
short row,
uint16_t state,
void * data
);
Description
This function sets the Grid Item state and data.
Preconditions
Object must be created before this function is called.
Parameters
Parameters Description
pGrid The pointer to the Grid object.
column the column index of the cell
row the row index of the cell
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state sets the state of the Grid Item specified.
data pointer to the data used for the Grid Item.
Returns
Returns the status of the operation
• GRID_SUCCESS - if the set succeeded
• GRID_OUT_OF_BOUNDS - if the row and column given results in an out of bounds location.
Side Effects
none
5.2.2.7.9.8 GridSetCellState Function
C
void GridSetCellState(
GRID * pGrid,
short column,
short row,
uint16_t state
);
Description
This function sets the state of the Grid Item or cell.
Preconditions
Object must be created before this function is called.
Parameters
Parameters Description
pGrid The pointer to the Grid object.
column the column index of the cell
row the row index of the cell
state sets the state of the Grid Item specified.
Returns
none.
Side Effects
none
5.2.2.7.9.9 GridSetFocus Function
C
void GridSetFocus(
GRID * pGrid,
short column,
short row
);
Description
This function sets the focus of the specified Grid Item or cell.
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Preconditions
Object must be created before this function is called.
Parameters
Parameters Description
pGrid The pointer to the Grid object.
column the column index of the cell
row the row index of the cell
Returns
none.
Side Effects
none
5.2.2.7.9.10 GridTranslateMsg Function
C
uint16_t GridTranslateMsg(
void * pObj,
GFX_GOL_MESSAGE * pMsg
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
translated messages for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear State Bit Description
GRID_MSG_TOUCHED Touch
Screen
none If any touch events occurs and the x,y position falls in the
face of the grid.
GRID_MSG_ITEM_SELECTED Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed matches the object’s
ID and parameter 2 passed matches
SCAN_SPACE_PRESSED or SCAN_CR_PRESSED.
GRID_MSG_UP Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed matches the object’s
ID and parameter 2 passed matches SCAN_UP_PRESSED.
GRID_MSG_DOWN Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed matches the object’s
ID and parameter 2 passed matches
SCAN_DOWN_PRESSED.
GRID_MSG_LEFT Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed matches the object’s
ID and parameter 2 passed matches
SCAN_LEFT_PRESSED.
GRID_MSG_RIGHT Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed matches the object’s
ID and parameter 2 passed matches
SCAN_RIGHT_PRESSED.
OBJ_MSG_INVALID Any Any If the message did not affect the object.
Preconditions
none
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Parameters
Parameters Description
pGrid The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMsg Pointer to the message struct containing the message from the user interface.
Returns
Returns the translated message depending on the received GOL message:
• GRID_MSG_TOUCHED - when the grid object is touched.
• GRID_MSG_ITEM_SELECTED – when key scan SCAN_SPACE_PRESSED or SCAN_CR_PRESSED are detected.
• GRID_MSG_UP – when key scan SCAN_UP_PRESSED is detected.
• GRID_MSG_DOWN – when key scan SCAN_DOWN_PRESSED is detected.
• GRID_MSG_LEFT – when key scan SCAN_LEFT_PRESSED is detected.
• GRID_MSG_RIGHT – when key scan SCAN_RIGHT_PRESSED is detected.
• OBJ_MSG_INVALID – Button is not affected
Side Effects
none
5.2.2.7.10 Group Box Object Functions
5.2.2.7.10.1 GFX_GOL_GroupboxActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_GroupboxActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input Source Events Description
GFX_GOL_GROUPBOX_ACTION_SELECTED Touch Screen
EVENT_PRESS,
EVENT_RELEASE
If events occurs and the x,y position falls in the
area of the group box.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
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pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_GROUPBOX_ACTION_SELECTED // Groupbox area selected action ID.
Example
None.
5.2.2.7.10.2 GFX_GOL_GroupboxCreate Function
C
GFX_GOL_GROUPBOX * GFX_GOL_GroupboxCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
GFX_XCHAR * pText,
GFX_ALIGNMENT alignment,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_GROUPBOX object with the parameters given. It automatically attaches the new object into a
global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
pImage Pointer to the image used on the face of the object.
pText Pointer to the text of the object.
alignment text alignment of the text used in the object.
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
GFX_GOL_OBJ_SCHEME *pScheme;
GFX_GOL_GROUPBOX *pGroupbox;
GFX_GOL_GROUPBOX_STATE state;
// assume pScheme is initialized to a scheme in memory.
state = GFX_GOL_GROUPBOX_DRAW_STATE;
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pGroupbox = GFX_GOL_GroupboxCreate(1, // ID
0,0,GFX_Primitive_MaxXGet(),GFX_Primitive_MaxYGet(), // whole screen dimension
state, // set state to draw all
(char*)myIcon, // icon
"Place Title Here.", // text
NULL); // use default GOL scheme
if (pWindow == NULL)
return 0;
return 1;
5.2.2.7.10.3 GFX_GOL_GroupboxDraw Function
C
GFX_STATUS GFX_GOL_GroupboxDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
The text on the face of the GFX_GOL_GROUPBOX is drawn on top of the bitmap. Text alignment based on the alignment
parameter set on the object.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.10.4 GFX_GOL_GroupboxTextAlignmentGet Function
C
GFX_ALIGNMENT GFX_GOL_GroupboxTextAlignmentGet(
GFX_GOL_GROUPBOX * pObject
);
Description
This function returns the text alignment of the text string used by the object.
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Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The text alignment set in the object. See GFX_ALIGNMENT for more details.
Example
None.
5.2.2.7.10.5 GFX_GOL_GroupboxTextAlignmentSet Function
C
void GFX_GOL_GroupboxTextAlignmentSet(
GFX_GOL_GROUPBOX * pObject,
GFX_ALIGNMENT align
);
Description
This function sets the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
align The alignment set for the text in the object. See GFX_ALIGNMENT for more
details.
Returns
None.
Example
None.
5.2.2.7.10.6 GFX_GOL_GroupboxTextSet Function
C
void GFX_GOL_GroupboxTextSet(
GFX_GOL_GROUPBOX * pObject,
GFX_XCHAR * pText
);
Description
This function sets the address of the current text string used by the object.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject pointer to the object.
pText pointer to the text string to be used.
Returns
None.
Example
GFX_XCHAR Label0[] = ?Group One?;
GFX_XCHAR Label1[] = ?Group Two?;
GFX_GOL_GROUPBOX pGroupbox;
GFX_GOL_GroupboxTextSet(pGroupbox, Label0);
GFX_GOL_GroupboxTextSet(pGroupbox, Label1);
5.2.2.7.11 List Box Object Functions
5.2.2.7.11.1 GFX_GOL_ListBoxActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_ListBoxActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_LISTBOX_ACTION_TOUCHSCREEN Touch
Screen
Any Item is selected using touch screen.
GFX_GOL_LISTBOX_ACTION_MOVE Keyboard EVENT_KEYSCAN Focus is moved to the next item depending
on the key pressed (UP or DOWN key).
GFX_GOL_LISTBOX_ACTION_SELECTED Keyboard EVENT_KEYSCAN Selection status
(GFX_GOL_LISTBOX_ITEM_STATUS_SE
LECTED)
is set to the currently focused item.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
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Returns
• GFX_GOL_LISTBOX_ACTION_TOUCHSCREEN – Item is selected using touch screen
• GFX_GOL_LISTBOX_ACTION_MOVE – Focus is moved to the next item depending on the key pressed (UP or DOWN
key).
• GFX_GOL_LISTBOX_ACTION_SELECTED – Selection is set to the currently focused item
• GFX_GOL_OBJECT_ACTION_INVALID – Object is not affected
Example
None.
5.2.2.7.11.2 GFX_GOL_ListBoxActionSet Function
C
void GFX_GOL_ListBoxActionSet(
GFX_GOL_TRANSLATED_ACTION translatedMsg,
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function performs the state change of the object based on the translated action. This change can be overridden by the
application using the application defined GFX_GOL_MESSAGE_CALLBACK_FUNC. When the user message is determined to
affect the object, application can perform the state change in the message callback function. The following state changes are
supported:
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_LISTBOX_ACTION_TOUCHSCREEN Touch
Screen
Set GFX_GOL_LISTBOX_FOCUSED_STATE, If focus is
enabled, the focus state bit
GFX_GOL_LISTBOX_FOCUSED_STATE will be set.
Set GFX_GOL_LISTBOX_DRAW_FOCUS_STATE
GFX_GOL_LISTBOX_DRAW_FOCUS_STATE draw state bit
will force the List Box to be redrawn with focus.
Set GFX_GOL_LISTBOX_DRAW_ITEMS_STATE List Box will
be redrawn with selected item(s).
GFX_GOL_LISTBOX_ACTION_MOVE KeyBoard Set GFX_GOL_LISTBOX_DRAW_ITEMS_STATE List Box will
be redrawn with focus on one item.
GFX_GOL_LISTBOX_ACTION_SELECTED KeyBoard Set GFX_GOL_LISTBOX_DRAW_ITEMS_STATE List Box will
be redrawn with selection on the current item focused.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
translatedMsg The action of the object based on the message.
pObject The pointer to the object whose state will be modified.
pMessage The pointer to the original message.
Returns
None.
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Example
None.
5.2.2.7.11.3 GFX_GOL_ListBoxCreate Function
C
GFX_GOL_LISTBOX * GFX_GOL_ListBoxCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
GFX_XCHAR * pText,
GFX_ALIGNMENT alignment,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_LISTBOX object with the parameters given. It automatically attaches the new object into a
global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The behavior of GFX_GOL_ListBoxCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• pText is an unterminated string
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
pText Pointer to the text of the object. This is used for the items of the object.
alignment text alignment of the text used in the object.
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
#define LISTBOX_ID 10
const XCHAR ItemList[] = "Line1n" "Line2n";
GFX_GOL_OBJ_SCHEME *pScheme;
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GFX_GOL_LISTBOX *pLb;
GFX_XCHAR *pTemp;
uint16_t state, counter;
//assume scheme is a valid style scheme in memory
pScheme = &scheme;
state = GFX_GOL_LISTBOX_DRAW_STATE;
// create an empty listbox with default style scheme
pLb = GFX_GOL_ListBoxCreate( LISTBOX_ID, // ID number
10,10,150,200, // dimension
state, // initial state
NULL, // set items to be empty
GFX_ALIGN_CENTER,
NULL); // use default style scheme
// check if Listbox was created
if (pLb == NULL)
return 0;
// create the list of items to be placed in the listbox
// Add items (each line will become one item,
// lines must be separated by 'n' character)
pTemp = ItemList;
counter = 0;
while(*pTemp)
{
// since each item is appended NULL is assigned to
// GFX_GOL_LISTITEM pointer.
if(NULL == GFX_GOL_ListBoxItemAdd(
pLb,
NULL,
pTemp,
NULL,
0,
counter))
{
break;
}
while(*pTemp++ > (unsigned GFX_XCHAR)31);
if(*(pTemp-1) == 0)
break;
counter++;
}
5.2.2.7.11.4 GFX_GOL_ListBoxDraw Function
C
GFX_STATUS GFX_GOL_ListBoxDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
Text alignment based on the alignment parameter set on the object.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
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Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.11.5 GFX_GOL_ListBoxItemAdd Function
C
GFX_GOL_LISTITEM * GFX_GOL_ListBoxItemAdd(
GFX_GOL_LISTBOX * pObject,
GFX_GOL_LISTITEM * pPrevItem,
GFX_XCHAR * pText,
GFX_RESOURCE_HDR * pImage,
uint16_t status,
uint16_t data
);
Description
This function adds an item to the list box. This function allocates the memory needed for the GFX_GOL_LISTITEM and adds it to
the list box. The newly created GFX_GOL_LISTITEM will store the location of pText, pImage and other parameters describing
the added item.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
pPrevItem Pointer to the item after which a new item must be inserted, if this pointer is NULL,
the item will be appended at the end of the items list.
pText Pointer to the text that will be inserted. Text must persist in memory for as long as
it is referenced by an item in the list box.
pImage Pointer to the image for the item. Image must persist in memory for as long as it is
referenced by the an item in the list box.
status This parameter specifies if the item being added will be selected or redrawn
(LB_STS_SELECTED or LB_STS_REDRAW). Refer to LISTITEM structure for
details.
data User assigned data associated with the item.
Returns
The pointer to the created item.
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Example
const GFX_XCHAR ItemList[] = "Line1n" "Line2n" "Line3n";
extern GFX_RESOURCE_HDR myIcon;
GFX_GOL_LISTBOX *pLb;
GFX_GOL_LISTITEM *pItem, *pItemList;
GFX_XCHAR *pTemp;
// Assume that pLb is pointing to an existing list box in memory
// that is empty (no list).
// Create the list of the list box
// Initialize this to NULL to indicate that items will be added
// at the end of the list if the list exist on the list box or
// start a new list if the list box is empty.
pItem = NULL;
pTemp = ItemList;
pItem = GFX_GOL_ListBoxItemAdd(
pLb,
pItem,
pTemp,
NULL,
LB_STS_SELECTED,
1);
if(pItem == NULL)
return 0;
GFX_GOL_ListBoxImageSet(pItem, &myIcon);
// Adjust pTemp to point to the next line
while((uint16_t)*pTemp++ > (uint16_t)31);
// add the next item
pItem = GFX_GOL_ListBoxItemAdd(
pLb,
pItem,
pTemp,
NULL,
0,
2)
if(pItem == NULL)
return 0;
GFX_GOL_ListBoxImageSet(pItem, &myIcon);
// Adjust pTemp to point to the next line
while((uint16_t)*pTemp++ > (uint16_t)31);
// this time insert the next item after the first item on the list
pItem = LbGetItemList(pLb);
pItem = GFX_GOL_ListBoxItemAdd(
pLb,
pItem,
pTemp,
NULL,
0,
3)
if(pItem == NULL)
return 0;
GFX_GOL_ListBoxImageSet(pItem, &myIcon);
5.2.2.7.11.6 GFX_GOL_ListBoxItemFocusGet Function
C
int16_t GFX_GOL_ListBoxItemFocusGet(
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GFX_GOL_LISTBOX * pObject
);
Description
This function returns the index of the focused item in the list box. First item on the list is always indexed 0. If none of the items in
the list is focused, -1 is returned.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object.
Returns
The index of the focused item in the list box.
Example
None.
5.2.2.7.11.7 GFX_GOL_ListBoxItemFocusSet Function
C
void GFX_GOL_ListBoxItemFocusSet(
GFX_GOL_LISTBOX * pObject,
uint16_t index
);
Description
This function sets the focus of the item with the index number specified by index. First item on the list is always indexed 0.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object.
index The index number of the item to be focused.
Returns
None.
Example
None.
5.2.2.7.11.8 GFX_GOL_ListBoxItemListRemove Function
C
void GFX_GOL_ListBoxItemListRemove(
void * pObject
);
Description
This function removes the entire items list of the list box and free the memory used. The memory freed is the memory used for
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the list box. The actual text or image used for the item are not removed from memory.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
None.
5.2.2.7.11.9 GFX_GOL_ListBoxItemRemove Function
C
void GFX_GOL_ListBoxItemRemove(
GFX_GOL_LISTBOX * pObject,
GFX_GOL_LISTITEM * pItem
);
Description
This function removes an item from the list box and free the memory used. The memory freed is the memory used for the list
box. The actual text or image used for the item are not removed from memory.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pItem pointer to the list box item that will be removed.
Returns
None.
Example
None.
5.2.2.7.11.10 GFX_GOL_ListBoxSelectionChange Function
C
void GFX_GOL_ListBoxSelectionChange(
GFX_GOL_LISTBOX * pObject,
GFX_GOL_LISTITEM * pItem
);
Description
This function changes the selection status of the given item in the list box. There are two cases that this function checks Case 1:
The list box is set to multiple selection.
• The item pointed to by pItem will toggle the selection status.
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Case 2: The list box is set to single selection.
• If the currently selected item is not the item pointed to by pItem, the currently selected item will toggle to not selected. The
item pointed to by pItem will then be set to selected.
• If the currently selected item is the same item pointed to by pItem, the selection status of that item will be set to not selected.
The change in the item's selection status should be redrawn to reflect the changes.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object.
pItem The pointer to the item that will have the selection status changed.
Returns
None.
Example
None.
5.2.2.7.11.11 GFX_GOL_ListBoxSelectionGet Function
C
GFX_GOL_LISTITEM * GFX_GOL_ListBoxSelectionGet(
GFX_GOL_LISTBOX * pObject,
GFX_GOL_LISTITEM * pFromItem
);
Description
This function searches for selected items from the list box. A starting position can optionally be given. If starting position is set to
NULL, search will begin from the first item on the item list.
The function returns the pointer to the first selected item found or NULL if there are no items selected.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object.
pFromItem The starting point of the search. If this is set to NULL, the search will start at the
beginning of the item list.
Returns
The pointer to the first selected item found. NULL if there are no items selected.
Example
None.
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5.2.2.7.11.12 GFX_GOL_ListBoxVisibleItemCountGet Function
C
uint16_t GFX_GOL_ListBoxVisibleItemCountGet(
GFX_GOL_LISTBOX * pObject
);
Description
This function returns the count of items visible in the list box.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object.
Returns
The number of visible items in the list box.
Example
None.
5.2.2.7.12 Meter Object Functions
5.2.2.7.12.1 GFX_GOL_MeterActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_MeterActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear
State Bit
Description
GFX_GOL_METER_ACTION_SET System EVENT_SET If event set occurs and the meter id is sent in parameter 1.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
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Returns
• GFX_GOL_METER_ACTION_SET – Meter id is given in parameter 1 for a TYPE_SYSTEM message.
• GFX_GOL_OBJECT_ACTION_INVALID – Object is not affected
Example
None.
5.2.2.7.12.2 GFX_GOL_MeterActionSet Function
C
void GFX_GOL_MeterActionSet(
GFX_GOL_TRANSLATED_ACTION translatedMsg,
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function performs the state change of the object based on the translated action. This change can be overridden by the
application using the application defined GFX_GOL_MESSAGE_CALLBACK_FUNC. When the user message is determined to
affect the object, application can perform the state change in the message callback function. The following state changes are
supported:
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_METER_ACTION_SET System Set
GFX_GOL_METER_DRAW_STATE
Meter will be redrawn to update the
needle position and value displayed.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
translatedMsg The action of the object based on the message.
pObject The pointer to the object whose state will be modified.
pMessage The pointer to the original message.
Returns
None.
Example
None.
5.2.2.7.12.3 GFX_GOL_MeterCreate Function
C
GFX_GOL_METER * GFX_GOL_MeterCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
GFX_GOL_METER_DRAW_TYPE type,
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int16_t value,
int16_t minValue,
int16_t maxValue,
GFX_RESOURCE_HDR * pTitleFont,
GFX_RESOURCE_HDR * pValueFont,
GFX_XCHAR * pText,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_METER object with the parameters given. It automatically attaches the new object into a
global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The behavior of GFX_GOL_MeterCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
• type is not one of the defined types
• pTitleFont and pValueFont is not defined to a valid font GFX_RESOURC_HDR
• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• pText is an unterminated string
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
type Specifies the type of Meter to be drawn (see GFX_GOL_METER_TYPE).
value Initial value set to the meter.
minValue The minimum value the meter will display.
maxValue The maximum value the meter will display.
pTitleFont Pointer to the font used for the Title.
pValueFont Pointer to the font used for the value.
pText Pointer to the text label of the meter.
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
#define ID_METER 101
extern const FONT_FLASH GOLMediumFont; // medium font
extern const FONT_FLASH GOLSmallFont; // small font
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GFX_GOL_OBJ_SCHEME *pMeterScheme;
GFX_GOL_METER *pMtr;
// assume pMeterScheme is initialized to a scheme in memory.
// draw object after creation
state = GFX_GOL_METER_DRAW_STATE | GFX_GOL_METER_RING_STATE;
pMtr = GFX_GOL_MeterCreate(
ID_METER, // assign ID
30, 50, 150, 180, // set dimension
state,
GFX_GOL_METER_WHOLE_TYPE, // type of meter
0, // set initial value
0, 100, // set min and max value
&GOLMediumFont, // set title font
&GOLSmallFont, // set value font
"Speed", // Text Label
pMeterScheme); // style scheme
// check if meter was created
if (pMtr == NULL)
return 0;
// Change range colors: Normal values to WHITE
// Critical values to BLUE
// Danger values to RED
// assume that WHITE, GREEN, YELLOW and RED have been defined.
GFX_GOL_MeterScaleColorSet(pMtr, WHITE, WHITE, WHITE,
GREEN, YELLOW, RED);
// use GOLDraw() to draw the meter created
while(!GOLDraw());
5.2.2.7.12.4 GFX_GOL_MeterDecrement Function
C
void GFX_GOL_MeterDecrement(
GFX_GOL_METER * pObject,
uint16_t delta
);
Description
This function decrements the meter value by the given delta value set. If the delta given is less than the minimum value of the
meter, the value will remain to be at minimum.
Object must be redrawn after this function is called to reflect the changes to the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
See GFX_GOL_MeterIncrement().
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5.2.2.7.12.5 GFX_GOL_MeterDraw Function
C
GFX_STATUS GFX_GOL_MeterDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.12.6 GFX_GOL_MeterIncrement Function
C
void GFX_GOL_MeterIncrement(
GFX_GOL_METER * pObject,
uint16_t delta
);
Description
This function increments the scroll bar position by the given delta value set. If the delta given exceeds the maximum value of the
meter, the value will remain to be at maximum.
Object must be redrawn after this function is called to reflect the changes to the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
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Example
void ControlSpeed( GFX_GOL_METER* pObj,
int setSpeed,
int curSpeed)
{
// set page size to 1
GFX_GOL_MeterValueSet(pObj, 1);
if (setSpeed < curSpeed)
{
while(GFX_GOL_MeterValueGet(pObj) < SetSpeed)
GFX_GOL_MeterIncrement(pObj, 1); // increment by 1
}
else if (setSpeed > curSpeed)
{
while(GFX_GOL_MeterValueGet(pObj) > SetSpeed)
GFX_GOL_MeterDecrement(pObj, 1); // decrement by 1
}
}
5.2.2.7.12.7 GFX_GOL_MeterRangeSet Function
C
void GFX_GOL_MeterRangeSet(
GFX_GOL_METER * pObject,
int16_t minValue,
int16_t maxValue
);
Description
This function sets the range of the meter. When the range is modified, object must be completely redrawn to reflect the change.
minValue should always be less than maxValue.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
minValue new minimum value of the object.
maxValue new maximum value of the object.
Returns
None.
Example
None.
5.2.2.7.12.8 GFX_GOL_MeterScaleColorsSet Function
C
void GFX_GOL_MeterScaleColorsSet(
GFX_GOL_METER * pObject,
GFX_COLOR color1,
GFX_COLOR color2,
GFX_COLOR color3,
GFX_COLOR color4,
GFX_COLOR color5,
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GFX_COLOR color6
);
Description
After the object is created, this function must be called to set the arc colors of the object.
Scale colors can be used to highlight values of the meter. User can set these colors to define the arc colors and scale colors.
This also sets the color of the meter value when displayed. The color settings are set to the following angles:
Color Boundaries Type Whole Type Half Type Quarter
Arc 6 225 to 180 not used not used
Arc 5 179 to 135 179 to 135 not used
Arc 4 134 to 90 134 to 90 not used
Arc 3 89 to 45 89 to 45 89 to 45
Arc 2 44 to 0 44 to 0 44 to 0
Arc 1 -45 to -1 not used not used
As the meter is drawn colors are changed depending on the angle of the scale and label being drawn.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
color1 color assigned to Arc 1 and Scale 1.
color2 color assigned to Arc 2 and Scale 2.
color3 color assigned to Arc 3 and Scale 3.
color4 color assigned to Arc 4 and Scale 4.
color5 color assigned to Arc 5 and Scale 5.
color6 color assigned to Arc 6 and Scale 6.
Returns
None.
Example
None.
5.2.2.7.12.9 GFX_GOL_MeterValueSet Function
C
void GFX_GOL_MeterValueSet(
GFX_GOL_METER * pObject,
int16_t value
);
Description
This function sets the value of the meter. The value used should be within the range set for the object. The new value is checked
to be in the minimum and maximum value range. If the value set is less than the minimum value, the value that will be set is the
minimum value. If the value set is more than the maximum value, then the value that will be set is the maximum value.
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Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
value the new value of the object.
Returns
None.
Example
GFX_GOL_METER *pMeter;
uint16_t ctr = 0;
// create slider here and initialize parameters
GFX_GOL_ObjectStateSet(pMeter, GFX_GOL_METER_DRAW_STATE);
GFX_GOL_ObjectListDraw();
while("some condition")
{
GFX_GOL_MeterValueSet(pMeter, ctr);
GFX_GOL_ObjectStateSet( pMeter,
GFX_GOL_METER_UPDATE_DRAW_STATE);
// redraw the scroll bar
GFX_GOL_ObjectListDraw();
// update ctr here
ctr = "some source of value";
}
5.2.2.7.13 Progress Bar Object Functions
5.2.2.7.13.1 GFX_GOL_ProgressBarActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_ProgressBarActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_PROGRESSBAR_ACTION_SELECTED Touch
Screen
EVENT_PRESS, EVENT_RELEASE, If events occurs and the
x,y position falls in the area of the object.
EVENT_MOVE
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
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Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_PROGRESSBAR_ACTION_SELECTED – Object is selected
• GFX_GOL_OBJECT_ACTION_INVALID – Object is not affected
Example
None.
5.2.2.7.13.2 GFX_GOL_ProgressBarCreate Function
C
GFX_GOL_PROGRESSBAR * GFX_GOL_ProgressBarCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
uint16_t pos,
uint16_t range,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_PROGRESSBAR object with the parameters given. It automatically attaches the new object
into a global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The behavior of GFX_GOL_RadioButtonCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
• pos > range
• range = 0
• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• pText is an unterminated string
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
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top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
pos Defines the initial position of the progress.
range This specifies the maximum value of the progress bar when the progress bar is at
100% position.
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
GFX_GOL_PROGRESSBAR *pPBar;
void CreateProgressBar()
{
pPBar = PbCreate(ID_PROGRESSBAR1, // ID
50,90,270,140, // dimension
PB_DRAW, // Draw the object
25, // position
50, // set the range
NULL); // use default GOL scheme
}
5.2.2.7.13.3 GFX_GOL_ProgressBarDraw Function
C
GFX_STATUS GFX_GOL_ProgressBarDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
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5.2.2.7.13.4 GFX_GOL_ProgressBarPositionSet Function
C
void GFX_GOL_ProgressBarPositionSet(
GFX_GOL_PROGRESSBAR * pObject,
uint16_t position
);
Description
This function sets the position of the progress bar.
The value used for the position should be within the range set for the object.
Function will have an undefined behavior if the position is outside the range.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
position the new position of the scroll bar thumb.
Returns
None.
Example
GFX_GOL_PROGRESSBAR *pPb;
uint8_t direction = 1;
// this code increments and decrements the progress bar by 1
// assume progress bar was created and initialized before
while (1)
{
if(direction)
{
if(pPb ->pos == pPb ->range)
direction = 0;
else
GFX_GOL_ProgressBarPositionSet(
pPb,
GFX_GOL_ProgressBarPositionGet(pPb)+1);
}
else
{
if(pPb ->pos == 0)
direction = 1;
else
GFX_GOL_ProgressBarPositionSet(
pPb,
GFX_GOL_ProgressBarPositionGet(pPb)-1);
}
}
5.2.2.7.13.5 GFX_GOL_ProgressBarRangeSet Function
C
void GFX_GOL_ProgressBarRangeSet(
GFX_GOL_PROGRESSBAR * pObject,
uint16_t range
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);
Description
This function sets the range of the progress bar. When the range is modified, object must be completely redrawn to reflect the
change.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
range new range of the object.
Returns
None.
Example
None.
5.2.2.7.14 Picture Object Functions
5.2.2.7.14.1 GFX_GOL_PictureControlActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_PictureControlActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_PICTURECONTROL_ACTION_SELECTED Touch
Screen
EVENT_PRESS,
EVENT_RELEASE,
EVENT_MOVE
If events occurs and the x,y position
falls in the area of the picture.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
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Returns
• GFX_GOL_PICTURECONTROL_ACTION_SELECTED – Object is selected
• GFX_GOL_OBJECT_ACTION_INVALID – Object is not affected
Example
None.
5.2.2.7.14.2 GFX_GOL_PictureControlCreate Function
C
GFX_GOL_PICTURECONTROL * GFX_GOL_PictureControlCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
int8_t scaleFactor,
GFX_RESOURCE_HDR * pImage,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_PICTURECONTROL object with the parameters given. It automatically attaches the new
object into a global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The object allows creation with the image set to NULL. In this case, nothing will be drawn when the object is set to be drawn and
the frame is not enabled (See GFX_GOL_PICTURECONTROL_FRAME_STATE). If the frame is enabled, then only the frame
will be drawn.
When the assigned image's dimension is larger than the dimension of the object, partial image parameters will be set in such a
way that the upper left most corner of the image that has the same dimension as the object will be used in the object. This is the
default behavior.
The partial parameters can be modified by calling the GFX_GOL_PictureControlPartialSet() function with the desired parial
image parameters. See GFX_ImagePartialDraw() for details on the partial image rendering.
The behavior of GFX_GOL_PictureControlCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• pImage is not pointing to a GFX_RESOURCE_HDR.
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
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bottom Bottom most position of the object.
state Sets the initial state of the object.
pImage Pointer to the image by the object
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
None.
5.2.2.7.14.3 GFX_GOL_PictureControlDraw Function
C
GFX_STATUS GFX_GOL_PictureControlDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
When the image size The text on the face of the GFX_GOL_PICTURECONTROL is drawn on top of the bitmap. Text alignment
based on the alignment parameter set on the object.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.14.4 GFX_GOL_PictureControlPartialSet Function
C
void GFX_GOL_PictureControlPartialSet(
GFX_GOL_PICTURECONTROL * pObject,
uint16_t xOffset,
uint16_t yOffset,
uint16_t partialWidth,
uint16_t partialHeight
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);
Description
This function sets the partial image parameters to be used in the object. This function allows usage of the object to specify a
rectangular area of an image to be drawn as part of the object. This is useful when an image is already included in a larger
image. To save memory, a separate image is not necessary for the picture object. The location of the smaller image in the larger
image can be specified to show up in the picture object.
This function will result in an undefined behavior when one of the following is true:
• xOffset - value must not be greater than the image width.
• yOffset - value must not be greater than the image height.
• partialWidth - value must not be greater than image width - xoffset + 1. Value must also be less than the actual image width.
• partialHeight - value must not be greater than image height - yoffset + 1. Value must also be less than the actual image height.
Preconditions
Object must exist in memory. The image pointer of the object must be initialized properly.
Parameters
Parameters Description
xOffset x offset of the smaller portion of a large image
yOffset y offset of the smaller portion of a large image
partialWidth width of the selected portion of the image
partialHeight height of the selected portion of the image
Returns
None.
Example
// assume pLargeImage is a valid GFX_RESOURCE_HDR
// assume BigImage has a height and width of 100 pixels.
GFX_RESOURCE_HDR *pLargeImage = &BigImage;
GFX_GOL_PICTURECONTROL *pPicture;
uint16_t width, height;
uint16_t xOffset, yOffset;
uint16_t objectWidth, objectHeight;
objectWidth = 60 - 50; // 10 pixels
objectHeight = 120 - 90; // 30 pixels
// -1 is needed since the object dimension is inclusive
pPicture = GFX_GOL_PictureControlCreate(
10,
50, 90,
50 + objectWidth - 1,
90 + objectHeight - 1,
GFX_GOL_PICTURECONTROL_DRAW_STATE,
largeImage,
NULL);
// set the parameters of the partial image to be
// shown on the image
// get the large image dimensions
width = GFX_ImageWidthGet(pLargeImage);
height = GFX_ImageHeightGet(pLargeImage);
// get the offset so the middle of the large image with
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// the width and height matching the object will be used.
xOffset = (width - objectWidth) >> 1;
yOffset = (height - objectHeight) >> 1;
GFX_GOL_PictureControlPartialSet( pPicture,
xOffset, yOffset,
objectWidth, objectHeight);
5.2.2.7.15 Radio Button Object Functions
5.2.2.7.15.1 GFX_GOL_RadioButtonActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_RadioButtonActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_RADIOBUTTON_ACTION_CHECKED Touch
Screen
EVENT_PRESS If event occurs and the x,y position falls in
the area of the Radio Button while the
Radio Button is not checked.
Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed
matches the object�s ID and parameter
2 passed matches SCAN_CR_PRESSED
or SCAN_SPACE_PRESSED while the
Radio Button is not checked.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_RADIOBUTTON_ACTION_CHECKED - Radio Button is checked
• GFX_GOL_OBJECT_ACTION_INVALID - object is not affected
Example
None.
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5.2.2.7.15.2 GFX_GOL_RadioButtonActionSet Function
C
void GFX_GOL_RadioButtonActionSet(
GFX_GOL_TRANSLATED_ACTION translatedMsg,
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function performs the state change of the object based on the translated action. This change can be overridden by the
application using the application defined GFX_GOL_MESSAGE_CALLBACK_FUNC. When the user message is determined to
affect the object, application can perform the state change in the message callback function. The following state changes are
supported:
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_RADIOBUTTON_ACTION_CHECKED Touch
Screen,
Set GFX_GOL_RADIOBUTTON_DRAW_STATE, Depending
on the current value of RB_CHECKED Check Box will be
redrawn.
Keyboard Set/Clear GFX_GOL_RADIOBUTTON_CHECKED_STATE
Preconditions
Object must exist in memory.
Parameters
Parameters Description
translatedMsg The action of the object based on the message.
pObject The pointer to the object whose state will be modified.
pMessage The pointer to the original message.
Returns
None.
Example
None.
5.2.2.7.15.3 GFX_GOL_RadioButtonCheckGet Function
C
uint16_t GFX_GOL_RadioButtonCheckGet(
GFX_GOL_RADIOBUTTON * pObject
);
Description
This function returns the ID of the currently checked radio button in the group. When there is only one member of the group, then
that member will have the check.
When no member of the group is checked, then the id returned is (-1 or 0xFFFF).
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject pointer to the object.
Returns
The ID of the member of the group with the check.
Example
static GFX_XCHAR label0[] = "RB1";
static GFX_XCHAR label1[] = "RB2";
static GFX_XCHAR label2[] = "RB3";
uint16_t state;
GFX_GOL_OBJ_SCHEME *pScheme;
RADIOBUTTON *pRb[3];
uint16_t ID;
pScheme = GFX_GOL_ObjectSchemeCreate();
// Object will be drawn after creation
// Object will be first button in the group
state = GFX_GOL_RADIOBUTTON_DRAW_STATE |
GFX_GOL_RADIOBUTTON_CHECKED_STATE;
pRb[0] = GFX_GOL_RadioButtonCreate(ID_RADIOBUTTON1,
255,40,310,80,
state,
label0,
GFX_ALIGN_CENTER,
pScheme);
// Object will be drawn after creation
state = GFX_GOL_RADIOBUTTON_DRAW_STATE;
pRb[1] = GFX_GOL_RadioButtonCreate(ID_RADIOBUTTON2,
255,85,310,125,
state,
label1,
GFX_ALIGN_CENTER,
pScheme);
// Object will be drawn after creation
state = GFX_GOL_RADIOBUTTON_DRAW_STATE;
pRb[2] = GFX_GOL_RadioButtonCreate(ID_RADIOBUTTON3,
255,130,310,170,
state,
label2,
GFX_ALIGN_CENTER,
pScheme);
// draw the objects
while(GFX_GOL_ObjectListDraw() != GFX_STATUS_SUCCESS);
// can also use pRb[1] or pRb[0] to search the checked
// radio button of the group. ID here should be ID_RADIOBUTTON1
ID = GFX_GOL_RadioButtonCheckGet(pRb[2]);
if (ID == ID_RADIOBUTTON1)
{
// do something here then clear the check
GFX_GOL_ObjectStateClear(pRb[0], RB_CHECKED);
// Change the checked object. Pointer used is
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// any of the three. The ID used will find the
// correct object to be checked
GFX_GOL_RadioButtonCheckSet(pRb[3], ID_RADIOBUTTON2);
}
5.2.2.7.15.4 GFX_GOL_RadioButtonCheckSet Function
C
void GFX_GOL_RadioButtonCheckSet(
GFX_GOL_RADIOBUTTON * pObject,
uint16_t id
);
Description
This function sets the ID of the currently checked radio button in the group. When there is only one member of the group, then
that member will have the check.
When the id given does not exist in the group, the function will do nothing.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
id id of the member of the group.
Returns
None.
Example
See GFX_GOL_RadioButtonCheckGet() example.
5.2.2.7.15.5 GFX_GOL_RadioButtonCreate Function
C
GFX_GOL_RADIOBUTTON * GFX_GOL_RadioButtonCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
GFX_XCHAR * pText,
GFX_ALIGNMENT alignment,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_RADIOBUTTON object with the parameters given. It automatically attaches the new object
into a global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The behavior of GFX_GOL_RadioButtonCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
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• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• pText is an unterminated string
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
pText Pointer to the text of the object.
alignment text alignment of the text used in the object.
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
static GFX_XCHAR label0[] = "RB1";
static GFX_XCHAR label1[] = "RB2";
static GFX_XCHAR label2[] = "RB3";
uint16_t state;
GFX_GOL_OBJ_SCHEME *pScheme;
RADIOBUTTON *pRb[3];
pScheme = GFX_GOL_ObjectSchemeCreate();
// Object will be drawn after creation
// Object will be first button in the group
state = GFX_GOL_RADIOBUTTON_DRAW_STATE |
GFX_GOL_RADIOBUTTON_CHECKED_STATE;
pRb[0] = GFX_GOL_RadioButtonCreate(ID_RADIOBUTTON1,
255,40,310,80,
state,
label0,
GFX_ALIGN_CENTER,
pScheme);
// Object will be drawn after creation
state = GFX_GOL_RADIOBUTTON_DRAW_STATE;
pRb[1] = GFX_GOL_RadioButtonCreate(ID_RADIOBUTTON2,
255,85,310,125,
state,
label1,
GFX_ALIGN_CENTER,
pScheme);
// Object will be drawn after creation
state = GFX_GOL_RADIOBUTTON_DRAW_STATE;
pRb[2] = GFX_GOL_RadioButtonCreate(ID_RADIOBUTTON3,
255,130,310,170,
state,
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label2,
GFX_ALIGN_CENTER,
pScheme);
// draw the objects
while(GFX_GOL_ObjectListDraw() != GFX_STATUS_SUCCESS);
5.2.2.7.15.6 GFX_GOL_RadioButtonDraw Function
C
GFX_STATUS GFX_GOL_RadioButtonDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
The text on the GFX_GOL_RADIOBUTTON is drawn with the text alignment based on the alignment parameter set on the object.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.15.7 GFX_GOL_RadioButtonTextAlignmentGet Function
C
GFX_ALIGNMENT GFX_GOL_RadioButtonTextAlignmentGet(
GFX_GOL_RADIOBUTTON * pObject
);
Description
This function returns the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject pointer to the object.
Returns
The text alignment set in the object. See GFX_ALIGNMENT for more details.
Example
None.
5.2.2.7.15.8 GFX_GOL_RadioButtonTextAlignmentSet Function
C
void GFX_GOL_RadioButtonTextAlignmentSet(
GFX_GOL_RADIOBUTTON * pObject,
GFX_ALIGNMENT align
);
Description
This function sets the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
align The alignment set for the text in the object. See GFX_ALIGNMENT for more
details.
Returns
None.
Example
None.
5.2.2.7.15.9 GFX_GOL_RadioButtonTextSet Function
C
void GFX_GOL_RadioButtonTextSet(
GFX_GOL_RADIOBUTTON * pObject,
GFX_XCHAR * pText
);
Description
This function sets the address of the current text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
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pText pointer to the text string to be used.
Returns
None.
Example
GFX_XCHAR Label0[] = “ON―;
GFX_XCHAR Label1[] = “OFF―;
GFX_GOL_RADIOBUTTON GFX_GOL_RADIOBUTTON[2];
GFX_GOL_RadioButtonTextSet(GFX_GOL_RADIOBUTTON[0], Label0);
GFX_GOL_RadioButtonTextSet(GFX_GOL_RADIOBUTTON[1], Label1);
5.2.2.7.16 Round Dial Object Functions
5.2.2.7.16.1 GFX_GOL_RoundDailActionGet Function
C
uint16_t GFX_GOL_RoundDailActionGet(
void * pObj,
GFX_GOL_MESSAGE * pMsg
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
translated messages for each event of the touch screen inputs.
Translated Message Input
Source
Events Description
RD_MSG_CLOCKWISE Touch
Screen
EVENT_MOVE If events occurs and the x,y position falls in the face of the Dial and
moving in the clockwise rotation.
RD_MSG_CTR_CLOCKWISE Touch
Screen
EVENT_MOVE If events occurs and the x,y position falls in the face of the Dial and
moving in the counter clockwise rotation.
OBJ_MSG_INVALID Any Any If the message did not affect the object.
Preconditions
none
Parameters
Parameters Description
pDia The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMsg Pointer to the message struct containing the message from the user interface.
Returns
Returns the translated message depending on the received GOL message:
• RD_MSG_CLOCKWISE – Dial is moved in a clockwise direction.
• RD_MSG_CTR_CLOCKWISE – Dial is moved in a counter clockwise direction.
• GFX_GOL_MSG_INVALID – Dial is not affected
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Side Effects
none
Example
void MyGOLMsg(GFX_GOL_MESSAGE *pMsg){
GFX_OBJ_HEADER *pCurrentObj;
uint16_t objMsg;
if(pMsg->event == EVENT_INVALID)
return;
pCurrentObj = GFX_OBJ_ListGet();
while(pCurrentObj != NULL){
// Process only ROUNDDIAL
if(!GFX_OBJ_IsUpdatePending(pCurrentObj)){
switch(pCurrentObj->type){
case OBJ_ROUNDIAL:
objMsg = RdiaTranslateMsg((ROUNDDIAL*)pCurrentObj, pMsg);
if(objMsg == OBJ_MSG_INVALID)
break;
if(GFX_GOL_MESSAGECallback(objMsg,pCurrentObj,pMsg))
RdiaMsgDefault(objMsg,(ROUNDDIAL*)pCurrentObj);
break;
default: break;
}
}
}
pCurrentObj = pCurrentObj->pNxtObj;
}
5.2.2.7.16.2 GFX_GOL_RoundDailActionSet Function
C
void GFX_GOL_RoundDailActionSet(
uint16_t translatedMsg,
void * pObj,
GFX_GOL_MESSAGE * pMsg
);
Description
This function performs the actual state change based on the translated message given. The following state changes are
supported:
Translated Message Input
Source
Set/Clear State Bit Description
################ ########## ##### ##########
RD_MSG_CLOCKWISE Touch
Screen
Set GFX_GOL_ROUNDDIAL_ROT_CW, Dial will be redrawn with clockwise
update. Set GFX_GOL_ROUNDDIAL_DRAW
RD_MSG_CTR_CLOCKWISE Touch
Screen
Set GFX_GOL_ROUNDDIAL_ROT_CCW, Dial will be redrawn with counter
clockwise update. Set GFX_GOL_ROUNDDIAL_DRAW
Preconditions
none
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Parameters
Parameters Description
translatedMsg The translated message
pDia The pointer to the object whose state will be modified
pMsg The pointer to the GOL message
Returns
none
Side Effects
none
Example
See RdiaTranslateMsg() example.
5.2.2.7.16.3 GFX_GOL_RoundDialCreate Function
C
GFX_GOL_ROUNDDIAL * GFX_GOL_RoundDialCreate(
uint16_t ID,
uint16_t x,
uint16_t y,
uint16_t radius,
uint16_t state,
uint16_t res,
uint16_t value,
uint16_t max,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
It automatically attaches the new object into a global linked list of objects and returns the address of the object.
Preconditions
none
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
x Location of the center of the dial in the x coordinate.
y Location of the center of the dial in the y coordinate.
radius Defines the radius of the dial.
state Sets the initial state of the object.
res Sets the resolution of the dial when rotating clockwise or counter clockwise.
value Sets the initial value of the dial.
max Sets the maximum value of the dial.
pScheme Pointer to the style scheme used.
Returns
Returns the pointer to the object created.
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Remarks
none
Example
GFX_GOL_OBJ_SCHEME *pScheme;
GFX_GOL_ROUNDDIAL *pDial;
uint16_t state;
pScheme = GFX_GOL_SchemeCreate();
state = GFX_GOL_ROUNDDIAL_DRAW;
// creates a dial at (50,50) x,y location, with an initial value
// of 50, a resolution of 2 and maximum value of 100.
pDial = GFX_GOL_RoundDial_Create(1,50,50,25,118,0, state, 2, 50, 100, pScheme);
// check if dial was created
if (pDial == NULL)
return 0;
return 1;
5.2.2.7.16.4 GFX_GOL_RoundDialDraw Function
C
uint16_t GFX_GOL_RoundDialDraw(
void * pObj
);
Description
This function renders the object on the screen using the current parameter settings. Location of the object is determined by the
center (x,y) postion and the radius parameters. The colors used are dependent on the state of the object.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Preconditions
Object must be created before this function is called.
Parameters
Parameters Description
pDia Pointer to the object
Returns
Returns the status of the drawing
• 1 - If the rendering was completed and
• 0 - If the rendering is not yet finished.
Side Effects
none
5.2.2.7.16.5 RdiaCosine Function
C
short RdiaCosine(
short v
);
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Description
This is function RdiaCosine.
5.2.2.7.16.6 RdiaSine Function
C
short RdiaSine(
short v
);
Description
This is function RdiaSine.
5.2.2.7.17 Scrollbar Object Functions
5.2.2.7.17.1 GFX_GOL_ScrollBarActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_ScrollBarActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_SCROLLBAR_ACTION_INC Touch
Screen
EVENT_PRESS,
EVENT_MOVE
If events occurs and the x,y position falls in the area
of the slider and the slider position is to the LEFT of
the x,y position for a horizontal slider or BELOW the
x,y position for a vertical slider.
Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed matches the
object�s ID and parameter 2 passed matches
SCAN_UP_PRESSED or SCAN_LEFT_PRESSED.
GFX_GOL_SCROLLBAR_ACTION_DEC Touch
Screen
EVENT_PRESS,
EVENT_MOVE
If events occurs and the x,y position falls in the area
of the slider and the slider position is to the RIGHT
of the x,y position for a horizontal slider or ABOVE
the x,y position for a vertical slider.
Keyboard EVENT_KEYSCAN If event occurs and parameter1 passed matches the
object�s ID and parameter 2 passed matches
SCAN_DOWN_PRESSED or
SCAN_RIGHT_PRESSED.
GFX_GOL_OBJECT_ACTION_PASSIVE Touch
Screen
EVENT_RELEASE If events occurs and the x,y position falls in the area
of the slider.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_SCROLLBAR_ACTION_INC – Increment scroll bar position.
• GFX_GOL_SCROLLBAR_ACTION_DEC – Decrement scroll bar position.
• GFX_GOL_OBJECT_ACTION_PASSIVE – Object bar is not affected
• GFX_GOL_OBJECT_ACTION_INVALID – Object is not affected
Example
None.
5.2.2.7.17.2 GFX_GOL_ScrollBarActionSet Function
C
void GFX_GOL_ScrollBarActionSet(
GFX_GOL_TRANSLATED_ACTION translatedMsg,
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function performs the state change of the object based on the translated action. This change can be overridden by the
application using the application defined GFX_GOL_MESSAGE_CALLBACK_FUNC. When the user message is determined to
affect the object, application can perform the state change in the message callback function. The following state changes are
supported:
Translated Message Input Source Set/Clear State Bit Description
GFX_GOL_SCROLLBAR_ACTION_INC Touch Screen, Set
GFX_GOL_SCROLLBAR_DRAW_THUMB_STATE
Scroll Bar will
be redrawn
with thumb in
the
incremented
position.
Keyboard
GFX_GOL_SCROLLBAR_ACTION_DEC Touch Screen, Set
GFX_GOL_SCROLLBAR_DRAW_THUMB_STATE
Scroll Bar will
be redrawn
with thumb in
the
decremented
position.
Keyboard
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
translatedMsg The action of the object based on the message.
pObject The pointer to the object whose state will be modified.
pMessage The pointer to the original message.
Returns
None.
Example
None.
5.2.2.7.17.3 GFX_GOL_ScrollBarCreate Function
C
GFX_GOL_SCROLLBAR * GFX_GOL_ScrollBarCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
uint16_t range,
uint16_t page,
uint16_t pos,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_SCROLLBAR object with the parameters given. It automatically attaches the new object into
a global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The object can be configured as a scroll bar or a slider. Use the state bit GFX_GOL_SCROLLBAR_SLIDER_MODE_STATE to
enable the usage of the object as a slider. If this state bit is not enabled, the object is set up as a scroll bar.
The object can also be configured with vertical orientation. Use the state bit GFX_GOL_SCROLLBAR_VERTICAL_STATE to set
up the object with vertical orientation. If this state bit is not set, the object is used with horizontal orientation.
The behavior of GFX_GOL_ScrollBarCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• page is set to zero.
• range is set to zero.
• page > range.
Preconditions
None.
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Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
range This specifies the maximum value of the slider when the thumb is on the rightmost
position for a horizontal orientation and bottom most position for the vertical
orientation. Minimum value is always at zero.
page This is the incremental change of the slider when user action requests to move the
slider thumb. This value is added or subtracted to the current position of the thumb.
pos This defines the initial position of the thumb.
pScheme The pointer to the style scheme used for the Object. Set to NULL if default style
scheme is used.
Returns
Pointer to the newly created object.
Example
GFX_GOL_OBJ_SCHEME *pScheme;
GFX_GOL_SCROLLBAR *srollBarArray[3];
uint16_t state;
pScheme = GFX_GOL_ObjectSchemeCreate();
// create a slider with
// range = [0 - 50000]
// delta = 500
// initial position = 25000
state = GFX_GOL_SCROLLBAR_DRAW_STATE;
srollBarArray[0] = GFX_GOL_ScrollBarCreate( 5,
150, 145, 285, 181,
state,
50000, 500, 25000,
pScheme);
if (slider[0] == NULL)
return 0;
// create a slider with
// range = [0 - 100]
// delta = 20
// initial position = 0
state = GFX_GOL_SCROLLBAR_DRAW_STATE |
GFX_GOL_SCROLLBAR_SLIDER_MODE_STATE;
srollBarArray[1] = GFX_GOL_ScrollBarCreate( 6,
150, 190, 285, 220,
state,
100, 20, 0,
pScheme);
if (slider[1] == NULL)
return 0;
// create a vertical scroll bars with
// range = [0 - 30]
// delta = 2
// initial position = 20
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state = GFX_GOL_SCROLLBAR_DRAW_STATE |
GFX_GOL_SCROLLBAR_VERTICAL_STATE;
srollBarArray[2] = GFX_GOL_ScrollBarCreate( 7,
120, 145, 140, 220,
state,
30, 2, 20,
pScheme);
if (slider[2] == NULL)
return 0;
// draw the sliders
while (GFX_GOL_ObjectListDraw() == 0);
return 1;
5.2.2.7.17.4 GFX_GOL_ScrollBarDraw Function
C
GFX_STATUS GFX_GOL_ScrollBarDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
The text on the face of the GFX_GOL_SCROLLBAR is drawn on top of the bitmap. Text alignment based on the alignment
parameter set on the object.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.17.5 GFX_GOL_ScrollBarPageGet Function
C
uint16_t GFX_GOL_ScrollBarPageGet(
GFX_GOL_SCROLLBAR * pObject
);
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Description
This function returns the page size of the object. Page size defines the delta change of the thumb position when incremented via
GFX_GOL_ScrollBarPositionIncrement() or decremented via GFX_GOL_ScrollBarPositionDecrement(). Page size minimum
value is 1. Maximum value is range/2.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The page size of the object.
Example
uint16_t page;
GFX_GOL_SCROLLBAR *pScrollBar;
// assume pScrollBar is initialized to a scroll bar in memory
page = GFX_GOL_ScrollBarPageGet(pScrollBar);
5.2.2.7.17.6 GFX_GOL_ScrollBarPageSet Function
C
void GFX_GOL_ScrollBarPageSet(
GFX_GOL_SCROLLBAR * pObject,
uint16_t page
);
Description
This function sets the page size of the object. Page size defines the delta change of the thumb position when incremented via
GFX_GOL_ScrollBarPositionIncrement() or decremented via GFX_GOL_ScrollBarPositionDecrement(). Page size minimum
value is 1. Maximum value is range/2.
Modifying the page size at run time may require a redraw of the object to show the visual effect of the change.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
page value of the page size of the object.
Returns
None.
Example
See GFX_GOL_ScrollBarPositionIncrement() for code example.
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5.2.2.7.17.7 GFX_GOL_ScrollBarPositionDecrement Function
C
void GFX_GOL_ScrollBarPositionDecrement(
GFX_GOL_SCROLLBAR * pObject
);
Description
This function decrements the scroll bar position by the delta change (page) value set. Object must be redrawn after this function
is called to reflect the changes to the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
void ControlSpeed( GFX_GOL_SCROLLBAR* pObj,
int setSpeed,
int curSpeed)
{
// set page size to 1
GFX_GOL_ScrollBarPageSet(pObj, 1);
if (setSpeed < curSpeed)
{
while(GFX_GOL_ScrollBarPositionGet(pObj) < SetSpeed)
{
// increment by 1
GFX_GOL_ScrollBarPositionIncrement(pObj);
}
}
else if (setSpeed > curSpeed)
{
while(GFX_GOL_ScrollBarPositionGet(pObj) > SetSpeed)
{
// decrement by 1
GFX_GOL_ScrollBarPositionDecrement(pObj);
}
}
}
5.2.2.7.17.8 GFX_GOL_ScrollBarPositionGet Function
C
uint16_t GFX_GOL_ScrollBarPositionGet(
GFX_GOL_SCROLLBAR * pObject
);
Description
This function returns the current position of the scroll bar thumb. The thumb is the rectangular area that slides left or right (for
horizontal orientation) or slides up or down (for vertical orientation).
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Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The current position of the scroll bar thumb.
Example
#define MAXVALUE 100;
GFX_GOL_SCROLLBAR *pScrollBar;
uint32_t ctr = 0;
// create scroll bar here and initialize parameters
pScrollBar = GFX_GOL_ScrollBarCreate(....)
GFX_GOL_ObjectStateSet(pScrollBar, GFX_GOL_SCROLLBAR_DRAW_STATE);
// draw the scroll bar
GFX_GOL_ObjectListDraw();
// a routine that updates the position of the thumb through some
// conditions
while("some condition")
{
GFX_GOL_ScrollBarPositionSet(pScrollBar, ctr);
GFX_GOL_ObjectStateSet( pScrollBar,
GFX_GOL_SCROLLBAR_DRAW_THUMB_STATE);
// update the screen
GFX_GOL_ObjectListDraw();
// update ctr here
ctr = "some source of value";
}
if (GFX_GOL_ScrollBarPositionGet(pScrollBar) > MAXVALUE)
return 0;
else
"do something else"
5.2.2.7.17.9 GFX_GOL_ScrollBarPositionIncrement Function
C
void GFX_GOL_ScrollBarPositionIncrement(
GFX_GOL_SCROLLBAR * pObject
);
Description
This function increments the scroll bar position by the delta change (page) value set. Object must be redrawn after this function
is called to reflect the changes to the object.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
void ControlSpeed( GFX_GOL_SCROLLBAR* pObj,
int setSpeed,
int curSpeed)
{
// set page size to 1
GFX_GOL_ScrollBarPageSet(pObj, 1);
if (setSpeed < curSpeed)
{
while(GFX_GOL_ScrollBarPositionGet(pObj) < SetSpeed)
GFX_GOL_ScrollBarPositionIncrement(pObj); // increment by 1
}
else if (setSpeed > curSpeed)
{
while(GFX_GOL_ScrollBarPositionGet(pObj) > SetSpeed)
GFX_GOL_ScrollBarPositionDecrement(pObj); // decrement by 1
}
}
5.2.2.7.17.10 GFX_GOL_ScrollBarPositionSet Function
C
void GFX_GOL_ScrollBarPositionSet(
GFX_GOL_SCROLLBAR * pObject,
uint16_t position
);
Description
This function sets the position of the scroll bar thumb. The thumb is the rectangular area that slides left or right (for horizontal
orientation) or slides up or down (for vertical orientation).
The value used for the position should be within the range set for the object.
Function will have an undefined behavior if the position is outside the range.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
position the new position of the scroll bar thumb.
Returns
None.
Example
GFX_GOL_SCROLLBAR *pScrollBar;
uint16_t ctr = 0;
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// create slider here and initialize parameters
GFX_GOL_ObjectStateSet(pScrollBar, GFX_GOL_SCROLLBAR_DRAW_STATE);
GFX_GOL_ObjectListDraw();
while("some condition")
{
GFX_GOL_ScrollBarPositionSet(pScrollBar, ctr);
GFX_GOL_ObjectStateSet( pScrollBar,
GFX_GOL_SCROLLBAR_DRAW_THUMB_STATE);
// redraw the scroll bar
GFX_GOL_ObjectListDraw();
// update ctr here
ctr = "some source of value";
}
5.2.2.7.17.11 GFX_GOL_ScrollBarRangeGet Function
C
uint16_t GFX_GOL_ScrollBarRangeGet(
GFX_GOL_SCROLLBAR * pObject
);
Description
This function returns the range of the thumb of the scroll bar.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The range of the scroll bar.
Example
GFX_GOL_SCROLLBAR *pSld;
uint16_t range;
range = GFX_GOL_ScrollBarRangeGet(pSld);
5.2.2.7.17.12 GFX_GOL_ScrollBarRangeSet Function
C
void GFX_GOL_ScrollBarRangeSet(
GFX_GOL_SCROLLBAR * pObject,
uint16_t range
);
Description
This function sets the range of the thumb of the scroll bar. When the range is modified, object must be completely redrawn to
reflect the change.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject pointer to the object.
range new range of the scroll bar.
Returns
None.
Example
GFX_GOL_SCROLLBAR *pSld;
GFX_GOL_ScrollBarRangeSet(pSld, 100);
// to completely redraw the object when
// GFX_GOL_ObjectListDraw() is executed.
GFX_GOL_ObjectStateSet(pSld, SLD_DRAW);
5.2.2.7.18 Static Text Object Functions
5.2.2.7.18.1 GFX_GOL_StaticTextActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_StaticTextActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen inputs.
Translated Message Input
Source
Events Description
GFX_GOL_STATICTEXT_ACTION_SELECTED Touch
Screen
EVENT_PRESS,
EVENT_RELEASE
If events occurs and the x,y position falls in
the area of the static text.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_STATICTEXT_ACTION_SELECTED – Object is selected
• GFX_GOL_OBJECT_ACTION_INVALID – Object is not affected
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Example
None.
5.2.2.7.18.2 GFX_GOL_StaticTextAlignmentGet Function
C
GFX_ALIGNMENT GFX_GOL_StaticTextAlignmentGet(
GFX_GOL_STATICTEXT * pObject
);
Description
This function returns the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The text alignment set in the object. See GFX_ALIGNMENT for more details.
Example
None.
5.2.2.7.18.3 GFX_GOL_StaticTextAlignmentSet Function
C
void GFX_GOL_StaticTextAlignmentSet(
GFX_GOL_STATICTEXT * pObject,
GFX_ALIGNMENT align
);
Description
This function sets the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
align The alignment set for the text in the object. See GFX_ALIGNMENT for more
details.
Returns
None.
Example
None.
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5.2.2.7.18.4 GFX_GOL_StaticTextCreate Function
C
GFX_GOL_STATICTEXT * GFX_GOL_StaticTextCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
GFX_XCHAR * pText,
GFX_ALIGNMENT alignment,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_STATICTEXT object with the parameters given. It automatically attaches the new object into
a global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The text can be configured to have text aligned. See GFX_ALIGNMENT for details. Text can also have multiple lines by inserting
the new line character to the text string supplied to the object. Any string that exceeds the dimension of the object will be clipped.
When the object is used with no background, application must manage the object when text is modified and redrawn. i.e. the
previous text must be removed. Use GFX_GOL_STATICTEXT_NOBACKGROUND_STATE state bit to disable the background.
The behavior of GFX_GOL_StaticTextCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• pText is an unterminated string
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
pText Pointer to the text of the object.
alignment text alignment of the text used in the object.
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
// assume pScheme is initialized
GFX_GOL_OBJ_SCHEME *pScheme;
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GFX_GOL_STATICTEXT *pSt;
pScheme = GOLCreateScheme();
StCreate(
ID_STATICTEXT1, // ID
30,80,235,160, // dimension
GFX_GOL_STATICTEXT_DRAW_STATE, // draw the object
"Static Textn Example", // 2 lines of text
GFX_ALIGN_CENTER, // align text on the center
pScheme); // use given scheme
5.2.2.7.18.5 GFX_GOL_StaticTextDraw Function
C
GFX_STATUS GFX_GOL_StaticTextDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
Text alignment based on the alignment parameter set on the object.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.18.6 GFX_GOL_StaticTextGet Function
C
GFX_XCHAR * GFX_GOL_StaticTextGet(
GFX_GOL_STATICTEXT * pObject
);
Description
This function returns the address of the current text string used by the object.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to text string.
Example
GFX_XCHAR *pChar;
GFX_GOL_STATICTEXT OBJECT_ARRAY[2];
pChar = GFX_GOL_StaticTextGet(OBJECT_ARRAY[0]);
5.2.2.7.18.7 GFX_GOL_StaticTextSet Function
C
void GFX_GOL_StaticTextSet(
GFX_GOL_STATICTEXT * pObject,
GFX_XCHAR * pText
);
Description
This function sets the address of the current text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pText pointer to the text string to be used.
Returns
None.
Example
None.
5.2.2.7.19 Text Entry Object Functions
5.2.2.7.19.1 GFX_GOL_TextEntryActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_TextEntryActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
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Translated Message Input
Source
Set/Clear State Bit Description
GFX_GOL_TEXTENTRY_ACTION_PRESS Touch
Screen
EVENT_PRESS,
EVENT_MOVE
If the event occurs and the x,y position falls in
the face of one of the keys of the object while
the key is unpressed.
GFX_GOL_TEXTENTRY_ACTION_RELEASED Touch
Screen
EVENT_MOVE If the event occurs and the x,y position falls
outside the face of one of the keys of the
object while the key is pressed.
GFX_GOL_TEXTENTRY_ACTION_RELEASED Touch
Screen
EVENT_RELEASE If the event occurs and the x,y position falls
does not falls inside any of the faces of the
keys of the object.
GFX_GOL_TEXTENTRY_ACTION_ADD_CHAR Touch
Screen
EVENT_RELEASE,
EVENT_MOVE
If the event occurs and the x,y position falls in
the face of one of the keys of the object while
the key is unpressed and the key is
associated with no commands.
GFX_GOL_TEXTENTRY_ACTION_DELETE Touch
Screen
EVENT_RELEASE,
EVENT_MOVE
If the event occurs and the x,y position falls in
the face of one of the keys of the object while
the key is unpressed and the key is
associated with delete command.
GFX_GOL_TEXTENTRY_ACTION_SPACE Touch
Screen
EVENT_RELEASE,
EVENT_MOVE
If the event occurs and the x,y position falls in
the face of one of the keys of the object while
the key is unpressed and the key is
associated with space command.
GFX_GOL_TEXTENTRY_ACTION_ENTER Touch
Screen
EVENT_RELEASE,
EVENT_MOVE
If the event occurs and the x,y position falls in
the face of one of the keys of the object while
the key is unpressed and the key is
associated with enter command.
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_TEXTENTRY_ACTION_PRESS - A key is pressed
• GFX_GOL_TEXTENTRY_ACTION_RELEASED - A key was released (generic for keys with no commands or characters
assigned)
• GFX_GOL_TEXTENTRY_ACTION_ADD_CHAR - A key was released with character assigned
• GFX_GOL_TEXTENTRY_ACTION_DELETE - A key was released with delete command assigned
• GFX_GOL_TEXTENTRY_ACTION_SPACE - A key was released with space command assigned
• GFX_GOL_TEXTENTRY_ACTION_ENTER - A key was released with enter command assigned
• GFX_GOL_OBJECT_ACTION_INVALID - Text Entry is not affected
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Example
None.
5.2.2.7.19.2 GFX_GOL_TextEntryActionSet Function
C
void GFX_GOL_TextEntryActionSet(
uint16_t translatedMsg,
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function performs the state change of the object based on the translated action. This change can be overridden by the
application using the application defined GFX_GOL_MESSAGE_CALLBACK_FUNC. When the user message is determined to
affect the object, application can perform the state change in the message callback function. The following state changes are
supported:
Translated Message Input Source Set/Clear State Bit Description
GFX_GOL_TEXTENTRY_ACTION_ADD_CHAR
Touch Screen,
Set
GFX_GOL_TEXTENTRY_UPDATE_TEXT_STATE,
Add a character in
the buffer and update
the text displayed.
GFX_GOL_TEXTENTRY_UPDATE_KEY_STATE, Clear
GFX_GOL_TEXTENTRY_KEY_PRESSED_STATE
GFX_GOL_TEXTENTRY_ACTION_SPACE
Touch Screen,
Set
GFX_GOL_TEXTENTRY_UPDATE_TEXT_STATE,
Insert a space
character in the
buffer and update the
text displayed.
GFX_GOL_TEXTENTRY_UPDATE_KEY_STATE, Clear
GFX_GOL_TEXTENTRY_KEY_PRESSED_STATE
GFX_GOL_TEXTENTRY_ACTION_DELETE
Touch Screen,
Set
GFX_GOL_TEXTENTRY_UPDATE_TEXT_STATE,
Delete the most
recent character in
the buffer and update
the text displayed.
GFX_GOL_TEXTENTRY_UPDATE_KEY_STATE, Clear
GFX_GOL_TEXTENTRY_KEY_PRESSED_STATE
GFX_GOL_TEXTENTRY_ACTION_ENTER
Touch Screen,
Set
GFX_GOL_TEXTENTRY_UPDATE_TEXT_STATE,
User can define the
use of this event in
the message
callback. Object will
just update the key.
GFX_GOL_TEXTENTRY_UPDATE_KEY_STATE, Clear
GFX_GOL_TEXTENTRY_KEY_PRESSED_STATE
GFX_GOL_TEXTENTRY_ACTION_RELEASED
Touch Screen,
Clear
GFX_GOL_TEXTENTRY_KEY_PRESSED_STATE
A Key in the object
will be redrawn in the
unpressed state.
Set
GFX_GOL_TEXTENTRY_UPDATE_KEY_STATE
GFX_GOL_TEXTENTRY_ACTION_PRESSED
Touch Screen,
Set
GFX_GOL_TEXTENTRY_KEY_PRESSED_STATE
A Key in the object
will be redrawn in the
pressed state.
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GFX_GOL_TEXTENTRY_UPDATE_KEY_STATE
Preconditions
Object must exist in memory.
Parameters
Parameters Description
translatedMsg The action of the object based on the message.
pObject The pointer to the object whose state will be modified.
pMessage The pointer to the original message.
Returns
None.
Example
None.
5.2.2.7.19.3 GFX_GOL_TextEntryBufferClear Function
C
void GFX_GOL_TextEntryBufferClear(
GFX_GOL_TEXTENTRY * pObject
);
Description
This function will clear the data in the display. Object must be redrawn to reflect the change in the buffer. Use the drawing state
bit GFX_GOL_TEXTENTRY_UPDATE_TEXT_STATE to update the text on the screen.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
None.
5.2.2.7.19.4 GFX_GOL_TextEntryBufferGet Function
C
GFX_XCHAR * GFX_GOL_TextEntryBufferGet(
GFX_GOL_TEXTENTRY * pObject
);
Description
This function returns the buffer used to display text.
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Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The pointer to the text buffer used to display text.
Example
None.
5.2.2.7.19.5 GFX_GOL_TextEntryBufferSet Function
C
void GFX_GOL_TextEntryBufferSet(
GFX_GOL_TEXTENTRY * pObject,
GFX_XCHAR * pText,
uint16_t MaxSize
);
Description
This function sets the buffer used to display text. If the buffer is initialized with a string, the string must be a null terminated string.
If the string length is greater than MaxSize, string will be truncated to MaxSize. pText must point to a valid memory location with
size equal to MaxSize. The total number of characters that will be displayed on the object will be MaxSize - 1 since the last
character will be the string terminator character.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pText pointer to the new text buffer to be displayed.
maxSize maximum length of the new buffer to be used.
Returns
None.
Example
None.
5.2.2.7.19.6 GFX_GOL_TextEntryCharAdd Function
C
void GFX_GOL_TextEntryCharAdd(
GFX_GOL_TEXTENTRY * pObject
);
Description
This function will insert a character to the end of the buffer. Drawing states GFX_GOL_TEXTENTRY_UPDATE_TEXT_STATE
or GFX_GOL_TEXTENTRY_DRAW_STATE must be set to see the effect of the addition.
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Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
None.
5.2.2.7.19.7 GFX_GOL_TextEntryCreate Function
C
GFX_GOL_TEXTENTRY * GFX_GOL_TextEntryCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
uint16_t horizontalKeys,
uint16_t verticalKeys,
GFX_XCHAR * pText[],
GFX_XCHAR * pBuffer,
GFX_ALIGNMENT alignment,
uint16_t bufferLength,
GFX_RESOURCE_HDR * pDisplayFont,
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This function creates a GFX_GOL_TEXTENTRY object with the parameters given. It automatically attaches the new object into a
global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
The behavior of GFX_GOL_TextEntryCreate() will be undefined if one of the following is true:
• left >= right
• top >= bottom
• pScheme is not pointing to a GFX_GOL_OBJ_SCHEME
• horizontal key or vertical key count is 0
• pText is an unterminated string
• pBuffer is initialized to an allocated memory.
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
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left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
radius Radius of the rounded edge. When using gradient buttons and radius != 0,
emboss size <= radius. If this is not met, the the GFX_GOL_BUTTON face will not
have gradient effect.
state Sets the initial state of the object.
horizontalKeys Number of horizontal keys
verticalKeys Number of vertical keys
pText array of pointer to the custom "text" assigned by the user.
pBuffer pointer to the buffer that holds the text to be displayed.
alignment text alignment of the text used in the object.
bufferLength length of the buffer assigned by the user. The choice of the length should include
the string null terminator.
For example if the bufferLength is set to 3, only two characters can be shown on the object
since the last character will be the string terminator character.
pDisplayFont pointer to the font image to be used on the edit box section of the object.
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
TODO:Add example code.
5.2.2.7.19.8 GFX_GOL_TextEntryDraw Function
C
GFX_STATUS GFX_GOL_TextEntryDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
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yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.19.9 GFX_GOL_TextEntryKeyCommandGet Function
C
GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE GFX_GOL_TextEntryKeyCommandGet(
GFX_GOL_TEXTENTRY * pObject,
uint16_t index
);
Description
This function will return the currently assigned command to the key with the given index. (See
GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE)
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
index index or position of the key.
Returns
Command assigned to the key (See GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE).
Example
None.
5.2.2.7.19.10 GFX_GOL_TextEntryKeyCommandSet Function
C
bool GFX_GOL_TextEntryKeyCommandSet(
GFX_GOL_TEXTENTRY * pObject,
uint16_t index,
GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE command
);
Description
This function will assign a command to a key with the given index. (See GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE)
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
index index or position of the key.
command command assigned for the key.
Returns
TRUE - if the assignment was a success. FALSE - if the assignment was not successful.
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Example
None.
5.2.2.7.19.11 GFX_GOL_TextEntryKeyIsPressed Function
C
bool GFX_GOL_TextEntryKeyIsPressed(
GFX_GOL_TEXTENTRY * pObject,
uint16_t index
);
Description
This function will test if a key given by its index in the object is pressed.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
index index or position of key that is being tested.
Returns
TRUE - if the key is pressed. FALSE - if the key is not pressed.
Example
None.
5.2.2.7.19.12 GFX_GOL_TextEntryKeyListCreate Function
C
KEYMEMBER * GFX_GOL_TextEntryKeyListCreate(
GFX_GOL_TEXTENTRY * pObject,
GFX_XCHAR * pText[]
);
Description
This function will create the list of KEYMEMBERS that holds the information on each key. The number of keys is determined by
the equation (keycount = verticalKeys*horizontalKeys). The object creates the information holder for each key automatically and
assigns each entry in the *pText[] array with the first entry automatically assigned to the key with an index of 1.
The number of entries to *pText[] must be at least equal to keycount. The last key is assigned with an index of keycount-1.
No checking is performed on the length of *pText[] entries to match (verticalKeys*horizontalKeys).
The function behavior is undefined if the pText[] array is less than the keycount value.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pText pointer to the text defined by the application.
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Returns
Returns the pointer to the newly created KEYMEMBER list. A NULL is returned if the list is not created succesfully.
Example
None.
5.2.2.7.19.13 GFX_GOL_TextEntryKeyMemberListDelete Function
C
void GFX_GOL_TextEntryKeyMemberListDelete(
void * pObject
);
Description
This function will delete the KEYMEMBER list assigned to the object from memory. Pointer to the KEYMEMBER list is then
initialized to NULL. All memory resources allocated to the key member list is freed.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
None.
5.2.2.7.19.14 GFX_GOL_TextEntryKeyTextSet Function
C
bool GFX_GOL_TextEntryKeyTextSet(
GFX_GOL_TEXTENTRY * pObject,
uint16_t index,
GFX_XCHAR * pText
);
Description
This function will set the text assigned to a key with the given index.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
index index or position of the key.
pText pointer to the text that will be assigned to the key.
Returns
TRUE - if the assignment was a success. FALSE - if the assignment was not successful.
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Example
None.
5.2.2.7.19.15 GFX_GOL_TextEntryLastCharDelete Function
C
void GFX_GOL_TextEntryLastCharDelete(
GFX_GOL_TEXTENTRY * pObject
);
Description
This function will remove the last character of the buffer and replace it with a string terminator. Drawing states
GFX_GOL_TEXTENTRY_UPDATE_TEXT_STATE or GFX_GOL_TEXTENTRY_DRAW_STATE must be set to see the effect of
the addition.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
None.
5.2.2.7.19.16 GFX_GOL_TextEntrySpaceCharAdd Function
C
void GFX_GOL_TextEntrySpaceCharAdd(
GFX_GOL_TEXTENTRY * pObject
);
Description
This function will insert a space character to the end of the buffer. Drawing states
GFX_GOL_TEXTENTRY_UPDATE_TEXT_STATE or GFX_GOL_TEXTENTRY_DRAW_STATE must be set to see the effect of
the addition.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
None.
Example
None.
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5.2.2.7.20 Window Object Functions
5.2.2.7.20.1 GFX_GOL_WindowActionGet Function
C
GFX_GOL_TRANSLATED_ACTION GFX_GOL_WindowActionGet(
void * pObject,
GFX_GOL_MESSAGE * pMessage
);
Description
This function evaluates the message from a user if the message will affect the object or not. The table below enumerates the
action for each event of the touch screen and keyboard inputs.
Translated Message Input Source Events Description
GFX_GOL_WINDOW_ACTION_TITLE Touch Screen EVENT_PRESS, EVENT_RELEASE, EVENT_MOVE If events occurs
and the x,y position falls in the TITLE area of the window
GFX_GOL_WINDOW_ACTION_CLIENT Touch Screen EVENT_PRESS, EVENT_RELEASE, EVENT_MOVE If events occurs
and the x,y position falls in the CLIENT area of the window
GFX_GOL_OBJECT_ACTION_INVALID Any Any If the message did not affect the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object where the message will be evaluated to check if the
message will affect the object.
pMessage Pointer to the the message from the user interface.
Returns
• GFX_GOL_WINDOW_ACTION_CLIENT // Window client area selected action ID.
• GFX_GOL_WINDOW_ACTION_TITLE // Window title bar selected action ID.
Example
None.
5.2.2.7.20.2 GFX_GOL_WindowCreate Function
C
GFX_GOL_WINDOW * GFX_GOL_WindowCreate(
uint16_t ID,
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t state,
void * pBitmap,
GFX_XCHAR * pText,
GFX_ALIGNMENT alignment,
GFX_GOL_OBJ_SCHEME * pScheme
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);
Description
This function creates a GFX_GOL_WINDOW object with the parameters given. It automatically attaches the new object into a
global linked list of objects and returns the address of the object.
This function returns the pointer to the newly created object. If the object is not successfully created, it returns NULL.
Preconditions
None.
Parameters
Parameters Description
ID Unique user defined ID for the object instance.
left Left most position of the object.
top Top most position of the object.
right Right most position of the object.
bottom Bottom most position of the object.
state Sets the initial state of the object.
pImage Pointer to the image used on the face of the object.
pText Pointer to the text of the object.
alignment text alignment of the text used in the object.
pScheme Pointer to the style scheme used.
Returns
Pointer to the newly created object.
Example
GFX_GOL_OBJ_SCHEME *pScheme;
GFX_GOL_WINDOW *pWindow;
GFX_GOL_WINDOW_STATE state;
// assume pScheme is initialized to a scheme in memory.
state = GFX_GOL_WINDOW_DRAW_STATE;
pWindow = GFX_GOL_WindowCreate(1, // ID
0,0,GFX_Primitive_MaxXGet(),GFX_Primitive_MaxYGet(), // whole screen dimension
state, // set state to draw all
(char*)myIcon, // icon
"Place Title Here.", // text
NULL); // use default GOL scheme
if (pWindow == NULL)
return 0;
return 1;
5.2.2.7.20.3 GFX_GOL_WindowDraw Function
C
GFX_STATUS GFX_GOL_WindowDraw(
void * pObject
);
Description
This function renders the object on the screen based on the current state of the object. Location of the object is determined by
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the left, top, right and bottom parameters. The colors used are dependent on the state of the object. The font used is determined
by the style scheme set.
The text on the face of the GFX_GOL_WINDOW is drawn on top of the bitmap. Text alignment based on the alignment
parameter set on the object.
When rendering objects of the same type, each object must be rendered completely before the rendering of the next object is
started. This is to avoid incomplete object rendering.
Normally, application will just call GFX_GOL_ObjectListDraw() to allow the Graphics Library to manage all object rendering. See
GFX_GOL_ObjectListDraw() for more information on object rendering.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
GFX_STATUS_SUCCESS - When the object rendering is finished. GFX_STATUS_FAILURE - When the object rendering is not
yet finished. Application needs to call this rendering function again to continue the rendering.
Example
None.
5.2.2.7.20.4 GFX_GOL_WindowTextAlignmentGet Function
C
GFX_ALIGNMENT GFX_GOL_WindowTextAlignmentGet(
GFX_GOL_WINDOW * pObject
);
Description
This function returns the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The text alignment set in the object. See GFX_ALIGNMENT for more details.
Example
None.
5.2.2.7.20.5 GFX_GOL_WindowTextAlignmentSet Function
C
void GFX_GOL_WindowTextAlignmentSet(
GFX_GOL_WINDOW * pObject,
GFX_ALIGNMENT align
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);
Description
This function sets the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
align The alignment set for the text in the object. See GFX_ALIGNMENT for more
details.
Returns
None.
Example
None.
5.2.2.7.20.6 GFX_GOL_WindowTextSet Function
C
void GFX_GOL_WindowTextSet(
GFX_GOL_WINDOW * pObject,
GFX_XCHAR * pText
);
Description
This function sets the address of the current text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pText pointer to the text string to be used.
Returns
None.
Example
GFX_XCHAR Label0[] = ?ON?;
GFX_XCHAR Label1[] = ?OFF?;
GFX_GOL_WINDOW pWindow;
GFX_GOL_WindowTextSet(pWindow, Label0);
GFX_GOL_WindowTextSet(pWindow, Label1);
5.2.2.7.21 Draw Functions
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5.2.2.7.21.1 ClearPaletteChangeError Function
C
void ClearPaletteChangeError();
Description
Clears the Palette change error status
Preconditions
none
Returns
none
Side Effects
none
5.2.2.7.21.2 DisablePalette Function
C
void DisablePalette();
Description
Disables the Palette mode.
Preconditions
none
Returns
none
5.2.2.7.21.3 DrawArc Function
C
uint16_t DrawArc(
int16_t cx,
int16_t cy,
int16_t r1,
int16_t r2,
int16_t startAngle,
int16_t endAngle
);
Description
This renders an arc with from startAngle to endAngle with the thickness of r2-r1. The function returns 1 when the arc is rendered
successfuly and returns a 0 when it is not yet finished. The next call to the function will continue the rendering.
Preconditions
none
Parameters
Parameters Description
cx the location of the center of the arc in the x direction.
cy the location of the center of the arc in the y direction.
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r1 the smaller radius of the arc.
r2 the larger radius of the arc.
startAngle start angle of the arc.
endAngle end angle of the arc.
Returns
Returns 1 if the rendering is done, 0 if not yet done.
Side Effects
none
Remarks
none
5.2.2.7.21.4 EnablePalette Function
C
void EnablePalette();
Description
Enables the Palette mode.
Preconditions
none
Returns
none
5.2.2.7.21.5 GetPaletteChangeError Function
C
BYTE GetPaletteChangeError();
Description
Returns the Palette change error status
Preconditions
none
Returns
Returns the palette change status. 1 - If the palette change error occured 0 - If no palette change error occured
Side Effects
none
5.2.2.7.21.6 GFX_AlphaBlendingValueGet Function
C
uint16_t GFX_AlphaBlendingValueGet();
Description
This function returns the current alpha value set for alpha blending rendering. See GFX_AlphaBlendingValueSet() for details of
alpha blending values.
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Preconditions
None.
Returns
The alpha blending value.
Example
TODO:Add example code
5.2.2.7.21.7 GFX_AlphaBlendingValueSet Function
C
GFX_STATUS GFX_AlphaBlendingValueSet(
uint16_t alpha
);
Description
This function sets the alpha value for alpha blending rendering. Accepted values are dependent on the used alpha blending
routines at build time. When using the software routines in the Primitive Layer, accepted values are 0, 25, 50, 75 and 100.
If using a specific implementation in the display driver used, implementation may support the full range (0-100). When this is the
case, refer to the driver alpha blending solution for details.
Function operation will ignore unsupported values of alpha.
Preconditions
None.
Parameters
Parameters Description
alpha Defines the alpha blending percentage to be used for alpha blending routines.
Accepted values are dependent on the alpha blending routines used. For Primitive
Layer
5.2.2.7.21.8 GFX_AlphaBlendWindow Function
C
GFX_STATUS GFX_AlphaBlendWindow(
GFX_ALPHA_PARAMS * alphaParams,
uint16_t width,
uint16_t height,
uint8_t alphaPercent
);
Description
None
Preconditions
None
Parameters
Parameters Description
None None
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Returns
None
Example
None
5.2.2.7.21.9 GFX_BackgroundColorGet Function
C
GFX_COLOR GFX_BackgroundColorGet();
Description
This function returns the color used in the current background.
Preconditions
None.
Returns
The color used in the current background.
Example
None.
5.2.2.7.21.10 GFX_BackgroundImageGet Function
C
GFX_RESOURCE_HDR * GFX_BackgroundImageGet();
Description
This function returns the pointer to the image used in the current background.
Preconditions
None.
Returns
The pointer to the image used in the current background.
Example
None.
5.2.2.7.21.11 GFX_BackgroundImageLeftGet Function
C
uint16_t GFX_BackgroundImageLeftGet();
Description
This function returns the horizontal starting position of the current background. This position defines the x position of the upper
left corner of the background.
Preconditions
None.
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Returns
The horizontal starting position of the current background.
Example
None.
5.2.2.7.21.12 GFX_BackgroundImageTopGet Function
C
uint16_t GFX_BackgroundImageTopGet();
Description
This function returns the vertical starting position of the current background. This position defines the y position of the upper left
corner of the background.
Preconditions
None.
Returns
The vertical starting position of the current background.
Example
None.
5.2.2.7.21.13 GFX_BackgroundSet Function
C
void GFX_BackgroundSet(
uint16_t left,
uint16_t top,
GFX_RESOURCE_HDR * pImage,
GFX_COLOR color
);
Description
This function sets the background information. Note that the width and height of the background is only needed when the
background is an image. When the background is a color (image pointer is NULL), the width and height is not needed here since
the purpose of the background information is to record only the color used.
Preconditions
None.
Parameters
Parameters Description
left Horizontal starting position of the background.
top Vertical starting position of the background.
pImage Pointer to the background image used. Set this to NULL if not used.
color If the background image is NULL, background is assumed to be this color.
Returns
None.
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Example
None.
5.2.2.7.21.14 GFX_BackgroundTypeGet Function
C
GFX_BACKGROUND_TYPE GFX_BackgroundTypeGet();
Description
This function returns the type of the current background.
Preconditions
None.
Returns
The type of the current background set.
Example
None.
5.2.2.7.21.15 GFX_BackgroundTypeSet Function
C
void GFX_BackgroundTypeSet(
GFX_BACKGROUND_TYPE type
);
Description
This function sets the background type.
Preconditions
None.
Parameters
Parameters Description
type Type of background that will be used.
Returns
None.
Example
None.
5.2.2.7.21.16 GFX_BarAlphaDraw Function
C
uint16_t GFX_BarAlphaDraw(
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom
);
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Description
This function renders an alpha blended bar shape with the currently set color and the currently set background type (see
GFX_BACKGROUND_TYPE).
The parameters left, top, right bottom will define the shape dimension.
The rendering of this shape becomes undefined when any one of the following is true:
• Any of the following pixel locations left,top or right,bottom falls outside the frame buffer.
• Colors are not set before this function is called.
• When right < left
• When bottom < top
• When pixel locations defined by left, top and/or right, bottom are not on the frame buffer.
Preconditions
Color must be set by GFX_ColorSet(). Alpha blending value must be set by GFX_AlphaBlendingValueSet().
Parameters
Parameters Description
left defines the left most pixel of the shape.
top defines the top most pixel of the shape.
right defines the right most pixel of the shape.
bottom defines the bottom most pixel of the shape.
Returns
TBA (see GFX_STATUS).
Example
// assume RED is a macro that define GFX_COLOR types
GFX_STATUS status;
// assume BackGroundImage is a valid image already draw
// on the screen
GFX_RESOURCE_HDR *pMyBackgroundImage = &BackGroundImage;
// render an alpha blended bar with
// the current contents of the frame buffer
GFX_AlphaBlendingValueSet(50);
GFX_BackgroundTypeSet(GFX_BACKGROUND_DISPLAY_BUFFER);
GFX_ColorSet(RED);
status = GFX_BarAlphaDraw(10, 110, 100, 200);
// render an alpha blended bar with a background image
GFX_AlphaBlendingValueSet(75);
GFX_FillStyleSet(GFX_FILL_STYLE_ALPHA_COLOR);
// color value here has no effect since the background set
// is type GFX_BACKGROUND_IMAGE
GFX_BackgroundSet(0, 0, pMyBackGroundImage, 0);
GFX_BackgroundTypeSet(GFX_BACKGROUND_IMAGE);
GFX_ColorSet(RED);
status = GFX_BarAlphaDraw(10, 110, 100, 200);
5.2.2.7.21.17 GFX_BarDraw Function
C
GFX_STATUS GFX_BarDraw(
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uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom
);
Description
This function renders a bar shape with:
• solid color - when the fill style is set to GFX_FILL_STYLE_COLOR
• alpha blended fill - when the fill style is set to GFX_FILL_STYLE_ALPHA_COLOR.
Any other selected fill style will be ignored and will assume a solid color fill will be used. The parameters left, top, right bottom will
define the shape dimension.
When fill style is set to GFX_FILL_STYLE_ALPHA_COLOR, the bar can also be rendered with an option to select the type of
background.
Preconditions
Fill style must be set by GFX_FillStyleSet() when alpha blended fill is desired. Color must be set by GFX_ColorSet().
Parameters
Parameters Description
left defines the left most pixel of the shape.
top defines the top most pixel of the shape.
right defines the right most pixel of the shape.
bottom defines the bottom most pixel of the shape.
Returns
TBA (see GFX_STATUS).
Example
// assume RED is a macro that define GFX_COLOR types
GFX_STATUS status;
// assume BackGroundImage is a valid image already draw
// on the screen
GFX_RESOURCE_HDR *pMyBackgroundImage = &BackGroundImage;
// render a RED bar
GFX_FillStyleSet(GFX_FILL_STYLE_COLOR);
GFX_ColorSet(RED);
status = GFX_BarDraw(10, 110, 100, 200);
// render an alpha blended bar with
// the current contents of the frame buffer
GFX_FillStyleSet(GFX_FILL_STYLE_ALPHA_COLOR);
GFX_BackgroundTypeSet(GFX_BACKGROUND_DISPLAY_BUFFER);
GFX_ColorSet(RED);
status = GFX_BarDraw(10, 110, 100, 200);
// render an alpha blended bar with a background image
GFX_FillStyleSet(GFX_FILL_STYLE_ALPHA_COLOR);
// color value here has no effect since the background set
// is type GFX_BACKGROUND_IMAGE
GFX_BackgroundSet(0, 0, pMyBackGroundImage, 0);
GFX_BackgroundTypeSet(GFX_BACKGROUND_IMAGE);
GFX_ColorSet(RED);
status = GFX_BarDraw(10, 110, 100, 200);
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5.2.2.7.21.18 GFX_BarGradientDraw Function
C
GFX_STATUS GFX_BarGradientDraw(
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom
);
Description
This renders a bar onto the screen, but instead of one color, a gradient is drawn depending on the direction
(GFX_GRADIENT_TYPE), length, and colors chosen. This function is a blocking call.
Preconditions
Gradient feature must be enabled.
Parameters
Parameters Description
left x position of the left top corner.
top y position of the left top corner.
right x position of the right bottom corner.
bottom y position of the right bottom corner.
color1 start color for the gradient
color2 end color for the gradient
length From 0-100%. How much of a gradient is wanted
direction Gradient Direction
Returns
Always returns a 1 since it is a blocking function.
Side Effects
none
Remarks
none
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Example
// draw a full screen gradient background
// with color transitioning from BRIGHTRED to
// BLACK in the upward direction.
GFX_GRADIENT_STYLE gradScheme;
gradScheme.gradientType = GFX_GRADIENT_TYPE_UP;
gradScheme.gradientStartColor = BRIGHTRED;
gradScheme.gradientEndColor = BLACK;
BarGradient(0, //left position
0, //top position
GetMaxX(), //right position
GetMaxY(), //bottom position
gradScheme.gradientStartColor,
gradScheme.gradientEndColor,
50, // at the halfway point (50%) of the
rectangular area
// defined by the first 4 parameters
(full screen),
// the color becomes BLACK and BLACK
color is used until
// the rectangle defined is filled up
gradScheme.gradientType); // see GFX_GRADIENT_TYPE
5.2.2.7.21.19 GFX_BevelDraw Function
C
GFX_STATUS GFX_BevelDraw(
uint16_t x1,
uint16_t y1,
uint16_t x2,
uint16_t y2,
uint16_t rad
);
Description
This is function GFX_BevelDraw.
5.2.2.7.21.20 GFX_BevelDrawTypeGet Function
C
GFX_BEVEL_RENDER_TYPE GFX_BevelDrawTypeGet();
5.2.2.7.21.21 GFX_BevelDrawTypeSet Function
C
void GFX_BevelDrawTypeSet(
GFX_BEVEL_RENDER_TYPE type
);
5.2.2.7.21.22 GFX_BevelGradientDraw Function
C
GFX_STATUS GFX_BevelGradientDraw(
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
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uint16_t rad
);
Description
This renders a filled bevel with gradient color on the fill. It works the same as the fillbevel function, except a gradient out of color1
and color2 is drawn depending on the direction (GFX_GRADIENT_TYPE). This function is a blocking call.
Preconditions
Gradient feature must be enabled.
Parameters
Parameters Description
left x coordinate position of the upper left center of the circle that draws the rounded
corners.
top y coordinate position of the upper left center of the circle that draws the rounded
corners.
right x coordinate position of the lower right center of the circle that draws the rounded
corners.
bottom y coordinate position of the lower right center of the circle that draws the rounded
corners.
rad defines the redius of the circle, that draws the rounded corners. When rad = 0, the
object drawn is a rectangular gradient.
color1 start color for the gradient
color2 end color for the gradient
length From 0-100%. How much of a gradient is wanted
direction see GFX_GRADIENT_TYPE
Returns
Always returns a 1 since it is a blocking function.
Side Effects
none
Remarks
none
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5.2.2.7.21.23 GFX_CircleDraw Function
C
GFX_STATUS GFX_CircleDraw(
uint16_t x,
uint16_t y,
uint16_t radius
);
Description
This function renders a circular shape using the center (x,y) and radius. The shape is rendered using the currently set line style
by GFX_LineStyleSet(). The color used is the color set by the last call to GFX_ColorSet().
When x,y falls outside the buffer, the behavior is undefined. When color is not set before this function is called, the bahavior is
undefined. When any of the following x+radius, x-radius, y+radius and y-radius falls outside the buffer, the behavior is undefined.
Preconditions
Color must be set by GFX_ColorSet(). Line style must be set by GFX_LineStyleSet().
Parameters
Parameters Description
x defines the x-coordinate position of the center of the circle.
y defines the y-coordinate position of the center of the circle.
radius defines the radius of the circle.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.24 GFX_CircleFillDraw Function
C
GFX_STATUS GFX_CircleFillDraw(
uint16_t x,
uint16_t y,
uint16_t radius
);
Description
This function renders a filled circle shape with the currently set fill style (see GFX_FILL_STYLE) with the given left, top, right and
bottom parameters to define the shape dimension. The shape is rendered depending on the fill style. If a flat color is used, color
must be set (see GFX_ColorSet()) before calling this function. If gradient color is used, gradient start and end color must be set
(see GFX_GradientColorSet()) before calling this function. After the fill style and colors are set, multiple calls to this function can
be performed.
The rendering of this shape becomes undefined when any one of the following is true:
• Any of the following pixel locations left,top or right,bottom falls outside the frame buffer.
• Fill style is not set (GFX_FillStyleSet(), before this function is called.
• Colors are not set before this function is called.
• When the center defined by x,y is not on the frame buffer.
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Preconditions
Fill style must be set by GFX_FillStyleSet(). Color must be set by GFX_ColorSet().
Parameters
Parameters Description
x defines the x-coordinate position of the center of the circle.
y defines the y-coordinate position of the center of the circle.
radius defines the radius of the circle.
Returns
TBA (see GFX_STATUS).
Example
// assume BLUE and RED are macros that define GFX_COLOR types
GFX_STATUS status;
APP_TEST_FillStyleSet(GFX_FILL_STYLE_GRADIENT_UP);
GFX_GradientColorSet(BLUE, RED);
status = GFX_CircleFillDraw(50, 110, 150, 200, 20);
if (status == GFX_STATUS_SUCCESS)
// Filled circle was drawn.
else
// Filled circle is not drawn or not yet
// finished rendering. To finish the rendering call the
// function again with the same parameters.
5.2.2.7.21.25 GFX_ColorGet Function
C
GFX_COLOR GFX_ColorGet();
Description
This function returns the color currently set to render primitive shapes and text (See GFX_ColorSet() for more information).
Preconditions
None.
Returns
The currently set color.
Example
TBA
5.2.2.7.21.26 GFX_ColorSet Function
C
void GFX_ColorSet(
GFX_COLOR newColor
);
Description
This function sets the color to be used to render primitive shapes and text. Any primitive shape that is set to any of the following:
GFX_LINE_STYLE
• GFX_LINE_STYLE_THIN_SOLID
• GFX_LINE_STYLE_THIN_DOTTED
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• GFX_LINE_STYLE_THIN_DASHED
• GFX_LINE_STYLE_THICK_SOLID
• GFX_LINE_STYLE_THICK_DOTTED
• GFX_LINE_STYLE_THICK_DASHED
GFX_FILL_STYLE
• GFX_FILL_STYLE_COLOR
will be rendered using the set color.
Rendering text using the GFX_TextCharDraw(), GFX_TextStringDraw() and GFX_TextStringBoxDraw() will also use the set
color.
Preconditions
None.
Parameters
Parameters Description
color the rendering color set to render primitive shapes.
Returns
None.
Example
TBA
5.2.2.7.21.27 GFX_DoubleBufferAreaGet Function
C
GFX_RECTANGULAR_AREA * GFX_DoubleBufferAreaGet(
uint16_t count
);
5.2.2.7.21.28 GFX_DoubleBufferAreaMark Function
C
void GFX_DoubleBufferAreaMark(
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom
);
5.2.2.7.21.29 GFX_DoubleBufferDisable Function
C
GFX_STATUS GFX_DoubleBufferDisable();
5.2.2.7.21.30 GFX_DoubleBufferEnable Function
C
GFX_STATUS GFX_DoubleBufferEnable();
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5.2.2.7.21.31 GFX_DoubleBufferStatusGet Function
C
GFX_FEATURE_STATUS GFX_DoubleBufferStatusGet();
5.2.2.7.21.32 GFX_DoubleBufferSyncAllStatusClear Function
C
GFX_STATUS GFX_DoubleBufferSyncAllStatusClear();
5.2.2.7.21.33 GFX_DoubleBufferSyncAllStatusGet Function
C
GFX_FEATURE_STATUS GFX_DoubleBufferSyncAllStatusGet();
5.2.2.7.21.34 GFX_DoubleBufferSyncAllStatusSet Function
C
GFX_STATUS GFX_DoubleBufferSyncAllStatusSet();
5.2.2.7.21.35 GFX_DoubleBufferSyncAreaCountGet Function
C
unsigned int GFX_DoubleBufferSyncAreaCountGet();
5.2.2.7.21.36 GFX_DoubleBufferSyncAreaCountSet Function
C
void GFX_DoubleBufferSyncAreaCountSet(
unsigned int count
);
5.2.2.7.21.37 GFX_DoubleBufferSynchronize Function
C
GFX_STATUS GFX_DoubleBufferSynchronize();
5.2.2.7.21.38 GFX_DoubleBufferSynchronizeCancel Function
C
GFX_STATUS GFX_DoubleBufferSynchronizeCancel();
5.2.2.7.21.39 GFX_DoubleBufferSynchronizeRequest Function
C
GFX_STATUS GFX_DoubleBufferSynchronizeRequest();
5.2.2.7.21.40 GFX_DoubleBufferSynchronizeSet Function
C
GFX_STATUS GFX_DoubleBufferSynchronizeSet();
5.2.2.7.21.41 GFX_DoubleBufferSynchronizeStatusGet Function
C
GFX_FEATURE_STATUS GFX_DoubleBufferSynchronizeStatusGet();
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5.2.2.7.21.42 GFX_DoubleBufferVisualPageUpdate Function
C
GFX_STATUS GFX_DoubleBufferVisualPageUpdate();
Description
None
Preconditions
None
Parameters
Parameters Description
None None
Returns
None
Example
None
5.2.2.7.21.43 GFX_DrawBufferGet Function
C
int GFX_DrawBufferGet();
5.2.2.7.21.44 GFX_DrawBufferSelect Function
C
GFX_STATUS GFX_DrawBufferSelect(
int index
);
5.2.2.7.21.45 GFX_DrawBufferSet Function
C
GFX_STATUS GFX_DrawBufferSet(
int index,
uint32_t address
);
5.2.2.7.21.46 GFX_DRV_FontSet Function
C
void GFX_DRV_FontSet(
GFX_RESOURCE_HDR * pFont
);
Description
This is function GFX_DRV_FontSet.
5.2.2.7.21.47 GFX_DRV_TextStringWidthGet Function
C
uint16_t GFX_DRV_TextStringWidthGet(
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GFX_XCHAR* textString,
GFX_RESOURCE_HDR * pFont
);
Description
This is function GFX_DRV_TextStringWidthGet.
5.2.2.7.21.48 GFX_ExternalCharInfoGet Function
C
void GFX_ExternalCharInfoGet(
GFX_XCHAR ch,
GFX_FONT_OUTCHAR * pParam
);
Description
This is function GFX_ExternalCharInfoGet.
5.2.2.7.21.49 GFX_ExternalResourceCallback Function
C
GFX_STATUS GFX_ExternalResourceCallback(
GFX_RESOURCE_HDR * pResource,
uint32_t offset,
uint16_t nCount,
void * pBuffer
);
Description
This function must be implemented in the application. The library will call this function each time when the external memory data
will be required. The application must copy requested uint8_ts quantity into the buffer provided. Data start address in external
memory is a sum of the address in GFX_EXTDATA structure and offset.
Parameters
Parameters Description
memory Pointer to the external memory bitmap or font structures (FONT_EXTERNAL or
BITMAP_EXTERNAL).
offset Data offset.
nCount Number of uint8_ts to be transferred into the buffer.
buffer Pointer to the buffer.
Returns
Returns the number of uint8_ts were transferred.
Side Effects
none
Example
// If there are several memories in the system they can be selected by IDs.
// In this example, ID for memory device used is assumed to be 0.
#define X_MEMORY 0
uint16_t ExternalMemoryCallback(GFX_IMAGE_HEADER* memory, int32_t offset, uint16_t nCount,
void* buffer) {
int i;
long address;
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// Address of the requested data is a start address of the object referred by GFX_EXTDATA
structure plus offset
address = memory->address+offset;
if(memory->ID == X_MEMORY){
// MemoryXReaduint8_t() is some function implemented to access external memory.
// Implementation will be specific to the memory used. In this example
// it reads uint8_t each time it is called.
i = 0;
while (i < nCount) {
(uint8_t*)buffer = MemoryXReaduint8_t(address++);
i++;
}
}
// return the actual number of uint8_ts retrieved
return (i);
}
5.2.2.7.21.50 GFX_FillStyleGet Function
C
GFX_FILL_STYLE GFX_FillStyleGet();
Description
This function returns the fill style used (see GFX_FILL_STYLE) when rendering filled shapes.
Preconditions
None.
Returns
The current fill style used (see GFX_FILL_STYLE).
Example
TBA
5.2.2.7.21.51 GFX_FillStyleSet Function
C
GFX_STATUS GFX_FillStyleSet(
GFX_FILL_STYLE style
);
Description
This function sets the fill style to be used (see GFX_FILL_STYLE) when rendering filled shapes. All calls to the following:
• GFX_RectangleFillDraw()
• GFX_RectangleRoundFillDraw()
• GFX_CircleFillDraw()
will use the fill style set by this function.
Preconditions
None.
Parameters
Parameters Description
style The specified fill style to be used.
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Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.52 GFX_FlashCharInfoGet Function
C
void GFX_FlashCharInfoGet(
GFX_XCHAR ch,
GFX_FONT_OUTCHAR * pParam
);
Description
This is function GFX_FlashCharInfoGet.
5.2.2.7.21.53 GFX_FontAntiAliasGet Function
C
GFX_FONT_ANTIALIAS_TYPE GFX_FontAntiAliasGet();
Description
This function returns the font anti-aliasing mode used when rendering anti-aliased strings and characters. Default setting at
initialization is GFX_FONT_ANTIALIAS_OPAQUE.
Preconditions
None.
Returns
The font anti-aliasing mode used.
Example
TBA
5.2.2.7.21.54 GFX_FontAntiAliasSet Function
C
GFX_STATUS GFX_FontAntiAliasSet(
GFX_FONT_ANTIALIAS_TYPE type
);
Description
This function sets the font anti-aliasing mode used when rendering anti-aliased strings and characters.
Preconditions
None.
Parameters
Parameters Description
type anti-aliasing mode selected. See GFX_FONT_ANTIALIAS_TYPE for details.
Returns
The status of the set anti-aliasing mode action.
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Example
TBA
5.2.2.7.21.55 GFX_FontGet Function
C
GFX_RESOURCE_HDR* GFX_FontGet();
Description
This function returns the current font used to render strings and characters.
Preconditions
GFX_FontSet() must be called prior to any call to this function. If this function is called first, the returned value is undefined.
Returns
The pointer to the current font used in rendering strings and characters.
Example
TBA
5.2.2.7.21.56 GFX_FontSet Function
C
GFX_STATUS GFX_FontSet(
GFX_RESOURCE_HDR * pFont
);
Description
This function sets the current font used to render strings and characters.
Preconditions
None.
Parameters
Parameters Description
pFont pointer to the font to be used.
Returns
The status of the set font action.
Example
TBA
5.2.2.7.21.57 GFX_FrameBufferGet Function
C
int GFX_FrameBufferGet();
5.2.2.7.21.58 GFX_FrameBufferSelect Function
C
GFX_STATUS GFX_FrameBufferSelect(
int index
);
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5.2.2.7.21.59 GFX_GradientColorSet Function
C
GFX_STATUS GFX_GradientColorSet(
GFX_COLOR startColor,
GFX_COLOR endColor
);
Description
This function sets the gradient fill start and end colors (see GFX_FILL_STYLE) when rendering gradient filled shapes. All
subsequent calls to the following using gradient fills:
• GFX_RectangleFillDraw()
• GFX_RectangleRoundFillDraw()
• GFX_CircleFillDraw()
will use the start and end colors set by this function.
Preconditions
None.
Parameters
Parameters Description
startColor Gradient start color to be used.
endColor Gradient end color to be used.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.60 GFX_GradientEndColorGet Function
C
GFX_COLOR GFX_GradientEndColorGet();
Description
This function returns the end color used when rendering gradient filled shapes.
Preconditions
None.
Returns
The current gradient end color used.
Example
TBA
5.2.2.7.21.61 GFX_GradientStartColorGet Function
C
GFX_COLOR GFX_GradientStartColorGet();
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Description
This function returns the start color used when rendering gradient filled shapes.
Preconditions
None.
Returns
The current gradient start color used.
Example
TBA
5.2.2.7.21.62 GFX_ImageDraw Function
C
GFX_STATUS GFX_ImageDraw(
uint16_t left,
uint16_t top,
GFX_RESOURCE_HDR * pImage
);
Description
This function renders an image to the frame buffer with the left-top corner of the image located at given left, top parameters.
The rendering of this shape becomes undefined when any one of the following is true:
• left, top pixel position falls outside the frame buffer.
• pointer is not properly initialized to a GFX_RESOURCE_HDR object.
Preconditions
None.
Parameters
Parameters Description
left Horizontal starting position of the image.
top Vertical starting position of the image.
pImage Pointer to the image to be rendered.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.63 GFX_ImageHeaderGet Function
C
inline void GFX_ImageHeaderGet(
GFX_RESOURCE_HDR * pImage,
GFX_MCHP_BITMAP_HEADER * pBitmapHdr
);
Description
This function fills the given bitmap header with the image's header information. This function results in an undefined behavior if
the pointer to the image is invalid.
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Preconditions
None.
Parameters
Parameters Description
pImage Pointer to the image.
pBitmap Pointer to the destination of the header information.
Returns
None.
Example
TBA
5.2.2.7.21.64 GFX_ImageHeightGet Function
C
inline int16_t GFX_ImageHeightGet(
GFX_RESOURCE_HDR * pImage
);
Description
This function returns the height of the given image in pixels. This function results in an undefined behavior if the pointer to the
image is invalid.
This function return value is undefined if the given pointer does not point to a valid image resource.
Preconditions
None.
Parameters
Parameters Description
pImage Pointer to the image.
Returns
The image height in pixels.
Example
TBA
5.2.2.7.21.65 GFX_ImageOffsetAddressGet Function
C
uint32_t GFX_ImageOffsetAddressGet(
uint32_t address,
uint16_t xOffset,
uint16_t yOffset,
uint16_t width
);
Description
This is function GFX_ImageOffsetAddressGet.
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5.2.2.7.21.66 GFX_ImagePartialDraw Function
C
GFX_STATUS GFX_ImagePartialDraw(
uint16_t destination_x,
uint16_t destination_y,
uint16_t source_x_offset,
uint16_t source_y_offset,
uint16_t source_width,
uint16_t source_height,
GFX_RESOURCE_HDR * pImage
);
Description
This function renders an image or a portion of an image to the frame buffer with the top, left corner of the image located at
destination_x, destination_y. To render a full image, source_x_offset, source_y_offset, width and height are set to all 0. Using
the actual image's width and height will also work if these are known. If they are not known, avoid the extra extra step to get the
image's width and height by assigning 0 to the parameters. Another way to render a full image is to use the GFX_ImageDraw().
The image to be rendered is defined by the pointer pImage.
The rendering of this shape becomes undefined when any one of the following is true:
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• destination_x, destination_y pixel position falls outside the frame buffer.
• source_x_offset, source_y_offset results in a starting position beyond the image's dimension.
• source_width and/or source_height is larger than the actual image's width and height.
• pointer is not properly initialized to a GFX_RESOURCE_HDR object.
Preconditions
None.
Parameters
Parameters Description
destination_x Horizontal starting position of the image.
destination_y Vertical starting position of the image.
source_x_offset Horizontal offset in pixels of the starting position of the partial area of the image to
be rendered. Set to 0 along with source_y_offset when rendering the full image.
source_y_offset Vertical offset in pixels of the starting position of the partial area of the image to be
rendered. Set to 0 along with source_x_offset when rendering the full image.
source_width The width of the partial area of the image to be rendered. Set to 0 along with
source_height when rendering the full image.
source_height The height of the partial area of the image to be rendered. Set to 0 along with
source_width when rendering the full image.
pImage Pointer to the image to be rendered.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.67 GFX_ImageWidthGet Function
C
inline int16_t GFX_ImageWidthGet(
GFX_RESOURCE_HDR * pImage
);
Description
This function returns the width of the given image in pixels. This function results in an undefined behavior if the pointer to the
image is invalid.
This function return value is undefined if the given pointer does not point to a valid image resource.
Preconditions
None.
Parameters
Parameters Description
pImage Pointer to the image.
Returns
The image width in pixels.
Example
TBA
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5.2.2.7.21.68 GFX_Initialize Function
C
void GFX_Initialize();
Description
This function initialize the Graphics Library primitive layer and Graphics Object Layer if it is enabled. The following default
settings are set when this function is called.
1. font - Set to NULL. GFX_FontSet() must be called prior to any text rendering.
2. line type - Set to GFX_LINE_TYPE_THIN_SOLID (see GFX_LINE_STYLE).
3. fill type - Set to GFX_FILL_TYPE_COLOR (see GFX_FILL_STYLE).
4. text anti-alias type - Set to GFX_FONT_ANTIALIAS_OPAQUE (see GFX_FONT_ANTIALIAS_TYPE). This only affects fonts
with anti-aliasing enabled.
This function does not clear the screen and does not assign any color to the currently set color. Application should set the color
and clear the screen.
Preconditions
None.
Returns
None.
Example
TBA
5.2.2.7.21.69 GFX_Layer Function
C
GFX_STATUS GFX_Layer(
uint8_t layer,
uint8_t action,
uint16_t param1,
uint16_t param2
);
Description
None
Preconditions
None
Parameters
Parameters Description
None None
Returns
None
Example
None
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5.2.2.7.21.70 GFX_LineDraw Function
C
GFX_STATUS GFX_LineDraw(
uint16_t x1,
uint16_t y1,
uint16_t x2,
uint16_t y2
);
Description
This function renders a line from x1,y1 to x2,y2 using the currently set line style set by GFX_LineStyleSet(). The color used is the
color set by the last call to GFX_ColorSet().
If x1,y1 and/or x2,y2 is not on the frame buffer, then the behavior is undefined. If color is not set, before this function is called,
the output is undefined.
Preconditions
Color must be set by GFX_ColorSet(). Line style must be set by GFX_LineStyleSet().
Parameters
Parameters Description
x1 x coordinate of the line start point.
y1 y coordinate of the line start point.
x2 x coordinate of the line end point.
y2 y coordinate of the line end point.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.71 GFX_LinePositionRelativeSet Function
C
GFX_STATUS GFX_LinePositionRelativeSet(
int16_t x,
int16_t y
);
Description
This function sets the line cursor to a new (x,y) position relative to the current cursor position. The new position is calculated by
(x+dX, y + dY).
Line cursor is used as a starting point of the line rendered by the GFX_LineToDraw() and GFX_LineToRelativeDraw() functions.
Note that the parameters dX and dY are signed integers. This allows the new line cursor position to be placed to any direction
from the current line cursor position.
If (x+dX) and/or (y+dY) results in a position that is not on the frame buffer, then the behavior of GFX_LineToDraw() and
GFX_LineToRelativeDraw() functions are undefined. If color is not set, before this function is called, the output is undefined.
Preconditions
None.
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Parameters
Parameters Description
dX the offset for the x position that will define the new x-coordinate position of the line
cursor.
dY the offset for the y position that will define the new y-coordinate position of the line
cursor.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.72 GFX_LinePositionSet Function
C
GFX_STATUS GFX_LinePositionSet(
uint16_t x,
uint16_t y
);
Description
This function sets the line cursor to a new (x,y) position. Line cursor is used as a starting point of the line rendered by the
GFX_LineToDraw() and GFX_LineToRelativeDraw() functions.
If x and/or y does not lie on the frame buffer, then the behavior of GFX_LineToDraw() and GFX_LineToRelativeDraw() functions
are undefined.
Preconditions
None.
Parameters
Parameters Description
x new x coordinate position of the line cursor.
y new y coordinate position of the line cursor.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.73 GFX_LinePositionXGet Function
C
int16_t GFX_LinePositionXGet();
Description
This function returns the current x position of the line cursor. Line cursor is used as a starting point of the line rendered by the
GFX_LineToDraw() and GFX_LineToRelativeDraw() functions.
Preconditions
None.
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Returns
The current line cursor x position.
Example
TBA
5.2.2.7.21.74 GFX_LinePositionYGet Function
C
int16_t GFX_LinePositionYGet();
Description
This function returns the current y position of the line cursor. Line cursor is used as a starting point of the line rendered by the
GFX_LineToDraw() and GFX_LineToRelativeDraw() functions.
Preconditions
None.
Returns
The current line cursor y position.
Example
TBA
5.2.2.7.21.75 GFX_LineStyleGet Function
C
GFX_LINE_STYLE GFX_LineStyleGet();
Description
This function returns the line style used (see GFX_LINE_STYLE) when rendering lines.
Preconditions
None.
Returns
The current line style used (see GFX_LINE_STYLE).
Example
TBA
5.2.2.7.21.76 GFX_LineStyleSet Function
C
GFX_STATUS GFX_LineStyleSet(
GFX_LINE_STYLE style
);
Description
This function sets the line style to be used (see GFX_LINE_STYLE) when rendering lines. All calls to the following functions
• GFX_LineDraw()
• GFX_LineToDraw()
• GFX_LineToRelativeDraw()
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• GFX_CircleDraw()
• GFX_RectangleDraw()
• GFX_PolygonDraw()
will use the line style set by this function. In addition, all unfilled shapes that does specify the line style to be used will use the line
style specified by this function.
Preconditions
None.
Parameters
Parameters Description
style The specified line style to be used.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.77 GFX_LineToDraw Function
C
GFX_STATUS GFX_LineToDraw(
int16_t x2,
int16_t y2
);
Description
This function renders a line from current line cursor position (x,y) to (x2,y2) using the currently set line style set by
GFX_LineStyleSet(). The color used is the color set by the last call to GFX_ColorSet().
If x2 and/or y2 does not lie on the frame buffer, then the behavior is undefined. If color is not set, before this function is called,
the output is undefined.
Preconditions
Color must be set by GFX_ColorSet(). Line style must be set by GFX_LineStyleSet().
Parameters
Parameters Description
x2 x coordinate of the line end point.
y2 y coordinate of the line end point.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.78 GFX_LineToRelativeDraw Function
C
GFX_STATUS GFX_LineToRelativeDraw(
int16_t dX,
int16_t dY
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);
Description
This function renders a line from current line cursor position (x,y) to (x+dX,y+dY) using the currently set line style set by
GFX_LineStyleSet(). The color used is the color set by the last call to GFX_ColorSet(). Note that the parameters dX and dY are
signed integers. This allows the line to be drawn from the line cursor to any direction.
If (x+dX) and/or (y+dY) results in a position that is not on the frame buffer, then the behavior is undefined. If color is not set,
before this function is called, the output is undefined.
Preconditions
Color must be set by GFX_ColorSet(). Line style must be set by GFX_LineStyleSet().
Parameters
Parameters Description
dX the offset for the x starting position that will define the x-coordinate of the end of
the line.
dY the offset for the y starting position that will define the y-coordinate of the end of
the line.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.79 GFX_PageSet Function
C
GFX_STATUS GFX_PageSet(
uint8_t pageType,
uint8_t page
);
Example
Remarks:
5.2.2.7.21.80 GFX_PolygonDraw Function
C
GFX_STATUS GFX_PolygonDraw(
uint16_t numPoints,
uint16_t * polyPoints
);
Description
This function renders a polygon using the currently set line style (see GFX_LineStyleSet()) and color (see GFX_ColorSet()). The
shape of the polygon is determined by the polygon points (an ordered array of x,y pairs) where the pair count is equal to the
parameter sides.
If any of the x,y pairs do not lie on the frame buffer, then the behavior is undefined. If color is not set, before this function is
called, the output is undefined.
Preconditions
Color must be set by GFX_ColorSet(). Line style must be set by GFX_LineStyleSet().
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Parameters
Parameters Description
sides the number of sides of the polygon.
pPoints Pointer to the array of polygon points. The array defines the x,y points of the
polygon. The sequence should be x0, y0, x1, y1, x2, y2, ... xn, yn where n is the #
of polygon sides.
Returns
TBA (see GFX_STATUS).
Example
uint16_t OpenShapeXYPoints[6] = {10, 10, 20, 10, 20, 20};
uint16_t ClosedShapeXYPoints[8] = {10, 10, 20, 10, 20, 20, 10, 10};
GFX_ColorSet(WHITE); // set color
SetLineType(GFX_LINE_STYLE_THIN_DOTTED); // set line style
GFX_PolygonDraw(3, OpenShapeXYPoints); // draw an open shape
GFX_PolygonDraw(4, ClosedShapeXYPoints); // draw a closed shape
5.2.2.7.21.81 GFX_Primitive_Initialize Function
C
inline void GFX_Primitive_Initialize();
Description
This is function GFX_Primitive_Initialize.
5.2.2.7.21.82 GFX_RectangleDraw Function
C
GFX_STATUS GFX_RectangleDraw(
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom
);
Description
This function renders a rectangular shape using the given left, top, right and bottom parameters to define the shape dimension.
The shape is rendered using the currently set line style by GFX_LineStyleSet(). The color used is the color set by the last call to
GFX_ColorSet().
The rendering of this shape becomes undefined when any one of the following is true:
• Any of the following pixel locations left,top, right,bottom falls outside the frame buffer.
• Color is not set, before this function is called.
• right < left
• bottom < top
Preconditions
Color must be set by GFX_ColorSet(). Line style must be set by GFX_LineStyleSet().
Parameters
Parameters Description
left defines the left most pixel of the shape.
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top defines the top most pixel of the shape.
right defines the right most pixel of the shape.
bottom defines the bottom most pixel of the shape.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.83 GFX_RectangleFillDraw Function
C
GFX_STATUS GFX_RectangleFillDraw(
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom
);
Description
This function renders a filled rectangular shape with the currently set fill style (see GFX_FILL_STYLE) with the given left, top,
right, and bottom parameters to define the shape dimension. The shape is rendered depending on the fill style. If a flat color is
used, color must be set (see GFX_ColorSet()) before calling this function. If gradient color is used, gradient start and end color
must be set (see GFX_GradientColorSet()) before calling this function. After the fill style and colors are set, multiple calls to this
function can be performed.
The rendering of this shape becomes undefined when any one of the following is true:
• Any of the following pixel locations left,top or right,bottom falls outside the frame buffer.
• Fill style is not set (GFX_FillStyleSet(), before this function is called.
• Colors are not set before this function is called.
• When right < left
• When bottom < top
• When pixel locations defined by left, top and/or right, bottom are not on the frame buffer.
Preconditions
Fill style must be set by GFX_FillStyleSet(). Color must be set by GFX_ColorSet().
Parameters
Parameters Description
left defines the left most pixel of the shape.
top defines the top most pixel of the shape.
right defines the right most pixel of the shape.
bottom defines the bottom most pixel of the shape.
Returns
TBA (see GFX_STATUS).
Example
// assume BLUE and RED are macros that define GFX_COLOR types
GFX_STATUS status;
// render a rectangle with gradient colors from BLUE to RED
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GFX_FillStyleSet(GFX_FILL_STYLE_GRADIENT_LEFT);
GFX_GradientColorSet(BLUE, RED);
status = GFX_RectangleFillDraw(10, 110, 100, 200);
// render an alpha blended rounded rectangle with
// the current contents of the frame buffer
GFX_FillStyleSet(GFX_FILL_STYLE_ALPHA_COLOR);
GFX_AlphaBlendingValueSet(50);
GFX_BackgroundTypeSet(GFX_BACKGROUND_DISPLAY_BUFFER);
GFX_ColorSet(RED);
status = GFX_RectangleRoundFillDraw(10, 110, 100, 200);
// render an alpha blended rectangle with an image
GFX_FillStyleSet(GFX_FILL_STYLE_ALPHA_COLOR);
GFX_AlphaBlendingValueSet(50);
GFX_BackgroundTypeSet(GFX_BACKGROUND_IMAGE);
GFX_ColorSet(RED);
status = GFX_RectangleFillDraw(10, 110, 100, 200);
// render a plain RED rounded rectangle
GFX_FillStyleSet(GFX_FILL_STYLE_COLOR);
GFX_ColorSet(RED);
status = GFX_RectangleFillDraw(10, 110, 100, 200);
5.2.2.7.21.84 GFX_RectangleRoundDraw Function
C
GFX_STATUS GFX_RectangleRoundDraw(
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t radius
);
Description
This function renders a rectangular shape with rounded corner using the given left, top, right, bottom and radius parameters to
define the shape dimension. radius defines the rounded corner shape. The shape is rendered using the currently set line style by
GFX_LineStyleSet(). The color used is the color set by the last call to GFX_ColorSet().
Left most pixel location is defined by left - radius. Top most pixel location is defined by top - radius. Right most pixel location is
defined by right + radius. Bottom most pixel location is defined by bottom + radius. When radius = 0, there are no rounded
corners. In this case (left,top) will define the left, top corner and (right,bottom) will define the right, bottom corner of the shape.
When left = right and top = bottom, with radius > 0, a circular object is drawn. When left < right and top < bottom and radius = 0,
a rectangular object is drawn.
The rendering of this shape becomes undefined when any one of the following is true:
• Any of the following pixel locations left-rad , top-rad, right+rad, bottom+rad falls outside the frame buffer.
• Color is not set, before this function is called.
• right < left
• bottom < top
Preconditions
Color must be set by GFX_ColorSet(). Line style must be set by GFX_LineStyleSet().
Parameters
Parameters Description
left Along with rad (left - rad), defines the left most pixel of the shape.
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top Along with rad (top - rad), defines the top most pixel of the shape.
right Along with rad (right + rad), defines the right most pixel of the shape.
bottom Along with rad (bottom + rad), defines the bottom most pixel of the shape.
radius defines the rounded corners. When this is set to zero, there will be no rounded
corners.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.85 GFX_RectangleRoundFillDraw Function
C
GFX_STATUS GFX_RectangleRoundFillDraw(
uint16_t left,
uint16_t top,
uint16_t right,
uint16_t bottom,
uint16_t radius
);
Description
This function renders a filled rounded rectangular shape with the currently set fill style (see GFX_FILL_STYLE) with the given
left, top, right, bottom and radius parameters to define the shape dimension. The shape is rendered depending on the fill style. If
a flat color is used, color must be set (see GFX_ColorSet()) before calling this function. If gradient color is used, gradient start
and end color must be set (see GFX_GradientColorSet()) before calling this function. After the fill style and colors are set,
multiple calls to this function can be performed.
The rendering of this shape becomes undefined when any one of the following is true:
• Any of the following pixel locations left,top or right,bottom falls outside the frame buffer.
• Fill style is not set (GFX_FillStyleSet(), before this function is called.
• Colors are not set before this function is called.
• When right < left
• When bottom < top
• When pixel locations defined by left, top and/or right, bottom are not on the frame buffer.
Preconditions
Fill style must be set by GFX_FillStyleSet(). Color must be set by GFX_ColorSet().
Parameters
Parameters Description
left defines the left most pixel of the shape.
top defines the top most pixel of the shape.
right defines the right most pixel of the shape.
bottom defines the bottom most pixel of the shape.
radius defines the radius of the rounded corner. A zero value will result in a rectangular
shape drawn.
Returns
TBA (see GFX_STATUS).
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Example
// assume BLUE and RED are macros that define GFX_COLOR types
GFX_STATUS status;
APP_TEST_FillStyleSet(GFX_FILL_STYLE_GRADIENT_DOUBLE_VER);
GFX_GradientColorSet(BLUE, RED);
status = GFX_RectangleFillDraw(50, 110, 150, 200, 20);
if (status == GFX_STATUS_SUCCESS)
// Filled rounded rectangle shape was drawn.
else
// Filled rounded rectangle shape is not drawn or not yet
// finished rendering. To finish the rendering call the
// function again with the same parameters.
5.2.2.7.21.86 GFX_RenderingBufferGet Function
C
GFX_COLOR * GFX_RenderingBufferGet();
Description
Returns the location of the internal rendering buffer used in rendering images and filled objects with alpha blending.
Preconditions
None.
Returns
The address of the rendering buffer.
Example
None.
5.2.2.7.21.87 GFX_RenderToDisplayBufferDisable Function
C
void GFX_RenderToDisplayBufferDisable();
Description
This is function GFX_RenderToDisplayBufferDisable.
5.2.2.7.21.88 GFX_RenderToDisplayBufferDisableFlagGet Function
C
uint16_t GFX_RenderToDisplayBufferDisableFlagGet();
Description
This is function GFX_RenderToDisplayBufferDisableFlagGet.
5.2.2.7.21.89 GFX_RenderToDisplayBufferEnable Function
C
void GFX_RenderToDisplayBufferEnable();
Description
This is function GFX_RenderToDisplayBufferEnable.
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5.2.2.7.21.90 GFX_ScreenClear Function
C
GFX_STATUS GFX_ScreenClear();
Description
This function clears the screen with the current color and sets the line cursor position to (0, 0).
If color is not set, before this function is called, the output is undefined.
If the function returns GFX_STATUS_FAILURE, clearing is not yet finished. Application must call the function again to continue
the clearing.
Preconditions
Color must be set by GFX_ColorSet().
None.
Returns
The status of the screen clearing.
• GFX_STATUS_SUCCESS - screen was cleared.
• GFX_STATUS_FAILURE - screen is not yet cleared
Example
TBA
5.2.2.7.21.91 GFX_SetTransitionParameters Function
C
uint8_t GFX_SetTransitionParameters(
short left,
short top,
GFX_TRANSITION_TYPE type,
uint8_t sourcePage,
uint8_t destinationPage,
uint16_t delay_ms,
uint16_t param1,
uint16_t param2
);
Description
This sets up the transition effect using the GFX_TRANSITION_TYPE and the given parameters. The actual transition execution
will occur when GFXExecutePendingTransition() is called. When DOUBLE_BUFFERING is enabled,
GFXExecutePendingTransition() is executed after the current screen is fully rendered.
Parameters
Parameters Description
left left x coordinate
top top y coordinate
right right x coordinate
bottom bottom y coordinate
type Transition type
delay_ms Delay in milli seconds between redraws in the screen while executing the transition
param1 Transition-type specific parameter
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param2 Transition-type specific parameter
Returns
Returns success of the setup
• 0 : Parameters successfully saved for the new transition
• -1 : Parameters not saved, there is a pending transition
5.2.2.7.21.92 GFX_SolidLineDraw Function
C
GFX_STATUS GFX_SolidLineDraw(
uint16_t x1,
uint16_t y1,
uint16_t x2,
uint16_t y2
);
Description
This is function GFX_SolidLineDraw.
5.2.2.7.21.93 GFX_StyledLineDraw Function
C
GFX_STATUS GFX_StyledLineDraw(
uint16_t x1,
uint16_t y1,
uint16_t x2,
uint16_t y2
);
Description
This is function GFX_StyledLineDraw.
5.2.2.7.21.94 GFX_TextAreaBottomGet Function
C
uint16_t GFX_TextAreaBottomGet();
Description
This is function GFX_TextAreaBottomGet.
5.2.2.7.21.95 GFX_TextAreaBottomSet Function
C
void GFX_TextAreaBottomSet(
uint16_t bottom
);
Description
This is function GFX_TextAreaBottomSet.
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5.2.2.7.21.96 GFX_TextAreaLeftGet Function
C
uint16_t GFX_TextAreaLeftGet();
Description
This is function GFX_TextAreaLeftGet.
5.2.2.7.21.97 GFX_TextAreaLeftSet Function
C
void GFX_TextAreaLeftSet(
uint16_t left
);
Description
This is function GFX_TextAreaLeftSet.
5.2.2.7.21.98 GFX_TextAreaRightGet Function
C
uint16_t GFX_TextAreaRightGet();
Description
This is function GFX_TextAreaRightGet.
5.2.2.7.21.99 GFX_TextAreaRightSet Function
C
void GFX_TextAreaRightSet(
uint16_t right
);
Description
This is function GFX_TextAreaRightSet.
5.2.2.7.21.100 GFX_TextAreaTopGet Function
C
uint16_t GFX_TextAreaTopGet();
Description
This is function GFX_TextAreaTopGet.
5.2.2.7.21.101 GFX_TextAreaTopSet Function
C
void GFX_TextAreaTopSet(
uint16_t top
);
Description
This is function GFX_TextAreaTopSet.
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5.2.2.7.21.102 GFX_TextCharDraw Function
C
GFX_STATUS GFX_TextCharDraw(
GFX_XCHAR ch
);
Description
This function renders the given character using the currently set font, and color to the location defined by the text cursor position.
The color is set by GFX_ColorSet() while the font is set by GFX_FontSet(). The text cursor position is set by
GFX_TextCursorPositionSet()
The rendering of the character becomes undefined when any one of the following is true:
• Text cursor position is set to locations outside the frame buffer.
• Color is not set, before this function is called.
• Font is not set, before this function is called.
Preconditions
Color must be set by GFX_ColorSet(). Font must be set by GFX_FontSet(). Text cursor position must be set by
GFX_TextCursorPositionSet().
Parameters
Parameters Description
ch character ID that of the character that will be rendered.
Returns
The status of the character rendering.
• GFX_STATUS_SUCCESS - the character was rendered
• GFX_STATUS_FAILURE - the character was not rendered, function must be called again to render the character.
• GFX_STATUS_ERROR - the character ID passed is not a valid or points to the character glyph that does does not exist on
the font table.
Example
// assume textString is a string of characters
static uint16_t counter = 0;
GFX_XCHAR ch;
GFX_STATUS status;
// render characters until null character
while((GFX_XCHAR)(ch = *(textString + counter)) != 0)
{
status = GFX_TextCharDraw(ch);
if (status != GFX_STATUS_SUCCESS)
return (GFX_STATUS_FAILURE);
counter++;
}
5.2.2.7.21.103 GFX_TextCursorPositionSet Function
C
GFX_STATUS GFX_TextCursorPositionSet(
int16_t x,
int16_t y
);
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Description
This function sets the text cursor to a new (x,y) position. Text cursor is used as a starting point of the character rendered by the
GFX_TextCharDraw() function.
If x and/or y does not lie on the frame buffer, then the behavior of GFX_TextCharDraw() function is undefined.
Preconditions
None.
Parameters
Parameters Description
x new x coordinate position of the text cursor.
y new y coordinate position of the text cursor.
Returns
TBA (see GFX_STATUS).
Example
TBA
5.2.2.7.21.104 GFX_TextCursorPositionXGet Function
C
int16_t GFX_TextCursorPositionXGet();
Description
This function returns the current x position of the text cursor. Text cursor is used as a starting point of the line rendered by the
GFX_TextCharDraw() function.
Preconditions
None.
Returns
The current text cursor x position.
Example
TBA
5.2.2.7.21.105 GFX_TextCursorPositionYGet Function
C
int16_t GFX_TextCursorPositionYGet();
Description
This function returns the current y position of the text cursor. Text cursor is used as a starting point of the line rendered by the
GFX_TextCharDraw() function.
Preconditions
None.
Returns
The current text cursor y position.
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Example
TBA
5.2.2.7.21.106 GFX_TextStringBoxDraw Function
C
GFX_STATUS GFX_TextStringBoxDraw(
uint16_t x,
uint16_t y,
uint16_t width,
uint16_t height,
GFX_XCHAR * pString,
GFX_ALIGNMENT align
);
Description
This function renders the given string using the currently color and font into the rectangular area defined by the given parameters
x,y, width and height. The x,y parameters defines the left, top pixel position of the rectangular area. The width and height defines
the size of the rectangular area. The rectangular area will define the area where the text will be rendered. Meaning all pixels
EXCLUSIVE of the defined rectangle will be the rendering area for the text. If the given string exceeds the rectangular area, any
pixels falling outside and along the defined rectangle (INCLUSIVE of the rectangle) will not be drawn.
The color is set by GFX_ColorSet() while the font is set by GFX_FontSet().
Multiple lines of strings can be rendered. To define string composed of multiple lines, end each line with a new line character
(character ID 0x0A). Each line will be rendered according to the text alignment (See GFX_TEXT_ALIGNMENT).
The rendering of the character becomes undefined when any one of the following is true:
• x, y, width and height defines an area partially or fully outside outside the frame buffer.
• Color is not set, before this function is called.
• Font is not set, before this function is called.
Preconditions
Color must be set by GFX_ColorSet(). Font must be set by GFX_FontSet().
Parameters
Parameters Description
x Horizontal starting position of the rectangular area.
y Vertical position position of the rectangular area.
width Defines the width of the rectangular area.
height Defines the height of the rectangular area.
pString Pointer to the location of the string that will be rendered. String can have multiple
lines where each line is terminated by a new line character.
Returns
The status of the string rendering.
• GFX_STATUS_SUCCESS - the string was rendered
• GFX_STATUS_FAILURE - the string was not rendered, or is not yet finished. The function must be called again to render the
remaining characters or lines.
Example
TODO :need to add example code
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5.2.2.7.21.107 GFX_TextStringDraw Function
C
GFX_STATUS GFX_TextStringDraw(
uint16_t x,
uint16_t y,
GFX_XCHAR * textString
);
Description
This function renders the given string of character using the currently set font, and color to the location defined by the given x,y
position. The color is set by GFX_ColorSet() while the font is set by GFX_FontSet().
The rendering of the character becomes undefined when any one of the following is true:
• x,y position is set to locations outside the frame buffer.
• Color is not set, before this function is called.
• Font is not set, before this function is called.
Preconditions
Color must be set by GFX_ColorSet(). Font must be set by GFX_FontSet().
Parameters
Parameters Description
x Horizontal starting position of the string.
y Vertical position position of the string.
pString Pointer to the location of the string that will be rendered.
Returns
The status of the string rendering.
• GFX_STATUS_SUCCESS - the string was rendered
• GFX_STATUS_FAILURE - the string was not rendered, or is not yet finished. The function must be called again to render the
remaining characters.
Example
// assume textString is a string of characters
static uint16_t counter = 0;
GFX_XCHAR ch;
GFX_STATUS status;
// render characters until null character
while((GFX_XCHAR)(ch = *(textString + counter)) != 0)
{
status = GFX_TextCharDraw(ch);
if (status != GFX_STATUS_SUCCESS)
return (GFX_STATUS_FAILURE);
counter++;
}
5.2.2.7.21.108 GFX_TextStringHeightGet Function
C
inline uint16_t GFX_TextStringHeightGet(
GFX_RESOURCE_HDR * pFont
);
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Description
This function returns the height of the given font in pixels. The given font must be present in the system.
This function return value is undefined if the given pointer does not point to a valid font.
Preconditions
None.
Parameters
Parameters Description
pFont Pointer to the specified font.
Returns
The height of the specified font in pixels.
Example
// assume pMyFont is a pointer initialized to a valid font
uint16_t height, x, y;
// center the text on the screen
height = GFX_TextStringHeightGet(pMyFont);
width = GFX_TextStringWidthGet ( (GFX_XCHAR *)"Hello World",
pMyFont
);
y = (GFX_MaxYGet() - height) >> 1;
x = (GFX_MaxXGet() - width) >> 1;
GFX_TextStringDraw(x, y, (GFX_XCHAR *)"Hello World");
GFX_TextStringDraw(x, y, (GFX_XCHAR *)"Hello World");
5.2.2.7.21.109 GFX_TextStringWidthGet Function
C
uint16_t GFX_TextStringWidthGet(
GFX_XCHAR * textString,
GFX_RESOURCE_HDR * pFont
);
Description
This function returns the width of the given string using the given font in pixels. The given font must be present in the system.
This function return value is undefined if the given pointer does not point to a valid font or one or more characters in the given
string does not exist on the given font.
Preconditions
None.
Parameters
Parameters Description
pString Pointer to the specified string.
pFont Pointer to the specified font.
Returns
The width of the specified string using the specified font in pixels.
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Example
// assume pMyFont is a pointer initialized to a valid font
uint16_t height, x, y;
// center the text on the screen
height = GFX_TextStringHeightGet(pMyFont);
width = GFX_TextStringWidthGet ( (GFX_XCHAR *)"Hello World",
pMyFont
);
y = (GFX_MaxYGet() - height) >> 1;
x = (GFX_MaxXGet() - width) >> 1;
GFX_TextStringDraw(x, y, (GFX_XCHAR *)"Hello World");
5.2.2.7.21.110 GFX_ThickBevelDraw Function
C
uint16_t GFX_ThickBevelDraw(
uint16_t xL,
uint16_t yT,
uint16_t xR,
uint16_t yB,
uint16_t r1,
uint16_t r2,
uint8_t octant
);
Description
This is function GFX_ThickBevelDraw.
5.2.2.7.21.111 GFX_Transition Function
C
GFX_STATUS GFX_Transition(
GFX_TRANSITION_PARAMS* transitionParams,
short width,
short height
);
Description
This immediately executes the transition effect using the GFX_TRANSITION_TYPE and the given parameters.
Returns
Returns status of transition
• 0 : Transition executed successfully
• -1 : Transition not executed
5.2.2.7.21.112 GFX_TransparentColorDisable Function
C
GFX_STATUS GFX_TransparentColorDisable();
Description
This function disables the transparent color feature used in GFX_ImageDraw() and GFX_ImagePartialDraw() functions.
The transparent color feature can only be enabled when the color depth used is 24 or 16 bpp.
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Preconditions
Transparent color feature must be enabled at build time. This is enabled by default and can be disabled by defining the macro
GFX_CONFIG_TRANSPARENT_COLOR_DISABLE in the system.
Returns
The status of the transparent color disable action.
Example
// assume ScreenBackground and RibbonIcon are valid
// image resources
// assume BLACK is a valid GFX_COLOR value
GFX_TransparentColorEnable(BLACK);
GFX_ImageDraw(0,0, (void*)&ScreenBackground);
GFX_ImageDraw(50,50, (void*)&RibbonIcon);
// disable the transparent color feature since the
// next image to render contains black pixels that
// we want to render
GFX_TransparentColorDisable();
GFX_ImageDraw(50,50, (void*)&OverlayImage);
5.2.2.7.21.113 GFX_TransparentColorEnable Function
C
GFX_STATUS GFX_TransparentColorEnable(
GFX_COLOR color
);
Description
This function sets the transparent color used in GFX_ImageDraw() functions and enables the transparent color feature.
When GFX_ImageDraw() or GFX_ImagePartialDraw() is called, any pixels in the image that matches the color value will not be
rendered to the frame buffer.
The transparent color feature can only be enabled when the color depth used is 24 or 16 bpp.
Preconditions
Transparent color feature must be enabled at build time. This is enabled by default and can be disabled by defining the macro
GFX_CONFIG_TRANSPARENT_COLOR_DISABLE in the system.
Parameters
Parameters Description
color the color value selected as the transparent color.
Returns
The status of the transparent color set action.
Example
// assume ScreenBackground and RibbonIcon are valid
// image resources
// assume BLACK is a valid GFX_COLOR value
GFX_TransparentColorEnable(BLACK);
GFX_ImageDraw(0,0, (void*)&ScreenBackground);
GFX_ImageDraw(0,0, (void*)&RibbonIcon);
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5.2.2.7.21.114 GFX_TransparentColorGet Function
C
GFX_COLOR GFX_TransparentColorGet();
Description
This returns the current transparent color set for the transparent color feature used in GFX_ImageDraw() and
GFX_ImagePartialDraw() functions.
The transparent color feature can only be enabled when the color depth used is 24 or 16 bpp.
Preconditions
Transparent color feature must be enabled at build time. This is enabled by default and can be disabled by defining the macro
GFX_CONFIG_TRANSPARENT_COLOR_DISABLE in the system.
Returns
The current transparent color used.
Example
// assume ScreenBackground and RibbonIcon are valid
// image resources
// assume BLACK is a valid GFX_COLOR value
GFX_TransparentColorEnable(BLACK);
GFX_ImageDraw(0,0, (void*)&ScreenBackground);
GFX_ImageDraw(50,50, (void*)&RibbonIcon);
// disable the transparent color feature since the
// next image to render contains black pixels that
// we want to render
if (GFX_TransparentColorGet == BLACK)
GFX_TransparentColorDisable();
GFX_ImageDraw(50,50, (void*)&OverlayImage);
5.2.2.7.21.115 GFX_TransparentColorStatusGet Function
C
GFX_FEATURE_STATUS GFX_TransparentColorStatusGet();
Description
This returns the current transparent color set for the transparent color feature used in GFX_ImageDraw() and
GFX_ImagePartialDraw() functions.
The transparent color feature can only be enabled when the color depth used is 24 or 16 bpp.
Preconditions
Transparent color feature must be enabled at build time. This is enabled by default and can be disabled by defining the macro
GFX_CONFIG_TRANSPARENT_COLOR_DISABLE in the system.
Returns
The current transparent feature status (see GFX_FEATURE_STATUS for details).
Example
// assume ScreenBackground and RibbonIcon are valid
// image resources
// assume BLACK is a valid GFX_COLOR value
if (GFX_TransparentColorStatusGet == GFX_FEATURE_DISABLED)
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GFX_TransparentColorEnable(BLACK);
GFX_ImageDraw(0,0, (void*)&ScreenBackground);
GFX_ImageDraw(50,50, (void*)&RibbonIcon);
// disable the transparent color feature since the
// next image to render contains black pixels that
// we want to render
if (GFX_TransparentColorGet == BLACK)
GFX_TransparentColorDisable();
GFX_ImageDraw(50,50, (void*)&OverlayImage);
5.2.2.7.22 Image Functions
5.2.2.7.22.1 ImageDecoderInit Function
C
void ImageDecoderInit();
Description
This function initializes the global variables to 0 and then initializes the driver. This must be called once before any other function
of the library is called
Returns
None
Side Effects
The graphics driver will be reset
Example
void main(void)
{
ImageInit();
...
}
5.2.2.7.22.2 ImageDecodeTask Function
C
uint8_t ImageDecodeTask();
Description
This function completes one small part of the image decode function
Returns
Status code - '1' means decoding is completed
• '0' means decoding is not yet completed, call this function again
Side Effects
None
Example
IMG_bFullScreenDecode(pImageFile, IMG_JPEG, NULL, NULL);
while(!ImageDecodeTask());
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5.2.2.7.22.3 ImageLoopCallbackRegister Function
C
void ImageLoopCallbackRegister(
IMG_LOOP_CALLBACK pFn
);
Description
This function registers the loop callback function so that the decoder calls this function in every decoding loop. This can be used
by the application program to do maintainance activities such as fetching data, updating the display, etc...
Returns
None
Side Effects
The graphics driver will be reset
Example
void Mainantance(void)
{
...
}
void main(void)
{
ImageInit();
ImageLoopCallbackRegister(Mainantance);
...
}
5.2.2.7.22.4 IMG_vSetboundaries Function
C
void IMG_vSetboundaries();
Description
******* This is not for the user *******
This is used by the individual decoders
5.2.2.7.23 Palette Functions
5.2.2.7.23.1 IsPaletteEnabled Function
C
BYTE IsPaletteEnabled();
Description
Returns if the Palette mode is enabled or not.
Preconditions
none
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Returns
Returns the palette mode status. 1 - If the palette mode is enabled 0 - If the palette mode is disabled
5.2.2.7.23.2 PaletteInit Function
C
void PaletteInit();
Description
Initializes the color look up table (CLUT).
Preconditions
none
Returns
none
Side Effects
All rendering will use the new palette entries.
5.2.2.7.23.3 RequestPaletteChange Function
C
void RequestPaletteChange(
void * pPalette,
uint16_t startEntry,
uint16_t length
);
Description
Loads the palettes from the flash during vertical blanking period if possible, otherwise loads immediately.
Preconditions
Palette must be initialized by PaletteInit().
Parameters
Parameters Description
pPalette Pointer to the palette structure
startEntry Start entry to load (inclusive)
length Number of entries
Returns
none
Side Effects
There may be a slight flicker when the Palette entries are getting loaded one by one.
5.2.2.7.23.4 SetPalette Function
C
BYTE SetPalette(
void * pPalette,
uint16_t startEntry,
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uint16_t length
);
Description
Programs a block of palette entries starting from startEntry and until startEntry + length from the flash immediately.
Preconditions
Palette must be initialized by PaletteInit().
Parameters
Parameters Description
pPalette Pointer to the palette structure
startEntry Start entry to load (inclusive)
length Number of entries
Returns
Returns the status of the palette set. 0 - Set was successful 1 - Set was not successful
Side Effects
There may be a slight flicker when the Palette entries are getting loaded one by one.
5.2.2.7.23.5 SetPaletteBpp Function
C
BYTE SetPaletteBpp(
uint8_t bpp
);
Description
Sets the color look up table (CLUT) number of valid entries.
Preconditions
Palette must be initialized by PaletteInit().
Parameters
Parameters Description
bpp Bits per pixel
Returns
Returns the status of the change. 0 - Change was successful 1 - Change was not successful
Side Effects
none
5.2.2.7.23.6 SetPaletteFlash Function
C
BYTE SetPaletteFlash(
PALETTE_ENTRY * pPaletteEntry,
uint16_t startEntry,
uint16_t length
);
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Description
Loads the palettes from the flash immediately.
Preconditions
Palette must be initialized by PaletteInit().
Parameters
Parameters Description
pPaletteEntry Pointer to the palette table in ROM
startEntry Start entry to load (inclusive)
length Number of entries
Returns
Returns the status of the palette set. 0 - Set was successful 1 - Set was not successful
Side Effects
There may be a slight flicker when the Palette entries are getting loaded one by one.
5.2.2.7.24 Style Scheme Functions
5.2.2.7.24.1 GFX_GOL_SchemeAlphaPrecentSet Function
C
inline void GFX_GOL_SchemeAlphaPrecentSet(
GFX_GOL_OBJ_SCHEME * pScheme,
uint16_t percent
);
Description
This is function GFX_GOL_SchemeAlphaPrecentSet.
5.2.2.7.24.2 GFX_GOL_SchemeBackgroundColorGet Function
C
inline GFX_COLOR GFX_GOL_SchemeBackgroundColorGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeBackgroundColorGet.
5.2.2.7.24.3 GFX_GOL_SchemeBackgroundColorSet Function
C
inline void GFX_GOL_SchemeBackgroundColorSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR color
);
Description
This is function GFX_GOL_SchemeBackgroundColorSet.
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5.2.2.7.24.4 GFX_GOL_SchemeBackgroundImageSet Function
C
inline void GFX_GOL_SchemeBackgroundImageSet(
GFX_GOL_OBJ_SCHEME * pScheme,
uint16_t left,
uint16_t top,
GFX_RESOURCE_HDR * image
);
Description
This is function GFX_GOL_SchemeBackgroundImageSet.
5.2.2.7.24.5 GFX_GOL_SchemeBackgroundTypeGet Function
C
inline GFX_BACKGROUND_TYPE GFX_GOL_SchemeBackgroundTypeGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeBackgroundTypeGet.
5.2.2.7.24.6 GFX_GOL_SchemeBackgroundTypeSet Function
C
inline void GFX_GOL_SchemeBackgroundTypeSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_BACKGROUND_TYPE type
);
Description
This is function GFX_GOL_SchemeBackgroundTypeSet.
5.2.2.7.24.7 GFX_GOL_SchemeColor0Get Function
C
inline GFX_COLOR GFX_GOL_SchemeColor0Get(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeColor0Get.
5.2.2.7.24.8 GFX_GOL_SchemeColor0Set Function
C
inline void GFX_GOL_SchemeColor0Set(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR color
);
Description
This is function GFX_GOL_SchemeColor0Set.
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5.2.2.7.24.9 GFX_GOL_SchemeColor1Get Function
C
inline GFX_COLOR GFX_GOL_SchemeColor1Get(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeColor1Get.
5.2.2.7.24.10 GFX_GOL_SchemeColor1Set Function
C
inline void GFX_GOL_SchemeColor1Set(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR color
);
Description
This is function GFX_GOL_SchemeColor1Set.
5.2.2.7.24.11 GFX_GOL_SchemeColorDisabledGet Function
C
inline GFX_COLOR GFX_GOL_SchemeColorDisabledGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeColorDisabledGet.
5.2.2.7.24.12 GFX_GOL_SchemeColorDisabledSet Function
C
inline void GFX_GOL_SchemeColorDisabledSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR disableColor
);
Description
This is function GFX_GOL_SchemeColorDisabledSet.
5.2.2.7.24.13 GFX_GOL_SchemeColorSet Function
C
inline void GFX_GOL_SchemeColorSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR color0,
GFX_COLOR color1,
GFX_COLOR disableColor
);
Description
This is function GFX_GOL_SchemeColorSet.
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5.2.2.7.24.14 GFX_GOL_SchemeEmbossDarkColorGet Function
C
inline GFX_COLOR GFX_GOL_SchemeEmbossDarkColorGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeEmbossDarkColorGet.
5.2.2.7.24.15 GFX_GOL_SchemeEmbossDarkColorSet Function
C
inline void GFX_GOL_SchemeEmbossDarkColorSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR darkColor
);
Description
This is function GFX_GOL_SchemeEmbossDarkColorSet.
5.2.2.7.24.16 GFX_GOL_SchemeEmbossLightColorGet Function
C
inline GFX_COLOR GFX_GOL_SchemeEmbossLightColorGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeEmbossLightColorGet.
5.2.2.7.24.17 GFX_GOL_SchemeEmbossLightColorSet Function
C
inline void GFX_GOL_SchemeEmbossLightColorSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR lightColor
);
Description
This is function GFX_GOL_SchemeEmbossLightColorSet.
5.2.2.7.24.18 GFX_GOL_SchemeEmbossSet Function
C
inline void GFX_GOL_SchemeEmbossSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR darkColor,
GFX_COLOR lightColor,
uint16_t size
);
Description
This is function GFX_GOL_SchemeEmbossSet.
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5.2.2.7.24.19 GFX_GOL_SchemeEmbossSizeGet Function
C
inline uint16_t GFX_GOL_SchemeEmbossSizeGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeEmbossSizeGet.
5.2.2.7.24.20 GFX_GOL_SchemeEmbossSizeSet Function
C
inline void GFX_GOL_SchemeEmbossSizeSet(
GFX_GOL_OBJ_SCHEME * pScheme,
uint16_t size
);
Description
This is function GFX_GOL_SchemeEmbossSizeSet.
5.2.2.7.24.21 GFX_GOL_SchemeFillStyleGet Function
C
inline GFX_FILL_STYLE GFX_GOL_SchemeFillStyleGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeFillStyleGet.
5.2.2.7.24.22 GFX_GOL_SchemeFillStyleSet Function
C
inline void GFX_GOL_SchemeFillStyleSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_FILL_STYLE style
);
Description
This is function GFX_GOL_SchemeFillStyleSet.
5.2.2.7.24.23 GFX_GOL_SchemeFontGet Function
C
inline GFX_RESOURCE_HDR* GFX_GOL_SchemeFontGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeFontGet.
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5.2.2.7.24.24 GFX_GOL_SchemeFontSet Function
C
inline void GFX_GOL_SchemeFontSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_RESOURCE_HDR * font
);
Description
This is function GFX_GOL_SchemeFontSet.
5.2.2.7.24.25 GFX_GOL_SchemeGradientColorSet Function
C
inline void GFX_GOL_SchemeGradientColorSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR startColor,
GFX_COLOR endColor
);
Description
This is function GFX_GOL_SchemeGradientColorSet.
5.2.2.7.24.26 GFX_GOL_SchemeGradientEndColorGet Function
C
inline GFX_COLOR GFX_GOL_SchemeGradientEndColorGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeGradientEndColorGet.
5.2.2.7.24.27 GFX_GOL_SchemeGradientEndColorSet Function
C
inline void GFX_GOL_SchemeGradientEndColorSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR endColor
);
Description
This is function GFX_GOL_SchemeGradientEndColorSet.
5.2.2.7.24.28 GFX_GOL_SchemeGradientStartColorGet Function
C
inline GFX_COLOR GFX_GOL_SchemeGradientStartColorGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeGradientStartColorGet.
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5.2.2.7.24.29 GFX_GOL_SchemeGradientStartColorSet Function
C
inline void GFX_GOL_SchemeGradientStartColorSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR startColor
);
Description
This is function GFX_GOL_SchemeGradientStartColorSet.
5.2.2.7.24.30 GFX_GOL_SchemeTextColor0Get Function
C
inline GFX_COLOR GFX_GOL_SchemeTextColor0Get(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeTextColor0Get.
5.2.2.7.24.31 GFX_GOL_SchemeTextColor0Set Function
C
inline void GFX_GOL_SchemeTextColor0Set(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR textColor
);
Description
This is function GFX_GOL_SchemeTextColor0Set.
5.2.2.7.24.32 GFX_GOL_SchemeTextColor1Get Function
C
inline GFX_COLOR GFX_GOL_SchemeTextColor1Get(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeTextColor1Get.
5.2.2.7.24.33 GFX_GOL_SchemeTextColor1Set Function
C
inline void GFX_GOL_SchemeTextColor1Set(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR textColor
);
Description
This is function GFX_GOL_SchemeTextColor1Set.
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5.2.2.7.24.34 GFX_GOL_SchemeTextColorDisableGet Function
C
inline GFX_COLOR GFX_GOL_SchemeTextColorDisableGet(
GFX_GOL_OBJ_SCHEME * pScheme
);
Description
This is function GFX_GOL_SchemeTextColorDisableGet.
5.2.2.7.24.35 GFX_GOL_SchemeTextColorDisableSet Function
C
inline void GFX_GOL_SchemeTextColorDisableSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR disableColor
);
Description
This is function GFX_GOL_SchemeTextColorDisableSet.
5.2.2.7.24.36 GFX_GOL_SchemeTextColorSet Function
C
inline void GFX_GOL_SchemeTextColorSet(
GFX_GOL_OBJ_SCHEME * pScheme,
GFX_COLOR textColor0,
GFX_COLOR textColor1,
GFX_COLOR disableColor
);
Description
This is function GFX_GOL_SchemeTextColorSet.
5.2.2.7.25 Global Variables
5.2.2.7.25.1 IMG_bAlignCenter Variable
C
uint8_t IMG_bAlignCenter;
Description
This is variable IMG_bAlignCenter.
5.2.2.7.25.2 IMG_bDownScalingFactor Variable
C
uint8_t IMG_bDownScalingFactor;
Description
This is variable IMG_bDownScalingFactor.
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5.2.2.7.25.3 IMG_blAbortImageDecoding Variable
C
uint8_t IMG_blAbortImageDecoding;
Description
The global variables which define the image position and size
5.2.2.7.25.4 IMG_pCurrentFile Variable
C
IMG_FILE * IMG_pCurrentFile;
Description
This is variable IMG_pCurrentFile.
5.2.2.7.25.5 IMG_pFileAPIs Variable
C
IMG_FILE_SYSTEM_API * IMG_pFileAPIs;
Description
This is variable IMG_pFileAPIs.
5.2.2.7.25.6 IMG_PixelXYColor Variable
C
IMG_PIXEL_XY_RGB_888 IMG_PixelXYColor;
Description
This is variable IMG_PixelXYColor.
5.2.2.7.25.7 IMG_pLoopCallbackFn Variable
C
IMG_LOOP_CALLBACK IMG_pLoopCallbackFn;
Description
This is variable IMG_pLoopCallbackFn.
5.2.2.7.25.8 IMG_pPixelOutput Variable
C
IMG_PIXEL_OUTPUT IMG_pPixelOutput;
Description
This is variable IMG_pPixelOutput.
5.2.2.7.25.9 IMG_wHeight Variable
C
uint16_t IMG_wHeight;
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Description
This is variable IMG_wHeight.
5.2.2.7.25.10 IMG_wImageHeight Variable
C
uint16_t IMG_wImageHeight;
Description
This is variable IMG_wImageHeight.
5.2.2.7.25.11 IMG_wImageWidth Variable
C
uint16_t IMG_wImageWidth;
Description
This is variable IMG_wImageWidth.
5.2.2.7.25.12 IMG_wStartX Variable
C
uint16_t IMG_wStartX;
Description
This is variable IMG_wStartX.
5.2.2.7.25.13 IMG_wStartY Variable
C
uint16_t IMG_wStartY;
Description
This is variable IMG_wStartY.
5.2.2.7.25.14 IMG_wWidth Variable
C
uint16_t IMG_wWidth;
Description
This is variable IMG_wWidth.
5.2.2.7.25.15 DisplayUpdatePending Variable
C
volatile uint8_t DisplayUpdatePending;
Description
This is variable DisplayUpdatePending.
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5.2.2.7.25.16 doubleBuffEnabled Variable
C
uint8_t doubleBuffEnabled;
Description
This is variable doubleBuffEnabled.
5.2.2.7.25.17 GFX_Primitive_instance Variable
C
GFX_Primitive_DATA GFX_Primitive_instance;
Description
structure to store the primitive driver structures
5.2.2.7.25.18 primitiveTaskImage Variable
C
PUTIMAGE_PARAM primitiveTaskImage;
Description
This is variable primitiveTaskImage.
5.2.2.7.26 Data Types and Constants
5.2.2.7.26.1 CHARTPARAM Structure
C
typedef struct {
XCHAR * pTitle;
XCHAR * pSmplLabel;
XCHAR * pValLabel;
short seriesCount;
uint16_t smplStart;
uint16_t smplEnd;
uint16_t valMax;
uint16_t valMin;
uint16_t perMax;
uint16_t perMin;
GFX_COLOR * pColor;
void * pTitleFont;
void * pAxisLabelsFont;
void * pGridLabelsFont;
} CHARTPARAM;
Description
Defines the parameters for the CHART object.
Members
Members Description
XCHAR * pTitle; Pointer to the Title of the chart.
XCHAR * pSmplLabel; Pointer to the bar chart sample axis label. Depending
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XCHAR * pValLabel; Pointer to the bar chart value axis label. Depending
short seriesCount; Number of data series that will be displayed when chart is drawn.
uint16_t smplStart; Start point of data sample range to be displayed (minimum/default value = 1)
uint16_t smplEnd; End point of data sample range to be displayed.
uint16_t valMax; Maximum value of a sample that can be displayed.
uint16_t valMin; Minimum value of a sample that can be displayed.
uint16_t perMax; Maximum value of the percentage range that can be displayed.
uint16_t perMin; Minimum value of the percentage range that can be displayed.
GFX_COLOR * pColor; Pointer to the color table used to draw the chart data.
void * pTitleFont; Pointer to the font used for the title label of the chart.
void * pAxisLabelsFont; Pointer to the font used for X and Y axis labels.
void * pGridLabelsFont; Pointer to the font used for X and Y axis grid labels.
5.2.2.7.26.2 DATASERIES Structure
C
typedef struct {
XCHAR * pSData;
uint16_t samples;
BYTE show;
uint16_t * pData;
void * pNextData;
} DATASERIES;
Description
Defines a variable for the CHART object. It specifies the number of samples, pointer to the array of samples for the data series
and pointer to the next data series. A member of this structure (show) is used as a flag to determine if the series is to be drawn
or not. Together with the smplStart and smplEnd it will determine what kind of chart will be drawn.
Members
Members Description
XCHAR * pSData; Pointer to the data series name.
uint16_t samples; Indicates the number of data samples (or data points) contained in the array
specified by pData.
BYTE show; The flag to indicate if the data series will be shown or not. If this flag is set to
SHOW_DATA, the data series will be shown. If HIDE_DATA, the data series will
not be shown.
uint16_t * pData; Pointer to the array of data samples.
void * pNextData; Pointer to the next data series. NULL if no other data series follows.
5.2.2.7.26.3 FileFeof Type
C
typedef bool (* FileFeof)(void *stream);
Description
This is type FileFeof.
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5.2.2.7.26.4 FileRead Type
C
typedef size_t (* FileRead)(void *ptr, size_t size, size_t n, void *stream);
Description
Typedefs of the used File System APIs
5.2.2.7.26.5 FileSeek Type
C
typedef bool (* FileSeek)(void *stream, long offset, int whence);
Description
This is type FileSeek.
5.2.2.7.26.6 FileTell Type
C
typedef long (* FileTell)(void *fo);
Description
This is type FileTell.
5.2.2.7.26.7 FONT_ORIENTATION Enumeration
C
typedef enum {
ORIENT_HOR = 0,
ORIENT_VER = 1
} FONT_ORIENTATION;
Description
GFX font orientation
Remarks
None.
5.2.2.7.26.8 GFX_ALIGNMENT Enumeration
C
typedef enum {
GFX_ALIGN_LEFT = 0x0C01,
GFX_ALIGN_HCENTER = 0x0C02,
GFX_ALIGN_RIGHT = 0x0C04,
GFX_ALIGN_TOP = 0x0C10,
GFX_ALIGN_VCENTER = 0x0C20,
GFX_ALIGN_BOTTOM = 0x0C40,
GFX_ALIGN_CENTER = 0x0C22,
GFX_ALIGN_HORIZONTAL_MASK = 0x0C07,
GFX_ALIGN_VERTICAL_MASK = 0x0C70
} GFX_ALIGNMENT;
Description
Defines the types of text alignment. The text alignment is used in GFX_TextStringBoxDraw().
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Members
Members Description
GFX_ALIGN_LEFT = 0x0C01 left aligned text
GFX_ALIGN_HCENTER = 0x0C02 horizontal center aligned text
GFX_ALIGN_RIGHT = 0x0C04 right aligned text
GFX_ALIGN_TOP = 0x0C10 top aligned text
GFX_ALIGN_VCENTER = 0x0C20 vertical center aligned text
GFX_ALIGN_BOTTOM = 0x0C40 bottom aligned text
GFX_ALIGN_CENTER = 0x0C22 vertical & horizontal center aligned text
GFX_ALIGN_HORIZONTAL_MASK =
0x0C07
horizontal mask, DO NOT document this item
GFX_ALIGN_VERTICAL_MASK = 0x0C70 vertical mask, DO NOT document this item DOM-IGNORE-END
5.2.2.7.26.9 GFX_BACKGROUND Structure
C
typedef struct {
uint16_t left;
uint16_t top;
GFX_BACKGROUND_TYPE type;
GFX_RESOURCE_HDR * pImage;
GFX_COLOR color;
} GFX_BACKGROUND;
Description
Structure describing the background information. Useful in refreshing the whole screen or an area of the screen. The background
information, when used, can be one of the enumerated types in GFX_BACKGROUND_TYPE.
• pBackGroundImage - pointer to a GFX_RESOURCE_HEADER with the type GFX_RESOURCE_TYPE_MCHP_MBITMAP.
• backGroundColor - value of the background color used when pBackgroundImage is NULL.
The pBackGroundImage has the high priority and will assume an image is used as a background when the pointer is initialized. If
this is NULL the backgroundColor is assumed to be the background.
Members
Members Description
uint16_t left; Horizontal starting position of the background.
uint16_t top; Horizontal starting position of the background.
GFX_BACKGROUND_TYPE type; Specifies the type of background to use.
GFX_RESOURCE_HDR * pImage; Pointer to the background image used. Set this to NULL if not used.
GFX_COLOR color; If the background image is NULL, background is assumed to be this color.
5.2.2.7.26.10 GFX_BACKGROUND_TYPE Enumeration
C
typedef enum {
GFX_BACKGROUND_NONE = 0x00,
GFX_BACKGROUND_COLOR = 0x01,
GFX_BACKGROUND_IMAGE = 0x02,
GFX_BACKGROUND_DISPLAY_BUFFER = 0x03
} GFX_BACKGROUND_TYPE;
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Description
Defines the types of background information. Knowing the background information allows easier refresh of an area on the
display buffer.
Members
Members Description
GFX_BACKGROUND_NONE = 0x00 No background information set.
GFX_BACKGROUND_COLOR = 0x01 Background is set to a color.
GFX_BACKGROUND_IMAGE = 0x02 Background is set to an image.
GFX_BACKGROUND_DISPLAY_BUFFER
= 0x03
Background is set to the current content of the display buffer. This requires
support of GFX_PixelArrayGet().
5.2.2.7.26.11 GFX_BEVEL_RENDER_TYPE Enumeration
C
typedef enum {
GFX_DRAW_FULLBEVEL = 0xFF,
GFX_DRAW_TOPBEVEL = 0xF0,
GFX_DRAW_BOTTOMBEVEL = 0x0F
} GFX_BEVEL_RENDER_TYPE;
Description
Bevel shapes can be rendered in full or half size. The following types defines the full, top and bottom halves.
Members
Members Description
GFX_DRAW_FULLBEVEL = 0xFF render full bevel shape
GFX_DRAW_TOPBEVEL = 0xF0 render top bevel shape
GFX_DRAW_BOTTOMBEVEL = 0x0F render bottom half bevel shape
5.2.2.7.26.12 GFX_COLOR Type
C
typedef uint32_t GFX_COLOR;
Description
Data type that defines the color data. This type is dependent on the COLOR_DEPTH setting. See COLOR_DEPTH.
• GFX_COLOR is type uint8_t if COLOR_DEPTH <= 8
• GFX_COLOR is type uint16_t if COLOR_DEPTH = 16
• GFX_COLOR is type uint32_t if COLOR_DEPTH = 24
5.2.2.7.26.13 GFX_DOUBLE_BUFFERING_MODE Structure
C
typedef struct {
GFX_FEATURE_STATUS gfxDoubleBufferFeature;
GFX_FEATURE_STATUS gfxDoubleBufferRequestSync;
GFX_FEATURE_STATUS gfxDoubleBufferFullSync;
GFX_RECTANGULAR_AREA gfxDoubleBufferAreas[GFX_MAX_INVALIDATE_AREAS];
uint16_t gfxUnsyncedAreaCount;
} GFX_DOUBLE_BUFFERING_MODE;
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Description
Structure used to manage double buffering feature.
5.2.2.7.26.14 GFX_FEATURE_STATUS Enumeration
C
typedef enum {
GFX_FEATURE_ENABLED = 1,
GFX_FEATURE_DISABLED = 0
} GFX_FEATURE_STATUS;
Description
Defines the states of a Graphics Library feature that can nbe enabled/disabled at run time.
5.2.2.7.26.15 GFX_FILL_STYLE Enumeration
C
typedef enum {
GFX_FILL_STYLE_NONE = 0x0B00,
GFX_FILL_STYLE_COLOR,
GFX_FILL_STYLE_ALPHA_COLOR,
GFX_FILL_STYLE_GRADIENT_DOWN,
GFX_FILL_STYLE_GRADIENT_UP,
GFX_FILL_STYLE_GRADIENT_RIGHT,
GFX_FILL_STYLE_GRADIENT_LEFT,
GFX_FILL_STYLE_GRADIENT_DOUBLE_VER,
GFX_FILL_STYLE_GRADIENT_DOUBLE_HOR
} GFX_FILL_STYLE;
Description
Defines the types of fill styles.
Members
Members Description
GFX_FILL_STYLE_NONE = 0x0B00 no fill
GFX_FILL_STYLE_COLOR color fill
GFX_FILL_STYLE_ALPHA_COLOR color fill with alpha blending
GFX_FILL_STYLE_GRADIENT_DOWN gradient, vertical-down direction
GFX_FILL_STYLE_GRADIENT_UP gradient, vertical-up direction
GFX_FILL_STYLE_GRADIENT_RIGHT gradient, horizontal-right direction
GFX_FILL_STYLE_GRADIENT_LEFT gradient, horizontal-left direction
GFX_FILL_STYLE_GRADIENT_DOUBLE_VER gradient, vertical-up/down direction
GFX_FILL_STYLE_GRADIENT_DOUBLE_HOR gradient, horizontal-left/right direction
5.2.2.7.26.16 GFX_FONT_ANTIALIAS_TYPE Enumeration
C
typedef enum {
GFX_FONT_ANTIALIAS_OPAQUE = 0,
GFX_FONT_ANTIALIAS_TRANSLUCENT = 1
} GFX_FONT_ANTIALIAS_TYPE;
Description
Transparency type when rendering characters with anti-aliasing.
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Members
Members Description
GFX_FONT_ANTIALIAS_OPAQUE = 0 Mid colors are calculated only once while rendering each character. This is ideal
for rendering text over a constant background.
GFX_FONT_ANTIALIAS_TRANSLUCENT
= 1
Mid colors are calculated for every necessary pixel. This feature is useful when
rendering text over an image or when the background is not one flat color.
5.2.2.7.26.17 GFX_FONT_CURRENT Structure
C
typedef struct {
GFX_RESOURCE_HDR * pFont;
GFX_FONT_HEADER header;
GFX_ALIGNMENT alignment;
FONT_ORIENTATION orientation;
uint8_t antiAliasType;
} GFX_FONT_CURRENT;
Description
GFX current font
Members
Members Description
GFX_RESOURCE_HDR * pFont; pointer to the currently set font
GFX_FONT_HEADER header; copy of the currently set font header
GFX_ALIGNMENT alignment; alignment of the font
FONT_ORIENTATION orientation; orientation of the font
uint8_t antiAliasType; anti-alias type set
Remarks
None.
5.2.2.7.26.18 GFX_FONT_GLYPH_ENTRY Structure
C
typedef struct {
uint8_t width;
uint8_t offsetLSB;
uint16_t offsetMSB;
} GFX_FONT_GLYPH_ENTRY;
Description
Structures describing the glyph entry.
Members
Members Description
uint8_t width; width of the glyph
uint8_t offsetLSB; Least Significant uint8_t of the glyph location offset
uint16_t offsetMSB; Most Significant (2) uint8_ts of the glyph location offset
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5.2.2.7.26.19 GFX_FONT_GLYPH_ENTRY_EXTENDED Structure
C
typedef struct {
uint32_t offset;
uint16_t cursorAdvance;
uint16_t glyphWidth;
int16_t xAdjust;
int16_t yAdjust;
} GFX_FONT_GLYPH_ENTRY_EXTENDED;
Description
This is type GFX_FONT_GLYPH_ENTRY_EXTENDED.
Members
Members Description
uint32_t offset; Offset Order: LSW_LSB LSW_MSB MSW_MSB MSW_MSB
uint16_t cursorAdvance; x-value by which cursor has to advance after rendering the glyph
uint16_t glyphWidth; width of the glyph
int16_t xAdjust; x-position is adjusted as per this signed number
int16_t yAdjust; y-position is adjusted as per this signed number
5.2.2.7.26.20 GFX_FONT_HEADER Structure
C
typedef struct {
uint8_t fontID;
uint8_t extendedGlyphEntry : 1;
uint8_t res1 : 1;
uint8_t bpp : 2;
uint8_t orientation : 2;
uint8_t res2 : 2;
uint16_t firstChar;
uint16_t lastChar;
uint16_t height;
} GFX_FONT_HEADER;
Description
Structure describing the font header.
Members
Members Description
uint8_t fontID; User assigned value
uint8_t extendedGlyphEntry : 1; Extended Glyph entry flag. When set font has extended glyph feature enabled.
uint8_t res1 : 1; Reserved for future use (must be set to 0)
5.2.2.7.26.21 GFX_FONT_OUTCHAR Structure
C
typedef struct {
GFX_FONT_SPACE GFX_FONT_GLYPH_ENTRY * pChTable;
GFX_FONT_SPACE GFX_FONT_GLYPH_ENTRY_EXTENDED * pChTableExtended;
uint8_t chImage[GFX_EXTERNAL_FONT_RASTER_BUFFER_SIZE];
int16_t chEffectiveGlyphWidth;
uint8_t bpp;
int16_t chGlyphWidth;
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GFX_FONT_SPACE uint8_t * pChImage;
int16_t xAdjust;
int16_t yAdjust;
int16_t xWidthAdjust;
int16_t heightOvershoot;
} GFX_FONT_OUTCHAR;
Description
Structure for character information when rendering the character.
5.2.2.7.26.22 GFX_GOL_ANALOGCLOCK Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
short radius;
short centerx;
short centery;
short valueS;
short prev_valueS;
short valueM;
short prev_valueM;
short valueH;
short prev_valueH;
void * pBitmap;
} GFX_GOL_ANALOGCLOCK;
Description
Defines the parameters required for a clock Object. The following relationships of the parameters determines the general shape
of the clock:
1. centerx and centery determine the middle of the clock.
2. radius defines the radius of the clock.
4. *pBitmap points to the background image for the analog clock.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_OBJ_HEADER).
short radius; Radius of the clock.
short centerx; center location in X-axis.
short centery; center location in Y-axis.
short valueS; time in Second
short prev_valueS; previous time in Second
short valueM; time in Minute
short prev_valueM; previous time in Minute
short valueH; time in Hour
short prev_valueH; previous time in Hour
void * pBitmap; Pointer to bitmap used.
5.2.2.7.26.23 GFX_GOL_BUTTON Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
uint16_t radius;
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uint16_t textWidth;
uint16_t textHeight;
GFX_XCHAR * pText;
GFX_ALIGNMENT alignment;
GFX_RESOURCE_HDR * pPressImage;
GFX_RESOURCE_HDR * pReleaseImage;
GFX_COLOR previousAlphaColor;
} GFX_GOL_BUTTON;
Description
Defines the parameters required for a GFX_GOL_BUTTON Object. The following relationships of the parameters determines the
general shape of the GFX_GOL_BUTTON:
1. Width is determined by right - left.
2. Height is determined by top - bottom.
3. Radius - specifies if the GFX_GOL_BUTTON will have a rounded edge. If zero then the GFX_GOL_BUTTON will have sharp
(cornered) edge.
4. If 2*radius = height = width, the GFX_GOL_BUTTON is a circular GFX_GOL_BUTTON.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_GOL_OBJ_HEADER).
uint16_t radius; Radius for rounded buttons.
uint16_t textWidth; Computed text width, done at creation.
uint16_t textHeight; Computed text height, done at creation.
GFX_XCHAR * pText; Pointer to the text used.
GFX_ALIGNMENT alignment; text alignment
GFX_RESOURCE_HDR * pPressImage; Pointer to bitmap used.
GFX_RESOURCE_HDR * pReleaseImage; Pointer to bitmap used.
5.2.2.7.26.24 GFX_GOL_BUTTON_STATE Enumeration
C
typedef enum {
GFX_GOL_BUTTON_FOCUSED_STATE = 0x0001,
GFX_GOL_BUTTON_DISABLED_STATE = 0x0002,
GFX_GOL_BUTTON_PRESSED_STATE = 0x0004,
GFX_GOL_BUTTON_TOGGLE_STATE = 0x0008,
GFX_GOL_BUTTON_TWOTONE_STATE = 0x0100,
GFX_GOL_BUTTON_NOPANEL_STATE = 0x0200,
GFX_GOL_BUTTON_DRAW_FOCUS_STATE = 0x2000,
GFX_GOL_BUTTON_DRAW_STATE = 0x4000,
GFX_GOL_BUTTON_HIDE_STATE = 0x8000
} GFX_GOL_BUTTON_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_BUTTON_FOCUSED_STATE =
0x0001
Bit for focus state.
GFX_GOL_BUTTON_DISABLED_STATE =
0x0002
Bit for disabled state.
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GFX_GOL_BUTTON_PRESSED_STATE =
0x0004
Bit for press state.
GFX_GOL_BUTTON_TOGGLE_STATE =
0x0008
Bit to indicate object will have a toggle behavior.
GFX_GOL_BUTTON_TWOTONE_STATE =
0x0100
Bit to indicate the object is a two tone type.
GFX_GOL_BUTTON_NOPANEL_STATE =
0x0200
Bit to indicate the object will be drawn without a panel (for faster drawing when
the object image used is larger than the object's panel).
GFX_GOL_BUTTON_DRAW_FOCUS_STATE
= 0x2000
Bit to indicate focus must be redrawn.
GFX_GOL_BUTTON_DRAW_STATE =
0x4000
Bit to indicate object must be redrawn.
GFX_GOL_BUTTON_HIDE_STATE = 0x8000 Bit to indicate object must be removed from screen.
5.2.2.7.26.25 GFX_GOL_CHART Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
CHARTPARAM prm;
DATASERIES * pChData;
} GFX_GOL_CHART;
Description
Defines the parameters required for a chart Object.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_OBJ_HEADER).
CHARTPARAM prm; Structure for the parameters of the chart.
DATASERIES * pChData; Pointer to the first chart data series in the link list of data series.
5.2.2.7.26.26 GFX_GOL_CHECKBOX Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
uint16_t textHeight;
GFX_XCHAR * pText;
GFX_ALIGNMENT alignment;
} GFX_GOL_CHECKBOX;
Description
The structure contains check box data
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_GOL_OBJ_HEADER).
uint16_t textHeight; Pre-computed text height
GFX_XCHAR * pText; Pointer to text
GFX_ALIGNMENT alignment; text alignment
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5.2.2.7.26.27 GFX_GOL_CHECKBOX_STATE Enumeration
C
typedef enum {
GFX_GOL_CHECKBOX_FOCUSED_STATE = 0x0001,
GFX_GOL_CHECKBOX_DISABLED_STATE = 0x0002,
GFX_GOL_CHECKBOX_CHECKED_STATE = 0x0004,
GFX_GOL_CHECKBOX_DRAW_CHECK_STATE = 0x1000,
GFX_GOL_CHECKBOX_DRAW_FOCUS_STATE = 0x2000,
GFX_GOL_CHECKBOX_DRAW_STATE = 0x4000,
GFX_GOL_CHECKBOX_HIDE_STATE = 0x8000
} GFX_GOL_CHECKBOX_STATE;
Description
• Object States Definition:
******************************************************************
#define GFX_GOL_CHECKBOX_FOCUSED_STATE 0x0001 // Focus state #define
GFX_GOL_CHECKBOX_DISABLED_STATE 0x0002 // Disabled state #define GFX_GOL_CHECKBOX_CHECKED_STATE
0x0004 // Checked state #define GFX_GOL_CHECKBOX_HIDE_STATE 0x8000 // Check box must be removed from screen
#define GFX_GOL_CHECKBOX_DRAW_FOCUS_STATE 0x2000 // Focus must be redrawn #define
GFX_GOL_CHECKBOX_DRAW_STATE 0x4000 // Whole check box must be redrawn #define
GFX_GOL_CHECKBOX_DRAW_CHECK_STATE 0x1000 // Check box mark should be redrawn
Members
Members Description
GFX_GOL_CHECKBOX_FOCUSED_STATE =
0x0001
Bit for focus state.
GFX_GOL_CHECKBOX_DISABLED_STATE =
0x0002
Bit to indicate object is disabled
GFX_GOL_CHECKBOX_CHECKED_STATE =
0x0004
Bit to indicate object is checked
GFX_GOL_CHECKBOX_DRAW_CHECK_STATE
= 0x1000
Bit to indicate the check must be redrawn.
GFX_GOL_CHECKBOX_DRAW_FOCUS_STATE
= 0x2000
Bit to indicate focus must be redrawn.
GFX_GOL_CHECKBOX_DRAW_STATE =
0x4000
Bit to indicate object must be redrawn.
GFX_GOL_CHECKBOX_HIDE_STATE = 0x8000 Bit to indicate object must be removed from screen.
5.2.2.7.26.28 GFX_GOL_CUSTOMCONTROL Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
uint8_t instance;
uint16_t ID;
void * pNxtObj;
GFX_GOL_OBJ_TYPE type;
uint16_t state;
uint16_t left;
uint16_t top;
uint16_t right;
uint16_t bottom;
GFX_GOL_OBJ_SCHEME * pGolScheme;
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DRAW_FUNC draw;
FREE_FUNC FreeObj;
ACTIONGET_FUNC actionGet;
ACTIONSET_FUNC actionSet;
uint16_t pos;
uint16_t prevPos;
} GFX_GOL_CUSTOMCONTROL;
Description
The structure contains data for the control
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_OBJ_HEADER).
uint16_t ID; instance unique ID
void * pNxtObj; a pointer to the next object in the linked list
GFX_GOL_OBJ_TYPE type; must be set to OBJ_CUSTOM
uint16_t state; state
uint16_t left; left border
uint16_t top; top border
uint16_t right; right border
uint16_t bottom; bottom border
GFX_GOL_OBJ_SCHEME * pGolScheme; the style scheme used
FREE_FUNC FreeObj; function pointer to the object free function
ACTIONGET_FUNC actionGet; function pointer to the object message function
ACTIONSET_FUNC actionSet; function pointer to the object default message function
uint16_t pos; current position
uint16_t prevPos; previous position
5.2.2.7.26.29 GFX_GOL_DIGITALMETER Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
uint16_t textHeight;
uint32_t Cvalue;
uint32_t Pvalue;
uint8_t NoOfDigits;
uint8_t DotPos;
GFX_ALIGNMENT alignment;
} GFX_GOL_DIGITALMETER;
Description
Digital meter parameters
DigitalMeter properties.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_OBJ_HEADER).
uint16_t textHeight; Pre-computed text height
uint32_t Cvalue; Current value
uint32_t Pvalue; Previous value
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uint8_t NoOfDigits; Number of digits to be displayed
uint8_t DotPos; Position of decimal point
GFX_ALIGNMENT alignment; text alignment
Remarks
None.
5.2.2.7.26.30 GFX_GOL_DIGITALMETER_STATE Enumeration
C
typedef enum {
GFX_GOL_DIGITALMETER_DISABLED_STATE = 0x0002,
GFX_GOL_DIGITALMETER_FRAME_STATE = 0x0010,
GFX_GOL_DIGITALMETER_DRAW_STATE = 0x4000,
GFX_GOL_DIGITALMETER_UPDATE_STATE = 0x2000,
GFX_GOL_DIGITALMETER_HIDE_STATE = 0x8000
} GFX_GOL_DIGITALMETER_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_DIGITALMETER_DISABLED_STATE
= 0x0002
Bit for disabled state.
GFX_GOL_DIGITALMETER_FRAME_STATE =
0x0010
Bit to indicate frame is displayed.
GFX_GOL_DIGITALMETER_DRAW_STATE =
0x4000
Bit to indicate object must be redrawn.
GFX_GOL_DIGITALMETER_UPDATE_STATE =
0x2000
Bit to indicate that only text must be redrawn.
GFX_GOL_DIGITALMETER_HIDE_STATE =
0x8000
Bit to remove object from screen.
5.2.2.7.26.31 GFX_GOL_DRAW_CALLBACK_FUNC Type
C
typedef bool (* GFX_GOL_DRAW_CALLBACK_FUNC)(void);
Description
This callback function is implemented by the application. This is called inside the GFX_GOL_ObjectListDraw() function when the
drawing of objects in the active list is completed.
Any application specific rendering must be performed on this callback function so no object rendering will be affected by the
application calls to primitive rendering functions. Application setting the drawing color, line style, fill style, text string cursor
position and current font will not affect the object rendering. This is also the safe place to modify the active list.
When the application has performed its own primitive rendering calls, this function must return true to inform the
GFX_GOL_ObjectListDraw() that it is done rendering and checking for object drawing or redrawing can continue.
Preconditions
None.
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Returns
true - is returned when application rendering is done. false - is returned when application rendering is not yet finished.
Example
None.
5.2.2.7.26.32 GFX_GOL_EDITBOX Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
uint16_t textHeight;
GFX_XCHAR * pText;
GFX_ALIGNMENT alignment;
uint16_t charMax;
uint16_t length;
} GFX_GOL_EDITBOX;
Description
Defines the parameters required for a Edit Box Object.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_GOL_OBJ_HEADER).
uint16_t textHeight; Pre-computed text height.
GFX_XCHAR * pText; Pointer to text buffer.
GFX_ALIGNMENT alignment; text alignment
uint16_t charMax; Maximum number of characters in the edit box.
uint16_t length; Current text length.
5.2.2.7.26.33 GFX_GOL_GROUPBOX Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
uint16_t textWidth;
uint16_t textHeight;
GFX_XCHAR * pText;
GFX_ALIGNMENT alignment;
} GFX_GOL_GROUPBOX;
Description
Defines the parameters required for a group box Object. The textwidth and textHeight is not checked with the actual dimension
of the object. Clipping is not supported in group box object. It is possible for the text to exceed the dimension of the Object.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_OBJ_HEADER).
uint16_t textWidth; Pre-computed text width.
uint16_t textHeight; Pre-computed text height.
GFX_XCHAR * pText; Text string used.
GFX_ALIGNMENT alignment; text alignment
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5.2.2.7.26.34 GFX_GOL_GROUPBOX_STATE Enumeration
C
typedef enum {
GFX_GOL_GROUPBOX_DISABLED_STATE = 0x0002,
GFX_GOL_GROUPBOX_DRAW_STATE = 0x4000,
GFX_GOL_GROUPBOX_HIDE_STATE = 0x8000
} GFX_GOL_GROUPBOX_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_GROUPBOX_DISABLED_STATE
= 0x0002
Bit for disabled state
GFX_GOL_GROUPBOX_DRAW_STATE =
0x4000
Bit to indicate group box must be redrawn
GFX_GOL_GROUPBOX_HIDE_STATE =
0x8000
Bit to remove object from screen
5.2.2.7.26.35 GFX_GOL_LISTBOX Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
GFX_GOL_LISTITEM * pItemList;
GFX_GOL_LISTITEM * pFocusItem;
uint16_t itemsNumber;
int16_t scrollY;
int16_t textHeight;
GFX_ALIGNMENT alignment;
} GFX_GOL_LISTBOX;
Description
Defines the parameters required for a list box Object.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_GOL_OBJ_HEADER).
GFX_GOL_LISTITEM * pItemList; Pointer to the list of items.
GFX_GOL_LISTITEM * pFocusItem; Pointer to the focused item.
uint16_t itemsNumber; Number of items in the list box.
int16_t scrollY; Scroll displacement for the list.
int16_t textHeight; Pre-computed text height.
GFX_ALIGNMENT alignment; items alignment
5.2.2.7.26.36 GFX_GOL_LISTBOX_ITEM_STATUS Enumeration
C
typedef enum {
GFX_GOL_LISTBOX_ITEM_STATUS_SELECTED = 0x0001,
GFX_GOL_LISTBOX_ITEM_STATUS_REDRAW = 0x0002
} GFX_GOL_LISTBOX_ITEM_STATUS;
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Description
Bit definitions for the status of an item
Members
Members Description
GFX_GOL_LISTBOX_ITEM_STATUS_SELECTED
= 0x0001
define LB_STS_SELECTED 0x0001 // Item is selected.
GFX_GOL_LISTBOX_ITEM_STATUS_REDRAW
= 0x0002
define LB_STS_REDRAW 0x0002 // Item is to be redrawn.
5.2.2.7.26.37 GFX_GOL_LISTBOX_STATE Enumeration
C
typedef enum {
GFX_GOL_LISTBOX_FOCUSED_STATE = 0x0001,
GFX_GOL_LISTBOX_DISABLED_STATE = 0x0002,
GFX_GOL_LISTBOX_SINGLE_SELECT_STATE = 0x0010,
GFX_GOL_LISTBOX_DRAW_ITEMS_STATE = 0x1000,
GFX_GOL_LISTBOX_DRAW_FOCUS_STATE = 0x2000,
GFX_GOL_LISTBOX_DRAW_STATE = 0x4000,
GFX_GOL_LISTBOX_HIDE_STATE = 0x8000
} GFX_GOL_LISTBOX_STATE;
Description
This is type GFX_GOL_LISTBOX_STATE.
Members
Members Description
GFX_GOL_LISTBOX_FOCUSED_STATE =
0x0001
Bit for focus state.
GFX_GOL_LISTBOX_DISABLED_STATE =
0x0002
Bit for disabled state.
GFX_GOL_LISTBOX_SINGLE_SELECT_STATE
= 0x0010
Bit to indicate only one item can be selected.
GFX_GOL_LISTBOX_DRAW_ITEMS_STATE =
0x1000
Bit to indicate selected items of the object must be redrawn.
GFX_GOL_LISTBOX_DRAW_FOCUS_STATE =
0x2000
Bit to indicate focus must be redrawn.
GFX_GOL_LISTBOX_DRAW_STATE = 0x4000 Bit to indicate object must be redrawn.
GFX_GOL_LISTBOX_HIDE_STATE = 0x8000 Bit to indicate object must be removed from screen.
5.2.2.7.26.38 GFX_GOL_LISTITEM Structure
C
typedef struct {
void * pPrevItem;
void * pNextItem;
GFX_GOL_LISTBOX_ITEM_STATUS status;
GFX_XCHAR * pText;
GFX_RESOURCE_HDR * pImage;
uint16_t data;
} GFX_GOL_LISTITEM;
Description
Defines the parameters required for a list item used in list box.
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Members
Members Description
void * pPrevItem; Pointer to the next item
void * pNextItem; Pointer to the next item
GFX_GOL_LISTBOX_ITEM_STATUS
status;
Specifies the status of the item.
GFX_XCHAR * pText; Pointer to the text for the item
GFX_RESOURCE_HDR * pImage; Pointer to the image used
uint16_t data; Some data associated with the item
5.2.2.7.26.39 GFX_GOL_MESSAGE Structure
C
typedef struct {
uint8_t type;
uint8_t uiEvent;
int16_t param1;
int16_t param2;
} GFX_GOL_MESSAGE;
Description
GFX_GOL_MESSAGE
Specifies message structure used in the library.
• The types must be one of the INPUT_DEVICE_TYPE:
• TYPE_UNKNOWN
• TYPE_KEYBOARD
• TYPE_TOUCHSCREEN
• TYPE_MOUSE
• uiEvent must be one of the INPUT_DEVICE_EVENT.
• for touch screen:
• EVENT_INVALID
• EVENT_MOVE
• EVENT_PRESS
• EVENT_STILLPRESS
• EVENT_RELEASE
• for keyboard:
• EVENT_KEYSCAN (param2 contains scan code)
• EVENT_KEYCODE (param2 contains character code)
• param1:
• for touch screen is the x position
• for keyboard ID of object receiving the message
• param2
• for touch screen y position
• for keyboard scan or key code
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Members
Members Description
uint8_t type; Type of input device.
uint8_t uiEvent; The generic events for input device.
int16_t param1; Parameter 1, definition and usage is dependent on the type of input device.
int16_t param2; Parameter 2, definition and usage is dependent on the type of input device.
Remarks
None.
5.2.2.7.26.40 GFX_GOL_METER Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
GFX_XCHAR * pText;
GFX_GOL_METER_DRAW_TYPE type;
int16_t value;
int16_t minValue;
int16_t maxValue;
int16_t xCenter;
int16_t yCenter;
int16_t radius;
int16_t xPos;
int16_t yPos;
GFX_COLOR color1;
GFX_COLOR color2;
GFX_COLOR color3;
GFX_COLOR color4;
GFX_COLOR color5;
GFX_COLOR color6;
GFX_RESOURCE_HDR * pTitleFont;
GFX_RESOURCE_HDR * pValueFont;
} GFX_GOL_METER;
Description
Defines the parameters required for a meter Object. Depending on the type selected the meter is drawn with the defined shape
parameters and values set on the given fields.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see OBJ_HEADER).
GFX_XCHAR * pText; The text label of the meter.
GFX_GOL_METER_DRAW_TYPE type; sets the type of the meter
int16_t value; Current value of the meter.
int16_t minValue; minimum value the meter can display
int16_t maxValue; maximum value the meter can display (range is maxValue - minValue)
int16_t xCenter; The x coordinate center position. This is computed automatically.
int16_t yCenter; The y coordinate center position. This is computed automatically.
int16_t radius; Radius of the meter, also defines the needle length.
int16_t xPos; The current x position of the needle. This is computed automatically.
int16_t yPos; The current y position of the needle. This is computed automatically.
GFX_COLOR color1; Arc1 and scale1 color parameter.
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GFX_COLOR color2; Arc2 and scale2 color parameter
GFX_COLOR color3; Arc3 and scale3 color parameter
GFX_COLOR color4; Arc4 and scale4 color parameter
GFX_COLOR color5; Arc5 and scale5 color parameter
GFX_COLOR color6; Arc6 and scale6 color parameter
GFX_RESOURCE_HDR * pTitleFont; Pointer to the font used in the title of the meter
GFX_RESOURCE_HDR * pValueFont; Pointer to the font used in the current reading (if displayed) of the meter
5.2.2.7.26.41 GFX_GOL_METER_DRAW_TYPE Enumeration
C
typedef enum {
GFX_GOL_METER_WHOLE_TYPE = 0,
GFX_GOL_METER_HALF_TYPE = 1,
GFX_GOL_METER_QUARTER_TYPE = 2
} GFX_GOL_METER_DRAW_TYPE;
Description
• Meter Types Definition: MTR_WHOLE_TYPE will use all the arc colors (color1 to color6) MTR_HALF_TYPE will use arc
colors (color5, color4, color3, color2) MTR_QUARTER_TYPE will use arc colors (color3, color2)
Members
Members Description
GFX_GOL_METER_WHOLE_TYPE = 0 draw circular meter
GFX_GOL_METER_HALF_TYPE = 1 draw semi circle meter
GFX_GOL_METER_QUARTER_TYPE = 2 draw quarter of a circle meter
5.2.2.7.26.42 GFX_GOL_METER_STATE Enumeration
C
typedef enum {
GFX_GOL_METER_DISABLED_STATE = 0x0002,
GFX_GOL_METER_RING_STATE = 0x0004,
GFX_GOL_METER_ACCURACY_STATE = 0x0008,
GFX_GOL_METER_UPDATE_DRAW_STATE = 0x1000,
GFX_GOL_METER_DRAW_STATE = 0x4000,
GFX_GOL_METER_HIDE_STATE = 0x8000
} GFX_GOL_METER_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_METER_DISABLED_STATE =
0x0002
Bit for disabled state.
GFX_GOL_METER_RING_STATE = 0x0004 Bit for press state.
GFX_GOL_METER_ACCURACY_STATE =
0x0008
Bit to indicate object will have a toggle behavior.
GFX_GOL_METER_UPDATE_DRAW_STATE
= 0x1000
Bit to indicate hand update only.
GFX_GOL_METER_DRAW_STATE = 0x4000 Bit to indicate object must be redrawn.
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GFX_GOL_METER_HIDE_STATE = 0x8000 Bit to indicate object must be removed from screen.
5.2.2.7.26.43 GFX_GOL_OBJ_HEADER Structure
C
typedef struct {
uint16_t ID;
void * pNxtObj;
GFX_GOL_OBJ_TYPE type;
uint16_t state;
uint16_t left;
uint16_t top;
uint16_t right;
uint16_t bottom;
GFX_GOL_OBJ_SCHEME * pGolScheme;
DRAW_FUNC DrawObj;
FREE_FUNC FreeObj;
ACTIONGET_FUNC actionGet;
ACTIONSET_FUNC actionSet;
bool imageStored;
} GFX_GOL_OBJ_HEADER;
Description
GFX_GOL_OBJ_HEADER
This structure defines the Graphics Object Layer header used in all objects in the Graphics Library.
Members
Members Description
uint16_t ID; Unique id assigned for referencing.
void * pNxtObj; A pointer to the next object.
GFX_GOL_OBJ_TYPE type; Identifies the type of GOL object.
uint16_t state; State of object.
uint16_t left; Left position of the Object.
uint16_t top; Top position of the Object.
uint16_t right; Right position of the Object.
uint16_t bottom; Bottom position of the Object.
GFX_GOL_OBJ_SCHEME * pGolScheme; Pointer to the scheme used.
DRAW_FUNC DrawObj; function pointer to the object's draw function.
FREE_FUNC FreeObj; function pointer to the object's free function.
ACTIONGET_FUNC actionGet; function pointer to the object's action get function.
ACTIONSET_FUNC actionSet; function pointer to the object's action set function.
bool imageStored; Used for alpha blending
Remarks
None.
5.2.2.7.26.44 GFX_GOL_OBJ_SCHEME Structure
C
typedef struct {
GFX_COLOR EmbossDkColor;
GFX_COLOR EmbossLtColor;
GFX_COLOR TextColor0;
GFX_COLOR TextColor1;
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GFX_COLOR TextColorDisabled;
GFX_COLOR Color0;
GFX_COLOR Color1;
GFX_COLOR ColorDisabled;
GFX_RESOURCE_HDR * pFont;
GFX_FILL_STYLE fillStyle;
GFX_COLOR CommonBkColor;
uint16_t CommonBkLeft;
uint16_t CommonBkTop;
GFX_BACKGROUND_TYPE CommonBkType;
GFX_RESOURCE_HDR * pCommonBkImage;
uint16_t AlphaValue;
GFX_COLOR gradientStartColor;
GFX_COLOR gradientEndColor;
uint16_t EmbossSize;
} GFX_GOL_OBJ_SCHEME;
Description
GFX_GOL_OBJ_SCHEME
This structure specifies the style scheme components of an object. All objects will use the style scheme when rendering. Refer to
specific object documentation on how the style scheme colors are utilized by the object.
The style scheme allows objects to show 3D effects as well as feedback to users. For example, in Button objects, a press and
release effect on the Buttons are easily shown by manipulating the colors when the object is drawn with a pressed state and
released state. The style scheme also allows effects such as gradients and alpha blending. When using alpha blending, the style
scheme requires objects to be associated with background information.
A background can be a flat color background or an image. The usage of a background requires the background dimension to be
larger than the object. In other words, the object should be drawn within the background dimension. Multiple objects can share a
common background. As long as all the objects are drawn within the dimension of the background they can share a common
background.
The supported background types are (See GFX_BACKGROUND_TYPE):
• GFX_BACKGROUND_COLOR - this type will set the common background to be a flat color. The color used is specified by
CommonBkType.
• GFX_BACKGROUND_IMAGE - this tyoe will set the common background to be an image. The image used is specified by
pCommonBkImage.
When an object is associated with a background, it can be easily hidden or redrawn with some effects (for example alpha
blending with the background). The background information allows the redrawing of the background with the object without the
need to manually refreshing the background using primitive calls by the application.
Members
Members Description
GFX_COLOR EmbossDkColor; Emboss dark color used for 3d effect.
GFX_COLOR EmbossLtColor; Emboss light color used for 3d effect.
GFX_COLOR TextColor0; Character color 0 used for objects that supports text.
GFX_COLOR TextColor1; Character color 1 used for objects that supports text.
GFX_COLOR TextColorDisabled; Character color used when object is in a disabled state.
GFX_COLOR Color0; Color 0 usually assigned to an Object state.
GFX_COLOR Color1; Color 1 usually assigned to an Object state.
GFX_COLOR ColorDisabled; Color used when an Object is in a disabled state.
GFX_RESOURCE_HDR * pFont; Font selected for the scheme.
GFX_FILL_STYLE fillStyle; must be set to a gradient type when using gradient
GFX_COLOR CommonBkColor; Background color used to hide Objects.
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uint16_t CommonBkLeft; Horizontal starting position of the background.
uint16_t CommonBkTop; Horizontal starting position of the background.
GFX_BACKGROUND_TYPE
CommonBkType;
Specifies the type of background to use.
GFX_RESOURCE_HDR *
pCommonBkImage;
Pointer to the background image used. Set this
uint16_t AlphaValue; Alpha value used for alpha blending
GFX_COLOR gradientStartColor; start color of the gradient fill
GFX_COLOR gradientEndColor; end color of the gradient fill
uint16_t EmbossSize; Emboss size of the panel for 3-D effect. Set to zero if not used.
Remarks
None.
5.2.2.7.26.45 GFX_GOL_OBJ_TYPE Enumeration
C
typedef enum {
GFX_GOL_ANALOGCLOCK_TYPE,
GFX_GOL_BUTTON_TYPE,
GFX_GOL_CHART_TYPE,
GFX_GOL_CHECKBOX_TYPE,
GFX_GOL_DIGITALMETER_TYPE,
GFX_GOL_EDITBOX_TYPE,
GFX_GOL_GRID_TYPE,
GFX_GOL_GROUPBOX_TYPE,
GFX_GOL_LISTBOX_TYPE,
GFX_GOL_METER_TYPE,
GFX_GOL_PICTURECONTROL_TYPE,
GFX_GOL_PROGRESSBAR_TYPE,
GFX_GOL_RADIOBUTTON_TYPE,
GFX_GOL_SCROLLBAR_TYPE,
GFX_GOL_STATICTEXT_TYPE,
GFX_GOL_TEXTENTRY_TYPE,
GFX_GOL_WINDOW_TYPE,
GFX_GOL_CUSTOM_TYPE,
GFX_GOL_UNKNOWN_TYPE
} GFX_GOL_OBJ_TYPE;
Description
GFX_GOL_OBJ_TYPE
This enumeration specifies the different object types used in the library.
Members
Members Description
GFX_GOL_ANALOGCLOCK_TYPE Type defined for Analog Clock Object.
GFX_GOL_BUTTON_TYPE Type defined for Button Object.
GFX_GOL_CHART_TYPE Type defined for Chart Object.
GFX_GOL_CHECKBOX_TYPE Type defined for Check Box Object.
GFX_GOL_DIGITALMETER_TYPE Type defined for Digital Meter Object.
GFX_GOL_EDITBOX_TYPE Type defined for Edit Box Object.
GFX_GOL_GRID_TYPE Type defined for Grid Object.
GFX_GOL_GROUPBOX_TYPE Type defined for Group Box Object.
GFX_GOL_LISTBOX_TYPE Type defined for List Box Object.
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GFX_GOL_METER_TYPE Type defined for Meter Object.
GFX_GOL_PICTURECONTROL_TYPE Type defined for Picture Control Object.
GFX_GOL_PROGRESSBAR_TYPE Type defined for Progress Bar Object.
GFX_GOL_RADIOBUTTON_TYPE Type defined for Radio Button Object.
GFX_GOL_SCROLLBAR_TYPE Type defined for Slider or Scroll Bar Object.
GFX_GOL_STATICTEXT_TYPE Type defined for Static Text Object.
GFX_GOL_TEXTENTRY_TYPE Type defined for Text-Entry Object.
GFX_GOL_WINDOW_TYPE Type defined for Window Object.
GFX_GOL_CUSTOM_TYPE Type defined for Custom Object.
GFX_GOL_UNKNOWN_TYPE Type is undefined and not supported by the library.
Remarks
None.
5.2.2.7.26.46 GFX_GOL_PROGRESSBAR Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
uint16_t pos;
uint16_t prevPos;
uint16_t range;
} GFX_GOL_PROGRESSBAR;
Description
The structure contains data for the progress bar
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_GOL_OBJ_HEADER).
uint16_t pos; Current progress position.
uint16_t prevPos; Previous progress position.
uint16_t range; Sets the range of the object.
5.2.2.7.26.47 GFX_GOL_PROGRESSBAR_STATE Enumeration
C
typedef enum {
GFX_GOL_PROGRESSBAR_DISABLED_STATE = 0x0002,
GFX_GOL_PROGRESSBAR_VERTICAL_STATE = 0x0004,
GFX_GOL_PROGRESSBAR_NOPROGRESS_STATE = 0x0008,
GFX_GOL_PROGRESSBAR_DRAW_BAR_STATE = 0x2000,
GFX_GOL_PROGRESSBAR_DRAW_STATE = 0x4000,
GFX_GOL_PROGRESSBAR_HIDE_STATE = 0x8000
} GFX_GOL_PROGRESSBAR_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_PROGRESSBAR_DISABLED_STATE =
0x0002
Bit for disabled state.
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GFX_GOL_PROGRESSBAR_VERTICAL_STATE =
0x0004
Bit for orientation (0- horizontal, 1 - vertical).
GFX_GOL_PROGRESSBAR_NOPROGRESS_STATE
= 0x0008
Bit suppress rendering of progress in text.
GFX_GOL_PROGRESSBAR_DRAW_BAR_STATE =
0x2000
Bit to indicate object must be redrawn.
GFX_GOL_PROGRESSBAR_DRAW_STATE =
0x4000
Bit to indicate object must be redrawn.
GFX_GOL_PROGRESSBAR_HIDE_STATE = 0x8000 Bit to indicate object must be removed from screen.
5.2.2.7.26.48 GFX_GOL_RADIOBUTTON Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
GFX_GOL_OBJ_HEADER * pHead;
GFX_GOL_OBJ_HEADER * pNext;
uint16_t textHeight;
GFX_XCHAR * pText;
GFX_ALIGNMENT alignment;
} GFX_GOL_RADIOBUTTON;
Description
the structure contains data for the Radio Button
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see OBJ_HEADER).
GFX_GOL_OBJ_HEADER * pHead; Pointer to the first Radio Button in the group
GFX_GOL_OBJ_HEADER * pNext; Pointer to the next Radio Button in the group
uint16_t textHeight; Pre-computed text height
GFX_XCHAR * pText; Pointer to the text
GFX_ALIGNMENT alignment; text alignment
5.2.2.7.26.49 GFX_GOL_RADIOBUTTON_STATE Enumeration
C
typedef enum {
GFX_GOL_RADIOBUTTON_FOCUSED_STATE = 0x0001,
GFX_GOL_RADIOBUTTON_DISABLED_STATE = 0x0002,
GFX_GOL_RADIOBUTTON_CHECKED_STATE = 0x0004,
GFX_GOL_RADIOBUTTON_GROUP_STATE = 0x0008,
GFX_GOL_RADIOBUTTON_DRAW_CHECK_STATE = 0x1000,
GFX_GOL_RADIOBUTTON_DRAW_FOCUS_STATE = 0x2000,
GFX_GOL_RADIOBUTTON_DRAW_STATE = 0x4000,
GFX_GOL_RADIOBUTTON_HIDE_STATE = 0x8000
} GFX_GOL_RADIOBUTTON_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_RADIOBUTTON_FOCUSED_STATE =
0x0001
Bit for focus state.
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GFX_GOL_RADIOBUTTON_DISABLED_STATE =
0x0002
Bit for disabled state.
GFX_GOL_RADIOBUTTON_CHECKED_STATE =
0x0004
Bit to indicate Radio Button is checked.
GFX_GOL_RADIOBUTTON_GROUP_STATE =
0x0008
Bit to indicate the first Radio Button in the group. Each group MUST
have this bit set for its first member even for a single member group.
This means that any independent or stand alone Radio Button, the
RB_GROUP bit must be always set. or alone in the group.
GFX_GOL_RADIOBUTTON_DRAW_CHECK_STATE
= 0x1000
Bit to indicate check mark should be redrawn.
GFX_GOL_RADIOBUTTON_DRAW_FOCUS_STATE
= 0x2000
Bit to indicate focus must be redrawn.
GFX_GOL_RADIOBUTTON_DRAW_STATE =
0x4000
Bit to indicate object must be redrawn.
GFX_GOL_RADIOBUTTON_HIDE_STATE = 0x8000 Bit to indicate object must be removed from screen.
5.2.2.7.26.50 GFX_GOL_ROUNDDIAL Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
uint16_t xCenter;
uint16_t yCenter;
uint16_t radius;
uint16_t value;
uint16_t max;
uint16_t res;
uint16_t curr_xPos;
uint16_t curr_yPos;
uint16_t new_xPos;
uint16_t new_yPos;
short vAngle;
} GFX_GOL_ROUNDDIAL;
Description
The curr_xPos, curr_yPos, new_xPos and new_yPos parameters are internally generated to aid in the redrawing of the dial.
User must avoid modifying these values.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_OBJ_HEADER).
uint16_t xCenter; x coordinate center position.
uint16_t yCenter; y coordinate center position.
uint16_t radius; Radius of the dial.
uint16_t value; Initial value of the dial.
uint16_t max; Maximum value of variable value (maximum = 65535).
uint16_t res; Resolution of movement.
uint16_t curr_xPos; Current x position.
uint16_t curr_yPos; Current y position.
uint16_t new_xPos; New x position.
uint16_t new_yPos; New y position.
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5.2.2.7.26.51 GFX_GOL_SCROLLBAR Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
int16_t currPos;
uint16_t prevPos;
uint16_t range;
int16_t pos;
uint16_t page;
uint16_t thWidth;
uint16_t thHeight;
} GFX_GOL_SCROLLBAR;
Description
Defines the parameters required for a slider/scrollbar Object. Depending on the
GFX_GOL_SCROLLBAR_SLIDER_MODE_STATE state bit slider or scrollbar mode is set. If
GFX_GOL_SCROLLBAR_SLIDER_MODE_STATE is set, mode is slider; if not set mode is scroll bar. For scrollbar mode, focus
rectangle is not drawn.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_GOL_OBJ_HEADER).
int16_t currPos; Position of the slider relative to minimum.
uint16_t prevPos; Previous position of the slider relative to minimum.
uint16_t range; User defined range of the slider. Minimum value at 0 and maximum at 0x7FFF.
int16_t pos; Position of the slider in range domain.
uint16_t page; User specified resolution to incrementally change the position in range domain.
uint16_t thWidth; Thumb width. This is computed internally. User must not change this value.
uint16_t thHeight; Thumb width. This is computed internally. User must not change this value.
5.2.2.7.26.52 GFX_GOL_SCROLLBAR_STATE Enumeration
C
typedef enum {
GFX_GOL_SCROLLBAR_FOCUSED_STATE = 0x0001,
GFX_GOL_SCROLLBAR_DISABLED_STATE = 0x0002,
GFX_GOL_SCROLLBAR_VERTICAL_STATE = 0x0004,
GFX_GOL_SCROLLBAR_SLIDER_MODE_STATE = 0x0010,
GFX_GOL_SCROLLBAR_DRAW_THUMB_STATE = 0x1000,
GFX_GOL_SCROLLBAR_DRAW_FOCUS_STATE = 0x2000,
GFX_GOL_SCROLLBAR_DRAW_STATE = 0x4000,
GFX_GOL_SCROLLBAR_HIDE_STATE = 0x8000
} GFX_GOL_SCROLLBAR_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_SCROLLBAR_FOCUSED_STATE =
0x0001
Bit for focus state.
GFX_GOL_SCROLLBAR_DISABLED_STATE =
0x0002
Bit for disabled state.
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GFX_GOL_SCROLLBAR_VERTICAL_STATE =
0x0004
Bit to indicate the scroll bar is drawn with vertical orientation
GFX_GOL_SCROLLBAR_SLIDER_MODE_STATE
= 0x0010
Bit to indicate the scroll bar is in slider mode.
GFX_GOL_SCROLLBAR_DRAW_THUMB_STATE
= 0x1000
Bit to indicate that only the thumb area will be redrawn
GFX_GOL_SCROLLBAR_DRAW_FOCUS_STATE
= 0x2000
Bit to indicate focus must be redrawn.
GFX_GOL_SCROLLBAR_DRAW_STATE =
0x4000
Bit to indicate object must be redrawn.
GFX_GOL_SCROLLBAR_HIDE_STATE = 0x8000 Bit to indicate object must be removed from screen.
5.2.2.7.26.53 GFX_GOL_STATICTEXT Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
GFX_XCHAR * pText;
GFX_ALIGNMENT alignment;
} GFX_GOL_STATICTEXT;
Description
Defines the parameters required for a Static Text Object.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see OBJ_HEADER).
GFX_XCHAR * pText; The pointer to text used.
GFX_ALIGNMENT alignment; text alignment
5.2.2.7.26.54 GFX_GOL_STATICTEXT_STATE Enumeration
C
typedef enum {
GFX_GOL_STATICTEXT_DISABLED_STATE = 0x0002,
GFX_GOL_STATICTEXT_FRAME_STATE = 0x0010,
GFX_GOL_STATICTEXT_NOBACKGROUND_STATE = 0x0020,
GFX_GOL_STATICTEXT_DRAW_UPDATE = 0x2000,
GFX_GOL_STATICTEXT_DRAW_STATE = 0x4000,
GFX_GOL_STATICTEXT_HIDE_STATE = 0x8000
} GFX_GOL_STATICTEXT_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_STATICTEXT_DISABLED_STATE =
0x0002
Bit for disabled state.
GFX_GOL_STATICTEXT_FRAME_STATE = 0x0010 Bit to indicate frame is enabled.
GFX_GOL_STATICTEXT_NOBACKGROUND_STATE
= 0x0020
Bit to indicate background is enabled.
GFX_GOL_STATICTEXT_DRAW_UPDATE = 0x2000 Bit to indicate object must be redrawn.
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GFX_GOL_STATICTEXT_DRAW_STATE = 0x4000 Bit to indicate object must be redrawn.
GFX_GOL_STATICTEXT_HIDE_STATE = 0x8000 Bit to indicate object must be removed from screen.
5.2.2.7.26.55 GFX_GOL_TEXTENTRY Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
uint16_t horizontalKeys;
uint16_t verticalKeys;
GFX_XCHAR * pTeOutput;
GFX_ALIGNMENT alignment;
uint16_t CurrentLength;
uint16_t outputLenMax;
KEYMEMBER * pActiveKey;
KEYMEMBER * pHeadOfList;
GFX_RESOURCE_HDR * pDisplayFont;
} GFX_GOL_TEXTENTRY;
Description
Defines the parameters required for a TextEntry Object.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all objects (see GFX_GOL_OBJ_HEADER).
uint16_t horizontalKeys; Number of horizontal keys
uint16_t verticalKeys; Number of vertical keys
GFX_XCHAR * pTeOutput; Pointer to the buffer assigned by the user which holds the text shown in the
editbox.
GFX_ALIGNMENT alignment; text alignment
uint16_t CurrentLength; Current length of the string in the buffer. The maximum value of this is equal to
outputLenMax.
uint16_t outputLenMax; Maximum expected length of output buffer pTeOutput
KEYMEMBER * pActiveKey; Pointer to the active key KEYMEMBER. This is only used by the Widget. User
must not change the value of this parameter directly.
KEYMEMBER * pHeadOfList; Pointer to head of the list
GFX_RESOURCE_HDR * pDisplayFont; Pointer to the font used in displaying the text.
5.2.2.7.26.56 GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE Enumeration
C
typedef enum {
GFX_GOL_TEXTENTRY_NONE_COM = 0x00,
GFX_GOL_TEXTENTRY_DELETE_COM = 0x01,
GFX_GOL_TEXTENTRY_SPACE_COM = 0x02,
GFX_GOL_TEXTENTRY_ENTER_COM = 0x03
} GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE;
Description
Optional COMMANDS assigned to keys
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Members
Members Description
GFX_GOL_TEXTENTRY_NONE_COM =
0x00
This type is used when the key is not assigned to any command.
GFX_GOL_TEXTENTRY_DELETE_COM
= 0x01
This type is used to assign a "delete" command on a key.
GFX_GOL_TEXTENTRY_SPACE_COM =
0x02
This type is used to assign an insert "space" command on a key.
GFX_GOL_TEXTENTRY_ENTER_COM =
0x03
This type is used to assign an "enter" (carriage return) command on a key.
5.2.2.7.26.57 GFX_GOL_TEXTENTRY_STATE Enumeration
C
typedef enum {
GFX_GOL_TEXTENTRY_DISABLED_STATE = 0x0002,
GFX_GOL_TEXTENTRY_KEY_PRESSED_STATE = 0x0004,
GFX_GOL_TEXTENTRY_ECHO_HIDE_STATE = 0x0008,
GFX_GOL_TEXTENTRY_DRAW_STATE = 0x4000,
GFX_GOL_TEXTENTRY_HIDE_STATE = 0x8000,
GFX_GOL_TEXTENTRY_UPDATE_KEY_STATE = 0x2000,
GFX_GOL_TEXTENTRY_UPDATE_TEXT_STATE = 0x1000
} GFX_GOL_TEXTENTRY_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_TEXTENTRY_DISABLED_STATE =
0x0002
Bit for disabled state.
GFX_GOL_TEXTENTRY_KEY_PRESSED_STATE
= 0x0004
Bit for press state.
GFX_GOL_TEXTENTRY_ECHO_HIDE_STATE =
0x0008
Bit to hide the entered characters and instead echo "*" characters to the
display.
GFX_GOL_TEXTENTRY_DRAW_STATE = 0x4000 Bit to indicate object must be redrawn.
GFX_GOL_TEXTENTRY_HIDE_STATE = 0x8000 Bit to indicate object must be removed from screen.
GFX_GOL_TEXTENTRY_UPDATE_KEY_STATE
= 0x2000
Bit to indicate redraw of a key is needed
GFX_GOL_TEXTENTRY_UPDATE_TEXT_STATE
= 0x1000
Bit to indicate redraw of the text displayed is needed.
5.2.2.7.26.58 GFX_GOL_TRANSLATED_ACTION Enumeration
C
typedef enum {
GFX_GOL_OBJECT_ACTION_INVALID = 0x3500,
GFX_GOL_OBJECT_ACTION_PASSIVE,
GFX_GOL_ANALOGCLOCK_ACTION_PRESSED,
GFX_GOL_ANALOGCLOCK_ACTION_RELEASED,
GFX_GOL_BUTTON_ACTION_PRESSED,
GFX_GOL_BUTTON_ACTION_STILLPRESSED,
GFX_GOL_BUTTON_ACTION_RELEASED,
GFX_GOL_BUTTON_ACTION_CANCELPRESS,
GFX_GOL_CHART_ACTION_SELECTED,
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GFX_GOL_CHECKBOX_ACTION_CHECKED,
GFX_GOL_CHECKBOX_ACTION_UNCHECKED,
GFX_GOL_CUSTOMCONTROL_ACTION_SELECTED,
GFX_GOL_DIGITALMETER_ACTION_SELECTED,
GFX_GOL_EDITBOX_ACTION_ADD_CHAR,
GFX_GOL_EDITBOX_ACTION_DEL_CHAR,
GFX_GOL_EDITBOX_ACTION_TOUCHSCREEN,
GFX_GOL_GRID_ACTION_TOUCHED,
GFX_GOL_GRID_ACTION_ITEM_SELECTED,
GFX_GOL_GRID_ACTION_UP,
GFX_GOL_GRID_ACTION_DOWN,
GFX_GOL_GRID_ACTION_LEFT,
GFX_GOL_GRID_ACTION_RIGHT,
GFX_GOL_GROUPBOX_ACTION_SELECTED,
GFX_GOL_LISTBOX_ACTION_SELECTED,
GFX_GOL_LISTBOX_ACTION_MOVE,
GFX_GOL_LISTBOX_ACTION_TOUCHSCREEN,
GFX_GOL_METER_ACTION_SET,
GFX_GOL_PICTURECONTROL_ACTION_SELECTED,
GFX_GOL_PROGRESSBAR_ACTION_SELECTED,
GFX_GOL_RADIOBUTTON_ACTION_CHECKED,
GFX_GOL_SCROLLBAR_ACTION_INC,
GFX_GOL_SCROLLBAR_ACTION_DEC,
GFX_GOL_STATICTEXT_ACTION_SELECTED,
GFX_GOL_TEXTENTRY_ACTION_RELEASED,
GFX_GOL_TEXTENTRY_ACTION_PRESSED,
GFX_GOL_TEXTENTRY_ACTION_ADD_CHAR,
GFX_GOL_TEXTENTRY_ACTION_DELETE,
GFX_GOL_TEXTENTRY_ACTION_SPACE,
GFX_GOL_TEXTENTRY_ACTION_ENTER,
GFX_GOL_WINDOW_ACTION_CLIENT,
GFX_GOL_WINDOW_ACTION_TITLE
} GFX_GOL_TRANSLATED_ACTION;
Description
GFX_GOL_TRANSLATED_ACTION
This enumeration specifies the different object actions supported in the library.
Members
Members Description
GFX_GOL_OBJECT_ACTION_INVALID = 0x3500 Invalid message response.
GFX_GOL_OBJECT_ACTION_PASSIVE Passive message response. No change in object needed.
GFX_GOL_ANALOGCLOCK_ACTION_PRESSED Analog Clock Pressed Action
GFX_GOL_ANALOGCLOCK_ACTION_RELEASED Analog Clock Released Action
GFX_GOL_BUTTON_ACTION_PRESSED Button pressed action ID.
GFX_GOL_BUTTON_ACTION_STILLPRESSED Button is continuously pressed ID.
GFX_GOL_BUTTON_ACTION_RELEASED Button released action ID.
GFX_GOL_BUTTON_ACTION_CANCELPRESS Button released action ID with button press canceled.
GFX_GOL_CHART_ACTION_SELECTED Chart selected action ID
GFX_GOL_CHECKBOX_ACTION_CHECKED Check Box check action ID.
GFX_GOL_CHECKBOX_ACTION_UNCHECKED Check Box un-check action ID.
GFX_GOL_CUSTOMCONTROL_ACTION_SELECTED Custom Control selected action ID.
GFX_GOL_DIGITALMETER_ACTION_SELECTED Digital Meter selected action ID.
GFX_GOL_EDITBOX_ACTION_ADD_CHAR Edit Box insert character action ID.
GFX_GOL_EDITBOX_ACTION_DEL_CHAR Edit Box remove character action ID.
GFX_GOL_EDITBOX_ACTION_TOUCHSCREEN Edit Box touchscreen selected action ID.
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GFX_GOL_GRID_ACTION_TOUCHED Grid item touched action ID.
GFX_GOL_GRID_ACTION_ITEM_SELECTED Grid item selected action ID.
GFX_GOL_GRID_ACTION_UP Grid up action ID.
GFX_GOL_GRID_ACTION_DOWN Grid down action ID.
GFX_GOL_GRID_ACTION_LEFT Grid left action ID.
GFX_GOL_GRID_ACTION_RIGHT Grid right action ID.
GFX_GOL_GROUPBOX_ACTION_SELECTED Group Box selected action ID.
GFX_GOL_LISTBOX_ACTION_SELECTED List Box item select action ID.
GFX_GOL_LISTBOX_ACTION_MOVE List Box item move action ID.
GFX_GOL_LISTBOX_ACTION_TOUCHSCREEN List Box touchscreen selected action ID.
GFX_GOL_METER_ACTION_SET Meter set value action ID.
GFX_GOL_PICTURECONTROL_ACTION_SELECTED Picture selected action ID.
GFX_GOL_PROGRESSBAR_ACTION_SELECTED Progress Bar selected action ID.
GFX_GOL_RADIOBUTTON_ACTION_CHECKED Radio Button check action ID.
GFX_GOL_SCROLLBAR_ACTION_INC Slider or Scroll Bar increment action ID.
GFX_GOL_SCROLLBAR_ACTION_DEC Slider or Scroll Bar decrement action ID.
GFX_GOL_STATICTEXT_ACTION_SELECTED Static Text selected action ID.
GFX_GOL_TEXTENTRY_ACTION_RELEASED TextEntry released action ID
GFX_GOL_TEXTENTRY_ACTION_PRESSED TextEntry pressed action ID
GFX_GOL_TEXTENTRY_ACTION_ADD_CHAR TextEntry add character action ID
GFX_GOL_TEXTENTRY_ACTION_DELETE TextEntry delete character action ID
GFX_GOL_TEXTENTRY_ACTION_SPACE TextEntry add space character action ID
GFX_GOL_TEXTENTRY_ACTION_ENTER TextEntry enter action ID
GFX_GOL_WINDOW_ACTION_CLIENT Window client area selected action ID.
GFX_GOL_WINDOW_ACTION_TITLE Window title bar selected action ID.
Remarks
None.
5.2.2.7.26.59 GFX_GOL_TRANSLATED_ACTION, \ GFX_GOL_OBJ_HEADER *, \
GFX_GOL_MESSAGE * \ ) Type
C
typedef (boolGFX_GOL_MESSAGE_CALLBACK_FUNC GFX_GOL_TRANSLATED_ACTION, \ GFX_GOL_OBJ_HEADER *,
\ GFX_GOL_MESSAGE * \ ))();
Description
This application defined function is called by the GFX_GOL_ObjectMessage() function allowing the application the opportunity to
process the user messages and customize object behavior as well as application controlled functions.
GFX_GOL_ObjectMessage() calls this function when a valid message for an object in the active list is received. Application
implements any action for the message in this callback function. If this callback function returns true, the message for the object
will be processed using the default action of the object. If false is returned, the default action will not be performed. In this case, it
is assumed that this callback function has performed the appropriate changes to the states of the objects.
Preconditions
None.
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Parameters
Parameters Description
GFX_GOL_TRANSLATED_ACTION Translated message for the object
GFX_GOL_OBJ_HEADER * Pointer to the object that processed the message.
GFX_GOL_MESSAGE * Pointer to the message from user.
Returns
true - When true is returned, the object will set its state depending on the translated messages. false - When false is returned,
the object will not process the translated message and will assume the application has performed necessary action on the
message.
Example
None.
5.2.2.7.26.60 GFX_GOL_WINDOW Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
uint16_t textHeight;
GFX_XCHAR * pText;
GFX_ALIGNMENT alignment;
GFX_RESOURCE_HDR * pBitmap;
} GFX_GOL_WINDOW;
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_GOL_OBJ_HEADER).
uint16_t textHeight; Pre-computed text height
GFX_XCHAR * pText; Pointer to the title text
GFX_ALIGNMENT alignment; text alignment
GFX_RESOURCE_HDR * pBitmap; Pointer to the bitmap for the title bar
5.2.2.7.26.61 GFX_GOL_WINDOW_STATE Enumeration
C
typedef enum {
GFX_GOL_WINDOW_FOCUSED_STATE = 0x0001,
GFX_GOL_WINDOW_DISABLED_STATE = 0x0002,
GFX_GOL_WINDOW_TITLECENTER_STATE = 0x0004,
GFX_GOL_WINDOW_HIDE_STATE = 0x8000,
GFX_GOL_WINDOW_DRAW_CLIENT_STATE = 0x4000,
GFX_GOL_WINDOW_DRAW_TITLE_STATE = 0x2000,
GFX_GOL_WINDOW_DRAW_STATE = 0x6000
} GFX_GOL_WINDOW_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_WINDOW_FOCUSED_STATE =
0x0001
Bit for focus state
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GFX_GOL_WINDOW_DISABLED_STATE =
0x0002
Bit for disabled state
GFX_GOL_WINDOW_TITLECENTER_STATE
= 0x0004
Bit to center the text on the Title Area
GFX_GOL_WINDOW_HIDE_STATE = 0x8000 Bit to indicate window must be removed from screen
GFX_GOL_WINDOW_DRAW_CLIENT_STATE
= 0x4000
Bit to indicate client area must be redrawn
GFX_GOL_WINDOW_DRAW_TITLE_STATE
= 0x2000
Bit to indicate title area must be redrawn
GFX_GOL_WINDOW_DRAW_STATE =
0x6000
Bits to indicate whole window must be redrawn
5.2.2.7.26.62 GFX_GRADIENT_STYLE Structure
C
typedef struct {
GFX_FILL_STYLE type;
GFX_COLOR startColor;
GFX_COLOR endColor;
uint8_t length;
} GFX_GRADIENT_STYLE;
Description
This structure is used to describe the gradient style.
Members
Members Description
GFX_FILL_STYLE type; selected the gradient type
GFX_COLOR startColor; sets the starting color of gradient transition
GFX_COLOR endColor; sets the ending color of gradient transition
uint8_t length; defines the length of the gradient transition in pixels
5.2.2.7.26.63 GFX_LINE_STYLE Enumeration
C
typedef enum {
GFX_LINE_TYPE_MASK = 0x0007,
GFX_LINE_THICKNESS_MASK = 0x0010,
GFX_LINE_STYLE_THIN_SOLID = 0x0A00,
GFX_LINE_STYLE_THIN_DOTTED = 0x0A01,
GFX_LINE_STYLE_THIN_DASHED = 0x0A04,
GFX_LINE_STYLE_THICK_SOLID = 0x0A10,
GFX_LINE_STYLE_THICK_DOTTED = 0x0A11,
GFX_LINE_STYLE_THICK_DASHED = 0x0A14,
GFX_LINE_STYLE_ANTI_ALIASED = 0x0A20
} GFX_LINE_STYLE;
Description
Defines the types of line styles.
Members
Members Description
GFX_LINE_TYPE_MASK = 0x0007 DO NOT document, mask for line type
GFX_LINE_THICKNESS_MASK = 0x0010 DO NOT document, mask for thickness
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GFX_LINE_STYLE_THIN_SOLID = 0x0A00 solid line, 1 pixel wide (default)
GFX_LINE_STYLE_THIN_DOTTED =
0x0A01
dotted line, 1 pixel wide
GFX_LINE_STYLE_THIN_DASHED =
0x0A04
dashed line, , 1 pixel wide
GFX_LINE_STYLE_THICK_SOLID =
0x0A10
solid line, 3 pixel wide
GFX_LINE_STYLE_THICK_DOTTED =
0x0A11
dotted line, 3 pixel wide
GFX_LINE_STYLE_THICK_DASHED =
0x0A14
dashed line, 3 pixel wide
GFX_LINE_STYLE_ANTI_ALIASED =
0x0A20
anti-aliased line (future feature)
5.2.2.7.26.64 GFX_MCHP_BITMAP_HEADER Structure
C
typedef struct {
uint8_t bitmapType;
uint8_t colorDepth;
int16_t height;
int16_t width;
} GFX_MCHP_BITMAP_HEADER;
Description
Structure describing the bitmap header.
Members
Members Description
uint8_t bitmapType; type of image, information on how to render the image 0 - no compression, palette
is present for color depth = 8, 4 and 1 BPP 1 - palette is provided as a separate
object (see PALETTE_HEADER) for color depth = 8, 4, and 1 BPP, ID to the
palette is embedded in the bitmap.
uint8_t colorDepth; Color depth used
int16_t height; Image height
int16_t width; Image width
5.2.2.7.26.65 GFX_PALETTE_ENTRY Union
C
typedef union {
uint16_t value;
struct {
uint16_t r : 5;
uint16_t g : 6;
uint16_t b : 5;
} color;
struct {
uint16_t reserved : 12;
uint16_t luma : 4;
} monochrome;
} GFX_PALETTE_ENTRY;
Description
Structure used for the palette entries.
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• For TFT: color is defined as 5-6-5 RGB format (5-bits for RED, 6-bits for GREEN and 5-bits for BLUE.
• For Monochrome: 4 bits are used to represent the luma.
Members
Members Description
uint16_t value; a 16-bit value representing a color or palette entry
struct {
uint16_t r : 5;
uint16_t g : 6;
uint16_t b : 5;
} color;
color value in 5-6-5 RGB format
uint16_t r : 5; represents the RED component
uint16_t g : 6; represents the GREEN component
uint16_t b : 5; represents the BLUE component
struct {
uint16_t reserved : 12;
uint16_t luma : 4;
} monochrome;
monochrome LUMA value
uint16_t reserved : 12; reserved, used as a filler
uint16_t luma : 4; monochrome LUMA value
5.2.2.7.26.66 GFX_PARTIAL_IMAGE_PARAM Structure
C
typedef struct {
uint16_t width;
uint16_t height;
uint16_t xoffset;
uint16_t yoffset;
} GFX_PARTIAL_IMAGE_PARAM;
Description
Structure describing the partial image area to render.
Members
Members Description
uint16_t width; Partial Image width
uint16_t height; Partial Image height
uint16_t xoffset; xoffset of tha partial image (with respect to the image horizontal origin)
uint16_t yoffset; yoffset of tha partial image (with respect to the image vertical origin)
5.2.2.7.26.67 GFX_Primitive_DATA Structure
C
typedef struct {
volatile uint8_t activePage;
volatile uint8_t visualPage;
uint8_t transitionPage;
uint8_t foregroundPage;
uint8_t backgroundPage;
uint8_t destinationPage;
GFX_LINE_STYLE lineType;
uint16_t cursorX;
uint16_t cursorY;
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GFX_BEVEL_RENDER_TYPE bevelDrawType;
GFX_COLOR currentColor;
GFX_FONT_CURRENT currentFont;
GFX_RESOURCE_HDR * pResource;
GFX_ALPHA_PARAMS alphaArea;
GFX_TRANSITION_PARAMS transitionParams;
GFX_COLOR line[480];
GFX_COLOR alphaLine[480];
uint8_t InvalidatedRectangleCount;
GFX_GRADIENT_STYLE gradientStyle;
} GFX_Primitive_DATA;
Description
GFX primitive data
Members
Members Description
uint8_t foregroundPage; Initialize Alpha Values
GFX_COLOR currentColor; Current Color for the instance
GFX_COLOR line[480]; Storage for line data
GFX_COLOR alphaLine[480]; Storage for alpha line data
uint8_t InvalidatedRectangleCount; Double Buffer Variable
Remarks
None.
5.2.2.7.26.68 GFX_RECTANGULAR_AREA Structure
C
typedef struct {
uint16_t left;
uint16_t top;
uint16_t right;
uint16_t bottom;
} GFX_RECTANGULAR_AREA;
Description
Structure describing a rectangular area in the frame buffer.
5.2.2.7.26.69 GFX_RESOURCE Enumeration
C
typedef enum {
GFX_RESOURCE_MEMORY_FLASH = 0x0000,
GFX_RESOURCE_MEMORY_EXTERNAL = 0x0001,
GFX_RESOURCE_MEMORY_RAM = 0x0004,
GFX_RESOURCE_MEMORY_EDS_EPMP = 0x0005,
GFX_RESOURCE_TYPE_MCHP_MBITMAP = 0x0000,
GFX_RESOURCE_TYPE_JPEG = 0x0100,
GFX_RESOURCE_TYPE_BINARY = 0x0200,
GFX_RESOURCE_TYPE_FONT = 0x0300,
GFX_RESOURCE_TYPE_PALETTE = 0x0400,
GFX_RESOURCE_COMP_NONE = 0x0000,
GFX_RESOURCE_COMP_RLE = 0x1000,
GFX_RESOURCE_COMP_IPU = 0x2000,
GFX_RESOURCE_MCHP_MBITMAP_FLASH_NONE = (GFX_RESOURCE_TYPE_MCHP_MBITMAP |
GFX_RESOURCE_MEMORY_FLASH | GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_MCHP_MBITMAP_FLASH_RLE = (GFX_RESOURCE_TYPE_MCHP_MBITMAP |
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GFX_RESOURCE_MEMORY_FLASH | GFX_RESOURCE_COMP_RLE),
GFX_RESOURCE_MCHP_MBITMAP_FLASH_IPU = (GFX_RESOURCE_TYPE_MCHP_MBITMAP |
GFX_RESOURCE_MEMORY_FLASH | GFX_RESOURCE_COMP_IPU),
GFX_RESOURCE_MCHP_MBITMAP_EXTERNAL_NONE = (GFX_RESOURCE_TYPE_MCHP_MBITMAP |
GFX_RESOURCE_MEMORY_EXTERNAL | GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_MCHP_MBITMAP_EXTERNAL_RLE = (GFX_RESOURCE_TYPE_MCHP_MBITMAP |
GFX_RESOURCE_MEMORY_EXTERNAL | GFX_RESOURCE_COMP_RLE),
GFX_RESOURCE_MCHP_MBITMAP_EXTERNAL_IPU = (GFX_RESOURCE_TYPE_MCHP_MBITMAP |
GFX_RESOURCE_MEMORY_EXTERNAL | GFX_RESOURCE_COMP_IPU),
GFX_RESOURCE_MCHP_MBITMAP_EDS_EPMP_NONE = (GFX_RESOURCE_TYPE_MCHP_MBITMAP |
GFX_RESOURCE_MEMORY_EDS_EPMP | GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_MCHP_MBITMAP_EDS_EPMP_RLE = (GFX_RESOURCE_TYPE_MCHP_MBITMAP |
GFX_RESOURCE_MEMORY_EDS_EPMP | GFX_RESOURCE_COMP_RLE),
GFX_RESOURCE_MCHP_MBITMAP_EDS_EPMP_IPU = (GFX_RESOURCE_TYPE_MCHP_MBITMAP |
GFX_RESOURCE_MEMORY_EDS_EPMP | GFX_RESOURCE_COMP_IPU),
GFX_RESOURCE_JPEG_FLASH_NONE = (GFX_RESOURCE_TYPE_JPEG | GFX_RESOURCE_MEMORY_FLASH |
GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_JPEG_EXTERNAL_NONE = (GFX_RESOURCE_TYPE_JPEG | GFX_RESOURCE_MEMORY_EXTERNAL |
GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_JPEG_EDS_EPMP_NONE = (GFX_RESOURCE_TYPE_JPEG | GFX_RESOURCE_MEMORY_EDS_EPMP |
GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_BINARY_FLASH_NONE = (GFX_RESOURCE_TYPE_BINARY | GFX_RESOURCE_MEMORY_FLASH |
GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_BINARY_FLASH_IPU = (GFX_RESOURCE_TYPE_BINARY | GFX_RESOURCE_MEMORY_FLASH |
GFX_RESOURCE_COMP_IPU),
GFX_RESOURCE_BINARY_EXTERNAL_NONE = (GFX_RESOURCE_TYPE_BINARY | GFX_RESOURCE_MEMORY_EXTERNAL
| GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_BINARY_EXTERNAL_IPU = (GFX_RESOURCE_TYPE_BINARY | GFX_RESOURCE_MEMORY_EXTERNAL
| GFX_RESOURCE_COMP_IPU),
GFX_RESOURCE_BINARY_EDS_EPMP_NONE = (GFX_RESOURCE_TYPE_BINARY | GFX_RESOURCE_MEMORY_EDS_EPMP
| GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_BINARY_EDS_EPMP_IPU = (GFX_RESOURCE_TYPE_BINARY | GFX_RESOURCE_MEMORY_EDS_EPMP
| GFX_RESOURCE_COMP_IPU),
GFX_RESOURCE_FONT_FLASH_NONE = (GFX_RESOURCE_TYPE_FONT | GFX_RESOURCE_MEMORY_FLASH |
GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_FONT_EXTERNAL_NONE = (GFX_RESOURCE_TYPE_FONT | GFX_RESOURCE_MEMORY_EXTERNAL |
GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_FONT_RAM_NONE = (GFX_RESOURCE_TYPE_FONT | GFX_RESOURCE_MEMORY_RAM |
GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_FONT_EDS_NONE = (GFX_RESOURCE_TYPE_FONT | GFX_RESOURCE_MEMORY_EDS_EPMP |
GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_PALETTE_FLASH_NONE = (GFX_RESOURCE_TYPE_PALETTE | GFX_RESOURCE_MEMORY_FLASH |
GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_PALETTE_EXTERNAL_NONE = (GFX_RESOURCE_TYPE_PALETTE |
GFX_RESOURCE_MEMORY_EXTERNAL | GFX_RESOURCE_COMP_NONE),
GFX_RESOURCE_PALETTE_RAM_NONE = (GFX_RESOURCE_TYPE_PALETTE | GFX_RESOURCE_MEMORY_RAM |
GFX_RESOURCE_COMP_NONE)
} GFX_RESOURCE;
Description
Memory type enumeration to determine the source of data. Used in interpreting images, fonts and palette from different memory
sources.
Members
Members Description
GFX_RESOURCE_MEMORY_FLASH = 0x0000 internal flash
GFX_RESOURCE_MEMORY_EXTERNAL = 0x0001 external memory
GFX_RESOURCE_MEMORY_RAM = 0x0004 RAM
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GFX_RESOURCE_MEMORY_EDS_EPMP = 0x0005 memory in EPMP, base addresses are are set in the hardware profile
GFX_RESOURCE_TYPE_MCHP_MBITMAP =
0x0000
data resource is type Microchip bitmap
GFX_RESOURCE_TYPE_JPEG = 0x0100 data resource is type JPEG
GFX_RESOURCE_TYPE_BINARY = 0x0200 data resource is type binary
GFX_RESOURCE_TYPE_FONT = 0x0300 data resource is type font
GFX_RESOURCE_TYPE_PALETTE = 0x0400 data resource is type palette
GFX_RESOURCE_COMP_NONE = 0x0000 data resource has no compression
GFX_RESOURCE_COMP_RLE = 0x1000 data resource is compressed with RLE
GFX_RESOURCE_COMP_IPU = 0x2000 data resource compressed with DEFLATE (for IPU)
GFX_RESOURCE_MCHP_MBITMAP_FLASH_NONE
= (GFX_RESOURCE_TYPE_MCHP_MBITMAP |
GFX_RESOURCE_MEMORY_FLASH |
GFX_RESOURCE_COMP_NONE)
These are common resource combinations used by the graphics library
Bitmaps
GFX_RESOURCE_JPEG_FLASH_NONE =
(GFX_RESOURCE_TYPE_JPEG |
GFX_RESOURCE_MEMORY_FLASH |
GFX_RESOURCE_COMP_NONE)
JPEGS
GFX_RESOURCE_BINARY_FLASH_NONE =
(GFX_RESOURCE_TYPE_BINARY |
GFX_RESOURCE_MEMORY_FLASH |
GFX_RESOURCE_COMP_NONE)
Binary
GFX_RESOURCE_FONT_FLASH_NONE =
(GFX_RESOURCE_TYPE_FONT |
GFX_RESOURCE_MEMORY_FLASH |
GFX_RESOURCE_COMP_NONE)
Fonts
GFX_RESOURCE_PALETTE_FLASH_NONE =
(GFX_RESOURCE_TYPE_PALETTE |
GFX_RESOURCE_MEMORY_FLASH |
GFX_RESOURCE_COMP_NONE)
Palettes
5.2.2.7.26.70 GFX_RESOURCE_BINARY Structure
C
typedef struct {
union {
uint32_t extAddress;
uint8_gfx_image_prog * progByteAddress;
uint16_gfx_image_prog * progWordAddress;
const char * constAddress;
char * ramAddress;
__eds__ char * edsAddress;
} location;
uint32_t size;
uint32_t param1;
uint32_t param2;
} GFX_RESOURCE_BINARY;
Description
Structure for Graphics Resource - binary data.
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Members
Members Description
uint32_t extAddress; generic address
uint8_gfx_image_prog * progByteAddress; for addresses in program section
uint16_gfx_image_prog *
progWordAddress;
for addresses in program section
const char * constAddress; for addresses in FLASH
char * ramAddress; for addresses in RAM
__eds__ char * edsAddress; for addresses in EDS
uint32_t param1; Parameters used for the GFX_RESOURCE. Depending on the GFX_RESOURCE
type definition of param1 can change. For IPU and RLE compressed images,
param1 indicates the compressed size of the image.
uint32_t param2; Parameters used for the GFX_RESOURCE. Depending on the GFX_RESOURCE
type
5.2.2.7.26.71 GFX_RESOURCE_FONT Structure
C
typedef struct {
union {
uint32_t extAddress;
GFX_FONT_SPACE char * progByteAddress;
char * ramAddress;
__eds__ char * edsAddress;
} location;
GFX_FONT_HEADER header;
} GFX_RESOURCE_FONT;
Description
Structure for Graphics Resource - Fonts.
Members
Members Description
__eds__ char * edsAddress; for addresses in EDS
5.2.2.7.26.72 GFX_RESOURCE_HDR Structure
C
typedef struct {
GFX_RESOURCE type;
uint16_t ID;
union {
GFX_RESOURCE_IMAGE image;
GFX_RESOURCE_FONT font;
GFX_RESOURCE_BINARY binary;
GFX_RESOURCE_PALETTE palette;
} resource;
} GFX_RESOURCE_HDR;
Description
Structure for Graphics Resource Header. This is the common header for all Graphics Resources.
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Members
Members Description
GFX_RESOURCE type; Graphics resource type, determines the type and location of data
uint16_t ID; memory ID, user defined value to differentiate between graphics resources of the
same type When using EDS_EPMP the following ID values are reserved and used
by the Microchip display driver 0 - reserved (do not use) 1 - reserved for base
address of EPMP CS1 2 - reserved for base address of EPMP CS2
5.2.2.7.26.73 GFX_RESOURCE_IMAGE Structure
C
typedef struct {
union {
uint32_t extAddress;
uint8_gfx_image_prog * progByteAddress;
uint16_gfx_image_prog * progWordAddress;
const char * constAddress;
char * ramAddress;
__eds__ char * edsAddress;
} location;
uint16_t width;
uint16_t height;
union {
uint32_t compressedSize;
uint32_t reserved;
} parameter1;
union {
uint32_t rawSize;
uint32_t reserved;
} parameter2;
uint8_t colorDepth;
uint8_t type;
uint16_t paletteID;
} GFX_RESOURCE_IMAGE;
Description
Structure for Graphics Resource - image.
Members
Members Description
uint32_t extAddress; generic address
uint8_gfx_image_prog * progByteAddress; for addresses in program section
uint16_gfx_image_prog *
progWordAddress;
for addresses in program section
const char * constAddress; for addresses in FLASH
char * ramAddress; for addresses in RAM
__eds__ char * edsAddress; for addresses in EDS
uint16_t width; width of the image
uint16_t height; height of the image
uint32_t compressedSize; Parameters used for the GFX_RESOURCE. Depending on the GFX_RESOURCE
type definition of param1 can change. For IPU and RLE compressed images,
param1 indicates the compressed size of the image.
uint32_t rawSize; Parameters used for the GFX_RESOURCE. Depending on the GFX_RESOURCE
type definition of param2 can change. For IPU and RLE compressed images,
param2 indicates the uncompressed size of the image.
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uint8_t colorDepth; color depth of the image
uint8_t type; type of image, information on how to render the image 0x00 - no compression,
palette is present for color depth = 8, 4 and 1 BPP 0x10 - palette is provided as a
separate object (see PALETTE_HEADER) for color depth = 8, 4, and 1 BPP, ID to
the palette is embedded color depth = 8, 4, and 1 BPP, in the bitmap. 0xYY -
reserved
uint16_t paletteID; if type == MCHP_BITMAP_PALETTE_STR (0x10), this represents the unique ID
of the palette being used
5.2.2.7.26.74 GFX_RESOURCE_PALETTE Structure
C
typedef struct {
union {
uint32_t extAddress;
const GFX_PALETTE_ENTRY * constByteAddress;
GFX_PALETTE_ENTRY * ramAddress;
} location;
uint16_t numberOfEntries;
uint16_t paletteID;
} GFX_RESOURCE_PALETTE;
Description
Structure for Graphics Resource - Palette.
Members
Members Description
uint16_t paletteID; Unique ID of the palette that will match the ID in the GFX_RESOURCE_HDR if the
image has palette removed and supplied as a separate object.
5.2.2.7.26.75 GFX_STATUS Enumeration
C
typedef enum {
GFX_STATUS_FAILURE = 0,
GFX_STATUS_SUCCESS = 1
} GFX_STATUS;
Description
Status types for rendering.
5.2.2.7.26.76 GFX_STATUS_BIT Enumeration
C
typedef enum {
GFX_STATUS_FAILURE_BIT = 0,
GFX_STATUS_SUCCESS_BIT = 1,
GFX_STATUS_ERROR_BIT = 2,
GFX_STATUS_BUSY_BIT = 4,
GFX_STATUS_READY_BIT = 8
} GFX_STATUS_BIT;
Description
Bit masks for additional status information.
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5.2.2.7.26.77 GFX_TRANSITION_DIRECTION Enumeration
C
typedef enum {
LEFT_TO_RIGHT = 0,
RIGHT_TO_LEFT,
TOP_TO_BOTTOM,
BOTTOM_TO_TOP,
HORIZONTAL,
VERTICAL
} GFX_TRANSITION_DIRECTION;
Description
Direction enumeration to determine the direction of the selected GFX_TRANSITION_TYPE.
Members
Members Description
LEFT_TO_RIGHT = 0 option used in SLIDE, PUSH transition type (GFX_TRANSITION_TYPE)
RIGHT_TO_LEFT option used in SLIDE, PUSH transition type (GFX_TRANSITION_TYPE)
TOP_TO_BOTTOM option used in SLIDE, PUSH transition type (GFX_TRANSITION_TYPE)
BOTTOM_TO_TOP option used in SLIDE, PUSH transition type (GFX_TRANSITION_TYPE)
HORIZONTAL option used in EXPANDING_LINE and CONTRACTING_LINE transition type
(GFX_TRANSITION_TYPE)
VERTICAL option used in EXPANDING_LINE and CONTRACTING_LINE transition type
(GFX_TRANSITION_TYPE)
5.2.2.7.26.78 GFX_TRANSITION_PARAMS Structure
C
typedef struct {
uint16_t left;
uint16_t top;
uint16_t delay_ms;
uint8_t sourcePage;
uint8_t destinationPage;
uint8_t type;
uint8_t param1;
uint8_t param2;
} GFX_TRANSITION_PARAMS;
Description
GFX transition parameters
Remarks
None.
5.2.2.7.26.79 GFX_TRANSITION_TYPE Enumeration
C
typedef enum {
EXPANDING_RECTANGLE = 0,
CONTRACTING_RECTANGLE,
SLIDE,
PUSH,
EXPANDING_LINE,
CONTRACTING_LINE
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} GFX_TRANSITION_TYPE;
Description
Transition type enumeration to determine the type of the transition. Each type will require specific parameters when setting up
the transition operation (GFXSetupTransition() or GFXTransition()).
GFX_TRANSITION_TYPE param1 param2 (sets the direction of transition)
PLAIN pixel block size not used
EXPANDING_RECTANGLE pixel block size not used
CONTRACTING_RECTANGLE pixel block size not used
SLIDE pixel block size LEFT_TO_RIGHT, RIGHT_TO_LEFT, TOP_TO_BOTTOM,
BOTTOM_TO_TOP
PUSH pixel block size LEFT_TO_RIGHT, RIGHT_TO_LEFT, TOP_TO_BOTTOM,
BOTTOM_TO_TOP
EXPANDING_LINE pixel block size HORIZONTAL, VERTICAL
CONTRACTING_LINE pixel block size HORIZONTAL, VERTICAL
Members
Members Description
EXPANDING_RECTANGLE = 0 param1 -> Pixel-block size
CONTRACTING_RECTANGLE param1 -> Pixel-block size
SLIDE param1 -> Pixel-block size, param2 -> Sliding direction
LEFT_TO_RIGHT/RIGHT_TO_LEFT/TOP_TO_BOTTOM/BOTTOM_TO_TOP
PUSH param1 -> Pixel-block size, param2 -> Sliding direction
LEFT_TO_RIGHT/RIGHT_TO_LEFT/TOP_TO_BOTTOM/BOTTOM_TO_TOP
EXPANDING_LINE param1 -> Pixel-block size, param2 -> direction HORIZONTAL/VERTICAL
CONTRACTING_LINE param1 -> Pixel-block size, param2 -> direction HORIZONTAL/VERTICAL
5.2.2.7.26.80 GFX_TRIG_FUNCTION_TYPE Enumeration
C
typedef enum {
GFX_TRIG_SINE_TYPE = 0,
GFX_TRIG_COSINE_TYPE = 1
} GFX_TRIG_FUNCTION_TYPE;
Description
DOM-IGNORE-START
******************************************************************
• Overview: Graphics Library helper function for trigonometric sine
• cosine angles are defined in a sine/cosine table.
• This type enumeration specifies if the value retrieved
• from that look up table is for a sine(angle) or
• cosine(angle) value.
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5.2.2.7.26.81 GOL_PANEL_PARAM Structure
C
typedef struct {
int16_t panelLeft;
int16_t panelTop;
int16_t panelRight;
int16_t panelBottom;
GFX_COLOR panelFaceColor;
GFX_COLOR panelEmbossLtColor;
GFX_COLOR panelEmbossDkColor;
uint16_t panelEmbossSize;
uint16_t panelRadius;
GFX_RESOURCE_HDR * pPanelImage;
GFX_FILL_STYLE panelFillStyle;
GFX_COLOR panelGradientStartColor;
GFX_COLOR panelGradientEndColor;
uint16_t panelAlpha;
} GOL_PANEL_PARAM;
Description
GOL_PANEL_PARAM
This structure defines the panel parameters when rendering a panel.
Remarks
None.
5.2.2.7.26.82 GRID Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
short numColumns;
short numRows;
short cellHeight;
short cellWidth;
short focusX;
short focusY;
GRIDITEM * gridObjects;
} GRID;
Description
Defines the parameters required for a grid Object. Clipping is not supported in grid object.
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_OBJ_HEADER).
short numColumns; Number of columns drawn for the Grid.
short numRows; Number of rows drawn for the Grid.
short cellHeight; The height of each cell in pixels.
short cellWidth; The width of each cell in pixels.
short focusX; The x position of the cell to be focused.
short focusY; The y position of the cell to be focused.
GRIDITEM * gridObjects; The pointer to grid items
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5.2.2.7.26.83 GRIDITEM Structure
C
typedef struct {
void * data;
uint16_t status;
} GRIDITEM;
Description
Defines the grid item.
Members
Members Description
void * data; Indicates if the Grid Item is type GRIDITEM_IS_TEXT or GRIDITEM_IS_BITMAP
uint16_t status; indicates the status of the Grid Item
5.2.2.7.26.84 IMAGE_STRETCH Enumeration
C
typedef enum {
IMAGE_NORMAL = 1,
IMAGE_X2 = 2
} IMAGE_STRETCH;
Description
GFX image stretch
Remarks
None.
5.2.2.7.26.85 IMG_FILE_FORMAT Type
C
typedef enum _IMG_FILE_FORMAT IMG_FILE_FORMAT;
Description
IMG_ImageFileFormat specifies all the supported image file formats
5.2.2.7.26.86 IMG_FILE_SYSTEM_API Type
C
typedef struct _IMG_FILE_SYSTEM_API IMG_FILE_SYSTEM_API;
Description
IMG_FileSystemAPI holds function pointers to the used File System APIs
5.2.2.7.26.87 IMG_LOOP_CALLBACK Type
C
typedef void (* IMG_LOOP_CALLBACK)(void);
Description
IMG_LoopCallback is a callback function which is called in every loop of the decoding cycle so that user application can do some
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maintainance activities
5.2.2.7.26.88 IMG_PIXEL_OUTPUT Type
C
typedef void (* IMG_PIXEL_OUTPUT)(IMG_PIXEL_XY_RGB_888 *pPix);
Description
IMG_PixelOutput is a callback function which receives the color information of the output pixel
5.2.2.7.26.89 IMG_PIXEL_XY_RGB_888 Type
C
typedef struct _IMG_PIXEL_XY_RGB_888 IMG_PIXEL_XY_RGB_888;
Description
IMG_PixelRgb holds the RGB information of a pixel in BYTES
5.2.2.7.26.90 INPUT_DEVICE_EVENT Enumeration
C
typedef enum {
EVENT_INVALID = 0,
EVENT_MOVE,
EVENT_PRESS,
EVENT_STILLPRESS,
EVENT_RELEASE,
EVENT_KEYSCAN,
EVENT_CHARCODE,
EVENT_SET,
EVENT_SET_STATE,
EVENT_CLR_STATE
} INPUT_DEVICE_EVENT;
Description
INPUT_DEVICE_EVENT
This enumeration specifies the different user input device events supported in the library.
Members
Members Description
EVENT_INVALID = 0 An invalid event.
EVENT_MOVE A move event.
EVENT_PRESS A press event.
EVENT_STILLPRESS A continuous press event.
EVENT_RELEASE A release event.
EVENT_KEYSCAN A keyscan event, parameters has the object ID keyboard scan code.
EVENT_CHARCODE Character code is presented at the parameters.
EVENT_SET A generic set event.
EVENT_SET_STATE A set state event.
EVENT_CLR_STATE A clear state event.
Remarks
None.
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5.2.2.7.26.91 INPUT_DEVICE_TYPE Enumeration
C
typedef enum {
TYPE_UNKNOWN = 0,
TYPE_KEYBOARD,
TYPE_TOUCHSCREEN,
TYPE_MOUSE,
TYPE_TIMER,
TYPE_SYSTEM
} INPUT_DEVICE_TYPE;
Description
INPUT_DEVICE_TYPE
This enumeration specifies the different user input devices supported in the library.
Members
Members Description
TYPE_UNKNOWN = 0 Unknown device.
TYPE_KEYBOARD Keyboard.
TYPE_TOUCHSCREEN Touchscreen.
TYPE_MOUSE Mouse.
TYPE_TIMER Timer.
TYPE_SYSTEM System Messages.
Remarks
None.
5.2.2.7.26.92 int16_gfx_image_prog Type
C
typedef int16_prog_pack int16_gfx_image_prog;
Description
This is type int16_gfx_image_prog.
5.2.2.7.26.93 int16_prog Type
C
typedef __prog__ int16_t int16_prog;
Description
This is type int16_prog.
5.2.2.7.26.94 int16_prog_pack Type
C
typedef __pack_upper_byte int16_t int16_prog_pack;
Description
This is type int16_prog_pack.
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5.2.2.7.26.95 int32_gfx_image_prog Type
C
typedef int32_prog_pack int32_gfx_image_prog;
Description
This is type int32_gfx_image_prog.
5.2.2.7.26.96 int32_prog Type
C
typedef __prog__ int32_t int32_prog;
Description
This is type int32_prog.
5.2.2.7.26.97 int32_prog_pack Type
C
typedef __pack_upper_byte int32_t int32_prog_pack;
Description
This is type int32_prog_pack.
5.2.2.7.26.98 int8_gfx_image_prog Type
C
typedef int8_prog_pack int8_gfx_image_prog;
Description
This is type int8_gfx_image_prog.
5.2.2.7.26.99 int8_prog Type
C
typedef __prog__ int8_t int8_prog;
Description
This is type int8_prog.
5.2.2.7.26.100 int8_prog_pack Type
C
typedef __pack_upper_byte int8_t int8_prog_pack;
Description
This is type int8_prog_pack.
5.2.2.7.26.101 KEYMEMBER Structure
C
typedef struct {
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uint16_t left;
uint16_t top;
uint16_t right;
uint16_t bottom;
uint16_t index;
uint16_t state;
bool update;
GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE command;
GFX_XCHAR * pKeyName;
int16_t textWidth;
int16_t textHeight;
void * pNextKey;
} KEYMEMBER;
Description
Defines the parameters and the strings assigned for each key.
Members
Members Description
uint16_t left; Left position of the key
uint16_t top; Top position of the key
uint16_t right; Right position of the key
uint16_t bottom; Bottom position of the key
uint16_t index; Index of the key in the list
uint16_t state; State of the key. Either Pressed
(GFX_GOL_TEXTENTRY_KEY_PRESSED_STATE) or Released (0)
bool update; flag to indicate key is to be redrawn with the current state
GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE
command;
Command of the key. Either TE_DELETE_COM, TE_SPACE_COM or
TE_ENTER_COM.
GFX_XCHAR * pKeyName; Pointer to the custom text assigned to the key. This is displayed over the
face of the key.
int16_t textWidth; Computed text width, done at creation. Used to predict size and position of
text on the key face.
int16_t textHeight; Computed text height, done at creation. Used to predict size and position
of text on the key face.
void * pNextKey; Pointer to the next key parameters.
5.2.2.7.26.102 LAYER_ACTIONS Enumeration
C
typedef enum {
ENABLE = 0x80,
DISABLE = 0,
UPDATE,
SET_SIZE,
SET_PAGE,
SET_PAGE_START,
SET_LAYER_START
} LAYER_ACTIONS;
Description
GFX layering actions
Remarks
None.
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5.2.2.7.26.103 PALETTE_ENTRY Union
C
typedef union {
uint16_t value;
struct {
uint16_t r : 5;
uint16_t g : 6;
uint16_t b : 5;
} color;
struct {
uint16_t reserved : 12;
uint16_t luma : 4;
} monochrome;
} PALETTE_ENTRY;
Description
Structure used for the palette entries.
• For TFT: color is defined as 5-6-5 RGB format (5-bits for RED, 6-bits for GREEN and 5-bits for BLUE.
• For Monochrome: 4 bits are used to represent the luma.
Members
Members Description
uint16_t value; a 16-bit value representing a color or palette entry
struct {
uint16_t r : 5;
uint16_t g : 6;
uint16_t b : 5;
} color;
color value in 5-6-5 RGB format
uint16_t r : 5; represents the RED component
uint16_t g : 6; represents the GREEN component
uint16_t b : 5; represents the BLUE component
struct {
uint16_t reserved : 12;
uint16_t luma : 4;
} monochrome;
monochrome LUMA value
uint16_t reserved : 12; reserved, used as a filler
uint16_t luma : 4; monochrome LUMA value
5.2.2.7.26.104 PALETTE_EXTERNAL Type
C
typedef GFX_EXTDATA PALETTE_EXTERNAL;
Description
Structure for palette stored in EXTERNAL memory space. (example: External SPI or parallel Flash, EDS_EPMP)
5.2.2.7.26.105 PALETTE_FLASH Structure
C
typedef struct {
short type;
PALETTE_HEADER header;
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PALETTE_ENTRY * pPaletteEntry;
} PALETTE_FLASH;
Description
Structure for the palette stored in FLASH memory.
Members
Members Description
short type; Type must be FLASH
PALETTE_HEADER header; Contains information on the palette
PALETTE_ENTRY * pPaletteEntry; Pointer to the palette. Number of entries is determined by the header.
5.2.2.7.26.106 PALETTE_HEADER Structure
C
typedef struct {
uint16_t id;
uint16_t length;
} PALETTE_HEADER;
Description
Structure for the palette header.
Members
Members Description
uint16_t id; User defined ID
uint16_t length; number of palette entries (number of colors in the palette)
5.2.2.7.26.107 PUTIMAGE_PARAM Structure
C
typedef struct {
uint16_t width;
uint16_t height;
uint16_t xoffset;
uint16_t yoffset;
IMAGE_STRETCH stretch;
uint8_t transparentFlag;
GFX_COLOR transparentColor;
uint8_gfx_image_prog* image;
GFX_COLOR palette[256];
} PUTIMAGE_PARAM;
Description
GFX put image param
Members
Members Description
uint16_t width; Parital Image width
uint16_t height; Partial Image height
uint16_t xoffset; xoffset of image
uint16_t yoffset; yoffset of image
IMAGE_STRETCH stretch; stretch of the image
uint8_t transparentFlag; transparent Color flag
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GFX_COLOR transparentColor; transparent Color
uint8_gfx_image_prog* image; pointer to the image
GFX_COLOR palette[256]; palette used for <8BPP images
Remarks
None.
5.2.2.7.26.108 uint16_gfx_image_prog Type
C
typedef uint16_prog_pack uint16_gfx_image_prog;
Description
This is type uint16_gfx_image_prog.
5.2.2.7.26.109 uint16_prog Type
C
typedef __prog__ uint16_t uint16_prog;
Description
This is type uint16_prog.
5.2.2.7.26.110 uint16_prog_pack Type
C
typedef __pack_upper_byte uint16_t uint16_prog_pack;
Description
This is type uint16_prog_pack.
5.2.2.7.26.111 uint32_gfx_image_prog Type
C
typedef uint32_prog_pack uint32_gfx_image_prog;
Description
This is type uint32_gfx_image_prog.
5.2.2.7.26.112 uint32_prog Type
C
typedef __prog__ uint32_t uint32_prog;
Description
This is type uint32_prog.
5.2.2.7.26.113 uint32_prog_pack Type
C
typedef __pack_upper_byte uint32_t uint32_prog_pack;
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Description
This is type uint32_prog_pack.
5.2.2.7.26.114 uint8_gfx_image_prog Type
C
typedef uint8_prog_pack uint8_gfx_image_prog;
Description
GFX Image data Types
5.2.2.7.26.115 uint8_prog Type
C
typedef __prog__ uint8_t uint8_prog;
Description
General program space data types
5.2.2.7.26.116 uint8_prog_pack Type
C
typedef __pack_upper_byte uint8_t uint8_prog_pack;
Description
This is type uint8_prog_pack.
5.2.2.7.26.117 BLACK Macro
C
#define BLACK GFX_RGBConvert(0, 0, 0)
Description
This is macro BLACK.
5.2.2.7.26.118 BLUE Macro
C
#define BLUE GFX_RGBConvert(0, 0, 128)
Description
This is macro BLUE.
5.2.2.7.26.119 BRIGHTBLUE Macro
C
#define BRIGHTBLUE GFX_RGBConvert(0, 0, 255)
Description
This is macro BRIGHTBLUE.
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5.2.2.7.26.120 BRIGHTCYAN Macro
C
#define BRIGHTCYAN GFX_RGBConvert(0, 255, 255)
Description
This is macro BRIGHTCYAN.
5.2.2.7.26.121 BRIGHTGREEN Macro
C
#define BRIGHTGREEN GFX_RGBConvert(0, 255, 0)
Description
This is macro BRIGHTGREEN.
5.2.2.7.26.122 BRIGHTMAGENTA Macro
C
#define BRIGHTMAGENTA GFX_RGBConvert(255, 0, 255)
Description
This is macro BRIGHTMAGENTA.
5.2.2.7.26.123 BRIGHTRED Macro
C
#define BRIGHTRED GFX_RGBConvert(255, 0, 0)
Description
This is macro BRIGHTRED.
5.2.2.7.26.124 BRIGHTYELLOW Macro
C
#define BRIGHTYELLOW GFX_RGBConvert(255, 255, 0)
Description
This is macro BRIGHTYELLOW.
5.2.2.7.26.125 BROWN Macro
C
#define BROWN GFX_RGBConvert(255, 128, 0)
Description
This is macro BROWN.
5.2.2.7.26.126 BURLYWOOD Macro
C
#define BURLYWOOD GFX_RGBConvert(222, 184, 135)
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Description
This is macro BURLYWOOD.
5.2.2.7.26.127 CH_CLR0 Macro
C
#define CH_CLR0 WHITE()
Description
Bright Blue
5.2.2.7.26.128 CH_CLR1 Macro
C
#define CH_CLR1 BLACK()
Description
Bright Red
5.2.2.7.26.129 CH_CLR10 Macro
C
#define CH_CLR10 WHITE()
Description
Light Blur
5.2.2.7.26.130 CH_CLR11 Macro
C
#define CH_CLR11 BLACK()
Description
Light Red
5.2.2.7.26.131 CH_CLR12 Macro
C
#define CH_CLR12 WHITE()
Description
Light Green
5.2.2.7.26.132 CH_CLR13 Macro
C
#define CH_CLR13 BLACK()
Description
Light Yellow
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5.2.2.7.26.133 CH_CLR14 Macro
C
#define CH_CLR14 WHITE()
Description
Light Orange
5.2.2.7.26.134 CH_CLR15 Macro
C
#define CH_CLR15 BLACK()
Description
Gold
5.2.2.7.26.135 CH_CLR2 Macro
C
#define CH_CLR2 WHITE()
Description
Bright Green
5.2.2.7.26.136 CH_CLR3 Macro
C
#define CH_CLR3 BLACK()
Description
Bright Yellow
5.2.2.7.26.137 CH_CLR4 Macro
C
#define CH_CLR4 WHITE()
Description
Orange
5.2.2.7.26.138 CH_CLR5 Macro
C
#define CH_CLR5 BLACK()
Description
Blue
5.2.2.7.26.139 CH_CLR6 Macro
C
#define CH_CLR6 WHITE()
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Description
Red
5.2.2.7.26.140 CH_CLR7 Macro
C
#define CH_CLR7 BLACK()
Description
Green
5.2.2.7.26.141 CH_CLR8 Macro
C
#define CH_CLR8 WHITE()
Description
Yellow
5.2.2.7.26.142 CH_CLR9 Macro
C
#define CH_CLR9 BLACK()
Description
Dark Orange
5.2.2.7.26.143 CHART_MARGIN Macro
C
#define CHART_MARGIN 2 // Margin from the edges.
Description
Margin from the edges.
5.2.2.7.26.144 CHART_YGRIDCOUNT Macro
C
#define CHART_YGRIDCOUNT 6 // defines the number of grids to be drawn on the y-axis
(includes the origin at y).
Description
defines the number of grids to be drawn on the y-axis (includes the origin at y).
5.2.2.7.26.145 ConvertColor25 Macro
C
#define ConvertColor25(color) (GFX_COLOR)((color & (0x00FCFCFCul))>>2)
Description
This is macro ConvertColor25.
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5.2.2.7.26.146 ConvertColor50 Macro
C
#define ConvertColor50(color) (GFX_COLOR)((color & (0x00FEFEFEul))>>1)
Description
75, 50, 25 percentage color conversion macros. Used in converting colors to these percentages when performing alpha blending
of colors using software alpha blending operation.
5.2.2.7.26.147 ConvertColor75 Macro
C
#define ConvertColor75(color) (GFX_COLOR)(ConvertColor50(color) + ConvertColor25(color))
Description
This is macro ConvertColor75.
5.2.2.7.26.148 CopyPageWindow Macro
C
#define CopyPageWindow(alphaArea, width, height) \
GFX_AlphaBlendWindow(alphaArea,width,height,100)
Description
None
Preconditions
None
Parameters
Parameters Description
None None
Returns
None
Example
None
5.2.2.7.26.149 CYAN Macro
C
#define CYAN GFX_RGBConvert(0, 128, 128)
Description
This is macro CYAN.
5.2.2.7.26.150 DARKGRAY Macro
C
#define DARKGRAY GFX_RGBConvert(64, 64, 64)
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Description
This is macro DARKGRAY.
5.2.2.7.26.151 DARKORANGE Macro
C
#define DARKORANGE GFX_RGBConvert(255, 140, 0)
Description
This is macro DARKORANGE.
5.2.2.7.26.152 GFX_ActivePageGet Macro
C
#define GFX_ActivePageGet GFX_Primitive_instance.activePage
Preconditions
None.
Returns
None.
Example
Remarks:
5.2.2.7.26.153 GFX_AlphaParamsSet Macro
C
#define GFX_AlphaParamsSet(fArea,fLeft,fTop,bArea,bLeft,bTop,dArea,dLeft,dTop) \
GFX_Primitive_instance.alphaArea.foregroundPage
= fArea;\
GFX_Primitive_instance.alphaArea.foregroundLeft
= fLeft;\
GFX_Primitive_instance.alphaArea.foregroundTop
= fTop;\
GFX_Primitive_instance.alphaArea.backgroundPage
= bArea;\
GFX_Primitive_instance.alphaArea.backgroundLeft
= bLeft;\
GFX_Primitive_instance.alphaArea.backgroundTop
= bTop;\
GFX_Primitive_instance.alphaArea.destinationPag
e
= dArea;\
GFX_Primitive_instance.alphaArea.destinationLef
t
= dLeft;\
GFX_Primitive_instance.alphaArea.destinationTop
= dTop
Description
None
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Preconditions
None
Parameters
Parameters Description
None None
Returns
None
Example
None
5.2.2.7.26.154 GFX_BUFFER1 Macro
C
#define GFX_BUFFER1 (0)
Description
This is macro GFX_BUFFER1.
5.2.2.7.26.155 GFX_BUFFER2 Macro
C
#define GFX_BUFFER2 (1)
Description
This is macro GFX_BUFFER2.
5.2.2.7.26.156 GFX_COMP_MASK Macro
C
#define GFX_COMP_MASK 0xF000
Description
This is macro GFX_COMP_MASK.
5.2.2.7.26.157 GFX_CONFIG_OBJECT_METER_DEGREECOUNT Macro
C
#define GFX_CONFIG_OBJECT_METER_DEGREECOUNT 9
Description
This is a Meter compile time option to define how many degrees per scale, computed per octant
Example
for 5 division per octant 45/5 = 9. So every 9 degrees a scale is drawn for a 5 scale division per octant.
5.2.2.7.26.158 GFX_CONFIG_OBJECT_METER_RESOLUTION Macro
C
#define GFX_CONFIG_OBJECT_METER_RESOLUTION 10
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Description
This is a Meter compile time option to define the factor that the meter widget will divide minValue, maxValue
5.2.2.7.26.159 GFX_CONFIG_OBJECT_METER_SCALE_COUNT Macro
C
#define GFX_CONFIG_OBJECT_METER_SCALE_COUNT 4
Description
This is a Meter compile time option to define how many characters will be allocated for the scale labels. Use this define in
accordance to the maxValue-minValue.
Example
if maxValue-minValue = 500, SCALECHARCOUNT should be 3. if maxValue-minValue = 90, SCALECHARCOUNT = 2 You
must include the decimal point if this feature is enabled (see MTR_ACCURACY state bit).
5.2.2.7.26.160 GFX_FONT_SPACE Macro
C
#define GFX_FONT_SPACE const
Description
Font space section. The fonts can be located in psv (constant) or program space in PIC24/dsPIC MCUs. This define allows for
switching of the pointer type used to access the font structure in memory See: GraphicsConfig.h for the application define.
5.2.2.7.26.161 GFX_FontAlignmentSet Macro
C
#define GFX_FontAlignmentSet(align) GFX_Primitive_instance.currentFont.alignment = align;
Description
• 1 when font orientation is vertical
• 0 when font orientation is horizontal
Preconditions
None.
Returns
None.
Example
5.2.2.7.26.162 GFX_GOL_ANALOGCLOCK_DISABLED Macro
C
#define GFX_GOL_ANALOGCLOCK_DISABLED 0x0002 // Bit for disabled state.
Description
Bit for disabled state.
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5.2.2.7.26.163 GFX_GOL_ANALOGCLOCK_DRAW Macro
C
#define GFX_GOL_ANALOGCLOCK_DRAW 0x4000 // Bit to indicate button must be redrawn.
Description
Bit to indicate button must be redrawn.
5.2.2.7.26.164 GFX_GOL_ANALOGCLOCK_HIDE Macro
C
#define GFX_GOL_ANALOGCLOCK_HIDE 0x8000 // Bit to indicate button must be removed from
screen.
Description
Bit to indicate button must be removed from screen.
5.2.2.7.26.165 GFX_GOL_ANALOGCLOCK_PRESSED Macro
C
#define GFX_GOL_ANALOGCLOCK_PRESSED 0x0004 // Bit for press state.
Description
Bit for press state.
5.2.2.7.26.166 GFX_GOL_ANALOGCLOCK_TICK Macro
C
#define GFX_GOL_ANALOGCLOCK_TICK 0x1000 // Bit to tick second hand
Description
Bit to tick second hand
5.2.2.7.26.167 GFX_GOL_ANALOGCLOCK_UPDATE_HOUR Macro
C
#define GFX_GOL_ANALOGCLOCK_UPDATE_HOUR 0x2000 // Bit to indicate hour hand must be redrawn
Description
Bit to indicate hour hand must be redrawn
5.2.2.7.26.168 GFX_GOL_ANALOGCLOCK_UPDATE_MINUTE Macro
C
#define GFX_GOL_ANALOGCLOCK_UPDATE_MINUTE 0x0100 // Bit to indicate minute hand must be
redrawn
Description
Bit to indicate minute hand must be redrawn
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5.2.2.7.26.169 GFX_GOL_ANALOGCLOCK_UPDATE_SECOND Macro
C
#define GFX_GOL_ANALOGCLOCK_UPDATE_SECOND 0x0200 // Bit to indicate minute hand must be
redrawn
Description
Bit to indicate minute hand must be redrawn
5.2.2.7.26.170 GFX_GOL_ButtonPressStateImageGet Macro
C
#define GFX_GOL_ButtonPressStateImageGet(pObject, pImage) \
(((GFX_GOL_BUTTON *)pObject)->pPressImage)
Description
This function gets the image used when in the pressed state.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to the image resource.
Example
None.
5.2.2.7.26.171 GFX_GOL_ButtonPressStateImageSet Macro
C
#define GFX_GOL_ButtonPressStateImageSet(pObject, pImage) \
(((GFX_GOL_BUTTON *)pObject)->pPressImage = pImage)
Description
This function sets the image to be used when in the pressed state.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pImage pointer to the image resource.
Returns
None.
Example
// assume ImageIcon is a valid GFX_RESOURCE_HDR
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GFX_RESOURCE_HDR *pMyIcon = &ImageIcon;
GFX_GOL_BUTTON *pButton;
GFX_GOL_ButtonPressStateImageSet(pButton , pMyIcon);
5.2.2.7.26.172 GFX_GOL_ButtonReleaseStateImageGet Macro
C
#define GFX_GOL_ButtonReleaseStateImageGet(pObject, pImage) \
(((GFX_GOL_BUTTON *)pObject)->pReleaseImage)
Description
This function gets the image used when in the released state.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to the image resource.
Example
None.
5.2.2.7.26.173 GFX_GOL_ButtonReleaseStateImageSet Macro
C
#define GFX_GOL_ButtonReleaseStateImageSet(pObject, pImage) \
(((GFX_GOL_BUTTON *)pObject)->pReleaseImage = pImage)
Description
This function sets the image to be used when in the released state.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pImage pointer to the image resource.
Returns
None.
Example
// assume ImageIcon is a valid GFX_RESOURCE_HDR
GFX_RESOURCE_HDR *pMyIcon = &ImageIcon;
GFX_GOL_BUTTON *pButton;
GFX_GOL_ButtonReleaseStateImageSet(pButton , pMyIcon);
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5.2.2.7.26.174 GFX_GOL_ButtonTextGet Macro
C
#define GFX_GOL_ButtonTextGet(pObject) (((GFX_GOL_BUTTON *)pObject)->pText)
Description
This function returns the address of the current text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to text string.
Example
GFX_XCHAR *pChar;
GFX_GOL_BUTTON GFX_GOL_BUTTON[2];
pChar = GFX_GOL_ButtonTextGet(GFX_GOL_BUTTON[0]);
5.2.2.7.26.175 GFX_GOL_CHART_3D_ENABLE Macro
C
#define GFX_GOL_CHART_3D_ENABLE 0x0008 // Bit to indicate that bar charts are to be drawn
with 3-D effect
Description
Bit to indicate that bar charts are to be drawn with 3-D effect
5.2.2.7.26.176 GFX_GOL_CHART_BAR Macro
C
#define GFX_GOL_CHART_BAR 0x0200 // Bit to indicate the chart is type bar. If both PIE
and BAR types are set BAR type has higher priority.
Description
Bit to indicate the chart is type bar. If both PIE and BAR types are set BAR type has higher priority.
5.2.2.7.26.177 GFX_GOL_CHART_BAR_HOR Macro
C
#define GFX_GOL_CHART_BAR_HOR 0x0240 // These bits (with CH_BAR bit set), sets the bar
chart to be drawn horizontally.
Description
These bits (with CH_BAR bit set), sets the bar chart to be drawn horizontally.
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5.2.2.7.26.178 GFX_GOL_CHART_DISABLED Macro
C
#define GFX_GOL_CHART_DISABLED 0x0002 // Bit for disabled state.
Description
Bit for disabled state.
5.2.2.7.26.179 GFX_GOL_CHART_DONUT Macro
C
#define GFX_GOL_CHART_DONUT 0x0140 // These bits (with CH_PIE bit set), sets the pie
chart to be drawn in a donut shape.
Description
These bits (with CH_PIE bit set), sets the pie chart to be drawn in a donut shape.
5.2.2.7.26.180 GFX_GOL_CHART_DRAW Macro
C
#define GFX_GOL_CHART_DRAW 0x4000 // Bit to indicate chart must be redrawn.
Description
Bit to indicate chart must be redrawn.
5.2.2.7.26.181 GFX_GOL_CHART_DRAW_DATA Macro
C
#define GFX_GOL_CHART_DRAW_DATA 0x2000 // Bit to indicate data portion of the chart must
be redrawn.
Description
Bit to indicate data portion of the chart must be redrawn.
5.2.2.7.26.182 GFX_GOL_CHART_HIDE Macro
C
#define GFX_GOL_CHART_HIDE 0x8000 // Bit to indicate chart must be removed from screen.
Description
Bit to indicate chart must be removed from screen.
5.2.2.7.26.183 GFX_GOL_CHART_LEGEND Macro
C
#define GFX_GOL_CHART_LEGEND 0x0001 // Bit to indicate that legend is to be shown. Usable
only when seriesCount > 1.
Description
Bit to indicate that legend is to be shown. Usable only when seriesCount > 1.
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5.2.2.7.26.184 GFX_GOL_CHART_NUMERIC Macro
C
#define GFX_GOL_CHART_NUMERIC 0x0080 // This bit is used only for bar charts. If this bit
is set, it indicates that the
Description
This bit is used only for bar charts. If this bit is set, it indicates that the bar chart labels for variables are numeric. If this bit is not
set, it indicates that the bar chart labels for variables are alphabets.
5.2.2.7.26.185 GFX_GOL_CHART_PERCENT Macro
C
#define GFX_GOL_CHART_PERCENT 0x0010 // Bit to indicate that the pie chart will be drawn
with percentage values shown for the sample data.
Description
Bit to indicate that the pie chart will be drawn with percentage values shown for the sample data. For bar chart, if CH_VALUE is
set, it toggles the value shown to percentage.
5.2.2.7.26.186 GFX_GOL_CHART_PIE Macro
C
#define GFX_GOL_CHART_PIE 0x0100 // Bit to indicate the chart is type pie. If both PIE
and BAR types are set BAR type has higher priority.
Description
Bit to indicate the chart is type pie. If both PIE and BAR types are set BAR type has higher priority.
5.2.2.7.26.187 GFX_GOL_CHART_VALUE Macro
C
#define GFX_GOL_CHART_VALUE 0x0004 // Bit to indicate that the values of the bar chart
data or pie chart data are to be shown
Description
Bit to indicate that the values of the bar chart data or pie chart data are to be shown
5.2.2.7.26.188 GFX_GOL_ChartAxisLabelFontGet Macro
C
#define GFX_GOL_ChartAxisLabelFontGet(pCh) (((GFX_GOL_CHART *)pCh)->prm.pAxisLabelsFont)
Description
Macros: GFX_GOL_ChartAxisLabelFontGet(pCh)
This macro returns the location of the font used for the X and Y axis labels of the chart.
Preconditions
none
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Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the address of the current font used for the title text.
Side Effects
none
5.2.2.7.26.189 GFX_GOL_ChartAxisLabelFontSet Macro
C
#define GFX_GOL_ChartAxisLabelFontSet(pCh, pNewFont) (((GFX_GOL_CHART
*)pCh)->prm.pAxisLabelsFont = pNewFont)
Description
Macros: GFX_GOL_ChartAxisLabelFontSet(pCh, pNewFont)
This macro sets the location of the font used for the X and Y axis labels of the chart.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
pNewFont Pointer to the font used.
Returns
none.
Side Effects
none
Example
See ChCreate() example.
5.2.2.7.26.190 GFX_GOL_ChartColorTableGet Macro
C
#define GFX_GOL_ChartColorTableGet(pCh) (((GFX_GOL_CHART *)pCh)->prm.pColor)
Description
Macros: GFX_GOL_ChartColorTableGet(pCh)
This macro returns the current color table used for the pie and bar charts.
Preconditions
none
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Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the address of the color table used.
Side Effects
none
5.2.2.7.26.191 GFX_GOL_ChartColorTableSet Macro
C
#define GFX_GOL_ChartColorTableSet(pCh, pNewTable) ((((GFX_GOL_CHART *)pCh)->prm.pColor) =
pNewTable)
Description
Macros: GFX_GOL_ChartColorTableSet(pCh, pNewTable)
This macro sets the color table used to draw the data in pie and bar charts.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
pNewTable Pointer to the color table that will be used.
Returns
none.
Side Effects
none
5.2.2.7.26.192 GFX_GOL_ChartGridLabelFontGet Macro
C
#define GFX_GOL_ChartGridLabelFontGet(pCh) (((GFX_GOL_CHART *)pCh)->prm.pGridLabelsFont)
Description
Macros: GFX_GOL_ChartGridLabelFontGet(pCh)
This macro returns the location of the font used for the X and Y axis grid labels of the chart.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
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Returns
Returns the address of the current font used for the title text.
Side Effects
none
5.2.2.7.26.193 GFX_GOL_ChartGridLabelFontSet Macro
C
#define GFX_GOL_ChartGridLabelFontSet(pCh, pNewFont) (((GFX_GOL_CHART
*)pCh)->prm.pGridLabelsFont = pNewFont)
Description
Macros: GFX_GOL_ChartGridLabelFontSet(pCh, pNewFont)
This macro sets the location of the font used for the X and Y axis grid labels of the chart.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
pNewFont Pointer to the font used.
Returns
none.
Side Effects
none
Example
See ChCreate() example.
5.2.2.7.26.194 GFX_GOL_ChartPercentMaxGet Macro
C
#define GFX_GOL_ChartPercentMaxGet(pCh) (pCh->prm.perMax)
Description
Macros: ChGetPercentMax(pCh)
This macro returns the current maximum value of the percentage range that will be drawn for bar charts when
CH_PERCENTAGE bit state is set.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
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Returns
Returns the maximum percentage value set when bar charts are drawn.
Side Effects
none
5.2.2.7.26.195 GFX_GOL_ChartPercentMinGet Macro
C
#define GFX_GOL_ChartPercentMinGet(pCh) (pCh->prm.perMin)
Description
Macros: ChGetPercentMin(pCh)
This macro returns the current minimum value of the percentage range that will be drawn for bar charts when
CH_PERCENTAGE bit state is set.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the minimum percentage value when bar charts are drawn.
Side Effects
none
5.2.2.7.26.196 GFX_GOL_ChartPercentRangeGet Macro
C
#define GFX_GOL_ChartPercentRangeGet(pCh) (pCh->prm.perMax - pCh->prm.perMin)
Description
This macro gets the percentage range for bar charts. The value returned is calculated from percentage max - min. To get the
minimum use ChGetPercentMin() and to get the maximum use ChGetPercentMax().
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the chart object.
Returns
Percentage range computed from max-min.
Side Effects
none.
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5.2.2.7.26.197 GFX_GOL_ChartSampleEndGet Macro
C
#define GFX_GOL_ChartSampleEndGet(pCh) ((GFX_GOL_CHART *)pCh)->prm.smplEnd
Description
Macros: GFX_GOL_ChartSampleEndGet(pCh)
This macro returns the sampling end value.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the sample end point.
Side Effects
none
5.2.2.7.26.198 GFX_GOL_ChartSampleLabelGet Macro
C
#define GFX_GOL_ChartSampleLabelGet(pCh) (((GFX_GOL_CHART *)pCh)->prm.pSmplLabel)
Description
Macros: GFX_GOL_ChartSampleLabelGet(pCh)
This macro returns the address of the current text string used for the sample axis label of the bar chart.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the pointer to the current sample axis label text of the bar chart.
Side Effects
none
5.2.2.7.26.199 GFX_GOL_ChartSampleLabelSet Macro
C
#define GFX_GOL_ChartSampleLabelSet(pCh, pNewXLabel) (((GFX_GOL_CHART *)pCh)->prm.pSmplLabel =
pNewXLabel)
Description
Macros: GFX_GOL_ChartSampleLabelSet(pCh, pNewXLabel)
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This macro sets the address of the current text string used for the sample axis label of the bar chart.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
pNewXLabel pointer to the string to be used as an sample axis label of the bar chart.
Returns
none.
Side Effects
none
Example
See ChCreate() example.
5.2.2.7.26.200 GFX_GOL_ChartSampleRangeGet Macro
C
#define GFX_GOL_ChartSampleRangeGet(pCh) (GFX_GOL_ChartSampleEndGet(pCh) -
GFX_GOL_ChartSampleStartGet(pCh))
Description
This macro gets the sample range for pie or bar charts. The value returned is calculated from smplEnd - smplStart.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the chart object.
Returns
Sample range computed from smplEnd - smplStart.
Side Effects
none.
5.2.2.7.26.201 GFX_GOL_ChartSampleStartGet Macro
C
#define GFX_GOL_ChartSampleStartGet(pCh) (((GFX_GOL_CHART *)pCh)->prm.smplStart)
Description
Macros: GFX_GOL_ChartSampleStartGet(pCh)
This macro returns the sampling start value.
Preconditions
none
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Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the sample start point.
Side Effects
none
5.2.2.7.26.202 GFX_GOL_ChartSeriesHide Macro
C
#define GFX_GOL_ChartSeriesHide(pCh, seriesNum) (GFX_GOL_ChartDataSeriesSet(pCh, seriesNum,
HIDE_DATA))
Description
Macros: GFX_GOL_ChartSeriesHide(CHART *pCh, uint16_t seriesNum)
This macro sets the specified data series number show flag to be set to HIDE_DATA.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the chart object.
seriesNum The data series number that will be modified. If this number is zero, all the entries'
flag in the list will be set to HIDE_DATA.
Returns
Returns the same passed number if successful otherwise -1 if unsuccesful.
Side Effects
none
Example
See ChShowSeries() example.
5.2.2.7.26.203 GFX_GOL_ChartShowSeriesCountGet Macro
C
#define GFX_GOL_ChartShowSeriesCountGet(pCh) (pCh->prm.seriesCount)
Description
Macros: GFX_GOL_ChartShowSeriesCountGet(pCh)
This macro shows the number of data series that has its show flag set to SHOW_DATA
Preconditions
none
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Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the number of data series with its show flag set to SHOW_DATA.
Side Effects
none
5.2.2.7.26.204 GFX_GOL_ChartShowSeriesSet Macro
C
#define GFX_GOL_ChartShowSeriesSet(pCh, seriesNum) (GFX_GOL_ChartDataSeriesSet(pCh, seriesNum,
SHOW_DATA))
Description
Macros: short GFX_GOL_ChartShowSeriesSet(CHART *pCh, uint16_t seriesNum)
This macro sets the specified data series number show flag to be set to SHOW_DATA.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the chart object.
seriesNum The data series number that will be modified. If this number is zero, all the entries'
flag in the list will be set to SHOW_DATA.
Returns
Returns the same passed number if successful otherwise -1 if unsuccesful.
Side Effects
none
Example
// from the example in ChCreate() we change the items to be shown when
// GFX_OBJ_Draw() is called.
// reset all data series to be HIDE_DATA
ChHideSeries(pMyChart, 0);
// set data series 1 (V1Data) to be shown
ChShowSeries(pMyChart, 1);
// draw the chart
GFX_OBJ_Draw();
.....
*
5.2.2.7.26.205 GFX_GOL_ChartShowSeriesStatusGet Macro
C
#define GFX_GOL_ChartShowSeriesStatusGet(pDSeries) (pDSeries->show)
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Description
Macros: GFX_GOL_ChartShowSeriesStatusGet(pDSeries)
This macro returns the show ID status of the DATASERIES.
Preconditions
none
Parameters
Parameters Description
pDSeries Pointer to the data series(DATASERIES) that is being checked.
Returns
Returns the status of the show flag. 1 - (SHOW_DATA) means that the show status flag is set. 0 - (HIDE_DATA) means that the
show status flag is not set.
Side Effects
none
5.2.2.7.26.206 GFX_GOL_ChartTitleFontGet Macro
C
#define GFX_GOL_ChartTitleFontGet(pCh) (((GFX_GOL_CHART *)pCh)->prm.pTitleFont)
Description
Macros: GFX_GOL_ChartTitleFontGet(pCh)
This macro returns the location of the font used for the title of the chart.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the address of the current font used for the title text.
Side Effects
none
5.2.2.7.26.207 GFX_GOL_ChartTitleFontSet Macro
C
#define GFX_GOL_ChartTitleFontSet(pCh, pNewFont) (((GFX_GOL_CHART *)pCh)->prm.pTitleFont =
pNewFont)
Description
Macros: GFX_GOL_ChartTitleFontSet(pCh, pNewFont)
This macro sets the location of the font used for the title of the chart.
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Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
pNewFont Pointer to the font used.
Returns
none.
Side Effects
none
Example
See ChCreate() example.
5.2.2.7.26.208 GFX_GOL_ChartTitleGet Macro
C
#define GFX_GOL_ChartTitleGet(pCh) (((GFX_GOL_CHART *)pCh)->prm.pTitle)
Description
Macros: GFX_GOL_ChartTitleGet(pCh)
This macro returns the address of the current text string used for the title of the chart.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the pointer to the current title text used.
Side Effects
none
5.2.2.7.26.209 GFX_GOL_ChartTitleSet Macro
C
#define GFX_GOL_ChartTitleSet(pCh, pNewTitle) (((GFX_GOL_CHART *)pCh)->prm.pTitle = pNewTitle)
Description
Macros: GFX_GOL_ChartTitleSet(pCh, pNewTitle)
This macro sets the address of the current text string used for the title of the chart.
Preconditions
none
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Parameters
Parameters Description
pCh Pointer to the object.
pNewTitle pointer to the string to be used as a title of the chart.
Returns
none.
Side Effects
none
Example
See ChCreate() example.
5.2.2.7.26.210 GFX_GOL_ChartValueLabelGet Macro
C
#define GFX_GOL_ChartValueLabelGet(pCh) (((GFX_GOL_CHART *)pCh)->prm.pValLabel)
Description
Macros: GFX_GOL_ChartValueLabelGet(pCh)
This macro returns the address of the current text string used for the value axis label of the bar chart.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the pointer to the current value axis label text of the bar chart.
Side Effects
none
5.2.2.7.26.211 GFX_GOL_ChartValueLabelSet Macro
C
#define GFX_GOL_ChartValueLabelSet(pCh, pNewValueLabel) (((GFX_GOL_CHART *)pCh)->prm.pValLabel
= pNewValueLabel)
Description
Macros: GFX_GOL_ChartValueLabelSet(pCh, pNewYLabel)
This macro sets the address of the current text string used for the value axis label of the bar chart.
Preconditions
none
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Parameters
Parameters Description
pCh Pointer to the object.
pNewYLabel pointer to the string to be used as an value axis label of the bar chart.
Returns
none.
Side Effects
none
Example
See ChCreate() example.
5.2.2.7.26.212 GFX_GOL_ChartValueMaxGet Macro
C
#define GFX_GOL_ChartValueMaxGet(pCh) (pCh->prm.valMax)
Description
Macros: GFX_GOL_ChartValueMaxGet(pCh)
This macro returns the current maximum value that will be drawn for bar charts.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
Returns
Returns the maximum value set when bar charts are drawn.
Side Effects
none
5.2.2.7.26.213 GFX_GOL_ChartValueMinGet Macro
C
#define GFX_GOL_ChartValueMinGet(pCh) (pCh->prm.valMin)
Description
Macros: GFX_GOL_ChartValueMinGet(pCh)
This macro returns the current minimum value that will be drawn for bar charts.
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the object.
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Returns
Returns the minimum value set when bar charts are drawn.
Side Effects
none
5.2.2.7.26.214 GFX_GOL_ChartValueRangeGet Macro
C
#define GFX_GOL_ChartValueRangeGet(pCh) (pCh->prm.valMax - pCh->prm.valMin)
Description
This macro gets the current range for bar charts. The value returned is calculated from the current (valMax - valMin) set. To get
the minimum use ChGetValueMin() and to get the maximum use ChGetValueMax().
Preconditions
none
Parameters
Parameters Description
pCh Pointer to the chart object.
Returns
Value range computed from valMax-valMin.
Side Effects
none.
5.2.2.7.26.215 GFX_GOL_CheckBoxTextGet Macro
C
#define GFX_GOL_CheckBoxTextGet(pObject) (((GFX_GOL_CHECKBOX *)pObject)->pText)
Description
This function returns the address of the current text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to text string.
Example
// assume CHECK_BOX_OBJECT is a radio button that exists
GFX_XCHAR *pChar;
GFX_GOL_CHECKBOX *pObject = &CHECK_BOX_OBJECT;
pChar = GFX_GOL_CheckBoxTextGet(pObject);
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5.2.2.7.26.216 GFX_GOL_CUSTOMCONTROL_DISABLED Macro
C
#define GFX_GOL_CUSTOMCONTROL_DISABLED 0x0002 // disabled
Description
disabled
5.2.2.7.26.217 GFX_GOL_CUSTOMCONTROL_DRAW Macro
C
#define GFX_GOL_CUSTOMCONTROL_DRAW 0x4000 // whole control must be redrawn
Description
whole control must be redrawn
5.2.2.7.26.218 GFX_GOL_CUSTOMCONTROL_DRAW_BAR Macro
C
#define GFX_GOL_CUSTOMCONTROL_DRAW_BAR 0x2000 // control bar should be redrawn
Description
control bar should be redrawn
5.2.2.7.26.219 GFX_GOL_CUSTOMCONTROL_HIDE Macro
C
#define GFX_GOL_CUSTOMCONTROL_HIDE 0x8000 // must be removed from screen
Description
must be removed from screen
5.2.2.7.26.220 GFX_GOL_CustomControlGetPos Macro
C
#define GFX_GOL_CustomControlGetPos(pCc) pCc->pos
Description
Macros: GFX_GOL_CustomControlGetPos(pCc)
returns position
Preconditions
none
Parameters
Parameters Description
pCc pointer to the object
Returns
current position
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Side Effects
none
Remarks
none
5.2.2.7.26.221 GFX_GOL_CustomControlSetPos Macro
C
#define GFX_GOL_CustomControlSetPos(pCc, position) pCc->pos = position
Description
Macros: GFX_GOL_CustomControlSetPos(pCc,position)
sets the current position of the control
Preconditions
none
Parameters
Parameters Description
pCc the pointer to the object
position new position
Returns
none
Remarks
none
5.2.2.7.26.222 GFX_GOL_DIGITALMETER_INDENT Macro
C
#define GFX_GOL_DIGITALMETER_INDENT 0x02
Description
This is a DigitalMeter compile time option to define the indent constant for the text used in the frame.
5.2.2.7.26.223 GFX_GOL_DIGITALMETER_WIDTH Macro
C
#define GFX_GOL_DIGITALMETER_WIDTH 16
Description
This is a DigitalMeter compile time option to define the user should change this value depending on the number of digits he
wants to display.
5.2.2.7.26.224 GFX_GOL_DigitalMeterValueGet Macro
C
#define GFX_GOL_DigitalMeterValueGet(pObject) \
(((GFX_GOL_DIGITALMETER*)pObject)->value)
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Description
This function returns the current value of the digital meter.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The current value of the object.
Example
#define MAXVALUE 100;
GFX_GOL_DIGITALMETER *pMeter;
uint32_t ctr = 0;
// create scroll bar here and initialize parameters
pMeter = GFX_GOL_DigitalMeterCreate(....)
GFX_GOL_ObjectStateSet(pMeter, GFX_GOL_DIGITALMETER_DRAW_STATE);
// draw the scroll bar
GFX_GOL_ObjectListDraw();
// a routine that updates the position of the thumb through some
// conditions
while("some condition")
{
GFX_GOL_DigitalMeterValueSet(pMeter, ctr);
GFX_GOL_ObjectStateSet( pMeter,
GFX_GOL_DIGITALMETER_UPDATE_STATE);
// update the screen
GFX_GOL_ObjectListDraw();
// update ctr here
ctr = "some source of value";
}
if (GFX_GOL_DigitalMeterValueGet(pScrollBar) > MAXVALUE)
return 0;
else
"do something else"
5.2.2.7.26.225 GFX_GOL_FONT_DEFAULT_H_FILE Macro
C
#define GFX_GOL_FONT_DEFAULT_H_FILE
5.2.2.7.26.226 GFX_GOL_GroupboxTextGet Macro
C
#define GFX_GOL_GroupboxTextGet(pObject) (((GFX_GOL_GROUPBOX *)pObject)->pText)
Description
This function returns the address of the current text string used by the object.
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Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to text string.
Example
GFX_XCHAR *pChar;
GFX_GOL_GROUPBOX pGroupbox;
pChar = GFX_GOL_GroupboxTextGet(pGroupbox);
5.2.2.7.26.227 GFX_GOL_ListBoxItemCountGet Macro
C
#define GFX_GOL_ListBoxItemCountGet(pObject) \
(((GFX_GOL_LISTBOX *)pObject)->itemsNumber)
Description
This function returns the count of items in the list box.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object.
Returns
The number of items in the list box.
Example
None.
5.2.2.7.26.228 GFX_GOL_ListBoxItemImageGet Macro
C
#define GFX_GOL_ListBoxItemImageGet(pItem) (((GFX_GOL_LISTITEM *)pItem)->pImage)
Description
This function gets the image set for a list box item.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pItem pointer to the list box item.
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Returns
Pointer to the image used for the item.
Example
See GFX_GOL_ListBoxItemListGet() example.
5.2.2.7.26.229 GFX_GOL_ListBoxItemImageSet Macro
C
#define GFX_GOL_ListBoxItemImageSet(pItem, pImage) (((GFX_GOL_LISTITEM *)pItem)->pImage =
pImage)
Description
This function sets the image for a list box item.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pItem pointer to the list box item.
pImage pointer to the image resource.
Returns
None.
Example
See GFX_GOL_ListBoxItemAdd() and GFX_GOL_ListBoxItemListGet() example.
5.2.2.7.26.230 GFX_GOL_ListBoxItemListGet Macro
C
#define GFX_GOL_ListBoxItemListGet(pObject) \
((GFX_GOL_LISTITEM *)((GFX_GOL_LISTBOX *)pObject)->pItemList)
Description
This function returns the pointer to the item list of the list box.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
Returns
The pointer to the item list of the list box.
Example
// assume:
// pLb is a initialized to a list box in memory
// myIcon is a valid image in memory
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GFX_GOL_LISTITEM *pList, *pItem;
GFX_RESOURCE_HDR *pMyIcon = &myIcon;
pList = GFX_GOL_ListBoxItemListGet(pLb);
pItem = pList;
// set the image for all the items to myIcon
// set the last item image to NULL
do
{
GFX_GOL_ListBoxImageSet(pItem, &myIcon);
}
while(pItem->pNextItem != NULL);
// get the last item's image and set to null if not null
if (GFX_GOL_ListBoxItemImageGet(pItem) != NULL)
GFX_GOL_ListBoxImageSet(pItem, NULL);
5.2.2.7.26.231 GFX_GOL_ListBoxItemSelectStatusClear Macro
C
#define GFX_GOL_ListBoxItemSelectStatusClear(pObject, pItem) \
\
if(pItem->status & GFX_GOL_LISTBOX_ITEM_STATUS_SELECTED) \
GFX_GOL_ListBoxSelectionChange((LISTBOX *)pObject, pItem);
Description
This function clears the selection status of the item.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject The pointer to the object.
pItem The pointer the item that will have the selected status cleared.
Returns
None.
Example
None.
5.2.2.7.26.232 GFX_GOL_ListBoxItemSelectStatusSet Macro
C
#define GFX_GOL_ListBoxItemSelectStatusSet(pObject, pItem) \
\
if(!(pItem->status & GFX_GOL_LISTBOX_ITEM_STATUS_SELECTED)) \
GFX_GOL_ListBoxSelectionChange((LISTBOX *)pObject, pItem);
Description
This function sets the selection status of the item to selected.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject The pointer to the object.
pItem The pointer the item that will have the selected status set to selected.
Returns
None.
Example
None.
5.2.2.7.26.233 GFX_GOL_MeterMaximumValueGet Macro
C
#define GFX_GOL_MeterMaximumValueGet(pObject) (((GFX_GOL_METER *)pObject)->maxValue)
Description
This function returns the maximum value set for the meter.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The current maximum value set for the object.
Example
None.
5.2.2.7.26.234 GFX_GOL_MeterMinimumValueGet Macro
C
#define GFX_GOL_MeterMinimumValueGet(pObject) (((GFX_GOL_METER *)pObject)->minValue)
Description
This function returns the minimum value set for the meter.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The current minimum value set for the object.
Example
None.
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5.2.2.7.26.235 GFX_GOL_MeterTitleFontSet Macro
C
#define GFX_GOL_MeterTitleFontSet(pObject, pNewFont) (((GFX_GOL_METER *)pObject)->pTitleFont =
pNewFont)
Description
This function sets the meter title font used. Font pointer must be initialized to a valid GFX_RESOURCE_HDR.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pNewFont pointer to the selected font.
Returns
None.
Example
None.
5.2.2.7.26.236 GFX_GOL_MeterTypeSet Macro
C
#define GFX_GOL_MeterTypeSet(pObject, type) (((GFX_GOL_METER *)pObject)->type = type)
Description
This function sets the meter draw type.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
type the draw type selected (see GFX_GOL_METER_DRAW_TYPE for more
information).
Returns
None.
Example
None.
5.2.2.7.26.237 GFX_GOL_MeterValueFontSet Macro
C
#define GFX_GOL_MeterValueFontSet(pObject, pNewFont) (((GFX_GOL_METER *)pObject)->pValueFont =
pNewFont)
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Description
This function sets the meter's displayed value font used. Font pointer must be initialized to a valid GFX_RESOURCE_HDR.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pNewFont pointer to the selected font.
Returns
None.
Example
None.
5.2.2.7.26.238 GFX_GOL_MeterValueGet Macro
C
#define GFX_GOL_MeterValueGet(pMtr) (((GFX_GOL_METER*)pMtr)->value)
Description
This function returns the current value of the meter.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The current value of the object.
Example
#define MAXVALUE 100;
GFX_GOL_METER *pMeter;
uint32_t ctr = 0;
// create scroll bar here and initialize parameters
pMeter = GFX_GOL_MeterCreate(....)
GFX_GOL_ObjectStateSet(pMeter, GFX_GOL_METER_DRAW_STATE);
// draw the scroll bar
GFX_GOL_ObjectListDraw();
// a routine that updates the position of the thumb through some
// conditions
while("some condition")
{
GFX_GOL_MeterValueSet(pMeter, ctr);
GFX_GOL_ObjectStateSet( pMeter,
GFX_GOL_METER_UPDATE_DRAW_STATE);
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// update the screen
GFX_GOL_ObjectListDraw();
// update ctr here
ctr = "some source of value";
}
if (GFX_GOL_MeterValueGet(pScrollBar) > MAXVALUE)
return 0;
else
"do something else"
5.2.2.7.26.239 GFX_GOL_ObjectStateClear Macro
C
#define GFX_GOL_ObjectStateClear(pObject, stateBits) \
((((GFX_GOL_OBJ_HEADER*)pObject)->state) &= (~(stateBits)))
Description
This function clears the state bits of the given object. Object must be redrawn to display the changes. It is possible to set several
state bits with this function.
Preconditions
None.
Parameters
Parameters Description
pObject Pointer to the object.
stateBits Defines which state bits are to be cleared. Please refer to specific objects for
object state bits definition for details
Returns
GFX_STATUS_SUCCESS - is returned if the clear was successful. GFX_STATUS_FAILURE - is returned if the clear was not
successful.
Example
See GFX_GOL_ObjectStateSet() for code example.
5.2.2.7.26.240 GFX_GOL_ObjectStateGet Macro
C
#define GFX_GOL_ObjectStateGet(pObject, stateBits) \
(((GFX_GOL_OBJ_HEADER*)pObject)->state & stateBits)
Description
This function retrieves the current value of the state bits of an object. It is possible to get several state bits.
Preconditions
None.
Parameters
Parameters Description
pObject Pointer to the object.
stateBits Defines which state bits are to be retrieved. Please refer to specific objects for
object state bits definition for details
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Returns
The current status of the specified state bits.
Example
#define BTN_HIDE 0x8000
GFX_GOL_BUTTON *pB;
// pB is created and initialized
// do something here to set state
// Hide the button (remove from screen)
if (GFX_GOL_ObjectStateGet(pB, GFX_GOL_BUTTON_HIDE_STATE))
{
GFX_ColorSet(pB->pGolScheme->CommonBkColor);
GFX_BarDraw(pB->left, pB->top,pB->right,pB->bottom);
}
5.2.2.7.26.241 GFX_GOL_ObjectStateSet Macro
C
#define GFX_GOL_ObjectStateSet(pObject, stateBits) \
((((GFX_GOL_OBJ_HEADER*)pObject)->state) |= stateBits)
Description
This function sets the state bits of the given object. Object must be redrawn to display the changes. It is possible to set several
state bits with this function.
Preconditions
None.
Parameters
Parameters Description
pObject Pointer to the object.
stateBits Defines which state bits are to be cleared. Please refer to specific objects for
object state bits definition for details
Returns
GFX_STATUS_SUCCESS - is returned if the set was successful. GFX_STATUS_FAILURE - is returned if the set was not
successful.
Example
void SetMessage(uint16_t msg, GFX_GOL_BUTTON* pB)
{
switch(msg)
{
case GFX_GOL_BUTTON_ACTION_PRESSED:
// set pressed and redraw
GFX_GOL_ObjectStateSet(pB, BTN_PRESSED|BTN_DRAW);
break;
case GFX_GOL_BUTTON_ACTION_RELEASED:
// reset pressed
GFX_GOL_ObjectStateClear(pB, BTN_PRESSED);
// redraw
GFX_GOL_ObjectStateSet(pB, BTN_DRAW);
break;
default:
break;
}
}
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5.2.2.7.26.242 GFX_GOL_ProgressBarPositionGet Macro
C
#define GFX_GOL_ProgressBarPositionGet(pObject) (((GFX_GOL_PROGRESSBAR*)pObject)->pos)
Description
This function returns the current position of the progress bar.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The current position of the scroll bar thumb.
Example
See GFX_GOL_ProgressBarPositionSet() example.
5.2.2.7.26.243 GFX_GOL_ProgressBarRangeGet Macro
C
#define GFX_GOL_ProgressBarRangeGet(pObject) (pObject->range)
Description
This function returns the range of the progress bar.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The current range used by the object.
Example
None.
5.2.2.7.26.244 GFX_GOL_RadioButtonTextGet Macro
C
#define GFX_GOL_RadioButtonTextGet(pObject) (((GFX_GOL_RADIOBUTTON *)pObject)->pText)
Description
This function returns the address of the current text string used by the object.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to text string.
Example
// assume RADIO_BUTTON_OBJECT is a radio button that exists
GFX_XCHAR *pChar;
GFX_GOL_RADIOBUTTON *pRadioButton = &RADIO_BUTTON_OBJECT;
pChar = GFX_GOL_ButtonRadioTextGet(pRadioButton);
5.2.2.7.26.245 GFX_GOL_ROUNDDIAL_DISABLED Macro
C
#define GFX_GOL_ROUNDDIAL_DISABLED 0x0002 // Bit for disabled state.
Description
Bit for disabled state.
5.2.2.7.26.246 GFX_GOL_ROUNDDIAL_DRAW Macro
C
#define GFX_GOL_ROUNDDIAL_DRAW 0x4000 // Bit to indicate object must be redrawn.
Description
Bit to indicate object must be redrawn.
5.2.2.7.26.247 GFX_GOL_ROUNDDIAL_HIDE Macro
C
#define GFX_GOL_ROUNDDIAL_HIDE 0x8000 // Bit to indicate object must be removed from screen.
Description
Bit to indicate object must be removed from screen.
5.2.2.7.26.248 GFX_GOL_ROUNDDIAL_MAX_POSITIONS Macro
C
#define GFX_GOL_ROUNDDIAL_MAX_POSITIONS 24
Description
This is macro GFX_GOL_ROUNDDIAL_MAX_POSITIONS.
5.2.2.7.26.249 GFX_GOL_ROUNDDIAL_QUADRANT_POSITIONS Macro
C
#define GFX_GOL_ROUNDDIAL_QUADRANT_POSITIONS 6
Description
This is macro GFX_GOL_ROUNDDIAL_QUADRANT_POSITIONS.
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5.2.2.7.26.250 GFX_GOL_ROUNDDIAL_ROT_CCW Macro
C
#define GFX_GOL_ROUNDDIAL_ROT_CCW 0x0008 // Bit for rotate counter clockwise state.
Description
Bit for rotate counter clockwise state.
5.2.2.7.26.251 GFX_GOL_ROUNDDIAL_ROT_CW Macro
C
#define GFX_GOL_ROUNDDIAL_ROT_CW 0x0004 // Bit for rotate clockwise state.
Description
Bit for rotate clockwise state.
5.2.2.7.26.252 GFX_GOL_RoundDialValueDecrement Macro
C
#define GFX_GOL_RoundDialValueDecrement(pDia) GFX_GOL_RoundDial_ValSet(pDia, (pDia->pos -
pDia->res))
Description
Macros: GFX_GOL_RoundDialValueDecrement(pDia)
Preconditions
none
Parameters
Parameters Description
pDia Pointer to the object.
Returns
none
Remarks
none
Example
Refer to GFX_GOL_RoundDialValueIncrement() example.
5.2.2.7.26.253 GFX_GOL_RoundDialValueGet Macro
C
#define GFX_GOL_RoundDialValueGet(pDia) (pDia)->value
Description
Macros: GFX_GOL_RoundDialValueGet(pDia)
Preconditions
none
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Parameters
Parameters Description
pDia Pointer to the object.
Returns
Returns the current value of the dial.
Remarks
none
Example
uint16_t currVal;
GFX_GOL_ROUNDDIAL *pDia;
// assuming pDia is initialized to an existing dial Object
currVal = GFX_GOL_RoundDial_ValGet(pDia);
5.2.2.7.26.254 GFX_GOL_RoundDialValueIncrement Macro
C
#define GFX_GOL_RoundDialValueIncrement(pDia) GFX_GOL_RoundDial_ValSet(pDia, (pDia->val +
pDia->res))
Description
Macros: GFX_GOL_RoundDialValueIncrement(pDia)
Preconditions
none
Parameters
Parameters Description
pDia Pointer to the object.
Returns
none
none
Example
uint16_t updatedVal, prevVal;
GFX_GOL_ROUNDDIAL *pDia;
// assuming pDia is initialized to an existing dial Object
// assume GetInput() is a function that retrieves source data
prevVal = GFX_GOL_RoundDial_ValGet(pDia);
updatedVal = GetInput();
if (updatedVal > prevVal)
GFX_GOL_RoundDial_ValInc(pDia);
if (updatedVal < prevVal)
GFX_GOL_RoundDial_ValDec(pDia);
5.2.2.7.26.255 GFX_GOL_RoundDialValueSet Macro
C
#define GFX_GOL_RoundDialValueSet(pDia, newVal) (pDia)->value = newVal
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Description
Macros: GFX_GOL_RoundDialValueSet(pDia, newVal)
Preconditions
none
Parameters
Parameters Description
pDia Pointer to the object.
newVal New dial value.
Returns
none
Remarks
none
Example
uint16_t updatedVal;
GFX_GOL_ROUNDDIAL *pDia;
// assuming pDia is initialized to an existing dial Object
// assume GetInput() is a function that retrieves source data
updatedVal = GetInput();
GFX_GOL_RoundDialValueSet(pDia, updatedVal);
5.2.2.7.26.256 GFX_GOL_WindowImageGet Macro
C
#define GFX_GOL_WindowImageGet(pObject, pImage) \
(((GFX_GOL_WINDOW *)pObject)->pImage)
Description
This function gets the image used.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to the image resource.
Example
None.
5.2.2.7.26.257 GFX_GOL_WindowTextGet Macro
C
#define GFX_GOL_WindowTextGet(pObject) (((GFX_GOL_WINDOW *)pObject)->pText)
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Description
This function returns the address of the current text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to text string.
Example
GFX_XCHAR *pChar;
GFX_GOL_WINDOW pWindow;
pChar = GFX_GOL_WindowTextGet(pWindow);
5.2.2.7.26.258 GFX_ImageStretchSet Macro
C
#define GFX_ImageStretchSet(value) primitiveTaskImage.stretch = value
Description
This is macro GFX_ImageStretchSet.
5.2.2.7.26.259 GFX_MAX_INVALIDATE_AREAS Macro
C
#define GFX_MAX_INVALIDATE_AREAS 5
Description
This is macro GFX_MAX_INVALIDATE_AREAS.
5.2.2.7.26.260 GFX_MaxXGet Macro
C
#define GFX_MaxXGet (GFX_DRV_instance[0].horizontalResolution-1)
Example
Remarks:
5.2.2.7.26.261 GFX_MaxYGet Macro
C
#define GFX_MaxYGet (GFX_DRV_instance[0].verticalResolution-1)
Example
Remarks:
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5.2.2.7.26.262 GFX_MEM_MASK Macro
C
#define GFX_MEM_MASK 0x000F
Description
This is macro GFX_MEM_MASK.
5.2.2.7.26.263 GFX_PixelPut Macro
C
#define GFX_PixelPut(x, y) GFX_PixelsPut(x, y, 1, 1)
Description
This is macro GFX_PixelPut.
5.2.2.7.26.264 GFX_PixelsPut Macro
C
#define GFX_PixelsPut(x, y, count, lineCount) GFX_RectangleFillDraw(x, y, x+count, y+lineCount)
Description
None
Preconditions
None
Parameters
Parameters Description
instance primitive instance
x x position of the left top corner.
y y position of the left top corner.
count number of pixels
Returns
Queue handle once the primitive has been place in queue
Example
None
5.2.2.7.26.265 GFX_PrevAlphaColorGet Macro
C
#define GFX_PrevAlphaColorGet GFX_Primitive_instance.alphaArea.prevAlphaColor
Example
Remarks:
5.2.2.7.26.266 GFX_PrevAlphaColorSet Macro
C
#define GFX_PrevAlphaColorSet(color) GFX_Primitive_instance.alphaArea.prevAlphaColor = color
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Example
Remarks:
5.2.2.7.26.267 GFX_RGBConvert Macro
C
#define GFX_RGBConvert(red, green, blue) (GFX_COLOR) (((GFX_COLOR)(red) << 16) |
((GFX_COLOR)(green) << 8) | (GFX_COLOR)(blue))
Description
Macros: GFX_RGBConvert(red, green, blue)
This macro converts the color data to the selected COLOR_DEPTH. This macro is only valid when COLOR_DEPTH is 8, 16, or
24.
COLOR_DEPTH Conversion
8 8-8-8 to 3-3-2 conversion
16 8-8-8 to to 5-6-5 conversion
24 8-8-8 to 8-8-8 conversion or no conversion
Preconditions
none
Parameters
Parameters Description
red red component of the color.
green green component of the color.
blue blue component of the color.
Returns
none
Side Effects
none
5.2.2.7.26.268 GFX_SetFontOrientation Macro
C
#define GFX_SetFontOrientation(orient) GFX_Primitive_instance.currentFont.orientation = orient;
Preconditions
None.
Parameters
Parameters Description
orient sets font orientation when rendering characters and strings.
Returns
None.
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Example
5.2.2.7.26.269 GFX_TYPE_MASK Macro
C
#define GFX_TYPE_MASK 0x0F00
Description
This is macro GFX_TYPE_MASK.
5.2.2.7.26.270 GFX_TYPES_FONTS_H Macro
C
#define GFX_TYPES_FONTS_H
Description
This is macro GFX_TYPES_FONTS_H.
5.2.2.7.26.271 GFX_TYPES_IMAGE_H Macro
C
#define GFX_TYPES_IMAGE_H
Description
This is macro GFX_TYPES_IMAGE_H.
5.2.2.7.26.272 GFX_TYPES_PALETTE_H Macro
C
#define GFX_TYPES_PALETTE_H
Description
This is macro GFX_TYPES_PALETTE_H.
5.2.2.7.26.273 GFX_TYPES_RESOURCE_H Macro
C
#define GFX_TYPES_RESOURCE_H
Description
This is macro GFX_TYPES_RESOURCE_H.
5.2.2.7.26.274 GFX_UXCHAR Macro
C
#define GFX_UXCHAR uint8_t
Description
This is macro GFX_UXCHAR.
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5.2.2.7.26.275 GFX_VisualPageGet Macro
C
#define GFX_VisualPageGet GFX_Primitive_instance.visualPage
Preconditions
None.
Returns
None.
Example
Remarks:
5.2.2.7.26.276 GFX_W3_ALICEBLUE Macro
C
#define GFX_W3_ALICEBLUE GFX_RGBConvert(240, 248, 255)
Description
This is macro GFX_W3_ALICEBLUE.
5.2.2.7.26.277 GFX_W3_ANTIQUEWHITE Macro
C
#define GFX_W3_ANTIQUEWHITE GFX_RGBConvert(250, 235, 215)
Description
This is macro GFX_W3_ANTIQUEWHITE.
5.2.2.7.26.278 GFX_W3_AQUA Macro
C
#define GFX_W3_AQUA GFX_RGBConvert( 0, 255, 255)
Description
This is macro GFX_W3_AQUA.
5.2.2.7.26.279 GFX_W3_AQUAMARINE Macro
C
#define GFX_W3_AQUAMARINE GFX_RGBConvert(127, 255, 212)
Description
This is macro GFX_W3_AQUAMARINE.
5.2.2.7.26.280 GFX_W3_AZURE Macro
C
#define GFX_W3_AZURE GFX_RGBConvert(240, 255, 255)
Description
This is macro GFX_W3_AZURE.
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5.2.2.7.26.281 GFX_W3_BEIGE Macro
C
#define GFX_W3_BEIGE GFX_RGBConvert(245, 245, 220)
Description
This is macro GFX_W3_BEIGE.
5.2.2.7.26.282 GFX_W3_BISQUE Macro
C
#define GFX_W3_BISQUE GFX_RGBConvert(255, 228, 196)
Description
This is macro GFX_W3_BISQUE.
5.2.2.7.26.283 GFX_W3_BLACK Macro
C
#define GFX_W3_BLACK GFX_RGBConvert( 0, 0, 0)
Description
This is macro GFX_W3_BLACK.
5.2.2.7.26.284 GFX_W3_BLANCHEDALMOND Macro
C
#define GFX_W3_BLANCHEDALMOND GFX_RGBConvert(255, 235, 205)
Description
This is macro GFX_W3_BLANCHEDALMOND.
5.2.2.7.26.285 GFX_W3_BLUE Macro
C
#define GFX_W3_BLUE GFX_RGBConvert( 0, 0, 255)
Description
This is macro GFX_W3_BLUE.
5.2.2.7.26.286 GFX_W3_BLUEVIOLET Macro
C
#define GFX_W3_BLUEVIOLET GFX_RGBConvert(138, 43, 226)
Description
This is macro GFX_W3_BLUEVIOLET.
5.2.2.7.26.287 GFX_W3_BROWN Macro
C
#define GFX_W3_BROWN GFX_RGBConvert(165, 42, 42)
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Description
This is macro GFX_W3_BROWN.
5.2.2.7.26.288 GFX_W3_BURLYWOOD Macro
C
#define GFX_W3_BURLYWOOD GFX_RGBConvert(222, 184, 135)
Description
This is macro GFX_W3_BURLYWOOD.
5.2.2.7.26.289 GFX_W3_CADETBLUE Macro
C
#define GFX_W3_CADETBLUE GFX_RGBConvert( 95, 158, 160)
Description
This is macro GFX_W3_CADETBLUE.
5.2.2.7.26.290 GFX_W3_CHARTREUSE Macro
C
#define GFX_W3_CHARTREUSE GFX_RGBConvert(127, 255, 0)
Description
This is macro GFX_W3_CHARTREUSE.
5.2.2.7.26.291 GFX_W3_CHOCOLATE Macro
C
#define GFX_W3_CHOCOLATE GFX_RGBConvert(210, 105, 30)
Description
This is macro GFX_W3_CHOCOLATE.
5.2.2.7.26.292 GFX_W3_CORAL Macro
C
#define GFX_W3_CORAL GFX_RGBConvert(255, 127, 80)
Description
This is macro GFX_W3_CORAL.
5.2.2.7.26.293 GFX_W3_CORNFLOWERBLUE Macro
C
#define GFX_W3_CORNFLOWERBLUE GFX_RGBConvert(100, 149, 237)
Description
This is macro GFX_W3_CORNFLOWERBLUE.
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5.2.2.7.26.294 GFX_W3_CORNSILK Macro
C
#define GFX_W3_CORNSILK GFX_RGBConvert(255, 248, 220)
Description
This is macro GFX_W3_CORNSILK.
5.2.2.7.26.295 GFX_W3_CRIMSON Macro
C
#define GFX_W3_CRIMSON GFX_RGBConvert(220, 20, 60)
Description
This is macro GFX_W3_CRIMSON.
5.2.2.7.26.296 GFX_W3_CYAN Macro
C
#define GFX_W3_CYAN GFX_RGBConvert( 0, 255, 255)
Description
This is macro GFX_W3_CYAN.
5.2.2.7.26.297 GFX_W3_DARKBLUE Macro
C
#define GFX_W3_DARKBLUE GFX_RGBConvert( 0, 0, 139)
Description
This is macro GFX_W3_DARKBLUE.
5.2.2.7.26.298 GFX_W3_DARKCYAN Macro
C
#define GFX_W3_DARKCYAN GFX_RGBConvert( 0, 139, 139)
Description
This is macro GFX_W3_DARKCYAN.
5.2.2.7.26.299 GFX_W3_darkgoldenrod Macro
C
#define GFX_W3_darkgoldenrod GFX_RGBConvert(184, 134, 11)
Description
This is macro GFX_W3_darkgoldenrod.
5.2.2.7.26.300 GFX_W3_DARKGRAY Macro
C
#define GFX_W3_DARKGRAY GFX_RGBConvert(169, 169, 169)
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Description
This is macro GFX_W3_DARKGRAY.
5.2.2.7.26.301 GFX_W3_DARKGREEN Macro
C
#define GFX_W3_DARKGREEN GFX_RGBConvert( 0, 100, 0)
Description
This is macro GFX_W3_DARKGREEN.
5.2.2.7.26.302 GFX_W3_DARKGREY Macro
C
#define GFX_W3_DARKGREY GFX_RGBConvert(169, 169, 169)
Description
This is macro GFX_W3_DARKGREY.
5.2.2.7.26.303 GFX_W3_DARKHAKI Macro
C
#define GFX_W3_DARKHAKI GFX_RGBConvert(189, 183, 107)
Description
This is macro GFX_W3_DARKHAKI.
5.2.2.7.26.304 GFX_W3_DARKMAGENTA Macro
C
#define GFX_W3_DARKMAGENTA GFX_RGBConvert(139, 0, 139)
Description
This is macro GFX_W3_DARKMAGENTA.
5.2.2.7.26.305 GFX_W3_DARKOLIVEGREEN Macro
C
#define GFX_W3_DARKOLIVEGREEN GFX_RGBConvert( 85, 107, 47)
Description
This is macro GFX_W3_DARKOLIVEGREEN.
5.2.2.7.26.306 GFX_W3_DARKORANGE Macro
C
#define GFX_W3_DARKORANGE GFX_RGBConvert(255, 140, 0)
Description
This is macro GFX_W3_DARKORANGE.
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5.2.2.7.26.307 GFX_W3_DARKORCHID Macro
C
#define GFX_W3_DARKORCHID GFX_RGBConvert(153, 50, 204)
Description
This is macro GFX_W3_DARKORCHID.
5.2.2.7.26.308 GFX_W3_DARKRED Macro
C
#define GFX_W3_DARKRED GFX_RGBConvert(139, 0, 0)
Description
This is macro GFX_W3_DARKRED.
5.2.2.7.26.309 GFX_W3_DARKSALMON Macro
C
#define GFX_W3_DARKSALMON GFX_RGBConvert(233, 150, 122)
Description
This is macro GFX_W3_DARKSALMON.
5.2.2.7.26.310 GFX_W3_DARKSEAGREEN Macro
C
#define GFX_W3_DARKSEAGREEN GFX_RGBConvert(143, 188, 143)
Description
This is macro GFX_W3_DARKSEAGREEN.
5.2.2.7.26.311 GFX_W3_DARKSLATEBLUE Macro
C
#define GFX_W3_DARKSLATEBLUE GFX_RGBConvert( 72, 61, 139)
Description
This is macro GFX_W3_DARKSLATEBLUE.
5.2.2.7.26.312 GFX_W3_DARKSLATEGRAY Macro
C
#define GFX_W3_DARKSLATEGRAY GFX_RGBConvert( 47, 79, 79)
Description
This is macro GFX_W3_DARKSLATEGRAY.
5.2.2.7.26.313 GFX_W3_DARKSLATEGREY Macro
C
#define GFX_W3_DARKSLATEGREY GFX_RGBConvert( 47, 79, 79)
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Description
This is macro GFX_W3_DARKSLATEGREY.
5.2.2.7.26.314 GFX_W3_DARKTURQUOISE Macro
C
#define GFX_W3_DARKTURQUOISE GFX_RGBConvert( 0, 206, 209)
Description
This is macro GFX_W3_DARKTURQUOISE.
5.2.2.7.26.315 GFX_W3_DARKVIOLET Macro
C
#define GFX_W3_DARKVIOLET GFX_RGBConvert(148, 0, 211)
Description
This is macro GFX_W3_DARKVIOLET.
5.2.2.7.26.316 GFX_W3_DEEPPINK Macro
C
#define GFX_W3_DEEPPINK GFX_RGBConvert(255, 20, 147)
Description
This is macro GFX_W3_DEEPPINK.
5.2.2.7.26.317 GFX_W3_DEEPSKYBLUE Macro
C
#define GFX_W3_DEEPSKYBLUE GFX_RGBConvert( 0, 191, 255)
Description
This is macro GFX_W3_DEEPSKYBLUE.
5.2.2.7.26.318 GFX_W3_DIMGRAY Macro
C
#define GFX_W3_DIMGRAY GFX_RGBConvert(105, 105, 105)
Description
This is macro GFX_W3_DIMGRAY.
5.2.2.7.26.319 GFX_W3_DIMGREY Macro
C
#define GFX_W3_DIMGREY GFX_RGBConvert(105, 105, 105)
Description
This is macro GFX_W3_DIMGREY.
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5.2.2.7.26.320 GFX_W3_DODGERBLUE Macro
C
#define GFX_W3_DODGERBLUE GFX_RGBConvert( 30, 144, 255)
Description
This is macro GFX_W3_DODGERBLUE.
5.2.2.7.26.321 GFX_W3_FIREBRICK Macro
C
#define GFX_W3_FIREBRICK GFX_RGBConvert(178, 34, 34)
Description
This is macro GFX_W3_FIREBRICK.
5.2.2.7.26.322 GFX_W3_FLORALWHITE Macro
C
#define GFX_W3_FLORALWHITE GFX_RGBConvert(255, 250, 240)
Description
This is macro GFX_W3_FLORALWHITE.
5.2.2.7.26.323 GFX_W3_FORESTGREEN Macro
C
#define GFX_W3_FORESTGREEN GFX_RGBConvert( 34, 139, 34)
Description
This is macro GFX_W3_FORESTGREEN.
5.2.2.7.26.324 GFX_W3_FUCHSIA Macro
C
#define GFX_W3_FUCHSIA GFX_RGBConvert(255, 0, 255)
Description
This is macro GFX_W3_FUCHSIA.
5.2.2.7.26.325 GFX_W3_GAINSBORO Macro
C
#define GFX_W3_GAINSBORO GFX_RGBConvert(220, 220, 220)
Description
This is macro GFX_W3_GAINSBORO.
5.2.2.7.26.326 GFX_W3_GHOSTWHITE Macro
C
#define GFX_W3_GHOSTWHITE GFX_RGBConvert(248, 248, 255)
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Description
This is macro GFX_W3_GHOSTWHITE.
5.2.2.7.26.327 GFX_W3_GOLD Macro
C
#define GFX_W3_GOLD GFX_RGBConvert(255, 215, 0)
Description
This is macro GFX_W3_GOLD.
5.2.2.7.26.328 GFX_W3_GOLDENROD Macro
C
#define GFX_W3_GOLDENROD GFX_RGBConvert(218, 165, 32)
Description
This is macro GFX_W3_GOLDENROD.
5.2.2.7.26.329 GFX_W3_GRAY Macro
C
#define GFX_W3_GRAY GFX_RGBConvert(128, 128, 128)
Description
This is macro GFX_W3_GRAY.
5.2.2.7.26.330 GFX_W3_GREEN Macro
C
#define GFX_W3_GREEN GFX_RGBConvert( 0, 128, 0)
Description
This is macro GFX_W3_GREEN.
5.2.2.7.26.331 GFX_W3_GREENYELLOW Macro
C
#define GFX_W3_GREENYELLOW GFX_RGBConvert(173, 255, 47)
Description
This is macro GFX_W3_GREENYELLOW.
5.2.2.7.26.332 GFX_W3_GREY Macro
C
#define GFX_W3_GREY GFX_RGBConvert(128, 128, 128)
Description
This is macro GFX_W3_GREY.
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5.2.2.7.26.333 GFX_W3_HONEYDEW Macro
C
#define GFX_W3_HONEYDEW GFX_RGBConvert(240, 255, 240)
Description
This is macro GFX_W3_HONEYDEW.
5.2.2.7.26.334 GFX_W3_HOTPINK Macro
C
#define GFX_W3_HOTPINK GFX_RGBConvert(255, 105, 180)
Description
This is macro GFX_W3_HOTPINK.
5.2.2.7.26.335 GFX_W3_INDIANRED Macro
C
#define GFX_W3_INDIANRED GFX_RGBConvert(205, 92, 92)
Description
This is macro GFX_W3_INDIANRED.
5.2.2.7.26.336 GFX_W3_INDIGO Macro
C
#define GFX_W3_INDIGO GFX_RGBConvert( 75, 0, 130)
Description
This is macro GFX_W3_INDIGO.
5.2.2.7.26.337 GFX_W3_IVORY Macro
C
#define GFX_W3_IVORY GFX_RGBConvert(255, 255, 240)
Description
This is macro GFX_W3_IVORY.
5.2.2.7.26.338 GFX_W3_LAVENDER Macro
C
#define GFX_W3_LAVENDER GFX_RGBConvert(230, 230, 250)
Description
This is macro GFX_W3_LAVENDER.
5.2.2.7.26.339 GFX_W3_LAVENDERBLUSH Macro
C
#define GFX_W3_LAVENDERBLUSH GFX_RGBConvert(255, 240, 245)
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Description
This is macro GFX_W3_LAVENDERBLUSH.
5.2.2.7.26.340 GFX_W3_LAWNGREEN Macro
C
#define GFX_W3_LAWNGREEN GFX_RGBConvert(124, 252, 0)
Description
This is macro GFX_W3_LAWNGREEN.
5.2.2.7.26.341 GFX_W3_LEMONCHIFFON Macro
C
#define GFX_W3_LEMONCHIFFON GFX_RGBConvert(255, 250, 205)
Description
This is macro GFX_W3_LEMONCHIFFON.
5.2.2.7.26.342 GFX_W3_LIGHTBLUE Macro
C
#define GFX_W3_LIGHTBLUE GFX_RGBConvert(173, 216, 230)
Description
This is macro GFX_W3_LIGHTBLUE.
5.2.2.7.26.343 GFX_W3_LIGHTCORAL Macro
C
#define GFX_W3_LIGHTCORAL GFX_RGBConvert(240, 128, 128)
Description
This is macro GFX_W3_LIGHTCORAL.
5.2.2.7.26.344 GFX_W3_LIGHTCYAN Macro
C
#define GFX_W3_LIGHTCYAN GFX_RGBConvert(224, 255, 255)
Description
This is macro GFX_W3_LIGHTCYAN.
5.2.2.7.26.345 GFX_W3_LIGHTGOLDENRODYELLOW Macro
C
#define GFX_W3_LIGHTGOLDENRODYELLOW GFX_RGBConvert(250, 250, 210)
Description
This is macro GFX_W3_LIGHTGOLDENRODYELLOW.
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5.2.2.7.26.346 GFX_W3_LIGHTGRAY Macro
C
#define GFX_W3_LIGHTGRAY GFX_RGBConvert(211, 211, 211)
Description
This is macro GFX_W3_LIGHTGRAY.
5.2.2.7.26.347 GFX_W3_LIGHTGREEN Macro
C
#define GFX_W3_LIGHTGREEN GFX_RGBConvert(144, 238, 144)
Description
This is macro GFX_W3_LIGHTGREEN.
5.2.2.7.26.348 GFX_W3_LIGHTGREY Macro
C
#define GFX_W3_LIGHTGREY GFX_RGBConvert(211, 211, 211)
Description
This is macro GFX_W3_LIGHTGREY.
5.2.2.7.26.349 GFX_W3_LIGHTPINK Macro
C
#define GFX_W3_LIGHTPINK GFX_RGBConvert(255, 182, 193)
Description
This is macro GFX_W3_LIGHTPINK.
5.2.2.7.26.350 GFX_W3_LIGHTSALMON Macro
C
#define GFX_W3_LIGHTSALMON GFX_RGBConvert(255, 160, 122)
Description
This is macro GFX_W3_LIGHTSALMON.
5.2.2.7.26.351 GFX_W3_LIGHTSKYBLUE Macro
C
#define GFX_W3_LIGHTSKYBLUE GFX_RGBConvert(135, 206, 250)
Description
This is macro GFX_W3_LIGHTSKYBLUE.
5.2.2.7.26.352 GFX_W3_LIGHTSLATEGRAY Macro
C
#define GFX_W3_LIGHTSLATEGRAY GFX_RGBConvert(119, 136, 153)
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Description
This is macro GFX_W3_LIGHTSLATEGRAY.
5.2.2.7.26.353 GFX_W3_LIGHTSLATEGREY Macro
C
#define GFX_W3_LIGHTSLATEGREY GFX_RGBConvert(119, 136, 153)
Description
This is macro GFX_W3_LIGHTSLATEGREY.
5.2.2.7.26.354 GFX_W3_LIGHTSTEELBLUE Macro
C
#define GFX_W3_LIGHTSTEELBLUE GFX_RGBConvert(176, 196, 222)
Description
This is macro GFX_W3_LIGHTSTEELBLUE.
5.2.2.7.26.355 GFX_W3_LIGHTYELLOW Macro
C
#define GFX_W3_LIGHTYELLOW GFX_RGBConvert(255, 255, 224)
Description
This is macro GFX_W3_LIGHTYELLOW.
5.2.2.7.26.356 GFX_W3_LIGTHSEAGREEN Macro
C
#define GFX_W3_LIGTHSEAGREEN GFX_RGBConvert( 32, 178, 170)
Description
This is macro GFX_W3_LIGTHSEAGREEN.
5.2.2.7.26.357 GFX_W3_LIME Macro
C
#define GFX_W3_LIME GFX_RGBConvert( 0, 255, 0)
Description
This is macro GFX_W3_LIME.
5.2.2.7.26.358 GFX_W3_LIMEGREEN Macro
C
#define GFX_W3_LIMEGREEN GFX_RGBConvert( 50, 205, 50)
Description
This is macro GFX_W3_LIMEGREEN.
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5.2.2.7.26.359 GFX_W3_LINEN Macro
C
#define GFX_W3_LINEN GFX_RGBConvert(250, 240, 230)
Description
This is macro GFX_W3_LINEN.
5.2.2.7.26.360 GFX_W3_MAGENTA Macro
C
#define GFX_W3_MAGENTA GFX_RGBConvert(255, 0, 255)
Description
This is macro GFX_W3_MAGENTA.
5.2.2.7.26.361 GFX_W3_MAROON Macro
C
#define GFX_W3_MAROON GFX_RGBConvert(128, 0, 0)
Description
This is macro GFX_W3_MAROON.
5.2.2.7.26.362 GFX_W3_MEDIUMAQUAMARINE Macro
C
#define GFX_W3_MEDIUMAQUAMARINE GFX_RGBConvert(102, 205, 170)
Description
This is macro GFX_W3_MEDIUMAQUAMARINE.
5.2.2.7.26.363 GFX_W3_MEDIUMBLUE Macro
C
#define GFX_W3_MEDIUMBLUE GFX_RGBConvert( 0, 0, 205)
Description
This is macro GFX_W3_MEDIUMBLUE.
5.2.2.7.26.364 GFX_W3_MEDIUMORCHID Macro
C
#define GFX_W3_MEDIUMORCHID GFX_RGBConvert(186, 85, 211)
Description
This is macro GFX_W3_MEDIUMORCHID.
5.2.2.7.26.365 GFX_W3_MEDIUMPURPLE Macro
C
#define GFX_W3_MEDIUMPURPLE GFX_RGBConvert(147, 112, 219)
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Description
This is macro GFX_W3_MEDIUMPURPLE.
5.2.2.7.26.366 GFX_W3_MEDIUMSEAGREEN Macro
C
#define GFX_W3_MEDIUMSEAGREEN GFX_RGBConvert( 60, 179, 113)
Description
This is macro GFX_W3_MEDIUMSEAGREEN.
5.2.2.7.26.367 GFX_W3_MEDIUMSLATEBLUE Macro
C
#define GFX_W3_MEDIUMSLATEBLUE GFX_RGBConvert(123, 104, 238)
Description
This is macro GFX_W3_MEDIUMSLATEBLUE.
5.2.2.7.26.368 GFX_W3_MEDIUMSPRINGGREEN Macro
C
#define GFX_W3_MEDIUMSPRINGGREEN GFX_RGBConvert( 0, 250, 154)
Description
This is macro GFX_W3_MEDIUMSPRINGGREEN.
5.2.2.7.26.369 GFX_W3_MEDIUMTURQUOISE Macro
C
#define GFX_W3_MEDIUMTURQUOISE GFX_RGBConvert( 72, 209, 204)
Description
This is macro GFX_W3_MEDIUMTURQUOISE.
5.2.2.7.26.370 GFX_W3_MEDIUMVIOLETRED Macro
C
#define GFX_W3_MEDIUMVIOLETRED GFX_RGBConvert(199, 21, 133)
Description
This is macro GFX_W3_MEDIUMVIOLETRED.
5.2.2.7.26.371 GFX_W3_MIDNIGHTBLUE Macro
C
#define GFX_W3_MIDNIGHTBLUE GFX_RGBConvert( 25, 25, 112)
Description
This is macro GFX_W3_MIDNIGHTBLUE.
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5.2.2.7.26.372 GFX_W3_MINTCREAM Macro
C
#define GFX_W3_MINTCREAM GFX_RGBConvert(245, 255, 250)
Description
This is macro GFX_W3_MINTCREAM.
5.2.2.7.26.373 GFX_W3_MISTYROSE Macro
C
#define GFX_W3_MISTYROSE GFX_RGBConvert(255, 228, 225)
Description
This is macro GFX_W3_MISTYROSE.
5.2.2.7.26.374 GFX_W3_MOCCASIN Macro
C
#define GFX_W3_MOCCASIN GFX_RGBConvert(255, 228, 181)
Description
This is macro GFX_W3_MOCCASIN.
5.2.2.7.26.375 GFX_W3_NAVAJOWHITE Macro
C
#define GFX_W3_NAVAJOWHITE GFX_RGBConvert(255, 222, 173)
Description
This is macro GFX_W3_NAVAJOWHITE.
5.2.2.7.26.376 GFX_W3_NAVY Macro
C
#define GFX_W3_NAVY GFX_RGBConvert( 0, 0, 128)
Description
This is macro GFX_W3_NAVY.
5.2.2.7.26.377 GFX_W3_OLDLACE Macro
C
#define GFX_W3_OLDLACE GFX_RGBConvert(253, 245, 230)
Description
This is macro GFX_W3_OLDLACE.
5.2.2.7.26.378 GFX_W3_OLIVE Macro
C
#define GFX_W3_OLIVE GFX_RGBConvert(128, 128, 0)
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Description
This is macro GFX_W3_OLIVE.
5.2.2.7.26.379 GFX_W3_OLIVEDRAB Macro
C
#define GFX_W3_OLIVEDRAB GFX_RGBConvert(107, 142, 35)
Description
This is macro GFX_W3_OLIVEDRAB.
5.2.2.7.26.380 GFX_W3_ORANGE Macro
C
#define GFX_W3_ORANGE GFX_RGBConvert(255, 165, 0)
Description
This is macro GFX_W3_ORANGE.
5.2.2.7.26.381 GFX_W3_ORANGERED Macro
C
#define GFX_W3_ORANGERED GFX_RGBConvert(255, 69, 0)
Description
This is macro GFX_W3_ORANGERED.
5.2.2.7.26.382 GFX_W3_ORCHID Macro
C
#define GFX_W3_ORCHID GFX_RGBConvert(218, 112, 214)
Description
This is macro GFX_W3_ORCHID.
5.2.2.7.26.383 GFX_W3_PALEGOLDENROD Macro
C
#define GFX_W3_PALEGOLDENROD GFX_RGBConvert(238, 232, 170)
Description
This is macro GFX_W3_PALEGOLDENROD.
5.2.2.7.26.384 GFX_W3_PALEGREEN Macro
C
#define GFX_W3_PALEGREEN GFX_RGBConvert(152, 251, 152)
Description
This is macro GFX_W3_PALEGREEN.
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5.2.2.7.26.385 GFX_W3_PALETURQUOISE Macro
C
#define GFX_W3_PALETURQUOISE GFX_RGBConvert(175, 238, 238)
Description
This is macro GFX_W3_PALETURQUOISE.
5.2.2.7.26.386 GFX_W3_PALEVIOLETRED Macro
C
#define GFX_W3_PALEVIOLETRED GFX_RGBConvert(219, 112, 147)
Description
This is macro GFX_W3_PALEVIOLETRED.
5.2.2.7.26.387 GFX_W3_PAPAYAWHIP Macro
C
#define GFX_W3_PAPAYAWHIP GFX_RGBConvert(255, 239, 213)
Description
This is macro GFX_W3_PAPAYAWHIP.
5.2.2.7.26.388 GFX_W3_PEACHPUFF Macro
C
#define GFX_W3_PEACHPUFF GFX_RGBConvert(255, 218, 185)
Description
This is macro GFX_W3_PEACHPUFF.
5.2.2.7.26.389 GFX_W3_PERU Macro
C
#define GFX_W3_PERU GFX_RGBConvert(205, 133, 63)
Description
This is macro GFX_W3_PERU.
5.2.2.7.26.390 GFX_W3_PINK Macro
C
#define GFX_W3_PINK GFX_RGBConvert(255, 192, 203)
Description
This is macro GFX_W3_PINK.
5.2.2.7.26.391 GFX_W3_PLUM Macro
C
#define GFX_W3_PLUM GFX_RGBConvert(221, 160, 221)
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Description
This is macro GFX_W3_PLUM.
5.2.2.7.26.392 GFX_W3_POWDERBLUE Macro
C
#define GFX_W3_POWDERBLUE GFX_RGBConvert(176, 224, 230)
Description
This is macro GFX_W3_POWDERBLUE.
5.2.2.7.26.393 GFX_W3_PURPLE Macro
C
#define GFX_W3_PURPLE GFX_RGBConvert(128, 0, 128)
Description
This is macro GFX_W3_PURPLE.
5.2.2.7.26.394 GFX_W3_RED Macro
C
#define GFX_W3_RED GFX_RGBConvert(255, 0, 0)
Description
This is macro GFX_W3_RED.
5.2.2.7.26.395 GFX_W3_ROSYBROWN Macro
C
#define GFX_W3_ROSYBROWN GFX_RGBConvert(188, 143, 143)
Description
This is macro GFX_W3_ROSYBROWN.
5.2.2.7.26.396 GFX_W3_ROYALBLUE Macro
C
#define GFX_W3_ROYALBLUE GFX_RGBConvert( 65, 105, 225)
Description
This is macro GFX_W3_ROYALBLUE.
5.2.2.7.26.397 GFX_W3_SADDLEBROWN Macro
C
#define GFX_W3_SADDLEBROWN GFX_RGBConvert(139, 69, 19)
Description
This is macro GFX_W3_SADDLEBROWN.
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5.2.2.7.26.398 GFX_W3_SALMON Macro
C
#define GFX_W3_SALMON GFX_RGBConvert(250, 128, 114)
Description
This is macro GFX_W3_SALMON.
5.2.2.7.26.399 GFX_W3_SANDYGREEN Macro
C
#define GFX_W3_SANDYGREEN GFX_RGBConvert(244, 164, 96)
Description
This is macro GFX_W3_SANDYGREEN.
5.2.2.7.26.400 GFX_W3_SEAGREEN Macro
C
#define GFX_W3_SEAGREEN GFX_RGBConvert( 46, 139, 87)
Description
This is macro GFX_W3_SEAGREEN.
5.2.2.7.26.401 GFX_W3_SEASHELL Macro
C
#define GFX_W3_SEASHELL GFX_RGBConvert(255, 245, 238)
Description
This is macro GFX_W3_SEASHELL.
5.2.2.7.26.402 GFX_W3_SIENNA Macro
C
#define GFX_W3_SIENNA GFX_RGBConvert(160, 82, 45)
Description
This is macro GFX_W3_SIENNA.
5.2.2.7.26.403 GFX_W3_SILVER Macro
C
#define GFX_W3_SILVER GFX_RGBConvert(192, 192, 192)
Description
This is macro GFX_W3_SILVER.
5.2.2.7.26.404 GFX_W3_SKYBLUE Macro
C
#define GFX_W3_SKYBLUE GFX_RGBConvert(135, 206, 235)
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Description
This is macro GFX_W3_SKYBLUE.
5.2.2.7.26.405 GFX_W3_SLATEBLUE Macro
C
#define GFX_W3_SLATEBLUE GFX_RGBConvert(106, 90, 205)
Description
This is macro GFX_W3_SLATEBLUE.
5.2.2.7.26.406 GFX_W3_SLATEGRAY Macro
C
#define GFX_W3_SLATEGRAY GFX_RGBConvert(112, 128, 144)
Description
This is macro GFX_W3_SLATEGRAY.
5.2.2.7.26.407 GFX_W3_SLATEGREY Macro
C
#define GFX_W3_SLATEGREY GFX_RGBConvert(112, 128, 144)
Description
This is macro GFX_W3_SLATEGREY.
5.2.2.7.26.408 GFX_W3_SNOW Macro
C
#define GFX_W3_SNOW GFX_RGBConvert(255, 250, 250)
Description
This is macro GFX_W3_SNOW.
5.2.2.7.26.409 GFX_W3_SPRINGGREEN Macro
C
#define GFX_W3_SPRINGGREEN GFX_RGBConvert( 0, 255, 127)
Description
This is macro GFX_W3_SPRINGGREEN.
5.2.2.7.26.410 GFX_W3_STEELBLUE Macro
C
#define GFX_W3_STEELBLUE GFX_RGBConvert( 70, 130, 180)
Description
This is macro GFX_W3_STEELBLUE.
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5.2.2.7.26.411 GFX_W3_TAN Macro
C
#define GFX_W3_TAN GFX_RGBConvert(210, 180, 140)
Description
This is macro GFX_W3_TAN.
5.2.2.7.26.412 GFX_W3_TEAL Macro
C
#define GFX_W3_TEAL GFX_RGBConvert( 0, 128, 128)
Description
This is macro GFX_W3_TEAL.
5.2.2.7.26.413 GFX_W3_THISTLE Macro
C
#define GFX_W3_THISTLE GFX_RGBConvert(216, 191, 216)
Description
This is macro GFX_W3_THISTLE.
5.2.2.7.26.414 GFX_W3_TOMATO Macro
C
#define GFX_W3_TOMATO GFX_RGBConvert(255, 99, 71)
Description
This is macro GFX_W3_TOMATO.
5.2.2.7.26.415 GFX_W3_TURQUOISE Macro
C
#define GFX_W3_TURQUOISE GFX_RGBConvert( 64, 224, 208)
Description
This is macro GFX_W3_TURQUOISE.
5.2.2.7.26.416 GFX_W3_VIOLET Macro
C
#define GFX_W3_VIOLET GFX_RGBConvert(238, 130, 238)
Description
This is macro GFX_W3_VIOLET.
5.2.2.7.26.417 GFX_W3_WHEAT Macro
C
#define GFX_W3_WHEAT GFX_RGBConvert(245, 222, 179)
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Description
This is macro GFX_W3_WHEAT.
5.2.2.7.26.418 GFX_W3_WHITE Macro
C
#define GFX_W3_WHITE GFX_RGBConvert(255, 255, 255)
Description
This is macro GFX_W3_WHITE.
5.2.2.7.26.419 GFX_W3_WHITESMOKE Macro
C
#define GFX_W3_WHITESMOKE GFX_RGBConvert(245, 245, 245)
Description
This is macro GFX_W3_WHITESMOKE.
5.2.2.7.26.420 GFX_W3_YELLOW Macro
C
#define GFX_W3_YELLOW GFX_RGBConvert(255, 255, 0)
Description
This is macro GFX_W3_YELLOW.
5.2.2.7.26.421 GFX_W3_YELLOWGREEN Macro
C
#define GFX_W3_YELLOWGREEN GFX_RGBConvert(154, 205, 50)
Description
This is macro GFX_W3_YELLOWGREEN.
5.2.2.7.26.422 GFX_X11_ALICE_BLUE Macro
C
#define GFX_X11_ALICE_BLUE GFX_RGBConvert(0xF0, 0xF8, 0xFF)
Description
This is macro GFX_X11_ALICE_BLUE.
5.2.2.7.26.423 GFX_X11_ANTIQUE_WHITE Macro
C
#define GFX_X11_ANTIQUE_WHITE GFX_RGBConvert(0xFA, 0xEB, 0xD7)
Description
This is macro GFX_X11_ANTIQUE_WHITE.
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5.2.2.7.26.424 GFX_X11_AQUA Macro
C
#define GFX_X11_AQUA GFX_RGBConvert(0x00, 0xFF, 0xFF)
Description
This is macro GFX_X11_AQUA.
5.2.2.7.26.425 GFX_X11_AQUAMARINE Macro
C
#define GFX_X11_AQUAMARINE GFX_RGBConvert(0x7F, 0xFF, 0xD4)
Description
This is macro GFX_X11_AQUAMARINE.
5.2.2.7.26.426 GFX_X11_AZURE Macro
C
#define GFX_X11_AZURE GFX_RGBConvert(0xF0, 0xFF, 0xFF)
Description
This is macro GFX_X11_AZURE.
5.2.2.7.26.427 GFX_X11_BEIGE Macro
C
#define GFX_X11_BEIGE GFX_RGBConvert(0xF5, 0xF5, 0xDC)
Description
This is macro GFX_X11_BEIGE.
5.2.2.7.26.428 GFX_X11_BISQUE Macro
C
#define GFX_X11_BISQUE GFX_RGBConvert(0xFF, 0xE4, 0xC4)
Description
This is macro GFX_X11_BISQUE.
5.2.2.7.26.429 GFX_X11_BLACK Macro
C
#define GFX_X11_BLACK GFX_RGBConvert(0x00, 0x00, 0x00)
Description
This is macro GFX_X11_BLACK.
5.2.2.7.26.430 GFX_X11_BLANCHED_ALMOND Macro
C
#define GFX_X11_BLANCHED_ALMOND GFX_RGBConvert(0xFF, 0xEB, 0xCD)
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Description
This is macro GFX_X11_BLANCHED_ALMOND.
5.2.2.7.26.431 GFX_X11_BLUE Macro
C
#define GFX_X11_BLUE GFX_RGBConvert(0x00, 0x00, 0xFF)
Description
This is macro GFX_X11_BLUE.
5.2.2.7.26.432 GFX_X11_BLUE_VIOLET Macro
C
#define GFX_X11_BLUE_VIOLET GFX_RGBConvert(0x8A, 0x2B, 0xE2)
Description
This is macro GFX_X11_BLUE_VIOLET.
5.2.2.7.26.433 GFX_X11_BROWN Macro
C
#define GFX_X11_BROWN GFX_RGBConvert(0xA5, 0x2A, 0x2A)
Description
This is macro GFX_X11_BROWN.
5.2.2.7.26.434 GFX_X11_BURLY_WOOD Macro
C
#define GFX_X11_BURLY_WOOD GFX_RGBConvert(0xDE, 0xB8, 0x87)
Description
This is macro GFX_X11_BURLY_WOOD.
5.2.2.7.26.435 GFX_X11_CADEL_BLUE Macro
C
#define GFX_X11_CADEL_BLUE GFX_RGBConvert(0x5F, 0x9E, 0xA0)
Description
This is macro GFX_X11_CADEL_BLUE.
5.2.2.7.26.436 GFX_X11_CHARTEUSE Macro
C
#define GFX_X11_CHARTEUSE GFX_RGBConvert(0x7F, 0xFF, 0x00)
Description
This is macro GFX_X11_CHARTEUSE.
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5.2.2.7.26.437 GFX_X11_CHOCOLATE Macro
C
#define GFX_X11_CHOCOLATE GFX_RGBConvert(0xD2, 0x69, 0x1E)
Description
This is macro GFX_X11_CHOCOLATE.
5.2.2.7.26.438 GFX_X11_CORAL Macro
C
#define GFX_X11_CORAL GFX_RGBConvert(0xFF, 0x7F, 0x50)
Description
This is macro GFX_X11_CORAL.
5.2.2.7.26.439 GFX_X11_CORNFLOWER_BLUE Macro
C
#define GFX_X11_CORNFLOWER_BLUE GFX_RGBConvert(0x64, 0x95, 0xED)
Description
This is macro GFX_X11_CORNFLOWER_BLUE.
5.2.2.7.26.440 GFX_X11_CORNSILK Macro
C
#define GFX_X11_CORNSILK GFX_RGBConvert(0xFF, 0xF8, 0xDC)
Description
X11: Brown Colors
5.2.2.7.26.441 GFX_X11_CRIMSON Macro
C
#define GFX_X11_CRIMSON GFX_RGBConvert(0xDC, 0x14, 0x3C)
Description
This is macro GFX_X11_CRIMSON.
5.2.2.7.26.442 GFX_X11_CYAN Macro
C
#define GFX_X11_CYAN GFX_RGBConvert(0x00, 0xFF, 0xFF)
Description
This is macro GFX_X11_CYAN.
5.2.2.7.26.443 GFX_X11_DARK_BLUE Macro
C
#define GFX_X11_DARK_BLUE GFX_RGBConvert(0x00, 0x00, 0x8B)
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Description
This is macro GFX_X11_DARK_BLUE.
5.2.2.7.26.444 GFX_X11_DARK_CYAN Macro
C
#define GFX_X11_DARK_CYAN GFX_RGBConvert(0x00, 0x8B, 0x8B)
Description
This is macro GFX_X11_DARK_CYAN.
5.2.2.7.26.445 GFX_X11_DARK_GOLDENROD Macro
C
#define GFX_X11_DARK_GOLDENROD GFX_RGBConvert(0xB8, 0x86, 0x0B)
Description
This is macro GFX_X11_DARK_GOLDENROD.
5.2.2.7.26.446 GFX_X11_DARK_GREEN Macro
C
#define GFX_X11_DARK_GREEN GFX_RGBConvert(0x00, 0x64, 0x00)
Description
This is macro GFX_X11_DARK_GREEN.
5.2.2.7.26.447 GFX_X11_DARK_GREY Macro
C
#define GFX_X11_DARK_GREY GFX_RGBConvert(0xA9, 0xA9, 0xA9)
Description
This is macro GFX_X11_DARK_GREY.
5.2.2.7.26.448 GFX_X11_DARK_KHAKI Macro
C
#define GFX_X11_DARK_KHAKI GFX_RGBConvert(0xBD, 0xB7, 0x6B)
Description
This is macro GFX_X11_DARK_KHAKI.
5.2.2.7.26.449 GFX_X11_DARK_MAGENTA Macro
C
#define GFX_X11_DARK_MAGENTA GFX_RGBConvert(0x8B, 0x00, 0x8B)
Description
This is macro GFX_X11_DARK_MAGENTA.
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5.2.2.7.26.450 GFX_X11_DARK_OLIVE_GREEN Macro
C
#define GFX_X11_DARK_OLIVE_GREEN GFX_RGBConvert(0x55, 0x6B, 0x2F)
Description
X11: Green Colors
5.2.2.7.26.451 GFX_X11_DARK_ORANGE Macro
C
#define GFX_X11_DARK_ORANGE GFX_RGBConvert(0xFF, 0x8C, 0x00)
Description
This is macro GFX_X11_DARK_ORANGE.
5.2.2.7.26.452 GFX_X11_DARK_ORCHID Macro
C
#define GFX_X11_DARK_ORCHID GFX_RGBConvert(0x99, 0x32, 0xCC)
Description
This is macro GFX_X11_DARK_ORCHID.
5.2.2.7.26.453 GFX_X11_DARK_RED Macro
C
#define GFX_X11_DARK_RED GFX_RGBConvert(0x8B, 0x00, 0x00)
Description
This is macro GFX_X11_DARK_RED.
5.2.2.7.26.454 GFX_X11_DARK_SALMON Macro
C
#define GFX_X11_DARK_SALMON GFX_RGBConvert(0xEA, 0x96, 0x7A)
Description
This is macro GFX_X11_DARK_SALMON.
5.2.2.7.26.455 GFX_X11_DARK_SEA_GREEN Macro
C
#define GFX_X11_DARK_SEA_GREEN GFX_RGBConvert(0x8F, 0xBC, 0x8F)
Description
This is macro GFX_X11_DARK_SEA_GREEN.
5.2.2.7.26.456 GFX_X11_DARK_SLATE_BLUE Macro
C
#define GFX_X11_DARK_SLATE_BLUE GFX_RGBConvert(0x48, 0x3D, 0x8B)
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Description
This is macro GFX_X11_DARK_SLATE_BLUE.
5.2.2.7.26.457 GFX_X11_DARK_SLATE_GREY Macro
C
#define GFX_X11_DARK_SLATE_GREY GFX_RGBConvert(0x2F, 0x4F, 0x4F)
Description
This is macro GFX_X11_DARK_SLATE_GREY.
5.2.2.7.26.458 GFX_X11_DARK_TURQUOISE Macro
C
#define GFX_X11_DARK_TURQUOISE GFX_RGBConvert(0x00, 0xCE, 0xD1)
Description
This is macro GFX_X11_DARK_TURQUOISE.
5.2.2.7.26.459 GFX_X11_DARK_VIOLET Macro
C
#define GFX_X11_DARK_VIOLET GFX_RGBConvert(0x94, 0x00, 0xD3)
Description
This is macro GFX_X11_DARK_VIOLET.
5.2.2.7.26.460 GFX_X11_DEEP_PINK Macro
C
#define GFX_X11_DEEP_PINK GFX_RGBConvert(0xFF, 0x14, 0x93)
Description
This is macro GFX_X11_DEEP_PINK.
5.2.2.7.26.461 GFX_X11_DEEP_SKY_BLUE Macro
C
#define GFX_X11_DEEP_SKY_BLUE GFX_RGBConvert(0x00, 0xBF, 0xFF)
Description
This is macro GFX_X11_DEEP_SKY_BLUE.
5.2.2.7.26.462 GFX_X11_DIM_GREY Macro
C
#define GFX_X11_DIM_GREY GFX_RGBConvert(0x69, 0x69, 0x69)
Description
This is macro GFX_X11_DIM_GREY.
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5.2.2.7.26.463 GFX_X11_DODGER_BLUE Macro
C
#define GFX_X11_DODGER_BLUE GFX_RGBConvert(0x1E, 0x90, 0xFF)
Description
This is macro GFX_X11_DODGER_BLUE.
5.2.2.7.26.464 GFX_X11_FIRE_BRICK Macro
C
#define GFX_X11_FIRE_BRICK GFX_RGBConvert(0xB2, 0x22, 0x22)
Description
This is macro GFX_X11_FIRE_BRICK.
5.2.2.7.26.465 GFX_X11_FLORAL_WHITE Macro
C
#define GFX_X11_FLORAL_WHITE GFX_RGBConvert(0xFF, 0xFA, 0xF0)
Description
This is macro GFX_X11_FLORAL_WHITE.
5.2.2.7.26.466 GFX_X11_FOREST_GREEN Macro
C
#define GFX_X11_FOREST_GREEN GFX_RGBConvert(0x22, 0x8B, 0x22)
Description
This is macro GFX_X11_FOREST_GREEN.
5.2.2.7.26.467 GFX_X11_FUCHSIA Macro
C
#define GFX_X11_FUCHSIA GFX_RGBConvert(0xFF, 0x00, 0xFF)
Description
This is macro GFX_X11_FUCHSIA.
5.2.2.7.26.468 GFX_X11_GAINSBORO Macro
C
#define GFX_X11_GAINSBORO GFX_RGBConvert(0xDC, 0xDC, 0xDC)
Description
This is macro GFX_X11_GAINSBORO.
5.2.2.7.26.469 GFX_X11_GHOST_WHITE Macro
C
#define GFX_X11_GHOST_WHITE GFX_RGBConvert(0xF8, 0xF8, 0xFF)
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Description
This is macro GFX_X11_GHOST_WHITE.
5.2.2.7.26.470 GFX_X11_GOLD Macro
C
#define GFX_X11_GOLD GFX_RGBConvert(0xFF, 0xD7, 0x00)
Description
This is macro GFX_X11_GOLD.
5.2.2.7.26.471 GFX_X11_GOLDENROD Macro
C
#define GFX_X11_GOLDENROD GFX_RGBConvert(0xDA, 0xA5, 0x20)
Description
This is macro GFX_X11_GOLDENROD.
5.2.2.7.26.472 GFX_X11_GREEN Macro
C
#define GFX_X11_GREEN GFX_RGBConvert(0x00, 0x80, 0x00)
Description
This is macro GFX_X11_GREEN.
5.2.2.7.26.473 GFX_X11_GREEN_YELLOW Macro
C
#define GFX_X11_GREEN_YELLOW GFX_RGBConvert(0xAD, 0xFF, 0x2F)
Description
This is macro GFX_X11_GREEN_YELLOW.
5.2.2.7.26.474 GFX_X11_GREY Macro
C
#define GFX_X11_GREY GFX_RGBConvert(0x80, 0x80, 0x80)
Description
This is macro GFX_X11_GREY.
5.2.2.7.26.475 GFX_X11_HONEYDEW Macro
C
#define GFX_X11_HONEYDEW GFX_RGBConvert(0xF0, 0xFF, 0xF0)
Description
This is macro GFX_X11_HONEYDEW.
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5.2.2.7.26.476 GFX_X11_HOT_PINK Macro
C
#define GFX_X11_HOT_PINK GFX_RGBConvert(0xFF, 0x69, 0xB4)
Description
This is macro GFX_X11_HOT_PINK.
5.2.2.7.26.477 GFX_X11_INDIAN_RED Macro
C
#define GFX_X11_INDIAN_RED GFX_RGBConvert(0xCD, 0x5C, 0x5C)
Description
This is macro GFX_X11_INDIAN_RED.
5.2.2.7.26.478 GFX_X11_INDIGO Macro
C
#define GFX_X11_INDIGO GFX_RGBConvert(0x4B, 0x00, 0x82)
Description
This is macro GFX_X11_INDIGO.
5.2.2.7.26.479 GFX_X11_IVORY Macro
C
#define GFX_X11_IVORY GFX_RGBConvert(0xFF, 0xFF, 0xF0)
Description
This is macro GFX_X11_IVORY.
5.2.2.7.26.480 GFX_X11_KHAKI Macro
C
#define GFX_X11_KHAKI GFX_RGBConvert(0xF0, 0xE6, 0x8C)
Description
This is macro GFX_X11_KHAKI.
5.2.2.7.26.481 GFX_X11_LAVENDER Macro
C
#define GFX_X11_LAVENDER GFX_RGBConvert(0xE6, 0xE6, 0xFA)
Description
X11: BLUE COLORS
5.2.2.7.26.482 GFX_X11_LAVENDOR_BLUSH Macro
C
#define GFX_X11_LAVENDOR_BLUSH GFX_RGBConvert(0xFF, 0xF0, 0xF5)
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Description
This is macro GFX_X11_LAVENDOR_BLUSH.
5.2.2.7.26.483 GFX_X11_LAWN_GREEN Macro
C
#define GFX_X11_LAWN_GREEN GFX_RGBConvert(0x7C, 0xFC, 0x00)
Description
This is macro GFX_X11_LAWN_GREEN.
5.2.2.7.26.484 GFX_X11_LEMON_CHIFFON Macro
C
#define GFX_X11_LEMON_CHIFFON GFX_RGBConvert(0xFF, 0xFA, 0xCD)
Description
This is macro GFX_X11_LEMON_CHIFFON.
5.2.2.7.26.485 GFX_X11_LIGHT_BLUE Macro
C
#define GFX_X11_LIGHT_BLUE GFX_RGBConvert(0xAD, 0xD8, 0xE6)
Description
This is macro GFX_X11_LIGHT_BLUE.
5.2.2.7.26.486 GFX_X11_LIGHT_CAROL Macro
C
#define GFX_X11_LIGHT_CAROL GFX_RGBConvert(0xF0, 0x80, 0x80)
Description
This is macro GFX_X11_LIGHT_CAROL.
5.2.2.7.26.487 GFX_X11_LIGHT_CYAN Macro
C
#define GFX_X11_LIGHT_CYAN GFX_RGBConvert(0xE0, 0xFF, 0xFF)
Description
This is macro GFX_X11_LIGHT_CYAN.
5.2.2.7.26.488 GFX_X11_LIGHT_GOLDENROD_YELLOW Macro
C
#define GFX_X11_LIGHT_GOLDENROD_YELLOW GFX_RGBConvert(0xFA, 0xFA, 0xD2)
Description
This is macro GFX_X11_LIGHT_GOLDENROD_YELLOW.
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5.2.2.7.26.489 GFX_X11_LIGHT_GRAY Macro
C
#define GFX_X11_LIGHT_GRAY GFX_RGBConvert(0xD3, 0xD3, 0xD3)
Description
This is macro GFX_X11_LIGHT_GRAY.
5.2.2.7.26.490 GFX_X11_LIGHT_GREEN Macro
C
#define GFX_X11_LIGHT_GREEN GFX_RGBConvert(0x90, 0xEE, 0x90)
Description
This is macro GFX_X11_LIGHT_GREEN.
5.2.2.7.26.491 GFX_X11_LIGHT_PINK Macro
C
#define GFX_X11_LIGHT_PINK GFX_RGBConvert(0xFF, 0xB6, 0xC1)
Description
This is macro GFX_X11_LIGHT_PINK.
5.2.2.7.26.492 GFX_X11_LIGHT_SALMON Macro
C
#define GFX_X11_LIGHT_SALMON GFX_RGBConvert(0xFF, 0xA0, 0x7A)
Description
X11: Red Colors
5.2.2.7.26.493 GFX_X11_LIGHT_SEA_GREEN Macro
C
#define GFX_X11_LIGHT_SEA_GREEN GFX_RGBConvert(0x20, 0xB2, 0xAA)
Description
This is macro GFX_X11_LIGHT_SEA_GREEN.
5.2.2.7.26.494 GFX_X11_LIGHT_SKY_BLUE Macro
C
#define GFX_X11_LIGHT_SKY_BLUE GFX_RGBConvert(0x87, 0xCE, 0xFA)
Description
This is macro GFX_X11_LIGHT_SKY_BLUE.
5.2.2.7.26.495 GFX_X11_LIGHT_SLATE_GREY Macro
C
#define GFX_X11_LIGHT_SLATE_GREY GFX_RGBConvert(0x77, 0x88, 0x99)
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Description
This is macro GFX_X11_LIGHT_SLATE_GREY.
5.2.2.7.26.496 GFX_X11_LIGHT_STEEL_BLUE Macro
C
#define GFX_X11_LIGHT_STEEL_BLUE GFX_RGBConvert(0xB0, 0xC4, 0xDE)
Description
X11: BLUE COLORS
5.2.2.7.26.497 GFX_X11_LIGHT_YELLOW Macro
C
#define GFX_X11_LIGHT_YELLOW GFX_RGBConvert(0xFF, 0xFF, 0xE0)
Description
This is macro GFX_X11_LIGHT_YELLOW.
5.2.2.7.26.498 GFX_X11_LIME Macro
C
#define GFX_X11_LIME GFX_RGBConvert(0x00, 0xFF, 0x00)
Description
This is macro GFX_X11_LIME.
5.2.2.7.26.499 GFX_X11_LIME_GREEN Macro
C
#define GFX_X11_LIME_GREEN GFX_RGBConvert(0x32, 0xCD, 0x32)
Description
This is macro GFX_X11_LIME_GREEN.
5.2.2.7.26.500 GFX_X11_LINEN Macro
C
#define GFX_X11_LINEN GFX_RGBConvert(0xFA, 0xF0, 0xE6)
Description
This is macro GFX_X11_LINEN.
5.2.2.7.26.501 GFX_X11_MAGENTA Macro
C
#define GFX_X11_MAGENTA GFX_RGBConvert(0xFF, 0x00, 0xFF)
Description
This is macro GFX_X11_MAGENTA.
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5.2.2.7.26.502 GFX_X11_MARRON Macro
C
#define GFX_X11_MARRON GFX_RGBConvert(0x80, 0x00, 0x00)
Description
This is macro GFX_X11_MARRON.
5.2.2.7.26.503 GFX_X11_MEDIUM_AQUAMARINE Macro
C
#define GFX_X11_MEDIUM_AQUAMARINE GFX_RGBConvert(0x66, 0xCD, 0xAA)
Description
X11: CYAN COLORS
5.2.2.7.26.504 GFX_X11_MEDIUM_BLUE Macro
C
#define GFX_X11_MEDIUM_BLUE GFX_RGBConvert(0x00, 0x00, 0xCD)
Description
This is macro GFX_X11_MEDIUM_BLUE.
5.2.2.7.26.505 GFX_X11_MEDIUM_ORCHID Macro
C
#define GFX_X11_MEDIUM_ORCHID GFX_RGBConvert(0xBA, 0x55, 0xD3)
Description
This is macro GFX_X11_MEDIUM_ORCHID.
5.2.2.7.26.506 GFX_X11_MEDIUM_PURPLE Macro
C
#define GFX_X11_MEDIUM_PURPLE GFX_RGBConvert(0x93, 0x70, 0xDB)
Description
This is macro GFX_X11_MEDIUM_PURPLE.
5.2.2.7.26.507 GFX_X11_MEDIUM_SEA_GREEN Macro
C
#define GFX_X11_MEDIUM_SEA_GREEN GFX_RGBConvert(0x3C, 0xB3, 0x71)
Description
This is macro GFX_X11_MEDIUM_SEA_GREEN.
5.2.2.7.26.508 GFX_X11_MEDIUM_SLATE_BLUE Macro
C
#define GFX_X11_MEDIUM_SLATE_BLUE GFX_RGBConvert(0x7B, 0x68, 0xEE)
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Description
This is macro GFX_X11_MEDIUM_SLATE_BLUE.
5.2.2.7.26.509 GFX_X11_MEDIUM_SPRING_GREEN Macro
C
#define GFX_X11_MEDIUM_SPRING_GREEN GFX_RGBConvert(0x00, 0xFA, 0x9A)
Description
This is macro GFX_X11_MEDIUM_SPRING_GREEN.
5.2.2.7.26.510 GFX_X11_MEDIUM_TURQUOISE Macro
C
#define GFX_X11_MEDIUM_TURQUOISE GFX_RGBConvert(0x48, 0xD1, 0xCC)
Description
This is macro GFX_X11_MEDIUM_TURQUOISE.
5.2.2.7.26.511 GFX_X11_MEDIUM_VIOLET_RED Macro
C
#define GFX_X11_MEDIUM_VIOLET_RED GFX_RGBConvert(0xC7, 0x15, 0x85)
Description
This is macro GFX_X11_MEDIUM_VIOLET_RED.
5.2.2.7.26.512 GFX_X11_MIDNIGHT_BLUE Macro
C
#define GFX_X11_MIDNIGHT_BLUE GFX_RGBConvert(0x19, 0x19, 0x70)
Description
This is macro GFX_X11_MIDNIGHT_BLUE.
5.2.2.7.26.513 GFX_X11_MINT_CREAM Macro
C
#define GFX_X11_MINT_CREAM GFX_RGBConvert(0xF5, 0xFF, 0xFA)
Description
This is macro GFX_X11_MINT_CREAM.
5.2.2.7.26.514 GFX_X11_MISTY_ROSE Macro
C
#define GFX_X11_MISTY_ROSE GFX_RGBConvert(0xFF, 0xE4, 0xE1)
Description
This is macro GFX_X11_MISTY_ROSE.
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5.2.2.7.26.515 GFX_X11_MOCCASIN Macro
C
#define GFX_X11_MOCCASIN GFX_RGBConvert(0xFF, 0xE4, 0xB5)
Description
This is macro GFX_X11_MOCCASIN.
5.2.2.7.26.516 GFX_X11_NAVAJO_WHITE Macro
C
#define GFX_X11_NAVAJO_WHITE GFX_RGBConvert(0xFF, 0xDE, 0xAD)
Description
This is macro GFX_X11_NAVAJO_WHITE.
5.2.2.7.26.517 GFX_X11_NAVY Macro
C
#define GFX_X11_NAVY GFX_RGBConvert(0x00, 0x00, 0x80)
Description
This is macro GFX_X11_NAVY.
5.2.2.7.26.518 GFX_X11_OLD_LACE Macro
C
#define GFX_X11_OLD_LACE GFX_RGBConvert(0xFD, 0xF5, 0xE6)
Description
This is macro GFX_X11_OLD_LACE.
5.2.2.7.26.519 GFX_X11_OLIVE Macro
C
#define GFX_X11_OLIVE GFX_RGBConvert(0x80, 0x80, 0x00)
Description
This is macro GFX_X11_OLIVE.
5.2.2.7.26.520 GFX_X11_OLIVE_DRAB Macro
C
#define GFX_X11_OLIVE_DRAB GFX_RGBConvert(0x6B, 0x8E, 0x23)
Description
This is macro GFX_X11_OLIVE_DRAB.
5.2.2.7.26.521 GFX_X11_ORANGE Macro
C
#define GFX_X11_ORANGE GFX_RGBConvert(0xFF, 0xA5, 0x00)
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Description
This is macro GFX_X11_ORANGE.
5.2.2.7.26.522 GFX_X11_ORANGE_RED Macro
C
#define GFX_X11_ORANGE_RED GFX_RGBConvert(0xFF, 0x45, 0x00)
Description
X11: Orange Colors
5.2.2.7.26.523 GFX_X11_ORCHID Macro
C
#define GFX_X11_ORCHID GFX_RGBConvert(0xDA, 0x70, 0xD6)
Description
This is macro GFX_X11_ORCHID.
5.2.2.7.26.524 GFX_X11_PALE_GOLDENROD Macro
C
#define GFX_X11_PALE_GOLDENROD GFX_RGBConvert(0xEE, 0xE8, 0xAA)
Description
This is macro GFX_X11_PALE_GOLDENROD.
5.2.2.7.26.525 GFX_X11_PALE_GREEN Macro
C
#define GFX_X11_PALE_GREEN GFX_RGBConvert(0x98, 0xFB, 0x98)
Description
This is macro GFX_X11_PALE_GREEN.
5.2.2.7.26.526 GFX_X11_PALE_TURQUOISE Macro
C
#define GFX_X11_PALE_TURQUOISE GFX_RGBConvert(0xAF, 0xEE, 0xEE)
Description
This is macro GFX_X11_PALE_TURQUOISE.
5.2.2.7.26.527 GFX_X11_PALE_VIOLET_RED Macro
C
#define GFX_X11_PALE_VIOLET_RED GFX_RGBConvert(0xDB, 0x70, 0x93)
Description
This is macro GFX_X11_PALE_VIOLET_RED.
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5.2.2.7.26.528 GFX_X11_PAPAYA_WHIP Macro
C
#define GFX_X11_PAPAYA_WHIP GFX_RGBConvert(0xFF, 0xEF, 0xD5)
Description
This is macro GFX_X11_PAPAYA_WHIP.
5.2.2.7.26.529 GFX_X11_PEACH_PUFF Macro
C
#define GFX_X11_PEACH_PUFF GFX_RGBConvert(0xFF, 0xDA, 0xB9)
Description
This is macro GFX_X11_PEACH_PUFF.
5.2.2.7.26.530 GFX_X11_PERU Macro
C
#define GFX_X11_PERU GFX_RGBConvert(0xCD, 0x85, 0x3F)
Description
This is macro GFX_X11_PERU.
5.2.2.7.26.531 GFX_X11_PINK Macro
C
#define GFX_X11_PINK GFX_RGBConvert(0xFF, 0xC0, 0xCB)
Description
X11: Pink Colors
5.2.2.7.26.532 GFX_X11_PLUM Macro
C
#define GFX_X11_PLUM GFX_RGBConvert(0xDD, 0xA0, 0xDD)
Description
This is macro GFX_X11_PLUM.
5.2.2.7.26.533 GFX_X11_POWDER_BLUE Macro
C
#define GFX_X11_POWDER_BLUE GFX_RGBConvert(0xB0, 0xE0, 0xE6)
Description
This is macro GFX_X11_POWDER_BLUE.
5.2.2.7.26.534 GFX_X11_PURPLE Macro
C
#define GFX_X11_PURPLE GFX_RGBConvert(0x80, 0x00, 0x80)
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Description
This is macro GFX_X11_PURPLE.
5.2.2.7.26.535 GFX_X11_RED Macro
C
#define GFX_X11_RED GFX_RGBConvert(0xFF, 0x00, 0x00)
Description
This is macro GFX_X11_RED.
5.2.2.7.26.536 GFX_X11_ROSY_BROWN Macro
C
#define GFX_X11_ROSY_BROWN GFX_RGBConvert(0xBc, 0x8F, 0x8F)
Description
This is macro GFX_X11_ROSY_BROWN.
5.2.2.7.26.537 GFX_X11_ROYAL_BLUE Macro
C
#define GFX_X11_ROYAL_BLUE GFX_RGBConvert(0x41, 0x69, 0xE1)
Description
This is macro GFX_X11_ROYAL_BLUE.
5.2.2.7.26.538 GFX_X11_SADDLE_BROWN Macro
C
#define GFX_X11_SADDLE_BROWN GFX_RGBConvert(0x8B, 0x45, 0x13)
Description
This is macro GFX_X11_SADDLE_BROWN.
5.2.2.7.26.539 GFX_X11_SALMON Macro
C
#define GFX_X11_SALMON GFX_RGBConvert(0xFA, 0x80, 0x72)
Description
This is macro GFX_X11_SALMON.
5.2.2.7.26.540 GFX_X11_SANDY_BROWN Macro
C
#define GFX_X11_SANDY_BROWN GFX_RGBConvert(0xF4, 0xA4, 0x60)
Description
This is macro GFX_X11_SANDY_BROWN.
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5.2.2.7.26.541 GFX_X11_SEA_GREEN Macro
C
#define GFX_X11_SEA_GREEN GFX_RGBConvert(0x2E, 0x8B, 0x57)
Description
This is macro GFX_X11_SEA_GREEN.
5.2.2.7.26.542 GFX_X11_SEASHELL Macro
C
#define GFX_X11_SEASHELL GFX_RGBConvert(0xFF, 0xF5, 0xEE)
Description
This is macro GFX_X11_SEASHELL.
5.2.2.7.26.543 GFX_X11_SIENNA Macro
C
#define GFX_X11_SIENNA GFX_RGBConvert(0xA0, 0x52, 0x2D)
Description
This is macro GFX_X11_SIENNA.
5.2.2.7.26.544 GFX_X11_SILVER Macro
C
#define GFX_X11_SILVER GFX_RGBConvert(0xC0, 0xC0, 0xC0)
Description
This is macro GFX_X11_SILVER.
5.2.2.7.26.545 GFX_X11_SKY_BLUE Macro
C
#define GFX_X11_SKY_BLUE GFX_RGBConvert(0x87, 0xCE, 0xEB)
Description
This is macro GFX_X11_SKY_BLUE.
5.2.2.7.26.546 GFX_X11_SLATE_BLUE Macro
C
#define GFX_X11_SLATE_BLUE GFX_RGBConvert(0x6A, 0x5A, 0xCD)
Description
This is macro GFX_X11_SLATE_BLUE.
5.2.2.7.26.547 GFX_X11_SLATE_GREY Macro
C
#define GFX_X11_SLATE_GREY GFX_RGBConvert(0x70, 0x80, 0x90)
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Description
This is macro GFX_X11_SLATE_GREY.
5.2.2.7.26.548 GFX_X11_SNOW Macro
C
#define GFX_X11_SNOW GFX_RGBConvert(0xFF, 0xFA, 0xFA)
Description
This is macro GFX_X11_SNOW.
5.2.2.7.26.549 GFX_X11_SPRING_GREEN Macro
C
#define GFX_X11_SPRING_GREEN GFX_RGBConvert(0x00, 0xFF, 0x7F)
Description
This is macro GFX_X11_SPRING_GREEN.
5.2.2.7.26.550 GFX_X11_STEEL_BLUE Macro
C
#define GFX_X11_STEEL_BLUE GFX_RGBConvert(0x46, 0x82, 0xB4)
Description
This is macro GFX_X11_STEEL_BLUE.
5.2.2.7.26.551 GFX_X11_TAN Macro
C
#define GFX_X11_TAN GFX_RGBConvert(0xD2, 0xB4, 0x8C)
Description
This is macro GFX_X11_TAN.
5.2.2.7.26.552 GFX_X11_TEAL Macro
C
#define GFX_X11_TEAL GFX_RGBConvert(0x00, 0x80, 0x80)
Description
This is macro GFX_X11_TEAL.
5.2.2.7.26.553 GFX_X11_THISTLE Macro
C
#define GFX_X11_THISTLE GFX_RGBConvert(0xD8, 0xBF, 0xD8)
Description
This is macro GFX_X11_THISTLE.
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5.2.2.7.26.554 GFX_X11_TOMATO Macro
C
#define GFX_X11_TOMATO GFX_RGBConvert(0xFF, 0x63, 0x47)
Description
This is macro GFX_X11_TOMATO.
5.2.2.7.26.555 GFX_X11_TURQUOISE Macro
C
#define GFX_X11_TURQUOISE GFX_RGBConvert(0x40, 0xE0, 0xD0)
Description
This is macro GFX_X11_TURQUOISE.
5.2.2.7.26.556 GFX_X11_VIOLET Macro
C
#define GFX_X11_VIOLET GFX_RGBConvert(0xEE, 0x82, 0xEE)
Description
This is macro GFX_X11_VIOLET.
5.2.2.7.26.557 GFX_X11_WHEAT Macro
C
#define GFX_X11_WHEAT GFX_RGBConvert(0xF5, 0xDE, 0xB3)
Description
This is macro GFX_X11_WHEAT.
5.2.2.7.26.558 GFX_X11_WHITE Macro
C
#define GFX_X11_WHITE GFX_RGBConvert(0xFF, 0xFF, 0xFF)
Description
X11: WHITE/GRAY/BLACK COLORS
5.2.2.7.26.559 GFX_X11_WHITE_SMOKE Macro
C
#define GFX_X11_WHITE_SMOKE GFX_RGBConvert(0xF5, 0xF5, 0xF5)
Description
This is macro GFX_X11_WHITE_SMOKE.
5.2.2.7.26.560 GFX_X11_YELLOW Macro
C
#define GFX_X11_YELLOW GFX_RGBConvert(0xFF, 0xFF, 0x00)
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Description
X11: Yellow Colors
5.2.2.7.26.561 GFX_X11_YELLOW_GREEN Macro
C
#define GFX_X11_YELLOW_GREEN GFX_RGBConvert(0x9A, 0xCD, 0x32)
Description
This is macro GFX_X11_YELLOW_GREEN.
5.2.2.7.26.562 GFX_XCHAR Macro
C
#define GFX_XCHAR char
Description
GFX_CONFIG_FONT_CHAR_SIZE
This configuration sets the text character size used in the library.
To enable support for unicode fonts, GFX_CONFIG_FONT_CHAR_SIZE must be defined as 16 (size is 16 bits). For standard
ascii fonts, this can be defined as 8. This changes the GFX_XCHAR definition. See GFX_XCHAR for details.
Set in configuration GFX_XCHAR Description
#define GFX_CONFIG_FONT_CHAR_SIZE
16
#define GFX_XCHAR
uint16_t
Use multiuint8_t characters (0-2^16 range).
#define GFX_CONFIG_FONT_CHAR_SIZE 8 #define GFX_XCHAR uint8_t Use multiuint8_t characters (0-255 range).
Remarks
None.
5.2.2.7.26.563 GOLD Macro
C
#define GOLD GFX_RGBConvert(255, 215, 0)
Description
This is macro GOLD.
5.2.2.7.26.564 GRAPHICS_LIBRARY_VERSION Macro
C
#define GRAPHICS_LIBRARY_VERSION 0x0400
Description
//////////////////// GRAPHICS_LIBRARY_VERSION ///////////////////// MSB is version, LSB is subversion
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5.2.2.7.26.565 GRAY000 Macro
C
#define GRAY000 0
Description
This is macro GRAY000.
5.2.2.7.26.566 GRAY001 Macro
C
#define GRAY001 1
Description
This is macro GRAY001.
5.2.2.7.26.567 GRAY002 Macro
C
#define GRAY002 2
Description
This is macro GRAY002.
5.2.2.7.26.568 GRAY003 Macro
C
#define GRAY003 3
Description
This is macro GRAY003.
5.2.2.7.26.569 GRAY004 Macro
C
#define GRAY004 4
Description
This is macro GRAY004.
5.2.2.7.26.570 GRAY005 Macro
C
#define GRAY005 5
Description
This is macro GRAY005.
5.2.2.7.26.571 GRAY006 Macro
C
#define GRAY006 6
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Description
This is macro GRAY006.
5.2.2.7.26.572 GRAY007 Macro
C
#define GRAY007 7
Description
This is macro GRAY007.
5.2.2.7.26.573 GRAY008 Macro
C
#define GRAY008 8
Description
This is macro GRAY008.
5.2.2.7.26.574 GRAY009 Macro
C
#define GRAY009 9
Description
This is macro GRAY009.
5.2.2.7.26.575 GRAY010 Macro
C
#define GRAY010 GFX_RGBConvert(10, 10, 10)
Description
This is macro GRAY010.
5.2.2.7.26.576 GRAY011 Macro
C
#define GRAY011 11
Description
This is macro GRAY011.
5.2.2.7.26.577 GRAY012 Macro
C
#define GRAY012 12
Description
This is macro GRAY012.
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5.2.2.7.26.578 GRAY013 Macro
C
#define GRAY013 13
Description
This is macro GRAY013.
5.2.2.7.26.579 GRAY014 Macro
C
#define GRAY014 14
Description
This is macro GRAY014.
5.2.2.7.26.580 GRAY015 Macro
C
#define GRAY015 15
Description
This is macro GRAY015.
5.2.2.7.26.581 GRAY032 Macro
C
#define GRAY032 GFX_RGBConvert(32, 32, 32)
Description
This is macro GRAY032.
5.2.2.7.26.582 GRAY096 Macro
C
#define GRAY096 GFX_RGBConvert(96, 96, 96)
Description
This is macro GRAY096.
5.2.2.7.26.583 GRAY128 Macro
C
#define GRAY128 GFX_RGBConvert(128, 128, 128)
Description
This is macro GRAY128.
5.2.2.7.26.584 GRAY160 Macro
C
#define GRAY160 GFX_RGBConvert(160, 160, 160)
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Description
This is macro GRAY160.
5.2.2.7.26.585 GRAY192 Macro
C
#define GRAY192 GFX_RGBConvert(192, 192, 192)
Description
This is macro GRAY192.
5.2.2.7.26.586 GRAY204 Macro
C
#define GRAY204 GFX_RGBConvert(204, 204, 204)
Description
This is macro GRAY204.
5.2.2.7.26.587 GRAY224 Macro
C
#define GRAY224 GFX_RGBConvert(224, 224, 224)
Description
This is macro GRAY224.
5.2.2.7.26.588 GRAY229 Macro
C
#define GRAY229 GFX_RGBConvert(229, 229, 229)
Description
This is macro GRAY229.
5.2.2.7.26.589 GRAY242 Macro
C
#define GRAY242 GFX_RGBConvert(242, 242, 242)
Description
This is macro GRAY242.
5.2.2.7.26.590 GREEN Macro
C
#define GREEN GFX_RGBConvert(0, 128, 0)
Description
This is macro GREEN.
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5.2.2.7.26.591 GRID_DISABLED Macro
C
#define GRID_DISABLED 0x0002 // Bit for disabled state
Description
Bit for disabled state
5.2.2.7.26.592 GRID_DRAW_ALL Macro
C
#define GRID_DRAW_ALL 0x4000 // Bit to indicate whole edit box must be redrawn
Description
Bit to indicate whole edit box must be redrawn
5.2.2.7.26.593 GRID_DRAW_ITEMS Macro
C
#define GRID_DRAW_ITEMS 0x1000 // Bit to indicate that at least one item must be redrawn, but
not the entire grid.
Description
Bit to indicate that at least one item must be redrawn, but not the entire grid.
5.2.2.7.26.594 GRID_FOCUSED Macro
C
#define GRID_FOCUSED 0x0001 // Bit for focused state
Description
Bit for focused state
5.2.2.7.26.595 GRID_HEIGHT Macro
C
#define GRID_HEIGHT(r, ch) ((GFX_OBJ_EMBOSS_SIZE * 2) + (r * (ch + 1)) - 1)
Description
This is macro GRID_HEIGHT.
5.2.2.7.26.596 GRID_HIDE Macro
C
#define GRID_HIDE 0x8000 // Bit to remove object from screen
Description
Bit to remove object from screen
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5.2.2.7.26.597 GRID_MAX_COLUMNS Macro
C
#define GRID_MAX_COLUMNS(rw, cw) ((rw - (GFX_OBJ_EMBOSS_SIZE * 2) + 1) / (cw + 1))
Description
This is macro GRID_MAX_COLUMNS.
5.2.2.7.26.598 GRID_MAX_ROWS Macro
C
#define GRID_MAX_ROWS(rh, ch) ((rh - (GFX_OBJ_EMBOSS_SIZE * 2) + 1) / (ch + 1))
Description
This is macro GRID_MAX_ROWS.
5.2.2.7.26.599 GRID_OUT_OF_BOUNDS Macro
C
#define GRID_OUT_OF_BOUNDS 0x0001 // Status of an out of bounds cell GridSetCell() operation.
Description
Status of an out of bounds cell GridSetCell() operation.
5.2.2.7.26.600 GRID_SHOW_BORDER_ONLY Macro
C
#define GRID_SHOW_BORDER_ONLY 0x0010 // Draw only the outside border of the grid.
Description
Draw only the outside border of the grid.
5.2.2.7.26.601 GRID_SHOW_FOCUS Macro
C
#define GRID_SHOW_FOCUS 0x0008 // Highlight the focused cell.
Description
Highlight the focused cell.
5.2.2.7.26.602 GRID_SHOW_LINES Macro
C
#define GRID_SHOW_LINES 0x0004 // Display grid lines
Description
Display grid lines
5.2.2.7.26.603 GRID_SHOW_SEPARATORS_ONLY Macro
C
#define GRID_SHOW_SEPARATORS_ONLY 0x0020 // Draw only the lines between cells (like
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Tic-tac-toe)
Description
Draw only the lines between cells (like Tic-tac-toe)
5.2.2.7.26.604 GRID_SUCCESS Macro
C
#define GRID_SUCCESS 0x0000 // Status of a successful GridSetCell() operation.
Description
Status of a successful GridSetCell() operation.
5.2.2.7.26.605 GRID_TYPE_MASK Macro
C
#define GRID_TYPE_MASK (0x0C)
Description
This is macro GRID_TYPE_MASK.
5.2.2.7.26.606 GRID_WIDTH Macro
C
#define GRID_WIDTH(c, cw) ((GFX_OBJ_EMBOSS_SIZE * 2) + (c * (cw + 1)) - 1)
Description
This is macro GRID_WIDTH.
5.2.2.7.26.607 GridGetFocusX Macro
C
#define GridGetFocusX(pGrid) pGrid->focusX
Description
Macros: GridGetFocusX(pGrid)
This macro returns the x position of the focused cell.
Preconditions
none
Parameters
Parameters Description
pGrid Pointer to the object.
Returns
Returns the x position of the focused cell.
Side Effects
none
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5.2.2.7.26.608 GridGetFocusY Macro
C
#define GridGetFocusY(pGrid) pGrid->focusY
Description
Macros: GridGetFocusY(pGrid)
This macro returns the y position of the focused cell.
Preconditions
none
Parameters
Parameters Description
pGrid Pointer to the object.
Returns
Returns the y position of the focused cell.
Side Effects
none
5.2.2.7.26.609 GRIDITEM_DRAW Macro
C
#define GRIDITEM_DRAW 0x0100 // Draw this cell
Description
Draw this cell
5.2.2.7.26.610 GRIDITEM_IS_BITMAP Macro
C
#define GRIDITEM_IS_BITMAP 0x0008 // The grid item is a bitmap.
Description
The grid item is a bitmap.
5.2.2.7.26.611 GRIDITEM_IS_TEXT Macro
C
#define GRIDITEM_IS_TEXT 0x0000 // The grid item is a text string.
Description
The grid item is a text string.
5.2.2.7.26.612 GRIDITEM_SELECTED Macro
C
#define GRIDITEM_SELECTED 0x0001 // The cell is selected.
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Description
The cell is selected.
5.2.2.7.26.613 GRIDITEM_TEXTBOTTOM Macro
C
#define GRIDITEM_TEXTBOTTOM 0x0040 // Bit to indicate text is top aligned.
Description
Bit to indicate text is top aligned.
5.2.2.7.26.614 GRIDITEM_TEXTLEFT Macro
C
#define GRIDITEM_TEXTLEFT 0x0020 // Text in the cell is left aligned.
Description
Text in the cell is left aligned.
5.2.2.7.26.615 GRIDITEM_TEXTRIGHT Macro
C
#define GRIDITEM_TEXTRIGHT 0x0010 // Text in the cell is right aligned.
Description
Text in the cell is right aligned.
5.2.2.7.26.616 GRIDITEM_TEXTTOP Macro
C
#define GRIDITEM_TEXTTOP 0x0080 // Bit to indicate text is bottom aligned.
Description
Bit to indicate text is bottom aligned.
5.2.2.7.26.617 HIDE_DATA Macro
C
#define HIDE_DATA 0 // Macro used to reset the data series show flag or indicate
that the data series will be not be shown when the chart is drawn.
Description
Macro used to reset the data series show flag or indicate that the data series will be not be shown when the chart is drawn.
5.2.2.7.26.618 ImageAbort Macro
C
#define ImageAbort IMG_blAbortImageDecoding = 1;
Description
This function sets the Image Decoder's Abort flag so that decoding aborts in the next decoding loop.
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Returns
None
Side Effects
None
Example
void callback(void);
void main(void)
{
IMG_FILE pImageFile;
IMG_vInitialize();
ImageLoopCallbackRegister(callback);
pImageFile = IMG_FOPEN("Image.jpg", "r");
if(pImageFile == NULL)
{
<- Error handling ->
}
IMG_bFullScreenDecode(pImageFile, IMG_JPEG, NULL, NULL);
IMG_FCLOSE(pImageFile);
while(1);
}
void callback(void)
{
if(<- check for abort condition ->)
{
ImageAbort();
}
}
5.2.2.7.26.619 ImageFullScreenDecode Macro
C
#define ImageFullScreenDecode(pImageFile, eImgFormat, pFileAPIs, pPixelOutput) \
ImageDecode(pImageFile, eImgFormat, 0, 0, IMG_SCREEN_WIDTH, IMG_SCREEN_HEIGHT,
(IMG_ALIGN_CENTER | IMG_DOWN_SCALE), pFileAPIs, pPixelOutput)
Description
This function decodes and displays the image on the screen in fullscreen mode with center aligned and downscaled if required
Returns
Error code -> 0 means no error
Side Effects
None
Example
void main(void)
{
IMG_FILE pImageFile;
IMG_vInitialize();
pImageFile = IMG_FOPEN("Image.jpg", "r");
if(pImageFile == NULL)
{
<- Error handling ->
}
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IMG_bFullScreenDecode(pImageFile, IMG_JPEG, NULL, NULL);
IMG_FCLOSE(pImageFile);
while(1);
}
5.2.2.7.26.620 IMG_ALIGN_CENTER Macro
C
#define IMG_ALIGN_CENTER 0x0001
Description
Flags
5.2.2.7.26.621 IMG_DECODE_ABORTED Macro
C
#define IMG_DECODE_ABORTED 0xFF
Description
This is macro IMG_DECODE_ABORTED.
5.2.2.7.26.622 IMG_DOWN_SCALE Macro
C
#define IMG_DOWN_SCALE 0x0002
Description
This is macro IMG_DOWN_SCALE.
5.2.2.7.26.623 IMG_FCLOSE Macro
C
#define IMG_FCLOSE FSfclose
Description
This is macro IMG_FCLOSE.
5.2.2.7.26.624 IMG_FEOF Macro
C
#define IMG_FEOF IMG_pFileAPIs->pFeof
Description
This is macro IMG_FEOF.
5.2.2.7.26.625 IMG_FILE Macro
C
#define IMG_FILE void
Description
This is macro IMG_FILE.
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5.2.2.7.26.626 IMG_FOPEN Macro
C
#define IMG_FOPEN FSfopen
Description
added by Paolo 9/10/08 for MultiApp Demo
5.2.2.7.26.627 IMG_FREAD Macro
C
#define IMG_FREAD IMG_pFileAPIs->pFread
Description
This is macro IMG_FREAD.
5.2.2.7.26.628 IMG_FSEEK Macro
C
#define IMG_FSEEK IMG_pFileAPIs->pFseek
Description
This is macro IMG_FSEEK.
5.2.2.7.26.629 IMG_FTELL Macro
C
#define IMG_FTELL IMG_pFileAPIs->pFtell
Description
This is macro IMG_FTELL.
5.2.2.7.26.630 IMG_SCREEN_HEIGHT Macro
C
#define IMG_SCREEN_HEIGHT (GetMaxY()+1)
Description
This is macro IMG_SCREEN_HEIGHT.
5.2.2.7.26.631 IMG_SCREEN_WIDTH Macro
C
#define IMG_SCREEN_WIDTH (GetMaxX()+1)
Description
The individual image decoders use these defines instead of directly using those provided in the Display driver file
5.2.2.7.26.632 IMG_vCheckAndAbort Macro
C
#define IMG_vCheckAndAbort \
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if(IMG_blAbortImageDecoding == 1) \
{ \
IMG_blAbortImageDecoding = 0; \
return IMG_DECODE_ABORTED; \
}
Description
This is macro IMG_vCheckAndAbort.
5.2.2.7.26.633 IMG_vLoopCallback Macro
C
#define IMG_vLoopCallback
Description
This is macro IMG_vLoopCallback.
5.2.2.7.26.634 IMG_vPutPixel Macro
C
#define IMG_vPutPixel(x, y) if(IMG_bDownScalingFactor <= 1)\
{ \
if((x) < IMG_wImageWidth && (y) < IMG_wImageHeight) {
_PutPixel(IMG_wStartX + (x), IMG_wStartY + (y)); }\
} \
else if((x)%IMG_bDownScalingFactor == 0 &&
(y)%IMG_bDownScalingFactor == 0) \
{ \
if((x) < IMG_wImageWidth && (y) < IMG_wImageHeight) {
_PutPixel(IMG_wStartX + ((x)/IMG_bDownScalingFactor), IMG_wStartY +
((y)/IMG_bDownScalingFactor)); }\
}
Description
This is macro IMG_vPutPixel.
5.2.2.7.26.635 IMG_vSetColor Macro
C
#define IMG_vSetColor(handle, r, g, b) GFX_PRIM_SetColor(handle, RGBConvert((r), (g), (b)))
Description
This is macro IMG_vSetColor.
5.2.2.7.26.636 KHAKI Macro
C
#define KHAKI GFX_RGBConvert(240, 230, 140)
Description
This is macro KHAKI.
5.2.2.7.26.637 LIGHTBLUE Macro
C
#define LIGHTBLUE GFX_RGBConvert(128, 128, 255)
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Description
This is macro LIGHTBLUE.
5.2.2.7.26.638 LIGHTCYAN Macro
C
#define LIGHTCYAN GFX_RGBConvert(128, 255, 255)
Description
This is macro LIGHTCYAN.
5.2.2.7.26.639 LIGHTGRAY Macro
C
#define LIGHTGRAY GFX_RGBConvert(128, 128, 128)
Description
This is macro LIGHTGRAY.
5.2.2.7.26.640 LIGHTGREEN Macro
C
#define LIGHTGREEN GFX_RGBConvert(128, 255, 128)
Description
This is macro LIGHTGREEN.
5.2.2.7.26.641 LIGHTMAGENTA Macro
C
#define LIGHTMAGENTA GFX_RGBConvert(255, 128, 255)
Description
This is macro LIGHTMAGENTA.
5.2.2.7.26.642 LIGHTORANGE Macro
C
#define LIGHTORANGE GFX_RGBConvert(255, 200, 0)
Description
This is macro LIGHTORANGE.
5.2.2.7.26.643 LIGHTRED Macro
C
#define LIGHTRED GFX_RGBConvert(255, 128, 128)
Description
This is macro LIGHTRED.
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5.2.2.7.26.644 LIGHTYELLOW Macro
C
#define LIGHTYELLOW GFX_RGBConvert(255, 255, 150)
Description
This is macro LIGHTYELLOW.
5.2.2.7.26.645 MAGENTA Macro
C
#define MAGENTA GFX_RGBConvert(128, 0, 128)
Description
This is macro MAGENTA.
5.2.2.7.26.646 MCHP_BITMAP_NORMAL Macro
C
#define MCHP_BITMAP_NORMAL 0x00 // no compression, palette is present
Description
no compression, palette is present for color depth = 8, 4 and 1 BPP
5.2.2.7.26.647 MCHP_BITMAP_PALETTE_STR Macro
C
#define MCHP_BITMAP_PALETTE_STR 0x10 // palette is provided as a separate
Description
palette is provided as a separate object (see PALETTE_HEADER) for color depth = 8, 4, and 1 BPP, ID to the palette is
embedded in the bitmap.
5.2.2.7.26.648 ONEP25 Macro
C
#define ONEP25 81920 // 1.25 * 2^16
Description
1.25 * 2^16
5.2.2.7.26.649 ORANGE Macro
C
#define ORANGE GFX_RGBConvert(255, 187, 76)
Description
This is macro ORANGE.
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5.2.2.7.26.650 PERU Macro
C
#define PERU GFX_RGBConvert(205, 133, 63)
Description
This is macro PERU.
5.2.2.7.26.651 RED Macro
C
#define RED GFX_RGBConvert(128, 0, 0)
Description
This is macro RED.
5.2.2.7.26.652 RequestEntirePaletteChange Macro
C
#define RequestEntirePaletteChange(pPalette) RequestPaletteChange(pPalette, 0, 256)
Description
Macro: RequestEntirePaletteChange(pPalette)
Loads all the palette entries from the flash during vertical blanking period if possible, otherwise loads immediately.
Preconditions
PPalette must be initialized by PaletteInit().
Parameters
Parameters Description
pPalette Pointer to the palette structure
Returns
none
Side Effects
There may be a slight flicker when the Palette entries are getting loaded one by one.
5.2.2.7.26.653 SADDLEBROWN Macro
C
#define SADDLEBROWN GFX_RGBConvert(139, 69, 19)
Description
This is macro SADDLEBROWN.
5.2.2.7.26.654 SCAN_BS_PRESSED Macro
C
#define SCAN_BS_PRESSED 0x0E
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Description
Back space key pressed.
5.2.2.7.26.655 SCAN_BS_RELEASED Macro
C
#define SCAN_BS_RELEASED 0x8E
Description
Back space key released.
5.2.2.7.26.656 SCAN_CR_PRESSED Macro
C
#define SCAN_CR_PRESSED 0x1C
Description
Carriage return pressed.
5.2.2.7.26.657 SCAN_CR_RELEASED Macro
C
#define SCAN_CR_RELEASED 0x9C
Description
Carriage return released.
5.2.2.7.26.658 SCAN_CRA_PRESSED Macro
C
#define SCAN_CRA_PRESSED 0x2C
Description
Carriage return alternate pressed.
5.2.2.7.26.659 SCAN_CRA_RELEASED Macro
C
#define SCAN_CRA_RELEASED 0xAC
Description
Carriage return alternate released.
5.2.2.7.26.660 SCAN_DEL_PRESSED Macro
C
#define SCAN_DEL_PRESSED 0x53
Description
Delete key pressed.
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5.2.2.7.26.661 SCAN_DEL_RELEASED Macro
C
#define SCAN_DEL_RELEASED 0xD3
Description
Delete key released.
5.2.2.7.26.662 SCAN_DOWN_PRESSED Macro
C
#define SCAN_DOWN_PRESSED 0x50
Description
Down key pressed.
5.2.2.7.26.663 SCAN_DOWN_RELEASED Macro
C
#define SCAN_DOWN_RELEASED 0xD0
Description
Down key released.
5.2.2.7.26.664 SCAN_END_PRESSED Macro
C
#define SCAN_END_PRESSED 0x4F
Description
End key pressed.
5.2.2.7.26.665 SCAN_END_RELEASED Macro
C
#define SCAN_END_RELEASED 0xCF
Description
End key released.
5.2.2.7.26.666 SCAN_HOME_PRESSED Macro
C
#define SCAN_HOME_PRESSED 0x47
Description
Home key pressed.
5.2.2.7.26.667 SCAN_HOME_RELEASED Macro
C
#define SCAN_HOME_RELEASED 0xC7
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Description
Home key released.
5.2.2.7.26.668 SCAN_LEFT_PRESSED Macro
C
#define SCAN_LEFT_PRESSED 0x4B
Description
Left key pressed.
5.2.2.7.26.669 SCAN_LEFT_RELEASED Macro
C
#define SCAN_LEFT_RELEASED 0xCB
Description
Left key released.
5.2.2.7.26.670 SCAN_PGDOWN_PRESSED Macro
C
#define SCAN_PGDOWN_PRESSED 0x51
Description
Page down key pressed.
5.2.2.7.26.671 SCAN_PGDOWN_RELEASED Macro
C
#define SCAN_PGDOWN_RELEASED 0xD1
Description
Page down key released.
5.2.2.7.26.672 SCAN_PGUP_PRESSED Macro
C
#define SCAN_PGUP_PRESSED 0x49
Description
Page up key pressed.
5.2.2.7.26.673 SCAN_PGUP_RELEASED Macro
C
#define SCAN_PGUP_RELEASED 0xC9
Description
Page up key released.
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5.2.2.7.26.674 SCAN_RIGHT_PRESSED Macro
C
#define SCAN_RIGHT_PRESSED 0x4D
Description
Right key pressed.
5.2.2.7.26.675 SCAN_RIGHT_RELEASED Macro
C
#define SCAN_RIGHT_RELEASED 0xCD
Description
Right key released.
5.2.2.7.26.676 SCAN_SPACE_PRESSED Macro
C
#define SCAN_SPACE_PRESSED 0x39
Description
Space key pressed.
5.2.2.7.26.677 SCAN_SPACE_RELEASED Macro
C
#define SCAN_SPACE_RELEASED 0xB9
Description
Space key released.
5.2.2.7.26.678 SCAN_TAB_PRESSED Macro
C
#define SCAN_TAB_PRESSED 0x0F
Description
Tab key pressed.
5.2.2.7.26.679 SCAN_TAB_RELEASED Macro
C
#define SCAN_TAB_RELEASED 0x8F
Description
Tab key released.
5.2.2.7.26.680 SCAN_UP_PRESSED Macro
C
#define SCAN_UP_PRESSED 0x48
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Description
Up key pressed.
5.2.2.7.26.681 SCAN_UP_RELEASED Macro
C
#define SCAN_UP_RELEASED 0xC8
Description
Up key released.
5.2.2.7.26.682 SetEntirePalette Macro
C
#define SetEntirePalette(pPalette) SetPalette(pPalette, 0, 256)
Description
Macro: SetEntirePalette(pPalette)
Programs the whole 256 entry palette with new color values from flash.
Preconditions
Palette must be initialized by PaletteInit().
Parameters
Parameters Description
pPalette Pointer to the palette structure
Returns
Returns the status of the palette set. 0 - Set was successful 1 - Set was not successful
Side Effects
There may be a slight flicker when the Palette entries are getting loaded one by one.
5.2.2.7.26.683 SHOW_DATA Macro
C
#define SHOW_DATA 1 // Macro used to set the data series show flag or indicate
that the data series will be shown when the chart is drawn.
Description
Macro used to set the data series show flag or indicate that the data series will be shown when the chart is drawn.
5.2.2.7.26.684 SIENNA Macro
C
#define SIENNA GFX_RGBConvert(160, 82, 45)
Description
This is macro SIENNA.
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5.2.2.7.26.685 SIN45 Macro
C
#define SIN45 46341 // sin(45) * 2^16)
Description
sin(45) * 2^16)
5.2.2.7.26.686 TAN Macro
C
#define TAN GFX_RGBConvert(210, 180, 140)
Description
This is macro TAN.
5.2.2.7.26.687 TE_ROUNDEDBUTTON_RADIUS Macro
C
#define TE_ROUNDEDBUTTON_RADIUS 0
Description
Optional settigns Set this parameter in the GraphicsConfig.h
5.2.2.7.26.688 USE_HORZ_ASCENDING_ORDER Macro
C
#define USE_HORZ_ASCENDING_ORDER
Description
use ascending order when displaying variables on horizontal mode (bar chart only)
5.2.2.7.26.689 USE_PIE_ENABLE_LABEL Macro
C
#define USE_PIE_ENABLE_LABEL
Description
use labels: A:10%,30 where each sample is labeled A-Z followed by a colon.
5.2.2.7.26.690 WHEAT Macro
C
#define WHEAT GFX_RGBConvert(245, 245, 220)
Description
This is macro WHEAT.
5.2.2.7.26.691 WHITE Macro
C
#define WHITE GFX_RGBConvert(255, 255, 255)
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Description
This is macro WHITE.
5.2.2.7.26.692 YELLOW Macro
C
#define YELLOW GFX_RGBConvert(255, 255, 128)
Description
This is macro YELLOW.
5.2.2.7.26.693 GFX_GOL_EDITBOX_STATE Enumeration
C
typedef enum {
GFX_GOL_EDITBOX_FOCUSED_STATE = 0x0001,
GFX_GOL_EDITBOX_DISABLED_STATE = 0x0002,
GFX_GOL_EDITBOX_ENABLE_CARET_STATE = 0x0004,
GFX_GOL_EDITBOX_DRAW_CARET_STATE = 0x1000,
GFX_GOL_EDITBOX_DRAW_FOCUS_STATE = 0x2000,
GFX_GOL_EDITBOX_DRAW_STATE = 0x4000,
GFX_GOL_EDITBOX_HIDE_STATE = 0x8000
} GFX_GOL_EDITBOX_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_EDITBOX_FOCUSED_STATE =
0x0001
Bit for focus state. Cursor caret will be drawn when
GFX_GOL_EDITBOX_ENABLE_CARET_STATE is also set.
GFX_GOL_EDITBOX_DISABLED_STATE =
0x0002
Bit for disabled state.
GFX_GOL_EDITBOX_ENABLE_CARET_STATE
= 0x0004
Bit to indicate cursor caret will always be shown.
GFX_GOL_EDITBOX_DRAW_CARET_STATE =
0x1000
Bit to indicate the cursor caret will be drawn if
GFX_GOL_EDITBOX_FOCUSED_STATE state bit is set and erase when
GFX_GOL_EDITBOX_FOCUSED_STATE state bit is not set.
GFX_GOL_EDITBOX_DRAW_FOCUS_STATE
= 0x2000
Bit to indicate focus must be redrawn.
GFX_GOL_EDITBOX_DRAW_STATE = 0x4000 Bit to indicate object must be redrawn.
GFX_GOL_EDITBOX_HIDE_STATE = 0x8000 Bit to indicate object must be removed from screen.
5.2.2.7.26.694 GFX_GOL_PICTURECONTROL Structure
C
typedef struct {
GFX_GOL_OBJ_HEADER hdr;
GFX_RESOURCE_HDR * pImage;
int8_t scaleFactor;
uint16_t imageLeft;
uint16_t imageTop;
uint16_t imageRight;
uint32_t * stream;
uint8_t count;
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uint8_t delay;
uint16_t imageBottom;
GFX_PARTIAL_IMAGE_PARAM partial;
} GFX_GOL_PICTURECONTROL;
Description
The structure contains data for picture control
Members
Members Description
GFX_GOL_OBJ_HEADER hdr; Generic header for all Objects (see GFX_GOL_OBJ_HEADER).
GFX_RESOURCE_HDR * pImage; Pointer to the image
int8_t scaleFactor; Scale factor for the bitmap
uint16_t imageLeft; image left position when drawn
uint16_t imageTop; image top position when drawn
uint16_t imageRight; image right position when drawn
uint8_t count; Count for the number of bitmaps to be streamed
uint8_t delay; Delay in between the streaming of bitmaps
uint16_t imageBottom; image bottom position when drawn
GFX_PARTIAL_IMAGE_PARAM partial; structure containing partial image data
5.2.2.7.26.695 GFX_GOL_PICTURECONTROLCONTROL_STATE Enumeration
C
typedef enum {
GFX_GOL_PICTURECONTROL_DISABLED_STATE = 0x0002,
GFX_GOL_PICTURECONTROL_FRAME_STATE = 0x0004,
GFX_GOL_PICTURECONTROL_STREAM_STATE = 0x0008,
GFX_GOL_PICTURECONTROL_DRAW_STATE = 0x4000,
GFX_GOL_PICTURECONTROL_HIDE_STATE = 0x8000
} GFX_GOL_PICTURECONTROLCONTROL_STATE;
Description
Object States Definition:
Members
Members Description
GFX_GOL_PICTURECONTROL_DISABLED_STATE
= 0x0002
Bit for disabled state.
GFX_GOL_PICTURECONTROL_FRAME_STATE =
0x0004
Bit for state with frame.
GFX_GOL_PICTURECONTROL_STREAM_STATE
= 0x0008
Bit to indicate Picture is streaming
GFX_GOL_PICTURECONTROL_DRAW_STATE =
0x4000
Bit to indicate object must be redrawn.
GFX_GOL_PICTURECONTROL_HIDE_STATE =
0x8000
Bit to indicate object must be removed from screen.
5.2.2.7.26.696 GFX_GOL_DigitalMeterTextAlignmentGet Macro
C
#define GFX_GOL_DigitalMeterTextAlignmentGet(pObject) \
(((GFX_GOL_DIGITALMETER *)pObject)->alignment)
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Description
This function returns the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The text alignment set in the object. See GFX_ALIGNMENT for more details.
Example
None.
5.2.2.7.26.697 GFX_GOL_DigitalMeterTextAlignmentSet Macro
C
#define GFX_GOL_DigitalMeterTextAlignmentSet(pObject, align) \
(((GFX_GOL_DIGITALMETER *)pObject)->alignment = align)
Description
This function sets the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
align The alignment set for the text in the object. See GFX_ALIGNMENT for more
details.
Returns
None.
Example
None.
5.2.2.7.26.698 GFX_GOL_EditBoxTextAlignmentGet Macro
C
#define GFX_GOL_EditBoxTextAlignmentGet(pObject) \
(((GFX_GOL_EDITBOX *)pObject)->alignment)
Description
This function returns the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
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Parameters
Parameters Description
pObject pointer to the object.
Returns
The text alignment set in the object. See GFX_ALIGNMENT for more details.
Example
None.
5.2.2.7.26.699 GFX_GOL_EditBoxTextAlignmentSet Macro
C
#define GFX_GOL_EditBoxTextAlignmentSet(pObject, align) \
(((GFX_GOL_EDITBOX *)pObject)->alignment = align)
Description
This function sets the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
align The alignment set for the text in the object. See GFX_ALIGNMENT for more
details.
Returns
None.
Example
None.
5.2.2.7.26.700 GFX_GOL_EditBoxTextGet Macro
C
#define GFX_GOL_EditBoxTextGet(pObject) (((GFX_GOL_EDITBOX *)pObject)->pText)
Description
This function returns the address of the current text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to text string.
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Example
None.
5.2.2.7.26.701 GFX_GOL_ListBoxTextAlignmentGet Macro
C
#define GFX_GOL_ListBoxTextAlignmentGet(pObject) \
(((GFX_GOL_LISTBOX *)pObject)->alignment)
Description
This function returns the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
The text alignment set in the object. See GFX_ALIGNMENT for more details.
Example
None.
5.2.2.7.26.702 GFX_GOL_ListBoxTextAlignmentSet Macro
C
#define GFX_GOL_ListBoxTextAlignmentSet(pObject, align) \
(((GFX_GOL_LISTBOX *)pObject)->alignment = align)
Description
This function sets the text alignment of the text string used by the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject Pointer to the object.
align The alignment set for the text in the object. See GFX_ALIGNMENT for more
details.
Returns
None.
Example
None.
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5.2.2.7.26.703 GFX_GOL_PictureControlImageGet Macro
C
#define GFX_GOL_PictureControlImageGet(pObject) \
(((GFX_GOL_PICTURECONTROL*)pObject)->pImage)
Description
This function gets the image used when in the pressed state.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
Returns
Pointer to the image resource.
Example
None.
5.2.2.7.26.704 GFX_GOL_PictureControlImageSet Macro
C
#define GFX_GOL_PictureControlImageSet(pObject, pImage) \
(((GFX_GOL_PICTURECONTROL*)pObject)->pImage = pImage)
Description
This function sets the image to be in the object.
Preconditions
Object must exist in memory.
Parameters
Parameters Description
pObject pointer to the object.
pImage pointer to the image resource.
Returns
None.
Example
// assume OrigImage and NewImage are valid GFX_RESOURCE_HDR
// pointers for images
GFX_RESOURCE_HDR *pOrigIcon = &OrigImage;
GFX_RESOURCE_HDR *pNewIcon = &NewImage;
GFX_GOL_PICTURECONTROL *pPicture;
pPicture = GFX_GOL_PictureControlCreate(
10,
0, 0,
GFX_MaxXGet(), GFX_MaxYGet(),
GFX_GOL_PICTURECONTROL_DRAW_STATE,
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pOrigIcon,
NULL);
// change the image used
GFX_GOL_PictureControlImageSet(pPicture , pNewIcon);
5.2.2.7.26.705 GFX_GOL_PictureControlScaleSet Macro
C
#define GFX_GOL_PictureControlScaleSet(pPict, scl) pPict->scaleFactor = scl
Description
This function sets the scale factor used to render the bitmap used in the object using scl.
Preconditions
None.
Parameters
Parameters Description
pPict Pointer to the object
scl The scale factor that will be used to display the bitmap.
Returns
None.
Remarks
None.
Example
None.
5.2.2.8 Files
Files
Name Description
gfx.h The header file joins all header files used in the graphics library and contains
compile options and defaults.
gfx_colors.h The header file contains default color definitions for each color depth.
gfx_colors_w3.h The header file contains W3 color definitions.
gfx_colors_x11.h The header file contains X11 color definitions.
5.2.2.8.1 gfx.h
Module for Microchip Graphics Library
This header file includes all the header files required to use the Microchip Graphics Library. Library features and options defined
in the Graphics Library configurations will be included in each build.
Macros
Name Description
GRAPHICS_LIBRARY_VERSION //////////////////// GRAPHICS_LIBRARY_VERSION ///////////////////// MSB is version,
LSB is subversion
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File Name
gfx.h
Company
Microchip Technology Inc.
5.2.2.8.2 gfx_colors.h
Module for Microchip Graphics Library
This header file provides default color definitions as well as color conversion macros. Application may or may not use this file.
Application may replace this file with new color definitions that fits the application needs.
Macros
Name Description
BLACK This is macro BLACK.
BLUE This is macro BLUE.
BRIGHTBLUE This is macro BRIGHTBLUE.
BRIGHTCYAN This is macro BRIGHTCYAN.
BRIGHTGREEN This is macro BRIGHTGREEN.
BRIGHTMAGENTA This is macro BRIGHTMAGENTA.
BRIGHTRED This is macro BRIGHTRED.
BRIGHTYELLOW This is macro BRIGHTYELLOW.
BROWN This is macro BROWN.
BURLYWOOD This is macro BURLYWOOD.
CYAN This is macro CYAN.
DARKGRAY This is macro DARKGRAY.
DARKORANGE This is macro DARKORANGE.
GOLD This is macro GOLD.
GRAY000 This is macro GRAY000.
GRAY001 This is macro GRAY001.
GRAY002 This is macro GRAY002.
GRAY003 This is macro GRAY003.
GRAY004 This is macro GRAY004.
GRAY005 This is macro GRAY005.
GRAY006 This is macro GRAY006.
GRAY007 This is macro GRAY007.
GRAY008 This is macro GRAY008.
GRAY009 This is macro GRAY009.
GRAY010 This is macro GRAY010.
GRAY011 This is macro GRAY011.
GRAY012 This is macro GRAY012.
GRAY013 This is macro GRAY013.
GRAY014 This is macro GRAY014.
GRAY015 This is macro GRAY015.
GRAY032 This is macro GRAY032.
GRAY096 This is macro GRAY096.
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GRAY128 This is macro GRAY128.
GRAY160 This is macro GRAY160.
GRAY192 This is macro GRAY192.
GRAY204 This is macro GRAY204.
GRAY224 This is macro GRAY224.
GRAY229 This is macro GRAY229.
GRAY242 This is macro GRAY242.
GREEN This is macro GREEN.
LIGHTBLUE This is macro LIGHTBLUE.
LIGHTCYAN This is macro LIGHTCYAN.
LIGHTGRAY This is macro LIGHTGRAY.
LIGHTGREEN This is macro LIGHTGREEN.
LIGHTMAGENTA This is macro LIGHTMAGENTA.
LIGHTORANGE This is macro LIGHTORANGE.
LIGHTRED This is macro LIGHTRED.
LIGHTYELLOW This is macro LIGHTYELLOW.
MAGENTA This is macro MAGENTA.
ORANGE This is macro ORANGE.
PERU This is macro PERU.
RED This is macro RED.
SADDLEBROWN This is macro SADDLEBROWN.
SIENNA This is macro SIENNA.
TAN This is macro TAN.
WHEAT This is macro WHEAT.
WHITE This is macro WHITE.
YELLOW This is macro YELLOW.
File Name
gfx_colors.h
Company
Microchip Technology Inc.
5.2.2.8.3 gfx_colors_w3.h
Module for Microchip Graphics Library
This header file provides W3 color definitions as an option of color definitions to use.
Remarks
http://www.w3.org/TR/SVG/types.html#ColorKeywords
Macros
Name Description
GFX_W3_ALICEBLUE This is macro GFX_W3_ALICEBLUE.
GFX_W3_ANTIQUEWHITE This is macro GFX_W3_ANTIQUEWHITE.
GFX_W3_AQUA This is macro GFX_W3_AQUA.
GFX_W3_AQUAMARINE This is macro GFX_W3_AQUAMARINE.
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GFX_W3_AZURE This is macro GFX_W3_AZURE.
GFX_W3_BEIGE This is macro GFX_W3_BEIGE.
GFX_W3_BISQUE This is macro GFX_W3_BISQUE.
GFX_W3_BLACK This is macro GFX_W3_BLACK.
GFX_W3_BLANCHEDALMOND This is macro GFX_W3_BLANCHEDALMOND.
GFX_W3_BLUE This is macro GFX_W3_BLUE.
GFX_W3_BLUEVIOLET This is macro GFX_W3_BLUEVIOLET.
GFX_W3_BROWN This is macro GFX_W3_BROWN.
GFX_W3_BURLYWOOD This is macro GFX_W3_BURLYWOOD.
GFX_W3_CADETBLUE This is macro GFX_W3_CADETBLUE.
GFX_W3_CHARTREUSE This is macro GFX_W3_CHARTREUSE.
GFX_W3_CHOCOLATE This is macro GFX_W3_CHOCOLATE.
GFX_W3_CORAL This is macro GFX_W3_CORAL.
GFX_W3_CORNFLOWERBLUE This is macro GFX_W3_CORNFLOWERBLUE.
GFX_W3_CORNSILK This is macro GFX_W3_CORNSILK.
GFX_W3_CRIMSON This is macro GFX_W3_CRIMSON.
GFX_W3_CYAN This is macro GFX_W3_CYAN.
GFX_W3_DARKBLUE This is macro GFX_W3_DARKBLUE.
GFX_W3_DARKCYAN This is macro GFX_W3_DARKCYAN.
GFX_W3_darkgoldenrod This is macro GFX_W3_darkgoldenrod.
GFX_W3_DARKGRAY This is macro GFX_W3_DARKGRAY.
GFX_W3_DARKGREEN This is macro GFX_W3_DARKGREEN.
GFX_W3_DARKGREY This is macro GFX_W3_DARKGREY.
GFX_W3_DARKHAKI This is macro GFX_W3_DARKHAKI.
GFX_W3_DARKMAGENTA This is macro GFX_W3_DARKMAGENTA.
GFX_W3_DARKOLIVEGREEN This is macro GFX_W3_DARKOLIVEGREEN.
GFX_W3_DARKORANGE This is macro GFX_W3_DARKORANGE.
GFX_W3_DARKORCHID This is macro GFX_W3_DARKORCHID.
GFX_W3_DARKRED This is macro GFX_W3_DARKRED.
GFX_W3_DARKSALMON This is macro GFX_W3_DARKSALMON.
GFX_W3_DARKSEAGREEN This is macro GFX_W3_DARKSEAGREEN.
GFX_W3_DARKSLATEBLUE This is macro GFX_W3_DARKSLATEBLUE.
GFX_W3_DARKSLATEGRAY This is macro GFX_W3_DARKSLATEGRAY.
GFX_W3_DARKSLATEGREY This is macro GFX_W3_DARKSLATEGREY.
GFX_W3_DARKTURQUOISE This is macro GFX_W3_DARKTURQUOISE.
GFX_W3_DARKVIOLET This is macro GFX_W3_DARKVIOLET.
GFX_W3_DEEPPINK This is macro GFX_W3_DEEPPINK.
GFX_W3_DEEPSKYBLUE This is macro GFX_W3_DEEPSKYBLUE.
GFX_W3_DIMGRAY This is macro GFX_W3_DIMGRAY.
GFX_W3_DIMGREY This is macro GFX_W3_DIMGREY.
GFX_W3_DODGERBLUE This is macro GFX_W3_DODGERBLUE.
GFX_W3_FIREBRICK This is macro GFX_W3_FIREBRICK.
GFX_W3_FLORALWHITE This is macro GFX_W3_FLORALWHITE.
GFX_W3_FORESTGREEN This is macro GFX_W3_FORESTGREEN.
GFX_W3_FUCHSIA This is macro GFX_W3_FUCHSIA.
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GFX_W3_GAINSBORO This is macro GFX_W3_GAINSBORO.
GFX_W3_GHOSTWHITE This is macro GFX_W3_GHOSTWHITE.
GFX_W3_GOLD This is macro GFX_W3_GOLD.
GFX_W3_GOLDENROD This is macro GFX_W3_GOLDENROD.
GFX_W3_GRAY This is macro GFX_W3_GRAY.
GFX_W3_GREEN This is macro GFX_W3_GREEN.
GFX_W3_GREENYELLOW This is macro GFX_W3_GREENYELLOW.
GFX_W3_GREY This is macro GFX_W3_GREY.
GFX_W3_HONEYDEW This is macro GFX_W3_HONEYDEW.
GFX_W3_HOTPINK This is macro GFX_W3_HOTPINK.
GFX_W3_INDIANRED This is macro GFX_W3_INDIANRED.
GFX_W3_INDIGO This is macro GFX_W3_INDIGO.
GFX_W3_IVORY This is macro GFX_W3_IVORY.
GFX_W3_LAVENDER This is macro GFX_W3_LAVENDER.
GFX_W3_LAVENDERBLUSH This is macro GFX_W3_LAVENDERBLUSH.
GFX_W3_LAWNGREEN This is macro GFX_W3_LAWNGREEN.
GFX_W3_LEMONCHIFFON This is macro GFX_W3_LEMONCHIFFON.
GFX_W3_LIGHTBLUE This is macro GFX_W3_LIGHTBLUE.
GFX_W3_LIGHTCORAL This is macro GFX_W3_LIGHTCORAL.
GFX_W3_LIGHTCYAN This is macro GFX_W3_LIGHTCYAN.
GFX_W3_LIGHTGOLDENRODYELLOW This is macro GFX_W3_LIGHTGOLDENRODYELLOW.
GFX_W3_LIGHTGRAY This is macro GFX_W3_LIGHTGRAY.
GFX_W3_LIGHTGREEN This is macro GFX_W3_LIGHTGREEN.
GFX_W3_LIGHTGREY This is macro GFX_W3_LIGHTGREY.
GFX_W3_LIGHTPINK This is macro GFX_W3_LIGHTPINK.
GFX_W3_LIGHTSALMON This is macro GFX_W3_LIGHTSALMON.
GFX_W3_LIGHTSKYBLUE This is macro GFX_W3_LIGHTSKYBLUE.
GFX_W3_LIGHTSLATEGRAY This is macro GFX_W3_LIGHTSLATEGRAY.
GFX_W3_LIGHTSLATEGREY This is macro GFX_W3_LIGHTSLATEGREY.
GFX_W3_LIGHTSTEELBLUE This is macro GFX_W3_LIGHTSTEELBLUE.
GFX_W3_LIGHTYELLOW This is macro GFX_W3_LIGHTYELLOW.
GFX_W3_LIGTHSEAGREEN This is macro GFX_W3_LIGTHSEAGREEN.
GFX_W3_LIME This is macro GFX_W3_LIME.
GFX_W3_LIMEGREEN This is macro GFX_W3_LIMEGREEN.
GFX_W3_LINEN This is macro GFX_W3_LINEN.
GFX_W3_MAGENTA This is macro GFX_W3_MAGENTA.
GFX_W3_MAROON This is macro GFX_W3_MAROON.
GFX_W3_MEDIUMAQUAMARINE This is macro GFX_W3_MEDIUMAQUAMARINE.
GFX_W3_MEDIUMBLUE This is macro GFX_W3_MEDIUMBLUE.
GFX_W3_MEDIUMORCHID This is macro GFX_W3_MEDIUMORCHID.
GFX_W3_MEDIUMPURPLE This is macro GFX_W3_MEDIUMPURPLE.
GFX_W3_MEDIUMSEAGREEN This is macro GFX_W3_MEDIUMSEAGREEN.
GFX_W3_MEDIUMSLATEBLUE This is macro GFX_W3_MEDIUMSLATEBLUE.
GFX_W3_MEDIUMSPRINGGREEN This is macro GFX_W3_MEDIUMSPRINGGREEN.
GFX_W3_MEDIUMTURQUOISE This is macro GFX_W3_MEDIUMTURQUOISE.
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GFX_W3_MEDIUMVIOLETRED This is macro GFX_W3_MEDIUMVIOLETRED.
GFX_W3_MIDNIGHTBLUE This is macro GFX_W3_MIDNIGHTBLUE.
GFX_W3_MINTCREAM This is macro GFX_W3_MINTCREAM.
GFX_W3_MISTYROSE This is macro GFX_W3_MISTYROSE.
GFX_W3_MOCCASIN This is macro GFX_W3_MOCCASIN.
GFX_W3_NAVAJOWHITE This is macro GFX_W3_NAVAJOWHITE.
GFX_W3_NAVY This is macro GFX_W3_NAVY.
GFX_W3_OLDLACE This is macro GFX_W3_OLDLACE.
GFX_W3_OLIVE This is macro GFX_W3_OLIVE.
GFX_W3_OLIVEDRAB This is macro GFX_W3_OLIVEDRAB.
GFX_W3_ORANGE This is macro GFX_W3_ORANGE.
GFX_W3_ORANGERED This is macro GFX_W3_ORANGERED.
GFX_W3_ORCHID This is macro GFX_W3_ORCHID.
GFX_W3_PALEGOLDENROD This is macro GFX_W3_PALEGOLDENROD.
GFX_W3_PALEGREEN This is macro GFX_W3_PALEGREEN.
GFX_W3_PALETURQUOISE This is macro GFX_W3_PALETURQUOISE.
GFX_W3_PALEVIOLETRED This is macro GFX_W3_PALEVIOLETRED.
GFX_W3_PAPAYAWHIP This is macro GFX_W3_PAPAYAWHIP.
GFX_W3_PEACHPUFF This is macro GFX_W3_PEACHPUFF.
GFX_W3_PERU This is macro GFX_W3_PERU.
GFX_W3_PINK This is macro GFX_W3_PINK.
GFX_W3_PLUM This is macro GFX_W3_PLUM.
GFX_W3_POWDERBLUE This is macro GFX_W3_POWDERBLUE.
GFX_W3_PURPLE This is macro GFX_W3_PURPLE.
GFX_W3_RED This is macro GFX_W3_RED.
GFX_W3_ROSYBROWN This is macro GFX_W3_ROSYBROWN.
GFX_W3_ROYALBLUE This is macro GFX_W3_ROYALBLUE.
GFX_W3_SADDLEBROWN This is macro GFX_W3_SADDLEBROWN.
GFX_W3_SALMON This is macro GFX_W3_SALMON.
GFX_W3_SANDYGREEN This is macro GFX_W3_SANDYGREEN.
GFX_W3_SEAGREEN This is macro GFX_W3_SEAGREEN.
GFX_W3_SEASHELL This is macro GFX_W3_SEASHELL.
GFX_W3_SIENNA This is macro GFX_W3_SIENNA.
GFX_W3_SILVER This is macro GFX_W3_SILVER.
GFX_W3_SKYBLUE This is macro GFX_W3_SKYBLUE.
GFX_W3_SLATEBLUE This is macro GFX_W3_SLATEBLUE.
GFX_W3_SLATEGRAY This is macro GFX_W3_SLATEGRAY.
GFX_W3_SLATEGREY This is macro GFX_W3_SLATEGREY.
GFX_W3_SNOW This is macro GFX_W3_SNOW.
GFX_W3_SPRINGGREEN This is macro GFX_W3_SPRINGGREEN.
GFX_W3_STEELBLUE This is macro GFX_W3_STEELBLUE.
GFX_W3_TAN This is macro GFX_W3_TAN.
GFX_W3_TEAL This is macro GFX_W3_TEAL.
GFX_W3_THISTLE This is macro GFX_W3_THISTLE.
GFX_W3_TOMATO This is macro GFX_W3_TOMATO.
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GFX_W3_TURQUOISE This is macro GFX_W3_TURQUOISE.
GFX_W3_VIOLET This is macro GFX_W3_VIOLET.
GFX_W3_WHEAT This is macro GFX_W3_WHEAT.
GFX_W3_WHITE This is macro GFX_W3_WHITE.
GFX_W3_WHITESMOKE This is macro GFX_W3_WHITESMOKE.
GFX_W3_YELLOW This is macro GFX_W3_YELLOW.
GFX_W3_YELLOWGREEN This is macro GFX_W3_YELLOWGREEN.
KHAKI This is macro KHAKI.
File Name
gfx_colors_w3.h
Company
Microchip Technology Inc.
5.2.2.8.4 gfx_colors_x11.h
Module for Microchip Graphics Library
This header file provides X11 color definitions as an option of color definitions to use.
Macros
Name Description
GFX_X11_ALICE_BLUE This is macro GFX_X11_ALICE_BLUE.
GFX_X11_ANTIQUE_WHITE This is macro GFX_X11_ANTIQUE_WHITE.
GFX_X11_AQUA This is macro GFX_X11_AQUA.
GFX_X11_AQUAMARINE This is macro GFX_X11_AQUAMARINE.
GFX_X11_AZURE This is macro GFX_X11_AZURE.
GFX_X11_BEIGE This is macro GFX_X11_BEIGE.
GFX_X11_BISQUE This is macro GFX_X11_BISQUE.
GFX_X11_BLACK This is macro GFX_X11_BLACK.
GFX_X11_BLANCHED_ALMOND This is macro GFX_X11_BLANCHED_ALMOND.
GFX_X11_BLUE This is macro GFX_X11_BLUE.
GFX_X11_BLUE_VIOLET This is macro GFX_X11_BLUE_VIOLET.
GFX_X11_BROWN This is macro GFX_X11_BROWN.
GFX_X11_BURLY_WOOD This is macro GFX_X11_BURLY_WOOD.
GFX_X11_CADEL_BLUE This is macro GFX_X11_CADEL_BLUE.
GFX_X11_CHARTEUSE This is macro GFX_X11_CHARTEUSE.
GFX_X11_CHOCOLATE This is macro GFX_X11_CHOCOLATE.
GFX_X11_CORAL This is macro GFX_X11_CORAL.
GFX_X11_CORNFLOWER_BLUE This is macro GFX_X11_CORNFLOWER_BLUE.
GFX_X11_CORNSILK X11: Brown Colors
GFX_X11_CRIMSON This is macro GFX_X11_CRIMSON.
GFX_X11_CYAN This is macro GFX_X11_CYAN.
GFX_X11_DARK_BLUE This is macro GFX_X11_DARK_BLUE.
GFX_X11_DARK_CYAN This is macro GFX_X11_DARK_CYAN.
GFX_X11_DARK_GOLDENROD This is macro GFX_X11_DARK_GOLDENROD.
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GFX_X11_DARK_GREEN This is macro GFX_X11_DARK_GREEN.
GFX_X11_DARK_GREY This is macro GFX_X11_DARK_GREY.
GFX_X11_DARK_KHAKI This is macro GFX_X11_DARK_KHAKI.
GFX_X11_DARK_MAGENTA This is macro GFX_X11_DARK_MAGENTA.
GFX_X11_DARK_OLIVE_GREEN X11: Green Colors
GFX_X11_DARK_ORANGE This is macro GFX_X11_DARK_ORANGE.
GFX_X11_DARK_ORCHID This is macro GFX_X11_DARK_ORCHID.
GFX_X11_DARK_RED This is macro GFX_X11_DARK_RED.
GFX_X11_DARK_SALMON This is macro GFX_X11_DARK_SALMON.
GFX_X11_DARK_SEA_GREEN This is macro GFX_X11_DARK_SEA_GREEN.
GFX_X11_DARK_SLATE_BLUE This is macro GFX_X11_DARK_SLATE_BLUE.
GFX_X11_DARK_SLATE_GREY This is macro GFX_X11_DARK_SLATE_GREY.
GFX_X11_DARK_TURQUOISE This is macro GFX_X11_DARK_TURQUOISE.
GFX_X11_DARK_VIOLET This is macro GFX_X11_DARK_VIOLET.
GFX_X11_DEEP_PINK This is macro GFX_X11_DEEP_PINK.
GFX_X11_DEEP_SKY_BLUE This is macro GFX_X11_DEEP_SKY_BLUE.
GFX_X11_DIM_GREY This is macro GFX_X11_DIM_GREY.
GFX_X11_DODGER_BLUE This is macro GFX_X11_DODGER_BLUE.
GFX_X11_FIRE_BRICK This is macro GFX_X11_FIRE_BRICK.
GFX_X11_FLORAL_WHITE This is macro GFX_X11_FLORAL_WHITE.
GFX_X11_FOREST_GREEN This is macro GFX_X11_FOREST_GREEN.
GFX_X11_FUCHSIA This is macro GFX_X11_FUCHSIA.
GFX_X11_GAINSBORO This is macro GFX_X11_GAINSBORO.
GFX_X11_GHOST_WHITE This is macro GFX_X11_GHOST_WHITE.
GFX_X11_GOLD This is macro GFX_X11_GOLD.
GFX_X11_GOLDENROD This is macro GFX_X11_GOLDENROD.
GFX_X11_GREEN This is macro GFX_X11_GREEN.
GFX_X11_GREEN_YELLOW This is macro GFX_X11_GREEN_YELLOW.
GFX_X11_GREY This is macro GFX_X11_GREY.
GFX_X11_HONEYDEW This is macro GFX_X11_HONEYDEW.
GFX_X11_HOT_PINK This is macro GFX_X11_HOT_PINK.
GFX_X11_INDIAN_RED This is macro GFX_X11_INDIAN_RED.
GFX_X11_INDIGO This is macro GFX_X11_INDIGO.
GFX_X11_IVORY This is macro GFX_X11_IVORY.
GFX_X11_KHAKI This is macro GFX_X11_KHAKI.
GFX_X11_LAVENDER X11: BLUE COLORS
GFX_X11_LAVENDOR_BLUSH This is macro GFX_X11_LAVENDOR_BLUSH.
GFX_X11_LAWN_GREEN This is macro GFX_X11_LAWN_GREEN.
GFX_X11_LEMON_CHIFFON This is macro GFX_X11_LEMON_CHIFFON.
GFX_X11_LIGHT_BLUE This is macro GFX_X11_LIGHT_BLUE.
GFX_X11_LIGHT_CAROL This is macro GFX_X11_LIGHT_CAROL.
GFX_X11_LIGHT_CYAN This is macro GFX_X11_LIGHT_CYAN.
GFX_X11_LIGHT_GOLDENROD_YELLOW This is macro GFX_X11_LIGHT_GOLDENROD_YELLOW.
GFX_X11_LIGHT_GRAY This is macro GFX_X11_LIGHT_GRAY.
GFX_X11_LIGHT_GREEN This is macro GFX_X11_LIGHT_GREEN.
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GFX_X11_LIGHT_PINK This is macro GFX_X11_LIGHT_PINK.
GFX_X11_LIGHT_SALMON X11: Red Colors
GFX_X11_LIGHT_SEA_GREEN This is macro GFX_X11_LIGHT_SEA_GREEN.
GFX_X11_LIGHT_SKY_BLUE This is macro GFX_X11_LIGHT_SKY_BLUE.
GFX_X11_LIGHT_SLATE_GREY This is macro GFX_X11_LIGHT_SLATE_GREY.
GFX_X11_LIGHT_STEEL_BLUE X11: BLUE COLORS
GFX_X11_LIGHT_YELLOW This is macro GFX_X11_LIGHT_YELLOW.
GFX_X11_LIME This is macro GFX_X11_LIME.
GFX_X11_LIME_GREEN This is macro GFX_X11_LIME_GREEN.
GFX_X11_LINEN This is macro GFX_X11_LINEN.
GFX_X11_MAGENTA This is macro GFX_X11_MAGENTA.
GFX_X11_MARRON This is macro GFX_X11_MARRON.
GFX_X11_MEDIUM_AQUAMARINE X11: CYAN COLORS
GFX_X11_MEDIUM_BLUE This is macro GFX_X11_MEDIUM_BLUE.
GFX_X11_MEDIUM_ORCHID This is macro GFX_X11_MEDIUM_ORCHID.
GFX_X11_MEDIUM_PURPLE This is macro GFX_X11_MEDIUM_PURPLE.
GFX_X11_MEDIUM_SEA_GREEN This is macro GFX_X11_MEDIUM_SEA_GREEN.
GFX_X11_MEDIUM_SLATE_BLUE This is macro GFX_X11_MEDIUM_SLATE_BLUE.
GFX_X11_MEDIUM_SPRING_GREEN This is macro GFX_X11_MEDIUM_SPRING_GREEN.
GFX_X11_MEDIUM_TURQUOISE This is macro GFX_X11_MEDIUM_TURQUOISE.
GFX_X11_MEDIUM_VIOLET_RED This is macro GFX_X11_MEDIUM_VIOLET_RED.
GFX_X11_MIDNIGHT_BLUE This is macro GFX_X11_MIDNIGHT_BLUE.
GFX_X11_MINT_CREAM This is macro GFX_X11_MINT_CREAM.
GFX_X11_MISTY_ROSE This is macro GFX_X11_MISTY_ROSE.
GFX_X11_MOCCASIN This is macro GFX_X11_MOCCASIN.
GFX_X11_NAVAJO_WHITE This is macro GFX_X11_NAVAJO_WHITE.
GFX_X11_NAVY This is macro GFX_X11_NAVY.
GFX_X11_OLD_LACE This is macro GFX_X11_OLD_LACE.
GFX_X11_OLIVE This is macro GFX_X11_OLIVE.
GFX_X11_OLIVE_DRAB This is macro GFX_X11_OLIVE_DRAB.
GFX_X11_ORANGE This is macro GFX_X11_ORANGE.
GFX_X11_ORANGE_RED X11: Orange Colors
GFX_X11_ORCHID This is macro GFX_X11_ORCHID.
GFX_X11_PALE_GOLDENROD This is macro GFX_X11_PALE_GOLDENROD.
GFX_X11_PALE_GREEN This is macro GFX_X11_PALE_GREEN.
GFX_X11_PALE_TURQUOISE This is macro GFX_X11_PALE_TURQUOISE.
GFX_X11_PALE_VIOLET_RED This is macro GFX_X11_PALE_VIOLET_RED.
GFX_X11_PAPAYA_WHIP This is macro GFX_X11_PAPAYA_WHIP.
GFX_X11_PEACH_PUFF This is macro GFX_X11_PEACH_PUFF.
GFX_X11_PERU This is macro GFX_X11_PERU.
GFX_X11_PINK X11: Pink Colors
GFX_X11_PLUM This is macro GFX_X11_PLUM.
GFX_X11_POWDER_BLUE This is macro GFX_X11_POWDER_BLUE.
GFX_X11_PURPLE This is macro GFX_X11_PURPLE.
GFX_X11_RED This is macro GFX_X11_RED.
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GFX_X11_ROSY_BROWN This is macro GFX_X11_ROSY_BROWN.
GFX_X11_ROYAL_BLUE This is macro GFX_X11_ROYAL_BLUE.
GFX_X11_SADDLE_BROWN This is macro GFX_X11_SADDLE_BROWN.
GFX_X11_SALMON This is macro GFX_X11_SALMON.
GFX_X11_SANDY_BROWN This is macro GFX_X11_SANDY_BROWN.
GFX_X11_SEA_GREEN This is macro GFX_X11_SEA_GREEN.
GFX_X11_SEASHELL This is macro GFX_X11_SEASHELL.
GFX_X11_SIENNA This is macro GFX_X11_SIENNA.
GFX_X11_SILVER This is macro GFX_X11_SILVER.
GFX_X11_SKY_BLUE This is macro GFX_X11_SKY_BLUE.
GFX_X11_SLATE_BLUE This is macro GFX_X11_SLATE_BLUE.
GFX_X11_SLATE_GREY This is macro GFX_X11_SLATE_GREY.
GFX_X11_SNOW This is macro GFX_X11_SNOW.
GFX_X11_SPRING_GREEN This is macro GFX_X11_SPRING_GREEN.
GFX_X11_STEEL_BLUE This is macro GFX_X11_STEEL_BLUE.
GFX_X11_TAN This is macro GFX_X11_TAN.
GFX_X11_TEAL This is macro GFX_X11_TEAL.
GFX_X11_THISTLE This is macro GFX_X11_THISTLE.
GFX_X11_TOMATO This is macro GFX_X11_TOMATO.
GFX_X11_TURQUOISE This is macro GFX_X11_TURQUOISE.
GFX_X11_VIOLET This is macro GFX_X11_VIOLET.
GFX_X11_WHEAT This is macro GFX_X11_WHEAT.
GFX_X11_WHITE X11: WHITE/GRAY/BLACK COLORS
GFX_X11_WHITE_SMOKE This is macro GFX_X11_WHITE_SMOKE.
GFX_X11_YELLOW X11: Yellow Colors
GFX_X11_YELLOW_GREEN This is macro GFX_X11_YELLOW_GREEN.
File Name
gfx_colors_x11.h
Company
Microchip Technology Inc.
5.2.2.8.5 gfx_config_template.h
• Module for Microchip Graphics Library
• This file contains compile time options for the Graphics Library.
*******************************************************************
• FileName: GraphicsConfig.h
• Dependencies: none
• Processor: PIC24F, PIC24H, dsPIC, PIC32
• Compiler: C30 V3.00/C32
• Company: Microchip Technology, Inc.
*
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• Software License Agreement
*
• Copyright © 2008 Microchip Technology Inc. All rights reserved.
• Microchip licenses to you the right to use, modify, copy and distribute
• Software only when embedded on a Microchip microcontroller or digital
• signal controller, which is integrated into your product or third party
• product (pursuant to the sublicense terms in the accompanying license
• agreement).
*
• You should refer to the license agreement accompanying this Software
• for additional information regarding your rights and obligations.
*
• SOFTWARE AND DOCUMENTATION ARE PROVIDED ?AS IS? WITHOUT WARRANTY OF ANY
• KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY
• OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
• PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
• OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION,
• BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
• DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL,
• INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
• COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY
• CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
• OR OTHER SIMILAR COSTS.
*
• Author Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
• Anton Alkhimenok 10/28/2007 Initial Version
• Pradeep Budagutta 10/28/2007 Display related defines
• moved to DisplayConfig.h
Macros
Name Description
COLOR_DEPTH Specifies the color depth used in the application defined in GraphicsConfig.h.
5.2.2.8.6 gfx_gol.h
Module for Microchip Graphics Library - Graphic Object Layer
This module implements the common routines for the Graphics Object Layer of the Microchip Graphics Library. The routines are
independent of the Display Driver Layer and should be compatible with any Display Driver that is compliant with the
requirements of the Display Driver Layer of the Graphics Library. The module utilizes the Graphics Primitive Layer to render the
objects.
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Enumerations
Name Description
GFX_GOL_OBJ_TYPE Specifies the different object types used in the library.
GFX_GOL_TRANSLATED_ACTION Specifies the different object actions supported in the library.
INPUT_DEVICE_EVENT Specifies the different user input device events supported in the library.
INPUT_DEVICE_TYPE Specifies the different user input devices supported in the library.
Functions
Name Description
GFX_GOL_DrawCallbackSet This function sets the draw callback function that the application will use
to render application specific rendering.
GFX_GOL_MessageCallbackSet This function sets the message callback function that the application will
use to evaluate user inputs that affects the objects and application
behavior.
GFX_GOL_ObjectAdd This function adds an object to the tail of the currently active list.
GFX_GOL_ObjectBackGroundSet This function sets the background information.
GFX_GOL_ObjectByIDDelete This function removes an object with the given user defined ID from the
currently active list.
GFX_GOL_ObjectCanBeFocused Checks if the object can be focused.
GFX_GOL_ObjectDelete This function removes an object from the currently active list.
GFX_GOL_ObjectDrawDisable This function resets the drawing state bits of the object.
GFX_GOL_ObjectDrawEnable This function sets the object to be redraw.
GFX_GOL_ObjectFind This function returns the pointer to object in the list with the user defined
ID assigned to it.
GFX_GOL_ObjectFocusGet This function returns the pointer to the object that is currently receiving
keyboard input (or focused).
GFX_GOL_ObjectFocusNextGet This function returns the pointer to the next object in the active list of
objects which can be focused.
GFX_GOL_ObjectFocusPrevGet This function returns the pointer to the previous object in the active list of
objects which can be focused.
GFX_GOL_ObjectFocusSet This function sets the object to be focused.
GFX_GOL_ObjectHideDraw This is function GFX_GOL_ObjectHideDraw.
GFX_GOL_ObjectIDGet This function returns the object ID.
GFX_GOL_ObjectIsRedrawSet This function checks if the object needs to be redrawn or not.
GFX_GOL_ObjectListDraw This function redraws all objects in the current active list that has the
rendering state bits set.
GFX_GOL_ObjectListFree This function sets the active list to the new list.
GFX_GOL_ObjectListGet This function returns the current active list.
GFX_GOL_ObjectListNew This function removes an object with the given user defined ID from the
currently active list.
GFX_GOL_ObjectListSet This function sets the active list to the new list.
GFX_GOL_ObjectMessage This function process the received message from the user to determine
the affected objects. Depending on the message and the affected
objects, object states are modified based on the default behaviour or user
defined behaviour.
GFX_GOL_ObjectNextGet This function returns the pointer to next object in the list after the
specified object.
GFX_GOL_ObjectRectangleRedraw This function marks all objects in the active list intersected by the given
rectangular area to be redrawn.
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GFX_GOL_ObjectTypeGet This function returns the object type.
GFX_GOL_PanelAlphaParameterSet This is function GFX_GOL_PanelAlphaParameterSet.
GFX_GOL_PanelBackgroundSet This is function GFX_GOL_PanelBackgroundSet.
GFX_GOL_PanelDraw This is function GFX_GOL_PanelDraw.
GFX_GOL_PanelGradientParameterSet This is function GFX_GOL_PanelGradientParameterSet.
GFX_GOL_PanelParameterSet This is function GFX_GOL_PanelParameterSet.
GFX_GOL_TwoTonePanelDraw This is function GFX_GOL_TwoTonePanelDraw.
Macros
Name Description
GFX_GOL_ObjectStateClear This function clears the state bits of the given object.
GFX_GOL_ObjectStateGet This function retrieves the current value of the state bits of an object.
GFX_GOL_ObjectStateSet This function sets the state bits of the given object.
Structures
Name Description
GFX_GOL_MESSAGE Specifies message structure used in the library.
GFX_GOL_OBJ_HEADER Specifies Graphics Object Layer structure used in objects.
GOL_PANEL_PARAM Specifies panel parameters.
Types
Name Description
GFX_GOL_DRAW_CALLBACK_FUNC Draw callback function defintion. This application defined function allows
the application to perform application specific rendering.
GFX_GOL_TRANSLATED_ACTION, \
GFX_GOL_OBJ_HEADER *, \
GFX_GOL_MESSAGE * \ )
Message callback function defintion. This application defined function
allows the application to perform application specific processing of user
messsages.
File Name
gfx_gol.h
Company
Microchip Technology Inc.
5.2.2.8.7 gfx_gol_analog_clock.h
Graphics Library Implementation
Refer to Microchip Graphics Library for complete documentation of the AnalogClock Object.
Functions
Name Description
GFX_AnalogClockCreate Creates a analog clock object.
GFX_GOL_AnalogClockDraw This function renders the object on the screen using the current parameter
settings. Location of the object is determined by the left, top, right and bottom
parameters. The colors used are dependent on the state of the object. The
font used is determined by the style scheme set.
GFX_GOL_AnalogClockHandsDraw Draws the current position of the clock hands with the given thickness and
color.
GFX_GOL_AnalogClockHourSet Sets the hour value of the analog clock.
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GFX_GOL_AnalogClockMinuteSet Sets the minute value of the analog clock.
GFX_GOL_AnalogClockSecondSet Sets the second value of the analog clock.
Macros
Name Description
GFX_GOL_ANALOGCLOCK_DISABLED Bit for disabled state.
GFX_GOL_ANALOGCLOCK_DRAW Bit to indicate button must be redrawn.
GFX_GOL_ANALOGCLOCK_HIDE Bit to indicate button must be removed from screen.
GFX_GOL_ANALOGCLOCK_PRESSED Bit for press state.
GFX_GOL_ANALOGCLOCK_TICK Bit to tick second hand
GFX_GOL_ANALOGCLOCK_UPDATE_HOUR Bit to indicate hour hand must be redrawn
GFX_GOL_ANALOGCLOCK_UPDATE_MINUTE Bit to indicate minute hand must be redrawn
GFX_GOL_ANALOGCLOCK_UPDATE_SECOND Bit to indicate minute hand must be redrawn
Structures
Name Description
5.2.2.8.8 gfx_gol_button.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the GFX_GOL_BUTTON Object.
Enumerations
Name Description
GFX_GOL_BUTTON_STATE Object States Definition:
Functions
Name Description
GFX_GOL_ButtonActionGet This function evaluates the message from a user if the message will affect
the object or not.
GFX_GOL_ButtonActionSet This function performs the state change of the object based on the translated
action.
GFX_GOL_ButtonCreate This function creates a GFX_GOL_BUTTON object with the parameters
given. It automatically attaches the new object into a global linked list of
objects and returns the address of the object.
GFX_GOL_ButtonDraw This function renders the object on the screen based on the current state of
the object.
GFX_GOL_ButtonTextAlignmentGet This function returns the text alignment of the text string used by the object.
GFX_GOL_ButtonTextAlignmentSet This function sets the text alignment of the text string used by the object.
GFX_GOL_ButtonTextSet This function sets the address of the current text string used by the object.
Macros
Name Description
GFX_GOL_ButtonPressStateImageGet This function gets the image used when in the pressed state.
GFX_GOL_ButtonPressStateImageSet This function sets the image to be used when in the pressed state.
GFX_GOL_ButtonReleaseStateImageGet This function gets the image used when in the released state.
GFX_GOL_ButtonReleaseStateImageSet This function sets the image to be used when in the released state.
GFX_GOL_ButtonTextGet This function returns the address of the current text string used by the
object.
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Structures
Name Description
5.2.2.8.9 gfx_gol_chart.h
• Module for Microchip Graphics Library
• GOL Layer
• Chart
***************************************************************************
• FileName: gfx_chart.h
• Dependencies: None
• Processor: PIC24F, PIC24H, dsPIC, PIC32
• Compiler: MPLAB C30, MPLAB C32
• Linker: MPLAB LINK30, MPLAB LINK32
• Company: Microchip Technology Incorporated
*
• Software License Agreement
*
• Copyright © 2008 Microchip Technology Inc. All rights reserved.
• Microchip licenses to you the right to use, modify, copy and distribute
• Software only when embedded on a Microchip microcontroller or digital
• signal controller, which is integrated into your product or third party
• product (pursuant to the sublicense terms in the accompanying license
• agreement).
*
• You should refer to the license agreement accompanying this Software
• for additional information regarding your rights and obligations.
*
• SOFTWARE AND DOCUMENTATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY
• KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY
• OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
• PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
• OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION,
• BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
• DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL,
• INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
• COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY
• CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
• OR OTHER SIMILAR COSTS.
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*
• Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
• 4/8/08 ...
Functions
Name Description
GFX_GOL_ChartActionGet This function evaluates the message from a user if the message will affect
the object or not. The table below enumerates the translated messages for
each event of the touch screen and keyboard inputs.
GFX_GOL_ChartCreate This function creates a CHART object with the parameters given. It
automatically attaches the new object into a global linked list of objects and
returns the address of the object.
GFX_GOL_ChartDataSeriesAdd This function creates a DATASERIES object and populates the structure
with the given parameters.
GFX_GOL_ChartDataSeriesFree This function removes DATASERIES object from the list of DATASERIES
objects and frees the memory used of that removed object.
GFX_GOL_ChartDataSeriesRemove This function removes DATASERIES object from the list of DATASERIES
objects and frees the memory used of that removed object. The position of
the object to be removed is specified by the number parameter. If the list has
only one member, it removes the member regardless of the number given.
GFX_GOL_ChartDataSeriesSet This is function GFX_GOL_ChartDataSeriesSet.
GFX_GOL_ChartDraw This function renders the object on the screen using the current parameter
settings. Location of the object is determined by the left, top, right and
bottom parameters. The colors used are dependent on the state of the
object. The font used is determined by the style scheme set.
The colors of the bars of the bar chart or sectors of the pie chart can be the
default color table or user defined color table set by ChSetColorTable()
function.
When rendering objects of the same type, each object must be rendered
completely before the rendering of the next object is started.... more
GFX_GOL_ChartPercentRangeSet This function sets the minimum and maximum range of percentage that the
bar chart will show. The criteria is that min <= max. This affects bar charts
only and CH_PERCENTAGE bit state is set.
GFX_GOL_ChartSampleRangeSet This function sets the sample start and sample end when drawing the chart.
Together with the data series' SHOW_DATA flags the different way of
displaying the chart data is achieved.
GFX_GOL_ChartValueRangeSet This function sets the minimum and maximum range of values that the bar
chart will show. The criteria is that min <= max.
Macros
Name Description
CH_CLR0 Bright Blue
CH_CLR1 Bright Red
CH_CLR10 Light Blur
CH_CLR11 Light Red
CH_CLR12 Light Green
CH_CLR13 Light Yellow
CH_CLR14 Light Orange
CH_CLR15 Gold
CH_CLR2 Bright Green
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CH_CLR3 Bright Yellow
CH_CLR4 Orange
CH_CLR5 Blue
CH_CLR6 Red
CH_CLR7 Green
CH_CLR8 Yellow
CH_CLR9 Dark Orange
CHART_MARGIN Margin from the edges.
CHART_YGRIDCOUNT defines the number of grids to be drawn on the y-axis (includes the origin
at y).
GFX_GOL_CHART_3D_ENABLE Bit to indicate that bar charts are to be drawn with 3-D effect
GFX_GOL_CHART_BAR Bit to indicate the chart is type bar. If both PIE and BAR types are set BAR
type has higher priority.
GFX_GOL_CHART_BAR_HOR These bits (with CH_BAR bit set), sets the bar chart to be drawn
horizontally.
GFX_GOL_CHART_DISABLED Bit for disabled state.
GFX_GOL_CHART_DONUT These bits (with CH_PIE bit set), sets the pie chart to be drawn in a donut
shape.
GFX_GOL_CHART_DRAW Bit to indicate chart must be redrawn.
GFX_GOL_CHART_DRAW_DATA Bit to indicate data portion of the chart must be redrawn.
GFX_GOL_CHART_HIDE Bit to indicate chart must be removed from screen.
GFX_GOL_CHART_LEGEND Bit to indicate that legend is to be shown. Usable only when seriesCount >
1.
GFX_GOL_CHART_NUMERIC This bit is used only for bar charts. If this bit is set, it indicates that the bar
chart labels for variables are numeric. If this bit is not set, it indicates that
the bar chart labels for variables are alphabets.
GFX_GOL_CHART_PERCENT Bit to indicate that the pie chart will be drawn with percentage values
shown for the sample data. For bar chart, if CH_VALUE is set, it toggles
the value shown to percentage.
GFX_GOL_CHART_PIE Bit to indicate the chart is type pie. If both PIE and BAR types are set BAR
type has higher priority.
GFX_GOL_CHART_VALUE Bit to indicate that the values of the bar chart data or pie chart data are to
be shown
GFX_GOL_ChartAxisLabelFontGet Macros: GFX_GOL_ChartAxisLabelFontGet(pCh)
This macro returns the location of the font used for the X and Y axis labels
of the chart.
GFX_GOL_ChartAxisLabelFontSet Macros: GFX_GOL_ChartAxisLabelFontSet(pCh, pNewFont)
This macro sets the location of the font used for the X and Y axis labels of
the chart.
GFX_GOL_ChartColorTableGet Macros: GFX_GOL_ChartColorTableGet(pCh)
This macro returns the current color table used for the pie and bar charts.
GFX_GOL_ChartColorTableSet Macros: GFX_GOL_ChartColorTableSet(pCh, pNewTable)
This macro sets the color table used to draw the data in pie and bar charts.
GFX_GOL_ChartGridLabelFontGet Macros: GFX_GOL_ChartGridLabelFontGet(pCh)
This macro returns the location of the font used for the X and Y axis grid
labels of the chart.
GFX_GOL_ChartGridLabelFontSet Macros: GFX_GOL_ChartGridLabelFontSet(pCh, pNewFont)
This macro sets the location of the font used for the X and Y axis grid
labels of the chart.
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GFX_GOL_ChartPercentMaxGet Macros: ChGetPercentMax(pCh)
This macro returns the current maximum value of the percentage range
that will be drawn for bar charts when CH_PERCENTAGE bit state is set.
GFX_GOL_ChartPercentMinGet Macros: ChGetPercentMin(pCh)
This macro returns the current minimum value of the percentage range
that will be drawn for bar charts when CH_PERCENTAGE bit state is set.
GFX_GOL_ChartPercentRangeGet This macro gets the percentage range for bar charts. The value returned
is calculated from percentage max - min. To get the minimum use
ChGetPercentMin() and to get the maximum use ChGetPercentMax().
GFX_GOL_ChartSampleEndGet Macros: GFX_GOL_ChartSampleEndGet(pCh)
This macro returns the sampling end value.
GFX_GOL_ChartSampleLabelGet Macros: GFX_GOL_ChartSampleLabelGet(pCh)
This macro returns the address of the current text string used for the
sample axis label of the bar chart.
GFX_GOL_ChartSampleLabelSet Macros: GFX_GOL_ChartSampleLabelSet(pCh, pNewXLabel)
This macro sets the address of the current text string used for the sample
axis label of the bar chart.
GFX_GOL_ChartSampleRangeGet This macro gets the sample range for pie or bar charts. The value
returned is calculated from smplEnd - smplStart.
GFX_GOL_ChartSampleStartGet Macros: GFX_GOL_ChartSampleStartGet(pCh)
This macro returns the sampling start value.
GFX_GOL_ChartSeriesHide Macros: GFX_GOL_ChartSeriesHide(CHART *pCh, uint16_t seriesNum)
This macro sets the specified data series number show flag to be set to
HIDE_DATA.
GFX_GOL_ChartShowSeriesCountGet Macros: GFX_GOL_ChartShowSeriesCountGet(pCh)
This macro shows the number of data series that has its show flag set to
SHOW_DATA
GFX_GOL_ChartShowSeriesSet Macros: short GFX_GOL_ChartShowSeriesSet(CHART *pCh, uint16_t
seriesNum)
This macro sets the specified data series number show flag to be set to
SHOW_DATA.
GFX_GOL_ChartShowSeriesStatusGet Macros: GFX_GOL_ChartShowSeriesStatusGet(pDSeries)
This macro returns the show ID status of the DATASERIES.
GFX_GOL_ChartTitleFontGet Macros: GFX_GOL_ChartTitleFontGet(pCh)
This macro returns the location of the font used for the title of the chart.
GFX_GOL_ChartTitleFontSet Macros: GFX_GOL_ChartTitleFontSet(pCh, pNewFont)
This macro sets the location of the font used for the title of the chart.
GFX_GOL_ChartTitleGet Macros: GFX_GOL_ChartTitleGet(pCh)
This macro returns the address of the current text string used for the title
of the chart.
GFX_GOL_ChartTitleSet Macros: GFX_GOL_ChartTitleSet(pCh, pNewTitle)
This macro sets the address of the current text string used for the title of
the chart.
GFX_GOL_ChartValueLabelGet Macros: GFX_GOL_ChartValueLabelGet(pCh)
This macro returns the address of the current text string used for the value
axis label of the bar chart.
GFX_GOL_ChartValueLabelSet Macros: GFX_GOL_ChartValueLabelSet(pCh, pNewYLabel)
This macro sets the address of the current text string used for the value
axis label of the bar chart.
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GFX_GOL_ChartValueMaxGet Macros: GFX_GOL_ChartValueMaxGet(pCh)
This macro returns the current maximum value that will be drawn for bar
charts.
GFX_GOL_ChartValueMinGet Macros: GFX_GOL_ChartValueMinGet(pCh)
This macro returns the current minimum value that will be drawn for bar
charts.
GFX_GOL_ChartValueRangeGet This macro gets the current range for bar charts. The value returned is
calculated from the current (valMax - valMin) set. To get the minimum use
ChGetValueMin() and to get the maximum use ChGetValueMax().
HIDE_DATA Macro used to reset the data series show flag or indicate that the data
series will be not be shown when the chart is drawn.
SHOW_DATA Macro used to set the data series show flag or indicate that the data
series will be shown when the chart is drawn.
USE_HORZ_ASCENDING_ORDER use ascending order when displaying variables on horizontal mode (bar
chart only)
USE_PIE_ENABLE_LABEL use labels: A:10%,30 where each sample is labeled A-Z followed by a
colon.
Structures
Name Description
CHARTPARAM Defines the parameters for the CHART object.
DATASERIES Defines a variable for the CHART object. It specifies the number of samples,
pointer to the array of samples for the data series and pointer to the next data
series. A member of this structure (show) is used as a flag to determine if the
series is to be drawn or not. Together with the smplStart and smplEnd it will
determine what kind of chart will be drawn.
GFX_GOL_CHART Defines the parameters required for a chart Object.
5.2.2.8.10 gfx_gol_check_box.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the CheckBox Object.
Enumerations
Name Description
5.2.2.8.11 gfx_gol_custom_control.h
Graphics Library Implementation
Refer to Microchip Graphics Library for complete documentation of the CustomControl Object.
Functions
Name Description
GFX_GOL_CustomControlActionGet translates the GOL message for the custom control
GFX_GOL_CustomControlActionSet changes the state of the object
GFX_GOL_CustomControlCreate creates the custom control
GFX_GOL_CustomControlDraw draws custom control
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Macros
Name Description
GFX_GOL_CUSTOMCONTROL_DISABLED disabled
GFX_GOL_CUSTOMCONTROL_DRAW whole control must be redrawn
GFX_GOL_CUSTOMCONTROL_DRAW_BAR control bar should be redrawn
GFX_GOL_CUSTOMCONTROL_HIDE must be removed from screen
GFX_GOL_CustomControlGetPos Macros: GFX_GOL_CustomControlGetPos(pCc)
returns position
GFX_GOL_CustomControlSetPos Macros: GFX_GOL_CustomControlSetPos(pCc,position)
sets the current position of the control
Structures
Name Description
GFX_GOL_CUSTOMCONTROL The structure contains data for the control
Company
Microchip Technology Inc.
FileName: gfx_gol_custom_control.c
5.2.2.8.12 gfx_gol_digital_meter.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the Digital Meter Object.
Enumerations
Name Description
GFX_GOL_DIGITALMETER_STATE Object States Definition:
Functions
Name Description
GFX_GOL_DigitalMeterActionGet This function evaluates the message from a user if the message will affect the
object or not.
GFX_GOL_DigitalMeterCreate This function creates a GFX_GOL_DIGITALMETER object with the
parameters given. It automatically attaches the new object into a global linked
list of objects and returns the address of the object.
GFX_GOL_DigitalMeterDecrement This function decrements the meter value by the delta value set.
GFX_GOL_DigitalMeterDraw This function renders the object on the screen based on the current state of
the object.
GFX_GOL_DigitalMeterIncrement This function increments the meter value by the delta value set.
GFX_GOL_DigitalMeterValueSet This function sets the value of the meter.
Macros
Name Description
GFX_GOL_DIGITALMETER_INDENT This is a DigitalMeter compile time option to define the indent constant
for the text used in the frame.
GFX_GOL_DIGITALMETER_WIDTH This is a DigitalMeter compile time option to define the user should
change this value depending on the number of digits he wants to
display.
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GFX_GOL_DigitalMeterTextAlignmentGet This function returns the text alignment of the text string used by the
object.
GFX_GOL_DigitalMeterTextAlignmentSet This function sets the text alignment of the text string used by the object.
GFX_GOL_DigitalMeterValueGet This function returns the current value of the digital meter.
Structures
Name Description
GFX_GOL_DIGITALMETER Properties for a digital meter.
File Name
gfx_gol_digital_meter.h
Company
Microchip Technology Inc.
5.2.2.8.13 gfx_gol_edit_box.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the Edit Box Object.
Enumerations
Name Description
GFX_GOL_EDITBOX_STATE Object States Definition:
Functions
Name Description
GFX_GOL_EditBoxActionGet This function evaluates the message from a user if the message will affect the
object or not.
GFX_GOL_EditBoxActionSet This function performs the state change of the object based on the translated
action.
GFX_GOL_EditBoxCharAdd This function adds a character at the end of the text used by the object.
GFX_GOL_EditBoxCharRemove This function removes a character at the end of the text used by the object.
GFX_GOL_EditBoxCreate This function creates a GFX_GOL_EDITBOX object with the parameters given. It
automatically attaches the new object into a global linked list of objects and
returns the address of the object.
GFX_GOL_EditBoxDraw This function renders the object on the screen based on the current state of the
object.
GFX_GOL_EditBoxTextSet This function sets the text in the object.
Macros
Name Description
GFX_GOL_EditBoxTextAlignmentGet This function returns the text alignment of the text string used by the object.
GFX_GOL_EditBoxTextAlignmentSet This function sets the text alignment of the text string used by the object.
GFX_GOL_EditBoxTextGet This function returns the address of the current text string used by the
object.
Structures
Name Description
GFX_GOL_EDITBOX Defines the parameters required for a Edit Box Object.
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File Name
gfx_gol_edit_box.h
Company
Microchip Technology Inc.
5.2.2.8.14 gfx_gol_font_default.h
AUTO-GENERATED CODE: Graphics Resource Converter version: 4.00.39 BETA
This file is generated by the Graphics Resource Converter containing resources such as images and fonts that can be used by
Microchip's Graphics Library, which is part of the MLA.
Macros
Name Description
GFX_GOL_FONT_DEFAULT_H_FILE
File Name
gfx_gol_font_default.h
Company
Microchip Technology, Inc.
5.2.2.8.15 gfx_gol_grid.h
• Module for Microchip Graphics Library
• Grid control
***************************************************************************
• FileName: gfx_grid.h
• Dependencies: none
• Processor: PIC24F, PIC24H, dsPIC, PIC32
• Compiler: MPLAB C30, MPLAB C32
• Linker: MPLAB LINK30, MPLAB LINK32
• Company: Microchip Technology Incorporated
*
• Software License Agreement
*
• Copyright © 2008 Microchip Technology Inc. All rights reserved.
• Microchip licenses to you the right to use, modify, copy and distribute
• Software only when embedded on a Microchip microcontroller or digital
• signal controller, which is integrated into your product or third party
• product (pursuant to the sublicense terms in the accompanying license
• agreement).
*
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• You should refer to the license agreement accompanying this Software
• for additional information regarding your rights and obligations.
*
• SOFTWARE AND DOCUMENTATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY
• KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY
• OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
• PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
• OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION,
• BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
• DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL,
• INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
• COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY
• CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
• OR OTHER SIMILAR COSTS.
*
• Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
• 02/29/08 ...
• 04/16/10 Added Grid Item as text.
Functions
Name Description
GridClearCellState This function clears the state of the cell (or Grid Item) specified by the column and
row.
GridCreate This function creates a GRID object with the parameters given. It automatically
attaches the new object into a global linked list of objects and returns the address
of the object.
GridDraw This function renders the object on the screen using the current parameter
settings. Location of the object is determined by the left, top, right and bottom
parameters. The colors used are dependent on the state of the object. The font
used is determined by the style scheme set.
When rendering objects of the same type, each object must be rendered
completely before the rendering of the next object is started. This is to avoid
incomplete object rendering.
GridFreeItems This function removes all grid items for the given Grid and frees the memory used.
GridGetCell This function removes all grid items for the given Grid and frees the memory used.
GridMsgDefault This function performs the actual state change based on the translated message
given. The following state changes are supported:
GridSetCell This function sets the Grid Item state and data.
GridSetCellState This function sets the state of the Grid Item or cell.
GridSetFocus This function sets the focus of the specified Grid Item or cell.
GridTranslateMsg This function evaluates the message from a user if the message will affect the
object or not. The table below enumerates the translated messages for each event
of the touch screen and keyboard inputs.
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Macros
Name Description
GRID_DISABLED Bit for disabled state
GRID_DRAW_ALL Bit to indicate whole edit box must be redrawn
GRID_DRAW_ITEMS Bit to indicate that at least one item must be redrawn, but not the entire grid.
GRID_FOCUSED Bit for focused state
GRID_HEIGHT This is macro GRID_HEIGHT.
GRID_HIDE Bit to remove object from screen
GRID_MAX_COLUMNS This is macro GRID_MAX_COLUMNS.
GRID_MAX_ROWS This is macro GRID_MAX_ROWS.
GRID_OUT_OF_BOUNDS Status of an out of bounds cell GridSetCell() operation.
GRID_SHOW_BORDER_ONLY Draw only the outside border of the grid.
GRID_SHOW_FOCUS Highlight the focused cell.
GRID_SHOW_LINES Display grid lines
GRID_SHOW_SEPARATORS_ONLY Draw only the lines between cells (like Tic-tac-toe)
GRID_SUCCESS Status of a successful GridSetCell() operation.
GRID_TYPE_MASK This is macro GRID_TYPE_MASK.
GRID_WIDTH This is macro GRID_WIDTH.
GridGetFocusX Macros: GridGetFocusX(pGrid)
This macro returns the x position of the focused cell.
GridGetFocusY Macros: GridGetFocusY(pGrid)
This macro returns the y position of the focused cell.
GRIDITEM_DRAW Draw this cell
GRIDITEM_IS_BITMAP The grid item is a bitmap.
GRIDITEM_IS_TEXT The grid item is a text string.
GRIDITEM_SELECTED The cell is selected.
GRIDITEM_TEXTBOTTOM Bit to indicate text is top aligned.
GRIDITEM_TEXTLEFT Text in the cell is left aligned.
GRIDITEM_TEXTRIGHT Text in the cell is right aligned.
GRIDITEM_TEXTTOP Bit to indicate text is bottom aligned.
Structures
Name Description
GRID Defines the parameters required for a grid Object. Clipping is not supported in grid
object.
GRIDITEM Defines the grid item.
5.2.2.8.16 gfx_gol_group_box.h
Graphics Library Implementation
Refer to Microchip Graphics Library for complete documentation of the Group Box Object.
Enumerations
Name Description
GFX_GOL_GROUPBOX_STATE Object States Definition:
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Functions
Name Description
GFX_GOL_GroupboxActionGet This function evaluates the message from a user if the message will affect
the object or not.
GFX_GOL_GroupboxCreate This function creates a GFX_GOL_GROUPBOX object with the
parameters given. It automatically attaches the new object into a global
linked list of objects and returns the address of the object.
GFX_GOL_GroupboxDraw This function renders the object on the screen based on the current state
of the object.
GFX_GOL_GroupboxTextAlignmentGet This function returns the text alignment of the text string used by the
object.
GFX_GOL_GroupboxTextAlignmentSet This function sets the text alignment of the text string used by the object.
GFX_GOL_GroupboxTextSet This function sets the address of the current text string used by the object.
Macros
Name Description
GFX_GOL_GroupboxTextGet This function returns the address of the current text string used by the object.
Structures
Name Description
GFX_GOL_GROUPBOX Defines the parameters required for a group box Object. The textwidth and
textHeight is not checked with the actual dimension of the object. Clipping is not
supported in group box object. It is possible for the text to exceed the dimension of
the Object.
Company
Microchip Technology Inc.
FileName: gfx_gol_group_box.h
5.2.2.8.17 gfx_gol_list_box.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the ListBox Object.
Enumerations
Name Description
GFX_GOL_LISTBOX_ITEM_STATUS Bit definitions for the status of an item
GFX_GOL_LISTBOX_STATE This is type GFX_GOL_LISTBOX_STATE.
Functions
Name Description
GFX_GOL_ListBoxActionGet This function evaluates the message from a user if the message will
affect the object or not.
GFX_GOL_ListBoxActionSet This function performs the state change of the object based on the
translated action.
GFX_GOL_ListBoxCreate This function creates a GFX_GOL_LISTBOX object with the parameters
given. It automatically attaches the new object into a global linked list of
objects and returns the address of the object.
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GFX_GOL_ListBoxDraw This function renders the object on the screen based on the current state
of the object.
GFX_GOL_ListBoxItemAdd This function adds an item to the list box.
GFX_GOL_ListBoxItemFocusGet This function returns the index of the focused item in the list box.
GFX_GOL_ListBoxItemFocusSet This function sets the focus of the item with the index number specified by
index.
GFX_GOL_ListBoxItemListRemove This function removes the entire items list of the list box and free the
memory used.
GFX_GOL_ListBoxItemRemove This function removes an item from the list box and free the memory used.
GFX_GOL_ListBoxSelectionChange This function changes the selection status of the given item in the list box.
GFX_GOL_ListBoxSelectionGet This function searches for selected items from the list box.
GFX_GOL_ListBoxVisibleItemCountGet This function returns the count of items visible in the list box.
Macros
Name Description
GFX_GOL_ListBoxItemCountGet This function returns the count of items in the list box.
GFX_GOL_ListBoxItemImageGet This function gets the image set for a list box item.
GFX_GOL_ListBoxItemImageSet This function sets the image for a list box item.
GFX_GOL_ListBoxItemListGet This function returns the pointer to the item list of the list box.
GFX_GOL_ListBoxItemSelectStatusClear This function clears the selection status of the item.
GFX_GOL_ListBoxItemSelectStatusSet This function sets the selection status of the item to selected.
GFX_GOL_ListBoxTextAlignmentGet This function returns the text alignment of the text string used by the
object.
GFX_GOL_ListBoxTextAlignmentSet This function sets the text alignment of the text string used by the object.
Structures
Name Description
GFX_GOL_LISTBOX Defines the parameters required for a list box Object.
GFX_GOL_LISTITEM Defines the parameters required for a list item used in list box.
File Name
gfx_gol_list_box.h
Company
Microchip Technology Inc.
5.2.2.8.18 gfx_gol_meter.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the Meter Object.
Enumerations
Name Description
5.2.2.8.19 gfx_gol_picture.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the Picture Object.
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Enumerations
Name Description
GFX_GOL_PICTURECONTROLCONTROL_STATE Object States Definition:
Functions
Name Description
GFX_GOL_PictureControlActionGet This function evaluates the message from a user if the message will affect the
object or not.
GFX_GOL_PictureControlCreate This function creates a GFX_GOL_PICTURECONTROL object with the
parameters given. It automatically attaches the new object into a global linked
list of objects and returns the address of the object.
GFX_GOL_PictureControlDraw This function renders the object on the screen based on the current state of
the object.
GFX_GOL_PictureControlPartialSet This function sets the partial image parameters to be in the object.
Macros
Name Description
GFX_GOL_PictureControlImageGet This function gets the image used when in the pressed state.
GFX_GOL_PictureControlImageSet This function sets the image to be in the object.
GFX_GOL_PictureControlScaleSet Sets the scale factor used to render the bitmap used in the object.
Structures
Name Description
GFX_GOL_PICTURECONTROL The structure contains data for picture control
File Name
gfx_gol_picture.h
Company
Microchip Technology Inc.
5.2.2.8.20 gfx_gol_progress_bar.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the ProgressBar Object.
Enumerations
Name Description
GFX_GOL_PROGRESSBAR_STATE Object States Definition:
Functions
Name Description
GFX_GOL_ProgressBarActionGet This function evaluates the message from a user if the message will affect the
object or not.
GFX_GOL_ProgressBarCreate This function creates a GFX_GOL_PROGRESSBAR object with the
parameters given. It automatically attaches the new object into a global linked
list of objects and returns the address of the object.
GFX_GOL_ProgressBarDraw This function renders the object on the screen based on the current state of
the object.
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GFX_GOL_ProgressBarPositionSet This function sets the position of the progress bar.
GFX_GOL_ProgressBarRangeSet This function sets the range of the progress bar.
Macros
Name Description
GFX_GOL_ProgressBarPositionGet This function returns the current position of the progress bar.
GFX_GOL_ProgressBarRangeGet This function returns the range of the progress bar.
Structures
Name Description
GFX_GOL_PROGRESSBAR The structure contains data for the progress bar
File Name
gfx_gol_progress_bar.h
Company
Microchip Technology Inc.
5.2.2.8.21 gfx_gol_radio_button.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the RadioButton Object.
Enumerations
Name Description
GFX_GOL_RADIOBUTTON_STATE Object States Definition:
Functions
Name Description
GFX_GOL_RadioButtonActionGet This function evaluates the message from a user if the message will
affect the object or not.
GFX_GOL_RadioButtonActionSet This function performs the state change of the object based on the
translated action.
GFX_GOL_RadioButtonCheckGet This function returns the ID of the currently checked radio button in the
group.
GFX_GOL_RadioButtonCheckSet This function sets the ID of the currently checked radio button in the
group.
GFX_GOL_RadioButtonCreate This function creates a GFX_GOL_RADIOBUTTON object with the
parameters given. It automatically attaches the new object into a global
linked list of objects and returns the address of the object.
GFX_GOL_RadioButtonDraw This function renders the object on the screen based on the current
state of the object.
GFX_GOL_RadioButtonTextAlignmentGet This function returns the text alignment of the text string used by the
object.
GFX_GOL_RadioButtonTextAlignmentSet This function sets the text alignment of the text string used by the
object.
GFX_GOL_RadioButtonTextSet This function sets the address of the current text string used by the
object.
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Macros
Name Description
GFX_GOL_RadioButtonTextGet This function returns the address of the current text string used by the object.
Structures
Name Description
GFX_GOL_RADIOBUTTON the structure contains data for the Radio Button
File Name
gfx_gol_radio_button.h
Company
Microchip Technology Inc.
5.2.2.8.22 gfx_gol_round_dial.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the Round dial Object.
Functions
Name Description
GFX_GOL_RoundDailActionGet This function evaluates the message from a user if the message will affect the
object or not. The table below enumerates the translated messages for each
event of the touch screen inputs.
GFX_GOL_RoundDailActionSet This function performs the actual state change based on the translated message
given. The following state changes are supported:
GFX_GOL_RoundDialCreate This function creates a ROUNDDIAL object with the parameters given.
GFX_GOL_RoundDialDraw This function renders the object on the screen using the current parameter
settings. Location of the object is determined by the center (x,y) postion and the
radius parameters. The colors used are dependent on the state of the object.
When rendering objects of the same type, each object must be rendered
completely before the rendering of the next object is started. This is to avoid
incomplete object rendering.
RdiaCosine This is function RdiaCosine.
RdiaSine This is function RdiaSine.
Macros
Name Description
GFX_GOL_ROUNDDIAL_DISABLED Bit for disabled state.
GFX_GOL_ROUNDDIAL_DRAW Bit to indicate object must be redrawn.
GFX_GOL_ROUNDDIAL_HIDE Bit to indicate object must be removed from screen.
GFX_GOL_ROUNDDIAL_MAX_POSITIONS This is macro GFX_GOL_ROUNDDIAL_MAX_POSITIONS.
GFX_GOL_ROUNDDIAL_QUADRANT_POSITIONS This is macro
GFX_GOL_ROUNDDIAL_QUADRANT_POSITIONS.
GFX_GOL_ROUNDDIAL_ROT_CCW Bit for rotate counter clockwise state.
GFX_GOL_ROUNDDIAL_ROT_CW Bit for rotate clockwise state.
GFX_GOL_RoundDialValueDecrement Used to directly decrement the value. The delta change used
is the resolution setting (res).
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GFX_GOL_RoundDialValueGet Returns the current dial value. Value is always in the 0-max
range inclusive.
GFX_GOL_RoundDialValueIncrement Used to directly increment the value. The delta change used
is the resolution setting (res).
GFX_GOL_RoundDialValueSet Sets the value to the given new value. Value set must be in
0-max range inclusive.
Structures
Name Description
GFX_GOL_ROUNDDIAL Defines the parameters required for a dial Object.
Company
Microchip Technology Inc.
FileName: gfx_gol_round_dial.h
5.2.2.8.23 gfx_gol_scan_codes.h
Module for Microchip Graphics Library - Graphic Object Layer
This header file contains scan codes for the standard AT keyboard that can be used to process user action in GOL messages.
Macros
Name Description
SCAN_BS_PRESSED Back space key pressed.
SCAN_BS_RELEASED Back space key released.
SCAN_CR_PRESSED Carriage return pressed.
SCAN_CR_RELEASED Carriage return released.
SCAN_CRA_PRESSED Carriage return alternate pressed.
SCAN_CRA_RELEASED Carriage return alternate released.
SCAN_DEL_PRESSED Delete key pressed.
SCAN_DEL_RELEASED Delete key released.
SCAN_DOWN_PRESSED Down key pressed.
SCAN_DOWN_RELEASED Down key released.
SCAN_END_PRESSED End key pressed.
SCAN_END_RELEASED End key released.
SCAN_HOME_PRESSED Home key pressed.
SCAN_HOME_RELEASED Home key released.
SCAN_LEFT_PRESSED Left key pressed.
SCAN_LEFT_RELEASED Left key released.
SCAN_PGDOWN_PRESSED Page down key pressed.
SCAN_PGDOWN_RELEASED Page down key released.
SCAN_PGUP_PRESSED Page up key pressed.
SCAN_PGUP_RELEASED Page up key released.
SCAN_RIGHT_PRESSED Right key pressed.
SCAN_RIGHT_RELEASED Right key released.
SCAN_SPACE_PRESSED Space key pressed.
SCAN_SPACE_RELEASED Space key released.
SCAN_TAB_PRESSED Tab key pressed.
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SCAN_TAB_RELEASED Tab key released.
SCAN_UP_PRESSED Up key pressed.
SCAN_UP_RELEASED Up key released.
File Name
gfx_gol_scan_codes.h
Company
Microchip Technology Inc.
5.2.2.8.24 gfx_gol_scheme.h
Module for Microchip Graphics Library - Graphic Object Layer Scheme
This module implements the common routines for the Graphics Object Layer of the Microchip Graphics Library. The routines are
independent of the Display Driver Layer and should be compatible with any Display Driver that is compliant with the
requirements of the Display Driver Layer of the Graphics Library. The module utilizes the Graphics Primitive Layer to render the
objects.
Functions
Name Description
GFX_GOL_SchemeAlphaPrecentSet This is function GFX_GOL_SchemeAlphaPrecentSet.
GFX_GOL_SchemeBackgroundColorGet This is function GFX_GOL_SchemeBackgroundColorGet.
GFX_GOL_SchemeBackgroundColorSet This is function GFX_GOL_SchemeBackgroundColorSet.
GFX_GOL_SchemeBackgroundImageSet This is function GFX_GOL_SchemeBackgroundImageSet.
GFX_GOL_SchemeBackgroundTypeGet This is function GFX_GOL_SchemeBackgroundTypeGet.
GFX_GOL_SchemeBackgroundTypeSet This is function GFX_GOL_SchemeBackgroundTypeSet.
GFX_GOL_SchemeColor0Get This is function GFX_GOL_SchemeColor0Get.
GFX_GOL_SchemeColor0Set This is function GFX_GOL_SchemeColor0Set.
GFX_GOL_SchemeColor1Get This is function GFX_GOL_SchemeColor1Get.
GFX_GOL_SchemeColor1Set This is function GFX_GOL_SchemeColor1Set.
GFX_GOL_SchemeColorDisabledGet This is function GFX_GOL_SchemeColorDisabledGet.
GFX_GOL_SchemeColorDisabledSet This is function GFX_GOL_SchemeColorDisabledSet.
GFX_GOL_SchemeColorSet This is function GFX_GOL_SchemeColorSet.
GFX_GOL_SchemeEmbossDarkColorGet This is function GFX_GOL_SchemeEmbossDarkColorGet.
GFX_GOL_SchemeEmbossDarkColorSet This is function GFX_GOL_SchemeEmbossDarkColorSet.
GFX_GOL_SchemeEmbossLightColorGet This is function GFX_GOL_SchemeEmbossLightColorGet.
GFX_GOL_SchemeEmbossLightColorSet This is function GFX_GOL_SchemeEmbossLightColorSet.
GFX_GOL_SchemeEmbossSet This is function GFX_GOL_SchemeEmbossSet.
GFX_GOL_SchemeEmbossSizeGet This is function GFX_GOL_SchemeEmbossSizeGet.
GFX_GOL_SchemeEmbossSizeSet This is function GFX_GOL_SchemeEmbossSizeSet.
GFX_GOL_SchemeFillStyleGet This is function GFX_GOL_SchemeFillStyleGet.
GFX_GOL_SchemeFillStyleSet This is function GFX_GOL_SchemeFillStyleSet.
GFX_GOL_SchemeFontGet This is function GFX_GOL_SchemeFontGet.
GFX_GOL_SchemeFontSet This is function GFX_GOL_SchemeFontSet.
GFX_GOL_SchemeGradientColorSet This is function GFX_GOL_SchemeGradientColorSet.
GFX_GOL_SchemeGradientEndColorGet This is function GFX_GOL_SchemeGradientEndColorGet.
GFX_GOL_SchemeGradientEndColorSet This is function GFX_GOL_SchemeGradientEndColorSet.
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GFX_GOL_SchemeGradientStartColorGet This is function GFX_GOL_SchemeGradientStartColorGet.
GFX_GOL_SchemeGradientStartColorSet This is function GFX_GOL_SchemeGradientStartColorSet.
GFX_GOL_SchemeTextColor0Get This is function GFX_GOL_SchemeTextColor0Get.
GFX_GOL_SchemeTextColor0Set This is function GFX_GOL_SchemeTextColor0Set.
GFX_GOL_SchemeTextColor1Get This is function GFX_GOL_SchemeTextColor1Get.
GFX_GOL_SchemeTextColor1Set This is function GFX_GOL_SchemeTextColor1Set.
GFX_GOL_SchemeTextColorDisableGet This is function GFX_GOL_SchemeTextColorDisableGet.
GFX_GOL_SchemeTextColorDisableSet This is function GFX_GOL_SchemeTextColorDisableSet.
GFX_GOL_SchemeTextColorSet This is function GFX_GOL_SchemeTextColorSet.
Structures
Name Description
GFX_GOL_OBJ_SCHEME This structure specifies the style scheme components of an object.
File Name
gfx_gol_scheme.h
Company
Microchip Technology Inc.
5.2.2.8.25 gfx_gol_scroll_bar.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the Slider Object.
Enumerations
Name Description
GFX_GOL_SCROLLBAR_STATE Object States Definition:
Functions
Name Description
GFX_GOL_ScrollBarActionGet This function evaluates the message from a user if the message will
affect the object or not.
GFX_GOL_ScrollBarActionSet This function performs the state change of the object based on the
translated action.
GFX_GOL_ScrollBarCreate This function creates a GFX_GOL_SCROLLBAR object with the
parameters given. It automatically attaches the new object into a global
linked list of objects and returns the address of the object.
GFX_GOL_ScrollBarDraw This function renders the object on the screen based on the current state
of the object.
GFX_GOL_ScrollBarPageGet This function returns the page size of the object.
GFX_GOL_ScrollBarPageSet This function sets the page size of the object.
GFX_GOL_ScrollBarPositionDecrement This function decrements the scroll bar position by the delta change
(page) value set.
GFX_GOL_ScrollBarPositionGet This function returns the current position of the scroll bar thumb.
GFX_GOL_ScrollBarPositionIncrement This function increments the scroll bar position by the delta change
(page) value set.
GFX_GOL_ScrollBarPositionSet This function sets the position of the scroll bar thumb.
GFX_GOL_ScrollBarRangeGet This function returns the range of the thumb of the scroll bar.
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GFX_GOL_ScrollBarRangeSet This function sets the range of the thumb of the scroll bar.
Structures
Name Description
GFX_GOL_SCROLLBAR Defines the parameters required for a slider/scrollbar Object. Depending on the
GFX_GOL_SCROLLBAR_SLIDER_MODE_STATE state bit slider or scrollbar
mode is set. If GFX_GOL_SCROLLBAR_SLIDER_MODE_STATE is set, mode is
slider; if not set mode is scroll bar. For scrollbar mode, focus rectangle is not
drawn.
File Name
gfx_gol_scroll_bar.h
Company
Microchip Technology Inc.
5.2.2.8.26 gfx_gol_static_text.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the Static Text Object.
Enumerations
Name Description
GFX_GOL_STATICTEXT_STATE Object States Definition:
Functions
Name Description
GFX_GOL_StaticTextActionGet This function sets the text alignment of the text string used by the object.
GFX_GOL_StaticTextAlignmentGet This function returns the text alignment of the text string used by the object.
GFX_GOL_StaticTextAlignmentSet This function sets the text alignment of the text string used by the object.
GFX_GOL_StaticTextCreate This function creates a GFX_GOL_STATICTEXT object with the parameters
given. It automatically attaches the new object into a global linked list of
objects and returns the address of the object.
GFX_GOL_StaticTextDraw This function renders the object on the screen based on the current state of
the object.
GFX_GOL_StaticTextGet This function returns the address of the current text string used by the object.
GFX_GOL_StaticTextSet This function sets the address of the current text string used by the object.
Structures
Name Description
GFX_GOL_STATICTEXT Defines the parameters required for a Static Text Object.
File Name
gfx_gol_static_text.h
Company
Microchip Technology Inc.
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5.2.2.8.27 gfx_gol_text_entry.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the Text Entry Object.
Enumerations
Name Description
GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE Optional COMMANDS assigned to keys
GFX_GOL_TEXTENTRY_STATE Object States Definition:
Functions
Name Description
GFX_GOL_TextEntryActionGet This function evaluates the message from a user if the message will
affect the object or not.
GFX_GOL_TextEntryActionSet This function performs the state change of the object based on the
translated action.
GFX_GOL_TextEntryBufferClear This function will clear the data in the display.
GFX_GOL_TextEntryBufferGet This function returns the buffer used to display text.
GFX_GOL_TextEntryBufferSet This function sets the buffer used to display text.
GFX_GOL_TextEntryCharAdd This function will insert a character to the end of the buffer.
GFX_GOL_TextEntryCreate This function creates a GFX_GOL_TEXTENTRY object with the
parameters given. It automatically attaches the new object into a
global linked list of objects and returns the address of the object.
GFX_GOL_TextEntryDraw This function renders the object on the screen based on the current
state of the object.
GFX_GOL_TextEntryKeyCommandGet This function will return the currently assigned command to the key
with the given index.
GFX_GOL_TextEntryKeyCommandSet This function will assign a command to a key with the given index.
GFX_GOL_TextEntryKeyIsPressed This function will test if a key given by its index in the object is
pressed.
GFX_GOL_TextEntryKeyListCreate This function will create the list of KEYMEMBERS that holds the
information on each key.
GFX_GOL_TextEntryKeyMemberListDelete This function will delete the KEYMEMBER list assigned to the object.
GFX_GOL_TextEntryKeyTextSet This function will set the text assigned to a key with the given index.
GFX_GOL_TextEntryLastCharDelete This function will remove the last character of the buffer and replace it
with a string terminator.
GFX_GOL_TextEntrySpaceCharAdd This function will insert a space character to the end of the buffer.
Macros
Name Description
TE_ROUNDEDBUTTON_RADIUS Optional settigns Set this parameter in the GraphicsConfig.h
Structures
Name Description
GFX_GOL_TEXTENTRY Defines the parameters required for a TextEntry Object.
KEYMEMBER Defines the parameters and the strings assigned for each key.
File Name
gfx_gol_text_entry.h
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Company
Microchip Technology Inc.
5.2.2.8.28 gfx_gol_window.h
Module for Microchip Graphics Library - Graphic Object Layer
Refer to Microchip Graphics Library for complete documentation of the Window Object.
Enumerations
Name Description
GFX_GOL_WINDOW_STATE Object States Definition:
Functions
Name Description
GFX_GOL_WindowActionGet This function evaluates the message from a user if the message will affect
the object or not.
GFX_GOL_WindowCreate This function creates a GFX_GOL_WINDOW object with the parameters
given. It automatically attaches the new object into a global linked list of
objects and returns the address of the object.
GFX_GOL_WindowDraw This function renders the object on the screen based on the current state of
the object.
GFX_GOL_WindowTextAlignmentGet This function returns the text alignment of the text string used by the object.
GFX_GOL_WindowTextAlignmentSet This function sets the text alignment of the text string used by the object.
GFX_GOL_WindowTextSet This function sets the address of the current text string used by the object.
Macros
Name Description
GFX_GOL_WindowImageGet This function gets the image used.
GFX_GOL_WindowTextGet This function returns the address of the current text string used by the object.
Structures
Name Description
GFX_GOL_WINDOW The structure contains data for the window
Company
Microchip Technology Inc.
FileName: gfx_gol_window.h
5.2.2.8.29 gfx_imageDecoder.h
This is file gfx_imageDecoder.h.
Functions
Name Description
ImageDecoderInit This function initializes the global variables to 0 and then initializes the driver. This
must be called once before any other function of the library is called
ImageDecodeTask This function completes one small part of the image decode function
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ImageLoopCallbackRegister This function registers the loop callback function so that the decoder calls this
function in every decoding loop. This can be used by the application program to do
maintainance activities such as fetching data, updating the display, etc...
IMG_vSetboundaries
Macros
Name Description
ImageAbort This function sets the Image Decoder's Abort flag so that decoding aborts in the
next decoding loop.
ImageFullScreenDecode This function decodes and displays the image on the screen in fullscreen mode
with center aligned and downscaled if required
IMG_ALIGN_CENTER Flags
IMG_DECODE_ABORTED This is macro IMG_DECODE_ABORTED.
IMG_DOWN_SCALE This is macro IMG_DOWN_SCALE.
IMG_FCLOSE This is macro IMG_FCLOSE.
IMG_FEOF This is macro IMG_FEOF.
IMG_FILE This is macro IMG_FILE.
IMG_FOPEN added by Paolo 9/10/08 for MultiApp Demo
IMG_FREAD This is macro IMG_FREAD.
IMG_FSEEK This is macro IMG_FSEEK.
IMG_FTELL This is macro IMG_FTELL.
IMG_SCREEN_HEIGHT This is macro IMG_SCREEN_HEIGHT.
IMG_SCREEN_WIDTH The individual image decoders use these defines instead of directly using those
provided in the Display driver file
IMG_vCheckAndAbort This is macro IMG_vCheckAndAbort.
IMG_vLoopCallback This is macro IMG_vLoopCallback.
IMG_vPutPixel This is macro IMG_vPutPixel.
IMG_vSetColor This is macro IMG_vSetColor.
Types
Name Description
FileFeof This is type FileFeof.
FileRead Typedefs of the used File System APIs
FileSeek This is type FileSeek.
FileTell This is type FileTell.
IMG_FILE_FORMAT IMG_ImageFileFormat specifies all the supported image file formats
IMG_FILE_SYSTEM_API IMG_FileSystemAPI holds function pointers to the used File System APIs
IMG_LOOP_CALLBACK IMG_LoopCallback is a callback function which is called in every loop of the
decoding cycle so that user application can do some maintainance activities
IMG_PIXEL_OUTPUT IMG_PixelOutput is a callback function which receives the color information of the
output pixel
IMG_PIXEL_XY_RGB_888 IMG_PixelRgb holds the RGB information of a pixel in BYTES
Variables
Name Description
IMG_bAlignCenter This is variable IMG_bAlignCenter.
IMG_bDownScalingFactor This is variable IMG_bDownScalingFactor.
IMG_blAbortImageDecoding The global variables which define the image position and size
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IMG_pCurrentFile This is variable IMG_pCurrentFile.
IMG_pFileAPIs This is variable IMG_pFileAPIs.
IMG_PixelXYColor This is variable IMG_PixelXYColor.
IMG_pLoopCallbackFn This is variable IMG_pLoopCallbackFn.
IMG_pPixelOutput This is variable IMG_pPixelOutput.
IMG_wHeight This is variable IMG_wHeight.
IMG_wImageHeight This is variable IMG_wImageHeight.
IMG_wImageWidth This is variable IMG_wImageWidth.
IMG_wStartX This is variable IMG_wStartX.
IMG_wStartY This is variable IMG_wStartY.
IMG_wWidth This is variable IMG_wWidth.
5.2.2.8.30 gfx_palette.h
• Module for Microchip Graphics Library
• Palette Support
***************************************************************************
• FileName: gfx_palette.h
• Dependencies: Graphics.h
• Processor: PIC24, PIC32
• Compiler: MPLAB C30, MPLAB C32
• Linker: MPLAB LINK30, MPLAB LINK32
• Company: Microchip Technology Incorporated
*
• Software License Agreement
*
• Copyright © 2008 Microchip Technology Inc. All rights reserved.
• Microchip licenses to you the right to use, modify, copy and distribute
• Software only when embedded on a Microchip microcontroller or digital
• signal controller, which is integrated into your product or third party
• product (pursuant to the sublicense terms in the accompanying license
• agreement).
*
• You should refer to the license agreement accompanying this Software
• for additional information regarding your rights and obligations.
*
• SOFTWARE AND DOCUMENTATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY
• KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY
• OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
• PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
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• OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION,
• BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
• DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL,
• INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
• COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY
• CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
• OR OTHER SIMILAR COSTS.
*
• Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
• 11/06/09 Initial Release
• 08/20/10 Modified PALETTE_EXTERNAL to be of type GFX_EXTDATA.
• 03/20/12 Modified PALETTE_ENTRY structure to have packed attribute.
Functions
Name Description
ClearPaletteChangeError Clears the Palette change error status
DisablePalette Disables the Palette mode.
EnablePalette Enables the Palette mode.
GetPaletteChangeError Returns the Palette change error status
IsPaletteEnabled Returns if the Palette mode is enabled or not.
PaletteInit Initializes the color look up table (CLUT).
RequestPaletteChange Loads the palettes from the flash during vertical blanking period if possible,
otherwise loads immediately.
SetPalette Programs a block of palette entries starting from startEntry and until startEntry +
length from the flash immediately.
SetPaletteBpp Sets the color look up table (CLUT) number of valid entries.
SetPaletteFlash Loads the palettes from the flash immediately.
Macros
Name Description
RequestEntirePaletteChange Macro: RequestEntirePaletteChange(pPalette)
Loads all the palette entries from the flash during vertical blanking period if
possible, otherwise loads immediately.
SetEntirePalette Macro: SetEntirePalette(pPalette)
Programs the whole 256 entry palette with new color values from flash.
Structures
Name Description
PALETTE_FLASH Structure for the palette stored in FLASH memory.
PALETTE_HEADER Structure for the palette header.
Types
Name Description
PALETTE_EXTERNAL Structure for palette stored in EXTERNAL memory space. (example: External SPI
or parallel Flash, EDS_EPMP)
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Unions
Name Description
5.2.2.8.31 gfx_primitive.h
Module for Microchip Graphics Library - Graphic Primitive Layer
This module implements the primitive rendering routines of the Microchip Graphics Library. The routines are independent of the
Display Driver Layer and should be compatible with any Display Driver that is compliant with the requirements of the Display
Driver Layer of the Graphics Library.
Enumerations
Name Description
GFX_TRIG_FUNCTION_TYPE DOM-IGNORE-START
Functions
Name Description
DrawArc This renders an arc with from startAngle to endAngle with the
thickness of r2-r1. The function returns 1 when the arc is rendered
successfuly and returns a 0 when it is not yet finished. The next call
to the function will continue the rendering.
GFX_AlphaBlendingValueGet This function returns the current alpha value set for alpha blending
rendering.
GFX_AlphaBlendingValueSet This function sets the alpha value for alpha blending rendering.
GFX_BackgroundColorGet This function returns the color used in the current background.
GFX_BackgroundImageGet This function returns the image used in the current background.
GFX_BackgroundImageLeftGet This function returns the horizontal starting position of the current
background.
GFX_BackgroundImageTopGet This function returns the vertical starting position of the current
background.
GFX_BackgroundSet This function sets the background information.
GFX_BackgroundTypeGet This function returns the type of the current background.
GFX_BackgroundTypeSet This function sets the background type.
GFX_BarAlphaDraw This function renders a alpha blended bar shape using the currently
set fill style and color.
GFX_BarDraw This function renders a bar shape using the currently set fill style and
color.
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GFX_BarGradientDraw This renders a bar onto the screen, but instead of one color, a
gradient is drawn depending on the direction
(GFX_GRADIENT_TYPE), length, and colors chosen. This function
is a blocking call.
GFX_BevelDraw This is function GFX_BevelDraw.
GFX_BevelDrawTypeGet
GFX_BevelDrawTypeSet
GFX_BevelGradientDraw This renders a filled bevel with gradient color on the fill. It works the
same as the fillbevel function, except a gradient out of color1 and
color2 is drawn depending on the direction
(GFX_GRADIENT_TYPE). This function is a blocking call.
GFX_CircleDraw This function renders a circular shape using the currently set line
style and color.
GFX_CircleFillDraw This function renders a filled circle shape using the currently set fill
style and colors.
GFX_ColorGet This function returns the color currently set to render primitive
shapes and text.
GFX_ColorSet This function sets the color to be used in rendering primitive shapes
and text.
GFX_DoubleBufferAreaGet
GFX_DoubleBufferAreaMark
GFX_DoubleBufferDisable
GFX_DoubleBufferEnable
GFX_DoubleBufferStatusGet
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GFX_DoubleBufferSyncAllStatusClear
GFX_DoubleBufferSyncAllStatusGet
GFX_DoubleBufferSyncAllStatusSet
GFX_DoubleBufferSyncAreaCountGet
GFX_DoubleBufferSyncAreaCountSet
GFX_DoubleBufferSynchronize
GFX_DoubleBufferSynchronizeCancel
GFX_DoubleBufferSynchronizeRequest
GFX_DoubleBufferSynchronizeSet
GFX_DoubleBufferSynchronizeStatusGet
GFX_DrawBufferGet
GFX_DrawBufferSelect
GFX_DrawBufferSet
GFX_DRV_FontSet This is function GFX_DRV_FontSet.
GFX_DRV_TextStringWidthGet This is function GFX_DRV_TextStringWidthGet.
GFX_ExternalCharInfoGet This is function GFX_ExternalCharInfoGet.
GFX_ExternalResourceCallback This function must be implemented in the application. The library will
call this function each time when the external memory data will be
required. The application must copy requested uint8_ts quantity into
the buffer provided. Data start address in external memory is a sum
of the address in GFX_EXTDATA structure and offset.
GFX_FillStyleGet Return the fill style used when rendering filled shapes.
GFX_FillStyleSet Set the fill style to be used when rendering filled shapes.
GFX_FlashCharInfoGet This is function GFX_FlashCharInfoGet.
GFX_FontAntiAliasGet This function returns the current font font anti-aliasing mode.
GFX_FontAntiAliasSet This function sets the font anti-aliasing mode.
GFX_FontGet This function returns the current font used when rendering strings
and characters.
GFX_FontSet This function sets the current font used when rendering strings and
characters.
GFX_FrameBufferGet
GFX_FrameBufferSelect
GFX_GradientColorSet Sets the gradient fill start and end color.
GFX_GradientEndColorGet Return the gradient end color when rendering gradient filled shapes.
GFX_GradientStartColorGet Return the gradient start color when rendering gradient filled shapes.
GFX_ImageDraw This function renders an image to the frame buffer.
GFX_ImageHeaderGet This function fills the given bitmap header with the image's header
information.
GFX_ImageHeightGet This function returns the height of the given image.
GFX_ImageOffsetAddressGet This is function GFX_ImageOffsetAddressGet.
GFX_ImagePartialDraw This function renders a portion of an image to the frame buffer.
GFX_ImageWidthGet This function returns the width of the given image.
GFX_Initialize Initialize the Graphics Library.
GFX_LineDraw This function renders a line from x1,y1 to x2,y2 using the currently
set line style (see GFX_LineStyleSet()).
GFX_LinePositionRelativeSet This function sets the line cursor to a new position relative to the
current position.
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GFX_LinePositionSet This function sets the line cursor to a new position.
GFX_LinePositionXGet This function returns the current x position of the line cursor.
GFX_LinePositionYGet This function returns the current y position of the line cursor.
GFX_LineStyleGet Return the line style used when rendering lines.
GFX_LineStyleSet Set the line style to be used when rendering lines.
GFX_LineToDraw This function renders a line from current line cursor position (x,y) to
(x2,y2) using the currently set line style (see GFX_LineStyleSet()).
GFX_LineToRelativeDraw This function renders a line from current line cursor position (x,y) to
(x+dX,y+dY) using the currently set line style (see
GFX_LineStyleSet()).
GFX_PolygonDraw This function renders a polygon using the currently set line style (see
GFX_LineStyleSet()) and color (see GFX_ColorSet()).
GFX_Primitive_Initialize This is function GFX_Primitive_Initialize.
GFX_RectangleDraw This function renders a rectangular shape using the currently set line
style and color.
GFX_RectangleFillDraw This function renders a filled rectangular shape using the currently
set fill style and colors.
GFX_RectangleRoundDraw This function renders a rounded corner rectangular shape using the
currently set line style and color.
GFX_RectangleRoundFillDraw This function renders a filled rectangular shape with round corners
using the currently set fill style and colors.
GFX_RenderingBufferGet This function is an internal function and should not be called by the
application.
GFX_RenderToDisplayBufferDisable This is function GFX_RenderToDisplayBufferDisable.
GFX_RenderToDisplayBufferDisableFlagGet This is function GFX_RenderToDisplayBufferDisableFlagGet.
GFX_RenderToDisplayBufferEnable This is function GFX_RenderToDisplayBufferEnable.
GFX_ScreenClear Clears the screen to the currently set color (GFX_ColorSet()).
GFX_SineCosineGet This is function GFX_SineCosineGet.
GFX_SolidLineDraw This is function GFX_SolidLineDraw.
GFX_StyledLineDraw This is function GFX_StyledLineDraw.
GFX_TextAreaBottomGet This is function GFX_TextAreaBottomGet.
GFX_TextAreaBottomSet This is function GFX_TextAreaBottomSet.
GFX_TextAreaLeftGet This is function GFX_TextAreaLeftGet.
GFX_TextAreaLeftSet This is function GFX_TextAreaLeftSet.
GFX_TextAreaRightGet This is function GFX_TextAreaRightGet.
GFX_TextAreaRightSet This is function GFX_TextAreaRightSet.
GFX_TextAreaTopGet This is function GFX_TextAreaTopGet.
GFX_TextAreaTopSet This is function GFX_TextAreaTopSet.
GFX_TextCharDraw This function renders the given character using the currently set
color using the currently set font.
GFX_TextCursorPositionSet This function sets the text cursor to a new position.
GFX_TextCursorPositionXGet This function returns the current x position of the text cursor.
GFX_TextCursorPositionYGet This function returns the current y position of the text cursor.
GFX_TextStringBoxDraw This function renders the given string using the currently set color
and font into a rectangular area.
GFX_TextStringDraw This function renders the given string of character using the currently
set color using the currently set font.
GFX_TextStringHeightGet This function returns the height of the given font.
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GFX_TextStringWidthGet This function returns the width of the given string using the given font.
GFX_ThickBevelDraw This is function GFX_ThickBevelDraw.
GFX_TransparentColorDisable This function disables the transparent color feature used in
GFX_ImageDraw() and GFX_ImagePartialDraw() functions.
GFX_TransparentColorEnable This function sets the transparent color used in GFX_ImageDraw()
functions and enables the transparent color feature.
GFX_TransparentColorGet This returns the current transparent color set for the transparent
color feature used in GFX_ImageDraw() and
GFX_ImagePartialDraw() functions.
GFX_TransparentColorStatusGet This returns the current state of the transparent color feature used in
GFX_ImageDraw() and GFX_ImagePartialDraw() functions.
GFXCirclePointGet This is function GFXCirclePointGet.
Macros
Name Description
GFX_CosineGet This is macro GFX_CosineGet.
GFX_SineGet This is macro GFX_SineGet.
ONEP25 1.25 * 2^16
SIN45 sin(45) * 2^16)
File Name
gfx_primitive.h
Company
Microchip Technology Inc.
5.2.2.8.32 gfx_primitive_local.h
Clock System Service Interface Definition
None.
Enumerations
Name Description
FONT_ORIENTATION Types of orientation
IMAGE_STRETCH Types of image stretching
LAYER_ACTIONS
Functions
Name Description
GFX_AlphaBlendWindow
GFX_DoubleBufferVisualPageUpdate
GFX_Layer
GFX_PageSet
Macros
Name Description
CopyPageWindow
GFX_ActivePageGet Returns the active page.
GFX_AlphaParamsSet
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GFX_BUFFER1 This is macro GFX_BUFFER1.
GFX_BUFFER2 This is macro GFX_BUFFER2.
GFX_FontAlignmentSet Sets font orientation vertical or horizontal.
GFX_GradientTypeSet This is macro GFX_GradientTypeSet.
GFX_ImageStretchSet This is macro GFX_ImageStretchSet.
GFX_MaxXGet
GFX_MaxYGet
GFX_PixelPut This is macro GFX_PixelPut.
GFX_PixelsPut This function renders one line of pixels of a given length
GFX_PrevAlphaColorGet
GFX_PrevAlphaColorSet
GFX_SetFontOrientation Sets font orientation vertical or horizontal.
GFX_VisualPageGet Returns the visual page.
Structures
Name Description
GFX_FONT_CURRENT Internal structure for currently set font.
GFX_GRADIENT_STYLE This structure is used to describe the gradient style.
GFX_Primitive_DATA
GFX_TRANSITION_PARAMS
PUTIMAGE_PARAM Partial image area to render.
Variables
Name Description
DisplayUpdatePending This is variable DisplayUpdatePending.
doubleBuffEnabled This is variable doubleBuffEnabled.
GFX_Primitive_instance structure to store the primitive driver structures
primitiveTaskImage This is variable primitiveTaskImage.
File Name
gfx_primitive.h
Company
Microchip Technology Inc.
5.2.2.8.33 gfx_transitions.h
• Module for Microchip Graphics Library
• Primitive Layer
• Transition
***************************************************************************
• FileName: Transitions.h
• Dependencies: None
• Processor: PIC24F, PIC24H, dsPIC, PIC32
• Compiler: MPLAB C30, MPLAB C32
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• Linker: MPLAB LINK30, MPLAB LINK32
• Company: Microchip Technology Incorporated
*
• Software License Agreement
*
• Copyright © 2010 Microchip Technology Inc. All rights reserved.
• Microchip licenses to you the right to use, modify, copy and distribute
• Software only when embedded on a Microchip microcontroller or digital
• signal controller, which is integrated into your product or third party
• product (pursuant to the sublicense terms in the accompanying license
• agreement).
*
• You should refer to the license agreement accompanying this Software
• for additional information regarding your rights and obligations.
*
• SOFTWARE AND DOCUMENTATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY
• KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY
• OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
• PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
• OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION,
• BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
• DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL,
• INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
• COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY
• CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
• OR OTHER SIMILAR COSTS.
*
• Author Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
• Microchip 24/12/2010 Initial version
Enumerations
Name Description
GFX_TRANSITION_DIRECTION Direction enumeration to determine the direction of the selected
GFX_TRANSITION_TYPE.
GFX_TRANSITION_TYPE Transition type enumeration to determine the type of the transition. Each type
will require specific parameters when setting up the transition operation
(GFXSetupTransition() or GFXTransition()).
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Functions
Name Description
GFX_SetTransitionParameters This sets up the transition effect using the GFX_TRANSITION_TYPE and the
given parameters. The actual transition execution will occur when
GFXExecutePendingTransition() is called. When DOUBLE_BUFFERING is
enabled, GFXExecutePendingTransition() is executed after the current screen is
fully rendered.
GFX_Transition This immediately executes the transition effect using the
GFX_TRANSITION_TYPE and the given parameters.
5.2.2.8.34 gfx_types_font.h
Graphics Resource Types Header for Microchip Graphics Library
This header defines the different structures used for fonts resources in the Microchip Graphics Library.
Macros
Name Description
GFX_FONT_SPACE Font space section. The fonts can be located in psv (constant) or program space
in PIC24/dsPIC MCUs. This define allows for switching of the pointer type used to
access the font structure in memory See: GraphicsConfig.h for the application
define.
GFX_TYPES_FONTS_H This is macro GFX_TYPES_FONTS_H.
GFX_UXCHAR This is macro GFX_UXCHAR.
GFX_XCHAR Configuration for the text character size.
Structures
Name Description
GFX_FONT_GLYPH_ENTRY Structures describing the glyph entry.
GFX_FONT_GLYPH_ENTRY_EXTENDED This is type GFX_FONT_GLYPH_ENTRY_EXTENDED.
GFX_FONT_HEADER Structure describing the font header.
GFX_FONT_OUTCHAR Structure for character information when rendering the character.
File Name
gfx_font_types.h
Company
Microchip Technology Inc.
5.2.2.8.35 gfx_types_image.h
Graphics Resource Types Header for Microchip Graphics Library
This header defines the different structures used for images resources in the Microchip Graphics Library.
Macros
Name Description
GFX_TYPES_IMAGE_H This is macro GFX_TYPES_IMAGE_H.
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Structures
Name Description
GFX_MCHP_BITMAP_HEADER Structure describing the bitmap header.
Types
Name Description
int16_gfx_image_prog This is type int16_gfx_image_prog.
int16_prog This is type int16_prog.
int16_prog_pack This is type int16_prog_pack.
int32_gfx_image_prog This is type int32_gfx_image_prog.
int32_prog This is type int32_prog.
int32_prog_pack This is type int32_prog_pack.
int8_gfx_image_prog This is type int8_gfx_image_prog.
int8_prog This is type int8_prog.
int8_prog_pack This is type int8_prog_pack.
uint16_gfx_image_prog This is type uint16_gfx_image_prog.
uint16_prog This is type uint16_prog.
uint16_prog_pack This is type uint16_prog_pack.
uint32_gfx_image_prog This is type uint32_gfx_image_prog.
uint32_prog This is type uint32_prog.
uint32_prog_pack This is type uint32_prog_pack.
uint8_gfx_image_prog GFX Image data Types
uint8_prog General program space data types
uint8_prog_pack This is type uint8_prog_pack.
File Name
gfx_image_types.h
Company
Microchip Technology Inc.
5.2.2.8.36 gfx_types_macros.h
Module for Microchip Graphics Library
This module defines the data types used in the Microchip Graphics Library for use of Primitive and Driver Layers.
Enumerations
Name Description
GFX_ALIGNMENT Defines the types of text alignment. The text alignment is used in
GFX_TextStringBoxDraw().
GFX_BACKGROUND_TYPE Defines the types of background information. Knowing the background
information allows easier refresh of an area on the display buffer.
GFX_BEVEL_RENDER_TYPE Bevel shapes can be rendered in full or half size. The following types defines the
full, top and bottom halves.
GFX_FEATURE_STATUS Defines the states of a Graphics Library feature that can nbe enabled/disabled at
run time.
GFX_FILL_STYLE Defines the types of fill styles.
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GFX_FONT_ANTIALIAS_TYPE Transparency type when rendering characters with anti-aliasing.
GFX_LINE_STYLE Defines the types of line styles.
GFX_STATUS Status types for rendering.
GFX_STATUS_BIT Bit masks for additional status information.
Macros
Name Description
ConvertColor25 This is macro ConvertColor25.
ConvertColor50 75, 50, 25 percentage color conversion macros. Used in converting colors to
these percentages when performing alpha blending of colors using software
alpha blending operation.
ConvertColor75 This is macro ConvertColor75.
GFX_MAX_INVALIDATE_AREAS This is macro GFX_MAX_INVALIDATE_AREAS.
GFX_RGBConvert Macros: GFX_RGBConvert(red, green, blue)
This macro converts the color data to the selected COLOR_DEPTH. This
macro is only valid when COLOR_DEPTH is 8, 16, or 24.
Structures
Name Description
5.2.2.8.37 gfx_types_palette.h
FileName: gfx_palette_types.h Dependencies: See Includes Section Processor: PIC24, PIC32 Compiler: XC16/XC32 Linker:
XC16/XC32
Macros
Name Description
GFX_TYPES_PALETTE_H This is macro GFX_TYPES_PALETTE_H.
Unions
Name Description
5.2.2.8.38 gfx_types_resource.h
Graphics Resource Types Header for Microchip Graphics Library
This header defines the different structures used for the Graphics Resources used in the Graphics Library. This also contains
helpful macros as well as data types used.
Enumerations
Name Description
GFX_RESOURCE Memory type enumeration to determine the source of data. Used in interpreting
images, fonts and palette from different memory sources.
Macros
Name Description
GFX_COMP_MASK This is macro GFX_COMP_MASK.
GFX_MEM_MASK This is macro GFX_MEM_MASK.
GFX_TYPE_MASK This is macro GFX_TYPE_MASK.
GFX_TYPES_RESOURCE_H This is macro GFX_TYPES_RESOURCE_H.
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MCHP_BITMAP_NORMAL no compression, palette is present for color depth = 8, 4 and 1 BPP
MCHP_BITMAP_PALETTE_STR palette is provided as a separate object (see PALETTE_HEADER) for color
depth = 8, 4, and 1 BPP, ID to the palette is embedded in the bitmap.
Structures
Name Description
GFX_RESOURCE_BINARY Structure for Graphics Resource - binary data.
GFX_RESOURCE_FONT Structure for Graphics Resource - Fonts.
GFX_RESOURCE_HDR Structure for Graphics Resource Header. This is the common header for all
Graphics Resources.
GFX_RESOURCE_IMAGE Structure for Graphics Resource - image.
GFX_RESOURCE_PALETTE Structure for Graphics Resource - Palette.
File Name
gfx_resource_types.h
Company
Microchip Technology Inc.
5.2.3 Graphics Primitive Library
5.2.3.1 Introduction
Graphics Primitive Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Graphics Primitive Library that is available on the Microchip family of
microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the library without the
necessity of interacting directly with a graphics controller, there by hiding differences from one graphics controller variant to
another.
Description
This module is part of a larger Graphics Library. The Primitive Layer is used to send rendered shape data to the appropriate
graphics controller driver. The primitive layer is also a scheduler to make sure that shapes are rendered in the proper order. This
helps ensure a widget appears on the screen correctly. Shapes (Bars, Lines, Bevels, etc.) also include text and images.
5.2.3.2 Release Notes
MPLAB Harmony Version: v0.70b Graphics Primitive Library Version : 4.00b Release Date: 18Nov2013
Contents:
This release consists of the Graphics Primitive Layer.
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Graphic Layer Description
Primitive The primitive layer sends rendered shape and image data to the appropriate graphics controller driver
New This Release:
A summary of the new features is as follows:
• Renamed Primitive API functions
• Remove instance argument from APIs
Feature Description Comments
Multi-Display support Only one LCD display is supported in this release. Support available in upcoming release.
Known Issues:
• No multi-display support
Feature Category Description Work-around
Multi-Display support Driver Only one LCD display is supported in this release. Support available in upcoming release.
5.2.3.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.2.3.4 Using the Library
This topic describes the basic architecture of the Graphics Primitive Library and provides information and examples on how to
use it.
Interface Header File: gfx_primitive.h
The interface to the Graphics Primitive library is defined in the "primitive.h" header file. This file is included by the "gfx.h" file. Any
C language source (.c) file that uses the Graphics Primitive library should include "primitive.h".
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5.2.3.4.1 Abstraction Model
The Primitive Layer provide a set of low level drawing functions. These functions include drawing lines, rectangles, circles, text,
and bitmap images.
5.2.3.4.2 Library Overview
Refer to the section Driver Overview for how the driver operates in a system.
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Graphics module.
Library Interface Section Description
Setup and Management Functions Contains the APIs for setting up primitive rendering functions and managing
the primitive layer
Text Functions Contains the APIs for rendering text
Shape Functions Contains the APIs for shapes that can be rendered
Image Functions Contains the APIs for rendering images
Color Functions Contains the APIs for setting/getting colors
Double Buffering Functions Contains the APIs for setting double buffering
5.2.3.4.3 How the Library Works
The primitive layer is defined as the mediator between the graphics object layer and the graphics controller driver layer. Once the
primitive layer is initialized the application just has to make calls to which specific primitive it is rendering. This layers serves
other purposes:
• Schedules primitive tasks to ensure proper primitive rendering. This feature makes it possible to know that when an object is
called to be drawn on a screen before another object that the order of these calls will be kept intact. This is important when
using features where the image on the LCD matters before making the function call.
• In the case of multiple graphics controller drivers, it organizes which driver to make the primitive update to.
Below is a flow chart showing how the primitive layer works in conjunction with the driver layer and the object layer.
5.2.3.4.3.1 Core Functionality
The primitive layer consists of a command based circular buffer. Primitives are scheduled in the buffer and the commands are
serviced each time primitivetasks() function is called.
Description
The library relies on a graphics controller driver to render images to an LCD panel. Below shows how the primitive layer files
interact with the driver layer files.
5.2.3.4.4 Using Primitive Rendering Functions
Basic rendering functions such as LineDraw(), BarDraw(), CircleDraw() etc are referred to as functions in the Graphics Primitive
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Layer. These functions can also be implemented in the device driver layer if the display device supports hardware acceleration of
the function. Applications that directly calls these functions can take advantage of the hardware accelerated primitives. How
these functions are used will depend on the configuration.
Description
All primitive rendering functions returns a handle to their location in the queue.
// all primitives are non-blocking calls
while(GFX_PRIM_LineDraw(instance,a,b) == NULL);
while(GFX_PRIM_BarDraw(instance,c,d,e,f) == NULL);
while(GFX_PRIM_BarFill(instance,c+2, d+2, e-2, f-2) == NULL);
If the while check is not in place, it possible that the only primitive that you will see in the screen is the GFX_PRIM_LineDraw().
For case 2, one can also be creative in the application code and implement some form of non-blocking scheme and make use of
the time while waiting for the primitives to render.
Another example for case 2:
uint16_t DrawMyFigure(instance, a, b, c, d, e, f)
{
typedef enum {
DRAW_LINE,
DRAW_RECT,
DRAW_BAR,
} DRAW_MYFIGURE_STATES;
static DRAW_MYFIGURE_STATES state = DRAW_LINE;
switch(state){
case DRAW_LINE:
if (GFX_PRIM_LineDraw(instance, a, b) == NULL)
return 0;
state = DRAW_RECT;
case DRAW_RECT:
if(GFX_PRIM_BarDraw(instance,c,d,e,f) == NULL)
return 0;
state = DRAW_BAR;
case DRAW_BAR:
if(GFX_PRIM_BarFill(instance, c+2, d+2, e-2, f-2) == NULL);
return 0;
state = DRAW_LINE;
return 1;
}
}
This non-blocking code can be used in the application and the application can do other tasks whenever DrawMyFigure() returns
0. Application should call DrawMyFigure() again until it return a 1 signifying that the Line, Rectangle and GFX_PRIM_BarDraw
were drawn successfully.
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5.2.3.4.4.1 Arcs
5.2.3.4.4.2 Gradients
Below is an image that helps describe the GFX_PRIM_BarGradient() function in more detail.
Below is an image that helps describe the GFX_PRIM_BevelGradient() function in more detail.
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5.2.3.4.4.3 Bevels
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5.2.3.4.4.4 Alpha Blending
This section helps describe how alpha blending works in the primitive layer.
Description
Alpha-Blend support are two levels. USE_ALPHABLEND_LITE and USE_ALPHA_BLEND.
Alpha Blend Lite is a "desructive" alpha blend where the blending happens in one frame or window. Once the colors are blending
the original color data in the visual page is lost. This method only requires one frame and GetPixel type functionality to work.
The other Alpha Blending uses blocks of pixels in the memory called Windows. A window can be any rectangular area in a
display buffer. The display buffer is also considered as a page. For a QVGA display buffer a page would be 320x240 pixels. A
window is a certain width and height contained inside a page.
Alpha blending equation:
OutPut Window = Foreground Window * (Alpha) + Background Window * (1-Alpha)
when done in software requires a lot of CPU bandwith. Epson Controller implements alpha blending in hardware which offloads
the CPU.
The Display Driver Layer of the Graphics Library utilizes the Epson Controller alpha blending through the AlphaBlendWindow()
function. Three windows are specified with equal widths and heights. An alpha parameter is passed to define the level of alpha
blending. The logical flow of the operation is shown below:
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An icon image with a given width (w) and height (h) is needed to be alpha blended into the display buffer.
• Buffer A is allocated in memory and its location set by foregroundWindowAddr
• Buffer B is allocated in memory and its location set by backgroundWindowAddr and
• Buffer C is allocated in memory and its location set by destinationWindowAddr. Note that the destination window can be
located within the display buffer. Doing this removes an intermediate step after AlphaBlendWindow() call to put the result of
alpha blend in the display buffer.
The final location of the icon on the Display Buffer is used to locate the affected pixels in the Display Buffer. These affected
pixels are copied into Buffer B while Buffer A is filled up with the Icon Image. Once Buffers A and B are ready they are alpha
blended to Buffer C. Buffer C is then copied to the Display Buffer.
Note that the Icon Image has a background color of ORANGE. To have the effect of the final output Display Buffer, set the
Epson Controllers transparent color to ORANGE. This is set in the TRANSPARENTCOLOR macro defined in the Epson
S1D13517 Driver. This TRANSPARENTCOLOR macro is not to be confused with the TransparentColorEnable() function of the
Display Device Driver Level Primitives. TRANSPARENTCOLOR is set at build time. In the future release of the Epson driver, this
will be converted to use the TransparentColorEnable() function.
5.2.3.4.4.5 Images
The image support on the primitive layer can be done "partially" to achieve more functionality in where a background can be
updated more efficiently. More details are below:
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5.2.3.4.5 Defining Colors
In most cases, the application will define its own set of colors and not use the default colors that comes with the Graphics
Library. This section shows an example on how to do it.
Description
To override or define a new set of colors follow this steps:
1. Create a new color header file. The color values and data types will depend on the GFX_COLOR type used. This data type is
defined by the COLOR_DEPTH macro. See COLOR_DEPTH for details.
2. In the application code, include the created color header file ahead of the #include "Graphics/Graphics.h". When Graphics.h
includes the gfxcolors.h it will ignore color macros that has been defined already in the new color header file.
In the GOL Palette Demo, there is an example on how it is done. In that project there is a file in the application (or project
directory) named PaletteColorDefines.h. This file contains all the color definition used in the demo. The main header file of the
demo (Main.h) includes the PaletteColorDefines.h file ahead of the Graphics Library header files. Since the
PaletteColorDefines.h declared the color values, the macros redefined in gfxcolors.h will be ignored. How is this done? If you
look at the gfxcolors.h file you will notice that all colors defined have a check (for example BLACK()):
#ifndef BLACK()
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#define BLACK() 0
#endif
So if BLACK() is defined previously, the definition in gfxcolors.h will not take effect.
5.2.3.4.6 Changing the Default Font
The library comes with the default font (Gentium 18). This font can be changed in two ways.
This instructions assumes that you have performed the conversion of your raster font or True Type font into C file. For the
conversion of your raster font please see the help file of the Graphics Resource Converter utility that comes with the Graphics
Library.
There are two ways to replace the default font in the Graphics Library.
Renaming User Font to GOLFontDefault:
1. Open the generated font file (generated by the "Graphics Resource Converter" utility) and change the font structure name to
GOLFontDefault (see figure below).
2. Remove the file GOLFONTDefault.c in the project and replace it with your own font file that contains the GOLFontDefault.
3. Build and test your new font.
Replacing the GOLFontDefault with any user defined fonts
1. Open the GraphicsConfig.h file and add the following lines:
#define FONTDEFAULT yourFontName
2. In the project, add the generated font file (generated by the "Graphics Resource Converter" utility).
3. Build and test your new font.
In this method, GOL.h and GOLFontDefault.c files checks if FONTDEFAULT is defined. If it is, it skips the declaration of the
GOLFontDefault and uses the user defined font.
5.2.3.4.7 Advanced Font Features
This topic explains anti aliasing, glyphs, and advanced font features.
Description
Fonts used in the library can be configured to use anti-aliasing and extended glyph support.
Font Anti-Aliasing
Anti-aliasing is a technique used to make the edges of text appear smooth. This is useful especially with characters like 'A', 'O',
etc which has slant or curved lines. Since the pixels of the display are arranged in rectangular fashion, slant edges can't be
represented smoothly. To make them appear smooth, a pixel adjacent to the pixels is painted with an average of the foreground
and background colors as depicted in Figure 1.
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Figure 1: Font with Anti-Aliasing
Figure 2: Font with No Anti-Aliasing
When anti-aliasing is turned off, the pixels abruptly changes from background color to foreground color shown in Figure 2. To
implement anti-aliasing, adjacent pixels transitions from background to foreground color using 25% or 75% mid-color values from
background to foreground colors. This feature in fonts will require roughly twice the size of memory storage required for font
glyphs with no anti-aliasing.
Since the average of foreground and background colors needs to be calculated at runtime, the rendering of anti-aliased fonts
take more time than rendering normal fonts. To optimize the rendering speed, a macro named GFX_Font_SetAntiAliasType() is
available where anti-alias type can be set to ANTIALIAS_OPAQUE or ANTIALIAS_TRANSLUCENT.
• ANTIALIAS_OPAQUE (default after initialization of graphics) - mid colors are calculated once while rendering each character
which is ideal for rendering text over a constant background.
• ANTIALIAS_TRANSLUCENT - the mid values are calculated for every necessary pixel and this feature is useful while
rendering text over an image or on a non-constant color background.
As a result, rendering anti-aliased text takes longer with ANTIALIAS_TRANSLUCENT type than compared to
ANTIALIAS_OPAQUE type.
To use anti-aliasing, enable the compiler switch #define USE_ANTIALIASED_FONTS in the GraphicsConfig.h file and enable
the anti-alias checkbox in the Graphics Resource Converter (GRC) tool while selecting the font.
Note: Even when anti-aliasing is enabled, normal fonts can be used without the antialias effect.
Extended Glyphs
Extended glyphs are needed to render characters of certain languages which use more than one byte to represent a single
character. For example: Asian languages like Thai, Hindi, etc. In these character set, more than one glyph overlaps each other to
form a single character of that language as shown in Figure 3. To use this feature, enable the Extended Glyph checkbox in the
Graphics Resource Converter (GRC) tool while selecting the font.
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Figure 3: Example of a Character that is Formed by Two Overlapping Glyphs
Note: The fonts used with extended glyphs are normal ANSI fonts and not Unicode fonts.
5.2.3.4.8 Double Buffering
In the Microchip Graphics Library, if double-buffering is enabled, the frame buffer and draw buffer are exchanged after the
changes of all the widgets on a screen are done (i.e., the new screen appears after the whole screen is updated and not after
updating an individual widget). This feature is enabled only on the following drivers:
• Microchip Graphics Display Driver - customizable driver for RGB Glass. Currently used in PIC24FJ256DA210 device family.
• Microchip Low-Cost Controllerless (LCC) Graphics Display Driver - customizable driver for RGB Glass. Currently used for
selected PIC32MX device families.
Description
Manipulating pixels on the screen requires direct writes to the frame buffer. While these changes are being executed, the screen
is also refreshed. This means that the changes are displayed immediately as the frame buffer is being updated. This is not a
suitable scheme when the changes are slow, for example, decoding an image or having a large number of widgets on a screen.
The display may appear slow in that case. One solution to this problem is to use a double-buffering scheme supported by the
Microchip Graphics Library. In this scheme, the changes are not directly written to the frame buffer, but instead, they are written
to a separate buffer, called the ‘Draw Buffer’. After all the changes are made, the draw buffer and frame buffer are exchanged.
Now the draw buffer becomes the frame buffer, and because of all the changes drawn there, the changes appear spontaneous
to the user. Of course, there will be a delay, as all the changes have to be written to the draw buffer before displaying it. This
delay is generally more tolerable than displaying the changes slowly. After exchanging of the buffers, the latest buffer (which is
now the frame buffer) is copied to the new draw buffer in the background and then the new draw buffer is in sync with what is
being displayed. New changes are then written to the draw buffer and the cycle continues. As the double-buffering scheme uses
two buffers, the RAM requirement will double.
In the Microchip Graphics Library, if double-buffering is enabled, the frame buffer and draw buffer are exchanged after the
changes of all the widgets on a screen are done (i.e., the new screen appears after the whole screen is updated and not after
updating an individual widget).
The work flow of double-buffering is graphically explained along with tips on deciding when to use double buffering in the
APPENDIX B of the Application note AN1368: Developing Embedded Graphics Applications using PIC® Microcontrollers with
Integrated Graphics Controller.
To use double buffering in an application, follow the steps described below:
1. Enable the option USE_DOUBLE_BUFFERING in GraphicsConfig.h
2. Update GFX_DISPLAY_BUFFER_LENGTH to include both the buffers in HardwareProfile.h. Note that when using external
memory the GFX_DISPLAY_BUFFER_LENGTH must fit into the external memory size. For example in PIC24FJ256DA210
external memory can be added using EPMP. External memory mapped to the EPMP must be big enough to accommodate the
display buffers required by double buffering. See Set Up Display Interface for more information on memory requirements.
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3. Check the jumper settings to enable the required RAM address space on the development board
If Graphics Objects Layer (GOL) is used in the application, the switching of buffers is handled automatically in order to keep the
switching task transparent to the users. If double buffering is enabled in applications using only the Primitive layer, then the
switching of buffers has to be handled by the application itself as explained in the following steps.
Steps required for manually handling the switching of buffers:
1. After InitGraph() is called, call the APIs InvalidateAll() followed by UpdateDisplayNow(). The two buffers are properly setup
after these calls and from this point onwards, the drawing happens on the draw-buffer.
2. When a shape is drawn on the draw buffer, that rectangular area has to be marked as invalid by using the API
InvalidateRectangle(left, top, right, bottom). Only the invalidated rectangular areas are copied to the frame buffer in order to
reduce the copy operations thereby reducing the overall time and energy required to sync the two buffers. Hence, it is important
to invalidate the changed rectangular areas failing which the change doesn’t show up on the display.
3. Call either RequestDisplayUpdate() or UpdateDisplayNow() to sync the two buffers and as a result the changes appear on the
display. The former API exchanges the buffers during the next display blanking period on TFT LCDs causing the change to
appear smooth and immediate whereas the latter API exchanges the two buffers at the time of the API call probably causing a
slight flicker on the display. On displays which doesn’t support blanking periods (e.g. CSTN LCDs), the effect of
RequestDisplayUpdate() is same as that of UpdateDisplayNow().
Even if double buffering is enabled at compile time, it can be switched off and on at run time using APIs
SwitchOffDoubleBuffering() and SwitchOnDoubleBuffering(). Switching double buffering on/off at runtime is useful in applications
which need some screens having fast updates like waveform or animation which requires double buffering to be switched off and
some other screens where double buffering is beneficial.
Note: In applications using Graphics Objects Layer and double buffering, the double buffering is not immediately enabled after
the API GFX_OBJ_Initialize() is called in order to support hassles splash screens but is automatically enabled from the second
screen update onwards. If double buffering is needed from the first screen itself, then follow step 1 immediately after calling
GFX_OBJ_Initialize().
5.2.3.4.9 Transitions
This section describes screen transition effect when changing screens.
Description
Applications often require some transition effects while changing screens in order to enhance the look and feel which can be
achieved by using Transition APIs provided with the Microchip Graphics Library. Refer to Appendix C of the application note
AN1368: Developing Embedded Graphics Applications using PIC® Microcontrollers with Integrated Graphics Controller for a
graphical illustration of how transitions can be achieved.
In order to translate a new screen, the new screen has to be developed in a separate buffer and has to be copied to the frame
buffer (visible display buffer) part by part. The way the new screen data is copied into the frame buffer determines the transition
effect. A number of transition effects can be achieved by using the API: GFXTransition(left, top, right, bottom, type, srcpageaddr,
destpageaddr, delay_ms, param1, param2). This API copies the rectangular area defined by left, top, right and bottom from
address defined by srcpageaddr to the destpageaddr as per the transition defined by type, param1 and param2. The
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srcpageaddr should contain the new screen data and the destpageaddr must be the frame buffer address. The speed of the
transition can be configured by the parameter delay_ms which determines the delay between each copy operations. Note that
this API must be called only at the end of GFX_OBJ_DrawCallback() function in order to ensure that the new screen is fully
created in the RAM.
If double buffering is enabled, then using transitions is made easier by another API: GFXSetupTransition(left, top, right, bottom,
type, delay_ms, param1, param2). This API can be called immediately after creating the new screen and the graphics library will
store the request and initiate the transition after the new screen is fully created in the RAM. Note that this API doesn’t have
address parameters as the address of draw-buffer is already known to the double buffering subsystem of the graphics engine.
5.2.3.5 Configuring the Library
The configuration of the Graphics Primitive Library is based on the file system_config.h
This header file contains the configuration selection for the Graphics Primitive Library. Based on the selections made, the
Graphics Primitive Library will support or not support selected features. These configuration settings will apply to all instances of
the Graphics Primitive Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.2.3.5.1 Fonts
This compile option selects if the support for unicode fonts, unsigned char or the default signed char type fonts.
There are three types of font (characters) that can be used in the Graphics Library. This gives the user the option to implement
multi-language application or use the default signed char type.
Define in GraphicsConfig.h XCHAR type Description
#define USE_MULTIBYTECHAR #define XCHAR unsigned short Enable support for multi-byte fonts such as Unicode
fonts.
#define USE_UNSIGNED_XCHAR #define XCHAR unsigned char Enable support for character range of 0-255.
none of the two are defined #define XCHAR char Character range is set to 0-127.
Note: Only one of the two or none at all are defined in GraphicsConfig.h.
- #define USE_MULTIBYTECHAR
- #define USE_UNSIGNED_XCHAR
- when none are defined, XCHAR defaults to type char.
See XCHAR for details.
5.2.3.5.2 Alpha Blending
This compile option enables the Alpha-Blend feature in Primitive Layer.
5.2.3.5.3 Colors
Defines the color depth of the system
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5.2.3.5.4 Images
5.2.3.6 Building the Library
This section list the files that are available in the \src of the primitive driver. It lists which files need to be included in the build
based on either a hardware feature present on the board or configuration option selected by the system.
• gfx.h
5.2.3.7 Library Interface
Data Types and Constants
Name Description
GFX_CosineGet This is macro GFX_CosineGet.
GFX_GradientTypeSet This is macro GFX_GradientTypeSet.
GFX_SineGet This is macro GFX_SineGet.
Setup and Management Functions
Name Description
GFX_SineCosineGet This is function GFX_SineCosineGet.
Shape Functions
Name Description
GFXCirclePointGet This is function GFXCirclePointGet.
Description
This section describes the Application Programming Interface (API) functions of the Graphics Primitive Library.
5.2.3.7.1 Setup and Management Functions
5.2.3.7.1.1 GFX_SineCosineGet Function
C
int16_t GFX_SineCosineGet(
int16_t v,
GFX_TRIG_FUNCTION_TYPE type
);
Description
This is function GFX_SineCosineGet.
5.2.3.7.2 Text Functions
5.2.3.7.3 Shape Functions
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5.2.3.7.3.1 GFXCirclePointGet Function
C
void GFXCirclePointGet(
int16_t radius,
int16_t angle,
int16_t * x,
int16_t * y
);
Description
This is function GFXCirclePointGet.
5.2.3.7.4 Color Functions
5.2.3.7.5 Draw Functions
5.2.3.7.6 Image Functions
5.2.3.7.7 Double Buffering Functions
5.2.3.7.8 Data Types and Constants
5.2.3.7.8.1 GFX_CosineGet Macro
C
#define GFX_CosineGet(angle) GFX_SineCosineGet(angle, GFX_TRIG_COSINE_TYPE)
Description
This is macro GFX_CosineGet.
5.2.3.7.8.2 GFX_GradientTypeSet Macro
C
#define GFX_GradientTypeSet(value) GFX_Primitive_instance.gradientStyle.type = value
Description
This is macro GFX_GradientTypeSet.
5.2.3.7.8.3 GFX_SineGet Macro
C
#define GFX_SineGet(angle) GFX_SineCosineGet(angle, GFX_TRIG_SINE_TYPE)
Description
This is macro GFX_SineGet.
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5.2.3.8 Files
The Graphics Primitive Library files include:
• gfx_colors.h
• gfx_primitive.h
• gfx_transistions.h
• gfx_types_palette.h
• gfx_config_template.h
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5.3 Cryptographic (Crypto) Library
5.3.1 Introduction
Cryptographic Library
for
Microchip Microcontrollers
This library provides a software Cryptographic Library that is available on the Microchip family of microcontrollers with a
convenient C language interface.
Description
The Cryptographic Library includes functions to perform encryption, decryption, hashing, authentication, and compression within
the embedded application. Random number generation (RNG) functions are also provided.
Block Ciphers
The library provides DES, 3DES, and AES for block cipher needs. Depending on the algorithm in use, CBC and CTR modes are
supported.
Public Key Cryptography
The library provides RSA and Elliptic Curve Cryptography (ECC) for Public Key Cryptography, and Diffie-Hellman (DH) for key
agreement arrangements.
Hash Functions
The library provides MD5, SHA, SHA-256, SHA-384, and SHA-512 for hashing. These functions do not require keys or
initialization vectors (IV).
Random Number Generation Functions
The library provides functions to generate either a single pseudo-random number, or a block of such numbers.
5.3.2 Release Notes
MPLAB Harmony Version: v0.70b Cryptographic Library: 1.00 Release Date: 18Nov2013
New This Release:
Cryptographic Library
• Provides cryptographic, authentication, compression, and random number routines for use on PIC32MX and PIC32MZ families
• Authentication capabilities:
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• MD5
• SHA-1
• SHA-256
• SHA-384
• SHA-512
• HMAC
• Cryptographic capabilities:
• AES:
• 128-, 192-, 256-bit key lengths
• CBC, CTR, GCM, and CCM-8 modes
• RSA
• DES/Triple DES
• Elliptic Curve Cryptography (ECC)
• Random Number capabilities:
• Single random number
• Block of random numbers
• Compression capabilities:
• Huffman Encoding
Compression/Decompression “zlib” Library
The library includes the following new features:
• The library is a general purpose data compression library.
• Read and write gzip (.gz) format with an interface similar to that of stdio
• Huffman Encoding algorithms
Known Issues:
Cryptographic Library
• Nothing to report in this release.
Compression/Decompression “zlib” Library
• Nothing to report in this release
5.3.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
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YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.3.4 Using the Library
This topic describes the basic architecture of the Cryptographic (Crypto) Library and provides information and examples on how
to use it.
Interface Header File: crypto.h
The interface to the Cryptographic (Crypto) Library is defined in the "crypto.h.h" header file. This file is included by the
"crypto.h.h" file. Any C language source (.c) file that uses the Cryptographic (Crypto) Library should include "crypto.h.h".
Library File:
The Cryptographic (Crypto) Library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the Cryptographic (Crypto) Library interacts with the framework.
5.3.4.1 Abstraction Model
This library provides the low-level abstraction of the Cryptographic Library module on the Microchip family of microcontrollers
with a convenient C language interface. This topic describes how that abstraction is modeled in the software and introduces the
library interface.
Description
Cryptographic (Crypto) Software Abstraction Block Diagram
5.3.4.2 Library Overview
The Library Interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Cryptographic (Crypto) Library module.
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5.3.5 Configuring the Library
The configuration of the Cryptographic Library is based on the file sys_config.h
This header file contains the configuration selection for the Cryptographic Library. Based on the selections made, the
Cryptographic Library will support or not support selected features. These configuration settings will apply to all instances of the
Cryptographic Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.3.6 Building the Library
This section list the files that are available in the \src of the Cryptographic Library driver. It lists which files need to be included in
the build based on either a hardware feature present on the board or configuration option selected by the system.
5.3.7 Library Interface
Data Types and Constants
Name Description
CRYPT_AES_CTX AES
CRYPT_ECC_CTX ECC
CRYPT_HMAC_CTX HMAC
CRYPT_MD5_CTX MD5
CRYPT_RNG_CTX RNG
CRYPT_RSA_CTX RSA
CRYPT_SHA_CTX SHA
CRYPT_SHA256_CTX SHA-256
CRYPT_SHA384_CTX SHA-384
CRYPT_SHA512_CTX SHA-512
CRYPT_TDES_CTX TDES
MC_CRYPTO_API_H Defines Microchip CRYPTO API layer
AES Encryption/Decryption Functions
Name Description
CRYPT_AES_CBC_Decrypt
CRYPT_AES_CBC_Encrypt
CRYPT_AES_CTR_Encrypt
CRYPT_AES_DIRECT_Decrypt Direct encryption of one block of data.
CRYPT_AES_DIRECT_Encrypt Direct encryption of one block of data.
CRYPT_AES_IvSet
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CRYPT_AES_KeySet
Compression Functions
Name Description
CRYPT_HUFFMAN_Compress Compress a block of data.
CRYPT_HUFFMAN_DeCompress Decompress a block of data.
ECC Encryption/Decryption Functions
Name Description
CRYPT_ECC_DHE_KeyMake
CRYPT_ECC_DHE_SharedSecretMake
CRYPT_ECC_DSA_HashSign
CRYPT_ECC_DSA_HashVerify
CRYPT_ECC_Free
CRYPT_ECC_Initialize
CRYPT_ECC_KeySizeGet
CRYPT_ECC_PrivateImport
CRYPT_ECC_PublicExport
CRYPT_ECC_PublicImport
CRYPT_ECC_SignatureSizeGet
General Functions
Name Description
CRYPT_ERROR_StringGet
HMAC Hash Functions
Name Description
CRYPT_HMAC_DataAdd Add data to the HMAC calculation.
CRYPT_HMAC_Finalize Complete the HMAC calculation and get the results.
CRYPT_HMAC_SetKey Initialize the HMAC context and set the key for the hash.
MD5 Functions
Name Description
CRYPT_MD5_DataAdd Updates the hash with the data provided.
CRYPT_MD5_Finalize Finalizes the hash and puts the result into digest.
CRYPT_MD5_Initialize Initializes the internal structures necessary for MD5 hash calculations.
Random Number Generator Functions
Name Description
CRYPT_RNG_BlockGenerate Create several random numbers.
CRYPT_RNG_Get Get one random number.
CRYPT_RNG_Initialize Initialize random number generator.
RSA Encryption/Decryption Functions
Name Description
CRYPT_RSA_EncryptSizeGet
CRYPT_RSA_Free
CRYPT_RSA_Initialize
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CRYPT_RSA_PrivateDecrypt
CRYPT_RSA_PrivateKeyDecode
CRYPT_RSA_PublicEncrypt
CRYPT_RSA_PublicKeyDecode
SHA Hash functions
Name Description
CRYPT_SHA_DataAdd Updates the hash with the data provided.
CRYPT_SHA_Finalize Finalizes the hash and puts the result into digest.
CRYPT_SHA_Initialize Initializes the internal structures necessary for SHA hash calculations.
SHA256 Hash Functions
Name Description
CRYPT_SHA256_DataAdd Updates the hash with the data provided.
CRYPT_SHA256_Finalize Finalizes the hash and puts the result into digest.
CRYPT_SHA256_Initialize Initializes the internal structures necessary for SHA256 hash calculations.
SHA384 Hash Functions
Name Description
CRYPT_SHA384_DataAdd Updates the hash with the data provided.
CRYPT_SHA384_Finalize Finalizes the hash and puts the result into digest.
CRYPT_SHA384_Initialize Initializes the internal structures necessary for SHA384 hash calculations.
SHA512 Hash Functions
Name Description
CRYPT_SHA512_DataAdd Updates the hash with the data provided.
CRYPT_SHA512_Finalize Finalizes the hash and puts the result into digest.
CRYPT_SHA512_Initialize Initializes the internal structures necessary for SHA512 hash calculations.
Triple DES (3DES) Encryption/Decryption Functions
Name Description
CRYPT_TDES_CBC_Decrypt Decrypt a data block using Triple DES.
CRYPT_TDES_CBC_Encrypt Encrypt a data block using Triple DES.
CRYPT_TDES_IvSet Set the Initialization Vector (IV) for a Triple DES operation.
CRYPT_TDES_KeySet Initialization of Triple DES context.
Description
This section describes the Application Programming Interface (API) functions of the Cryptographic Library.
Refer to each section for a detailed description.
5.3.7.1 General Functions
5.3.7.1.1 CRYPT_ERROR_StringGet Function
C
int CRYPT_ERROR_StringGet(
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int,
char*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Remarks
String needs to be >= 80 chars.
Example
5.3.7.2 SHA512 Hash Functions
5.3.7.2.1 CRYPT_SHA512_DataAdd Function
C
int CRYPT_SHA512_DataAdd(
CRYPT_SHA512_CTX*,
const unsigned char*,
unsigned int
);
Description
This function updates the hash with the data provided.
Preconditions
The SHA512 context must be initialized prior to the first call of this function. The context must not be modified by code outside of
this function.
Parameters
Parameters Description
sha512 Pointer to CRYPT_SHA512_CTX strucure which holds the hash values.
input Pointer to the data to use to update the hash.
sz Size of the data (in bytes) of the data to use to update the hash.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function, either in sha512 or input.
• 0 - Otherwise.
Remarks
In order to preserve the validity of the SHA512 hash, nothing must modify the context holding variable between calls to
CRYPT_SHA512_DataAdd.
Example
CRYPT_SHA512_CTX sha512;
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uint8_t buffer[1024];
uint8_t sha512Sum[SHA512_DIGEST_SIZE];
CRYPT_SHA512_Initialize(&sha512);
CRYPT_SHA512_DataAdd(&sha512, buffer, sizeof(buffer));
CRYPT_SHA512_Finalize(&sha512, sha512Sum);
5.3.7.2.2 CRYPT_SHA512_Finalize Function
C
int CRYPT_SHA512_Finalize(
CRYPT_SHA512_CTX*,
unsigned char*
);
Description
This function finalizes the hash and puts the result into digest.
Preconditions
The SHA512 context must be initialized prior to calling this function. The context must not be modified by code outside of this
function.
Parameters
Parameters Description
sha512 Pointer to CRYPT_SHA512_CTX strucure which holds the hash values.
digest Pointer to byte array to store hash result.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function, either in sha512 or digest.
• 0 - Otherwise.
Remarks
In order to preserve the validity of the SHA512 hash, nothing must modify the context holding variable between calls to
CRYPT_SHA512_DataAdd and CRYPT_SHA512_Finalize.
Example
CRYPT_SHA512_CTX sha512;
uint8_t buffer[1024];
uint8_t sha512Sum[SHA512_DIGEST_SIZE];
CRYPT_SHA512_Initialize(&sha512);
CRYPT_SHA512_DataAdd(&sha512, buffer, sizeof(buffer));
CRYPT_SHA512_Finalize(&sha512, sha512Sum);
5.3.7.2.3 CRYPT_SHA512_Initialize Function
C
int CRYPT_SHA512_Initialize(
CRYPT_SHA512_CTX*
);
Description
This function initializes the internal structures necessary for SHA512 hash calculations.
Preconditions
None.
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Parameters
Parameters Description
sha512 Pointer to CRYPT_SHA512_CTX strucure which holds the hash values.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function.
• 0 - Otherwise.
Remarks
All SHA512 hashes have to start at a particular value before adding new data to it. This function sets the necessary values for
the structure.
Example
CRYPT_SHA512_CTX sha512;
uint8_t sha512Sum[SHA512_DIGEST_SIZE];
CRYPT_SHA512_Initialize(&sha512);
CRYPT_SHA512_DataAdd(&sha512, buffer, sizeof(buffer));
CRYPT_SHA512_Finalize(&sha512, sha512Sum);
5.3.7.3 HMAC Hash Functions
5.3.7.3.1 CRYPT_HMAC_DataAdd Function
C
int CRYPT_HMAC_DataAdd(
CRYPT_HMAC_CTX*,
const unsigned char*,
unsigned int
);
Description
This function adds data to the HMAC so that multiple blocks of data can be processed.
Preconditions
The CRYPT_HMAC_CTX context must be initialized using the CRYPT_HMAC_SetKey function prior to any call to this function.
Parameters
Parameters Description
hmac Pointer to context which saves state between calls.
input Pointer to the data to use to update the hash.
sz Size of the input data in bytes.
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Remarks
Example
CRYPT_HMAC_CTX mcHmac;
byte mcDigest[CRYPT_SHA512_DIGEST_SIZE];
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CRYPT_HMAC_SetKey(&mcHmac, CRYPT_HMAC_SHA, key, 4);
CRYPT_HMAC_DataAdd(&mcHmac, ourData, OUR_DATA_SIZE);
CRYPT_HMAC_Finalize(&mcHmac, mcDigest);
5.3.7.3.2 CRYPT_HMAC_Finalize Function
C
int CRYPT_HMAC_Finalize(
CRYPT_HMAC_CTX*,
unsigned char*
);
Description
This function completes the HMAC calculations. The results are placed in the location pointed to by digest.
Preconditions
The CRYPT_HMAC_CTX context must be initialized using the CRYPT_HMAC_SetKey function prior to any call to this function.
Parameters
Parameters Description
hmac Pointer to context which saves state between calls.
digest Pointer to place to put the final HMAC digest results.
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Remarks
The area pointed to by digest must be large enough to hold the results.
Example
CRYPT_HMAC_CTX mcHmac;
byte mcDigest[CRYPT_SHA512_DIGEST_SIZE];
CRYPT_HMAC_SetKey(&mcHmac, CRYPT_HMAC_SHA, key, 4);
CRYPT_HMAC_DataAdd(&mcHmac, ourData, OUR_DATA_SIZE);
CRYPT_HMAC_Finalize(&mcHmac, mcDigest);
5.3.7.3.3 CRYPT_HMAC_SetKey Function
C
int CRYPT_HMAC_SetKey(
CRYPT_HMAC_CTX*,
int,
const unsigned char*,
unsigned int
);
Description
This function initializes the HMAC context and set the key for the hash.
Preconditions
None.
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Parameters
Parameters Description
hmac Pointer to context which saves state between calls.
5.3.7.4 SHA384 Hash Functions
5.3.7.4.1 CRYPT_SHA384_DataAdd Function
C
int CRYPT_SHA384_DataAdd(
CRYPT_SHA384_CTX*,
const unsigned char*,
unsigned int
);
Description
This function updates the hash with the data provided.
Preconditions
The SHA384 context must be initialized prior to the first call of this function. The context must not be modified by code outside of
this function.
Parameters
Parameters Description
sha384 Pointer to CRYPT_SHA384_CTX strucure which holds the hash values.
input Pointer to the data to use to update the hash.
sz Size of the data (in bytes) of the data to use to update the hash.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function, either in sha384 or input.
• 0 - Otherwise.
Remarks
In order to preserve the validity of the SHA384 hash, nothing must modify the context holding variable between calls to
CRYPT_SHA384_DataAdd.
Example
CRYPT_SHA384_CTX sha384;
uint8_t buffer[1024];
uint8_t shaSum[SHA384_DIGEST_SIZE];
CRYPT_SHA384_Initialize(&sha384);
CRYPT_SHA384_DataAdd(&sha384, buffer, sizeof(buffer));
CRYPT_SHA384_Finalize(&sha384, shaSum);
5.3.7.4.2 CRYPT_SHA384_Finalize Function
C
int CRYPT_SHA384_Finalize(
CRYPT_SHA384_CTX*,
unsigned char*
);
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Description
This function finalizes the hash and puts the result into digest.
Preconditions
The SHA384 context must be initialized prior to calling this function. The context must not be modified by code outside of this
function.
Parameters
Parameters Description
sha384 Pointer to CRYPT_SHA384_CTX strucure which holds the hash values.
digest Pointer to byte array to store hash result.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function, either in sha384 or digest.
• 0 - Otherwise.
Remarks
In order to preserve the validity of the SHA384 hash, nothing must modify the context holding variable between calls to
CRYPT_SHA384_DataAdd and CRYPT_SHA384_Finalize.
Example
CRYPT_SHA384_CTX sha384;
uint8_t buffer[1024];
uint8_t shaSum[SHA384_DIGEST_SIZE];
CRYPT_SHA384_Initialize(&sha384);
CRYPT_SHA384_DataAdd(&sha384, buffer, sizeof(buffer));
CRYPT_SHA384_Finalize(&sha384, shaSum);
5.3.7.4.3 CRYPT_SHA384_Initialize Function
C
int CRYPT_SHA384_Initialize(
CRYPT_SHA384_CTX*
);
Description
This function initializes the internal structures necessary for SHA384 hash calculations.
Preconditions
None.
Parameters
Parameters Description
sha384 Pointer to CRYPT_SHA384_CTX strucure which holds the hash values.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function.
• 0 - Otherwise.
Remarks
All SHA384 hashes have to start at a particular value before adding new data to it. This function sets the necessary values for
the structure.
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Example
CRYPT_SHA384_CTX sha384;
uint8_t shaSum[SHA384_DIGEST_SIZE];
CRYPT_SHA384_Initialize(&sha384);
CRYPT_SHA384_DataAdd(&sha384, buffer, sizeof(buffer));
CRYPT_SHA384_Finalize(&sha384, shaSum);
5.3.7.5 SHA256 Hash Functions
5.3.7.5.1 CRYPT_SHA256_DataAdd Function
C
int CRYPT_SHA256_DataAdd(
CRYPT_SHA256_CTX*,
const unsigned char*,
unsigned int
);
Description
This function updates the hash with the data provided.
Preconditions
The SHA256 context must be initialized prior to the first call of this function. The context must not be modified by code outside of
this function.
Parameters
Parameters Description
sha256 Pointer to CRYPT_SHA256_CTX strucure which holds the hash values.
input Pointer to the data to use to update the hash.
sz Size of the data (in bytes) of the data to use to update the hash.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function, either in sha256 or input.
• 0 - Otherwise.
Remarks
In order to preserve the validity of the SHA256 hash, nothing must modify the context holding variable between calls to
CRYPT_SHA256_DataAdd.
Example
CRYPT_SHA256_CTX sha256;
uint8_t buffer[1024];
uint8_t shaSum[SHA256_DIGEST_SIZE];
CRYPT_SHA256_Initialize(&sha256);
CRYPT_SHA256_DataAdd(&sha256, buffer, sizeof(buffer));
CRYPT_SHA256_Finalize(&sha256, shaSum);
5.3.7.5.2 CRYPT_SHA256_Finalize Function
C
int CRYPT_SHA256_Finalize(
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CRYPT_SHA256_CTX*,
unsigned char*
);
Description
This function finalizes the hash and puts the result into digest.
Preconditions
The SHA256 context must be initialized prior to calling this function. The context must not be modified by code outside of this
function.
Parameters
Parameters Description
sha256 Pointer to CRYPT_SHA256_CTX strucure which holds the hash values.
digest Pointer to byte array to store hash result.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function, either in sha or digest.
• 0 - Otherwise.
Remarks
In order to preserve the validity of the SHA256 hash, nothing must modify the context holding variable between calls to
CRYPT_SHA256_DataAdd and CRYPT_SHA256_Finalize.
Example
CRYPT_SHA256_CTX sha256;
uint8_t buffer[1024];
uint8_t shaSum[SHA256_DIGEST_SIZE];
CRYPT_SHA256_Initialize(&sha256);
CRYPT_SHA256_DataAdd(&sha256, buffer, sizeof(buffer));
CRYPT_SHA256_Finalize(&sha256, shaSum);
5.3.7.5.3 CRYPT_SHA256_Initialize Function
C
int CRYPT_SHA256_Initialize(
CRYPT_SHA256_CTX*
);
Description
This function initializes the internal structures necessary for SHA256 hash calculations.
Preconditions
None.
Parameters
Parameters Description
sha256 Pointer to context which saves state between calls.
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Remarks
All SHA hashes have to start at a particular value before adding new data to it. This function sets the necessary values for the
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structure.
Example
CRYPT_SHA256_CTX sha;
uint8_t shaSum[SHA256_DIGEST_SIZE];
CRYPT_SHA256_Initialize(&sha);
CRYPT_SHA256_DataAdd(&sha, buffer, sizeof(buffer));
CRYPT_SHA256_Finalize(&sha, shaSum);
5.3.7.6 SHA Hash functions
5.3.7.6.1 CRYPT_SHA_DataAdd Function
C
int CRYPT_SHA_DataAdd(
CRYPT_SHA_CTX*,
const unsigned char*,
unsigned int
);
Description
This function updates the hash with the data provided.
Preconditions
The SHA context must be initialized prior to the first call of this function. The context must not be modified by code outside of this
function.
Parameters
Parameters Description
sha Pointer to CRYPT_SHA_CTX strucure which holds the hash values.
input Pointer to the data to use to update the hash.
sz Size of the data (in bytes) of the data to use to update the hash.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function, either in sha or input.
• 0 - Otherwise.
Remarks
In order to preserve the validity of the SHA hash, nothing must modify the context holding variable between calls to
CRYPT_SHA_DataAdd.
Example
CRYPT_SHA_CTX sha;
uint8_t buffer[1024];
uint8_t shaSum[SHA_DIGEST_SIZE];
CRYPT_SHA_Initialize(&sha);
CRYPT_SHA_DataAdd(&sha, buffer, sizeof(buffer));
CRYPT_SHA_Finalize(&sha, shaSum);
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5.3.7.6.2 CRYPT_SHA_Finalize Function
C
int CRYPT_SHA_Finalize(
CRYPT_SHA_CTX*,
unsigned char*
);
Description
This function finalizes the hash and puts the result into digest.
Preconditions
The SHA context must be initialized prior to calling this function. The context must not be modified by code outside of this
function.
Parameters
Parameters Description
sha Pointer to CRYPT_SHA_CTX strucure which holds the hash values.
digest Pointer to byte array to store hash result.
Returns
BAD_FUNC_ARG - An invalid pointer was passed to the function, either in sha or digest. 0 - Otherwise.
Remarks
In order to preserve the validity of the SHA hash, nothing must modify the context holding variable between calls to
CRYPT_SHA_DataAdd and CRYPT_SHA_Finalize.
Example
CRYPT_SHA_CTX sha;
uint8_t buffer[1024];
uint8_t shaSum[SHA_DIGEST_SIZE];
CRYPT_SHA_Initialize(&sha);
CRYPT_SHA_DataAdd(&sha, buffer, sizeof(buffer));
CRYPT_SHA_Finalize(&sha, shaSum);
5.3.7.6.3 CRYPT_SHA_Initialize Function
C
int CRYPT_SHA_Initialize(
CRYPT_SHA_CTX*
);
Description
This function initializes the internal structures necessary for SHA hash calculations.
Preconditions
None.
Parameters
Parameters Description
sha Pointer to CRYPT_SHA_CTX strucure which holds the hash values.
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Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function.
• 0 - Otherwise.
Remarks
All SHA hashes have to start at a particular value before adding new data to it. This function sets the necessary values for the
structure.
Example
CRYPT_SHA_CTX sha;
uint8_t shaSum[SHA_DIGEST_SIZE];
CRYPT_SHA_Initialize(&sha);
CRYPT_SHA_DataAdd(&sha, buffer, sizeof(buffer));
CRYPT_SHA_Finalize(&sha, shaSum);
5.3.7.7 Random Number Generator Functions
5.3.7.7.1 CRYPT_RNG_BlockGenerate Function
C
int CRYPT_RNG_BlockGenerate(
CRYPT_RNG_CTX*,
unsigned char*,
unsigned int
);
Description
This function generates several random numbers and places them in the space allocated.
Preconditions
RNG context was initialized using the CRYPT_RNG_Initialize function.
Parameters
Parameters Description
rng Pointer to context which saves state between calls.
b Pointer to buffer to store the random numbers.
sz Number of 8-bit random numbers to generate.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function.
• 0 - Otherwise.
Example
#define RANDOM_BYTE_SZ 32
int ret;
CRYPT_RNG_CTX mcRng;
byte out[RANDOM_BYTE_SZ];
ret = CRYPT_RNG_Initialize(&mcRng);
ret = CRYPT_RNG_Get(&mcRng, &out[0]);
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ret = CRYPT_RNG_BlockGenerate(&mcRng, out, RANDOM_BYTE_SZ);
5.3.7.7.2 CRYPT_RNG_Get Function
C
int CRYPT_RNG_Get(
CRYPT_RNG_CTX*,
unsigned char*
);
Description
This function gets one random number from the random number generator.
Preconditions
RNG context was initialized using the CRYPT_RNG_Initialize function.
Parameters
Parameters Description
rng Pointer to context which saves state between calls.
b Pointer to 8-bit location to store the result.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function.
• <0 - An error occurred.
• 0 or positive - Success.
Example
#define RANDOM_BYTE_SZ 32
int ret;
CRYPT_RNG_CTX mcRng;
byte out[RANDOM_BYTE_SZ];
ret = CRYPT_RNG_Initialize(&mcRng);
ret = CRYPT_RNG_Get(&mcRng, &out[0]);
ret = CRYPT_RNG_BlockGenerate(&mcRng, out, RANDOM_BYTE_SZ);
5.3.7.7.3 CRYPT_RNG_Initialize Function
C
int CRYPT_RNG_Initialize(
CRYPT_RNG_CTX*
);
Description
This function initializes the context that stores information relative to random number generation.
Preconditions
None.
Parameters
Parameters Description
rng Pointer to random number generator context.
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Returns
• negative - An error occurred setting up the random number generator.
• 0 - Otherwise.
Example
#define RANDOM_BYTE_SZ 32
int ret;
CRYPT_RNG_CTX mcRng;
byte out[RANDOM_BYTE_SZ];
ret = CRYPT_RNG_Initialize(&mcRng);
ret = CRYPT_RNG_Get(&mcRng, &out[0]);
ret = CRYPT_RNG_BlockGenerate(&mcRng, out, RANDOM_BYTE_SZ);
5.3.7.8 Compression Functions
5.3.7.8.1 CRYPT_HUFFMAN_Compress Function
C
int CRYPT_HUFFMAN_Compress(
unsigned char*,
unsigned int,
const unsigned char*,
unsigned int,
unsigned int
);
Description
This function compresses a block of data using Huffman encoding.
Preconditions
None.
Parameters
Parameters Description
out Pointer to location to store the compressed data.
outSz Maximum size of the output data in bytes.
in Point to location of source data.
inSz Size of the input data in bytes.
flags Flags to control how compress operates
Returns
• negative - error code
• positive - bytes stored in out buffer
Remarks
Output buffer must be large enough to hold the contents of the operation.
Example
const unsigned char text[] = "...";
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unsigned int inSz = sizeof(text);
unsigned int outSz;
unsigned char cBuffer[1024];
int ret;
ret = CRYPT_HUFFMAN_COMPRESS(cBuffer, sizeof(cBuffer), text, inSz, 0);
5.3.7.8.2 CRYPT_HUFFMAN_DeCompress Function
C
int CRYPT_HUFFMAN_DeCompress(
unsigned char*,
unsigned int,
const unsigned char*,
unsigned int
);
Description
This function decompresses a block of data using Huffman encoding.
Preconditions
None.
Parameters
Parameters Description
out Pointer to destination buffer
outSz Size of destination buffer
in Pointer to source buffer to decompres
inSz Size of source buffer to decompress
Returns
• negative - Error code
• positive - Bytes stored in out buffer
Remarks
Output buffer must be large enough to hold the contents of the operation.
Example
unsigned char cBuffer[1024];
unsigned char dBuffer[1024];
int ret
ret = CRYPT_HUFFMAN_DeCompress(dBuffer, sizeof(dBuffer), cBuffer, msglen);
5.3.7.9 ECC Encryption/Decryption Functions
5.3.7.9.1 CRYPT_ECC_DHE_KeyMake Function
C
int CRYPT_ECC_DHE_KeyMake(
CRYPT_ECC_CTX*,
CRYPT_RNG_CTX*,
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int
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.9.2 CRYPT_ECC_DHE_SharedSecretMake Function
C
int CRYPT_ECC_DHE_SharedSecretMake(
CRYPT_ECC_CTX*,
CRYPT_ECC_CTX*,
unsigned char*,
unsigned int,
unsigned int*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.9.3 CRYPT_ECC_DSA_HashSign Function
C
int CRYPT_ECC_DSA_HashSign(
CRYPT_ECC_CTX*,
CRYPT_RNG_CTX*,
unsigned char*,
unsigned int,
unsigned int*,
const unsigned char*,
unsigned int
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
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Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.9.4 CRYPT_ECC_DSA_HashVerify Function
C
int CRYPT_ECC_DSA_HashVerify(
CRYPT_ECC_CTX*,
const unsigned char*,
unsigned int,
unsigned char*,
unsigned int,
int*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.9.5 CRYPT_ECC_Free Function
C
int CRYPT_ECC_Free(
CRYPT_ECC_CTX*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.9.6 CRYPT_ECC_Initialize Function
C
int CRYPT_ECC_Initialize(
CRYPT_ECC_CTX*
);
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Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.9.7 CRYPT_ECC_KeySizeGet Function
C
int CRYPT_ECC_KeySizeGet(
CRYPT_ECC_CTX*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.9.8 CRYPT_ECC_PrivateImport Function
C
int CRYPT_ECC_PrivateImport(
CRYPT_ECC_CTX*,
const unsigned char*,
unsigned int,
const unsigned char*,
unsigned int
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
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5.3.7.9.9 CRYPT_ECC_PublicExport Function
C
int CRYPT_ECC_PublicExport(
CRYPT_ECC_CTX*,
unsigned char*,
unsigned int,
unsigned int*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.9.10 CRYPT_ECC_PublicImport Function
C
int CRYPT_ECC_PublicImport(
CRYPT_ECC_CTX*,
const unsigned char*,
unsigned int
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.9.11 CRYPT_ECC_SignatureSizeGet Function
C
int CRYPT_ECC_SignatureSizeGet(
CRYPT_ECC_CTX*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
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Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.10 Triple DES (3DES) Encryption/Decryption Functions
5.3.7.10.1 CRYPT_TDES_CBC_Decrypt Function
C
int CRYPT_TDES_CBC_Decrypt(
CRYPT_TDES_CTX*,
unsigned char*,
const unsigned char*,
unsigned int
);
Description
This function decrypts a block of data using a Triple DES algorithm.
Preconditions
The context tdes must be set earlier using CRYPT_TDES_KeySet. The input block must be a multiple of 8 bytes long.
Parameters
Parameters Description
tdes Pointer to context which saves state between calls.
out Pointer to output buffer to store the results.
in Pointer to input buffer for the source of the data.
inSz Size of the input data buffer.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function.
• 0 - Otherwise.
Remarks
Input data must have a length a multiple of 8 bytes. Output data will be zero-padded at the end if the original data was not a
multiple of 8 bytes long.
Example
CRYPT_TDES_CTX mcDes3;
int ret;
byte out1[TDES_SIZE];
byte out2[TDES_SIZE];
strncpy((char*)key, "1234567890abcdefghijklmn", 24);
strncpy((char*)iv, "12345678", 8);
ret = CRYPT_TDES_KeySet(&mcDes3, key, iv, CRYPT_TDES_ENCRYPTION);
ret = CRYPT_TDES_CBC_Encrypt(&mcDes3, out1, ourData, TDES_SIZE);
ret = CRYPT_TDES_KeySet(&mcDes3, key, iv, CRYPT_TDES_DECRYPTION);
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ret = CRYPT_TDES_CBC_Decrypt(&mcDes3, out2, out1, TDES_TEST_SIZE);
5.3.7.10.2 CRYPT_TDES_CBC_Encrypt Function
C
int CRYPT_TDES_CBC_Encrypt(
CRYPT_TDES_CTX*,
unsigned char*,
const unsigned char*,
unsigned int
);
Description
This function encrypts a block of data using a Triple DES algorithm.
Preconditions
The context tdes must be set earlier using CRYPT_TDES_KeySet. The input block must be a multiple of 8 bytes long.
Parameters
Parameters Description
tdes Pointer to context which saves state between calls.
out Pointer to output buffer to store the results.
in Pointer to input buffer for the source of the data.
inSz Size of the input data buffer.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function.
• 0 - Otherwise.
Remarks
The input data must be padded at the end with zeros to make the length a multiple of 8.
Example
CRYPT_TDES_CTX mcDes3;
int ret;
byte out1[TDES_SIZE];
byte out2[TDES_SIZE];
strncpy((char*)key, "1234567890abcdefghijklmn", 24);
strncpy((char*)iv, "12345678", 8);
ret = CRYPT_TDES_KeySet(&mcDes3, key, iv, CRYPT_TDES_ENCRYPTION);
ret = CRYPT_TDES_CBC_Encrypt(&mcDes3, out1, ourData, TDES_SIZE);
ret = CRYPT_TDES_KeySet(&mcDes3, key, iv, CRYPT_TDES_DECRYPTION);
ret = CRYPT_TDES_CBC_Decrypt(&mcDes3, out2, out1, TDES_TEST_SIZE);
5.3.7.10.3 CRYPT_TDES_IvSet Function
C
int CRYPT_TDES_IvSet(
CRYPT_TDES_CTX*,
const unsigned char*
);
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Description
This function changes the IV of a TDES context, but leaves the Key alone.
Preconditions
None.
Parameters
Parameters Description
tdes Pointer to context which saves state between calls.
iv Pointer to buffer holding the initialization vector. Must be 8 bytes in size.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function.
• 0 - Otherwise.
Remarks
The IV must be 8 bytes long.
Example
CRYPT_TDES_CTX mcDes3;
int ret;
byte out1[TDES_SIZE];
byte out2[TDES_SIZE];
strncpy((char*)key, "1234567890abcdefghijklmn", 24);
strncpy((char*)iv, "12345678", 8);
ret = CRYPT_TDES_KeySet(&mcDes3, key, iv, CRYPT_TDES_ENCRYPTION);
ret = CRYPT_TDES_IvSet(&mcDes3, iv);
ret = CRYPT_TDES_CBC_Encrypt(&mcDes3, out1, ourData, TDES_SIZE);
ret = CRYPT_TDES_KeySet(&mcDes3, key, iv, CRYPT_TDES_DECRYPTION);
ret = CRYPT_TDES_CBC_Decrypt(&mcDes3, out2, out1, TDES_TEST_SIZE);
5.3.7.10.4 CRYPT_TDES_KeySet Function
C
int CRYPT_TDES_KeySet(
CRYPT_TDES_CTX*,
const unsigned char*,
const unsigned char*,
int
);
Description
This function sets the key and initialization vector (IV) for a set of Triple-DES operations.
Preconditions
None.
Parameters
Parameters Description
tdes Pointer to context which saves state between calls.
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key Pointer to buffer holding the key. Must be 24 bytes in size.
iv Pointer to buffer holding the initialization vector. Must be 8 bytes in size.
5.3.7.11 RSA Encryption/Decryption Functions
5.3.7.11.1 CRYPT_RSA_EncryptSizeGet Function
C
int CRYPT_RSA_EncryptSizeGet(
CRYPT_RSA_CTX*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.11.2 CRYPT_RSA_Free Function
C
int CRYPT_RSA_Free(
CRYPT_RSA_CTX*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.11.3 CRYPT_RSA_Initialize Function
C
int CRYPT_RSA_Initialize(
CRYPT_RSA_CTX*
);
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Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.11.4 CRYPT_RSA_PrivateDecrypt Function
C
int CRYPT_RSA_PrivateDecrypt(
CRYPT_RSA_CTX*,
unsigned char*,
unsigned int,
const unsigned char*,
unsigned int
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.11.5 CRYPT_RSA_PrivateKeyDecode Function
C
int CRYPT_RSA_PrivateKeyDecode(
CRYPT_RSA_CTX*,
const unsigned char*,
unsigned int
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
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5.3.7.11.6 CRYPT_RSA_PublicEncrypt Function
C
int CRYPT_RSA_PublicEncrypt(
CRYPT_RSA_CTX*,
unsigned char*,
unsigned int,
const unsigned char*,
unsigned int,
CRYPT_RNG_CTX*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.11.7 CRYPT_RSA_PublicKeyDecode Function
C
int CRYPT_RSA_PublicKeyDecode(
CRYPT_RSA_CTX*,
const unsigned char*,
unsigned int
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.12 AES Encryption/Decryption Functions
5.3.7.12.1 CRYPT_AES_CBC_Decrypt Function
C
int CRYPT_AES_CBC_Decrypt(
CRYPT_AES_CTX*,
unsigned char*,
const unsigned char*,
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unsigned int
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.12.2 CRYPT_AES_CBC_Encrypt Function
C
int CRYPT_AES_CBC_Encrypt(
CRYPT_AES_CTX*,
unsigned char*,
const unsigned char*,
unsigned int
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.12.3 CRYPT_AES_CTR_Encrypt Function
C
int CRYPT_AES_CTR_Encrypt(
CRYPT_AES_CTX*,
unsigned char*,
const unsigned char*,
unsigned int
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
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Remarks
ctr (counter), use Encrypt both ways with ENCRYPT key setup
Example
5.3.7.12.4 CRYPT_AES_DIRECT_Decrypt Function
C
int CRYPT_AES_DIRECT_Decrypt(
CRYPT_AES_CTX*,
unsigned char*,
const unsigned char*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.12.5 CRYPT_AES_DIRECT_Encrypt Function
C
int CRYPT_AES_DIRECT_Encrypt(
CRYPT_AES_CTX*,
unsigned char*,
const unsigned char*
);
Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.12.6 CRYPT_AES_IvSet Function
C
int CRYPT_AES_IvSet(
CRYPT_AES_CTX*,
const unsigned char*
);
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Parameters
Parameters Description
Param1 Pointer to context which saves state between calls.
Param2 Param3 -
Param4 Param5 -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.12.7 CRYPT_AES_KeySet Function
C
int CRYPT_AES_KeySet(
CRYPT_AES_CTX*,
const unsigned char*,
unsigned int,
const unsigned char*,
int
);
Parameters
Parameters Description
aes Pointer to context which saves state between calls.
key keyLen -
iv dir -
Returns
*BAD_FUNC_ARG - An invalid pointer was passed to the function. *0 - Otherwise.
Example
5.3.7.13 MD5 Functions
5.3.7.13.1 CRYPT_MD5_DataAdd Function
C
int CRYPT_MD5_DataAdd(
CRYPT_MD5_CTX*,
const unsigned char*,
unsigned int
);
Description
This function updates the hash with the data provided.
Preconditions
The MD5 context must be initialized prior to the first call of this function. The context must not be modified by code outside of this
function.
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Parameters
Parameters Description
md5 Pointer to CRYPT_MD5_CTX strucure which holds the hash values.
input Pointer to the data to use to update the hash.
sz Size of the data (in bytes) of the data to use to update the hash.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function, either in md5 or input.
• 0 - Otherwise.
Remarks
In order to preserve the validity of the MD5 hash, nothing must modify the context holding variable between calls to
CRYPT_MD5_DataAdd.
Example
CRYPT_MD5_CTX md5;
uint8_t buffer[1024];
uint8_t md5sum[MD5_DIGEST_SIZE];
CRYPT_MD5_Initialize(&md5);
CRYPT_MD5_DataAdd(&md5, buffer, sizeof(buffer));
CRYPT_MD5_Finalize(&md5, md5sum);
5.3.7.13.2 CRYPT_MD5_Finalize Function
C
int CRYPT_MD5_Finalize(
CRYPT_MD5_CTX*,
unsigned char*
);
Description
This function finalizes the hash and puts the result into digest.
Preconditions
The MD5 context must be initialized prior to calling this function. The context must not be modified by code outside of this
function.
Parameters
Parameters Description
md5 Pointer to CRYPT_MD5_CTX strucure which holds the hash values.
digest Pointer to byte array to store hash result.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function, either in md5 or digest.
• 0 - Otherwise.
Remarks
In order to preserve the validity of the MD5 hash, nothing must modify the context holding variable between calls to
CRYPT_MD5_DataAdd and CRYPT_MD5_Finalize.
Example
CRYPT_MD5_CTX md5;
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uint8_t buffer[1024];
uint8_t md5sum[MD5_DIGEST_SIZE];
CRYPT_MD5_Initialize(&md5);
CRYPT_MD5_DataAdd(&md5, buffer, sizeof(buffer));
CRYPT_MD5_Finalize(&md5, md5sum);
5.3.7.13.3 CRYPT_MD5_Initialize Function
C
int CRYPT_MD5_Initialize(
CRYPT_MD5_CTX* md5
);
Description
This function initializes the internal structures necessary for MD5 hash calculations.
Preconditions
None.
Parameters
Parameters Description
md5 Pointer to CRYPT_MD5_CTX strucure which holds the hash values.
Returns
• BAD_FUNC_ARG - An invalid pointer was passed to the function.
• 0 - Otherwise.
Remarks
All MD5 hashes have to start at a particular value before adding new data to it. This function sets the necessary values for the
structure.
Example
CRYPT_MD5_CTX md5;
uint8_t buffer[1024];
uint8_t md5sum[MD5_DIGEST_SIZE];
CRYPT_MD5_Initialize(&md5);
CRYPT_MD5_DataAdd(&md5, buffer, sizeof(buffer));
CRYPT_MD5_Finalize(&md5, md5sum);
5.3.7.14 Data Types and Constants
5.3.7.14.1 CRYPT_AES_CTX Structure
C
struct CRYPT_AES_CTX {
int holder[69];
};
Description
AES
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Members
Members Description
int holder[69]; big enough to hold internal, but check on init
5.3.7.14.2 CRYPT_ECC_CTX Structure
C
struct CRYPT_ECC_CTX {
void* holder;
};
Description
ECC
5.3.7.14.3 CRYPT_HMAC_CTX Structure
C
struct CRYPT_HMAC_CTX {
long long holder[67];
};
Description
HMAC
Members
Members Description
long long holder[67]; big enough to hold internal, but check on init
5.3.7.14.4 CRYPT_MD5_CTX Structure
C
struct CRYPT_MD5_CTX {
int holder[24];
};
Description
MD5
Members
Members Description
int holder[24]; big enough to hold internal, but check on init
5.3.7.14.5 CRYPT_RNG_CTX Structure
C
struct CRYPT_RNG_CTX {
int holder[66];
};
Description
RNG
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Members
Members Description
int holder[66]; big enough to hold internal, but check on init
5.3.7.14.6 CRYPT_RSA_CTX Structure
C
struct CRYPT_RSA_CTX {
void* holder;
};
Description
RSA
5.3.7.14.7 CRYPT_SHA_CTX Structure
C
struct CRYPT_SHA_CTX {
int holder[24];
};
Description
SHA
Members
Members Description
int holder[24]; big enough to hold internal, but check on init
5.3.7.14.8 CRYPT_SHA256_CTX Structure
C
struct CRYPT_SHA256_CTX {
int holder[28];
};
Description
SHA-256
Members
Members Description
int holder[28]; big enough to hold internal, but check on init
5.3.7.14.9 CRYPT_SHA384_CTX Structure
C
struct CRYPT_SHA384_CTX {
long long holder[32];
};
Description
SHA-384
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Members
Members Description
long long holder[32]; big enough to hold internal, but check on init
5.3.7.14.10 CRYPT_SHA512_CTX Structure
C
struct CRYPT_SHA512_CTX {
long long holder[36];
};
Description
SHA-512
Members
Members Description
long long holder[36]; big enough to hold internal, but check on init
5.3.7.14.11 CRYPT_TDES_CTX Structure
C
struct CRYPT_TDES_CTX {
int holder[100];
};
Description
TDES
Members
Members Description
int holder[100]; big enough to hold internal, but check on init
5.3.7.14.12 MC_CRYPTO_API_H Macro
C
#define MC_CRYPTO_API_H
Description
Defines Microchip CRYPTO API layer
5.3.8 Files
Files
Name Description
crypto.h Crypto Framework Libarary header for cryptographic functions.
Description
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5.3.8.1 crypto.h
Crypto Framework Library Header
This header file contains function prototypes and definitions of the data types and constants that make up the Cryptographic
Framework Library for PIC32 families of Microchip microcontrollers.
Functions
Name Description
CRYPT_AES_CBC_Decrypt
CRYPT_AES_CBC_Encrypt
CRYPT_AES_CTR_Encrypt
CRYPT_AES_DIRECT_Decrypt Direct encryption of one block of data.
CRYPT_AES_DIRECT_Encrypt Direct encryption of one block of data.
CRYPT_AES_IvSet
CRYPT_AES_KeySet
CRYPT_ECC_DHE_KeyMake
CRYPT_ECC_DHE_SharedSecretMake
CRYPT_ECC_DSA_HashSign
CRYPT_ECC_DSA_HashVerify
CRYPT_ECC_Free
CRYPT_ECC_Initialize
CRYPT_ECC_KeySizeGet
CRYPT_ECC_PrivateImport
CRYPT_ECC_PublicExport
CRYPT_ECC_PublicImport
CRYPT_ECC_SignatureSizeGet
CRYPT_ERROR_StringGet
CRYPT_HMAC_DataAdd Add data to the HMAC calculation.
CRYPT_HMAC_Finalize Complete the HMAC calculation and get the results.
CRYPT_HMAC_SetKey Initialize the HMAC context and set the key for the hash.
CRYPT_HUFFMAN_Compress Compress a block of data.
CRYPT_HUFFMAN_DeCompress Decompress a block of data.
CRYPT_MD5_DataAdd Updates the hash with the data provided.
CRYPT_MD5_Finalize Finalizes the hash and puts the result into digest.
CRYPT_MD5_Initialize Initializes the internal structures necessary for MD5 hash calculations.
CRYPT_RNG_BlockGenerate Create several random numbers.
CRYPT_RNG_Get Get one random number.
CRYPT_RNG_Initialize Initialize random number generator.
CRYPT_RSA_EncryptSizeGet
CRYPT_RSA_Free
CRYPT_RSA_Initialize
CRYPT_RSA_PrivateDecrypt
CRYPT_RSA_PrivateKeyDecode
CRYPT_RSA_PublicEncrypt
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CRYPT_RSA_PublicKeyDecode
CRYPT_SHA_DataAdd Updates the hash with the data provided.
CRYPT_SHA_Finalize Finalizes the hash and puts the result into digest.
CRYPT_SHA_Initialize Initializes the internal structures necessary for SHA hash calculations.
CRYPT_SHA256_DataAdd Updates the hash with the data provided.
CRYPT_SHA256_Finalize Finalizes the hash and puts the result into digest.
CRYPT_SHA256_Initialize Initializes the internal structures necessary for SHA256 hash calculations.
CRYPT_SHA384_DataAdd Updates the hash with the data provided.
CRYPT_SHA384_Finalize Finalizes the hash and puts the result into digest.
CRYPT_SHA384_Initialize Initializes the internal structures necessary for SHA384 hash calculations.
CRYPT_SHA512_DataAdd Updates the hash with the data provided.
CRYPT_SHA512_Finalize Finalizes the hash and puts the result into digest.
CRYPT_SHA512_Initialize Initializes the internal structures necessary for SHA512 hash calculations.
CRYPT_TDES_CBC_Decrypt Decrypt a data block using Triple DES.
CRYPT_TDES_CBC_Encrypt Encrypt a data block using Triple DES.
CRYPT_TDES_IvSet Set the Initialization Vector (IV) for a Triple DES operation.
CRYPT_TDES_KeySet Initialization of Triple DES context.
Macros
Name Description
MC_CRYPTO_API_H Defines Microchip CRYPTO API layer
Structures
Name Description
CRYPT_AES_CTX AES
CRYPT_ECC_CTX ECC
CRYPT_HMAC_CTX HMAC
CRYPT_MD5_CTX MD5
CRYPT_RNG_CTX RNG
CRYPT_RSA_CTX RSA
CRYPT_SHA_CTX SHA
CRYPT_SHA256_CTX SHA-256
CRYPT_SHA384_CTX SHA-384
CRYPT_SHA512_CTX SHA-512
CRYPT_TDES_CTX TDES
Company
Microchip Technology Inc.
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5.4 Math Library Help
5.4.1 DSP Fixed-Point Library
5.4.1.1 Introduction
DSP Fixed-Point Library
for
Microchip Microcontrollers
The DSP Fixed-Point Library is available for the PIC32MZ family of microcontrollers. This library was created from optimized
assembly routines written specifically for the microAptivTM core.
Description
The DSP Fixed-Point Library contains building block functions for developing digital signal processing algorithms. The library
supports the Q15 and Q31 fractional data formats. The functions are implemented in efficient assembly specifically targeted at
the DSP extensions in this core family. The library makes these functions available in a simple C-callable structure.
Functions included in the DSP Fixed-Point Library include complex math, vector math, matrix math, digital filters, and transforms.
In many cases, these functions require specific data structures to operate, which are detailed in the header file and examples.
5.4.1.2 Release Notes
MPLAB Harmony Version: v0.70b DSP Fixed-Point Library Version : 1.0 Release Date: 18Nov2013
New This Release:
• 98 functions:
• Vector math
• Complex math
• Transforms
• Digital Filters
• Matrix math
• 16-bit and 32-bit fixed-point integer functions
• Optimized in high performance assembly
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Known Issues:
• Optimized for PIC32MZ microAptivTM core only
• Will not function with _Fract data type
5.4.1.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.4.1.4 Using the Library
This topic describes the basic architecture of the DSP Fixed-Point Library and provides information and examples on how to use
it.
Interface Header File: dsp.h, libq.h
The interface to the DSP Fixed-Point library is defined in the "dsp.h" header file. Any C language source (.c) file that uses the
DSP Fixed-Point library must include "dsp.h".
Some functions make special use of the optimized fixed-point math library libq.h. For use of those functions, the libq.h file must
also be included in a project. The libq.h file is also installed with MPLAB Harmony. Specific notes within each function will
describe if the function is dependent on the libq library.
Library File: dsp.a, libq.a
The DSP Fixed-Point library archive (.a) file installed with MPLAB Harmony.
This library is only available in binary form, with prototypes for each function described in the dsp.h file.
In the case of functions that are supported by libq, the fixed-point math function library, the libq.a library must also be installed.
This library is also available in binary form and is installed with MPLAB Harmony.
5.4.1.4.1 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the DSP Fixed-Point Library.
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Library Interface Section Description
Complex Math Functions General mathematical operations using a complex structure with the form
(a + bi)
Vector Math Functions Mathematical operations on a array of numbers or vector
Matrix Math Functions Mathematical operations on a matrix
Digital Filtering Functions FIR and IIR filtering functions with various architectures
Digital Transform Functions FFT, Windows and related transform elements
Support Functions Quick support functions for numerical transform
The DSP Fixed-Point Library uses fixed-point fractional functions to optimize execution speed. These functions limit the accuracy
of the calculations to the bits specified for the function. Due to parallelism in some operations, the 16-bit version of the functions
are more efficient than their 32-bit counterparts. In many cases both 16-bit and 32-bit functions are available to give the user the
choice of balance between speed and functional resolution.
Fractional representation of a real number is given by:
Qn.m
where:
• n is the number of data bits to the left of the radix point
• m is the number of data bits to the right of the radix point
• a signed bit is implied, and takes one bit of resolution
• Shorthand may eliminate the leading 0, such as in Q0.15, which may be shortened to Q15, and similarly Q0.31, which is
shortened to Q31
Qn.m numerical values are used by the library processing data as integers. In this format the n represents the number of integer
bits, and the m represents the number of fractional bits. All values assume a sign bit in the most significant bit. Therefore, the
range of the numerical value is:
-2(n-1) to [2(n-1) - 2(-m)]; with a resolution of 2(-m)
.
A Q16 format number (Q15.16) would range from -32768.0 (0x8000 0000) to 32767.99998474 with a precision of 0.000015259
(or 2-16).
For example, a numerical representation of the number 3.14159 in Q2.13 notation would be:
3.14159 * 213 = 25735.9 => 0x6488
And converting from the Q7.8 format with the value 0x1D89 would be:
0x1D89 / 28
= 7561 / 256 => 29.5316, accurate to 0.00391
A majority of the DSP Fixed-Point Library uses functions with variables in Q15 or Q31 format. Representations of these numbers
are given in the Types section of this document, and generally are int16_t(for Q15 fractional representation) and int32_t (for Q31
fractional representation). This limits the equivalent numerical range to roughly -1.0 to 0.999999999. It is possible to represent
other number ranges, but scaling before and after the function call are necessary.
All library functions will saturate the output if the value exceeds the maximum or is lower than the minimum allowable value for
that resolution. Some pre-scaling may be necessary to prevent unwanted saturation in functions that may otherwise create
calculation errors.
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5.4.1.4.2 Table of Library Functions
Family Function Definition
Complex
Math
Addition DSP_ComplexAdd32
Conjugate DSP_ComplexConj32
Dot Product DSP_ComplexDotProd32
Multiplication DSP_ComplexMult32
Scalar Multiplication DSP_ComplexScalarMult32
Subtraction DSP_ComplexSub32
Digital
Filter
FIR DSP_FilterFIR32
FIR Decimation DSP_FilterFIRDecim32
FIR Interpolation DSP_FilterFIRInterp32
FIR LMS DSP_FilterLMS16
IIR DSP_FilterIIR16; DSP_FilterIIRSetup16
IIR Biquad DSP_FilterIIRBQ16; DSP_FilterIIRBQ16_fast; DSP_FilterIIRBQ32
IIR Biquad Cascade DSP_FilterIIRBQ16_cascade8; DSP_FilterIIRBQ16_cascade8_fast
IIR Biquad Parallel DSP_FilterIIRBQ16_parallel8; DSP_FilterIIRBQ16_parallel8_fast
Matrix
Math
Addition DSP_MatrixAdd32
Equality DSP_MatrixEqual32
Initialization DSP_MatrixInit32
Multiplication DSP_MatrixMul32
Scale DSP_MatrixScale32
Subtraction DSP_MatrixSub32
Transpose DSP_MatrixTranspose32
Transform FFT DSP_TransformFFT16; DSP_TransformFFT32
Setup factors DSP_TransformFFT16_setup; DSP_TransformFFT32_setup
inverse FFT DSP_TransformIFFT16
Windows DSP_TransformWindow_Bart16; DSP_TransformWindow_Bart32;
DSP_TransformWindow_Black16; DSP_TransformWindow_Black32;
DSP_TransformWindow_Cosine16; DSP_TransformWindow_Cosine32;
DSP_TransformWindow_Hamm16; DSP_TransformWindow_Hamm32;
DSP_TransformWindow_Hann16; DSP_TransformWindow_Hann32;
DSP_TransformWindow_Kaiser16; DSP_TransformWindow_Kaiser32;
Window Initialization DSP_TransformWinInit_Bart16; DSP_TransformWinInit_Bart32;
DSP_TransformWinInit_Black16; DSP_TransformWinInit_Black32;
DSP_TransformWinInit_Cosine16; DSP_TransformWinInit_Cosine32;
DSP_TransformWinInit_Hamm16; DSP_TransformWinInit_Hamm32;
DSP_TransformWinInit_Hann16; DSP_TransformWinInit_Hann32;
DSP_TransformWinInit_Kaiser16; DSP_TransformWinInit_Kaiser32
Vector
Math
Absolute value DSP_VectorAbs16; DSP_VectorAbs32
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Addition DSP_VectorAdd16;
DSP_VectorAdd32
Addition w/ constant DSP_VectorAddc16; DSP_VectorAddc32
Binary exponent DSP_VectorBexp16; DSP_VectorBexp32
Log, Exponent,
Square root
DSP_VectorExp; DSP_VectorLog10; DSP_VectorLog2; DSP_VectorLn; DSP_VectorSqrt;
Multiplication &
Division
DSP_VectorMul16; DSP_VectorMul32; DSP_VectorDotp16;
DSP_VectorDotp32; DSP_VectorMulc16; DSP_VectorMulc32; DSP_VectorDivC;
DSP_VectorRecip
Subtraction DSP_VectorSub16; DSP_VectorSub32
Power (sum of
squares)
DSP_VectorSumSquares16; DSP_VectorSumSquares32
Equality check DSP_VectorChkEqu32
Maximum DSP_VectorMax32; DSP_VectorMaxIndex32
Minimum DSP_VectorMin32; DSP_VectorMinIndex32
Copy & Fill DSP_VectorCopy; DSP_VectorFill; DSP_VectorZeroPad
Shift DSP_VectorShift; DSP_VectorCopyReverse32
Negate DSP_VectorNegate
Statistics DSP_VectorAutocorr16; DSP_VectorMean32; DSP_VectorRMS16; DSP_VectorStdDev16;
DSP_VectorVari16; DSP_VectorVariance
5.4.1.5 Library Interface
Data Types and Constants
Name Description
biquad16 Q15 biquad
int16c Q15 complex number (a + bi)
int32c Q31 complex number (a + bi)
matrix32 Q31 matrix
PARM_EQUAL_FILTER IIR BQ filter structure Q15 data, Q31 storage
PARM_EQUAL_FILTER_16 IIR BQ filter structure Q15
PARM_EQUAL_FILTER_32 IIR BQ filter structure Q31
PARM_FILTER_GAIN filter gain structure
_PARM_EQUAL_FILTER IIR BQ filter structure Q15 data, Q31 storage
_PARM_EQUAL_FILTER_16 IIR BQ filter structure Q15
_PARM_EQUAL_FILTER_32 IIR BQ filter structure Q31
MAX16 maximum Q15
MAX32 maximum Q31
MIN16 minimum Q15
MIN32 minimum Q31
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Complex Math Functions
Name Description
DSP_ComplexAdd32 Calculates the sum of two complex numbers.
DSP_ComplexConj16 Calculates the complex conjugate of a complex number.
DSP_ComplexConj32 Calculates the complex conjugate of a complex number.
DSP_ComplexDotProd32 Calculates the dot product of two complex numbers.
DSP_ComplexMult32 Multiplies two complex numbers.
DSP_ComplexScalarMult32 Multiplies a complex number and a scalar number.
DSP_ComplexSub32 Calculates the difference of two complex numbers.
Digital Filter Functions
Name Description
DSP_FilterFIR32 Performs a Finite Infitire Repspose filter on a vector.
DSP_FilterFIRDecim32 Performs a decimating FIR filter on the input array.
DSP_FilterFIRInterp32 Performs an interpolating FIR filter on the input array.
DSP_FilterIIR16 Performs a single-sample cascaded biquad Infiite Impulse Response (IIR)
filter.
DSP_FilterIIRBQ16 Performs a single-pass IIR Biquad Filter.
DSP_FilterIIRBQ16_cascade8 Performs a single IIR Biquad Filter as a cascade of 8 series filters.
DSP_FilterIIRBQ16_cascade8_fast Performs a single IIR Biquad Filter as a cascade of 8 series filters.
DSP_FilterIIRBQ16_fast Performs a single-pass IIR Biquad Filter.
DSP_FilterIIRBQ16_parallel8 Performs a 8 parallel single-pass IIR Biquad Filters, and sums the result.
DSP_FilterIIRBQ16_parallel8_fast Performs a 8 parallel single-pass IIR Biquad Filters, and sums the result.
DSP_FilterIIRBQ32 Performs a high resolution single-pass IIR Biquad Filter.
DSP_FilterIIRSetup16 Converts biquad structure to coeffs array to set up IIR filter.
DSP_FilterLMS16 Performs a single sample Least Mean Squares FIR Filter.
Matrix Math Functions
Name Description
DSP_MatrixAdd32 Addition of two matrices C = (A + B).
DSP_MatrixEqual32 Equality of two matrices C = (A).
DSP_MatrixInit32 Initializes the first N elements of a Matrix to the value num.
DSP_MatrixMul32 Multiplication of two matrices C = A x B.
DSP_MatrixScale32 Scales each element of an input buffer (matrix) by a fixed number.
DSP_MatrixSub32 Subtraction of two matrices C = (A - B).
DSP_MatrixTranspose32 Transpose of a Matrix C = A (T).
Support Functions
Name Description
mul16 multiply and shift integer
mul16r multiply and shift Q15
mul32 multiply and shift Q31
SAT16 saturate both positive and negative Q15
SAT16N saturate negative Q15
SAT16P saturate positive Q15
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Transform Functions
Name Description
DSP_TransformFFT16 Creates an Fast Fourier Transform (FFT) from a time domain input.
DSP_TransformFFT16_setup Creates FFT coefficients for use in the FFT16 function.
DSP_TransformFFT32 Creates an Fast Fourier Transform (FFT) from a time domain input.
DSP_TransformFFT32_setup Creates FFT coefficients for use in the FFT32 function.
DSP_TransformIFFT16 Creates an Inverse Fast Fourier Transform (FFT) from a frequency domain
input.
DSP_TransformWindow_Bart16 Perform a Bartlett window on a vector.
DSP_TransformWindow_Bart32 Perform a Bartlett window on a vector.
DSP_TransformWindow_Black16 Perform a Blackman window on a vector.
DSP_TransformWindow_Black32 Perform a Blackman window on a vector.
DSP_TransformWindow_Cosine16 Perform a Cosine (Sine) window on a vector.
DSP_TransformWindow_Cosine32 Perform a Cosine (Sine) window on a vector.
DSP_TransformWindow_Hamm16 Perform a Hamming window on a vector.
DSP_TransformWindow_Hamm32 Perform a Hamming window on a vector.
DSP_TransformWindow_Hann16 Perform a Hanning window on a vector.
DSP_TransformWindow_Hann32 Perform a Hanning window on a vector.
DSP_TransformWindow_Kaiser16 Perform a Kaiser window on a vector.
DSP_TransformWindow_Kaiser32 Perform a Kaiser window on a vector.
DSP_TransformWinInit_Bart16 Create a Bartlett window.
DSP_TransformWinInit_Bart32 Create a Bartlett window.
DSP_TransformWinInit_Black16 Create a Blackman window.
DSP_TransformWinInit_Black32 Create a Blackman window.
DSP_TransformWinInit_Cosine16 Create a Cosine (Sine) window.
DSP_TransformWinInit_Cosine32 Create a Cosine (Sine) window.
DSP_TransformWinInit_Hamm16 Create a Hamming window.
DSP_TransformWinInit_Hamm32 Create a Hamming window.
DSP_TransformWinInit_Hann16 Create a Hanning window.
DSP_TransformWinInit_Hann32 Create a Hanning window.
DSP_TransformWinInit_Kaiser16 Create a Kaiser window.
DSP_TransformWinInit_Kaiser32 Create a Kaiser window.
Vector Math Functions
Name Description
DSP_VectorAbs16 Calculate the absolute value of a vector.
DSP_VectorAbs32 Calculate the absolute value of a vector.
DSP_VectorAdd16 Calculate the sum of two vectors.
DSP_VectorAdd32 Calculate the sum of two vectors.
DSP_VectorAddc16 Calculate the sum of two vectors.
DSP_VectorAddc32 Calculate the sum of two vectors.
DSP_VectorAutocorr16 Computes the Autocorrelation of a Vector.
DSP_VectorBexp16 Computes the maximum binary exponent of a vector.
DSP_VectorBexp32 Computes the maximum binary exponent of a vector.
DSP_VectorChkEqu32 Compares two input vectors, returns an integer '1' if equal, and '0' if not equal.
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DSP_VectorCopy Copies the elements of one vector to another.
DSP_VectorCopyReverse32 Reverses the order of elements in one vector and copies them into another.
DSP_VectorDivC Divides the first N elements of inVector by a constant divisor, and stores the result
in outVector.
DSP_VectorDotp16 Computes the dot product of two vectors, and scales the output by a binary factor.
DSP_VectorDotp32 Computes the dot product of two vectors, and scales the output by a binary factor
DSP_VectorExp Computes the EXP (e^x) of the first N elements of inVector, and stores the result
in outVector.
DSP_VectorFill Fills an input vector with scalar data.
DSP_VectorLn Computes the Natural Log, Ln(x), of the first N elements of inVector, and stores
the result in outVector.
DSP_VectorLog10 Computes the Log10(x), of the first N elements of inVector, and stores the result in
outVector.
DSP_VectorLog2 Computes the Log2(x) of the first N elements of inVector, and stores the result in
outVector.
DSP_VectorMax32 Returns the maximum value of a vector.
DSP_VectorMaxIndex32 Returns the index of the maximum value of a vector.
DSP_VectorMean32 Calculates the mean average of an input vector.
DSP_VectorMin32 Returns the minimum value of a vector.
DSP_VectorMinIndex32 Returns the index of the minimum value of a vector.
DSP_VectorMul16 Multiplication of a series of numbers in one vector to another vector.
DSP_VectorMul32 Multiplication of a series of numbers in one vector to another vector.
DSP_VectorMulc16 Multiplication of a series of numbers in one vector to a scalar value.
DSP_VectorMulc32 Multiplication of a series of numbers in one vector to a scalar value.
DSP_VectorNegate Inverses the sign (negates) the elements of a vector.
DSP_VectorRecip Computes the reciprocal (1/x) of the first N elements of inVector, and stores the
result in outVector.
DSP_VectorRMS16 Computes the root mean square (RMS) value of a vector.
DSP_VectorShift Shifts the data index of an input data vector.
DSP_VectorSqrt Computes the square root of the first N elements of inVector, and stores the result
in outVector.
DSP_VectorStdDev16 Computes the Standard Deviation of a Vector.
DSP_VectorSub16 Calculate the difference of two vectors.
DSP_VectorSub32 Calculate the difference of two vectors.
DSP_VectorSumSquares16 Computes the sum of squares of a vector, and scales the output by a binary factor.
DSP_VectorSumSquares32 Computes the sum of squares of a vector, and scales the output by a binary factor.
DSP_VectorVari16 Computes the variance of N elements of a Vector.
DSP_VectorVariance Computes the variance of N elements of inVector.
DSP_VectorZeroPad Fills an input vector with zeros.
Description
This section describes the Application Programming Interface (API) functions of the DSP Fixed-Point Library.
Refer to each section for a detailed description.
5.4.1.5.1 Complex Math Functions
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5.4.1.5.1.1 DSP_ComplexAdd32 Function
C
void DSP_ComplexAdd32(
int32c * indata1,
int32c * indata2,
int32c * Output
);
Description
Function DSP_ComplexAdd32:
void DSP_ComplexAdd32(int32c *indata1, int32c *indata2, int32c *Output);
Calculates the sum of two complex numbers, indata1 and indata2, and stores the complex result in Output. Complex numbers
must be in the structural form that includes real and imaginary components. The function saturates the output values if maximum
or minimum are exceeded. All values are in Q31 fractional data format. (a + bi) + (c + di) => (a + c) + (b + d)i
Preconditions
Complex numbers must be in the int32c format.
Parameters
Parameters Description
indata1 pointer to input complex number (int32c)
indata2 pointer to input complex number (int32c)
Returns
pointer to result complex numbers (int32c)
None.
Remarks
None.
Example
int32c *res, result;
int32c *input1, *input2;
int32c test_complex_1 = {0x40000000,0x0CCCCCCC};
// (0.5 + 0.1i)
int32c test_complex_2 = {0x73333333,0xB3333334};
// (0.9 - 0.6i)
res=&result;
input1=&test_complex_1;
input2=&test_complex_2;
DSP_ComplexAdd32(input1, input2, res);
// result = {0x73333333, 0xC0000000} = (0.9 - 0.5i)
5.4.1.5.1.2 DSP_ComplexConj16 Function
C
void DSP_ComplexConj16(
int16c * indata,
int16c * Output
);
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Description
DSP_ComplexConj16:
void DSP_ComplexConj16(int16c *indata, int16c *Output);
CCalculates the complex conjugate of Indata, and stores the result in Outdata. Both numbers must be in the complex number
data structure which includes real and imaginary components. Values are in Q15 fractional data format. The function will saturate
the output if maximum or minimum values are exceeded. (a + bi) => (a - bi)
Preconditions
Complex numbers must be in the int32c format.
Parameters
Parameters Description
indata pointer to input complex number (int16c)
Returns
pointer to result complex numbers (int16c)
None.
Remarks
None.
Example
int16c *res, result;
int16c *input1;
int16c test_complex_1 = {0x4000,0x0CCC};
// (0.5 + 0.1i)
res=&result;
input1=&test_complex_1;
DSP_ComplexConj16(input1, res);
// result = {0x4000, 0xF334} = (0.5 - 0.1i)
5.4.1.5.1.3 DSP_ComplexConj32 Function
C
void DSP_ComplexConj32(
int32c * indata,
int32c * Output
);
Description
Function DSP_ComplexConj32:
void DSP_ComplexConj32(int32c *indata, int32c *Output);
Calculates the complex conjugate of indata, and stores the result in Output. Both numbers must be in the complex number data
structure, which includes real and imaginary components. Values are in Q31 fractional data format. The function will saturate the
output if maximum or minimum values are exceeded. (a + bi) => (a - bi)
Preconditions
Complex numbers must be in the int32c format.
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Parameters
Parameters Description
indata1 pointer to input complex number (int32c)
Returns
pointer to result complex numbers (int32c)
None.
Remarks
None.
Example
int32c *res, result;
int32c *input1;
int32c test_complex_1 = {0x40000000,0x0CCCCCCC};
// (0.5 + 0.1i)
res=&result;
input1=&test_complex_1;
DSP_ComplexConj32(input1, res);
// result = {0x40000000, 0xF3333334} = (0.5 - 0.1i)
5.4.1.5.1.4 DSP_ComplexDotProd32 Function
C
void DSP_ComplexDotProd32(
int32c * indata1,
int32c * indata2,
int32c * Output
);
Description
Function DSP_ComplexDotProd32:
void DSP_ComplexDotProd32(int32c *indata1, int32c *indata2, int32c *Output);
Calculates the dot product of two complex numbers, indata1 and indata2, and stores the result in Output. All numbers must be in
complex structural format that includes real and imaginary components, and the numbers are in fractional Q31 format. The
function will saturate the output if it exceeds maximum or minimum ratings. The formula for the dot product is as follows:
Output(real) = (Input1.re * Input2.re) + (Input1.im * Input2.im); Output(img) = [(Input1.re * Input2.im) - (Input1.im * Input2.re)]i (a +
bi) dot (c + di) => (a * c + b * d) + (a * d - b * c)i
Preconditions
Complex numbers must be in the int32c format.
Parameters
Parameters Description
indata1 pointer to input complex number (int32c)
indata2 pointer to input complex number (int32c)
Returns
pointer to result complex numbers (int32c)
None.
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Remarks
None.
Example
int32c *res, result;
int32c *input1, *input2;
int32c test_complex_1 = {0x40000000,0x0CCCCCCC};
// (0.5 + 0.1i)
int32c test_complex_2 = {0x73333333,0xB3333334};
// (0.9 - 0.6i)
res=&result;
input1=&test_complex_1;
input2=&test_complex_2;
DSP_ComplexDotProd32(input1, input2, res);
// result = {0x31EB851E, 0xCE147AE3} = (0.39 - 0.39i)
5.4.1.5.1.5 DSP_ComplexMult32 Function
C
void DSP_ComplexMult32(
int32c * indata1,
int32c * indata2,
int32c * Output
);
Description
Function DSP_ComplexMult32:
void DSP_ComplexMult32(int32c *indata1, int32c *indata2, int32c *Output);
Multiplies two complex numbers, indata1 and indata2, and stores the complex result in Output. All numbers must be in the int32c
complex data structure. All data is in Q31 fractional format. The function will saturate if maximum or minimum values are
exceeded. Output(real) = (Input1.re * Input2.re) - (Input1.im * Input2.im); Output(img) = [(Input1.re * Input2.im) + (Input1.im *
Input2.re)]i (a + bi) x (c + di) => (a * c - b * d) + (a * d + b * c)i
Preconditions
Complex numbers must be in the int32c format.
Parameters
Parameters Description
indata1 pointer to input complex number (int32c)
indata2 pointer to input complex number (int32c)
Returns
pointer to result complex numbers (int32c)
None.
Remarks
None.
Example
int32c *res, result;
int32c *input1, *input2;
int32c test_complex_1 = {0x40000000,0x0CCCCCCC};
// (0.5 + 0.1i)
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int32c test_complex_2 = {0x73333333,0xB3333334};
// (0.9 - 0.6i)
res=&result;
input1=&test_complex_1;
input2=&test_complex_2;
DSP_ComplexMult32(input1, input2, res);
// result = {0x4147AE14, 0xE51EB8551} = (0.51 - 0.21i)
5.4.1.5.1.6 DSP_ComplexScalarMult32 Function
C
void DSP_ComplexScalarMult32(
int32c * indata,
int32_t Scalar,
int32c * Output
);
Description
Function DSP_ComplexScalarMult32:
void DSP_ComplexScalarMult32(int32c *indata, int32_t Scalar, int32c *Output);
Multiplies a complex number, indata, by a scalar number, Scalar, and stores the result in Output. indata and Output must be in
int32c structure with real and imaginary components. All data must be in the fractional Q31 format. The function will saturate if
maximum or minimum values are exceeded. Output(real) = (Input1.re * Scalar); Output(img) = [(Input1.im * Scalar)]i (a + bi) * C
=> (a * C + b * Ci)
Preconditions
Complex numbers must be in the int32c format.
Parameters
Parameters Description
indata pointer to input complex number (int32c)
Scalar fractional scalar input value (int32_t)
Returns
pointer to result complex numbers (int32c)
None.
Remarks
None.
Example
int32c *res, result;
int32c *input1;
int32_t scalarInput = 0x20000000; // 0.25
int32c test_complex_1 = {0x40000000,0x0CCCCCCC};
// (0.5 + 0.1i)
res=&result;
input1=&test_complex_1;
DSP_ComplexScalarMult32(input1, scalarInput, res);
// result = {0x10000000, 0x03333333} = (0.125 + 0.025i)
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5.4.1.5.1.7 DSP_ComplexSub32 Function
C
void DSP_ComplexSub32(
int32c * indata1,
int32c * indata2,
int32c * Output
);
Description
Function DSP_ComplexSub32:
void DSP_ComplexSub32(int32c *indata1, int32c *indata2, int32c *Output);
Calculates the difference of two complex numbers, indata1 less indata2, and stores the complex result in Output. Both numbers
must be in a complex data structure, which includes real and imaginary components. The function saturates the output values if
maximum or minimum are exceeded. Real and imaginary components are in the Q31 fractional data format. (a + bi) - (c + di) =>
(a - c) + (b - d)i
Preconditions
Complex numbers must be in the int32c format.
Parameters
Parameters Description
indata1 pointer to input complex number (int32c)
indata2 pointer to input complex number (int32c)
Returns
pointer to result complex numbers (int32c)
None.
Remarks
None.
Example
int32c *res, result;
int32c *input1, *input2;
int32c test_complex_1 = {0x40000000,0x0CCCCCCC};
// (0.5 + 0.1i)
int32c test_complex_2 = {0x73333333,0xB3333334};
// (0.9 - 0.6i)
res=&result;
input1=&test_complex_1;
input2=&test_complex_2;
DSP_ComplexSub32(input1, input2, res);
// result = {0xCCCCCCCD, 0x59999998} = (-0.4 + 0.7i)
5.4.1.5.2 Digital Filter Functions
5.4.1.5.2.1 DSP_FilterFIR32 Function
C
void DSP_FilterFIR32(
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int32_t * outdata,
int32_t * indata,
int32_t * coeffs2x,
int32_t * delayline,
int N,
int K,
int scale
);
Description
Function DSP_FilterFIR32:
void DSP_FilterFIR32(int32_t *outdata, int32_t *indata, int32_t *coeffs2x, int32_t *delayline, int N, int K, int scale);
Performs an FIR filter on the vector indata, and stores the output in the vector outdata. The number of samples processed in the
array is given by N. The number of filter taps is given by K. The values are scaled upon input by the binary scaling factor (right
shift), scale. The array of 2*K coefficients is contained in the array coeffs2x, where the values are in order b0, b1, b2... and
repeated. Lastly the delayline is an array of K values that are initialized to zero and represent previous values. All values are in
fractional Q31 data format. The function will saturate results if minimum or maximum values are exceeded.
Preconditions
The pointers outdata and indata must be aligned on 4-byte boundaries. N must be greater than or equal to four and a multiple of
four. K must be greater than 2 and a multiple of 2. delayline must have K elements, and be initialized to zero. coeffs2x must have
2*K elements.
Parameters
Parameters Description
outdata pointer to destination array of elements (int32_t)
indata pointer to source array of elements (int32_t)
coeffs2x pointer to an array of coefficients (int32_t)
delayline pointer to an array of delay variables (int32_t)
N number of points in the array to process (int) number of samples (int)
K number of filter taps
scale binary scaler divisor (1 / 2^scale) (int)
Returns
None.
Remarks
Filter coefs must be repeated within the array. The array is twice as large as the number of taps, and the values are repeated in
order b0, b1, b2,...bn, b0, b1, b2,... bn. The function updates the delayline array, which must be K elements long. The array
should be initialized to zero prior to the first processing. It will contain values for processing cascaded filters within a loop.
Example
#define TAPS 4
#define numPOINTS 256
int filterN = numPOINTS;
int filterK = TAPS;
int filterScale = 1; // scale output by 1/2^1 => output * 0.5
int32_t FilterCoefs[TAPS*2] = {0x40000000, 0x20000000, 0x20000000, 0x20000000,
0x40000000, 0x20000000, 0x20000000, 0x20000000};
// note repeated filter coefs, A B C D A B C D
// 0.5, 0.25, 0.25, 0.25, 0.5, 0.25, 0.25, 0.25
int32_t outFilterData[numPOINTS]={0};
int32_t inFilterData[numPOINTS];
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int filterDelayLine[TAPS]={0};
while(true)
{
// put some data into input array, inFilterData, here //
DSP_FilterFIR32(outFilterData, inFilterData, FilterCoefs, filterDelayLine,
filterN, filterK, filterScale);
}
5.4.1.5.2.2 DSP_FilterFIRDecim32 Function
C
void DSP_FilterFIRDecim32(
int32_t * outdata,
int32_t * indata,
int32_t * coeffs,
int32_t * delayline,
int N,
int K,
int scale,
int rate
);
Description
Function DSP_FilterFIRDecim32:
void DSP_FilterFIRDecim32(int32_t *outdata, int32_t *indata, int32_t *coeffs, int32_t *delayline, int N, int K, int scale, int rate);
Compute a FIR decimation filter on the input vector indata, and store the results to the vector outdata. The total number of output
elements is set by N, and therefore the outdata array must be at least N in length. The decimation ratio is given by rate. The
input is sampled every integer value of rate, skipping every (rate-1) input samples. The input array must therefore be (rate*N)
samples long. The amount of filter taps is specified by K. Coeffs specifies the coefficients array. The delayline array holds delay
inputs for calculation, and must be initialized to zero prior to calling the filter. Both coeffs and delayline must be K in length. Scale
divides the input by a scaling factor by right shifting the number of bits (1/2^scale). All values of input, output, and coeffs are
given in Q31 fractional data format. The function will saturate if the output value exceeds the maximum or minmum value.
Y = b0 * X0 + (b1 * X(-1)) + (b2 * X(-2)
Preconditions
The pointers outdata and indata must be aligned on 4-byte boundaries. delayline must have K elements, and be initialized to
zero. coeffs must have K elements. outdata must have N elements indata must have (N*rate) elements
Parameters
Parameters Description
outdata pointer to output array of elements (int32_t)
indata pointer to input array of elements (int32_t)
coeffs pointer to an array of coefficients (int32_t)
delayline pointer to an array of delay variables (int32_t)
N number of output elements to be processed (int)
K number of filter taps and coeffs (int)
scale binary scaler divisor (1 / 2^scale) (int)
rate decimation ratio (int)
Returns
None.
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Remarks
Coefs are loaded into the arry with corresponding to the least delay first (C0, C(-1), C(-2)). K must be greater than rate. Even
while decimating the input stream, every input passes through the delayline. So FIR filters of arbitrary length will give the same
output as a non-decimating FIR, just with fewer responses.
Example
#define N 8 // number of output samples
#define TAPS 5
#define SKIP 3
int testFilterN = N; // number of output elements
int testFilterK = TAPS; // number of taps
int testFilterRate = SKIP; // decimation rate R
int32_t outFiltDataDec[N]={0};
int32_t *inTestFilter[N*SKIP];
int filtScaleNum = 1; // scale output (1 /2^n) => Y * 0.5
int32_t filtDelayTest[8]={0}; // always initialize to zero
// get pointer to input buffer here //
inTestFilter = &inputBuffer;
DSP_FilterFIRDecim32(outFiltDataDec, inTestFilter, inTestCoefs,
filtDelayTest, testFilterN, testFilterK, filtScaleNum, testFilterRate);
5.4.1.5.2.3 DSP_FilterFIRInterp32 Function
C
void DSP_FilterFIRInterp32(
int32_t * outdata,
int32_t * indata,
int32_t * coeffs,
int32_t * delayline,
int N,
int K,
int scale,
int rate
);
Description
Function DSP_FilterFIRInterp32:
void DSP_FilterFIRInterp32(int32_t *outdata, int32_t *indata, int32_t *coeffs, int32_t *delayline, int N, int K, int scale, int rate);
Perform an interpolating FIR filter on the first N samples of indata, and stores the result in outdata. The number of output
elements is N*rate. The number of filter taps, K, must be an even multiple of N. The coefficients array, Coeffs, must be K
elements long. The delay line array, delayline, must be K/R elements long, and be initialzed to zero. All data elements must be in
Q31 fractional data format. Scaling is performed via binary shift on the input equvalent to (1/2^shift). The function will saturate
the output if it exceeds maximum or minimum values. The function creates R output values for each input value processed. The
delayline of previous values is processed with R elements of the coefficient array. Numerically:
Y(1,0) = X(0)*C(0) + X(-1)*C(rate) + X(-2)*C(2*rate) ... Y(1,1) = X(0)*C(1) + X(-1)*C(rate+1) + X(-2)*C(2*rate + 1) ... Y(1,rate) =
X(0)*C(N) + X(-1)*C(rate+N) + X(-2)*C(2*rate + N) ...
where output Y corresponds to (input,rate) different outputs, input X has (M/rate) sample delays and C is the coefficient array.
Preconditions
The pointers outdata and indata must be aligned on 4-byte boundaries. delayline must have (K/R) elements, and be initialized to
zero. K (taps) must be an even multiple of R (rate). outdata must have R*N elements.
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Parameters
Parameters Description
outdata pointer to output array of elements (int32_t)
indata pointer to input array of elements (int32_t)
coeffs pointer to an array of coefficients (int32_t)
delayline pointer to an array of delay variables (int32_t)
N number of output elements to be processed (int)
K number of filter taps and coeffs (int)
scale binary scaler divisor (1 / 2^scale) (int)
rate decimation ratio (int)
Returns
None.
Remarks
The function processes each input (rate) times. With each pass, coefficients are offset so that (K/rate) multiply accumulate cycles
occur.
Example
// interpret evenly 1/3 spaced values
#define N 4 // number of output samples
#define TAPS 6
#define INTERP 3
int ifiltN = N;
int ifiltK = TAPS; // k must be an even multiple of R
int ifiltR = INTERP;
int32_t ifiltOut[N*INTERP]={0};
int32_t ifiltDelay[2]={0}; // must be initialized to zero
int ifiltScale = 0; // no scaling
int32_t ifiltCoefsThirds[TAPS]={0x2AAAAAA9, 0x55555555,0x7FFFFFFE,
0x55555555,0x2AAAAAA9,0x00000000};
// 0.333333, 0.6666667, 0.99999999, 0.6666667, 0.33333333, 0
int32_t ifiltInput[N]={0x0CCCCCCD, 0x19999999, 0x26666666, 0x33333333};
// 0.1, 0.2, 0.3, 0.4
DSP_FilterFIRInterp32(ifiltOut, ifiltInput, ifiltCoefsThirds, ifiltDelay,
ifiltN, ifiltK, ifiltScale, ifiltR);
// ifiltOut = {0x04444444, 0x08888889, 0x0CCCCCCD, 0x11111111, 0x15555555, 0x19999999,
// 0x1DDDDDDD, 0x22222221, 0x26666665, 0x2AAAAAAA,0x2EEEEEEE, 0x33333332}
// = 0.0333, 0.0667, 0.1, 0.1333, 0.1667, 0.2, 0.2333, 0.2667, 0.3, 0.3333, 0.3667, 0.4
5.4.1.5.2.4 DSP_FilterIIR16 Function
C
int16_t DSP_FilterIIR16(
int16_t in,
int16_t * coeffs,
int16_t * delayline,
int B,
int scale
);
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Description
Function DSP_FilterIIR16:
int16_t DSP_FilterIIR16(int16_t in, int16_t *coeffs, int16_t *delayline, int B, int scale);
Performs a single element cascaded biquad IIR filter on the input, in. The filter contains B number of biquad sections, and
cascades the output of one to the input of the next. B must be greater than 2 and a multiple of 2. The int16_t output generated by
the function is the computation from the final biquad stage. Delay pipeline array delayline must contain 2*B values and be
initialized to zero prior to use. The coefficient array must contain 4*B elments, and must be set up in order of biquad a1, a2, b1,
b2. A binary (right shift) factor, scale, will scale the output equivalent to (1/2^scale). All numerical values must be in Q15
fractional data format. The function will saturate values if maximum or minimum values are exceeded.
Y = X0 + (b1 * X(-1)) + (b2 * X(-2) + (a1 * Y(-1)) + (a2 * Y(-2))
Preconditions
The pointers outdata and indata must be aligned on 4-byte boundaries. B must be greater than 2 and a multiple of 2. delayline
must have 2*B elements, and be initialized to zero. coeffs must have 4*B elements.
Parameters
Parameters Description
in input data element X (int16_t)
coeffs pointer to an array of coefficients (int16_t)
delayline pointer to an array of delay variables (int16_t)
B number of cascaded biquad filter groups to process (int)
scale binary scaler divisor (1 / 2^scale) (int)
Returns
Sample output Y (int16_t)
Example
#define B 8 // use * biquad filters in cascade
int dataSamples = 256;
int i, j;
biquad16 bquad[B];
int16_t coefs[4*B]= {0};
int16_t delaylines[2*B]= {0};
int16_t Y, X;
int scaleBquad = 1; // scale output (1 /2^n) => Y * 0.5
// do something to set up coefs, for instance this example //
for (j=0; jRemarks:Filter coefs must be stored within the array as a1, a2, b1, b2, a1, a2, b1,
b2, in order of biquads form input to output. A function to translate the coeffs from biquad
structure to coeffs is available in DSP_FilterIIRSetup16. The function updates the delayline
array, which must be 2*B elements long. The array should be initialized to zero prior to the
first processing. It will contain values for processing cascaded filters within a loop.
5.4.1.5.2.5 DSP_FilterIIRBQ16 Function
C
int16_t DSP_FilterIIRBQ16(
int16_t Xin,
PARM_EQUAL_FILTER * pFilter
);
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Description
Function DSP_FilterIIRBQ16:
int16_t DSP_FilterIIRBQ16(int16_t Xin, PARM_EQUAL_FILTER *pFilter);
Calculates a single pass IIR biquad filter on Xin, and delivers the result as a 16-bit output. All math is performed using 32 bit
instructions, with results truncated to 16-bits for the output. The delay register is stored as a 32-bit value for subsequent
functions. All values are fractional Q15 and Q31, see data structure for specifics.
Y = X(0)*b0 + (b1 * X(-1)) + (b2 * X(-2)) - (a1 * Y(-1)) - (a2 * Y(-2))
Preconditions
Delay register values should be initialized to zero.
Parameters
Parameters Description
Xin input data element X (int16_t)
pFilter pointer to filter coef and delay structure
Returns
Sample output Y (int16_t)
Remarks
The delay register values should be initialized to zero prior to the first call to the function, they are updated each pass. A gain of
2 has been hard coded into the function. This implies that all coefs should be input at half value. This is purposeful, since many
filter designs need a div2 to have each coef between the required -1
Example
PARM_EQUAL_FILTER *ptrFilterEQ;
PARM_EQUAL_FILTER FilterEQ;
uint16_t DataIn, DataOut;
ptrFilterEQ = &FilterEQ;
// 48KHz sampling; 1 KHz bandpass filter; Q=0.9
// divide by 2 and convert to Q15
// b0 = 0.06761171785499065
// b1 = 0
// b2 = -0.06761171785499065
// a1 = -1.848823142275648
// a2 = 0.8647765642900187
// note all coefs are half value of original design, gain handled in algorithm
ptrFiltEQ32->b[0]=0x0453; // feed forward b0 coef
ptrFiltEQ32->b[1]=0; // feed forward b1 coef
ptrFiltEQ32->b[2]=0xFBAD; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
ptrFiltEQ32->a[0]=0x89AD; // feedback a1 coef
ptrFiltEQ32->a[1]=0x3758; // feedback a2 coef
for (i=0;i<256;i++)
{
// *** get some input data here
DataIn32 = three_hundred_hz[i];
DataOut = DSP_FilterIIRBQ16(DataIn, ptrFilterEQ);
// *** do something with the DataOut here
}
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5.4.1.5.2.6 DSP_FilterIIRBQ16_cascade8 Function
C
int16_t DSP_FilterIIRBQ16_cascade8(
int16_t Xin,
PARM_EQUAL_FILTER * pFilter_Array
);
Description
Function DSP_FilterIIRBQ16_cascade8:
int16_t DSP_FilterIIRBQ16_cascade8(int16_t Xin, PARM_EQUAL_FILTER *pFilter_Array);
Calculates a single pass IIR biquad cascade filter on Xin, and delivers the result as a 16-bit output. The cascade of filters is 8
unique biquad filters arranged in series such that the output of one is provided as the input to the next. A unique filter coefficient
set is provided to each, and 32 bit delay lines are maintained for each. All math is performed using 32 bit instructions, which
results truncated to 16-bits for the output. Global gain values are available on the output. Fracgain is a Q15 fractional gain value
and expgain is a binary shift gain value. The combination of the two can be utilized to normalize the output as desired. All values
are fractional Q15 and Q31, see data structure for specifics.
Y = Y7 <- Y6 <- Y5 <- Y4 <- Y3 <- Y2 <- Y1 <- Y0 where each Yn filter element represents a unique IIR biquad: Yn = Y(n-1)*b0 +
(b1 * Y(n-2)) + (b2 * Y(n-3)) - (a1 * Yn(-1)) - (a2 * Yn(-2)) and: for Y0; Y(n-1) = Xin(0)
Preconditions
Delay register values should be initialized to zero.
Parameters
Parameters Description
Xin input data element X (int16_t)
pFilter pointer to filter coef and delay structure
Returns
Sample output Y (int16_t)
Remarks
The delay register values should be initialized to zero prior to the first call to the function, they are updated each pass. A gain of
2 has been hard coded into the function. This implies that all coefs should be input at half value. This is purposeful, since many
filter designs need a div2 to have each coef between the required -1
Example
PARM_EQUAL_FILTER filtArray[8];
uint16_t dataY, dataX;
// example to use 2 filter blocks as notch filters
// fill entire Filter Array with coefs
for (i=0;i<8;i++)
{
filtArray[i].Z[0]=0;
filtArray[i].Z[1]=0;
// note all coefs are half value of original design, gain handled in algorithm
// all pass
filtArray[i].b[0]=0x4000;
filtArray[i].b[1]=0; // feed forward b1 coef
filtArray[i].b[2]=0; // feed forward b2 coef
filtArray[i].a[0]=0; // feedback a1 coef
filtArray[i].a[1]=0; // feedback a2 coef
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}
// Unique filters for example
// 10KHz notch filter -- divide coefs by 2
b0 = 0.5883783602332997
b1 = -0.17124071441396285
b2 = 0.5883783602332997
a1 = -0.17124071441396285
a2 = 0.1767567204665992
// note all coefs are half value of original design, gain handled in algorithm
filtArray[3].b[0]=0x25a7; // feed forward b0 coef
filtArray[3].b[1]=0xf508; // feed forward b1 coef
filtArray[3].b[2]=0x25a7; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
filtArray[3].a[0]=0xf508; // feedback a1 coef
filtArray[3].a[1]=0x0b4f; // feedback a2 coef
// 1 KHz notch filter -- divide coefs by 2
b0 = 0.9087554064944908
b1 = -1.7990948352036205
b2 = 0.9087554064944908
a1 = -1.7990948352036205
a2 = 0.8175108129889816
// note all coefs are half value of original design, gain handled in algorithm
filtArray[7].b[0]=0x3a29; // feed forward b0 coef
filtArray[7].b[1]=0x8cdc; // feed forward b1 coef
filtArray[7].b[2]=0x3a29; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
filtArray[7].a[0]=0x8cdc; // feedback a1 coef
filtArray[7].a[1]=0x3452; // feedback a2 coef
for (i=0;i<256;i++)
{
// *** get input data here
dataX = compound_300_1K_hz16[i];
dataY = DSP_FilterIIRBQ16_cascade8(dataX, filtArray);
// *** do something with the DataY here
}
5.4.1.5.2.7 DSP_FilterIIRBQ16_cascade8_fast Function
C
int16_t DSP_FilterIIRBQ16_cascade8_fast(
int16_t Xin,
PARM_EQUAL_FILTER_16 * pFilter_Array
);
Description
Function DSP_FilterIIRBQ16_cascade8_fast:
int16_t DSP_FilterIIRBQ16_cascade8_fast(int16_t Xin, PARM_EQUAL_FILTER_16 *pFilter_Array);
Calculates a single pass IIR biquad cascade filter on Xin, and delivers the result as a 16-bit output. The cascade of filters is 8
unique biquad filters arranged in series such that the output of one is provided as the input to the next. A unique filter coefficient
set is provided to each, and 16 bit delay lines are maintained for each. All math is performed using 16 bit instructions, which
results rounded to 16-bits for the output. All values are fractional Q15, see data structure for specifics. The function will saturate
the output should it exceed maximum or minimum values.
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Y = Y7 <- Y6 <- Y5 <- Y4 <- Y3 <- Y2 <- Y1 <- Y0 where each Yn filter element represents a unique IIR biquad: Yn = Y(n-1)*b0 +
(b1 * Y(n-2)) + (b2 * Y(n-3)) - (a1 * Yn(-1)) - (a2 * Yn(-2)) and: for Y0; Y(n-1) = Xin(0)
Preconditions
Delay register values should be initialized to zero.
Parameters
Parameters Description
Xin input data element X (int16_t)
pFilter pointer to filter coef and delay structure
Returns
Sample output Y (int16_t)
Remarks
The delay register values should be initialized to zero prior to the first call to the function, they are updated each pass. A gain of
2 has been hard coded into the function. This implies that all coefs should be input at half value. This is purposeful, since many
filter designs need a div2 to have each coef between the required -1
Example
PARM_EQUAL_FILTER_16 filtArray[8];
uint16_t dataY, dataX;
// example to use 2 filter blocks as notch filters
// fill entire Filter Array with coefs
for (i=0;i<8;i++)
{
filtArray[i].Z[0]=0;
filtArray[i].Z[1]=0;
// note all coefs are half value of original design, gain handled in algorithm
// all pass
filtArray[i].b[0]=0x4000;
filtArray[i].b[1]=0; // feed forward b1 coef
filtArray[i].b[2]=0; // feed forward b2 coef
filtArray[i].a[0]=0; // feedback a1 coef
filtArray[i].a[1]=0; // feedback a2 coef
}
// Unique filters for example
// 10KHz notch filter -- divide coefs by 2
b0 = 0.5883783602332997
b1 = -0.17124071441396285
b2 = 0.5883783602332997
a1 = -0.17124071441396285
a2 = 0.1767567204665992
// note all coefs are half value of original design, gain handled in algorithm
filtArray[3].b[0]=0x25a7; // feed forward b0 coef
filtArray[3].b[1]=0xf508; // feed forward b1 coef
filtArray[3].b[2]=0x25a7; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
filtArray[3].a[0]=0xf508; // feedback a1 coef
filtArray[3].a[1]=0x0b4f; // feedback a2 coef
// 1 KHz notch filter -- divide coefs by 2
b0 = 0.9087554064944908
b1 = -1.7990948352036205
b2 = 0.9087554064944908
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a1 = -1.7990948352036205
a2 = 0.8175108129889816
// note all coefs are half value of original design, gain handled in algorithm
filtArray[7].b[0]=0x3a29; // feed forward b0 coef
filtArray[7].b[1]=0x8cdc; // feed forward b1 coef
filtArray[7].b[2]=0x3a29; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
filtArray[7].a[0]=0x8cdc; // feedback a1 coef
filtArray[7].a[1]=0x3452; // feedback a2 coef
for (i=0;i<256;i++)
{
// *** get input data here
dataX = compound_300_1K_hz16[i];
dataY = DSP_FilterIIRBQ16_cascade8_fast(dataX, filtArray);
// *** do something with the DataY here
}
5.4.1.5.2.8 DSP_FilterIIRBQ16_fast Function
C
int16_t DSP_FilterIIRBQ16_fast(
int16_t Xin,
PARM_EQUAL_FILTER_16 * pFilter
);
Description
Function DSP_FilterIIRBQ16_fast:
int16_t DSP_FilterIIRBQ16_fast(int16_t Xin, PARM_EQUAL_FILTER_16 *pFilter);
Calculates a single pass IIR biquad filter on Xin, and delivers the result as a 16-bit output. All math is performed using 16 bit
instructions, with results rounded to 16-bits for the output. The delay register is stored as a 16-bit value for subsequent functions.
The function will saturate the results if maximum or minimum fractional values are exceeded. All values are fractional Q15 format.
Y = X(0)*b0 + (b1 * X(-1)) + (b2 * X(-2)) - (a1 * Y(-1)) - (a2 * Y(-2))
Preconditions
Delay register values should be initialized to zero.
Parameters
Parameters Description
Xin input data element X (int16_t)
pFilter pointer to filter coef and delay structure
Returns
Sample output Y (int16_t)
Remarks
The delay register values should be initialized to zero prior to the first call to the function, they are updated each pass. A gain of
2 has been hard coded into the function. This implies that all coefs should be input at half value. This is purposeful, since many
filter designs need a div2 to have each coef between the required -1
Example
PARM_EQUAL_FILTER_16 *ptrFilterEQ;
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PARM_EQUAL_FILTER_16 FilterEQ;
uint16_t DataIn, DataOut;
ptrFilterEQ = &FilterEQ;
// 48KHz sampling; 1 KHz bandpass filter; Q=0.9
// divide by 2 and convert to Q15
// b0 = 0.06761171785499065
// b1 = 0
// b2 = -0.06761171785499065
// a1 = -1.848823142275648
// a2 = 0.8647765642900187
// note all coefs are half value of original design, gain handled in algorithm
ptrFiltEQ32->b[0]=0x0453; // feed forward b0 coef
ptrFiltEQ32->b[1]=0; // feed forward b1 coef
ptrFiltEQ32->b[2]=0xFBAD; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
ptrFiltEQ32->a[0]=0x89AD; // feedback a1 coef
ptrFiltEQ32->a[1]=0x3758; // feedback a2 coef
for (i=0;i<256;i++)
{
// *** get some input data here
DataIn32 = three_hundred_hz[i];
DataOut = DSP_FilterIIRBQ16_fast(DataIn, ptrFilterEQ);
// *** do something with the DataOut here
}
5.4.1.5.2.9 DSP_FilterIIRBQ16_parallel8 Function
C
int16_t DSP_FilterIIRBQ16_parallel8(
int16_t Xin,
PARM_EQUAL_FILTER * pFilter
);
Description
Function DSP_FilterIIRBQ16_parallel8:
int16_t DSP_FilterIIRBQ16_parallel8(int16_t Xin, PARM_EQUAL_FILTER *pFilter);
Calculates a 8 parallel, single pass IIR biquad filters on Xin, sums the result and delivers the result as a 16-bit output. All math is
performed using 32 bit instructions, which results truncated to 16-bits for the output. The delay register is stored as a 32-bit value
for subsequent functions. Output is tuned by 2 multipier factors. First each parallel section has a fractional gain (attenuation) that
enables individual scaling of that section. Second, a global binary (log2N) gain is applied to the result. The combination of gain
factors enable both gain and attentuation. All values are fractional Q15 and Q31, see data structure for specifics.
Y = Y7/8 + Y6/8 + Y5/8 + Y4/8 + Y3/8 + Y2/8 + Y1/8 + Y0/8 where each Yn filter element represents a unique IIR biquad: Yn =
X(0)*b0 + (b1 * X(n-1)) + (b2 * X(n-2)) - (a1 * Yn(-1)) - (a2 * Yn(-2))
Preconditions
Delay register values should be initialized to zero. The sum of all fracgain should be <= 1
Parameters
Parameters Description
Xin input data element X (int16_t)
pFilter pointer to filter coef and delay structure
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Returns
Sample output Y (int16_t)
Remarks
The delay register values should be initialized to zero prior to the first call to the function, they are updated each pass. A gain of
2 has been hard coded into the function. This implies that all coefs should be input at half value. This is purposeful, since many
filter designs need a div2 to have each coef between the required -1
Example
PARM_EQUAL_FILTER filtArrayPara[8];
uint16_t dataY, dataX;
// fill entire Filter Array with coefs
for (i=0;i<8;i++)
{
filtArrayPara[i].Z[0]=0;
filtArrayPara[i].Z[1]=0;
filtArrayPara[i].G.fracGain = 0x7FFF; // gain = 1 default
filtArrayPara[i].G.expGain = 1; // == 2^N; gain of 2
// note all coefs are half value of original design, gain handled in algorithm
// none pass -- default
filtArrayPara[i].b[0]=0; // feed forward b0 coef
filtArrayPara[i].b[1]=0; // feed forward b1 coef
filtArrayPara[i].b[2]=0; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
filtArrayPara[i].a[0]=0; // feedback a1 coef
filtArrayPara[i].a[1]=0; // feedback a2 coef
}
// 1K bandpass Q=0.9
filtArrayPara[7].G.fracGain = 0x4000; // gain = 0.5 because using 2 outputs
// note all coefs are half value of original design, gain handled in algorithm
filtArrayPara[7].b[0]=0x04ad;
filtArrayPara[7].b[1]=0; // feed forward b1 coef
filtArrayPara[7].b[2]=0xfb53; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
filtArrayPara[7].a[0]=0x8a90; // feedback a1 coef
filtArrayPara[7].a[1]=0x36a4; // feedback a2 coef
// 300 Hz bandpass Q=0.9
filtArrayPara[6].G.fracGain = 0x1000; // gain = 0.125 as an example
// note all coefs are half value of original design, gain handled in algorithm
filtArrayPara[6].b[0]=0x017b; // feed forward b0 coef
filtArrayPara[6].b[1]=0; // feed forward b1 coef
filtArrayPara[6].b[2]=0xfe85; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
filtArrayPara[6].a[0]=0x8316; // feedback a1 coef
filtArrayPara[6].a[1]=0x3d08; // feedback a2 coef
for (i=0;i<256;i++)
{
// *** get input data here
dataX = compound_300_1K_hz16[i];
dataY = DSP_FilterIIRBQ16_cascade8_fast(dataX, filtArray);
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// *** do something with the DataY here
}
5.4.1.5.2.10 DSP_FilterIIRBQ16_parallel8_fast Function
C
int16_t DSP_FilterIIRBQ16_parallel8_fast(
int16_t Xin,
PARM_EQUAL_FILTER_16 * pFilter
);
Description
Function DSP_FilterIIRBQ16_parallel8_fast:
int16_t DSP_FilterIIRBQ16_parallel8_fast(int16_t Xin, PARM_EQUAL_FILTER_16 *pFilter);
Calculates a 8 parallel, single pass IIR biquad filters on Xin, sums the result and delivers the result as a 16-bit output. All math is
performed using 16 bit instructions, which results rounded to 16-bits for the output. The delay register is stored as a 16-bit value
for subsequent functions. Output is tuned by 2 multipier factors. First each parallel section has a fractional gain (attenuation) that
enables individual scaling of that section. Second, a global binary (log2N) gain is applied to the result. The combination of gain
factors enable both gain and attentuation. All values are fractional Q15. The function will round outputs and saturate if maximum
or minimum values are exceeded.
Y = Y7/8 + Y6/8 + Y5/8 + Y4/8 + Y3/8 + Y2/8 + Y1/8 + Y0/8 where each Yn filter element represents a unique IIR biquad: Yn =
X(0)*b0 + (b1 * X(n-1)) + (b2 * X(n-2)) - (a1 * Yn(-1)) - (a2 * Yn(-2))
Preconditions
Delay register values should be initialized to zero. The sum of all fracgain should be <= 1
Parameters
Parameters Description
Xin input data element X (int16_t)
pFilter pointer to filter coef and delay structure
Returns
Sample output Y (int16_t)
Remarks
The delay register values should be initialized to zero prior to the first call to the function, they are updated each pass. A gain of
2 has been hard coded into the function. This implies that all coefs should be input at half value. This is purposeful, since many
filter designs need a div2 to have each coef between the required -1
Example
PARM_EQUAL_FILTER_16 filtArrayPara[8]; // note change in data structure
uint16_t dataY, dataX;
// fill entire Filter Array with coefs
for (i=0;i<8;i++)
{
filtArrayPara[i].Z[0]=0;
filtArrayPara[i].Z[1]=0;
filtArrayPara[i].G.fracGain = 0x7FFF; // gain = 1 default
filtArrayPara[i].G.expGain = 1; // log2N; gain of 2
// note all coefs are half value of original design, gain handled in algorithm
// none pass -- default
filtArrayPara[i].b[0]=0; // feed forward b0 coef
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filtArrayPara[i].b[1]=0; // feed forward b1 coef
filtArrayPara[i].b[2]=0; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
filtArrayPara[i].a[0]=0; // feedback a1 coef
filtArrayPara[i].a[1]=0; // feedback a2 coef
}
// 1K bandpass Q=0.9
filtArrayPara[7].G.fracGain = 0x4000; // gain = 0.5 because using 2 outputs
// note all coefs are half value of original design, gain handled in algorithm
filtArrayPara[7].b[0]=0x04ad;
filtArrayPara[7].b[1]=0; // feed forward b1 coef
filtArrayPara[7].b[2]=0xfb53; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
filtArrayPara[7].a[0]=0x8a90; // feedback a1 coef
filtArrayPara[7].a[1]=0x36a4; // feedback a2 coef
// 300 Hz bandpass Q=0.9
filtArrayPara[6].G.fracGain = 0x1000; // gain = 0.125 as an example
// note all coefs are half value of original design, gain handled in algorithm
filtArrayPara[6].b[0]=0x017b; // feed forward b0 coef
filtArrayPara[6].b[1]=0; // feed forward b1 coef
filtArrayPara[6].b[2]=0xfe85; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
filtArrayPara[6].a[0]=0x8316; // feedback a1 coef
filtArrayPara[6].a[1]=0x3d08; // feedback a2 coef
for (i=0;i<256;i++)
{
// *** get input data here
dataX = compound_300_1K_hz16[i];
dataY = DSP_FilterIIRBQ16_cascade8_fast(dataX, filtArray);
// *** do something with the DataY here
}
5.4.1.5.2.11 DSP_FilterIIRBQ32 Function
C
int32_t DSP_FilterIIRBQ32(
int32_t Xin,
PARM_EQUAL_FILTER_32 * pFilter
);
Description
Function DSP_FilterIIRBQ32:
int32_t DSP_FilterIIRBQ32(int32_t Xin, PARM_EQUAL_FILTER_32 *pFilter);
Calculates a single pass IIR biquad filter on Xin, and delivers the result as a 16-bit output. All math is performed using 32 bit
instructions, with results truncated to 32-bits for the output. The delay register is stored as a 32-bit value for subsequent
functions. All values are fractional Q31, see data structure for specifics.
Y = X(0)*b0 + (b1 * X(-1)) + (b2 * X(-2)) - (a1 * Y(-1)) - (a2 * Y(-2))
Preconditions
Delay register values should be initialized to zero.
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Parameters
Parameters Description
Xin input data element X (int32_t)
pFilter pointer to high resolution filter coef and delay structure
Returns
Sample output Y (int32_t)
Remarks
The delay register values should be initialized to zero prior to the first call to the function, they are updated each pass. A gain of
2 has been hard coded into the function. This implies that all coefs should be input at half value. This is purposeful, since many
filter designs need a div2 to have each coef between the required -1
Example
PARM_EQUAL_FILTER_32 *ptrFiltEQ32;
PARM_EQUAL_FILTER_32 FilterEQ32;
int32_t DataIn32, DataOut32;
ptrFiltEQ32 = &FilterEQ32;
ptrFiltEQ32->Z[0]=0;
ptrFiltEQ32->Z[1]=0;
// 1000 Hz Q= 0.9 BP filter design, 44.1K sampling
//
// b0 = 0.07311778239751009 forward
// b1 = 0
// b2 = -0.07311778239751009
// a1 = -1.8349811166056893 back
// a2 = 0.8537644352049799
// note all coefs are half value of original design, gain handled in algorithm
ptrFiltEQ32->b[0]=0x04ADF635; // feed forward b0 coef
ptrFiltEQ32->b[1]=0; // feed forward b1 coef
ptrFiltEQ32->b[2]=0xFB5209CB; // feed forward b2 coef
// note all coefs are half value of original design, gain handled in algorithm
// note subtract is handled in algorithm, so coefs go in at actual value
ptrFiltEQ32->a[0]=0x8A8FAB5D; // feedback a1 coef
ptrFiltEQ32->a[1]=0x36A41395; // feedback a2 coef
for (i=0;i<256;i++)
{
// *** get input data here
DataIn32 = three_hundred_hz[i];
DataOut32 = DSP_FilterIIRBQ32(DataIn32, ptrFiltEQ32);
// *** do something with the DataOut32 here
}
5.4.1.5.2.12 DSP_FilterIIRSetup16 Function
C
void DSP_FilterIIRSetup16(
int16_t * coeffs,
biquad16 * bq,
int B
);
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Description
Function DSP_FilterIIRSetup16:
void DSP_FilterIIRSetup16(int16_t *coeffs, biquad16 *bq, int B);
Converts an array of biquad coefficients, bq, into an linear array of coefficients, coeffs. The output array must be 4*B elements
long. The number of biquads in the resulting factor is given by B. All numerical values must be in Q15 fractional data format.
Preconditions
coeffs must have 4*B elements.
Parameters
Parameters Description
coeffs pointer to an array of coefficients (int16_t)
bq pointer to array of biquad structure filter coefs (biquad16)
B number of cascaded biquad filter groups to process (int)
Returns
None.
Remarks
None.
Example
see DSP_FilterIIR16 for example.
5.4.1.5.2.13 DSP_FilterLMS16 Function
C
int16_t DSP_FilterLMS16(
int16_t in,
int16_t ref,
int16_t * coeffs,
int16_t * delayline,
int16_t * error,
int K,
int16_t mu
);
Description
Function DSP_FilterLMS16:
int16_t DSP_FilterLMS16(int16_t in, int16_t ref, int16_t *coeffs, int16_t *delayline, int16_t *error, int K, int16_t mu);
Computes an LMS adaptive filter on the input in. Filter output of the FIR is given as a 16 bit value. The filter target is ref, and the
calculation difference between the output and the target is error. The filter adapts its coefficients, coefs, on each pass. The
number of coefficients (filter taps) is given by the value K. The delayline array should be initialized to zero prior to calling the filter
for the first time, and have K elements. The value mu is the rate at which the filter adapts. All values are Q15 fractional numbers.
The function will saturate the output if it exceeds maximum or minimum values. The LMS will adapt its coefs to attempt to drive
the output value toward the ref value. The rate of adaption on each pass depends on mu and the error from the previous
calculation.
Preconditions
The pointers outdata and indata must be aligned on 4-byte boundaries. delayline must have (K) elements, and be initialized to
zero. K (taps) must be a multiple of 4, and >= 8. mu must be positive.
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Parameters
Parameters Description
in input data value (int16_t)
ref target output value (int16_t)
coeffs pointer to an array of coefficients (int16_t)
delayline pointer to an array of delay variables (int16_t)
error output minus reference (int16_t)
K number of filter taps and coeffs (int)
mu adaption rate (int16_t)
Returns
(int16_t) - FIR filter output
Remarks
Filter coefs may start at random or zero value, but convergence is dependent on the amount of update required.
Example
#define lmsTAPS 8
int16_t lmsOut;
int lmsTaps = lmsTAPS;
int16_t lmsCoefs[lmsTAPS]={0x5000, 0x4000,0x3000, 0x2000,0x1000, 0x0000,0xF000, 0xE000};
int16_t lmsDelay[lmsTAPS]={0};
int16_t *ptrLMSError;
int16_t lmsError = 0x0200;
int16_t inVal=0;
int16_t refVal = 0x0CCC; // some target value = 0.1
int16_t lmsAdapt = 0x3000;
ptrLMSError = &lmsError;
for (i=0;i<200;i++)
{
// get some input value here //
if (i < 100)
{
inVal = 0x4233;
}
else
{
inVal = 0xCF10;
}
lmsOut = DSP_FilterLMS16(inVal, refVal, lmsCoefs, lmsDelay,
ptrLMSError, lmsTaps, lmsAdapt);
}
5.4.1.5.3 Matrix Math Functions
5.4.1.5.3.1 DSP_MatrixAdd32 Function
C
void DSP_MatrixAdd32(
matrix32 * resMat,
matrix32 * srcMat1,
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matrix32 * srcMat2
);
Description
Function DSP_MatrixAdd32:
void DSP_MatrixAdd32(matrix32 *resMat, matrix32 *srcMat1, matrix32 *srcMat2);
Vector summation of two matrices, where both have 32-bit integer elements. The resulting output will saturate if element addition
exceeds MAX32 or MIN32.
Preconditions
Both matrices must be equivalent in rows and columns. Both Matrices must be set into structure (ROWS, COLUMNS,
vector_pointer).
Parameters
Parameters Description
resMat pointer to new sum Matrix C (*int32_t)
srcMat1 pointer to the Matrix A structure (*int32_t)
srcMat2 pointer to the Matrix B structure (*int32_t)
Returns
None.
Remarks
Execution Time (cycles): 225 cycles + 23 / matrix_element. The function will saturate the output value if it exceeds maximum
limits per element.
Example
#define ROW 2
#define COL 2
matrix32 *resMat, *srcMat1, *srcMat2;
int32_t result[ROW*COL];
int32_t matA[ROW*COL] = {1,2,3,4};
int32_t matB[ROW*COL] = {2,4,6,8};
matrix32 mat, mat2, mat3;
resMat=&mat;
srcMat1=&mat2;
srcMat2=&mat3;
srcMat1->row=ROW;
srcMat1->col=COL;
srcMat1->pMatrix=matA;
srcMat2->col=COL;
srcMat2->row=ROW;
srcMat2->pMatrix=matB;
resMat->row=ROW;
resMat->col=COL;
resMat->pMatrix=result;
DSP_MatrixAdd32(resMat, srcMat1, srcMat2);
// result[i] = matA[i] + matB[i] = {3,6,9,0xA}
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5.4.1.5.3.2 DSP_MatrixEqual32 Function
C
void DSP_MatrixEqual32(
matrix32 * resMat,
matrix32 * srcMat
);
Description
Function DSP_MatrixEqual32:
void DSP_MatrixEqual32(matrix32 *resMat, matrix32 *srcMat);
Vector copy of all elements from one matrix to another. C is a duplicate of A.
Preconditions
None.
Parameters
Parameters Description
resMat pointer to completed new Matrix C (*int32_t)
srcMat pointer to the Matrix A structure (*int32_t)
Returns
None.
Remarks
Execution Time (cycles): 163 cycles + 12 / matrix_element.
Example
#define ROW 2
#define COL 2
matrix32 *resMat, *srcMat1, *srcMat2;
int32_t result[ROW*COL];
int32_t matA[ROW*COL] = {5,2,-3,8};
matrix32 mat, mat2;
resMat=&mat;
srcMat1=&mat2;
srcMat1->row=ROW;
srcMat1->col=COL;
srcMat1->pMatrix=matA;
resMat->row=ROW;
resMat->col=COL;
resMat->pMatrix=result;
DSP_MatrixEqual32(resMat, srcMat1, srcMat2);
// result[i] = matA[i] = {5, 2, -3, 8}
5.4.1.5.3.3 DSP_MatrixInit32 Function
C
void DSP_MatrixInit32(
int32_t * data_buffer,
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int N,
int32_t num
);
Description
Function DSP_MatrixInit32:
void DSP_MatrixInit32(int32_t *data_buffer, int N, int32_t num);
Copy the value num into the first N Matrix elements of data_buffer.
Preconditions
data_buffer must be predefined to be equal to or greater than N elements. N must be a factor of four, or it will truncate to the
nearest factor of four.
Parameters
Parameters Description
data_buffer pointer to the Matrix to be initialized (int32_t[M*N])
N number of elements to be initialized (int32_t)
num value to be initialized into the matrix (int32_t)
Returns
None.
Remarks
None.
Example
#define ROW 3
#define COL 3
int32_t numElements = 4; // multiple of 4
int valueElements = -1;
int32_t matA[ROW*COL] = {5,2,-3,8,4,2,-6,8,9};
DSP_MatrixInit32(matA, numElements, valueElements);
// matA[i] = {-1,-1,-1,-1,4,2,-6,8,9}
5.4.1.5.3.4 DSP_MatrixMul32 Function
C
void DSP_MatrixMul32(
matrix32 * resMat,
matrix32 * srcMat1,
matrix32 * srcMat2
);
Description
Function DSP_MatrixMul32:
void DSP_MatrixMul32(matrix32 *resMat, matrix32 *srcMat1, matrix32 *srcMat2);
Multiplication of two matrices, with inputs and outputs being in fractional Q31 numerical format. The output elements will saturate
if the dot product exceeds maximum or minimum fractional values.
Preconditions
Matrices must be aligned such that columns of A = rows of B. resMat must have the format of rows of A, columns of B. All
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Matrices must be set into structure (ROWS, COLUMNS, vector_pointer).
Parameters
Parameters Description
resMat pointer to different Matrix C structure (*int32_t)
srcMat1 pointer to the Matrix A structure (*int32_t)
srcMat2 pointer to the Matrix B structure (*int32_t)
Returns
None.
Remarks
Execution Time (cycles): 319 cycles + 38 / output matrix_element. The function will saturate the output value if it exceeds
maximum limits per element.
Example
#define ROW1 3
#define COL1 2
#define ROW2 2
#define COL2 2
matrix32 *resMat, *srcMat1, *srcMat2;
int32_t result[ROW1*COL2];
int32_t test_MatrixA[ROW1*COL1]=
{
0x40000000,0x20000000, // 0.5, 0.25
0xD999999A,0x4CCCCCCC, // -0.3, 0.6
0xC0000000,0x0CCCCCCD // -0.5 0.1
};
int32_t test_MatrixB[ROW2*COL2]=
{
0x40000000,0x20000000, // 0.5, 0.25
0x0CCCCCCD,0xCCCCCCCD // 0.1, -0.4
};
matrix32 mat, mat2, mat3;
resMat=&mat;
srcMat1=&mat2;
srcMat2=&mat3;
srcMat1->row=ROW1;
srcMat1->col=COL1;
srcMat1->pMatrix=test_MatrixA;
srcMat2->col=COL2;
srcMat2->row=ROW2;
srcMat2->pMatrix=test_MatrixB;
resMat->row=ROW1; // note resulting matrix MUST have ROW1 & COL2 format
resMat->col=COL2;
resMat->pMatrix=result;
DSP_MatrixMul32(resMat, srcMat1, srcMat2);
// result[] = matA[] x matB[] =
// { 0x23333333, 0x03333333 // 0.275, 0.025
// 0xF47AE147, 0xD7AE147B // -0.9, -0.315
// 0xE147AE14, 0xEAE147AE } // -0.24, -0.165
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5.4.1.5.3.5 DSP_MatrixScale32 Function
C
void DSP_MatrixScale32(
int32_t * data_buffer,
int N,
int32_t num
);
Description
Function DSP_MatrixScale32:
void DSP_MatrixScale32(int32_t *data_buffer, int N, int32_t num);
Multiply the first N elements of an input buffer by a fixed scalar num. The resulting value is stored back into the input buffer. N
number total samples of the input buffer are processed. All values are in Q31 fractional integer format. The result of calculations
is saturated to the MAX32 or MIN32 value if exceeded.
Preconditions
data_buffer must be predefined to be equal to or greater than N elements. N must be a factor of four, or will truncate to the
nearest factor of four.
Parameters
Parameters Description
data_buffer pointer to the Matrix to be initialized (int32_t[M*N])
N number of elements to be initialized (int)
num value to be initialized into the matrix (int32_t)
Returns
None.
Remarks
Execution time (cycles): 190 + 9 cycles / element, typical.
Example
int32_t numScale = 0x40000000; // 0.5
int valN = 12;
int32_t inputBufScale[12] = {0x40000000, 0x40000000, 0x20000000, 0x20000000,
0x19999999, 0xCCCCCCCD, 0xF3333333, 0x80000000,
0x7FFFFFFF, 0x00000000, 0x40000000, 0x70000000 };
// 0.5, 0.5, 0.25, 0.25, 0.25, 0.2, -0.4, -0.1, -1, 1, 0, 0.5, 0.875
DSP_MatrixScale32(inputBufScale,valN,numScale);
// inputBufScale[i] = {0x20000000, 0x20000000, 0x10000000, 0x10000000,
// 0x0CCCCCCC, 0xE6666666, 0xF9999999, 0xC0000000,
// 0x3FFFFFFF, 0x00000000, 0x20000000, 0x38000000}
// 0.25, 0.25, 0.125, 0.125, 0.1, -0.2, -0.05, -0.5, 0.5, 0, 0.25, 0.4375
5.4.1.5.3.6 DSP_MatrixSub32 Function
C
void DSP_MatrixSub32(
matrix32 * resMat,
matrix32 * srcMat1,
matrix32 * srcMat2
);
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Description
Function DSP_MatrixSub32:
void DSP_MatrixSub32(matrix32 *resMat, matrix32 *srcMat1, matrix32 *srcMat2);
Vector subtraction of two matrices, where both have 32-bit integer elements. The resulting output will saturate if element addition
exceeds MAX32 or MIN32.
Preconditions
Both matrices must be equivalent in rows and columns. All Matrices must be set into structure (ROWS, COLUMNS,
vector_pointer)
Parameters
Parameters Description
resMat pointer to different Matrix C structure (*int32_t)
srcMat1 pointer to the Matrix A structure (*int32_t)
srcMat2 pointer to the Matrix B structure (*int32_t)
Returns
None.
Remarks
Execution Time (cycles): 222 cycles + 21 / matrix_element. The function will saturate the output value if it exceeds maximum
limits per element.
Example
#define ROW 2
#define COL 2
matrix32 *resMat, *srcMat1, *srcMat2;
int32_t result[ROW*COL];
int32_t matA[ROW*COL] = {5,2,-3,8};
int32_t matB[ROW*COL] = {2,2,2,2};
matrix32 mat, mat2, mat3;
resMat=&mat;
srcMat1=&mat2;
srcMat2=&mat3;
srcMat1->row=ROW;
srcMat1->col=COL;
srcMat1->pMatrix=matA;
srcMat2->col=COL;
srcMat2->row=ROW;
srcMat2->pMatrix=matB;
resMat->row=ROW;
resMat->col=COL;
resMat->pMatrix=result;
DSP_MatrixSub32(resMat, srcMat1, srcMat2);
// result[i] = matA[i] - matB[i] = {3,0,-5,6}
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5.4.1.5.3.7 DSP_MatrixTranspose32 Function
C
void DSP_MatrixTranspose32(
matrix32 * desMat,
matrix32 * srcMat
);
Description
Function DSP_MatrixTranspose32:
void DSP_MatrixTranspose32(matrix32 *desMat, matrix32 *srcMat);
Transpose of rows and columns of a matrix.
Preconditions
Matrix definitions for ROWS and COLS must be transposed prior to the function call.
Parameters
Parameters Description
desMat pointer to transposed new Matrix C (*int32_t)
srcMat pointer to the Matrix A structure (*int32_t)
Returns
None.
Remarks
Execution Time (cycles): 210 cycles + 10 / matrix_element.
Example
#define ROW 3
#define COL 4
matrix32 *resMat, *srcMat1;
int32_t result[ROW*COL];
int32_t matA[ROW*COL] = { 1, 2, 3, 4,
5, 6, 7, 8,
-1, -3, -5, -7};
matrix32 mat, mat2;
resMat=&mat;
srcMat1=&mat2;
srcMat1->row=ROW;
srcMat1->col=COL;
srcMat1->pMatrix=matA;
resMat->row=COL; // note the shift in columns and rows
resMat->col=ROW;
resMat->pMatrix=result;
DSP_MatrixTranspose32(resMat, srcMat1);
// result[] = matA(T)[] = { 1, 5, -1,
// 2, 6, -3,
// 3, 7, -5,
// 4, 8, -7}
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5.4.1.5.4 Transform Functions
5.4.1.5.4.1 DSP_TransformFFT16 Function
C
void DSP_TransformFFT16(
int16c * dout,
int16c * din,
int16c * twiddles,
int16c * scratch,
int log2N
);
Description
Function DSP_TransformFFT16:
void DSP_TransformFFT16(int16c *dout, int16c *din, int16c *twiddles, int16c *scratch, int log2N);
Performs an complex FFT on the input, din, and stores the complex result in dout. Performs 2^log2N point calculation, and the
working buffer scratch as well as the input and output must be 2^log2N in length. Coefficient twiddle factors come from twiddles,
and may be loaded with the use of DSP_TransformFFT16_setup. All values are 16 bit (Q15) fractional.
Preconditions
din, dout, twiddles and scratch must have N elements N is calculated as 2^(log2N) log2N must be >= 3 FFT factors must be
calculated in advance, use DSP_TransformFFT16_setup
Parameters
Parameters Description
dout pointer to complex output array (int16c)
din pointer to complex input array (int16c)
twiddles pointer to an complex array of factors (int16c)
scratch pointer to a complex scratch pad buffer (int16c)
log2N binary exponent of number of samples (int)
Returns
None.
Remarks
Scratch must be declared but need not be initialized. Din may be aided with a window function prior to calling the FFT, but is not
required. Din is a complex number array, but may be loaded solely with real numbers if no phase information is available.
Example
int log2N = 8; // log2(256) = 8
int fftSamples = 256;
int16c *fftDin;
int16c fftDout[fftSamples];
int16c scratch[fftSamples];
int16c fftCoefs[fftSamples];
int16c *fftc;
fftc = &fftCoefs;
DSP_TransformFFT16_setup(fftc, log2N); // call setup function
while (1)
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{
fftDin = &fftin_8Khz_long_window16; // get 256 point complex data
DSP_TransformFFT16(fftDout, fftDin, fftc, scratch, log2N);
// do something with the output, fftDout
};
5.4.1.5.4.2 DSP_TransformFFT16_setup Function
C
void DSP_TransformFFT16_setup(
int16c * twiddles,
int log2N
);
Description
Function DSP_TransformFFT16_setup:
void DSP_TransformFFT16_setup(int16c *twiddles, int log2N);
Calculates the N twiddle factors required to operate the FFT16 function. These factors are done in serial fashion, and require
considerable processing power. Ideally this function would be run only once prior to an ongoing FFT, and the results held in a
buffer.
Preconditions
twiddles must be N in length N is calculated (2^log2N)
Parameters
Parameters Description
twiddles pointer to a complex array of factors (int16c)
log2N binary exponent of number of data points (int)
Returns
None.
Remarks
This function is of considerable length and executed in C. It is recommended it only be called once for any given FFT length in
time sensitive applications.
Example
see DSP_TransformFFT16 for example.
5.4.1.5.4.3 DSP_TransformFFT32 Function
C
void DSP_TransformFFT32(
int32c * dout,
int32c * din,
int32c * twiddles,
int32c * scratch,
int log2N
);
Description
Function DSP_TransformFFT32:
void DSP_TransformFFT32(int32c *dout, int32c *din, int32c *twiddles, int32c *scratch, int log2N);
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Performs an complex FFT on the input, din, and stores the complex result in dout. Performs 2^log2N point calculation, and the
working buffer scratch as well as the input and output must be 2^log2N in length. Coefficient twiddle factors come from twiddles,
and may be loaded with the use of DSP_TransformFFT16_setup. All values are 16 bit (Q31) fractional.
Preconditions
din, dout, twiddles and scratch must have N elements N is calculated as 2^(log2N) log2N must be >= 3 FFT factors must be
calculated in advance, use DSP_TransformFFT32_setup
Parameters
Parameters Description
dout pointer to complex output array (int32c)
din pointer to complex input array (int32c)
twiddles pointer to an complex array of FFT factors (int32c)
scratch pointer to a complex scratch pad buffer (int32c)
log2N binary exponent of number of samples (int)
Returns
None.
Remarks
Scratch must be declared but need not be initialized. Din may be aided with a window function prior to calling the FFT, but is not
required. Din is a complex number array, but may be loaded solely with real numbers if no phase information is available.
Example
int log2N = 8; // log2(256) = 8
int fftSamples = 256;
int32c *fftDin;
int32c fftDout[fftSamples];
int32c scratch[fftSamples];
int32c fftCoefs[fftSamples];
int32c *fftc;
fftc = &fftCoefs;
DSP_TransformFFT32_setup(fftc, log2N); // call setup function
while (1)
{
fftDin = &fftin_5Khz_long_window32; // get 256 point complex data
DSP_TransformFFT32(fftDout, fftDin, fftc, scratch, log2N);
// do something with the output, fftDout
};
5.4.1.5.4.4 DSP_TransformFFT32_setup Function
C
void DSP_TransformFFT32_setup(
int32c * twiddles,
int log2N
);
Description
Function DSP_TransformFFT32_setup:
void DSP_TransformFFT32_setup(int32c *twiddles, int log2N);
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Calculates the N FFT twiddle factors required to operate the FFT32 function. These factors are done in serial fashion, and
require considerable processing power. Ideally this function would be run only once prior to an ongoing FFT, and the results held
in a buffer.
Preconditions
twiddles must be N in length N is calculated (2^log2N)
Parameters
Parameters Description
twiddles pointer to a complex array of coefficients (int32c)
log2N binary exponent of number of data points (int)
Returns
None.
Remarks
This function is of considerable length and executed in C. It is recommended it only be called once for any given FFT length in
time sensitive applications.
Example
see DSP_TransformFFT32 for example.
5.4.1.5.4.5 DSP_TransformIFFT16 Function
C
void DSP_TransformIFFT16(
int16c * dout,
int16c * din,
int16c * twiddles,
int16c * scratch,
int log2N
);
Description
Function DSP_TransformIFFT16:
void DSP_TransformIFFT16(int16c *dout, int16c *din, int16c *twiddles, int16c *scratch, int log2N);
Performs an complex Inverse FFT on the input, din, and stores the complex result in dout. Performs 2^log2N point calculation,
and the working buffer scratch as well as the input and output must be 2^log2N in length. Coefficient twiddle factors come from
twiddles, and may be loaded with the use of DSP_TransformFFT16_setup. All values are 16 bit (Q15) fractional.
Preconditions
din, dout, twiddles and scratch must have N elements N is calculated as 2^(log2N) log2N must be >= 3 FFT factors must be
calculated in advance, use DSP_TransformFFT16_setup
Parameters
Parameters Description
dout pointer to complex output array (int16c)
din pointer to complex input array (int16c)
twiddles pointer to an complex array of factors (int16c)
scratch pointer to a complex scratch pad buffer (int16c)
log2N binary exponent of number of samples (int)
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Returns
None.
Remarks
Scratch must be declared but need not be initialized. Din may be aided with a window function prior to calling the FFT, but is not
required. A very similar function to the FFT is executed for the inverse FFT. This requires twiddle factors set in advance with the
same method as used in the FFT. Complex conjugate and scaling are handled within the algorithm. The output is scaled using
binary shifting based on log2N. Since the algorithm reduces the output by a scale factor of log2N, the resolution is reduced
proportionally to the number of data points.
Example
int ilog2N = 10; // log2(64) = 6; log2(256) = 8; log2(1024) = 10;
int ifftSamples = pow(2,ilog2N);
int16c *ifftDin;
int16c ifftDout[ifftSamples];
int16c iscratch[ifftSamples];
int16c ifftCoefs[ifftSamples];
int16c ifftTimeOut[ifftSamples];
// set up twiddle factors, these are used for both FFT and iFFT
int16c *ifftc;
ifftc = &ifftCoefs;
DSP_TransformFFT16_setup( ifftc, ilog2N); // call to coef setup
// in this example, we take an FFT of an original time domain (sine wave)
// the output of the FFT is used as the input of the iFFT for comparison
ifftDin = &fftin_800hz_verylong16;
DSP_TransformFFT16(ifftDout, ifftDin, ifftc, iscratch, ilog2N);
// ifftDout = frequency domain output, complex number array
DSP_TransformIFFT16(ifftTimeOut, ifftDout, ifftc, iscratch, ilog2N);
// do something with the output, fftTimeOut, time domain
5.4.1.5.4.6 DSP_TransformWindow_Bart16 Function
C
void DSP_TransformWindow_Bart16(
int16_t * OutVector,
int16_t * InVector,
int N
);
Description
Function DSP_TransformWindow_Bart16:
void DSP_TransformWindow_Bart16(int16_t *OutVector, int16_t *InVector, int N);
Compute a Bartlett (Triangle) Window on the first N samples of the input vector, InVector. The output is stored in OutVector.
Operations are performed at higher resolution and rounded for the most accuracy possible. Input and output values are in Q15
fractional format. The Bartlett Window follows the equation:
Window(n) = 1 - (abs(2*n - N)/N) where n is the window sample number N is the total number of samples The functional output
computes WinVector(n) = Window(n) * InVector(n)
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Preconditions
N must be a positive number. OutWindow must be declared with N elements or larger.
Parameters
Parameters Description
OutWindow pointer to output array of elements (int16_t)
N number of samples (int)
Returns
None.
Remarks
This function is performed in C. The function may be optimized for the library. It is dependent on the floating point math library.
Example
int16_t OutVector16[8]={0};
int WindowN = 8;
for (i=0;i 0x6488
And converting from the _Q7_8 format with the value 0x1D89 would be:
0x1D89 / 28
= 7561 / 256 => 29.5316, accurate to 0.00391
Functions in the library are prefixed with the type of the return value. For example, _LIBQ_Q16Sqrt returns a _Q16 value equal
to the square root of its argument. Argument types do not always match the return type. Refer to the function prototype for a
specification of its arguments.
In cases where the return value is not a fixed-point type, the argument type is appended to the function name. For example,
_LIBQ_ToFloatQ31 accepts a type _Q31 argument.
In some cases, both the return type and the argument type are specified within the function name. For example:
Function Name Return Type Argument Type
_LIBQ_Q15_sin_Q2_13 _Q15 _Q2_13
_LIBQ_Q31_sin_Q2_29 _Q31 _Q2_29
5.4.2.4.2 Table of Library Functions
Math
Function
Function Definition
Divide _Q16 _LIBQ_Q16Div (_Q16 dividend, _Q16 divisor);
Square
Root
_Q16 _LIBQ_Q16Sqrt (_Q16 x);
Exponential _Q16 _LIBQ_Q16Exp (_Q16 x);
Log _Q4_11 _LIBQ_Q4_11_ln_Q16 (_Q16 x);
_Q3_12 _LIBQ_Q3_12_log10_Q16 (_Q16 x);
_Q5_10 _LIBQ_Q5_10_log2_Q16 (_Q16 x);
Power _Q16 _LIBQ_Q16Power (_Q16 x, _Q16 y);
Sine _Q15 _LIBQ_Q15_sin_Q2_13 (_Q2_13 x);
_Q31 _LIBQ_Q31_sin_Q2_29 (_Q2_29 x);
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Cosine _Q15 _LIBQ_Q15_cos_Q2_13 (_Q2_13 x);
_Q31 _LIBQ_Q31_cos_Q2_29 (_Q2_29 x);
Tangent _Q7_8 _LIBQ_Q7_8_tan_Q2_13 (_Q2_13 x);
_Q16 _LIBQ_Q16_tan_Q2_29 (_Q2_29 x);
Arcsin _Q2_13 _LIBQ_Q2_13_asin_Q15 (_Q15 x);
_Q2_29 _LIBQ_Q2_29_asin_Q31 (_Q31 x);
_Q2_29 _LIBQ_Q2_29_asin_Q31_Fast (_Q31 x);
Arccos _Q2_13 _LIBQ_Q2_13_acos_Q15 (_Q15 x);
_Q2_29 _LIBQ_Q2_29_acos_Q31 (_Q31 x);
_Q2_29 _LIBQ_Q2_29_acos_Q31_Fast (_Q31 x);
Arctan _Q2_13 _LIBQ_Q2_13_atan_Q7_8 (_Q7_8 x);
_Q2_29 _LIBQ_Q2_29_atan_Q16 (_Q16 x);
Arctan2 _Q2_13 _LIBQ_Q2_13_atan2_Q7_8 (_Q7_8 y, _Q7_8 x);
_Q2_29 _LIBQ_Q2_29_atan2_Q16 (_Q16 y, _Q16 x);
Random
Number
_Q15 _LIBQ_Q15Rand (int64_t *pSeed);
_Q31 _LIBQ_Q31Rand (int64_t *pSeed);
Float float _LIBQ_ToFloatQ31 (_Q31 x);
float _LIBQ_ToFloatQ15 (_Q15 x);
_Q31 _LIBQ_Q31FromFloat (float x);
_Q15 _LIBQ_Q15FromFloat (float x);
String void _LIBQ_ToStringQ15 (_Q15 x, char *s);
_Q15 _LIBQ_Q15FromString (char *s);
5.4.2.5 Library Interface
Data Types and Constants
Name Description
_Q15_MAX Maximum value of _Q15 (~1.0)
_Q15_MIN Minimum value of _Q15 (-1.0)
_Q16_MAX Maximum value of _Q16 (~32768.0)
_Q16_MIN Minimum value of _Q16 (-32768.0)
_Q2_13_MAX Maximum value of _Q2_13 (~4.0)
_Q2_13_MIN Minimum value of _Q2_13 (-4.0)
_Q2_29_MAX Maximum value of _Q2_29 (~4.0)
_Q2_29_MIN Minimum value of _Q2_29 (-4.0)
_Q3_12_MAX Maximum value of _Q3_12 (~8.0)
_Q3_12_MIN Minimum value of _Q3_12 (-8.0)
_Q31_MAX Maximum value of _Q31 (~1.0)
_Q31_MIN Minimum value of _Q31 (-1.0)
_Q4_11_MAX Maximum value of _Q4_11 (~16.0)
_Q4_11_MIN Minimum value of _Q4_11 (-16.0)
_Q5_10_MAX Maximum value of _Q5_10 (~32.0)
_Q5_10_MIN Minimum value of _Q5_10 (-32.0)
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_Q7_8_MAX Maximum value of _Q7_8 (~128.0)
_Q7_8_MIN Minimum value of _Q7_8 (-128.0)
_Q0_15 1 sign bit, 15 bits right of radix
_Q0_31 1 sign bit, 31 bits right of radix
_Q15 Short name for _Q0_15
_Q15_16 1 sign bit, 15 bits left of radix, 16 bits right of radix
_Q16 Short name for _Q15_16
_Q2_13 1 sign bit, 2 bits left of radix, 13 bits right of radix
_Q2_29 1 sign bit, 2 bits left of radix, 29 bits right of radix
_Q3_12 1 sign bit, 3 bits left of radix, 12 bits right of radix
_Q31 Short name for _Q_0_31
_Q4_11 1 sign bit, 4 bits left of radix, 11 bits right of radix
_Q5_10 1 sign bit, 5 bits left of radix, 10 bits right of radix
_Q7_8 1 sign bit, 7 bits left of radix, 8 bits right of radix
Arccos Functions
Name Description
_LIBQ_Q2_13_acos_Q15 Calculates the value of acos(x).
_LIBQ_Q2_29_acos_Q31 Calculates the value of acos(x).
_LIBQ_Q2_29_acos_Q31_Fast Calculates the value of acos(x). This function executes faster than
_LIBQ_Q2_29_acos_Q31 but is less precise.
Arcsin Functions
Name Description
_LIBQ_Q2_13_asin_Q15 Calculates the asin value of asin(x).
_LIBQ_Q2_29_asin_Q31 Calculates the value of asin(x).
_LIBQ_Q2_29_asin_Q31_Fast Calculates the value of asin(x). This function executes faster than the
_LIBQ_Q2_29_asin_Q31 function, but is less precise.
Arctan Functions
Name Description
_LIBQ_Q2_13_atan_Q7_8 Calculates the value of atan(x).
_LIBQ_Q2_29_atan_Q16 Calculates the value of atan(x).
Arctan2 Functions
Name Description
_LIBQ_Q2_13_atan2_Q7_8 Calculates the value of atan2(y, x).
_LIBQ_Q2_29_atan2_Q16 Calculates the value of atan2(y, x).
Cosine Functions
Name Description
_LIBQ_Q15_cos_Q2_13 Calculates the value of cosine(x).
_LIBQ_Q31_cos_Q2_29 Calculates the value of cosine(x).
Divide Functions
Name Description
_LIBQ_Q16Div _Q16 fixed point divide.
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Exponential Functions
Name Description
_LIBQ_Q16Exp Calculates the exponential function e^x.
Float Functions
Name Description
_LIBQ_Q15FromFloat Converts a float to a _Q15 value.
_LIBQ_Q31FromFloat Converts a float to a _Q31 value.
_LIBQ_ToFloatQ15 Converts a _Q15 value to a float.
_LIBQ_ToFloatQ31 Converts a _Q31 value to a float.
Log Functions
Name Description
_LIBQ_Q3_12_log10_Q16 Calculates the value of Log10(x).
_LIBQ_Q4_11_ln_Q16 Calculates the natural logarithm ln(x).
_LIBQ_Q5_10_log2_Q16 Calculates the value of log2(x).
Power Functions
Name Description
_LIBQ_Q16Power Calculates the value of x raised to the y power (x^y).
Random Number Functions
Name Description
_LIBQ_Q15Rand Generate a _Q15 random number.
_LIBQ_Q31Rand Generate a _Q31 random number.
Sine Functions
Name Description
_LIBQ_Q15_sin_Q2_13 Calculates the value of sine(x).
_LIBQ_Q31_sin_Q2_29 Calculates the value of sine(x).
Square Root Functions
Name Description
_LIBQ_Q16Sqrt Square root of a positive _Q16 fixed point value.
String Functions
Name Description
_LIBQ_Q15FromString Ascii to _Q15 conversion.
_LIBQ_ToStringQ15 _Q15 to ascii conversion.
Target Functions
Name Description
_LIBQ_Q16_tan_Q2_29 Calculates the value of tan(x).
_LIBQ_Q7_8_tan_Q2_13 Calculates the value of tan(x).
Description
This section describes the Application Programming Interface (API) functions, macros, and types of the LibQ Fixed Point Math
Library.
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Refer to each section for a detailed description.
5.4.2.5.1 Divide Functions
5.4.2.5.1.1 _LIBQ_Q16Div Function
C
_Q16 _LIBQ_Q16Div(
_Q16 dividend,
_Q16 divisor
);
Description
Function _LIBQ_Q16Div:
_Q16 _LIBQ_Q16Div (_Q16 dividend, _Q16 divisor);
Quotient (_Q16) = Dividend (_Q16) / Divisor (_Q16).
Preconditions
Divisor must not equal 0.
Parameters
Parameters Description
dividend The divide operation dividend (_Q16)
divisor The divide operation divisor (_Q16)
Returns
_Q16 quotient of the divide operation
Remarks
The _LIBQ_Q16Div operation saturates its result.
Execution Time (cycles): 143 typical (80 to 244) Program Memory 204 bytes
Error <= 0.000015258789 (accurate to least significant _Q16 bit within the non-saturated range)
Example
_Q16 quotient, dividend, divisor;
dividend = (_Q16)0x00010000; // 1
divisor = (_Q16)0x00008000; // 0.5
quotient = _LIBQ_Q16Div (dividend, divisor);
// quotient now equals 2; ie. (_Q16)0x00020000;
5.4.2.5.2 Square Root Functions
5.4.2.5.2.1 _LIBQ_Q16Sqrt Function
C
_Q16 _LIBQ_Q16Sqrt(
_Q16 x
);
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Description
Function _LIBQ_Q16Sqrt:
_Q16 _LIBQ_Q16Sqrt(_Q16 x);
Calculate the square root of a positive _Q16 fixed point value, and return the _Q16 result.
Preconditions
The input value must be positive.
Parameters
Parameters Description
x The _Q16 fixed point value input from which to find the square root.
Returns
_LIBQ_Q16Sqrt returns the _Q16 fixed point value which is the square root of the input parameter.
Remarks
Execution Time (cycles): 240 typical (104 to 258) Program Memory 152 bytes
Error <= 0.000015258789 (accurate to least significant _Q16 bit)
Example
_Q16 squareRoot;
squareRoot = _LIBQ_Q16Sqrt((_Q16)0x01000000); // The square root of 256.0 is 16.0 (0x00100000)
squareRoot = _LIBQ_Q16Sqrt((_Q16)0x00004000); // The square root of 0.25 is 0.5 (0x00008000)
squareRoot = _LIBQ_Q16Sqrt((_Q16)0x5851f42d); // The square root of 22609.953125 is
150.366074 (0x00965db7)
5.4.2.5.3 Log Functions
5.4.2.5.3.1 _LIBQ_Q3_12_log10_Q16 Function
C
_Q3_12 _LIBQ_Q3_12_log10_Q16(
_Q16 x
);
Description
Function _LIBQ_Q3_12_log10_Q16:
_Q3_12 _LIBQ_Q3_12_log10_Q16 (_Q16 x);
Calculates the log10(x), where log10(x) = ln(x) * log10(e). x is of type _Q16 and must be positive. The resulting value is of type
_Q3_12.
Preconditions
The input x must be positive.
Parameters
Parameters Description
x The input value from which to calculate log10(x).
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Returns
_LIBQ_Q3_12_log10_Q16 returns the _Q3_12 fixed point result from the calculation log10(x).
Remarks
Execution Time (cycles): 301 typical (14 to 346) Program Memory 176 bytes
Error <= 0.000244140625 (accurate to least significant _Q3_12 bit)
Example
_Q3_12 resultLog10;
resultLog10 = _LIBQ_Q3_12_log10_Q16 ((_Q16)0x12ed7d91); // _LIBQ_Q3_12_log10_Q16(4845.490494)
= 3.685303 (0x3af7)
5.4.2.5.3.2 _LIBQ_Q4_11_ln_Q16 Function
C
_Q4_11 _LIBQ_Q4_11_ln_Q16(
_Q16 x
);
Description
Function _LIBQ_Q4_11_ln_Q16:
_Q4_11 _LIBQ_Q4_11_ln_Q16 (_Q16 x);
Calculates the natural logarithm ln(x). x is of type _Q16 and must be positive. The resulting value is of type _Q4_11.
Preconditions
The input x must be positive.
Parameters
Parameters Description
x The input value from which to calculate ln(x).
Returns
_LIBQ_Q4_11_ln_Q16 returns the _Q4_11 fixed point result from the calculation ln(x).
Remarks
Execution Time (cycles): 301 typical (14 to 346) Program Memory 176 bytes
Error <= 0.00048828 (accurate to least significant _Q4_11 bit)
Example
_Q4_11 resultLN;
resultLN = _LIBQ_Q4_11_ln_Q16 ((_Q16)0x00004000); // _LIBQ_Q4_11_LN_Q16(0.250000) = -1.386230
(0xf4e9)
5.4.2.5.3.3 _LIBQ_Q5_10_log2_Q16 Function
C
_Q5_10 _LIBQ_Q5_10_log2_Q16(
_Q16 x
);
Description
Function _LIBQ_Q5_10_log2_Q16:
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_Q5_10 _LIBQ_Q5_10_log2_Q16 (_Q16 x);
Calculates the log2(x), where log2(x) = ln(x) * log2(e). x is of type _Q16 and must be positive. The resulting value is of type
_Q5_10.
Preconditions
The input x must be positive.
Parameters
Parameters Description
x The input value from which to calculate log2(x).
Returns
_LIBQ_Q5_10_log2_Q16 returns the _Q5_10 fixed point result from the calculation log2(x).
Remarks
Execution Time (cycles): 227 typical (14 to 268) Program Memory 164 bytes
Error <= 0.0009765625 (accurate to least significant _Q5_10 bit)
Example
_Q5_10 resultLog2;
resultLog2 = _LIBQ_Q5_10_log2_Q16 ((_Q16)0x40000000); // _LIBQ_Q5_10_log2_Q16(16384.000000) =
14.000000 (0x3800)
5.4.2.5.4 Power Functions
5.4.2.5.4.1 _LIBQ_Q16Power Function
C
_Q16 _LIBQ_Q16Power(
_Q16 x,
_Q16 y
);
Description
Function _LIBQ_Q16Power:
_Q16 _LIBQ_Q16Power (_Q16 x, _Q16 y);
Calculates the x raised to the y power. Both x and y are of type _Q16. x must be positive. The calculation will saturate if the
resulting value is outside the range of the _Q16 representation.
Preconditions
x must be positive.
Parameters
Parameters Description
x The _Q16 input value x from which to calculate x raised to the y.
y The _Q16 input value y from which to calculate x raised to the y.
Returns
_LIBQ_Q16Power returns the _Q16 fixed point result from the calculation x raised to the y.
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Remarks
Execution Time (cycles): 882 typical (586 to 1042) Program Memory 1038 bytes
Error <= 0.000015258789 (accurate to least significant _Q16 bit within the non-saturated range)
Example
_Q16 resultPower;
resultPower = _LIBQ_Q16Power ((_Q16)0x00020000, (_Q16)0xffff0000); //
_LIBQ_Q16Power(2.000000, -1.000000) = 0.500000 (0x00008000)
5.4.2.5.5 Exponential Functions
5.4.2.5.5.1 _LIBQ_Q16Exp Function
C
_Q16 _LIBQ_Q16Exp(
_Q16 x
);
Description
Function _LIBQ_Q16Exp:
_Q16 _LIBQ_Q16Exp(_Q16 x);
Calculates the exponential function e^x. The calculation will saturate if the resulting value is outside the range of the _Q16
representation. For x > 10.3972015380859375, the resulting value will be saturated to 0x7fffffff. For x < -10.3972015380859375
the resulting value will be saturated to 0.
Preconditions
None.
Parameters
Parameters Description
x The exponent value
Returns
_LIBQ_Q16Exp returns the _Q16 fixed point result from the calculation e^x.
Remarks
The function _LIBQ_Q16Div is called by this routine and thus must be linked into the executable image.
Execution Time (cycles): 170 typical (18 to 292) Program Memory 446 bytes
Error <= 0.000015258789 (accurate to least significant _Q16 bit within the non-saturated range)
Example
_Q16 expResult;
expResult = _LIBQ_Q16Exp((_Q16)0x00010000); // _LIBQ_Q16Exp(1.000000) = 2.718277 (0x0002b7e1)
5.4.2.5.6 Sine Functions
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5.4.2.5.6.1 _LIBQ_Q15_sin_Q2_13 Function
C
_Q15 _LIBQ_Q15_sin_Q2_13(
_Q2_13 x
);
Description
Function _LIBQ_Q15_sin_Q2_13:
_Q15 _LIBQ_Q15_sin_Q2_13 (_Q2_13 x);
Calculates the sine(x), where x is of type _Q2_13 radians and the resulting value is of type _Q15.
Preconditions
None.
Parameters
Parameters Description
x The _Q2_13 input value from which to calculate sine(x).
Returns
_LIBQ_Q15_sin_Q2_13 returns the _Q15 fixed point result from the calculation sine(x).
Remarks
Execution Time (cycles): 100 typical (100 to 102) Program Memory 220 bytes
Error <= 0.00003052 (accurate to least significant _Q15 bit)
Example
_Q15 resultSin;
resultSin = _LIBQ_Q15_sin_Q2_13 ((_Q2_13)0x4093); // _LIBQ_Q15_sin_Q2_13(2.017944) = 0.901672
(0x736a)
5.4.2.5.6.2 _LIBQ_Q31_sin_Q2_29 Function
C
_Q31 _LIBQ_Q31_sin_Q2_29(
_Q2_29 x
);
Description
Function _LIBQ_Q31_sin_Q2_29:
_Q31 _LIBQ_Q31_sin_Q2_29 (_Q2_29 x);
Calculates the sine(x), where x is of type _Q2_29 radians and the resulting value is of type _Q31.
Preconditions
None.
Parameters
Parameters Description
x The _Q2_29 input value from which to calculate sine(x).
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Returns
_LIBQ_Q31_sin_Q2_29 returns the _Q31 fixed point result from the calculation sine(x).
Remarks
Execution Time (cycles): 246 typical (244 to 266) Program Memory 598 bytes
Error <= 0.00000000047 (accurate to least significant _Q31 bit)
Example
_Q31 resultSin;
resultSin = _LIBQ_Q31_sin_Q2_29 ((_Q2_29)0x5a637cfe); // _LIBQ_Q31_sin_Q2_29( 2.824644562) =
0.311668121 (0x27e4bdb1)
5.4.2.5.7 Cosine Functions
5.4.2.5.7.1 _LIBQ_Q15_cos_Q2_13 Function
C
_Q15 _LIBQ_Q15_cos_Q2_13(
_Q2_13 x
);
Description
Function _LIBQ_Q15_cos_Q2_13:
_Q15 _LIBQ_Q15_cos_Q2_13 (_Q2_13 x);
Calculates the cosine(x), where x is of type _Q2_13 radians and the resulting value is of type _Q15.
Preconditions
None
Parameters
Parameters Description
x The _Q2_13 input value from which to calculate cosine(x).
Returns
_LIBQ_Q15_cos_Q2_13 returns the _Q15 fixed point result from the calculation cosine(x).
Remarks
Execution Time (cycles): 102 cycles Program Memory 224 bytes
Error <= 0.00003052 (accurate to least significant _Q15 bit)
Example
_Q15 resultCos;
resultCos = _LIBQ_Q15_cos_Q2_13 ((_Q2_13)0x2171); // _LIBQ_Q15_cos_Q2_13(1.045044) = 0.501862
(0x403d)
5.4.2.5.7.2 _LIBQ_Q31_cos_Q2_29 Function
C
_Q31 _LIBQ_Q31_cos_Q2_29(
_Q2_29 x
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);
Description
Function _LIBQ_Q31_cos_Q2_29:
_Q31 _LIBQ_Q31_cos_Q2_29 (_Q2_29 x);
Calculates the cosine(x), where x is of type _Q2_29 radians and the resulting value is of type _Q31.
Preconditions
None.
Parameters
Parameters Description
x The _Q2_29 input value from which to calculate cosine(x).
Returns
_LIBQ_Q31_cos_Q2_29 returns the _Q31 fixed point result from the calculation sine(x).
Remarks
Execution Time (cycles): 265 typical (22 to 288) Program Memory 746 bytes
Error <= 0.00000000047 (accurate to least significant _Q31 bit)
Example
_Q31 resultCos;
resultCos = _LIBQ_Q31_cos_Q2_29 ((_Q2_29)0x07e2e1c2); // _LIBQ_Q31_cos_Q2_29( 0.246445540) =
0.969785686 (0x7c21eff7)
5.4.2.5.8 Target Functions
5.4.2.5.8.1 _LIBQ_Q16_tan_Q2_29 Function
C
_Q16 _LIBQ_Q16_tan_Q2_29(
_Q2_29 x
);
Description
Function _LIBQ_Q16_tan_Q2_29:
_Q16 _LIBQ_Q16_tan_Q2_29 (_Q2_29 x);
Calculates the tan(x), where x is of type _Q2_29 radians and the resulting value is of type _Q16.
Preconditions
None
Parameters
Parameters Description
x The _Q2_29 input value from which to calculate tan(x).
Returns
_LIBQ_Q16_tan_Q2_29 returns the _Q16 fixed point result from the calculation tan(x). The resulting value is saturated.
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Remarks
The functions _LIBQ_Q31_sin_Q2_29, _LIBQ_Q31_cos_Q2_29, and _LIBQ_Q16Div are called by this routine and thus must be
linked into the executable image.
Execution Time (cycles): 703 typical (22 to 796) Program Memory 88 bytes
Error <= 0.000015259 (accurate to least significant _Q16 bit for the input range -1.568 .. 1.568) Error rises from 0.0 to 0.065 for
the input range -1.568 .. -1.570765808 and 1.568 .. 1.570765808)
Example
_Q16 resultTan;
resultTan = _LIBQ_Q16_tan_Q2_29 ((_Q2_29)0x16720c36); // _LIBQ_Q16_tan_Q2_29( 0.701421838) =
0.844726562 (0x0000d840)
5.4.2.5.8.2 _LIBQ_Q7_8_tan_Q2_13 Function
C
_Q7_8 _LIBQ_Q7_8_tan_Q2_13(
_Q2_13 x
);
Description
Function _LIBQ_Q7_8_tan_Q2_13:
_Q7_8 _LIBQ_Q7_8_tan_Q2_13 (_Q2_13 x);
Calculates the tan(x), where x is of type _Q2_13 radians and the resulting value is of type _Q7_8.
Preconditions
None
Parameters
Parameters Description
x The _Q2_13 input value from which to calculate tan(x).
Returns
_LIBQ_Q7_8_tan_Q2_13 returns the _Q7_8 fixed point result from the calculation tan(x).
Remarks
Execution Time (cycles): 288 typical (18 to 346) Program Memory 980 bytes
Error <= 0.00390625 (accurate to least significant _Q7_8 bit)
Example
_Q7_8 resultTan;
resultTan = _LIBQ_Q7_8_tan_Q2_13 ((_Q2_13)0x2e20); // _LIBQ_Q7_8_tan_Q2_13(1.441406) =
7.683594 (0x07af)
5.4.2.5.9 Arcsin Functions
5.4.2.5.9.1 _LIBQ_Q2_13_asin_Q15 Function
C
_Q2_13 _LIBQ_Q2_13_asin_Q15(
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_Q15 x
);
Description
Function _LIBQ_Q2_13_asin_Q15:
_Q2_13 _LIBQ_Q2_13_asin_Q15 (_Q15 x);
Calculates asin(x), where x is of type _Q15 and the resulting value is of type _Q2_13. The output value will be radians in the
range pi >= result >= -pi.
Preconditions
None.
Parameters
Parameters Description
x The _Q15 input value from which to calculate asin(x).
Returns
_LIBQ_Q2_13_asin_Q15 returns the _Q2_13 fixed point result from the calculation asin(x).
Remarks
The functions _LIBQ_Q16Sqrt and _LIBQ_Q16Div are called by this routine and thus must be linked into the executable image.
Execution Time (cycles): 578 typical (22 to 656) Program Memory 336 bytes
Error <= 0.00012207 (accurate to least significant _Q2_13 bit)
A higher resolution version of this function exists with equivalent performance, see _LIBQ_Q2_29_asin_Q31_Fast
Example
_Q2_13 resultAsin;
resultAsin = _LIBQ_Q2_13_asin_Q15 ((_Q15)0x3231); // _LIBQ_Q2_13_asin_Q15(0.392120) =
0.402954 (0x0ce5)
5.4.2.5.9.2 _LIBQ_Q2_29_asin_Q31 Function
C
_Q2_29 _LIBQ_Q2_29_asin_Q31(
_Q31 x
);
Description
Function _LIBQ_Q2_29_asin_Q31:
_Q2_29 _LIBQ_Q2_29_asin_Q31 (_Q31 x);
Calculates the asin(x), where x is of type _Q31 and the resulting value is of type _Q2_29. The output value will be in radians the
range pi >= result >= -pi.
Preconditions
None.
Parameters
Parameters Description
x The _Q31 input value from which to calculate asin(x).
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Returns
_LIBQ_Q2_29_asin_Q31 returns the _Q2_29 fixed point result from the calculation asin(x).
Remarks
The functions _LIBQ_Q2_29_asin_Q31_Fast and_LIBQ_Q31_sin_Q2_29 are called by this routine and thus must be linked into
the executable image.
Execution Time (cycles): 2525 typical (286 to 4330) Program Memory 138 bytes
Error <= 0.0000000019 (accurate to least significant _Q2_29 bit for the range -0.9993..0.9993) Error <= 0.0000000346 (accurate
to 5th least significant _Q2_29 bit for the range -1.0 .. -0.9993 and 0.9993 .. 1.0)
A faster version of this function exists with modestly reduced accuracy, see _LIBQ_Q2_29_asin_Q31_Fast
Example
_Q2_29 resultAsin;
resultAsin = _LIBQ_Q2_29_asin_Q31 ((_Q31)0x7fe50658); // _LIBQ_Q2_29_asin_Q31( 0.9991767816)
= 1.5302172359 (0x30f78a23)
5.4.2.5.9.3 _LIBQ_Q2_29_asin_Q31_Fast Function
C
_Q2_29 _LIBQ_Q2_29_asin_Q31_Fast(
_Q31 x
);
Description
Function _LIBQ_Q2_29_asin_Q31_Fast:
_Q2_29 _LIBQ_Q2_29_asin_Q31_Fast (_Q31 x);
Calculates the asin(x), where x is of type _Q31 and the resulting value is of type _Q2_29. The output value will be in radians the
range pi >= result >= -pi.
Preconditions
None.
Parameters
Parameters Description
x The _Q31 input value from which to calculate asin(x).
Returns
_LIBQ_Q2_29_asin_Q31_Fast returns the _Q2_29 fixed point result from the calculation asin(x).
Remarks
Execution Time (cycles): 507 typical (22 to 1300) Program Memory 638 bytes
Error <= 0.000000911 (accurate to 9 least significant _Q2_29 bits)
A higher resolution version of this function exists with reduced performance, see _LIBQ_Q2_29_asin_Q31
Example
_Q2_29 resultAsin;
resultAsin = _LIBQ_Q2_29_asin_Q31_Fast ((_Q31)0x7fe50658); // _LIBQ_Q2_29_asin_Q31_Fast(
0.9991767816) = 1.5302172359 (0x30f78a23)
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5.4.2.5.10 Arccos Functions
5.4.2.5.10.1 _LIBQ_Q2_13_acos_Q15 Function
C
_Q2_13 _LIBQ_Q2_13_acos_Q15(
_Q15 x
);
Description
Function _LIBQ_Q2_13_acos_Q15:
_Q2_13 _LIBQ_Q2_13_acos_Q15 (_Q15 x);
Calculates the acos(x), where x is of type _Q15 and the resulting value is of type _Q2_13. The output value will be radians in the
range pi >= result >= -pi.
Preconditions
None.
Parameters
Parameters Description
x The _Q15 input value from which to calculate acos(x).
Returns
_LIBQ_Q2_13_acos_Q15 returns the _Q2_13 fixed point result from the calculation acos(x).
Remarks
The function _LIBQ_Q2_13_asin_Q15 is called by this routine and thus must be linked into the executable image.
Execution Time (cycles): 588 typical (32 to 666) Program Memory 24 bytes
Error <= 0.00012207 (accurate to least significant _Q2_13 bit)
A higher precision function with equivalent performance exists, see _LIBQ_Q2_29_acos_Q31_Fast
Example
_Q2_13 resultAcos;
resultAcos = _LIBQ_Q2_13_acos_Q15((_Q15)0x2993); // _LIBQ_Q2_13_acos_Q15(0.324799) = 1.239990
(0x27ae)
5.4.2.5.10.2 _LIBQ_Q2_29_acos_Q31 Function
C
_Q2_29 _LIBQ_Q2_29_acos_Q31(
_Q31 x
);
Description
Function _LIBQ_Q2_29_acos_Q31:
_Q2_29 _LIBQ_Q2_29_acos_Q31 (_Q31 x);
Calculates the acos(x), where x is of type _Q31 and the resulting value is of type _Q2_29. The output value will be radians in the
range pi >= result >= -pi.
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Preconditions
None.
Parameters
Parameters Description
x The _Q31 input value from which to calculate acos(x).
Returns
_LIBQ_Q2_29_acos_Q31 returns the _Q2_29 fixed point result from the calculation acos(x).
Remarks
The functions _LIBQ_Q2_29_asin_Q31_Fast and _LIBQ_Q31_cos_Q2_29 are called by this routine and thus must be linked
into the executable image.
Execution Time (cycles): 3370 typical (70 to 4824) Program Memory 142 bytes
Error <= 0.0000000019 (accurate to least significant _Q2_29 bit for the range -0.9993..0.9993) Error <= 0.0000000355 (accurate
to 5th least significant _Q2_29 bit for the range -1.0 .. -0.9993 and 0.9993 .. 1.0)
A similar function with higher performance and reduced precision exists, see _LIBQ_Q2_29_acos_Q31_Fast
Example
_Q2_29 resultAcos;
resultAcos = _LIBQ_Q2_29_acos_Q31 ((_Q31)0xee63708c); // _LIBQ_Q2_29_acos_Q31(-0.1375903431)
= 1.7088244837 (0x36aeb0af)
5.4.2.5.10.3 _LIBQ_Q2_29_acos_Q31_Fast Function
C
_Q2_29 _LIBQ_Q2_29_acos_Q31_Fast(
_Q31 x
);
Description
Function _LIBQ_Q2_29_acos_Q31_Fast:
_Q2_29 _LIBQ_Q2_29_acos_Q31_Fast (_Q31 x);
Calculates the acos(x), where x is of type _Q31 and the resulting value is of type _Q2_29. The output value will be radians in the
range pi >= result >= -pi.
Preconditions
None.
Parameters
Parameters Description
x The _Q31 input value from which to calculate acos(x).
Returns
_LIBQ_Q2_29_acos_Q31_Fast returns the _Q2_29 fixed point result from the calculation acos(x).
Remarks
The function _LIBQ_Q2_29_asin_Q31_Fast is called by this routine and thus must be linked into the executable image.
Execution Time (cycles): 517 typical (32 to 1310) Program Memory 28 bytes
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Error <= 0.000000911 (accurate to 9 least significant _Q2_29 bits)
A higher precision function with reduced performance exists, see _LIBQ_Q2_29_acos_Q31
Example
_Q2_29 resultAcos;
resultAcos = _LIBQ_Q2_29_acos_Q31_Fast ((_Q31)0xee63708c); //
_LIBQ_Q2_29_acos_Q31_Fast(-0.1375903431) = 1.7088244837 (0x36aeb0af)
5.4.2.5.11 Arctan Functions
5.4.2.5.11.1 _LIBQ_Q2_13_atan_Q7_8 Function
C
_Q2_13 _LIBQ_Q2_13_atan_Q7_8(
_Q7_8 x
);
Description
Function _LIBQ_Q2_13_atan_Q7_8:
_Q2_13 _LIBQ_Q2_13_atan_Q7_8 (_Q7_8 x);
Calculates the atan(x), where x is of type _Q7_8 and the resulting value is of type _Q2_13. The output value will be radians in
the range pi >= result >= -pi.
Preconditions
None.
Parameters
Parameters Description
x The _Q7_8 input value from which to calculate atan(x).
Returns
_LIBQ_Q2_13_atan_Q7_8 returns the _Q2_13 fixed point result from the calculation atan(x).
Remarks
The function _LIBQ_Q2_13_atan2_Q7_8 is called by this routine and thus must be linked into the executable image.
Execution Time (cycles): 240 typical (202 to 256) Program Memory 16 bytes
Error <= 0.00012207 (accurate to least significant _Q2_13 bit)
Example
_Q2_13 resultAtan;
resultAtan = _LIBQ_Q2_13_atan_Q7_8 ((_Q7_8)0x0097); // _LIBQ_Q2_13_atan_Q7_8(0.589844) =
0.532959 (0x110e)
5.4.2.5.11.2 _LIBQ_Q2_29_atan_Q16 Function
C
_Q2_29 _LIBQ_Q2_29_atan_Q16(
_Q16 x
);
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Description
Function _LIBQ_Q2_29_atan_Q16:
_Q2_29 _LIBQ_Q2_29_atan_Q16 (_Q16 x);
Calculates the atan(x), where x is of type _Q16 and the resulting value is of type _Q2_29. The output value will be radians in the
range pi >= result >= -pi.
Preconditions
None.
Parameters
Parameters Description
x The _Q16 input value from which to calculate atan(x).
Returns
_LIBQ_Q2_29_atan_Q16 returns the _Q2_29 fixed point result from the calculation atan(x).
Remarks
The function _LIBQ_Q2_29_atan2_Q16 is called by this routine and thus must be linked into the executable image.
Execution Time (cycles): 354 typical (178 to 360) Program Memory 16 bytes
Error <= 0.000000003 (accurate within one least significant _Q2_29 bit)
Example
_Q2_29 resultAtan;
resultAtan = _LIBQ_Q2_29_atan_Q16 ((_Q16)0x00098b31); // _LIBQ_Q2_29_atan_Q16(9.543716) =
1.466396 (0x2eecb7ee)
5.4.2.5.12 Arctan2 Functions
5.4.2.5.12.1 _LIBQ_Q2_13_atan2_Q7_8 Function
C
_Q2_13 _LIBQ_Q2_13_atan2_Q7_8(
_Q7_8 y,
_Q7_8 x
);
Description
Function _LIBQ_Q2_13_atan2_Q7_8:
_Q2_13 _LIBQ_Q2_13_atan2_Q7_8 (_Q7_8 y, _Q7_8 x);
Calculates the atan2(y, x), where y and x are of type _Q7_8 and the resulting value is of type _Q2_13. The output value will be
radians in the range pi >= result >= -pi.
Preconditions
None.
Parameters
Parameters Description
y The _Q7_8 input value from which to calculate atan2(y, x).
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x The _Q7_8 input value from which to calculate atan2(y, x).
Returns
_LIBQ_Q2_13_atan2_Q7_8 returns the _Q2_13 fixed point result from the calculation atan2(y, x).
Remarks
The function _LIBQ_Q16Div is called by this routine and thus must be linked into the executable image.
Execution Time (cycles): 220 typical (22 to 250) Program Memory 288 bytes
Error <= 0.00012207 (accurate to least significant _Q2_13 bit)
Example
_Q2_13 resultAtan2;
resultAtan2 = _LIBQ_Q2_13_atan2_Q7_8 ((_Q7_8)0x589d, (_Q7_8)0xf878); //
_LIBQ_Q2_13_atan2_Q7_8(88.613281, -7.531250) = 1.655518 (0x34fa)
5.4.2.5.12.2 _LIBQ_Q2_29_atan2_Q16 Function
C
_Q2_29 _LIBQ_Q2_29_atan2_Q16(
_Q16 y,
_Q16 x
);
Description
Function _LIBQ_Q2_29_atan2_Q16:
_Q2_29 _LIBQ_Q2_29_atan2_Q16 (_Q16 y, _Q16 x);
Calculates the atan(y, x), where y and x are of type _Q16 and the resulting value is of type _Q2_29. The output value will be
radians in the range pi >= result >= -pi.
Preconditions
None.
Parameters
Parameters Description
y The _Q16 input value from which to calculate atan2(y, x).
x The _Q16 input value from which to calculate atan2(y, x).
Returns
_LIBQ_Q2_29_atan2_Q16 returns the _Q2_29 fixed point result from the calculation atan2(y, x).
Remarks
The C function __divdi3 is called by this routine and thus must be linked into the executable image.
Execution Time (cycles): 348 typical (20 to 376) Program Memory 464 bytes
Error <= 0.000000003 (accurate within one least significant _Q2_29 bit)
Example
_Q2_29 resultAtan2;
resultAtan2 = _LIBQ_Q2_29_atan2_Q16 ((_Q16)0xf6276270, x(_Q16)0x34b4b4c0); //
_LIBQ_Q2_29_atan2_Q16(-2520.615479, 13492.706055) = -0.184684 (0xfa1710c7)
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5.4.2.5.13 Random Number Functions
5.4.2.5.13.1 _LIBQ_Q15Rand Function
C
_Q15 _LIBQ_Q15Rand(
int64_t * pSeed
);
Description
Function _LIBQ_Q15Rand:
_Q15 _LIBQ_Q15Rand (int64_t *pSeed);
Generates a _Q15 pseudo-random value based on the seed supplied as a parameter. The first time this function is called, the
seed value must be supplied by the user; this initial seed value can either be constant or random, depending on whether the user
wants to generate a repeatable or a non-repeatable pseudo-random sequence.
The function updates the *pSeed value each time it is called. The updated *pSeed value must be passed back to the function
with each subsequent call.
Warning: The pseudo-random sequence generated by this function may be insufficient for cryptographic use.
Preconditions
None.
Parameters
Parameters Description
pSeed A pointer to the seed value used by the function to generate a pseudo-random
sequence.
Returns
_LIBQ_Q15Rand returns a random _Q15 value. _LIBQ_Q15Rand also updates the int64_t *pSeed value.
Remarks
Execution Time (cycles): 32 Program Memory 92 bytes
Example
// Initialize seed to a constant or random value
static int64_t randomSeed = 0xA71078BE72D4C1F1;
_Q15 randomValue;
randomValue = _LIBQ_Q15Rand(&randomSeed);
...
randomValue = _LIBQ_Q15Rand(&randomSeed);
5.4.2.5.13.2 _LIBQ_Q31Rand Function
C
_Q31 _LIBQ_Q31Rand(
int64_t * pSeed
);
Description
Function _LIBQ_Q31Rand:
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_Q31 _LIBQ_Q31Rand (int64_t *pSeed);
Generates a _Q31 pseudo-random value based on the seed supplied as a parameter. The first time this function is called, the
seed value must be supplied by the user; this initial seed value can either be constant or random, depending on whether the user
wants to generate a repeatable or a non-repeatable pseudo-random sequence.
The function updates the *pSeed value each time it is called. The updated *pSeed value must be passed back to the function
with each subsequent call.
Warning: The pseudo-random sequence generated by this function may be insufficient for cryptographic use.
Preconditions
None.
Parameters
Parameters Description
pSeed A pointer to the seed value used by the function to generate a pseudo-random
sequence.
Returns
_LIBQ_Q31Rand returns a pseudo-random _Q31 value. _LIBQ_Q31Rand also updates the int64_t *pSeed value.
Remarks
Execution Time (cycles): 32 Program Memory 88 bytes
Example
// Initialize seed to a constant or random value
static int64_t randomSeed = 0x7F18BA710E72D4C1;
_Q31 randomValue;
randomValue = _LIBQ_Q31Rand(&randomSeed);
...
randomValue = _LIBQ_Q31Rand(&randomSeed);
5.4.2.5.14 Float Functions
5.4.2.5.14.1 _LIBQ_Q15FromFloat Function
C
_Q15 _LIBQ_Q15FromFloat(
float x
);
Description
Function _LIBQ_Q15FromFloat:
_Q15 _LIBQ_Q15FromFloat(float x);
Converts a floating point value to a _Q15 fixed point representation. The _Q15 fixed point value is returned by the function. The
conversion will saturate if the value is outside the range of the _Q15 representation.
Preconditions
None.
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Parameters
Parameters Description
x The float point value to convert to _Q15 fixed point
Returns
_LIBQ_Q15FromFloat returns the _Q15 fixed point value corresponding to the floating point (float) input value.
Remarks
The C library functions __gesf2, __lesf2, __addsf3, __mulsf3, and __fixsfsi are called by this routine and thus must be linked into
the executable image.
Execution Time (cycles): 213 typical (158 to 224) Program Memory 96 bytes
Example
_Q15 q15;
q15 = _LIBQ_Q15FromFloat((float)0.5); // q15 now equals (_Q15)0x4000
q15 = _LIBQ_Q15FromFloat((float)-1.0); // q15 now equals (_Q15)0x8000
q15 = _LIBQ_Q15FromFloat((float)-0.233828); // q15 now equals (_Q15)0xe212
5.4.2.5.14.2 _LIBQ_Q31FromFloat Function
C
_Q31 _LIBQ_Q31FromFloat(
float x
);
Description
Function _LIBQ_Q31FromFloat:
_Q31 _LIBQ_Q31FromFloat(float x);
Converts a floating point value to a _Q31 fixed point representation. The _Q31 fixed point value is returned by the function. The
conversion will saturate if the value is outside the range of the _Q31 representation.
Preconditions
None.
Parameters
Parameters Description
x The floating point value to convert to _Q31 fixed point.
Returns
_LIBQ_Q31FromFloat returns the _Q31 fixed point value corresponding to the floating point (float) input value.
Remarks
The C library functions __gesf2, __lesf2, __addsf3, __mulsf3, and __fixsfsi are called by this routine and thus must be linked into
the executable image.
Execution Time (cycles): 210 typical (158 to 214) Program Memory 100 bytes
Example
_Q31 q31;
q31 = _LIBQ_Q31FromFloat((float)0.000008); // q31 now equals (_Q31)0x00004000
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q31 = _LIBQ_Q31FromFloat((float)-1.0); // q31 now equals (_Q31)0x80000000
q31 = _LIBQ_Q31FromFloat((float)0.690001); // q31 now equals (_Q31)0x5851f400
5.4.2.5.14.3 _LIBQ_ToFloatQ15 Function
C
float _LIBQ_ToFloatQ15(
_Q15 x
);
Description
Function _LIBQ_ToFloatQ15:
float _LIBQ_ToFloatQ15(_Q15 x);
Converts a _Q15 fixed point value to a floating point representation. The floating point value is returned by the function.
Preconditions
None.
Parameters
Parameters Description
x The _Q15 fixed point value to convert to float
Returns
_LIBQ_ToFloatQ15 returns the floating point (float) value corresponding to the _Q15 input value.
Remarks
The C library functions __floatsisf and __divsf3 are called by this routine and thus must be linked in to the executable image.
Execution Time (cycles): 158 typical (54 to 176) Program Memory 28 bytes
Example
float f;
f = _LIBQ_ToFloatQ15((_Q15)0x4000); // f now equals 0.5
f = _LIBQ_ToFloatQ15((_Q15)0x8000); // f now equals -1.0
f = _LIBQ_ToFloatQ15((_Q15)0xb7ff); // f now equals -0.562531
5.4.2.5.14.4 _LIBQ_ToFloatQ31 Function
C
float _LIBQ_ToFloatQ31(
_Q31 x
);
Description
Function _LIBQ_ToFloatQ31:
float _LIBQ_ToFloatQ31(_Q31 x);
Converts a _Q31 fixed point value to a floating point representation. The floating point value is returned by the function.
Preconditions
None.
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Parameters
Parameters Description
x The _Q31 fixed point value to convert to float
Returns
_LIBQ_ToFloatQ31 returns the floating point (float) value corresponding to the _Q31 input value.
Remarks
The C library functions __floatsisf and __divsf3 are called by this routine and thus must be linked in to the executable image.
Execution Time (cycles): 163 typical (54 to 176) Program Memory 28 bytes
Example
float f;
f = _LIBQ_ToFloatQ31((_Q31)0x00004000); // f now equals 0.000008
f = _LIBQ_ToFloatQ31((_Q31)0x80000000); // f now equals -1.0
f = _LIBQ_ToFloatQ31((_Q31)0x5851f42d); // f now equals 0.690001
5.4.2.5.15 String Functions
5.4.2.5.15.1 _LIBQ_Q15FromString Function
C
_Q15 _LIBQ_Q15FromString(
char * s
);
Description
Function _LIBQ_Q15FromString:
_Q15 _LIBQ_Q15FromString(char *s);
Convert an ascii string into a _Q15 fixed point value. The ascii string must be in an -N.NNNNNN format. Leading spaces are
ignored. The conversion stops at either the first non-conforming character in the string or the Null string terminator. There must
be no spaces within the string value itself.
Preconditions
None.
Parameters
Parameters Description
s A pointer to the ascii input string representing the _Q15 fixed point value.
Returns
_LIBQ_Q15FromString returns the _Q15 fixed point value represented by the input string.
Remarks
Execution Time (cycles): 296 typical (28 to 346) Program Memory 172 bytes
Example
_Q15 x;
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x = _LIBQ_Q15FromString("0.125"); // x will equal 0.125 using
// an internal value of 0x1000
x = _LIBQ_Q15FromString("-1.0"); // x will equal -1.0 using
// an internal value of 0x8000
x = _LIBQ_Q15FromString("0.999969"); // x will equal 0.999969 using
// an internal value of 0x7FFF
5.4.2.5.15.2 _LIBQ_ToStringQ15 Function
C
void _LIBQ_ToStringQ15(
_Q15 x,
char * s
);
Description
Function _LIBQ_ToStringQ15:
void _LIBQ_ToStringQ15(_Q15 x, char *s);
Convert a _Q15 fixed point value to an ascii string representation in a -N.NNNNNN format.
Preconditions
The character string "s" must be at least 10 characters long, including the Null string terminator.
Parameters
Parameters Description
x The fixed point value to be converted into an ascii string (_Q15)
s A pointer to the output string of at least 10 characters
Returns
An ascii string that represents the _Q15 fixed point value in -N.NNNNNN format. The output string will be terminated by a Null
(0x00) character.
Remarks
Execution Time (cycles): 118 typical (28 to 132) Program Memory 200 bytes
Example
char s[10];
_LIBQ_ToStringQ15((_Q15)0x1000, s); // s will equal "0.125000"
_LIBQ_ToStringQ15((_Q15)0x8000, s); // s will equal "-1.000000"
_LIBQ_ToStringQ15((_Q15)0x7FFF, s); // s will equal "0.999969"
5.4.2.5.16 Data Types and Constants
5.4.2.5.16.1 _Q15_MAX Macro
C
#define _Q15_MAX ((_Q15)0x7FFF) // Maximum value of _Q15 (~1.0)
Description
Maximum value of _Q15 (~1.0)
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5.4.2.5.16.2 _Q15_MIN Macro
C
#define _Q15_MIN ((_Q15)0x8000) // Minimum value of _Q15 (-1.0)
Description
Minimum value of _Q15 (-1.0)
5.4.2.5.16.3 _Q16_MAX Macro
C
#define _Q16_MAX ((_Q16)0x7FFFFFFF) // Maximum value of _Q16 (~32768.0)
Description
Maximum value of _Q16 (~32768.0)
5.4.2.5.16.4 _Q16_MIN Macro
C
#define _Q16_MIN ((_Q16)0x80000000) // Minimum value of _Q16 (-32768.0)
Description
Minimum value of _Q16 (-32768.0)
5.4.2.5.16.5 _Q2_13_MAX Macro
C
#define _Q2_13_MAX ((_Q2_13)0x7FFF) // Maximum value of _Q2_13 (~4.0)
Description
Maximum value of _Q2_13 (~4.0)
5.4.2.5.16.6 _Q2_13_MIN Macro
C
#define _Q2_13_MIN ((_Q2_13)0x8000) // Minimum value of _Q2_13 (-4.0)
Description
Minimum value of _Q2_13 (-4.0)
5.4.2.5.16.7 _Q2_29_MAX Macro
C
#define _Q2_29_MAX ((_Q2_29)0x7FFFFFFF) // Maximum value of _Q2_29 (~4.0)
Description
Maximum value of _Q2_29 (~4.0)
5.4.2.5.16.8 _Q2_29_MIN Macro
C
#define _Q2_29_MIN ((_Q2_29)0x80000000) // Minimum value of _Q2_29 (-4.0)
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Description
Minimum value of _Q2_29 (-4.0)
5.4.2.5.16.9 _Q3_12_MAX Macro
C
#define _Q3_12_MAX ((_Q3_12)0x7FFF) // Maximum value of _Q3_12 (~8.0)
Description
Maximum value of _Q3_12 (~8.0)
5.4.2.5.16.10 _Q3_12_MIN Macro
C
#define _Q3_12_MIN ((_Q3_12)0x8000) // Minimum value of _Q3_12 (-8.0)
Description
Minimum value of _Q3_12 (-8.0)
5.4.2.5.16.11 _Q31_MAX Macro
C
#define _Q31_MAX ((_Q31)0x7FFFFFFF) // Maximum value of _Q31 (~1.0)
Description
Maximum value of _Q31 (~1.0)
5.4.2.5.16.12 _Q31_MIN Macro
C
#define _Q31_MIN ((_Q31)0x80000000) // Minimum value of _Q31 (-1.0)
Description
Minimum value of _Q31 (-1.0)
5.4.2.5.16.13 _Q4_11_MAX Macro
C
#define _Q4_11_MAX ((_Q4_11)0x7FFF) // Maximum value of _Q4_11 (~16.0)
Description
Maximum value of _Q4_11 (~16.0)
5.4.2.5.16.14 _Q4_11_MIN Macro
C
#define _Q4_11_MIN ((_Q4_11)0x8000) // Minimum value of _Q4_11 (-16.0)
Description
Minimum value of _Q4_11 (-16.0)
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5.4.2.5.16.15 _Q5_10_MAX Macro
C
#define _Q5_10_MAX ((_Q5_10)0x7FFF) // Maximum value of _Q5_10 (~32.0)
Description
Maximum value of _Q5_10 (~32.0)
5.4.2.5.16.16 _Q5_10_MIN Macro
C
#define _Q5_10_MIN ((_Q5_10)0x8000) // Minimum value of _Q5_10 (-32.0)
Description
Minimum value of _Q5_10 (-32.0)
5.4.2.5.16.17 _Q7_8_MAX Macro
C
#define _Q7_8_MAX ((_Q7_8)0x7FFF) // Maximum value of _Q7_8 (~128.0)
Description
Maximum value of _Q7_8 (~128.0)
5.4.2.5.16.18 _Q7_8_MIN Macro
C
#define _Q7_8_MIN ((_Q7_8)0x8000) // Minimum value of _Q7_8 (-128.0)
Description
Minimum value of _Q7_8 (-128.0)
5.4.2.5.16.19 _Q0_15 Type
C
typedef int16_t _Q0_15;
Description
1 sign bit, 15 bits right of radix
5.4.2.5.16.20 _Q0_31 Type
C
typedef int32_t _Q0_31;
Description
1 sign bit, 31 bits right of radix
5.4.2.5.16.21 _Q15 Type
C
typedef _Q0_15 _Q15;
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Description
Short name for _Q0_15
5.4.2.5.16.22 _Q15_16 Type
C
typedef int32_t _Q15_16;
Description
1 sign bit, 15 bits left of radix, 16 bits right of radix
5.4.2.5.16.23 _Q16 Type
C
typedef _Q15_16 _Q16;
Description
Short name for _Q15_16
5.4.2.5.16.24 _Q2_13 Type
C
typedef int16_t _Q2_13;
Description
1 sign bit, 2 bits left of radix, 13 bits right of radix
5.4.2.5.16.25 _Q2_29 Type
C
typedef int32_t _Q2_29;
Description
1 sign bit, 2 bits left of radix, 29 bits right of radix
5.4.2.5.16.26 _Q3_12 Type
C
typedef int16_t _Q3_12;
Description
1 sign bit, 3 bits left of radix, 12 bits right of radix
5.4.2.5.16.27 _Q31 Type
C
typedef _Q0_31 _Q31;
Description
Short name for _Q_0_31
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5.4.2.5.16.28 _Q4_11 Type
C
typedef int16_t _Q4_11;
Description
1 sign bit, 4 bits left of radix, 11 bits right of radix
5.4.2.5.16.29 _Q5_10 Type
C
typedef int16_t _Q5_10;
Description
1 sign bit, 5 bits left of radix, 10 bits right of radix
5.4.2.5.16.30 _Q7_8 Type
C
typedef int16_t _Q7_8;
Description
1 sign bit, 7 bits left of radix, 8 bits right of radix
5.4.2.6 Files
Files
Name Description
libq.h Optimized fixed point math functions for the PIC32MZ microAptivTM core platform.
Description
5.4.2.6.1 libq.h
Fixed Point Library
libq.h provides a library of fixed point math functions for the PIC32MZ platform. All functions are optimized for speed. This
header file specifies characteristics of each function, including execution time, memory size, and resolution.
Signed fixed point types are defined as follows:
Qn_m where:
• n is the number of data bits to the left of the radix point
• m is the number of data bits to the right of the radix point
• a signed bit is implied
For convenience, short names are also defined:
Exact Name (# Bits) Required Short Name _Q0_15 (16) _Q15; _Q15_16 (32) _Q16; _Q0_31 (32) _Q31
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Functions in the library are prefixed with the type of the return value. For example, _LIBQ_Q16Sqrt returns a Q16 value equal to
the square root of its argument.
Argument types do not always match the return type. Refer to the function prototype for a specification of its arguments.
In cases where the return value is not a fixed point type, the argument type is appended to the function name. For example,
_LIBQ_ToFloatQ31 accepts a type _Q31 argument.
In some cases, both the return type and the argument type are specified within the function name. For example,
Function Name (Return Type) [Argument Type]: _LIBQ_Q15_sin_Q2_13 (_Q15) [_Q2_13]; _LIBQ_Q31_sin_Q2_29 (_Q31)
[_Q2_29]
Table of LIBQ functions:
Divide: _Q16 _LIBQ_Q16Div (_Q16 dividend, _Q16 divisor);
Square root: _Q16 _LIBQ_Q16Sqrt (_Q16 x);
Exponential: _Q16 _LIBQ_Q16Exp (_Q16 x);
Log: _Q4_11 _LIBQ_Q4_11_ln_Q16 (_Q16 x); _Q3_12 _LIBQ_Q3_12_log10_Q16 (_Q16 x); _Q5_10 _LIBQ_Q5_10_log2_Q16
(_Q16 x);
Power: _Q16 _LIBQ_Q16Power (_Q16 x, _Q16 y);
Sine: _Q15 _LIBQ_Q15_sin_Q2_13 (_Q2_13 x); _Q31 _LIBQ_Q31_sin_Q2_29 (_Q2_29 x);
Cosine: _Q15 _LIBQ_Q15_cos_Q2_13 (_Q2_13 x); _Q31 _LIBQ_Q31_cos_Q2_29 (_Q2_29 x);
Tangent: _Q7_8 _LIBQ_Q7_8_tan_Q2_13 (_Q2_13 x); _Q16z _LIBQ_Q16_tan_Q2_29 (_Q2_29 x);
Arcsin: _Q2_13 _LIBQ_Q2_13_asin_Q15 (_Q15 x); _Q2_29 _LIBQ_Q2_29_asin_Q31 (_Q31 x); _Q2_29
_LIBQ_Q2_29_asin_Q31_Fast (_Q31 x);
Arccos: _Q2_13 _LIBQ_Q2_13_acos_Q15 (_Q15 x); _Q2_29 _LIBQ_Q2_29_acos_Q31 (_Q31 x); _Q2_29
_LIBQ_Q2_29_acos_Q31_Fast (_Q31 x);
Arctan: _Q2_13 _LIBQ_Q2_13_atan_Q7_8 (_Q7_8 x); _Q2_29 _LIBQ_Q2_29_atan_Q16 (_Q16 x);
Arctan2: _Q2_13 _LIBQ_Q2_13_atan2_Q7_8 (_Q7_8 y, _Q7_8 x); _Q2_29 _LIBQ_Q2_29_atan2_Q16 (_Q16 y, _Q16 x);
Random number: _Q15 _LIBQ_Q15Rand (int64_t *pSeed); _Q31 _LIBQ_Q31Rand (int64_t *pSeed);
Float: float _LIBQ_ToFloatQ31 (_Q31 x); float _LIBQ_ToFloatQ15 (_Q15 x); _Q31 _LIBQ_Q31FromFloat (float x); _Q15
_LIBQ_Q15FromFloat (float x);
String: void _LIBQ_ToStringQ15 (_Q15 x, char *s); _Q15 _LIBQ_Q15FromString (char *s);
Functions
Name Description
_LIBQ_Q15_cos_Q2_13 Calculates the value of cosine(x).
_LIBQ_Q15_sin_Q2_13 Calculates the value of sine(x).
_LIBQ_Q15FromFloat Converts a float to a _Q15 value.
_LIBQ_Q15FromString Ascii to _Q15 conversion.
_LIBQ_Q15Rand Generate a _Q15 random number.
_LIBQ_Q16_tan_Q2_29 Calculates the value of tan(x).
_LIBQ_Q16Div _Q16 fixed point divide.
_LIBQ_Q16Exp Calculates the exponential function e^x.
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_LIBQ_Q16Power Calculates the value of x raised to the y power (x^y).
_LIBQ_Q16Sqrt Square root of a positive _Q16 fixed point value.
_LIBQ_Q2_13_acos_Q15 Calculates the value of acos(x).
_LIBQ_Q2_13_asin_Q15 Calculates the asin value of asin(x).
_LIBQ_Q2_13_atan_Q7_8 Calculates the value of atan(x).
_LIBQ_Q2_13_atan2_Q7_8 Calculates the value of atan2(y, x).
_LIBQ_Q2_29_acos_Q31 Calculates the value of acos(x).
_LIBQ_Q2_29_acos_Q31_Fast Calculates the value of acos(x). This function executes faster than
_LIBQ_Q2_29_acos_Q31 but is less precise.
_LIBQ_Q2_29_asin_Q31 Calculates the value of asin(x).
_LIBQ_Q2_29_asin_Q31_Fast Calculates the value of asin(x). This function executes faster than the
_LIBQ_Q2_29_asin_Q31 function, but is less precise.
_LIBQ_Q2_29_atan_Q16 Calculates the value of atan(x).
_LIBQ_Q2_29_atan2_Q16 Calculates the value of atan2(y, x).
_LIBQ_Q3_12_log10_Q16 Calculates the value of Log10(x).
_LIBQ_Q31_cos_Q2_29 Calculates the value of cosine(x).
_LIBQ_Q31_sin_Q2_29 Calculates the value of sine(x).
_LIBQ_Q31FromFloat Converts a float to a _Q31 value.
_LIBQ_Q31Rand Generate a _Q31 random number.
_LIBQ_Q4_11_ln_Q16 Calculates the natural logarithm ln(x).
_LIBQ_Q5_10_log2_Q16 Calculates the value of log2(x).
_LIBQ_Q7_8_tan_Q2_13 Calculates the value of tan(x).
_LIBQ_ToFloatQ15 Converts a _Q15 value to a float.
_LIBQ_ToFloatQ31 Converts a _Q31 value to a float.
_LIBQ_ToStringQ15 _Q15 to ascii conversion.
Macros
Name Description
_Q15_MAX Maximum value of _Q15 (~1.0)
_Q15_MIN Minimum value of _Q15 (-1.0)
_Q16_MAX Maximum value of _Q16 (~32768.0)
_Q16_MIN Minimum value of _Q16 (-32768.0)
_Q2_13_MAX Maximum value of _Q2_13 (~4.0)
_Q2_13_MIN Minimum value of _Q2_13 (-4.0)
_Q2_29_MAX Maximum value of _Q2_29 (~4.0)
_Q2_29_MIN Minimum value of _Q2_29 (-4.0)
_Q3_12_MAX Maximum value of _Q3_12 (~8.0)
_Q3_12_MIN Minimum value of _Q3_12 (-8.0)
_Q31_MAX Maximum value of _Q31 (~1.0)
_Q31_MIN Minimum value of _Q31 (-1.0)
_Q4_11_MAX Maximum value of _Q4_11 (~16.0)
_Q4_11_MIN Minimum value of _Q4_11 (-16.0)
_Q5_10_MAX Maximum value of _Q5_10 (~32.0)
_Q5_10_MIN Minimum value of _Q5_10 (-32.0)
_Q7_8_MAX Maximum value of _Q7_8 (~128.0)
_Q7_8_MIN Minimum value of _Q7_8 (-128.0)
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Types
Name Description
_Q0_15 1 sign bit, 15 bits right of radix
_Q0_31 1 sign bit, 31 bits right of radix
_Q15 Short name for _Q0_15
_Q15_16 1 sign bit, 15 bits left of radix, 16 bits right of radix
_Q16 Short name for _Q15_16
_Q2_13 1 sign bit, 2 bits left of radix, 13 bits right of radix
_Q2_29 1 sign bit, 2 bits left of radix, 29 bits right of radix
_Q3_12 1 sign bit, 3 bits left of radix, 12 bits right of radix
_Q31 Short name for _Q_0_31
_Q4_11 1 sign bit, 4 bits left of radix, 11 bits right of radix
_Q5_10 1 sign bit, 5 bits left of radix, 10 bits right of radix
_Q7_8 1 sign bit, 7 bits left of radix, 8 bits right of radix
File Name
libq.h
Company
Microchip Technology Inc.
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5.5 Operating System Abstraction Layer (OSAL)
Library Help
5.5.1 Introduction
OSAL Library
for
Microchip Microcontrollers
The Operating System Abstraction Layer (OSAL) provides a consistent interface to an application and parts of MPLAB Harmony
that allow them to take advantage of Operating System constructs when running in an OS environment OR when operating
without one. It is designed to allow operation of MPLAB Harmony on any Microchip microcontroller and takes care of the
underlying differences between the available OS Kernels or when no kernel is present.
Description
The OSAL provides the interface to commonly available RTOSes such that drivers and middleware (and optionally, applications)
may be written using a single interface to a minimal set of OS-specific features needed to provide thread safety. The OSAL
interface can be implemented appropriately to support almost any desired RTOS. For applications where no RTOS is available,
or desired, a bare version of the OSAL supports either polled or interrupt-driven environments running directly on the hardware.
This allows applications and the MPLAB Harmony stack to be executed in all three common embedded environments: polled
(shared multi-tasking), interrupt-driven, or RTOS-based.
Scope
The OSAL is not designed to replace a commercial kernel and therefore the user is encouraged to use any of the specific
features of their chosen RTOS in order to achieve best performance. As such the OSAL can also be considered to be an
Operating System Compatibility Layer offering MPLAB Harmony and users the required common functions to ensure that
MPLAB Harmony will correctly compile and operate in both RTOS and non-RTOS environments.
The common interface presented by the OSAL is designed to offer a set of services typically found on micro-kernel and
mini-scheduler systems. Because of this it has no aspirations to provide an equivalent set of capabilities as those found on large
multi-tasking systems such as uCLinux. The common services are designed to allow MPLAB Harmony to implement thread-safe
Drivers and Middleware. The design intention is that drivers will use the minimal set of OSAL features necessary to ensure that
they can safely operate in a multi-threaded environment yet can also compile correctly when no underlying RTOS is present. The
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range of features used by a driver is typically limited to these OSAL features:
• Semaphore Functions
• Mutexe Functions
• Critical Section Functions
5.5.2 Release Notes
MPLAB Harmony Version: v0.70b OSAL Library Version : 0.1 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Three OSAL implementations:
• OSAL_USE_NONE - Default implementation of the OSAL that includes no RTOS functionality and features only sufficient
code to ensure that elements of MPLAB Harmony that make OSAL calls will compile correctly. 'Safe' parameters and #defines
have been used so that MPLAB Harmony drivers will compile correctly.
• OSAL_USE_BASIC - Minimal OSAL implementation not designed to operate in multi-threaded environments but offers some
usable features so that interrupt driven applications can still compile and operate correctly. Minimal implementations include
Events, Semaphores and Mutexes.
• OSAL_USE_RTOS - An RTOS is being used and the relevant RTOS header file will be included in the sys_config.h file.
Currently a reference implementation of the FreeRTOS(tm) and Micrium uC/OSIII operating systems have been implemented.
Other operating systems implementations are under development.
Known Issues:
Nothing to report in this release.
5.5.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.5.4 Using the Library
This topic describes the basic architecture of the OSAL Library and provides information and examples on how to use it.
Description
Interface Header File: osal.h
The interface to the OSAL Library is defined in the "osal.h" header file. Any C language source (.c) file that uses the OSAL
System Service library should include "osal.h".
Library File: osal.c OR osal_xxxx.c
The OSAL Library consists of a base implementation and individual ports of the OSAL to target operating systems. These target
operating systems consist of a basic implementation (used when the macro OSAL_USE_BASIC is defined) and ports of third
party RTOSs (used when the macro OSAL_USE_RTOS is defined).
If no RTOS support is required then the file "osal.c" can be optionally included into the project; however, it is not required. This
file provides implementations for the OSAL_USE_BASIC and configurations of the library.
When an RTOS is being used (the OSAL_USE_RTOS configuration) then an external implementation file which provides the
required interface wrappers should be added to the project. For instance for the FreeRTOS operating system the file
"osal_freertos.c" should be added, whilst for the Micrium uC/OS-III operating system the file "osal_micrium.c" should be added.
The base implementation and some generic ports are provided with the Library however it is the responsibility of third party
vendors to supply the correctly implemented interface file.
Please refer to the MPLAB Harmony Overview for how the OSAL Library interacts with the framework.
5.5.4.1 Abstraction Model
The OSAL Library provides a predefined set of functions and types that match those services that an RTOS will typically provide.
It is designed to be a lightweight model and deliberately excludes the much broader depth and breadth of services that a fully
fledged RTOS provides. As such the interface defines only those core functions necessary for the MPLAB Harmony Drivers and
middleware to operate in a multi-threaded environment AND some additional functionality to support RTOS independent
development of middleware and user applications in the future.
Description
The common interface can easily be ported to many host RTOSs by third parties and the set of functions provides a basic level
of RTOS compatibility. Where a specific RTOS does not implement a given architectural feature (e.g., events), the OSAL port for
that RTOS should endeavor to imitate that feature using the constructs that are available. Although it is recognized that this may
have a detrimental effect on the performance of that system it does allow MPLAB Harmony developers the broadest scope for
using RTOS features in their designs.
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Include Hierarchy of osal.h
5.5.4.2 Library Overview
This section provides an overview of the OSAL Library.
Description
Refer to the section System Services Overview for how the system services operates in a system.
The OSAL Library provides a defined interface such that driver and middleware developers will be able to create MPLAB
Harmony code that can safely operate in a multi-threaded environment when a supported RTOS is present yet will still compile
and function correctly when MPLAB Harmony is being used in a non-RTOS environment with an interrupt or non-interrupt driven
application model.
The defined interface will help application developers during the early stages of their design when various platforms and
architectures are still under consideration. The developer is encouraged to use the specific features of a chosen RTOS once it
has been selected since this is likely to provide a more effective and rich programming environment.
The OSAL Library is deliberately designed to be a thin layer over an underlying RTOS which presents a predefined interface to
the common features used by the majority of RTOSes, which includes:
Library Interface Section Description
Semaphore Functions Binary and counting semaphores for inter thread communications.
Queue Functions Arbitrary queue mechanism with pass by copy.
Mutex Functions Thread and resource locking mechanism.
Critical Section Functions Application and scheduler locking mechanism.
Thread Functions Basic thread creation and control.
Interrupt Handling Functions ISR primitives to allow RTOS calls from within an ISR context.
Error Handling Functions Simple error handling.
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Memory Allocation Functions Memory allocation primitives or wrappers.
OSAL Control Functions OS initialization and start-up.
One of the primary design guidelines is that a host operating system may not be present and so any operations that the OSAL
presents are designed to compile out to safe default values if no RTOS is present. This can mean the following:
• Implementing a dummy function that mimics typical RTOS behavior
• Implementing a #define or inline function that returns a 'safe' generic return value, such as 'TRUE' or 'Call succeeded'
• Returning a OSAL_RESULT_NOT_IMPLEMENTED value to indicate an unsupported operation
• Throwing an ASSERT failure to indicate a terminal error that prevents operation under specific circumstances
5.5.4.3 How the Library Works
This section provides information on how the OSAL Library works.
5.5.4.3.1 Core Functionality
The OSAL Library implements a lightweight abstraction layer on top of a host operating system. The OSAL functionality is
designed to allow a programmer access to typical RTOS based functions than can reasonably be expected to exist on a small
kernel or micro-scheduler typically found on the target Microchip Microcontrollers.
The OSAL is designed to be compiled under three specific mutually exclusive operating modes:
Compilation Mode Description
OSAL_USE_NONE No RTOS or OSAL support is provided. The OSAL interface functions will compile to 'nothing' or are
defined to have no value.
OSAL_USE_BASIC Basic level of support. There is no underlying RTOS however certain facilities are replicated such as
Semaphores and Mutexes.
OSAL_USE_RTOS A full implementation of the OSAL interface is available and there is an underlying RTOS as part of the
program.
In the absence of any one of these values being defined or passed into the compiler as a command line parameter then the
OSAL will default to the OSAL_USE_NONE mode of operation.
The following conceptual diagram shows the common interface and how the individual implementations are derived depending
upon the configured mode of compilation.
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The OSAL interface makes extensive use of object handles when passing RTOS parameters around the various functions. This
has been done since depending on the operating mode and underlying RTOS (if any) there may be substantial differences
between the C types of the variables. For instance, in the basic implementation mode a semaphore is implemented as a single
8-bit quantity to ensure atomic access on all architectures. On a third party RTOS the same semaphore may be implemented as
a 16-bit index into an array of pointers whilst on another RTOS it could be represented as a size_t pointer (a pointer to the basic
word type for that architecture). Because of these differences, the most convenient mechanism to maintain a regular interface is
by the use of handles to implementation defined variables.
The majority of the OSAL objects also provide a OSAL_XXX_Delete function. This is provided for completeness however care
should be taken in its use. Many RTOS implementations do not provide the ability to delete an object and excessive use of the
delete can lead to memory fragmentation and unpredictable system behavior. It is recommended that it is not used at this time,
or if used, the return value should be checked for a possible failure to delete the object.
In the following sections the basic behavior of the supported functions are documented. For the purposes of documentation the
assumed operation mode will be that a full RTOS is present and so the behavior is that which will be observed in that scenario.
5.5.4.3.2 Other Functionality
5.5.4.3.3 Thread Operation
The OSAL implements a simple threading model that assumes the use of a priority based pre-emptive scheduler.
Description
Each thread is implemented as a single C function which can be reused across multiple threads if desired. For this reason care
should be taken if static variables are allocated within the thread function.
The priority of a thread is defined using higher values to indicate higher priority. Thread priorities range from 1 up to the
application defined value OSAL_CONFIG_MAX_PRIORITIES minus 1 . No importance is placed upon any specific value of
priority other than that a thread with a higher priority will execute before a lower priority one if they are both in the ready state.
Certain RTOS implementations may require threads to each have a unique priority; however, since MPLAB Harmony has no
knowledge of the various ways in which libraries may be connected together it is not possible to define any fixed priorities. The
application programmer is therefore responsible for ensuring the relative priority of threads.
It is assumed that each thread is created with its own stack and that the RTOS is responsible for the correct allocation of
memory resources. The requested memory size is specified in bytes and its value is normally arrived at by inspection of the
program, the underlying hardware architecture (16-/32-bits) and the total available memory.
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No significance is placed upon the textual name given to a task and it is normally only used for diagnostic purposes.
The following diagram shows the sequence of states that a typical RTOS will move a given task through during its lifetime.
The pdata parameter passed during thread creation allows the application programmer to generate more sophisticated behavior
based upon passing a configuration parameter to a thread. The thread can be created multiple times and perform per instance
operations related to the passed parameter.
The phandle parameter allows the created threads handle to be passed back to the calling code allowing later manipulation of
the thread by other parts of the program.
Example Code:
/* Create the application thread for this test harness. This example thread
* replicates the functionality of the ADC data logger thread
* The priority of the application task should be selected as a middle value
* since the check tasks are manipulated above and below this priority level */
OSAL_THREAD_Create(APP_Tasks, "APP", 500, OTH_APP_THREAD_PRIORITY, NULL, NULL);
The OSAL supports the creation of daemon threads which are designed to allow multi-threaded drivers with their own task
routine to operate with an underlying RTOS. The OSAL_THREAD_CreateDaemon function takes a single parameter, which is
the name of the Daemon thread. The user is responsible for implementing the Daemon thread as appropriate for their system.
This thread should then call the individual driver state machines ensuring that they continue to operate. For example, consider
the following scenario:
1. The application uses a driver that has no tasks routine although it does use driver tasks called as a result of an interrupt.
2. The application also uses a driver with a state machine that needs calling every 500 us.
3. The application also uses two more drivers that can conveniently be called one after the other (perhaps it is the same driver
but with two instantiations) and only needs processing every 100 ms.
For item 1, no Deamon thread is required. For item 2, a Daemon thread is required that calls the driver task routine and then
sleeps for 500 us. For the remaining driver, a single Daemon thread can be created that calls the driver twice (with different
object handles) and then sleeps for 100 ms.
5.5.4.3.4 Events
The event mechanism is based upon a single boolean value that can be set or reset by a thread. Multiple threads may pend (or
block) waiting on the value to be set or flagged.
The OSAL implementation of events is extremely basic and no combinatorial operations are available. Furthermore, whilst
multiple threads may block on the event, only the highest priority thread will be released by the event being flagged.
It is strongly suggested that developers consider the use of queues or semaphores for inter process communication or
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sequencing since they provide a more deterministic response time than multiple event flags.
5.5.4.3.5 Semaphores
The semaphore implements a method for thread synchronization. This synchronization can be either between one thread and
another or between an interrupt service routine (ISR) and a thread. A semaphore once signalled will unblock the highest priority
thread currently pending on it.
Description
A semaphore can be used to lock a shared resource, although it is more normal to use a mutex for such an activity. Once
obtained a semaphore should be posted back to enable it to be re-taken at a later time or in another thread.
/* mainline code prior to OS start */
/* declare a variable of type semaphore handle */
OSAL_SEM_DECLARE(semSync);
/* create the semaphore */
OSAL_SEM_Create(&semSync, OSAL_SEM_TYPE_BINARY, 0, 0);
/* thread one */
...
/* take the semaphore without waiting */
OSAL_SEM_Pend(semSync, 0);
... perform some actions
/* return the semaphore */
OSAL_SEM_Post(semSync);
...
/* thread two must not execute until thread one has finished its operations*/
...
/* block on the semaphore */
OSAL_SEM_Pend(semSync, OSAL_WAIT_FOREVER);
... perform some more actions
/* return the semaphore */
OSAL_SEM_Post(semSync);
A semaphore can be signalled multiple times and so provides a method for an ISR to release a thread waiting on it. Even though
the blocked thread never returns the semaphore, because the asynchronous ISR repeatedly posts it the next time the thread
wants to pend on the semaphore it will be available. By moving the majority of interrupt service processing from the ISR to a high
priority thread the system response time is improved and the eventual processing can take advantage of OSAL features such as
mutexes and queues which would normally be harder to implement inside the ISR. This technique is known as deferred interrupt
processing.
/* an example interrupt handler called from an ISR that performs task synchronization using a
semaphore */
void _ISRTasksRX(void) /* N.B. pseudo-code ISR */
{
...
_DRV_USART_InterruptSourceStatusClear(_DRV_USART_GET_INT_SRC_RX(_DRV_USART_OBJ(dObj,
rxInterruptSource)));
/* Release the receive semaphore unblocking any tasks */
OSAL_SEM_PostISR(_DRV_USART_OBJ(dObj, rxSemID));
} /* DRV_USART_TasksRX */
5.5.4.3.6 Mutex Operation
A mutex or mutual exclusion is used to protect a shared resource from access by multiple threads at the same time. A shared
resource may be a common data structure in RAM or it may be a hardware peripheral. In either case a mutex can be used to
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ensure the integrity of the entire resource by only allowing one thread to access it at a time.
Description
The program must be written in such a way that before the shared resources is accessed the mutex has to be obtained. Once
obtained the accesses should occur, and once complete the mutex should then be released. While no restrictions are enforced
the sequence of operations between the lock and unlock should ideally take as few lines of code as possible to ensure good
system performance.
The mutex may be implemented as a form of binary semaphore but an underlying RTOS will often add other features. It is
normal to add the restriction that a mutex may only be unlocked from the thread that originally obtained the lock in the first place.
The RTOS may also provide features to mitigate priority inversion problems (where a high priority thread blocks on a lower
priority one holding a mutex) by providing priority inheritance allowing lower priority threads to be temporarily raised to complete
and release a locked mutex.
/* perform operations on a shared data structure */
struct myDataStructure {
uint16_t x;
uint8_t y;
} myDataStructure;
...
OSAL_MUTEX_DECLARE(mutexDS);
OSAL_MUTEX_Create(&mutexDS);
...
/* wait 2 seconds to obtain the mutex */
if (OSAL_MUTEX_Lock(mutexDS, 2000) == OSAL_RESULT_TRUE)
{
/* operate on the data structure */
myDataStructure.x = 32;
OSAL_MUTEX_Unlock(mutexDS);
}
5.5.4.3.7 Queue Operation
This section describes the implementation of queues using the OSAL Library.
Description
The OSAL implements queues as a fixed structure of elements, with each element the same size. The size and number of each
element is defined when the queue is created but cannot be reconfigured later. Elements are added to the queue when using the
Add function call and removed on a first-in-first-out basis when using the Remove function. If the queue is full at the time of
attempting to add data, the call will block for the specified time before failing. Data placed on the queue is done using a copy
operation so that the source may be over written if required. For large data items it may be better to pass pointers to the data via
the queue however care must be taken on ownership once the pointer has been copied between threads.
It is possible to place an item at the front of a queue using the AddHead function. Since the implementation of this is heavily
dependent upon the underlying RTOS the call may return with OSAL_RETURN_NOT_IMPLEMENTED if this operation is not
possible.
/* Create a queue */
OSAL_QUEUE_Declare(myQueue);
...
/* create a queue that accepts 1 byte chars and is 4 items long */
OSAL_QUEUE_Create(&myQueue, 1, 4);
/* Add data */
char c = 'A';
OSAL_QUEUE_Add(myQueue, &c, 0);
c = 'B';
OSAL_QUEUE_Add(myQueue, &c, 0);
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c = 'C';
OSAL_QUEUE_Add(myQueue, &c, 0);
/* remove data */
char d;
OSAL_QUEUE_Remove(myQueue, &d, OSAL_WAIT_FOREVER);
5.5.4.3.8 Critical Section Operation
This section describes how critical sections are used.
Description
Critical sections are used to form sequences of code that must operate in an atomic manner. The interface allows for the
possibility of two types of critical section.
• When the critical section is entered all interrupts on the microcontroller are disabled. This prevents the protected sequence of
code from being interrupted and ensures the complete atomicity of the operation. This is denoted by the
OSAL_CRIT_TYPE_HIGH value.
• When the critical section is entered the RTOS scheduler is disabled. In this second case other threads are prevented from
running however interrupts can still occur which allows any asynchronous events to still be received and for the temporal
accuracy of the RTOS scheduler to be maintained. This is denoted by the the OSAL_CRIT_TYPE_LOW value,
Since the behavior in the two cases is different the type of critical section must be identified in both the call to enter and leave.
/* enter and leave a critical section disabling interrupts */
OSAL_CRIT_Enter(OSAL_CRIT_TYPE_HIGH);
/* perform an atomic sequence of code */
...
/* leave the critical section */
OSAL_CRIT_Leave(OSAL_CRIT_TYPE_HIGH);
The underlying RTOS may not support the second scenario, in which case the OSAL implementation will default to disabling all
interrupts.
5.5.4.3.9 Interrupt Operation
This section describes interrupt handling by the OSAL Library.
Description
Interrupt handling in the OSAL is implemented using a separate set of interrupt-only functions. Within MPLAB Harmony,
interrupts are deemed to be handled at an application level,meaning the initial interrupt handler or vector is dealt with while
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writing the application rather than defaulting to MPLAB Harmony provided handlers. However, within MPLAB Harmony there
may be functions that are called within the context of an ISR and also during mainline program flow depending on whether
MPLAB Harmony has been built with interrupt or polled drivers. Because of this, to allow the most flexible and adaptable OSAL
implementation, the following call sequence should be performed.
1. At the application interrupt handler level, immediately after the interrupt has been entered and before any further calls are
made, call OSAL_ISR_Enter().
2. Once inside the ISR OR inside any descendent functions called as a result of entering the ISR ensure that only
OSAL_XXX_xxxxISR variants of functions are called.
3. At the exit point(s) of the ISR call OSAL_ISR_Exit().
By following this sequence of operations, the OSAL can be made to adapt to the requirements of different underlying RTOS
architectures.
In the main ISR handler:
void __ISR ( _TIMER_1_VECTOR ) _InterruptHandler_TMR_1_stub ( void )
{
OSAL_ISR_Enter();
/* Call the timer driver's "Tasks" routine */
DRV_TMR_Tasks ( appDrvObject.tmrObject );
OSAL_ISR_Exit();
}
In the called function:
void _DRV_TMR_MAKE_NAME( Tasks )
(
_DRV_TMR_DYN_ARG( SYS_MODULE_OBJ object )
)
{
...
/* Clear Timer Interrupt/Status Flag */
_DRV_TMR_InterruptSourceClear( _DRV_TMR_GET_INT_SRC( _DRV_TMR_OBJ(dObj, interruptSource) )
);
/* release a semaphore, note use of ISR variant */
OSAL_SEM_PostISR(&semTMR);
} /* DRV_TMR_Tasks */
It is not appropriate (or logical) to block inside an ISR so all variants of the OSAL functions with ISR at the end do not take a
block time parameter. The use of ISR specific versions of OSAL functions is dependent on the RTOS; however, if the xxxISR
variants are used by default inside any ISRs, the actual implementation of the interface on a given RTOS can be allowed to
handle the complexities on that specific platform.
5.5.4.3.10 Error Operation
This section describes error handling within an OSAL function.
Description
If an error occurs within an OSAL function or inside the underlying RTOS, the OSAL_ErrorCallback function will be called. This
callback function is declared as a _weak_ function and the programmer can override it to provide application specific error
handling. Currently, only a few error codes are listed and it is normally difficult to provide any kind of constructive recovery from
an internal error. The default course of action is to either block and indicate the condition using some visual means or to perform
a processor reset.
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/* user implementation of the error callback */
void OSAL_ErrorCallback(OSAL_ERROR_CALLBACK_TYPE type)
{
while (1)
{
// a non recoverable error occurred so loop here
BlinkLED();
}
}
5.5.4.3.11 Memory Operation
The OSAL Library provides an interface to a memory allocation mechanism. The memory required for dynamic instantiation of
variables is normally provided by allocating it from the heap. However the standard C library implementation of malloc and free
are not considered thread safe and so OSAL specific functions must be used if MPLAB Harmony or the application requires
dynamic memory during operation.
When operating without an underlying RTOS the OSAL memory allocators default to using standard malloc and free functions.
However, when operating with an RTOS the calls will defer to the specific scheme used by the RTOS. This may involve multiple
memory pools or it may simply involve adding a critical section around calls to malloc and free. It is left to the implementation to
define the most appropriate scheme.
/* allocate a large buffer */
uint8_t* buffer;
buffer = OSAL_Malloc(8000);
if (buffer != NULL)
{
... manipulate the buffer
/* free the buffer */
OSAL_Free(buffer);
buffer = NULL;
}
5.5.4.3.12 OSAL Operation
This section describes OSAL control features.
Description
When the OSAL is using an underlying RTOS it may be necessary to allow the RTOS to perform one-time initialization before
any calls to it are made. For instance, the RTOS might implement multiple memory pools for managing threads, queues and
semaphores and it must be given the chance to create these pools before any of the objects are created. For this reason the
application program should call OSAL_Initialize() early on and certainly before any MPLAB Harmony Drivers or middleware is
initialized (since these may also create OSAL objects at creation time).
Once the OSAL is initialized and any other remaining parts of the system are configured correctly, the OSAL can be entered with
OSAL_Start(). There is no expectation that control will be returned from this function and any return is likely to indicate a fault
condition.
5.5.5 Configuring the Library
The configuration of the OSAL Library is based on the file sys_config.h
This header file contains the configuration selection for the OSAL Library. Based on the selections made, the OSAL will support
or not support selected features.
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This header can be placed anywhere, the path of this header needs to be present in the include search path for a successful
build. Refer to the Applications Overview section for more details.
Description
To configure the OSAL the compilation mode needs to be selected. Three options are currently supported and these define the
implementation details for the OSAL. In all cases the same interface is present; however, the functionality at the varying levels
will be different or not supported. Only one of these #define statements should be specified, and this can be either done in a
common location (such as sysconfig.h) or on the build tool command line.
Compilation Mode Description
OSAL_USE_NONE No RTOS or OSAL support is provided. The OSAL interface functions will compile to 'nothing' or are
defined to have no value.
OSAL_USE_BASIC Basic level of support. There is no underlying RTOS; however, certain facilities are replicated such as
Semaphores and Mutexes.
OSAL_USE_RTOS A full implementation of the OSAL interface is available and there is an underlying RTOS as part of the
program.
5.5.5.1 Initialization Overrides
This section provides information for overriding OSAL initialization.
Description
The OSAL requires minimal configuration. In the case of the OSAL_USE_NONE and OSAL_USE_BASIC all of the configuration
required is provided by the standard "osal.h" include file. When a particular RTOS is being used then additional OSAL
configuration parameters should be placed in "sys_config.h".
The primary requirement is to include the relevant interface implementation for the selected RTOS being used. This file will
contain the mappings from OSAL interface types to types relevant for the chosen RTOS.
/* included the name of the port specific interface file */
#include "osal_.h"
Configuration parameter to define the maximum number of unique priority levels that a thread may take.
Configuration Parameter Purpose
OSAL_MAX_PRIORITIES Maximum number of thread priority levels allowed in the application. The assignable
priorities for a thread are assumed to run from 1 to OSAL_MAX_PRIORITIES - 1. Some
underlying RTOSs may permit multiple threads at the same priority level (implementing
a round-robin scheduling) so the total number of threads may actually be higher than the
defined value. This is an application design decision.
If the application is to support multi-threaded drivers with Daemon threads then the stack size and priority of the these should be
defined using the following macros:
Configuration Parameter Purpose
OSAL_DAEMON_STACK_SIZE Number of bytes to allocate to a daemon thread. These threads are likely to be small and
require small stacks although the exact size depends on the architecture. Any OSAL port
should implement safe defaults. Typical values are 800 bytes for a PIC32 or 300 for a PIC24.
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OSAL_DAEMON_PRIORITY Default priority of a daemon thread. Since these threads are typically calling MPLAB Harmony
drivers and middleware their priority should be higher than the majority of the application in
order to keep them from suffering driver starvation. The most appropriate value is left to the
programmer to decide.
5.5.5.2 Others
Drag and Drop other configuration options
5.5.5.3 Examples - Sample Functionality
Example sys_config.h fragment:
// *****************************************************************************
// *****************************************************************************
// Section: Application Configuration
// *****************************************************************************
// *****************************************************************************
/* These definitions select the configuration options for the application
*/
/* configure the priorities and stack sizes for the daemon tasks */
#define OSAL_DAEMON_STACK_SIZE 800
#define OSAL_DAEMON_PRIORITY 4
/* configure the maximum number of priorities in this application */
#define OSAL_CONFIG_MAX_PRIORITIES 31
/* declare the daemon tasks used by the OSAL to implement driver tasks */
extern void osalDaemon1(void* pv);
extern void osalDaemon2(void* pv);
/* Include the port specific OS implementation files. The file is required to
* create an implementation layer for the selected OS. This include will be
* changed depending on the required OS being used */
#include "osal_freertos.h"
5.5.6 Building the Library
This section list the files that are available in the \src of the OSAL Library. It lists which files need to be included in the build
based on either a hardware feature present on the board or configuration option selected by the system.
Files
Name Description
osal.c Bare metal implementation of OSAL functions
Description
As additional implementations of the OSAL Library are added to MPLAB Harmony, their interface files may be added to the \src
directory. Since many RTOS vendors offer their products as a commercial and licensed offering it is likely that considerably more
source files will be required than just the "osal_xxxx.c" file. These RTOS source files will be placed inside directories specific to
the manufacturer and instructions on how to add them to a MPLAB Harmony project will be provided by the supplier.
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Summary
if you are building using the default OSAL Library and have selected the OSAL_USE_NONE or OSAL_USE_BASIC compilation
options then only "osal.c" needs to be added to the project. However, if a specific RTOS is being targeted and
OSAL_USE_RTOS is selected, the port specific implementation file will need to be added to the project along with the files for
that vendor.
5.5.6.1 osal.c
Basic OSAL compatibility layer.
This file contains functional implementations of the bare metal OSAL. Where it is logical and possible to implement non threading
versions of the common function calls they have been implemented here directly or in the osal.h file as macros. If it is not
possible, or logical, to implement a feature WITHOUT an RTOS present, the the matching definition in osal.h will be set to a
NULL (or empty) implementation.
File Name
osal.c
5.5.7 Library Interface
Data Types and Constants
Name Description
OSAL_MUTEX_HANDLE_TYPE Handle to a mutex, this is the default implementation and may be overridden in
an actual implementation file
OSAL_QUEUE_HANDLE_TYPE Handle to a queue, this is the default implementation and may be overridden in
an actual implementation file
OSAL_SEM_HANDLE_TYPE Handle to a semaphore, this is the default implementation and may be
overridden in an actual implementation file
OSAL_THREAD_HANDLE_TYPE Handle to a thread, this is the default implementation and may be overridden in
an actual implementation file
OSAL_USE_NONE This is macro OSAL_USE_NONE.
OSAL_WAIT_FOREVER Default value indicating block forever
OSAL_RESULT Enumerated type representing the general return value from OSAL functions.
OSAL_SEM_TYPE Enumerated type respresenting the possible types of semaphore.
Critical Section Functions
Name Description
OSAL_CRIT_Enter Enters a critical section with the specified severity level.
OSAL_CRIT_Leave Leaves a critical section with the specified severity level.
OSAL_CRIT_TYPE Enumerated type respresenting the possible types of critical section.
Error Handling Functions
Name Description
OSAL_ERROR_CALLBACK_TYPE Enumerated type respresenting the possible types of callback message.
OSAL_ErrorCallback Lightweight error handling callback function for the RTOS.
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Interrupt Handling Functions
Name Description
OSAL_ISR_Enter Informs the OSAL and RTOS that an ISR is being entered.
OSAL_ISR_Exit Informs the OSAL and RTOS that an ISR is being exited.
Memory Allocation Functions
Name Description
OSAL_Free Deallocates a block of memory and return to the default pool.
OSAL_Malloc Allocates memory using the OSAL default allocator.
Mutex Functions
Name Description
OSAL_MUTEX_Create Creates a mutex.
OSAL_MUTEX_Delete Deletes a mutex.
OSAL_MUTEX_Lock Locks a mutex.
OSAL_MUTEX_Unlock Unlocks a mutex.
OSAL_MUTEX_DECLARE Declares an OSAL mutex.
OSAL Control Functions
Name Description
OSAL_Initialize Performs OSAL initialization.
OSAL_Name Obtains the name of the underlying RTOS.
OSAL_Start Starts the underlying RTOS
Queue Functions
Name Description
OSAL_QUEUE_DECLARE Declares an OSAL queue.
OSAL_QUEUE_Add Addd the specified item to the queue with a time-out if the queue is full.
OSAL_QUEUE_AddHead Adds the specified item to the front of the queue with a timeout if the queue is full.
OSAL_QUEUE_AddHeadISR Adds the specified item to the front of the queue from within an ISR.
OSAL_QUEUE_AddISR Adds the specified item to the queue from with an ISR.
OSAL_QUEUE_Create Creates a queue with the specified width and depth.
OSAL_QUEUE_Delete Deletes an OSAL_QUEUE.
OSAL_QUEUE_Peek Copys the item at the head of the queue but leave it on the queue. If the queue is
empty, it will block up to waitMS.
OSAL_QUEUE_PeekISR Copys the item at the head of the queue but leaves it on the queue.
OSAL_QUEUE_Remove Removes the item at the head of the queue. If the queue is empty it will block up
to waitMS.
OSAL_QUEUE_RemoveISR Removes the item at the head of the queue.
Semaphore Functions
Name Description
OSAL_SEM_Create Creates an OSAL Semaphore.
OSAL_SEM_Delete Deletes an OSAL Semaphore.
OSAL_SEM_GetCount Returns the current value of a counting semaphore.
OSAL_SEM_Pend Waits on a semaphore. Returns true if the semaphore was obtained within the
time limit.
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OSAL_SEM_Post Posts a semaphore or increments a counting semaphore.
OSAL_SEM_PostISR Posts a semaphore or increments a counting semaphore from within an Interrupt
Service Routine (ISR).
OSAL_SEM_DECLARE Declares an OSAL semaphore.
Thread Functions
Name Description
OSAL_THREAD_FUNCTION Functions that will operate as a separate thread under the OSAL should match
this type.
OSAL_THREAD_Create Creates an OSAL thread with the specified parameters.
OSAL_THREAD_CreateDaemon Creates a Daemon thread for use with multi-threaded Harmony drivers.
OSAL_THREAD_PriorityGet Gets the priority of a thread.
OSAL_THREAD_PrioritySet Sets the priority of a thread.
OSAL_THREAD_Resume Resumes a specified thread.
OSAL_THREAD_ResumeAll Resumes all suspended threads.
OSAL_THREAD_Sleep Puts the currently executing thread to sleep.
OSAL_THREAD_Suspend Suspends a specified thread.
OSAL_THREAD_SuspendAll Suspends all threads apart from the calling thread.
Description
This section describes the APIs of the OSAL Library. Refer to each section for a description.
5.5.7.1 Thread Functions
5.5.7.1.1 OSAL_THREAD_FUNCTION Type
C
typedef void (* OSAL_THREAD_FUNCTION)(void* pData);
Description
OSAL thread function template
OSAL thread functions must match this type or use it explicitly. Thread functions are expected to return nothing. The pData
parameter is information passed at creation time and is implementation specific.
Remarks
None.
5.5.7.1.2 OSAL_THREAD_Create Function
C
OSAL_RESULT OSAL_THREAD_Create(
OSAL_THREAD_FUNCTION task,
const char* name,
uint16_t stack_size,
uint8_t priority,
void* pData,
OSAL_THREAD_HANDLE_TYPE* pHandle
);
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Description
This function creates an OSAL thread. The thread function is implemented as a simple task that will normally not return (i.e., a
while(1) loop). The name is not used by the OSAL, but may be used by the RTOS for diagnostic and reporting purposes. The
thread is created with a fixed stack size that is allocated from one of the available memory pools or more normally from the heap.
The priority of the thread is an 8-bit quantity with higher values denoting threads of a higher priority. Optionally, a parameter may
be passed to the thread function that can be used to implement per instance behavior. For example, one LED flashing task could
be created several times with the LED number passed as a parameter at creation time. A handle to the created thread is
returned in pHandle. Threads may be created prior to the RTOS starting, however, no execution will occur until it is started. A
created thread is immediately placed into the READY state and is able to run provided that it is the highest priority thread when
all threads are evaluated by the kernel, either during normal operation, or at RTOS start-up time.
Preconditions
Thread function must exist in program memory.
Parameters
Parameters Description
task Name of the function that implements the thread code
name Textual name of the thread. Not used by the OSAL but may be used by the RTOS
for diagnostic and tracing purposes.
stack_size Size of the stack associated with a thread in bytes. The RTOS will allocate this
many bytes from any underlying memory pool or the heap.
priority Priority of the thread from 1-255. Higher values indicate threads with higher
priorities. It is left down to the underlying RTOS whether threads of the same
priority are permitted or if threads should be given a unique priority.
pData Pointer to data passed to the thread. Optionally, NULL may be passed.
pHandle Pointer to a variable that can contain the created threads handle
Returns
OSAL_RESULT_TRUE - Thread successfully created
OSAL_RESULT_FALSE - Thread not created or insufficient memory available
Remarks
None.
Example
// create a thread passing a data structure as a parameter during creation
OSAL_THREAD_Create(threadCheck, "CHECK", 500, OTH_APP_THREAD_PRIORITY + 2, (void*) &appData,
NULL);
5.5.7.1.3 OSAL_THREAD_CreateDaemon Function
C
OSAL_RESULT OSAL_THREAD_CreateDaemon(
OSAL_THREAD_FUNCTION task
);
Description
This function will create a daemon or system thread designed to assist Harmony driver modules with their operation. Some
Harmony drivers will incorporate state machines or other loop strucutres that must be periodically called for the driver to continue
operating. For instance, a USART driver may have a state machine that manages the prioritization and transmission of data from
multiple clients. This could work in addition to any processing that occurs when operating under interrupts so it will have a
separate DRV_xxxx_Tasks routine (or similar) that must be periodically called. Since the prioritization and frequency of these
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calls is only known to the programmer when designing the end application, the OSAL provides a lightweight thread mechanism
that is primarily intended to be used internally by MPLAB Harmony. The Daemon threads have a fixed size stack (defined in
system_config.h) and operate at a fixed priority.
Preconditions
Daemon function must exist in program memory.
Parameters
Parameters Description
task The name of the function that implements the Daemon
Returns
OSAL_RESULT_TRUE - Thread successfully created
OSAL_RESULT_FALSE - Thread not created or insufficient memory available
Remarks
None.
Example
// inside driver initialization routine
...
OSAL_THREAD_CreateDaemon(DRV_USART_Tasks);
5.5.7.1.4 OSAL_THREAD_PriorityGet Function
C
uint8_t OSAL_THREAD_PriorityGet(
OSAL_THREAD_HANDLE_TYPE handle
);
Description
This function gets the priority of a thread. The priority of the thread with the specified handle is returned. A handle value of NULL
returns the priority of the thread making the call.
Preconditions
Thread must have been created.
Parameters
Parameters Description
handle The thread handle. NULL indicates use the current thread.
Returns
0-255 - The current priority of the thread. Higher values indicate higher priority.
Remarks
None.
Example
// raise the priority of this thread to ensure it completes a complex
// operation
uint8_t currPriority;
currPriority = OSAL_THREAD_PriorityGet(NULL);
OSAL_THREAD_PrioritySet(NULL, currPriority + 1);
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... perform a time critical operation
// restore the priority
OSAL_THREAD_PrioritySet(NULL, currPriority);
5.5.7.1.5 OSAL_THREAD_PrioritySet Function
C
OSAL_RESULT OSAL_THREAD_PrioritySet(
OSAL_THREAD_HANDLE_TYPE handle,
uint8_t priority
);
Description
This function sets the priority of a thread. The priority of the thread with the specified handle is changed to the new value. If as a
result of the change, it now has the highest priority and if not blocked, will start executing.
Preconditions
Thread must have been created.
Parameters
Parameters Description
handle The thread handle. NULL indicates change the priority of the thread in which the
call was made.
priority Priority to be assigned to the thread
Returns
OSAL_RESULT_TRUE - Priority changed
OSAL_RESULT_FALSE - Priority not changed
Remarks
None.
Example
// raise the priority of this thread to ensure it completes a complex
// operation
uint8_t currPriority;
currPriority = OSAL_THREAD_GetPriority(NULL);
OSAL_THREAD_PrioritySet(NULL, currPriority + 1);
... perform a time critical operation
// restore the priority
OSAL_THREAD_PrioritySet(NULL, currPriority);
5.5.7.1.6 OSAL_THREAD_Resume Function
C
OSAL_RESULT OSAL_THREAD_Resume(
OSAL_THREAD_HANDLE_TYPE handle
);
Description
This functino resumes a specific thread.
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Preconditions
Thread must have been created.
Parameters
Parameters Description
handle The thread handle
Returns
OSAL_RESULT_TRUE - Thread resumed
OSAL_RESULT_FALSE - Thread could not be resumed
Remarks
None.
Example
// suspend a thread until a later time
OSAL_THREAD_Suspend(thread1Handle);
...
// resume the suspended thread
OSAL_THREAD_RESUME(thread1Handle);
5.5.7.1.7 OSAL_THREAD_ResumeAll Function
C
OSAL_RESULT OSAL_THREAD_ResumeAll();
Description
This function resumes all suspended threads. Execution will continue with the highest priority thread that is ready to execute.
Preconditions
Thread must have been created.
Returns
OSAL_RESULT_TRUE - Successful call
Remarks
None.
Example
// resume all threads
OSAL_THREAD_ResumeAll();
5.5.7.1.8 OSAL_THREAD_Sleep Function
C
OSAL_RESULT OSAL_THREAD_Sleep(
uint16_t waitMS
);
Description
This function puts the currently executing thread to sleep. Execution of the current thread is placed into a blocked state for the
specified amount of time. The exact amount of time that the thread will sleep will depend upon the granularity of the underlying
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pre-emptive tick.
Preconditions
Thread must have been created.
Parameters
Parameters Description
waitMS Number of milliseconds the thread will be blocked
Returns
OSAL_RESULT_TRUE - Call succeeded
Remarks
None.
Example
while (1)
{
// sleep for 500ms
OSAL_THREAD_Sleep(500);
// toggle an LED
DRV_IO_Toggle(drvHandle, LED_ID);
}
5.5.7.1.9 OSAL_THREAD_Suspend Function
C
OSAL_RESULT OSAL_THREAD_Suspend(
OSAL_THREAD_HANDLE_TYPE handle
);
Description
This function suspends a specific thread. If NULL is passed, the RTOS will attempt to suspend the thread in which the call was
made. The thread will then only resume when unsuspended by another part of the program with an appropriate resume call.
Preconditions
Thread must have been created.
Parameters
Parameters Description
handle The thread handle. NULL may be passed indicating suspend the calling thread.
Returns
OSAL_RESULT_TRUE - Thread suspended
OSAL_RESULT_FALSE - Thread could not be suspended
Remarks
None.
Example
// suspend this thread
OSAL_THREAD_Suspend(NULL);
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5.5.7.1.10 OSAL_THREAD_SuspendAll Function
C
OSAL_RESULT OSAL_THREAD_SuspendAll();
Description
This function suspends all threads. Interrupts are still enabled. The calling thread will continue executing at the next instruction.
Preconditions
Thread must have been created.
Returns
OSAL_RESULT_TRUE - Threads suspended
OSAL_RESULT_FALSE - Threads could not be suspended
Remarks
None.
Example
// suspend all threads
OSAL_THREAD_SuspendAll();
// perform critical code sequence
// NB a critical section may be a better choice here
...
5.5.7.2 Semaphore Functions
5.5.7.2.1 OSAL_SEM_Create Function
C
OSAL_RESULT OSAL_SEM_Create(
OSAL_SEM_HANDLE_TYPE* semID,
OSAL_SEM_TYPE type,
uint8_t maxCount,
uint8_t initialCount
);
Description
This function creates an OSAL binary or counting semaphore. If OSAL_SEM_TYPE_BINARY is specified, the maxcount and
initialCount values are ignored; otherwise, these must contain valid values.
Preconditions
Semaphore must have been declared.
Parameters
Parameters Description
semID Pointer to the Semaphore ID
type OSAL_SEM_TYPE_BINARY, create a binary semaphore
OSAL_SEM_TYPE_COUNTING, create a counting semaphore with the specified
count values
maxCount Maximum value for a counting semaphore (ignored for a BINARY semaphore)
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initialCount Starting count value for the semaphore (ignored for a BINARY semaphore)
Returns
OSAL_RESULT_TRUE - Semaphore created
OSAL_RESULT_FALSE - Semaphore creation failed
semID - Updated with valid semaphore handle if call was successful
Remarks
None.
Example
OSAL_SEM_Create(&mySemID, OSAL_SEM_TYPE_COUNTING, 10, 5);
5.5.7.2.2 OSAL_SEM_Delete Function
C
OSAL_RESULT OSAL_SEM_Delete(
OSAL_SEM_HANDLE_TYPE* semID
);
Description
This function deletes an OSAL semaphore, freeing up any allocated storage associated with it.
Preconditions
Semaphore must have been created.
Parameters
Parameters Description
semID Pointer to the semID
Returns
OSAL_RESULT_TRUE - Semaphore deleted
OSAL_RESULT_FALSE - Semaphore deletion failed
Remarks
None.
Example
OSAL_SEM_Delete(&mySemID);
5.5.7.2.3 OSAL_SEM_GetCount Function
C
uint8_t OSAL_SEM_GetCount(
OSAL_SEM_HANDLE_TYPE semID
);
Description
This function returns the current value of a counting semaphore. The value returned is assumed to be a single value ranging
from 0-255.
Preconditions
Semaphore must have been created.
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Parameters
Parameters Description
semID The semID
Returns
0 - Semaphore is unavailable
1-255 - Current value of the counting semaphore
Remarks
None.
Example
uint8_t semCount;
semCount = OSAL_SEM_GetCount(semUART);
if (semCount > 0)
{
// obtain the semaphore
if (OSAL_SEM_Pend(semUART) == OSAL_RESULT_TRUE)
{
// perform processing on the comm channel
...
}
}
else
{
// no comm channels available
...
}
5.5.7.2.4 OSAL_SEM_Pend Function
C
OSAL_RESULT OSAL_SEM_Pend(
OSAL_SEM_HANDLE_TYPE semID,
uint16_t waitMS
);
Description
This function is a blocking function call that waits (i.e., pends) on a semaphore. The function will return true is the semaphore
has been obtained, or false if it was not available or the time limit was exceeded.
Preconditions
Semaphore must have been created.
Parameters
Parameters Description
semID The semID
waitMS Time limit to wait in milliseconds.
0, do not wait
OSAL_WAIT_FOREVER, return only when semaphore is obtained
Other values, timeout delay
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Returns
OSAL_RESULT_TRUE - Semaphore obtained
OSAL_RESULT_FALSE - Semaphore not obtained or timeout occurred
Remarks
None.
Example
if (OSAL_SEM_Pend(semUARTRX, 50) == OSAL_RESULT_TRUE)
{
// character available
c = DRV_USART_ReadByte(drvID);
...
}
else
{
// character not available, resend prompt
...
}
5.5.7.2.5 OSAL_SEM_Post Function
C
OSAL_RESULT OSAL_SEM_Post(
OSAL_SEM_HANDLE_TYPE semID
);
Description
This function posts a binary semaphore or increments a counting semaphore. The highest priority task currently blocked on the
semaphore will be released and made ready to run.
Preconditions
Semaphore must have been created.
Parameters
Parameters Description
semID The semID
Returns
OSAL_RESULT_TRUE - Semaphore posted
OSAL_RESULT_FALSE - Semaphore not posted
Remarks
None.
Example
OSAL_SEM_Post(semSignal);
5.5.7.2.6 OSAL_SEM_PostISR Function
C
OSAL_RESULT OSAL_SEM_PostISR(
OSAL_SEM_HANDLE_TYPE semID
);
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Description
This function posts a binary semaphore or increments a counting semaphore. The highest priority task currently blocked on the
semaphore will be released and made ready to run. This form of the post function should be used inside an ISR.
Preconditions
Semaphore must have been created.
Parameters
Parameters Description
semID The semID
Returns
OSAL_RESULT_TRUE - Semaphore posted
OSAL_RESULT_FALSE - Semaphore not posted
Remarks
This version of the OSAL_SEM_Post function should be used if the program is, or may be, operating inside an ISR. The OSAL
will take the necessary steps to ensure correct operation possibly disabling interrupts or entering a critical section. The exact
requirements will depend upon the particular RTOS being used.
Example
void __ISR(UART_2_VECTOR) _UART2RXHandler()
{
char c;
// indicate to the OSAL that this is an interrupt function
OSAL_ISR_Enter();
// read the character
c = U2RXREG;
// clear the interrupt flag
IFS1bits.U2IF = 0;
// post a semaphore indicating a character has been received
OSAL_SEM_PostISR(semSignal);
// indicate to the OSAL the ISR is ending
OSAL_ISR_Exit();
}
5.5.7.2.7 OSAL_SEM_DECLARE Macro
C
#define OSAL_SEM_DECLARE(semID) OSAL_SEM_HANDLE_TYPE semID
Description
OSAL_SEM_Declare(semID)
This function declares a data item of type OSAL_SEM_HANDLE_TYPE.
Remarks
None.
5.5.7.3 Mutex Functions
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5.5.7.3.1 OSAL_MUTEX_Create Function
C
OSAL_RESULT OSAL_MUTEX_Create(
OSAL_MUTEX_HANDLE_TYPE* mutexID
);
Description
This function creates a mutex, allocating storage if required and placing the mutex handle into the passed parameter.
Preconditions
Mutex must have been declared.
Parameters
Parameters Description
mutexID Pointer to the mutex handle
Returns
OSAL_RESULT_TRUE - Mutex successfully created
OSAL_RESULT_FALSE - Mutex failed to be created
Remarks
None.
Example
OSAL_MUTEX_HANDLE_TYPE mutexData;
OSAL_MUTEX_Create(&mutexData);
...
if (OSAL_MUTEX_Lock(mutexData, 1000) == OSAL_RESULT_TRUE)
{
// manipulate the shared data
...
}
5.5.7.3.2 OSAL_MUTEX_Delete Function
C
OSAL_RESULT OSAL_MUTEX_Delete(
OSAL_MUTEX_HANDLE_TYPE* mutexID
);
Description
This function deletes a mutex and frees associated storage if required.
Preconditions
None.
Parameters
Parameters Description
mutexID Pointer to the mutex handle
Returns
OSAL_RESULT_TRUE - Mutex successfully deleted
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OSAL_RESULT_FALSE - Mutex failed to be deleted
Remarks
None.
Example
OSAL_MUTEX_Delete(&mutexData);
5.5.7.3.3 OSAL_MUTEX_Lock Function
C
OSAL_RESULT OSAL_MUTEX_Lock(
OSAL_MUTEX_HANDLE_TYPE mutexID,
uint16_t waitMS
);
Description
This function locks a mutex, waiting for the specified timeout. If it cannot be obtained or the timeout period elapses 'false' is
returned.
Preconditions
Mutex must have been created.
Parameters
Parameters Description
mutexID The mutex handle
waitMS Timeout value in milliseconds
0, do not wait return immediately
OSAL_WAIT_FOREVER, wait until mutex is obtained before returning
Other values, Timeout delay
Returns
OSAL_RESULT_TRUE - Mutex successfully obtained
OSAL_RESULT_FALSE - Mutex failed to be obtained or timeout occurred
Remarks
None.
Example
OSAL_MUTEX_HANDLE_TYPE mutexData;
OSAL_MUTEX_Create(&mutexData);
...
if (OSAL_MUTEX_Lock(mutexData, 1000) == OSAL_RESULT_TRUE)
{
// manipulate the shared data
...
// unlock the mutex
OSAL_MUTEX_Unlock(mutexData);
}
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5.5.7.3.4 OSAL_MUTEX_Unlock Function
C
OSAL_RESULT OSAL_MUTEX_Unlock(
OSAL_MUTEX_HANDLE_TYPE mutexID
);
Description
This function unlocks a previously obtained mutex.
Preconditions
Mutex must have been created.
Parameters
Parameters Description
mutexID The mutex handle
Returns
OSAL_RESULT_TRUE - Mutex released
OSAL_RESULT_FALSE - Mutex failed to be released or error occurred
Remarks
None.
Example
OSAL_MUTEX_HANDLE_TYPE mutexData;
OSAL_MUTEX_Create(&mutexData);
...
if (OSAL_MUTEX_Lock(mutexData, 1000) == OSAL_RESULT_TRUE)
{
// manipulate the shared data
...
// unlock the mutex
OSAL_MUTEX_Unlock(mutexData);
}
5.5.7.3.5 OSAL_MUTEX_DECLARE Macro
C
#define OSAL_MUTEX_DECLARE(mutexID) OSAL_MUTEX_HANDLE_TYPE mutexID
Description
OSAL_MUTEX_Declare(mutexID)
This function declares a data item of type OSAL_MUTEX_HANDLE_TYPE
Remarks
None
5.5.7.4 Queue Functions
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5.5.7.4.1 OSAL_QUEUE_DECLARE Macro
C
#define OSAL_QUEUE_DECLARE(queueID) OSAL_QUEUE_HANDLE_TYPE queueID
Description
OSAL_QUEUE_Declare(queueID)
This function declares a data item of type OSAL_QUEUE_HANDLE_TYPE.
Remarks
None
5.5.7.4.2 OSAL_QUEUE_Add Function
C
OSAL_RESULT OSAL_QUEUE_Add(
OSAL_QUEUE_HANDLE_TYPE queueID,
uint8_t* pdata,
uint16_t waitMS
);
Description
This function adds the specified item to the queue by copying it. If the queue has space, the function will return immediately. If
there is no space on the queue, the function will wait up to the specified time before returning. The item is added to the tail of the
queue.
Preconditions
Queue must have been created.
Parameters
Parameters Description
queueID The OSAL_QUEUE handle
pdata Pointer to the data to be copied to the queue. The data item must be the same
size as that specified when creating the queue.
waitMS Time to wait while trying to write to a full queue before timing out
Returns
OSAL_RESULT_TRUE - Item successfully added to the queue
OSAL_RESULT_FALSE - Item could not be written to the queue or a timeout occurred
Remarks
None.
Example
// create a queue containing 16 byte items, queue is 5 items long.
OSAL_QUEUE_Create(&msgQueue, 16, 5);
...
// define a message (Note 0 at end is allowed for)
const char msg[16] = "Hello World....";
// write data to the queue. Wait until space is available
// Note in this case that the 0 at the end of msg is also copied
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OSAL_QUEUE_Add(msgQueue, (uint8_t*) msg, OSAL_WAIT_FOREVER);
5.5.7.4.3 OSAL_QUEUE_AddHead Function
C
OSAL_RESULT OSAL_QUEUE_AddHead(
OSAL_QUEUE_HANDLE_TYPE queueID,
uint8_t* pdata,
uint16_t waitMS
);
Description
This function adds the specified item to the front of the queue by copying it. If the queue has space the function will return
immediately. If there is no space on the queue then wait up to the specified time before returning. The item is added to the front
of the queue.
Preconditions
Queue must have been created.
Parameters
Parameters Description
queueID The OSAL_QUEUE handle
pdata Pointer to the data to be copied to the queue. The data item must be the same
size as that specified when creating the queue.
waitMS Time to wait while trying to write to a full queue before timing out
Returns
OSAL_RESULT_TRUE - Item successfully added to the queue
OSAL_RESULT_FALSE - Item could not be written to the queue or a timeout occurred
OSAL_RESULT_NOT_IMPLEMENTED - Function not implemented in the current RTOS
Remarks
None.
Example
// create a queue containing byte items, queue is 5 items long.
OSAL_QUEUE_Create(&msgQueue, sizeof(uint8_t), 5);
...
// Send an important message
uint8_t sigMsg = 42;
// write data to the front of the queue.
OSAL_QUEUE_AddHead(msgQueue, &sigMsg, OSAL_WAIT_FOREVER);
5.5.7.4.4 OSAL_QUEUE_AddHeadISR Function
C
OSAL_RESULT OSAL_QUEUE_AddHeadISR(
OSAL_QUEUE_HANDLE_TYPE queueID,
uint8_t* pdata
);
Description
This function adds the specified item to the queue by copying it. The item is added to the front of the queue. This version of Add
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should be used within an ISR.
Preconditions
Queue must have been created.
Parameters
Parameters Description
queueID The OSAL_QUEUE handle
pdata Pointer to the data to be copied to the queue. The data item must be the same
size as that specified when creating the queue.
Returns
OSAL_RESULT_TRUE - Item successfully added to the queue
OSAL_RESULT_FALSE - Item could not be written to the queue
OSAL_RESULT_NOT_IMPLEMENTED - Function not implemented in the current RTOS
Remarks
None.
Example
void __ISR(EXTERNAL_VECTOR) _ExternalIRQHandler()
{
const uint8_t msg = EMERGENCY_STOP;
OSAL_ISR_Enter();
// clear the interrupt flag
IFS1bit.EIF = 0;
// send an emergency message to any listening task
OSAL_QUEUE_AddHeadISR(myRXQueue, msg);
OSAL_ISR_Exit();
}
5.5.7.4.5 OSAL_QUEUE_AddISR Function
C
OSAL_RESULT OSAL_QUEUE_AddISR(
OSAL_QUEUE_HANDLE_TYPE queueID,
uint8_t* pdata
);
Description
This function adds the specified item to the queue by copying it. The item is added to the tail of the queue. This version of Add
should be used within an ISR.
Preconditions
Queue must have been created.
Parameters
Parameters Description
queueID The OSAL_QUEUE handle
pdata Pointer to the data to be copied to the queue. The data item must be the same
size as that specified when creating the queue.
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Returns
OSAL_RESULT_TRUE - Item successfully to the queue
OSAL_RESULT_FALSE - Item could not be added to the queue
Remarks
None.
Example
void __ISR(UART_2_VECTOR) _UART2RXHandler()
{
char c;
OSAL_ISR_Enter();
// read the character
c = U2RXREG;
// clear the interrupt flag
IFS1bits.U2IF = 0;
// post the received character onto a queue for later processing
OSAL_QUEUE_AddISR(myRXQueue, c);
OSAL_ISR_Exit();
}
5.5.7.4.6 OSAL_QUEUE_Create Function
C
OSAL_RESULT OSAL_QUEUE_Create(
OSAL_QUEUE_HANDLE_TYPE* queueID,
uint16_t width,
uint16_t depth
);
Description
This function allocates storage and creates an OSAL queue entity. Each entry in the queue will be 'width' bytes in size and the
queue can contain at most 'depth' items.
Preconditions
Queue must have been declared.
Parameters
Parameters Description
queueID Pointer to the OSAL queue
width Width in bytes of each item in the queue
depth Maximum number of entries that can be stored in the queue
Returns
OSAL_RESULT_TRUE - Queue created
OSAL_RESULT_FALSE - Queue failed to be created
Remarks
The function creates an OSAL_QUEUE with the specified parameters. OSAL_QUEUEs are assumed to work on copy with
passed data being copied into the queue or other temporary storage so that the passed data storage is released.
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Example
// declare a queue variable
OSAL_QUEUE_Declare(serialQueue);
// create a queue that contains 16bit integers and is 10 items long
OSAL_QUEUE_Create(&serialQueue, sizeof(uint16_t), 10);
5.5.7.4.7 OSAL_QUEUE_Delete Function
C
OSAL_RESULT OSAL_QUEUE_Delete(
OSAL_QUEUE_HANDLE_TYPE* queueID
);
Description
This function deletes an OSAL_QUEUE pointed to be the passed argument. Associated storage is released upon completion.
Preconditions
Queue must have been created.
Parameters
Parameters Description
queueID Pointer to the OSAL_QUEUE object handle
Returns
OSAL_RESULT_TRUE - Queue deleted
OSAL_RESULT_FALSE - Queue failed to be deleted
Remarks
None.
Example
// declare a queue variable
OSAL_QUEUE_Declare(serialQueue);
// create a queue that contains 16bit integers and is 10 items long
OSAL_QUEUE_Create(&serialQueue, sizeof(uint16_t), 10);
// application is terminating, delete queue object
OSAL_QUEUE_Delete(&serialQueue);
5.5.7.4.8 OSAL_QUEUE_Peek Function
C
OSAL_RESULT OSAL_QUEUE_Peek(
OSAL_QUEUE_HANDLE_TYPE queueID,
uint8_t* pdata,
uint16_t waitMS
);
Description
This function examines the queue and copy the item at the head leaving the item on the queue for the next access. If there is
nothing on the queue, block until waitMS milliseconds have elapsed before returning, or until something is placed on the queue.
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Preconditions
Queue must have been created.
Parameters
Parameters Description
queueID The OSAL_QUEUE handle
pdata Pointer to the location to receive data copied from the queue. The data item must
be the same size as that specified when creating the queue.
waitMS Maximum time to wait before returning if the queue is empty
0, return immediately
OSAL_WAIT_FOREVER, wait until data is in the queue
Others, maximum blocking time in milliseconds
Returns
OSAL_RESULT_TRUE - Item successfully copied from the queue
OSAL_RESULT_FALSE - Nothing copied from the queue or timeout occurred
OSAL_RESULT_NOT_IMPLEMENTED - Operation not available on the current RTOS
Remarks
None.
Example
// copy filenames from a queue and process the data in the file
// however if another filename is on the queue then abort and
// restart the operation
OSAL_QUEUE_Remove(rxQueue, fileName, OSAL_WAITFOREVER);
while (abort == false)
{
// read data from the file and process it
...
// check for a new filename to process
if (OSAL_QUEUE_Peek(rxQueue, fileName, 0) == OSAL_RESULT_TRUE)
{
abort = true;
}
}
5.5.7.4.9 OSAL_QUEUE_PeekISR Function
C
OSAL_RESULT OSAL_QUEUE_PeekISR(
OSAL_QUEUE_HANDLE_TYPE queueID,
uint8_t* pdata
);
Description
This function examines the queue and copies the item at the head, leaving the item on the queue for the next access. This
version should be called from inside an ISR.
Preconditions
Queue must have been created.
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Parameters
Parameters Description
queueID The OSAL_QUEUE handle
pdata Pointer to the location to receive data copied from the queue. The data item must
be the same size as that specified when creating the queue.
Returns
OSAL_RESULT_TRUE - Item successfully copied from the queue
OSAL_RESULT_FALSE - Nothing copied from the queue
OSAL_RESULT_NOT_IMPLEMENTED - Operation not available on the current RTOS
Remarks
None.
Example
uint16_t data;
OSAL_QUEUE_PeekISR(myQueue, &data);
5.5.7.4.10 OSAL_QUEUE_Remove Function
C
OSAL_RESULT OSAL_QUEUE_Remove(
OSAL_QUEUE_HANDLE_TYPE queueID,
uint8_t* pdata,
uint16_t waitMS
);
Description
This function removes the item at the head of the queue. The item is copied to the location pointed to by pdata. The user should
ensure that there is sufficient space to receive the copied data. If no data is available, the function will block for waitMS before
returning.
Preconditions
Queue must have been created.
Parameters
Parameters Description
queueID The OSAL_QUEUE handle
pdata Pointer to the location to receive data copied from the queue. The data item must
be the same size as that specified when creating the queue.
waitMS Maximum time to wait before returning if the queue is empty
0, return immediately
OSAL_WAIT_FOREVER, wait until data is in the queue
Others, maximum blocking time in milliseconds
Returns
OSAL_RESULT_TRUE - Item successfully removed from the queue
OSAL_RESULT_FALSE - Nothing removed from the queue or timeout occurred
Remarks
None.
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Example
char rxChar;
// wait up to one second to process the next character
if (OSAL_QUEUE_Remove(rxQueue, &rxChar, 1000) == OSAL_RESULT_TRUE)
{
// process the data
...
}
else
{
// nothing received in the last one second so perform other processing
...
}
5.5.7.4.11 OSAL_QUEUE_RemoveISR Function
C
OSAL_RESULT OSAL_QUEUE_RemoveISR(
OSAL_QUEUE_HANDLE_TYPE queueID,
uint8_t* pdata
);
Description
This function removes the item at the head of the queue. Item is copied to the location pointed to by pdata. The user should
ensure that there is sufficient space to receive the copied data. This version of the queue remove function should be used inside
an ISR.
Preconditions
Queue must have been created.
Parameters
Parameters Description
queueID The OSAL_QUEUE handle
pdata Pointer to the location to receive data copied from the queue. The data item must
be the same size as that specified when creating the queue.
Returns
OSAL_RESULT_TRUE - Item successfully removed from the queue
OSAL_RESULT_FALSE - Nothing removed from the queue
Remarks
None.
Example
char rxChar;
void __ISR(TIMER_1_VECTOR) _ET1IRQHandler()
{
const uint8_t msg;
OSAL_ISR_Enter();
// clear the interrupt flag
IFS0bits.T1IF = 0;
// check for data to be sent from a queue
if (OSAL_QUEUE_RemoveISR(myTXQueue, msg) == OSAL_RESULT_TRUE)
{
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DRV_USART_WriteByte(uart_drv, msg);
}
OSAL_ISR_Exit();
}
5.5.7.5 Critical Section Functions
5.5.7.5.1 OSAL_CRIT_Enter Function
C
void OSAL_CRIT_Enter(
OSAL_CRIT_TYPE severity
);
Description
Critical Section group
***************************************************************************
This function enters a critical section of code. It is assumed that the sequence of operations bounded by the enter and leave
critical section operations is treated as one atomic sequence that will not be disturbed.
Preconditions
None.
Parameters
Parameters Description
severity OSAL_CRIT_TYPE_LOW, The RTOS should disable all other running tasks
effectively locking the scheduling mechanism.
OSAL_CRIT_TYPE_HIGH, The RTOS should disable all possible interrupts
sources including the scheduler ensuring that the sequence of code operates
without interruption.
Returns
None.
Remarks
The sequence of operations bounded by the OSAL_CRIT_Enter and OSAL_CRIT_Leave form a critical section. The severity
level defines whether the RTOS should perform task locking or completely disable all interrupts.
Example
// prevent other tasks pre-empting this sequence of code
OSAL_CRIT_Enter(OSAL_CRIT_TYPE_LOW);
// modify the peripheral
DRV_USART_Reinitialize( objUSART, &initData);
OSAL_CRIT_Leave(OSAL_CRIT_TYPE_LOW);
5.5.7.5.2 OSAL_CRIT_Leave Function
C
void OSAL_CRIT_Leave(
OSAL_CRIT_TYPE severity
);
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Description
This function leaves a critical section of code. It is assumed that the sequence of operations bounded by the enter and leave
critical section operations is treated as one atomic sequence that will not be disturbed. The severity should match the severity
level used in the corresponding OSAL_CRIT_Enter call to ensure that the RTOS carries out the correct action.
Preconditions
None.
Parameters
Parameters Description
severity OSAL_CRIT_TYPE_LOW, The RTOS should disable all other running tasks
effectively locking the scheduling mechanism.
OSAL_CRIT_TYPE_HIGH, The RTOS should disable all possible interrupts
sources including the scheduler ensuring that the sequence of code operates
without interruption.
Returns
None.
Remarks
The sequence of operations bounded by the OSAL_CRIT_Enter and OSAL_CRIT_Leave form a critical section. The severity
level defines whether the RTOS should perform task locking or completely disable all interrupts.
Example
// prevent other tasks pre-empting this sequence of code
OSAL_CRIT_Enter(OSAL_CRIT_TYPE_LOW);
// modify the peripheral
DRV_USART_Reinitialize( objUSART, &initData);
OSAL_CRIT_Leave(OSAL_CRIT_TYPE_LOW);
5.5.7.5.3 OSAL_CRIT_TYPE Enumeration
C
enum OSAL_CRIT_TYPE {
OSAL_CRIT_TYPE_LOW,
OSAL_CRIT_TYPE_HIGH
};
Description
OSAL Critical Type
This enum represents possible critical section types.
OSAL_CRIT_TYPE_LOW - Low priority critical section, can be formed by locking the scheduler (if supported by RTOS)
OSAL_CRIT_TYPE_HIGH - High priority critical section, will be formed by disabling all interrupts.
Remarks
Critical section types
5.5.7.6 Interrupt Handling Functions
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5.5.7.6.1 OSAL_ISR_Enter Function
C
void OSAL_ISR_Enter();
Description
This function allows the OSAL and RTOS to implement any set up required should an OSAL function be called during the
interrupt handler. Depending on the underlying RTOS, it may be necessary to set a global flag indicating that an interrupt is
currently being executed for the correct context code to be executed during calls to the kernel. OSAL_ISR_Enter allows the
RTOS to implement the required functions.
Preconditions
None, (in an interrupt handler).
Returns
None.
Remarks
None.
Example
void __ISR(UART_2_VECTOR) _UART2RXHandler()
{
char c;
OSAL_ISR_Enter();
// perform interrupt processing and clear the flag
...
OSAL_ISR_Exit();
}
5.5.7.6.2 OSAL_ISR_Exit Function
C
void OSAL_ISR_Exit();
Description
This function allows the OSAL and RTOS to implement any restoration required after an ISR has completed. Depending on the
underlying RTOS, it may be necessary to set a global flag indicating that an interrupt is currently being executed for the correct
context code to be executed during calls to the kernel. OSAL_ISR_Exit allows the RTOS to implement the required functions.
Preconditions
None, (in an interrupt handler).
Returns
None.
Remarks
None.
Example
void __ISR(UART_2_VECTOR) _UART2RXHandler()
{
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char c;
OSAL_ISR_Enter();
// perform interrupt processing and clear the flag
...
OSAL_ISR_Exit();
}
5.5.7.7 Error Handling Functions
5.5.7.7.1 OSAL_ERROR_CALLBACK_TYPE Enumeration
C
enum OSAL_ERROR_CALLBACK_TYPE {
OSAL_ERROR_CALLBACK_DEFAULT = 0,
OSAL_ERROR_CALLBACK_OUT_OF_MEMORY,
OSAL_ERROR_CALLBACK_STACK_OVERFLOW,
OSAL_ERROR_CALLBACK_ERROR
};
Description
OSAL Error Callback Type
This enum represents possible OSAL error callback types.
OSAL_ERROR_CALLBACK_DEFAULT - Default error OSAL_ERROR_CALLBACK_OUT_OF_MEMORY - Out of memory
allocating resource such as creating a task or queue OSAL_ERROR_CALLBACK_STACK_OVERFLOW - Stack overflow
detected in a task OSAL_ERROR_CALLBACK_ERROR - Generic error message
Remarks
Error types are heavily RTOS specific so only basic types are indicated
5.5.7.7.2 OSAL_ErrorCallback Function
C
void OSAL_ErrorCallback(
OSAL_ERROR_CALLBACK_TYPE type
);
Description
The callback function will be executed whenever an error occurs within an underlying RTOS. The OSAL implements this function
as a weak type allowing it to be overridden by the user. The type and severity of errors that can be encountered by an RTOS will
vary according to the specific implementation so this only provides lightweight error handling. There is no expectation that the
function should return and if this does happen there is no guarantee that the RTOS will continue to function properly. A user
application could override this function and provide simple signalling of the error such as logging a message or flashing a light.
Preconditions
None.
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Parameters
Parameters Description
type Type of error
OSAL_ERROR_CALLBACK_DEFAULT, Default error
OSAL_ERROR_CALLBACK_OUT_OF_MEMORY, Memory allocation error
OSAL_ERROR_CALLBACK_STACK_OVERFLOW, Stack overflow in a thread
OSAL_ERROR_CALLBACK_ERROR, Generic error
Returns
None
Remarks
None.
Example
// application override of the callback
void OSAL_ErrorCallback(OSAL_ERROR_CALLBACK_TYPE type)
{
// turn on the fault light
LATAbits.LATA0 = 1;
// do not return
while (1)
{
}
}
5.5.7.8 Memory Allocation Functions
5.5.7.8.1 OSAL_Free Function
C
void OSAL_Free(
void* pData
);
Description
This function deallocates memory and returns it to the default pool. In an RTOS-based application, the memory may have been
allocated from multiple pools or simply from the heap. In non-RTOS applications, this function calls the C standard function free.
Preconditions
None.
Parameters
Parameters Description
pData Pointer to the memory block to be set free
Returns
None.
Remarks
None.
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Example
// create a working array
uint8_t* pData;
pData = OSAL_Malloc(32);
if (pData != NULL)
{
...
// deallocate the memory
OSAL_Free(pData);
// and prevent it accidentally being used again
pData = NULL;
}
5.5.7.8.2 OSAL_Malloc Function
C
void* OSAL_Malloc(
size_t size
);
Description
This function allocates a block of memory from the default allocator from the underlying RTOS. If no RTOS is present, it defaults
to malloc. Many operating systems incorporate their own memory allocation scheme, using pools, blocks or by wrapping the
standard C library functions in a critical section. Since an Harmony application may not know what target OS is being used (if
any), this function ensures that the correct thread safe memory allocator will be used.
Preconditions
None.
Parameters
Parameters Description
size Size of the requested memory block in bytes
Returns
Pointer to the block of allocated memory. NULL is returned if memory could not be allocated.
Remarks
None.
Example
// create a working array
uint8_t* pData;
pData = OSAL_Malloc(32);
if (pData != NULL)
{
...
}
5.5.7.9 OSAL Control Functions
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5.5.7.9.1 OSAL_Initialize Function
C
OSAL_RESULT OSAL_Initialize();
Description
This function performs OSAL initialization .This function should be called near the start of main in an application that will use an
underlying RTOS. This permits the RTOS to perform any one time initialization before the application attempts to create drivers
or other items that may use the RTOS. Typical actions performed by OSAL_Initialize would be to allocate and prepare any
memory pools for later use.
Preconditions
None.
Returns
OSAL_RESULT_TRUE - Initialization completed successfully.
Remarks
None.
Example
int main()
{
OSAL_Initialize();
App_Init();
OSAL_Start();
}
5.5.7.9.2 OSAL_Name Function
C
const char* OSAL_Name();
Description
This function returns a const char* to the textual name of the RTOS. The name is a NULL terminated string.
Preconditions
None.
Returns
const char* - Name of the underlying RTOS or NULL
Remarks
None.
Example
// get the RTOS name
const char* sName;
sName = OSAL_Name();
sprintf(buff, "RTOS: %s", sName);
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5.5.7.9.3 OSAL_Start Function
C
OSAL_RESULT OSAL_Start();
Description
This function starts the underlying RTOS application. The application will not normally return from this function call since the
RTOS and interrupts will be responsible for all program operation. A return from this function is usually fatal and indicates that
the program has failed in some way.
Preconditions
None.
Returns
OSAL_RESULT_FALSE - The OS terminated for some reason
Remarks
None.
Example
int main()
{
OSAL_Initialize();
App_Init();
OSAL_Start();
}
5.5.7.10 Data Types and Constants
5.5.7.10.1 OSAL_MUTEX_HANDLE_TYPE Macro
C
#define OSAL_MUTEX_HANDLE_TYPE uint8_t
Description
Handle to a mutex, this is the default implementation and may be overridden in an actual implementation file
5.5.7.10.2 OSAL_QUEUE_HANDLE_TYPE Macro
C
#define OSAL_QUEUE_HANDLE_TYPE uint8_t
Description
Handle to a queue, this is the default implementation and may be overridden in an actual implementation file
5.5.7.10.3 OSAL_SEM_HANDLE_TYPE Macro
C
#define OSAL_SEM_HANDLE_TYPE uint8_t
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Description
Handle to a semaphore, this is the default implementation and may be overridden in an actual implementation file
5.5.7.10.4 OSAL_THREAD_HANDLE_TYPE Macro
C
#define OSAL_THREAD_HANDLE_TYPE uintptr_t
Description
Handle to a thread, this is the default implementation and may be overridden in an actual implementation file
5.5.7.10.5 OSAL_USE_NONE Macro
C
#define OSAL_USE_NONE
Description
This is macro OSAL_USE_NONE.
5.5.7.10.6 OSAL_WAIT_FOREVER Macro
C
#define OSAL_WAIT_FOREVER (uint16_t) 0xFFFF
Description
Default value indicating block forever
5.5.7.10.7 OSAL_RESULT Enumeration
C
enum OSAL_RESULT {
OSAL_RESULT_NOT_IMPLEMENTED = -1,
OSAL_RESULT_FALSE = 0,
OSAL_RESULT_TRUE = 1
};
Description
OSAL Result type
This enum represents possible return types from OSAL functions.
Remarks
These enum values are the possible return values from OSAL functions where a standard success/fail type response is required.
The majority of OSAL functions will return this type with a few exceptions.
5.5.7.10.8 OSAL_SEM_TYPE Enumeration
C
enum OSAL_SEM_TYPE {
OSAL_SEM_TYPE_BINARY,
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OSAL_SEM_TYPE_COUNTING
};
Description
OSAL Semaphore Type
This enum represents possible semaphore types.
OSAL_SEM_TYPE_BINARY - Simple binary type that can be taken once
OSAL_SEM_TYPE_COUNTING - Complex type that can be taken set number of times defined at creation time
Remarks
Binary and counting semaphore type.
5.5.8 Files
Files
Name Description
osal.h Common interface definitions for the Operating System Abstraction Layer (OSAL).
Description
5.5.8.1 osal.h
Descriptive File Name: Operating System Abstraction Layer
This file defines the common interface to the Operating System Abstraction Layer. It defines the common types used by the
OSAL and defines the function prototypes. Depending upon the OSAL mode, a support level specific implementation file is
included by this file to give the required level of compatibility. The available support levels include, OSAL_USE_NONE,
OSAL_USE_BASIC, and OSAL_USE_RTOS.
Enumerations
Name Description
OSAL_CRIT_TYPE Enumerated type respresenting the possible types of critical section.
OSAL_ERROR_CALLBACK_TYPE Enumerated type respresenting the possible types of callback message.
OSAL_RESULT Enumerated type representing the general return value from OSAL functions.
OSAL_SEM_TYPE Enumerated type respresenting the possible types of semaphore.
Functions
Name Description
OSAL_CRIT_Enter Enters a critical section with the specified severity level.
OSAL_CRIT_Leave Leaves a critical section with the specified severity level.
OSAL_ErrorCallback Lightweight error handling callback function for the RTOS.
OSAL_Free Deallocates a block of memory and return to the default pool.
OSAL_Initialize Performs OSAL initialization.
OSAL_ISR_Enter Informs the OSAL and RTOS that an ISR is being entered.
OSAL_ISR_Exit Informs the OSAL and RTOS that an ISR is being exited.
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OSAL_Malloc Allocates memory using the OSAL default allocator.
OSAL_MUTEX_Create Creates a mutex.
OSAL_MUTEX_Delete Deletes a mutex.
OSAL_MUTEX_Lock Locks a mutex.
OSAL_MUTEX_Unlock Unlocks a mutex.
OSAL_Name Obtains the name of the underlying RTOS.
OSAL_QUEUE_Add Addd the specified item to the queue with a time-out if the queue is full.
OSAL_QUEUE_AddHead Adds the specified item to the front of the queue with a timeout if the queue is full.
OSAL_QUEUE_AddHeadISR Adds the specified item to the front of the queue from within an ISR.
OSAL_QUEUE_AddISR Adds the specified item to the queue from with an ISR.
OSAL_QUEUE_Create Creates a queue with the specified width and depth.
OSAL_QUEUE_Delete Deletes an OSAL_QUEUE.
OSAL_QUEUE_Peek Copys the item at the head of the queue but leave it on the queue. If the queue
is empty, it will block up to waitMS.
OSAL_QUEUE_PeekISR Copys the item at the head of the queue but leaves it on the queue.
OSAL_QUEUE_Remove Removes the item at the head of the queue. If the queue is empty it will block up
to waitMS.
OSAL_QUEUE_RemoveISR Removes the item at the head of the queue.
OSAL_SEM_Create Creates an OSAL Semaphore.
OSAL_SEM_Delete Deletes an OSAL Semaphore.
OSAL_SEM_GetCount Returns the current value of a counting semaphore.
OSAL_SEM_Pend Waits on a semaphore. Returns true if the semaphore was obtained within the
time limit.
OSAL_SEM_Post Posts a semaphore or increments a counting semaphore.
OSAL_SEM_PostISR Posts a semaphore or increments a counting semaphore from within an Interrupt
Service Routine (ISR).
OSAL_Start Starts the underlying RTOS
OSAL_THREAD_Create Creates an OSAL thread with the specified parameters.
OSAL_THREAD_CreateDaemon Creates a Daemon thread for use with multi-threaded Harmony drivers.
OSAL_THREAD_PriorityGet Gets the priority of a thread.
OSAL_THREAD_PrioritySet Sets the priority of a thread.
OSAL_THREAD_Resume Resumes a specified thread.
OSAL_THREAD_ResumeAll Resumes all suspended threads.
OSAL_THREAD_Sleep Puts the currently executing thread to sleep.
OSAL_THREAD_Suspend Suspends a specified thread.
OSAL_THREAD_SuspendAll Suspends all threads apart from the calling thread.
Macros
Name Description
OSAL_MUTEX_DECLARE Declares an OSAL mutex.
OSAL_MUTEX_HANDLE_TYPE Handle to a mutex, this is the default implementation and may be overridden in
an actual implementation file
OSAL_QUEUE_DECLARE Declares an OSAL queue.
OSAL_QUEUE_HANDLE_TYPE Handle to a queue, this is the default implementation and may be overridden in
an actual implementation file
OSAL_SEM_DECLARE Declares an OSAL semaphore.
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OSAL_SEM_HANDLE_TYPE Handle to a semaphore, this is the default implementation and may be
overridden in an actual implementation file
OSAL_THREAD_HANDLE_TYPE Handle to a thread, this is the default implementation and may be overridden in
an actual implementation file
OSAL_USE_NONE This is macro OSAL_USE_NONE.
OSAL_WAIT_FOREVER Default value indicating block forever
Types
Name Description
OSAL_THREAD_FUNCTION Functions that will operate as a separate thread under the OSAL should match
this type.
File Name
osal.h
Company
Microchip Technology Inc.
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5.6 Peripheral Library Help
This section provides descriptions of the MPLAB Harmony peripheral libraries.
Description
This section contains the list of peripheral libraries.
5.6.1 ADC Peripheral Library
This topic describes the Analog-to-Digital Converter peripheral library interface.
Description
This section contains the list of topics.
5.6.1.1 Introduction
ADC Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Analog-to-Digital Converter (ADC) module, which is available on the Microchip
family of microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module
without the necessity of interacting directly with the module's registers, thus hiding differences from one microcontroller variant to
another.
ADC Overview
An ADC is an analog peripheral that converts a continuous quantity to a discrete digital number. An ADC is a signal conversion
process that periodically samples and converts a continuously varying signal - analog level into digital values. An ADC might be
used to make an isolated measurement. ADCs are also used to quantize time-varying signals by turning them into a sequence of
digital samples. This results in the signal being quantized in both time and value. The resolution of a converter indicates the
number of discrete values it can produce over the range of analog values. This library currently supports 8-bit, 10-bit, and 12-bit
resolution.
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5.6.1.2 Release Notes
MPLAB Harmony Version: v0.70b ADC Peripheral Library Version: 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.1.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED AS IS MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.1.4 Using the Library
Using the Libary
This topic describes the basic architecture of the ADC Peripheral Library and provides information and examples on how to use it.
Interface Header File: plib_adc.h
The interface to the ADC library is defined in the "plib_adc.h" header file, which is included by the "peripheral.h" peripheral library
header file. Any C language source (.c) file that uses the ADC library must include "peripheral.h".
Library File:
The ADC peripheral library is part of the processor-specific peripheral library installed with the compiler. This library is
automatically available (in the default search path) for any project built using a Microchip compiler.
5.6.1.4.1 Hardware Abstraction Model
This library provides a low-level abstraction of the ADC module on Microchip microcontrollers with a convenient C language
interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
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Description
Hardware Abstraction Model
The ADC module accepts an analog signal at any one instance and converts it to a corresponding 8-bit, 10-bit, or 12-bit digital
value. It can accommodate a number of analog inputs and separate reference inputs; the actual number available on a particular
device depends on the package size.
Hardware Abstraction Block Diagram
A combination of input multiplexers can select the signal to be converted from multiple analog input pins. The entire multiplexer
path includes provision for differential analog input, although the number of negative input pins is limited, and the signal
difference must remain positive (i.e., unipolar).
Sampling Logic:
An internal Sample and Hold (S&H) circuit acquires a sample of an input signal, and then holds that value constant during the
conversion process. The purpose of the S&H circuitry is to take a snapshot of the sensor signal and hold the value. The sampled
voltage is held and converted to a digital value, which strictly speaking, represents the ratio of that input voltage to a reference
voltage. Configuration choices can allow connection of an external reference or use of the device power and ground (AVDD and
AVSS).
Conversion Logic:
The heart of the ADC is the conversion logic that converts the analog signal value into its equivalent discrete representation.
Conversions can be started individually by program control, continuously free-running, or triggered by selected hardware events.
A single channel may be repeatedly converted, alternate conversions may be performed on two channels, or any or all of the
channels may be sequentially scanned and converted according to a user-defined bit map.
Result Handling:
The resulting conversion output is a 8-bit, 10-bit, or 12-bit digital number that can be signed or unsigned, left- or right-justified in
a 16-bit word.
ADC Timing Details:
Sample time is the time that the ADC module’s S&H circuit is connected to the analog input pin. The sample time may be started
and ended automatically by the ADC’s hardware or under direct program control. There is a minimum sample time to ensure that
the S&H circuit will provide sufficient accuracy for the analog-to-digital conversion.
Conversion time is the time required for the ADC to convert the voltage held by the S&H circuit. The conversion trigger ends the
sampling time and begins an analog-to-digital conversion or a repeating sequence. The conversion trigger sources can be taken
from a variety of hardware sources or can be controlled directly in software.
Once the conversion is complete, the S&H circuit can be reconnected to the input pin and a CPU interrupt may be generated.
The sum of the sample time and the analog-to-digital conversion time provides the total ADC sequence time. The following figure
shows the basic conversion sequence and the relationship between intervals.
ADC Sample/Convert Sequence
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The conversion trigger sources can be taken from a variety of hardware sources, or can be controlled directly by software. One
of the conversion trigger options is an auto-conversion, which uses a counter and the ADC clock to set the time between
auto-conversions. The Auto-Sample mode and auto-conversion trigger can be used together to provide continuous automatic
conversions without software intervention.
A sample/convert sequence that uses multiple S&H channels can be simultaneously sampled or sequentially sampled.
Simultaneously sampling multiple signals ensures that the snapshot of the analog inputs occurs at precisely the same time for all
inputs. Sequential sampling takes a snapshot of each analog input just before conversion starts on that input. The sampling of
multiple inputs is not correlated.
Channel Multiplexers:
On some devices, S&H circuits have analog multiplexers on both their non-inverting and inverting inputs to select which analog
input(s) are sampled. The ADC of some devices incorporate two independent sets of input multiplexers (MUX A and MUX B),
which allow users to choose the analog channels that are to be sampled. Functionally, MUX A and MUX B are very similar to
each other. Both multiplexers allow any of the analog input channels to be selected for individual sampling and allow selection of
a negative reference source for differential signals. In addition, MUX A can be configured for sequential analog channel
scanning. By default the ADC only samples and converts the inputs selected by MUX A. There is also a possibility to alternate
between two sets of inputs selected by MUX A and MUX B during successive samples.
MUX Abstraction Model
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When using MUX A to select analog inputs, the ADC module has the ability to scan multiple analog channels sequentially.
Input Selection:
The ADC module provides a flexible mechanism to select analog inputs for conversion:
• Fixed input selection
• Alternate input selection
• Channel scanning
Fixed input selection:
This is achieved through one or more of the S&H channels available in the device. The S&H channels are connected to the
analog input pins through the analog multiplexer.
Alternate Sampling:
In an Alternate Input Selection mode, the ADC completes one sweep using the MUX A selection, and then another sweep using
the MUX B selection, and then another sweep using the MUX A selection, and so on.
Alternate Input Selection in 2-Channel Sequential Sampling Configuration
Channel Scanning:
On some devices, the ADC module supports the Channel Scan mode using S&H Channel 0 (CH0). The number of inputs
scanned is software selectable. Any subset of the analog inputs from AN0 to AN31 (depending on the number of analog inputs
present on a specific device) can be selected for conversion. The selected inputs are converted in ascending order. For
example, if the input selection includes AN4, AN1, and AN3, the conversion sequence is AN1, AN3, and AN4.
Scan Four Analog Inputs Using CH0
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Multi-Channel Sample Conversion:
Multi-channel analog-to-digital converters typically convert each input channel sequentially using an input multiplexer.
Simultaneously sampling multiple signals ensures that the snapshot of the analog inputs occurs at precisely the same time for all
inputs. Certain applications require simultaneous sampling, especially when phase information exists between different
channels. Sequential sampling takes a snapshot of each analog input just before conversion starts on that input. Certain ADC
modules supports simultaneous sampling using two S&H or four S&H channels to sample the inputs at the same instance, and
then perform the conversion for each channel sequentially.
Simultaneous and Sequential Sampling
Specifying Conversion Results Buffering for Devices with Direct Memory Access (DMA):
The ADC module contains a single-word, read-only, dual-port register, which stores the ADC conversion result. If more than one
conversion result needs to be buffered before triggering an interrupt, DMA data transfers can be used. If DMA is supported and
enabled, multiple conversion results can be automatically transferred from ADC internal buffer to a user-defined buffer in the
DMA RAM area. Therefore, the application can process several conversion results with minimal software overhead.
5.6.1.4.2 Library Usage Model
Usage Model
The set of interface routines for the ADC Peripheral Library are:
Library Interface
Section
Description
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5.6.1.4.3 How the Library Works
How the Library Works
The following processes are involved while using an ADC module:
• Initialization
• Controlling the sampling process
• Controlling the conversion process
• Accessing the results buffer
5.6.1.4.3.1 General
The ADC conversion process can be thought of in terms of a finite state machine. The sample state represents the time that the
input channel is connected to the S&H circuit and the signal is passed to the converter input. The convert state is transitory; the
module enters this state as soon as it exits the sample state and transitions to a different state when that is done. The inactive
state is the default state prior to module initialization and following a software-controlled conversion; it can be avoided in
operation by using Auto-Sample mode.
Description
ADC Conversion Sequence or State Machine
5.6.1.4.3.2 Initialization
This topic provides information on the different processes needed to perform an analog-to-digital conversion.
Description
The following processes should be followed for performing an analog-to-digital conversion:
Initialize the ADC Module:
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Number Description Functions associated
1 Selecting the voltage reference source
Idle mode control
PLIB_ADC_VoltageReferenceSelect
PLIB_ADC_StopInIdleEnable/
PLIB_ADC_StopInIdleDisable
2 Selecting the ADC conversion clock PLIB_ADC_ConversionClockSet
3 Input channel selection
Configuring MUX A and MUX B inputs,
Alternating MUX A and MUX B input
selections,
Scanning through several inputs
Scan Mask Selection
PLIB_ADC_InputScanMaskAdd
PLIB_ADC_InputScanMaskRemove
Positive Inputs
PLIB_ADC_InputSelectPositive
PLIB_ADC_MuxChannel0InputPositiveSelect
PLIB_ADC_MuxChannel123InputPositiveSelect
Negative Inputs
PLIB_ADC_InputSelectNegative
PLIB_ADC_MuxChannel0InputNegativeSelect
PLIB_ADC_MuxChannel123InputNegativeSelect
Scan Mode Selection
PLIB_ADC_MuxAInputScanEnable
PLIB_ADC_MuxAInputScanDisable
4 Enabling the ADC module PLIB_ADC_Enable
5 Determine how many S&H channels
will be used
PLIB_ADC_ChannelGroupSelect
6 Determine how sampling will occur Sampling Control
PLIB_ADC_SamplingModeEnable
PLIB_ADC_SamplingModeDisable
PLIB_ADC_SampleAcqusitionTimeSet
7 Selecting Manual or Auto-Sampling PLIB_ADC_SampleAutoStartEnable
PLIB_ADC_SampleAutoStartDisable
PLIB_ADC_SamplingStart
8 Select conversion trigger and sampling
time
PLIB_ADC_ConversionStart
PLIB_ADC_ConversionClockSourceSelect
PLIB_ADC_ConversionTriggerSourceSelect
PLIB_ADC_ConversionStopSequenceEnable/
PLIB_ADC_ConversionStopSequenceDisable
9 Select how conversion results are
stored in buffer
PLIB_ADC_ResultBufferModeSelect
10 Select the result format
Result sign
PLIB_ADC_ResultFormatSelect
PLIB_ADC_ResultSignGet
11 Select the number of readings per
interrupt
PLIB_ADC_SamplesPerInterruptSelect
12 Select number of samples in DMA
buffer for each ADC module and select
how the DMA will access the ADC
buffers
PLIB_ADC_DMAEnable/PLIB_ADC_DMADisable
PLIB_ADC_DMABufferModeSelect
PLIB_ADC_DMAAddressIncrementSelect
PLIB_ADC_DMAInputBufferSelect
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13 Select the 10-bit or 12-bit mode PLIB_ADC_ResultSizeSelect
14 Channel pair configuration PLIB_ADC_PairTriggerSourceSelect
PLIB_ADC_PairConversionStart
PLIB_ADC_PairInterruptRequestEnable
PLIB_ADC_PairInterruptRequestDisable
15 Miscellaneous ADC functions:
Asynchronous sampling selection
Early interrupt control
Conversion order selection
Global software trigger control
User ISR jump address
PLIB_ADC_AsynchronousDedicatedSamplingEnable
PLIB_ADC_AsynchronousDedicatedSamplingDisable
PLIB_ADC_PairInterruptAfterFirstConversion
PLIB_ADC_PairInterruptAfterSecondConversion
PLIB_ADC_ConversionOrderSelect
PLIB_ADC_GlobalSoftwareTriggerSet
PLIB_ADC_IsrJumpTableBaseAddressSet
Reference Channels Initialization:
Internal reference channels like band gap voltage [ADC_REFERENCE_INPUT_VBG_DIV_BY_1], half of the band gap
[ADC_REFERENCE_INPUT_VBG_DIV_BY_2] or one-sixth voltage band gap [ADC_REFERENCE_INPUT_VBG_DIV_BY_6]
can be enabled or disabled through the APIs PLIB_ADC_InternalReferenceChannelEnable and
PLIB_ADC_InternalReferenceChannelDisable respectively with appropriate parameters. The same APIs can be used to control
the internal core voltage [ADC_REFERENCE_INPUT_VDDCORE] channels.
ADC Pairs Initialization:
Some ADC modules convert analog inputs in pairs. The analog input pair is a combination of an even and odd numbered analog
input, such as AN0 and AN1, AN2, AN3, and so on. The technique of using pairs is particularly useful in power conversion
applications that require voltage and current measurement for each PWM control loop.
• An interrupt request can be enabled/disabled using the API
PLIB_ADC_PairInterruptRequestEnable/PLIB_ADC_PairInterruptRequestDisable
• A software trigger can be activated using the API PLIB_ADC_PairConversionStart
• Each ADC input pair can select an individual software trigger as a trigger source via the API
PLIB_ADC_PairTriggerSourceSelect
• Each ADC input pair can select the global software trigger as a trigger source via the API
PLIB_ADC_GlobalSoftwareTriggerSet
Each analog input uses a dedicated result register to store the converted result. For example, AN0 conversion results are always
stored in the ADCBUF0 register and AN1 conversion results are always stored in the ADCBUF1 register.
Conversion Result Handling Using DMA:
DMA can be enabled or disabled using PLIB_ADC_DMAEnable and PLIB_ADC_DMADisable, respectively. The DMA Buffer
Build mode feature controlled through PLIB_ADC_DMABufferModeSelect determines how the conversion results are filled in the
DMA RAM buffer area being used for the ADC. With the parameter ADC_DMA_BUFFER_MODE_ORDER_OF_CONV, DMA
buffers are written in the order of conversion; otherwise, with ADC_DMA_BUFFER_MODE_SCATTER_GATHER, DMA buffers
are written in Scatter/Gather mode. In the Scatter/Gather mode, the DMA channel must be configured for Peripheral Indirect
Addressing. The DMA buffer is divided into consecutive memory blocks corresponding to all available analog inputs (out of
AN0-AN31). Each conversion result for a particular analog input is automatically transferred by the ADC module to the
corresponding block within the user-defined DMA buffer area. Successive samples for the same analog input are stored in
sequence within the block assigned to that input.
The number of samples that need to be stored in the DMA buffer for each analog input is controlled by
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PLIB_ADC_DMAInputBufferSelect. The rate at which this internal pointer is incremented when data is written to the DMA buffer
is controlled by PLIB_ADC_DMAAddressIncrementSelect.
1. Configure the ADC interrupt (if required):
• Clear the interrupt status flag
• Select the ADC interrupt priority
• Enable the ADC interrupt
2. Configure the DMA Channel.
3. Turn on the ADC module using API PLIB_ADC_Enable.
Example Initialization:
// Include all channels in scan
PLIB_ADC_InputScanMaskAdd(MY_ADC_INSTANCE, ADC_INPUT_SCAN_ALL);
// Internal Counter triggers conversion
PLIB_ADC_ConversionTriggerSourceSelect(MY_ADC_INSTANCE, ADC_CONVERSION_TRIGGER_INTERNAL_COUNT);
// Sample Time = 31TAD and TAD = 2TCY
PLIB_ADC_SampleAcqusitionTimeSet(MY_ADC_INSTANCE, 30);
PLIB_ADC_ConversionClockSet(MY_ADC_INSTANCE, 80000000, 320000000);
// Set the interrupt every 16 samples
PLIB_ADC_SamplesPerInterruptSelect(MY_ADC_INSTANCE, ADC_SAMPLES_PER_INTERRUPT_16);
// Enable scanning of channels
PLIB_ADC_ScanMuxAInputEnable(MY_ADC_INSTANCE);
// Enable the ADC
PLIB_ADC_Enable(MY_ADC_INSTANCE);
Note: Not all functionality is available on all devices. Refer to the "Analog-to-Digital Converter (ADC)" chapter in the specific
device data sheet for availability.
5.6.1.4.3.3 Controlling the Sampling Process
This topic describes the modes and related sampling functionality for the sampling process.
Description
The sampling process can be set up using the following two modes:
• Manual Sampling: Calling PLIB_ADC_SamplingStart causes the ADC to begin sampling. One of several options as
discussed in "Controlling the Conversion Process" can be used to end sampling and complete conversions. Sampling does
not resume until PLIB_ADC_SamplingStart is called again.
• Automatic Sampling: Setting the ADC in the Auto-Sampling mode using PLIB_ADC_SampleAutoStartEnable automatically
begins sampling a channel whenever a conversion is not active on that channel. One of several options can be used to end
sampling and complete conversions, as discussed in "Controlling the Conversion Process". If the simultaneous sampling is
selected using PLIB_ADC_SamplingModeEnable with parameter ADC_SAMPLING_MODE_SIMULTANEOUS, sampling on a
channel resumes after the conversion of all channels completes.
Other sampling related functionality:
• Monitoring Sample Status: PLIB_ADC_SamplingIsActive obtains the status as sampling or holding for the ADC module.
• Aborting a Sample: While in Manual Sampling mode, calling PLIB_ADC_SamplingStop will terminate sampling. If the
conversion trigger source is selected as ADC_CONVERSION_TRIGGER_SAMP_CLEAR using
PLIB_ADC_ConversionTriggerSourceSelect, this causes a conversion to start automatically. While in Auto-Sampling mode,
calling PLIB_ADC_SampleAutoStartEnable does not terminate an outgoing sample/convert sequence; however, sampling will
not resume after a subsequent conversion.
• Sampling Modes: Different sampling modes can be changed using PLIB_ADC_SamplingModeEnable with the appropriate
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parameter such as ADC_SAMPLING_MODE_ALTERNATE_INPUT for alternate input mode,
ADC_SAMPLING_MODE_SIMULTANEOUS for simultaneous sampling mode, or ADC_SAMPLING_MODE_SEQUENTIAL
for the sequential sampling mode. There is a possibility to combine the sampling modes say the Alternate input mode with
either the simultaneous or the sequential sampling modes.
Note: Not all functionality is available on all devices. Refer to the "Analog-to-Digital Converter (ADC)" chapter in the specific
device data sheet for availability.
5.6.1.4.3.4 Controlling the Conversion Process
The conversion trigger source will terminate sampling and start a selected sequence of conversions. It is also possible to obtain
the value of the conversion clock, which is obtained by calling PLIB_ADC_ConversionClockGet.
'PLIB_ADC_ConversionTriggerSourceSelect' selects the source of the conversion trigger.
Description
Conversion can be started in one of the following three ways:
1. Manual Conversion Sequence:
• Manual Sample Start, Manual Conversion Start: When ADC_CONVERSION_TRIGGER_SAMP_CLEAR is selected using
PLIB_ADC_ConversionTriggerSourceSelect, the conversion trigger is under software control. Calls to
PLIB_ADC_SamplingStop will stop the sampling and start the conversion sequence. The user must call
PLIB_ADC_SamplingStart and PLIB_ADC_SamplingStop in a timed manner, to ensure adequate sampling time.
Converting One Channel, Manual Sample Start, Manual Conversion Start
• Automatic Sample Start, Manual Conversion Start: Automatic sampling is initiated using
PLIB_ADC_SampleAutoStartEnable, calling PLIB_ADC_SamplingStop will terminate sampling and start conversion. After the
conversion, the sampling starts again automatically. The user must call PLIB_ADC_SamplingStop in a timed manner, to
ensure adequate sampling time. Wait for required acquisition/auto sample time (minimum of 1 TAD), and then call
PLIB_ADC_SamplingStop to start the conversion process.
Converting One Channel, Automatic Sample Start, Manual Conversion Start
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2. Clocked Conversion Sequence:
• Manual Sample Start and TAD based Conversion Start: When ADC_CONVERSION_TRIGGER_INTERNAL_COUNT is
selected using PLIB_ADC_ConversionTriggerSourceSelect, the conversion trigger is under analog-to-digital clock control.
PLIB_ADC_SampleAcqusitionTimeSet selects the TAD clock cycles between the start of sampling and the start of conversion.
[Minimum 1 clock cycle has to be selected to ensure the sampling requirements are met]. PLIB_ADC_SamplingStart starts the
sampling for the configured acquisition time, and then PLIB_ADC_SamplingStop starts the conversion process.
Converting One Channel, Manual Sample Start, TAD-Based Conversion Start
• Auto Sample Start and TAD based Conversion Start or Free Running Sample Conversion: With the selection of
ADC_CONVERSION_TRIGGER_INTERNAL_COUNT using PLIB_ADC_ConversionTriggerSourceSelect and Automatic
sampling initiation using PLIB_ADC_SampleAutoStartEnable allows the ADC module to schedule sample/conversion
sequences with no intervention by the user or other device resources.
Converting One Channel, Auto-Sample Start, TAD-Based Conversion Start
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3. Event Trigger Conversion Start: It might be necessary to synchronize the end of sampling and the start of conversion with
some other time event. The ADC module may use one of following as conversion trigger sequences:
• External Pin Trigger: When ADC_CONVERSION_TRIGGER_INT0_TRANSITION is selected using
PLIB_ADC_ConversionTriggerSourceSelect
• General Purpose Timer Compare Match: When ADC_CONVERSION_TRIGGER_TMR3_COMPARE_MATCH or
ADC_CONVERSION_TRIGGER_TMR5_COMPARE_MATCH is selected using
PLIB_ADC_ConversionTriggerSourceSelect
Both of the event trigger conversion modes previously described can be used in combination with auto-sampling
(PLIB_ADC_SampleAutoStartEnable) to cause the ADC to synchronize the sample conversion events to the trigger pulse source.
Users should note that some devices have additional conversion trigger sources as part of the enumeration
ADC_CONVERSION_TRIGGER_SOURCE.
Other operations during Conversion process:
• Monitoring Conversion process: The status of the conversion can be obtained using PLIB_ADC_ConversionHasCompleted
• Generating ADC Interrupt: PLIB_ADC_SamplesPerInterruptSelect controls the generation of the ADC interrupt. To enable
the interrupt it is also essential to enable the ADC interrupt.
• Aborting the Conversion: Calling PLIB_ADC_Disable will abort the current conversion. The result buffer is not updated with
the partially completed ADC conversion sequence.
• ADC pair conversion status can be obtained from PLIB_ADC_PairConversionIsPending
Timing Details:
• TAD - The ADC module has a maximum rate at which conversions may be completed. An analog module clock, TAD, controls
the conversion timing.
• TSAMP - The time required to sample and hold the sampled analog signal, configured through
PLIB_ADC_SampleAcqusitionTimeSet
• TCONV - The time required to convert the sampled analog signal, configured through PLIB_ADC_ConversionClockSet. The
conversion clock can be verified using PLIB_ADC_ConversionClockGet.
Note: Not all functionality is available on all devices. Refer to the "Analog-to-Digital Converter (ADC)" chapter in the specific
device data sheet for availability.
5.6.1.4.3.5 Accessing the Result Buffers
The result buffers can be formatted to the desired format using the function PLIB_ADC_ResultFormatSelect.
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Description
As the analog-to-digital conversions are completed, the ADC module writes the results of the conversions into the ADC result
buffer. This buffer is a RAM array of 16 words, accessed through the Special Function Register (SFR) space.
User software may attempt to read each ADC conversion result as it is generated; however, this might consume too much CPU
time. Generally, to minimize software overhead, the ADC module will fill the buffer with results, and then generate an interrupt
when the buffer is filled. There are two different modes for accessing the result buffers.
Note: Refer to the "Analog-to-Digital Converter (ADC)" chapter in the specific device data sheet to determine the correct
mode for accessing the result buffer for your device.
• Single Buffer mode: Conversion results are automatically stored in a dedicated buffer. The module sets its interrupt flag after
the conversion is complete, it also marks the conversion status as complete. After the interrupt, the conversion sequence can
restart. For 8-bit results, the converted values are available through PLIB_ADC_ResultGet.
• Multi Buffer mode: Conversion results are automatically stored in a dedicated position in the result buffer comprising an
array of 16 words, allowing for multiple successive readings to be taken before software service is needed. Successive
conversions are placed into sequential buffer positions. Alternatively, the buffer can be split into two arrays of 8 words for
simultaneous conversion and read operations. The ADC module sets its interrupt flag after a selectable number of
conversions, from 1 to 16, when the all buffer positions can be read. After the interrupt, the sequence restarts at the beginning
of the buffer. When the interrupt flag is set, scan selections and the output buffer pointer return to their starting positions. The
ADC result buffer is a set of 16 words, accessed through PLIB_ADC_ResultGetByIndex , where buffer index can be can be
any value ranging from 0 to 15.
• PLIB_ADC_SamplesPerInterruptSelect selects how many analog-to-digital conversions will take place before the CPU is
interrupted
• The buffer fill mode can be selected using PLIB_ADC_ResultBufferModeSelect with the parameter of the type
ADC_BUFFER_MODE
• When the conversion result buffer is split (ADC_BUFFER_MODE_TWO_8WORD_BUFFERS used as the parameter for
PLIB_ADC_ResultBufferModeSelect), PLIB_ADC_ResultBufferIsFull indicates which half of the buffer is being currently
written by the ADC module
• DMA Buffer mode: The ADC result buffer is a single word register that stores the ADC conversion result. DMA data transfer
can be used to to buffer more than one conversion result, before triggering an interrupt. If no DMA is to be used, each result
should be read by the user application using PLIB_ADC_ResultGet before it is overwritten by the next conversion. ADC DMA
is enabled through PLIB_ADC_DMAEnable.
• The DMA buffer build mode selected using PLIB_ADC_DMABufferModeSelect with the parameter of type
ADC_DMA_BUFFER_MODE, which determines how the conversion results are filled in the DMA buffer area. If
ADC_DMA_BUFFER_MODE_SCATTER_GATHER is selected, the ADC module needs to provide a scatter/gather
address to the DMA channel based on the index of the analog input and size of the DMA buffer. If
ADC_DMA_BUFFER_MODE_ORDER_OF_CONV is selected, the ADC module provides the address of the non-DMA
stand-alone buffer.
• PLIB_ADC_DMAInputBufferSelect selects the number of samples that need to be stored in the DMA buffer for each analog
input
• Miscellaneous:
• Output result sign (positive or negative) is available through PLIB_ADC_ResultSignGet
• ADC pair sample availability can be checked using PLIB_ADC_PairSampleIsAvailable
Note: Not all functionality is available on all devices. Refer to the "Analog-to-Digital Converter (ADC)" chapter in the specific
device data sheet for availability.
5.6.1.4.3.6 Power-Saving Modes
This topic provides information on the power-saving modes available for use with the ADC module.
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Description
Operation in Sleep mode: Operation in Sleep mode requires that the internal RC clock is selected using
PLIB_ADC_ConversionClockSourceSelect with the parameter ADC_CLOCK_SOURCE_INTERNAL_RC. If the ADC interrupt is
enabled, the device will wake up from Sleep mode on the ADC interrupt. On some microcontrollers, operation in Sleep mode
requires that ADC_CONVERSION_CLOCK_FRC is selected using PLIB_ADC_ConversionClockSourceSelect. If the ADC
interrupt is enabled, the device will wake up from Sleep mode on the ADC interrupt.
Operation in Idle mode: PLIB_ADC_StopInIdleEnable and PLIB_ADC_StopInIdleDisable determine if the ADC module stops or
continues operation in Idle mode. If PLIB_ADC_StopInIdleDisable is used, the module will continue operation in Idle mode. If the
ADC interrupt is enabled, the device will wake up from Idle mode on the ADC interrupt. If PLIB_ADC_StopInIdleEnable is used,
the module will stop in Idle mode. If the device enters Idle mode in the middle of conversion, the conversion is aborted.
Operation in other Power-Saving modes: If the ADC module is expected to operate in a power-saving mode, configure the
acquisition time and the conversion clock using the functions in accordance with the power-saving mode clock that will be used.
After the power-saving mode is entered, an analog-to-digital acquisition can be started. Once the acquisition is started, the
device can continue to be clocked by the same power-saving source until the conversion has completed. If desired, the device
may be placed in the power-saving Idle mode during conversion.
Note: Not all functionality is available on all devices. Refer to the "Analog-to-Digital Converter (ADC)" chapter in the specific
device data sheet for availability.
5.6.1.4.3.7 Conversion Sequence Examples
This topic provides examples on how the sampling and conversion will occur in various configurations.
Description
Converting Single Channel, Manual Sample Start, Manual Conversion Start
// Where MY_ADC_INSTANCE, is the instance of ADC that the application is using. It is one of
the possible values
// from ADC_MODULE_ID
int16_t ADCValue;
// Enabling the sampling manually
PLIB_ADC_ConversionTriggerSourceSelect(MY_ADC_INSTANCE, ADC_CONVERSION_TRIGGER_SAMP_CLEAR);
// Disabling ADC Input channels for Scan
PLIB_ADC_ScanMaskRemove(MY_ADC_INSTANCE, ADC_INPUT_SCAN_ALL);
// Connect AN2 as Positive Input
PLIB_ADC_MuxChannel0InputPositiveSelect(ADC_ID_1, ADC_MUX_A, ADC_INPUT_POSITIVE_AN2);
// Manual Sample and TAD = 2TCY
PLIB_ADC_SampleAcqusitionTimeSet(MY_ADC_INSTANCE, 2);
PLIB_ADC_ConversionClockSet(MY_ADC_INSTANCE, 80000000, 320000000);
// Enable the ADC
PLIB_ADC_Enable(MY_ADC_INSTANCE);
while(1)
{
// Start Sampling
PLIB_ADC_SamplingStart(MY_ADC_INSTANCE);
Delay(); // Ensure, correct sampling time has elapsed before starting conversion.
// Is Conversion Done ??
while(!PLIB_ADC_ConversionHasCompleted(MY_ADC_INSTANCE));
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ADCValue = PLIB_ADC_ResultGetByIndex(MY_ADC_INSTANCE, 0);
}
Converting Single Channel, Manual Sample Start, TAD-based Conversion Start
// Where MY_ADC_INSTANCE, is the instance of ADC that the application is using. It is one of
the possible values
// from ADC_MODULE_ID
int16_t ADCValue;
// Internal Counter triggers conversion
PLIB_ADC_ConversionTriggerSourceSelect(MY_ADC_INSTANCE, ADC_CONVERSION_TRIGGER_INTERNAL_COUNT);
// Connect AN12 as Positive Input
PLIB_ADC_MuxChannel0InputPositiveSelect(ADC_ID_1, ADC_MUX_A, ADC_INPUT_POSITIVE_AN12);
// Disabling ADC Input channels for Scan
PLIB_ADC_ScanMaskRemove(MY_ADC_INSTANCE, ADC_INPUT_SCAN_ALL);
// Sample Time = 31TAD and TAD = 2TCY
PLIB_ADC_SampleAcqusitionTimeSet(MY_ADC_INSTANCE, 30);
PLIB_ADC_ConversionClockSet(MY_ADC_INSTANCE, 80000000, 320000000);
// Enable the ADC
PLIB_ADC_Enable(MY_ADC_INSTANCE);
while(1)
{
// Start Sampling
PLIB_ADC_SamplingStart(MY_ADC_INSTANCE);
// Is Conversion Done ??
while(!PLIB_ADC_ConversionHasCompleted(MY_ADC_INSTANCE));
ADCValue = PLIB_ADC_ResultGetByIndex(MY_ADC_INSTANCE, 0);
}
Converting Single Channel, Automatic Sample Start, TAD-based Conversion Start
// Where MY_ADC_INSTANCE, is the instance of ADC that the application is using. It is one of
the possible values
// from ADC_MODULE_ID
int16_t ADCValue;
uint8_t index;
// Internal Counter triggers conversion
PLIB_ADC_ConversionTriggerSourceSelect(MY_ADC_INSTANCE, ADC_CONVERSION_TRIGGER_INTERNAL_COUNT);
// Connect AN12 as Positive Input
PLIB_ADC_MuxChannel0InputPositiveSelect(ADC_ID_1, ADC_MUX_A, ADC_INPUT_POSITIVE_AN12);
// Disabling ADC Input channels for Scan
PLIB_ADC_ScanMaskRemove(MY_ADC_INSTANCE, ADC_INPUT_SCAN_ALL);
// Sample Time = 31TAD and TAD = 2TCY
PLIB_ADC_SampleAcqusitionTimeSet(MY_ADC_INSTANCE, 30);
PLIB_ADC_ConversionClockSet(MY_ADC_INSTANCE, 80000000,320000000);
// Set the interrupt every 3 samples
PLIB_ADC_SamplesPerInterruptSelect(MY_ADC_INSTANCE, ADC_3SAMPLES_PER_INTERRUPT);
// Enable the ADC
PLIB_ADC_Enable(MY_ADC_INSTANCE);
while(1)
{
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ADCValue = 0;
// Auto Start Sampling and then go to conversion
PLIB_ADC_SampleAutoStartEnable(MY_ADC_INSTANCE);
// Is Conversion Done ??
while(!PLIB_ADC_ConversionHasCompleted(MY_ADC_INSTANCE));
// Yes, stop sample/convert
PLIB_ADC_SampleAutoStartDisable(MY_ADC_INSTANCE);
// Average the 2 ADC values
for(index = 0; index < 2; index++)
{
ADCValue = ADCValue + PLIB_ADC_ResultGetByIndex(MY_ADC_INSTANCE, index);
}
ADCValue = ADCValue >> 1;
} // Repeat
Converting Single Channel, Automatic Sample Start, Conversion Trigger-based Conversion Start
// Where MY_ADC_INSTANCE, is the instance of ADC that the application is using. It is one of
the possible values
// from ADC_MODULE_ID
int16_t ADCValue;
// General Purpose Timer 3 compare match ends sampling and starts conversion
PLIB_ADC_ConversionTriggerSourceSelect(MY_ADC_INSTANCE,
ADC_CONVERSION_TRIGGER_TMR3_COMPARE_MATCH);
// Connect AN12 as Positive Input
PLIB_ADC_MuxChannel0InputPositiveSelect(ADC_ID_1, ADC_MUX_A, ADC_INPUT_POSITIVE_AN12);
// Disabling ADC Input channels for Scan
PLIB_ADC_ScanMaskRemove(MY_ADC_INSTANCE, ADC_INPUT_SCAN_ALL);
// Sample Time = 31TAD and TAD = 2TCY
PLIB_ADC_SampleAcqusitionTimeSelect(MY_ADC_INSTANCE, 30);
PLIB_ADC_ConversionClockSelect(MY_ADC_INSTANCE, 1);
// Configure the timer to generate period match as per the acquisition requirements
TMR3 = 0x0000; // set TMR3 to time out every 125 ms
PR3 = 0x3FFF;
T3CON = 0x8010;
// Enable the ADC
PLIB_ADC_Enable(MY_ADC_INSTANCE);
while(1)
{
// Auto Start Sampling and then go to conversion
PLIB_ADC_SampleAutoStartEnable(MY_ADC_INSTANCE);
// Is Conversion Done ??
while(!PLIB_ADC_ConversionHasCompleted(MY_ADC_INSTANCE));
// Yes, stop sample/convert
PLIB_ADC_SampleAutoStartDisable(MY_ADC_INSTANCE);
ADCValue += PLIB_ADC_ResultGetByIndex(MY_ADC_INSTANCE, 0);
}
Sampling and Converting a Single Channel Multiple Times
// Where MY_ADC_INSTANCE, is the instance of ADC that the application is using. It is one of
the possible values
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// from ADC_MODULE_ID
int16_t ADCValue;
uint8_t index;
// Internal Counter triggers conversion
PLIB_ADC_ConversionTriggerSourceSelect(MY_ADC_INSTANCE, ADC_CONVERSION_TRIGGER_INTERNAL_COUNT);
// Connect AN12 as Positive Input
PLIB_ADC_MuxChannel0InputPositiveSelect(ADC_ID_1, ADC_MUX_A, ADC_INPUT_POSITIVE_AN12);
// Disabling ADC Input channels for Scan
PLIB_ADC_ScanMaskRemove(MY_ADC_INSTANCE, ADC_INPUT_SCAN_ALL);
// Sample Time = 31TAD and TAD = 2TCY
PLIB_ADC_SampleAcqusitionTimeSet(MY_ADC_INSTANCE, 30);
PLIB_ADC_ConversionClockSet(MY_ADC_INSTANCE, 80000000, 320000000);
// Set the interrupt every 16 samples
PLIB_ADC_SamplesPerInterruptSelect(MY_ADC_INSTANCE, ADC_16SAMPLES_PER_INTERRUPT);
// Enable the ADC
PLIB_ADC_Enable(MY_ADC_INSTANCE);
while(1)
{
ADCValue = 0;
// Auto Start Sampling and then go to conversion
PLIB_ADC_SampleAutoStartEnable(MY_ADC_INSTANCE);
// Is Conversion Done ??
while(!PLIB_ADC_ConversionHasCompleted(MY_ADC_INSTANCE));
// Yes, stop sample/convert
PLIB_ADC_SampleAutoStartDisable(MY_ADC_INSTANCE);
// Average the 16 ADC value
for(index = 0; index < 16; index++)
{
ADCValue = ADCValue + PLIB_ADC_ResultGetByIndex(MY_ADC_INSTANCE, index);
}
ADCValue = ADCValue >> 4;
} // Repeat
Sampling and Converting all Channels
// Where MY_ADC_INSTANCE, is the instance of ADC that the application is using. It is one of
the possible values
// from ADC_MODULE_ID
int ADCValue, index;
// Include all channels in scan
PLIB_ADC_ScanMaskAdd(MY_ADC_INSTANCE, ADC_INPUT_SCAN_ALL);
// Internal Counter triggers conversion
PLIB_ADC_ConversionTriggerSourceSelect(MY_ADC_INSTANCE, ADC_CONVERSION_TRIGGER_INTERNAL_COUNT);
// Sample Time = 31TAD and TAD = 2TCY
PLIB_ADC_SampleAcqusitionTimeSet(MY_ADC_INSTANCE, 30);
PLIB_ADC_ConversionClockSet(MY_ADC_INSTANCE, 80000000, 320000000);
// Set the interrupt every 16 samples
PLIB_ADC_SamplesPerInterruptSelect(MY_ADC_INSTANCE, ADC_16SAMPLES_PER_INTERRUPT);
// Enable scanning of channels
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PLIB_ADC_ScanMuxAInputEnable(MY_ADC_INSTANCE);
// Enable the ADC
PLIB_ADC_Enable(MY_ADC_INSTANCE);
while(1)
{
ADCValue = 0;
// Auto Start Sampling and then go to conversion
PLIB_ADC_SampleAutoStartEnable(MY_ADC_INSTANCE);
// Is Conversion Done ??
while(!PLIB_ADC_ConversionHasCompleted(MY_ADC_INSTANCE));
// Yes, stop sample/convert
PLIB_ADC_SampleAutoStartDisable(MY_ADC_INSTANCE);
// Average the 16 ADC value
for(index = 0; index < 16; index++)
{
ADCValue = ADCValue + PLIB_ADC_ResultGetByIndex(MY_ADC_INSTANCE, index);
}
ADCValue = ADCValue >> 4;
} // Repeat
Wait for Sample, Manual Conversion Start
// Where MY_ADC_INSTANCE, is the instance of ADC that the application is using. It is one of
the possible values
// from ADC_MODULE_ID
uint8_t ADCValue;
// Internal Counter triggers conversion
PLIB_ADC_ConversionTriggerSourceSelect(MY_ADC_INSTANCE, ADC_CONVERSION_TRIGGER_INTERNAL_COUNT);
// Connect AN12 as Positive Input
PLIB_ADC_MuxChannel0InputPositiveSelect(ADC_ID_1, ADC_MUX_A, ADC_INPUT_POSITIVE_AN12);
// Disabling ADC Input channels for Scan
PLIB_ADC_ScanMaskRemove(MY_ADC_INSTANCE, ADC_INPUT_SCAN_ALL);
// Sample Time = 31TAD and TAD = 2TCY
PLIB_ADC_SampleAcqusitionTimeSet(MY_ADC_INSTANCE, 30);
PLIB_ADC_ConversionClockSet(MY_ADC_INSTANCE, 80000000, 320000000);
// Connect AN12 as Positive Input
PLIB_ADC_InputSelectPositive(MY_ADC_INSTANCE, ADC_INPUT_POSITIVE_AN12);
// Enable the ADC
PLIB_ADC_Enable(MY_ADC_INSTANCE);
while(1)
{
Delay(); // Ensure, correct sampling time has elapsed before starting conversion.
// Start Sampling
PLIB_ADC_SamplingStop(MY_ADC_INSTANCE);
// Is Conversion Done ??
while(!PLIB_ADC_ConversionHasCompleted(MY_ADC_INSTANCE));
ADCValue = PLIB_ADC_ResultGetByIndex(MY_ADC_INSTANCE, 0);
}
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Wait for Sample, Triggered Conversion Start
// Where MY_ADC_INSTANCE, is the instance of ADC that the application is using. It is one of
the possible values
// from ADC_MODULE_ID
uint8_t ADCValue;
// Connect AN2 as Positive Input
PLIB_ADC_InputSelectPositive(MY_ADC_INSTANCE, ADC_INPUT_POSITIVE_AN2);
// Manual Sample and Conversion Clock
PLIB_ADC_ConversionClockSet(MY_ADC_INSTANCE, 80000000, 320000000);
// Enable the ADC
PLIB_ADC_Enable(MY_ADC_INSTANCE);
while(1)
{
Delay(); // Ensure, correct sampling time has elapsed
PLIB_ADC_ConversionTriggerSourceSelect(MY_ADC_INSTANCE,
ADC_CONVERSION_TRIGGER_INT0_TRANSITION);
// Is Conversion Done ??
while(!PLIB_ADC_ConversionHasCompleted(MY_ADC_INSTANCE));
ADCValue = PLIB_ADC_ResultGet(MY_ADC_INSTANCE);
}
Manual Sample Start, TAD-based Conversion Start
// Where MY_ADC_INSTANCE, is the instance of ADC that the application is using. It is one of
the possible values
// from ADC_MODULE_ID
uint8_t ADCValue;
// Connect AN2 as Positive Input
PLIB_ADC_InputSelectPositive(MY_ADC_INSTANCE, ADC_INPUT_POSITIVE_AN2);
// Sample Time = 1TAD and TAD = 2TCY
PLIB_ADC_SampleAcqusitionTimeSet(MY_ADC_INSTANCE, 0);
PLIB_ADC_ConversionClockSet(MY_ADC_INSTANCE, 80000000, 320000000);
// Enable the ADC
PLIB_ADC_Enable(MY_ADC_INSTANCE);
while(1)
{
// Start Sampling
PLIB_ADC_SamplingStart(MY_ADC_INSTANCE);
// Is Conversion Done ??
while(!PLIB_ADC_ConversionHasCompleted(MY_ADC_INSTANCE));
ADCValue = PLIB_ADC_ResultGet(MY_ADC_INSTANCE);
}
5.6.1.5 Configuring the Library
The library is configured for the supported ADC modules with the multi-buffer interface when the processor is chosen in the
MPLAB IDE.
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5.6.1.6 Library Interface
Channel Pairs Control
Name Description
PLIB_ADC_PairConversionIsPending Informs whether conversion is pending or complete.
PLIB_ADC_PairConversionStart Start conversion of the requested ADC pair.
PLIB_ADC_PairInterruptAfterFirstConversion ADC pair conversion interrupt is generated after the first
conversion.
PLIB_ADC_PairInterruptAfterSecondConversion ADC pair conversion interrupt is generated after the second
conversion.
PLIB_ADC_PairInterruptRequestDisable Disable IRQ generation for the ADC pair.
PLIB_ADC_PairInterruptRequestEnable Enable IRQ generation for the ADC pair.
PLIB_ADC_PairSampleIsAvailable Provides status of the ADC pair sample availability in the buffer.
PLIB_ADC_PairSampleStatusClear Clears the ADC pair ready status flag.
PLIB_ADC_PairTriggerSourceSelect Selects trigger source for the requested ADC pair.
Conversion Control Logic
Name Description
PLIB_ADC_ConversionStart Starts ADC module manual conversion process.
PLIB_ADC_ConversionHasCompleted Provides the conversion completion status of the ADC.
PLIB_ADC_ConversionTriggerSourceSelect Selects the conversion trigger source.
PLIB_ADC_ConversionStopSequenceEnable Stop conversion sequence (when the first ADC module interrupt is
generated).
PLIB_ADC_ConversionStopSequenceDisable Normal conversion sequence.
PLIB_ADC_ConversionClockSet Sets the ADC module conversion clock.
PLIB_ADC_ConversionClockGet Obtains the conversion clock.
PLIB_ADC_ConversionClockSourceSelect Selects the ADC module conversion clock source.
PLIB_ADC_ConversionTriggerGroupSelect Selects the conversion trigger source group.
PLIB_ADC_ConversionOrderSelect Selects the conversion order.
Data Types & Constants
Name Description
ADC_MODULE_ID Identifies the supported ADC modules supported.
ADC_VOLTAGE_REFERENCE Data type defining the different ADC Voltage Reference by which the
ADC can be configured.
ADC_INPUTS_NEGATIVE Data type defining the different ADC Negative Input Enumeration.
ADC_SAMPLES_PER_INTERRUPT Data type defining the Samples Per Interrupt Enumeration.
ADC_CHANNEL_GROUP Data type defines the ADC Channel Group.
ADC_CLOCK_SOURCE Data type defines the ADC Clock Source Select.
ADC_CONVERSION_TRIGGER_SOURCE Data type defines the ADC Conversion Trigger Source.
ADC_RESULT_SIZE Data type defines the ADC Result Size.
ADC_BUFFER_MODE Data type defines the ADC Buffer Mode.
ADC_RESULT_BUF_STATUS Data type defines the ADC Result Buffer Status
ADC_MUX Data type defining the different ADC MUX Enumeration.
ADC_SAMPLING_MODE Data type defines the ADC Sampling Mode Select.
ADC_INPUTS_SCAN Data type defines the ADC Scan inputs.
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ADC_REFERENCE_INPUT Data type defines the ADC Reference Input Enumeration.
ADC_RESULT_FORMAT Data type defines the ADC Result Format.
ADC_DMA_BUFFER_MODE Data type defines the ADC Buffer Mode.
ADC_PAIR Data type defines the ADC Pair.
ADC_CHANNEL123_INPUTS_NEG Data type defines the ADC Channel 123 Negative Input Select.
ADC_CHANNEL123_INPUTS_POS Data type defines the ADC Channel 123 Positive Input Select.
ADC_INPUTS_POSITIVE Data type defines the ADC inputs.
ADC_CONVERSION_ORDER Data type defines the ADC Conversion Order.
ADC_DMA_ADDRESS_INCREMENT Data type defines the ADC DMA Increment Rate.
ADC_DMA_INPUT_BUFFER Data type defines the ADC DMA Buffer Per Input.
ADC_ACQUISITION_TIME Data type defining the different ADC acquisition times by which the
ADC can be configured.
ADC_CONVERSION_CLOCK Data type defines the different ADC Conversion clock
ADC_SAMPLE Data type defining the size of the adc sample register.
DMA Transactions
Name Description
PLIB_ADC_DMAAddressIncrementSelect Selects the increment rate for the DMA address.
PLIB_ADC_DMABufferModeSelect DMA Buffer Build mode.
PLIB_ADC_DMADisable Disables the ADC Direct Memory Access (DMA).
PLIB_ADC_DMAEnable Enables the ADC Direct Memory Access (DMA).
PLIB_ADC_DMAInputBufferSelect Selects the number of DMA buffer locations per analog input.
Feature Existence
Name Description
PLIB_ADC_ExistsAsynchronousDedicatedSampling Identifies whether the AsynchronousDedicatedSampling
feature exists on the ADC module
PLIB_ADC_ExistsCalibrationControl Identifies whether the CalibrationControl feature exists on the
ADC module
PLIB_ADC_ExistsChannelGroup Identifies whether the ChannelGroup feature exists on the
ADC module
PLIB_ADC_ExistsConversionClock Identifies whether the ConversionClock feature exists on the
ADC module
PLIB_ADC_ExistsConversionClockSource Identifies whether the ConversionClockSource feature exists
on the ADC module
PLIB_ADC_ExistsConversionControl Identifies whether the ConversionControl feature exists on the
ADC module
PLIB_ADC_ExistsConversionOrder Identifies whether the ConversionOrder feature exists on the
ADC module
PLIB_ADC_ExistsConversionStatus Identifies whether the ConversionStatus feature exists on the
ADC module
PLIB_ADC_ExistsConversionStopSequenceControl Identifies whether the ConversionStopSequenceControl
feature exists on the ADC module
PLIB_ADC_ExistsConversionTriggerGroup Identifies whether the ConversionTriggerGroup feature exists
on the ADC module
PLIB_ADC_ExistsConversionTriggerSource Identifies whether the ConversionTriggerSource feature
exists on the ADC module
PLIB_ADC_ExistsDMAAddressIncrement Identifies whether the DMAAddressIncrement feature exists
on the ADC module
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PLIB_ADC_ExistsDMABufferMode Identifies whether the DMABufferMode feature exists on the
ADC module
PLIB_ADC_ExistsDMABuffersPerAnalogInput Identifies whether the DMABuffersPerInput feature exists on
the ADC module
PLIB_ADC_ExistsDMAControl Identifies whether the DMAControl feature exists on the ADC
module
PLIB_ADC_ExistsEnableControl Identifies whether the EnableControl feature exists on the
ADC module.
PLIB_ADC_ExistsGlobalSoftwareTrigger Identifies whether the GlobalSoftwareTrigger feature exists
on the ADC module
PLIB_ADC_ExistsInputSelect Identifies whether the InputSelect feature exists on the ADC
module
PLIB_ADC_ExistsInternalReferenceChannelControl Identifies whether the InternalReferenceChannelControl
feature exists on the ADC module
PLIB_ADC_ExistsISRJumpTableBaseAddress Identifies whether the ISRJumpTableBaseAddress feature
exists on the ADC module
PLIB_ADC_ExistsMuxChannel0NegativeInput Identifies whether the MuxChannel0NegativeInput feature
exists on the ADC module
PLIB_ADC_ExistsMuxChannel0PositiveInput Identifies whether the MuxChannel0PositiveInput feature
exists on the ADC module
PLIB_ADC_ExistsMuxChannel123NegativeInput Identifies whether the MuxChannel123NegativeInput feature
exists on the ADC module
PLIB_ADC_ExistsMuxChannel123PositiveInput Identifies whether the MuxChannel123PositiveInput feature
exists on the ADC module
PLIB_ADC_ExistsMuxInputScanControl Identifies whether the MuxInputScanControl feature exists on
the ADC module
PLIB_ADC_ExistsMuxInputScanSelect Identifies whether the MuxInputScanSelect feature exists on
the ADC module
PLIB_ADC_ExistsPairConversionControl Identifies whether the PairConversionControl feature exists
on the ADC module
PLIB_ADC_ExistsPairInterruptOnConversion Identifies whether the PairInterruptOnConversion feature
exists on the ADC module
PLIB_ADC_ExistsPairInterruptRequest Identifies whether the PairInterruptRequest feature exists on
the ADC module
PLIB_ADC_ExistsPairSampleStatus Identifies whether the PairSampleStatus feature exists on the
ADC module
PLIB_ADC_ExistsPairTriggerSource Identifies whether the PairTriggerSource feature exists on the
ADC module
PLIB_ADC_ExistsResultBufferFillStatus Identifies whether the ResultBufferFillStatus feature exists on
the ADC module
PLIB_ADC_ExistsResultBufferMode Identifies whether the ResultBufferMode feature exists on the
ADC module
PLIB_ADC_ExistsResultFormat Identifies whether the ResultFormat feature exists on the
ADC module
PLIB_ADC_ExistsResultGet Identifies whether the ResultGet feature exists on the ADC
module
PLIB_ADC_ExistsResultGetByIndex Identifies whether the ResultGetByIndex feature exists on the
ADC module
PLIB_ADC_ExistsResultSign Identifies whether the ResultSign feature exists on the ADC
module
PLIB_ADC_ExistsResultSize Identifies whether the ResultSize feature exists on the ADC
module
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PLIB_ADC_ExistsSampleResolution Identifies whether the SampleResolution feature exists on the
ADC module
PLIB_ADC_ExistsSamplesPerInterruptSelect Identifies whether the SamplesPerInterruptSelect feature
exists on the ADC module
PLIB_ADC_ExistsSamplingAcquisitionTime Identifies whether the SamplingAcquisitionTime feature exists
on the ADC module
PLIB_ADC_ExistsSamplingAutoStart Identifies whether the SamplingAutoStart feature exists on
the ADC module
PLIB_ADC_ExistsSamplingControl Identifies whether the SamplingControl feature exists on the
ADC module
PLIB_ADC_ExistsSamplingModeControl Identifies whether the SamplingModeControl feature exists on
the ADC module
PLIB_ADC_ExistsSamplingStatus Identifies whether the SamplingStatus feature exists on the
ADC module
PLIB_ADC_ExistsStopInIdleControl Identifies whether the StopInIdle feature exists on the ADC
module
PLIB_ADC_ExistsVoltageReference Identifies whether the VoltageReference feature exists on the
ADC module
General Configuration
Name Description
PLIB_ADC_Enable ADC module is enabled (turned ON).
PLIB_ADC_Disable ADC module is disabled (turned OFF).
PLIB_ADC_StopInIdleDisable Continue ADC module operation when the device is in Idle mode.
PLIB_ADC_StopInIdleEnable Discontinue ADC module operation when device enters Idle mode.
PLIB_ADC_VoltageReferenceSelect Voltage reference configuration.
PLIB_ADC_CalibrationEnable Calibration is performed on the next ADC conversion.
PLIB_ADC_CalibrationDisable Normal ADC module operation (no calibration is performed).
PLIB_ADC_InputSelectPositive Positive analog input channel selection.
PLIB_ADC_InputSelectNegative Analog negative channel selection.
PLIB_ADC_InputScanMaskAdd Select ADC analog channel for input scan.
PLIB_ADC_InputScanMaskRemove Omits ADC analog channel for input scan.
PLIB_ADC_InternalReferenceChannelEnable Internal reference input is enabled.
PLIB_ADC_InternalReferenceChannelDisable Internal reference input is disabled.
PLIB_ADC_ChannelGroupSelect Selects channels to be utilized.
Miscellaneous
Name Description
PLIB_ADC_AsynchronousDedicatedSamplingDisable Disables asynchronous dedicated S&H sampling.
PLIB_ADC_AsynchronousDedicatedSamplingEnable Enables asynchronous dedicated S&H sampling.
PLIB_ADC_GlobalSoftwareTriggerSet Global software trigger enable/set control.
PLIB_ADC_IsrJumpTableBaseAddressGet Gets the base address of the user's ADC Interrupt Service
Routine (ISR) jump table.
PLIB_ADC_IsrJumpTableBaseAddressSet Sets the base address of the user's ADC Interrupt Service
Routine (ISR) jump table.
Mux Selection and Channel Scan
Name Description
PLIB_ADC_MuxAInputScanDisable Do not scan input selections for CH0+ of MUX A.
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PLIB_ADC_MuxAInputScanEnable Scan input selections for CH0+ of MUX A.
PLIB_ADC_MuxChannel0InputNegativeSelect Channel 0 negative input select for multiplexer setting.
PLIB_ADC_MuxChannel0InputPositiveSelect Channel 0 positive input select for multiplexer setting.
PLIB_ADC_MuxChannel123InputNegativeSelect Channel 1, 2, and 3 negative input select.
PLIB_ADC_MuxChannel123InputPositiveSelect Channel 1, 2, and 3 positive input select.
Output Configuration
Name Description
PLIB_ADC_ResultBufferModeSelect Selects the result buffer mode.
PLIB_ADC_ResultBufferStatusGet Provides the buffer fill status.
PLIB_ADC_ResultFormatSelect Selects the result format.
PLIB_ADC_ResultGet Obtains the ADC sample/result value.
PLIB_ADC_ResultGetByIndex Provides the ADC conversion result based on the buffer index.
PLIB_ADC_ResultSignGet Obtains the ADC result sign.
PLIB_ADC_ResultSizeSelect Selects the ADC module mode/result size.
Sample and Hold Control Logic
Name Description
PLIB_ADC_SampleAcqusitionTimeSet Sets the ADC acquisition/auto-sample time in TADs.
PLIB_ADC_SampleAutoStartDisable Sampling auto-start is disabled.
PLIB_ADC_SampleAutoStartEnable Sampling auto-start is enabled.
PLIB_ADC_SampleMaxGet Provides the maximum sample value.
PLIB_ADC_SampleMinGet Provides the minimum sample value.
PLIB_ADC_SamplesPerInterruptSelect Interrupts at the completion of conversion for each nth sample.
PLIB_ADC_SamplingIsActive Provides the ADC sampling status.
PLIB_ADC_SamplingModeSelect Enable the selected sampling mode.
PLIB_ADC_SamplingStart Sampling is enabled.
PLIB_ADC_SamplingStop Holding is enabled.
Description
This section lists the interface routines, data types, constants and macros required for ADC library.
5.6.1.6.1 General Configuration
5.6.1.6.1.1 PLIB_ADC_Enable Function
C
void PLIB_ADC_Enable(
ADC_MODULE_ID index
);
Description
This function enables (turns ON) the selected ADC module.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsEnableControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_Enable(MY_ADC_INSTANCE);
5.6.1.6.1.2 PLIB_ADC_Disable Function
C
void PLIB_ADC_Disable(
ADC_MODULE_ID index
);
Description
This function disables (turns OFF) the selected ADC module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsEnableControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_Disable(MY_ADC_INSTANCE);
5.6.1.6.1.3 PLIB_ADC_StopInIdleDisable Function
C
void PLIB_ADC_StopInIdleDisable(
ADC_MODULE_ID index
);
Description
This function enables the ADC module to continue operation when the device is in Idle mode.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsStopInIdleControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_StopInIdleDisable(MY_ADC_INSTANCE);
5.6.1.6.1.4 PLIB_ADC_StopInIdleEnable Function
C
void PLIB_ADC_StopInIdleEnable(
ADC_MODULE_ID index
);
Description
This function discontinues ADC module operation when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsStopInIdleControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_StopInIdleEnable(MY_ADC_INSTANCE);
5.6.1.6.1.5 PLIB_ADC_VoltageReferenceSelect Function
C
void PLIB_ADC_VoltageReferenceSelect(
ADC_MODULE_ID index,
ADC_VOLTAGE_REFERENCE configValue
);
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Description
This function configures the ADC module voltage reference.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
configValue One of the possible values from ADC_VOLTAGE_REFERENCE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsVoltageReference in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_VoltageReferenceSelect(MY_ADC_INSTANCE, ADC_REFERENCE_VREFPLUS_TO_AVSS);
5.6.1.6.1.6 PLIB_ADC_CalibrationEnable Function
C
void PLIB_ADC_CalibrationEnable(
ADC_MODULE_ID index
);
Description
This function enables calibration to be performed on the next ADC conversion.
When the Calibration bit is enabled, inputs are disconnected and tied to AVss. This sets the inputs of the ADC to zero. Then, the
user can perform a conversion. Use of the Calibration mode is not affected if the ADC line has been configured as analog or
digital, nor by channel input selection. Any analog input switches are disconnected from the ADC module in this mode. The
conversion result is stored by the user software and is used to compensate subsequent conversions. This can be done by
adding the two’s complement of the result obtained during calibration to all normal ADC conversions.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsCalibrationControl in your application to determine whether this feature is available.
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Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_CalibrationEnable(MY_ADC_INSTANCE);
5.6.1.6.1.7 PLIB_ADC_CalibrationDisable Function
C
void PLIB_ADC_CalibrationDisable(
ADC_MODULE_ID index
);
Description
This function enables normal ADC module operation without any calibration.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsCalibrationControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_CalibrationDisable(MY_ADC_INSTANCE);
5.6.1.6.1.8 PLIB_ADC_InputSelectPositive Function
C
void PLIB_ADC_InputSelectPositive(
ADC_MODULE_ID index,
ADC_INPUTS_POSITIVE inputs
);
Description
This function selects the positive analog input channel for the ADC module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
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Remarks
Valid for ADC modules without MUX A, MUX B, etc.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsInputSelect in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_InputSelectPositive(MY_ADC_INSTANCE, ADC_INPUT_POSITIVE_AN2);
5.6.1.6.1.9 PLIB_ADC_InputSelectNegative Function
C
void PLIB_ADC_InputSelectNegative(
ADC_MODULE_ID index,
ADC_INPUTS_NEGATIVE negInput
);
Description
This function selects a negative channel for the ADC module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
negInput One of the possible values from ADC_INPUTS_NEGATIVE
Returns
None.
Remarks
Valid for ADC modules without MUX A, MUX B, etc.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsInputSelect in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_InputSelectNegative(MY_ADC_INSTANCE, ADC_INPUT_NEGATIVE_VREF_MINUS);
5.6.1.6.1.10 PLIB_ADC_InputScanMaskAdd Function
C
void PLIB_ADC_InputScanMaskAdd(
ADC_MODULE_ID index,
ADC_INPUTS_SCAN scanInputs
);
Description
This function selects the ADC analog channel for input scanning.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
scanInputs One of the possible values from ADC_INPUTS_SCAN. Inputs are added for
scanning.
Returns
None.
Remarks
Multiple channels can be added simultaneously by ORing.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsMuxInputScanSelect in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
// Single channel addition
PLIB_ADC_InputScanMaskAdd(MY_ADC_INSTANCE, ADC_INPUT_SCAN_AN2);
// Multiple channels addition
PLIB_ADC_InputScanMaskAdd(ADC_ID_1, ADC_INPUT_SCAN_AN2 | ADC_INPUT_SCAN_AN2);
5.6.1.6.1.11 PLIB_ADC_InputScanMaskRemove Function
C
void PLIB_ADC_InputScanMaskRemove(
ADC_MODULE_ID index,
ADC_INPUTS_SCAN scanInputs
);
Description
This function allows the ADC analog channel to be omitted from input scanning.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
scanInputs One of the possible values from ADC_INPUTS_SCAN. Inputs are removed from
scanning.
Returns
None.
Remarks
Multiple channels can be removed simultaneously by ORing.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsMuxInputScanSelect in your application to determine whether this feature is available.
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Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
// Single channel addition
PLIB_ADC_InputScanMaskRemove(MY_ADC_INSTANCE, ADC_INPUT_SCAN_AN2);
// Multiple channels addition
PLIB_ADC_InputScanMaskRemove(ADC_ID_1, ADC_INPUT_SCAN_AN2 | ADC_INPUT_SCAN_AN3);
5.6.1.6.1.12 PLIB_ADC_InternalReferenceChannelEnable Function
C
void PLIB_ADC_InternalReferenceChannelEnable(
ADC_MODULE_ID index,
ADC_REFERENCE_INPUT input
);
Description
This function enables the internal reference input.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Internal reference can be the band gap or core/regulator output voltage channels.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsInternalReferenceChannelControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_InternalReferenceChannelEnable(MY_ADC_INSTANCE,
ADC_REFERENCE_INPUT_VBG_DIV_BY_1);
5.6.1.6.1.13 PLIB_ADC_InternalReferenceChannelDisable Function
C
void PLIB_ADC_InternalReferenceChannelDisable(
ADC_MODULE_ID index,
ADC_REFERENCE_INPUT input
);
Description
This function disables the internal reference input.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Internal reference can be the band gap or core/regulator output voltage channels.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsInternalReferenceChannelControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_InternalReferenceChannelDisable(MY_ADC_INSTANCE,
ADC_REFERENCE_INPUT_VBG_DIV_BY_1);
5.6.1.6.1.14 PLIB_ADC_ChannelGroupSelect Function
C
void PLIB_ADC_ChannelGroupSelect(
ADC_MODULE_ID index,
ADC_CHANNEL_GROUP chlGroup
);
Description
This function selects the channels to be utilized by the ADC module.
Preconditions
Automatic sampling must be disabled.
Parameters
Parameters Description
index Identifier for the device instance to be configured
chlGroup One of the possible values from ADC_CHANNEL_GROUP
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsChannelGroup in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ChannelGroupSelect(MY_ADC_INSTANCE, ADC_CHANNEL_GROUP_CH0_CH1);
5.6.1.6.2 Sample and Hold Control Logic
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5.6.1.6.2.1 PLIB_ADC_SampleAcqusitionTimeSet Function
C
void PLIB_ADC_SampleAcqusitionTimeSet(
ADC_MODULE_ID index,
ADC_ACQUISITION_TIME acqTime
);
Description
This function sets the ADC acquisition/auto-sample time in TADs.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
acqTime Unsigned value of type ADC_ACQUISITION_TIME
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsSamplingAcquisitionTime in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_SampleAcqusitionTimeSet(MY_ADC_INSTANCE, 2);
5.6.1.6.2.2 PLIB_ADC_SampleAutoStartDisable Function
C
void PLIB_ADC_SampleAutoStartDisable(
ADC_MODULE_ID index
);
Description
This function disables auto-sampling and enables manual sampling.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsSamplingAutoStart in your application to determine whether this feature is available.
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Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_SampleAutoStartDisable(MY_ADC_INSTANCE);
5.6.1.6.2.3 PLIB_ADC_SampleAutoStartEnable Function
C
void PLIB_ADC_SampleAutoStartEnable(
ADC_MODULE_ID index
);
Description
This function enables auto-sampling. Sampling begins immediately after the last conversion is completed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsSamplingAutoStart in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_SampleAutoStartEnable(MY_ADC_INSTANCE);
5.6.1.6.2.4 PLIB_ADC_SampleMaxGet Function
C
ADC_SAMPLE PLIB_ADC_SampleMaxGet(
ADC_MODULE_ID index
);
Description
This function provides the maximum sample value based on the supported ADC resolution.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
ADC_SAMPLE - ADC Sample
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Remarks
Possible maximum value that can be obtained from the converted value.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsSampleResolution in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
ADC_SAMPLE maxSample = PLIB_ADC_SampleMaxGet(MY_ADC_INSTANCE);
5.6.1.6.2.5 PLIB_ADC_SampleMinGet Function
C
ADC_SAMPLE PLIB_ADC_SampleMinGet(
ADC_MODULE_ID index
);
Description
This function provides the minimum sample value based on the supported ADC resolution.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
ADC_SAMPLE - ADC sample
Remarks
Possible minimum value that can be obtained from the converted value.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsSampleResolution in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
ADC_SAMPLE maxSample = PLIB_ADC_SampleMinGet(MY_ADC_INSTANCE);
5.6.1.6.2.6 PLIB_ADC_SamplesPerInterruptSelect Function
C
void PLIB_ADC_SamplesPerInterruptSelect(
ADC_MODULE_ID index,
ADC_SAMPLES_PER_INTERRUPT value
);
Description
This function interrupts at the completion of conversion for each nth sample/convert sequence.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
value Possible values from ADC_SAMPLES_PER_INTERRUPT
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsSamplesPerInterruptSelect in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_SamplesPerInterruptSelect(MY_ADC_INSTANCE, ADC_16SAMPLES_PER_INTERRUPT);
5.6.1.6.2.7 PLIB_ADC_SamplingIsActive Function
C
bool PLIB_ADC_SamplingIsActive(
ADC_MODULE_ID index
);
Description
This function returns the ADC sampling status on whether the ADC is sampling or holding.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
bool - true = ADC S&H circuit is sampling
• false = ADC S&H circuit is holding
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsSamplingStatus in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
bool my_status = PLIB_ADC_SamplingIsActive(MY_ADC_INSTANCE);
5.6.1.6.2.8 PLIB_ADC_SamplingModeSelect Function
C
void PLIB_ADC_SamplingModeSelect(
ADC_MODULE_ID index,
ADC_SAMPLING_MODE mode
);
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Description
This function selects the sampling mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode One of the possible values from ADC_SAMPLING_MODE
Returns
None.
Remarks
Sampling mode could be alternate input or Simultaneous or Sequential mode. Alternate input can be combined with
Simultaneous or Sequential modes.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsSamplingModeControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_SamplingModeSelect(MY_ADC_INSTANCE, ADC_SAMPLING_MODE_ALTERNATE_INPUT);
5.6.1.6.2.9 PLIB_ADC_SamplingStart Function
C
void PLIB_ADC_SamplingStart(
ADC_MODULE_ID index
);
Description
This function starts the ADC Sample and Hold (S&H) circuit to sample the input channel.
Preconditions
Automatic sampling must be disabled.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsSamplingControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_SamplingStart(MY_ADC_INSTANCE);
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5.6.1.6.2.10 PLIB_ADC_SamplingStop Function
C
void PLIB_ADC_SamplingStop(
ADC_MODULE_ID index
);
Description
This function stops the ADC S&H circuit from sampling and holds the sampled data.
Preconditions
Automatic sampling must be disabled.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsSamplingControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_SamplingStop(MY_ADC_INSTANCE);
5.6.1.6.3 Conversion Control Logic
5.6.1.6.3.1 PLIB_ADC_ConversionStart Function
C
void PLIB_ADC_ConversionStart(
ADC_MODULE_ID index
);
Description
This function starts the ADC module manual conversion process.
Preconditions
Automatic sampling must be disabled.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_ADC_ExistsConversionControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ConversionStart(MY_ADC_INSTANCE);
5.6.1.6.3.2 PLIB_ADC_ConversionHasCompleted Function
C
bool PLIB_ADC_ConversionHasCompleted(
ADC_MODULE_ID index
);
Description
This function provides the completion status of analog-to-digital conversion.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
bool - true = ADC conversion is done/completed
• false = ADC conversion is in progress or has not started
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsConversionStatus in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
bool my_status = PLIB_ADC_ConversionHasCompleted(MY_ADC_INSTANCE);
5.6.1.6.3.3 PLIB_ADC_ConversionTriggerSourceSelect Function
C
void PLIB_ADC_ConversionTriggerSourceSelect(
ADC_MODULE_ID index,
ADC_CONVERSION_TRIGGER_SOURCE source
);
Description
This function selects the ADC module conversion trigger source.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
source One of the possible values from ADC_CONVERSION_TRIGGER_SOURCE
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsConversionTriggerSource in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ConversionTriggerSourceSelect(MY_ADC_INSTANCE, ADC_CONVERSION_TRIGGER_INTERNAL_COUNT);
5.6.1.6.3.4 PLIB_ADC_ConversionStopSequenceEnable Function
C
void PLIB_ADC_ConversionStopSequenceEnable(
ADC_MODULE_ID index
);
Description
This function stops conversions when the first ADC module interrupt is generated. Hardware clears the Automatic Sampling bit
when the ADC interrupt is generated.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsConversionStopSequenceControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ConversionStopSequenceEnable(MY_ADC_INSTANCE);
5.6.1.6.3.5 PLIB_ADC_ConversionStopSequenceDisable Function
C
void PLIB_ADC_ConversionStopSequenceDisable(
ADC_MODULE_ID index
);
Description
This function enables normal operation, wherein the buffer contents will be overwritten by the next conversion sequence.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsConversionStopSequenceControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ConversionStopSequenceDisable(MY_ADC_INSTANCE);
5.6.1.6.3.6 PLIB_ADC_ConversionClockSet Function
C
void PLIB_ADC_ConversionClockSet(
ADC_MODULE_ID index,
uint32_t baseFrequency,
ADC_CONVERSION_CLOCK value
);
Description
This function sets the ADC module conversion clock prescaler.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
value Unsigned value of type ADC_CONVERSION_CLOCK
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsConversionClock in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ConversionClockSet(MY_ADC_INSTANCE, 80000000, 320000000);
5.6.1.6.3.7 PLIB_ADC_ConversionClockGet Function
C
ADC_CONVERSION_CLOCK PLIB_ADC_ConversionClockGet(
ADC_MODULE_ID index,
uint32_t baseFrequency
);
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Description
This function obtains the conversion clock that is being used by the ADC module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
baseFrequencyHz Input clock frequency to the ADC module in Hz
Returns
uint32_t - Conversion clock value
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsConversionClock in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
// baseFrequency is the peripheral input frequency
ADC_CONVERSION_CLOCK conversionClock; // To store the conversion clock value
conversionClock = PLIB_ADC_ConversionClockGet(MY_ADC_INSTANCE, 8000000);
5.6.1.6.3.8 PLIB_ADC_ConversionClockSourceSelect Function
C
void PLIB_ADC_ConversionClockSourceSelect(
ADC_MODULE_ID index,
ADC_CLOCK_SOURCE source
);
Description
This function selects the ADC module conversion clock source.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
source One of the possible values from ADC_CLOCK_SOURCE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsConversionClockSource in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ConversionClockSourceSelect(MY_ADC_INSTANCE, ADC_CLOCK_SOURCE_SYSTEM_CLOCK);
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5.6.1.6.3.9 PLIB_ADC_ConversionTriggerGroupSelect Function
C
void PLIB_ADC_ConversionTriggerGroupSelect(
ADC_MODULE_ID index,
ADC_CONVERSION_TRIGGER_GROUP group
);
Description
This function selects the ADC module conversion trigger source group.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
group One of the possible values from ADC_CONVERSION_TRIGGER_GROUP
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsConversionTriggerGroup in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ConversionTriggerGroupSelect(MY_ADC_INSTANCE, ADC_CONVERSION_TRIGGER_GROUP_SEL);
5.6.1.6.3.10 PLIB_ADC_ConversionOrderSelect Function
C
void PLIB_ADC_ConversionOrderSelect(
ADC_MODULE_ID index,
ADC_CONVERSION_ORDER order
);
Description
This function selects the conversion order of the analog input.
Preconditions
The ADC module must be disabled.
Parameters
Parameters Description
index Identifier for the device instance to be configured
order One of the possible values from ADC_CONVERSION_ORDER
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_ADC_ExistsConversionOrder in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ConversionOrderSelect(MY_ADC_INSTANCE, ADC_CONVERSION_ORDER_ODD_FIRST);
5.6.1.6.4 DMA Transactions
5.6.1.6.4.1 PLIB_ADC_DMAAddressIncrementSelect Function
C
void PLIB_ADC_DMAAddressIncrementSelect(
ADC_MODULE_ID index,
ADC_DMA_ADDRESS_INCREMENT incRate
);
Description
This function selects the increment rate of the DMA address after completion of incRate number of sample/conversion
operations. This gives information on how often the DMA RAM buffer pointer is incremented.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
incRate One of the possible values from ADC_DMA_ADDRESS_INCREMENT
Returns
None.
Remarks
These represent the same set of bits as does the samples per interrupt selection.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsDMAAddressIncrement in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_DMAAddressIncrementSelect(MY_ADC_INSTANCE, ADC_DMA_ADDRESS_INCREMENT_EVERY_SAMPLE);
5.6.1.6.4.2 PLIB_ADC_DMABufferModeSelect Function
C
void PLIB_ADC_DMABufferModeSelect(
ADC_MODULE_ID index,
ADC_DMA_BUFFER_MODE bufferMode
);
Description
This function selects the DMA Buffer Build mode regardless of the DMA buffers being written in the order of conversion or in
scatter/gather mode.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
bufferMode One of the possible values from ADC_DMA_BUFFER_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsDMABufferMode in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_DMABufferModeSelect(MY_ADC_INSTANCE, ADC_DMA_BUFFER_MODE_ORDER_OF_CONV);
5.6.1.6.4.3 PLIB_ADC_DMADisable Function
C
void PLIB_ADC_DMADisable(
ADC_MODULE_ID index
);
Description
This function disables the ADC Direct Memory Access (DMA).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Conversion results are stored in multiple buffers and the DMA will not be used.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsDMAControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_DMADisable(MY_ADC_INSTANCE);
5.6.1.6.4.4 PLIB_ADC_DMAEnable Function
C
void PLIB_ADC_DMAEnable(
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ADC_MODULE_ID index
);
Description
This function enables the ADC Direct Memory Access (DMA).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Conversion results are stored in a single register and are transfered to RAM using DMA.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsDMAControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_DMAEnable(MY_ADC_INSTANCE);
5.6.1.6.4.5 PLIB_ADC_DMAInputBufferSelect Function
C
void PLIB_ADC_DMAInputBufferSelect(
ADC_MODULE_ID index,
ADC_DMA_INPUT_BUFFER buffer
);
Description
This function selects the number of DMA buffer locations per analog input and specifies the number of samples that need to be
stored in the DMA buffer for each analog input.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
buffer One of the possible values from ADC_DMA_INPUT_BUFFER
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsDMABuffersPerAnalogInput in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
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// application developer.
PLIB_ADC_DMAInputBufferSelect(MY_ADC_INSTANCE, ADC_DMA_INPUT_BUFFER_1WORD);
5.6.1.6.5 Channel Pairs Control
5.6.1.6.5.1 PLIB_ADC_PairConversionIsPending Function
C
bool PLIB_ADC_PairConversionIsPending(
ADC_MODULE_ID index,
ADC_PAIR pairNum
);
Description
This function provides information on whether the conversion is pending or complete for the ADC pair.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pairNum One of the possible values from ADC_PAIR
Returns
bool - true = Conversion of a pair of channels is pending. Set when selected trigger is asserted
• false = Conversion is complete
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsPairConversionControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
bool my_status = PLIB_ADC_PairConversionIsPending(MY_ADC_INSTANCE,
ADC_PAIR_AN0_AN1);
5.6.1.6.5.2 PLIB_ADC_PairConversionStart Function
C
void PLIB_ADC_PairConversionStart(
ADC_MODULE_ID index,
ADC_PAIR pairNum
);
Description
This function starts conversion of the requested ADC pair.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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pairNum One of the possible values from ADC_PAIR
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsPairConversionControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_PairConversionStart(MY_ADC_INSTANCE, ADC_PAIR_AN0_AN1);
5.6.1.6.5.3 PLIB_ADC_PairInterruptAfterFirstConversion Function
C
void PLIB_ADC_PairInterruptAfterFirstConversion(
ADC_MODULE_ID index
);
Description
This function generates an interrupt after the first conversion is completed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsPairInterruptOnConversion in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_PairInterruptAfterFirstConversion(MY_ADC_INSTANCE);
5.6.1.6.5.4 PLIB_ADC_PairInterruptAfterSecondConversion Function
C
void PLIB_ADC_PairInterruptAfterSecondConversion(
ADC_MODULE_ID index
);
Description
This function generates an interrupt after the second conversion is completed.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsPairInterruptOnConversion in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_PairInterruptAfterSecondConversion(MY_ADC_INSTANCE);
5.6.1.6.5.5 PLIB_ADC_PairInterruptRequestDisable Function
C
void PLIB_ADC_PairInterruptRequestDisable(
ADC_MODULE_ID index,
ADC_PAIR pairNum
);
Description
This function disables IRQ generation for the requested ADC pair.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pairNum One of the possible values from ADC_PAIR
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsPairInterruptRequest in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_PairInterruptRequestDisable(MY_ADC_INSTANCE, ADC_PAIR_AN0_AN1);
5.6.1.6.5.6 PLIB_ADC_PairInterruptRequestEnable Function
C
void PLIB_ADC_PairInterruptRequestEnable(
ADC_MODULE_ID index,
ADC_PAIR pairNum
);
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Description
This function enables IRQ generation, when requested conversion of channels associated with the pair is completed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pairNum one of the possible values from ADC_PAIR
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsPairInterruptRequest in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_PairInterruptRequestEnable(MY_ADC_INSTANCE, ADC_PAIR_AN0_AN1);
5.6.1.6.5.7 PLIB_ADC_PairSampleIsAvailable Function
C
bool PLIB_ADC_PairSampleIsAvailable(
ADC_MODULE_ID index,
ADC_PAIR pairNum
);
Description
This function provides information on whether the samples for the ADC pair selected are available in the buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pairNum One of the possible values from ADC_PAIR
Returns
bool - true = Data is ready in buffer
• false = Data is not ready
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsPairSampleStatus in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
bool my_status;
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my_status = PLIB_ADC_PairSampleIsAvailable(MY_ADC_INSTANCE, ADC_PAIR_AN0_AN1);
5.6.1.6.5.8 PLIB_ADC_PairSampleStatusClear Function
C
void PLIB_ADC_PairSampleStatusClear(
ADC_MODULE_ID index,
ADC_PAIR pairNum
);
Description
This function clears a pair conversion ready status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pairNum One of the possible values from ADC_PAIR
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsPairSampleStatus in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_PairSampleStatusClear(MY_ADC_INSTANCE, ADC_PAIR_AN0_AN1);
5.6.1.6.5.9 PLIB_ADC_PairTriggerSourceSelect Function
C
void PLIB_ADC_PairTriggerSourceSelect(
ADC_MODULE_ID index,
ADC_PAIR pairNum,
ADC_CONVERSION_TRIGGER_SOURCE trigSrc
);
Description
This function selects the trigger source for the requested ADC pair.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pairNum One of the possible values from ADC_PAIR
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsPairTriggerSource in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_PairTriggerSourceSelect(MY_ADC_INSTANCE, ADC_PAIR_AN0_AN1,
ADC_CONVERSION_TRIGGER_TMR3_COMPARE_MATCH);
5.6.1.6.6 Output Configuration
5.6.1.6.6.1 PLIB_ADC_ResultBufferModeSelect Function
C
void PLIB_ADC_ResultBufferModeSelect(
ADC_MODULE_ID index,
ADC_BUFFER_MODE mode
);
Description
This function selects the result buffer mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode One of the possible values from ADC_BUFFER_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsResultBufferMode in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ResultBufferModeSelect(MY_ADC_INSTANCE,
ADC_BUFFER_MODE_TWO_8WORD_BUFFERS);
5.6.1.6.6.2 PLIB_ADC_ResultBufferStatusGet Function
C
ADC_RESULT_BUF_STATUS PLIB_ADC_ResultBufferStatusGet(
ADC_MODULE_ID index
);
Description
This function obtains the buffer fill status.
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Preconditions
ADC multi-buffer support is available and configured.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
bool - true = ADC is currently filling buffer 08-0F, user should access data in 00-07
• false = ADC is currently filling buffer 00-07, user should access data in 08-0F
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsResultBufferFillStatus in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
ADC_RESULT_BUF_STATUS my_status;
my_status = PLIB_ADC_ResultBufferStatusGet(MY_ADC_INSTANCE);
5.6.1.6.6.3 PLIB_ADC_ResultFormatSelect Function
C
void PLIB_ADC_ResultFormatSelect(
ADC_MODULE_ID index,
ADC_RESULT_FORMAT resultFormat
);
Description
This function selects the result format.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
resultFormat One of the possible values from ADC_RESULT_FORMAT
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsResultFormat in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ResultFormatSelect(MY_ADC_INSTANCE, ADC_RESULT_FORMAT_INTEGER_16BIT);
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5.6.1.6.6.4 PLIB_ADC_ResultGet Function
C
ADC_SAMPLE PLIB_ADC_ResultGet(
ADC_MODULE_ID index
);
Description
This function obtains the ADC sample/result value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
ADC_SAMPLE - Right-/Left-justified ADC result
Remarks
Only applicable for 10-bit or 12-bit ADC outputs.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsResultGet in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
ADC_SAMPLE my_res;
my_res = PLIB_ADC_ResultGet(MY_ADC_INSTANCE);
5.6.1.6.6.5 PLIB_ADC_ResultGetByIndex Function
C
ADC_SAMPLE PLIB_ADC_ResultGetByIndex(
ADC_MODULE_ID index,
uint8_t bufferIndex
);
Description
This function provides the ADC module conversion result based on the buffer index.
Preconditions
ADC multi-buffer support available and configured.
Parameters
Parameters Description
index Identifier for the device instance to be configured
bufferIndex Value ranging from 0 to 15
Returns
int16_t - ADC Conversion result at the respective bufferIndex
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsResultGetByIndex in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
ADC_SAMPLE my_res = PLIB_ADC_ResultGetByIndex(MY_ADC_INSTANCE, 15);
5.6.1.6.6.6 PLIB_ADC_ResultSignGet Function
C
bool PLIB_ADC_ResultSignGet(
ADC_MODULE_ID index
);
Description
This function obtains the ADC result sign status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
bool - true = ADC result is negative
• false = ADC result is positive
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsResultSign in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
bool my_sign = PLIB_ADC_ResultSignGet(MY_ADC_INSTANCE);
5.6.1.6.6.7 PLIB_ADC_ResultSizeSelect Function
C
void PLIB_ADC_ResultSizeSelect(
ADC_MODULE_ID index,
ADC_RESULT_SIZE resSize
);
Description
This function selects the ADC module mode/result size.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
resSize One of the possible values from ADC_RESULT_SIZE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsResultSize in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_ResultSizeSelect(MY_ADC_INSTANCE, ADC_RESULT_SIZE_10_BITS);
5.6.1.6.7 Miscellaneous
5.6.1.6.7.1 PLIB_ADC_AsynchronousDedicatedSamplingDisable Function
C
void PLIB_ADC_AsynchronousDedicatedSamplingDisable(
ADC_MODULE_ID index
);
Description
This function disables constant sampling, and starts sampling when the trigger event is detected and completes the sampling
process in two ADC clock cycles.
Preconditions
The ADC module must be disabled.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsAsynchronousDedicatedSampling in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_AsynchronousDedicatedSamplingDisable(MY_ADC_INSTANCE);
5.6.1.6.7.2 PLIB_ADC_AsynchronousDedicatedSamplingEnable Function
C
void PLIB_ADC_AsynchronousDedicatedSamplingEnable(
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ADC_MODULE_ID index
);
Description
This function enables constant sampling of the dedicated S&H, and then terminates sampling as soon as the trigger pulse is
detected.
Preconditions
The ADC module must be disabled.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsAsynchronousDedicatedSampling in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_AsynchronousDedicatedSamplingEnable(MY_ADC_INSTANCE);
5.6.1.6.7.3 PLIB_ADC_GlobalSoftwareTriggerSet Function
C
void PLIB_ADC_GlobalSoftwareTriggerSet(
ADC_MODULE_ID index
);
Description
This function enables/sets the global software trigger. It will trigger conversions based on the trigger sources selected.
Preconditions
Global software trigger has to be cleared before setting back.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature/bit is automatically cleared by hardware.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsGlobalSoftwareTrigger in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_GlobalSoftwareTriggerSet(MY_ADC_INSTANCE);
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5.6.1.6.7.4 PLIB_ADC_IsrJumpTableBaseAddressGet Function
C
int PLIB_ADC_IsrJumpTableBaseAddressGet(
ADC_MODULE_ID index
);
Description
This function gets the base address of the user's ADC Interrupt Service Routine (ISR) jump table.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
baseAddr - Upper 15 bits of the user's ADC ISR jump table address (bit 0 is a don't care)
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsISRJumpTableBaseAddress in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
unsigned int add;
add = PLIB_ADC_IsrJumpTableBaseAddressGet(MY_ADC_INSTANCE);
5.6.1.6.7.5 PLIB_ADC_IsrJumpTableBaseAddressSet Function
C
void PLIB_ADC_IsrJumpTableBaseAddressSet(
ADC_MODULE_ID index,
int baseAddr
);
Description
This function sets the base address of the user's ADC Interrupt Service Routine (ISR) jump table.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
baseAddr Upper 15 bits of the user's ADC ISR jump table address (bit 0 is a don't care)
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsISRJumpTableBaseAddress in your application to determine whether this feature is available.
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Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_IsrJumpTableBaseAddressSet(MY_ADC_INSTANCE, 0x1000);
5.6.1.6.8 Data Types & Constants
5.6.1.6.8.1 ADC_MODULE_ID Enumeration
C
typedef enum {
ADC_ID_1,
ADC_ID_2,
ADC_ID_3,
ADC_ID_4,
ADC_ID_5,
ADC_NUMBER_OF_MODULES
} ADC_MODULE_ID;
Description
ADC Module ID
This enumeration identifies the available ADC modules.
Members
Members Description
ADC_ID_1 ADC Module 1 ID
ADC_ID_2 ADC Module 2 ID
ADC_ID_3 ADC Module 3 ID
ADC_ID_4 ADC Module 4 ID
ADC_ID_5 ADC Module 5 ID
ADC_NUMBER_OF_MODULES Number of available ADC modules.
Remarks
The caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to
the next.
Not all modules are available on all devices. Refer to the specific data sheet to determine which modules are supported. The
numbers used in the enumeration values will match the numbers provided in the data sheet.
5.6.1.6.8.2 ADC_VOLTAGE_REFERENCE Enumeration
C
typedef enum {
ADC_VREF_POS_TO_VDD,
ADC_VREF_POS_TO_VREF_PLUS,
ADC_VREF_NEG_TO_VSS,
ADC_VREF_NEG_TO_VREF_MINUS,
ADC_REFERENCE_VDD_TO_AVSS,
ADC_REFERENCE_VREFPLUS_TO_AVSS,
ADC_REFERENCE_AVDD_TO_VREF_NEG,
ADC_REFERENCE_VREFPLUS_TO_VREFNEG
} ADC_VOLTAGE_REFERENCE;
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Description
ADC Voltage Reference Enumeration
This data type defines the different ADC Voltage Reference by which the ADC can be configured.
Members
Members Description
ADC_VREF_POS_TO_VDD Positive voltage reference supplied internally by VDD
ADC_VREF_POS_TO_VREF_PLUS Positive voltage reference supplied externally through VREF+ pin
ADC_VREF_NEG_TO_VSS Negative voltage reference supplied internally through VSS
ADC_VREF_NEG_TO_VREF_MINUS Negative voltage reference supplied externally through VREF- pin
ADC_REFERENCE_VDD_TO_AVSS Positive voltage reference supplied internally by VDD and Negative voltage
reference supplied internally through VSS
ADC_REFERENCE_VREFPLUS_TO_AVSS Positive voltage reference supplied externally through VREF+ pin and
Negative voltage reference supplied internally through VSS
ADC_REFERENCE_AVDD_TO_VREF_NEG Positive voltage reference supplied internally by VDD and Negative voltage
reference supplied externally through VREF- pin
ADC_REFERENCE_VREFPLUS_TO_VREFNEG Positive voltage reference supplied externally through VREF+ pin and
Negative voltage reference supplied externally through VREF- pin
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.3 ADC_INPUTS_NEGATIVE Enumeration
C
typedef enum {
ADC_INPUT_NEGATIVE_VREF_MINUS,
ADC_INPUT_NEGATIVE_AN1,
ADC_INPUT_NEGATIVE_AN2,
ADC_INPUT_NEGATIVE_AN3,
ADC_INPUT_NEGATIVE_AN4,
ADC_INPUT_NEGATIVE_AN5,
ADC_INPUT_NEGATIVE_AN6
} ADC_INPUTS_NEGATIVE;
Description
ADC Negative Input Enumeration
This data type defines the different ADC Negative Input Enumeration.
Members
Members Description
ADC_INPUT_NEGATIVE_VREF_MINUS Negative input is Vref
ADC_INPUT_NEGATIVE_AN1 Negative input is AN1
ADC_INPUT_NEGATIVE_AN2 Negative input is AN2
ADC_INPUT_NEGATIVE_AN3 Negative input is AN3
ADC_INPUT_NEGATIVE_AN4 Negative input is AN4
ADC_INPUT_NEGATIVE_AN5 Negative input is AN5
ADC_INPUT_NEGATIVE_AN6 Negative input is AN6
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
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5.6.1.6.8.4 ADC_SAMPLES_PER_INTERRUPT Enumeration
C
typedef enum {
ADC_1SAMPLE_PER_INTERRUPT,
ADC_2SAMPLES_PER_INTERRUPT,
ADC_3SAMPLES_PER_INTERRUPT,
ADC_4SAMPLES_PER_INTERRUPT,
ADC_5SAMPLES_PER_INTERRUPT,
ADC_6SAMPLES_PER_INTERRUPT,
ADC_7SAMPLES_PER_INTERRUPT,
ADC_8SAMPLES_PER_INTERRUPT,
ADC_9SAMPLES_PER_INTERRUPT,
ADC_10SAMPLES_PER_INTERRUPT,
ADC_11SAMPLES_PER_INTERRUPT,
ADC_12SAMPLES_PER_INTERRUPT,
ADC_13SAMPLES_PER_INTERRUPT,
ADC_14SAMPLES_PER_INTERRUPT,
ADC_15SAMPLES_PER_INTERRUPT,
ADC_16SAMPLES_PER_INTERRUPT,
ADC_17SAMPLES_PER_INTERRUPT,
ADC_18SAMPLES_PER_INTERRUPT,
ADC_19SAMPLES_PER_INTERRUPT,
ADC_20SAMPLES_PER_INTERRUPT,
ADC_21SAMPLES_PER_INTERRUPT,
ADC_22SAMPLES_PER_INTERRUPT,
ADC_23SAMPLES_PER_INTERRUPT,
ADC_24SAMPLES_PER_INTERRUPT,
ADC_25SAMPLES_PER_INTERRUPT,
ADC_26SAMPLES_PER_INTERRUPT,
ADC_27SAMPLES_PER_INTERRUPT,
ADC_28SAMPLES_PER_INTERRUPT,
ADC_29SAMPLES_PER_INTERRUPT,
ADC_30SAMPLES_PER_INTERRUPT,
ADC_31SAMPLES_PER_INTERRUPT,
ADC_32SAMPLES_PER_INTERRUPT
} ADC_SAMPLES_PER_INTERRUPT;
Description
ADC samples per Interrupt Enumeration
This data type defines the Samples Per Interrupt Enumeration.
Members
Members Description
ADC_1SAMPLE_PER_INTERRUPT Interrupts at the completion of conversion for each sample/convert sequence
ADC_2SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 2nd sample/convert sequence
ADC_3SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 3rd sample/convert sequence
ADC_4SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 4th sample/convert sequence
ADC_5SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 5th sample/convert sequence
ADC_6SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 6th sample/convert sequence
ADC_7SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 7th sample/convert sequence
ADC_8SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 8th sample/convert sequence
ADC_9SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 9th sample/convert sequence
ADC_10SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 10th sample/convert sequence
ADC_11SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 11th sample/convert sequence
ADC_12SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 12th sample/convert sequence
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ADC_13SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 13th sample/convert sequence
ADC_14SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 14th sample/convert sequence
ADC_15SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 15th sample/convert sequence
ADC_16SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 16th sample/convert sequence
ADC_17SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 17th sample/convert sequence
ADC_18SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 18th sample/convert sequence
ADC_19SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 19th sample/convert sequence
ADC_20SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 20th sample/convert sequence
ADC_21SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 21st sample/convert sequence
ADC_22SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 22nd sample/convert sequence
ADC_23SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 23rd sample/convert sequence
ADC_24SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 24th sample/convert sequence
ADC_25SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 25th sample/convert sequence
ADC_26SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 26th sample/convert sequence
ADC_27SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 27th sample/convert sequence
ADC_28SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 28th sample/convert sequence
ADC_29SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 29th sample/convert sequence
ADC_30SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 30th sample/convert sequence
ADC_31SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 31st sample/convert sequence
ADC_32SAMPLES_PER_INTERRUPT Interrupts at the completion of conversion for each 32nd sample/convert sequence
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.5 ADC_CHANNEL_GROUP Enumeration
C
typedef enum {
ADC_CHANNEL_GROUP_CH0_CH1_CH2_CH3,
ADC_CHANNEL_GROUP_CH0_CH1,
ADC_CHANNEL_GROUP_CH0
} ADC_CHANNEL_GROUP;
Description
ADC Channel Group
This data type defines the ADC Channel Group.
Members
Members Description
ADC_CHANNEL_GROUP_CH0_CH1_CH2_CH3 Converts Channels CH0, CH1, CH2 and CH3
ADC_CHANNEL_GROUP_CH0_CH1 Converts Channels CH0, CH1
ADC_CHANNEL_GROUP_CH0 Converts Channel CH0
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
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5.6.1.6.8.6 ADC_CLOCK_SOURCE Enumeration
C
typedef enum {
ADC_CLOCK_SOURCE_SYSTEM_CLOCK,
ADC_CLOCK_SOURCE_INTERNAL_RC,
ADC_CLOCK_SOURCE_AUXILIARY_PLL,
ADC_CLOCK_SOURCE_PRIMARY_PLL
} ADC_CLOCK_SOURCE;
Description
ADC Clock Source Select
This data type defines the ADC Clock Source Select.
Members
Members Description
ADC_CLOCK_SOURCE_SYSTEM_CLOCK A/D system clock
ADC_CLOCK_SOURCE_INTERNAL_RC A/D internal RC clock
ADC_CLOCK_SOURCE_AUXILIARY_PLL ADC is clocked by the auxiliary PLL (ACLK)
ADC_CLOCK_SOURCE_PRIMARY_PLL ADC is clock by the primary PLL (FVCO)
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.7 ADC_CONVERSION_TRIGGER_SOURCE Enumeration
C
typedef enum {
ADC_CONVERSION_TRIGGER_SAMP_CLEAR,
ADC_CONVERSION_TRIGGER_INT0_TRANSITION,
ADC_CONVERSION_TRIGGER_TMR3_COMPARE_MATCH,
ADC_CONVERSION_TRIGGER_TMR5_COMPARE_MATCH,
ADC_CONVERSION_TRIGGER_CTMU_EVENT,
ADC_CONVERSION_TRIGGER_CTMU_EVENT_ALTERNATIVE,
ADC_CONVERSION_TRIGGER_INTERNAL_COUNT,
ADC_CONVERSION_TRIGGER_NO_CONVERSION,
ADC_CONVERSION_TRIGGER_INDIVIDUAL_SFW_TRIG,
ADC_CONVERSION_TRIGGER_GLOBAL_SFW_TRIG,
ADC_CONVERSION_TRIGGER_PWM_PRIMARY_SPECIAL_EVENT,
ADC_CONVERSION_TRIGGER_PWM_GEN1_PRIMARY,
ADC_CONVERSION_TRIGGER_PWM_GEN2_PRIMARY,
ADC_CONVERSION_TRIGGER_PWM_GEN3_PRIMARY,
ADC_CONVERSION_TRIGGER_PWM_GEN4_PRIMARY,
ADC_CONVERSION_TRIGGER_PWM_GEN5_PRIMARY,
ADC_CONVERSION_TRIGGER_PWM_GEN6_PRIMARY,
ADC_CONVERSION_TRIGGER_PWM_GEN7_PRIMARY,
ADC_CONVERSION_TRIGGER_PWM_GEN8_PRIMARY,
ADC_CONVERSION_TRIGGER_TMR1_PERIOD_MATCH,
ADC_CONVERSION_TRIGGER_PWM_SECONDARY_SPECIAL_EVENT,
ADC_CONVERSION_TRIGGER_PWM_GEN1_SECONDARY,
ADC_CONVERSION_TRIGGER_PWM_GEN2_SECONDARY,
ADC_CONVERSION_TRIGGER_PWM_GEN3_SECONDARY,
ADC_CONVERSION_TRIGGER_PWM_GEN4_SECONDARY,
ADC_CONVERSION_TRIGGER_PWM_GEN5_SECONDARY,
ADC_CONVERSION_TRIGGER_PWM_GEN6_SECONDARY,
ADC_CONVERSION_TRIGGER_PWM_GEN7_SECONDARY,
ADC_CONVERSION_TRIGGER_PWM_GEN8_SECONDARY,
ADC_CONVERSION_TRIGGER_PWM_GEN9_SECONDARY,
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ADC_CONVERSION_TRIGGER_PWM_GEN1_CURRENT_LMT_ADC,
ADC_CONVERSION_TRIGGER_PWM_GEN2_CURRENT_LMT_ADC,
ADC_CONVERSION_TRIGGER_PWM_GEN3_CURRENT_LMT_ADC,
ADC_CONVERSION_TRIGGER_PWM_GEN4_CURRENT_LMT_ADC,
ADC_CONVERSION_TRIGGER_PWM_GEN5_CURRENT_LMT_ADC,
ADC_CONVERSION_TRIGGER_PWM_GEN6_CURRENT_LMT_ADC,
ADC_CONVERSION_TRIGGER_PWM_GEN7_CURRENT_LMT_ADC,
ADC_CONVERSION_TRIGGER_PWM_GEN8_CURRENT_LMT_ADC,
ADC_CONVERSION_TRIGGER_TMR2_PERIOD_MATCH
} ADC_CONVERSION_TRIGGER_SOURCE;
Description
ADC Conversion Trigger Source
This data type defines the ADC Conversion Trigger Source.
Members
Members Description
ADC_CONVERSION_TRIGGER_SAMP_CLEAR Clearing SAMP bit (full program control)
ADC_CONVERSION_TRIGGER_INT0_TRANSITION Active transition on INT0 pin (basic sync convert)
ADC_CONVERSION_TRIGGER_TMR3_COMPARE_MATCH Timer3 compare match
ADC_CONVERSION_TRIGGER_TMR5_COMPARE_MATCH Timer5 compare match
ADC_CONVERSION_TRIGGER_CTMU_EVENT CTMU event
ADC_CONVERSION_TRIGGER_CTMU_EVENT_ALTERNATIVE CTMU event Alternative
ADC_CONVERSION_TRIGGER_INTERNAL_COUNT Internal counter (auto-convert)
ADC_CONVERSION_TRIGGER_NO_CONVERSION No conversion enabled
ADC_CONVERSION_TRIGGER_INDIVIDUAL_SFW_TRIG Individual software trigger selected
ADC_CONVERSION_TRIGGER_GLOBAL_SFW_TRIG Global software trigger selected
ADC_CONVERSION_TRIGGER_PWM_PRIMARY_SPECIAL_EVENT PWM Special/Primary Special Event Trigger
selected
ADC_CONVERSION_TRIGGER_PWM_GEN1_PRIMARY PWM Generator 1 primary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN2_PRIMARY PWM Generator 2 primary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN3_PRIMARY PWM Generator 3 primary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN4_PRIMARY PWM Generator 4 primary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN5_PRIMARY PWM Generator 5 primary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN6_PRIMARY PWM Generator 6 primary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN7_PRIMARY PWM Generator 7 primary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN8_PRIMARY PWM Generator 8 primary trigger selected
ADC_CONVERSION_TRIGGER_TMR1_PERIOD_MATCH Timer1 period match
ADC_CONVERSION_TRIGGER_PWM_SECONDARY_SPECIAL_EVENT PWM secondary special event trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN1_SECONDARY PWM Generator 1 secondary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN2_SECONDARY PWM Generator 2 secondary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN3_SECONDARY PWM Generator 3 secondary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN4_SECONDARY PWM Generator 4 secondary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN5_SECONDARY PWM Generator 5 secondary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN6_SECONDARY PWM Generator 6 secondary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN7_SECONDARY PWM Generator 7 secondary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN8_SECONDARY PWM Generator 8 secondary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN9_SECONDARY PWM Generator 9 secondary trigger selected
ADC_CONVERSION_TRIGGER_PWM_GEN1_CURRENT_LMT_ADC PWM Generator 1 current-limit ADC trigger
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ADC_CONVERSION_TRIGGER_PWM_GEN2_CURRENT_LMT_ADC PWM Generator 2 current-limit ADC trigger
ADC_CONVERSION_TRIGGER_PWM_GEN3_CURRENT_LMT_ADC PWM Generator 3 current-limit ADC trigger
ADC_CONVERSION_TRIGGER_PWM_GEN4_CURRENT_LMT_ADC PWM Generator 4 current-limit ADC trigger
ADC_CONVERSION_TRIGGER_PWM_GEN5_CURRENT_LMT_ADC PWM Generator 5 current-limit ADC trigger
ADC_CONVERSION_TRIGGER_PWM_GEN6_CURRENT_LMT_ADC PWM Generator 6 current-limit ADC trigger
ADC_CONVERSION_TRIGGER_PWM_GEN7_CURRENT_LMT_ADC PWM Generator 7 current-limit ADC trigger
ADC_CONVERSION_TRIGGER_PWM_GEN8_CURRENT_LMT_ADC PWM Generator 8 current-limit ADC trigger
ADC_CONVERSION_TRIGGER_TMR2_PERIOD_MATCH Timer2 period match
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.8 ADC_RESULT_SIZE Enumeration
C
typedef enum {
ADC_RESULT_SIZE_8_BITS,
ADC_RESULT_SIZE_10_BITS,
ADC_RESULT_SIZE_12_BITS
} ADC_RESULT_SIZE;
Description
ADC Result Size
This data type defines the ADC Result Size.
Members
Members Description
ADC_RESULT_SIZE_8_BITS Converter Mode/Result Size is 8-bits
ADC_RESULT_SIZE_10_BITS Converter Mode/Result Size is 10-bits
ADC_RESULT_SIZE_12_BITS Converter Mode/Result Size is 12-bits
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.9 ADC_BUFFER_MODE Enumeration
C
typedef enum {
ADC_BUFFER_MODE_ONE_16WORD_BUFFER,
ADC_BUFFER_MODE_TWO_8WORD_BUFFERS
} ADC_BUFFER_MODE;
Description
ADC Buffer Mode
This data type defines the ADC Buffer Mode.
Members
Members Description
ADC_BUFFER_MODE_ONE_16WORD_BUFFER Buffer configured as one 16-word buffer (ADC1BUF0 to ADC1BUFF)
ADC_BUFFER_MODE_TWO_8WORD_BUFFERS Buffer configured as two 8-word buffers (ADC1BUF0 to ADC1BUF7 and
ADC1BUF8 to ADC1BUFF)
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Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.10 ADC_RESULT_BUF_STATUS Enumeration
C
typedef enum {
ADC_FILLING_BUF_0TO7,
ADC_FILLING_BUF_8TOF
} ADC_RESULT_BUF_STATUS;
Description
ADC Result Buffer Status
This data type defines the elements that specify which group of eight buffers the ADC is currently filling.
Members
Members Description
ADC_FILLING_BUF_0TO7 Buffers 0x0 to 0x7 are getting filled
ADC_FILLING_BUF_8TOF Buffers 0x8 to 0xF are getting filled
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.11 ADC_MUX Enumeration
C
typedef enum {
ADC_MUX_A,
ADC_MUX_B
} ADC_MUX;
Description
ADC MUX Enumeration
This data type defines the different ADC MUX Enumeration.
Members
Members Description
ADC_MUX_A ADC Mux A Selection
ADC_MUX_B ADC Mux B Selection
Remarks
None
5.6.1.6.8.12 ADC_SAMPLING_MODE Enumeration
C
typedef enum {
ADC_SAMPLING_MODE_SIMULTANEOUS,
ADC_SAMPLING_MODE_SEQUENTIAL
} ADC_SAMPLING_MODE;
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Description
ADC Sampling Mode Select
This data type defines the ADC Sampling Mode Select.
Members
Members Description
ADC_SAMPLING_MODE_SIMULTANEOUS Simultaneous Sampling Mode
ADC_SAMPLING_MODE_SEQUENTIAL Sequential Sampling Mode
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.13 ADC_INPUTS_SCAN Enumeration
C
typedef enum {
ADC_INPUT_SCAN_AN0,
ADC_INPUT_SCAN_AN1,
ADC_INPUT_SCAN_AN2,
ADC_INPUT_SCAN_AN3,
ADC_INPUT_SCAN_AN4,
ADC_INPUT_SCAN_AN5,
ADC_INPUT_SCAN_AN6,
ADC_INPUT_SCAN_AN7,
ADC_INPUT_SCAN_AN8,
ADC_INPUT_SCAN_AN9,
ADC_INPUT_SCAN_AN10,
ADC_INPUT_SCAN_AN11,
ADC_INPUT_SCAN_AN12,
ADC_INPUT_SCAN_AN13,
ADC_INPUT_SCAN_AN14,
ADC_INPUT_SCAN_AN15,
ADC_INPUT_SCAN_AN16,
ADC_INPUT_SCAN_AN17,
ADC_INPUT_SCAN_AN18,
ADC_INPUT_SCAN_AN19,
ADC_INPUT_SCAN_AN20,
ADC_INPUT_SCAN_AN21,
ADC_INPUT_SCAN_AN22,
ADC_INPUT_SCAN_AN23,
ADC_INPUT_SCAN_AN24,
ADC_INPUT_SCAN_AN25,
ADC_INPUT_SCAN_AN26,
ADC_INPUT_SCAN_AN27,
ADC_INPUT_SCAN_AN28,
ADC_INPUT_SCAN_AN29,
ADC_INPUT_SCAN_AN30,
ADC_INPUT_SCAN_AN31,
ADC_INPUT_SCAN_IVREF,
ADC_INPUT_SCAN_CTMU,
ADC_INPUT_SCAN_VSS,
ADC_INPUT_SCAN_VBG_DIV_BY_6,
ADC_INPUT_SCAN_VBG_DIV_BY_2,
ADC_INPUT_SCAN_VBG_DIV_BY_1,
ADC_INPUT_SCAN_VDDCORE,
ADC_INPUT_SCAN_ALL
} ADC_INPUTS_SCAN;
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Description
ADC Scan Inputs Enumeration
This data type defines the ADC Scan inputs.
Members
Members Description
ADC_INPUT_SCAN_AN0 Scan input is AN0
ADC_INPUT_SCAN_AN1 Scan input is AN1
ADC_INPUT_SCAN_AN2 Scan input is AN2
ADC_INPUT_SCAN_AN3 Scan input is AN3
ADC_INPUT_SCAN_AN4 Scan input is AN4
ADC_INPUT_SCAN_AN5 Scan input is AN5
ADC_INPUT_SCAN_AN6 Scan input is AN6
ADC_INPUT_SCAN_AN7 Scan input is AN7
ADC_INPUT_SCAN_AN8 Scan input is AN8
ADC_INPUT_SCAN_AN9 Scan input is AN9
ADC_INPUT_SCAN_AN10 Scan input is AN10
ADC_INPUT_SCAN_AN11 Scan input is AN11
ADC_INPUT_SCAN_AN12 Scan input is AN12
ADC_INPUT_SCAN_AN13 Scan input is AN13
ADC_INPUT_SCAN_AN14 Scan input is AN14
ADC_INPUT_SCAN_AN15 Scan input is AN15
ADC_INPUT_SCAN_AN16 Scan input is AN16
ADC_INPUT_SCAN_AN17 Scan input is AN17
ADC_INPUT_SCAN_AN18 Scan input is AN18
ADC_INPUT_SCAN_AN19 Scan input is AN19
ADC_INPUT_SCAN_AN20 Scan input is AN20
ADC_INPUT_SCAN_AN21 Scan input is AN21
ADC_INPUT_SCAN_AN22 Scan input is AN22
ADC_INPUT_SCAN_AN23 Scan input is AN23
ADC_INPUT_SCAN_AN24 Scan input is AN24
ADC_INPUT_SCAN_AN25 Scan input is AN25
ADC_INPUT_SCAN_AN26 Scan input is AN26
ADC_INPUT_SCAN_AN27 Scan input is AN27
ADC_INPUT_SCAN_AN28 Scan input is AN28
ADC_INPUT_SCAN_AN29 Scan input is AN29
ADC_INPUT_SCAN_AN30 Scan input is AN30
ADC_INPUT_SCAN_AN31 Scan input is AN31
ADC_INPUT_SCAN_IVREF Scan input is IVref
ADC_INPUT_SCAN_CTMU Scan input is CTMU input
ADC_INPUT_SCAN_VSS Scan input is Vss
ADC_INPUT_SCAN_VBG_DIV_BY_6 Scan input is VBG/6
ADC_INPUT_SCAN_VBG_DIV_BY_2 Scan input is VBG/2
ADC_INPUT_SCAN_VBG_DIV_BY_1 Scan input is VBG
ADC_INPUT_SCAN_VDDCORE Scan input is VDDCORE
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ADC_INPUT_SCAN_ALL All Inputs
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.14 ADC_REFERENCE_INPUT Enumeration
C
typedef enum {
ADC_REFERENCE_INPUT_VBG_DIV_BY_1,
ADC_REFERENCE_INPUT_VBG_DIV_BY_2,
ADC_REFERENCE_INPUT_VBG_DIV_BY_6,
ADC_REFERENCE_INPUT_VDDCORE
} ADC_REFERENCE_INPUT;
Description
ADC Reference Input Enumeration
This data type defines the ADC Reference Input Enumeration.
Members
Members Description
ADC_REFERENCE_INPUT_VBG_DIV_BY_1 Internal Band Gap Reference Channel VBG
ADC_REFERENCE_INPUT_VBG_DIV_BY_2 Internal Band Gap Reference Channel VBG/2
ADC_REFERENCE_INPUT_VBG_DIV_BY_6 Internal Band Gap Reference Channel VBG/6
ADC_REFERENCE_INPUT_VDDCORE Internal Reference Channel VDDCORE
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.15 ADC_RESULT_FORMAT Enumeration
C
typedef enum {
ADC_RESULT_FORMAT_LEFT_JUSTIFIED,
ADC_RESULT_FORMAT_RIGHT_JUSTIFIED,
ADC_RESULT_FORMAT_INTEGER_16BIT,
ADC_RESULT_FORMAT_SIGNED_INTEGER_16BIT,
ADC_RESULT_FORMAT_FRACTIONAL_16BIT,
ADC_RESULT_FORMAT_SIGNED_FRACTIONAL_16BIT,
ADC_RESULT_FORMAT_INTEGER_32BIT,
ADC_RESULT_FORMAT_SIGNED_INTEGER_32BIT,
ADC_RESULT_FORMAT_FRACTIONAL_32BIT,
ADC_RESULT_FORMAT_SIGNED_FRACTIONAL_32BIT
} ADC_RESULT_FORMAT;
Description
ADC Result Format
This data type defines the ADC Result Format.
Members
Members Description
ADC_RESULT_FORMAT_LEFT_JUSTIFIED Result Left justified
ADC_RESULT_FORMAT_RIGHT_JUSTIFIED Result Right justified
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ADC_RESULT_FORMAT_INTEGER_16BIT Integer 16-bit
ADC_RESULT_FORMAT_SIGNED_INTEGER_16BIT Signed Integer 16-bit
ADC_RESULT_FORMAT_FRACTIONAL_16BIT Fractional 16-bit
ADC_RESULT_FORMAT_SIGNED_FRACTIONAL_16BIT Signed Fractional 16-bit
ADC_RESULT_FORMAT_INTEGER_32BIT Integer 32-bit
ADC_RESULT_FORMAT_SIGNED_INTEGER_32BIT Signed Integer 32-bit
ADC_RESULT_FORMAT_FRACTIONAL_32BIT Fractional 32-bit
ADC_RESULT_FORMAT_SIGNED_FRACTIONAL_32BIT Signed Fractional 32-bit
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.16 ADC_DMA_BUFFER_MODE Enumeration
C
typedef enum {
ADC_DMA_BUFFER_MODE_SCATTER_GATHER,
ADC_DMA_BUFFER_MODE_ORDER_OF_CONV
} ADC_DMA_BUFFER_MODE;
Description
ADC DMA Buffer Mode
This data type defines the ADC Buffer Mode.
Members
Members Description
ADC_DMA_BUFFER_MODE_SCATTER_GATHER DMA buffers are written in Scatter/Gather mode
ADC_DMA_BUFFER_MODE_ORDER_OF_CONV DMA buffers are written in the order of conversion
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.17 ADC_PAIR Enumeration
C
typedef enum {
ADC_PAIR_AN0_AN1,
ADC_PAIR_AN2_AN3,
ADC_PAIR_AN4_AN5,
ADC_PAIR_AN6_AN7,
ADC_PAIR_AN8_AN9,
ADC_PAIR_AN10_AN11,
ADC_PAIR_AN12_AN13,
ADC_PAIR_AN14_AN15,
ADC_PAIR_AN16_AN17,
ADC_PAIR_AN18_AN19,
ADC_PAIR_AN20_AN21,
ADC_PAIR_AN22_AN23,
ADC_PAIR_AN24_AN25
} ADC_PAIR;
Description
ADC Pair
This data type defines the ADC Pair.
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Members
Members Description
ADC_PAIR_AN0_AN1 Pair 0 - AN0, AN1
ADC_PAIR_AN2_AN3 Pair 1 - AN2, AN3
ADC_PAIR_AN4_AN5 Pair 2 - AN4, AN5
ADC_PAIR_AN6_AN7 Pair 3 - AN6, AN7
ADC_PAIR_AN8_AN9 Pair 4 - AN8, AN9
ADC_PAIR_AN10_AN11 Pair 5 - AN10, AN11
ADC_PAIR_AN12_AN13 Pair 6 - AN12, AN13
ADC_PAIR_AN14_AN15 Pair 7 - AN14, AN15
ADC_PAIR_AN16_AN17 Pair 8 - AN16, AN17
ADC_PAIR_AN18_AN19 Pair 9 - AN18, AN19
ADC_PAIR_AN20_AN21 Pair 10 - AN20, AN21
ADC_PAIR_AN22_AN23 Pair 11 - AN22, AN23
ADC_PAIR_AN24_AN25 Pair 12 - AN24, AN25
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.18 ADC_CHANNEL123_INPUTS_NEG Enumeration
C
typedef enum {
ADC_CHANNEL123_INPUT_NEG_CH123_VREF_MINUS,
ADC_CHANNEL123_INPUT_NEG_CH1_AN6_CH2_AN7_CH3_NC,
ADC_CHANNEL123_INPUT_NEG_CH1_AN6_CH2_AN7_CH3_AN8,
ADC_CHANNEL123_INPUT_NEG_CH1_AN9_CH2_AN10_CH3_AN11,
ADC_CHANNEL123_INPUT_NEG_CH1_AN9_CH2_CH3_NC
} ADC_CHANNEL123_INPUTS_NEG;
Description
ADC Channel 123 Negative Input Select
This data type defines the ADC Channel 123 Negative Input Select.
Members
Members Description
ADC_CHANNEL123_INPUT_NEG_CH123_VREF_MINUS CH1, CH2, CH3 negative input is VREF
ADC_CHANNEL123_INPUT_NEG_CH1_AN6_CH2_AN7_CH3_NC CH1 negative input is AN6, CH2 negative input is AN7,
CH3 negative input is not connected
ADC_CHANNEL123_INPUT_NEG_CH1_AN6_CH2_AN7_CH3_AN8 CH1 negative input is AN6, CH2 negative input is AN7,
CH3 negative input is AN8
ADC_CHANNEL123_INPUT_NEG_CH1_AN9_CH2_AN10_CH3_AN11 CH1 negative input is AN9, CH2 negative input is
AN10, CH3 negative input is AN11
ADC_CHANNEL123_INPUT_NEG_CH1_AN9_CH2_CH3_NC CH1 negative input is AN9, CH2 and CH3 negative
inputs are not connected
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
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5.6.1.6.8.19 ADC_CHANNEL123_INPUTS_POS Enumeration
C
typedef enum {
ADC_CHANNEL123_INPUT_POS_CH1_AN3_CH2_CH3_NC,
ADC_CHANNEL123_INPUT_POS_CH1_AN0_CH2_AN1_CH3_AN2,
ADC_CHANNEL123_INPUT_POS_CH1_AN3_CH2_AN4_CH3_AN5
} ADC_CHANNEL123_INPUTS_POS;
Description
ADC Channel 123 Positive Input Select
This data type defines the ADC Channel 123 Positive Input Select.
Members
Members Description
ADC_CHANNEL123_INPUT_POS_CH1_AN3_CH2_CH3_NC CH1 positive input is AN3, CH2 and CH3 positive inputs
are not connected
ADC_CHANNEL123_INPUT_POS_CH1_AN0_CH2_AN1_CH3_AN2 CH1 positive input is AN0, CH2 positive input is AN1,
CH3 positive input is AN2
ADC_CHANNEL123_INPUT_POS_CH1_AN3_CH2_AN4_CH3_AN5 CH1 positive input is AN3, CH2 positive input is AN4,
CH3 positive input is AN5
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.20 ADC_INPUTS_POSITIVE Enumeration
C
typedef enum {
ADC_INPUT_POSITIVE_AN0,
ADC_INPUT_POSITIVE_AN1,
ADC_INPUT_POSITIVE_AN2,
ADC_INPUT_POSITIVE_AN3,
ADC_INPUT_POSITIVE_AN4,
ADC_INPUT_POSITIVE_AN5,
ADC_INPUT_POSITIVE_AN6,
ADC_INPUT_POSITIVE_AN7,
ADC_INPUT_POSITIVE_AN8,
ADC_INPUT_POSITIVE_AN9,
ADC_INPUT_POSITIVE_AN10,
ADC_INPUT_POSITIVE_AN11,
ADC_INPUT_POSITIVE_AN12,
ADC_INPUT_POSITIVE_AN13,
ADC_INPUT_POSITIVE_AN14,
ADC_INPUT_POSITIVE_AN15,
ADC_INPUT_POSITIVE_AN16,
ADC_INPUT_POSITIVE_AN17,
ADC_INPUT_POSITIVE_AN18,
ADC_INPUT_POSITIVE_AN19,
ADC_INPUT_POSITIVE_AN20,
ADC_INPUT_POSITIVE_AN21,
ADC_INPUT_POSITIVE_AN22,
ADC_INPUT_POSITIVE_AN23,
ADC_INPUT_POSITIVE_AN24,
ADC_INPUT_POSITIVE_AN25,
ADC_INPUT_POSITIVE_AN26,
ADC_INPUT_POSITIVE_AN27,
ADC_INPUT_POSITIVE_AN28,
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ADC_INPUT_POSITIVE_AN29,
ADC_INPUT_POSITIVE_AN30,
ADC_INPUT_POSITIVE_AN31,
ADC_INPUT_POSITIVE_ABS_VOLTAGE_REF,
ADC_INPUT_POSITIVE_MUX_DISCONNECT,
ADC_INPUT_POSITIVE_TEMP_INDICATOR,
ADC_INPUT_POSITIVE_DAC_OUTPUT,
ADC_INPUT_POSITIVE_FVR_BUFFER1_OUTPUT,
ADC_INPUT_POSITIVE_VBG_DIV_BY_6,
ADC_INPUT_POSITIVE_VBG_DIV_BY_2,
ADC_INPUT_POSITIVE_VBG_DIV_BY_1,
ADC_INPUT_POSITIVE_VDDCORE,
ADC_INPUT_POSITIVE_MAX,
ADC_INPUT_POSITIVE_CTMU,
ADC_INPUT_POSITIVE_IVREF,
ADC_INPUT_POSITIVE_OPEN
} ADC_INPUTS_POSITIVE;
Description
ADC Inputs Enumeration
This data type defines the ADC inputs.
Members
Members Description
ADC_INPUT_POSITIVE_AN0 Positive input is AN0
ADC_INPUT_POSITIVE_AN1 Positive input is AN1
ADC_INPUT_POSITIVE_AN2 Positive input is AN2
ADC_INPUT_POSITIVE_AN3 Positive input is AN3
ADC_INPUT_POSITIVE_AN4 Positive input is AN4
ADC_INPUT_POSITIVE_AN5 Positive input is AN5
ADC_INPUT_POSITIVE_AN6 Positive input is AN6
ADC_INPUT_POSITIVE_AN7 Positive input is AN7
ADC_INPUT_POSITIVE_AN8 Positive input is AN8
ADC_INPUT_POSITIVE_AN9 Positive input is AN9
ADC_INPUT_POSITIVE_AN10 Positive input is AN10
ADC_INPUT_POSITIVE_AN11 Positive input is AN11
ADC_INPUT_POSITIVE_AN12 Positive input is AN12
ADC_INPUT_POSITIVE_AN13 Positive input is AN13
ADC_INPUT_POSITIVE_AN14 Positive input is AN14
ADC_INPUT_POSITIVE_AN15 Positive input is AN15
ADC_INPUT_POSITIVE_AN16 Positive input is AN16
ADC_INPUT_POSITIVE_AN17 Positive input is AN17
ADC_INPUT_POSITIVE_AN18 Positive input is AN18
ADC_INPUT_POSITIVE_AN19 Positive input is AN19
ADC_INPUT_POSITIVE_AN20 Positive input is AN20
ADC_INPUT_POSITIVE_AN21 Positive input is AN21
ADC_INPUT_POSITIVE_AN22 Positive input is AN22
ADC_INPUT_POSITIVE_AN23 Positive input is AN23
ADC_INPUT_POSITIVE_AN24 Positive input is AN24
ADC_INPUT_POSITIVE_AN25 Positive input is AN25
ADC_INPUT_POSITIVE_AN26 Positive input is AN26
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ADC_INPUT_POSITIVE_AN27 Positive input is AN27
ADC_INPUT_POSITIVE_AN28 Positive input is AN28
ADC_INPUT_POSITIVE_AN29 Positive input is AN29
ADC_INPUT_POSITIVE_AN30 Positive input is AN30
ADC_INPUT_POSITIVE_AN31 Positive input is AN31
ADC_INPUT_POSITIVE_ABS_VOLTAGE_REF ADC Channel 0.6V Absolute Voltage Reference
ADC_INPUT_POSITIVE_MUX_DISCONNECT ADC Channel MUX Disconnect
ADC_INPUT_POSITIVE_TEMP_INDICATOR ADC Channel Temparature Diode/Indicator
ADC_INPUT_POSITIVE_DAC_OUTPUT ADC Channel DAC Output
ADC_INPUT_POSITIVE_FVR_BUFFER1_OUTPUT ADC Channel Fixed Voltage Reference Buffer1 Output
ADC_INPUT_POSITIVE_VBG_DIV_BY_6 Positive input is VBG/6
ADC_INPUT_POSITIVE_VBG_DIV_BY_2 Positive input is VBG/2
ADC_INPUT_POSITIVE_VBG_DIV_BY_1 Positive input is VBG
ADC_INPUT_POSITIVE_VDDCORE Positive input is VDDCORE
ADC_INPUT_POSITIVE_MAX Maximum Inputs
ADC_INPUT_POSITIVE_CTMU Positive input is from CTMU
ADC_INPUT_POSITIVE_IVREF Positive input is IVref
ADC_INPUT_POSITIVE_OPEN Positive input is Open
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.21 ADC_CONVERSION_ORDER Enumeration
C
typedef enum {
ADC_CONVERSION_ORDER_ODD_FIRST,
ADC_CONVERSION_ORDER_EVEN_FIRST
} ADC_CONVERSION_ORDER;
Description
ADC Conversion Order
This data type defines the ADC Conversion Order.
Members
Members Description
ADC_CONVERSION_ORDER_ODD_FIRST Odd numbered analog input is converted first, followed by conversion of even
numbered input
ADC_CONVERSION_ORDER_EVEN_FIRST Even numbered analog input is converted first, followed by conversion of odd
numbered input
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.22 ADC_DMA_ADDRESS_INCREMENT Enumeration
C
typedef enum {
ADC_DMA_ADDRESS_INCREMENT_EVERY_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_2ND_SAMPLE,
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ADC_DMA_ADDRESS_INCREMENT_EVERY_3RD_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_4TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_5TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_6TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_7TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_8TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_9TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_10TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_11TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_12TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_13TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_14TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_15TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_16TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_17TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_18TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_19TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_20TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_21ST_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_22ND_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_23RD_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_24TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_25TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_26TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_27TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_28TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_29TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_30TH_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_31ST_SAMPLE,
ADC_DMA_ADDRESS_INCREMENT_EVERY_32ND_SAMPLE
} ADC_DMA_ADDRESS_INCREMENT;
Description
ADC DMA Increment Rate
This data type defines the ADC DMA Increment Rate.
Members
Members Description
ADC_DMA_ADDRESS_INCREMENT_EVERY_SAMPLE Increments the DMA address after completion of every
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_2ND_SAMPLE Increments the DMA address after completion of every 2nd
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_3RD_SAMPLE Increments the DMA address after completion of every 3rd
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_4TH_SAMPLE Increments the DMA address after completion of every 4th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_5TH_SAMPLE Increments the DMA address after completion of every 5th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_6TH_SAMPLE Increments the DMA address after completion of every 6th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_7TH_SAMPLE Increments the DMA address after completion of every 7th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_8TH_SAMPLE Increments the DMA address after completion of every 8th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_9TH_SAMPLE Increments the DMA address after completion of every 9th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_10TH_SAMPLE Increments the DMA address after completion of every 10th
sample/conversion operation
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ADC_DMA_ADDRESS_INCREMENT_EVERY_11TH_SAMPLE Increments the DMA address after completion of every 11th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_12TH_SAMPLE Increments the DMA address after completion of every 12th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_13TH_SAMPLE Increments the DMA address after completion of every 13th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_14TH_SAMPLE Increments the DMA address after completion of every 14th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_15TH_SAMPLE Increments the DMA address after completion of every 15th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_16TH_SAMPLE Increments the DMA address after completion of every 16th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_17TH_SAMPLE Increments the DMA address after completion of every 17th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_18TH_SAMPLE Increments the DMA address after completion of every 18th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_19TH_SAMPLE Increments the DMA address after completion of every 19th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_20TH_SAMPLE Increments the DMA address after completion of every 20th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_21ST_SAMPLE Increments the DMA address after completion of every 21st
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_22ND_SAMPLE Increments the DMA address after completion of every 22nd
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_23RD_SAMPLE Increments the DMA address after completion of every 23rd
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_24TH_SAMPLE Increments the DMA address after completion of every 24th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_25TH_SAMPLE Increments the DMA address after completion of every 25th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_26TH_SAMPLE Increments the DMA address after completion of every 26th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_27TH_SAMPLE Increments the DMA address after completion of every 27th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_28TH_SAMPLE Increments the DMA address after completion of every 28th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_29TH_SAMPLE Increments the DMA address after completion of every 29th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_30TH_SAMPLE Increments the DMA address after completion of every 30th
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_31ST_SAMPLE Increments the DMA address after completion of every 31st
sample/conversion operation
ADC_DMA_ADDRESS_INCREMENT_EVERY_32ND_SAMPLE Increments the DMA address after completion of every 32nd
sample/conversion operation
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.23 ADC_DMA_INPUT_BUFFER Enumeration
C
typedef enum {
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1437
ADC_DMA_INPUT_BUFFER_1WORD,
ADC_DMA_INPUT_BUFFER_2WORDS,
ADC_DMA_INPUT_BUFFER_4WORDS,
ADC_DMA_INPUT_BUFFER_8WORDS,
ADC_DMA_INPUT_BUFFER_16WORDS,
ADC_DMA_INPUT_BUFFER_32WORDS,
ADC_DMA_INPUT_BUFFER_64WORDS,
ADC_DMA_INPUT_BUFFER_128WORDS
} ADC_DMA_INPUT_BUFFER;
Description
ADC DMA Buffer Per Input
This data type defines the ADC DMA Buffer Per Input.
Members
Members Description
ADC_DMA_INPUT_BUFFER_1WORD Allocates 1 word of buffer to each analog input
ADC_DMA_INPUT_BUFFER_2WORDS Allocates 2 words of buffer to each analog input
ADC_DMA_INPUT_BUFFER_4WORDS Allocates 4 words of buffer to each analog input
ADC_DMA_INPUT_BUFFER_8WORDS Allocates 8 words of buffer to each analog input
ADC_DMA_INPUT_BUFFER_16WORDS Allocates 16 words of buffer to each analog input
ADC_DMA_INPUT_BUFFER_32WORDS Allocates 32 words of buffer to each analog input
ADC_DMA_INPUT_BUFFER_64WORDS Allocates 64 words of buffer to each analog input
ADC_DMA_INPUT_BUFFER_128WORDS Allocates 128 words of buffer to each analog input
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all devices.
5.6.1.6.8.24 ADC_ACQUISITION_TIME Type
C
typedef unsigned int ADC_ACQUISITION_TIME;
Description
ADC Acquisition Time Selection Data Type
This data type defines the different ADC acquisition times by which the ADC can be configured.
Remarks
None
5.6.1.6.8.25 ADC_CONVERSION_CLOCK Type
C
typedef unsigned int ADC_CONVERSION_CLOCK;
Description
ADC Conversion Clock Selection Data Type
This data type defines the different ADC Conversion clock
Remarks
None
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1438
5.6.1.6.8.26 ADC_SAMPLE Type
C
typedef unsigned int ADC_SAMPLE;
Description
ADC Sample size
This data type defines the size of the adc sample register.
Remarks
None
5.6.1.6.9 Feature Existence
5.6.1.6.9.1 PLIB_ADC_ExistsAsynchronousDedicatedSampling Function
C
bool PLIB_ADC_ExistsAsynchronousDedicatedSampling(
ADC_MODULE_ID index
);
Description
This function identifies whether the AsynchronousDedicatedSampling feature is available on the ADC module. When this
function returns true, these functions are supported on the device:
• PLIB_ADC_AsynchronousDedicatedSamplingEnable
• PLIB_ADC_AsynchronousDedicatedSamplingDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The AsynchronousDedicatedSampling feature is supported on the device
• false = The AsynchronousDedicatedSampling feature is not supported on the device
Remarks
None.
5.6.1.6.9.2 PLIB_ADC_ExistsCalibrationControl Function
C
bool PLIB_ADC_ExistsCalibrationControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the CalibrationControl feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1439
• PLIB_ADC_CalibrationEnable
• PLIB_ADC_CalibrationDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The CalibrationControl feature is supported on the device
• false = The CalibrationControl feature is not supported on the device
Remarks
None.
5.6.1.6.9.3 PLIB_ADC_ExistsChannelGroup Function
C
bool PLIB_ADC_ExistsChannelGroup(
ADC_MODULE_ID index
);
Description
This function identifies whether the ChannelGroup feature is available on the ADC module. When this function returns true, these
functions are supported on the device:
• PLIB_ADC_ChannelGroupSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ChannelGroup feature is supported on the device
• false = The ChannelGroup feature is not supported on the device
Remarks
None.
5.6.1.6.9.4 PLIB_ADC_ExistsConversionClock Function
C
bool PLIB_ADC_ExistsConversionClock(
ADC_MODULE_ID index
);
Description
This function identifies whether the ConversionClock feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1440
• PLIB_ADC_ConversionClockSet
• PLIB_ADC_ConversionClockGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ConversionClock feature is supported on the device
• false = The ConversionClock feature is not supported on the device
Remarks
None.
5.6.1.6.9.5 PLIB_ADC_ExistsConversionClockSource Function
C
bool PLIB_ADC_ExistsConversionClockSource(
ADC_MODULE_ID index
);
Description
This function identifies whether the ConversionClockSource feature is available on the ADC module. When this function returns
true, these functions are supported on the device:
• PLIB_ADC_ConversionClockSourceSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ConversionClockSource feature is supported on the device
• false = The ConversionClockSource feature is not supported on the device
Remarks
None.
5.6.1.6.9.6 PLIB_ADC_ExistsConversionControl Function
C
bool PLIB_ADC_ExistsConversionControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the ConversionControl feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1441
• PLIB_ADC_ConversionStart
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = When ConversionControl feature is supported on the device
• false = When ConversionControl feature is not supported on the device
Remarks
None.
5.6.1.6.9.7 PLIB_ADC_ExistsConversionOrder Function
C
bool PLIB_ADC_ExistsConversionOrder(
ADC_MODULE_ID index
);
Description
This function identifies whether the ConversionOrder feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_ConversionOrderSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ConversionOrder feature is supported on the device
• false = The ConversionOrder feature is not supported on the device
Remarks
None.
5.6.1.6.9.8 PLIB_ADC_ExistsConversionStatus Function
C
bool PLIB_ADC_ExistsConversionStatus(
ADC_MODULE_ID index
);
Description
This function identifies whether the ConversionStatus feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_ConversionHasCompleted
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1442
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ConversionStatus feature is supported on the device
• false = The ConversionStatus feature is not supported on the device
Remarks
None.
5.6.1.6.9.9 PLIB_ADC_ExistsConversionStopSequenceControl Function
C
bool PLIB_ADC_ExistsConversionStopSequenceControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the ConversionStopSequenceControl feature is available on the ADC module. When this function
returns true, these functions are supported on the device:
• PLIB_ADC_ConversionStopSequenceEnable
• PLIB_ADC_ConversionStopSequenceDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ConversionStopSequenceControl feature is supported on the device
• false = The ConversionStopSequenceControl feature is not supported on the device
Remarks
None.
5.6.1.6.9.10 PLIB_ADC_ExistsConversionTriggerGroup Function
C
bool PLIB_ADC_ExistsConversionTriggerGroup(
ADC_MODULE_ID index
);
Description
This function identifies whether the ConversionTriggerGroup feature is available on the ADC module. When this function returns
true, these functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1443
• PLIB_ADC_ConversionTriggerGroupSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ConversionTriggerGroup feature is supported on the device
• false = The ConversionTriggerGroup feature is not supported on the device
Remarks
None.
5.6.1.6.9.11 PLIB_ADC_ExistsConversionTriggerSource Function
C
bool PLIB_ADC_ExistsConversionTriggerSource(
ADC_MODULE_ID index
);
Description
This function identifies whether the ConversionTriggerSource feature is available on the ADC module. When this function returns
true, these functions are supported on the device:
• PLIB_ADC_ConversionTriggerSourceSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ConversionTriggerSource feature is supported on the device
• false = The ConversionTriggerSource feature is not supported on the device
Remarks
None.
5.6.1.6.9.12 PLIB_ADC_ExistsDMAAddressIncrement Function
C
bool PLIB_ADC_ExistsDMAAddressIncrement(
ADC_MODULE_ID index
);
Description
This function identifies whether the DMAAddressIncrement feature is available on the ADC module. When this function returns
true, these functions are supported on the device:
• PLIB_ADC_DMAAddressIncrementSelect
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1444
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The DMAAddressIncrement feature is supported on the device
• false = The DMAAddressIncrement feature is not supported on the device
Remarks
None.
5.6.1.6.9.13 PLIB_ADC_ExistsDMABufferMode Function
C
bool PLIB_ADC_ExistsDMABufferMode(
ADC_MODULE_ID index
);
Description
This function identifies whether the DMABufferMode feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_DMABufferModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The DMABufferMode feature is supported on the device
• false = The DMABufferMode feature is not supported on the device
Remarks
None.
5.6.1.6.9.14 PLIB_ADC_ExistsDMABuffersPerAnalogInput Function
C
bool PLIB_ADC_ExistsDMABuffersPerAnalogInput(
ADC_MODULE_ID index
);
Description
This function identifies whether the DMABuffersPerInput feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_DMAInputBufferSelect
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1445
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The DMABuffersPerInput feature is supported on the device
• false = The DMABuffersPerInput feature is not supported on the device
Remarks
None.
5.6.1.6.9.15 PLIB_ADC_ExistsDMAControl Function
C
bool PLIB_ADC_ExistsDMAControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the DMAControl feature is available on the ADC module. When this function returns true, these
functions are supported on the device:
• PLIB_ADC_DMAEnable
• PLIB_ADC_DMADisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The DMAControl feature is supported on the device
• false = The DMAControl feature is not supported on the device
Remarks
None.
5.6.1.6.9.16 PLIB_ADC_ExistsEnableControl Function
C
bool PLIB_ADC_ExistsEnableControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the ADC module. When this function returns true, these
functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1446
• PLIB_ADC_Enable
• PLIB_ADC_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The EnableControl feature is supported on the device
• false = The EnableControl feature is not supported on the device
Remarks
None.
5.6.1.6.9.17 PLIB_ADC_ExistsGlobalSoftwareTrigger Function
C
bool PLIB_ADC_ExistsGlobalSoftwareTrigger(
ADC_MODULE_ID index
);
Description
This function identifies whether the GlobalSoftwareTrigger feature is available on the ADC module. When this function returns
true, these functions are supported on the device:
• PLIB_ADC_GlobalSoftwareTriggerSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The GlobalSoftwareTrigger feature is supported on the device
• false = The GlobalSoftwareTrigger feature is not supported on the device
Remarks
None.
5.6.1.6.9.18 PLIB_ADC_ExistsInputSelect Function
C
bool PLIB_ADC_ExistsInputSelect(
ADC_MODULE_ID index
);
Description
This function identifies whether the InputSelect feature is available on the ADC module. When this function returns true, these
functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1447
• PLIB_ADC_InputSelectPositive
• PLIB_ADC_InputSelectNegative
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The InputSelect feature is supported on the device
• false = The InputSelect feature is not supported on the device
Remarks
None.
5.6.1.6.9.19 PLIB_ADC_ExistsInternalReferenceChannelControl Function
C
bool PLIB_ADC_ExistsInternalReferenceChannelControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the InternalReferenceChannelControl feature is available on the ADC module. When this function
returns true, these functions are supported on the device:
• PLIB_ADC_InternalReferenceChannelEnable
• PLIB_ADC_InternalReferenceChannelDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The InternalReferenceChannelControl feature is supported on the device
• false = The InternalReferenceChannelControl feature is not supported on the device
Remarks
None.
5.6.1.6.9.20 PLIB_ADC_ExistsISRJumpTableBaseAddress Function
C
bool PLIB_ADC_ExistsISRJumpTableBaseAddress(
ADC_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1448
Description
This function identifies whether the ISRJumpTableBaseAddress feature is available on the ADC module. When this function
returns true, these functions are supported on the device:
• PLIB_ADC_IsrJumpTableBaseAddressSet
• PLIB_ADC_IsrJumpTableBaseAddressGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ISRJumpTableBaseAddress feature is supported on the device
• false = The ISRJumpTableBaseAddress feature is not supported on the device
Remarks
None.
5.6.1.6.9.21 PLIB_ADC_ExistsMuxChannel0NegativeInput Function
C
bool PLIB_ADC_ExistsMuxChannel0NegativeInput(
ADC_MODULE_ID index
);
Description
This function identifies whether the MuxChannel0NegativeInput feature is available on the ADC module. When this function
returns true, these functions are supported on the device:
• PLIB_ADC_MuxChannel0InputNegativeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The MuxChannel0NegativeInput feature is supported on the device
• false = The MuxChannel0NegativeInput feature is not supported on the device
Remarks
None.
5.6.1.6.9.22 PLIB_ADC_ExistsMuxChannel0PositiveInput Function
C
bool PLIB_ADC_ExistsMuxChannel0PositiveInput(
ADC_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1449
);
Description
This function identifies whether the MuxChannel0PositiveInput feature is available on the ADC module. When this function
returns true, these functions are supported on the device:
• PLIB_ADC_MuxChannel0InputPositiveSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The MuxChannel0PositiveInput feature is supported on the device
• false = The MuxChannel0PositiveInput feature is not supported on the device
Remarks
None.
5.6.1.6.9.23 PLIB_ADC_ExistsMuxChannel123NegativeInput Function
C
bool PLIB_ADC_ExistsMuxChannel123NegativeInput(
ADC_MODULE_ID index
);
Description
This function identifies whether the MuxChannel123NegativeInput feature is available on the ADC module. When this function
returns true, these functions are supported on the device:
• PLIB_ADC_MuxChannel123InputNegativeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The MuxChannel123NegativeInput feature is supported on the device
• false = The MuxChannel123NegativeInput feature is not supported on the device
Remarks
None.
5.6.1.6.9.24 PLIB_ADC_ExistsMuxChannel123PositiveInput Function
C
bool PLIB_ADC_ExistsMuxChannel123PositiveInput(
ADC_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1450
Description
This function identifies whether the MuxChannel123PositiveInput feature is available on the ADC module. When this function
returns true, these functions are supported on the device:
• PLIB_ADC_MuxChannel123InputPositiveSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The MuxChannel123PositiveInput feature is supported on the device
• false = The MuxChannel123PositiveInput feature is not supported on the device
Remarks
None.
5.6.1.6.9.25 PLIB_ADC_ExistsMuxInputScanControl Function
C
bool PLIB_ADC_ExistsMuxInputScanControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the MuxInputScanControl feature is available on the ADC module. When this function returns
true, these functions are supported on the device:
• PLIB_ADC_MuxAInputScanEnable
• PLIB_ADC_MuxAInputScanDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The MuxInputScanControl feature is supported on the device
• false = The MuxInputScanControl feature is not supported on the device
Remarks
None.
5.6.1.6.9.26 PLIB_ADC_ExistsMuxInputScanSelect Function
C
bool PLIB_ADC_ExistsMuxInputScanSelect(
ADC_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1451
);
Description
This function identifies whether the MuxInputScanSelect feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_InputScanMaskAdd
• PLIB_ADC_InputScanMaskRemove
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The MuxInputScanSelect feature is supported on the device
• false = The MuxInputScanSelect feature is not supported on the device
Remarks
None.
5.6.1.6.9.27 PLIB_ADC_ExistsPairConversionControl Function
C
bool PLIB_ADC_ExistsPairConversionControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the PairConversionControl feature is available on the ADC module. When this function returns
true, these functions are supported on the device:
• PLIB_ADC_PairConversionStart
• PLIB_ADC_PairConversionIsPending
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PairConversionControl feature is supported on the device
• false = The PairConversionControl feature is not supported on the device
Remarks
None.
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1452
5.6.1.6.9.28 PLIB_ADC_ExistsPairInterruptOnConversion Function
C
bool PLIB_ADC_ExistsPairInterruptOnConversion(
ADC_MODULE_ID index
);
Description
This function identifies whether the PairInterruptOnConversion feature is available on the ADC module. When this function
returns true, these functions are supported on the device:
• PLIB_ADC_PairInterruptAfterFirstConversion
• PLIB_ADC_PairInterruptAfterSecondConversion
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PairInterruptOnConversion feature is supported on the device
• false = The PairInterruptOnConversion feature is not supported on the device
Remarks
None.
5.6.1.6.9.29 PLIB_ADC_ExistsPairInterruptRequest Function
C
bool PLIB_ADC_ExistsPairInterruptRequest(
ADC_MODULE_ID index
);
Description
This function identifies whether the PairInterruptRequest feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_PairInterruptRequestEnable
• PLIB_ADC_PairInterruptRequestDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PairInterruptRequest feature is supported on the device
• false = The PairInterruptRequest feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1453
Remarks
None.
5.6.1.6.9.30 PLIB_ADC_ExistsPairSampleStatus Function
C
bool PLIB_ADC_ExistsPairSampleStatus(
ADC_MODULE_ID index
);
Description
This function identifies whether the PairSampleStatus feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_PairSampleStatusClear
• PLIB_ADC_PairSampleIsAvailable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PairSampleStatus feature is supported on the device
• false = The PairSampleStatus feature is not supported on the device
Remarks
None.
5.6.1.6.9.31 PLIB_ADC_ExistsPairTriggerSource Function
C
bool PLIB_ADC_ExistsPairTriggerSource(
ADC_MODULE_ID index
);
Description
This function identifies whether the PairTriggerSource feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_PairTriggerSourceSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PairTriggerSource feature is supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
5-1454
• false = The PairTriggerSource feature is not supported on the device
Remarks
None.
5.6.1.6.9.32 PLIB_ADC_ExistsResultBufferFillStatus Function
C
bool PLIB_ADC_ExistsResultBufferFillStatus(
ADC_MODULE_ID index
);
Description
This function identifies whether the ResultBufferFillStatus feature is available on the ADC module. When this function returns
true, these functions are supported on the device:
• PLIB_ADC_ResultBufferStatusGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ResultBufferFillStatus feature is supported on the device
• false = The ResultBufferFillStatus feature is not supported on the device
Remarks
None.
5.6.1.6.9.33 PLIB_ADC_ExistsResultBufferMode Function
C
bool PLIB_ADC_ExistsResultBufferMode(
ADC_MODULE_ID index
);
Description
This function identifies whether the ResultBufferMode feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_ResultBufferModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ResultBufferMode feature is supported on the device
• false = The ResultBufferMode feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
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Remarks
None.
5.6.1.6.9.34 PLIB_ADC_ExistsResultFormat Function
C
bool PLIB_ADC_ExistsResultFormat(
ADC_MODULE_ID index
);
Description
This function identifies whether the ResultFormat feature is available on the ADC module. When this function returns true, these
functions are supported on the device:
• PLIB_ADC_ResultFormatSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ResultFormat feature is supported on the device
• false = The ResultFormat feature is not supported on the device
Remarks
None.
5.6.1.6.9.35 PLIB_ADC_ExistsResultGet Function
C
bool PLIB_ADC_ExistsResultGet(
ADC_MODULE_ID index
);
Description
This function identifies whether the ResultGet feature is available on the ADC module. When this function returns true, these
functions are supported on the device:
• PLIB_ADC_ResultGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ResultGet feature is supported on the device
• false = The ResultGet feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help ADC Peripheral Library
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Remarks
None.
5.6.1.6.9.36 PLIB_ADC_ExistsResultGetByIndex Function
C
bool PLIB_ADC_ExistsResultGetByIndex(
ADC_MODULE_ID index
);
Description
This function identifies whether the ResultGetByIndex feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_ResultGetByIndex
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ResultGetByIndex feature is supported on the device
• false = The ResultGetByIndex feature is not supported on the device
Remarks
None.
5.6.1.6.9.37 PLIB_ADC_ExistsResultSign Function
C
bool PLIB_ADC_ExistsResultSign(
ADC_MODULE_ID index
);
Description
This function identifies whether the ResultSign feature is available on the ADC module. When this function returns true, these
functions are supported on the device:
• PLIB_ADC_ResultSignGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ResultSign feature is supported on the device
• false = The ResultSign feature is not supported on the device
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Remarks
None.
5.6.1.6.9.38 PLIB_ADC_ExistsResultSize Function
C
bool PLIB_ADC_ExistsResultSize(
ADC_MODULE_ID index
);
Description
This function identifies whether the ResultSize feature is available on the ADC module. When this function returns true, these
functions are supported on the device:
• PLIB_ADC_ResultSizeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ResultSize feature is supported on the device
• false = The ResultSize feature is not supported on the device
Remarks
None.
5.6.1.6.9.39 PLIB_ADC_ExistsSampleResolution Function
C
bool PLIB_ADC_ExistsSampleResolution(
ADC_MODULE_ID index
);
Description
This function identifies whether the SampleResolution feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_SampleMaxGet
• PLIB_ADC_SampleMinGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The SampleResolution feature is supported on the device
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• false = The SampleResolution feature is not supported on the device
Remarks
None.
5.6.1.6.9.40 PLIB_ADC_ExistsSamplesPerInterruptSelect Function
C
bool PLIB_ADC_ExistsSamplesPerInterruptSelect(
ADC_MODULE_ID index
);
Description
This function identifies whether the SamplesPerInterruptSelect feature is available on the ADC module. When this function
returns true, these functions are supported on the device:
• PLIB_ADC_SamplesPerInterruptSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The SamplesPerInterruptSelect feature is supported on the device
• false = The SamplesPerInterruptSelect feature is not supported on the device
Remarks
None.
5.6.1.6.9.41 PLIB_ADC_ExistsSamplingAcquisitionTime Function
C
bool PLIB_ADC_ExistsSamplingAcquisitionTime(
ADC_MODULE_ID index
);
Description
This function identifies whether the SamplingAcquisitionTime feature is available on the ADC module. When this function returns
true, these functions are supported on the device:
• PLIB_ADC_SampleAcqusitionTimeSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The SamplingAcquisitionTime feature is supported on the device
• false = The SamplingAcquisitionTime feature is not supported on the device
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Remarks
None.
5.6.1.6.9.42 PLIB_ADC_ExistsSamplingAutoStart Function
C
bool PLIB_ADC_ExistsSamplingAutoStart(
ADC_MODULE_ID index
);
Description
This function identifies whether the SamplingAutoStart feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_SampleAutoStartEnable
• PLIB_ADC_SampleAutoStartDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The SamplingAutoStart feature is supported on the device
• false = The SamplingAutoStart feature is not supported on the device
Remarks
None.
5.6.1.6.9.43 PLIB_ADC_ExistsSamplingControl Function
C
bool PLIB_ADC_ExistsSamplingControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the SamplingControl feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_SamplingStart
• PLIB_ADC_SamplingStop
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true = The SamplingControl feature is supported on the device
• false = The SamplingControl feature is not supported on the device
Remarks
None.
5.6.1.6.9.44 PLIB_ADC_ExistsSamplingModeControl Function
C
bool PLIB_ADC_ExistsSamplingModeControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the SamplingModeControl feature is available on the ADC module. When this function returns
true, these functions are supported on the device:
• PLIB_ADC_SamplingModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The SamplingModeControl feature is supported on the device
• false = The SamplingModeControl feature is not supported on the device
Remarks
None.
5.6.1.6.9.45 PLIB_ADC_ExistsSamplingStatus Function
C
bool PLIB_ADC_ExistsSamplingStatus(
ADC_MODULE_ID index
);
Description
This function identifies whether the SamplingStatus feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_SamplingIsActive
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true = The SamplingStatus feature is supported on the device
• false = The SamplingStatus feature is not supported on the device
Remarks
None.
5.6.1.6.9.46 PLIB_ADC_ExistsStopInIdleControl Function
C
bool PLIB_ADC_ExistsStopInIdleControl(
ADC_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the ADC module. When this function returns true, these
functions are supported on the device:
• PLIB_ADC_StopInIdleEnable
• PLIB_ADC_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The StopInIdle feature is supported on the device
• false = The StopInIdle feature is not supported on the device
Remarks
None.
5.6.1.6.9.47 PLIB_ADC_ExistsVoltageReference Function
C
bool PLIB_ADC_ExistsVoltageReference(
ADC_MODULE_ID index
);
Description
This function identifies whether the VoltageReference feature is available on the ADC module. When this function returns true,
these functions are supported on the device:
• PLIB_ADC_VoltageReferenceSelect
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The VoltageReference feature is supported on the device
• false = The VoltageReference feature is not supported on the device
Remarks
None.
5.6.1.6.10 Mux Selection and Channel Scan
5.6.1.6.10.1 PLIB_ADC_MuxAInputScanDisable Function
C
void PLIB_ADC_MuxAInputScanDisable(
ADC_MODULE_ID index
);
Description
This function disables scan input for CH0+ of MUX A.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsMuxInputScanControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_MuxAInputScanDisable(MY_ADC_INSTANCE);
5.6.1.6.10.2 PLIB_ADC_MuxAInputScanEnable Function
C
void PLIB_ADC_MuxAInputScanEnable(
ADC_MODULE_ID index
);
Description
This function enables scan input for CH0+ of MUX A.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsMuxInputScanControl in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_MuxAInputScanEnable(MY_ADC_INSTANCE);
5.6.1.6.10.3 PLIB_ADC_MuxChannel0InputNegativeSelect Function
C
void PLIB_ADC_MuxChannel0InputNegativeSelect(
ADC_MODULE_ID index,
ADC_MUX muxType,
ADC_INPUTS_NEGATIVE input
);
Description
This function selects the negative input for channel 0 of MUX A or MUX B.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
muxType One of the possible values from ADC_MUX
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsMuxChannel0NegativeInput in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_MuxChannel0InputNegativeSelect(MY_ADC_INSTANCE, ADC_MUX_A,
ADC_INPUT_NEGATIVE_VREF_MINUS);
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5.6.1.6.10.4 PLIB_ADC_MuxChannel0InputPositiveSelect Function
C
void PLIB_ADC_MuxChannel0InputPositiveSelect(
ADC_MODULE_ID index,
ADC_MUX muxType,
ADC_INPUTS_POSITIVE input
);
Description
This function selects the positive input for channel 0 of MUX A or MUX B.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
muxType One of the possible values from ADC_MUX
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsMuxChannel0PositiveInput in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_MuxChannel0InputPositiveSelect(MY_ADC_INSTANCE, ADC_MUX_A, ADC_INPUT_POSITIVE_AN2);
5.6.1.6.10.5 PLIB_ADC_MuxChannel123InputNegativeSelect Function
C
void PLIB_ADC_MuxChannel123InputNegativeSelect(
ADC_MODULE_ID index,
ADC_MUX muxType,
ADC_CHANNEL123_INPUTS_NEG input
);
Description
This function selects the negative input for channels 1, 2, and 3 of MUX A or MUX B.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
muxType One of the possible values from ADC_MUX
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsMuxChannel123NegativeInput in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_MuxChannel123InputNegativeSelect(MY_ADC_INSTANCE, ADC_MUX_A,
ADC_CHANNEL123_INPUT_NEG_CH123_VREF_MINUS);
5.6.1.6.10.6 PLIB_ADC_MuxChannel123InputPositiveSelect Function
C
void PLIB_ADC_MuxChannel123InputPositiveSelect(
ADC_MODULE_ID index,
ADC_MUX muxType,
ADC_CHANNEL123_INPUTS_POS input
);
Description
This function selects the positive input for channels 1, 2, and 3 of MUX A or MUX B.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
muxType One of the possible values from ADC_MUX
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_ADC_ExistsMuxChannel123PositiveInput in your application to determine whether this feature is available.
Example
// Where MY_ADC_INSTANCE, is the ADC instance selected for use by the
// application developer.
PLIB_ADC_MuxChannel123InputPositiveSelect(MY_ADC_INSTANCE, ADC_MUX_A,
ADC_CHANNEL123_INPUT_POS_CH1_AN0_CH2_AN1_CH3_AN2);
5.6.1.7 Files
Files
Name Description
plib_adc.h ADC PLIB interface header for definitions common to the ADC peripheral.
Description
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5.6.1.7.1 plib_adc.h
ADC Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
ADC PLIB for all families of Microchip microcontrollers. The definitions in this file are common to the ADC peripheral.
Functions
Name Description
PLIB_ADC_AsynchronousDedicatedSamplingDisable Disables asynchronous dedicated S&H sampling.
PLIB_ADC_AsynchronousDedicatedSamplingEnable Enables asynchronous dedicated S&H sampling.
PLIB_ADC_CalibrationDisable Normal ADC module operation (no calibration is performed).
PLIB_ADC_CalibrationEnable Calibration is performed on the next ADC conversion.
PLIB_ADC_ChannelGroupSelect Selects channels to be utilized.
PLIB_ADC_ConversionClockGet Obtains the conversion clock.
PLIB_ADC_ConversionClockSet Sets the ADC module conversion clock.
PLIB_ADC_ConversionClockSourceSelect Selects the ADC module conversion clock source.
PLIB_ADC_ConversionHasCompleted Provides the conversion completion status of the ADC.
PLIB_ADC_ConversionOrderSelect Selects the conversion order.
PLIB_ADC_ConversionStart Starts ADC module manual conversion process.
PLIB_ADC_ConversionStopSequenceDisable Normal conversion sequence.
PLIB_ADC_ConversionStopSequenceEnable Stop conversion sequence (when the first ADC module
interrupt is generated).
PLIB_ADC_ConversionTriggerGroupSelect Selects the conversion trigger source group.
PLIB_ADC_ConversionTriggerSourceSelect Selects the conversion trigger source.
PLIB_ADC_Disable ADC module is disabled (turned OFF).
PLIB_ADC_DMAAddressIncrementSelect Selects the increment rate for the DMA address.
PLIB_ADC_DMABufferModeSelect DMA Buffer Build mode.
PLIB_ADC_DMADisable Disables the ADC Direct Memory Access (DMA).
PLIB_ADC_DMAEnable Enables the ADC Direct Memory Access (DMA).
PLIB_ADC_DMAInputBufferSelect Selects the number of DMA buffer locations per analog
input.
PLIB_ADC_Enable ADC module is enabled (turned ON).
PLIB_ADC_ExistsAsynchronousDedicatedSampling Identifies whether the AsynchronousDedicatedSampling
feature exists on the ADC module
PLIB_ADC_ExistsCalibrationControl Identifies whether the CalibrationControl feature exists on
the ADC module
PLIB_ADC_ExistsChannelGroup Identifies whether the ChannelGroup feature exists on the
ADC module
PLIB_ADC_ExistsConversionClock Identifies whether the ConversionClock feature exists on the
ADC module
PLIB_ADC_ExistsConversionClockSource Identifies whether the ConversionClockSource feature
exists on the ADC module
PLIB_ADC_ExistsConversionControl Identifies whether the ConversionControl feature exists on
the ADC module
PLIB_ADC_ExistsConversionOrder Identifies whether the ConversionOrder feature exists on the
ADC module
PLIB_ADC_ExistsConversionStatus Identifies whether the ConversionStatus feature exists on
the ADC module
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PLIB_ADC_ExistsConversionStopSequenceControl Identifies whether the ConversionStopSequenceControl
feature exists on the ADC module
PLIB_ADC_ExistsConversionTriggerGroup Identifies whether the ConversionTriggerGroup feature
exists on the ADC module
PLIB_ADC_ExistsConversionTriggerSource Identifies whether the ConversionTriggerSource feature
exists on the ADC module
PLIB_ADC_ExistsDMAAddressIncrement Identifies whether the DMAAddressIncrement feature exists
on the ADC module
PLIB_ADC_ExistsDMABufferMode Identifies whether the DMABufferMode feature exists on the
ADC module
PLIB_ADC_ExistsDMABuffersPerAnalogInput Identifies whether the DMABuffersPerInput feature exists on
the ADC module
PLIB_ADC_ExistsDMAControl Identifies whether the DMAControl feature exists on the
ADC module
PLIB_ADC_ExistsEnableControl Identifies whether the EnableControl feature exists on the
ADC module.
PLIB_ADC_ExistsGlobalSoftwareTrigger Identifies whether the GlobalSoftwareTrigger feature exists
on the ADC module
PLIB_ADC_ExistsInputSelect Identifies whether the InputSelect feature exists on the ADC
module
PLIB_ADC_ExistsInternalReferenceChannelControl Identifies whether the InternalReferenceChannelControl
feature exists on the ADC module
PLIB_ADC_ExistsISRJumpTableBaseAddress Identifies whether the ISRJumpTableBaseAddress feature
exists on the ADC module
PLIB_ADC_ExistsMuxChannel0NegativeInput Identifies whether the MuxChannel0NegativeInput feature
exists on the ADC module
PLIB_ADC_ExistsMuxChannel0PositiveInput Identifies whether the MuxChannel0PositiveInput feature
exists on the ADC module
PLIB_ADC_ExistsMuxChannel123NegativeInput Identifies whether the MuxChannel123NegativeInput feature
exists on the ADC module
PLIB_ADC_ExistsMuxChannel123PositiveInput Identifies whether the MuxChannel123PositiveInput feature
exists on the ADC module
PLIB_ADC_ExistsMuxInputScanControl Identifies whether the MuxInputScanControl feature exists
on the ADC module
PLIB_ADC_ExistsMuxInputScanSelect Identifies whether the MuxInputScanSelect feature exists on
the ADC module
PLIB_ADC_ExistsPairConversionControl Identifies whether the PairConversionControl feature exists
on the ADC module
PLIB_ADC_ExistsPairInterruptOnConversion Identifies whether the PairInterruptOnConversion feature
exists on the ADC module
PLIB_ADC_ExistsPairInterruptRequest Identifies whether the PairInterruptRequest feature exists on
the ADC module
PLIB_ADC_ExistsPairSampleStatus Identifies whether the PairSampleStatus feature exists on
the ADC module
PLIB_ADC_ExistsPairTriggerSource Identifies whether the PairTriggerSource feature exists on
the ADC module
PLIB_ADC_ExistsResultBufferFillStatus Identifies whether the ResultBufferFillStatus feature exists
on the ADC module
PLIB_ADC_ExistsResultBufferMode Identifies whether the ResultBufferMode feature exists on
the ADC module
PLIB_ADC_ExistsResultFormat Identifies whether the ResultFormat feature exists on the
ADC module
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PLIB_ADC_ExistsResultGet Identifies whether the ResultGet feature exists on the ADC
module
PLIB_ADC_ExistsResultGetByIndex Identifies whether the ResultGetByIndex feature exists on
the ADC module
PLIB_ADC_ExistsResultSign Identifies whether the ResultSign feature exists on the ADC
module
PLIB_ADC_ExistsResultSize Identifies whether the ResultSize feature exists on the ADC
module
PLIB_ADC_ExistsSampleResolution Identifies whether the SampleResolution feature exists on
the ADC module
PLIB_ADC_ExistsSamplesPerInterruptSelect Identifies whether the SamplesPerInterruptSelect feature
exists on the ADC module
PLIB_ADC_ExistsSamplingAcquisitionTime Identifies whether the SamplingAcquisitionTime feature
exists on the ADC module
PLIB_ADC_ExistsSamplingAutoStart Identifies whether the SamplingAutoStart feature exists on
the ADC module
PLIB_ADC_ExistsSamplingControl Identifies whether the SamplingControl feature exists on the
ADC module
PLIB_ADC_ExistsSamplingModeControl Identifies whether the SamplingModeControl feature exists
on the ADC module
PLIB_ADC_ExistsSamplingStatus Identifies whether the SamplingStatus feature exists on the
ADC module
PLIB_ADC_ExistsStopInIdleControl Identifies whether the StopInIdle feature exists on the ADC
module
PLIB_ADC_ExistsVoltageReference Identifies whether the VoltageReference feature exists on
the ADC module
PLIB_ADC_GlobalSoftwareTriggerSet Global software trigger enable/set control.
PLIB_ADC_InputScanMaskAdd Select ADC analog channel for input scan.
PLIB_ADC_InputScanMaskRemove Omits ADC analog channel for input scan.
PLIB_ADC_InputSelectNegative Analog negative channel selection.
PLIB_ADC_InputSelectPositive Positive analog input channel selection.
PLIB_ADC_InternalReferenceChannelDisable Internal reference input is disabled.
PLIB_ADC_InternalReferenceChannelEnable Internal reference input is enabled.
PLIB_ADC_IsrJumpTableBaseAddressGet Gets the base address of the user's ADC Interrupt Service
Routine (ISR) jump table.
PLIB_ADC_IsrJumpTableBaseAddressSet Sets the base address of the user's ADC Interrupt Service
Routine (ISR) jump table.
PLIB_ADC_MuxAInputScanDisable Do not scan input selections for CH0+ of MUX A.
PLIB_ADC_MuxAInputScanEnable Scan input selections for CH0+ of MUX A.
PLIB_ADC_MuxChannel0InputNegativeSelect Channel 0 negative input select for multiplexer setting.
PLIB_ADC_MuxChannel0InputPositiveSelect Channel 0 positive input select for multiplexer setting.
PLIB_ADC_MuxChannel123InputNegativeSelect Channel 1, 2, and 3 negative input select.
PLIB_ADC_MuxChannel123InputPositiveSelect Channel 1, 2, and 3 positive input select.
PLIB_ADC_PairConversionIsPending Informs whether conversion is pending or complete.
PLIB_ADC_PairConversionStart Start conversion of the requested ADC pair.
PLIB_ADC_PairInterruptAfterFirstConversion ADC pair conversion interrupt is generated after the first
conversion.
PLIB_ADC_PairInterruptAfterSecondConversion ADC pair conversion interrupt is generated after the second
conversion.
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PLIB_ADC_PairInterruptRequestDisable Disable IRQ generation for the ADC pair.
PLIB_ADC_PairInterruptRequestEnable Enable IRQ generation for the ADC pair.
PLIB_ADC_PairSampleIsAvailable Provides status of the ADC pair sample availability in the
buffer.
PLIB_ADC_PairSampleStatusClear Clears the ADC pair ready status flag.
PLIB_ADC_PairTriggerSourceSelect Selects trigger source for the requested ADC pair.
PLIB_ADC_ResultBufferModeSelect Selects the result buffer mode.
PLIB_ADC_ResultBufferStatusGet Provides the buffer fill status.
PLIB_ADC_ResultFormatSelect Selects the result format.
PLIB_ADC_ResultGet Obtains the ADC sample/result value.
PLIB_ADC_ResultGetByIndex Provides the ADC conversion result based on the buffer
index.
PLIB_ADC_ResultSignGet Obtains the ADC result sign.
PLIB_ADC_ResultSizeSelect Selects the ADC module mode/result size.
PLIB_ADC_SampleAcqusitionTimeSet Sets the ADC acquisition/auto-sample time in TADs.
PLIB_ADC_SampleAutoStartDisable Sampling auto-start is disabled.
PLIB_ADC_SampleAutoStartEnable Sampling auto-start is enabled.
PLIB_ADC_SampleMaxGet Provides the maximum sample value.
PLIB_ADC_SampleMinGet Provides the minimum sample value.
PLIB_ADC_SamplesPerInterruptSelect Interrupts at the completion of conversion for each nth
sample.
PLIB_ADC_SamplingIsActive Provides the ADC sampling status.
PLIB_ADC_SamplingModeSelect Enable the selected sampling mode.
PLIB_ADC_SamplingStart Sampling is enabled.
PLIB_ADC_SamplingStop Holding is enabled.
PLIB_ADC_StopInIdleDisable Continue ADC module operation when the device is in Idle
mode.
PLIB_ADC_StopInIdleEnable Discontinue ADC module operation when device enters Idle
mode.
PLIB_ADC_VoltageReferenceSelect Voltage reference configuration.
Types
Name Description
ADC_ACQUISITION_TIME Data type defining the different ADC acquisition times by which the ADC can be
configured.
ADC_CONVERSION_CLOCK Data type defines the different ADC Conversion clock
ADC_SAMPLE Data type defining the size of the adc sample register.
File Name
plib_adc.h
Company
Microchip Technology Inc.
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5.6.2 ADCP Peripheral Library
This topic describes the Pipelined Analog-to-Digital Converter peripheral library interface.
Description
This section contains the list of topics.
5.6.2.1 Introduction
Pipelined Analog-to-Digital Converter Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Pipelined Analog-to-Digital Converter (ADCP) Peripheral Library that is
available on the Microchip family of microcontrollers with a convenient C language interface. It can be used to simplify low-level
access to the module without the necessity of interacting directly with the module's registers, there by hiding differences from
one microcontroller variant to another.
Description
The Pipelined Analog-to-Digital Converter (ADCP) peripheral is used to convert an analog input into a digital number that
represents that input voltage. When the input is periodically converted, the result is a sequence of digital values that have
converted a continuous-time and continuous-amplitude analog signal to a discrete-time and discrete-amplitude digital signal.
This particular ADC architecture is pipelined allowing it to simultaneously convert up to 6 samples, each at a different stage of
conversion resulting in a low overall latency of multiple sampled inputs.
The structure of the ADCP is shown in the diagram below.
1. Analog input pins connect to the sample and hold (S&H) circuits. These circuits capture the analog signal so that it can be
passed to the pipeline converter.
2. The S&H circuits are controlled by predefined trigger sources. These trigger sources switch the sample and hold circuit to hold
and queue the conversion of the sample.
3. Channel scan is available which allows a single trigger to start a sample/conversion sequence of multiple analog inputs using
a predefined scan list.
4. A conversion clock is required for the pipeline converter. This clock determines the conversion speed and latency and effects
power consumption.
5. A voltage reference is required for the pipeline converter. This voltage reference determines allowable input range of the
analog signal.
6. Result registers store the conversion results and can be read by the software application. Software is notified of ready results
by either polling or through the use of interrupts.
7. Optional Oversampling Digital Filters can be used to provide increased measurement accuracy at the sacrifice of sample rate.
Software is notified of ready oversampling results by either polling or through the use of interrupts.
8. Optional digital comparators can be used to test conversion results independent of software and generate interrupts based on
predefined conditions.
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5.6.2.2 Release Notes
MPLAB Harmony Version: v0.70b ADCP Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.2.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.2.4 Using the Library
This topic describes the basic architecture of the Pipelined Analog-to-Digital Converter (ADCP) Peripheral Library and provides
information and examples on how to use it.
Interface Header File: plib_adcp.h
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The interface to the ADCP Peripheral library is defined in the "plib_adcp.h" header file. This file is included by the "peripheral.h"
file. Any C language source (.c) file that uses the Pipelined Analog to Digital Converter (ADCP) Peripheral library should include
"peripheral.h".
Library File:
The ADCP Peripheral library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the Peripheral interacts with the framework.
5.6.2.4.1 Hardware Abstraction Model
The interface provided is a super set of all the functionality of the available Pipelined Analog-to-Digital Converter (ADCP) on the
device. Refer to the specific device data sheet or related family reference manual section to determine the set of functions that
are supported for each ADCP module on the device.
This library provides the low-level abstraction of the ADCP module on the Microchip family of microcontrollers with a convenient
C language interface. This topic describes how that abstraction is modeled in the software and introduces the library interface.
Description
Pipelined Analog-to-Digital Converter (ADCP) Software Abstraction Block Diagram
5.6.2.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the ADCP module.
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Library Interface Section Description
Interface Routines - Configuration These library functions are used to configure the ADC, enable and disable
it, initiate a calibration and manage low power states.
Interface Routines - Status These library functions return status information related to the ADC.
Interface Routines - Input Selection These library functions select and configure the ANx inputs to the ADC.
Interface Routines - Channel Scan These library functions are used to configure the channel scan feature.
Interface Routines - Triggering These library functions are used to configure and initiate conversion
triggers.
Interface Routines - Analog Input Conversion
Results
These library function are used to retrieve individual conversion results for
ANx pins.
Interface Routines - Digital Comparator These library functions are used to configure and query the digital
comparators.
Interface Routines - Oversampling Digital Filter These library functions are used to configure the Oversampling Digital Filter
and fetch results from it.
5.6.2.4.3 How the Library Works
Core Functionality
Name Description
Example - Simultaneous Sampling Three
Class 1 Inputs
Simultaneous sampling is used when the application requires capture of more
than one signal at the same instance of time. Simultaneous sampling requires the
use of multiple Class 1 inputs where each is assigned the same trigger source.
The following example illustrates simultaneous sampling of AN0, AN1 and AN2
using the global software trigger as the trigger source. The dedicated sample and
holds (S&Hs) are configured for single-ended input and a unipolar (unsigned)
output. No interrupts are used so the results are polled for ready status.
Example - Channel Scanning Channel scanning is used in applications where precise timing of the sample to an
external source is not needed. Channel scanning allows a large number of analog
inputs to be sampled and converted in sequence each time a single trigger occurs.
The following example illustrates how to configure channel scanning of multiple
Class 2 and Class 3 inputs using the shared S&H. This example uses inputs AN5,
AN11 - AN14. AN5 and AN11 are Class 2 inputs. AN13 and AN 14 are Class 3
inputs. The global software trigger is used to initiate the scan. A 4 TAD sample
time... more
Other Functionality
Name Description
Example - Digital Oversampling Filter The Digital Oversampling filter can be used to increase resolution of the
conversion result at the expense of throughput. The example below shows how
two extra bits of resolution can be obtained using 16X oversampling (sixteen
samples are used to create one higher resolution result). AN0 is used for the input.
The sampling time for the retriggers is set to 3.5 TAD.
Example:
Example - Digital Comparator The Digital Comparator is used to automatically evaluate results as they are
output by the converter. The following example illustrates an automated
test of AN5 for values >= 80% of full scale or < 20% of full scale. A count is
incremented each time an event occurs.
Example:
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Description
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes.
5.6.2.4.3.1 Core Functionality
5.6.2.4.3.1.1 Example - Simultaneous Sampling Three Class 1 Inputs
Simultaneous sampling is used when the application requires capture of more than one signal at the same instance of time.
Simultaneous sampling requires the use of multiple Class 1 inputs where each is assigned the same trigger source. The
following example illustrates simultaneous sampling of AN0, AN1 and AN2 using the global software trigger as the trigger
source. The dedicated sample and holds (S&Hs) are configured for single-ended input and a unipolar (unsigned) output. No
interrupts are used so the results are polled for ready status.
Example:
int32_t results[3] ; // storage for results
// This structure is used to simplify testing for a ready channel
AN_READY anReady ;
// Configure the ADC
// AVdd/AVss reference, ADC clock is system clock (SYSCLK) divided by 8
// No need to specify sample time for class 2/3 inputs or oversampling
// sample time as Class 2/3 inputs and oversampling is not used.
PLIB_ADCP_Configure ( ADCP_ID_1 ,
ADCP_VREF_AVDD_AVSS , // AVdd and AVss as reference
FALSE , // No VREF boost
FALSE , // Do not use fractional format
FALSE , // Do not stop in idle
ADCP_CLK_SRC_SYSCLK , // SYSCLK is the clock source
4 , // TAD = 1/SYSCLK * 2 * 4
// or ADC Clock = SYSCLK / (2 * 4)
0 , // Oversampling is not used.
0 , // No early interrupt.
0 ); // No class 2 or 3 channels are used
// Set up the triggers
// Configure AN0 for triggering from software.
PLIB_ADCP_Class12TriggerConfigure ( ADCP_ID_1 ,
ADCP_CLASS12_AN0 ,
ADCP_TRG_SRC_SOFTWARE ) ;
// Configure AN1 for triggering from software.
PLIB_ADCP_Class12TriggerConfigure ( ADCP_ID_1 ,
ADCP_CLASS12_AN1 ,
ADCP_TRG_SRC_SOFTWARE ) ;
// Configure AN2 for triggering from software.
PLIB_ADCP_Class12TriggerConfigure ( ADCP_ID_1 ,
ADCP_CLASS12_AN2 ,
ADCP_TRG_SRC_SOFTWARE ) ;
// Set S&H modes
PLIB_ADCP_SHModeSelect ( ADCP_ID_1 , ADCP_SH0 , ADCP_SH_MODE_SINGLE_ENDED_UNIPOLAR ) ;
PLIB_ADCP_SHModeSelect ( ADCP_ID_1 , ADCP_SH1 , ADCP_SH_MODE_SINGLE_ENDED_UNIPOLAR ) ;
PLIB_ADCP_SHModeSelect ( ADCP_ID_1 , ADCP_SH2 , ADCP_SH_MODE_SINGLE_ENDED_UNIPOLAR ) ;
// Enable the ADC Module
PLIB_ADCP_Enable ( ADCP_ID_1 ) ;
// Wait for a ready status
while (!PLIB_ADCP_ModuleIsReady ( ADCP_ID_1 )) ;
while (1)
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{
// Initiate a trigger
PLIB_ADCP_GlobalSoftwareTrigger ( ADCP_ID_1 ) ;
// Wait for a data results to be ready
// if lowest priority channel is done then all are done.
do
{
anReady = PLIB_ADCP_ResultReady ( ADCP_ID_1 ) ;
}
while (anReady.AN2 == 0) ;
// fetch AN0
if (anReady.AN0 == 1)
results[0] = PLIB_ADCP_ResultGet ( ADCP_ID_1 , ADCP_AN0 ) ;
// fetch AN1
if (anReady.AN1 == 1)
results[1] = PLIB_ADCP_ResultGet ( ADCP_ID_1 , ADCP_AN1 ) ;
// fetch AN2
if (anReady.AN2 == 1)
results[2] = PLIB_ADCP_ResultGet ( ADCP_ID_1 , ADCP_AN2 ) ;
}
5.6.2.4.3.1.2 Example - Channel Scanning
Channel scanning is used in applications where precise timing of the sample to an external source is not needed. Channel
scanning allows a large number of analog inputs to be sampled and converted in sequence each time a single trigger occurs.
The following example illustrates how to configure channel scanning of multiple Class 2 and Class 3 inputs using the shared
S&H. This example uses inputs AN5, AN11 - AN14. AN5 and AN11 are Class 2 inputs. AN13 and AN 14 are Class 3 inputs. The
global software trigger is used to initiate the scan. A 4 TAD sample time is specified for the shared S&H. The shared S&H is
configured for single-ended operation and a unipolar output. No interrupts are used so the results are polled for ready status.
Example:
int32_t results[5] ; // storage for results
// This structure is used to simplify testing of the ready status
AN_READY anReady ;
// This structure is used to simplify specifying channels for scan
// AN5, AN11, AN12, AN13 and AN14 are selected for scanning.
AN_SELECT anSelect ;
anSelect.highWord = 0 ;
anSelect.lowWord = 0 ;
anSelect.AN5 = 1 ;
anSelect.AN11 = 1 ;
anSelect.AN12 = 1 ;
anSelect.AN13 = 1 ;
anSelect.AN14 = 1 ;
// Configure the ADC
// AVdd/AVss reference, ADC clock is system clock (SYSCLK) divided by 8
// The sample for the shared S&H must be adequate for all inputs.
// In this example it is set to 4 TAD.
// No need to specify sample time for oversampling as it is not used.
PLIB_ADCP_Configure ( ADCP_ID_1 ,
ADCP_VREF_AVDD_AVSS , // AVdd and AVss as reference
FALSE , // No VREF boost
FALSE , // Do not use fractional format
FALSE , // Do not stop in idle
ADCP_CLK_SRC_SYSCLK , // SYSCLK is the clock source
4 , // TAD = 1/SYSCLK * 2 * 4
// or ADC Clock = SYSCLK / (2 * 4)
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0 , // Oversampling is not used.
0 , // No early interrupt.
3 ) ; // 3 + 1 = 4 TAD for Class 2 and 3
// Sample Time.
// Specify the inputs to include in the Channel Scan using the selections made when
// initializing anSelect. Use the software trigger to initiate the scan.
PLIB_ADCP_ChannelScanConfigure ( ADCP_ID_1 ,
anSelect.lowWord , anSelect.highWord ,
ADCP_SCAN_TRG_SRC_SOFTWARE ) ;
// Set S&H 5 (shared S&H) to use the single ended, unipolar mode
PLIB_ADCP_SHModeSelect ( ADCP_ID_1 , ADCP_SH5 , ADCP_SH_MODE_SINGLE_ENDED_UNIPOLAR ) ;
// Enable the ADC Module
PLIB_ADCP_Enable ( ADCP_ID_1 ) ;
// Wait for a ready status
while (!PLIB_ADCP_ModuleIsReady ( ADCP_ID_1 )) ;
while (1)
{
// Initiate a trigger
PLIB_ADCP_GlobalSoftwareTrigger ( ADCP_ID_1 ) ;
// Wait for a data results to be ready
// if lowest priority channel is done then all are done.
do
{
anReady = PLIB_ADCP_ResultReady ( ADCP_ID_1 ) ;
}
while (anReady.AN14 == 0) ;
// fetch AN5
if (anReady.AN5 == 1)
results[0] = PLIB_ADCP_ResultGet ( ADCP_ID_1 , ADCP_AN5 ) ;
// fetch AN11
if (anReady.AN11 == 1)
results[1] = PLIB_ADCP_ResultGet ( ADCP_ID_1 , ADCP_AN11 ) ;
// fetch AN12
if (anReady.AN12 == 1)
results[2] = PLIB_ADCP_ResultGet ( ADCP_ID_1 , ADCP_AN12 ) ;
// fetch AN13
if (anReady.AN13 == 1)
results[3] = PLIB_ADCP_ResultGet ( ADCP_ID_1 , ADCP_AN13 ) ;
// fetch AN14
if (anReady.AN14 == 1)
results[4] = PLIB_ADCP_ResultGet ( ADCP_ID_1 , ADCP_AN14 ) ;
}
5.6.2.4.3.2 Other Functionality
5.6.2.4.3.2.1 Example - Digital Oversampling Filter
The Digital Oversampling filter can be used to increase resolution of the conversion result at the expense of throughput. The
example below shows how two extra bits of resolution can be obtained using 16X oversampling (sixteen samples are used to
create one higher resolution result). AN0 is used for the input. The sampling time for the retriggers is set to 3.5 TAD.
Example:
int32_t result; // storage for result
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// Configure the ADC
// AVdd/AVss reference, ADC clock is system clock (SYSCLK) divided by 8
// No need to specify sample time for Class 2/3 inputs as they are not used.
// Oversampling sample time is set to 3.5 TAD.
PLIB_ADCP_Configure(ADCP_ID_1,
ADCP_VREF_AVDD_AVSS, // AVdd and AVss as reference
FALSE, // No VREF boost
FALSE, // Do not use fractional format
FALSE, // Do not stop in idle
ADCP_CLK_SRC_SYSCLK, // SYSCLK is the clock source
4, // TAD = 1/SYSCLK * 2 * 4
// or ADC Clock = SYSCLK / (2 * 4)
2, // 2 + 1.5 = 3.5 TAD between
// oversampling triggers
0, // No early interrupt.
0); // No Class 2 and 3 are used.
// Set up the triggers
// Configure AN0 for triggering from software.
PLIB_ADCP_Class12TriggerConfigure(ADCP_ID_1, ADCP_CLASS12_AN0, ADCP_TRG_SRC_SOFTWARE);
// Set S&H modes
// Set S&H 0 to use the single ended, unipolar mode
PLIB_ADCP_SHModeSelect(ADCP_ID_1, ADCP_SH0, ADCP_SH_MODE_SINGLE_ENDED_UNIPOLAR);
// Configure the Oversampling Filter
PLIB_ADCP_OsampDigFilterConfig(ADCP_ID_1, // ADCP module ID
ADCP_ODFLTR1, // Filter ID
ADCP_AN0, // Oversample AN0
ADCP_ODFLTR_16X, // 16 x oversampling
FALSE); // No Global Int Enable
// Enable ODFLTR0
PLIB_ADCP_OsampDigFilterEnable(ADCP_ID_1, ADCP_ODFLTR1);
// Enable the ADC Module
PLIB_ADCP_Enable(ADCP_ID_1);
// Wait for a ready status
while (!PLIB_ADCP_ModuleIsReady(ADCP_ID_1));
while (1) {
// Initiate a trigger
PLIB_ADCP_GlobalSoftwareTrigger(ADCP_ID_1);
// Wait for data to be ready
while (PLIB_ADCP_OsampDigFilterDataRdy(ADCP_ID_1, ADCP_ODFLTR1) == FALSE);
// get the result
result = PLIB_ADCP_OsampDigFilterDataGet(ADCP_ID_1, ADCP_ODFLTR1);
}
5.6.2.4.3.2.2 Example - Digital Comparator
The Digital Comparator is used to automatically evaluate results as they are output by the converter. The following example
illustrates an automated
test of AN5 for values >= 80% of full scale or < 20% of full scale. A count is incremented each time an event occurs.
Example:
int32_t result; // storage for result
int32_t count = 0;
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/* This structure is used to simplify testing for a ready channel */
AN_READY anReady;
// Configure the ADC
// AVdd/AVss reference, ADC clock is system clock (SYSCLK) divided by 8
// The sample for the shared S&H must be adequate for all inputs.
// In this example it is set to 4 TAD.
// No need to specify sample time for oversampling as it is not used.
PLIB_ADCP_Configure(ADCP_ID_1,
ADCP_VREF_AVDD_AVSS, // AVdd and AVss as reference
FALSE, // No VREF boost
FALSE, // Do not use fractional format
FALSE, // Do not stop in idle
ADCP_CLK_SRC_SYSCLK, // SYSCLK is the clock source
4, // TAD = 1/SYSCLK * 2 * 4 or
// ADC Clock = SYSCLK / (2 * 4)
0, // no oversampling
0, // No early interrupt.
3); // 3 + 1 = 4 TAD for Class 2 and 3 Sample Time.
// Set up the triggers
// Configure AN5 for triggering from software.
PLIB_ADCP_Class12TriggerConfigure(ADCP_ID_1, ADCP_CLASS12_AN5, ADCP_TRG_SRC_SOFTWARE);
// Set S&H modes
// Set S&H 5 to use the single ended, unipolar mode
PLIB_ADCP_SHModeSelect(ADCP_ID_1, ADCP_SH5, ADCP_SH_MODE_SINGLE_ENDED_UNIPOLAR);
// Configure the Digital Comparator
// Creates an event when the reading of AN5 is less than 20% or
// greater than or equal to 80% of the full scale 12-bit output.
PLIB_ADCP_DigCmpConfig(ADCP_ID_1, // ADCP module ID
ADCP_DCMP1, // Comparator ID
FALSE, // No Global Int Enable
FALSE, // no test for between low and high
TRUE, // test for greater than or equal to high
FALSE, // no test for less than high
FALSE, // no test for greater than or equal to low
TRUE, // test for less than low
1 << 5, // enable AN5 for comparison
0xFFF - (0xFFF / 5), // high limit is 80% of full scale
0xFFF / 5); // low limit is 20% of full scale
// Enable DigCmp1
PLIB_ADCP_DigCmpEnable(ADCP_ID_1, ADCP_DCMP1);
// Enable the ADC Module
PLIB_ADCP_Enable(ADCP_ID_1);
// Wait for a ready status
while (!PLIB_ADCP_ModuleIsReady(ADCP_ID_1));
while (1) {
// Initiate a trigger
PLIB_ADCP_GlobalSoftwareTrigger(ADCP_ID_1);
// wait for conversion to complete
do {
anReady = PLIB_ADCP_ResultReady(ADCP_ID_1);
} while (anReady.AN5 == 0);
// Check result and increment count if an out of range event
// occurred on digital comparator 1 for AN5
if (PLIB_ADCP_DigCmpAIdGet(ADCP_ID_1, ADCP_DCMP1) == 5) {
count++;
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}
}
5.6.2.4.4 Configuring the Library
The library is configured for the supported processor when the processor is chosen in the MPLAB IDE.
5.6.2.5 Library Interface
Data Types
Name Description
ADCP_MODULE_ID Identifies the number of ADC Modules Supported.
ADCP_VREF_SOURCE Data type defines the ADCP VREF Source Select
ADCP_CLOCK_SOURCE Data type defines the ADCP Clock Source Select
ADCP_CLASS12_INPUT_ID Type for identifying the Class 1 and Class 2 ADC Inputs
ADCP_SH_ID Identifies the S&Hs supported regardless of type.
ADCP_DSH_ID Identifies the Dedicated S&Hs supported
ADCP_SH_MODE Data type defines the available modes for the S&H
ADCP_INPUT_ID Type for identifying the available ADC Inputs
ADCP_DCMP_ID Identifies the Digital Comparators supported.
ADCP_ODFLTR_ID Identifies the Oversampling Digital Filter supported.
ADCP_ODFLTR_OSR Identifies the Oversampling Digital Filter oversampling ratios supported.
ADCP_SCAN_TRG_SRC Data type defines the ADCP Channel Scan Trigger Source Selections
ADCP_TRG_SRC Data type defines the ADCP Trigger Source Selections
AN_SELECT This union of structures is provided to simply selection of analog inputs for
inclusion in a particular function.
AN_READY This union (identical to the AN_SELECT union) is used as the return value by the
PLIB_ADCP_Result_Ready() function.
Interface Routines - Channel Scan
Name Description
PLIB_ADCP_ChannelScanConfigure Selects input to include in Channel Scan Mode
PLIB_ADCP_ExistsChannelScan Identifies whether the ChannelScan feature exists on the ADCP module
Interface Routines - Configuration
Name Description
PLIB_ADCP_Configure Configures the Pipelined ADC converter including the ADC calibration
registers.
PLIB_ADCP_Enable Enables the Pipelined ADC module
PLIB_ADCP_Disable Pipelined ADC module is disabled (turned OFF).
PLIB_ADCP_CalibrationStart Initiates Pipelined ADC Calibration.
PLIB_ADCP_LowPowerStateEnter Places the Pipelined ADC module in a low power state.
PLIB_ADCP_LowPowerStateExit Takes the Pipelined ADC module out of low power state and puts it into an
operational mode.
PLIB_ADCP_LowPowerStateGet Returns the state of the low power setting.
PLIB_ADCP_ExistsCalibration Identifies whether the Calibration feature exists on the ADCP module
PLIB_ADCP_ExistsEnableControl Identifies whether the EnableControl feature exists on the ADCP module
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PLIB_ADCP_ExistsLowPowerControl Identifies whether the LowPowerControl feature exists on the ADCP module
PLIB_ADCP_ExistsConfiguration Identifies whether the Configuration feature exists on the ADCP module
Interface Routines - Digital Comparator
Name Description
PLIB_ADCP_DigCmpEnable Enables the Digital Comparator in the Pipelined ADC module
PLIB_ADCP_DigCmpDisable Disables the Digital Comparator in the Pipelined ADC module
PLIB_ADCP_DigCmpAIdGet Returns the Analog Input ID of for the Comparator Event
PLIB_ADCP_DigCmpConfig Configures the Digital Comparator on the Pipelined ADC converter.
PLIB_ADCP_ExistsDigCmp Identifies whether the DigitalComparator feature exists on the ADCP module
Interface Routines - Individual Analog Input Conversion Results
Name Description
PLIB_ADCP_ResultReady Returns the ADC conversion result ready bits for the module.
PLIB_ADCP_ResultGet Returns a Pipelined ADC conversion result.
PLIB_ADCP_ResultReadyGrpIntConfigure Selects input to include in global interrupt.
PLIB_ADCP_ExistsConversionResults Identifies whether the ConversionResults feature exists on the ADCP
module
Interface Routines - Input Selection
Name Description
PLIB_ADCP_AlternateInputSelect Selects the alternate physical input for the specified dedicated (Class 1) S&H.
PLIB_ADCP_DefaultInputSelect Selects the default physical input for the specified dedicated (Class 1) S&H.
PLIB_ADCP_ExistsInputSelect Identifies whether the InputSelect feature exists on the ADCP module
PLIB_ADCP_ExistsModeSelect Identifies whether the ModeSelect feature exists on the ADCP module
PLIB_ADCP_SHModeSelect Selects the mode for the specified S&H.
Interface Routines - Oversampling Digital Filter
Name Description
PLIB_ADCP_OsampDigFilterEnable Enables the Oversampling Digital Filter in the Pipelined ADC module
PLIB_ADCP_OsampDigFilterDisable Disables the Oversampling Digital Filter in the Pipelined ADC module
PLIB_ADCP_OsampDigFilterDataRdy Used to determine if the Oversampling Digital Filter has data ready.
PLIB_ADCP_OsampDigFilterDataGet Used to fetch the data result from the Oversampling Digital Filter.
PLIB_ADCP_ExistsOsampDigFilter Identifies whether the OsampDigitalFilter feature exists on the ADCP
module
PLIB_ADCP_OsampDigFilterConfig Configures the Oversampling Digital Filter on the Pipelined ADC converter.
Interface Routines - Status
Name Description
PLIB_ADCP_ModuleIsReady Returns the overall ready status of the module.
PLIB_ADCP_ExistsReadyStatus Identifies whether the ReadyStatus feature exists on the ADCP module
Interface Routines - Triggering
Name Description
PLIB_ADCP_GlobalSoftwareTrigger Initiate a Global Software Trigger on the specified module.
PLIB_ADCP_IndividualTrigger Triggers an individual channel independent of the configured trigger source
PLIB_ADCP_Class12TriggerConfigure Configures a Class 1 or Class 2 Trigger Source.
PLIB_ADCP_ExistsTriggering Identifies whether the Triggering feature exists on the ADCP module
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Description
This section describes the Application Programming Interface (API) functions of the Pipelined Analog-to-Digital Converter
(ADCP) Peripheral.
Refer to each section for a detailed description.
5.6.2.5.1 Interface Routines - Configuration
5.6.2.5.1.1 PLIB_ADCP_Configure Function
C
void PLIB_ADCP_Configure(
ADCP_MODULE_ID index,
ADCP_VREF_SOURCE voltageRefSelect,
bool boostVref,
bool fractionalOutputOn,
bool stopInIdle,
ADCP_CLOCK_SOURCE adcClockSource,
int8_t adcClockDivider,
int8_t oversampleDigFilterSamTime,
int8_t earlyIntEnable,
int8_t class2and3SampleTime
);
Description
Configures all ADC parameters common to all inputs. This configuration must occur prior to enabling the ADC and therefore
must be called when the ADC is disabled.
Preconditions
The module is disabled when calling this function.
Parameters
Parameters Description
index Identifier for the ADCP instance
voltageRefSelect VREF Source Selection
boostVref Enables the VREF boost if TRUE.
Use when VREFH VREFL < .64 (AVDD - AVSS)
fractionalOutputOn sets output to a fractional format if TRUE
stopInIdle sets ADC to stop when device is in idle mode if TRUE
adcClockSource Clock source selection
adcClockDivider Clock source divider. Values range from 0 to 254.
oversampleDigFilterSamTime Sets the delay (sample time) between automatically generated oversampling filter
triggers. Values range from 0 to 31 for 1.5 TAD to 32.5 TAD respectively.
earlyIntEnable Sets the number of clocks prior to the actual arrival of data that the ADRDY bit is
set. Range is 0 to 7. Used to generate an early interrupt.
class2and3SampleTime Set the sample time for Class 2 and Class 3 inputs. Range is 0 to 255 for a
sample time of 1 to 256 respectivley.
Returns
none
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Remarks
This function must be called when the ADC is disabled.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Configure the ADC
PLIB_ADCP_Configure( MY_ADCP_INSTANCE,
ADCP_VREF_VREFP_VREFN, // VREF+ and VREF- as reference
FALSE, // No VREF boost
TRUE, // Use fractionl format
TRUE, // Do stop in idle
ADCP_CLK_SRC_SYSCLK, // SYSCLK is the clock source
3, // TAD = 1/SYSCLK * 2 * 3
// or ADC Clock = SYSCLK / (2 * 3)
2, // 2 + 1.5 = 3.5 TAD between
// oversampling triggers
0, // No early interrupt.
3 ); // 3 + 1 = 4 TAD for Class 2 and 3
// Sample Time.
// Enable the ADC
PLIB_ADCP_Enable(MY_ADCP_INSTANCE);
5.6.2.5.1.2 PLIB_ADCP_Enable Function
C
void PLIB_ADCP_Enable(
ADCP_MODULE_ID index
);
Description
This function enables (turns ON) the selected Pipelined ADC module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance to be configured
Returns
None.
Remarks
None
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
PLIB_ADCP_Enable(MY_ADCP_INSTANCE);
5.6.2.5.1.3 PLIB_ADCP_Disable Function
C
void PLIB_ADCP_Disable(
ADCP_MODULE_ID index
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);
Description
This function disables (turns OFF) the selected Pipelined ADC module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance to be configured
Returns
None.
Remarks
Not all functionality is available on all devices. Please refer to the specific device data sheet for the list of available features.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
PLIB_ADCP_Disable(MY_ADCP_INSTANCE);
5.6.2.5.1.4 PLIB_ADCP_CalibrationStart Function
C
void PLIB_ADCP_CalibrationStart(
ADCP_MODULE_ID index
);
Description
This function initiates calibration of the module. During calibration the module cannot perform conversion.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance to be configured
Returns
None.
Remarks
Calibration is complete when PLIB_ADCP_ModuleIsReady() returns a TRUE result.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
PLIB_ADCP_CalibrationStart(MY_ADCP_INSTANCE);
while (!PLIB_ADCP_ModuleIsRead(MY_ADCP_INSTANCE));
5.6.2.5.1.5 PLIB_ADCP_LowPowerStateEnter Function
C
void PLIB_ADCP_LowPowerStateEnter(
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ADCP_MODULE_ID index
);
Description
Places the Pipelined ADC module in a low power state. The feature is used in lieu of disabling the ADC when power reduction is
needed. The Pipelined ADC can come out of low power state and be operational much faster since recalibration is not required.
Preconditions
The Pipelined ADC must be enabled.
Parameters
Parameters Description
index Identifier for the ADCP instance
Returns
None.
Remarks
None.
Example
PLIB_ADCP_LowPowerStateEnter(MY_ADCP_INSTANCE);
5.6.2.5.1.6 PLIB_ADCP_LowPowerStateExit Function
C
void PLIB_ADCP_LowPowerStateExit(
ADCP_MODULE_ID index
);
Description
Takes the Pipelined ADC module out of low power state and puts it into an operational mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance
Returns
None.
Remarks
The first five conversions following the exit from ADC Low-power mode may be subject to lower accuracy than specified in the
device data sheet.
Example
PLIB_ADCP_LowPowerStateExit(MY_ADCP_INSTANCE);
5.6.2.5.1.7 PLIB_ADCP_LowPowerStateGet Function
C
bool PLIB_ADCP_LowPowerStateGet(
ADCP_MODULE_ID index
);
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Description
Returns the state of the low power setting.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance
Returns
A Boolean indicating the state of the low power setting.
Remarks
None.
Example
bool lowPowerSate = PLIB_ADCP_LowPowerStateGet(MY_ADCP_INSTANCE);
5.6.2.5.1.8 PLIB_ADCP_ExistsCalibration Function
C
bool PLIB_ADCP_ExistsCalibration(
ADCP_MODULE_ID index
);
Description
This function identifies whether the Calibration feature is available on the ADCP module. When this function returns true, these
functions are supported on the device:
• PLIB_ADCP_CalibrationStart
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the Calibration feature:
• true - When Calibration feature is supported on the device
• false - When Calibration feature is not supported on the device
Remarks
None.
5.6.2.5.1.9 PLIB_ADCP_ExistsEnableControl Function
C
bool PLIB_ADCP_ExistsEnableControl(
ADCP_MODULE_ID index
);
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Description
This function identifies whether the EnableControl feature is available on the ADCP module. When this function returns true,
these functions are supported on the device:
• PLIB_ADCP_Enable
• PLIB_ADCP_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the EnableControl feature:
• true - When EnableControl feature is supported on the device
• false - When EnableControl feature is not supported on the device
Remarks
None.
5.6.2.5.1.10 PLIB_ADCP_ExistsLowPowerControl Function
C
bool PLIB_ADCP_ExistsLowPowerControl(
ADCP_MODULE_ID index
);
Description
This function identifies whether the LowPowerControl feature is available on the ADCP module. When this function returns true,
these functions are supported on the device:
• PLIB_ADCP_LowPowerStateEnter
• PLIB_ADCP_LowPowerStateExit
• PLIB_ADCP_LowPowerStateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the LowPowerControl feature:
• true - When LowPowerControl feature is supported on the device
• false - When LowPowerControl feature is not supported on the device
Remarks
None.
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5.6.2.5.1.11 PLIB_ADCP_ExistsConfiguration Function
C
bool PLIB_ADCP_ExistsConfiguration(
ADCP_MODULE_ID index
);
Description
This function identifies whether the Configuration feature is available on the ADCP module. When this function returns true,
these functions are supported on the device:
• PLIB_ADCP_Configure
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the Configuration feature:
• true - When Configuration feature is supported on the device
• false - When Configuration feature is not supported on the device
Remarks
None.
5.6.2.5.2 Interface Routines - Status
5.6.2.5.2.1 PLIB_ADCP_ModuleIsReady Function
C
bool PLIB_ADCP_ModuleIsReady(
ADCP_MODULE_ID index
);
Description
Returns the ready status of the Pipelined ADC. The ADC must be ready before operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance
Returns
boolean indicating ready status.
Remarks
None.
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Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Enable the module
PLIB_ADCP_Enable(MY_ADCP_INSTANCE);
// wait for calibration to complete
while (!PLIB_ADCP_ModuleIsReady(MY_ADCP_INSTANCE));
// begin sampling
...
5.6.2.5.2.2 PLIB_ADCP_ExistsReadyStatus Function
C
bool PLIB_ADCP_ExistsReadyStatus(
ADCP_MODULE_ID index
);
Description
This function identifies whether the ReadyStatus feature is available on the ADCP module. When this function returns true, these
functions are supported on the device:
• PLIB_ADCP_ModuleIsReady
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the ReadyStatus feature:
• true - When ReadyStatus feature is supported on the device
• false - When ReadyStatus feature is not supported on the device
Remarks
None.
5.6.2.5.3 Interface Routines - Input Selection
5.6.2.5.3.1 PLIB_ADCP_AlternateInputSelect Function
C
void PLIB_ADCP_AlternateInputSelect(
ADCP_MODULE_ID index,
ADCP_DSH_ID id
);
Description
Selects the alternate physical input for the specified S&H.
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Preconditions
The function only applies to dedicated S&Hs (Class 1 Inputs).
Parameters
Parameters Description
index Identifier for the ADCP instance
id An ADCP_DSH_ID type indicating which dedicated Class 1 S&H to configure for
its alternate input source.
Returns
none.
Remarks
None.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Set S&H 1 to use the alternate input.
PLIB_ADCP_AlternateInputSelect(MY_ADCP_INSTANCE, ADCP_DSH1)
5.6.2.5.3.2 PLIB_ADCP_DefaultInputSelect Function
C
void PLIB_ADCP_DefaultInputSelect(
ADCP_MODULE_ID index,
ADCP_DSH_ID id
);
Description
Selects the default physical input for the specified S&H.
Preconditions
The function only applies to dedicated S&Hs (Class 1 Inputs).
Parameters
Parameters Description
index Identifier for the ADCP instance
id An ADCP_DSH_ID type indicating which dedicated Class 1 S&H to configure for
its alternate input source.
Returns
none.
Remarks
None.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Set S&H 1 to use the default input.
PLIB_ADCP_DefaultInputSelect(MY_ADCP_INSTANCE, ADCP_DSH1)
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5.6.2.5.3.3 PLIB_ADCP_ExistsInputSelect Function
C
bool PLIB_ADCP_ExistsInputSelect(
ADCP_MODULE_ID index
);
Description
This function identifies whether the InputSelect feature is available on the ADCP module. When this function returns true, these
functions are supported on the device:
• PLIB_ADCP_DedicatedSHInputSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the InputSelect feature:
• true - When InputSelect feature is supported on the device
• false - When InputSelect feature is not supported on the device
Remarks
None.
5.6.2.5.3.4 PLIB_ADCP_ExistsModeSelect Function
C
bool PLIB_ADCP_ExistsModeSelect(
ADCP_MODULE_ID index
);
Description
This function identifies whether the ModeSelect feature is available on the ADCP module. When this function returns true, these
functions are supported on the device:
• PLIB_ADCP_SHModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the ModeSelect feature:
• true - When ModeSelect feature is supported on the device
• false - When ModeSelect feature is not supported on the device
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Remarks
None.
5.6.2.5.3.5 PLIB_ADCP_SHModeSelect Function
C
void PLIB_ADCP_SHModeSelect(
ADCP_MODULE_ID index,
ADCP_DSH_ID id,
ADCP_SH_MODE mode
);
Description
Selects the mode (single ended or differential) and encoding (unipolar or two's compliment) for the specified S&H.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance
id An ADCP_DSH_ID type indicating which dedicated S&H to configure to use its
alternate source.
mode An ADCP_SH_MODE type indicating the mode selection.
Returns
none.
Remarks
None.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Set S&H 1 to use the single ended, two's complement mode
// selection.
PLIB_ADCP_SHModeSelect(MY_ADCP_INSTANCE,
ADCP_SH1,
ADCP_SH_MODE_SINGLE_ENDED_TWOS_COMP)
5.6.2.5.4 Interface Routines - Channel Scan
5.6.2.5.4.1 PLIB_ADCP_ChannelScanConfigure Function
C
void PLIB_ADCP_ChannelScanConfigure(
ADCP_MODULE_ID index,
uint32_t lowEnable,
uint32_t highEnable,
ADCP_SCAN_TRG_SRC triggerSource
);
Description
Selects inputs, as determined by the low and high enable scan list for inclusion in the channel scan sequence. If the input is a
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Class 1 or Class 2 type, it will also select the trigger source for that input to be the scan trigger, which is required if included in
channel scanning.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance
lowEnable bit mask for selecting low order scan channels
highEnable bit mask for selecting high order scan channels
triggerSource Trigger source used to initiate channel scan.
Returns
none.
Remarks
The type def AN_SELECT can be used to create a variable to simplify selection of the inputs to include in the channel scan. This
typedef creates bit field structures for each ANx input that are joined with unions for the low and high 32-bit words. See the code
example for Channel scan in the ADCP PLIB help documentation for deatils on its use.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Configure Channel Scanning
// Channels 10 through 13
// Trigger on Timer 1 match.
PLIB_ADCP_ChannelScanConfigure(MY_ADCP_INSTANCE,
0XF000, // AN12 - AN15
0X0F00, // AN24 - AN27
ADCP_SCAN_TRG_SRC_TMR1_MATCH)
5.6.2.5.4.2 PLIB_ADCP_ExistsChannelScan Function
C
bool PLIB_ADCP_ExistsChannelScan(
ADCP_MODULE_ID index
);
Description
This function identifies whether the ChannelScan feature is available on the ADCP module. When this function returns true,
these functions are supported on the device:
• PLIB_ADCP_ChannelScanConfigure
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the ChannelScan feature:
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• true - When ChannelScan feature is supported on the device
• false - When ChannelScan feature is not supported on the device
Remarks
None.
5.6.2.5.5 Interface Routines - Triggering
5.6.2.5.5.1 PLIB_ADCP_GlobalSoftwareTrigger Function
C
void PLIB_ADCP_GlobalSoftwareTrigger(
ADCP_MODULE_ID index
);
Description
All inputs or scan list that is configured to trigger on the global software trigger are triggered.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance
Returns
None.
Remarks
None.
Example
PLIB_ADCP_GlobalSoftwareTrigger(MY_ADCP_INSTANCE);
5.6.2.5.5.2 PLIB_ADCP_IndividualTrigger Function
C
void PLIB_ADCP_IndividualTrigger(
ADCP_MODULE_ID index,
ADCP_INPUT_ID inputId
);
Description
Forces a trigger of an individual Class 1 or Class 2 channel independent of its configured trigger source.
Preconditions
The function only applies to Class 1 and Class 2 inputs.
Parameters
Parameters Description
index Identifier for the ADCP instance
inputId An ADCP_INPUT_ID type indicating which input to trigger.
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Returns
none.
Remarks
None.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Force a trigger of AN5
PLIB_ADCP_IndividualTrigger(MY_ADCP_INSTANCE, ADCP_CLASS12_AN5)
5.6.2.5.5.3 PLIB_ADCP_Class12TriggerConfigure Function
C
void PLIB_ADCP_Class12TriggerConfigure(
ADCP_MODULE_ID index,
ADCP_CLASS12_INPUT_ID inputId,
ADCP_TRG_SRC triggerSource
);
Description
Configures the trigger source for Class 1 or Class 2 inputs. A call to this function is not required when the input is being used as
part of a channel scan as the channel scan configure function also configures all trigger sources.
Preconditions
The function only applies to Class 1 and Class 2 inputs.
Parameters
Parameters Description
index Identifier for the ADCP instance
inputId Class 1 or Class 2 input to configure the trigger for.
triggerSource Trigger source to use for this input.
Returns
none.
Remarks
None.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Configure AN0 for triggering from INT0.
PLIB_ADCP_Class12TriggerConfigure(MY_ADCP_INSTANCE,
ADCP_CLASS12_AN0,
ADCP_TRG_SRC_INT0);
5.6.2.5.5.4 PLIB_ADCP_ExistsTriggering Function
C
bool PLIB_ADCP_ExistsTriggering(
ADCP_MODULE_ID index
);
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Description
This function identifies whether the Triggering feature is available on the ADCP module. When this function returns true, these
functions are supported on the device:
• PLIB_ADCP_Class12TriggerConfigure
• PLIB_ADCP_GlobalSoftwareTrigger
• PLIB_ADCP_IndividualTrigger
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the Triggering feature:
• true - When Triggering feature is supported on the device
• false - When Triggering feature is not supported on the device
Remarks
None.
5.6.2.5.6 Interface Routines - Individual Analog Input Conversion Results
5.6.2.5.6.1 PLIB_ADCP_ResultReady Function
C
AN_READY PLIB_ADCP_ResultReady(
ADCP_MODULE_ID index
);
Description
Returns a result indicating which analog inputs have conversion results ready.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance
Returns
A AN_READY type indicating conversion result status.
Remarks
This function returns individual conversion results. It does not return results from the module.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
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AN_READY MyRdyStatus;
// check for data and process it
if ((MyRdyStatus = PLIB_ADCP_ResultReady(MY_ADCP_INSTANCE)) != 0) {
// fetch the results and process
}
5.6.2.5.6.2 PLIB_ADCP_ResultGet Function
C
int32_t PLIB_ADCP_ResultGet(
ADCP_MODULE_ID index,
ADCP_INPUT_ID inputId
);
Description
Returns the specified Pipelined ADC analog input conversion result.
Preconditions
A valid conversion is ready to be fetched.
Parameters
Parameters Description
index Identifier for the ADCP instance
inputId Identifier for the input
Returns
The conversion result expressed as a 32 bit integer.
Remarks
None.
Example
int32_t result;
...
// fetch result for AN31
result = PLIB_ADCP_ResultGet( MY_ADCP_INSTANCE, ADCP_AN31 );
5.6.2.5.6.3 PLIB_ADCP_ResultReadyGrpIntConfigure Function
C
void PLIB_ADCP_ResultReadyGrpIntConfigure(
ADCP_MODULE_ID index,
uint32_t lowEnable,
uint32_t highEnable
);
Description
Selects inputs, as determined by the input mask channel scan list for inclusion in the global or global interrupt.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance
lowEnable bit mask for selecting low order scan channels
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highEnable bit mask for selecting high order scan channels
Returns
none.
Remarks
The type def AN_SELECT can be used to create a variable to simplify selection of the inputs to include in the global interrupt.
This typedef creates bit field structures for each ANx input that are joined with unions for the low and high 32-bit words. See the
code example for Channel scan in the ADCP PLIB help documentation for deatils on its use.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Configure Global Interrupts
// Analog inputs 10 through 13 are included in the global interrupt.
PLIB_ADCP_ResultReadyGrpIntConfigure(MY_ADCP_INSTANCE,
0x0F00, // inputs AN8 - AN11
0x000F ); // inputs AN16 - AN19
5.6.2.5.6.4 PLIB_ADCP_ExistsConversionResults Function
C
bool PLIB_ADCP_ExistsConversionResults(
ADCP_MODULE_ID index
);
Description
This function identifies whether the ConversionResults feature is available on the ADCP module. When this function returns true,
these functions are supported on the device:
• PLIB_ADCP_ResultReady
• PLIB_ADCP_ResultGet
• PLIB_ADCP_ResultReadyGrpIntConfigure
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the ConversionResults feature:
• true - When ConversionResults feature is supported on the device
• false - When ConversionResults feature is not supported on the device
Remarks
None.
5.6.2.5.7 Interface Routines - Digital Comparator
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5.6.2.5.7.1 PLIB_ADCP_DigCmpEnable Function
C
void PLIB_ADCP_DigCmpEnable(
ADCP_MODULE_ID index,
ADCP_DCMP_ID id
);
Description
This function enables (turns ON) the selected Digital Comparator in the specified Pipelined ADC module.
Preconditions
The digital comparator should be configured using the PLIB_ADCP_Configure() function prior to enabling.
Parameters
Parameters Description
index Identifier for the ADCP instance
id Identifier for the digital comparator in the ADCP module.
Returns
None.
Remarks
None
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Enable Digital Comparator 1
PLIB_ADCP_DigCmpEnable(MY_ADCP_INSTANCE, ADCP_DCMP1);
5.6.2.5.7.2 PLIB_ADCP_DigCmpDisable Function
C
void PLIB_ADCP_DigCmpDisable(
ADCP_MODULE_ID index,
ADCP_DCMP_ID id
);
Description
This function Disables (turns OFF) the selected Digital Comparator in the specified Pipelined ADC module.
Preconditions
none.
Parameters
Parameters Description
index Identifier for the ADCP instance
id Identifier for the digital comparator in the ADCP module.
Returns
None.
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Remarks
None
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Disable Digital Comparator 1
PLIB_ADCP_DigCmpDisable(MY_ADCP_INSTANCE, ADCP_DCMP1);
5.6.2.5.7.3 PLIB_ADCP_DigCmpAIdGet Function
C
int16_t PLIB_ADCP_DigCmpAIdGet(
ADCP_MODULE_ID index,
ADCP_DCMP_ID id
);
Description
This function tests the DigCmp Event Flag and if true, returns the ANx Identifier for the input which caused the event or -1 if there
was no pending DigCmp event. The ID value returned corresponds to numeric portion of the analog input ID, ANx.
Preconditions
none.
Parameters
Parameters Description
index Identifier for the ADCP instance
id Identifier for the digital comparator in the ADCP module.
Returns
Value x of type int16_t where x is the index to the analog input ANx which caused the event or -1 if no event has occured.
Remarks
None
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
int16_t DigCmpResult;
// Get Digital Comparator 1 result.
DigCmpResult = PLIB_ADCP_DigCmpAIdGet(MY_ADCP_INSTANCE, ADCP_DCMP1);
if (DigCmpResult != -1) {
// process event
}
5.6.2.5.7.4 PLIB_ADCP_DigCmpConfig Function
C
void PLIB_ADCP_DigCmpConfig(
ADCP_MODULE_ID index,
ADCP_DCMP_ID id,
bool globalIntEnable,
bool inBetweenOrEqual,
bool greaterEqualHi,
bool lessThanHi,
bool greaterEqualLo,
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bool lessThanLo,
uint32_t inputEnable,
int32_t hiLimit,
int32_t loLimit
);
Description
Configures all parameters for the Digital Comparator module of the pipelined ADC.
Preconditions
The module is disabled when calling this function.
Parameters
Parameters Description
index Identifier for the ADCP instance
id Identifier for the digital comparator in this device
globalIntEnable When set, comparator events are included in the Global Interrupt
inBetweenOrEqual Event is generated when result is greater than or equal to loLimit and less than
hiLimit
greaterEqualHi Event is generated when result is greater than or equal to hiLimit
lessThanHi Event is generated when result is less than hiLimit
greaterEqualLo Event is generated when result is greater than or equal to loLimit
lessThanLo Event is generated when result is less than loLimit
inputEnable Bit field which determines which analog inputs are tested by this comparator
module. Bit 0 applies to AN0 and bit 31 to AN31.
hiLimit High limit in the same format as the conversion result.
loLimit Low limit in the same format as the conversion result.
Returns
none
Remarks
This function must be called when the ADC is disabled. The format of hiLimit and loLimit must match the output format of the
channel(s) specified in inputEnable.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Configure the Digital Comparator
// Creates an event when the reading of AN0 is between 20% to 80% of the
// full scale 12-bit output.
PLIB_ADCP_DigCmpConfig( MY_ADCP_INSTANCE, // ADCP module ID
ADCP_DCMP1, // Comparator ID
FALSE, // Global Int Enable
TRUE, // test for between low and high
FALSE, // no test for greater then equal to high
FALSE, // no test for less than high
FALSE, // no test for greater then equal to low
FALSE, // no test for less than low
1 << 3, // enable AN3
0x0CCD, // high limit, 80% of full scale
0x0333); // low limit, 20% of full scale
// Enable Digital Comparator 1
PLIB_ADCP_DigCmpEnable(MY_ADCP_INSTANCE, ADCP_DCMP1);
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5.6.2.5.7.5 PLIB_ADCP_ExistsDigCmp Function
C
bool PLIB_ADCP_ExistsDigCmp(
ADCP_MODULE_ID index
);
Description
This function identifies whether the DigitalComparator feature is available on the ADCP module. When this function returns true,
these functions are supported on the device:
• PLIB_ADCP_DigCmpConfig
• PLIB_ADCP_DigCmpEnable
• PLIB_ADCP_DigCmpDisable
• PLIB_ADCP_DigCmpAIdGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the DigitalComparator feature:
• true - When DigitalComparator feature is supported on the device
• false - When DigitalComparator feature is not supported on the device
Remarks
None.
5.6.2.5.8 Interface Routines - Oversampling Digital Filter
5.6.2.5.8.1 PLIB_ADCP_OsampDigFilterEnable Function
C
void PLIB_ADCP_OsampDigFilterEnable(
ADCP_MODULE_ID index,
ADCP_ODFLTR_ID id
);
Description
This function enables (turns ON) the selected Oversampling Digital Filter in the specified Pipelined ADC module.
Preconditions
The Oversampling Digital Filter should be configured using the PLIB_ADCP_Configure() function prior to enabling.
Parameters
Parameters Description
index Identifier for the ADCP instance
id Identifier for the digital Filter in the ADCP module.
5.6 Peripheral Library Help MPLAB Harmony Help ADCP Peripheral Library
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Returns
None.
Remarks
None
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Enable OsampDigFilter1
PLIB_ADCP_OsampDigFilterEnable(MY_ADCP_INSTANCE, ADCP_ODFLTR1);
5.6.2.5.8.2 PLIB_ADCP_OsampDigFilterDisable Function
C
void PLIB_ADCP_OsampDigFilterDisable(
ADCP_MODULE_ID index,
ADCP_ODFLTR_ID id
);
Description
This function Disables (turns OFF) the selected Oversampling Digital Filter in the specified Pipelined ADC module.
Preconditions
none.
Parameters
Parameters Description
index Identifier for the ADCP instance
id Identifier for the digital Filter in the ADCP module.
Returns
None.
Remarks
None
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Disable OsampDigFilter1
PLIB_ADCP_OsampDigFilterDisable(MY_ADCP_INSTANCE, ADCP_ODFLTR1);
5.6.2.5.8.3 PLIB_ADCP_OsampDigFilterDataRdy Function
C
bool PLIB_ADCP_OsampDigFilterDataRdy(
ADCP_MODULE_ID index,
ADCP_ODFLTR_ID id
);
Description
Used to determine if the ADCP digital filter has data ready. A TRUE is returned when data is available which can be fetched
using PLIB_ADCP_OsampDigFilterDataGet()
5.6 Peripheral Library Help MPLAB Harmony Help ADCP Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance
id Identifier for the digital Filter in this device
Returns
A boolean TRUE if data is ready or FALSE if not. .
Remarks
None.
Example
if (PLIB_ADCP_OsampDigFilterDataRdy(MY_ADCP_INSTANCE, ADCP_ODFLTR_ID_0)) {
// fetch and process data
}
5.6.2.5.8.4 PLIB_ADCP_OsampDigFilterDataGet Function
C
int16_t PLIB_ADCP_OsampDigFilterDataGet(
ADCP_MODULE_ID index,
ADCP_ODFLTR_ID id
);
Description
This function is used to fetch data from the Oversampling Digital Filter. The format of the data is determined by the oversampling
setting configuration defined in the call of PLIB_ADCP_OsampDigFilterConfig().
Preconditions
None.
Parameters
Parameters Description
index Identifier for the ADCP instance
dfltrID Identifier for the digital Filter in this device
Returns
A 16 bit result in the format specified by the filter's oversampling setting
Remarks
None.
Example
int16_t myODFLTRResult;
if (PLIB_ADCP_OsampDigFilterDataRdy(MY_ADCP_INSTANCE, ADCP_ODFLTR1)) {
// fetch data
myODFLTRResult = PLIB_ADCP_OsampDigFilterDataGet(MY_ADCP_INSTANCE, ADCP_ODFLTR1);
// process result
...
}
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5.6.2.5.8.5 PLIB_ADCP_ExistsOsampDigFilter Function
C
bool PLIB_ADCP_ExistsOsampDigFilter(
ADCP_MODULE_ID index
);
Description
This function identifies whether the OsampDigitalFilter feature is available on the ADCP module. When this function returns true,
these functions are supported on the device:
• PLIB_ADCP_OsampDigFilterConfig
• PLIB_ADCP_OsampDigFilterEnable
• PLIB_ADCP_OsampDigFilterDisable
• PLIB_ADCP_OsampDigFilterDataRdy
• PLIB_ADCP_OsampDigFilterDataGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the OsampDigitalFilter feature:
• true - When OsampDigitalFilter feature is supported on the device
• false - When OsampDigitalFilter feature is not supported on the device
Remarks
None.
5.6.2.5.8.6 PLIB_ADCP_OsampDigFilterConfig Function
C
void PLIB_ADCP_OsampDigFilterConfig(
ADCP_MODULE_ID index,
ADCP_ODFLTR_ID id,
ADCP_INPUT_ID inputId,
ADCP_ODFLTR_SAMPLE_RATIO oversampleRatio,
bool globalIntEnable
);
Description
Configures all parameters for the Oversampling Digital Filter module of the pipelined ADC.
Preconditions
The Oversampling Digital Filter module is disabled when calling this function.
Parameters
Parameters Description
index Identifier for the ADCP instance
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id Identifier for the digital Filter in this device
inputId Identifier for the analog input to be oversampled
oversampleRatio Enumerator specifying the oversampling ratio
globalIntEnable When set, Filter events are included in the Global Interrupt
Returns
none
Remarks
This function must be called when the ADC is disabled.
Example
// Where MY_ADCP_INSTANCE, is the ADCP instance selected for use by the
// application developer.
// Configure the Oversampling Digital Filter
// AN4 is oversampled at a 16X rate. No global interrupt is enabled.
PLIB_ADCP_OsampDigFilterConfig( MY_ADCP_INSTANCE, // ADCP module ID
ADCP_ODFLTR1, // Filter ID
ADCP_AN4, // Oversample AN4
ADCP_ODFLTR_16X, // 16 x oversampling
FALSE ); // No Global Int Enable
// Enable OsampDigFilter1
PLIB_ADCP_OsampDigFilterEnable(MY_ADCP_INSTANCE, ADCP_ODFLTR1);
5.6.2.5.9 Data Types
5.6.2.5.9.1 ADCP_MODULE_ID Enumeration
C
typedef enum {
ADCP_ID_1,
ADC_NUMBER_OF_MODULES
} ADCP_MODULE_ID;
Description
ADC Module ID
This enumeration identifies the available ADC modules.
Members
Members Description
ADCP_ID_1 ADC Module 1 ID
ADC_NUMBER_OF_MODULES Number of available ADC modules.
Remarks
The caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to
the next.
Not all modules will be available on all microcontrollers. Refer to the data sheet for the specific controller in use to determine
which modules are supported. The numbers used in the enumeration values will match the numbers given in the data sheet.
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5.6.2.5.9.2 ADCP_VREF_SOURCE Enumeration
C
typedef enum {
ADCP_VREF_AVDD_AVSS,
ADCP_VREF_VREFP_AVSS,
ADCP_VREF_AVDD_VREFN,
ADCP_VREF_VREFP_VREFN
} ADCP_VREF_SOURCE;
Description
ADCP VREF Source Select
This data type defines the ADCP Reference Voltage (VREF) Source Select
Members
Members Description
ADCP_VREF_AVDD_AVSS Reference voltage set to AVDD and AVSS
ADCP_VREF_VREFP_AVSS Reference voltage set to VREF positive and AVSS
ADCP_VREF_AVDD_VREFN Reference voltage set to AVDD and VREF negative
ADCP_VREF_VREFP_VREFN Reference voltage set to VREF positive and VREF negative
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.3 ADCP_CLOCK_SOURCE Enumeration
C
typedef enum {
ADCP_CLK_SRC_NONE,
ADCP_CLK_SRC_SYSCLK,
ADCP_CLK_SRC_RFCLK3,
ADCP_CLK_SRC_FRC
} ADCP_CLOCK_SOURCE;
Description
ADCP Clock Source Select
This enumeration data type defines the ADCP Clock Source Select
Members
Members Description
ADCP_CLK_SRC_NONE TAD clock disabled
ADCP_CLK_SRC_SYSCLK TAD clock set to SYSCLK (TCY)
ADCP_CLK_SRC_RFCLK3 TAD clock set to REFCLK3
ADCP_CLK_SRC_FRC TAD clock set to FRC
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.4 ADCP_CLASS12_INPUT_ID Enumeration
C
typedef enum {
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ADCP_CLASS12_AN0,
ADCP_CLASS12_AN1,
ADCP_CLASS12_AN2,
ADCP_CLASS12_AN3,
ADCP_CLASS12_AN4,
ADCP_CLASS12_AN5,
ADCP_CLASS12_AN6,
ADCP_CLASS12_AN7,
ADCP_CLASS12_AN8,
ADCP_CLASS12_AN9,
ADCP_CLASS12_AN10,
ADCP_CLASS12_AN11
} ADCP_CLASS12_INPUT_ID;
Description
ADC Class 1 and Class 2 Input ID
Used to identify the Class 1 and Class 2 ADC analog inputs
Members
Members Description
ADCP_CLASS12_AN0 Analog Input AN0
ADCP_CLASS12_AN1 Analog Input AN1
ADCP_CLASS12_AN2 Analog Input AN2
ADCP_CLASS12_AN3 Analog Input AN3
ADCP_CLASS12_AN4 Analog Input AN4
ADCP_CLASS12_AN5 Analog Input AN5
ADCP_CLASS12_AN6 Analog Input AN6
ADCP_CLASS12_AN7 Analog Input AN7
ADCP_CLASS12_AN8 Analog Input AN8
ADCP_CLASS12_AN9 Analog Input AN9
ADCP_CLASS12_AN10 Analog Input AN10
ADCP_CLASS12_AN11 Analog Input AN11
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.5 ADCP_SH_ID Enumeration
C
typedef enum {
ADCP_SH0,
ADCP_SH1,
ADCP_SH2,
ADCP_SH3,
ADCP_SH4,
ADCP_SH5,
ADCP_NUMBER_OF_SH
} ADCP_SH_ID;
Description
ADCP S&H Select
This enumeration identifies all supported S&Hs.
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Members
Members Description
ADCP_SH0 S&H 0
ADCP_SH1 S&H 1
ADCP_SH2 S&H 2
ADCP_SH3 S&H 3
ADCP_SH4 S&H 4
ADCP_SH5 S&H 5
ADCP_NUMBER_OF_SH Number of S&Hs
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.6 ADCP_DSH_ID Enumeration
C
typedef enum {
ADCP_DSH0,
ADCP_DSH1,
ADCP_DSH2,
ADCP_DSH3,
ADCP_DSH4,
ADCP_NUMBER_OF_DSH
} ADCP_DSH_ID;
Description
ADCP Dedicated S&H Select
This enumeration identifies the supported Dedicated S&Hs.
Members
Members Description
ADCP_DSH0 Dedicated S&H 0
ADCP_DSH1 Dedicated S&H 1
ADCP_DSH2 Dedicated S&H 2
ADCP_DSH3 Dedicated S&H 3
ADCP_DSH4 Dedicated S&H 4
ADCP_NUMBER_OF_DSH Number of Dedicated S&Hs
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.7 ADCP_SH_MODE Enumeration
C
typedef enum {
ADCP_SH_MODE_SINGLE_ENDED_UNIPOLAR,
ADCP_SH_MODE_SINGLE_ENDED_TWOS_COMP,
ADCP_SH_MODE_DIFFERENTIAL_UNIPOLAR,
ADCP_SH_MODE_DIFFERENTIAL_TWOS_COMP
} ADCP_SH_MODE;
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Description
ADCP S&H Mode
Data type defines the available modes for the S&H
Members
Members Description
ADCP_SH_MODE_SINGLE_ENDED_UNIPOLAR Sinlge Ended input, Unipolar encoded
ADCP_SH_MODE_SINGLE_ENDED_TWOS_COMP Sinlge Ended input, two's compliment encoded
ADCP_SH_MODE_DIFFERENTIAL_UNIPOLAR Differential input, Unipolar encoded
ADCP_SH_MODE_DIFFERENTIAL_TWOS_COMP Differential input, two's compliment encoded
Remarks
None
5.6.2.5.9.8 ADCP_INPUT_ID Enumeration
C
typedef enum {
ADCP_AN0,
ADCP_AN1,
ADCP_AN2,
ADCP_AN3,
ADCP_AN4,
ADCP_AN5,
ADCP_AN6,
ADCP_AN7,
ADCP_AN8,
ADCP_AN9,
ADCP_AN10,
ADCP_AN11,
ADCP_AN12,
ADCP_AN13,
ADCP_AN14,
ADCP_AN15,
ADCP_AN16,
ADCP_AN17,
ADCP_AN18,
ADCP_AN19,
ADCP_AN20,
ADCP_AN21,
ADCP_AN22,
ADCP_AN23,
ADCP_AN24,
ADCP_AN25,
ADCP_AN26,
ADCP_AN27,
ADCP_AN28,
ADCP_AN29,
ADCP_AN30,
ADCP_AN31,
ADCP_AN32,
ADCP_AN33,
ADCP_AN34,
ADCP_AN35,
ADCP_AN36,
ADCP_AN37,
ADCP_AN38,
ADCP_AN39,
ADCP_AN40,
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ADCP_AN41,
ADCP_AN42,
ADCP_AN43,
ADCP_AN44,
ADCP_AN45,
ADCP_AN46,
ADCP_AN47,
ADCP_AN48,
ADCP_AN49,
ADCP_AN50,
ADCP_AN51,
ADCP_AN52,
ADCP_AN53,
ADCP_AN54,
ADCP_AN55,
ADCP_AN56,
ADCP_AN57,
ADCP_AN58,
ADCP_AN59,
ADCP_AN60,
ADCP_AN61,
ADCP_AN62,
ADCP_AN63,
ADCP_IVREF,
ADCP_IVTEMP
} ADCP_INPUT_ID;
Description
ADC Input ID
Type for identifying the available ADC Inputs, regardless of Class.
Members
Members Description
ADCP_AN0 Analog Input AN0
ADCP_AN1 Analog Input AN1
ADCP_AN2 Analog Input AN2
ADCP_AN3 Analog Input AN3
ADCP_AN4 Analog Input AN4
ADCP_AN5 Analog Input AN5
ADCP_AN6 Analog Input AN6
ADCP_AN7 Analog Input AN7
ADCP_AN8 Analog Input AN8
ADCP_AN9 Analog Input AN9
ADCP_AN10 Analog Input AN10
ADCP_AN11 Analog Input AN11
ADCP_AN12 Analog Input AN12
ADCP_AN13 Analog Input AN13
ADCP_AN14 Analog Input AN14
ADCP_AN15 Analog Input AN15
ADCP_AN16 Analog Input AN16
ADCP_AN17 Analog Input AN17
ADCP_AN18 Analog Input AN18
ADCP_AN19 Analog Input AN19
ADCP_AN20 Analog Input AN20
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ADCP_AN21 Analog Input AN21
ADCP_AN22 Analog Input AN22
ADCP_AN23 Analog Input AN23
ADCP_AN24 Analog Input AN24
ADCP_AN25 Analog Input AN25
ADCP_AN26 Analog Input AN26
ADCP_AN27 Analog Input AN27
ADCP_AN28 Analog Input AN28
ADCP_AN29 Analog Input AN29
ADCP_AN30 Analog Input AN30
ADCP_AN31 Analog Input AN31
ADCP_AN32 Analog Input AN32
ADCP_AN33 Analog Input AN33
ADCP_AN34 Analog Input AN34
ADCP_AN35 Analog Input AN35
ADCP_AN36 Analog Input AN36
ADCP_AN37 Analog Input AN37
ADCP_AN38 Analog Input AN38
ADCP_AN39 Analog Input AN39
ADCP_AN40 Analog Input AN40
ADCP_AN41 Analog Input AN41
ADCP_AN42 Analog Input AN42
ADCP_AN43 Analog Input AN43
ADCP_AN44 Analog Input AN44
ADCP_AN45 Analog Input AN45
ADCP_AN46 Analog Input AN46
ADCP_AN47 Analog Input AN47
ADCP_AN48 Analog Input AN48
ADCP_AN49 Analog Input AN49
ADCP_AN50 Analog Input AN50
ADCP_AN51 Analog Input AN51
ADCP_AN52 Analog Input AN52
ADCP_AN53 Analog Input AN53
ADCP_AN54 Analog Input AN54
ADCP_AN55 Analog Input AN55
ADCP_AN56 Analog Input AN56
ADCP_AN57 Analog Input AN57
ADCP_AN58 Analog Input AN58
ADCP_AN59 Analog Input AN59
ADCP_AN60 Analog Input AN60
ADCP_AN61 Analog Input AN61
ADCP_AN62 Analog Input AN62
ADCP_AN63 Analog Input AN63
ADCP_IVREF Analog Input for Internal Voltage Reference
ADCP_IVTEMP Analog Input for Internal Temperature Sensor
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Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.9 ADCP_DCMP_ID Enumeration
C
typedef enum {
ADCP_DCMP1,
ADCP_DCMP2,
ADCP_DCMP3,
ADCP_DCMP4,
ADCP_DCMP5,
ADCP_DCMP6,
ADCP_NUMBER_OF_DCMP
} ADCP_DCMP_ID;
Description
ADCP Digital Comparator
This enumeration identifies all supported digital comparators for this ADCP module.
Members
Members Description
ADCP_DCMP1 DCMP1
ADCP_DCMP2 DCMP2
ADCP_DCMP3 DCMP3
ADCP_DCMP4 DCMP4
ADCP_DCMP5 DCMP5
ADCP_DCMP6 DCMP6
ADCP_NUMBER_OF_DCMP Number of Digital Comparators
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.10 ADCP_ODFLTR_ID Enumeration
C
typedef enum {
ADCP_ODFLTR1,
ADCP_ODFLTR2,
ADCP_ODFLTR3,
ADCP_ODFLTR4,
ADCP_ODFLTR5,
ADCP_ODFLTR6,
ADCP_NUMBER_OF_ODFLTR
} ADCP_ODFLTR_ID;
Description
ADCP Oversampling Digital Filter
This enumeration identifies all supported digital Filters for this ADCP module.
Members
Members Description
ADCP_ODFLTR1 ODFLTR1
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ADCP_ODFLTR2 ODFLTR2
ADCP_ODFLTR3 ODFLTR3
ADCP_ODFLTR4 ODFLTR4
ADCP_ODFLTR5 ODFLTR5
ADCP_ODFLTR6 ODFLTR6
ADCP_NUMBER_OF_ODFLTR Number of Oversampling Digital Filters
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.11 ADCP_ODFLTR_OSR Enumeration
C
typedef enum {
ADCP_ODFLTR_4X,
ADCP_ODFLTR_16X,
ADCP_ODFLTR_64X,
ADCP_ODFLTR_256X,
ADCP_ODFLTR_2X,
ADCP_ODFLTR_8X,
ADCP_ODFLTR_32X,
ADCP_ODFLTR_128X
} ADCP_ODFLTR_OSR;
Description
ADCP Oversampling Ratio
ADCP Oversampling Digital Filter oversampling Ratio
This enumeration identifies all supported digital Filter oversampling ratios for this ADCP module. Oversampling ratios determine
the number of samples used to generate a single output and the resulting resolution and format.
Members
Members Description
ADCP_ODFLTR_4X 4x oversampling, shift sum 1 bit to right, output data is 13 bits
ADCP_ODFLTR_16X 16x oversampling, shift sum 2 bits to right, output data is 14 bits
ADCP_ODFLTR_64X 64x oversampling, shift sum 3 bits to right, output data is 15 bits
ADCP_ODFLTR_256X 256x oversampling, shift sum 4 bits to right, output data is 16 bits
ADCP_ODFLTR_2X 2x oversampling, shift sum 0 bits to right, output data is in 12.1 format
ADCP_ODFLTR_8X 8x oversampling, shift sum 1 bit to right, output data is in 13.1 format
ADCP_ODFLTR_32X 32x oversampling, shift sum 2 bits to right, output data is in 14.1 format
ADCP_ODFLTR_128X 128x oversampling, shift sum 3 bit to right, output data is in 15.1 format
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.12 ADCP_SCAN_TRG_SRC Enumeration
C
typedef enum {
ADCP_SCAN_TRG_SRC_NONE,
ADCP_SCAN_TRG_SRC_SOFTWARE,
ADCP_SCAN_TRG_SRC_INT0,
ADCP_SCAN_TRG_SRC_TMR1_MATCH,
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ADCP_SCAN_TRG_SRC_TMR3_MATCH,
ADCP_SCAN_TRG_SRC_TMR5_MATCH,
ADCP_SCAN_TRG_SRC_OCMP1,
ADCP_SCAN_TRG_SRC_OCMP3,
ADCP_SCAN_TRG_SRC_OCMP5,
ADCP_SCAN_TRG_SRC_COMP1_COUT,
ADCP_SCAN_TRG_SRC_COMP2_COUT
} ADCP_SCAN_TRG_SRC;
Description
ADCP Channel Scan Trigger Source Select
This data type defines the ADCP Channel Scan Trigger Source Selections
Members
Members Description
ADCP_SCAN_TRG_SRC_NONE No scan trigger source is selected
ADCP_SCAN_TRG_SRC_SOFTWARE Global Software trigger selected as scan trigger source
ADCP_SCAN_TRG_SRC_INT0 Interrupt 0 (INT0) selected as scan trigger source
ADCP_SCAN_TRG_SRC_TMR1_MATCH Timer 1 Match (TMR1) selected as scan trigger source
ADCP_SCAN_TRG_SRC_TMR3_MATCH Timer 3 Match (TMR3) selected as scan trigger source
ADCP_SCAN_TRG_SRC_TMR5_MATCH Timer 5 Match (TMR5) selected as scan trigger source
ADCP_SCAN_TRG_SRC_OCMP1 Output Compare 1 (OCMP1) selected as scan trigger source
ADCP_SCAN_TRG_SRC_OCMP3 Output Compare 3 (OCMP3) selected as scan trigger source
ADCP_SCAN_TRG_SRC_OCMP5 Output Compare 5 (OCMP5) selected as scan trigger source
ADCP_SCAN_TRG_SRC_COMP1_COUT Analog Comparator 1 (COUT) selected as scan trigger source
ADCP_SCAN_TRG_SRC_COMP2_COUT Analog Comparator 2 (COUT) selected as scan trigger source
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.13 ADCP_TRG_SRC Enumeration
C
typedef enum {
ADCP_TRG_SRC_NONE,
ADCP_TRG_SRC_SOFTWARE,
ADCP_TRG_SRC_SCAN_TRG,
ADCP_TRG_SRC_INT0,
ADCP_TRG_SRC_TMR1_MATCH,
ADCP_TRG_SRC_TMR3_MATCH,
ADCP_TRG_SRC_TMR5_MATCH,
ADCP_TRG_SRC_OCMP1,
ADCP_TRG_SRC_OCMP3,
ADCP_TRG_SRC_OCMP5,
ADCP_TRG_SRC_COMP1_COUT,
ADCP_TRG_SRC_COMP2_COUT
} ADCP_TRG_SRC;
Description
ADCP Trigger Source Select
This data type defines the ADCP Trigger Source Selections
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Members
Members Description
ADCP_TRG_SRC_NONE No trigger source is selected
ADCP_TRG_SRC_SOFTWARE Global Software trigger selected as the trigger source
ADCP_TRG_SRC_SCAN_TRG Use the Channel Scan Trigger as the trigger source (input is part of ch scan)
ADCP_TRG_SRC_INT0 Interrupt 0 (INT0) selected as the trigger source
ADCP_TRG_SRC_TMR1_MATCH Timer 1 Match (TMR1) selected as the trigger source
ADCP_TRG_SRC_TMR3_MATCH Timer 3 Match (TMR3) selected as the trigger source
ADCP_TRG_SRC_TMR5_MATCH Timer 5 Match (TMR5) selected as the trigger source
ADCP_TRG_SRC_OCMP1 Output Compare 1 (OCMP1) selected as the trigger source
ADCP_TRG_SRC_OCMP3 Output Compare 3 (OCMP3) selected as the trigger source
ADCP_TRG_SRC_OCMP5 Output Compare 5 (OCMP5) selected as the trigger source
ADCP_TRG_SRC_COMP1_COUT Analog Comparator 1 (COUT) selected as the trigger source
ADCP_TRG_SRC_COMP2_COUT Analog Comparator 2 (COUT) selected as the trigger source
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.2.5.9.14 AN_SELECT Union
C
union AN_SELECT {
int ret_val;
struct {
uint32_t lowWord;
uint32_t highWord;
};
struct {
uint32_t AN0 : 1;
uint32_t AN1 : 1;
uint32_t AN2 : 1;
uint32_t AN3 : 1;
uint32_t AN4 : 1;
uint32_t AN5 : 1;
uint32_t AN6 : 1;
uint32_t AN7 : 1;
uint32_t AN8 : 1;
uint32_t AN9 : 1;
uint32_t AN10 : 1;
uint32_t AN11 : 1;
uint32_t AN12 : 1;
uint32_t AN13 : 1;
uint32_t AN14 : 1;
uint32_t AN15 : 1;
uint32_t AN16 : 1;
uint32_t AN17 : 1;
uint32_t AN18 : 1;
uint32_t AN19 : 1;
uint32_t AN20 : 1;
uint32_t AN21 : 1;
uint32_t AN22 : 1;
uint32_t AN23 : 1;
uint32_t AN24 : 1;
uint32_t AN25 : 1;
uint32_t AN26 : 1;
uint32_t AN27 : 1;
uint32_t AN28 : 1;
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uint32_t AN29 : 1;
uint32_t AN30 : 1;
uint32_t AN31 : 1;
uint32_t AN32 : 1;
uint32_t AN33 : 1;
uint32_t AN34 : 1;
uint32_t AN35 : 1;
uint32_t AN36 : 1;
uint32_t AN37 : 1;
uint32_t AN38 : 1;
uint32_t AN39 : 1;
uint32_t AN40 : 1;
uint32_t AN41 : 1;
uint32_t AN42 : 1;
uint32_t AN43 : 1;
uint32_t AN44 : 1;
uint32_t AN45 : 1;
uint32_t AN46 : 1;
uint32_t AN47 : 1;
uint32_t AN48 : 1;
uint32_t AN49 : 1;
uint32_t AN50 : 1;
uint32_t AN51 : 1;
uint32_t AN52 : 1;
uint32_t AN53 : 1;
uint32_t AN54 : 1;
uint32_t AN55 : 1;
uint32_t AN56 : 1;
uint32_t AN57 : 1;
uint32_t AN58 : 1;
uint32_t AN59 : 1;
uint32_t AN60 : 1;
uint32_t AN61 : 1;
uint32_t AN62 : 1;
uint32_t AN63 : 1;
};
};
Description
ADCP AN Select Union
Structure labels identify the analog inputs associated with each bit when initializing the structure. Unsigned 32 bit integers,
lowWord and highWord are used as arguments to the function.
Remarks
See the Channel Scanning example in the ADCP Help documentation regarding use of this type define.
5.6.2.5.9.15 AN_READY Type
C
typedef AN_SELECT AN_READY;
Description
ADCP AN Ready Union
Structure labels identify the analog inputs associated with each bit for testing ready status of individual inputs. Unsigned 32 bit
integers, lowWord and highWord allow for testing ready status of groups of bits using a mask.
Remarks
See the Simultaneous Sampling or Channel Scanning examples in the ADCP Help documentation regarding use of this type
define.
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5.6.2.6 Files
Files
Name Description
plib_adcp.h ADCP PLIB Interface Header for ADCP common definitions
Description
5.6.2.6.1 plib_adcp.h
ADCP - Analog to Digital Converter, Pipelined Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
ADCP PLIB for all families of Microchip microcontrollers..The definitions in this file are common to ADCP peripheral.
Functions
Name Description
PLIB_ADCP_AlternateInputSelect Selects the alternate physical input for the specified dedicated (Class
1) S&H.
PLIB_ADCP_CalibrationStart Initiates Pipelined ADC Calibration.
PLIB_ADCP_ChannelScanConfigure Selects input to include in Channel Scan Mode
PLIB_ADCP_Class12TriggerConfigure Configures a Class 1 or Class 2 Trigger Source.
PLIB_ADCP_Configure Configures the Pipelined ADC converter including the ADC calibration
registers.
PLIB_ADCP_DefaultInputSelect Selects the default physical input for the specified dedicated (Class 1)
S&H.
PLIB_ADCP_DigCmpAIdGet Returns the Analog Input ID of for the Comparator Event
PLIB_ADCP_DigCmpConfig Configures the Digital Comparator on the Pipelined ADC converter.
PLIB_ADCP_DigCmpDisable Disables the Digital Comparator in the Pipelined ADC module
PLIB_ADCP_DigCmpEnable Enables the Digital Comparator in the Pipelined ADC module
PLIB_ADCP_Disable Pipelined ADC module is disabled (turned OFF).
PLIB_ADCP_Enable Enables the Pipelined ADC module
PLIB_ADCP_ExistsCalibration Identifies whether the Calibration feature exists on the ADCP module
PLIB_ADCP_ExistsChannelScan Identifies whether the ChannelScan feature exists on the ADCP module
PLIB_ADCP_ExistsConfiguration Identifies whether the Configuration feature exists on the ADCP module
PLIB_ADCP_ExistsConversionResults Identifies whether the ConversionResults feature exists on the ADCP
module
PLIB_ADCP_ExistsDigCmp Identifies whether the DigitalComparator feature exists on the ADCP
module
PLIB_ADCP_ExistsEnableControl Identifies whether the EnableControl feature exists on the ADCP
module
PLIB_ADCP_ExistsInputSelect Identifies whether the InputSelect feature exists on the ADCP module
PLIB_ADCP_ExistsLowPowerControl Identifies whether the LowPowerControl feature exists on the ADCP
module
PLIB_ADCP_ExistsModeSelect Identifies whether the ModeSelect feature exists on the ADCP module
PLIB_ADCP_ExistsOsampDigFilter Identifies whether the OsampDigitalFilter feature exists on the ADCP
module
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PLIB_ADCP_ExistsReadyStatus Identifies whether the ReadyStatus feature exists on the ADCP module
PLIB_ADCP_ExistsTriggering Identifies whether the Triggering feature exists on the ADCP module
PLIB_ADCP_GlobalSoftwareTrigger Initiate a Global Software Trigger on the specified module.
PLIB_ADCP_IndividualTrigger Triggers an individual channel independent of the configured trigger
source
PLIB_ADCP_LowPowerStateEnter Places the Pipelined ADC module in a low power state.
PLIB_ADCP_LowPowerStateExit Takes the Pipelined ADC module out of low power state and puts it into
an operational mode.
PLIB_ADCP_LowPowerStateGet Returns the state of the low power setting.
PLIB_ADCP_ModuleIsReady Returns the overall ready status of the module.
PLIB_ADCP_OsampDigFilterConfig Configures the Oversampling Digital Filter on the Pipelined ADC
converter.
PLIB_ADCP_OsampDigFilterDataGet Used to fetch the data result from the Oversampling Digital Filter.
PLIB_ADCP_OsampDigFilterDataRdy Used to determine if the Oversampling Digital Filter has data ready.
PLIB_ADCP_OsampDigFilterDisable Disables the Oversampling Digital Filter in the Pipelined ADC module
PLIB_ADCP_OsampDigFilterEnable Enables the Oversampling Digital Filter in the Pipelined ADC module
PLIB_ADCP_ResultGet Returns a Pipelined ADC conversion result.
PLIB_ADCP_ResultReady Returns the ADC conversion result ready bits for the module.
PLIB_ADCP_ResultReadyGrpIntConfigure Selects input to include in global interrupt.
PLIB_ADCP_SHModeSelect Selects the mode for the specified S&H.
Types
Name Description
AN_READY This union (identical to the AN_SELECT union) is used as the return value by the
PLIB_ADCP_Result_Ready() function.
Unions
Name Description
AN_SELECT This union of structures is provided to simply selection of analog inputs for
inclusion in a particular function.
File Name
plib_ADCP.h
Company
Microchip Technology Incorporated
5.6.3 BMX Peripheral Library
5.6.3.1 Introduction
Bus Matrix (BMX) Peripheral Library
for
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Microchip Microcontrollers
This library provides a low-level abstraction of the Bus Matrix (BMX) modules on Microchip microcontrollers with a convenient C
language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the
module's registers, thus hiding differences from one microcontroller variant to another.
Bus Matrix Overview
The Bus Matrix is essentially a high-speed switch that establishes connections between devices. Devices can be either master
(initiator) or slave (target).
The Bus Matrix also performs these other important functions:
• Partition memory - The Bus Matrix provides the ability to partition both RAM and flash memory into kernel and user areas. It
also controls the type of access, program or data, for each memory area.
• Enable/disable program Flash memory cache for Direct Memory Access (DMA)
• Enable/disable bus error exceptions - The Bus Matrix provides the ability to disable bus error exceptions for debugging. They
are enabled by default.
• Set Bus Arbitration mode - The Bus Matrix provides the ability to select between arbitration modes. The arbitration modes
control the order and priority of initiator access to peripherals.
5.6.3.2 Release Notes
MPLAB Harmony Version: v0.70b BMX Peripheral Library Version : 0.70b Alpha Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.3.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.6.3.4 Using the Library
This topic describes the basic architecture of the BMX Peripheral Library and provides information and examples on how to use
it.
Interface Header File: peripheral.h
The interface to the BMX library is defined in the "plib_bmx.h" header file, which is included by the "peripheral.h" peripheral
library header file. Any C language source (.c) file that uses the BMX library must include "peripheral.h".
Library File:
The BMX Periphera lLlibrary is part of the processor-specific peripheral library archive (.a) file installed with the compiler.
Libraries in this archive are automatically available to the linker (in the default search path) for any project built using the
Microchip compiler.
5.6.3.4.1 Hardware Abstraction Model
This library provides a low-level abstraction of the BMX module on Microchip family microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
Description
The following figure shows the Bus Matrix hardware abstraction model.
Hardware Abstraction Model
The BMX Peripheral Library provides interface routines to interact with the blocks shown in the diagram above.
The Exception Generator generates a bus error exception for unmapped address accesses from all Bus Matrix initiators:
• Initiator Expansion Interface (IXI) shared bus
• In-Circuit Debug (ICD) unit
• Direct Memory Access (DMA) controller
• CPU data bus
• CPU instruction bus
Each of the above can be individually enabled or disabled with Exception Generator peripheral library routines. All are enabled
by default.
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The Cache Control simply enables/disables program Flash memory (PFM) data cacheability for DMA accesses. The default
setting is disabled. When enabled, the PCACHE module must have data caching enabled.
The Bus Arbitrator assigns priority levels to bus initiators following one of three priority schemes:
• Fixed, with CPU higher than DMA
• Fixed, with DMA higher than CPU (default)
• Rotating between four priority sequences
The Memory Access Control partitions program Flash memory and RAM into kernel and user areas. The RAM can be further
partitioned into data and program segments for both kernel and user areas. By default, the full PFM and RAM are mapped to
Kernel mode.
5.6.3.4.2 How the Library Works
The Bus Matrix is initialized in the start-up code, before an application is invoked. Most applications will not need to modify the
Bus Matrix default settings. The BMX Peripheral Library is available for those applications requiring more complex memory
partitioning, including operating systems and applications requiring specialized memory access. The ability to disable exceptions
for unmapped memory access may be useful for debugging, but is not recommended for normal use. Changes to the arbitration
scheme may improve performance for CPU or DMA intensive applications.
5.6.3.4.2.1 Exception Generator
Any unmapped address access by a Bus Matrix initiator will by default generate an exception. These exceptions may be
individually enabled or disabled with the peripheral library.
Example: Enable CPU instruction exception
// Enable CPU instruction exception
PLIB_BMX_ISBusExceptionEnable();
5.6.3.4.2.2 Cache Control
This peripheral library function enables program Flash memory (data) cacheability for DMA accesses. Data caching must be
enabled in the pcache. Hits are still read from the cache, but misses do not update the cache. This function is disabled by
default.
Example: Enable PFM Cachebility for DMA access
PLIB_BMX_EnablePfmCacheDma()
5.6.3.4.2.3 Bus Arbiter
Since there can be more than one initiator attempting to access the same target, an arbitration scheme must be used to control
access to the target. The arbitration modes assign priority levels to all the initiators. The initiator with the higher priority level will
always win target access over a lower priority initiator. The BMX Bus Arbitrator allows the programmer to select from one of
three arbitration modes.
PLIB_BMX_ARB_MODE_INST
Arbitration mode 0 is a fixed priority scheme, with the CPU given higher priority than DMA. This mode can starve the DMA, so
choose this mode when DMA is not being used.
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PLIB_BMX_ARB_MODE_DMA
Arbitration Mode 1 is a fixed priority scheme like Mode 0, except that the CPU is always the lowest priority. Mode 1 is the default
mode.
PLIB_BMX_ARB_MODE_ROT
Mode 2 arbitration supports rotating priority assignments to all initiators. Instead of a fixed priority assignment, each initiator is
assigned the highest priority in a rotating fashion. In this mode, the rotating priority is applied with the following exceptions:
1. CPU data is always selected over CPU instruction.
2. ICD is always the highest priority.
3. When the CPU is processing an exception (EXL = 1) or an error (ERL = 1), the arbitrator temporarily reverts to Mode 0.
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Note: Priority Sequence 2 is not selected in the rotation priority scheme if there is a pending CPU data access. In this case, once
the data access is complete, Sequence 2 is selected.
Example: Set Bus Arbitration Mode to Rotating Priority
PLIB_BMX_SetArbitrationMode(PLIB_BMX_ARB_ROT);
5.6.3.4.2.4 Memory Access Control
The Bus Matrix allows the programmer to partition program Flash memory into user and kernel partitions. It also allows the
programmer to partition data RAM into user and kernel partitions, each of which can be sub-divided into program and data
partitions. At reset, the entire program Flash memory is one kernel partition and the entire data RAM is one kernel data partition.
Program Flash Memory Partitioning
Partitioning of the program Flash memory is accomplished by setting the offset of the user partition within the program Flash
memory using the PLIB_BMX_ProgramFlashPartition() function. The size of the program Flash memory varies among devices,
but can be retrieved with the PLIB_BMX_ProgramFlashMemorySizeGet() function. The offset must be a multiple of the program
Flash memory block size. The program Flash memory block size may vary among devices. If programmed with a value that is
not a multiple of the block size, the value will automatically be truncated to a block size boundary. At reset, the entire program
Flash memory is mapped to Kernel mode.
Example: Create a User Mode Partition of 12K in Program Flash Memory
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size_t pfmSize;
size_t userSize = (6 * PLIB_PCACHE_PFM_BLOCK_SIZE);
size_t userOffset;
// Get size of PFM
pfmSize = PLIB_BMX_ProgramFlashMemorySizeGet();
userOffset = pfmSize - userSize;
if (userOffset > 0)
{
PLIB_BMX_ProgramFlashPartitionSet(userOffset);
}
Data RAM Memory Partitioning
The Data RAM Can be partitioned into four sections:
• Kernel Data
• Kernel Program
• User Data
• User Program
Similar to the program Flash memory partitioning, the data RAM partitions are created by setting the base addresses of the
various partitions. The BMX Peripheral Library provides a function to set all of the partitions at once. The size of the data RAM
varies among devices, but may be retrieved with the PLIB_BMX_DataRAMSizeGet() function. The partitions must be a multiple
of the Data RAM memory block size. The data RAM memory block size may vary among devices. If programmed with a value
that is not a multiple of the block size, the partition will automatically be truncated to a block size boundary. At reset, the entire
data RAM is mapped to Kernel mode.
Note: At reset, the entire data RAM is mapped to Kernel mode and all of the offsets are set to zero. To partition the data RAM,
all of the offsets must be programmed. If any of the offsets are set to zero, the entire data RAM is allocated to kernel data.
Example: RAM Partitioned as Kernel Data, Kernel Program, User Data and User Program
//Total Data RAM = 32KB.
size_t totalRamSize;
size_t kernProgOffset;
size_t userDataOffset;
size_t userProgOffset;
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size_t kernDataRamSize = (3 * PLIB_PCACHE_DRM_BLOCK_SIZE); //Kernel Data RAM = 6KB
size_t kernProgRamSize = (2 * PLIB_PCACHE_DRM_BLOCK_SIZE); //Kernel Program RAM = 4KB
size_t userDataRamSize = (6 * PLIB_PCACHE_DRM_BLOCK_SIZE); //User Data RAM = 12KB
size_t userProgRamSize = (5 * PLIB_PCACHE_DRM_BLOCK_SIZE); //User Program RAM = 10KB
//Get Size of Data RAM
totalRamSize = PLIB_BMX_DataRAMSizeGet();
//Verify our partition sizes fit our RAM
if ((kernDataRamSize + kernProgRamSize + userDataRamSize + userProgRamSize) != totalRamSize)
{
printf("RAM Partitioning Error\n");
return -1;
}
kernProgOffset = kernDataRamSize;
userDataOffset = kernDataRamSize + kernProgRamSize;
userProgOffset = userDataOffset + userDataRamSize;
PLIB_BMX_DataRAMPartitionSet(kernProgOffset, userDataOffset, userProgOffset);
Example: Determine the size of Data RAM partitions
size_t kernProgOffset;
size_t userDataOffset;
size_t userProgOffset;
size_t kernDataPart;
size_t kernProgPart;
size_t userDataPart;
size_t userProgPart;
size_t totalRamSize;
totalRamSize = PLIB_BMX_DataRAMSizeGet();
kernProgOffset = PLIB_BMX_DataRAMKernelProgramOffsetGet();
userDataOffset = PLIB_BMX_DataRAMUserDataOffsetGet();
userProgOffset = PLIB_BMX_DataRAMUserProgramOffsetGet();
kernDataPart = kernProgOffset;
kernProgPart = userDataOffset - kernProgOffset;
userDataPart = userProgOffset - userDataOffset;
userProgPart = totalRamSize - userProgOffset;
5.6.3.4.3 Configuring the Library
The library is configured for the supported BMX module when the processor is chosen in the MPLAB IDE.
5.6.3.5 Library Interface
Data Types and Constants
Name Description
BMX_MODULE_ID Lists the possible Module IDs for the bus matrix.
PLIB_BMX_ARB_MODE Lists the possible arbitration modes for the bus matrix.
PLIB_BMX_DATA_RAM_WAIT_STATES Defines the number of data RAM wait states for address setup.
PLIB_BMX_EXCEPTION_SRC Defines which events trigger a bus exception.
PLIB_BMX_DRM_BLOCK_SIZE Defines the minimum partition block size in data RAM memory.
PLIB_BMX_PFM_BLOCK_SIZE Defines the minimum partition block size in program Flash memory.
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Arbiter Routines
Name Description
PLIB_BMX_ArbitrationModeGet Returns the bus matrix arbitration mode.
PLIB_BMX_ArbitrationModeSet Sets the bus matrix arbitration mode.
Bus Exception Routines
Name Description
PLIB_BMX_BusExceptionDataDisable Disables the data bus exception.
PLIB_BMX_BusExceptionDataEnable Enables the Data bus exception.
PLIB_BMX_BusExceptionDMADisable Disables the DMA bus exception.
PLIB_BMX_BusExceptionDMAEnable Enables the DMA bus exception.
PLIB_BMX_BusExceptionICDDisable Disables the ICD bus exception.
PLIB_BMX_BusExceptionICDEnable Enables the ICD bus exception.
PLIB_BMX_BusExceptionInstructionDisable Disables the instruction bus exception.
PLIB_BMX_BusExceptionInstructionEnable Enables the instruction bus exception.
PLIB_BMX_BusExceptionIXIDisable Disables the IXI bus exception.
PLIB_BMX_BusExceptionIXIEnable Enables the IXI bus exception.
Feature Existence Routines
Name Description
PLIB_BMX_ExistsArbitrationMode Identifies that the ArbitrationMode feature exists on the BMX
module.
PLIB_BMX_ExistsBusExceptionData Identifies that the BusExceptionData feature exists on the
BMX module.
PLIB_BMX_ExistsBusExceptionDMA Identifies that the BusExceptionDMA feature exists on the
BMX module.
PLIB_BMX_ExistsBusExceptionICD Identifies that the BusExceptionICD feature exists on the
BMX module.
PLIB_BMX_ExistsBusExceptionInstruction Identifies that the BusExceptionInstruction feature exists on
the BMX module.
PLIB_BMX_ExistsBusExceptionIXI Identifies that the BusExceptionIXI feature exists on the BMX
module.
PLIB_BMX_ExistsDataRAMPartition Identifies that the DataRAMPartition feature exists on the
BMX module.
PLIB_BMX_ExistsDataRAMSize Identifies that the DataRAMSize feature exists on the BMX
module.
PLIB_BMX_ExistsDataRamWaitState Identifies that the DataRamWaitState feature exists on the
BMX module.
PLIB_BMX_ExistsProgramFlashBootSize Identifies that the ProgramFlashBootSize feature exists on
the BMX module.
PLIB_BMX_ExistsProgramFlashMemoryCacheDma Identifies that the ProgramFlashMemoryCacheDma feature
exists on the BMX module.
PLIB_BMX_ExistsProgramFlashMemorySize Identifies that the ProgramFlashMemorySize feature exists on
the BMX module.
PLIB_BMX_ExistsProgramFlashPartition Identifies that the ProgramFlashPartition feature exists on the
BMX module.
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Memory Access Control Routines
Name Description
PLIB_BMX_DataRAMKernelProgramOffsetGet Gets the offset (from start of RAM) of the kernel program partition.
PLIB_BMX_DataRAMPartitionSet Sets the size of the kernel and user partitions in data RAM
memory.
PLIB_BMX_DataRAMSizeGet Gets the size of data RAM memory.
PLIB_BMX_DataRAMUserDataOffsetGet Gets the offset (from start of RAM) of the user data partition.
PLIB_BMX_DataRAMUserProgramOffsetGet Gets the offset (from start of RAM) of the user program partition.
PLIB_BMX_DataRamWaitStateGet Returns the number of data RAM Wait states.
PLIB_BMX_DataRamWaitStateSet Sets the number of data RAM Wait states.
PLIB_BMX_ProgramFlashBootSizeGet Gets the size of boot program Flash memory.
PLIB_BMX_ProgramFlashMemorySizeGet Gets the size of program Flash memory.
PLIB_BMX_ProgramFlashPartitionGet Gets the size of the kernel partition in program Flash memory.
PLIB_BMX_ProgramFlashPartitionSet Sets the size of the kernel and user partitions in program Flash
memory.
Program Flash Cache Routines
Name Description
PLIB_BMX_ProgramFlashMemoryCacheDmaDisable Disables the bus matrix program Flash cacheability for DMA.
PLIB_BMX_ProgramFlashMemoryCacheDmaEnable Enables the bus matrix program Flash cacheability for DMA.
Description
The BMX peripheral library consists of a set of interface routines, data types and constants, and macros provided by the
plib_bmx.h header file. This section describes those items.
5.6.3.5.1 Bus Exception Routines
5.6.3.5.1.1 PLIB_BMX_BusExceptionDataDisable Function
C
void PLIB_BMX_BusExceptionDataDisable(
BMX_MODULE_ID index
);
Description
This function disables the data bus exception.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be disabled
Returns
None.
Remarks
This function implements an operation of the BusExceptionData feature. This feature may not be available on all devices. Please
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refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsBusExceptionData in your application to
to automatically determine whether this feature is available.
Example
PLIB_BMX_BusExceptionDataDisable(BMX_ID_0);
5.6.3.5.1.2 PLIB_BMX_BusExceptionDataEnable Function
C
void PLIB_BMX_BusExceptionDataEnable(
BMX_MODULE_ID index
);
Description
This function enables the Data bus exception.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be enabled
Returns
None.
Remarks
This function implements an operation of the BusExceptionData feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsBusExceptionData in your application to
to automatically determine whether this feature is available.
Example
PLIB_BMX_BusExceptionDataEnable(BMX_ID_0);
5.6.3.5.1.3 PLIB_BMX_BusExceptionDMADisable Function
C
void PLIB_BMX_BusExceptionDMADisable(
BMX_MODULE_ID index
);
Description
This function disables the DMA bus exception.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be disabled
Returns
None.
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Remarks
This function implements an operation of the BusExceptionDMA feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsBusExceptionDMA in your application to
to automatically determine whether this feature is available.
Example
PLIB_BMX_BusExceptionDMADisable(BMX_ID_0);
5.6.3.5.1.4 PLIB_BMX_BusExceptionDMAEnable Function
C
void PLIB_BMX_BusExceptionDMAEnable(
BMX_MODULE_ID index
);
Description
This function enables the DMA bus exception.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be enabled
Returns
None.
Remarks
This function implements an operation of the BusExceptionDMA feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsBusExceptionDMA in your application to
to automatically determine whether this feature is available.
Example
PLIB_BMX_BusExceptionDMAEnable(BMX_ID_0);
5.6.3.5.1.5 PLIB_BMX_BusExceptionICDDisable Function
C
void PLIB_BMX_BusExceptionICDDisable(
BMX_MODULE_ID index
);
Description
This function disables the ICD bus exception.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be disabled
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Returns
None.
Remarks
This function implements an operation of the BusExceptionICD feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsBusExceptionICD in your application to
to automatically determine whether this feature is available.
Example
PLIB_BMX_BusExceptionICDDisable(BMX_ID_0);
5.6.3.5.1.6 PLIB_BMX_BusExceptionICDEnable Function
C
void PLIB_BMX_BusExceptionICDEnable(
BMX_MODULE_ID index
);
Description
This function enables the ICD bus exception.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be enabled
Returns
None.
Remarks
This function implements an operation of the BusExceptionICD feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsBusExceptionICD in your application to
to automatically determine whether this feature is available.
Example
PLIB_BMX_BusExceptionICDEnable(BMX_ID_0);
5.6.3.5.1.7 PLIB_BMX_BusExceptionInstructionDisable Function
C
void PLIB_BMX_BusExceptionInstructionDisable(
BMX_MODULE_ID index
);
Description
This function disables the instruction bus exception.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be disabled
Returns
None.
Remarks
This function implements an operation of the BusExceptionInstruction feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsBusExceptionInstruction in your
application to to automatically determine whether this feature is available.
Example
PLIB_BMX_BusExceptionInstructionDisable(BMX_ID_0);
5.6.3.5.1.8 PLIB_BMX_BusExceptionInstructionEnable Function
C
void PLIB_BMX_BusExceptionInstructionEnable(
BMX_MODULE_ID index
);
Description
This function enables the instruction bus exception.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be enabled
Returns
None.
Remarks
This function implements an operation of the BusExceptionInstruction feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsBusExceptionInstruction in your
application to to automatically determine whether this feature is available.
Example
PLIB_BMX_BusExceptionInstructionEnable(BMX_ID_0);
5.6.3.5.1.9 PLIB_BMX_BusExceptionIXIDisable Function
C
void PLIB_BMX_BusExceptionIXIDisable(
BMX_MODULE_ID index
);
Description
This function disables the IXI bus exception.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be disabled
Returns
None.
Remarks
This function implements an operation of the BusExceptionIXI feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsBusExceptionIXI in your application to to
automatically determine whether this feature is available.
Example
PLIB_BMX_BusExceptionIXIDisable(BMX_ID_0);
5.6.3.5.1.10 PLIB_BMX_BusExceptionIXIEnable Function
C
void PLIB_BMX_BusExceptionIXIEnable(
BMX_MODULE_ID index
);
Description
This function enables the IXI bus exception.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be enabled
Returns
None.
Remarks
This function implements an operation of the BusExceptionIXI feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsBusExceptionIXI in your application to to
automatically determine whether this feature is available.
Example
PLIB_BMX_BusExceptionIXIEnable(BMX_ID_0);
5.6.3.5.2 Program Flash Cache Routines
5.6.3.5.2.1 PLIB_BMX_ProgramFlashMemoryCacheDmaDisable Function
C
void PLIB_BMX_ProgramFlashMemoryCacheDmaDisable(
BMX_MODULE_ID index
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);
Description
This function disables the program Flash cacheability for DMA.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be disabled
Returns
None.
Remarks
This function implements an operation of the ProgramFlashMemoryCacheDma feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_BMX_ExistsProgramFlashMemoryCacheDma in your application to to automatically determine whether this feature is
available.
Example
PLIB_BMX_ProgramFlashMemoryCacheDmaDisable(BMX_ID_0);
5.6.3.5.2.2 PLIB_BMX_ProgramFlashMemoryCacheDmaEnable Function
C
void PLIB_BMX_ProgramFlashMemoryCacheDmaEnable(
BMX_MODULE_ID index
);
Description
This function enables the program Flash cacheability for DMA.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be enabled
Returns
None.
Remarks
This function implements an operation of the ProgramFlashMemoryCacheDma feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_BMX_ExistsProgramFlashMemoryCacheDma in your application to to automatically determine whether this feature is
available.
Example
PLIB_BMX_ProgramFlashMemoryCacheDmaEnable(BMX_ID_0);
5.6.3.5.3 Arbiter Routines
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5.6.3.5.3.1 PLIB_BMX_ArbitrationModeGet Function
C
PLIB_BMX_ARB_MODE PLIB_BMX_ArbitrationModeGet(
BMX_MODULE_ID index
);
Description
This function returns the bus matrix arbitration mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
PLIB_BMX_ARB_MODE enumerator value representing the arbitration mode.
Remarks
This function implements an operation of the ArbitrationMode feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsArbitrationMode in your application to to
automatically determine whether this feature is available.
Example
PLIB_BMX_ARB_MODE mode;
mode = PLIB_BMX_ArbitrationModeGet(BMX_ID_0);
5.6.3.5.3.2 PLIB_BMX_ArbitrationModeSet Function
C
void PLIB_BMX_ArbitrationModeSet(
BMX_MODULE_ID index,
PLIB_BMX_ARB_MODE mode
);
Description
This function sets the bus matrix arbitration mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode Identifies the desired arbitration mode
Returns
None.
Remarks
This function implements an operation of the ArbitrationMode feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsArbitrationMode in your application to to
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automatically determine whether this feature is available.
Example
PLIB_BMX_ArbitrationModeSet(BMX_ID_0, PLIB_BMX_ARB_MODE_DMA);
5.6.3.5.4 Memory Access Control Routines
5.6.3.5.4.1 PLIB_BMX_DataRAMKernelProgramOffsetGet Function
C
size_t PLIB_BMX_DataRAMKernelProgramOffsetGet(
BMX_MODULE_ID index
);
Description
This function returns the offset of start address of the kernel program RAM partition. This represents the size of the kernel data
RAM partition.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
Offset of kernel program partition from base of RAM.
Remarks
This function implements an operation of the DataRAMPartition feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsDataRAMPartition in your application to
to automatically determine whether this feature is available.
Example
size_t kernProgOffset;
kernProgOffset = PLIB_BMX_DataRAMKernelProgramOffsetGet(BMX_ID_0);
5.6.3.5.4.2 PLIB_BMX_DataRAMPartitionSet Function
C
void PLIB_BMX_DataRAMPartitionSet(
BMX_MODULE_ID index,
size_t kernProgOffset,
size_t userDataOffset,
size_t userProgOffset
);
Description
This function sets the size of the kernel and user partitions in the data RAM memory (DRM). By default, the entire data RAM is
mapped to Kernel mode and all of the offsets are zero. To partition the data RAM, all of the offsets must be set to a minimum of
one DRM block size. If any of the offsets are set to zero, the entire data RAM is allocated to kernel data. The partitions must be a
multiple of PLIB_BMX_DRM_BLOCK_SIZE. If programmed with a value that is not a multiple of
PLIB_BMX_DRM_BLOCK_SIZE, the value will be automatically truncated to PLIB_BMX_DRM_BLOCK_SIZE.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
kernProgOffset Size of the offset of the Kernel Program partition
userDataOffset Size of the offset of the User Data partition
userProgOffset Size of the offset of the User Program partition
Returns
None.
Remarks
This function implements an operation of the DataRAMPartition feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsDataRAMPartition in your application to
to automatically determine whether this feature is available.
Example
//Total Data RAM = 32 KB.
size_t totalRamSize;
size_t kernDataRamSize = (3 * PLIB_BMX_DRM_BLOCK_SIZE);
size_t kernProgRamSize = (2 * PLIB_BMX_DRM_BLOCK_SIZE);
size_t userDataRamSize = (6 * PLIB_BMX_DRM_BLOCK_SIZE);
size_t userProgRamSize = (5 * PLIB_BMX_DRM_BLOCK_SIZE);
//Get Size of Data RAM
totalRamSize = PLIB_BMX_DataRAMSizeGet(BMX_ID_0);
//Verify our partition sizes fit our RAM
if ((kernDataRamSize + kernProgRamSize + userDataRamSize +
userProgRamSize) != totalRamSize)
{
printf("RAM Partitioning Errorn");
}
size_t kernProgOffset;
size_t userDataOffset;
size_t userProgOffset;
kernProgOffset = kernDataRamSize;
userDataOffset = kernDataRamSize + kernProgRamSize;
userProgOffset = userDataOffset + userDataRamSize;
PLIB_BMX_DataRAMPartitionSet(BMX_ID_0, kernProgOffset,
userDataOffset, userProgOffset);
5.6.3.5.4.3 PLIB_BMX_DataRAMSizeGet Function
C
size_t PLIB_BMX_DataRAMSizeGet(
BMX_MODULE_ID index
);
Description
This function returns the size of the data RAM memory.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
Size of data RAM memory.
Remarks
This function implements an operation of the DataRAMSize feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsDataRAMSize in your application to to
automatically determine whether this feature is available.
Example
size_t drmSize;
drmSize = PLIB_BMX_DataRAMSizeGet(BMX_ID_0);
5.6.3.5.4.4 PLIB_BMX_DataRAMUserDataOffsetGet Function
C
size_t PLIB_BMX_DataRAMUserDataOffsetGet(
BMX_MODULE_ID index
);
Description
This function returns the offset of start address of the user data RAM partition. Subtracting the kernel program offset from the
user data offset gives the size of the kernel program RAM partition.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Offset of user data partition from base of RAM.
Remarks
This function implements an operation of the DataRAMPartition feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsDataRAMPartition in your application to
to automatically determine whether this feature is available.
Example
size_t userDataOffset;
userDataOffset = PLIB_BMX_DataRAMUserDataOffsetGet(BMX_ID_0);
5.6.3.5.4.5 PLIB_BMX_DataRAMUserProgramOffsetGet Function
C
size_t PLIB_BMX_DataRAMUserProgramOffsetGet(
BMX_MODULE_ID index
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);
Description
This function returns the offset of start address of the user program RAM partition. Subtracting the user data offset from the user
program offset gives the size of the user data RAM partition.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
Offset of user data partition from base of RAM.
Remarks
This function implements an operation of the DataRAMPartition feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsDataRAMPartition in your application to
to automatically determine whether this feature is available.
Example
size_t userProgOffset;
userProgOffset = PLIB_BMX_DataRAMUserProgramOffsetGet(BMX_ID_0);
5.6.3.5.4.6 PLIB_BMX_DataRamWaitStateGet Function
C
PLIB_BMX_DATA_RAM_WAIT_STATES PLIB_BMX_DataRamWaitStateGet(
BMX_MODULE_ID index
);
Description
This function returns the number of data RAM Wait states.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
PLIB_BMX_DATA_RAM_WAIT_STATES enumeration representing the number of wait states.
Remarks
This function implements an operation of the DataRamWaitState feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsDataRamWaitState in your
application to to automatically determine whether this feature is available.
Example
PLIB_BMX_DATA_RAM_WAIT_STATES wait;
wait = PLIB_BMX_DataRamWaitStateGet(BMX_ID_0);
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5.6.3.5.4.7 PLIB_BMX_DataRamWaitStateSet Function
C
void PLIB_BMX_DataRamWaitStateSet(
BMX_MODULE_ID index,
PLIB_BMX_DATA_RAM_WAIT_STATES wait
);
Description
This function sets the number of data RAM Wait states.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
PLIB_BMX_DATA_RAM_WAIT_STATES Enumeration representing the number of Wait states
Returns
None.
Remarks
This function implements an operation of the DataRamWaitState feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsDataRamWaitState in your
application to to automatically determine whether this feature is available.
Example
PLIB_BMX_DataRamWaitStateSet(BMX_ID_0, PLIB_BMX_DATA_RAM_WAIT_ONE);
5.6.3.5.4.8 PLIB_BMX_ProgramFlashBootSizeGet Function
C
size_t PLIB_BMX_ProgramFlashBootSizeGet(
BMX_MODULE_ID index
);
Description
This function returns the size of the boot program Flash memory.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
Size of boot program Flash memory.
Remarks
This function implements an operation of the ProgramFlashBootSize feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsProgramFlashBootSize in your
application to to automatically determine whether this feature is available.
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Example
size_t bootSize;
bootSize = PLIB_BMX_ProgramFlashBootSizeGet(BMX_ID_0);
5.6.3.5.4.9 PLIB_BMX_ProgramFlashMemorySizeGet Function
C
size_t PLIB_BMX_ProgramFlashMemorySizeGet(
BMX_MODULE_ID index
);
Description
This function returns the size of the program Flash memory.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
Size of program Flash memory.
Remarks
This function implements an operation of the ProgramFlashMemorySize feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_BMX_ExistsProgramFlashMemorySize in your application to to automatically determine whether this feature is available.
Example
size_t pfmSize;
pfmSize = PLIB_BMX_ProgramFlashMemorySizeGet(BMX_ID_0);
5.6.3.5.4.10 PLIB_BMX_ProgramFlashPartitionGet Function
C
size_t PLIB_BMX_ProgramFlashPartitionGet(
BMX_MODULE_ID index
);
Description
This function gets the size of the kernel partition in the program Flash memory. The remaining Flash is set to user mode, and
may be accessed by user programs. On reset, the entire Flash is mapped to Kernel mode, and this function will return zero.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
Size of the kernel partition in program Flash memory.
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Remarks
This function implements an operation of the ProgramFlashPartition feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsProgramFlashPartition in your
application to to automatically determine whether this feature is available.
Example
size_t pfmSize;
size_t userPfmSize;
size_t kernPfmSize;
// Get size of PFM
pfmSize = PLIB_BMX_ProgramFlashMemorySizeGet(BMX_ID_0);
kernPfmSize = PLIB_BMX_ProgramFlashPartitionGet(BMX_ID_0);
userPfmSize = pfmSize - kernPfmSize;
5.6.3.5.4.11 PLIB_BMX_ProgramFlashPartitionSet Function
C
void PLIB_BMX_ProgramFlashPartitionSet(
BMX_MODULE_ID index,
size_t user_size
);
Description
This function sets the size of the kernel and user partitions in program Flash memory (PFM). Kernel programs may access both
partitions, but user programs may not access the kernel partition (including peripheral registers). By default, the entire Flash is
mapped to Kernel mode. If called with a non-zero value, a user partition of size user_size is created, and the remaining PFM
remains in Kernel mode. The user partition must be a multiple of PLIB_BMX_PFM_BLOCK_SIZE. If programmed with a value
that is not a multiple of PLIB_BMX_PFM_BLOCK_SIZE, the value will be truncated to a PLIB_BMX_PFM_BLOCK_SIZE
boundary.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
userSize Size of the user partition in PFM
Returns
None.
Remarks
This function implements an operation of the ProgramFlashPartition feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_BMX_ExistsProgramFlashPartition in your
application to to automatically determine whether this feature is available.
Example
size_t pfm_size;
size_t userSize = (6 * PLIB_BMX_PFM_BLOCK_SIZE);
size_t userOffset;
// Get size of PFM
size_t pfmSize;
pfmSize = PLIB_BMX_ProgramFlashMemorySizeGet(BMX_ID_0);
userOffset = pfmSize - userSize;
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if (userOffset > 0)
{
PLIB_BMX_ProgramFlashPartitionSet(BMX_ID_0, userOffset);
}
5.6.3.5.5 Data Types and Constants
5.6.3.5.5.1 BMX_MODULE_ID Enumeration
C
typedef enum {
BMX_ID_0,
BMX_NUMBER_OF_MODULES
} BMX_MODULE_ID;
Description
Module ID
This enumeration lists the possible Module IDs for the bus matrix.
Remarks
Refer to the specific device data sheet to obtain the correct number of modules defined for the desired device.
5.6.3.5.5.2 PLIB_BMX_ARB_MODE Enumeration
C
typedef enum {
PLIB_BMX_ARB_MODE_INST,
PLIB_BMX_ARB_MODE_DMA,
PLIB_BMX_ARB_MODE_ROT
} PLIB_BMX_ARB_MODE;
Description
Arbitration Mode
This enumeration lists the possible arbitration modes for the bus matrix.
Members
Members Description
PLIB_BMX_ARB_MODE_INST Arbitration Mode 0
PLIB_BMX_ARB_MODE_DMA Arbitration Mode 1
PLIB_BMX_ARB_MODE_ROT Arbitration Mode 2
5.6.3.5.5.3 PLIB_BMX_DATA_RAM_WAIT_STATES Enumeration
C
typedef enum {
PLIB_BMX_DATA_RAM_WAIT_ZERO,
PLIB_BMX_DATA_RAM_WAIT_ONE
} PLIB_BMX_DATA_RAM_WAIT_STATES;
Description
Wait States
This definition specifies the number of data RAM wait states for address setup.
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Members
Members Description
PLIB_BMX_DATA_RAM_WAIT_ZERO Zero wait states for address setup
PLIB_BMX_DATA_RAM_WAIT_ONE One wait state for address setup
5.6.3.5.5.4 PLIB_BMX_EXCEPTION_SRC Enumeration
C
typedef enum {
PLIB_BMX_ERR_IXI,
PLIB_BMX_ERR_ICD,
PLIB_BMX_ERR_DMA,
PLIB_BMX_ERR_DATA,
PLIB_BMX_ERR_INST
} PLIB_BMX_EXCEPTION_SRC;
Description
Exception Bits
This definition specifies which events trigger a bus exception.
Members
Members Description
PLIB_BMX_ERR_IXI IXI Shared Bus
PLIB_BMX_ERR_ICD In-Circuit Debugger
PLIB_BMX_ERR_DMA DMA Controller
PLIB_BMX_ERR_DATA CPU Data Bus
PLIB_BMX_ERR_INST CPU Instruction Bus
5.6.3.5.5.5 PLIB_BMX_DRM_BLOCK_SIZE Macro
C
#define PLIB_BMX_DRM_BLOCK_SIZE 2048
Description
Program Flash Partition Block Size
This definition specifies the minimum partition block size in data RAM memory.
5.6.3.5.5.6 PLIB_BMX_PFM_BLOCK_SIZE Macro
C
#define PLIB_BMX_PFM_BLOCK_SIZE 2048
Description
Program Flash Partition Block Size
This definition specifies the minimum partition block size in program Flash memory.
5.6.3.5.6 Feature Existence Routines
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5.6.3.5.6.1 PLIB_BMX_ExistsArbitrationMode Function
C
bool PLIB_BMX_ExistsArbitrationMode(
BMX_MODULE_ID index
);
Description
This interface identifies that the ArbitrationMode feature is available on the BMX module. When this interface returns true, these
functions are supported on the device:
• PLIB_BMX_ArbitrationModeSet
• PLIB_BMX_ArbitrationModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ArbitrationMode feature is supported on the device
• false = The ArbitrationMode feature is not supported on the device
Remarks
None.
5.6.3.5.6.2 PLIB_BMX_ExistsBusExceptionData Function
C
bool PLIB_BMX_ExistsBusExceptionData(
BMX_MODULE_ID index
);
Description
This interface identifies that the BusExceptionData feature is available on the BMX module. When this interface returns true,
these functions are supported on the device:
• PLIB_BMX_BusExceptionDataEnable
• PLIB_BMX_BusExceptionDataDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The BusExceptionData feature is supported on the device
• false = The BusExceptionData feature is not supported on the device
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Remarks
None.
5.6.3.5.6.3 PLIB_BMX_ExistsBusExceptionDMA Function
C
bool PLIB_BMX_ExistsBusExceptionDMA(
BMX_MODULE_ID index
);
Description
This interface identifies that the BusExceptionDMA feature is available on the BMX module. When this interface returns true,
these functions are supported on the device:
• PLIB_BMX_BusExceptionDMAEnable
• PLIB_BMX_BusExceptionDMADisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The BusExceptionDMA feature is supported on the device
• false = The BusExceptionDMA feature is not supported on the device
Remarks
None.
5.6.3.5.6.4 PLIB_BMX_ExistsBusExceptionICD Function
C
bool PLIB_BMX_ExistsBusExceptionICD(
BMX_MODULE_ID index
);
Description
This interface identifies that the BusExceptionICD feature is available on the BMX module. When this interface returns true,
these functions are supported on the device:
• PLIB_BMX_BusExceptionICDEnable
• PLIB_BMX_BusExceptionICDDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true = The BusExceptionICD feature is supported on the device
• false = TheWhen BusExceptionICD feature is not supported on the device
Remarks
None.
5.6.3.5.6.5 PLIB_BMX_ExistsBusExceptionInstruction Function
C
bool PLIB_BMX_ExistsBusExceptionInstruction(
BMX_MODULE_ID index
);
Description
This interface identifies that the BusExceptionInstruction feature is available on the BMX module. When this interface returns
true, these functions are supported on the device:
• PLIB_BMX_BusExceptionInstructionEnable
• PLIB_BMX_BusExceptionInstructionDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The BusExceptionInstruction feature is supported on the device
• false = The BusExceptionInstruction feature is not supported on the device
Remarks
None.
5.6.3.5.6.6 PLIB_BMX_ExistsBusExceptionIXI Function
C
bool PLIB_BMX_ExistsBusExceptionIXI(
BMX_MODULE_ID index
);
Description
This interface identifies that the BusExceptionIXI feature is available on the BMX module. When this interface returns true, these
functions are supported on the device:
• PLIB_BMX_BusExceptionIXIEnable
• PLIB_BMX_BusExceptionIXIDisable
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The BusExceptionIXI feature is supported on the device
• false = The BusExceptionIXI feature is not supported on the device
Remarks
None.
5.6.3.5.6.7 PLIB_BMX_ExistsDataRAMPartition Function
C
bool PLIB_BMX_ExistsDataRAMPartition(
BMX_MODULE_ID index
);
Description
This interface identifies that the DataRAMPartition feature is available on the BMX module. When this interface returns true,
these functions are supported on the device:
• PLIB_BMX_DataRAMPartitionSet
• PLIB_BMX_DataRAMKernelProgramOffsetGet
• PLIB_BMX_DataRAMUserDataOffsetGet
• PLIB_BMX_DataRAMUserProgramOffsetGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The DataRAMPartition feature is supported on the device
• false = The DataRAMPartition feature is not supported on the device
Remarks
None.
5.6.3.5.6.8 PLIB_BMX_ExistsDataRAMSize Function
C
bool PLIB_BMX_ExistsDataRAMSize(
BMX_MODULE_ID index
);
Description
This interface identifies that the DataRAMSize feature is available on the BMX module. When this interface returns true, this
function is supported on the device:
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• PLIB_BMX_DataRAMSizeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The DataRAMSize feature is supported on the device
• false = The DataRAMSize feature is not supported on the device
Remarks
None.
5.6.3.5.6.9 PLIB_BMX_ExistsDataRamWaitState Function
C
bool PLIB_BMX_ExistsDataRamWaitState(
BMX_MODULE_ID index
);
Description
This interface identifies that the DataRamWaitState feature is available on the BMX module. When this interface returns true,
these functions are supported on the device:
• PLIB_BMX_DataRamWaitStateSet
• PLIB_BMX_DataRamWaitStateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The DataRamWaitState feature is supported on the device
• false = The DataRamWaitState feature is not supported on the device
Remarks
None.
5.6.3.5.6.10 PLIB_BMX_ExistsProgramFlashBootSize Function
C
bool PLIB_BMX_ExistsProgramFlashBootSize(
BMX_MODULE_ID index
);
Description
This interface identifies that the ProgramFlashBootSize feature is available on the BMX module. When this interface returns true,
this function is supported on the device:
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• PLIB_BMX_ProgramFlashBootSizeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ProgramFlashBootSize feature is supported on the device
• false = The ProgramFlashBootSize feature is not supported on the device
Remarks
None.
5.6.3.5.6.11 PLIB_BMX_ExistsProgramFlashMemoryCacheDma Function
C
bool PLIB_BMX_ExistsProgramFlashMemoryCacheDma(
BMX_MODULE_ID index
);
Description
This interface identifies that the ProgramFlashMemoryCacheDma feature is available on the BMX module. When this interface
returns true, these functions are supported on the device:
• PLIB_BMX_ProgramFlashMemoryCacheDmaEnable
• PLIB_BMX_ProgramFlashMemoryCacheDmaDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ProgramFlashMemoryCacheDma feature is supported on the device
• false = The ProgramFlashMemoryCacheDma feature is not supported on the device
Remarks
None.
5.6.3.5.6.12 PLIB_BMX_ExistsProgramFlashMemorySize Function
C
bool PLIB_BMX_ExistsProgramFlashMemorySize(
BMX_MODULE_ID index
);
Description
This interface identifies that the ProgramFlashMemorySize feature is available on the BMX module. When this interface returns
true, this function is supported on the device:
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• PLIB_BMX_ProgramFlashMemorySizeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ProgramFlashMemorySize feature is supported on the device
• false = The ProgramFlashMemorySize feature is not supported on the device
Remarks
None.
5.6.3.5.6.13 PLIB_BMX_ExistsProgramFlashPartition Function
C
bool PLIB_BMX_ExistsProgramFlashPartition(
BMX_MODULE_ID index
);
Description
This interface identifies that the ProgramFlashPartition feature is available on the BMX module. When this interface returns true,
these functions are supported on the device:
• PLIB_BMX_ProgramFlashPartitionGet
• PLIB_BMX_ProgramFlashPartitionSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ProgramFlashPartition feature is supported on the device
• false = The ProgramFlashPartition feature is not supported on the device
Remarks
None.
5.6.3.6 Files
Files
Name Description
plib_bmx.h Defines the Bus Matrix (BMX) Peripheral Library interface
Description
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5.6.3.6.1 plib_bmx.h
Bus Matrix Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
bus matrix (BMX) peripheral library (PLIB) for Microchip microcontrollers. The definitions in this file are for the bus matrix
controller module.
Enumerations
Name Description
PLIB_BMX_ARB_MODE Lists the possible arbitration modes for the bus matrix.
PLIB_BMX_DATA_RAM_WAIT_STATES Defines the number of data RAM wait states for address setup.
PLIB_BMX_EXCEPTION_SRC Defines which events trigger a bus exception.
Functions
Name Description
PLIB_BMX_ArbitrationModeGet Returns the bus matrix arbitration mode.
PLIB_BMX_ArbitrationModeSet Sets the bus matrix arbitration mode.
PLIB_BMX_BusExceptionDataDisable Disables the data bus exception.
PLIB_BMX_BusExceptionDataEnable Enables the Data bus exception.
PLIB_BMX_BusExceptionDMADisable Disables the DMA bus exception.
PLIB_BMX_BusExceptionDMAEnable Enables the DMA bus exception.
PLIB_BMX_BusExceptionICDDisable Disables the ICD bus exception.
PLIB_BMX_BusExceptionICDEnable Enables the ICD bus exception.
PLIB_BMX_BusExceptionInstructionDisable Disables the instruction bus exception.
PLIB_BMX_BusExceptionInstructionEnable Enables the instruction bus exception.
PLIB_BMX_BusExceptionIXIDisable Disables the IXI bus exception.
PLIB_BMX_BusExceptionIXIEnable Enables the IXI bus exception.
PLIB_BMX_DataRAMKernelProgramOffsetGet Gets the offset (from start of RAM) of the kernel program
partition.
PLIB_BMX_DataRAMPartitionSet Sets the size of the kernel and user partitions in data RAM
memory.
PLIB_BMX_DataRAMSizeGet Gets the size of data RAM memory.
PLIB_BMX_DataRAMUserDataOffsetGet Gets the offset (from start of RAM) of the user data partition.
PLIB_BMX_DataRAMUserProgramOffsetGet Gets the offset (from start of RAM) of the user program
partition.
PLIB_BMX_DataRamWaitStateGet Returns the number of data RAM Wait states.
PLIB_BMX_DataRamWaitStateSet Sets the number of data RAM Wait states.
PLIB_BMX_ExistsArbitrationMode Identifies that the ArbitrationMode feature exists on the BMX
module.
PLIB_BMX_ExistsBusExceptionData Identifies that the BusExceptionData feature exists on the
BMX module.
PLIB_BMX_ExistsBusExceptionDMA Identifies that the BusExceptionDMA feature exists on the
BMX module.
PLIB_BMX_ExistsBusExceptionICD Identifies that the BusExceptionICD feature exists on the
BMX module.
PLIB_BMX_ExistsBusExceptionInstruction Identifies that the BusExceptionInstruction feature exists on
the BMX module.
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PLIB_BMX_ExistsBusExceptionIXI Identifies that the BusExceptionIXI feature exists on the
BMX module.
PLIB_BMX_ExistsDataRAMPartition Identifies that the DataRAMPartition feature exists on the
BMX module.
PLIB_BMX_ExistsDataRAMSize Identifies that the DataRAMSize feature exists on the BMX
module.
PLIB_BMX_ExistsDataRamWaitState Identifies that the DataRamWaitState feature exists on the
BMX module.
PLIB_BMX_ExistsProgramFlashBootSize Identifies that the ProgramFlashBootSize feature exists on
the BMX module.
PLIB_BMX_ExistsProgramFlashMemoryCacheDma Identifies that the ProgramFlashMemoryCacheDma feature
exists on the BMX module.
PLIB_BMX_ExistsProgramFlashMemorySize Identifies that the ProgramFlashMemorySize feature exists
on the BMX module.
PLIB_BMX_ExistsProgramFlashPartition Identifies that the ProgramFlashPartition feature exists on
the BMX module.
PLIB_BMX_ProgramFlashBootSizeGet Gets the size of boot program Flash memory.
PLIB_BMX_ProgramFlashMemoryCacheDmaDisable Disables the bus matrix program Flash cacheability for DMA.
PLIB_BMX_ProgramFlashMemoryCacheDmaEnable Enables the bus matrix program Flash cacheability for DMA.
PLIB_BMX_ProgramFlashMemorySizeGet Gets the size of program Flash memory.
PLIB_BMX_ProgramFlashPartitionGet Gets the size of the kernel partition in program Flash
memory.
PLIB_BMX_ProgramFlashPartitionSet Sets the size of the kernel and user partitions in program
Flash memory.
Macros
Name Description
PLIB_BMX_DRM_BLOCK_SIZE Defines the minimum partition block size in data RAM memory.
PLIB_BMX_PFM_BLOCK_SIZE Defines the minimum partition block size in program Flash memory.
File Name
plib_bmx.h
Company
Microchip Technology Inc.
5.6.4 CAN Peripheral Library
5.6.4.1 Introduction
CAN Peripheral Library
for
Microchip Microcontrollers
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The Controller Area Network (CAN) is used primarily in industrial and automotive applications. It is an asynchronous serial data
communication protocol that provides reliable communication in an electrically noisy environment.
This library provides a low-level abstraction of the CAN module on Microchip microcontrollers with a convenient C language
interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the module's
registers, thus hiding differences from one microcontroller variant to another.
Note: Trademarks and Intellectual Property are property of their respective owners. Customers are responsible for obtaining
appropriate licensing or rights before using this software.
5.6.4.2 Release Notes
MPLAB Harmony Version: v0.70b CAN Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.4.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.6.4.4 How the Library Works
Note: Not all modes are available on all the devices. Please refer to the specific device data sheet to determine the set of modes
that are supported for your device.
5.6.4.4.1 About CAN Protocol
The following section briefly discusses the CAN Protocol briefly. For complete details on the CAN protocol, refer to the CAN 2.0
specification available from Bosch.
The CAN bus protocol uses asynchronous communication. Information is passed from transmitters to receivers in data frames,
which are composed of byte fields that define the contents of the data frame. This is shown in the figure below.
Each frame begins with a Start-of-Frame (SOF) bit and terminates with an End-of-Frame (EOF) bit field. The SOF is followed by
arbitration and control fields, which identify the message type, format, length and priority. This information allows each node on
the CAN bus to respond appropriately to the message. The data field conveys the message content and is of variable length,
ranging from 0 to 8 bytes. Error protection is provided by the Cyclic Redundancy Check (CRC) and acknowledgement (ACK)
fields.
5.6.4.4.1.1 Standard ID Message Format
The Standard ID message begins with a Start-of-Frame bit followed by a 12-bit arbitration field. The arbitration field contains an
11-bit identifier and the Remote Transmit Request (RTR) bit. The identifier defines the type of information contained in the
message and is used by each receiving node to determine if the message is of interest. The RTR bit distinguishes a data frame
from a remote frame. For a standard data frame, the RTR bit is clear.
Following the arbitration field is a 6-bit control field, which provides more information about the contents of the message. The first
bit in the control field is an Identifier Extension (IDE) bit, which distinguishes the message as either a standard or extended data
frame. A standard data frame is indicated by a dominant state (logic level ‘0’) during transmission of the IDE bit. The second bit
in the control field is a reserved (RB0) bit, which is in the dominant state (logic level ‘0’). The last 4 bits in the control field
represent the Data Length Code (DLC), which specifies the number of data bytes present in the message.
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The data field follows the control field. This field carries the message data – the actual payload of the data frame. This field is of
variable length, ranging from 0 to 8 bytes. The number of bytes is user-selectable.
The data field is followed by the Cyclic Redundancy Check (CRC) field, which is a 15-bit CRC sequence with one delimiter bit.
The acknowledgement (ACK) field is sent as a recessive bit (logic level ‘1’) and is overwritten as a dominant bit by any receiver
that has received the data correctly.The message is acknowledged by the receiver regardless of the result of the acceptance
filter comparison. The last field is the End-of-Frame field, which consists of 7 recessive bits that indicate the end of message.
5.6.4.4.1.2 Extended ID Message Format
The Extended ID Message frame begins with an SOF bit followed by a 31-bit arbitration field. The arbitration field for the
extended data frame contains 29 identifier bits in two fields separated by a Substitute Remote Request (SRR) bit and an IDE bit.
The SRR bit determines if the message is a remote frame. SRR = 1 for extended data frames. The IDE bit indicates the data
frame type. For the extended data frame, IDE = 1.
The extended data frame Control field consists of 7 bits. The first bit is the RTR. For the extended data frame, RTR = 0. The next
two bits, RB1 and RB0, are reserved bits that are in the dominant state (logic level ‘0’). The last 4 bits in the Control field are the
Data Length Code, which specifies the number of data bytes present in the message.The remaining fields in an extended data
frame are identical to a standard data frame.
5.6.4.4.1.3 Can Bit Time Quanta
The nominal bit rate is the number of bits per second transmitted on the CAN bus.
Nominal bit time = 1 ÷ Nominal Bit Rate.
There are four time segments in a bit time to compensate for any phase shifts due to oscillator drifts or propagation delays.
These time segments do not overlap each other and are represented in terms of Time Quantum (TQ). One TQ is a fixed unit of
time derived from the oscillator clock. The total number of time quanta in a nominal bit time must be programmed between 8 and
25 TQ.
Each bit transmission time consists of four time segments:
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Synchronization Segment – This time segment synchronizes the different nodes connected on the CAN bus. A bit edge is
expected to be within this segment. Based on CAN protocol, the Synchronization Segment is assumed to be one Time Quantum.
Propagation Segment – This time segment compensates for any time delay that may occur due to the bus line or due to the
various transceivers connected on that bus.
Phase Segment 1 – This time segment compensates for errors that may occur due to phase shift in the edges. The time
segment may be lengthened during resynchronization to compensate for the phase shift.
Phase Segment 2 – This time segment compensates for errors that may occur due to phase shift in the edges. The time
segment may be shortened during resynchronization to compensate for the phase shift. The Phase Segment 2 time can be
configured to be either programmable or specified by the Phase Segment 1 time.
Two types of synchronization are used – Hard Synchronization and Resynchronization. A Hard Synchronization occurs once at
the start of a frame. Resynchronization occurs inside a frame.
Hard synchronization takes place on the recessive-to-dominant transition of the start bit. The bit time is restarted from that edge.
Resynchronization takes place when a bit edge does not occur within the Synchronization Segment in a message. One of the
Phase Segments is shortened or lengthened by an amount that depends on the phase error in the signal. The maximum amount
that can be used is determined by the Synchronization Jump Width parameter.
The length of Phase Segment 1 and Phase Segment 2 can be changed depending on oscillator tolerances of the transmitting
and receiving node. Resynchronization compensates for any phase shifts that may occur due to the different oscillators used by
the transmitting and receiving nodes.
Bit Lengthening – If the transmitting node in CAN has a slower oscillator than the receiving node, the next falling edge, and
therefore, the sample point, can be delayed by lengthening Phase Segment 1 in the bit time.
Bit Shortening – If the transmitting node in CAN has a faster oscillator than the receiving node, then the next falling edge, and
therefore, the sample point of the next bit, can be reduced by shortening the Phase Segment 2 in the bit time.
Synchronization Jump Width (SJW) – This determines the synchronization jump width by limiting the amount of lengthening or
shortening that can be applied to the Phase Segment 1 and Phase Segment 2 time intervals. This segment should not be longer
than Phase Segment 2 time. The width can be 1-4 TQ
5.6.4.4.2 Initialization of CAN
5.6.4.4.2.1 Mode Configuration
The CAN module must be enabled before configuration. Enabling the CAN module gives it control over the CAN pins of the
device. The following code example shows how the PLIB_CAN_Enable function is used to enable the module.
/* This code expects the data direction settings to be done from other modules */
/* Switch the CAN module ON */
PLIB_CAN_Enable(CAN_ID_1);
The CAN module must be placed in Configuration mode before attempting to configure it. The following features are available in
Configuration mode only:
• Configuring the CAN module clock and CAN bus speed
• Configuring the message acceptance filter mask
• Assigning the channel buffer memory
• Configuring channel size and Receive Channel Data-only mode.
The CAN module operating mode can be changed by using the PLIB_CAN_OperationModeSelect function. The caller should
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wait until the operating mode is set before proceeding. The PLIB_CAN_OperationModeGet function can be used to obtain the
current operating mode of the CAN module.
/* Switch the CAN module to Configuration mode. Wait until the switch is complete */
PLIB_CAN_Enable(CAN_ID_1);
PLIB_CAN_OperationModeSelect(CAN_ID_1, CAN_CONFIGURATION_MODE);
while(PLIB_CAN_OperationModeGet(CAN_ID_1) != CAN_CONFIGURATION_MODE);
The CAN module must be placed in Normal mode in order to be able to send and receive messages.
The caller should wait until the Normal operating mode is set before proceeding. The PLIB_CAN_OperationModeSelect function
can be used to obtain the current operating mode of the CAN module.
/* Switch the CAN module to Normal mode. Wait until the switch is complete */
PLIB_CAN_OperationModeSelect(CAN_ID_1, CAN_NORMAL_MODE);
while(PLIB_CAN_OperationModeGet(CAN_ID_1) != CAN_NORMAL_MODE);
5.6.4.4.2.2 Setting Bus Speed
The bus speed at which the CAN node operates is determined by the CAN module clock and the number of Bit Time Quanta
(TQ) assigned to the CAN bit.
The following code snippet shows an example of setting the CAN module clock and CAN bus speed. In this example, the
number of Bit TQ is 10.
/* Configure the CAN Module Clock. The propagation segment, phase segment 1 and phase
segment 2
* are configured to have 3TQ. The CANSetSpeed function sets the baud. The CPU
* core frequency is 80000000 Hz and the desired CAN bus speed is 250000 bps.
*/
PLIB_CAN_PhaseSegment2LengthSet(CAN_ID_1, CAN_TIME_SEGMENT_LEN_3TQ);
PLIB_CAN_PhaseSegment1LengthSet(CAN_ID_1, CAN_TIME_SEGMENT_LEN_3TQ);
PLIB_CAN_PropagationTimeSegmentSet(CAN_ID_1, CAN_TIME_SEGMENT_LEN_3TQ);
PLIB_CAN_PhaseSegment2LengthFreelyProgrammableEnable(CAN_ID_1);
PLIB_CAN_BusLine3TimesSamplingEnable(CAN_ID_1);
PLIB_CAN_SyncJumpWidthSet(CAN_ID_1, CAN_TIME_SEGMENT_LEN_2TQ);
5.6.4.4.2.3 Assigning Buffer Memory
The CAN module requires RAM memory to store received messages and queue message that need to be transmitted. The total
amount of memory required depends on the size of each channel. While each channel has a minimum size of one message
buffer (16 bytes), to simplify usage issues, channels should be used in a sequentially ascending order starting with channel 0.
To better understand the buffer memory requirements of the CAN module, consider the following examples:
Example 1: Two transmit channels (each with eight message buffers) and one full receive channel (with 10 message buffers):
• Two transmit channels with eight message buffers: 2 * 8 * 16 = 256 bytes
• One receive channel with 10 message buffers: 1 * 10 * 16 = 160 bytes
• Total memory required in bytes = 416 bytes
Example 2: Four transmit channels (two with eight message buffers and other two with 10 message buffers) and two full receive
channels (one with 10 message buffers and one with 20 message buffers):
• Two transmit channels with eight message buffers: 2 * 8 * 16 = 256 bytes
• Two transmit channels with 10 message buffers: 2 * 10 * 16 = 320 bytes
• One receive channel with 10 message buffers: 1 * 10 * 16 = 160 bytes
• One receive channel with 20 message buffers: 1 * 20 * 16 = 320 bytes
• Total memory required in bytes = 1056 bytes
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Example 3: One transmit channel (with maximum message buffers) and two receive Channels (one full receive with 10 message
buffers and one data-only channel with maximum message buffers):
• One transmit channel with maximum (32) message buffers: 1 * 32 * 16 = 512 bytes
• One receive channel with 10 message buffers: 1 * 10 * 16 = 160 bytes
• One data-only receive channel with 32 message buffers: 1 * 32 * 8 = 256 bytes
• Total memory required in bytes = 928 bytes
The PLIB_CAN_MemoryBufferAssign function is used to assign a memory buffer to the CAN module, which is shown in the
following example.
/* Assign the buffer area to the CAN module.
* In this case assign enough memory for 2
* channels, each with 8 message buffers.*/
uint8_t MY_CAN_MessageFifoArea[2 * 8 * 16];
PLIB_CAN_MemoryBufferAssign(CAN_ID_1, MY_CAN_MessageFifoArea,(2 * 8 * 16));
5.6.4.4.2.4 Channel Configuration
To transmit and receive CAN messages, the user application must configure channels. The PLIB_CAN_ChannelForTransmitSet
function is used to configure a channel for transmit operation. The PLIB_CAN_ChannelForReceiveSet function is used to
configure a channel for receive operation.
Note: To receive CAN messages, at least one message acceptance filter with a receive channel must be configured.
A CAN Transmit channel can be enabled to process a Remote Transmit Request (RTR). In this case, the transmit channel will
automatically transmit all queued messages when an RTR message is accepted by the CAN module.
The following code shows an example of configuring a CAN Transmit channel.
/* Configure CAN1 Channel 0 for Transmit operation. Allocate 8 message buffer,
* disable the RTR feature and assign low medium priority for transmissions. */
PLIB_CAN_ChannelForTransmitSet(CAN_ID_1, CAN_CHANNEL0, 8, CAN_TX_RTR_DISABLED,
CAN_LOW_MEDIUM_PRIORITY);
A CAN receive channel can be enabled to store the data payload portion of an accepted message. This mode is called the
Data-only mode. The CAN module otherwise stores both the ID and data payload portion of the accepted message.
The following code shows an example of configuring a CAN Receive channel.
/* Configure CAN1 Channel 1 for Receive operation. Allocate 8 message buffers,
* disable the Data-only feature (specify full receive mode). */
PLIB_CAN_ChannelForReceiveSet(CAN_ID_1, CAN_CHANNEL1, 8, CAN_RX_FULL_RECEIVE);
5.6.4.4.2.5 Filters and Masks Configuration
The CAN message acceptance filter allows an application to accept only selected messages from the CAN bus. The CAN
module achieves this by comparing the Standard or Extended ID of a message with the configured filter ID. The message is
accepted on an ID match. The accepted message is stored in the configured destination channel.
The CAN message acceptance filter mask directs the CAN module to ignore specified bits in the filter comparison. This allows
the application to accept messages within an ID range.
At least one filter and one mask must be configured for the CAN module to be able to receive messages. The destination
channel for a filter must be a receive channel unless the channel is a transmit channel with the RTR feature enabled.
The PLIB_CAN_FilterConfigure function is used to configure a message acceptance filter. The PLIB_CAN_FilterMaskConfigure
function is used to configure a message acceptance filter mask. The filter and mask must be linked together to a channel. This is
done using the PLIB_CAN_FilterToChannelLink function. The CAN filter should be enabled to allow messages to be processed.
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This is done using the PLIB_CAN_FilterEnable function.
To better understand how the filter and masks can be used to implement filtering, consider the following code examples:
Example 1: Configure a CAN filter to accept a Standard ID message with ID 0x201
/* Only one message ID is to be accepted. All bits are to be compared
* hence the mask value should be 0x7FF. The message type is Standard ID.
* Configure CAN1, Filter 0, Mask 0 and set the destination channel as
* Channel 1. */
PLIB_CAN_FilterConfigure(CAN_ID_1, CAN_FILTER0, 0x201, CAN_SID);
PLIB_CAN_FilterMaskConfigure(CAN_ID_1, CAN_FILTER_MASK0, 0x7FF, CAN_SID,
CAN_FILTER_MASK_IDE_TYPE);
PLIB_CAN_FilterToChannelLink(CAN_ID_1, CAN_FILTER0, CAN_FILTER_MASK0,
CAN_CHANNEL1);
PLIB_CAN_FilterEnable(CAN_ID_1, CAN_FILTER0);
Example 2: Configure a CAN filter to accept an Extended ID message with ID 0x8004001
/* Only one message ID is to be accepted. All bits are to be compared
* hence the mask value should be 0x8004001. The message type is Extended ID.
* Configure CAN1, Filter 0, Mask 0 and set the destination channel as
* Channel 1. */
PLIB_CAN_FilterConfigure(CAN_ID_1, CAN_FILTER0, 0x8004001, CAN_EID);
PLIB_CAN_FilterMaskConfigure(CAN_ID_1, CAN_FILTER_MASK0, 0x3FFFFFFF, CAN_EID,
CAN_FILTER_MASK_IDE_TYPE);
PLIB_CAN_FilterToChannelLink(CAN_ID_1, CAN_FILTER0, CAN_FILTER_MASK0,
CAN_CHANNEL1);
PLIB_CAN_FilterEnable(CAN_ID_1, CAN_FILTER0);
Example 3: Configure a CAN filter to accept an Extended ID message within ID range 0x8004000 - 0x8004003
/* A message ID range is to be implemented. The 2 least significant bits can be
* ignored. Therefore, the mask value should be 0x3FFFFFFC. The message type is
* Extended ID. Configure CAN1, Filter 0, Mask 0 and set the destination channel
* as Channel 1. */
PLIB_CAN_FilterConfigure(CAN_ID_1, CAN_FILTER0, 0x8004000, CAN_EID);
PLIB_CAN_FilterMaskConfigure(CAN_ID_1, CAN_FILTER_MASK0, 0x3FFFFFFC,
CAN_EID, CAN_FILTER_MASK_IDE_TYPE);
PLIB_CAN_FilterToChannelLink(CAN_ID_1, CAN_FILTER0, CAN_FILTER_MASK0,
CAN_CHANNEL1);
PLIB_CAN_FilterEnable(CAN_ID_1, CAN_FILTER0);
Note: Refer to About CAN Bus Protocol for more information on Standard and Extended ID addressing.
5.6.4.4.2.6 Enabling Events
The CAN module can generate events that indicate the status of the module. Events can be generated at the channel level and
at the module level. Enabling a channel event will cause the CAN module to generate a module level event when the channel
event occurs. Enabling a module event will cause the CAN module to interrupt the CPU.
The following code shows an example of using the PLIB_CAN_ChannelEventEnable and PLIB_CAN_ModuleEventEnable
functions to enable channel and module events.
/* Enable the Receive channel not empty and Receive channel
* full events at the channel level. Enable the Receive event
* at the module level. */
PLIB_CAN_ChannelEventEnable(CAN_ID_1, CAN_CHANNEL1,
(CAN_RX_CHANNEL_NOT_EMPTY|CAN_RX_CHANNEL_FULL));
PLIB_CAN_ModuleEventEnable (CAN_ID_1, CAN_RX_EVENT);
Note: The caller must use the Interrupt Peripheral Library to enable the CAN CPU interrupt.
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5.6.4.4.3 Transmitting a CAN Message
The caller application can transmit a CAN message by queuing the message in a transmit channel, updating the channel, and
then flushing it. Flushing a transmit channel will cause the CAN module to transmit all of the CAN messages that are queued in
the channel.
The PLIB_CAN_TransmitBufferGet function should be used to obtain a CAN_TX_MSG_BUFFER handle type to an empty
message buffer. The application should then populate this buffer. The PLIB_CAN_ChannelUpdate function must be called when
the buffer has been populated. Finally, the PLIB_CAN_TransmitChannelFlush function is called to flush the channel.
The following code shows an example of transmitting an Extended ID message using Channel 0 on the CAN1 module.
CAN_TX_MSG_BUFFER * My_Message;
/* Get a pointer to the next buffer in the Transmit channel
* check if the returned value is null. */
My_Message = PLIB_CAN_TransmitBufferGet(CAN_ID_1, CAN_CHANNEL0);
if(My_Message != NULL)
{
/* Form a Extended ID CAN message. Start by clearing the buffer.
Set the IDE bit to 1 to indicate extended ID message. Clear RTR bit
as this is not a RTR message. */
My_Message->messageWord[0] = 0;
My_Message->messageWord[1] = 0;
My_Message->messageWord[2] = 0;
My_Message->messageWord[3] = 0;
My_Message->msgSID.sid = 0x200;
My_Message->msgEID.eid = 0x4002;
My_Message->msgEID.ide = 1;
My_Message->msgEID.sub_remote_req = 0;
My_Message->msgEID.data_length_code = 1;
My_Message->data[0] = 0xAA;
/* This function lets the CAN module
know that the message processing is done.*/
PLIB_CAN_ChannelUpdate(CAN_ID_1, CAN_CHANNEL0);
/* Direct the CAN module to flush the
Transmit channel. This will send any pending
message in the Transmit channel. */
PLIB_CAN_TransmitChannelFlush(CAN_ID_1, CAN_CHANNEL0);
}
Note: The PLIB_CAN_TransmitBufferGet function will return NULL if the transmit channel is full. In this occurs, the
PLIB_CAN_TransmitChannelFlush function should be called to empty the channel.
The following code shows an example of transmitting a Standard ID message using Channel 0 on the CAN1 module.
CAN_TX_MSG_BUFFER * myMessage;
/* Get a pointer to the next buffer in the channel
check if the returned value is null. */
myMessage = PLIB_CAN_TransmitBufferGet(CAN_ID_1, CAN_CHANNEL0);
if(myMessage != NULL)
{
/* Form a Standard ID CAN message. Start by clearing the buffer.
Send message to the CAN2 module. IDE = 0 means Standard ID message.
Send one byte of data.
*/
myMessage->messageWord[0] = 0;
myMessage->messageWord[1] = 0;
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myMessage->messageWord[2] = 0;
myMessage->messageWord[3] = 0;
myMessage->msgSID.sid = 0x202;
myMessage->msgEID.ide = 0;
myMessage->msgEID.data_length_code = 1;
myMessage->data[0] = 0x23;
/* This function lets the CAN module
know that the message processing is done
and message is ready to be processed. */
PLIB_CAN_ChannelUpdate(CAN_ID_1, CAN_CHANNEL0);
/* Direct the CAN module to flush the
Transmit channel. This will send any pending
message in the Transmit channel. */
PLIB_CAN_TransmitChannelFlush(CAN_ID_1, CAN_CHANNEL0);
}
5.6.4.4.4 Receiving a CAN Message
The caller application can use either the interrupt or polling technique to detect when a message has been received.
The following code shows how the PLIB_CAN_ReceivedMessageGet function can be used to read a received message.
CAN_RX_MSG_BUFFER * message;
message = (CAN_RX_MSG_BUFFER *)PLIB_CAN_ReceivedMessageGet(CAN_ID_1,
CAN_CHANNEL1);
if(message != NULL)
{
//Process the message received
/* Call the PLIB_CAN_ChannelUpdate function to let
the CAN module know that the message processing
is done. */
PLIB_CAN_ChannelUpdate(CAN_ID_1, CAN_CHANNEL1);
}
The PLIB_CAN_ReceivedMessageGet() function returns NULL if the channel is empty.
5.6.4.4.5 Handling Events
The CAN module can generate events at the channel level and at the module level. An enabled channel event will cause a
module event. An enabled module event will cause a CAN CPU interrupt. See Channel Events and Module Events more
information on each type of event.
5.6.4.4.5.1 Channel Events
Each channel in the module has its own set of events. The type of events are common to all channels. While a specific channel
event may be active and can be inspected, it will cause a module event only if the channel event is enabled.
The following code shows an example of enabling and disabling channel events using the PLIB_CAN_ChannelEventEnable
function.
/* CAN 1 Channel 1 and 3 are Transmit channels and Channel 2 and 4 are Receive
channels */
/* Enable Channel 1 empty event and channel not full event. Disable Channel 2 full
and overflow event */
/* Enable all Transmit events on Channel 2 and disable all RX events on Channel 4 */
PLIB_CAN_ChannelEventEnable(CAN_ID_1, CAN_CHANNEL1,
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(CAN_TX_CHANNEL_EMPTY | CAN_TX_CHANNEL_NOT_FULL));
PLIB_CAN_ChannelEventEnable(CAN_ID_1, CAN_CHANNEL2,
(CAN_RX_CHANNEL_FULL | CAN_RX_CHANNEL_OVERFLOW));
PLIB_CAN_ChannelEventEnable(CAN_ID_1, CAN_CHANNEL3, CAN_TX_CHANNEL_ANY_EVENT);
PLIB_CAN_ChannelEventEnable(CAN_ID_1, CAN_CHANNEL4, CAN_RX_CHANNEL_ANY_EVENT);
The PLIB_CAN_ModuleEventGet function can be used to check if a specific event is active in a specific channel.
It is only necessary for the event to be active and not enabled for this to work, as shown in the following code example.
// Check if RX Channel 2 of CAN module 1 is not empty or if its full.
CAN_CHANNEL_EVENT channelEvent;
channelEvent = PLIB_CAN_ChannelEventGet(CAN_ID_1, CAN_CHANNEL2);
if((channelEvent & (CAN_RX_CHANNEL_NOT_EMPTY | CAN_RX_CHANNEL_FULL)) != 0)
{
// This means that either RX Channel 2 is not empty
// or the Channel is full.
}
If a channel event is enabled and is active, it will set a channel event status flag. This flag indicates that some event in the
channel is active.
The following code example shows how the PLIB_CAN_AllChannelEventsGet function is used to check if any channel event is
active.
/* Check if RX Channel 2 of CAN module 1 is not empty or if its full */
CAN_CHANNEL_EVENT channelEvent;
channelEvent = PLIB_CAN_ChannelEventGet(CAN_ID_1, CAN_CHANNEL2);
if((channelEvent & (CAN_RX_CHANNEL_NOT_EMPTY | CAN_RX_CHANNEL_FULL)) != 0)
{
// This means that either RX Channel 2 is not empty
// or the Channel is full.
}
A receive channel overflow condition is special channel event and is available as a module event as well. The
PLIB_CAN_AllChannelOverflowStatusGet function returns the status of all channels that have an active overflow event. Only
channels with enabled overflow events will be reflected.
The following code shows an example of how this function is used.
/* Check if Channel 2 or 3 of CAN module 1 have any active events */
CAN_CHANNEL_MASK channelEvents;
channelEvents = PLIB_CAN_AllChannelEventsGet(CAN_ID_1);
if((channelEvents & (CAN_CHANNEL2_MASK | CAN_CHANNEL3_MASK)) != 0)
{
// Either Channel 2 or 3 has an active event.
// The PLIB_CAN_ChannelEventGet function can be
// used to query the channel for more details.
}
5.6.4.4.5.2 Module Events
The CAN module has various sources of events, which includes the channel events. The PLIB_CAN_ModuleEventEnable
function can be used to enable and disable module level events. Enabling a module event will cause the CAN module to
generate a CPU interrupt, as shown in the following code example.
// Enable CAN1 module Transmit Event and Receive Events.
// Disable Receive Overflow event and operation
// mode change event.
PLIB_CAN_ModuleEventEnable(CAN_ID_1, (CAN_TX_EVENT | CAN_RX_EVENT));
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PLIB_CAN_ModuleEventDisable(CAN_ID_1,
(CAN_OPERATION_MODE_CHANGE_EVENT | CAN_RX_OVERFLOW_EVENT));
The PLIB_CAN_ModuleEventGet function can be used to check if any module level events are active. This is shown in the code
snippet below.
// Check if the CAN Module 1 Receive event
// or if Transmit event is active
if((PLIB_CAN_ModuleEventGet(CAN_ID_1) & (CAN_RX_EVENT | CAN_TX_EVENT)) != 0)
{
// Handle the Receive or Transmit module Event here.
}
The CAN module also provides code to indicate the highest priority pending event in the CAN module. The
PLIB_CAN_PendingEventsGet function can be used to read and analyze this code, as shown in the following code example.
/* Implement a switch to check and process any active CAN module events */
CAN_EVENT_CODE eventCode;
eventCode = PLIB_CAN_PendingEventsGet(CAN_ID_1);
switch(eventCode)
{
case CAN_NO_EVENT:
/* Procedure to handle no CAN events */
break;
case CAN_WAKEUP_EVENT:
/* Procedure to handle device wake-up on CAN bus activity event */
break;
default:
break;
}
5.6.4.4.6 Using the Library
This topic describes the basic architecture of the CAN Peripheral Library and provides information and examples on how to use it.
Interface Header File: plib_can.h
The interface to the CAN Peripheral library is defined in the "plib_can.h" header file. Any C language source (.c) file that uses the
CAN Peripheral library should include "peripheral.h".
Library File:
The CAN Peripheral library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the Peripheral interacts with the framework.
5.6.4.4.6.1 Hardware Abstraction Model
Note: The interface provided is a super set of all of the functionality of the available CAN on the device. Refer to the specific
device data sheet or the related family reference manual to determine the set of functions that are supported for each CAN
module on the device.
This library provides the low-level abstraction of the CAN module on the Microchip family of microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in the software and introduces the library interface.
CAN Software Abstraction Block Diagram
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Software Model:
The CAN Peripheral Library provides interface routines to interact with the blocks shown in the diagram above. A channel can be
either a transmit channel or a receive channel. The size of a CAN message is typically 16 bytes (8 bytes for data-only receive
messages). The size of a channel (the number of messages it can buffer) is configurable. Each channel has a minimum size of
one message buffer. The message buffer area for all channels is assigned at configuration time. The CAN Peripheral Library
then provides access to these channels and buffers via the library interface.
The user code must enable and configure message acceptance filters to receive messages. These filters compare the ID field of
the incoming message with configured value and accepts the messages if IDs match. The message is then stored in a selectable
receive channel. At least one message acceptance filter and one filter mask should be enabled for the CAN module to receive
messages. A filter mask allows specified filter bits to be ignored during the comparison process. This allows the filter to accept a
message with an ID range.
The CAN Peripheral Library allows the CAN module to generate events. Events can be generated at the channel level and at the
module level.
Events:
The CAN module is capable of notifying the user application when specific events occur in the module. The following diagram
shows these events and how they are organized.
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There are two types of events in the CAN module: Channel events and Module events. Channel events are generated by
transmit and receive channels. Module events are generated by various sources (including channels) within the CAN module.
Each event can be enabled or disabled. Enabling a channel event will cause the CAN module to generate a module event. An
enabled module level event will cause the CAN module to generate an interrupt to the CPU.
The application can also poll channel events to check if these are active. This may be done in cases where a polling scheme
(rather than an interrupt scheme) needs to be implemented. In this case, the CAN module provides events status on a channel
basis. If a channel event is found active, the application can then use library API calls to inspect which channel condition caused
the channel event.
5.6.4.4.6.2 Library Overview
The library interface routines are divided into various subsections, each of the sub section addresses one of the blocks or the
overall operation of the CAN module.
Library Interface Section Description
Basic Configuration APIs that are used for basic control of the module, such as enabling and
disabling the module.
Advanced Configuration Advance configuration, such as selection of the operation mode.
Bus Speed Configuration Bus speed configuration.
Event Management APIs to manage the events.
Message Transmit Functions Transmit APIs.
Message Receive Functions APIs that are related to data reception.
Error State Tracking Error tracking.
Information Functions Information about the module.
5.6.4.4.7 Configuring the Library
The library is configured for the supported processor when the processor is chosen in the MPLAB IDE.
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5.6.4.5 Library Interface
Data Types and Constants
Name Description
CAN_CHANNEL Identifies the supported CAN Channels.
CAN_CHANNEL_EVENT Identifies all Layer 3 interrupts.
CAN_CHANNEL_MASK Lists the series of useful masks.
CAN_DNET_FILTER_SIZE Specifies the size of the DeviceNet filter.
CAN_ERROR_STATE Specifies the CAN module error states.
CAN_FILTER CAN event code returned by the CAN module.
CAN_FILTER_MASK Identifies the available CAN filter masks.
CAN_FILTER_MASK_TYPE Specifies the CAN filter mask type.
CAN_FUNCTONAL_MODES Lists all possible CAN module functional modes.
CAN_ID_TYPE Specifies the CAN ID type.
CAN_MODULE_EVENT Specifies the CAN module events
CAN_MODULE_ID Enumeration: CAN_MODULE_ID
This enumeration defines the number of modules that are available on
the microcontroller. This is the super set of all the possible instances that
might be available on Microchip microcontrollers.
Refer to the specific device data sheet to get the correct number of
modules defined for the desired microcontroller.
CAN_MSG_EID Defines the structure of the EID word section of the transmit and receive
message.
CAN_OPERATION_MODES Lists all possible CAN module operational modes.
CAN_RECEIVE_CHANNEL Lists all possible CAN module receive channels.
CAN_RECEIVE_MODES Lists all possible CAN module receive modes.
CAN_RX_DATA_MODE Enables the Data-only Receive mode or Full Receive mode of a CAN
receive channel.
CAN_RX_MSG_BUFFER Defines the structure of the CAN receive message buffer
CAN_RX_MSG_SID Defines the structure of the SID word section of the receive message.
CAN_TIME_SEGMENT_LENGTH All possible values for the assignable number of Time Quanta.
CAN_TX_CHANNEL_STATUS Identifies possible transmit channel-specific conditions.
CAN_TX_MSG_BUFFER Defines the structure of the CAN transmit message buffer.
CAN_TX_MSG_SID Defines the structure of the SID word section of the transmit message.
CAN_TX_RTR Specifies the status of the CAN Remote Transmit Request (RTR) feature
for a CAN transmit channel.
CAN_TXCHANNEL_PRIORITY Specifies the priority of a transmit channel.
CAN_RX_DATA_ONLY_SIZE_BYTES Used as the size of the CAN data-only receive message buffer in bytes.
CAN_TX_RX_MESSAGE_SIZE_BYTES Used as the array size of the CAN transmit and full receive message
buffer.
Advanced Configuration
Name Description
PLIB_CAN_ChannelResetIsComplete Returns 'true' if the specified channel reset is complete.
PLIB_CAN_DeviceNetConfigure Configures the CAN module DeviceNet(TM) filter feature.
PLIB_CAN_FunctionalModeGet Obtains the functional mode of the CAN module.
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PLIB_CAN_MemoryBufferAssign Assigns buffer memory to the CAN module.
PLIB_CAN_TimeStampPrescalarSet Sets the CAN receive message time stamp timer prescalar.
PLIB_CAN_TimeStampValueGet Returns the current value of the CAN receive message time stamp timer
value.
PLIB_CAN_TimeStampValueSet Sets the CAN receive message time stamp timer value.
PLIB_CAN_FunctionalModeSelect Selects the functional mode of the CAN module.
Basic Configuration
Name Description
PLIB_CAN_BusActivityWakeupDisable Disables the wake-up on bus activity receive line filter.
PLIB_CAN_BusActivityWakeupEnable Enables the wake-up on bus activity receive line filter.
PLIB_CAN_Disable Disables the specified CAN module.
PLIB_CAN_Enable Enables the specified CAN module.
PLIB_CAN_IsActive Returns 'true' if the CAN module is active.
PLIB_CAN_OperationModeGet Obtains the current CAN operating mode.
PLIB_CAN_OperationModeSelect Sets the CAN operating mode.
PLIB_CAN_StopInIdleDisable Disables the Stop in Idle feature.
PLIB_CAN_StopInIdleEnable Enables the CAN module to stop when the processor enters Idle mode.
PLIB_CAN_TimeStampDisable Disables the time stamp feature for the CAN module.
PLIB_CAN_TimeStampEnable Enables the time stamp feature for the CAN module.
Bus Speed Configuration
Name Description
PLIB_CAN_BusLine3TimesSamplingDisable Disables the bus line three times sampling.
PLIB_CAN_BusLine3TimesSamplingEnable Enables the bus line three times sampling.
PLIB_CAN_PhaseSegment1LengthSet Selects the CAN phase buffer segment1 length.
PLIB_CAN_PhaseSegment2LengthFreelyProgrammableDisable Disables the CAN phase buffer segment2 length
freely programmable mode.
PLIB_CAN_PhaseSegment2LengthFreelyProgrammableEnable Makes the CAN phase buffer segment2 length
freely programmable.
PLIB_CAN_PhaseSegment2LengthSet Selects the CAN phase buffer segment2 length.
PLIB_CAN_PropagationTimeSegmentSet Selects the propagation time segment.
PLIB_CAN_SyncJumpWidthSet Selects the synchronization jump width.
Channel Configuration
Name Description
PLIB_CAN_ChannelForReceiveSet Configures a CAN channel for receive operation.
PLIB_CAN_ChannelForTransmitSet Configures a CAN channel for transmission.
PLIB_CAN_ChannelReset Resets a CAN channel.
PLIB_CAN_ChannelUpdate Updates the CAN Channel internal pointers.
PLIB_CAN_ChannelEventDisable Enables channel level events.
Error State Tracking
Name Description
PLIB_CAN_ReceiveErrorCountGet Returns the CAN receive error count.
PLIB_CAN_ErrorStateGet Returns the CAN error status word.
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Event Management
Name Description
PLIB_CAN_ModuleEventClear Clears the CAN module level events.
PLIB_CAN_ModuleEventDisable Disables the module level events.
PLIB_CAN_ModuleEventEnable Enables the module level events.
PLIB_CAN_ModuleEventGet Returns the status of the CAN module events.
PLIB_CAN_AllChannelEventsGet Returns a value representing the event status of all CAN channels.
PLIB_CAN_AllChannelOverflowStatusGet Returns a value representing the receive overflow event status of all
CAN channels.
PLIB_CAN_ChannelEventClear Clears CAN channel events.
PLIB_CAN_ChannelEventEnable Enables channel level events.
PLIB_CAN_ChannelEventGet Returns a value representing the event status of a CAN channel.
PLIB_CAN_PendingEventsGet Returns a value representing the highest priority active event in the
module.
Feature Existance Routines
Name Description
PLIB_CAN_ExistsActiveStatus Identifies whether the ActiveStatus feature exists
on the CAN module.
PLIB_CAN_ExistsAllChannelEvents Identifies whether the AllChannelEvents feature
exists on the CAN module.
PLIB_CAN_ExistsAllChannelOverflow Identifies whether the AllChannelOverflow feature
exists on the CAN module.
PLIB_CAN_ExistsBusActivityWakeup Identifies whether the BusActivityWakeup feature
exists on the CAN module.
PLIB_CAN_ExistsBusLine3TimesSampling Identifies whether the BusLine3TimesSampling
feature exists on the CAN module.
PLIB_CAN_ExistsChannelEvent Identifies whether the ChannelEventGet feature
exists on the CAN module.
PLIB_CAN_ExistsChannelEventEnable Identifies whether the ChannelEventEnable feature
exists on the CAN module.
PLIB_CAN_ExistsChannelForReceiveSet Identifies whether the ChannelForReceiveSet
feature exists on the CAN module.
PLIB_CAN_ExistsChannelForTransmitSet Identifies whether the ChannelForTransmitSet
feature exists on the CAN module.
PLIB_CAN_ExistsChannelReset Identifies whether the ChannelReset feature exists
on the CAN module.
PLIB_CAN_ExistsChannelUpdate Identifies whether the ChannelUpdate feature
exists on the CAN module.
PLIB_CAN_ExistsDeviceNet Identifies whether the DeviceNet feature exists on
the CAN module.
PLIB_CAN_ExistsEnableControl Identifies whether the EnableControl feature exists
on the CAN module.
PLIB_CAN_ExistsErrorState Identifies whether the ErrorStateGet feature exists
on the CAN module.
PLIB_CAN_ExistsFilterConfigure Identifies whether the FilterConfigure feature exists
on the CAN module.
PLIB_CAN_ExistsFilterEnable Identifies whether the FilterEnable feature exists
on the CAN module.
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PLIB_CAN_ExistsFilterMaskConfigure Identifies whether the FilterMaskConfigure feature
exists on the CAN module.
PLIB_CAN_ExistsFilterToChannelLink Identifies whether the FilterToChannelLink feature
exists on the CAN module.
PLIB_CAN_ExistsFunctionalMode Identifies whether the FunctionalModeSelect
feature exists on the CAN module.
PLIB_CAN_ExistsLatestFilterMatchGet Identifies whether the LatestFilterMatchGet feature
exists on the CAN module.
PLIB_CAN_ExistsMemoryBufferAssign Identifies whether the MemoryBufferAssign feature
exists on the CAN module.
PLIB_CAN_ExistsMessageIsReceived Identifies whether the MessageIsReceived feature
exists on the CAN module.
PLIB_CAN_ExistsModuleEventClear Identifies whether the ModuleEvents feature exists
on the CAN module.
PLIB_CAN_ExistsModuleEventEnable Identifies whether the ModuleEventEnable feature
exists on the CAN module.
PLIB_CAN_ExistsModuleInfo Identifies whether the ModuleInformation feature
exists on the CAN module.
PLIB_CAN_ExistsOperationModeRead Identifies whether the OperationModeRead feature
exists on the CAN module.
PLIB_CAN_ExistsOperationModeWrite Identifies whether the OperationModeSet feature
exists on the CAN module.
PLIB_CAN_ExistsPendingEventsGet Identifies whether the PendingEventsGet feature
exists on the CAN module.
PLIB_CAN_ExistsPendingTransmissionsAbort Identifies whether the PendingTransmissionsAbort
feature exists on the CAN module.
PLIB_CAN_ExistsPhaseSegment1Length Identifies whether the PhaseSegment1Length
feature exists on the CAN module.
PLIB_CAN_ExistsPhaseSegment2Length Identifies whether the PhaseSegment2Length
feature exists on the CAN module.
PLIB_CAN_ExistsPhaseSegment2LengthFreelyProgrammable Identifies whether the
PhaseSegment2LengthFreelyProgrammable
feature exists on the CAN module.
PLIB_CAN_ExistsPropagationTimeSegment Identifies whether the PropagationTimeSegment
feature exists on the CAN module.
PLIB_CAN_ExistsReceiveBufferClear Identifies whether the ReceiveBufferClear feature
exists on the CAN module.
PLIB_CAN_ExistsReceiveBufferIsEmpty Identifies whether the ReceiveBufferIsEmpty
feature exists on the CAN module.
PLIB_CAN_ExistsReceivedMessageGet Identifies whether the ReceivedMessageGet
feature exists on the CAN module.
PLIB_CAN_ExistsReceiveErrorCount Identifies whether the ReceiveErrorCount feature
exists on the CAN module.
PLIB_CAN_ExistsReceiveModeSelect Identifies whether the ReceiveModeSelect feature
exists on the CAN module.
PLIB_CAN_ExistsRemoteTransmitReq Identifies whether the RemoteTransmitReq feature
exists on the CAN module.
PLIB_CAN_ExistsRxFIFOFourLeftNotify Identifies whether the RxFIFOFourLeftNotify
feature exists on the CAN module.
PLIB_CAN_ExistsRxFIFOOneLeftNotify Identifies whether the RxFIFOOneLeftNotify
feature exists on the CAN module.
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PLIB_CAN_ExistsStopInIdle Identifies whether the StopInIdle feature exists on
the CAN module.
PLIB_CAN_ExistsSyncJumpWidthSet Identifies whether the SyncJumpWidth feature
exists on the CAN module.
PLIB_CAN_ExistsTimeStampEnable Identifies whether the TimeStampEnable feature
exists on the CAN module
PLIB_CAN_ExistsTimeStampPrescalar Identifies whether the TimeStampPrescalar feature
exists on the CAN module.
PLIB_CAN_ExistsTimeStampValue Identifies whether the TimeStampValue feature
exists on the CAN module.
PLIB_CAN_ExistsTransmissionIsAborted Identifies whether the TransmissionAbortStatus
feature exists on the CAN module.
PLIB_CAN_ExistsTransmitBufferGet Identifies whether the TransmitBufferGet feature
exists on the CAN module.
PLIB_CAN_ExistsTransmitChannelFlush Identifies whether the TransmitChannelFlush
feature exists on the CAN module.
PLIB_CAN_ExistsTransmitChannelStatus Identifies whether the TransmitChannelStatus
feature exists on the CAN module.
PLIB_CAN_ExistsTransmitErrorCountGet Identifies whether the TransmitErrorCountGet
feature exists on the CAN module.
Information Functions
Name Description
PLIB_CAN_TotalChannelsGet Returns the total number of CAN channels per CAN module.
PLIB_CAN_TotalFiltersGet Returns the total number of CAN Filters per CAN module.
PLIB_CAN_TotalMasksGet Returns the total number of CAN masks per CAN module.
Message Filtering Functions
Name Description
PLIB_CAN_FilterConfigure Configures a CAN message acceptance filter.
PLIB_CAN_FilterDisable Disables a CAN message acceptance filter.
PLIB_CAN_FilterEnable Enables a CAN message acceptance filter.
PLIB_CAN_FilterIsDisabled Returns 'true' if the specified filter is disabled.
PLIB_CAN_FilterMaskConfigure Configures a CAN filter mask.
PLIB_CAN_FilterToChannelLink Links a filter to a channel.
PLIB_CAN_LatestFilterMatchGet Returns the index of the filter that accepted the latest message.
Message Receive Functions
Name Description
PLIB_CAN_ReceivedMessageGet Returns a pointer to a message to be read from the CAN channel.
PLIB_CAN_RxFIFOFourLeftNotify Configures the module to generate an interrupt when the FIFO has
four receive buffers left.
PLIB_CAN_RxFIFOOneLeftNotify Configures the module to generate an interrupt when the FIFO has
only one receive buffer left.
PLIB_CAN_ReceiveModeSelect Selects the receive mode of the CAN module.
PLIB_CAN_ReceiveModeGet Obtains the receive mode of the CAN module.
PLIB_CAN_MessageIsReceived Returns whether a message was received and the receive buffer is
not empty.
PLIB_CAN_ReceiveBufferIsEmpty Returns whether the receive buffer of the specified channel is empty.
PLIB_CAN_ReceiveBufferClear Clears the received message flag.
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PLIB_CAN_RemoteTransmitReqIsReceived Returns whether the message received is a remote transmit request.
Message Transmit Functions
Name Description
PLIB_CAN_PendingTransmissionsAbort Aborts any pending transmit operations.
PLIB_CAN_TransmissionIsAborted Returns 'true' if the transmit abort operation is complete.
PLIB_CAN_TransmitBufferGet Returns a pointer to an empty transmit buffer.
PLIB_CAN_TransmitChannelFlush Causes all messages in the specified transmit channel to be transmitted.
PLIB_CAN_TransmitChannelStatusGet Returns the condition of the transmit channel.
PLIB_CAN_TransmitErrorCountGet Returns the CAN transmit error count
Description
This section describes the APIs of the CAN Peripheral. Refer to each section for a detailed description.
5.6.4.5.1 Basic Configuration
5.6.4.5.1.1 PLIB_CAN_BusActivityWakeupDisable Function
C
void PLIB_CAN_BusActivityWakeupDisable(
CAN_MODULE_ID index
);
Description
This function disables the Wake up on bus activity receive line filter.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsBusActivityWakeup in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
PLIB_CAN_BusActivityWakeupDisable(MY_CAN_ID);
5.6.4.5.1.2 PLIB_CAN_BusActivityWakeupEnable Function
C
void PLIB_CAN_BusActivityWakeupEnable(
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CAN_MODULE_ID index
);
Description
This function enables the wake-up on bus activity receive line filter.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsBusActivityWakeup in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
PLIB_CAN_BusActivityWakeupEnable(MY_CAN_ID);
5.6.4.5.1.3 PLIB_CAN_Disable Function
C
void PLIB_CAN_Disable(
CAN_MODULE_ID index
);
Description
This function disables the specified CAN module.
Preconditions
None
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
If the user application clears this bit, it may take a number of cycles before the CAN module completes the current transaction
and responds to this request. The user application should check this using the PLIB_CAN_IsActive function to verify that the
request has been honored.
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This function works only if the CAN module is in Configuration mode. Use the PLIB_CAN_OperationModeGet function to get the
current mode and the PLIB_CAN_OperationModeSelect function to change the mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsEnableControl in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
PLIB_CAN_Disable(MY_CAN_ID);
5.6.4.5.1.4 PLIB_CAN_Enable Function
C
void PLIB_CAN_Enable(
CAN_MODULE_ID index
);
Description
This function enables the specified CAN module.
Preconditions
The module should be appropriately configured before being enabled.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
Some of the CAN module settings can be done only when the module is off. Therefore, always call the PLIB_CAN_Enable
Function after all other configurations are complete.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsEnableControl in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
//Do all the other configurations before enabling.
PLIB_CAN_Enable(MY_CAN_ID);
5.6.4.5.1.5 PLIB_CAN_IsActive Function
C
bool PLIB_CAN_IsActive(
CAN_MODULE_ID index
);
Description
This function returns 'true' if the CAN module is active. This function is typically called after the CAN module is disabled using the
PLIB_CAN_Disable function. The CAN module disable request does not complete immediately when requested and depends on
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the CAN bus status. This function should be called to check whether the module disable is completed.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
• true = The module is still active
• false = The module is completely disabled
Remarks
The CAN module disable operation should not be confused with placing the CAN module in the Disable mode using the
PLIB_CAN_OperationModeSelect function. The Disable mode is one of the operating modes of the CAN module. The CAN
module is still enabled while in Disable mode. The module disable operation switches the CAN module off.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsActiveStatus in your application to determine whether this feature is available.
Example
// Disable CAN module 1. Wait until the module is completely disabled.
PLIB_CAN_Disable(CAN_ID_1);
while(PLIB_CAN_IsActive(CAN_ID_1) == true);
5.6.4.5.1.6 PLIB_CAN_OperationModeGet Function
C
CAN_OPERATION_MODES PLIB_CAN_OperationModeGet(
CAN_MODULE_ID index
);
Description
This function obtains the current CAN operating mode. This function is typically called after the
PLIB_CAN_OperationModeSelect function to check if the requested operation mode change is complete.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
The current CAN_OP_MODE type of operation mode of the CAN module.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsOperationModeRead in your application to determine whether this feature is available.
Example
// Check and wait until the CAN module is in Disable Mode.
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while(PLIB_CAN_OperationModeGet(CAN_ID_1) != CAN_DISABLE_MODE);
5.6.4.5.1.7 PLIB_CAN_OperationModeSelect Function
C
void PLIB_CAN_OperationModeSelect(
CAN_MODULE_ID index,
CAN_OPERATION_MODES opMode
);
Description
This function sets the CAN operating mode. The CAN module requires itself to be in certain modes to gain access to module
functionality. For example, the module should be in Normal mode to send and receive messages. Note that after this function is
called, it should be checked to determine whether the mode was set by using the PLIB_CAN_OperationModeGet function.
Preconditions
None.
Parameters
Parameters Description
module Identifies the desired CAN module
opMode Desired CAN_OP_MODE type of the mode to be set
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsOperationModeWrite in your application to determine whether this feature is available.
Example
// Set the CAN_ID_1 operating mode to Configuration mode.
PLIB_CAN_OperationModeSelect(CAN_ID_1, CAN_CONFIGURATION_MODE);
5.6.4.5.1.8 PLIB_CAN_StopInIdleDisable Function
C
void PLIB_CAN_StopInIdleDisable(
CAN_MODULE_ID index
);
Description
This function disables the CAN module from stopping operation when the system enters Idle mode. The module continues
operation when the system enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
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Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsStopInIdle in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
PLIB_CAN_StopInIdleDisable(MY_CAN_ID);
5.6.4.5.1.9 PLIB_CAN_StopInIdleEnable Function
C
void PLIB_CAN_StopInIdleEnable(
CAN_MODULE_ID index
);
Description
This function configures the CAN module to stop operation when the system enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsStopInIdle in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
PLIB_CAN_StopInIdleEnable(MY_CAN_ID);
5.6.4.5.1.10 PLIB_CAN_TimeStampDisable Function
C
void PLIB_CAN_TimeStampDisable(
CAN_MODULE_ID index
);
Description
This function disables time stamp capture feature for the CAN module. This conserves power by stopping the CAN timer.
Preconditions
None
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Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsTimeStampEnable in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
PLIB_CAN_TimeStampDisable(MY_CAN_ID);
5.6.4.5.1.11 PLIB_CAN_TimeStampEnable Function
C
void PLIB_CAN_TimeStampEnable(
CAN_MODULE_ID index
);
Description
This function enables the time stamp capture feature for the CAN module. The CAN timer value will be stored on valid message
reception and is stored with the message.
Preconditions
None
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsTimeStampEnable in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
PLIB_CAN_TimeStampEnable(MY_CAN_ID);
5.6.4.5.2 Advanced Configuration
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5.6.4.5.2.1 PLIB_CAN_ChannelResetIsComplete Function
C
bool PLIB_CAN_ChannelResetIsComplete(
CAN_MODULE_ID index,
CAN_CHANNEL channel
);
Description
This function returns 'true' if the specified channel reset is complete. This function should preferably be called after calling the
PLIB_CAN_ChannelReset function.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the CAN Channel to be inspected for reset
Returns
• true = Channel reset is complete
• false = Channel reset is in progress
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsChannelReset in your application to determine whether this feature is available.
Example
// Reset channel 4 of CAN_ID_1 module
// and wait until the reset is complete
PLIB_CAN_ChannelReset(CAN_ID_1,CAN_CHANNEL4);
while(PLIB_CAN_ChannelResetIsComplete(CAN_ID_1,CAN_CHANNEL4) != true);
5.6.4.5.2.2 PLIB_CAN_DeviceNetConfigure Function
C
void PLIB_CAN_DeviceNetConfigure(
CAN_MODULE_ID index,
CAN_DNET_FILTER_SIZE dncnt
);
Description
This function configures the CAN module DeviceNet filter feature. DeviceNet filtering allows a portion of the data payload to be
used as a filter criteria. This function allows the size of this filter to be configured in bits. The filter can also be disabled.
Preconditions
The CAN module should preferably be in Configuration mode (using the PLIB_CAN_OperationModeSelect function).
Parameters
Parameters Description
index Identifies the desired CAN module
dncnt Specifies the CAN_DNET_FILTER_SIZE size of the DeviceNet filter in bits
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsDeviceNet in your application to determine whether this feature is available.
Example
// Disable the CAN_ID_1 DeviceNet filter feature.
PLIB_CAN_DeviceNetConfigure(CAN_ID_1, CAN_DNET_FILTER_DISABLE);
// Set the CAN_ID_2 Device Net Filter Size to 10 bits.
PLIB_CAN_DeviceNetConfigure(CAN_ID_2, CAN_DNET_FILTER_SIZE_10_BIT);
5.6.4.5.2.3 PLIB_CAN_FunctionalModeGet Function
C
CAN_FUNCTONAL_MODES PLIB_CAN_FunctionalModeGet(
CAN_MODULE_ID index
);
Description
This function obtains the functional mode of the CAN module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsFunctionalMode in your application to determine whether this feature is available.
Example
CAN_FUNCTONAL_MODES funcMode;
funcMode = PLIB_CAN_FunctionalModeGet(CAN_ID_1);
5.6.4.5.2.4 PLIB_CAN_MemoryBufferAssign Function
C
void PLIB_CAN_MemoryBufferAssign(
CAN_MODULE_ID index,
void * buffer,
int sizeInBytes
);
Description
This function assigns buffer memory to the CAN module. The CAN module uses this buffer memory to store messages to be
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transmitted and received. The size of the memory buffer should be enough to accommodate the required number of message
buffers and channels.
Preconditions
The module should be in Configuration mode (using the PLIB_CAN_OperationModeSelect function).
Parameters
Parameters Description
index Identifies the desired CAN module
buffer Pointer to the buffer memory area
sizeInBytes Size of the buffer memory is bytes
Returns
None.
Remarks
This API is useful only if the CAN module uses device RAM for message buffers and message FIFO location is software
configurable. This should not be used if the device message buffer is part of SFR.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsMemoryBufferAssign in your application to determine whether this feature is available.
Example
// Define and assign a CAN 1 memory buffer for 2 Transmit channels and 1 Receive
// channel, each with 4 message buffers
uint8_t canMemoryBuffer [3 * 4 * CAN_TX_RX_MESSAGE_SIZE_BYTES];
PLIB_CAN_MemoryBufferAssign(CAN_ID_1, canMemoryBuffer, (3 * 4 *
CAN_TX_RX_MESSAGE_SIZE_BYTES));
5.6.4.5.2.5 PLIB_CAN_TimeStampPrescalarSet Function
C
void PLIB_CAN_TimeStampPrescalarSet(
CAN_MODULE_ID index,
unsigned prescalar
);
Description
This function sets the CAN receive message time stamp timer prescalar. This prescalar determines the rate at the which the time
stamp timer is incremented. For example, if the prescalar value is 0xFF, the time stamp timer is incremented by 1 every 255
system clock periods.
Preconditions
None.
Parameters
Parameters Description
module Identifies the desired CAN module
prescalar Prescalar for the CAN receive message time stamp timer. This value should be
between 0x0 and 0xFFFF.
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsTimeStampPrescalar in your application to determine whether this feature is available.
Example
// Set the CAN_ID_1 Receive Message Time Stamp Timer prescalar to increment
//the Timestamp Timer every 1024 system clock periods.
PLIB_CAN_TimeStampPrescalarSet(CAN_ID_1, 1024);
5.6.4.5.2.6 PLIB_CAN_TimeStampValueGet Function
C
unsigned PLIB_CAN_TimeStampValueGet(
CAN_MODULE_ID index
);
Description
This function gets the current value of the CAN receive message time stamp timer value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
The current value of the CAN receive message time stamp timer.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsTimeStampValue in your application to determine whether this feature is available.
Example
unsigned int timeStampTimerVal;
// Get the current time stamp timer value.
timeStampTimerVal = PLIB_CAN_TimeStampValueGet(CAN_ID_1);
5.6.4.5.2.7 PLIB_CAN_TimeStampValueSet Function
C
void PLIB_CAN_TimeStampValueSet(
CAN_MODULE_ID index,
unsigned value
);
Description
This function sets the CAN receive message time stamp timer value. The timer will then start counting up from this value.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired CAN module
value Start value of the receive message yime stamp timer. This value should be
between 0x0 and 0xFFFF.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsTimeStampValue in your application to determine whether this feature is available.
Example
// Set start value of CAN_ID_1 Receive Message Time Stamp Timer to 0x100
PLIB_CAN_TimeStampValueSet(CAN_ID_1, 0x0100);
5.6.4.5.2.8 PLIB_CAN_FunctionalModeSelect Function
C
void PLIB_CAN_FunctionalModeSelect(
CAN_MODULE_ID index,
CAN_FUNCTONAL_MODES funcMode
);
Description
This function selects the functional mode of the CAN module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
funcMode Select the functional mode of the CAN module. One of the possible values from
CAN_FUNCTIONAL_MODES
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsFunctionalMode in your application to determine whether this feature is available.
Example
PLIB_CAN_FunctionalModeSelect(CAN_ID_1, CAN_LEGACY_MODE0);
5.6.4.5.3 Bus Speed Configuration
5.6.4.5.3.1 PLIB_CAN_BusLine3TimesSamplingDisable Function
C
void PLIB_CAN_BusLine3TimesSamplingDisable(
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CAN_MODULE_ID index
);
Description
The bus line will be sampled only once at the sampling point.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This function works only if the CAN module is in Configuration mode. Use the PLIB_CAN_OperationModeGet function to get the
current mode and the PLIB_CAN_OperationModeSelect function to change the mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsBusLine3TimesSampling in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
if (CAN_CONFIGURATION_MODE != PLIB_CAN_OperationModeGet(MY_CAN_ID))
{
PLIB_CAN_BusLine3TimesSamplingDisable(MY_CAN_ID);
}
5.6.4.5.3.2 PLIB_CAN_BusLine3TimesSamplingEnable Function
C
void PLIB_CAN_BusLine3TimesSamplingEnable(
CAN_MODULE_ID index
);
Description
The bus line will be sampled three times at the sampling point. If this is disabled, the bus line will be sampled only once.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
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This function works only if the CAN module is in Configuration mode. Use the PLIB_CAN_OperationModeGet function to get the
current mode and the PLIB_CAN_OperationModeSelect function to change the mode.
This API may not function if the baud rate prescalar value is more than a certain limit. Refer to the specific device data sheet to
determine the maximum prescalar that allows three times sampling.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsBusLine3TimesSampling in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
if (CAN_CONFIGURATION_MODE != PLIB_CAN_OperationModeGet(MY_CAN_ID))
{
PLIB_CAN_BusLine3TimesSamplingEnable(MY_CAN_ID);
}
5.6.4.5.3.3 PLIB_CAN_PhaseSegment1LengthSet Function
C
void PLIB_CAN_PhaseSegment1LengthSet(
CAN_MODULE_ID index,
CAN_TIME_SEGMENT_LENGTH length
);
Description
This function selects the CAN phase buffer segment1 length.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
length Desired segment length
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This function works only if the CAN module is in configuration mode. Use the PLIB_CAN_OperationModeGet function to get the
current mode and the PLIB_CAN_OperationModeSelect function to change the mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsPhaseSegment1Length in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
if (CAN_CONFIGURATION_MODE != PLIB_CAN_OperationModeGet(MY_CAN_ID))
{
PLIB_CAN_PhaseSegment1LengthSet(MY_CAN_ID, CAN_TIME_SEGMENT_LEN_8TQ);
}
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5.6.4.5.3.4 PLIB_CAN_PhaseSegment2LengthFreelyProgrammableDisable Function
C
void PLIB_CAN_PhaseSegment2LengthFreelyProgrammableDisable(
CAN_MODULE_ID index
);
Description
This function disables the CAN phase buffer segment2 length freely programmable mode. The segment2 length will be the
maximum of the segment1 length or information processing time, whichever is greater.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This function works only if the CAN module is in Configuration mode. Use the PLIB_CAN_OperationModeGet function to get the
current mode and the PLIB_CAN_OperationModeSelect function to change the mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsPhaseSegment2LengthFreelyProgrammable in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
if (CAN_CONFIGURATION_MODE != PLIB_CAN_OperationModeGet(MY_CAN_ID))
{
PLIB_CAN_PhaseSegment2LengthFreelyProgrammableDisable(MY_CAN_ID);
}
5.6.4.5.3.5 PLIB_CAN_PhaseSegment2LengthFreelyProgrammableEnable Function
C
void PLIB_CAN_PhaseSegment2LengthFreelyProgrammableEnable(
CAN_MODULE_ID index
);
Description
This function makes the CAN phase buffer segment2 length freely programmable. If this mode is not set, the segment2 length
will be the maximum of the segment1 length or information processing time, whichever is greater.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This function works only if the CAN module is in Configuration mode. Use the PLIB_CAN_OperationModeGet function to get the
current mode and the PLIB_CAN_OperationModeSelect function to change the mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsPhaseSegment2LengthFreelyProgrammable in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
if (CAN_CONFIGURATION_MODE != PLIB_CAN_OperationModeGet(MY_CAN_ID))
{
PLIB_CAN_PhaseSegment2LengthFreelyProgrammableEnable(MY_CAN_ID);
}
5.6.4.5.3.6 PLIB_CAN_PhaseSegment2LengthSet Function
C
void PLIB_CAN_PhaseSegment2LengthSet(
CAN_MODULE_ID index,
CAN_TIME_SEGMENT_LENGTH length
);
Description
This function selects the CAN phase buffer segment2 length.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
length Desired segment length, select from CAN_TIME_SEGMENT_LENGTH enum
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This function works only if the CAN module is in Configuration mode. Use the PLIB_CAN_OperationModeGet function to get the
current mode and the PLIB_CAN_OperationModeSelect function to change the mode.
This function will not work if the freely programmable mode is disabled.
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This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsPhaseSegment2Length in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
if (CAN_CONFIGURATION_MODE != PLIB_CAN_OperationModeGet(MY_CAN_ID))
{
PLIB_CAN_PhaseSegment2LengthFreelyProgrammableEnable(MY_CAN_ID);
PLIB_CAN_PhaseSegment2LengthSet(MY_CAN_ID,
CAN_TIME_SEGMENT_LEN_8TQ);
}
5.6.4.5.3.7 PLIB_CAN_PropagationTimeSegmentSet Function
C
void PLIB_CAN_PropagationTimeSegmentSet(
CAN_MODULE_ID index,
CAN_TIME_SEGMENT_LENGTH length
);
Description
This function selects the propagation time segment.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module.
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This function works only if the CAN module is in configuration mode. Use PLIB_CAN_OperationModeGet function to get the
current mode and PLIB_CAN_OperationModeSelect function to change the mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsPropagationTimeSegment in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
if (CAN_CONFIGURATION_MODE != PLIB_CAN_OperationModeGet(MY_CAN_ID))
{
PLIB_CAN_PropagationTimeSegmentSet(MY_CAN_ID, CAN_TIME_SEGMENT_LEN_8TQ);
}
5.6.4.5.3.8 PLIB_CAN_SyncJumpWidthSet Function
C
void PLIB_CAN_SyncJumpWidthSet(
CAN_MODULE_ID index,
CAN_TIME_SEGMENT_LENGTH length
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);
Description
This function selects the synchronization jump width.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
None.
Remarks
The MY_CAN_ID macro in the example above is used as a placeholder for the actual CAN bus ID (as defined by the
processor-specific CAN_MODULE_ID enum).
This function works only if the CAN module is in Configuration mode. Use the PLIB_CAN_OperationModeGet function to get the
current mode and the PLIB_CAN_OperationModeSelect function to change the mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsSyncJumpWidthSet in your application to determine whether this feature is available.
Example
#define MY_CAN_ID CAN_ID_1
if (CAN_CONFIGURATION_MODE != PLIB_CAN_OperationModeGet(MY_CAN_ID))
{
PLIB_CAN_SyncJumpWidthSet(MY_CAN_ID,
CAN_TIME_SEGMENT_LEN_8TQ);
}
5.6.4.5.4 Channel Configuration
5.6.4.5.4.1 PLIB_CAN_ChannelForReceiveSet Function
C
void PLIB_CAN_ChannelForReceiveSet(
CAN_MODULE_ID index,
CAN_CHANNEL channel,
uint32_t channelSize,
CAN_RX_DATA_MODE dataOnly
);
Description
This function configures a CAN channel for receive operation. A receive channel can be either a full CAN message receive
channel, which receives an entire CAN message (Arbitration field + Data field) or a data-only message channel, which receives
only the data payload section of the message. A receive channel can buffer upto 32 messages. The number of messages to
buffer (i.e., the size of the channel) is set by the channelSize parameter.
Preconditions
The CAN module should be in Configuration mode. This is achieved by using the PLIB_CAN_OperationModeSelect function.
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Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN Receive channel
channelSize Specifies the number of received messages that the channel can buffer before it
overflows. This should be a value between 1 and 32.
5.6.4.5.4.2 PLIB_CAN_ChannelForTransmitSet Function
C
void PLIB_CAN_ChannelForTransmitSet(
CAN_MODULE_ID index,
CAN_CHANNEL channel,
uint8_t channelSize,
CAN_TX_RTR rtren,
CAN_TXCHANNEL_PRIORITY priority
);
Description
This function configures a CAN Channel for transmission. The size of the channel specifies the number of messages that the
channel can buffer. The channel is a First In First Out (FIFO) type of buffer. The remote transmit request feature allows the
transmit channel to start transmitting when an associated filter has received a message. The transmit channel priority determines
the priority as compared to other transmit channels. If two transmit channels have the same priority, the natural channel priority
determines which channel transmits first.
Preconditions
The CAN Module should be in Configuration mode. This is achieved by using the PLIB_CAN_OperationModeSelect function.
Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN Channel
channelSize Size of the channel in messages. This value should be between 1 and 32.
5.6.4.5.4.3 PLIB_CAN_ChannelReset Function
C
void PLIB_CAN_ChannelReset(
CAN_MODULE_ID index,
CAN_CHANNEL channel
);
Description
This function resets a CAN channel. Resetting a CAN channel causes it to discard any unread received messages or any
messages that have not been transmitted yet. The reset operation will wait if a message is being currently transmitted or is being
received. The PLIB_CAN_ChannelResetIsComplete function can be used to check if the channel reset is complete.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
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channel Identifies the CAN channel to be reset
Returns
None.
Remarks
Attempting to read from a channel that is reset will return messages that may have already been read or may not have been
read at all.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsChannelReset in your application to determine whether this feature is available.
Example
// Reset channel 4 of CAN_ID_1 module
// and wait until the reset is complete
PLIB_CAN_ChannelReset(CAN_ID_1,CAN_CHANNEL4);
while(PLIB_CAN_ChannelResetIsComplete(CAN_ID_1,CAN_CHANNEL4) != true);
5.6.4.5.4.4 PLIB_CAN_ChannelUpdate Function
C
void PLIB_CAN_ChannelUpdate(
CAN_MODULE_ID index,
CAN_CHANNEL channel
);
Description
This function updates the CAN Channel internal pointers. This function should be called when a message has been read or
processed completely from a CAN receive channel (using the PLIB_CAN_ReceivedMessageGet function). It should be called
after a new message has been written to a CAN transmit channel (using the PLIB_CAN_TransmitBufferGet function) and before
the PLIB_CAN_TransmitChannelFlush function.
Trying to read a CAN receive channel that has not been updated will cause the PLIB_CAN_ReceivedMessageGet function to
return the same message. Writing to a CAN transmit channel that has not been updated will cause the last written message to
be overwritten.
Preconditions
This function is effective only when the CAN module is not in Configuration mode or Disable mode.
Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the CAN channel to be updated
Returns
None.
Remarks
The PLIB_CAN_ChannelUpdate function should be called on a CAN receive channel only after the message obtained using the
PLIB_CAN_ReceivedMessageGet function has been read or processed completely. The CAN module peripheral library does not
provide access to older messages once the PLIB_CAN_ChannelUpdate function has been called.
When using the PLIB_CAN_TransmitMessageBuffer function to write to a CAN transmit channel the PLIB_CAN_ChannelUpdate
function should be called only when a valid message has been written to the channel. Calling the update function without writing
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to the CAN channel will cause an incorrect message to be output on the CAN channel when the transmit channel is flushed.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsChannelUpdate in your application to determine whether this feature is available.
Example
// CAN_ID_1 Channel 1 is a Receive channel and Channel 2 is a Transmit
// channel. Read and update Channel 1. Write a message to Channel 2 and then
// update and flush the channel.
CAN_TX_MSG_BUFFER * TransmitMessage;
CAN_RX_MSG_BUFFER * rxMessage;
rxMessage = PLIB_CAN_ReceivedMessageGet(CAN_ID_1, CAN_CHANNEL1);
if(rxMessage != NULL)
{
// Process the received message.
PLIB_CAN_ChannelUpdate(CAN_ID_1, CAN_CHANNEL1);
}
TransmitMessage = PLIB_CAN_TransmitBufferGet(CAN_ID_1, CAN_CHANNEL2);
if(TransmitMessage != NULL)
{
// Write a message to buffer
PLIB_CAN_ChannelUpdate(CAN_ID_1, CAN_CHANNEL2);
PLIB_CAN_TransmitChannelFlush(CAN_ID_1, CAN_CHANNEL2);
}
5.6.4.5.4.5 PLIB_CAN_ChannelEventDisable Function
C
void PLIB_CAN_ChannelEventDisable(
CAN_MODULE_ID index,
CAN_CHANNEL channel,
CAN_CHANNEL_EVENT flags
);
Description
This function disables channel level events. Any enabled channel event will cause a CAN module event.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN channel
flags Identifies the CAN channel event(s) to be affected. Several events can be
controlled by logically ORed combination of events.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsChannelEventEnable in your application to determine whether this feature is available.
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Example
PLIB_CAN_ChannelEventDisable(CAN_ID_1, CAN_CHANNEL1, CAN_TX_CHANNEL_EMPTY);
5.6.4.5.5 Event Management
5.6.4.5.5.1 PLIB_CAN_ModuleEventClear Function
C
void PLIB_CAN_ModuleEventClear(
CAN_MODULE_ID index,
CAN_MODULE_EVENT flags
);
Description
This function clears module level events. If the event condition is persistent, clearing the event will have no effect. The event
condition itself should be cleared. The CAN_SYSTEM_ERROR_EVENT can only be cleared by disabling the CAN module using
the PLIB_CAN_Enable function.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
flags Identifies the CAN module level events to be affected. Several events can be
cleared by specifying a logically ORed combination of events.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsModuleEventClear in your application to determine whether this feature is available.
Example
// Clear CAN_ID_1 Transmit Event and Receive Events.
PLIB_CAN_ModuleEventClear(CAN_ID_1, (CAN_TX_EVENT | CAN_RX_EVENT));
5.6.4.5.5.2 PLIB_CAN_ModuleEventDisable Function
C
void PLIB_CAN_ModuleEventDisable(
CAN_MODULE_ID index,
CAN_MODULE_EVENT flags
);
Description
This function disables module level events. Any enabled module event will cause the CAN module to generate a CPU interrupt.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired CAN module
flags Identifies the CAN module level events to be affected. Several events can be
controlled by logically ORed combination of events.
Returns
None.
Remarks
An event can be active regardless of it being enabled or disabled.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsModuleEventEnable in your application to determine whether this feature is available.
Example
// Enable CAN_ID_1 Transmit Event and Receive Events.
// Disable Receive Overflow event and operation
// mode change event.
PLIB_CAN_ModuleEventDisable(CAN_ID_1, (CAN_TX_EVENT | CAN_RX_EVENT));
PLIB_CAN_ModuleEventDisable(CAN_ID_1, (CAN_OPERATION_MODE_CHANGE_EVENT |
CAN_RX_OVERFLOW_EVENT));
5.6.4.5.5.3 PLIB_CAN_ModuleEventEnable Function
C
void PLIB_CAN_ModuleEventEnable(
CAN_MODULE_ID index,
CAN_MODULE_EVENT flags
);
Description
This function enables module level events. Any enabled module event will cause the CAN module to generate a CPU interrupt.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
flags Identifies the CAN module level events to be affected. Several events can be
controlled by logically ORed combination of events.
Returns
None.
Remarks
An event can be active regardless of it being enabled or disabled.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsModuleEventEnable in your application to determine whether this feature is available.
Example
// Enable CAN_ID_1 Transmit Event and Receive Events.
// Disable Receive Overflow event and operation
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// mode change event.
PLIB_CAN_ModuleEventEnable(CAN_ID_1, (CAN_TX_EVENT | CAN_RX_EVENT));
PLIB_CAN_ModuleEventEnable(CAN_ID_1, (CAN_OPERATION_MODE_CHANGE_EVENT |
CAN_RX_OVERFLOW_EVENT));
5.6.4.5.5.4 PLIB_CAN_ModuleEventGet Function
C
CAN_MODULE_EVENT PLIB_CAN_ModuleEventGet(
CAN_MODULE_ID index
);
Description
This function returns the status of the CAN module events. The routine returns a status word. This word should be logically
ANDed with the desired CAN_MODULE_EVENT event mask. A non-zero result of such an operation would mean that the
events specified in the event mask are active. An event mask can contain one event or can be a logical OR combination of
multiple events.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
A status word representing the status of the CAN module events.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsModuleEventClear in your application to determine whether this feature is available.
Example
// Check if the CAN_ID_1 Module Receive event
// or if Transmit event is active
if((PLIB_CAN_ModuleEventGet(CAN_ID_1) & (CAN_RX_EVENT | CAN_TX_EVENT)) != 0)
{
// Handle the Receive or Transmit module Event here.
}
// Check if the CAN_ID_2 System Error Event
// is active
if((PLIB_CAN_ModuleEventGet(CAN_ID_2) & CAN_SYSTEM_ERROR_EVENT) != 0)
{
// CAN_ID_2 System error event is active.
}
5.6.4.5.5.5 PLIB_CAN_AllChannelEventsGet Function
C
CAN_CHANNEL_MASK PLIB_CAN_AllChannelEventsGet(
CAN_MODULE_ID index
);
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Description
This function returns a value representing the event status of all of the CAN channels. The return value can be logically ANDed
with a CAN_CHANNEL_MASK type to check whether the channel has any active events. Only an enabled channel event will
cause the bit to be updated.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
Returns a value that can be logically ANDed with a CAN_CHANNEL_MASK mask value to check if any event on a channel is
active.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsAllChannelEvents in your application to determine whether this feature is available.
Example
// Check if Channel 2 or 3 of CAN_ID_1 module
// have any active events
CAN_CHANNEL_MASK channelEvents;
channelEvents = PLIB_CAN_AllChannelEventsGet(CAN_ID_1);
if((channelEvents & (CAN_CHANNEL2_MASK | CAN_CHANNEL3_MASK)) != 0)
{
// Either Channel 2 or 3 has an active event.
// The PLIB_CAN_ChannelEventGet function can be
// used to query the channel for more details.
}
// Check if Channel 31 of CAN_ID_2 module
// has an any active events
channelEvents = PLIB_CAN_AllChannelEventsGet(CAN_ID_2);
if((channelEvents & CAN_CHANNEL31_MASK) != 0)
{
// Channel 31 of CAN_ID_2 module
// has an active event.
}
5.6.4.5.5.6 PLIB_CAN_AllChannelOverflowStatusGet Function
C
CAN_CHANNEL_MASK PLIB_CAN_AllChannelOverflowStatusGet(
CAN_MODULE_ID index
);
Description
This function returns a value representing the Receive overflow event status of all the CAN Channels. The return value can be
logically ANDed with a CAN_CHANNEL_MASK type to check whether a channel has any active receive overflow events. The
return value will reflect the channel status only if the receive overflow event of the channel is enabled.
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
Returns a value that can be logically ANDed with a CAN_CHANNEL_MASK mask value to check if a receive channel overflow
event is active.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsAllChannelOverflow in your application to determine whether this feature is available.
Example
// Check if Receive Channel 2 or 3 of CAN_ID_1 module
// have overflowed
CAN_CHANNEL_MASK channelOverflowEvent;
channelOverflowEvent = PLIB_CAN_AllChannelOverflowStatusGet(CAN_ID_1);
if((channelOverflowEvent & (CAN_CHANNEL2_MASK | CAN_CHANNEL3_MASK)) != 0)
{
// Either Receive Channel 2 or 3 has overflowed.
// The PLIB_CAN_ChannelEventGet function can be
// used to query the channel for more details.
}
// Check if Receive Channel 31 of CAN_ID_2 module
// has overflowed
channelOverflowEvent = PLIB_CAN_AllChannelOverflowStatusGet(CAN_ID_2);
if((channelOverflowEvent & CAN_CHANNEL31_MASK) != 0)
{
// Channel 31 of CAN_ID_2 module
// has overflowed.
}
5.6.4.5.5.7 PLIB_CAN_ChannelEventClear Function
C
void PLIB_CAN_ChannelEventClear(
CAN_MODULE_ID index,
CAN_CHANNEL channel,
CAN_CHANNEL_EVENT events
);
Description
This function clears channel events. The events to be cleared are specified as mask. Note that only the receive overflow event is
clearable. Attempting to clear other events will have no effect since these events are persistent and clear only when the event
condition is cleared.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN Channel
events Mask specifying the events to be cleared
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsChannelEvent in your application to determine whether this feature is available.
Example
// Clear CAN_ID_2 Receive Channel 3 overflow event
PLIB_CAN_ChannelEventClear(CAN_ID_2, CAN_CHANNEL3, CAN_RX_CHANNEL_OVERFLOW);
5.6.4.5.5.8 PLIB_CAN_ChannelEventEnable Function
C
void PLIB_CAN_ChannelEventEnable(
CAN_MODULE_ID index,
CAN_CHANNEL channel,
CAN_CHANNEL_EVENT flags
);
Description
This function enables channel level events. Any enabled channel event will cause a CAN module event. An event can be active
regardless of it being enabled or disabled. Enabling a transmit type of event for a receive channel will have no any effect.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN Channel
flags Identifies the CAN channel event(s) to be affected. Several events can be
controlled by logically ORed combination of events.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsChannelEventEnable in your application to determine whether this feature is available.
Example
// CAN_ID_1 Channel 1 and 3 are Transmit channels and Channel 2 and 4 are
// Receive channels. Enable Channel 1 empty event and channel not full
// event. Disable Channel 2 full and overflow event.
// Enable all Transmit events on Channel 2 and disable all Receive events on
// on Channel 4.
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PLIB_CAN_ChannelEventEnable(CAN_ID_1, CAN_CHANNEL1, (CAN_TX_CHANNEL_EMPTY |
CAN_TX_CHANNEL_NOT_FULL));
PLIB_CAN_ChannelEventEnable(CAN_ID_1, CAN_CHANNEL2, (CAN_RX_CHANNEL_FULL |
CAN_RX_CHANNEL_OVERFLOW));
PLIB_CAN_ChannelEventEnable(CAN_ID_1, CAN_CHANNEL3, CAN_TX_CHANNEL_ANY_EVENT);
PLIB_CAN_ChannelEventEnable(CAN_ID_1, CAN_CHANNEL4, CAN_RX_CHANNEL_ANY_EVENT);
5.6.4.5.5.9 PLIB_CAN_ChannelEventGet Function
C
CAN_CHANNEL_EVENT PLIB_CAN_ChannelEventGet(
CAN_MODULE_ID index,
CAN_CHANNEL channel
);
Description
This function returns a value representing the event status of a CAN channel. The return value can be logically ANDed with
CAN_CHANNEL_EVENT type to check for a specific event(s). Channels events are affected regardless of whether the event
itself is enabled or disabled.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN Channel
Returns
Returns a value that can be logically ANDed with a CAN_CHANNEL_EVENT type to check if specific CAN channel events are
active.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsChannelEvent in your application to determine whether this feature is available.
Example
// Check if Receive Channel 2 of CAN_ID_1 module
// is not empty or if its full.
CAN_CHANNEL_EVENT channelEvent;
channelEvent = PLIB_CAN_ChannelEventGet(CAN_ID_1,CAN_CHANNEL2);
if((channelEvent & (CAN_RX_CHANNEL_NOT_EMPTY | CAN_RX_CHANNEL_FULL)) != 0)
{
// This means that either Receive Channel 2 is not empty
// or the Channel is full.
}
// Check if Transmit Channel 3 of CAN_ID_2 module
// has any active events
channelEvent = PLIB_CAN_ChannelEventGet(CAN_ID_2, CAN_CHANNEL3);
if((channelEvent & CAN_TX_CHANNEL_ANY_EVENT) != 0)
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{
// This means that some event is active
}
// Check if Transmit Channel 6 of CAN_ID_2 module is not full
channelEvent = PLIB_CAN_ChannelEventGet(CAN_ID_2, CAN_CHANNEL6);
if((channelEvent & CAN_TX_CHANNEL_NOT_FULL) != 0)
{
// This means the Channel is not full.
}
5.6.4.5.5.10 PLIB_CAN_PendingEventsGet Function
C
CAN_EVENT_CODE PLIB_CAN_PendingEventsGet(
CAN_MODULE_ID index
);
Description
This function returns a value representing the highest priority active event in the module. The return value is a
CAN_EVENT_CODE type.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
Returns a CAN_EVENT_CODE type representing the highest priority active event in the module.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsPendingEventsGet in your application to determine whether this feature is available.
Example
// Implement a switch to check and process
// any active CAN module events.
CAN_EVENT_CODE eventCode;
eventCode = PLIB_CAN_PendingEventsGet(CAN_ID_1);
switch(eventCode)
{
case CAN_NO_EVENT:
// Procedure to handle no CAN events
break;
case CAN_WAKEUP_EVENT:
// Procedure to handle device wake-up
// on CAN bus activity event
break;
default:
break;
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}
5.6.4.5.6 Message Transmit Functions
5.6.4.5.6.1 PLIB_CAN_PendingTransmissionsAbort Function
C
void PLIB_CAN_PendingTransmissionsAbort(
CAN_MODULE_ID index,
CAN_CHANNEL channel
);
Description
This function aborts any pending transmit operations. Any messages that are yet to be transmitted will not be transmitted. The
messages will still be present in the respective channel. Any message that is in the process of being transmitted will be
transmitted completely. Either one channel or all channels can be specified.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN channel. By specifying CAN_ALL_CHANNELS,
transmission on all transmit channels will be aborted.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsPendingTransmissionsAbort in your application to determine whether this feature is available.
Example
// Abort any pending transmissions on CAN_ID_1 Channel 4 and
// Channel 5.
PLIB_CAN_PendingTransmissionsAbort(CAN_ID_1, CAN_CHANNEL4);
PLIB_CAN_PendingTransmissionsAbort(CAN_ID_1, CAN_CHANNEL5);
5.6.4.5.6.2 PLIB_CAN_TransmissionIsAborted Function
C
bool PLIB_CAN_TransmissionIsAborted(
CAN_MODULE_ID index,
CAN_CHANNEL channel
);
Description
This function returns 'true' if the transmit abort operation is complete. Either individual channels can be specified or all channels
can be specified.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN channel. By specifying CAN_ALL_CHANNELS the
status of transmit abort on all transmit channels will be returned.
Returns
• true = If channel = CAN_ALL_CHANNELS, Transmit Abort is complete = If channel = CAN_CHANNELx, Transmit Abort was
successful
• false = If channel = CAN_ALL_CHANNELS, Transmit Abort is in progress = If channel = CAN_CHANNELx, Transmit Abort
was not successful
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsTransmissionIsAborted in your application to determine whether this feature is available.
Example
// Abort any pending transmissions on CAN_ID_1 Channel 4 and
// check if the current message transmission was aborted.
PLIB_CAN_PendingTransmissionsAbort(CAN_ID_1, CAN_CHANNEL4);
if(PLIB_CAN_TransmissionIsAborted(CAN_ID_1, CAN_CHANNEL4) == false)
{
// The message was not aborted.
}
else
{
// The message was aborted.
}
5.6.4.5.6.3 PLIB_CAN_TransmitBufferGet Function
C
CAN_TX_MSG_BUFFER * PLIB_CAN_TransmitBufferGet(
CAN_MODULE_ID index,
CAN_CHANNEL channel
);
Description
This function returns a pointer to an empty transmit buffer. The routine will return a NULL pointer if there aren't any empty
transmit buffers. In such a case, the application should flush the channel and wait until the transmit channel has at least one
empty buffer. In order to function correctly, it is essential that the PLIB_CAN_ChannelUpdate function is called in the proper
sequence for the PLIB_CAN_TransmitBufferGet function to return a pointer to an empty buffer.
Preconditions
PLIB_CAN_MemoryBufferAssign must be called if the 'transmit buffer' should be in the device RAM. It is not required if the
'transmit buffer' is in SFR space.
Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN Channel
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Returns
Returns a CAN_TX_MSG_BUFFER type pointer to an empty message buffer in the Transmit channel. Returns NULL if the
channel is full and there aren't any empty message buffers.
Remarks
Calling the PLIB_CAN_TransmitBufferGet function on a channel that has not been updated after a message was written to the
channel, will cause the function to return a pointer to the written message in case of transmit buffer FIFO. Therefore, a
non-transmitted message could get overwritten.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsTransmitBufferGet in your application to determine whether this feature is available.
Example
// Transmit a message through CAN_ID_1 Channel 4
CAN_TX_MSG_BUFFER * msgBuffer;
msgBuffer = PLIB_CAN_TransmitBufferGet(CAN_ID_1, CAN_CHANNEL4);
if(msgBuffer != NULL)
{
// Load the message here
}
else
{
// No space in the channel
// wait until a message
// buffer is free.
while((PLIB_CAN_ChannelEventGet(CAN_ID_1, CAN_CHANNEL4) &
CAN_TX_CHANNEL_NOT_FULL) == 0);
}
5.6.4.5.6.4 PLIB_CAN_TransmitChannelFlush Function
C
void PLIB_CAN_TransmitChannelFlush(
CAN_MODULE_ID index,
CAN_CHANNEL channel
);
Description
This function causes all messages in the specified transmit channel to be transmitted. All messages in the channel at the time of
the flush operation will be transmitted. The transmit channel flush operation should preferably be called immediately after the
PLIB_CAN_ChannelUpdate function. This will ensure that messages are transmitted promptly.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN channel
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsTransmitChannelFlush in your application to determine whether this feature is available.
Example
// Flush CAN_ID_1 Transmit Channel 4.
PLIB_CAN_TransmitChannelFlush(CAN_ID_1, CAN_CHANNEL4);
5.6.4.5.6.5 PLIB_CAN_TransmitChannelStatusGet Function
C
CAN_TX_CHANNEL_STATUS PLIB_CAN_TransmitChannelStatusGet(
CAN_MODULE_ID index,
CAN_CHANNEL channel
);
Description
This function returns the condition of the transmit channel. The return value can be logically ANDed with
CAN_TX_CHANNEL_STATUS type values.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
channel Identifies the desired CAN channel
Returns
Returns a status word that can be logically ANDed with the CAN_TX_CHANNEL_STATUS type to check whether a condition
exists.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsTransmitChannelStatus in your application to determine whether this feature is available.
Example
// Check if CAN_ID_1 Transmit Channel 4
// is still transmitting
CAN_TX_CHANNEL_STATUS status;
status = PLIB_CAN_TransmitChannelStatusGet(CAN_ID_1, CAN_CHANNEL4);
if((status & CAN_TX_CHANNEL_TRANSMITTING) != 0)
{
// This means that channel is still
// transmitting.
}
// Check if CAN_ID_2 Transmit Channel 5 has lost arbitration
// or other Transmit errors.
status = PLIB_CAN_TransmitChannelStatusGet(CAN_ID_2, CAN_CHANNEL5);
if((status & (CAN_TX_CHANNEL_ARBITRATION_LOST | CAN_TX_CHANNEL_ERROR)) != 0)
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{
// This means that the Transmit channel has either
// lost arbitration or a Transmit error has occurred.
}
5.6.4.5.6.6 PLIB_CAN_TransmitErrorCountGet Function
C
int PLIB_CAN_TransmitErrorCountGet(
CAN_MODULE_ID index
);
Description
This function returns the CAN transmit error count. Refer to CAN 2.0B specification for more details on the CAN transmit error
count and its significance.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
Returns the CAN transmit error count.
Remarks
There are multiple bus conditions, which could cause the transmit error count to increase. Please refer to the CAN 2.0B
specification for details.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsTransmitErrorCountGet in your application to determine whether this feature is available.
Example
// Check if the CAN_ID_1 Transmit error count is more than 200
int errorCount;
errorCount = PLIB_CAN_TransmitErrorCountGet(CAN_ID_1);
if(errorCount > 200)
{
// This error count is high.
// Do some diagnostics.
}
5.6.4.5.7 Message Receive Functions
5.6.4.5.7.1 PLIB_CAN_ReceivedMessageGet Function
C
CAN_RX_MSG_BUFFER * PLIB_CAN_ReceivedMessageGet(
CAN_MODULE_ID index,
CAN_CHANNEL channel
);
Description
This function returns a CAN_RX_MSG_BUFFER pointer to a message to be read from the CAN channel. The routine will return
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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NULL if there are no new messages to be read. The PLIB_CAN_ChannelUpdate routine should be called after the received
message has been processed.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module.
channel Identifies the desired CAN Receive channel.
Returns
Returns NULL if there are no messages in the channel; otherwise returns a CAN_RX_MSG_BUFFER type pointer to a received
CAN message. If the receive channel is a full CAN message receive channel, the caller should use the msgSID, msgEID and
data members of the CAN_RX_MSG_BUFFER data structure to access the received CAN message. If the receive channel is a
data-only channel, the message will only contain 8 payload data bytes (even if the message was placed on the bus with less
than 8 bytes). The caller in this case should use the dataOnlyMsgData member of the CAN_RX_MSG_BUFFER data structure
to read the data contained in the received CAN message.
Remarks
The CAN receive channel is configured as a full CAN message receive channel or a data-Only channel while configuring the
channel using the PLIB_CAN_ChannelForReceiveSet function.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsReceivedMessageGet in your application to determine whether this feature is available.
Example
// Read a message from the CAN_ID_1 Channel 8
// which is configured as full CAN message
// receive channel.
CAN_RX_MSG_BUFFER * receivedMsg;
receivedMsg = (CAN_RX_MSG_BUFFER *)PLIB_CAN_ReceivedMessageGet(CAN_ID_1,
CAN_CHANNEL8);
if(receivedMsg != NULL)
{
// rxMsg is pointing to
// a CAN message. Process
// the message and then update
// the CAN channel.
PLIB_CAN_ChannelUpdate(CAN_ID_1, CAN_CHANNEL8);
}
// Read a message from the CAN_ID_2 Channel 9
// which is configured as data only message
// receive channel. Access the message
// as bytes;
CAN_RX_MSG_BUFFER * rxMsg;
rxMsg = PLIB_CAN_ReceivedMessageGet(CAN_ID_2, CAN_CHANNEL9);
if(rxMsg != NULL)
{
// rxMsg is pointing to
// a CAN message. Process
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// the message and then update
// the CAN channel.
// rxMsg->dataOnlyMsgData[0] is the first byte of message
// data payload. rxMsg->dataOnlyMsgData[0] is the second
// byte of message data payload and so on.
PLIB_CAN_ChannelUpdate(CAN_ID_2, CAN_CHANNEL9);
}
5.6.4.5.7.2 PLIB_CAN_RxFIFOFourLeftNotify Function
C
void PLIB_CAN_RxFIFOFourLeftNotify(
CAN_MODULE_ID index
);
Description
This function configures the module to generate an interrupt when the FIFO has four receive buffers left. If this API is not called,
the module will interrupt if four receive buffers are empty.
Preconditions
The functional mode of the module should be configured for "CAN_ENHANCED_FIFO_MODE2" using
PLIB_CAN_FunctionalModeSelect function.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
The total number of CAN Masks per CAN module.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsRxFIFOFourLeftNotify in your application to determine whether this feature is available.
Example
PLIB_CAN_RxFIFOFourLeftNotify(CAN_ID_1);
5.6.4.5.7.3 PLIB_CAN_RxFIFOOneLeftNotify Function
C
void PLIB_CAN_RxFIFOOneLeftNotify(
CAN_MODULE_ID index
);
Description
This function configures the module to generate an interrupt when the FIFO has only one receive buffer left. If this API is not
called, the module will interrupt if four receive buffers are empty.
Preconditions
The functional mode of the module should be configured for "CAN_ENHANCED_FIFO_MODE2" using
PLIB_CAN_FunctionalModeSelect function.
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Parameters
Parameters Description
index Identifies the desired CAN module
Returns
The total number of CAN Masks per CAN module.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsRxFIFOOneLeftNotify in your application to determine whether this feature is available.
Example
PLIB_CAN_RxFIFOOneLeftNotify(CAN_ID_1);
5.6.4.5.7.4 PLIB_CAN_ReceiveModeSelect Function
C
void PLIB_CAN_ReceiveModeSelect(
CAN_MODULE_ID index,
CAN_RECEIVE_CHANNEL rcvChannel,
CAN_RECEIVE_MODES recMode
);
Description
This function selects the receive mode of the CAN module.
Preconditions
The functional mode should support the 'receive mode' selected.
Parameters
Parameters Description
index Identifies the desired CAN module
rcvChannel Receive channel number, one of the possible values from
CAN_RECEIVE_CHANNEL
recMode Receive mode, one of the possible values from CAN_RECEIVE_MODES
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsReceiveModeSelect in your application to determine whether this feature is available.
Example
PLIB_CAN_FunctionalModeSelect(CAN_ID_1, CAN_LEGACY_MODE0);
PLIB_CAN_ReceiveModeSelect(CAN_ID_1, CAN_RECEIVE_CHANNEL0, CAN_RECEIVE_ALL_MSG_MODE);
5.6.4.5.7.5 PLIB_CAN_ReceiveModeGet Function
C
CAN_RECEIVE_MODES PLIB_CAN_ReceiveModeGet(
CAN_MODULE_ID index,
CAN_RECEIVE_CHANNEL rcvChannel
);
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Description
This function obtains the receive mode of the CAN module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
rcvChannel Receive channel number, one of the possible values from
CAN_RECEIVE_CHANNEL
Returns
Receive mode, one of the possible values from CAN_RECEIVE_MODES. .
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsReceiveModeSelect in your application to determine whether this feature is available.
Example
CAN_RECEIVE_MODES recMode;
recMode = PLIB_CAN_ReceiveModeGet(CAN_ID_1, CAN_RECEIVE_CHANNEL0);
5.6.4.5.7.6 PLIB_CAN_MessageIsReceived Function
C
bool PLIB_CAN_MessageIsReceived(
CAN_MODULE_ID index,
CAN_RECEIVE_CHANNEL rcvChannel
);
Description
This function returns 'true' if a message was received and the receive buffer is not empty.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
rcvChannel Receive channel number, one of the possible values from
CAN_RECEIVE_CHANNEL
Returns
• true = A message was received for the specified channel
• false = The receive buffer is not empty for the specified channel
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsMessageIsReceived in your application to determine whether this feature is available.
Example
if (PLIB_CAN_MessageIsReceived(CAN_ID_1, CAN_RECEIVE_CHANNEL0))
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{
//Read the message
//Acknowlege read; otherwise, it will cause the interrupt to
//generated again
PLIB_CAN_ReceiveBufferClear(CAN_ID_1, CAN_RECEIVE_CHANNEL0);
}
5.6.4.5.7.7 PLIB_CAN_ReceiveBufferIsEmpty Function
C
bool PLIB_CAN_ReceiveBufferIsEmpty(
CAN_MODULE_ID index,
CAN_RECEIVE_CHANNEL rcvChannel
);
Description
This function returns 'true' if the receive buffer of the specified channel is empty.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
rcvChannel Receive channel number, one of the possible values from
CAN_RECEIVE_CHANNEL
Returns
• true = The receive buffer is not empty for the specified channel
• false = A message was received for the specified channel
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsReceiveBufferIsEmpty in your application to determine whether this feature is available.
Example
if (PLIB_CAN_ReceiveBufferIsEmpty(CAN_ID_1, CAN_RECEIVE_CHANNEL0))
{
//Buffer is empty
}
5.6.4.5.7.8 PLIB_CAN_ReceiveBufferClear Function
C
void PLIB_CAN_ReceiveBufferClear(
CAN_MODULE_ID index,
CAN_RECEIVE_CHANNEL rcvChannel
);
Description
This function clears the received message flag.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired CAN module
rcvChannel Receive channel number, one of the possible values from
CAN_RECEIVE_CHANNEL
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsReceiveBufferClear in your application to determine whether this feature is available.
This API should be called once the receive message buffer is read. This function must be called once the receive message
buffer has been read or the interrupt request will still be active and the interrupt may occur again immediately.
Example
if (PLIB_CAN_MessageIsReceived(CAN_ID_1, CAN_RECEIVE_CHANNEL0))
{
//Read the message
//Acknowledge read, otherwise it will cause the interrupt to
//be generated again
PLIB_CAN_ReceiveBufferClear(CAN_ID_1, CAN_RECEIVE_CHANNEL0);
}
5.6.4.5.7.9 PLIB_CAN_RemoteTransmitReqIsReceived Function
C
bool PLIB_CAN_RemoteTransmitReqIsReceived(
CAN_MODULE_ID index,
CAN_RECEIVE_CHANNEL rcvChannel
);
Description
This function returns 'true' if the message received is a remote transmit request.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
rcvChannel Receive channel number, one of the possible values from
CAN_RECEIVE_CHANNEL
Returns
• true = Received message is a remote transmission request
• false = Received message is not a remote transmission request
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsRemoteTransmitReq in your application to determine whether this feature is available.
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Example
if (PLIB_CAN_RemoteTransmitReqIsReceived(CAN_ID_1, CAN_RECEIVE_CHANNEL0))
{
//Request for remote transmit
}
5.6.4.5.8 Message Filtering Functions
5.6.4.5.8.1 PLIB_CAN_FilterConfigure Function
C
void PLIB_CAN_FilterConfigure(
CAN_MODULE_ID index,
CAN_FILTER filter,
uint32_t id,
CAN_ID_TYPE filterType
);
Description
This function configures a CAN message acceptance filter. The ID field of the incoming message must match the filter bits for the
CAN module to accept the message. A filter can be a EID type filter, which filters EID messages or a SID filter, which in turn
filters SID messages. The filter mask bits (configured using the PLIB_CAN_FilterMaskConfigure function) additionally allow
specified message ID bits to be ignored in the filtering process.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
filter Identifies the desired CAN receive filter
id A value in the range 0x0 to 0x7FF for SID filter type or 0x0 to 0x1FFFFFFF for EID
filter type.
5.6.4.5.8.2 PLIB_CAN_FilterDisable Function
C
void PLIB_CAN_FilterDisable(
CAN_MODULE_ID index,
CAN_FILTER filter
);
Description
This function disables a CAN message acceptance filter. At least one filter must be enabled for the CAN module to receive
messages. A receive channel associated with a filter will not receive messages unless the filter is enabled. After a filter is
disabled, the PLIB_CAN_FilterIsDisabled function should be called to verify that the filter is disabled. A filter must be disabled
before it can be configured.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired CAN module
filter Identifies the desired CAN Message Acceptance Filter
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsFilterEnable in your application to determine whether this feature is available.
Example
// Enable filter 6 of CAN_ID_2
PLIB_CAN_FilterDisable (CAN_ID_2, CAN_FILTER6);
while(PLIB_CAN_FilterIsDisabled(CAN_ID_1, CAN_FILTER4));
5.6.4.5.8.3 PLIB_CAN_FilterEnable Function
C
void PLIB_CAN_FilterEnable(
CAN_MODULE_ID index,
CAN_FILTER filter
);
Description
This function enables a CAN message acceptance filter. At least one filter must be enabled for the CAN module to receive
messages. A receive channel associated with a filter will not receive messages unless the filter is enabled. After a filter is
disabled, the PLIB_CAN_FilterIsDisabled function should be called to verify that the filter is disabled. A filter must be disabled
before it can be configured.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
filter Identifies the desired CAN message acceptance filter
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsFilterEnable in your application to determine whether this feature is available.
Example
// Enable filter 6 of CAN_ID_2
PLIB_CAN_FilterEnable (CAN_ID_2, CAN_FILTER6);
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while(!PLIB_CAN_FilterIsDisabled(CAN_ID_1, CAN_FILTER4));
5.6.4.5.8.4 PLIB_CAN_FilterIsDisabled Function
C
bool PLIB_CAN_FilterIsDisabled(
CAN_MODULE_ID index,
CAN_FILTER filter
);
Description
Returns 'true' if the specified filter is disabled. This function should be called to check if the filter is disabled before calling the
PLIB_CAN_FilterConfigure function and PLIB_CAN_FilterToChannelLink function.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
filter Identifies the desired CAN filter
Returns
• true = The filter is disabled
• false = The filter is enabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsFilterEnable in your application to determine whether this feature is available.
Example
// Disable CAN_ID_1 filter 3 and wait until the
// filter is disabled.
PLIB_CAN_FilterEnable(CAN_ID_1, CAN_FILTER3);
while(PLIB_CAN_FilterIsDisabled(CAN_ID_1, CAN_FILTER3) == false);
5.6.4.5.8.5 PLIB_CAN_FilterMaskConfigure Function
C
void PLIB_CAN_FilterMaskConfigure(
CAN_MODULE_ID index,
CAN_FILTER_MASK mask,
uint32_t maskbits,
CAN_ID_TYPE idType,
CAN_FILTER_MASK_TYPE mide
);
Description
This function configures a CAN filter mask. The mask bits determine which message ID bits are ignored and compared during
the filtering process.
Preconditions
The CAN module should be in Configuration mode. This is achieved by using the PLIB_CAN_OperationModeSelect function.
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Parameters
Parameters Description
index Identifies the desired CAN module
mask Identifies the desired CAN receive filter mask.
maskbits A value in the range 0x0 to 0x7FF for SID range or 0x0 to 0x1FFFFFFF for the
EID range. Each set bit will mean that the corresponding bit in the filter will be
compared to the corresponding bit in the message ID. A clear mask bit means the
corresponding bit in the incoming message ID field will be ignored.
5.6.4.5.8.6 PLIB_CAN_FilterToChannelLink Function
C
void PLIB_CAN_FilterToChannelLink(
CAN_MODULE_ID index,
CAN_FILTER filter,
CAN_FILTER_MASK mask,
CAN_CHANNEL channel
);
Description
This function links a filter to a channel. A filter is typically linked to a receive channel. This allows the channel to receive
messages accepted by the filter. A filter can also be linked to a transmit channel if the transmit channel is configured for remote
request transmit. In this case, a message accepted by the filter will automatically cause the linked transmit channel to transmit
CAN messages that are buffered in the channel. Note that a filter should be enabled using the PLIB_CAN_FilterEnable function
after the filter has been linked to the desired channel.
Preconditions
Filter should have been disabled using the PLIB_CAN_FilterDisable function.
Parameters
Parameters Description
index Identifies the desired CAN module
filter Identifies the desired CAN Filter
mask Identifies the mask to be used with this filter
channel Identifies the channel to be linked to this filter. If a transmit channel is linked, the
transmit channel should have it's remote transmit request feature enabled.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsFilterToChannelLink in your application to determine whether this feature is available.
Example
// Configure CAN_ID_1 filter 3 to accept extended ID messages
// with EID 0x1D400 and link the filter to CAN_ID_1 Channel 5.
// Note the sequence in which the steps are performed.
// Disable the filter and check if its disabled.
// Configure the filter. Link it to the Channel and then
// enable the filter.
PLIB_CAN_FilterDisable(CAN_ID_1, CAN_FILTER3);
while(PLIB_CAN_FilterIsDisabled(CAN_ID_1, CAN_FILTER3) == false);
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PLIB_CAN_FilterConfigure(CAN_ID_1, CAN_FILTER3, 0x1D400, CAN_EID);
PLIB_CAN_FilterToChannelLink(CAN_ID_1, CAN_FILTER3, CAN_FILTER_MASK0,
CAN_CHANNEL5);
PLIB_CAN_FilterEnable(CAN_ID_1, CAN_FILTER3);
5.6.4.5.8.7 PLIB_CAN_LatestFilterMatchGet Function
C
CAN_FILTER PLIB_CAN_LatestFilterMatchGet(
CAN_MODULE_ID index
);
Description
This function returns the index of the filter that accepted the latest message.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
Index of the filter that accepted the latest message
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsLatestFilterMatchGet in your application to determine whether this feature is available.
Example
// Check if CAN_ID_2 module Receive Buffer event
// is active and if so check which filter
// accepted the message.
CAN_FILTER filter;
if((PLIB_CAN_ModuleEventGet(CAN_ID_1) & CAN_RX_EVENT) != 0)
{
// Check which filter accepted the message
filter = PLIB_CAN_LatestFilterMatchGet(CAN_ID_1);
}
5.6.4.5.9 Error State Tracking
5.6.4.5.9.1 PLIB_CAN_ReceiveErrorCountGet Function
C
int PLIB_CAN_ReceiveErrorCountGet(
CAN_MODULE_ID index
);
Description
This function returns the CAN receive error count. Refer to the CAN 2.0B specification for more details on the CAN receive error
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count and its significance.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
Returns the CAN receive error count.
Remarks
There are multiple bus conditions, which could cause the receive error count to increase. Please refer to the CAN 2.0b
specification for details.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsReceiveErrorCount in your application to determine whether this feature is available.
Example
// Check if CAN_ID_1 Receive error count is more than 200.
int errCount;
errCount = PLIB_CAN_ReceiveErrorCountGet(CAN_ID_1);
if(errCount > 200)
{
// This error count is high.
// Do some diagnostics.
}
5.6.4.5.9.2 PLIB_CAN_ErrorStateGet Function
C
CAN_ERROR_STATE PLIB_CAN_ErrorStateGet(
CAN_MODULE_ID index
);
Description
This function returns the CAN error status word. The return word can be logically ANDed with the desired CAN_ERROR_STATE
member to check if the CAN module is in a specific error state.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
Returns the CAN_ERROR_STATE word, which can be logically ANDed with the desired CAN_ERROR_STATE member to
check whether the CAN module is in a specific error state.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsErrorState in your application to determine whether this feature is available.
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Example
// Check if CAN_ID_1 is in the Transmit or Receive warning state.
CAN_ERROR_STATE errorState;
errorState = PLIB_CAN_ErrorStateGet(CAN_ID_1);
if((errorState & CAN_TX_RX_WARNING_STATE) != 0)
{
// CAN_ID_1 is in either Transmit or Receive warning state.
}
// Check if CAN_ID_2 is in the Receive Bus Passive or Transmit Bus passive
// state.
errorState = PLIB_CAN_ErrorStateGet(CAN_ID_2);
if((errorState & (CAN_TX_BUS_PASSIVE_STATE | CAN_RX_BUS_PASSIVE_STATE)) != 0)
{
// This means that the CAN module is in Transmit Bus Passive
// or Receive Bus Passive state.
}
5.6.4.5.10 Information Functions
5.6.4.5.10.1 PLIB_CAN_TotalChannelsGet Function
C
char PLIB_CAN_TotalChannelsGet(
CAN_MODULE_ID index
);
Description
This function returns the total number of CAN channels per CAN module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
The total number of CAN channels per CAN module.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsModuleInfo in your application to determine whether this feature is available.
Example
char totalChannels;
totalChannels = PLIB_CAN_TotalChannelsGet(CAN_ID_1);
5.6.4.5.10.2 PLIB_CAN_TotalFiltersGet Function
C
char PLIB_CAN_TotalFiltersGet(
CAN_MODULE_ID index
);
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Description
This function returns the total number of CAN filters per CAN module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
The total number of CAN Filters per CAN module.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsModuleInfo in your application to determine whether this feature is available.
Example
char totalFilters;
totalFilters = PLIB_CAN_TotalFiltersGet(CAN_ID_1);
5.6.4.5.10.3 PLIB_CAN_TotalMasksGet Function
C
char PLIB_CAN_TotalMasksGet(
CAN_MODULE_ID index
);
Description
This function returns the total number of CAN masks per CAN module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired CAN module
Returns
The total number of CAN Masks per CAN module.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CAN_ExistsModuleInfo in your application to determine whether this feature is available.
Example
char totalMasks;
totalMasks = PLIB_CAN_TotalMasksGet(CAN_ID_1);
5.6.4.5.11 Data Types and Constants
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5.6.4.5.11.1 CAN_CHANNEL Enumeration
C
typedef enum {
CAN_CHANNEL0,
CAN_CHANNEL1,
CAN_CHANNEL2,
CAN_CHANNEL3,
CAN_CHANNEL4,
CAN_CHANNEL5,
CAN_CHANNEL6,
CAN_CHANNEL7,
CAN_CHANNEL8,
CAN_CHANNEL9,
CAN_CHANNEL10,
CAN_CHANNEL11,
CAN_CHANNEL12,
CAN_CHANNEL13,
CAN_CHANNEL14,
CAN_CHANNEL15,
CAN_CHANNEL16,
CAN_CHANNEL17,
CAN_CHANNEL18,
CAN_CHANNEL19,
CAN_CHANNEL20,
CAN_CHANNEL21,
CAN_CHANNEL22,
CAN_CHANNEL23,
CAN_CHANNEL24,
CAN_CHANNEL25,
CAN_CHANNEL26,
CAN_CHANNEL27,
CAN_CHANNEL28,
CAN_CHANNEL29,
CAN_CHANNEL30,
CAN_CHANNEL31
} CAN_CHANNEL;
Description
CAN Channel
This enumeration identifies the available CAN channels.
Members
Members Description
CAN_CHANNEL0 Channel 0 ID
CAN_CHANNEL1 Channel 1 ID
CAN_CHANNEL2 Channel 2 ID
CAN_CHANNEL3 Channel 3 ID
CAN_CHANNEL4 Channel 4 ID
CAN_CHANNEL5 Channel 5 ID
CAN_CHANNEL6 Channel 6 ID
CAN_CHANNEL7 Channel 7 ID
CAN_CHANNEL8 Channel 8 ID
CAN_CHANNEL9 Channel 9 ID
CAN_CHANNEL10 Channel 10 ID
CAN_CHANNEL11 Channel 11 ID
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CAN_CHANNEL12 Channel 12 ID
CAN_CHANNEL13 Channel 13 ID
CAN_CHANNEL14 Channel 14 ID
CAN_CHANNEL15 Channel 15 ID
CAN_CHANNEL16 Channel 16 ID
CAN_CHANNEL17 Channel 17 ID
CAN_CHANNEL18 Channel 18 ID
CAN_CHANNEL19 Channel 19 ID
CAN_CHANNEL20 Channel 20 ID
CAN_CHANNEL21 Channel 21 ID
CAN_CHANNEL22 Channel 22 ID
CAN_CHANNEL23 Channel 23 ID
CAN_CHANNEL24 Channel 24 ID
CAN_CHANNEL25 Channel 25 ID
CAN_CHANNEL26 Channel 26 ID
CAN_CHANNEL27 Channel 27 ID
CAN_CHANNEL28 Channel 28 ID
CAN_CHANNEL29 Channel 29 ID
CAN_CHANNEL30 Channel 30 ID
CAN_CHANNEL31 Channel 31 ID
5.6.4.5.11.2 CAN_CHANNEL_EVENT Enumeration
C
typedef enum {
CAN_RX_CHANNEL_NOT_EMPTY,
CAN_RX_CHANNEL_HALF_FULL,
CAN_RX_CHANNEL_FULL,
CAN_RX_CHANNEL_OVERFLOW,
CAN_RX_CHANNEL_ANY_EVENT,
CAN_TX_CHANNEL_EMPTY,
CAN_TX_CHANNEL_HALF_EMPTY,
CAN_TX_CHANNEL_NOT_FULL,
CAN_TX_CHANNEL_ANY_EVENT
} CAN_CHANNEL_EVENT;
Description
CAN Layer 3 Interrupts
This enumerates all the leading interrupts generated due to CAN transmit and receive events. This enumeration can be used to
enable or disable channel events and as a mask to check if a channel event is active.
A single or a combination of the interrupts can be logically ORed to specify the interrupt(s) to be enabled disabled or events to
check.
This enumeration is used by PLIB_CAN_ChannelEventEnable, PLIB_CAN_ChannelEventDisable,
PLIB_CAN_ChannelEventClear, and PLIB_CAN_ChannelEventGet functions.
Members
Members Description
CAN_RX_CHANNEL_NOT_EMPTY CAN Receive Channel Not Empty Event Mask
CAN_RX_CHANNEL_HALF_FULL CAN Receive Channel Half Full Event Mask
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CAN_RX_CHANNEL_FULL CAN Receive Channel Full Event Mask
CAN_RX_CHANNEL_OVERFLOW CAN Receive Channel Overflow Event Mask
CAN_RX_CHANNEL_ANY_EVENT CAN Receive Channel Any Event Mask
CAN_TX_CHANNEL_EMPTY CAN Transmit Channel Empty Event Mask
CAN_TX_CHANNEL_HALF_EMPTY CAN Transmit Channel Half Empty Event Mask
CAN_TX_CHANNEL_NOT_FULL CAN Transmit Channel Not Full Event Mask
CAN_TX_CHANNEL_ANY_EVENT CAN Transmit Channel Any Event Mask
5.6.4.5.11.3 CAN_CHANNEL_MASK Enumeration
C
typedef enum {
CAN_CHANNEL0_MASK,
CAN_CHANNEL1_MASK,
CAN_CHANNEL2_MASK,
CAN_CHANNEL3_MASK,
CAN_CHANNEL4_MASK,
CAN_CHANNEL5_MASK,
CAN_CHANNEL6_MASK,
CAN_CHANNEL7_MASK,
CAN_CHANNEL8_MASK,
CAN_CHANNEL9_MASK,
CAN_CHANNEL10_MASK,
CAN_CHANNEL11_MASK,
CAN_CHANNEL12_MASK,
CAN_CHANNEL13_MASK,
CAN_CHANNEL14_MASK,
CAN_CHANNEL15_MASK,
CAN_CHANNEL16_MASK,
CAN_CHANNEL17_MASK,
CAN_CHANNEL18_MASK,
CAN_CHANNEL19_MASK,
CAN_CHANNEL20_MASK,
CAN_CHANNEL21_MASK,
CAN_CHANNEL22_MASK,
CAN_CHANNEL23_MASK,
CAN_CHANNEL24_MASK,
CAN_CHANNEL25_MASK,
CAN_CHANNEL26_MASK,
CAN_CHANNEL27_MASK,
CAN_CHANNEL28_MASK,
CAN_CHANNEL29_MASK,
CAN_CHANNEL30_MASK,
CAN_CHANNEL31_MASK,
CAN_ANYCHANNEL_MASK
} CAN_CHANNEL_MASK;
Description
CAN Channel Masks
This enumeration identifies a series of useful masks. Each mask represents a CAN channel. These masks are used with the
PLIB_CAN_AllChannelEventsGet and PLIB_CAN_AllChannelOverflowStatusGet functions. The value returned by these
functions can be logically ANDed with any of these masks to check if an event or overflow event for that channel is active.
Members
Members Description
CAN_CHANNEL0_MASK Channel 0 Mask
CAN_CHANNEL1_MASK Channel 1 Mask
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CAN_CHANNEL2_MASK Channel 2 Mask
CAN_CHANNEL3_MASK Channel 3 Mask
CAN_CHANNEL4_MASK Channel 4 Mask
CAN_CHANNEL5_MASK Channel 5 Mask
CAN_CHANNEL6_MASK Channel 6 Mask
CAN_CHANNEL7_MASK Channel 7 Mask
CAN_CHANNEL8_MASK Channel 8 Mask
CAN_CHANNEL9_MASK Channel 9 Mask
CAN_CHANNEL10_MASK Channel 10 Mask
CAN_CHANNEL11_MASK Channel 11 Mask
CAN_CHANNEL12_MASK Channel 12 Mask
CAN_CHANNEL13_MASK Channel 13 Mask
CAN_CHANNEL14_MASK Channel 14 Mask
CAN_CHANNEL15_MASK Channel 15 Mask
CAN_CHANNEL16_MASK Channel 16 Mask
CAN_CHANNEL17_MASK Channel 17 Mask
CAN_CHANNEL18_MASK Channel 18 Mask
CAN_CHANNEL19_MASK Channel 19 Mask
CAN_CHANNEL20_MASK Channel 20 Mask
CAN_CHANNEL21_MASK Channel 21 Mask
CAN_CHANNEL22_MASK Channel 22 Mask
CAN_CHANNEL23_MASK Channel 23 Mask
CAN_CHANNEL24_MASK Channel 24 Mask
CAN_CHANNEL25_MASK Channel 25 Mask
CAN_CHANNEL26_MASK Channel 26 Mask
CAN_CHANNEL27_MASK Channel 27 Mask
CAN_CHANNEL28_MASK Channel 28 Mask
CAN_CHANNEL29_MASK Channel 29 Mask
CAN_CHANNEL30_MASK Channel 30 Mask
CAN_CHANNEL31_MASK Channel 31 Mask
CAN_ANYCHANNEL_MASK Channel any channel Mask
5.6.4.5.11.4 CAN_DNET_FILTER_SIZE Enumeration
C
typedef enum {
CAN_DNET_FILTER_SIZE_18_BIT,
CAN_DNET_FILTER_SIZE_17_BIT,
CAN_DNET_FILTER_SIZE_16_BIT,
CAN_DNET_FILTER_SIZE_15_BIT,
CAN_DNET_FILTER_SIZE_14_BIT,
CAN_DNET_FILTER_SIZE_13_BIT,
CAN_DNET_FILTER_SIZE_12_BIT,
CAN_DNET_FILTER_SIZE_11_BIT,
CAN_DNET_FILTER_SIZE_10_BIT,
CAN_DNET_FILTER_SIZE_9_BIT,
CAN_DNET_FILTER_SIZE_8_BIT,
CAN_DNET_FILTER_SIZE_7_BIT,
CAN_DNET_FILTER_SIZE_6_BIT,
CAN_DNET_FILTER_SIZE_5_BIT,
CAN_DNET_FILTER_SIZE_4_BIT,
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CAN_DNET_FILTER_SIZE_3_BIT,
CAN_DNET_FILTER_SIZE_2_BIT,
CAN_DNET_FILTER_SIZE_1_BIT,
CAN_DNET_FILTER_DISABLE
} CAN_DNET_FILTER_SIZE;
Description
CAN DeviceNet filter bit numbers.
This enumeration identifies the size of the DeviceNet filter in bits. If the size of the DeviceNet filter is "n", the "n" most significant
bits of the data payload are compared with the EID field of enabled filters.
Members
Members Description
CAN_DNET_FILTER_SIZE_18_BIT Compare up to data byte 2 bit 6 with filter mask bit 17
CAN_DNET_FILTER_SIZE_17_BIT Compare up to data byte 2 bit 7 with filter mask bit 16
CAN_DNET_FILTER_SIZE_16_BIT Compare up to data byte 1 bit 0 with filter mask bit 15
CAN_DNET_FILTER_SIZE_15_BIT Compare up to data byte 1 bit 1 with filter mask bit 14
CAN_DNET_FILTER_SIZE_14_BIT Compare up to data byte 1 bit 2 with filter mask bit 13
CAN_DNET_FILTER_SIZE_13_BIT Compare up to data byte 1 bit 3 with filter mask bit 12
CAN_DNET_FILTER_SIZE_12_BIT Compare up to data byte 1 bit 4 with filter mask bit 11
CAN_DNET_FILTER_SIZE_11_BIT Compare up to data byte 1 bit 5 with filter mask bit 10
CAN_DNET_FILTER_SIZE_10_BIT Compare up to data byte 1 bit 6 with filter mask bit 9
CAN_DNET_FILTER_SIZE_9_BIT Compare up to data byte 1 bit 7 with filter mask bit 8
CAN_DNET_FILTER_SIZE_8_BIT Compare up to data byte 0 bit 0 with filter mask bit 7
CAN_DNET_FILTER_SIZE_7_BIT Compare up to data byte 0 bit 1 with filter mask bit 6
CAN_DNET_FILTER_SIZE_6_BIT Compare up to data byte 0 bit 2 with filter mask bit 5
CAN_DNET_FILTER_SIZE_5_BIT Compare up to data byte 0 bit 3 with filter mask bit 4
CAN_DNET_FILTER_SIZE_4_BIT Compare up to data byte 0 bit 4 with filter mask bit 3
CAN_DNET_FILTER_SIZE_3_BIT Compare up to data byte 0 bit 5 with filter mask bit 2
CAN_DNET_FILTER_SIZE_2_BIT Compare up to data byte 0 bit 6 with filter mask bit 1
CAN_DNET_FILTER_SIZE_1_BIT Compare up to data byte 0 bit 7 with filter mask bit 0
CAN_DNET_FILTER_DISABLE Do not compare data bytes, Device Net Filtering is disabled
5.6.4.5.11.5 CAN_ERROR_STATE Enumeration
C
typedef enum {
CAN_TX_RX_WARNING_STATE,
CAN_RX_WARNING_STATE,
CAN_TX_WARNING_STATE,
CAN_RX_BUS_PASSIVE_STATE,
CAN_TX_BUS_PASSIVE_STATE,
CAN_TX_BUS_OFF_STATE
} CAN_ERROR_STATE;
Description
CAN Error States
This enumeration identifies all of the CAN module error states events. The CAN module enters or exits an error state as the
transmit and receive error counter values change. Refer to the CAN 2.0B specification for more details on the error states.
This enumeration is used with the PLIB_CAN_ErrorStateGet function.
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Members
Members Description
CAN_TX_RX_WARNING_STATE CAN Module is in a Transmit or Receive warning state.
CAN_RX_WARNING_STATE CAN Module is in a Receive warning state.
CAN_TX_WARNING_STATE CAN Module is in a Transmit warning state.
CAN_RX_BUS_PASSIVE_STATE CAN Receive is in a Bus Passive state.
CAN_TX_BUS_PASSIVE_STATE CAN Transmit is in a Bus Passive state.
CAN_TX_BUS_OFF_STATE CAN Transmit is in Bus Off state.
5.6.4.5.11.6 CAN_FILTER Enumeration
C
typedef enum {
CAN_CHANNEL0_EVENT,
CAN_CHANNEL1_EVENT,
CAN_CHANNEL2_EVENT,
CAN_CHANNEL3_EVENT,
CAN_CHANNEL4_EVENT,
CAN_CHANNEL5_EVENT,
CAN_CHANNEL6_EVENT,
CAN_CHANNEL7_EVENT,
CAN_CHANNEL8_EVENT,
CAN_CHANNEL9_EVENT,
CAN_CHANNEL10_EVENT,
CAN_CHANNEL11_EVENT,
CAN_CHANNEL12_EVENT,
CAN_CHANNEL13_EVENT,
CAN_CHANNEL14_EVENT,
CAN_CHANNEL15_EVENT,
CAN_CHANNEL16_EVENT,
CAN_CHANNEL17_EVENT,
CAN_CHANNEL18_EVENT,
CAN_CHANNEL19_EVENT,
CAN_CHANNEL20_EVENT,
CAN_CHANNEL21_EVENT,
CAN_CHANNEL22_EVENT,
CAN_CHANNEL23_EVENT,
CAN_CHANNEL24_EVENT,
CAN_CHANNEL25_EVENT,
CAN_CHANNEL26_EVENT,
CAN_CHANNEL27_EVENT,
CAN_CHANNEL28_EVENT,
CAN_CHANNEL29_EVENT,
CAN_CHANNEL30_EVENT,
CAN_CHANNEL31_EVENT,
CAN_NO_EVENT,
CAN_ERROR_EVENT,
CAN_WAKEUP_EVENT,
CAN_RX_CHANNEL_OVERFLOW_EVENT,
CAN_ADDRESS_ERROR_EVENT,
CAN_BUS_BANDWIDTH_ERROR,
CAN_TIMESTAMP_TIMER_EVENT,
CAN_MODE_CHANGE_EVENT,
CAN_FILTER0,
CAN_FILTER1,
CAN_FILTER2,
CAN_FILTER3,
CAN_FILTER4,
CAN_FILTER5,
CAN_FILTER6,
CAN_FILTER7,
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CAN_FILTER8,
CAN_FILTER9,
CAN_FILTER10,
CAN_FILTER11,
CAN_FILTER12,
CAN_FILTER13,
CAN_FILTER14,
CAN_FILTER15,
CAN_FILTER16,
CAN_FILTER17,
CAN_FILTER18,
CAN_FILTER19,
CAN_FILTER20,
CAN_FILTER21,
CAN_FILTER22,
CAN_FILTER23,
CAN_FILTER24,
CAN_FILTER25,
CAN_FILTER26,
CAN_FILTER27,
CAN_FILTER28,
CAN_FILTER29,
CAN_FILTER30,
CAN_FILTER31
} CAN_FILTER;
Description
CAN Event Code
This enumeration identifies all of the event codes returned by the PLIB_CAN_PendingEventsGet function.
Members
Members Description
CAN_CHANNEL0_EVENT An event on Channel 0 is active
CAN_CHANNEL1_EVENT An event on Channel 1 is active
CAN_CHANNEL2_EVENT An event on Channel 2 is active
CAN_CHANNEL3_EVENT An event on Channel 3 is active
CAN_CHANNEL4_EVENT An event on Channel 4 is active
CAN_CHANNEL5_EVENT An event on Channel 5 is active
CAN_CHANNEL6_EVENT An event on Channel 6 is active
CAN_CHANNEL7_EVENT An event on Channel 7 is active
CAN_CHANNEL8_EVENT An event on Channel 8 is active
CAN_CHANNEL9_EVENT An event on Channel 9 is active
CAN_CHANNEL10_EVENT An event on Channel 10 is active
CAN_CHANNEL11_EVENT An event on Channel 11 is active
CAN_CHANNEL12_EVENT An event on Channel 12 is active
CAN_CHANNEL13_EVENT An event on Channel 13 is active
CAN_CHANNEL14_EVENT An event on Channel 14 is active
CAN_CHANNEL15_EVENT An event on Channel 15 is active
CAN_CHANNEL16_EVENT An event on Channel 16 is active
CAN_CHANNEL17_EVENT An event on Channel 17 is active
CAN_CHANNEL18_EVENT An event on Channel 18 is active
CAN_CHANNEL19_EVENT An event on Channel 19 is active
CAN_CHANNEL20_EVENT An event on Channel 20 is active
CAN_CHANNEL21_EVENT An event on Channel 21 is active
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CAN_CHANNEL22_EVENT An event on Channel 22 is active
CAN_CHANNEL23_EVENT An event on Channel 23 is active
CAN_CHANNEL24_EVENT An event on Channel 24 is active
CAN_CHANNEL25_EVENT An event on Channel 25 is active
CAN_CHANNEL26_EVENT An event on Channel 26 is active
CAN_CHANNEL27_EVENT An event on Channel 27 is active
CAN_CHANNEL28_EVENT An event on Channel 28 is active
CAN_CHANNEL29_EVENT An event on Channel 29 is active
CAN_CHANNEL30_EVENT An event on Channel 30 is active
CAN_CHANNEL31_EVENT An event on Channel 31 is active
CAN_NO_EVENT No Event is active
CAN_ERROR_EVENT CAN Bus Error Event is active
CAN_WAKEUP_EVENT CAN Bus Wakeup Event is active
CAN_RX_CHANNEL_OVERFLOW_EVENT CAN Receive Channel Overflow Event is active
CAN_ADDRESS_ERROR_EVENT CAN Address Error Event is active
CAN_BUS_BANDWIDTH_ERROR CAN Bus Bandwidth Error is active
CAN_TIMESTAMP_TIMER_EVENT CAN Timestamp Timer Overflow event is active
CAN_MODE_CHANGE_EVENT CAN Module Mode Change is active
5.6.4.5.11.7 CAN_FILTER_MASK Enumeration
C
typedef enum {
CAN_FILTER_MASK0,
CAN_FILTER_MASK1,
CAN_FILTER_MASK2,
CAN_FILTER_MASK3,
CAN_NUMBER_OF_FILTER_MASKS
} CAN_FILTER_MASK;
Description
CAN Filter Masks
This enumeration identifies the available filters masks in each CAN module.
Members
Members Description
CAN_FILTER_MASK0 CAN Filter Mask 0
CAN_FILTER_MASK1 CAN Filter Mask 1
CAN_FILTER_MASK2 CAN Filter Mask 2
CAN_FILTER_MASK3 CAN Filter Mask 3
CAN_NUMBER_OF_FILTER_MASKS Total number of filter masks in the module
5.6.4.5.11.8 CAN_FILTER_MASK_TYPE Enumeration
C
typedef enum {
CAN_FILTER_MASK_IDE_TYPE,
CAN_FILTER_MASK_ANY_TYPE
} CAN_FILTER_MASK_TYPE;
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Description
CAN Filter Mask Type
This enumeration specifies the filter mask type. The filter mask can either process messages with any type of ID (extended or
standard) or can only process by ID specified in the filter configuration. For example, if the filter associated with the mask only
accepts EID type messages and if the mask is configured to process by ID type, then SID messages will not be accepted. If the
mask is configured to process any type of message, both SID and EID messages will be accepted on a filter match.
Members
Members Description
CAN_FILTER_MASK_IDE_TYPE Mask processes only Filter type of message
CAN_FILTER_MASK_ANY_TYPE Mask processes any type (SID or EID) of message
5.6.4.5.11.9 CAN_FUNCTONAL_MODES Enumeration
C
typedef enum {
CAN_LEGACY_MODE0,
CAN_ENHANCED_LEGACY_MODE1,
CAN_ENHANCED_FIFO_MODE2
} CAN_FUNCTONAL_MODES;
Description
CAN Functional Modes
This enumerates all operating modes of the CAN module. The application should set the desired mode using the
PLIB_CAN_FunctionalModeSelect function, and should then use the PLIB_CAN_FunctionalModeGet function to check if the
CAN module has entered the requested mode.
Members
Members Description
CAN_LEGACY_MODE0 CAN Mode 0, Legacy Mode. This mode enabled minimum features. Hides
features of Enhanced CAN. This is the default mode of operation on all Reset
conditions
CAN_ENHANCED_LEGACY_MODE1 CAN Mode 1, Enhanced Legacy Mode. Enables ECAN features. Enables
DeviceNet filtering.
CAN_ENHANCED_FIFO_MODE2 CAN Mode 2, Enhanced FIFO Mode. In this mode, two or more receive buffers are
used to form the receive FIFO buffer.
5.6.4.5.11.10 CAN_ID_TYPE Enumeration
C
typedef enum {
CAN_EID,
CAN_SID
} CAN_ID_TYPE;
Description
CAN ID Type
This enumeration specifies the two CAN ID types: Standard and Extended. The Standard Type ID is 11 bits long and the
Extended ID is 29 bits long. This enumeration then specifies the type of the ID specified while configuring filters and filter masks.
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Members
Members Description
CAN_EID CAN Extended ID
CAN_SID CAN Standard ID
5.6.4.5.11.11 CAN_MODULE_EVENT Enumeration
C
typedef enum {
CAN_TX_EVENT,
CAN_RX_EVENT,
CAN_TIMESTAMP_TIMER_OVERFLOW_EVENT,
CAN_OPERATION_MODE_CHANGE_EVENT,
CAN_RX_OVERFLOW_EVENT,
CAN_SYSTEM_ERROR_EVENT,
CAN_BUS_ERROR_EVENT,
CAN_BUS_ACTIVITY_WAKEUP_EVENT,
CAN_INVALID_RX_MESSAGE_EVENT
} CAN_MODULE_EVENT;
Description
CAN Module Events
This enumeration identifies all of the CAN module events. A combination of listed events can be logically ORed to enable or
disable module level events. Similarly, a combination of events can be checked if active.
This enumeration is used with the PLIB_CAN_ModuleEventEnable function and PLIB_CAN_ModuleEventGet function.
Members
Members Description
CAN_TX_EVENT Transmit channel event. This event will occur if any of the Transmit Channel
events are active.
CAN_RX_EVENT Receive channel event. This event will occur if any of the Receive Channel
events are active.
CAN_TIMESTAMP_TIMER_OVERFLOW_EVENT CAN Timer Stamp Timer Overflow event occurs. This event occurs when the
Timestamp Timer has overflowed.
CAN_OPERATION_MODE_CHANGE_EVENT CAN Operation Mode Change Event. This event occurs when the CAN
module has changed it's operating mode successfully.
CAN_RX_OVERFLOW_EVENT CAN Receive Channel Overflow Event. This event occurs when any of the
Receive Channel has overflowed.
CAN_SYSTEM_ERROR_EVENT CAN System Error Event. This event occurs when CAN module tries to
access an invalid Device RAM location.
CAN_BUS_ERROR_EVENT CAN Bus Error Event. This event occurs when the CAN module cannot
access the system bus.
CAN_BUS_ACTIVITY_WAKEUP_EVENT CAN Bus Activity Wakeup. This event occurs when the device is in Sleep
mode and bus activity is detected on the CAN bus.
CAN_INVALID_RX_MESSAGE_EVENT CAN Bus Invalid Receive Message Event. This event occurs when the CAN
module receives an Invalid message.
5.6.4.5.11.12 CAN_MODULE_ID Enumeration
C
typedef enum {
CAN_ID_1,
CAN_ID_2,
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CAN_ID_3,
CAN_NUMBER_OF_MODULES
} CAN_MODULE_ID;
Description
Enumeration: CAN_MODULE_ID
This enumeration defines the number of modules that are available on the microcontroller. This is the super set of all the
possible instances that might be available on Microchip microcontrollers.
Refer to the specific device data sheet to get the correct number of modules defined for the desired microcontroller.
Members
Members Description
CAN_NUMBER_OF_MODULES The total number of modules available.
5.6.4.5.11.13 CAN_MSG_EID Structure
C
typedef struct {
unsigned data_length_code : 4;
unsigned reserved0 : 1;
unsigned unimplemented1 : 3;
unsigned reserved1 : 1;
unsigned remote_request : 1;
unsigned eid : 18;
unsigned ide : 1;
unsigned sub_remote_req : 1;
unsigned unimplemented2 : 2;
} CAN_MSG_EID;
Description
CAN Message EID Word
This data structure represents the EID section of the CAN transmit and receive message. The data structure is an element of the
CAN_TX_MSG_BUFFER and CAN_RX_MSG_BUFFER data structure.
Members
Members Description
unsigned data_length_code : 4; Data Length Control. Specifies the size of the data payload section of the CAN
packet. Valid values are 0x0 - 0x8
unsigned reserved0 : 1; Reserved bit. Should be always 0.
unsigned unimplemented1 : 3; Unimplemented bit. Should be always 0.
unsigned reserved1 : 1; Reserved bit. Should be always 0.
unsigned remote_request : 1; Remote Transmit Request bit. Should be set for RTR messages, clear otherwise.
unsigned eid : 18; CAN Transmit and Receive Extended ID field. Valid values are in range 0x0 -
0x3FFFF
unsigned ide : 1; Identifier bit. If 0 means that message is SID. If 1 means that message is EID type.
unsigned sub_remote_req : 1; Substitute Remote request bit. This bit should always be clear for an EID
message. It is ignored for an SID message.
unsigned unimplemented2 : 2; Unimplemented bit. Should be always 0.
5.6.4.5.11.14 CAN_OPERATION_MODES Enumeration
C
typedef enum {
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CAN_LISTEN_ALL_MESSAGES_MODE,
CAN_CONFIGURATION_MODE,
CAN_LISTEN_ONLY_MODE,
CAN_LOOPBACK_MODE,
CAN_DISABLE_MODE,
CAN_NORMAL_MODE
} CAN_OPERATION_MODES;
Description
CAN Operation Modes
This enumerates all operating modes of the CAN module. The application should set the desired mode using the
PLIB_CAN_OperationModeSelect function, and should then use the PLIB_CAN_OperationModeGet function to check if the CAN
module has entered the requested mode.
Members
Members Description
CAN_LISTEN_ALL_MESSAGES_MODE CAN Listen All Message Mode. The CAN module listens to all messages,
regardless of errors
CAN_CONFIGURATION_MODE CAN Configuration Mode. Various CAN module settings can be configured in this
mode
CAN_LISTEN_ONLY_MODE CAN Listen Only Mode. In this mode, the CAN module will not acknowledge signal
and will not participate in error signaling. All messages are captured
CAN_LOOPBACK_MODE CAN Loopback Mode. In this mode, the CAN module Transmit is internally
connected to the Receive line. This mode is useful for debugging operation
CAN_DISABLE_MODE CAN Disable Mode. The CAN module does not transmit or receive messages in
this mode
CAN_NORMAL_MODE CAN Normal Operation Mode. The CAN module transmits and receives messages
in this mode
5.6.4.5.11.15 CAN_RECEIVE_CHANNEL Enumeration
C
typedef enum {
CAN_RECEIVE_CHANNEL0,
CAN_RECEIVE_CHANNEL1
} CAN_RECEIVE_CHANNEL;
Description
CAN Receive Channels
This enumerates all CAN module receive channels(channels that are not allowed to be configured for transmit).
Members
Members Description
CAN_RECEIVE_CHANNEL0 CAN receive channel 0
CAN_RECEIVE_CHANNEL1 CAN receive channel 1
5.6.4.5.11.16 CAN_RECEIVE_MODES Enumeration
C
typedef enum {
CAN_RECEIVE_ALL_MSG_MODE,
CAN_RECEIVE_VALID_EID_MODE,
CAN_RECEIVE_VALID_STD_MODE,
CAN_RECEIVE_VALID_MODE
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} CAN_RECEIVE_MODES;
Description
CAN Receive Modes
This enumerates all operating modes of the CAN module. The application should set the desired mode using the
PLIB_CAN_ReceiveModeSelect function, and should then use the PLIB_CAN_ReceiveModeGet function to check if the CAN
module has entered the requested mode.
Members
Members Description
CAN_RECEIVE_ALL_MSG_MODE Receive all messages(Including with errors). The message filters will not be
considered
CAN_RECEIVE_VALID_EID_MODE Receive only valid messages(with error will be discarded, filter will be considered)
with extended identifier. This is applicable only for functional mode 0
CAN_RECEIVE_VALID_STD_MODE Receive only valid messages(with error will be discarded, filter will be considered)
with standard identifier. This is applicable only for functional mode 0
CAN_RECEIVE_VALID_MODE Receive only valid messages(with error will be discarded, filter will be considered)
with extended identifier/standard identifier Based on the configuration
5.6.4.5.11.17 CAN_RX_DATA_MODE Enumeration
C
typedef enum {
CAN_RX_DATA_ONLY,
CAN_RX_FULL_RECEIVE
} CAN_RX_DATA_MODE;
Description
CAN Receive Channel Data Only Mode
This enumeration specifies the status of the CAN receive channel data-only feature. If the feature is enabled, the CAN module
will store only the data payload portion of the received CAN message. If the Full Receive mode is specified, the CAN module
stores the entire CAN message (ID field plus data payload). The receive channel can be either in Data-Only mode or Full
Receive mode.
Members
Members Description
CAN_RX_DATA_ONLY CAN Receive Channel Data Only Mode is enabled
CAN_RX_FULL_RECEIVE CAN Receive Channel Full Receive Mode is enabled
5.6.4.5.11.18 CAN_RX_MSG_BUFFER Union
C
typedef union {
struct {
CAN_RX_MSG_SID msgSID;
CAN_MSG_EID msgEID;
uint8_t data[8];
}
uint8_t dataOnlyMsgData[8];
uint32_t messageWord[4];
} CAN_RX_MSG_BUFFER;
Description
CAN Receive Message Buffer
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This data structure represents the CAN receive message buffer. Received messages could be either full-receive messages or
data-only messages. A full-receive message contains the message header and data payload section. For a full-receive CAN
receive channel, the caller should use the msgSID, msgEID and data members. A data-only message contains only an 8-byte
data payload. While using this data structure with a data-only type of CAN receive channel, the caller should use the
dataOnlyMsgData member of the structure and should read only 8 bytes of data.
Members
Members Description
CAN_RX_MSG_SID msgSID; This is SID portion of the CAN Receive message
CAN_MSG_EID msgEID; This is EID portion of the CAN Receive message
uint8_t data[8]; This is the data payload section of the received message
uint8_t dataOnlyMsgData[8]; This can be used if the message buffer is to be read from a Data-Only type of
CAN Receive Channel
uint32_t messageWord[4]; This is CAN Receive message organized as a set of 32 bit words
5.6.4.5.11.19 CAN_RX_MSG_SID Structure
C
typedef struct {
unsigned sid : 11;
unsigned filter_hit : 5;
unsigned msg_timestamp : 16;
} CAN_RX_MSG_SID;
Description
CAN Receive Message SID Word
This data structure represents the SID section of the CAN receive message. The data structure is an element of the
CAN_RX_MSG_BUFFER data structure.
Members
Members Description
unsigned sid : 11; SID of the Received CAN Message
unsigned filter_hit : 5; Filter which accepted this message
unsigned msg_timestamp : 16; Time stamp of the received message. This is valid only if the Timestamping is
enabled
5.6.4.5.11.20 CAN_TIME_SEGMENT_LENGTH Enumeration
C
typedef enum {
CAN_TIME_SEGMENT_LEN_8TQ,
CAN_TIME_SEGMENT_LEN_7TQ,
CAN_TIME_SEGMENT_LEN_6TQ,
CAN_TIME_SEGMENT_LEN_5TQ,
CAN_TIME_SEGMENT_LEN_4TQ,
CAN_TIME_SEGMENT_LEN_3TQ,
CAN_TIME_SEGMENT_LEN_2TQ,
CAN_TIME_SEGMENT_LEN_1TQ
} CAN_TIME_SEGMENT_LENGTH;
Description
CAN Segment length
This enumeration defines values that can be assigned while defining the number of Time Quanta in a bit.
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Members
Members Description
CAN_TIME_SEGMENT_LEN_8TQ Segment length is 8 x TQ
CAN_TIME_SEGMENT_LEN_7TQ Segment length is 7 x TQ
CAN_TIME_SEGMENT_LEN_6TQ Segment length is 6 x TQ
CAN_TIME_SEGMENT_LEN_5TQ Segment length is 5 x TQ
CAN_TIME_SEGMENT_LEN_4TQ Segment length is 4 x TQ
CAN_TIME_SEGMENT_LEN_3TQ Segment length is 3 x TQ
CAN_TIME_SEGMENT_LEN_2TQ Segment length is 2 x TQ
CAN_TIME_SEGMENT_LEN_1TQ Segment length is 1 x TQ
5.6.4.5.11.21 CAN_TX_CHANNEL_STATUS Enumeration
C
typedef enum {
CAN_TX_CHANNEL_TRANSMITTING,
CAN_TX_CHANNEL_ERROR,
CAN_TX_CHANNEL_ARBITRATION_LOST
} CAN_TX_CHANNEL_STATUS;
Description
CAN Transmit Channel Condition
This enumeration identifies the possible transmit channel condition. These masks can be logically ANDed with values returned
by the PLIB_CAN_TransmitChannelStatusGet function to check if a condition is active.
Members
Members Description
CAN_TX_CHANNEL_TRANSMITTING CAN Transmit Channel is currently Transmitting.
CAN_TX_CHANNEL_ERROR CAN Transmit Channel Error has occurred.
CAN_TX_CHANNEL_ARBITRATION_LOST CAN Transmit Channel lost arbitration.
5.6.4.5.11.22 CAN_TX_MSG_BUFFER Union
C
typedef union {
struct {
CAN_TX_MSG_SID msgSID;
CAN_MSG_EID msgEID;
unsigned char data[8];
}
uint32_t messageWord[4];
} CAN_TX_MSG_BUFFER;
Description
CAN Transmit Message Buffer
This data structure represents the CAN transmit message buffer. This should be used for writing data to a CAN transmit channel
and transmitting data. A pointer to this type of data structure is returned by the PLIB_CAN_TransmitBufferGet function.
The data structure allows the transmit message buffer to be accessed as fields of a CAN transmit message and also as an array
of four 32-bit words. The latter allows for quick initialization of the message buffer.
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Members
Members Description
CAN_TX_MSG_SID msgSID; This is SID portion of the CAN Transmit message
CAN_MSG_EID msgEID; This is EID portion of the CAN Transmit message
unsigned char data[8]; This is the data portion of the CAN Transmit message
uint32_t messageWord[4]; This is CAN Transmit message organized as a set of 32 bit words
5.6.4.5.11.23 CAN_TX_MSG_SID Structure
C
typedef struct {
unsigned sid : 11;
} CAN_TX_MSG_SID;
Description
CAN Transmit Message SID Word
This data structure represents the SID section of the CAN transmit message. The data structure is an element of the
CAN_TX_MSG_BUFFER data structure.
Members
Members Description
unsigned sid : 11; CAN Transmit Message Standard ID. This value should be between 0x0 - 0x7FF
5.6.4.5.11.24 CAN_TX_RTR Enumeration
C
typedef enum {
CAN_TX_RTR_ENABLED,
CAN_TX_RTR_DISABLED
} CAN_TX_RTR;
Description
CAN Transmit Channel Remote Transmit Request (RTR)
This enumeration specifies the status of the CAN RTR feature for a CAN transmit channel. The RTR feature allows a node on
the CAN Bus to request a transmission from another node on the bus. The responding node in this case should have a RTR
enabled Transmit Channel in order to be able to respond to this request.
Members
Members Description
CAN_TX_RTR_ENABLED CAN Transmit Channel RTR Feature is enabled
CAN_TX_RTR_DISABLED CAN Transmit Channel RTR Feature is disabled
5.6.4.5.11.25 CAN_TXCHANNEL_PRIORITY Enumeration
C
typedef enum {
CAN_LOWEST_PRIORITY,
CAN_LOW_MEDIUM_PRIORITY,
CAN_HIGH_MEDIUM_PRIORITY,
CAN_HIGHEST_PRIORITY
} CAN_TXCHANNEL_PRIORITY;
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Description
CAN Transmit Channel Priority
This enumeration identifies the available transmit channel priorities. A transmit channel has its own natural priority order, which
determines priority when two or more transmit channels are assigned the same priority level. Channel 1 has higher natural
priority than channel 0 and channel 2 has a natural priority than channel 1, and so on.
Members
Members Description
CAN_LOWEST_PRIORITY CAN lowest priority
CAN_LOW_MEDIUM_PRIORITY CAN low medium priority
CAN_HIGH_MEDIUM_PRIORITY CAN high medium priority
CAN_HIGHEST_PRIORITY CAN highest priority
5.6.4.5.11.26 CAN_RX_DATA_ONLY_SIZE_BYTES Macro
C
#define CAN_RX_DATA_ONLY_SIZE_BYTES 8
Description
CAN Data-Only Receive Message Buffer
This contant is used as the size of the CAN data-only receive message buffer in bytes.
5.6.4.5.11.27 CAN_TX_RX_MESSAGE_SIZE_BYTES Macro
C
#define CAN_TX_RX_MESSAGE_SIZE_BYTES 16
Description
CAN Transmit and Receive Message Buffer size
This contant is used as the array size of the CAN transmit and full receive message buffer.
5.6.4.5.12 Feature Existance Routines
5.6.4.5.12.1 PLIB_CAN_ExistsActiveStatus Function
C
bool PLIB_CAN_ExistsActiveStatus(
CAN_MODULE_ID index
);
Description
This function identifies whether the ActiveStatus feature is available on the CAN module. When this function returns true, this
function is supported on the device:
• PLIB_CAN_IsActive
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ActiveStatus feature is supported on the device
• false = The ActiveStatus feature is not supported on the device
Remarks
None.
5.6.4.5.12.2 PLIB_CAN_ExistsAllChannelEvents Function
C
bool PLIB_CAN_ExistsAllChannelEvents(
CAN_MODULE_ID index
);
Description
This function identifies whether the AllChannelEvents feature is available on the CAN module. When this function returns true,
this function is supported on the device:
• PLIB_CAN_AllChannelEventsGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The AllChannelEvents feature is supported on the device
• false = The AllChannelEvents feature is not supported on the device
Remarks
None.
5.6.4.5.12.3 PLIB_CAN_ExistsAllChannelOverflow Function
C
bool PLIB_CAN_ExistsAllChannelOverflow(
CAN_MODULE_ID index
);
Description
This function identifies whether the AllChannelOverflow feature is available on the CAN module. When this function returns true,
this function is supported on the device:
• PLIB_CAN_AllChannelOverflowStatusGet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The AllChannelOverflow feature is supported on the device
• false = The AllChannelOverflow feature is not supported on the device
Remarks
None.
5.6.4.5.12.4 PLIB_CAN_ExistsBusActivityWakeup Function
C
bool PLIB_CAN_ExistsBusActivityWakeup(
CAN_MODULE_ID index
);
Description
This function identifies whether the BusActivityWakeup feature is available on the CAN module. When this function returns true,
these functions are supported on the device:
• PLIB_CAN_BusActivityWakeupEnable
• PLIB_CAN_BusActivityWakeupDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The BusActivityWakeup feature is supported on the device
• false = The BusActivityWakeup feature is not supported on the device
Remarks
None.
5.6.4.5.12.5 PLIB_CAN_ExistsBusLine3TimesSampling Function
C
bool PLIB_CAN_ExistsBusLine3TimesSampling(
CAN_MODULE_ID index
);
Description
This function identifies whether the BusLine3TimesSampling feature is available on the CAN module. When this function returns
true, these functions are supported on the device:
• PLIB_CAN_BusLine3TimesSamplingEnable
• PLIB_CAN_BusLine3TimesSamplingDisable
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The BusLine3TimesSampling feature is supported on the device
• false = The BusLine3TimesSampling feature is not supported on the device
Remarks
None.
5.6.4.5.12.6 PLIB_CAN_ExistsChannelEvent Function
C
bool PLIB_CAN_ExistsChannelEvent(
CAN_MODULE_ID index
);
Description
This function identifies whether the ChannelEventGet feature is available on the CAN module. When this function returns true,
these functions are supported on the device:
• PLIB_CAN_ChannelEventGet
• PLIB_CAN_ChannelEventClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ChannelEventGet feature is supported on the device
• false = The ChannelEventGet feature is not supported on the device
Remarks
None.
5.6.4.5.12.7 PLIB_CAN_ExistsChannelEventEnable Function
C
bool PLIB_CAN_ExistsChannelEventEnable(
CAN_MODULE_ID index
);
Description
This function identifies whether the ChannelEventEnable feature is available on the CAN module. When this function returns
true, these functions are supported on the device:
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• PLIB_CAN_ChannelEventEnable
• PLIB_CAN_ChannelEventDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ChannelEventEnable feature is supported on the device
• false = The ChannelEventEnable feature is not supported on the device
Remarks
None.
5.6.4.5.12.8 PLIB_CAN_ExistsChannelForReceiveSet Function
C
bool PLIB_CAN_ExistsChannelForReceiveSet(
CAN_MODULE_ID index
);
Description
This function identifies whether the ChannelForReceiveSet feature is available on the CAN module. When this function returns
true, this function is are supported on the device:
• PLIB_CAN_ChannelForReceiveSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ChannelForReceiveSet feature is supported on the device
• false = The ChannelForReceiveSet feature is not supported on the device
Remarks
None.
5.6.4.5.12.9 PLIB_CAN_ExistsChannelForTransmitSet Function
C
bool PLIB_CAN_ExistsChannelForTransmitSet(
CAN_MODULE_ID index
);
Description
This function identifies whether the ChannelForTransmitSet feature is available on the CAN module. When this function returns
true, this function is supported on the device:
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• PLIB_CAN_ChannelForTransmitSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ChannelForTransmitSet feature is supported on the device
• false = The ChannelForTransmitSet feature is not supported on the device
Remarks
None.
5.6.4.5.12.10 PLIB_CAN_ExistsChannelReset Function
C
bool PLIB_CAN_ExistsChannelReset(
CAN_MODULE_ID index
);
Description
This function identifies whether the ChannelReset feature is available on the CAN module. When this function returns true, these
functions are supported on the device:
• PLIB_CAN_ChannelReset
• PLIB_CAN_ChannelResetIsComplete
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ChannelReset feature is supported on the device
• false = The ChannelReset feature is not supported on the device
Remarks
None.
5.6.4.5.12.11 PLIB_CAN_ExistsChannelUpdate Function
C
bool PLIB_CAN_ExistsChannelUpdate(
CAN_MODULE_ID index
);
Description
This function identifies whether the ChannelUpdate feature is available on the CAN module. When this function returns true, this
function is supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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• PLIB_CAN_ChannelUpdate
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ChannelUpdate feature is supported on the device
• false = The ChannelUpdate feature is not supported on the device
Remarks
None.
5.6.4.5.12.12 PLIB_CAN_ExistsDeviceNet Function
C
bool PLIB_CAN_ExistsDeviceNet(
CAN_MODULE_ID index
);
Description
This function identifies whether the DeviceNet feature is available on the CAN module. When this function returns true, this
function is supported on the device:
• PLIB_CAN_DeviceNetConfigure
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The DeviceNet feature is supported on the device
• false = The DeviceNet feature is not supported on the device
Remarks
None.
5.6.4.5.12.13 PLIB_CAN_ExistsEnableControl Function
C
bool PLIB_CAN_ExistsEnableControl(
CAN_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the CAN module. When this function returns true, these
functions are supported on the device:
• PLIB_CAN_Enable
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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• PLIB_CAN_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The EnableControl feature is supported on the device
• false = The EnableControl feature is not supported on the device
Remarks
None.
5.6.4.5.12.14 PLIB_CAN_ExistsErrorState Function
C
bool PLIB_CAN_ExistsErrorState(
CAN_MODULE_ID index
);
Description
This function identifies whether the ErrorStateGet feature is available on the CAN module. When this function returns true, this
function is supported on the device:
• PLIB_CAN_ErrorStateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ErrorStateGet feature is supported on the device
• false = The ErrorStateGet feature is not supported on the device
Remarks
None.
5.6.4.5.12.15 PLIB_CAN_ExistsFilterConfigure Function
C
bool PLIB_CAN_ExistsFilterConfigure(
CAN_MODULE_ID index
);
Description
This function identifies whether the FilterConfigure feature is available on the CAN module. When this function returns true, this
function is supported on the device:
• PLIB_CAN_FilterConfigure
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The FilterConfigure feature is supported on the device
• false = the FilterConfigure feature is not supported on the device
Remarks
None.
5.6.4.5.12.16 PLIB_CAN_ExistsFilterEnable Function
C
bool PLIB_CAN_ExistsFilterEnable(
CAN_MODULE_ID index
);
Description
This function identifies whether the FilterEnable feature is available on the CAN module. When this function returns true, these
functions are supported on the device:
• PLIB_CAN_FilterEnable
• PLIB_CAN_FilterDisable
• PLIB_CAN_FilterIsDisabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The FilterEnable feature is supported on the device
• false = The FilterEnable feature is not supported on the device
Remarks
None.
5.6.4.5.12.17 PLIB_CAN_ExistsFilterMaskConfigure Function
C
bool PLIB_CAN_ExistsFilterMaskConfigure(
CAN_MODULE_ID index
);
Description
This function identifies whether the FilterMaskConfigure feature is available on the CAN module. When this function returns true,
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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this function is supported on the device:
• PLIB_CAN_FilterMaskConfigure
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The FilterMaskConfigure feature is supported on the device
• false = The FilterMaskConfigure feature is not supported on the device
Remarks
None.
5.6.4.5.12.18 PLIB_CAN_ExistsFilterToChannelLink Function
C
bool PLIB_CAN_ExistsFilterToChannelLink(
CAN_MODULE_ID index
);
Description
This function identifies whether the FilterToChannelLink feature is available on the CAN module. When this function returns true,
this function is supported on the device:
• PLIB_CAN_FilterToChannelLink
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The FilterToChannelLink feature is supported on the device
• false = The FilterToChannelLink feature is not supported on the device
Remarks
None.
5.6.4.5.12.19 PLIB_CAN_ExistsFunctionalMode Function
C
bool PLIB_CAN_ExistsFunctionalMode(
CAN_MODULE_ID index
);
Description
This function identifies whether the FunctionalModeSelect feature is available on the CAN module. When this function returns
true, these functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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• PLIB_CAN_FunctionalModeSelect
• PLIB_CAN_FunctionalModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The FunctionalModeSelect feature is supported on the device
• false = The FunctionalModeSelect feature is not supported on the device
Remarks
None.
5.6.4.5.12.20 PLIB_CAN_ExistsLatestFilterMatchGet Function
C
bool PLIB_CAN_ExistsLatestFilterMatchGet(
CAN_MODULE_ID index
);
Description
This function identifies whether the LatestFilterMatchGet feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_LatestFilterMatchGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The LatestFilterMatchGet feature is supported on the device
• false = The LatestFilterMatchGet feature is not supported on the device
Remarks
None.
5.6.4.5.12.21 PLIB_CAN_ExistsMemoryBufferAssign Function
C
bool PLIB_CAN_ExistsMemoryBufferAssign(
CAN_MODULE_ID index
);
Description
This function identifies whether the MemoryBufferAssign feature is available on the CAN module. When this function returns
true, this function is supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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• PLIB_CAN_MemoryBufferAssign
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The MemoryBufferAssign feature is supported on the device
• false = The MemoryBufferAssign feature is not supported on the device
Remarks
None.
5.6.4.5.12.22 PLIB_CAN_ExistsMessageIsReceived Function
C
bool PLIB_CAN_ExistsMessageIsReceived(
CAN_MODULE_ID index
);
Description
This function identifies whether the MessageIsReceived feature is available on the CAN module. When this function returns true,
this function is supported on the device:
• PLIB_CAN_MessageIsReceived
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The MessageIsReceived feature is supported on the device
• false = The MessageIsReceived feature is not supported on the device
Remarks
None.
5.6.4.5.12.23 PLIB_CAN_ExistsModuleEventClear Function
C
bool PLIB_CAN_ExistsModuleEventClear(
CAN_MODULE_ID index
);
Description
This function identifies whether the ModuleEvents feature is available on the CAN module. When this function returns true, these
functions are supported on the device:
• PLIB_CAN_ModuleEventClear
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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• PLIB_CAN_ModuleEventGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ModuleEvents feature is supported on the device
• false = The ModuleEvents feature is not supported on the device
Remarks
None.
5.6.4.5.12.24 PLIB_CAN_ExistsModuleEventEnable Function
C
bool PLIB_CAN_ExistsModuleEventEnable(
CAN_MODULE_ID index
);
Description
This function identifies whether the ModuleEventEnable feature is available on the CAN module. When this function returns true,
these functions are supported on the device:
• PLIB_CAN_ModuleEventEnable
• PLIB_CAN_ModuleEventDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ModuleEventEnable feature is supported on the device
• false = The ModuleEventEnable feature is not supported on the device
Remarks
None.
5.6.4.5.12.25 PLIB_CAN_ExistsModuleInfo Function
C
bool PLIB_CAN_ExistsModuleInfo(
CAN_MODULE_ID index
);
Description
This function identifies whether the ModuleInformation feature is available on the CAN module. When this function returns true,
these functions are supported on the device:
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• PLIB_CAN_TotalChannelsGet
• PLIB_CAN_TotalFiltersGet
• PLIB_CAN_TotalMasksGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ModuleInformation feature is supported on the device
• false = The ModuleInformation feature is not supported on the device
Remarks
None.
5.6.4.5.12.26 PLIB_CAN_ExistsOperationModeRead Function
C
bool PLIB_CAN_ExistsOperationModeRead(
CAN_MODULE_ID index
);
Description
This function identifies whether the OperationModeRead feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_OperationModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The OperationModeRead feature is supported on the device
• false = The OperationModeRead feature is not supported on the device
Remarks
None.
5.6.4.5.12.27 PLIB_CAN_ExistsOperationModeWrite Function
C
bool PLIB_CAN_ExistsOperationModeWrite(
CAN_MODULE_ID index
);
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Description
This function identifies whether the OperationModeSet feature is available on the CAN module. When this function returns true,
this function is supported on the device:
• PLIB_CAN_OperationModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The OperationModeSet feature is supported on the device
• false = The OperationModeSet feature is not supported on the device
Remarks
None.
5.6.4.5.12.28 PLIB_CAN_ExistsPendingEventsGet Function
C
bool PLIB_CAN_ExistsPendingEventsGet(
CAN_MODULE_ID index
);
Description
This function identifies whether the PendingEventsGet feature is available on the CAN module. When this function returns true,
this function is supported on the device:
• PLIB_CAN_PendingEventsGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PendingEventsGet feature is supported on the device
• false = The PendingEventsGet feature is not supported on the device
Remarks
None.
5.6.4.5.12.29 PLIB_CAN_ExistsPendingTransmissionsAbort Function
C
bool PLIB_CAN_ExistsPendingTransmissionsAbort(
CAN_MODULE_ID index
);
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Description
This function identifies whether the PendingTransmissionsAbort feature is available on the CAN module. When this function
returns true, this function is supported on the device:
• PLIB_CAN_PendingTransmissionsAbort
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PendingTransmissionsAbort feature is supported on the device
• false = The PendingTransmissionsAbort feature is not supported on the device
Remarks
None.
5.6.4.5.12.30 PLIB_CAN_ExistsPhaseSegment1Length Function
C
bool PLIB_CAN_ExistsPhaseSegment1Length(
CAN_MODULE_ID index
);
Description
This function identifies whether the PhaseSegment1Length feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_PhaseSegment1LengthSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PhaseSegment1Length feature is supported on the device
• false = The PhaseSegment1Length feature is not supported on the device
Remarks
None.
5.6.4.5.12.31 PLIB_CAN_ExistsPhaseSegment2Length Function
C
bool PLIB_CAN_ExistsPhaseSegment2Length(
CAN_MODULE_ID index
);
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Description
This function identifies whether the PhaseSegment2Length feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_PhaseSegment2LengthSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PhaseSegment2Length feature is supported on the device
• false = The PhaseSegment2Length feature is not supported on the device
Remarks
None.
5.6.4.5.12.32 PLIB_CAN_ExistsPhaseSegment2LengthFreelyProgrammable Function
C
bool PLIB_CAN_ExistsPhaseSegment2LengthFreelyProgrammable(
CAN_MODULE_ID index
);
Description
This function identifies whether the PhaseSegment2LengthFreelyProgrammable feature is available on the CAN module. When
this function returns true, these functions are supported on the device:
• PLIB_CAN_PhaseSegment2LengthFreelyProgrammableEnable
• PLIB_CAN_PhaseSegment2LengthFreelyProgrammableDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PhaseSegment2LengthFreelyProgrammable feature is supported on the device
• false = The PhaseSegment2LengthFreelyProgrammable feature is not supported on the device
Remarks
None.
5.6.4.5.12.33 PLIB_CAN_ExistsPropagationTimeSegment Function
C
bool PLIB_CAN_ExistsPropagationTimeSegment(
CAN_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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);
Description
This function identifies whether the PropagationTimeSegment feature is available on the CAN module. When this function
returns true, this function is supported on the device:
• PLIB_CAN_PropagationTimeSegmentSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The PropagationTimeSegment feature is supported on the device
• false = The PropagationTimeSegment feature is not supported on the device
Remarks
None.
5.6.4.5.12.34 PLIB_CAN_ExistsReceiveBufferClear Function
C
bool PLIB_CAN_ExistsReceiveBufferClear(
CAN_MODULE_ID index
);
Description
This function identifies whether the ReceiveBufferClear feature is available on the CAN module. When this function returns true,
this function is supported on the device:
• PLIB_CAN_ReceiveBufferClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ReceiveBufferClear feature is supported on the device
• false = The ReceiveBufferClear feature is not supported on the device
Remarks
None.
5.6.4.5.12.35 PLIB_CAN_ExistsReceiveBufferIsEmpty Function
C
bool PLIB_CAN_ExistsReceiveBufferIsEmpty(
CAN_MODULE_ID index
);
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Description
This function identifies whether the ReceiveBufferIsEmpty feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_ReceiveBufferIsEmpty
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ReceiveBufferIsEmpty feature is supported on the device
• false = The ReceiveBufferIsEmpty feature is not supported on the device
Remarks
None.
5.6.4.5.12.36 PLIB_CAN_ExistsReceivedMessageGet Function
C
bool PLIB_CAN_ExistsReceivedMessageGet(
CAN_MODULE_ID index
);
Description
This function identifies whether the ReceivedMessageGet feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_ReceivedMessageGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ReceivedMessageGet feature is supported on the device
• false = The ReceivedMessageGet feature is not supported on the device
Remarks
None.
5.6.4.5.12.37 PLIB_CAN_ExistsReceiveErrorCount Function
C
bool PLIB_CAN_ExistsReceiveErrorCount(
CAN_MODULE_ID index
);
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Description
This function identifies whether the ReceiveErrorCount feature is available on the CAN module. When this function returns true,
this function is supported on the device:
• PLIB_CAN_ReceiveErrorCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ReceiveErrorCount feature is supported on the device
• false = The ReceiveErrorCount feature is not supported on the device
Remarks
None.
5.6.4.5.12.38 PLIB_CAN_ExistsReceiveModeSelect Function
C
bool PLIB_CAN_ExistsReceiveModeSelect(
CAN_MODULE_ID index
);
Description
This function identifies whether the ReceiveModeSelect feature is available on the CAN module. When this function returns true,
these functions are supported on the device:
• PLIB_CAN_ReceiveModeSelect
• PLIB_CAN_ReceiveModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ReceiveModeSelect feature is supported on the device
• false = The ReceiveModeSelect feature is not supported on the device
Remarks
None.
5.6.4.5.12.39 PLIB_CAN_ExistsRemoteTransmitReq Function
C
bool PLIB_CAN_ExistsRemoteTransmitReq(
CAN_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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);
Description
This function identifies whether the RemoteTransmitReq feature is available on the CAN module. When this function returns true,
this function is supported on the device:
• PLIB_CAN_RemoteTransmitReqIsReceived
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The RemoteTransmitReq feature is supported on the device
• false = The RemoteTransmitReq feature is not supported on the device
Remarks
None.
5.6.4.5.12.40 PLIB_CAN_ExistsRxFIFOFourLeftNotify Function
C
bool PLIB_CAN_ExistsRxFIFOFourLeftNotify(
CAN_MODULE_ID index
);
Description
This function identifies whether the RxFIFOFourLeftNotify feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_RxFIFOFourLeftNotify
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The RxFIFOFourLeftNotify feature is supported on the device
• false = The RxFIFOFourLeftNotify feature is not supported on the device
Remarks
None.
5.6.4.5.12.41 PLIB_CAN_ExistsRxFIFOOneLeftNotify Function
C
bool PLIB_CAN_ExistsRxFIFOOneLeftNotify(
CAN_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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Description
This function identifies whether the RxFIFOOneLeftNotify feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_RxFIFOOneLeftNotify
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The RxFIFOOneLeftNotify feature is supported on the device
• false = The RxFIFOOneLeftNotify feature is not supported on the device
Remarks
None.
5.6.4.5.12.42 PLIB_CAN_ExistsStopInIdle Function
C
bool PLIB_CAN_ExistsStopInIdle(
CAN_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the CAN module. When this function returns true, these
functions are supported on the device:
• PLIB_CAN_StopInIdleEnable
• PLIB_CAN_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The StopInIdle feature is supported on the device
• false = The StopInIdle feature is not supported on the device
Remarks
None.
5.6.4.5.12.43 PLIB_CAN_ExistsSyncJumpWidthSet Function
C
bool PLIB_CAN_ExistsSyncJumpWidthSet(
CAN_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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);
Description
This function identifies whether the SyncJumpWidth feature is available on the CAN module. When this function returns true, this
function is supported on the device:
• PLIB_CAN_SyncJumpWidthSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The SyncJumpWidth feature is supported on the device
• false = The SyncJumpWidth feature is not supported on the device
Remarks
None.
5.6.4.5.12.44 PLIB_CAN_ExistsTimeStampEnable Function
C
bool PLIB_CAN_ExistsTimeStampEnable(
CAN_MODULE_ID index
);
Description
This function identifies whether the TimeStampEnable feature is available on the CAN module. When this function returns true,
these functions are supported on the device:
• PLIB_CAN_TimeStampEnable
• PLIB_CAN_TimeStampDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The TimeStampEnable feature is supported on the device
• false = The TimeStampEnable feature is not supported on the device
Remarks
None.
5.6.4.5.12.45 PLIB_CAN_ExistsTimeStampPrescalar Function
C
bool PLIB_CAN_ExistsTimeStampPrescalar(
5.6 Peripheral Library Help MPLAB Harmony Help CAN Peripheral Library
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CAN_MODULE_ID index
);
Description
This function identifies whether the TimeStampPrescalar feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_TimeStampPrescalarSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The TimeStampPrescalar feature is supported on the device
• false = The TimeStampPrescalar feature is not supported on the device
Remarks
None.
5.6.4.5.12.46 PLIB_CAN_ExistsTimeStampValue Function
C
bool PLIB_CAN_ExistsTimeStampValue(
CAN_MODULE_ID index
);
Description
This function identifies whether the TimeStampValue feature is available on the CAN module. When this function returns true,
these functions are supported on the device:
• PLIB_CAN_TimeStampValueSet
• PLIB_CAN_TimeStampValueGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The TimeStampValue feature is supported on the device
• false = The TimeStampValue feature is not supported on the device
Remarks
None.
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5.6.4.5.12.47 PLIB_CAN_ExistsTransmissionIsAborted Function
C
bool PLIB_CAN_ExistsTransmissionIsAborted(
CAN_MODULE_ID index
);
Description
This function identifies whether the TransmissionAbortStatus feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_TransmissionIsAborted
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The TransmissionAbortStatus feature is supported on the device
• false = The TransmissionAbortStatus feature is not supported on the device
Remarks
None.
5.6.4.5.12.48 PLIB_CAN_ExistsTransmitBufferGet Function
C
bool PLIB_CAN_ExistsTransmitBufferGet(
CAN_MODULE_ID index
);
Description
This function identifies whether the TransmitBufferGet feature is available on the CAN module. When this function returns true,
this function is supported on the device:
• PLIB_CAN_TransmitBufferGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The TransmitBufferGet feature is supported on the device
• false = The TransmitBufferGet feature is not supported on the device
Remarks
None.
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5.6.4.5.12.49 PLIB_CAN_ExistsTransmitChannelFlush Function
C
bool PLIB_CAN_ExistsTransmitChannelFlush(
CAN_MODULE_ID index
);
Description
This function identifies whether the TransmitChannelFlush feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_TransmitChannelFlush
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The TransmitChannelFlush feature is supported on the device
• false = The TransmitChannelFlush feature is not supported on the device
Remarks
None.
5.6.4.5.12.50 PLIB_CAN_ExistsTransmitChannelStatus Function
C
bool PLIB_CAN_ExistsTransmitChannelStatus(
CAN_MODULE_ID index
);
Description
This function identifies whether the TransmitChannelStatus feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_TransmitChannelStatusGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The TransmitChannelStatus feature is supported on the device
• false = The TransmitChannelStatus feature is not supported on the device
Remarks
None.
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5.6.4.5.12.51 PLIB_CAN_ExistsTransmitErrorCountGet Function
C
bool PLIB_CAN_ExistsTransmitErrorCountGet(
CAN_MODULE_ID index
);
Description
This function identifies whether the TransmitErrorCountGet feature is available on the CAN module. When this function returns
true, this function is supported on the device:
• PLIB_CAN_TransmitErrorCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The TransmitErrorCountGet feature is supported on the device
• false = The TransmitErrorCountGet feature is not supported on the device
Remarks
None.
5.6.4.6 Files
Files
Name Description
plib_can.h This file contains the interface definition for the CAN Peripheral Library.
Description
5.6.4.6.1 plib_can.h
CAN Peripheral Library Interface Header
This library provides a low-level abstraction of the Controller Area Network (CAN) module on Microchip microcontrollers with a
convenient C language interface. It can be used to simplify low-level access to the module without the necessity of interacting
directly with the module's registers, thus hiding differences between one microcontroller variant and another.
Functions
Name Description
PLIB_CAN_AllChannelEventsGet Returns a value representing the event status of
all CAN channels.
PLIB_CAN_AllChannelOverflowStatusGet Returns a value representing the receive
overflow event status of all CAN channels.
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PLIB_CAN_BusActivityWakeupDisable Disables the wake-up on bus activity receive line
filter.
PLIB_CAN_BusActivityWakeupEnable Enables the wake-up on bus activity receive line
filter.
PLIB_CAN_BusLine3TimesSamplingDisable Disables the bus line three times sampling.
PLIB_CAN_BusLine3TimesSamplingEnable Enables the bus line three times sampling.
PLIB_CAN_ChannelEventClear Clears CAN channel events.
PLIB_CAN_ChannelEventDisable Enables channel level events.
PLIB_CAN_ChannelEventEnable Enables channel level events.
PLIB_CAN_ChannelEventGet Returns a value representing the event status of
a CAN channel.
PLIB_CAN_ChannelForReceiveSet Configures a CAN channel for receive operation.
PLIB_CAN_ChannelForTransmitSet Configures a CAN channel for transmission.
PLIB_CAN_ChannelReset Resets a CAN channel.
PLIB_CAN_ChannelResetIsComplete Returns 'true' if the specified channel reset is
complete.
PLIB_CAN_ChannelUpdate Updates the CAN Channel internal pointers.
PLIB_CAN_DeviceNetConfigure Configures the CAN module DeviceNet(TM) filter
feature.
PLIB_CAN_Disable Disables the specified CAN module.
PLIB_CAN_Enable Enables the specified CAN module.
PLIB_CAN_ErrorStateGet Returns the CAN error status word.
PLIB_CAN_ExistsActiveStatus Identifies whether the ActiveStatus feature exists
on the CAN module.
PLIB_CAN_ExistsAllChannelEvents Identifies whether the AllChannelEvents feature
exists on the CAN module.
PLIB_CAN_ExistsAllChannelOverflow Identifies whether the AllChannelOverflow
feature exists on the CAN module.
PLIB_CAN_ExistsBusActivityWakeup Identifies whether the BusActivityWakeup feature
exists on the CAN module.
PLIB_CAN_ExistsBusLine3TimesSampling Identifies whether the BusLine3TimesSampling
feature exists on the CAN module.
PLIB_CAN_ExistsChannelEvent Identifies whether the ChannelEventGet feature
exists on the CAN module.
PLIB_CAN_ExistsChannelEventEnable Identifies whether the ChannelEventEnable
feature exists on the CAN module.
PLIB_CAN_ExistsChannelForReceiveSet Identifies whether the ChannelForReceiveSet
feature exists on the CAN module.
PLIB_CAN_ExistsChannelForTransmitSet Identifies whether the ChannelForTransmitSet
feature exists on the CAN module.
PLIB_CAN_ExistsChannelReset Identifies whether the ChannelReset feature
exists on the CAN module.
PLIB_CAN_ExistsChannelUpdate Identifies whether the ChannelUpdate feature
exists on the CAN module.
PLIB_CAN_ExistsDeviceNet Identifies whether the DeviceNet feature exists
on the CAN module.
PLIB_CAN_ExistsEnableControl Identifies whether the EnableControl feature
exists on the CAN module.
PLIB_CAN_ExistsErrorState Identifies whether the ErrorStateGet feature
exists on the CAN module.
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PLIB_CAN_ExistsFilterConfigure Identifies whether the FilterConfigure feature
exists on the CAN module.
PLIB_CAN_ExistsFilterEnable Identifies whether the FilterEnable feature exists
on the CAN module.
PLIB_CAN_ExistsFilterMaskConfigure Identifies whether the FilterMaskConfigure
feature exists on the CAN module.
PLIB_CAN_ExistsFilterToChannelLink Identifies whether the FilterToChannelLink
feature exists on the CAN module.
PLIB_CAN_ExistsFunctionalMode Identifies whether the FunctionalModeSelect
feature exists on the CAN module.
PLIB_CAN_ExistsLatestFilterMatchGet Identifies whether the LatestFilterMatchGet
feature exists on the CAN module.
PLIB_CAN_ExistsMemoryBufferAssign Identifies whether the MemoryBufferAssign
feature exists on the CAN module.
PLIB_CAN_ExistsMessageIsReceived Identifies whether the MessageIsReceived
feature exists on the CAN module.
PLIB_CAN_ExistsModuleEventClear Identifies whether the ModuleEvents feature
exists on the CAN module.
PLIB_CAN_ExistsModuleEventEnable Identifies whether the ModuleEventEnable
feature exists on the CAN module.
PLIB_CAN_ExistsModuleInfo Identifies whether the ModuleInformation feature
exists on the CAN module.
PLIB_CAN_ExistsOperationModeRead Identifies whether the OperationModeRead
feature exists on the CAN module.
PLIB_CAN_ExistsOperationModeWrite Identifies whether the OperationModeSet feature
exists on the CAN module.
PLIB_CAN_ExistsPendingEventsGet Identifies whether the PendingEventsGet feature
exists on the CAN module.
PLIB_CAN_ExistsPendingTransmissionsAbort Identifies whether the
PendingTransmissionsAbort feature exists on the
CAN module.
PLIB_CAN_ExistsPhaseSegment1Length Identifies whether the PhaseSegment1Length
feature exists on the CAN module.
PLIB_CAN_ExistsPhaseSegment2Length Identifies whether the PhaseSegment2Length
feature exists on the CAN module.
PLIB_CAN_ExistsPhaseSegment2LengthFreelyProgrammable Identifies whether the
PhaseSegment2LengthFreelyProgrammable
feature exists on the CAN module.
PLIB_CAN_ExistsPropagationTimeSegment Identifies whether the PropagationTimeSegment
feature exists on the CAN module.
PLIB_CAN_ExistsReceiveBufferClear Identifies whether the ReceiveBufferClear feature
exists on the CAN module.
PLIB_CAN_ExistsReceiveBufferIsEmpty Identifies whether the ReceiveBufferIsEmpty
feature exists on the CAN module.
PLIB_CAN_ExistsReceivedMessageGet Identifies whether the ReceivedMessageGet
feature exists on the CAN module.
PLIB_CAN_ExistsReceiveErrorCount Identifies whether the ReceiveErrorCount feature
exists on the CAN module.
PLIB_CAN_ExistsReceiveModeSelect Identifies whether the ReceiveModeSelect
feature exists on the CAN module.
PLIB_CAN_ExistsRemoteTransmitReq Identifies whether the RemoteTransmitReq
feature exists on the CAN module.
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PLIB_CAN_ExistsRxFIFOFourLeftNotify Identifies whether the RxFIFOFourLeftNotify
feature exists on the CAN module.
PLIB_CAN_ExistsRxFIFOOneLeftNotify Identifies whether the RxFIFOOneLeftNotify
feature exists on the CAN module.
PLIB_CAN_ExistsStopInIdle Identifies whether the StopInIdle feature exists on
the CAN module.
PLIB_CAN_ExistsSyncJumpWidthSet Identifies whether the SyncJumpWidth feature
exists on the CAN module.
PLIB_CAN_ExistsTimeStampEnable Identifies whether the TimeStampEnable feature
exists on the CAN module
PLIB_CAN_ExistsTimeStampPrescalar Identifies whether the TimeStampPrescalar
feature exists on the CAN module.
PLIB_CAN_ExistsTimeStampValue Identifies whether the TimeStampValue feature
exists on the CAN module.
PLIB_CAN_ExistsTransmissionIsAborted Identifies whether the TransmissionAbortStatus
feature exists on the CAN module.
PLIB_CAN_ExistsTransmitBufferGet Identifies whether the TransmitBufferGet feature
exists on the CAN module.
PLIB_CAN_ExistsTransmitChannelFlush Identifies whether the TransmitChannelFlush
feature exists on the CAN module.
PLIB_CAN_ExistsTransmitChannelStatus Identifies whether the TransmitChannelStatus
feature exists on the CAN module.
PLIB_CAN_ExistsTransmitErrorCountGet Identifies whether the TransmitErrorCountGet
feature exists on the CAN module.
PLIB_CAN_FilterConfigure Configures a CAN message acceptance filter.
PLIB_CAN_FilterDisable Disables a CAN message acceptance filter.
PLIB_CAN_FilterEnable Enables a CAN message acceptance filter.
PLIB_CAN_FilterIsDisabled Returns 'true' if the specified filter is disabled.
PLIB_CAN_FilterMaskConfigure Configures a CAN filter mask.
PLIB_CAN_FilterToChannelLink Links a filter to a channel.
PLIB_CAN_FunctionalModeGet Obtains the functional mode of the CAN module.
PLIB_CAN_FunctionalModeSelect Selects the functional mode of the CAN module.
PLIB_CAN_IsActive Returns 'true' if the CAN module is active.
PLIB_CAN_LatestFilterMatchGet Returns the index of the filter that accepted the
latest message.
PLIB_CAN_MemoryBufferAssign Assigns buffer memory to the CAN module.
PLIB_CAN_MessageIsReceived Returns whether a message was received and
the receive buffer is not empty.
PLIB_CAN_ModuleEventClear Clears the CAN module level events.
PLIB_CAN_ModuleEventDisable Disables the module level events.
PLIB_CAN_ModuleEventEnable Enables the module level events.
PLIB_CAN_ModuleEventGet Returns the status of the CAN module events.
PLIB_CAN_OperationModeGet Obtains the current CAN operating mode.
PLIB_CAN_OperationModeSelect Sets the CAN operating mode.
PLIB_CAN_PendingEventsGet Returns a value representing the highest priority
active event in the module.
PLIB_CAN_PendingTransmissionsAbort Aborts any pending transmit operations.
PLIB_CAN_PhaseSegment1LengthSet Selects the CAN phase buffer segment1 length.
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PLIB_CAN_PhaseSegment2LengthFreelyProgrammableDisable Disables the CAN phase buffer segment2 length
freely programmable mode.
PLIB_CAN_PhaseSegment2LengthFreelyProgrammableEnable Makes the CAN phase buffer segment2 length
freely programmable.
PLIB_CAN_PhaseSegment2LengthSet Selects the CAN phase buffer segment2 length.
PLIB_CAN_PropagationTimeSegmentSet Selects the propagation time segment.
PLIB_CAN_ReceiveBufferClear Clears the received message flag.
PLIB_CAN_ReceiveBufferIsEmpty Returns whether the receive buffer of the
specified channel is empty.
PLIB_CAN_ReceivedMessageGet Returns a pointer to a message to be read from
the CAN channel.
PLIB_CAN_ReceiveErrorCountGet Returns the CAN receive error count.
PLIB_CAN_ReceiveModeGet Obtains the receive mode of the CAN module.
PLIB_CAN_ReceiveModeSelect Selects the receive mode of the CAN module.
PLIB_CAN_RemoteTransmitReqIsReceived Returns whether the message received is a
remote transmit request.
PLIB_CAN_RxFIFOFourLeftNotify Configures the module to generate an interrupt
when the FIFO has four receive buffers left.
PLIB_CAN_RxFIFOOneLeftNotify Configures the module to generate an interrupt
when the FIFO has only one receive buffer left.
PLIB_CAN_StopInIdleDisable Disables the Stop in Idle feature.
PLIB_CAN_StopInIdleEnable Enables the CAN module to stop when the
processor enters Idle mode.
PLIB_CAN_SyncJumpWidthSet Selects the synchronization jump width.
PLIB_CAN_TimeStampDisable Disables the time stamp feature for the CAN
module.
PLIB_CAN_TimeStampEnable Enables the time stamp feature for the CAN
module.
PLIB_CAN_TimeStampPrescalarSet Sets the CAN receive message time stamp timer
prescalar.
PLIB_CAN_TimeStampValueGet Returns the current value of the CAN receive
message time stamp timer value.
PLIB_CAN_TimeStampValueSet Sets the CAN receive message time stamp timer
value.
PLIB_CAN_TotalChannelsGet Returns the total number of CAN channels per
CAN module.
PLIB_CAN_TotalFiltersGet Returns the total number of CAN Filters per CAN
module.
PLIB_CAN_TotalMasksGet Returns the total number of CAN masks per CAN
module.
PLIB_CAN_TransmissionIsAborted Returns 'true' if the transmit abort operation is
complete.
PLIB_CAN_TransmitBufferGet Returns a pointer to an empty transmit buffer.
PLIB_CAN_TransmitChannelFlush Causes all messages in the specified transmit
channel to be transmitted.
PLIB_CAN_TransmitChannelStatusGet Returns the condition of the transmit channel.
PLIB_CAN_TransmitErrorCountGet Returns the CAN transmit error count
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Macros
Name Description
CAN_RX_DATA_ONLY_SIZE_BYTES Used as the size of the CAN data-only receive message buffer in bytes.
CAN_TX_RX_MESSAGE_SIZE_BYTES Used as the array size of the CAN transmit and full receive message
buffer.
Structures
Name Description
CAN_MSG_EID Defines the structure of the EID word section of the transmit and receive message.
CAN_RX_MSG_SID Defines the structure of the SID word section of the receive message.
CAN_TX_MSG_SID Defines the structure of the SID word section of the transmit message.
Unions
Name Description
CAN_RX_MSG_BUFFER Defines the structure of the CAN receive message buffer
CAN_TX_MSG_BUFFER Defines the structure of the CAN transmit message buffer.
File Name
plib_can.h
Company
Microchip Technology Inc.
5.6.5 Comparator Peripheral Library
5.6.5.1 Introduction
Comparator Peripheral Library
for
Microchip Microcontrollers
The Comparator module is comprised of several identical analog comparator blocks, each complete with its own supporting input
selectors and output logic. Each Comparator can be configured in a variety of ways, independent of the other comparators. The
input voltage to the module can be either fed externally or it can be configured to use the internal voltage.
Description
This library provides a low-level abstraction of the Comparator module on Microchip microcontrollers with a convenient C
language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the
module's registers, thereby abstracting hardware differences from one microcontroller variant to another facilitating future
migration.
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5.6.5.2 Release Notes
MPLAB Harmony Version: v0.70b Comparator Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.5.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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.
5.6.5.4 Using the Library
This topic describes the basic architecture of the Comparator Peripheral Library and provides information and examples on how
to use it.
Description
Using the Libary
Interface Header File: plib_cmp.h
The interface to the Comparator Peripheral Library is defined in the "plib_cmp.h" header file, which is included by the
"peripheral.h" peripheral library header file. Any C language source (.c) file that uses the Comparator Peripheral Library must
include "peripheral.h".
Library File:
The Comparator Peripheral Library is part of the processor-specific peripheral library installed with the compiler. This library is
automatically available (in the default search path) for any project built using the Microchip compilers.
Peripheral Module IDs
Peripheral libraries are indexed to allow a single library to control any number of instances of a peripheral in a single
microcontroller. The first parameter to each operation in a peripheral library is the module instance ID. The module instance ID is
defined by an enumeration that is defined in the processor-specific header files (included by the library's interface header). For
the Comparator Peripheral Library, the module instance IDs are defined by the Comparator module enumeration.
5.6.5.4.1 Hardware Abstraction Model
This library provides a low-level abstraction of the Comparator (CMP) module on Microchip PIC microcontrollers with a
convenient C language interface. This topic describes how that abstraction is modeled in software and introduces the library's
interface.
Description
Hardware Abstraction Model Diagram
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Hardware Abstraction Model Description
The Comparator Peripheral Library provides interface routines to interact with the blocks shown in the diagram above.
The Comparator VIN+ and VIN- block selects the Comparator non-inverting and inverting inputs, which can be either external or
internal inputs.
The Comparator module block compares the voltage level on the inputs and produce an output. If the input VIN+ > VIN-, the
output will be high. The output will be low when VIN+ < VIN-.
The Comparator Output Polarity block selects the Comparator output polarity.
The Comparator Output Control block enables/disables the Comparator output pin.
The Comparator Interrupt Logic Control block decide the comparator interrupt generation.The interrupt can happen at
Low-to-high, High-to-Low, and for both transitions of the Comparator output.
5.6.5.4.2 Library Usage Model
The set of interface routines for the CMP Peripheral Library are:
Library Interface
Section
Description
5.6.5.4.3 How the Library Works
The following processes are involved while using a Comparator module:
• Initialization
• Configuring the Comparator interrupt (optional)
• Power-saving modes
• Turning on the Comparator module
Name Description
Initialization Initialize the comparator module.
Configuring the Comparator Interrupts Enable the Comparator interrupt (optional)
Power-Saving Modes Enable the Comparator power-saving modes (optional)
5.6.5.4.3.1 Initialization
This section describes Comparator module initialization.
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Description
The following steps are involved while using a Comparator module.
# Description Function Associated
1 Select the Comparator inverting input. PLIB_CMP_InvertingInputChannelSelect
2 Select the Comparator non-inverting input. PLIB_CMP_NonInvertingInputChannelSelect
3 Select the Comparator output polarity. PLIB_CMP_InvertedOutputSelect
PLIB_CMP_NonInvertedOutputSelect
4 Select the Comparator output pin. PLIB_CMP_OutputEnable
PLIB_CMP_OutputDisable
5 Turn on the Comparator module. PLIB_CMP_Enable
Example
#define MY_CMP_ID CMP_ID_1
//Select the comparator inverting input
PLIB_CMP_InvertingInputChannelSelect(MY_CMP_INSTANCE,CMP_INVERTING_INPUT_CHANNEL_B);
//Select the comparator non-inverting input
PLIB_CMP_NonInvertingInputChannelSelect(MY_CMP_INSTANCE,CMP_NON_INVERTING_INPUT_A);
//Select the comparator output polarity
PLIB_CMP_NonInvertedOutputSelect(MY_CMP_INSTANCE);
//Enable the comparator output pin
PLIB_CMP_OutputEnable(MY_CMP_INSTANCE);
//Turn on the comparator module
PLIB_CMP_Enable(MY_CMP_INSTANCE);
5.6.5.4.3.2 Configuring the Comparator Interrupts
This section describes the configuration of Comparator module interrupts.
Description
The following steps are involved while configuring a Comparator interrupt.
The comparator interrupt can happen for three events. The user must configure the event-detection logic to report changes to
the output state of the Comparator, which can in turn be used for event or interrupt generation. The options include event
generation on rising state changes (low-to-high), falling state changes (high-to-low), and all state changes. When a configured
event occurs, it is flagged by the event detection flag.The user must clear this flag for the next interrupt generation.
# Description Function Associated
1 Comparator event select. PLIB_CMP_InterruptEventSelect
2 Comparator event flag read/clear PLIB_CMP_EventHasOccurred
PLIB_CMP_EventStatusClear
Example
#define MY_CMP_ID CMP_ID_1
//This code expects the comparator interrupt
//enabled in the interrupt module
//Select the comparator interrupt event
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PLIB_CMP_InterruptEventSelect(MY_CMP_INSTANCE, CMP_LOW_TO_HIGH);
//This part of the code should be in ISR
if(PLIB_CMP_EventHasOccurred(CMP_ID_1))
{
//Do some operations
\
//Clear the event flag
PLIB_CMP_EventStatusClear(CMP_ID_1);
}
//Clear the interrupt flag in the interrupt module
Note: Not all functionality is available on all devices. Please refer to the specific device data sheet for availability.
5.6.5.4.3.3 Power-Saving Modes
This section provides information on the Power-Saving modes for the Comparator module.
Description
Operation in Sleep mode: If the Comparator interrupt is enabled, the device will wake up from Sleep mode on the Comparator
interrupt. If the Comparator interrupt is disabled,the comparator will work, but it will not wake up the device from sleep.
Operation in Idle mode: The functions PLIB_CMP_StopInIdleModeEnable and PLIB_CMP_StopInIdleModeDisable determine if
the Comparator module stops or continues operation in Idle mode. If the function PLIB_CMP_StopInIdleModeDisable is used,
the module will continue operation in the Idle mode. If the Comparator interrupt is enabled, the device will wake up from Idle
mode on the Comparator interrupt. If the function PLIB_CMP_StopInIdleModeEnable is used, the module will work in Idle mode
but the interrupt will not generate if it is enabled.
# Decscription Function Associated
1 Enable Comparator Stop in Idle mode. PLIB_CMP_StopInIdleModeEnable
2 Disable Comparator Stop in Idle mode. PLIB_CMP_StopInIdleModeDisable
Example
//Select comparator stop in idle mode
PLIB_CMP_StopInIdleModeEnable(MY_CMP_INSTANCE);
Note: Not all functionality is available on all devices. Please refer to the specific device data sheet for availability.
5.6.5.5 Library Interface
Data Types and Constants
Name Description
CMP_CLOCK_DIVIDE Defines CMP Filter Clock Divide
CMP_CVREF_BANDGAP_SELECT Lists the bandgap selection options.
CMP_CVREF_REFERENCE_SELECT Lists the reference selection options.
CMP_CVREF_VALUE Lists the voltage reference value selection options.
CMP_CVREF_VOLTAGE_SOURCE Lists the Voltage source options.
CMP_FILTER_CLOCK Defines CMP filter input clock
CMP_INTERRUPT_EVENT Defines CMP interrupt events.
CMP_INVERTING_INPUT Defines the list of CMP inverting Input
CMP_MASK_A Defines CMP Mask A Input.
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CMP_MASK_B Defines CMP Mask B Input.
CMP_MASK_C Defines CMP Mask C Input.
CMP_MODULE_ID Identifies the CMP modules supported
CMP_NON_INVERTING_INPUT Defines the list of CMP non inverting Input
CMP_SPEED_POWER Defines CMP Speed/Power
Comparator AND Gate Configuration Functions
Name Description
PLIB_CMP_AndGateAInputDisable A input disabled as input to the AND gate
PLIB_CMP_AndGateAInputEnable A input enabled as input to the AND gate.
PLIB_CMP_AndGateBInputDisable B input disabled as input to the AND gate.
PLIB_CMP_AndGateBInputEnable B input enabled as input to the AND gate.
PLIB_CMP_AndGateCInputEnable C input enabled as input to the AND gate.
PLIB_CMP_AndGateInvertedAInputDisable Inverted A input disabled as input to the AND gate.
PLIB_CMP_AndGateInvertedAInputEnable Inverted A input enabled as input to the AND gate.
PLIB_CMP_AndGateInvertedBInputDisable Inverted B input disabled as input to the AND gate.
PLIB_CMP_AndGateInvertedBInputEnable Inverted B input enabled as input to the AND gate.
PLIB_CMP_AndGateInvertedCInputDisable Inverted C input disabled as input to the AND gate.
PLIB_CMP_AndGateInvertedCInputEnable Inverted C input enabled as input to the AND gate.
PLIB_CMP_NegativeAndGateOutputDisable Negative AND gate output disable.
PLIB_CMP_NegativeAndGateOutputEnable Negative AND gate output enable.
PLIB_CMP_PositiveAndGateOutputDisable Positive AND gate output disable.
PLIB_CMP_PositiveAndGateOutputEnable Positive AND gate output enable.
PLIB_CMP_AndGateCInputDisable C input disabled as input to the AND gate.
Comparator Feature Configuration Functions
Name Description
PLIB_CMP_Cmp1OutputHighSelect Comparator output bit is set to '1'.
PLIB_CMP_Cmp1OutputLowSelect Comparator output bit is set to '0'.
PLIB_CMP_Cmp2OutputHighSelect Comparator output bit is set to '1'.
PLIB_CMP_Cmp2OutputLowSelect Comparator output bit is set to '0'.
PLIB_CMP_HysteresisDisable Comparator hysteresis disable.
PLIB_CMP_HysteresisEnable Comparator hysteresis enable.
PLIB_CMP_OutputHighSelect Comparator output bit is set to '1'.
PLIB_CMP_OutputLowSelect Comparator output bit is set to '0'.
PLIB_CMP_OutputSynchronousWithTimer1Disable Comparator output is asynchronous.
PLIB_CMP_OutputSynchronousWithTimer1Enable Comparator Output Synchronous mode select.
PLIB_CMP_StopInIdleModeDisable Disables Stop in Idle mode.
PLIB_CMP_StopInIdleModeEnable Enables Stop in Idle mode.
Comparator Filter Clock Configuration Functions
Name Description
PLIB_CMP_FilterClockDivideSelect Comparator filter clock divide select.
PLIB_CMP_FilterDisable Comparator filter disable.
PLIB_CMP_FilterEnable Comparator filter enable.
PLIB_CMP_FilterInputClockSelect Comparator filter input clock select.
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Comparator Mask Select Configuration Functions
Name Description
PLIB_CMP_HighLevelMaskSelect High-level masking select.
PLIB_CMP_LowLevelMaskSelect Low-level masking select.
Comparator Op amp Mode Configuration Functions
Name Description
PLIB_CMP_OpAmpModeDisable Op amp operation mode disable.
PLIB_CMP_OpAmpModeEnable Op amp operation mode enable.
PLIB_CMP_OpAmpOutputDisable Op amp output disable.
PLIB_CMP_OpAmpOutputEnable Op amp output enable.
Comparator OR Gate Configuration Functions
Name Description
PLIB_CMP_OrGateAInputDisable OR gate A input disable.
PLIB_CMP_OrGateAInputEnable A input connected to OR gate.
PLIB_CMP_OrGateBInputDisable OR gate B input disable.
PLIB_CMP_OrGateBInputEnable B input connected to OR gate.
PLIB_CMP_OrGateCInputDisable OR gate C input disable.
PLIB_CMP_OrGateCInputEnable C input connected to OR gate.
PLIB_CMP_OrGateInvertedAInputDisable OR gate inverted A input disable.
PLIB_CMP_OrGateInvertedAInputEnable Inverted A input connected to OR gate.
PLIB_CMP_OrGateInvertedBInputDisable OR gate inverted B input disable.
PLIB_CMP_OrGateInvertedBInputEnable Inverted B input connected to OR gate
PLIB_CMP_OrGateInvertedCInputDisable OR gate inverted C input disable.
PLIB_CMP_OrGateInvertedCInputEnable Inverted C input connected to OR gate
Feature Existence Functions
Name Description
PLIB_CMP_ExistsCVREFBGRefVoltageRangeSelect Identifies whether the CVREFBGRefVoltageRangeSelect
feature exists on the Comparator module.
PLIB_CMP_ExistsCVREFEnableControl Identifies whether the CVREFEnableControl feature exists
on the Comparator module.
PLIB_CMP_ExistsCVREFOutputEnableControl Identifies whether the CVREFOutputEnableControl feature
exists on the Comparator module.
PLIB_CMP_ExistsCVREFRefVoltageRangeSelect Identifies whether the CVREFRefVoltageRangeSelect
feature exists on the Comparator module.
PLIB_CMP_ExistsCVREFValueSelect Identifies whether the CVREFValueSelect feature exists on
the Comparator module.
PLIB_CMP_ExistsCVREFVoltageRangeSelect Identifies whether the CVREFVoltageRangeSelect feature
exists on the Comparator module.
PLIB_CMP_ExistsCVREFWideRangeControl Identifies whether the CVREFWideRangeControl feature
exists on the Comparator module.
PLIB_CMP_ExistsEnableControl Identifies whether the ComparatorEnableControl feature
exists on the Comparator module.
PLIB_CMP_ExistsInterruptEventSelect Identifies whether the InterruptEventSelect feature exists on
the Comparator module.
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PLIB_CMP_ExistsInvertingInputSelect Identifies whether the InvertingInputSelect feature exists on
the Comparator module.
PLIB_CMP_ExistsInvertOutputControl Identifies whether the InvertOutputSelectControl feature
exists on the Comparator module.
PLIB_CMP_ExistsNonInvertingInputSelect Identifies whether the NonInvertingInputSelect feature exists
on the Comparator module.
PLIB_CMP_ExistsOutputEnableControl Identifies whether the ComparatorOutputEnableControl
feature exists on the Comparator module.
PLIB_CMP_ExistsOutputLevelControl Identifies whether the OutputLevelSelectControl feature
exists on the Comparator module.
PLIB_CMP_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the
Comparator module.
General Configuration Functions
Name Description
PLIB_CMP_CVREF_BandGapReferenceSourceSelect Selects the band gap reference voltage source.
PLIB_CMP_CVREF_Enable Enables the voltage reference of the Comparator module.
PLIB_CMP_CVREF_Output2Disable Disables the Vsource/2 voltage output.
PLIB_CMP_CVREF_Output2Enable Enables the Vsource/2 voltage output.
PLIB_CMP_CVREF_OutputDisable Disables the output voltage.
PLIB_CMP_CVREF_OutputEnable Enables the voltage output.
PLIB_CMP_CVREF_ReferenceVoltageSelect Selects the voltage reference value.
PLIB_CMP_CVREF_SourceNegativeInputSelect Configures the Comparator module to use the selected
input as a negative reference.
PLIB_CMP_CVREF_SourceVoltageSelect Connects the Comparator module to the selected voltage
source.
PLIB_CMP_CVREF_ValueGet Returns the voltage setting value.
PLIB_CMP_CVREF_ValueSelect Selects the voltage reference value.
PLIB_CMP_CVREF_WideRangeDisable Disables the wide range.
PLIB_CMP_CVREF_WideRangeEnable Enables the wide range.
PLIB_CMP_CVREF_WideRangeIsEnabled Returns whether the wide range is selected for the
reference voltage.
PLIB_CMP_Disable Disables the Comparator module.
PLIB_CMP_Enable Enables the Comparator module.
PLIB_CMP_EventHasOccurred Comparator event status.
PLIB_CMP_EventStatusClear Comparator event clear.
PLIB_CMP_InterruptEventSelect Comparator interrupt event select.
PLIB_CMP_InvertedOutputSelect Comparator output is inverted.
PLIB_CMP_InvertingInputChannelSelect Comparator inverting input channel select.
PLIB_CMP_NonInvertedOutputSelect Comparator output is non-inverted.
PLIB_CMP_NonInvertingInputChannelSelect Comparator input channel select.
PLIB_CMP_OutputDisable Disables the Comparator output.
PLIB_CMP_OutputEnable Enables the Comparator output.
PLIB_CMP_OutputStatusGet Comparator output status.
PLIB_CMP_CVREF_Disable Disables the voltage reference of the Comparator module.
Description
This section lists and describes the functions, data types, and constants available in the Comparator Peripheral Library.
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5.6.5.5.1 General Configuration Functions
5.6.5.5.1.1 PLIB_CMP_CVREF_BandGapReferenceSourceSelect Function
C
void PLIB_CMP_CVREF_BandGapReferenceSourceSelect(
CMP_MODULE_ID index,
CMP_CVREF_BANDGAP_SELECT select
);
Description
This function selects the band gap reference voltage source from the available options from CMP_CVREF_BANDGAP_SELECT.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
select Select a band gap reference source from CMP_CVREF_BANDGAP_SELECT
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFBGRefVoltageRangeSelect in your application to determine whether this feature is available.
Example
PLIB_CMP_CVREF_BandGapReferenceSourceSelect ( CMP_CVREF_ID_1, PLIB_CMP_CVREF_BANDGAP_0_6V );
5.6.5.5.1.2 PLIB_CMP_CVREF_Enable Function
C
void PLIB_CMP_CVREF_Enable(
CMP_MODULE_ID index
);
Description
This function enables the voltage reference of the Comparator module.
Preconditions
The Comparator module should be appropriately configured before being enabled.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_CMP_CVREF_ExistsCVREFEnableControl in your application to determine whether this feature is available.
Example
PLIB_CMP_CVREF_Enable(CMP_CVREF_ID_1);
5.6.5.5.1.3 PLIB_CMP_CVREF_Output2Disable Function
C
void PLIB_CMP_CVREF_Output2Disable(
CMP_MODULE_ID index
);
Description
This function disables the Vsource/2 voltage output.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_CMP_CVREF_Output2Disable(CMP_CVREF_ID_1);
5.6.5.5.1.4 PLIB_CMP_CVREF_Output2Enable Function
C
void PLIB_CMP_CVREF_Output2Enable(
CMP_MODULE_ID index
);
Description
This function enables the Vsource/2 voltage output. This is independent of voltage output 1.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_CMP_CVREF_Output2Enable(CMP_CVREF_ID_1);
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5.6.5.5.1.5 PLIB_CMP_CVREF_OutputDisable Function
C
void PLIB_CMP_CVREF_OutputDisable(
CMP_MODULE_ID index
);
Description
This function disables the reference voltage output.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFOutputEnableControl in your application to determine whether this feature is available.
Example
PLIB_CMP_CVREF_VoltageOutputDisable(CMP_CVREF_ID_1);
5.6.5.5.1.6 PLIB_CMP_CVREF_OutputEnable Function
C
void PLIB_CMP_CVREF_OutputEnable(
CMP_MODULE_ID index
);
Description
This function enables the voltage output
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFOutputEnableControl in your application to determine whether this feature is available.
Example
PLIB_CMP_CVREF_OutputEnable(CMP_CVREF_ID_1);
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5.6.5.5.1.7 PLIB_CMP_CVREF_ReferenceVoltageSelect Function
C
void PLIB_CMP_CVREF_ReferenceVoltageSelect(
CMP_MODULE_ID index,
CMP_CVREF_REFERENCE_SELECT reference
);
Description
This function selects the voltage reference value. This value decides how many resistance units will be added and thus decides
the output voltage.
Preconditions
Determine the correct value that should be passed.
Parameters
Parameters Description
index Identifier for the device instance to be configured
value Select value from CMP_CVREF_VALUE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFRefVoltageRangeSelect in your application to determine whether this feature is available.
Example
PLIB_CMP_CVREF_ReferenceVoltageSelect ( CMP_CVREF_ID_1, CMP_CVREF_VALUE_13 );
5.6.5.5.1.8 PLIB_CMP_CVREF_SourceNegativeInputSelect Function
C
void PLIB_CMP_CVREF_SourceNegativeInputSelect(
CMP_MODULE_ID index,
CMP_CVREF_VOLTAGE_SOURCE_NEG_REFERENCE negInput
);
Description
This function configures the Comparator module to use the selected input as a negative reference for the voltage source.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured.
negInput Select the voltage source negative reference from
CMP_CVREF_VOLTAGE_SOURCE_NEG_REFERENCE
Returns
None.
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Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability. For such devices,
selecting the positive source will automatically select the negative input.
Example
PLIB_CMP_CVREF_SourceNegativeInputSelect (CMP_CVREF_ID_1,
CMP_CVREF_VOLTAGE_SOURCE_NEG_REF_GROUND);
5.6.5.5.1.9 PLIB_CMP_CVREF_SourceVoltageSelect Function
C
void PLIB_CMP_CVREF_SourceVoltageSelect(
CMP_MODULE_ID index,
CMP_CVREF_VOLTAGE_SOURCE source
);
Description
This function connects the Comparator module to the selected voltage source.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
source Select the voltage source from CMP_CVREF_VOLTAGE_SOURCE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFVoltageRangeSelect in your application to determine whether this feature is available.
Example
PLIB_CMP_CVREF_SourceVoltageSelect (CMP_CVREF_ID_1, CMP_CVREF_VOLTAGE_SOURCE_INTERNAL);
5.6.5.5.1.10 PLIB_CMP_CVREF_ValueGet Function
C
CMP_CVREF_VALUE PLIB_CMP_CVREF_ValueGet(
CMP_MODULE_ID index
);
Description
This function returns the configured reference voltage value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
CMP_CVREF_VALUE - Reference voltage value
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFValueSelect in your application to determine whether this feature is available.
Example
CMP_CVREF_VALUE value;
value = PLIB_CMP_CVREF_ValueGet ( CMP_CVREF_ID_1 );
5.6.5.5.1.11 PLIB_CMP_CVREF_ValueSelect Function
C
void PLIB_CMP_CVREF_ValueSelect(
CMP_MODULE_ID index,
CMP_CVREF_VALUE value
);
Description
This function selects the voltage reference value. This value decides how many resistance units will be added and therefore,
decides the output voltage.
Preconditions
Determine the correct value that should be passed.
Parameters
Parameters Description
index Identifier for the device instance to be configured
value Select value from CMP_CVREF_VALUE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFValueSelect in your application to determine whether this feature is available.
Example
PLIB_CMP_CVREF_ValueSelect ( CMP_CVREF_ID_1, CMP_CVREF_VALUE_13 );
5.6.5.5.1.12 PLIB_CMP_CVREF_WideRangeDisable Function
C
void PLIB_CMP_CVREF_WideRangeDisable(
CMP_MODULE_ID index
);
Description
This function disables the wide range for reference voltage. The range of possible voltages will become narrower, and finer
voltage options can be achieved in this case.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFWideRangeControl in your application to determine whether this feature is available.
Example
PLIB_CMP_CVREF_WideRangeDisable(CMP_CVREF_ID_1);
5.6.5.5.1.13 PLIB_CMP_CVREF_WideRangeEnable Function
C
void PLIB_CMP_CVREF_WideRangeEnable(
CMP_MODULE_ID index
);
Description
This function enables the wide range for reference voltage. The voltage range starts from zero if the wide range is selected.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFWideRangeControl in your application to determine whether this feature is available.
Example
PLIB_CMP_CVREF_WideRangeEnable(CMP_CVREF_ID_1);
5.6.5.5.1.14 PLIB_CMP_CVREF_WideRangeIsEnabled Function
C
bool PLIB_CMP_CVREF_WideRangeIsEnabled(
CMP_MODULE_ID index
);
Description
This function returns whether the wide range is enabled.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true = The wide range is enabled
• false = The wide range is not enabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFWideRangeControl in your application to determine whether this feature is available.
Example
bool range;
range = PLIB_CMP_CVREF_WideRangeIsEnabled(MY_CMP_CVREF_ID);
5.6.5.5.1.15 PLIB_CMP_Disable Function
C
void PLIB_CMP_Disable(
CMP_MODULE_ID index
);
Description
This function disables (i.e., turns OFF) the selected Comparator module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsEnableControl in your application to determine whether this feature is available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_Disable(MY_CMP_INSTANCE);
5.6.5.5.1.16 PLIB_CMP_Enable Function
C
void PLIB_CMP_Enable(
CMP_MODULE_ID index
);
Description
This function enables (i.e., turns ON) the selected Comparator module.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsEnableControl in your application to determine whether this feature is available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_Enable(MY_CMP_INSTANCE);
5.6.5.5.1.17 PLIB_CMP_EventHasOccurred Function
C
bool PLIB_CMP_EventHasOccurred(
CMP_MODULE_ID index
);
Description
This function will return the current event status of the Comparator.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true = The event flag is set
• false = The event flag is clear
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// bool cmp_event_status = PLIB_CMP_EventHasOccurred(MY_CMP_INSTANCE);
5.6.5.5.1.18 PLIB_CMP_EventStatusClear Function
C
void PLIB_CMP_EventStatusClear(
CMP_MODULE_ID index
);
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Description
This function will clear event status bit of the Comparator. Subsequent triggers and interrupts are disabled until the bit is cleared.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_EventStatusClear(MY_CMP_INSTANCE);
5.6.5.5.1.19 PLIB_CMP_InterruptEventSelect Function
C
void PLIB_CMP_InterruptEventSelect(
CMP_MODULE_ID index,
CMP_INTERRUPT_EVENT event
);
Description
This function will select when the Comparator interrupt should occur.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
event One of the possible values from CMP_INTERRUPT_EVENT
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsInterruptEventSelect in your application to determine whether this feature is available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// CMP_INTERRUPT_EVENT - CMP_LOW_TO_HIGH
PLIB_CMP_InterruptEventSelect(MY_CMP_INSTANCE, CMP_LOW_TO_HIGH);
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5.6.5.5.1.20 PLIB_CMP_InvertedOutputSelect Function
C
void PLIB_CMP_InvertedOutputSelect(
CMP_MODULE_ID index
);
Description
This function will select the inverted comparator output.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsOutputEnableControlExistsInvertOutputControl in your application to determine whether this feature is
available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_InvertedOutputSelect(MY_CMP_INSTANCE,);
5.6.5.5.1.21 PLIB_CMP_InvertingInputChannelSelect Function
C
void PLIB_CMP_InvertingInputChannelSelect(
CMP_MODULE_ID index,
CMP_INVERTING_INPUT channel
);
Description
This function will select the inverting input channels for the Comparator.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel One of the possible values from CMP_INVERTING_INPUT
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_CMP_ExistsInvertingInputSelect in your application to determine whether this feature is available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_InvertingInputChannelSelect(MY_CMP_INSTANCE,CMP_INVERTING_INPUT_CHANNEL_B);
5.6.5.5.1.22 PLIB_CMP_NonInvertedOutputSelect Function
C
void PLIB_CMP_NonInvertedOutputSelect(
CMP_MODULE_ID index
);
Description
This function will select the non-inverted comparator output.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsOutputEnableControlExistsInvertOutputControl in your application to determine whether this feature is
available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_NonInvertedOutputSelect(MY_CMP_INSTANCE,);
5.6.5.5.1.23 PLIB_CMP_NonInvertingInputChannelSelect Function
C
void PLIB_CMP_NonInvertingInputChannelSelect(
CMP_MODULE_ID index,
CMP_NON_INVERTING_INPUT input
);
Description
This function will select the non-inverting input channels for the Comparator.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel One of the possible values from CMP_NON_INVERTING_INPUT
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsNonInvertingInputSelect in your application to determine whether this feature is available.s
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_NonInvertingInputChannelSelect(MY_CMP_INSTANCE,CMP_NON_INVERTING_INPUT_A);
5.6.5.5.1.24 PLIB_CMP_OutputDisable Function
C
void PLIB_CMP_OutputDisable(
CMP_MODULE_ID index
);
Description
This function disables (i.e., turns OFF) the Comparator output.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsOutputEnableControl in your application to determine whether this feature is available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_OutputDisable(MY_CMP_INSTANCE);
5.6.5.5.1.25 PLIB_CMP_OutputEnable Function
C
void PLIB_CMP_OutputEnable(
CMP_MODULE_ID index
);
Description
This function enables (i.e., turns ON) the Comparator output.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsOutputEnableControl in your application to determine whether this feature is available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_OutputEnable(MY_CMP_INSTANCE);
5.6.5.5.1.26 PLIB_CMP_OutputStatusGet Function
C
bool PLIB_CMP_OutputStatusGet(
CMP_MODULE_ID index
);
Description
This function will return the current status of the Comparator output.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true = The status flag is set
• false = The status flag is clear
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// bool cmp_status=PLIB_CMP_OutputStatusGet(MY_CMP_INSTANCE);
5.6.5.5.1.27 PLIB_CMP_CVREF_Disable Function
C
void PLIB_CMP_CVREF_Disable(
CMP_MODULE_ID index
);
Description
This function disables the voltage reference of the Comparator module.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_CVREF_ExistsCVREFEnableControl in your application to determine whether this feature is available.
Example
PLIB_CMP_CVREF_Disable (CMP_CVREF_ID_1);
5.6.5.5.2 Comparator Feature Configuration Functions
5.6.5.5.2.1 PLIB_CMP_Cmp1OutputHighSelect Function
C
void PLIB_CMP_Cmp1OutputHighSelect(
CMP_MODULE_ID index
);
Description
This function will set the Comparator output bit to '1'.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_Cmp1OutputHighSelect(MY_CMP_INSTANCE,);
5.6.5.5.2.2 PLIB_CMP_Cmp1OutputLowSelect Function
C
void PLIB_CMP_Cmp1OutputLowSelect(
CMP_MODULE_ID index
);
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Description
This function will set the Comparator output bit to '0'.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_Cmp1OutputLowSelect(MY_CMP_INSTANCE,);
5.6.5.5.2.3 PLIB_CMP_Cmp2OutputHighSelect Function
C
void PLIB_CMP_Cmp2OutputHighSelect(
CMP_MODULE_ID index
);
Description
This function will set the Comparator output bit to '1'.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_Cmp2OutputHighSelect(MY_CMP_INSTANCE,);
5.6.5.5.2.4 PLIB_CMP_Cmp2OutputLowSelect Function
C
void PLIB_CMP_Cmp2OutputLowSelect(
CMP_MODULE_ID index
);
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Description
This function will set the Comparator output bit to '0'.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_Cmp2OutputLowSelect(MY_CMP_INSTANCE,);
5.6.5.5.2.5 PLIB_CMP_HysteresisDisable Function
C
void PLIB_CMP_HysteresisDisable(
CMP_MODULE_ID index
);
Description
This function will disable the hysteresis of the Comparator.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_HysteresisDisable(MY_CMP_INSTANCE);
5.6.5.5.2.6 PLIB_CMP_HysteresisEnable Function
C
void PLIB_CMP_HysteresisEnable(
CMP_MODULE_ID index
);
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Description
This function will enable the hysteresis of the Comparator.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_HysteresisEnable(MY_CMP_INSTANCE);
5.6.5.5.2.7 PLIB_CMP_OutputHighSelect Function
C
void PLIB_CMP_OutputHighSelect(
CMP_MODULE_ID index
);
Description
This function will set the Comparator output bit to '1'.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsOutputLevelControl in your application to determine whether this feature is available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_OutputHighSelect(MY_CMP_INSTANCE,);
5.6.5.5.2.8 PLIB_CMP_OutputLowSelect Function
C
void PLIB_CMP_OutputLowSelect(
CMP_MODULE_ID index
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);
Description
This function will set the Comparator output bit to '0'.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsOutputLevelControl in your application to determine whether this feature is available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
PLIB_CMP_OutputLowSelect(MY_CMP_INSTANCE,);
5.6.5.5.2.9 PLIB_CMP_OutputSynchronousWithTimer1Disable Function
C
void PLIB_CMP_OutputSynchronousWithTimer1Disable(
CMP_MODULE_ID index
);
Description
This function will disable the synchronized comparator output with the Timer1 clock.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OutputSynchronousWithTimer1Disable(MY_CMP_INSTANCE);
5.6.5.5.2.10 PLIB_CMP_OutputSynchronousWithTimer1Enable Function
C
void PLIB_CMP_OutputSynchronousWithTimer1Enable(
5.6 Peripheral Library Help MPLAB Harmony Help Comparator Peripheral Library
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CMP_MODULE_ID index
);
Description
This function will synchronize comparator output to the rising edge of the Timer1 clock.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OutputSynchronousWithTimer1Enable(MY_CMP_INSTANCE);
5.6.5.5.2.11 PLIB_CMP_StopInIdleModeDisable Function
C
void PLIB_CMP_StopInIdleModeDisable(
CMP_MODULE_ID index
);
Description
This function will continue operation of all enabled comparators when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsStopInIdle in your application to determine whether this feature is available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_StopInIdleModeDisable(MY_CMP_INSTANCE);
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5.6.5.5.2.12 PLIB_CMP_StopInIdleModeEnable Function
C
void PLIB_CMP_StopInIdleModeEnable(
CMP_MODULE_ID index
);
Description
This function will discontinue operation of all comparators when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_CMP_ExistsStopInIdle in your application to determine whether this feature is available.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_StopInIdleModeEnable(MY_CMP_INSTANCE);
5.6.5.5.3 Comparator AND Gate Configuration Functions
5.6.5.5.3.1 PLIB_CMP_AndGateAInputDisable Function
C
void PLIB_CMP_AndGateAInputDisable(
CMP_MODULE_ID index
);
Description
This function will disable the A input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
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Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateAInputDisable(MY_CMP_INSTANCE);
5.6.5.5.3.2 PLIB_CMP_AndGateAInputEnable Function
C
void PLIB_CMP_AndGateAInputEnable(
CMP_MODULE_ID index
);
Description
This function will select the A input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateAInputEnable(MY_CMP_INSTANCE);
5.6.5.5.3.3 PLIB_CMP_AndGateBInputDisable Function
C
void PLIB_CMP_AndGateBInputDisable(
CMP_MODULE_ID index
);
Description
This function will disable the B input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
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Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateBInputDisable(MY_CMP_INSTANCE);
5.6.5.5.3.4 PLIB_CMP_AndGateBInputEnable Function
C
void PLIB_CMP_AndGateBInputEnable(
CMP_MODULE_ID index
);
Description
This function will select the B input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateBInputEnable(MY_CMP_INSTANCE);
5.6.5.5.3.5 PLIB_CMP_AndGateCInputEnable Function
C
void PLIB_CMP_AndGateCInputEnable(
CMP_MODULE_ID index
);
Description
This function will select the C input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
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Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateCInputEnable(MY_CMP_INSTANCE);
5.6.5.5.3.6 PLIB_CMP_AndGateInvertedAInputDisable Function
C
void PLIB_CMP_AndGateInvertedAInputDisable(
CMP_MODULE_ID index
);
Description
This function will disable the inverted A input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateInvertedAInputDisable(MY_CMP_INSTANCE);
5.6.5.5.3.7 PLIB_CMP_AndGateInvertedAInputEnable Function
C
void PLIB_CMP_AndGateInvertedAInputEnable(
CMP_MODULE_ID index
);
Description
This function will enable the inverted A input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
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Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateInvertedAInputEnable(MY_CMP_INSTANCE);
5.6.5.5.3.8 PLIB_CMP_AndGateInvertedBInputDisable Function
C
void PLIB_CMP_AndGateInvertedBInputDisable(
CMP_MODULE_ID index
);
Description
This function will disable the inverted B input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateInvertedBInputDisable(MY_CMP_INSTANCE);
5.6.5.5.3.9 PLIB_CMP_AndGateInvertedBInputEnable Function
C
void PLIB_CMP_AndGateInvertedBInputEnable(
CMP_MODULE_ID index
);
Description
This function will enable the inverted B input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
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Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateInvertedBInputEnable(MY_CMP_INSTANCE);
5.6.5.5.3.10 PLIB_CMP_AndGateInvertedCInputDisable Function
C
void PLIB_CMP_AndGateInvertedCInputDisable(
CMP_MODULE_ID index
);
Description
This function will disable the inverted C input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateInvertedCInputDisable(MY_CMP_INSTANCE);
5.6.5.5.3.11 PLIB_CMP_AndGateInvertedCInputEnable Function
C
void PLIB_CMP_AndGateInvertedCInputEnable(
CMP_MODULE_ID index
);
Description
This function will enable the inverted C input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
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Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateInvertedCInputEnable(MY_CMP_INSTANCE);
5.6.5.5.3.12 PLIB_CMP_NegativeAndGateOutputDisable Function
C
void PLIB_CMP_NegativeAndGateOutputDisable(
CMP_MODULE_ID index
);
Description
This function will disable the negative AND gate output to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_NegativeAndGateOutputDisable (MY_CMP_INSTANCE);
5.6.5.5.3.13 PLIB_CMP_NegativeAndGateOutputEnable Function
C
void PLIB_CMP_NegativeAndGateOutputEnable(
CMP_MODULE_ID index
);
Description
This function will enable the negative AND gate output to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
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Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_NegativeAndGateOutputEnable(MY_CMP_INSTANCE);
5.6.5.5.3.14 PLIB_CMP_PositiveAndGateOutputDisable Function
C
void PLIB_CMP_PositiveAndGateOutputDisable(
CMP_MODULE_ID index
);
Description
This function will disable the positive AND gate output to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_PositiveAndGateOutputDisable (MY_CMP_INSTANCE);
5.6.5.5.3.15 PLIB_CMP_PositiveAndGateOutputEnable Function
C
void PLIB_CMP_PositiveAndGateOutputEnable(
CMP_MODULE_ID index
);
Description
This function will enable the positive AND gate output to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
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Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_PositiveAndGateOutputEnable(MY_CMP_INSTANCE);
5.6.5.5.3.16 PLIB_CMP_AndGateCInputDisable Function
C
void PLIB_CMP_AndGateCInputDisable(
CMP_MODULE_ID index
);
Description
This function will disable the C input as the input to the AND gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_AndGateCInputDisable(MY_CMP_INSTANCE);
5.6.5.5.4 Comparator Filter Clock Configuration Functions
5.6.5.5.4.1 PLIB_CMP_FilterClockDivideSelect Function
C
void PLIB_CMP_FilterClockDivideSelect(
CMP_MODULE_ID index,
CMP_CLOCK_DIVIDE scale
);
Description
This function will select the Comparator filter clock divide.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
scale One of the possible values from CMP_CLOCK_DIVIDE
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Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_FilterClockDivideSelect (MY_CMP_INSTANCE,CMP_FILTER_CLOCK_DIVIDE_1_2);
5.6.5.5.4.2 PLIB_CMP_FilterDisable Function
C
void PLIB_CMP_FilterDisable(
CMP_MODULE_ID index
);
Description
This function will disable the Comparator digital filter.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_FilterDisable (MY_CMP_INSTANCE);
5.6.5.5.4.3 PLIB_CMP_FilterEnable Function
C
void PLIB_CMP_FilterEnable(
CMP_MODULE_ID index
);
Description
This function will enable the Comparator digital filter.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
5.6 Peripheral Library Help MPLAB Harmony Help Comparator Peripheral Library
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Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_FilterEnable (MY_CMP_INSTANCE);
5.6.5.5.4.4 PLIB_CMP_FilterInputClockSelect Function
C
void PLIB_CMP_FilterInputClockSelect(
CMP_MODULE_ID index,
CMP_FILTER_CLOCK inputclock
);
Description
This function will select the Comparator filter input clock.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
inputclock One of the possible values from CMP_FILTER_CLOCK
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_FilterInputClockSelect (MY_CMP_INSTANCE,CMP_FILTER_CLOCK_FP);
5.6.5.5.5 Comparator Op amp Mode Configuration Functions
5.6.5.5.5.1 PLIB_CMP_OpAmpModeDisable Function
C
void PLIB_CMP_OpAmpModeDisable(
CMP_MODULE_ID index
);
Description
This function will cause the circuit to operate as a Comparator.
5.6 Peripheral Library Help MPLAB Harmony Help Comparator Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OpAmpModeDisable(MY_CMP_INSTANCE);
5.6.5.5.5.2 PLIB_CMP_OpAmpModeEnable Function
C
void PLIB_CMP_OpAmpModeEnable(
CMP_MODULE_ID index
);
Description
This function will cause the circuit to operate as an Op amp.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OpAmpModeEnable(MY_CMP_INSTANCE);
5.6.5.5.5.3 PLIB_CMP_OpAmpOutputDisable Function
C
void PLIB_CMP_OpAmpOutputDisable(
CMP_MODULE_ID index
);
Description
This function will disable the Op amp output pin.
5.6 Peripheral Library Help MPLAB Harmony Help Comparator Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OpAmpOutputDisable(MY_CMP_INSTANCE);
5.6.5.5.5.4 PLIB_CMP_OpAmpOutputEnable Function
C
void PLIB_CMP_OpAmpOutputEnable(
CMP_MODULE_ID index
);
Description
This function will enable the Op amp output pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OpAmpOutputEnable(MY_CMP_INSTANCE);
5.6.5.5.6 Comparator OR Gate Configuration Functions
5.6.5.5.6.1 PLIB_CMP_OrGateAInputDisable Function
C
void PLIB_CMP_OrGateAInputDisable(
CMP_MODULE_ID index
);
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Description
This function will disable the A input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateAInputDisable(MY_CMP_INSTANCE);
5.6.5.5.6.2 PLIB_CMP_OrGateAInputEnable Function
C
void PLIB_CMP_OrGateAInputEnable(
CMP_MODULE_ID index
);
Description
This function will select the A input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateAInputEnable(MY_CMP_INSTANCE);
5.6.5.5.6.3 PLIB_CMP_OrGateBInputDisable Function
C
void PLIB_CMP_OrGateBInputDisable(
CMP_MODULE_ID index
);
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Description
This function will disable the B input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateBInputDisable(MY_CMP_INSTANCE);
5.6.5.5.6.4 PLIB_CMP_OrGateBInputEnable Function
C
void PLIB_CMP_OrGateBInputEnable(
CMP_MODULE_ID index
);
Description
This function will select the B input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateBInputEnable(MY_CMP_INSTANCE);
5.6.5.5.6.5 PLIB_CMP_OrGateCInputDisable Function
C
void PLIB_CMP_OrGateCInputDisable(
CMP_MODULE_ID index
);
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Description
This function will disable the C input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateCInputDisable(MY_CMP_INSTANCE);
5.6.5.5.6.6 PLIB_CMP_OrGateCInputEnable Function
C
void PLIB_CMP_OrGateCInputEnable(
CMP_MODULE_ID index
);
Description
This function will select the C input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateCInputEnable(MY_CMP_INSTANCE);
5.6.5.5.6.7 PLIB_CMP_OrGateInvertedAInputDisable Function
C
void PLIB_CMP_OrGateInvertedAInputDisable(
CMP_MODULE_ID index
);
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Description
This function will disable the inverted A input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateInvertedAInputDisable (MY_CMP_INSTANCE);
5.6.5.5.6.8 PLIB_CMP_OrGateInvertedAInputEnable Function
C
void PLIB_CMP_OrGateInvertedAInputEnable(
CMP_MODULE_ID index
);
Description
This function will select the inverted A input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateInvertedAInputEnable (MY_CMP_INSTANCE);
5.6.5.5.6.9 PLIB_CMP_OrGateInvertedBInputDisable Function
C
void PLIB_CMP_OrGateInvertedBInputDisable(
CMP_MODULE_ID index
);
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Description
This function will disable the inverted B input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateInvertedBInputDisable (MY_CMP_INSTANCE);
5.6.5.5.6.10 PLIB_CMP_OrGateInvertedBInputEnable Function
C
void PLIB_CMP_OrGateInvertedBInputEnable(
CMP_MODULE_ID index
);
Description
This function will select the inverted B input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateInvertedBInputEnable (MY_CMP_INSTANCE);
5.6.5.5.6.11 PLIB_CMP_OrGateInvertedCInputDisable Function
C
void PLIB_CMP_OrGateInvertedCInputDisable(
CMP_MODULE_ID index
);
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Description
This function will disable the inverted C input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateInvertedCInputDisable (MY_CMP_INSTANCE);
5.6.5.5.6.12 PLIB_CMP_OrGateInvertedCInputEnable Function
C
void PLIB_CMP_OrGateInvertedCInputEnable(
CMP_MODULE_ID index
);
Description
This function will select the inverted C input as the input to the OR gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_OrGateInvertedCInputEnable (MY_CMP_INSTANCE);
5.6.5.5.7 Comparator Mask Select Configuration Functions
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5.6.5.5.7.1 PLIB_CMP_HighLevelMaskSelect Function
C
void PLIB_CMP_HighLevelMaskSelect(
CMP_MODULE_ID index
);
Description
This function will select the high-level masking.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_HighLevelMaskSelect(MY_CMP_INSTANCE);
5.6.5.5.7.2 PLIB_CMP_LowLevelMaskSelect Function
C
void PLIB_CMP_LowLevelMaskSelect(
CMP_MODULE_ID index
);
Description
This function will select the low -evel masking
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_CMP_INSTANCE, is the Comparator instance selected for use by the
// application developer.
// PLIB_CMP_LowLevelMaskSelect(MY_CMP_INSTANCE);
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5.6.5.5.8 Data Types and Constants
5.6.5.5.8.1 CMP_CLOCK_DIVIDE Enumeration
C
typedef enum {
CMP_FILTER_CLOCK_DIVIDE_1_1,
CMP_FILTER_CLOCK_DIVIDE_1_2,
CMP_FILTER_CLOCK_DIVIDE_1_4,
CMP_FILTER_CLOCK_DIVIDE_1_8,
CMP_FILTER_CLOCK_DIVIDE_1_16,
CMP_FILTER_CLOCK_DIVIDE_1_32,
CMP_FILTER_CLOCK_DIVIDE_1_64,
CMP_FILTER_CLOCK_DIVIDE_1_128
} CMP_CLOCK_DIVIDE;
Description
CMP Filter Clock Divide Select
This macro defines the CMP filter clock divide
Members
Members Description
CMP_FILTER_CLOCK_DIVIDE_1_1 Comparator Filter Clock Division is 1:1
CMP_FILTER_CLOCK_DIVIDE_1_2 Comparator Filter Clock Division is 1:2
CMP_FILTER_CLOCK_DIVIDE_1_4 Comparator Filter Clock Division is 1:4
CMP_FILTER_CLOCK_DIVIDE_1_8 Comparator Filter Clock Division is 1:8
CMP_FILTER_CLOCK_DIVIDE_1_16 Comparator Filter Clock Division is 1:16
CMP_FILTER_CLOCK_DIVIDE_1_32 Comparator Filter Clock Division is 1:32
CMP_FILTER_CLOCK_DIVIDE_1_64 Comparator Filter Clock Division is 1:64
CMP_FILTER_CLOCK_DIVIDE_1_128 Comparator Filter Clock Division is 1:128
5.6.5.5.8.2 CMP_CVREF_BANDGAP_SELECT Enumeration
C
typedef enum {
CMP_CVREF_BANDGAP_1_2V,
CMP_CVREF_BANDGAP_0_6V,
CMP_CVREF_BANDGAP_VREFPLUS
} CMP_CVREF_BANDGAP_SELECT;
Description
CVREF bandgap select enumeration
This enumeration lists the possible Bandgap selection options.
Members
Members Description
CMP_CVREF_BANDGAP_1_2V Select the Band Gap Reference Source as 1.2 V
CMP_CVREF_BANDGAP_0_6V Select the Band Gap Reference Source as 0.6 V
CMP_CVREF_BANDGAP_VREFPLUS Select the Band Gap Reference Source as VREF
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Remarks
None.
5.6.5.5.8.3 CMP_CVREF_REFERENCE_SELECT Enumeration
C
typedef enum {
CMP_CVREF_RESISTOR_LADDER_VOLTAGE,
CMP_CVREF_POSITIVE_REFERENCE_VOLTAGE
} CMP_CVREF_REFERENCE_SELECT;
Description
CVREF reference select enumeration
This enumeration lists the possible reference selection options.
Members
Members Description
CMP_CVREF_RESISTOR_LADDER_VOLTAGE Select the Band Gap Reference Source as 1.2 V
CMP_CVREF_POSITIVE_REFERENCE_VOLTAGE Select the Band Gap Reference Source as 0.6 V
Remarks
None.
5.6.5.5.8.4 CMP_CVREF_VALUE Enumeration
C
typedef enum {
CMP_CVREF_VALUE_0,
CMP_CVREF_VALUE_1,
CMP_CVREF_VALUE_2,
CMP_CVREF_VALUE_3,
CMP_CVREF_VALUE_4,
CMP_CVREF_VALUE_5,
CMP_CVREF_VALUE_6,
CMP_CVREF_VALUE_7,
CMP_CVREF_VALUE_8,
CMP_CVREF_VALUE_9,
CMP_CVREF_VALUE_10,
CMP_CVREF_VALUE_11,
CMP_CVREF_VALUE_12,
CMP_CVREF_VALUE_13,
CMP_CVREF_VALUE_14,
CMP_CVREF_VALUE_15
} CMP_CVREF_VALUE;
Description
CVREF voltage reference value selection enumeration
This enumeration lists the possible Voltage reference value selection options.
Members
Members Description
CMP_CVREF_VALUE_0 Voltage reference value 0
CMP_CVREF_VALUE_1 Voltage reference value 1
CMP_CVREF_VALUE_2 Voltage reference value 2
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CMP_CVREF_VALUE_3 Voltage reference value 3
CMP_CVREF_VALUE_4 Voltage reference value 4
CMP_CVREF_VALUE_5 Voltage reference value 5
CMP_CVREF_VALUE_6 Voltage reference value 6
CMP_CVREF_VALUE_7 Voltage reference value 7
CMP_CVREF_VALUE_8 Voltage reference value 8
CMP_CVREF_VALUE_9 Voltage reference value 9
CMP_CVREF_VALUE_10 Voltage reference value 10
CMP_CVREF_VALUE_11 Voltage reference value 11
CMP_CVREF_VALUE_12 Voltage reference value 12
CMP_CVREF_VALUE_13 Voltage reference value 13
CMP_CVREF_VALUE_14 Voltage reference value 14
CMP_CVREF_VALUE_15 Voltage reference value 15
Remarks
None.
5.6.5.5.8.5 CMP_CVREF_VOLTAGE_SOURCE Enumeration
C
typedef enum {
CMP_CVREF_VOLTAGE_SOURCE_INTERNAL,
CMP_CVREF_VOLTAGE_SOURCE_EXTERNAL
} CMP_CVREF_VOLTAGE_SOURCE;
Description
CVREF Voltage source selection enumeration
This enumeration lists the possible Voltage source selection options.
Members
Members Description
CMP_CVREF_VOLTAGE_SOURCE_INTERNAL Select vdd/vss source
CMP_CVREF_VOLTAGE_SOURCE_EXTERNAL Select external voltage source
Remarks
None.
5.6.5.5.8.6 CMP_FILTER_CLOCK Enumeration
C
typedef enum {
CMP_FILTER_CLOCK_FP,
CMP_FILTER_CLOCK_FOSC,
CMP_FILTER_CLOCK_SYNCO1,
CMP_FILTER_CLOCK_T2CLK,
CMP_FILTER_CLOCK_T3CLK,
CMP_FILTER_CLOCK_T4CLK,
CMP_FILTER_CLOCK_T5CLK
} CMP_FILTER_CLOCK;
Description
CMP Filter Input Clock Select
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This macro defines the CMP filter input clock
Members
Members Description
CMP_FILTER_CLOCK_FP FP will be the CMP filter input clock
CMP_FILTER_CLOCK_FOSC FOSC will be the CMP filter input clock
CMP_FILTER_CLOCK_SYNCO1 SYNCO1 will be the CMP filter input clock
CMP_FILTER_CLOCK_T2CLK T2CLK will be the CMP filter input clock
CMP_FILTER_CLOCK_T3CLK T3CLK will be the CMP filter input clock
CMP_FILTER_CLOCK_T4CLK T4CLK will be the CMP filter input clock
CMP_FILTER_CLOCK_T5CLK T5CLK will be the CMP filter input clock
5.6.5.5.8.7 CMP_INTERRUPT_EVENT Enumeration
C
typedef enum {
CMP_INTERRUPT_GENERATION_DISABLED
} CMP_INTERRUPT_EVENT;
Description
CMP interrupt event Select
This macro defines the CMP interrupt events.
Members
Members Description
CMP_INTERRUPT_GENERATION_DISABLED Select vdd/vss source
5.6.5.5.8.8 CMP_INVERTING_INPUT Enumeration
C
typedef enum {
CMP_INPUT_C2IN_NEGATIVE
} CMP_INVERTING_INPUT;
Description
CMP inverting input channel select
This macro defines the list of CMP inverting Input
Members
Members Description
CMP_INPUT_C2IN_NEGATIVE Select vdd/vss source
5.6.5.5.8.9 CMP_MASK_A Enumeration
C
typedef enum {
CMP_MASK_A_PWM1L,
CMP_MASK_A_PWM1H,
CMP_MASK_A_PWM2L,
CMP_MASK_A_PWM2H,
CMP_MASK_A_PWM3L,
CMP_MASK_A_PWM3H,
CMP_MASK_A_PTGO18,
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CMP_MASK_A_PTGO19,
CMP_MASK_A_FLT2,
CMP_MASK_A_FLT4
} CMP_MASK_A;
Description
CMP Mask A Input Select
This macro defines the CMP Mask A Input.
Members
Members Description
CMP_MASK_A_PWM1L PWM1L will be the CMP mask A input
CMP_MASK_A_PWM1H PWM1H will be the CMP mask A input
CMP_MASK_A_PWM2L PWM2L will be the CMP mask A input
CMP_MASK_A_PWM2H PWM2H will be the CMP mask A input
CMP_MASK_A_PWM3L PWM3L will be the CMP mask A input
CMP_MASK_A_PWM3H PWM3H will be the CMP mask A input
CMP_MASK_A_PTGO18 PTGO18 will be the CMP mask A input
CMP_MASK_A_PTGO19 PTGO19 will be the CMP mask A input
CMP_MASK_A_FLT2 FLT2 will be the CMP mask A input
CMP_MASK_A_FLT4 FLT4 will be the CMP mask A input
5.6.5.5.8.10 CMP_MASK_B Enumeration
C
typedef enum {
CMP_MASK_B_PWM1L,
CMP_MASK_B_PWM1H,
CMP_MASK_B_PWM2L,
CMP_MASK_B_PWM2H,
CMP_MASK_B_PWM3L,
CMP_MASK_B_PWM3H,
CMP_MASK_B_PTGO18,
CMP_MASK_B_PTGO19,
CMP_MASK_B_FLT2,
CMP_MASK_B_FLT4
} CMP_MASK_B;
Description
CMP Mask B Input Select
This macro defines the CMP Mask B Input.
Members
Members Description
CMP_MASK_B_PWM1L PWM1L will be the CMP mask B input
CMP_MASK_B_PWM1H PWM1H will be the CMP mask B input
CMP_MASK_B_PWM2L PWM2L will be the CMP mask B input
CMP_MASK_B_PWM2H PWM2H will be the CMP mask B input
CMP_MASK_B_PWM3L PWM3L will be the CMP mask B input
CMP_MASK_B_PWM3H PWM3H will be the CMP mask B input
CMP_MASK_B_PTGO18 PTGO18 will be the CMP mask B input
CMP_MASK_B_PTGO19 PTGO19 will be the CMP mask B input
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CMP_MASK_B_FLT2 FLT2 will be the CMP mask B input
CMP_MASK_B_FLT4 FLT4 will be the CMP mask B input
5.6.5.5.8.11 CMP_MASK_C Enumeration
C
typedef enum {
CMP_MASK_C_PWM1L,
CMP_MASK_C_PWM1H,
CMP_MASK_C_PWM2L,
CMP_MASK_C_PWM2H,
CMP_MASK_C_PWM3L,
CMP_MASK_C_PWM3H,
CMP_MASK_C_PTGO18,
CMP_MASK_C_PTGO19,
CMP_MASK_C_FLT2,
CMP_MASK_C_FLT4
} CMP_MASK_C;
Description
CMP Mask C Input Select
This macro defines the CMP Mask C Input.
Members
Members Description
CMP_MASK_C_PWM1L PWM1L will be the CMP mask C input
CMP_MASK_C_PWM1H PWM1H will be the CMP mask C input
CMP_MASK_C_PWM2L PWM2L will be the CMP mask C input
CMP_MASK_C_PWM2H PWM2H will be the CMP mask C input
CMP_MASK_C_PWM3L PWM3L will be the CMP mask C input
CMP_MASK_C_PWM3H PWM3H will be the CMP mask C input
CMP_MASK_C_PTGO18 PTGO18 will be the CMP mask C input
CMP_MASK_C_PTGO19 PTGO19 will be the CMP mask C input
CMP_MASK_C_FLT2 FLT2 will be the CMP mask C input
CMP_MASK_C_FLT4 FLT4 will be the CMP mask C input
5.6.5.5.8.12 CMP_MODULE_ID Enumeration
C
typedef enum {
CMP_ID_1,
CMP_ID_2,
CMP_ID_3
} CMP_MODULE_ID;
Description
CMP Module ID
This enumeration identifies the CMP modules which are available on the microcontroller. This is the super set of all the possible
instances that might be available on the Microchip microcontrollers.
Members
Members Description
CMP_ID_1 CMP Module 1 ID
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CMP_ID_2 CMP Module 2 ID
CMP_ID_3 CMP Module 3 ID
Remarks
The caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to
the next.
Not all modules will be available on all microcontrollers. Refer to the data sheet for the specific controller in use to determine
which modules are supported. The numbers used in the enumeration values will match the numbers given in the data sheet.
5.6.5.5.8.13 CMP_NON_INVERTING_INPUT Enumeration
C
typedef enum {
CMP_INPUT_C2IN_POSITIVE,
CMP_INPUT_INTERNAL_CVREF
} CMP_NON_INVERTING_INPUT;
Description
CMP Non inverting input channel select
This macro defines the list of CMP non inverting Input
Members
Members Description
CMP_INPUT_C2IN_POSITIVE Select vdd/vss source
CMP_INPUT_INTERNAL_CVREF Select external voltage source
5.6.5.5.8.14 CMP_SPEED_POWER Enumeration
C
typedef enum {
CMP_SPEED_POWER_LOWER,
CMP_SPEED_POWER_HIGHER
} CMP_SPEED_POWER;
Description
CMP Speed/Power Select
This macro defines the Speed/Power of CMP
Members
Members Description
CMP_SPEED_POWER_LOWER CMP low-power, low-speed
CMP_SPEED_POWER_HIGHER CMP normal power, higher speed
5.6.5.5.9 Feature Existence Functions
5.6.5.5.9.1 PLIB_CMP_ExistsCVREFBGRefVoltageRangeSelect Function
C
bool PLIB_CMP_ExistsCVREFBGRefVoltageRangeSelect(
CMP_MODULE_ID index
);
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Description
This function identifies whether the CVREFBGRefVoltageRangeSelect feature is available on the Comparator module. When this
function returns true, these functions are supported on the device:
• PLIB_CMP_CVREF_BandGapReferenceSourceSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The CVREFBGRefVoltageRangeSelect feature is supported on the device
• false = The CVREFBGRefVoltageRangeSelect feature is not supported on the device
Remarks
None.
5.6.5.5.9.2 PLIB_CMP_ExistsCVREFEnableControl Function
C
bool PLIB_CMP_ExistsCVREFEnableControl(
CMP_MODULE_ID index
);
Description
This function identifies whether the CVREFEnableControl feature is available on the Comparator module. When this function
returns true, these functions are supported on the device:
• PLIB_CMP_CVREF_Enable
• PLIB_CMP_CVREF_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The CVREFEnableControl feature is supported on the device
• false = The CVREFEnableControl feature is not supported on the device
Remarks
None.
5.6.5.5.9.3 PLIB_CMP_ExistsCVREFOutputEnableControl Function
C
bool PLIB_CMP_ExistsCVREFOutputEnableControl(
CMP_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help Comparator Peripheral Library
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);
Description
This function identifies whether the CVREFOutputEnableControl feature is available on the Comparator module. When this
function returns true, these functions are supported on the device:
• PLIB_CMP_CVREF_OutputEnable
• PLIB_CMP_CVREF_OutputDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The CVREFOutputEnableControl feature is supported on the device
• false = The CVREFOutputEnableControl feature is not supported on the device
Remarks
None.
5.6.5.5.9.4 PLIB_CMP_ExistsCVREFRefVoltageRangeSelect Function
C
bool PLIB_CMP_ExistsCVREFRefVoltageRangeSelect(
CMP_MODULE_ID index
);
Description
This function identifies whether the CVREFRefVoltageRangeSelect feature is available on the Comparator module. When this
function returns true, the following function is supported on the device:
• PLIB_CMP_CVREF_ReferenceVoltageSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The CVREFRefVoltageRangeSelect feature is supported on the device
• false = The CVREFRefVoltageRangeSelect feature is not supported on the device
Remarks
None.
5.6.5.5.9.5 PLIB_CMP_ExistsCVREFValueSelect Function
C
bool PLIB_CMP_ExistsCVREFValueSelect(
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CMP_MODULE_ID index
);
Description
This function identifies whether the CVREFValueSelect feature is available on the Comparator module. When this function
returns true, the following function is supported on the device:
• PLIB_CMP_CVREF_ValueSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The CVREFValueSelect feature is supported on the device
• false = The CVREFValueSelect feature is not supported on the device
Remarks
None.
5.6.5.5.9.6 PLIB_CMP_ExistsCVREFVoltageRangeSelect Function
C
bool PLIB_CMP_ExistsCVREFVoltageRangeSelect(
CMP_MODULE_ID index
);
Description
This function identifies whether the CVREFVoltageRangeSelect feature is available on the Comparator module. When this
function returns true, the following function is supported on the device:
• PLIB_CMP_CVREF_SourceVoltageSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The CVREFVoltageRangeSelect feature is supported on the device
• false = The CVREFVoltageRangeSelect feature is not supported on the device
Remarks
None.
5.6.5.5.9.7 PLIB_CMP_ExistsCVREFWideRangeControl Function
C
bool PLIB_CMP_ExistsCVREFWideRangeControl(
CMP_MODULE_ID index
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);
Description
This function identifies whether the CVREFWideRangeControl feature is available on the Comparator module. When this
function returns true, these functions are supported on the device:
• PLIB_CMP_CVREF_WideRangeEnable
• PLIB_CMP_CVREF_WideRangeDisable
• PLIB_CMP_CVREF_WideRangeIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The CVREFWideRangeControl feature is supported on the device
• false = The CVREFWideRangeControl feature is not supported on the device
Remarks
None.
5.6.5.5.9.8 PLIB_CMP_ExistsEnableControl Function
C
bool PLIB_CMP_ExistsEnableControl(
CMP_MODULE_ID index
);
Description
This function identifies whether the ComparatorEnableControl feature is available on the Comparator module. When this function
returns true, these functions are supported on the device:
• PLIB_CMP_Enable
• PLIB_CMP_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ComparatorEnableControl feature is supported on the device
• false = The ComparatorEnableControl feature is not supported on the device
Remarks
None.
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5.6.5.5.9.9 PLIB_CMP_ExistsInterruptEventSelect Function
C
bool PLIB_CMP_ExistsInterruptEventSelect(
CMP_MODULE_ID index
);
Description
This function identifies whether the InterruptEventSelect feature is available on the Comparator module. When this function
returns true, this function is supported on the device:
• PLIB_CMP_InterruptEventSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The InterruptEventSelect feature is supported on the device
• false = The InterruptEventSelect feature is not supported on the device
Remarks
None.
5.6.5.5.9.10 PLIB_CMP_ExistsInvertingInputSelect Function
C
bool PLIB_CMP_ExistsInvertingInputSelect(
CMP_MODULE_ID index
);
Description
This function identifies whether the InvertingInputSelect feature is available on the Comparator module. When this function
returns true, this function is supported on the device:
• PLIB_CMP_InvertingInputChannelSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The InvertingInputSelect feature is supported on the device
• false = The InvertingInputSelect feature is not supported on the device
Remarks
None.
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5.6.5.5.9.11 PLIB_CMP_ExistsInvertOutputControl Function
C
bool PLIB_CMP_ExistsInvertOutputControl(
CMP_MODULE_ID index
);
Description
This function identifies whether the InvertOutputSelectControl feature is available on the Comparator module. When this function
returns true, these functions are supported on the device:
• PLIB_CMP_InvertedOutputSelect
• PLIB_CMP_NonInvertedOutputSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The InvertOutputSelectControl feature is supported on the device
• false = The InvertOutputSelectControl feature is not supported on the device
Remarks
None.
5.6.5.5.9.12 PLIB_CMP_ExistsNonInvertingInputSelect Function
C
bool PLIB_CMP_ExistsNonInvertingInputSelect(
CMP_MODULE_ID index
);
Description
This function identifies whether the NonInvertingInputSelect feature is available on the Comparator module. When this function
returns true, this function is supported on the device:
• PLIB_CMP_adc
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The NonInvertingInputSelect feature is supported on the device
• false = The NonInvertingInputSelect feature is not supported on the device
Remarks
None.
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5.6.5.5.9.13 PLIB_CMP_ExistsOutputEnableControl Function
C
bool PLIB_CMP_ExistsOutputEnableControl(
CMP_MODULE_ID index
);
Description
This function identifies whether the ComparatorOutputEnableControl feature is available on the Comparator module. When this
function returns true, these functions are supported on the device:
• PLIB_CMP_OutputEnable
• PLIB_CMP_OutputDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The ComparatorOutputEnableControl feature is supported on the device
• false = The ComparatorOutputEnableControl feature is not supported on the device
Remarks
None.
5.6.5.5.9.14 PLIB_CMP_ExistsOutputLevelControl Function
C
bool PLIB_CMP_ExistsOutputLevelControl(
CMP_MODULE_ID index
);
Description
This function identifies whether the OutputLevelSelectControl feature is available on the Comparator module. When this function
returns true, these functions are supported on the device:
• PLIB_CMP_OutputHighSelect
• PLIB_CMP_OutputLowSelect
• PLIB_CMP_Cmp1OutputHighSelect
• PLIB_CMP_Cmp1OutputLowSelect
• PLIB_CMP_Cmp2OutputHighSelect
• PLIB_CMP_Cmp2OutputLowSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true = The OutputLevelSelectControl feature is supported on the device
• false = The OutputLevelSelectControl feature is not supported on the device
Remarks
None.
5.6.5.5.9.15 PLIB_CMP_ExistsStopInIdle Function
C
bool PLIB_CMP_ExistsStopInIdle(
CMP_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the Comparator module. When this function returns true,
these functions are supported on the device:
• PLIB_CMP_StopInIdleModeEnable
• PLIB_CMP_StopInIdleModeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true = The StopInIdle feature is supported on the device
• false = The StopInIdle feature is not supported on the device
Remarks
None.
5.6.5.6 Files
Files
Name Description
plib_cmp.h Comparator Peripheral Library Interface Header for Comparator module definitions.
Description
5.6.5.6.1 plib_cmp.h
Comparator Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Comparator Peripheral Library for all families of Microchip microcontrollers. The definitions in this file are common to the
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Comparator peripheral.
Functions
Name Description
PLIB_CMP_AndGateAInputDisable A input disabled as input to the AND gate
PLIB_CMP_AndGateAInputEnable A input enabled as input to the AND gate.
PLIB_CMP_AndGateBInputDisable B input disabled as input to the AND gate.
PLIB_CMP_AndGateBInputEnable B input enabled as input to the AND gate.
PLIB_CMP_AndGateCInputDisable C input disabled as input to the AND gate.
PLIB_CMP_AndGateCInputEnable C input enabled as input to the AND gate.
PLIB_CMP_AndGateInvertedAInputDisable Inverted A input disabled as input to the AND gate.
PLIB_CMP_AndGateInvertedAInputEnable Inverted A input enabled as input to the AND gate.
PLIB_CMP_AndGateInvertedBInputDisable Inverted B input disabled as input to the AND gate.
PLIB_CMP_AndGateInvertedBInputEnable Inverted B input enabled as input to the AND gate.
PLIB_CMP_AndGateInvertedCInputDisable Inverted C input disabled as input to the AND gate.
PLIB_CMP_AndGateInvertedCInputEnable Inverted C input enabled as input to the AND gate.
PLIB_CMP_Cmp1OutputHighSelect Comparator output bit is set to '1'.
PLIB_CMP_Cmp1OutputLowSelect Comparator output bit is set to '0'.
PLIB_CMP_Cmp2OutputHighSelect Comparator output bit is set to '1'.
PLIB_CMP_Cmp2OutputLowSelect Comparator output bit is set to '0'.
PLIB_CMP_CVREF_BandGapReferenceSourceSelect Selects the band gap reference voltage source.
PLIB_CMP_CVREF_Disable Disables the voltage reference of the Comparator module.
PLIB_CMP_CVREF_Enable Enables the voltage reference of the Comparator module.
PLIB_CMP_CVREF_Output2Disable Disables the Vsource/2 voltage output.
PLIB_CMP_CVREF_Output2Enable Enables the Vsource/2 voltage output.
PLIB_CMP_CVREF_OutputDisable Disables the output voltage.
PLIB_CMP_CVREF_OutputEnable Enables the voltage output.
PLIB_CMP_CVREF_ReferenceVoltageSelect Selects the voltage reference value.
PLIB_CMP_CVREF_SourceNegativeInputSelect Configures the Comparator module to use the selected
input as a negative reference.
PLIB_CMP_CVREF_SourceVoltageSelect Connects the Comparator module to the selected voltage
source.
PLIB_CMP_CVREF_ValueGet Returns the voltage setting value.
PLIB_CMP_CVREF_ValueSelect Selects the voltage reference value.
PLIB_CMP_CVREF_WideRangeDisable Disables the wide range.
PLIB_CMP_CVREF_WideRangeEnable Enables the wide range.
PLIB_CMP_CVREF_WideRangeIsEnabled Returns whether the wide range is selected for the
reference voltage.
PLIB_CMP_Disable Disables the Comparator module.
PLIB_CMP_Enable Enables the Comparator module.
PLIB_CMP_EventHasOccurred Comparator event status.
PLIB_CMP_EventStatusClear Comparator event clear.
PLIB_CMP_ExistsCVREFBGRefVoltageRangeSelect Identifies whether the CVREFBGRefVoltageRangeSelect
feature exists on the Comparator module.
PLIB_CMP_ExistsCVREFEnableControl Identifies whether the CVREFEnableControl feature exists
on the Comparator module.
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PLIB_CMP_ExistsCVREFOutputEnableControl Identifies whether the CVREFOutputEnableControl feature
exists on the Comparator module.
PLIB_CMP_ExistsCVREFRefVoltageRangeSelect Identifies whether the CVREFRefVoltageRangeSelect
feature exists on the Comparator module.
PLIB_CMP_ExistsCVREFValueSelect Identifies whether the CVREFValueSelect feature exists on
the Comparator module.
PLIB_CMP_ExistsCVREFVoltageRangeSelect Identifies whether the CVREFVoltageRangeSelect feature
exists on the Comparator module.
PLIB_CMP_ExistsCVREFWideRangeControl Identifies whether the CVREFWideRangeControl feature
exists on the Comparator module.
PLIB_CMP_ExistsEnableControl Identifies whether the ComparatorEnableControl feature
exists on the Comparator module.
PLIB_CMP_ExistsInterruptEventSelect Identifies whether the InterruptEventSelect feature exists
on the Comparator module.
PLIB_CMP_ExistsInvertingInputSelect Identifies whether the InvertingInputSelect feature exists
on the Comparator module.
PLIB_CMP_ExistsInvertOutputControl Identifies whether the InvertOutputSelectControl feature
exists on the Comparator module.
PLIB_CMP_ExistsNonInvertingInputSelect Identifies whether the NonInvertingInputSelect feature
exists on the Comparator module.
PLIB_CMP_ExistsOutputEnableControl Identifies whether the ComparatorOutputEnableControl
feature exists on the Comparator module.
PLIB_CMP_ExistsOutputLevelControl Identifies whether the OutputLevelSelectControl feature
exists on the Comparator module.
PLIB_CMP_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the
Comparator module.
PLIB_CMP_FilterClockDivideSelect Comparator filter clock divide select.
PLIB_CMP_FilterDisable Comparator filter disable.
PLIB_CMP_FilterEnable Comparator filter enable.
PLIB_CMP_FilterInputClockSelect Comparator filter input clock select.
PLIB_CMP_HighLevelMaskSelect High-level masking select.
PLIB_CMP_HysteresisDisable Comparator hysteresis disable.
PLIB_CMP_HysteresisEnable Comparator hysteresis enable.
PLIB_CMP_InterruptEventSelect Comparator interrupt event select.
PLIB_CMP_InvertedOutputSelect Comparator output is inverted.
PLIB_CMP_InvertingInputChannelSelect Comparator inverting input channel select.
PLIB_CMP_LowLevelMaskSelect Low-level masking select.
PLIB_CMP_NegativeAndGateOutputDisable Negative AND gate output disable.
PLIB_CMP_NegativeAndGateOutputEnable Negative AND gate output enable.
PLIB_CMP_NonInvertedOutputSelect Comparator output is non-inverted.
PLIB_CMP_NonInvertingInputChannelSelect Comparator input channel select.
PLIB_CMP_OpAmpModeDisable Op amp operation mode disable.
PLIB_CMP_OpAmpModeEnable Op amp operation mode enable.
PLIB_CMP_OpAmpOutputDisable Op amp output disable.
PLIB_CMP_OpAmpOutputEnable Op amp output enable.
PLIB_CMP_OrGateAInputDisable OR gate A input disable.
PLIB_CMP_OrGateAInputEnable A input connected to OR gate.
PLIB_CMP_OrGateBInputDisable OR gate B input disable.
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PLIB_CMP_OrGateBInputEnable B input connected to OR gate.
PLIB_CMP_OrGateCInputDisable OR gate C input disable.
PLIB_CMP_OrGateCInputEnable C input connected to OR gate.
PLIB_CMP_OrGateInvertedAInputDisable OR gate inverted A input disable.
PLIB_CMP_OrGateInvertedAInputEnable Inverted A input connected to OR gate.
PLIB_CMP_OrGateInvertedBInputDisable OR gate inverted B input disable.
PLIB_CMP_OrGateInvertedBInputEnable Inverted B input connected to OR gate
PLIB_CMP_OrGateInvertedCInputDisable OR gate inverted C input disable.
PLIB_CMP_OrGateInvertedCInputEnable Inverted C input connected to OR gate
PLIB_CMP_OutputDisable Disables the Comparator output.
PLIB_CMP_OutputEnable Enables the Comparator output.
PLIB_CMP_OutputHighSelect Comparator output bit is set to '1'.
PLIB_CMP_OutputLowSelect Comparator output bit is set to '0'.
PLIB_CMP_OutputStatusGet Comparator output status.
PLIB_CMP_OutputSynchronousWithTimer1Disable Comparator output is asynchronous.
PLIB_CMP_OutputSynchronousWithTimer1Enable Comparator Output Synchronous mode select.
PLIB_CMP_PositiveAndGateOutputDisable Positive AND gate output disable.
PLIB_CMP_PositiveAndGateOutputEnable Positive AND gate output enable.
PLIB_CMP_StopInIdleModeDisable Disables Stop in Idle mode.
PLIB_CMP_StopInIdleModeEnable Enables Stop in Idle mode.
File Name
plib_cmp.h
Company
Microchip Technology Inc.
5.6.6 DMA Peripheral Library Help
5.6.6.1 Introduction
DMA Peripheral Library
for
Microchip Microcontrollers
Direct Memory Access (DMA) is a feature (sub-system) of the microcontroller that allows certain hardware sub-systems within
the microcontroller to access the system memory independently of the processor (or the CPU).
Description
DMA also assists in accessing peripheral memory along with the system memory (data RAM). The DMA sub-system in the PIC
family of microcontrollers is optimized for high-performance, real-time, embedded applications where determinism and system
latency are priorities.
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Figure-1: DMA Hardware Abstraction Model
5.6.6.2 Release Notes
MPLAB Harmony Version: v0.70b DMA PLIB Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.6.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.6.4 Using the Library
This topic describes the basic architecture of the DMA Peripheral Library and provides information and examples on how to use
it.
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Interface Header File: plib_dma.h
The interface to the DMA Peripheral Library is defined in the "plib_dma.h" header file. Any C language source (.c) file that uses
the DMA Peripheral library should include "plib_dma.h".
Library File:
The DMA Peripheral Library (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the peripheral interacts with the framework.
5.6.6.4.1 Hardware Abstraction Model
This library provides the low-level abstraction of the DMA module on the Microchip family of microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in the software and introduces the library interface.
Description
The DMA Peripheral Library software is depicted using the following block diagram.
Figure-2: DMA Software Abstraction Block Diagram
The DMA Peripheral Library takes requests from application software or the DMA device driver and controls the DMA core (the
DMA hardware) as per the inputs passed to the library.
The major components of the DMA Peripheral Library are:
• Source/Destination/Peripheral Address Management
• Source/Destination/Peripheral Data Management
• DMA Operating/Addressing Mode Management
• DMA Channel Management
• Interrupt Control and Management
The topic Library Overview explains in detail each block of the DMA Peripheral Library software architecture.
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Note: The interface provided is a superset of all the functionality of the available DMA module on the device. Refer to the
specific device data sheet or related family reference manual to determine the set of functions that are supported for each DMA
module on your device.
5.6.6.4.2 Library Usage Model
The library interface routines are divided into various topics, each of which addresses one of the blocks or the overall operation
of the DMA module.
Library Interface Section Description
Transfer/Abort (Synchronous) Handles the synchronous DMA transfer start and End. This force request is
controlled fully by the software.
Transfer/Abort (Asynchronous) Trigger
Management
Each DMA transaction can be asynchronously initiated or aborted by an
interrupt. This feature handles the required configuration.
Interrupt Control and Management Each DMA channel can be configured to respond to events such as
address error (upper address error, lower address error, etc.), transfer
count half done, transfer count done, source data completely transferred,
etc.
Operating/Addressing Mode Management Before initiating a DMA transaction, the addressing and operating modes of
the DMA module need to be configured (per channel basis). As an
example, the DMA module can be configured for one shot mode with
peripheral indirect addressing mode for a DMA transaction.
Channel Management Each DMA channel can be individually configured for a DMA transaction.
Priorities can be assigned, a channel can be enabled or disabled, channel
chaining can be used, etc.
Source/Destination/Peripheral Address
Management
For each DMA transaction to start, the DMA core needs to know the source
and destination addresses. This feature handles this type of configuration.
Source/Destination/Peripheral Data Management For each DMA transaction, the amount of data to be transferred, the source
and destination size, the transaction type (byte/word), and transaction size
can be configured by this feature.
Special Function Modules (CRC) Certain high-end controllers support this CRC generator. This feature can
be assigned to any of the available DMA channels. This feature handles the
configuration of these aspects.
Status (Including Channel) This feature specifies the application to access the status information of the
DMA and each channel.
5.6.6.4.3 How the Library Works
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine which modes are
supported.
5.6.6.4.3.1 General Configuration
DMA General configuration includes enabling, disabling DMA module globally. It also involves DMA suspend control and
behavior in Idle mode.
Enable/Disable DMA
Enabling and disabling the DMA are the basic routines that may be called during initialization and exit routines of the application.
DMA Enable/Disable Example:
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// Enable the DMA controller
PLIB_DMA_Enable ( DMA_ID_0 );
// Disable the DMA
PLIB_DMA_Disable ( DMA_ID_0 );
// Check the enable status of the DMA controller.
if(PLIB_DMA_IsEnabled( DMA_ID_0 ))
{
// application code
}
5.6.6.4.3.2 Transfer/Abort (Synchronous)
A DMA transaction can be initiated/aborted asynchronously by configuring an interrupt for a channel. Refer to Transfer/Abort
(Asynchronous) Trigger Management for details.
In many instances, an application or a device driver needs to initiate a DMA transfer or abort an ongoing DMA transfer for
reasons not necessarily known. To handle such cases, the DMA core supports a forceful DMA start and abort.
Note: The DMA abort is not supported by all devices. Refer to the specific device data sheet to determine availability of this
feature.
When a DMA force start request is sent and the channel is already processing/pending to process an interrupt-based DMA
transfer, the force transfer request will be ignored. In certain devices, a flag is raised to indicate a collision of DMA requests.
Refer to Status (Including Channel) for details. In certain devices, an interrupt is issued to indicate that the active channel may
not be able to keep up with the demands from the peripheral module being serviced. For more details refer to Interrupt Control
and Management.
A DMA force transfer is initiated by the PLIB_DMA_StartTransferSet Function.
A DMA force abort is initiated by the PLIB_DMA_AbortTransferSet Function.
DMA Transfer/Abort (Synchronous) Configuration
A DMA transfer can be initiated or aborted forcefully by the software.
Example:
// Initiate a forced transfer on channel-3
PLIB_DMA_StartTransferSet ( DMA_ID_0, DMA_CHANNEL_3 );
// Abort a transfer on channel-3
PLIB_DMA_AbortTransferSet ( DMA_ID_0, DMA_CHANNEL_3 );
5.6.6.4.3.3 Transfer/Abort (Asynchronous) Trigger Management
DMA Start IRQ
Each channel can be configured to initiate a DMA transaction based on the interrupt from a source. This can be enabled/disable
per channel basis. To initiate a DMA transfer upon an interrupt trigger, the IRQ number needs to be configured as the start IRQ
for this channel. Which source can act as the start IRQ is device-dependent. In certain devices, any of the available IRQs can be
configured as the starting IRQ, while in other devices, there is restriction on which interrupt source can act as the start IRQ.
Refer to the specific device data sheet to determine feature availability.
The starting IRQ is enabled by the PLIB_DMA_ChannelXTriggerEnable Function. A DMA channel can be configured to start a
DMA transfer based on the event on an IRQ using the PLIB_DMA_ChannelXStartIRQSet Function.
DMA Abort IRQ
Each channel can be configured to abort a DMA transaction based on the interrupt from a source. This can be enabled/disabled
per channel basis. To abort a DMA transfer upon an interrupt trigger, the IRQ number needs to be configured as the abort IRQ
for this channel.
The abort IRQ is enabled by the PLIB_DMA_ChannelXTriggerEnable Function. A DMA channel can be configured to abort a
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DMA transfer based on the event on an IRQ using the ChannelXAbortIRQSet Function.
DMA Pattern Matching Termination
Pattern Match Termination mode allows the user to end a transfer if a byte of data written during a transaction matches a specific
pattern. This feature is useful in applications where a variable data size is required and eases the setup of the DMA channel. The
UART module is a good example of where this can be effectively used. For details about the pattern data configuration refer to
Channel Management.
DMA Pattern match mode is enabled using the PLIB_DMA_ChannelXTriggerEnable Function. It can also be disabled using the
PLIB_DMA_ChannelXTriggerDisable Function.
DMA Transfer/Abort (Asynchronous) Configuration
A DMA transfer can also be triggered/aborted asynchronously by using an interrupt event. The interrupt event required to
initiate/abort a DMA transfer for a channel needs to be set. Prior to this, the start IRQ and abort IRQ both need to be enabled.
Example:
// Enable the start IRQ. An interrupt event can trigger a DMA transfer.
PLIB_DMA_ChannelXTriggerEnable ( DMA_ID_0, DMA_CHANNEL_3, DMA_CHANNEL_TRIGGER_TRANSFER_START );
// Enable the abort IRQ. An interrupt event can abort a DMA transfer on channel-3
PLIB_DMA_ChannelXTriggerEnable ( DMA_ID_0, DMA_CHANNEL_3, DMA_CHANNEL_TRIGGER_TRANSFER_ABORT );
// Set the start IRQ to UART-2 RX Interrupt
PLIB_DMA_ChannelXStartIRQSet ( DMA_ID_0, DMA_CHANNEL_3, DMA_TRIGGER_USART_2_RECEIVE );
// Set the abort IRQ to UART-2 error Interrupt
PLIB_DMA_ChannelXAbortIRQSet ( DMA_ID_0, DMA_CHANNEL_3, DMA_TRIGGER_USART_2_ERROR );
In some devices, abort IRQ trigger is not supported. Refer to the specific device data sheet to determine availability.
DMA Transfer Pattern Match Abort Configuration
The DMA transfer can also be aborted on a pattern match trigger (supported on PIC32 devices). Refer to Transfer/Abort
(Asynchronous) Trigger Management for more information on pattern match abort. To use this feature, it must first be enabled.
The pattern data needs to be programmed for the required channel. Once this is done, when a DMA transfer is in progress on
that particular channel, if the DMA controller comes across the data matching the programmed data the transfer is automatically
aborted.
Example:
// Enable the pattern match abort for channel-3
PLIB_DMA_ChannelXTriggerEnable ( DMA_ID_0, DMA_CHANNEL_3,
DMA_CHANNEL_TRIGGER_PATTERN_MATCH_ABORT );
// Set a pattern data to match
PLIB_DMA_ChannelXPatternDataSet ( DMA_ID_0, DMA_CHANNEL_3, 0xEE );
5.6.6.4.3.4 Interrupt Control and Management
The DMA module has the ability to generate interrupts reflecting the events that occur during the channel's data transfer.
The following are all of the possible interrupts generated during DMA operation. This topic provides information for configuring
these interrupts.
Error Interrupts
This type of event is signalled when an address error has occurred during the channel transfer operation. An address error also
can occur if a DMA operation accesses an address beyond configured address limits (low and high).
Abort Interrupts
This type of event is signalled when a DMA transfer is aborted because of a system event matching the abort IRQ configured for
the current channel.
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DMA Completion Interrupts (Block Completion Interrupts)
This event occurs when a channel transfers a block of configured data.
Call Complete Interrupts
This event occurs when a channel completes a cell sized data transfer.
DMA Midpoint Interrupts
This event occurs when the channel is at the midpoint of completing the data transfer.
Overrun Interrupts
When a DMA channel receives a trigger (software or hardware) while it is servicing another request, an overrun condition occurs.
This indicates that the channel is being requested before its current transaction is finished. An overrun condition will not result in
termination of the current transaction.
Source Address Pointer Activity Interrupts
This event occurs when the channel source pointer reached the end of the source or when it reaches the midpoint of the source
depending on the way this interrupt is configured.
Destination Address Pointer Activity Interrupts
This event occurs when the channel destination pointer reached the end of the destination or when it reaches the midpoint of the
destination depending on the way this interrupt is configured.
This feature helps in configuring the previously listed interrupts. Depending on the device selected, all or some of the interrupts
can be individually enabled and disabled. In addition, this feature obtains the status of the interrupts previously mentioned.
All of the interrupts belonging to the DMA channel map to the corresponding channel interrupt vector. In general, each channel of
the DMA has a dedicated vectored interrupt. Therefore, the ISR for each channel should internally check for the status of the
previously mentioned interrupts to respond to the corresponding events.
DMA Interrupt Control and Management
Each DMA channel has a vectored interrupt. However, each DMA channel internally generates various interrupts, which will
invoke the same channel interrupt based on various events. This feature helps to enable/disable them and is also used to obtain
the interrupt status.
Example:
// Enable the channel-3 source done interrupt
PLIB_DMA_ChannelXINTSourceEnable ( DMA_ID_0, DMA_CHANNEL_3, DMA_INT_SOURCE_DONE );
// Get the status of address error on channel-3
if(PLIB_DMA_ChannelXINTSourceFlagGet ( DMA_ID_0, DMA_CHANNEL_3, DMA_INT_ADDRESS_ERROR ))
{
// application code for error handling
}
// Disable the channel abort interrupt
PLIB_DMA_ChannelXINTSourceDisable (DMA_ID_0, DMA_CHANNEL_3, DMA_INT_TRANSFER_ABORT);
5.6.6.4.3.5 Operating/Addressing Mode Management
DMA Operating Modes
The various operating/transfer modes supported are:
• One-Shot mode
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• Repeated One-Shot mode
• Continuous mode
• Repeated Continuous mode
• Ping-Pong mode
• Null Data Write mode
One-Shot Mode
In One-Shot mode, a single transfer is performed for each trigger event. The trigger event can be synchronous (refer to
Transfer/Abort (Synchronous) or asynchronous (refer to Transfer/Abort (Asynchronous) Trigger Management). When a single
one-shot transfer occurs and the DMA count is decremented to zero, this disables the channel and requires the channel to be
re-enabled to perform the next transaction.
Repeated One-Shot Mode
In Repeated One-Shot mode, single transfers occurs repeatedly so long as triggers are being provided. When the DMA count
reaches zero, the channel is not disabled as in One-Shot mode, but the count is reloaded and transfers begin again.
Continuous Mode
In Continuous mode, a single trigger starts a sequence of back-to-back transfers. These continue with each transfer
decrementing the DMA count until it reaches zero. At this point, and like one-shot mode, the channel is disabled.
Repeated Continuous Mode
This mode can be seen as a combination of Continuous and Repeated One-Shot modes. Data transfers keep occurring so as
long as triggers are provided and multiple transfers can occur with each trigger. When the DMA count reaches zero, the address
and data registers are reloaded and the process is repeated.
Ping-Pong Mode
Certain devices support Ping-Pong mode, which allows the CPU to process one buffer while a second buffer operates with the
DMA channel. The net result is that the CPU has the entire DMA block transfer time to process the buffer that is currently not
being used by the DMA channel.
The following figure demonstrates the data flow for four DMA transactions using Ping-Pong mode.
Figure: Ping-Pong Mode
When the DMA is filling buffer-B, the CPU can process buffer-A and vice-versa.
Ping-Pong mode can be combined with One-Shot and Continuous modes (previously discussed) to create other combinations.
Null Data Write Mode
A DMA transfer operates only in one direction from the source address to the destination address. However, some
communication protocols require symmetrical buffer accesses, meaning that for every read operation performed on a buffer,
there must be an accompanying write operation. The Null Write mode is designed to satisfy this requirement. This mode works
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by transferring data from the source to the destination like any other DMA operation. Once this is done, the transferred data still
with the DMA buffer is written back to the source.
DMA Addressing Modes
The addressing modes can be broadly classified into the following categories:
• Register Indirect with Post Increment Addressing mode
• Register Indirect without Post Increment Addressing mode
• Source/destination increment based on size
• Source/destination decrement based on size
• Peripheral Indirect Addressing mode
Register Indirect With Post Increment Addressing Mode
In this mode, the source data address is incremented by one location after each DMA transaction. The starting address is
provided by a start address offset register.
Register Indirect Without Post Increment Addressing Mode
In this mode, the source data address is not updated after each DMA transaction. Therefore, the next DMA transfer is initiated
from the same RAM address. The starting address is provided by a start address offset register.
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Figure: Register Indirect Addressing with and without post-increment.
Source/Destination Increment Based on Size
After each DMA transaction, the source/destination (a separate configuration exist for each) address increments by the size of
data (word/byte) configured.
Source/Destination Decrement Based on Size
After each DMA transaction, the source/destination (a separate configuration exist for each) address decrements by the size of
data (word/byte) configured.
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Peripheral Indirect Addressing Mode
Peripheral Indirect Addressing (PIA) is a special auto-incrementing mode for the transfer of data to and from a multi-level
peripheral buffer. This mode is only available for specific peripherals designed with its use in mind. Refer to the specific device
data sheet to determine availability of this mode.
PIA-capable peripherals - When selected, the PIA-enabled peripheral generates a short Indirect Address (IA) (size defined by
the peripheral) to the DMA channel. The IA is logically ORed with either the contents of the source address or the destination
address to define a specific address for the peripheral inside the DMA address space.
DMA Operating/Transfer Modes:
Refer to Operating/Addressing Mode Management for descriptions of the available operating modes.
The following code demonstrates usage of Continuous mode.
Example:
// Enable the DMA
PLIB_DMA_Enable ( DMA_ID_0 );
// disable the selected channel-3
PLIB_DMA_ChannelXDisable ( DMA_ID_0, DMA_CHANNEL_3);
// program the source and destination addresses
// Set the source starting address to 0x1000
PLIB_DMA_ChannelXSourceStartAddressSet ( DMA_ID_0, DMA_CHANNEL_3, 0x1000 );
// Set the destination starting address to 0x2000
PLIB_DMA_ChannelXDestinationStartAddressSet ( DMA_ID_0, DMA_CHANNEL_3, 0x2000 );
// Set the transfer count to 100.
PLIB_DMA_ChannelXTransferCountSet ( DMA_ID_0, DMA_CHANNEL_3, 100 );
// set the data transfer mode to one-shot
PLIB_DMA_ChannelXOperatingTransferModeSelect ( DMA_ID_0, DMA_CHANNEL_3, DMA_MODE_CONTINUOUS );
// select the source addressing mode
PLIB_DMA_ChannelXSourceAddressModeSelect ( DMA_ID_0, DMA_CHANNEL_3,
DMA_ADDRESSING_SOURCE_INCREMENT_BASED_ON_SIZE );
// select the destination addressing mode
PLIB_DMA_ChannelXDestinationAddressModeSelect ( DMA_ID_0, DMA_CHANNEL_3,
DMA_ADDRESSING_DESTINATION_INCREMENT_BASED_ON_SIZE );
// Enable the channel
PLIB_DMA_ChannelXEnable ( DMA_ID_0, DMA_CHANNEL_3 );
// Initiate the transfer
PLIB_DMA_StartTransferSet ( DMA_ID_0, DMA_CHANNEL_3 );
DMA Addressing Modes:
DMA addressing modes can be selected by using following code snippet.
DMA Addressing mode Example:
// set the source address to increment upon each transfer
PLIB_DMA_ChannelXSourceAddressModeSelect ( DMA_ID_0, DMA_CHANNEL_3,
DMA_ADDRESSING_SOURCE_INCREMENT_BASED_ON_SIZE );
// Set the destination address to decrement upon each transfer
PLIB_DMA_ChannelXDestinationAddressModeSelect ( DMA_ID_0, DMA_CHANNEL_3,
DMA_ADDRESSING_DESTINATION_DECREMENT_BASED_ON_SIZE );
5.6.6.4.3.6 Channel Management
Each Channel in the DMA module is can be independently configured for a specific transaction with different properties.
The following aspects of the channel can be configured using this feature.
DMA Channel Enable/Disable
Each channel can be enabled or disabled to control the transactions on the channel. A DMA transfer can only occur when the
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channel is enabled. A DMA channel can be enabled using the PLIB_DMA_ChannelXEnable Function. When a channel is
disabled by calling the PLIB_DMA_ChannelXDisable Function function, no data transfers can occur on the channel.
DMA Channel Priority
The DMA module has a natural priority associated with each of the channels. Channel 0 has the highest priority. Each DMA
channel can be assigned priority. This priority scheme changes depending on the device selected. There are three ways in which
priorities are assigned in PIC microcontrollers. In the first method, two bits are allocated for each channel for priority. Therefore,
priorities 0 to 3 can be assigned to channels. The second is called round-robin. In this method, the module starts by giving
Channel 0 preference in any data transfer conflicts. For each successive transfer conflict, the next higher channel receives
preference, continuing as a cycle through all the channels. The third method is called fixed scheme, which always gives priority
to the lowest requesting channel number. The channel priority can be set using the PLIB_DMA_ChannelPrioritySelect Function
or the PLIB_DMA_ChannelXPrioritySelect Function depending on the device selected.
DMA Channel Chaining
Channel chaining is an enhancement to the DMA channel operation. A channel (slave channel) can be chained to an adjacent
channel (master channel). The slave channel will be enabled when a block transfer of the master channel completes. At this
point, any event on the slave channel will initiate a DMA transfer. If the channel has an event pending, a DMA transfer will begin
immediately. The channel chaining can be enabled or disabled using the PLIB_DMA_ChannelXChainEnable Function and the
PLIB_DMA_ChannelXChainDisable Function, respectively. The channel chaining higher/lower channel number can be
configured using the PLIB_DMA_ChannelXChainToHigher Function and the PLIB_DMA_ChannelXChainToLower Function.
DMA Channel Transfer Direction
Each DMA transfer will have a direction. It can be memory to peripheral, peripheral to memory, or memory to memory. This can
be set using the PLIB_DMA_ChannelXTransferDirectionSelect Function.
DMA Channel Pattern Data
On supported devices, a DMA transfer can be aborted by a pattern match (refer to Transfer/Abort (Asynchronous) Trigger
Management). The pattern data is per channel basis. It can be set using the PLIB_DMA_ChannelXPatternDataSet Function.
Channel Auto Enable
This feature can be used to keep the channel active even if a block transfer or pattern match occurs. This mode is useful for
applications that do repeated pattern matching. To enable this feature use the PLIB_DMA_ChannelXAutoEnable Function. To
disable this feature use the PLIB_DMA_ChannelXAutoDisable Function.
DMA Channel Configuration
The following example configures DMA Channel 3 by setting its priority to two, enabling the auto-enable feature (refer to Channel
Management section), enabling the channel chain feature and chaining Channel 3 and Channel 2, and finally enabling Channel 3.
Example:
// Disable the channel-3
PLIB_DMA_ChannelXDisable ( DMA_ID_0, DMA_CHANNEL_3 );
// set the channel priority to 2
PLIB_DMA_ChannelXPrioritySelect ( DMA_ID_0, DMA_CHANNEL_3, DMA_CHANNEL_PRIORITY_2 );
// Configure the channel auto enable feature
PLIB_DMA_ChannelXAutoEnable ( DMA_ID_0, DMA_CHANNEL_3 );
// Enable the channel chain feature
PLIB_DMA_ChannelXChainEnable ( DMA_ID_0, DMA_CHANNEL_3 );
// chain channel 3 to channel 2
PLIB_DMA_ChannelXChainToLower ( DMA_ID_0, DMA_CHANNEL_3 );
// Enable channel-3
PLIB_DMA_ChannelXEnable ( DMA_ID_0, DMA_CHANNEL_3 );
In some devices it is required to select the DMA transfer direction before initiating DMA transfer. This can be done using the
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following code.
Example:
// Disable channel-3
PLIB_DMA_ChannelXDisable ( DMA_ID_0, DMA_CHANNEL_3 );
// Set the data transfer direction from memory to peripheral
PLIB_DMA_ChannelXTransferDirectionSelect ( DMA_ID_0, DMA_CHANNEL_3,
DMA_READ_FROM_MEMORY_WRITE_TO_PERIPHERAL );
// we can also check the current channels transfer direction
// check the data transfer direction
if ( DMA_READ_FROM_PERIPHERAL_WRITE_TO_MEMORY == PLIB_DMA_ChannelXTransferDirectionGet (
DMA_ID_0, DMA_CHANNEL_3 ) )
{
// application code
}
5.6.6.4.3.7 Source/Destination/Peripheral Address Management
This topic describes configuring the source/destination/peripheral addresses involved in the DMA transfer.
Source/Destination Start Address
Before initiating a DMA transfer, the channel should be programmed with the source and the destination addresses. In supported
devices, this can be done using the PLIB_DMA_ChannelXSourceStartAddressSet Function and the
PLIB_DMA_ChannelXDestinationStartAddressSet Function, respectively. At any point, the programmed addresses can be read
using the PLIB_DMA_ChannelXSourceStartAddressGet Function and the PLIB_DMA_ChannelXDestinationStartAddressGet
Function.
Source/Destination Start Address Offset
In some devices, a dedicated region of RAM is allocated for DMA transfers typically called DMA RAM. For any DMA transfer, the
source or destination address needs to be defined as an offset from the starting of the DMA RAM for such devices. Use the
PLIB_DMA_ChannelXStartAddressOffsetSet Function to set the offset addresses of buffers A and B. Buffers A and B are used
in Ping-Pong mode. To learn more, refer to Operating/Addressing Mode Management.
Peripheral Address
When DMA is used for a peripheral to memory or a memory to peripheral transfer, the peripheral address within a register must
be set. This register needs to be programmed with the peripheral location where data transfers takes place. For example this can
be the I2C buffer Special Function Register (SFR) location or the UART Receive register, etc. To set the peripheral address use
the PLIB_DMA_ChannelXPeripheralAddressSet Function.
DMA Source/Destination/Peripheral Address Control
The first step in initiating a DMA transfer is to set the source and destination addresses.
The following example sets the source address and the destination address for Channel 3.
Example:
// Set the source starting address to 0x1000
PLIB_DMA_ChannelXSourceStartAddressSet ( DMA_ID_0, DMA_CHANNEL_3, 0x1000 );
// Set the destination starting address to 0x2000
PLIB_DMA_ChannelXDestinationStartAddressSet ( DMA_ID_0, DMA_CHANNEL_3, 0x2000 );
On certain devices, the source starting address needs to be given as an offset from the start of the DMA RAM address (in such
devices, only memory to peripheral transfers and vice-versa are possible). In such devices, the source start address is set using
the PLIB_DMA_ChannelXStartAddressOffsetSet function, as shown in the following code.
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Example:
// Set the offset-A register to 0x1000
PLIB_DMA_ChannelXStartAddressOffsetSet ( DMA_ID_0, DMA_CHANNEL_3, 0x1000,
DMA_ADDRESS_OFFSET_PRIMARY);
// If ping-pong mode is enabled we will make use of buffer-B, and in that case
// we need to set an address for that also
// Set the offset-B to 0x2000
PLIB_DMA_ChannelXStartAddressOffsetSet ( DMA_ID_0, DMA_CHANNEL_3, 0x2000,
DMA_ADDRESS_OFFSET_SECONDARY);
The following example sets the peripheral address when the DMA needs to be initiated between memory and peripheral.
DMA Peripheral Address Set Example:
// Set the peripheral address to ADC1 buffer for channel-3 transfers.
PLIB_DMA_ChannelXPeripheralAddressSet ( DMA_ID_0, DMA_CHANNEL_3, (volatile
uint16_t)(&ADC1BUF0));
There are also equivalent functions available within this library that read the source/destination/peripheral address set.
5.6.6.4.3.8 Source/Destination/Peripheral Data Management
This topic describes the data configuration.
Source/Destination Transfer Size Configuration
In supported devices, each channel can be programmed to read a particular sized data from a source, and write in a particular
size to a destination. Both the source and destination sizes are configurable. Use the PLIB_DMA_ChannelXSourceSizeSet
Function and the PLIB_DMA_ChannelXDestinationSizeSet Function for read size and write size configuration, respectively. For
example, the source size can be 200 bytes and the destination size can be 100 bytes. However, it is logical to have both set to
the same value. In some devices, the amount of data that needs to be transferred is independent of the source and destination,
and is called transfer count. In such devices use the PLIB_DMA_ChannelXTransferCountSet Function to set the total amount of
data (block transfer data).
Cell Size Configuration
In supported devices, when DMA transfer is initiated, the amount of data configured for a cell transfer will be delivered to the
destination per trigger. This can be configured using the PLIB_DMA_ChannelXCellSizeSet Function.
Channel Data Size
The DMA controller can handle both byte and word (16-bit) transactions. Each DMA channel is individually configurable for the
data size using the PLIB_DMA_ChannelXDataSizeSelect Function.
Source/Destination Pointer Read
In supported devices, the application can read the byte in source/destination to which the DMA core is currently pointing. This
can be done using the PLIB_DMA_ChannelXSourcePointer Function and the PLIB_DMA_ChannelXDestinationPointer Function
for source and destination, respectively.
DMA Source/Destination/Peripheral Data Control
After setting the source/destination address the amount of data that needs to be transferred is set in a DMA operation.
However, prior to that the data transaction type (byte/word) needs to be configured on certain devices.
Example:
// Set channel-3 transactions as byte transactions
PLIB_DMA_ChannelXDataSizeSelect ( DMA_ID_0, DMA_CHANNEL_3, DMA_CHANNEL_DATA_8 );
// Set channel-3 transactions as 16-bit transactions
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PLIB_DMA_ChannelXDataSizeSelect ( DMA_ID_0, DMA_CHANNEL_3, DMA_CHANNEL_DATA_16 );
// Get the current data size configured
if( DMA_CHANNEL_BYTE == PLIB_DMA_ChannelXDataSizeGet ( DMA_ID_0, DMA_CHANNEL_3 ))
{
// application code
}
Example:
// Set the transfer count to 100.
PLIB_DMA_ChannelXTransferCountSet ( DMA_ID_0, DMA_CHANNEL_3, 100 );
Some high-end microcontrollers (especially PIC32 devices) use the method of cell transfer and block transfer. A cell transfer is
the amount of data a DMA channel transfers per an event. In such microcontrollers the application can configure the sizes of the
source and destination (per channel basis). A block transfer is defined as the number of bytes transferred when a channel is
enabled. A block transfer is comprised of several cell transfers. For example, if the source and destination size is 100 and the
cell size is 10, it will take 10 cell transfers to complete the block transfer, which is 100 bytes (larger of source or destination
sizes).
DMA cell transfer configuration Example:
// Set the source size to be 100
PLIB_DMA_ChannelXSourceSizeSet ( DMA_ID_0, DMA_CHANNEL_3, 100 );
// Set the destination size to be 100
PLIB_DMA_ChannelXDestinationSizeSet ( DMA_ID_0, DMA_CHANNEL_3, 100 );
// Set the cell size to be 10
PLIB_DMA_ChannelXCellSizeSet ( DMA_ID_0, DMA_CHANNEL_3, 10 );
5.6.6.4.3.9 Special Function Modules (CRC)
Selected high-end devices support a special feature called the CRC generator.
Depending on the device, the is a highly configurable, 16-bit or 32-bit CRC generator. The CRC can be assigned to any available
DMA channel using PLIB_DMA_CRCChannelSelect Function. The CRC is enabled using the PLIB_DMA_CRCEnable Function.
Optionally, the data from the source can be subjected to byte reordering using the PLIB_DMA_CRCByteOrderSelect Function.
The data is then optionally passed to the Linear Shift Feedback Register (LFSR) CRC or the IP header checksum blocks using
the PLIB_DMA_CRCTypeSet Function.
The CRC feature is attached to a channel in one of two possible modes, Background or Append.
Background Mode
The CRC is calculated in the background, with normal DMA behavior maintained. This can be selected by disabling the Append
mode.
Append Mode
Data read from the source is not written to the destination, but the CRC data is accumulated in the CRC data register. The
accumulated CRC is written to the location specified by the destination address when a block transfer completes. This mode is
enabled by the PLIB_DMA_CRCAppendModeEnable Function.
The following code shows DMA CRC calculation in Append mode.
Example:
// CRC of the Flash block
uint32_t blockCRC;
bool error = false;
// disable the channel 0 interrupts using the Interrupts Peripheral Library
// Enable the DMA controller
PLIB_DMA_Enable ( DMA_ID_0 );
// disable the selected channel-3
PLIB_DMA_ChannelXDisable ( DMA_ID_0, DMA_CHANNEL_3 );
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// set the channel priority to 2
PLIB_DMA_ChannelXPrioritySelect ( DMA_ID_0, DMA_CHANNEL_3, DMA_CHANNEL_PRIORITY_2 );
// Configure the channel auto enable feature
PLIB_DMA_ChannelXAutoEnable ( DMA_ID_0, DMA_CHANNEL_3 );
// Disable the channel chain feature
PLIB_DMA_ChannelXChainDisable ( DMA_ID_0, DMA_CHANNEL_3 );
// Disable the start IRQ.
PLIB_DMA_ChannelXTriggerDisable ( DMA_ID_0, DMA_CHANNEL_3, DMA_CHANNEL_TRIGGER_TRANSFER_START
);
// Seed the CRC generator
PLIB_DMA_CRCDataWrite ( DMA_ID_0, 0xFFFF );
// use the standard CCITT CRC 16 polynomial : X^16+X^12+X^5+1
PLIB_DMA_CRCXOREnableSet ( DMA_ID_0, 0x1021 );
// set polynomial length to 16
PLIB_DMA_CRCPolynomialLengthSet (DMA_ID_0, 16);
// Enable append mode
PLIB_DMA_CRCAppendModeEnable ( DMA_ID_0 );
// Attach CRC to DMA channel-3
PLIB_DMA_CRCChannelSelect (DMA_ID_0, DMA_CHANNEL_3);
// Enable the CRC
PLIB_DMA_CRCEnable ( DMA_ID_0 );
// Set the source starting address to 0x1000
PLIB_DMA_ChannelXSourceStartAddressSet ( DMA_ID_0, DMA_CHANNEL_3, 0x1000 );
// Set the destination starting address to 0x2000
PLIB_DMA_ChannelXDestinationStartAddressSet ( DMA_ID_0, DMA_CHANNEL_3, 0x2000 );
// set source and destination size to 100
PLIB_DMA_ChannelXSourceSizeSet ( DMA_ID_0, DMA_CHANNEL_3, 100 );
PLIB_DMA_ChannelXDestinationSizeSet ( DMA_ID_0, DMA_CHANNEL_3, 100 );
// Set cell size to 100
PLIB_DMA_ChannelXCellSizeSet ( DMA_ID_0, DMA_CHANNEL_3, 100 );
//Enable channel-3
PLIB_DMA_ChannelXEnable ( DMA_ID_0, DMA_CHANNEL_3 );
// Force initiate a transfer
PLIB_DMA_StartTransferSet ( DMA_ID_0, DMA_CHANNEL_3 );
5.6.6.4.3.10 Status (including Channel)
This module gives application access to various DMA and channel status information.
5.6.6.5 Configuring the Library
The library is configured for the supported DMA Peripheral Library.
5.6.6.6 Library Interface
Data Types and Constants
Name Description
DMA_ADDRESS_OFFSET_TYPE Lists the possible DMA address offsets.
DMA_CHANNEL Lists the possible DMA channels available.
DMA_CHANNEL_ADDRESSING_MODE Lists the possible channel addressing modes.
DMA_CHANNEL_COLLISION Lists the possible channel collison types.
DMA_CHANNEL_DATA_SIZE Lists the possible data sizes for the DMA channel.
DMA_CHANNEL_PRIORITY Lists the possible channel priorities.
DMA_CHANNEL_TRANSFER_DIRECTION Lists the possible data transfer directions.
DMA_CHANNEL_TRIGGER_TYPE Lists the possible DMA channel triggers.
DMA_CRC_BIT_ORDER Lists the possible CRC caluculation bit orders
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DMA_CRC_BYTE_ORDER Lists the possible byte orders.
DMA_CRC_TYPE Lists the possible checksums.
DMA_DESTINATION_ADDRESSING_MODE Lists the possible destination addressing modes.
DMA_INT_TYPE Lists the possible Interrupt types for a particular channel-X
DMA_MODULE_ID Possible instances of the DMA module.
DMA_PATTERN_LENGTH Gives the DMA pattern length
DMA_PING_PONG_MODE Lists the possible ping-pong modes.
DMA_SOURCE_ADDRESSING_MODE Lists the possible source addressing modes.
DMA_TRANSFER_MODE Lists the possible DMA transfer/operating modes.
DMA_TRIGGER_SOURCE Lists the possible DMA trigger sources.
DMA Channel Configuration
Name Description
PLIB_DMA_ChannelPrioritySelect Sets the priority scheme of the DMA channels.
PLIB_DMA_ChannelPriorityGet Gets the priority scheme of the DMA channels.
PLIB_DMA_ChannelXAutoDisable Channel is disabled after a block transfer is complete.
PLIB_DMA_ChannelXAutoEnable Channel is continuously enabled.
PLIB_DMA_ChannelXBusyActiveSet Sets the Busy bit to active.
PLIB_DMA_ChannelXBusyInActiveSet Sets the Busy bit to inactive.
PLIB_DMA_ChannelXChainDisable Disables the channel chaining for the specified DMA channel.
PLIB_DMA_ChannelXChainEnable Channel chain feature is enabled.
PLIB_DMA_ChannelXChainToHigher Chains the specified channel to a channel higher in natural
priority.
PLIB_DMA_ChannelXChainToLower Chains the specified channel to a channel lower in natural
priority.
PLIB_DMA_ChannelXDisable Disable the specified channel.
PLIB_DMA_ChannelXEnable Enable the specified channel.
PLIB_DMA_ChannelXPriorityGet Gets the priority of the specified channel.
PLIB_DMA_ChannelXPrioritySelect Sets the priority of the specified channel.
PLIB_DMA_ChannelXTransferDirectionGet Returns the data transfer direction of the specified channel.
PLIB_DMA_ChannelXTransferDirectionSelect Selects the data transfer direction of the specified channel.
PLIB_DMA_ChannelXDisabledDisablesEvents Channel start/abort events will be ignored even if the channel
is disabled.
PLIB_DMA_ChannelXDisabledEnablesEvents Channel start/abort events will be registered even if the
channel is disabled.
PLIB_DMA_ChannelXPatternIgnoreByteDisable Disables the pattern match ignore byte.
PLIB_DMA_ChannelXPatternIgnoreByteEnable Enables the pattern match ignore byte.
PLIB_DMA_ChannelXPatternIgnoreByteIsEnabled Returns the state of the pattern match ignore byte.
PLIB_DMA_ChannelXPatternIgnoreGet Returns the pattern match ignore value.
PLIB_DMA_ChannelXPatternIgnoreSet Sets the pattern match ignore value.
PLIB_DMA_ChannelXPatternLengthGet Returns the pattern match length.
PLIB_DMA_ChannelXPatternLengthSet Sets the pattern match length.
DMA Channel Status Routines
Name Description
PLIB_DMA_ChannelXAutoIsEnabled Returns the channel automatic enable status.
PLIB_DMA_ChannelXBufferedDataIsWritten Returns the buffered data write status for the specified channel.
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PLIB_DMA_ChannelXBusyIsBusy Returns the busy status of the specified channel.
PLIB_DMA_ChannelXChainIsEnabled Returns the chain status of the specified channel.
PLIB_DMA_ChannelXCollisionStatus Returns the status of the specified collison type for the specified
channel.
PLIB_DMA_ChannelXEventIsDetected Returns the event status on the specified channel.
PLIB_DMA_ChannelXIsEnabled Return the enable status of the specified channel.
PLIB_DMA_ChannelXNullWriteModeIsEnabled Returns the enable status of the Null Write mode for the specified
channel.
PLIB_DMA_ChannelXPingPongModeGet Returns the Ping-Pong mode status for the specified channel.
PLIB_DMA_ChannelBitsGet Returns the DMA channel bits.
DMA CRC Module Interface Routines
Name Description
PLIB_DMA_CRCAppendModeDisable Disables the CRC append mode.
PLIB_DMA_CRCAppendModeEnable Enables the CRC append mode.
PLIB_DMA_CRCAppendModeIsEnabled Gets the enable status of the CRC append mode.
PLIB_DMA_CRCBitOrderSelect Selects the bit order for checksum caluculation.
PLIB_DMA_CRCByteOrderGet Gets the current byte order selected by the DMA module CRC feature.
PLIB_DMA_CRCByteOrderSelect Selects the byte order.
PLIB_DMA_CRCChannelGet Returns the current DMA channel to which the CRC is assigned.
PLIB_DMA_CRCChannelSelect Assignes the CRC to the specified DMA channel.
PLIB_DMA_CRCDataRead Reads the contents of the DMA CRC data register.
PLIB_DMA_CRCDataWrite Writes the contents of the DMA CRC data register with the specified
data.
PLIB_DMA_CRCDisable Disables the DMA module CRC feature.
PLIB_DMA_CRCEnable Enables the DMA module CRC feature.
PLIB_DMA_CRCPolynomialLengthGet Gets the current polynomial length.
PLIB_DMA_CRCPolynomialLengthSet Selects the polynomial length.
PLIB_DMA_CRCTypeGet Gets the current DMA module CRC feature type.
PLIB_DMA_CRCTypeSet Selects the DMA module CRC feature type.
PLIB_DMA_CRCWriteByteOrderAlter The source data is written to the destination reordered as defined by the
BYTO<1:0> bits.
PLIB_DMA_CRCWriteByteOrderMaintain The source data is written to the destination unaltered.
PLIB_DMA_CRCXOREnableGet Reads the CRC XOR register.
PLIB_DMA_CRCXOREnableSet Writes to the CRC XOR enable register as per the specified enable
mask.
DMA General Configuration Routines
Name Description
PLIB_DMA_BusyActiveReset Resets the BUSY bit of the DMA controller.
PLIB_DMA_BusyActiveSet Sets the BUSY bit of the DMA controller.
PLIB_DMA_Disable DMA module is disabled.
PLIB_DMA_Enable DMA module is enabled.
PLIB_DMA_StopInIdleDisable DMA transfers continue during Idle mode.
PLIB_DMA_StopInIdleEnable DMA transfers are halted during Idle mode.
PLIB_DMA_SuspendDisable DMA suspend is disabled and the DMA module operates normally.
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PLIB_DMA_SuspendEnable DMA transfers are suspended to allow uninterrupted access by the CPU to the
data bus.
DMA Global Status Routines
Name Description
PLIB_DMA_CRCIsEnabled Gets the enable status of the CRC feature.
PLIB_DMA_IsBusy Gets the BUSY bit of the DMA controller.
PLIB_DMA_IsEnabled Returns the DMA module enable status.
PLIB_DMA_LastBusAccessIsRead Returns true if the last DMA bus access was a read.
PLIB_DMA_LastBusAccessIsWrite Returns true if the last DMA bus access was a write.
PLIB_DMA_LastChannelActive Returns the last DMA channel that participated in the data transfer.
PLIB_DMA_RecentAddressAccessed Returns the address of the most recent DMA access.
PLIB_DMA_SuspendIsEnabled Returns the DMA suspend status.
DMA Interrupt Control and Management
Name Description
PLIB_DMA_ChannelXINTSourceDisable Disables the specified interrupt source for the specified channel.
PLIB_DMA_ChannelXINTSourceEnable Enables the specified interrupt source for the specified channel.
PLIB_DMA_ChannelXINTSourceFlagClear Clears the interrupt flag of the specified DMA interrupt source for the
specified channel.
PLIB_DMA_ChannelXINTSourceFlagGet Returns the status of the interrupt flag of the specified DMA interrupt
source for the specified channel.
PLIB_DMA_ChannelXINTSourceFlagSet Sets the interrupt flag of the specified DMA interrupt source for the
specified channel.
PLIB_DMA_ChannelXINTSourceIsEnabled Returns the enable status of the specified interrupt source for the
specified channel.
DMA Operating/Addressing Mode Configuration
Name Description
PLIB_DMA_ChannelXAddressModeGet Gets the channel address mode.
PLIB_DMA_ChannelXAddressModeSelect Sets the channel address mode.
PLIB_DMA_ChannelXDestinationAddressModeGet Gets the source address mode of the specified channel.
PLIB_DMA_ChannelXDestinationAddressModeSelect Sets the source address mode of the specified channel.
PLIB_DMA_ChannelXNullWriteModeDisable Disables the Null Write mode.
PLIB_DMA_ChannelXNullWriteModeEnable Enables the Null Write mode.
PLIB_DMA_ChannelXOperatingTransferModeGet Returns the current transfer/operating mode for the
specified channel.
PLIB_DMA_ChannelXOperatingTransferModeSelect Selects the transfer/operating mode for the specified
channel.
PLIB_DMA_ChannelXReloadDisable Disables reloading of the address and count registers.
PLIB_DMA_ChannelXReloadEnable Enables reloading of the address and count registers.
PLIB_DMA_ChannelXSourceAddressModeGet Gets the source address mode of the specified channel.
PLIB_DMA_ChannelXSourceAddressModeSelect Sets the source address mode of the specified channel.
PLIB_DMA_ChannelXReloadIsEnabled Returns the address and count registers reload enable
status.
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DMA Source/Destination/Peripheral Address Control Interface Routines
Name Description
PLIB_DMA_ChannelXDestinationStartAddressGet Reads the destination start address configured for the specified
channel.
PLIB_DMA_ChannelXDestinationStartAddressSet Writes the specified destination start address into the register
corresponding to the specified channel.
PLIB_DMA_ChannelXPeripheralAddressGet Gets the peripheral address configured for the specified
channel.
PLIB_DMA_ChannelXPeripheralAddressSet Sets the peripheral address for the specified channel.
PLIB_DMA_ChannelXSourceStartAddressGet Reads the source start address configured for the specified
channel.
PLIB_DMA_ChannelXSourceStartAddressSet Writes the specified source start address into the register
corresponding to the specified channel.
PLIB_DMA_ChannelXStartAddressOffsetGet Gets the primary/secondary start address (DPSRAM) offset.
PLIB_DMA_ChannelXStartAddressOffsetSet Sets the primary/secondary start address (DPSRAM) offset to
the value specified depending on the offset type specified for
the specified channel.
DMA Source/Destination/Peripheral Data Management
Name Description
PLIB_DMA_ChannelXCellProgressPointerGet Returns the number of bytes transferred since the last event.
PLIB_DMA_ChannelXCellSizeGet Reads the cell size (in bytes) configured for the specified channel.
PLIB_DMA_ChannelXCellSizeSet Writes the specified cell size into the register corresponding to the
specified channel.
PLIB_DMA_ChannelXDataSizeGet Returns the current data size for the specified channel.
PLIB_DMA_ChannelXDataSizeSelect Selects the data size for the specified channel.
PLIB_DMA_ChannelXDestinationPointerGet Reads the current byte of the destination being pointed to for the
specified channel.
PLIB_DMA_ChannelXDestinationSizeGet Reads the destination size configured for the specified channel.
PLIB_DMA_ChannelXDestinationSizeSet Writes the specified destination size into the register corresponding
to the specified channel.
PLIB_DMA_ChannelXPatternDataGet Returns the pattern matching (for DMA abort) data programmed for
the specified channel.
PLIB_DMA_ChannelXPatternDataSet Writes the specified pattern matching data (for DMA abort) into the
register corresponding to the specified channel.
PLIB_DMA_ChannelXSourcePointerGet Reads the current byte of the source being pointed to for the
specified channel.
PLIB_DMA_ChannelXSourceSizeGet Reads the source size configured for the specified channel.
PLIB_DMA_ChannelXSourceSizeSet Writes the specified source size into the register corresponding to
the specified channel.
PLIB_DMA_ChannelXTransferCountGet Gets the DMA data transfer count that is programmed for the
specified channel.
PLIB_DMA_ChannelXTransferCountSet Sets the DMA data transfer count for the specified channel.
DMA Transfer/Abort (Asynchronous) Trigger Management
Name Description
PLIB_DMA_ChannelXAbortIRQSet Sets the IRQ to abort the DMA transfer on the specified channel.
PLIB_DMA_ChannelXStartIRQSet Sets the IRQ to initiate the DMA transfer on the specified channel.
PLIB_DMA_ChannelXTriggerDisable Disables the DMA transfer abort via a matching interrupt (specified by the
IRQ).
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PLIB_DMA_ChannelXTriggerEnable Enables the specified DMA channel trigger.
PLIB_DMA_ChannelXTriggerIsEnabled Returns the enable status of the specified DMA transfer/abort trigger.
DMA Transfer/Abort (Synchronous)
Name Description
PLIB_DMA_AbortTransferSet Aborts transfer on the specified channel.
PLIB_DMA_StartTransferSet Initiates transfer on the specified channel.
Feature Existence Routines
Name Description
PLIB_DMA_ExistsAbortTransfer Identifies whether the AbortTransfer feature exists on the
DMA module.
PLIB_DMA_ExistsBusy Identifies whether the Busy feature exists on the DMA
module.
PLIB_DMA_ExistsChannelBits Identifies whether the ChannelBits feature exists on the DMA
module.
PLIB_DMA_ExistsChannelX Identifies whether the ChannelX feature exists on the DMA
module.
PLIB_DMA_ExistsChannelXAbortIRQ Identifies whether the ChannelXAbortIRQ feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXAuto Identifies whether the ChannelXAuto feature exists on the
DMA module.
PLIB_DMA_ExistsChannelXBusy Identifies whether the ChannelXBusy feature exists on the
DMA module.
PLIB_DMA_ExistsChannelXCellProgressPointer Identifies whether the ChannelXCellProgressPointer feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXCellSize Identifies whether the ChannelXCellSize feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXChain Identifies whether the ChannelXChain feature exists on the
DMA module.
PLIB_DMA_ExistsChannelXChainEnbl Identifies whether the ChannelXChainEnbl feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXDestinationPointer Identifies whether the ChannelXDestinationPointer feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXDestinationSize Identifies whether the ChannelXDestinationSize feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXDestinationStartAddress Identifies whether the ChannelXDestinationStartAddress
feature exists on the DMA module.
PLIB_DMA_ExistsChannelXDisabled Identifies whether the ChannelXDisabled feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXEvent Identifies whether the ChannelXEvent feature exists on the
DMA module.
PLIB_DMA_ExistsChannelXINTSource Identifies whether the ChannelXINTSource feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXINTSourceFlag Identifies whether the ChannelXINTSourceFlag feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXPatternData Identifies whether the ChannelXPatternData feature exists
on the DMA module
PLIB_DMA_ExistsChannelXPatternIgnore Identifies whether the ChannelXPatternIgnore feature exists
on the DMA module.
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PLIB_DMA_ExistsChannelXPatternIgnoreByte Identifies whether the ChannelXPatternIgnoreByte feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXPatternLength Identifies whether the ChannelXPatternLength feature exists
on the DMA module.
PLIB_DMA_ExistsChannelXPriority Identifies whether the ChannelXPriority feature exists on the
DMA module.
PLIB_DMA_ExistsChannelXSourcePointer Identifies whether the ChannelXSourcePointer feature exists
on the DMA module.
PLIB_DMA_ExistsChannelXSourceSize Identifies whether the ChannelXSourceSize feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXSourceStartAddress Identifies whether the ChannelXSourceStartAddress feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXStartIRQ Identifies whether the ChannelXStartIRQ feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXTrigger Identifies whether the ChannelXTrigger feature exists on the
DMA module.
PLIB_DMA_ExistsCRC Identifies whether the CRC feature exists on the DMA
module.
PLIB_DMA_ExistsCRCAppendMode Identifies whether the CRCAppendMode feature exists on
the DMA module.
PLIB_DMA_ExistsCRCBitOrder Identifies whether the CRCBitOrder feature exists on the
DMA module.
PLIB_DMA_ExistsCRCByteOrder Identifies whether the CRCByteOrder feature exists on the
DMA module.
PLIB_DMA_ExistsCRCChannel Identifies whether the CRCChannel feature exists on the
DMA module.
PLIB_DMA_ExistsCRCData Identifies whether the CRCData feature exists on the DMA
module.
PLIB_DMA_ExistsCRCPolynomialLength Identifies whether the CRCPolynomialLength feature exists
on the DMA module.
PLIB_DMA_ExistsCRCType Identifies whether the CRCType feature exists on the DMA
module.
PLIB_DMA_ExistsCRCWriteByteOrder Identifies whether the CRCWriteByteOrder feature exists on
the DMA module.
PLIB_DMA_ExistsCRCXOREnable Identifies whether the CRCXOREnable feature exists on the
DMA module.
PLIB_DMA_ExistsEnableControl Identifies whether the EnableControl feature exists on the
DMA module.
PLIB_DMA_ExistsLastBusAccess Identifies whether the LastBusAccess feature exists on the
DMA module.
PLIB_DMA_ExistsRecentAddress Identifies whether the RecentAddress feature exists on the
DMA module.
PLIB_DMA_ExistsStartTransfer Identifies whether the StartTransfer feature exists on the
DMA module.
PLIB_DMA_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the DMA
module.
PLIB_DMA_ExistsSuspend Identifies whether the Suspend feature exists on the DMA
module.
Description
This topic describes the functions of the DMA Peripheral Library.
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Refer to each topic for a detailed description.
5.6.6.6.1 DMA General Configuration Routines
5.6.6.6.1.1 PLIB_DMA_BusyActiveReset Function
C
void PLIB_DMA_BusyActiveReset(
DMA_MODULE_ID index
);
Description
This function resets the BUSY bit of the DMA controller. The DMA module is disabled and is not actively transferring data.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the Busy feature. This feature may not be available on all devices. Please refer to the
specific device data sheet to determine availability or use the PLIB_DMA_ExistsBusy function in your application to automatically
determine whether this feature is available.
Example
PLIB_DMA_BusyActiveReset( DMA_ID_0 );
5.6.6.6.1.2 PLIB_DMA_BusyActiveSet Function
C
void PLIB_DMA_BusyActiveSet(
DMA_MODULE_ID index
);
Description
This function sets the BUSY bit of the DMA controller. The DMA module is active.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the Busy feature. This feature may not be available on all devices. Please refer to the
specific device data sheet to determine availability or use the PLIB_DMA_ExistsBusy function in your application to automatically
determine whether this feature is available.
Example
PLIB_DMA_BusyActiveSet( DMA_ID_0 );
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5.6.6.6.1.3 PLIB_DMA_Disable Function
C
void PLIB_DMA_Disable(
DMA_MODULE_ID index
);
Description
This function disables the DMA module.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the EnableControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsEnableControl function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_Disable( DMA_ID_0 );
5.6.6.6.1.4 PLIB_DMA_Enable Function
C
void PLIB_DMA_Enable(
DMA_MODULE_ID index
);
Description
This function enables the DMA module.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the EnableControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsEnableControl function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_Enable( DMA_ID_0 );
5.6.6.6.1.5 PLIB_DMA_StopInIdleDisable Function
C
void PLIB_DMA_StopInIdleDisable(
DMA_MODULE_ID index
);
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Description
This function causes DMA transfers to continue during Idle mode.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the StopInIdle feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsStopInIdle function in your application to
automatically determine whether this feature is available.
Example
PLIB_DMA_StopInIdleDisable( DMA_ID_0 );
5.6.6.6.1.6 PLIB_DMA_StopInIdleEnable Function
C
void PLIB_DMA_StopInIdleEnable(
DMA_MODULE_ID index
);
Description
This function halts DMA transfers during Idle mode.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the StopInIdle feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsStopInIdle function in your application to
automatically determine whether this feature is available.
Example
PLIB_DMA_StopInIdleEnable( DMA_ID_0 );
5.6.6.6.1.7 PLIB_DMA_SuspendDisable Function
C
void PLIB_DMA_SuspendDisable(
DMA_MODULE_ID index
);
Description
This function disables the DMA suspend. The DMA module continues to operate normally.
Preconditions
None.
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Returns
None.
Remarks
This function implements an operation of the Suspend feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsSuspend function in your application to
automatically determine whether this feature is available.
Example
PLIB_DMA_SuspendDisable( DMA_ID_0 );
5.6.6.6.1.8 PLIB_DMA_SuspendEnable Function
C
void PLIB_DMA_SuspendEnable(
DMA_MODULE_ID index
);
Description
This function suspends the DMA transfers to allow uninterrupted access by the CPU to the data bus.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the Suspend feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsSuspend function in your application to
automatically determine whether this feature is available.
Example
PLIB_DMA_SuspendEnable( DMA_ID_0 );
5.6.6.6.2 DMA Transfer/Abort (Synchronous)
5.6.6.6.2.1 PLIB_DMA_AbortTransferSet Function
C
void PLIB_DMA_AbortTransferSet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function aborts transfer on the specified channel. This is a forced abort controlled via software.
Preconditions
None.
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Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the AbortTransfer feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsAbortTransfer function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_AbortTransferSet ( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.2.2 PLIB_DMA_StartTransferSet Function
C
void PLIB_DMA_StartTransferSet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function initiates transfer on the specified channel. This is a forced transfer controlled via software.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the StartTransfer feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsStartTransfer function in your application
to automatically determine whether this feature is available.
Example
PLIB_DMA_StartTransferSet ( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.3 DMA Transfer/Abort (Asynchronous) Trigger Management
5.6.6.6.3.1 PLIB_DMA_ChannelXAbortIRQSet Function
C
void PLIB_DMA_ChannelXAbortIRQSet(
DMA_MODULE_ID index,
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DMA_CHANNEL channel,
DMA_TRIGGER_SOURCE IRQ
);
Description
This function sets the IRQ to abort the DMA transfer on the specified channel. (IRQ to start the channel transfer.)
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
IRQnum The IRQ number of the trigger source of type DMA_TRIGGER_SOURCE
Returns
None.
Remarks
This function implements an operation of the ChannelXAbortIRQ feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXAbortIRQ function
in your application to automatically determine whether this feature is available.
Example
DMA_TRIGGER_SOURCE irq = DMA_TRIGGER_TIMER_CORE;
PLIB_DMA_ChannelXAbortIRQSet ( DMA_ID_0,
DMA_CHANNEL_4,
irq );
5.6.6.6.3.2 PLIB_DMA_ChannelXStartIRQSet Function
C
void PLIB_DMA_ChannelXStartIRQSet(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_TRIGGER_SOURCE IRQnum
);
Description
This function sets the IRQ to initiate the DMA transfer on the specified channel. (IRQ to start the channel transfer.)
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
IRQnum The IRQ number of the trigger source of type DMA_TRIGGER_SOURCE
Returns
None.
Remarks
This function implements an operation of the ChannelXStartIRQ feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXStartIRQ function in your
application to automatically determine whether this feature is available.
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Example
//This code is for PIC24F family
DMA_TRIGGER_SOURCE irq = DMA_TRIGGER_OUTPUT_COMPARE_1;
PLIB_DMA_ChannelXStartIRQSet ( DMA_ID_0,
DMA_CHANNEL_4,
irq );
5.6.6.6.3.3 PLIB_DMA_ChannelXTriggerDisable Function
C
void PLIB_DMA_ChannelXTriggerDisable(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_CHANNEL_TRIGGER_TYPE trigger
);
Description
This function disables the DMA transfer abort via a matching interrupt (specified by the IRQ). The interrupt number IRQ is
ignored and does not terminate a transfer.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
trigger Type of trigger (transfer start/abort/pattern match abort)
Returns
None.
Remarks
This function implements an operation of the ChannelXTrigger feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXTrigger function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_ChannelXTriggerDisable ( DMA_ID_0,
DMA_CHANNEL_4,
DMA_CHANNEL_TRIGGER_PATTERN_MATCH_ABORT );
5.6.6.6.3.4 PLIB_DMA_ChannelXTriggerEnable Function
C
void PLIB_DMA_ChannelXTriggerEnable(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_CHANNEL_TRIGGER_TYPE trigger
);
Description
This function enables the the specified DMA channel trigger.
Preconditions
None.
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Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
trigger Type of trigger (transfer start/abort/pattern match abort)
Returns
None.
Remarks
This function implements an operation of the ChannelXTrigger feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXTrigger function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_ChannelXTriggerEnable ( DMA_ID_0,
DMA_CHANNEL_4,
DMA_CHANNEL_TRIGGER_TRANSFER_ABORT );
5.6.6.6.3.5 PLIB_DMA_ChannelXTriggerIsEnabled Function
C
bool PLIB_DMA_ChannelXTriggerIsEnabled(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_CHANNEL_TRIGGER_TYPE trigger
);
Description
This function returns the enable status of the specified DMA transfer/abort trigger.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
trigger Type of trigger (transfer start/abort/pattern match abort)
Returns
• true - The specified trigger is enabled
• false - The specified trigger is disabled
Remarks
This function implements an operation of the ChannelXTrigger feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXTrigger function in your
application to automatically determine whether this feature is available.
Example
bool startTriggerstatus;
startTriggerstatus = PLIB_DMA_ChannelXTriggerIsEnabled (
DMA_ID_0,
DMA_CHANNEL_4,
DMA_CHANNEL_TRIGGER_TRANSFER_START );
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5.6.6.6.4 DMA Interrupt Control and Management
5.6.6.6.4.1 PLIB_DMA_ChannelXINTSourceDisable Function
C
void PLIB_DMA_ChannelXINTSourceDisable(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
DMA_INT_TYPE dmaINTSource
);
Description
This function disables the specified interrupt source for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
dmaINTSource One of the DMA interrupt sources specified by DMA_INT_TYPE
Returns
None.
Remarks
This function implements an operation of the ChannelXINTSource feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXINTSource function
in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
PLIB_DMA_ChannelXINTSourceDisable ( DMA_ID_0,
spiDMAChannel,
DMA_INT_ADDRESS_ERROR );
5.6.6.6.4.2 PLIB_DMA_ChannelXINTSourceEnable Function
C
void PLIB_DMA_ChannelXINTSourceEnable(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
DMA_INT_TYPE dmaINTSource
);
Description
This function enables the specified interrupt source for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
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dmaINTSource One of the DMA interrupt sources specified by DMA_INT_TYPE
Returns
None.
Remarks
This function implements an operation of the ChannelXINTSource feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXINTSource function
in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
PLIB_DMA_ChannelXINTSourceEnable ( DMA_ID_0,
spiDMAChannel,
DMA_INT_ADDRESS_ERROR );
5.6.6.6.4.3 PLIB_DMA_ChannelXINTSourceFlagClear Function
C
void PLIB_DMA_ChannelXINTSourceFlagClear(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
DMA_INT_TYPE dmaINTSource
);
Description
This function clears the interrupt flag of the specified DMA interrupt source for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
dmaINTSource One of the DMA interrupt sources specified by DMA_INT_TYPE
Returns
None.
Remarks
This function implements an operation of the ChannelXINTSourceFlag feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXINTSourceFlag
function in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
PLIB_DMA_ChannelXINTSourceFlagClear ( DMA_ID_0,
spiDMAChannel,
DMA_INT_ADDRESS_ERROR );
5.6.6.6.4.4 PLIB_DMA_ChannelXINTSourceFlagGet Function
C
bool PLIB_DMA_ChannelXINTSourceFlagGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
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DMA_INT_TYPE dmaINTSource
);
Description
This function returns the status of the interrupt flag of the specified DMA interrupt source for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
dmaINTSource One of the DMA interrupt sources specified by DMA_INT_TYPE
Returns
• true - The interrupt flag is set
• false - The interrupt flag is not set
Remarks
This function implements an operation of the ChannelXINTSourceFlag feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXINTSourceFlag
function in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
bool AddressErrorINTStatus;
AddressErrorINTStatus = PLIB_DMA_ChannelXINTSourceFlagGet (
DMA_ID_0,
spiDMAChannel,
DMA_INT_ADDRESS_ERROR );
5.6.6.6.4.5 PLIB_DMA_ChannelXINTSourceFlagSet Function
C
void PLIB_DMA_ChannelXINTSourceFlagSet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
DMA_INT_TYPE dmaINTSource
);
Description
This function sets the interrupt flag of the specified DMA interrupt source for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
dmaINTSource One of the DMA interrupt sources specified by DMA_INT_TYPE
Returns
None.
Remarks
This function implements an operation of the ChannelXINTSourceFlag feature. This feature may not be available on all devices.
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Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXINTSourceFlag
function in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
PLIB_DMA_ChannelXINTSourceFlagSet ( DMA_ID_0,
spiDMAChannel,
DMA_INT_ADDRESS_ERROR );
5.6.6.6.4.6 PLIB_DMA_ChannelXINTSourceIsEnabled Function
C
bool PLIB_DMA_ChannelXINTSourceIsEnabled(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
DMA_INT_TYPE dmaINTSource
);
Description
This function returns the enable status of the specified interrupt source for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
dmaINTSource One of the DMA interrupt sources specified by DMA_INT_TYPE
Returns
• true - The interrupt is enabled
• false - The interrupt is not enabled
Remarks
This function implements an operation of the ChannelXINTSource feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXINTSource function
in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
bool dmaINTSourceEnableStatus;
dmaINTSourceEnableStatus = PLIB_DMA_ChannelXINTSourceIsEnabled (
DMA_ID_0,
spiDMAChannel,
DMA_INT_ADDRESS_ERROR );
5.6.6.6.5 DMA Operating/Addressing Mode Configuration
5.6.6.6.5.1 PLIB_DMA_ChannelXAddressModeGet Function
C
DMA_CHANNEL_ADDRESSING_MODE PLIB_DMA_ChannelXAddressModeGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
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Description
This function gets the channel address mode.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
channelAddressMode - One of the possible source addressing modes listed by DMA_CHANNEL_ADDRESSING_MODE
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_CHANNEL_ADDRESSING_MODE channelAddressMode;
channelAddressMode = PLIB_DMA_ChannelXAddressModeGet ( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.5.2 PLIB_DMA_ChannelXAddressModeSelect Function
C
void PLIB_DMA_ChannelXAddressModeSelect(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_CHANNEL_ADDRESSING_MODE channelAddressMode
);
Description
This function sets the channel address mode.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
channelAddressMode One of the possible channel addressing modes listed by
DMA_CHANNEL_ADDRESSING_MODE
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_DMA_ChannelXAddressModeSelect (
DMA_ID_0,
DMA_CHANNEL_4,
DMA_ADDRESSING_REGISTER_INDIRECT_WITH_POST_INCREMENT );
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5.6.6.6.5.3 PLIB_DMA_ChannelXDestinationAddressModeGet Function
C
DMA_DESTINATION_ADDRESSING_MODE PLIB_DMA_ChannelXDestinationAddressModeGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function gets the source address mode of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
destinationAddressMode - One of the possible source addressing modes listed by DMA_DESTINATION_ADDRESSING_MODE
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_SOURCE_ADDRESSING_MODE destinationAddressMode;
destinationAddressMode = PLIB_DMA_ChannelXDestinationAddressModeGet (
DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.5.4 PLIB_DMA_ChannelXDestinationAddressModeSelect Function
C
void PLIB_DMA_ChannelXDestinationAddressModeSelect(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_DESTINATION_ADDRESSING_MODE destinationAddressMode
);
Description
This function Sets the source address mode of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
destinationAddressMode One of the possible source addressing modes listed by
DMA_DESTINATION_ADDRESSING_MODE
Returns
None.
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Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_DMA_ChannelXDestinationAddressModeSelect (
DMA_ID_0,
DMA_CHANNEL_4,
DMA_ADDRESSING_DESTINATION_INCREMENT_BASED_ON_SIZE );
5.6.6.6.5.5 PLIB_DMA_ChannelXNullWriteModeDisable Function
C
void PLIB_DMA_ChannelXNullWriteModeDisable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function disables the Null Write mode. No dummy write is initiated.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_DMA_ChannelXNullWriteModeDisable ( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.5.6 PLIB_DMA_ChannelXNullWriteModeEnable Function
C
void PLIB_DMA_ChannelXNullWriteModeEnable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function enables the Null Write mode. A dummy write is initiated to the source address for every write to the destination
address.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
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Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_DMA_ChannelXNullWriteModeEnable ( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.5.7 PLIB_DMA_ChannelXOperatingTransferModeGet Function
C
DMA_TRANSFER_MODE PLIB_DMA_ChannelXOperatingTransferModeGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the current transfer/operating mode for the specified channel. (Transfer mode and operating mode are used
interchangably.)
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
channeltransferMode - One of the possible operating/transfer modes listed by DMA_TRANSFER_MODE
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_TRANSFER_MODE channeltransferMode;
channeltransferMode = PLIB_DMA_ChannelXOperatingTransferModeGet (
DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.5.8 PLIB_DMA_ChannelXOperatingTransferModeSelect Function
C
void PLIB_DMA_ChannelXOperatingTransferModeSelect(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_TRANSFER_MODE channeltransferMode
);
Description
This function selects the transfer/operating mode for the specified channel. (Transfer mode and operating mode are used
interchangably.)
Preconditions
None.
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Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
channeltransferMode One of the possible operating/transfer modes listed by DMA_TRANSFER_MODE
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_TRANSFER_MODE channeltransferMode = DMA_MODE_REPEATED_CONTINUOUS;
PLIB_DMA_ChannelXOperatingTransferModeSelect ( DMA_ID_0,
DMA_CHANNEL_4,
channeltransferMode );
5.6.6.6.5.9 PLIB_DMA_ChannelXReloadDisable Function
C
void PLIB_DMA_ChannelXReloadDisable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function disables reloading of the address and count registers. The source, destination address, and the DMA count
registers are not reloaded to their previous values upon the start of the next operation.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_DMA_ChannelXReloadDisable ( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.5.10 PLIB_DMA_ChannelXReloadEnable Function
C
void PLIB_DMA_ChannelXReloadEnable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
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Description
This function enables reloading of the address and count registers. The source, destination address, and the DMA count
registers are reloaded to their previous values upon the start of the next operation.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_DMA_ChannelXReloadEnable ( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.5.11 PLIB_DMA_ChannelXSourceAddressModeGet Function
C
DMA_SOURCE_ADDRESSING_MODE PLIB_DMA_ChannelXSourceAddressModeGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function gets the source address mode of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
DMA_SOURCE_ADDRESSING_MODE - One of the possible source addressing modes listed by
DMA_SOURCE_ADDRESSING_MODE
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_SOURCE_ADDRESSING_MODE sourceAddressMode;
sourceAddressMode = PLIB_DMA_ChannelXSourceAddressModeGet ( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.5.12 PLIB_DMA_ChannelXSourceAddressModeSelect Function
C
void PLIB_DMA_ChannelXSourceAddressModeSelect(
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DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_SOURCE_ADDRESSING_MODE sourceAddressMode
);
Description
This function sets the source address mode of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
sourceAddressMode One of the possible source addressing modes listed by
DMA_SOURCE_ADDRESSING_MODE
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_DMA_ChannelXSourceAddressModeSelect (
DMA_ID_0,
DMA_CHANNEL_4,
DMA_ADDRESSING_SOURCE_INCREMENT_BASED_ON_SIZE );
5.6.6.6.5.13 PLIB_DMA_ChannelXReloadIsEnabled Function
C
bool PLIB_DMA_ChannelXReloadIsEnabled(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the address and count registers reload enable status.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
• true - The address and count registers reload is enabled
• false - The address and count registers reload is disabled
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
bool chAddressCountReloadStatus;
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chAddressCountReloadStatus = PLIB_DMA_ChannelXReloadIsEnabled (
DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.6 DMA Source/Destination/Peripheral Address Control Interface
Routines
5.6.6.6.6.1 PLIB_DMA_ChannelXDestinationStartAddressGet Function
C
uint32_t PLIB_DMA_ChannelXDestinationStartAddressGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel
);
Description
This function reads the destination start address configured for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
uint32_t - The destination start address configured for this channel
Remarks
This function implements an operation of the ChannelXDestinationStartAddress feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use the
PLIB_DMA_ExistsChannelXDestinationStartAddress function in your application to automatically determine whether this feature
is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint32_t DestinationStartAddress;
DestinationStartAddress = PLIB_DMA_ChannelXDestinationStartAddressGet (
DMA_ID_0,
spiDMAChannel );
5.6.6.6.6.2 PLIB_DMA_ChannelXDestinationStartAddressSet Function
C
void PLIB_DMA_ChannelXDestinationStartAddressSet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
uint32_t destinationStartAddress
);
Description
This function writes the specified destination start address into the register corresponding to the specified channel.
Preconditions
None.
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Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
destinationStartAddress The destination start address
Returns
None.
Remarks
This function implements an operation of the ChannelXDestinationStartAddress feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use the
PLIB_DMA_ExistsChannelXDestinationStartAddress function in your application to automatically determine whether this feature
is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint32_t destinationStartAddress = 0x00FDEA00;
PLIB_DMA_ChannelXDestinationStartAddressSet( DMA_ID_0,
spiDMAChannel,
destinationStartAddress );
5.6.6.6.6.3 PLIB_DMA_ChannelXPeripheralAddressGet Function
C
uint16_t PLIB_DMA_ChannelXPeripheralAddressGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function gets the peripheral address configured for the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
uint16_t - The peripheral address configured for the specified channel
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
uint16_t peripheraladdress;
peripheraladdress = PLIB_DMA_ChannelXPeripheralAddressGet ( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.6.4 PLIB_DMA_ChannelXPeripheralAddressSet Function
C
void PLIB_DMA_ChannelXPeripheralAddressSet(
DMA_MODULE_ID index,
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DMA_CHANNEL channel,
uint16_t peripheraladdress
);
Description
This function sets the peripheral address for the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
peripheraladdress The peripheral address for the specified channel
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
uint16_t peripheraladdress = 0x100;
PLIB_DMA_ChannelXPeripheralAddressSet ( DMA_ID_0,
DMA_CHANNEL_4,
peripheraladdress );
5.6.6.6.6.5 PLIB_DMA_ChannelXSourceStartAddressGet Function
C
uint32_t PLIB_DMA_ChannelXSourceStartAddressGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel
);
Description
This function reads the source start address configured for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
uint32_t - The source start address configured for this channel
Remarks
This function implements an operation of the ChannelXSourceStartAddress feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use the
PLIB_DMA_ExistsChannelXSourceStartAddress function in your application to automatically determine whether this feature is
available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
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uint32_t SourceStartAddress;
SourceStartAddress = PLIB_DMA_ChannelXSourceStartAddressGet(DMA_ID_0,
spiDMAChannel );
5.6.6.6.6.6 PLIB_DMA_ChannelXSourceStartAddressSet Function
C
void PLIB_DMA_ChannelXSourceStartAddressSet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
uint32_t sourceStartAddress
);
Description
This function writes the specified Source start address into the register corresponding to the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
sourceStartAddress The source start address
Returns
None.
Remarks
This function implements an operation of the ChannelXSourceStartAddress feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use the
PLIB_DMA_ExistsChannelXSourceStartAddress function in your application to automatically determine whether this feature is
available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint32_t sourceStartAddress = 0x00FDEA00;
PLIB_DMA_ChannelXSourceStartAddressSet ( DMA_ID_0,
spiDMAChannel,
sourceStartAddress );
5.6.6.6.6.7 PLIB_DMA_ChannelXStartAddressOffsetGet Function
C
uint16_t PLIB_DMA_ChannelXStartAddressOffsetGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_ADDRESS_OFFSET_TYPE offset
);
Description
This function gets the primary/secondary start address (DPSRAM) offset.
Preconditions
None.
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Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
offset The type of the address offset (primary/secondary)
Returns
uint16_t - The primary/secondary DPSRAM start address offset
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
uint16_t addressOffsetA;
addressOffsetA = PLIB_DMA_ChannelXStartAddressOffsetGet (
DMA_ID_0,
DMA_CHANNEL_4,
address,
DMA_ADDRESS_OFFSET_PRIMARY );
5.6.6.6.6.8 PLIB_DMA_ChannelXStartAddressOffsetSet Function
C
void PLIB_DMA_ChannelXStartAddressOffsetSet(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
uint16_t address,
DMA_ADDRESS_OFFSET_TYPE offset
);
Description
This function sets the primary/secondary start address (DPSRAM) offset to the value specified depending on the offset type
specified for the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
address The primary/secondary DPSRAM start address offset
offset The type of the address offset (primary/secondary)
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
uint16_t address = 0x100;
PLIB_DMA_ChannelXStartAddressOffsetSet ( DMA_ID_0,
DMA_CHANNEL_4,
address,
DMA_ADDRESS_OFFSET_PRIMARY );
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5.6.6.6.7 DMA Source/Destination/Peripheral Data Management
5.6.6.6.7.1 PLIB_DMA_ChannelXCellProgressPointerGet Function
C
uint16_t PLIB_DMA_ChannelXCellProgressPointerGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel
);
Description
This function returns the number of bytes transferred since the last event.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
uint16_t - The number of bytes transferred since the last event. (The cell progress pointer (8-bit, 16-bit) is device-specific. Please
refer to the specific device data sheet to determine availability.)
Remarks
This function implements an operation of the ChannelXCellProgressPointer feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use the
PLIB_DMA_ExistsChannelXCellProgressPointer function in your application to automatically determine whether this feature is
available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t CellProgress;
CellProgress = PLIB_DMA_ChannelXCellProgressPointerGet ( DMA_ID_0,
spiDMAChannel );
5.6.6.6.7.2 PLIB_DMA_ChannelXCellSizeGet Function
C
uint16_t PLIB_DMA_ChannelXCellSizeGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel
);
Description
This function reads the cell size (in bytes) configured for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
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Returns
uint16_t - The cell size configured (in bytes) for this channel (The cell size (8-bit, 16-bit) is device-specific. Please refer to the
specific device data sheet to determine availability.)
Remarks
This function implements an operation of the ChannelXCellSize feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXCellSize function in your
application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t cellSize;
cellSize = PLIB_DMA_ChannelXCellSizeGet ( DMA_ID_0,
spiDMAChannel );
5.6.6.6.7.3 PLIB_DMA_ChannelXCellSizeSet Function
C
void PLIB_DMA_ChannelXCellSizeSet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
uint16_t CellSize
);
Description
This function writes the specified cell size into the register corresponding to the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
cellSize The cell size in bytes (The cell size (8-bit, 16-bit) is device-specific. Please refer to
the specific device data sheet to determine availability.)
Returns
None.
Remarks
This function implements an operation of the ChannelXCellSize feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXCellSize function in your
application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t cellSize = 0x10;
PLIB_DMA_ChannelXCellSizeSet ( DMA_ID_0, spiDMAChannel, cellSize );
5.6.6.6.7.4 PLIB_DMA_ChannelXDataSizeGet Function
C
DMA_CHANNEL_DATA_SIZE PLIB_DMA_ChannelXDataSizeGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
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Description
This function returns the current data size for the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
channelDataSize - One of the possible data sizes listed by DMA_CHANNEL_DATA_SIZE
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_CHANNEL_DATA_SIZE channelDataSize;
channelDataSize = PLIB_DMA_ChannelXDataSizeGet( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.7.5 PLIB_DMA_ChannelXDataSizeSelect Function
C
void PLIB_DMA_ChannelXDataSizeSelect(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_CHANNEL_DATA_SIZE channelDataSize
);
Description
This function selects the data size for the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
channelDataSize One of the possible data sizes listed by DMA_CHANNEL_DATA_SIZE
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_CHANNEL_DATA_SIZE channelDataSize = DMA_CHANNEL_DATA_8;
PLIB_DMA_ChannelXDataSizeSelect ( DMA_ID_0,
DMA_CHANNEL_4,
channelDataSize );
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5.6.6.6.7.6 PLIB_DMA_ChannelXDestinationPointerGet Function
C
uint16_t PLIB_DMA_ChannelXDestinationPointerGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel
);
Description
This function reads the current byte of the destination being pointed to for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
uint16_t - The destination byte being pointed to for this channel (The destination pointer (8-bit, 16-bit) is device-specific. Please
refer to the specific device data sheet to determine availability.)
Remarks
This function implements an operation of the ChannelXDestinationPointer feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use the
PLIB_DMA_ExistsChannelXDestinationPointer function in your application to automatically determine whether this feature is
available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t destinationbyte;
destinationbyte = PLIB_DMA_ChannelXDestinationPointerGet ( DMA_ID_0,
spiDMAChannel );
5.6.6.6.7.7 PLIB_DMA_ChannelXDestinationSizeGet Function
C
uint16_t PLIB_DMA_ChannelXDestinationSizeGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel
);
Description
This function reads the destination size configured for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
uint16_t - The destination size configured (in bytes) for this channel. (The destination size (8-bit, 16-bit) is device-specific. Please
refer to the specific device data sheet to determine availability.)
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Remarks
This function implements an operation of the ChannelXDestinationSize feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXDestinationSize
function in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t DestinationSize;
DestinationSize = PLIB_DMA_ChannelXDestinationSizeGet ( DMA_ID_0,
spiDMAChannel );
5.6.6.6.7.8 PLIB_DMA_ChannelXDestinationSizeSet Function
C
void PLIB_DMA_ChannelXDestinationSizeSet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
uint16_t destinationSize
);
Description
This function writes the specified destination size into the register corresponding to the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
destinationSize The destination size (The destination size (8-bit, 16-bit) is device-specific. Please
refer to the specific device data sheet to determine availability.)
Returns
None.
Remarks
This function implements an operation of the ChannelXDestinationSize feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXDestinationSize
function in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t destinationSize = 0xA00;
PLIB_DMA_ChannelXDestinationSizeSet( DMA_ID_0, spiDMAChannel, destinationSize );
5.6.6.6.7.9 PLIB_DMA_ChannelXPatternDataGet Function
C
uint16_t PLIB_DMA_ChannelXPatternDataGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel
);
Description
This function returns pattern matching (for DMA abort) data programmed for the specified channel. (The size of pattern matching
data(8-bit, 16-bit) is device-specific. Please refer to the specific device data sheet to determine availability.)
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Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
uint16_t - The pattern matching data programmed for the current channel (The size of pattern matching data(8-bit, 16-bit) is
device-specific. Please refer to the specific device data sheet to determine availability.)
Remarks
This function implements an operation of the ChannelXPatternData feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXPatternData
function in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t patternData;
patternData = PLIB_DMA_ChannelXPatternDataGet ( DMA_ID_0, spiDMAChannel );
5.6.6.6.7.10 PLIB_DMA_ChannelXPatternDataSet Function
C
void PLIB_DMA_ChannelXPatternDataSet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
uint16_t patternData
);
Description
This function writes the specified pattern matching data (for DMA abort) into the register corresponding to the specified channel.
(The size of pattern matching data(8-bit, 16-bit) is device-specific. Please refer to the specific device data sheet to determine
availability.)
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
patternData The pattern matching DATA programmed for the current channel (The size of
pattern matching data(8-bit, 16-bit) is device-specific. Please refer to the specific
device data sheet to determine availability.)
Returns
None.
Remarks
This function implements an operation of the ChannelXPatternData feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXPatternData
function in your application to automatically determine whether this feature is available.
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Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t patternData = '0';
PLIB_DMA_ChannelXPatternDataSet ( DMA_ID_0, spiDMAChannel, patternData );
5.6.6.6.7.11 PLIB_DMA_ChannelXSourcePointerGet Function
C
uint16_t PLIB_DMA_ChannelXSourcePointerGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel
);
Description
This function reads the current byte of the source being pointed to for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
uint16_t - The source byte being pointed to for this channel. (The source pointer (8-bit, 16-bit) is device-specific. Please refer to
the specific device data sheet to determine availability.)
Remarks
This function implements an operation of the ChannelXSourcePointer feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXSourcePointer
function in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t sourcebyte;
sourcebyte = PLIB_DMA_ChannelXSourcePointerGet ( DMA_ID_0, spiDMAChannel );
5.6.6.6.7.12 PLIB_DMA_ChannelXSourceSizeGet Function
C
uint16_t PLIB_DMA_ChannelXSourceSizeGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel
);
Description
This function reads the source size configured for the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
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Returns
uint16_t - The Source size configured (in bytes) for this channel. (The source size (8-bit, 16-bit) is device-specific. Please refer to
the specific device data sheet to determine availability.)
Remarks
This function implements an operation of the ChannelXSourceSize feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXSourceSize
function in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t sourceSize;
sourceSize = PLIB_DMA_ChannelXSourceSizeGet ( DMA_ID_0,
spiDMAChannel );
5.6.6.6.7.13 PLIB_DMA_ChannelXSourceSizeSet Function
C
void PLIB_DMA_ChannelXSourceSizeSet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
uint16_t sourceSize
);
Description
This function writes the specified source size into the register corresponding to the specified channel.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
sourceSize The source size (The source size (8-bit, 16-bit) is device-specific. Please refer to
the specific device data sheet to determine availability.)
Returns
None.
Remarks
This function implements an operation of the ChannelXSourceSize feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXSourceSize
function in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL spiDMAChannel = DMA_CHANNEL_2;
uint16_t sourceSize = 0xA00;
PLIB_DMA_ChannelXSourceSizeSet ( DMA_ID_0,
spiDMAChannel,
sourceSize );
5.6.6.6.7.14 PLIB_DMA_ChannelXTransferCountGet Function
C
uint16_t PLIB_DMA_ChannelXTransferCountGet(
DMA_MODULE_ID index,
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DMA_CHANNEL channel
);
Description
This function gets the DMA data transfer count that is programmed for the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
uint16_t - The DMA transfer count for the channel
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
uint16_t transferCount;
transferCount = PLIB_DMA_ChannelXTransferCountGet ( DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.7.15 PLIB_DMA_ChannelXTransferCountSet Function
C
void PLIB_DMA_ChannelXTransferCountSet(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
uint16_t transferCount
);
Description
This function sets the DMA data transfer count for the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
transferCount The DMA transfer count for the channel
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
uint16_t transferCount = 0x10;
PLIB_DMA_ChannelXTransferCountSet ( DMA_ID_0,
DMA_CHANNEL_4,
transferCount );
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5.6.6.6.8 DMA Channel Configuration
5.6.6.6.8.1 PLIB_DMA_ChannelPrioritySelect Function
C
void PLIB_DMA_ChannelPrioritySelect(
DMA_MODULE_ID index,
DMA_CHANNEL_PRIORITY channelPriority
);
Description
This function sets the priority scheme of the DMA channels at the global level. This function is used in devices that do not have
the per channel priority feature.
Preconditions
None.
Parameters
Parameters Description
channelPriority One of the supported priorities listed by DMA_CHANNEL_PRIORITY
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_CHANNEL_PRIORITY channelPriority = DMA_CHANNEL_ROUND_ROBIN;
PLIB_DMA_ChannelPrioritySelect( DMA_ID_0, channelPriority );
5.6.6.6.8.2 PLIB_DMA_ChannelPriorityGet Function
C
DMA_CHANNEL_PRIORITY PLIB_DMA_ChannelPriorityGet(
DMA_MODULE_ID index
);
Description
This function gets the priority scheme of the DMA channels at the global level. This function is used in devices that do not have
the per channel priority feature.
Preconditions
None.
Returns
channelPriority - One of the supported priorities listed by DMA_CHANNEL_PRIORITY
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_CHANNEL_PRIORITY channelPriority;
channelPriority = PLIB_DMA_ChannelPriorityGet( DMA_ID_0 );
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5.6.6.6.8.3 PLIB_DMA_ChannelXAutoDisable Function
C
void PLIB_DMA_ChannelXAutoDisable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function disables a channel after a block transfer is complete.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelXAuto feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXAuto function in your
application to determine whether this feature is available.
Example
PLIB_DMA_ChannelXAutoDisable( DMA_ID_0, DMA_CHANNEL_2 );
5.6.6.6.8.4 PLIB_DMA_ChannelXAutoEnable Function
C
void PLIB_DMA_ChannelXAutoEnable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function enables the channel continuously. The channel is not automatically disabled after a block transfer is complete.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelXAuto feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXAuto function in your
application to determine whether this feature is available.
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Example
PLIB_DMA_ChannelXAutoEnable( DMA_ID_0, DMA_CHANNEL_2 );
5.6.6.6.8.5 PLIB_DMA_ChannelXBusyActiveSet Function
C
void PLIB_DMA_ChannelXBusyActiveSet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function sets the busy bit to active, indicating the channel is active or has been enabled.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelXBusy feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXBusy function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_ChannelXBusyActiveSet ( DMA_ID_0, DMA_CHANNEL_4 );
5.6.6.6.8.6 PLIB_DMA_ChannelXBusyInActiveSet Function
C
void PLIB_DMA_ChannelXBusyInActiveSet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function sets the busy bit to inactive, indicating the channel is inactive or has been disabled.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelXBusy feature. This feature may not be available on all devices. Please
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refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXBusy function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_ChannelXBusyInActiveSet ( DMA_ID_0, DMA_CHANNEL_4 );
5.6.6.6.8.7 PLIB_DMA_ChannelXChainDisable Function
C
void PLIB_DMA_ChannelXChainDisable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function disables the channel chaining for the specified DMA channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelXChainEnbl feature. This feature may not be available on all devices.
Please refer to the specfic device data sheet to determine availability or use the the PLIB_DMA_ExistsChannelXChainEnbl
function in your application to determine whether this feature is available.
Example
PLIB_DMA_ChannelXChainDisable( DMA_ID_0, DMA_CHANNEL_2 );
5.6.6.6.8.8 PLIB_DMA_ChannelXChainEnable Function
C
void PLIB_DMA_ChannelXChainEnable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function enables the channel chain feature.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
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Remarks
This function implements an operation of the ChannelXChainEnbl feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXChainEnbl function
in your application to determine whether this feature is available.
Example
PLIB_DMA_ChannelXChainEnable( DMA_ID_0, DMA_CHANNEL_2 );
5.6.6.6.8.9 PLIB_DMA_ChannelXChainToHigher Function
C
void PLIB_DMA_ChannelXChainToHigher(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function will Chain the specified channel to a channel higher in natural priority. CH5 will be enabled by a CH4 transfer
complete.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelXChain feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXChain function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_ChannelXChainToHigher ( DMA_ID_0, DMA_CHANNEL_4 );
5.6.6.6.8.10 PLIB_DMA_ChannelXChainToLower Function
C
void PLIB_DMA_ChannelXChainToLower(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function will chain the specified channel to a channel lower in natural priority. CH3 will be enabled by a CH4 transfer
complete.
Preconditions
None.
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Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelXChain feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXChain function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_ChannelXChainToLower ( DMA_ID_0, DMA_CHANNEL_4 );
5.6.6.6.8.11 PLIB_DMA_ChannelXDisable Function
C
void PLIB_DMA_ChannelXDisable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function will disable the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelX feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelX function in your application to
automatically determine whether this feature is available.
Example
PLIB_DMA_ChannelXDisable ( DMA_ID_0, DMA_CHANNEL_2 );
5.6.6.6.8.12 PLIB_DMA_ChannelXEnable Function
C
void PLIB_DMA_ChannelXEnable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function will enable the specified channel.
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Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelX feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelX function in your application to
automatically determine whether this feature is available.
Example
PLIB_DMA_ChannelXEnable ( DMA_ID_0, DMA_CHANNEL_2 );
5.6.6.6.8.13 PLIB_DMA_ChannelXPriorityGet Function
C
DMA_CHANNEL_PRIORITY PLIB_DMA_ChannelXPriorityGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function gets the priority of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the existing DMA channels listed by DMA_CHANNEL
Returns
channelPriority - One of the supported priorities listed by DMA_CHANNEL_PRIORITY
Remarks
This function implements an operation of the ChannelXPriority feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXPriority function in your
application to determine whether this feature is available.
Example
DMA_CHANNEL channel = DMA_CHANNEL_0;
DMA_CHANNEL_PRIORITY channelPriority;
channelPriority = PLIB_DMA_ChannelXPriorityGet( DMA_ID_0, channel );
5.6.6.6.8.14 PLIB_DMA_ChannelXPrioritySelect Function
C
void PLIB_DMA_ChannelXPrioritySelect(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
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DMA_CHANNEL_PRIORITY channelPriority
);
Description
This function sets the priority of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the existing DMA channels listed by DMA_CHANNEL
channelPriority One of the supported priorities listed by DMA_CHANNEL_PRIORITY
Returns
None.
Remarks
This function implements an operation of the ChannelXPriority feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXPriority function in your
application to determine whether this feature is available.
Example
DMA_CHANNEL channel = DMA_CHANNEL_0;
DMA_CHANNEL_PRIORITY channelPriority = DMA_CHANNEL_PRIORITY_3;
PLIB_DMA_ChannelXPrioritySelect( DMA_ID_0, channel, channelPriority );
5.6.6.6.8.15 PLIB_DMA_ChannelXTransferDirectionGet Function
C
DMA_CHANNEL_TRANSFER_DIRECTION PLIB_DMA_ChannelXTransferDirectionGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the data transfer direction of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
DMA_CHANNEL_TRANSFER_DIRECTION - The transfer direction indicated by the DMA_CHANNEL_TRANSFER_DIRECTION
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_CHANNEL_TRANSFER_DIRECTION chTransferDirection;
chTransferDirection = PLIB_DMA_ChannelXTransferDirectionGet (
DMA_ID_0,
DMA_CHANNEL_4 );
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5.6.6.6.8.16 PLIB_DMA_ChannelXTransferDirectionSelect Function
C
void PLIB_DMA_ChannelXTransferDirectionSelect(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_CHANNEL_TRANSFER_DIRECTION chTransferDirection
);
Description
This function selects the data transfer direction of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
chTransferDirection The transfer direction indicated by the DMA_CHANNEL_TRANSFER_DIRECTION
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_DMA_ChannelXTransferDirectionSelect (
DMA_ID_0,
DMA_CHANNEL_4,
DMA_READ_FROM_MEMORY_WRITE_TO_PERIPHERAL );
5.6.6.6.8.17 PLIB_DMA_ChannelXDisabledDisablesEvents Function
C
void PLIB_DMA_ChannelXDisabledDisablesEvents(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function will allow the channel start/abort events to be ignored even if the channel is disabled.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelXDisabled feature. This feature may not be available on all devices. Please
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refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXDisabled function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_ChannelXDisabledDisablesEvents ( DMA_ID_0, DMA_CHANNEL_2 );
5.6.6.6.8.18 PLIB_DMA_ChannelXDisabledEnablesEvents Function
C
void PLIB_DMA_ChannelXDisabledEnablesEvents(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function will allow the channel register start/abort events even if the channel is disabled.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelXDisabled feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXDisabled function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_ChannelXDisabledEnablesEvents ( DMA_ID_0, DMA_CHANNEL_2 );
5.6.6.6.8.19 PLIB_DMA_ChannelXPatternIgnoreByteDisable Function
C
void PLIB_DMA_ChannelXPatternIgnoreByteDisable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function disables the pattern match ignore byte.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
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Remarks
This function implements an operation of the ChannelXPatternIgnoreByte feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use the
PLIB_DMA_ExistsChannelXPatternIgnoreByte function in your application to automatically determine whether this feature is
available.
Example
DMA_CHANNEL dmaChannel = DMA_CHANNEL_2;
PLIB_DMA_ChannelXPatternIgnoreByteDisable(DMA_ID_0, dmaChannel);
5.6.6.6.8.20 PLIB_DMA_ChannelXPatternIgnoreByteEnable Function
C
void PLIB_DMA_ChannelXPatternIgnoreByteEnable(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function enables the pattern match ignore byte.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the ChannelXPatternIgnoreByte feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use the
PLIB_DMA_ExistsChannelXPatternIgnoreByte function in your application to automatically determine whether this feature is
available.
Example
DMA_CHANNEL dmaChannel = DMA_CHANNEL_2;
PLIB_DMA_ChannelXPatternIgnoreByteEnable(DMA_ID_0, dmaChannel);
5.6.6.6.8.21 PLIB_DMA_ChannelXPatternIgnoreByteIsEnabled Function
C
bool PLIB_DMA_ChannelXPatternIgnoreByteIsEnabled(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the state (enabled or disabled) of the pattern match ignore byte.
Preconditions
None.
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Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
• true - The pattern match ignore byte is enabled
• false - The pattern match ignore byte is disabled
Remarks
This function implements an operation of the ChannelXPatternIgnoreByte feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use the
PLIB_DMA_ExistsChannelXPatternIgnoreByte function in your application to automatically determine whether this feature is
available.
Example
bool patternIsEnabled;
DMA_CHANNEL dmaChannel = DMA_CHANNEL_2;
patternIsEnabled = PLIB_DMA_ChannelXPatternIgnoreByteIsEnabled(DMA_ID_0, dmaChannel);
5.6.6.6.8.22 PLIB_DMA_ChannelXPatternIgnoreGet Function
C
uint8_t PLIB_DMA_ChannelXPatternIgnoreGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the value of the pattern match ignore.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
uint8_t - Pattern match ignore value
Remarks
This function implements an operation of the ChannelXPatternIgnore feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXPatternIgnore
function in your application to automatically determine whether this feature is available.
Example
uint8_t patternMatch;
DMA_CHANNEL dmaChannel = DMA_CHANNEL_2;
patternMatch = PLIB_DMA_ChannelXPatternIgnoreGet ( DMA_ID_0, dmaChannel);
5.6.6.6.8.23 PLIB_DMA_ChannelXPatternIgnoreSet Function
C
void PLIB_DMA_ChannelXPatternIgnoreSet(
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DMA_MODULE_ID index,
DMA_CHANNEL channel,
uint8_t pattern
);
Description
This function sets the value of the pattern match ignore.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
pattern Pattern match ignore value
Returns
None.
Remarks
This function implements an operation of the ChannelXPatternIgnore feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXPatternIgnore
function in your application to automatically determine whether this feature is available.
Example
uint8_t patternMatch = 0x8;
DMA_CHANNEL dmaChannel = DMA_CHANNEL_2;
PLIB_DMA_ChannelXPatternIgnoreSet ( DMA_ID_0, dmaChannel,patternMatch);
5.6.6.6.8.24 PLIB_DMA_ChannelXPatternLengthGet Function
C
DMA_PATTERN_LENGTH PLIB_DMA_ChannelXPatternLengthGet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel
);
Description
This function returns the length of the byte matching the CHPIGN bits during a pattern match that may be ignored during the
pattern match determination when the CHPIGNEN bit is set.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
Returns
patternLen - Length of pattern match (either 1 or 2)
Remarks
This function implements an operation of the ChannelXPatternLength feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXPatternLength
function in your application to automatically determine whether this feature is available.
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Example
DMA_CHANNEL dmaChannel = DMA_CHANNEL_2;
DMA_PATTERN_LENGTH patternLen;
patternLen = PLIB_DMA_ChannelXPatternLengthGet(DMA_ID_0, dmaChannel);
5.6.6.6.8.25 PLIB_DMA_ChannelXPatternLengthSet Function
C
void PLIB_DMA_ChannelXPatternLengthSet(
DMA_MODULE_ID index,
DMA_CHANNEL dmaChannel,
DMA_PATTERN_LENGTH patternLen
);
Description
This function sets the length of the pattern match ignore to 1 or 2 bytes.
Preconditions
None.
Parameters
Parameters Description
dmaChannel One of the possible DMA channels listed by DMA_CHANNEL
patternLen Length of pattern match (either 1 or 2)
Returns
None.
Remarks
This function implements an operation of the ChannelXPatternLength feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXPatternLength
function in your application to automatically determine whether this feature is available.
Example
DMA_CHANNEL dmaChannel = DMA_CHANNEL_2;
DMA_PATTERN_LENGTH patternLen;
patternLen = DMA_PATTERN_MATCH_LENGTH_1BYTE;
PLIB_DMA_ChannelXPatternLengthSet(DMA_ID_0, dmaChannel, patternLen);
5.6.6.6.9 DMA CRC Module Interface Routines
5.6.6.6.9.1 PLIB_DMA_CRCAppendModeDisable Function
C
void PLIB_DMA_CRCAppendModeDisable(
DMA_MODULE_ID index
);
Description
This function disables the CRC append mode. The DMA transfers data from the source through the CRC obeying WBO (
DMA_MODULE_ID index, write byte order ) as it writes the data to the destination.
Preconditions
None.
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Returns
None.
Remarks
This function implements an operation of the CRCAppendMode feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCAppendMode function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_CRCAppendModeDisable( DMA_ID_0 );
5.6.6.6.9.2 PLIB_DMA_CRCAppendModeEnable Function
C
void PLIB_DMA_CRCAppendModeEnable(
DMA_MODULE_ID index
);
Description
This function enables the CRC append mode. The DMA transfers data from the source into the CRC, but not to the destination.
When a block transfer completes, the DMA writes the calculated CRC value to the location specified by the CHxDSA register.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the CRCAppendMode feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCAppendMode function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_CRCAppendModeEnable( DMA_ID_0 );
5.6.6.6.9.3 PLIB_DMA_CRCAppendModeIsEnabled Function
C
bool PLIB_DMA_CRCAppendModeIsEnabled(
DMA_MODULE_ID index
);
Description
This function gets the enable status of the CRC append mode.
Preconditions
None.
Returns
• true - CRC append mode is enabled
• false - CRC append mode is disabled
Remarks
This function implements an operation of the CRCAppendMode feature. This feature may not be available on all devices. Please
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refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCAppendMode function in your
application to automatically determine whether this feature is available.
Example
bool DMAcrcAppendMode;
DMAcrcAppendMode = PLIB_DMA_CRCAppendModeIsEnabled( DMA_ID_0 );
5.6.6.6.9.4 PLIB_DMA_CRCBitOrderSelect Function
C
void PLIB_DMA_CRCBitOrderSelect(
DMA_MODULE_ID index,
DMA_CRC_BIT_ORDER bitOrder
);
Description
This function selects the bit order for checksum caluculation.
Preconditions
None.
Parameters
Parameters Description
bitOrder Specifies the bit order for CRC caluculation
Returns
None.
Remarks
This function implements an operation of the CRCBitOrder feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCBitOrder function in your application
to automatically determine whether this feature is available.
Example
PLIB_DMA_CRCBitOrderSelect ( DMA_ID_0,DMA_CRC_BIT_ORDER_LSB );
5.6.6.6.9.5 PLIB_DMA_CRCByteOrderGet Function
C
DMA_CRC_BYTE_ORDER PLIB_DMA_CRCByteOrderGet(
DMA_MODULE_ID index
);
Description
This function gets the current byte order selected by the DMA module CRC feature.
Preconditions
The WBO bit must be set to use this function.
Returns
byteOrder - One of the possible byte orders specified by DMA_CRC_BYTE_ORDER
Remarks
This function implements an operation of the CRCByteOrder feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCByteOrder function in your
application to automatically determine whether this feature is available.
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Example
DMA_CRC_BYTE_ORDER byteOrder;
byteOrder = PLIB_DMA_CRCByteOrderGet ( DMA_ID_0 );
5.6.6.6.9.6 PLIB_DMA_CRCByteOrderSelect Function
C
void PLIB_DMA_CRCByteOrderSelect(
DMA_MODULE_ID index,
DMA_CRC_BYTE_ORDER byteOrder
);
Description
This function selects the byte order.
Preconditions
The WBO bit must be set to use this function.
Parameters
Parameters Description
byteOrder One of the possible byte orders specified by DMA_CRC_BYTE_ORDER
Returns
None.
Remarks
This function implements an operation of the CRCByteOrder feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCByteOrder function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_CRCByteOrderSelect ( DMA_ID_0,
DMA_CRC_SWAP_HALF_WORD_ON_WORD_BOUNDARY );
5.6.6.6.9.7 PLIB_DMA_CRCChannelGet Function
C
DMA_CHANNEL PLIB_DMA_CRCChannelGet(
DMA_MODULE_ID index
);
Description
This function returns the current DMA channel to which the CRC is assigned.
Preconditions
None.
Returns
crcChannel - One of the possible DMA channels listed by DMA_CHANNEL
Remarks
This function implements an operation of the CRCChannel feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCChannel function in your application
to automatically determine whether this feature is available.
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Example
DMA_CHANNEL crcChannel;
crcChannel = PLIB_DMA_CRCChannelGet( DMA_ID_0 );
5.6.6.6.9.8 PLIB_DMA_CRCChannelSelect Function
C
void PLIB_DMA_CRCChannelSelect(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function assigns the CRC feature to the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
None.
Remarks
This function implements an operation of the CRCChannel feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCChannel function in your application
to automatically determine whether this feature is available.
Example
PLIB_DMA_CRCChannelSelect( DMA_ID_0,
DMA_CHANNEL_5 );
5.6.6.6.9.9 PLIB_DMA_CRCDataRead Function
C
uint32_t PLIB_DMA_CRCDataRead(
DMA_MODULE_ID index
);
Description
This function reads the contents of the DMA CRC data register.
Preconditions
None.
Returns
uint32_t - 32-bit CRC data (The CRC data (16-bit, 32-bit) is device-specific. Please refer to the specific device data sheet to
determine availability.)
Remarks
This function implements an operation of the CRCData feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCData function in your application to
automatically determine whether this feature is available.
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Example
uint32_t DMACRCdata;
DMACRCdata = PLIB_DMA_CRCDataRead ( DMA_ID_0 );
5.6.6.6.9.10 PLIB_DMA_CRCDataWrite Function
C
void PLIB_DMA_CRCDataWrite(
DMA_MODULE_ID index,
uint32_t DMACRCdata
);
Description
This function writes the contents of the DMA CRC data register.
Preconditions
None.
Parameters
Parameters Description
DMACRCdata 32-bit CRC data (The CRC data (16-bit, 32-bit) is device-specific. Please refer to
the specific device data sheet to determine availability.)
Returns
None.
Remarks
This function implements an operation of the CRCData feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCData function in your application to
automatically determine whether this feature is available.
Example
uint32_t DMACRCdata = 0x0E0E0E;
PLIB_DMA_CRCDataWrite ( DMA_ID_0, DMACRCdata );
5.6.6.6.9.11 PLIB_DMA_CRCDisable Function
C
void PLIB_DMA_CRCDisable(
DMA_MODULE_ID index
);
Description
This function disables the DMA module CRC feature. The channel transfers proceed normally.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the CRC feature. This feature may not be available on all devices. Please refer to the
specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRC function in your application to automatically
determine whether this feature is available.
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Example
PLIB_DMA_CRCDisable( DMA_ID_0 );
5.6.6.6.9.12 PLIB_DMA_CRCEnable Function
C
void PLIB_DMA_CRCEnable(
DMA_MODULE_ID index
);
Description
This function enables the DMA module CRC feature. The channel transfers are routed through the CRC.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the CRC feature. This feature may not be available on all devices. Please refer to the
specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRC function in your application to automatically
determine whether this feature is available.
Example
PLIB_DMA_CRCEnable( DMA_ID_0 );
5.6.6.6.9.13 PLIB_DMA_CRCPolynomialLengthGet Function
C
uint8_t PLIB_DMA_CRCPolynomialLengthGet(
DMA_MODULE_ID index
);
Description
This function gets the current polynomial length.
Preconditions
None.
Returns
uint8_t - Polynomial length
Remarks
This function implements an operation of the CRCPolynomialLength feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCPolynomialLength
function in your application to automatically determine whether this feature is available.
Example
uint8_t polyLength;
polyLength = PLIB_DMA_CRCPolynomialLengthGet( DMA_ID_0 );
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5.6.6.6.9.14 PLIB_DMA_CRCPolynomialLengthSet Function
C
void PLIB_DMA_CRCPolynomialLengthSet(
DMA_MODULE_ID index,
uint8_t polyLength
);
Description
This function Selects the polynomial length.
Preconditions
None.
Parameters
Parameters Description
polyLength Polynomial length
Returns
None.
Remarks
This function implements an operation of the CRCPolynomialLength feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCPolynomialLength
function in your application to automatically determine whether this feature is available.
Example
uint8_t polyLength = 0x2;
PLIB_DMA_CRCPolynomialLengthSet( DMA_ID_0, polyLength );
5.6.6.6.9.15 PLIB_DMA_CRCTypeGet Function
C
DMA_CRC_TYPE PLIB_DMA_CRCTypeGet(
DMA_MODULE_ID index
);
Description
This function gets the DMA module CRC feature type. The CRC feature will compute either the IP header checksum or the
Linear Shift Feedback Register (LFSR) checksum.
Preconditions
None.
Returns
CRCType - One of the possible CRC checksums listed by DMA_CRC_TYPE.
Remarks
This function implements an operation of the CRCType feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCType function in your application to
automatically determine whether this feature is available.
Example
DMA_CRC_TYPE CRCType;
CRCType = PLIB_DMA_CRCTypeGet( DMA_ID_0 );
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5.6.6.6.9.16 PLIB_DMA_CRCTypeSet Function
C
void PLIB_DMA_CRCTypeSet(
DMA_MODULE_ID index,
DMA_CRC_TYPE CRCType
);
Description
This function selects the DMA module CRC feature type. The CRC feature will compute either the IP header checksum or the
Linear Shift Feedback Register (LFSR) checksum.
Preconditions
None.
Parameters
Parameters Description
CRCType One of the possible CRC checksums listed by DMA_CRC_TYPE
Returns
None.
Remarks
This function implements an operation of the CRCType feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCType function in your application to
automatically determine whether this feature is available.
Example
PLIB_DMA_CRCTypeSet(DMA_ID_0,
DMA_CRC_IP_HEADER );
5.6.6.6.9.17 PLIB_DMA_CRCWriteByteOrderAlter Function
C
void PLIB_DMA_CRCWriteByteOrderAlter(
DMA_MODULE_ID index
);
Description
This function enables byte order alteration as specified by the BYTO<1:0> bits. The source data is written to the destination
reordered as defined by the BYTO<1:0> bits.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the CRCWriteByteOrder feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCWriteByteOrder function
in your application to automatically determine whether this feature is available.
Example
PLIB_DMA_CRCWriteByteOrderAlter ( DMA_ID_0 );
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5.6.6.6.9.18 PLIB_DMA_CRCWriteByteOrderMaintain Function
C
void PLIB_DMA_CRCWriteByteOrderMaintain(
DMA_MODULE_ID index
);
Description
This function disables byte order alteration. The source data is written to the destination unaltered.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the CRCWriteByteOrder feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCWriteByteOrder function
in your application to automatically determine whether this feature is available.
Example
PLIB_DMA_CRCWriteByteOrderMaintain ( DMA_ID_0 );
5.6.6.6.9.19 PLIB_DMA_CRCXOREnableGet Function
C
uint32_t PLIB_DMA_CRCXOREnableGet(
DMA_MODULE_ID index
);
Description
This function reads the CRC XOR register.
Preconditions
None.
Returns
uint32_t - 32-bit CRC XOR enable mask data (The CRC data (16-bit, 32-bit) is device-specific. Please refer to the specific device
data sheet to determine availability.)
Remarks
This function implements an operation of the CRCXOREnable feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCXOREnable function in your
application to automatically determine whether this feature is available.
Example
uint32_t DMACRCXORdata;
DMACRCXORdata = PLIB_DMA_CRCXOREnableGet ( DMA_ID_0 );
5.6.6.6.9.20 PLIB_DMA_CRCXOREnableSet Function
C
void PLIB_DMA_CRCXOREnableSet(
DMA_MODULE_ID index,
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uint32_t DMACRCXOREnableMask
);
Description
This function writes to the CRC XOR enable register as per the specified enable mask. Each enabled bit will be taken as input to
the shift register.
Preconditions
None.
Parameters
Parameters Description
DMACRCXOREnableMask 32-bit CRC XOR enable mask data (The CRC data (16-bit, 32-bit) is
device-specific. Please refer to the specific device data sheet to determine
availability.)
Returns
None.
Remarks
This function implements an operation of the CRCXOREnable feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRCXOREnable function in your
application to automatically determine whether this feature is available.
Example
uint32_t DMACRCXOREnableMask = 0x05EFFFFF;
PLIB_DMA_CRCXOREnableSet ( DMA_ID_0, DMACRCXOREnableMask );
5.6.6.6.10 DMA Global Status Routines
5.6.6.6.10.1 PLIB_DMA_CRCIsEnabled Function
C
bool PLIB_DMA_CRCIsEnabled(
DMA_MODULE_ID index
);
Description
This function gets the enable status of the CRC feature.
Preconditions
None.
Returns
• true - The CRC feature is enabled
• false - The CRC feature is disabled
Remarks
This function implements an operation of the CRC feature. This feature may not be available on all devices. Please refer to the
specific device data sheet to determine availability or use the PLIB_DMA_ExistsCRC function in your application to automatically
determine whether this feature is available.
Example
bool DMAcrcStatus;
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DMAcrcStatus = PLIB_DMA_CRCIsEnabled( DMA_ID_0 );
5.6.6.6.10.2 PLIB_DMA_IsBusy Function
C
bool PLIB_DMA_IsBusy(
DMA_MODULE_ID index
);
Description
This function gets the BUSY bit of the DMA controller.
Preconditions
None.
Returns
• true - DMA module is active
• false - DMA module is disabled and is not actively transferring data
Remarks
This function implements an operation of the Busy feature. This feature may not be available on all devices. Please refer to the
specific device data sheet to determine availability or use the PLIB_DMA_ExistsBusy function in your application to automatically
determine whether this feature is available.
Example
bool dmaBusyStatus;
dmaBusyStatus = PLIB_DMA_IsBusy( DMA_ID_0 );
5.6.6.6.10.3 PLIB_DMA_IsEnabled Function
C
bool PLIB_DMA_IsEnabled(
DMA_MODULE_ID index
);
Description
This function returns the DMA module enable status.
Preconditions
None.
Returns
• true - The DMA is enabled
• false - The DMA is disabled
Remarks
This function implements an operation of the EnableControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsEnableControl function in your
application to automatically determine whether this feature is available.
Example
PLIB_DMA_IsEnabled( DMA_ID_0 );
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5.6.6.6.10.4 PLIB_DMA_LastBusAccessIsRead Function
C
bool PLIB_DMA_LastBusAccessIsRead(
DMA_MODULE_ID index
);
Description
This function returns true if the last DMA bus access was a read.
Preconditions
None.
Returns
• true - The last bus access was a read
• false - The last bus access was not a read
Remarks
This function implements an operation of the LastBusAccess feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsLastBusAccess function in your
application to automatically determine whether this feature is available.
Example
bool dmaLastBusAccessType;
dmaLastBusAccessType = PLIB_DMA_LastBusAccessIsRead( DMA_ID_0 );
5.6.6.6.10.5 PLIB_DMA_LastBusAccessIsWrite Function
C
bool PLIB_DMA_LastBusAccessIsWrite(
DMA_MODULE_ID index
);
Description
This function returns true if the last DMA bus access was a write operation.
Preconditions
None.
Returns
• true - The last bus access was a write operation
• false - The last bus access was not a write operation
Remarks
This function implements an operation of the LastBusAccess feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsLastBusAccess function in your
application to automatically determine whether this feature is available.
Example
bool dmaLastBusAccessType;
dmaLastBusAccessType = PLIB_DMA_LastBusAccessIsWrite( DMA_ID_0 );
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5.6.6.6.10.6 PLIB_DMA_LastChannelActive Function
C
DMA_CHANNEL PLIB_DMA_LastChannelActive(
DMA_MODULE_ID index
);
Description
This function returns the last DMA channel that participated in the data transfer.
Preconditions
None.
Returns
channel - One of the existing DMA channels listed by DMA_CHANNEL
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_CHANNEL lastActiveChannel;
lastActiveChannel = PLIB_DMA_LastChannelActive( DMA_ID_0 );
5.6.6.6.10.7 PLIB_DMA_RecentAddressAccessed Function
C
uint32_t PLIB_DMA_RecentAddressAccessed(
DMA_MODULE_ID index
);
Description
This function returns the address of the most recent DMA access.
Preconditions
None.
Returns
uint32_t - The most recent address accessed by the DMA
Remarks
This function implements an operation of the RecentAddress feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsRecentAddress function in your
application to automatically determine whether this feature is available.
Example
uint32_t dmaLastAddressAccessed;
dmaLastAddressAccessed = PLIB_DMA_RecentAddressAccessed( DMA_ID_0 );
5.6.6.6.10.8 PLIB_DMA_SuspendIsEnabled Function
C
bool PLIB_DMA_SuspendIsEnabled(
DMA_MODULE_ID index
);
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Description
This function returns the DMA suspend status.
Preconditions
None.
Returns
• true - The DMA transfers are suspended
• false - The DMA operates normally
Remarks
This function implements an operation of the Suspend feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsSuspend function in your application to
automatically determine whether this feature is available.
Example
bool dmaSuspendStatus;
dmaSuspendStatus = PLIB_DMA_SuspendIsEnabled( DMA_ID_0 );
5.6.6.6.11 DMA Channel Status Routines
5.6.6.6.11.1 PLIB_DMA_ChannelXAutoIsEnabled Function
C
bool PLIB_DMA_ChannelXAutoIsEnabled(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the channel automatic enable status.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
• true - Channel automatic enable is on
• false - Channel automatic enable is off
Remarks
This function implements an operation of the ChannelXAuto feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXAuto function in your
application to determine whether this feature is available.
Example
bool ChAutoEnableStatus;
ChAutoEnableStatus = PLIB_DMA_ChannelXAutoIsEnabled(DMA_ID_0,
DMA_CHANNEL_2 );
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5.6.6.6.11.2 PLIB_DMA_ChannelXBufferedDataIsWritten Function
C
bool PLIB_DMA_ChannelXBufferedDataIsWritten(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the buffered data write status for the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the existing DMA channels listed by DMA_CHANNEL
Returns
• true - The content of the DMA buffer has not been written to the location specified in the destination/source address or in Null
Write mode
• false - The content of the DMA buffer has been written to the location specified in the destination/source address or in Null
Write mode
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
bool chBuffWriteStatus;
chBuffWriteStatus = PLIB_DMA_ChannelXBufferedDataIsWritten( DMA_ID_0,
DMA_CHANNEL_3 );
5.6.6.6.11.3 PLIB_DMA_ChannelXBusyIsBusy Function
C
bool PLIB_DMA_ChannelXBusyIsBusy(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the busy status of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
• true - The channel is active or has been enabled
• false - The channel is inactive or has been disabled
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Remarks
This function implements an operation of the ChannelXBusy feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXBusy function in your
application to automatically determine whether this feature is available.
Example
bool chBusyStatus;
chBusyStatus = PLIB_DMA_ChannelXBusyIsBusy ( DMA_ID_0, DMA_CHANNEL_4 );
5.6.6.6.11.4 PLIB_DMA_ChannelXChainIsEnabled Function
C
bool PLIB_DMA_ChannelXChainIsEnabled(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the chain status of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
• true - The channel chain is on for this channel
• false - The channel chain is off for this channel
Remarks
This function implements an operation of the ChannelXChainEnbl feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelXChainEnbl function
in your application to determine whether this feature is available.
Example
bool ChchainStatus;
ChchainStatus = PLIB_DMA_ChannelXChainIsEnabled( DMA_ID_0, DMA_CHANNEL_2 );
5.6.6.6.11.5 PLIB_DMA_ChannelXCollisionStatus Function
C
bool PLIB_DMA_ChannelXCollisionStatus(
DMA_MODULE_ID index,
DMA_CHANNEL channel,
DMA_CHANNEL_COLLISION collisonType
);
Description
This function returns the status of the specified collison type for the specified channel.
Preconditions
None.
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Parameters
Parameters Description
channel One of the existing DMA channels listed by DMA_CHANNEL
collisonType Collision type listed by DMA_CHANNEL_COLLISION
Returns
• true - A collision specified by collisonType was detected
• false - No collision of type collisonType was detected
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
bool memWriteCollisionStatus;
memWriteCollisionStatus = PLIB_DMA_ChannelXMemoryWriteCollisionStatus(
DMA_ID_0,
DMA_CHANNEL_3,
DMA_CHANNEL_COLLISION_MEMORY );
5.6.6.6.11.6 PLIB_DMA_ChannelXEventIsDetected Function
C
bool PLIB_DMA_ChannelXEventIsDetected(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the event status on the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
• true - An event was detected
• false - No events were detected
Remarks
This function implements an operation of the ChannelXEvent feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or include the PLIB_DMA_ExistsChannelXEvent function in your
application to determine whether this feature is available.
Example
bool channeleventStatus;
channeleventStatus = PLIB_DMA_ChannelXEventIsDetected( DMA_ID_0,
DMA_CHANNEL_2 );
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5.6.6.6.11.7 PLIB_DMA_ChannelXIsEnabled Function
C
bool PLIB_DMA_ChannelXIsEnabled(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function will return the enable status of the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
• true - The specified DMA channel is enabled
• false - The specified DMA channel is disabled
Remarks
This function implements an operation of the ChannelX feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelX function in your application to
automatically determine whether this feature is available.
Example
bool chEnableStatus;
chEnableStatus = PLIB_DMA_ChannelXIsEnabled ( DMA_ID_0, DMA_CHANNEL_2 );
5.6.6.6.11.8 PLIB_DMA_ChannelXNullWriteModeIsEnabled Function
C
bool PLIB_DMA_ChannelXNullWriteModeIsEnabled(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the enable status of the Null Write mode for the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the possible DMA channels listed by DMA_CHANNEL
Returns
• true - Null write mode is enabled for this channel
• false - Null write mode is disabled for this channel
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Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
bool chNullWriteStatus;
chNullWriteStatus = PLIB_DMA_ChannelXNullWriteModeIsEnabled (
DMA_ID_0,
DMA_CHANNEL_4 );
5.6.6.6.11.9 PLIB_DMA_ChannelXPingPongModeGet Function
C
DMA_PING_PONG_MODE PLIB_DMA_ChannelXPingPongModeGet(
DMA_MODULE_ID index,
DMA_CHANNEL channel
);
Description
This function returns the Ping-Pong mode status for the specified channel.
Preconditions
None.
Parameters
Parameters Description
channel One of the existing DMA channels listed by DMA_CHANNEL
Returns
mode - One of the possible Ping-Pong modes
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
DMA_PING_PONG_MODE chPingPongStatus;
chPingPongStatus = PLIB_DMA_ChannelXPingPongModeGet(DMA_ID_0,
DMA_CHANNEL_3 );
if (DMA_PING_PONG_SECONDARY == chPingPongStatus)
{
\Application
}
5.6.6.6.11.10 PLIB_DMA_ChannelBitsGet Function
C
uint8_t PLIB_DMA_ChannelBitsGet(
DMA_MODULE_ID index
);
Description
This function returns the channel bits.
Preconditions
None.
Returns
uint8_t - DMA channel bits
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Remarks
This function implements an operation of the ChannelBits feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use the PLIB_DMA_ExistsChannelBits function in your application to
automatically determine whether this feature is available.
Example
uint8_t dmaChBits;
dmaChBits = PLIB_DMA_ChannelBitsGet( DMA_ID_0 );
5.6.6.6.12 Data Types and Constants
5.6.6.6.12.1 DMA_ADDRESS_OFFSET_TYPE Enumeration
C
typedef enum {
DMA_ADDRESS_OFFSET_PRIMARY,
DMA_ADDRESS_OFFSET_SECONDARY
} DMA_ADDRESS_OFFSET_TYPE;
Description
DMA address offsets
This enumeration lists all the possible DMA address offsets.
Members
Members Description
DMA_ADDRESS_OFFSET_PRIMARY address offset-A
DMA_ADDRESS_OFFSET_SECONDARY address offset-B
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.2 DMA_CHANNEL Enumeration
C
typedef enum {
DMA_CHANNEL_0,
DMA_CHANNEL_1,
DMA_CHANNEL_2,
DMA_CHANNEL_3,
DMA_CHANNEL_4,
DMA_CHANNEL_5,
DMA_CHANNEL_6,
DMA_CHANNEL_7
} DMA_CHANNEL;
Description
DMA channel
This enumeration lists all the possible DMA channels available.
Members
Members Description
DMA_CHANNEL_0 DMA Channel 0
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DMA_CHANNEL_1 DMA Channel 1
DMA_CHANNEL_2 DMA Channel 2
DMA_CHANNEL_3 DMA Channel 3
DMA_CHANNEL_4 DMA Channel 4
DMA_CHANNEL_5 DMA Channel 5
DMA_CHANNEL_6 DMA Channel 6
DMA_CHANNEL_7 DMA Channel 7
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.3 DMA_CHANNEL_ADDRESSING_MODE Enumeration
C
typedef enum {
DMA_ADDRESSING_REGISTER_INDIRECT_WITH_POST_INCREMENT,
DMA_ADDRESSING_REGISTER_INDIRECT_WITHOUT_POST_INCREMENT,
DMA_ADDRESSING_PERIPHERAL_INDIRECT
} DMA_CHANNEL_ADDRESSING_MODE;
Description
DMA channel addressing modes
This enumeration lists all the possible channel addressing modes.
Members
Members Description
DMA_ADDRESSING_REGISTER_INDIRECT_WITH_POST_INCREMENT register indirect with post increment
DMA_ADDRESSING_REGISTER_INDIRECT_WITHOUT_POST_INCREMENT register indirect without post increment
DMA_ADDRESSING_PERIPHERAL_INDIRECT peripheral indirect addressing
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.4 DMA_CHANNEL_COLLISION Enumeration
C
typedef enum {
DMA_CHANNEL_COLLISION_MEMORY,
DMA_CHANNEL_COLLISION_PERIPHERAL,
DMA_CHANNEL_COLLISION_TRANSFER_REQUEST
} DMA_CHANNEL_COLLISION;
Description
DMA channel collison types
This enumeration lists all the possible channel collison types.
Members
Members Description
DMA_CHANNEL_COLLISION_MEMORY Memory Write Collision
DMA_CHANNEL_COLLISION_PERIPHERAL Peripheral Write collison
DMA_CHANNEL_COLLISION_TRANSFER_REQUEST Transfer request collision
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Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.5 DMA_CHANNEL_DATA_SIZE Enumeration
C
typedef enum {
DMA_CHANNEL_DATA_8,
DMA_CHANNEL_DATA_16
} DMA_CHANNEL_DATA_SIZE;
Description
DMA channel data size
This enumeration lists all the possible data sizes for the DMA channels.
Members
Members Description
DMA_CHANNEL_DATA_8 8 bit data size
DMA_CHANNEL_DATA_16 16 bit data size
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.6 DMA_CHANNEL_PRIORITY Enumeration
C
typedef enum {
DMA_CHANNEL_PRIORITY_0,
DMA_CHANNEL_PRIORITY_1,
DMA_CHANNEL_PRIORITY_2,
DMA_CHANNEL_PRIORITY_3,
DMA_CHANNEL_ROUND_ROBIN,
DMA_CHANNEL_FIXED_PRIORITY
} DMA_CHANNEL_PRIORITY;
Description
DMA channel priority types
This enumeration lists all the possible channel priorities.
Members
Members Description
DMA_CHANNEL_PRIORITY_0 priority 0
DMA_CHANNEL_PRIORITY_1 priority 1
DMA_CHANNEL_PRIORITY_2 priority 2
DMA_CHANNEL_PRIORITY_3 priority 3
DMA_CHANNEL_ROUND_ROBIN round-robin scheme
DMA_CHANNEL_FIXED_PRIORITY fixed priority scheme
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
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5.6.6.6.12.7 DMA_CHANNEL_TRANSFER_DIRECTION Enumeration
C
typedef enum {
DMA_READ_FROM_MEMORY_WRITE_TO_PERIPHERAL,
DMA_READ_FROM_PERIPHERAL_WRITE_TO_MEMORY,
DMA_READ_FROM_MEMORY_WRITE_TO_MEMORY,
DMA_READ_FROM_PERIPHERAL_WRITE_TO_PERIPHERAL
} DMA_CHANNEL_TRANSFER_DIRECTION;
Description
DMA channel data transfer direction
This enumeration lists all the possible data transfer directions.
Members
Members Description
DMA_READ_FROM_MEMORY_WRITE_TO_PERIPHERAL DMA transfer happens from the memory to peripheral
DMA_READ_FROM_PERIPHERAL_WRITE_TO_MEMORY DMA transfer happens from the peripheral to memory
DMA_READ_FROM_MEMORY_WRITE_TO_MEMORY DMA transfer happens from the memory to memory
DMA_READ_FROM_PERIPHERAL_WRITE_TO_PERIPHERAL DMA transfer happens from the peripheral to peripheral
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.8 DMA_CHANNEL_TRIGGER_TYPE Enumeration
C
typedef enum {
DMA_CHANNEL_TRIGGER_TRANSFER_START,
DMA_CHANNEL_TRIGGER_TRANSFER_ABORT,
DMA_CHANNEL_TRIGGER_PATTERN_MATCH_ABORT
} DMA_CHANNEL_TRIGGER_TYPE;
Description
DMA trigger types
This enumeration lists all the possible DMA channel triggers.
Members
Members Description
DMA_CHANNEL_TRIGGER_TRANSFER_START Trigger for DMA transfer start
DMA_CHANNEL_TRIGGER_TRANSFER_ABORT Trigger for DMA transfer abort
DMA_CHANNEL_TRIGGER_PATTERN_MATCH_ABORT Trigger for DMA transfer abort via pattern match
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.9 DMA_CRC_BIT_ORDER Enumeration
C
typedef enum {
DMA_CRC_BIT_ORDER_LSB,
DMA_CRC_BIT_ORDER_MSB
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} DMA_CRC_BIT_ORDER;
Description
DMA CRC caluculation bit order
This enumeration lists all the possible CRC caluculation bit orders
Members
Members Description
DMA_CRC_BIT_ORDER_LSB CRC is caluculated least significant bit first
DMA_CRC_BIT_ORDER_MSB CRC is caluculated most significant bit first
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.10 DMA_CRC_BYTE_ORDER Enumeration
C
typedef enum {
DMA_CRC_BYTEORDER_NO_SWAPPING,
DMA_CRC_SWAP_BYTE_ON_WORD_BOUNDARY,
DMA_CRC_SWAP_HALF_WORD_ON_WORD_BOUNDARY,
DMA_CRC_SWAP_BYTE_ON_HALF_WORD_BOUNDARY
} DMA_CRC_BYTE_ORDER;
Description
CRC Byte order type
This enumeration lists all the possible byte orders handled by CRC module.
Members
Members Description
DMA_CRC_BYTEORDER_NO_SWAPPING No swapping, Source byte order
DMA_CRC_SWAP_BYTE_ON_WORD_BOUNDARY Endian byte swap on word boundaries ( reverse source byte
order )
DMA_CRC_SWAP_HALF_WORD_ON_WORD_BOUNDARY Swap half-words on word boundaries ( reverse source half-word
order with source byte order per half-word )
DMA_CRC_SWAP_BYTE_ON_HALF_WORD_BOUNDARY Endian byte swap on half-word boundaries ( reverse source
half-word order with reverse source byte order per half-word )
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.11 DMA_CRC_TYPE Enumeration
C
typedef enum {
DMA_CRC_IP_HEADER,
DMA_CRC_LFSR
} DMA_CRC_TYPE;
Description
CRC type
This enumeration lists all the possible checksums handled by CRC module.
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Members
Members Description
DMA_CRC_IP_HEADER CRC module will caluculate IP header checksum
DMA_CRC_LFSR CRC module will caluculate Linear Feedback Shift Registers checksum
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.12 DMA_DESTINATION_ADDRESSING_MODE Enumeration
C
typedef enum {
DMA_ADDRESSING_DESTINATION_UNCHANGED,
DMA_ADDRESSING_DESTINATION_INCREMENT_BASED_ON_SIZE,
DMA_ADDRESSING_DESTINATION_DECREMENT_BASED_ON_SIZE,
DMA_ADDRESSING_DESTINATION_PERIPHERAL_INDIRECT
} DMA_DESTINATION_ADDRESSING_MODE;
Description
DMA destination addressing modes
This enumeration lists all the possible destination addressing modes.
Members
Members Description
DMA_ADDRESSING_DESTINATION_UNCHANGED DMADST remains unchanged after a transfer
completion
DMA_ADDRESSING_DESTINATION_INCREMENT_BASED_ON_SIZE DMADST is incremented based on SIZE bit after a
transfer completion
DMA_ADDRESSING_DESTINATION_DECREMENT_BASED_ON_SIZE DMADST is decremented based on SIZE bit after a
transfer completion
DMA_ADDRESSING_DESTINATION_PERIPHERAL_INDIRECT DMADST is used in peripheral indirect addressing
and remains unchanged
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.13 DMA_INT_TYPE Enumeration
C
typedef enum {
DMA_INT_ADDRESS_ERROR,
DMA_INT_TRANSFER_ABORT,
DMA_INT_CELL_TRANSFER_COMPLETE,
DMA_INT_BLOCK_TRANSFER_COMPLETE,
DMA_INT_DESTINATION_HALF_FULL,
DMA_INT_DESTINATION_DONE,
DMA_INT_SOURCE_HALF_EMPTY,
DMA_INT_SOURCE_DONE,
DMA_INT_COUNT_HALF_DONE,
DMA_INT_CHANNEL_OVERRUN,
DMA_INT_COMPLETE,
DMA_INT_LOW_ADDRESS_LIMIT,
DMA_INT_HIGH_ADDRESS_LIMIT
} DMA_INT_TYPE;
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Description
DMA channel X interrupt types
This enumeration lists all the possible interrupt types for a channel. Not to be confused with the DMA trigger/abort interrupt
sources (supported only for few parts).
Members
Members Description
DMA_INT_ADDRESS_ERROR Channel address error interrupt
DMA_INT_TRANSFER_ABORT channel transfer abort interrupt
DMA_INT_CELL_TRANSFER_COMPLETE channel cell transfer complete
DMA_INT_BLOCK_TRANSFER_COMPLETE Channel block transfer complete
DMA_INT_DESTINATION_HALF_FULL Channel destination half full interrupt
DMA_INT_DESTINATION_DONE Channel destination done interrupt
DMA_INT_SOURCE_HALF_EMPTY Channel source half empty interrupt
DMA_INT_SOURCE_DONE Channel source done interrupt
DMA_INT_COUNT_HALF_DONE DMA count has reached its halfway
DMA_INT_CHANNEL_OVERRUN channel overrun. channel is triggered while it is still completing the operation
based on the previous trigger
DMA_INT_COMPLETE DMA complete operation interrupt
DMA_INT_LOW_ADDRESS_LIMIT DMA low address limit interrupt
DMA_INT_HIGH_ADDRESS_LIMIT DMA high address limit interrupt
Remarks
Not to be confused with the DMA trigger/abort interrupt sources (supported only for few parts). This enumeration is processor
specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.14 DMA_MODULE_ID Enumeration
C
typedef enum {
DMA_ID_0
} DMA_MODULE_ID;
Description
DMA module ID
This data type defines the possible instances of the DMA module.
Members
Members Description
DMA_ID_0 first instance of the DMA
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.15 DMA_PATTERN_LENGTH Enumeration
C
typedef enum {
DMA_PATTERN_MATCH_LENGTH_1BYTE,
5.6 Peripheral Library Help MPLAB Harmony Help DMA Peripheral Library Help
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DMA_PATTERN_MATCH_LENGTH_2BYTES
} DMA_PATTERN_LENGTH;
Description
DMA pattern length
This enumeration gives the length of the pattern to be matched with CHPIGN<7:0> in DCHxCON<31:24.
Members
Members Description
DMA_PATTERN_MATCH_LENGTH_1BYTE The Length of matching pattern with CHPIGN<7:0> in DCHxCON<31:24> is 1
BYTE
DMA_PATTERN_MATCH_LENGTH_2BYTES The Length of matching pattern with CHPIGN<7:0> in DCHxCON<31:24> is 2
BYTES
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.16 DMA_PING_PONG_MODE Enumeration
C
typedef enum {
DMA_PING_PONG_PRIMARY,
DMA_PING_PONG_SECONDARY
} DMA_PING_PONG_MODE;
Description
DMA PING-PONG modes
This enumeration lists all the possible ping-pong modes.
Members
Members Description
DMA_PING_PONG_PRIMARY DMAxSTA is selected in the ping-pong mode
DMA_PING_PONG_SECONDARY DMAxSTB is selected in the ping-pong mode
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.17 DMA_SOURCE_ADDRESSING_MODE Enumeration
C
typedef enum {
DMA_ADDRESSING_SOURCE_UNCHANGED,
DMA_ADDRESSING_SOURCE_INCREMENT_BASED_ON_SIZE,
DMA_ADDRESSING_SOURCE_DECREMENT_BASED_ON_SIZE,
DMA_ADDRESSING_SOURCE_PERIPHERAL_INDIRECT
} DMA_SOURCE_ADDRESSING_MODE;
Description
DMA source addressing modes
This enumeration lists all the possible source addressing modes.
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Members
Members Description
DMA_ADDRESSING_SOURCE_UNCHANGED DMASRC remains unchanged after a transfer completion
DMA_ADDRESSING_SOURCE_INCREMENT_BASED_ON_SIZE DMASRC is incremented based on SIZE bit after a transfer
completion
DMA_ADDRESSING_SOURCE_DECREMENT_BASED_ON_SIZE DMASRC is decremented based on SIZE bit after a
transfer completion
DMA_ADDRESSING_SOURCE_PERIPHERAL_INDIRECT DMASRC is used in peripheral indirect addressing and
remains unchanged
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.18 DMA_TRANSFER_MODE Enumeration
C
typedef enum {
DMA_MODE_ONE_SHOT,
DMA_MODE_REPEATED_ONE_SHOT,
DMA_MODE_CONTINUOUS,
DMA_MODE_REPEATED_CONTINUOUS,
DMA_MODE_ONE_SHOT_PING_PONG_ENABLED,
DMA_MODE_ONE_SHOT_PING_PONG_DISABLED,
DMA_MODE_CONTINUOUS_PING_PONG_DISABLED,
DMA_MODE_CONTINUOUS_PING_PONG_ENABLED
} DMA_TRANSFER_MODE;
Description
DMA transfer/operating mode
This enumeration lists the possible DMA transfer/operating modes.
Members
Members Description
DMA_MODE_ONE_SHOT one-shot transfer
DMA_MODE_REPEATED_ONE_SHOT repeated one-shot transfer
DMA_MODE_CONTINUOUS continuous transfer
DMA_MODE_REPEATED_CONTINUOUS repeated continuous transfer
DMA_MODE_ONE_SHOT_PING_PONG_ENABLED one-shot transfer with ping-pong buffers
DMA_MODE_ONE_SHOT_PING_PONG_DISABLED one-shot transfer without the ping-pong buffers
DMA_MODE_CONTINUOUS_PING_PONG_DISABLED continuous transfer without the ping-pong buffers
DMA_MODE_CONTINUOUS_PING_PONG_ENABLED continuous transfer with ping-pong buffers
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.12.19 DMA_TRIGGER_SOURCE Enumeration
C
typedef enum {
DMA_TRIGGER_TIMER_CORE,
DMA_TRIGGER_SOFTWARE_0,
DMA_TRIGGER_SOFTWARE_1,
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DMA_TRIGGER_EXTERNAL_0
,
DMA_TRIGGER_EXTERNAL_1
,
DMA_TRIGGER_EXTERNAL_2
,
DMA_TRIGGER_EXTERNAL_3
,
DMA_TRIGGER_EXTERNAL_4
,
DMA_TRIGGER_TIMER_1
,
DMA_TRIGGER_TIMER_2
,
DMA_TRIGGER_TIMER_3
,
DMA_TRIGGER_TIMER_4
,
DMA_TRIGGER_TIMER_5
,
DMA_TRIGGER_INPUT_CAPTURE_1
,
DMA_TRIGGER_INPUT_CAPTURE_2
,
DMA_TRIGGER_INPUT_CAPTURE_3
,
DMA_TRIGGER_INPUT_CAPTURE_4
,
DMA_TRIGGER_INPUT_CAPTURE_5
,
DMA_TRIGGER_INPUT_CAPTURE_1_ERROR
,
DMA_TRIGGER_INPUT_CAPTURE_2_ERROR
,
DMA_TRIGGER_INPUT_CAPTURE_3_ERROR
,
DMA_TRIGGER_INPUT_CAPTURE_4_ERROR
,
DMA_TRIGGER_INPUT_CAPTURE_5_ERROR
,
DMA_TRIGGER_OUTPUT_COMPARE_1
,
DMA_TRIGGER_OUTPUT_COMPARE_2
,
DMA_TRIGGER_OUTPUT_COMPARE_3
,
DMA_TRIGGER_OUTPUT_COMPARE_4
,
DMA_TRIGGER_OUTPUT_COMPARE_5
,
DMA_TRIGGER_SPI_1_ERROR
,
DMA_TRIGGER_SPI_1_RECEIVE
,
DMA_TRIGGER_SPI_1_TRANSMIT
,
DMA_TRIGGER_SPI_1A_ERROR
,
DMA_TRIGGER_SPI_1A_RECEIVE
,
DMA_TRIGGER_SPI_1A_TRANSMIT
,
DMA_TRIGGER_SPI_2_ERROR
,
DMA_TRIGGER_SPI_2_RECEIVE
,
DMA_TRIGGER_SPI_2_TRANSMIT
,
DMA_TRIGGER_SPI_2A_ERROR
,
DMA_TRIGGER_SPI_2A_RECEIVE
,
DMA_TRIGGER_SPI_2A_TRANSMIT
,
DMA_TRIGGER_SPI_3_ERROR
,
DMA_TRIGGER_SPI_3_RECEIVE
,
DMA_TRIGGER_SPI_3_TRANSMIT
,
DMA_TRIGGER_SPI_3A_ERROR
,
DMA_TRIGGER_SPI_3A_RECEIVE
,
DMA_TRIGGER_SPI_3A_TRANSMIT
,
DMA_TRIGGER_SPI_4_ERROR
,
DMA_TRIGGER_SPI_4_RECEIVE
,
DMA_TRIGGER_SPI_4_TRANSMIT
,
DMA_TRIGGER_I2C_1_ERROR
,
DMA_TRIGGER_I2C_1_SLAVE
,
DMA_TRIGGER_I2C_1_MASTER
,
DMA_TRIGGER_I2C_1A_ERROR
,
DMA_TRIGGER_I2C_1A_SLAVE
,
DMA_TRIGGER_I2C_1A_MASTER
,
DMA_TRIGGER_I2C_2_ERROR
,
DMA_TRIGGER_I2C_2_SLAVE
,
DMA_TRIGGER_I2C_2_MASTER
,
DMA_TRIGGER_I2C_2A_ERROR
,
DMA_TRIGGER_I2C_2A_SLAVE
,
DMA_TRIGGER_I2C_2A_MASTER
,
DMA_TRIGGER_I2C_3_ERROR
,
DMA_TRIGGER_I2C_3_SLAVE
,
DMA_TRIGGER_I2C_3_MASTER
,
DMA_TRIGGER_I2C_3A_ERROR
,
DMA_TRIGGER_I2C_3A_SLAVE
,
DMA_TRIGGER_I2C_3A_MASTER
,
DMA_TRIGGER_I2C_4_ERROR
,
DMA_TRIGGER_I2C_4_SLAVE
,
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DMA_TRIGGER_I2C_4_MASTER
,
DMA_TRIGGER_I2C_5_ERROR
,
DMA_TRIGGER_I2C_5_SLAVE
,
DMA_TRIGGER_I2C_5_MASTER
,
DMA_TRIGGER_USART_1_ERROR
,
DMA_TRIGGER_USART_1_RECEIVE
,
DMA_TRIGGER_USART_1_TRANSMIT
,
DMA_TRIGGER_USART_1A_ERROR
,
DMA_TRIGGER_USART_1A_RECEIVE
,
DMA_TRIGGER_USART_1A_TRANSMIT
,
DMA_TRIGGER_USART_1B_ERROR
,
DMA_TRIGGER_USART_1B_RECEIVE
,
DMA_TRIGGER_USART_1B_TRANSMIT
,
DMA_TRIGGER_USART_2_ERROR
,
DMA_TRIGGER_USART_2_RECEIVE
,
DMA_TRIGGER_USART_2_TRANSMIT
,
DMA_TRIGGER_USART_2A_ERROR
,
DMA_TRIGGER_USART_2A_RECEIVE
,
DMA_TRIGGER_USART_2A_TRANSMIT
,
DMA_TRIGGER_USART_2B_ERROR
,
DMA_TRIGGER_USART_2B_RECEIVE
,
DMA_TRIGGER_USART_2B_TRANSMIT
,
DMA_TRIGGER_USART_3_ERROR
,
DMA_TRIGGER_USART_3_RECEIVE
,
DMA_TRIGGER_USART_3_TRANSMIT
,
DMA_TRIGGER_USART_3A_ERROR
,
DMA_TRIGGER_USART_3A_RECEIVE
,
DMA_TRIGGER_USART_3A_TRANSMIT
,
DMA_TRIGGER_USART_3B_ERROR
,
DMA_TRIGGER_USART_3B_RECEIVE
,
DMA_TRIGGER_USART_3B_TRANSMIT
,
DMA_TRIGGER_USART_4_ERROR
,
DMA_TRIGGER_USART_4_RECEIVE
,
DMA_TRIGGER_USART_4_TRANSMIT
,
DMA_TRIGGER_USART_5_ERROR
,
DMA_TRIGGER_USART_5_RECEIVE
,
DMA_TRIGGER_USART_5_TRANSMIT
,
DMA_TRIGGER_USART_6_ERROR
,
DMA_TRIGGER_USART_6_RECEIVE
,
DMA_TRIGGER_USART_6_TRANSMIT
,
DMA_TRIGGER_CHANGE_NOTICE
,
DMA_TRIGGER_CHANGE_NOTICE_A
,
DMA_TRIGGER_CHANGE_NOTICE_B
,
DMA_TRIGGER_CHANGE_NOTICE_C
,
DMA_TRIGGER_CHANGE_NOTICE_D
,
DMA_TRIGGER_CHANGE_NOTICE_E
,
DMA_TRIGGER_CHANGE_NOTICE_F
,
DMA_TRIGGER_CHANGE_NOTICE_G
,
DMA_TRIGGER_DMA_0
,
DMA_TRIGGER_DMA_1
,
DMA_TRIGGER_DMA_2
,
DMA_TRIGGER_DMA_3
,
DMA_TRIGGER_DMA_4
,
DMA_TRIGGER_DMA_5
,
DMA_TRIGGER_DMA_6
,
DMA_TRIGGER_DMA_7
,
DMA_TRIGGER_COMPARATOR_1
,
DMA_TRIGGER_COMPARATOR_2
,
DMA_TRIGGER_COMPARATOR_3
,
DMA_TRIGGER_ADC_1
,
DMA_TRIGGER_PARALLEL_PORT
,
DMA_TRIGGER_CAN_1
,
DMA_TRIGGER_CAN_2
,
DMA_TRIGGER_CLOCK_MONITOR
,
DMA_TRIGGER_RTCC
,
DMA_TRIGGER_FLASH_CONTROL
,
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DMA_TRIGGER_USB_1,
DMA_TRIGGER_ETH_1,
DMA_TRIGGER_PARALLEL_PORT_ERROR,
DMA_TRIGGER_CTMU
} DMA_TRIGGER_SOURCE;
Description
DMA trigger sources
This enumeration lists all the possible DMA trigger sources.
Members
Members Description
DMA_TRIGGER_TIMER_CORE Core timer
DMA_TRIGGER_SOFTWARE_0 Software 0
DMA_TRIGGER_SOFTWARE_1 Software 1
DMA_TRIGGER_EXTERNAL_0 External 0
DMA_TRIGGER_EXTERNAL_1 External 1
DMA_TRIGGER_EXTERNAL_2 External 2
DMA_TRIGGER_EXTERNAL_3 External 3
DMA_TRIGGER_EXTERNAL_4 External 4
DMA_TRIGGER_TIMER_1 Timer 1
DMA_TRIGGER_TIMER_2 Timer 2
DMA_TRIGGER_TIMER_3 Timer 3
DMA_TRIGGER_TIMER_4 Timer 4
DMA_TRIGGER_TIMER_5 Timer 5
DMA_TRIGGER_INPUT_CAPTURE_1 Input Capture 1
DMA_TRIGGER_INPUT_CAPTURE_2 Input Capture 2
DMA_TRIGGER_INPUT_CAPTURE_3 Input Capture 3
DMA_TRIGGER_INPUT_CAPTURE_4 Input Capture 4
DMA_TRIGGER_INPUT_CAPTURE_5 Input Capture 5
DMA_TRIGGER_INPUT_CAPTURE_1_ERROR Input Capture 1 error
DMA_TRIGGER_INPUT_CAPTURE_2_ERROR Input Capture 2 error
DMA_TRIGGER_INPUT_CAPTURE_3_ERROR Input Capture 3 error
DMA_TRIGGER_INPUT_CAPTURE_4_ERROR Input Capture 4 error
DMA_TRIGGER_INPUT_CAPTURE_5_ERROR Input Capture 5 error
DMA_TRIGGER_OUTPUT_COMPARE_1 Output compare 1
DMA_TRIGGER_OUTPUT_COMPARE_2 Output compare 2
DMA_TRIGGER_OUTPUT_COMPARE_3 Output compare 3
DMA_TRIGGER_OUTPUT_COMPARE_4 Output compare 4
DMA_TRIGGER_OUTPUT_COMPARE_5 Output compare 5
DMA_TRIGGER_SPI_1_ERROR SPI 1 error
DMA_TRIGGER_SPI_1_RECEIVE SPI 1 receive
DMA_TRIGGER_SPI_1_TRANSMIT SPI 1 transmit
DMA_TRIGGER_SPI_1A_ERROR SPI 1A error
DMA_TRIGGER_SPI_1A_RECEIVE SPI 1A receive
DMA_TRIGGER_SPI_1A_TRANSMIT SPI 1A transmit
DMA_TRIGGER_SPI_2_ERROR SPI 2 erro
DMA_TRIGGER_SPI_2_RECEIVE SPI 2 receive
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DMA_TRIGGER_SPI_2_TRANSMIT SPI 2 transmit
DMA_TRIGGER_SPI_2A_ERROR SPI 2A receive
DMA_TRIGGER_SPI_2A_RECEIVE SPI 2A receive
DMA_TRIGGER_SPI_2A_TRANSMIT SPI 2A transmit
DMA_TRIGGER_SPI_3_ERROR SPI 3 error
DMA_TRIGGER_SPI_3_RECEIVE SPI 3 receive
DMA_TRIGGER_SPI_3_TRANSMIT SPI 3 transmit
DMA_TRIGGER_SPI_3A_ERROR SPI 3A receive
DMA_TRIGGER_SPI_3A_RECEIVE SPI 3A receive
DMA_TRIGGER_SPI_3A_TRANSMIT SPI 3A receive
DMA_TRIGGER_SPI_4_ERROR SPI 4 error
DMA_TRIGGER_SPI_4_RECEIVE SPI 4 receive
DMA_TRIGGER_SPI_4_TRANSMIT SPI 4 transmit
DMA_TRIGGER_I2C_1_ERROR I2C 1 error
DMA_TRIGGER_I2C_1_SLAVE I2C 1 slave
DMA_TRIGGER_I2C_1_MASTER I2C 1 master
DMA_TRIGGER_I2C_1A_ERROR I2C 1A error
DMA_TRIGGER_I2C_1A_SLAVE I2C 1A slave
DMA_TRIGGER_I2C_1A_MASTER I2C 1A master
DMA_TRIGGER_I2C_2_ERROR I2C 2 error
DMA_TRIGGER_I2C_2_SLAVE I2C 2 slave
DMA_TRIGGER_I2C_2_MASTER I2C 2 master
DMA_TRIGGER_I2C_2A_ERROR I2C 2A error
DMA_TRIGGER_I2C_2A_SLAVE I2C 2A slave
DMA_TRIGGER_I2C_2A_MASTER I2C 2A master
DMA_TRIGGER_I2C_3_ERROR I2C 3 error
DMA_TRIGGER_I2C_3_SLAVE I2C 3 slave
DMA_TRIGGER_I2C_3_MASTER I2C 3 master
DMA_TRIGGER_I2C_3A_ERROR I2C 3A error
DMA_TRIGGER_I2C_3A_SLAVE I2C 3A slave
DMA_TRIGGER_I2C_3A_MASTER I2C 3A master
DMA_TRIGGER_I2C_4_ERROR I2C 4 error
DMA_TRIGGER_I2C_4_SLAVE I2C 4 slave
DMA_TRIGGER_I2C_4_MASTER I2C 4 master
DMA_TRIGGER_I2C_5_ERROR I2C 5 error
DMA_TRIGGER_I2C_5_SLAVE I2C 5 slave
DMA_TRIGGER_I2C_5_MASTER I2C 5 master
DMA_TRIGGER_USART_1_ERROR USART 1 error
DMA_TRIGGER_USART_1_RECEIVE USART 1 receive
DMA_TRIGGER_USART_1_TRANSMIT USART 1 transmit
DMA_TRIGGER_USART_1A_ERROR USART 1A error
DMA_TRIGGER_USART_1A_RECEIVE USART 1A receive
DMA_TRIGGER_USART_1A_TRANSMIT USART 1A transmit
DMA_TRIGGER_USART_1B_ERROR USART 1B error
DMA_TRIGGER_USART_1B_RECEIVE USART 1B receive
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DMA_TRIGGER_USART_1B_TRANSMIT USART 1B transmit
DMA_TRIGGER_USART_2_ERROR USART 2 error
DMA_TRIGGER_USART_2_RECEIVE USART 2 receive
DMA_TRIGGER_USART_2_TRANSMIT USART 2 transmit
DMA_TRIGGER_USART_2A_ERROR USART 2A error
DMA_TRIGGER_USART_2A_RECEIVE USART 2A receive
DMA_TRIGGER_USART_2A_TRANSMIT USART 2A transmit
DMA_TRIGGER_USART_2B_ERROR USART 2B error
DMA_TRIGGER_USART_2B_RECEIVE USART 2B receive
DMA_TRIGGER_USART_2B_TRANSMIT USART 2B transmit
DMA_TRIGGER_USART_3_ERROR USART 3 error
DMA_TRIGGER_USART_3_RECEIVE USART 3 receive
DMA_TRIGGER_USART_3_TRANSMIT USART 3 transmit
DMA_TRIGGER_USART_3A_ERROR USART 3A error
DMA_TRIGGER_USART_3A_RECEIVE USART 3A receive
DMA_TRIGGER_USART_3A_TRANSMIT USART 3A transmit
DMA_TRIGGER_USART_3B_ERROR USART 3B error
DMA_TRIGGER_USART_3B_RECEIVE USART 3B receieve
DMA_TRIGGER_USART_3B_TRANSMIT USART 3B transmit
DMA_TRIGGER_USART_4_ERROR USART 4 error
DMA_TRIGGER_USART_4_RECEIVE USART 3B receive
DMA_TRIGGER_USART_4_TRANSMIT USART 4 transmit
DMA_TRIGGER_USART_5_ERROR USART 5 error
DMA_TRIGGER_USART_5_RECEIVE USART 5 receive
DMA_TRIGGER_USART_5_TRANSMIT USART 5 transmit
DMA_TRIGGER_USART_6_ERROR USART 6 error
DMA_TRIGGER_USART_6_RECEIVE USART 6 receive
DMA_TRIGGER_USART_6_TRANSMIT USART 6 transmit
DMA_TRIGGER_CHANGE_NOTICE Change notice
DMA_TRIGGER_CHANGE_NOTICE_A Change notice A
DMA_TRIGGER_CHANGE_NOTICE_B Change notice B
DMA_TRIGGER_CHANGE_NOTICE_C Change notice C
DMA_TRIGGER_CHANGE_NOTICE_D Change notice D
DMA_TRIGGER_CHANGE_NOTICE_E Change notice E
DMA_TRIGGER_CHANGE_NOTICE_F Change notice F
DMA_TRIGGER_CHANGE_NOTICE_G Change notice G
DMA_TRIGGER_DMA_0 DMA Channel 0
DMA_TRIGGER_DMA_1 DMA Channel 1
DMA_TRIGGER_DMA_2 DMA Channel 2
DMA_TRIGGER_DMA_3 DMA Channel 3
DMA_TRIGGER_DMA_4 DMA Channel 4
DMA_TRIGGER_DMA_5 DMA Channel 5
DMA_TRIGGER_DMA_6 DMA Channel 6
DMA_TRIGGER_DMA_7 DMA Channel 7
DMA_TRIGGER_COMPARATOR_1 Comparator 1
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DMA_TRIGGER_COMPARATOR_2 DMA Channel 2
DMA_TRIGGER_COMPARATOR_3 DMA Channel 3
DMA_TRIGGER_ADC_1 ADC 1
DMA_TRIGGER_PARALLEL_PORT Parallel port
DMA_TRIGGER_CAN_1 CAN 1
DMA_TRIGGER_CAN_2 CAN 2
DMA_TRIGGER_CLOCK_MONITOR Clock monitor
DMA_TRIGGER_RTCC RTCC
DMA_TRIGGER_FLASH_CONTROL Flash control
DMA_TRIGGER_USB_1 USB 1
DMA_TRIGGER_ETH_1 ETH 1
DMA_TRIGGER_PARALLEL_PORT_ERROR Parallel port error
DMA_TRIGGER_CTMU CTMU
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.6.6.13 Feature Existence Routines
5.6.6.6.13.1 PLIB_DMA_ExistsAbortTransfer Function
C
bool PLIB_DMA_ExistsAbortTransfer(
DMA_MODULE_ID index
);
Description
This function identifies whether the AbortTransfer feature is available on the DMA module. When this function returns true, this
function is supported on the device:
• PLIB_DMA_AbortTransferSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AbortTransfer feature is supported on the device
• false - The AbortTransfer feature is not supported on the device
Remarks
None.
5.6.6.6.13.2 PLIB_DMA_ExistsBusy Function
C
bool PLIB_DMA_ExistsBusy(
5.6 Peripheral Library Help MPLAB Harmony Help DMA Peripheral Library Help
5-1835
DMA_MODULE_ID index
);
Description
This function identifies whether the Busy feature is available on the DMA module. When this function returns true, these
functions are supported on the device:
• PLIB_DMA_BusyActiveSet
• PLIB_DMA_BusyActiveReset
• PLIB_DMA_IsBusy
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Busy feature is supported on the device
• false - The Busy feature is not supported on the device
Remarks
None.
5.6.6.6.13.3 PLIB_DMA_ExistsChannelBits Function
C
bool PLIB_DMA_ExistsChannelBits(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelBits feature is available on the DMA module. When this function returns true, this
function is supported on the device:
• PLIB_DMA_ChannelBitsGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelBits feature is supported on the device
• false - The ChannelBits feature is not supported on the device
Remarks
None.
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5.6.6.6.13.4 PLIB_DMA_ExistsChannelX Function
C
bool PLIB_DMA_ExistsChannelX(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelX feature is available on the DMA module. When this function returns true, these
functions are supported on the device:
• PLIB_DMA_ChannelXEnable
• PLIB_DMA_ChannelXIsEnabled
• PLIB_DMA_ChannelXDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelX feature is supported on the device
• false - The ChannelX feature is not supported on the device
Remarks
None.
5.6.6.6.13.5 PLIB_DMA_ExistsChannelXAbortIRQ Function
C
bool PLIB_DMA_ExistsChannelXAbortIRQ(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXAbortIRQ feature is available on the DMA module. When this function returns true,
this function is supported on the device:
• PLIB_DMA_ChannelXAbortIRQSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXAbortIRQ feature is supported on the device
• false - The ChannelXAbortIRQ feature is not supported on the device
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Remarks
None.
5.6.6.6.13.6 PLIB_DMA_ExistsChannelXAuto Function
C
bool PLIB_DMA_ExistsChannelXAuto(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXAuto feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_ChannelXAutoEnable
• PLIB_DMA_ChannelXAutoDisable
• PLIB_DMA_ChannelXAutoIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXAuto feature is supported on the device
• false - The ChannelXAuto feature is not supported on the device
Remarks
None.
5.6.6.6.13.7 PLIB_DMA_ExistsChannelXBusy Function
C
bool PLIB_DMA_ExistsChannelXBusy(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXBusy feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_ChannelXBusyActiveSet
• PLIB_DMA_ChannelXBusyInActiveSet
• PLIB_DMA_ChannelXBusyIsBusy
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXBusy feature is supported on the device
• false - The ChannelXBusy feature is not supported on the device
Remarks
None.
5.6.6.6.13.8 PLIB_DMA_ExistsChannelXCellProgressPointer Function
C
bool PLIB_DMA_ExistsChannelXCellProgressPointer(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXCellProgressPointer feature is available on the DMA module. When this function
returns true, this function is supported on the device:
• PLIB_DMA_ChannelXCellProgressPointerGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXCellProgressPointer feature is supported on the device
• false - The ChannelXCellProgressPointer feature is not supported on the device
Remarks
None.
5.6.6.6.13.9 PLIB_DMA_ExistsChannelXCellSize Function
C
bool PLIB_DMA_ExistsChannelXCellSize(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXCellSize feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_ChannelXCellSizeGet
• PLIB_DMA_ChannelXCellSizeSet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXCellSize feature is supported on the device
• false - The ChannelXCellSize feature is not supported on the device
Remarks
None.
5.6.6.6.13.10 PLIB_DMA_ExistsChannelXChain Function
C
bool PLIB_DMA_ExistsChannelXChain(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXChain feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_ChannelXChainToLower
• PLIB_DMA_ChannelXChainToHigher
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXChain feature is supported on the device
• false - The ChannelXChain feature is not supported on the device
Remarks
None.
5.6.6.6.13.11 PLIB_DMA_ExistsChannelXChainEnbl Function
C
bool PLIB_DMA_ExistsChannelXChainEnbl(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXChainEnbl feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
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• PLIB_DMA_ChannelXChainEnable
• PLIB_DMA_ChannelXChainDisable
• PLIB_DMA_ChannelXChainIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXChainEnbl feature is supported on the device
• false - The ChannelXChainEnbl feature is not supported on the device
Remarks
None.
5.6.6.6.13.12 PLIB_DMA_ExistsChannelXDestinationPointer Function
C
bool PLIB_DMA_ExistsChannelXDestinationPointer(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXDestinationPointer feature is available on the DMA module. When this function
returns true, this function is supported on the device:
• PLIB_DMA_ChannelXDestinationPointerGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXDestinationPointer feature is supported on the device
• false - The ChannelXDestinationPointer feature is not supported on the device
Remarks
None.
5.6.6.6.13.13 PLIB_DMA_ExistsChannelXDestinationSize Function
C
bool PLIB_DMA_ExistsChannelXDestinationSize(
DMA_MODULE_ID index
);
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Description
This function identifies whether the ChannelXDestinationSize feature is available on the DMA module. When this function returns
true, these functions are supported on the device:
• PLIB_DMA_ChannelXDestinationSizeGet
• PLIB_DMA_ChannelXDestinationSizeSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXDestinationSize feature is supported on the device
• false - The ChannelXDestinationSize feature is not supported on the device
Remarks
None.
5.6.6.6.13.14 PLIB_DMA_ExistsChannelXDestinationStartAddress Function
C
bool PLIB_DMA_ExistsChannelXDestinationStartAddress(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXDestinationStartAddress feature is available on the DMA module. When this
function returns true, these functions are supported on the device:
• PLIB_DMA_ChannelXDestinationStartAddressGet
• PLIB_DMA_ChannelXDestinationStartAddressSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXDestinationStartAddress feature is supported on the device
• false - The ChannelXDestinationStartAddress feature is not supported on the device
Remarks
None.
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5.6.6.6.13.15 PLIB_DMA_ExistsChannelXDisabled Function
C
bool PLIB_DMA_ExistsChannelXDisabled(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXDisabled feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_ChannelXDisabledEnablesEvents
• PLIB_DMA_ChannelXDisabledDisablesEvents
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXDisabled feature is supported on the device
• false - The ChannelXDisabled feature is not supported on the device
Remarks
None.
5.6.6.6.13.16 PLIB_DMA_ExistsChannelXEvent Function
C
bool PLIB_DMA_ExistsChannelXEvent(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXEvent feature is available on the DMA module. When this function returns true, this
function is supported on the device:
• PLIB_DMA_ChannelXEventIsDetected
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXEvent feature is supported on the device
• false - The ChannelXEvent feature is not supported on the device
Remarks
None.
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5.6.6.6.13.17 PLIB_DMA_ExistsChannelXINTSource Function
C
bool PLIB_DMA_ExistsChannelXINTSource(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXINTSource feature is available on the DMA module. When this function returns
true, these functions are supported on the device:
• PLIB_DMA_ChannelXINTSourceEnable
• PLIB_DMA_ChannelXINTSourceDisable
• PLIB_DMA_ChannelXINTSourceIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXINTSource feature is supported on the device
• false - The ChannelXINTSource feature is not supported on the device
Remarks
None.
5.6.6.6.13.18 PLIB_DMA_ExistsChannelXINTSourceFlag Function
C
bool PLIB_DMA_ExistsChannelXINTSourceFlag(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXINTSourceFlag feature is available on the DMA module. When this function returns
true, these functions are supported on the device:
• PLIB_DMA_ChannelXINTSourceFlagGet
• PLIB_DMA_ChannelXINTSourceFlagSet
• PLIB_DMA_ChannelXINTSourceFlagClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXINTSourceFlag feature is supported on the device
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• false - The ChannelXINTSourceFlag feature is not supported on the device
Remarks
None.
5.6.6.6.13.19 PLIB_DMA_ExistsChannelXPatternData Function
C
bool PLIB_DMA_ExistsChannelXPatternData(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXPatternData feature is available on the DMA module. When this function returns
true, these functions are supported on the device:
• PLIB_DMA_ChannelXPatternDataGet
• PLIB_DMA_ChannelXPatternDataSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXPatternData feature is supported on the device
• false - The ChannelXPatternData feature is not supported on the device
Remarks
None.
5.6.6.6.13.20 PLIB_DMA_ExistsChannelXPatternIgnore Function
C
bool PLIB_DMA_ExistsChannelXPatternIgnore(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXPatternIgnore feature is available on the DMA module. When this function returns
true, these functions are supported on the device:
• PLIB_DMA_ChannelXPatternIgnoreSet
• PLIB_DMA_ChannelXPatternIgnoreGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The ChannelXPatternIgnore feature is supported on the device
• false - The ChannelXPatternIgnore feature is not supported on the device
Remarks
None.
5.6.6.6.13.21 PLIB_DMA_ExistsChannelXPatternIgnoreByte Function
C
bool PLIB_DMA_ExistsChannelXPatternIgnoreByte(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXPatternIgnoreByte feature is available on the DMA module. When this function
returns true, these functions are supported on the device:
• PLIB_DMA_ChannelXPatternIgnoreByteEnable
• PLIB_DMA_ChannelXPatternIgnoreByteIsEnabled
• PLIB_DMA_ChannelXPatternIgnoreByteDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXPatternIgnoreByte feature is supported on the device
• false - The ChannelXPatternIgnoreByte feature is not supported on the device
Remarks
None.
5.6.6.6.13.22 PLIB_DMA_ExistsChannelXPatternLength Function
C
bool PLIB_DMA_ExistsChannelXPatternLength(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXPatternLength feature is available on the DMA module. When this function returns
true, these functions are supported on the device:
• PLIB_DMA_ChannelXPatternLengthSet
• PLIB_DMA_ChannelXPatternLengthGet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXPatternLength feature is supported on the device
• false - The ChannelXPatternLength feature is not supported on the device
Remarks
None.
5.6.6.6.13.23 PLIB_DMA_ExistsChannelXPriority Function
C
bool PLIB_DMA_ExistsChannelXPriority(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXPriority feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_ChannelXPrioritySelect
• PLIB_DMA_ChannelXPriorityGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXPriority feature is supported on the device
• false - The ChannelXPriority feature is not supported on the device
Remarks
None.
5.6.6.6.13.24 PLIB_DMA_ExistsChannelXSourcePointer Function
C
bool PLIB_DMA_ExistsChannelXSourcePointer(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXSourcePointer feature is available on the DMA module. When this function returns
true, this function is supported on the device:
• PLIB_DMA_ChannelXSourcePointerGet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXSourcePointer feature is supported on the device
• false - The ChannelXSourcePointer feature is not supported on the device
Remarks
None.
5.6.6.6.13.25 PLIB_DMA_ExistsChannelXSourceSize Function
C
bool PLIB_DMA_ExistsChannelXSourceSize(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXSourceSize feature is available on the DMA module. When this function returns
true, these functions are supported on the device:
• PLIB_DMA_ChannelXSourceSizeGet
• PLIB_DMA_ChannelXSourceSizeSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXSourceSize feature is supported on the device
• false - The ChannelXSourceSize feature is not supported on the device
Remarks
None.
5.6.6.6.13.26 PLIB_DMA_ExistsChannelXSourceStartAddress Function
C
bool PLIB_DMA_ExistsChannelXSourceStartAddress(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXSourceStartAddress feature is available on the DMA module. When this function
returns true, these functions are supported on the device:
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• PLIB_DMA_ChannelXSourceStartAddressGet
• PLIB_DMA_ChannelXSourceStartAddressSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXSourceStartAddress feature is supported on the device
• false - The ChannelXSourceStartAddress feature is not supported on the device
Remarks
None.
5.6.6.6.13.27 PLIB_DMA_ExistsChannelXStartIRQ Function
C
bool PLIB_DMA_ExistsChannelXStartIRQ(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXStartIRQ feature is available on the DMA module. When this function returns true,
this function is supported on the device:
• PLIB_DMA_ChannelXStartIRQSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXStartIRQ feature is supported on the device
• false - The ChannelXStartIRQ feature is not supported on the device
Remarks
None.
5.6.6.6.13.28 PLIB_DMA_ExistsChannelXTrigger Function
C
bool PLIB_DMA_ExistsChannelXTrigger(
DMA_MODULE_ID index
);
Description
This function identifies whether the ChannelXTrigger feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
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• PLIB_DMA_ChannelXTriggerEnable
• PLIB_DMA_ChannelXTriggerIsEnabled
• PLIB_DMA_ChannelXTriggerDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChannelXTrigger feature is supported on the device
• false - The ChannelXTrigger feature is not supported on the device
Remarks
None.
5.6.6.6.13.29 PLIB_DMA_ExistsCRC Function
C
bool PLIB_DMA_ExistsCRC(
DMA_MODULE_ID index
);
Description
This function identifies whether the CRC feature is available on the DMA module. When this function returns true, these
functions are supported on the device:
• PLIB_DMA_CRCEnable
• PLIB_DMA_CRCDisable
• PLIB_DMA_CRCIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CRC feature is supported on the device
• false - The CRC feature is not supported on the device
Remarks
None.
5.6.6.6.13.30 PLIB_DMA_ExistsCRCAppendMode Function
C
bool PLIB_DMA_ExistsCRCAppendMode(
DMA_MODULE_ID index
);
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Description
This function identifies whether the CRCAppendMode feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_CRCAppendModeEnable
• PLIB_DMA_CRCAppendModeDisable
• PLIB_DMA_CRCAppendModeIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CRCAppendMode feature is supported on the device
• false - The CRCAppendMode feature is not supported on the device
Remarks
None.
5.6.6.6.13.31 PLIB_DMA_ExistsCRCBitOrder Function
C
bool PLIB_DMA_ExistsCRCBitOrder(
DMA_MODULE_ID index
);
Description
This function identifies whether the CRCBitOrder feature is available on the DMA module. When this function returns true, this
function is supported on the device:
• PLIB_DMA_CRCBitOrderSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CRCBitOrder feature is supported on the device
• false - The CRCBitOrder feature is not supported on the device
Remarks
None.
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5.6.6.6.13.32 PLIB_DMA_ExistsCRCByteOrder Function
C
bool PLIB_DMA_ExistsCRCByteOrder(
DMA_MODULE_ID index
);
Description
This function identifies whether the CRCByteOrder feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_CRCByteOrderSelect
• PLIB_DMA_CRCByteOrderGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CRCByteOrder feature is supported on the device
• false - The CRCByteOrder feature is not supported on the device
Remarks
None.
5.6.6.6.13.33 PLIB_DMA_ExistsCRCChannel Function
C
bool PLIB_DMA_ExistsCRCChannel(
DMA_MODULE_ID index
);
Description
This function identifies whether the CRCChannel feature is available on the DMA module. When this function returns true, these
functions are supported on the device:
• PLIB_DMA_CRCChannelSelect
• PLIB_DMA_CRCChannelGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CRCChannel feature is supported on the device
• false - The CRCChannel feature is not supported on the device
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Remarks
None.
5.6.6.6.13.34 PLIB_DMA_ExistsCRCData Function
C
bool PLIB_DMA_ExistsCRCData(
DMA_MODULE_ID index
);
Description
This function identifies whether the CRCData feature is available on the DMA module. When this function returns true, these
functions are supported on the device:
• PLIB_DMA_CRCDataRead
• PLIB_DMA_CRCDataWrite
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CRCData feature is supported on the device
• false - The CRCData feature is not supported on the device
Remarks
None.
5.6.6.6.13.35 PLIB_DMA_ExistsCRCPolynomialLength Function
C
bool PLIB_DMA_ExistsCRCPolynomialLength(
DMA_MODULE_ID index
);
Description
This function identifies whether the CRCPolynomialLength feature is available on the DMA module. When this function returns
true, these functions are supported on the device:
• PLIB_DMA_CRCPolynomialLengthSet
• PLIB_DMA_CRCPolynomialLengthGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The CRCPolynomialLength feature is supported on the device
• false - The CRCPolynomialLength feature is not supported on the device
Remarks
None.
5.6.6.6.13.36 PLIB_DMA_ExistsCRCType Function
C
bool PLIB_DMA_ExistsCRCType(
DMA_MODULE_ID index
);
Description
This function identifies whether the CRCType feature is available on the DMA module. When this function returns true, these
functions are supported on the device:
• PLIB_DMA_CRCTypeGet
• PLIB_DMA_CRCTypeSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CRCType feature is supported on the device
• false - The CRCType feature is not supported on the device
Remarks
None.
5.6.6.6.13.37 PLIB_DMA_ExistsCRCWriteByteOrder Function
C
bool PLIB_DMA_ExistsCRCWriteByteOrder(
DMA_MODULE_ID index
);
Description
This function identifies whether the CRCWriteByteOrder feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_CRCWriteByteOrderAlter
• PLIB_DMA_CRCWriteByteOrderMaintain
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CRCWriteByteOrder feature is supported on the device
• false - The CRCWriteByteOrder feature is not supported on the device
Remarks
None.
5.6.6.6.13.38 PLIB_DMA_ExistsCRCXOREnable Function
C
bool PLIB_DMA_ExistsCRCXOREnable(
DMA_MODULE_ID index
);
Description
This function identifies whether the CRCXOREnable feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_CRCXOREnableSet
• PLIB_DMA_CRCXOREnableGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CRCXOREnable feature is supported on the device
• false - The CRCXOREnable feature is not supported on the device
Remarks
None.
5.6.6.6.13.39 PLIB_DMA_ExistsEnableControl Function
C
bool PLIB_DMA_ExistsEnableControl(
DMA_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the DMA module. When this function returns true, these
functions are supported on the device:
• PLIB_DMA_Enable
• PLIB_DMA_Disable
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• PLIB_DMA_IsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EnableControl feature is supported on the device
• false - The EnableControl feature is not supported on the device
Remarks
None.
5.6.6.6.13.40 PLIB_DMA_ExistsLastBusAccess Function
C
bool PLIB_DMA_ExistsLastBusAccess(
DMA_MODULE_ID index
);
Description
This function identifies whether the LastBusAccess feature is available on the DMA module. When this function returns true,
these functions are supported on the device:
• PLIB_DMA_LastBusAccessIsRead
• PLIB_DMA_LastBusAccessIsWrite
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LastBusAccess feature is supported on the device
• false - The LastBusAccess feature is not supported on the device
Remarks
None.
5.6.6.6.13.41 PLIB_DMA_ExistsRecentAddress Function
C
bool PLIB_DMA_ExistsRecentAddress(
DMA_MODULE_ID index
);
Description
This function identifies whether the RecentAddress feature is available on the DMA module. When this function returns true, this
function is supported on the device:
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• PLIB_DMA_RecentAddressAccessed
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RecentAddress feature is supported on the device
• false - The RecentAddress feature is not supported on the device
Remarks
None.
5.6.6.6.13.42 PLIB_DMA_ExistsStartTransfer Function
C
bool PLIB_DMA_ExistsStartTransfer(
DMA_MODULE_ID index
);
Description
This function identifies whether the StartTransfer feature is available on the DMA module. When this function returns true, this
function is supported on the device:
• PLIB_DMA_StartTransferSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StartTransfer feature is supported on the device
• false - The StartTransfer feature is not supported on the device
Remarks
None.
5.6.6.6.13.43 PLIB_DMA_ExistsStopInIdle Function
C
bool PLIB_DMA_ExistsStopInIdle(
DMA_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the DMA module. When this function returns true, these
functions are supported on the device:
• PLIB_DMA_StopInIdleEnable
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• PLIB_DMA_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StopInIdle feature is supported on the device
• false - The StopInIdle feature is not supported on the device
Remarks
None.
5.6.6.6.13.44 PLIB_DMA_ExistsSuspend Function
C
bool PLIB_DMA_ExistsSuspend(
DMA_MODULE_ID index
);
Description
This function identifies whether the Suspend feature is available on the DMA module. When this function returns true, these
functions are supported on the device:
• PLIB_DMA_SuspendEnable
• PLIB_DMA_SuspendDisable
• PLIB_DMA_SuspendIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Suspend feature is supported on the device
• false - The Suspend feature is not supported on the device
Remarks
None.
5.6.6.7 Files
Files
Name Description
plib_dma.h Defines the DMA Peripheral Library interface functions.
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Description
5.6.6.7.1 plib_dma.h
DMA Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Direct Memory Access (DMA) Periheral Library for Microchip microcontrollers. The definitions in this file are for the DMA module.
Functions
Name Description
PLIB_DMA_AbortTransferSet Aborts transfer on the specified channel.
PLIB_DMA_BusyActiveReset Resets the BUSY bit of the DMA controller.
PLIB_DMA_BusyActiveSet Sets the BUSY bit of the DMA controller.
PLIB_DMA_ChannelBitsGet Returns the DMA channel bits.
PLIB_DMA_ChannelPriorityGet Gets the priority scheme of the DMA channels.
PLIB_DMA_ChannelPrioritySelect Sets the priority scheme of the DMA channels.
PLIB_DMA_ChannelXAbortIRQSet Sets the IRQ to abort the DMA transfer on the specified
channel.
PLIB_DMA_ChannelXAddressModeGet Gets the channel address mode.
PLIB_DMA_ChannelXAddressModeSelect Sets the channel address mode.
PLIB_DMA_ChannelXAutoDisable Channel is disabled after a block transfer is complete.
PLIB_DMA_ChannelXAutoEnable Channel is continuously enabled.
PLIB_DMA_ChannelXAutoIsEnabled Returns the channel automatic enable status.
PLIB_DMA_ChannelXBufferedDataIsWritten Returns the buffered data write status for the specified
channel.
PLIB_DMA_ChannelXBusyActiveSet Sets the Busy bit to active.
PLIB_DMA_ChannelXBusyInActiveSet Sets the Busy bit to inactive.
PLIB_DMA_ChannelXBusyIsBusy Returns the busy status of the specified channel.
PLIB_DMA_ChannelXCellProgressPointerGet Returns the number of bytes transferred since the last event.
PLIB_DMA_ChannelXCellSizeGet Reads the cell size (in bytes) configured for the specified
channel.
PLIB_DMA_ChannelXCellSizeSet Writes the specified cell size into the register corresponding
to the specified channel.
PLIB_DMA_ChannelXChainDisable Disables the channel chaining for the specified DMA
channel.
PLIB_DMA_ChannelXChainEnable Channel chain feature is enabled.
PLIB_DMA_ChannelXChainIsEnabled Returns the chain status of the specified channel.
PLIB_DMA_ChannelXChainToHigher Chains the specified channel to a channel higher in natural
priority.
PLIB_DMA_ChannelXChainToLower Chains the specified channel to a channel lower in natural
priority.
PLIB_DMA_ChannelXCollisionStatus Returns the status of the specified collison type for the
specified channel.
PLIB_DMA_ChannelXDataSizeGet Returns the current data size for the specified channel.
PLIB_DMA_ChannelXDataSizeSelect Selects the data size for the specified channel.
PLIB_DMA_ChannelXDestinationAddressModeGet Gets the source address mode of the specified channel.
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PLIB_DMA_ChannelXDestinationAddressModeSelect Sets the source address mode of the specified channel.
PLIB_DMA_ChannelXDestinationPointerGet Reads the current byte of the destination being pointed to
for the specified channel.
PLIB_DMA_ChannelXDestinationSizeGet Reads the destination size configured for the specified
channel.
PLIB_DMA_ChannelXDestinationSizeSet Writes the specified destination size into the register
corresponding to the specified channel.
PLIB_DMA_ChannelXDestinationStartAddressGet Reads the destination start address configured for the
specified channel.
PLIB_DMA_ChannelXDestinationStartAddressSet Writes the specified destination start address into the
register corresponding to the specified channel.
PLIB_DMA_ChannelXDisable Disable the specified channel.
PLIB_DMA_ChannelXDisabledDisablesEvents Channel start/abort events will be ignored even if the
channel is disabled.
PLIB_DMA_ChannelXDisabledEnablesEvents Channel start/abort events will be registered even if the
channel is disabled.
PLIB_DMA_ChannelXEnable Enable the specified channel.
PLIB_DMA_ChannelXEventIsDetected Returns the event status on the specified channel.
PLIB_DMA_ChannelXINTSourceDisable Disables the specified interrupt source for the specified
channel.
PLIB_DMA_ChannelXINTSourceEnable Enables the specified interrupt source for the specified
channel.
PLIB_DMA_ChannelXINTSourceFlagClear Clears the interrupt flag of the specified DMA interrupt
source for the specified channel.
PLIB_DMA_ChannelXINTSourceFlagGet Returns the status of the interrupt flag of the specified DMA
interrupt source for the specified channel.
PLIB_DMA_ChannelXINTSourceFlagSet Sets the interrupt flag of the specified DMA interrupt source
for the specified channel.
PLIB_DMA_ChannelXINTSourceIsEnabled Returns the enable status of the specified interrupt source
for the specified channel.
PLIB_DMA_ChannelXIsEnabled Return the enable status of the specified channel.
PLIB_DMA_ChannelXNullWriteModeDisable Disables the Null Write mode.
PLIB_DMA_ChannelXNullWriteModeEnable Enables the Null Write mode.
PLIB_DMA_ChannelXNullWriteModeIsEnabled Returns the enable status of the Null Write mode for the
specified channel.
PLIB_DMA_ChannelXOperatingTransferModeGet Returns the current transfer/operating mode for the
specified channel.
PLIB_DMA_ChannelXOperatingTransferModeSelect Selects the transfer/operating mode for the specified
channel.
PLIB_DMA_ChannelXPatternDataGet Returns the pattern matching (for DMA abort) data
programmed for the specified channel.
PLIB_DMA_ChannelXPatternDataSet Writes the specified pattern matching data (for DMA abort)
into the register corresponding to the specified channel.
PLIB_DMA_ChannelXPatternIgnoreByteDisable Disables the pattern match ignore byte.
PLIB_DMA_ChannelXPatternIgnoreByteEnable Enables the pattern match ignore byte.
PLIB_DMA_ChannelXPatternIgnoreByteIsEnabled Returns the state of the pattern match ignore byte.
PLIB_DMA_ChannelXPatternIgnoreGet Returns the pattern match ignore value.
PLIB_DMA_ChannelXPatternIgnoreSet Sets the pattern match ignore value.
PLIB_DMA_ChannelXPatternLengthGet Returns the pattern match length.
PLIB_DMA_ChannelXPatternLengthSet Sets the pattern match length.
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PLIB_DMA_ChannelXPeripheralAddressGet Gets the peripheral address configured for the specified
channel.
PLIB_DMA_ChannelXPeripheralAddressSet Sets the peripheral address for the specified channel.
PLIB_DMA_ChannelXPingPongModeGet Returns the Ping-Pong mode status for the specified
channel.
PLIB_DMA_ChannelXPriorityGet Gets the priority of the specified channel.
PLIB_DMA_ChannelXPrioritySelect Sets the priority of the specified channel.
PLIB_DMA_ChannelXReloadDisable Disables reloading of the address and count registers.
PLIB_DMA_ChannelXReloadEnable Enables reloading of the address and count registers.
PLIB_DMA_ChannelXReloadIsEnabled Returns the address and count registers reload enable
status.
PLIB_DMA_ChannelXSourceAddressModeGet Gets the source address mode of the specified channel.
PLIB_DMA_ChannelXSourceAddressModeSelect Sets the source address mode of the specified channel.
PLIB_DMA_ChannelXSourcePointerGet Reads the current byte of the source being pointed to for
the specified channel.
PLIB_DMA_ChannelXSourceSizeGet Reads the source size configured for the specified channel.
PLIB_DMA_ChannelXSourceSizeSet Writes the specified source size into the register
corresponding to the specified channel.
PLIB_DMA_ChannelXSourceStartAddressGet Reads the source start address configured for the specified
channel.
PLIB_DMA_ChannelXSourceStartAddressSet Writes the specified source start address into the register
corresponding to the specified channel.
PLIB_DMA_ChannelXStartAddressOffsetGet Gets the primary/secondary start address (DPSRAM) offset.
PLIB_DMA_ChannelXStartAddressOffsetSet Sets the primary/secondary start address (DPSRAM) offset
to the value specified depending on the offset type specified
for the specified channel.
PLIB_DMA_ChannelXStartIRQSet Sets the IRQ to initiate the DMA transfer on the specified
channel.
PLIB_DMA_ChannelXTransferCountGet Gets the DMA data transfer count that is programmed for
the specified channel.
PLIB_DMA_ChannelXTransferCountSet Sets the DMA data transfer count for the specified channel.
PLIB_DMA_ChannelXTransferDirectionGet Returns the data transfer direction of the specified channel.
PLIB_DMA_ChannelXTransferDirectionSelect Selects the data transfer direction of the specified channel.
PLIB_DMA_ChannelXTriggerDisable Disables the DMA transfer abort via a matching interrupt
(specified by the IRQ).
PLIB_DMA_ChannelXTriggerEnable Enables the specified DMA channel trigger.
PLIB_DMA_ChannelXTriggerIsEnabled Returns the enable status of the specified DMA
transfer/abort trigger.
PLIB_DMA_CRCAppendModeDisable Disables the CRC append mode.
PLIB_DMA_CRCAppendModeEnable Enables the CRC append mode.
PLIB_DMA_CRCAppendModeIsEnabled Gets the enable status of the CRC append mode.
PLIB_DMA_CRCBitOrderSelect Selects the bit order for checksum caluculation.
PLIB_DMA_CRCByteOrderGet Gets the current byte order selected by the DMA module
CRC feature.
PLIB_DMA_CRCByteOrderSelect Selects the byte order.
PLIB_DMA_CRCChannelGet Returns the current DMA channel to which the CRC is
assigned.
PLIB_DMA_CRCChannelSelect Assignes the CRC to the specified DMA channel.
PLIB_DMA_CRCDataRead Reads the contents of the DMA CRC data register.
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PLIB_DMA_CRCDataWrite Writes the contents of the DMA CRC data register with the
specified data.
PLIB_DMA_CRCDisable Disables the DMA module CRC feature.
PLIB_DMA_CRCEnable Enables the DMA module CRC feature.
PLIB_DMA_CRCIsEnabled Gets the enable status of the CRC feature.
PLIB_DMA_CRCPolynomialLengthGet Gets the current polynomial length.
PLIB_DMA_CRCPolynomialLengthSet Selects the polynomial length.
PLIB_DMA_CRCTypeGet Gets the current DMA module CRC feature type.
PLIB_DMA_CRCTypeSet Selects the DMA module CRC feature type.
PLIB_DMA_CRCWriteByteOrderAlter The source data is written to the destination reordered as
defined by the BYTO<1:0> bits.
PLIB_DMA_CRCWriteByteOrderMaintain The source data is written to the destination unaltered.
PLIB_DMA_CRCXOREnableGet Reads the CRC XOR register.
PLIB_DMA_CRCXOREnableSet Writes to the CRC XOR enable register as per the specified
enable mask.
PLIB_DMA_Disable DMA module is disabled.
PLIB_DMA_Enable DMA module is enabled.
PLIB_DMA_ExistsAbortTransfer Identifies whether the AbortTransfer feature exists on the
DMA module.
PLIB_DMA_ExistsBusy Identifies whether the Busy feature exists on the DMA
module.
PLIB_DMA_ExistsChannelBits Identifies whether the ChannelBits feature exists on the
DMA module.
PLIB_DMA_ExistsChannelX Identifies whether the ChannelX feature exists on the DMA
module.
PLIB_DMA_ExistsChannelXAbortIRQ Identifies whether the ChannelXAbortIRQ feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXAuto Identifies whether the ChannelXAuto feature exists on the
DMA module.
PLIB_DMA_ExistsChannelXBusy Identifies whether the ChannelXBusy feature exists on the
DMA module.
PLIB_DMA_ExistsChannelXCellProgressPointer Identifies whether the ChannelXCellProgressPointer feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXCellSize Identifies whether the ChannelXCellSize feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXChain Identifies whether the ChannelXChain feature exists on the
DMA module.
PLIB_DMA_ExistsChannelXChainEnbl Identifies whether the ChannelXChainEnbl feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXDestinationPointer Identifies whether the ChannelXDestinationPointer feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXDestinationSize Identifies whether the ChannelXDestinationSize feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXDestinationStartAddress Identifies whether the ChannelXDestinationStartAddress
feature exists on the DMA module.
PLIB_DMA_ExistsChannelXDisabled Identifies whether the ChannelXDisabled feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXEvent Identifies whether the ChannelXEvent feature exists on the
DMA module.
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PLIB_DMA_ExistsChannelXINTSource Identifies whether the ChannelXINTSource feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXINTSourceFlag Identifies whether the ChannelXINTSourceFlag feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXPatternData Identifies whether the ChannelXPatternData feature exists
on the DMA module
PLIB_DMA_ExistsChannelXPatternIgnore Identifies whether the ChannelXPatternIgnore feature exists
on the DMA module.
PLIB_DMA_ExistsChannelXPatternIgnoreByte Identifies whether the ChannelXPatternIgnoreByte feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXPatternLength Identifies whether the ChannelXPatternLength feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXPriority Identifies whether the ChannelXPriority feature exists on the
DMA module.
PLIB_DMA_ExistsChannelXSourcePointer Identifies whether the ChannelXSourcePointer feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXSourceSize Identifies whether the ChannelXSourceSize feature exists
on the DMA module.
PLIB_DMA_ExistsChannelXSourceStartAddress Identifies whether the ChannelXSourceStartAddress feature
exists on the DMA module.
PLIB_DMA_ExistsChannelXStartIRQ Identifies whether the ChannelXStartIRQ feature exists on
the DMA module.
PLIB_DMA_ExistsChannelXTrigger Identifies whether the ChannelXTrigger feature exists on
the DMA module.
PLIB_DMA_ExistsCRC Identifies whether the CRC feature exists on the DMA
module.
PLIB_DMA_ExistsCRCAppendMode Identifies whether the CRCAppendMode feature exists on
the DMA module.
PLIB_DMA_ExistsCRCBitOrder Identifies whether the CRCBitOrder feature exists on the
DMA module.
PLIB_DMA_ExistsCRCByteOrder Identifies whether the CRCByteOrder feature exists on the
DMA module.
PLIB_DMA_ExistsCRCChannel Identifies whether the CRCChannel feature exists on the
DMA module.
PLIB_DMA_ExistsCRCData Identifies whether the CRCData feature exists on the DMA
module.
PLIB_DMA_ExistsCRCPolynomialLength Identifies whether the CRCPolynomialLength feature exists
on the DMA module.
PLIB_DMA_ExistsCRCType Identifies whether the CRCType feature exists on the DMA
module.
PLIB_DMA_ExistsCRCWriteByteOrder Identifies whether the CRCWriteByteOrder feature exists on
the DMA module.
PLIB_DMA_ExistsCRCXOREnable Identifies whether the CRCXOREnable feature exists on the
DMA module.
PLIB_DMA_ExistsEnableControl Identifies whether the EnableControl feature exists on the
DMA module.
PLIB_DMA_ExistsLastBusAccess Identifies whether the LastBusAccess feature exists on the
DMA module.
PLIB_DMA_ExistsRecentAddress Identifies whether the RecentAddress feature exists on the
DMA module.
PLIB_DMA_ExistsStartTransfer Identifies whether the StartTransfer feature exists on the
DMA module.
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PLIB_DMA_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the DMA
module.
PLIB_DMA_ExistsSuspend Identifies whether the Suspend feature exists on the DMA
module.
PLIB_DMA_IsBusy Gets the BUSY bit of the DMA controller.
PLIB_DMA_IsEnabled Returns the DMA module enable status.
PLIB_DMA_LastBusAccessIsRead Returns true if the last DMA bus access was a read.
PLIB_DMA_LastBusAccessIsWrite Returns true if the last DMA bus access was a write.
PLIB_DMA_LastChannelActive Returns the last DMA channel that participated in the data
transfer.
PLIB_DMA_RecentAddressAccessed Returns the address of the most recent DMA access.
PLIB_DMA_StartTransferSet Initiates transfer on the specified channel.
PLIB_DMA_StopInIdleDisable DMA transfers continue during Idle mode.
PLIB_DMA_StopInIdleEnable DMA transfers are halted during Idle mode.
PLIB_DMA_SuspendDisable DMA suspend is disabled and the DMA module operates
normally.
PLIB_DMA_SuspendEnable DMA transfers are suspended to allow uninterrupted access
by the CPU to the data bus.
PLIB_DMA_SuspendIsEnabled Returns the DMA suspend status.
File Name
plib_dma.h
Company
Microchip Technology Inc.
5.6.7 EBI Peripheral Library
5.6.7.1 Introduction
EBI Peripheral Library
for
Microchip Microcontrollers
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This library provides a low-level abstraction of the EBI Peripheral Library that is available on the Microchip family of
microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module without the
necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller variant to
another.
Description
The External Bus Interface (EBI) allows for external physical memory to be mapped into the kernels virtual memory map. The
External Bus Interface (EBI) module provides a high-speed, convenient way to interface
external parallel memory devices to the PIC32 family device. With the EBI module, it is possible to connect asynchronous SRAM
and NOR Flash devices, as well as non-memory devices such as camera sensors. The module also supports Low-Cost
Controllerless (LCC) Graphics devices.
5.6.7.2 Release Notes
MPLAB Harmony Version: v0.70b EBI Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.7.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
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SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.7.4 Using the Library
This topic describes the basic architecture of the EBI Peripheral Library and provides information and examples on how to use it.
Interface Header File: plib_ebi.h
The interface to the EBI Peripheral library is defined in the "plib_ebi.h" header file. This file is included by the "peripheral.h" file.
Any C language source (.c) file that uses the EBI Peripheral library should include "plib_ebi.h".
Library File:
The EBI Peripheral library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the Peripheral interacts with the framework.
5.6.7.5 How the Library Works
Before using the EBI module, it must be enabled by the application developer(s). To work correctly, the device characteristics of
the attached Memory/Flash must be set with the functions in this library. The Characteristics of the Memory/Flash will be found in
the specific device data sheet.
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes.
5.6.7.6 Configuring the Library
The library is configured for the supported processor when the processor is chosen in the MPLAB IDE.
5.6.7.7 Library Interface
Existence Functions
Name Description
PLIB_EBI_ExistsAddressHoldTime Identifies whether the AddressHoldTime feature exists on the EBI
module
PLIB_EBI_ExistsAddressPinEnableBits Identifies whether the AddressPinEnableBits feature exists on the
EBI module
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PLIB_EBI_ExistsAddressSetupTime Identifies whether the AddressSetupTime feature exists on the EBI
module
PLIB_EBI_ExistsBaseAddress Identifies whether the Base_Address feature exists on the EBI
module
PLIB_EBI_ExistsByteSelectPin Identifies whether the ByteSelectPin feature exists on the EBI module
PLIB_EBI_ExistsChipSelectEnable Identifies whether the ChipSelectEnable feature exists on the EBI
module
PLIB_EBI_ExistsControlEnable Identifies whether the ControlEnable feature exists on the EBI
module
PLIB_EBI_ExistsDataEnable Identifies whether the DataEnable feature exists on the EBI module
PLIB_EBI_ExistsDataTurnAroundTime Identifies whether the DataTurnAroundTime feature exists on the
EBI module
PLIB_EBI_ExistsFlashPowerDownMode Identifies whether the FlashPowerDownMode feature exists on the
EBI module
PLIB_EBI_ExistsFlashResetPin Identifies whether the FlashResetPin feature exists on the EBI
module
PLIB_EBI_ExistsFlashTiming Identifies whether the FlashTiming feature exists on the EBI module
PLIB_EBI_ExistsMemoryCharacteristics Identifies whether the MemoryCharacteristics feature exists on the
EBI module
PLIB_EBI_ExistsMemoryPaging Identifies whether the MemoryPaging feature exists on the EBI
module
PLIB_EBI_ExistsMemoryTimingConfig Identifies whether the MemoryTimingConfig feature exists on the EBI
module
PLIB_EBI_ExistsPageMode Identifies whether the PageMode feature exists on the EBI module
PLIB_EBI_ExistsPageReadTime Identifies whether the PageReadTime feature exists on the EBI
module
PLIB_EBI_ExistsReadCycleTime Identifies whether the ReadCycleTime feature exists on the EBI
module
PLIB_EBI_ExistsReadyMode Identifies whether the ReadyMode feature exists on the EBI module
PLIB_EBI_ExistsReadyPin1Config Identifies whether the ReadyPin1Config feature exists on the EBI
module
PLIB_EBI_ExistsReadyPin2Config Identifies whether the ReadyPin2Config feature exists on the EBI
module
PLIB_EBI_ExistsReadyPin3Config Identifies whether the ReadyPin3Config feature exists on the EBI
module
PLIB_EBI_ExistsReadyPinSens Identifies whether the ReadyPinSens feature exists on the EBI
module
PLIB_EBI_ExistsStaticMemoryWidthRegister Identifies whether the StaticMemoryWidthRegister feature exists on
the EBI module
PLIB_EBI_ExistsWriteOutputControl Identifies whether the WriteOutputControl feature exists on the EBI
module
PLIB_EBI_ExistsWritePulseWidth Identifies whether the WritePulseWidth feature exists on the EBI
module
General Functions
Name Description
PLIB_EBI_ControlEnableClear This function gets the set power down state.
Get Functions
Name Description
PLIB_EBI_AddressHoldTimeGet This function returns the Address Hold Time
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PLIB_EBI_AddressSetupTimeGet This function is to get the set hold time
PLIB_EBI_BaseAddressGet This function returns the Base Address set for each chip select
PLIB_EBI_ControlEnableGet This function gets the status of the enable bit for EBI.
PLIB_EBI_DataTurnAroundTimeGet This function gets the data turn time set for the EBI Bus.
PLIB_EBI_FlashPowerDownModeGet This function gets the set power down state.
PLIB_EBI_FlashResetPinGet This function sets the the control use of Ready pin and the inverts
status
PLIB_EBI_FlashTimingGet This function gets the set flash timing for external flash
PLIB_EBI_PageModeGet This function returns Paging mode settings
PLIB_EBI_PageReadCycleTimeGet This function returns the cycle time for a page read.
PLIB_EBI_PageSizeGet This function returns Paging mode settings
PLIB_EBI_ReadCycleTimeGet This function returns the read time in number of clock cycles
PLIB_EBI_ReadyModeGet This function returns whether or not the Ready Mode was set.
PLIB_EBI_StaticMemoryWidthRegisterGet This function get the width of the set data bus
PLIB_EBI_WritePulseWidthGet This function returns the set hold time in clock cycles.
Set Functions
Name Description
PLIB_EBI_AddressPinEnableBitsSet This function sets the address pins used for EBI.
PLIB_EBI_BaseAddressSet This function sets the Base address for physical memory at each chip
select
PLIB_EBI_ByteSelectPinSet This function sets the data Byte Select High [15:8] and Low [7:0]
enable pins for use.
PLIB_EBI_ChipSelectEnableSet This function sets the Chip Select pins for use with the EBI or GPIO.
PLIB_EBI_DataEnableSet This function sets the use of Data Byte Select Pins, High and Low, for
control with EBI or GPIO use.
PLIB_EBI_FlashPowerDownModeSet This function sets the pin state for flash devices on power down/reset
PLIB_EBI_FlashResetPinSet This function sets the the control use of Ready pin and the inverts
status
PLIB_EBI_FlashTimingSet This function sets the timing for hold in reset for external flash
PLIB_EBI_MemoryCharacteristicsSet This function set the Memory Characteristics for Memory or attached
devices attached to that pin
PLIB_EBI_MemoryPagingSet This function sets the size of the memory page if paging is used.
PLIB_EBI_MemoryTimingConfigSet This function is to set the cycle time for page reading
PLIB_EBI_ReadyPin1ConfigSet This function sets the the control use of Ready pin and the inverts
status.
PLIB_EBI_ReadyPin2ConfigSet This function sets the the control use of Ready pin and the inverts
status
PLIB_EBI_ReadyPin3ConfigSet This function sets the the control use of Ready pin and the inverts
status
PLIB_EBI_ReadyPinSensSet This function sets the the control use of Ready pin and the inverts
status
PLIB_EBI_StaticMemoryWidthRegisterSet This function set the data width of static memory.
PLIB_EBI_WriteOutputControlSet This function sets the Write Enable & Output Enable control pins
PLIB_EBI_ControlEnableSet This function sets the enable bit for turning on or off the EBI Bus.
PLIB_EBI_ReadyModeSet This function sets the use of ready mode for each pin. The attached
device will either pull the ready pin high or low.
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Description
This section describes the Application Programming Interface (API) functions of the EBI Peripheral.
Refer to each section for a detailed description.
5.6.7.7.1 General Functions
5.6.7.7.1.1 PLIB_EBI_ControlEnableClear Function
C
void PLIB_EBI_ControlEnableClear(
EBI_MODULE_ID index
);
Description
EBIPINEN - in datasheet EBI Pin Enable bit 1 = EBI controls access of pins shared with PMP 0 = Pins shared with EBI are
available for general use
Parameters
Parameters Description
index Identifier for the device instance
Returns
None
Remarks
None.
5.6.7.7.2 Get Functions
5.6.7.7.2.1 PLIB_EBI_AddressHoldTimeGet Function
C
int PLIB_EBI_AddressHoldTimeGet(
EBI_MODULE_ID index,
int ChipSelectNumber
);
Description
TWR - in the datasheet.
Parameters
Parameters Description
index Identifier for the device instance
ChipSelectNumber Identifies the specific chip select pin
Returns
Returns a integer, the Address & Data Hold time in number of clocks.
Remarks
None.
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5.6.7.7.2.2 PLIB_EBI_AddressSetupTimeGet Function
C
int PLIB_EBI_AddressSetupTimeGet(
EBI_MODULE_ID index,
int ChipSelectNumber
);
Description
TAS - in the data sheet Clock cycles for address setup time. A value of ‘0’ is only valid in the case of SSRAM.
Parameters
Parameters Description
index Identifier for the device instance
ChipSelectNumber Identifies the specific chip select pin
Returns
Returns a integer, the address setup time in number of clocks
Remarks
None.
5.6.7.7.2.3 PLIB_EBI_BaseAddressGet Function
C
uint32_t PLIB_EBI_BaseAddressGet(
EBI_MODULE_ID index,
int ChipSelectNumber
);
Description
CSADDR- in datasheet.
This function returns the base address for each chip select pin
Parameters
Parameters Description
index Identifier for the device instance.
ChipSelectNumber Identifies what chip select address pin address is being read.
Returns
Returns a unsigned integer that is the physical address of the attached device
Remarks
None.
5.6.7.7.2.4 PLIB_EBI_ControlEnableGet Function
C
bool PLIB_EBI_ControlEnableGet(
EBI_MODULE_ID index
);
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Description
EBIPINEN - in datasheet.
EBI Pin Enable bit 1 = EBI controls access of pins shared with PMP 0 = Pins shared with EBI are available for general use
Parameters
Parameters Description
index Identifier for the device instance
Returns
Returns a bool, if EBI is ON or OFF.
Remarks
None.
5.6.7.7.2.5 PLIB_EBI_DataTurnAroundTimeGet Function
C
int PLIB_EBI_DataTurnAroundTimeGet(
EBI_MODULE_ID index,
int ChipSelectNumber
);
Description
TBTA - in the datasheet.
Returns the clock cycles (0-7) for static memory between read-to-write, write-to-read, and read-to-read when Chip Select
changes.
Parameters
Parameters Description
index Identifier for the device instance
ChipSelectNumber Identifies the specific chip select pin
Returns
Returns a integer, the number of clock cycles that is set in the Turn Around Register
Remarks
None.
5.6.7.7.2.6 PLIB_EBI_FlashPowerDownModeGet Function
C
bool PLIB_EBI_FlashPowerDownModeGet(
EBI_MODULE_ID index
);
Description
SMRP - in datasheet After a Reset, the controller internally performs a power-down for Flash, and then sets this bit to ‘1’. 1 =
Flash is taken out of Power-down mode 0 = Flash is forced into Power-down mode
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Parameters
Parameters Description
index Identifier for the device instance
Returns
returns a bool, depending on how FlashPowerDownMode its set
Remarks
None.
5.6.7.7.2.7 PLIB_EBI_FlashResetPinGet Function
C
bool PLIB_EBI_FlashResetPinGet(
EBI_MODULE_ID index
);
Description
EBIRPEN - in datasheet.
EBIRP Flash Reset pin, 1 = pin is enabled for use by the EBI module 0 = pin is available for general use.
Parameters
Parameters Description
index Identifier for the device instance
Returns
returns a bool.
Remarks
None.
5.6.7.7.2.8 PLIB_EBI_FlashTimingGet Function
C
int PLIB_EBI_FlashTimingGet(
EBI_MODULE_ID index,
int ChipSelectNumber
);
Description
TRPD -in data sheet The number of clock cycles to hold the external Flash memory in reset.
Preconditions
MemoryType set to Flash
Returns
returns a integer, the number of clock cycles
Remarks
None.
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5.6.7.7.2.9 PLIB_EBI_PageModeGet Function
C
bool PLIB_EBI_PageModeGet(
EBI_MODULE_ID index,
int ChipSelectNumber
);
Description
PAGEMODE - in datasheet.
This Function returns the state of the register PAGEMODE, If the function returns a 1, Device supports Page mode. If the
Function returns a 0,Device does not support Page mode .
Parameters
Parameters Description
index Identifier for the device instance
ChipSelectNumber Identifies the specific chip select pin
Returns
This function Returns a bool, 1 = Page Mode is used, 0 = Page Mode is not used.
Remarks
None.
5.6.7.7.2.10 PLIB_EBI_PageReadCycleTimeGet Function
C
int PLIB_EBI_PageReadCycleTimeGet(
EBI_MODULE_ID index,
int ChipSelectNumber
);
Description
TPRC - in datasheet.
Read cycle time = TPRC + 1cycle. The value set and return are the same, the controller performs the read on the next clock, that
is why there is a +1.
Parameters
Parameters Description
index Identifier for the device instance
ChipSelectNumber Identifies the specific chip select pin
Returns
Returns a integer, the number of clock cycles used to read a memory page.
Remarks
None.
5.6.7.7.2.11 PLIB_EBI_PageSizeGet Function
C
EBI_PAGE_SIZE PLIB_EBI_PageSizeGet(
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EBI_MODULE_ID index,
int ChipSelectNumber
);
Description
PAGESIZE- in datasheet.
Parameters
Parameters Description
index Identifier for the device instance
ChipSelectNumber Identifies the specific chip select pin
Returns
This function Returns the size of the memory page.
Remarks
None.
5.6.7.7.2.12 PLIB_EBI_ReadCycleTimeGet Function
C
int PLIB_EBI_ReadCycleTimeGet(
EBI_MODULE_ID index,
int ChipSelectNumber
);
Description
TRC in datasheet.
Read Cycle time = TRC +1 clock cycle, the controller will always take 1 extra clock (the next clock) for a Read Cycle. The return
will be the time set by the user.
setting a the Read Cycle time to a 0 will return a 0 when read, but the controller will add 1 to that value for the next available
clock.
Parameters
Parameters Description
index Identifier for the device instance
ChipSelectNumber Identifies which chip select number the device is attached to.
Returns
returns a integer, the read cycle time in system clocks.
Remarks
None.
5.6.7.7.2.13 PLIB_EBI_ReadyModeGet Function
C
bool PLIB_EBI_ReadyModeGet(
EBI_MODULE_ID index,
int ChipSelectNumber
);
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Description
RDYMODE - in datasheet.
This Function returns the state of the register RDYMODE, If the function returns a 1, Ready input is used. If the Function returns
a 0, Ready input is not used.
Parameters
Parameters Description
index Identifier for the device instance
ChipSelectNumber Identifies the specific chip select pin
Returns
This function Returns a bool, 1 = Ready input is used, 0 = Ready input is not used.
Remarks
None.
5.6.7.7.2.14 PLIB_EBI_StaticMemoryWidthRegisterGet Function
C
EBI_STATIC_MEMORY_WIDTH PLIB_EBI_StaticMemoryWidthRegisterGet(
EBI_MODULE_ID index,
int RegstierNumber
);
Description
SMDWIDTH - in data sheet 100 = 16 bits 000 = 8 bits
Parameters
Parameters Description
index Identifier for the device instance
Returns
returns a enum type, which bus mode is used
Remarks
None.
5.6.7.7.2.15 PLIB_EBI_WritePulseWidthGet Function
C
int PLIB_EBI_WritePulseWidthGet(
EBI_MODULE_ID index,
int ChipSelectNumber
);
Description
TWP in the datasheet.
Write Pulse with = TWP + 1 clock cycle
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Parameters
Parameters Description
index Identifier for the device instance
ChipSelectNumber Identifies the specific chip select pin
Returns
Returns a integer, the number of clock cycles the write pulse width is set to.
Remarks
None.
5.6.7.7.3 Set Functions
5.6.7.7.3.1 PLIB_EBI_AddressPinEnableBitsSet Function
C
void PLIB_EBI_AddressPinEnableBitsSet(
EBI_MODULE_ID index,
EBI_ADDRESS_PORT AddressPort
);
Description
These pins have to be enabled for the size of the data bus in a contiguous order.
EBIA23EN:EBIA0EN - in datasheet.
EBI Address Pin Enable bits,
1 = pin is enabled for use by EBI, 0 = pin has is available for general use.
Parameters
Parameters Description
index Identifier for the device instance.
AddressPort Identifies how many pins are used for addressing on the EBI bus.
Returns
None.
Remarks
None.
5.6.7.7.3.2 PLIB_EBI_BaseAddressSet Function
C
void PLIB_EBI_BaseAddressSet(
EBI_MODULE_ID index,
int ChipSelectNumber,
uint32_t BaseAddress
);
Description
CSADDR- in datasheet.
This function sets the base address for physical memory at each chip select pin.
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Preconditions
EBI has to be supported by the microcontroller and has to have a device attached to it.
Parameters
Parameters Description
index Identifier for the device instance.
ChipSelectNumber Identifies what chip select address pin is being assigned an address
BaseAddress a physical address for memory
Returns
None.
Remarks
None.
5.6.7.7.3.3 PLIB_EBI_ByteSelectPinSet Function
C
void PLIB_EBI_ByteSelectPinSet(
EBI_MODULE_ID index,
bool ByteSelect0,
bool ByteSelect1
);
Description
If the system uses Byte Select High/Low pins for the data, the pins must be enabled for use in the EBI controller.
EBIBSEN0 - in datasheet.
EBIBSEN0, This Controls the pin Enable bit for the Lower Data Byte Select. Lower Data Byte is bits 8:0.
1 = pin is enabled for use by the EBI module, 0 = pin is available for general use.
EBIBSEN1 - in datasheet.
EBIBSEN1, This Controls the pin Enable bit for the Upper Data Byte Select. Upper Data Byte is bits 15:8.
1 = pin is enabled for use by the EBI module, 0 = pin is available for general use.
Preconditions
Registers EBIDEN0 & EBIDEN1 must be enabled first, this can be done in the function PLIB_EBI_DataEnableSet().
Parameters
Parameters Description
index Identifier for the device instance
ByteSelect0 Identifies Lower Byte Select Pin for enabling.
ByteSelect1 Identifies Upper Byte Select Pin for enabling.
Returns
None.
Remarks
None.
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5.6.7.7.3.4 PLIB_EBI_ChipSelectEnableSet Function
C
void PLIB_EBI_ChipSelectEnableSet(
EBI_MODULE_ID index,
bool ChipSelect0,
bool ChipSelect1,
bool ChipSelect2,
bool ChipSelect3
);
Description
EBICSEN0 = EBI ChipSelect0 Pin Enable bit. 1 = pin is enabled for use by the EBI module, 0 = pin is available for general use.
EBICSEN1 = EBI ChipSelect1 Pin Enable bit. 1 = pin is enabled for use by the EBI module, 0 = pin is available for general use.
EBICSEN2 = EBI ChipSelect2 Pin Enable bit. 1 = pin is enabled for use by the EBI module, 0 = pin is available for general use.
EBICSEN3 = EBI ChipSelect3 Pin Enable bit. 1 = pin is enabled for use by the EBI module, 0 = pin is available for general use.
Parameters
Parameters Description
index Identifier for the device instance
ChipSelect0 Identifies control of Chip Select 0 for enabling.
ChipSelect1 Identifies control of Chip Select 1 for enabling.
ChipSelect2 Identifies control of Chip Select 2 for enabling.
ChipSelect3 Identifies control of Chip Select 3 for enabling.
Returns
None.
Remarks
None.
5.6.7.7.3.5 PLIB_EBI_DataEnableSet Function
C
void PLIB_EBI_DataEnableSet(
EBI_MODULE_ID index,
bool DataUpperByte,
bool DataLowerByte
);
Description
EBIDEN1 - in datasheet.
EBI Data Upper Byte Pin Enable bit.
1 = [15:8] pins are enabled for use by the EBI module, 0 = [15:8] pins have reverted to general use.
EBIDEN0 - in datasheet.
EBI Data Upper Byte Pin Enable bit.
1 = [7:0] pins are enabled for use by the EBI module, 0 = [7:0] pins have reverted to general use.
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Parameters
Parameters Description
index Identifier for the device instance
DataUpperByte Identifies control of Upper Data Byte for enabling.
DataLowerByte Identifies control of Lower Data Byte for enabling.
Returns
None.
Remarks
None.
5.6.7.7.3.6 PLIB_EBI_FlashPowerDownModeSet Function
C
void PLIB_EBI_FlashPowerDownModeSet(
EBI_MODULE_ID index,
bool FlashPowerDownMode
);
Description
SMRP- in datasheet.
After a Reset, the controller internally performs a power-down for Flash, and then sets this bit to ‘1’.
1 = Flash is taken out of Power-down mode.
0 = Flash is forced into Power-down mode.
Parameters
Parameters Description
index Identifier for the device instance
FlashPowerDownMode a bool, sets the power down state for flash memory
Returns
None.
Remarks
None.
5.6.7.7.3.7 PLIB_EBI_FlashResetPinSet Function
C
void PLIB_EBI_FlashResetPinSet(
EBI_MODULE_ID index,
bool FlashResetPin
);
Description
EBIRPEN - in datasheet.
EBIRP Flash Reset pin, 1 = pin is enabled for use by the EBI module 0 = pin is available for general use.
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Parameters
Parameters Description
index Identifier for the device instance
FlashReadPin Flash Rest Pin is Used
Returns
None.
Remarks
None.
5.6.7.7.3.8 PLIB_EBI_FlashTimingSet Function
C
void PLIB_EBI_FlashTimingSet(
EBI_MODULE_ID index,
int FlashTiming
);
Description
TRPD - in datasheet.
The number of clock cycles to hold the external Flash memory in reset.
Preconditions
NOR Flash has to be used with EBI instead of SRAM
Parameters
Parameters Description
index Identifier for the device instance
FlashTiming an int, the number of clock cycles
Returns
None.
Remarks
None.
5.6.7.7.3.9 PLIB_EBI_MemoryCharacteristicsSet Function
C
void PLIB_EBI_MemoryCharacteristicsSet(
EBI_MODULE_ID index,
int ChipSelectNumber,
EBI_MEMORY_TYPE MemoryType,
EBI_MEMORY_SIZE MemorySize,
EBI_CS_TIMING TimingReg
);
Description
EBIMSKx -SRF name index - Identifier for the device instance.
ChipSelectNumber - Identifies what chip select address pin is being assigned an address
MEMTYPE - in datasheet.
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MEMSIZE - in the datasheet.
REGSEL - in the datasheet.
Preconditions
EBI has to be supported by the microcontroller.
Parameters
Parameters Description
index Identifier for the device instance.
ChipSelectNumber Identifies which chip select pin
MemoryType Identifies which memory is used
MemorySize a enum type, sets the size of the attached memory device
TimingRegSet Identifies the timing register
Returns
None.
Remarks
None.
5.6.7.7.3.10 PLIB_EBI_MemoryPagingSet Function
C
void PLIB_EBI_MemoryPagingSet(
EBI_MODULE_ID index,
int ChipSelectNumber,
bool PageMode,
EBI_PAGE_SIZE MemoryPageSize
);
Description
PAGESIZE in datasheet.
PAGEMODE in datasheet.
1 = Device supports Page mode
0 = Device does not support Page mode
Parameters
Parameters Description
index Identifier for the device instance
ChipSelectNumber Sets for that Chip Select pin [0:3]
PageMode enable or disable page mode
MemoryPageSize size of memory pages
Returns
none
Remarks
None.
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5.6.7.7.3.11 PLIB_EBI_MemoryTimingConfigSet Function
C
void PLIB_EBI_MemoryTimingConfigSet(
EBI_MODULE_ID index,
int CS_Timing_Reg,
int PageReadTime,
int DataTurnAroundTime,
int WritePulseWidth,
int AddressHoldTime,
int AddressSetupTime,
int ReadCycleTime
);
Description
SFR = EBISMT[0:2] TPRC - in datasheet. Read cycle time = TPRC + 1cycle.
TBTA - in the datasheet. Clock cycles (0-7) for static memory between read-to-write, write-to-read, and read-to-read when Chip
Select changes.
TWP in the datasheet. Write Pulse with = TWP + 1 clock cycle.
TWR - in datasheet. Write Address/Data Hold Time
TAS - in datasheet. Clock cycles for address setup time. A value of ‘0’ is only valid in the case of SSRAM.
TRC - in datasheet. Read Cycle time = TRC +1 clock cycle.
Preconditions
EBI has to be supported by the microcontroller.
Parameters
Parameters Description
index Identifier for the device instance
CS_Timing_Reg Identifies which chip select Timing register to use EBISMT[0:2]
PageReadTime The clock cycle needed for a Memory Page read
DataTurnAroundTime Time between read-to-write, write-to-read, and read-to-read when Chip Select
changes state.
WritePulseWidth The clock cycles needed for a memory write
AddressHoldTime The clock time needed for the address bus to hold
AddressSetupTime The time needed for the address to settle
ReadCycleTime _nt_
Returns
None.
Remarks
None.
5.6.7.7.3.12 PLIB_EBI_ReadyPin1ConfigSet Function
C
void PLIB_EBI_ReadyPin1ConfigSet(
EBI_MODULE_ID index,
bool ReadyPin1Enable,
bool ReadyPin1Invert
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);
Description
EBIRDYEN1 - in datasheet.
EBIRDY1 Pin Enable bit, 1 = pin is enabled for use by the EBI module, 0 = pin is available for general use
EBIRDYINV1 - in datasheet.
EBIRDYx Inversion Control bit 1 = Invert EBIRDYx pin before use 0 = Do not invert EBIRDYx pin before use.
Parameters
Parameters Description
index Identifier for the device instance
ReadyPin1Invert Identifies the on/off for invert
ReadyPin1Enable Identifies if this pin is used by the control part
Returns
None.
Remarks
None.
5.6.7.7.3.13 PLIB_EBI_ReadyPin2ConfigSet Function
C
void PLIB_EBI_ReadyPin2ConfigSet(
EBI_MODULE_ID index,
bool ReadyPin2Enable,
bool ReadyPin2Invert
);
Description
EBIRDYEN2 - in datasheet.
EBIRDY2 Pin Enable bit, 1 = pin is enabled for use by the EBI module, 0 = pin is available for general use
EBIRDYINV2 - in datasheet.
EBIRDYx Inversion Control bit 1 = Invert EBIRDYx pin before use 0 = Do not invert EBIRDYx pin before use.
Parameters
Parameters Description
index Identifier for the device instance
ReadyPin2Invert Identifies the on/off for invert
ReadyPin2Enable Identifies if this pin is used by the control part
Returns
None.
Remarks
None.
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5.6.7.7.3.14 PLIB_EBI_ReadyPin3ConfigSet Function
C
void PLIB_EBI_ReadyPin3ConfigSet(
EBI_MODULE_ID index,
bool ReadyPin3Enable,
bool ReadyPin3Invert
);
Description
EBIRDYEN2 - in datasheet.
EBIRDY2 Pin Enable bit, 1 = pin is enabled for use by the EBI module, 0 = pin is available for general use
EBIRDYINV2 - in datasheet.
EBIRDYx Inversion Control bit 1 = Invert EBIRDYx pin before use 0 = Do not invert EBIRDYx pin before use.
Parameters
Parameters Description
index Identifier for the device instance
ReadyPin3Invert Identifies the on/off for invert
ReadyPin3Enable Identifies if this pin is used by the control part
Returns
None.
Remarks
None.
5.6.7.7.3.15 PLIB_EBI_ReadyPinSensSet Function
C
void PLIB_EBI_ReadyPinSensSet(
EBI_MODULE_ID index,
bool SensitivityControl
);
Description
EBIRDYLVL - in datasheet.
EBI Ready Pin trigger detection 1 = Use level detect for EBIRDYx pins, 0 = Use edge detect for EBIRDYx pins
Parameters
Parameters Description
index Identifier for the device instance
SensitivityControl for selection edge or level detection
Returns
None.
Remarks
None.
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5.6.7.7.3.16 PLIB_EBI_StaticMemoryWidthRegisterSet Function
C
void PLIB_EBI_StaticMemoryWidthRegisterSet(
EBI_MODULE_ID index,
int RegstierNumber,
EBI_STATIC_MEMORY_WIDTH StaticMemoryWidthRegister
);
Description
SMDWIDTH - in the datasheet.
000 = 16 bits
100 = 8 bits
Parameters
Parameters Description
index Identifier for the device instance
RegstierNumber the ID for the register being set StaticMemoryWidthRegister -identifies weither a
bus width of 8bit or 16bits
Returns
None.
Remarks
None.
5.6.7.7.3.17 PLIB_EBI_WriteOutputControlSet Function
C
void PLIB_EBI_WriteOutputControlSet(
EBI_MODULE_ID index,
bool WriteEnable,
bool OutputEnable
);
Description
EBIWEEN - in datasheet.
EBIWE, This controls the Enable bit for the Write Enable Pin.
1 = pin is enabled for use by the EBI module, 0 = pin is available for general use.
EBIOEEN - in datasheet.
EBIOE, This controls the enable bit for the Output Enable Pin.
1 = pin is enabled for use by the EBI module, 0 = pin is available for general use.
Parameters
Parameters Description
index Identifier for the device instance
WriteEnable for enabling Write Enable
OutputEnable for enabling Output Enable
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Returns
None.
Remarks
None.
5.6.7.7.3.18 PLIB_EBI_ControlEnableSet Function
C
void PLIB_EBI_ControlEnableSet(
EBI_MODULE_ID index,
bool EnableBit
);
Description
EBIPINEN - in datasheet.
EBI Pin Enable bit, 1 = EBI controls access of pins shared with PMP 0 = Pins shared with EBI are available for general use.
Parameters
Parameters Description
index Identifier for the device instance
EnableBit Identifes the enable bit
Returns
None
Remarks
None.
5.6.7.7.3.19 PLIB_EBI_ReadyModeSet Function
C
void PLIB_EBI_ReadyModeSet(
EBI_MODULE_ID index,
bool ReadyPin0,
bool ReadyPin1,
bool ReadyPin2
);
Description
RDYMODE- The device associated with EBI is a data-ready device, and will use the READY pin.
1 = Ready input is used 0 = Ready input is not used
Parameters
Parameters Description
index Identifier for the device instance ReadyPin0 ReadyPin1 ReadyPin2
ReadyPin(x) Identifies the ready pin (1-3) that
Returns
None.
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Remarks
None.
5.6.7.7.4 Existence Functions
5.6.7.7.4.1 PLIB_EBI_ExistsAddressHoldTime Function
C
bool PLIB_EBI_ExistsAddressHoldTime(
EBI_MODULE_ID index
);
Description
This function identifies whether the AddressHoldTime feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
• PLIB_EBI_AddressHoldTimeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AddressHoldTime feature is supported on the device
• false - The AddressHoldTime feature is not supported on the device
Remarks
None.
5.6.7.7.4.2 PLIB_EBI_ExistsAddressPinEnableBits Function
C
bool PLIB_EBI_ExistsAddressPinEnableBits(
EBI_MODULE_ID index
);
Description
This function identifies whether the AddressPinEnableBits feature is available on the EBI module. When this function returns
true, these functions are supported on the device:
• PLIB_EBI_AddressPinEnableBitsSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The AddressPinEnableBits feature is supported on the device
• false - The AddressPinEnableBits feature is not supported on the device
Remarks
None.
5.6.7.7.4.3 PLIB_EBI_ExistsAddressSetupTime Function
C
bool PLIB_EBI_ExistsAddressSetupTime(
EBI_MODULE_ID index
);
Description
This function identifies whether the AddressSetupTime feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
• PLIB_EBI_AddressSetupTimeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AddressSetupTime feature is supported on the device
• false - The AddressSetupTime feature is not supported on the device
Remarks
None.
5.6.7.7.4.4 PLIB_EBI_ExistsBaseAddress Function
C
bool PLIB_EBI_ExistsBaseAddress(
EBI_MODULE_ID index
);
Description
This function identifies whether the Base_Address feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
• PLIB_EBI_BaseAddressSet
• PLIB_EBI_BaseAddressGet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Base_Address feature is supported on the device
• false - The Base_Address feature is not supported on the device
Remarks
None.
5.6.7.7.4.5 PLIB_EBI_ExistsByteSelectPin Function
C
bool PLIB_EBI_ExistsByteSelectPin(
EBI_MODULE_ID index
);
Description
This function identifies whether the ByteSelectPin feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
• PLIB_EBI_ByteSelectPinSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ByteSelectPin feature is supported on the device
• false - The ByteSelectPin feature is not supported on the device
Remarks
None.
5.6.7.7.4.6 PLIB_EBI_ExistsChipSelectEnable Function
C
bool PLIB_EBI_ExistsChipSelectEnable(
EBI_MODULE_ID index
);
Description
This function identifies whether the ChipSelectEnable feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
• PLIB_EBI_ChipSelectEnableSet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipSelectEnable feature is supported on the device
• false - The ChipSelectEnable feature is not supported on the device
Remarks
None.
5.6.7.7.4.7 PLIB_EBI_ExistsControlEnable Function
C
bool PLIB_EBI_ExistsControlEnable(
EBI_MODULE_ID index
);
Description
This function identifies whether the ControlEnable feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
• PLIB_EBI_ControlEnableSet
• PLIB_EBI_ControlEnableGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ControlEnable feature is supported on the device
• false - The ControlEnable feature is not supported on the device
Remarks
None.
5.6.7.7.4.8 PLIB_EBI_ExistsDataEnable Function
C
bool PLIB_EBI_ExistsDataEnable(
EBI_MODULE_ID index
);
Description
This function identifies whether the DataEnable feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
• PLIB_EBI_DataEnableSet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataEnable feature is supported on the device
• false - The DataEnable feature is not supported on the device
Remarks
None.
5.6.7.7.4.9 PLIB_EBI_ExistsDataTurnAroundTime Function
C
bool PLIB_EBI_ExistsDataTurnAroundTime(
EBI_MODULE_ID index
);
Description
This function identifies whether the DataTurnAroundTime feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
• PLIB_EBI_DataTurnAroundTimeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataTurnAroundTime feature is supported on the device
• false - The DataTurnAroundTime feature is not supported on the device
Remarks
None.
5.6.7.7.4.10 PLIB_EBI_ExistsFlashPowerDownMode Function
C
bool PLIB_EBI_ExistsFlashPowerDownMode(
EBI_MODULE_ID index
);
Description
This function identifies whether the FlashPowerDownMode feature is available on the EBI module. When this function returns
true, these functions are supported on the device:
• PLIB_EBI_FlashPowerDownModeSet
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• PLIB_EBI_FlashPowerDownModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FlashPowerDownMode feature is supported on the device
• false - The FlashPowerDownMode feature is not supported on the device
Remarks
None.
5.6.7.7.4.11 PLIB_EBI_ExistsFlashResetPin Function
C
bool PLIB_EBI_ExistsFlashResetPin(
EBI_MODULE_ID index
);
Description
This function identifies whether the FlashResetPin feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
• PLIB_EBI_FlashResetPinSet
• PLIB_EBI_FlashResetPinGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FlashResetPin feature is supported on the device
• false - The FlashResetPin feature is not supported on the device
Remarks
None.
5.6.7.7.4.12 PLIB_EBI_ExistsFlashTiming Function
C
bool PLIB_EBI_ExistsFlashTiming(
EBI_MODULE_ID index
);
Description
This function identifies whether the FlashTiming feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
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• PLIB_EBI_FlashTimingSet
• PLIB_EBI_FlashTimingGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FlashTiming feature is supported on the device
• false - The FlashTiming feature is not supported on the device
Remarks
None.
5.6.7.7.4.13 PLIB_EBI_ExistsMemoryCharacteristics Function
C
bool PLIB_EBI_ExistsMemoryCharacteristics(
EBI_MODULE_ID index
);
Description
This function identifies whether the MemoryCharacteristics feature is available on the EBI module. When this function returns
true, these functions are supported on the device:
• PLIB_EBI_MemoryCharacteristicsSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MemoryCharacteristics feature is supported on the device
• false - The MemoryCharacteristics feature is not supported on the device
Remarks
None.
5.6.7.7.4.14 PLIB_EBI_ExistsMemoryPaging Function
C
bool PLIB_EBI_ExistsMemoryPaging(
EBI_MODULE_ID index
);
Description
This function identifies whether the MemoryPaging feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
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• PLIB_EBI_MemoryPagingSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MemoryPaging feature is supported on the device
• false - The MemoryPaging feature is not supported on the device
Remarks
None.
5.6.7.7.4.15 PLIB_EBI_ExistsMemoryTimingConfig Function
C
bool PLIB_EBI_ExistsMemoryTimingConfig(
EBI_MODULE_ID index
);
Description
This function identifies whether the MemoryTimingConfig feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
• PLIB_EBI_MemoryTimingConfigSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MemoryTimingConfig feature is supported on the device
• false - The MemoryTimingConfig feature is not supported on the device
Remarks
None.
5.6.7.7.4.16 PLIB_EBI_ExistsPageMode Function
C
bool PLIB_EBI_ExistsPageMode(
EBI_MODULE_ID index
);
Description
This function identifies whether the PageMode feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
• PLIB_EBI_PageModeGet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PageMode feature is supported on the device
• false - The PageMode feature is not supported on the device
Remarks
None.
5.6.7.7.4.17 PLIB_EBI_ExistsPageReadTime Function
C
bool PLIB_EBI_ExistsPageReadTime(
EBI_MODULE_ID index
);
Description
This function identifies whether the PageReadTime feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
• PLIB_EBI_PageReadCycleTimeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PageReadTime feature is supported on the device
• false - The PageReadTime feature is not supported on the device
Remarks
None.
5.6.7.7.4.18 PLIB_EBI_ExistsReadCycleTime Function
C
bool PLIB_EBI_ExistsReadCycleTime(
EBI_MODULE_ID index
);
Description
This function identifies whether the ReadCycleTime feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
• PLIB_EBI_ReadCycleTimeGet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReadCycleTime feature is supported on the device
• false - The ReadCycleTime feature is not supported on the device
Remarks
None.
5.6.7.7.4.19 PLIB_EBI_ExistsReadyMode Function
C
bool PLIB_EBI_ExistsReadyMode(
EBI_MODULE_ID index
);
Description
This function identifies whether the ReadyMode feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
• PLIB_EBI_ReadyModeSet
• PLIB_EBI_ReadyModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReadyMode feature is supported on the device
• false - The ReadyMode feature is not supported on the device
Remarks
None.
5.6.7.7.4.20 PLIB_EBI_ExistsReadyPin1Config Function
C
bool PLIB_EBI_ExistsReadyPin1Config(
EBI_MODULE_ID index
);
Description
This function identifies whether the ReadyPin1Config feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
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• PLIB_EBI_ReadyPin1ConfigSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReadyPin1Config feature is supported on the device
• false - The ReadyPin1Config feature is not supported on the device
Remarks
None.
5.6.7.7.4.21 PLIB_EBI_ExistsReadyPin2Config Function
C
bool PLIB_EBI_ExistsReadyPin2Config(
EBI_MODULE_ID index
);
Description
This function identifies whether the ReadyPin2Config feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
• PLIB_EBI_ReadyPin2ConfigSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReadyPin2Config feature is supported on the device
• false - The ReadyPin2Config feature is not supported on the device
Remarks
None.
5.6.7.7.4.22 PLIB_EBI_ExistsReadyPin3Config Function
C
bool PLIB_EBI_ExistsReadyPin3Config(
EBI_MODULE_ID index
);
Description
This function identifies whether the ReadyPin3Config feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
• PLIB_EBI_ReadyPin3ConfigSet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReadyPin3Config feature is supported on the device
• false - The ReadyPin3Config feature is not supported on the device
Remarks
None.
5.6.7.7.4.23 PLIB_EBI_ExistsReadyPinSens Function
C
bool PLIB_EBI_ExistsReadyPinSens(
EBI_MODULE_ID index
);
Description
This function identifies whether the ReadyPinSens feature is available on the EBI module. When this function returns true, these
functions are supported on the device:
• PLIB_EBI_ReadyPinSensSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReadyPinSens feature is supported on the device
• false - The ReadyPinSens feature is not supported on the device
Remarks
None.
5.6.7.7.4.24 PLIB_EBI_ExistsStaticMemoryWidthRegister Function
C
bool PLIB_EBI_ExistsStaticMemoryWidthRegister(
EBI_MODULE_ID index
);
Description
This function identifies whether the StaticMemoryWidthRegister feature is available on the EBI module. When this function
returns true, these functions are supported on the device:
• PLIB_EBI_StaticMemoryWidthRegisterSet
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• PLIB_EBI_StaticMemoryWidthRegisterGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StaticMemoryWidthRegister feature is supported on the device
• false - The StaticMemoryWidthRegister feature is not supported on the device
Remarks
None.
5.6.7.7.4.25 PLIB_EBI_ExistsWriteOutputControl Function
C
bool PLIB_EBI_ExistsWriteOutputControl(
EBI_MODULE_ID index
);
Description
This function identifies whether the WriteOutputControl feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
• PLIB_EBI_WriteOutputControlSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WriteOutputControl feature is supported on the device
• false - The WriteOutputControl feature is not supported on the device
Remarks
None.
5.6.7.7.4.26 PLIB_EBI_ExistsWritePulseWidth Function
C
bool PLIB_EBI_ExistsWritePulseWidth(
EBI_MODULE_ID index
);
Description
This function identifies whether the WritePulseWidth feature is available on the EBI module. When this function returns true,
these functions are supported on the device:
• PLIB_EBI_WritePulseWidthGet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WritePulseWidth feature is supported on the device
• false - The WritePulseWidth feature is not supported on the device
Remarks
None.
5.6.7.8 Files
Files
Name Description
plib_ebi.h External Bus Interface (EBI) Peripheral Library Interface Header.
Description
5.6.7.8.1 plib_ebi.h
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
EBI Peripheral Library.
Functions
Name Description
PLIB_EBI_AddressHoldTimeGet This function returns the Address Hold Time
PLIB_EBI_AddressPinEnableBitsSet This function sets the address pins used for EBI.
PLIB_EBI_AddressSetupTimeGet This function is to get the set hold time
PLIB_EBI_BaseAddressGet This function returns the Base Address set for each chip select
PLIB_EBI_BaseAddressSet This function sets the Base address for physical memory at each
chip select
PLIB_EBI_ByteSelectPinSet This function sets the data Byte Select High [15:8] and Low [7:0]
enable pins for use.
PLIB_EBI_ChipSelectEnableSet This function sets the Chip Select pins for use with the EBI or GPIO.
PLIB_EBI_ControlEnableClear This function gets the set power down state.
PLIB_EBI_ControlEnableGet This function gets the status of the enable bit for EBI.
PLIB_EBI_ControlEnableSet This function sets the enable bit for turning on or off the EBI Bus.
PLIB_EBI_DataEnableSet This function sets the use of Data Byte Select Pins, High and Low,
for control with EBI or GPIO use.
PLIB_EBI_DataTurnAroundTimeGet This function gets the data turn time set for the EBI Bus.
PLIB_EBI_ExistsAddressHoldTime Identifies whether the AddressHoldTime feature exists on the EBI
module
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PLIB_EBI_ExistsAddressPinEnableBits Identifies whether the AddressPinEnableBits feature exists on the
EBI module
PLIB_EBI_ExistsAddressSetupTime Identifies whether the AddressSetupTime feature exists on the EBI
module
PLIB_EBI_ExistsBaseAddress Identifies whether the Base_Address feature exists on the EBI
module
PLIB_EBI_ExistsByteSelectPin Identifies whether the ByteSelectPin feature exists on the EBI module
PLIB_EBI_ExistsChipSelectEnable Identifies whether the ChipSelectEnable feature exists on the EBI
module
PLIB_EBI_ExistsControlEnable Identifies whether the ControlEnable feature exists on the EBI
module
PLIB_EBI_ExistsDataEnable Identifies whether the DataEnable feature exists on the EBI module
PLIB_EBI_ExistsDataTurnAroundTime Identifies whether the DataTurnAroundTime feature exists on the
EBI module
PLIB_EBI_ExistsFlashPowerDownMode Identifies whether the FlashPowerDownMode feature exists on the
EBI module
PLIB_EBI_ExistsFlashResetPin Identifies whether the FlashResetPin feature exists on the EBI
module
PLIB_EBI_ExistsFlashTiming Identifies whether the FlashTiming feature exists on the EBI module
PLIB_EBI_ExistsMemoryCharacteristics Identifies whether the MemoryCharacteristics feature exists on the
EBI module
PLIB_EBI_ExistsMemoryPaging Identifies whether the MemoryPaging feature exists on the EBI
module
PLIB_EBI_ExistsMemoryTimingConfig Identifies whether the MemoryTimingConfig feature exists on the EBI
module
PLIB_EBI_ExistsPageMode Identifies whether the PageMode feature exists on the EBI module
PLIB_EBI_ExistsPageReadTime Identifies whether the PageReadTime feature exists on the EBI
module
PLIB_EBI_ExistsReadCycleTime Identifies whether the ReadCycleTime feature exists on the EBI
module
PLIB_EBI_ExistsReadyMode Identifies whether the ReadyMode feature exists on the EBI module
PLIB_EBI_ExistsReadyPin1Config Identifies whether the ReadyPin1Config feature exists on the EBI
module
PLIB_EBI_ExistsReadyPin2Config Identifies whether the ReadyPin2Config feature exists on the EBI
module
PLIB_EBI_ExistsReadyPin3Config Identifies whether the ReadyPin3Config feature exists on the EBI
module
PLIB_EBI_ExistsReadyPinSens Identifies whether the ReadyPinSens feature exists on the EBI
module
PLIB_EBI_ExistsStaticMemoryWidthRegister Identifies whether the StaticMemoryWidthRegister feature exists on
the EBI module
PLIB_EBI_ExistsWriteOutputControl Identifies whether the WriteOutputControl feature exists on the EBI
module
PLIB_EBI_ExistsWritePulseWidth Identifies whether the WritePulseWidth feature exists on the EBI
module
PLIB_EBI_FlashPowerDownModeGet This function gets the set power down state.
PLIB_EBI_FlashPowerDownModeSet This function sets the pin state for flash devices on power down/reset
PLIB_EBI_FlashResetPinGet This function sets the the control use of Ready pin and the inverts
status
PLIB_EBI_FlashResetPinSet This function sets the the control use of Ready pin and the inverts
status
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PLIB_EBI_FlashTimingGet This function gets the set flash timing for external flash
PLIB_EBI_FlashTimingSet This function sets the timing for hold in reset for external flash
PLIB_EBI_MemoryCharacteristicsSet This function set the Memory Characteristics for Memory or attached
devices attached to that pin
PLIB_EBI_MemoryPagingSet This function sets the size of the memory page if paging is used.
PLIB_EBI_MemoryTimingConfigSet This function is to set the cycle time for page reading
PLIB_EBI_PageModeGet This function returns Paging mode settings
PLIB_EBI_PageReadCycleTimeGet This function returns the cycle time for a page read.
PLIB_EBI_PageSizeGet This function returns Paging mode settings
PLIB_EBI_ReadCycleTimeGet This function returns the read time in number of clock cycles
PLIB_EBI_ReadyModeGet This function returns whether or not the Ready Mode was set.
PLIB_EBI_ReadyModeSet This function sets the use of ready mode for each pin. The attached
device will either pull the ready pin high or low.
PLIB_EBI_ReadyPin1ConfigSet This function sets the the control use of Ready pin and the inverts
status.
PLIB_EBI_ReadyPin2ConfigSet This function sets the the control use of Ready pin and the inverts
status
PLIB_EBI_ReadyPin3ConfigSet This function sets the the control use of Ready pin and the inverts
status
PLIB_EBI_ReadyPinSensSet This function sets the the control use of Ready pin and the inverts
status
PLIB_EBI_StaticMemoryWidthRegisterGet This function get the width of the set data bus
PLIB_EBI_StaticMemoryWidthRegisterSet This function set the data width of static memory.
PLIB_EBI_WriteOutputControlSet This function sets the Write Enable & Output Enable control pins
PLIB_EBI_WritePulseWidthGet This function returns the set hold time in clock cycles.
File Name
plib_ebi.h
Company
Microchip Technology Inc.
5.6.8 Ethernet Peripheral Library
5.6.8.1 Introduction
Ethernet Peripheral Library
for
Microchip Microcontrollers
The Ethernet Peripheral Library provides a low-level abstraction of the Ethernet module in the Microchip family of
microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module without
interacting directly with the module's registers, thereby hiding the differences in microcontroller variations.
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Description
Overview
Ethernet is the most widely deployed network in offices and homes. Ethernet’s infrastructure, interoperability, and scalability
serve to ease development and facilitate communications to the device. Once equipment is connected to an Ethernet network, it
can be monitored or controlled through the internet with low latency – “real time” remote delivery.
The Ethernet Controller is a bus master module that interfaces with an off-chip PHY in order to implement a complete Ethernet
node in a system.
Following are some of the key features of this module:
• Supports 10/100 Mbps data transfer rates
• Supports Full-Duplex and Half-Duplex operation
• Supports Reduced Media Independent Interface (RMII) and Media Independent Interface (MII) PHY interface
• Supports MII Management (MIIM) PHY Management interface
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• Supports both manual and automatic flow control
• Supports Auto-MDIX and enabled PHYs
• RAM descriptor based DMA operation for both receive and transmit path
• Fully configurable interrupts
• Configurable receive packet filtering:
• CRC Check
• 64-byte Pattern Match
• Broadcast, Multicast and Unicast packets
• Magic Packet™
• 64-bit Hash Table
• Runt Packet
• Supports Packet Payload Checksum calculation
• Supports various hardware statistics counters
5.6.8.2 Release Notes
MPLAB Harmony Version: v0.70b Ethernet Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.8.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.6.8.4 Using the Library
This topic describes the basic architecture of the Ethernet Peripheral Library and provides information and examples on how to
use it.
Interface Header File: plib_eth.h
The interface to the Ethernet Peripheral Library is defined in the "plib_eth.h" header file. Any C language source (.c) file that uses
the Ethernet Peripheral Library should include "plib_eth.h".
Library File:
The Ethernet Peripheral Library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the Peripheral interacts with the framework.
5.6.8.4.1 Hardware Abstraction Model
This section describes how the low-level abstraction is modeled in the software and introduces the library interface. The interface
provided is a superset of all the functionality of the available Ethernet on the device. Refer to the specific data sheet or family
reference manual to determine the set of functions that are supported for each Ethernet module on your device.
Description
Hardware Model
This library provides the low-level abstraction of the Ethernet module on Microchip family of microcontrollers with a convenient C
language interface.
Ethernet Controller Block Diagram
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Note: For information on off-chip options to provide Ethernet functionality, refer to the specific device data sheet.
5.6.8.4.2 How the Library Works
This section provides information on the operation of the Ethernet Peripheral Library.
Description
The Peripheral Library is an abstraction of hardware which can be used to control hardware and obtain status. It is intended to
allow the programmer access to hardware registers without knowing the exact bit or register names which may vary on individual
devices. For example, instead of turning on the Ethernet module using:
ETHCON1bits.EON = 1; the programmer can turn on the Ethernet module using: PLIB_ETH_Enable(moduleId);. This allows the
programmer to use the same command for any device containing an Ethernet module without having to learn the individual
device register names.
Basic Overview
The Ethernet Controller provides the modules needed to implement a 10/100 Mbps Ethernet node using an external PHY chip.
To off-load the CPU from moving packet data to and from the module, internal descriptor-based DMA engines are included in the
controller.
The Ethernet Controller consists of the following modules:
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• Media Access Control (MAC) block: Responsible for implementing the MAC functions of the Ethernet IEEE 802.3 Specification
• Flow Control (FC) block, which provides:
• Manual flow control
• Automatic flow control
• Transmission of PAUSE frames
• Reception of PAUSE frame is handled within the MAC
• RX Filter (RXF) block: This module performs filtering on every receive packet to determine whether each packet should be
accepted or rejected and includes:
• CRC Check
• 64-byte Pattern Match
• Broadcast, Multicast and Unicast packets
• Magic Packet™
• 64-bit Hash Table
• Runt Packet
• TX DMA/TX BM Engine: The TX DMA and TX Buffer Management engines perform data transfers from the memory (using
descriptor tables) to the MAC Transmit Interface
• RX DMA/RX BM Engine: The RX DMA and RX Buffer Management engines transfer receive packets from the MAC to the
memory (using descriptor tables)
Basic Ethernet Controller Operation
The Ethernet Controller is enabled using PLIB_ETH_Enable and is disabled using PLIB_ETH_Disable. The Ethernet Controller
is disabled by default after any Reset. If the Ethernet Controller is disabled, all of the I/O pins used for the MII/RMII and MIIM
interfaces operate as port pins and are under the control of the respective PORTx latch bit and TRISx bit.
Disabling the controller resets the internal DMA state machines and all transmit and receive operations are aborted. The Special
Function Registers (SFRs) are still accessible and their values are preserved.
Clearing the ON bit while the Ethernet Controller is active will abort all pending operations and reset the peripheral as previously
defined.
Re-enabling the ON bit will restart the Ethernet Controller in its clean reset state while preserving the SFR values.
Ethernet Controller Section Block Diagram
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MAC Overview
The MAC sub-layer is part of the functionality described in the OSI model for the Data Link Layer. It defines a
medium-independent facility, built on the medium-dependent physical facility provided by the Physical Layer, and under the
access-layer-independent LLC sub-layer or other MAC client. It is applicable to a general class of local area broadcast media
suitable for use with the Carrier Sense Multiple Access with Collision Detection (CSMA/CD).
The CSMA/CD MAC sub-layer provides services to the MAC client required for the transmission and reception of frames. The
CSMA/CD MAC sub-layer makes a best effort to acquire the medium and transfer a serial stream of bits to the Physical Layer.
Although certain errors are reported to the client, error recovery is not provided by the MAC.
The following is a summary of the functional capabilities of the CSMA/CD MAC sub-layer as shown in the previous diagram.
• For Frame Transmission:
• Accepts data from the MAC client and constructs a frame
• Presents a bit-serial data stream to the Physical Layer for transmission on the medium
• In half-duplex mode, defers transmission of a bit-serial stream whenever the physical medium is busy
• It can append proper Frame Check Sequence (FCS) value to outgoing frames and verifies full octet boundary alignment
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• Delays transmission of frame bit stream for specified inter-frame gap period
• In half-duplex mode, halts transmission when collision is detected
• In half-duplex mode, schedules retransmission after a collision until a specified retry limit is reached
• In half-duplex mode, enforces collision to ensure propagation throughout network by sending jam message
• Prepends preamble and Start Frame Delimiter and appends FCS to all frame Appends PAD field for frames whose data
length is less than a minimum value
• For Frame Reception:
• Receives a bit-serial data stream from the Physical Layer
• Presents the received frames to the MAC client (broadcast, multicast, unicast frames, etc.)
• Checks incoming frames for transmission errors by way of FCS and verifies octet boundary alignment
• Removes preamble, Start Frame Delimiter and PAD field (if necessary) from received frames
• Implements the MII Management block that provides control/status connection to the external MII PHY
Note: Not all modes are available on all devices, please refer to the specific device data sheet to determine the set of modes
supported for your device. In addition, refer to the "Ethernet" section in the family reference manual or the Ethernet Driver
Library for more information.
5.6.8.4.2.1 Ethernet Frame Overview
Ethernet Frame Overview
IEEE 802.3-compliant Ethernet frames (packets) are between 64 and 1518 bytes long (Preamble and Start -of-Frame Delimiter
not included). Frames containing less than 64 bytes are known as “runt” frames, while frames containing more than 1518 bytes
are known as “huge” frames.
An Ethernet frame is made up of the following fields:
• Start-of-Stream/Preamble
• Start-of-Frame Delimiter (SFD)
• Destination MAC address (DA)
• Source MAC address (SA)
• Type/Length field
• Data Payload
• Optional Padding field
• Frame Check Sequence (FCS)
• Traffic on the actual physical cable
Please refer to the IEEE 802.3 Specification for detailed information about the Ethernet protocol.
5.6.8.4.2.2 Ethernet Controller Operation
Basic Ethernet Controller Operation
The Ethernet Controller is enabled using PLIB_ETH_Enable and is disabled using PLIB_ETH_Disable. The Ethernet Controller
is disabled by default after any Reset. If the Ethernet Controller is disabled, all of the I/O pins used for the MII/RMII and MIIM
interfaces operate as port pins and are under the control of the respective PORT latch bit and TRIS bit.
Disabling the controller resets the internal DMA state machines and all transmit and receive operations are aborted. The SFRs
are still accessible and their values preserved.
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Clearing the ON bit while the Ethernet Controller is active will abort all pending operations and reset the peripheral as previously
defined.
Re-enabling the ON bit will restart the Ethernet Controller in its clean reset state while preserving the SFR values.
5.6.8.4.2.3 Media Independent Interface (MII)
This section describes the Media Independent Interface (MII).
Description
Media Independent Interface (MII)
The Media Independent Interface (MII) is a standard interconnection between the MAC and the PHY for communicating TX and
RX frame data. This MII has the following important characteristics:
• Capable of supporting 10/100 Mbps rates for data transfer, and offers support for management functions
• Provides independent four bit wide transmit and receive data paths
• Uses TTL signal levels, compatible with common digital CMOS processes
• Provides full-duplex operation
In 10 Mbps mode, the MII runs at 2.5 MHz; in 100 Mbps mode it runs at 25 MHz. PHYs that provide MII are not required to
support both data rates, and may support either one or both.
5.6.8.4.2.4 Reduced Media Independent Interface (RMII)
This section describes the Reduced Media Independent Interface (RMII).
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Description
Reduced Media Independent Interface (RMII)
The management interface (MDIO/MDC) is assumed to be identical to that defined in MII.
The RMII has the following characteristics:
• Capable of supporting 10 Mbps and 100 Mbps data rates
• Single clock reference for both MAC and the PHY (can be sourced from the MAC or from an external source)
• Provides independent 2 bit wide transmit and receive data paths
• Uses TTL signal levels, compatible with common digital CMOS processes
• Provides full-duplex operation
• The interface runs at 50 MHz
5.6.8.4.2.5 Flow Control Overview
Flow Control Overview
Ethernet flow control consists of the ability to send and receive PAUSE frames, which cause the receiving node to stop
transmitting for a specific amount of time.
On the transmit side, the Flow Control (FC) block handles the hardware handshaking between the MAC and the CPU when the
transmit flow control is enabled. Flow control for the received packets is part of the MAC functionality.
The PIC32 MAC supports both Symmetric PAUSE and Asymmetric PAUSE as described in Clause 28, Table 28B-2, and Clause
31 and Annex 31B of the IEEE 802.3 Specification.
The FC block supports two modes of operation: manual and automatic. In addition, the mode of transmission (Full-Duplex or
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Half-Duplex) programmed into the MAC registers, is used by the FC block.
5.6.8.4.2.6 Receive Filtering Overview
Receive Filtering Overview
The Receive Filter (RXF) block examines all incoming receive packets and accepts or rejects the packet, based on
user-selectable filters. The following RX filters are supported:
• CRC Error Acceptance Filter
• Runt Error Acceptance Filter
• CRC Check Rejection Filter
• Runt Rejection Filter
• Unicast Acceptance Filter
• Not Me Unicast Acceptance Filter
• Multicast Acceptance Filter
• Broadcast Acceptance Filter
• Hash Table Acceptance Filter
• Magic Packet Acceptance Filter
• Pattern Match Acceptance Filter with logical inversion
5.6.8.4.2.7 Ethernet DMA and Buffer Management Engine
Ethernet DMA and Buffer Management Engines
To reduce the overhead on the CPU to move the packet data between data memory and the Ethernet controller, internal receive
(RX) and transmit (TX) DMA engines are integrated into the module. The DMA engines are responsible for transferring data from
system memory to the MAC for transmit packets and for transferring data from the MAC to system memory for receive packets.
The DMA engines each have access to the system memory by acting as two different bus masters, one bus master for transmit
and one for receive.
The DMA engines use separate Ethernet Descriptor Tables (EDTs) for TX and RX operations to determine where the TX/RX
packet buffer resides in the system memory.
Both transmit and receive descriptors, called Ethernet Descriptors (EDs), used by the DMA engines have a similar format, with
only the status word formats being different.
Refer to the "Ethernet" section in the family reference manual for more information.
5.6.8.4.3 Sample Code
This section provides information for initialization, transmit, and receive using code samples.
Description
Sample Code
The basic functionality of the Ethernet Peripheral Library is grouped into these sections:
• Initialization
• Transmit
• Receive
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For a properly functioning Ethernet port, development of a data queue and use of interrupts will be necessary.
For this additional functionality, see the "Ethernet" section in the family reference manual or the Ethernet Driver Library for more
information.
Initialization Sequence
The Ethernet Controller is enabled using PLIB_ETH_Enable and is disabled using PLIB_ETH_Disable. The Ethernet Controller
is disabled by default after any Reset.
After being Enabled, disabling the controller resets the internal DMA state machines and all transmit and receive operations are
aborted. All registers remain accessible and their values are preserved. It is important to reset the PHY and MII Management
registers to ensure the PHY is in a known initialized state.
Before enabling the module for transmitting or receiving packets, there are several registers that must be initialized. To initialize
the Ethernet Controller to receive and transmit, Microchip recommends the following sequence:
1. Begin with the module.
• Disable the CPU Ethernet interrupt
• Turn the Ethernet Controller off
• Disable receive
• Disable transmit
• Wait until the Ethernet module is no longer busy
• Disable all Ethernet Interrupts
• Clear the Ethernet Interrupt Pending Flag(s)
• Clear the transmit and receive start addresses
2. MAC initialize.
• Reset the MAC
• A configuration fuse (FETHIO) setting shows which pins will be used for connection to the PHY
• A configuration fuse (FMIIEN) settings shows whether MII or RMII will be used
3. PHY Initialize is PHY dependent. Common procedures (which may vary by PHY vender) include the following:
• Reset PHY (using Control Register 0)
• Set the MII/RMII operation mode
• Set the normal, swapped, or auto (preferred)MDIX
• Check the PY capabilities (using Status Register 1)
• Preferably the auto-negotiation should be selected if the PHY supports it.
• Expose the supported capabilities (extended Register 4)
• Start the negotiation (using Control Register 0)
• wait for the negotiation to complete and get the link partner capabilities (extended Register 5)
• negotiation result (vendor-specific register)
• If auto-negotiation is not supported (or not selected)
• update the PHY Duplex and speed settings (use Control Register 0 or vender-specific register)
4. MAC Configuration
• Enable MAC receive and pause both transmit and receive direction control frames.
• Select the desired auto-padding, duplex, huge frame, and CRC capabilities.
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• Program back-to-back inter-packet gap and non-back-to-back interpacket gap.
• Program collision window and maximum retransmissions.
• Set Maximum frame length.
• Optionally set the station MAC address(es) (or let them default to the factory value).
5. Continue Ethernet Controller initialization:
• If planning to turn on flow control, update the Pause Timer Value
• If using auto flow control, setup the full/empty watermarks and enable it
• Set the receive filters
• Set receive buffer size - using packets that are too small impacts performance
• Prepare the list/ring of transmit descriptors - refer to the device data sheet for more information
• Prepare the list of receive descriptors populated with valid buffers for messages to be received - refer to the device data sheet
for more information
• Update the transmit buffer start address and the receive buffer start address
• Enable the Ethernet Controller and wait until the module is ready
• Enable Ethernet Receive.
Receive Loop
1. Wait until the receive buffer count has been incremented.
2. Inspect the receive descriptor to see whether it is still owned by the Ethernet Module.
3. If the receive descriptor is still owned by the Ethernet module, nothing has been received. Loop to 1.
4. Otherwise, a message was received and software has control of the memory where it is stored.
5. Extract a message and do something with it.
6. Reinitialize buffer descriptor and return receive buffer to list and decrement the receive packet buffer count.
7. Loop.
Transmit Loop
1. Software writes the packet data to packet data memory. A pointer to the packet data is inserted into the transmit buffer
descriptor.
2. Update the necessary number of transmit descriptors, starting from the head of the list - setting the data buffer address (large
packet fragmentation will impact performance).
3. Update the byte count for each descriptor with the number of bytes contained in each buffer.
4. Set the flag in each transmit descriptor that belongs to the packet to give the descriptor to the Ethernet module for
transmission.
5. Enable the transmission.
6. Wait until the Ethernet module returns the transmit buffer descriptor ownership to software.
7. Insect the results of the transmission.
8. Loop.
The packet transmit process is as follows:
1. Software writes the packet data to a packet buffer in data memory and programs a buffer descriptor entry to point to the
packet data buffer. The buffer descriptor is used to define the Transmission Packet data buffer location and length, and its
address is written to the Ethernet Controller.
2. Software then calls the TransmitRequestToSendEnable function, which starts the TX DMA and TXBM logic.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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3. After the TX DMA engine reads the DATA_BUFFER_ADDRESS value, the engine will begin reading the packet data from the
location read from the descriptor.
4. The TXBM indicates the start-of-frame to the MAC and transmits the entire frame data from the transmit buffer, until the end
address is reached. The TXBM simply transmits from the start address until the specified number of bytes has been
transmitted to the MAC transmit interface.
5. The MAC can retry a transmission due to an early collision.
6. The MAC can abort a transmission due to a late collision, excessive collisions or excessive defers. This condition is signaled
by TXABORT bit (ETHIRQ<2>).
7. Once transmission has completed, the TX DMA engine stores the relevant bits of the TSV into the first descriptor entry of the
packet.
8. After the packet has been transmitted, all the descriptors used for the transmission are released to the software via the EOWN
bits being cleared.
9. If more valid TX descriptors are available (EOWN = 1), the DMA engine will go back to step 3 to begin the next packet’s
transmission. Otherwise, if the next descriptor is still owned by hardware (EOWN = 0), transmission will halt and wait for the
software to set the TXRTS bit again.
Note that any collision that occurs within the CWINDOW bit (EMAC1CLRT<8:14>) boundary is an early collision and results in a
Retry operation. A collision that happens beyond the CWINDOW boundary will be treated as a late collision and will cause an
abort. The CWINDOW bit in the EMAC1CLRT register is typically set to 64 bytes. An abort condition can also result from
reaching the maximum collision count RETX bit (EMAC1CLRT<0:3>) for a packet trying to be sent.
See the "Ethernet" section in the family reference manual or the Ethernet Driver Library for more information.
5.6.8.4.3.1 Initialization
#include "plib_eth.h"
/*******************************************************************************
*/
void my_ETH_Initialize(ETH_MODULE_ID id)
{
//Disable System (CPU) Interrupt associated with Ethernet Peripheral
// using the Interrupt Peripheral Library
// Example: PLIB_INT_SourceDisable(PLIB_INT_SOURCE_ETH_1);
//Disable Ethernet Peripheral in case it was previously enabled
PLIB_ETH_Disable(ETH_MODULE_ID1);
//Disable any Ethernet Controller interrupt generation:
PLIB_ETH_InterruptSourceDisable(ETH_MODULE_ID1, ETH_ALL_INTERRUPT_SOURCES);
PLIB_ETH_RxDisable(ETH_MODULE_ID1);
PLIB_ETH_TxRTSDisable(ETH_MODULE_ID1);
while (PLIB_ETH_EthernetIsBusy(ETH_MODULE_ID1)) {/*wait*/ }
//Clear the System Interrupt Flag associated with Ethernet Peripheral
// using the Interrupt Peripheral Library
// Example: PLIB_INT_SourceFlagClear(PLIB_INT_SOURCE_ETH_1);
/////////////////////////////////////////////////
//MAC Initialize
PLIB_ETH_MIIResetEnable(ETH_MODULE_ID1);
PLIB_ETH_MIIResetDisable(ETH_MODULE_ID1);
//A configuration fuse (FETHIO) setting shows which digital pins need to be configured
if (CONFIGURATION_FUSE_PRIMARY_ETH_PINS==1)
{
ConfigurePrimaryEthernetPinsAsDigital();
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}
else //(CONFIGURATION_FUSE_PRIMARY_ETH_PINS==0)
{
ConfigureAlternateEthernetPinsAsDigital();
}
//A configuration fuse (FMIIEN) settings shows which digital pins need to be configured
if (CONFIGURATION_FUSE_MII_STYLE==RMII)
{
PLIB_ETH_RMIIResetEnable(ETH_MODULE_ID1);
PLIB_ETH_RMIIResetDisable(ETH_MODULE_ID1);
PLIB_ETH_RMIISpeedSet(ETH_MODULE_ID1, ETH_RMII_100Mps);
}
PLIB_ETH_MIIResetEnable(ETH_MODULE_ID1);
PLIB_ETH_MIIResetDisable(ETH_MODULE_ID1);
PLIB_ETH_MIIMClockSet(ETH_MODULE_ID1, ETH_MII_SYSCLK_DIV_BY_10);
/////////////////////////////////////////////////
//PHY Initialize is PHY dependent.
// Common procedures (which may vary by PHY vender) include the following:
//
//Reset PHY (using Control Register 0)
//Set the MII/RMII operation mode
//Set the normal, swapped, or auto (preferred)MDIX
//Check the PY capabilities (using Status Register 1)
//Preferably the auto-negotiation should be selected if the PHY supports it.
//Expose the supported capabilities (extended Register 4)
//Start the negotiation (using Control Register 0)
//wait for the negotiation to complete and get the link partner capabilities (extended
Register 5)
//negotiation result (vendor-specific register)
//If auto-negotiation is not supported (or not selected)
//update the PHY Duplex and speed settings (use Control Register 0 or vender-specific
register)
/////////////////////////////////////////////////
//MAC Configuration
PLIB_ETH_RxEnable(ETH_MODULE_ID1);
PLIB_ETH_TxPauseEnable(ETH_MODULE_ID1);
PLIB_ETH_RxPauseEnable(ETH_MODULE_ID1);
//Select the desired auto-padding, duplex, huge frame, and CRC capabilities
PLIB_ETH_AutoDetecPadSet(ETH_MODULE_ID1, ETH_AUTOPAD_BY_PKT_TYPE_ADD_CRC );
PLIB_ETH_FullDuplexEnable(ETH_MODULE_ID1); //or disable for half-duplex
PLIB_ETH_CRCEnable(ETH_MODULE_ID1); //or disable if EMAC does not add CRC when no padding
is necessary
PLIB_ETH_HugeFrameDisable(ETH_MODULE_ID1); //or enable to receive huge frames
//Program back-to-back inter-packet gap and non-back-to-back interpacket gap
PLIB_ETH_BackToBackIPGpSet(ETH_MODULE_ID1, 0x15 /*backToBackGapValue*/);
PLIB_ETH_NonBackToBackIPG1Set(ETH_MODULE_ID1, 0x0C /*nonBackToBackGap1Value*/);
PLIB_ETH_NonBackToBackIPG2Set(ETH_MODULE_ID1, 0x12 /*nonBackToBackGap2Value*/);
//Set Maximum frame length
PLIB_ETH_MaxFrameLengthSet(ETH_MODULE_ID1, 1527 /*maxFrameLenValue*/);
//Optionally set the station MAC address(es) (or let them default to the factory value)
PLIB_ETH_StationAddressSet(ETH_MODULE_ID1, 1, 0x13 /*stationAddr1Value*/);
/////////////////////////////////////////////////
//Continue Ethernet Controller Initialization
//Set receive buffer size - using packets that are too small impacts performance
PLIB_ETH_ReceiveBufferSizeSet(ETH_MODULE_ID1, 200 /*receiveBufSizeValue*/);
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//Prepare the list/ring of transmit descriptors - refer to the device data sheet for more
information
//Prepare the list of receive descriptors populated with valid buffers for messages to be
received - refer
//to the device data sheet for more information
//Update the transmit buffer start address and the receive buffer start address
PLIB_ETH_TxPacketDescAddrSet(ETH_MODULE_ID1, (uint8_t
*)0xadd1add0/*txPktDescStartAddrValue*/);
PLIB_ETH_RxPacketDescAddrSet(ETH_MODULE_ID1, (uint8_t
*)0xadd3add2/*rxPktDescStartAddrValue*/);
//If using auto flow control, setup the full/empty watermarks and enable it
PLIB_ETH_PauseTimerSet(ETH_MODULE_ID1, 0x64 /*pauseTimerValue*/);
PLIB_ETH_RxEmptyWmarkSet(ETH_MODULE_ID1, 0x3F/*emptyRxWatermarkValue*/);
PLIB_ETH_RxFullWmarkSet(ETH_MODULE_ID1, 0x10 /*fullRxWatermarkValue*/);
PLIB_ETH_AutoFlowControlEnable(ETH_MODULE_ID1);
PLIB_ETH_ReceiveFilterEnable(ETH_MODULE_ID1,
ETH_MULTICAST_FILT | // enable to accept multicast address
packets
ETH_BROADCAST_FILTER );// enable to accept all broadcast
address packets
PLIB_ETH_InterruptSourceDisable(ETH_MODULE_ID1, ETH_ALL_INTERRUPT_SOURCES);
//Enable the Ethernet Controller and wait until the module is ready
PLIB_ETH_Enable(ETH_MODULE_ID1);
while (PLIB_ETH_EthernetIsBusy(ETH_MODULE_ID1))
{
//Wait
}
PLIB_ETH_RxEnable(ETH_MODULE_ID1);
return (EXIT_SUCCESS);
}
5.6.8.4.3.2 Descriptor Table Example
typedef volatile struct
{
union
{ //Common to both Receive and Transmit
struct
{
unsigned: 7;
unsigned EOWN: 1; //0=Software owns, 1=Ethernet Controller owns
unsigned NPV: 1; //0=Next Desc follows this, 1=Next Desc pointed to by NEXT_ED
unsigned: 7;
unsigned bCount: 11;
unsigned: 3;
unsigned EOP: 1;
unsigned SOP: 1;
};
uint32_t w;
}; // descriptor header
//Common to both Receive and Transmit
uint8_t* pEDBuff; // pointer to data buffer
union
{ //This portion differs from Receive to Transmit
uint64_t RX_STATUS; //Receive Status
struct
{
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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unsigned RX_PKT_CHECKSUM: 16;
unsigned: 8;
unsigned RXF_RSV: 8;
unsigned RSV: 32;
};
uint64_t TX_STATUS; // Transmit Status
struct //Transmit Struct
{
unsigned TSV_TRANSMIT_BYTE_COUNT: 16;
unsigned TSV_TX_COLLISION_COUNT: 4;
unsigned TSV_TX_CRC_ERROR: 1;
unsigned TSV_TX_LENGTH_CHECK_ERROR: 1;
unsigned TSV_TX_DONE: 1;
unsigned TSV_TX_MULTICAST: 1;
unsigned TSV_TX_BROADCAST: 1;
unsigned TSV_TX_PACKET_DEFER: 1;
unsigned TSV_TX_EXCESSIVE_DEFER: 1;
unsigned TSV_TX_MAXIMUM_COLLISION: 1;
unsigned TSV_TX_LATE_COLLISION: 1;
unsigned TSV_TX_GIANT: 1;
unsigned TSV_TX_UNDER_RUN: 1;
unsigned TSV_TX_STATUS_VECTOR:1;
unsigned TSV_TOTAL_BYTES_TX_ON_WIRE: 16;
unsigned TSV_TX_CONTROL_FRAME: 1;
unsigned TSV_TX_PAUSE_CONTROL_FRAME: 1;
unsigned TSV_TX_BACKPRESSURE_APPLIED: 1;
unsigned TSV_TX_VLAN_TAGGED_FRAME: 1;
unsigned TSV_IGNORED: 4;
unsigned TSV_USER_DEFINED: 8;
};
}; // descriptor header
//Common to both Receive and Transmit
uint8_t* next_ed; // next descriptor (NPV==1);
}__attribute__((__packed__)) eth_buffer_descriptor_t; // hardware RX descriptor (linked).
For more information on this structure, refer to the "Ethernet" section in the family reference manual.
5.6.8.4.3.3 Transmit
C
Description
#include "plib_eth.h"
/***********************************************************************
//
*/
void my_ETH_Transmit(ETH_MODULE_ID id, eth_buffer_descriptor_t *pArrDcpt, uint8_t *pArrBuff,
uint8_t nArrayItems, uint16_t *pArrSize)
{
//Input Parameters:
// *pArrDcpt : pointer to an array that holds free descriptors
// *pArrBuff: pointer to an array that holds buffers to be transmitted
// *pArrSize: pointer to an array that holds the sizes of the buffers to be transmitted
// nArrayItems: number of buffers to be transmitted
//
// Before attempting to transmit, the data must be placed into a packet
// buffer (list) and the point(s) must be placed into transmit descriptor(s)
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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// Refer to the DRV_ETH or the device family reference manual for more information
extern void* VA_TO_PA(char* pBuff); // extern function that returns the physical
// address of the input virtual address parameter
uint16_t ix; // loop index
eth_buffer_descriptor_t *pEDcpt; // current Ethernet descriptor
eth_buffer_descriptor_t *tailDcpt; // last Ethernet descriptor
uint8_t *pBuff; // current data buffer to be transmitted
uint16_t *pSize; // current data buffer size
pEDcpt=pArrDcpt;
pBuff=pArrBuff;
pSize=pArrSize;
tailDcpt=0;
for(ix=0; ix< nArrayItems; ix++, pEDcpt++, pBuff++, pSize++)
{
// pass the descriptor to hw, use linked descriptors, set proper size
pEDcpt->pEDBuff = (uint8_t *)VA_TO_PA(pBuff); // set buffer
pEDcpt->w=0; // clear all the fields
pEDcpt->NPV=1; // set next pointer valid
pEDcpt->EOWN=1; // set hw ownership
pEDcpt->bCount = *pSize; // set proper size
if(tailDcpt)
{
tailDcpt->next_ed = VA_TO_PA(&pEDcpt);
}
tailDcpt=pEDcpt;
}
// at this moment pEDcpt is an extra descriptor we use to end the descriptors list
pEDcpt->w=0; // software ownership
tailDcpt->next_ed= VA_TO_PA(&pEDcpt);
pArrDcpt[0].SOP=1; // start of packet
pArrDcpt[nArrayItems-1].EOP=1; // end of packet
PLIB_ETH_TransmitPacketDescStartAddrSet(id, VA_TO_PA(pArrDcpt)); // set the transmit
address
PLIB_ETH_TransmitRequestToSendIsEnabled(id); // set the TXRTS
// the ETHC will transmit the buffers we just programmed
/* do something else in between */
while (PLIB_ETH_TxRTSIsEnabled(id))
{
//Wait until transmit is not busy
}
// check the ETHSTAT register to see the transfer result
}
5.6.8.4.3.4 Receive
#include "plib_eth.h"
/***********************************************************************
//
*/
void my_ETH_Receive(ETH_MODULE_ID id, eth_buffer_descriptor_t *pArrDcpt, uint8_t *pArrBuff,
uint8_t nArrayItems, uint16_t rxBuffSize)
{
extern void* VA_TO_PA(char* pBuff); // extern function that returns the physical
// address of the input virtual address parameter
int ix;// index
eth_buffer_descriptor_t *pEDcpt; // current Ethernet descriptor
eth_buffer_descriptor_t *tailDcpt; // last Ethernet descriptor
char* pBuff;// current data buffer to be transmitted
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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pEDcpt=pArrDcpt;
pBuff=pArrBuff;
tailDcpt=0;
//Prepare to receive
PLIB_ETH_ReceiveBufferSizeSet(id, (rxBuffSize/16));
for(ix=0; ix< nArrayItems; ix++, pEDcpt++, pBuff++)
{// pass the descriptor to hw, use linked descriptors, set proper size
pEDcpt->pEDBuff=(unsigned char*)VA_TO_PA(pBuff);// set buffer
pEDcpt->w=0;// clear all the fields
pEDcpt->NPV= 1;// set next pointer valid
pEDcpt->EOWN= 1;// set hw ownership
if(tailDcpt)
{
tailDcpt->next_ed=VA_TO_PA(&pEDcpt);
}
tailDcpt=pEDcpt;
}
// at this moment pEDcpt is an extra descriptor we use to end the descriptors list
pEDcpt->w=0;// software ownership
tailDcpt->next_ed= VA_TO_PA(&pEDcpt);
PLIB_ETH_RxPacketDescStartAddrSet(id, VA_TO_PA(pArrDcpt));
// set the address of the first RX descriptor
PLIB_ETH_ReceiveEnable(id);
// the Ethernet Controller will receive frames and place them in the receive buffers
// we just programmed
/* do something else in between */
while(PLIB_ETH_RxPacketCountGet(id)==0)
{
//Wait until something is received.
// Packets are received as set by the receive filter
}
//Receive the packet
//doSomethingWithReceivedPacket()
// After the received packet has been processed, restore EOWN to 1 and
PLIB_ETH_RxBufferCountDecrement(id);
}
5.6.8.4.4 Support for Legacy "Ethernet Controller Library"
These routines (PLIB_ETH_Legacy*) provide MPLAB Harmony support for applications that use the "Ethernet Controller Library
for Microchip PIC32MX Microcontrollers" that is installed with XC32 compilers. (See
Microchip\xc32\v1.20\docs\pic32-lib-help\hlpETH.chm for information on this legacy support.)
An additional argument, an index value from the ETH_MODULE_ID enumeration, has been added to allow these functions to
work from within the context of this MPLAB Harmony Peripheral Library.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1920
Legacy Controller Library MPLAB Harmony
EthClose
EthDescriptorGetBuffer
EthDescriptorsPoolAdd
EthDescriptorsPoolCleanUp
EthDescriptorsPoolRemove
EthEventsClr
EthEventsEnableClr
EthEventsEnableGet
EthEventsEnableSet
EthEventsEnableWrite
EthEventsGet
EthInit
EthMACGetAddress
EthMACOpen
EthMACSetAddress
EthMACSetMaxFrame
EthRxAcknowledgeBuffer
EthRxAcknowledgePacket
EthRxBuffersAppend
EthRxFiltersClr
EthRxFiltersHTSet
EthRxFiltersPMClr
EthRxFiltersPMSet
EthRxFiltersSet
EthRxFiltersWrite
EthRxGetBuffer
EthRxGetPacket
EthRxSetBufferSize
EthStatRxAlgnErrCnt
EthStatRxFcsErrCnt
EthStatRxOkCnt
EthStatRxOvflCnt
EthStatTxMColCnt
EthStatTxOkCnt
EthStatTxSColCnt
EthTxAcknowledgeBuffer
EthTxAcknowledgePacket
EthTxGetBufferStatus
EthTxGetPacketStatus
EthTxSendBuffer
EthTxSendPacket
DRV_ETHMAC_LegacyClose
DRV_ETHMAC_LegacyDescriptorGetBuffer
DRV_ETHMAC_LegacyDescriptorsPoolAdd
DRV_ETHMAC_LegacyDescriptorsPoolCleanUp
DRV_ETHMAC_LegacyDescriptorsPoolRemove
PLIB_ETH_EventsClr
PLIB_ETH_EventsEnableClr
PLIB_ETH_EventsEnableGet
PLIB_ETH_EventsEnableSet
PLIB_ETH_EventsEnableWrite
PLIB_ETH_EventsGet
DRV_ETHMAC_LegacyInit
PLIB_ETH_MACGetAddress
DRV_ETHMAC_LegacyMACOpen
PLIB_ETH_MACSetAddress
PLIB_ETH_MACSetMaxFrame
DRV_ETHMAC_LegacyRxAcknowledgeBuffer
DRV_ETHMAC_LegacyRxAcknowledgePacket
DRV_ETHMAC_LegacyRxBuffersAppend
PLIB_ETH_RxFiltersClr
PLIB_ETH_RxFiltersHTSet
PLIB_ETH_RxFiltersPMClr
PLIB_ETH_RxFiltersPMSet
PLIB_ETH_RxFiltersSet
PLIB_ETH_RxFiltersWrite
DRV_ETHMAC_LegacyRxGetBuffer
DRV_ETHMAC_LegacyRxGetPacket
PLIB_ETH_RxSetBufferSize
PLIB_ETH_StatRxAlgnErrCnt
PLIB_ETH_StatRxFcsErrCnt
PLIB_ETH_StatRxOkCnt
PLIB_ETH_StatRxOvflCnt
PLIB_ETH_StatTxMColCnt
PLIB_ETH_StatTxOkCnt
PLIB_ETH_StatTxSColCnt
DRV_ETHMAC_LegacyTxAcknowledgeBuffer
DRV_ETHMAC_LegacyTxAcknowledgePacket
DRV_ETHMAC_LegacyTxGetBufferStatus
DRV_ETHMAC_LegacyTxGetPacketStatus
DRV_ETHMAC_LegacyTxSendBuffer
DRV_ETHMAC_LegacyTxSendPacket
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Ethernet Peripheral Library Legacy Controller Library
PLIB_ETH_EventsClr
PLIB_ETH_EventsEnableClr
PLIB_ETH_EventsEnableGet
PLIB_ETH_EventsEnableSet
PLIB_ETH_EventsEnableWrite
PLIB_ETH_EventsGet
PLIB_ETH_MACGetAddress
PLIB_ETH_MACSetAddress
PLIB_ETH_MACSetMaxFrame
PLIB_ETH_RxFiltersClr
PLIB_ETH_RxFiltersHTSet
PLIB_ETH_RxFiltersPMClr
PLIB_ETH_RxFiltersPMSet
PLIB_ETH_RxFiltersSet
PLIB_ETH_RxFiltersWrite
PLIB_ETH_RxSetBufferSize
PLIB_ETH_StatRxAlgnErrCnt
PLIB_ETH_StatRxFcsErrCnt
PLIB_ETH_StatRxOkCnt
PLIB_ETH_StatRxOvflCnt
PLIB_ETH_StatTxMColCnt
PLIB_ETH_StatTxOkCnt
PLIB_ETH_StatTxSColCnt
EthEventsClr
EthEventsEnableClr
EthEventsEnableGet
EthEventsEnableSet
EthEventsEnableWrite
EthEventsGet
EthMACGetAddress
EthMACSetAddress
EthMACSetMaxFrame
EthRxFiltersClr
EthRxFiltersHTSet
EthRxFiltersPMClr
EthRxFiltersPMSet
EthRxFiltersSet
EthRxFiltersWrite
EthRxSetBufferSize
EthStatRxAlgnErrCnt
EthStatRxFcsErrCnt
EthStatRxOkCnt
EthStatRxOvflCnt
EthStatTxMColCnt
EthStatTxOkCnt
EthStatTxSColCnt
5.6.8.5 Library Interface
Data Types and Constants
Name Description
ETH_AUTOPAD_OPTION Lists the possible automatic padding configurations.
ETH_INTERRUPT_SOURCES Lists the possible values of ETH_INTERRUPT_SOURCES.
ETH_MIIM_CLK Lists the possible speed selection for the Reduced Media Independent Interface
(RMII).
ETH_PATTERN_MATCH_MODE Lists the possible pattern match values.
ETH_RECEIVE_FILTER Lists the possible values of the receive filter.
ETH_RMII_SPEED Lists the possible speed selection for the Reduced Media Independent Interface
(RMII).
Control Functions
Name Description
PLIB_ETH_MCSRxResetDisable Disables the reset EMAC Control Sub-layer/Receive domain logic.
PLIB_ETH_MCSRxResetEnable Enables the reset EMAC Control Sub-layer/Receive domain logic.
PLIB_ETH_MCSRxResetIsEnabled Gets the EMAC Control Sub-layer/Receive domain logic reset status.
PLIB_ETH_MCSTxResetDisable Disables the reset EMAC Control Sub-layer/Transmit domain logic.
PLIB_ETH_MCSTxResetEnable Enables the reset of EMAC Control Sub-layer/Transmit domain logic.
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PLIB_ETH_MCSTxResetIsEnabled Gets the EMAC Control Sub-layer/Transmit domain logic reset status.
PLIB_ETH_MIIMReadDataGet Gets EMAC MIIM management read data after a MII read cycle has
completed.
PLIB_ETH_MIIMReadStart Initiates an MII management read command.
PLIB_ETH_MIIMResetDisable Disables EMAC Reset MII Management.
PLIB_ETH_MIIMResetEnable Enables EMAC Reset Media Independent Interface (MII) Management.
PLIB_ETH_MIIMResetIsEnabled Gets the EMAC Reset MII Management enable status.
PLIB_ETH_MIIMScanIncrEnable Enables EMAC MIIM Scan Increment.
PLIB_ETH_MIIMScanIncrDisable Disables the EMAC MIIM Scan Increment.
PLIB_ETH_MIIMScanIncrIsEnabled Gets the EMAC MIIM scan increment enable status.
PLIB_ETH_MIIMScanModeDisable Disables MIIM scan mode.
PLIB_ETH_MIIMScanModeEnable Enables MIIM scan mode.
PLIB_ETH_MIIMScanModeIsEnabled Gets the MII management scan enable status.
PLIB_ETH_MIIMWriteDataSet Sets the EMAC MIIM write data before initiating an MII write cycle.
PLIB_ETH_MIIMWriteStart Initiates an MII management write command.
PLIB_ETH_MIIResetDisable Disables the EMAC Soft reset.
PLIB_ETH_MIIResetEnable Enables the EMAC MIIM Soft reset.
PLIB_ETH_MIIResetIsEnabled Gets EMAC MIIM Soft Reset enable status.
PLIB_ETH_PHYAddressGet Gets the EMAC MIIM management PHY address.
PLIB_ETH_PHYAddressSet Sets the EMAC MIIM PHY address.
PLIB_ETH_RegisterAddressGet Gets the EMAC MIIM management register address.
PLIB_ETH_RegisterAddressSet Sets EMAC MIIM register address.
PLIB_ETH_RMIIResetDisable Disables EMAC Reset RMII.
PLIB_ETH_RMIIResetEnable Enables EMAC Reset RMII.
PLIB_ETH_RMIIResetIsEnabled Gets the EMAC Reset RMII enable status.
PLIB_ETH_RxBufferCountDecrement Causes the Receive Descriptor Buffer Counter to decrement by 1.
PLIB_ETH_RxDisable Disables the Ethernet module receive logic.
PLIB_ETH_RxEnable Enables the Ethernet receive logic.
PLIB_ETH_RxFuncResetDisable Disables the EMAC reset receive funtion logic.
PLIB_ETH_RxFuncResetEnable Enables the EMAC reset receive funtion logic.
PLIB_ETH_RxFuncResetIsEnabled Gets the EMAC reset receive function status.
PLIB_ETH_RxIsEnabled Gets the Ethernet module receive enable status.
PLIB_ETH_RxPacketDescAddrGet Gets the address of the next receive descriptor.
PLIB_ETH_RxPacketDescAddrSet Sets the Ethernet module receive packet descriptor start address.
PLIB_ETH_TestPauseDisable Disables EMAC test pause.
PLIB_ETH_TestPauseEnable Enables EMAC test pause.
PLIB_ETH_TestPauseIsEnabled Gets the EMAC test pause enable status.
PLIB_ETH_TxFuncResetDisable Disables the EMAC Transmit function reset.
PLIB_ETH_TxFuncResetEnable Enables the EMAC transmit function reset.
PLIB_ETH_TxFuncResetIsEnabled Gets the EMAC Transmit function reset status.
PLIB_ETH_TxPacketDescAddrGet Gets the address of the next descriptor to be transmitted.
PLIB_ETH_TxPacketDescAddrSet Sets the Ethernet module transmit packet descriptor start address.
PLIB_ETH_TxRTSDisable Aborts an Ethernet module transmission.
PLIB_ETH_TxRTSEnable Enables the Ethernet transmit request to send.
PLIB_ETH_TxRTSIsEnabled Gets the Ethernet module transmit request to send status.
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PLIB_ETH_CRCDisable Disables EMAC CRC.
PLIB_ETH_CRCEnable Enables EMAC CRC.
PLIB_ETH_CRCIsEnabled Gets the EMAC CRC enable status.
Existence Functions
Name Description
PLIB_ETH_ExistsAlignmentErrorCount Identifies whether the AlignmentErrorCount feature exists on the
Ethernet module.
PLIB_ETH_ExistsAutoFlowControl Identifies whether the AutoFlowControl feature exists on the
Ethernet module.
PLIB_ETH_ExistsCollisionCounts Identifies whether the CollisionCounts feature exists on the
Ethernet module.
PLIB_ETH_ExistsCollisionWindow Identifies whether the CollisionWindow feature exists on the
Ethernet module.
PLIB_ETH_ExistsEnable Identifies whether the Enable feature exists on the Ethernet module.
PLIB_ETH_ExistsEthernetControllerStatus Identifies whether the EthernetControllerStatus feature exists on
the Ethernet module.
PLIB_ETH_ExistsFCSErrorCount Identifies whether the FCSErrorCount feature exists on the
Ethernet module.
PLIB_ETH_ExistsFramesTransmittedOK Identifies whether the FramesTransmittedOK feature exists on the
Ethernet module.
PLIB_ETH_ExistsFramexReceivedOK Identifies whether the FramexReceivedOK feature exists on the
Ethernet module.
PLIB_ETH_ExistsHashTable Identifies whether the HashTable feature exists on the Ethernet
module.
PLIB_ETH_ExistsInterPacketGaps Identifies whether the InterPacketGaps feature exists on the
Ethernet module.
PLIB_ETH_ExistsInterrupt Identifies whether the Interrupt feature exists on the Ethernet
module.
PLIB_ETH_ExistsMAC_Configuration Identifies whether the MAC_Configuration feature exists on the
Ethernet module.
PLIB_ETH_ExistsMAC_Resets Identifies whether the MAC_Resets feature exists on the Ethernet
module.
PLIB_ETH_ExistsMAC_Testing Identifies whether the MAC_Testing feature exists on the Ethernet
module.
PLIB_ETH_ExistsManualFlowControl Identifies whether the ManualFlowControl feature exists on the
Ethernet module.
PLIB_ETH_ExistsMaxFrameLength Identifies whether the MaxFrameLength feature exists on the
Ethernet module.
PLIB_ETH_ExistsMIIM_Config Identifies whether the MIIM_Config feature exists on the Ethernet
module.
PLIB_ETH_ExistsMIIM_Indicators Identifies whether the MIIM_Indicators feature exists on the
Ethernet module.
PLIB_ETH_ExistsMIIMAddresses Identifies whether the MIIMAddresses feature exists on the
Ethernet module.
PLIB_ETH_ExistsMIIMReadWrite Identifies whether the MIIMReadWrite feature exists on the
Ethernet module.
PLIB_ETH_ExistsMIIMScanMode Identifies whether the MIIMScanMode feature exists on the
Ethernet module.
PLIB_ETH_ExistsMIIWriteReadData Identifies whether the MIIWriteReadData feature exists on the
Ethernet module.
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PLIB_ETH_ExistsPatternMatch Identifies whether the PatternMatch feature exists on the Ethernet
module.
PLIB_ETH_ExistsPauseTimer Identifies whether the PauseTimer feature exists on the Ethernet
module.
PLIB_ETH_ExistsReceiveBufferSize Identifies whether the ReceiveBufferSize feature exists on the
Ethernet module.
PLIB_ETH_ExistsReceiveFilters Identifies whether the ReceiveFilters feature exists on the Ethernet
module.
PLIB_ETH_ExistsReceiveOverflowCount Identifies whether the ReceiveOverflowCount feature exists on the
Ethernet module.
PLIB_ETH_ExistsReceiveWmarks Identifies whether the ReceiveWmarks feature exists on the
Ethernet module.
PLIB_ETH_ExistsRetransmissionMaximum Identifies whether the RetransmissionMaximum feature exists on
the Ethernet module.
PLIB_ETH_ExistsRMII_Support Identifies whether the RMII_Support feature exists on the Ethernet
module.
PLIB_ETH_ExistsRxBufferCountDecrement Identifies whether the RxBufferCountDecrement feature exists on
the Ethernet module.
PLIB_ETH_ExistsRxEnable Identifies whether the ReceiveEnable feature exists on the Ethernet
module.
PLIB_ETH_ExistsRxPacketDescriptorAddress Identifies whether the RxPacketDescriptorAddress feature exists on
the Ethernet module.
PLIB_ETH_ExistsStationAddress Identifies whether the StationAddress feature exists on the Ethernet
module.
PLIB_ETH_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the Ethernet
module.
PLIB_ETH_ExistsTransmitRTS Identifies whether the TransmitRTS feature exists on the Ethernet
module.
PLIB_ETH_ExistsTxPacketDescriptorAddress Identifies whether the TxPacketDescriptorAddress feature exists on
the Ethernet module.
Filtering Functions
Name Description
PLIB_ETH_HashTableGet Gets the value of the Hash table.
PLIB_ETH_HashTableSet Sets the Ethernet module Hash table with the new value.
PLIB_ETH_PassAllDisable Disables the EMAC PassAll.
PLIB_ETH_PassAllEnable Enables the EMAC PassAll.
PLIB_ETH_PassAllIsEnabled Gets the EMAC PassAll enable status.
PLIB_ETH_PatternMatchChecksumGet Gets the value of the pattern match checksum register.
PLIB_ETH_PatternMatchChecksumSet Sets the Ethernet module pattern match checksum register with the new
value.
PLIB_ETH_PatternMatchGet Gets the value of the selected pattern match mask register.
PLIB_ETH_PatternMatchModeGet Gets the value of the selected pattern match mask register.
PLIB_ETH_PatternMatchModeSet Sets the Ethernet module pattern match mode.
PLIB_ETH_PatternMatchOffsetGet Gets the value of the patter match offset register.
PLIB_ETH_PatternMatchOffsetSet Sets the Ethernet module patter match offset register with the new value.
PLIB_ETH_PatternMatchSet Sets the Ethernet module pattern match mask register with the new value.
PLIB_ETH_PurePreambleDisable Disables EMAC pure preamble enforcement.
PLIB_ETH_PurePreambleEnable Enables EMAC pure preamble enforcement.
PLIB_ETH_PurePreambleIsEnabled Gets EMAC pure preamble enforcement enable status.
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PLIB_ETH_ReceiveFilterDisable Disables the specified receive filter.
PLIB_ETH_ReceiveFilterEnable Enables the specified receive filter.
PLIB_ETH_ReceiveFilterIsEnable Disables the specified receive filter.
PLIB_ETH_StationAddressGet Gets the selected EMAC station address.
PLIB_ETH_StationAddressSet Sets the selected EMAC Station Address.
Flow Control Functions
Name Description
PLIB_ETH_AutoFlowControlDisable Disables the Ethernet module Automatic Flow Control logic.
PLIB_ETH_AutoFlowControlEnable Enables the Ethernet Automatic Flow Control logic.
PLIB_ETH_AutoFlowControlIsEnabled Gets the Ethernet module Automatic Flow Control status.
PLIB_ETH_BackPresNoBackoffDisable Disables EMAC back pressure/no backo-ff.
PLIB_ETH_BackPresNoBackoffEnable Enables EMAC back pressure/no back-off.
PLIB_ETH_BackPresNoBackoffIsEnabled Gets the EMAC back pressure/no back-off enable status.
PLIB_ETH_ManualFlowControlDisable Disable Ethernet module Manual Flow Control logic.
PLIB_ETH_ManualFlowControlEnable Enables the Ethernet Manual Flow Control logic.
PLIB_ETH_ManualFlowControlIsEnabled Gets the Ethernet module Manual Flow Control enable status.
PLIB_ETH_NoBackoffDisable Disables EMAC no back-offs.
PLIB_ETH_NoBackoffEnable Enables EMAC no backoff.
PLIB_ETH_NoBackoffIsEnabled Gets the EMAC no back-off enable status.
PLIB_ETH_RxEmptyWmarkGet Gets the Ethernet module receive empty watermark.
PLIB_ETH_RxEmptyWmarkSet Sets the Ethernet module receive empty water mark.
PLIB_ETH_RxFullWmarkGet Gets the Ethernet module receive full watermark.
PLIB_ETH_RxFullWmarkSet Sets the Ethernet module receive full water mark.
PLIB_ETH_RxPauseDisable Disables the EMAC receive flow control.
PLIB_ETH_RxPauseEnable Enables the EMAC receive flow control.
PLIB_ETH_RxPauseIsEnabled Gets the EMAC receive flow pause enable status.
PLIB_ETH_ShortcutQuantaDisable Disables EMAC shortcut pause quanta.
PLIB_ETH_ShortcutQuantaEnable Enables EMAC shortcut pause quanta.
PLIB_ETH_ShortcutQuantaIsEnabled Gets EMAC shortcut pause quanta enable status.
PLIB_ETH_SimResetDisable Disables the EMAC simulation reset.
PLIB_ETH_SimResetEnable Enables the EMAC simulation reset.
PLIB_ETH_SimResetIsEnabled Gets the EMAC simulation reset status.
PLIB_ETH_TestBackPressDisable Disables EMAC Test backpressure.
PLIB_ETH_TestBackPressEnable Enables EMAC Test backpressure.
PLIB_ETH_TestBackPressIsEnabled Gets the EMAC test backpressure enable status.
PLIB_ETH_TxPauseDisable Disables the transmission of Pause frames.
PLIB_ETH_TxPauseEnable Enables the the tansmission Pause frames.
PLIB_ETH_TxPauseIsEnabled Gets the Ethernet module enable status.
Initialization Functions
Name Description
PLIB_ETH_AutoDetectPadClear Clears the EMAC Auto-Pad option.
PLIB_ETH_AutoDetectPadGet Gets the current EMAC Auto-Pad setting.
PLIB_ETH_AutoDetectPadSet Sets the EMAC Auto-Pad option.
PLIB_ETH_BackToBackIPGGet Gets the EMAC back-to-back interpacket gap.
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PLIB_ETH_BackToBackIPGSet Sets the EMAC back-to-back interpacket gap.
PLIB_ETH_CollisionWindowGet Gets the EMAC collision window.
PLIB_ETH_CollisionWindowSet Sets the EMAC collision window.
PLIB_ETH_DelayedCRCDisable Disables EMAC delayed CRC.
PLIB_ETH_DelayedCRCEnable Enables EMAC delayed CRC.
PLIB_ETH_DelayedCRCIsEnabled Gets the EMAC delayed CRC enable status.
PLIB_ETH_Disable Disables the Ethernet module.
PLIB_ETH_Enable Enables the Ethernet module.
PLIB_ETH_ExcessDeferDisable Disables EMAC excess defer.
PLIB_ETH_ExcessDeferEnable Enables EMAC excess defer.
PLIB_ETH_ExcessDeferIsEnabled Gets the EMAC excess defer enable status.
PLIB_ETH_FrameLengthCheckDisable Disables the EMAC frame length check.
PLIB_ETH_FrameLengthCheckEnable Enables the EMAC frame length check.
PLIB_ETH_FrameLengthCheckIsEnabled Gets the EMAC frame length check status.
PLIB_ETH_FullDuplexDisable Disables the EMAC full duplex operatio.
PLIB_ETH_FullDuplexEnable Enables the EMAC full deuplex operation.
PLIB_ETH_FullDuplexIsEnabled Gets the EMAC full duplex enable status.
PLIB_ETH_HugeFrameDisable Disables the EMAC from receiving huge frames.
PLIB_ETH_HugeFrameEnable Enables the EMAC to receive huge frames.
PLIB_ETH_HugeFrameIsEnabled Gets the EMAC huge frame enable status.
PLIB_ETH_IsEnabled Gets the Ethernet module enable status.
PLIB_ETH_LongPreambleDisable Disables EMAC long preamble enforcement.
PLIB_ETH_LongPreambleEnable Enables EMAC long preamble enforcement.
PLIB_ETH_LongPreambleIsEnabled Gets the EMAC long preamble enforcement enable status.
PLIB_ETH_LoopbackDisable Disables the EMAC loopback logic.
PLIB_ETH_LoopbackEnable Enables the EMAC loopback logic.
PLIB_ETH_LoopbackIsEnabled Gets the EMAC Loopback interface enable status.
PLIB_ETH_MaxFrameLengthGet Gets the EMAC maximum frame length.
PLIB_ETH_MaxFrameLengthSet Sets the EMAC maximum frame length.
PLIB_ETH_MIIMClockGet Gets the current EMAC MIIM clock selection.
PLIB_ETH_MIIMClockSet Sets the EMAC MIM clock selection.
PLIB_ETH_MIIMNoPreDisable Disables EMAC No Preamble (allows preamble).
PLIB_ETH_MIIMNoPreEnable Enables EMAC MIIM No Preamble (suppresses preamble).
PLIB_ETH_MIIMNoPreIsEnabled Gets the EMAC MIIM No Preamble enable status.
PLIB_ETH_NonBackToBackIPG1Get Gets the EMAC non-back-to-back interpacket gap register 1.
PLIB_ETH_NonBackToBackIPG1Set Sets the EMAC non-back-to-back interpacket gap register 1.
PLIB_ETH_NonBackToBackIPG2Get Gets the EMAC non-back-to-back interpacket gap register 2.
PLIB_ETH_NonBackToBackIPG2Set Sets the EMAC non-back-to-back interpacket gap register 2.
PLIB_ETH_PauseTimerGet Gets the Pause Timer value used for flow control.
PLIB_ETH_PauseTimerSet Sets the Pause Timer value used for flow control.
PLIB_ETH_ReceiveBufferSizeGet Gets the Ethernet module receive buffer size.
PLIB_ETH_ReceiveBufferSizeSet Sets the Ethernet module receive buffer size.
PLIB_ETH_ReceiveDisable Disables the EMAC from receiving frames.
PLIB_ETH_ReceiveEnable Enables the EMAC to receive the frames.
PLIB_ETH_ReceiveIsEnabled Gets the Ethernet EMAC receive enable status.
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PLIB_ETH_ReTxMaxGet Gets the EMAC maximum retransmissions.
PLIB_ETH_ReTxMaxSet Sets the EMAC maximum retransmissions.
PLIB_ETH_RMIISpeedGet Gets the current EMAC RMII speed.
PLIB_ETH_RMIISpeedSet Sets EMAC RMII Speed.
PLIB_ETH_StopInIdleDisable Ethernet module operation will continue when the device enters Idle
mode.
PLIB_ETH_StopInIdleEnable Ethernet module operation will stop when the device enters Idle mode.
PLIB_ETH_StopInIdleIsEnabled Gets the Ethernet module Stop in Idle mode enable status.
Interrupt Functions
Name Description
PLIB_ETH_InterruptClear Clears the Ethernet module interrupt source status as a group, using a mask.
PLIB_ETH_InterruptSet Sets the Ethernet module interrupt source status as a group, using a mask.
PLIB_ETH_InterruptsGet Gets the Ethernet module Interrupt Flag register as a group.
PLIB_ETH_InterruptSourceDisable Clears the Ethernet module Interrupt Enable register as a group, using a
mask.
PLIB_ETH_InterruptSourceEnable Sets the Ethernet module Interrupt Enable register in a group, using a mask.
PLIB_ETH_InterruptSourceIsEnabled Gets the Ethernet module Interrupt Enable register singularly or as a group.
PLIB_ETH_InterruptSourcesGet Returns the entire interrupt enable register.
PLIB_ETH_InterruptStatusGet Gets the Ethernet module Interrupt Flag register as a group, using a mask.
Statistics Functions
Name Description
PLIB_ETH_AlignErrorCountClear Sets the count of Ethernet alignment errors to zero.
PLIB_ETH_AlignErrorCountGet Gets the count of Ethernet alignment errors.
PLIB_ETH_FCSErrorCountClear Sets the value of the Ethernet frame check sequence error to zero.
PLIB_ETH_FCSErrorCountGet Gets the count of the frame check sequence error.
PLIB_ETH_FramesRxdOkCountClear Sets the value of the Ethernet received frames 'OK' count to zero.
PLIB_ETH_FramesRxdOkCountGet Gets the count of the frames frames received successfully.
PLIB_ETH_FramesTxdOkCountClear Sets the count of Ethernet Control frames transmitted to zero.
PLIB_ETH_FramesTxdOkCountGet Gets the count of Ethernet Control Frames transmitted successfully.
PLIB_ETH_MultipleCollisionCountClear Sets the value of the Ethernet multiple collision frame count to zero.
PLIB_ETH_MultipleCollisionCountGet Gets the count of the frames transmitted successfully after there was
more than one collision.
PLIB_ETH_RxOverflowCountClear Sets the value of the Ethernet receive overflow count to zero.
PLIB_ETH_RxOverflowCountGet Gets the count of the dropped Ethernet receive frames.
PLIB_ETH_RxPacketCountGet Gets the value of the receive packet buffer count.
PLIB_ETH_SingleCollisionCountClear Sets the value of the Ethernet single collision frame count to zero.
PLIB_ETH_SingleCollisionCountGet Gets the count of the frames transmitted successfully on a second attempt.
Status Functions
Name Description
PLIB_ETH_DataNotValid Gets the MII management read data not valid status.
PLIB_ETH_EthernetIsBusy Gets the status value of the Ethernet logic busy.
PLIB_ETH_LinkHasFailed Gets the MII management link fail status.
PLIB_ETH_MIIMIsBusy Gets the MII management busy status.
PLIB_ETH_MIIMIsScanning Gets the MII Management scanning status.
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PLIB_ETH_ReceiveIsBusy Gets the the Ethernet receive logic busy status.
PLIB_ETH_TransmitIsBusy Gets the status value of the Ethernet transmit logic busy status
Description
This section describes the functions, data types, and constants provided in the Ethernet Peripheral Library. Refer to each section
for detailed descriptions.
• Initialization Functions
• Status Functions
• Control Functions
• Filtering Functions
• Flow Control Functions
• Statistics Functions
• Interrupt Functions
5.6.8.5.1 Initialization Functions
5.6.8.5.1.1 PLIB_ETH_AutoDetectPadClear Function
C
void PLIB_ETH_AutoDetectPadClear(
ETH_MODULE_ID index,
ETH_AUTOPAD_OPTION option
);
Description
This function sets the EMAC Auto-Pad option. If any auto-pad option other than ETH_AUTOPAD_DISABLED_CHECK_CRC is
selected, the CRC must be enabled by PLIB_ETH_CRCEnable.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_AutoDetectPadClear(MY_ETH_INSTANCE, PAD_OPTION);
5.6.8.5.1.2 PLIB_ETH_AutoDetectPadGet Function
C
ETH_AUTOPAD_OPTION PLIB_ETH_AutoDetectPadGet(
ETH_MODULE_ID index
);
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Description
This function gets the current EMAC Auto-Pad setting.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
ETH_AUTOPAD_OPTION
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
autoPadOption = PLIB_ETH_AutoDetectPadGet(MY_ETH_INSTANCE);
5.6.8.5.1.3 PLIB_ETH_AutoDetectPadSet Function
C
void PLIB_ETH_AutoDetectPadSet(
ETH_MODULE_ID index,
ETH_AUTOPAD_OPTION option
);
Description
This function sets the EMAC Auto-Pad option. If any auto-pad option other than ETH_AUTOPAD_DISABLED_CHECK_CRC is
selected, the CRC must be enabled by PLIB_ETH_CRCEnable.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_AutoDetectPadSet(MY_ETH_INSTANCE, PAD_OPTION);
5.6.8.5.1.4 PLIB_ETH_BackToBackIPGGet Function
C
uint8_t PLIB_ETH_BackToBackIPGGet(
ETH_MODULE_ID index
);
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Description
This function gets the EMAC back-to-back interpacket gap.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
backToBackIPGValue - Back-to-back inter-packet gap (7-bits)
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_BackToBackIPGGet(MY_ETH_INSTANCE);
5.6.8.5.1.5 PLIB_ETH_BackToBackIPGSet Function
C
void PLIB_ETH_BackToBackIPGSet(
ETH_MODULE_ID index,
uint8_t backToBackIPGValue
);
Description
This function sets the EMAC back-to-back interpacket gap.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
backToBackIPGValue Back-to-back inter-packet gap
Returns
None.
Remarks
In Full-Duplex mode, the register value should be the desired period in nibble times minus 3. In Full-Duplex, the recommended
setting is 0x15.
In Half-Duplex mode, the register value should be the desired period in nibble times minus 6. In Half-Duplex, the recommended
setting is 0x12.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_BackToBackIPGSet(MY_ETH_INSTANCE, backToBackIPGValue);
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5.6.8.5.1.6 PLIB_ETH_CollisionWindowGet Function
C
uint8_t PLIB_ETH_CollisionWindowGet(
ETH_MODULE_ID index
);
Description
This function gets the EMAC collision window.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
collisionWindowValue - A uint8_t (6-bit) value.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_CollisionWindowGet(MY_ETH_INSTANCE);
5.6.8.5.1.7 PLIB_ETH_CollisionWindowSet Function
C
void PLIB_ETH_CollisionWindowSet(
ETH_MODULE_ID index,
uint8_t collisionWindowValue
);
Description
This function sets the EMAC collision window.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
collisionWindowValue Collision window
Returns
None.
Remarks
This is a programmable field representing the slot time or collision window during which collisions occur in properly configured
networks. Since the collision window starts at the beginning of transmission, the preamble and SFD is included. Its default of
0x37 (55d) corresponds to the count of frame bytes at the end of the window.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
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Example
PLIB_ETH_CollisionWindowSet(MY_ETH_INSTANCE, collisionWindowValue);
5.6.8.5.1.8 PLIB_ETH_DelayedCRCDisable Function
C
void PLIB_ETH_DelayedCRCDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC delayed CRC. No proprietary header exists.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_DelayedCRCDisable(MY_ETH_INSTANCE);
5.6.8.5.1.9 PLIB_ETH_DelayedCRCEnable Function
C
void PLIB_ETH_DelayedCRCEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC delayed CRC. A proprietary packet header exists. Four bytes of the packet header are ignored by
the CRC function.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_DelayedCRCEnable(MY_ETH_INSTANCE);
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5.6.8.5.1.10 PLIB_ETH_DelayedCRCIsEnabled Function
C
bool PLIB_ETH_DelayedCRCIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the EMAC delayed CRC enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - A proprietary header exists. Four bytes of packet header are ignored by the CRC function.
• false - No proprietary header
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_DelayedCRCIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.1.11 PLIB_ETH_Disable Function
C
void PLIB_ETH_Disable(
ETH_MODULE_ID index
);
Description
This function disables the Ethernet module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_Disable(MY_ETH_INSTANCE);
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5.6.8.5.1.12 PLIB_ETH_Enable Function
C
void PLIB_ETH_Enable(
ETH_MODULE_ID index
);
Description
This function enables the Ethernet module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_Enable(MY_ETH_INSTANCE);
5.6.8.5.1.13 PLIB_ETH_ExcessDeferDisable Function
C
void PLIB_ETH_ExcessDeferDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC excess defer. The EMAC will abort when the excessive deferral limit is reached.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ExcessDeferDisable(MY_ETH_INSTANCE);
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5.6.8.5.1.14 PLIB_ETH_ExcessDeferEnable Function
C
void PLIB_ETH_ExcessDeferEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC excess defer. The EMAC will defer to the carrier indefinitely.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ExcessDeferEnable(MY_ETH_INSTANCE);
5.6.8.5.1.15 PLIB_ETH_ExcessDeferIsEnabled Function
C
bool PLIB_ETH_ExcessDeferIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC excess defer enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC will defer to carrier indefinitely as per the Standard
• false - The EMAC will abort when the excessive deferral limit is reached
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_ExcessDeferIsEnabled(MY_ETH_INSTANCE);
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5.6.8.5.1.16 PLIB_ETH_FrameLengthCheckDisable Function
C
void PLIB_ETH_FrameLengthCheckDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC frame length check.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_FrameLengthCheckDisable(MY_ETH_INSTANCE);
5.6.8.5.1.17 PLIB_ETH_FrameLengthCheckEnable Function
C
void PLIB_ETH_FrameLengthCheckEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC frame length check. Both transmit and receive frame lengths are compared to the Length/Type
field. If the Length/Type field represents a length, the check is performed. Mismatches are reported on the transmit/receive
statistics vector.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_FrameLengthCheckEnable(MY_ETH_INSTANCE);
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5.6.8.5.1.18 PLIB_ETH_FrameLengthCheckIsEnabled Function
C
bool PLIB_ETH_FrameLengthCheckIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the EMAC frame length check status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Both transmit and receive frame lengths are compared to the Length/Type field. If the Length/Type field represents a
length then the check is performed. Mismatches are reported on the transmit/receive statistics vector.
• false - Length/Type field check is not performed
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_FrameLengthCheckIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.1.19 PLIB_ETH_FullDuplexDisable Function
C
void PLIB_ETH_FullDuplexDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC full-duplex operation, which results in the EMAC operating in half-duplex.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_FullDuplexDisable(MY_ETH_INSTANCE);
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5.6.8.5.1.20 PLIB_ETH_FullDuplexEnable Function
C
void PLIB_ETH_FullDuplexEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC full duplex operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_FullDuplexEnable(MY_ETH_INSTANCE);
5.6.8.5.1.21 PLIB_ETH_FullDuplexIsEnabled Function
C
bool PLIB_ETH_FullDuplexIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the EMAC full duplex enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC operates in Full-Duplex mode
• false - The EMAC operates in Half-Duplex mode
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_FullDuplexIsEnabled(MY_ETH_INSTANCE);
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5.6.8.5.1.22 PLIB_ETH_HugeFrameDisable Function
C
void PLIB_ETH_HugeFrameDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC from receiving huge frames.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_HugeFrameDisable(MY_ETH_INSTANCE);
5.6.8.5.1.23 PLIB_ETH_HugeFrameEnable Function
C
void PLIB_ETH_HugeFrameEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC receiving the frames of any length.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_HugeFrameEnable(MY_ETH_INSTANCE);
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5.6.8.5.1.24 PLIB_ETH_HugeFrameIsEnabled Function
C
bool PLIB_ETH_HugeFrameIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the EMAC huge frame enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Frames of any length are transmitted and received
• false - Huge frames are not allowed for receive or transmit
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_HugeFrameIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.1.25 PLIB_ETH_IsEnabled Function
C
bool PLIB_ETH_IsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the Ethernet module enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Ethernet module is enabled
• false - Ethernet module is disabled
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_IsEnabled(MY_ETH_INSTANCE);
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5.6.8.5.1.26 PLIB_ETH_LongPreambleDisable Function
C
void PLIB_ETH_LongPreambleDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC long preamble enforcement. The EMAC allows any length preamble.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_LongPreambleDisable(MY_ETH_INSTANCE);
5.6.8.5.1.27 PLIB_ETH_LongPreambleEnable Function
C
void PLIB_ETH_LongPreambleEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC long preamble enforcement. The EMAC only allows receive packets which contain preamble fields
less than 12 bytes in length.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_LongPreambleEnable(MY_ETH_INSTANCE);
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5.6.8.5.1.28 PLIB_ETH_LongPreambleIsEnabled Function
C
bool PLIB_ETH_LongPreambleIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC long preamble enforcement enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC only allows receive packets, which contain preamble fields less than 12 bytes in length
• false - The EMAC allows any length preamble
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_LongPreambleIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.1.29 PLIB_ETH_LoopbackDisable Function
C
void PLIB_ETH_LoopbackDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC loopback. EMAC resumes normal operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_LoopbackDisable(MY_ETH_INSTANCE);
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5.6.8.5.1.30 PLIB_ETH_LoopbackEnable Function
C
void PLIB_ETH_LoopbackEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC loopback logic. The EMAC transmit interface is looped back to the EMAC receive interface.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_LoopbackEnable(MY_ETH_INSTANCE);
5.6.8.5.1.31 PLIB_ETH_LoopbackIsEnabled Function
C
bool PLIB_ETH_LoopbackIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC Loopback interface enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - EMAC transmit interface is looped back to the EMAC receive interface
• false - EMAC normal operation
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_LoopbackIsEnabled(MY_ETH_INSTANCE);
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5.6.8.5.1.32 PLIB_ETH_MaxFrameLengthGet Function
C
uint16_t PLIB_ETH_MaxFrameLengthGet(
ETH_MODULE_ID index
);
Description
This function gets the EMAC maximum frame length.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
MaxFrameLength - Maximum frame length
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_MaxFrameLengthGet(MY_ETH_INSTANCE);
5.6.8.5.1.33 PLIB_ETH_MaxFrameLengthSet Function
C
void PLIB_ETH_MaxFrameLengthSet(
ETH_MODULE_ID index,
uint16_t MaxFrameLength
);
Description
This function sets the EMAC maximum frame length.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
MaxFrameLength Maximum frame length
Returns
None.
Remarks
This field resets to 0x05EE, which represents a maximum receive frame of 1518 bytes. An untagged maximum size Ethernet
frame is 1518 bytes. A tagged frame adds four octets for a total of 1522 bytes. If a shorter/longer maximum length restriction is
desired, program this 16-bit field.
If a proprietary header is allowed, this field should be adjusted accordingly. For example, if 4-byte headers are prepended to
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frames, MACMAXF could be set to 1527 bytes. This would allow the maximum VLAN tagged frame plus the 4-byte header.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MaxFrameLengthSet(MY_ETH_INSTANCE, MaxFrameLength);
5.6.8.5.1.34 PLIB_ETH_MIIMClockGet Function
C
ETH_MIIM_CLK PLIB_ETH_MIIMClockGet(
ETH_MODULE_ID index
);
Description
This function returns the current EMAC MIIM clock selection.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
MIIMClock - of type PLIB_ETH_MIIM_CLK
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
clkstat = PLIB_ETH_MIIMClockGet(MY_ETH_INSTANCE);
5.6.8.5.1.35 PLIB_ETH_MIIMClockSet Function
C
void PLIB_ETH_MIIMClockSet(
ETH_MODULE_ID index,
ETH_MIIM_CLK MIIMClock
);
Description
This function sets the EMAC MIIM clock selection.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
MIIMClock of type ETH_MIIM_CLK - the system clock divisor for MII
Returns
None.
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Remarks
This field is used by the clock divide logic in creating the MII Management Clock (MDC), which the IEEE 802.3 Specification
defines to be no faster than 2.5 MHz. Some PHYs support clock rates up to 12.5 MHz.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMClockSet(MY_ETH_INSTANCE, MIIMClock);
5.6.8.5.1.36 PLIB_ETH_MIIMNoPreDisable Function
C
void PLIB_ETH_MIIMNoPreDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC No preamble (allows preamble). Normal read/write cycles are performed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMNoPreDisable(MY_ETH_INSTANCE);
5.6.8.5.1.37 PLIB_ETH_MIIMNoPreEnable Function
C
void PLIB_ETH_MIIMNoPreEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC MIIM No Preamble (suppresses preamble). The MII Management will perform read/write cycles
without the 32-bit preamble field. Some PHYs support suppressed preamble.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
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Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMNoPreEnable(MY_ETH_INSTANCE);
5.6.8.5.1.38 PLIB_ETH_MIIMNoPreIsEnabled Function
C
bool PLIB_ETH_MIIMNoPreIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC MIIM No Preamble enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MII Management will perform read/write cycles without the 32-bit preamble field. Some PHYs support suppressed
preamble.
• false - Normal read/write cycles are performed
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_MIIMNoPreIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.1.39 PLIB_ETH_NonBackToBackIPG1Get Function
C
uint8_t PLIB_ETH_NonBackToBackIPG1Get(
ETH_MODULE_ID index
);
Description
This function gets the EMAC non-back-to-back interpacket gap register 1.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
nonBackToBackIPGValue - Non-back-to-back inter-packet gap (7-bits)
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Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_NonBackToBackIPG1Get(MY_ETH_INSTANCE);
5.6.8.5.1.40 PLIB_ETH_NonBackToBackIPG1Set Function
C
void PLIB_ETH_NonBackToBackIPG1Set(
ETH_MODULE_ID index,
uint8_t nonBackToBackIPGValue
);
Description
This function sets the EMAC non-back-to-back interpacket gap register 1. A value of 0x0C is recommended.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
nonBackToBackIPGValue Non-back-to-back inter-packet gap
Returns
None.
Remarks
This is a programmable field representing the optional carrierSense window referenced in the IEEE 802.3 Specification. If a
carrier is detected during the timing of IPGR1, the MAC defers to the carrier. If, however, the carrier comes after IPGR1, the
MAC continues timing IPGR2 and transmits, knowingly causing a collision, thereby ensuring fair access to the medium. Its range
of values is 0x0 to IPGR2. Its recommended value is 0xC (12d).
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_NonBackToBackIPG1Set(MY_ETH_INSTANCE, nonBackToBackIPGValue);
5.6.8.5.1.41 PLIB_ETH_NonBackToBackIPG2Get Function
C
uint8_t PLIB_ETH_NonBackToBackIPG2Get(
ETH_MODULE_ID index
);
Description
This function gets the EMAC non-back-to-back interpacket gap register 2.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
nonBackToBackIPGValue - Non-back-to-back inter-packet gap (7-bits)
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_NonBackToBackIPG2Get(MY_ETH_INSTANCE);
5.6.8.5.1.42 PLIB_ETH_NonBackToBackIPG2Set Function
C
void PLIB_ETH_NonBackToBackIPG2Set(
ETH_MODULE_ID index,
uint8_t nonBackToBackIPGValue
);
Description
This function sets the EMAC non-back-to-back interpacket gap register 2. A value of 0x12 is recommended.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
nonBackToBackIPGValue Non-back-to-back inter-packet gap
Returns
None.
Remarks
This is a programmable field representing the non-back-to-back Inter-Packet-Gap. Its recommended value is 0x12 (18d), which
represents the minimum IPG of 0.96 us (in 100 Mbps) or 9.6 us (in 10 Mbps).
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_NonBackToBackIPG2Set(MY_ETH_INSTANCE, nonBackToBackIPGValue);
5.6.8.5.1.43 PLIB_ETH_PauseTimerGet Function
C
uint16_t PLIB_ETH_PauseTimerGet(
ETH_MODULE_ID index
);
Description
This function gets the Pause Timer value used for flow control.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
PauseTimerValue - Pause Timer Value
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PauseTimerValue = PLIB_ETH_PauseTimerGet(MY_ETH_INSTANCE);
5.6.8.5.1.44 PLIB_ETH_PauseTimerSet Function
C
void PLIB_ETH_PauseTimerSet(
ETH_MODULE_ID index,
uint16_t PauseTimerValue
);
Description
This function sets the Pause Timer value used for flow control.
Preconditions
Write to the Pause Timer register before enabling the receiver. Call this function before calling PLIB_ETH_ReceiveEnable()
Parameters
Parameters Description
index Identifier for the device instance
PauseTimerValue used for Flow Control
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_PauseTimerSet(MY_ETH_INSTANCE, PauseTimerValue);
5.6.8.5.1.45 PLIB_ETH_ReceiveBufferSizeGet Function
C
uint8_t PLIB_ETH_ReceiveBufferSizeGet(
ETH_MODULE_ID index
);
Description
This function gets the Ethernet receive buffer size. The buffer size is set from 16 bytes up to 2032 bytes in increments of 16
bytes each.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
ReceiveBufferSize - receive buffer size divided by 16
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
size = PLIB_ETH_ReceiveBufferSizeGet(MY_ETH_INSTANCE);
5.6.8.5.1.46 PLIB_ETH_ReceiveBufferSizeSet Function
C
void PLIB_ETH_ReceiveBufferSizeSet(
ETH_MODULE_ID index,
uint8_t ReceiveBufferSize
);
Description
This function sets the Ethernet receive buffer size. The buffer size is set from 16 bytes up to 2032 bytes in increments of 16
bytes each.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
ReceiveBufferSize In units of 16 bytes, must be a value of 0x01 to 0x7F, 0x00 is invalid
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ReceiveBufferSizeSet(MY_ETH_INSTANCE, ReceiveBufferSize/16 );
5.6.8.5.1.47 PLIB_ETH_ReceiveDisable Function
C
void PLIB_ETH_ReceiveDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC from receiving frames.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ReceiveDisable(MY_ETH_INSTANCE);
5.6.8.5.1.48 PLIB_ETH_ReceiveEnable Function
C
void PLIB_ETH_ReceiveEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC to receive the frames.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ReceiveEnable(MY_ETH_INSTANCE);
5.6.8.5.1.49 PLIB_ETH_ReceiveIsEnabled Function
C
bool PLIB_ETH_ReceiveIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the Ethernet EMAC receive enable status.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Enable the EMAC to receive frames
• false - Disable the EMAC to receive frames
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_ReceiveIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.1.50 PLIB_ETH_ReTxMaxGet Function
C
uint8_t PLIB_ETH_ReTxMaxGet(
ETH_MODULE_ID index
);
Description
This function gets the EMAC maximum retransmissions.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
retransmitMax - Maximum number of retransmissions
Remarks
The maximum number of attempts is limited to 0x0F.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_ReTxMaxGet(MY_ETH_INSTANCE);
5.6.8.5.1.51 PLIB_ETH_ReTxMaxSet Function
C
void PLIB_ETH_ReTxMaxSet(
ETH_MODULE_ID index,
uint16_t retransmitMax
);
Description
This function sets the EMAC maximum retransmissions.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
retransmitMax Maximum number of retransmissions
Returns
None.
Remarks
This is a programmable field specifying the number of retransmission attempts following a collision before aborting the packet
due to excessive collisions. The IEEE 802.3 Specification standard specifies the maximum number of attempts (attemptLimit) to
be 0xF (15d). Its default is 000.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ReTxMaxSet(retransmitMax);
5.6.8.5.1.52 PLIB_ETH_RMIISpeedGet Function
C
ETH_RMII_SPEED PLIB_ETH_RMIISpeedGet(
ETH_MODULE_ID index
);
Description
This function gets the current EMAC RMII speed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
RMII_100Mbps - RMII running at 100Mbps RMII_10Mbps - RMII running at 10Mbps
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RMIISpeedGet(MY_ETH_INSTANCE);
5.6.8.5.1.53 PLIB_ETH_RMIISpeedSet Function
C
void PLIB_ETH_RMIISpeedSet(
ETH_MODULE_ID index,
ETH_RMII_SPEED RMIISpeed
);
Description
This function sets EMAC RMII speed. RMII speed can be either RMII_100Mbps or RMII_10Mbps.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
RMIISpeed RMII_100Mbps or RMII_10Mbps of type ETH_RMII_SPEED
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RMIISpeedSet(MY_ETH_INSTANCE, ETH_RMII_SPEED RMIISpeed);
5.6.8.5.1.54 PLIB_ETH_StopInIdleDisable Function
C
void PLIB_ETH_StopInIdleDisable(
ETH_MODULE_ID index
);
Description
This function directs the Ethernet module to continue operation when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_StopInIdleDisable(MY_ETH_INSTANCE);
5.6.8.5.1.55 PLIB_ETH_StopInIdleEnable Function
C
void PLIB_ETH_StopInIdleEnable(
ETH_MODULE_ID index
);
Description
This function directs the Ethernet module to stop operation when the device enters Idle mode.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_StopInIdleEnable(MY_ETH_INSTANCE);
5.6.8.5.1.56 PLIB_ETH_StopInIdleIsEnabled Function
C
bool PLIB_ETH_StopInIdleIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the Ethernet module Stop in Idle mode enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Ethernet module transfers stop during Idle mode
• false - Ethernet module transfers continue to run during Idle mode
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_StopInIdleIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2 Control Functions
5.6.8.5.2.1 PLIB_ETH_MCSRxResetDisable Function
C
void PLIB_ETH_MCSRxResetDisable(
ETH_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Description
This function disables the reset EMAC Control Sub-layer/Receive domain logic. The MCS/Receive domain logic is released from
reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MCSRxResetDisable(MY_ETH_INSTANCE);
5.6.8.5.2.2 PLIB_ETH_MCSRxResetEnable Function
C
void PLIB_ETH_MCSRxResetEnable(
ETH_MODULE_ID index
);
Description
This function enables the reset EMAC Control Sub-layer/Receive domain logic. The MCS/Receive domain logic is held in reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MCSRxResetEnable(MY_ETH_INSTANCE);
5.6.8.5.2.3 PLIB_ETH_MCSRxResetIsEnabled Function
C
bool PLIB_ETH_MCSRxResetIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC Control Sub-layer/Receive domain logic reset status.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - EMAC Control Sub-layer/Receive domain logic is in reset
• false - EMAC Control Sub-layer/Receive domain logic is not in reset
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_MCSRxResetIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2.4 PLIB_ETH_MCSTxResetDisable Function
C
void PLIB_ETH_MCSTxResetDisable(
ETH_MODULE_ID index
);
Description
This function disables the reset EMAC Control Sub-layer/Transmit domain logic. The MCS/Transmit domain logic is released
from reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MCSTxResetDisable(MY_ETH_INSTANCE);
5.6.8.5.2.5 PLIB_ETH_MCSTxResetEnable Function
C
void PLIB_ETH_MCSTxResetEnable(
ETH_MODULE_ID index
);
Description
This function resets the EMAC Control Sub-layer/Transmit domain logic. The MCS/Transmit domain logic is held in reset.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1959
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MCSTxResetEnable(MY_ETH_INSTANCE);
5.6.8.5.2.6 PLIB_ETH_MCSTxResetIsEnabled Function
C
bool PLIB_ETH_MCSTxResetIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC Control Sub-layer/Transmit domain logic reset status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - EMAC Control Sub-layer/Transmit domain logic is held in reset
• false - EMAC Control Sub-layer/Transmit domain logic is not in reset
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_MCSTxResetIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2.7 PLIB_ETH_MIIMReadDataGet Function
C
uint16_t PLIB_ETH_MIIMReadDataGet(
ETH_MODULE_ID index
);
Description
This function gets EMAC MIIM management read data after a MII read cycle has completed.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
readData - MII read data
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
readData = PLIB_ETH_MIIMReadDataGet(MY_ETH_INSTANCE);
5.6.8.5.2.8 PLIB_ETH_MIIMReadStart Function
C
void PLIB_ETH_MIIMReadStart(
ETH_MODULE_ID index
);
Description
This function initiates an MII read command. The MII Management module will perform a single read cycle. To get data, use
PLIB_ETH_MIIReadDataGet.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
while (PLIB_ETH_MIIMIsBusy(MY_ETH_INSTANCE))
{
//Wait until MII Link is not busy
}
PLIB_ETH_MIIReadStart(MY_ETH_INSTANCE);
while (PLIB_ETH_MIIReadIsDataNotValid(MY_ETH_INSTANCE))
{
//Wait until read is complete
}
data = PLIB_ETH_MIIReadDataGet(MY_ETH_INSTANCE);
5.6.8.5.2.9 PLIB_ETH_MIIMResetDisable Function
C
void PLIB_ETH_MIIMResetDisable(
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1961
ETH_MODULE_ID index
);
Description
This function disables EMAC Reset MII Management. EMAC will resume normal operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMResetDisable(MY_ETH_INSTANCE);
5.6.8.5.2.10 PLIB_ETH_MIIMResetEnable Function
C
void PLIB_ETH_MIIMResetEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC Reset MII Management and holds the MII Management module in reset while enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
MII Management held in Reset after This function is called. Disable ResetMIIanagement to return to normal operation.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMResetEnable(MY_ETH_INSTANCE);
5.6.8.5.2.11 PLIB_ETH_MIIMResetIsEnabled Function
C
bool PLIB_ETH_MIIMResetIsEnabled(
ETH_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Description
This function gets the EMAC Reset MII Management enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Reset the MII Management module
• false - Normal operation
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_MIIMResetIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2.12 PLIB_ETH_MIIMScanIncrEnable Function
C
void PLIB_ETH_MIIMScanIncrEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC MIIM Scan Increment. The MII Management module will perform read cycles across a range of
PHYs. The read cycles will start from address 1 through the value set in the PHY address register.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
The read cycles will start at PHY address 1 and continue through the value set for as the PHY address register.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMScanIncrEnable(MY_ETH_INSTANCE);
5.6.8.5.2.13 PLIB_ETH_MIIMScanIncrDisable Function
C
void PLIB_ETH_MIIMScanIncrDisable(
ETH_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Description
This function disables the EMAC MIIM Scan Increment. Allows continuous reads of the same PHY.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMScanIncrDisable(MY_ETH_INSTANCE);
5.6.8.5.2.14 PLIB_ETH_MIIMScanIncrIsEnabled Function
C
bool PLIB_ETH_MIIMScanIncrIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC MIIM scan increment enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MII Management module will perform read cycles across a range of PHYs. The read cycles will start from address 1
through the value set in the PHY address register.
• false - Continuous reads of the same PHY
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
ScanIncrement = PLIB_ETH_MIIMScanIncrIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2.15 PLIB_ETH_MIIMScanModeDisable Function
C
void PLIB_ETH_MIIMScanModeDisable(
ETH_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Description
This function disables MIIM scan mode. Scan is disabled for Normal operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMScanModeDisable(MY_ETH_INSTANCE);
5.6.8.5.2.16 PLIB_ETH_MIIMScanModeEnable Function
C
void PLIB_ETH_MIIMScanModeEnable(
ETH_MODULE_ID index
);
Description
This function enables MIIM scan mode. The MII Management module will perform read cycles continuously. (Useful for
monitoring the Link Fail.)
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMScanModeEnable(MY_ETH_INSTANCE);
5.6.8.5.2.17 PLIB_ETH_MIIMScanModeIsEnabled Function
C
bool PLIB_ETH_MIIMScanModeIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the MII management scan enable status.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MII Management module will perform read cycles continuously (for example, useful for monitoring the Link Fail)
• false - Normal operation
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_MIIMScanModeIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2.18 PLIB_ETH_MIIMWriteDataSet Function
C
void PLIB_ETH_MIIMWriteDataSet(
ETH_MODULE_ID index,
uint16_t writeData
);
Description
This function sets the EMAC MIIM write data before initiating write cycle.
Preconditions
Prior to a call to this routine, the PHY and Register addresses should be set using PLIB_ETH_MIIPHYAddressSet and
PLIB_ETH_MIIRegisterAddressSet.
Parameters
Parameters Description
index Identifier for the device instance
writeData MII write data
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMWriteDataSet(MY_ETH_INSTANCE, WriteData);
5.6.8.5.2.19 PLIB_ETH_MIIMWriteStart Function
C
void PLIB_ETH_MIIMWriteStart(
ETH_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1966
Description
This function initiates an MII management read command. The MII Management module will perform a write cycle.
Preconditions
The PHY address and MII register address must be configured before a write using
PLIB_ETH_MIIPHYAddressSet(MY_ETH_INSTANCE, phyAddr) and PLIB_ETH_MIIRegisterAddressSet(MY_ETH_INSTANCE,
regAddr)
Data to be written must be first loaded into the MII write register using PLIB_ETH_MIIMWriteDataSet(MY_ETH_INSTANCE,
writeData)
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIMWriteDataSet(MY_ETH_INSTANCE, dataToWrite);
PLIB_ETH_MIIMWriteStart(MY_ETH_INSTANCE);
5.6.8.5.2.20 PLIB_ETH_MIIResetDisable Function
C
void PLIB_ETH_MIIResetDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC MIIM Soft reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIResetDisable(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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5.6.8.5.2.21 PLIB_ETH_MIIResetEnable Function
C
void PLIB_ETH_MIIResetEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC MIIM soft reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MIIResetEnable(MY_ETH_INSTANCE);
5.6.8.5.2.22 PLIB_ETH_MIIResetIsEnabled Function
C
bool PLIB_ETH_MIIResetIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets EMAC MIIM Soft reset enable status. By default this bit is set to '1'.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - MAC MII is in reset
• false - MAC MII is not in reset
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_MIIResetIsEnabled(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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5.6.8.5.2.23 PLIB_ETH_PHYAddressGet Function
C
uint8_t PLIB_ETH_PHYAddressGet(
ETH_MODULE_ID index
);
Description
This function gets the EMAC MIIM management PHY address.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
phyAddr - A 5-bit address of the PHY
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
phyAddr = PLIB_ETH_PHYAddressGet(MY_ETH_INSTANCE);
5.6.8.5.2.24 PLIB_ETH_PHYAddressSet Function
C
void PLIB_ETH_PHYAddressSet(
ETH_MODULE_ID index,
uint8_t phyAddr
);
Description
This function sets the EMAC MIIM PHY address. This field represents the 5-bit PHY Address field of Management cycles. Up to
31 PHYs can be addressed (0 is reserved).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
phyAddr A 5-bit address of the PHY
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_PHYAddressSet(MY_ETH_INSTANCE, PhyAddr);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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5.6.8.5.2.25 PLIB_ETH_RegisterAddressGet Function
C
uint8_t PLIB_ETH_RegisterAddressGet(
ETH_MODULE_ID index
);
Description
This function gets the EMAC MIIM management register address.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
regAddr - The (5-bit) address of the MII Registers
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
regAddr = PLIB_ETH_RegisterAddressGet(MY_ETH_INSTANCE);
5.6.8.5.2.26 PLIB_ETH_RegisterAddressSet Function
C
void PLIB_ETH_RegisterAddressSet(
ETH_MODULE_ID index,
uint8_t regAddr
);
Description
This function sets the EMAC MIIM register address. Up to 32 registers may be accessed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
regAddr The (5-bit) address of the MII Registers.
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RegisterAddressSet(MY_ETH_INSTANCE, regAddr);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1970
5.6.8.5.2.27 PLIB_ETH_RMIIResetDisable Function
C
void PLIB_ETH_RMIIResetDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC Reset RMII for normal operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RMIIResetDisable(MY_ETH_INSTANCE);
5.6.8.5.2.28 PLIB_ETH_RMIIResetEnable Function
C
void PLIB_ETH_RMIIResetEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC Reset RMII.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RMIIResetEnable(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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5.6.8.5.2.29 PLIB_ETH_RMIIResetIsEnabled Function
C
bool PLIB_ETH_RMIIResetIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC Reset RMII enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Reset the EMAC RMII module
• false - Normal operation
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_RMIIResetIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2.30 PLIB_ETH_RxBufferCountDecrement Function
C
void PLIB_ETH_RxBufferCountDecrement(
ETH_MODULE_ID index
);
Description
This function causes the Receive Descriptor Buffer Counter to decrement by 1.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
Hardware increments the receive buffer counter and software decrements it. If the receive buffer counter is incremented by the
receive logic at the same time, the receive buffer counter will appear unchanged.
Always reads as '0', so there is no get value routine.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Example
PLIB_ETH_RxBufferCountDecrement(MY_ETH_INSTANCE);
5.6.8.5.2.31 PLIB_ETH_RxDisable Function
C
void PLIB_ETH_RxDisable(
ETH_MODULE_ID index
);
Description
This function disables the Ethernet receive logic.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
Disabling Ethernet receive is not recommended for making changes to any receive-related registers. After the receiver has been
enabled, the Ethernet module must be reinitialized to implement changes.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RxDisable(MY_ETH_INSTANCE);
5.6.8.5.2.32 PLIB_ETH_RxEnable Function
C
void PLIB_ETH_RxEnable(
ETH_MODULE_ID index
);
Description
This function enables the Ethernet receive logic. Packets are received and stored in the receive buffer as controlled by the filter
configuration.
Preconditions
All receive registers must be configured before calling this function.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Example
PLIB_ETH_RxEnable(MY_ETH_INSTANCE);
5.6.8.5.2.33 PLIB_ETH_RxFuncResetDisable Function
C
void PLIB_ETH_RxFuncResetDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC reset receive funtion logic. The reset receive function logic is released from reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RxFuncResetDisable(MY_ETH_INSTANCE);
5.6.8.5.2.34 PLIB_ETH_RxFuncResetEnable Function
C
void PLIB_ETH_RxFuncResetEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC reset receive function logic. The receive function logic is held in reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RxFuncResetEnable(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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5.6.8.5.2.35 PLIB_ETH_RxFuncResetIsEnabled Function
C
bool PLIB_ETH_RxFuncResetIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC reset receive function status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - EMAC Receive function logic is held in reset
• false - EMAC Receive function logic is not in reset
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_RxFuncResetIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2.36 PLIB_ETH_RxIsEnabled Function
C
bool PLIB_ETH_RxIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the Ethernet module receive enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Ethernet module receive is enabled
• false - Ethernet module receive is disabled
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_ReceiveIsEnabled(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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5.6.8.5.2.37 PLIB_ETH_RxPacketDescAddrGet Function
C
uint8_t * PLIB_ETH_RxPacketDescAddrGet(
ETH_MODULE_ID index
);
Description
This function gets the address of the next receive descriptor to be used.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
ReceivePacketDescriptorAddress - receive packet descriptor address
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
RxPacketDescAddr = PLIB_ETH_RxPacketDescAddrGet(MY_ETH_INSTANCE);
5.6.8.5.2.38 PLIB_ETH_RxPacketDescAddrSet Function
C
void PLIB_ETH_RxPacketDescAddrSet(
ETH_MODULE_ID index,
uint8_t * rxPacketDescStartAddr
);
Description
This function sets the Ethernet receive packet descriptor start address.
Preconditions
No transmit, receive, or DMA operations should be in progress when this function is called. Call this function before enabling
transmit and receive.
Parameters
Parameters Description
index Identifier for the device instance
rxPacketDescStartAddr This address must be 4-byte aligned. (The least significant 2 bits must be '00'.)
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RxPacketDescAddrSet(MY_ETH_INSTANCE, rxPacketDescStartAddr)
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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5.6.8.5.2.39 PLIB_ETH_TestPauseDisable Function
C
void PLIB_ETH_TestPauseDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC Test Pause. The EMAC will resume normal operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is intended for testing only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TestPauseDisable(MY_ETH_INSTANCE);
5.6.8.5.2.40 PLIB_ETH_TestPauseEnable Function
C
void PLIB_ETH_TestPauseEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC test pause. The EMAC Control sub-layer will inhibit transmissions, just as if a Pause Receive
Control frame with a non-zero pause time parameter was received.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is intended for testing only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1977
Example
PLIB_ETH_TestPauseEnable(MY_ETH_INSTANCE);
5.6.8.5.2.41 PLIB_ETH_TestPauseIsEnabled Function
C
bool PLIB_ETH_TestPauseIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the EMAC test pause enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC Control sub-layer will inhibit transmissions, just as if a Pause Receive Control frame with a non-zero pause
time parameter was received
• false - Normal operation
Remarks
This functionality is intended for testing only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_TestPauseIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2.42 PLIB_ETH_TxFuncResetDisable Function
C
void PLIB_ETH_TxFuncResetDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC Transmit function reset. The EMAC transmit function is released from reset for normal
operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1978
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TxFuncResetDisable(MY_ETH_INSTANCE);
5.6.8.5.2.43 PLIB_ETH_TxFuncResetEnable Function
C
void PLIB_ETH_TxFuncResetEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC transmit function reset. The transmit function is held in reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TxFuncResetEnable(MY_ETH_INSTANCE);
5.6.8.5.2.44 PLIB_ETH_TxFuncResetIsEnabled Function
C
bool PLIB_ETH_TxFuncResetIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC Transmit function reset status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - EMAC transmit function logic is held in reset
• false - EMAC transmit function logic is not in reset
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1979
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TxFuncResetIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2.45 PLIB_ETH_TxPacketDescAddrGet Function
C
uint8_t * PLIB_ETH_TxPacketDescAddrGet(
ETH_MODULE_ID index
);
Description
This function gets the address of the next transmit descriptor.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Transmit Packet Descriptor Start Address.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
txPacketDescAddr = PLIB_ETH_TxPacketDescAddrGet(MY_ETH_INSTANCE);
5.6.8.5.2.46 PLIB_ETH_TxPacketDescAddrSet Function
C
void PLIB_ETH_TxPacketDescAddrSet(
ETH_MODULE_ID index,
uint8_t * txPacketDescStartAddr
);
Description
This function sets the Ethernet transmit packet descriptor start address.
Preconditions
No transmit, receive, or DMA operations should be in progress when this function is called. Call this function before enabling
transmit and receive.
Parameters
Parameters Description
index Identifier for the device instance
txPacketDescStartAddr This address must be 4-byte aligned. (The least significant 2 bits must be '00'.)
Returns
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1980
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TxPacketDescAddrSet(MY_ETH_INSTANCE, txPacketDescStartAddr)
5.6.8.5.2.47 PLIB_ETH_TxRTSDisable Function
C
void PLIB_ETH_TxRTSDisable(
ETH_MODULE_ID index
);
Description
This function aborts an Ethernet module transmission and disables the transmitter after the current packet has completed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
When disabled by software, transmission stops after the current packet has been completed.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TxRTSDisable(MY_ETH_INSTANCE);
5.6.8.5.2.48 PLIB_ETH_TxRTSEnable Function
C
void PLIB_ETH_TxRTSEnable(
ETH_MODULE_ID index
);
Description
This function enables the Ethernet request to send. Transmit logic is activated and packet(s) defined in the Ethernet descriptor
table are transmitted.
Preconditions
The TX descriptor list and TX DMA must be initialized using PLIB_ETH_TransmitPacketDescStartAddrSet.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1981
Remarks
This status is cleared by hardware when the transmission is complete.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TxRTSEnable(MY_ETH_INSTANCE);
5.6.8.5.2.49 PLIB_ETH_TxRTSIsEnabled Function
C
bool PLIB_ETH_TxRTSIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the Ethernet module transmit request to send status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Ethernet module transmit is active
• false - Ethernet module transmission has stopped or has completed
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_TransmitRTSIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.2.50 PLIB_ETH_CRCDisable Function
C
void PLIB_ETH_CRCDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC CRC.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1982
Remarks
The frames presented to the EMAC have a valid CRC
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_CRCDisable(MY_ETH_INSTANCE);
5.6.8.5.2.51 PLIB_ETH_CRCEnable Function
C
void PLIB_ETH_CRCEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC CRC. The EMAC will append CRC whether padding is required or not. This must be enabled if
auto-padding is enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_CRCEnable(MY_ETH_INSTANCE);
5.6.8.5.2.52 PLIB_ETH_CRCIsEnabled Function
C
bool PLIB_ETH_CRCIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the EMAC CRC enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC will append a CRC to every frame whether or not padding was required. Must be set if auto-padding is
enabled.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1983
• false - The frames presented to the EMAC have a valid CRC
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_CRCIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.3 Status Functions
5.6.8.5.3.1 PLIB_ETH_DataNotValid Function
C
bool PLIB_ETH_DataNotValid(
ETH_MODULE_ID index
);
Description
This function gets the MII management read data not valid status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MII Management read cycle has not completed and the read data is not yet valid
• false - The MII Management read cycle is complete and the read data is valid
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_DataNotValid(MY_ETH_INSTANCE);
Also see the example for function: PLIB_ETH_MIIReadStart().
5.6.8.5.3.2 PLIB_ETH_EthernetIsBusy Function
C
bool PLIB_ETH_EthernetIsBusy(
ETH_MODULE_ID index
);
Description
This function sets the value of the Ethernet logic busy. A request indicates that the module has just been turned ON or is
completing a transaction after being turned OFF.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1984
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Ethernet logic has been turned ON or is completing a transaction
• false - Ethernet logic is idle
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_EthernetIsBusy(MY_ETH_INSTANCE);
5.6.8.5.3.3 PLIB_ETH_LinkHasFailed Function
C
bool PLIB_ETH_LinkHasFailed(
ETH_MODULE_ID index
);
Description
This function returns the MII management link fail status. This value reflects the last read from the PHY status register.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MII Management module link fail has occurred
• false - The MII Management module link fail has not occured
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_LinkHasFailed(MY_ETH_INSTANCE);
5.6.8.5.3.4 PLIB_ETH_MIIMIsBusy Function
C
bool PLIB_ETH_MIIMIsBusy(
ETH_MODULE_ID index
);
Description
This function returns the MII management busy status.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1985
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MII Management module is currently performing an MII Management read or write cycle
• false - The MII Management is free
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_MIIMIsBusy(MY_ETH_INSTANCE);
5.6.8.5.3.5 PLIB_ETH_MIIMIsScanning Function
C
bool PLIB_ETH_MIIMIsScanning(
ETH_MODULE_ID index
);
Description
This function gets the MII Management scanning status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MII Management module scan operation (continuous MII Management Read cycles) is in progress
• false - The MII Management scan operation is not in progress
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_MIIMIsScanning(MY_ETH_INSTANCE);
5.6.8.5.3.6 PLIB_ETH_ReceiveIsBusy Function
C
bool PLIB_ETH_ReceiveIsBusy(
ETH_MODULE_ID index
);
Description
This function gets the Ethernet receive logic busy status.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1986
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Receive logic is receiving data
• false - Receive logic is idle
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_ReceiveIsBusy(MY_ETH_INSTANCE);
5.6.8.5.3.7 PLIB_ETH_TransmitIsBusy Function
C
bool PLIB_ETH_TransmitIsBusy(
ETH_MODULE_ID index
);
Description
This function gets the value of the Ethernet transmit logic busy status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Transmit logic is sending data
• false - Transmit logic is idle
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_TransmitIsBusy(MY_ETH_INSTANCE);
5.6.8.5.4 Filtering Functions
5.6.8.5.4.1 PLIB_ETH_HashTableGet Function
C
uint32_t PLIB_ETH_HashTableGet(
ETH_MODULE_ID index
);
Description
This function gets the value of the Hash table.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1987
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
hashTable - Hash table value (64-bits)
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_HashTableGet(MY_ETH_INSTANCE);
5.6.8.5.4.2 PLIB_ETH_HashTableSet Function
C
void PLIB_ETH_HashTableSet(
ETH_MODULE_ID index,
uint64_t hashTableValue
);
Description
This function sets the Hash table with the new value.
Preconditions
Call PLIB_ETH_HashTableFilterDisable to disable the Hash table filter before changing the hash table, or set the Hash Table
prior to calling PLIB_ETH_ReceiveEnable.
Parameters
Parameters Description
index Identifier for the device instance
hashTableValue hash table value (64-bits)
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_HashTableSet(MY_ETH_INSTANCE, hashTableValue);
5.6.8.5.4.3 PLIB_ETH_PassAllDisable Function
C
void PLIB_ETH_PassAllDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC PassAll. Control frames are ignored.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1988
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_PassAllDisable(MY_ETH_INSTANCE);
5.6.8.5.4.4 PLIB_ETH_PassAllEnable Function
C
void PLIB_ETH_PassAllEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC PassAll, which enables both the normal and the control frames to be passed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_PassAllEnable(MY_ETH_INSTANCE);
5.6.8.5.4.5 PLIB_ETH_PassAllIsEnabled Function
C
bool PLIB_ETH_PassAllIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC PassAll enable status.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1989
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC will accept all frames regardless of type (normal vs. Control)
• false - The received Control frames are ignored
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_PassAllIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.4.6 PLIB_ETH_PatternMatchChecksumGet Function
C
uint16_t PLIB_ETH_PatternMatchChecksumGet(
ETH_MODULE_ID index
);
Description
This function gets the value of the patter match checksum register.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
The pattern match checksum.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_PatternMatchChecksumGet(MY_ETH_INSTANCE);
5.6.8.5.4.7 PLIB_ETH_PatternMatchChecksumSet Function
C
void PLIB_ETH_PatternMatchChecksumSet(
ETH_MODULE_ID index,
uint16_t PatternMatchChecksumValue
);
Description
This function sets the pattern match checksum register with the new value.
Preconditions
Call PLIB_ETH_PatternMatchModeSet(ETH_PATTERN_MATCH_DISABLED) to disable PatternMatch before changing the
pattern match mask, or set the value before calling PLIB_ETH_ReceiveEnable.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1990
Parameters
Parameters Description
index Identifier for the device instance to be configured
PatternMatchChecksumValue Pattern match checksum value
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_PatternMatchChecksumSet(MY_ETH_INSTANCE, PatternMatchChecksumValue);
5.6.8.5.4.8 PLIB_ETH_PatternMatchGet Function
C
uint64_t PLIB_ETH_PatternMatchGet(
ETH_MODULE_ID index
);
Description
This function gets the selected value of the patter match mask register.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
patternMatchMaskValue - Pattern Match Mask Values
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_PatternMatchGet(MY_ETH_INSTANCE);
5.6.8.5.4.9 PLIB_ETH_PatternMatchModeGet Function
C
ETH_PATTERN_MATCH_MODE PLIB_ETH_PatternMatchModeGet(
ETH_MODULE_ID index
);
Description
This function gets the selected value of the patter match mask register.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1991
Parameters
Parameters Description
index Identifier for the device instance
Returns
modeSel - The method of pattern matching from ETH_PATTERN_MATCH_DISABLED
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_PatternMatchModeGet(MY_ETH_INSTANCE);
5.6.8.5.4.10 PLIB_ETH_PatternMatchModeSet Function
C
void PLIB_ETH_PatternMatchModeSet(
ETH_MODULE_ID index,
ETH_PATTERN_MATCH_MODE modeSel
);
Description
This function sets the pattern match mode.
Preconditions
Set the value before calling PLIB_ETH_ReceiveEnable().
Parameters
Parameters Description
index Identifier for the device instance
modeSel The method of pattern matching from ETH_PATTERN_MATCH_DISABLED
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_PatternMatchModeSet(MY_ETH_INSTANCE, ETH_PATTERN_MATCH_DISABLED);
5.6.8.5.4.11 PLIB_ETH_PatternMatchOffsetGet Function
C
uint16_t PLIB_ETH_PatternMatchOffsetGet(
ETH_MODULE_ID index
);
Description
This function gets the value of the patter match offset register.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1992
Parameters
Parameters Description
index Identifier for the device instance
Returns
PatternMatchOffsetValue - Pattern match offset value
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
value = PLIB_ETH_PatternMatchOffsetGet(MY_ETH_INSTANCE);
5.6.8.5.4.12 PLIB_ETH_PatternMatchOffsetSet Function
C
void PLIB_ETH_PatternMatchOffsetSet(
ETH_MODULE_ID index,
uint16_t PatternMatchOffsetValue
);
Description
This function sets the pattern match offset register with the new value.
Preconditions
Call PLIB_ETH_PatternMatchModeSet(ETH_PATTERN_MATCH_DISABLED) to disable PatternMatch before changing the
pattern match mask, or set the value before calling PLIB_ETH_ReceiveEnable().
Parameters
Parameters Description
index Identifier for the device instance
PatternMatchOffsetValue Pattern match offset value
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_PatternMatchOffsetSet(MY_ETH_INSTANCE, PatternMatchOffsetValue);
5.6.8.5.4.13 PLIB_ETH_PatternMatchSet Function
C
void PLIB_ETH_PatternMatchSet(
ETH_MODULE_ID index,
uint64_t patternMatchMaskValue
);
Description
This function sets the pattern match mask register with the new value.
Preconditions
Call PLIB_ETH_PatternMatchModeSet(index,ETH_PATTERN_MATCH_DISABLED) to disable PatternMatch before changing
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1993
the pattern match mask, or set the value before calling PLIB_ETH_ReceiveEnable.
Parameters
Parameters Description
index Identifier for the device instance
patternMatchMaskValue Pattern Match Mask Values (64-bits)
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_PatternMatchSet(MY_ETH_INSTANCE, patternMatchMaskValue);
5.6.8.5.4.14 PLIB_ETH_PurePreambleDisable Function
C
void PLIB_ETH_PurePreambleDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC pure preamble enforcement. The EMAC does not perform any preamble checking.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Example
PLIB_ETH_PurePreambleDisable(MY_ETH_INSTANCE);
Rsemarks: This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
5.6.8.5.4.15 PLIB_ETH_PurePreambleEnable Function
C
void PLIB_ETH_PurePreambleEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC pure preamble enforcement. The EMAC will verify the contents of the preamble and discard
packets with errors in the preamble.
sPrecondition: None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1994
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
The EMAC will verify the content of the preamble to ensure it contains 0x55 and is error-free. A packet with errors in its preamble
is discarded.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_PurePreambleEnable(MY_ETH_INSTANCE);
5.6.8.5.4.16 PLIB_ETH_PurePreambleIsEnabled Function
C
bool PLIB_ETH_PurePreambleIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC pure preamble enforcement enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC will verify the content of the preamble to ensure it contains 0x55 and is error-free. A packet with errors in its
preamble is discarded.
• false - The EMAC does not perform any preamble checking
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_PurePreambleIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.4.17 PLIB_ETH_ReceiveFilterDisable Function
C
void PLIB_ETH_ReceiveFilterDisable(
ETH_MODULE_ID index,
ETH_RECEIVE_FILTER filter
);
Description
This function disables the specified receive filter.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1995
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
filter The selection of receive filters to be disabled from the enumerated selection
ETH_RECEIVE_FILTER
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ReceiveFilterDisable(index,
ETH_CRC_OK_FILTER |
ETH_RUNT_ENABLE_FILTER |
ETH_UNICAST_FILTER );
5.6.8.5.4.18 PLIB_ETH_ReceiveFilterEnable Function
C
void PLIB_ETH_ReceiveFilterEnable(
ETH_MODULE_ID index,
ETH_RECEIVE_FILTER filter
);
Description
This function enables the specified receive filter.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
filter The selection of receive filters to be enabled from the enumerated selection
ETH_RECEIVE_FILTER
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ReceiveFilterEnable(index,
ETH_CRC_OK_FILTER |
ETH_RUNT_ENABLE_FILTER |
ETH_UNICAST_FILTER );
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1996
5.6.8.5.4.19 PLIB_ETH_ReceiveFilterIsEnable Function
C
bool PLIB_ETH_ReceiveFilterIsEnable(
ETH_MODULE_ID index,
ETH_RECEIVE_FILTER filter
);
Description
This function disables the specified receive filter.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
filter The selection of receive filters to be disabled from the enumerated selection
ETH_RECEIVE_FILTER
Returns
• true - If at least one of the specified filters is enabled
• false - If no specified filter is enabled
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
if (PLIB_ETH_ReceiveFilterIsEnable(index, ETH_UNICAST_FILTER))
{
PLIB_ETH_ReceiveFilterDisable(MY_MODULE_ID, ETH_UNICAST_FILTER);
}
5.6.8.5.4.20 PLIB_ETH_StationAddressGet Function
C
uint8_t PLIB_ETH_StationAddressGet(
ETH_MODULE_ID index,
uint8_t which
);
Description
This function gets the selected EMAC station address.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
which Select station address to change. Valid values are 1,2,3,4,5,6.
Returns
stationAddress1 - Station address
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1997
Remarks
On a reset, this register is loaded with the factory preprogrammed station address.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stationAddr1 = PLIB_ETH_StationAddress1Get(MY_ETH_INSTANCE, which);
5.6.8.5.4.21 PLIB_ETH_StationAddressSet Function
C
void PLIB_ETH_StationAddressSet(
ETH_MODULE_ID index,
uint8_t which,
uint8_t stationAddress
);
Description
This function sets the selected EMAC Station Address.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
which Select station address to change. Valid values are 1,2,3,4,5,6.
stationAddress Station Address.
Returns
None.
Remarks
On a reset, this register is loaded with the factory preprogrammed station address.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_StationAddressSet(MY_ETH_INSTANCE, which, stationAddress);
5.6.8.5.5 Flow Control Functions
5.6.8.5.5.1 PLIB_ETH_AutoFlowControlDisable Function
C
void PLIB_ETH_AutoFlowControlDisable(
ETH_MODULE_ID index
);
Description
This function disables the Ethernet Automatic Flow Control logic.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1998
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_AutoFlowControlDisable(MY_ETH_INSTANCE);
5.6.8.5.5.2 PLIB_ETH_AutoFlowControlEnable Function
C
void PLIB_ETH_AutoFlowControlEnable(
ETH_MODULE_ID index
);
Description
This function enables Ethernet Automatic Flow Control logic.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
The full and empty watermarks are used to automatically enable and disable flow control, respectively. When the number of
received buffers rises to the full watermark, flow control is automatically enabled. When the receive buffer count falls to the
empty watermark, flow control is automatically disabled.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_AutoFlowControlEnable(MY_ETH_INSTANCE);
5.6.8.5.5.3 PLIB_ETH_AutoFlowControlIsEnabled Function
C
bool PLIB_ETH_AutoFlowControlIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the Ethernet Automatic Flow Control enable status.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-1999
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Ethernet module Automatic Flow Control is enabled
• false - Ethernet module Autmoatic Flow Control is disabled
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_AutoFlowControlIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.5.4 PLIB_ETH_BackPresNoBackoffDisable Function
C
void PLIB_ETH_BackPresNoBackoffDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC back pressure/no back-off. The EMAC will back-off when there is backpressure and collisions
occur.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_BackPresNoBackoffDisable(MY_ETH_INSTANCE);
5.6.8.5.5.5 PLIB_ETH_BackPresNoBackoffEnable Function
C
void PLIB_ETH_BackPresNoBackoffEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC backpressure/no back-off. The EMAC will not back-off when there is backpressure and collisions
occur.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2000
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
The EMAC after incidentally causing a collision during backpressure will immediately retransmit without back-off reducing the
chance of further collisions and ensuring transmit packets get sent.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_BackPresNoBackoffEnable(MY_ETH_INSTANCE);
5.6.8.5.5.6 PLIB_ETH_BackPresNoBackoffIsEnabled Function
C
bool PLIB_ETH_BackPresNoBackoffIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC back pressure/no back-off enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC after incidentally causing a collision during backpressure will immediately retransmit without back-off
reducing the chance of further collisions and ensuring transmit packets get sent
• false - The EMAC will not remove the back-off
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_BackPresNoBackoffIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.5.7 PLIB_ETH_ManualFlowControlDisable Function
C
void PLIB_ETH_ManualFlowControlDisable(
ETH_MODULE_ID index
);
Description
This function disables the Ethernet Manual Flow Control logic and automatically sends a Pause frame with a 0x0000 Pause
Timer value. This function affects both transmit and receive operations.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
Disabling Manual Flow Control will automatically send a Pause frame with a 0x0000 Pause Timer value to disable flow control.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ManualFlowControlDisable(MY_ETH_INSTANCE);
5.6.8.5.5.8 PLIB_ETH_ManualFlowControlEnable Function
C
void PLIB_ETH_ManualFlowControlEnable(
ETH_MODULE_ID index
);
Description
This function enables the Ethernet Manual Flow Control logic. Enabling Manual Flow Control will send a Pause frame using the
Pause Timer value. While enabled, a Pause frame is repeated every 128 x (Pause timer value)/2 transmit clock cycles.
Affects both transmit and receive operations.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ManualFlowControlEnable(MY_ETH_INSTANCE);
5.6.8.5.5.9 PLIB_ETH_ManualFlowControlIsEnabled Function
C
bool PLIB_ETH_ManualFlowControlIsEnabled(
ETH_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Description
This function returns the Ethernet module Manual Flow Control enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Ethernet module Manual Flow Control is enabled
• false - Ethernet module Manual Flow Control is disabled
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_ManualFlowControlIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.5.10 PLIB_ETH_NoBackoffDisable Function
C
void PLIB_ETH_NoBackoffDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC no back-off. The EMAC will back-off when a collision occurs.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_NoBackoffDisable(MY_ETH_INSTANCE);
5.6.8.5.5.11 PLIB_ETH_NoBackoffEnable Function
C
void PLIB_ETH_NoBackoffEnable(
ETH_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2003
Description
This function enables EMAC no back-off. The EMAC will not back-off when a collision occurs.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
Following a collision, the EMAC will immediately retransmit rather than using the Binary Exponential Back-off algorithm as
specified in the Standard.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_NoBackoffEnable(MY_ETH_INSTANCE);
5.6.8.5.5.12 PLIB_ETH_NoBackoffIsEnabled Function
C
bool PLIB_ETH_NoBackoffIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC no back-off enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Following a collision, the EMAC will immediately retransmit
• false - Following a collision, the EMAC will use the Binary Exponential Back-off algorithm
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_NoBackoffIsEnabled(MY_ETsH_INSTANCE);
5.6.8.5.5.13 PLIB_ETH_RxEmptyWmarkGet Function
C
uint8_t PLIB_ETH_RxEmptyWmarkGet(
ETH_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2004
Description
This function gets the Ethernet receive empty watermark.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
receiveEmptyWmark - Empty watermark value
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
watermarkValue = PLIB_ETH_RxEmptyWmarkGet(MY_ETH_INSTANCE);
5.6.8.5.5.14 PLIB_ETH_RxEmptyWmarkSet Function
C
void PLIB_ETH_RxEmptyWmarkSet(
ETH_MODULE_ID index,
uint8_t watermarkValue
);
Description
This function sets the Ethernet receive empty water mark with a new value. The software controlled Receive Buffer Empty
Wmark is compared against the receive buffer count to determine the empty watermark condition for the empty watermark
interrupt and for disabling flow control if Auto Flow Control is enabled.
The Full Wmark value should always be greater than the Empty Wmark value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
watermarkValue Empty watermark value
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RxEmptyWmarkSet(MY_ETH_INSTANCE, watermarkValue);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2005
5.6.8.5.5.15 PLIB_ETH_RxFullWmarkGet Function
C
uint8_t PLIB_ETH_RxFullWmarkGet(
ETH_MODULE_ID index
);
Description
This function gets the Ethernet receive full watermark.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
receiveFullWmark - Full watermark value
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
watermarkValue = PLIB_ETH_RxFullWmarkGet(MY_ETH_INSTANCE);
5.6.8.5.5.16 PLIB_ETH_RxFullWmarkSet Function
C
void PLIB_ETH_RxFullWmarkSet(
ETH_MODULE_ID index,
uint8_t watermarkValue
);
Description
This function sets the Ethernet receive full water mark with a new value.
The software controlled RX Buffer Full Wmark Pointer is compared against the receive buffer count to determine the full
watermark condition for the full watermark interrupt and for enabling flow control if Auto Flow Control is enabled.
The Full Wmark value should always be greater than the Empty Wmark value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
watermarkValue Full watermark value
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2006
Example
PLIB_ETH_RxFullWmarkSet(MY_ETH_INSTANCE, watermarkValue);
5.6.8.5.5.17 PLIB_ETH_RxPauseDisable Function
C
void PLIB_ETH_RxPauseDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC receive flow control. The received Pause Flow control frames are ignored.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RxPauseDisable(MY_ETH_INSTANCE);
5.6.8.5.5.18 PLIB_ETH_RxPauseEnable Function
C
void PLIB_ETH_RxPauseEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC receive flow control. The EMAC will act upon the received Pause frames.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RxPauseEnable(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2007
5.6.8.5.5.19 PLIB_ETH_RxPauseIsEnabled Function
C
bool PLIB_ETH_RxPauseIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC receive flow pause enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC acts upon received Pause Flow Control frames
• false - Received Pause Flow Control frames are ignored
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
status = PLIB_ETH_RxPauseIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.5.20 PLIB_ETH_ShortcutQuantaDisable Function
C
void PLIB_ETH_ShortcutQuantaDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC shortcut pause quanta. The EMAC will resume normal operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ShortcutQuantaDisable(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2008
5.6.8.5.5.21 PLIB_ETH_ShortcutQuantaEnable Function
C
void PLIB_ETH_ShortcutQuantaEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC shortcut pause quanta. The EMAC reduces the effective pause auanta from 64 byte-times to 1
byte-time.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is intended for testing only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_ShortcutQuantaEnable(MY_ETH_INSTANCE);
5.6.8.5.5.22 PLIB_ETH_ShortcutQuantaIsEnabled Function
C
bool PLIB_ETH_ShortcutQuantaIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns EMAC shortcut pause quanta enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC reduces the effective Pause Quanta from 64 byte-times to 1 byte-time
• false - Normal operation
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_ShortcutQuantaIsEnabled(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2009
5.6.8.5.5.23 PLIB_ETH_SimResetDisable Function
C
void PLIB_ETH_SimResetDisable(
ETH_MODULE_ID index
);
Description
This function disables the EMAC simulation reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_SimResetDisable(MY_ETH_INSTANCE);
5.6.8.5.5.24 PLIB_ETH_SimResetEnable Function
C
void PLIB_ETH_SimResetEnable(
ETH_MODULE_ID index
);
Description
This function enables the EMAC simulation reset and resets the random number generator within the transmit (TX) function.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_SimResetEnable(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2010
5.6.8.5.5.25 PLIB_ETH_SimResetIsEnabled Function
C
bool PLIB_ETH_SimResetIsEnabled(
ETH_MODULE_ID index
);
Description
This function returns the EMAC simulation reset status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Simulation Reset is enabled
• false - Simulation Reset is disabled
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
stat = PLIB_ETH_SimResetIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.5.26 PLIB_ETH_TestBackPressDisable Function
C
void PLIB_ETH_TestBackPressDisable(
ETH_MODULE_ID index
);
Description
This function disables EMAC Test backpressure. The EMAC will resume normal operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TestBackPressDisable(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2011
5.6.8.5.5.27 PLIB_ETH_TestBackPressEnable Function
C
void PLIB_ETH_TestBackPressEnable(
ETH_MODULE_ID index
);
Description
This function enables EMAC Test backpressure. The EMAC will assert backpressure on the link. Backpressure causes preamble
to be transmitted, raising carrier sense. A transmit packet from the system will be sent during backpressure.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is intended for testing only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TestBackPressEnable(MY_ETH_INSTANCE);
5.6.8.5.5.28 PLIB_ETH_TestBackPressIsEnabled Function
C
bool PLIB_ETH_TestBackPressIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the EMAC test backpressure enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EMAC will assert backpressure on the link. Backpressure causes the preamble to be transmitted, raising the carrier
sense. A transmit packet from the system will be sent during backpressure.
• false - Normal operation
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2012
Example
PLIB_ETH_TestBackPressIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.5.29 PLIB_ETH_TxPauseDisable Function
C
void PLIB_ETH_TxPauseDisable(
ETH_MODULE_ID index
);
Description
This function disables the transmit Pause frames. The Pause frames are blocked from being transmitted.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TxPauseDisable(MY_ETH_INSTANCE);
5.6.8.5.5.30 PLIB_ETH_TxPauseEnable Function
C
void PLIB_ETH_TxPauseEnable(
ETH_MODULE_ID index
);
Description
This function enables the tansmission Pause frames. The Pause frames are allowed for transmission.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_TxPauseEnable(MY_ETH_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2013
5.6.8.5.5.31 PLIB_ETH_TxPauseIsEnabled Function
C
bool PLIB_ETH_TxPauseIsEnabled(
ETH_MODULE_ID index
);
Description
This function gets the Ethernet module enable status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - Pause Flow Control frames are allowed to be transmitted
• false - Pause Flow Control frames are blocked
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
status = PLIB_ETH_TxPauseIsEnabled(MY_ETH_INSTANCE);
5.6.8.5.6 Interrupt Functions
5.6.8.5.6.1 PLIB_ETH_InterruptClear Function
C
void PLIB_ETH_InterruptClear(
ETH_MODULE_ID index,
ETH_INTERRUPT_SOURCES intmask
);
Description
This function clears the Ethernet module interrupt source status using a mask. Logically 'OR' the masks together. Any masks not
ORed with the others will be disabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
intmask Members of ETH_INTERRUPT_SOURCES logically ORed together
Returns
None.
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Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
// To clear several interrupts with one command, execute the following:
PLIB_ETH_InterruptClear(MY_ETH_INSTANCE,
ETH_EMPTY_WATERMARK_INTERRUPT |
ETH_FULL_WATERMARK_INTERRUPT |
ETH_RX_FIFO_OVERFLOW_ERROR_INTERRUPT );
5.6.8.5.6.2 PLIB_ETH_InterruptSet Function
C
void PLIB_ETH_InterruptSet(
ETH_MODULE_ID index,
ETH_INTERRUPT_SOURCES intmask
);
Description
This function sets the Ethernet module interrupt source status using a mask. Logically 'OR' the masks together. Any masks not
OR'd with the others will be disabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
intmask Members of ETH_INTERRUPT_SOURCES logically ORed together
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
// To set several interrupt flags with one command, execute the following:
PLIB_ETH_InterruptSet(MY_ETH_INSTANCE,
ETH_EMPTY_WATERMARK_INTERRUPT |
ETH_FULL_WATERMARK_INTERRUPT |
ETH_RX_FIFO_OVERFLOW_ERROR_INTERRUPT );
5.6.8.5.6.3 PLIB_ETH_InterruptsGet Function
C
ETH_INTERRUPT_SOURCES PLIB_ETH_InterruptsGet(
ETH_MODULE_ID index
);
Description
Gets the Ethernet module Interrupt Flag register as a group.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2015
Parameters
Parameters Description
index Identifier for the device instance
Returns
Interrupt bit map, as defined in ETH_INTERRUPT_SOURCES, showing which interrupts have fired.
Remarks
none.
Example
5.6.8.5.6.4 PLIB_ETH_InterruptSourceDisable Function
C
void PLIB_ETH_InterruptSourceDisable(
ETH_MODULE_ID index,
ETH_INTERRUPT_SOURCES intmask
);
Description
This function disables the Ethernet module interrupts by using a mask to select one or multiple interrupts to disable. Logically
'OR' elements of ETH_INTERRUPT_SOURCES together.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
intmask Members of ETH_INTERRUPT_SOURCES logically ORed together
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
// To disable some interrupts with one command, execute the following:
PLIB_ETH_InterruptSourceDisble(MY_ETH_INSTANCE,
ETH_TRANSMIT_DONE_INTERRUPT |
ETH_TRANSMIT_ABORT_INTERRUPT |
ETH_RECEIVE_BUFFER_NOT_AVAILABLE_INTERRUPT |
ETH_RECEIVE_FIFO_OVERFLOW_ERROR_INTERRUPT );
// Or to disable one interrupt with one command, execute the following:
PLIB_ETH_InterruptSourceDisble(MY_ETH_INSTANCE, ETH_TRANSMIT_DONE_INTERRUPT);
// Or to disable all interrupts with one command, execute the following:
PLIB_ETH_InterruptSourceDisble(MY_ETH_INSTANCE, ETH_ALL_ETH_INTERRUPTS);
5.6.8.5.6.5 PLIB_ETH_InterruptSourceEnable Function
C
void PLIB_ETH_InterruptSourceEnable(
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2016
ETH_MODULE_ID index,
ETH_INTERRUPT_SOURCES intmask
);
Description
This function enables the Ethernet module interrupts by using a mask to enable one or multiple interrupt enables. Logically 'OR'
elements of ETH_INTERRUPT_SOURCES together.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
intmask Members of ETH_INTERRUPT_SOURCES logically ORed together
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
// To enable some interrupts with one command, execute the following:
PLIB_ETH_InterruptSourceEnable(MY_ETH_INSTANCE,
ETH_TRANSMIT_DONE_INTERRUPT |
ETH_TRANSMIT_ABORT_INTERRUPT |
ETH_RECEIVE_BUFFER_NOT_AVAILABLE_INTERRUPT |
ETH_RECEIVE_FIFO_OVERFLOW_ERROR_INTERRUPT);
// Or to enable one interrupt with one command, execute the following:
PLIB_ETH_InterruptSourceEnable(MY_ETH_INSTANCE, ETH_TRANSMIT_DONE_INTERRUPT);
// Or to enable all interrupts with one command, execute the following:
PLIB_ETH_InterruptSourceEnable(MY_ETH_INSTANCE, ETH_ALL_ETH_INTERRUPTS);
5.6.8.5.6.6 PLIB_ETH_InterruptSourceIsEnabled Function
C
bool PLIB_ETH_InterruptSourceIsEnabled(
ETH_MODULE_ID index,
ETH_INTERRUPT_SOURCES intmask
);
Description
This function returns a true if any of the specified interupt sources are enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
mask The interrupt mask(s) to be checked
Returns
• true - If any of the specified sources are enabled
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2017
• false - If none of the specified sources are enabled
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
if ( PLIB_ETH_InterruptSourceIsEnabled(index, ETH_TRANSMIT_DONE_INTERRUPT))
{
//If the interrupt is enabled, disable it...
PLIB_ETH_InterruptSourceDisable(index, ETH_TRANSMIT_DONE_INTERRUPT);
}
5.6.8.5.6.7 PLIB_ETH_InterruptSourcesGet Function
C
ETH_INTERRUPT_SOURCES PLIB_ETH_InterruptSourcesGet(
ETH_MODULE_ID index
);
Description
This function returns the entire interrupt enable register.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Bit map of interrupt sources, all ORed together, as defined by ETH_INTERRUPT_SOURCES.
Remarks
None.
Example
5.6.8.5.6.8 PLIB_ETH_InterruptStatusGet Function
C
bool PLIB_ETH_InterruptStatusGet(
ETH_MODULE_ID index,
ETH_INTERRUPT_SOURCES intmask
);
Description
This function gets the Ethernet module Interrupt Flag register using a mask.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
intmask Members of ETH_INTERRUPT_SOURCES logically ORed together
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2018
Returns
• true - If any of the specified source statuses are enabled
• false - If none of the specified source statuses are enabled
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
if (PLIB_ETH_InterruptStatusGet(index, ETH_TRANSMIT_DONE_INTERRUPT))
{
PLIB_ETH_InterruptClear(index, ETH_TRANSMIT_DONE_INTERRUPT);
}
5.6.8.5.7 Statistics Functions
5.6.8.5.7.1 PLIB_ETH_AlignErrorCountClear Function
C
void PLIB_ETH_AlignErrorCountClear(
ETH_MODULE_ID index
);
Description
This function sets the count of Ethernet alignment errors to zero.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
value count of alignment errors
Returns
None.
Remarks
Setting or clearing any bits in this register should be done for debug/test purposes only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_AlignErrorCountClear(MY_ETH_INSTANCE);
5.6.8.5.7.2 PLIB_ETH_AlignErrorCountGet Function
C
uint16_t PLIB_ETH_AlignErrorCountGet(
ETH_MODULE_ID index
);
Description
This function gets the count of Ethernet alignment errors.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2019
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
value - Count of alignment errors
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
count = PLIB_ETH_AlignErrorCountGet(MY_ETH_INSTANCE);
5.6.8.5.7.3 PLIB_ETH_FCSErrorCountClear Function
C
void PLIB_ETH_FCSErrorCountClear(
ETH_MODULE_ID index
);
Description
This function sets the value of the Ethernet frame check sequence error to zero.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
value Count of FCS Errors
Returns
None.
Remarks
Setting or clearing any bits in this register should be done for debug/test purposes only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_FCSErrorCountClear(MY_ETH_INSTANCE);
5.6.8.5.7.4 PLIB_ETH_FCSErrorCountGet Function
C
uint16_t PLIB_ETH_FCSErrorCountGet(
ETH_MODULE_ID index
);
Description
This function gets the count of the frame check sequence error.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2020
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
value - Count of FCS Errors
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
count = PLIB_ETH_FCSErrorCountGet(MY_ETH_INSTANCE);
5.6.8.5.7.5 PLIB_ETH_FramesRxdOkCountClear Function
C
void PLIB_ETH_FramesRxdOkCountClear(
ETH_MODULE_ID index
);
Description
This function sets the value of the Ethernet frames 'OK' count to zero.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
value Count of frames received correctly
Returns
None.
Remarks
Changing the value of this register should be done for debug/test purposes only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_FramesRxdOkCountClear(MY_ETH_INSTANCE);
5.6.8.5.7.6 PLIB_ETH_FramesRxdOkCountGet Function
C
uint16_t PLIB_ETH_FramesRxdOkCountGet(
ETH_MODULE_ID index
);
Description
This function gets the count of the frames received successfully. Increment count for frames received successfully by the RX
Filter. This count will not be incremented if there is a Frame Check Sequence (FCS) or Alignment error.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2021
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
value - Count of frames received correctly
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
count = PLIB_ETH_FramesRxdOkCountGet(MY_ETH_INSTANCE);
5.6.8.5.7.7 PLIB_ETH_FramesTxdOkCountClear Function
C
void PLIB_ETH_FramesTxdOkCountClear(
ETH_MODULE_ID index
);
Description
This function sets the count of Ethernet Control frames transmitted to zero.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
value Count of control frames transmitted correctly
Returns
None.
Remarks
Setting or clearing any bits in this register should be done for debug/test purposes only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_FramesTxdOkCountClear(MY_ETH_INSTANCE);
5.6.8.5.7.8 PLIB_ETH_FramesTxdOkCountGet Function
C
uint16_t PLIB_ETH_FramesTxdOkCountGet(
ETH_MODULE_ID index
);
Description
This function gets the count of Ethernet Control Frames transmitted successfully.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2022
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
count - count of control frames transmitted correctly
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
count = PLIB_ETH_FramesTxdOkCountGet(MY_ETH_INSTANCE);
5.6.8.5.7.9 PLIB_ETH_MultipleCollisionCountClear Function
C
void PLIB_ETH_MultipleCollisionCountClear(
ETH_MODULE_ID index
);
Description
This function sets the value of the Ethernet multiple collision frame count to zero.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
value Count of multiple collision frames
Returns
None.
Remarks
Setting or clearing any bits in this register should be done for debug/test purposes only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_MultipleCollisionCountClear(MY_ETH_INSTANCE);
5.6.8.5.7.10 PLIB_ETH_MultipleCollisionCountGet Function
C
uint16_t PLIB_ETH_MultipleCollisionCountGet(
ETH_MODULE_ID index
);
Description
This function gets the count of the frames transmitted successfully after there was more than one collision.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2023
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
count - Count of multiple collision frames
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
count = PLIB_ETH_MultipleCollisionCountGet(MY_ETH_INSTANCE);
5.6.8.5.7.11 PLIB_ETH_RxOverflowCountClear Function
C
void PLIB_ETH_RxOverflowCountClear(
ETH_MODULE_ID index
);
Description
This function sets the value of the Ethernet receive overflow count to zero. Increment counter for frames accepted by the RX
filter and subsequently dropped due to internal receive error. This event also sets the receive overflow interrupt flag.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
None.
Remarks
Setting or clearing any bits in this register should be done for debug/test purposes only.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_RxOverflowCountClear(MY_ETH_INSTANCE);
5.6.8.5.7.12 PLIB_ETH_RxOverflowCountGet Function
C
uint16_t PLIB_ETH_RxOverflowCountGet(
ETH_MODULE_ID index
);
Description
This function gets the count of the dropped Ethernet receive frames.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2024
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
count - uint16_t receiver overflow counts
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
count = PLIB_ETH_RxOverflowCountGet(MY_ETH_INSTANCE);
5.6.8.5.7.13 PLIB_ETH_RxPacketCountGet Function
C
uint8_t PLIB_ETH_RxPacketCountGet(
ETH_MODULE_ID index
);
Description
This function gets the value of the the receive packet buffer count. When a packet has been successfully received, this value is
incremented by hardware. Software decrements the counter after a packet has been read. Call
PLIB_ETH_ReceiveBufferCountDecrement(ETH_MODULE_ID index) to decrement.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
RxPacketCount - Number of received packets in memory
Remarks
Receive Packet Buffer Counter cannot be decremented below 0x00 Cleared when the Ethernet module is reset.
The Receive Packet Buffer Count is not set to '0' when the Ethernet module is turned OFF. This allows software to continue to
utilize and decrement the count.
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
count = PLIB_ETH_RxPacketCountGet(MY_ETH_INSTANCE);
5.6.8.5.7.14 PLIB_ETH_SingleCollisionCountClear Function
C
void PLIB_ETH_SingleCollisionCountClear(
ETH_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2025
Description
This function sets the value of the Ethernet single collision frame count to zero.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
value Count of single collision frames
Returns
None.
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_ETH_SingleCollisionCountClear(MY_ETH_INSTANCE);
5.6.8.5.7.15 PLIB_ETH_SingleCollisionCountGet Function
C
uint16_t PLIB_ETH_SingleCollisionCountGet(
ETH_MODULE_ID index
);
Description
This function gets the count of the frames transmitted successfully on a second attempt.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
count - Count of frames transmitted successfully on second attempt
Remarks
This functionality is not available on all devices. Please refer to the specific device data sheet to determine availability.
Example
count = PLIB_ETH_SingleCollisionCountGet(MY_ETH_INSTANCE);
5.6.8.5.8 Existence Functions
5.6.8.5.8.1 PLIB_ETH_ExistsAlignmentErrorCount Function
C
bool PLIB_ETH_ExistsAlignmentErrorCount(
ETH_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2026
);
Description
This function identifies whether the AlignmentErrorCount feature is available on the Ethernet module. When this function returns
true, these functions are supported on the device:
• PLIB_ETH_AlignErrorCountClear
• PLIB_ETH_AlignErrorCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlignmentErrorCount feature is supported on the device
• false - The AlignmentErrorCount feature is not supported on the device
Remarks
None.
5.6.8.5.8.2 PLIB_ETH_ExistsAutoFlowControl Function
C
bool PLIB_ETH_ExistsAutoFlowControl(
ETH_MODULE_ID index
);
Description
This function identifies whether the AutoFlowControl feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_AutoFlowControlEnable
• PLIB_ETH_AutoFlowControlDisable
• PLIB_ETH_AutoFlowControlIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AutoFlowControl feature is supported on the device
• false - The AutoFlowControl feature is not supported on the device
Remarks
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2027
5.6.8.5.8.3 PLIB_ETH_ExistsCollisionCounts Function
C
bool PLIB_ETH_ExistsCollisionCounts(
ETH_MODULE_ID index
);
Description
This function identifies whether the CollisionCounts feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_SingleCollisionCountClear
• PLIB_ETH_SingleCollisionCountGet
• PLIB_ETH_MultipleCollisionCountClear
• PLIB_ETH_MultipleCollisionCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CollisionCounts feature is supported on the device
• false - The CollisionCounts feature is not supported on the device
Remarks
None.
5.6.8.5.8.4 PLIB_ETH_ExistsCollisionWindow Function
C
bool PLIB_ETH_ExistsCollisionWindow(
ETH_MODULE_ID index
);
Description
This function identifies whether the CollisionWindow feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_CollisionWindowGet
• PLIB_ETH_CollisionWindowSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CollisionWindow feature is supported on the device
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5-2028
• false - The CollisionWindow feature is not supported on the device
Remarks
None.
5.6.8.5.8.5 PLIB_ETH_ExistsEnable Function
C
bool PLIB_ETH_ExistsEnable(
ETH_MODULE_ID index
);
Description
This function identifies whether the Enable feature is available on the Ethernet module. When this function returns true, these
functions are supported on the device:
• PLIB_ETH_Enable
• PLIB_ETH_Disable
• PLIB_ETH_IsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Enable feature is supported on the device
• false - The Enable feature is not supported on the device
Remarks
None.
5.6.8.5.8.6 PLIB_ETH_ExistsEthernetControllerStatus Function
C
bool PLIB_ETH_ExistsEthernetControllerStatus(
ETH_MODULE_ID index
);
Description
This function identifies whether the EthernetControllerStatus feature is available on the Ethernet module. When this function
returns true, these functions are supported on the device:
• PLIB_ETH_RxPacketCountGet
• PLIB_ETH_EthernetIsBus
• PLIB_ETH_TransmitIsBusy
• PLIB_ETH_ReceiveIsBusy
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2029
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EthernetControllerStatus feature is supported on the device
• false - The EthernetControllerStatus feature is not supported on the device
Remarks
None.
5.6.8.5.8.7 PLIB_ETH_ExistsFCSErrorCount Function
C
bool PLIB_ETH_ExistsFCSErrorCount(
ETH_MODULE_ID index
);
Description
This function identifies whether the FCSErrorCount feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_FCSErrorCountClear
• PLIB_ETH_FCSErrorCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FCSErrorCount feature is supported on the device
• false - The FCSErrorCount feature is not supported on the device
Remarks
None.
5.6.8.5.8.8 PLIB_ETH_ExistsFramesTransmittedOK Function
C
bool PLIB_ETH_ExistsFramesTransmittedOK(
ETH_MODULE_ID index
);
Description
This function identifies whether the FramesTransmittedOK feature is available on the Ethernet module. When this function
returns true, these functions are supported on the device:
• PLIB_ETH_FramesTxdOkCountClear
• PLIB_ETH_FramesTxdOkCountGet
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2030
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FramesTransmittedOK feature is supported on the device
• false - The FramesTransmittedOK feature is not supported on the device
Remarks
None.
5.6.8.5.8.9 PLIB_ETH_ExistsFramexReceivedOK Function
C
bool PLIB_ETH_ExistsFramexReceivedOK(
ETH_MODULE_ID index
);
Description
This function identifies whether the FramexReceivedOK feature is available on the Ethernet module. When this function returns
true, these functions are supported on the device:
• PLIB_ETH_FramesRxdOkCountClear
• PLIB_ETH_FramesRxdOkCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FramexReceivedOK feature is supported on the device
• false - The FramexReceivedOK feature is not supported on the device
Remarks
None.
5.6.8.5.8.10 PLIB_ETH_ExistsHashTable Function
C
bool PLIB_ETH_ExistsHashTable(
ETH_MODULE_ID index
);
Description
This function identifies whether the HashTable feature is available on the Ethernet module. When this function returns true, these
functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2031
• PLIB_ETH_HashTableSet
• PLIB_ETH_HashTableGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The HashTable feature is supported on the device
• false - The HashTable feature is not supported on the device
Remarks
None.
5.6.8.5.8.11 PLIB_ETH_ExistsInterPacketGaps Function
C
bool PLIB_ETH_ExistsInterPacketGaps(
ETH_MODULE_ID index
);
Description
This function identifies whether the InterPacketGaps feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_BackToBackIPGGet
• PLIB_ETH_BackToBackIPGSet
• PLIB_ETH_NonBackToBackIPG1Get
• PLIB_ETH_NonBackToBackIPG1Set
• PLIB_ETH_NonBackToBackIPG2Get
• PLIB_ETH_NonBackToBackIPG2Set
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The InterPacketGaps feature is supported on the device
• false - The InterPacketGaps feature is not supported on the device
Remarks
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2032
5.6.8.5.8.12 PLIB_ETH_ExistsInterrupt Function
C
bool PLIB_ETH_ExistsInterrupt(
ETH_MODULE_ID index
);
Description
This function identifies whether the Interrupt feature is available on the Ethernet module. When this function returns true, these
functions are supported on the device:
• PLIB_ETH_InterruptSourceEnable
• PLIB_ETH_InterruptSourceDisable
• PLIB_ETH_InterruptSourceIsEnabled
• PLIB_ETH_InterruptSet
• PLIB_ETH_InterruptClear
• PLIB_ETH_InterruptStatusGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Interrupt feature is supported on the device
• false - The Interrupt feature is not supported on the device
Remarks
None.
5.6.8.5.8.13 PLIB_ETH_ExistsMAC_Configuration Function
C
bool PLIB_ETH_ExistsMAC_Configuration(
ETH_MODULE_ID index
);
Description
This function identifies whether the MAC_Configuration feature is available on the Ethernet module. When this function returns
true, these functions are supported on the device:
• PLIB_ETH_LoopbackEnable
• PLIB_ETH_LoopbackDisable
• PLIB_ETH_LoopbackIsEnabled
• PLIB_ETH_TxPauseEnable
• PLIB_ETH_TxPauseDisable
• PLIB_ETH_TxPauseIsEnabled
• PLIB_ETH_RxPauseEnable
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2033
• PLIB_ETH_RxPauseDisable
• PLIB_ETH_RxPauseIsEnabled
• PLIB_ETH_PassAllEnable
• PLIB_ETH_PassAllDisable
• PLIB_ETH_PassAllIsEnabled
• PLIB_ETH_ReceiveEnable
• PLIB_ETH_ReceiveDisable
• PLIB_ETH_ReceiveIsEnabled
• PLIB_ETH_ExcessDeferEnable
• PLIB_ETH_ExcessDeferDisable
• PLIB_ETH_ExcessDeferIsEnabled
• PLIB_ETH_BackPresNoBackoffEnable
• PLIB_ETH_BackPresNoBackoffDisable
• PLIB_ETH_BackPresNoBackoffIsEnabled
• PLIB_ETH_NoBackoffEnable
• PLIB_ETH_NoBackoffDisable
• PLIB_ETH_NoBackoffIsEnabled
• PLIB_ETH_LongPreambleEnable
• PLIB_ETH_LongPreambleDisable
• PLIB_ETH_LongPreambleIsEnabled
• PLIB_ETH_PurePreambleEnable
• PLIB_ETH_PurePreambleDisable
• PLIB_ETH_PurePreambleIsEnabled
• PLIB_ETH_AutoDetectPadGet
• PLIB_ETH_AutoDetectPadSet
• PLIB_ETH_AutoDetectPadClear
• PLIB_ETH_CRCEnable
• PLIB_ETH_CRCDisable
• PLIB_ETH_CRCIsEnabled
• PLIB_ETH_DelayedCRCEnable
• PLIB_ETH_DelayedCRCDisable
• PLIB_ETH_DelayedCRCIsEnabled
• PLIB_ETH_HugeFrameEnable
• PLIB_ETH_HugeFrameDisable
• PLIB_ETH_HugeFrameIsEnabled
• PLIB_ETH_FrameLengthCheckEnable
• PLIB_ETH_FrameLengthCheckDisable
• PLIB_ETH_FrameLengthCheckIsEnabled
• PLIB_ETH_FullDuplexEnable
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2034
• PLIB_ETH_FullDuplexDisable
• PLIB_ETH_FullDuplexIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MAC_Configuration feature is supported on the device
• false - The MAC_Configuration feature is not supported on the device
Remarks
None.
5.6.8.5.8.14 PLIB_ETH_ExistsMAC_Resets Function
C
bool PLIB_ETH_ExistsMAC_Resets(
ETH_MODULE_ID index
);
Description
This function identifies whether the MAC_Resets feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_MIIResetEnable
• PLIB_ETH_MIIResetDisable
• PLIB_ETH_MIIResetIsEnabled
• PLIB_ETH_SimResetEnable
• PLIB_ETH_SimResetDisable
• PLIB_ETH_SimResetIsEnabled
• PLIB_ETH_MCSRxResetEnable
• PLIB_ETH_MCSRxResetDisable
• PLIB_ETH_MCSRxResetIsEnabled
• PLIB_ETH_RxFuncResetEnable
• PLIB_ETH_RxFuncResetDisable
• PLIB_ETH_RxFuncResetIsEnabled
• PLIB_ETH_MCSTxResetEnable
• PLIB_ETH_MCSTxResetDisable
• PLIB_ETH_MCSTxResetIsEnabled
• PLIB_ETH_TxFuncResetEnable
• PLIB_ETH_TxFuncResetDisable
• PLIB_ETH_TxFuncResetIsEnabled
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2035
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MAC_Resets feature is supported on the device
• false - The MAC_Resets feature is not supported on the device
Remarks
None.
5.6.8.5.8.15 PLIB_ETH_ExistsMAC_Testing Function
C
bool PLIB_ETH_ExistsMAC_Testing(
ETH_MODULE_ID index
);
Description
This function identifies whether the MAC_Testing feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_TestBackPressEnable
• PLIB_ETH_TestBackPressDisable
• PLIB_ETH_TestBackPressIsEnabled
• PLIB_ETH_TestPauseEnable
• PLIB_ETH_TestPauseDisable
• PLIB_ETH_TestPauseIsEnabled
• PLIB_ETH_ShortcutQuantaEnable
• PLIB_ETH_ShortcutQuantaDisable
• PLIB_ETH_ShortcutQuantaIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MAC_Testing feature is supported on the device
• false - The MAC_Testing feature is not supported on the device
Remarks
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2036
5.6.8.5.8.16 PLIB_ETH_ExistsManualFlowControl Function
C
bool PLIB_ETH_ExistsManualFlowControl(
ETH_MODULE_ID index
);
Description
This function identifies whether the ManualFlowControl feature is available on the Ethernet module. When this function returns
true, these functions are supported on the device:
• PLIB_ETH_ManualFlowControlEnable
• PLIB_ETH_ManualFlowControlDisable
• PLIB_ETH_ManualFlowControlIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ManualFlowControl feature is supported on the device
• false - The ManualFlowControl feature is not supported on the device
Remarks
None.
5.6.8.5.8.17 PLIB_ETH_ExistsMaxFrameLength Function
C
bool PLIB_ETH_ExistsMaxFrameLength(
ETH_MODULE_ID index
);
Description
This function identifies whether the MaxFrameLength feature is available on the Ethernet module. When this function returns
true, these functions are supported on the device:
• PLIB_ETH_MaxFrameLengthGet
• PLIB_ETH_MaxFrameLengthSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MaxFrameLength feature is supported on the device
• false - The MaxFrameLength feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2037
Remarks
None.
5.6.8.5.8.18 PLIB_ETH_ExistsMIIM_Config Function
C
bool PLIB_ETH_ExistsMIIM_Config(
ETH_MODULE_ID index
);
Description
This function identifies whether the MIIM_Config feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_MIIMResetEnable
• PLIB_ETH_MIIMResetDisable
• PLIB_ETH_MIIMResetIsEnabled
• PLIB_ETH_MIIMClockGet
• PLIB_ETH_MIIMClockSet
• PLIB_ETH_MIIMNoPreEnable
• PLIB_ETH_MIIMNoPreDisable
• PLIB_ETH_MIIMNoPreIsEnabled
• PLIB_ETH_MIIMScanIncrEnable
• PLIB_ETH_MIIMScanIncrDisable
• PLIB_ETH_MIIMScanIncrIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MIIM_Config feature is supported on the device
• false - The MIIM_Config feature is not supported on the device
Remarks
None.
5.6.8.5.8.19 PLIB_ETH_ExistsMIIM_Indicators Function
C
bool PLIB_ETH_ExistsMIIM_Indicators(
ETH_MODULE_ID index
);
Description
This function identifies whether the MIIM_Indicators feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2038
• PLIB_ETH_LinkHasFailed
• PLIB_ETH_DataNotValid
• PLIB_ETH_MIIMIsScanning
• PLIB_ETH_MIIMIsBusy
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MIIM_Indicators feature is supported on the device
• false - The MIIM_Indicators feature is not supported on the device
Remarks
None.
5.6.8.5.8.20 PLIB_ETH_ExistsMIIMAddresses Function
C
bool PLIB_ETH_ExistsMIIMAddresses(
ETH_MODULE_ID index
);
Description
This function identifies whether the MIIMAddresses feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_PHYAddressGet
• PLIB_ETH_PHYAddressSet
• PLIB_ETH_RegisterAddressGet
• PLIB_ETH_RegisterAddressSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MIIMAddresses feature is supported on the device
• false - The MIIMAddresses feature is not supported on the device
Remarks
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
5-2039
5.6.8.5.8.21 PLIB_ETH_ExistsMIIMReadWrite Function
C
bool PLIB_ETH_ExistsMIIMReadWrite(
ETH_MODULE_ID index
);
Description
This function identifies whether the MIIMReadWrite feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_MIIMReadStart
• PLIB_ETH_MIIMWriteStart
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MIIMReadWrite feature is supported on the device
• false - The MIIMReadWrite feature is not supported on the device
Remarks
None.
5.6.8.5.8.22 PLIB_ETH_ExistsMIIMScanMode Function
C
bool PLIB_ETH_ExistsMIIMScanMode(
ETH_MODULE_ID index
);
Description
This function identifies whether the MIIMScanMode feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_MIIMScanModeEnable
• PLIB_ETH_MIIMScanModeDisable
• PLIB_ETH_MIIMScanModeIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MIIMScanMode feature is supported on the device
• false - The MIIMScanMode feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Remarks
None.
5.6.8.5.8.23 PLIB_ETH_ExistsMIIWriteReadData Function
C
bool PLIB_ETH_ExistsMIIWriteReadData(
ETH_MODULE_ID index
);
Description
This function identifies whether the MIIWriteReadData feature is available on the Ethernet module. When this function returns
true, these functions are supported on the device:
• PLIB_ETH_MIIMWriteDataSet
• PLIB_ETH_MIIMReadDataGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MIIWriteReadData feature is supported on the device
• false - The MIIWriteReadData feature is not supported on the device
Remarks
None.
5.6.8.5.8.24 PLIB_ETH_ExistsPatternMatch Function
C
bool PLIB_ETH_ExistsPatternMatch(
ETH_MODULE_ID index
);
Description
This function identifies whether the PatternMatch feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_PatternMatchSet
• PLIB_ETH_PatternMatchGet
• PLIB_ETH_PatternMatchChecksumSet
• PLIB_ETH_PatternMatchChecksumGet
• PLIB_ETH_PatternMatchOffsetSet
• PLIB_ETH_PatternMatchOffsetGet
• PLIB_ETH_PatternMatchModeSet
• PLIB_ETH_PatternMatchModeGet
5.6 Peripheral Library Help MPLAB Harmony Help Ethernet Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PatternMatch feature is supported on the device
• false - The PatternMatch feature is not supported on the device
Remarks
None.
5.6.8.5.8.25 PLIB_ETH_ExistsPauseTimer Function
C
bool PLIB_ETH_ExistsPauseTimer(
ETH_MODULE_ID index
);
Description
This function identifies whether the PauseTimer feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_PauseTimerSet
• PLIB_ETH_PauseTimerGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PauseTimer feature is supported on the device
• false - The PauseTimer feature is not supported on the device
Remarks
None.
5.6.8.5.8.26 PLIB_ETH_ExistsReceiveBufferSize Function
C
bool PLIB_ETH_ExistsReceiveBufferSize(
ETH_MODULE_ID index
);
Description
This function identifies whether the ReceiveBufferSize feature is available on the Ethernet module. When this function returns
true, these functions are supported on the device:
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• PLIB_ETH_ReceiveBufferSizeGet
• PLIB_ETH_ReceiveBufferSizeSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiveBufferSize feature is supported on the device
• false - The ReceiveBufferSize feature is not supported on the device
Remarks
None.
5.6.8.5.8.27 PLIB_ETH_ExistsReceiveFilters Function
C
bool PLIB_ETH_ExistsReceiveFilters(
ETH_MODULE_ID index
);
Description
This function identifies whether the ReceiveFilters feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_ReceiveFilterEnable
• PLIB_ETH_ReceiveFilterDisable
• PLIB_ETH_ReceiveFilterIsEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiveFilters feature is supported on the device
• false - The ReceiveFilters feature is not supported on the device
Remarks
None.
5.6.8.5.8.28 PLIB_ETH_ExistsReceiveOverflowCount Function
C
bool PLIB_ETH_ExistsReceiveOverflowCount(
ETH_MODULE_ID index
);
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Description
This function identifies whether the ReceiveOverflowCount feature is available on the Ethernet module. When this function
returns true, these functions are supported on the device:
• PLIB_ETH_RxOverflowCountClear
• PLIB_ETH_RxOverflowCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiveOverflowCount feature is supported on the device
• false - The ReceiveOverflowCount feature is not supported on the device
Remarks
None.
5.6.8.5.8.29 PLIB_ETH_ExistsReceiveWmarks Function
C
bool PLIB_ETH_ExistsReceiveWmarks(
ETH_MODULE_ID index
);
Description
This function identifies whether the ReceiveWmarks feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_RxFullWmarkSet
• PLIB_ETH_RxFullWmarkGet
• PLIB_ETH_RxEmptyWmarkSet
• PLIB_ETH_RxEmptyWmarkGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiveWmarks feature is supported on the device
• false - The ReceiveWmarks feature is not supported on the device
Remarks
None.
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5.6.8.5.8.30 PLIB_ETH_ExistsRetransmissionMaximum Function
C
bool PLIB_ETH_ExistsRetransmissionMaximum(
ETH_MODULE_ID index
);
Description
This function identifies whether the RetransmissionMaximum feature is available on the Ethernet module. When this function
returns true, these functions are supported on the device:
• PLIB_ETH_ReTxMaxGet
• PLIB_ETH_ReTxMaxSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RetransmissionMaximum feature is supported on the device
• false - The RetransmissionMaximum feature is not supported on the device
Remarks
None.
5.6.8.5.8.31 PLIB_ETH_ExistsRMII_Support Function
C
bool PLIB_ETH_ExistsRMII_Support(
ETH_MODULE_ID index
);
Description
This function identifies whether the RMII_Support feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_RMIIResetEnable
• PLIB_ETH_RMIIResetDisable
• PLIB_ETH_RMIIResetIsEnabled
• PLIB_ETH_RMIISpeedGet
• PLIB_ETH_RMIISpeedSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The RMII_Support feature is supported on the device
• false - The RMII_Support feature is not supported on the device
Remarks
None.
5.6.8.5.8.32 PLIB_ETH_ExistsRxBufferCountDecrement Function
C
bool PLIB_ETH_ExistsRxBufferCountDecrement(
ETH_MODULE_ID index
);
Description
This function identifies whether the RxBufferCountDecrement feature is available on the Ethernet module. When this function
returns true, this function is supported on the device:
• PLIB_ETH_RxBufferCountDecrement
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RxBufferCountDecrement feature is supported on the device
• false - The RxBufferCountDecrement feature is not supported on the device
Remarks
None.
5.6.8.5.8.33 PLIB_ETH_ExistsRxEnable Function
C
bool PLIB_ETH_ExistsRxEnable(
ETH_MODULE_ID index
);
Description
This function identifies whether the ReceiveEnable feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_RxEnable
• PLIB_ETH_RxDisable
• PLIB_ETH_RxIsEnabled
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiveEnable feature is supported on the device
• false - The ReceiveEnable feature is not supported on the device
Remarks
None.
5.6.8.5.8.34 PLIB_ETH_ExistsRxPacketDescriptorAddress Function
C
bool PLIB_ETH_ExistsRxPacketDescriptorAddress(
ETH_MODULE_ID index
);
Description
This function identifies whether the RxPacketDescriptorAddress feature is available on the Ethernet module. When this function
returns true, these functions are supported on the device:
• PLIB_ETH_RxPacketDescAddrSet
• PLIB_ETH_RxPacketDescAddrGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RxPacketDescriptorAddress feature is supported on the device
• false - The RxPacketDescriptorAddress feature is not supported on the device
Remarks
None.
5.6.8.5.8.35 PLIB_ETH_ExistsStationAddress Function
C
bool PLIB_ETH_ExistsStationAddress(
ETH_MODULE_ID index
);
Description
This function identifies whether the StationAddress feature is available on the Ethernet module. When this function returns true,
these functions are supported on the device:
• PLIB_ETH_StationAddressGet
• PLIB_ETH_StationAddressSet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StationAddress feature is supported on the device
• false - The StationAddress feature is not supported on the device
Remarks
None.
5.6.8.5.8.36 PLIB_ETH_ExistsStopInIdle Function
C
bool PLIB_ETH_ExistsStopInIdle(
ETH_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the Ethernet module. When this function returns true, these
functions are supported on the device:
• PLIB_ETH_StopInIdleEnable
• PLIB_ETH_StopInIdleDisable
• PLIB_ETH_StopInIdleIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StopInIdle feature is supported on the device
• false - The StopInIdle feature is not supported on the device
Remarks
None.
5.6.8.5.8.37 PLIB_ETH_ExistsTransmitRTS Function
C
bool PLIB_ETH_ExistsTransmitRTS(
ETH_MODULE_ID index
);
Description
This function identifies whether the TransmitRTS feature is available on the Ethernet module. When this function returns true,
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these functions are supported on the device:
• PLIB_ETH_TxRTSEnable
• PLIB_ETH_TxRTSDisable
• PLIB_ETH_TxRTSIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitRTS feature is supported on the device
• false - The TransmitRTS feature is not supported on the device
Remarks
None.
5.6.8.5.8.38 PLIB_ETH_ExistsTxPacketDescriptorAddress Function
C
bool PLIB_ETH_ExistsTxPacketDescriptorAddress(
ETH_MODULE_ID index
);
Description
This function identifies whether the TxPacketDescriptorAddress feature is available on the Ethernet module. When this function
returns true, these functions are supported on the device:
• PLIB_ETH_TxPacketDescAddrSet
• PLIB_ETH_TxPacketDescAddrGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TxPacketDescriptorAddress feature is supported on the device
• false - The TxPacketDescriptorAddress feature is not supported on the device
Remarks
None.
5.6.8.5.9 Data Types and Constants
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5.6.8.5.9.1 ETH_AUTOPAD_OPTION Enumeration
C
typedef enum {
ETH_AUTOPAD_DISABLED_CHECK_CRC,
ETH_AUTOPAD_TO_60BYTES_ADD_CRC,
ETH_AUTOPAD_TO_64BYTES_ADD_CRC,
ETH_AUTOPAD_BY_PKT_TYPE_ADD_CRC
} ETH_AUTOPAD_OPTION;
Description
AutoDetectPad Selection
This enumeration lists the possible automatic padding configurations.
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.8.5.9.2 ETH_INTERRUPT_SOURCES Enumeration
C
typedef enum {
ETH_TRANSMIT_BVCI_BUS_ERROR_INTERRUPT,
ETH_RECEIVE_BVCI_BUS_ERROR_INTERRUPT,
ETH_EMPTY_WATERMARK_INTERRUPT,
ETH_FULL_WATERMARK_INTERRUPT,
ETH_RECEIVE_DONE_INTERRUPT,
ETH_PACKET_PENDING_INTERRUPT,
ETH_RECEIVE_ACTIVITY_INTERRUPT,
ETH_TRANSMIT_DONE_INTERRUPT,
ETH_TRANSMIT_ABORT_INTERRUPT,
ETH_RECEIVE_BUFFER_NOT_AVAILABLE_INTERRUPT,
ETH_RECEIVE_FIFO_OVERFLOW_ERROR_INTERRUPT,
ETH_ALL_INTERRUPT_SOURCES
} ETH_INTERRUPT_SOURCES;
Description
ETH Module Interrupt Mask
This enumeration lists the possible values of ETH_INTERRUPT_SOURCES.
Remarks
See also ETH_LEGACY_EVENTS in plib_eth_legacy.h.
5.6.8.5.9.3 ETH_MIIM_CLK Enumeration
C
typedef enum {
ETH_MIIM_SYSCLK_DIV_BY_4,
ETH_MIIM_SYSCLK_DIV_RSVD,
ETH_MIIM_SYSCLK_DIV_BY_6,
ETH_MIIM_SYSCLK_DIV_BY_8,
ETH_MIIM_SYSCLK_DIV_BY_10,
ETH_MIIM_SYSCLK_DIV_BY_14,
ETH_MIIM_SYSCLK_DIV_BY_20,
ETH_MIIM_SYSCLK_DIV_BY_28,
ETH_MIIM_SYSCLK_DIV_BY_40
} ETH_MIIM_CLK;
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Description
MII Clock Selection
This enumeration lists the possible speed selection for RMII. The body contains only two states: RMII_10Mbps or
RMII_100Mbps.
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.8.5.9.4 ETH_PATTERN_MATCH_MODE Type
C
typedef enum _ETH_PATTERN_MATCH_MODE_ ETH_PATTERN_MATCH_MODE;
Description
Pattern Match Modes
This enumeration lists the pattern match mode values.
Remarks
In all pattern match enabled cases, it is the pattern match inversion XOR pattern match checksum AND .
Some states were omitted from the enumeration since they were duplicates.
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.8.5.9.5 ETH_RECEIVE_FILTER Enumeration
C
typedef enum {
ETH_HASH_FILTER,
ETH_MAGIC_PACKET_FILTER,
ETH_PATTERN_MATCH_INVERSION,
ETH_CRC_ERROR_FILTER,
ETH_CRC_OK_FILTER,
ETH_RUNT_ERROR_FILTER,
ETH_RUNT_ENABLE_FILTER,
ETH_UNICAST_FILTER,
ETH_NOT_ME_UNICAST_FILTER,
ETH_MULTICAST_FILTER,
ETH_BROADCAST_FILTER,
ETH_ENABLE_ALL_FILTER
} ETH_RECEIVE_FILTER;
Description
ETH Module Receive Filter Mask
This enumeration lists the possible values of the receive filter.
Members
Members Description
ETH_HASH_FILTER Enable: Hash Table Filtering.
ETH_MAGIC_PACKET_FILTER Enable: Magic Packet Filtering.
ETH_PATTERN_MATCH_INVERSION Enable: Pattern Match Checksum must not match to be accepted.
ETH_CRC_ERROR_FILTER Enable: Received packet CRC must be invalid to be accepted.
ETH_CRC_OK_FILTER Enable: Received packet CRC must be valid to be accepted.
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ETH_RUNT_ERROR_FILTER Enable: Received packet must be runt packet to be accepted.
ETH_RUNT_ENABLE_FILTER Enable: Received packet must not be a runt packet to be accepted.
ETH_UNICAST_FILTER Enable: Unicast Packets whose destination address matches the station address
are accepted.
ETH_NOT_ME_UNICAST_FILTER Enable: Unicast Packets whose destination address do NOT match the station
address are accepted.
ETH_MULTICAST_FILTER Enable: Multicast Address Packets are accepted.
ETH_BROADCAST_FILTER Enable: Broadcast Address Packets are accepted.
ETH_ENABLE_ALL_FILTER Enable: All of the above packets are accepted.
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.8.5.9.6 ETH_RMII_SPEED Enumeration
C
typedef enum {
ETH_RMII_10Mbps,
ETH_RMII_100Mps
} ETH_RMII_SPEED;
Description
RMII Speed Selection
This enumeration lists the possible speed selection for RMII. The body contains only two states: RMII_10Mbps or
RMII_100Mbps.
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.8.6 Files
Files
Name Description
plib_eth.h Defines the Ethernet Peripheral Library Interface.
Description
5.6.8.6.1 plib_eth.h
Ethernet Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Ethernet Peripheral Library for Microchip microcontrollers. The definitions in this file are for the Ethernet module.
Enumerations
Name Description
ETH_AUTOPAD_OPTION Lists the possible automatic padding configurations.
ETH_INTERRUPT_SOURCES Lists the possible values of ETH_INTERRUPT_SOURCES.
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ETH_MIIM_CLK Lists the possible speed selection for the Reduced Media Independent Interface
(RMII).
ETH_RECEIVE_FILTER Lists the possible values of the receive filter.
ETH_RMII_SPEED Lists the possible speed selection for the Reduced Media Independent Interface
(RMII).
Functions
Name Description
PLIB_ETH_AlignErrorCountClear Sets the count of Ethernet alignment errors to zero.
PLIB_ETH_AlignErrorCountGet Gets the count of Ethernet alignment errors.
PLIB_ETH_AutoDetectPadClear Clears the EMAC Auto-Pad option.
PLIB_ETH_AutoDetectPadGet Gets the current EMAC Auto-Pad setting.
PLIB_ETH_AutoDetectPadSet Sets the EMAC Auto-Pad option.
PLIB_ETH_AutoFlowControlDisable Disables the Ethernet module Automatic Flow Control logic.
PLIB_ETH_AutoFlowControlEnable Enables the Ethernet Automatic Flow Control logic.
PLIB_ETH_AutoFlowControlIsEnabled Gets the Ethernet module Automatic Flow Control status.
PLIB_ETH_BackPresNoBackoffDisable Disables EMAC back pressure/no backo-ff.
PLIB_ETH_BackPresNoBackoffEnable Enables EMAC back pressure/no back-off.
PLIB_ETH_BackPresNoBackoffIsEnabled Gets the EMAC back pressure/no back-off enable status.
PLIB_ETH_BackToBackIPGGet Gets the EMAC back-to-back interpacket gap.
PLIB_ETH_BackToBackIPGSet Sets the EMAC back-to-back interpacket gap.
PLIB_ETH_CollisionWindowGet Gets the EMAC collision window.
PLIB_ETH_CollisionWindowSet Sets the EMAC collision window.
PLIB_ETH_CRCDisable Disables EMAC CRC.
PLIB_ETH_CRCEnable Enables EMAC CRC.
PLIB_ETH_CRCIsEnabled Gets the EMAC CRC enable status.
PLIB_ETH_DataNotValid Gets the MII management read data not valid status.
PLIB_ETH_DelayedCRCDisable Disables EMAC delayed CRC.
PLIB_ETH_DelayedCRCEnable Enables EMAC delayed CRC.
PLIB_ETH_DelayedCRCIsEnabled Gets the EMAC delayed CRC enable status.
PLIB_ETH_Disable Disables the Ethernet module.
PLIB_ETH_Enable Enables the Ethernet module.
PLIB_ETH_EthernetIsBusy Gets the status value of the Ethernet logic busy.
PLIB_ETH_ExcessDeferDisable Disables EMAC excess defer.
PLIB_ETH_ExcessDeferEnable Enables EMAC excess defer.
PLIB_ETH_ExcessDeferIsEnabled Gets the EMAC excess defer enable status.
PLIB_ETH_ExistsAlignmentErrorCount Identifies whether the AlignmentErrorCount feature exists on the
Ethernet module.
PLIB_ETH_ExistsAutoFlowControl Identifies whether the AutoFlowControl feature exists on the
Ethernet module.
PLIB_ETH_ExistsCollisionCounts Identifies whether the CollisionCounts feature exists on the
Ethernet module.
PLIB_ETH_ExistsCollisionWindow Identifies whether the CollisionWindow feature exists on the
Ethernet module.
PLIB_ETH_ExistsEnable Identifies whether the Enable feature exists on the Ethernet module.
PLIB_ETH_ExistsEthernetControllerStatus Identifies whether the EthernetControllerStatus feature exists on
the Ethernet module.
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PLIB_ETH_ExistsFCSErrorCount Identifies whether the FCSErrorCount feature exists on the
Ethernet module.
PLIB_ETH_ExistsFramesTransmittedOK Identifies whether the FramesTransmittedOK feature exists on the
Ethernet module.
PLIB_ETH_ExistsFramexReceivedOK Identifies whether the FramexReceivedOK feature exists on the
Ethernet module.
PLIB_ETH_ExistsHashTable Identifies whether the HashTable feature exists on the Ethernet
module.
PLIB_ETH_ExistsInterPacketGaps Identifies whether the InterPacketGaps feature exists on the
Ethernet module.
PLIB_ETH_ExistsInterrupt Identifies whether the Interrupt feature exists on the Ethernet
module.
PLIB_ETH_ExistsMAC_Configuration Identifies whether the MAC_Configuration feature exists on the
Ethernet module.
PLIB_ETH_ExistsMAC_Resets Identifies whether the MAC_Resets feature exists on the Ethernet
module.
PLIB_ETH_ExistsMAC_Testing Identifies whether the MAC_Testing feature exists on the Ethernet
module.
PLIB_ETH_ExistsManualFlowControl Identifies whether the ManualFlowControl feature exists on the
Ethernet module.
PLIB_ETH_ExistsMaxFrameLength Identifies whether the MaxFrameLength feature exists on the
Ethernet module.
PLIB_ETH_ExistsMIIM_Config Identifies whether the MIIM_Config feature exists on the Ethernet
module.
PLIB_ETH_ExistsMIIM_Indicators Identifies whether the MIIM_Indicators feature exists on the
Ethernet module.
PLIB_ETH_ExistsMIIMAddresses Identifies whether the MIIMAddresses feature exists on the
Ethernet module.
PLIB_ETH_ExistsMIIMReadWrite Identifies whether the MIIMReadWrite feature exists on the
Ethernet module.
PLIB_ETH_ExistsMIIMScanMode Identifies whether the MIIMScanMode feature exists on the
Ethernet module.
PLIB_ETH_ExistsMIIWriteReadData Identifies whether the MIIWriteReadData feature exists on the
Ethernet module.
PLIB_ETH_ExistsPatternMatch Identifies whether the PatternMatch feature exists on the Ethernet
module.
PLIB_ETH_ExistsPauseTimer Identifies whether the PauseTimer feature exists on the Ethernet
module.
PLIB_ETH_ExistsReceiveBufferSize Identifies whether the ReceiveBufferSize feature exists on the
Ethernet module.
PLIB_ETH_ExistsReceiveFilters Identifies whether the ReceiveFilters feature exists on the Ethernet
module.
PLIB_ETH_ExistsReceiveOverflowCount Identifies whether the ReceiveOverflowCount feature exists on the
Ethernet module.
PLIB_ETH_ExistsReceiveWmarks Identifies whether the ReceiveWmarks feature exists on the
Ethernet module.
PLIB_ETH_ExistsRetransmissionMaximum Identifies whether the RetransmissionMaximum feature exists on
the Ethernet module.
PLIB_ETH_ExistsRMII_Support Identifies whether the RMII_Support feature exists on the Ethernet
module.
PLIB_ETH_ExistsRxBufferCountDecrement Identifies whether the RxBufferCountDecrement feature exists on
the Ethernet module.
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PLIB_ETH_ExistsRxEnable Identifies whether the ReceiveEnable feature exists on the Ethernet
module.
PLIB_ETH_ExistsRxPacketDescriptorAddress Identifies whether the RxPacketDescriptorAddress feature exists on
the Ethernet module.
PLIB_ETH_ExistsStationAddress Identifies whether the StationAddress feature exists on the Ethernet
module.
PLIB_ETH_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the Ethernet
module.
PLIB_ETH_ExistsTransmitRTS Identifies whether the TransmitRTS feature exists on the Ethernet
module.
PLIB_ETH_ExistsTxPacketDescriptorAddress Identifies whether the TxPacketDescriptorAddress feature exists on
the Ethernet module.
PLIB_ETH_FCSErrorCountClear Sets the value of the Ethernet frame check sequence error to zero.
PLIB_ETH_FCSErrorCountGet Gets the count of the frame check sequence error.
PLIB_ETH_FrameLengthCheckDisable Disables the EMAC frame length check.
PLIB_ETH_FrameLengthCheckEnable Enables the EMAC frame length check.
PLIB_ETH_FrameLengthCheckIsEnabled Gets the EMAC frame length check status.
PLIB_ETH_FramesRxdOkCountClear Sets the value of the Ethernet received frames 'OK' count to zero.
PLIB_ETH_FramesRxdOkCountGet Gets the count of the frames frames received successfully.
PLIB_ETH_FramesTxdOkCountClear Sets the count of Ethernet Control frames transmitted to zero.
PLIB_ETH_FramesTxdOkCountGet Gets the count of Ethernet Control Frames transmitted successfully.
PLIB_ETH_FullDuplexDisable Disables the EMAC full duplex operatio.
PLIB_ETH_FullDuplexEnable Enables the EMAC full deuplex operation.
PLIB_ETH_FullDuplexIsEnabled Gets the EMAC full duplex enable status.
PLIB_ETH_HashTableGet Gets the value of the Hash table.
PLIB_ETH_HashTableSet Sets the Ethernet module Hash table with the new value.
PLIB_ETH_HugeFrameDisable Disables the EMAC from receiving huge frames.
PLIB_ETH_HugeFrameEnable Enables the EMAC to receive huge frames.
PLIB_ETH_HugeFrameIsEnabled Gets the EMAC huge frame enable status.
PLIB_ETH_InterruptClear Clears the Ethernet module interrupt source status as a group,
using a mask.
PLIB_ETH_InterruptSet Sets the Ethernet module interrupt source status as a group, using
a mask.
PLIB_ETH_InterruptsGet Gets the Ethernet module Interrupt Flag register as a group.
PLIB_ETH_InterruptSourceDisable Clears the Ethernet module Interrupt Enable register as a group,
using a mask.
PLIB_ETH_InterruptSourceEnable Sets the Ethernet module Interrupt Enable register in a group, using
a mask.
PLIB_ETH_InterruptSourceIsEnabled Gets the Ethernet module Interrupt Enable register singularly or as
a group.
PLIB_ETH_InterruptSourcesGet Returns the entire interrupt enable register.
PLIB_ETH_InterruptStatusGet Gets the Ethernet module Interrupt Flag register as a group, using
a mask.
PLIB_ETH_IsEnabled Gets the Ethernet module enable status.
PLIB_ETH_LinkHasFailed Gets the MII management link fail status.
PLIB_ETH_LongPreambleDisable Disables EMAC long preamble enforcement.
PLIB_ETH_LongPreambleEnable Enables EMAC long preamble enforcement.
PLIB_ETH_LongPreambleIsEnabled Gets the EMAC long preamble enforcement enable status.
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PLIB_ETH_LoopbackDisable Disables the EMAC loopback logic.
PLIB_ETH_LoopbackEnable Enables the EMAC loopback logic.
PLIB_ETH_LoopbackIsEnabled Gets the EMAC Loopback interface enable status.
PLIB_ETH_ManualFlowControlDisable Disable Ethernet module Manual Flow Control logic.
PLIB_ETH_ManualFlowControlEnable Enables the Ethernet Manual Flow Control logic.
PLIB_ETH_ManualFlowControlIsEnabled Gets the Ethernet module Manual Flow Control enable status.
PLIB_ETH_MaxFrameLengthGet Gets the EMAC maximum frame length.
PLIB_ETH_MaxFrameLengthSet Sets the EMAC maximum frame length.
PLIB_ETH_MCSRxResetDisable Disables the reset EMAC Control Sub-layer/Receive domain logic.
PLIB_ETH_MCSRxResetEnable Enables the reset EMAC Control Sub-layer/Receive domain logic.
PLIB_ETH_MCSRxResetIsEnabled Gets the EMAC Control Sub-layer/Receive domain logic reset
status.
PLIB_ETH_MCSTxResetDisable Disables the reset EMAC Control Sub-layer/Transmit domain logic.
PLIB_ETH_MCSTxResetEnable Enables the reset of EMAC Control Sub-layer/Transmit domain
logic.
PLIB_ETH_MCSTxResetIsEnabled Gets the EMAC Control Sub-layer/Transmit domain logic reset
status.
PLIB_ETH_MIIMClockGet Gets the current EMAC MIIM clock selection.
PLIB_ETH_MIIMClockSet Sets the EMAC MIM clock selection.
PLIB_ETH_MIIMIsBusy Gets the MII management busy status.
PLIB_ETH_MIIMIsScanning Gets the MII Management scanning status.
PLIB_ETH_MIIMNoPreDisable Disables EMAC No Preamble (allows preamble).
PLIB_ETH_MIIMNoPreEnable Enables EMAC MIIM No Preamble (suppresses preamble).
PLIB_ETH_MIIMNoPreIsEnabled Gets the EMAC MIIM No Preamble enable status.
PLIB_ETH_MIIMReadDataGet Gets EMAC MIIM management read data after a MII read cycle has
completed.
PLIB_ETH_MIIMReadStart Initiates an MII management read command.
PLIB_ETH_MIIMResetDisable Disables EMAC Reset MII Management.
PLIB_ETH_MIIMResetEnable Enables EMAC Reset Media Independent Interface (MII)
Management.
PLIB_ETH_MIIMResetIsEnabled Gets the EMAC Reset MII Management enable status.
PLIB_ETH_MIIMScanIncrDisable Disables the EMAC MIIM Scan Increment.
PLIB_ETH_MIIMScanIncrEnable Enables EMAC MIIM Scan Increment.
PLIB_ETH_MIIMScanIncrIsEnabled Gets the EMAC MIIM scan increment enable status.
PLIB_ETH_MIIMScanModeDisable Disables MIIM scan mode.
PLIB_ETH_MIIMScanModeEnable Enables MIIM scan mode.
PLIB_ETH_MIIMScanModeIsEnabled Gets the MII management scan enable status.
PLIB_ETH_MIIMWriteDataSet Sets the EMAC MIIM write data before initiating an MII write cycle.
PLIB_ETH_MIIMWriteStart Initiates an MII management write command.
PLIB_ETH_MIIResetDisable Disables the EMAC Soft reset.
PLIB_ETH_MIIResetEnable Enables the EMAC MIIM Soft reset.
PLIB_ETH_MIIResetIsEnabled Gets EMAC MIIM Soft Reset enable status.
PLIB_ETH_MultipleCollisionCountClear Sets the value of the Ethernet multiple collision frame count to zero.
PLIB_ETH_MultipleCollisionCountGet Gets the count of the frames transmitted successfully after there
was more than one collision.
PLIB_ETH_NoBackoffDisable Disables EMAC no back-offs.
PLIB_ETH_NoBackoffEnable Enables EMAC no backoff.
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PLIB_ETH_NoBackoffIsEnabled Gets the EMAC no back-off enable status.
PLIB_ETH_NonBackToBackIPG1Get Gets the EMAC non-back-to-back interpacket gap register 1.
PLIB_ETH_NonBackToBackIPG1Set Sets the EMAC non-back-to-back interpacket gap register 1.
PLIB_ETH_NonBackToBackIPG2Get Gets the EMAC non-back-to-back interpacket gap register 2.
PLIB_ETH_NonBackToBackIPG2Set Sets the EMAC non-back-to-back interpacket gap register 2.
PLIB_ETH_PassAllDisable Disables the EMAC PassAll.
PLIB_ETH_PassAllEnable Enables the EMAC PassAll.
PLIB_ETH_PassAllIsEnabled Gets the EMAC PassAll enable status.
PLIB_ETH_PatternMatchChecksumGet Gets the value of the pattern match checksum register.
PLIB_ETH_PatternMatchChecksumSet Sets the Ethernet module pattern match checksum register with the
new value.
PLIB_ETH_PatternMatchGet Gets the value of the selected pattern match mask register.
PLIB_ETH_PatternMatchModeGet Gets the value of the selected pattern match mask register.
PLIB_ETH_PatternMatchModeSet Sets the Ethernet module pattern match mode.
PLIB_ETH_PatternMatchOffsetGet Gets the value of the patter match offset register.
PLIB_ETH_PatternMatchOffsetSet Sets the Ethernet module patter match offset register with the new
value.
PLIB_ETH_PatternMatchSet Sets the Ethernet module pattern match mask register with the new
value.
PLIB_ETH_PauseTimerGet Gets the Pause Timer value used for flow control.
PLIB_ETH_PauseTimerSet Sets the Pause Timer value used for flow control.
PLIB_ETH_PHYAddressGet Gets the EMAC MIIM management PHY address.
PLIB_ETH_PHYAddressSet Sets the EMAC MIIM PHY address.
PLIB_ETH_PurePreambleDisable Disables EMAC pure preamble enforcement.
PLIB_ETH_PurePreambleEnable Enables EMAC pure preamble enforcement.
PLIB_ETH_PurePreambleIsEnabled Gets EMAC pure preamble enforcement enable status.
PLIB_ETH_ReceiveBufferSizeGet Gets the Ethernet module receive buffer size.
PLIB_ETH_ReceiveBufferSizeSet Sets the Ethernet module receive buffer size.
PLIB_ETH_ReceiveDisable Disables the EMAC from receiving frames.
PLIB_ETH_ReceiveEnable Enables the EMAC to receive the frames.
PLIB_ETH_ReceiveFilterDisable Disables the specified receive filter.
PLIB_ETH_ReceiveFilterEnable Enables the specified receive filter.
PLIB_ETH_ReceiveFilterIsEnable Disables the specified receive filter.
PLIB_ETH_ReceiveIsBusy Gets the the Ethernet receive logic busy status.
PLIB_ETH_ReceiveIsEnabled Gets the Ethernet EMAC receive enable status.
PLIB_ETH_RegisterAddressGet Gets the EMAC MIIM management register address.
PLIB_ETH_RegisterAddressSet Sets EMAC MIIM register address.
PLIB_ETH_ReTxMaxGet Gets the EMAC maximum retransmissions.
PLIB_ETH_ReTxMaxSet Sets the EMAC maximum retransmissions.
PLIB_ETH_RMIIResetDisable Disables EMAC Reset RMII.
PLIB_ETH_RMIIResetEnable Enables EMAC Reset RMII.
PLIB_ETH_RMIIResetIsEnabled Gets the EMAC Reset RMII enable status.
PLIB_ETH_RMIISpeedGet Gets the current EMAC RMII speed.
PLIB_ETH_RMIISpeedSet Sets EMAC RMII Speed.
PLIB_ETH_RxBufferCountDecrement Causes the Receive Descriptor Buffer Counter to decrement by 1.
PLIB_ETH_RxDisable Disables the Ethernet module receive logic.
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PLIB_ETH_RxEmptyWmarkGet Gets the Ethernet module receive empty watermark.
PLIB_ETH_RxEmptyWmarkSet Sets the Ethernet module receive empty water mark.
PLIB_ETH_RxEnable Enables the Ethernet receive logic.
PLIB_ETH_RxFullWmarkGet Gets the Ethernet module receive full watermark.
PLIB_ETH_RxFullWmarkSet Sets the Ethernet module receive full water mark.
PLIB_ETH_RxFuncResetDisable Disables the EMAC reset receive funtion logic.
PLIB_ETH_RxFuncResetEnable Enables the EMAC reset receive funtion logic.
PLIB_ETH_RxFuncResetIsEnabled Gets the EMAC reset receive function status.
PLIB_ETH_RxIsEnabled Gets the Ethernet module receive enable status.
PLIB_ETH_RxOverflowCountClear Sets the value of the Ethernet receive overflow count to zero.
PLIB_ETH_RxOverflowCountGet Gets the count of the dropped Ethernet receive frames.
PLIB_ETH_RxPacketCountGet Gets the value of the receive packet buffer count.
PLIB_ETH_RxPacketDescAddrGet Gets the address of the next receive descriptor.
PLIB_ETH_RxPacketDescAddrSet Sets the Ethernet module receive packet descriptor start address.
PLIB_ETH_RxPauseDisable Disables the EMAC receive flow control.
PLIB_ETH_RxPauseEnable Enables the EMAC receive flow control.
PLIB_ETH_RxPauseIsEnabled Gets the EMAC receive flow pause enable status.
PLIB_ETH_ShortcutQuantaDisable Disables EMAC shortcut pause quanta.
PLIB_ETH_ShortcutQuantaEnable Enables EMAC shortcut pause quanta.
PLIB_ETH_ShortcutQuantaIsEnabled Gets EMAC shortcut pause quanta enable status.
PLIB_ETH_SimResetDisable Disables the EMAC simulation reset.
PLIB_ETH_SimResetEnable Enables the EMAC simulation reset.
PLIB_ETH_SimResetIsEnabled Gets the EMAC simulation reset status.
PLIB_ETH_SingleCollisionCountClear Sets the value of the Ethernet single collision frame count to zero.
PLIB_ETH_SingleCollisionCountGet Gets the count of the frames transmitted successfully on a second
attempt.
PLIB_ETH_StationAddressGet Gets the selected EMAC station address.
PLIB_ETH_StationAddressSet Sets the selected EMAC Station Address.
PLIB_ETH_StopInIdleDisable Ethernet module operation will continue when the device enters Idle
mode.
PLIB_ETH_StopInIdleEnable Ethernet module operation will stop when the device enters Idle
mode.
PLIB_ETH_StopInIdleIsEnabled Gets the Ethernet module Stop in Idle mode enable status.
PLIB_ETH_TestBackPressDisable Disables EMAC Test backpressure.
PLIB_ETH_TestBackPressEnable Enables EMAC Test backpressure.
PLIB_ETH_TestBackPressIsEnabled Gets the EMAC test backpressure enable status.
PLIB_ETH_TestPauseDisable Disables EMAC test pause.
PLIB_ETH_TestPauseEnable Enables EMAC test pause.
PLIB_ETH_TestPauseIsEnabled Gets the EMAC test pause enable status.
PLIB_ETH_TransmitIsBusy Gets the status value of the Ethernet transmit logic busy status
PLIB_ETH_TxFuncResetDisable Disables the EMAC Transmit function reset.
PLIB_ETH_TxFuncResetEnable Enables the EMAC transmit function reset.
PLIB_ETH_TxFuncResetIsEnabled Gets the EMAC Transmit function reset status.
PLIB_ETH_TxPacketDescAddrGet Gets the address of the next descriptor to be transmitted.
PLIB_ETH_TxPacketDescAddrSet Sets the Ethernet module transmit packet descriptor start address.
PLIB_ETH_TxPauseDisable Disables the transmission of Pause frames.
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PLIB_ETH_TxPauseEnable Enables the the tansmission Pause frames.
PLIB_ETH_TxPauseIsEnabled Gets the Ethernet module enable status.
PLIB_ETH_TxRTSDisable Aborts an Ethernet module transmission.
PLIB_ETH_TxRTSEnable Enables the Ethernet transmit request to send.
PLIB_ETH_TxRTSIsEnabled Gets the Ethernet module transmit request to send status.
Types
Name Description
ETH_PATTERN_MATCH_MODE Lists the possible pattern match values.
File Name
plib_eth.h
Company
Microchip Technology Inc.
5.6.9 I2C Peripheral Library
5.6.9.1 Introduction
This library provides a low-level abstraction of the Inter-Integrated Circuit (I2C) module on Microchip microcontrollers.
Description
I
2C Peripheral Library
for
Microchip Microcontrollers
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This library provides a low-level abstraction of the Inter-Integrated Circuit (I2C) module on Microchip microcontrollers with a
convenient C language interface. It can be used to simplify low-level access to the module without the necessity of interacting
directly with the module's registers, thus hiding differences from one microcontroller variant to another.
Please refer to the I2C-Bus Specification (v2.1), available from Philips Semiconductor (see the Note below) for complete details
on the operation and requirements for the I2C bus.
Note: Trademarks and Intellectual Property are property of their respective owners. Customers are responsible for obtaining
appropriate licensing or rights before using this software.
5.6.9.2 Release Notes
MPLAB Harmony Version: v0.70b I
2C Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.9.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
5.6 Peripheral Library Help MPLAB Harmony Help I2C Peripheral Library
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YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.9.4 How the Library Works
How the Library Works
Before enabling the I2C module the caller must initialize basic configuration, clock frequency, and Slave address recognition
features (see Initializing the I2C).
After the module has been enabled, it can begin monitoring the bus as a slave device waiting to be addressed by an external
master (see Operating as a Slave Receiver). A slave device only transfers data on the bus when it has been addressed by a
master (see Operating as a Slave Transmitter). If the module is used to start a transfer, then it is operating as a master. A master
addresses a slave and controls the transfer of data by providing the clock (see Operating as a Master Transmitter and Operating
as a Master Receiver).
Some operations in the I2C library initiate actions on the I2C bus that require time to complete. Also, some events occur
asynchronously on the bus. In each of these cases, the module causes either a "master", "slave", or "error" interrupt. Interrupt
State Machine describes the different states that can cause an interrupt and show what causes the transition from one state to
another. Handling Errors describes the various errors that can occur and how to deal with them.
Data transfers on the I2C bus must follow specific formats defined by the I2C bus protocol. (Refer to Forming Transfers for
details)
Note: The I2C peripheral library does not directly respond to interrupts. The client software (usually a driver, middleware layer, or
application) should implement the Interrupt Service Routine (ISR) and call the I2C library's interface routines from that ISR to
manage the state of the I2C module.
5.6.9.4.1 Initializing the I2C
To initialize the I2C module, perform the following sequence:
1. Select the desired general configuration options using General Initialization Functions to select the desired operation of the
following features:
• Slave Clock Stretching
• General Call Address Recognition
• System Management Bus (SMBus) Support
• High Frequency Operation
• Reserved Address Protection
• Stop-in-Idle Operation
2. Program the Baud Rate Generator to set the desired baud rate using the PLIB_I2C_BaudRateSet function.
3. If operating in slave mode, set the desired slave address using the PLIB_I2C_SlaveAddress7BitSet function (for 7-bit mode
operation) or PLIB_I2C_SlaveAddress10BitSet function (for 10-bit mode operation).
4. If running in an interrupt-driven environment, clear any pending interrupts and enable the appropriate (master, slave, and
error) I2C interrupts. Refer to the "Interrupt Controller" section in the related family reference manual section for information.
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5. Enable the module for operation using the PLIB_I2C_Enable function.
Example
#define MY_I2C_ID I2C_ID_1
uint32_t actualClock;
// Configure General I2C Options
PLIB_I2C_SlaveClockStretchingEnable(MY_I2C_ID);
PLIB_I2C_GeneralCallEnable(MY_I2C_ID);
PLIB_I2C_SMBDisable(MY_I2C_ID);
PLIB_I2C_HighFrequencyDisable(MY_I2C_ID);
PLIB_I2C_ReservedAddressProtectEnable(MY_I2C_ID);
PLIB_I2C_StopInIdleEnable(MY_I2C_ID);
// Set Desired baud rate
PLIB_I2C_BaudRateSet ( MY_I2C_ID, MY_PERIPHEAL_CLOCK_FREQ, MY_I2C_BAUD_RATE);
// Set the appropriate slave address (slave only)
PLIB_I2C_SlaveAddress7BitSet(MY_I2C_ID, MY_SLAVE_ADDRESS);
// Optional: Clear and enable interrupts before enabling the I2C module.
// Enable the module
PLIB_I2C_Enable(MY_I2C_ID);
Note: Refer to the "Interrupt Controller" section in the related family reference manual section for details on how to clear and
enable the I2C module interrupts.
The previous example uses the following constants:
Symbol Description
I2C_ID_1 Defined as the selected I2C module value from the I2C Module enumeration.
Example: #define MY_I2C_ID I2C_ID_1
MY_I2C_PERIPHERAL_CLOCK Defined as the peripheral clock frequency (in Hz) of the I2C module.
Example: #define MY_I2C_PERIPHERAL_CLOCK 80000000
MY_I2C_BAUD_RATE Defined as desired I2C baud rate. Example: #define MY_I2C_BAUD_RATE 100000
MY_SLAVE_ADDRESS Defined as the desired 7-bit I2C slave address.
Example #define 0x1A // Slave address 0011010 in binary
Note: If 0 is passed in as the mask value, the I2C module will only respond to single slave
address passed in the second parameter.
5.6.9.4.2 Operating as a Slave Receiver
Before enabling the module, the module's "local" slave address and mask should be programmed using the
PLIB_I2C_SlaveAddress7BitSet function or the PLIB_I2C_SlaveAddress10BitSet function, depending on the desired address
width. If slave address masking is supported on the chosen processor the "don't care bits" mask can be set using the
PLIB_I2C_SlaveMask7BitSet function or the PLIB_I2C_SlaveMask10BitSet function, also depending on the desired address
width. Once the I2C module has been enabled, it will begin waiting for an I2C master to address it. When the programmed local
slave address is recognized (ignoring any bits in the programmed mask value, if supported), the module will ACK the address
and notify software that it has received an address byte. If the R/W bit of the address is 0, the module enters receive mode
automatically. As additional bytes are received, the module will automatically ACK them if the previous byte has been read from
the RX buffer before the new byte has been completely received and notify software of the newly available byte. Both address
and data bytes received must be read from the RX buffer by software.
Preconditions
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1. The module must have had it's basic options and clock frequency initialized and have been enabled (see Initializing the I2C).
2. An external master must have started a transfer.
3. The address address of the transfer must have matched with the address (ignoring any bits in the mask) programmed into the
module by software.
Process
Software must follow this sequence:
1. Ensure that a byte has been received either by polling the PLIB_I2C_ReceivedByteIsAvailable function or by waiting for a
slave interrupt (at which time, this function should still be checked).
2. Identify if the byte is a data byte or an address byte using the PLIB_I2C_SlaveAddressIsDetected function.
3. If the byte is an address byte, software must identify if it is starting a read or write operation using the
PLIB_I2C_SlaveReadIsRequested function.
4. Software must read the byte from the RX buffer using the PLIB_I2C_ReceivedByteGet function, even if it was an address byte.
5. If clock stretching was enabled during initialization, then software must call the PLIB_I2C_SlaveClockRelease function to
release the SCL line.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t data;
if ( PLIB_I2C_ReceivedByteIsAvailable(MY_I2C_ID) )
{
// Check to see if the byte is data or an address
if (PLIB_I2C_SlaveAddressWasDetected(MY_I2C_ID))
{
if ( PLIB_I2C_SlaveReadWasRequested(MY_I2C_ID) )
{
// Beginning a slave receive sequence
}
else
{
// Beginning a slave transmit sequence
}
}
else
{
// Data Byte Received
}
// Read the data or address from the RX buffer
data = PLIB_I2C_ReceivedByteGet(MY_I2C_ID);
// Free the SCL line (only if clock stretching was enabled)
PLIB_I2C_SlaveClockRelease(MY_I2C_ID);
}
The above example uses the following constants and variables:
Symbol Description
MY_I2C_ID Defined as the selected I2C module value from the I2C Module enumeration. Example: #define MY_I2C_ID
I2C_ID_1
data This is the variable used to hold the byte received.
5.6.9.4.3 Operating as a Slave Transmitter
Once an an external master has addressed the the I2C module (see Operating as a Slave Receiver) with the read-write bit set
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(as determined by calling the PLIB_I2C_SlaveReadIsRequested function), software can begin transmitting data to the master.
Pre-Conditions
1. The module must have had it's basic options and clock frequency initialized and have been enabled(see Initializing the I2C)
2. An external master must have started a transfer.
3. The address address of the transfer must have matched with the address slave programmed into the I2C module (see
Managing Slave Addresses).
4. A slave read must have been requested (as described above).
Note: When the address has been received and matched the programmed local slave address, a slave interrupt will occur if it
has been enabled.
Transmitting a Byte
When operating as a slave transmitter on the I2C bus, the software must use the following sequence to transmit data bytes.
1. Ensure that the TX buffer is currently ready to accept a byte to be transmitted using the PLIB_I2C_TransmitterIsReady
function.
2. Write the byte to be transmitted to the TX buffer using the PLIB_I2C_TransmitterByteSend function.
3. If clock stretching was enabled (using the PLIB_I2C_SlaveClockStretchingEnable function) and the previous byte was ACKed,
the PLIB_I2C_SlaveClockRelease function must be called to release the SCL line (it is safe to call this even if the previous
byte was NAKed.)
Example
#define MY_I2C_ID I2C_ID_1
uint8_t data;
// Assign the desired byte value into the "data" variable
if (PLIB_I2C_TransmitterIsReady(MY_I2C_ID))
{
// Write the byte to the TX buffer
PLIB_I2C_TransmitterByteSend(MY_I2C_ID, data);
// Free the SCL line (only if clock stretching was enabled)
PLIB_I2C_SlaveClockRelease(MY_I2C_ID);
}
Checking Acknowledgement
After a byte has been transmitted, the module latches the ACK/NAK response from the master so that software may use the
following sequence to verify it and causes another slave interrupt (if it has been enabled).
1. Ensure that the byte has been completely transmitted using the PLIB_I2C_TransmitterByteHasCompleted function (and/or by
responding to the slave interrupt).
2. Determine if the byte was ACKed or NAKed using the PLIB_I2C_TransmitterByteWasAcknowledged function.
Example
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_TransmitterByteHasCompleted(MY_I2C_ID))
{
if (PLIB_I2C_TransmitterByteWasAcknowledged(MY_I2C_ID))
{
// Transmission successful
}
else
{
// Transmission was not successful
}
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}
The above examples use the following constants and variables:
Symbol Description
MY_I2C_ID Defined as the selected I2C module value from the I2C Module enumeration. Example: #define MY_I2C_ID
I2C_ID_1
data This is the buffer containing byte of data to transmit.
5.6.9.4.4 Operating as a Master Transmitter
Whenever the I2C module initiates a transfer on the bus, it is acting as master. A transfer can be initiated any time the bus is idle.
If two masters attempt to initiate transfers at nearly the same time, one of them will lose arbitration at some point during the
transfer and must retry the transfer later when the bus becomes idle. The winner of arbitration can continue, without any data
loss.
An I2C bus transfer always begins with a Start condition, followed by one or two properly formatted bytes containing the 7-bit or
10-bit target slave address (address of the slave device that is the target of the transfer). The direction of the remainder of
transfers (after the address has been sent) is indicated by bit 0 of the address (0 = write/transmitting, 1 = read/receiving, from the
point of view of the master). After that, any amount of data may be transferred and a repeated Start condition (followed by
another properly formatted address) can occur to change the direction of the transfer or even the target slave device. See
Forming Transfers for details of the possible transfer formats. When the master is finished, an I2C bus transfer always ends with
a Stop condition. These steps are summarized below.
Summary of Steps
1. Send a Start condition.
2. Send a 7-bit or 10-bit address (one or two bytes with a write transfer indication in bit 0).
3. Send data bytes.
4. Send a Stop condition.
Each of these steps making up a transfer will take some time to complete. The completion of each step will cause an I2C master
interrupt. The software must always keep track of which state it was in, check the I2C status, and respond to the interrupt by
performing the next appropriate step.
Note 1: Arbitration loss can occur after each step has completed. Software should check for arbitration loss by calling the
PLIB_I2C_ArbitrationLossHasOccurred function. If arbitration loss occurs, it must be cleared by calling the
PLIB_I2C_ArbitrationLossClear function.
Note 2: After any step completes, but before sending the Stop condition (see step 4), the master may send a repeated Start
condition and start over at step 2 to change slave targets and/or transfer direction.
Sending a Start Condition
To start a master transfer, the software must do the following:
Preconditions
The module must have had its basic options and clock frequency initialized and have been enabled (see Initializing the I2C).
Process
1. Verify that the bus is idle using the PLIB_I2C_BusIsIdle function.
2. Send the start signal using the PLIB_I2C_MasterStart function.
3. Check for arbitration loss after the start condition has completed using the PLIB_I2C_ArbitrationLossHasOccurred function.
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Example: Sending a Start Condition
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_BusIsIdle(MY_I2C_ID))
{
PLIB_I2C_MasterStart(MY_I2C_ID);
}
The Start condition must be allowed to complete before any additional steps can be taken. The only way to determine this is to
wait for a master interrupt to occur after the Start condition has been initiated. Even if the bus is verified to be idle before sending
the start condition, a bus collision can still occur while the Start condition is being transmitted. To verify that arbitration has not
been lost during transmission of the Start condition, the software should check the PLIB_I2C_ArbitrationLossHasOccurred
function after the Start condition has completed.
Example: Checking for Arbitration Loss
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_ArbitrationLossHasOccurred(MY_I2C_ID))
{
// Abort transfer, retry later
PLIB_I2C_ArbitrationLossClear(MY_I2C_ID);
}
Sending a 7-bit Address
To send a 7-bit address, the software must do the following:
Preconditions
The Start condition must have been sent and completed as previously described.
Process
1. Ensure that the TX buffer is currently ready to accept a byte to be transmitted using the PLIB_I2C_TransmitterIsReady
function.
2. Format the address byte correctly with the 7-bit address and the read/write bit appropriately set (for a read transfer) or cleared
(for a write transfer). This can be done easily using the PLIB_I2C_ADDRESS_7_BIT_FORMAT macro and the I2C_READ or
I2C_WRITE constants.
3. Write the address byte to the TX buffer using the PLIB_I2C_TransmitterByteSend function (the address byte can be easily
accessed using the PLIB_I2C_ADDRESS_7_BIT_BYTE_ACCESS macro)
Note: A master interrupt will occur once the address byte has been transmitted and ACKed or NAKed by the targeted slave
device. (If the slave device doesn't answer, an implicit NAK will occur.)
4. Once the address byte has been ACKed or NAKed by the slave target, software must verify the result and respond
appropriately. The Acknowledgement and Arbitration process is described in a subsequent section, just before the description
of how to send a Stop condition.)
Example: Sending a 7-bit Address
#define MY_I2C_ID I2C_ID_1
#deifne SLAVE_TARGET_7BIT_ADDRESS 23
I2C_7_BIT_ADDRESS slaveTargetAddress7Bit;
// Format the 7-bit address byte with the read or write indication in bit 0
I2C_ADDRESS_7_BIT_FORMAT(slaveTargetAddress7Bit, SLAVE_TARGET_7BIT_ADDRESS,
I2C_WRITE);
// Send the address byte
if (PLIB_I2C_TransmitterIsReady(MY_I2C_ID))
{
PLIB_I2C_TransmitterByteSend(MY_I2C_ID,
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I2C_ADDRESS_7_BIT_BYTE_ACCESS(slaveTargetAddress7Bit));
}
Note: Bits 7-1 contain the 7-bit target slave address. Bit 0 indicates read or write direction for the remainder of the transfer.
Sending a 10-bit Target Slave Address
To send a 10-bit address, the software must do the following:
Preconditions
The Start condition must have been sent and completed as previously described.
Process
1. Format the two address bytes correctly with the 10-bit address and the read/write bit appropriately set (for a read transfer) or
cleared (for a write transfer). This can be done using the I2C_ADDRESS_10_BIT_FORMAT macro and the I2C_READ or
I2C_WRITE constants.
2. Ensure that the TX buffer is currently ready to accept a byte to be transmitted using the PLIB_I2C_TransmitterIsReady
function.
3. Write the first address byte to the TX buffer using the PLIB_I2C_TransmitterByteSend function (the first address byte can be
easily accessed using the PLIB_I2C_ADDRESS_10_BIT_1ST_BYTE_ACCESS macro)
Note: After the first byte has been sent and ACKed or NAKed by the slave, a master interrupt will occur (or you can poll the
PLIB_I2C_TransmitterByteHasCompleted function).
4. Ensure that the first address byte was ACKed by the slave target (to do this, follow the Acknowledgement process described
further below)
5. Write the second address byte to the TX buffer using the PLIB_I2C_TransmitterIsReady function and the
PLIB_I2C_TransmitterByteSend function (the second address byte can be easily accessed using the
PLIB_I2C_ADDRESS_10_BIT_2ND_BYTE_ACCESS macro).
Note: After the second byte has been sent and ACKed or NAKed by the slave, a master interrupt will occur (or you can poll the
PLIB_I2C_TransmitterByteHasCompleted function).
6. Ensure that the second address byte was ACKed by the slave target (to do this, follow the process in the Acknowledgement
and Arbitration, which is described later in this section).
Example: Formatting the 10-bit Address in Two Bytes
#define MY_I2C_ID I2C_ID_1
#define SLAVE_TARGET_10BIT_ADDRESS 0x23
I2C_10_BIT_ADDRESS slaveAddress10Bit;
I2C_ADDRESS_10_BIT_FORMAT(slaveAddress10Bit, SLAVE_TARGET_10BIT_ADDRESS, I2C_WRITE);
Note: The slaveAddress10Bit variable is used in the following two examples.
Example: Sending the First Byte of a 10-bit Address
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_TransmitterIsReady(MY_I2C_ID))
{
PLIB_I2C_TransmitterByteSend(MY_I2C_ID,
I2C_ADDRESS_10_BIT_1ST_BYTE_ACCESS(slaveAddress10Bit));
}
Wait for transmission to complete and check for acknowledgement and/or arbitration loss.
Example: Sending the Second Byte of a 10-bit Address
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_TransmitterIsReady(MY_I2C_ID))
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{
PLIB_I2C_TransmitterByteSend(MY_I2C_ID,
I2C_ADDRESS_10_BIT_2ND_BYTE_ACCESS(slaveAddress10Bit));
}
Wait for transmission to complete and check for acknowledgement and/or arbitration loss.
Sending a Data Byte
The following sequence can be used to send a data byte and repeated to send an arbitrary number of data bytes.
Preconditions
• The Start condition must have been sent and completed as previously described
• The target slave address has been fully transmitted (with the write indication in bit 0) and ACKed by the targeted slave device
Process
1. Ensure that the TX buffer is currently ready to accept a byte to be transmitted using the PLIB_I2C_TransmitterIsReady
Function.
2. Write the byte to be transmitted to the TX buffer using the PLIB_I2C_TransmitterByteSend Function.
Note: After the byte has been sent and ACKed or NAKed by the slave, a master interrupt will occur (or poll the
PLIB_I2C_TransmitterByteHasCompleted function).
3. Check for arbitration loss or an ACK or NAK from the slave as described in the next section, Acknowledgement and
Arbitration.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t data;
// Assign the data value into the "data" variable
if (PLIB_I2C_TransmitterIsReady(MY_I2C_ID))
{
PLIB_I2C_TransmitterByteSend(MY_I2C_ID, data);
}
Wait for transmission to complete and check for acknowledgement and/or arbitration loss.
Acknowledgement and Arbitration
After sending a data or address byte (as described above), the master transmitter must check to see if arbitration was lost and if
the byte was ACK'd or NAK'd. If the byte was ACK'd, the slave receiver is ready to receive more bytes. If the byte was NAKed,
the slave receiver cannot accept any more bytes at this time.
Preconditions
• The start condition must have been sent and completed as previously described
• A byte (address or data) must have been transmitted, using one of the the previous processes
Process
1. Ensure that the byte has been completely transmitted using the PLIB_I2C_TransmitterByteHasCompleted function (and/or by
waiting for the master interrupt)
2. Determine if arbitration loss has occurred using the PLIB_I2C_ArbitrationLossHasOccurred function.
3. Determine if the byte was ACKed or NAKed using the PLIB_I2C_TransmitterByteWasAcknowledged function.
Example
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_TransmitterByteHasCompleted(MY_I2C_ID))
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{
if (PLIB_I2C_ArbitrationLossHasOccurred(MY_I2C_ID))
{
// Handle arbitration loss
PLIB_I2C_ArbitrationLossClear(MY_I2C_ID);
}
else
{
if (PLIB_I2C_TransmitterByteWasAcknowledged(MY_I2C_ID))
{
// Transmission successful
}
else
{
// Transmission was not successful
}
}
}
To handle arbitration loss, the master transmitter must stop the transfer process and retry the entire transfer again at a later time
when the bus is not busy.
Sending a Repeated Start Condition
If the master wants to change slave targets or transfer directions, it can send a repeated Start condition followed by a new
address at any time after the previous target slave address has been acknowledged (and before the Stop condition has been
sent).
Preconditions
• The Start condition must have been sent and completed as previously described
• A target slave address must have been transmitted and ACKed
• Zero or more data bytes may also have been sent and ACKed
Process
Send the repeated Start condition using the PLIB_I2C_MasterStartRepeat function.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_MasterStartRepeat(MY_I2C_ID);
The Start condition must be allowed to complete before any additional steps can be taken. The only way to determine this is to
wait for a master interrupt to occur after the Start condition has been initiated.
The repeated Start must be followed by another target slave address (either 7-bit or 10-bit, as appropriate).
Sending a Stop Condition
When the master transmitter has finished sending data, it must end the transfer with a stop condition.
Preonditions
• The Start condition must have been sent and completed as previously described
• A target slave address must have been transmitted and ACKed
• Zero or more data bytes may also have been sent and ACKed
Note: At least one address byte must be transmitted between the Start and Stop conditions. Following a Start condition
immediately with a Stop condition is a protocol error and can cause some slave devices to lock up and stop responding to the
bus.
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Process
Send a stop condition using the PLIB_I2C_MasterStop function.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_MasterStop(MY_I2C_ID);
The Stop condition must be allowed to complete before any additional steps can be taken. The only way to determine this is to
wait for a master interrupt to occur after the Stop condition has been initiated.
After a Stop condition, the bus should be idle unless a master immediately starts a new transfer. Strictly speaking, a bus collision
can still occur while the Stop condition is being transmitted. Although the transfer is already completed when the Stop condition
has been sent, software does not have to abort the transfer; however, it should still check for and clear the arbitration loss
condition if it occurs.
Example: Checking for Arbitration Loss
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_ArbitrationLossHasOccurred(MY_I2C_ID))
{
PLIB_I2C_ArbitrationLossClear(MY_I2C_ID);
}
The previous examples use the following constants and variables:
Symbol Description
MY_I2C_ID Defined as the selected I2C module value from the I2C Module enumeration. Example:
#define MY_I2C_ID I2C_ID_1
data This is the buffer containing byte of data to transmit.
slaveTargetAddress7Bit This variable is used to demonstrate how to properly format and access a 7-bit target slave
address
SLAVE_TARGET_7BIT_ADDRESS This constant is used as a placeholder for the actual 7-bit target slave address that must
be defined by the client code.
slaveAddress10Bit This variable is used to demonstrate how to properly format and access a 10-bit slave
address.
SLAVE_TARGET_10BIT_ADDRESS This constant is used as a placeholder for the actual 10-bit slave address that must be
defined by the client code.
5.6.9.4.5 Operating as a Master Receiver
Any time the I2C module initiates a transfer on the bus, it is acting as a master. A transfer can be initiated any time the bus is
idle. If two masters attempt to initiate transfers at nearly the same time, one of them will lose arbitration and must retry the
transfer later when the bus becomes idle. The winner of arbitration can continue, without any data loss.
An I2C bus transfer always begins with a Start condition, followed by a 7-bit or 10-bit (1-byte or 2-byte) target slave address.
Therefore, every master transfer starts off transmitting at least one byte. The direction of transfer of subsequent bytes (after the
first byte has been sent) is indicated by bit 0 of the first address byte (0 = write/transmitting, 1 = read/receiving, from the point of
view of the master). If 10-bit addressing is used or additional data (such as an internal address) is to be transmitted after the first
address byte, the first address byte must indicate a write transfer. To change the direction after transmitting more than just a
single address byte, a repeated Start condition (followed by another single address byte) must be sent (see Forming Transfers
for details of the possible transfer formats). When the master is finished, an I2C bus transfer always ends with a Stop condition.
This results in two basic formats for receiving data as a master, as summarized below.
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Summary of Steps: Read Only
1. Send a Start condition.
2. Send a 7-bit address with a read transfer indication in bit 0.
3. Receive data bytes.
4. Send a Stop condition.
Summary of Steps: Combined Read-Write
1. Send a Start condition.
2. Send a 7-bit address (or the first byte of a 10-bit address) with a write transfer indication in bit 0.
3. Send the second byte of a 10-bit address (and/or any additional data to be transmitted).
4. Send a repeated Start condition.
5. Resend the first byte of the 10-bit address (or a 7-bit address) with a read indication in bit 0.
6. Receive data bytes.
7. Send a Stop condition.
Each of these steps making up a transfer will take some time to complete. The completion of each step will cause an I2C master
interrupt. The software must always keep track of which state it was in and respond to the interrupt by performing the next
appropriate step.
Sending a Start Condition
To start a master transfer, the software must do the following:
Preconditions
The module must have had its basic options and clock frequency initialized and have been enabled (see Initializing the I2C).
Process
1. Verify that the bus is idle using the PLIB_I2C_BusIsIdle function.
2. Send the start signal using the PLIB_I2C_MasterStart function.
Example
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_BusIsIdle(MY_I2C_ID))
{
PLIB_I2C_MasterStart(MY_I2C_ID);
}
The Start condition must be allowed to complete before any additional steps can be taken. The only way to determine this is to
wait for a master interrupt to occur after the Start condition has been initiated. Even if the bus is verified to be idle before sending
the Start condition, a bus collision can still occur while the Start condition is being transmitted. To verify that arbitration has not
been lost during transmission of the Start condition, the software should check the PLIB_I2C_ArbitrationLossHasOccurred
function after the Start condition has completed.
Example: Checking for Arbitration Loss
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_ArbitrationLossHasOccurred(MY_I2C_ID))
{
// Abort transfer, retry later
PLIB_I2C_ArbitrationLossClear(MY_I2C_ID);
}
Sending a 7-bit Address
To send a 7-bit address (or the first byte of a 10-bit address), the software must do the following:
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Preconditions
The Start condition must have been sent and completed as previously described.
Process
1. Ensure that the TX buffer is currently ready to accept a byte to be transmitted using the PLIB_I2C_TransmitterIsReady
function.
2. Format the address byte correctly with the 7-bit address and the read/write bit appropriately set (for a read transfer) or cleared
(for a write transfer). This can be done easily using the PLIB_I2C_ADDRESS_7_BIT_FORMAT macro. and the I2C_READ or
I2C_WRITE constants.
3. Write the address byte to the TX buffer using the PLIB_I2C_TransmitterByteSend function (the address byte can be easily
accessed using theI2C_ADDRESS_7_BIT_BYTE_ACCESS macro).
Note: A master interrupt will occur once the address byte has been transmitted and ACKed or NAKed by the targeted slave
device (or if arbitration was lost). If the slave device does not answer, an implicit NAK will occur.
4. Once the address byte has been ACKed or NAKed by the slave target (or if arbitration was lost), software must verify the
result and respond appropriately. The Acknowledgement and Arbitration process is described in a subsequent section, just
before the description of how to send a Stop condition.)
Example: Sending a 7-bit Address
#define MY_I2C_ID I2C_ID_1
I2C_7_BIT_ADDRESS slaveTargetAddress7Bit;
// Format the 7-bit address byte with the read or write indication in bit 0
I2C_ADDRESS_7_BIT_FORMAT(slaveTargetAddress7Bit, SLAVE_TARGET_7BIT_ADDRESS, I2C_WRITE);
// Send the address byte
if (PLIB_I2C_TransmitterIsReady(MY_I2C_ID))
{
PLIB_I2C_TransmitterByteSend(MY_I2C_ID,
I2C_ADDRESS_7_BIT_BYTE_ACCESS(slaveTargetAddress7Bit));
}
Note: Bits 7-1 contain the 7-bit target slave address. Bit 0 indicates read or write direction for the remainder of the transfer.
Sending a 10-bit Target Slave Address
To send a 10-bit address, the software must do the following:
Preconditions
The Start condition must have been sent and completed as previously described.
Process
1. Format the two address bytes correctly with the 10-bit address and the read/write bit cleared, indicating a write transfer. This
can be done easily using the PLIB_I2C_ADDRESS_10_BIT_FORMAT macro and the I2C_WRITE constant.
2. Ensure that the TX buffer is currently ready to accept a byte to be transmitted using the PLIB_I2C_TransmitterIsReady
function.
3. Write the first address byte to the TX buffer using the PLIB_I2C_TransmitterByteSend function (the first address byte can be
easily accessed using the I2C_ADDRESS_10_BIT_1ST_BYTE_ACCESS Macro)
Note: After the first byte has been sent and ACKed or NAKed by the slave, a master interrupt will occur (or poll the
PLIB_I2C_TransmitterByteHasCompleted function).
4. Ensure that the first address byte was ACKed by the slave target and check for arbitration loss. To do this, use the
Acknowledgement and Arbitration process, which described in the next section.
5. Write the second address byte to the TX buffer using the PLIB_I2C_TransmitterIsReady function and the
PLIB_I2C_TransmitterByteSend function (the second address byte can be easily accessed using the
I2C_ADDRESS_10_BIT_2ND_BYTE_ACCESS macro).
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Note: After the second byte has been sent and ACKed or NAKed by the slave, a master interrupt will occur (or you can poll the
PLIB_I2C_TransmitterByteHasCompleted function).
6. Ensure that the second address byte was ACKed by the slave target and that arbitration was not lost. To do this, use the
Acknowledgement and Arbitration process, which described in the next section.
Example: Formatting the 10-bit Address in Two Bytes
#define MY_I2C_ID I2C_ID_1
#define SLAVE_TARGET_10BIT_ADDRESS 0x23
I2C_10_BIT_ADDRESS slaveAddress10Bit;
I2C_ADDRESS_10_BIT_FORMAT(slaveAddress10Bit, SLAVE_TARGET_10BIT_ADDRESS, I2C_WRITE);
Note: The slaveAddress10Bit variable is used in the following two examples.
Example: Sending the First Byte of a 10-bit Address
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_TransmitterIsReady(MY_I2C_ID))
{
PLIB_I2C_TransmitterByteSend(MY_I2C_ID,
I2C_ADDRESS_10_BIT_1ST_BYTE_ACCESS(slaveAddress10Bit));
}
Wait for transmission to complete and check for acknowledgement and/or arbitration loss.
Example: Sending the Second Byte of a 10-bit Address
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_TransmitterIsReady(MY_I2C_ID))
{
PLIB_I2C_TransmitterByteSend(MY_I2C_ID,
I2C_ADDRESS_10_BIT_2ND_BYTE_ACCESS(slaveAddress10Bit));
}
Wait for transmission to complete and check for acknowledgement and/or arbitration loss.
Acknowledgement and Arbitration
After sending a data or address byte (as described above), the master transmitter must check to see if arbitration was lost and if
the byte was ACKed or NAKed. If the byte was ACKed, the slave receiver is ready to receive more bytes. If the byte was NAKed,
the slave receiver cannot accept any more bytes at this time.
Preconditions
• The Start condition must have been sent and completed as previously described
• A byte (address or data) must have been transmitted, using one of the the previous processes
Process
1. Ensure that the byte has been completely transmitted using the PLIB_I2C_TransmitterByteHasCompleted function (and/or by
waiting for the master interrupt).
2. Determine if arbitration loss has occurred using the PLIB_I2C_ArbitrationLossHasOccurred function.
3. Determine if the byte was ACKed or NAKed using the PLIB_I2C_TransmitterByteWasAcknowledged function.
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_TransmitterByteHasCompleted(MY_I2C_ID))
{
if (PLIB_I2C_ArbitrationLossHasOccurred(MY_I2C_ID))
{
// Handle arbitration loss
PLIB_I2C_ArbitrationLossClear(MY_I2C_ID);
}
else
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{
if (PLIB_I2C_TransmitterByteWasAcknowledged(MY_I2C_ID))
{
// Transmission successful
}
else
{
// Transmission was not successful
}
}
}
To handle arbitration loss, the master must stop the transfer process and retry the entire transfer again at a later time when the
bus is not busy.
Sending a Repeated Start Condition
If the master wants to change slave targets or transfer directions, it must send a repeated Start condition followed by a new
address at any time after the previous target slave address has been acknowledged (and before the Stop condition has been
sent).
Preconditions
• The Start condition must have been sent and completed as previously described
• A target slave address must have been transmitted and ACKed.
• Zero or more data bytes may also have been sent or received and ACKed as appropriate.
Process
Send the repeated Start condition using the PLIB_I2C_MasterStartRepeat function.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_MasterStartRepeat(MY_I2C_ID);
The repeated Start condition must be allowed to complete before any additional steps can be taken. The only way to determine
this is to wait for a master interrupt to occur after the Start condition has been initiated. It must then be followed by another target
slave address (either 7-bit or 10-bit, as appropriate). Strictly speaking, a bus collision can still occur while the repeated start
condition is being transmitted. To verify that arbitration has not been lost during transmission of the repeated Start condition, the
software should check the PLIB_I2C_ArbitrationLossHasOccurred function after the repeated Start condition has completed.
Example: Checking for Arbitration Loss
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_ArbitrationLossHasOccurred(MY_I2C_ID))
{
// Abort transfer, retry later
PLIB_I2C_ArbitrationLossClear(MY_I2C_ID);
}
Receiving a Data Byte
The following sequence can be used to receive a data byte and repeated to receive an arbitrary number of data bytes.
Preconditions
• The Start condition must have been sent and completed as previously described
• The target slave address must have been fully transmitted (with the read indication in bit 0) and ACKed by the targeted slave
device
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Process
1. Start the I2C module cycling the clock line to receive one byte by calling the PLIB_I2C_MasterReceiverClock1Byte function.
The I2C module will generate a master interrupt once the eighth clock cycle has completed, but before the ninth cycle has
started.
2. Ensure that a byte was received and is available in the RX buffer using the PLIB_I2C_ReceivedByteIsAvailable function.
3. If a byte is available, get it from the RX buffer using the PLIB_I2C_ReceivedByteGet function.
4. ACK or NAK the byte (as determined by software) using the PLIB_I2C_ReceivedByteAcknowledge function. The master
receiver indicates to the slave transmitter that it wishes to terminate the transfer by NAKing the last byte. All other bytes
should be ACKed after reception.
5. Ensure that the ACK/NAK signal has completed using the PLIB_I2C_ReceiverByteAcknowledgeHasCompleted function or by
waiting for the master interrupt
Note: Arbitration loss cannot occur during a master reception (only during transmission).
Example: Enabling the Receiver
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_MasterReceiverClock1Byte(MY_I2C_ID);
Wait for reception to complete before attempting to get the byte from the receiver.
Example: Reading a Byte from the RX Buffer
#define MY_I2C_ID I2C_ID_1
#define MY_MAX_COUNT 10
uint8_t data;
int count;
if ( PLIB_I2C_ReceivedByteIsAvailable(MY_I2C_ID) )
{
data = PLIB_I2C_ReceivedByteGet(MY_I2C_ID);
count++;
// Determine if the data should be ACK'd or NAK'd
if (count < MY_MAX_COUNT)
{
PLIB_I2C_ReceivedByteAcknowledge(MY_I2C_ID, true);
}
else
{
PLIB_I2C_ReceivedByteAcknowledge(MY_I2C_ID, false);
}
}
Wait for the ACK/NAK to complete by waiting for the next master interrupt.
Example: Verifying ACK/NAK Signal is Complete
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_ReceiverByteAcknowledgeHasCompleted(MY_I2C_ID))
{
// Byte reception sequence complete
}
Sending a Stop Condition
When the master transmitter has finished sending data, it must end the transfer with a Stop condition.
Preconditions
• The Start condition must have been sent and completed as previously described
• A target slave address must have been transmitted and ACKed.
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• Zero or more data bytes may also have been sent or received and ACKed as appropriate
Note: At least one address byte must be transmitted between the Start and Stop conditions. Following a Start condition
immediately with a Stop condition is a protocol error and can cause some slave devices to lock up and stop responding to the
bus.
Process
Send a Stop condition using the PLIB_I2C_MasterStop function.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_MasterStop(MY_I2C_ID);
The Stop condition must be allowed to complete before any additional steps can be taken. The only way to determine this is to
wait for a master interrupt to occur after the Stop condition has been initiated.
After a Stop condition, the bus should be idle unless a master immediately starts a new transfer. Strictly speaking, a bus collision
can still occur while the stop condition is being transmitted. Although the transfer is already completed when the Stop condition
has been sent, software does not have to abort the transfer; however, it should still check for and clear the arbitration loss
condition if it occurs.
Example: Checking for Arbitration Loss
#define MY_I2C_ID I2C_ID_1
if (PLIB_I2C_ArbitrationLossHasOccurred(MY_I2C_ID))
{
PLIB_I2C_ArbitrationLossClear(MY_I2C_ID);
}
The previous example uses the following constants and variables:
Symbol Description
MY_I2C_ID Defined as the selected I2C module value from the I2C Module enumeration. Example:
#define MY_I2C_ID I2C_ID_1
data This is the buffer to hold byte of data received.
slaveTargetAddress7Bit This variable is used to demonstrate how to properly format and access a 7-bit target slave
address
SLAVE_TARGET_7BIT_ADDRESS This constant is used as a place holder for the actual 7-bit target slave address that must
be defined by the client code.
slaveAddress10Bit This variable is used to demonstrate how to properly format and access a 10-bit target
slave address
SLAVE_TARGET_10BIT_ADDRESS This constant is used as a place holder for the actual 10-bit target slave address that must
be defined by the client code.
5.6.9.4.6 Interrupt State Machine
The I2C state machine can be used in either a polled or an interrupt-driven manner. However, even when polled, software must
check the state of the master, slave, and error interrupt flags to identify when a state transition occurs.
The I2C module can cause three different interrupts:
• Slave Interrupt - A byte was sent or received in Slave mode
• Master Interrupt - A bus action has completed in Master mode
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• Error Interrupt - An error has occurred in any mode (see Handling Errors)
Note: Refer to the "Interrupt Controller" section in the related family reference manual for directions on how to enable, detect,
and respond to interrupts.
The I2C module will not start generating interrupts (setting the I2C interrupt flags, even if interrupts are disabled) until it is
properly configured and enabled. After that, interrupts are generated as described below. Software has to respond appropriately
once the interrupt has occurred (the flag has been set) to allow the state machine to advance to the next state. These actions are
described below the state machine diagram to which they refer.
Notes:
1. These state machine diagrams show the normal operations. Error and exception cases are explained in the Handling Errors
section and are not shown in the diagrams.
2. The transition labels sometimes represent hardware interrupts (or the setting of an interrupt flag) and sometimes represent
software actions. Refer to the transition tables to understand the transitions.
3. The Wait state is shared between all state machines (i.e., while in the Wait state, the I2C module can start a new
master-mode transfer or be addressed by an external master).
4. The Start state is shared between both read and write master transfer state machines (i.e., when starting a new transfer,
software can choose start either a read or a write transfer).
Slave Mode State Machine
Slave Mode State Transitions
In Slave mode, state transitions occur under hardware control automatically or in response to an interrupt. Software must
respond appropriately to ensure that the module continues to operate correctly.
Transition From
State
To State Software Actions
Enable Initialize Wait Enable the module, using the PLIB_I2C_Enable function
Slave
Interrupt,
7-bit
Address
Match,
Write
Wait Receive
mode
Software should call the PLIB_I2C_ReceivedByteIsAvailable function to verify that a byte has
been received and the PLIB_I2C_SlaveAddressWasDetected function to verify that a 7-bit
address (or the first byte of a 10-bit address) has been received. Then, software must get the
address byte from the receiver buffer (the byte is automatically ACKed), using the
PLIB_I2C_ReceivedByteGet function. Software must also release the clock by calling
PLIB_I2C_SlaveClockRelease function to allow reception of the next byte.
Note: This transition occurs on a write transfer with either a 7-bit or 10-bit address (for the
first of two address bytes).
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Slave
Interrupt,
Byte
Received
Receive
mode
Receive
mode
Software should call the PLIB_I2C_ReceivedByteIsAvailable function to verify that a byte has
been received and, if one has, get the byte from the receiver buffer by calling
PLIB_I2C_ReceivedByteGet function. Then, software must release the clock by calling
PLIB_I2C_SlaveClockRelease function to allow reception of the next byte.
Slave
Interrupt,
10-bit
Address
Match
Receive
mode
Receive
mode
Software should call the PLIB_I2C_ReceivedByteIsAvailable function to verify that a byte has
been received and (if 10-bit addressing is being used) call the
PLIB_I2C_SlaveAddress10BitWasDetected function to verify that the second byte of the
10-bit address matched the low-order 8-bits of the local-slave 10-bit address. Next, software
must get the address byte received from the receiver buffer (the byte is automatically
ACKed), using the PLIB_I2C_ReceivedByteGet function.
Note: This transition occurs on write transfer when using 10-bit (2-byte) addressing when the
second address byte is received.
End
Receive
Receive
mode
Wait None. Software is not aware of this transition.
A receive transfer can end with a stop condition, a repeated start, or if the second-half of a
10-bit slave address does not match the programmed local slave address (and possibly the
optional mask).
Slave
Interrupt,
7-bit
Address
Match,
Read
Wait Transmit
mode
Software should call the PLIB_I2C_ReceivedByteIsAvailable function to verify that a byte has
been received and the PLIB_I2C_SlaveAddressWasDetected function to verify that an
address has been received. Then, software must get the address byte from the receiver
buffer (the byte is automatically ACKed), using the PLIB_I2C_ReceivedByteGet function.
Notes: This transition occurs on a read transfer with a 7-bit (1-byte) address or after a
repeated-start with a 10-bit slave address.
The second byte of a 10-bit address is not sent after a repeated-start condition, only the first
byte. The 10-bit slave device must remember if it was addressed at the beginning of this
transfer.
After handling the address byte received, software should call the
PLIB_I2C_TransmitterIsReady function to make sure that the transmitter buffer is able to
accept a byte and, if it is, call the PLIB_I2C_TransmitterByteSend function to send the
requested byte.
Slave
Interrupt,
Byte
Completed
Transmit
mode
Transmit
mode
Software must call the PLIB_I2C_TransmitterByteWasAcknowledged function to check to see
if the byte was ACKed or NAKed. If the byte was ACKed, software must send the next byte
by calling the PLIB_I2C_TransmitterIsReady function to make sure that the transmitter buffer
is able to accept a byte and, if it is, call the PLIB_I2C_TransmitterByteSend function to send
the next byte.
NAK Transmit
mode
Wait Software must call the PLIB_I2C_TransmitterByteWasAcknowledged function to check to see
if the byte was ACKed or NAKed. The master will NAK the last byte it wishes to receive. At
that point, the transfer is effectively over and software must not attempt to send any more
bytes. The module automatically transitions back to the Wait state when the Stop condition
occurs, but software does not receive an interrupt at that point.
Master Mode Write Transfer State Machine
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Master-Mode Write-Transfer State Transitions
Transition From
State
To State Software Actions
Begin
Master
Transfer
Wait Start This state transition occurs when software initiates transmission of the start condition.
Software should call the PLIB_I2C_BusIsIdle function to verify that the bus is not currently in
use by another master. Then it must call the PLIB_I2C_MasterStart function (or
PLIB_I2C_MasterStartRepeat function) to send the start (or repeated start) condition.
Master
Interrupt,
Start
Completed
Start 7-Bit
Address,
Write
After the start condition has completed, software should check for a possible collision by
calling the PLIB_I2C_ArbitrationLossHasOccurred function. Then, it must send an
appropriately formatted 7-bit address byte (or the first byte of the 10-bit address) to the I2C
bus to address a slave target. To do this, it should first call the
PLIB_I2C_TransmitterIsReady function to verify that the transmitter buffer is ready to accept
a byte and then call the PLIB_I2C_TransmitterByteSend function to send the byte.
Master
Interrupt,
Byte
Completed
7-bit
Address,
Write
Transmit When the master interrupt occurs (or the PLIB_I2C_TransmitterByteHasCompleted function
returns true) to indicate that the last byte sent has completed, software must check to ensure
that the slave device ACKed the byte by calling the
PLIB_I2C_TransmitterByteWasAcknowledged function. Software should also call the
PLIB_I2C_ArbitrationLossHasOccurred function to determine if a collision occurred. If all is
well, software may then send another byte to the slave using the
PLIB_I2C_TransmitterIsReady function and the PLIB_I2C_TransmitterByteSend function.
If 10-bit addressing is being used for this transfer, then the start condition and first byte of the
10-bit address must be followed by the second byte of the 10-bit address. Multiple slaves
may respond to the first byte of the 10-bit address. It requires the second byte to uniquely
identify the 10-bit slave. However, this is sent using the same process as if it were a data
byte.
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Master
Interrupt,
Byte
Completed
Transmit Transmit Software must call the PLIB_I2C_TransmitterByteWasAcknowledged function check to
ensure that the slave device ACKed the byte and the PLIB_I2C_ArbitrationLossHasOccurred
function to determine if a collision occurred. If all is well, software may call the
PLIB_I2C_TransmitterIsReady function and PLIB_I2C_TransmitterByteSend function to send
another byte to the slave and remain in the Transmit state. If not, software should abort the
transfer by sending a Stop condition and transition to the Stop, repeated Start state.
Master
Interrupt,
Byte
Completed
7-bit
Address,
Write
Stop,
repeated
Start
If the slave NAKed any byte sent or if software wishes to end or re-start the transfer (perhaps
to change direction) it can do so by sending a stop condition (using the
PLIB_I2C_MasterStop function) or repeated Start condition (using the
PLIB_I2C_MasterStartRepeat function).
Master
Interrupt,
Byte
Completed
Transmit Stop,
repeated
Start
Software must call the PLIB_I2C_TransmitterByteWasAcknowledged function check to check
to see if the slave ACKed or NAKed the byte. If the slave NAKed the byte or if software
wishes to end or re-start the transfer (perhaps to change direction) it can do so by sending a
Stop condition (using the PLIB_I2C_MasterStop function) or repeated Start condition (using
the PLIB_I2C_MasterStartRepeat function).
Restart Stop,
repeated
Start
Start Immediately after initiating the repeated Start condition, software transitions back to the Start
state where it must decide what sort of transfer it will start next.
Note: Read transfers will transition to the Start state in the Master Mode Read Transfer state
machine.
Master
Interrupt,
Stop
Completed
Stop,
repeated
Start
Wait When the master interrupt occurs, indicating that the Stop condition has completed, software
transitions back to the Wait state (which is actually part of the Slave Mode state machine).
Master-Mode Read-Transfer State Machine
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Master Mode Read Transfer State Transitions
In Master mode, transitions are initiated under software control and interrupts occur (the master interrupt flag is set, even when
interrupts are disabled) when the action initiated has completed.
If at any point, an address or data byte is NAKed by the slave or an error occurs, usually the safest thing for the master to do is
to end the transfer with a Stop condition and release the bus.
Transition From
State
To State Software Actions
Begin
Master
Transfer
Wait Start This state transition occurs when software initiates transmission of the start condition.
Software should call the PLIB_I2C_BusIsIdle function to verify that the bus is not currently in
use by another master. Then it must call the PLIB_I2C_MasterStart function (or
PLIB_I2C_MasterStartRepeat function) to send the start (or repeated Start) condition.
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Master
Interrupt,
Start
Completed
Start 7-Bit
Address,
Read
After the start condition has completed, software should check for a possible collision by
calling the PLIB_I2C_ArbitrationLossHasOccurred function. Then, it must send an
appropriately formatted 7-bit address byte (or the first byte of the 10-bit address) to the I2C
bus to address a slave target. To do this, it should first call the
PLIB_I2C_TransmitterIsReady function to verify that the transmitter buffer is ready to accept
a byte and then call the PLIB_I2C_TransmitterByteSend function to send the byte.
Note: If using 10-bit addressing, this is a repeated transmission of the first byte of the 10-bit
address since all 10-bit transfers must start off as write transfers (so both address bytes can
be sent) then be re-started to become read transfers.
Master
Interrupt,
Byte
Completed
7-Bit
Address,
Read
Receive Software must initiate the "Clock1Byte" operation (using the
PLIB_I2C_MasterReceiverClock1Byte function) so that the I2C module will cycle the SCL
line eight times causing the slave to send the requested byte of data.
Master
Interrupt,
Byte
Available
Receive ACK
NAK
When a byte has been received (which software can verify using the
PLIB_I2C_ReceivedByteIsAvailable function), software must get the received byte from the
RX buffer (using the PLIB_I2C_ReceivedByteGet function) and initiate transmission of the
ACK/NAK bit (using the PLIB_I2C_ReceivedByteAcknowledge function). If it intends to
receive another byte, software must ACK the byte just received. If it does not intend to
receive another byte, software must NAK the byte just received.
Master
Interrupt,
ACK
Completed
ACK,
NAK
Receive Software can verify that the ACK signal has completed using the
PLIB_I2C_ReceiverByteAcknowledgeHasCompleted function. If software ACKed the
previously received byte, it must initiate the "Clock1Byte" operation (using the
PLIB_I2C_MasterReceiverClock1Byte function) so that the I2C module will cycle the SCL
line eight times so that the slave can send the requested byte. Otherwise, software must
have NAKed the previous byte to end the transfer.
Master
Interrupt,
NAK
Completed
ACK,
NAK
Stop,
Restart
Software can verify that the NAK signal has completed using the
PLIB_I2C_ReceiverByteAcknowledgeHasCompleted function. If software intends to continue
the transfer without allowing the bus to go idle, it must initiate a repeated-start (using the
PLIB_I2C_MasterStartRepeat function) and transition immediately to the Start state. If
software intends to end the transfer and allow the bus to go idle, it must initiate a Stop
condition using the PLIB_I2C_MasterStop function.
Restart Stop,
repeated
Start
Start Immediately after initiating the repeated Start condition, software automatically transitions
back to the "Start" state where it must decide if it will restart with a read or write transfer.
Note: Write transfers will transition to the Start state in the Master Mode Write Transfer state
machine.
Master
Interrupt,
Stop
Completed
Stop,
repeated
Start
Wait When the master interrupt occurs, indicating that the Stop condition has completed, software
transitions back to the waiting state (which is actually part of the Slave Mode state machine).
5.6.9.4.7 Managing Slave Addresses
An I2C address identifies which slave device is being targeted by a master device on a transfer-by-transfer basis. I2C addresses
can be either 7-bits or 10-bits, as shown in the following sections, 7-Bit Slave Addresses and 10-Bit Slave Addresses.
Addresses that are 7-bits long are sent in a single byte where bit 0 identifies the direction of the remaining data in the transfer.
Addresses that are 10-bits long are sent in two bytes using a reserved range in the 7-bit address space (addresses 0x78 through
0x7C) to encode the two high-order bits (bits A9 and A8) in the first byte. The second byte encodes the eight low-order bites (A7
through A0). These formats are in the following two sections.
7-Bit Slave Addresses
When using 7-bit slave addressing, the address byte is the first byte sent by any I2C master device immediately following a
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"Start" condition. The 7-bit address is shifted left by 1 bit to fill bits 7-to-1 in the address byte. Bit 0 in the 7-bit address byte
indicates the transfer direction, as follows.
Bits Usage
A6:A0 Bits 7 through 1 of the address byte contain the 7-bit slave address.
R/W Bit 0 of the address byte is the read/write bit (0 = Read, 1 = Write).
The I2C_ADDRESS_7_BIT_FORMAT macro can be used to correctly format a 7-bit slave address. The
I2C_ADDRESS_7_BIT_BYTE_ACCESS macro can be used to access the byte-format of the address (including the read/write
bit). See Operating as a Master Transmitter and Operating as a Master Receiver for examples.
10-Bit Slave Addresses
When using 10-bit slave addresses, the first address byte must be sent immediately following a start or repeated Start condition.
The second byte must immediately follow the first byte when performing a write transfer. Read transfers must begin as write
transfers so that both bytes may be sent. Immediately after sending the second address byte, the master will issue a repeated
Start condition and resend the first address byte only (with the read/write bit cleared, indicating a read transfer. The second byte
is not retransmitted. Since the transfer has been restarted, all listening 10-bit slave devices know that they will not be address
again until the transfer has been ended with a Stop condition. However, devices that respond to 7-bit addresses might respond,
so the first byte of the 10-bit address must be repeated to prevent that. The format of the 10-bit address is shown as follows.
Bits Usage
11110 Bits 7 through 3 of the first byte are constants. This guarantees that the first byte of the 10-bit address will fall within the
reserved range of the 7-bit addresses.
A9:A8 Bits 2 through 1 of the first byte are the two high-order bits of the 10-bit address.
R/W Bit 0 of the first byte is the Read/Write bit (0 = Read, 1 = Write).
A7:A0 The second byte contains the 8 low-order bits of the 10-bit address.
The I2C_ADDRESS_10_BIT_FORMAT macro can be used to correctly format a 10-bit slave address. The
I2C_ADDRESS_10_BIT_1ST_BYTE_ACCESS macro can be used to access the first byte of the 10-bit address and the
I2C_ADDRESS_10_BIT_2ND_BYTE_ACCESS macro can be used to access the second byte of the 10-bit address. See
Operating as a Master Transmitter and Operating as a Master Receiver for examples.
Operating in Slave Mode
In Slave mode, the "slave address" refers to the address (and optional mask) programmed into the I2C module to determine to
which address or addresses the module will respond when addressed by an external master. The "raw" (unformatted) address is
passed to or returned from the Managing Slave Addresses routines (without being formatted as shown above). Likewise, the
mask passed to or returned from the Slave Mask Control Functions is unformatted.
Operating in Master Mode
In Master mode, the "slave address" refers to the address transmitted on the I2C bus to identify the slave target of the transfer. In
these cases, the slave address must be correctly formatted (as shown above) and sent on the bus one byte at a time.
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5.6.9.4.8 Forming Transfers
Forming Transfers
Transfers are formed by chaining the basic "building blocks" shown in the following transfer format legend.
The following are all valid I2C transfer formats:
• This format allows a master to transmit n bytes of data to an I2C slave supporting a 7-bit address.
• This format allows a master to receive n+1 bytes of data from a "streaming" slave. Such a slave has no internal addressing
capability. That is, it has no internal registers or addresses. It can only "stream" data to a master that reads from it.
• This format allows a master to write n bytes of data to a slave, followed immediately by reading n+1 bytes of data from a slave
by sending a repeated Start condition after the first transfer. This format is useful for specifying an internal address to a
device, and then reading data from that address. A repeated Start condition can also be used to chain transfers together
without letting the bus go idle and potentially losing arbitration.
• The following format allows a master to send n bytes of data to a target supporting a 10-bit address.
• This format is used to receive n+1 bytes of data from a slave supporting a 10-bit address. The repeated Start condition must
be used because the second byte of the 10-bit address must be sent after the first byte of the 10-bit address. Then, the
direction of the transfer must be switched to a "read". To do this, after the repeated Start, the master repeats the first byte of
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the 10-bit address with a "read" indication in the low-order bit and 10-bit slave devices must "remember" if they were being
addressed once the transfer has started.
• This format allows a master to send n bytes of data to a slave device supporting a 10-bit address and immediately read n+1
bytes of data from the same device using the repeated Start and resending the first byte of the 10-bit address technique as
shown in the previous format. This format is useful when the master needs to read data from a specific address within a
device and it needs to send that address before performing the read.
• This format allows a master to chain writes to multiple slaves supporting 10-bit addresses.
• This format allows a master to chain multiple writes to different slaves. Note that only the first write can be to a slave
supporting a 7-bit address. The second (and any subsequent) writes must be to slaves with 10-bit addresses once any 10-bit
device has been addressed.
• This format can be used by a "hardware" master that does not have a programmable address. This allows the hardware
master to broadcast to all slaves on the bus using the "General Call" address, followed by the master's address. (The master
address is generally the same as the device's slave address if it can also act as a slave device.) This format is not normally
used by a microcontroller acting as a master. However, it may be received by a microcontroller if such a hardware master
exists on the bus.
5.6.9.4.9 Handling Errors
There are three basic types of errors that can occur during various I2C operations:
• Transmitter Overflow
• Receiver Overflow
• Arbitration Loss
Handling Transmitter Overflow Errors
A transmitter overflow error occurs when the software attempts to write to the TX buffer (by calling the
PLIB_I2C_TransmitterByteSend function) while the transmitter is busy. When this occurs, the write is not allowed and the
transmitter overflow status bit is set. This can be identified by calling the PLIB_I2C_TransmitterOverflowHasOccurred function.
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Additional attempts to write to the TX buffer will not be allowed until the transmitter overflow error is cleared by calling the
PLIB_I2C_TransmitterOverflowClear function. This sort of error should be either avoided by checking the
PLIB_I2C_TransmitterIsReady function before attempting to send a byte or by checking for the error after attempting to send a
byte.
Interrupts: The transmitter overflow error does not trigger an interrupt.
Handling Receiver Overflow Errors
A receiver overflow error occurs when an incoming byte has been completely received and is ready to be transferred to the RX
buffer, but software has not yet gotten the previous byte from the RX buffer. When this happens the receiver overflow status bit
is set and the incoming byte will be lost. This can happen when software does not respond quickly enough to a slave or master
interrupt when receiving data. Software should check for this error before calling the PLIB_I2C_ReceivedByteGet function to get
a byte from the RX buffer to determine if any data has been lost. This error can be identified by calling the
PLIB_I2C_ReceiverOverflowHasOccurred function. This error must be cleared by calling the PLIB_I2C_ReceiverOverflowClear
function or no additional data will be received.
Interrupts: The receiver overflow error does not trigger an interrupt (although the incoming data byte does, even though it is lost.)
Handling Arbitration Loss Errors
Strictly speaking, arbitration loss is not an error. Rather it is a normal part of bus operation in a multi-master environment.
Arbitration loss occurs when more than one master attempts to transmit on the bus at the same (or nearly the same) time. When
this happens, at some point one of the masters will attempt to transmit a binary one ('1') when the other attempts to transmit a
binary zero ('0'). At that point, the master transmitting the zero will win the transmission, because the zero transmission will
dominate on the bus. The master detecting that the bus signals a zero when it attempted to transmit a one will loose arbitration
and must immediately stop transmitting on the bus (which happens automatically).
Arbitration loss can be detected during any of the following actions:
• Transmission of a Start condition
• Transmission of a repeated Start condition
• Transmission of an address or data byte
• Transmission of an acknowledge bit
• Transmission of a Stop condition
Arbitration loss can be identified by calling the PLIB_I2C_ArbitrationLossHasOccurred function. The arbitration loss condition can
be cleared by calling the PLIB_I2C_ArbitrationLossClear function. Once arbitration loss occurs, the loosing master must wait
until the bus is once again idle (at which time a master interrupt will occur if arbitration loss has occurred) and retransmit the
transfer from the beginning.
Interrupts: The I2C module will trigger an error interrupt when arbitration loss occurs.
5.6.9.4.10 Other Features
Other Features
Note: The following features are not available on all devices. Please refer to the specific device data sheet to determine which
features are supported by your device.
General Call Address Support
The I2C General Call address (reserved address 0) allows a master to address all slave devices on the bus. During slave
operation the module can be made to respond to or ignore the general call address using the PLIB_I2C_GeneralCallEnable
function or the PLIB_I2C_GeneralCallDisable function. When a slave address byte is received, software can identify if it was was
the general call address using the PLIB_I2C_SlaveAddressIsGeneralCall function (or by checking the value of the address byte
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received).
Note: The general call address is always 7-bits.
SMBus Support
The I2C module can support communication on a System Management Bus (SMBus) by calling the PLIB_I2C_SMBEnable
function to adjust the electrical characteristics of the SMBus.
Operation During Sleep Mode
When the device enters Sleep mode, all clock sources supplied to the I2C modules are shut down. If the device enters Sleep
mode in the middle of an I2C master transmission or reception operation, the operation is aborted. If the device enters Sleep
mode when the module is operating in slave mode, the external master's clock will continue run the slave state machine. If a
slave address match occurs, an interrupt will be provided to wake up the device.
Note: Indeterminate results can occur if an error occurs during Sleep mode.
Operation During Idle Mode
When the device enters Idle mode, the system clock sources remain functional and the CPU stops code execution.
I
2C operation during Idle mode can be controlled using the PLIB_I2C_StopInIdleEnable function or the
PLIB_I2C_StopInIdleDisable function.
By default, the I2C module continues to operate in Idle mode and provide full functionality.
Operation with DMA
Software activity must occur between the transfer of each byte, making DMA inappropriate for use with the I2C module.
5.6.9.4.11 Using the Library
Using the Libary
This section describes the basic architecture of the I2C Peripheral Library and provides information and examples on how to use
it.
Interface Header File: plib_i2c.h
The interface to the I2C library is defined in the "plib_i2c.h" header file, which is included by the "peripheral.h" peripheral library
header file. Any C language source (.c) file that uses the I2C library must include "peripheral.h".
Peripheral Module IDs
Peripheral libraries are indexed to allow a single library to control any number of instances of a peripheral in a single
microcontroller. To support this, the first parameter to each operation in a peripheral library is the module instance ID. The
module instance ID is defined by an enumeration that is defined in the processor-specific header files (included by the library's
interface header). For the I2C Peripheral Library, the module instance IDs are defined by the I2C Module enumeration. Not all
microcontrollers will have all instances of the module listed in this enumeration. Please refer to the specific device data sheet for
more information.
5.6.9.4.11.1 Hardware Abstraction Model
This library provides a low-level abstraction of the Inter-Integrated Circuit (I2C) module on Microchip PIC microcontrollers with a
convenient C language interface. This topic describes how that abstraction is modeled in software and introduces the library's
interface.
Hardware Abstraction Model Diagram
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Hardware Abstraction Model Description
The I2C Peripheral Library provides interface routines to interact with the blocks shown in the previous diagram.
The TX Buffer and RX Buffer are 1-byte (8-bit) buffers for data transmitted (TX) or received (RX) by the Serial Interface to the
I
2C bus over the SDA line synchronized with the SCL line by the Clock Control logic.
The desired baud rate frequency can be programmed in the Clock Control logic (within I2C bus specifications of 0-100 kHz for
Low-to-Fast I2C mode and up to 3.4 MHz for High-Speed I2C mode) by setting the Buad Rate value. However, the nature of the
I
2C bus allows slower targets to stretch the clock to slower rates as required, in real time.
The I2C bus is a transfer-based multi-master bus, allowing multiple masters to initiate transfers at any time the bus is not
currently busy. The Master Arbiter logic monitors transfers and determines if arbitration has been lost. There is no loss of data
for the winning master. However, the losing master must retry the entire transfer again later, when the bus is idle. Slave devices
are identified by either 7- or-10 bit addresses. The I2C module can act as either a bus master that can initiate transfers or as a
slave, responding to transfers initiated by other masters on the bus.
The Slave Address Detect logic monitors transfers initiated by other masters to recognize when other masters have addressed
this module when it is acting as a slave. The Slave Address is programmed into the I2C module by the software along with an
(optional) address Mask, specifying bits in the address that can be ignored. This ability to "mask off" certain bits in the address
allows the I2C module to identify multiple addresses and respond as if it were more than one slave device.
5.6.9.4.11.2 Library Usage Model
Usage Model
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The items in the diagram correspond to the groupings in the Library Interface section.
Library Interface Section Description
5.6.9.4.12 Configuring the Library
This library is appropriate for microcontrollers with a dedicated I2C module (not an SSP or MSSP module).
5.6.9.5 Library Interface
Data Types and Constants
Name Description
I2C_MODULE_ID Identifies the supported I2C modules.
Baud Rate Generator Control Functions
Name Description
PLIB_I2C_BaudRateGet Calculates the I2C module's current SCL clock frequency.
PLIB_I2C_BaudRateSet Sets the desired baud rate.
Existence Functions
Name Description
PLIB_I2C_ExistsAcksequenceProgress Identifies whether the AcksequenceIsInProgress feature exists on
the I2C module
PLIB_I2C_ExistsArbitrationLoss Identifies whether the ArbitrationLoss feature exists on the I2C
module
PLIB_I2C_ExistsBaudRate Identifies whether the BaudRate feature exists on the I2C module
PLIB_I2C_ExistsBusIsIdle Identifies whether the BusIdle feature exists on the I2C module
PLIB_I2C_ExistsClockStretching Identifies whether the ClockStretching feature exists on the I2C
module
PLIB_I2C_ExistsDataLineHoldTime Identifies whether the DataLineHoldTime feature exists on the I2C
module
PLIB_I2C_ExistsGeneralCall Identifies whether the GeneralCall feature exists on the I2C module
PLIB_I2C_ExistsGeneralCallAddressDetect Identifies whether the GeneralCallAddressDetect feature exists on
the I2C module
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PLIB_I2C_ExistsHighFrequency Identifies whether the HighFrequency feature exists on the I2C
module
PLIB_I2C_ExistsIPMI Identifies whether the IPMI feature exists on the I2C module
PLIB_I2C_ExistsMasterReceiverClock1Byte Identifies whether the MasterReceiverClock1Byte feature exists on
the I2C module
PLIB_I2C_ExistsMasterStart Identifies whether the MasterStart feature exists on the I2C module
PLIB_I2C_ExistsMasterStartRepeat Identifies whether the MasterStartRepeat feature exists on the I2C
module
PLIB_I2C_ExistsMasterStop Identifies whether the MasterStop feature exists on the I2C module
PLIB_I2C_ExistsModuleEnable Identifies whether the ModuleEnable feature exists on the I2C
module
PLIB_I2C_ExistsReceivedByteAcknowledge Identifies whether the ReceivedByteAcknowledge feature exists on
the I2C module
PLIB_I2C_ExistsReceivedByteAvailable Identifies whether the ReceivedByteAvailable feature exists on the
I2C module
PLIB_I2C_ExistsReceivedByteGet Identifies whether the ReceivedByteGet feature exists on the I2C
module
PLIB_I2C_ExistsReceiverOverflow Identifies whether the ReceiverOverflow feature exists on the I2C
module
PLIB_I2C_ExistsReservedAddressProtect Identifies whether the ReservedAddressProtect feature exists on
the I2C module
PLIB_I2C_ExistsSlaveAddress10Bit Identifies whether the SlaveAddress10Bit feature exists on the I2C
module
PLIB_I2C_ExistsSlaveAddress7Bit Identifies whether the SlaveAddress7Bit feature exists on the I2C
module
PLIB_I2C_ExistsSlaveAddressDetect Identifies whether the SlaveAddressDetect feature exists on the
I2C module
PLIB_I2C_ExistsSlaveAddressHoldEnable Identifies whether the SlaveAddressHoldEnable feature exists on
the I2C module
PLIB_I2C_ExistsSlaveBufferOverwrite Identifies whether the SlaveBufferOverwrite feature exists on the
I2C module
PLIB_I2C_ExistsSlaveBusCollisionDetect Identifies whether the SlaveBusCollisionDetect feature exists on
the I2C module
PLIB_I2C_ExistsSlaveClockHold Identifies whether the SlaveClockHold feature exists on the I2C
module
PLIB_I2C_ExistsSlaveDataDetect Identifies whether the SlaveDataDetect feature exists on the I2C
module
PLIB_I2C_ExistsSlaveInterruptOnStart Identifies whether the SlaveInterruptOnStart feature exists on the
I2C module
PLIB_I2C_ExistsSlaveInterruptOnStop Identifies whether the SlaveInterruptOnStop feature exists on the
I2C module
PLIB_I2C_ExistsSlaveMask Identifies whether the SlaveMask feature exists on the I2C module
PLIB_I2C_ExistsSlaveReadRequest Identifies whether the SlaveReadRequest feature exists on the I2C
module
PLIB_I2C_ExistsSMBus Identifies whether the SMBus feature exists on the I2C module
PLIB_I2C_ExistsStartDetect Identifies whether the StartDetect feature exists on the I2C module
PLIB_I2C_ExistsStopDetect Identifies whether the StopDetect feature exists on the I2C module
PLIB_I2C_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the I2C module
PLIB_I2C_ExistsTransmitterByteAcknowledge Identifies whether the TransmitterByteAcknowledge feature exists
on the I2C module
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PLIB_I2C_ExistsTransmitterByteComplete Identifies whether the TransmitterByteComplete feature exists on
the I2C module
PLIB_I2C_ExistsTransmitterByteSend Identifies whether the TransmitterByteSend feature exists on the
I2C module
PLIB_I2C_ExistsTransmitterIsBusy Identifies whether the TransmitterBusy feature exists on the I2C
module
PLIB_I2C_ExistsTransmitterOverflow Identifies whether the TransmitterOverflow feature exists on the I2C
module
General Initialization Functions
Name Description
PLIB_I2C_Disable Disables the specified I2C module.
PLIB_I2C_Enable Enables the specified I2C module.
PLIB_I2C_GeneralCallDisable Disables the I2C module from recognizing the general call address.
PLIB_I2C_GeneralCallEnable Enables the I2C module to recognize the general call address.
PLIB_I2C_HighFrequencyDisable Disables the I2C module from using high frequency (400 kHz or 1
MHz) signaling.
PLIB_I2C_HighFrequencyEnable Enables the I2C module to use high frequency (400 kHz or 1 MHz)
signaling.
PLIB_I2C_IPMIDisable Disables the I2C module's support for the IPMI specification
PLIB_I2C_IPMIEnable Enables the I2C module to support the Intelligent Platform
Management Interface (IPMI) specification (see Remarks).
PLIB_I2C_ReservedAddressProtectDisable Disables the I2C module from protecting reserved addresses, allowing
it to respond to them.
PLIB_I2C_ReservedAddressProtectEnable Enables the I2C module to protect (not respond to) reserved
addresses.
PLIB_I2C_SlaveClockStretchingDisable Disables the I2C module from stretching the slave clock.
PLIB_I2C_SlaveClockStretchingEnable Enables the I2C module to stretch the slave clock.
PLIB_I2C_SMBDisable Disable the I2C module support for SMBus electrical signaling levels.
PLIB_I2C_SMBEnable Enables the I2C module to support System Management Bus
(SMBus) electrical signaling levels.
PLIB_I2C_StopInIdleDisable Disables the Stop-in-Idle feature.
PLIB_I2C_StopInIdleEnable Enables the I2C module to stop when the processor enters Idle mode
General Status Functions
Name Description
PLIB_I2C_ArbitrationLossClear Clears the arbitration loss status flag
PLIB_I2C_ArbitrationLossHasOccurred Identifies if bus arbitration has been lost.
PLIB_I2C_BusIsIdle Determines whether the I2C bus is idle or busy.
PLIB_I2C_StartClear Clears the start status flag
PLIB_I2C_StartWasDetected Identifies when a Start condition has been detected.
PLIB_I2C_StopClear Clears the stop status flag
PLIB_I2C_StopWasDetected Identifies when a Stop condition has been detected
Master Control Functions
Name Description
PLIB_I2C_MasterReceiverClock1Byte Drives the bus clock to receive 1 byte of data from a slave device.
PLIB_I2C_MasterStart Sends an I2C Start condition on the I2C bus in Master mode.
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PLIB_I2C_MasterStartRepeat Sends a repeated Start condition during an ongoing transfer in Master
mode.
PLIB_I2C_MasterStop Sends an I2C Stop condition to terminate a transfer in Master mode.
Receiver Control Functions
Name Description
PLIB_I2C_ReceivedByteAcknowledge Allows a receiver to acknowledge a that a byte of data has
been received.
PLIB_I2C_ReceivedByteGet Gets a byte of data received from the I2C bus interface.
PLIB_I2C_ReceivedByteIsAvailable Detects whether the receiver has data available.
PLIB_I2C_ReceiverByteAcknowledgeHasCompleted Determines if the previous acknowledge has completed.
PLIB_I2C_ReceiverOverflowClear Clears the receiver overflow status flag.
PLIB_I2C_ReceiverOverflowHasOccurred Identifies if a receiver overflow error has occurred.
PLIB_I2C_MasterReceiverReadyToAcknowledge Checks whether the hardware is ready to acknowledge.
Slave Address Control Functions
Name Description
PLIB_I2C_SlaveAddress10BitGet Identifies the current 10-bit Slave mode address.
PLIB_I2C_SlaveAddress10BitSet Selects 10-bit Slave mode addressing and sets the address value.
PLIB_I2C_SlaveAddress10BitWasDetected Detects reception of the second byte of a 10-bit slave address.
PLIB_I2C_SlaveAddress7BitGet Identifies the current 7-bit Slave mode address.
PLIB_I2C_SlaveAddress7BitSet Selects 7-bit Slave mode addressing and sets the slave address value.
PLIB_I2C_SlaveAddressHoldDisable Disables Address holding.
PLIB_I2C_SlaveAddressHoldEnable Enables address holding.
PLIB_I2C_SlaveAddressIsDetected Detects if the most recent byte received is a data or an address byte.
PLIB_I2C_SlaveAddressIsGeneralCall Identifies if the current slave address received is the general call
address.
PLIB_I2C_SlaveAddressModeIs10Bits Identifies if the current slave address mode is 7-bits or 10-bits.
PLIB_I2C_SlaveDataIsDetected Detects if the most recent byte received is a data or an address byte.
PLIB_I2C_SlaveReadIsRequested Detects if the request from the master was a read or write.
Slave Control Functions
Name Description
PLIB_I2C_AcksequenceIsInProgress Checks whether the acknowledge sequence is in progress or it is
completed.
PLIB_I2C_DataLineHoldTimeSet Sets the data line hold time.
PLIB_I2C_SlaveBufferOverwriteDisable Disables buffer overwrite.
PLIB_I2C_SlaveBufferOverwriteEnable Enables buffer overwrite.
PLIB_I2C_SlaveBusCollisionDetectDisable Disables bus collision detect interrupts.
PLIB_I2C_SlaveBusCollisionDetectEnable Enables slave bus collision interrupts.
PLIB_I2C_SlaveClockHold Holds the SCL clock line low after receiving a byte.
PLIB_I2C_SlaveClockRelease Releases a previously held SCL clock line.
PLIB_I2C_SlaveDataHoldDisable Disables data holding.
PLIB_I2C_SlaveDataHoldEnable Enables data holding.
PLIB_I2C_SlaveInterruptOnStartDisable Disables the featue of generating interrupt on start condition.
PLIB_I2C_SlaveInterruptOnStartEnable Enables the featue of generating interrupt on start condition.
PLIB_I2C_SlaveInterruptOnStopDisable Disables the featue of generating interrupt on stop condition.
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PLIB_I2C_SlaveInterruptOnStopEnable Enables the featue of generating interrupt on stop condition.
Slave Mask Control Functions
Name Description
PLIB_I2C_SlaveMask10BitGet Identifies the current 10-bit Slave mode address mask.
PLIB_I2C_SlaveMask10BitSet Sets the 10-bit mask for Slave mode addressing.
PLIB_I2C_SlaveMask7BitGet Identifies the current 7-bit Slave mode address mask.
PLIB_I2C_SlaveMask7BitSet Sets the 7-bit mask for Slave mode addressing .
Transmitter Control Functions
Name Description
PLIB_I2C_TransmitterByteHasCompleted Detects whether the module has finished transmitting the most
recent byte.
PLIB_I2C_TransmitterByteSend Sends a byte of data on the I2C bus.
PLIB_I2C_TransmitterByteWasAcknowledged Determines whether the most recently sent byte was acknowledged.
PLIB_I2C_TransmitterIsBusy Identifies if the transmitter of the specified I2C module is currently
busy (unable to accept more data).
PLIB_I2C_TransmitterIsReady Detects if the transmitter is ready to accept data to transmit.
PLIB_I2C_TransmitterOverflowClear Clears the transmitter overflow status flag.
PLIB_I2C_TransmitterOverflowHasOccurred Identifies if a transmitter overflow error has occurred.
Description
The I2C peripheral library consists of a set of interface routines, data types and constants, and macros provided by the plib_i2c.h
header file. This section describes those items.
5.6.9.5.1 General Initialization Functions
5.6.9.5.1.1 PLIB_I2C_Disable Function
C
void PLIB_I2C_Disable(
I2C_MODULE_ID index
);
Description
This function disables the specified I2C module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
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This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsModuleEnable in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_Disable( MY_I2C_ID );
5.6.9.5.1.2 PLIB_I2C_Enable Function
C
void PLIB_I2C_Enable(
I2C_MODULE_ID index
);
Description
This function enables the specified I2C module.
Preconditions
The module should be appropriately configured before being enabled.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsModuleEnable in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
#define MY_CLOCK_FREQUENCY 80000000
#define MY_BAUD_RATE 10000
#define MY_SLAVE_ADDRESS 0x23
PLIB_I2C_SlaveClockStretchingEnable ( MY_I2C_ID );
PLIB_I2C_SMBDisable ( MY_I2C_ID );
PLIB_I2C_HighFrequencyDisable ( MY_I2C_ID );
PLIB_I2C_ReservedAddressProtectEnable ( MY_I2C_ID );
PLIB_I2C_StopInIdleDisable ( MY_I2C_ID );
PLIB_I2C_BaudRateSet ( MY_I2C_ID, MY_CLOCK_FREQUENCY, MY_BAUD_RATE );
PLIB_I2C_SlaveAddress7BitSet( MY_I2C_ID, MY_SLAVE_ADDRESS );
PLIB_I2C_Enable ( MY_I2C_ID );
5.6.9.5.1.3 PLIB_I2C_GeneralCallDisable Function
C
void PLIB_I2C_GeneralCallDisable(
I2C_MODULE_ID index
);
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Description
This function disables the I2C module from recognizing the general call address when operating as a slave receiver.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The General-call feature can be re-enabled by calling the PLIB_I2C_GeneralCallEnable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsGeneralCall in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_GeneralCallDisable(MY_I2C_ID);
5.6.9.5.1.4 PLIB_I2C_GeneralCallEnable Function
C
void PLIB_I2C_GeneralCallEnable(
I2C_MODULE_ID index
);
Description
This function enables the I2C module to recognize the general call address when operating as a slave receiver.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The General-call feature can be disabled by calling the PLIB_I2C_GeneralCallDisable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsGeneralCall in your application to determine whether this feature is available.
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Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_GeneralCallEnable ( MY_I2C_ID );
5.6.9.5.1.5 PLIB_I2C_HighFrequencyDisable Function
C
void PLIB_I2C_HighFrequencyDisable(
I2C_MODULE_ID index
);
Description
This function disables the I2C module from using high-frequency signaling, preventing it from using the 400 kHz and 1 MHz
signaling rates.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The high-frequency feature can be re-enabled by calling the PLIB_I2C_HighFrequencyEnable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsHighFrequency in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_HighFrequencyDisable ( MY_I2C_ID );
5.6.9.5.1.6 PLIB_I2C_HighFrequencyEnable Function
C
void PLIB_I2C_HighFrequencyEnable(
I2C_MODULE_ID index
);
Description
This function enables the I2C module to use high-frequency signaling, allowing it to use the 400 kHz and 1 MHz signaling rates.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
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Returns
None.
Remarks
The high-speed feature can be disabled by calling the PLIB_I2C_HighSpeedEnable function.
This feature must be enabled if frequencies higher than 100 kHz programmed using the PLIB_I2C_BaudRateSet function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsHighFrequency in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_HighFrequencyEnable ( MY_I2C_ID );
5.6.9.5.1.7 PLIB_I2C_IPMIDisable Function
C
void PLIB_I2C_IPMIDisable(
I2C_MODULE_ID index
);
Description
This function disables the I2C module's support for the IPMI specification.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
Please refer to the IPMI specification for details of the Intelligent Platform Management Interface. The IPMI specification is the
property of Intel Corporation, Hewlett-Packard Company, NEC Corporation, and Dell Inc.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsIPMI in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_IPMIDisable ( MY_I2C_ID );
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5.6.9.5.1.8 PLIB_I2C_IPMIEnable Function
C
void PLIB_I2C_IPMIEnable(
I2C_MODULE_ID index
);
Description
This function enables the I2C module to support the IPMI specification.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
Please refer to the IPMI specification for details of the Intelligent Platform Management Interface. The IPMI specification is the
property of Intel Corporation, Hewlett-Packard Company, NEC Corporation, and Dell Inc.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsIPMI in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_IPMIEnable ( MY_I2C_ID );
5.6.9.5.1.9 PLIB_I2C_ReservedAddressProtectDisable Function
C
void PLIB_I2C_ReservedAddressProtectDisable(
I2C_MODULE_ID index
);
Description
This function disables the I2C module from protecting reserved addresses, allowing it to respond to them when they match the
module's slave address and mask.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
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Remarks
The reserved-address-protect feature can be re-enabled by calling the PLIB_I2C_ReservedAddressProtectEnable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsReservedAddressProtect in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_ReservedAddressProtectDisable ( MY_I2C_ID );
5.6.9.5.1.10 PLIB_I2C_ReservedAddressProtectEnable Function
C
void PLIB_I2C_ReservedAddressProtectEnable(
I2C_MODULE_ID index
);
Description
This function enables the I2C module to protect reserved addresses by not responding to them, even if they match the module's
slave address and mask.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The reserved-address-protect feature can be disabled by calling the PLIB_I2C_ReservedAddressProtectDisable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsReservedAddressProtect in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_ReservedAddressProtectEnable(MY_I2C_ID);
5.6.9.5.1.11 PLIB_I2C_SlaveClockStretchingDisable Function
C
void PLIB_I2C_SlaveClockStretchingDisable(
I2C_MODULE_ID index
);
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Description
This function disables the I2C module from stretching the slave clock to allow time for software to respond to bytes received from
the master.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The clock stretching feature can be re-enabled by calling the PLIB_I2C_SlaveClockStretchingEnable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsClockStretching in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveClockStretchingDisable ( MY_I2C_ID );
5.6.9.5.1.12 PLIB_I2C_SlaveClockStretchingEnable Function
C
void PLIB_I2C_SlaveClockStretchingEnable(
I2C_MODULE_ID index
);
Description
This function enables the I2C module to stretch the slave clock to allow time for software to respond to bytes received from the
master.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The clock stretching feature can be disabled by calling the PLIB_I2C_SlaveClockStretchingDisable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
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This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsClockStretching in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveClockStretchingEnable ( MY_I2C_ID );
5.6.9.5.1.13 PLIB_I2C_SMBDisable Function
C
void PLIB_I2C_SMBDisable(
I2C_MODULE_ID index
);
Description
This function disables the I2C module support for SMBus electrical signaling levels.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The SMB feature can be re-enabled by calling the PLIB_I2C_SMBEnable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSMBus in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SMBDisable ( MY_I2C_ID );
5.6.9.5.1.14 PLIB_I2C_SMBEnable Function
C
void PLIB_I2C_SMBEnable(
I2C_MODULE_ID index
);
Description
This function enables the I2C module to support SMBus electrical signaling levels.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The SMB feature can be disabled by calling the PLIB_I2C_SMBDisable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSMBus in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SMBEnable ( MY_I2C_ID );
5.6.9.5.1.15 PLIB_I2C_StopInIdleDisable Function
C
void PLIB_I2C_StopInIdleDisable(
I2C_MODULE_ID index
);
Description
This function disables the Stop-in-Idle feature, preventing the I2C module from stopping when the processor enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The Stop-in-Idle feature can be re-enabled by calling the PLIB_I2C_StopInIdleEnable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsStopInIdle in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_StopInIdleDisable ( MY_I2C_ID );
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5.6.9.5.1.16 PLIB_I2C_StopInIdleEnable Function
C
void PLIB_I2C_StopInIdleEnable(
I2C_MODULE_ID index
);
Description
This function enables the I2C module to stop when the processor enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The Stop-in-Idle feature can be disabled by calling the PLIB_I2C_StopInIdleDisable function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsStopInIdle in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_StopInIdleEnable ( MY_I2C_ID );
5.6.9.5.2 General Status Functions
5.6.9.5.2.1 PLIB_I2C_ArbitrationLossClear Function
C
void PLIB_I2C_ArbitrationLossClear(
I2C_MODULE_ID index
);
Description
This function clears the arbitration loss status flag.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
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Returns
None.
Remarks
This flag is set by hardware when bus arbitration loss occurs. Its status can be tested using the
PLIB_I2C_ArbitrationLossHasOccurred function. This flag should be cleared by software after the arbitration loss has been
handled. To handle the error, the entire transmission (from the Start condition to the Stop or restart condition) must be retried
later when the bus becomes idle.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsArbitrationLoss in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_ArbitrationLossHasOccurred ( MY_I2C_ID ) )
{
// Handle bus collision
PLIB_I2C_ArbitrationLossClear ( MY_I2C_ID );
}
5.6.9.5.2.2 PLIB_I2C_ArbitrationLossHasOccurred Function
C
bool PLIB_I2C_ArbitrationLossHasOccurred(
I2C_MODULE_ID index
);
Description
This function identifies if bus arbitration has been lost.
Preconditions
Bus collisions can occur during any master-mode transmission including:
• Sending a Start condition
• Sending a repeated Start condition
• Sending an address or data byte
• sending an ACK/NAK bit
• Sending a Stop condition
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If software if a bus collision occurred, resulting in loss of bus arbitration
• false - If no bus collision occurred
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Remarks
The arbitration status should be checked after any Master mode transmission or if an error interrupt occurs. If a bus collision
occurs, the entire transmission (from the Start condition to the Stop or restart condition) must be retried later when the bus
becomes idle.
This flag should be cleared by software using the PLIB_I2C_ArbitrationLossClear function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsArbitrationLoss in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_ArbitrationLossHasOccurred ( MY_I2C_ID ) )
{
// Handle bus collision
PLIB_I2C_ArbitrationLossClear( MY_I2C_ID );
}
5.6.9.5.2.3 PLIB_I2C_BusIsIdle Function
C
bool PLIB_I2C_BusIsIdle(
I2C_MODULE_ID index
);
Description
This function checks to see if the I2C bus is currently idle or if there is some activity currently taking place.
Preconditions
The module must be configured appropriately and enabled.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - The bus is currently idle. It is safe to start a master transfer.
• false - The bus is currently busy. Do not start a master transfer.
Remarks
When this function returns true it does not guarantee that a bus arbitration loss cannot occur. Two or more masters can start a
transfer within the minimum start signal hold time. (Refer to the I2C specification for a definition of the minimum Start condition
hold time.)
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsBusIsIdle in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
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if (PLIB_I2C_BusIsIdle ( MY_I2C_ID ))
{
PLIB_I2C_MasterStart ( MY_I2C_ID );
}
5.6.9.5.2.4 PLIB_I2C_StartClear Function
C
void PLIB_I2C_StartClear(
I2C_MODULE_ID index
);
Description
This function clears the start status flag.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
This flag is cleared automatically by the hardware when a Stop condition is detected, but it can also be cleared by software.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsStartDetect in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_StartWasDetected( MY_I2C_ID ) )
{
// Handle Start condition
PLIB_I2C_StartClear(MY_I2C_ID);
}
5.6.9.5.2.5 PLIB_I2C_StartWasDetected Function
C
bool PLIB_I2C_StartWasDetected(
I2C_MODULE_ID index
);
Description
This function identifies when a Start condition has been detected.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - A Start Condition has been detected
• false - No Start condition has been detected since the last time a Stop condition was detected (or the module was initialized)
Remarks
This flag is cleared automatically by the hardware when a stop condition is detected, but it can also be cleared by software using
PLIB_I2C_StartClear function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsStartDetect in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_StartWasDetected ( MY_I2C_ID ) )
{
// Handle Start condition
}
5.6.9.5.2.6 PLIB_I2C_StopClear Function
C
void PLIB_I2C_StopClear(
I2C_MODULE_ID index
);
Description
This function clears the stop status flag.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
This flag is cleared automatically by the hardware when a Start condition is detected, but it can also be cleared by software.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsStopDetect in your application to determine whether this feature is available.
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Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_StopWasDetected ( MY_I2C_ID ) )
{
// Handle stop condition
PLIB_I2C_StopClear ( MY_I2C_ID );
}
5.6.9.5.2.7 PLIB_I2C_StopWasDetected Function
C
bool PLIB_I2C_StopWasDetected(
I2C_MODULE_ID index
);
Description
This function identifies when a Stop condition has been detected.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - A Stop condition has been detected
• false - No Stop condition has been detected since the last time a Start condition was detected (or the module was initialized)
Remarks
This flag is cleared automatically by the hardware when a Start condition is detected, but it can also be cleared by software using
the PLIB_I2C_StopClear function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsStopDetect in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_StopWasDetected ( MY_I2C_ID ) )
{
// Handle stop condition
}
5.6.9.5.3 Baud Rate Generator Control Functions
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5.6.9.5.3.1 PLIB_I2C_BaudRateGet Function
C
I2C_BAUD_RATE PLIB_I2C_BaudRateGet(
I2C_MODULE_ID index,
uint32_t clockFrequencyHz
);
Description
This function calculates the I2C module's current SCL clock frequency.
Preconditions
The returned value may not be valid if PLIB_I2C_BaudRateSet has not been previously called to set the SCL clock frequency.
Parameters
Parameters Description
index Identifies the desired I2C module
clockFrequencyHz Clock Frequency (Hz) provided for the I2C module
Returns
SCL frequency currently used
Remarks
The actual frequency provided may be slightly different than the frequency requested due to truncation errors. The actual
frequency observed on the SCL line may be lower due to clock stretching.
The MY_CLOCK_FREQUENCY macro in the example is used as placeholder for the actual clock frequency.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsBaudRate in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
#define MY_CLOCK_FREQ_INPUT 80000000
uint32_t myBaudRate;
myBaudRate = PLIB_I2C_BaudRateGet ( MY_I2C_ID, MY_CLOCK_FREQ_INPUT );
5.6.9.5.3.2 PLIB_I2C_BaudRateSet Function
C
void PLIB_I2C_BaudRateSet(
I2C_MODULE_ID index,
uint32_t clockFrequencyHz,
I2C_BAUD_RATE baudRate
);
Description
This function sets the desired baud rate so that the I2C module will operate at the desired clock frequency (on the SCL line of the
bus.)
Preconditions
The source clock, being sent to the I2C module (internal to the microcontroller) must be operating at the frequency passed.
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Parameters
Parameters Description
index Identifies the desired I2C module
clockFrequencyHz Clock Frequency (Hz)
baudRate The desired baud rate value. This should be an appropriate value for the
frequency and microcontroller in use.
Returns
None.
Remarks
IMPORTANT: The I2C module's high-frequency mode must be enabled for frequencies higher than 100 kHz using the
PLIB_I2C_HighFrequencyEnable function. Otherwise, the high-frequency mode must be disabled using the
PLIB_I2C_HighFrequencyDisable function.
The actual frequency selected may be slightly different than the frequency requested due to truncation errors. Use the
PLIB_I2C_BaudRateGet function to obtain the actual baud rate value that has been programmed.
The actual frequency observed on the SCL line may be lower due to clock stretching.
If the system clock is changed during an active receive operation, a receiver error or data loss may result. To avoid this issue,
verify that no receptions are in progress before changing the system clock.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsBaudRate in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
#define MY_CLOCK_FREQUENCY_INPUT 80000000
PLIB_I2C_HighFrequencyDisable ( MY_I2C_ID );
PLIB_I2C_BaudRateSet ( MY_I2C_ID, MY_CLOCK_FREQUENCY_INPUT, 40000 );
5.6.9.5.4 Slave Address Control Functions
5.6.9.5.4.1 PLIB_I2C_SlaveAddress10BitGet Function
C
uint16_t PLIB_I2C_SlaveAddress10BitGet(
I2C_MODULE_ID index
);
Description
This function identifies the 10-bit slave address to which the module will currently respond.
Preconditions
The address provided may not be valid if it has not been previously set.
Parameters
Parameters Description
index Identifies the desired I2C module
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Returns
The 10-bit slave address to which the mocule is currently set to respond.
Remarks
The 16-bit address will be right-aligned in the 16-bit return value.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveAddress10Bit in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint16_t slaveAddress;
if (PLIB_I2C_SlaveAddressModeIs10Bits ( MY_I2C_ID ) )
{
slaveAddress = PLIB_I2C_SlaveAddress10BitGet ( MY_I2C_ID );
}
5.6.9.5.4.2 PLIB_I2C_SlaveAddress10BitSet Function
C
void PLIB_I2C_SlaveAddress10BitSet(
I2C_MODULE_ID index,
uint16_t address
);
Description
This function selects 10-bit Slave mode addressing sets the slave address to which the module will respond when operating in
Slave mode.
Preconditions
None
Parameters
Parameters Description
index Identifies the desired I2C module
address The 10-bit slave address to which the module will respond (The address should be
right-aligned in the 16-bit parameter, without any read/write bit in the 0 position)
Returns
None.
Remarks
I2C modules on some microcontroller families may also support an address mask (to allow the module to respond to multiple
addresses. When using these microcontrollers, the PLIB_I2C_SlaveAddress10BitSetMasked may be used to support the mask
feature. Refer to the specific device data sheet to determine whether this feature is supported for your device.
The MY_SLAVE_ADDRESS_10_BIT macro in the example is used as a placeholder for the actual desired slave address.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveAddress10Bit in your application to determine whether this feature is available.
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Example
#define MY_I2C_ID I2C_ID_1
#define MY_SLAVE_ADDR_10_BIT 0x23
PLIB_I2C_SlaveAddress10BitSet ( MY_I2C_ID, MY_SLAVE_ADDR_10_BIT );
5.6.9.5.4.3 PLIB_I2C_SlaveAddress10BitWasDetected Function
C
bool PLIB_I2C_SlaveAddress10BitWasDetected(
I2C_MODULE_ID index
);
Description
This function detects if the second byte of a 10-bit slave address (containing the low-order 8 bits) matching the local address has
been received.
Preconditions
The module must have been configured for 10-bit addressing in Slave mode, enabled, and the first byte of the 10-bit local slave
address must have already been received and matched.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If the second byte of the local 10-bit address has been received
• false - If the second byte of the local 10-bit address has not been received
Remarks
This function should only be used by slave receivers.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveAddressDetect in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t i2cReadData;
if ( PLIB_I2C_SlaveAddress10BitWasDetected ( MY_I2C_ID ) )
{
i2cReadData = PLIB_I2C_ReceivedByteGet ( MY_I2C_ID );
}
5.6.9.5.4.4 PLIB_I2C_SlaveAddress7BitGet Function
C
uint8_t PLIB_I2C_SlaveAddress7BitGet(
I2C_MODULE_ID index
);
Description
This function identifies the 7-bit slave address to which the module will currently respond.
Preconditions
The address provided may not be valid if it has not been previously set.
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Parameters
Parameters Description
index Identifies the desired I2C module
Returns
The 7-bit slave address to which the module is currently set to respond.
Remarks
The 7-bit address will be right-aligned in the 8-bit return value.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveAddress7Bit in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t slave_address7bit;
if (!PLIB_I2C_SlaveAddressModeIs10Bits ( MY_I2C_ID ) )
{
slave_address7bit = PLIB_I2C_SlaveAddress7BitGet ( MY_I2C_ID );
}
5.6.9.5.4.5 PLIB_I2C_SlaveAddress7BitSet Function
C
void PLIB_I2C_SlaveAddress7BitSet(
I2C_MODULE_ID index,
uint8_t address
);
Description
This function selects 7-bit Slave mode addressing sets the address to which the module will respond when operating in Slave
mode.
Preconditions
None
Parameters
Parameters Description
index Identifies the desired I2C module
address The 7-bit slave address to which the module will respond (The address should be
right-aligned in the 8-bit parameter, without any read/write bit in the 0 position)
Returns
None.
Remarks
I2C modules on some microcontroller families may also support an address mask (to allow the module to respond to multiple
addresses. When using these microcontrollers, the PLIB_I2C_SlaveAddress7BitSetMasked may be used to support the mask
feature. Refer to the specific device data sheet to determine whether this feature is supported for your device.
The MY_SLAVE_ADDRESS_7_BIT macro in the example is used as a placeholder for the actual desired slave address.
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The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveAddress7Bit in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveAddress7BitSet ( MY_I2C_ID, MY_SLAVE_ADDRESS_7_BIT );
5.6.9.5.4.6 PLIB_I2C_SlaveAddressHoldDisable Function
C
void PLIB_I2C_SlaveAddressHoldDisable(
I2C_MODULE_ID index
);
Description
This function disables address holding.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_SlaveAddressHoldEnable in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveAddressHoldDisable ( MY_I2C_ID );
5.6.9.5.4.7 PLIB_I2C_SlaveAddressHoldEnable Function
C
void PLIB_I2C_SlaveAddressHoldEnable(
I2C_MODULE_ID index
);
Description
This function enables address holding. If address byte is received, following the 8th falling edge of clock for a clock line will be
held low.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_SlaveAddressHoldEnable in your application to determine whether this feature is available.
This API is applicable only in I2C slave mode.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveAddressHoldEnable ( MY_I2C_ID );
5.6.9.5.4.8 PLIB_I2C_SlaveAddressIsDetected Function
C
bool PLIB_I2C_SlaveAddressIsDetected(
I2C_MODULE_ID index
);
Description
This function identifies if the most recent byte received was a data byte or an address byte.
Preconditions
The module must have been configured appropriately and enabled, and a transfer must have been previously started.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If the byte received is an address byte
• false - If the byte received is a data byte
Remarks
This function should only be used by slave receivers.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveReadRequest in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t getData;
if ( PLIB_I2C_ReceivedByteIsAvailable ( MY_I2C_ID ) )
{
if ( PLIB_I2C_SlaveAddressIsDetected ( MY_I2C_ID ) )
{
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if ( PLIB_I2C_SlaveReadIsRequested ( MY_I2C_ID ) )
{
// Begin slave transamit mode
}
else
{
// Begin slave receive mode
}
}
// Read the data and release the bus
getData = PLIB_I2C_ReceivedByteGet ( MY_I2C_ID );
PLIB_I2C_SlaveClockRelease ( MY_I2C_ID );
}
5.6.9.5.4.9 PLIB_I2C_SlaveAddressIsGeneralCall Function
C
bool PLIB_I2C_SlaveAddressIsGeneralCall(
I2C_MODULE_ID index
);
Description
This function identifies if the current slave address received is the general call address.
Preconditions
A slave address must have been received.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If the slave address received is the general call address
• false - if the slave address received is not the general call address
Remarks
This bit is set when the general call address has been received.
This bit is automatically cleared by hardware when a Stop condition occurs and cannot be cleared by software.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsGeneralCallAddressDetect in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t slaveAddress7Bit;
if ( !PLIB_I2C_SlaveAddressModeIs10Bits ( MY_I2C_ID ) )
{
if ( PLIB_I2C_SlaveAddressIsGeneralCall( MY_I2C_ID ) )
{
// Handle general call address
}
slaveAddress7Bit = PLIB_I2C_SlaveAddress7BitGet ( MY_I2C_ID );
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}
5.6.9.5.4.10 PLIB_I2C_SlaveAddressModeIs10Bits Function
C
bool PLIB_I2C_SlaveAddressModeIs10Bits(
I2C_MODULE_ID index
);
Description
This function identifies if the current slave addressing mode is 7-bits or 10-bits.
Preconditions
The mode provided may not be valid if the address mode has not been previously set.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If the current slave addressing mode is 10-bits
• false - if the current slave addressing mode is 7-bits
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveAddress10Bit in your application to determine whether this feature is available.
Example
uint8_t slave_address7Bit;
uint16_t slave_address10Bit;
if ( PLIB_I2C_SlaveAddressModeIs10Bits ( MY_I2C_ID ) )
{
slave_address10Bit = PLIB_I2C_SlaveAddress10BitGet ( MY_I2C_ID );
}
else
{
slave_address7Bit = PLIB_I2C_SlaveAddress7BitGet ( MY_I2C_ID );
}
5.6.9.5.4.11 PLIB_I2C_SlaveDataIsDetected Function
C
bool PLIB_I2C_SlaveDataIsDetected(
I2C_MODULE_ID index
);
Description
This function identifies if the most recent byte received was a data byte or an address byte.
Preconditions
The module must have been configured appropriately and enabled, and a transfer must have been previously started.
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Parameters
Parameters Description
index Identifies the desired I2C module.
Returns
• true - If the byte received is a data byte
• false - If the byte received is an address byte
Remarks
This function should only be used by slave receivers.
This function returns the opposite of the PLIB_I2C_SlaveAddressIsDetected function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveDataDetect in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t dataReceived;
if ( PLIB_I2C_ReceivedByteIsAvailable ( MY_I2C_ID ) )
{
if ( PLIB_I2C_SlaveDataIsDetected( MY_I2C_ID ) )
{
// Read the data and release the bus
dataReceived = PLIB_I2C_ReceivedByteGet ( MY_I2C_ID );
PLIB_I2C_SlaveClockRelease ( MY_I2C_ID );
}
}
5.6.9.5.4.12 PLIB_I2C_SlaveReadIsRequested Function
C
bool PLIB_I2C_SlaveReadIsRequested(
I2C_MODULE_ID index
);
Description
This function identifies if a slave read (transmit) or a slave write (receive) was requested by the master that addressed the
module.
Preconditions
The module must have been configured appropriately and enabled, and a transfer must have been previously started.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If an external master is requesting data (slave read/transmit)
• false - If an external master is sending data (slave write/receive)
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Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveReadRequest in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t slaveTxData;
uint8_t slaveRxData;
if ( PLIB_I2C_SlaveReadIsRequested ( MY_I2C_ID ) )
{
if ( PLIB_I2C_TransmitterIsReady ( MY_I2C_ID ) )
{
PLIB_I2C_TransmitterByteSend ( MY_I2C_ID, slaveTxData );
}
}
else
{
slaveRxData = PLIB_I2C_ReceivedByteGet ( MY_I2C_ID );
}
5.6.9.5.5 Slave Mask Control Functions
5.6.9.5.5.1 PLIB_I2C_SlaveMask10BitGet Function
C
uint16_t PLIB_I2C_SlaveMask10BitGet(
I2C_MODULE_ID index
);
Description
This function identifies the 10-bit slave address mask that is currently being used to determine which slave addresses the
module will respond.
Preconditions
The address mask provided may not be valid if it has not been previously been set.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
The 10-bit slave address mask that the module is currenty using to determine to which addresses the module will respond.
Remarks
The 10-bit address mask will be Right-aligned in the 16-bit return value.
This function is not supported on microcontrollers with I2C modules that do not support the slave address mask feature. Refer to
the specific device data sheet to determine whether this feature is supported for your device.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_I2C_ExistsSlaveMask in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint16_t slave_address;
uint16_t slave_addressMask;
if ( PLIB_I2C_SlaveAddressModeIs10Bits ( MY_I2C_ID ) )
{
slave_address = PLIB_I2C_SlaveAddress10BitGet ( MY_I2C_ID );
slave_addressMask = PLIB_I2C_SlaveMask10BitGet ( MY_I2C_ID );
}
5.6.9.5.5.2 PLIB_I2C_SlaveMask10BitSet Function
C
void PLIB_I2C_SlaveMask10BitSet(
I2C_MODULE_ID index,
uint16_t mask
);
Description
This function sets the 10-bit mask for Slave mode addressing. The address mask (if supported) is used, along with the slave
address to identify to which addresses the module will respond when operating in Slave mode. It acts as an "ignore" mask,
allowing the module to ignore bits within the slave address and thus respond to multiple slave addresses on microcontrollers with
I2C modules that support the mask feature.
Preconditions
None
Parameters
Parameters Description
index Identifies the desired I2C module
mask This parameter identifies bits in the address that are "don't care" bits. These bits
will be ignored when attempting to match the address, effectively allowing the
module to recognize multiple slave addresses. (To match an address exactly, this
value must be zero (0).) (This value must
also be right
aligned in the 16-bit parameter.)
Returns
None.
Remarks
I2C modules on some microcontroller families may not support the mask feature, in which case the
PLIB_I2C_SlaveMask10BitSet function will not be supported. Refer to the specific device data sheet to determine whether his
feature is supported for your device.
The MY_SLAVE_ADDRESS_10_BIT and MY_SLAVE_ADDRESS_MASK_10_BIT macros in the example code are used as
placeholders for the actual desired slave address and mask that must be filled in by the caller.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveMask in your application to determine whether this feature is available.
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Example
#define MY_I2C_ID I2C_ID_1
#define MY_SLAVE_ADDR_10_BIT 0x23
#define MY_SLAVE_ADDR_MASK_10_BIT 0x12
PLIB_I2C_SlaveAddress10BitSet ( MY_I2C_ID, MY_SLAVE_ADDR_10_BIT );
PLIB_I2C_SlaveMask10BitSet ( MY_I2C_ID, MY_SLAVE_ADDR_MASK_10_BIT );
5.6.9.5.5.3 PLIB_I2C_SlaveMask7BitGet Function
C
uint8_t PLIB_I2C_SlaveMask7BitGet(
I2C_MODULE_ID index
);
Description
This function identifies the 7-bit Slave mode address mask that is currently being used to determine which slave addresses the
module will respond.
Preconditions
The address mask provided may not be valid if it has not been previously been set.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
The 7-bit Slave mode address mask that the module is currenty using to determine to which addresses the module will respond.
Remarks
The 7-bit address mask will be right-aligned in the 8-bit return value.
This function is not supported on microcontrollers with I2C modules that do not support the slave address mask feature. Refer to
the specific device data sheet to determine whether this feature is supported for your device.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveMask in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t slaveAddr;
uint8_t slaveAddressMsk;
if ( !PLIB_I2C_SlaveAddressModeIs10Bits ( MY_I2C_ID ) )
{
slaveAddr = PLIB_I2C_SlaveAddress7BitGet ( MY_I2C_ID );
slaveAddressMsk = PLIB_I2C_SlaveMask7BitGet ( MY_I2C_ID );
}
5.6.9.5.5.4 PLIB_I2C_SlaveMask7BitSet Function
C
void PLIB_I2C_SlaveMask7BitSet(
I2C_MODULE_ID index,
uint8_t mask
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);
Description
This function sets the 7-bit mask for Slave mode addressing. The address mask (if supported) is used, along with the slave
address to identify to which addresses the module will respond when operating in Slave mode. It acts as an "ignore" mask,
allowing the module to ignore bits within the slave address and will respond to multiple slave addresses on microcontrollers with
I2C modules that support the mask feature.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
mask This parameter identifies bits in the address that are "don't care" bits. These bits
will be ignored when attempting to match the address, effectively allowing the
module to recognize multiple slave addresses. (To match an address exactly, this
parameter must be zero (0).)
Returns
None.
Remarks
I2C modules on some microcontroller families may not support the mask feature, in which case the PLIB_I2C_SlaveMask7BitSet
function will not be supported. Refer to the specific device data sheet to determine whether this feature is supported for your
device.
The MY_SLAVE_ADDRESS_7_BIT and MY_SLAVE_ADDRESS_MASK_7_BIT macros in the example code are used as
placeholders for the actual desired slave address and mask that must be filled in by the caller.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveMask in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
#define MY_SLAVE_ADDR_7_BIT 0x23
#define MY_SLAVE_ADDR_MASK_7_BIT 0x12
PLIB_I2C_SlaveAddress7BitSet ( MY_I2C_ID, MY_SLAVE_ADDR_7_BIT );
PLIB_I2C_SlaveMask7BitSet ( MY_I2C_ID, MY_SLAVE_ADDR_MASK_7_BIT );
5.6.9.5.6 Slave Control Functions
5.6.9.5.6.1 PLIB_I2C_AcksequenceIsInProgress Function
C
bool PLIB_I2C_AcksequenceIsInProgress(
I2C_MODULE_ID index
);
Description
This function checks whether the acknowledge sequence is in progress or it is completed.
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Preconditions
The module must have been configured appropriately and enabled.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
true - Acknowledge sequence is in progress. false - Acknowledge sequence is not started or completed.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsAcksequenceProgress in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_AcksequenceIsInProgress ( MY_I2C_ID ) )
{
//Transmission completed
}
5.6.9.5.6.2 PLIB_I2C_DataLineHoldTimeSet Function
C
void PLIB_I2C_DataLineHoldTimeSet(
I2C_MODULE_ID index,
I2C_SDA_MIN_HOLD_TIME sdaHoldTimeNs
);
Description
This function sets the data line hold time.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module.
sdaHoldTimeNs SDA hold time in nano secconds.
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsDataLineHoldTime in your application to determine whether this feature is available.
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Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_PLIB_I2C_DataLineHoldTimeSet ( MY_I2C_ID, I2C_SDA_MIN_HOLD_TIME_300NS );
5.6.9.5.6.3 PLIB_I2C_SlaveBufferOverwriteDisable Function
C
void PLIB_I2C_SlaveBufferOverwriteDisable(
I2C_MODULE_ID index
);
Description
This function disables buffer overwrite. If the buffer overwrite is disabled, on data receive, when the previous data is not read, the
buffer will not be overwritten.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveBufferOverwrite in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveBufferOverwriteDisable ( MY_I2C_ID );
5.6.9.5.6.4 PLIB_I2C_SlaveBufferOverwriteEnable Function
C
void PLIB_I2C_SlaveBufferOverwriteEnable(
I2C_MODULE_ID index
);
Description
This function enables buffer overwrite. If the buffer overwrite is enabled, on data receive, even if the previous data is not read,
the buffer will be filled with new data and acknowledge will be generated.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
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Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveBufferOverwrite in your application to determine whether this feature is available.
This API is applicable only in I2C slave mode.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveBufferOverwriteEnable ( MY_I2C_ID );
5.6.9.5.6.5 PLIB_I2C_SlaveBusCollisionDetectDisable Function
C
void PLIB_I2C_SlaveBusCollisionDetectDisable(
I2C_MODULE_ID index
);
Description
This function disables bus collision detect interrupts.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_SlaveBusCollisionDetect in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveBusCollisionDetectDisable ( MY_I2C_ID );
5.6.9.5.6.6 PLIB_I2C_SlaveBusCollisionDetectEnable Function
C
void PLIB_I2C_SlaveBusCollisionDetectEnable(
I2C_MODULE_ID index
);
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Description
This function enables bus collision interrupts.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_SlaveBusCollisionDetect in your application to determine whether this feature is available.
This API is applicable only in I2C slave mode.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveAddressHoldEnable ( MY_I2C_ID );
5.6.9.5.6.7 PLIB_I2C_SlaveClockHold Function
C
void PLIB_I2C_SlaveClockHold(
I2C_MODULE_ID index
);
Description
This function allows an I2C slave to stretch the SCL clock line, holding it low to throttle data transfer from a master transmitter.
Preconditions
The module must have been configured appropriately and enabled, and a transfer must have been previously started by an
external master.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
This function will cause the SCL line to be forced low, after the current byte has been fully received.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_I2C_ExistsSlaveClockHold in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveClockHold ( MY_I2C_ID );
5.6.9.5.6.8 PLIB_I2C_SlaveClockRelease Function
C
void PLIB_I2C_SlaveClockRelease(
I2C_MODULE_ID index
);
Description
This function allows a slave receiver to release a previously held SCL clock line, allowing it to go high and allowing data transfer
to continue.
Preconditions
The module must have been configured appropriately and enabled, and a transfer must have been previously started by an
external master, and the SCL clock line should have been previously held (forced low) by the I2C module.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
Calling this function when the clock has not been held will not cause any problems.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveClockHold in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveClockRelease ( MY_I2C_ID );
5.6.9.5.6.9 PLIB_I2C_SlaveDataHoldDisable Function
C
void PLIB_I2C_SlaveDataHoldDisable(
I2C_MODULE_ID index
);
Description
This function disables data holding.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_SlaveDataHoldEnable in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveDataHoldDisable ( MY_I2C_ID );
5.6.9.5.6.10 PLIB_I2C_SlaveDataHoldEnable Function
C
void PLIB_I2C_SlaveDataHoldEnable(
I2C_MODULE_ID index
);
Description
This function enables data holding. If a data byte is received, following the 8th falling edge of clock for a clock line will be held
low.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_SlaveDataHoldEnable in your application to determine whether this feature is available.
This API is supported only for the slave mode of I2C.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveDataHoldEnable ( MY_I2C_ID );
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5.6.9.5.6.11 PLIB_I2C_SlaveInterruptOnStartDisable Function
C
void PLIB_I2C_SlaveInterruptOnStartDisable(
I2C_MODULE_ID index
);
Description
This function disables the featue of generating interrupt on start condition.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveInterruptOnStart in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveInterruptOnStartDisable ( MY_I2C_ID );
5.6.9.5.6.12 PLIB_I2C_SlaveInterruptOnStartEnable Function
C
void PLIB_I2C_SlaveInterruptOnStartEnable(
I2C_MODULE_ID index
);
Description
This function enables the featue of generating interrupt on start condition.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
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This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveInterruptOnStart in your application to determine whether this feature is available.
This API is applicable only in I2C slave mode.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveInterruptOnStartEnable ( MY_I2C_ID );
5.6.9.5.6.13 PLIB_I2C_SlaveInterruptOnStopDisable Function
C
void PLIB_I2C_SlaveInterruptOnStopDisable(
I2C_MODULE_ID index
);
Description
This function disables the featue of generating interrupt on stop condition.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveInterruptOnStop in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveInterruptOnStopDisable ( MY_I2C_ID );
5.6.9.5.6.14 PLIB_I2C_SlaveInterruptOnStopEnable Function
C
void PLIB_I2C_SlaveInterruptOnStopEnable(
I2C_MODULE_ID index
);
Description
This function enables the featue of generating interrupt on stop condition.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsSlaveInterruptOnStop in your application to determine whether this feature is available.
This API is applicable only in I2C slave mode.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_SlaveInterruptOnStopEnable ( MY_I2C_ID );
5.6.9.5.7 Master Control Functions
5.6.9.5.7.1 PLIB_I2C_MasterReceiverClock1Byte Function
C
void PLIB_I2C_MasterReceiverClock1Byte(
I2C_MODULE_ID index
);
Description
This function drives the bus clock to receive 1 byte of data from a slave device.
Preconditions
The module must have been configured appropriately and enabled, a transfer must have been previously started, and the
module must be the intended receiver of the next byte of data.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
The module stops driving the bus clock after the reception of a single byte of data and this function must be called again to
receive another byte.
After the module has finished receiving a data byte (determined by responding to an I2C master interrupt and/or by checking the
PLIB_I2C_ReceivedByteIsAvailable function), software should check the PLIB_I2C_ReceiverOverflowHasOccurred function to
ensure that no data was lost because the receiver buffer was full when the byte was completely received and ready to be placed
into the receiver buffer.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
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processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsMasterReceiverClock1Byte in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_MasterReceiverClock1Byte ( MY_I2C_ID );
5.6.9.5.7.2 PLIB_I2C_MasterStart Function
C
void PLIB_I2C_MasterStart(
I2C_MODULE_ID index
);
Description
This function sends the start signal (a falling edge on SDA while SCL is high) to start a transfer on the I2C bus when acting in
Master mode.
Preconditions
The module must have been configured appropriately and enabled and the I2C bus must currently be idle.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
Only an I2C master can start a transfer on the bus. The bus is considered to be busy after a Start condition.
After the Start condition has completed (detected by responding to the I2C master interrupt), software should check for
arbitration loss by calling the PLIB_I2C_ArbitrationLossHasOccurred function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsMasterStart in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_BusIsIdle ( MY_I2C_ID ) )
{
PLIB_I2C_MasterStart ( MY_I2C_ID );
}
5.6.9.5.7.3 PLIB_I2C_MasterStartRepeat Function
C
void PLIB_I2C_MasterStartRepeat(
I2C_MODULE_ID index
);
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Description
This function supports sending a repeated Start condition to change slave targets or transfer direction to support certain I2C
transfer formats in Master mode.
Preconditions
The module must have been configured appropriately and enabled, and a transfer must have been previously started.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
Only an I2C master that has already started a transfer can send a repeated Start condition.
After the repeated-start condition has completed (detected by responding to the I2C master interrupt), software should check for
arbitration loss by the PLIB_I2C_ArbitrationLossHasOccurred function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsMasterStartRepeat in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_MasterStartRepeat ( MY_I2C_ID );
5.6.9.5.7.4 PLIB_I2C_MasterStop Function
C
void PLIB_I2C_MasterStop(
I2C_MODULE_ID index
);
Description
This function sends the stop signal (a rising edge on SDA while SCL is high) on the I2C bus, to end a transfer on the I2C bus
when in Master mode.
Preconditions
The module must have been configured appropriately, enabled, and a previously started transfer must be completed.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
Only an I2C master that has already started a transfer can send a Stop condition.
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The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsMasterStop in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
PLIB_I2C_MasterStop ( MY_I2C_ID );
5.6.9.5.8 Transmitter Control Functions
5.6.9.5.8.1 PLIB_I2C_TransmitterByteHasCompleted Function
C
bool PLIB_I2C_TransmitterByteHasCompleted(
I2C_MODULE_ID index
);
Description
This function determines if the transmitter has finished sending the most recently sent byte on the I2C bus.
Preconditions
The module must have been configured appropriately and enabled, a transfer must have been previously started, and a data or
address byte must have been sent.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If the transmitter has completed sending the data byte
• false - If the transmitter is still busy sending the data byte
Remarks
This function should be used by both master and slave transmitters.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsTransmitterByteComplete in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_TransmitterByteHasCompleted ( MY_I2C_ID ) )
{
//Transmission completed
}
5.6.9.5.8.2 PLIB_I2C_TransmitterByteSend Function
C
void PLIB_I2C_TransmitterByteSend(
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I2C_MODULE_ID index,
uint8_t data
);
Description
This function allows the caller to send a byte of data on the I2C bus.
Preconditions
The module must have been configured appropriately and enabled, a transfer must have been previously started, and the I2C
module's transmitter must be ready to accept a byte of data to send.
Parameters
Parameters Description
index Identifies the desired I2C module
data Data byte to send on the I2C bus
Returns
None.
Remarks
This function should be used by both master and slave transmitters.
The caller must either first call the PLIB_I2C_TransmitterIsReady function before calling this function to ensure that the
transmitter is ready to receive a new byte to transmit or call the PLIB_I2C_TransmitterOverflowHasOccurred function
immediately after calling this function to ensure that a transmitter write collision did not occur.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsTransmitterByteSend in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t transmitData;
//set 'transmitData' variable
if ( PLIB_I2C_TransmitterIsReady ( MY_I2C_ID ) )
{
PLIB_I2C_TransmitterByteSend ( MY_I2C_ID, transmitData );
}
5.6.9.5.8.3 PLIB_I2C_TransmitterByteWasAcknowledged Function
C
bool PLIB_I2C_TransmitterByteWasAcknowledged(
I2C_MODULE_ID index
);
Description
This function allows a transmitter to determine if the byte just sent was positively acknowledged (ACKed) or negatively
acknowledged (NAKed) by the receiver.
Preconditions
The module must have been configured appropriately and enabled, a transfer must have been previously started, a byte of data
must have been sent on the I2C bus, and the transmission must have completed.
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Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If the receiver ACKed the byte
• false - If the receiver NAKed the byte
Remarks
This function can be used by both master or slave transmitters.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsTransmitterByteAcknowledge in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_TransmitterByteHasCompleted ( MY_I2C_ID ) )
{
if ( PLIB_I2C_TransmitterByteWasAcknowledged ( MY_I2C_ID ) )
{
// transmission successful
}
}
5.6.9.5.8.4 PLIB_I2C_TransmitterIsBusy Function
C
bool PLIB_I2C_TransmitterIsBusy(
I2C_MODULE_ID index
);
Description
This function identifies if the transmitter of the specified I2C module is currently busy (unable to accept more data).
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
true - The transmitter is busy (unable to accept new data)
false - The transmitter is ready (able to accept new data)
Remarks
This function returns the inverse of the PLIB_I2C_TransmitterIsReady function.
This flag is cleared automatically by the hardware when the transmitter is ready. It cannot be cleared by software.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
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This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsTransmitterIsBusy in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t transData;
//set 'transData' variable
if ( !PLIB_I2C_TransmitterIsBusy( MY_I2C_ID ) )
{
PLIB_I2C_TransmitterByteSend( MY_I2C_ID, transData );
}
5.6.9.5.8.5 PLIB_I2C_TransmitterIsReady Function
C
bool PLIB_I2C_TransmitterIsReady(
I2C_MODULE_ID index
);
Description
This function determines if the transmitter is ready to accept more data to be transmitted on the I2C bus.
Preconditions
The module must have been configured appropriately, enabled, and a transfer must have been previously started.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If the transmitter is ready to accept more data
• false - If the transmitter is not ready to accept more data
Remarks
This function should be used by both master and slave transmitters.
This function returns the inverse of the PLIB_I2C_TransmitterIsBusy function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsTransmitterIsBusy in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t sendData;
//set 'sendData' variable
if ( PLIB_I2C_TransmitterIsReady ( MY_I2C_ID ) )
{
PLIB_I2C_TransmitterByteSend ( MY_I2C_ID, sendData );
}
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5.6.9.5.8.6 PLIB_I2C_TransmitterOverflowClear Function
C
void PLIB_I2C_TransmitterOverflowClear(
I2C_MODULE_ID index
);
Description
This function clears the transmitter overflow status flag.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
This flag is set by hardware when an overflow error occurs. It's status can be tested using the
PLIB_I2C_TransmitterOverflowHasOccurred function. This flag must be cleared be cleared by software after the overflow error
has been handled. To handle the error, software must retry the write later after the PLIB_I2C_TransmitterByteSend function
returns TRUE.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsTransmitterOverflow in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t my_data;
//set 'my_data' variable
PLIB_I2C_TransmitterByteSend ( MY_I2C_ID, my_data );
if ( PLIB_I2C_TransmitterOverflowHasOccurred ( MY_I2C_ID ) )
{
// Handle overflow error
PLIB_I2C_TransmitterOverflowClear ( MY_I2C_ID );
}
5.6.9.5.8.7 PLIB_I2C_TransmitterOverflowHasOccurred Function
C
bool PLIB_I2C_TransmitterOverflowHasOccurred(
I2C_MODULE_ID index
);
Description
This function identifies if a transmitter overflow error has occurred.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired I2C module
Returns
true - If software attempted to write a byte to the transmitter buffer while the transmitter was busy and unable to accept a new
byte (i.e., the write will not occur)
false - If no transmitter overflow occurred when software attempted to write a byte to the transmitter buffer (i.e., the write
occurred successfully)
Remarks
This flag must be cleared be cleared by software using the PLIB_I2C_TransmitterOverflowClear function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsTransmitterOverflow in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t txData;
//set 'txData' variable
PLIB_I2C_TransmitterByteSend ( MY_I2C_ID, txData );
if ( PLIB_I2C_TransmitterOverflowHasOccurred ( MY_I2C_ID ) )
{
// Handle overflow error
PLIB_I2C_TransmitterOverflowClear ( MY_I2C_ID );
}
5.6.9.5.9 Receiver Control Functions
5.6.9.5.9.1 PLIB_I2C_ReceivedByteAcknowledge Function
C
void PLIB_I2C_ReceivedByteAcknowledge(
I2C_MODULE_ID index,
bool ack
);
Description
This function allows a receiver to positively acknowledge (ACK) or negatively acknowledge (NAK) a byte of data that has been
received from the I2C bus.
Preconditions
The module must have been configured appropriately and enabled, a transfer must have been previously started, and a byte of
data must have been received from the I2C bus.
Parameters
Parameters Description
index Identifies the desired I2C module
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5.6.9.5.9.2 PLIB_I2C_ReceivedByteGet Function
C
uint8_t PLIB_I2C_ReceivedByteGet(
I2C_MODULE_ID index
);
Description
This function allows the caller to read a byte of data received from the I2C bus.
Preconditions
The module must have been configured appropriately and enabled, a transfer must have been previously started, and a byte of
data must have been received from the I2C bus.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
A byte of data received from the I2C bus.
Remarks
This function should be used by both master and slave receivers.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsReceivedByteGet in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t receivedData;
if ( PLIB_I2C_ReceivedByteIsAvailable ( MY_I2C_ID ) )
{
PLIB_I2C_ReceivedByteAcknowledge ( MY_I2C_ID, true );
receivedData = PLIB_I2C_ReceivedByteGet ( MY_I2C_ID );
}
5.6.9.5.9.3 PLIB_I2C_ReceivedByteIsAvailable Function
C
bool PLIB_I2C_ReceivedByteIsAvailable(
I2C_MODULE_ID index
);
Description
This function determines if the receiver has data available to be read by software.
Preconditions
The I2C module must have been configured appropriately and enabled, and a transfer must have been previously started.
Parameters
Parameters Description
index Identifies the desired I2C module
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Returns
• true - If the receiver has data available
• false - If the receiver does not have data available
Remarks
This function should be used by both master and slave receivers.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsReceivedByteAvailable in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t readData;
if ( PLIB_I2C_ReceivedByteIsAvailable ( MY_I2C_ID ) )
{
readData = PLIB_I2C_ReceivedByteGet ( MY_I2C_ID );
}
5.6.9.5.9.4 PLIB_I2C_ReceiverByteAcknowledgeHasCompleted Function
C
bool PLIB_I2C_ReceiverByteAcknowledgeHasCompleted(
I2C_MODULE_ID index
);
Description
This function allows the receiver to determine if the acknowledgment signal has completed.
Preconditions
The module must have been configured appropriately and enabled, a transfer must have been previously started, a byte of data
must have been received on the I2C bus, and the acknowledgement must have been started (by calling the
PLIB_I2C_ReceivedByteAcknowledge function).
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If the acknowledgment has completed
• false - If the acknowledgment has not completed
Remarks
This function can only be used by master receivers. Slave receivers automatically ACK or NAK bytes.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsReceivedByteAcknowledge in your application to determine whether this feature is available.
Example
PLIB_I2C_ReceivedByteAcknowledge ( MY_I2C_ID, true );
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if ( PLIB_I2C_ReceiverByteAcknowledgeHasCompleted ( MY_I2C_ID ) )
{
// acknowledgment completed
}
5.6.9.5.9.5 PLIB_I2C_ReceiverOverflowClear Function
C
void PLIB_I2C_ReceiverOverflowClear(
I2C_MODULE_ID index
);
Description
This function clears the receiver overflow status flag.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
None.
Remarks
This flag is set by hardware when an overflow error occurs. It's status can be tested using the
PLIB_I2C_ReceiverOverflowHasOccurred function. This flag should be cleared be cleared by software after the overflow error
has been handled by reading the byte in the receiver buffer.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsReceiverOverflow in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_ReceiverOverflowHasOccurred ( MY_I2C_ID ) )
{
// Handle overflow error
PLIB_I2C_ReceiverOverflowClear ( MY_I2C_ID );
}
5.6.9.5.9.6 PLIB_I2C_ReceiverOverflowHasOccurred Function
C
bool PLIB_I2C_ReceiverOverflowHasOccurred(
I2C_MODULE_ID index
);
Description
This function identifies if a receiver overflow error has occurred.
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Preconditions
None.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If a byte was received while the receiver buffer still held a previously received byte (The new byte will be lost)
• false - If no receiver overflow occurred when a byte has been received
Remarks
This flag should be cleared be cleared by software using the PLIB_I2C_ReceiverOverflowClear function.
The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsReceiverOverflow in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
if ( PLIB_I2C_ReceiverOverflowHasOccurred ( MY_I2C_ID ) )
{
// Handle overflow error
PLIB_I2C_ReceiverOverflowClear ( MY_I2C_ID );
}
5.6.9.5.9.7 PLIB_I2C_MasterReceiverReadyToAcknowledge Function
C
bool PLIB_I2C_MasterReceiverReadyToAcknowledge(
I2C_MODULE_ID index
);
Description
This function checks for preconditions before acknowledging a slave.
Preconditions
The module must have been configured appropriately and enabled, a transfer must have been previously started and a byte of
data must have been received from the I2C bus.
Parameters
Parameters Description
index Identifies the desired I2C module
Returns
• true - If the hardware status is ready to acknowledge
• false - If the hardware is not ready to acknowledge
Remarks
This function can only be used by master receivers.
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The MY_I2C_ID macro in the example above is used as a placeholder for the actual I2C bus ID (as defined by the
processor-specific I2C_MODULE_ID enum).
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_I2C_ExistsReceivedByteAcknowledge in your application to determine whether this feature is available.
Example
#define MY_I2C_ID I2C_ID_1
uint8_t data;
if ( PLIB_I2C_ReceivedByteIsAvailable ( MY_I2C_ID ) )
{
if ( PLIB_I2C_MasterReceiverReadyToAcknowledge ( MY_I2C_ID ) )
{
PLIB_I2C_ReceivedByteAcknowledge ( MY_I2C_ID, true );
data = PLIB_I2C_ReceivedByteGet ( MY_I2C_ID );
}
}
5.6.9.5.10 Existence Functions
5.6.9.5.10.1 PLIB_I2C_ExistsAcksequenceProgress Function
C
bool PLIB_I2C_ExistsAcksequenceProgress(
I2C_MODULE_ID index
);
Description
This function identifies whether the AcksequenceIsInProgress feature is available on the I2C module. When this function returns
true, these functions are supported on the device:
• PLIB_I2C_AcksequenceIsInProgress
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the AcksequenceIsInProgress feature is supported on the device
• false - If the AcksequenceIsInProgress feature is not supported on the device
Remarks
None.
5.6.9.5.10.2 PLIB_I2C_ExistsArbitrationLoss Function
C
bool PLIB_I2C_ExistsArbitrationLoss(
I2C_MODULE_ID index
);
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Description
This function identifies whether the ArbitrationLoss feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_ArbitrationLossHasOccurred
• PLIB_I2C_ArbitrationLossClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ArbitrationLoss feature is supported on the device
• false - If the ArbitrationLoss feature is not supported on the device
Remarks
None.
5.6.9.5.10.3 PLIB_I2C_ExistsBaudRate Function
C
bool PLIB_I2C_ExistsBaudRate(
I2C_MODULE_ID index
);
Description
This function identifies whether the BaudRate feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_BaudRateSet
• PLIB_I2C_BaudRateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the BaudRate feature is supported on the device
• false - If the BaudRate feature is not supported on the device
Remarks
None.
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5.6.9.5.10.4 PLIB_I2C_ExistsBusIsIdle Function
C
bool PLIB_I2C_ExistsBusIsIdle(
I2C_MODULE_ID index
);
Description
This function identifies whether the BusIdle feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_BusIsIdle
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the BusIdle feature is supported on the device
• false - If the BusIdle feature is not supported on the device
Remarks
None.
5.6.9.5.10.5 PLIB_I2C_ExistsClockStretching Function
C
bool PLIB_I2C_ExistsClockStretching(
I2C_MODULE_ID index
);
Description
This function identifies whether the ClockStretching feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_SlaveClockStretchingEnable
• PLIB_I2C_SlaveClockStretchingDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ClockStretching feature is supported on the device
• false - If the ClockStretching feature is not supported on the device
Remarks
None.
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5.6.9.5.10.6 PLIB_I2C_ExistsDataLineHoldTime Function
C
bool PLIB_I2C_ExistsDataLineHoldTime(
I2C_MODULE_ID index
);
Description
This function identifies whether the DataLineHoldTime feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_DataLineHoldTimeSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the DataLineHoldTime feature is supported on the device
• false - If the DataLineHoldTime feature is not supported on the device
Remarks
None.
5.6.9.5.10.7 PLIB_I2C_ExistsGeneralCall Function
C
bool PLIB_I2C_ExistsGeneralCall(
I2C_MODULE_ID index
);
Description
This function identifies whether the GeneralCall feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_GeneralCallEnable
• PLIB_I2C_GeneralCallDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the GeneralCall feature is supported on the device
• false - If the GeneralCall feature is not supported on the device
Remarks
None.
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5.6.9.5.10.8 PLIB_I2C_ExistsGeneralCallAddressDetect Function
C
bool PLIB_I2C_ExistsGeneralCallAddressDetect(
I2C_MODULE_ID index
);
Description
This function identifies whether the GeneralCallAddressDetect feature is available on the I2C module. When this function returns
true, these functions are supported on the device:
• PLIB_I2C_SlaveAddressIsGeneralCall
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the GeneralCallAddressDetect feature is supported on the device
• false - If the GeneralCallAddressDetect feature is not supported on the device
Remarks
None.
5.6.9.5.10.9 PLIB_I2C_ExistsHighFrequency Function
C
bool PLIB_I2C_ExistsHighFrequency(
I2C_MODULE_ID index
);
Description
This function identifies whether the HighFrequency feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_HighFrequencyEnable
• PLIB_I2C_HighFrequencyDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the HighFrequency feature is supported on the device
• false - If the HighFrequency feature is not supported on the device
Remarks
None.
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5.6.9.5.10.10 PLIB_I2C_ExistsIPMI Function
C
bool PLIB_I2C_ExistsIPMI(
I2C_MODULE_ID index
);
Description
This function identifies whether the IPMI feature is available on the I2C module. When this function returns true, these functions
are supported on the device:
• PLIB_I2C_IPMIEnable
• PLIB_I2C_IPMIDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the IPMI feature is supported on the device
• false - If the IPMI feature is not supported on the device
Remarks
None.
5.6.9.5.10.11 PLIB_I2C_ExistsMasterReceiverClock1Byte Function
C
bool PLIB_I2C_ExistsMasterReceiverClock1Byte(
I2C_MODULE_ID index
);
Description
This function identifies whether the MasterReceiverClock1Byte feature is available on the I2C module. When this function returns
true, these functions are supported on the device:
• PLIB_I2C_MasterReceiverClock1Byte
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the MasterReceiverClock1Byte feature is supported on the device
• false - If the MasterReceiverClock1Byte feature is not supported on the device
Remarks
None.
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5.6.9.5.10.12 PLIB_I2C_ExistsMasterStart Function
C
bool PLIB_I2C_ExistsMasterStart(
I2C_MODULE_ID index
);
Description
This function identifies whether the MasterStart feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_MasterStart
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the MasterStart feature is supported on the device
• false - If the MasterStart feature is not supported on the device
Remarks
None.
5.6.9.5.10.13 PLIB_I2C_ExistsMasterStartRepeat Function
C
bool PLIB_I2C_ExistsMasterStartRepeat(
I2C_MODULE_ID index
);
Description
This function identifies whether the MasterStartRepeat feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_MasterStartRepeat
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the MasterStartRepeat feature is supported on the device
• false - If the MasterStartRepeat feature is not supported on the device
Remarks
None.
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5.6.9.5.10.14 PLIB_I2C_ExistsMasterStop Function
C
bool PLIB_I2C_ExistsMasterStop(
I2C_MODULE_ID index
);
Description
This function identifies whether the MasterStop feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_MasterStop
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the MasterStop feature is supported on the device
• false - If the MasterStop feature is not supported on the device
Remarks
None.
5.6.9.5.10.15 PLIB_I2C_ExistsModuleEnable Function
C
bool PLIB_I2C_ExistsModuleEnable(
I2C_MODULE_ID index
);
Description
This function identifies whether the ModuleEnable feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_Enable
• PLIB_I2C_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ModuleEnable feature is supported on the device
• false - If the ModuleEnable feature is not supported on the device
Remarks
None.
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5.6.9.5.10.16 PLIB_I2C_ExistsReceivedByteAcknowledge Function
C
bool PLIB_I2C_ExistsReceivedByteAcknowledge(
I2C_MODULE_ID index
);
Description
This function identifies whether the ReceivedByteAcknowledge feature is available on the I2C module. When this function
returns true, these functions are supported on the device:
• PLIB_I2C_ReceivedByteAcknowledge
• PLIB_I2C_ReceiverByteAcknowledgeHasCompleted
• PLIB_I2C_MasterReceiverReadyToAcknowledge
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReceivedByteAcknowledge feature is supported on the device
• false - If the ReceivedByteAcknowledge feature is not supported on the device
Remarks
None.
5.6.9.5.10.17 PLIB_I2C_ExistsReceivedByteAvailable Function
C
bool PLIB_I2C_ExistsReceivedByteAvailable(
I2C_MODULE_ID index
);
Description
This function identifies whether the ReceivedByteAvailable feature is available on the I2C module. When this function returns
true, these functions are supported on the device:
• PLIB_I2C_ReceivedByteIsAvailable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReceivedByteAvailable feature is supported on the device
• false - If the ReceivedByteAvailable feature is not supported on the device
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Remarks
None.
5.6.9.5.10.18 PLIB_I2C_ExistsReceivedByteGet Function
C
bool PLIB_I2C_ExistsReceivedByteGet(
I2C_MODULE_ID index
);
Description
This function identifies whether the ReceivedByteGet feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_ReceivedByteGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReceivedByteGet feature is supported on the device
• false - If the ReceivedByteGet feature is not supported on the device
Remarks
None.
5.6.9.5.10.19 PLIB_I2C_ExistsReceiverOverflow Function
C
bool PLIB_I2C_ExistsReceiverOverflow(
I2C_MODULE_ID index
);
Description
This function identifies whether the ReceiverOverflow feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_ReceiverOverflowHasOccurred
• PLIB_I2C_ReceiverOverflowClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReceiverOverflow feature is supported on the device
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• false - If the ReceiverOverflow feature is not supported on the device
Remarks
None.
5.6.9.5.10.20 PLIB_I2C_ExistsReservedAddressProtect Function
C
bool PLIB_I2C_ExistsReservedAddressProtect(
I2C_MODULE_ID index
);
Description
This function identifies whether the ReservedAddressProtect feature is available on the I2C module. When this function returns
true, these functions are supported on the device:
• PLIB_I2C_ReservedAddressProtectEnable
• PLIB_I2C_ReservedAddressProtectDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReservedAddressProtect feature is supported on the device
• false - If the ReservedAddressProtect feature is not supported on the device
Remarks
None.
5.6.9.5.10.21 PLIB_I2C_ExistsSlaveAddress10Bit Function
C
bool PLIB_I2C_ExistsSlaveAddress10Bit(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveAddress10Bit feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_SlaveAddress10BitSet
• PLIB_I2C_SlaveAddress10BitGet
• PLIB_I2C_SlaveAddressModeIs10Bits
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - If the SlaveAddress10Bit feature is supported on the device
• false - If the SlaveAddress10Bit feature is not supported on the device
Remarks
None.
5.6.9.5.10.22 PLIB_I2C_ExistsSlaveAddress7Bit Function
C
bool PLIB_I2C_ExistsSlaveAddress7Bit(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveAddress7Bit feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_SlaveAddress7BitSet
• PLIB_I2C_SlaveAddress7BitGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveAddress7Bit feature is supported on the device
• false - If the SlaveAddress7Bit feature is not supported on the device
Remarks
None.
5.6.9.5.10.23 PLIB_I2C_ExistsSlaveAddressDetect Function
C
bool PLIB_I2C_ExistsSlaveAddressDetect(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveAddressDetect feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_SlaveAddress10BitWasDetected
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveAddressDetect feature is supported on the device
• false - If the SlaveAddressDetect feature is not supported on the device
Remarks
None.
5.6.9.5.10.24 PLIB_I2C_ExistsSlaveAddressHoldEnable Function
C
bool PLIB_I2C_ExistsSlaveAddressHoldEnable(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveAddressHoldEnable feature is available on the I2C module. When this function returns
true, these functions are supported on the device:
• PLIB_I2C_SlaveAddressHoldEnable
• PLIB_I2C_SlaveAddressHoldDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveAddressHoldEnable feature is supported on the device
• false - If the SlaveAddressHoldEnable feature is not supported on the device
Remarks
None.
5.6.9.5.10.25 PLIB_I2C_ExistsSlaveBufferOverwrite Function
C
bool PLIB_I2C_ExistsSlaveBufferOverwrite(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveBufferOverwrite feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_SlaveBufferOverwriteEnable
• PLIB_I2C_SlaveBufferOverwriteDisable
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveBufferOverwrite feature is supported on the device
• false - If the SlaveBufferOverwrite feature is not supported on the device
Remarks
None.
5.6.9.5.10.26 PLIB_I2C_ExistsSlaveBusCollisionDetect Function
C
bool PLIB_I2C_ExistsSlaveBusCollisionDetect(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveBusCollisionDetect feature is available on the I2C module. When this function returns
true, these functions are supported on the device:
• PLIB_I2C_SlaveBusCollisionDetectEnable
• PLIB_I2C_SlaveBusCollisionDetectDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveBusCollisionDetect feature is supported on the device
• false - If the SlaveBusCollisionDetect feature is not supported on the device
Remarks
None.
5.6.9.5.10.27 PLIB_I2C_ExistsSlaveClockHold Function
C
bool PLIB_I2C_ExistsSlaveClockHold(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveClockHold feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
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• PLIB_I2C_SlaveClockHold
• PLIB_I2C_SlaveClockRelease
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveClockHold feature is supported on the device
• false - If the SlaveClockHold feature is not supported on the device
Remarks
None.
5.6.9.5.10.28 PLIB_I2C_ExistsSlaveDataDetect Function
C
bool PLIB_I2C_ExistsSlaveDataDetect(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveDataDetect feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_SlaveDataIsDetected
• PLIB_I2C_SlaveAddressIsDetected
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveDataDetect feature is supported on the device
• false - If the SlaveDataDetect feature is not supported on the device
Remarks
None.
5.6.9.5.10.29 PLIB_I2C_ExistsSlaveInterruptOnStart Function
C
bool PLIB_I2C_ExistsSlaveInterruptOnStart(
I2C_MODULE_ID index
);
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Description
This function identifies whether the SlaveInterruptOnStart feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_SlaveInterruptOnStartEnable
• PLIB_I2C_SlaveInterruptOnStartDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveInterruptOnStart feature is supported on the device
• false - If the SlaveInterruptOnStart feature is not supported on the device
Remarks
None.
5.6.9.5.10.30 PLIB_I2C_ExistsSlaveInterruptOnStop Function
C
bool PLIB_I2C_ExistsSlaveInterruptOnStop(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveInterruptOnStop feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_SlaveInterruptOnStopEnable
• PLIB_I2C_SlaveInterruptOnStopDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveInterruptOnStop feature is supported on the device
• false - If the SlaveInterruptOnStop feature is not supported on the device
Remarks
None.
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5.6.9.5.10.31 PLIB_I2C_ExistsSlaveMask Function
C
bool PLIB_I2C_ExistsSlaveMask(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveMask feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_SlaveMask7BitSet
• PLIB_I2C_SlaveMask7BitGet
• PLIB_I2C_SlaveMask10BitSet
• PLIB_I2C_SlaveMask10BitGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveMask feature is supported on the device
• false - If the SlaveMask feature is not supported on the device
Remarks
None.
5.6.9.5.10.32 PLIB_I2C_ExistsSlaveReadRequest Function
C
bool PLIB_I2C_ExistsSlaveReadRequest(
I2C_MODULE_ID index
);
Description
This function identifies whether the SlaveReadRequest feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_SlaveReadIsRequested
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SlaveReadRequest feature is supported on the device
• false - If the SlaveReadRequest feature is not supported on the device
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Remarks
None.
5.6.9.5.10.33 PLIB_I2C_ExistsSMBus Function
C
bool PLIB_I2C_ExistsSMBus(
I2C_MODULE_ID index
);
Description
This function identifies whether the SMBus feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_SMBEnable
• PLIB_I2C_SMBDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SMBus feature is supported on the device
• false - If the SMBus feature is not supported on the device
Remarks
None.
5.6.9.5.10.34 PLIB_I2C_ExistsStartDetect Function
C
bool PLIB_I2C_ExistsStartDetect(
I2C_MODULE_ID index
);
Description
This function identifies whether the StartDetect feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_StartWasDetected
• PLIB_I2C_StartClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - If the StartDetect feature is supported on the device
• false - If the StartDetect feature is not supported on the device
Remarks
None.
5.6.9.5.10.35 PLIB_I2C_ExistsStopDetect Function
C
bool PLIB_I2C_ExistsStopDetect(
I2C_MODULE_ID index
);
Description
This function identifies whether the StopDetect feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_StopWasDetected
• PLIB_I2C_StopClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the StopDetect feature is supported on the device
• false - If the StopDetect feature is not supported on the device
Remarks
None.
5.6.9.5.10.36 PLIB_I2C_ExistsStopInIdle Function
C
bool PLIB_I2C_ExistsStopInIdle(
I2C_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the I2C module. When this function returns true, these
functions are supported on the device:
• PLIB_I2C_StopInIdleEnable
• PLIB_I2C_StopInIdleDisable
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the StopInIdle feature is supported on the device
• false - If the StopInIdle feature is not supported on the device
Remarks
None.
5.6.9.5.10.37 PLIB_I2C_ExistsTransmitterByteAcknowledge Function
C
bool PLIB_I2C_ExistsTransmitterByteAcknowledge(
I2C_MODULE_ID index
);
Description
This function identifies whether the TransmitterByteAcknowledge feature is available on the I2C module. When this function
returns true, these functions are supported on the device:
• PLIB_I2C_TransmitterByteWasAcknowledged
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the TransmitterByteAcknowledge feature is supported on the device
• false - If the TransmitterByteAcknowledge feature is not supported on the device
Remarks
None.
5.6.9.5.10.38 PLIB_I2C_ExistsTransmitterByteComplete Function
C
bool PLIB_I2C_ExistsTransmitterByteComplete(
I2C_MODULE_ID index
);
Description
This function identifies whether the TransmitterByteComplete feature is available on the I2C module. When this function returns
true, these functions are supported on the device:
• PLIB_I2C_TransmitterByteHasCompleted
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the TransmitterByteComplete feature is supported on the device
• false - If the TransmitterByteComplete feature is not supported on the device
Remarks
None.
5.6.9.5.10.39 PLIB_I2C_ExistsTransmitterByteSend Function
C
bool PLIB_I2C_ExistsTransmitterByteSend(
I2C_MODULE_ID index
);
Description
This function identifies whether the TransmitterByteSend feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_TransmitterByteSend
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the TransmitterByteSend feature is supported on the device
• false - If the TransmitterByteSend feature is not supported on the device
Remarks
None.
5.6.9.5.10.40 PLIB_I2C_ExistsTransmitterIsBusy Function
C
bool PLIB_I2C_ExistsTransmitterIsBusy(
I2C_MODULE_ID index
);
Description
This function identifies whether the TransmitterBusy feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_TransmitterIsBusy
• PLIB_I2C_TransmitterIsReady
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the TransmitterBusy feature is supported on the device
• false - If the TransmitterBusy feature is not supported on the device
Remarks
None.
5.6.9.5.10.41 PLIB_I2C_ExistsTransmitterOverflow Function
C
bool PLIB_I2C_ExistsTransmitterOverflow(
I2C_MODULE_ID index
);
Description
This function identifies whether the TransmitterOverflow feature is available on the I2C module. When this function returns true,
these functions are supported on the device:
• PLIB_I2C_TransmitterOverflowHasOccurred
• PLIB_I2C_TransmitterOverflowClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the TransmitterOverflow feature is supported on the device
• false - If the TransmitterOverflow feature is not supported on the device
Remarks
None.
5.6.9.5.11 Data Types and Constants
5.6.9.5.11.1 I2C_MODULE_ID Enumeration
C
typedef enum {
I2C_ID_1,
I2C_ID_2,
I2C_ID_3,
I2C_ID_4,
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I2C_ID_5,
I2C_NUMBER_OF_MODULES
} I2C_MODULE_ID;
Description
I2C Module ID
This enumeration identifies the available I2C modules.
Members
Members Description
I2C_ID_1 I2C Module 1 ID
I2C_ID_2 I2C Module 2 ID
I2C_ID_3 I2C Module 3 ID
I2C_ID_4 I2C Module 4 ID
I2C_ID_5 I2C Module 5 ID
I2C_NUMBER_OF_MODULES Number of available I2C modules.
Remarks
The caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to
the next.
Not all modules will be available on all microcontrollers. Refer to the data sheet for the specific controller in use to determine
which modules are supported. The numbers used in the enumeration values will match the numbers specified in the data sheet.
5.6.9.6 Files
Files
Name Description
plib_i2c.h This file contains the interface definition for the I2C Peripheral Library.
Description
5.6.9.6.1 plib_i2c.h
I2C Peripheral Library Interface Header
This library provides a low-level abstraction of the Inter-Integrated Circuit (I2C) module on Microchip microcontrollers with a
convenient C language interface. It can be used to simplify low-level access to the module without the necessity of interacting
directly with the module's registers, thus hiding differences between one microcontroller variant and another.
Functions
Name Description
PLIB_I2C_AcksequenceIsInProgress Checks whether the acknowledge sequence is in progress or
it is completed.
PLIB_I2C_ArbitrationLossClear Clears the arbitration loss status flag
PLIB_I2C_ArbitrationLossHasOccurred Identifies if bus arbitration has been lost.
PLIB_I2C_BaudRateGet Calculates the I2C module's current SCL clock frequency.
PLIB_I2C_BaudRateSet Sets the desired baud rate.
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PLIB_I2C_BusIsIdle Determines whether the I2C bus is idle or busy.
PLIB_I2C_DataLineHoldTimeSet Sets the data line hold time.
PLIB_I2C_Disable Disables the specified I2C module.
PLIB_I2C_Enable Enables the specified I2C module.
PLIB_I2C_ExistsAcksequenceProgress Identifies whether the AcksequenceIsInProgress feature
exists on the I2C module
PLIB_I2C_ExistsArbitrationLoss Identifies whether the ArbitrationLoss feature exists on the
I2C module
PLIB_I2C_ExistsBaudRate Identifies whether the BaudRate feature exists on the I2C
module
PLIB_I2C_ExistsBusIsIdle Identifies whether the BusIdle feature exists on the I2C
module
PLIB_I2C_ExistsClockStretching Identifies whether the ClockStretching feature exists on the
I2C module
PLIB_I2C_ExistsDataLineHoldTime Identifies whether the DataLineHoldTime feature exists on
the I2C module
PLIB_I2C_ExistsGeneralCall Identifies whether the GeneralCall feature exists on the I2C
module
PLIB_I2C_ExistsGeneralCallAddressDetect Identifies whether the GeneralCallAddressDetect feature
exists on the I2C module
PLIB_I2C_ExistsHighFrequency Identifies whether the HighFrequency feature exists on the
I2C module
PLIB_I2C_ExistsIPMI Identifies whether the IPMI feature exists on the I2C module
PLIB_I2C_ExistsMasterReceiverClock1Byte Identifies whether the MasterReceiverClock1Byte feature
exists on the I2C module
PLIB_I2C_ExistsMasterStart Identifies whether the MasterStart feature exists on the I2C
module
PLIB_I2C_ExistsMasterStartRepeat Identifies whether the MasterStartRepeat feature exists on
the I2C module
PLIB_I2C_ExistsMasterStop Identifies whether the MasterStop feature exists on the I2C
module
PLIB_I2C_ExistsModuleEnable Identifies whether the ModuleEnable feature exists on the
I2C module
PLIB_I2C_ExistsReceivedByteAcknowledge Identifies whether the ReceivedByteAcknowledge feature
exists on the I2C module
PLIB_I2C_ExistsReceivedByteAvailable Identifies whether the ReceivedByteAvailable feature exists
on the I2C module
PLIB_I2C_ExistsReceivedByteGet Identifies whether the ReceivedByteGet feature exists on the
I2C module
PLIB_I2C_ExistsReceiverOverflow Identifies whether the ReceiverOverflow feature exists on the
I2C module
PLIB_I2C_ExistsReservedAddressProtect Identifies whether the ReservedAddressProtect feature
exists on the I2C module
PLIB_I2C_ExistsSlaveAddress10Bit Identifies whether the SlaveAddress10Bit feature exists on
the I2C module
PLIB_I2C_ExistsSlaveAddress7Bit Identifies whether the SlaveAddress7Bit feature exists on the
I2C module
PLIB_I2C_ExistsSlaveAddressDetect Identifies whether the SlaveAddressDetect feature exists on
the I2C module
PLIB_I2C_ExistsSlaveAddressHoldEnable Identifies whether the SlaveAddressHoldEnable feature
exists on the I2C module
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PLIB_I2C_ExistsSlaveBufferOverwrite Identifies whether the SlaveBufferOverwrite feature exists on
the I2C module
PLIB_I2C_ExistsSlaveBusCollisionDetect Identifies whether the SlaveBusCollisionDetect feature exists
on the I2C module
PLIB_I2C_ExistsSlaveClockHold Identifies whether the SlaveClockHold feature exists on the
I2C module
PLIB_I2C_ExistsSlaveDataDetect Identifies whether the SlaveDataDetect feature exists on the
I2C module
PLIB_I2C_ExistsSlaveInterruptOnStart Identifies whether the SlaveInterruptOnStart feature exists on
the I2C module
PLIB_I2C_ExistsSlaveInterruptOnStop Identifies whether the SlaveInterruptOnStop feature exists on
the I2C module
PLIB_I2C_ExistsSlaveMask Identifies whether the SlaveMask feature exists on the I2C
module
PLIB_I2C_ExistsSlaveReadRequest Identifies whether the SlaveReadRequest feature exists on
the I2C module
PLIB_I2C_ExistsSMBus Identifies whether the SMBus feature exists on the I2C
module
PLIB_I2C_ExistsStartDetect Identifies whether the StartDetect feature exists on the I2C
module
PLIB_I2C_ExistsStopDetect Identifies whether the StopDetect feature exists on the I2C
module
PLIB_I2C_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the I2C
module
PLIB_I2C_ExistsTransmitterByteAcknowledge Identifies whether the TransmitterByteAcknowledge feature
exists on the I2C module
PLIB_I2C_ExistsTransmitterByteComplete Identifies whether the TransmitterByteComplete feature
exists on the I2C module
PLIB_I2C_ExistsTransmitterByteSend Identifies whether the TransmitterByteSend feature exists on
the I2C module
PLIB_I2C_ExistsTransmitterIsBusy Identifies whether the TransmitterBusy feature exists on the
I2C module
PLIB_I2C_ExistsTransmitterOverflow Identifies whether the TransmitterOverflow feature exists on
the I2C module
PLIB_I2C_GeneralCallDisable Disables the I2C module from recognizing the general call
address.
PLIB_I2C_GeneralCallEnable Enables the I2C module to recognize the general call
address.
PLIB_I2C_HighFrequencyDisable Disables the I2C module from using high frequency (400 kHz
or 1 MHz) signaling.
PLIB_I2C_HighFrequencyEnable Enables the I2C module to use high frequency (400 kHz or 1
MHz) signaling.
PLIB_I2C_IPMIDisable Disables the I2C module's support for the IPMI specification
PLIB_I2C_IPMIEnable Enables the I2C module to support the Intelligent Platform
Management Interface (IPMI) specification (see Remarks).
PLIB_I2C_MasterReceiverClock1Byte Drives the bus clock to receive 1 byte of data from a slave
device.
PLIB_I2C_MasterReceiverReadyToAcknowledge Checks whether the hardware is ready to acknowledge.
PLIB_I2C_MasterStart Sends an I2C Start condition on the I2C bus in Master mode.
PLIB_I2C_MasterStartRepeat Sends a repeated Start condition during an ongoing transfer
in Master mode.
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PLIB_I2C_MasterStop Sends an I2C Stop condition to terminate a transfer in
Master mode.
PLIB_I2C_ReceivedByteAcknowledge Allows a receiver to acknowledge a that a byte of data has
been received.
PLIB_I2C_ReceivedByteGet Gets a byte of data received from the I2C bus interface.
PLIB_I2C_ReceivedByteIsAvailable Detects whether the receiver has data available.
PLIB_I2C_ReceiverByteAcknowledgeHasCompleted Determines if the previous acknowledge has completed.
PLIB_I2C_ReceiverOverflowClear Clears the receiver overflow status flag.
PLIB_I2C_ReceiverOverflowHasOccurred Identifies if a receiver overflow error has occurred.
PLIB_I2C_ReservedAddressProtectDisable Disables the I2C module from protecting reserved
addresses, allowing it to respond to them.
PLIB_I2C_ReservedAddressProtectEnable Enables the I2C module to protect (not respond to) reserved
addresses.
PLIB_I2C_SlaveAddress10BitGet Identifies the current 10-bit Slave mode address.
PLIB_I2C_SlaveAddress10BitSet Selects 10-bit Slave mode addressing and sets the address
value.
PLIB_I2C_SlaveAddress10BitWasDetected Detects reception of the second byte of a 10-bit slave
address.
PLIB_I2C_SlaveAddress7BitGet Identifies the current 7-bit Slave mode address.
PLIB_I2C_SlaveAddress7BitSet Selects 7-bit Slave mode addressing and sets the slave
address value.
PLIB_I2C_SlaveAddressHoldDisable Disables Address holding.
PLIB_I2C_SlaveAddressHoldEnable Enables address holding.
PLIB_I2C_SlaveAddressIsDetected Detects if the most recent byte received is a data or an
address byte.
PLIB_I2C_SlaveAddressIsGeneralCall Identifies if the current slave address received is the general
call address.
PLIB_I2C_SlaveAddressModeIs10Bits Identifies if the current slave address mode is 7-bits or
10-bits.
PLIB_I2C_SlaveBufferOverwriteDisable Disables buffer overwrite.
PLIB_I2C_SlaveBufferOverwriteEnable Enables buffer overwrite.
PLIB_I2C_SlaveBusCollisionDetectDisable Disables bus collision detect interrupts.
PLIB_I2C_SlaveBusCollisionDetectEnable Enables slave bus collision interrupts.
PLIB_I2C_SlaveClockHold Holds the SCL clock line low after receiving a byte.
PLIB_I2C_SlaveClockRelease Releases a previously held SCL clock line.
PLIB_I2C_SlaveClockStretchingDisable Disables the I2C module from stretching the slave clock.
PLIB_I2C_SlaveClockStretchingEnable Enables the I2C module to stretch the slave clock.
PLIB_I2C_SlaveDataHoldDisable Disables data holding.
PLIB_I2C_SlaveDataHoldEnable Enables data holding.
PLIB_I2C_SlaveDataIsDetected Detects if the most recent byte received is a data or an
address byte.
PLIB_I2C_SlaveInterruptOnStartDisable Disables the featue of generating interrupt on start condition.
PLIB_I2C_SlaveInterruptOnStartEnable Enables the featue of generating interrupt on start condition.
PLIB_I2C_SlaveInterruptOnStopDisable Disables the featue of generating interrupt on stop condition.
PLIB_I2C_SlaveInterruptOnStopEnable Enables the featue of generating interrupt on stop condition.
PLIB_I2C_SlaveMask10BitGet Identifies the current 10-bit Slave mode address mask.
PLIB_I2C_SlaveMask10BitSet Sets the 10-bit mask for Slave mode addressing.
PLIB_I2C_SlaveMask7BitGet Identifies the current 7-bit Slave mode address mask.
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PLIB_I2C_SlaveMask7BitSet Sets the 7-bit mask for Slave mode addressing .
PLIB_I2C_SlaveReadIsRequested Detects if the request from the master was a read or write.
PLIB_I2C_SMBDisable Disable the I2C module support for SMBus electrical
signaling levels.
PLIB_I2C_SMBEnable Enables the I2C module to support System Management
Bus (SMBus) electrical signaling levels.
PLIB_I2C_StartClear Clears the start status flag
PLIB_I2C_StartWasDetected Identifies when a Start condition has been detected.
PLIB_I2C_StopClear Clears the stop status flag
PLIB_I2C_StopInIdleDisable Disables the Stop-in-Idle feature.
PLIB_I2C_StopInIdleEnable Enables the I2C module to stop when the processor enters
Idle mode
PLIB_I2C_StopWasDetected Identifies when a Stop condition has been detected
PLIB_I2C_TransmitterByteHasCompleted Detects whether the module has finished transmitting the
most recent byte.
PLIB_I2C_TransmitterByteSend Sends a byte of data on the I2C bus.
PLIB_I2C_TransmitterByteWasAcknowledged Determines whether the most recently sent byte was
acknowledged.
PLIB_I2C_TransmitterIsBusy Identifies if the transmitter of the specified I2C module is
currently busy (unable to accept more data).
PLIB_I2C_TransmitterIsReady Detects if the transmitter is ready to accept data to transmit.
PLIB_I2C_TransmitterOverflowClear Clears the transmitter overflow status flag.
PLIB_I2C_TransmitterOverflowHasOccurred Identifies if a transmitter overflow error has occurred.
File Name
plib_i2c.h
Company
Microchip Technology Inc.
5.6.10 Input Capture Peripheral Library
5.6.10.1 Introduction
Input Capture Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Input Capture (IC) Peripheral Library that is available on the Microchip family
of microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module without the
necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller variant to
another.
Description
The Input Capture (IC) module is used to capture a timer value on the occurrence of an event on an input pin. The IC module
plays a major role in applications requiring frequency measurement.
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Figure 1: Input Capture Module
Figure 1 shows the functionality of an Input Capture module. An input signal is provided to the input of this module. The input
may be prescaled. An edge detection block detects if the input is undergoing a rising or falling transition. Control logic
undertakes the capture of the timer value depending upon the operating mode selected.
Some devices have Input Capture modules with dedicated timers that can be used to synchronize multiple IC modules together
or cascade 16-bit timers to obtain a 32-bit timer. The timer may be triggered by an external, asynchronous input to start counting
as well.
The IC module has multiple modes of operation which can be used for different applications. Operating modes include the
following:
• Timer value capture at falling edge of input signal
• Timer value capture at rising edge of input signal
• Timer value capture at both edges of input signal
• Timer value capture on a specified edge of the input signal and every edge thereafter
• Timer value capture on every fourth or sixteenth rising edge of the input signal
• Interrupt-only mode in which Input Capture module acts as a source of external interrupt. This mode is functional only in
device sleep and idle modes.
The IC module also incorporates a First In First Out (FIFO) buffer, which temporarily holds the captured value until it is read by
the user application. The IC module is capable of generating interrupts when a set number of captures have taken place.
5.6.10.2 Release Notes
MPLAB Harmony Version: v0.70b IC Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
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Nothing to report in this release.
5.6.10.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.10.4 Using the Library
This topic describes the basic architecture of the IC Peripheral Library and provides information and examples on how to use it.
Interface Header File: plib_ic.h
The interface to the IC Peripheral library is defined in the "plib_ic.h" header file. This file is included by the "peripheral.h" file. Any
C language source (.c) file that uses the IC Peripheral library should include "peripheral.h".
Library File: The IC Peripheral library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the Peripheral interacts with the framework.
5.6.10.4.1 Hardware Abstraction Model
This library provides the low-level abstraction of the Input Capture (IC) module on the Microchip family of microcontrollers with a
convenient C language interface. This topic describes how that abstraction is modeled in the software and introduces the library
interface.
Note: The interface provided is a superset of all of the functionality of the available IC module on the device. Refer to the specific
device data sheet or related family reference manual section to determine the set of functions that are supported for each IC
module on your device.
Description
The IC Peripheral Library is used to simplify low-level access to the IC module without having the need to directly interact with
the module registers. The names of the functions are generic and lead to easier access to the IC module on different device
variants.
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Figure 2: Input Capture module Software Abstraction Block Diagram
The IC module can be described from a software standpoint as having functions to configure the module itself and select an
intended mode of operation. Separate functions exist to select the timer whose value is captured by the IC module. When an
external input event occurs, the IC module captures the timer value and stores it in a First In First Out (FIFO) buffer. The
captured value can be read from the FIFO buffer by performing an input buffer read by calling the respective function.
5.6.10.4.2 How the Library Works
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes.
All of the interface functions in this library are classified according to:
• General setup functions: These functions deal with general setup of the IC module
• Timer functions: These routines are used to select the timer, input for the timer, and configure synchronous or triggered
operation for the timer
• Operation Modes routine: The PLIB_IC_ModeSelect function is used to select an operation mode of IC module
• Input capture buffer routines: These routines deal with reading the capture value stored in the IC buffer and performing status
checks on the IC buffer
• Power-Saving modes:
• In Sleep mode, the IC module can function only as an external interrupt source. A rising edge input wakes the device from
sleep. An interrupt will be generated if it is enabled for that module.
• In Idle mode, the IC module can be configured to either stop its operation or continue its operation
• Exists functions: These functions determine whether or not a particular feature is present on a device
Subsequent sections provide examples that depict the use of interface routines to perform general tasks such as IC module
setup and reading captured values.
5.6.10.4.2.1 Input Capture Module Setup
This section shows the steps required to initialize and configure the IC module. The IC module is configured such that a capture
event occurs at the first falling edge of the input signal, and then at every subsequent edge of the input signal.
Example:
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/* This example shows how to initialize and configure IC module */
/* Disable IC module */
PLIB_IC_Disable(MY_IC_ID);
/* Disable any peripherals multiplexed with Input Capture pin */
/* Configure I/O pin as input pin. Refer PORTS Peripheral Library */
/* Stop in Idle mode is disabled for IC module. IC mode functions even in Idle mode */
PLIB_IC_StopInIdleDisable(MY_IC_ID);
/* Every Edge Capture mode of operation is selected for IC module */
PLIB_IC_ModeSelect(MY_IC_ID, IC_INPUT_CAPTURE_EVERY_EDGE_MODE);
/* Falling edge capture is set for IC module. IC module captures the timer value at the first
falling edge of input signal and subsequently at every edge */
PLIB_IC_FirstEdgeCaptureSet(MY_IC_ID,IC_EDGE_FALLING);
/* 32-bit timer is selected*/
PLIB_IC_BufferSizeSelect(MY_IC_ID, IC_BUFFER_SIZE_32BIT);
/* IC module is enabled */
PLIB_IC_Enable(MY_IC_ID);
5.6.10.4.2.2 Reading a Capture Value
This section shows how to read a capture value from the input capture buffer.
Example:
/* This example shows how to read a Capture value */
uint32_t bufferVal;
/* Reading a value from an empty Capture Buffer leads to indeterminate data*/
/* Read value from a non-empty buffer */
if(!PLIB_IC_BufferIsEmpty(MY_IC_ID))
{
/* Read the buffer value */
bufferVal = PLIB_IC_Buffer32BitGet(MY_IC_ID);
}
/* Buffer Overflow condition */
while(PLIB_IC_BufferOverflowHasOccurred)
{
/*Read buffer values till buffer is empty and overflow condition ceases*/
bufferVal = PLIB_IC_Buffer32BitGet(MY_IC_ID);
}
5.6.10.4.2.3 Synchronizing Timer
This section shows how to enable synchronous IC timer operation for the input capture buffer. The timer of IC2 is used as the
synchronization source for the IC1 module.
Example:
/* This example shows how to enable synchronous timer operation. Timer of IC1 is
operated in synchronism with timer of IC2 */
#define MY_IC_ID1 IC_ID_1
#define MY_IC_ID2 IC_ID_2
/* Disable IC2 module */
PLIB_IC_Disable(MY_IC_ID2);
/* Disable IC1 module */
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PLIB_IC_Disable(MY_IC_ID1);
/* Select synchronous mode of operation for IC1 */
PLIB_IC_SyncModeSelect(MY_IC_ID1,IC_MODE_SYNC);
/* Timer of IC2 is selected as synchronizing input */
PLIB_IC_SyncModeInputSelect(MY_IC_ID1,IC_SYNC_MODE_INPUT_ICAP2);
/*Timer-2 is selected as clock source for IC1 timer. It is important that
clock source should match with the clock source of synchronizing input*/
PLIB_IC_ClockSourceSelect(MY_IC_ID1,IC_CLOCK_SOURCE_TIMER2);
/* Select synchronous mode of operation for IC2 */
PLIB_IC_SyncModeSelect(MY_IC_ID2,IC_MODE_SYNC);
/*Timer-2 is selected as clock source for IC2 timer*/
PLIB_IC_ClockSourceSelect(MY_IC_ID2,IC_CLOCK_SOURCE_TIMER2);
/* Disable any peripherals multiplexed with IC1 pin */
/* Disable any peripherals multiplexed with IC2 pin */
/* Configure I/O pin as input pin for IC1. Refer PORTS Peripheral Library */
/* Configure I/O pin as input pin for IC2. Refer PORTS Peripheral Library */
/* IC1 module is enabled. It is important that IC2 in enabled last as IC2 timer
is being used as the source of synchronization */
PLIB_IC_Enable(MY_IC_ID1);
/* IC2 module is enabled.It is important that IC2 in enabled last as IC2 timer
is being used as the source of synchronization */
PLIB_IC_Enable(MY_IC_ID2);
5.6.10.4.3 Configuring the Library
The library is configured for the supported processor when the processor is chosen in the MPLAB IDE.
5.6.10.5 Library Interface
Data Types and Constants
Name Description
IC_BUFFER_SIZE Selects the IC Buffer size.
IC_CLOCK_SOURCES Lists all of the input capture modes for the IC module.
IC_EDGE_TYPES Lists the options to select a rising or falling edge for input capture.
IC_EVENTS_PER_INTERRUPT Lists the number of input capture events for an interrupt to occur.
IC_INPUT_CAPTURE_MODES Lists all of the input capture modes for the IC module.
IC_MODULE_ID IC_MODULE_ID
This enumeration defines the number of modules that are available on the
microcontroller. This is the superset of all of the possible instances that might be
available on a Microchip microcontroller.
Refer to the specific device data sheet to determine the correct number of
modules defined for the device.
IC_SYNC_MODE_INPUTS Lists the input sources for synchronous and asynchronous operation of the IC
module.
IC_SYNC_MODES Lists the synchronization modes for the IC module.
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IC_TIMERS Lists the different 16-bit timers for the IC module.
Feature Existence Functions
Name Description
PLIB_IC_ExistsAlternateClock Identifies whether the AlternateClock feature exists on the IC module
PLIB_IC_ExistsBufferIsEmptyStatus Identifies whether the BufferIsEmptyStatus feature exists on the IC
module
PLIB_IC_ExistsBufferOverflowStatus Identifies whether the BufferOverflowStatus feature exists on the IC
module.
PLIB_IC_ExistsBufferSize Identifies whether the BufferSize feature exists on the IC module.
PLIB_IC_ExistsBufferValue Identifies whether the BufferValue feature exists on the IC module.
PLIB_IC_ExistsCaptureMode Identifies whether the CaptureMode feature exists on the IC module.
PLIB_IC_ExistsClockSource Identifies whether the ClockSource feature exists on the IC module.
PLIB_IC_ExistsEdgeCapture Identifies whether the EdgeCapture feature exists on the IC module.
PLIB_IC_ExistsEnable Identifies whether the EnableControl feature exists on the IC module
PLIB_IC_ExistsEventsPerInterruptSelect Identifies whether the EventsPerInterruptSelect feature exists on the IC
module.
PLIB_IC_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the IC module.
PLIB_IC_ExistsSyncMode Identifies whether the SyncMode feature exists on the IC module.
PLIB_IC_ExistsSyncModeInput Identifies whether the SyncModeInput feature exists on the IC module.
PLIB_IC_ExistsTimerSelect Identifies whether the TimerSelect feature exists on the IC module.
PLIB_IC_ExistsTimerTriggered Identifies whether the TimerTriggered feature exists on the IC module.
General Setup Functions
Name Description
PLIB_IC_Disable Disables the IC module.
PLIB_IC_Enable Enables the IC module.
PLIB_IC_EventsPerInterruptSelect Selects the number of capture events before an interrupt is issued.
PLIB_IC_FirstCaptureEdgeSelect Captures the timer count value at the first selected edge of input signal.
Input Capture Buffer Functions
Name Description
PLIB_IC_Buffer16BitGet Obtains the 16-bit input capture buffer value.
PLIB_IC_Buffer32BitGet Obtains the 32-bit input capture buffer value.
PLIB_IC_BufferIsEmpty Checks whether the input capture buffer is empty.
PLIB_IC_BufferOverflowHasOccurred Checks whether an input capture buffer overflow has occurred.
PLIB_IC_BufferSizeSelect Sets the input capture buffer size.
Operation Modes Functions
Name Description
PLIB_IC_ModeSelect Selects the input capture mode for IC module.
Power-Saving Modes Functions
Name Description
PLIB_IC_StopInIdleDisable Continues module operation when the device enters Idle mode
PLIB_IC_StopInIdleEnable Discontinues IC module operation when the device enters Idle mode.
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Timer Functions
Name Description
PLIB_IC_ClockSourceSelect Selects the clock source for the IC module.
PLIB_IC_SyncModeInputSelect Selects the input source for synchronous or asynchronous (triggered) operation of
the IC module.
PLIB_IC_SyncModeSelect Selects the synchronization mode for Input Capture module.
PLIB_IC_TimerIsTriggered Checks whether or not the input capture timer has been triggered.
PLIB_IC_TimerSelect Selects the 16-bit timer source for the IC module.
PLIB_IC_AlternateClockDisable Selects Timer 2/3.instead of the alternate clock source.
PLIB_IC_AlternateClockEnable Selects the alternate clock source.
Description
This section describes the Application Programming Interface (API) functions of the Input Capture Peripheral.
Refer to each section for a detailed description.
5.6.10.5.1 General Setup Functions
5.6.10.5.1.1 PLIB_IC_Disable Function
C
void PLIB_IC_Disable(
IC_MODULE_ID index
);
Description
This function disables the IC module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the IC module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsEnable in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
PLIB_IC_Disable(MY_IC_ID);
5.6.10.5.1.2 PLIB_IC_Enable Function
C
void PLIB_IC_Enable(
IC_MODULE_ID index
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);
Description
This function enables the IC module.
Preconditions
The module should be appropriately configured before being enabled.
Parameters
Parameters Description
index Identifies the desired IC module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsEnable in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
//Do all the other configurations before enabling.
PLIB_IC_Enable(MY_IC_ID);
5.6.10.5.1.3 PLIB_IC_EventsPerInterruptSelect Function
C
void PLIB_IC_EventsPerInterruptSelect(
IC_MODULE_ID index,
IC_EVENTS_PER_INTERRUPT event
);
Description
The IC module can be configured to generate interrupts depending upon the the occurrence of a certain number of capture
events. The number of capture events before an interrupt is generated is set by this function.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired IC module
event Identifies the interrupt control mode
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsEventsPerInterruptSelect in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
// IC module is configured to generate interrupt on every capture event
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PLIB_IC_EventsPerInterruptSelect(MY_IC_ID, IC_INTERRUPT_ON_EVERY_CAPTURE_EVENT );
5.6.10.5.1.4 PLIB_IC_FirstCaptureEdgeSelect Function
C
void PLIB_IC_FirstCaptureEdgeSelect(
IC_MODULE_ID index,
IC_EDGE_TYPES edgeType
);
Description
This function captures the timer count value at the first selected edge of the input signal.
Preconditions
This setting applies only when the Every Edge Capture mode is set. The capture mode is set by the PLIB_IC_ModeSelect()
function.
Parameters
Parameters Description
index Identifies the desired IC module
edgeType Identifies the edge type (i.e., whether rising or falling edge)
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsEdgeCapture in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
PLIB_IC_FirstCaptureEdgeSelect(MY_IC_ID,IC_EDGE_FALLING);
5.6.10.5.2 Timer Functions
5.6.10.5.2.1 PLIB_IC_ClockSourceSelect Function
C
void PLIB_IC_ClockSourceSelect(
IC_MODULE_ID index,
IC_CLOCK_SOURCES src
);
Description
This function selects the clock source for the IC module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired IC module
src Identifies the clock source
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsClockSource in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
// Clock source of Timer2 is selected as clock source for Input Capture module
PLIB_IC_ClockSourceSelect(MY_IC_ID,IC_CLOCK_SOURCE_TIMER2);
5.6.10.5.2.2 PLIB_IC_SyncModeInputSelect Function
C
void PLIB_IC_SyncModeInputSelect(
IC_MODULE_ID index,
IC_SYNC_MODE_INPUTS input
);
Description
This function selects the input source for synchronous or asynchronous (triggered) operation of the IC module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired IC module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsSyncModeInput in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
//
PLIB_IC_SyncModeInputSelect(MY_IC_ID,IC_SYNC_MODE_INPUT_OC1);
5.6.10.5.2.3 PLIB_IC_SyncModeSelect Function
C
void PLIB_IC_SyncModeSelect(
IC_MODULE_ID index,
IC_SYNC_MODES syncMode
);
Description
This function selects the synchronization mode for the IC module. The Synchronous or Asynchronous mode of operation can be
selected for the IC module timer.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired IC module
syncMode Identifies the mode (Synchronous or Asynchronous)
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsSyncMode in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
// External input triggers Input Capture module asynchronously
PLIB_IC_SyncModeSelect(MY_IC_ID,IC_MODE_ASYNC);
5.6.10.5.2.4 PLIB_IC_TimerIsTriggered Function
C
bool PLIB_IC_TimerIsTriggered(
IC_MODULE_ID index
);
Description
This function checks whether or not the input capture timer has been triggered. This function returns 'true' if the IC timer is
triggered and running and returns 'false' if the IC timer is cleared and stopped.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired IC module
Returns
bool - true - The IC timer is triggered and running
• false - The IC timer is stopped and held in clear
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsTimerTriggered in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
if(!PLIB_IC_TimerIsTriggered(MY_IC_ID))
{
// Do some operation
};
5.6.10.5.2.5 PLIB_IC_TimerSelect Function
C
void PLIB_IC_TimerSelect(
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IC_MODULE_ID index,
IC_TIMERS tmr
);
Description
This function selects the 16-bit timer source for the IC module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired IC module
tmr Identifies the 16-bit timer
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsTimerSelect in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
// 16-bit Timer-2 is selected
PLIB_IC_TimerSelect(MY_IC_ID, IC_TIMER_TMR2);
5.6.10.5.2.6 PLIB_IC_AlternateClockDisable Function
C
void PLIB_IC_AlternateClockDisable(
IC_MODULE_ID index
);
Description
Selects Timer 2/3.instead of the alternate clock source.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired IC module
Returns
None.
Remarks
The feature is not supported on all devices. Check your device's data sheet. A system unlock must be performed before this
function can be executed. This function applies to all input capture modules, regardless of the IC_MODULE_ID passed in the call.
Example
// Call system service to unlock oscillator
#define MY_IC_ID IC_ID_1
PLIB_IC_AlternateClockDisable( MY_IC_ID );
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5.6.10.5.2.7 PLIB_IC_AlternateClockEnable Function
C
void PLIB_IC_AlternateClockEnable(
IC_MODULE_ID index
);
Description
Selects the alternate clock source instead of Timer 2/3.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired IC module
Returns
None.
Remarks
The feature is not supported on all devices. Check your device's data sheet. A system unlock must be performed before this
function can be executed. This function applies to all input capture modules, regardless of the IC_MODULE_ID passed in the call.
Example
// Call system service to unlock oscillator
#define MY_IC_ID IC_ID_1
PLIB_IC_AlternateClockEnable( MY_IC_ID );
5.6.10.5.3 Input Capture Buffer Functions
5.6.10.5.3.1 PLIB_IC_Buffer16BitGet Function
C
uint16_t PLIB_IC_Buffer16BitGet(
IC_MODULE_ID index
);
Description
This function reads the 16-bit value of the IC buffer to obtain the captured timer value. This function is used when the buffer size
is set to 16-bits.
Preconditions
The buffer size should be set to 16 bits (i.e., PLIB_IC_BufferSizeSet(MY_IC_ID, IC_BUFFER_SIZE_16BIT).
Parameters
Parameters Description
index Identifies the desired IC module
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsBufferValue in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
uint16_t bufferVal;
// Read input capture buffer value and store it in 'bufferVal'
bufferVal = PLIB_IC_Buffer16BitGet(MY_IC_ID);
5.6.10.5.3.2 PLIB_IC_Buffer32BitGet Function
C
uint32_t PLIB_IC_Buffer32BitGet(
IC_MODULE_ID index
);
Description
This function reads the 32-bit value of the IC buffer to obtain the captured timer value. This function is used when the buffer size
is set to 32-bits.
Preconditions
The buffer size should be set to 32 bits (i.e., PLIB_IC_BufferSizeSet(MY_IC_ID, IC_BUFFER_SIZE_32BIT).
Parameters
Parameters Description
index Identifies the desired IC module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsBufferValue in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
uint32_t bufferVal;
// Read input capture buffer value and store it in 'bufferVal'
bufferVal = PLIB_IC_Buffer32BitGet(MY_IC_ID);
5.6.10.5.3.3 PLIB_IC_BufferIsEmpty Function
C
bool PLIB_IC_BufferIsEmpty(
IC_MODULE_ID index
);
Description
This function returns 'true' if the input capture buffer is empty and 'false' if the buffer is not empty.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired IC module
Returns
bool - true - The input capture buffer is empty
• false - The input capture buffer is not empty
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsBufferIsEmptyStatus in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
if(!PLIB_IC_BufferIsEmpty(MY_IC_ID))
{
// Do some operation
};
5.6.10.5.3.4 PLIB_IC_BufferOverflowHasOccurred Function
C
bool PLIB_IC_BufferOverflowHasOccurred(
IC_MODULE_ID index
);
Description
This function returns 'true' if an input capture buffer has overflowed and 'false' if the buffer has not overflowed.
Preconditions
This function only applies when not in Edge Detect mode.
Parameters
Parameters Description
index Identifies the desired IC module
Returns
bool - true - An overflow of the input capture buffer has occurred
• false - An overflow of the input capture buffer has not occurred
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsBufferOverflowStatus in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
if(!PLIB_IC_BufferOverflowHasOccurred(MY_IC_ID))
{
// Do some operation
};
5.6.10.5.3.5 PLIB_IC_BufferSizeSelect Function
C
void PLIB_IC_BufferSizeSelect(
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IC_MODULE_ID index,
IC_BUFFER_SIZE bufSize
);
Description
This function sets the input capture buffer size for IC module. The buffer size can be set to 16 bits or 32 bits. The buffer size
should be consistent with the timer selected. A 32-bit timer requires a 32-bit buffer and a 16-bit timer requires a 16-bit buffer.
Preconditions
The buffer size should be consistent with the timer selected.
Parameters
Parameters Description
index Identifies the desired IC module
bufSize Sets the buffer size to 16 bits or 32 bits
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsBufferSize in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
// 32-bit timer resource is selected
PLIB_IC_BufferSizeSelect(MY_IC_ID, IC_BUFFER_SIZE_32BIT);
5.6.10.5.4 Operation Modes Functions
5.6.10.5.4.1 PLIB_IC_ModeSelect Function
C
void PLIB_IC_ModeSelect(
IC_MODULE_ID index,
IC_INPUT_CAPTURE_MODES modeSel
);
Description
This function selects the input capture mode for the IC module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired IC module
modeSel Identifies the timer type required
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_IC_ExistsCaptureMode in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
// Every Edge Mode is selected
PLIB_IC_ModeSelect(MY_IC_ID, IC_INPUT_CAPTURE_EVERY_EDGE_MODE);
5.6.10.5.5 Power-Saving Modes Functions
5.6.10.5.5.1 PLIB_IC_StopInIdleDisable Function
C
void PLIB_IC_StopInIdleDisable(
IC_MODULE_ID index
);
Description
The function continues operation of the IC module when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired IC module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsStopInIdle in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
PLIB_IC_StopInIdleDisable(MY_IC_ID);
5.6.10.5.5.2 PLIB_IC_StopInIdleEnable Function
C
void PLIB_IC_StopInIdleEnable(
IC_MODULE_ID index
);
Description
This function discontinues IC module operation when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired IC module
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_IC_ExistsStopInIdle in your application to determine whether this feature is available.
Example
#define MY_IC_ID IC_ID_1
PLIB_IC_StopInIdleEnable(MY_IC_ID);
5.6.10.5.6 Data Types and Constants
5.6.10.5.6.1 IC_BUFFER_SIZE Enumeration
C
typedef enum {
IC_BUFFER_SIZE_32BIT,
IC_BUFFER_SIZE_16BIT
} IC_BUFFER_SIZE;
Description
IC Buffer Size
The IC buffer can be set to 16 bits or 32 bits. The buffer size is set by the PLIB_IC_BufferSizeSelect() function.
Members
Members Description
IC_BUFFER_SIZE_32BIT 32-bit timer source select
IC_BUFFER_SIZE_16BIT 16-bit timer source select
5.6.10.5.6.2 IC_CLOCK_SOURCES Enumeration
C
typedef enum {
IC_CLOCK_SOURCE_TIMER1,
IC_CLOCK_SOURCE_TIMER2,
IC_CLOCK_SOURCE_TIMER3,
IC_CLOCK_SOURCE_TIMER4,
IC_CLOCK_SOURCE_TIMER5,
IC_CLOCK_SOURCE_SYSTEM
} IC_CLOCK_SOURCES;
Description
IC Clock Sources Select
This enumeration lists all of the input capture modes for IC module. The capture mode is set via the
PLIB_IC_ClockSourceSelect() function.
Members
Members Description
IC_CLOCK_SOURCE_TIMER1 Clock source of Timer1 is the clock source of the capture counter
IC_CLOCK_SOURCE_TIMER2 Clock source of Timer2 is the clock source of the capture counter
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IC_CLOCK_SOURCE_TIMER3 Clock source of Timer3 is the clock source of the capture counter
IC_CLOCK_SOURCE_TIMER4 Clock source of Timer4 is the clock source of the capture counter
IC_CLOCK_SOURCE_TIMER5 Clock source of Timer5 is the clock source of the capture counter
IC_CLOCK_SOURCE_SYSTEM System Clock is the clock source of the capture counter
5.6.10.5.6.3 IC_EDGE_TYPES Enumeration
C
typedef enum {
IC_EDGE_FALLING,
IC_EDGE_RISING
} IC_EDGE_TYPES;
Description
IC Edge Types Select
This enumeration lists the options to select a rising edge input capture or a falling edge input capture. The selection is made by
the PLIB_IC_FirstCaptureEdgeSelect() function.
Members
Members Description
IC_EDGE_FALLING Select Falling Edge
IC_EDGE_RISING Select Rising Edge
5.6.10.5.6.4 IC_EVENTS_PER_INTERRUPT Enumeration
C
typedef enum {
IC_INTERRUPT_ON_EVERY_4TH_CAPTURE_EVENT,
IC_INTERRUPT_ON_EVERY_3RD_CAPTURE_EVENT,
IC_INTERRUPT_ON_EVERY_2ND_CAPTURE_EVENT,
IC_INTERRUPT_ON_EVERY_CAPTURE_EVENT
} IC_EVENTS_PER_INTERRUPT;
Description
IC Capture Events Per Interrupt Select
This enumeration lists the number of events that should occur before an interrupt is generated. An interrupt can occur on every
capture event, every second, every third, or every fourth capture event.
Members
Members Description
IC_INTERRUPT_ON_EVERY_4TH_CAPTURE_EVENT Interrupt on every 4th capture event
IC_INTERRUPT_ON_EVERY_3RD_CAPTURE_EVENT Interrupt on every 3rd capture event
IC_INTERRUPT_ON_EVERY_2ND_CAPTURE_EVENT Interrupt on every 2nd capture event
IC_INTERRUPT_ON_EVERY_CAPTURE_EVENT Interrupt on every capture event
5.6.10.5.6.5 IC_INPUT_CAPTURE_MODES Enumeration
C
typedef enum {
IC_INPUT_CAPTURE_INTERRUPT_MODE,
IC_INPUT_CAPTURE_EVERY_EDGE_MODE,
IC_INPUT_CAPTURE_EVERY_16TH_EDGE_MODE,
IC_INPUT_CAPTURE_EVERY_4TH_EDGE_MODE,
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IC_INPUT_CAPTURE_RISING_EDGE_MODE,
IC_INPUT_CAPTURE_FALLING_EDGE_MODE,
IC_INPUT_CAPTURE_EDGE_DETECT_MODE,
IC_INPUT_CAPTURE_DISABLE_MODE
} IC_INPUT_CAPTURE_MODES;
Description
IC Input Capture Mode Select
This enumeration lists all of the input capture modes for IC module. The capture mode is set via the PLIB_IC_ModeSelect()
function.
Members
Members Description
IC_INPUT_CAPTURE_INTERRUPT_MODE Interrupt only mode: Rising edge on input triggers an interrupt. This
mode is used only when device is in Sleep/Idle mode
IC_INPUT_CAPTURE_EVERY_EDGE_MODE Every Edge Capture mode: The first edge of the input signal is specified
via PLIB_IC_RisingEdgeCaptureSet() or
PLIB_IC_FallingEdgeCaptureSet() routines. Subsequently, timer count
value is captured on every rising and falling of the input signal
IC_INPUT_CAPTURE_EVERY_16TH_EDGE_MODE Prescaled Capture mode: Timer count value is captured every 16th rising
edge of input signal
IC_INPUT_CAPTURE_EVERY_4TH_EDGE_MODE Prescaled Capture mode: Timer count value is captured every 4th rising
edge of input signal
IC_INPUT_CAPTURE_RISING_EDGE_MODE Rising Edge mode: Timer count value is captured on every rising edge of
input signal
IC_INPUT_CAPTURE_FALLING_EDGE_MODE Falling Edge mode: Timer count value is captured on every falling edge
of input signal
IC_INPUT_CAPTURE_EDGE_DETECT_MODE Edge Detect mode: Timer count value is captured on every rising and
falling of the input signal Interrupt control bits are ignored and an
interrupt event is generated for every capture. Overflow status is not
updated.
IC_INPUT_CAPTURE_DISABLE_MODE Capture module is disabled.Input signal is ignored and no capture events
or interrupts are generated
5.6.10.5.6.6 IC_MODULE_ID Enumeration
C
typedef enum {
IC_ID_1,
IC_ID_2,
IC_ID_3,
IC_ID_4,
IC_ID_5,
IC_ID_6,
IC_ID_7,
IC_ID_8,
IC_ID_9,
IC_NUMBER_OF_MODULES
} IC_MODULE_ID;
Description
IC_MODULE_ID
This enumeration defines the number of modules that are available on the microcontroller. This is the superset of all of the
possible instances that might be available on a Microchip microcontroller.
Refer to the specific device data sheet to determine the correct number of modules defined for the device.
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Members
Members Description
IC_NUMBER_OF_MODULES The total number of modules available.
5.6.10.5.6.7 IC_SYNC_MODE_INPUTS Enumeration
C
typedef enum {
IC_SYNC_MODE_INPUT_OC1,
IC_SYNC_MODE_INPUT_OC2,
IC_SYNC_MODE_INPUT_OC3,
IC_SYNC_MODE_INPUT_OC4,
IC_SYNC_MODE_INPUT_OC5,
IC_SYNC_MODE_INPUT_OC6,
IC_SYNC_MODE_INPUT_OC7,
IC_SYNC_MODE_INPUT_OC8,
IC_SYNC_MODE_INPUT_OC9,
IC_SYNC_MODE_INPUT_ICAP1,
IC_SYNC_MODE_INPUT_ICAP2,
IC_SYNC_MODE_INPUT_ICAP3,
IC_SYNC_MODE_INPUT_ICAP4,
IC_SYNC_MODE_INPUT_ICAP5,
IC_SYNC_MODE_INPUT_ICAP6,
IC_SYNC_MODE_INPUT_ICAP7,
IC_SYNC_MODE_INPUT_ICAP8,
IC_SYNC_MODE_INPUT_ICAP9,
IC_SYNC_MODE_INPUT_TMR1,
IC_SYNC_MODE_INPUT_TMR2,
IC_SYNC_MODE_INPUT_TMR3,
IC_SYNC_MODE_INPUT_TMR4,
IC_SYNC_MODE_INPUT_TMR5,
IC_SYNC_MODE_INPUT_PTG,
IC_SYNC_MODE_INPUT_CMP1,
IC_SYNC_MODE_INPUT_CMP2,
IC_SYNC_MODE_INPUT_CMP3,
IC_SYNC_MODE_INPUT_AD,
IC_SYNC_MODE_INPUT_CTMU,
IC_SYNC_MODE_INPUT_NONE
} IC_SYNC_MODE_INPUTS;
Description
IC Synchronization and Trigger input select
This enumeration lists all of the input sources for synchronous and asynchronous operation of IC module. The Input source can
be selected by the PLIB_IC_SyncModeInputSelect() function.
Members
Members Description
IC_SYNC_MODE_INPUT_OC1 Synchronization and trigger input is Output Compare1
IC_SYNC_MODE_INPUT_OC2 Synchronization and trigger input is Output Compare2
IC_SYNC_MODE_INPUT_OC3 Synchronization and trigger input is Output Compare3
IC_SYNC_MODE_INPUT_OC4 Synchronization and trigger input is Output Compare4
IC_SYNC_MODE_INPUT_OC5 Synchronization and trigger input is Output Compare5
IC_SYNC_MODE_INPUT_OC6 Synchronization and trigger input is Output Compare6
IC_SYNC_MODE_INPUT_OC7 Synchronization and trigger input is Output Compare7
IC_SYNC_MODE_INPUT_OC8 Synchronization and trigger input is Output Compare8
IC_SYNC_MODE_INPUT_OC9 Synchronization and trigger input is Output Compare9
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IC_SYNC_MODE_INPUT_ICAP1 Synchronization and trigger input is Input Capture1
IC_SYNC_MODE_INPUT_ICAP2 Synchronization and trigger input is Input Capture2
IC_SYNC_MODE_INPUT_ICAP3 Synchronization and trigger input is Input Capture3
IC_SYNC_MODE_INPUT_ICAP4 Synchronization and trigger input is Input Capture4
IC_SYNC_MODE_INPUT_ICAP5 Synchronization and trigger input is Input Capture5
IC_SYNC_MODE_INPUT_ICAP6 Synchronization and trigger input is Input Capture6
IC_SYNC_MODE_INPUT_ICAP7 Synchronization and trigger input is Input Capture7
IC_SYNC_MODE_INPUT_ICAP8 Synchronization and trigger input is Input Capture8
IC_SYNC_MODE_INPUT_ICAP9 Synchronization and trigger input is Input Capture9
IC_SYNC_MODE_INPUT_TMR1 Synchronization and trigger input is Timer1
IC_SYNC_MODE_INPUT_TMR2 Synchronization and trigger input is Timer2
IC_SYNC_MODE_INPUT_TMR3 Synchronization and trigger input is Timer3
IC_SYNC_MODE_INPUT_TMR4 Synchronization and trigger input is Timer4
IC_SYNC_MODE_INPUT_TMR5 Synchronization and trigger input is Timer5
IC_SYNC_MODE_INPUT_PTG Synchronization and trigger input is Peripheral Trigger Generator Module
IC_SYNC_MODE_INPUT_CMP1 Trigger input is Comparator1. This input is not used for Synchronization
IC_SYNC_MODE_INPUT_CMP2 Trigger input is Comparator2. This input is not used for Synchronization
IC_SYNC_MODE_INPUT_CMP3 Trigger input is Comparator3. This input is not used for Synchronization
IC_SYNC_MODE_INPUT_AD Trigger input is ADC. This input is not used for Synchronization
IC_SYNC_MODE_INPUT_CTMU Trigger input is Charge Time Measurement Unit. This input is not used for
Synchronization
IC_SYNC_MODE_INPUT_NONE No synchronization and trigger input
5.6.10.5.6.8 IC_SYNC_MODES Enumeration
C
typedef enum {
IC_MODE_ASYNC,
IC_MODE_SYNC
} IC_SYNC_MODES;
Description
IC Synchronization Mode Select
This enumeration lists the synchronization modes for the IC module. The IC module timer can function in synchronism with the
input source or triggered asynchronously by an input trigger.
Members
Members Description
IC_MODE_ASYNC Input source acts as an asynchronous trigger to start Input Capture timer. The
Input source can be selected by PLIB_IC_SyncModeInputSelect() routine
IC_MODE_SYNC Input source synchronizes Input Capture timer to other modules. The Input source
can be selected by PLIB_IC_SyncModeInputSelect() routine
5.6.10.5.6.9 IC_TIMERS Enumeration
C
typedef enum {
IC_TIMER_TMR3,
IC_TIMER_TMR2
} IC_TIMERS;
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Description
IC 16-bit Timer Select
This enumeration lists the different 16-bit timers for the IC timebase when the IC module is configured with a 16-bit timer
resource.
Members
Members Description
IC_TIMER_TMR3 Timer3 select
IC_TIMER_TMR2 Timer2 select
5.6.10.5.7 Feature Existence Functions
5.6.10.5.7.1 PLIB_IC_ExistsAlternateClock Function
C
bool PLIB_IC_ExistsAlternateClock(
IC_MODULE_ID index
);
Description
This function identifies whether the AlternateClock feature is available on the IC module. When this function returns true, these
functions are supported on the device:
• PLIB_IC_AlternateClockEnable
• PLIB_IC_AlternateClockDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlternateClock feature is supported on the device
• false - The AlternateClock feature is not supported on the device
Remarks
None.
5.6.10.5.7.2 PLIB_IC_ExistsBufferIsEmptyStatus Function
C
bool PLIB_IC_ExistsBufferIsEmptyStatus(
IC_MODULE_ID index
);
Description
This function identifies whether the BufferIsEmptyStatus feature is available on the IC module. When this function returns true,
this function is supported on the device:
• PLIB_IC_BufferIsEmpty
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BufferIsEmptyStatus feature is supported on the device
• false - The BufferIsEmptyStatus feature is not supported on the device
Remarks
None.
5.6.10.5.7.3 PLIB_IC_ExistsBufferOverflowStatus Function
C
bool PLIB_IC_ExistsBufferOverflowStatus(
IC_MODULE_ID index
);
Description
This function identifies whether the BufferOverflowStatus feature is available on the IC module. When this function returns true,
this function is supported on the device:
• PLIB_IC_BufferOverflowHasOccurred
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BufferOverflowStatus feature is supported on the device
• false - The BufferOverflowStatus feature is not supported on the device
Remarks
None.
5.6.10.5.7.4 PLIB_IC_ExistsBufferSize Function
C
bool PLIB_IC_ExistsBufferSize(
IC_MODULE_ID index
);
Description
This function identifies whether the BufferSize feature is available on the IC module. When this function returns true, this function
is supported on the device:
• PLIB_IC_BufferSizeSelect
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BufferSize feature is supported on the device
• false - The BufferSize feature is not supported on the device
Remarks
None.
5.6.10.5.7.5 PLIB_IC_ExistsBufferValue Function
C
bool PLIB_IC_ExistsBufferValue(
IC_MODULE_ID index
);
Description
This function identifies whether the BufferValue feature is available on the IC module. When this function returns true, these
functions are supported on the device:
• PLIB_IC_Buffer32BitGet
• PLIB_IC_Buffer16BitGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BufferValue feature is supported on the device
• false - The BufferValue feature is not supported on the device
Remarks
None.
5.6.10.5.7.6 PLIB_IC_ExistsCaptureMode Function
C
bool PLIB_IC_ExistsCaptureMode(
IC_MODULE_ID index
);
Description
This function identifies whether the CaptureMode feature is available on the IC module. When this function returns true, this
function is supported on the device:
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• PLIB_IC_ModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CaptureMode feature is supported on the device
• false - The CaptureMode feature is not supported on the device
Remarks
None.
5.6.10.5.7.7 PLIB_IC_ExistsClockSource Function
C
bool PLIB_IC_ExistsClockSource(
IC_MODULE_ID index
);
Description
This function identifies whether the ClockSource feature is available on the IC module. When this function returns true, this
function is supported on the device:
• PLIB_IC_ClockSourceSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ClockSource feature is supported on the device
• false - If the ClockSource feature is not supported on the device
Remarks
None.
5.6.10.5.7.8 PLIB_IC_ExistsEdgeCapture Function
C
bool PLIB_IC_ExistsEdgeCapture(
IC_MODULE_ID index
);
Description
This function identifies whether the EdgeCapture feature is available on the IC module. When this function returns true, this
function is supported on the device:
• PLIB_IC_FirstCaptureEdgeSelect
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EdgeCapture feature is supported on the device
• false - The EdgeCapture feature is not supported on the device
Remarks
None.
5.6.10.5.7.9 PLIB_IC_ExistsEnable Function
C
bool PLIB_IC_ExistsEnable(
IC_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the IC module. When this function returns true, these
functions are supported on the device:
• PLIB_IC_Enable
• PLIB_IC_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EnableControl feature is supported on the device
• false - The EnableControl feature is not supported on the device
Remarks
None.
5.6.10.5.7.10 PLIB_IC_ExistsEventsPerInterruptSelect Function
C
bool PLIB_IC_ExistsEventsPerInterruptSelect(
IC_MODULE_ID index
);
Description
This function identifies whether the EventsPerInterruptSelect feature is available on the IC module. When this function returns
true, this function is are supported on the device:
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• PLIB_IC_EventsPerInterruptSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EventsPerInterruptSelect feature is supported on the device
• false - The EventsPerInterruptSelect feature is not supported on the device
Remarks
None.
5.6.10.5.7.11 PLIB_IC_ExistsStopInIdle Function
C
bool PLIB_IC_ExistsStopInIdle(
IC_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the IC module. When this function returns true, these
functions are supported on the device:
• PLIB_IC_StopInIdleEnable
• PLIB_IC_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StopInIdle feature is supported on the device
• false - The StopInIdle feature is not supported on the device
Remarks
None.
5.6.10.5.7.12 PLIB_IC_ExistsSyncMode Function
C
bool PLIB_IC_ExistsSyncMode(
IC_MODULE_ID index
);
Description
This function identifies whether the SyncMode feature is available on the IC module. When this function returns true, tthis
function is supported on the device:
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• PLIB_IC_SyncModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SyncMode feature is supported on the device
• false - If the SyncMode feature is not supported on the device
Remarks
None.
5.6.10.5.7.13 PLIB_IC_ExistsSyncModeInput Function
C
bool PLIB_IC_ExistsSyncModeInput(
IC_MODULE_ID index
);
Description
This function identifies whether the SyncModeInput feature is available on the IC module. When this function returns true, this
function is supported on the device:
• PLIB_IC_SyncModeInputSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SyncModeInput feature is supported on the device
• false - If the SyncModeInput feature is not supported on the device
Remarks
None.
5.6.10.5.7.14 PLIB_IC_ExistsTimerSelect Function
C
bool PLIB_IC_ExistsTimerSelect(
IC_MODULE_ID index
);
Description
This function identifies whether the TimerSelect feature is available on the IC module. When this function returns true, this
function is supported on the device:
• PLIB_IC_TimerSelect
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TimerSelect feature is supported on the device
• false - The TimerSelect feature is not supported on the device
Remarks
None.
5.6.10.5.7.15 PLIB_IC_ExistsTimerTriggered Function
C
bool PLIB_IC_ExistsTimerTriggered(
IC_MODULE_ID index
);
Description
This function identifies whether the TimerTriggered feature is available on the IC module. When this function returns true, this
function is supported on the device:
• PLIB_IC_TimerIsTriggered
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the TimerTriggered feature is supported on the device
• false - If the TimerTriggered feature is not supported on the device
Remarks
None.
5.6.10.6 Files
Files
Name Description
plib_ic.h This file contains the interface definition for the Input Capture (IC) peripheral
library.
Description
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5.6.10.6.1 plib_ic.h
IC Module Peripheral Library Interface Header
This library provides a low-level abstraction of the Input Capture (IC) module on Microchip microcontrollers with a convenient C
language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the
module's registers, thus hiding differences between one microcontroller variant and another.
Functions
Name Description
PLIB_IC_AlternateClockDisable Selects Timer 2/3.instead of the alternate clock source.
PLIB_IC_AlternateClockEnable Selects the alternate clock source.
PLIB_IC_Buffer16BitGet Obtains the 16-bit input capture buffer value.
PLIB_IC_Buffer32BitGet Obtains the 32-bit input capture buffer value.
PLIB_IC_BufferIsEmpty Checks whether the input capture buffer is empty.
PLIB_IC_BufferOverflowHasOccurred Checks whether an input capture buffer overflow has occurred.
PLIB_IC_BufferSizeSelect Sets the input capture buffer size.
PLIB_IC_ClockSourceSelect Selects the clock source for the IC module.
PLIB_IC_Disable Disables the IC module.
PLIB_IC_Enable Enables the IC module.
PLIB_IC_EventsPerInterruptSelect Selects the number of capture events before an interrupt is issued.
PLIB_IC_ExistsAlternateClock Identifies whether the AlternateClock feature exists on the IC module
PLIB_IC_ExistsBufferIsEmptyStatus Identifies whether the BufferIsEmptyStatus feature exists on the IC
module
PLIB_IC_ExistsBufferOverflowStatus Identifies whether the BufferOverflowStatus feature exists on the IC
module.
PLIB_IC_ExistsBufferSize Identifies whether the BufferSize feature exists on the IC module.
PLIB_IC_ExistsBufferValue Identifies whether the BufferValue feature exists on the IC module.
PLIB_IC_ExistsCaptureMode Identifies whether the CaptureMode feature exists on the IC module.
PLIB_IC_ExistsClockSource Identifies whether the ClockSource feature exists on the IC module.
PLIB_IC_ExistsEdgeCapture Identifies whether the EdgeCapture feature exists on the IC module.
PLIB_IC_ExistsEnable Identifies whether the EnableControl feature exists on the IC module
PLIB_IC_ExistsEventsPerInterruptSelect Identifies whether the EventsPerInterruptSelect feature exists on the IC
module.
PLIB_IC_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the IC module.
PLIB_IC_ExistsSyncMode Identifies whether the SyncMode feature exists on the IC module.
PLIB_IC_ExistsSyncModeInput Identifies whether the SyncModeInput feature exists on the IC module.
PLIB_IC_ExistsTimerSelect Identifies whether the TimerSelect feature exists on the IC module.
PLIB_IC_ExistsTimerTriggered Identifies whether the TimerTriggered feature exists on the IC module.
PLIB_IC_FirstCaptureEdgeSelect Captures the timer count value at the first selected edge of input signal.
PLIB_IC_ModeSelect Selects the input capture mode for IC module.
PLIB_IC_StopInIdleDisable Continues module operation when the device enters Idle mode
PLIB_IC_StopInIdleEnable Discontinues IC module operation when the device enters Idle mode.
PLIB_IC_SyncModeInputSelect Selects the input source for synchronous or asynchronous (triggered)
operation of the IC module.
PLIB_IC_SyncModeSelect Selects the synchronization mode for Input Capture module.
PLIB_IC_TimerIsTriggered Checks whether or not the input capture timer has been triggered.
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PLIB_IC_TimerSelect Selects the 16-bit timer source for the IC module.
File Name
plib_ic.h
Company
Microchip Technology Inc.
5.6.11 Interrupt Peripheral Library
5.6.11.1 Introduction
Interrupt Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Interrupt Controller module on Microchip microcontrollers with a convenient C
language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the
module's registers, thus hiding differences from one microcontroller variant to another.
Description
Interrupt Controller Overview
The Interrupt Controller is a key component of a microcontroller. The Interrupt Controller reduces the numerous peripheral
interrupt request signals to a single interrupt request signal to the microcontroller core.
The key features present on an Interrupt Controller are:
• Interrupt source configuration: Provides the ability to enable, disable, and prioritize a source that may interrupt the core
• Interrupt status flags: Identify the source of an interrupt request or exception, usually generated by a peripheral
The interrupt will be sent to the core, only if the source is enabled to generate an interrupt and interrupts have been enabled (if
supported). Sources will be prioritized so that the highest priority interrupt will be sent to the core if multiple sources cause
interrupts at the same time.
Many interrupt controllers also include, other optional features:
• Global enable configuration: Controls the generation of any interrupt to the core from the Interrupt Controller
• Choice of edge transition: Controls the edge transition (high-to-low or low-to-high) on which the interrupts are generated
• Priority configuration: Associates a programmable priority with the interrupt source
Interrupts can be handled inside the core in the following ways:
• Vectored: Each interrupt has an associated interrupt handler routine
• Non-vectored: All interrupts have a single (shared) interrupt handler routine. The software determines the interrupt source
based on the interrupt status-flags register.
• Combination of vectored and non-vectored: Interrupts combined in groups. Each group has a single common interrupt
vector or handler, but there are multiple groups (i.e., multiple vectors). Within a specific vector group, software determines
which one in the group sources caused the interrupt.
A microcontroller can support one, or more than one of the these modes.
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Note: Please refer to the the specific device data sheet to determine availability of these features for your device.
5.6.11.2 Release Notes
MPLAB Harmony Version: v0.70b Interrupt Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.11.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.11.4 Using the Library
This topic describes the basic architecture of the Interrupt Peripheral Library and provides information and examples on how to
use it.
Interface Header File: plib_int.h
The interface to the Interrupt Peripheral Library is defined in the "plib_int.h" header file. Any C language source (.c) file that uses
the Interrupt Peripheral Library should include "plib_int.h".
Library File:
The Interrupt Peripheral Library (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the peripheral interacts with the framework.
5.6.11.4.1 Hardware Abstraction Model
This library provides a low-level abstraction of the Interrupt Controller module on Microchip microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
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Description
Hardware Abstraction Model
The Interrupt Controller receives requests from multiple Interrupt Sources. The Interrupt Controller Configuration controls
the overall operation of the interrupt controller. Not all microcontrollers support all the features listed below:
• Interrupt nesting configuration
• Edge selection of the external interrupts
• Vector mode selection
• Priority level configuration
• Current CPU interrupt and priority status information
Source Enable Configuration enables or disables a particular source. On some microcontrollers other CPU exceptions or traps
can also be controlled. Source Status Flags give the status of the interrupt request from a specific interrupt source.
Other optional features include the Vector Priority Configuration, which is available on some micro controllers and the
Proximity Timer. Priority configuration allows a priority level to be associated with each interrupt vector. The proximity timer
creates a temporal window in which a group of interrupts of the same, or lower, priority will be held off. This provides an
opportunity to queue these interrupt requests and process them using tail-chaining of multiple IRQs and allows higher priority
interrupts to pass through during the hold-off window.
Traps and Exceptions
Some of the things that can interrupt the normal flow of instruction execution of the CPU core are not actual interrupt sources.
These are things such as a division-by-zero error or attempting to address unimplemented memory. These errors are either
internal to the CPU core itself or are so catastrophic that they are non-maskable and are trapped separately. This library refers to
them in general as "traps" and there are interface elements provided to allow software to handle them.
5.6.11.4.2 Library Usage Model
This section provides library usage model information.
Description
The following diagram shows the major components of the usage model.
Usage Model
Each of the blocks in the diagram correspond to the library interface section.
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Library Interface Section Description
General Configuration Functions Provides setup, configuration, and status interface routines for the overall operation
of the Interrupt Controller module.
5.6.11.4.3 How the Library Works
This section provides information on initialization and interrupt source setup and handling.
Description
Initialization
The steps that are required to initialize the Interrupt Controller module vary for different microcontrollers.
Note: Refer to the specific device data sheet for the correct initialization sequence for your device.
Interrupt Source Setup
An interrupt Source needs to be enabled in order for it to be able to generate a interrupt to the core. Use the function
PLIB_INT_SourceEnable to enable the interrupt source. INT_SOURCE is a list of the possible interrupt sources
On some microcontrollers, each interrupt vector can be associated with a priority. Use the function PLIB_INT_VectorPrioritySet
to set the interrupt vector priority. INT_VECTOR is a list of the possible interrupt vectors and INT_PRIORITY_LEVEL is the list of
possible priority levels.
On some microcontrollers, each interrupt vector can be associated with a sub-priority. Use the function
PLIB_INT_VectorSubPrioritySet to set the interrupt source sub-priority. INT_SUBPRIORITY_LEVEL is a list of possible
sub-priority levels.
On most microcontrollers, it will be necessary to enable interrupt generation to the core by calling the PLIB_INT_Enable function.
Interrupt Handling
The status of the interrupt indicates whether or not the interrupt request was generated by the source. The status of the trap
source can be obtained using the function PLIB_INT_TrapSourceFlagGet and the status of the interrupt source can be obtained
using the function PLIB_INT_SourceFlagGet. The interrupt status flags can be used to indicate the interrupt status even if the
interrupt is not enabled for the source. When the interrupt is not enabled for the source, no interrupt is generated to the core
even though the interrupt controller still recognizes that the source requested an interrupt. INT_TRAP_SOURCE is a list of
possible trap events, and INT_SOURCE is a list of possible interrupt sources.
Before the Interrupt Service Routine (ISR) ends, the status of the interrupt needs to be cleared to avoid entering the ISR
repeatedly for the same interrupt event. A trap source status can be cleared using the function PLIB_INT_TrapSourceFlagClear,
and an interrupt source status can be cleared using the function PLIB_INT_SourceFlagClear. INT_TRAP_SOURCE is a list of
possible trap events, and INT_SOURCE is a list of possible interrupt sources.
5.6.11.5 Configuring the Library
The library is configured for the supported Interrupt Peripheral Library.
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5.6.11.6 Library Interface
Data Types and Constants
Name Description
INT_EXTERNAL_SOURCES Lists the possible external sources that can cause an interrupt to occur.
INT_PRIORITY_LEVEL Lists the possible interrupt priority levels
INT_SOURCE Lists the possible sources that can cause an interrupt to occur
INT_SUBPRIORITY_LEVEL Lists the possible interrupt sub priority levels
INT_TRAP_SOURCE Lists the names of the trap or exception sources
INT_VECTOR Lists the possible interrupt vectors.
Feature Existence Functions
Name Description
PLIB_INT_ExistsAlternateVectorTable Identifies whether the AlternateVectorTable feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsCPUCurrentPriorityLevel Identifies whether the CPUCurrentPriorityLevel feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsEnableControl Identifies whether the EnableControl feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsExternalINTEdgeSelect Identifies whether the ExternalINTEdgeSelect feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsHighPriority Identifies whether the HighPriority feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsINTCPUPriority Identifies whether the INTCPUPriority feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsINTCPUVector Identifies whether the INTCPUVector feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsINTNesting Identifies whether the INTNesting feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsLowPriority Identifies whether the LowPriority feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsPeripheralControl Identifies whether the PeripheralControl feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsPriority Identifies whether the Priority feature exists on the Interrupt Controller
module.
PLIB_INT_ExistsProximityTimerControl Identifies whether the ProximityTimerControl feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsProximityTimerEnable Identifies whether the ProximityTimerEnable feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsSingleVectorShadowSet Identifies whether the SingleVectorShadowSet feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsSourceControl Identifies whether the SourceControl feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsSourceFlag Identifies whether the SourceFlag feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsTrapSource Identifies whether the TrapSource feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsVectorPriority Identifies whether the VectorPriority feature exists on the Interrupt
Controller module.
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PLIB_INT_ExistsVectorSelect Identifies whether the VectorSelect feature exists on the Interrupt
Controller module.
General Configuration Functions
Name Description
PLIB_INT_AlternateVectorTableSelect Enables the use of the alternate vector table.
PLIB_INT_Disable Disables the generation of interrupts to the CPU.
PLIB_INT_DISIStatusGet Returns the status of the DISI instruction status.
PLIB_INT_Enable Enables the generation of interrupts to the CPU.
PLIB_INT_ExternalFallingEdgeSelect Selects the falling edge as the edge polarity of the external interrupt.
PLIB_INT_ExternalRisingEdgeSelect Selects the rising edge as the edge polarity of the external interrupt.
PLIB_INT_IsEnabled Identifies if interrupts are currently enabled or disabled at the top level.
PLIB_INT_MultiVectorSelect Configures the Interrupt Controller for Multiple Vector mode.
PLIB_INT_NestingDisable Disables interrupt nesting.
PLIB_INT_NestingEnable Enables interrupt nesting.
PLIB_INT_PeripheralsDisable Disables the generation of interrupts to the CPU by the peripherals.
PLIB_INT_PeripheralsEnable Enables the generation of interrupts to the CPU by the peripherals.
PLIB_INT_PriorityDisable Disables interrupt priority levels.
PLIB_INT_PriorityEnable Enables interrupt priority levels.
PLIB_INT_PriorityGet Returns the priority level of the latest interrupt presented to the CPU.
PLIB_INT_PriorityHighDisable Disables the generation of high-priority interrupts to the CPU.
PLIB_INT_PriorityHighEnable Enables the generation of high-priority interrupts to the CPU.
PLIB_INT_PriorityLowDisable Disables the generation of low-priority interrupts to the CPU.
PLIB_INT_PriorityLowEnable Enables generation of low-priority interrupts to the CPU.
PLIB_INT_ProximityTimerDisable Disables the interrupt temporal-proximity timer.
PLIB_INT_ProximityTimerEnable Enables the interrupt temporal-proximity timer and selects the priority
levels that start the timer.
PLIB_INT_SingleVectorSelect Configures the Interrupt Controller for Single Vector mode.
PLIB_INT_SingleVectorShadowSetDisable Disables the Shadow Register Set in Single Vector mode.
PLIB_INT_SingleVectorShadowSetEnable Enables the Shadow Register Set in Single Vector mode.
PLIB_INT_StandardVectorTableSelect Enables the use of the standard vector table.
Interrupt Source Control Functions
Name Description
PLIB_INT_SourceDisable Disables the interrupt source
PLIB_INT_SourceEnable Enables the interrupt source.
This section provides information on initialization and interrupt source setup and
handling.
PLIB_INT_SourceFlagClear Clears the status of the interrupt flag for the selected source.
PLIB_INT_SourceFlagGet Returns the status of the interrupt flag for the selected source.
PLIB_INT_SourceFlagSet Sets the status of the interrupt flag for the selected source.
PLIB_INT_SourceIsEnabled Gets the enable state of the interrupt source.
PLIB_INT_VectorPriorityGet Gets the priority of the interrupt vector.
PLIB_INT_VectorPrioritySet Sets the priority of the interrupt vector.
PLIB_INT_VectorSubPriorityGet Gets the sub-priority of the interrupt vector.
PLIB_INT_VectorSubPrioritySet Sets the sub-priority of the interrupt vector.
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Other Status and Control Functions
Name Description
PLIB_INT_CPUCurrentPriorityLevelGet Gets the interrupt priority level at which the CPU is currently operating.
PLIB_INT_ProximityTimerGet Returns the value used by the temporal proximity timer as a reload value
when the temporal proximity timer is triggered by an interrupt event.
PLIB_INT_ProximityTimerSet Sets the temporal proximity timer reload value. This value is used to
reload the proximity timer after it has been triggered by an interrupt event.
PLIB_INT_TrapSourceFlagClear Clears the flag for the selected trap.
PLIB_INT_TrapSourceFlagGet Returns the status of the flag for the selected trap.
PLIB_INT_VectorGet Returns the interrupt vector that is presented to the CPU.
Description
This section provides descriptions and examples for the functions provided in the Interrupt Peripheral Library.
5.6.11.6.1 General Configuration Functions
5.6.11.6.1.1 PLIB_INT_AlternateVectorTableSelect Function
C
void PLIB_INT_AlternateVectorTableSelect(
INT_MODULE_ID index
);
Description
This function enables the processor to use the alternate vector table instead of the default vector table. If the alternate vector
table is enabled using this function, all interrupt and exception processing uses the alternate vectors instead of the default
vectors. The alternate vectors are organized in the same manner as the default vectors.
Alternate vectors support emulation and debugging by providing a means to switch between an application and support
environment, without requiring the interrupt vectors to be reprogrammed. This feature can also be used to enable switching
between different software algorithms during run time for evaluation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
None.
Remarks
This function implements an operation of the AlternateVectorTable feature. This feature may not be available on all parts. Please
refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsAlternateVectorTable API to write
flexible code to automatically determine if this feature is available.
Example
PLIB_INT_AlternateVectorTableSelect( INT_ID_0 );
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5.6.11.6.1.2 PLIB_INT_Disable Function
C
void PLIB_INT_Disable(
INT_MODULE_ID index
);
Description
This function disables the generation of interrupts to the CPU.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only one interrupt module ).
Returns
None.
Remarks
This function implements an operation of the EnableControl feature. This feature may not be available on all parts. Please refer
to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsEnableControl API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_Disable( INT_ID_0 );
5.6.11.6.1.3 PLIB_INT_DISIStatusGet Function
C
bool PLIB_INT_DISIStatusGet(
INT_MODULE_ID index
);
Description
This function returns the status of the DISI instruction status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only one interrupt module ).
Returns
• true - If DISI is active
• false - If DISI is not active
Remarks
This function implements an operation of the DISI feature. This feature may not be available on all parts. Please refer to the data
sheet to determine if this feature is available or call the PLIB_INT_ExistsDISI API to write flexible code to automatically
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determine if this feature is available.
Example
PLIB_INT_DISIStatusGet( INT_ID_0 );
5.6.11.6.1.4 PLIB_INT_Enable Function
C
void PLIB_INT_Enable(
INT_MODULE_ID index
);
Description
This function enables the generation of interrupts to the CPU.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
None.
Remarks
This function implements an operation of the EnableControl feature. This feature may not be available on all parts. Please refer
to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsEnableControl API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_Enable( INT_ID_0 );
5.6.11.6.1.5 PLIB_INT_ExternalFallingEdgeSelect Function
C
void PLIB_INT_ExternalFallingEdgeSelect(
INT_MODULE_ID index,
INT_EXTERNAL_SOURCES source
);
Description
This function selects the falling edge as the edge polarity of the external interrupt.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
source One or more of the values from INT_EXTERNAL_SOURCES. Values can be
combined using a bitwise "OR" operation.
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Returns
None.
Remarks
This function implements an operation of the ExternalINTEdgeSelect feature. This feature may not be available on all parts.
Please refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsExternalINTEdgeSelect API to
write flexible code to automatically determine if this feature is available.
Example
PLIB_INT_ExternalFallingEdgeSelect( INT_ID_0,
(INT_EXTERNAL_INT_SOURCE0 |
INT_EXTERNAL_INT_SOURCE1) );
5.6.11.6.1.6 PLIB_INT_ExternalRisingEdgeSelect Function
C
void PLIB_INT_ExternalRisingEdgeSelect(
INT_MODULE_ID index,
INT_EXTERNAL_SOURCES source
);
Description
This function selects the rising edge as the edge polarity of the external interrupt.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
source One or more of the values from INT_EXTERNAL_SOURCES. Values can be
combined using a bitwise "OR" operation.
Returns
None.
Remarks
This function implements an operation of the ExternalINTEdgeSelect feature. This feature may not be available on all parts.
Please refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsExternalINTEdgeSelect API to
write flexible code to automatically determine if this feature is available.
Example
PLIB_INT_ExternalRisingEdgeSelect( INT_ID_0,
( INT_EXTERNAL_INT_SOURCE0 |
INT_EXTERNAL_INT_SOURCE1 ) );
5.6.11.6.1.7 PLIB_INT_IsEnabled Function
C
bool PLIB_INT_IsEnabled(
INT_MODULE_ID index
);
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Description
This function identifies if interrupts are enabled or disabled at the top level.
Preconditions
None.
Returns
• true - If the interrupts are currently enabled
• false - If the interrupts are currently disabled
Remarks
This function implements an operation of the EnableControl feature. This feature may not be available on all parts. Please refer
to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsEnableControl API to write flexible code to
automatically determine if this feature is available.
Example
status = PLIB_INT_IsEnabled( INT_ID_0 );
5.6.11.6.1.8 PLIB_INT_MultiVectorSelect Function
C
void PLIB_INT_MultiVectorSelect(
INT_MODULE_ID index
);
Description
This function configures the Interrupt Controller for Multiple Vector mode. Interrupt requests will serviced at the calculated vector
addresses. The CPU vectors to the unique address for each vector number.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
None.
Remarks
While the user can, during run-time, reconfigure the interrupt controller from Single Vector mode to Multiple Vector mode, such
action is strongly discouraged, as it may result in undefined behavior.
This function implements an operation of the VectorSelect feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsVectorSelect API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_MultiVectorSelect( INT_ID_0 );
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5.6.11.6.1.9 PLIB_INT_NestingDisable Function
C
void PLIB_INT_NestingDisable(
INT_MODULE_ID index
);
Description
This function disables interrupt nesting on processors that support it.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
None.
Remarks
This function implements an operation of the INTNesting feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsINTNesting API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_NestingDisable( INT_ID_0 );
5.6.11.6.1.10 PLIB_INT_NestingEnable Function
C
void PLIB_INT_NestingEnable(
INT_MODULE_ID index
);
Description
This function enables interrupt nesting on processors that support it.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
None.
Remarks
This function implements an operation of the INTNesting feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsINTNesting API to write flexible code to
automatically determine if this feature is available.
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Example
PLIB_INT_NestingEnable( INT_ID_0 );
5.6.11.6.1.11 PLIB_INT_PeripheralsDisable Function
C
void PLIB_INT_PeripheralsDisable(
INT_MODULE_ID index
);
Description
This function disables the generation of interrupts to the CPU by the peripherals on devices that support this feature.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the PeripheralControl feature. This feature may not be available on all parts. Please
refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsPeripheralControl API to write flexible
code to automatically determine if this feature is available.
Example
PLIB_INT_PeripheralsDisable( INT_ID_0 );
5.6.11.6.1.12 PLIB_INT_PeripheralsEnable Function
C
void PLIB_INT_PeripheralsEnable(
INT_MODULE_ID index
);
Description
This function enables the generation of interrupts to the CPU by the peripherals on devices with the ability to disable them.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the PeripheralControl feature. This feature may not be available on all parts. Please
refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsPeripheralControl API to write flexible
code to automatically determine if this feature is available.
Example
PLIB_INT_PeripheralsEnable( INT_ID_0 );
5.6.11.6.1.13 PLIB_INT_PriorityDisable Function
C
void PLIB_INT_PriorityDisable(
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INT_MODULE_ID index
);
Description
This function disables interrupt priority levels on devices that support programmable interrupt priorities.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only one interrupt module ).
Returns
None.
Remarks
This function implements an operation of the Priority feature. This feature may not be available on all parts. Please refer to the
data sheet to determine if this feature is available or call the PLIB_INT_ExistsPriority API to write flexible code to automatically
determine if this feature is available.
Example
PLIB_INT_PriorityDisable( INT_ID_0 );
5.6.11.6.1.14 PLIB_INT_PriorityEnable Function
C
void PLIB_INT_PriorityEnable(
INT_MODULE_ID index
);
Description
This function enables interrupt priority levels on devices that support programmable interrupt priorities.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only one interrupt module ).
Returns
None.
Remarks
This function implements an operation of the Priority feature. This feature may not be available on all parts. Please refer to the
data sheet to determine if this feature is available or call the PLIB_INT_ExistsPriority API to write flexible code to automatically
determine if this feature is available.
Example
PLIB_INT_PriorityEnable( INT_ID_0 );
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5.6.11.6.1.15 PLIB_INT_PriorityGet Function
C
INT_PRIORITY_LEVEL PLIB_INT_PriorityGet(
INT_MODULE_ID index
);
Description
This function returns the priority level of the latest interrupt presented to the CPU.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
One of the possible values from INT_PRIORITY_LEVEL.
Remarks
This value should only be used when the interrupt controller is configured for single vector mode using the function
PLIB_INT_SingleVectorSelect.
This function implements an operation of the INTCPUPriority feature. This feature may not be available on all parts. Please refer
to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsINTCPUPriority API to write flexible code to
automatically determine if this feature is available.
Example
INT_PRIORITY_LEVEL level = PLIB_INT_RequestedPriorityLevelGet( INT_ID_0 );
5.6.11.6.1.16 PLIB_INT_PriorityHighDisable Function
C
void PLIB_INT_PriorityHighDisable(
INT_MODULE_ID index
);
Description
This function disables the generation of high-priority interrupts to the CPU on devices that support high-priority interrupts.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only one interrupt module ).
Returns
None.
Remarks
This function implements an operation of the HighPriority feature. This feature may not be available on all parts. Please refer to
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
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the data sheet to determine if this feature is available or call the PLIB_INT_ExistsHighPriority API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_PriorityHighDisable( INT_ID_0 );
5.6.11.6.1.17 PLIB_INT_PriorityHighEnable Function
C
void PLIB_INT_PriorityHighEnable(
INT_MODULE_ID index
);
Description
This function enables the generation of high-priority interrupts to the CPU on devices that support this feature.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the HighPriority feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsHighPriority API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_PriorityHighEnable( INT_ID_0 );
5.6.11.6.1.18 PLIB_INT_PriorityLowDisable Function
C
void PLIB_INT_PriorityLowDisable(
INT_MODULE_ID index
);
Description
This function disables the generation of low-priority interrupts to the CPU on devices that support this feature.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only one interrupt module ).
Returns
None.
Remarks
This function implements an operation of the LowPriority feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsLowPriority API to write flexible code to
automatically determine if this feature is available.
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Example
PLIB_INT_PriorityLowDisable( INT_ID_0 );
5.6.11.6.1.19 PLIB_INT_PriorityLowEnable Function
C
void PLIB_INT_PriorityLowEnable(
INT_MODULE_ID index
);
Description
This function enables generation of low-priority interrupts to the CPU on devices that support this feature.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only one interrupt module ).
Returns
None.
Remarks
This function implements an operation of the LowPriority feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsLowPriority API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_PriorityLowEnable( INT_ID_0 );
5.6.11.6.1.20 PLIB_INT_ProximityTimerDisable Function
C
void PLIB_INT_ProximityTimerDisable(
INT_MODULE_ID index
);
Description
This function disables the interrupt temporal-proximity timer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
None.
Remarks
This function implements an operation of the ProximityTimerEnable feature. This feature may not be available on all parts.
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Please refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsProximityTimerEnable API to
write flexible code to automatically determine if this feature is available.
Example
PLIB_INT_ProximityTimerDisable(INT_PRIORITY_LEVEL3);
5.6.11.6.1.21 PLIB_INT_ProximityTimerEnable Function
C
void PLIB_INT_ProximityTimerEnable(
INT_MODULE_ID index,
INT_PRIORITY_LEVEL priority
);
Description
This function enables the interrupt temporal-proximity timer and selects the priority levels that start the timer. One of the possible
values from PLIB_INT_PRIORITY_LEVEL can be selected. Interrupts of that priority and lower start the temporal proximity timer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
priority One of possible values from INT_PRIORITY_LEVEL.
Returns
None.
Remarks
This function implements an operation of the ProximityTimerEnable feature. This feature may not be available on all parts.
Please refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsProximityTimerEnable API to
write flexible code to automatically determine if this feature is available.
Choosing INT_PRIORITY_0 disables the proximity timer (exactly the same as if PLIB_INT_ProximityTimerDisable had been
called.
Example
//Interrupts of group priority 3 or lower start the temporal proximity timer
PLIB_INT_ProximityTimerEnable( INT_ID_0, INT_PRIORITY_LEVEL3 );
5.6.11.6.1.22 PLIB_INT_SingleVectorSelect Function
C
void PLIB_INT_SingleVectorSelect(
INT_MODULE_ID index
);
Description
The function configures the Interrupt Controller for Single Vector mode. All interrupt requests will serviced at one vector address.
The CPU vectors to the same address for all interrupt sources.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
None.
Remarks
While the user can, during run-time, reconfigure the Interrupt Controller from Single Vector mode to Multiple Vector mode, such
action is strongly discouraged, as it may result in undefined behavior.
This function implements an operation of the VectorSelect feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsVectorSelect API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_SingleVectorSelect( INT_ID_0 );
5.6.11.6.1.23 PLIB_INT_SingleVectorShadowSetDisable Function
C
void PLIB_INT_SingleVectorShadowSetDisable(
INT_MODULE_ID index
);
Description
This function disables usage of the "shadow" set of processor registers when operating in Single Vector mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
None.
Remarks
This function implements an operation of the SingleVectorShadowSet feature. This feature may not be available on all parts.
Please refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsSingleVectorShadowSet API to
write flexible code to automatically determine if this feature is available.
Example
PLIB_INT_SingleVectorShadowSetEnable( INT_ID_0 );
5.6.11.6.1.24 PLIB_INT_SingleVectorShadowSetEnable Function
C
void PLIB_INT_SingleVectorShadowSetEnable(
INT_MODULE_ID index
);
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Description
This function enables usage of the "shadow" set of processor registers when operating in Single Vector mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
None.
Remarks
This function implements an operation of the SingleVectorShadowSet feature. This feature may not be available on all parts.
Please refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsSingleVectorShadowSet API to
write flexible code to automatically determine if this feature is available.
Example
PLIB_INT_SingleVectorShadowSetEnable( INT_ID_0 );
5.6.11.6.1.25 PLIB_INT_StandardVectorTableSelect Function
C
void PLIB_INT_StandardVectorTableSelect(
INT_MODULE_ID index
);
Description
This function enables use of the standard vector table. This is the default. It is only necessary to use this function if the alternate
vector table was enabled using the PLIB_INT_AlternateVectorTableSelect function.
Preconditions
None.
Returns
None.
Remarks
This function implements an operation of the AlternateVectorTable feature. This feature may not be available on all parts. Please
refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsAlternateVectorTable API to write
flexible code to automatically determine if this feature is available.
Example
PLIB_INT_StandardVectorTableSelect( INT_ID_0 );
5.6.11.6.2 Interrupt Source Control Functions
5.6.11.6.2.1 PLIB_INT_SourceDisable Function
C
void PLIB_INT_SourceDisable(
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INT_MODULE_ID index,
INT_SOURCE source
);
Description
This function disables the given interrupt source.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
source One of the possible values from INT_SOURCE.
Returns
None.
Remarks
This function implements an operation of the SourceControl feature. This feature may not be available on all parts. Please refer
to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsSourceControl API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_SourceDisable(INT_ID_0,INT_SOURCE_TIMER_1);
5.6.11.6.2.2 PLIB_INT_SourceEnable Function
C
void PLIB_INT_SourceEnable(
INT_MODULE_ID index,
INT_SOURCE source
);
Description
This function enables the interrupt source. The interrupt flag is set when the interrupt request is sampled. The pending interrupt
request will not cause further processing if the interrupt is not enabled using this function or if interrupts are not enabled (on
processors that support the PLIB_INT_Enable feature).
Initialization
The steps that are required to initialize the Interrupt Controller module vary for different microcontrollers.
Note: Refer to the specific device data sheet for the correct initialization sequence for your device.
Interrupt Source Setup <<<<<<< .mine
1. An interrupt Source needs to be enabled in order for it to be able to generate a interrupt to the core. Use the functions
PLIB_INT_SourceEnable to enable the interrupt source. INT_SOURCE is a list of possible interrupt sources
2. On some micro controllers, each interrupt can be associated with a priority. Use the function PLIB_INT_SourcePrioritySet to
set the interrupt source priority. INT_SOURCES is list of possible interrupt sources and INT_PRIORITY_LEVELS is the list of
possible priority levels.
3. On some micro controllers, each interrupt can be associated with a sub priority. Use the function
PLIB_INT_SourceSubPrioritySet to set the interrupt source sub priority. INT_SUBPRIORITY_LEVELS is a list of possible sub
priority levels.
4. On most microcontrollers, it will be necessary to enable interrupt generation to the core by calling the PLIB_INT_Enable
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routine.
=======
An interrupt Source needs to be enabled in order for it to be able to generate a interrupt to the core. Use the function
PLIB_INT_SourceEnable to enable the interrupt source. INT_SOURCE is a list of the possible interrupt sources
On some microcontrollers, each interrupt can be associated with a priority. Use the function PLIB_INT_VectorPrioritySet to set
the interrupt source priority. INT_SOURCE is a list of the possible interrupt sources and INT_PRIORITY_LEVEL is the list of
possible priority levels.
On some microcontrollers, each interrupt can be associated with a sub-priority. Use the function PLIB_INT_VectorSubPrioritySet
to set the interrupt source sub-priority. INT_SUBPRIORITY_LEVEL is a list of possible sub-priority levels.
On most microcontrollers, it will be necessary to enable interrupt generation to the core by calling the PLIB_INT_Enable function.
>>>>>>> .r21563 Interrupt Handling
The status of the interrupt indicates whether or not the interrupt request was generated by the source. The status of the trap
source can be obtained using the function PLIB_INT_TrapSourceFlagGet and the status of the interrupt source can be obtained
using the function PLIB_INT_SourceFlagGet. The interrupt status flags can be used to indicate the interrupt status even if the
interrupt is not enabled for the source. When the interrupt is not enabled for the source, no interrupt is generated to the core
even though the interrupt controller still recognizes that the source requested an interrupt. INT_TRAP_SOURCE is a list of
possible trap events, and INT_SOURCE is a list of possible interrupt sources.
Before the Interrupt Service Routine (ISR) ends, the status of the interrupt needs to be cleared to avoid entering the ISR
repeatedly for the same interrupt event. A trap source status can be cleared using the function PLIB_INT_TrapSourceFlagClear,
and an interrupt source status can be cleared using the function PLIB_INT_SourceFlagClear. INT_TRAP_SOURCE is a list of
possible trap events, and INT_SOURCE is a list of possible interrupt sources.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
source One of the possible values from INT_SOURCE.
Returns
None.
Remarks
This function implements an operation of the SourceControl feature. This feature may not be available on all parts. Please refer
to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsSourceControl API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_SourceEnable(INT_ID_0,INT_SOURCE_TIMER_1);
5.6.11.6.2.3 PLIB_INT_SourceFlagClear Function
C
void PLIB_INT_SourceFlagClear(
INT_MODULE_ID index,
INT_SOURCE source
);
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Description
This function clears the status of the interrupt flag for the selected source. The flag is set when the interrupt request is identified.
The pending interrupt request will not cause further processing if the interrupt is not enabled using the function
PLIB_INT_InterruptSourceEnable or if interrupts are not enabled (on processors that support the PLIB_INT_Enable feature).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
source One of the possible values from INT_SOURCE.
Returns
None.
Remarks
This function implements an operation of the SourceFlag feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsSourceFlag API to write flexible code to
automatically determine if this feature is available.
Example
if(PLIB_INT_SourceFlagGet(INT_ID_0,INT_SOURCE_TIMER_1))
{
PLIB_INT_SourceFlagClear(INT_ID_0,INT_SOURCE_TIMER_1);
}
5.6.11.6.2.4 PLIB_INT_SourceFlagGet Function
C
bool PLIB_INT_SourceFlagGet(
INT_MODULE_ID index,
INT_SOURCE source
);
Description
This function returns the status of the interrupt flag for the selected source. The flag is set when the interrupt request is
recognized. The pending interrupt request will not cause further processing if the interrupt is not enabled using the function
PLIB_INT_InterruptSourceEnable or if interrupts are not enabled (on processors that support the PLIB_INT_Enable feature).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
source One of the possible values from INT_SOURCE.
Returns
true - If the interrupt request is recognized for the source false - If the interrupt request is not recognized for the source
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Remarks
This function implements an operation of the SourceFlag feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsSourceFlag API to write flexible code to
automatically determine if this feature is available.
Example
if(PLIB_INT_SourceFlagGet(INT_ID_0, INT_SOURCE_TIMER_1))
{
PLIB_INT_SourceFlagClear(INT_ID_0, INT_SOURCE_TIMER_1);
}
5.6.11.6.2.5 PLIB_INT_SourceFlagSet Function
C
void PLIB_INT_SourceFlagSet(
INT_MODULE_ID index,
INT_SOURCE source
);
Description
This function sets the status of the interrupt flag for the selected source. This function will not be used during normal operation of
the system. It is used to generate test interrupts for debug and testing purposes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
source One of the possible values from INT_SOURCE.
Returns
None.
Remarks
This function implements an operation of the SourceFlag feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsSourceFlag API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_SourceFlagSet(INT_ID_0,INT_SOURCE_TIMER_1);
5.6.11.6.2.6 PLIB_INT_SourceIsEnabled Function
C
bool PLIB_INT_SourceIsEnabled(
INT_MODULE_ID index,
INT_SOURCE source
);
Description
This function gets the enable state of the interrupt source.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
source One of the possible values from INT_SOURCE.
Returns
• true - If the interrupt source is enabled
• false - If the interrupt source is disabled
Remarks
This function implements an operation of the SourceControl feature. This feature may not be available on all parts. Please refer
to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsSourceControl API to write flexible code to
automatically determine if this feature is available.
Example
if(PLIB_INT_SourceIsEnabled(INT_ID_0,INT_SOURCE_TIMER_1) != true)
{
PLIB_INT_SourceEnable(INT_ID_0,INT_SOURCE_TIMER_1);
}
5.6.11.6.2.7 PLIB_INT_VectorPriorityGet Function
C
INT_PRIORITY_LEVEL PLIB_INT_VectorPriorityGet(
INT_MODULE_ID index,
INT_VECTOR vector
);
Description
Gets the priority of the interrupt vector. The priority is one of the possible values from INT_PRIORITY_LEVEL
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
vector One of the possible values from INT_VECTOR
Returns
priority - One of the possible values from INT_PRIORITY_LEVEL
Remarks
This function implements an operation of the VectorPriority feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsVectorPriority API to write flexible code to
automatically determine if this feature is available.
Example
INT_PRIORITY_LEVEL level;
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level = PLIB_INT_VectorPriorityGet(INT_ID_0, INT_VECTOR_T1);
5.6.11.6.2.8 PLIB_INT_VectorPrioritySet Function
C
void PLIB_INT_VectorPrioritySet(
INT_MODULE_ID index,
INT_VECTOR vector,
INT_PRIORITY_LEVEL priority
);
Description
Sets the priority of the interrupt vector. The priority is one of the possible values from INT_PRIORITY_LEVEL.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
vector One of the possible values from INT_VECTOR
priority One of the possible values from INT_PRIORITY_LEVEL
Returns
None.
Remarks
This function implements an operation of the VectorPriority feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsVectorPriority API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_VectorPrioritySet(INT_ID_0, INT_VECTOR_T1, INT_PRIORITY_LEVEL_4);
5.6.11.6.2.9 PLIB_INT_VectorSubPriorityGet Function
C
INT_SUBPRIORITY_LEVEL PLIB_INT_VectorSubPriorityGet(
INT_MODULE_ID index,
INT_VECTOR vector
);
Description
This function gets the sub-priority of the interrupt vector. The priority is one of the possible values from
INT_SUBPRIORITY_LEVEL.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
vector One of the possible values from INT_VECTOR
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Returns
priority - One of the possible values from INT_SUBPRIORITY_LEVEL
Remarks
This function implements an operation of the VectorPriority feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsVectorPriority API to write flexible code to
automatically determine if this feature is available.
Example
INT_SUBPRIORITY_LEVEL level;
level = PLIB_INT_VectorSubPriorityGet(INT_ID_0, INT_VECTOR_T1);
5.6.11.6.2.10 PLIB_INT_VectorSubPrioritySet Function
C
void PLIB_INT_VectorSubPrioritySet(
INT_MODULE_ID index,
INT_VECTOR vector,
INT_SUBPRIORITY_LEVEL subPriority
);
Description
This function sets the sub priority of the interrupt vector. The sub-priority is one of the possible values from
INT_SUBPRIORITY_LEVEL.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
vector One of the possible values from INT_VECTOR
subPriority One of the possible values from INT_SUBPRIORITY_LEVEL
Returns
None.
Remarks
This function implements an operation of the VectorPriority feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsVectorPriority API to write flexible code to
automatically determine if this feature is available.
Example
PLIB_INT_VectorSubPrioritySet(INT_ID_0, INT_VECTOR_T1, INT_SUBPRIORITY_LEVEL_1);
5.6.11.6.3 Other Status and Control Functions
5.6.11.6.3.1 PLIB_INT_CPUCurrentPriorityLevelGet Function
C
INT_PRIORITY_LEVEL PLIB_INT_CPUCurrentPriorityLevelGet(
INT_MODULE_ID index
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);
Description
This function gets the interrupt priority level at which the CPU is currently operating.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
priority - The current interrupt priority of the CPU. Range (0 - 15)
Remarks
User interrupts are disabled when the CPU priority is more than 7.
This function implements an operation of the CPUCurrentPriorityLevel feature. This feature may not be available on all parts.
Please refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsCPUCurrentPriorityLevel API to
write flexible code to automatically determine if this feature is available.
Example
INT_PRIORITY_LEVEL currentCPUPriority;
currentCPUPriority = PLIB_INT_CPUCurrentPriorityLevelGet( INT_ID_0 );
5.6.11.6.3.2 PLIB_INT_ProximityTimerGet Function
C
uint32_t PLIB_INT_ProximityTimerGet(
INT_MODULE_ID index
);
Description
This function returns the value used by the temporal proximity timer as a reload value when the temporal proximity timer is
triggered by an interrupt event.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
Timer reload value.
Remarks
This function implements an operation of the ProximityTimerControl feature. This feature may not be available on all parts.
Please refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsProximityTimerControl API to
write flexible code to automatically determine if this feature is available.
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Example
uint32_t timer;
timer = PLIB_INT_ProximityTimerGet( INT_ID_0 );
5.6.11.6.3.3 PLIB_INT_ProximityTimerSet Function
C
void PLIB_INT_ProximityTimerSet(
INT_MODULE_ID index,
uint32_t timerreloadvalue
);
Description
This function sets the temporal proximity timer reload value. This value is used to reload the proximity timer after it has been
triggered by an interrupt event.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
timerReloadValue Timer reload value.
Returns
None.
Remarks
This function implements an operation of the ProximityTimerControl feature. This feature may not be available on all parts.
Please refer to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsProximityTimerControl API to
write flexible code to automatically determine if this feature is available.
Example
PLIB_INT_ProximityTimerSet(INT_ID_0, 0x12345678);
5.6.11.6.3.4 PLIB_INT_TrapSourceFlagClear Function
C
void PLIB_INT_TrapSourceFlagClear(
INT_MODULE_ID index,
INT_TRAP_SOURCE trapsource
);
Description
This function clears the flag for the selected trap. The flag is set when the request is recognized.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
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trapSource One of the possible values from INT_TRAP_SOURCE
Returns
None.
Remarks
Some processor documentation uses the term "Exception" instead of the term "Trap". For purposes of the Interrupt Peripheral
Library, these two terms are synonyms. The difference between a trap (or exception) and an interrupt is that a trap cannot be
enabled or disabled, whereas an interrupt can be.
This function implements an operation of the TrapSource feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsTrapSource API to write flexible code to
automatically determine if this feature is available.
Example
if(PLIB_INT_TrapSourceFlagGet(INT_ID_0,INT_ADDRESS_OVERFLOW_TRAP))
{
PLIB_INT_TrapSourceFlagClear(INT_ID_0,INT_ADDRESS_OVERFLOW_TRAP);
}
5.6.11.6.3.5 PLIB_INT_TrapSourceFlagGet Function
C
bool PLIB_INT_TrapSourceFlagGet(
INT_MODULE_ID index,
INT_TRAP_SOURCE trapSource
);
Description
This function returns the status of the flag for the selected trap. The flag is set when the trap request is recognized.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
trapSource One of the possible values from INT_TRAP_SOURCE
Returns
• true - If the request has been recognized for the trap
• false - If the request is not recognized for the trap
Remarks
Some processor documentation uses the term "Exception" instead of the term "Trap". For purposes of the Interrupt Peripheral
Library, these two terms are synonyms. The difference between a trap (or exception) and an interrupt is that a trap cannot be
enabled or disabled, whereas an interrupt can be.
This function implements an operation of the TrapSource feature. This feature may not be available on all parts. Please refer to
the data sheet to determine if this feature is available or call the PLIB_INT_ExistsTrapSource API to write flexible code to
automatically determine if this feature is available.
Example
if(PLIB_INT_TrapSourceFlagGet(INT_ID_0,INT_ADDRESS_OVERFLOW_TRAP))
{
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
5-2231
PLIB_INT_TrapSourceFlagClear(INT_ID_0,INT_ADDRESS_OVERFLOW_TRAP);
}
5.6.11.6.3.6 PLIB_INT_VectorGet Function
C
INT_VECTOR PLIB_INT_VectorGet(
INT_MODULE_ID index
);
Description
This function returns the interrupt vector that is presented to the CPU.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the module instance to be configured (it should be INT_ID_0 for all
the devices which has only interrupt module ).
Returns
One of the possible values from INT_VECTOR.
Remarks
This value should only be used when the interrupt controller is configured for single vector mode using the function
PLIB_INT_MultiVectorDisable.
This function implements an operation of the INTCPUVector feature. This feature may not be available on all parts. Please refer
to the data sheet to determine if this feature is available or call the PLIB_INT_ExistsINTCPUVector API to write flexible code to
automatically determine if this feature is available.
Example
INT_VECTOR level = PLIB_INT_VectorGet( INT_ID_0 );
5.6.11.6.4 Data Types and Constants
5.6.11.6.4.1 INT_EXTERNAL_SOURCES Enumeration
C
typedef enum {
INT_EXTERNAL_INT_SOURCE0,
INT_EXTERNAL_INT_SOURCE1,
INT_EXTERNAL_INT_SOURCE2,
INT_EXTERNAL_INT_SOURCE3,
INT_EXTERNAL_INT_SOURCE4
} INT_EXTERNAL_SOURCES;
Description
External Interrupt Sources
This enumeration lists the possible external sources that can cause an interrupt to occur.
Members
Members Description
INT_EXTERNAL_INT_SOURCE0 External Interrupt Source 0
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
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INT_EXTERNAL_INT_SOURCE1 External Interrupt Source 1
INT_EXTERNAL_INT_SOURCE2 External Interrupt Source 2
INT_EXTERNAL_INT_SOURCE3 External Interrupt Source 3
INT_EXTERNAL_INT_SOURCE4 External Interrupt Source 4
Remarks
This enumeration is processor-specific and is defined in the processor- specific header files (see processor.h).
5.6.11.6.4.2 INT_PRIORITY_LEVEL Enumeration
C
typedef enum {
INT_PRIORITY_LEVEL0,
INT_PRIORITY_LEVEL1,
INT_PRIORITY_LEVEL2,
INT_PRIORITY_LEVEL3,
INT_PRIORITY_LEVEL4,
INT_PRIORITY_LEVEL5,
INT_PRIORITY_LEVEL6,
INT_PRIORITY_LEVEL7
} INT_PRIORITY_LEVEL;
Description
Priority Level
This enumeration lists the possible interrupt priority levels that can be selected for each source.
Members
Members Description
INT_PRIORITY_LEVEL0 Disabled
INT_PRIORITY_LEVEL1 Priority 1
INT_PRIORITY_LEVEL2 Priority 2
INT_PRIORITY_LEVEL3 Priority 3
INT_PRIORITY_LEVEL4 Priority 4
INT_PRIORITY_LEVEL5 Priority 5
INT_PRIORITY_LEVEL6 Priority 6
INT_PRIORITY_LEVEL7 Priority 7
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.11.6.4.3 INT_SOURCE Enumeration
C
typedef enum {
INT_SOURCE_SOFTWARE_0,
INT_SOURCE_SOFTWARE_1,
INT_SOURCE_EXTERNAL_0,
INT_SOURCE_EXTERNAL_1,
INT_SOURCE_EXTERNAL_2,
INT_SOURCE_EXTERNAL_3,
INT_SOURCE_EXTERNAL_4,
INT_SOURCE_TIMER_CORE,
INT_SOURCE_TIMER_1,
INT_SOURCE_TIMER_2,
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
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INT_SOURCE_TIMER_3
,
INT_SOURCE_TIMER_4
,
INT_SOURCE_TIMER_5
,
INT_SOURCE_INPUT_CAPTURE_1
,
INT_SOURCE_INPUT_CAPTURE_1_ERROR
,
INT_SOURCE_INPUT_CAPTURE_2
,
INT_SOURCE_INPUT_CAPTURE_2_ERROR
,
INT_SOURCE_INPUT_CAPTURE_3
,
INT_SOURCE_INPUT_CAPTURE_3_ERROR
,
INT_SOURCE_INPUT_CAPTURE_4
,
INT_SOURCE_INPUT_CAPTURE_4_ERROR
,
INT_SOURCE_INPUT_CAPTURE_5
,
INT_SOURCE_INPUT_CAPTURE_5_ERROR
,
INT_SOURCE_OUTPUT_COMPARE_1
,
INT_SOURCE_OUTPUT_COMPARE_2
,
INT_SOURCE_OUTPUT_COMPARE_3
,
INT_SOURCE_OUTPUT_COMPARE_4
,
INT_SOURCE_OUTPUT_COMPARE_5
,
INT_SOURCE_SPI_1_ERROR
,
INT_SOURCE_SPI_1_RECEIVE
,
INT_SOURCE_SPI_1_TRANSMIT
,
INT_SOURCE_SPI_2_ERROR
,
INT_SOURCE_SPI_2_RECEIVE
,
INT_SOURCE_SPI_2_TRANSMIT
,
INT_SOURCE_SPI_3_ERROR
,
INT_SOURCE_SPI_3_RECEIVE
,
INT_SOURCE_SPI_3_TRANSMIT
,
INT_SOURCE_SPI_4_ERROR
,
INT_SOURCE_SPI_4_RECEIVE
,
INT_SOURCE_SPI_4_TRANSMIT
,
INT_SOURCE_USART_1_ERROR
,
INT_SOURCE_USART_1_RECEIVE
,
INT_SOURCE_USART_1_TRANSMIT
,
INT_SOURCE_USART_2_ERROR
,
INT_SOURCE_USART_2_RECEIVE
,
INT_SOURCE_USART_2_TRANSMIT
,
INT_SOURCE_USART_3_ERROR
,
INT_SOURCE_USART_3_RECEIVE
,
INT_SOURCE_USART_3_TRANSMIT
,
INT_SOURCE_USART_4_ERROR
,
INT_SOURCE_USART_4_RECEIVE
,
INT_SOURCE_USART_4_TRANSMIT
,
INT_SOURCE_USART_5_ERROR
,
INT_SOURCE_USART_5_RECEIVE
,
INT_SOURCE_USART_5_TRANSMIT
,
INT_SOURCE_USART_6_ERROR
,
INT_SOURCE_USART_6_RECEIVE
,
INT_SOURCE_USART_6_TRANSMIT
,
INT_SOURCE_I2C_1_ERROR
,
INT_SOURCE_I2C_1_SLAVE
,
INT_SOURCE_I2C_1_MASTER
,
INT_SOURCE_I2C_2_ERROR
,
INT_SOURCE_I2C_2_SLAVE
,
INT_SOURCE_I2C_2_MASTER
,
INT_SOURCE_I2C_3_ERROR
,
INT_SOURCE_I2C_3_SLAVE
,
INT_SOURCE_I2C_3_MASTER
,
INT_SOURCE_I2C_4_ERROR
,
INT_SOURCE_I2C_4_SLAVE
,
INT_SOURCE_I2C_4_MASTER
,
INT_SOURCE_I2C_5_ERROR
,
INT_SOURCE_I2C_5_SLAVE
,
INT_SOURCE_I2C_5_MASTER
,
INT_SOURCE_CHANGE_NOTICE
,
INT_SOURCE_ADC_1
,
INT_SOURCE_PARALLEL_PORT
,
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INT_SOURCE_PARALLEL_PORT_ERROR,
INT_SOURCE_COMPARATOR_1,
INT_SOURCE_COMPARATOR_2,
INT_SOURCE_CLOCK_MONITOR,
INT_SOURCE_RTCC,
INT_SOURCE_DMA_0,
INT_SOURCE_DMA_1,
INT_SOURCE_DMA_2,
INT_SOURCE_DMA_3,
INT_SOURCE_DMA_4,
INT_SOURCE_DMA_5,
INT_SOURCE_DMA_6,
INT_SOURCE_DMA_7,
INT_SOURCE_FLASH_CONTROL,
INT_SOURCE_USB_1,
INT_SOURCE_CAN_1,
INT_SOURCE_CAN_2,
INT_SOURCE_ETH_1
} INT_SOURCE;
Description
Interrupt Source
This enumeration lists the possible sources that can cause an interrupt to occur.
Members
Members Description
INT_SOURCE_SOFTWARE_0 Software interrupt 0
INT_SOURCE_SOFTWARE_1 Software interrupt 1
INT_SOURCE_EXTERNAL_0 External interrupt 0
INT_SOURCE_EXTERNAL_1 External interrupt 1
INT_SOURCE_EXTERNAL_2 External interrupt 2
INT_SOURCE_EXTERNAL_3 External interrupt 3
INT_SOURCE_EXTERNAL_4 External interrupt 4
INT_SOURCE_TIMER_CORE Core timer interrupt
INT_SOURCE_TIMER_1 Timer 1 interrupt
INT_SOURCE_TIMER_2 Timer 2 interrupt
INT_SOURCE_TIMER_3 Timer 3 interrupt
INT_SOURCE_TIMER_4 Timer 4 interrupt
INT_SOURCE_TIMER_5 Timer 5 interrupt
INT_SOURCE_INPUT_CAPTURE_1 Input Capture 1 interrupt
INT_SOURCE_INPUT_CAPTURE_1_ERROR Input Capture 1 Error interrupt
INT_SOURCE_INPUT_CAPTURE_2 Input Capture 2 interrupt
INT_SOURCE_INPUT_CAPTURE_2_ERROR Input Capture 2 Error interrupt
INT_SOURCE_INPUT_CAPTURE_3 Input Capture 3 interrupt
INT_SOURCE_INPUT_CAPTURE_3_ERROR Input Capture 3 Error interrupt
INT_SOURCE_INPUT_CAPTURE_4 Input Capture 4 interrupt
INT_SOURCE_INPUT_CAPTURE_4_ERROR Input Capture 4 Error interrupt
INT_SOURCE_INPUT_CAPTURE_5 Input Capture 5 interrupt
INT_SOURCE_INPUT_CAPTURE_5_ERROR Input Capture 5 Error interrupt
INT_SOURCE_OUTPUT_COMPARE_1 Output Compare 1 interrupt
INT_SOURCE_OUTPUT_COMPARE_2 Output Compare 2 interrupt
INT_SOURCE_OUTPUT_COMPARE_3 Output Compare 3 interrupt
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INT_SOURCE_OUTPUT_COMPARE_4 Output Compare 4 interrupt
INT_SOURCE_OUTPUT_COMPARE_5 Output Compare 5 interrupt
INT_SOURCE_SPI_1_ERROR SPI-1 Error interrupt
INT_SOURCE_SPI_1_RECEIVE SPI-1 Receive Done interrupt
INT_SOURCE_SPI_1_TRANSMIT SPI-1 Transmit Done interrupt
INT_SOURCE_SPI_2_ERROR SPI-2 Error interrupt
INT_SOURCE_SPI_2_RECEIVE SPI-2 Receive Done interrupt
INT_SOURCE_SPI_2_TRANSMIT SPI-2 Transmit Done interrupt
INT_SOURCE_SPI_3_ERROR SPI-3 Error interrupt
INT_SOURCE_SPI_3_RECEIVE SPI-3 Receive Done interrupt
INT_SOURCE_SPI_3_TRANSMIT SPI-3 Transmit Done interrupt
INT_SOURCE_SPI_4_ERROR SPI-4 Error interrupt
INT_SOURCE_SPI_4_RECEIVE SPI-4 Receive Done interrupt
INT_SOURCE_SPI_4_TRANSMIT SPI-4 Transmit Done interrupt
INT_SOURCE_USART_1_ERROR UART-1 Error interrupt
INT_SOURCE_USART_1_RECEIVE UART-1 Receive interrupt
INT_SOURCE_USART_1_TRANSMIT UART-1 Transmit interrupt
INT_SOURCE_USART_2_ERROR UART-2 Error interrupt
INT_SOURCE_USART_2_RECEIVE UART-2 Receive interrupt
INT_SOURCE_USART_2_TRANSMIT UART-2 Transmit interrupt
INT_SOURCE_USART_3_ERROR UART-3 Error interrupt
INT_SOURCE_USART_3_RECEIVE UART-3 Receive interrupt
INT_SOURCE_USART_3_TRANSMIT UART-3 Transmit interrupt
INT_SOURCE_USART_4_ERROR UART-4 Error interrupt
INT_SOURCE_USART_4_RECEIVE UART-4 Receive interrupt
INT_SOURCE_USART_4_TRANSMIT UART-4 Transmit interrupt
INT_SOURCE_USART_5_ERROR UART-5 Error interrupt
INT_SOURCE_USART_5_RECEIVE UART-5 Receive interrupt
INT_SOURCE_USART_5_TRANSMIT UART-5 Transmit interrupt
INT_SOURCE_USART_6_ERROR UART-6 Error interrupt
INT_SOURCE_USART_6_RECEIVE UART-6 Receive interrupt
INT_SOURCE_USART_6_TRANSMIT UART-6 Transmit interrupt
INT_SOURCE_I2C_1_ERROR I2C-1 Bus Error Event interrupt
INT_SOURCE_I2C_1_SLAVE I2C-1 Slave Event interrupt
INT_SOURCE_I2C_1_MASTER I2C-1 Master Event interrupt
INT_SOURCE_I2C_2_ERROR I2C-2 Bus Error Event interrupt
INT_SOURCE_I2C_2_SLAVE I2C-2 Slave Event interrupt
INT_SOURCE_I2C_2_MASTER I2C-2 Master Event interrupt
INT_SOURCE_I2C_3_ERROR I2C-3 Bus Error Event interrupt
INT_SOURCE_I2C_3_SLAVE I2C-3 Slave Event interrupt
INT_SOURCE_I2C_3_MASTER I2C-3 Master Event interrupt
INT_SOURCE_I2C_4_ERROR I2C-4 Bus Error Event interrupt
INT_SOURCE_I2C_4_SLAVE I2C-4 Slave Event interrupt
INT_SOURCE_I2C_4_MASTER I2C-4 Master Event interrupt
INT_SOURCE_I2C_5_ERROR I2C-5 Bus Error Event interrupt
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
5-2236
INT_SOURCE_I2C_5_SLAVE I2C-5 Slave Event interrupt
INT_SOURCE_I2C_5_MASTER I2C-5 Master Event interrupt
INT_SOURCE_CHANGE_NOTICE Input Change Notice interrupt
INT_SOURCE_ADC_1 Analog-to-Digital Converter 1 interrupt
INT_SOURCE_PARALLEL_PORT Parallel Master Port interrupt
INT_SOURCE_PARALLEL_PORT_ERROR Parallel Master Port Error interrupt
INT_SOURCE_COMPARATOR_1 Comparator 1 interrupt
INT_SOURCE_COMPARATOR_2 Comparator 2 interrupt
INT_SOURCE_CLOCK_MONITOR Fail-Safe Clock Monitor interrupt
INT_SOURCE_RTCC Real-Time Clock and Calender interrupt
INT_SOURCE_DMA_0 Direct Memory Access Channel 0 interrupt
INT_SOURCE_DMA_1 Direct Memory Access Channel 1 interrupt
INT_SOURCE_DMA_2 Direct Memory Access Channel 2 interrupt
INT_SOURCE_DMA_3 Direct Memory Access Channel 3 interrupt
INT_SOURCE_DMA_4 Direct Memory Access Channel 4 interrupt
INT_SOURCE_DMA_5 Direct Memory Access Channel 5 interrupt
INT_SOURCE_DMA_6 Direct Memory Access Channel 6 interrupt
INT_SOURCE_DMA_7 Direct Memory Access Channel 7 interrupt
INT_SOURCE_FLASH_CONTROL Flash Control Event interrupt
INT_SOURCE_USB_1 Universal Serial Bus 1 interrupt
INT_SOURCE_CAN_1 Controller Area Network 1 interrupt
INT_SOURCE_CAN_2 Controller Area Network 2 interrupt
INT_SOURCE_ETH_1 Ethernet interrupt
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.11.6.4.4 INT_SUBPRIORITY_LEVEL Enumeration
C
typedef enum {
INT_SUBPRIORITY_LEVEL0,
INT_SUBPRIORITY_LEVEL1,
INT_SUBPRIORITY_LEVEL2,
INT_SUBPRIORITY_LEVEL3
} INT_SUBPRIORITY_LEVEL;
Description
Sub Priority Level
This enumeration lists the possible interrupt sub priority levels that can be selected for each source.
Members
Members Description
INT_SUBPRIORITY_LEVEL0 Sub Priority 0
INT_SUBPRIORITY_LEVEL1 Sub Priority 1
INT_SUBPRIORITY_LEVEL2 Sub Priority 2
INT_SUBPRIORITY_LEVEL3 Sub Priority 3
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
5-2237
Remarks
This enumeration (INT_SUBPRIORITY_LEVEL) is processor specific and is defined in the processor-specific header files (see
processor.h).
5.6.11.6.4.5 INT_TRAP_SOURCE Enumeration
C
typedef enum {
INT_TRAP_ADDRESS_ERROR_LOAD,
INT_TRAP_ADDRESS_ERROR_STORE,
INT_TRAP_BUS_ERROR_INSTRUCTION,
INT_TRAP_BUS_ERROR_DATA,
INT_TRAP_SYSCALL,
INT_TRAP_BREAKPOINT,
INT_TRAP_RESERVED_INSTRUCTION,
INT_TRAP_UNUSABLE_COPROCESSOR,
INT_TRAP_ARITHMETIC_OVERFLOW,
INT_TRAP_GENERAL
} INT_TRAP_SOURCE;
Description
Trap Source
This enumeration lists the names of the trap or exception sources.
Members
Members Description
INT_TRAP_ADDRESS_ERROR_LOAD Address error exception on a data load or instruction fetch
INT_TRAP_ADDRESS_ERROR_STORE Address error exception on a data store
INT_TRAP_BUS_ERROR_INSTRUCTION Bus error exception on an instruction fetch
INT_TRAP_BUS_ERROR_DATA Bus error exception on a data load or store
INT_TRAP_SYSCALL Exception do to a Syscall instruction
INT_TRAP_BREAKPOINT Exception do to hitting a debug breakpoint
INT_TRAP_RESERVED_INSTRUCTION Exception do to fetching a reserved instruction
INT_TRAP_UNUSABLE_COPROCESSOR Exception do to fetching a reference to an unusable coprocessor
INT_TRAP_ARITHMETIC_OVERFLOW Arithmetic Overflow exception
INT_TRAP_GENERAL General exception trap
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.11.6.4.6 INT_VECTOR Enumeration
C
typedef enum {
INT_VECTOR_CT,
INT_VECTOR_CS0,
INT_VECTOR_CS1,
INT_VECTOR_INT0,
INT_VECTOR_T1,
INT_VECTOR_IC1,
INT_VECTOR_OC1,
INT_VECTOR_INT1,
INT_VECTOR_T2,
INT_VECTOR_IC2,
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5-2238
INT_VECTOR_OC2,
INT_VECTOR_INT2,
INT_VECTOR_T3,
INT_VECTOR_IC3,
INT_VECTOR_OC3,
INT_VECTOR_INT3,
INT_VECTOR_T4,
INT_VECTOR_IC4,
INT_VECTOR_OC4,
INT_VECTOR_INT4,
INT_VECTOR_T5,
INT_VECTOR_IC5,
INT_VECTOR_OC5,
INT_VECTOR_SPI1,
INT_VECTOR_UART1,
INT_VECTOR_SPI3,
INT_VECTOR_I2C3,
INT_VECTOR_I2C1,
INT_VECTOR_CN,
INT_VECTOR_AD1,
INT_VECTOR_PMP,
INT_VECTOR_CMP1,
INT_VECTOR_CMP2,
INT_VECTOR_UART3,
INT_VECTOR_SPI2,
INT_VECTOR_I2C4,
INT_VECTOR_UART2,
INT_VECTOR_SPI4,
INT_VECTOR_I2C5,
INT_VECTOR_I2C2,
INT_VECTOR_FSCM,
INT_VECTOR_RTCC,
INT_VECTOR_DMA0,
INT_VECTOR_DMA1,
INT_VECTOR_DMA2,
INT_VECTOR_DMA3,
INT_VECTOR_DMA4,
INT_VECTOR_DMA5,
INT_VECTOR_DMA6,
INT_VECTOR_DMA7,
INT_VECTOR_FCE,
INT_VECTOR_USB,
INT_VECTOR_CAN1,
INT_VECTOR_CAN2,
INT_VECTOR_ETH,
INT_VECTOR_UART4,
INT_VECTOR_UART6,
INT_VECTOR_UART5
} INT_VECTOR;
Description
Interrupt Vectors
This enumeration lists the possible interrupt vectors.
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.11.6.5 Feature Existence Functions
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
5-2239
5.6.11.6.5.1 PLIB_INT_ExistsAlternateVectorTable Function
C
bool PLIB_INT_ExistsAlternateVectorTable(
INT_MODULE_ID index
);
Description
This function identifies whether the AlternateVectorTable feature is available on the Interrupt Controller module. When this
function returns true, these functions are supported on the device:
• PLIB_INT_AlternateVectorTableSelect
• PLIB_INT_StandardVectorTableSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlternateVectorTable feature is supported on the device
• false - The AlternateVectorTable feature is not supported on the device
Remarks
None.
5.6.11.6.5.2 PLIB_INT_ExistsCPUCurrentPriorityLevel Function
C
bool PLIB_INT_ExistsCPUCurrentPriorityLevel(
INT_MODULE_ID index
);
Description
This function identifies whether the CPUCurrentPriorityLevel feature is available on the Interrupt Controller module. When this
function returns true, this function is supported on the device:
• PLIB_INT_CPUCurrentPriorityLevelGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CPUCurrentPriorityLevel feature is supported on the device
• false - The CPUCurrentPriorityLevel feature is not supported on the device
Remarks
None.
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
5-2240
5.6.11.6.5.3 PLIB_INT_ExistsEnableControl Function
C
bool PLIB_INT_ExistsEnableControl(
INT_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the Interrupt Controller module. When this function
returns true, these functions are supported on the device:
• PLIB_INT_Enable
• PLIB_INT_Disable
• PLIB_INT_IsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EnableControl feature is supported on the device
• false - The EnableControl feature is not supported on the device
Remarks
None.
5.6.11.6.5.4 PLIB_INT_ExistsExternalINTEdgeSelect Function
C
bool PLIB_INT_ExistsExternalINTEdgeSelect(
INT_MODULE_ID index
);
Description
This function identifies whether the ExternalINTEdgeSelect feature is available on the Interrupt Controller module. When this
function returns true, these functions are supported on the device:
• PLIB_INT_ExternalRisingEdgeSelect
• PLIB_INT_ExternalFallingEdgeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the ExternalINTEdgeSelect feature:
• true - The ExternalINTEdgeSelect feature is supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
5-2241
• false - The ExternalINTEdgeSelect feature is not supported on the device
Remarks
None.
5.6.11.6.5.5 PLIB_INT_ExistsHighPriority Function
C
bool PLIB_INT_ExistsHighPriority(
INT_MODULE_ID index
);
Description
This function identifies whether the HighPriority feature is available on the Interrupt Controller module. When this function returns
true, these functions are supported on the device:
• PLIB_INT_PriorityHighEnable
• PLIB_INT_PriorityHighDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The HighPriority feature is supported on the device
• false - The HighPriority feature is not supported on the device
Remarks
None.
5.6.11.6.5.6 PLIB_INT_ExistsINTCPUPriority Function
C
bool PLIB_INT_ExistsINTCPUPriority(
INT_MODULE_ID index
);
Description
This function identifies whether the INTCPUPriority feature is available on the Interrupt Controller module. When this function
returns true, this function is supported on the device:
• PLIB_INT_PriorityGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The INTCPUPriority feature is supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
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• false - The INTCPUPriority feature is not supported on the device
Remarks
None.
5.6.11.6.5.7 PLIB_INT_ExistsINTCPUVector Function
C
bool PLIB_INT_ExistsINTCPUVector(
INT_MODULE_ID index
);
Description
This function identifies whether the INTCPUVector feature is available on the Interrupt Controller module. When this function
returns true, this function is supported on the device:
• PLIB_INT_VectorGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The INTCPUVector feature is supported on the device
• false - The INTCPUVector feature is not supported on the device
Remarks
None.
5.6.11.6.5.8 PLIB_INT_ExistsINTNesting Function
C
bool PLIB_INT_ExistsINTNesting(
INT_MODULE_ID index
);
Description
This function identifies whether the INTNesting feature is available on the Interrupt Controller module. When this function returns
true, these functions are supported on the device:
• PLIB_INT_NestingEnable
• PLIB_INT_NestingDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The INTNesting feature is supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help Interrupt Peripheral Library
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• false - The INTNesting feature is not supported on the device
Remarks
None.
5.6.11.6.5.9 PLIB_INT_ExistsLowPriority Function
C
bool PLIB_INT_ExistsLowPriority(
INT_MODULE_ID index
);
Description
This function identifies whether the LowPriority feature is available on the Interrupt Controller module. When this function returns
true, these functions are supported on the device:
• PLIB_INT_PriorityLowEnable
• PLIB_INT_PriorityLowDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LowPriority feature is supported on the device
• false - The LowPriority feature is not supported on the device
Remarks
None.
5.6.11.6.5.10 PLIB_INT_ExistsPeripheralControl Function
C
bool PLIB_INT_ExistsPeripheralControl(
INT_MODULE_ID index
);
Description
This function identifies whether the PeripheralControl feature is available on the Interrupt Controller module. When this function
returns true, these functions are supported on the device:
• PLIB_INT_PeripheralsEnable
• PLIB_INT_PeripheralsDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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5-2244
Returns
Existence of the PeripheralControl feature:
• true - The PeripheralControl feature is supported on the device
• false - The PeripheralControl feature is not supported on the device
Remarks
None.
5.6.11.6.5.11 PLIB_INT_ExistsPriority Function
C
bool PLIB_INT_ExistsPriority(
INT_MODULE_ID index
);
Description
This function identifies whether the Priority feature is available on the Interrupt Controller module. When this function returns
true, these functions are supported on the device:
• PLIB_INT_PriorityEnable
• PLIB_INT_PriorityDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Priority feature is supported on the device
• false - The Priority feature is not supported on the device
Remarks
None.
5.6.11.6.5.12 PLIB_INT_ExistsProximityTimerControl Function
C
bool PLIB_INT_ExistsProximityTimerControl(
INT_MODULE_ID index
);
Description
This function identifies whether the ProximityTimerControl feature is available on the Interrupt Controller module. When this
function returns true, these functions are supported on the device:
• PLIB_INT_ProximityTimerSet
• PLIB_INT_ProximityTimerGet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ProximityTimerControl feature is supported on the device
• false - The ProximityTimerControl feature is not supported on the device
Remarks
None.
5.6.11.6.5.13 PLIB_INT_ExistsProximityTimerEnable Function
C
bool PLIB_INT_ExistsProximityTimerEnable(
INT_MODULE_ID index
);
Description
This function identifies whether the ProximityTimerEnable feature is available on the Interrupt Controller module. When this
function returns true, these functions are supported on the device:
• PLIB_INT_ProximityTimerEnable
• PLIB_INT_ProximityTimerDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ProximityTimerEnable feature is supported on the device
• false - The ProximityTimerEnable feature is not supported on the device
Remarks
None.
5.6.11.6.5.14 PLIB_INT_ExistsSingleVectorShadowSet Function
C
bool PLIB_INT_ExistsSingleVectorShadowSet(
INT_MODULE_ID index
);
Description
This function identifies whether the SingleVectorShadowSet feature is available on the Interrupt Controller module. When this
function returns true, these functions are supported on the device:
• PLIB_INT_SingleVectorShadowSetDisable
• PLIB_INT_SingleVectorShadowSetEnable
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SingleVectorShadowSet feature is supported on the device
• false - The SingleVectorShadowSet feature is not supported on the device
Remarks
None.
5.6.11.6.5.15 PLIB_INT_ExistsSourceControl Function
C
bool PLIB_INT_ExistsSourceControl(
INT_MODULE_ID index
);
Description
This function identifies whether the SourceControl feature is available on the Interrupt Controller module. When this function
returns true, these functions are supported on the device:
• PLIB_INT_SourceEnable
• PLIB_INT_SourceDisable
• PLIB_INT_SourceIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SourceControl feature is supported on the device
• false - The SourceControl feature is not supported on the device
Remarks
None.
5.6.11.6.5.16 PLIB_INT_ExistsSourceFlag Function
C
bool PLIB_INT_ExistsSourceFlag(
INT_MODULE_ID index
);
Description
This function identifies whether the SourceFlag feature is available on the Interrupt Controller module. When this function returns
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true, these functions are supported on the device:
• PLIB_INT_SourceFlagGet
• PLIB_INT_SourceFlagSet
• PLIB_INT_SourceFlagClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SourceFlag feature is supported on the device
• false - The SourceFlag feature is not supported on the device
Remarks
None.
5.6.11.6.5.17 PLIB_INT_ExistsTrapSource Function
C
bool PLIB_INT_ExistsTrapSource(
INT_MODULE_ID index
);
Description
This function identifies whether the TrapSource feature is available on the Interrupt Controller module. When this function returns
true, these functions are supported on the device:
• PLIB_INT_TrapSourceFlagGet
• PLIB_INT_TrapSourceFlagClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TrapSource feature is supported on the device
• false - The TrapSource feature is not supported on the device
Remarks
None.
5.6.11.6.5.18 PLIB_INT_ExistsVectorPriority Function
C
bool PLIB_INT_ExistsVectorPriority(
INT_MODULE_ID index
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);
Description
This function identifies whether the VectorPriority feature is available on the Interrupt Controller module. When this function
returns true, these functions are supported on the device:
• PLIB_INT_VectorPrioritySet
• PLIB_INT_VectorPriorityGet
• PLIB_INT_VectorSubPrioritySet
• PLIB_INT_VectorSubPriorityGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The VectorPriority feature is supported on the device
• false - The VectorPriority feature is not supported on the device
Remarks
None.
5.6.11.6.5.19 PLIB_INT_ExistsVectorSelect Function
C
bool PLIB_INT_ExistsVectorSelect(
INT_MODULE_ID index
);
Description
This function identifies whether the VectorSelect feature is available on the Interrupt Controller module. When this function
returns true, these functions are supported on the device:
• PLIB_INT_MultiVectorSelect
• PLIB_INT_SingleVectorSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The VectorSelect feature is supported on the device
• false - The VectorSelect feature is not supported on the device
Remarks
None.
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5.6.11.7 Files
Files
Name Description
plib_int.h Defines the Interrupt Peripheral Library interface
Description
5.6.11.7.1 plib_int.h
Interrupt Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Interrupt Peripheral Library for Microchip microcontrollers. The definitions in this file are for the Interrupt Controller module.
Functions
Name Description
PLIB_INT_AlternateVectorTableSelect Enables the use of the alternate vector table.
PLIB_INT_CPUCurrentPriorityLevelGet Gets the interrupt priority level at which the CPU is currently operating.
PLIB_INT_Disable Disables the generation of interrupts to the CPU.
PLIB_INT_DISIStatusGet Returns the status of the DISI instruction status.
PLIB_INT_Enable Enables the generation of interrupts to the CPU.
PLIB_INT_ExistsAlternateVectorTable Identifies whether the AlternateVectorTable feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsCPUCurrentPriorityLevel Identifies whether the CPUCurrentPriorityLevel feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsEnableControl Identifies whether the EnableControl feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsExternalINTEdgeSelect Identifies whether the ExternalINTEdgeSelect feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsHighPriority Identifies whether the HighPriority feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsINTCPUPriority Identifies whether the INTCPUPriority feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsINTCPUVector Identifies whether the INTCPUVector feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsINTNesting Identifies whether the INTNesting feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsLowPriority Identifies whether the LowPriority feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsPeripheralControl Identifies whether the PeripheralControl feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsPriority Identifies whether the Priority feature exists on the Interrupt Controller
module.
PLIB_INT_ExistsProximityTimerControl Identifies whether the ProximityTimerControl feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsProximityTimerEnable Identifies whether the ProximityTimerEnable feature exists on the
Interrupt Controller module.
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PLIB_INT_ExistsSingleVectorShadowSet Identifies whether the SingleVectorShadowSet feature exists on the
Interrupt Controller module.
PLIB_INT_ExistsSourceControl Identifies whether the SourceControl feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsSourceFlag Identifies whether the SourceFlag feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsTrapSource Identifies whether the TrapSource feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsVectorPriority Identifies whether the VectorPriority feature exists on the Interrupt
Controller module.
PLIB_INT_ExistsVectorSelect Identifies whether the VectorSelect feature exists on the Interrupt
Controller module.
PLIB_INT_ExternalFallingEdgeSelect Selects the falling edge as the edge polarity of the external interrupt.
PLIB_INT_ExternalRisingEdgeSelect Selects the rising edge as the edge polarity of the external interrupt.
PLIB_INT_IsEnabled Identifies if interrupts are currently enabled or disabled at the top level.
PLIB_INT_MultiVectorSelect Configures the Interrupt Controller for Multiple Vector mode.
PLIB_INT_NestingDisable Disables interrupt nesting.
PLIB_INT_NestingEnable Enables interrupt nesting.
PLIB_INT_PeripheralsDisable Disables the generation of interrupts to the CPU by the peripherals.
PLIB_INT_PeripheralsEnable Enables the generation of interrupts to the CPU by the peripherals.
PLIB_INT_PriorityDisable Disables interrupt priority levels.
PLIB_INT_PriorityEnable Enables interrupt priority levels.
PLIB_INT_PriorityGet Returns the priority level of the latest interrupt presented to the CPU.
PLIB_INT_PriorityHighDisable Disables the generation of high-priority interrupts to the CPU.
PLIB_INT_PriorityHighEnable Enables the generation of high-priority interrupts to the CPU.
PLIB_INT_PriorityLowDisable Disables the generation of low-priority interrupts to the CPU.
PLIB_INT_PriorityLowEnable Enables generation of low-priority interrupts to the CPU.
PLIB_INT_ProximityTimerDisable Disables the interrupt temporal-proximity timer.
PLIB_INT_ProximityTimerEnable Enables the interrupt temporal-proximity timer and selects the priority
levels that start the timer.
PLIB_INT_ProximityTimerGet Returns the value used by the temporal proximity timer as a reload
value when the temporal proximity timer is triggered by an interrupt
event.
PLIB_INT_ProximityTimerSet Sets the temporal proximity timer reload value. This value is used to
reload the proximity timer after it has been triggered by an interrupt
event.
PLIB_INT_SingleVectorSelect Configures the Interrupt Controller for Single Vector mode.
PLIB_INT_SingleVectorShadowSetDisable Disables the Shadow Register Set in Single Vector mode.
PLIB_INT_SingleVectorShadowSetEnable Enables the Shadow Register Set in Single Vector mode.
PLIB_INT_SourceDisable Disables the interrupt source
PLIB_INT_SourceEnable Enables the interrupt source.
This section provides information on initialization and interrupt source
setup and handling.
PLIB_INT_SourceFlagClear Clears the status of the interrupt flag for the selected source.
PLIB_INT_SourceFlagGet Returns the status of the interrupt flag for the selected source.
PLIB_INT_SourceFlagSet Sets the status of the interrupt flag for the selected source.
PLIB_INT_SourceIsEnabled Gets the enable state of the interrupt source.
PLIB_INT_StandardVectorTableSelect Enables the use of the standard vector table.
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PLIB_INT_TrapSourceFlagClear Clears the flag for the selected trap.
PLIB_INT_TrapSourceFlagGet Returns the status of the flag for the selected trap.
PLIB_INT_VectorGet Returns the interrupt vector that is presented to the CPU.
PLIB_INT_VectorPriorityGet Gets the priority of the interrupt vector.
PLIB_INT_VectorPrioritySet Sets the priority of the interrupt vector.
PLIB_INT_VectorSubPriorityGet Gets the sub-priority of the interrupt vector.
PLIB_INT_VectorSubPrioritySet Sets the sub-priority of the interrupt vector.
File Name
plib_int.h
Company
Microchip Technology Inc.
5.6.12 NVM Peripheral Library
5.6.12.1 Introduction
NVM Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Non-Volatile Memory (NVM)component (Flash) on the Microchip family of
microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module without the
necessity of interacting directly with the module's registers, thus hiding differences from one microcontroller variant to another.
Description
Flash Program Memory
The Flash program memory is readable, writeable and erasable during normal operation over the entire operating voltage range.
A read from program memory is executed at one byte/word at a time depending on the width of the data bus.
A write to the program memory is executed in either blocks of specific sizes or a single word depending on the type of processor
used.
An erase is performed in blocks. A bulk erase may be performed from user code depending on the type of processor supporting
the operation.
Writing or erasing program memory will cease instruction fetches until the operation is complete thus restricting memory access
and therefore preventing code execution. This is controlled by an internal programming timer.
There are three processor dependant methods for program memory modification.
• Run-Time Self Programming (RTSP)
• In-Circuit Serial Programming (ICSP)
• EJTAG programming
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Note: This topic covers the RTSP techniques.
5.6.12.2 Release Notes
MPLAB Harmony Version: v0.70b NVM Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.12.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.12.4 Using the Library
This topic describes the basic architecture of the NVM Peripheral Library and provides information and examples on how to use
it.
Interface Header File: peripheral.h
The interface to the NVM library is defined in the "plib_nvm.h" header file, which is included by the "peripheral.h" peripheral
library header file. Any C language source (.c) file that uses the NVM library must include "peripheral.h".
Library File:
The NVM peripheral library is part of the processor-specific peripheral library archive (.a) file installed with the compiler. Libraries
in this archive are automatically available to the linker (in the default search path) for any project built using the Microchip
compiler.
5.6.12.4.1 Hardware Abstraction Model
This library provides a low-level abstraction of the NVM module on the Microchip family of microcontrollers with a convenient C
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language interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
Description
Abstraction Model
The NVM Peripheral Library provides interface routines to interact with the blocks shown in the diagram.
NVM Software Abstraction Block Diagram
The Flash Status and Control logic ensures that the Flash memory is configured appropriately for modification. It also provides
the status of the different operations in progress as well as errors, if any. It also decides if the operation is for Flash program
memory or the special device Configuration registers.
The Flash Read/Write block ensures that the user data is written to/read from the program memory holding latches. It provides
a layer of abstraction over the sequence of processor specific instructions which are required to access this data. Depending on
the processor type, either block or Word programming options are available.
5.6.12.4.2 Library Usage Model
The topic describes the major components of the usage model.
Description
Each of the blocks in the diagram correspond to the library interface section.
Usage Model
Library Interface Section Description
Flash Configuration Provides setup, configuration and status control interface routines for Flash program memory.
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Flash Read/Write Provides bytewise, pagewise and blockwise Memory access along with NVM keysequence
interface routines.
5.6.12.4.3 How the Library Works
The usage model for this library is explained in the following sections.
5.6.12.4.3.1 State Machine
The following state machine is for the NVM Read and Write during the normal operation. This state machine is provided to give a
general idea of the usage model of the peripheral library. Refer to the usage model for more detailed steps for the scenario that
is being used.
NVM Write and Read State Machine
State Associated Function
Setup and
Initialization
Refer to mode of NVM for detailed instructions of setup.
Select Type of
memory
Once the NVM has been appropriately set up and initialized, the state machine waits for the application to
select the type of memory to be accessed Flash program memory or configuration registers.
Configure and
enable write/read
Configures the registers and enables the write/read operation.
Select Address The application provides the write/read address from which to access memory.
Send Data/Read
Data
When the application is polling it can fill data/ read data into the internal holding registers and initiate write
via PLIB_NVM_FlashWriteStart(NVM_ID_0).
Read Error/Write
Status
The error/write status is available to the application via
PLIB_NVM_FlashWriteCycleHasCompleted(NVM_ID_0) and other status APIs.
Note: Refer to the mode used for the NVM for the setup and initialization steps.
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5.6.12.4.3.2 Flash Operations
Note: Flash program memory operations vary across microcontrollers. Please refer to the specific device data sheet or related
family reference manual section to determine which features are supported by the device in use.
Flash Read Operation
Setup
1. Provide the Flash program memory from which the data memory has to be read via the API PLIB_NVM_FlashRead(). This
address is then updated in the respective address registers or the Table Pointers depending on the device.
2. Ensure the alignment of the address as specified by the specific device data sheet.
3. The size of the data read depends upon the microcontroller in use. For specific details please refer to the Family Reference
manual.
Example : Program Memory Read
// Determine the address from which to read
#define MY_FLASH_BASE_ADDRESS 0xA0007862 //Or any address in flash to read
uint32_t address = MY_FLASH_BASE_ADDRESS;
// The Data Available at the memory location
size_t DataToBeRead;
// where, MY_NVM_INSTANCE - is a specific instance of the hardware peripheral.
// where, address - The address in the memory from which to read.
DataToBeRead = PLIB_NVM_FlashRead(NVM_ID_0, address);
5.6.12.4.3.3 Miscellaneous Functions
Note: Flash program memory operations vary across microcontrollers. Please refer to the specific device data sheet or related
family reference manual to determine which features are supported by the device in use.
This section will detail out a few niche and processor specific APIs provided by this library.
Stop in Idle Mode
The PLIB_NVM_StopInIdleEnable and PLIB_NVM_StopInIdleDisablex functions cater to this functionality.These functions
ensure that Flash operations are discontinued in Idle mode.
Low Voltage Detection
The PLIB_NVM_LowVoltageIsDetected and PLIB_NVM_LowVoltageEventIsActive functions support low-voltage error detection
and triggering of a low-voltage event.
5.6.12.4.4 Configuring the Library
The library is configured for the supported processor when the processor is chosen in the MPLAB IDE.
5.6.12.4.5 Building the Library
This section list the files that are available in the \src of the NVM driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
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5.6.12.5 Library Interface
Configuration and Status Functions
Name Description
PLIB_NVM_LowVoltageEventIsActive Provides low voltage detection status
PLIB_NVM_LowVoltageIsDetected Provides low voltage error detection status
PLIB_NVM_MemoryModifyEnable Allows write cycles to Flash/EEPROM
PLIB_NVM_MemoryModifyInhibit Inhibits write cycles to Flash/EEPROM
PLIB_NVM_MemoryOperationSelect Selects the operation to be performed on Flash/EEPROM memory.
PLIB_NVM_StopInIdleDisable Continues Flash operation when device enters idle mode.
PLIB_NVM_StopInIdleEnable Discontinues Flash operation when device enters idle mode.
PLIB_NVM_WriteOperationHasTerminated This routine provides the status of the Flash/EEPROM write operation
or sequence.
Feature Existence Functions
Name Description
PLIB_NVM_ExistsAccessEnable Identifies whether the AccessEnableControl feature exists on
the NVM module
PLIB_NVM_ExistsAddressModifyControl Identifies whether the AddressModifyControl feature exists on
the NVM module
PLIB_NVM_ExistsBootPageWriteProtect Identifies whether the BootPageWriteProtect feature exists on
the NVM module
PLIB_NVM_ExistsEEPROMReadInitiate Identifies whether the EEPROMReadInitiate feature exists on
the NVM module
PLIB_NVM_ExistsFlashBankRegionSelect Identifies whether the FlashBankRegionSelect feature exists on
the NVM module
PLIB_NVM_ExistsFlashWPMemoryRangeProvide Identifies whether the FlashWPMemoryRangeProvide feature
exists on the NVM module
PLIB_NVM_ExistsKeySequence Identifies whether the KeySequence feature exists on the NVM
module
PLIB_NVM_ExistsLockBootSelect Identifies whether the LockBootSelect feature exists on the
NVM module
PLIB_NVM_ExistsLockPFMSelect Identifies whether the LockPFMSelect feature exists on the
NVM module
PLIB_NVM_ExistsLowVoltageError Identifies whether the LowVoltageError feature exists on the
NVM module
PLIB_NVM_ExistsLowVoltageStatus Identifies whether the LowVoltageStatus feature exists on the
NVM module
PLIB_NVM_ExistsMemoryModificationControl Identifies whether the MemoryModificationControl feature exists
on the NVM module
PLIB_NVM_ExistsOperationMode Identifies whether the OperationMode feature exists on the
NVM module
PLIB_NVM_ExistsProgramEraseOperation Identifies whether the ProgramEraseOperation feature exists on
the NVM module
PLIB_NVM_ExistsProvideData Identifies whether the ProvideData feature exists on the NVM
module
PLIB_NVM_ExistsProvideQuadData Identifies whether the ProvideQuadData feature exists on the
NVM module
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PLIB_NVM_ExistsSourceAddress Identifies whether the SourceAddress feature exists on the
NVM module
PLIB_NVM_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the NVM
module
PLIB_NVM_ExistsWriteErrorStatus Identifies whether the WriteErrorStatus feature exists on the
NVM module
PLIB_NVM_ExistsWriteOperation Identifies whether the WriteOperation feature exists on the
NVM module
Flash Memory Functions
Name Description
PLIB_NVM_DataBlockSourceAddress Takes the address parameter in the argument and loads the
base address from which data has to be copied into flash.
PLIB_NVM_FlashAccessEnable Allows access to the Flash program memory
PLIB_NVM_FlashAddressToModify Takes the address parameter in the argument and loads the
address which will be modified by the actual write operation to
the appropriate pointer registers .
PLIB_NVM_FlashEraseOperationSelect For ERASE and FREE
PLIB_NVM_FlashEraseStart Initiates a Program memory erase/write cycle
PLIB_NVM_FlashProvideData Provides the user data to intermediate registers before written
into flash
PLIB_NVM_FlashProvideQuadData Provides low voltage detection status
PLIB_NVM_FlashRead Takes the address parameter in the argument and loads the
read address to the appropriate register and returns the value
read.
PLIB_NVM_FlashWriteCycleHasCompleted This routine provides the status of the Flash/EEPROM write
cycle.
PLIB_NVM_FlashWriteKeySequence Copies the mandatory KEY sequence into the respective
registers.
PLIB_NVM_FlashWriteOperationSelect Performs erase operation on the memory row selected
PLIB_NVM_FlashWriteProtectMemoryAreaRange Provides low voltage detection status
PLIB_NVM_FlashWriteStart Initiates a Program memory erase/write cycle
PLIB_NVM_IsProgramFlashMemoryLocked Provides low voltage detection status
PLIB_NVM_ProgramFlashBank1LowerRegion Provides low voltage detection status
PLIB_NVM_ProgramFlashBank2LowerRegion Provides low voltage detection status
Other Functions
Name Description
PLIB_NVM_BootPageWriteProtectionDisable Provides low voltage detection status
PLIB_NVM_BootPageWriteProtectionEnable Provides low voltage detection status
PLIB_NVM_IsBootMemoryLocked Provides low voltage detection status
PLIB_NVM_IsBootPageWriteProtected Provides low voltage detection status
PLIB_NVM_LockBootMemory Provides low voltage detection status
PLIB_NVM_LockProgramFlashMemory Provides low voltage detection status
Description
This section describes the Application Programming Interface (API) functions of the NVM Peripheral Library.
Refer to each section for detailed descriptions.
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5.6.12.5.1 Configuration and Status Functions
5.6.12.5.1.1 PLIB_NVM_LowVoltageEventIsActive Function
C
bool PLIB_NVM_LowVoltageEventIsActive(
NVM_MODULE_ID index
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.1.2 PLIB_NVM_LowVoltageIsDetected Function
C
bool PLIB_NVM_LowVoltageIsDetected(
NVM_MODULE_ID index
);
Description
This routine provides detection of low voltage error status
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage detection and possible data corruption 0 - Voltage Level Acceptable for programming.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
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Example
bool status;
status = PLIB_NVM_LowVoltageIsDetected(MY_NVM_INSTANCE);
5.6.12.5.1.3 PLIB_NVM_MemoryModifyEnable Function
C
void PLIB_NVM_MemoryModifyEnable(
NVM_MODULE_ID index
);
Description
This routine allows write cycles to Flash/EEPROM
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsMemoryModificationControl in your application to determine whether this feature is available.
Example
PLIB_NVM_MemoryModifyEnable(MY_NVM_INSTANCE);
5.6.12.5.1.4 PLIB_NVM_MemoryModifyInhibit Function
C
void PLIB_NVM_MemoryModifyInhibit(
NVM_MODULE_ID index
);
Description
This routine Inhibits write cycles to Flash/EEPROM
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsMemoryModificationControl in your application to determine whether this feature is available.
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Example
PLIB_NVM_MemoryModifyInhibit(MY_NVM_INSTANCE);
5.6.12.5.1.5 PLIB_NVM_MemoryOperationSelect Function
C
void PLIB_NVM_MemoryOperationSelect(
NVM_MODULE_ID index,
NVM_OPERATION_MODE operationmode
);
Description
This routine selects the operation to be performed on Flash/EEPROM memory.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsOperationMode in your application to determine whether this feature is available.
Example
PLIB_NVM_MemoryOperationSelect(MY_NVM_INSTANCE, NVM_MEMORY_ROW_PROGRAM_OPERATION);
5.6.12.5.1.6 PLIB_NVM_StopInIdleDisable Function
C
void PLIB_NVM_StopInIdleDisable(
NVM_MODULE_ID index
);
Description
This routine continues Flash operation when device enters idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsStopInIdle in your application to determine whether this feature is available.
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Example
PLIB_NVM_StopInIdleDisable(MY_NVM_INSTANCE, DataToWrite);
5.6.12.5.1.7 PLIB_NVM_StopInIdleEnable Function
C
void PLIB_NVM_StopInIdleEnable(
NVM_MODULE_ID index
);
Description
This routine discontinues Flash operation when device enters idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsStopInIdle in your application to determine whether this feature is available.
Example
PLIB_NVM_StopInIdleEnable(MY_NVM_INSTANCE, DataToWrite);
5.6.12.5.1.8 PLIB_NVM_WriteOperationHasTerminated Function
C
bool PLIB_NVM_WriteOperationHasTerminated(
NVM_MODULE_ID index
);
Description
This routine provides the status of the Flash/EEPROM write operation or sequence which was initiated by a write/erase
operation.
Preconditions
The Address row to be erased must be provided earlier using PLIB_NVM_FlashAddressToModify(). The module should be
configured to access Flash memory using PLIB_NVM_FlashMemoryAccessEnable(). A Write cycle must have been initiated via
PLIB_NVM_EEPROMWriteInitiate().
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Write operation prematurely terminated. 0 - Write operation completed.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsWriteErrorStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_WriteOperationHasTerminated(MY_NVM_INSTANCE);
5.6.12.5.2 Flash Memory Functions
5.6.12.5.2.1 PLIB_NVM_DataBlockSourceAddress Function
C
void PLIB_NVM_DataBlockSourceAddress(
NVM_MODULE_ID index,
uint32_t address
);
Description
This routine takes the address parameter in the argument and loads the base address from which data has to be copied into
flash. This is to copy a row of data directly into flash in one iteration without handling any intermediate holding registers.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
address The starting address in the user date memory from which data will be written
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsSourceAddress in your application to determine whether this feature is available.
Example
uint32_t address = MY_RAM_BASE_ADDRESS;
PLIB_NVM_DataBlockSourceAddress(MY_NVM_INSTANCE, address);
5.6.12.5.2.2 PLIB_NVM_FlashAccessEnable Function
C
void PLIB_NVM_FlashAccessEnable(
NVM_MODULE_ID index
);
Description
This routine allows access to the Flash program memory
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsAccessEnable in your application to determine whether this feature is available.
Example
PLIB_NVM_FlashAccessEnable(MY_NVM_INSTANCE);
5.6.12.5.2.3 PLIB_NVM_FlashAddressToModify Function
C
void PLIB_NVM_FlashAddressToModify(
NVM_MODULE_ID index,
uint32_t address
);
Description
This routine takes the address parameter in the argument and loads the address which will be modified by the actual write
operation. The write operation following this will write the user data into the program memory.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
address The starting address in the memory from which data will be written
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsAddressModifyControl in your application to determine whether this feature is available.
Example
uint32_t address = MY_FLASH_BASE_ADDRESS;
PLIB_NVM_FlashAddressToModify(MY_NVM_INSTANCE, address);
5.6.12.5.2.4 PLIB_NVM_FlashEraseOperationSelect Function
C
void PLIB_NVM_FlashEraseOperationSelect(
NVM_MODULE_ID index
);
Description
For ERASE and FREE
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5.6.12.5.2.5 PLIB_NVM_FlashEraseStart Function
C
void PLIB_NVM_FlashEraseStart(
NVM_MODULE_ID index
);
Description
This routine initiates the program memory erase or write cycles
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsWriteOperation in your application to determine whether this feature is available.
Example
PLIB_NVM_FlashEraseStart(MY_NVM_INSTANCE, DataToWrite);
5.6.12.5.2.6 PLIB_NVM_FlashProvideData Function
C
void PLIB_NVM_FlashProvideData(
NVM_MODULE_ID index,
uint32_t data
);
Description
This routine provides the user data to intermediate registers before written into flash.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
data Data to be written.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsProvideData in your application to determine whether this feature is available.
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Example
uint32_t DataToWrite;
PLIB_NVM_FlashProvideData(MY_NVM_INSTANCE, DataToWrite);
5.6.12.5.2.7 PLIB_NVM_FlashProvideQuadData Function
C
void PLIB_NVM_FlashProvideQuadData(
NVM_MODULE_ID index,
uint32_t * data
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.2.8 PLIB_NVM_FlashRead Function
C
uint32_t PLIB_NVM_FlashRead(
NVM_MODULE_ID index,
uint32_t address
);
Description
This routine takes the address parameter in the argument and loads the read address to the appropriate register. The read
operation provides data from the above address.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
address The address in the memory from which to read
Returns
Data value read at the memory address.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsWriteOperation in your application to determine whether this feature is available.
Example
uint32_t DataToBeRead;
DataToBeRead = PLIB_NVM_FlashRead(MY_NVM_INSTANCE);
5.6.12.5.2.9 PLIB_NVM_FlashWriteCycleHasCompleted Function
C
bool PLIB_NVM_FlashWriteCycleHasCompleted(
NVM_MODULE_ID index
);
Description
This routine provides the status of the Flash/EEPROM write cycle which was initiated by a write/erase operation.
Preconditions
The Address row to be erased must be provided earlier using PLIB_NVM_FlashAddressToModify(). The module should be
configured to access Flash memory using PLIB_NVM_FlashMemoryAccessEnable(). A Write cycle must have been initiated via
PLIB_NVM_EEPROMWriteInitiate().
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Write/Erase Cycle is incomplete. 0 - Write cycle completed
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsWriteOperation in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_FlashWriteCycleHasCompleted(MY_NVM_INSTANCE);
5.6.12.5.2.10 PLIB_NVM_FlashWriteKeySequence Function
C
void PLIB_NVM_FlashWriteKeySequence(
NVM_MODULE_ID index,
uint32_t keysequence
);
Description
This routine copies the mandatory KEY sequence into the respective registers.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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keysequence Mandatory KEY sequence depending on the controller type
Returns
None.
Remarks
Without the KEY sequence write/erase operation will not be executed.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsKeySequence in your application to determine whether this feature is available.
Example
PLIB_NVM_FlashWriteKeySequence(MY_NVM_INSTANCE, keysequence);
5.6.12.5.2.11 PLIB_NVM_FlashWriteOperationSelect Function
C
void PLIB_NVM_FlashWriteOperationSelect(
NVM_MODULE_ID index
);
Description
This routine Performs erase operation on the flash memory row selected
Preconditions
The Address row to be erased must be provided earlier using PLIB_NVM_FlashAddressToModify(). The module should be
configured to access Flash memory using PLIB_NVM_FlashMemoryAccessEnable().
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsProgramEraseOperation in your application to determine whether this feature is available.
Example
PLIB_NVM_FlashWriteOperationSelect(MY_NVM_INSTANCE);
5.6.12.5.2.12 PLIB_NVM_FlashWriteProtectMemoryAreaRange Function
C
void PLIB_NVM_FlashWriteProtectMemoryAreaRange(
NVM_MODULE_ID index,
uint32_t address
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.2.13 PLIB_NVM_FlashWriteStart Function
C
void PLIB_NVM_FlashWriteStart(
NVM_MODULE_ID index
);
Description
This routine initiates the program memory erase or write cycles
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsWriteOperation in your application to determine whether this feature is available.
Example
PLIB_NVM_FlashWriteStart(MY_NVM_INSTANCE);
5.6.12.5.2.14 PLIB_NVM_IsProgramFlashMemoryLocked Function
C
bool PLIB_NVM_IsProgramFlashMemoryLocked(
NVM_MODULE_ID index
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.2.15 PLIB_NVM_ProgramFlashBank1LowerRegion Function
C
void PLIB_NVM_ProgramFlashBank1LowerRegion(
NVM_MODULE_ID index
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.2.16 PLIB_NVM_ProgramFlashBank2LowerRegion Function
C
void PLIB_NVM_ProgramFlashBank2LowerRegion(
NVM_MODULE_ID index
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.3 Other Functions
5.6.12.5.3.1 PLIB_NVM_BootPageWriteProtectionDisable Function
C
void PLIB_NVM_BootPageWriteProtectionDisable(
NVM_MODULE_ID index,
NVM_BOOT_MEMORY_PAGE bootPage
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.3.2 PLIB_NVM_BootPageWriteProtectionEnable Function
C
void PLIB_NVM_BootPageWriteProtectionEnable(
NVM_MODULE_ID index,
NVM_BOOT_MEMORY_PAGE bootPage
);
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Description
This routine provides detection of low voltage event if any.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.3.3 PLIB_NVM_IsBootMemoryLocked Function
C
bool PLIB_NVM_IsBootMemoryLocked(
NVM_MODULE_ID index,
NVM_BOOT_MEMORY_AREA memoryArea
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.3.4 PLIB_NVM_IsBootPageWriteProtected Function
C
bool PLIB_NVM_IsBootPageWriteProtected(
NVM_MODULE_ID index,
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NVM_BOOT_MEMORY_PAGE bootPage
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.3.5 PLIB_NVM_LockBootMemory Function
C
void PLIB_NVM_LockBootMemory(
NVM_MODULE_ID index,
NVM_BOOT_MEMORY_AREA memoryArea
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
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5.6.12.5.3.6 PLIB_NVM_LockProgramFlashMemory Function
C
void PLIB_NVM_LockProgramFlashMemory(
NVM_MODULE_ID index
);
Description
This routine provides detection of low voltage event if any.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Low Voltage Event active. 0 - Low Voltage Event not Active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_NVM_ExistsLowVoltageStatus in your application to determine whether this feature is available.
Example
bool status;
status = PLIB_NVM_LowVoltageEventIsActive(MY_NVM_INSTANCE);
5.6.12.5.4 Feature Existence Functions
5.6.12.5.4.1 PLIB_NVM_ExistsAccessEnable Function
C
bool PLIB_NVM_ExistsAccessEnable(
NVM_MODULE_ID index
);
Description
This function identifies whether the AccessEnableControl feature is available on the NVM module. When this function returns
true, these functions are supported on the device:
• PLIB_NVM_FlashAccessEnable
• PLIB_NVM_EEPROMAccessEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AccessEnableControl feature is supported on the device
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• false - The AccessEnableControl feature is not supported on the device
Remarks
None.
5.6.12.5.4.2 PLIB_NVM_ExistsAddressModifyControl Function
C
bool PLIB_NVM_ExistsAddressModifyControl(
NVM_MODULE_ID index
);
Description
This function identifies whether the AddressModifyControl feature is available on the NVM module. When this function returns
true, these functions are supported on the device:
• PLIB_NVM_FlashAddressToModify
• PLIB_NVM_EEPROMAddressToModify
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AddressModifyControl feature is supported on the device
• false - The AddressModifyControl feature is not supported on the device
Remarks
None.
5.6.12.5.4.3 PLIB_NVM_ExistsBootPageWriteProtect Function
C
bool PLIB_NVM_ExistsBootPageWriteProtect(
NVM_MODULE_ID index
);
Description
This function identifies whether the BootPageWriteProtect feature is available on the NVM module. When this function returns
true, these functions are supported on the device:
• PLIB_NVM_BootPageWriteProtectionEnable
• PLIB_NVM_BootPageWriteProtectionDisable
• PLIB_NVM_IsBootPageWriteProtected
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The BootPageWriteProtect feature is supported on the device
• false - The BootPageWriteProtect feature is not supported on the device
Remarks
None.
5.6.12.5.4.4 PLIB_NVM_ExistsEEPROMReadInitiate Function
C
bool PLIB_NVM_ExistsEEPROMReadInitiate(
NVM_MODULE_ID index
);
Description
This function identifies whether the EEPROMReadInitiate feature is available on the NVM module. When this function returns
true, these functions are supported on the device:
• PLIB_NVM_EEPROMReadStart
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EEPROMReadInitiate feature is supported on the device
• false - The EEPROMReadInitiate feature is not supported on the device
Remarks
None.
5.6.12.5.4.5 PLIB_NVM_ExistsFlashBankRegionSelect Function
C
bool PLIB_NVM_ExistsFlashBankRegionSelect(
NVM_MODULE_ID index
);
Description
This function identifies whether the FlashBankRegionSelect feature is available on the NVM module. When this function returns
true, these functions are supported on the device:
• PLIB_NVM_ProgramFlashBank1LowerRegion
• PLIB_NVM_ProgramFlashBank2LowerRegion
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FlashBankRegionSelect feature is supported on the device
• false - The FlashBankRegionSelect feature is not supported on the device
Remarks
None.
5.6.12.5.4.6 PLIB_NVM_ExistsFlashWPMemoryRangeProvide Function
C
bool PLIB_NVM_ExistsFlashWPMemoryRangeProvide(
NVM_MODULE_ID index
);
Description
This function identifies whether the FlashWPMemoryRangeProvide feature is available on the NVM module. When this function
returns true, these functions are supported on the device:
• PLIB_NVM_FlashWriteProtectMemoryAreaRange
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FlashWPMemoryRangeProvide feature is supported on the device
• false - The FlashWPMemoryRangeProvide feature is not supported on the device
Remarks
None.
5.6.12.5.4.7 PLIB_NVM_ExistsKeySequence Function
C
bool PLIB_NVM_ExistsKeySequence(
NVM_MODULE_ID index
);
Description
This function identifies whether the KeySequence feature is available on the NVM module. When this function returns true, these
functions are supported on the device:
• PLIB_NVM_FlashWriteKeySequence
• PLIB_NVM_EEPROMWriteKeySequence
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The KeySequence feature is supported on the device
• false - The KeySequence feature is not supported on the device
Remarks
None.
5.6.12.5.4.8 PLIB_NVM_ExistsLockBootSelect Function
C
bool PLIB_NVM_ExistsLockBootSelect(
NVM_MODULE_ID index
);
Description
This function identifies whether the LockBootSelect feature is available on the NVM module. When this function returns true,
these functions are supported on the device:
• PLIB_NVM_LockBootMemory
• PLIB_NVM_IsBootMemoryLocked
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LockBootSelect feature is supported on the device
• false - The LockBootSelect feature is not supported on the device
Remarks
None.
5.6.12.5.4.9 PLIB_NVM_ExistsLockPFMSelect Function
C
bool PLIB_NVM_ExistsLockPFMSelect(
NVM_MODULE_ID index
);
Description
This function identifies whether the LockPFMSelect feature is available on the NVM module. When this function returns true,
these functions are supported on the device:
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• PLIB_NVM_LockProgramFlashMemory
• PLIB_NVM_IsProgramFlashMemoryLocked
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LockPFMSelect feature is supported on the device
• false - The LockPFMSelect feature is not supported on the device
Remarks
None.
5.6.12.5.4.10 PLIB_NVM_ExistsLowVoltageError Function
C
bool PLIB_NVM_ExistsLowVoltageError(
NVM_MODULE_ID index
);
Description
This function identifies whether the LowVoltageStatus feature is available on the NVM module. When this function returns true,
these functions are supported on the device:
• PLIB_NVM_LowVoltageIsDetected
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LowVoltageStatus feature is supported on the device
• false - The LowVoltageStatus feature is not supported on the device
Remarks
None.
5.6.12.5.4.11 PLIB_NVM_ExistsLowVoltageStatus Function
C
bool PLIB_NVM_ExistsLowVoltageStatus(
NVM_MODULE_ID index
);
Description
This function identifies whether the LowVoltageStatus feature is available on the NVM module. When this function returns true,
these functions are supported on the device:
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• PLIB_NVM_LowVoltageEventIsActive
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LowVoltageStatus feature is supported on the device
• false - The LowVoltageStatus feature is not supported on the device
Remarks
None.
5.6.12.5.4.12 PLIB_NVM_ExistsMemoryModificationControl Function
C
bool PLIB_NVM_ExistsMemoryModificationControl(
NVM_MODULE_ID index
);
Description
This function identifies whether the MemoryModificationControl feature is available on the NVM module. When this function
returns true, these functions are supported on the device:
• PLIB_NVM_MemoryModifyEnable
• PLIB_NVM_MemoryModifyInhibit
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MemoryModificationControl feature is supported on the device
• false - The MemoryModificationControl feature is not supported on the device
Remarks
None.
5.6.12.5.4.13 PLIB_NVM_ExistsOperationMode Function
C
bool PLIB_NVM_ExistsOperationMode(
NVM_MODULE_ID index
);
Description
This function identifies whether the OperationMode feature is available on the NVM module. When this function returns true,
these functions are supported on the device:
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• PLIB_NVM_MemoryOperationSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OperationMode feature is supported on the device
• false - The OperationMode feature is not supported on the device
Remarks
None.
5.6.12.5.4.14 PLIB_NVM_ExistsProgramEraseOperation Function
C
bool PLIB_NVM_ExistsProgramEraseOperation(
NVM_MODULE_ID index
);
Description
This function identifies whether the ProgramEraseOperation feature is available on the NVM module. When this function returns
true, these functions are supported on the device:
• PLIB_NVM_FlashEraseOperationSelect
• PLIB_NVM_FlashWriteOperationSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ProgramEraseOperation feature is supported on the device
• false - The ProgramEraseOperation feature is not supported on the device
Remarks
None.
5.6.12.5.4.15 PLIB_NVM_ExistsProvideData Function
C
bool PLIB_NVM_ExistsProvideData(
NVM_MODULE_ID index
);
Description
This function identifies whether the ProvideData feature is available on the NVM module. When this function returns true, these
functions are supported on the device:
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• PLIB_NVM_FlashProvideData
• PLIB_NVM_EEPROMProvideData
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ProvideData feature is supported on the device
• false - The ProvideData feature is not supported on the device
Remarks
None.
5.6.12.5.4.16 PLIB_NVM_ExistsProvideQuadData Function
C
bool PLIB_NVM_ExistsProvideQuadData(
NVM_MODULE_ID index
);
Description
This function identifies whether the ProvideQuadData feature is available on the NVM module. When this function returns true,
these functions are supported on the device:
• PLIB_NVM_FlashProvideQuadData
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ProvideQuadData feature is supported on the device
• false - The ProvideQuadData feature is not supported on the device
Remarks
None.
5.6.12.5.4.17 PLIB_NVM_ExistsSourceAddress Function
C
bool PLIB_NVM_ExistsSourceAddress(
NVM_MODULE_ID index
);
Description
This function identifies whether the SourceAddress feature is available on the NVM module. When this function returns true,
these functions are supported on the device:
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• PLIB_NVM_DataBlockSourceAddress
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SourceAddress feature is supported on the device
• false - The SourceAddress feature is not supported on the device
Remarks
None.
5.6.12.5.4.18 PLIB_NVM_ExistsStopInIdle Function
C
bool PLIB_NVM_ExistsStopInIdle(
NVM_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the NVM module. When this function returns true, these
functions are supported on the device:
• PLIB_NVM_StopInIdleEnable
• PLIB_NVM_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StopInIdle feature is supported on the device
• false - The StopInIdle feature is not supported on the device
Remarks
None.
5.6.12.5.4.19 PLIB_NVM_ExistsWriteErrorStatus Function
C
bool PLIB_NVM_ExistsWriteErrorStatus(
NVM_MODULE_ID index
);
Description
This function identifies whether the WriteErrorStatus feature is available on the NVM module. When this function returns true,
these functions are supported on the device:
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• PLIB_NVM_WriteOperationHasTerminated
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WriteErrorStatus feature is supported on the device
• false - The WriteErrorStatus feature is not supported on the device
Remarks
None.
5.6.12.5.4.20 PLIB_NVM_ExistsWriteOperation Function
C
bool PLIB_NVM_ExistsWriteOperation(
NVM_MODULE_ID index
);
Description
This function identifies whether the WriteOperation feature is available on the NVM module. When this function returns true,
these functions are supported on the device:
• PLIB_NVM_FlashRead
• PLIB_NVM_EEPROMRead
• PLIB_NVM_FlashWriteStart
• PLIB_NVM_FlashEraseStart
• PLIB_NVM_EEPROMWriteStart
• PLIB_NVM_EEPROMEraseStart
• PLIB_NVM_FlashWriteCycleHasCompleted
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WriteOperation feature is supported on the device
• false - The WriteOperation feature is not supported on the device
Remarks
None.
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5.6.12.6 Files
Files
Name Description
plib_nvm.h NVM PLIB Interface Header for NVM common definitions
Description
5.6.12.6.1 plib_nvm.h
NVM Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
NVM PLIB for all families of Microchip microcontrollers..The definitions in this file are common to NVM peripheral.
Functions
Name Description
PLIB_NVM_BootPageWriteProtectionDisable Provides low voltage detection status
PLIB_NVM_BootPageWriteProtectionEnable Provides low voltage detection status
PLIB_NVM_DataBlockSourceAddress Takes the address parameter in the argument and loads the
base address from which data has to be copied into flash.
PLIB_NVM_ExistsAccessEnable Identifies whether the AccessEnableControl feature exists on
the NVM module
PLIB_NVM_ExistsAddressModifyControl Identifies whether the AddressModifyControl feature exists on
the NVM module
PLIB_NVM_ExistsBootPageWriteProtect Identifies whether the BootPageWriteProtect feature exists on
the NVM module
PLIB_NVM_ExistsEEPROMReadInitiate Identifies whether the EEPROMReadInitiate feature exists on
the NVM module
PLIB_NVM_ExistsFlashBankRegionSelect Identifies whether the FlashBankRegionSelect feature exists on
the NVM module
PLIB_NVM_ExistsFlashWPMemoryRangeProvide Identifies whether the FlashWPMemoryRangeProvide feature
exists on the NVM module
PLIB_NVM_ExistsKeySequence Identifies whether the KeySequence feature exists on the NVM
module
PLIB_NVM_ExistsLockBootSelect Identifies whether the LockBootSelect feature exists on the
NVM module
PLIB_NVM_ExistsLockPFMSelect Identifies whether the LockPFMSelect feature exists on the
NVM module
PLIB_NVM_ExistsLowVoltageError Identifies whether the LowVoltageError feature exists on the
NVM module
PLIB_NVM_ExistsLowVoltageStatus Identifies whether the LowVoltageStatus feature exists on the
NVM module
PLIB_NVM_ExistsMemoryModificationControl Identifies whether the MemoryModificationControl feature exists
on the NVM module
PLIB_NVM_ExistsOperationMode Identifies whether the OperationMode feature exists on the
NVM module
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PLIB_NVM_ExistsProgramEraseOperation Identifies whether the ProgramEraseOperation feature exists on
the NVM module
PLIB_NVM_ExistsProvideData Identifies whether the ProvideData feature exists on the NVM
module
PLIB_NVM_ExistsProvideQuadData Identifies whether the ProvideQuadData feature exists on the
NVM module
PLIB_NVM_ExistsSourceAddress Identifies whether the SourceAddress feature exists on the
NVM module
PLIB_NVM_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the NVM
module
PLIB_NVM_ExistsWriteErrorStatus Identifies whether the WriteErrorStatus feature exists on the
NVM module
PLIB_NVM_ExistsWriteOperation Identifies whether the WriteOperation feature exists on the
NVM module
PLIB_NVM_FlashAccessEnable Allows access to the Flash program memory
PLIB_NVM_FlashAddressToModify Takes the address parameter in the argument and loads the
address which will be modified by the actual write operation to
the appropriate pointer registers .
PLIB_NVM_FlashEraseOperationSelect For ERASE and FREE
PLIB_NVM_FlashEraseStart Initiates a Program memory erase/write cycle
PLIB_NVM_FlashProvideData Provides the user data to intermediate registers before written
into flash
PLIB_NVM_FlashProvideQuadData Provides low voltage detection status
PLIB_NVM_FlashRead Takes the address parameter in the argument and loads the
read address to the appropriate register and returns the value
read.
PLIB_NVM_FlashWriteCycleHasCompleted This routine provides the status of the Flash/EEPROM write
cycle.
PLIB_NVM_FlashWriteKeySequence Copies the mandatory KEY sequence into the respective
registers.
PLIB_NVM_FlashWriteOperationSelect Performs erase operation on the memory row selected
PLIB_NVM_FlashWriteProtectMemoryAreaRange Provides low voltage detection status
PLIB_NVM_FlashWriteStart Initiates a Program memory erase/write cycle
PLIB_NVM_IsBootMemoryLocked Provides low voltage detection status
PLIB_NVM_IsBootPageWriteProtected Provides low voltage detection status
PLIB_NVM_IsProgramFlashMemoryLocked Provides low voltage detection status
PLIB_NVM_LockBootMemory Provides low voltage detection status
PLIB_NVM_LockProgramFlashMemory Provides low voltage detection status
PLIB_NVM_LowVoltageEventIsActive Provides low voltage detection status
PLIB_NVM_LowVoltageIsDetected Provides low voltage error detection status
PLIB_NVM_MemoryModifyEnable Allows write cycles to Flash/EEPROM
PLIB_NVM_MemoryModifyInhibit Inhibits write cycles to Flash/EEPROM
PLIB_NVM_MemoryOperationSelect Selects the operation to be performed on Flash/EEPROM
memory.
PLIB_NVM_ProgramFlashBank1LowerRegion Provides low voltage detection status
PLIB_NVM_ProgramFlashBank2LowerRegion Provides low voltage detection status
PLIB_NVM_StopInIdleDisable Continues Flash operation when device enters idle mode.
PLIB_NVM_StopInIdleEnable Discontinues Flash operation when device enters idle mode.
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PLIB_NVM_WriteOperationHasTerminated This routine provides the status of the Flash/EEPROM write
operation or sequence.
5.6.13 Output Compare Peripheral Library
5.6.13.1 Introduction
Output Compare Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Output Compare Peripheral Library that is available on the Microchip family of
microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module without the
necessity of interacting directly with the module's registers, thereby hiding differences from one microcontroller variant to another.
Description
The Output Compare module is primarily used to generate a single pulse or a series of pulses in response to selected time base
events.
Output Compare module operation essentially requires a timer and one or two compare values. Users have an option to select
either a 32-bit timer or a 16-bit timer. The timer can be programmed to count at a desired frequency and count up to a desired
period value. Details regarding timer operation and setup can be found in the Timer Peripheral Library. The Output Compare
module compares the value of the timer with the compare values depending on the selected operating mode. When a compare
match occurs between a timer value and compare values, the Output Compare module outputs a change of state on its output
pins in accordance with the chosen Output Compare compare mode logic. Either a single pulse or a sequence of pulses may be
generated.
Some of the key operating modes of the OC module are:
• Single Compare Set High/Low modes: In these compare modes, a compare match between the timer and the buffer (primary
compare value) sets the output High/Low. The output remains at the same state after compare match event unless the
module is disabled or the mode is changed.
• Single Compare Toggle mode: Output toggles state at every compare match event between the timer and the buffer (primary
compare value)
• Dual compare Single/Continuous Pulse modes: These modes require two compare values. Leading edge of output pulse is
generated during compare match of the incrementing timer and the buffer (primary compare value). Trailing edge of output
pulse results when a compare match occurs between the incrementing timer and the pulse width value (secondary compare
value). The output may be a single pulse or a sequence of pulses.
• Pulse-Width Modulation (PWM) modes: In this mode, output goes high when a compare match occurs between timer and the
pulse width value (duty cycle). The output is reset back to its initial state when the timer resets after attaining its maximum
count.
The Output Compare module also provides programmable interrupt generation on a compare match event. In PWM mode,
hardware-based Fault detection and automatic output disable features are provided.
Figure 1 shows a block diagram of the Output Compare module. A compare match between the timer value and the compare
values generates a pulse at the output.
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Figure 1: Output Compare Module Block Diagram
Figure 2 shows a block diagram of the Output Compare module with dedicated timers, present on some devices. It facilitates the
use of multiple Output Compare modules operating synchronously or the use of an asynchronous trigger to generate a pulse.
Figure 2: Output Compare Module Block Diagram with Dedicated Timers
5.6.13.2 Release Notes
MPLAB Harmony Version: v0.70b Output Compare Peripheral Library Version :0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
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5.6.13.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.13.4 Using the Library
This topic describes the basic architecture of the Output Compare Peripheral Library and provides information and examples on
how to use it.
Interface Header File: plib_oc.h
The interface to the Output Compare Peripheral library is defined in the "plib_oc.h" header file. This file is included by the
"peripheral.h" file. Any C language source (.c) file that uses the Output Compare Peripheral Library should include "peripheral.h".
Library File:
The Output Compare Peripheral library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the Peripheral interacts with the framework.
5.6.13.4.1 Hardware Abstraction Model
This library provides the low-level abstraction of the Output Compare module on the Microchip family of microcontrollers with a
convenient C language interface. This topic describes how that abstraction is modeled in the software and introduces the library
interface.
Note: The interface provided is a superset of all the functionality of the available Output Compare modules on the device. Refer
to the specific device data sheet or related family reference manual section to determine the set of functions that are supported
for each Output Compare module on your device.
Description
The Output Compare Peripheral Library is used to simplify low-level access to the Output Compare module without having the
need to directly interact the module's registers. The function names are generic and lead to easier access to the Output
Compare module on different devices.
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Figure 3: Output Compare module Software Abstraction Block Diagram
The Output Compare module can be described from a software standpoint as having functions to configure the module itself, to
select the timer, set the buffer and pulse width values, and select the mode of operation. The desired nature of the output pulse
is thus obtained.
A 16-bit or a 32-bit timer can be selected for the output compare time base. In some devices, the Output Compare module can
be synchronized to an external input source. The Output Compare module can also operate asynchronously, based on a trigger
by an input source. The Output Compare module entails the use of some functions dealing with Timer set up. These details can
be found in Timer Peripheral Library.
Functions have been provided to set buffer values and pulse-width values. Pulse-width values are used only in Dual compare
and PWM modes. In PWM mode, the buffer value provides the initial duty cycle for the first time period, while all later time cycles
employ the 'pulse-width' value as the duty cycle value.
Compare modes:
• Single Compare Level Mode: Sets the output of Output Compare module at either 'High' or 'Low' at a compare match event
• Single Compare Toggle Mode: Toggles the output of OC module at each compare match event. This mode will produce
continuous pulses.
• Dual Compare Mode: Output Compare module output is driven 'High' on compare match with buffer value and driven 'Low' on
a compare match with the pulse-width value. The output can be either a single pulse or a continuous stream of pulses.
• PWM Mode: In Edge-aligned PWM mode, the Output Compare module output is driven 'High' whenever the timer resets, and
is driven 'Low' on a compare match with the pulse-width value. Faults may or may not be enabled. In Center-aligned PWM
mode, the Output Compare module output is driven 'High' on a compare match with the buffer value and driven 'Low' on a
compare match with the pulse-width value.
Note: In PWM mode, it is vital that the user selects the mode of operation before selecting a Fault input.
5.6.13.4.2 How the Library Works
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes.
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All of the interface functions in this library are classified according to:
• General Setup: These routines deal with general setup of Output Compare module
• Compare/PWM Mode: These routines facilitate the selection of a Compare/PWM mode and setting up the compare values
• Timer: These functions deal with configuring the timer, selection of the clock source, and setting up a synchronous or
asynchronous mode of operation for the OC module
• Power-Saving Modes:
• Sleep Mode: The Output Compare module output is driven to the same state as it was in prior to the device entering Sleep
mode. In PWM Fault mode, Fault detection is active. A Fault forces output of the OC module to tri-state or to a fixed
predetermined state.
• Idle Mode: The Output Compare module can be configured to suspend its operations or continue its operations. If the
Output Compare module suspends its operations, it has the same behavior as it does in Sleep mode.
• Faults: These functions are used to select Fault inputs and identify occurrences of Faults when the Output Compare module
functions in PWM mode
• Exists: These functions notify whether or not a particular feature is present on a device
The following sections provide examples that depict the use of interface functions to perform general tasks such as initialization
and set up of the Output Compare module and setting up the Output Compare module in different compare modes.
5.6.13.4.2.1 Single Compare Set High Mode
The Single Compare Set High mode sets the output of the Output Compare module 'High' at a compare match event. This
section illustrates the steps required to configure the Output Compare module in Single Compare Set High mode.
Example:
/* This example illustrates setting up Output Compare Module in Single Compare Set High
mode */
/* Configure Timer2 in 16-bit mode. Refer to Timer Peripheral Library for the
API */
/* Disable OC module */
PLIB_OC_Disable(MY_OC_ID);
/* Select Timer2 as timebase */
PLIB_OC_TimerSelect(MY_OC_ID, OC_TIMER_16BIT_TMR2);
/* Set period of time base. Refer to Timer Peripheral Library for the API */
/* Select compare mode */
PLIB_OC_ModeSelect(MY_OC_ID, OC_SET_HIGH_SINGLE_PULSE_MODE);
/* Set buffer size to 16-bits */
PLIB_OC_BufferSizeSelect(MY_OC_ID, OC_BUFFER_SIZE_16BIT);
/* Set buffer value */
PLIB_OC_Buffer16BitSet(MY_OC_ID, 0x00FF);
/* Configure interrupts associated with Output Compare module. Refer to
Timer Peripheral Library for the API */
/* Enable Timer2. Refer to Timer Peripheral Library for the API */
/* Enable the Output Compare module */
PLIB_OC_Enable(MY_OC_ID);
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5.6.13.4.2.2 Single Compare Toggle Mode
The Single Compare Toggle mode toggles the output of the Output Compare module at each compare match event. This section
illustrates the steps required to configure the Output Compare module in Single Compare Toggle mode.
Example:
/* This example illustrates setting up Output Compare Module in Single Compare Toggle mode */
/* Configure Timer2 in 16-bit mode. Refer to Timer Peripheral Library for
the API */
/* Disable OC module */
PLIB_OC_Disable(MY_OC_ID);
/* Select Timer2 as timebase */
PLIB_OC_TimerSelect(MY_OC_ID, OC_TIMER_16BIT_TMR2);
/* Set period of time base. Refer to Timer Peripheral Library for the API */
/* Select compare mode */
PLIB_OC_ModeSelect(MY_OC_ID, OC_TOGGLE_CONTINOUS_PULSE_MODE);
/* Set buffer size to 16-bits */
PLIB_OC_BufferSizeSelect(MY_OC_ID, OC_BUFFER_SIZE_16BIT);
/* Set Buffer Value */
PLIB_OC_Buffer16BitSet(MY_OC_ID, 0x00FF);
/* Configure interrupts associated with Output Compare module. Refer to
Interrupts Peripheral Library for the API */
/* Enable Timer2. Refer to Timer Peripheral Library for the API */
/* Enable Output Compare module */
PLIB_OC_Enable(MY_OC_ID);
5.6.13.4.2.3 Dual Compare Continuous Mode
In this mode, the Output Compare module output is driven 'High' on a compare match with the buffer value and driven 'Low' on a
compare match with the pulse-width value. A continuous stream of pulses is generated. This section illustrates the steps
required to configure the Output Compare module in Dual Compare Continuous Pulse mode.
Example:
/* This example illustrates setting up Output Compare Module in Dual Compare Continuous Pulse
mode */
/* Configure Timer2 in 16-bit mode. Refer to Timer Peripheral Library for
the API */
/* Disable OC module */
PLIB_OC_Disable(MY_OC_ID);
/* Select Timer2 as timebase */
PLIB_OC_TimerSelect(MY_OC_ID, OC_TIMER_16BIT_TMR2);
/* Set period of time base. Refer to Timer Peripheral Library for the API */
/* Select compare mode */
PLIB_OC_ModeSelect(MY_OC_ID, OC_DUAL_COMPARE_CONTINUOUS_PULSE_MODE);
/* Set buffer size to 16-bits */
PLIB_OC_BufferSizeSelect(MY_OC_ID, OC_BUFFER_SIZE_16BIT);
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/* Set buffer(primary compare) value */
PLIB_OC_Buffer16BitSet(MY_OC_ID, 0x00FF);
/*Set pulse width(secondary compare) value */
PLIB_OC_PulseWidth16BitSet(MY_OC_ID, 0x0FFF);
/* Configure interrupts associated with Output Compare module. Refer to
Interrupts Peripheral Library for the API */
/* Enable Timer2. Refer to Timer Peripheral Library for the API */
/* Enable the Output Compare module */
PLIB_OC_Enable(MY_OC_ID);
5.6.13.4.2.4 PWM Mode with Enabled Faults
This section illustrates the steps required to configure the Output Compare module in PWM mode.
Note: In PWM mode, it is vital that the user selects the mode of operation before selecting a Fault input.
Example:
/* This example illustrates setting up Output Compare Module in Dual Compare Continuous Pulse
mode */
/* Configure Timer2 in 16-bit mode. Refer to Timer Peripheral Library for the API */
/* Disable OC module */
PLIB_OC_Disable(MY_OC_ID);
/* Select Timer2 as timebase */
PLIB_OC_TimerSelect(MY_OC_ID, OC_TIMER_16BIT_TMR2);
/* Set period of time base. Refer to Timer Peripheral Library for the API */
/* Select compare mode. PWM Edge aligned mode is selected */
PLIB_OC_ModeSelect(MY_OC_ID, OC_COMPARE_PWM_EDGE_ALIGNED_MODE );
/* Select Fault input. In Output Compare modules that do not have dedicated timers,
fault selection is preset in hardware */
PLIB_OC_FaultInputSelect(MY_OC_ID, OC_FAULT_PRESET);
/* Set buffer size to 16-bits. Refer to Timer Peripheral Library for the API */
PLIB_OC_BufferSizeSelect(MY_OC_ID, OC_BUFFER_SIZE_16BIT);
/* Set buffer (initial duty cycle) Value */
PLIB_OC_Buffer16BitSet(MY_OC_ID, 0x00FF);
/*Set pulse width (Duty cycle) value */
PLIB_OC_PulseWidth16BitSet(MY_OC_ID, 0x0FFF);
/* Configure interrupts associated with Output Compare module. Refer to
Interrupts Peripheral Library for the API */
/* Enable Timer2. Refer to Timer Peripheral Library for the API */
/* Enable OC module */
PLIB_OC_Enable(MY_OC_ID);
/* Check for PWM Fault */
while(!PLIB_OC_FaultHasOccurred)
{
/* If no PWM fault, continue normal operation*/
}
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5.6.13.4.3 Configuring the Library
The library is configured for the supported processor when the processor is chosen in the MPLAB IDE.
5.6.13.5 Library Interface
Data Types and Constants
Name Description
OC_16BIT_TIMERS Lists different 16 bit time bases for OC module
OC_BUFFER_SIZE Lists different buffer sizes for compare value
OC_CLOCK_RESOLUTION Lists different PWM resolutions for PWM mode and OC output falling edge
delay for compare modes
OC_COMPARE_MODES Lists different compare modes for OC module
OC_FAULT_MODES Lists modes to clear fault mode
OC_FAULT_OUT Provides state of OC output pin when a fault occurs
OC_FAULT_TRISTATE Lists modes to clear fault mode
OC_FAULTS Lists different fault sources for OC module
OC_MODULE_ID OC_MODULE_ID
This enumeration defines number of modules which are available on the
microcontroller. This is the super set of all the possible instances that might be
available on Microchip microcontrollers.
Refer to the specific device data sheet to get the correct number of modules
defined for the desired microcontroller.
OC_SYNC_MODES Lists different synchronization modes for OC module
OC_SYNC_SOURCES Lists different synchronization sources for OC module
OC_TRIGGER_STATUS_MODES Lists different trigger status reset modes for OC module
Compare Mode Functions
Name Description
PLIB_OC_Buffer16BitSet Sets a 16-bit primary compare value for compare operations.
PLIB_OC_Buffer32BitSet Sets a 32-bit primary compare value for compare operations.
PLIB_OC_BufferSizeSelect Sets the buffer size and pulse width to 16-bits or 32-bits.
PLIB_OC_PulseWidth16BitSet Sets a 16-bit pulse width for OC module output.
PLIB_OC_PulseWidth32BitSet Sets a 32-bit pulse width for OC module output.
PLIB_OC_PWMDutyCycleResolutionSet Sets the PWM duty cycle resolution and delays the falling edge of OC
output in compare modes.
Faults Functions
Name Description
PLIB_OC_FaultHasOccurred Checks if a PWM fault has occurred.
PLIB_OC_FaultInputSelect Selects a Fault input for the OC module.
PLIB_OC_FaultModeSelect Selects an automatic or software-based mode to clear the Fault.
PLIB_OC_FaultOutSelect OC output pin is driven to a known state on a Fault.
PLIB_OC_FaultTristateSelect The OC module output can be tristated or driven to a known state when a Fault
occurs.
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Feature Existence Functions
Name Description
PLIB_OC_ExistsAlternateClock Identifies whether the AlternateClock feature exists on the OC
module
PLIB_OC_ExistsBufferSize Identifies whether the BufferSize feature exists on the OC
module.
PLIB_OC_ExistsBufferValue Identifies whether the BufferValue feature exists on the OC
module.
PLIB_OC_ExistsCompareModeSelect Identifies whether the CompareModeSelect feature exists on
the OC module.
PLIB_OC_ExistsEnableControl Identifies whether the EnableControl feature exists on the OC
module.
PLIB_OC_ExistsFaultInput Identifies whether the FaultInput feature exists on the OC
module.
PLIB_OC_ExistsFaultModeSelect Identifies whether the FaultModeSelect feature exists on the
OC module.
PLIB_OC_ExistsFaultOutSelect Identifies whether the FaultOut feature exists on the OC
module.
PLIB_OC_ExistsFaultStatus Identifies whether the FaultStatus feature exists on the OC
module.
PLIB_OC_ExistsFaultTristateSelect Identifies whether the FaultTristateSelect feature exists on the
OC module.
PLIB_OC_ExistsPolarityInvert Identifies whether the PolarityInvert feature exists on the OC
module.
PLIB_OC_ExistsPulseWidth Identifies whether the PulseWidth feature exists on the OC
module.
PLIB_OC_ExistsPWMDutyCycleResolutionControl Identifies whether the PWMDutyCycleResolution feature exists
on the OC module.
PLIB_OC_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the OC
module.
PLIB_OC_ExistsSyncModeSelect Identifies whether the SyncModeSelect feature exists on the
OC module.
PLIB_OC_ExistsSyncSourceSelect Identifies whether the SyncSourceSelect feature exists on the
OC module.
PLIB_OC_ExistsTimerSelect Identifies whether the TimerSelect feature exists on the OC
module.
PLIB_OC_ExistsTimerTriggered Identifies whether the TimerTriggered feature exists on the OC
module.
PLIB_OC_ExistsTriggerControl Identifies whether the TriggerControl feature exists on the OC
module.
PLIB_OC_ExistsTriggerStatusModeSelect Identifies whether the TriggerStatusModeSelect feature exists
on the OC module.
General Setup Functions
Name Description
PLIB_OC_Disable Disable the OC module
PLIB_OC_Enable Enables the OC module.
PLIB_OC_ModeSelect Selects the compare mode for the OC module.
PLIB_OC_PolarityInvertedDisable Disables OC module output inversion polarity.
PLIB_OC_PolarityInvertedEnable Output compare polarity is inverted.
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Power-Saving Modes Functions
Name Description
PLIB_OC_StopInIdleDisable OC module continues operating when the device enters Idle mode
PLIB_OC_StopInIdleEnable Discontinues OC module operation when the device enters Idle mode
Timer Functions
Name Description
PLIB_OC_IsTriggered Checks whether or not a timer source has been triggered.
PLIB_OC_SyncModeSelect Selects the synchronization mode for the OC module.
PLIB_OC_SyncSourceSelect Selects the input source for synchronous or asynchronous (triggered)
operation of the OC module.
PLIB_OC_TimerSelect Selects a clock source for the OC module.
PLIB_OC_TriggerClear Clears the trigger status for the OC module.
PLIB_OC_TriggerSet Sets the trigger status for the OC module.
PLIB_OC_TriggerStatusModeSelect Selects the trigger status reset mode.
PLIB_OC_AlternateClockDisable Selects Timer 2/3.instead of the alternate clock source.
PLIB_OC_AlternateClockEnable Selects the alternate clock source.
Description
5.6.13.5.1 General Setup Functions
5.6.13.5.1.1 PLIB_OC_Disable Function
C
void PLIB_OC_Disable(
OC_MODULE_ID index
);
Description
This function disables the OC module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the OC module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsEnableControl in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
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PLIB_OC_Disable(MY_OC_ID);
5.6.13.5.1.2 PLIB_OC_Enable Function
C
void PLIB_OC_Enable(
OC_MODULE_ID index
);
Description
This function enables the OC module.
Preconditions
The module should be appropriately configured before being enabled.
Parameters
Parameters Description
index Identifies the desired OC module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsEnableControl in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
//Do all the other configurations before enabling.
PLIB_OC_Enable(MY_OC_ID);
5.6.13.5.1.3 PLIB_OC_ModeSelect Function
C
void PLIB_OC_ModeSelect(
OC_MODULE_ID index,
OC_COMPARE_MODES cmpMode
);
Description
This function selects the compare mode for the OC module.
Preconditions
The OC module must be turned off before a new mode is selected. The OC module is turned off via
PLIB_OC_ModeSelect(MY_OC_ID,OC_COMPARE_TURN_OFF_MODE)
Parameters
Parameters Description
index Identifies the desired OC module
cmpMode Identifies the compare mode for OC module
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsCompareModeSelect in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
// Dual compare continuous pulse mode is selected
PLIB_OC_ModeSelect(MY_OC_ID, OC_DUAL_COMPARE_CONTINUOUS_PULSE_MODE );
5.6.13.5.1.4 PLIB_OC_PolarityInvertedDisable Function
C
void PLIB_OC_PolarityInvertedDisable(
OC_MODULE_ID index
);
Description
This function disables polarity inversion of OC module output.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired OC module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsPolarityInvert in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
// Polarity of OC module output is Non-inverted
PLIB_OC_PolarityInvertedDisable(OC_MODULE_ID index);
5.6.13.5.1.5 PLIB_OC_PolarityInvertedEnable Function
C
void PLIB_OC_PolarityInvertedEnable(
OC_MODULE_ID index
);
Description
This function inverts the polarity of the OC module output.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired OC module
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsPolarityInvert in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
// Invert polarity of OC module output
PLIB_OC_PolarityInvertedEnable(MY_OC_ID);
5.6.13.5.2 Compare Mode Functions
5.6.13.5.2.1 PLIB_OC_Buffer16BitSet Function
C
void PLIB_OC_Buffer16BitSet(
OC_MODULE_ID index,
uint16_t val16Bit
);
Description
This function sets a 16-bit primary compare value for compare operations in all modes except PWM modes.
Preconditions
The PWM mode of operation should not be selected. The buffer size should be set to 16-bits by the PLIB_OC_BufferSizeSelect()
function.
Parameters
Parameters Description
index Identifies the desired OC module
val16Bit Sets a 16-bit primary compare value
Returns
None
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsBufferValue in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
PLIB_OC_Buffer16BitSet(MY_OC_ID, 0x00FF);
5.6.13.5.2.2 PLIB_OC_Buffer32BitSet Function
C
void PLIB_OC_Buffer32BitSet(
OC_MODULE_ID index,
uint32_t val32Bit
);
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Description
This function sets a 32-bit primary compare value for compare operations in all modes except PWM modes.
Preconditions
The PWM mode of operation should not be selected. The buffer size should be set to 32-bits by the PLIB_OC_BufferSizeSelect()
function.
Parameters
Parameters Description
index Identifies the desired OC module
val32Bit Sets a 32-bit primary compare value
Returns
None
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsBufferValue in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
PLIB_OC_Buffer32BitSet(MY_OC_ID, 0x000000FF);
5.6.13.5.2.3 PLIB_OC_BufferSizeSelect Function
C
void PLIB_OC_BufferSizeSelect(
OC_MODULE_ID index,
OC_BUFFER_SIZE size
);
Description
This function sets the size of the buffer and pulse width to 16-bits or 32-bits. The choice is made based on whether a 16-bit timer
or a 32-bit timer is selected.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired OC module
size Identifies the size of compare value
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsBufferSize in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
// Buffer size and pulse width size are set to 32-bits
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PLIB_OC_BufferSizeSelect(MY_OC_ID, OC_BUFFER_SIZE_32BIT);
5.6.13.5.2.4 PLIB_OC_PulseWidth16BitSet Function
C
void PLIB_OC_PulseWidth16BitSet(
OC_MODULE_ID index,
uint16_t pulseWidth
);
Description
This function sets a 16-bit pulse width for the OC module in dual compare modes. A dual compare mode can be selected using
the PLIB_OC_ModeSelect() function. Secondary compare match event (pulse width) decides the trailing (falling) edge of the OC
module output.
Preconditions
Dual compare operation should be selected. The buffer size should be set to 16-bits by the PLIB_OC_BufferSizeSelect() function.
Parameters
Parameters Description
index Identifies the desired OC module
pulseWidth Pulse width value
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsPulseWidth in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
PLIB_OC_PulseWidth16BitSet(MY_OC_ID, 0x0FFF);
5.6.13.5.2.5 PLIB_OC_PulseWidth32BitSet Function
C
void PLIB_OC_PulseWidth32BitSet(
OC_MODULE_ID index,
uint32_t pulseWidth
);
Description
This function sets a 32-bit pulse width for OC module in dual compare modes. A dual compare mode can be selected using
PLIB_OC_ModeSelect() routine. Secondary compare match event (pulse width) decides the trailing(falling) edge of OC module
output.
Preconditions
Dual compare operation should be selected. The buffer size should be set to 32-bits by the PLIB_OC_BufferSizeSelect() function.
Parameters
Parameters Description
index Identifies the desired OC module
pulseWidth Pulse width value
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsPulseWidth in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
PLIB_OC_PulseWidth32BitSet(MY_OC_ID, 0x00000FFF);
5.6.13.5.2.6 PLIB_OC_PWMDutyCycleResolutionSet Function
C
void PLIB_OC_PWMDutyCycleResolutionSet(
OC_MODULE_ID index,
OC_CLOCK_RESOLUTION clkResolution
);
Description
This function sets the PWM duty cycle resolution in PWM mode and delays the falling edge of OC output in compare modes.
Preconditions
Dual compare mode must be selected for this function.
Parameters
Parameters Description
index Identifies the desired OC module
clkResolution Select clock resolution
Returns
None
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsPWMDutyCycleResolutionControl in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
PLIB_OC_PWMDutyCycleResolutionSet(MY_OC_ID,OC_CLOCK_P1);
5.6.13.5.3 Timer Functions
5.6.13.5.3.1 PLIB_OC_IsTriggered Function
C
bool PLIB_OC_IsTriggered(
OC_MODULE_ID index
);
Description
This function checks whether Output Compare timer has been triggered or not. This function returns 'true' if OC timer is triggered
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and running and 'false' if the OC timer is cleared and stopped.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired OC module
Returns
bool - true - OC timer is triggered and running
• false - OC timer is stopped and held in clear
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsTimerTriggered in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
if(!PLIB_OC_IsTriggered(MY_OC_ID))
{
// Do some operation
};
5.6.13.5.3.2 PLIB_OC_SyncModeSelect Function
C
void PLIB_OC_SyncModeSelect(
OC_MODULE_ID index,
OC_SYNC_MODES mode
);
Description
This function selects the synchronization mode for Othe OC module. The Synchronous or Asynchronous mode of operation can
be selected.
Preconditions
If Asynchronous mode is selected and an OC trigger is selected, that OC module must be disabled first before enabling the
trigger functionality.
Parameters
Parameters Description
index Identifies the desired OC module
mode Identifies the mode (Synchronous or Asynchronous)
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsSyncModeSelect in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
// Synchronous mode of operation is selected.
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PLIB_OC_SyncModeSelect(MY_OC_ID, OC_MODE_SYNC);
5.6.13.5.3.3 PLIB_OC_SyncSourceSelect Function
C
void PLIB_OC_SyncSourceSelect(
OC_MODULE_ID index,
OC_SYNC_SOURCES src
);
Description
This function selects the input source for synchronous or asynchronous (triggered) operation of the OC module.
Preconditions
If an OC trigger is selected, that OC module must be disabled before it is configured to be used as a trigger to the next OC
module.
Parameters
Parameters Description
index Identifies the desired OC module
src Identifies the input source
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsSyncSourceSelect in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
//Input Capture is selected as the input source
PLIB_OC_SyncSourceSelect(MY_OC_ID, OC_SYNC_SOURCE_IC6);
5.6.13.5.3.4 PLIB_OC_TimerSelect Function
C
void PLIB_OC_TimerSelect(
OC_MODULE_ID index,
OC_16BIT_TIMERS tmr
);
Description
This function selects a clock source for the OC module if the 16-bit time base is set.
Preconditions
The 16-bit time base needs to be set.
Parameters
Parameters Description
index Identifies the desired OC module
tmr Identifies the timer
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsTimerSelect in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
// 16-bit Timer2 is selected
PLIB_OC_TimerSelect(MY_OC_ID, OC_TIMER_16BIT_TMR2);
5.6.13.5.3.5 PLIB_OC_TriggerClear Function
C
void PLIB_OC_TriggerClear(
OC_MODULE_ID index
);
Description
This function clears the trigger status for the OC module.
Preconditions
Dual compare mode must be selected for this function.
Parameters
Parameters Description
index Identifies the desired OC module
Returns
None
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsTriggerControl in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
PLIB_OC_TriggerClear(MY_OC_ID);
5.6.13.5.3.6 PLIB_OC_TriggerSet Function
C
void PLIB_OC_TriggerSet(
OC_MODULE_ID index
);
Description
This function sets the trigger status for the OC module.
Preconditions
Dual compare mode must be selected for this function.
Parameters
Parameters Description
index Identifies the desired OC module
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsTriggerControl in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
PLIB_OC_TriggerSet(MY_OC_ID);
5.6.13.5.3.7 PLIB_OC_TriggerStatusModeSelect Function
C
void PLIB_OC_TriggerStatusModeSelect(
OC_MODULE_ID index,
OC_TRIGGER_STATUS_MODES modes
);
Description
This function lets the user to reset the trigger status via software or a compare match.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired OC module
modes Identifies the trigger status reset mode
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsTriggerStatusModeSelect in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
//Trigger status is reset by compare match
PLIB_OC_TriggerStatusModeSelect(MY_OC_ID, OC_TRIGGER_STATUS_MATCH);
5.6.13.5.3.8 PLIB_OC_AlternateClockDisable Function
C
void PLIB_OC_AlternateClockDisable(
OC_MODULE_ID index
);
Description
Selects Timer 2/3.instead of the alternate clock source.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired OC module
Returns
None.
Remarks
The feature is not supported on all devices. Check your device's data sheet. A system unlock must be performed before this
function can be executed. This function applies to all input capture modules, regardless of the OC_MODULE_ID passed in the
call.
Example
// Call system service to unlock oscillator
#define MY_OC_ID OC_ID_1
PLIB_OC_AlternateClockDisable( MY_OC_ID );
5.6.13.5.3.9 PLIB_OC_AlternateClockEnable Function
C
void PLIB_OC_AlternateClockEnable(
OC_MODULE_ID index
);
Description
Selects the alternate clock source instead of Timer 2/3.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired OC module
Returns
None.
Remarks
The feature is not supported on all devices. Check your device's data sheet. A system unlock must be performed before this
function can be executed. This function applies to all input capture modules, regardless of the OC_MODULE_ID passed in the
call.
Example
// Call system service to unlock oscillator
#define MY_OC_ID OC_ID_1
PLIB_OC_AlternateClockEnable( MY_OC_ID );
5.6.13.5.4 Power-Saving Modes Functions
5.6.13.5.4.1 PLIB_OC_StopInIdleDisable Function
C
void PLIB_OC_StopInIdleDisable(
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OC_MODULE_ID index
);
Description
The function continues OC module operation when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired OC module
Returns
None
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsStopInIdle in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
PLIB_OC_StopInIdleDisable(MY_OC_ID);
5.6.13.5.4.2 PLIB_OC_StopInIdleEnable Function
C
void PLIB_OC_StopInIdleEnable(
OC_MODULE_ID index
);
Description
This function discontinues OC module operation when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired OC module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsStopInIdle in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
PLIB_OC_StopInIdleEnable(MY_OC_ID);
5.6.13.5.5 Faults Functions
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5.6.13.5.5.1 PLIB_OC_FaultHasOccurred Function
C
bool PLIB_OC_FaultHasOccurred(
OC_MODULE_ID index
);
Description
This function returns 'true' if a PWM Fault has occurred and 'false' if no Fault condition exists.
Preconditions
This function should be used only in Edge or Center-Aligned PWM mode set by the PLIB_OC_ModeSelect() function.
Parameters
Parameters Description
index Identifies the desired OC module
Returns
bool - true - PWM Fault has occurred
• false - No PWM fault
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsFaultStatus in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
if(!PLIB_OC_FaultHasOccurred(MY_OC_ID))
{
// Do some operation
};
5.6.13.5.5.2 PLIB_OC_FaultInputSelect Function
C
void PLIB_OC_FaultInputSelect(
OC_MODULE_ID index,
OC_FAULTS flt
);
Description
This function selects a Fault input for the OC module.
Preconditions
Set the operation mode using PLIB_OC_ModeSelect() before selecting the Fault input.
Parameters
Parameters Description
index Identifies the desired OC module
flt Identifies the OC fault input
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsFaultInput in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
// Fault B is enabled for Output Compare Module
PLIB_OC_FaultInputSelect(MY_OC_ID, OC_FAULT_B);
5.6.13.5.5.3 PLIB_OC_FaultModeSelect Function
C
void PLIB_OC_FaultModeSelect(
OC_MODULE_ID index,
OC_FAULT_MODES modes
);
Description
This function selects a mode to clear the Fault mode. The Fault mode can be reset automatically or by software once the Fault
source ceases to exist.
Preconditions
Set the operation mode using PLIB_OC_ModeSelect() routine before selecting the fault input.
Parameters
Parameters Description
index Identifies the desired OC module
modes Identifies the mode to reset Fault status
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsFaultModeSelect in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
// Fault mode is maintained even after fault ceases. Fault mode is reset in software.
PLIB_OC_FaultModeSelect(MY_OC_ID, OC_SOFTWARE_CLEAR);
5.6.13.5.5.4 PLIB_OC_FaultOutSelect Function
C
void PLIB_OC_FaultOutSelect(
OC_MODULE_ID index,
OC_FAULT_OUT fltState
);
Description
This function sets OC output to a known state on occurrence of a Fault in Edge or Center-Aligned PWM modes.
Preconditions
Edge or Center-Aligned PWM mode with Faults enabled should be selected. OC module output tristate should be disabled on
occurrence of a Fault via PLIB_OC_TriStateDisable().
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Parameters
Parameters Description
index Identifies the desired OC module
fltState Identifies the high or low state to which the output is driven on a fault
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsFaultOutSelect in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
//PWM output is set to High on occurrence of fault
PLIB_OC_FaultOutSelect(MY_OC_ID,OC_HIGH);
5.6.13.5.5.5 PLIB_OC_FaultTristateSelect Function
C
void PLIB_OC_FaultTristateSelect(
OC_MODULE_ID index,
OC_FAULT_TRISTATE tristateSel
);
Description
This function is used to enable or disable tristating of OC module outputs when a Fault occurs.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired OC module
tristateSel Enable/Disable Tristate
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OC_ExistsFaultTristateSelect in your application to determine whether this feature is available.
Example
#define MY_OC_ID OC_ID_1
//Tristate OC module output
PLIB_OC_FaultTristateSelect(MY_OC_ID,OC_ENABLE_TRISTATE);
5.6.13.5.6 Data Types and Constants
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5.6.13.5.6.1 OC_16BIT_TIMERS Enumeration
C
typedef enum {
OC_TIMER_16BIT_TMR2,
OC_TIMER_16BIT_TMR3,
OC_TIMER_16BIT_TMR4,
OC_TIMER_16BIT_TMR5,
OC_TIMER_16BIT_TMR1,
OC_TIMER_PTG,
OC_TIMER_PERIPHERAL_CLK
} OC_16BIT_TIMERS;
Description
OC 16 bit Timer Select
This enumeration lists different 16 bit time bases for OC module. The time base is set by PLIB_OC_TimerSelect() routine.
Members
Members Description
OC_TIMER_16BIT_TMR2 Clock source of Timer2 is the clock source of OC module
OC_TIMER_16BIT_TMR3 Clock source of Timer3 is the clock source of OC module
OC_TIMER_16BIT_TMR4 Clock source of Timer4 is the clock source of OC module
OC_TIMER_16BIT_TMR5 Clock source of Timer5 is the clock source of OC module
OC_TIMER_16BIT_TMR1 Clock source of Timer1 is the clock source of OC module
OC_TIMER_PTG Peripheral Trigger Generator output is the clock source for OC module
OC_TIMER_PERIPHERAL_CLK Peripheral clock is the clock source for OC module
5.6.13.5.6.2 OC_BUFFER_SIZE Enumeration
C
typedef enum {
OC_BUFFER_SIZE_16BIT,
OC_BUFFER_SIZE_32BIT
} OC_BUFFER_SIZE;
Description
OC Buffer Size
This enumeration lists different buffer sizes for compare value. and duty cycle value.
Members
Members Description
OC_BUFFER_SIZE_16BIT Buffer size is 16-bits. Duty cycle and compare values will have 16-bit values.
OC_BUFFER_SIZE_32BIT Buffer size is 32-bits. Duty cycle and compare values will have 32-bit values.
5.6.13.5.6.3 OC_CLOCK_RESOLUTION Enumeration
C
typedef enum {
OC_CLOCK_P1,
OC_CLOCK_P2,
OC_CLOCK_P3,
OC_CLOCK_P4
} OC_CLOCK_RESOLUTION;
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Description
OC PWM Clock Resolution
Lists different PWM resolutions in PWM mode and falling edge delay of Output Compare module output in compare modes.
Members
Members Description
OC_CLOCK_P1 OC output falling edge transitionson rising edge of P1 clock
OC_CLOCK_P2 OC output falling edge transitionson rising edge of P2 clock
OC_CLOCK_P3 OC output falling edge transitionson rising edge of P3 clock
OC_CLOCK_P4 OC output falling edge transitionson rising edge of P4 clock
5.6.13.5.6.4 OC_COMPARE_MODES Enumeration
C
typedef enum {
OC_COMPARE_PWM_CENTER_ALIGNED_MODE,
OC_COMPARE_PWM_EDGE_ALIGNED_MODE,
OC_DUAL_COMPARE_CONTINUOUS_PULSE_MODE,
OC_DUAL_COMPARE_SINGLE_PULSE_MODE,
OC_TOGGLE_CONTINUOUS_PULSE_MODE,
OC_SET_LOW_SINGLE_PULSE_MODE,
OC_SET_HIGH_SINGLE_PULSE_MODE,
OC_COMPARE_TURN_OFF_MODE
} OC_COMPARE_MODES;
Description
OC Compare Modes
This enumeration lists different compare modes for OC module. The compare mode is set by PLIB_OC_ModeSelect() routine.
Members
Members Description
OC_COMPARE_PWM_CENTER_ALIGNED_MODE PWM center aligned mode: OC module output is a center aligned
PWM signal
OC_COMPARE_PWM_EDGE_ALIGNED_MODE PWM edge aligned mode: OC module output is an edge aligned PWM
signal
OC_DUAL_COMPARE_CONTINUOUS_PULSE_MODE Dual Compare, Continuous Pulse mode: OC module output is driven
high on compare match with primary compare value and driven low on
compare match with secondary compare value. A continuous stream
of pulses is generated unless the compare mode is changed or the
module is disabled. If the secondary compare value is greater than
time base period value, secondary compare match does not occur. As
a consequence, OC module output stays high.
OC_DUAL_COMPARE_SINGLE_PULSE_MODE Dual Compare, Single Pulse mode: OC module output is driven high
on compare match with primary compare value and driven low on
compare match with secondary compare value. If the secondary
compare value is greater than time base period value, secondary
compare match does not occur. As a consequence, OC module
output stays high until a mode change is made or module is disabled
OC_TOGGLE_CONTINUOUS_PULSE_MODE Single Compare Toggle mode: OC module output is initialized to Low.
OC module output toggles at every compare match event with primary
compare value with a single peripheral bus clock cycle delay. This
scheme generates a square wave with 50% duty cycle. An interrupt is
generated each time the ouput toggles.
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OC_SET_LOW_SINGLE_PULSE_MODE Single Compare Set Low mode: A compare match event with primary
compare value will set the output of OC module 'Low' with a single
peripheral bus clock cycle delay. Output stays Low unless OC module
is disabled or a new compare mode is chosen. An interrupt is
generated at compare match event. OC module output is initially
forced High.
OC_SET_HIGH_SINGLE_PULSE_MODE Single Compare Set High mode: A compare match event with primary
compare value will set the output of OC module 'High' with a single
peripheral bus clock cycle delay. Output stays High unless OC module
is disabled or a new compare mode is chosen. An interrupt is
generated at compare match event. OC module output is initially
forced Low.
OC_COMPARE_TURN_OFF_MODE Turn OFF mode: OC module is disabled but still draws current. This
mode is used to temporarily turn OFF the OC module before a new
compare mode is selected
5.6.13.5.6.5 OC_FAULT_MODES Enumeration
C
typedef enum {
OC_SOFTWARE_CLEAR,
OC_AUTOMATIC_CLEAR
} OC_FAULT_MODES;
Description
OC Fault Clear Modes
This enumeration lists modes to clear fault mode after the fault source is removed.
Members
Members Description
OC_SOFTWARE_CLEAR Fault mode needs to be cleared in software after the fault source is removed.
OC_AUTOMATIC_CLEAR Fault mode is is cleared automatically once fault source is removed.
5.6.13.5.6.6 OC_FAULT_OUT Enumeration
C
typedef enum {
OC_FAULT_LOW,
OC_FAULT_HIGH
} OC_FAULT_OUT;
Description
OC Fault Output State
This enumeration lists different states of OC output pin when a fault occurs.
Members
Members Description
OC_FAULT_LOW OC output is driven low when fault occurs.
OC_FAULT_HIGH OC output is driven high when fault occurs.
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5.6.13.5.6.7 OC_FAULT_TRISTATE Enumeration
C
typedef enum {
OC_DISABLE_TRISTATE,
OC_ENABLE_TRISTATE
} OC_FAULT_TRISTATE;
Description
OC Fault Output Tristate select
This enumeration lists modes to clear fault mode after the fault source is removed.
Members
Members Description
OC_DISABLE_TRISTATE OC module outputs are set in a known state on the occurrence of a fault
OC_ENABLE_TRISTATE OC module outputs are tristated on the occurrence of a fault
5.6.13.5.6.8 OC_FAULTS Enumeration
C
typedef enum {
OC_FAULT_A,
OC_FAULT_B,
OC_FAULT_C,
OC_FAULT_PRESET,
OC_FAULT_DISABLE
} OC_FAULTS;
Description
OC Fault Select
This enumeration lists different fault sources for OC module. The fault source is selected by PLIB_OC_CompareClockSelect()
routine.
Members
Members Description
OC_FAULT_A Fault A input
OC_FAULT_B Fault B input
OC_FAULT_C Fault C input
OC_FAULT_PRESET Preset hardware fault input. This value is used for OC modules that have a preset
hardware configured fault input selection.
OC_FAULT_DISABLE Faults are disabled. PWM operation without faults.
5.6.13.5.6.9 OC_MODULE_ID Enumeration
C
typedef enum {
OC_ID_1,
OC_ID_2,
OC_ID_3,
OC_NUMBER_OF_MODULES
} OC_MODULE_ID;
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Description
OC_MODULE_ID
This enumeration defines number of modules which are available on the microcontroller. This is the super set of all the possible
instances that might be available on Microchip microcontrollers.
Refer to the specific device data sheet to get the correct number of modules defined for the desired microcontroller.
Members
Members Description
OC_NUMBER_OF_MODULES The total number of modules available.
5.6.13.5.6.10 OC_SYNC_MODES Enumeration
C
typedef enum {
OC_MODE_TRIGGER,
OC_MODE_SYNC
} OC_SYNC_MODES;
Description
OC Synchronization modes Status
This enumeration lists different synchronization modes for OC module timer. The timer can be made to operate synchronously
with an external input or asynchronously on receiving an input trigger.
Members
Members Description
OC_MODE_TRIGGER OC module is asynchronously triggered by a chosen trigger input source
OC_MODE_SYNC OC module is synchronized to the input source
5.6.13.5.6.11 OC_SYNC_SOURCES Enumeration
C
typedef enum {
OC_SYNC_SOURCE_NONE,
OC_SYNC_SOURCE_OC1,
OC_SYNC_SOURCE_OC2,
OC_SYNC_SOURCE_OC3,
OC_SYNC_SOURCE_OC4,
OC_SYNC_SOURCE_OC5,
OC_SYNC_SOURCE_OC6,
OC_SYNC_SOURCE_OC7,
OC_SYNC_SOURCE_OC8,
OC_SYNC_SOURCE_OC9,
OC_SYNC_SOURCE_PTG,
OC_SYNC_SOURCE_TMR1,
OC_SYNC_SOURCE_TMR2,
OC_SYNC_SOURCE_TMR3,
OC_SYNC_SOURCE_TMR4,
OC_SYNC_SOURCE_TMR5,
OC_SYNC_SOURCE_IC1,
OC_SYNC_SOURCE_IC2,
OC_SYNC_SOURCE_IC3,
OC_SYNC_SOURCE_IC4,
OC_SYNC_SOURCE_IC5,
OC_SYNC_SOURCE_IC6,
OC_SYNC_SOURCE_IC7,
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OC_SYNC_SOURCE_IC8,
OC_SYNC_SOURCE_CMP1,
OC_SYNC_SOURCE_CMP2,
OC_SYNC_SOURCE_CMP3,
OC_SYNC_SOURCE_AD,
OC_SYNC_SOURCE_CTMU,
OC_SYNC_SOURCE_INT1,
OC_SYNC_SOURCE_INT2
} OC_SYNC_SOURCES;
Description
OC Synchronization Sources
This enumeration lists all the input sources for synchronous and asynchronously triggered operation. OC module timer can be
synchronized to an input source or operate asynchronously on the receipt on an input trigger. The Input source can be selected
by PLIB_OC_SyncSourceSelect() routine.
Members
Members Description
OC_SYNC_SOURCE_NONE No synchronization and trigger input
OC_SYNC_SOURCE_OC1 Synchronization and trigger input is Output Compare1
OC_SYNC_SOURCE_OC2 Synchronization and trigger input is Output Compare2
OC_SYNC_SOURCE_OC3 Synchronization and trigger input is Output Compare3
OC_SYNC_SOURCE_OC4 Synchronization and trigger input is Output Compare4
OC_SYNC_SOURCE_OC5 Synchronization and trigger input is Output Compare5
OC_SYNC_SOURCE_OC6 Synchronization and trigger input is Output Compare6
OC_SYNC_SOURCE_OC7 Synchronization and trigger input is Output Compare7
OC_SYNC_SOURCE_OC8 Synchronization and trigger input is Output Compare8
OC_SYNC_SOURCE_OC9 Synchronization and trigger input is Output Compare9
OC_SYNC_SOURCE_PTG Synchronization and trigger input is Peripheral Trigger Generator Module
OC_SYNC_SOURCE_TMR1 Synchronization and trigger input is Timer1
OC_SYNC_SOURCE_TMR2 Synchronization and trigger input is Timer2
OC_SYNC_SOURCE_TMR3 Synchronization and trigger input is Timer3
OC_SYNC_SOURCE_TMR4 Synchronization and trigger input is Timer4
OC_SYNC_SOURCE_TMR5 Synchronization and trigger input is Timer5
OC_SYNC_SOURCE_IC1 Synchronization and trigger input is Input Capture1
OC_SYNC_SOURCE_IC2 Synchronization and trigger input is Input Capture2
OC_SYNC_SOURCE_IC3 Synchronization and trigger input is Input Capture3
OC_SYNC_SOURCE_IC4 Synchronization and trigger input is Input Capture4
OC_SYNC_SOURCE_IC5 Synchronization and trigger input is Input Capture5
OC_SYNC_SOURCE_IC6 Synchronization and trigger input is Input Capture6
OC_SYNC_SOURCE_IC7 Synchronization and trigger input is Input Capture7
OC_SYNC_SOURCE_IC8 Synchronization and trigger input is Input Capture8
OC_SYNC_SOURCE_CMP1 Trigger input is Comparator1. This input is not used for Synchronization
OC_SYNC_SOURCE_CMP2 Trigger input is Comparator2. This input is not used for Synchronization
OC_SYNC_SOURCE_CMP3 Trigger input is Comparator3. This input is not used for Synchronization
OC_SYNC_SOURCE_AD Trigger input is ADC. This input is not used for Synchronization
OC_SYNC_SOURCE_CTMU Trigger input is Charge Time Measurement Unit. This input is not used for
Synchronization
OC_SYNC_SOURCE_INT1 Synchronization and trigger input is External Interrupt1
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OC_SYNC_SOURCE_INT2 Synchronization and trigger input is External Interrupt2
5.6.13.5.6.12 OC_TRIGGER_STATUS_MODES Enumeration
C
typedef enum {
OC_TRIGGER_STATUS_MATCH,
OC_TRIGGER_STATUS_SOFTWARE
} OC_TRIGGER_STATUS_MODES;
Description
OC Trigger Status
This enumeration lists different trigger status reset modes. Trigger status can be reset in software or by a compare match
between timer value and pulse width value.
Members
Members Description
OC_TRIGGER_STATUS_MATCH Trigger status is cleared on compare match between timer value and pulse width
value
OC_TRIGGER_STATUS_SOFTWARE Trigger status is cleared in software
5.6.13.5.7 Feature Existence Functions
5.6.13.5.7.1 PLIB_OC_ExistsAlternateClock Function
C
bool PLIB_OC_ExistsAlternateClock(
OC_MODULE_ID index
);
Description
This function identifies whether the AlternateClock feature is available on the OC module. When this function returns true, these
functions are supported on the device:
• PLIB_OC_AlternateClockEnable
• PLIB_OC_AlternateClockDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlternateClock feature is supported on the device
• false - The AlternateClock feature is not supported on the device
Remarks
None.
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5.6.13.5.7.2 PLIB_OC_ExistsBufferSize Function
C
bool PLIB_OC_ExistsBufferSize(
OC_MODULE_ID index
);
Description
This function identifies whether the BufferSize feature is available on the OC module. When this function returns true, this
function is supported on the device:
• PLIB_OC_BufferSizeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the BufferSize feature is supported on the device
• false - If the BufferSize feature is not supported on the device
Remarks
None.
5.6.13.5.7.3 PLIB_OC_ExistsBufferValue Function
C
bool PLIB_OC_ExistsBufferValue(
OC_MODULE_ID index
);
Description
This function identifies whether the BufferValue feature is available on the OC module. When this function returns true, these
functions are supported on the device:
• PLIB_OC_Buffer32BitSet
• PLIB_OC_Buffer16BitSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the BufferValue feature is supported on the device
• false - If the BufferValue feature is not supported on the device
Remarks
None.
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5.6.13.5.7.4 PLIB_OC_ExistsCompareModeSelect Function
C
bool PLIB_OC_ExistsCompareModeSelect(
OC_MODULE_ID index
);
Description
This function identifies whether the CompareModeSelect feature is available on the OC module. When this function returns true,
this function is supported on the device:
• PLIB_OC_ModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the CompareModeSelect feature is supported on the device
• false - If the CompareModeSelect feature is not supported on the device
Remarks
None.
5.6.13.5.7.5 PLIB_OC_ExistsEnableControl Function
C
bool PLIB_OC_ExistsEnableControl(
OC_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the OC module. When this function returns true, these
functions are supported on the device:
• PLIB_OC_Enable
• PLIB_OC_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the EnableControl feature is supported on the device
• false - If the EnableControl feature is not supported on the device
Remarks
None.
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5.6.13.5.7.6 PLIB_OC_ExistsFaultInput Function
C
bool PLIB_OC_ExistsFaultInput(
OC_MODULE_ID index
);
Description
This function identifies whether the FaultInput feature is available on the OC module. When this function returns true, this
function is supported on the device:
• PLIB_OC_FaultInputSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the FaultInput feature is supported on the device
• false - If the FaultInput feature is not supported on the device
Remarks
None.
5.6.13.5.7.7 PLIB_OC_ExistsFaultModeSelect Function
C
bool PLIB_OC_ExistsFaultModeSelect(
OC_MODULE_ID index
);
Description
This function identifies whether the FaultModeSelect feature is available on the OC module. When this function returns true, this
function is supported on the device:
• PLIB_OC_FaultModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the FaultModeSelect feature is supported on the device
• false - If the FaultModeSelect feature is not supported on the device
Remarks
None.
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5.6.13.5.7.8 PLIB_OC_ExistsFaultOutSelect Function
C
bool PLIB_OC_ExistsFaultOutSelect(
OC_MODULE_ID index
);
Description
This function identifies whether the FaultOut feature is available on the OC module. When this function returns true, this function
is supported on the device:
• PLIB_OC_FaultOutSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the FaultOut feature is supported on the device
• false - If the FaultOut feature is not supported on the device
Remarks
None.
5.6.13.5.7.9 PLIB_OC_ExistsFaultStatus Function
C
bool PLIB_OC_ExistsFaultStatus(
OC_MODULE_ID index
);
Description
This function identifies whether the FaultStatus feature is available on the OC module. When this function returns true, this
function is supported on the device:
• PLIB_OC_FaultHasOccurred
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the FaultStatus feature is supported on the device
• false - If the FaultStatus feature is not supported on the device
Remarks
None.
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5.6.13.5.7.10 PLIB_OC_ExistsFaultTristateSelect Function
C
bool PLIB_OC_ExistsFaultTristateSelect(
OC_MODULE_ID index
);
Description
This function identifies whether the FaultTristateSelect feature is available on the OC module. When this function returns true,
this function is supported on the device:
• PLIB_OC_FaultTristateSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the FaultTristateSelect feature is supported on the device
• false - If the FaultTristateSelect feature is not supported on the device
Remarks
None.
5.6.13.5.7.11 PLIB_OC_ExistsPolarityInvert Function
C
bool PLIB_OC_ExistsPolarityInvert(
OC_MODULE_ID index
);
Description
This function identifies whether the PolarityInvert feature is available on the OC module. When this function returns true, these
functions are supported on the device:
• PLIB_OC_PolarityInvertedEnable
• PLIB_OC_PolarityInvertedDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PolarityInvert feature is supported on the device
• false - If the PolarityInvert feature is not supported on the device
Remarks
None.
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5.6.13.5.7.12 PLIB_OC_ExistsPulseWidth Function
C
bool PLIB_OC_ExistsPulseWidth(
OC_MODULE_ID index
);
Description
This function identifies whether the PulseWidth feature is available on the OC module. When this function returns true, these
functions are supported on the device:
• PLIB_OC_PulseWidth32BitSet
• PLIB_OC_PulseWidth16BitSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PulseWidth feature is supported on the device
• false - If the PulseWidth feature is not supported on the device
Remarks
None.
5.6.13.5.7.13 PLIB_OC_ExistsPWMDutyCycleResolutionControl Function
C
bool PLIB_OC_ExistsPWMDutyCycleResolutionControl(
OC_MODULE_ID index
);
Description
This function identifies whether the PWMDutyCycleResolution feature is available on the OC module. When this function returns
true, this function is supported on the device:
• PLIB_OC_PWMDutyCycleResolutionSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PWMDutyCycleResolution feature is supported on the device
• false - If the PWMDutyCycleResolution feature is not supported on the device
Remarks
None.
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5.6.13.5.7.14 PLIB_OC_ExistsStopInIdle Function
C
bool PLIB_OC_ExistsStopInIdle(
OC_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the OC module. When this function returns true, these
functions are supported on the device:
• PLIB_OC_StopInIdleEnable
• PLIB_OC_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the StopInIdle feature is supported on the device
• false - If the StopInIdle feature is not supported on the device
Remarks
None.
5.6.13.5.7.15 PLIB_OC_ExistsSyncModeSelect Function
C
bool PLIB_OC_ExistsSyncModeSelect(
OC_MODULE_ID index
);
Description
This function identifies whether the SyncModeSelect feature is available on the OC module. When this function returns true, this
function is supported on the device:
• PLIB_OC_SyncModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SyncModeSelect feature is supported on the device
• false - If the SyncModeSelect feature is not supported on the device
Remarks
None.
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5.6.13.5.7.16 PLIB_OC_ExistsSyncSourceSelect Function
C
bool PLIB_OC_ExistsSyncSourceSelect(
OC_MODULE_ID index
);
Description
This function identifies whether the SyncSourceSelect feature is available on the OC module. When this function returns true,
this function is supported on the device:
• PLIB_OC_SyncSourceSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SyncSourceSelect feature is supported on the device
• false - If the SyncSourceSelect feature is not supported on the device
Remarks
None.
5.6.13.5.7.17 PLIB_OC_ExistsTimerSelect Function
C
bool PLIB_OC_ExistsTimerSelect(
OC_MODULE_ID index
);
Description
This function identifies whether the TimerSelect feature is available on the OC module. When this function returns true, this
function is supported on the device:
• PLIB_OC_TimerSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the TimerSelect feature is supported on the device
• false - If the TimerSelect feature is not supported on the device
Remarks
None.
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5.6.13.5.7.18 PLIB_OC_ExistsTimerTriggered Function
C
bool PLIB_OC_ExistsTimerTriggered(
OC_MODULE_ID index
);
Description
This function identifies whether the TimerTriggered feature is available on the OC module. When this function returns true, this
function is supported on the device:
• PLIB_OC_IsTriggered
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the TimerTriggered feature is supported on the device
• false - If the TimerTriggered feature is not supported on the device
Remarks
None.
5.6.13.5.7.19 PLIB_OC_ExistsTriggerControl Function
C
bool PLIB_OC_ExistsTriggerControl(
OC_MODULE_ID index
);
Description
This function identifies whether the TriggerControl feature is available on the OC module. When this function returns true, this
function is supported on the device:
• PLIB_OC_TriggerSet
• PLIB_OC_TriggerClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the TriggerControl feature is supported on the device
• false - If the TriggerControl feature is not supported on the device
Remarks
None.
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5.6.13.5.7.20 PLIB_OC_ExistsTriggerStatusModeSelect Function
C
bool PLIB_OC_ExistsTriggerStatusModeSelect(
OC_MODULE_ID index
);
Description
This function identifies whether the TriggerStatusModeSelect feature is available on the OC module. When this function returns
true, this function is supported on the device:
• PLIB_OC_TriggerStatusModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the TriggerStatusModeSelect feature is supported on the device
• false - If the TriggerStatusModeSelect feature is not supported on the device
Remarks
None.
5.6.13.6 Files
Files
Name Description
plib_oc.h This file contains the interface definition for the Output Compare (OC) peripheral
library.
Description
5.6.13.6.1 plib_oc.h
Output Compare Module Peripheral Library Interface Header
This library provides a low-level abstraction of the Output Compare module on Microchip microcontrollers with a convenient C
language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the
module's registers, thus hiding differences between one microcontroller variant and another.
Functions
Name Description
PLIB_OC_AlternateClockDisable Selects Timer 2/3.instead of the alternate clock source.
PLIB_OC_AlternateClockEnable Selects the alternate clock source.
PLIB_OC_Buffer16BitSet Sets a 16-bit primary compare value for compare operations.
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PLIB_OC_Buffer32BitSet Sets a 32-bit primary compare value for compare operations.
PLIB_OC_BufferSizeSelect Sets the buffer size and pulse width to 16-bits or 32-bits.
PLIB_OC_Disable Disable the OC module
PLIB_OC_Enable Enables the OC module.
PLIB_OC_ExistsAlternateClock Identifies whether the AlternateClock feature exists on the OC
module
PLIB_OC_ExistsBufferSize Identifies whether the BufferSize feature exists on the OC
module.
PLIB_OC_ExistsBufferValue Identifies whether the BufferValue feature exists on the OC
module.
PLIB_OC_ExistsCompareModeSelect Identifies whether the CompareModeSelect feature exists on
the OC module.
PLIB_OC_ExistsEnableControl Identifies whether the EnableControl feature exists on the OC
module.
PLIB_OC_ExistsFaultInput Identifies whether the FaultInput feature exists on the OC
module.
PLIB_OC_ExistsFaultModeSelect Identifies whether the FaultModeSelect feature exists on the
OC module.
PLIB_OC_ExistsFaultOutSelect Identifies whether the FaultOut feature exists on the OC
module.
PLIB_OC_ExistsFaultStatus Identifies whether the FaultStatus feature exists on the OC
module.
PLIB_OC_ExistsFaultTristateSelect Identifies whether the FaultTristateSelect feature exists on the
OC module.
PLIB_OC_ExistsPolarityInvert Identifies whether the PolarityInvert feature exists on the OC
module.
PLIB_OC_ExistsPulseWidth Identifies whether the PulseWidth feature exists on the OC
module.
PLIB_OC_ExistsPWMDutyCycleResolutionControl Identifies whether the PWMDutyCycleResolution feature exists
on the OC module.
PLIB_OC_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the OC
module.
PLIB_OC_ExistsSyncModeSelect Identifies whether the SyncModeSelect feature exists on the
OC module.
PLIB_OC_ExistsSyncSourceSelect Identifies whether the SyncSourceSelect feature exists on the
OC module.
PLIB_OC_ExistsTimerSelect Identifies whether the TimerSelect feature exists on the OC
module.
PLIB_OC_ExistsTimerTriggered Identifies whether the TimerTriggered feature exists on the OC
module.
PLIB_OC_ExistsTriggerControl Identifies whether the TriggerControl feature exists on the OC
module.
PLIB_OC_ExistsTriggerStatusModeSelect Identifies whether the TriggerStatusModeSelect feature exists
on the OC module.
PLIB_OC_FaultHasOccurred Checks if a PWM fault has occurred.
PLIB_OC_FaultInputSelect Selects a Fault input for the OC module.
PLIB_OC_FaultModeSelect Selects an automatic or software-based mode to clear the
Fault.
PLIB_OC_FaultOutSelect OC output pin is driven to a known state on a Fault.
PLIB_OC_FaultTristateSelect The OC module output can be tristated or driven to a known
state when a Fault occurs.
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PLIB_OC_IsTriggered Checks whether or not a timer source has been triggered.
PLIB_OC_ModeSelect Selects the compare mode for the OC module.
PLIB_OC_PolarityInvertedDisable Disables OC module output inversion polarity.
PLIB_OC_PolarityInvertedEnable Output compare polarity is inverted.
PLIB_OC_PulseWidth16BitSet Sets a 16-bit pulse width for OC module output.
PLIB_OC_PulseWidth32BitSet Sets a 32-bit pulse width for OC module output.
PLIB_OC_PWMDutyCycleResolutionSet Sets the PWM duty cycle resolution and delays the falling edge
of OC output in compare modes.
PLIB_OC_StopInIdleDisable OC module continues operating when the device enters Idle
mode
PLIB_OC_StopInIdleEnable Discontinues OC module operation when the device enters Idle
mode
PLIB_OC_SyncModeSelect Selects the synchronization mode for the OC module.
PLIB_OC_SyncSourceSelect Selects the input source for synchronous or asynchronous
(triggered) operation of the OC module.
PLIB_OC_TimerSelect Selects a clock source for the OC module.
PLIB_OC_TriggerClear Clears the trigger status for the OC module.
PLIB_OC_TriggerSet Sets the trigger status for the OC module.
PLIB_OC_TriggerStatusModeSelect Selects the trigger status reset mode.
File Name
plib_oc.h
Company
Microchip Technology Inc.
5.6.14 Oscillator Peripheral Library
5.6.14.1 Introduction
Oscillator Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Oscillator module on Microchip microcontrollers with a convenient C language
interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the module's
registers, thereby hiding differences from one microcontroller variant to another.
Description
Oscillator Overview
The Oscillator is the heart of the microcontroller and provides the clock on which the core and the peripherals run.
For all of the oscillators present on a Microchip microcontroller, two kinds of configurations exist:
• Through Configuration bits
• At execution time
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The first is through 'Configuration bits', which is a one-time configuration done during the programming of the device. These
one-time configurations are programmed in the code memory.
The other is 'Execution time' configuration, which deals with features that are allowed to be changed during run-time. This
peripheral library provides functions which deal only with the 'execution time' configurable features of the Oscillator module.
Certain Oscillator module features can only be selected through 'Configuration bits'. However, most of the features can be
altered during run-time by using the functions provided in this library.
5.6.14.2 Release Notes
MPLAB Harmony Version: v0.70b Oscillator Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.14.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.14.4 Using the Library
Using the Library
This topic describes the basic architecture of the Oscillator Peripheral Library and provides information and examples on its use.
Interface Header File: plib_osc.h
The interface to the Oscillator Peripheral Library is defined in the "plib_osc.h" header file, which is included by the "peripheral.h"
peripheral library header file. Any C language source (.c) file that uses the Oscillator Peripheral Library must include
"peripheral.h".
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5.6.14.4.1 Hardware Abstraction Model
This library provides a low-level abstraction of the Oscillator module on Microchip microcontrollers with a convenient C language
interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
Description
Hardware Abstraction Model
The Oscillator hardware model is shown in the following figure. The blocks represented in dashed lines may not be present in all
microcontrollers. Refer to the "Oscillator" chapter in the specific device data sheet to determine availability.
To understand the Oscillator module and how each feature is mapped in this library, it is important to understand the following
terminology.
Clock Source
A clock source is hardware that generates oscillations, which may be internal or external.
Divisor and Multiplier/PLL
These are hardware modules that can scale the clock. The rate at which the scaling is done may be fixed or configurable.
Clock Outputs
Clock outputs means output lines from the Oscillator module, which may route to different modules of the device or to the CPU
(i.e., the system clock).
The following diagram provides a simplified explanation and the relationship between the previously mentioned terms. In most
cases, there are multiple clock source options available for each of the clock outputs. However, not all the clock sources are
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available for all the output clocks. Scaling is an optional feature in most of the cases.
5.6.14.4.2 Library Usage Model
The usage model for the Oscillator Peripheral Library is described in this section.
Description
The following diagram shows the major components of the usage model:
Each of the blocks in the diagram above correspond to the library interface section.
Library Interface Section Description
5.6.14.4.3 How the Library Works
The library can be used to control the Oscillator module. The usage model is explained in this section.
5.6.14.4.3.1 Oscillator Selection and Switching
Note: The device Configuration options change with the microcontroller family. Refer to the "Oscillator" chapter in the specific
device data sheet for possible device configurations.
On devices that allow it, the oscillator selection can be overridden at run-time using the Oscillator Peripheral Library, as shown in
the following code example:
//Do the configuration bit settings
OSC_SYS_TYPE currOsc;
OSC_SYS_TYPE newOsc=OSC_PRIMARY;
//get the current oscillator
currOsc = PLIB_OSC_CurrentSysClockGet(OSC_ID_0);
//check if the current oscillator is same as new oscillator
if(currOsc != newOsc)
{
//set the new oscillator request to Fast RC oscillator
PLIB_OSC_SysClockSelect ( OSC_ID_0, newOsc );
}
Example: Oscillator Selection Change During Run-time
In the event the clock switch did not complete, the clock switch logic can be reset by calling the following API:
bool oscSwitch_st;
oscSwitch_st = PLIB_OSC_ClockSwitchingIsComplete(OSC_ID_0);
if(!oscSwitch_st)
{
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PLIB_OSC_ClockSwitchingAbort(OSC_ID_0);
}
Note: This function takes care of the register unlock, which is required as per the device data sheet. Therefore, the user does
not need to explicitly perform the unlock sequence.
Example: Oscillator Switch Abort
This will abandon the clock switch process, stop and reset the oscillator start-up timer (if applicable), and stop the PLL (if
applicable). The clock switch process can be aborted at any time. A clock switch that is already in progress can also be aborted
by performing a second clock switch.
5.6.14.4.3.2 Clock Sources
This section explains the available clock sources and their setup.
The following clock sources are available in Microchip microcontrollers:
• Primary Oscillator (Posc)
• Secondary Oscillator (Sosc)
• Internal Fast RC (FRC) Oscillator
• Internal Low-Power RC (LPRC) Oscillator
Primary Oscillator (Posc)
The Primary Oscillator has several operating modes (refer to the "Oscillator" chapter in the specific device data sheet for exact
operating modes). The selection of the operating mode is done using the device Configuration registers during device
programming. During run-time this can be changed using the oscillator switch option. However, changing the operating mode
from High Gain (HC) to External Clock (EC) or External Resonator(XT) is not possible.
If a PLL is available, the PLL input divider can only be programmed during device programming. However, the PLL output divider
and the PLL multiplier can be changed during run-time using the PLL functions described in the PLL section.
Secondary Oscillator (Sosc)
The optional Secondary Oscillator is designed specifically for low-power operation with an external crystal. The Secondary
Oscillator is enabled in hardware by the device Configuration bits. Once it is enabled in hardware, it can be switched on during
software run-time.
bool oscSecondary_st;
oscSecondary_st = PLIB_OSC_SecondaryIsEnabled(OSC_ID_0);
if(oscSecondary_st)
{
PLIB_OSC_SecondaryEnable(OSC_ID_0);
}
//Do something
PLIB_OSC_SecondaryDisable(OSC_ID_0);
Internal Fast RC (FRC) Oscillator
The FRC Oscillator is a fast user-trimmable internal RC oscillator with a user-selectable input divider, PLL multiplier, and output
divider. See the "Oscillator" chapter in the specific device data sheet for more information on the FRC oscillator.
Once the FRC oscillator is selected using the device Configuration registers or an oscillator switch is initiated selecting the FRC
as a new oscillator, the FRC Oscillator PLL divider can be changed during run-time.
OSC_FRC_DIV FRCDivisor;
//Get the current divider value for FRC
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FRCDivisor = PLIB_OSC_FRCDivisorGet(OSC_ID_0);
if(FRCDivisor != OSC_FRC_DIV_4)
{
PLIB_OSC_FRCDivisorSelect ( OSC_ID_0, OSC_FRC_DIV_4 );
}
Internal Low-Power RC (LPRC) Oscillator
The LPRC Oscillator is separate from the FRC Oscillator. It oscillates at a nominal frequency of 31.25 kHz (this value is
device-dependent). The LPRC Oscillator can act as the clock source for the Power-up Timer (PWRT), Watchdog Timer (WDT),
Fail-Safe Clock Monitor (FSCM), and PLL reference circuits. It can also be used to provide a low-frequency clock source option
for the device in those applications where power consumption is critical and timing accuracy is not required.
The LPRC remains enabled after power on in the following conditions:
• Fail-safe clock monitoring is enabled
• Watchdog Timer is enabled
• LPRC is selected as the system clock
PLL Configuration
OSC_SYSPLL_OUT_DIV PLLOutDiv;
OSC_SYSPLL_MULTIPLIER pll_multiply;
pll_multiply = PLIB_OSC_SysPLLMultiplierGet(OSC_ID_0);
if(pll_multiply != 15)
{
PLIB_OSC_SysPLLMultiplierSelect(OSC_ID_0, 15);
}
PLLOutDiv = PLIB_OSC_SysPLLOutputDivisorGet(OSC_ID_0);
if(PLLOutDiv != OSC_SYSPLL_OUT_DIV_8)
{
PLIB_OSC_SysPLLOutputDivisorSelect(OSC_ID_0, OSC_SYSPLL_OUT_DIV_8);
}
5.6.14.4.3.3 Fail-Safe Clock Monitor
Fail-Safe Clock Monitor (FSCM)
The Fail-Safe Clock Monitor (FSCM) is designed to allow continued device operation if the current oscillator fails. It is intended
for use with the Primary Oscillator (Posc) and automatically switches to the FRC oscillator if a Posc failure is detected. The
switch to the FRC oscillator allows continued device operation and the ability to retry the Posc or to execute the appropriate for a
clock failure.
The FSCM can be enabled in the device configuration during the programming of the device. During run-time, the clock failure
status can be obtained as follows:
bool clockFail;
//Returns true if clock failure is detected.
clockFail = PLIB_OSC_ClockHasFailed(OSC_ID_0);
5.6.14.4.3.4 Internal FRC Oscillator Tuning
Tuning the Oscillator
Oscillator tuning will help compensate for temperature effects on the FRC frequency over a wide range of temperatures. The
tuning step size is an approximation, the application is supposed to try different values to achieve the best result. In some of the
devices there are different tuning modes available.
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Direct Number Method
FRC tuning is based on the number specified by the PLIB_OSC_FRCTuningSelect function.
PLIB_OSC_FRCTuningModeSet(OSC_ID_0, OSC_TUNING_USING_NUMBER);
PLIB_OSC_FRCTuningSelect(OSC_ID_0, 0x11);
Sequential Dithering
To get the sequential dithering working, the client needs to set eight sequencer values. Value 0 is set using the
PLIB_OSC_FRCTuningSelect function. The other seven values (values 1 through 7) are set using the
PLIB_OSC_FRCTuningSequenceValueSet function.
PLIB_OSC_FRCTuningModeSet(OSC_ID_0, OSC_TUNING_SEQ_DITHER);
PLIB_OSC_FRCTuningSelect(OSC_ID_0, 0x11);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_1,
OSC_FRC_TUNE_MINUS_2_25_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_2,
OSC_FRC_TUNE_MINUS_1_5_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_3,
OSC_FRC_TUNE_MINUS_0_375_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_4,
OSC_FRC_TUNE_PLUS_0_43_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_5,
OSC_FRC_TUNE_PLUS_1_29_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_6,
OSC_FRC_TUNE_PLUS_2_54_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_7,
OSC_FRC_TUNE_MINUS_3_PERCENT);
//Configure PWM (period, pulse width and turn on the module)
Pseudo-Random Number
Select the tuning mode. Then, configure the PWM module and set the period and pulse width. The Oscillator system generates a
4-bit number based on a pseudo-random number generation algorithm. It then uses this value to tune the FRC oscillator. The
module will generate different frequencies corresponding to the generated pseudo-random numbers every eighth PWM cycle.
PLIB_OSC_FRCTuningModeSet(OSC_ID_0, OSC_TUNING_PSEUDO_RANDOM);
//15 bit Linear Feedback shift register value
PLIB_OSC_LinearFeedbackShiftRegSet(OSC_ID_0, 0x7FFF);
//Configure PWM (period, pulse width and turn on the module)
Note: This function takes care of the register unlock, which is required as per the device data sheet. Therefore, the user does
not need to explicitly perform the unlock sequence.
5.6.14.5 Configuring the Library
The library is configured for the supported oscillator modules when the processor is chosen in the MPLAB IDE.
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5.6.14.6 Library Interface
Data Types and Constants
Name Description
OSC_PB_CLOCK_DIV_TYPE Type of the oscillator PB Clock divisor value.
OSC_REF_DIVISOR_TYPE Reference oscillator divisor type.
OSC_REFERENCE_MAX_DIV Defines the reference clock output divisor maximum value.
OSC_SYSPLL_MULTIPLIER_TYPE Type of the oscillator system PLL multiplier value.
OSC_AUX_CLOCK_SOURCE Lists the possible Auxiliary PLL input divider values.
OSC_AUX_MODE Lists the possible Auxiliary Oscillator mode values.
OSC_AUXPLL_IN_DIV Lists the possible Auxiliary PLL input divider values.
OSC_AUXPLL_MULTIPLIER Lists the possible Auxiliary PLL multiplier
OSC_AUXPLL_OUT_DIV Lists the possible Auxiliary PLL output divider values.
OSC_DOZE_RATIO Lists the possible doze values.
OSC_FRC_DIV Lists the possible Fast RC (FRC) Oscillator divider values.
OSC_FRC_TUNE Lists the oscillator tuning values.
OSC_GFX_CLOCK Lists the possible Graphics (display) module clock values.
OSC_LFSR_TYPE Lists the possible Auxiliary PLL input divider values.
OSC_MODULE_ID Possible instances of the OSC module.
OSC_OPERATION_ON_WAIT Lists the possible status on a WAIT instruction.
OSC_PERIPHERAL_BUS Lists the possible Peripheral buses
OSC_PLL_SELECT Lists the PLLs in the Oscillator module.
OSC_PLLAUX_CLOCK_SOURCE Lists the possible Auxiliary PLL clock source.
OSC_REF_BASECLOCK Lists the possible base clock values for the reference oscillator.
OSC_REF_DIV Lists the possible reference oscillator divisor values.
OSC_REFERENCE Lists the possible reference oscillator
OSC_SYS_CLOCK_DIV Lists the possible system clock divisor bits.
OSC_SYS_TYPE Lists the possible oscillator type values.
OSC_SYSPLL_FREQ_RANGE Lists the possible PLL frequency range
OSC_SYSPLL_IN_CLK_SOURCE Lists the possible input clock source for PLL module
OSC_SYSPLL_IN_DIV Lists the possible PLL input divider values.
OSC_SYSPLL_OUT_DIV Lists the possible PLL output divider values.
OSC_TUNING_MODE Lists the oscillator tuning modes.
OSC_TUNING_SEQUENCERS Lists the oscillator sequencer entries.
OSC_USBCLOCK_SOURCE Lists the possible USB clock sources.
Auxiliary Oscillator Setup Functions
Name Description
PLIB_OSC_AuxClockSourceGet Gets the clock source for the auxiliary clock.
PLIB_OSC_AuxClockSourceSet Sets the clock source for the auxiliary clock divisor.
PLIB_OSC_AuxModeGet Gets the selected Auxiliary Oscillator mode.
PLIB_OSC_AuxModeSelect Selects the Auxiliary Oscillator mode.
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Clock Fail Monitoring Functions
Name Description
PLIB_OSC_ClockHasFailed Returns 'true' if the clock fails.
Doze Setup Functions
Name Description
PLIB_OSC_DozeModeDisable Disables Doze mode.
PLIB_OSC_DozeModeEnable Enables Doze mode.
PLIB_OSC_DozeRatioGet Gets the ratio of the processor clock to the peripheral clock.
PLIB_OSC_DozeRatioSelect Selects the Doze ratio of the processor clock to the peripheral
clock.
PLIB_OSC_DozeRecoverOnInterruptDisable Disables the recovery from Doze mode upon an interrupt.
PLIB_OSC_DozeRecoverOnInterruptEnable Enables recovery from Doze mode upon an interrupt.
PLIB_OSC_DozeRecoverOnInterruptIsEnabled Returns 'true' if recover from Doze mode on interrupt is enabled.
Fast RC Oscillator Setup Functions
Name Description
PLIB_OSC_FRCDitherEnable Enables the FRC Oscillator clock dithering.
PLIB_OSC_FRCDivisorGet Gets the FRC clock divisor.
PLIB_OSC_FRCDivisorSelect Sets the FRC clock divisor to the specified value.
PLIB_OSC_FRCTuningModeGet Gets the FRC oscillator tuning mode.
PLIB_OSC_FRCTuningModeSet Selects the FRC oscillator tuning mode.
PLIB_OSC_FRCTuningSelect Sets the FRC tuning value.
PLIB_OSC_FRCTuningSequenceValueGet Gets the value set in the FRC tune sequencer.
PLIB_OSC_FRCTuningSequenceValueSet Sets the value in the FRC tune sequencer.
PLIB_OSC_LinearFeedbackShiftRegGet Gets the value from linear feedback shift register.
PLIB_OSC_LinearFeedbackShiftRegSet Sets the linear feedback shift register.
Feature Existence Functions
Name Description
PLIB_OSC_ExistsClockFail Identifies whether the ClockFail feature exists on the OSC
module
PLIB_OSC_ExistsFRCDivisor Identifies whether the FRCDivisor feature exists on the OSC
module
PLIB_OSC_ExistsFRCTuning Identifies whether the FRCTuning feature exists on the OSC
module
PLIB_OSC_ExistsOnWaitAction Identifies whether the OnWaitAction feature exists on the OSC
module
PLIB_OSC_ExistsOscCurrentGet Identifies whether the OscCurrentGet feature exists on the OSC
module
PLIB_OSC_ExistsOscSelect Identifies whether the OscSelect feature exists on the OSC
module
PLIB_OSC_ExistsOscSwitchInit Identifies whether the OscSwitchInit feature exists on the OSC
module
PLIB_OSC_ExistsPBClockDivisor Identifies whether the PBClockDivisor feature exists on the
OSC module
PLIB_OSC_ExistsPBClockOutputEnable Identifies whether the PBClockOutputEnable feature exists on
the OSC module
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PLIB_OSC_ExistsPBClockReady Identifies whether the PBClockReady feature exists on the OSC
module
PLIB_OSC_ExistsPLLClockLock Identifies whether the PLLClockLock feature exists on the OSC
module
PLIB_OSC_ExistsPLLLockStatus Identifies whether the PLLLockStatus feature exists on the OSC
module
PLIB_OSC_ExistsReferenceOscBaseClock Identifies whether the ReferenceOscBaseClock feature exists
on the OSC module
PLIB_OSC_ExistsReferenceOscChange Identifies whether the ReferenceOscChange feature exists on
the OSC module
PLIB_OSC_ExistsReferenceOscChangeActive Identifies whether the ReferenceOscChangeActive feature
exists on the OSC module
PLIB_OSC_ExistsReferenceOscDivisor Identifies whether the ReferenceOscDivisor feature exists on
the OSC module
PLIB_OSC_ExistsReferenceOscEnable Identifies whether the ReferenceOscEnable feature exists on
the OSC module
PLIB_OSC_ExistsReferenceOscStopInIdleEnable Identifies whether the ReferenceOscStopInIdleEnable feature
exists on the OSC module
PLIB_OSC_ExistsReferenceOscStopInSleep Identifies whether the ReferenceOscStopInSleep feature exists
on the OSC module
PLIB_OSC_ExistsReferenceOscTrim Identifies whether the ReferenceOscTrim feature exists on the
OSC module
PLIB_OSC_ExistsReferenceOutputEnable Identifies whether the ReferenceOutputEnable feature exists on
the OSC module
PLIB_OSC_ExistsSecondaryEnable Identifies whether the SecondaryEnable feature exists on the
OSC module
PLIB_OSC_ExistsSecondaryReady Identifies whether the SecondaryReady feature exists on the
OSC module
PLIB_OSC_ExistsSysPLLFrequencyRange Identifies whether the PLLFrequencyRange feature exists on
the OSC module
PLIB_OSC_ExistsSysPLLInputClockSource Identifies whether the PLLInputClockSource feature exists on
the OSC module
PLIB_OSC_ExistsSysPLLInputDivisor Identifies whether the PLLInputDivisor feature exists on the
OSC module
PLIB_OSC_ExistsSysPLLMultiplier Identifies whether the PLLMultiplier feature exists on the OSC
module
PLIB_OSC_ExistsSysPLLOutputDivisor Identifies whether the PLLOutputDivisor feature exists on the
OSC module
PLIB_OSC_ExistsUsbClockSource Identifies whether the UsbClockSource feature exists on the
OSC module
General Setup Functions
Name Description
PLIB_OSC_OnWaitActionGet Gets the configured operation to be performed when a WAIT instruction is
executed.
PLIB_OSC_OnWaitActionSet Selects the operation to be performed when a WAIT instruction is executed.
PLIB_OSC_StartupTimerHasExpired Returns 'true' if the oscillator start-up time-out timer has expired.
Oscillator Switch Setup Functions
Name Description
PLIB_OSC_ClockSwitchingAbort Aborts an oscillator switch.
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PLIB_OSC_ClockSwitchingIsComplete Gets the oscillator switch progress status.
PLIB_OSC_CurrentSysClockGet Gets the current oscillator selected.
PLIB_OSC_SysClockSelect Selects the new oscillator.
Peripheral Clock Setup Functions
Name Description
PLIB_OSC_PBClockDivisorGet Gets the peripheral bus clock divisor.
PLIB_OSC_PBClockDivisorIsReady Checks whether the peripheral bus clock divisor is ready to be written.
PLIB_OSC_PBClockDivisorSet Sets the peripheral bus clock divisor to the specified value.
PLIB_OSC_PBOutputClockDisable Disables the peripheral bus output clock
PLIB_OSC_PBOutputClockEnable Enables the peripheral bus output clock
PLIB_OSC_PBOutputClockIsEnabled Checks whether the peripheral bus clock output is enabled or not
PLL Setup Functions
Name Description
PLIB_OSC_PLLAuxClockSourceGet Returns the clock source selected for the Auxiliary PLL.
PLIB_OSC_PLLAuxClockSourceSelect Sets the Auxiliary PLL clock source.
PLIB_OSC_PLLAuxInputDivisorGet Gets the input divisor for the Auxiliary PLL.
PLIB_OSC_PLLAuxInputDivisorSelect Sets the input divisor for the Auxiliary PLL to the specified value.
PLIB_OSC_PLLAuxIsLocked Returns whether the Auxiliary PLL is locked.
PLIB_OSC_PLLAuxMultiplierGet Gets the Auxiliary PLL multiplier.
PLIB_OSC_PLLAuxMultiplierSelect Sets the Auxiliary PLL multiplier to the specified value.
PLIB_OSC_PLLAuxOutputDivisorGet Gets the output divisor for the Auxiliary PLL.
PLIB_OSC_PLLAuxOutputDivisorSet Sets the output divisor for the Auxiliary PLL to the specified value.
PLIB_OSC_PLLClockIsLocked Gets the lock status for the clock and PLL selections.
PLIB_OSC_PLLClockLock Locks the clock and PLL selections.
PLIB_OSC_PLLClockUnlock Unlocks the clock and PLL selections.
PLIB_OSC_PLLDisable Disables the specified PLL.
PLIB_OSC_PLLEnable Enables the specified PLL.
PLIB_OSC_PLLIsEnabled Returns 'true' if the specified PLL is enabled.
PLIB_OSC_PLLIsLocked Returns 'true' if the selected PLL is locked.
PLIB_OSC_SysPLLFrequencyRangeGet Returns the frequence range for PLL
PLIB_OSC_SysPLLFrequencyRangeSet Sets the frequence range for PLL
PLIB_OSC_SysPLLInputClockSourceGet Returns the input clock source for the PLL module
PLIB_OSC_SysPLLInputClockSourceSet Sets the input clock source for the PLL module
PLIB_OSC_SysPLLInputDivisorGet Gets the input divisor for the PLL.
PLIB_OSC_SysPLLInputDivisorSet Sets the input divider for the PLL to the specified value.
PLIB_OSC_SysPLLMultiplierGet Gets the PLL multiplier.
PLIB_OSC_SysPLLMultiplierSelect Sets the PLL multiplier to the specified value.
PLIB_OSC_SysPLLOutputDivisorGet Gets the output divisor for the PLL.
PLIB_OSC_SysPLLOutputDivisorSet Sets the output divider for the PLL to the specified value.
Primary Oscillator Setup Functions
Name Description
PLIB_OSC_PrimaryOscInSleepModeDisable The Primary Oscillator is disabled during Sleep mode.
PLIB_OSC_PrimaryOscInSleepModeEnable The Primary Oscillator continues to operate during Sleep mode.
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PLIB_OSC_PrimaryOscInSleepModeIsEnabled Returns 'true' if the Primary Oscillator is disabled during Sleep
mode.
Reference Oscillator Setup Functions
Name Description
PLIB_OSC_ReferenceOscBaseClockSelect Sets the base clock for the reference oscillator.
PLIB_OSC_ReferenceOscDisable Disables the reference oscillator output.
PLIB_OSC_ReferenceOscDivisorValueSet Selects the reference oscillator divisor value.
PLIB_OSC_ReferenceOscEnable Enables the reference oscillator.
PLIB_OSC_ReferenceOscIsEnabled Gets the enable status of the reference oscillator output.
PLIB_OSC_ReferenceOscSourceChangeIsActive Returns 'true' if a reference oscillator source change request is
active.
PLIB_OSC_ReferenceOscStopInIdleDisable Enables the reference oscillator in Idle mode.
PLIB_OSC_ReferenceOscStopInIdleEnable Configures the reference oscillator to stop operating in Idle
mode.
PLIB_OSC_ReferenceOscStopInIdleIsEnabled Returns 'true' if the reference oscillator is disabled in Idle mode.
PLIB_OSC_ReferenceOscStopInSleepDisable Enables the reference oscillator in Sleep mode.
PLIB_OSC_ReferenceOscStopInSleepEnable Configures the reference oscillator to stop operating in Sleep
mode.
PLIB_OSC_ReferenceOscStopInSleepIsEnabled Returns 'true' if the reference oscillator is disabled in Sleep
mode.
PLIB_OSC_ReferenceOscSwitchIsComplete Returns 'true' if the reference oscillator base clock switching is
complete.
PLIB_OSC_ReferenceOscTrimSet Sets the reference oscillator divisor trim value.
PLIB_OSC_ReferenceOutputDisable Disables the reference oscillator output.
PLIB_OSC_ReferenceOutputEnable Enables the reference oscillator output.
PLIB_OSC_ReferenceOutputIsEnabled Returns 'true' if the reference oscillator output is enabled.
Secondary Oscillator Setup Functions
Name Description
PLIB_OSC_SecondaryDisable Disables the Secondary Oscillator.
PLIB_OSC_SecondaryEnable Enables the Secondary Oscillator.
PLIB_OSC_SecondaryIsEnabled Returns 'true' if the Secondary Oscillator is enabled.
PLIB_OSC_SecondaryIsReady Returns 'true' if the Secondary Oscillator is ready.
USB and Display Clock Setup Functions
Name Description
PLIB_OSC_GraphicsClockDivisorGet Gets the Graphics module clock divisor.
PLIB_OSC_GraphicsClockDivisorSet Sets the Graphics module clock divisor.
PLIB_OSC_GraphicsClockSourceGet Gets the Graphics Controller module clock frequency value.
PLIB_OSC_GraphicsClockSourceSelect Sets the Graphics Controller module clock.
PLIB_OSC_UsbClockSourceGet Gets the USB module clock source.
PLIB_OSC_UsbClockSourceSelect Sets the USB module clock source.
Description
This section lists and describes the functions, data types, and constants provided in the Oscillator Peripheral Library.
5.6.14.6.1 General Setup Functions
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5.6.14.6.1.1 PLIB_OSC_OnWaitActionGet Function
C
OSC_OPERATION_ON_WAIT PLIB_OSC_OnWaitActionGet(
OSC_MODULE_ID index
);
Description
This function gets the configured operation that is to be performed when a WAIT instruction is executed.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
On a WAIT action, one of the possible values of OSC_OPERATION_ON_WAIT.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsOnWaitAction in your application to determine whether this feature is available.
Example
if (PLIB_OSC_OnWaitActionGet(OSC_ID_0) == OSC_ON_WAIT_SLEEP)
{
//Do some action
}
5.6.14.6.1.2 PLIB_OSC_OnWaitActionSet Function
C
void PLIB_OSC_OnWaitActionSet(
OSC_MODULE_ID index,
OSC_OPERATION_ON_WAIT onWait
);
Description
This function selects the operation to be performed when a WAIT instruction is executed.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
onWait Operation to be performed when a WAIT instruction is executed. One of the
possible values of OSC_OPERATION_ON_WAIT.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_OSC_ExistsOnWaitAction in your application to determine whether this feature is available.
If this API is not called, the device will enter Idle mode on execution of a WAIT instruction.
Example
PLIB_OSC_OnWaitActionSet(OSC_ID_0, OSC_ON_WAIT_SLEEP);
5.6.14.6.1.3 PLIB_OSC_StartupTimerHasExpired Function
C
bool PLIB_OSC_StartupTimerHasExpired(
OSC_MODULE_ID index
);
Description
This function returns 'true' if the oscillator start-up time-out timer has expired.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
• true - Oscillator start-up time-out timer has expired
• false - Oscillator start-up time-out timer is running
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
bool startUpTImer;
startUpTImer = PLIB_OSC_StartupTimerHasExpired(OSC_ID_0);
5.6.14.6.2 Primary Oscillator Setup Functions
5.6.14.6.2.1 PLIB_OSC_PrimaryOscInSleepModeDisable Function
C
void PLIB_OSC_PrimaryOscInSleepModeDisable(
OSC_MODULE_ID index
);
Description
This function disables the Primary Oscillator during Sleep mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_PrimaryOscInSleepModeDisable(OSC_ID_0);
5.6.14.6.2.2 PLIB_OSC_PrimaryOscInSleepModeEnable Function
C
void PLIB_OSC_PrimaryOscInSleepModeEnable(
OSC_MODULE_ID index
);
Description
This function enables the Primary Oscillator during Sleep mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_PrimaryOscInSleepModeEnable(OSC_ID_0);
5.6.14.6.2.3 PLIB_OSC_PrimaryOscInSleepModeIsEnabled Function
C
bool PLIB_OSC_PrimaryOscInSleepModeIsEnabled(
OSC_MODULE_ID index
);
Description
This function gets the enable status of the Primary Oscillator during Sleep mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
• true - Primary Oscillator is enabled during Sleep mode
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• false - Primary Oscillator is disabled during Sleep mode
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
bool priOscStatus;
priOscStatus = PLIB_OSC_PrimaryOscInSleepModeIsEnabled(OSC_ID_0);
5.6.14.6.3 Secondary Oscillator Setup Functions
5.6.14.6.3.1 PLIB_OSC_SecondaryDisable Function
C
void PLIB_OSC_SecondaryDisable(
OSC_MODULE_ID index
);
Description
This function disables the Secondary Oscillator.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSecondaryEnable in your application to determine whether this feature is available.
Example
PLIB_OSC_SecondaryDisable(OSC_ID_0);
5.6.14.6.3.2 PLIB_OSC_SecondaryEnable Function
C
void PLIB_OSC_SecondaryEnable(
OSC_MODULE_ID index
);
Description
This function enables the Secondary Oscillator.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSecondaryEnable in your application to determine whether this feature is available.
Example
PLIB_OSC_SecondaryEnable(OSC_ID_0);
5.6.14.6.3.3 PLIB_OSC_SecondaryIsEnabled Function
C
bool PLIB_OSC_SecondaryIsEnabled(
OSC_MODULE_ID index
);
Description
This function returns 'true' if the Secondary Oscillator is enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
• true - Secondary Oscillator is enabled
• false - Secondary Oscillator is disabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSecondaryEnable in your application to determine whether this feature is available.
Example
bool secOscEnable;
secOscEnable = PLIB_OSC_SecondaryIsEnabled(OSC_ID_0);
5.6.14.6.3.4 PLIB_OSC_SecondaryIsReady Function
C
bool PLIB_OSC_SecondaryIsReady(
OSC_MODULE_ID index
);
Description
This function returns the ready status of the Secondary Oscillator.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
• true - Indicates that the Secondary Oscillator is running and is stable
• false - Secondary Oscillator is either turned off or is still warming up
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSecondaryReady in your application to determine whether this feature is available.
Example
bool secOscReady;
secOscReady = PLIB_OSC_SecondaryIsReady(OSC_ID_0);
5.6.14.6.4 Auxiliary Oscillator Setup Functions
5.6.14.6.4.1 PLIB_OSC_AuxClockSourceGet Function
C
OSC_AUX_CLOCK_SOURCE PLIB_OSC_AuxClockSourceGet(
OSC_MODULE_ID index
);
Description
This function gets the clock source for the auxiliary clock.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible values from OSC_AUX_CLOCK_SOURCE.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
OSC_AUX_CLOCK_SOURCE auxClockSource;
auxClockSource = PLIB_OSC_AuxClockSourceGet(OSC_ID_0);
5.6.14.6.4.2 PLIB_OSC_AuxClockSourceSet Function
C
void PLIB_OSC_AuxClockSourceSet(
OSC_MODULE_ID index,
OSC_AUX_CLOCK_SOURCE auxClockSource
);
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Description
This function sets the clock source for the auxiliary clock divisor.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
auxClockSource Clock source for the auxiliary clock divisor. One of the possible values from
OSC_AUX_CLOCK_SOURCE.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_AuxClockSourceSet(OSC_ID_0, OSC_AUX_CLOCK_PRIMARY);
5.6.14.6.4.3 PLIB_OSC_AuxModeGet Function
C
OSC_AUX_MODE PLIB_OSC_AuxModeGet(
OSC_MODULE_ID index
);
Description
This function gets the Auxiliary Oscillator mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible values of OSC_AUX_MODE.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
OSC_AUX_MODE auxOscMode;
auxOscMode = PLIB_OSC_AuxModeGet(OSC_ID_0);
5.6.14.6.4.4 PLIB_OSC_AuxModeSelect Function
C
void PLIB_OSC_AuxModeSelect(
OSC_MODULE_ID index,
OSC_AUX_MODE AuxOscMode
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);
Description
This function selects the Auxiliary Oscillator mode based on the input.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
auxOscMode One of the possible values of OSC_AUX_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_AuxModeSelect(OSC_ID_0, OSC_AUX_MODE_HS);
5.6.14.6.5 Reference Oscillator Setup Functions
5.6.14.6.5.1 PLIB_OSC_ReferenceOscBaseClockSelect Function
C
void PLIB_OSC_ReferenceOscBaseClockSelect(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc,
OSC_REF_BASECLOCK refOscBaseClock
);
Description
This function sets the base clock for the reference oscillator. There are multiple clock sources by which the user can configure
the module to output to the pin. Users can check the accuracy of the clock by probing the pin. Use the
PLIB_OSC_ReferenceOscDivisorValueSet function to divide the clock if it is a very high value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
refOscBaseClk One of the possible values of OSC_REF_BASECLOCK
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscBaseClock in your application to determine whether this feature is available.
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Example
PLIB_OSC_ReferenceOscBaseClockSelect(OSC_ID_0, OSC_REFERENCE_1, OSC_REF_BASECLOCK_PBCLK);
5.6.14.6.5.2 PLIB_OSC_ReferenceOscDisable Function
C
void PLIB_OSC_ReferenceOscDisable(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function disables output from the reference oscillator.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscEnable in your application to determine whether this feature is available.
Example
PLIB_OSC_ReferenceOscDisable(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.3 PLIB_OSC_ReferenceOscDivisorValueSet Function
C
void PLIB_OSC_ReferenceOscDivisorValueSet(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc,
OSC_REF_DIVISOR_TYPE refOscValue
);
Description
This function selects the reference oscillator divisor value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
refOscDiv One of the possible values of OSC_REF_DIV
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscDivisor in your application to determine whether this feature is available.
The value entered may not be the actual divisor. Please refer to the specific device data sheet to determine the actual divisor
corresponding to the value entered.
Example
// Select the clock source.
PLIB_OSC_ReferenceOscBaseClockSelect(OSC_ID_0, OSC_REFERENCE_1, OSC_REF_BASECLOCK_PBCLK);
PLIB_OSC_ReferenceOscDivisorValueSet(OSC_ID_0, OSC_REFERENCE_1, 128);
PLIB_OSC_ReferenceOscEnable(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.4 PLIB_OSC_ReferenceOscEnable Function
C
void PLIB_OSC_ReferenceOscEnable(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function enables the reference oscillator.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscEnable in your application to determine whether this feature is available.
If the device has a reference clock output enable control, calling this function may not give the reference clock output. Use the
PLIB_OSC_ReferenceOutputEnable function to enable the output.
Example
PLIB_OSC_ReferenceOscEnable(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.5 PLIB_OSC_ReferenceOscIsEnabled Function
C
bool PLIB_OSC_ReferenceOscIsEnabled(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
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);
Description
This function gets the enable status of the reference oscillator output.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
• true - Reference oscillator is enabled
• false - Reference oscillator is disabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscEnable in your application to determine whether this feature is available.
Example
if(PLIB_OSC_ReferenceOscIsEnabled(OSC_ID_0, OSC_REFERENCE_1))
{
//Do some action
}
5.6.14.6.5.6 PLIB_OSC_ReferenceOscSourceChangeIsActive Function
C
bool PLIB_OSC_ReferenceOscSourceChangeIsActive(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function returns 'true' if the reference oscillator source change is in progress. The software is not allowed to give a new
source change request.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
• true - Reference oscillator change request is active
• false - Reference oscillator change request is not active
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscChangeActive in your application to determine whether this feature is available.
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Example
if (!PLIB_OSC_ReferenceOscSourceChangeIsActive(OSC_ID_0, OSC_REFERENCE_1))
{
//Allowed to change the reference clock source
}
5.6.14.6.5.7 PLIB_OSC_ReferenceOscStopInIdleDisable Function
C
void PLIB_OSC_ReferenceOscStopInIdleDisable(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function enables the reference oscillator in Idle mode. The reference oscillator continues to run in Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscStopInIdleEnable in your application to determine whether this feature is available.
The default state of the device is the reference oscillator is enabled in Idle mode.
Example
PLIB_OSC_ReferenceOsctopInSleepDisable(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.8 PLIB_OSC_ReferenceOscStopInIdleEnable Function
C
void PLIB_OSC_ReferenceOscStopInIdleEnable(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function configures the reference oscillator to stop operating in Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscStopInIdleEnable in your application to determine whether this feature is available.
The default state of the device is reference oscillator enabled in Idle mode. Therefore, calling this function is necessary only if the
PLIB_OSC_ReferenceOscStopInIdleDisable function was previously called, and the software wants to enable oscillator
operation in Sleep mode.
Example
PLIB_OSC_ReferenceOscStopInIdleEnable(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.9 PLIB_OSC_ReferenceOscStopInIdleIsEnabled Function
C
bool PLIB_OSC_ReferenceOscStopInIdleIsEnabled(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function returns 'true' if the reference oscillator is disabled in Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
• true - Reference oscillator is disabled in Idle mode
• false - Reference oscillator is enabled in Idle mode
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscStopInIdleEnable in your application to determine whether this feature is available.
Example
bool refOscIdle;
refOscIdle = PLIB_OSC_ReferenceOscStopInIdleIsEnabled(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.10 PLIB_OSC_ReferenceOscStopInSleepDisable Function
C
void PLIB_OSC_ReferenceOscStopInSleepDisable(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
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Description
This function enables the reference oscillator in Sleep mode. The reference oscillator continues to run in Sleep mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscStopInSleep in your application to determine whether this feature is available.
The reference clock output will be stopped in Sleep mode if the base clock selected is 'System Clock' or 'Peripheral Clock'
regardless of this function.
The default state of the device is for the reference oscillator to be enabled in Sleep mode. Therefore, calling this function is
necessary only if the PLIB_OSC_ReferenceOscStopInSleepEnable function was previously called, and the software wants to
enable oscillator operation in Sleep mode.
Example
PLIB_OSC_ReferenceOsctopInSleepDisable(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.11 PLIB_OSC_ReferenceOscStopInSleepEnable Function
C
void PLIB_OSC_ReferenceOscStopInSleepEnable(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function configures the reference oscillator to stop operating in Sleep mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscStopInSleep in your application to determine whether this feature is available.
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The default state of the device is for the reference oscillator to be enabled in Sleep mode.
Example
PLIB_OSC_ReferenceOscStopInSleepEnable(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.12 PLIB_OSC_ReferenceOscStopInSleepIsEnabled Function
C
bool PLIB_OSC_ReferenceOscStopInSleepIsEnabled(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function returns 'true' if the reference oscillator is disabled in Sleep mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
• true - Reference oscillator is disabled in Sleep mode
• false - Reference oscillator is enabled in Sleep mode
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscStopInSleep in your application to determine whether this feature is available.
Example
bool refOscSleep;
refOscSleep = PLIB_OSC_ReferenceOscStopInSleepIsEnabled(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.13 PLIB_OSC_ReferenceOscSwitchIsComplete Function
C
bool PLIB_OSC_ReferenceOscSwitchIsComplete(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function returns 'true' if the reference oscillator base clock switching is complete.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
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Returns
• true - Reference clock base clock switching is complete
• false - Reference clock base clock switching is not complete; switching is not started
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscChange in your application to determine whether this feature is available.
Example
bool refOscIdle;
refOscIdle = PLIB_OSC_ReferenceOscSwitchIsComplete(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.14 PLIB_OSC_ReferenceOscTrimSet Function
C
void PLIB_OSC_ReferenceOscTrimSet(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc,
OSC_REF_TRIM_TYPE trimValue
);
Description
This function selects the reference oscillator divisor trim value. The value selected divided by OSC_REF_TRIM_MAX_VALUE
will be added to the oscillator divisor value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
trimValue Reference oscillator trim value
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOscTrim in your application to determine whether this feature is available.
Example
PLIB_OSC_ReferenceOscTrimSet(OSC_ID_0, OSC_REFERENCE_1, 50);
5.6.14.6.5.15 PLIB_OSC_ReferenceOutputDisable Function
C
void PLIB_OSC_ReferenceOutputDisable(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function disables the reference oscillator output.
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Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOutputEnable in your application to determine whether this feature is available.
The default state of the device is reference oscillator output disabled.
Example
PLIB_OSC_ReferenceOutputDisable(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.16 PLIB_OSC_ReferenceOutputEnable Function
C
void PLIB_OSC_ReferenceOutputEnable(
OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function enables the reference oscillator output.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOutputEnable in your application to determine whether this feature is available.
The default state of the device is reference oscillator output disabled.
Example
PLIB_OSC_ReferenceOutputEnable(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.5.17 PLIB_OSC_ReferenceOutputIsEnabled Function
C
bool PLIB_OSC_ReferenceOutputIsEnabled(
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OSC_MODULE_ID index,
OSC_REFERENCE referenceOsc
);
Description
This function returns 'true' if the reference oscillator output is enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
referenceOsc Identifies the desired reference oscillator
Returns
• true - Reference oscillator output is enabled
• false - Reference oscillator output is disabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsReferenceOutputEnable in your application to determine whether this feature is available.
Example
bool refOscIdle;
refOscIdle = PLIB_OSC_ReferenceOutputIsEnabled(OSC_ID_0, OSC_REFERENCE_1);
5.6.14.6.6 Fast RC Oscillator Setup Functions
5.6.14.6.6.1 PLIB_OSC_FRCDitherEnable Function
C
void PLIB_OSC_FRCDitherEnable(
OSC_MODULE_ID index
);
Description
This function enables the FRC Oscillator clock dithering.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
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Example
PLIB_OSC_FRCDitherEnable(OSC_ID_0);
5.6.14.6.6.2 PLIB_OSC_FRCDivisorGet Function
C
OSC_FRC_DIV PLIB_OSC_FRCDivisorGet(
OSC_MODULE_ID index
);
Description
This function gets the FRC clock divisor.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible values from OSC_FRC_DIV.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsFRCDivisor in your application to determine whether this feature is available.
Example
OSC_FRC_DIV divisorFRC;
divisorFRC = PLIB_OSC_FRCDivisorGet(OSC_ID_0);
5.6.14.6.6.3 PLIB_OSC_FRCDivisorSelect Function
C
void PLIB_OSC_FRCDivisorSelect(
OSC_MODULE_ID index,
OSC_FRC_DIV divisorFRC
);
Description
This function sets the FRC clock divisor to the specified value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
divisorFRC One of the possible values from OSC_FRC_DIV
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsFRCDivisor in your application to determine whether this feature is available.
Example
PLIB_OSC_FRCDivisorSelect ( OSC_ID_0, OSC_FRC_DIV_4 );
5.6.14.6.6.4 PLIB_OSC_FRCTuningModeGet Function
C
OSC_TUNING_MODE PLIB_OSC_FRCTuningModeGet(
OSC_MODULE_ID index
);
Description
This function gets the FRC oscillator tuning mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible value from OSC_TUNING_MODE enum.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
if (OSC_TUNING_USING_NUMBER == PLIB_OSC_FRCTuningModeGet(OSC_ID_0))
{
//Do some action
}
5.6.14.6.6.5 PLIB_OSC_FRCTuningModeSet Function
C
void PLIB_OSC_FRCTuningModeSet(
OSC_MODULE_ID index,
OSC_TUNING_MODE tuningMode
);
Description
This function selects the FRC oscillator tuning mode.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
tuningMode One of the possible value from OSC_TUNING_MODE.
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsFRCTuning in your application to determine whether this feature is available.
This function takes care of the register unlock, which is required per the device data sheet. Therefore, the user need not explicity
perform the unlock sequence.
Example
PLIB_OSC_FRCTuningModeSet(OSC_ID_0, OSC_TUNING_USING_NUMBER);
5.6.14.6.6.6 PLIB_OSC_FRCTuningSelect Function
C
void PLIB_OSC_FRCTuningSelect(
OSC_MODULE_ID index,
OSC_FRC_TUNE_TYPE tuningValue
);
Description
This function tunes the FRC oscillator to the value specified. The application is supposed to try different values and find the best
one. If the device has different tuning modes, this function will be used differently. See the example provided for the
PLIB_OSC_FRCTuningSequenceValueSet function for details.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
tuningValue Tuning value. One of the possible values from OSC_FRC_TUNE_TYPE.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsFRCTuning in your application to determine whether this feature is available.
This function takes care of the register unlock, which is required per the device data sheet. Therefore, the user need not explicitly
perform the unlock sequence.
Example
PLIB_OSC_FRCTuningSelect(OSC_ID_0, 0x05);
5.6.14.6.6.7 PLIB_OSC_FRCTuningSequenceValueGet Function
C
OSC_FRC_TUNE_TYPE PLIB_OSC_FRCTuningSequenceValueGet(
OSC_MODULE_ID index,
OSC_TUNING_SEQUENCERS oscSeqencer
);
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Description
This function gets the value set in the selected FRC tune sequencer.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
oscSeqencer Value to be set in the sequencer
Returns
Value in the sequencer specified. One of the possible value from OSC_FRC_TUNE_TYPE.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
This API takes care of the register unlock, which is required per the device datasheet. Therefore, the need not explicity perform
the unlock sequence.
Example
OSC_FRC_TUNE_TYPE seqValue;
seqValue = PLIB_OSC_FRCTuningSequenceValueGet(OSC_ID_0,
OSC_TUNING_SEQUENCER_1);
5.6.14.6.6.8 PLIB_OSC_FRCTuningSequenceValueSet Function
C
void PLIB_OSC_FRCTuningSequenceValueSet(
OSC_MODULE_ID index,
OSC_TUNING_SEQUENCERS oscSeqencer,
OSC_FRC_TUNE_TYPE seqValue
);
Description
This function sets the value in the FRC tune sequencer.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
oscSeqencer Select the sequencer
seqValue Value to be set in the sequencer. One of the possible values from
OSC_FRC_TUNE_TYPE.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
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Example
PLIB_OSC_FRCTuningModeSet(OSC_ID_0, OSC_TUNING_SEQ_DITHER);
PLIB_OSC_FRCTuningSelect(OSC_ID_0, 0x01);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_1,
OSC_FRC_TUNE_MINUS_2_25_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_2,
OSC_FRC_TUNE_MINUS_1_5_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_3,
OSC_FRC_TUNE_MINUS_0_375_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_4,
OSC_FRC_TUNE_PLUS_0_43_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_5,
OSC_FRC_TUNE_PLUS_1_29_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_6,
OSC_FRC_TUNE_PLUS_2_54_PERCENT);
PLIB_OSC_FRCTuningSequenceValueSet(OSC_ID_0, OSC_TUNING_SEQUENCER_7,
OSC_FRC_TUNE_MINUS_3_PERCENT);
//Configure PWM (period, pulse width and turn on the module)
5.6.14.6.6.9 PLIB_OSC_LinearFeedbackShiftRegGet Function
C
OSC_LFSR_TYPE PLIB_OSC_LinearFeedbackShiftRegGet(
OSC_MODULE_ID index
);
Description
This function gets the value from the linear feedback shift register.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
OSC_LFSR_TYPE - Linear Feedback shift register
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
OSC_LFSR_TYPE linearFbValue;
linearFbValue = PLIB_OSC_LinearFeedbackShiftRegGet(OSC_ID_0);
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5.6.14.6.6.10 PLIB_OSC_LinearFeedbackShiftRegSet Function
C
void PLIB_OSC_LinearFeedbackShiftRegSet(
OSC_MODULE_ID index,
OSC_LFSR_TYPE linearFbValue
);
Description
This function sets the linear feedback shift register. When the FRC oscillator tuning mode is configured for pseudo-random
number-based dithering, this function is used to provide the seed number for the pseudo-random number generation algorithm.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
linearFbValue The pseudo-random FRC trim value
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
This function takes care of the register unlock, which is required per the device data sheet. Therefore, the user need not explicity
perform the unlock sequence.
Example
PLIB_OSC_FRCTuningModeSet(OSC_ID_0, OSC_TUNING_PSEUDO_RANDOM);
//15 bit Linear Feedback shift register value
PLIB_OSC_LinearFeedbackShiftRegSet(OSC_ID_0, 0x7F);
5.6.14.6.7 Oscillator Switch Setup Functions
5.6.14.6.7.1 PLIB_OSC_ClockSwitchingAbort Function
C
void PLIB_OSC_ClockSwitchingAbort(
OSC_MODULE_ID index
);
Description
This function aborts the oscillator switch to the selection specified by the new oscillator selection bits.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsOscSwitchInit in your application to determine whether this feature is available.
Example
PLIB_OSC_ClockSwitchingAbort(OSC_ID_0);
5.6.14.6.7.2 PLIB_OSC_ClockSwitchingIsComplete Function
C
bool PLIB_OSC_ClockSwitchingIsComplete(
OSC_MODULE_ID index
);
Description
This function gets the status of the oscillator switch progress.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
true - Oscillator switch is complete false - Oscillator switch is in progress
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsOscSwitchInit in your application to determine whether this feature is available.
This function takes care of the register unlock, which is required per the device datasheet. Therefore, the user need not explicity
perform the unlock sequence.
Example
PLIB_OSC_SysClockSelect(OSC_ID_0, OSC_PRIMARY);
while(!PLIB_OSC_ClockSwitchingIsComplete(OSC_ID_0));
5.6.14.6.7.3 PLIB_OSC_CurrentSysClockGet Function
C
OSC_SYS_TYPE PLIB_OSC_CurrentSysClockGet(
OSC_MODULE_ID index
);
Description
This function gets the current oscillater. If the application hasn't changed the oscillator selection, this will be same as the
oscillator selected through the Configuration bits.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible values from OSC_SYS_TYPE.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsOscCurrentGet in your application to determine whether this feature is available.
Example
OSC_SYS_TYPE oscCurrent;
oscCurrent = PLIB_OSC_CurrentSysClockGet(OSC_ID_0);
5.6.14.6.7.4 PLIB_OSC_SysClockSelect Function
C
void PLIB_OSC_SysClockSelect(
OSC_MODULE_ID index,
OSC_SYS_TYPE newOsc
);
Description
This function selects the new oscillator.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
newOsc One of the possible values from OSC_SYS_TYPE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsOscSelect in your application to determine whether this feature is available.
This function takes care of the register unlock, which is required per the device datasheet. Therefore, the user need not explicitly
perform the unlock sequence.
This function adds the necessary delay (NOP instructions) after switching the oscillator. Therefore, the user need not add any
delay as specified in the device data sheet.
Example
PLIB_OSC_SysClockSelect(OSC_ID_0, OSC_PRIMARY);
5.6.14.6.8 Doze Setup Functions
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5.6.14.6.8.1 PLIB_OSC_DozeModeDisable Function
C
void PLIB_OSC_DozeModeDisable(
OSC_MODULE_ID index
);
Description
This function disables Doze mode. The CPU peripheral clock ratio is set to 1:1.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
This function adds the necessary delay (NOP instructions), which must be added immediately before entering Doze mode and
immediately after exiting Doze mode.
Example
PLIB_OSC_DozeModeDisable(OSC_ID_0);
5.6.14.6.8.2 PLIB_OSC_DozeModeEnable Function
C
void PLIB_OSC_DozeModeEnable(
OSC_MODULE_ID index
);
Description
This function enables Doze mode. This is a method to reduce power consumption By reducing the processor clock. Use the
PLIB_OSC_DozeRatioSelect function to specify the CPU peripheral clock ratio.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
This function adds the necessary delay (NOP instructions), which must be added immediately before entering Doze mode and
immediately after exiting Doze mode.
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Example
PLIB_OSC_DozeModeEnable(OSC_ID_0);
5.6.14.6.8.3 PLIB_OSC_DozeRatioGet Function
C
OSC_DOZE_RATIO PLIB_OSC_DozeRatioGet(
OSC_MODULE_ID index
);
Description
This function gets the Doze ratio, which is the ratio between the processor clock and the peripheral clock.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible values of OSC_DOZE_RATIO.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
OSC_DOZE_RATIO dozeRatio;
dozeRatio = PLIB_OSC_DozeRatioGet(OSC_ID_0);
5.6.14.6.8.4 PLIB_OSC_DozeRatioSelect Function
C
void PLIB_OSC_DozeRatioSelect(
OSC_MODULE_ID index,
OSC_DOZE_RATIO dozeRatio
);
Description
This function selects the Doze ratio, which is the ratio between the processor clock and the peripheral clock. By default, the ratio
between the processor clock and the peripheral clock is 1:1.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
dozeRatio One of the possible values of OSC_DOZE_RATIO
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_DozeRatioSelect(OSC_ID_0, OSC_DOZE_RATIO_4);
5.6.14.6.8.5 PLIB_OSC_DozeRecoverOnInterruptDisable Function
C
void PLIB_OSC_DozeRecoverOnInterruptDisable(
OSC_MODULE_ID index
);
Description
This function disables feature of recovering from Doze mode upon an interrupt. Interrupts will not affect the power-saving Doze
mode enable.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_DozeRecoverOnInterruptDisable(OSC_ID_0);
5.6.14.6.8.6 PLIB_OSC_DozeRecoverOnInterruptEnable Function
C
void PLIB_OSC_DozeRecoverOnInterruptEnable(
OSC_MODULE_ID index
);
Description
This function enables the feature of recovering from Doze mode upon an interrupt. Interrupts clear the power-saving Doze mode
enable and reset the CPU peripheral clock ratio to 1:1.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_DozeRecoverOnInterruptEnable(OSC_ID_0);
5.6.14.6.8.7 PLIB_OSC_DozeRecoverOnInterruptIsEnabled Function
C
bool PLIB_OSC_DozeRecoverOnInterruptIsEnabled(
OSC_MODULE_ID index
);
Description
This function returns 'true' if recover from Doze mode on interrupt is enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
• true - Recover from Doze mode on interrupt is enabled
• false - Recover from Doze mode on interrupt is disabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
bool recoverOnInt;
recoverOnInt = PLIB_OSC_DozeRecoverOnInterruptIsEnabled(OSC_ID_0);
5.6.14.6.9 USB and Display Clock Setup Functions
5.6.14.6.9.1 PLIB_OSC_GraphicsClockDivisorGet Function
C
uint8_t PLIB_OSC_GraphicsClockDivisorGet(
OSC_MODULE_ID index
);
Description
This function gets the Graphics module clock divisor.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
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Returns
Graphics module clock divisor.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
uint8_t displayClockDiv;
displayClockDiv = PLIB_OSC_GraphicsClockDivisorGet(OSC_ID_0);
5.6.14.6.9.2 PLIB_OSC_GraphicsClockDivisorSet Function
C
void PLIB_OSC_GraphicsClockDivisorSet(
OSC_MODULE_ID index,
uint8_t clockDivisor
);
Description
This function sets the Graphics module clock divisor.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
clockDivisor Graphics module clock divisor
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_GraphicsClockDivisorSet(OSC_ID_0, 127);
5.6.14.6.9.3 PLIB_OSC_GraphicsClockSourceGet Function
C
OSC_GFX_CLOCK PLIB_OSC_GraphicsClockSourceGet(
OSC_MODULE_ID index
);
Description
This function gets the clock frequency used for the Graphics Controller module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
OSC_GFX_CLOCK gfxClock;
gfxClock = PLIB_OSC_GraphicsClockSourceGet (OSC_ID_0);
5.6.14.6.9.4 PLIB_OSC_GraphicsClockSourceSelect Function
C
void PLIB_OSC_GraphicsClockSourceSelect(
OSC_MODULE_ID index,
OSC_GFX_CLOCK gfxClock
);
Description
This function sets the clock frequency for the Graphics Controller module.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
gfxClock One of the possible values of OSC_GFX_CLOCK
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_GraphicsClockSourceSelect (OSC_ID_0, OSC_GFX_CLOCK_96M);
5.6.14.6.9.5 PLIB_OSC_UsbClockSourceGet Function
C
OSC_USBCLOCK_SOURCE PLIB_OSC_UsbClockSourceGet(
OSC_MODULE_ID index
);
Description
This function gets the USB module clock source.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
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Returns
USB module clock source. One of the possible values from OSC_USBCLOCK_SOURCE.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsUsbClockSource in your application to determine whether this feature is available.
Example
if (SYS_OSC_USBCLK_FRC == PLIB_OSC_UsbClockSourceGet(OSC_ID_0))
{
//Do some action
}
5.6.14.6.9.6 PLIB_OSC_UsbClockSourceSelect Function
C
void PLIB_OSC_UsbClockSourceSelect(
OSC_MODULE_ID index,
OSC_USBCLOCK_SOURCE usbClock
);
Description
This function sets the USB module clock source.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
usbClock Select the USB module clock source. One of the possible values from
OSC_USBCLOCK_SOURCE.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsUsbClockSource in your application to determine whether this feature is available.
Before placing the USB module in Suspend mode, use this function to enable the FRC clock.
Example
PLIB_OSC_UsbClockSourceSelect(OSC_ID_0, SYS_OSC_USBCLK_FRC);
5.6.14.6.10 PLL Setup Functions
5.6.14.6.10.1 PLIB_OSC_PLLAuxClockSourceGet Function
C
OSC_PLLAUX_CLOCK_SOURCE PLIB_OSC_PLLAuxClockSourceGet(
OSC_MODULE_ID index
);
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Description
This function returns the clock source selected for the Auxiliary PLL.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
The source for the auxiliary clock. One of the possible values from OSC_PLLAUX_CLOCK_SOURCE.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
if(OSC_PLLAUX_CLOCK == PLIB_OSC_PLLAuxClockSourceGet(OSC_ID_0))
{
//Take some action
}
5.6.14.6.10.2 PLIB_OSC_PLLAuxClockSourceSelect Function
C
void PLIB_OSC_PLLAuxClockSourceSelect(
OSC_MODULE_ID index,
OSC_PLLAUX_CLOCK_SOURCE auxPLLClkSrc
);
Description
This function sets the Auxiliary PLL clock source to either the Primary oscillator or the Auxiliary oscillator depending on the input.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
auxPLLClkSrc The source for the auxiliary clock. One of the possible values from
OSC_PLLAUX_CLOCK_SOURCE.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_PLLAuxClockSourceSelect(OSC_ID_0, OSC_PLLAUX_CLOCK);
5.6.14.6.10.3 PLIB_OSC_PLLAuxInputDivisorGet Function
C
OSC_AUXPLL_IN_DIV PLIB_OSC_PLLAuxInputDivisorGet(
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OSC_MODULE_ID index
);
Description
This function gets the input divisor for the Auxiliary PLL.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible values from OSC_AUXPLL_IN_DIV.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
OSC_AUXPLL_IN_DIV auxPLLInDiv;
auxPLLInDiv = PLIB_OSC_PLLAuxInputDivisorGet(OSC_ID_0);
5.6.14.6.10.4 PLIB_OSC_PLLAuxInputDivisorSelect Function
C
void PLIB_OSC_PLLAuxInputDivisorSelect(
OSC_MODULE_ID index,
OSC_AUXPLL_IN_DIV auxPLLInDiv
);
Description
This function sets the input divisor for the Auxiliary PLL to the specified value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
auxPLLInDiv One of the possible values from OSC_AUXPLL_IN_DIV
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_PLLAuxInputDivisorSelect(OSC_ID_0, OSC_AUXPLL_IN_DIV_2);
5.6.14.6.10.5 PLIB_OSC_PLLAuxIsLocked Function
C
bool PLIB_OSC_PLLAuxIsLocked(
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OSC_MODULE_ID index
);
Description
This function returns 'true' if the Auxiliary PLL is locked.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
• true - Auxiliary PLL is in lock
• false - Auxiliary PLL is not in lock
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
bool lockAuxPLL;
lockAuxPLL = PLIB_OSC_PLLAuxIsLocked(OSC_ID_0);
5.6.14.6.10.6 PLIB_OSC_PLLAuxMultiplierGet Function
C
OSC_AUXPLL_MULTIPLIER PLIB_OSC_PLLAuxMultiplierGet(
OSC_MODULE_ID index
);
Description
This function gets the Auxiliary PLL multiplier.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible values from OSC_PLL_MUL.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
OSC_AUXPLL_MULTIPLIER auxpllMultiply;
auxpllMultiply = PLIB_OSC_PLLAuxMultiplierGet(OSC_ID_0);
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5.6.14.6.10.7 PLIB_OSC_PLLAuxMultiplierSelect Function
C
void PLIB_OSC_PLLAuxMultiplierSelect(
OSC_MODULE_ID index,
OSC_AUXPLL_MULTIPLIER auxPllMultiplier
);
Description
This function sets the Auxiliary PLL multiplier to the specified value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
auxPllMultiplier One of the possible values from OSC_AUXPLL_MULTIPLIER
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_PLLAuxMultiplierSelect (OSC_ID_0, OSC_AUXPLL_MULTIPLIER_4);
5.6.14.6.10.8 PLIB_OSC_PLLAuxOutputDivisorGet Function
C
OSC_AUXPLL_OUT_DIV PLIB_OSC_PLLAuxOutputDivisorGet(
OSC_MODULE_ID index
);
Description
This function gets the output divisor for the Auxiliary PLL.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible values from OSC_AUXPLL_OUT_DIV.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
OSC_AUXPLL_OUT_DIV auxOutputDiv;
auxOutputDiv = PLIB_OSC_PLLAuxOutputDivisorGet(OSC_ID_0);
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5.6.14.6.10.9 PLIB_OSC_PLLAuxOutputDivisorSet Function
C
void PLIB_OSC_PLLAuxOutputDivisorSet(
OSC_MODULE_ID index,
OSC_AUXPLL_OUT_DIV auxOutputDiv
);
Description
This function sets the output divisor for the Auxiliary PLL to the specified value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
auxOutputDiv One of the possible values from OSC_AUXPLL_OUT_DIV
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_PLLAuxOutputDivisorSet(OSC_ID_0, OSC_AUXPLL_OUT_DIV_2);
5.6.14.6.10.10 PLIB_OSC_PLLClockIsLocked Function
C
bool PLIB_OSC_PLLClockIsLocked(
OSC_MODULE_ID index
);
Description
This function gets the lock status for the clock and PLL selections.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
• true - clock and PLL selections are locked
• false - clock and PLL selections are not locked
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsPLLClockLock in your application to determine whether this feature is available.
If the PLL does not stabilize properly during start-up, this function may not reflect the actual status of PLL lock, nor does it detect
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when the PLL loses lock during normal operation.
Example
bool clockPLL_st;
clockPLL_st = PLIB_OSC_PLLClockIsLocked(OSC_ID_0);
5.6.14.6.10.11 PLIB_OSC_PLLClockLock Function
C
void PLIB_OSC_PLLClockLock(
OSC_MODULE_ID index
);
Description
This function locks the clock and PLL selections.
Preconditions
The Fail-Safe Clock Monitor (FSCM) should be enabled.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsPLLClockLock in your application to determine whether this feature is available.
The data given by this API is valid only if clock switching and monitoring is enabled. Otherwise Clock and PLL selections are
never locked and may be modified.
Example
PLIB_OSC_PLLClockLock(OSC_ID_0);
5.6.14.6.10.12 PLIB_OSC_PLLClockUnlock Function
C
void PLIB_OSC_PLLClockUnlock(
OSC_MODULE_ID index
);
Description
This function unlocks the clock and PLL selection so that the clock and PLL may be modified.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsPLLClockLock in your application to determine whether this feature is available.
This function takes care of the register unlock, which is required per the device data sheet. Therefore, the user need not explicity
perform the unlock sequence.
Example
PLIB_OSC_PLLClockUnlock(OSC_ID_0);
5.6.14.6.10.13 PLIB_OSC_PLLDisable Function
C
void PLIB_OSC_PLLDisable(
OSC_MODULE_ID index,
OSC_PLL_SELECT selectPLL
);
Description
This function disables the the specified PLL.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
selectPLL PLL to be enabled. One of the possible values from OSC_PLL_SELECT.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_PLLDisable(OSC_ID_0, OSC_PLL_SYSTEM);
5.6.14.6.10.14 PLIB_OSC_PLLEnable Function
C
void PLIB_OSC_PLLEnable(
OSC_MODULE_ID index,
OSC_PLL_SELECT selectPLL
);
Description
This function enables the the specified PLL.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
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selectPLL PLL to be enabled. One of the possible values from OSC_PLL_SELECT.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
PLIB_OSC_PLLEnable(OSC_ID_0, OSC_PLL_SYSTEM);
5.6.14.6.10.15 PLIB_OSC_PLLIsEnabled Function
C
bool PLIB_OSC_PLLIsEnabled(
OSC_MODULE_ID index,
OSC_PLL_SELECT selectPLL
);
Description
This function returns 'true' if the specified PLL is enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
selectPLL PLL to be enabled. One of the possible values from OSC_PLL_SELECT.
Returns
• true - The specified PLL is enabled
• false - The specified PLL is disabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability.
Example
if (PLIB_OSC_PLLIsEnabled(OSC_ID_0, OSC_PLL_SYSTEM))
{
//Do some action
}
5.6.14.6.10.16 PLIB_OSC_PLLIsLocked Function
C
bool PLIB_OSC_PLLIsLocked(
OSC_MODULE_ID index,
OSC_PLL_SELECT pllselect
);
Description
This function returns the status of the PLL lock.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired oscillator module
pllselect Selects the PLL.
Returns
• true - PLL module is in lock or PLL module start-up timer is satisfied
• false - PLL module is out of lock, PLL start-up timer is running, or PLL is disabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsPLLLockStatus in your application to determine whether this feature is available.
If the PLL does not stabilize properly during start-up, this function may not reflect the actual status of PLL lock, nor does it detect
when the PLL loses lock during normal operation.
Example
bool lockPLL_status;
lockPLL_status = PLIB_OSC_PLLIsLocked(OSC_ID_0, OSC_PLL_SYSTEM);
5.6.14.6.10.17 PLIB_OSC_SysPLLFrequencyRangeGet Function
C
OSC_SYSPLL_FREQ_RANGE PLIB_OSC_SysPLLFrequencyRangeGet(
OSC_MODULE_ID index
);
Description
This function returns the frequence range set for PLL
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
PLLFrequencyRange - One of the possible values from OSC_SYSPLL_FREQ_RANGE
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSysPLLFrequencyRange in your application to determine whether this feature is available.
Example
OSC_SYSPLL_FREQ_RANGE PLLFrequencyRange;
PLLFrequencyRange = PLIB_OSC_SysPLLFrequencyRangeGet(OSC_ID_0);
5.6.14.6.10.18 PLIB_OSC_SysPLLFrequencyRangeSet Function
C
void PLIB_OSC_SysPLLFrequencyRangeSet(
OSC_MODULE_ID index,
OSC_SYSPLL_FREQ_RANGE PLLFrequencyRange
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);
Description
This function sets the frequence range for PLL
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
PLLFrequencyRange One of the possible values from OSC_SYSPLL_FREQ_RANGE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSysPLLFrequencyRange in your application to determine whether this feature is available.
Example
PLIB_OSC_SysPLLFrequencyRangeSet(OSC_ID_0, OSC_SYSPLL_FREQ_RANGE_5M_TO_10M);
5.6.14.6.10.19 PLIB_OSC_SysPLLInputClockSourceGet Function
C
OSC_SYSPLL_IN_CLK_SOURCE PLIB_OSC_SysPLLInputClockSourceGet(
OSC_MODULE_ID index
);
Description
This function returns the input clock source for the PLL module
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
PLLInClockSource - One of the possible values from OSC_SYSPLL_IN_CLK_SOURCE
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSysPLLInputClockSource in your application to determine whether this feature is available.
Example
OSC_SYSPLL_IN_CLK_SOURCE PLLInClockSource;
PLLInClockSource = PLIB_OSC_SysPLLInputClockSourceGet(OSC_ID_0);
5.6.14.6.10.20 PLIB_OSC_SysPLLInputClockSourceSet Function
C
void PLIB_OSC_SysPLLInputClockSourceSet(
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OSC_MODULE_ID index,
OSC_SYSPLL_IN_CLK_SOURCE PLLInClockSource
);
Description
This function sets the input clock source for the PLL module
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
PLLInClockSource One of the possible values from OSC_SYSPLL_IN_CLK_SOURCE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSysPLLInputClockSource in your application to determine whether this feature is available.
Example
PLIB_OSC_SysPLLInputClockSourceSet(OSC_ID_0, OSC_SYSPLL_IN_CLK_SOURCE_FRC);
5.6.14.6.10.21 PLIB_OSC_SysPLLInputDivisorGet Function
C
OSC_SYSPLL_IN_DIV PLIB_OSC_SysPLLInputDivisorGet(
OSC_MODULE_ID index
);
Description
This function gets the input divisor for the PLL.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible values from OSC_SYSPLL_IN_DIV.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSysPLLInputDivisor in your application to determine whether this feature is available.
Example
OSC_SYSPLL_IN_DIV PLLInDiv;
PLLInDiv = PLIB_OSC_SysPLLInputDivisorGet(OSC_ID_0);
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5.6.14.6.10.22 PLIB_OSC_SysPLLInputDivisorSet Function
C
void PLIB_OSC_SysPLLInputDivisorSet(
OSC_MODULE_ID index,
OSC_SYSPLL_IN_DIV PLLInDiv
);
Description
This function sets the input divider for the PLL to the specified value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
PLLInDiv One of the possible values from OSC_SYSPLL_In_DIV
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSysPLLInputDivisor in your application to determine whether this feature is available.
Example
PLIB_OSC_SysPLLInputDivisorSet(OSC_ID_0, OSC_SYSPLL_IN_DIV_1);
5.6.14.6.10.23 PLIB_OSC_SysPLLMultiplierGet Function
C
OSC_SYSPLL_MULTIPLIER_TYPE PLIB_OSC_SysPLLMultiplierGet(
OSC_MODULE_ID index
);
Description
This function gets the PLL multiplier.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
One of the possible values of PB clock divisor of type OSC_SYSPLL_MULTIPLIER_TYPE.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSysPLLMultiplier in your application to determine whether this feature is available.
Actual Multipler value will be returned, NOT the 'PLLMULT' field value. Refer the data sheet of the device for the detail.
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Example
OSC_SYSPLL_MULTIPLIER_TYPE pll_multiply;
pll_multiply = PLIB_OSC_SysPLLMultiplierGet(OSC_ID_0);
5.6.14.6.10.24 PLIB_OSC_SysPLLMultiplierSelect Function
C
void PLIB_OSC_SysPLLMultiplierSelect(
OSC_MODULE_ID index,
OSC_SYSPLL_MULTIPLIER_TYPE pll_multiplier
);
Description
This function sets the PLL multiplier to the specified value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
pll_multiplier One of the possible values of PB clock divisor of type OSC_PLL_MUL_TYPE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSysPLLMultiplier in your application to determine whether this feature is available.
Use PLL Multiplier value directly for the parameter 'pll_multiplier', NOT the value of the 'PLLMULT' field. Library behaviour is
undefined in case of used PLL Multiplier value is not supported by the selected device. Refer the data sheet of the device for the
detail.
Example
PLIB_OSC_SysPLLMultiplierSelect (OSC_ID_0, 0x08);
5.6.14.6.10.25 PLIB_OSC_SysPLLOutputDivisorGet Function
C
OSC_SYSPLL_OUT_DIV PLIB_OSC_SysPLLOutputDivisorGet(
OSC_MODULE_ID index
);
Description
This function gets the output divisor for the PLL.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
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Returns
One of the possible values from OSC_SYSPLL_OUT_DIV.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSysPLLOutputDivisor in your application to determine whether this feature is available.
Example
OSC_SYSPLL_OUT_DIV PLLOutDiv;
PLLOutDiv = PLIB_OSC_SysPLLOutputDivisorGet(OSC_ID_0);
5.6.14.6.10.26 PLIB_OSC_SysPLLOutputDivisorSet Function
C
void PLIB_OSC_SysPLLOutputDivisorSet(
OSC_MODULE_ID index,
OSC_SYSPLL_OUT_DIV PLLOutDiv
);
Description
This function sets the output divider for the PLL to the specified value.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
PLLOutDiv One of the possible values from OSC_SYSPLL_OUT_DIV
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsSysPLLOutputDivisor in your application to determine whether this feature is available.
Example
PLIB_OSC_SysPLLOutputDivisorSelect(OSC_ID_0, OSC_SYSPLL_OUT_DIV_1);
5.6.14.6.11 Peripheral Clock Setup Functions
5.6.14.6.11.1 PLIB_OSC_PBClockDivisorGet Function
C
OSC_PB_CLOCK_DIV_TYPE PLIB_OSC_PBClockDivisorGet(
OSC_MODULE_ID index,
OSC_PERIPHERAL_BUS peripheralBusNumber
);
Description
This function gets the peripheral bus clock divisor.
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Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
peripheralBusNumber Identifies the desired peripheral bus
Returns
One of the possible values of PB clock divisor of type OSC_PB_CLOCK_DIV_TYPE.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsPBClockDivisor in your application to determine whether this feature is available.
Actual Divisor value will be returned, NOT the 'PBDIV' field value. Refer the data sheet of the device for the detail.
Example
OSC_PB_CLOCK_DIV_TYPE peripheralBusClkDiv;
peripheralBusClkDiv = PLIB_OSC_PBClockDivisorGet(OSC_ID_0,
OSC_PERIPHERAL_BUS_1);
5.6.14.6.11.2 PLIB_OSC_PBClockDivisorIsReady Function
C
bool PLIB_OSC_PBClockDivisorIsReady(
OSC_MODULE_ID index,
OSC_PERIPHERAL_BUS peripheralBusNumber
);
Description
This function checks whether the peripheral bus clock divisor is ready to be written.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
peripheralBusNumber Identifies the desired peripheral bus
Returns
• true - Peripheral bus clock divisor can be written
• false - Peripheral bus clock divisor cannot be written
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsPBClockReady in your application to determine whether this feature is available.
Example
if (PLIB_OSC_PBClockDivisorIsReady(OSC_ID_0, OSC_PERIPHERAL_BUS_1))
{
PLIB_OSC_PBClockDivisorSet (OSC_ID_0, OSC_PERIPHERAL_BUS_1,
0x01);
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}
5.6.14.6.11.3 PLIB_OSC_PBClockDivisorSet Function
C
void PLIB_OSC_PBClockDivisorSet(
OSC_MODULE_ID index,
OSC_PERIPHERAL_BUS peripheralBusNumber,
OSC_PB_CLOCK_DIV_TYPE peripheralBusClkDiv
);
Description
This function sets the peripheral bus clock divisor to the specified value.
Preconditions
Peripheral bus clock divisor should be ready to be written.
Parameters
Parameters Description
index Identifies the desired oscillator module
peripheralBusNumber Identifies the desired peripheral bus
peripheralBusClkDiv One of the possible values of PB clock divisor of type
OSC_PB_CLOCK_DIV_TYPE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsPBClockDivisor in your application to determine whether this feature is available.
Use PB Divider value directly for the parameter 'peripheralBusClkDiv', NOT the value of the 'PBDIV' field. Library behaviour is
undefined in case of used PB Divider value is not supported by the selected device. Refer the data sheet of the device for the
detail.
Example
PLIB_OSC_PBClockDivisorSet (OSC_ID_0, OSC_PERIPHERAL_BUS_1, 0x01);
5.6.14.6.11.4 PLIB_OSC_PBOutputClockDisable Function
C
void PLIB_OSC_PBOutputClockDisable(
OSC_MODULE_ID index,
OSC_PERIPHERAL_BUS peripheralBusNumber
);
Description
This function disables the peripheral bus output clock
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
peripheralBusNumber Identifies the desired peripheral bus
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Returns
None
Remarks
The clock for peripheral bus 1 cannot be turned off.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsPBClockOutputEnable in your application to determine whether this feature is available.
Example
PLIB_OSC_PBOutputClockDisable (OSC_ID_0, OSC_PERIPHERAL_BUS_2);
5.6.14.6.11.5 PLIB_OSC_PBOutputClockEnable Function
C
void PLIB_OSC_PBOutputClockEnable(
OSC_MODULE_ID index,
OSC_PERIPHERAL_BUS peripheralBusNumber
);
Description
This function enables the peripheral bus output clock
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
peripheralBusNumber Identifies the desired peripheral bus
Returns
None
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsPBClockOutputEnable in your application to determine whether this feature is available.
Example
PLIB_OSC_PBOutputClockEnable (OSC_ID_0, OSC_PERIPHERAL_BUS_2);
5.6.14.6.11.6 PLIB_OSC_PBOutputClockIsEnabled Function
C
bool PLIB_OSC_PBOutputClockIsEnabled(
OSC_MODULE_ID index,
OSC_PERIPHERAL_BUS peripheralBusNumber
);
Description
This function checks whether the peripheral bus clock output is enabled or not
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired oscillator module
peripheralBusNumber Identifies the desired peripheral bus
Returns
• true - Peripheral bus clock output is enabled
• false - Peripheral bus clock output is disabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsPBClockOutputEnable in your application to determine whether this feature is available.
Example
if (PLIB_OSC_PBOutputClockIsEnabled(OSC_ID_0, OSC_PERIPHERAL_BUS_2))
{
PLIB_OSC_PBOutputClockDisable(OSC_ID_0, OSC_PERIPHERAL_BUS_2);
}
5.6.14.6.12 Clock Fail Monitoring Functions
5.6.14.6.12.1 PLIB_OSC_ClockHasFailed Function
C
bool PLIB_OSC_ClockHasFailed(
OSC_MODULE_ID index
);
Description
This function returns 'true' if the clock fails. Monitors the Fail-Safe Clock Monitor (FSCM).
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired oscillator module
Returns
• true - Fail-Safe Clock Monitor (FSCM) detected a clock failure
• false - No clock failure has been detected
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_OSC_ExistsClockFail in your application to determine whether this feature is available.
Example
bool clockStatus;
clockStatus = PLIB_OSC_ClockHasFailed(OSC_ID_0);
5.6.14.6.13 Data Types and Constants
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5.6.14.6.13.1 OSC_PB_CLOCK_DIV_TYPE Macro
C
#define OSC_PB_CLOCK_DIV_TYPE SFR_TYPE
Description
Oscillator Peripheral Bus Clock Divisor Value Type
This macro defines the type of the oscillator PB Clock divisor value.
Remarks
None
5.6.14.6.13.2 OSC_REF_DIVISOR_TYPE Macro
C
#define OSC_REF_DIVISOR_TYPE SFR_TYPE
Description
Reference oscillator divisor type
This macro defines the reference oscillator divisor type. Please refer to the specific device data sheet to determine the possible
values of this type.
Remarks
None.
5.6.14.6.13.3 OSC_REFERENCE_MAX_DIV Macro
C
#define OSC_REFERENCE_MAX_DIV 65534
Description
Reference clock output divisor maximum
This macro defines the reference clock output divisor maximum value.
Remarks
None
5.6.14.6.13.4 OSC_SYSPLL_MULTIPLIER_TYPE Macro
C
#define OSC_SYSPLL_MULTIPLIER_TYPE SFR_TYPE
Description
Oscillator System PLL Multiplier Value Type
This macro defines the type of the oscillator system PLL multiplier value.
Remarks
None
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5.6.14.6.13.5 OSC_AUX_CLOCK_SOURCE Enumeration
C
typedef enum {
OSC_AUX_CLOCK_PRIMARY
} OSC_AUX_CLOCK_SOURCE;
Description
AUX PLL Input divider.
This enumeration lists the possible Auxiliary PLL input divider values.
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.6 OSC_AUX_MODE Enumeration
C
typedef enum {
OSC_AUX_MODE_EC,
OSC_AUX_MODE_XT,
OSC_AUX_MODE_HS,
OSC_AUX_DISABLE
} OSC_AUX_MODE;
Description
AUX Oscillator modes.
This enumeration lists the possible Auxiliary Oscillator mode values.
Members
Members Description
OSC_AUX_MODE_EC External clock Input
OSC_AUX_MODE_XT Crystal/resonator
OSC_AUX_MODE_HS High speed crystal
OSC_AUX_DISABLE AUX Oscillator disabled
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.7 OSC_AUXPLL_IN_DIV Enumeration
C
typedef enum {
OSC_AUXPLL_IN_DIV_1,
OSC_AUXPLL_IN_DIV_2,
OSC_AUXPLL_IN_DIV_3,
OSC_AUXPLL_IN_DIV_4,
OSC_AUXPLL_IN_DIV_5,
OSC_AUXPLL_IN_DIV_6,
OSC_AUXPLL_IN_DIV_10,
OSC_AUXPLL_IN_DIV_12
} OSC_AUXPLL_IN_DIV;
Description
AUX PLL Input divider.
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This enumeration lists the possible Auxiliary PLL input divider values.
Members
Members Description
OSC_AUXPLL_IN_DIV_1 Input divided by 1
OSC_AUXPLL_IN_DIV_2 Input divided by 2
OSC_AUXPLL_IN_DIV_3 Input divided by 3
OSC_AUXPLL_IN_DIV_4 Input divided by 4
OSC_AUXPLL_IN_DIV_5 Input divided by 5
OSC_AUXPLL_IN_DIV_6 Input divided by 6
OSC_AUXPLL_IN_DIV_10 Input divided by 10
OSC_AUXPLL_IN_DIV_12 Input divided by 12
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.8 OSC_AUXPLL_MULTIPLIER Enumeration
C
typedef enum {
OSC_AUXPLL_MULTIPLIER_4
} OSC_AUXPLL_MULTIPLIER;
Description
Aux PLL Multiplier
This enumeration lists the possible Auxiliary PLL multiplier
Members
Members Description
OSC_AUXPLL_MULTIPLIER_4 Auxiliary PLL multiplier value is 1:4
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.9 OSC_AUXPLL_OUT_DIV Enumeration
C
typedef enum {
OSC_AUXPLL_OUT_DIV_1,
OSC_AUXPLL_OUT_DIV_2,
OSC_AUXPLL_OUT_DIV_4,
OSC_AUXPLL_OUT_DIV_8,
OSC_AUXPLL_OUT_DIV_16,
OSC_AUXPLL_OUT_DIV_32,
OSC_AUXPLL_OUT_DIV_64,
OSC_AUXPLL_OUT_DIV_256
} OSC_AUXPLL_OUT_DIV;
Description
AUX PLL Output divider.
This enumeration lists the possible Auxiliary PLL output divider values.
5.6 Peripheral Library Help MPLAB Harmony Help Oscillator Peripheral Library
5-2395
Members
Members Description
OSC_AUXPLL_OUT_DIV_1 output divided by 1
OSC_AUXPLL_OUT_DIV_2 output divided by 2
OSC_AUXPLL_OUT_DIV_4 output divided by 4
OSC_AUXPLL_OUT_DIV_8 output divided by 8
OSC_AUXPLL_OUT_DIV_16 output divided by 16
OSC_AUXPLL_OUT_DIV_32 output divided by 32
OSC_AUXPLL_OUT_DIV_64 output divided by 64
OSC_AUXPLL_OUT_DIV_256 output divided by 256
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.10 OSC_DOZE_RATIO Enumeration
C
typedef enum {
OSC_DOZE_RATIO_1,
OSC_DOZE_RATIO_2,
OSC_DOZE_RATIO_4,
OSC_DOZE_RATIO_8,
OSC_DOZE_RATIO_16,
OSC_DOZE_RATIO_32,
OSC_DOZE_RATIO_64,
OSC_DOZE_RATIO_128
} OSC_DOZE_RATIO;
Description
DOZE bits(CPU peripheral clock ratio selection).
This enumeration lists the possible doze values(CPU clock to peripheral clock ratio).
Members
Members Description
OSC_DOZE_RATIO_1 CPU peripheral clock ratio 1:1
OSC_DOZE_RATIO_2 CPU peripheral clock ratio 1:2
OSC_DOZE_RATIO_4 CPU peripheral clock ratio 1:4
OSC_DOZE_RATIO_8 CPU peripheral clock ratio 1:8
OSC_DOZE_RATIO_16 CPU peripheral clock ratio 1:16
OSC_DOZE_RATIO_32 CPU peripheral clock ratio 1:32
OSC_DOZE_RATIO_64 CPU peripheral clock ratio 1:64
OSC_DOZE_RATIO_128 CPU peripheral clock ratio 1:128
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.11 OSC_FRC_DIV Enumeration
C
typedef enum {
OSC_FRC_DIV_1,
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OSC_FRC_DIV_2,
OSC_FRC_DIV_4,
OSC_FRC_DIV_8,
OSC_FRC_DIV_16,
OSC_FRC_DIV_32,
OSC_FRC_DIV_64,
OSC_FRC_DIV_256
} OSC_FRC_DIV;
Description
FRC divider.
This enumeration lists the possible FRC Oscillator divider values.
Members
Members Description
OSC_FRC_DIV_1 Fast RC Oscillator output Divide by 1
OSC_FRC_DIV_2 Fast RC Oscillator output Divide by 2
OSC_FRC_DIV_4 Fast RC Oscillator output Divide by 4
OSC_FRC_DIV_8 Fast RC Oscillator output Divide by 8
OSC_FRC_DIV_16 Fast RC Oscillator output Divide by 16
OSC_FRC_DIV_32 Fast RC Oscillator output Divide by 32
OSC_FRC_DIV_64 Fast RC Oscillator output Divide by 64
OSC_FRC_DIV_256 Fast RC Oscillator output Divide by 256
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.12 OSC_FRC_TUNE Enumeration
C
typedef enum {
OSC_FRC_TUNE_PLUS_3_PERCENT,
OSC_FRC_TUNE_PLUS_2_57_PERCENT,
OSC_FRC_TUNE_PLUS_2_54_PERCENT,
OSC_FRC_TUNE_PLUS_1_71_PERCENT,
OSC_FRC_TUNE_PLUS_1_29_PERCENT,
OSC_FRC_TUNE_PLUS_0_86_PERCENT,
OSC_FRC_TUNE_PLUS_0_43_PERCENT,
OSC_FRC_TUNE_CENTRAL_FREQ,
OSC_FRC_TUNE_MINUS_0_375_PERCENT,
OSC_FRC_TUNE_MINUS_0_75_PERCENT,
OSC_FRC_TUNE_MINUS_1_125_PERCENT,
OSC_FRC_TUNE_MINUS_1_5_PERCENT,
OSC_FRC_TUNE_MINUS_1_875_PERCENT,
OSC_FRC_TUNE_MINUS_2_25_PERCENT,
OSC_FRC_TUNE_MINUS_2_625_PERCENT,
OSC_FRC_TUNE_MINUS_3_PERCENT
} OSC_FRC_TUNE;
Description
Oscillator tuning value enumeration
This enumeration lists the possible oscillator tuning values, and is used by the PLIB_OSC_FRCTuningSequenceValueSet and
PLIB_OSC_FRCTuningSequenceValueGet functions.
5.6 Peripheral Library Help MPLAB Harmony Help Oscillator Peripheral Library
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Members
Members Description
OSC_FRC_TUNE_PLUS_3_PERCENT OSC tune to Central frequency + 3
OSC_FRC_TUNE_PLUS_2_57_PERCENT OSC tune to Central frequency + 2.57
OSC_FRC_TUNE_PLUS_2_54_PERCENT OSC tune to Central frequency + 2.54
OSC_FRC_TUNE_PLUS_1_71_PERCENT OSC tune to Central frequency + 1.71
OSC_FRC_TUNE_PLUS_1_29_PERCENT OSC tune to Central frequency + 1.29
OSC_FRC_TUNE_PLUS_0_86_PERCENT OSC tune to Central frequency + 0.86
OSC_FRC_TUNE_PLUS_0_43_PERCENT OSC tune to Central frequency + 0.43
OSC_FRC_TUNE_CENTRAL_FREQ OSC tune to Central frequency
OSC_FRC_TUNE_MINUS_0_375_PERCENT OSC tune to Central frequency - 0.375
OSC_FRC_TUNE_MINUS_0_75_PERCENT OSC tune to Central frequency - 0.75
OSC_FRC_TUNE_MINUS_1_125_PERCENT OSC tune to Central frequency - 1.125
OSC_FRC_TUNE_MINUS_1_5_PERCENT OSC tune to Central frequency - 1.5
OSC_FRC_TUNE_MINUS_1_875_PERCENT OSC tune to Central frequency - 1.875
OSC_FRC_TUNE_MINUS_2_25_PERCENT OSC tune to Central frequency - 2.25
OSC_FRC_TUNE_MINUS_2_625_PERCENT OSC tune to Central frequency - 2.625
OSC_FRC_TUNE_MINUS_3_PERCENT OSC tune to Central frequency - 3
Remarks
None.
5.6.14.6.13.13 OSC_GFX_CLOCK Enumeration
C
typedef enum {
OSC_GFX_CLOCK_96M,
OSC_GFX_CLOCK_48M
} OSC_GFX_CLOCK;
Description
Graphics module clock values.
This enumeration lists the possible Graphics (display) module clock values.
Members
Members Description
OSC_GFX_CLOCK_96M Graphics module clock is 96 MHz
OSC_GFX_CLOCK_48M Graphics module clock is 48 MHz
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.14 OSC_LFSR_TYPE Enumeration
C
typedef enum {
OSC_LFSR
} OSC_LFSR_TYPE;
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Description
AUX PLL Input divider.
This enumeration lists the possible Auxiliary PLL input divider values.
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.15 OSC_MODULE_ID Enumeration
C
typedef enum {
OSC_ID_0
} OSC_MODULE_ID;
Description
OSC module ID
This data type defines the possible instances of the OSC module.
Members
Members Description
OSC_ID_0 first instance of the OSC
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.16 OSC_OPERATION_ON_WAIT Enumeration
C
typedef enum {
OSC_ON_WAIT_IDLE,
OSC_ON_WAIT_SLEEP
} OSC_OPERATION_ON_WAIT;
Description
Oscillator Operation on wait.
This enumeration lists the possible device status when a WAIT instruction is executed.
Members
Members Description
OSC_ON_WAIT_IDLE Idle on Wait Instruction
OSC_ON_WAIT_SLEEP Idle on Sleep Instruction
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.17 OSC_PERIPHERAL_BUS Enumeration
C
typedef enum {
OSC_PERIPHERAL_BUS_1,
OSC_PERIPHERAL_BUS_2,
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OSC_PERIPHERAL_BUS_3,
OSC_PERIPHERAL_BUS_4,
OSC_PERIPHERAL_BUS_5,
OSC_PERIPHERAL_BUS_6,
OSC_PERIPHERAL_BUS_7,
OSC_PERIPHERAL_BUS_8
} OSC_PERIPHERAL_BUS;
Description
Peripheral Buses
This enumeration lists the possible peripheral buses available in the device
Members
Members Description
OSC_PERIPHERAL_BUS_1 Peripheral bus 1
OSC_PERIPHERAL_BUS_2 Peripheral bus 2
OSC_PERIPHERAL_BUS_3 Peripheral bus 3
OSC_PERIPHERAL_BUS_4 Peripheral bus 4
OSC_PERIPHERAL_BUS_5 Peripheral bus 5
OSC_PERIPHERAL_BUS_6 Peripheral bus 6
OSC_PERIPHERAL_BUS_7 Peripheral bus 7
OSC_PERIPHERAL_BUS_8 Peripheral bus 8
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.18 OSC_PLL_SELECT Enumeration
C
typedef enum {
OSC_PLL_SYSTEM,
OSC_PLL_USB
} OSC_PLL_SELECT;
Description
Oscillator PLL selection.
This enumeration lists the available PLLs in the Oscillator module.
Members
Members Description
OSC_PLL_SYSTEM Select system PLL
OSC_PLL_USB Select USB PLL
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.19 OSC_PLLAUX_CLOCK_SOURCE Enumeration
C
typedef enum {
OSC_PLLAUX_CLOCK
} OSC_PLLAUX_CLOCK_SOURCE;
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5-2400
Description
Auxiliary PLL Clock Source
This enumeration lists the possible Auxiliary PLL clock source.
Members
Members Description
OSC_PLLAUX_CLOCK PLL Auxiliary clock
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.20 OSC_REF_BASECLOCK Enumeration
C
typedef enum {
OSC_REF_BASECLOCK_SYSCLK,
OSC_REF_BASECLOCK_PBCLK,
OSC_REF_BASECLOCK_PRIMARY,
OSC_REF_BASECLOCK_FRC,
OSC_REF_BASECLOCK_LPRC,
OSC_REF_BASECLOCK_SOSC,
OSC_REF_BASECLOCK_USBCLK,
OSC_REF_BASECLOCK_SYSPLLOUT,
OSC_REF_BASECLOCK_EXT
} OSC_REF_BASECLOCK;
Description
Base clock for reference oscillator.
This enumeration lists the possible base clock values for the reference oscillator.
Members
Members Description
OSC_REF_BASECLOCK_SYSCLK The base clock for reference clock is System clock
OSC_REF_BASECLOCK_PBCLK The base clock for reference clock is Peripheral clock
OSC_REF_BASECLOCK_PRIMARY The base clock for reference clock is Primary oscillator
OSC_REF_BASECLOCK_FRC The base clock for reference clock is FRC oscillator
OSC_REF_BASECLOCK_LPRC The base clock for reference clock is internal low power RC
OSC_REF_BASECLOCK_SOSC The base clock for reference clock is Secondary oscillator
OSC_REF_BASECLOCK_USBCLK The base clock for reference clock is USB clock
OSC_REF_BASECLOCK_SYSPLLOUT The base clock for reference clock is System PLL output
OSC_REF_BASECLOCK_EXT The base clock for reference clock is clock from external pin
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.21 OSC_REF_DIV Enumeration
C
typedef enum {
OSC_REF_DIV_1,
OSC_REF_DIV_2,
OSC_REF_DIV_4,
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OSC_REF_DIV_8,
OSC_REF_DIV_16,
OSC_REF_DIV_32,
OSC_REF_DIV_64,
OSC_REF_DIV_128,
OSC_REF_DIV_256,
OSC_REF_DIV_512,
OSC_REF_DIV_1024,
OSC_REF_DIV_2048,
OSC_REF_DIV_4096,
OSC_REF_DIV_8192,
OSC_REF_DIV_16384,
OSC_REF_DIV_32768
} OSC_REF_DIV;
Description
Reference Oscillator divisor.
This enumeration lists the possible reference oscillator divisor values.
Members
Members Description
OSC_REF_DIV_1 Reference clock is same as base clock
OSC_REF_DIV_2 Reference clock is base clock divided by 2
OSC_REF_DIV_4 Reference clock is base clock divided by 4
OSC_REF_DIV_8 Reference clock is base clock divided by 8
OSC_REF_DIV_16 Reference clock is base clock divided by 16
OSC_REF_DIV_32 Reference clock is base clock divided by 32
OSC_REF_DIV_64 Reference clock is base clock divided by 64
OSC_REF_DIV_128 Reference clock is base clock divided by 128
OSC_REF_DIV_256 Reference clock is base clock divided by 256
OSC_REF_DIV_512 Reference clock is base clock divided by 512
OSC_REF_DIV_1024 Reference clock is base clock divided by 1024
OSC_REF_DIV_2048 Reference clock is base clock divided by 2048
OSC_REF_DIV_4096 Reference clock is base clock divided by 4096
OSC_REF_DIV_8192 Reference clock is base clock divided by 8192
OSC_REF_DIV_16384 Reference clock is base clock divided by 16384
OSC_REF_DIV_32768 Reference clock is base clock divided by 32768
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.22 OSC_REFERENCE Enumeration
C
typedef enum {
OSC_REFERENCE_1,
OSC_REFERENCE_2,
OSC_REFERENCE_3,
OSC_REFERENCE_4
} OSC_REFERENCE;
Description
Reference Oscillators
5.6 Peripheral Library Help MPLAB Harmony Help Oscillator Peripheral Library
5-2402
This enumeration lists the possible reference oscillator instances available in the device
Members
Members Description
OSC_REFERENCE_1 Reference Oscillator 1
OSC_REFERENCE_2 Reference Oscillator 2
OSC_REFERENCE_3 Reference Oscillator 3
OSC_REFERENCE_4 Reference Oscillator 4
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.23 OSC_SYS_CLOCK_DIV Enumeration
C
typedef enum {
OSC_SYS_CLOCK_DIV_1,
OSC_SYS_CLOCK_DIV_2,
OSC_SYS_CLOCK_DIV_4,
OSC_SYS_CLOCK_DIV_8
} OSC_SYS_CLOCK_DIV;
Description
System Clock selection.
This enumeration lists the possible system clock divisor.
Members
Members Description
OSC_SYS_CLOCK_DIV_1 System clock divide by 1
OSC_SYS_CLOCK_DIV_2 System clock divide by 2
OSC_SYS_CLOCK_DIV_4 System clock divide by 4
OSC_SYS_CLOCK_DIV_8 System clock divide by 8
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.24 OSC_SYS_TYPE Enumeration
C
typedef enum {
OSC_FRC,
OSC_FRC_WITH_PLL,
OSC_PRIMARY,
OSC_PRIMARY_WITH_PLL,
OSC_SECONDARY,
OSC_LPRC,
OSC_FRC_DIV_BY_16,
OSC_FRC_BY_FRCDIV
} OSC_SYS_TYPE;
Description
Oscillator type.
This enumeration lists the possible oscillator type values.
5.6 Peripheral Library Help MPLAB Harmony Help Oscillator Peripheral Library
5-2403
Members
Members Description
OSC_FRC Fast RC Oscillator. This includes the 8MHz oscillator
OSC_FRC_WITH_PLL Fast RC Oscillator with PLL
OSC_PRIMARY Primary Oscillator
OSC_PRIMARY_WITH_PLL Fast RC Oscillator with PLL and PostScaler. Includes the 8MHz oscillator
OSC_SECONDARY Secondary Oscillator
OSC_LPRC Low Power RC Oscillator
OSC_FRC_DIV_BY_16 Low-Power Fast RC Oscillator with PostScaler
OSC_FRC_BY_FRCDIV Fast RC Oscillator divided by FRCDIV bits
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.25 OSC_SYSPLL_FREQ_RANGE Enumeration
C
typedef enum {
OSC_SYSPLL_FREQ_RANGE_BYPASS,
OSC_SYSPLL_FREQ_RANGE_5M_TO_10M,
OSC_SYSPLL_FREQ_RANGE_8M_TO_16M,
OSC_SYSPLL_FREQ_RANGE_13M_TO_26M,
OSC_SYSPLL_FREQ_RANGE_21M_TO_42M,
OSC_SYSPLL_FREQ_RANGE_34M_TO_68M
} OSC_SYSPLL_FREQ_RANGE;
Description
System PLL Frequency Range
This enumeration lists the possible frequency range for PLL module available in the device
Members
Members Description
OSC_SYSPLL_FREQ_RANGE_BYPASS PLL freq range bypass
OSC_SYSPLL_FREQ_RANGE_5M_TO_10M PLL frequencey range is 5MHz to 10MHz
OSC_SYSPLL_FREQ_RANGE_8M_TO_16M PLL frequencey range is 8MHz to 16MHz
OSC_SYSPLL_FREQ_RANGE_13M_TO_26M PLL frequencey range is 13MHz to 26MHz
OSC_SYSPLL_FREQ_RANGE_21M_TO_42M PLL frequencey range is 21MHz to 42MHz
OSC_SYSPLL_FREQ_RANGE_34M_TO_68M PLL frequencey range is 34MHz to 68MHz
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.26 OSC_SYSPLL_IN_CLK_SOURCE Enumeration
C
typedef enum {
OSC_SYSPLL_IN_CLK_SOURCE_FRC,
OSC_SYSPLL_IN_CLK_SOURCE_PRIMARY
} OSC_SYSPLL_IN_CLK_SOURCE;
5.6 Peripheral Library Help MPLAB Harmony Help Oscillator Peripheral Library
5-2404
Description
System PLL Input Clock Source
This enumeration lists the possible input clock source for PLL module available in the device
Members
Members Description
OSC_SYSPLL_IN_CLK_SOURCE_FRC FRC is input clock source for PLL module
OSC_SYSPLL_IN_CLK_SOURCE_PRIMARY Primary clock is the input clock source for PLL module
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.27 OSC_SYSPLL_IN_DIV Enumeration
C
typedef enum {
OSC_SYSPLL_IN_DIV_1,
OSC_SYSPLL_IN_DIV_2,
OSC_SYSPLL_IN_DIV_3,
OSC_SYSPLL_IN_DIV_4,
OSC_SYSPLL_IN_DIV_5,
OSC_SYSPLL_IN_DIV_6,
OSC_SYSPLL_IN_DIV_7,
OSC_SYSPLL_IN_DIV_8
} OSC_SYSPLL_IN_DIV;
Description
PLL Input divider.
This enumeration lists the possible PLL input divider values.
Members
Members Description
OSC_SYSPLL_IN_DIV_1 Divide by 1
OSC_SYSPLL_IN_DIV_2 Divide by 2
OSC_SYSPLL_IN_DIV_3 Divide by 4
OSC_SYSPLL_IN_DIV_4 Divide by 8
OSC_SYSPLL_IN_DIV_5 Divide by 16
OSC_SYSPLL_IN_DIV_6 Divide by 32
OSC_SYSPLL_IN_DIV_7 Divide by 64
OSC_SYSPLL_IN_DIV_8 Divide by 256
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.28 OSC_SYSPLL_OUT_DIV Enumeration
C
typedef enum {
OSC_SYSPLL_OUT_DIV_1,
OSC_SYSPLL_OUT_DIV_2,
OSC_SYSPLL_OUT_DIV_4,
OSC_SYSPLL_OUT_DIV_8,
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OSC_SYSPLL_OUT_DIV_16,
OSC_SYSPLL_OUT_DIV_32,
OSC_SYSPLL_OUT_DIV_64,
OSC_SYSPLL_OUT_DIV_256
} OSC_SYSPLL_OUT_DIV;
Description
PLL Output divider.
This enumeration lists the possible PLL output divider values.
Members
Members Description
OSC_SYSPLL_OUT_DIV_1 Divide by 1
OSC_SYSPLL_OUT_DIV_2 Divide by 2
OSC_SYSPLL_OUT_DIV_4 Divide by 4
OSC_SYSPLL_OUT_DIV_8 Divide by 8
OSC_SYSPLL_OUT_DIV_16 Divide by 16
OSC_SYSPLL_OUT_DIV_32 Divide by 32
OSC_SYSPLL_OUT_DIV_64 Divide by 64
OSC_SYSPLL_OUT_DIV_256 Divide by 256
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.13.29 OSC_TUNING_MODE Enumeration
C
typedef enum {
OSC_TUNING_USING_NUMBER,
OSC_TUNING_SEQ_DITHER,
OSC_TUNING_PSEUDO_RANDOM
} OSC_TUNING_MODE;
Description
Oscillator Tuning modes enumeration
This enumeration lists the possible oscillator tuning modes, and is used by the PLIB_OSC_FRCTuningModeSet and
PLIB_OSC_FRCTuningModeGet functions.
Members
Members Description
OSC_TUNING_USING_NUMBER FRC tuning is based on the number specified by the software. Set the number
using PLIB_OSC_FRCTuningModeSet function
OSC_TUNING_SEQ_DITHER FRC tuning is based on PWM
OSC_TUNING_PSEUDO_RANDOM FRC tuning is Pseudo-Random number generation.
Remarks
None.
5.6.14.6.13.30 OSC_TUNING_SEQUENCERS Enumeration
C
typedef enum {
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OSC_TUNING_SEQUENCER_1,
OSC_TUNING_SEQUENCER_2,
OSC_TUNING_SEQUENCER_3,
OSC_TUNING_SEQUENCER_4,
OSC_TUNING_SEQUENCER_5,
OSC_TUNING_SEQUENCER_6,
OSC_TUNING_SEQUENCER_7
} OSC_TUNING_SEQUENCERS;
Description
Oscillator sequencer entries
This enumeration lists the possible oscillator sequencers that are used by the PLIB_OSC_FRCTuningSequenceValueSet and
PLIB_OSC_FRCTuningSequenceValueGet functions to tune the FRC Oscillator.
Members
Members Description
OSC_TUNING_SEQUENCER_1 OSC tuning sequencer 1
OSC_TUNING_SEQUENCER_2 OSC tuning sequencer 2
OSC_TUNING_SEQUENCER_3 OSC tuning sequencer 3
OSC_TUNING_SEQUENCER_4 OSC tuning sequencer 4
OSC_TUNING_SEQUENCER_5 OSC tuning sequencer 5
OSC_TUNING_SEQUENCER_6 OSC tuning sequencer 6
OSC_TUNING_SEQUENCER_7 OSC tuning sequencer 7
Remarks
None.
5.6.14.6.13.31 OSC_USBCLOCK_SOURCE Enumeration
C
typedef enum {
SYS_OSC_USBCLK_PRIMARY,
SYS_OSC_USBCLK_FRC
} OSC_USBCLOCK_SOURCE;
Description
USB clock sources.
This enumeration lists the the possible USB clock sources.
Members
Members Description
SYS_OSC_USBCLK_PRIMARY USB clock source is primary oscillator
SYS_OSC_USBCLK_FRC USB clock source isFRC oscillator
Remarks
This enumeration is processor specific and is defined in the processor- specific header files.
5.6.14.6.14 Feature Existence Functions
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5-2407
5.6.14.6.14.1 PLIB_OSC_ExistsClockFail Function
C
bool PLIB_OSC_ExistsClockFail(
OSC_MODULE_ID index
);
Description
This function identifies whether the ClockFail feature is available on the OSC module. When this function returns true, these
functions are supported on the device:
• PLIB_OSC_ClockHasFailed
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ClockFail feature is supported on the device
• false - If the ClockFail feature is not supported on the device
Remarks
None.
5.6.14.6.14.2 PLIB_OSC_ExistsFRCDivisor Function
C
bool PLIB_OSC_ExistsFRCDivisor(
OSC_MODULE_ID index
);
Description
This function identifies whether the FRCDivisor feature is available on the OSC module. When this function returns true, these
functions are supported on the device:
• PLIB_OSC_FRCDivisorSelect
• PLIB_OSC_FRCDivisorGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the FRCDivisor feature is supported on the device
• false - If the FRCDivisor feature is not supported on the device
Remarks
None.
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5.6.14.6.14.3 PLIB_OSC_ExistsFRCTuning Function
C
bool PLIB_OSC_ExistsFRCTuning(
OSC_MODULE_ID index
);
Description
This function identifies whether the FRCTuning feature is available on the OSC module. When this function returns true, these
functions are supported on the device:
• PLIB_OSC_FRCTuningSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the FRCTuning feature is supported on the device
• false - If the FRCTuning feature is not supported on the device
Remarks
None.
5.6.14.6.14.4 PLIB_OSC_ExistsOnWaitAction Function
C
bool PLIB_OSC_ExistsOnWaitAction(
OSC_MODULE_ID index
);
Description
This function identifies whether the OnWaitAction feature is available on the OSC module. When this function returns true, these
functions are supported on the device:
• PLIB_OSC_OnWaitActionSet
• PLIB_OSC_OnWaitActionGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the OnWaitAction feature is supported on the device
• false - If the OnWaitAction feature is not supported on the device
Remarks
None.
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5.6.14.6.14.5 PLIB_OSC_ExistsOscCurrentGet Function
C
bool PLIB_OSC_ExistsOscCurrentGet(
OSC_MODULE_ID index
);
Description
This function identifies whether the OscCurrentGet feature is available on the OSC module. When this function returns true,
these functions are supported on the device:
• PLIB_OSC_CurrentSysClockGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the OscCurrentGet feature is supported on the device
• false - If the OscCurrentGet feature is not supported on the device
Remarks
None.
5.6.14.6.14.6 PLIB_OSC_ExistsOscSelect Function
C
bool PLIB_OSC_ExistsOscSelect(
OSC_MODULE_ID index
);
Description
This function identifies whether the OscSelect feature is available on the OSC module. When this function returns true, these
functions are supported on the device:
• PLIB_OSC_SysClockSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the OscSelect feature is supported on the device
• false - If the OscSelect feature is not supported on the device
Remarks
None.
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5.6.14.6.14.7 PLIB_OSC_ExistsOscSwitchInit Function
C
bool PLIB_OSC_ExistsOscSwitchInit(
OSC_MODULE_ID index
);
Description
This function identifies whether the OscSwitchInit feature is available on the OSC module. When this function returns true, these
functions are supported on the device:
• PLIB_OSC_ClockSwitchingAbort
• PLIB_OSC_ClockSwitchingIsComplete
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the OscSwitchInit feature is supported on the device
• false - If the OscSwitchInit feature is not supported on the device
Remarks
None.
5.6.14.6.14.8 PLIB_OSC_ExistsPBClockDivisor Function
C
bool PLIB_OSC_ExistsPBClockDivisor(
OSC_MODULE_ID index
);
Description
This function identifies whether the PBClockDivisor feature is available on the OSC module. When this function returns true,
these functions are supported on the device:
• PLIB_OSC_PBClockDivisorGet
• PLIB_OSC_PBClockDivisorSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PBClockDivisor feature is supported on the device
• false - If the PBClockDivisor feature is not supported on the device
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Remarks
None.
5.6.14.6.14.9 PLIB_OSC_ExistsPBClockOutputEnable Function
C
bool PLIB_OSC_ExistsPBClockOutputEnable(
OSC_MODULE_ID index
);
Description
This function identifies whether the PBClockOutputEnable feature is available on the OSC module. When this function returns
true, these functions are supported on the device:
• PLIB_OSC_PBOutputClockEnable
• PLIB_OSC_PBOutputClockDisable
• PLIB_OSC_PBOutputClockIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PBClockOutputEnable feature is supported on the device
• false - If the PBClockOutputEnable feature is not supported on the device
Remarks
None.
5.6.14.6.14.10 PLIB_OSC_ExistsPBClockReady Function
C
bool PLIB_OSC_ExistsPBClockReady(
OSC_MODULE_ID index
);
Description
This function identifies whether the PBClockReady feature is available on the OSC module. When this function returns true,
these functions are supported on the device:
• PLIB_OSC_PBClockDivisorIsReady
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - If the PBClockReady feature is supported on the device
• false - If the PBClockReady feature is not supported on the device
Remarks
None.
5.6.14.6.14.11 PLIB_OSC_ExistsPLLClockLock Function
C
bool PLIB_OSC_ExistsPLLClockLock(
OSC_MODULE_ID index
);
Description
This function identifies whether the PLLClockLock feature is available on the OSC module. When this function returns true, these
functions are supported on the device:
• PLIB_OSC_PLLClockLock
• PLIB_OSC_PLLClockUnlock
• PLIB_OSC_PLLClockIsLocked
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PLLClockLock feature is supported on the device
• false - If the PLLClockLock feature is not supported on the device
Remarks
None.
5.6.14.6.14.12 PLIB_OSC_ExistsPLLLockStatus Function
C
bool PLIB_OSC_ExistsPLLLockStatus(
OSC_MODULE_ID index
);
Description
This function identifies whether the PLLLockStatus feature is available on the OSC module. When this function returns true,
these functions are supported on the device:
• PLIB_OSC_PLLIsLocked
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PLLLockStatus feature is supported on the device
• false - If the PLLLockStatus feature is not supported on the device
Remarks
None.
5.6.14.6.14.13 PLIB_OSC_ExistsReferenceOscBaseClock Function
C
bool PLIB_OSC_ExistsReferenceOscBaseClock(
OSC_MODULE_ID index
);
Description
This function identifies whether the ReferenceOscBaseClock feature is available on the OSC module. When this function returns
true, these functions are supported on the device:
• PLIB_OSC_ReferenceOscBaseClockSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReferenceOscBaseClock feature is supported on the device
• false - If the ReferenceOscBaseClock feature is not supported on the device
Remarks
None.
5.6.14.6.14.14 PLIB_OSC_ExistsReferenceOscChange Function
C
bool PLIB_OSC_ExistsReferenceOscChange(
OSC_MODULE_ID index
);
Description
This function identifies whether the ReferenceOscChange feature is available on the OSC module. When this function returns
true, these functions are supported on the device:
• PLIB_OSC_ReferenceOscSwitchIsComplete
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReferenceOscChange feature is supported on the device
• false - If the ReferenceOscChange feature is not supported on the device
Remarks
None.
5.6.14.6.14.15 PLIB_OSC_ExistsReferenceOscChangeActive Function
C
bool PLIB_OSC_ExistsReferenceOscChangeActive(
OSC_MODULE_ID index
);
Description
This function identifies whether the ReferenceOscChangeActive feature is available on the OSC module. When this function
returns true, these functions are supported on the device:
• PLIB_OSC_ReferenceOscSourceChangeIsActive
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReferenceOscChangeActive feature is supported on the device
• false - If the ReferenceOscChangeActive feature is not supported on the device
Remarks
None.
5.6.14.6.14.16 PLIB_OSC_ExistsReferenceOscDivisor Function
C
bool PLIB_OSC_ExistsReferenceOscDivisor(
OSC_MODULE_ID index
);
Description
This function identifies whether the ReferenceOscDivisor feature is available on the OSC module. When this function returns
true, these functions are supported on the device:
• PLIB_OSC_ReferenceOscDivisorValueSet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReferenceOscDivisor feature is supported on the device
• false - If the ReferenceOscDivisor feature is not supported on the device
Remarks
None.
5.6.14.6.14.17 PLIB_OSC_ExistsReferenceOscEnable Function
C
bool PLIB_OSC_ExistsReferenceOscEnable(
OSC_MODULE_ID index
);
Description
This function identifies whether the ReferenceOscEnable feature is available on the OSC module. When this function returns
true, these functions are supported on the device:
• PLIB_OSC_ReferenceOscEnable
• PLIB_OSC_ReferenceOscDisable
• PLIB_OSC_ReferenceOscIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReferenceOscEnable feature is supported on the device
• false - If the ReferenceOscEnable feature is not supported on the device
Remarks
None.
5.6.14.6.14.18 PLIB_OSC_ExistsReferenceOscStopInIdleEnable Function
C
bool PLIB_OSC_ExistsReferenceOscStopInIdleEnable(
OSC_MODULE_ID index
);
Description
This function identifies whether the ReferenceOscStopInIdleEnable feature is available on the OSC module. When this function
returns true, these functions are supported on the device:
• PLIB_OSC_ReferenceOscStopInIdleEnable
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• PLIB_OSC_ReferenceOscStopInIdleDisable
• PLIB_OSC_ReferenceOscStopInIdleIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReferenceOscStopInIdleEnable feature is supported on the device
• false - If the ReferenceOscStopInIdleEnable feature is not supported on the device
Remarks
None.
5.6.14.6.14.19 PLIB_OSC_ExistsReferenceOscStopInSleep Function
C
bool PLIB_OSC_ExistsReferenceOscStopInSleep(
OSC_MODULE_ID index
);
Description
This function identifies whether the ReferenceOscStopInSleep feature is available on the OSC module. When this function
returns true, these functions are supported on the device:
• PLIB_OSC_ReferenceOscStopInSleepEnable
• PLIB_OSC_ReferenceOscStopInSleepDisable
• PLIB_OSC_ReferenceOscStopInSleepIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReferenceOscStopInSleep feature is supported on the device
• false - If the ReferenceOscStopInSleep feature is not supported on the device
Remarks
None.
5.6.14.6.14.20 PLIB_OSC_ExistsReferenceOscTrim Function
C
bool PLIB_OSC_ExistsReferenceOscTrim(
OSC_MODULE_ID index
);
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Description
This function identifies whether the ReferenceOscTrim feature is available on the OSC module. When this function returns true,
these functions are supported on the device:
• PLIB_OSC_ReferenceOscTrimSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReferenceOscTrim feature is supported on the device
• false - If the ReferenceOscTrim feature is not supported on the device
Remarks
None.
5.6.14.6.14.21 PLIB_OSC_ExistsReferenceOutputEnable Function
C
bool PLIB_OSC_ExistsReferenceOutputEnable(
OSC_MODULE_ID index
);
Description
This function identifies whether the ReferenceOutputEnable feature is available on the OSC module. When this function returns
true, these functions are supported on the device:
• PLIB_OSC_ReferenceOutputEnable
• PLIB_OSC_ReferenceOutputDisable
• PLIB_OSC_ReferenceOutputIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the ReferenceOutputEnable feature is supported on the device
• false - If the ReferenceOutputEnable feature is not supported on the device
Remarks
None.
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5.6.14.6.14.22 PLIB_OSC_ExistsSecondaryEnable Function
C
bool PLIB_OSC_ExistsSecondaryEnable(
OSC_MODULE_ID index
);
Description
This function identifies whether the SecondaryEnable feature is available on the OSC module. When this function returns true,
these functions are supported on the device:
• PLIB_OSC_SecondaryEnable
• PLIB_OSC_SecondaryDisable
• PLIB_OSC_SecondaryIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SecondaryEnable feature is supported on the device
• false - If the SecondaryEnable feature is not supported on the device
Remarks
None.
5.6.14.6.14.23 PLIB_OSC_ExistsSecondaryReady Function
C
bool PLIB_OSC_ExistsSecondaryReady(
OSC_MODULE_ID index
);
Description
This function identifies whether the SecondaryReady feature is available on the OSC module. When this function returns true,
these functions are supported on the device:
• PLIB_OSC_SecondaryIsReady
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the SecondaryReady feature is supported on the device
• false - If the SecondaryReady feature is not supported on the device
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Remarks
None.
5.6.14.6.14.24 PLIB_OSC_ExistsSysPLLFrequencyRange Function
C
bool PLIB_OSC_ExistsSysPLLFrequencyRange(
OSC_MODULE_ID index
);
Description
This function identifies whether the PLLFrequencyRange feature is available on the OSC module. When this function returns
true, these functions are supported on the device:
• PLIB_OSC_SysPLLFrequencyRangeSet
• PLIB_OSC_SysPLLFrequencyRangeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PLLFrequencyRange feature is supported on the device
• false - If the PLLFrequencyRange feature is not supported on the device
Remarks
None.
5.6.14.6.14.25 PLIB_OSC_ExistsSysPLLInputClockSource Function
C
bool PLIB_OSC_ExistsSysPLLInputClockSource(
OSC_MODULE_ID index
);
Description
This function identifies whether the PLLInputClockSource feature is available on the OSC module. When this function returns
true, these functions are supported on the device:
• PLIB_OSC_SysPLLInputClockSourceSet
• PLIB_OSC_SysPLLInputClockSourceGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - If the PLLInputClockSource feature is supported on the device
• false - If the PLLInputClockSource feature is not supported on the device
Remarks
None.
5.6.14.6.14.26 PLIB_OSC_ExistsSysPLLInputDivisor Function
C
bool PLIB_OSC_ExistsSysPLLInputDivisor(
OSC_MODULE_ID index
);
Description
This function identifies whether the PLLInputDivisor feature is available on the OSC module. When this function returns true,
these functions are supported on the device:
• PLIB_OSC_SysPLLInputDivisorSet
• PLIB_OSC_SysPLLInputDivisorGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PLLInputDivisor feature is supported on the device
• false - If the PLLInputDivisor feature is not supported on the device
Remarks
None.
5.6.14.6.14.27 PLIB_OSC_ExistsSysPLLMultiplier Function
C
bool PLIB_OSC_ExistsSysPLLMultiplier(
OSC_MODULE_ID index
);
Description
This function identifies whether the PLLMultiplier feature is available on the OSC module. When this function returns true, these
functions are supported on the device:
• PLIB_OSC_SysPLLMultiplierSelect
• PLIB_OSC_SysPLLMultiplierGet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PLLMultiplier feature is supported on the device
• false - If the PLLMultiplier feature is not supported on the device
Remarks
None.
5.6.14.6.14.28 PLIB_OSC_ExistsSysPLLOutputDivisor Function
C
bool PLIB_OSC_ExistsSysPLLOutputDivisor(
OSC_MODULE_ID index
);
Description
This function identifies whether the PLLOutputDivisor feature is available on the OSC module. When this function returns true,
these functions are supported on the device:
• PLIB_OSC_SysPLLOutputDivisorSet
• PLIB_OSC_SysPLLOutputDivisorGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the PLLOutputDivisor feature is supported on the device
• false - If the PLLOutputDivisor feature is not supported on the device
Remarks
None.
5.6.14.6.14.29 PLIB_OSC_ExistsUsbClockSource Function
C
bool PLIB_OSC_ExistsUsbClockSource(
OSC_MODULE_ID index
);
Description
This function identifies whether the UsbClockSource feature is available on the OSC module. When this function returns true,
these functions are supported on the device:
• PLIB_OSC_UsbClockSourceSelect
• PLIB_OSC_UsbClockSourceGet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - If the UsbClockSource feature is supported on the device
• false - If the UsbClockSource feature is not supported on the device
Remarks
None.
5.6.14.7 Files
Files
Name Description
plib_osc.h Defines the Oscillator (OSC) Peripheral Library interface.
Description
5.6.14.7.1 plib_osc.h
Oscillator Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Oscillator (OSC) Peripheral Library for Microchip microcontrollers. The definitions in this file are for the Oscillator module.
Functions
Name Description
PLIB_OSC_AuxClockSourceGet Gets the clock source for the auxiliary clock.
PLIB_OSC_AuxClockSourceSet Sets the clock source for the auxiliary clock divisor.
PLIB_OSC_AuxModeGet Gets the selected Auxiliary Oscillator mode.
PLIB_OSC_AuxModeSelect Selects the Auxiliary Oscillator mode.
PLIB_OSC_ClockHasFailed Returns 'true' if the clock fails.
PLIB_OSC_ClockSwitchingAbort Aborts an oscillator switch.
PLIB_OSC_ClockSwitchingIsComplete Gets the oscillator switch progress status.
PLIB_OSC_CurrentSysClockGet Gets the current oscillator selected.
PLIB_OSC_DozeModeDisable Disables Doze mode.
PLIB_OSC_DozeModeEnable Enables Doze mode.
PLIB_OSC_DozeRatioGet Gets the ratio of the processor clock to the peripheral clock.
PLIB_OSC_DozeRatioSelect Selects the Doze ratio of the processor clock to the peripheral
clock.
PLIB_OSC_DozeRecoverOnInterruptDisable Disables the recovery from Doze mode upon an interrupt.
PLIB_OSC_DozeRecoverOnInterruptEnable Enables recovery from Doze mode upon an interrupt.
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PLIB_OSC_DozeRecoverOnInterruptIsEnabled Returns 'true' if recover from Doze mode on interrupt is enabled.
PLIB_OSC_ExistsClockFail Identifies whether the ClockFail feature exists on the OSC
module
PLIB_OSC_ExistsFRCDivisor Identifies whether the FRCDivisor feature exists on the OSC
module
PLIB_OSC_ExistsFRCTuning Identifies whether the FRCTuning feature exists on the OSC
module
PLIB_OSC_ExistsOnWaitAction Identifies whether the OnWaitAction feature exists on the OSC
module
PLIB_OSC_ExistsOscCurrentGet Identifies whether the OscCurrentGet feature exists on the OSC
module
PLIB_OSC_ExistsOscSelect Identifies whether the OscSelect feature exists on the OSC
module
PLIB_OSC_ExistsOscSwitchInit Identifies whether the OscSwitchInit feature exists on the OSC
module
PLIB_OSC_ExistsPBClockDivisor Identifies whether the PBClockDivisor feature exists on the
OSC module
PLIB_OSC_ExistsPBClockOutputEnable Identifies whether the PBClockOutputEnable feature exists on
the OSC module
PLIB_OSC_ExistsPBClockReady Identifies whether the PBClockReady feature exists on the OSC
module
PLIB_OSC_ExistsPLLClockLock Identifies whether the PLLClockLock feature exists on the OSC
module
PLIB_OSC_ExistsPLLLockStatus Identifies whether the PLLLockStatus feature exists on the OSC
module
PLIB_OSC_ExistsReferenceOscBaseClock Identifies whether the ReferenceOscBaseClock feature exists
on the OSC module
PLIB_OSC_ExistsReferenceOscChange Identifies whether the ReferenceOscChange feature exists on
the OSC module
PLIB_OSC_ExistsReferenceOscChangeActive Identifies whether the ReferenceOscChangeActive feature
exists on the OSC module
PLIB_OSC_ExistsReferenceOscDivisor Identifies whether the ReferenceOscDivisor feature exists on
the OSC module
PLIB_OSC_ExistsReferenceOscEnable Identifies whether the ReferenceOscEnable feature exists on
the OSC module
PLIB_OSC_ExistsReferenceOscStopInIdleEnable Identifies whether the ReferenceOscStopInIdleEnable feature
exists on the OSC module
PLIB_OSC_ExistsReferenceOscStopInSleep Identifies whether the ReferenceOscStopInSleep feature exists
on the OSC module
PLIB_OSC_ExistsReferenceOscTrim Identifies whether the ReferenceOscTrim feature exists on the
OSC module
PLIB_OSC_ExistsReferenceOutputEnable Identifies whether the ReferenceOutputEnable feature exists on
the OSC module
PLIB_OSC_ExistsSecondaryEnable Identifies whether the SecondaryEnable feature exists on the
OSC module
PLIB_OSC_ExistsSecondaryReady Identifies whether the SecondaryReady feature exists on the
OSC module
PLIB_OSC_ExistsSysPLLFrequencyRange Identifies whether the PLLFrequencyRange feature exists on
the OSC module
PLIB_OSC_ExistsSysPLLInputClockSource Identifies whether the PLLInputClockSource feature exists on
the OSC module
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PLIB_OSC_ExistsSysPLLInputDivisor Identifies whether the PLLInputDivisor feature exists on the
OSC module
PLIB_OSC_ExistsSysPLLMultiplier Identifies whether the PLLMultiplier feature exists on the OSC
module
PLIB_OSC_ExistsSysPLLOutputDivisor Identifies whether the PLLOutputDivisor feature exists on the
OSC module
PLIB_OSC_ExistsUsbClockSource Identifies whether the UsbClockSource feature exists on the
OSC module
PLIB_OSC_FRCDitherEnable Enables the FRC Oscillator clock dithering.
PLIB_OSC_FRCDivisorGet Gets the FRC clock divisor.
PLIB_OSC_FRCDivisorSelect Sets the FRC clock divisor to the specified value.
PLIB_OSC_FRCTuningModeGet Gets the FRC oscillator tuning mode.
PLIB_OSC_FRCTuningModeSet Selects the FRC oscillator tuning mode.
PLIB_OSC_FRCTuningSelect Sets the FRC tuning value.
PLIB_OSC_FRCTuningSequenceValueGet Gets the value set in the FRC tune sequencer.
PLIB_OSC_FRCTuningSequenceValueSet Sets the value in the FRC tune sequencer.
PLIB_OSC_GraphicsClockDivisorGet Gets the Graphics module clock divisor.
PLIB_OSC_GraphicsClockDivisorSet Sets the Graphics module clock divisor.
PLIB_OSC_GraphicsClockSourceGet Gets the Graphics Controller module clock frequency value.
PLIB_OSC_GraphicsClockSourceSelect Sets the Graphics Controller module clock.
PLIB_OSC_LinearFeedbackShiftRegGet Gets the value from linear feedback shift register.
PLIB_OSC_LinearFeedbackShiftRegSet Sets the linear feedback shift register.
PLIB_OSC_OnWaitActionGet Gets the configured operation to be performed when a WAIT
instruction is executed.
PLIB_OSC_OnWaitActionSet Selects the operation to be performed when a WAIT instruction
is executed.
PLIB_OSC_PBClockDivisorGet Gets the peripheral bus clock divisor.
PLIB_OSC_PBClockDivisorIsReady Checks whether the peripheral bus clock divisor is ready to be
written.
PLIB_OSC_PBClockDivisorSet Sets the peripheral bus clock divisor to the specified value.
PLIB_OSC_PBOutputClockDisable Disables the peripheral bus output clock
PLIB_OSC_PBOutputClockEnable Enables the peripheral bus output clock
PLIB_OSC_PBOutputClockIsEnabled Checks whether the peripheral bus clock output is enabled or
not
PLIB_OSC_PLLAuxClockSourceGet Returns the clock source selected for the Auxiliary PLL.
PLIB_OSC_PLLAuxClockSourceSelect Sets the Auxiliary PLL clock source.
PLIB_OSC_PLLAuxInputDivisorGet Gets the input divisor for the Auxiliary PLL.
PLIB_OSC_PLLAuxInputDivisorSelect Sets the input divisor for the Auxiliary PLL to the specified value.
PLIB_OSC_PLLAuxIsLocked Returns whether the Auxiliary PLL is locked.
PLIB_OSC_PLLAuxMultiplierGet Gets the Auxiliary PLL multiplier.
PLIB_OSC_PLLAuxMultiplierSelect Sets the Auxiliary PLL multiplier to the specified value.
PLIB_OSC_PLLAuxOutputDivisorGet Gets the output divisor for the Auxiliary PLL.
PLIB_OSC_PLLAuxOutputDivisorSet Sets the output divisor for the Auxiliary PLL to the specified
value.
PLIB_OSC_PLLClockIsLocked Gets the lock status for the clock and PLL selections.
PLIB_OSC_PLLClockLock Locks the clock and PLL selections.
PLIB_OSC_PLLClockUnlock Unlocks the clock and PLL selections.
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PLIB_OSC_PLLDisable Disables the specified PLL.
PLIB_OSC_PLLEnable Enables the specified PLL.
PLIB_OSC_PLLIsEnabled Returns 'true' if the specified PLL is enabled.
PLIB_OSC_PLLIsLocked Returns 'true' if the selected PLL is locked.
PLIB_OSC_PrimaryOscInSleepModeDisable The Primary Oscillator is disabled during Sleep mode.
PLIB_OSC_PrimaryOscInSleepModeEnable The Primary Oscillator continues to operate during Sleep mode.
PLIB_OSC_PrimaryOscInSleepModeIsEnabled Returns 'true' if the Primary Oscillator is disabled during Sleep
mode.
PLIB_OSC_ReferenceOscBaseClockSelect Sets the base clock for the reference oscillator.
PLIB_OSC_ReferenceOscDisable Disables the reference oscillator output.
PLIB_OSC_ReferenceOscDivisorValueSet Selects the reference oscillator divisor value.
PLIB_OSC_ReferenceOscEnable Enables the reference oscillator.
PLIB_OSC_ReferenceOscIsEnabled Gets the enable status of the reference oscillator output.
PLIB_OSC_ReferenceOscSourceChangeIsActive Returns 'true' if a reference oscillator source change request is
active.
PLIB_OSC_ReferenceOscStopInIdleDisable Enables the reference oscillator in Idle mode.
PLIB_OSC_ReferenceOscStopInIdleEnable Configures the reference oscillator to stop operating in Idle
mode.
PLIB_OSC_ReferenceOscStopInIdleIsEnabled Returns 'true' if the reference oscillator is disabled in Idle mode.
PLIB_OSC_ReferenceOscStopInSleepDisable Enables the reference oscillator in Sleep mode.
PLIB_OSC_ReferenceOscStopInSleepEnable Configures the reference oscillator to stop operating in Sleep
mode.
PLIB_OSC_ReferenceOscStopInSleepIsEnabled Returns 'true' if the reference oscillator is disabled in Sleep
mode.
PLIB_OSC_ReferenceOscSwitchIsComplete Returns 'true' if the reference oscillator base clock switching is
complete.
PLIB_OSC_ReferenceOscTrimSet Sets the reference oscillator divisor trim value.
PLIB_OSC_ReferenceOutputDisable Disables the reference oscillator output.
PLIB_OSC_ReferenceOutputEnable Enables the reference oscillator output.
PLIB_OSC_ReferenceOutputIsEnabled Returns 'true' if the reference oscillator output is enabled.
PLIB_OSC_SecondaryDisable Disables the Secondary Oscillator.
PLIB_OSC_SecondaryEnable Enables the Secondary Oscillator.
PLIB_OSC_SecondaryIsEnabled Returns 'true' if the Secondary Oscillator is enabled.
PLIB_OSC_SecondaryIsReady Returns 'true' if the Secondary Oscillator is ready.
PLIB_OSC_StartupTimerHasExpired Returns 'true' if the oscillator start-up time-out timer has expired.
PLIB_OSC_SysClockSelect Selects the new oscillator.
PLIB_OSC_SysPLLFrequencyRangeGet Returns the frequence range for PLL
PLIB_OSC_SysPLLFrequencyRangeSet Sets the frequence range for PLL
PLIB_OSC_SysPLLInputClockSourceGet Returns the input clock source for the PLL module
PLIB_OSC_SysPLLInputClockSourceSet Sets the input clock source for the PLL module
PLIB_OSC_SysPLLInputDivisorGet Gets the input divisor for the PLL.
PLIB_OSC_SysPLLInputDivisorSet Sets the input divider for the PLL to the specified value.
PLIB_OSC_SysPLLMultiplierGet Gets the PLL multiplier.
PLIB_OSC_SysPLLMultiplierSelect Sets the PLL multiplier to the specified value.
PLIB_OSC_SysPLLOutputDivisorGet Gets the output divisor for the PLL.
PLIB_OSC_SysPLLOutputDivisorSet Sets the output divider for the PLL to the specified value.
PLIB_OSC_UsbClockSourceGet Gets the USB module clock source.
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PLIB_OSC_UsbClockSourceSelect Sets the USB module clock source.
File Name
plib_osc.h
Company
Microchip Technology Inc.
5.6.15 Prefetch Cache Peripheral Library
5.6.15.1 Introduction
Prefetch Cache Module Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Prefetch Cache module on Microchip microcontrollers with a convenient C
language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the
module's registers, thereby hiding differences from one microcontroller variant to another.
Description
Prefetch Cache Module Overview
The Prefetch Cache module increases system performance for most applications by:
• Predictive prefetching of instructions ahead of the current program counter, hiding the access time of the Flash memory
• Instruction and data caching
The program Flash memory (PFM) contains a Prefetch module and a number of cache lines, each containing four words. Some
of the cache lines may be allocated to data or peripherals. Each cache line has an associated tag. The tag contains the address
of the data in the cache line, and a number of status bits. The number of cache lines and number and type of status bits may
vary between devices. Refer to your specific device data sheet for details.
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5.6.15.2 Release Notes
MPLAB Harmony Version: v0.70b Prefetch Cache Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.15.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.15.4 Using the Library
This topic describes the basic architecture of the Prefetch Cache Peripheral Library and provides information and examples on
how to use it.
Interface Header File: peripheral.h
The interface to the Prefetch Cache Peripheral Library is defined in the "plib_pcache.h" header file, which is included by the
"peripheral.h" peripheral library header file. Any C language source (.c) file that uses the Prefetch Cache Peripheral Library must
include "peripheral.h".
Library File:
The Prefetch Cache Peripheral Library is part of the processor-specific peripheral library archive (.a) file installed with the
compiler. Libraries in this archive are automatically available to the linker (in the default search path) for any project built using
the Microchip compiler.
5.6.15.4.1 Library Architecture
The cache consists of two arrays: tag and data. The data array contains a number of lines of program instructions or data words.
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The word size is the same as the processor data width.
The tag array contains a number of corresponding fields, each containing:
• Mask – address mask value
• Tag – tag address to match against
• Valid – indicates whether the data in the cache line is valid or not
• Lock – indicates the line is locked to hold its contents
• Type – instruction, data or peripheral
Note: Not all Tag fields are available on all devices. The number of cache lines may vary between devices. Refer to the specific
device data sheet for details.
Example Cache Line
This library allows the programmer to perform various operations on the cache tag and data arrays:
• Enable/Disable
• Set the Wait state
• Read, write, lock, invalidate
Note: Not all operations are available on all devices. Refer to the specific device data sheet for details.
5.6.15.4.2 Hardware Abstraction Model
This library provides a low-level abstraction of the Prefetch Cache module on Microchip family microcontrollers with a convenient
C language interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
Description
Hardware Abstraction Model
The Prefetch Cache module is a performance enhancing module included in some microcontrollers. When running at high clock
rates, wait states must be inserted into program Flash memory (PFM) read transactions to meet the access time of the PFM.
Wait states can be hidden to the core by prefetching and storing instructions in a temporary holding area that the CPU can
access quickly.
There are two main functions that the Prefetch Cache module performs: Caching instructions when they are accessed, and
prefetching instructions from the PFM before they are needed.
The cache holds a subset of the cacheable memory in temporary holding spaces known as cache lines. Each cache line has a
tag describing what it is currently holding, and the address where it is mapped. Normally, the cache lines just hold a copy of what
is currently in memory to make data available to the CPU without wait states.
CPU-requested data may or may not be in the cache. A cache-miss occurs if the CPU requests cacheable data that is not in the
cache. In this case, a read is performed to the PFM at the correct address, the data is supplied to the cache and to the CPU. A
cache-hit occurs if the cache contains the data that the CPU requests. In the case of a cache-hit, data is supplied to the CPU
without wait states.
The second main function of the Prefetch Cache module is to prefetch CPU instructions. The module calculates the address of
the next cache line and performs a read of the PFM to get the next cache line. This line is placed into a prefetch cache buffer in
anticipation of executing straight-line code.
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Cache Control
This library provides a set of functions to control the behavior of the overall Cache Module. Those functions include:
• Setting or reading the number of clock wait cycles
• Setting or reading the number of cache lines allocated to data
• Controlling which cache lines are invalidated on a PFM write cycle
Cache Line Operations
This library provides a set of functions to read, write and control the behavior of individual Cache Lines. Operations on individual
Cache Lines are performed using a two-step process:
1. Select the individual cache line with PLIB_PCACHE_CacheLineSelect.
2. Perform the required cache line operation using any of the routines in the "Cache Line Operations" section. The operations
available are:
• Set the cache line to data or instruction type
• Mark the cache line as valid or invalid
• Lock or unlock the cache line
• Read or write the Flash type (boot or program) associated with the cache line
• Read or write the address associated with the cache line
• Read or write the mask field to force a match between the cache line and multiple physical addresses
• Read or write any individual word in the cache line data array
Once the operation is performed, the cache line remains selected until PLIB_PCACHE_CacheLineDeselect is performed. Only
one cache line can be selected at a time.
Cache Status
The cache maintains a count of hits and misses for profiling purposes. The cache hit counter increments each time the processor
issues an instruction fetch or load that hits the prefetch cache from a cacheable region. Similarly, the cache miss counter
increments each time the processor issues an instruction fetch or load that misses the prefetch cache from a cacheable region.
Accesses to non-cacheable regions do not affect the counters. These values can be read or written using the Cache Status
routines.
The cache uses a Least Recently Used (LRU) algorithm to replace cache lines on a miss. The specific algorithm may vary
between devices. In some devices, the state of the LRU algorithm encoding bits can be read with
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PLIB_PCACHE_LeastRecentlyUsedStateRead.
Prefetch Control
Predictive prefetch is controlled by the Prefetch Control routines. Devices with no L1 CPU cache can prefetch from cacheable or
non-cacheable regions or both. Devices with L1 CPU cache can prefetch from any address, CPU instructions or CPU
instructions and data. Predictive prefetch can be disabled for either type of device.
Prefetch Status
The Prefetch Cache module maintains a count of prefetch aborts for profiling purposes. The prefetch abort counter is
incremented each time a prefetch is aborted due to a non-sequential instruction fetch, load or store. This value can be read or
written using the Prefetch Status routines.
Flash ECC
On some devices, the Flash ECC module has the ability to detect single and double bit errors on PFM reads. When a single bit
error is detected, the error is corrected and the Single Error Correction (SEC) counter is decremented. When the SEC counter
reaches zero, an interrupt is generated to the CPU. The user has the ability to enable or disable the SEC interrupt. It is disabled
by default. The user may set the SEC counter value at any time. The maximum counter value may be device-specific and is
defined for each processor by the PLIB_PCACHE_MAX_SEC_COUNT constant.
When a double bit error is detected, the device will set the DED status to true and generate a bus exception to the initiator.
5.6.15.4.3 How the Library Works
This library can be used to optimize the performance of the processor while executing out of cacheable program Flash memory.
This is done by implementing the following:
• Instruction caching
• Data caching
• Cache line control
• Predictive prefetching
• ECC detection
5.6.15.4.3.1 Cache Control Operations
Cache Wait States
When operating at high clock rates, the Prefetch Cache module must insert wait states into Program Flash Memory (PFM) read
operations to meet PFM access time requirements. One Wait state is equivalent to one clock cycle delay. At reset, the Prefetch
Cache Module is set to the maximum number of wait states for the device. The PFM read time can be optimized for the device
by selecting the minimum number of wait states for the clock rate used. The number of wait states for a given clock frequency
may vary between devices.
Note: Refer to the specific device data sheet for details on how to calculate the optimum number of wait states for your device.
Example: Setting the Number of PFM wait states based on the System Clock
This example assumes one wait state for every 20 MHz of system clock.
if (sysclk < 20000000)
{
PLIB_PCACHE_WaitStateSet(0);
}
else if (sysclk < 40000000)
{
PLIB_PCACHE_WaitStateSet(1);
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}
...
Data Caching
Some Prefetch Cache modules allow the user to allocate cache lines to data. This is to provide improved CPU access to
constant data stored in PFM. By default, data caching is disabled. The Prefetch Cache Peripheral Library allows the user to set
the number of cache lines allocated to data. The number of lines available may vary among devices. The available settings are
provided by the device-dependent PLIB_PCACHE_DATA_ENABLE enumeration.
Example: Allocating two Cache Lines to Data
PLIB_PCACHE_DataCacheEnableSet(PLIB_PCACHE_DATA_2LINE);
Cache Line Invalidating on PFM Write
It's not possible to execute out of cache while programming the PFM. The PFM controller stalls the cache during the
programming sequence. Therefore, user code that initiates a programming sequence should not be located in a cacheable
address region.
During program operation, the Prefetch Cache is flushed by invalidating some or all of the cache lines. To invalidate all of the
cache lines on a PFM write operation, the function PLIB_PCACHE_InvalidateOnPFMProgramAll should be called prior to the
PFM write. This will invalidate and unlock every cache line during the write operation. The cache tags and masks are also
cleared for all lines.
If PLIB_PCACHE_InvalidateOnPFMProgramUnlocked is called before the PFM write, only lines that are not locked will be forced
invalid.
By default, only unlocked cache lines are invalidated during a PFM write.
5.6.15.4.3.2 Cache Line Operations
Performing a cache line operation is a two-step process. Before calling a Cache Line operation function, the cache line must be
selected and write-enabled. Once selected and write-enabled, any number of cache line operations may be performed on the
selected line until the line is cleared or a different line is selected and write-enabled.
Cache lines are selected and write-enabled using PLIB_PCACHE_CacheLineSelect. Cache lines are write-disabled using
PLIB_PCACHE_CacheLineDeselect.
The following example shows operations on two different cache lines. The code comments describe each operation.
Example: Cache Line Operations
uint32_t cacheLine[4] = {0x01234567, 0x12345678, 0x23456789, 0x34567890};
//Select Cache Line 4
PLIB_PCACHE_CacheLineSelect(4);
//Invalidate Cache Line 4
PLIB_PCACHE_CacheLineInvalid();
//Select Cache Line 6
PLIB_PCACHE_CacheLineSelect(6);
//Set Cache Line 6 to Data Type
PLIB_PCACHE_CacheLineData();
//Write Data to Cache Line 6
for (i=0; i).
Remarks
This function implements an operation of the CacheLineMask feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCacheLineMask in your application to
to automatically determine whether this feature is available.
Example
uint32_t mask;
mask = PLIB_PCACHE_CacheLineMaskGet(PCACHE_ID_0);
5.6.15.6.2.15 PLIB_PCACHE_CacheLineMaskSet Function
C
void PLIB_PCACHE_CacheLineMaskSet(
PCACHE_MODULE_ID index,
uint32_t mask
);
Description
This function sets the cache tag mask to force a match on set bits on the cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mask Address mask (bits set to '1' will force a match - valid bits: <15:5>)
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Returns
None.
Remarks
This function implements an operation of the CacheLineMask feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCacheLineMask in your application to
to automatically determine whether this feature is available.
Example
uint32_t mask = 0x0C0;
PLIB_PCACHE_CacheLineMaskSet(PCACHE_ID_0, mask);
5.6.15.6.2.16 PLIB_PCACHE_CacheLineSelect Function
C
void PLIB_PCACHE_CacheLineSelect(
PCACHE_MODULE_ID index,
uint32_t cache_line
);
Description
This function enables write access to the cache line specified by cache_line.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
cache_line Specifies the cache line to enable write access
Returns
None.
Remarks
At reset, all cache lines are read-only.
This function implements an operation of the CacheLineSelect feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCacheLineSelect in your application to
to automatically determine whether this feature is available.
Example
PLIB_PCACHE_CacheLineSelect(PCACHE_ID_0, 0);
5.6.15.6.2.17 PLIB_PCACHE_CacheLineUnlock Function
C
void PLIB_PCACHE_CacheLineUnlock(
PCACHE_MODULE_ID index
);
Description
This function unlocks the cache line previously write-enabled by PLIB_PCACHE_CacheLineSelect.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the CacheLineLock feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCacheLineLock in your application to to
automatically determine whether this feature is available.
Example
PLIB_PCACHE_CacheLineUnlock(PCACHE_ID_0);
5.6.15.6.2.18 PLIB_PCACHE_CacheLineValid Function
C
void PLIB_PCACHE_CacheLineValid(
PCACHE_MODULE_ID index
);
Description
This function validates the cache line previously write-enabled by PLIB_PCACHE_CacheLineSelect.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the CacheLineValid feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCacheLineValid in your application to to
automatically determine whether this feature is available.
Example
PLIB_PCACHE_CacheLineValid(PCACHE_ID_0);
5.6.15.6.2.19 PLIB_PCACHE_WordRead Function
C
uint32_t PLIB_PCACHE_WordRead(
PCACHE_MODULE_ID index,
uint32_t word
);
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Description
This function reads the word specified by word from the cache line previously write-enabled by PLIB_PCACHE_CacheLineSelect.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
word Location of the word in the data array to be read
Returns
32-bit unsigned word from cache data array.
Remarks
This function implements an operation of the Word feature. This feature may not be available on all devices. Please refer to the
specific device data sheet to determine availability or use PLIB_RTCC_ExistsWord in your application to to automatically
determine whether this feature is available.
Example
uint32_t word;
word = PLIB_PCACHE_WordRead(PCACHE_ID_0, 0);
5.6.15.6.2.20 PLIB_PCACHE_WordWrite Function
C
void PLIB_PCACHE_WordWrite(
PCACHE_MODULE_ID index,
uint32_t word,
uint32_t data
);
Description
This function writes the word (specified by word parameter) with data (specified by data parameter) to the cache line previously
write-enabled by PLIB_PCACHE_CacheLineSelect.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be written.
word Location of the word in the data array to be written
data 32-bit unsigned word to write to cache data array
Returns
None.
Remarks
This function implements an operation of the Word feature. This feature may not be available on all devices. Please refer to the
specific device data sheet to determine availability or use PLIB_RTCC_ExistsWord in your application to to automatically
determine whether this feature is available.
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Example
uint32_t word = 0;
uint32_t data = 0xDEADBEEF;
PLIB_PCACHE_WordWrite(PCACHE_ID_0, word, data);
5.6.15.6.3 Cache Status Functions
5.6.15.6.3.1 PLIB_PCACHE_CacheHitRead Function
C
uint32_t PLIB_PCACHE_CacheHitRead(
PCACHE_MODULE_ID index
);
Description
This function reads the number of cache hits.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
Number of cache hits.
Remarks
This function implements an operation of the CacheHit feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCacheHit in your application to to automatically
determine whether this feature is available.
Example
uint32_t cache_hits;
cache_hits = PLIB_PCACHE_CacheHitRead(PCACHE_ID_0);
5.6.15.6.3.2 PLIB_PCACHE_CacheHitWrite Function
C
void PLIB_PCACHE_CacheHitWrite(
PCACHE_MODULE_ID index,
uint32_t data
);
Description
This function sets the number of cache hits.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be written
data Number of cache hits to write
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Returns
None.
Remarks
This function implements an operation of the CacheHit feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCacheHit in your application to to automatically
determine whether this feature is available.
Example
PLIB_PCACHE_CacheHitWrite(PCACHE_ID_0, 0xF00);
5.6.15.6.3.3 PLIB_PCACHE_CacheMissRead Function
C
uint32_t PLIB_PCACHE_CacheMissRead(
PCACHE_MODULE_ID index
);
Description
This function reads the number of cache misses.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read.
Returns
Number of cache misses.
Remarks
This function implements an operation of the CacheMiss feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCacheMiss in your application to to
automatically determine whether this feature is available.
Example
uint32_t cache_misses;
cache_misses = PLIB_PCACHE_CacheMissRead(PCACHE_ID_0);
5.6.15.6.3.4 PLIB_PCACHE_CacheMissWrite Function
C
void PLIB_PCACHE_CacheMissWrite(
PCACHE_MODULE_ID index,
uint32_t data
);
Description
This function sets the number of cache misses.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be written
data Number of cache misses to write
Returns
None.
Remarks
This function implements an operation of the CacheMiss feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCacheMiss in your application to to
automatically determine whether this feature is available.
Example
PLIB_PCACHE_CacheMissWrite(PCACHE_ID_0, 0xF00);
5.6.15.6.3.5 PLIB_PCACHE_LeastRecentlyUsedStateRead Function
C
uint32_t PLIB_PCACHE_LeastRecentlyUsedStateRead(
PCACHE_MODULE_ID index
);
Description
This function reads the state of the cache least recently used encoding bits.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read.
Returns
State of Least Recently Used encoding bits represented as a 25-bit unsigned integer.
Remarks
This function implements an operation of the LeastRecentlyUsedState feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsLeastRecentlyUsedState in your
application to to automatically determine whether this feature is available.
Example
uint32_t lru_state;
lru_state = PLIB_PCACHE_LeastRecentlyUsedStateRead(PCACHE_ID_0);
5.6.15.6.4 Prefetch Control Functions
5.6.15.6.4.1 PLIB_PCACHE_PrefetchEnableGet Function
C
PLIB_PCACHE_PREFETCH_ENABLE PLIB_PCACHE_PrefetchEnableGet(
PCACHE_MODULE_ID index
);
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Description
This function gets the predictive prefetch state for the Prefetch Cache module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
PLIB_PCACHE_PREFETCH_ENABLE
Remarks
At reset, the Pretch Cache module is disabled and this function will return PLIB_PCACHE_DISABLE.
This function implements an operation of the PrefetchEnable feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsPrefetchEnable in your application to to
automatically determine whether this feature is available.
Example
PLIB_PCACHE_PREFETCH_ENABLE region;
region = PLIB_PCACHE_PrefetchEnableGet(PCACHE_ID_0);
5.6.15.6.4.2 PLIB_PCACHE_PrefetchEnableSet Function
C
void PLIB_PCACHE_PrefetchEnableSet(
PCACHE_MODULE_ID index,
PLIB_PCACHE_PREFETCH_ENABLE region
);
Description
This function sets the predictive prefetch state for the Prefetch Cache module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
region PLIB_PCACHE_PREFETCH_ENABLE
Returns
None.
Remarks
At reset, the Pretch Cache module is disabled.
This function implements an operation of the PrefetchEnable feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsPrefetchEnable in your application to to
automatically determine whether this feature is available.
Example
PLIB_PCACHE_PrefetchEnableSet(PCACHE_ID_0,
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PLIB_PCACHE_PREFETCH_ENABLE_ALL);
5.6.15.6.5 Prefetch Status Functions
5.6.15.6.5.1 PLIB_PCACHE_PrefetchAbortRead Function
C
uint32_t PLIB_PCACHE_PrefetchAbortRead(
PCACHE_MODULE_ID index
);
Description
This function reads the number of prefetch aborts.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
Number of prefetch aborts.
Remarks
This function implements an operation of the PrefetchAbort feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsPrefetchAbort in your application to to
automatically determine whether this feature is available.
Example
uint32_t pfabt;
pfabt = PLIB_PCACHE_PrefetchAbortRead(PCACHE_ID_0);
5.6.15.6.5.2 PLIB_PCACHE_PrefetchAbortWrite Function
C
void PLIB_PCACHE_PrefetchAbortWrite(
PCACHE_MODULE_ID index,
uint32_t data
);
Description
This function Sets the number of prefetch aborts.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be written
data Number of prefetch aborts
Returns
None.
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Remarks
This function implements an operation of the PrefetchAbort feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsPrefetchAbort in your application to to
automatically determine whether this feature is available.
Example
PLIB_PCACHE_PrefetchAbortWrite(PCACHE_ID_0, 0xF00);
5.6.15.6.6 Flash ECC Functions
5.6.15.6.6.1 PLIB_PCACHE_FlashDEDStatusClear Function
C
void PLIB_PCACHE_FlashDEDStatusClear(
PCACHE_MODULE_ID index
);
Description
This function clears a bus exception caused by a double-bit error.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be cleared
Returns
None
Remarks
The DED status is set by hardware.
This function implements an operation of the FlashDEDStatus feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsFlashDEDStatus in your application to
to automatically determine whether this feature is available.
Example
PLIB_PCACHE_FlashDEDStatusClear(PCACHE_ID_0);
5.6.15.6.6.2 PLIB_PCACHE_FlashDEDStatusGet Function
C
bool PLIB_PCACHE_FlashDEDStatusGet(
PCACHE_MODULE_ID index
);
Description
This function determines if a bus exception was caused by a double-bit error.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
• true - A double-bit error was detected
• false - A double-bit error was not detected
Remarks
The Double-bit Error Detected (DED) status is set by hardware.
This function implements an operation of the FlashDEDStatus feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsFlashDEDStatus in your application to
to automatically determine whether this feature is available.
Example
bool dedStatus;
dedStatus = PLIB_PCACHE_FlashDEDStatusGet(PCACHE_ID_0);
5.6.15.6.6.3 PLIB_PCACHE_FlashSECCountGet Function
C
uint8_t PLIB_PCACHE_FlashSECCountGet(
PCACHE_MODULE_ID index
);
Description
This function returns the current value of the Flash SEC counter.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
count - Number of SEC events to occur before the SEC status is set to true
Remarks
This function implements an operation of the FlashSECCount feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsFlashSECCount in your application to
to automatically determine whether this feature is available.
Example
uint8_t count;
count = PLIB_PCACHE_FlashSECCountGet(PCACHE_ID_0);
5.6.15.6.6.4 PLIB_PCACHE_FlashSECCountSet Function
C
void PLIB_PCACHE_FlashSECCountSet(
PCACHE_MODULE_ID index,
uint8_t count
);
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Description
This function sets the number of single-bit error corrections that must occur before the SEC status is set to true.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
count Number of SEC events to occur before SEC status is set to true
Returns
None
Remarks
This function implements an operation of the FlashSECCount feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsFlashSECCount in your application to
to automatically determine whether this feature is available.
Example
PLIB_PCACHE_FlashSECCountSet(PCACHE_ID_0, 255);
5.6.15.6.6.5 PLIB_PCACHE_FlashSECIntDisable Function
C
void PLIB_PCACHE_FlashSECIntDisable(
PCACHE_MODULE_ID index
);
Description
This function disables an interrupt on SEC.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be disabled
Returns
None
Remarks
At reset the SEC interrupt is disabled.
This function implements an operation of the FlashSECInt feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsFlashSECInt in your application to to
automatically determine whether this feature is available.
Example
PLIB_PCACHE_FlashSECIntDisable(PCACHE_ID_0);
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5.6.15.6.6.6 PLIB_PCACHE_FlashSECIntEnable Function
C
void PLIB_PCACHE_FlashSECIntEnable(
PCACHE_MODULE_ID index
);
Description
This function enables an interrupt on SEC.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be enabled
Returns
None
Remarks
At reset the SEC interrupt is disabled.
This function implements an operation of the FlashSECInt feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsFlashSECInt in your application to to
automatically determine whether this feature is available.
Example
PLIB_PCACHE_FlashSECIntEnable(PCACHE_ID_0);
5.6.15.6.6.7 PLIB_PCACHE_FlashSECStatusClear Function
C
void PLIB_PCACHE_FlashSECStatusClear(
PCACHE_MODULE_ID index
);
Description
This function sets the single-bit error corrected status to false.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be cleared
Returns
None
Remarks
The SEC status must be cleared in response to a Prefetch Cache SEC interrupt.
This function implements an operation of the FlashSECStatus feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsFlashSECStatus in your application to
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to automatically determine whether this feature is available.
Example
PLIB_PCACHE_FlashSECStatusClear(PCACHE_ID_0);
5.6.15.6.6.8 PLIB_PCACHE_FlashSECStatusGet Function
C
bool PLIB_PCACHE_FlashSECStatusGet(
PCACHE_MODULE_ID index
);
Description
This function determines if a SEC event triggered a Prefetch Cache interrupt.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be read
Returns
• true - A single-bit error was corrected
• false - A double-bit error was not corrected
Remarks
The SEC bit is set when a single-bit error is corrected and the SEC counter is zero. If the Flash SEC interrupt is enabled, an
error event is reported to the CPU by a Prefetch Cache interrupt event.
This function implements an operation of the FlashSECStatus feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsFlashSECStatus in your application to
to automatically determine whether this feature is available.
Example
bool secStatus;
secStatus = PLIB_PCACHE_FlashSECStatusGet(PCACHE_ID_0);
5.6.15.6.6.9 PLIB_PCACHE_FlashSECStatusSet Function
C
void PLIB_PCACHE_FlashSECStatusSet(
PCACHE_MODULE_ID index
);
Description
This function sets the single-bit error corrected status to true.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
None
Remarks
This function is provided for code testing and debug purposes. Setting the SEC status while the SEC count is zero and the SEC
interrupt is enabled will trigger a Prefetch Cache interrupt to the CPU.
This function implements an operation of the FlashSECStatus feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsFlashSECStatus in your application to
to automatically determine whether this feature is available.
Example
PLIB_PCACHE_FlashSECStatusSet(PCACHE_ID_0);
5.6.15.6.7 Data Types and Constants
5.6.15.6.7.1 PLIB_PCACHE_MAX_SEC_COUNT Macro
C
#define PLIB_PCACHE_MAX_SEC_COUNT 255
Description
Maximum Value for Single Bit Error Counter
This definition specifies the maximum value for single bit error counter.
Remarks
The actual maximum value of the SEC counter is processor specific and is defined in the processor-specific header files (see
processor.h).
5.6.15.6.7.2 PLIB_PCACHE_NUM_LINES Macro
C
#define PLIB_PCACHE_NUM_LINES
Description
Number of Cache Lines
This definition specifies the number of Prefetch Cache Lines available.
Remarks
The actual number of cache lines is processor specific and is defined in the processor-specific header files (see processor.h).
5.6.15.6.7.3 PLIB_PCACHE_NUM_WORDS_PER_LINE Macro
C
#define PLIB_PCACHE_NUM_WORDS_PER_LINE
Description
Number of Words per Cache Line
This definition specifies the number of Words per Prefetch Cache Line.
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Remarks
The actual number of words per cache line is processor specific and is defined in the processor-specific header files (see
processor.h).
5.6.15.6.7.4 PCACHE_MODULE_ID Enumeration
C
typedef enum {
PCACHE_ID_1,
PCACHE_NUMBER_OF_MODULES
} PCACHE_MODULE_ID;
Description
Module ID
This enumeration lists the possible Module IDs for the pcache.
Remarks
Refer to the data sheet to get the correct number of modules defined for the desired device.
5.6.15.6.7.5 PLIB_PCACHE_DATA_ENABLE Enumeration
C
typedef enum {
PLIB_PCACHE_DATA_DISABLE,
PLIB_PCACHE_DATA_1LINE,
PLIB_PCACHE_DATA_2LINE,
PLIB_PCACHE_DATA_4LINE
} PLIB_PCACHE_DATA_ENABLE;
Description
Data Cache Enable
This enumeration lists the possible predictive prefetch states for the Prefetch Cache.
Members
Members Description
PLIB_PCACHE_DATA_DISABLE Disable data caching
PLIB_PCACHE_DATA_1LINE Enable data caching with a size of 1 Line
PLIB_PCACHE_DATA_2LINE Enable data caching with a size of 2 Lines
PLIB_PCACHE_DATA_4LINE Enable data caching with a size of 4 Lines
Remarks
Not all settings are available for all devices. See the device-specific data sheet for details. This enumeration is processor specific
and is defined in the processor-specific header files (see processor.h).
5.6.15.6.7.6 PLIB_PCACHE_PREFETCH_ENABLE Enumeration
C
typedef enum {
PLIB_PCACHE_PREFETCH_DISABLE,
PLIB_PCACHE_PREFETCH_ENABLE_CACHED_REGIONS,
PLIB_PCACHE_PREFETCH_ENABLE_CPU_INST,
PLIB_PCACHE_PREFETCH_ENABLE_NONCACHED_REGIONS,
PLIB_PCACHE_PREFETCH_ENABLE_CPU_INST_DATA,
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PLIB_PCACHE_PREFETCH_ENABLE_ALL
} PLIB_PCACHE_PREFETCH_ENABLE;
Description
Predictive Prefetch Cache Enable Bits
This enumeration lists the possible predictive prefetch states for the Prefetch Cache.
Members
Members Description
PLIB_PCACHE_PREFETCH_DISABLE Disable predictive prefetch enable
PLIB_PCACHE_PREFETCH_ENABLE_CACHED_REGIONS Enable predictive prefetch cache for cacheable regions only
PLIB_PCACHE_PREFETCH_ENABLE_CPU_INST Enable predictive prefetch cache for cacheable regions only
PLIB_PCACHE_PREFETCH_ENABLE_NONCACHED_REGIONS Enable predictive prefetch cache for non-cacheable regions
only
PLIB_PCACHE_PREFETCH_ENABLE_CPU_INST_DATA Enable predictive prefetch cache for non-cacheable regions
only
PLIB_PCACHE_PREFETCH_ENABLE_ALL Enable predictive prefetch cache for cacheable and
non-cacheable regions
Remarks
Not all settings are available for all devices. See the device-specific data sheet for details. This enumeration is processor specific
and is defined in the processor-specific header files (see processor.h).
5.6.15.6.8 Feature Existence Functions
5.6.15.6.8.1 PLIB_PCACHE_ExistsCacheHit Function
C
bool PLIB_PCACHE_ExistsCacheHit(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the CacheHit feature is available on the Prefetch Cache module. When this interface returns true,
these functions are supported on the device:
• PLIB_PCACHE_CacheHitRead
• PLIB_PCACHE_CacheHitWrite
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CacheHit feature is supported on the device
• false - The CacheHit feature is not supported on the device
Remarks
None.
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5.6.15.6.8.2 PLIB_PCACHE_ExistsCacheLine Function
C
bool PLIB_PCACHE_ExistsCacheLine(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the CacheLineSelect feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_CacheLineSelect
• PLIB_PCACHE_CacheLineDeselect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CacheLineSelect feature is supported on the device
• false - The CacheLineSelect feature is not supported on the device
Remarks
None.
5.6.15.6.8.3 PLIB_PCACHE_ExistsCacheLineAddr Function
C
bool PLIB_PCACHE_ExistsCacheLineAddr(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the CacheLineAddr feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_CacheLineAddrSet
• PLIB_PCACHE_CacheLineAddrGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CacheLineAddr feature is supported on the device
• false - The CacheLineAddr feature is not supported on the device
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Remarks
None.
5.6.15.6.8.4 PLIB_PCACHE_ExistsCacheLineFlashType Function
C
bool PLIB_PCACHE_ExistsCacheLineFlashType(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the CacheLineFlashType feature is available on the Prefetch Cache module. When this interface
returns true, these functions are supported on the device:
• PLIB_PCACHE_CacheLineFlashTypeBoot
• PLIB_PCACHE_CacheLineFlashTypeInst
• PLIB_PCACHE_CacheLineFlashTypeIsInst
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CacheLineFlashType feature is supported on the device
• false - The CacheLineFlashType feature is not supported on the device
Remarks
None.
5.6.15.6.8.5 PLIB_PCACHE_ExistsCacheLineLock Function
C
bool PLIB_PCACHE_ExistsCacheLineLock(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the CacheLineLock feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_CacheLineLock
• PLIB_PCACHE_CacheLineUnlock
• PLIB_PCACHE_CacheLineIsLocked
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CacheLineLock feature is supported on the device
• false - The CacheLineLock feature is not supported on the device
Remarks
None.
5.6.15.6.8.6 PLIB_PCACHE_ExistsCacheLineMask Function
C
bool PLIB_PCACHE_ExistsCacheLineMask(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the CacheLineMask feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_CacheLineMaskSet
• PLIB_PCACHE_CacheLineMaskGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CacheLineMask feature is supported on the device
• false - The CacheLineMask feature is not supported on the device
Remarks
None.
5.6.15.6.8.7 PLIB_PCACHE_ExistsCacheLineType Function
C
bool PLIB_PCACHE_ExistsCacheLineType(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the CacheLineType feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_CacheLineData
• PLIB_PCACHE_CacheLineInst
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• PLIB_PCACHE_CacheLineIsInst
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CacheLineType feature is supported on the device
• false - The CacheLineType feature is not supported on the device
Remarks
None.
5.6.15.6.8.8 PLIB_PCACHE_ExistsCacheLineValid Function
C
bool PLIB_PCACHE_ExistsCacheLineValid(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the CacheLineValid feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_CacheLineValid
• PLIB_PCACHE_CacheLineInvalid
• PLIB_PCACHE_CacheLineIsValid
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CacheLineValid feature is supported on the device
• false - The CacheLineValid feature is not supported on the device
Remarks
None.
5.6.15.6.8.9 PLIB_PCACHE_ExistsCacheMiss Function
C
bool PLIB_PCACHE_ExistsCacheMiss(
PCACHE_MODULE_ID index
);
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Description
This interface identifies that the CacheMiss feature is available on the Prefetch Cache module. When this interface returns true,
these functions are supported on the device:
• PLIB_PCACHE_CacheMissRead
• PLIB_PCACHE_CacheMissWrite
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CacheMiss feature is supported on the device
• false - The CacheMiss feature is not supported on the device
Remarks
None.
5.6.15.6.8.10 PLIB_PCACHE_ExistsDataCacheEnable Function
C
bool PLIB_PCACHE_ExistsDataCacheEnable(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the DataCacheEnable feature is available on the Prefetch Cache module. When this interface
returns true, these functions are supported on the device:
• PLIB_PCACHE_DataCacheEnableSet
• PLIB_PCACHE_DataCacheEnableGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataCacheEnable feature is supported on the device
• false - The DataCacheEnable feature is not supported on the device
Remarks
None.
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5.6.15.6.8.11 PLIB_PCACHE_ExistsFlashDEDStatus Function
C
bool PLIB_PCACHE_ExistsFlashDEDStatus(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the FlashDEDStatus feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_FlashDEDStatusGet
• PLIB_PCACHE_FlashDEDStatusClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FlashDEDStatus feature is supported on the device
• false - The FlashDEDStatus feature is not supported on the device
Remarks
None.
5.6.15.6.8.12 PLIB_PCACHE_ExistsFlashSECCount Function
C
bool PLIB_PCACHE_ExistsFlashSECCount(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the FlashSECCount feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_FlashSECCountSet
• PLIB_PCACHE_FlashSECCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FlashSECCount feature is supported on the device
• false - The FlashSECCount feature is not supported on the device
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Remarks
None.
5.6.15.6.8.13 PLIB_PCACHE_ExistsFlashSECInt Function
C
bool PLIB_PCACHE_ExistsFlashSECInt(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the FlashSECInt feature is available on the Prefetch Cache module. When this interface returns true,
these functions are supported on the device:
• PLIB_PCACHE_FlashSECIntEnable
• PLIB_PCACHE_FlashSECIntDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FlashSECInt feature is supported on the device
• false - The FlashSECInt feature is not supported on the device
Remarks
None.
5.6.15.6.8.14 PLIB_PCACHE_ExistsFlashSECStatus Function
C
bool PLIB_PCACHE_ExistsFlashSECStatus(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the FlashSECStatus feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_FlashSECStatusGet
• PLIB_PCACHE_FlashSECStatusSet
• PLIB_PCACHE_FlashSECStatusClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The FlashSECStatus feature is supported on the device
• false - The FlashSECStatus feature is not supported on the device
Remarks
None.
5.6.15.6.8.15 PLIB_PCACHE_ExistsInvalidateOnPFMProgram Function
C
bool PLIB_PCACHE_ExistsInvalidateOnPFMProgram(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the InvalidateOnPFMProgram feature is available on the Prefetch Cache module. When this
interface returns true, these functions are supported on the device:
• PLIB_PCACHE_InvalidateOnPFMProgramAll
• PLIB_PCACHE_InvalidateOnPFMProgramUnlocked
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The InvalidateOnPFMProgram feature is supported on the device
• false - The InvalidateOnPFMProgram feature is not supported on the device
Remarks
None.
5.6.15.6.8.16 PLIB_PCACHE_ExistsLeastRecentlyUsedState Function
C
bool PLIB_PCACHE_ExistsLeastRecentlyUsedState(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the LeastRecentlyUsedState feature is available on the Prefetch Cache module. When this interface
returns true, this function is supported on the device:
• PLIB_PCACHE_LeastRecentlyUsedStateRead
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LeastRecentlyUsedState feature is supported on the device
• false - The LeastRecentlyUsedState feature is not supported on the device
Remarks
None.
5.6.15.6.8.17 PLIB_PCACHE_ExistsPrefetchAbort Function
C
bool PLIB_PCACHE_ExistsPrefetchAbort(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the PrefetchAbort feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_PrefetchAbortRead
• PLIB_PCACHE_PrefetchAbortWrite
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PrefetchAbort feature is supported on the device
• false - The PrefetchAbort feature is not supported on the device
Remarks
None.
5.6.15.6.8.18 PLIB_PCACHE_ExistsPrefetchEnable Function
C
bool PLIB_PCACHE_ExistsPrefetchEnable(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the PrefetchEnable feature is available on the Prefetch Cache module. When this interface returns
true, these functions are supported on the device:
• PLIB_PCACHE_PrefetchEnableSet
• PLIB_PCACHE_PrefetchEnableGet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PrefetchEnable feature is supported on the device
• false - The PrefetchEnable feature is not supported on the device
Remarks
None.
5.6.15.6.8.19 PLIB_PCACHE_ExistsWaitState Function
C
bool PLIB_PCACHE_ExistsWaitState(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the WaitState feature is available on the Prefetch Cache module. When this interface returns true,
these functions are supported on the device:
• PLIB_PCACHE_WaitStateSet
• PLIB_PCACHE_WaitStateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WaitState feature is supported on the device
• false - The WaitState feature is not supported on the device
Remarks
None.
5.6.15.6.8.20 PLIB_PCACHE_ExistsWord Function
C
bool PLIB_PCACHE_ExistsWord(
PCACHE_MODULE_ID index
);
Description
This interface identifies that the Word feature is available on the Prefetch Cache module. When this interface returns true, these
functions are supported on the device:
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• PLIB_PCACHE_WordRead
• PLIB_PCACHE_WordWrite
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Word feature is supported on the device
• false - The Word feature is not supported on the device
Remarks
None.
5.6.15.7 Files
Files
Name Description
plib_pcache.h Defines the Prefetch Cache (PCACHE) Peripheral Library Interface
Description
5.6.15.7.1 plib_pcache.h
Prefetch Cache Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Prefetch Cache (PCACHE) Periheral Library for Microchip microcontrollers. The definitions in this file are for the Prefetch Cache
module.
Functions
Name Description
PLIB_PCACHE_CacheHitRead Reads the number of cache hits.
PLIB_PCACHE_CacheHitWrite Sets the number of cache hits.
PLIB_PCACHE_CacheLineAddrGet Gets the TAG address in the cache line previously
write-enabled by PLIB_PCACHE_CacheLineSelect.
PLIB_PCACHE_CacheLineAddrSet Sets the TAG address in the cache line previously
write-enabled by PLIB_PCACHE_CacheLineSelect.
PLIB_PCACHE_CacheLineData Sets cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect to data type.
PLIB_PCACHE_CacheLineDeselect Disables write access to the cache line specified by
cache_line.
PLIB_PCACHE_CacheLineFlashTypeBoot Set the cache line tag for the line previously write-enabled by
PLIB_PCACHE_CacheLineSelect as residing in boot Flash.
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PLIB_PCACHE_CacheLineFlashTypeInst Set the cache line tag for the line previously write-enabled by
PLIB_PCACHE_CacheLineSelect as residing in instruction
Flash.
PLIB_PCACHE_CacheLineFlashTypeIsInst Returns true if the cache line tag for the line previously
write-enabled by PLIB_PCACHE_CacheLineSelect shows
the line is residing in instruction Flash.
PLIB_PCACHE_CacheLineInst Sets cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect to instruction type.
PLIB_PCACHE_CacheLineInvalid Invalidates cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect.
PLIB_PCACHE_CacheLineIsInst Returns true if cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect is set to instruction type.
PLIB_PCACHE_CacheLineIsLocked Returns true if cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect is locked.
PLIB_PCACHE_CacheLineIsValid Returnes true if cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect is valid.
PLIB_PCACHE_CacheLineLock Locks cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect.
PLIB_PCACHE_CacheLineMaskGet Returns the current state of the cache tag mask for the cache
line previously write-enabled by
PLIB_PCACHE_CacheLineSelect.
PLIB_PCACHE_CacheLineMaskSet Sets the cache tag mask to force a match on set bits on the
cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect.
PLIB_PCACHE_CacheLineSelect Enables write access to the cache line specified by
cache_line.
PLIB_PCACHE_CacheLineUnlock Unlocks cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect.
PLIB_PCACHE_CacheLineValid Validates cache line previously write-enabled by
PLIB_PCACHE_CacheLineSelect.
PLIB_PCACHE_CacheMissRead Reads the number of cache misses.
PLIB_PCACHE_CacheMissWrite Sets the number of cache misses.
PLIB_PCACHE_DataCacheEnableGet Gets the data cache enable bits.
PLIB_PCACHE_DataCacheEnableSet Sets the data cache enable bits.
PLIB_PCACHE_ExistsCacheHit Identifies that the CacheHit feature exists on the Prefetch
Cache module.
PLIB_PCACHE_ExistsCacheLine Identifies that the CacheLineSelect feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsCacheLineAddr Identifies that the CacheLineAddr feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsCacheLineFlashType Identifies that the CacheLineFlashType feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsCacheLineLock Identifies that the CacheLineLock feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsCacheLineMask Identifies that the CacheLineMask feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsCacheLineType Identifies that the CacheLineType feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsCacheLineValid Identifies that the CacheLineValid feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsCacheMiss Identifies that the CacheMiss feature exists on the Prefetch
Cache module.
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PLIB_PCACHE_ExistsDataCacheEnable Identifies that the DataCacheEnable feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsFlashDEDStatus Identifies that the FlashDEDStatus feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsFlashSECCount Identifies that the FlashSECCount feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsFlashSECInt Identifies that the FlashSECInt feature exists on the Prefetch
Cache module.
PLIB_PCACHE_ExistsFlashSECStatus Identifies that the FlashSECStatus feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsInvalidateOnPFMProgram Identifies that the InvalidateOnPFMProgram feature exists on
the Prefetch Cache module.
PLIB_PCACHE_ExistsLeastRecentlyUsedState Identifies that the LeastRecentlyUsedState feature exists on
the Prefetch Cache module.
PLIB_PCACHE_ExistsPrefetchAbort Identifies that the PrefetchAbort feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsPrefetchEnable Identifies that the PrefetchEnable feature exists on the
Prefetch Cache module.
PLIB_PCACHE_ExistsWaitState Identifies that the WaitState feature exists on the Prefetch
Cache module.
PLIB_PCACHE_ExistsWord Identifies that the Word feature exists on the Prefetch Cache
module.
PLIB_PCACHE_FlashDEDStatusClear Clears a bus exception caused by a double-bit error.
PLIB_PCACHE_FlashDEDStatusGet Determines if a bus exception was caused by a double-bit
error.
PLIB_PCACHE_FlashSECCountGet Returns the current value of the Flash SEC counter.
PLIB_PCACHE_FlashSECCountSet Sets the number of single-bit error corrections that must
occur before the SEC status is set to true.
PLIB_PCACHE_FlashSECIntDisable Disables an interrupt on SEC.
PLIB_PCACHE_FlashSECIntEnable Enables an interrupt on SEC.
PLIB_PCACHE_FlashSECStatusClear Sets the single-bit error corrected status to false.
PLIB_PCACHE_FlashSECStatusGet Determines if a SEC event triggered a Prefetch Cache
interrupt.
PLIB_PCACHE_FlashSECStatusSet Sets the single-bit error corrected status to true.
PLIB_PCACHE_InvalidateOnPFMProgramAll Sets prefetch cache to invalidate all data and instruction lines
on a PFM program cycle.
PLIB_PCACHE_InvalidateOnPFMProgramUnlocked Sets prefetch cache to invalidate all unlocked data and
instruction lines on a PFM program cycle.
PLIB_PCACHE_LeastRecentlyUsedStateRead Reads the state of the cache least recently used encoding
bits.
PLIB_PCACHE_PrefetchAbortRead Reads the number of prefetch aborts.
PLIB_PCACHE_PrefetchAbortWrite Sets the number of prefetch aborts.
PLIB_PCACHE_PrefetchEnableGet Gets the predictive prefetch state for the Prefetch Cache
module.
PLIB_PCACHE_PrefetchEnableSet Sets the predictive prefetch state for the Prefetch Cache
module.
PLIB_PCACHE_WaitStateGet Gets the prefetch cache access time.
PLIB_PCACHE_WaitStateSet Sets the prefetch cache access time.
PLIB_PCACHE_WordRead Reads the word specified by word from cache line previously
write-enabled by PLIB_PCACHE_CacheLineSelect.
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PLIB_PCACHE_WordWrite Writes the word (specified by word parameter) with data
(specified by data parameter) to cache line previously
write-enabled by PLIB_PCACHE_CacheLineSelect.
File Name
plib_pcache.h
Company
Microchip Technology Inc.
5.6.16 PMP Peripheral Library
5.6.16.1 Introduction
Parallel Master Port (PMP) Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Parallel Master Port (PMP) module on Microchip microcontrollers with a
convenient C language interface. It can be used to simplify low-level access to the module without the necessity of interacting
directly with the module's registers, thereby hiding differences from one microcontroller variant to another.
Description
The following diagram shows a block diagram of the PMP module and how it interacts with other peripherals.
PMP Overview
5.6.16.2 Release Notes
MPLAB Harmony Version: v0.70b PMP Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
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Known Issues:
Nothing to report in this release.
5.6.16.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.16.4 Using the Library
Using the Library
This topic describes the basic architecture of the PMP Peripheral Library and provides information and examples on its use.
Interface Header File: plib_pmp.h
The interface to the PMP Peripheral library is defined in the "plib_pmp.h" header file, which is included by the "peripheral.h"
peripheral library header file. Any C language source (.c) file that uses the PMP Peripheral Library must include "peripheral.h".
5.6.16.4.1 Hardware Abstraction Model
This library provides a low-level abstraction of the Parallel Master Port (PMP) module on Microchip's microcontrollers with a
convenient C language interface. This topic describes how that abstraction is modeled in software and introduces the library's
interface.
Description
Hardware Abstraction Model Description
The PMP module provides interface routines to interact with external peripherals such as LCD, EEPROM, Flash memory, etc.,
as shown in the following diagram. The diagram shows the PMP module acting as a master. The PMP module can be easily
configured to act as a slave. The address and data lines can be multiplexed to suit the application. The address and data buffers
are up to 2-byte (16-bit) buffers for data transmitted or received by the parallel interface to the PMP bus over the data and
address lines synchronized with control logic including the read and write strobe.
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PMP Hardware Abstraction Model Diagram
The desired timing wait states to suit different peripheral timings can also be programmed using the PMP module.
5.6.16.4.2 Library Usage Model
This section describes the library usage model for the PMP Peripheral Library.
Description
The following diagram shows the high level organization of the PMP PLIB usage model. The items in the diagram correspond to
the groupings in the Library Interface section.
PMP Library Usage Model
Library Interface Section Description
5.6.16.4.3 How the Library Works
How the Library Works
Before enabling the PMP module, the caller must initialize basic parameters such as wait states timings, and interrupt mode
features (see the Initialization section).
After the module has been enabled, it can begin monitoring the bus as a slave device waiting to be addressed by an external
master (see the Operating as a Slave section). A slave device only transfers data on the bus when it has been addressed by a
master. If the module is used to start a transfer, it is operating as a master. A master addresses a slave and controls the transfer
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of data by providing the clock (see the Operating as a Master section).
Some operations in the PMP peripheral library initiate actions on the PMP bus that require time to complete. Also, some events
occur asynchronously on the bus. In each of these cases, the module causes either a "master", "slave", or "error" interrupt. The
State Machine section describes the different states that can cause an interrupt and show what causes the transition from one
state to another. The Handling Errors section describes the various errors that can occur and how to deal with them.
5.6.16.4.3.1 Initialization
This section describes the general initialization of the PMP module.
Description
The important configurations to look for are as follows.
Operating Mode
Depending on the device, the PMP module can function in Master modes 1 or 2, buffered/enhanced slave mode or the legacy
slave mode. To set the PMP module in the appropriate mode, use PLIB_PMP_OperationModeSelect.
Multiplexing Mode
Depending on the application requirement or hardware arrangement, the data lines can be used to multiplex the addressing
information. Various multiplexing modes supported are listed by PMP_MUX_MODE. Use PLIB_PMP_MultiplexModeSelect to
select the appropriate multiplexing mode.
Chip Select Mode
As needed, the Chip Select lines can be made to function as Chip Select or as address lines. Use
PLIB_PMP_ChipSelectFunctionSelect to select the required functionality of Chip Select lines.
Interrupt Mode
PMP generates interrupts based on the option selected for the interrupt mode. Interrupts can be enabled, disabled, generated at
the end of a read or write cycle, or when other events occur. Use the PLIB_PMP_InterruptModeSelect to select these options.
Address Increment Mode
After every read/write cycle, the PMP module can be configured to automatically increment or decrement the address it is
accessing. Use PLIB_PMP_AddressIncrementModeSelect to select this option.
To initialize the PMP module, perform the following sequence:
1. Select the desired initialization options using the General Initialization Functions to select the desired operation of the
following features:
• Operating mode
• Multiplexing mode
• Chip Select mode
• Interrupt mode
• Address Incrementing mode
• Stop-in-Idle operation
2. Program the wait states of the PMP module. Refer to Wait States Initialization Functions for an example.
3. If operating in Master mode, set the desired address (8-bit in this case, the size may vary depending on the application) using
PLIB_PMP_AddressSet.
4. If running in an interrupt-driven environment, clear any pending interrupts and enable the appropriate (master, slave, and
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error) PMP interrupts. (Note: Refer to the "Interrupt Controller" chapter in the specific device data sheet for details).
5. Enable the module for operation using PLIB_PMP_Enable.
Example
// Configure General PMP Options
// Select the PMP operation mode
PLIB_PMP_OperationModeSelect( PMP_ID_0, PMP_MASTER_READ_WRITE_STROBES_INDEPENDENT );
// Set the multiplexing to none. Address and data lines are not multiplexed.
PLIB_PMP_MultiplexModeSelect( PMP_ID_0, PMP_MUX_NONE );
// Select the function of chip-select lines
PLIB_PMP_ChipSelectFunctionSelect( PMP_ID_0, PMCS1_PMCS2_AS_ADDRESS_LINES );
// Select the interrupt mode
PLIB_PMP_InterruptModeSelect( PMP_ID_0, PMP_INTERRUPT_NONE );
// disable the auto increment/decrement of address after each read/write
PLIB_PMP_AddressIncrementModeSelect( PMP_ID_0, PMP_ADDRESS_INCREMENT_DECREMENT_DISABLE );
// Enable stop in Idle mode.
PLIB_PMP_StopInIdleEnable( PMP_ID_0 );
// Set Desired Wait State Values
// Set the data wait states
PLIB_PMP_WaitStatesDataSetUpSelect( PMP_ID_0, PMP_DATA_WAIT_FOUR );
// Set the strobe wait states
PLIB_PMP_WaitStatesStrobeSelect( PMP_ID_0, PMP_STROBE_WAIT_1 );
// Set the data hold wait states.
PLIB_PMP_WaitStatesDataHoldSelect( PMP_ID_0, PMP_DATA_HOLD_1 );
// Set the appropriate address (MASTER only)
PLIB_PMP_AddressSet ( PMP_ID_0, 0x12 );
// Optional: Clear and enable interrupts before enabling the PMP module.
// Enable the module
PLIB_PMP_Enable( PMP_ID_0 );
Note: Refer to the "Interrupt Controller" chapter in the specific device data sheet for details on how to clear and enable the
PMP module interrupts.
5.6.16.4.3.2 Wait States Initialization
This section describes set up and initialization of the wait states for the PMP module.
Description
In Master mode, the user can control the duration of the read, write and address cycles by configuring the module Wait states.
One Wait state period is equivalent to one peripheral bus clock cycles. The following figure shows an example of a Master Read
operation using Wait states.
Wait States
Wait states can be added to the beginning, middle and end of any read or write cycle using the corresponding bits in the PMP
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Configuration. The wait states differ depending on which PMP mode you are in, but setting the wait states is the same per mode
and device, as shown in the following example.
Initializing Wait States
The following sequence can be used to set up the wait states for the PMP Master mode.
Preconditions:
None.
Process:
1. Set the data hold time using PLIB_PMP_WaitStatesDataHoldSelect.
2. Set the strobe wait time using PLIB_PMP_WaitStatesStrobeSelect.
3. Set the data wait time using PLIB_PMP_WaitStatesDataSetUpSelect.
Example
// Set the data wait states
PLIB_PMP_WaitStatesDataSetUpSelect( PMP_ID_0, PMP_DATA_WAIT_ONE );
// Set the strobe wait states
PLIB_PMP_WaitStatesStrobeSelect( PMP_ID_0, PMP_STROBE_WAIT_1 );
// Set the data hold wait states.
PLIB_PMP_WaitStatesDataHoldSelect( PMP_ID_0, PMP_DATA_HOLD_1 );
5.6.16.4.3.3 Operating as a Master
This section describes how to set up the PMP module to operate as a master.
Description
The PMP module, while acting as a master, waits for its input or output buffers to be read or written. Once the buffers have been
manipulated, the appropriate action takes place.
A PMP bus transfer always begins with reading or writing to the appropriate PMP input/output buffers. A read from a PMP input
buffer performs a PMP read. A write to a PMP output buffer performs a PMP write. The address pins associated with the transfer
will have the value that is inside the address register of the PMP module. These steps are summarized as follows.
Summary of Steps
• Set up the proper PMP address
• Send or read data bytes
Each of these steps making up a transfer will take some time to complete. By monitoring the busy bit of the PMP module, the
user application can determine whether the transfer is complete. The completion of each step can cause a PMP interrupt.
Sending a Data Byte
The following sequence can be used to send a data byte and repeated to send an arbitrary number of data bytes.
Preconditions:
• The address of the destination must be configured in the PMP module
• The proper control signals are configured for PMP operation
• The PMP module is configured for the desired Master mode
• The PMP module is enabled
Process:
1. Ensure that the PMP module is not busy by using PLIB_PMP_PortIsBusy.
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2. Write the output data buffer using PLIB_PMP_MasterSend.
Example:
uint8_t data = 'a';
// Set the destination address to be written
PLIB_PMP_AddressSet(PMP_ID_0, 0x1234 );
// Check to see if the PMP is busy, then send the byte
if(!PLIB_PMP_PortIsBusy( PMP_ID_0 ))
{
// Send the data
PLIB_PMP_MasterSend( PMP_ID_0, data );
}
Receiving a Data byte
The following sequence can be used to send a data byte and repeated to send an arbitrary number of data bytes.
Preconditions:
• The address of the destination must be configured in the PMP module.
• The proper control signal are configured for PMP operation.
Process:
1. Ensure that the PMP module is not busy by using PLIB_PMP_PortIsBusy.
2. Write the output data buffer using PLIB_PMP_MasterReceive.
Example:
uint8_t data;
// Set the source address
PLIB_PMP_AddressSet(PMP_ID_0, 0x1234 );
// Check to see the PMP is not busy, then read the data
if(!PLIB_PMP_PortIsBusy( PMP_ID_0 ))
{
// receive the data
data = PLIB_PMP_MasterReceive( PMP_ID_0 );
}
5.6.16.4.3.4 Operating as a Slave
This section describes how to set up the PMP module to operate as a slave.
Description
The PMP module while acting as a slave, waits for read or write strobes to occur. Once the buffers have been manipulated, the
appropriate action takes place.
Summary of Steps
• Check to see if data is available to be read
• Prepare output buffer for slave read
Each of these steps making up a transfer will take some time to complete. By monitoring the busy bit of the PMP module, the
user application can determine whether the transfer is complete. The completion of each step can cause a PMP interrupt.
Reading Available Data
The following sequence can be used to receive a data byte and repeated to receive an arbitrary number of data bytes.
Preconditions:
• The address of the destination must be set in the PMP module
• The proper control signals are initialized for PMP operation
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Process:
1. Check to see if data is available using PLIB_PMP_InputBufferXIsFull.
2. Read the available data using PLIB_PMP_InputBufferXByteReceive.
Example:
uint8_t data;
// Check to see if data is available, then receive the byte
if(PLIB_PMP_InputBufferXIsFull( PMP_ID_0, 1))
{
// Receive the data from buffer one.
data = PLIB_PMP_InputBufferXByteReceive( PMP_ID_0, 1 );
}
Preparing Output Buffer for Slave Write
The following sequence can be used to send a data byte and repeated to send an arbitrary number of data bytes.
Preconditions:
The proper control signals are initialized for PMP operation.
Process:
1. Ensure that the output buffer to be written is empty by using PLIB_PMP_OutputBufferXIsEmpty.
2. Write the output data buffer using PLIB_PMP_OutputBufferXByteSend.
Example:
uint8_t data;
// Check to see if output buffer is available, then send the byte
if(PLIB_PMP_OutputBufferXIsEmpty( PMP_ID_0, 1))
{
// Fill the output buffer-1 with the data to be sent
PLIB_PMP_OutputBufferXByteSend( PMP_ID_0, 1, value);
}
5.6.16.4.3.5 State Machine
The PMP state machine can be used in either a polled or an interrupt-driven manner. However, in both cases, software must
check the state of the master, slave, and error interrupt flags to identify when a state transition occurs.
Description
The PMP module has one basic interrupt that is triggered when data has been written or read. In Buffered Slave mode, this
interrupt can be set to wait until an 'X' amount of buffers are written or read. This interrupt must be cleared in software, but can
also be used in DMA transactions to trigger the next DMA transfer.
The PMP module will not start generating interrupts (setting the PMP interrupt flags, even if interrupts are disabled) until it is
properly configured and enabled. After that, interrupts are generated as described in subsequent sections. Software has to
respond appropriately once the interrupt has occurred (the flag has been set) to allow the state machine to advance to the next
state. These actions are described in the following sections for the state machine diagram to which they refer.
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Slave Mode State Machine
Slave-Mode State Transitions
In Slave mode, state transitions occur under hardware control automatically or in response to an interrupt. Software must
respond appropriately to ensure that the PMP module continues to operate correctly. Basically, if a read/write strobe occurs, then
the appropriate read/write happens, which in turn sets the interrupt.
Master Mode State Machine
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Master-Mode State Transitions
In Master mode, state transitions occur under hardware control automatically or in response to an interrupt. Software must
respond appropriately to ensure that the PMP module continues to operate correctly. Basically, if an input or output register is
manipulated, the appropriate read/write happens, which in turn sets the interrupt. The PMP module can also be configured to
have read/write strobes indicating whether a read/write has completed.
5.6.16.4.3.6 Handling Errors
There are two basic types of errors that can occur during various slave PMP operations:
• Input Buffer Overrun
• Output Buffer Underflow
This section provides information on handling these types of errors.
Description
Handling Input Buffer Overrun Errors
An input buffer overflow error occurs when the software is not reading or clearing the input buffers fast enough for the master
PMP device attached to it. When this occurs, the master write is not allowed and the "input buffer overflow" status bit is set. This
can be identified by calling PLIB_PMP_InputOverflowHasOccurred. Additional attempts to write to the input buffer will not be
allowed until the overflow error is cleared by calling PLIB_PMP_InputOverflowClear. This type of error should be either avoided
by having proper communication techniques with the PMP Master device or checked using PLIB_PMP_InputBuffersAreFull,
which informs the controller that no buffers have data in them (overflow) .
Interrupts: The input buffer overflow error does not trigger an interrupt.
Handling Output Buffer Underflow Errors
An output buffer underflow error occurs when the software is not writing to the output buffers fast enough for the master PMP
device attached to it. When this occurs, the master read is not allowed and the "output buffer underflow" status bit is set. This
can be identified by calling PLIB_PMP_OutputUnderflowHasOccurred. Additional attempts to read from the output buffer will not
be allowed until the overflow error is cleared by calling PLIB_PMP_OutputUnderflowClear. This sort of error should be either
avoided by having proper communication techniques with the PMP Master device, or checked using
PLIB_PMP_OutputBuffersAreEmpty, which informs the controller that buffers have data in them (underflow) .
Interrupts: The input buffer overflow error does not trigger an interrupt.
5.6.16.4.3.7 Other Features
This section provides information on additional features that may be available. These features are not available on all devices.
Please refer to the "Parallel Master Port (PMP)" chapter in the specific device data sheet to determine which features are
supported by your device.
Description
Operation During Sleep Mode
When the device enters Sleep mode, the system clock is disabled. The consequences of Sleep mode depend on which mode
the PMP module is configured in at the time that Sleep mode is invoked.
Master
If the device enters Sleep mode while the PMP module is operating in Master mode, PMP operation will be suspended in its
current state until clock execution resumes. As this may cause unexpected control pin timings, users should avoid invoking
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Sleep mode when continuous use of the module is needed.
Slave
While the PMP module is inactive, but enabled for any Slave mode operation, any read or write operations occurring at that time
will be able to complete without the use of the microcontroller clock. Once the operation is completed, the module will issue an
interrupt.
This interrupt may be used to wake the device from Sleep or Idle modes, depending on the configuration and capabilities of the
device. Refer to the specific device data sheet or the related peripheral section in the reference manual to determine the
capabilities of your device.
Operation During Idle Mode
When the device enters Idle mode, the system clock sources remain functional and the CPU stops code execution. PMP
operation during Idle mode can be controlled using the PLIB_PMP_StopInIdleEnable or the PLIB_PMP_StopInIdleDisable. By
default, the PMP module continues to operate in Idle mode and provide full functionality.
5.6.16.5 Configuring the Library
The library is configured for the supported PMP Peripheral Library is configured in the MPLAB IDE.
5.6.16.6 Library Interface
Data Types and Constants
Name Description
PMP_ACK_MODE Defines the different mode configurations in which the PMP can
be enabled.
PMP_ADDRESS_HOLD_LATCH_WAIT_STATES PMP hold after address latch strobe wait states configuration.
PMP_ADDRESS_LATCH Address Latch Strobe configuration.
PMP_ADDRESS_LATCH_WAIT_STATES PMP address latch strobe wait states configuration.
PMP_ADDRESS_PORT Defines the different address lines that are available for
configuration.
PMP_ALTERNATE_MASTER_WAIT_STATES PMP alternate master wait states.
PMP_CHIP_SELECT PMP Chip Select data type.
PMP_CHIPSELECT_FUNCTION Defines different functions available for the Chip Select lines
multiplexed with address lines.
PMP_DATA_HOLD_STATES PMP Data Hold after strobe wait state.
PMP_DATA_LENGTH Possible data lengths handled by the PMP module.
PMP_DATA_SIZE PMP data size.
PMP_DATA_WAIT_STATES PMP data setup time configuration.
PMP_INCREMENT_MODE PMP address incrementing configuration.
PMP_INPUT_BUFFER_TYPE PMP Input Buffers type.
PMP_INTERRUPT_MODE PMP interupt request mode data type.
PMP_MASTER_MODE Defines the different mode configurations in which the PMP can
be enabled.
PMP_MODULE_ID Possible instances of the PMP module.
PMP_MUX_MODE Defines the different mode configurations in which the PMP can
be enabled.
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PMP_OPERATION_MODE Defines the different mode configurations in which the PMP can
be enabled.
PMP_PMBE_PORT Defines the available Byte Enable ports.
PMP_POLARITY_LEVEL Possible polarity levels for the PMP pins.
PMP_STROBE_WAIT_STATES PMP strobe signal wait time configuration.
Address Handling Functions
Name Description
PLIB_PMP_AddressGet Gets the current address of the PMP module.
PLIB_PMP_AddressLinesA0A1Get Gets the value of the address lines PMA0 and PMA1.
PLIB_PMP_AddressLinesA0A1Set Sets the address lines PMA0 and PMA1 with the value specified.
PLIB_PMP_AddressSet Sets the current address of the PMP module to the specified address.
Data Read and Write Functions
Name Description
PLIB_PMP_InputBuffersAreFull Gets the state of the input buffers.
PLIB_PMP_InputBufferXByteReceive Data to be received in Byte mode.
PLIB_PMP_InputBufferXIsFull Gets the state of the identified input buffer.
PLIB_PMP_IsDataReceived Checks and returns if the data has been received in the specified buffer in
Slave mode.
PLIB_PMP_IsDataTransmitted Checks and returns if the data has been transmitted from the specified
buffer in Slave mode.
PLIB_PMP_MasterReceive Receives the data in the master mode.
PLIB_PMP_MasterSend Sends the specified data in Master mode.
PLIB_PMP_OutputBuffersAreEmpty Gets the state of the output buffers.
PLIB_PMP_OutputBufferXByteSend Data to be transmitted in Byte mode.
PLIB_PMP_OutputBufferXIsEmpty Gets the state of the input buffer.
PLIB_PMP_SlaveReceive Receives the data in Slave mode.
PLIB_PMP_SlaveSend Sends the specified data in Slave mode.
Enhanced Address Handling Functions
Name Description
PLIB_PMP_ChipXBaseAddressSet Sets the base address of the specified device.
PLIB_PMP_ReservedAddressSpaceBitsSet Sets the address bits of the reserved address space of the EPMP.
The end address of the Chip Select-2 (if present).
Enhanced Error/Status Control Functions
Name Description
PLIB_PMP_TransactionErrorClear Clears the transaction error flag.
PLIB_PMP_TransactionErrorHasOccurred Returns the status of a transaction error.
PLIB_PMP_TransactionHasTimedOut Returns the time-out status.
PLIB_PMP_TransactionTimeoutClear Clears the time-out flag.
Enhanced General Initialization Functions
Name Description
PLIB_PMP_BusKeeperDisable Disables the bus keeper (high-impedance) state.
PLIB_PMP_BusKeeperEnable Enables the bus keeper (high-impedance) state.
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PLIB_PMP_ChipSelectXEnableStrobeDeSelect Selects the read and write strobes. The enable strobe is not
selected (not required).
PLIB_PMP_ChipSelectXEnableStrobeSelect Selects the read/write and enable strobes.
PLIB_PMP_SmartAddressStrobeDisable Disables "smart" address strobes.
PLIB_PMP_SmartAddressStrobeEnable Enables "smart" address strobes.
PLIB_PMP_ChipXAckModeSelect Selects the acknowledge mode for the PMP module.
PLIB_PMP_ChipXDataSizeSelect Enables data transfer size for the PMP for the specified device.
PLIB_PMP_EnhancedMasterModeSelect Selects Master mode for the PMP module.
Enhanced General Status Functions
Name Description
PLIB_PMP_AlternateMasterHasAccess Gets the status of which alternate masters have gained access to the
PMP module.
PLIB_PMP_AlternateMasterRequestStatus Gets the status of the request from the alternate master.
Enhanced Polarity Configuration Functions
Name Description
PLIB_PMP_ChipSelectXAckPolaritySelect Sets the Chip Select acknowledge polarity.
PLIB_PMP_ChipSelectXByteEnablePortPolaritySelect Sets the nibble/byte enable polarity.
PLIB_PMP_ChipSelectXReadWriteStrobePolaritySelect Sets the read/write strobe polarity.
PLIB_PMP_ChipSelectXWriteEnableStrobePolaritySelect Sets the write/enable strobe polarity.
Enhanced Port Configuration Functions
Name Description
PLIB_PMP_ChipSelectXPortDisable Disables the specified Chip Select's port.
PLIB_PMP_ChipSelectXPortEnable Enables the specified Chip Select's port.
Enhanced Wait States Initialization Functions
Name Description
PLIB_PMP_ChipXWaitStatesAlternateMasterSelect Selects the wait states of the alternate master for Chip
Select-X.
PLIB_PMP_ChipXWaitStatesDataHoldSelect Configures the data hold states (after data transfer) needed to
be used with the PMP module for the specified device.
PLIB_PMP_ChipXWaitStatesDataSetupSelect Configures the data wait states (before the data transfer)
needed to be used with the PMP module for the specified
device.
PLIB_PMP_ChipXWaitStatesStrobeSelect Configures the strobe wait states (during the data transfer)
needed to be used with the PMP module for the specified
device.
PLIB_PMP_WaitStatesAddressHoldStrobeSelect Configures the address wait states needed to be used with
the PMP module.
PLIB_PMP_WaitStatesAddressLatchStrobeSelect Configures the address wait states needed to be used with
the PMP module.
Error Status/Control Functions
Name Description
PLIB_PMP_InputOverflowClear Clears a PMP Overflow error.
PLIB_PMP_OutputUnderflowClear Clears a PMP output underflow error.
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Feature Existence Functions
Name Description
PLIB_PMP_ExistsAddressControl Identifies that the AddressControl feature exists on the PMP
module.
PLIB_PMP_ExistsAddressLatchPolarity Identifies that the AddressLatchPolarity feature exists on the
PMP module.
PLIB_PMP_ExistsAddressLatchStrobePortControl Identifies that the AddressLatchStrobePortControl feature
exists on the PMP module.
PLIB_PMP_ExistsAddressPortPinControl Identifies that the AddressPortPinControl feature exists on the
PMP module.
PLIB_PMP_ExistsAltMasterRequest Identifies that the AltMasterRequest feature exists on the PMP
module.
PLIB_PMP_ExistsBufferOverFlow Identifies that the BufferOverFlow feature exists on the PMP
module.
PLIB_PMP_ExistsBufferRead Identifies that the BufferRead feature exists on the PMP
module.
PLIB_PMP_ExistsBufferType Identifies that the BufferType feature exists on the PMP module.
PLIB_PMP_ExistsBufferUnderFlow Identifies that the BufferUnderFlow feature exists on the PMP
module.
PLIB_PMP_ExistsBufferWrite Identifies that the BufferWrite feature exists on the PMP module.
PLIB_PMP_ExistsBusKeeper Identifies that the BusKeeper feature exists on the PMP module.
PLIB_PMP_ExistsBusyStatus Identifies that the BusyStatus feature exists on the PMP
module.
PLIB_PMP_ExistsByteEnablePolarity Identifies that the ByteEnablePolarity feature exists on the PMP
module.
PLIB_PMP_ExistsByteEnablePortControl Identifies that the ByteEnablePortControl feature exists on the
PMP module.
PLIB_PMP_ExistsChipSelectEnable Identifies that the ChipSelectEnable feature exists on the PMP
module.
PLIB_PMP_ExistsChipSelectoperation Identifies that the ChipSelectoperation feature exists on the
PMP module.
PLIB_PMP_ExistsChipXACKMode Identifies that the ChipXACKMode feature exists on the PMP
module.
PLIB_PMP_ExistsChipXACKPolarity Identifies that the ChipXACKPolarity feature exists on the PMP
module.
PLIB_PMP_ExistsChipXAltMasterWaitStates Identifies that the ChipXAltMasterWaitStates feature exists on
the PMP module.
PLIB_PMP_ExistsChipXBaseAddress Identifies that the ChipXBaseAddress feature exists on the
PMP module.
PLIB_PMP_ExistsChipXByteEnablePolarity Identifies that the ChipXByteEnablePolarity feature exists on
the PMP module.
PLIB_PMP_ExistsChipXDataHoldWaitStates Identifies that the ChipXDataHoldWaitStates feature exists on
the PMP module.
PLIB_PMP_ExistsChipXDataSetupWaitStates Identifies that the ChipXDataSetupWaitStates feature exists on
the PMP module.
PLIB_PMP_ExistsChipXDataSize Identifies that the ChipXDataSize feature exists on the PMP
module.
PLIB_PMP_ExistsChipXEnableStorbeSelect Identifies that the ChipXEnableStorbeSelect feature exists on
the PMP module.
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PLIB_PMP_ExistsChipXPolarity Identifies that the ChipXPolarity feature exists on the PMP
module.
PLIB_PMP_ExistsChipXReadWritePolarity Identifies that the ChipXReadWritePolarity feature exists on the
PMP module.
PLIB_PMP_ExistsChipXStrobeWaitStates Identifies that the ChipXStrobeWaitStates feature exists on the
PMP module.
PLIB_PMP_ExistsChipXWriteEnablePolarity Identifies that the ChipXWriteEnablePolarity feature exists on
the PMP module.
PLIB_PMP_ExistsCSXActiveStatus Identifies that the CSXActiveStatus feature exists on the PMP
module.
PLIB_PMP_ExistsCSXPortControl Identifies that the CSXPortControl feature exists on the PMP
module.
PLIB_PMP_ExistsCurrentMaster Identifies that the CurrentMaster feature exists on the PMP
module.
PLIB_PMP_ExistsDataHoldWaitStates Identifies that the DataHoldWaitStates feature exists on the
PMP module.
PLIB_PMP_ExistsDataSetUpWaitStates Identifies that the DataSetUpWaitStates feature exists on the
PMP module.
PLIB_PMP_ExistsDataStrobeWaitStates Identifies that the DataStrobeWaitStates feature exists on the
PMP module.
PLIB_PMP_ExistsDataTransferSize Identifies that the DataTransferSize feature exists on the PMP
module.
PLIB_PMP_ExistsEnableControl Identifies that the EnableControl feature exists on the PMP
module.
PLIB_PMP_ExistsEnhancedMasterMode Identifies that the EnhancedMasterMode feature exists on the
PMP module.
PLIB_PMP_ExistsIncrementMode Identifies that the IncrementMode feature exists on the PMP
module.
PLIB_PMP_ExistsInputBufferFull Identifies that the InputBufferFull feature exists on the PMP
module.
PLIB_PMP_ExistsInputBufferXStatus Identifies that the InputBufferXStatus feature exists on the PMP
module.
PLIB_PMP_ExistsInterruptMode Identifies that the InterruptMode feature exists on the PMP
module.
PLIB_PMP_ExistsMasterRXTX Identifies that the MasterRXTX feature exists on the PMP
module.
PLIB_PMP_ExistsMUXModeSelect Identifies that the MUXModeSelect feature exists on the PMP
module.
PLIB_PMP_ExistsOperationMode Identifies that the OperationMode feature exists on the PMP
module.
PLIB_PMP_ExistsOutPutBufferEmpty Identifies that the OutPutBufferEmpty feature exists on the
PMP module.
PLIB_PMP_ExistsOutputBufferXStatus Identifies that the OutputBufferXStatus feature exists on the
PMP module.
PLIB_PMP_ExistsReadWritePolarity Identifies that the ReadWritePolarity feature exists on the PMP
module.
PLIB_PMP_ExistsReadWriteStrobePortControl Identifies that the ReadWriteStrobePortControl feature exists
on the PMP module.
PLIB_PMP_ExistsReservedAddrSpace Identifies that the ReservedAddrSpace feature exists on the
PMP module.
PLIB_PMP_ExistsSlaveRX Identifies that the SlaveRX feature exists on the PMP module.
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PLIB_PMP_ExistsSlaveTX Identifies that the SlaveTX feature exists on the PMP module.
PLIB_PMP_ExistsSmartAddress Identifies that the SmartAddress feature exists on the PMP
module.
PLIB_PMP_ExistsStopInIdleControl Identifies that the StopInIdleControl feature exists on the PMP
module.
PLIB_PMP_ExistsTransactionError Identifies that the TransactionError feature exists on the PMP
module.
PLIB_PMP_ExistsTransactionTimeOut Identifies that the TransactionTimeOut feature exists on the
PMP module.
PLIB_PMP_ExistsWaitStatesAddrHoldStrobe Identifies that the WaitStatesAddrHoldStrobe feature exists on
the PMP module.
PLIB_PMP_ExistsWaitStatesAddrLatchStrobe Identifies that the WaitStatesAddrLatchStrobe feature exists on
the PMP module.
PLIB_PMP_ExistsWriteEnablePolarity Identifies that the WriteEnablePolarity feature exists on the
PMP module.
PLIB_PMP_ExistsWriteEnablePortControl Identifies that the WriteEnablePortControl feature exists on the
PMP module.
General Initialization Functions
Name Description
PLIB_PMP_AddressIncrementModeGet Gets the increment mode being used with the address of the PMP
module.
PLIB_PMP_AddressIncrementModeSelect Configures the increment mode being used with the address of the
PMP module.
PLIB_PMP_AddressLatchStrobeDisable Disables the specific address latch strobe.
PLIB_PMP_AddressLatchStrobeEnable Enables the specific address latch strobe.
PLIB_PMP_ChipSelectFunctionSelect Defines the functionality of the pins intended to be used as Chip Select.
PLIB_PMP_ChipSelectXDisable Configures the Chip Select.
PLIB_PMP_ChipSelectXEnable Configures the Chip Select.
PLIB_PMP_ChipSelectXIsActive Gets the current status of the specified Chip Select.
PLIB_PMP_DataSizeSelect Enables data transfer size for the PMP module.
PLIB_PMP_Disable Disables the specific PMP module.
PLIB_PMP_Enable Enables the specific PMP module.
PLIB_PMP_InputBufferTypeSelect Selects the input buffer based on the input passed.
PLIB_PMP_InterruptModeGet Gets the current configured interrupt mode being used with the PMP
module.
PLIB_PMP_InterruptModeSelect Configures the interrupt request mode being used with the PMP
module.
PLIB_PMP_MultiplexModeGet Gets the current multiplexing mode configured between the address
and data of the PMP module.
PLIB_PMP_MultiplexModeSelect Configures the multiplexing between the address and data of the PMP
module.
PLIB_PMP_OperationModeGet Gets the current operation mode of the PMP module.
PLIB_PMP_OperationModeSelect Configures the operation mode of the PMP module.
PLIB_PMP_StopInIdleDisable Enables the PMP module to continue operation in Idle mode.
PLIB_PMP_StopInIdleEnable Discontinues PMP module operation when the device enters Idle mode.
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General Status Functions
Name Description
PLIB_PMP_IsEnabled Checks whether or not the PMP module is enabled.
PLIB_PMP_PortIsBusy Identifies if the (Master mode) PMP port is busy.
PLIB_PMP_InputOverflowHasOccurred Identifies if there was a receiver overflow error.
PLIB_PMP_OutputUnderflowHasOccurred Identifies if there was an output buffer sent out with no data.
Polarity Configuration Functions
Name Description
PLIB_PMP_AddressLatchPolaritySelect Sets the address latch strobe polarity.
PLIB_PMP_ByteEnablePolaritySelect Sets the byte enable polarity.
PLIB_PMP_ChipSelectXPolaritySelect Sets the specified Chip Select polarity.
PLIB_PMP_ReadWriteStrobePolaritySelect Sets the polarity of the read strobe.
PLIB_PMP_WriteEnableStrobePolaritySelect Sets the polarity of the write enable strobe.
Port Configuration Functions
Name Description
PLIB_PMP_AddressPortDisable Disables the port lines specified as PMP address lines.
PLIB_PMP_AddressPortEnable Enables the port lines specified as PMP address lines.
PLIB_PMP_ByteEnablePortDisable Disables the byte enable port.
PLIB_PMP_ByteEnablePortEnable Enables the byte enable port.
PLIB_PMP_ReadWriteStrobePortDisable Disables the PMP module read strobe port.
PLIB_PMP_ReadWriteStrobePortEnable Enables the PMP module read strobe port.
PLIB_PMP_WriteEnableStrobePortDisable Disables the PMP module write strobe port.
PLIB_PMP_WriteEnableStrobePortEnable Enables the PMP module write strobe port.
Wait States Initialization Functions
Name Description
PLIB_PMP_WaitStatesDataHoldSelect Configures the data hold states (after data transfer) needed to be used
with the PMP module.
PLIB_PMP_WaitStatesDataSetUpSelect Configures the data wait states (before the data transfer) needed to be
used with the PMP module.
PLIB_PMP_WaitStatesStrobeSelect Configures the strobe wait states (during the data transfer) needed to be
used with the PMP module.
Description
The PMP peripheral library consists of a set of interface routines, data types and constants, and macros provided by the
plib_pmp.h header file. This section describes those items.
5.6.16.6.1 General Initialization Functions
5.6.16.6.1.1 PLIB_PMP_AddressIncrementModeGet Function
C
PMP_INCREMENT_MODE PLIB_PMP_AddressIncrementModeGet(
PMP_MODULE_ID index
);
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Description
This function gets the pins used by the PMP module. Refer to the enumeration PMP_INCREMENT_MODE for the possible
settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
PMP_INCREMENT_MODE - One of the possible values from PMP_INCREMENT_MODE
Remarks
This function implements an operation of the IncrementMode feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsIncrementMode in your application to to
automatically determine whether this feature is available.
Example
PMP_INCREMENT_MODE curAddressIncMode;
curAddressIncMode = PLIB_PMP_AddressIncrementModeGet( PMP_ID_0 );
5.6.16.6.1.2 PLIB_PMP_AddressIncrementModeSelect Function
C
void PLIB_PMP_AddressIncrementModeSelect(
PMP_MODULE_ID index,
PMP_INCREMENT_MODE incrementMode
);
Description
This function configures the pins used by the PMP module. Refer to the enumeration PMP_INCREMENT_MODE for the possible
settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
incrementMode One of the possible values from PMP_INCREMENT_MODE
Returns
None.
Remarks
This function implements an operation of the IncrementMode feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsIncrementMode in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_AddressIncrementModeSelect( PMP_ID_0, PMP_ADDRESS_INCREMENT_DECREMENT_DISABLE );
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5.6.16.6.1.3 PLIB_PMP_AddressLatchStrobeDisable Function
C
void PLIB_PMP_AddressLatchStrobeDisable(
PMP_MODULE_ID index,
PMP_ADDRESS_LATCH latch
);
Description
This function disables the PMP module with a specific address latch strobe depending on which strobes are not needed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
latch Identifier for the latch to be disabled
Returns
None.
Remarks
This function implements an operation of the AddressLatchStrobePortControl feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsAddressLatchStrobePortControl in your application to to automatically determine whether this feature is
available.
Example
PLIB_PMP_AddressLatchStrobeDisable( PMP_ID_0, PMP_ADDRESS_LATCH_UPPER );
PLIB_PMP_AddressLatchStrobeDisable( PMP_ID_0, PMP_ADDRESS_LATCH_HIGH );
PLIB_PMP_AddressLatchStrobeDisable( PMP_ID_0, PMP_ADDRESS_LATCH_LOW );
5.6.16.6.1.4 PLIB_PMP_AddressLatchStrobeEnable Function
C
void PLIB_PMP_AddressLatchStrobeEnable(
PMP_MODULE_ID index,
PMP_ADDRESS_LATCH latch
);
Description
This function enables the PMP module with a specific address latch strobe depending on which strobes are needed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
latch Identifier for the latch to be enabled
Returns
None.
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Remarks
This function implements an operation of the AddressLatchStrobePortControl feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsAddressLatchStrobePortControl in your application to to automatically determine whether this feature is
available.
Example
PLIB_PMP_AddressLatchStrobeEnable( PMP_ID_0, PMP_ADDRESS_LATCH_UPPER );
PLIB_PMP_AddressLatchStrobeEnable( PMP_ID_0, PMP_ADDRESS_LATCH_HIGH );
PLIB_PMP_AddressLatchStrobeEnable( PMP_ID_0, PMP_ADDRESS_LATCH_LOW );
5.6.16.6.1.5 PLIB_PMP_ChipSelectFunctionSelect Function
C
void PLIB_PMP_ChipSelectFunctionSelect(
PMP_MODULE_ID index,
PMP_CHIPSELECT_FUNCTION chipselfunct
);
Description
This function selects the PMCS1/PMCS2 as either Chip Select or as address lines depending on the way these bits are
programmed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipselfunct One of the possible values from PMP_CHIPSELECT_FUNCTION
Returns
None.
Remarks
This function implements an operation of the ChipSelectoperation feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipSelectoperation in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ChipSelectFunctionSelect( PMP_ID_0, PMCS1_PMCS2_AS_ADDRESS_LINES );
5.6.16.6.1.6 PLIB_PMP_ChipSelectXDisable Function
C
void PLIB_PMP_ChipSelectXDisable(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect
);
Description
This function configures the Chip Select(s) being used by the PMP module. The specified Chip Select pin functions as the
address pin.
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect Identifier for which Chip Select to configure
Returns
None.
Remarks
This function implements an operation of the ChipSelectEnable feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipSelectEnable in your application to
to automatically determine whether this feature is available.
Example
PMP_CHIP_SELECT chipSelect = PMP_CHIP_SELECT_ONE;
PLIB_PMP_ChipSelectXDisable( PMP_ID_0, chipSelect );
5.6.16.6.1.7 PLIB_PMP_ChipSelectXEnable Function
C
void PLIB_PMP_ChipSelectXEnable(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect
);
Description
This function configures the Chip Select(s) being used by the PMP module. The specified Chip Select pin functions as
ChipSelect.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect Identifier for which Chip Select to configure
Returns
None.
Remarks
This function implements an operation of the ChipSelectEnable feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipSelectEnable in your application to
to automatically determine whether this feature is available.
Example
PMP_CHIP_SELECT chipSelect = PMP_CHIP_SELECT_ONE;
PLIB_PMP_ChipSelectXEnable( PMP_ID_0, chipSelect );
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5.6.16.6.1.8 PLIB_PMP_ChipSelectXIsActive Function
C
bool PLIB_PMP_ChipSelectXIsActive(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect
);
Description
This function gets the current status of the specified Chip Select.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect Identifier for the Chip Select to be checked
Returns
• true - Chip Select is active
• false - Chip Select is not active
Remarks
This function implements an operation of the CSXActiveStatus feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsCSXActiveStatus in your application to to
automatically determine whether this feature is available.
Example
PMP_CHIP_SELECT chipSelect = PMP_CHIP_SELECT_ONE;
if(PLIB_PMP_ChipSelectXIsActive( PMP_ID_0, chipSelect ))
{
//Do something useful
}
5.6.16.6.1.9 PLIB_PMP_DataSizeSelect Function
C
void PLIB_PMP_DataSizeSelect(
PMP_MODULE_ID index,
PMP_DATA_SIZE size
);
Description
This function enables 4-bit, 8-bit, or 16-bit data transfer for the PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
size Identifier for the data size to be used
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Returns
None.
Remarks
This function implements an operation of the DataTransferSize feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsDataTransferSize in your application to
to automatically determine whether this feature is available.
Example
PLIB_PMP_DataSizeSelect( PMP_ID_0, PMP_DATA_SIZE_8_BITS );
5.6.16.6.1.10 PLIB_PMP_Disable Function
C
void PLIB_PMP_Disable(
PMP_MODULE_ID index
);
Description
This function disables the specific PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
The default state after any reset for a PMP module is the disable state. If the PMP is disabled, all the related pins are in control
of the general purpose I/O logic.
Disabling the PMP module resets the buffers to empty states. Any data characters in the buffers are lost. All error and status bits
are also reset.
Disabling the PMP while the PMP is active, will abort all pending transmissions and receptions. Re-enabling the PMP will restart
the module in the same configuration.
When disabled, the PMP power consumption is minimal.
This function implements an operation of the EnableControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsEnableControl in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_Disable( PMP_ID_0 );
5.6.16.6.1.11 PLIB_PMP_Enable Function
C
void PLIB_PMP_Enable(
PMP_MODULE_ID index
);
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Description
This function enables the specific PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the EnableControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsEnableControl in your application to
automatically determine whether this feature is available.
Example
PLIB_PMP_Enable( PMP_ID_0 );
5.6.16.6.1.12 PLIB_PMP_InputBufferTypeSelect Function
C
void PLIB_PMP_InputBufferTypeSelect(
PMP_MODULE_ID index,
PMP_INPUT_BUFFER_TYPE inputBuffer
);
Description
This function selects the input buffer based on the input passed. Either TTL or Schmitt Trigger input buffers are selected.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
inputBuffer One of the possible input buffer types
Returns
None.
Remarks
This function implements an operation of the BufferType feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_PMP_ExistsBufferType in your application to to automatically
determine whether this feature is available.
Example
PLIB_PMP_InputBufferTypeSelect( PMP_ID_0, PMP_INPUT_BUFFER_TTL );
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5.6.16.6.1.13 PLIB_PMP_InterruptModeGet Function
C
PMP_INTERRUPT_MODE PLIB_PMP_InterruptModeGet(
PMP_MODULE_ID index
);
Description
This function gets the current configured interrupt mode being used with the PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
One of the possible values from PMP_INTERRUPT_MODE.
Remarks
This function implements an operation of the InterruptMode feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsInterruptMode in your application to to
automatically determine whether this feature is available.
Example
PMP_INTERRUPT_MODE currentIntMode;
currentIntMode = PLIB_PMP_InterruptModeGet ( PMP_ID_0 );
5.6.16.6.1.14 PLIB_PMP_InterruptModeSelect Function
C
void PLIB_PMP_InterruptModeSelect(
PMP_MODULE_ID index,
PMP_INTERRUPT_MODE interruptMode
);
Description
This function configures the pins used by the PMP module. Refer to the enumeration PMP_INTERRUPT_MODE for the possible
settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
interruptMode One of the possible values from PMP_INTERRUPT_MODE
Returns
None.
Remarks
This function implements an operation of the InterruptMode feature. This feature may not be available on all devices. Please
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refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsInterruptMode in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_InterruptModeSelect( PMP_ID_0, PMP_INTERRUPT_NONE );
5.6.16.6.1.15 PLIB_PMP_MultiplexModeGet Function
C
PMP_MUX_MODE PLIB_PMP_MultiplexModeGet(
PMP_MODULE_ID index
);
Description
This function gets the current multiplexing mode configured between the address and data of the PMP module.
Preconditions
None.
Returns
index - Identifier for the device instance to be addressed PMP_MUX_MODE - One of the possible values from
PMP_MUX_MODE
Remarks
This function implements an operation of the MUXModeSelect feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsMUXModeSelect in your application to to
automatically determine whether this feature is available.
Example
PMP_MUX_MODE currentMuxMode;
currentMuxMode = PLIB_PMP_MultiplexModeGet( PMP_ID_0 );
5.6.16.6.1.16 PLIB_PMP_MultiplexModeSelect Function
C
void PLIB_PMP_MultiplexModeSelect(
PMP_MODULE_ID index,
PMP_MUX_MODE multiplexMode
);
Description
This function configures the pins used by the PMP module. Refer to the enumeration PMP_MUX_MODE for the possible settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
multiplexMode One of the possible values from the PMP_MUX_MODE
Returns
None.
Remarks
This function implements an operation of the MUXModeSelect feature. This feature may not be available on all devices. Please
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refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsMUXModeSelect in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_MultiplexModeSelect( PMP_ID_0, PMP_MUX_NONE );
5.6.16.6.1.17 PLIB_PMP_OperationModeGet Function
C
PMP_OPERATION_MODE PLIB_PMP_OperationModeGet(
PMP_MODULE_ID index
);
Description
This function gets the current operation mode of the PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
PMP_OPERATION_MODE - One of the possible values from PMP_OPERATION_MODE
Remarks
This function implements an operation of the OperationMode feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsOperationMode in your application to to
automatically determine whether this feature is available.
Example
PMP_OPERATION_MODE curOpMode;
curOpMode = PLIB_PMP_OperationModeGet( PMP_ID_0 );
5.6.16.6.1.18 PLIB_PMP_OperationModeSelect Function
C
void PLIB_PMP_OperationModeSelect(
PMP_MODULE_ID index,
PMP_OPERATION_MODE operationMode
);
Description
This function configures operation mode of the PMP module. Refer to the enumeration PMP_OPERATION_MODE for the
possible settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
operationMode One of the possible values from PMP_OPERATION_MODE
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Returns
None.
Remarks
This function implements an operation of the OperationMode feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsOperationMode in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_OperationModeSelect( PMP_ID_0,
PMP_MASTER_READ_WRITE_STROBES_MULTIPLEXED );
5.6.16.6.1.19 PLIB_PMP_StopInIdleDisable Function
C
void PLIB_PMP_StopInIdleDisable(
PMP_MODULE_ID index
);
Description
This function disables the stop in idle flag. The PMP module continues operation in Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
By default, the PMP module will continue operation in Idle mode.
This function implements an operation of the StopInIdleControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsStopInIdleControl in your application to
to automatically determine whether this feature is available.
Example
PLIB_PMP_StopInIdleDisable( PMP_ID_0 );
5.6.16.6.1.20 PLIB_PMP_StopInIdleEnable Function
C
void PLIB_PMP_StopInIdleEnable(
PMP_MODULE_ID index
);
Description
This function enables the PMP module to discontinue operation when the device enters Idle mode.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the StopInIdleControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsStopInIdleControl in your application to
to automatically determine whether this feature is available.
Example
PLIB_PMP_StopInIdleEnable( PMP_ID_0 );
5.6.16.6.2 Enhanced General Initialization Functions
5.6.16.6.2.1 PLIB_PMP_BusKeeperDisable Function
C
void PLIB_PMP_BusKeeperDisable(
PMP_MODULE_ID index
);
Description
The data bus can be kept in a high-impedance state when not actively being driven. This function disables this "bus keeper"
state.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the BusKeeper feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_PMP_ExistsBusKeeper in your application to to automatically
determine whether this feature is available.
Example
PLIB_PMP_BusKeeperDisable ( PMP_ID_0 );
5.6.16.6.2.2 PLIB_PMP_BusKeeperEnable Function
C
void PLIB_PMP_BusKeeperEnable(
PMP_MODULE_ID index
);
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Description
The data bus can be kept in a high-impedance state when not actively being driven. This function enables this "bus keeper" state.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the BusKeeper feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_PMP_ExistsBusKeeper in your application to to automatically
determine whether this feature is available.
Example
PLIB_PMP_BusKeeperEnable ( PMP_ID_0 );
5.6.16.6.2.3 PLIB_PMP_ChipSelectXEnableStrobeDeSelect Function
C
void PLIB_PMP_ChipSelectXEnableStrobeDeSelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect
);
Description
This function selects the read and write strobes. The read and write strobes have independent lines.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect One of the possible values from PMP_CHIP_SELECT
Returns
None.
Remarks
This function implements an operation of the ChipXEnableStorbeSelect feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXEnableStorbeSelect in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ChipSelectXEnableStrobeDeSelect ( PMP_ID_0, PMP_CHIP_SELECT_ONE );
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5.6.16.6.2.4 PLIB_PMP_ChipSelectXEnableStrobeSelect Function
C
void PLIB_PMP_ChipSelectXEnableStrobeSelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect
);
Description
This function selects the read/write and enable strobes. The read and write strobes share a common line. A separate enable line
is provided to differentiate between read and write operations.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect One of the possible values from PMP_CHIP_SELECT
Returns
None.
Remarks
This function implements an operation of the ChipXEnableStorbeSelect feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXEnableStorbeSelect in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ChipSelectXEnableStrobeSelect ( PMP_ID_0, PMP_CHIP_SELECT_ONE );
5.6.16.6.2.5 PLIB_PMP_SmartAddressStrobeDisable Function
C
void PLIB_PMP_SmartAddressStrobeDisable(
PMP_MODULE_ID index
);
Description
This function disables "smart" address strobes (each address phase is only present if the current access would cause a different
address in the latch than the previous address).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the SmartAddress feature. This feature may not be available on all devices. Please
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refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsSmartAddress in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_SmartAddressStrobeDisable ( PMP_ID_0 );
5.6.16.6.2.6 PLIB_PMP_SmartAddressStrobeEnable Function
C
void PLIB_PMP_SmartAddressStrobeEnable(
PMP_MODULE_ID index
);
Description
This function enables "smart" address strobes (each address phase is only present if the current access would cause a different
address in the latch than the previous address).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the SmartAddress feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsSmartAddress in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_SmartAddressStrobeEnable ( PMP_ID_0 );
5.6.16.6.2.7 PLIB_PMP_ChipXAckModeSelect Function
C
void PLIB_PMP_ChipXAckModeSelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect,
PMP_ACK_MODE mode
);
Description
This function sets the acknowledge for the PMP module. Either enables, disables, or enables it with time-out. See the
PMP_ACK_MODE enumeration for additional information.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
mode Identifier for the acknowledge mode to be selected
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chipSelect One of the possible values from PMP_CHIP_SELECT
Returns
None.
Remarks
This function implements an operation of the ChipXACKMode feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXACKMode in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_ChipXAckModeSelect ( PMP_ID_0, PMP_CHIP_SELECT_ONE, PMP_ACK_DISABLED );
5.6.16.6.2.8 PLIB_PMP_ChipXDataSizeSelect Function
C
void PLIB_PMP_ChipXDataSizeSelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect,
PMP_DATA_SIZE size
);
Description
This function enables 4-bit, 8-bit, or 16-bit data transfer for the PMP for the specified device.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
size Identifier for the data size to be used
chipSelect One of the possible values from PMP_CHIP_SELECT
Returns
None.
Remarks
This function implements an operation of the ChipXDataSize feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXDataSize in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_ChipXDataSizeSelect( PMP_ID_0,
PMP_CHIP_SELECT_ONE,
PMP_DATA_SIZE_8_BITS );
5.6.16.6.2.9 PLIB_PMP_EnhancedMasterModeSelect Function
C
void PLIB_PMP_EnhancedMasterModeSelect(
PMP_MODULE_ID index,
PMP_MASTER_MODE master
);
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Description
This function sets the PMP module for Master mode (either CPU or alternate master). The alternate master can have direct I/O
access.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
master Identifier for the master to be selected
Returns
None.
Remarks
This function implements an operation of the EnhancedMasterMode feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsEnhancedMasterMode in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_EnhancedMasterModeSelect ( PMP_ID_0, PMP_CPU_MASTER );
5.6.16.6.3 General Status Functions
5.6.16.6.3.1 PLIB_PMP_IsEnabled Function
C
bool PLIB_PMP_IsEnabled(
PMP_MODULE_ID index
);
Description
This function checks whether or not the PMP module is enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
• true - If the PMP module is enabled
• false - if the PMP module is disabled
Remarks
This function implements an operation of the EnableControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsEnableControl in your application to to
automatically determine whether this feature is available.
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Example
bool pmpStatus;
pmpStatus = PLIB_PMP_IsEnabled( PMP_ID_0 );
5.6.16.6.3.2 PLIB_PMP_PortIsBusy Function
C
bool PLIB_PMP_PortIsBusy(
PMP_MODULE_ID index
);
Description
This function identifies if the PMP port is busy (in Master mode).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
• true - If the port is busy
• false - If the port is not busy
Remarks
Works only in Master mode. This function implements an operation of the BusyStatus feature. This feature may not be available
on all devices. Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsBusyStatus in
your application to to automatically determine whether this feature is available.
Example
bool status;
status = PLIB_PMP_PortIsBusy( PMP_ID_0 );
5.6.16.6.3.3 PLIB_PMP_InputOverflowHasOccurred Function
C
bool PLIB_PMP_InputOverflowHasOccurred(
PMP_MODULE_ID index
);
Description
This function identifies if there was a receiver overflow error.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
• true - If the input buffer has overflowed
• false - If the input buffer has not overflowed
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Remarks
This function implements an operation of the BufferOverFlow feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsBufferOverFlow in your application to to
automatically determine whether this feature is available.
Example
if(PLIB_PMP_InputOverflowHasOccurred( PMP_ID_0 ))
{
PLIB_PMP_InputOverflowClear( PMP_ID_0 );
}
5.6.16.6.3.4 PLIB_PMP_OutputUnderflowHasOccurred Function
C
bool PLIB_PMP_OutputUnderflowHasOccurred(
PMP_MODULE_ID index
);
Description
This function identifies if there was a output buffer was sent out with no data.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
• true - If the input buffer was empty when data was sent
• false - If the output buffer was not empty when data was sent
Remarks
This function implements an operation of the BufferUnderFlow feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsBufferUnderFlow in your application to to
automatically determine whether this feature is available.
Example
if(PLIB_PMP_OutputUnderflowHasOccurred( PMP_ID_0 ))
{
PLIB_PMP_OutputUnderflowClear( PMP_ID_0 );
}
5.6.16.6.4 Enhanced General Status Functions
5.6.16.6.4.1 PLIB_PMP_AlternateMasterHasAccess Function
C
bool PLIB_PMP_AlternateMasterHasAccess(
PMP_MODULE_ID index
);
Description
This function gets the status of the alternate masters that have gained access to the PMP module, whether or not the alternate
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master has access to the PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
• true - If the alternate master has gained access to the PMP module
• false - If the CPU has gained access to the PMP module
Remarks
This function implements an operation of the CurrentMaster feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsCurrentMaster in your application to to
automatically determine whether this feature is available.
Example
status = PLIB_PMP_AlternateMasterHasAccess ( PMP_ID_0 );
5.6.16.6.4.2 PLIB_PMP_AlternateMasterRequestStatus Function
C
bool PLIB_PMP_AlternateMasterRequestStatus(
PMP_MODULE_ID index
);
Description
This function gets the status of the request from the alternate master, whether or not the master is requesting use of the PMP
module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
• true - If the alternate master is requesting use of the PMP module
• false - If the alternate master is not a making request for the PMP module
Remarks
This function implements an operation of the AltMasterRequest feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsAltMasterRequest in your application to
to automatically determine whether this feature is available.
Example
status = PLIB_PMP_AlternateMasterRequestStatus ( PMP_ID_0 );
5.6.16.6.5 Error Status/Control Functions
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5.6.16.6.5.1 PLIB_PMP_InputOverflowClear Function
C
void PLIB_PMP_InputOverflowClear(
PMP_MODULE_ID index
);
Description
This function clears an overflow error. Clearing the error resets the receive buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the BufferOverFlow feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsBufferOverFlow in your application to to
automatically determine whether this feature is available.
Example
if(PLIB_PMP_InputOverflowHasOccurred( PMP_ID_0 ))
{
PLIB_PMP_InputOverflowClear( PMP_ID_0 );
}
5.6.16.6.5.2 PLIB_PMP_OutputUnderflowClear Function
C
void PLIB_PMP_OutputUnderflowClear(
PMP_MODULE_ID index
);
Description
This function clears a PMP output underflow error.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the BufferUnderFlow feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsBufferUnderFlow in your application to to
automatically determine whether this feature is available.
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Example
if(PLIB_PMP_OutputUnderflowHasOccurred( PMP_ID_0 ))
{
PLIB_PMP_OutputUnderflowClear( PMP_ID_0 );
}
5.6.16.6.6 Enhanced Error/Status Control Functions
5.6.16.6.6.1 PLIB_PMP_TransactionErrorClear Function
C
void PLIB_PMP_TransactionErrorClear(
PMP_MODULE_ID index
);
Description
This function clears the transaction error flag.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the TransactionError feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsTransactionError in your application to to
automatically determine whether this feature is available.
Example
if(PLIB_PMP_TransactionErrorHasOccurred ( PMP_ID_0 ) )
PLIB_PMP_TransactionErrorClear ( PMP_ID_0 );
5.6.16.6.6.2 PLIB_PMP_TransactionErrorHasOccurred Function
C
bool PLIB_PMP_TransactionErrorHasOccurred(
PMP_MODULE_ID index
);
Description
This function returns the status of a transaction error if an illegal transaction was requested.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
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Returns
• true - If illegal transaction was requested
• false - Transaction completed successfully
Remarks
This function implements an operation of the TransactionError feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsTransactionError in your application to to
automatically determine whether this feature is available.
Example
status = PLIB_PMP_TransactionErrorHasOccurred ( PMP_ID_0 );
5.6.16.6.6.3 PLIB_PMP_TransactionHasTimedOut Function
C
bool PLIB_PMP_TransactionHasTimedOut(
PMP_MODULE_ID index
);
Description
This function returns the time-out status of the PMP transaction.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
• true - If the transaction timed out
• false - If the transaction completed successfully
Remarks
This function implements an operation of the TransactionTimeOut feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsTransactionTimeOut in your
application to to automatically determine whether this feature is available.
Example
status = PLIB_PMP_TransactionHasTimedOut ( PMP_ID_0 );
5.6.16.6.6.4 PLIB_PMP_TransactionTimeoutClear Function
C
void PLIB_PMP_TransactionTimeoutClear(
PMP_MODULE_ID index
);
Description
This function clears the time-out flag.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the TransactionTimeOut feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsTransactionTimeOut in your
application to to automatically determine whether this feature is available.
Example
if(PLIB_PMP_TransactionHasTimedOut ( PMP_ID_0 ))
PLIB_PMP_TransactionTimeoutClear ( PMP_ID_0 );
5.6.16.6.7 Data Read and Write Functions
5.6.16.6.7.1 PLIB_PMP_InputBuffersAreFull Function
C
bool PLIB_PMP_InputBuffersAreFull(
PMP_MODULE_ID index
);
Description
This function gets the state of the input buffers.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
• true - If all input buffers are full
• false - If all input buffers are not full
Remarks
This function implements an operation of the InputBufferFull feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsInputBufferFull in your application to to
automatically determine whether this feature is available.
Example
uint8_t value;
if(PLIB_PMP_InputBuffersAreFull( PMP_ID_0 ))
{
value = PLIB_PMP_InputBufferXByteReceive( PMP_ID_0, 1 );
}
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5.6.16.6.7.2 PLIB_PMP_InputBufferXByteReceive Function
C
uint8_t PLIB_PMP_InputBufferXByteReceive(
PMP_MODULE_ID index,
uint8_t buffer
);
Description
The data to be received in Byte mode from the specified PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
buffer One of the possible buffers (valid values are 0 to 3)
Returns
data - Data to be received
Remarks
This function implements an operation of the BufferRead feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_PMP_ExistsBufferRead in your application to to
automatically determine whether this feature is available.
Example
uint8_t mydata;
if(!PLIB_PMP_PortIsBusy( PMP_ID_0 ))
{
// get data from buffer-1
mydata = PLIB_PMP_InputBufferXByteReceive( PMP_ID_0, 1 );
}
5.6.16.6.7.3 PLIB_PMP_InputBufferXIsFull Function
C
bool PLIB_PMP_InputBufferXIsFull(
PMP_MODULE_ID index,
uint8_t buffer
);
Description
This function gets the state of the identified input buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
buffer The input buffer number (valid values are 0 to 3)
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Returns
• true - If all input buffers are full
• false - If all input buffers are not full
Remarks
This function implements an operation of the InputBufferXStatus feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsInputBufferXStatus in your application to
to automatically determine whether this feature is available.
Example
uint8_t value;
// Check the status of buffer-2
if(PLIB_PMP_InputBufferXIsFull( PMP_ID_0, 2 ))
{
// get data from buffer 2
value = PLIB_PMP_InputBufferXByteReceive( PMP_ID_0, 2 );
}
5.6.16.6.7.4 PLIB_PMP_IsDataReceived Function
C
bool PLIB_PMP_IsDataReceived(
PMP_MODULE_ID index,
uint8_t buffer
);
Description
This function checks and returns if the data has been received in the specified buffer in Slave mode.
Preconditions
The PMP module should be configured for Slave mode operation.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
buffer One of the possible input buffers (valid values are 0 to 3)
Returns
• true - Data has been received in the specified buffer
• false - Data has not been received in the specified buffer
Remarks
This function implements an operation of the InputBufferXStatus feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsInputBufferXStatus in your application to
to automatically determine whether this feature is available.
Example
int8_t data;
// Check if data is received on buffer-2
if(PLIB_PMP_IsDataReceived( PMP_ID_0, 2 ))
{
// get data from buffer-2
data = PLIB_PMP_InputBufferXByteReceive( PMP_ID_0, 2 );
}
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5.6.16.6.7.5 PLIB_PMP_IsDataTransmitted Function
C
bool PLIB_PMP_IsDataTransmitted(
PMP_MODULE_ID index,
uint8_t buffer
);
Description
Checks and returns if data has been transmitted from the specified buffer.
Preconditions
The PMP module should be configured for Slave mode operation.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
buffer One of the possible output buffers (valid range is 0 to 3)
Returns
• true - If data has been transmitted from the specified buffer
• false - If data has not been transmitted from the specified buffer
Remarks
This function implements an operation of the OutputBufferXStatus feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsOutputBufferXStatus in your
application to to automatically determine whether this feature is available.
Example
uint8_t data;
if(PLIB_PMP_IsDataTransmitted( PMP_ID_0, 2 ))
{
PLIB_PMP_OutputBufferXByteSend( PMP_ID_0, 2, data );
}
5.6.16.6.7.6 PLIB_PMP_MasterReceive Function
C
uint16_t PLIB_PMP_MasterReceive(
PMP_MODULE_ID index
);
Description
This function receives the data. The dataflow is from slave to master.
Preconditions
The PMP module is configured as master.
Parameters
Parameters Description
index Identifier for the device instance to be addressed.
Returns
uint16_t - Data received
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Remarks
This function to be used only when the PMP is acting as master. This function implements an operation of the MasterRXTX
feature. This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability
or use PLIB_PMP_ExistsMasterRXTX in your application to to automatically determine whether this feature is available.
Example
uint16_t data;
if(!PLIB_PMP_PortIsBusy( PMP_ID_0 ))
{
data = PLIB_PMP_MasterReceive( PMP_ID_0 );
}
5.6.16.6.7.7 PLIB_PMP_MasterSend Function
C
void PLIB_PMP_MasterSend(
PMP_MODULE_ID index,
uint16_t data
);
Description
This function sends the specified data. The data flow is from master to slave.
Preconditions
The PMP module is configured for Master Mode.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
data Data to be transmitted
Returns
None.
Remarks
This function to be used only when the PMP is acting as master. This function implements an operation of the MasterRXTX
feature. This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability
or use PLIB_PMP_ExistsMasterRXTX in your application to to automatically determine whether this feature is available.
Example
uint16_t data = 'a';
if(!PLIB_PMP_PortIsBusy( PMP_ID_0 ))
{
PLIB_PMP_MasterSend( PMP_ID_0, data );
}
5.6.16.6.7.8 PLIB_PMP_OutputBuffersAreEmpty Function
C
bool PLIB_PMP_OutputBuffersAreEmpty(
PMP_MODULE_ID index
);
Description
This function gets the state of the output buffers.
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
• true - If all output buffers are empty
-false - If all output buffers are not empty
Remarks
This function implements an operation of the OutPutBufferEmpty feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsOutPutBufferEmpty in your
application to to automatically determine whether this feature is available.
Example
uint8_t value=0xEF;
if(PLIB_PMP_OutputBuffersAreEmpty( PMP_ID_0 ))
{
PLIB_PMP_OutputBufferXByteSend( PMP_ID_0, 1, value);
}
5.6.16.6.7.9 PLIB_PMP_OutputBufferXByteSend Function
C
void PLIB_PMP_OutputBufferXByteSend(
PMP_MODULE_ID index,
uint8_t buffer,
uint8_t data
);
Description
The data is transmitted in Byte mode for the specified PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
buffer One of the possible output buffers (valid range is 0 to 3)
data Data to be transmitted
Returns
None.
Remarks
This function implements an operation of the BufferWrite feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_PMP_ExistsBufferWrite in your application to to
automatically determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Example
uint8_t data = 'a';
if(!PLIB_PMP_PortIsBusy( PMP_ID_0 ))
{
PLIB_PMP_OutputBufferXByteSend( PMP_ID_0, 1, data );
}
5.6.16.6.7.10 PLIB_PMP_OutputBufferXIsEmpty Function
C
bool PLIB_PMP_OutputBufferXIsEmpty(
PMP_MODULE_ID index,
uint8_t buffer
);
Description
This function gets the state of the input buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
buffer Output buffer number (valid range is 0 to 3)
Returns
• true - If the identified output buffer is empty
• false - If the identified output buffer is not empty
Remarks
This function implements an operation of the OutputBufferXStatus feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsOutputBufferXStatus in your
application to to automatically determine whether this feature is available.
Example
uint8_t value = 0xEF;
if(PLIB_PMP_OutputBufferXIsEmpty( PMP_ID_0, 1 ) )
{
PLIB_PMP_OutputBufferXByteSend( PMP_ID_0,1, value);
}
5.6.16.6.7.11 PLIB_PMP_SlaveReceive Function
C
uint16_t PLIB_PMP_SlaveReceive(
PMP_MODULE_ID index
);
Description
This function receives the data. The dataflow is from master to slave.
Preconditions
The PMP module is configured as slave.
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be addressed.
Returns
uint16_t - Data received
Remarks
This function to be used only when the PMP is acting as slave. This function implements an operation of the SlaveRX feature.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsSlaveRX in your application to to automatically determine whether this feature is available.
Example
uint16_t data;
if(!PLIB_PMP_PortIsBusy( PMP_ID_0 ))
{
data = PLIB_PMP_SlaveReceive( PMP_ID_0 );
}
5.6.16.6.7.12 PLIB_PMP_SlaveSend Function
C
void PLIB_PMP_SlaveSend(
PMP_MODULE_ID index,
uint16_t data
);
Description
This function sends the specified data. The data flow is from slave to master.
Preconditions
The PMP module is configured for Slave Mode.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
data Data to be transmitted
Returns
None.
Remarks
This function to be used only when the PMP is acting as slave. This function implements an operation of the SlaveTX feature.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsSlaveTX in your application to to automatically determine whether this feature is available.
Example
uint16_t data = 'a';
if(!PLIB_PMP_PortIsBusy( PMP_ID_0 ))
{
PLIB_PMP_SlaveSend( PMP_ID_0, data );
}
5.6.16.6.8 Wait States Initialization Functions
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5.6.16.6.8.1 PLIB_PMP_WaitStatesDataHoldSelect Function
C
void PLIB_PMP_WaitStatesDataHoldSelect(
PMP_MODULE_ID index,
PMP_DATA_HOLD_STATES dataHoldState
);
Description
This function configures the number of peripheral bus clock cycles needed for wait states. Refer to the enumeration
PMP_DATA_HOLD_STATES for the possible settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
dataHoldState One of the possible values from PMP_DATA_HOLD_STATES
Returns
None.
Remarks
This function implements an operation of the DataHoldWaitStates feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsDataHoldWaitStates in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_WaitStatesDataHoldSelect( PMP_ID_0, PMP_DATA_HOLD_2 );
5.6.16.6.8.2 PLIB_PMP_WaitStatesDataSetUpSelect Function
C
void PLIB_PMP_WaitStatesDataSetUpSelect(
PMP_MODULE_ID index,
PMP_DATA_WAIT_STATES dataWaitState
);
Description
This function configures the number of peripheral bus clock cycles needed for wait states. Refer to the enumeration
PMP_DATA_WAIT_STATES for the possible settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
dataWaitState One of the possible values from PMP_DATA_WAIT_STATES
Returns
None.
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Remarks
This function implements an operation of the DataSetUpWaitStates feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsDataSetUpWaitStates in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_WaitStatesDataSetUpSelect( PMP_ID_0, PMP_DATA_WAIT_TWO );
5.6.16.6.8.3 PLIB_PMP_WaitStatesStrobeSelect Function
C
void PLIB_PMP_WaitStatesStrobeSelect(
PMP_MODULE_ID index,
PMP_STROBE_WAIT_STATES strobeWaitState
);
Description
This function configures the number of peripheral bus clock cycles needed for wait states. Refer to the enumeration
PMP_STROBE_WAIT_STATES for the possible settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
strobeWaitState One of the possible values from PMP_STROBE_WAIT_STATES
Returns
None.
Remarks
This function implements an operation of the DataStrobeWaitStates feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsDataStrobeWaitStates in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_WaitStatesStrobeSelect( PMP_ID_0, PMP_STROBE_WAIT_2 );
5.6.16.6.9 Enhanced Wait States Initialization Functions
5.6.16.6.9.1 PLIB_PMP_ChipXWaitStatesAlternateMasterSelect Function
C
void PLIB_PMP_ChipXWaitStatesAlternateMasterSelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect,
PMP_ALTERNATE_MASTER_WAIT_STATES waitStates
);
Description
Selects the wait states of the alternate master for Chip Select-X.
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
waitStates Identifier for wait states
chipSelect One of the possible values from PMP_CHIP_SELECT
Returns
None.
Remarks
This function implements an operation of the ChipXAltMasterWaitStates feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsChipXAltMasterWaitStates in your application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ChipXWaitStatesAlternateMasterSelect ( PMP_ID_0,
PMP_CHIP_SELECT_ONE,
PMP_ALTERNATE_MASTER_WAIT_THREE );
5.6.16.6.9.2 PLIB_PMP_ChipXWaitStatesDataHoldSelect Function
C
void PLIB_PMP_ChipXWaitStatesDataHoldSelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipselect,
PMP_DATA_HOLD_STATES dataHoldState
);
Description
This function configures the number of peripheral bus clock cycles needed for wait states. Refer to the enumeration
PMP_DATA_HOLD_STATES for the possible settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipselect One of the possible values from PMP_CHIP_SELECT
dataHoldState One of the possible values from PMP_DATA_HOLD_STATES
Returns
None.
Remarks
This function implements an operation of the ChipXDataHoldWaitStates feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXDataHoldWaitStates in
your application to to automatically determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Example
PLIB_PMP_ChipXWaitStatesDataHoldSelect( PMP_ID_0,
PMP_CHIP_SELECT_ONE,
PMP_DATA_HOLD_2 );
5.6.16.6.9.3 PLIB_PMP_ChipXWaitStatesDataSetupSelect Function
C
void PLIB_PMP_ChipXWaitStatesDataSetupSelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipselect,
PMP_DATA_WAIT_STATES dataWaitState
);
Description
This function configures the number of peripheral bus clock cycles needed for wait states for the specified device. Refer to the
enumeration PMP_DATA_WAIT_STATES for the possible settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipselect One of the possible values from PMP_CHIP_SELECT
dataWaitState One of the possible values from PMP_DATA_WAIT_STATES
Returns
None.
Remarks
This function implements an operation of the ChipXDataSetupWaitStates feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsChipXDataSetupWaitStates in your application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ChipXWaitStatesDataSetupSelect( PMP_ID_0,
PMP_CHIP_SELECT_ONE,
PMP_DATA_WAIT_ONE );
5.6.16.6.9.4 PLIB_PMP_ChipXWaitStatesStrobeSelect Function
C
void PLIB_PMP_ChipXWaitStatesStrobeSelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipselect,
PMP_STROBE_WAIT_STATES strobeWaitState
);
Description
This function configures the number of peripheral bus clock cycles needed for wait states for the specified device. Refer to the
enumeration PMP_STROBE_WAIT_STATES for the possible settings.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipselect One of the possible values from PMP_CHIP_SELECT
strobeWaitState One of the possible values from PMP_STROBE_WAIT_STATES
Returns
None.
Remarks
This function implements an operation of the ChipXStrobeWaitStates feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXStrobeWaitStates in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ChipXWaitStatesStrobeSelect( PMP_ID_0,
PMP_CHIP_SELECT_ONE,
PMP_STROBE_WAIT_3 );
5.6.16.6.9.5 PLIB_PMP_WaitStatesAddressHoldStrobeSelect Function
C
void PLIB_PMP_WaitStatesAddressHoldStrobeSelect(
PMP_MODULE_ID index,
PMP_ADDRESS_HOLD_LATCH_WAIT_STATES waitState
);
Description
This function configures the number of peripheral bus clock cycles needed for wait states. Refer to the enumeration
PMP_ADDRESS_HOLD_LATCH_WAIT_STATES for the possible settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
waitState One of the possible values from PMP_ADDRESS_HOLD_LATCH_WAIT_STATES
Returns
None.
Remarks
This function implements an operation of the WaitStatesAddrHoldStrobe feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsWaitStatesAddrHoldStrobe in your application to to automatically determine whether this feature is available.
Example
PLIB_PMP_WaitStatesAddressHoldStrobeSelect( PMP_ID_0,
PMP_ADDRESS_HOLD_ONE_AND_ONE_QUARTER );
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5.6.16.6.9.6 PLIB_PMP_WaitStatesAddressLatchStrobeSelect Function
C
void PLIB_PMP_WaitStatesAddressLatchStrobeSelect(
PMP_MODULE_ID index,
PMP_ADDRESS_LATCH_WAIT_STATES waitState
);
Description
This function configures the number of peripheral bus clock cycles needed for wait states. Refer to the enumeration
PMP_ADDRESS_LATCH_WAIT_STATES for the possible settings.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
waitState One of the possible values from PMP_ADDRESS_LATCH_WAIT_STATES
Returns
None.
Remarks
This function implements an operation of the WaitStatesAddrLatchStrobe feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsWaitStatesAddrLatchStrobe in your application to to automatically determine whether this feature is available.
Example
PLIB_PMP_WaitStatesAddressLatchStrobeSelect( PMP_ID_0,
PMP_ADDRESS_WAIT_ONE_AND_HALF );
5.6.16.6.10 Address Handling Functions
5.6.16.6.10.1 PLIB_PMP_AddressGet Function
C
uint32_t PLIB_PMP_AddressGet(
PMP_MODULE_ID index
);
Description
This function gets the current address of the PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
address - Device address to be set
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Remarks
This function implements an operation of the AddressControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsAddressControl in your application to to
automatically determine whether this feature is available.
Example
uint32_t address;
address = PLIB_PMP_AddressGet( PMP_ID_0 );
5.6.16.6.10.2 PLIB_PMP_AddressLinesA0A1Get Function
C
uint8_t PLIB_PMP_AddressLinesA0A1Get(
PMP_MODULE_ID index
);
Description
This function gets the value of the address lines PMA0 and PMA1. This function is used in the addressable parallel slave port
mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
uint8_t - The two-bit address
Remarks
This function implements an operation of the AddressControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsAddressControl in your application to to
automatically determine whether this feature is available.
Example
uint8_t bufferAddress;
bufferAddress = PLIB_PMP_AddressLinesA0A1Get( PMP_ID_0 );
5.6.16.6.10.3 PLIB_PMP_AddressLinesA0A1Set Function
C
void PLIB_PMP_AddressLinesA0A1Set(
PMP_MODULE_ID index,
uint8_t address
);
Description
This function sets the address lines PMA0 and PMA1 with the value specified. This function is used in the addressable parallel
slave port mode.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be addressed
address The two-bit address
Returns
None.
Remarks
This function implements an operation of the AddressControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsAddressControl in your application to to
automatically determine whether this feature is available.
Example
uint8_t bufferAddress = 0x2;
PLIB_PMP_AddressLinesA0A1Set( PMP_ID_0, bufferAddress );
5.6.16.6.10.4 PLIB_PMP_AddressSet Function
C
void PLIB_PMP_AddressSet(
PMP_MODULE_ID index,
uint32_t address
);
Description
This function sets the current address of the PMP module to the specified value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
address Device address to be set
Returns
None.
Remarks
This function implements an operation of the AddressControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsAddressControl in your application to to
automatically determine whether this feature is available.
Example
uint8_t no_of_addressLines = 8;
PLIB_PMP_AddressSet( PMP_ID_0, 0xff );
5.6.16.6.11 Enhanced Address Handling Functions
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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5.6.16.6.11.1 PLIB_PMP_ChipXBaseAddressSet Function
C
void PLIB_PMP_ChipXBaseAddressSet(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect,
uint16_t baseAddress
);
Description
This function sets the base address of the specified device.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
baseAddress Base address of the chip
chipSelect One of the possible values from PMP_CHIP_SELECT
Returns
None.
Remarks
This function implements an operation of the ChipXBaseAddress feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXBaseAddress in your
application to to automatically determine whether this feature is available.
Example
uint16_t baseAddress = 0x00FF;
PLIB_PMP_ChipXBaseAddressSet( PMP_ID_0, PMP_CHIP_SELECT_ONE, baseAddress );
5.6.16.6.11.2 PLIB_PMP_ReservedAddressSpaceBitsSet Function
C
void PLIB_PMP_ReservedAddressSpaceBitsSet(
PMP_MODULE_ID index,
uint8_t reservedAddress
);
Description
This function sets the address bits of the reserved address space of the EPMP. The reserved address space determines the end
address of the Chip Select-2 (if used). If the reserved address space is set to 0, the last EDS address for the Chip Select-2 will
be 0xFFFFFF. For the address range to be accessible for the Chip Select-2 set the reserved address space to a value higher
than Chip Select-2 base address.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
reservedAddress The reserved address bits
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Returns
None.
Remarks
This function implements an operation of the ReservedAddrSpace feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsReservedAddrSpace in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ReservedAddressSpaceBitsSet ( PMP_ID_0, 0xDF );
5.6.16.6.12 Port Configuration Functions
5.6.16.6.12.1 PLIB_PMP_AddressPortDisable Function
C
void PLIB_PMP_AddressPortDisable(
PMP_MODULE_ID index,
PMP_ADDRESS_PORT portfunctions
);
Description
This function disables the port lines specified as PMP address lines. They function as normal I/O lines.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
portfunctions One of the possible values from PMP_ADDRESS_PORT
Returns
None.
Remarks
This function implements an operation of the AddressPortPinControl feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsAddressPortPinControl in your
application to to automatically determine whether this feature is available.
Example
//Example-1
PMP_ADDRESS_PORT portfunctions = PMP_PMA2_TO_PMA13_PORTS;
PLIB_PMP_AddressPortDisable( PMP_ID_0, PMP_PMA2_TO_PMA13_PORTS );
//Example-2
PLIB_PMP_AddressPortDisable( PMP_ID_0,
( PMP_PMA14_PORT | PMP_PMA15_PORT ) );
5.6.16.6.12.2 PLIB_PMP_AddressPortEnable Function
C
void PLIB_PMP_AddressPortEnable(
PMP_MODULE_ID index,
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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PMP_ADDRESS_PORT portfunctions
);
Description
This function enables the port lines specified as PMP address lines.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
portfunctions One of the possible values from PMP_ADDRESS_PORT
Returns
None.
Remarks
This function implements an operation of the AddressPortPinControl feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsAddressPortPinControl in your
application to to automatically determine whether this feature is available.
Example
//Example-1
PMP_ADDRESS_PORT portfunctions = PMP_PMA2_TO_PMA13_PORTS;
PLIB_PMP_AddressPortEnable( PMP_ID_0, PMP_PMA2_TO_PMA13_PORTS );
//Example-2
PLIB_PMP_AddressPortEnable( PMP_ID_0,
( PMP_PMA14_PORT | PMP_PMA15_PORT ) );
5.6.16.6.12.3 PLIB_PMP_ByteEnablePortDisable Function
C
void PLIB_PMP_ByteEnablePortDisable(
PMP_MODULE_ID index,
PMP_PMBE_PORT pmbeInstance
);
Description
This function disables the byte enable port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
pmbeInstance One of the possible values from PMP_PMBE_PORT
Returns
None.
Remarks
This function implements an operation of the ExistsByteEnablePortControl feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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PLIB_PMP_ExistsExistsByteEnablePortControl in your application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ByteEnablePortDisable( PMP_ID_0, PMBE_0 );
5.6.16.6.12.4 PLIB_PMP_ByteEnablePortEnable Function
C
void PLIB_PMP_ByteEnablePortEnable(
PMP_MODULE_ID index,
PMP_PMBE_PORT pmbeInstance
);
Description
This function enables the byte enable port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
pmbeInstance One of the possible values from PMP_PMBE_PORT
Returns
None.
Remarks
This function implements an operation of the ExistsByteEnablePortControl feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsExistsByteEnablePortControl in your application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ByteEnablePortEnable( PMP_ID_0, PMBE_0 );
5.6.16.6.12.5 PLIB_PMP_ReadWriteStrobePortDisable Function
C
void PLIB_PMP_ReadWriteStrobePortDisable(
PMP_MODULE_ID index
);
Description
This function disables the read strobe port of the PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
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Remarks
This function implements an operation of the ReadWriteStrobePortControl feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsReadWriteStrobePortControl in your application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ReadWriteStrobePortDisable( PMP_ID_0 );
5.6.16.6.12.6 PLIB_PMP_ReadWriteStrobePortEnable Function
C
void PLIB_PMP_ReadWriteStrobePortEnable(
PMP_MODULE_ID index
);
Description
This function enables the read strobe port of the PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the ReadWriteStrobePortControl feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PMP_ExistsReadWriteStrobePortControl in your application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ReadWriteStrobePortEnable( PMP_ID_0 );
5.6.16.6.12.7 PLIB_PMP_WriteEnableStrobePortDisable Function
C
void PLIB_PMP_WriteEnableStrobePortDisable(
PMP_MODULE_ID index
);
Description
This function disables the write strobe port of the PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
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Returns
None.
Remarks
This function implements an operation of the WriteEnablePortControl feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsWriteEnablePortControl in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_WriteEnableStrobePortDisable( PMP_ID_0 );
5.6.16.6.12.8 PLIB_PMP_WriteEnableStrobePortEnable Function
C
void PLIB_PMP_WriteEnableStrobePortEnable(
PMP_MODULE_ID index
);
Description
This function enables the write strobe port of the PMP module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
Returns
None.
Remarks
This function implements an operation of the WriteEnablePortControl feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsWriteEnablePortControl in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_WriteEnableStrobePortEnable( PMP_ID_0 );
5.6.16.6.13 Enhanced Port Configuration Functions
5.6.16.6.13.1 PLIB_PMP_ChipSelectXPortDisable Function
C
void PLIB_PMP_ChipSelectXPortDisable(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect
);
Description
This function disables the specified Chip Select's port.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect One of the possible values from PMP_CHIP_SELECT
Returns
None.
Remarks
This function implements an operation of the CSXPortControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsCSXPortControl in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_ChipSelectXPortDisable ( PMP_ID_0, PMP_CHIP_SELECT_ONE );
5.6.16.6.13.2 PLIB_PMP_ChipSelectXPortEnable Function
C
void PLIB_PMP_ChipSelectXPortEnable(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect
);
Description
This function enables the specified Chip Select's port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect One of the possible values from PMP_CHIP_SELECT
Returns
None.
Remarks
This function implements an operation of the CSXPortControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsCSXPortControl in your application to to
automatically determine whether this feature is available.
Example
PLIB_PMP_ChipSelectXPortEnable ( PMP_ID_0, PMP_CHIP_SELECT_ONE );
5.6.16.6.14 Polarity Configuration Functions
5.6.16.6.14.1 PLIB_PMP_AddressLatchPolaritySelect Function
C
void PLIB_PMP_AddressLatchPolaritySelect(
PMP_MODULE_ID index,
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PMP_POLARITY_LEVEL polarity
);
Description
This function sets the address latch polarity to the level specified.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
polarity Possible polarity levels
Returns
None.
Remarks
This function implements an operation of the AddressLatchPolarity feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsAddressLatchPolarity in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_AddressLatchPolaritySelect( PMP_ID_0, PMP_POLARITY_ACTIVE_HIGH );
5.6.16.6.14.2 PLIB_PMP_ByteEnablePolaritySelect Function
C
void PLIB_PMP_ByteEnablePolaritySelect(
PMP_MODULE_ID index,
PMP_POLARITY_LEVEL polarity
);
Description
This function sets the byte enable polarity to the level specified.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
polarity Possible polarity levels
Returns
None.
Remarks
This function implements an operation of the ByteEnablePolarity feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsByteEnablePolarity in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ByteEnablePolaritySelect ( PMP_ID_0, PMP_POLARITY_ACTIVE_HIGH );
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5.6.16.6.14.3 PLIB_PMP_ChipSelectXPolaritySelect Function
C
void PLIB_PMP_ChipSelectXPolaritySelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect,
PMP_POLARITY_LEVEL polarity
);
Description
This function sets the specified Chip Select polarity to the level specified.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect Identifier for Chip Select
polarity Possible polarity levels
Returns
None.
Remarks
This function implements an operation of the ChipXPolarity feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXPolarity in your application to to
automatically determine whether this feature is available.
Example
PMP_CHIP_SELECT chipSelect = PMP_CHIP_SELECT_ONE;
PLIB_PMP_ChipSelectXPolaritySelect( PMP_ID_0,
chipSelect,
PMP_POLARITY_ACTIVE_HIGH );
5.6.16.6.14.4 PLIB_PMP_ReadWriteStrobePolaritySelect Function
C
void PLIB_PMP_ReadWriteStrobePolaritySelect(
PMP_MODULE_ID index,
PMP_POLARITY_LEVEL polarity
);
Description
This function sets polarity of the read strobe to the level specified.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
polarity Possible polarity levels
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Returns
None.
Remarks
This function implements an operation of the ReadWritePolarity feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsReadWritePolarity in your application to
to automatically determine whether this feature is available.
Example
PLIB_PMP_ReadWriteStrobePolaritySelect( PMP_ID_0, PMP_POLARITY_ACTIVE_HIGH );
5.6.16.6.14.5 PLIB_PMP_WriteEnableStrobePolaritySelect Function
C
void PLIB_PMP_WriteEnableStrobePolaritySelect(
PMP_MODULE_ID index,
PMP_POLARITY_LEVEL polarity
);
Description
This function sets the polarity of the write enable strobe to the level specified.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
polarity Possible polarity levels
Returns
None.
Remarks
This function implements an operation of the WriteEnablePolarity feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsWriteEnablePolarity in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_WriteEnableStrobePolaritySelect( PMP_ID_0, PMP_POLARITY_ACTIVE_HIGH );
5.6.16.6.15 Enhanced Polarity Configuration Functions
5.6.16.6.15.1 PLIB_PMP_ChipSelectXAckPolaritySelect Function
C
void PLIB_PMP_ChipSelectXAckPolaritySelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect,
PMP_POLARITY_LEVEL polarity
);
Description
This function sets the Chip Select acknowledge polarity to the level specified.
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect Identifier for the Chip Select
polarity Possible polarity levels
Returns
None.
Remarks
This function implements an operation of the ChipXACKPolarity feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXACKPolarity in your application to
to automatically determine whether this feature is available.
Example
PMP_CHIP_SELECT chipSelect = PMP_CHIP_SELECT_ONE;
PLIB_PMP_ChipSelectXAckPolaritySelect( PMP_ID_0,
chipSelect,
PMP_POLARITY_ACTIVE_LOW );
5.6.16.6.15.2 PLIB_PMP_ChipSelectXByteEnablePortPolaritySelect Function
C
void PLIB_PMP_ChipSelectXByteEnablePortPolaritySelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect,
PMP_POLARITY_LEVEL polarity
);
Description
This function sets the nibble/byte enable polarity to the level specified.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect One of the possible values from PMP_CHIP_SELECT
polarity Possible polarity levels
Returns
None.
Remarks
This function implements an operation of the ChipXByteEnablePolarity feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXByteEnablePolarity in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ChipSelectXByteEnablePortPolaritySelect ( PMP_ID_0,
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PMP_CHIP_SELECT_ONE,
PMP_POLARITY_ACTIVE_LOW );
5.6.16.6.15.3 PLIB_PMP_ChipSelectXReadWriteStrobePolaritySelect Function
C
void PLIB_PMP_ChipSelectXReadWriteStrobePolaritySelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect,
PMP_POLARITY_LEVEL polarity
);
Description
This function sets the read/write strobe polarity to the level specified.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect One of the possible values from PMP_CHIP_SELECT
polarity Possible polarity levels
Returns
None.
Remarks
This function implements an operation of the ChipXReadWritePolarity feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXReadWritePolarity in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ChipSelectXReadWriteStrobePolaritySelect ( PMP_ID_0,
PMP_CHIP_SELECT_ONE,
PMP_POLARITY_ACTIVE_LOW );
5.6.16.6.15.4 PLIB_PMP_ChipSelectXWriteEnableStrobePolaritySelect Function
C
void PLIB_PMP_ChipSelectXWriteEnableStrobePolaritySelect(
PMP_MODULE_ID index,
PMP_CHIP_SELECT chipSelect,
PMP_POLARITY_LEVEL polarity
);
Description
This function sets the write/enable strobe polarity to the level specified.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be addressed
chipSelect One of the possible values from PMP_CHIP_SELECT
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polarity Possible polarity levels
Returns
None.
Remarks
This function implements an operation of the ChipXWriteEnablePolarity feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_PMP_ExistsChipXWriteEnablePolarity in your
application to to automatically determine whether this feature is available.
Example
PLIB_PMP_ChipSelectXWriteEnableStrobePolaritySelect ( PMP_ID_0,
PMP_CHIP_SELECT_ONE,
PMP_POLARITY_ACTIVE_LOW );
5.6.16.6.16 Data Types and Constants
5.6.16.6.16.1 PMP_ACK_MODE Enumeration
C
typedef enum {
PMP_USE_ACK_WITH_TIMEOUT,
PMP_USE_ACK,
PMP_ACK_DISABLED
} PMP_ACK_MODE;
Description
PMP Acknowledge Modes
This data type defines the different configurations by which the PMP can be enabled.
Members
Members Description
PMP_USE_ACK_WITH_TIMEOUT Acknowledge used with a timeout
PMP_USE_ACK Acknowledge is used
PMP_ACK_DISABLED Acknowledge is not used
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.2 PMP_ADDRESS_HOLD_LATCH_WAIT_STATES Enumeration
C
typedef enum {
PMP_ADDRESS_HOLD_ONE_AND_ONE_QUARTER,
PMP_ADDRESS_HOLD_ONE_QUARTER
} PMP_ADDRESS_HOLD_LATCH_WAIT_STATES;
Description
PMP Address Latch Strobe Wait States
This data type defines the different configurations by which the PMP holds after address latch strobe wait states can be
configured. Refer to the specific device data sheet for the exact clock cycle timing.
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Members
Members Description
PMP_ADDRESS_HOLD_ONE_AND_ONE_QUARTER Data Wait of 1 1/4 Peripheral Bus Clock Cycles
PMP_ADDRESS_HOLD_ONE_QUARTER Data Wait of 1/4 Peripheral Bus Clock Cycles
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.3 PMP_ADDRESS_LATCH Enumeration
C
typedef enum {
PMP_ADDRESS_LATCH_UPPER,
PMP_ADDRESS_LATCH_HIGH,
PMP_ADDRESS_LATCH_LOW
} PMP_ADDRESS_LATCH;
Description
PMP Address Latch
This data type defines the different configurations by which the PMP address latch strobes can be configured.
Members
Members Description
PMP_ADDRESS_LATCH_UPPER Address latch upper
PMP_ADDRESS_LATCH_HIGH Address latch high
PMP_ADDRESS_LATCH_LOW Address latch low
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.4 PMP_ADDRESS_LATCH_WAIT_STATES Enumeration
C
typedef enum {
PMP_ADDRESS_WAIT_THREE_AND_HALF,
PMP_ADDRESS_WAIT_TWO_AND_HALF,
PMP_ADDRESS_WAIT_ONE_AND_HALF,
PMP_ADDRESS_WAIT_HALF
} PMP_ADDRESS_LATCH_WAIT_STATES;
Description
PMP Address Latch Strobe Wait States
This data type defines the different configurations by which the PMP address latch strobe wait states can be configured. Refer to
the specific device data sheet for the exact clock cycle timing.
Members
Members Description
PMP_ADDRESS_WAIT_THREE_AND_HALF Data Wait of 3 1/2 Peripheral Bus Clock Cycles
PMP_ADDRESS_WAIT_TWO_AND_HALF Data Wait of 2 1/2 Peripheral Bus Clock Cycles
PMP_ADDRESS_WAIT_ONE_AND_HALF Data Wait of 1 1/2 Peripheral Bus Clock Cycles
PMP_ADDRESS_WAIT_HALF Data Wait of 1/2 Peripheral Bus Clock Cycles
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Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.5 PMP_ADDRESS_PORT Enumeration
C
typedef enum {
PMP_PMA0_PORT,
PMP_PMA1_PORT,
PMP_PMA2_TO_PMA13_PORTS,
PMP_PMA2_PORT,
PMP_PMA3_PORT,
PMP_PMA4_PORT,
PMP_PMA5_PORT,
PMP_PMA6_PORT,
PMP_PMA7_PORT,
PMP_PMA8_PORT,
PMP_PMA9_PORT,
PMP_PMA10_PORT,
PMP_PMA11_PORT,
PMP_PMA12_PORT,
PMP_PMA13_PORT,
PMP_PMA14_PORT,
PMP_PMA15_PORT,
PMP_PMA16_TO_PMA22_PORTS
} PMP_ADDRESS_PORT;
Description
PMP Address Port Pins
This data type defines the different address that can be configured by the PMP module. The user application can make each pin
as a general purpose I/O or part of PMP functionality.
Members
Members Description
PMP_PMA0_PORT Address line 0 port (make as general purpose I/O or PMP address line)
PMP_PMA1_PORT Address line 1 port (make as general purpose I/O or PMP address line)
PMP_PMA2_TO_PMA13_PORTS Address line 2 to 13 ports (make as general purpose I/O or PMP address lines)
PMP_PMA2_PORT Address line 2 port (make as general purpose I/O or PMP address line)
PMP_PMA3_PORT Address line 3 port (make as general purpose I/O or PMP address line)
PMP_PMA4_PORT Address line 4 port (make as general purpose I/O or PMP address line)
PMP_PMA5_PORT Address line 5 port (make as general purpose I/O or PMP address line)
PMP_PMA6_PORT Address line 6 port (make as general purpose I/O or PMP address line)
PMP_PMA7_PORT Address line 7 port (make as general purpose I/O or PMP address line)
PMP_PMA8_PORT Address line 8 port (make as general purpose I/O or PMP address line)
PMP_PMA9_PORT Address line 9 port (make as general purpose I/O or PMP address line)
PMP_PMA10_PORT Address line 10 port (make as general purpose I/O or PMP address line)
PMP_PMA11_PORT Address line 11 port (make as general purpose I/O or PMP address line)
PMP_PMA12_PORT Address line 12 port (make as general purpose I/O or PMP address line)
PMP_PMA13_PORT Address line 13 port (make as general purpose I/O or PMP address line)
PMP_PMA14_PORT Address line 14 port (make as general purpose I/O or PMP address line)
PMP_PMA15_PORT Address line 15 port (make as general purpose I/O or PMP address line)
PMP_PMA16_TO_PMA22_PORTS Address line 16 to 22 ports (make as general purpose I/O or PMP address lines)
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Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h). These
enumerator values can be passed in a bitwise ORed fashion to select multiple ports at a time.
5.6.16.6.16.6 PMP_ALTERNATE_MASTER_WAIT_STATES Enumeration
C
typedef enum {
PMP_ALTERNATE_MASTER_WAIT_10,
PMP_ALTERNATE_MASTER_WAIT_9,
PMP_ALTERNATE_MASTER_WAIT_8,
PMP_ALTERNATE_MASTER_WAIT_7,
PMP_ALTERNATE_MASTER_WAIT_6,
PMP_ALTERNATE_MASTER_WAIT_5,
PMP_ALTERNATE_MASTER_WAIT_4,
PMP_ALTERNATE_MASTER_WAIT_3
} PMP_ALTERNATE_MASTER_WAIT_STATES;
Description
PMP Alternate Master Wait States
This data type defines the different configurations by which the PMP alternate master wait states can be configured.
Members
Members Description
PMP_ALTERNATE_MASTER_WAIT_10 Wait of 10 Alternate Master Cycles
PMP_ALTERNATE_MASTER_WAIT_9 Wait of 9 Alternate Master Cycles
PMP_ALTERNATE_MASTER_WAIT_8 Wait of 8 Alternate Master Cycles
PMP_ALTERNATE_MASTER_WAIT_7 Wait of 7 Alternate Master Cycles
PMP_ALTERNATE_MASTER_WAIT_6 Wait of 6 Alternate Master Cycles
PMP_ALTERNATE_MASTER_WAIT_5 Wait of 5 Alternate Master Cycles
PMP_ALTERNATE_MASTER_WAIT_4 Wait of 4 Alternate Master Cycles
PMP_ALTERNATE_MASTER_WAIT_3 Wait of 3 Alternate Master Cycles
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.7 PMP_CHIP_SELECT Enumeration
C
typedef enum {
PMP_CHIP_SELECT_ONE,
PMP_CHIP_SELECT_TWO
} PMP_CHIP_SELECT;
Description
PMP Chip Select
This data type defines the different Chip Select lines of the PMP module.
Members
Members Description
PMP_CHIP_SELECT_ONE chip selct One
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PMP_CHIP_SELECT_TWO chip selct Two
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.8 PMP_CHIPSELECT_FUNCTION Enumeration
C
typedef enum {
PMCS1_AS_CHIP_SELECT,
PMCS1_AS_ADDRESS_LINE,
PMCS1_PMCS2_AS_ADDRESS_LINES,
PMCS1_AS_ADDRESS_LINE_PMCS2_AS_CHIP_SELECT,
PMCS1_AND_PMCS2_AS_CHIP_SELECT
} PMP_CHIPSELECT_FUNCTION;
Description
PMP Chip Select pin functions
This data type defines different functions of Chip Select pins.
Members
Members Description
PMCS1_AS_CHIP_SELECT CS1 used as Chip Select
PMCS1_AS_ADDRESS_LINE CS1 used as address line
PMCS1_PMCS2_AS_ADDRESS_LINES CS1 and CS2 used as address lines
PMCS1_AS_ADDRESS_LINE_PMCS2_AS_CHIP_SELECT CS1 used as address line and CS2 as Chip Select
PMCS1_AND_PMCS2_AS_CHIP_SELECT Both CS1 and CS2 used as Chip Selects
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.9 PMP_DATA_HOLD_STATES Enumeration
C
typedef enum {
PMP_DATA_HOLD_FOUR,
PMP_DATA_HOLD_THREE,
PMP_DATA_HOLD_TWO,
PMP_DATA_HOLD_ONE
} PMP_DATA_HOLD_STATES;
Description
PMP Data Hold after strobe wait state
This data type defines the different data Hold after strobe wait states.
Members
Members Description
PMP_DATA_HOLD_FOUR Data Hold of 4 Peripheral Bus Clock Cycles
PMP_DATA_HOLD_THREE Data Hold of 3 Peripheral Bus Clock Cycles
PMP_DATA_HOLD_TWO Data Hold of 2 Peripheral Bus Clock Cycles
PMP_DATA_HOLD_ONE Data Hold of 1 Peripheral Bus Clock Cycles
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Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.10 PMP_DATA_LENGTH Enumeration
C
typedef enum {
PMP_DATA_8_BITS,
PMP_DATA_16_BITS,
PMP_DATA_32_BITS
} PMP_DATA_LENGTH;
Description
PMP data length
This data type defines the possible data lengths handled by the PMP module.
Members
Members Description
PMP_DATA_8_BITS 8-bit data length
PMP_DATA_16_BITS 16-bit data length
PMP_DATA_32_BITS 32-bit data length
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.11 PMP_DATA_SIZE Enumeration
C
typedef enum {
PMP_DATA_SIZE_SIXTEEN_BITS,
PMP_DATA_SIZE_EIGHT_BITS,
PMP_DATA_SIZE_FOUR_BITS
} PMP_DATA_SIZE;
Description
PMP DATA Size
This data type defines the different configurations for the data lengths handled by the PMP module.
Members
Members Description
PMP_DATA_SIZE_SIXTEEN_BITS Data length of 16-bits
PMP_DATA_SIZE_EIGHT_BITS Data length of 8-bits
PMP_DATA_SIZE_FOUR_BITS Data length of 4-bits
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.12 PMP_DATA_WAIT_STATES Enumeration
C
typedef enum {
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PMP_DATA_WAIT_FOUR,
PMP_DATA_WAIT_THREE,
PMP_DATA_WAIT_TWO,
PMP_DATA_WAIT_ONE
} PMP_DATA_WAIT_STATES;
Description
PMP Data setup to read/write/address phase wait state configuration
This data type defines the different wait state configurations for setup to read/write/address phase.
Members
Members Description
PMP_DATA_WAIT_FOUR Data Wait of 4 Peripheral Bus Clock Cycles
PMP_DATA_WAIT_THREE Data Wait of 3 Peripheral Bus Clock Cycles
PMP_DATA_WAIT_TWO Data Wait of 2 Peripheral Bus Clock Cycles
PMP_DATA_WAIT_ONE Data Wait of 1 Peripheral Bus Clock Cycles
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.13 PMP_INCREMENT_MODE Enumeration
C
typedef enum {
PMP_BUFFERS_AUTO_INCREMENT,
PMP_ADDRESS_AUTO_DECREMENT,
PMP_ADDRESS_AUTO_INCREMENT,
PMP_ADDRESS_INCREMENT_DECREMENT_DISABLE
} PMP_INCREMENT_MODE;
Description
PMP Increment Modes
This data type defines the different configurations by which the PMP address incrementing can be configured.
Members
Members Description
PMP_BUFFERS_AUTO_INCREMENT Read and write buffers auto-increment
PMP_ADDRESS_AUTO_DECREMENT Decrement PMP Address by one every read/write cycle
PMP_ADDRESS_AUTO_INCREMENT Increment PMP Address by one every read/write cycle
PMP_ADDRESS_INCREMENT_DECREMENT_DISABLE PMP Address does not change
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.14 PMP_INPUT_BUFFER_TYPE Enumeration
C
typedef enum {
PMP_INPUT_BUFFER_TTL,
PMP_INPUT_BUFFER_SCHMITT
} PMP_INPUT_BUFFER_TYPE;
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Description
PMP Input Buffers type
This data type defines the input buffer types.
Members
Members Description
PMP_INPUT_BUFFER_TTL TTL input buffer
PMP_INPUT_BUFFER_SCHMITT schmitt trigger input buffer
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.15 PMP_INTERRUPT_MODE Enumeration
C
typedef enum {
PMP_INTERRUPT_BUFFER_3_IS_ACCESSED,
PMP_INTERRUPT_EVERY_RW_CYCLE,
PMP_INTERRUPT_NONE
} PMP_INTERRUPT_MODE;
Description
PMP Interrupt Mode
This data type defines the different configurations by which the PMP can be configured for interrupt requests.
Members
Members Description
PMP_INTERRUPT_BUFFER_3_IS_ACCESSED Interrupt generated when Read/Write Buffer 3 is read/written
PMP_INTERRUPT_EVERY_RW_CYCLE Interupt Occurs Every Read/Write Cycle
PMP_INTERRUPT_NONE No interrupt generated
Remarks
None.
5.6.16.6.16.16 PMP_MASTER_MODE Enumeration
C
typedef enum {
PMP_ALTERNATE_MASTER_DIRECT,
PMP_ALTERNATE_MASTER,
PMP_CPU_MASTER
} PMP_MASTER_MODE;
Description
PMP Master Modes
This data type defines the different configurations by which the PMP can be enabled.
Members
Members Description
PMP_ALTERNATE_MASTER_DIRECT Alternate Master has PMP control with Direct I/O access
PMP_ALTERNATE_MASTER Alternate Master has PMP control
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PMP_CPU_MASTER CPU has PMP control
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.17 PMP_MODULE_ID Enumeration
C
typedef enum {
PMP_ID_0
} PMP_MODULE_ID;
Description
PMP module ID
This data type defines the possible instances of the PMP module.
Members
Members Description
PMP_ID_0 first instance of the PMP
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.18 PMP_MUX_MODE Enumeration
C
typedef enum {
PMP_MUX_ADDRESS_PHASES_3,
PMP_MUX_ADDRESS_PHASES_2,
PMP_MUX_ADDRESS_PHASES_1,
PMP_MUX_LINES_16_ADDRESS_16_DATA,
PMP_MUX_LINES_16_ADDRESS_8_DATA,
PMP_MUX_LINES_8_ADDRESS_8_DATA,
PMP_MUX_NONE
} PMP_MUX_MODE;
Description
PMP Multiplex Modes
This data type defines the different configurations by which the PMP can be enabled.
Members
Members Description
PMP_MUX_ADDRESS_PHASES_3 Lower address bits are multiplexed with data bits using 3 address phase
PMP_MUX_ADDRESS_PHASES_2 Lower address bits are multiplexed with data bits using 2 address phases
PMP_MUX_ADDRESS_PHASES_1 Lower address bits are multiplexed with data bits using 1 address phase
PMP_MUX_LINES_16_ADDRESS_16_DATA 16 address lines are multiplexed on 16 data lines
PMP_MUX_LINES_16_ADDRESS_8_DATA 16 address lines multiplexed on 8 data lines
PMP_MUX_LINES_8_ADDRESS_8_DATA 8 bits of address is multiplexed on 8 data lines
PMP_MUX_NONE No multiplexing of address and data lines
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
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5.6.16.6.16.19 PMP_OPERATION_MODE Enumeration
C
typedef enum {
PMP_MASTER_READ_WRITE_STROBES_MULTIPLEXED,
PMP_MASTER_READ_WRITE_STROBES_INDEPENDENT,
PMP_BUFFERED_SLAVE,
PMP_ENHANCED_SLAVE,
PMP_LEGACY_SLAVE
} PMP_OPERATION_MODE;
Description
PMP Operation Modes
This data type defines the different configurations by which the PMP can be enabled.
Members
Members Description
PMP_MASTER_READ_WRITE_STROBES_MULTIPLEXED Master mode 1, the read and the write strobes share a single line.
The enable strobe is used to decode the info sent on read/write
strobe line
PMP_MASTER_READ_WRITE_STROBES_INDEPENDENT Master mode 2, the read and write strobes are on independent
lines
PMP_BUFFERED_SLAVE Buffered Slave mode
PMP_ENHANCED_SLAVE Enhanced Slave mode
PMP_LEGACY_SLAVE Legacy Parallel Slave mode
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.16.20 PMP_PMBE_PORT Enumeration
C
typedef enum {
PMBE_0,
PMBE_1
} PMP_PMBE_PORT;
Description
PMP Byte Enable port.
This data type defines the available Byte Enable ports.
Members
Members Description
PMBE_0 Byte Enable Port-0
PMBE_1 Byte Enable Port-1
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
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5.6.16.6.16.21 PMP_POLARITY_LEVEL Enumeration
C
typedef enum {
PMP_POLARITY_ACTIVE_HIGH,
PMP_POLARITY_ACTIVE_LOW
} PMP_POLARITY_LEVEL;
Description
PMP Pins Polarity
This data type defines the possible polarity levels for the PMP pins.
Members
Members Description
PMP_POLARITY_ACTIVE_HIGH Active high polarity
PMP_POLARITY_ACTIVE_LOW Active low polarity
Remarks
None.
5.6.16.6.16.22 PMP_STROBE_WAIT_STATES Enumeration
C
typedef enum {
PMP_STROBE_WAIT_FIFTEEN,
PMP_STROBE_WAIT_FOURTEEN,
PMP_STROBE_WAIT_THIRTEEN,
PMP_STROBE_WAIT_TWELVE,
PMP_STROBE_WAIT_ELEVEN,
PMP_STROBE_WAIT_TEN,
PMP_STROBE_WAIT_NINE,
PMP_STROBE_WAIT_EIGHT,
PMP_STROBE_WAIT_SEVEN,
PMP_STROBE_WAIT_SIX,
PMP_STROBE_WAIT_FIVE,
PMP_STROBE_WAIT_FOUR,
PMP_STROBE_WAIT_THREE,
PMP_STROBE_WAIT_TWO,
PMP_STROBE_WAIT_ONE,
PMP_STROBE_WAIT_NONE
} PMP_STROBE_WAIT_STATES;
Description
PMP Read to Byte enable strobe configuration
This data type defines the different configurations by which the PMP strobe wait signal time can be configured.
Members
Members Description
PMP_STROBE_WAIT_FIFTEEN Strobe Wait of 15 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_FOURTEEN Strobe Wait of 14 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_THIRTEEN Strobe Wait of 13 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_TWELVE Strobe Wait of 12 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_ELEVEN Strobe Wait of 11 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_TEN Strobe Wait of 10 Peripheral Bus Clock Cycles
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PMP_STROBE_WAIT_NINE Strobe Wait of 9 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_EIGHT Strobe Wait of 8 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_SEVEN Strobe Wait of 7 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_SIX Strobe Wait of 6 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_FIVE Strobe Wait of 5 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_FOUR Strobe Wait of 4 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_THREE Strobe Wait of 3 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_TWO Strobe Wait of 2 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_ONE Strobe Wait of 1 Peripheral Bus Clock Cycles
PMP_STROBE_WAIT_NONE No wait states
Remarks
This enumeration is processor specific and is defined in the processor- specific header files (see processor.h).
5.6.16.6.17 Feature Existence Functions
5.6.16.6.17.1 PLIB_PMP_ExistsAddressControl Function
C
bool PLIB_PMP_ExistsAddressControl(
PMP_MODULE_ID index
);
Description
This interface identifies that the AddressControl feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_AddressSet
• PLIB_PMP_AddressLinesA0A1Set
• PLIB_PMP_AddressLinesA0A1Get
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AddressControl feature is supported on the device
• false - The AddressControl feature is not supported on the device
Remarks
None.
5.6.16.6.17.2 PLIB_PMP_ExistsAddressLatchPolarity Function
C
bool PLIB_PMP_ExistsAddressLatchPolarity(
PMP_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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);
Description
This interface identifies that the AddressLatchPolarity feature is available on the PMP module. When this interface returns true,
this function is supported on the device:
• PLIB_PMP_AddressLatchPolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AddressLatchPolarity feature is supported on the device
• false - The AddressLatchPolarity feature is not supported on the device
Remarks
None.
5.6.16.6.17.3 PLIB_PMP_ExistsAddressLatchStrobePortControl Function
C
bool PLIB_PMP_ExistsAddressLatchStrobePortControl(
PMP_MODULE_ID index
);
Description
This interface identifies that the AddressLatchStrobePortControl feature is available on the PMP module. When this interface
returns true, these functions are supported on the device:
• PLIB_PMP_AddressLatchStrobeEnable
• PLIB_PMP_AddressLatchStrobeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AddressLatchStrobePortControl feature is supported on the device
• false - The AddressLatchStrobePortControl feature is not supported on the device
Remarks
None.
5.6.16.6.17.4 PLIB_PMP_ExistsAddressPortPinControl Function
C
bool PLIB_PMP_ExistsAddressPortPinControl(
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PMP_MODULE_ID index
);
Description
This interface identifies that the AddressPortPinControl feature is available on the PMP module. When this interface returns true,
these functions are supported on the device:
• PLIB_PMP_AddressPortEnable
• PLIB_PMP_AddressPortDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AddressPortPinControl feature is supported on the device
• false - The AddressPortPinControl feature is not supported on the device
Remarks
None.
5.6.16.6.17.5 PLIB_PMP_ExistsAltMasterRequest Function
C
bool PLIB_PMP_ExistsAltMasterRequest(
PMP_MODULE_ID index
);
Description
This interface identifies that the AltMasterRequest feature is available on the PMP module. When this interface returns true,
these functions are supported on the device:
• PLIB_PMP_AlternateMasterRequestStatus
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AltMasterRequest feature is supported on the device
• false - The AltMasterRequest feature is not supported on the device
Remarks
None.
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5.6.16.6.17.6 PLIB_PMP_ExistsBufferOverFlow Function
C
bool PLIB_PMP_ExistsBufferOverFlow(
PMP_MODULE_ID index
);
Description
This interface identifies that the BufferOverFlow feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_InputOverflowHasOccurred
• PLIB_PMP_InputOverflowClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BufferOverFlow feature is supported on the device
• false - The BufferOverFlow feature is not supported on the device
Remarks
None.
5.6.16.6.17.7 PLIB_PMP_ExistsBufferRead Function
C
bool PLIB_PMP_ExistsBufferRead(
PMP_MODULE_ID index
);
Description
This interface identifies that the BufferRead feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_InputBufferXByteReceive
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BufferRead feature is supported on the device
• false - The BufferRead feature is not supported on the device
Remarks
None.
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5.6.16.6.17.8 PLIB_PMP_ExistsBufferType Function
C
bool PLIB_PMP_ExistsBufferType(
PMP_MODULE_ID index
);
Description
This interface identifies that the BufferType feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_InputBufferTypeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BufferType feature is supported on the device
• false - The BufferType feature is not supported on the device
Remarks
None.
5.6.16.6.17.9 PLIB_PMP_ExistsBufferUnderFlow Function
C
bool PLIB_PMP_ExistsBufferUnderFlow(
PMP_MODULE_ID index
);
Description
This interface identifies that the BufferUnderFlow feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_OutputUnderflowHasOccurred
• PLIB_PMP_OutputUnderflowClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BufferUnderFlow feature is supported on the device
• false - The BufferUnderFlow feature is not supported on the device
Remarks
None.
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5.6.16.6.17.10 PLIB_PMP_ExistsBufferWrite Function
C
bool PLIB_PMP_ExistsBufferWrite(
PMP_MODULE_ID index
);
Description
This interface identifies that the BufferWrite feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_OutputBufferXByteSend
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BufferWrite feature is supported on the device
• false - The BufferWrite feature is not supported on the device
Remarks
None.
5.6.16.6.17.11 PLIB_PMP_ExistsBusKeeper Function
C
bool PLIB_PMP_ExistsBusKeeper(
PMP_MODULE_ID index
);
Description
This interface identifies that the BusKeeper feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_BusKeeperEnable
• PLIB_PMP_BusKeeperDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BusKeeper feature is supported on the device
• false - The BusKeeper feature is not supported on the device
Remarks
None.
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5.6.16.6.17.12 PLIB_PMP_ExistsBusyStatus Function
C
bool PLIB_PMP_ExistsBusyStatus(
PMP_MODULE_ID index
);
Description
This interface identifies that the BusyStatus feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_PortIsBusy
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BusyStatus feature is supported on the device
• false - The BusyStatus feature is not supported on the device
Remarks
None.
5.6.16.6.17.13 PLIB_PMP_ExistsByteEnablePolarity Function
C
bool PLIB_PMP_ExistsByteEnablePolarity(
PMP_MODULE_ID index
);
Description
This interface identifies that the ByteEnablePolarity feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_ByteEnablePolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ByteEnablePolarity feature is supported on the device
• false - The ByteEnablePolarity feature is not supported on the device
Remarks
None.
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5.6.16.6.17.14 PLIB_PMP_ExistsByteEnablePortControl Function
C
bool PLIB_PMP_ExistsByteEnablePortControl(
PMP_MODULE_ID index
);
Description
This interface identifies that the ByteEnablePortControl feature is available on the PMP module. When this interface returns true,
these functions are supported on the device:
• PLIB_PMP_ByteEnablePortEnable
• PLIB_PMP_ByteEnablePortDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ByteEnablePortControl feature is supported on the device
• false - The ByteEnablePortControl feature is not supported on the device
Remarks
None.
5.6.16.6.17.15 PLIB_PMP_ExistsChipSelectEnable Function
C
bool PLIB_PMP_ExistsChipSelectEnable(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipSelectEnable feature is available on the PMP module. When this interface returns true,
these functions are supported on the device:
• PLIB_PMP_ChipSelectXEnable
• PLIB_PMP_ChipSelectXDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipSelectEnable feature is supported on the device
• false - The ChipSelectEnable feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Remarks
None.
5.6.16.6.17.16 PLIB_PMP_ExistsChipSelectoperation Function
C
bool PLIB_PMP_ExistsChipSelectoperation(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipSelectoperation feature is available on the PMP module. When this interface returns true,
this function is supported on the device:
• PLIB_PMP_ChipSelectFunctionSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipSelectoperation feature is supported on the device
• false - The ChipSelectoperation feature is not supported on the device
Remarks
None.
5.6.16.6.17.17 PLIB_PMP_ExistsChipXACKMode Function
C
bool PLIB_PMP_ExistsChipXACKMode(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXACKMode feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_ChipXAckModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXACKMode feature is supported on the device
• false - The ChipXACKMode feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Remarks
None.
5.6.16.6.17.18 PLIB_PMP_ExistsChipXACKPolarity Function
C
bool PLIB_PMP_ExistsChipXACKPolarity(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXACKPolarity feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_ChipSelectXAckPolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXACKPolarity feature is supported on the device
• false - The ChipXACKPolarity feature is not supported on the device
Remarks
None.
5.6.16.6.17.19 PLIB_PMP_ExistsChipXAltMasterWaitStates Function
C
bool PLIB_PMP_ExistsChipXAltMasterWaitStates(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXAltMasterWaitStates feature is available on the PMP module. When this interface returns
true, this function is supported on the device:
• PLIB_PMP_ChipXWaitStatesAlternateMasterSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXAltMasterWaitStates feature is supported on the device
• false - The ChipXAltMasterWaitStates feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Remarks
None.
5.6.16.6.17.20 PLIB_PMP_ExistsChipXBaseAddress Function
C
bool PLIB_PMP_ExistsChipXBaseAddress(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXBaseAddress feature is available on the PMP module. When this interface returns true,
this function is supported on the device:
• PLIB_PMP_ChipXBaseAddressSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXBaseAddress feature is supported on the device
• false - The ChipXBaseAddress feature is not supported on the device
Remarks
None.
5.6.16.6.17.21 PLIB_PMP_ExistsChipXByteEnablePolarity Function
C
bool PLIB_PMP_ExistsChipXByteEnablePolarity(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXByteEnablePolarity feature is available on the PMP module. When this interface returns
true, this function is supported on the device:
• PLIB_PMP_ChipSelectXByteEnablePortPolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXByteEnablePolarity feature is supported on the device
• false - The ChipXByteEnablePolarity feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Remarks
None.
5.6.16.6.17.22 PLIB_PMP_ExistsChipXDataHoldWaitStates Function
C
bool PLIB_PMP_ExistsChipXDataHoldWaitStates(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXDataHoldWaitStates feature is available on the PMP module. When this interface returns
true, this function is supported on the device:
• PLIB_PMP_ChipXWaitStatesDataHoldSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXDataHoldWaitStates feature is supported on the device
• false - The ChipXDataHoldWaitStates feature is not supported on the device
Remarks
None.
5.6.16.6.17.23 PLIB_PMP_ExistsChipXDataSetupWaitStates Function
C
bool PLIB_PMP_ExistsChipXDataSetupWaitStates(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXDataSetupWaitStates feature is available on the PMP module. When this interface returns
true, this function is supported on the device:
• PLIB_PMP_ChipXWaitStatesDataSetupSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXDataSetupWaitStates feature is supported on the device
• false - The ChipXDataSetupWaitStates feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Remarks
None.
5.6.16.6.17.24 PLIB_PMP_ExistsChipXDataSize Function
C
bool PLIB_PMP_ExistsChipXDataSize(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXDataSize feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_ChipXDataSizeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXDataSize feature is supported on the device
• false - The ChipXDataSize feature is not supported on the device
Remarks
None.
5.6.16.6.17.25 PLIB_PMP_ExistsChipXEnableStorbeSelect Function
C
bool PLIB_PMP_ExistsChipXEnableStorbeSelect(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXEnableStorbeSelect feature is available on the PMP module. When this interface returns
true, these functions are supported on the device:
• PLIB_PMP_ChipSelectXEnableStrobeSelect
• PLIB_PMP_ChipSelectXEnableStrobeDeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXEnableStorbeSelect feature is supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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• false - The ChipXEnableStorbeSelect feature is not supported on the device
Remarks
None.
5.6.16.6.17.26 PLIB_PMP_ExistsChipXPolarity Function
C
bool PLIB_PMP_ExistsChipXPolarity(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXPolarity feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_ChipSelectXPolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXPolarity feature is supported on the device
• false - The ChipXPolarity feature is not supported on the device
Remarks
None.
5.6.16.6.17.27 PLIB_PMP_ExistsChipXReadWritePolarity Function
C
bool PLIB_PMP_ExistsChipXReadWritePolarity(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXReadWritePolarity feature is available on the PMP module. When this interface returns
true, this function is supported on the device:
• PLIB_PMP_ChipSelectXReadWriteStrobePolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXReadWritePolarity feature is supported on the device
• false - The ChipXReadWritePolarity feature is not supported on the device
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Remarks
None.
5.6.16.6.17.28 PLIB_PMP_ExistsChipXStrobeWaitStates Function
C
bool PLIB_PMP_ExistsChipXStrobeWaitStates(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXStrobeWaitStates feature is available on the PMP module. When this interface returns
true, this function is supported on the device:
• PLIB_PMP_ChipXWaitStatesStrobeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXStrobeWaitStates feature is supported on the device
• false - The ChipXStrobeWaitStates feature is not supported on the device
Remarks
None.
5.6.16.6.17.29 PLIB_PMP_ExistsChipXWriteEnablePolarity Function
C
bool PLIB_PMP_ExistsChipXWriteEnablePolarity(
PMP_MODULE_ID index
);
Description
This interface identifies that the ChipXWriteEnablePolarity feature is available on the PMP module. When this interface returns
true, this function is supported on the device:
• PLIB_PMP_ChipSelectXWriteEnableStrobePolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipXWriteEnablePolarity feature is supported on the device
• false - The ChipXWriteEnablePolarity feature is not supported on the device
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Remarks
None.
5.6.16.6.17.30 PLIB_PMP_ExistsCSXActiveStatus Function
C
bool PLIB_PMP_ExistsCSXActiveStatus(
PMP_MODULE_ID index
);
Description
This interface identifies that the CSXActiveStatus feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_ChipSelectXIsActive
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CSXActiveStatus feature is supported on the device
• false - The CSXActiveStatus feature is not supported on the device
Remarks
None.
5.6.16.6.17.31 PLIB_PMP_ExistsCSXPortControl Function
C
bool PLIB_PMP_ExistsCSXPortControl(
PMP_MODULE_ID index
);
Description
This interface identifies that the CSXPortControl feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_ChipSelectXPortEnable
• PLIB_PMP_ChipSelectXPortDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CSXPortControl feature is supported on the device
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• false - The CSXPortControl feature is not supported on the device
Remarks
None.
5.6.16.6.17.32 PLIB_PMP_ExistsCurrentMaster Function
C
bool PLIB_PMP_ExistsCurrentMaster(
PMP_MODULE_ID index
);
Description
This interface identifies that the CurrentMaster feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_AlternateMasterHasAccess
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CurrentMaster feature is supported on the device
• false - The CurrentMaster feature is not supported on the device
Remarks
None.
5.6.16.6.17.33 PLIB_PMP_ExistsDataHoldWaitStates Function
C
bool PLIB_PMP_ExistsDataHoldWaitStates(
PMP_MODULE_ID index
);
Description
This interface identifies that the DataHoldWaitStates feature is available on the PMP module. When this interface returns true,
this function is supported on the device:
• PLIB_PMP_WaitStatesDataHoldSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataHoldWaitStates feature is supported on the device
• false - The DataHoldWaitStates feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Remarks
None.
5.6.16.6.17.34 PLIB_PMP_ExistsDataSetUpWaitStates Function
C
bool PLIB_PMP_ExistsDataSetUpWaitStates(
PMP_MODULE_ID index
);
Description
This interface identifies that the DataSetUpWaitStates feature is available on the PMP module. When this interface returns true,
this function is supported on the device:
• PLIB_PMP_WaitStatesDataSetUpSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataSetUpWaitStates feature is supported on the device
• false - The DataSetUpWaitStates feature is not supported on the device
Remarks
None.
5.6.16.6.17.35 PLIB_PMP_ExistsDataStrobeWaitStates Function
C
bool PLIB_PMP_ExistsDataStrobeWaitStates(
PMP_MODULE_ID index
);
Description
This interface identifies that the DataStrobeWaitStates feature is available on the PMP module. When this interface returns true,
this function is supported on the device:
• PLIB_PMP_WaitStatesStrobeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataStrobeWaitStates feature is supported on the device
• false - The DataStrobeWaitStates feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Remarks
None.
5.6.16.6.17.36 PLIB_PMP_ExistsDataTransferSize Function
C
bool PLIB_PMP_ExistsDataTransferSize(
PMP_MODULE_ID index
);
Description
This interface identifies that the DataTransferSize feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_DataSizeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataTransferSize feature is supported on the device
• false - The DataTransferSize feature is not supported on the device
Remarks
None.
5.6.16.6.17.37 PLIB_PMP_ExistsEnableControl Function
C
bool PLIB_PMP_ExistsEnableControl(
PMP_MODULE_ID index
);
Description
This interface identifies that the EnableControl feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_Disable
• PLIB_PMP_Enable
• PLIB_PMP_IsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The EnableControl feature is supported on the device
• false - The EnableControl feature is not supported on the device
Remarks
None.
5.6.16.6.17.38 PLIB_PMP_ExistsEnhancedMasterMode Function
C
bool PLIB_PMP_ExistsEnhancedMasterMode(
PMP_MODULE_ID index
);
Description
This interface identifies that the EnhancedMasterMode feature is available on the PMP module. When this interface returns true,
these functions are supported on the device:
• PLIB_PMP_EnhancedMasterModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EnhancedMasterMode feature is supported on the device
• false - The EnhancedMasterMode feature is not supported on the device
Remarks
None.
5.6.16.6.17.39 PLIB_PMP_ExistsIncrementMode Function
C
bool PLIB_PMP_ExistsIncrementMode(
PMP_MODULE_ID index
);
Description
This interface identifies that the IncrementMode feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_AddressIncrementModeSelect
• PLIB_PMP_AddressIncrementModeGet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The IncrementMode feature is supported on the device
• false - The IncrementMode feature is not supported on the device
Remarks
None.
5.6.16.6.17.40 PLIB_PMP_ExistsInputBufferFull Function
C
bool PLIB_PMP_ExistsInputBufferFull(
PMP_MODULE_ID index
);
Description
This interface identifies that the InputBufferFull feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_InputBuffersAreFull
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The InputBufferFull feature is supported on the device
• false - The InputBufferFull feature is not supported on the device
Remarks
None.
5.6.16.6.17.41 PLIB_PMP_ExistsInputBufferXStatus Function
C
bool PLIB_PMP_ExistsInputBufferXStatus(
PMP_MODULE_ID index
);
Description
This interface identifies that the InputBufferXStatus feature is available on the PMP module. When this interface returns true,
these functions are supported on the device:
• PLIB_PMP_InputBufferXIsFull
• PLIB_PMP_IsDataReceived
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The InputBufferXStatus feature is supported on the device
• false - The InputBufferXStatus feature is not supported on the device
Remarks
None.
5.6.16.6.17.42 PLIB_PMP_ExistsInterruptMode Function
C
bool PLIB_PMP_ExistsInterruptMode(
PMP_MODULE_ID index
);
Description
This interface identifies that the InterruptMode feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_InterruptModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The InterruptMode feature is supported on the device
• false - The InterruptMode feature is not supported on the device
Remarks
None.
5.6.16.6.17.43 PLIB_PMP_ExistsMasterRXTX Function
C
bool PLIB_PMP_ExistsMasterRXTX(
PMP_MODULE_ID index
);
Description
This interface identifies that the MasterRXTX feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_MasterSend
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• PLIB_PMP_MasterReceive
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MasterRXTX feature is supported on the device
• false - The MasterRXTX feature is not supported on the device
Remarks
None.
5.6.16.6.17.44 PLIB_PMP_ExistsMUXModeSelect Function
C
bool PLIB_PMP_ExistsMUXModeSelect(
PMP_MODULE_ID index
);
Description
This interface identifies that the MUXModeSelect feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_MultiplexModeSelect
• PLIB_PMP_MultiplexModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MUXModeSelect feature is supported on the device
• false - The MUXModeSelect feature is not supported on the device
Remarks
None.
5.6.16.6.17.45 PLIB_PMP_ExistsOperationMode Function
C
bool PLIB_PMP_ExistsOperationMode(
PMP_MODULE_ID index
);
Description
This interface identifies that the OperationMode feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
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• PLIB_PMP_OperationModeSelect
• PLIB_PMP_OperationModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OperationMode feature is supported on the device
• false - The OperationMode feature is not supported on the device
Remarks
None.
5.6.16.6.17.46 PLIB_PMP_ExistsOutPutBufferEmpty Function
C
bool PLIB_PMP_ExistsOutPutBufferEmpty(
PMP_MODULE_ID index
);
Description
This interface identifies that the OutPutBufferEmpty feature is available on the PMP module. When this interface returns true,
this function is supported on the device:
• PLIB_PMP_OutputBuffersAreEmpty
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OutPutBufferEmpty feature is supported on the device
• false - The OutPutBufferEmpty feature is not supported on the device
Remarks
None.
5.6.16.6.17.47 PLIB_PMP_ExistsOutputBufferXStatus Function
C
bool PLIB_PMP_ExistsOutputBufferXStatus(
PMP_MODULE_ID index
);
Description
This interface identifies that the OutputBufferXStatus feature is available on the PMP module. When this interface returns true,
these functions are supported on the device:
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• PLIB_PMP_OutputBufferXIsEmpty
• PLIB_PMP_IsDataTransmitted
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OutputBufferXStatus feature is supported on the device
• false - The OutputBufferXStatus feature is not supported on the device
Remarks
None.
5.6.16.6.17.48 PLIB_PMP_ExistsReadWritePolarity Function
C
bool PLIB_PMP_ExistsReadWritePolarity(
PMP_MODULE_ID index
);
Description
This interface identifies that the ReadWritePolarity feature is available on the PMP module. When this interface returns true, this
function is supported on the device:
• PLIB_PMP_ReadWriteStrobePolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReadWritePolarity feature is supported on the device
• false - The ReadWritePolarity feature is not supported on the device
Remarks
None.
5.6.16.6.17.49 PLIB_PMP_ExistsReadWriteStrobePortControl Function
C
bool PLIB_PMP_ExistsReadWriteStrobePortControl(
PMP_MODULE_ID index
);
Description
This interface identifies that the ReadWriteStrobePortControl feature is available on the PMP module. When this interface
returns true, these functions are supported on the device:
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• PLIB_PMP_ReadWriteStrobePortEnable
• PLIB_PMP_ReadWriteStrobePortDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReadWriteStrobePortControl feature is supported on the device
• false - The ReadWriteStrobePortControl feature is not supported on the device
Remarks
None.
5.6.16.6.17.50 PLIB_PMP_ExistsReservedAddrSpace Function
C
bool PLIB_PMP_ExistsReservedAddrSpace(
PMP_MODULE_ID index
);
Description
This interface identifies that the ReservedAddrSpace feature is available on the PMP module. When this interface returns true,
these functions are supported on the device:
• PLIB_PMP_ReservedAddressSpaceBitsSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReservedAddrSpace feature is supported on the device
• false - The ReservedAddrSpace feature is not supported on the device
Remarks
None.
5.6.16.6.17.51 PLIB_PMP_ExistsSlaveRX Function
C
bool PLIB_PMP_ExistsSlaveRX(
PMP_MODULE_ID index
);
Description
This interface identifies that the SlaveRX feature is available on the PMP module. When this interface returns true, this function
is supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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• PLIB_PMP_SlaveReceive
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SlaveRX feature is supported on the device
• false - The SlaveRX feature is not supported on the device
Remarks
None.
5.6.16.6.17.52 PLIB_PMP_ExistsSlaveTX Function
C
bool PLIB_PMP_ExistsSlaveTX(
PMP_MODULE_ID index
);
Description
This interface identifies that the SlaveTX feature is available on the PMP module. When this interface returns true, this function is
supported on the device:
• PLIB_PMP_SlaveSend
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SlaveTX feature is supported on the device
• false - The SlaveTX feature is not supported on the device
Remarks
None.
5.6.16.6.17.53 PLIB_PMP_ExistsSmartAddress Function
C
bool PLIB_PMP_ExistsSmartAddress(
PMP_MODULE_ID index
);
Description
This interface identifies that the SmartAddress feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
• PLIB_PMP_SmartAddressStrobeEnable
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• PLIB_PMP_SmartAddressStrobeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SmartAddress feature is supported on the device
• false - The SmartAddress feature is not supported on the device
Remarks
None.
5.6.16.6.17.54 PLIB_PMP_ExistsStopInIdleControl Function
C
bool PLIB_PMP_ExistsStopInIdleControl(
PMP_MODULE_ID index
);
Description
This interface identifies that the StopInIdleControl feature is available on the PMP module. When this interface returns true,
these functions are supported on the device:
• PLIB_PMP_StopInIdleEnable
• PLIB_PMP_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StopInIdleControl feature is supported on the device
• false - The StopInIdleControl feature is not supported on the device
Remarks
None.
5.6.16.6.17.55 PLIB_PMP_ExistsTransactionError Function
C
bool PLIB_PMP_ExistsTransactionError(
PMP_MODULE_ID index
);
Description
This interface identifies that the TransactionError feature is available on the PMP module. When this interface returns true, these
functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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• PLIB_PMP_TransactionErrorHasOccurred
• PLIB_PMP_TransactionErrorClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransactionError feature is supported on the device
• false - The TransactionError feature is not supported on the device
Remarks
None.
5.6.16.6.17.56 PLIB_PMP_ExistsTransactionTimeOut Function
C
bool PLIB_PMP_ExistsTransactionTimeOut(
PMP_MODULE_ID index
);
Description
This interface identifies that the TransactionTimeOut feature is available on the PMP module. When this interface returns true,
these functions are supported on the device:
• PLIB_PMP_TransactionHasTimedOut
• PLIB_PMP_TransactionTimeoutClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransactionTimeOut feature is supported on the device
• false - The TransactionTimeOut feature is not supported on the device
Remarks
None.
5.6.16.6.17.57 PLIB_PMP_ExistsWaitStatesAddrHoldStrobe Function
C
bool PLIB_PMP_ExistsWaitStatesAddrHoldStrobe(
PMP_MODULE_ID index
);
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Description
This interface identifies that the WaitStatesAddrHoldStrobe feature is available on the PMP module. When this interface returns
true, these functions are supported on the device:
• PLIB_PMP_WaitStatesAddressHoldStrobeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WaitStatesAddrHoldStrobe feature is supported on the device
• false - The WaitStatesAddrHoldStrobe feature is not supported on the device
Remarks
None.
5.6.16.6.17.58 PLIB_PMP_ExistsWaitStatesAddrLatchStrobe Function
C
bool PLIB_PMP_ExistsWaitStatesAddrLatchStrobe(
PMP_MODULE_ID index
);
Description
This interface identifies that the WaitStatesAddrLatchStrobe feature is available on the PMP module. When this interface returns
true, these functions are supported on the device:
• PLIB_PMP_WaitStatesAddressLatchStrobeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WaitStatesAddrLatchStrobe feature is supported on the device
• false - The WaitStatesAddrLatchStrobe feature is not supported on the device
Remarks
None.
5.6.16.6.17.59 PLIB_PMP_ExistsWriteEnablePolarity Function
C
bool PLIB_PMP_ExistsWriteEnablePolarity(
PMP_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help PMP Peripheral Library
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Description
This interface identifies that the WriteEnablePolarity feature is available on the PMP module. When this interface returns true,
this function is supported on the device:
• PLIB_PMP_WriteEnableStrobePolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WriteEnablePolarity feature is supported on the device
• false - The WriteEnablePolarity feature is not supported on the device
Remarks
None.
5.6.16.6.17.60 PLIB_PMP_ExistsWriteEnablePortControl Function
C
bool PLIB_PMP_ExistsWriteEnablePortControl(
PMP_MODULE_ID index
);
Description
This interface identifies that the WriteEnablePortControl feature is available on the PMP module. When this interface returns
true, these functions are supported on the device:
• PLIB_PMP_WriteEnableStrobePortEnable
• PLIB_PMP_WriteEnableStrobePortDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WriteEnablePortControl feature is supported on the device
• false - The WriteEnablePortControl feature is not supported on the device
Remarks
None.
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5.6.16.7 Files
Files
Name Description
plib_pmp.h Parallel Master Port (PMP) Peripheral Library Interface Header.
Description
5.6.16.7.1 plib_pmp.h
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
PMP Peripheral Library.
Functions
Name Description
PLIB_PMP_AddressGet Gets the current address of the PMP module.
PLIB_PMP_AddressIncrementModeGet Gets the increment mode being used with the address
of the PMP module.
PLIB_PMP_AddressIncrementModeSelect Configures the increment mode being used with the
address of the PMP module.
PLIB_PMP_AddressLatchPolaritySelect Sets the address latch strobe polarity.
PLIB_PMP_AddressLatchStrobeDisable Disables the specific address latch strobe.
PLIB_PMP_AddressLatchStrobeEnable Enables the specific address latch strobe.
PLIB_PMP_AddressLinesA0A1Get Gets the value of the address lines PMA0 and PMA1.
PLIB_PMP_AddressLinesA0A1Set Sets the address lines PMA0 and PMA1 with the value
specified.
PLIB_PMP_AddressPortDisable Disables the port lines specified as PMP address lines.
PLIB_PMP_AddressPortEnable Enables the port lines specified as PMP address lines.
PLIB_PMP_AddressSet Sets the current address of the PMP module to the
specified address.
PLIB_PMP_AlternateMasterHasAccess Gets the status of which alternate masters have gained
access to the PMP module.
PLIB_PMP_AlternateMasterRequestStatus Gets the status of the request from the alternate master.
PLIB_PMP_BusKeeperDisable Disables the bus keeper (high-impedance) state.
PLIB_PMP_BusKeeperEnable Enables the bus keeper (high-impedance) state.
PLIB_PMP_ByteEnablePolaritySelect Sets the byte enable polarity.
PLIB_PMP_ByteEnablePortDisable Disables the byte enable port.
PLIB_PMP_ByteEnablePortEnable Enables the byte enable port.
PLIB_PMP_ChipSelectFunctionSelect Defines the functionality of the pins intended to be used
as Chip Select.
PLIB_PMP_ChipSelectXAckPolaritySelect Sets the Chip Select acknowledge polarity.
PLIB_PMP_ChipSelectXByteEnablePortPolaritySelect Sets the nibble/byte enable polarity.
PLIB_PMP_ChipSelectXDisable Configures the Chip Select.
PLIB_PMP_ChipSelectXEnable Configures the Chip Select.
PLIB_PMP_ChipSelectXEnableStrobeDeSelect Selects the read and write strobes. The enable strobe is
not selected (not required).
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PLIB_PMP_ChipSelectXEnableStrobeSelect Selects the read/write and enable strobes.
PLIB_PMP_ChipSelectXIsActive Gets the current status of the specified Chip Select.
PLIB_PMP_ChipSelectXPolaritySelect Sets the specified Chip Select polarity.
PLIB_PMP_ChipSelectXPortDisable Disables the specified Chip Select's port.
PLIB_PMP_ChipSelectXPortEnable Enables the specified Chip Select's port.
PLIB_PMP_ChipSelectXReadWriteStrobePolaritySelect Sets the read/write strobe polarity.
PLIB_PMP_ChipSelectXWriteEnableStrobePolaritySelect Sets the write/enable strobe polarity.
PLIB_PMP_ChipXAckModeSelect Selects the acknowledge mode for the PMP module.
PLIB_PMP_ChipXBaseAddressSet Sets the base address of the specified device.
PLIB_PMP_ChipXDataSizeSelect Enables data transfer size for the PMP for the specified
device.
PLIB_PMP_ChipXWaitStatesAlternateMasterSelect Selects the wait states of the alternate master for Chip
Select-X.
PLIB_PMP_ChipXWaitStatesDataHoldSelect Configures the data hold states (after data transfer)
needed to be used with the PMP module for the
specified device.
PLIB_PMP_ChipXWaitStatesDataSetupSelect Configures the data wait states (before the data
transfer) needed to be used with the PMP module for
the specified device.
PLIB_PMP_ChipXWaitStatesStrobeSelect Configures the strobe wait states (during the data
transfer) needed to be used with the PMP module for
the specified device.
PLIB_PMP_DataSizeSelect Enables data transfer size for the PMP module.
PLIB_PMP_Disable Disables the specific PMP module.
PLIB_PMP_Enable Enables the specific PMP module.
PLIB_PMP_EnhancedMasterModeSelect Selects Master mode for the PMP module.
PLIB_PMP_ExistsAddressControl Identifies that the AddressControl feature exists on the
PMP module.
PLIB_PMP_ExistsAddressLatchPolarity Identifies that the AddressLatchPolarity feature exists on
the PMP module.
PLIB_PMP_ExistsAddressLatchStrobePortControl Identifies that the AddressLatchStrobePortControl
feature exists on the PMP module.
PLIB_PMP_ExistsAddressPortPinControl Identifies that the AddressPortPinControl feature exists
on the PMP module.
PLIB_PMP_ExistsAltMasterRequest Identifies that the AltMasterRequest feature exists on
the PMP module.
PLIB_PMP_ExistsBufferOverFlow Identifies that the BufferOverFlow feature exists on the
PMP module.
PLIB_PMP_ExistsBufferRead Identifies that the BufferRead feature exists on the PMP
module.
PLIB_PMP_ExistsBufferType Identifies that the BufferType feature exists on the PMP
module.
PLIB_PMP_ExistsBufferUnderFlow Identifies that the BufferUnderFlow feature exists on the
PMP module.
PLIB_PMP_ExistsBufferWrite Identifies that the BufferWrite feature exists on the PMP
module.
PLIB_PMP_ExistsBusKeeper Identifies that the BusKeeper feature exists on the PMP
module.
PLIB_PMP_ExistsBusyStatus Identifies that the BusyStatus feature exists on the PMP
module.
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PLIB_PMP_ExistsByteEnablePolarity Identifies that the ByteEnablePolarity feature exists on
the PMP module.
PLIB_PMP_ExistsByteEnablePortControl Identifies that the ByteEnablePortControl feature exists
on the PMP module.
PLIB_PMP_ExistsChipSelectEnable Identifies that the ChipSelectEnable feature exists on
the PMP module.
PLIB_PMP_ExistsChipSelectoperation Identifies that the ChipSelectoperation feature exists on
the PMP module.
PLIB_PMP_ExistsChipXACKMode Identifies that the ChipXACKMode feature exists on the
PMP module.
PLIB_PMP_ExistsChipXACKPolarity Identifies that the ChipXACKPolarity feature exists on
the PMP module.
PLIB_PMP_ExistsChipXAltMasterWaitStates Identifies that the ChipXAltMasterWaitStates feature
exists on the PMP module.
PLIB_PMP_ExistsChipXBaseAddress Identifies that the ChipXBaseAddress feature exists on
the PMP module.
PLIB_PMP_ExistsChipXByteEnablePolarity Identifies that the ChipXByteEnablePolarity feature
exists on the PMP module.
PLIB_PMP_ExistsChipXDataHoldWaitStates Identifies that the ChipXDataHoldWaitStates feature
exists on the PMP module.
PLIB_PMP_ExistsChipXDataSetupWaitStates Identifies that the ChipXDataSetupWaitStates feature
exists on the PMP module.
PLIB_PMP_ExistsChipXDataSize Identifies that the ChipXDataSize feature exists on the
PMP module.
PLIB_PMP_ExistsChipXEnableStorbeSelect Identifies that the ChipXEnableStorbeSelect feature
exists on the PMP module.
PLIB_PMP_ExistsChipXPolarity Identifies that the ChipXPolarity feature exists on the
PMP module.
PLIB_PMP_ExistsChipXReadWritePolarity Identifies that the ChipXReadWritePolarity feature exists
on the PMP module.
PLIB_PMP_ExistsChipXStrobeWaitStates Identifies that the ChipXStrobeWaitStates feature exists
on the PMP module.
PLIB_PMP_ExistsChipXWriteEnablePolarity Identifies that the ChipXWriteEnablePolarity feature
exists on the PMP module.
PLIB_PMP_ExistsCSXActiveStatus Identifies that the CSXActiveStatus feature exists on the
PMP module.
PLIB_PMP_ExistsCSXPortControl Identifies that the CSXPortControl feature exists on the
PMP module.
PLIB_PMP_ExistsCurrentMaster Identifies that the CurrentMaster feature exists on the
PMP module.
PLIB_PMP_ExistsDataHoldWaitStates Identifies that the DataHoldWaitStates feature exists on
the PMP module.
PLIB_PMP_ExistsDataSetUpWaitStates Identifies that the DataSetUpWaitStates feature exists
on the PMP module.
PLIB_PMP_ExistsDataStrobeWaitStates Identifies that the DataStrobeWaitStates feature exists
on the PMP module.
PLIB_PMP_ExistsDataTransferSize Identifies that the DataTransferSize feature exists on the
PMP module.
PLIB_PMP_ExistsEnableControl Identifies that the EnableControl feature exists on the
PMP module.
PLIB_PMP_ExistsEnhancedMasterMode Identifies that the EnhancedMasterMode feature exists
on the PMP module.
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PLIB_PMP_ExistsIncrementMode Identifies that the IncrementMode feature exists on the
PMP module.
PLIB_PMP_ExistsInputBufferFull Identifies that the InputBufferFull feature exists on the
PMP module.
PLIB_PMP_ExistsInputBufferXStatus Identifies that the InputBufferXStatus feature exists on
the PMP module.
PLIB_PMP_ExistsInterruptMode Identifies that the InterruptMode feature exists on the
PMP module.
PLIB_PMP_ExistsMasterRXTX Identifies that the MasterRXTX feature exists on the
PMP module.
PLIB_PMP_ExistsMUXModeSelect Identifies that the MUXModeSelect feature exists on the
PMP module.
PLIB_PMP_ExistsOperationMode Identifies that the OperationMode feature exists on the
PMP module.
PLIB_PMP_ExistsOutPutBufferEmpty Identifies that the OutPutBufferEmpty feature exists on
the PMP module.
PLIB_PMP_ExistsOutputBufferXStatus Identifies that the OutputBufferXStatus feature exists on
the PMP module.
PLIB_PMP_ExistsReadWritePolarity Identifies that the ReadWritePolarity feature exists on
the PMP module.
PLIB_PMP_ExistsReadWriteStrobePortControl Identifies that the ReadWriteStrobePortControl feature
exists on the PMP module.
PLIB_PMP_ExistsReservedAddrSpace Identifies that the ReservedAddrSpace feature exists on
the PMP module.
PLIB_PMP_ExistsSlaveRX Identifies that the SlaveRX feature exists on the PMP
module.
PLIB_PMP_ExistsSlaveTX Identifies that the SlaveTX feature exists on the PMP
module.
PLIB_PMP_ExistsSmartAddress Identifies that the SmartAddress feature exists on the
PMP module.
PLIB_PMP_ExistsStopInIdleControl Identifies that the StopInIdleControl feature exists on the
PMP module.
PLIB_PMP_ExistsTransactionError Identifies that the TransactionError feature exists on the
PMP module.
PLIB_PMP_ExistsTransactionTimeOut Identifies that the TransactionTimeOut feature exists on
the PMP module.
PLIB_PMP_ExistsWaitStatesAddrHoldStrobe Identifies that the WaitStatesAddrHoldStrobe feature
exists on the PMP module.
PLIB_PMP_ExistsWaitStatesAddrLatchStrobe Identifies that the WaitStatesAddrLatchStrobe feature
exists on the PMP module.
PLIB_PMP_ExistsWriteEnablePolarity Identifies that the WriteEnablePolarity feature exists on
the PMP module.
PLIB_PMP_ExistsWriteEnablePortControl Identifies that the WriteEnablePortControl feature exists
on the PMP module.
PLIB_PMP_InputBuffersAreFull Gets the state of the input buffers.
PLIB_PMP_InputBufferTypeSelect Selects the input buffer based on the input passed.
PLIB_PMP_InputBufferXByteReceive Data to be received in Byte mode.
PLIB_PMP_InputBufferXIsFull Gets the state of the identified input buffer.
PLIB_PMP_InputOverflowClear Clears a PMP Overflow error.
PLIB_PMP_InputOverflowHasOccurred Identifies if there was a receiver overflow error.
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PLIB_PMP_InterruptModeGet Gets the current configured interrupt mode being used
with the PMP module.
PLIB_PMP_InterruptModeSelect Configures the interrupt request mode being used with
the PMP module.
PLIB_PMP_IsDataReceived Checks and returns if the data has been received in the
specified buffer in Slave mode.
PLIB_PMP_IsDataTransmitted Checks and returns if the data has been transmitted
from the specified buffer in Slave mode.
PLIB_PMP_IsEnabled Checks whether or not the PMP module is enabled.
PLIB_PMP_MasterReceive Receives the data in the master mode.
PLIB_PMP_MasterSend Sends the specified data in Master mode.
PLIB_PMP_MultiplexModeGet Gets the current multiplexing mode configured between
the address and data of the PMP module.
PLIB_PMP_MultiplexModeSelect Configures the multiplexing between the address and
data of the PMP module.
PLIB_PMP_OperationModeGet Gets the current operation mode of the PMP module.
PLIB_PMP_OperationModeSelect Configures the operation mode of the PMP module.
PLIB_PMP_OutputBuffersAreEmpty Gets the state of the output buffers.
PLIB_PMP_OutputBufferXByteSend Data to be transmitted in Byte mode.
PLIB_PMP_OutputBufferXIsEmpty Gets the state of the input buffer.
PLIB_PMP_OutputUnderflowClear Clears a PMP output underflow error.
PLIB_PMP_OutputUnderflowHasOccurred Identifies if there was an output buffer sent out with no
data.
PLIB_PMP_PortIsBusy Identifies if the (Master mode) PMP port is busy.
PLIB_PMP_ReadWriteStrobePolaritySelect Sets the polarity of the read strobe.
PLIB_PMP_ReadWriteStrobePortDisable Disables the PMP module read strobe port.
PLIB_PMP_ReadWriteStrobePortEnable Enables the PMP module read strobe port.
PLIB_PMP_ReservedAddressSpaceBitsSet Sets the address bits of the reserved address space of
the EPMP. The end address of the Chip Select-2 (if
present).
PLIB_PMP_SlaveReceive Receives the data in Slave mode.
PLIB_PMP_SlaveSend Sends the specified data in Slave mode.
PLIB_PMP_SmartAddressStrobeDisable Disables "smart" address strobes.
PLIB_PMP_SmartAddressStrobeEnable Enables "smart" address strobes.
PLIB_PMP_StopInIdleDisable Enables the PMP module to continue operation in Idle
mode.
PLIB_PMP_StopInIdleEnable Discontinues PMP module operation when the device
enters Idle mode.
PLIB_PMP_TransactionErrorClear Clears the transaction error flag.
PLIB_PMP_TransactionErrorHasOccurred Returns the status of a transaction error.
PLIB_PMP_TransactionHasTimedOut Returns the time-out status.
PLIB_PMP_TransactionTimeoutClear Clears the time-out flag.
PLIB_PMP_WaitStatesAddressHoldStrobeSelect Configures the address wait states needed to be used
with the PMP module.
PLIB_PMP_WaitStatesAddressLatchStrobeSelect Configures the address wait states needed to be used
with the PMP module.
PLIB_PMP_WaitStatesDataHoldSelect Configures the data hold states (after data transfer)
needed to be used with the PMP module.
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PLIB_PMP_WaitStatesDataSetUpSelect Configures the data wait states (before the data
transfer) needed to be used with the PMP module.
PLIB_PMP_WaitStatesStrobeSelect Configures the strobe wait states (during the data
transfer) needed to be used with the PMP module.
PLIB_PMP_WriteEnableStrobePolaritySelect Sets the polarity of the write enable strobe.
PLIB_PMP_WriteEnableStrobePortDisable Disables the PMP module write strobe port.
PLIB_PMP_WriteEnableStrobePortEnable Enables the PMP module write strobe port.
File Name
plib_pmp.h
Company
Microchip Technology Inc.
5.6.17 Ports Peripheral Library
5.6.17.1 Introduction
This library provides a low-level abstraction of the I/O Ports module on the Microchip family of microcontrollers with a convenient
C language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with
the module's registers, thereby hiding differences from one microcontroller variant to another.
Description
Ports Peripheral Library
for
Microchip Microcontrollers
I/O Ports Overview
The general purpose I/O pins can be considered the simplest of peripherals. These I/O pins allow the microcontroller to monitor
and control other devices. To add flexibility and functionality to a device, some pins are multiplexed with alternate function(s).
These functions depend on which peripheral features are on the device. In general, when a peripheral is functioning, that pin
may not be used as a general purpose I/O pin.
A major challenge in general purpose devices is providing the largest possible set of peripheral features while minimizing the
conflict of features on I/O pins. The Peripheral Pin Select (PPS) feature simplifies this challenge by enabling the user’s peripheral
set selection and their placement on a wide range of I/O pins. By increasing the pin out options available on a particular device,
users can better tailor the microcontroller to their entire application.The PPS feature operates over a fixed subset of digital I/O
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pins. Users may independently map the input and/or output of any one of many digital peripherals to any one of these I/O pins.
PPS is performed in software and generally does not require the device to be reprogrammed. Hardware safeguards are included
that prevent accidental or spurious changes to the peripheral mapping once it has been established.
Note: Peripheral Pin Select is not available on all devices. Please refer to the specific device data sheet to determine availability
of this feature.
Following are some of the key features of the I/O Ports module:
• Individual output pin/port open-drain control
• Individual input pin/port pull-up/down control
• Monitor select inputs and generate interrupt on mismatch condition (Change Notification)
• Operation during CPU Sleep and Idle modes
• Port line analog/digital selection
• Port slew rate control
• PPS peripheral function remapping
5.6.17.2 Release Notes
MPLAB Harmony Version: v0.70b Ports Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
None to report at this time.
5.6.17.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED AS IS MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.6.17.4 Using the Library
This topic describes the basic architecture of the Ports Peripheral Library and provides information and examples on how to use
it.
Description
Interface Header File: plib_ports.h
The interface to the Ports Peripheral Library is defined in the "plib_ports.h" header file, which is included by the "peripheral.h"
peripheral library header file. Any C language source (.c) file that uses the Ports Peripheral Library must include "peripheral.h".
Library File:
The Ports Peripheral Library is part of the processor-specific peripheral library installed with the compiler. This library is
automatically available (in the default search path) for any project built using the Microchip compilers.
5.6.17.4.1 Hardware Abstraction Model
This topic provides detailed information for general purpose I/O and pin mapping.
Description
General Purpose I/O
All port pins have three controls directly associated with their operation as digital I/O. The data direction control determines
whether the pin is an input or an output. All port pins are defined as inputs after a Reset. Writes to a port are latched and, if
programmed as an output, driven by a buffer to the pin. The value of pin can be read directly from an input buffer, (after it has
been synchronized to the clock), regardless of whether the pin direction has been selected as input or output. Additionally, the
value being driven by the latch before the output buffer, can also be read.
Internal pull-up resistors are available on selected port pins to eliminate the need to use external pull-up resistors. These pull-ups
can be controlled by this library. The open-drain feature allows the generation of outputs higher than VDD on any desired
digital-only pins by using external pull-up resistors.
Note: For detailed specifications on the maximum allowed open-drain voltage, refer to the "Electrical Characteristics" chapter
in the specific device data sheet.
The input change notification feature of the I/O ports allows the microcontrollers to generate interrupt requests to the processor
in response to a change of state on selected input pins. This feature is capable of detecting input change of states even in Sleep
mode, when the clocks are disabled.
The alternate pin function selections are used to steer specific peripheral input and output functions between different pins.
The output slew rate of some port pins are programmable to select either the standard transition rate or a reduced transition rate
of 'x' times the standard to minimize EMI.
Peripheral Pin Select
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In addition to general purpose IO control, this library also provides a low-level abstraction of the PPS module on Microchip
microcontrollers with a convenient C language interface.
Available Pins
The number of available pins is dependent on the particular device and its pin count. Pins that support the PPS feature include
the designation 'RPn' or 'RPIn' in their full pin designation, where 'RP' designates a remappable peripheral and 'n' is the
remappable pin number. RP is used to designate pins that support both remappable input and output functions, while RPI
indicates pins that only support remappable input functions.
Available Peripherals
The peripherals managed by PPS are all digital-only peripherals. These include general serial communications (UART and SPI),
general purpose timer clock inputs, timer-related peripherals (Input Capture and Output Compare), comparator digital output,
interrupt-on-change inputs, etc.
In comparison, some digital-only peripheral modules are never included in the peripheral pin select feature. This is because the
peripheral’s function requires special I/O circuitry on a specific port and cannot be easily connected to multiple pins. These
modules include I2C, among others. A similar requirement excludes all modules with analog inputs, such as the Analog-to-Digital
Converter (ADC).
If multiple peripherals are enabled on the same pin(s), there is an internal priority that decides which function is mapped to the
pin. When a remappable peripheral is active on a given I/O pin, it takes priority over all other digital I/O and digital
communication peripherals associated with the pin. Priority is given regardless of the type of peripheral that is mapped.
Remappable peripherals never take priority over any analog functions associated with the pin. In other words, If an analog
function is enabled on the pin, the PPS input will be disabled.
Input Mapping
The inputs of the peripheral pin select options are mapped on the basis of the peripheral.
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Output Mapping
In contrast to inputs, the outputs of the peripheral pin select options are mapped on the basis of the pin. In this case, a control
associated with a particular pin dictates the peripheral output to be mapped.
Mapping Limitations
The control schema of the peripheral select pins is not limited to a small range of fixed peripheral configurations. There are no
mutual-exclusion or hardware-enforced lockouts between any of the peripheral mapping SFRs. Literally any combination of
peripheral mappings across any or all of the RPn pins is possible. This includes both many-to-one and one-to-many mappings of
peripheral inputs and outputs to pins. While such mappings may be technically possible from a configuration point of view, they
may not be supportable from an electrical point of view and may cause damage to the part.
Note 1: For detailed specifications on the mapping limitations, refer to the "I/O Ports" chapter in the specific device data sheet.
Note 2: Regrading pin priorities, the priority of the pins are assigned from left to right, left being the highest priority and the right
most being the least priority.
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5.6.17.4.2 Library Overview
The Ports Peripheral Library supports the following set of interface routines:
Library Interface Section Description
Port Functions Port access read/write/toggle/clear interfaces with 8-/16-/32-bit
widths based on the selected device.
Port Pin Functions Port bit/pin read/write/toggle/clear interfaces.
Change Notification Functions Port change notification.
Peripheral Pin Select Functions Interface routines for mapping the digital input/output to a
specific the PPS remappable input/output pin.
5.6.17.4.3 How the Library Works
How the Library Works
The following topics discuss the processes involved while using a Ports module:
• Ports Control
• Ports Function Remap
• Ports Change Notification
• Special Considerations
5.6.17.4.3.1 Ports Control
Port Functions Usage:
• Port Read - Ports can be read at byte/word level using PLIB_PORTS_Read, and at the bit/pin level using
PLIB_PORTS_PinGet
• Port Write - Ports can be written to at byte/word level using PLIB_PORTS_Write and at the bit/pin level using
PLIB_PORTS_PinWrite. The function PLIB_PORTS_PinSet can be used to set a specific bit/pin of a port. A mask-based
PORTx write can be accomplished using the function PLIB_PORTS_Set with the appropriate mask as a parameter along with
the value.
• Port Clear - Ports can be cleared at byte/word level using PLIB_PORTS_Clear with appropriate mask as a parameter and at
the bit/pin level using PLIB_PORTS_PinClear
• Port Direction - The ports read direction can be set at byte/word level using PLIB_PORTS_DirectionInputSet and at the bit/pin
level using PLIB_PORTS_PinDirectionInputSet. Similarly, the ports write direction can be set at the byte/word level using
PLIB_PORTS_DirectionOutputSet and at the bit/pin level using PLIB_PORTS_PinDirectionOutputSet. The direction
information can be read using PLIB_PORTS_DirectionGet.
• Port Toggle - Ports can be toggled at the byte/word level using PLIB_PORTS_Toggle with the appropriate mask as a
parameter and at the bit/pin level using PLIB_PORTS_PinToggle
• Port Open Drain - Ports can be enabled for open-drain functionality at the byte/word level using the interface
PLIB_PORTS_OpenDrainEnable and at the bit/pin level using PLIB_PORTS_PinOpenDrainEnable. Similarly, the ports can
be disabled for open-drain functionality at the byte/word level using PLIB_PORTS_OpenDrainDisable and at the bit/pin level
using PLIB_PORTS_PinOpenDrainDisable.
• Port Pull-up - Ports can be enabled for pull-up functionality at the byte/word level using PLIB_PORTS_PullUpEnable and at
the bit/pin level using PLIB_PORTS_PinPullUpEnable. Similarly, the ports can be disabled for pull-up functionality at the
byte/word level using the interface PLIB_PORTS_PullUpDisable and at the bit/pin level using
PLIB_PORTS_PinPullUpDisable.
Example:
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// PORT Direction setting for output
PLIB_PORTS_DirectionOutputSet(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0xFFFF);
// Writing a value into a PORT
PLID_PORTS_Write(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_TYPE)0x1234);
// PORT Direction setting for input
PLIB_PORTS_DirectionInputSet(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0xFFFF);
// Reading back the previously written value
PORTS_DATA_TYPE readData = PLIB_PORTS_Read(MY_PORTS_INSTANCE, MY_CHANNEL);
// Clearing the PORT
PLIB_PORTS_Clear(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF);
// Writing the value based on the mask, only 0x34 gets written to the PORT
PLIB_PORTS_Set(MY_PORTS_INSTANCE, MY_CHANNEL, 0x1234, (PORTS_DATA_MASK)0x00FF);
// Toggling a PORT
PLIB_PORTS_Toggle(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF);
Note: In certain devices, disabling pull-ups will enable the pull-down feature and vice-versa. For more information, refer to the
"I/O Ports" chapter in the specific device data sheet or the related family reference manual section.
5.6.17.4.3.2 Ports Function Remap
Using the PPS Feature:
1. Ensure that any fixed digital peripherals on the pins to be used are disabled.
2. Ensure that pins with analog functionality are set to Digital mode.
3. Check if the Input/Output lock is active using PLIB_PORTS_IOLockIsActive.
4. Enable writing to the Input/Output control register using PLIB_PORTS_IOLockDisable.
5. Remap the input and/or output pins using the internal PPS module. This can be achieved with the function
PLIB_PORTS_RemapInputOutput with the respective parameters defined in the processor specific headers.
6. Lock the Input/Output control register using PLIB_PORTS_IOLockEnable.
7. Configure and enable newly mapped PPS peripherals.
Example:
// Remapping input function 'Input Capture 1' to the Remappable input pin 'RPI1'
PLIB_PORTS_RemapInputOutput(MY_PORTS_INSTANCE, PORTS_REMAP_FUNCTION_IC1, PORTS_REMAP_PIN_RPI1);
// Remapping output function 'UART1 Transmit' to the Remappable output pin 'RP3'
PLIB_PORTS_RemapInputOutput(MY_PORTS_INSTANCE, PORTS_REMAP_FUNCTION_U1TX, PORTS_REMAP_PIN_RP3);
Note: For more information, refer to the "I/O Ports" chapter in the specific device data sheet or the related family reference
manual section.
5.6.17.4.3.3 Ports Change Notification
Change Notification Feature Usage
1. Ensure that the change notify pin is configured as a digital input by setting the associated bit in the direction register using the
PLIB_PORTS_PinDirectionInputSet or PLIB_PORTS_DirectionInputSet functions.
2. Select the desired change notification pin using PLIB_PORTS_PinChangeNoticeEnable.
3. Turn on the weak pull-up devices (if desired) for the selected change notification pins using
PLIB_PORTS_ChangeNoticePullUpEnable (weak pull-ups can be disabled using PLIB_PORTS_ChangeNoticePullUpDisable).
4. Clear the selected change notification interrupt flag.
5. Select the desired interrupt priority for change notification pin.
6. Enable change notification interrupts.
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7. Change notification can be disabled after the successful usage using PLIB_PORTS_PinChangeNoticeDisable. Certain
microcontrollers support the global control over the change notification feature using the following functions:
PLIB_PORTS_ChangeNoticeEnable and PLIB_PORTS_ChangeNoticeDisable. If there are any requirements to control the
pull-downs, the following two functions could be used: PLIB_PORTS_ChangeNoticePullDownEnable and
PLIB_PORTS_ChangeNoticePullDownDisable.
Change Notification Operation in Sleep and Idle Modes
The change notification feature continues to operate during Sleep or Idle mode. Its operation can be enabled or disabled using
PLIB_PORTS_ChangeNoticeInIdleEnable or PLIB_PORTS_ChangeNoticeInIdleDisable. If one of the enabled change
notification pins changes states, the respective status bit will be set, which can be monitored using
PLIB_PORTS_ChangeNoticeHasOccured.
Example:
// Enabling the global change notification
PLIB_PORTS_ChangeNoticeEnable(MY_PORTS_INSTANCE);
// Enabling weak pull-ups for the change notification PIN 10
PLIB_PORTS_ChangeNoticePullUpEnable(MY_PORTS_INSTANCE, PORTS_CHANGE_NOTICE_PIN_10);
// Enabling change notification on PIN 10
PLIB_PORTS_GLobalChangeNoticeEnable(MY_PORTS_INSTANCE, PORTS_CHANGE_NOTICE_PIN_10);
Note: For more information, refer to the "I/O Ports" chapter in the specific device data sheet or the related family reference
manual section.
5.6.17.4.3.4 Special Considerations
Considerations on Ports Usage
When reading a port register, all pins configured as analog input channels will read as cleared.
Pins configured as digital inputs will not operate correctly with analog peripherals. Analog levels on any pin that is defined as a
digital input may cause the input buffer of analog peripherals to consume current that exceeds the device specifications.
Pull-ups and pull-downs on change notification pins should always be disabled when the port pin is configured as a digital output.
One instruction cycle is required between a port direction change or port write operation and a read operation of the same port.
Typically, this instruction would be a NOP.
Considerations for PPS
The ability to control PPS options introduces several considerations into application design that could be overlooked. This is
particularly true for several common peripherals that are available only as remappable peripherals.
The main consideration is that the peripheral pin selects are not available on default pins in the device’s default (i.e., Reset)
state, all PPS inputs are tied to VSS and all PPS outputs are disconnected. This condition requires the user to initialize the
device with the proper peripheral configuration before any other application code is executed. For application safety, however, it
is best to lock the configuration after writing to the PPS control.
The assignment of a peripheral signal to a particular pin does not automatically perform any other configuration of the pin’s I/O
circuitry. In theory, this means adding a pin-selectable output to a pin may mean inadvertently driving an existing peripheral input
when the output is driven. Users must be familiar with the behavior of other fixed peripherals that share a remappable pin and
know when to enable or disable them. To be safe, fixed digital peripherals that share the same pin should be disabled when not
in use. In addition, configuring a remappable pin for a specific peripheral does not automatically turn on that feature. The
peripheral must be specifically configured for operation and enabled, as if it were tied to a fixed pin. Where this occurs in the
application code (immediately following a device Reset and peripheral configuration or inside the main application routine)
depends on the peripheral and its use in the application.
A final consideration is that PPS functions neither override analog inputs, nor reconfigure pins with analog functions for digital
I/O. If a pin is configured as an analog input on a device Reset, it must be explicitly reconfigured as a digital I/O when used with
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PPS.
Note: For more information, refer to the "I/O Ports" chapter in the specific device data sheet or the related family reference
manual section.
5.6.17.5 Configuring the Library
The library is configured for the supported Ports module when the supported processor is chosen in the MPLAB IDE.
5.6.17.6 Library Interface
Data Types and Constants
Name Description
PORTS_ANALOG_PIN Data type defining the different Analog input pins
PORTS_BIT_POS Lists the constants whic holds different bit positions of PORTS.
PORTS_CHANGE_NOTICE_PIN Data type defining the different Change Notification Pins enumeration
PORTS_CHANNEL Identifies the PORT Channels Supported.
PORTS_DATA_MASK Data type defining the PORTS data mask
PORTS_DATA_TYPE Data type defining the PORTS data type.
PORTS_MODULE_ID Identifies the PORT Modules Supported.
PORTS_PERIPHERAL_OD Data type defining the different Peripherals available for Open drain
Configuration
PORTS_PIN Data type defining the different PORTS IO Pins enumeration
PORTS_PIN_MODE Identifies the ports pin mode
PORTS_REMAP_FUNCTION Data type defining the different remap function enumeration
PORTS_REMAP_INPUT_FUNCTION Data type defining the different remap input function enumeration.
PORTS_REMAP_INPUT_PIN Data type defining the different Ports I/O input pins enumeration.
PORTS_REMAP_OUTPUT_FUNCTION Data type defining the different remap output function enumeration.
PORTS_REMAP_OUTPUT_PIN Data type defining the different Ports I/O output pins enumeration.
PORTS_REMAP_PIN Data type defining the different remappable input/output enumeration
Change Notification Functions
Name Description
PLIB_PORTS_ChangeNoticeDisable Global Change Notice disable.
PLIB_PORTS_ChangeNoticeEnable Global Change Notice enable.
PLIB_PORTS_ChangeNoticeInIdleDisable CPU Idle does not affect Change Notice operation.
PLIB_PORTS_ChangeNoticeInIdleEnable CPU Idle mode halts Change Notice operation.
PLIB_PORTS_ChangeNoticeInIdlePerPortDisable Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticeInIdlePerPortEnable Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePerPortHasOccured Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePerPortTurnOff Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePerPortTurnOn Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePullDownPerPortDisable Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePullDownPerPortEnable Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePullUpDisable Disable pull-up on input change.
PLIB_PORTS_ChangeNoticePullUpEnable Enable pull-up on input change.
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PLIB_PORTS_ChangeNoticePullUpPerPortDisable Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePullUpPerPortEnable Enables the selected pin as analog or digital.
PLIB_PORTS_PinChangeNoticeDisable Port pin Change Notice disable.
PLIB_PORTS_PinChangeNoticeEnable Port pin Change Notice enable.
PLIB_PORTS_PinChangeNoticePerPortDisable Enables the selected pin as analog or digital.
PLIB_PORTS_PinChangeNoticePerPortEnable Enables the selected pin as analog or digital.
Feature Existence Functions
Name Description
PLIB_PORTS_ExistsChangeNotice Identifies whether the ChangeNotice feature exists on the
PORTS module
PLIB_PORTS_ExistsChangeNoticeInIdle Identifies whether the ChangeNoticeInIdle feature exists on
the PORTS module
PLIB_PORTS_ExistsChangeNoticePerPortInIdle Identifies whether the ChangeNoticeInIdlePerPort feature
exists on the PORTS module
PLIB_PORTS_ExistsChangeNoticePerPortStatus Identifies whether the ChangeNoticePerPortStatus feature
exists on the PORTS module
PLIB_PORTS_ExistsChangeNoticePerPortTurnOn Identifies whether the ChangeNoticePerPortTurnOn feature
exists on the PORTS module
PLIB_PORTS_ExistsChangeNoticePullDownPerPort Identifies whether the ChangeNoticePullDownPerPort
feature exists on the PORTS module
PLIB_PORTS_ExistsChangeNoticePullUp Identifies whether the ChangeNoticePullup feature exists on
the PORTS module
PLIB_PORTS_ExistsChangeNoticePullUpPerPort Identifies whether the ChangeNoticePullUpPerPort feature
exists on the PORTS module
PLIB_PORTS_ExistsPinChangeNotice Identifies whether the PinChangeNotice feature exists on the
PORTS module
PLIB_PORTS_ExistsPinChangeNoticePerPort Identifies whether the PinChangeNoticePerPort feature
exists on the PORTS module
PLIB_PORTS_ExistsPinMode Identifies whether the PinMode feature exists on the PORTS
module
PLIB_PORTS_ExistsPinModePerPort Identifies whether the PinModePerPort feature exists on the
PORTS module
PLIB_PORTS_ExistsPortsDirection Identifies whether the PortsDirection feature exists on the
PORTS module
PLIB_PORTS_ExistsPortsOpenDrain Identifies whether the PortsOpenDrain feature exists on the
PORTS module
PLIB_PORTS_ExistsPortsRead Identifies whether the PortsRead feature exists on the
PORTS module
PLIB_PORTS_ExistsPortsWrite Identifies whether the PortsWrite feature exists on the
PORTS module
PLIB_PORTS_ExistsRemapInput Identifies whether the RemapInput feature exists on the
PORTS module
PLIB_PORTS_ExistsRemapOutput Identifies whether the RemapOutput feature exists on the
PORTS module
Peripheral Pin Select Functions
Name Description
PLIB_PORTS_RemapInput Input/Output (I/O) function remapping.
PLIB_PORTS_RemapOutput Input/Output (I/O) function remapping.
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Port Functions
Name Description
PLIB_PORTS_Clear Clears the selected digital port/latch.
PLIB_PORTS_DirectionGet Reads the direction of the selected digital port.
PLIB_PORTS_DirectionInputSet Enables the read (input) direction for the selected port.
PLIB_PORTS_DirectionOutputSet Enables the write (output) direction for the selected port.
PLIB_PORTS_PinOpenDrainDisable Disables the open drain functionality for the selected pin.
PLIB_PORTS_PinOpenDrainEnable Enables the open drain functionality for the selected pin.
PLIB_PORTS_Read Reads the selected digital port.
PLIB_PORTS_Set Writes the selected digital port/latch based on the mask.
PLIB_PORTS_Toggle Toggles the selected digital port/latch.
PLIB_PORTS_Write Writes the selected digital port/latch.
PLIB_PORTS_OpenDrainDisable Disables the open drain functionality for the selected port.
PLIB_PORTS_OpenDrainEnable Enables the open drain functionality for the selected port.
Port Pin Functions
Name Description
PLIB_PORTS_PinClear Clears the selected digital pin/latch.
PLIB_PORTS_PinDirectionInputSet Enables the read (input) direction for the selected pin.
PLIB_PORTS_PinDirectionOutputSet Enables the write (output) direction for the selected pin.
PLIB_PORTS_PinGet Reads/Gets data from the selected digital pin.
PLIB_PORTS_PinModeSelect Enables the selected pin as analog or digital.
PLIB_PORTS_PinSet Sets the selected digital pin/latch.
PLIB_PORTS_PinToggle Toggles the selected digital pin/latch.
PLIB_PORTS_PinWrite Writes the selected digital pin/latch.
PLIB_PORTS_PinModePerPortSelect Enables the selected pin as analog or digital.
Description
This section lists the interface routines, data types, constants, and macros required for the Ports Peripheral Library.
5.6.17.6.1 Port Pin Functions
5.6.17.6.1.1 PLIB_PORTS_PinClear Function
C
void PLIB_PORTS_PinClear(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function clears the selected digital pin/latch.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsWrite in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_PIN_10
PLIB_PORTS_PinClear(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
5.6.17.6.1.2 PLIB_PORTS_PinDirectionInputSet Function
C
void PLIB_PORTS_PinDirectionInputSet(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the read (input) direction for the selected pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsDirection in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_PIN_10
PLIB_PORTS_PinDirectionInputSet(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
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5.6.17.6.1.3 PLIB_PORTS_PinDirectionOutputSet Function
C
void PLIB_PORTS_PinDirectionOutputSet(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the write (output) direction for the selected pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsDirection in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_PIN_10
PLIB_PORTS_PinDirectionOutputSet(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
5.6.17.6.1.4 PLIB_PORTS_PinGet Function
C
bool PLIB_PORTS_PinGet(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function reads/gets data from the selected digital pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
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Returns
Port pin read data.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsRead in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_PIN_10
bool bitStatus = PLIB_PORTS_PinGet(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
5.6.17.6.1.5 PLIB_PORTS_PinModeSelect Function
C
void PLIB_PORTS_PinModeSelect(
PORTS_MODULE_ID index,
PORTS_ANALOG_PIN pin,
PORTS_PIN_MODE mode
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pin Possible values of PORTS_ANALOG_PIN
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.1.6 PLIB_PORTS_PinSet Function
C
void PLIB_PORTS_PinSet(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
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Description
This function sets the selected digital pin/latch.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsWrite in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_PIN_10
PLIB_PORTS_PinSet(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
5.6.17.6.1.7 PLIB_PORTS_PinToggle Function
C
void PLIB_PORTS_PinToggle(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function toggles the selected digital pin/latch.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsWrite in your application to determine whether this feature is available.
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Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_PIN_10
PLIB_PORTS_PinToggle(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
5.6.17.6.1.8 PLIB_PORTS_PinWrite Function
C
void PLIB_PORTS_PinWrite(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos,
bool value
);
Description
This function writes to the selected digital pin/latch.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
value Value to be written to the specific pin/latch
true sets the bit, false - clears the bit
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsWrite in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_PIN_10
PLIB_PORTS_PinWrite(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
5.6.17.6.1.9 PLIB_PORTS_PinModePerPortSelect Function
C
void PLIB_PORTS_PinModePerPortSelect(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos,
PORTS_PIN_MODE mode
);
Description
This function enables the selected pin as analog or digital.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.2 Port Functions
5.6.17.6.2.1 PLIB_PORTS_Clear Function
C
void PLIB_PORTS_Clear(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK clearMask
);
Description
This function clears the selected digital port/latch.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
clearMask Identifies the bits to be cleared
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsWrite in your application to determine whether this feature is available.
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Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PORTS_DATA_MASK clearMask = (PORTS_DATA_MASK)0x00FF;
PLIB_PORTS_Clear(MY_PORTS_INSTANCE, MY_CHANNEL, clearMask);
5.6.17.6.2.2 PLIB_PORTS_DirectionGet Function
C
PORTS_DATA_MASK PLIB_PORTS_DirectionGet(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel
);
Description
This function reads the direction of the selected digital port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
Returns
Direction of the selected port of type PORTS_DATA_MASK
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsDirection in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PORTS_DATA_MASK readDir = PLIB_PORTS_DirectionGet(MY_PORTS_INSTANCE, MY_CHANNEL);
5.6.17.6.2.3 PLIB_PORTS_DirectionInputSet Function
C
void PLIB_PORTS_DirectionInputSet(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK mask
);
Description
This function enables the read (input) direction for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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channel Identifier for the PORTS channel A, B, C, etc.
mask mask for the direction of width PORTS_DATA_MASK
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsDirection in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PLIB_PORTS_DirectionInputSet(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF);
5.6.17.6.2.4 PLIB_PORTS_DirectionOutputSet Function
C
void PLIB_PORTS_DirectionOutputSet(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK mask
);
Description
This function enables the write (output) direction for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
mask mask for the direction of width PORTS_DATA_MASK
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsDirection in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PLIB_PORTS_DirectionOutputSet(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF);
5.6.17.6.2.5 PLIB_PORTS_PinOpenDrainDisable Function
C
void PLIB_PORTS_PinOpenDrainDisable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
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Description
This function disables the open drain functionality for the selected pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsOpenDrain in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_PIN_10
PLIB_PORTS_PinOpenDrainDisable(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
5.6.17.6.2.6 PLIB_PORTS_PinOpenDrainEnable Function
C
void PLIB_PORTS_PinOpenDrainEnable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the open drain functionality for the selected pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsOpenDrain in your application to determine whether this feature is available.
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Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_PIN_10
PLIB_PORTS_PinOpenDrainEnable(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
5.6.17.6.2.7 PLIB_PORTS_Read Function
C
PORTS_DATA_TYPE PLIB_PORTS_Read(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel
);
Description
This function reads from the selected digital port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
Returns
data on a port with width PORTS_DATA_TYPE
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsRead in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PORTS_DATA_TYPE readData = PLIB_PORTS_Read(MY_PORTS_INSTANCE, MY_CHANNEL);
5.6.17.6.2.8 PLIB_PORTS_Set Function
C
void PLIB_PORTS_Set(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_TYPE value,
PORTS_DATA_MASK mask
);
Description
This function writes to the selected digital port/latch relative to the mask.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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channel Identifier for the PORTS channel A, B, C, etc.
value Value to be written into a port of width PORTS_DATA_TYPE
mask Identifies the bits to be written to
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsWrite in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_VALUE - 0x1234
PORTS_DATA_MASK myMask = (PORTS_DATA_MASK)0x00FF;
PLIB_PORTS_Set(MY_PORTS_INSTANCE, MY_CHANNEL, MY_VALUE, myMask);
5.6.17.6.2.9 PLIB_PORTS_Toggle Function
C
void PLIB_PORTS_Toggle(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK toggleMask
);
Description
This function toggles the selected digital port/latch.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
toggleMask Identifies the bits to be toggled
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsWrite in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PORTS_DATA_MASK toggleMask = (PORTS_DATA_MASK)0x00FF;
PLIB_PORTS_Toggle(MY_PORTS_INSTANCE, MY_CHANNEL, toggleMask);
5.6.17.6.2.10 PLIB_PORTS_Write Function
C
void PLIB_PORTS_Write(
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PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_TYPE value
);
Description
This function writes to the selected digital port/latch.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
value Value to be written into a port of width PORTS_DATA_TYPE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsWrite in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_VALUE - 0x1234
PLID_PORTS_Write(MY_PORTS_INSTANCE, MY_CHANNEL, MY_VALUE);
5.6.17.6.2.11 PLIB_PORTS_OpenDrainDisable Function
C
void PLIB_PORTS_OpenDrainDisable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK mask
);
Description
This function disables the open drain functionality for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
mask mask of type PORTS_DATA_MASK
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_PORTS_ExistsPortsOpenDrain in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PLIB_PORTS_OpenDrainDisable(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF);
5.6.17.6.2.12 PLIB_PORTS_OpenDrainEnable Function
C
void PLIB_PORTS_OpenDrainEnable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK mask
);
Description
This function enables the open drain functionality for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORTS channel A, B, C, etc.
mask mask of type PORTS_DATA_MASK
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPortsOpenDrain in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PLIB_PORTS_OpenDrainEnable(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF);
5.6.17.6.3 Peripheral Pin Select Functions
5.6.17.6.3.1 PLIB_PORTS_RemapInput Function
C
void PLIB_PORTS_RemapInput(
PORTS_MODULE_ID index,
PORTS_REMAP_INPUT_FUNCTION function,
PORTS_REMAP_INPUT_PIN remapPin
);
Description
This function controls the I/O function remapping.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsRemapInputOutput in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// Remapping input function 'Input Capture 1' to the Remappable pin 'RPD2'
PLIB_PORTS_RemapInput(MY_PORTS_INSTANCE, INPUT_FUNC_IC1, INPUT_PIN_RPD2 );
5.6.17.6.3.2 PLIB_PORTS_RemapOutput Function
C
void PLIB_PORTS_RemapOutput(
PORTS_MODULE_ID index,
PORTS_REMAP_OUTPUT_FUNCTION function,
PORTS_REMAP_OUTPUT_PIN remapPin
);
Description
This function controls the I/O function remapping.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsRemapInputOutput in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// Remapping output function 'UART3 Transmit' to the Remappable pin 'RPA14'
PLIB_PORTS_RemapInputOutput(MY_PORTS_INSTANCE, OTPUT_FUNC_U3TX, OUTPUT_PIN_RPA14);
5.6.17.6.4 Change Notification Functions
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5.6.17.6.4.1 PLIB_PORTS_ChangeNoticeDisable Function
C
void PLIB_PORTS_ChangeNoticeDisable(
PORTS_MODULE_ID index
);
Description
This function disables the global Change Notice feature.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsChangeNotice in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PLIB_PORTS_ChangeNoticeDisable(MY_PORTS_INSTANCE);
5.6.17.6.4.2 PLIB_PORTS_ChangeNoticeEnable Function
C
void PLIB_PORTS_ChangeNoticeEnable(
PORTS_MODULE_ID index
);
Description
This function enables the global Change Notice feature.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsChangeNotice in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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// application developer.
PLIB_PORTS_ChangeNoticeEnable(MY_PORTS_INSTANCE);
5.6.17.6.4.3 PLIB_PORTS_ChangeNoticeInIdleDisable Function
C
void PLIB_PORTS_ChangeNoticeInIdleDisable(
PORTS_MODULE_ID index
);
Description
This function allows change notice operation to continue upon CPU Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsChangeNoticeInIdle in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PLIB_PORTS_ChangeNoticeInIdleDisable(MY_PORTS_INSTANCE);
5.6.17.6.4.4 PLIB_PORTS_ChangeNoticeInIdleEnable Function
C
void PLIB_PORTS_ChangeNoticeInIdleEnable(
PORTS_MODULE_ID index
);
Description
This function halts Change Notice operation on CPU Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsChangeNoticeInIdle in your application to determine whether this feature is available.
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Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
PLIB_PORTS_ChangeNoticeInIdleEnable(MY_PORTS_INSTANCE);
5.6.17.6.4.5 PLIB_PORTS_ChangeNoticeInIdlePerPortDisable Function
C
void PLIB_PORTS_ChangeNoticeInIdlePerPortDisable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.4.6 PLIB_PORTS_ChangeNoticeInIdlePerPortEnable Function
C
void PLIB_PORTS_ChangeNoticeInIdlePerPortEnable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.4.7 PLIB_PORTS_ChangeNoticePerPortHasOccured Function
C
bool PLIB_PORTS_ChangeNoticePerPortHasOccured(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
5-2621
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.4.8 PLIB_PORTS_ChangeNoticePerPortTurnOff Function
C
void PLIB_PORTS_ChangeNoticePerPortTurnOff(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.4.9 PLIB_PORTS_ChangeNoticePerPortTurnOn Function
C
void PLIB_PORTS_ChangeNoticePerPortTurnOn(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
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bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.4.10 PLIB_PORTS_ChangeNoticePullDownPerPortDisable Function
C
void PLIB_PORTS_ChangeNoticePullDownPerPortDisable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
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5.6.17.6.4.11 PLIB_PORTS_ChangeNoticePullDownPerPortEnable Function
C
void PLIB_PORTS_ChangeNoticePullDownPerPortEnable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.4.12 PLIB_PORTS_ChangeNoticePullUpDisable Function
C
void PLIB_PORTS_ChangeNoticePullUpDisable(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum
);
Description
This function disables pull-up on input change.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsChangeNoticePullUp in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_CHANGE_NOTICE_PIN_10
PLIB_PORTS_ChangeNoticePullUpDisable(MY_PORTS_INSTANCE, MY_PINNUM);
5.6.17.6.4.13 PLIB_PORTS_ChangeNoticePullUpEnable Function
C
void PLIB_PORTS_ChangeNoticePullUpEnable(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum
);
Description
This function enables pull-up on input change.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsChangeNoticePullUp in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_CHANGE_NOTICE_PIN_10
PLIB_PORTS_ChangeNoticePullUpEnable(MY_PORTS_INSTANCE, MY_PINNUM);
5.6.17.6.4.14 PLIB_PORTS_ChangeNoticePullUpPerPortDisable Function
C
void PLIB_PORTS_ChangeNoticePullUpPerPortDisable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the selected pin as analog or digital.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.4.15 PLIB_PORTS_ChangeNoticePullUpPerPortEnable Function
C
void PLIB_PORTS_ChangeNoticePullUpPerPortEnable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.4.16 PLIB_PORTS_PinChangeNoticeDisable Function
C
void PLIB_PORTS_PinChangeNoticeDisable(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum
);
Description
This function disables the port pin Change Notice feature.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinChangeNotice in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_CHANGE_NOTICE_PIN_10
PLIB_PORTS_PinChangeNoticeDisable(MY_PORTS_INSTANCE, MY_PINNUM);
5.6.17.6.4.17 PLIB_PORTS_PinChangeNoticeEnable Function
C
void PLIB_PORTS_PinChangeNoticeEnable(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum
);
Description
This function enables the port pin Change Notice feature.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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5-2627
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinChangeNotice in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_CHANGE_NOTICE_PIN_10
PLIB_PORTS_PinChangeNoticeEnable(MY_PORTS_INSTANCE, MY_PINNUM);
5.6.17.6.4.18 PLIB_PORTS_PinChangeNoticePerPortDisable Function
C
void PLIB_PORTS_PinChangeNoticePerPortDisable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.4.19 PLIB_PORTS_PinChangeNoticePerPortEnable Function
C
void PLIB_PORTS_PinChangeNoticePerPortEnable(
PORTS_MODULE_ID index,
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PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Port pin channel
bitPos Position in the PORT pins
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_PORTS_ExistsPinMode in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PIN - PORTS_ANALOG_PIN_0
// MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
PLIB_PORTS_PinModeSelect(MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE);
5.6.17.6.5 Data Types and Constants
5.6.17.6.5.1 PORTS_ANALOG_PIN Enumeration
C
typedef enum {
PORTS_ANALOG_PIN_0,
PORTS_ANALOG_PIN_1,
PORTS_ANALOG_PIN_2,
PORTS_ANALOG_PIN_3,
PORTS_ANALOG_PIN_4,
PORTS_ANALOG_PIN_5,
PORTS_ANALOG_PIN_6,
PORTS_ANALOG_PIN_7,
PORTS_ANALOG_PIN_8,
PORTS_ANALOG_PIN_9,
PORTS_ANALOG_PIN_10,
PORTS_ANALOG_PIN_11,
PORTS_ANALOG_PIN_12,
PORTS_ANALOG_PIN_13,
PORTS_ANALOG_PIN_14,
PORTS_ANALOG_PIN_15,
PORTS_ANALOG_PIN_16,
PORTS_ANALOG_PIN_17,
PORTS_ANALOG_PIN_18,
PORTS_ANALOG_PIN_19,
PORTS_ANALOG_PIN_20,
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PORTS_ANALOG_PIN_21,
PORTS_ANALOG_PIN_22,
PORTS_ANALOG_PIN_23,
PORTS_ANALOG_PIN_24,
PORTS_ANALOG_PIN_25,
PORTS_ANALOG_PIN_26,
PORTS_ANALOG_PIN_27,
PORTS_ANALOG_PIN_28,
PORTS_ANALOG_PIN_29,
PORTS_ANALOG_PIN_30,
PORTS_ANALOG_PIN_31,
PORTS_ANALOG_PINS_ALL
} PORTS_ANALOG_PIN;
Description
PORTS Analog input pins
This data type defines the different Analog input pins
Members
Members Description
PORTS_ANALOG_PIN_0 Analog Input Pin 0
PORTS_ANALOG_PIN_1 Analog Input Pin 1
PORTS_ANALOG_PIN_2 Analog Input Pin 2
PORTS_ANALOG_PIN_3 Analog Input Pin 3
PORTS_ANALOG_PIN_4 Analog Input Pin 4
PORTS_ANALOG_PIN_5 Analog Input Pin 5
PORTS_ANALOG_PIN_6 Analog Input Pin 6
PORTS_ANALOG_PIN_7 Analog Input Pin 7
PORTS_ANALOG_PIN_8 Analog Input Pin 8
PORTS_ANALOG_PIN_9 Analog Input Pin 9
PORTS_ANALOG_PIN_10 Analog Input Pin 10
PORTS_ANALOG_PIN_11 Analog Input Pin 11
PORTS_ANALOG_PIN_12 Analog Input Pin 12
PORTS_ANALOG_PIN_13 Analog Input Pin 13
PORTS_ANALOG_PIN_14 Analog Input Pin 14
PORTS_ANALOG_PIN_15 Analog Input Pin 15
PORTS_ANALOG_PIN_16 Analog Input Pin 16
PORTS_ANALOG_PIN_17 Analog Input Pin 17
PORTS_ANALOG_PIN_18 Analog Input Pin 18
PORTS_ANALOG_PIN_19 Analog Input Pin 19
PORTS_ANALOG_PIN_20 Analog Input Pin 20
PORTS_ANALOG_PIN_21 Analog Input Pin 21
PORTS_ANALOG_PIN_22 Analog Input Pin 22
PORTS_ANALOG_PIN_23 Analog Input Pin 23
PORTS_ANALOG_PIN_24 Analog Input Pin 8
PORTS_ANALOG_PIN_25 Analog Input Pin 9
PORTS_ANALOG_PIN_26 Analog Input Pin 10
PORTS_ANALOG_PIN_27 Analog Input Pin 11
PORTS_ANALOG_PIN_28 Analog Input Pin 12
PORTS_ANALOG_PIN_29 Analog Input Pin 13
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PORTS_ANALOG_PIN_30 Analog Input Pin 14
PORTS_ANALOG_PIN_31 Analog Input Pin 15
PORTS_ANALOG_PINS_ALL All Analog Pins
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.17.6.5.2 PORTS_BIT_POS Enumeration
C
typedef enum {
PORTS_BIT_POS_0,
PORTS_BIT_POS_1,
PORTS_BIT_POS_2,
PORTS_BIT_POS_3,
PORTS_BIT_POS_4,
PORTS_BIT_POS_5,
PORTS_BIT_POS_6,
PORTS_BIT_POS_7,
PORTS_BIT_POS_8,
PORTS_BIT_POS_9,
PORTS_BIT_POS_10,
PORTS_BIT_POS_11,
PORTS_BIT_POS_12,
PORTS_BIT_POS_13,
PORTS_BIT_POS_14,
PORTS_BIT_POS_15
} PORTS_BIT_POS;
Description
PORTS bit positions
Lists the constants whic holds different bit positions of PORTS.
Members
Members Description
PORTS_BIT_POS_0 PORT bit position 0
PORTS_BIT_POS_1 PORT bit position 1
PORTS_BIT_POS_2 PORT bit position 2
PORTS_BIT_POS_3 PORT bit position 3
PORTS_BIT_POS_4 PORT bit position 4
PORTS_BIT_POS_5 PORT bit position 5
PORTS_BIT_POS_6 PORT bit position 6
PORTS_BIT_POS_7 PORT bit position 7
PORTS_BIT_POS_8 PORT bit position 8
PORTS_BIT_POS_9 PORT bit position 9
PORTS_BIT_POS_10 PORT bit position 10
PORTS_BIT_POS_11 PORT bit position 11
PORTS_BIT_POS_12 PORT bit position 12
PORTS_BIT_POS_13 PORT bit position 13
PORTS_BIT_POS_14 PORT bit position 14
PORTS_BIT_POS_15 PORT bit position 15
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Remarks
These are the superset enumerations provided for documentation, not all constants are available on all devices.
5.6.17.6.5.3 PORTS_CHANGE_NOTICE_PIN Enumeration
C
typedef enum {
PORTS_CHANGE_NOTICE_PIN_0,
PORTS_CHANGE_NOTICE_PIN_1,
PORTS_CHANGE_NOTICE_PIN_2,
PORTS_CHANGE_NOTICE_PIN_3,
PORTS_CHANGE_NOTICE_PIN_4,
PORTS_CHANGE_NOTICE_PIN_5,
PORTS_CHANGE_NOTICE_PIN_6,
PORTS_CHANGE_NOTICE_PIN_7,
PORTS_CHANGE_NOTICE_PIN_8,
PORTS_CHANGE_NOTICE_PIN_9,
PORTS_CHANGE_NOTICE_PIN_10,
PORTS_CHANGE_NOTICE_PIN_11,
PORTS_CHANGE_NOTICE_PIN_12,
PORTS_CHANGE_NOTICE_PIN_13,
PORTS_CHANGE_NOTICE_PIN_14,
PORTS_CHANGE_NOTICE_PIN_15,
PORTS_CHANGE_NOTICE_PIN_16,
PORTS_CHANGE_NOTICE_PIN_17,
PORTS_CHANGE_NOTICE_PIN_18,
PORTS_CHANGE_NOTICE_PIN_19,
PORTS_CHANGE_NOTICE_PIN_20,
PORTS_CHANGE_NOTICE_PIN_21,
PORTS_CHANGE_NOTICE_PIN_22,
PORTS_CHANGE_NOTICE_PIN_23,
PORTS_CHANGE_NOTICE_PIN_24,
PORTS_CHANGE_NOTICE_PIN_25,
PORTS_CHANGE_NOTICE_PIN_26,
PORTS_CHANGE_NOTICE_PIN_27,
PORTS_CHANGE_NOTICE_PIN_28,
PORTS_CHANGE_NOTICE_PIN_29,
PORTS_CHANGE_NOTICE_PIN_30,
PORTS_CHANGE_NOTICE_PIN_31,
PORTS_CHANGE_NOTICE_PIN_32,
PORTS_CHANGE_NOTICE_PIN_33,
PORTS_CHANGE_NOTICE_PIN_34,
PORTS_CHANGE_NOTICE_PIN_35,
PORTS_CHANGE_NOTICE_PIN_36,
PORTS_CHANGE_NOTICE_PIN_37,
PORTS_CHANGE_NOTICE_PIN_38,
PORTS_CHANGE_NOTICE_PIN_39,
PORTS_CHANGE_NOTICE_PIN_40,
PORTS_CHANGE_NOTICE_PIN_41,
PORTS_CHANGE_NOTICE_PIN_42,
PORTS_CHANGE_NOTICE_PIN_43,
PORTS_CHANGE_NOTICE_PIN_44,
PORTS_CHANGE_NOTICE_PIN_45,
PORTS_CHANGE_NOTICE_PIN_46,
PORTS_CHANGE_NOTICE_PIN_47,
PORTS_CHANGE_NOTICE_PIN_48,
PORTS_CHANGE_NOTICE_PIN_49,
PORTS_CHANGE_NOTICE_PIN_50,
PORTS_CHANGE_NOTICE_PIN_51,
PORTS_CHANGE_NOTICE_PIN_52,
PORTS_CHANGE_NOTICE_PIN_53,
PORTS_CHANGE_NOTICE_PIN_54,
PORTS_CHANGE_NOTICE_PIN_55,
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PORTS_CHANGE_NOTICE_PIN_56,
PORTS_CHANGE_NOTICE_PIN_57,
PORTS_CHANGE_NOTICE_PIN_58,
PORTS_CHANGE_NOTICE_PIN_59,
PORTS_CHANGE_NOTICE_PIN_60,
PORTS_CHANGE_NOTICE_PIN_61,
PORTS_CHANGE_NOTICE_PIN_62,
PORTS_CHANGE_NOTICE_PIN_63,
PORTS_CHANGE_NOTICE_PIN_64,
PORTS_CHANGE_NOTICE_PIN_65,
PORTS_CHANGE_NOTICE_PIN_66,
PORTS_CHANGE_NOTICE_PIN_67,
PORTS_CHANGE_NOTICE_PIN_68,
PORTS_CHANGE_NOTICE_PIN_69,
PORTS_CHANGE_NOTICE_PIN_70,
PORTS_CHANGE_NOTICE_PIN_71,
PORTS_CHANGE_NOTICE_PIN_72,
PORTS_CHANGE_NOTICE_PIN_73,
PORTS_CHANGE_NOTICE_PIN_74,
PORTS_CHANGE_NOTICE_PIN_75,
PORTS_CHANGE_NOTICE_PIN_76,
PORTS_CHANGE_NOTICE_PIN_77,
PORTS_CHANGE_NOTICE_PIN_78,
PORTS_CHANGE_NOTICE_PIN_79,
PORTS_CHANGE_NOTICE_PIN_80,
PORTS_CHANGE_NOTICE_PIN_81,
PORTS_CHANGE_NOTICE_PIN_82,
PORTS_CHANGE_NOTICE_PIN_83,
PORTS_CHANGE_NOTICE_PIN_84
} PORTS_CHANGE_NOTICE_PIN;
Description
Change Notification Pins enumeration
This data type defines the different Change Notification Pins enumeration
Members
Members Description
PORTS_CHANGE_NOTICE_PIN_0 Change Notification Pin 0
PORTS_CHANGE_NOTICE_PIN_1 Change Notification Pin 1
PORTS_CHANGE_NOTICE_PIN_2 Change Notification Pin 2
PORTS_CHANGE_NOTICE_PIN_3 Change Notification Pin 3
PORTS_CHANGE_NOTICE_PIN_4 Change Notification Pin 4
PORTS_CHANGE_NOTICE_PIN_5 Change Notification Pin 5
PORTS_CHANGE_NOTICE_PIN_6 Change Notification Pin 6
PORTS_CHANGE_NOTICE_PIN_7 Change Notification Pin 7
PORTS_CHANGE_NOTICE_PIN_8 Change Notification Pin 8
PORTS_CHANGE_NOTICE_PIN_9 Change Notification Pin 9
PORTS_CHANGE_NOTICE_PIN_10 Change Notification Pin 10
PORTS_CHANGE_NOTICE_PIN_11 Change Notification Pin 11
PORTS_CHANGE_NOTICE_PIN_12 Change Notification Pin 12
PORTS_CHANGE_NOTICE_PIN_13 Change Notification Pin 13
PORTS_CHANGE_NOTICE_PIN_14 Change Notification Pin 14
PORTS_CHANGE_NOTICE_PIN_15 Change Notification Pin 15
PORTS_CHANGE_NOTICE_PIN_16 Change Notification Pin 16
PORTS_CHANGE_NOTICE_PIN_17 Change Notification Pin 17
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PORTS_CHANGE_NOTICE_PIN_18 Change Notification Pin 18
PORTS_CHANGE_NOTICE_PIN_19 Change Notification Pin 19
PORTS_CHANGE_NOTICE_PIN_20 Change Notification Pin 20
PORTS_CHANGE_NOTICE_PIN_21 Change Notification Pin 21
PORTS_CHANGE_NOTICE_PIN_22 Change Notification Pin 22
PORTS_CHANGE_NOTICE_PIN_23 Change Notification Pin 23
PORTS_CHANGE_NOTICE_PIN_24 Change Notification Pin 24
PORTS_CHANGE_NOTICE_PIN_25 Change Notification Pin 25
PORTS_CHANGE_NOTICE_PIN_26 Change Notification Pin 26
PORTS_CHANGE_NOTICE_PIN_27 Change Notification Pin 27
PORTS_CHANGE_NOTICE_PIN_28 Change Notification Pin 28
PORTS_CHANGE_NOTICE_PIN_29 Change Notification Pin 29
PORTS_CHANGE_NOTICE_PIN_30 Change Notification Pin 30
PORTS_CHANGE_NOTICE_PIN_31 Change Notification Pin 31
PORTS_CHANGE_NOTICE_PIN_32 Change Notification Pin 32
PORTS_CHANGE_NOTICE_PIN_33 Change Notification Pin 33
PORTS_CHANGE_NOTICE_PIN_34 Change Notification Pin 34
PORTS_CHANGE_NOTICE_PIN_35 Change Notification Pin 35
PORTS_CHANGE_NOTICE_PIN_36 Change Notification Pin 36
PORTS_CHANGE_NOTICE_PIN_37 Change Notification Pin 37
PORTS_CHANGE_NOTICE_PIN_38 Change Notification Pin 38
PORTS_CHANGE_NOTICE_PIN_39 Change Notification Pin 39
PORTS_CHANGE_NOTICE_PIN_40 Change Notification Pin 40
PORTS_CHANGE_NOTICE_PIN_41 Change Notification Pin 41
PORTS_CHANGE_NOTICE_PIN_42 Change Notification Pin 42
PORTS_CHANGE_NOTICE_PIN_43 Change Notification Pin 43
PORTS_CHANGE_NOTICE_PIN_44 Change Notification Pin 44
PORTS_CHANGE_NOTICE_PIN_45 Change Notification Pin 45
PORTS_CHANGE_NOTICE_PIN_46 Change Notification Pin 46
PORTS_CHANGE_NOTICE_PIN_47 Change Notification Pin 47
PORTS_CHANGE_NOTICE_PIN_48 Change Notification Pin 48
PORTS_CHANGE_NOTICE_PIN_49 Change Notification Pin 49
PORTS_CHANGE_NOTICE_PIN_50 Change Notification Pin 50
PORTS_CHANGE_NOTICE_PIN_51 Change Notification Pin 51
PORTS_CHANGE_NOTICE_PIN_52 Change Notification Pin 52
PORTS_CHANGE_NOTICE_PIN_53 Change Notification Pin 53
PORTS_CHANGE_NOTICE_PIN_54 Change Notification Pin 54
PORTS_CHANGE_NOTICE_PIN_55 Change Notification Pin 55
PORTS_CHANGE_NOTICE_PIN_56 Change Notification Pin 56
PORTS_CHANGE_NOTICE_PIN_57 Change Notification Pin 57
PORTS_CHANGE_NOTICE_PIN_58 Change Notification Pin 58
PORTS_CHANGE_NOTICE_PIN_59 Change Notification Pin 59
PORTS_CHANGE_NOTICE_PIN_60 Change Notification Pin 60
PORTS_CHANGE_NOTICE_PIN_61 Change Notification Pin 61
PORTS_CHANGE_NOTICE_PIN_62 Change Notification Pin 62
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PORTS_CHANGE_NOTICE_PIN_63 Change Notification Pin 63
PORTS_CHANGE_NOTICE_PIN_64 Change Notification Pin 64
PORTS_CHANGE_NOTICE_PIN_65 Change Notification Pin 65
PORTS_CHANGE_NOTICE_PIN_66 Change Notification Pin 66
PORTS_CHANGE_NOTICE_PIN_67 Change Notification Pin 67
PORTS_CHANGE_NOTICE_PIN_68 Change Notification Pin 68
PORTS_CHANGE_NOTICE_PIN_69 Change Notification Pin 69
PORTS_CHANGE_NOTICE_PIN_70 Change Notification Pin 70
PORTS_CHANGE_NOTICE_PIN_71 Change Notification Pin 71
PORTS_CHANGE_NOTICE_PIN_72 Change Notification Pin 72
PORTS_CHANGE_NOTICE_PIN_73 Change Notification Pin 73
PORTS_CHANGE_NOTICE_PIN_74 Change Notification Pin 74
PORTS_CHANGE_NOTICE_PIN_75 Change Notification Pin 75
PORTS_CHANGE_NOTICE_PIN_76 Change Notification Pin 76
PORTS_CHANGE_NOTICE_PIN_77 Change Notification Pin 77
PORTS_CHANGE_NOTICE_PIN_78 Change Notification Pin 78
PORTS_CHANGE_NOTICE_PIN_79 Change Notification Pin 79
PORTS_CHANGE_NOTICE_PIN_80 Change Notification Pin 8
PORTS_CHANGE_NOTICE_PIN_81 Change Notification Pin 81
PORTS_CHANGE_NOTICE_PIN_82 Change Notification Pin 82
PORTS_CHANGE_NOTICE_PIN_83 Change Notification Pin 83
PORTS_CHANGE_NOTICE_PIN_84 Change Notification Pin 84
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.17.6.5.4 PORTS_CHANNEL Enumeration
C
typedef enum {
PORTS_CHANNEL_A,
PORTS_CHANNEL_B,
PORTS_CHANNEL_C,
PORTS_CHANNEL_D,
PORTS_CHANNEL_E,
PORTS_CHANNEL_F,
PORTS_CHANNEL_G,
PORTS_CHANNEL_H,
PORTS_CHANNEL_J,
PORTS_NUMBER_OF_CHANNELS
} PORTS_CHANNEL;
Description
PORT Channel ID
This enumeration identifies the available PORT Channels.
Members
Members Description
PORTS_CHANNEL_A Port A
PORTS_CHANNEL_B Port B
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PORTS_CHANNEL_C Port C
PORTS_CHANNEL_D Port D
PORTS_CHANNEL_E Port E
PORTS_CHANNEL_F Port F
PORTS_CHANNEL_G Port G
PORTS_CHANNEL_H Port H
PORTS_CHANNEL_J Port J
PORTS_NUMBER_OF_CHANNELS Max number of Ports
Remarks
The caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to
the next.
Not all modules will be available on all microcontrollers. Refer to the data sheet for the specific controller in use to determine
which modules are supported. The numbers used in the enumeration values will match the numbers given in the data sheet.
5.6.17.6.5.5 PORTS_DATA_MASK Type
C
typedef uint16_t PORTS_DATA_MASK;
Description
PORTS data mask definition
This data type defines the PORTS data mask
Remarks
This data type changes sizes, depending on if it is being used on an 8- 16- or 32-bit part.
5.6.17.6.5.6 PORTS_DATA_TYPE Type
C
typedef uint32_t PORTS_DATA_TYPE;
Description
PORTS data type definition
This data type defines the PORTS data type.
Remarks
This data type changes sizes, depending on if it is being used on an 8-, 16-, or 32-bit device.
5.6.17.6.5.7 PORTS_MODULE_ID Enumeration
C
typedef enum {
PORTS_ID_0,
PORT_NUMBER_OF_MODULES
} PORTS_MODULE_ID;
Description
PORT Module ID
This enumeration identifies the available PORT modules.
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Members
Members Description
PORT_NUMBER_OF_MODULES Max number of Instances
Remarks
Not all modules will be available on all microcontrollers. Refer to the data sheet for the specific controller in use to determine
which modules are supported. The numbers used in the enumeration values will match the numbers given in the data sheet.
5.6.17.6.5.8 PORTS_PERIPHERAL_OD Enumeration
C
typedef enum {
PORTS_PERIPHERAL_OD_MSSP1,
PORTS_PERIPHERAL_OD_MSSP2,
PORTS_PERIPHERAL_OD_ECCP1,
PORTS_PERIPHERAL_OD_ECCP2,
PORTS_PERIPHERAL_OD_ECCP3,
PORTS_PERIPHERAL_OD_CCP10,
PORTS_PERIPHERAL_OD_CCP9,
PORTS_PERIPHERAL_OD_CCP8,
PORTS_PERIPHERAL_OD_CCP7,
PORTS_PERIPHERAL_OD_CCP6,
PORTS_PERIPHERAL_OD_CCP5,
PORTS_PERIPHERAL_OD_CCP4,
PORTS_PERIPHERAL_OD_EUSART2,
PORTS_PERIPHERAL_OD_EUSART1
} PORTS_PERIPHERAL_OD;
Description
Peripherals available for Open drain Configuration
This data type defines the different Peripherals available for Open drain Configuration
Members
Members Description
PORTS_PERIPHERAL_OD_MSSP1 Peripheral Open Drain for MSSP1
PORTS_PERIPHERAL_OD_MSSP2 Peripheral Open Drain for MSSP2
PORTS_PERIPHERAL_OD_ECCP1 Peripheral Open Drain for ECCP1
PORTS_PERIPHERAL_OD_ECCP2 Peripheral Open Drain for ECCP2
PORTS_PERIPHERAL_OD_ECCP3 Peripheral Open Drain for ECCP3
PORTS_PERIPHERAL_OD_CCP10 Peripheral Open Drain for CCP10
PORTS_PERIPHERAL_OD_CCP9 Peripheral Open Drain for CCP9
PORTS_PERIPHERAL_OD_CCP8 Peripheral Open Drain for CCP8
PORTS_PERIPHERAL_OD_CCP7 Peripheral Open Drain for CCP7
PORTS_PERIPHERAL_OD_CCP6 Peripheral Open Drain for CCP6
PORTS_PERIPHERAL_OD_CCP5 Peripheral Open Drain for CCP5
PORTS_PERIPHERAL_OD_CCP4 Peripheral Open Drain for CCP4
PORTS_PERIPHERAL_OD_EUSART2 Peripheral Open Drain for EUSART2
PORTS_PERIPHERAL_OD_EUSART1 Peripheral Open Drain for EUSART1
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
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5.6.17.6.5.9 PORTS_PIN Enumeration
C
typedef enum {
PORTS_PIN_0,
PORTS_PIN_1,
PORTS_PIN_2,
PORTS_PIN_3,
PORTS_PIN_4,
PORTS_PIN_5,
PORTS_PIN_6,
PORTS_PIN_7,
PORTS_PIN_8,
PORTS_PIN_9,
PORTS_PIN_10,
PORTS_PIN_11,
PORTS_PIN_12,
PORTS_PIN_13,
PORTS_PIN_14,
PORTS_PIN_15
} PORTS_PIN;
Description
PORTS IO Pins enumeration
This data type defines the different PORTS IO Pins enumeration
Members
Members Description
PORTS_PIN_0 PORT Bit Position 0
PORTS_PIN_1 PORT Bit Position 1
PORTS_PIN_2 PORT Bit Position 2
PORTS_PIN_3 PORT Bit Position 3
PORTS_PIN_4 PORT Bit Position 4
PORTS_PIN_5 PORT Bit Position 5
PORTS_PIN_6 PORT Bit Position 6
PORTS_PIN_7 PORT Bit Position 7
PORTS_PIN_8 PORT Bit Position 8
PORTS_PIN_9 PORT Bit Position 9
PORTS_PIN_10 PORT Bit Position 10
PORTS_PIN_11 PORT Bit Position 11
PORTS_PIN_12 PORT Bit Position 12
PORTS_PIN_13 PORT Bit Position 13
PORTS_PIN_14 PORT Bit Position 14
PORTS_PIN_15 PORT Bit Position 15
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.17.6.5.10 PORTS_PIN_MODE Enumeration
C
typedef enum {
PORTS_PIN_MODE_ANALOG,
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PORTS_PIN_MODE_DIGITAL
} PORTS_PIN_MODE;
Description
PORTs Pin Mode
This enumeration identifies the available pin modes.
Members
Members Description
PORTS_PIN_MODE_ANALOG Port Pin is in Analog Mode
PORTS_PIN_MODE_DIGITAL Port pin is in Digital Mode
Remarks
Not all modules are available on all devices. Refer to the specific device data sheet to determine which modules are supported.
5.6.17.6.5.11 PORTS_REMAP_FUNCTION Enumeration
C
typedef enum {
PORTS_REMAP_FUNCTION_EXT_INT1,
PORTS_REMAP_FUNCTION_EXT_INT2,
PORTS_REMAP_FUNCTION_EXT_INT3,
PORTS_REMAP_FUNCTION_EXT_INT4,
PORTS_REMAP_FUNCTION_IC1,
PORTS_REMAP_FUNCTION_IC2,
PORTS_REMAP_FUNCTION_IC3,
PORTS_REMAP_FUNCTION_IC4,
PORTS_REMAP_FUNCTION_IC5,
PORTS_REMAP_FUNCTION_IC6,
PORTS_REMAP_FUNCTION_IC7,
PORTS_REMAP_FUNCTION_IC8,
PORTS_REMAP_FUNCTION_IC9,
PORTS_REMAP_FUNCTION_OC_FAULTA,
PORTS_REMAP_FUNCTION_OC_FAULTB,
PORTS_REMAP_FUNCTION_SPI1_CLOCK,
PORTS_REMAP_FUNCTION_SPI1_DATA,
PORTS_REMAP_FUNCTION_SPI1_SLAVE_SEL,
PORTS_REMAP_FUNCTION_SPI2_CLOCK,
PORTS_REMAP_FUNCTION_SPI2_DATA,
PORTS_REMAP_FUNCTION_SPI2_SLAVE_SEL,
PORTS_REMAP_FUNCTION_SPI3_CLOCK,
PORTS_REMAP_FUNCTION_SPI3_DATA,
PORTS_REMAP_FUNCTION_SPI3_SLAVE_SEL,
PORTS_REMAP_FUNCTION_TMR2_EXT_CLOCK,
PORTS_REMAP_FUNCTION_TMR3_EXT_CLOCK,
PORTS_REMAP_FUNCTION_TMR4_EXT_CLOCK,
PORTS_REMAP_FUNCTION_TMR5_EXT_CLOCK,
PORTS_REMAP_FUNCTION_USART1_CTS,
PORTS_REMAP_FUNCTION_USART1_RX,
PORTS_REMAP_FUNCTION_USART2_CTS,
PORTS_REMAP_FUNCTION_USART2_RX,
PORTS_REMAP_FUNCTION_USART3_CTS,
PORTS_REMAP_FUNCTION_USART3_RX,
PORTS_REMAP_FUNCTION_USART4_CTS,
PORTS_REMAP_FUNCTION_USART4_RX,
PORTS_REMAP_FUNCTION_NULL,
PORTS_REMAP_FUNCTION_C1OUT,
PORTS_REMAP_FUNCTION_C2OUT,
PORTS_REMAP_FUNCTION_U1TX,
PORTS_REMAP_FUNCTION_U1RTS,
PORTS_REMAP_FUNCTION_U2TX,
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PORTS_REMAP_FUNCTION_U2RTS,
PORTS_REMAP_FUNCTION_SDO1,
PORTS_REMAP_FUNCTION_SCK1OUT,
PORTS_REMAP_FUNCTION_SS1OUT,
PORTS_REMAP_FUNCTION_SDO2,
PORTS_REMAP_FUNCTION_SCK2OUT,
PORTS_REMAP_FUNCTION_SS2OUT,
PORTS_REMAP_FUNCTION_OC1,
PORTS_REMAP_FUNCTION_OC2,
PORTS_REMAP_FUNCTION_OC3,
PORTS_REMAP_FUNCTION_OC4,
PORTS_REMAP_FUNCTION_OC5,
PORTS_REMAP_FUNCTION_OC6,
PORTS_REMAP_FUNCTION_OC7,
PORTS_REMAP_FUNCTION_OC8,
PORTS_REMAP_FUNCTION_U3TX,
PORTS_REMAP_FUNCTION_U3RTS,
PORTS_REMAP_FUNCTION_U4TX,
PORTS_REMAP_FUNCTION_U4RTS,
PORTS_REMAP_FUNCTION_SDO3,
PORTS_REMAP_FUNCTION_SCK3OUT,
PORTS_REMAP_FUNCTION_SS3OUT,
PORTS_REMAP_FUNCTION_OC9,
PORTS_REMAP_FUNCTION_C3OUT
} PORTS_REMAP_FUNCTION;
Description
Remap Function Enumeration
This data type defines the different remap function enumeration
Members
Members Description
PORTS_REMAP_FUNCTION_EXT_INT1 Input Function Name - External Interrupt 1
PORTS_REMAP_FUNCTION_EXT_INT2 Input Function Name - External Interrupt 2
PORTS_REMAP_FUNCTION_EXT_INT3 Input Function Name - External Interrupt 3
PORTS_REMAP_FUNCTION_EXT_INT4 Input Function Name - External Interrupt 4
PORTS_REMAP_FUNCTION_IC1 Input Function Name - Input Capture 1
PORTS_REMAP_FUNCTION_IC2 Input Function Name - Input Capture 2
PORTS_REMAP_FUNCTION_IC3 Input Function Name - Input Capture 3
PORTS_REMAP_FUNCTION_IC4 Input Function Name - Input Capture 4
PORTS_REMAP_FUNCTION_IC5 Input Function Name - Input Capture 5
PORTS_REMAP_FUNCTION_IC6 Input Function Name - Input Capture 6
PORTS_REMAP_FUNCTION_IC7 Input Function Name - Input Capture 7
PORTS_REMAP_FUNCTION_IC8 Input Function Name - Input Capture 8
PORTS_REMAP_FUNCTION_IC9 Input Function Name - Input Capture 9
PORTS_REMAP_FUNCTION_OC_FAULTA Input Function Name - Output Compare Fault A
PORTS_REMAP_FUNCTION_OC_FAULTB Input Function Name - Output Compare Fault B
PORTS_REMAP_FUNCTION_SPI1_CLOCK Input Function Name - SPI 1 Clock
PORTS_REMAP_FUNCTION_SPI1_DATA Input Function Name - SPI1 Data
PORTS_REMAP_FUNCTION_SPI1_SLAVE_SEL Input Function Name - SPI1 Slave Select
PORTS_REMAP_FUNCTION_SPI2_CLOCK Input Function Name - SPI2 Clock
PORTS_REMAP_FUNCTION_SPI2_DATA Input Function Name - SPI2 Data
PORTS_REMAP_FUNCTION_SPI2_SLAVE_SEL Input Function Name - SPI2 Slave Select
PORTS_REMAP_FUNCTION_SPI3_CLOCK Input Function Name - SPI3 Clock
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PORTS_REMAP_FUNCTION_SPI3_DATA Input Function Name - SPI3 Data
PORTS_REMAP_FUNCTION_SPI3_SLAVE_SEL Input Function Name - SPI3 Slave Select
PORTS_REMAP_FUNCTION_TMR2_EXT_CLOCK Input Function Name - Timer 2 External CLock
PORTS_REMAP_FUNCTION_TMR3_EXT_CLOCK Input Function Name - Timer 3 External Clock
PORTS_REMAP_FUNCTION_TMR4_EXT_CLOCK Input Function Name - Timer 4 External Clock
PORTS_REMAP_FUNCTION_TMR5_EXT_CLOCK Input Function Name - Timer5 External Clock
PORTS_REMAP_FUNCTION_USART1_CTS Input Function Name - USART 1 Clear To Send
PORTS_REMAP_FUNCTION_USART1_RX Input Function Name - USART 1 Receive
PORTS_REMAP_FUNCTION_USART2_CTS Input Function Name - USART 2 Clear To Send
PORTS_REMAP_FUNCTION_USART2_RX Input Function Name - USART 2 Receive
PORTS_REMAP_FUNCTION_USART3_CTS Input Function Name - USART 3 Clear To Send
PORTS_REMAP_FUNCTION_USART3_RX Input Function Name - USART 3 Receive
PORTS_REMAP_FUNCTION_USART4_CTS Input Function Name - USART 4 Clear To Send
PORTS_REMAP_FUNCTION_USART4_RX Input Function Name - USART 4 Receive
PORTS_REMAP_FUNCTION_NULL Output Function Name - Null
PORTS_REMAP_FUNCTION_C1OUT Output Function Name - Comparator 1 Output
PORTS_REMAP_FUNCTION_C2OUT Output Function Name - Comparator 2 Output
PORTS_REMAP_FUNCTION_U1TX Output Function Name - UART1 Transmit
PORTS_REMAP_FUNCTION_U1RTS Output Function Name - UART1 Request To Send
PORTS_REMAP_FUNCTION_U2TX Output Function Name - UART2 Transmit
PORTS_REMAP_FUNCTION_U2RTS Output Function Name - UART2 Request To Send
PORTS_REMAP_FUNCTION_SDO1 Output Function Name - SPI1 Data Output
PORTS_REMAP_FUNCTION_SCK1OUT Output Function Name - SPI1 Clock Output
PORTS_REMAP_FUNCTION_SS1OUT Output Function Name - SPI1 Slave Select Output
PORTS_REMAP_FUNCTION_SDO2 Output Function Name - SPI2 Data Output
PORTS_REMAP_FUNCTION_SCK2OUT Output Function Name - SPI2 Clock Output
PORTS_REMAP_FUNCTION_SS2OUT Output Function Name - SPI2 Slave Select Output
PORTS_REMAP_FUNCTION_OC1 Output Function Name - Output Compare 1
PORTS_REMAP_FUNCTION_OC2 Output Function Name - Output Compare 2
PORTS_REMAP_FUNCTION_OC3 Output Function Name - Output Compare 3
PORTS_REMAP_FUNCTION_OC4 Output Function Name - Output Compare 4
PORTS_REMAP_FUNCTION_OC5 Output Function Name - Output Compare 5
PORTS_REMAP_FUNCTION_OC6 Output Function Name - Output Compare 6
PORTS_REMAP_FUNCTION_OC7 Output Function Name - Output Compare 7
PORTS_REMAP_FUNCTION_OC8 Output Function Name - Output Compare 8
PORTS_REMAP_FUNCTION_U3TX Output Function Name - UART3 Transmit
PORTS_REMAP_FUNCTION_U3RTS Output Function Name - UART3 Request To Send
PORTS_REMAP_FUNCTION_U4TX Output Function Name - UART4 Transmit
PORTS_REMAP_FUNCTION_U4RTS Output Function Name - UART4 Request To Send
PORTS_REMAP_FUNCTION_SDO3 Output Function Name - SPI3 Data Output
PORTS_REMAP_FUNCTION_SCK3OUT Output Function Name - SPI3 Clock Output
PORTS_REMAP_FUNCTION_SS3OUT Output Function Name - SPI3 Slave Select Output
PORTS_REMAP_FUNCTION_OC9 Output Function Name - Output Compare 9
PORTS_REMAP_FUNCTION_C3OUT Output Function Name - Comparator 3 Output
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.17.6.5.12 PORTS_REMAP_INPUT_FUNCTION Enumeration
C
typedef enum {
INPUT_FUNC_INT1,
INPUT_FUNC_INT2,
INPUT_FUNC_INT3,
INPUT_FUNC_INT4,
INPUT_FUNC_T2CK,
INPUT_FUNC_T3CK,
INPUT_FUNC_T4CK,
INPUT_FUNC_T5CK,
INPUT_FUNC_T6CK,
INPUT_FUNC_T7CK,
INPUT_FUNC_T8CK,
INPUT_FUNC_T9CK,
INPUT_FUNC_IC1,
INPUT_FUNC_IC2,
INPUT_FUNC_IC3,
INPUT_FUNC_IC4,
INPUT_FUNC_IC5,
INPUT_FUNC_IC6,
INPUT_FUNC_IC7,
INPUT_FUNC_IC8,
INPUT_FUNC_IC9,
INPUT_FUNC_OCFA,
INPUT_FUNC_OCFB,
INPUT_FUNC_U1RX,
INPUT_FUNC_U1CTS,
INPUT_FUNC_U2RX,
INPUT_FUNC_U2CTS,
INPUT_FUNC_U3RX,
INPUT_FUNC_U3CTS,
INPUT_FUNC_U4RX,
INPUT_FUNC_U4CTS,
INPUT_FUNC_U5RX,
INPUT_FUNC_U5CTS,
INPUT_FUNC_U6RX,
INPUT_FUNC_U6CTS,
INPUT_FUNC_SDI1,
INPUT_FUNC_SS1,
INPUT_FUNC_SDI2,
INPUT_FUNC_SS2,
INPUT_FUNC_SDI3,
INPUT_FUNC_SS3,
INPUT_FUNC_SDI4,
INPUT_FUNC_SS4,
INPUT_FUNC_SDI5,
INPUT_FUNC_SS5,
INPUT_FUNC_SDI6,
INPUT_FUNC_SS6,
INPUT_FUNC_C1RX,
INPUT_FUNC_C2RX,
INPUT_FUNC_REFCLKI1,
INPUT_FUNC_REFCLKI3,
INPUT_FUNC_REFCLKI4,
REMAP_NOT_SUPPORTED
} PORTS_REMAP_INPUT_FUNCTION;
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Description
Remap Input Function Enumeration
This data type defines the different remap input function enumeration.
Remarks
These are the superset enumerations provided for documentation, not all constants are available on all devices.
5.6.17.6.5.13 PORTS_REMAP_INPUT_PIN Enumeration
C
typedef enum {
INPUT_PIN_RPD2,
INPUT_PIN_RPG8,
INPUT_PIN_RPF4,
INPUT_PIN_RPD10,
INPUT_PIN_RPF1,
INPUT_PIN_RPB9,
INPUT_PIN_RPB10,
INPUT_PIN_RPC14,
INPUT_PIN_RPB5,
INPUT_PIN_RPC1,
INPUT_PIN_RPD14,
INPUT_PIN_RPG1,
INPUT_PIN_RPA14,
INPUT_PIN_RPD6,
INPUT_PIN_RPD3,
INPUT_PIN_RPG7,
INPUT_PIN_RPF5,
INPUT_PIN_RPD11,
INPUT_PIN_RPF0,
INPUT_PIN_RPB1,
INPUT_PIN_RPE5,
INPUT_PIN_RPC13,
INPUT_PIN_RPB3,
INPUT_PIN_RPC4,
INPUT_PIN_RPD15,
INPUT_PIN_RPG0,
INPUT_PIN_RPA15,
INPUT_PIN_RPD7,
INPUT_PIN_RPD9,
INPUT_PIN_RPG6,
INPUT_PIN_RPB8,
INPUT_PIN_RPB15,
INPUT_PIN_RPD4,
INPUT_PIN_RPB0,
INPUT_PIN_RPE3,
INPUT_PIN_RPB7,
INPUT_PIN_RPF12,
INPUT_PIN_RPD12,
INPUT_PIN_RPF8,
INPUT_PIN_RPC3,
INPUT_PIN_RPE9,
INPUT_PIN_RPD1,
INPUT_PIN_RPG9,
INPUT_PIN_RPB14,
INPUT_PIN_RPD0,
INPUT_PIN_RPB6,
INPUT_PIN_RPD5,
INPUT_PIN_RPB2,
INPUT_PIN_RPF3,
INPUT_PIN_RPF13,
INPUT_PIN_NC,
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INPUT_PIN_RPF2,
INPUT_PIN_RPC2,
INPUT_PIN_RPE8,
INPUT_PIN_RPF7,
INPUT_PIN_RPD8,
INPUT_PIN_RPA0,
INPUT_PIN_RPB4,
INPUT_PIN_RPC7,
INPUT_PIN_RPC0,
INPUT_PIN_RPC5,
INPUT_PIN_RPA1,
INPUT_PIN_RPB11,
INPUT_PIN_RPA8,
INPUT_PIN_RPC8,
INPUT_PIN_RPA9,
INPUT_PIN_RPA2,
INPUT_PIN_RPA4,
INPUT_PIN_RPB13,
INPUT_PIN_RPC6,
INPUT_PIN_RPA3,
INPUT_PIN_RPC9,
PIN_REMAP_NOT_SUPPORTED
} PORTS_REMAP_INPUT_PIN;
Description
PORTS IO Input Pins enumeration
This data type defines the different Ports I/O input pins enumeration.
Remarks
These are the superset enumerations provided for documentation, not all constants are available on all devices.
5.6.17.6.5.14 PORTS_REMAP_OUTPUT_FUNCTION Enumeration
C
typedef enum {
OTPUT_FUNC_U3TX,
OTPUT_FUNC_U4RTS,
OTPUT_FUNC_SDO1,
OTPUT_FUNC_SDO2,
OTPUT_FUNC_SDO3,
OTPUT_FUNC_SDO5,
OTPUT_FUNC_SS6,
OTPUT_FUNC_OC3,
OTPUT_FUNC_OC6,
OTPUT_FUNC_REFCLKO4,
OTPUT_FUNC_C2OUT,
OTPUT_FUNC_C1TX,
OTPUT_FUNC_U1TX,
OTPUT_FUNC_U2RTS,
OTPUT_FUNC_U5TX,
OTPUT_FUNC_U6RTS,
OTPUT_FUNC_SDO4,
OTPUT_FUNC_OC4,
OTPUT_FUNC_OC7,
OTPUT_FUNC_REFCLKO1,
OTPUT_FUNC_U3RTS,
OTPUT_FUNC_U4TX,
OTPUT_FUNC_U6TX,
OTPUT_FUNC_SS1,
OTPUT_FUNC_SS3,
OTPUT_FUNC_SS4,
OTPUT_FUNC_SS5,
OTPUT_FUNC_SDO6,
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OTPUT_FUNC_OC5,
OTPUT_FUNC_OC8,
OTPUT_FUNC_C1OUT,
OTPUT_FUNC_REFCLKO3,
OTPUT_FUNC_U1RTS,
OTPUT_FUNC_U2TX,
OTPUT_FUNC_U5RTS,
OTPUT_FUNC_SS2,
OTPUT_FUNC_OC2,
OTPUT_FUNC_OC1,
OTPUT_FUNC_OC9,
OTPUT_FUNC_C2TX,
OTPUT_FUNC_C3OUT,
OTPUT_FUNC_REFCLKO,
OTPUT_FUNC_NO_CONNECT
} PORTS_REMAP_OUTPUT_FUNCTION;
Description
Remap Output Function Enumeration
This data type defines the different remap output function enumeration.
Remarks
These are the superset enumerations provided for documentation, not all constants are available on all devices.
5.6.17.6.5.15 PORTS_REMAP_OUTPUT_PIN Enumeration
C
typedef enum {
OUTPUT_PIN_RPA0,
OUTPUT_PIN_RPA1,
OUTPUT_PIN_RPA2,
OUTPUT_PIN_RPA3,
OUTPUT_PIN_RPA4,
OUTPUT_PIN_RPA8,
OUTPUT_PIN_RPA9,
OUTPUT_PIN_RPA14,
OUTPUT_PIN_RPA15,
OUTPUT_PIN_RPB0,
OUTPUT_PIN_RPB1,
OUTPUT_PIN_RPB2,
OUTPUT_PIN_RPB3,
OUTPUT_PIN_RPB4,
OUTPUT_PIN_RPB5,
OUTPUT_PIN_RPB6,
OUTPUT_PIN_RPB7,
OUTPUT_PIN_RPB8,
OUTPUT_PIN_RPB9,
OUTPUT_PIN_RPB10,
OUTPUT_PIN_RPB11,
OUTPUT_PIN_RPB13,
OUTPUT_PIN_RPB14,
OUTPUT_PIN_RPB15,
OUTPUT_PIN_RPC0,
OUTPUT_PIN_RPC1,
OUTPUT_PIN_RPC2,
OUTPUT_PIN_RPC3,
OUTPUT_PIN_RPC4,
OUTPUT_PIN_RPC5,
OUTPUT_PIN_RPC6,
OUTPUT_PIN_RPC7,
OUTPUT_PIN_RPC8,
OUTPUT_PIN_RPC9,
OUTPUT_PIN_RPC13,
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OUTPUT_PIN_RPC14,
OUTPUT_PIN_RPD0,
OUTPUT_PIN_RPD1,
OUTPUT_PIN_RPD2,
OUTPUT_PIN_RPD3,
OUTPUT_PIN_RPD4,
OUTPUT_PIN_RPD5,
OUTPUT_PIN_RPD6,
OUTPUT_PIN_RPD7,
OUTPUT_PIN_RPD8,
OUTPUT_PIN_RPD9,
OUTPUT_PIN_RPD10,
OUTPUT_PIN_RPD11,
OUTPUT_PIN_RPD12,
OUTPUT_PIN_RPD14,
OUTPUT_PIN_RPD15,
OUTPUT_PIN_RPE3,
OUTPUT_PIN_RPE5,
OUTPUT_PIN_RPE8,
OUTPUT_PIN_RPE9,
OUTPUT_PIN_RPF0,
OUTPUT_PIN_RPF1,
OUTPUT_PIN_RPF2,
OUTPUT_PIN_RPF3,
OUTPUT_PIN_RPF4,
OUTPUT_PIN_RPF5,
OUTPUT_PIN_RPF6,
OUTPUT_PIN_RPF7,
OUTPUT_PIN_RPF8,
OUTPUT_PIN_RPF12,
OUTPUT_PIN_RPF13,
OUTPUT_PIN_RPG0,
OUTPUT_PIN_RPG1,
OUTPUT_PIN_RPG6,
OUTPUT_PIN_RPG7,
OUTPUT_PIN_RPG8,
OUTPUT_PIN_RPG9,
REMAP_NOT_SUPPORTED
} PORTS_REMAP_OUTPUT_PIN;
Description
PORTS IO Output Pins enumeration
This data type defines the different Ports I/O output pins enumeration.
Remarks
These are the superset enumerations provided for documentation, not all constants are available on all devices.
5.6.17.6.5.16 PORTS_REMAP_PIN Enumeration
C
typedef enum {
PORTS_REMAP_PIN_RPI0,
PORTS_REMAP_PIN_RPI1,
PORTS_REMAP_PIN_RPI2,
PORTS_REMAP_PIN_RPI3,
PORTS_REMAP_PIN_RPI4,
PORTS_REMAP_PIN_RPI5,
PORTS_REMAP_PIN_RPI6,
PORTS_REMAP_PIN_RPI7,
PORTS_REMAP_PIN_RPI8,
PORTS_REMAP_PIN_RPI9,
PORTS_REMAP_PIN_RPI10,
PORTS_REMAP_PIN_RPI11,
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PORTS_REMAP_PIN_RPI12
,
PORTS_REMAP_PIN_RPI13
,
PORTS_REMAP_PIN_RPI14
,
PORTS_REMAP_PIN_RPI15
,
PORTS_REMAP_PIN_RPI16
,
PORTS_REMAP_PIN_RPI17
,
PORTS_REMAP_PIN_RPI18
,
PORTS_REMAP_PIN_RPI19
,
PORTS_REMAP_PIN_RPI20
,
PORTS_REMAP_PIN_RPI21
,
PORTS_REMAP_PIN_RPI22
,
PORTS_REMAP_PIN_RPI23
,
PORTS_REMAP_PIN_RPI24
,
PORTS_REMAP_PIN_RPI25
,
PORTS_REMAP_PIN_RPI26
,
PORTS_REMAP_PIN_RPI27
,
PORTS_REMAP_PIN_RPI28
,
PORTS_REMAP_PIN_RPI29
,
PORTS_REMAP_PIN_RPI30
,
PORTS_REMAP_PIN_RPI31
,
PORTS_REMAP_PIN_RPI32
,
PORTS_REMAP_PIN_RPI33
,
PORTS_REMAP_PIN_RPI34
,
PORTS_REMAP_PIN_RPI35
,
PORTS_REMAP_PIN_RPI36
,
PORTS_REMAP_PIN_RPI37
,
PORTS_REMAP_PIN_RPI38
,
PORTS_REMAP_PIN_RPI39
,
PORTS_REMAP_PIN_RPI40
,
PORTS_REMAP_PIN_RPI41
,
PORTS_REMAP_PIN_RPI42
,
PORTS_REMAP_PIN_RPI43
,
PORTS_REMAP_PIN_RPI44
,
PORTS_REMAP_PIN_RPI45
,
PORTS_REMAP_PIN_RP0
,
PORTS_REMAP_PIN_RP1
,
PORTS_REMAP_PIN_RP2
,
PORTS_REMAP_PIN_RP3
,
PORTS_REMAP_PIN_RP4
,
PORTS_REMAP_PIN_RP5
,
PORTS_REMAP_PIN_RP6
,
PORTS_REMAP_PIN_RP7
,
PORTS_REMAP_PIN_RP8
,
PORTS_REMAP_PIN_RP9
,
PORTS_REMAP_PIN_RP10
,
PORTS_REMAP_PIN_RP11
,
PORTS_REMAP_PIN_RP12
,
PORTS_REMAP_PIN_RP13
,
PORTS_REMAP_PIN_RP14
,
PORTS_REMAP_PIN_RP15
,
PORTS_REMAP_PIN_RP16
,
PORTS_REMAP_PIN_RP17
,
PORTS_REMAP_PIN_RP18
,
PORTS_REMAP_PIN_RP19
,
PORTS_REMAP_PIN_RP20
,
PORTS_REMAP_PIN_RP21
,
PORTS_REMAP_PIN_RP22
,
PORTS_REMAP_PIN_RP23
,
PORTS_REMAP_PIN_RP24
,
PORTS_REMAP_PIN_RP25
,
PORTS_REMAP_PIN_RP26
,
PORTS_REMAP_PIN_RP27
,
PORTS_REMAP_PIN_RP28
,
PORTS_REMAP_PIN_RP29
,
PORTS_REMAP_PIN_RP30
,
PORTS_REMAP_PIN_RP31
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} PORTS_REMAP_PIN;
Description
Remappable input/output Enumeration
This data type defines the different remappable input/output enumeration
Members
Members Description
PORTS_REMAP_PIN_RPI0 Remappable input RPI0
PORTS_REMAP_PIN_RPI1 Remappable input RPI1
PORTS_REMAP_PIN_RPI2 Remappable input RPI2
PORTS_REMAP_PIN_RPI3 Remappable input RPI3
PORTS_REMAP_PIN_RPI4 Remappable input RPI4
PORTS_REMAP_PIN_RPI5 Remappable input RPI5
PORTS_REMAP_PIN_RPI6 Remappable input RPI6
PORTS_REMAP_PIN_RPI7 Remappable input RPI7
PORTS_REMAP_PIN_RPI8 Remappable input RPI8
PORTS_REMAP_PIN_RPI9 Remappable input RPI9
PORTS_REMAP_PIN_RPI10 Remappable input RPI10
PORTS_REMAP_PIN_RPI11 Remappable input RPI11
PORTS_REMAP_PIN_RPI12 Remappable input RPI12
PORTS_REMAP_PIN_RPI13 Remappable input RPI13
PORTS_REMAP_PIN_RPI14 Remappable input RPI14
PORTS_REMAP_PIN_RPI15 Remappable input RPI15
PORTS_REMAP_PIN_RPI16 Remappable input RPI16
PORTS_REMAP_PIN_RPI17 Remappable input RPI17
PORTS_REMAP_PIN_RPI18 Remappable input RPI18
PORTS_REMAP_PIN_RPI19 Remappable input RPI19
PORTS_REMAP_PIN_RPI20 Remappable input RPI20
PORTS_REMAP_PIN_RPI21 Remappable input RPI21
PORTS_REMAP_PIN_RPI22 Remappable input RPI22
PORTS_REMAP_PIN_RPI23 Remappable input RPI23
PORTS_REMAP_PIN_RPI24 Remappable input RPI24
PORTS_REMAP_PIN_RPI25 Remappable input RPI25
PORTS_REMAP_PIN_RPI26 Remappable input RPI26
PORTS_REMAP_PIN_RPI27 Remappable input RPI27
PORTS_REMAP_PIN_RPI28 Remappable input RPI28
PORTS_REMAP_PIN_RPI29 Remappable input RPI29
PORTS_REMAP_PIN_RPI30 Remappable input RPI30
PORTS_REMAP_PIN_RPI31 Remappable input RPI31
PORTS_REMAP_PIN_RPI32 Remappable input RPI32
PORTS_REMAP_PIN_RPI33 Remappable input RPI33
PORTS_REMAP_PIN_RPI34 Remappable input RPI34
PORTS_REMAP_PIN_RPI35 Remappable input RPI35
PORTS_REMAP_PIN_RPI36 Remappable input RPI36
PORTS_REMAP_PIN_RPI37 Remappable input RPI37
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
5-2648
PORTS_REMAP_PIN_RPI38 Remappable input RPI38
PORTS_REMAP_PIN_RPI39 Remappable input RPI39
PORTS_REMAP_PIN_RPI40 Remappable input RPI40
PORTS_REMAP_PIN_RPI41 Remappable input RPI41
PORTS_REMAP_PIN_RPI42 Remappable input RPI42
PORTS_REMAP_PIN_RPI43 Remappable input RPI43
PORTS_REMAP_PIN_RPI44 Remappable input RPI44
PORTS_REMAP_PIN_RPI45 Remappable input RPI45
PORTS_REMAP_PIN_RP0 Remappable output RP0
PORTS_REMAP_PIN_RP1 Remappable output RP1
PORTS_REMAP_PIN_RP2 Remappable output RP2
PORTS_REMAP_PIN_RP3 Remappable output RP3
PORTS_REMAP_PIN_RP4 Remappable output RP4
PORTS_REMAP_PIN_RP5 Remappable output RP5
PORTS_REMAP_PIN_RP6 Remappable output RP6
PORTS_REMAP_PIN_RP7 Remappable output RP7
PORTS_REMAP_PIN_RP8 Remappable output RP8
PORTS_REMAP_PIN_RP9 Remappable output RP9
PORTS_REMAP_PIN_RP10 Remappable output RP10
PORTS_REMAP_PIN_RP11 Remappable output RP11
PORTS_REMAP_PIN_RP12 Remappable output RP12
PORTS_REMAP_PIN_RP13 Remappable output RP13
PORTS_REMAP_PIN_RP14 Remappable output RP14
PORTS_REMAP_PIN_RP15 Remappable output RP15
PORTS_REMAP_PIN_RP16 Remappable output RP16
PORTS_REMAP_PIN_RP17 Remappable output RP17
PORTS_REMAP_PIN_RP18 Remappable output RP18
PORTS_REMAP_PIN_RP19 Remappable output RP19
PORTS_REMAP_PIN_RP20 Remappable output RP20
PORTS_REMAP_PIN_RP21 Remappable output RP21
PORTS_REMAP_PIN_RP22 Remappable output RP22
PORTS_REMAP_PIN_RP23 Remappable output RP23
PORTS_REMAP_PIN_RP24 Remappable output RP24
PORTS_REMAP_PIN_RP25 Remappable output RP25
PORTS_REMAP_PIN_RP26 Remappable output RP26
PORTS_REMAP_PIN_RP27 Remappable output RP27
PORTS_REMAP_PIN_RP28 Remappable output RP28
PORTS_REMAP_PIN_RP29 Remappable output RP29
PORTS_REMAP_PIN_RP30 Remappable output RP30
PORTS_REMAP_PIN_RP31 Remappable output RP31
Remarks
These are the super set enumerations provided for documentation, not all constants are available on all parts
5.6.17.6.6 Feature Existence Functions
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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5.6.17.6.6.1 PLIB_PORTS_ExistsChangeNotice Function
C
bool PLIB_PORTS_ExistsChangeNotice(
PORTS_MODULE_ID index
);
Description
This function identifies whether the ChangeNotice feature is available on the PORTS module. When this function returns true,
these functions are supported on the device:
• PLIB_PORTS_ChangeNoticeEnable
• PLIB_PORTS_ChangeNoticeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChangeNotice feature is supported on the device
• false - The ChangeNotice feature is not supported on the device
Remarks
None.
5.6.17.6.6.2 PLIB_PORTS_ExistsChangeNoticeInIdle Function
C
bool PLIB_PORTS_ExistsChangeNoticeInIdle(
PORTS_MODULE_ID index
);
Description
This function identifies whether the ChangeNoticeInIdle feature is available on the PORTS module. When this function returns
true, these functions are supported on the device:
• PLIB_PORTS_ChangeNoticeInIdleEnable
• PLIB_PORTS_ChangeNoticeInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChangeNoticeInIdle feature is supported on the device
• false - The ChangeNoticeInIdle feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Remarks
None.
5.6.17.6.6.3 PLIB_PORTS_ExistsChangeNoticePerPortInIdle Function
C
bool PLIB_PORTS_ExistsChangeNoticePerPortInIdle(
PORTS_MODULE_ID index
);
Description
This function identifies whether the ChangeNoticeInIdlePerPort feature is available on the PORTS module. When this function
returns true, these functions are supported on the device:
• PLIB_PORTS_ChangeNoticeInIdlePerPortEnable
• PLIB_PORTS_ChangeNoticeInIdlePerPortDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChangeNoticeInIdlePerPort feature is supported on the device
• false - The ChangeNoticeInIdlePerPort feature is not supported on the device
Remarks
None.
5.6.17.6.6.4 PLIB_PORTS_ExistsChangeNoticePerPortStatus Function
C
bool PLIB_PORTS_ExistsChangeNoticePerPortStatus(
PORTS_MODULE_ID index
);
Description
This function identifies whether the ChangeNoticePerPortStatus feature is available on the PORTS module. When this function
returns true, these functions are supported on the device:
• PLIB_PORTS_ChangeNoticePerPortHasOccured
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChangeNoticePerPortStatus feature is supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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• false - The ChangeNoticePerPortStatus feature is not supported on the device
Remarks
None.
5.6.17.6.6.5 PLIB_PORTS_ExistsChangeNoticePerPortTurnOn Function
C
bool PLIB_PORTS_ExistsChangeNoticePerPortTurnOn(
PORTS_MODULE_ID index
);
Description
This function identifies whether the ChangeNoticePerPortTurnOn feature is available on the PORTS module. When this function
returns true, these functions are supported on the device:
• PLIB_PORTS_ChangeNoticePerPortTurnOn
• PLIB_PORTS_ChangeNoticePerPortTurnOff
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChangeNoticePerPortTurnOn feature is supported on the device
• false - The ChangeNoticePerPortTurnOn feature is not supported on the device
Remarks
None.
5.6.17.6.6.6 PLIB_PORTS_ExistsChangeNoticePullDownPerPort Function
C
bool PLIB_PORTS_ExistsChangeNoticePullDownPerPort(
PORTS_MODULE_ID index
);
Description
This function identifies whether the ChangeNoticePullDownPerPort feature is available on the PORTS module. When this
function returns true, these functions are supported on the device:
• PLIB_PORTS_ChangeNoticePullDownPerPortEnable
• PLIB_PORTS_ChangeNoticePullDownPerPortDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Returns
• true - The ChangeNoticePullDownPerPort feature is supported on the device
• false - The ChangeNoticePullDownPerPort feature is not supported on the device
Remarks
None.
5.6.17.6.6.7 PLIB_PORTS_ExistsChangeNoticePullUp Function
C
bool PLIB_PORTS_ExistsChangeNoticePullUp(
PORTS_MODULE_ID index
);
Description
This function identifies whether the ChangeNoticePullup feature is available on the PORTS module. When this function returns
true, these functions are supported on the device:
• PLIB_PORTS_ChangeNoticePullUpEnable
• PLIB_PORTS_ChangeNoticePullUpDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChangeNoticePullup feature is supported on the device
• false - The ChangeNoticePullup feature is not supported on the device
Remarks
None.
5.6.17.6.6.8 PLIB_PORTS_ExistsChangeNoticePullUpPerPort Function
C
bool PLIB_PORTS_ExistsChangeNoticePullUpPerPort(
PORTS_MODULE_ID index
);
Description
This function identifies whether the ChangeNoticePullUpPerPort feature is available on the PORTS module. When this function
returns true, these functions are supported on the device:
• PLIB_PORTS_ChangeNoticePullUpPerPortEnable
• PLIB_PORTS_ChangeNoticePullUpPerPortDisable
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChangeNoticePullUpPerPort feature is supported on the device
• false - The ChangeNoticePullUpPerPort feature is not supported on the device
Remarks
None.
5.6.17.6.6.9 PLIB_PORTS_ExistsPinChangeNotice Function
C
bool PLIB_PORTS_ExistsPinChangeNotice(
PORTS_MODULE_ID index
);
Description
This function identifies whether the PinChangeNotice feature is available on the PORTS module. When this function returns true,
these functions are supported on the device:
• PLIB_PORTS_PinChangeNoticeEnable
• PLIB_PORTS_PinChangeNoticeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PinChangeNotice feature is supported on the device
• false - The PinChangeNotice feature is not supported on the device
Remarks
None.
5.6.17.6.6.10 PLIB_PORTS_ExistsPinChangeNoticePerPort Function
C
bool PLIB_PORTS_ExistsPinChangeNoticePerPort(
PORTS_MODULE_ID index
);
Description
This function identifies whether the PinChangeNoticePerPort feature is available on the PORTS module. When this function
returns true, these functions are supported on the device:
• PLIB_PORTS_PinChangeNoticePerPortEnable
• PLIB_PORTS_PinChangeNoticePerPortDisable
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PinChangeNoticePerPort feature is supported on the device
• false - The PinChangeNoticePerPort feature is not supported on the device
Remarks
None.
5.6.17.6.6.11 PLIB_PORTS_ExistsPinMode Function
C
bool PLIB_PORTS_ExistsPinMode(
PORTS_MODULE_ID index
);
Description
This function identifies whether the PinMode feature is available on the PORTS module. When this function returns true, these
functions are supported on the device:
• PLIB_PORTS_PinModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PinMode feature is supported on the device
• false - The PinMode feature is not supported on the device
Remarks
None.
5.6.17.6.6.12 PLIB_PORTS_ExistsPinModePerPort Function
C
bool PLIB_PORTS_ExistsPinModePerPort(
PORTS_MODULE_ID index
);
Description
This function identifies whether the PinModePerPort feature is available on the PORTS module. When this function returns true,
these functions are supported on the device:
• PLIB_PORTS_PinModePerPortSelect
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PinModePerPort feature is supported on the device
• false - The PinModePerPort feature is not supported on the device
Remarks
None.
5.6.17.6.6.13 PLIB_PORTS_ExistsPortsDirection Function
C
bool PLIB_PORTS_ExistsPortsDirection(
PORTS_MODULE_ID index
);
Description
This function identifies whether the PortsDirection feature is available on the PORTS module. When this function returns true,
these functions are supported on the device:
• PLIB_PORTS_PinDirectionInputSet
• PLIB_PORTS_PinDirectionOutputSet
• PLIB_PORTS_DirectionInputSet
• PLIB_PORTS_DirectionOutputSet
• PLIB_PORTS_DirectionGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PortsDirection feature is supported on the device
• false - The PortsDirection feature is not supported on the device
Remarks
None.
5.6.17.6.6.14 PLIB_PORTS_ExistsPortsOpenDrain Function
C
bool PLIB_PORTS_ExistsPortsOpenDrain(
PORTS_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
5-2656
Description
This function identifies whether the PortsOpenDrain feature is available on the PORTS module. When this function returns true,
these functions are supported on the device:
• PLIB_PORTS_PinOpenDrainEnable
• PLIB_PORTS_PinOpenDrainDisable
• PLIB_PORTS_OpenDrainEnable
• PLIB_PORTS_OpenDrainDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PortsOpenDrain feature is supported on the device
• false - The PortsOpenDrain feature is not supported on the device
Remarks
None.
5.6.17.6.6.15 PLIB_PORTS_ExistsPortsRead Function
C
bool PLIB_PORTS_ExistsPortsRead(
PORTS_MODULE_ID index
);
Description
This function identifies whether the PortsRead feature is available on the PORTS module. When this function returns true, these
functions are supported on the device:
• PLIB_PORTS_PinGet
• PLIB_PORTS_Read
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PortsRead feature is supported on the device
• false - The PortsRead feature is not supported on the device
Remarks
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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5.6.17.6.6.16 PLIB_PORTS_ExistsPortsWrite Function
C
bool PLIB_PORTS_ExistsPortsWrite(
PORTS_MODULE_ID index
);
Description
This function identifies whether the PortsWrite feature is available on the PORTS module. When this function returns true, these
functions are supported on the device:
• PLIB_PORTS_PinWrite
• PLIB_PORTS_PinSet
• PLIB_PORTS_PinClear
• PLIB_PORTS_PinToggle
• PLIB_PORTS_Write
• PLIB_PORTS_Set
• PLIB_PORTS_Toggle
• PLIB_PORTS_Clear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PortsWrite feature is supported on the device
• false - The PortsWrite feature is not supported on the device
Remarks
None.
5.6.17.6.6.17 PLIB_PORTS_ExistsRemapInput Function
C
bool PLIB_PORTS_ExistsRemapInput(
PORTS_MODULE_ID index
);
Description
This function identifies whether the RemapInput feature is available on the PORTS module. When this function returns true,
these functions are supported on the device:
• PLIB_PORTS_RemapInput
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RemapInput feature is supported on the device
• false - The RemapInput feature is not supported on the device
Remarks
None.
5.6.17.6.6.18 PLIB_PORTS_ExistsRemapOutput Function
C
bool PLIB_PORTS_ExistsRemapOutput(
PORTS_MODULE_ID index
);
Description
This function identifies whether the RemapOutput feature is available on the PORTS module. When this function returns true,
these functions are supported on the device:
• PLIB_PORTS_RemapOutput
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RemapOutput feature is supported on the device
• false - The RemapOutput feature is not supported on the device
Remarks
None.
5.6.17.7 Files
Files
Name Description
plib_ports.h Ports Peripheral Library Interface header for Ports function definitions.
Description
5.6.17.7.1 plib_ports.h
Ports Peripheral Library Interface Header
5.6 Peripheral Library Help MPLAB Harmony Help Ports Peripheral Library
5-2659
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Ports Peripheral Library for all families of Microchip microcontrollers. The definitions in this file are common to the Ports
peripheral.
Functions
Name Description
PLIB_PORTS_ChangeNoticeDisable Global Change Notice disable.
PLIB_PORTS_ChangeNoticeEnable Global Change Notice enable.
PLIB_PORTS_ChangeNoticeInIdleDisable CPU Idle does not affect Change Notice operation.
PLIB_PORTS_ChangeNoticeInIdleEnable CPU Idle mode halts Change Notice operation.
PLIB_PORTS_ChangeNoticeInIdlePerPortDisable Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticeInIdlePerPortEnable Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePerPortHasOccured Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePerPortTurnOff Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePerPortTurnOn Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePullDownPerPortDisable Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePullDownPerPortEnable Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePullUpDisable Disable pull-up on input change.
PLIB_PORTS_ChangeNoticePullUpEnable Enable pull-up on input change.
PLIB_PORTS_ChangeNoticePullUpPerPortDisable Enables the selected pin as analog or digital.
PLIB_PORTS_ChangeNoticePullUpPerPortEnable Enables the selected pin as analog or digital.
PLIB_PORTS_Clear Clears the selected digital port/latch.
PLIB_PORTS_DirectionGet Reads the direction of the selected digital port.
PLIB_PORTS_DirectionInputSet Enables the read (input) direction for the selected port.
PLIB_PORTS_DirectionOutputSet Enables the write (output) direction for the selected port.
PLIB_PORTS_ExistsChangeNotice Identifies whether the ChangeNotice feature exists on the
PORTS module
PLIB_PORTS_ExistsChangeNoticeInIdle Identifies whether the ChangeNoticeInIdle feature exists on
the PORTS module
PLIB_PORTS_ExistsChangeNoticePerPortInIdle Identifies whether the ChangeNoticeInIdlePerPort feature
exists on the PORTS module
PLIB_PORTS_ExistsChangeNoticePerPortStatus Identifies whether the ChangeNoticePerPortStatus feature
exists on the PORTS module
PLIB_PORTS_ExistsChangeNoticePerPortTurnOn Identifies whether the ChangeNoticePerPortTurnOn feature
exists on the PORTS module
PLIB_PORTS_ExistsChangeNoticePullDownPerPort Identifies whether the ChangeNoticePullDownPerPort
feature exists on the PORTS module
PLIB_PORTS_ExistsChangeNoticePullUp Identifies whether the ChangeNoticePullup feature exists
on the PORTS module
PLIB_PORTS_ExistsChangeNoticePullUpPerPort Identifies whether the ChangeNoticePullUpPerPort feature
exists on the PORTS module
PLIB_PORTS_ExistsPinChangeNotice Identifies whether the PinChangeNotice feature exists on
the PORTS module
PLIB_PORTS_ExistsPinChangeNoticePerPort Identifies whether the PinChangeNoticePerPort feature
exists on the PORTS module
PLIB_PORTS_ExistsPinMode Identifies whether the PinMode feature exists on the
PORTS module
PLIB_PORTS_ExistsPinModePerPort Identifies whether the PinModePerPort feature exists on the
PORTS module
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PLIB_PORTS_ExistsPortsDirection Identifies whether the PortsDirection feature exists on the
PORTS module
PLIB_PORTS_ExistsPortsOpenDrain Identifies whether the PortsOpenDrain feature exists on the
PORTS module
PLIB_PORTS_ExistsPortsRead Identifies whether the PortsRead feature exists on the
PORTS module
PLIB_PORTS_ExistsPortsWrite Identifies whether the PortsWrite feature exists on the
PORTS module
PLIB_PORTS_ExistsRemapInput Identifies whether the RemapInput feature exists on the
PORTS module
PLIB_PORTS_ExistsRemapOutput Identifies whether the RemapOutput feature exists on the
PORTS module
PLIB_PORTS_OpenDrainDisable Disables the open drain functionality for the selected port.
PLIB_PORTS_OpenDrainEnable Enables the open drain functionality for the selected port.
PLIB_PORTS_PinChangeNoticeDisable Port pin Change Notice disable.
PLIB_PORTS_PinChangeNoticeEnable Port pin Change Notice enable.
PLIB_PORTS_PinChangeNoticePerPortDisable Enables the selected pin as analog or digital.
PLIB_PORTS_PinChangeNoticePerPortEnable Enables the selected pin as analog or digital.
PLIB_PORTS_PinClear Clears the selected digital pin/latch.
PLIB_PORTS_PinDirectionInputSet Enables the read (input) direction for the selected pin.
PLIB_PORTS_PinDirectionOutputSet Enables the write (output) direction for the selected pin.
PLIB_PORTS_PinGet Reads/Gets data from the selected digital pin.
PLIB_PORTS_PinModePerPortSelect Enables the selected pin as analog or digital.
PLIB_PORTS_PinModeSelect Enables the selected pin as analog or digital.
PLIB_PORTS_PinOpenDrainDisable Disables the open drain functionality for the selected pin.
PLIB_PORTS_PinOpenDrainEnable Enables the open drain functionality for the selected pin.
PLIB_PORTS_PinSet Sets the selected digital pin/latch.
PLIB_PORTS_PinToggle Toggles the selected digital pin/latch.
PLIB_PORTS_PinWrite Writes the selected digital pin/latch.
PLIB_PORTS_Read Reads the selected digital port.
PLIB_PORTS_RemapInput Input/Output (I/O) function remapping.
PLIB_PORTS_RemapOutput Input/Output (I/O) function remapping.
PLIB_PORTS_Set Writes the selected digital port/latch based on the mask.
PLIB_PORTS_Toggle Toggles the selected digital port/latch.
PLIB_PORTS_Write Writes the selected digital port/latch.
Types
Name Description
PORTS_DATA_MASK Data type defining the PORTS data mask
PORTS_DATA_TYPE Data type defining the PORTS data type.
File Name
plib_ports.h
Company
Microchip Technology Inc.
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5.6.18 Power Peripheral Library
5.6.18.1 Introduction
Power Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Power Controller modules on Microchip microcontrollers with a convenient C
language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the
module's registers, thereby hiding differences from one microcontroller variant to another.
Description
Power Controller Overview
The Power Controller is a key component of a microcontroller. Power control features allow the user to obtain the balance of
power consumption and performance that is best suited to their application.
The features provided in this library discuss specific software commands that are used dynamically to place the device in
low-power (i.e., power-saving) modes, which disable power and clocking of selected features. When implementing a system to
achieve the lowest possible power consumption while maintain the needed performance, the oscillator configuration and clocking
of all peripherals must also be considered. Oscillator configuration and peripheral clocking are addressed in the Oscillator
Peripheral Library. In addition, each peripheral may have its own low-power mode settings that are controlled by the library of
that peripheral. The user is advised to refer to the libraries of the peripherals used for their particular application.
Key features present on a power controller include (a microcontroller can support one or more of these power features):
• Power Source Configuration: Provides the ability to enable and disable a source that may regulate the power consumption
in the device
• Power Status Flags: Indicate the status of the particular power feature in the device
Note: Please refer to the the specific device data sheet to determine the exact set of supported features.
5.6.18.2 Release Notes
MPLAB Harmony Version: v0.70b Power Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
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5.6.18.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.18.4 Using the Library
Using the Library
This topic describes the basic architecture of the Power Peripheral Library and provides information and examples on how to use
it.
Interface Header File: plib_power.h
The interface to the Power Peripheral Library is defined in the "plib_power.h" header file, which is included by the "peripheral.h"
peripheral library header file. Any C language source (.c) file that uses the Power Peripheral Library must include "peripheral.h".
Peripheral Module IDs
Peripheral libraries are indexed to allow a single library to control any number of instances of a peripheral in a single
microcontroller. To support this, the first parameter to each operation in a peripheral library is the module instance ID. The
module instance ID is defined by an enumeration that is defined in the processor-specific header files (included by the library's
interface header). Not all microcontrollers will have all instances of the module listed in this enumeration. Please refer to the
specific data sheet to determine availability.
5.6.18.4.1 Hardware Abstraction Model
This library provides a low-level abstraction of the Power Controller module on Microchip microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
Description
Hardware Abstraction Block Diagram
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This section discusses the various power-saving features implemented in hardware. Combinations of these methods can be
used to selectively tailor an application’s power consumption, while still maintaining critical or timing-sensitive application
features.
Note: Not all devices support all of the features discussed in this section. Please refer to specific device data sheet to determine
the supported features for your device.
Instruction-based Power-Saving Modes
In addition to full-power operation, otherwise known as Run mode, PIC microcontrollers also provide other instruction-based
power-saving modes. By powering down to different modes, different functional areas of the microcontroller allow progressive
reductions of operating and idle power consumption. In addition, these modes can be tailored for more power reduction, but at a
trade-off of some operating features.
• Idle Mode: In Idle mode, the CPU is halted, but the System Clock (SYSCLK) source is still enabled. This allows peripherals to
continue to operate when the CPU is halted. Peripherals can be individually configured to halt when entering Idle mode by
setting their respective SIDL bit. Latency when exiting Idle mode is very low due to the CPU oscillator source remaining active.
• Sleep Mode: The CPU, SYSCLK source and any peripherals that operate on the system clock source are disabled
• Deep Sleep Mode: The CPU SYSCLK source, and all the peripherals, with the exception of the Real-Time Clock and
Calendar (RTCC) and the Deep Sleep Watchdog Timer (DSWDT), are disabled. This is the lowest power mode for the device.
The power to RAM and Flash is also disabled. Deep Sleep mode represents the lowest power mode available without
removing power from the application.
The instruction-based power-saving modes are exited as a result of several different hardware triggers. When the device exits
one of these three operating modes, it is said to ‘wake-up’.
Hardware-based Power-Saving Mode
VBAT mode is a hardware-based power-saving mode that maintains only the most critical operations when a power loss occurs
on VDD. The mode does this by powering the systems from a back-up power source connected to the VBAT pin. In this mode,
the RTCC can run even when there is no power on VDD.
VBAT mode is entered whenever power is removed from VDD. An on-chip power switch detects the power loss from VDD and
connects the VBAT pin to the low-voltage regulator. Entering VBAT mode requires that a power source, distinct from the main
VDD power source, be available on the VBAT pin and that VDD be completely removed from the VDD pin(s). Removing VDD
can be either unintentional, as in a power failure, or as part of a deliberate power reduction strategy.
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Note: Not all devices support all of the features discussed in this section. Please refer to specific device data sheet to determine
the supported features for your device.
Selective Peripheral Power Control
Sleep and Idle modes allow users to substantially reduce power consumption by slowing or stopping the CPU clock. Even so,
peripheral modules may still remain clocked, and thus, consume some amount of power.There may be cases where the
application needs what these modes do not provide: the ability to allocate limited power resources to the CPU while eliminating
power consumption from the peripherals. PIC microcontrollers address this requirement by allowing peripheral modules to be
selectively enabled or disabled, reducing or eliminating their power consumption.
In addition to the selective peripheral power control implemented as part of this library, devices will also include power saving
features that are implemented in their specific libraries. These features include the ability to stop (shutdown) automatically when
entering idle mode. On some peripherals the ability to continue operation in Sleep mode is available. Always review the libraries
for the peripherals used by your application for specific and unique features that will help minimize power consumption.
Disabling Peripheral Modules
Most of the peripheral modules in the PIC microcontroller family architecture can be selectively disabled, reducing or essentially
eliminating their power consumption during all operating modes.
All peripheral modules (except for I/O ports) also have a Control bit that can disable their functionality.These bits, known as the
Peripheral Module Disable (PMD) bits, are generically named: “xxMD”. These bits are located in the PMDx Special Function
Registers (SFRs). In contrast to the module enable bits, the xxMD bit must be set to a '1' to disable the module.
While the PMD and module enable bits both disable a peripheral’s functionality, the PMD bit completely shuts down the
peripheral, effectively powering down all circuits and removing all clock sources. This has the additional effect of making any of
the module’s control and buffer registers, mapped in the SFR space, unavailable for operations. In other words, when the PMD
bit is used to disable a module, the peripheral ceases to exist until the PMD bit is cleared.
The PMD bit is most useful in highly power-sensitive applications, where even tiny savings in power consumption can determine
the ability of an application to function. In these cases, the bits can be set before the main body of the application to remove
those peripherals that will not be needed.
5.6.18.4.2 Library Usage Model
Note: The interface provided is a superset of all power functionality available on the device. Refer to the "Power-Saving
Features" chapter in the specific device data sheet for availability.
This library provides the low-level abstraction of the Power Controller module available on the Microchip family of
microcontrollers with a convenient C language interface. This topic describes how that abstraction is modeled in the software
and introduces the library interface.
The library interface routines are divided into various subsections, each of the sub-sections addresses one of the blocks or the
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overall operation of the Power Controller module.
Library Interface Section Description
Initialization Functions This section provides a set of functions for configuring the Power-Saving
features and enabling or disabling the particular power feature.
Status Functions This section provides a function to read the status of a particular power
feature.
Note: Not all modes are available on all devices. Refer to the "Power-Saving Features" chapter in the specific device data
sheet for availability.
5.6.18.4.3 How the Library Works
Usage of this library is partitioned into two major sections.
Initialization
The steps that are required to initialize the Power Controller module vary for different microcontrollers. Refer to the specific
device data sheet to determine the correct initialization sequence. The following information provides a general overview.
Power Source Setup
• A module can be disabled for the microcontroller to be able to save power. Use the function PLIB_POWER_ModuleDisable to
disable the particular module. POWER_MODULE_DISABLE provides a list of possible modules sources.
• On most microcontrollers, the voltage regulator can be controlled during Sleep mode. It can be enabled (turned on) using
PLIB_POWER_VoltageRegulatorEnable and disabled (turned off) using PLIB_POWER_VoltageRegulatorDisable.
• On some microcontrollers, Deep Sleep mode is enabled using PLIB_POWER_DeepSleepModeEnable and Brown-out Reset
in Deep Sleep mode is enabled using PLIB_POWER_DeepSleepBOREnable. The Deep Sleep mode is disabled using
PLIB_POWER_DeepSleepModeDisable and Brown-out Reset in Deep Sleep mode is disabled using
PLIB_POWER_DeepSleepBORDisable.
Power Status
Status of the particular power feature indicates the previous status of that feature. This feature can be used to determine whether
the device was in Sleep or Idle mode before waking up. It also allows software to clear the previous status of the device.
5.6.18.5 Configuring the Library
The library is configured for the supported Power Controller modules when the processor is chosen in the MPLAB IDE.
5.6.18.6 Library Interface
Data Types and Constants
Name Description
POWER_MODULE List of the modules whose power can be controlled.
POWER_MODULE_ID Identifies the supported Power modules.
Feature Existence Functions
Name Description
PLIB_POWER_ExistsDeepSleepBOR Identifies whether the DeepSleepBORControl feature exists
on the POWER module
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PLIB_POWER_ExistsDeepSleepFaultDetect Identifies whether the DeepSleepFaultDetectStatus feature
exists on the POWER module
PLIB_POWER_ExistsDeepSleepInterruptOnChange Identifies whether the DeepSleepIOCStatus feature exists on
the POWER module
PLIB_POWER_ExistsDeepSleepMCLREvent Identifies whether the DeepSleepMCLRStatus feature exists
on the POWER module
PLIB_POWER_ExistsDeepSleepMode Identifies whether the DeepSleepModeControl feature exists
on the POWER module
PLIB_POWER_ExistsDeepSleepPowerOnReset Identifies whether the DeepSleepPORStatus feature exists
on the POWER module
PLIB_POWER_ExistsIdleStatus Identifies whether the IdleStatus feature exists on the
POWER module
PLIB_POWER_ExistsPeripheralModuleControl Identifies whether the PeripheralModuleControl feature exists
on the POWER module
PLIB_POWER_ExistsSleepStatus Identifies whether the SleepStatus feature exists on the
POWER module
PLIB_POWER_ExistsVoltageRegulatorControl Identifies whether the VoltageRegulatorControl feature exists
on the POWER module
Initialization Functions
Name Description
PLIB_POWER_DeepSleepBORDisable Disables the Deep Sleep BOR.
PLIB_POWER_DeepSleepBOREnable Enables the Deep Sleep BOR mode.
PLIB_POWER_DeepSleepModeDisable Disables the Deep Sleep mode.
PLIB_POWER_DeepSleepModeEnable Enables the Deep Sleep mode.
PLIB_POWER_PeripheralModuleDisable Disable the power supply for the module selected in the source.
PLIB_POWER_PeripheralModuleEnable Enable the power supply for the module selected in the source.
PLIB_POWER_PeripheralModuleIsEnabled Check if selected peripheral is enabled or not
PLIB_POWER_VoltageRegulatorDisable Disables the voltage regulator during Sleep mode.
PLIB_POWER_VoltageRegulatorEnable Enable the voltage regulator during Sleep mode.
Status Functions
Name Description
PLIB_POWER_ClearIdleStatus Clears the Idle mode status of the device.
PLIB_POWER_ClearSleepStatus Clear the Sleep mode status bit of the device.
PLIB_POWER_DeepSleepFaultDetectStatus Returns the status of Deep Sleep Fault Detect bit.
PLIB_POWER_DeepSleepInterruptOnChangeStatus Returns the status of the Deep Sleep Interrupt-on-Change bit.
PLIB_POWER_DeepSleepMCLREventStatus Returns the status of the Deep Sleep MCLR Event bit.
PLIB_POWER_DeepSleepPowerOnResetStatus Returns the status of Deep Sleep Power-on Reset bit.
PLIB_POWER_DeviceWasInIdleMode Returns the Idle mode status of the device.
PLIB_POWER_DeviceWasInSleepMode Returns the Sleep mode status of the device.
PLIB_POWER_VoltageRegulatorIsEnabled Provides the status of the voltage regulator during Sleep
mode.
Description
This section lists and describes the functions, data types, and constants provided in the Power Peripheral Library.
5.6.18.6.1 Initialization Functions
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5.6.18.6.1.1 PLIB_POWER_DeepSleepBORDisable Function
C
void PLIB_POWER_DeepSleepBORDisable(
POWER_MODULE_ID index
);
Description
This function disables the Deep Sleep BOR. The Deep Sleep BOR is independent of the standard BOR and a Deep Sleep BOR
event will not cause a wake-up from Deep Sleep.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsDeepSleepBOR in your application to determine whether this feature is available.
Example
PLIB_POWER_DeepSleepBORDisable(POWER_ID_0);
5.6.18.6.1.2 PLIB_POWER_DeepSleepBOREnable Function
C
void PLIB_POWER_DeepSleepBOREnable(
POWER_MODULE_ID index
);
Description
This function enables the Deep Sleep BOR mode. The Deep Sleep BOR is ndependent of the standard BOR and a Deep Sleep
BOR event will not cause a wake-up from Deep Sleep.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsDeepSleepBOR in your application to determine whether this feature is available.
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Example
PLIB_POWER_DeepSleepBOREnable(POWER_ID_0);
5.6.18.6.1.3 PLIB_POWER_DeepSleepModeDisable Function
C
void PLIB_POWER_DeepSleepModeDisable(
POWER_MODULE_ID index
);
Description
This function disables the Deep Sleep mode. Deep Sleep mode is intended to provide the lowest levels of power consumption
available without requiring the use of external switches to completely remove all power from the device.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsDeepSleepMode in your application to determine whether this feature is available.
Example
PLIB_POWER_DeepSleepModeDisable(POWER_ID_0);
5.6.18.6.1.4 PLIB_POWER_DeepSleepModeEnable Function
C
void PLIB_POWER_DeepSleepModeEnable(
POWER_MODULE_ID index
);
Description
This function enables the Deep Sleep mode. Deep Sleep mode is intended to provide the lowest levels of power consumption
available without requiring the use of external switches to completely remove all power from the device.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_POWER_ExistsDeepSleepMode in your application to determine whether this feature is available.
Example
PLIB_POWER_DeepSleepModeEnable(POWER_ID_0);
5.6.18.6.1.5 PLIB_POWER_PeripheralModuleDisable Function
C
void PLIB_POWER_PeripheralModuleDisable(
POWER_MODULE_ID index,
POWER_MODULE source
);
Description
This function completely shuts down the selected peripheral, effectively powering down all circuits and removing all clock
sources. This has the additional effect of making any of the module’s control and buffer registers, which are mapped in the SFR
space, unavailable for operations.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
source Select the module to be disabled from POWER_MODULE enum
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsPeripheralModuleControl in your application to determine whether this feature is available.
Example
PLIB_POWER_PeripheralModuleDisable (POWER_ID_0, POWER_MODULE_ADC);
5.6.18.6.1.6 PLIB_POWER_PeripheralModuleEnable Function
C
void PLIB_POWER_PeripheralModuleEnable(
POWER_MODULE_ID index,
POWER_MODULE source
);
Description
This function enables the power supply back to the selected module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
source Select the module to be enabled from POWER_MODULE enum
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsPeripheralModuleControl in your application to determine whether this feature is available.
Example
PLIB_POWER_PeripheralModuleEnable (POWER_ID_0, POWER_MODULE_ADC);
5.6.18.6.1.7 PLIB_POWER_PeripheralModuleIsEnabled Function
C
bool PLIB_POWER_PeripheralModuleIsEnabled(
POWER_MODULE_ID index,
POWER_MODULE source
);
Description
This function checks if selected peripheral is enabled or not.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
source Select the module to be enabled from POWER_MODULE enum
Returns
• true - Power of the selected peripheral is enabled
• false - Power of the selected peripheral is disabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsPeripheralModuleControl in your application to determine whether this feature is available.
Example
if (PLIB_POWER_PeripheralModuleIsEnabled ( POWER_MODULE_0, POWER_MODULE_ADC ))
{
}
5.6.18.6.1.8 PLIB_POWER_VoltageRegulatorDisable Function
C
void PLIB_POWER_VoltageRegulatorDisable(
POWER_MODULE_ID index
);
Description
This function disables the voltage regulator into during Sleep mode for the selected device.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsVoltageRegulatorControl in your application to determine whether this feature is available.
Example
PLIB_POWER_VoltageRegulatorDisable(POWER_ID_0);
5.6.18.6.1.9 PLIB_POWER_VoltageRegulatorEnable Function
C
void PLIB_POWER_VoltageRegulatorEnable(
POWER_MODULE_ID index
);
Description
This function enables the voltage regulator during Sleep mode for the selected device.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsVoltageRegulatorControl in your application to determine whether this feature is available.
Example
PLIB_POWER_VoltageRegulatorEnable(POWER_ID_0);
5.6.18.6.2 Status Functions
5.6.18.6.2.1 PLIB_POWER_ClearIdleStatus Function
C
void PLIB_POWER_ClearIdleStatus(
POWER_MODULE_ID index
);
Description
This function clears the Idle status bit of the device if it was previously in Idle mode. However, it does not mean that it wakes up
the device from Idle.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsIdleStatus in your application to determine whether this feature is available.
Example
if(PLIB_POWER_DeviceWasInIdleMode(POWER_ID_0))
{
PLIB_POWER_ClearIdleStatus (POWER_ID_0);
}
5.6.18.6.2.2 PLIB_POWER_ClearSleepStatus Function
C
void PLIB_POWER_ClearSleepStatus(
POWER_MODULE_ID index
);
Description
This function clears the Sleep status bit of the device if it was previously in Sleep mode. However, it does not mean that it wakes
up the device from sleep.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsSleepStatus in your application to determine whether this feature is available.
Example
if(PLIB_POWER_DeviceWasInSleepMode(POWER_ID_0))
{
PLIB_POWER_ClearSleepStatus (POWER_ID_0);
}
5.6.18.6.2.3 PLIB_POWER_DeepSleepFaultDetectStatus Function
C
bool PLIB_POWER_DeepSleepFaultDetectStatus(
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POWER_MODULE_ID index
);
Description
This function returns the status of the Deep Sleep Fault Detect bit.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
true - A Fault occurred during Deep Sleep, and some Deep Sleep configuration settings may have been corrupted false - No
Fault was detected during Deep Sleep
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsDeepSleepFaultDetect in your application to determine whether this feature is available.
Example
if(PLIB_POWER_DeepSleepFaultDetectStatus(POWER_ID_0))
{
}
5.6.18.6.2.4 PLIB_POWER_DeepSleepInterruptOnChangeStatus Function
C
bool PLIB_POWER_DeepSleepInterruptOnChangeStatus(
POWER_MODULE_ID index
);
Description
This function returns the status of the Deep Sleep Interrupt-on-Change bit.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Interrupt-on-Change was asserted during Deep Sleep
• false - Interrupt-on-Change was not asserted during Deep Sleep
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsDeepSleepInterruptOnChange in your application to determine whether this feature is available.
Example
if(PLIB_POWER_DeepSleepInterruptOnChangeStatus(POWER_ID_0))
{
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}
5.6.18.6.2.5 PLIB_POWER_DeepSleepMCLREventStatus Function
C
bool PLIB_POWER_DeepSleepMCLREventStatus(
POWER_MODULE_ID index
);
Description
This function returns the status of the Deep Sleep MCLR Event bit.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - The MCLR pin was active and was asserted during Deep Sleep
• false - The MCLR pin was not active, or was active, but not asserted during Deep Sleep
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsDeepSleepMCLREvent in your application to determine whether this feature is available.
Example
if(PLIB_POWER_DeepSleepMCLREventStatus(POWER_ID_0))
{
}
5.6.18.6.2.6 PLIB_POWER_DeepSleepPowerOnResetStatus Function
C
bool PLIB_POWER_DeepSleepPowerOnResetStatus(
POWER_MODULE_ID index
);
Description
This function returns the status of the Deep Sleep Power-on Reset bit.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - The VDD supply POR circuit was active and a POR event was detected
• false - The VDD supply POR circuit was not active, or was active but did not detect a POR event
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_POWER_ExistsDeepSleepPowerOnReset in your application to determine whether this feature is available.
Example
if(PLIB_POWER_DeepSleepPowerOnResetStatus(POWER_ID_0))
{
}
5.6.18.6.2.7 PLIB_POWER_DeviceWasInIdleMode Function
C
bool PLIB_POWER_DeviceWasInIdleMode(
POWER_MODULE_ID index
);
Description
This function returns the Idle mode status of the device. It tells whether or not the device was in Idle mode before waking up.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - The device was in Idle mode before waking up
• false - The device was not in Idle mode
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsIdleStatus in your application to determine whether this feature is available.
Example
if(PLIB_POWER_DeviceWasInIdleMode(POWER_ID_0))
{
}
5.6.18.6.2.8 PLIB_POWER_DeviceWasInSleepMode Function
C
bool PLIB_POWER_DeviceWasInSleepMode(
POWER_MODULE_ID index
);
Description
This function returns the Sleep mode status of the device. It tells whether or not the device was in Sleep mode before waking up.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
• true - The device was in Sleep mode before waking up
• false - The device was not in Sleep mode
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsSleepStatus in your application to determine whether this feature is available.
Example
if(PLIB_POWER_DeviceWasInSleepMode(POWER_ID_0))
{
}
5.6.18.6.2.9 PLIB_POWER_VoltageRegulatorIsEnabled Function
C
bool PLIB_POWER_VoltageRegulatorIsEnabled(
POWER_MODULE_ID index
);
Description
This function provides the status of the voltage regulator during Sleep mode for the selected device.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - The voltage regulator will be enabled in Sleep mode
• false - The voltage regulator will be disabled in Sleep mode
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_POWER_ExistsVoltageRegulatorControl in your application to determine whether this feature is available.
Example
if (PLIB_POWER_VoltageRegulatorIsEnabled(POWER_ID_0))
{
}
5.6.18.6.3 Data Types and Constants
5.6.18.6.3.1 POWER_MODULE Enumeration
C
typedef enum {
POWER_MODULE_ADC1,
POWER_MODULE_CTMU,
POWER_MODULE_CVR,
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POWER_MODULE_CMP1
,
POWER_MODULE_CMP2
,
POWER_MODULE_CMP3
,
POWER_MODULE_IC1
,
POWER_MODULE_IC2
,
POWER_MODULE_IC3
,
POWER_MODULE_IC4
,
POWER_MODULE_IC5
,
POWER_MODULE_IC6
,
POWER_MODULE_IC7
,
POWER_MODULE_IC8
,
POWER_MODULE_IC9
,
POWER_MODULE_OC1
,
POWER_MODULE_OC2
,
POWER_MODULE_OC3
,
POWER_MODULE_OC4
,
POWER_MODULE_OC5
,
POWER_MODULE_OC6
,
POWER_MODULE_OC7
,
POWER_MODULE_OC8
,
POWER_MODULE_OC9
,
POWER_MODULE_TMR1
,
POWER_MODULE_TMR2
,
POWER_MODULE_TMR3
,
POWER_MODULE_TMR4
,
POWER_MODULE_TMR5
,
POWER_MODULE_TMR6
,
POWER_MODULE_TMR7
,
POWER_MODULE_TMR8
,
POWER_MODULE_TMR9
,
POWER_MODULE_UART1
,
POWER_MODULE_UART2
,
POWER_MODULE_UART3
,
POWER_MODULE_UART4
,
POWER_MODULE_UART5
,
POWER_MODULE_UART6
,
POWER_MODULE_SPI1
,
POWER_MODULE_SPI2
,
POWER_MODULE_SPI3
,
POWER_MODULE_SPI4
,
POWER_MODULE_SPI5
,
POWER_MODULE_SPI6
,
POWER_MODULE_I2C1
,
POWER_MODULE_I2C2
,
POWER_MODULE_I2C3
,
POWER_MODULE_I2C4
,
POWER_MODULE_I2C5
,
POWER_MODULE_USB
,
POWER_MODULE_CAN1
,
POWER_MODULE_CAN2
,
POWER_MODULE_RTCC
,
POWER_MODULE_REF_CLK_OUTPUT
,
POWER_MODULE_REF_CLK_OUTPUT1
,
POWER_MODULE_REF_CLK_OUTPUT2
,
POWER_MODULE_REF_CLK_OUTPUT3
,
POWER_MODULE_REF_CLK_OUTPUT4
,
POWER_MODULE_PMP
,
POWER_MODULE_EBI
,
POWER_MODULE_SQI
,
POWER_MODULE_ETHERNET
,
POWER_MODULE_DMA
,
POWER_MODULE_RANDOM_NUM_GENERATOR
,
POWER_MODULE_CRYPTO
} POWER_MODULE;
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Description
POWER module enumeration
This enumeration lists the modules whose power can be controlled by PMD registers
Members
Members Description
POWER_MODULE_ADC1 ADC module
POWER_MODULE_CTMU Charge Time Measurement Unit module
POWER_MODULE_CVR Comparator Voltage Reference module
POWER_MODULE_CMP1 Comparator module 1
POWER_MODULE_CMP2 Comparator module 2
POWER_MODULE_CMP3 Comparator module 3
POWER_MODULE_IC1 Input Capture 1 module
POWER_MODULE_IC2 Input Capture 2 module
POWER_MODULE_IC3 Input Capture 3 module
POWER_MODULE_IC4 Input Capture 4 module
POWER_MODULE_IC5 Input Capture 5 module
POWER_MODULE_IC6 Input Capture 6 module
POWER_MODULE_IC7 Input Capture 7 module
POWER_MODULE_IC8 Input Capture 8 module
POWER_MODULE_IC9 Input Capture 9 module
POWER_MODULE_OC1 Output Compare 1 module
POWER_MODULE_OC2 Output Compare 2 module
POWER_MODULE_OC3 Output Compare 3 module
POWER_MODULE_OC4 Output Compare 4 module
POWER_MODULE_OC5 Output Compare 5 module
POWER_MODULE_OC6 Output Compare 6 module
POWER_MODULE_OC7 Output Compare 7 module
POWER_MODULE_OC8 Output Compare 8 module
POWER_MODULE_OC9 Output Compare 9 module
POWER_MODULE_TMR1 Timer1 module
POWER_MODULE_TMR2 Timer2 module
POWER_MODULE_TMR3 Timer3 module
POWER_MODULE_TMR4 Timer4 module
POWER_MODULE_TMR5 Timer5 module
POWER_MODULE_TMR6 Timer6 module
POWER_MODULE_TMR7 Timer7 module
POWER_MODULE_TMR8 Timer8 module
POWER_MODULE_TMR9 Timer9 module
POWER_MODULE_UART1 UART1 module
POWER_MODULE_UART2 UART2 module
POWER_MODULE_UART3 UART3 module
POWER_MODULE_UART4 UART4 module
POWER_MODULE_UART5 UART5 module
POWER_MODULE_UART6 UART6 module
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POWER_MODULE_SPI1 SPI1 module
POWER_MODULE_SPI2 SPI2 module
POWER_MODULE_SPI3 SPI3 module
POWER_MODULE_SPI4 SPI4 module
POWER_MODULE_SPI5 SPI5 module
POWER_MODULE_SPI6 SPI6 module
POWER_MODULE_I2C1 I2C1 module
POWER_MODULE_I2C2 I2C2 module
POWER_MODULE_I2C3 I2C3 module
POWER_MODULE_I2C4 I2C4 module
POWER_MODULE_I2C5 I2C5 module
POWER_MODULE_USB USB module
POWER_MODULE_CAN1 CAN1 module
POWER_MODULE_CAN2 CAN2 module
POWER_MODULE_RTCC RealTime Clock and Calender module
POWER_MODULE_REF_CLK_OUTPUT Reference Clock Output module
POWER_MODULE_REF_CLK_OUTPUT1 Reference Clock Output module 1
POWER_MODULE_REF_CLK_OUTPUT2 Reference Clock Output module 2
POWER_MODULE_REF_CLK_OUTPUT3 Reference Clock Output module 3
POWER_MODULE_REF_CLK_OUTPUT4 Reference Clock Output module 4
POWER_MODULE_PMP Parallel Master Port module
POWER_MODULE_EBI External Bus Interface module
POWER_MODULE_SQI Serial Quad Interface module
POWER_MODULE_ETHERNET Ethernet module
POWER_MODULE_DMA Data Memory Access module
POWER_MODULE_RANDOM_NUM_GENERATOR Random Number Generator module
POWER_MODULE_CRYPTO Cryptographic module
Remarks
Not all modules exist in all devices. Please refer to the specific device data sheet for availability.
5.6.18.6.3.2 POWER_MODULE_ID Enumeration
C
typedef enum {
POWER_ID_0,
POWER_NUMBER_OF_MODULES
} POWER_MODULE_ID;
Description
Power Module ID
This enumeration identifies the Power modules that are available on the microcontroller. This is the superset of all the possible
instances that might be available on a Microchip microcontroller.
Members
Members Description
POWER_ID_0 POWER Module ID
POWER_NUMBER_OF_MODULES Number of available POWER modules.
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Remarks
The caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to
the next.
Not all modules will be available on all microcontrollers. Refer to the "Power-Saving Features" chapter in the specific device data
sheet to determine which modules are supported. The numbers used in the enumeration values will match the numbers provided
in the data sheet.
5.6.18.6.4 Feature Existence Functions
5.6.18.6.4.1 PLIB_POWER_ExistsDeepSleepBOR Function
C
bool PLIB_POWER_ExistsDeepSleepBOR(
POWER_MODULE_ID index
);
Description
This function identifies whether the DeepSleepBORControl feature is available on the POWER module. When this function
returns true, these functions are supported on the device:
• PLIB_POWER_DeepSleepBOREnable
• PLIB_POWER_DeepSleepBORDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DeepSleepBORControl feature is supported on the device
• false - The DeepSleepBORControl feature is not supported on the device
Remarks
None.
5.6.18.6.4.2 PLIB_POWER_ExistsDeepSleepFaultDetect Function
C
bool PLIB_POWER_ExistsDeepSleepFaultDetect(
POWER_MODULE_ID index
);
Description
This function identifies whether the DeepSleepFaultDetectStatus feature is available on the POWER module. When this function
returns true, these functions are supported on the device:
• PLIB_POWER_DeepSleepFaultDetectStatus
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DeepSleepFaultDetectStatus feature is supported on the device
• false - The DeepSleepFaultDetectStatus feature is not supported on the device
Remarks
None.
5.6.18.6.4.3 PLIB_POWER_ExistsDeepSleepInterruptOnChange Function
C
bool PLIB_POWER_ExistsDeepSleepInterruptOnChange(
POWER_MODULE_ID index
);
Description
This function identifies whether the DeepSleepIOCStatus feature is available on the POWER module. When this function returns
true, these functions are supported on the device:
• PLIB_POWER_DeepSleepInterruptOnChangeStatus
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DeepSleepIOCStatus feature is supported on the device
• false - The DeepSleepIOCStatus feature is not supported on the device
Remarks
None.
5.6.18.6.4.4 PLIB_POWER_ExistsDeepSleepMCLREvent Function
C
bool PLIB_POWER_ExistsDeepSleepMCLREvent(
POWER_MODULE_ID index
);
Description
This function identifies whether the DeepSleepMCLRStatus feature is available on the POWER module. When this function
returns true, these functions are supported on the device:
• PLIB_POWER_DeepSleepMCLREventStatus
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DeepSleepMCLRStatus feature is supported on the device
• false - The DeepSleepMCLRStatus feature is not supported on the device
Remarks
None.
5.6.18.6.4.5 PLIB_POWER_ExistsDeepSleepMode Function
C
bool PLIB_POWER_ExistsDeepSleepMode(
POWER_MODULE_ID index
);
Description
This function identifies whether the DeepSleepModeControl feature is available on the POWER module. When this function
returns true, these functions are supported on the device:
• PLIB_POWER_DeepSleepModeEnable
• PLIB_POWER_DeepSleepModeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DeepSleepModeControl feature is supported on the device
• false - The DeepSleepModeControl feature is not supported on the device
Remarks
None.
5.6.18.6.4.6 PLIB_POWER_ExistsDeepSleepPowerOnReset Function
C
bool PLIB_POWER_ExistsDeepSleepPowerOnReset(
POWER_MODULE_ID index
);
Description
This function identifies whether the DeepSleepPORStatus feature is available on the POWER module. When this function
returns true, these functions are supported on the device:
• PLIB_POWER_DeepSleepPowerOnResetStatus
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DeepSleepPORStatus feature is supported on the device
• false - The DeepSleepPORStatus feature is not supported on the device
Remarks
None.
5.6.18.6.4.7 PLIB_POWER_ExistsIdleStatus Function
C
bool PLIB_POWER_ExistsIdleStatus(
POWER_MODULE_ID index
);
Description
This function identifies whether the IdleStatus feature is available on the POWER module. When this function returns true, these
functions are supported on the device:
• PLIB_POWER_DeviceWasInIdleMode
• PLIB_POWER_ClearIdleStatus
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The IdleStatus feature is supported on the device
• false - The IdleStatus feature is not supported on the device
Remarks
None.
5.6.18.6.4.8 PLIB_POWER_ExistsPeripheralModuleControl Function
C
bool PLIB_POWER_ExistsPeripheralModuleControl(
POWER_MODULE_ID index
);
Description
This function identifies whether the PeripheralModuleControl feature is available on the POWER module. When this function
returns true, these functions are supported on the device:
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• PLIB_POWER_PeripheralModuleDisable
• PLIB_POWER_PeripheralModuleEnable
• PLIB_POWER_PeripheralModuleIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PeripheralModuleControl feature is supported on the device
• false - The PeripheralModuleControl feature is not supported on the device
Remarks
None.
5.6.18.6.4.9 PLIB_POWER_ExistsSleepStatus Function
C
bool PLIB_POWER_ExistsSleepStatus(
POWER_MODULE_ID index
);
Description
This function identifies whether the SleepStatus feature is available on the POWER module. When this function returns true,
these functions are supported on the device:
• PLIB_POWER_DeviceWasInSleepMode
• PLIB_POWER_ClearSleepStatus
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SleepStatus feature is supported on the device
• false - The SleepStatus feature is not supported on the device
Remarks
None.
5.6.18.6.4.10 PLIB_POWER_ExistsVoltageRegulatorControl Function
C
bool PLIB_POWER_ExistsVoltageRegulatorControl(
POWER_MODULE_ID index
);
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Description
This function identifies whether the VoltageRegulatorControl feature is available on the POWER module. When this function
returns true, these functions are supported on the device:
• PLIB_POWER_VoltageRegulatorEnable
• PLIB_POWER_VoltageRegulatorDisable
• PLIB_POWER_VoltageRegulatorIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The VoltageRegulatorControl feature is supported on the device
• false - The VoltageRegulatorControl feature is not supported on the device
Remarks
None.
5.6.18.7 Files
Files
Name Description
plib_power.h Defines the Power Peripheral Library interface.
Description
5.6.18.7.1 plib_power.h
Power Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Power Peripheral Library for Microchip microcontrollers. The definitions in this file are for the Power Controller module.
Functions
Name Description
PLIB_POWER_ClearIdleStatus Clears the Idle mode status of the device.
PLIB_POWER_ClearSleepStatus Clear the Sleep mode status bit of the device.
PLIB_POWER_DeepSleepBORDisable Disables the Deep Sleep BOR.
PLIB_POWER_DeepSleepBOREnable Enables the Deep Sleep BOR mode.
PLIB_POWER_DeepSleepFaultDetectStatus Returns the status of Deep Sleep Fault Detect bit.
PLIB_POWER_DeepSleepInterruptOnChangeStatus Returns the status of the Deep Sleep Interrupt-on-Change bit.
PLIB_POWER_DeepSleepMCLREventStatus Returns the status of the Deep Sleep MCLR Event bit.
PLIB_POWER_DeepSleepModeDisable Disables the Deep Sleep mode.
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PLIB_POWER_DeepSleepModeEnable Enables the Deep Sleep mode.
PLIB_POWER_DeepSleepPowerOnResetStatus Returns the status of Deep Sleep Power-on Reset bit.
PLIB_POWER_DeviceWasInIdleMode Returns the Idle mode status of the device.
PLIB_POWER_DeviceWasInSleepMode Returns the Sleep mode status of the device.
PLIB_POWER_ExistsDeepSleepBOR Identifies whether the DeepSleepBORControl feature exists
on the POWER module
PLIB_POWER_ExistsDeepSleepFaultDetect Identifies whether the DeepSleepFaultDetectStatus feature
exists on the POWER module
PLIB_POWER_ExistsDeepSleepInterruptOnChange Identifies whether the DeepSleepIOCStatus feature exists on
the POWER module
PLIB_POWER_ExistsDeepSleepMCLREvent Identifies whether the DeepSleepMCLRStatus feature exists
on the POWER module
PLIB_POWER_ExistsDeepSleepMode Identifies whether the DeepSleepModeControl feature exists
on the POWER module
PLIB_POWER_ExistsDeepSleepPowerOnReset Identifies whether the DeepSleepPORStatus feature exists
on the POWER module
PLIB_POWER_ExistsIdleStatus Identifies whether the IdleStatus feature exists on the
POWER module
PLIB_POWER_ExistsPeripheralModuleControl Identifies whether the PeripheralModuleControl feature
exists on the POWER module
PLIB_POWER_ExistsSleepStatus Identifies whether the SleepStatus feature exists on the
POWER module
PLIB_POWER_ExistsVoltageRegulatorControl Identifies whether the VoltageRegulatorControl feature exists
on the POWER module
PLIB_POWER_PeripheralModuleDisable Disable the power supply for the module selected in the
source.
PLIB_POWER_PeripheralModuleEnable Enable the power supply for the module selected in the
source.
PLIB_POWER_PeripheralModuleIsEnabled Check if selected peripheral is enabled or not
PLIB_POWER_VoltageRegulatorDisable Disables the voltage regulator during Sleep mode.
PLIB_POWER_VoltageRegulatorEnable Enable the voltage regulator during Sleep mode.
PLIB_POWER_VoltageRegulatorIsEnabled Provides the status of the voltage regulator during Sleep
mode.
File Name
plib_power.h
Company
Microchip Technology Inc.
5.6.19 Reset Peripheral Library
5.6.19.1 Introduction
Reset Peripheral Library
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5-2687
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Reset Controller modules on Microchip microcontrollers with a convenient C
language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the
module's registers, thereby hiding differences from one microcontroller variant to another.
Description
Reset Controller Overview
The Reset Controller is a key component of a microcontroller. The Reset Controller gives the reset status of the device at any
point of time.
The following are the key features present on a Reset Controller:
• Reset Source Configuration: Provides the ability to enable and disable a source that may reset the device
• Reset Status: Identifies the source of a reset and clears it
A microcontroller can support one or more of the above reset modes.
Please refer to the the "Resets" chapter in the specific device data sheet to determine the exact set of supported features.
5.6.19.2 Release Notes
MPLAB Harmony Version: v0.70b Reset Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.19.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.6.19.4 Using the Library
This topic describes the basic architecture of the Reset Peripheral Library and provides information and examples on how to use
it.
Description
Interface Header File: plib_reset.h
The interface to the Reset Peripheral Library is defined in the "plib_reset.h" header file, which is included by the "peripheral.h"
peripheral library header file. Any C language source (.c) file that uses the Reset Peripheral Library must include "peripheral.h".
Peripheral Module IDs
Peripheral libraries are indexed to allow a single library to control any number of instances of a peripheral in a single
microcontroller. To support this, the first parameter to each operation in a peripheral library is the module instance ID. The
module instance ID is defined by an enumeration that is defined in the processor-specific header files (included by the library's
interface header). Not all microcontrollers will have all instances of the module listed in this enumeration. Please refer to the
"Resets" chapter in the specific device data sheet for availability.
5.6.19.4.1 Hardware Abstraction Model
This library provides a low-level abstraction of the Reset Controller module on Microchip PIC microcontrollers with a convenient
C language interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
Description
The following figure illustrates the hardware abstraction model for the Reset Peripheral Library.
Hardware Abstraction Model
The Reset Controller receives requests from multiple Reset Sources. The Reset Controller controls the overall operation of
the reset controller.
Source Enable Configuration enables or disables a particular source of reset. Some of the reset sources such as Traps are not
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controlled by the users, whereas others can be user controlled.
Note: Not all features are available on all devices. Refer to the "Resets" chapter in the specific device data sheet for availability
5.6.19.4.2 Library Architecture
This library provides the low-level abstraction of the Reset module available on the Microchip family of microcontrollers with a
convenient C language interface. This topic describes how that abstraction is modeled in the software and introduces the library
interface.
The library interface routines are divided into various subsections, each of the subsection addresses one of the blocks or the
overall operation of the Reset Controller module.
Library Interface Section Description
Initialization Functions This section provides a set of functions for configuring and enabling a reset.
Status Functions This section provides a function to read the status of a particular reset.
Note: Not all modes are available on all devices. Refer to the "Resets" chapter in the specific device data sheet for availability.
5.6.19.4.3 How the Library Works
Initialization
The steps that are required to initialize the Reset Controller module vary for different microcontrollers. Refer to the "Resets"
chapter in the specific device data sheet for the correct initialization sequence. The following information provides a general
overview.
Description
Reset Source Setup
Some reset sources need to be enabled for it to be able to Reset the device. Use the function
PLIB_RESET_SoftwareResetEnable to enable the reset source.
Reset Status
The status of the reset indicates which source generated the reset. The status of the reset source can be obtained using the
function PLIB_RESET_ReasonGet. The reason for the reset can be cleared using the function PLIB_RESET_ReasonClear.
5.6.19.5 Configuring the Library
The library is configured for the supported Reset Controller modules when the processor is chosen in the MPLAB IDE.
5.6.19.6 Library Interface
Data Types and Constants
Name Description
RESET_MODULE_ID Identifies the supported Reset modules.
RESET_CONFIG_REG_READ_ERROR Lists the reset sources.
RESET_NMI_COUNT_TYPE Defines NMI counter data type
RESET_NMI_REASON Lists the NMI reasons.
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Feature Existence Functions
Name Description
PLIB_RESET_ExistsResetReasonStatus Identifies whether the ResetReasonStatus feature exists on the
RESET module
PLIB_RESET_ExistsSoftwareResetTrigger Identifies whether the SoftwareResetTrigger feature exists on the
RESET module
PLIB_RESET_ExistsConfigRegReadError Identifies whether the ConfigRegReadError feature exists on the
RESET module
PLIB_RESET_ExistsNmiControl Identifies whether the NmiControl feature exists on the RESET module
PLIB_RESET_ExistsNmiCounter Identifies whether the NmiCounter feature exists on the RESET module
PLIB_RESET_ExistsWdtoInSleep Identifies whether the WdtoInSleep feature exists on the RESET
module
Initialization Functions
Name Description
PLIB_RESET_SoftwareResetEnable Enables the software reset.
Status Functions
Name Description
PLIB_RESET_ReasonClear Clears the RCON register.
PLIB_RESET_ReasonGet Returns the reason for a reset.
PLIB_RESET_ConfigRegReadErrorGet Get the Configuration Register Read Error
PLIB_RESET_WdtTimeOutHasOccurredInSleep Returns the state of the device when WDT time-out occurred
Description
This section lists and describes the functions, data types, and constants provided in the Reset Peripheral Library.
5.6.19.6.1 Initialization Functions
5.6.19.6.1.1 PLIB_RESET_SoftwareResetEnable Function
C
void PLIB_RESET_SoftwareResetEnable(
RESET_MODULE_ID index
);
Description
This function enables the software reset. The system unlock sequence, which must be performed to enable this feature, is done
internally in this function.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
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Remarks
This function implements an operation of the SoftwareResetTrigger feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or include the PLIB_RESET_ExistsSoftwareResetTrigger
function in your application to determine whether this feature is available.
Example
PLIB_RESET_SoftwareResetEnable( RESET_ID_0 );
5.6.19.6.2 Status Functions
5.6.19.6.2.1 PLIB_RESET_ReasonClear Function
C
void PLIB_RESET_ReasonClear(
RESET_MODULE_ID index,
RESET_REASON reason
);
Description
This function clears the particular reset bit in the RCON register. Multiple reasons for a reset can be ORed together and given as
an input parameter to clear them simultaneously.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
reason Select the reset type from enum RESET_REASON
Returns
None
Remarks
This function implements an operation of the ResetReasonStatus feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or include the PLIB_RESET_ExistsResetReasonStatus
function in your application to determine whether this feature is available.
Example
PLIB_RESET_ReasonClear( RESET_ID_0, RESET_REASON_MCLR | RESET_REASON_POWERON );
5.6.19.6.2.2 PLIB_RESET_ReasonGet Function
C
RESET_REASON PLIB_RESET_ReasonGet(
RESET_MODULE_ID index
);
Description
This function returns the reason a reset has occurred for the selected device.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
RESET_REASON - Type of reset (when there is more than one reason for a reset, this function will logically OR (bitwise) the
reasons and return the value.
Remarks
This function implements an operation of the ResetReasonStatus feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or include the PLIB_RESET_ExistsResetReasonStatus
function in your application to determine whether this feature is available.
Example
RESET_REASON type;
type = PLIB_RESET_ReasonGet ( RESET_ID_0 );
5.6.19.6.2.3 PLIB_RESET_ConfigRegReadErrorGet Function
C
RESET_CONFIG_REG_READ_ERROR PLIB_RESET_ConfigRegReadErrorGet(
RESET_MODULE_ID index
);
Description
This function gets the Configuration register read error, if any, after the reset
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
RESET_CONFIG_REG_READ_ERROR - Type of Config Register Read Error
Remarks
This function implements an operation of the ConfigRegReadError feature. This feature may not be available on all devices.
Refer to the specific device data sheet to determine availability or include the PLIB_RESET_ExistsConfigRegReadError function
in your application to determine whether this feature is available.
Example
if (PLIB_RESET_ConfigRegReadErrorGet( RESET_ID_0 )== PRIMARY_CONFIG_REG_READ_ERROR )
{
//Do Something
}
5.6.19.6.2.4 PLIB_RESET_WdtTimeOutHasOccurredInSleep Function
C
bool PLIB_RESET_WdtTimeOutHasOccurredInSleep(
RESET_MODULE_ID index
);
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Description
This function returns if device was in sleep or not when WDT time-out event occurred.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
True - device was in sleep mode when WDT time-out occurred False - device was not in sleep mode when WDT time-out
occurred
Remarks
This function implements an operation of the WdtoInSleep feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or include the PLIB_RESET_ExistsWdtoInSleep function in your
application to determine whether this feature is available.
Example
if (PLIB_RESET_WdtTimeOutHasOccurredInSleep( RESET_ID_0 ))
{
//Do Something
}
5.6.19.6.3 Data Types and Constants
5.6.19.6.3.1 RESET_MODULE_ID Enumeration
C
typedef enum {
RESET_ID_0
} RESET_MODULE_ID;
Description
Reset Module ID
This enumeration identifies the Reset modules that are available on the microcontroller. This is the superset of all the possible
instances that might be available on a Microchip microcontroller.
Members
Members Description
RESET_ID_0 RESET Module ID 0
Remarks
Caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to the
next.
Not all modules are available on all devices. Refer to the "Resets" chapter in the specific device data sheet to determine which
modules are supported. The numbers used in the enumeration values will match the numbers given in the data sheet.
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5.6.19.6.3.2 RESET_CONFIG_REG_READ_ERROR Enumeration
C
typedef enum {
RESET_REASON_POWERON,
RESET_REASON_BROWNOUT,
RESET_REASON_WDT_TIMEOUT,
RESET_REASON_SOFTWARE,
RESET_REASON_MCLR,
RESET_REASON_CONFIG_MISMATCH,
RESET_REASON_HIGH_VOLTAGE_DETECT,
PRIMARY_CONFIG_REG_READ_ERROR,
PRIMARY_AND_ALTERNATIVE_CONFIG_REG_READ_ERROR,
NO_CONFIG_REG_READ_ERROR
} RESET_CONFIG_REG_READ_ERROR;
Description
RESET source select enumeration
This enumeration lists the possible reset sources.
Members
Members Description
RESET_REASON_POWERON The last reset was a power on reset
RESET_REASON_BROWNOUT The last reset was a brown out reset
RESET_REASON_WDT_TIMEOUT The last reset was a watch dog timer time-out reset
RESET_REASON_SOFTWARE The last reset was a software reset
RESET_REASON_MCLR The last reset was a master clear(MCLR) reset
RESET_REASON_CONFIG_MISMATCH The last reset was a configuration mismatch reset
RESET_REASON_HIGH_VOLTAGE_DETECT The last reset was high voltage detect reset
PRIMARY_CONFIG_REG_READ_ERROR An error occurred during the read of primary configuration
registers
PRIMARY_AND_ALTERNATIVE_CONFIG_REG_READ_ERROR An error occurred during the read of primary and alternate
configuration register
NO_CONFIG_REG_READ_ERROR No error occurred during the read of configuration registers
Remarks
Not all reset sources exist on all devices. Please refer to the specific device data sheet for availability.
5.6.19.6.3.3 RESET_NMI_COUNT_TYPE Type
C
typedef unsigned char RESET_NMI_COUNT_TYPE;
Description
RESET_NMI_COUNT_TYPE data type
It defines NMI counter data type
5.6.19.6.3.4 RESET_NMI_REASON Enumeration
C
typedef enum {
WDTO_NMI,
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DMTO_NMI,
SOFTWARE_NMI,
CF_NMI,
WDTS_NMI
} RESET_NMI_REASON;
Description
NMI Reason enumeration
This enumeration lists the possible NMI sources.
Members
Members Description
WDTO_NMI Watch Dog Timer time-out has caused NMI
DMTO_NMI Deadman Timer time-out has caused NMI
SOFTWARE_NMI Software trigger has caused NMI
CF_NMI Clock Failure has caused NMI
WDTS_NMI Watch Dog Timer in Sleep has caused NMI
Remarks
Not all NMI sources exist on all devices. Please refer to the specific device data sheet for availability.
5.6.19.6.4 Feature Existence Functions
5.6.19.6.4.1 PLIB_RESET_ExistsResetReasonStatus Function
C
bool PLIB_RESET_ExistsResetReasonStatus(
RESET_MODULE_ID index
);
Description
This function identifies whether the ResetReasonStatus feature is available on the RESET module. When this function returns
true, these functions are supported on the device:
• PLIB_RESET_ReasonGet
• PLIB_RESET_ReasonClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ResetReasonStatus feature is supported on the device
• false - The ResetReasonStatus feature is not supported on the device
Remarks
None.
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5.6.19.6.4.2 PLIB_RESET_ExistsSoftwareResetTrigger Function
C
bool PLIB_RESET_ExistsSoftwareResetTrigger(
RESET_MODULE_ID index
);
Description
This function identifies whether the SoftwareResetTrigger feature is available on the RESET module. When this function returns
true, these functions are supported on the device:
• PLIB_RESET_SoftwareResetEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SoftwareResetTrigger feature is supported on the device
• false - The SoftwareResetTrigger feature is not supported on the device
Remarks
None.
5.6.19.6.4.3 PLIB_RESET_ExistsConfigRegReadError Function
C
bool PLIB_RESET_ExistsConfigRegReadError(
RESET_MODULE_ID index
);
Description
This function identifies whether the ConfigRegReadError feature is available on the RESET module. When this function returns
true, these functions are supported on the device:
• PLIB_RESET_ConfigRegReadErrorGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ConfigRegReadError feature is supported on the device
• false - The ConfigRegReadError feature is not supported on the device
Remarks
None.
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5.6.19.6.4.4 PLIB_RESET_ExistsNmiControl Function
C
bool PLIB_RESET_ExistsNmiControl(
RESET_MODULE_ID index
);
Description
This function identifies whether the NmiControl feature is available on the RESET module. When this function returns true, these
functions are supported on the device:
• PLIB_RESET_NmiReasonGet
• PLIB_RESET_NmiEventTrigger
• PLIB_RESET_NmiEventClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The NmiControl feature is supported on the device
• false - The NmiControl feature is not supported on the device
Remarks
None.
5.6.19.6.4.5 PLIB_RESET_ExistsNmiCounter Function
C
bool PLIB_RESET_ExistsNmiCounter(
RESET_MODULE_ID index
);
Description
This function identifies whether the NmiCounter feature is available on the RESET module. When this function returns true,
these functions are supported on the device:
• PLIB_RESET_NmiCounterValueSet
• PLIB_RESET_NmiCounterValueGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The NmiCounter feature is supported on the device
• false - The NmiCounter feature is not supported on the device
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Remarks
None.
5.6.19.6.4.6 PLIB_RESET_ExistsWdtoInSleep Function
C
bool PLIB_RESET_ExistsWdtoInSleep(
RESET_MODULE_ID index
);
Description
This function identifies whether the WdtoInSleep feature is available on the RESET module. When this function returns true,
these functions are supported on the device:
• PLIB_RESET_WdtTimeOutHasOccurredInSleep
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WdtoInSleep feature is supported on the device
• false - The WdtoInSleep feature is not supported on the device
Remarks
None.
5.6.19.6.5 NMI Events Functions
Functions
Name Description
PLIB_RESET_NmiCounterValueGet Gets the NMI counter value
PLIB_RESET_NmiCounterValueSet Sets the NMI counter
PLIB_RESET_NmiEventClear Clears the NMI event
PLIB_RESET_NmiEventTrigger Triggers the NMI event
PLIB_RESET_NmiReasonGet Returns the reason for NMI
Description
5.6.19.6.5.1 PLIB_RESET_NmiCounterValueGet Function
C
RESET_NMI_COUNT_TYPE PLIB_RESET_NmiCounterValueGet(
RESET_MODULE_ID index
);
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Description
This function returns the NMI Reset counter value
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
nmi_count - NMI counter value
Remarks
This function implements an operation of the NmiCounter feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or include the PLIB_RESET_ExistsNmiCounter function in your
application to determine whether this feature is available.
Example
RESET_NMI_COUNT_TYPE nmi_count;
nmi_count = PLIB_RESET_NmiCounterValueGet( RESET_ID_0);
5.6.19.6.5.2 PLIB_RESET_NmiCounterValueSet Function
C
void PLIB_RESET_NmiCounterValueSet(
RESET_MODULE_ID index,
RESET_NMI_COUNT_TYPE nmi_count
);
Description
This function sets the NMI counter which needs to be expired for WDT or DMT reset
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured nmi_count -NMI counter value
Returns
None
Remarks
This function implements an operation of the NmiCounter feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or include the PLIB_RESET_ExistsNmiCounter function in your
application to determine whether this feature is available.
Example
PLIB_RESET_NmiCounterValueSet( RESET_ID_0, 0x54);
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5.6.19.6.5.3 PLIB_RESET_NmiEventClear Function
C
void PLIB_RESET_NmiEventClear(
RESET_MODULE_ID index,
RESET_NMI_REASON nmi_reason
);
Description
This function clears the Non-Maskable-Interrupt (NMI) event. if WDTO or DMTO NMI event is cleared before NMI counter
reaches zero, then no device reset is asserted.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
nmi_reason sets of reasons which can cause NMI
Returns
None
Remarks
This function implements an operation of the NmiControl feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or include the PLIB_RESET_ExistsNmiControl function in your
application to determine whether this feature is available.
Example
PLIB_RESET_NmiEventClear( RESET_ID_0, WDTO_NMI );
5.6.19.6.5.4 PLIB_RESET_NmiEventTrigger Function
C
void PLIB_RESET_NmiEventTrigger(
RESET_MODULE_ID index,
RESET_NMI_REASON nmi_reason
);
Description
This function triggers the Non-Maskable-Interrupt (NMI). In case of DMT or WDT NMI event, it will also trigger NMI counter to
start the count down.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
nmi_reason sets of reasons which can cause NMI
Returns
None
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Remarks
This function implements an operation of the NmiControl feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or include the PLIB_RESET_ExistsNmiControl function in your
application to determine whether this feature is available.
Example
PLIB_RESET_NmiEventTrigger( RESET_ID_0, WDTO_NMI );
5.6.19.6.5.5 PLIB_RESET_NmiReasonGet Function
C
RESET_NMI_REASON PLIB_RESET_NmiReasonGet(
RESET_MODULE_ID index
);
Description
This function returns the reason which caused the Non-Maskable-Interrupt (NMI)
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
RESET_NMI_REASON - sets of reasons which can cause NMI
Remarks
This function implements an operation of the NmiControl feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or include the PLIB_RESET_ExistsNmiControl function in your
application to determine whether this feature is available.
Example
if (PLIB_RESET_NmiReasonGet( RESET_ID_0 )== WDTO_NMI )
{
//Do Something
}
5.6.19.7 Files
Files
Name Description
plib_reset.h Defines the Reset Peripheral Library interface.
Description
5.6.19.7.1 plib_reset.h
Reset Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
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Reset Peripheral Library for Microchip microcontrollers. The definitions in this file are for the Reset Controller module.
Functions
Name Description
PLIB_RESET_ConfigRegReadErrorGet Get the Configuration Register Read Error
PLIB_RESET_ExistsConfigRegReadError Identifies whether the ConfigRegReadError feature exists on the
RESET module
PLIB_RESET_ExistsNmiControl Identifies whether the NmiControl feature exists on the RESET
module
PLIB_RESET_ExistsNmiCounter Identifies whether the NmiCounter feature exists on the RESET
module
PLIB_RESET_ExistsResetReasonStatus Identifies whether the ResetReasonStatus feature exists on the
RESET module
PLIB_RESET_ExistsSoftwareResetTrigger Identifies whether the SoftwareResetTrigger feature exists on the
RESET module
PLIB_RESET_ExistsWdtoInSleep Identifies whether the WdtoInSleep feature exists on the RESET
module
PLIB_RESET_NmiCounterValueGet Gets the NMI counter value
PLIB_RESET_NmiCounterValueSet Sets the NMI counter
PLIB_RESET_NmiEventClear Clears the NMI event
PLIB_RESET_NmiEventTrigger Triggers the NMI event
PLIB_RESET_NmiReasonGet Returns the reason for NMI
PLIB_RESET_ReasonClear Clears the RCON register.
PLIB_RESET_ReasonGet Returns the reason for a reset.
PLIB_RESET_SoftwareResetEnable Enables the software reset.
PLIB_RESET_WdtTimeOutHasOccurredInSleep Returns the state of the device when WDT time-out occurred
Types
Name Description
RESET_NMI_COUNT_TYPE Defines NMI counter data type
File Name
plib_reset.h
Company
Microchip Technology Inc.
5.6.20 RTCC Peripheral Library
5.6.20.1 Introduction
Real-Time Clock and Calendar (RTCC) Peripheral Library
for
Microchip Microcontrollers
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This module provides real-time clock and calendar functions. The RTCC is intended for applications where accurate time must
be maintained for extended periods with minimum to no intervention from the CPU. The module is optimized for low-power
usage to provide extended battery life while keeping track of time.
Description
The RTCC module is a 100-year clock and calendar with automatic leap year detection. The range of the clock is from 00:00:00
(midnight) on January 1, 2000 to 23:59:59 on December 31, 2099. The hours are available in 24-hour (military time) format. The
clock provides a granularity of one second with half-second visibility to the user.
RTCC Block Diagram
Operating Modes
RTCC Mode
The RTCC module is intended to be clocked by an external real-time clock crystal oscillating at 32.768 kHz. The prescaler
divides the crystal oscillator frequency to produce a 1 Hz frequency for the clock and calendar. The current Date and Time are
stored in a BCD counter. Please refer to the "RTCC" chapter in the specific device data sheet and the related family reference
manual section to learn more about the counter rolls, overflows and carryovers.
Alarm Mode
The RTCC module provides an alarm function that is configurable from a half-second to one year. After the alarm is enabled, the
RTCC module can be configured to repeat the alarm at preconfigured intervals. The indefinite repetition of the alarm is provided
through the Chime feature.
Note: Not all functionality is available on all devices. Please refer the specific device data sheet to determine availability.
5.6.20.2 Release Notes
MPLAB Harmony Version: v0.70b RTCC Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
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Nothing to report in this release.
5.6.20.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.20.4 Using the Library
This topic describes the basic architecture of the RTCC Peripheral Library and provides information and examples on how to use
it.
Interface Header File: plib_rtcc.h
The interface to the RTCC Peripheral Library is defined in the "plib_rtcc.h" header file. Any C language source (.c) file that uses
the RTCC Peripheral Library should include "plib_rtcc.h".
Library File: The RTCC Peripheral Library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for information on how the peripheral interacts with the framework.
5.6.20.4.1 Hardware Abstraction Model
This library provides a low-level abstraction of the RTCC module on the Microchip family of microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
Description
The RTCC peripheral library provides interface routines to interact with the blocks shown in the following diagram.
Hardware Abstraction Model
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The RTCC Control Logic provides the capability to operate the RTCC module in the RTCC and Alarm modes. The control logic
also handles the comparison and the counter increments, which in turn control the alarm generation. This module is also
responsible for the generation of a square wave at the RTCC output pin. In addition, the RTCC module provides the RTCC drift
calibration.
The RTCC Interrupt Logic is primarily used in alarm generation. The various configurations of the alarm and their repetition
period may be defined.
The RTCC Registers store the actual date and time. Separate registers are present for RTCC and alarm functionality.
5.6.20.4.2 Library Usage Model
This section provides an overview of the usage model for the RTCC Peripheral Library.
Description
The following diagram describes the major components of the usage model.
Usage Model
Each of the blocks in the diagram correspond to the library interface section.
Library Interface Section Description
General Functions Provides the setup and configuration of general functionalities in the RTCC
module. This section also covers the drift calibration.
RTCC Mode Functions Provides configuration of the RTCC-related registers. Updating the Date
and Time registers along with reading them accurately is performed.
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Alarm Mode Functions Provides configuration of the Alarm-related registers. Updating the Date
and Time registers along with reading them accurately is performed. In
addition, the rate at which an alarm occurs and the frequency is also
configured in this mode.
5.6.20.4.3 How the Library Works
The usage model for this library is explained in the following sections.
5.6.20.4.3.1 State Machine
This RTCC state machine is provided to give a general idea of the usage model of the peripheral library. Refer to the usage
model for more detailed steps for the scenario that is being used.
Description
The following state machine diagram is for RTCC mode and Alarm Mode during normal operation.
RTCC State Machine
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State Associated Function
Setup and
Initialization
Refer to mode of RTCC for detailed instructions of setup.
Enable Write via
Key Sequence
For RTCC to perform any function, the module has to be enabled via a series of commands in a special
sequence. This is abstracted and is achieved using PLIB_RTCC_WriteEnable.
Enable Access
of RTC
These include the functions needed to set up the RTCC/Alarm, which will be explained in detail in the
following sections.
Wait for Safe
Sync Window
To update the RTCC on-the-fly, a safe window period is available, corresponding to 32 clock cycles called
RTSYNC. Further sections will explain the functionality in greater detail.
Write/Read Date
and Time
The application may read or write the date and time using PLIB_RTCC_WriteRTCDateValueRegister,
PLIB_RTCC_ReadRTCDateValueRegister, among other. These functions are device-specific and may not
exist for all devices.
5.6.20.4.3.2 RTCC Mode Operations
This section describes the RTCC mode of operation of the RTCC module.
Note: Please refer to the "RTCC" chapter in the specific device data sheet or the related family reference manual to determine
which features are supported by your device.
Description
Enabling the RTCC Module for Write Operations
To perform a write to any of the RTCC timer registers the RTCWREN bit must be set. It is recommended that this bit be reset
unless a write operation is specifically required.
A sequence of commands, each varying across processor families must be executed to set the RTCWREN.
Example: Enabling a Write
// Assume Interrupts are disabled.
// Assume the DMA controller is suspended
PLIB_RTCC_WriteEnable(MY_RTCC_INSTANCE);
// where, MY_RTCC_INSTANCE - is a specific instance of the hardware peripheral.
// This API performs the writing of the sequence
// 0xaa996655 and 0x556699aa to the SYSKET in MCU32
// and 0x55 and 0xaa in case of MCU 16 and MCU 8
// This API then sets the RTCWREN.
Updating RTCC Time and Date
1. Turn off the RTCC using the API PLIB_RTCC_Disable.
2. Wait for the sync clock to turn off by reading the status of PLIB_RTCC_ValueRegistersReadSyncBit (This operation may not
be required on all devices).
3. Update the Date and Time registers using PLIB_RTCC_WriteRTCTimeValueRegister and
PLIB_RTCC_WriteRTCDateValueRegister.
4. Turn on the RTCC module using PLIB_RTCC_Enable.
Example: Updating RTCC Time and Date
// Assume Write Enable has been performed correctly
unsigned long time = 0x04153300; // Set time 04 hrs 15 mins and 33 sec
unsinged long date = 0x06102705; // Set date to Friday 27 Oct 2006
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PLIB_RTCC_Disable(MY_RTCC_INSTANCE);
// where, MY_RTCC_INSTANCE - is a specific instance of the hardware peripheral.
while(PLIB_RTCC_ValueRegistersReadSyncBit(MY_RTCC_INSTANCE)); // Wait for clock to turn
off
PLIB_RTCC_WriteRTCTimeValueRegister(MY_RTCC_INSTANCE, time); // Update the Time
PLIB_RTCC_WriteRTCDateValueRegister(MY_RTCC_INSTANCE, date); // Update the Date
PLIB_RTCC_Enable(MY_RTCC_INSTANCE);
Updating RTCC Time and Date using RTSYNC Window
1. Wait for the sync clock to turn off by reading the status of PLIB_RTCC_ValueRegistersReadSyncBit.
2. Update the RTC Date and Time registers using PLIB_RTCC_WriteRTCDateValueRegister and
PLIB_RTCC_WriteRTCTimeValueRegister.
Example: Updating RTCC Time and Date Using RTSYNC Window
// Assume Write Enable has been performed correctly
unsigned long time = 0x04153300; // Set time 04 hrs 15 mins and 33 sec
unsinged long date = 0x06102705; // Set date to Friday 27 Oct 2006
// where, MY_RTCC_INSTANCE - is a specific instance of the hardware peripheral.
//Disable Critical Interrupts here ....
while(PLIB_RTCC_ValueRegistersReadSyncBit(MY_RTCC_INSTANCE)); // Wait for clock to turn
off
PLIB_RTCC_WriteRTCTimeValueRegister(MY_RTCC_INSTANCE, time); // Update the Time
PLIB_RTCC_WriteRTCDateValueRegister(MY_RTCC_INSTANCE, date); // Update the Date
//Enable Critical Interrupts here ....
Updating RTCC Time and Date Using Register Pointers
1. Turn off the RTCC using PLIB_RTCC_Disable.
2. Update the register pointer to point to the accurate registers using PLIB_RTCC_ValueRegisterPointer.
3. Update the RTC Date and Time registers using PLIB_RTCC_ValueWrite.
4. Turn on the RTCC module using PLIB_RTCC_Enable.
Example: Updating RTCC Time and Date Using Register Pointers
// Assume Write Enable has been performed correctly
PLIB_RTCC_Disable(MY_RTCC_INSTANCE);
// where, MY_RTCC_INSTANCE - is a specific instance of the hardware peripheral.
PLIB_RTCC_ValueRegisterPointer(MY_RTCC_INSTANCE, RTCC_REG_YEAR);
PLIB_RTCC_ValueWrite(MY_RTCC_INSTANCE, 0x0007); // Update the Year
PLIB_RTCC_ValueWrite(MY_RTCC_INSTANCE, 0x1028); // Update the Month and Day
PLIB_RTCC_ValueWrite(MY_RTCC_INSTANCE, 0x0110); // Update the Weekday and Hour
PLIB_RTCC_ValueWrite(MY_RTCC_INSTANCE, 0x0000); // Set the minute and second
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PLIB_RTCC_Enable(MY_RTCC_INSTANCE);
5.6.20.4.3.3 Alarm Mode Operations
This section describes the Alarm mode of operation of the RTCC module.
Note: Please refer to the "RTCC" chapter in the specific device data sheet or the related family reference manual to determine
which features are supported by your device.
Description
Configuring the One-Time-Per-Day Alarm
1. Turn off the Alarm and also the chime, alarm repeats, and masks using PLIB_RTCC_AlarmDisable.
2. Wait for the sync clock to turn off by reading the status of PLIB_RTCC_AlarmValueRegistersReadSyncBit (This operation
may not be required on all devices).
3. Update the Alarm Date and Time registers using PLIB_RTCC_WriteAlarmTimeValueRegister and
PLIB_RTCC_WriteAlarmDateValueRegister.
4. Set the alarm mask to every half-second and the repeat counter to zero using PLIB_RTCC_AlarmMaskModeSelect and
PLIB_RTCC_AlarmRepeatCountSet, respectively.
5. Turn on the RTCC Alarm module using PLIB_RTCC_AlarmEnable.
Example: Configuring the One-Time-Per-Day Alarm
// Assume Write Enable has been performed correctly
unsigned long time = 0x04153300; // Set time 04 hrs 15 mins and 33 sec
unsinged long date = 0x06102705; // Set date to Friday 27 Oct 2006
PLIB_RTCC_AlarmDisable(MY_RTCC_INSTANCE);
// where, MY_RTCC_INSTANCE - is a specific instance of the hardware peripheral.
while(PLIB_RTCC_AlarmValueRegistersReadSyncBit(MY_RTCC_INSTANCE)); // Wait for clock to
turn off
PLIB_RTCC_WriteAlarmTimeValueRegister(MY_RTCC_INSTANCE, time); // Update the Time
PLIB_RTCC_WriteAlarmDateValueRegister(MY_RTCC_INSTANCE, date); // Update the Date
PLIB_RTCC_AlarmMaskModeSelect(MY_RTCC_INSTANCE, RTCC_ALARM_EVERY_HALF_SECOND);
PLIB_RTCC_AlarmRepeatCountSet(MY_RTCC_INSTANCE, 0 /*No of repetitions*/ );
PLIB_RTCC_AlarmEnable(MY_RTCC_INSTANCE);
Configuring the Repeat Alarm
1. Turn off the Alarm and also the Chime, alarm repeats, and masks using PLIB_RTCC_AlarmDisable.
2. Wait for the sync clock to turn off by reading the status of PLIB_RTCC_AlarmValueRegistersReadSyncBit (This operation
may not be required on all devices).
3. Update the Alarm Date and Time registers using PLIB_RTCC_WriteAlarmTimeValueRegister and
PLIB_RTCC_WriteAlarmDateValueRegister.
4. Set the alarm mask to every half-second and the repeat counter to 10 using PLIB_RTCC_AlarmMaskModeSelect and
PLIB_RTCC_AlarmRepeatCountSet, respectively.
5. Turn on the RTCC Alarm module using PLIB_RTCC_AlarmEnable.
Example: Configuring the Repeat Alarm
// Assume Write Enable has been performed correctly
unsigned long time = 0x04153300; // Set time 04 hrs 15 mins and 33 sec
unsinged long date = 0x06102705; // Set date to Friday 27 Oct 2006
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PLIB_RTCC_AlarmDisable(MY_RTCC_INSTANCE);
// where, MY_RTCC_INSTANCE - is a specific instance of the hardware peripheral.
while(PLIB_RTCC_AlarmValueRegistersReadSyncBit(MY_RTCC_INSTANCE)); // Wait for clock to
turn off
PLIB_RTCC_WriteAlarmTimeValueRegister(MY_RTCC_INSTANCE, time); // Update the Time
PLIB_RTCC_WriteAlarmDateValueRegister(MY_RTCC_INSTANCE, date); // Update the Date
PLIB_RTCC_AlarmMaskModeSelect(MY_RTCC_INSTANCE, RTCC_ALARM_EVERY_HALF_SECOND);
PLIB_RTCC_AlarmRepeatCountSet(MY_RTCC_INSTANCE, 10 /*No of repetitions*/ );
PLIB_RTCC_AlarmEnable(MY_RTCC_INSTANCE);
Configuring the Indefinite One-Per-Day Alarm
1. Turn off the Alarm and also the Chime, alarm repeats and masks using PLIB_RTCC_AlarmDisable.
2. Wait for the sync clock to turn off by reading the status of PLIB_RTCC_AlarmValueRegistersReadSyncBit (This operation
may not be required on all devices).
3. Update the Alarm Date and Time registers using PLIB_RTCC_WriteAlarmTimeValueRegister and
PLIB_RTCC_WriteAlarmDateValueRegister.
4. Set the alarm mask to every half-second and the repeat counter to 0 using PLIB_RTCC_AlarmMaskModeSelect and
PLIB_RTCC_AlarmRepeatCountSet, respectively.
5. Turn on the RTCC Alarm module using PLIB_RTCC_AlarmEnable and enable chime using PLIB_RTCC_AlarmChimeEnable.
Example: Configuring the Indefinite One-Per-Day Alarm
// Assume Write Enable has been performed correctly
unsigned long time = 0x04153300; // Set time 04 hrs 15 mins and 33 sec
unsinged long date = 0x06102705; // Set date to Friday 27 Oct 2006
PLIB_RTCC_AlarmDisable(MY_RTCC_INSTANCE);
// where, MY_RTCC_INSTANCE - is a specific instance of the hardware peripheral.
while(PLIB_RTCC_AlarmValueRegistersReadSyncBit(MY_RTCC_INSTANCE)); // Wait for clock to
turn off
PLIB_RTCC_WriteAlarmTimeValueRegister(MY_RTCC_INSTANCE, time); // Update the Time
PLIB_RTCC_WriteAlarmDateValueRegister(MY_RTCC_INSTANCE, date); // Update the Date
PLIB_RTCC_AlarmMaskModeSelect(MY_RTCC_INSTANCE, RTCC_ALARM_EVERY_HALF_SECOND);
PLIB_RTCC_AlarmRepeatCountSet(MY_RTCC_INSTANCE, 0 /*No of repetitions*/ );
PLIB_RTCC_AlarmEnable(MY_RTCC_INSTANCE);
PLIB_RTCC_AlarmChimeEnable(MY_RTCC_INSTANCE);
5.6.20.4.3.4 Other Functionality
This section describes the Drift Calibration mode of operation of the RTCC module.
Note: Please refer to the "RTCC" chapter in the specific device data sheet or the related family reference manual to determine
which features are supported by your device.
Description
The real-time crystal input can be calibrated using the periodic auto-adjust feature. When properly calibrated, the RTCC module
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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can provide an error of less than 0.66 seconds per month. Calibration has the ability to eliminate an error of up to 260 ppm.
The calibration is accomplished by finding the number of error clock pulses and writing this value into the calibration bit fields
using PLIB_RTCC_DriftCalibrate.
Drift Calibration
1. Using another timer resource, the user must find the error of the 32.768 kHz crystal.
2. Once the error is known, it must be converted to the number of error clock pulses per minute, as shown by (Ideal
Frequency(32,758) - Measured Frequency) * 60 = Error Clocks Per Minute.
3. If the error is negative, the input to PLIB_RTCC_DriftCalibrate is negative. Likewise, if the error is positive, the input is
positive. The negative and positive values are the actual number of clock pulses to be added or subtracted from the timer
counter per minute.
Example: Configuring the One-Time-Per-Day Alarm
// Assume Write Enable has been performed correctly
// Assume steps 1 and 2 are performed and the error is determined.
int driftValue = 0x3FD // 10 bits Adjustment, -3 in value
int T0,T1;
do
{
T0 = PLIB_RTCC_ReadRTCTimeValueRegister(MY_RTCC_INSTANCE);
T1 = PLIB_RTCC_ReadRTCTimeValueRegister(MY_RTCC_INSTANCE);
// where, MY_RTCC_INSTANCE - is a specific instance of the hardware peripheral.
}while(T0!=T1) //Read Valid Time Value
if((T0 & 0XFF) == 0) // we are at seconds exactly 00, wait for auto adjust
{
while(!PLIB_RTCC_HalfSecondStatusBit(MY_RTCC_INSTANCE));; Wait for the second Half
}
PLIB_RTCC_DriftCalibrate(MY_RTCC_INSTANCE, 0x00); //Clear the calibration
PLIB_RTCC_DriftCalibrate(MY_RTCC_INSTANCE, 0xdriftValue);
5.6.20.4.4 Configuring the Library
The library is configured for the supported RTCC modules when the processor is chosen in the MPLAB IDE.
5.6.20.5 Library Interface
Data Types and Constants
Name Description
RTCC_ALARM_MASK_CONFIGURATION Data type defining the different configurations for the alarm mask bits.
RTCC_MODULE_ID Enumeration: RTCC_MODULE_ID
This enumeration defines number of modules which are available on
the microcontroller. This is the superset of all of the possible instances
that may be available on the Microchip microcontrollers.
Refer to the data sheet to get the correct number of modules defined
for desired microcontroller.
RTCC_VALUE_REGISTER_POINTER Data type defining the different configurations by which the RTCC
Date and Time Registers can be accessed.
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Alarm Mode Functions
Name Description
PLIB_RTCC_AlarmChimeDisable Disables the specific RTCC module's chime.
PLIB_RTCC_AlarmChimeEnable Enables the specific RTCC module's chime.
PLIB_RTCC_AlarmDateGet Returns the contents of the specific RTCC module's Alarm Date register.
PLIB_RTCC_AlarmDateSet Writes to the specific RTCC module's Alarm Date register.
PLIB_RTCC_AlarmDayGet Returns the contents of the Day bits in the specific RTCC module's
Alarm Date register.
PLIB_RTCC_AlarmDaySet Writes to the specific RTCC module's Alarm Date value register.
PLIB_RTCC_AlarmDisable Disables the specific RTCC module's alarm.
PLIB_RTCC_AlarmEnable Enables the specific RTCC module's alarm.
PLIB_RTCC_AlarmHourGet Returns the contents of Hours bits in the specific RTCC module's Alarm
Time register.
PLIB_RTCC_AlarmHourSet The function returns the contents of Hours bits in the specific RTCC
module's Alarm Time register.
PLIB_RTCC_AlarmMaskModeSelect Sets the specific RTCC module's alarm mask Configuration bits.
PLIB_RTCC_AlarmMinuteGet Returns the contents of Minutes bits in the specific RTCC module's
Alarm Time register.
PLIB_RTCC_AlarmMinuteSet Returns the contents of the Minutes bits in the specific RTCC module's
Alarm Time register.
PLIB_RTCC_AlarmMonthGet Returns the contents of the Month bits in the specific RTCC module's
Alarm Date register.
PLIB_RTCC_AlarmMonthSet Writes to the specific RTCC module's Alarm Date register.
PLIB_RTCC_AlarmPulseInitialGet Returns the state of the initial alarm pulse.
PLIB_RTCC_AlarmPulseInitialSet Enables the determination of the initial alarm pulse.
PLIB_RTCC_AlarmRepeatCountGet Reads the specific RTCC module's alarm repeat counter.
PLIB_RTCC_AlarmRepeatCountSet Sets the specific RTCC module's alarm repeat counter.
PLIB_RTCC_AlarmSecondGet Returns the contents of the Seconds bits in the specific RTCC module's
Alarm Time register.
PLIB_RTCC_AlarmSecondSet Returns the contents of Seconds bits in the specific RTCC module's
Alarm Time register.
PLIB_RTCC_AlarmTimeGet Returns the contents of the specific RTCC module's Alarm Time register.
PLIB_RTCC_AlarmTimeSet Writes to the specific RTCC module's Alarm Time register.
PLIB_RTCC_AlarmValueRegisterPointer Sets the specific RTCC module's Alarm register pointer.
PLIB_RTCC_AlarmWeekDayGet Returns the contents of the WeekDay bits in the specific RTCC module's
Alarm Date register.
PLIB_RTCC_AlarmWeekDaySet Writes to the specific RTCC module's Alarm Date register.
Feature Existence Functions
Name Description
PLIB_RTCC_ExistsAlarmChimeControl Identifies whether the AlarmChimeControl feature exists on the RTCC
module.
PLIB_RTCC_ExistsAlarmControl Identifies whether the AlarmControl feature exists on the RTCC module.
PLIB_RTCC_ExistsAlarmDate Identifies whether the AlarmDate feature exists on the RTCC module.
PLIB_RTCC_ExistsAlarmMaskControl Identifies whether the AlarmMaskControl feature exists on the RTCC
module.
PLIB_RTCC_ExistsAlarmPulseInitial Identifies whether the AlarmPulseInitial feature exists on the RTCC
module.
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PLIB_RTCC_ExistsAlarmRepeatControl Identifies whether the AlarmRepeatControl feature exists on the RTCC
module.
PLIB_RTCC_ExistsAlarmSyncronization Identifies whether the AlarmSynchronization feature exists on the RTCC
module.
PLIB_RTCC_ExistsAlarmTime Identifies whether the AlarmTime feature exists on the RTCC module.
PLIB_RTCC_ExistsCalibration Identifies whether the Calibration feature exists on the RTCC module.
PLIB_RTCC_ExistsClockRunning Identifies whether the ClockRunning feature exists on the RTCC module.
PLIB_RTCC_ExistsClockSelect Identifies whether the ClockSelect feature exists on the RTCC module.
PLIB_RTCC_ExistsEnableControl Identifies whether the EnableControl feature exists on the RTCC module.
PLIB_RTCC_ExistsHalfSecond Identifies whether the HalfSecond feature exists on the RTCC module.
PLIB_RTCC_ExistsOutputControl Identifies whether the OutputControl feature exists on the RTCC module.
PLIB_RTCC_ExistsOutputSelect Identifies whether the OutputSelect feature exists on the RTCC module.
PLIB_RTCC_ExistsRTCDate Identifies whether the RTCDateValue feature exists on the RTCC module.
PLIB_RTCC_ExistsRTCTime Identifies whether the RTCTimeValue feature exists on the RTCC module.
PLIB_RTCC_ExistsStopInIdleControl Identifies whether the StopInIdle feature exists on the RTCC module.
PLIB_RTCC_ExistsSynchronization Identifies whether the Synchronization feature exists on the RTCC
module.
PLIB_RTCC_ExistsWriteEnable Identifies whether the WriteEnable feature exists on the RTCC module.
General Functions
Name Description
PLIB_RTCC_ClockOutputDisable Disables the specific RTCC module's output pin.
PLIB_RTCC_ClockOutputEnable Enables the specific RTCC module's output pin.
PLIB_RTCC_ClockRunningStatus Provides the status of the RTCC clock.
Other Functions
Name Description
PLIB_RTCC_ClockSourceSelect Selects the clock source for the RTCC module.
PLIB_RTCC_DriftCalibrateGet Reads the specific RTCC module's drift calibration bits.
PLIB_RTCC_DriftCalibrateSet Sets the specific RTCC module's drift calibration bits.
PLIB_RTCC_HalfSecondStatusGet The function returns the half second status bit.
PLIB_RTCC_OutputSelect Selects which signal will be presented on the RTCC pin
PLIB_RTCC_StopInIdleDisable Continues normal RTCC operation when the device enters Idle mode.
PLIB_RTCC_StopInIdleEnable Disables access to the RTCC module by the Peripheral Bus Clock (PBCLK)
when the CPU enters Idle mode.
RTCC Mode Functions
Name Description
PLIB_RTCC_Disable Disables the specific RTCC module on the device.
PLIB_RTCC_Enable Enables the specific RTCC module on the device.
PLIB_RTCC_WriteDisable Disables writing to the specific RTCC module's value registers.
PLIB_RTCC_WriteEnable Enables writing to the specific RTCC module's value registers.
PLIB_RTCC_RTCDateGet Returns the contents of the specific RTCC module's Date register.
PLIB_RTCC_RTCDateSet Writes to the specific RTCC module's Date register.
PLIB_RTCC_RTCDayGet Returns the contents of the Days bits in the specific RTCC module's Date register.
PLIB_RTCC_RTCDaySet Writes to the specific RTCC module's Date register.
PLIB_RTCC_RTCHourGet Returns the contents of the Hours bits in the specific RTCC module's Time
register.
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PLIB_RTCC_RTCHourSet Writes the contents of the Hours bits in the specific RTCC module's Time register.
PLIB_RTCC_RTCMinuteGet Returns the contents of the Minutes bits in the specific RTCC module's Time
register.
PLIB_RTCC_RTCMinuteSet Writes the contents of Minutes bits in the specific RTCC module's Time register.
PLIB_RTCC_RTCMonthGet Returns the contents of the Months bits in the specific RTCC module's Date
register.
PLIB_RTCC_RTCMonthSet Writes to the specific RTCC module's Date register.
PLIB_RTCC_RTCSecondGet The function returns the contents of the Seconds bits in the specific RTCC
device's Time register.
PLIB_RTCC_RTCSecondSet Writes the contents of Seconds bits in the specific RTCC module's Time register.
PLIB_RTCC_RTCTimeGet Returns the contents of the specific RTCC module's Time register.
PLIB_RTCC_RTCTimeSet Writes to the specific RTCC module's Time register.
PLIB_RTCC_RTCWeekDayGet Returns the contents of the WeekDay bits in the specific RTCC module's Date
register.
PLIB_RTCC_RTCWeekDaySet Writes to the specific RTCC module's Date register.
PLIB_RTCC_RTCYearGet Returns the contents of the Year bits in the specific RTCC module's Date register.
PLIB_RTCC_RTCYearSet Writes to the specific RTCC module's Date register.
Description
This section lists and describes the functions, data types, and constants included in the RTCC Peripheral Library.
5.6.20.5.1 General Functions
5.6.20.5.1.1 PLIB_RTCC_ClockOutputDisable Function
C
void PLIB_RTCC_ClockOutputDisable(
RTCC_MODULE_ID index
);
Description
This function disables the specific RTCC module's output pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the OutputControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsOutputControl in your application to
automatically determine whether this feature is available.
Example
PLIB_RTCC_ClockOutputDisable(RTCC_ID_0);
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5.6.20.5.1.2 PLIB_RTCC_ClockOutputEnable Function
C
void PLIB_RTCC_ClockOutputEnable(
RTCC_MODULE_ID index
);
Description
This function enables the specific RTCC module's output and generates a square wave using either the alarm or the 1 Hz clock
output on the RTCC pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the OutputControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsOutputControl in your application to
automatically determine whether this feature is available.
Example
PLIB_RTCC_ClockOutputEnable(RTCC_ID_0);
5.6.20.5.1.3 PLIB_RTCC_ClockRunningStatus Function
C
bool PLIB_RTCC_ClockRunningStatus(
RTCC_MODULE_ID index
);
Description
This function provides the status of the RTCC clock.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
The status of the RTCC clock.
Remarks
This function implements an operation of the ClockRunning feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsClockRunning in your application to
automatically determine whether this feature is available.
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Example
bool status;
status = PLIB_RTCC_ClockRunningStatus(RTCC_ID_0);
5.6.20.5.2 RTCC Mode Functions
5.6.20.5.2.1 PLIB_RTCC_Disable Function
C
void PLIB_RTCC_Disable(
RTCC_MODULE_ID index
);
Description
This function disables the specific RTCC module on the device.
Preconditions
The RTCC module should be unlocked for writing using the function PLIB_RTCC_WriteEnable before this function is called.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the EnableControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsEnableControl in your application to
automatically determine whether this feature is available.
Example
PLIB_RTCC_Disable(RTCC_ID_0);
5.6.20.5.2.2 PLIB_RTCC_Enable Function
C
void PLIB_RTCC_Enable(
RTCC_MODULE_ID index
);
Description
This function enables the specific RTCC module on the device.
Preconditions
The RTCC module should be unlocked for writing using the function PLIB_RTCC_WriteEnable before this function is called.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
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Remarks
By calling this function, the RTCC pins are controlled by the RTCC module. The RTCC module will continue to function when the
device is held in reset.
This function implements an operation of the EnableControl feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsEnableControl in your application to
automatically determine whether this feature is available.
Example
PLIB_RTCC_Enable(RTCC_ID_0);
5.6.20.5.2.3 PLIB_RTCC_WriteDisable Function
C
void PLIB_RTCC_WriteDisable(
RTCC_MODULE_ID index
);
Description
This function disables writing to the specific RTCC module's value registers.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the WriteEnable feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsWriteEnable in your application to
automatically determine whether this feature is available.
Example
PLIB_RTCC_WriteDisable(RTCC_ID_0);
5.6.20.5.2.4 PLIB_RTCC_WriteEnable Function
C
void PLIB_RTCC_WriteEnable(
RTCC_MODULE_ID index
);
Description
This function enables writing to the specific RTCC module's value registers.
Preconditions
The SYSLOCK unlock sequence must be executed prior to calling this function by calling the PLIB_CORE_SysUnlock function.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the WriteEnable feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsWriteEnable in your application to
automatically determine whether this feature is available.
Example
PLIB_RTCC_WriteEnable(RTCC_ID_0);
5.6.20.5.2.5 PLIB_RTCC_RTCDateGet Function
C
uint32_t PLIB_RTCC_RTCDateGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the specific RTCC module's Date register. Please refer to the specific device data sheet for
the exact s equence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Date register contents.
Remarks
This function implements an operation of the RTCDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Date;
Date = PLIB_RTCC_RTCDateGet(RTCC_ID_0);
5.6.20.5.2.6 PLIB_RTCC_RTCDateSet Function
C
void PLIB_RTCC_RTCDateSet(
RTCC_MODULE_ID index,
uint32_t data
);
Description
The function writes to the specific RTCC module's Date register. Please refer to the specific device data sheet for the exact
sequence of digits.
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Preconditions
Prior to writing to the Date register, an RTCC write must be enabled using the exact sequences required by the device.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the RTCDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCDate in your application to automatically
determine whether this feature is available.
Example
uint32_t data = 0x06102705; //Date = 27 Oct 2006 Friday
PLIB_RTCC_RTCDateSet(RTCC_ID_0, data);
5.6.20.5.2.7 PLIB_RTCC_RTCDayGet Function
C
uint32_t PLIB_RTCC_RTCDayGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the Days bits in the specific RTCC module's Date register. Please refer to the specific device
data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Days bits in the Date register.
Remarks
This function implements an operation of the RTCDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Day;
Day = PLIB_RTCC_RTCDayGet(RTCC_ID_0);
5.6.20.5.2.8 PLIB_RTCC_RTCDaySet Function
C
void PLIB_RTCC_RTCDaySet(
RTCC_MODULE_ID index,
uint32_t day
);
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Description
The function writes to the specific RTCC module's Date register. Please refer to the specific device data sheet for the exact
sequence of digits.
Preconditions
Prior to writing to the Date register, an RTCC write must be enabled using the exact sequences required by the device.
Parameters
Parameters Description
index Identifier for the device instance to be configured
day The BCD value of the day to set in the Date register
Returns
None.
Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the RTCDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Day = 0x27; //Day = 27th of the month
PLIB_RTCC_RTCDaySet(RTCC_ID_0, Day);
5.6.20.5.2.9 PLIB_RTCC_RTCHourGet Function
C
uint32_t PLIB_RTCC_RTCHourGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the Hours bits in the specific RTCC module's Time register. Please refer to the specific
device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
BCD value of the Hours bits in the Time register.
Remarks
This function implements an operation of the RTCTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Hour;
Hour = PLIB_RTCC_RTCHourGet(RTCC_ID_0);
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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5.6.20.5.2.10 PLIB_RTCC_RTCHourSet Function
C
void PLIB_RTCC_RTCHourSet(
RTCC_MODULE_ID index,
uint32_t hour
);
Description
The function writes the contents of the Hours bits in the specific RTCC module's Time register. Please refer to the specific device
data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
hour BCD value to be written to the Hours bits in the Time register
Returns
None
Remarks
This function implements an operation of the RTCTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Hour = 0x04;
PLIB_RTCC_RTCHourSet(RTCC_ID_0, Hour);
5.6.20.5.2.11 PLIB_RTCC_RTCMinuteGet Function
C
uint32_t PLIB_RTCC_RTCMinuteGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the Minutes bits in the specific RTCC module's Time register. Please refer to the specific
device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
BCD value of the Minutes bits in the Time register.
Remarks
This function implements an operation of the RTCTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Minute;
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
5-2722
Minute = PLIB_RTCC_RTCMinuteGet(RTCC_ID_0);
5.6.20.5.2.12 PLIB_RTCC_RTCMinuteSet Function
C
void PLIB_RTCC_RTCMinuteSet(
RTCC_MODULE_ID index,
uint32_t minute
);
Description
The function writes the contents of thes bits in the specific RTCC module's Time register. Please refer to the specific device data
sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
minute BCD value to be written to the Minutes bits in the Time register
Returns
None
Remarks
This function implements an operation of the RTCTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Minute = 0x15;
PLIB_RTCC_RTCMinuteSet(RTCC_ID_0, Minute);
5.6.20.5.2.13 PLIB_RTCC_RTCMonthGet Function
C
uint32_t PLIB_RTCC_RTCMonthGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the Months bits in the specific RTCC module's Date register. Please refer to the specific
device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Months bits in the Date register.
Remarks
This function implements an operation of the RTCDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCDate in your application to automatically
determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
5-2723
Example
uint32_t Month;
Month = PLIB_RTCC_RTCMonthGet(RTCC_ID_0);
5.6.20.5.2.14 PLIB_RTCC_RTCMonthSet Function
C
void PLIB_RTCC_RTCMonthSet(
RTCC_MODULE_ID index,
uint32_t month
);
Description
The function writes to the specific RTCC module's Date register. Please refer to the specific device data sheet for the exact
sequence of digits.
Preconditions
Prior to writing to the Date register, an RTCC write must be enabled using the exact sequences required by the device.
Parameters
Parameters Description
index Identifier for the device instance to be configured
month The BCD value of the month to set in the Date register
Returns
None.
Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the RTCDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Month = 0x10; //Month = October
PLIB_RTCC_RTCMonthSet(RTCC_ID_0, Month);
5.6.20.5.2.15 PLIB_RTCC_RTCSecondGet Function
C
uint32_t PLIB_RTCC_RTCSecondGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the Seconds bits in the specific RTCC module's Time register. Please refer to the specific
device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
BCD value of the Seconds bits in the Time register.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Remarks
This function implements an operation of the RTCTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Second;
Second = PLIB_RTCC_RTCSecondGet(RTCC_ID_0);
5.6.20.5.2.16 PLIB_RTCC_RTCSecondSet Function
C
void PLIB_RTCC_RTCSecondSet(
RTCC_MODULE_ID index,
uint32_t second
);
Description
The function writes the contents of the Seconds bits in the specific RTCC module's Time register. Please refer to the specific
device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
second BCD value to be written to the Seconds bits in the Time register
Returns
None.
Remarks
This function implements an operation of the RTCTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Second = 0x33;
PLIB_RTCC_RTCSecondSet(RTCC_ID_0, Second);
5.6.20.5.2.17 PLIB_RTCC_RTCTimeGet Function
C
uint32_t PLIB_RTCC_RTCTimeGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the specific RTCC module's Time register. Please refer to the specific device data sheet for
the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Returns
Time register contents.
Remarks
This function implements an operation of the RTCTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCTime in your application to automatically
determine whether this feature is available.
Example
uint32_t time;
time = PLIB_RTCC_RTCTimeGet(RTCC_ID_0);
5.6.20.5.2.18 PLIB_RTCC_RTCTimeSet Function
C
void PLIB_RTCC_RTCTimeSet(
RTCC_MODULE_ID index,
uint32_t data
);
Description
The function writes to the specific RTCC module's Time register. Please refer to the specific device data sheet for the exact
sequence of digits.
Preconditions
Prior to writing to the Time register, an RTCC write must be enabled using the exact sequences required by the device.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the RTCTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCTime in your application to automatically
determine whether this feature is available.
Example
uint32_t data = 0x04153300; //Time = 4 hrs 15 mins 33 sec
PLIB_RTCC_RTCTimeSet(RTCC_ID_0, data);
5.6.20.5.2.19 PLIB_RTCC_RTCWeekDayGet Function
C
uint32_t PLIB_RTCC_RTCWeekDayGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the WeekDay bits in the specific RTCC module's Date register. Please refer to the specific
device data sheet for the exact sequence of digits.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
WeekDay field in the Date register.
Remarks
This function implements an operation of the RTCDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCDate in your application to automatically
determine whether this feature is available.
Example
uint32_t WeekDay;
WeekDay = PLIB_RTCC_RTCWeekDayGet(RTCC_ID_0);
5.6.20.5.2.20 PLIB_RTCC_RTCWeekDaySet Function
C
void PLIB_RTCC_RTCWeekDaySet(
RTCC_MODULE_ID index,
uint32_t weekday
);
Description
The function writes to the specific RTCC module's Date register. Please refer to the specific device data sheet for the exact
sequence of digits.
Preconditions
Prior to writing to the Date register, an RTCC write must be enabled using the exact sequences required by the device.
Parameters
Parameters Description
index Identifier for the device instance to be configured
weekday The BCD value of the weekday to set in the Date register
Returns
None.
Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the RTCDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCDate in your application to automatically
determine whether this feature is available.
Example
uint32_t WeekDay = 0x05; //WeekDay = Friday
PLIB_RTCC_RTCWeekDaySet(RTCC_ID_0, WeekDay);
5.6.20.5.2.21 PLIB_RTCC_RTCYearGet Function
C
uint32_t PLIB_RTCC_RTCYearGet(
RTCC_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
5-2727
);
Description
The function returns the contents of the specific RTCC module's Date register. Please refer to the specific device data sheet for
the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Year bits in the Date register.
Remarks
This function implements an operation of the RTCDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Year;
Year = PLIB_RTCC_RTCYearGet(RTCC_ID_0);
5.6.20.5.2.22 PLIB_RTCC_RTCYearSet Function
C
void PLIB_RTCC_RTCYearSet(
RTCC_MODULE_ID index,
uint32_t year
);
Description
The function writes to the specific RTCC module's Date register. Please refer to the specific device data sheet for the exact
sequence of digits.
Preconditions
Prior to writing to the Date register, an RTCC write must be enabled using the exact sequences required by the device.
Parameters
Parameters Description
index Identifier for the device instance to be configured
year The BCD value of the year to set in the Date register
Returns
None.
Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the RTCDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsRTCDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Year = 0x06; //Year = 2006
PLIB_RTCC_RTCYearSet(RTCC_ID_0, Year);
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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5.6.20.5.3 Alarm Mode Functions
5.6.20.5.3.1 PLIB_RTCC_AlarmChimeDisable Function
C
void PLIB_RTCC_AlarmChimeDisable(
RTCC_MODULE_ID index
);
Description
This function disables the specific RTCC module's chime. The alarm repeat count value bits stop once they reach zero.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the AlarmChimeControl feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmChimeControl in your
application to automatically determine whether this feature is available.
Example
PLIB_RTCC_AlarmChimeDisable(RTCC_ID_0);
5.6.20.5.3.2 PLIB_RTCC_AlarmChimeEnable Function
C
void PLIB_RTCC_AlarmChimeEnable(
RTCC_MODULE_ID index
);
Description
This function enables the specific RTCC module's chime. The alarm repeat count bits are allowed to rollover.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the AlarmChimeControl feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmChimeControl in your
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
5-2729
application to automatically determine whether this feature is available.
Example
PLIB_RTCC_AlarmChimeEnable(RTCC_ID_0);
5.6.20.5.3.3 PLIB_RTCC_AlarmDateGet Function
C
uint32_t PLIB_RTCC_AlarmDateGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the specific RTCC module's Alarm Date register. Please refer to the specific device data
sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Value register.
Remarks
This function implements an operation of the AlarmDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Date;
Date = PLIB_RTCC_AlarmDateGet(RTCC_ID_0);
5.6.20.5.3.4 PLIB_RTCC_AlarmDateSet Function
C
void PLIB_RTCC_AlarmDateSet(
RTCC_MODULE_ID index,
uint32_t data
);
Description
The function writes to the specific RTCC module's Alarm Date register. Please refer to the specific device data sheet for the
exact sequence of digits.
Preconditions
Prior to writing to the Alarm Date register, an RTCC write must be enabled using the exact sequences required by the device.
Parameters
Parameters Description
index Identifier for the device instance to be configured
data The value to set the Alarm Date register to, in BCD format
Returns
None.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the AlarmDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmDate in your application to automatically
determine whether this feature is available.
Example
uint32_t data = 0x06102705; //Date = 27 Oct 2006 Friday
PLIB_RTCC_AlarmDateSet(RTCC_ID_0, data);
5.6.20.5.3.5 PLIB_RTCC_AlarmDayGet Function
C
uint32_t PLIB_RTCC_AlarmDayGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of Day bits in the specific RTCC module's Alarm Date register. Please refer to the specific
device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Days bits in the Alarm Date register.
Remarks
This function implements an operation of the AlarmDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Day;
Day = PLIB_RTCC_AlarmDayGet(RTCC_ID_0);
5.6.20.5.3.6 PLIB_RTCC_AlarmDaySet Function
C
void PLIB_RTCC_AlarmDaySet(
RTCC_MODULE_ID index,
uint32_t day
);
Description
The function writes to the specific RTCC module's Alarm Date register. Please refer to the specific device data sheet for the
exact sequence of digits.
Preconditions
Prior to writing to the Alarm Date register, an RTCC write must be enabled using the exact sequences required by the device.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
day The BCD value of the day to set in the Alarm Date register
Returns
None.
Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the AlarmDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Day = 0x27; //Day = 27th of the month
PLIB_RTCC_AlarmDaySet(RTCC_ID_0, Day);
5.6.20.5.3.7 PLIB_RTCC_AlarmDisable Function
C
void PLIB_RTCC_AlarmDisable(
RTCC_MODULE_ID index
);
Description
This function disables the specific RTCC module's alarm.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the AlarmControl feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmControl in your application to
automatically determine whether this feature is available.
Example
PLIB_RTCC_AlarmDisable(RTCC_ID_0);
5.6.20.5.3.8 PLIB_RTCC_AlarmEnable Function
C
void PLIB_RTCC_AlarmEnable(
RTCC_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
5-2732
Description
This function enables the specific RTCC module's alarm.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
The alarm enable bit is cleared automatically after an alarm event whenever the alarm is not set up to repeat, and chime is
disabled.
This function implements an operation of the AlarmControl feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmControl in your application to
automatically determine whether this feature is available.
Example
PLIB_RTCC_AlarmEnable(RTCC_ID_0);
5.6.20.5.3.9 PLIB_RTCC_AlarmHourGet Function
C
uint32_t PLIB_RTCC_AlarmHourGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the Hours bits in the specific RTCC module's Alarm Time register. Please refer to the
specific device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
BCD value of the Hours bits in the Alarm Time register.
Remarks
This function implements an operation of the AlarmTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Hour;
Hour = PLIB_RTCC_AlarmHourGet(RTCC_ID_0);
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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5.6.20.5.3.10 PLIB_RTCC_AlarmHourSet Function
C
void PLIB_RTCC_AlarmHourSet(
RTCC_MODULE_ID index,
uint32_t hour
);
Description
Returns the contents of the Hours bits in the specific RTCC module's Alarm Time register. Please refer to the specific device
data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
hour BCD value to be written to the Hours bits in the Alarm Time register
Returns
None
Remarks
This function implements an operation of the AlarmTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Hour = 0x04;
PLIB_RTCC_AlarmHourSet(RTCC_ID_0, Hour);
5.6.20.5.3.11 PLIB_RTCC_AlarmMaskModeSelect Function
C
void PLIB_RTCC_AlarmMaskModeSelect(
RTCC_MODULE_ID index,
RTCC_ALARM_MASK_CONFIGURATION data
);
Description
This function sets the specific RTCC module's alarm mask Configuration bits.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
data Alarm mask Configuration bits
Returns
None.
Remarks
The actual definition of this enumeration is device-specific.
This function implements an operation of the AlarmMaskControl feature. This feature may not be available on all devices. Please
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmMaskControl in your application
to automatically determine whether this feature is available.
Example
uint8_t data = 0;
PLIB_RTCC_AlarmMaskModeSelect(RTCC_ID_0, RTCC_ALARM_EVERY_HALF_SECOND);
5.6.20.5.3.12 PLIB_RTCC_AlarmMinuteGet Function
C
uint32_t PLIB_RTCC_AlarmMinuteGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the field in the specific RTCC module's Alarm Time register. Please refer to the specific
device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
BCD value of the Minutes bits in the Alarm Time register.
Remarks
This function implements an operation of the AlarmTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Minute;
Minute = PLIB_RTCC_AlarmMinuteGet(RTCC_ID_0);
5.6.20.5.3.13 PLIB_RTCC_AlarmMinuteSet Function
C
void PLIB_RTCC_AlarmMinuteSet(
RTCC_MODULE_ID index,
uint32_t minute
);
Description
The function returns the contents of the Minutes bits in the specific RTCC module's Alarm Time register. Please refer to the
specific device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
minute BCD value to be written to the Minutes bits in the Alarm Time register
Returns
None
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Remarks
This function implements an operation of the AlarmTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Minute = 0x15;
PLIB_RTCC_AlarmMinuteSet(RTCC_ID_0, Minute);
5.6.20.5.3.14 PLIB_RTCC_AlarmMonthGet Function
C
uint32_t PLIB_RTCC_AlarmMonthGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the Months bits in the specific RTCC module's Alarm Date register. Please refer to the
specific device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Months bits in the Date register.
Remarks
This function implements an operation of the AlarmDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Month;
Month = PLIB_RTCC_AlarmMonthGet(RTCC_ID_0);
5.6.20.5.3.15 PLIB_RTCC_AlarmMonthSet Function
C
void PLIB_RTCC_AlarmMonthSet(
RTCC_MODULE_ID index,
uint32_t month
);
Description
The function writes to the specific RTCC module's Alarm Date register. Please refer to the specific device data sheet for the
exact sequence of digits.
Preconditions
Prior to writing to the Alarm Date register, an RTCC write must be enabled using the exact sequences required by the device.
Parameters
Parameters Description
index Identifier for the device instance to be configured
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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month The BCD value of the month to set in the Alarm Date register
Returns
None.
Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the AlarmDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmDate in your application to automatically
determine whether this feature is available.
Example
uint32_t Month = 0x10; //Month = October
PLIB_RTCC_AlarmMonthSet(RTCC_ID_0, Month);
5.6.20.5.3.16 PLIB_RTCC_AlarmPulseInitialGet Function
C
bool PLIB_RTCC_AlarmPulseInitialGet(
RTCC_MODULE_ID index
);
Description
This function returns the state of the initial alarm pulse.
Preconditions
The ALRMEN bit should be '1' indicating the PLIB_RTCC_AlarmEnable function was called.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
1 - Logical High 0 - Logical Low
Remarks
This function implements an operation of the AlarmPulseInitial feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmPulseInitial in your application to
automatically determine whether this feature is available.
Example
bool PulseValue;
PulseValue = PLIB_RTCC_AlarmPulseInitialGet(RTCC_ID_0);
5.6.20.5.3.17 PLIB_RTCC_AlarmPulseInitialSet Function
C
void PLIB_RTCC_AlarmPulseInitialSet(
RTCC_MODULE_ID index,
bool data
);
Description
This function enables the determination of initial alarm pulse.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Preconditions
The ALRMEN bit should be '0' indicating the PLIB_RTCC_AlarmDisable was called. This function must not be called when the
RTCC is ON and the Alarm Sync is 1.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the AlarmPulseInitial feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmPulseInitial in your application to
automatically determine whether this feature is available.
Example
bool data = 0;
PLIB_RTCC_AlarmPulseInitialSet(RTCC_ID_0, data);
5.6.20.5.3.18 PLIB_RTCC_AlarmRepeatCountGet Function
C
uint8_t PLIB_RTCC_AlarmRepeatCountGet(
RTCC_MODULE_ID index
);
Description
This function reads the specific RTCC module's alarm repeat counter.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
uint8_t - The current value of the alarm repeat counter
Remarks
The counter decrements on any alarm event. The counter is prevented from rolling over unless chime is enabled.
This function implements an operation of the AlarmRepeatControl feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmRepeatControl in your
application to automatically determine whether this feature is available.
Example
uint8_t currentCount;
currentCount = PLIB_RTCC_AlarmRepeatCountGet(RTCC_ID_0);
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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5.6.20.5.3.19 PLIB_RTCC_AlarmRepeatCountSet Function
C
void PLIB_RTCC_AlarmRepeatCountSet(
RTCC_MODULE_ID index,
uint8_t data
);
Description
This function sets the specific RTCC module's alarm repeat counter.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
data Alarm repeat counter bits
Returns
None.
Remarks
The counter decrements on any alarm event. The counter is prevented from rolling over unless chime is enabled.
This function implements an operation of the AlarmRepeatControl feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmRepeatControl in your
application to automatically determine whether this feature is available.
Example
uint8_t data = 0xFF;
PLIB_RTCC_AlarmRepeatCountSet(RTCC_ID_0, data);
5.6.20.5.3.20 PLIB_RTCC_AlarmSecondGet Function
C
uint32_t PLIB_RTCC_AlarmSecondGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the Seconds bits in the specific RTCC module's Alarm Time register. Please refer to the
specific device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
BCD value of the Seconds bits in the Alarm Time register.
Remarks
This function implements an operation of the AlarmTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmTime in your application to automatically
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
5-2739
determine whether this feature is available.
Example
uint32_t Second;
Second = PLIB_RTCC_AlarmSecondGet(RTCC_ID_0);
5.6.20.5.3.21 PLIB_RTCC_AlarmSecondSet Function
C
void PLIB_RTCC_AlarmSecondSet(
RTCC_MODULE_ID index,
uint32_t second
);
Description
The function returns the contents of the field in the specific RTCC module's Alarm Time register. Please refer to the specific
device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
second BCD value to be written to the Seconds bits in the Alarm Time register
Returns
None
Remarks
This function implements an operation of the AlarmTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmTime in your application to automatically
determine whether this feature is available.
Example
uint32_t Second = 0x33;
PLIB_RTCC_AlarmSecondSet(RTCC_ID_0, Second);
5.6.20.5.3.22 PLIB_RTCC_AlarmTimeGet Function
C
uint32_t PLIB_RTCC_AlarmTimeGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of the specific RTCC module's Alarm Time register. Please refer to the specific device data
sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Value register.
Remarks
This function implements an operation of the AlarmTime feature. This feature may not be available on all devices. Please refer to
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
5-2740
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmTime in your application to automatically
determine whether this feature is available.
Example
uint32_t time;
time = PLIB_RTCC_AlarmTimeGet(RTCC_ID_0);
5.6.20.5.3.23 PLIB_RTCC_AlarmTimeSet Function
C
void PLIB_RTCC_AlarmTimeSet(
RTCC_MODULE_ID index,
uint32_t data
);
Description
The function writes to the specific RTCC module's Alarm Time register. Please refer to the specific device data sheet for the
exact sequence of digits.
Preconditions
Prior to writing to the Alarm Time register, an RTCC write must be enabled using the exact sequences required by the device.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the AlarmTime feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmTime in your application to automatically
determine whether this feature is available.
Example
uint32_t data = 0x04153300; //Time = 4 hrs 15 mins 33 sec
PLIB_RTCC_AlarmTimeSet(RTCC_ID_0, data);
5.6.20.5.3.24 PLIB_RTCC_AlarmValueRegisterPointer Function
C
void PLIB_RTCC_AlarmValueRegisterPointer(
RTCC_MODULE_ID index,
uint8_t data
);
Description
This function sets the specific RTCC module's Alarm register pointer.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
data Alarm register pointer
Returns
None.
Remarks
None.
Example
uint8_t data = 2;
PLIB_RTCC_AlarmValueRegisterPointer(RTCC_ID_0, data);
5.6.20.5.3.25 PLIB_RTCC_AlarmWeekDayGet Function
C
uint32_t PLIB_RTCC_AlarmWeekDayGet(
RTCC_MODULE_ID index
);
Description
The function returns the contents of Weekday bits in the specific RTCC module's Alarm Date register. Please refer to the specific
device data sheet for the exact sequence of digits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
WeekDay bits in the Alarm Date register.
Remarks
This function implements an operation of the AlarmDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmDate in your application to automatically
determine whether this feature is available.
Example
uint32_t WeekDay;
WeekDay = PLIB_RTCC_AlarmWeekDayGet(RTCC_ID_0);
5.6.20.5.3.26 PLIB_RTCC_AlarmWeekDaySet Function
C
void PLIB_RTCC_AlarmWeekDaySet(
RTCC_MODULE_ID index,
uint32_t weekday
);
Description
The function writes to the specific RTCC module's Alarm Date register. Please refer to the specific device data sheet for the
exact sequence of digits.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Preconditions
Prior to writing to the Alarm Date register, an RTCC write must be enabled using the exact sequences required by the device.
Parameters
Parameters Description
index Identifier for the device instance to be configured
weekday The BCD value of the weekday to set in the field of the Alarm Date register
Returns
None.
Remarks
A write to this register is only allowed when access is allowed by using the PLIB_RTCC_WriteEnable function.
This function implements an operation of the AlarmDate feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsAlarmDate in your application to automatically
determine whether this feature is available.
Example
uint32_t WeekDay = 0x05; //WeekDay = Friday
PLIB_RTCC_AlarmWeekDaySet(RTCC_ID_0, WeekDay);
5.6.20.5.4 Other Functions
5.6.20.5.4.1 PLIB_RTCC_ClockSourceSelect Function
C
void PLIB_RTCC_ClockSourceSelect(
RTCC_MODULE_ID index,
RTCC_CLOCK_SOURCE_SELECT source
);
Description
This function determines which clock source the RTCC module will use depending on the features of the device.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
source Which clock source will be used
Returns
None.
Remarks
This function implements an operation of the ClockSelect feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsClockSelect in your application to
automatically determine whether this feature is available.
Example
PLIB_RTCC_ClockSourceSelect(RTCC_ID_0, RTCC_CLOCK_SOURCE_SELECT_NONE);
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5.6.20.5.4.2 PLIB_RTCC_DriftCalibrateGet Function
C
uint16_t PLIB_RTCC_DriftCalibrateGet(
RTCC_MODULE_ID index
);
Description
This function reads the specific RTCC module's drift calibration bits.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
uint16_t - The current drift calibration value
Remarks
This function implements an operation of the Calibration feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCalibration in your application to automatically
determine whether this feature is available.
Example
uint16_t calibrationbits;
calibrationbits = PLIB_RTCC_DriftCalibrateGet(RTCC_ID_0);
5.6.20.5.4.3 PLIB_RTCC_DriftCalibrateSet Function
C
void PLIB_RTCC_DriftCalibrateSet(
RTCC_MODULE_ID index,
uint16_t calibrationbits
);
Description
This function sets the specific RTCC module's drift calibration bits. The error between the system clock and the external clock
has to be computed and calibration input must be provided to this function.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
calibrationbits Drift calibration bits
Returns
None.
Remarks
This function implements an operation of the Calibration feature. This feature may not be available on all devices. Please refer to
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
5-2744
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsCalibration in your application to automatically
determine whether this feature is available.
Example
uint16_t calibrationbits = 3; //Positive 3 adjustment derived from the formula
// Error = (Ideal Freq(32758) - Measured)*60;
PLIB_RTCC_DriftCalibrateSet(RTCC_ID_0, calibrationbits);
5.6.20.5.4.4 PLIB_RTCC_HalfSecondStatusGet Function
C
bool PLIB_RTCC_HalfSecondStatusGet(
RTCC_MODULE_ID index
);
Description
The function returns the half second status bit, which is used in the calibration procedure. When the seconds byte is zero, the
calibration value must be updated when the half second bit becomes '1'.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Second half period of a second
• false - First half period of a second
Remarks
This bit is read-only. It is cleared to '0' on a write to the seconds value. This function implements an operation of the HalfSecond
feature. This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability
or use PLIB_RTCC_ExistsHalfSecond in your application to automatically determine whether this feature is available.
Example
// Wait for the half second status bit to be '1'.
while(PLIB_RTCC_HalfSecondStatusGet(RTCC_ID_0));
5.6.20.5.4.5 PLIB_RTCC_OutputSelect Function
C
void PLIB_RTCC_OutputSelect(
RTCC_MODULE_ID index,
RTCC_OUTPUT_SELECT data
);
Description
This function selects which signal will be presented on the RTCC pin.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
data Enumerated value of which signal to present
Returns
None.
Remarks
The RTCC module's output pin should be enabled using the function PLIB_RTCC_OutputEnable.
This function implements an operation of the OutputSelect feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use PLIB_RTCC_ExistsOutputSelect in your application to
automatically determine whether this feature is available.
Example
PLIB_RTCC_OutputSelect(RTCC_ID_0, RTCC_OUTPUT_SECONDS_CLOCK);
5.6.20.5.4.6 PLIB_RTCC_StopInIdleDisable Function
C
void PLIB_RTCC_StopInIdleDisable(
RTCC_MODULE_ID index
);
Description
This function continues normal RTCC operation when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
This function implements an operation of the StopInIdle feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsStopInIdle in your application to automatically
determine whether this feature is available.
Example
PLIB_RTCC_StopInIdleDisable(RTCC_ID_0);
5.6.20.5.4.7 PLIB_RTCC_StopInIdleEnable Function
C
void PLIB_RTCC_StopInIdleEnable(
RTCC_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
5-2746
Description
This function disables access to the RTCC module by the PBCLK when the CPU is in Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the StopInIdle feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use PLIB_RTCC_ExistsStopInIdle in your application to automatically
determine whether this feature is available.
Example
PLIB_RTCC_StopInIdleEnable(RTCC_ID_0);
5.6.20.5.5 Data Types and Constants
5.6.20.5.5.1 RTCC_ALARM_MASK_CONFIGURATION Enumeration
C
typedef enum {
RTCC_ALARM_EVERY_HALF_SECOND,
RTCC_ALARM_EVERY_SECOND,
RTCC_ALARM_EVERY_10_SECONDS,
RTCC_ALARM_EVERY_MINUTE,
RTCC_ALARM_EVERY_10_MINUTES,
RTCC_ALARM_EVERY_HOUR,
RTCC_ALARM_ONCE_A_DAY,
RTCC_ALARM_ONCE_A_WEEK,
RTCC_ALARM_ONCE_A_MONTH,
RTCC_ALARM_ONCE_A_YEAR
} RTCC_ALARM_MASK_CONFIGURATION;
Description
Alarm Mask Configuration
This data type defines the different configurations for accessing the alarm mask Configuration bits.
Members
Members Description
RTCC_ALARM_EVERY_HALF_SECOND Alarm every half second
RTCC_ALARM_EVERY_SECOND Alarm every second
RTCC_ALARM_EVERY_10_SECONDS Alarm every 10 seconds
RTCC_ALARM_EVERY_MINUTE Alarm every minute
RTCC_ALARM_EVERY_10_MINUTES Alarm every 10 minutes
RTCC_ALARM_EVERY_HOUR Alarm every hour
RTCC_ALARM_ONCE_A_DAY Alarm every day
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5-2747
RTCC_ALARM_ONCE_A_WEEK Alarm every week
RTCC_ALARM_ONCE_A_MONTH Alarm every month
RTCC_ALARM_ONCE_A_YEAR Alarm every year
Remarks
The actual definition of this enumeration is device-specific.
5.6.20.5.5.2 RTCC_MODULE_ID Enumeration
C
typedef enum {
RTCC_ID_1,
RTCC_NUMBER_OF_MODULES
} RTCC_MODULE_ID;
Description
Enumeration: RTCC_MODULE_ID
This enumeration defines number of modules which are available on the microcontroller. This is the superset of all of the
possible instances that may be available on the Microchip microcontrollers.
Refer to the data sheet to get the correct number of modules defined for desired microcontroller.
Members
Members Description
RTCC_NUMBER_OF_MODULES The total number of modules available.
5.6.20.5.5.3 RTCC_VALUE_REGISTER_POINTER Enumeration
C
typedef enum {
RTCC_REG_YEAR,
RTCC_REG_DAY_MONTH,
RTCC_REG_HOURS_WEEKDAY,
RTCC_REG_MINUTES_SECONDS
} RTCC_VALUE_REGISTER_POINTER;
Description
Value Register Pointer
This data type defines the different configurations by which the RTCC Date and Time Registers can be accessed.
Members
Members Description
RTCC_REG_YEAR The year register is being pointed
RTCC_REG_DAY_MONTH The day and month register is being pointed
RTCC_REG_HOURS_WEEKDAY The hours and weekday register is being pointed
RTCC_REG_MINUTES_SECONDS The minutes and seconds register is being pointed
Remarks
The actual definition of this enumeration is device-specific.
5.6.20.5.6 Feature Existence Functions
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
5-2748
5.6.20.5.6.1 PLIB_RTCC_ExistsAlarmChimeControl Function
C
bool PLIB_RTCC_ExistsAlarmChimeControl(
RTCC_MODULE_ID index
);
Description
This function identifies whether the AlarmChimeControl feature is available on the RTCC module. When this interface returns
true, these functions are supported on the device:
• PLIB_RTCC_AlarmChimeEnable
• PLIB_RTCC_AlarmChimeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlarmChimeControl feature is supported on the device
• false - The AlarmChimeControl feature is not supported on the device
Remarks
None.
5.6.20.5.6.2 PLIB_RTCC_ExistsAlarmControl Function
C
bool PLIB_RTCC_ExistsAlarmControl(
RTCC_MODULE_ID index
);
Description
This function identifies whether the AlarmControl feature is available on the RTCC module. When this interface returns true,
these functions are supported on the device:
• PLIB_RTCC_AlarmEnable
• PLIB_RTCC_AlarmDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlarmControl feature is supported on the device
• false - The AlarmControl feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Remarks
None.
5.6.20.5.6.3 PLIB_RTCC_ExistsAlarmDate Function
C
bool PLIB_RTCC_ExistsAlarmDate(
RTCC_MODULE_ID index
);
Description
This function identifies whether the AlarmDate feature is available on the RTCC module. When this interface returns true, these
functions are supported on the device:
• PLIB_RTCC_AlarmDateGet
• PLIB_RTCC_AlarmDateSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlarmDate feature is supported on the device
• false - The AlarmDate feature is not supported on the device
Remarks
None.
5.6.20.5.6.4 PLIB_RTCC_ExistsAlarmMaskControl Function
C
bool PLIB_RTCC_ExistsAlarmMaskControl(
RTCC_MODULE_ID index
);
Description
This function identifies whether the AlarmMaskControl feature is available on the RTCC module. When this interface returns true,
these functions are supported on the device:
• PLIB_RTCC_AlarmMaskModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlarmMaskControl feature is supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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• false - The AlarmMaskControl feature is not supported on the device
Remarks
None.
5.6.20.5.6.5 PLIB_RTCC_ExistsAlarmPulseInitial Function
C
bool PLIB_RTCC_ExistsAlarmPulseInitial(
RTCC_MODULE_ID index
);
Description
This function identifies whether the AlarmPulseInitialValue feature is available on the RTCC module. When this interface returns
true, these functions are supported on the device:
• PLIB_RTCC_AlarmPulseInitialSet
• PLIB_RTCC_AlarmPulseInitialGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlarmPulseInitial feature is supported on the device
• false - The AlarmPulseInitial feature is not supported on the device
Remarks
None.
5.6.20.5.6.6 PLIB_RTCC_ExistsAlarmRepeatControl Function
C
bool PLIB_RTCC_ExistsAlarmRepeatControl(
RTCC_MODULE_ID index
);
Description
This function identifies whether the AlarmRepeatControl feature is available on the RTCC module. When this interface returns
true, these functions are supported on the device:
• PLIB_RTCC_AlarmRepeatCountSet
• PLIB_RTCC_AlarmRepeatCountRead
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Returns
• true - The AlarmRepeatControl feature is supported on the device
• false - The AlarmRepeatControl feature is not supported on the device
Remarks
None.
5.6.20.5.6.7 PLIB_RTCC_ExistsAlarmSyncronization Function
C
bool PLIB_RTCC_ExistsAlarmSyncronization(
RTCC_MODULE_ID index
);
Description
This function identifies whether the AlarmSynchronization feature is available on the RTCC module. When this interface returns
true, these functions are supported on the device:
• PLIB_RTCC_AlarmReadSyncBit
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlarmSynchronization feature is supported on the device
• false - The AlarmSynchronization feature is not supported on the device
Remarks
None.
5.6.20.5.6.8 PLIB_RTCC_ExistsAlarmTime Function
C
bool PLIB_RTCC_ExistsAlarmTime(
RTCC_MODULE_ID index
);
Description
This function identifies whether the AlarmTime feature is available on the RTCC module. When this interface returns true, these
functions are supported on the device:
• PLIB_RTCC_AlarmTimeGet
• PLIB_RTCC_AlarmTimeSet
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AlarmTime feature is supported on the device
• false - The AlarmTime feature is not supported on the device
Remarks
None.
5.6.20.5.6.9 PLIB_RTCC_ExistsCalibration Function
C
bool PLIB_RTCC_ExistsCalibration(
RTCC_MODULE_ID index
);
Description
This function identifies whether the Calibration feature is available on the RTCC module. When this interface returns true, this
function is supported on the device:
• PLIB_RTCC_DriftCalibrate
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Calibration feature is supported on the device
• false - The Calibration feature is not supported on the device
Remarks
None.
5.6.20.5.6.10 PLIB_RTCC_ExistsClockRunning Function
C
bool PLIB_RTCC_ExistsClockRunning(
RTCC_MODULE_ID index
);
Description
This function identifies whether the ClockRunning feature is available on the RTCC module. When this interface returns true, this
function is supported on the device:
• PLIB_RTCC_ClockRunningStatus
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ClockRunning feature is supported on the device
• false - The ClockRunning feature is not supported on the device
Remarks
None.
5.6.20.5.6.11 PLIB_RTCC_ExistsClockSelect Function
C
bool PLIB_RTCC_ExistsClockSelect(
RTCC_MODULE_ID index
);
Description
This function identifies whether the ClockSelect feature is available on the RTCC module. When this interface returns true, this
function is supported on the device:
• PLIB_RTCC_SourceClockSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ClockSelect feature is supported on the device
• false - The ClockSelect feature is not supported on the device
Remarks
None.
5.6.20.5.6.12 PLIB_RTCC_ExistsEnableControl Function
C
bool PLIB_RTCC_ExistsEnableControl(
RTCC_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the RTCC module. When this interface returns true,
these functions are supported on the device:
• PLIB_RTCC_Enable
• PLIB_RTCC_Disable
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EnableControl feature is supported on the device
• false - The EnableControl feature is not supported on the device
Remarks
None.
5.6.20.5.6.13 PLIB_RTCC_ExistsHalfSecond Function
C
bool PLIB_RTCC_ExistsHalfSecond(
RTCC_MODULE_ID index
);
Description
This function identifies whether the HalfSecond feature is available on the RTCC module. When this interface returns true, this
function is supported on the device:
• PLIB_RTCC_HalfSecondStatusBit
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The HalfSecond feature is supported on the device
• false - The HalfSecond feature is not supported on the device
Remarks
None.
5.6.20.5.6.14 PLIB_RTCC_ExistsOutputControl Function
C
bool PLIB_RTCC_ExistsOutputControl(
RTCC_MODULE_ID index
);
Description
This function identifies whether the OutputControl feature is available on the RTCC module. When this interface returns true, this
function is supported on the device:
• PLIB_RTCC_ClockOutputEnable
5.6 Peripheral Library Help MPLAB Harmony Help RTCC Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OutputControl feature is supported on the device
• false - The OutputControl feature is not supported on the device
Remarks
None.
5.6.20.5.6.15 PLIB_RTCC_ExistsOutputSelect Function
C
bool PLIB_RTCC_ExistsOutputSelect(
RTCC_MODULE_ID index
);
Description
This function identifies whether the OutputSelect feature is available on the RTCC module. When this interface returns true,
these functions are supported on the device:
• PLIB_RTCC_SecondsClockOutputSelect
• PLIB_RTCC_AlarmPulseOutputSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OutputSelect feature is supported on the device
• false - The OutputSelect feature is not supported on the device
Remarks
None.
5.6.20.5.6.16 PLIB_RTCC_ExistsRTCDate Function
C
bool PLIB_RTCC_ExistsRTCDate(
RTCC_MODULE_ID index
);
Description
This function identifies whether the RTCDateValue feature is available on the RTCC module. When this interface returns true,
these functions are supported on the device:
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• PLIB_RTCC_RTCDateGet
• PLIB_RTCC_RTCDateSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RTCDate feature is supported on the device
• false - The RTCDate feature is not supported on the device
Remarks
None.
5.6.20.5.6.17 PLIB_RTCC_ExistsRTCTime Function
C
bool PLIB_RTCC_ExistsRTCTime(
RTCC_MODULE_ID index
);
Description
This function identifies whether the RTCTimeValue feature is available on the RTCC module. When this interface returns true,
these functions are supported on the device:
• PLIB_RTCC_RTCTimeGet
• PLIB_RTCC_RTCTimeSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RTCTime feature is supported on the device
• false - The RTCTime feature is not supported on the device
Remarks
None.
5.6.20.5.6.18 PLIB_RTCC_ExistsStopInIdleControl Function
C
bool PLIB_RTCC_ExistsStopInIdleControl(
RTCC_MODULE_ID index
);
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Description
This function identifies whether the StopInIdle feature is available on the RTCC module. When this interface returns true, these
functions are supported on the device:
• PLIB_RTCC_StopInIdleEnable
• PLIB_RTCC_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StopInIdle feature is supported on the device
• false - The StopInIdle feature is not supported on the device
Remarks
None.
5.6.20.5.6.19 PLIB_RTCC_ExistsSynchronization Function
C
bool PLIB_RTCC_ExistsSynchronization(
RTCC_MODULE_ID index
);
Description
This function identifies whether the Synchronization feature is available on the RTCC module. When this interface returns true,
this function is supported on the device:
• PLIB_RTCC_ValueRegistersReadSyncBit
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Synchronization feature is supported on the device
• false - The Synchronization feature is not supported on the device
Remarks
None.
5.6.20.5.6.20 PLIB_RTCC_ExistsWriteEnable Function
C
bool PLIB_RTCC_ExistsWriteEnable(
RTCC_MODULE_ID index
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);
Description
This function identifies whether the WriteEnable feature is available on the RTCC module. When this interface returns true, these
functions are supported on the device:
• PLIB_RTCC_WriteEnable
• PLIB_RTCC_WriteDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WriteEnable feature is supported on the device
• false - The WriteEnable feature is not supported on the device
Remarks
None.
5.6.20.6 Files
Files
Name Description
plib_rtcc.h Real-Time Clock and Calendar (RTCC) Peripheral Libarary interface header for
RTCC common definitions.
Description
5.6.20.6.1 plib_rtcc.h
RTCC Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
RTCC Peripheral Library for all families of Microchip microcontrollers. The definitions in this file are common to the RTCC
peripheral.
Functions
Name Description
PLIB_RTCC_AlarmChimeDisable Disables the specific RTCC module's chime.
PLIB_RTCC_AlarmChimeEnable Enables the specific RTCC module's chime.
PLIB_RTCC_AlarmDateGet Returns the contents of the specific RTCC module's Alarm Date register.
PLIB_RTCC_AlarmDateSet Writes to the specific RTCC module's Alarm Date register.
PLIB_RTCC_AlarmDayGet Returns the contents of the Day bits in the specific RTCC module's
Alarm Date register.
PLIB_RTCC_AlarmDaySet Writes to the specific RTCC module's Alarm Date value register.
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PLIB_RTCC_AlarmDisable Disables the specific RTCC module's alarm.
PLIB_RTCC_AlarmEnable Enables the specific RTCC module's alarm.
PLIB_RTCC_AlarmHourGet Returns the contents of Hours bits in the specific RTCC module's Alarm
Time register.
PLIB_RTCC_AlarmHourSet The function returns the contents of Hours bits in the specific RTCC
module's Alarm Time register.
PLIB_RTCC_AlarmMaskModeSelect Sets the specific RTCC module's alarm mask Configuration bits.
PLIB_RTCC_AlarmMinuteGet Returns the contents of Minutes bits in the specific RTCC module's
Alarm Time register.
PLIB_RTCC_AlarmMinuteSet Returns the contents of the Minutes bits in the specific RTCC module's
Alarm Time register.
PLIB_RTCC_AlarmMonthGet Returns the contents of the Month bits in the specific RTCC module's
Alarm Date register.
PLIB_RTCC_AlarmMonthSet Writes to the specific RTCC module's Alarm Date register.
PLIB_RTCC_AlarmPulseInitialGet Returns the state of the initial alarm pulse.
PLIB_RTCC_AlarmPulseInitialSet Enables the determination of the initial alarm pulse.
PLIB_RTCC_AlarmRepeatCountGet Reads the specific RTCC module's alarm repeat counter.
PLIB_RTCC_AlarmRepeatCountSet Sets the specific RTCC module's alarm repeat counter.
PLIB_RTCC_AlarmSecondGet Returns the contents of the Seconds bits in the specific RTCC module's
Alarm Time register.
PLIB_RTCC_AlarmSecondSet Returns the contents of Seconds bits in the specific RTCC module's
Alarm Time register.
PLIB_RTCC_AlarmTimeGet Returns the contents of the specific RTCC module's Alarm Time register.
PLIB_RTCC_AlarmTimeSet Writes to the specific RTCC module's Alarm Time register.
PLIB_RTCC_AlarmValueRegisterPointer Sets the specific RTCC module's Alarm register pointer.
PLIB_RTCC_AlarmWeekDayGet Returns the contents of the WeekDay bits in the specific RTCC module's
Alarm Date register.
PLIB_RTCC_AlarmWeekDaySet Writes to the specific RTCC module's Alarm Date register.
PLIB_RTCC_ClockOutputDisable Disables the specific RTCC module's output pin.
PLIB_RTCC_ClockOutputEnable Enables the specific RTCC module's output pin.
PLIB_RTCC_ClockRunningStatus Provides the status of the RTCC clock.
PLIB_RTCC_ClockSourceSelect Selects the clock source for the RTCC module.
PLIB_RTCC_Disable Disables the specific RTCC module on the device.
PLIB_RTCC_DriftCalibrateGet Reads the specific RTCC module's drift calibration bits.
PLIB_RTCC_DriftCalibrateSet Sets the specific RTCC module's drift calibration bits.
PLIB_RTCC_Enable Enables the specific RTCC module on the device.
PLIB_RTCC_ExistsAlarmChimeControl Identifies whether the AlarmChimeControl feature exists on the RTCC
module.
PLIB_RTCC_ExistsAlarmControl Identifies whether the AlarmControl feature exists on the RTCC module.
PLIB_RTCC_ExistsAlarmDate Identifies whether the AlarmDate feature exists on the RTCC module.
PLIB_RTCC_ExistsAlarmMaskControl Identifies whether the AlarmMaskControl feature exists on the RTCC
module.
PLIB_RTCC_ExistsAlarmPulseInitial Identifies whether the AlarmPulseInitial feature exists on the RTCC
module.
PLIB_RTCC_ExistsAlarmRepeatControl Identifies whether the AlarmRepeatControl feature exists on the RTCC
module.
PLIB_RTCC_ExistsAlarmSyncronization Identifies whether the AlarmSynchronization feature exists on the RTCC
module.
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PLIB_RTCC_ExistsAlarmTime Identifies whether the AlarmTime feature exists on the RTCC module.
PLIB_RTCC_ExistsCalibration Identifies whether the Calibration feature exists on the RTCC module.
PLIB_RTCC_ExistsClockRunning Identifies whether the ClockRunning feature exists on the RTCC module.
PLIB_RTCC_ExistsClockSelect Identifies whether the ClockSelect feature exists on the RTCC module.
PLIB_RTCC_ExistsEnableControl Identifies whether the EnableControl feature exists on the RTCC module.
PLIB_RTCC_ExistsHalfSecond Identifies whether the HalfSecond feature exists on the RTCC module.
PLIB_RTCC_ExistsOutputControl Identifies whether the OutputControl feature exists on the RTCC module.
PLIB_RTCC_ExistsOutputSelect Identifies whether the OutputSelect feature exists on the RTCC module.
PLIB_RTCC_ExistsRTCDate Identifies whether the RTCDateValue feature exists on the RTCC
module.
PLIB_RTCC_ExistsRTCTime Identifies whether the RTCTimeValue feature exists on the RTCC
module.
PLIB_RTCC_ExistsStopInIdleControl Identifies whether the StopInIdle feature exists on the RTCC module.
PLIB_RTCC_ExistsSynchronization Identifies whether the Synchronization feature exists on the RTCC
module.
PLIB_RTCC_ExistsWriteEnable Identifies whether the WriteEnable feature exists on the RTCC module.
PLIB_RTCC_HalfSecondStatusGet The function returns the half second status bit.
PLIB_RTCC_OutputSelect Selects which signal will be presented on the RTCC pin
PLIB_RTCC_RTCDateGet Returns the contents of the specific RTCC module's Date register.
PLIB_RTCC_RTCDateSet Writes to the specific RTCC module's Date register.
PLIB_RTCC_RTCDayGet Returns the contents of the Days bits in the specific RTCC module's
Date register.
PLIB_RTCC_RTCDaySet Writes to the specific RTCC module's Date register.
PLIB_RTCC_RTCHourGet Returns the contents of the Hours bits in the specific RTCC module's
Time register.
PLIB_RTCC_RTCHourSet Writes the contents of the Hours bits in the specific RTCC module's Time
register.
PLIB_RTCC_RTCMinuteGet Returns the contents of the Minutes bits in the specific RTCC module's
Time register.
PLIB_RTCC_RTCMinuteSet Writes the contents of Minutes bits in the specific RTCC module's Time
register.
PLIB_RTCC_RTCMonthGet Returns the contents of the Months bits in the specific RTCC module's
Date register.
PLIB_RTCC_RTCMonthSet Writes to the specific RTCC module's Date register.
PLIB_RTCC_RTCSecondGet The function returns the contents of the Seconds bits in the specific
RTCC device's Time register.
PLIB_RTCC_RTCSecondSet Writes the contents of Seconds bits in the specific RTCC module's Time
register.
PLIB_RTCC_RTCTimeGet Returns the contents of the specific RTCC module's Time register.
PLIB_RTCC_RTCTimeSet Writes to the specific RTCC module's Time register.
PLIB_RTCC_RTCWeekDayGet Returns the contents of the WeekDay bits in the specific RTCC module's
Date register.
PLIB_RTCC_RTCWeekDaySet Writes to the specific RTCC module's Date register.
PLIB_RTCC_RTCYearGet Returns the contents of the Year bits in the specific RTCC module's Date
register.
PLIB_RTCC_RTCYearSet Writes to the specific RTCC module's Date register.
PLIB_RTCC_StopInIdleDisable Continues normal RTCC operation when the device enters Idle mode.
PLIB_RTCC_StopInIdleEnable Disables access to the RTCC module by the Peripheral Bus Clock
(PBCLK) when the CPU enters Idle mode.
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PLIB_RTCC_WriteDisable Disables writing to the specific RTCC module's value registers.
PLIB_RTCC_WriteEnable Enables writing to the specific RTCC module's value registers.
Company
Microchip Technology Inc.
5.6.21 System Bus Peripheral Library
5.6.21.1 Introduction
System Bus Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the System Bus on Microchip microcontrollers with a convenient C language
interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the module's
registers, thus hiding differences from one microcontroller variant to another.
Description
The System Bus is a multi-layer crossbar switching matrix that connects initiators to targets. An initiator is a device or peripheral
that initiates a data transfer to or from a target. Examples of initiators include the CPU, DMA and Ethernet controller. A target is a
memory, bus or peripheral that sends or receives data to/from an initiator.
The System Bus allows the system programmer to control which initiators can access each target by defining permission groups
for each initiator. Each target has one or more regions (physical address spaces) that can be individually programmed to allow
access to different permission groups. By setting initiator permission groups and target region read/write permissions, the system
programmer can allow or deny task or program access to system resources.
5.6.21.2 Release Notes
MPLAB Harmony Version: v0.70b System Bus Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.21.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
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Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.21.4 Using the Library
This topic describes the basic architecture of the System Bus Peripheral Library and provides information and examples on how
to use it.
Interface Header File: plib_sb.h
The interface to the System Bus Peripheral library is defined in the "plib_sb.h" header file. This file is included by the
"peripheral.h" file. Any C language source (.c) file that uses the System Bus Peripheral library should include "peripheral.h".
Library File:
The System Bus Peripheral library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the peripheral interacts with the framework.
5.6.21.4.1 Hardware Abstraction Model
This library provides the low-level abstraction of the System Bus on the Microchip family of microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in the software and introduces the library interface.
Description
System Bus Software Abstraction Block Diagram
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Hardware Abstraction Model
The System Bus Peripheral Library provides interface routines to initialize the bus matrix such that:
• Initiator permission groups are assigned
• Target regions are defined and given read/write access permissions
• Errors are identified, logged and cleared when a permission group violation occurs
• CPU and DMA priorities are set
5.6.21.4.2 How the Library Works
The System Bus is a crossbar interconnect matrix that provides for simultaneous data transfer between the CPU, memory, and
various peripherals on the PIC32 device. In addition, it provides a protection mechanism that allows trusted code to define and
restrict access to memory regions and peripherals. A typical application would be a secure bootloader that prevents a third party
or untrusted application from accessing regions of Flash memory that contain privileged code or information. The protection
mechanism works by dividing the target physical address space into regions, each of which may be accessed by one or more
initiators. Individual targets may have one or more regions. Each region can be individually programmed to allow read or write
access to one or more permission groups. Each initiator is assigned to a permission group.
This library provides interface routines to initialize the System Bus and initiator permission groups. On reset or NMI, the CPU is
assigned to permission group 0 (full access).
Note: Please refer to the PIC32 Family Reference Manual and specific device data sheet for information on target region
mapping and initiator permission groups for a specific device.
5.6.21.4.2.1 Initator Initialization
Initializing the initiators for the System Bus is a two-step process:
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• Set CPU and DMA priorities (if needed)
• Assign permission groups to each initiator
Priority assignments for CPU and DMA
By default, the System Bus uses a least-recently-serviced (LRS) priority arbitration scheme for most initiators, including the CPU
and DMA. For applications that require low latency, the user may set the CPU and/or DMA arbitration to fixed high priority. For
the CPU, fixed high priority means that the CPU gets arbitration preference while servicing an interrupt over all initiators using
LRS arbitration.
Priority is set using the PLIB_SB_CPUPrioritySet() and PLIB_SB_DMAPrioritySet() library functions. These functions
write to a register that must be unlocked first. The PLIB_SB_PriorityUnlock() is provided for this purpose.
Initiator permission groups
At reset, all initiators default to permission group 0. Each target region can be individually programmed to allow read or write
access to any or all permission groups. By assigning permission groups to initiators and restricting target region read/write
access based on permission group, it is possible to restrict initiator access to target regions during normal operations.
Permission groups are assigned using the library function PLIB_SB_InitPermGrpSet().
5.6.21.4.2.2 Target Initialization
Each System Bus target resides in a physical address space that contains one or more regions. Regions are used to provide
separate access permissions for different areas within a target address space. Region 0 for any target is defined as the entire
address space for that target. At reset, region 0 for all targets is accessible by any initiator with group 0 permissions.
Target regions are defined by base (physical) address and size. Read and write permissions are programmed individually for
each region. The number of regions for each target varies, depending on the target. Some regions have fixed addresses, sizes
and/or permissions. For example, region 0 for all targets encompasses the entire address space for the target, so the address
and size are pre-programmed. Similarly, write permission for PFM is disabled for all initiators except the Flash controller.
Target region initialization is a four step process:
1. Set the base address of a region using PLIB_SB_PGRegionAddrSet(). This function takes an enumerated value for the
target region. Only valid target regions should be enumerated for any specific device.
2. Set the size of the region using PLIB_SB_PGRegionSizeSet().
3. Set the read permissions using PLIB_SB_PGRegionReadPermSet().
4. Set the write permissions using PLIB_SB_PGRegionWritePermSet().
Note: Please refer to the Memory Organization Family Reference Manual section and the specific device data sheet for
information on target region mapping and initiator permission groups.
5.6.21.4.2.3 PGV Error Handling
A permission group violation (PGV) occurs when an initiator attempts to access a target without the proper permissions. Any
permission group violation will trigger an interrupt to the CPU. If enabled, the System Bus will report a PGV to the error log
registers in the System Bus. The PGV interrupt handler can then use this library to retrieve information about the violation and
act accordingly.
By default, error reporting is disabled in the System Bus and must be enabled during the startup or boot code. Errors are divided
into two categories: primary and secondary. Primary errors are errors arising from secure accesses, such as trying to access a
target region without the proper permissions. Secondary errors are errors arising from non-secure accesses, such as trying to
access a memory location outside of a target region.
PIC32 devices support logging of primary errors only. Primary error logging is enabled using the library function
PLIB_SB_PGVErrorReportPrimaryEnable(). Primary error reporting can be disabled using the library function
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PLIB_SB_PGVErrorReportPrimaryDisable(). Error logging must be enabled or disabled separately for each target.
Once a permission group violation error is logged, the user can use this library to retrieve information from the System Bus error
log registers. Each target has its own set of error log registers. The error information available and the library API used to
retrieve it are shown in the table below.
Error Log Data System Bus Peripheral Library Function
Has the specified target reported an error? PLIB_SB_PGVErrorStatus()
Has the specified target reported more than one error since last
cleared?
PLIB_SB_PGVErrorMulti()
Type of error. PLIB_SB_PGVErrorCode()
Initiator ID. PLIB_SB_PGVErrorInitiatorID()
OCP command code of the transaction. PLIB_SB_PGVErrorCommandCode()
The region number of the specified target accessed during the
violation.
PLIB_SB_PGVErrorRegion()
Permission group of initiator that caused the violation. PLIB_SB_PGVErrorPermissionGroup()
Once an error is logged, it needs to be cleared by software before any data for a subsequent violation can be logged (for the
same target). This is typically done in the exception handler that reads the data. Which function is used depends on whether a
single or multiple error violation occurred. Single violations are cleared with PLIB_SB_PGVErrorClearSingle(), and multiple
violations are cleared with PLIB_SB_PGVErrorClearMulti().
5.6.21.5 Configuring the Library
The library is configured for the supported System Bus module when the processor is chosen in the MPLAB IDE.
5.6.21.6 Library Interface
Data Types and Constants
Name Description
PLIB_SB_ARB_POLICY This enumeration lists the possible arbitration policies that can be assigned to the
CPU and DMA for SRAM access.
PLIB_SB_ERROR Lists the possible SB Transaction Error Codes
PLIB_SB_INIT_ID Lists the possible SB Initiator IDs.
PLIB_SB_INIT_PG Lists the possible Initiator permission groups
PLIB_SB_OCP_CMD_CODE Lists the possible OCP Command codes.
PLIB_SB_PG_INITIATOR Lists the possible permission group Initiators
PLIB_SB_REGION_PG This enumeration lists the possible permission groups assigned to a region for
read and/or write access.
PLIB_SB_TGT_ID Lists the possible SB Target IDs
PLIB_SB_TGT_REGION Lists the programmable target regions
SB_MODULE_ID Lists the possible Module IDs for the system bus.
Feature Existence Functions
Name Description
PLIB_SB_ExistsCPUPriority Identifies whether the CPUPriority feature exists on the SB module
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PLIB_SB_ExistsDMAPriority Identifies whether the DMAPriority feature exists on the SB module
PLIB_SB_ExistsInitPermGrp Identifies whether the InitPermGrp feature exists on the SB module
PLIB_SB_ExistsPGRegAddr Identifies whether the PGRegAddr feature exists on the SB module
PLIB_SB_ExistsPGRegRdPerm Identifies whether the PGRegRdPerm feature exists on the SB module
PLIB_SB_ExistsPGRegSize Identifies whether the PGRegSize feature exists on the SB module
PLIB_SB_ExistsPGRegWrPerm Identifies whether the PGRegWrPerm feature exists on the SB module
PLIB_SB_ExistsPGVErrClear Identifies whether the PGVErrClear feature exists on the SB module
PLIB_SB_ExistsPGVErrClrMulti Identifies whether the PGVErrClrMulti feature exists on the SB module
PLIB_SB_ExistsPGVErrClrSingle Identifies whether the PGVErrClrSingle feature exists on the SB module
PLIB_SB_ExistsPGVErrCmdCode Identifies whether the PGVErrCmdCode feature exists on the SB module
PLIB_SB_ExistsPGVErrInitID Identifies whether the PGVErrInitID feature exists on the SB module
PLIB_SB_ExistsPGVErrPG Identifies whether the PGVErrPG feature exists on the SB module
PLIB_SB_ExistsPGVErrRegion Identifies whether the PGVErrRegion feature exists on the SB module
PLIB_SB_ExistsPGVErrRptPri Identifies whether the PGVErrRptPri feature exists on the SB module
PLIB_SB_ExistsPGVErrStatus Identifies whether the PGVErrStatus feature exists on the SB module
Other Functions
Name Description
PLIB_SB_CPUPrioritySet Sets the CPU arbitration policy to SRAM when servicing an interrupt
PLIB_SB_DMAPrioritySet Sets the DMA arbitration policy
PLIB_SB_InitPermGrpSet Sets the read/write permission group(s) for an initiator. The region must also allow
read/write access for the permission group for a read/write to occur.
PGV Error Functions
Name Description
PLIB_SB_PGVErrorClearMulti Clears multiple permission group errors for the specified target.
PLIB_SB_PGVErrorClearSingle Clears a single permission group error for the specified target.
PLIB_SB_PGVErrorCode Returns a value corresponding to the type of error logged for the
specified target.
PLIB_SB_PGVErrorCommandCode Returns the OCP command code of the transaction that caused the
protection violation for the specified target.
PLIB_SB_PGVErrorInitiatorID Returns the ID of the Initiator that caused the protection violation
PLIB_SB_PGVErrorLogClearMulti Clears a multiple protection group violations error from the specified
target error log register.
PLIB_SB_PGVErrorLogClearSingle Clears a single protection group violation error from the specified target
error log register.
PLIB_SB_PGVErrorMulti Indicates if more than one perimission group violation has occurred
since last cleared.
PLIB_SB_PGVErrorPermissionGroup Returns the permission group of the protection region in a target
address space that caused the protection violation for the specified
target.
PLIB_SB_PGVErrorRegion Returns the number of the protection region in the specified target
address space that caused the protection violation.
PLIB_SB_PGVErrorReportPrimaryDisable Disables primary permission group error reporting for the specified
target to the SB flag register.
PLIB_SB_PGVErrorReportPrimaryEnable Enables primary permission group error reporting for the specified
target to the SB flag register.
PLIB_SB_PGVErrorStatus Identifies whether a permission group violation has been reported for
the specified target.
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Target Initialization Functions
Name Description
PLIB_SB_PGRegionAddrGet Returns the base address for a permission group region within a target's
physical address space.
PLIB_SB_PGRegionAddrSet Sets the base address for a permission group region within a target's
physical address space. Not all regions are programmable.
PLIB_SB_PGRegionReadPermClear Clears the permission bit(s) corresponding to the requested read
permissions for a permission group region within a target's physical address
space. Not all regions are programmable.
PLIB_SB_PGRegionReadPermSet Sets the permission bit(s) corresponding to the requested read permissions
for a permission group region within a target's physical address space. Not
all regions are programmable.
PLIB_SB_PGRegionSizeGet Returns the size for a permission group region within a target's physical
address space.
PLIB_SB_PGRegionSizeSet Sets the size for a permission group region within a target's physical address
space. Not all regions are programmable.
PLIB_SB_PGRegionWritePermClear Clears the permission bit(s) corresponding to the requested write
permissions for a permission group region within a target's physical address
space. Not all regions are programmable.
PLIB_SB_PGRegionWritePermSet Sets the permission bit(s) corresponding to the requested write permissions
for a permission group region within a target's physical address space. Not
all regions are programmable.
Description
This section describes the Application Programming Interface (API) functions of the System Bus Peripheral Library.
Refer to each section for a detailed description.
5.6.21.6.1 Target Initialization Functions
5.6.21.6.1.1 PLIB_SB_PGRegionAddrGet Function
C
uint32_t PLIB_SB_PGRegionAddrGet(
SB_MODULE_ID index,
PLIB_SB_TGT_REGION region
);
Description
This function returns the base address for a permission group region within a target's physical address space.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
region The region for which the address is returned.
Returns
uint32_t - The base address of the region.
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Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
uint32_t T1R6BaseAddress;
T1R6BaseAddress = PLIB_SB_PGRegionAddrGet(SB_ID_1, PLIB_T1_REGION_6);
5.6.21.6.1.2 PLIB_SB_PGRegionAddrSet Function
C
void PLIB_SB_PGRegionAddrSet(
SB_MODULE_ID index,
PLIB_SB_TGT_REGION region,
uint32_t phys_addr
);
Description
This function sets the base address for a permission group region within a target's physical address space. Not all regions are
programmable.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
region The region for which the base address is set.
phys_addr The base address of the region. Must be aligned to the intended size of the region.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Region 0 of all targets have a defined start address which may not be changed. Some regions (such as those containing
peripheral SFRs) are fixed and may not be changed. Please refer to the specific device data sheet for details.
Example
// Set up two regions in PFM with full read and write permission
#define REGION_5_BASE_ADDR 0x1D000000
#define REGION_6_BASE_ADDR (REGION5_BASE_ADDR + (32*1024))
#define REGION_5_SIZE 0x06 // 32KB
#define REGION_6_SIZE 0x05 // 16KB
#define FULL_PERM (REGION_PG_0 | REGION_PG_1 | REGION_PG_2 | REGION_PG_3)
PLIB_SB_PGRegionAddrSet(SB_ID_1, PLIB_SB_T1_REGION_5, REGION_5_BASE_ADDR);
PLIB_SB_PGRegionAddrSet(SB_ID_1, PLIB_SB_T1_REGION_6, REGION_6_BASE_ADDR);
PLIB_SB_PGRegionSizeSet(SB_ID_1, PLIB_SB_T1_REGION_5, REGION_5_SIZE);
PLIB_SB_PGRegionSizeSet(SB_ID_1, PLIB_SB_T1_REGION_6, REGION_6_SIZE);
PLIB_SB_PGRegionReadPermSet(SB_ID_1, PLIB_T1_REGION_5, FULL_PERM);
PLIB_SB_PGRegionReadPermSet(SB_ID_1, PLIB_T1_REGION_6, FULL_PERM);
PLIB_SB_PGRegionWritePermSet(SB_ID_1, PLIB_T1_REGION_5, FULL_PERM);
PLIB_SB_PGRegionWritePermSet(SB_ID_1, PLIB_T1_REGION_6, FULL_PERM);
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5.6.21.6.1.3 PLIB_SB_PGRegionReadPermClear Function
C
void PLIB_SB_PGRegionReadPermClear(
SB_MODULE_ID index,
PLIB_SB_TGT_REGION region,
PLIB_SB_REGION_PG readPerm
);
Description
This function clears the permission bit(s) corresponding to the requested read permissions for a permission group region within a
target's physical address space. Not all regions are programmable.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
region The region number within the target's address space to be given permissions. Not
all regions are programmable.
readPerm Bitwise OR of the groups given read permission for the region.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Default reset value for all programmable regions is read permission for all groups.
Example
See code example for PLIB_SB_PGRegionAddrSet().
5.6.21.6.1.4 PLIB_SB_PGRegionReadPermSet Function
C
void PLIB_SB_PGRegionReadPermSet(
SB_MODULE_ID index,
PLIB_SB_TGT_REGION region,
PLIB_SB_REGION_PG readPerm
);
Description
This function sets the permission bit(s) corresponding to the requested read permissions for a permission group region within a
target's physical address space. Not all regions are programmable.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
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region The region number within the target's address space to be given permissions. Not
all regions are programmable.
readPerm Bitwise OR of the groups given read permission for the region.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Default reset value for all programmable regions is read permission for all groups.
Example
See code example for PLIB_SB_PGRegionAddrSet().
5.6.21.6.1.5 PLIB_SB_PGRegionSizeGet Function
C
uint32_t PLIB_SB_PGRegionSizeGet(
SB_MODULE_ID index,
PLIB_SB_TGT_REGION region
);
Description
This function returns the size for a permission group region within a target's physical address space. Not all regions are
programmable.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
region The region for which the size is to be set. Not all regions are programmable.
Returns
The size of the region.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Region 0 of all targets encompasses the entire address range of the target, and may not be changed. Some regions (such as
those containing peripheral SFRs) may not be changed. Please refer to the specific device data sheet for details.
Example
uint32_t T1R6Size;
T1R6Size = PLIB_SB_PGRegionSizeGet(SB_ID_1, PLIB_T1_REGION_6);
5.6.21.6.1.6 PLIB_SB_PGRegionSizeSet Function
C
void PLIB_SB_PGRegionSizeSet(
SB_MODULE_ID index,
PLIB_SB_TGT_REGION region,
uint32_t size
);
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Description
This function sets the size for a permission group region within a target's physical address space. Not all regions are
programmable.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
region The region for which the size is to be set. Not all regions are programmable.
size The actual size of the region being programmed is calculted as
follows 2**(size-1)*1024 bytes
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Region 0 of all targets encompasses the entire address range of the target, and may not be changed. Some regions (such as
those containing peripheral SFRs) may not be changed. Please refer to the specific device data sheet for details.
Example
See code example for PLIB_SB_PGRegionAddrSet().
5.6.21.6.1.7 PLIB_SB_PGRegionWritePermClear Function
C
void PLIB_SB_PGRegionWritePermClear(
SB_MODULE_ID index,
PLIB_SB_TGT_REGION region,
PLIB_SB_REGION_PG writePerm
);
Description
This function clears the permission bit(s) corresponding to the requested write permissions for a permission group region within a
target's physical address space. Not all regions are programmable.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
region The region number within the target's address space to be given permissions. Not
all regions are programmable.
writePerm Bitwise OR of the groups given read permission for the region.
Returns
None.
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Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Default reset value for all programmable regions is write permission for all groups. Some regions may not be programmable by
all initiators (flash, for example). Please refer to the specific device data sheet for details.
Example
See code example for PLIB_SB_PGRegionAddrSet().
5.6.21.6.1.8 PLIB_SB_PGRegionWritePermSet Function
C
void PLIB_SB_PGRegionWritePermSet(
SB_MODULE_ID index,
PLIB_SB_TGT_REGION region,
PLIB_SB_REGION_PG writePerm
);
Description
This function sets the permission bit(s) corresponding to the requested write permissions for a permission group region within a
target's physical address space. Not all regions are programmable.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
region The region number within the target's address space to be given permissions. Not
all regions are programmable.
writePerm Bitwise OR of the groups given read permission for the region.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Default reset value for all programmable regions is write permission for all groups. Some regions may not be programmable by
all initiators (flash, for example). Please refer to the specific device data sheet for details.
Example
See code example for PLIB_SB_PGRegionAddrSet().
5.6.21.6.2 PGV Error Functions
5.6.21.6.2.1 PLIB_SB_PGVErrorClearMulti Function
C
bool PLIB_SB_PGVErrorClearMulti(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
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Description
This function clears multiple permission group errors for the specified target.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target.
Returns
mult - Returns the value of the CLEAR bit in the SBTxECLRM register for the specified target. The act of reading this bit clears
the error.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
bool mult;
mult = PLIB_SB_PGVErrorClearMulti(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.2 PLIB_SB_PGVErrorClearSingle Function
C
bool PLIB_SB_PGVErrorClearSingle(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function clears a single permission group error for the specified target.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target.
Returns
sing - Returns the value of the CLEAR bit in the SBTxECLRM register for the specified target. The act of reading this bit clears
the error.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
bool sing;
sing = PLIB_SB_PGVErrorClearSingle(SB_ID_1, PLIB_SB_TGT_ID_T0);
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5.6.21.6.2.3 PLIB_SB_PGVErrorCode Function
C
PLIB_SB_ERROR PLIB_SB_PGVErrorCode(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function returns a value corresponding to the type of error logged for the specified target.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target to be read.
Returns
PLIB_SB_ERROR enumeration representing the type of SB error logged states.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
PLIB_SB_ERROR error;
error = PLIB_SB_ERROR PLIB_SB_PGVErrorCode(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.4 PLIB_SB_PGVErrorCommandCode Function
C
PLIB_SB_OCP_CMD_CODE PLIB_SB_PGVErrorCommandCode(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function returns the OCP command code of the transaction that caused the protection violation for the specified target.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target.
Returns
OCP command code
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
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Example
PLIB_SB_OCP_CMD_CODE commandCode;
commandCode = PLIB_SB_PGVErrorCommandCode(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.5 PLIB_SB_PGVErrorInitiatorID Function
C
PLIB_SB_INIT_ID PLIB_SB_PGVErrorInitiatorID(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function returns the ID of the Initiator that caused the protection violation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target.
Returns
An enumerated value representing the ID of the initiator that caused the protection violation.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
PLIB_SB_INIT_ID id;
id = PLIB_SB_PGVErrorInitiatorID(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.6 PLIB_SB_PGVErrorLogClearMulti Function
C
void PLIB_SB_PGVErrorLogClearMulti(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function clears a multiple protection group violations error from the specified target error log register. Multiple errors are
cleared by writing a '1' to both the MULTI and CODE fields of the SBTxELOG1 register for the specified target.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target to be cleared.
Returns
None.
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Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
PLIB_SB_PGVErrorLogClearMulti(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.7 PLIB_SB_PGVErrorLogClearSingle Function
C
void PLIB_SB_PGVErrorLogClearSingle(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function clears a single protection group violation error from the specified target error log register. Single errors are cleared
by writing a '1' to the CODE field of the SBTxELOG1 register for the specified target.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target to be cleared.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
PLIB_SB_PGVErrorLogClearSingle(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.8 PLIB_SB_PGVErrorMulti Function
C
bool PLIB_SB_PGVErrorMulti(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function indicates if more than one perimission group violation has occurred since last cleared.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target to be read.
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Returns
true - Multiple permission group violations. false - Single or no permission group violations.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
bool multiPGV;
multiPGV = PLIB_SB_PGVErrorMulti(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.9 PLIB_SB_PGVErrorPermissionGroup Function
C
int PLIB_SB_PGVErrorPermissionGroup(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function returns the permission group of the protection region in a target address space that caused the protection violation
for the specified target.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
int pg;
pg = PLIB_SB_PGVErrorPermissionGroup(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.10 PLIB_SB_PGVErrorRegion Function
C
int PLIB_SB_PGVErrorRegion(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function returns the number of the protection region in the specified target address space that caused the protection
violation. Note that if there are no other region matches, region 0 (the default region that spans the entire target address space)
will always match, and this function will return 0.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance.
target The target.
Returns
Region number in target address space or -1 on unrecognized target.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
int region;
region = PLIB_SB_PGVErrorRegion(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.11 PLIB_SB_PGVErrorReportPrimaryDisable Function
C
void PLIB_SB_PGVErrorReportPrimaryDisable(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function disables primary permission group error reporting for the specified target to the SB flag register.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Reporting of primary errors is disabled at reset.
Example
PLIB_SB_PGVErrorReportPrimaryDisable(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.12 PLIB_SB_PGVErrorReportPrimaryEnable Function
C
void PLIB_SB_PGVErrorReportPrimaryEnable(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function enables primary permission group error reporting for the specified target to the SB flag register.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target The target.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Reporting of primary errors is disabled at reset.
Example
PLIB_SB_PGVErrorReportPrimaryEnable(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.2.13 PLIB_SB_PGVErrorStatus Function
C
bool PLIB_SB_PGVErrorStatus(
SB_MODULE_ID index,
PLIB_SB_TGT_ID target
);
Description
This function identifies whether a permission group violation has been reported for the specified target.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance.
target Target to be checked.
Returns
true - Target is reporting a permission group violation. false - Target is not reporting a permission group violation.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
Example
bool sbPgv;
sbPgv = PLIB_SB_PGVErrorStatus(SB_ID_1, PLIB_SB_TGT_ID_T0);
5.6.21.6.3 Data Types and Constants
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5.6.21.6.3.1 PLIB_SB_ARB_POLICY Enumeration
C
typedef enum {
PRIORITY_LRS,
PRIORITY_HI
} PLIB_SB_ARB_POLICY;
Description
SB Arbitration Policy
This enumeration lists the possible arbitration policies that can be assigned to the CPU and DMA for SRAM access.
Members
Members Description
PRIORITY_LRS Least Recently Serviced Arbitration
PRIORITY_HI High Priority
5.6.21.6.3.2 PLIB_SB_ERROR Enumeration
C
typedef enum {
PLIB_SB_ERROR_NONE,
PLIB_SB_ERROR_PGV
} PLIB_SB_ERROR;
Description
PG Error Code
This enumeration lists the possible transacton error codes for the SB.
Members
Members Description
PLIB_SB_ERROR_NONE No Error
PLIB_SB_ERROR_PGV Permission Group Violation
5.6.21.6.3.3 PLIB_SB_INIT_ID Enumeration
C
typedef enum {
PLIB_SB_INIT_ID_NONE,
PLIB_SB_INIT_ID_CPU_LRS,
PLIB_SB_INIT_ID_CPU_HI,
PLIB_SB_INIT_ID_DMA1_RD_LRS,
PLIB_SB_INIT_ID_DMA1_RD_HI,
PLIB_SB_INIT_ID_DMA1_WR_LRS,
PLIB_SB_INIT_ID_DMA1_WR_HI,
PLIB_SB_INIT_ID_USB1,
PLIB_SB_INIT_ID_ETH1_RD,
PLIB_SB_INIT_ID_ETH1_WR,
PLIB_SB_INIT_ID_CAN1,
PLIB_SB_INIT_ID_CAN2,
PLIB_SB_INIT_ID_SQI1,
PLIB_SB_INIT_ID_FLASH_CTL,
PLIB_SB_INIT_ID_CRYPTO
} PLIB_SB_INIT_ID;
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Description
SB Initator ID
This enumeration lists the possible SB Initiator IDs. This ID is used for self-reporting and error logging. LRS and HI are SB
arbitration schemes set by the soft configuration register CFGCON.
5.6.21.6.3.4 PLIB_SB_INIT_PG Enumeration
C
typedef enum {
PLIB_SB_INIT_PG_0,
PLIB_SB_INIT_PG_1,
PLIB_SB_INIT_PG_2,
PLIB_SB_INIT_PG_3
} PLIB_SB_INIT_PG;
Description
SB Initiator Permission Groups
This enumeration lists the possible initiator permission groups for the SB.
Members
Members Description
PLIB_SB_INIT_PG_0 Privilege Group 0
PLIB_SB_INIT_PG_1 Privilege Group 1
PLIB_SB_INIT_PG_2 Privilege Group 2
PLIB_SB_INIT_PG_3 Privilege Group 3
Remarks
These values are used to program the CFGPG soft configuration register, which is not part of the SB. This should be done by the
boot code to set up the desired initiator permissions prior to programming the SB.
5.6.21.6.3.5 PLIB_SB_OCP_CMD_CODE Enumeration
C
typedef enum {
PLIB_SB_OCP_CMD_IDLE,
PLIB_SB_OCP_CMD_WRITE,
PLIB_SB_OCP_CMD_READ,
PLIB_SB_OCP_CMD_READEX,
PLIB_SB_OCP_CMD_WRITE_NON_POST,
PLIB_SB_OCP_CMD_BROADCAST
} PLIB_SB_OCP_CMD_CODE;
Description
OCP Command Codes
This enumeration lists the possible OCP command codes. An OCP command code is logged when a transaction violation
occurs. The command code of the offending command can then be read.
5.6.21.6.3.6 PLIB_SB_PG_INITIATOR Enumeration
C
typedef enum {
PLIB_SB_PG_INITIATOR_CPU,
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PLIB_SB_PG_INITIATOR_DMA1,
PLIB_SB_PG_INITIATOR_USB1,
PLIB_SB_PG_INITIATOR_CAN1,
PLIB_SB_PG_INITIATOR_CAN2,
PLIB_SB_PG_INITIATOR_ETH1,
PLIB_SB_PG_INITIATOR_SQI1,
PLIB_SB_PG_INITIATOR_FLASH_CTL,
PLIB_SB_PG_INITIATOR_CRYPTO
} PLIB_SB_PG_INITIATOR;
Description
SB Initators
This enumeration lists the possible permission group Initiators
5.6.21.6.3.7 PLIB_SB_REGION_PG Enumeration
C
typedef enum {
REGION_PG_0,
REGION_PG_1,
REGION_PG_2,
REGION_PG_3
} PLIB_SB_REGION_PG;
Description
SB Region Permission Groups
Lists the possible permission groups assigned to a region for read and/or write access.
Members
Members Description
REGION_PG_0 Privilege Group 0 has read/write permission
REGION_PG_1 Privilege Group 1 has read/write permission
REGION_PG_2 Privilege Group 2 has read/write permission
REGION_PG_3 Privilege Group 3 has read/write permission
5.6.21.6.3.8 PLIB_SB_TGT_ID Enumeration
C
typedef enum {
PLIB_SB_TGT_ID_T0,
PLIB_SB_TGT_ID_T1,
PLIB_SB_TGT_ID_T2,
PLIB_SB_TGT_ID_T3,
PLIB_SB_TGT_ID_T4,
PLIB_SB_TGT_ID_T5,
PLIB_SB_TGT_ID_T6,
PLIB_SB_TGT_ID_T7,
PLIB_SB_TGT_ID_T8,
PLIB_SB_TGT_ID_T9,
PLIB_SB_TGT_ID_T10,
PLIB_SB_TGT_ID_T11,
PLIB_SB_TGT_ID_T12,
PLIB_SB_TGT_ID_T13
} PLIB_SB_TGT_ID;
Description
SB Target ID
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This enumeration lists the possible SB Target IDs
Members
Members Description
PLIB_SB_TGT_ID_T0 System Bus
PLIB_SB_TGT_ID_T1 Prefetch Module
PLIB_SB_TGT_ID_T2 Data RAM 1
PLIB_SB_TGT_ID_T3 Data RAM 2
PLIB_SB_TGT_ID_T4 External Bus Interface
PLIB_SB_TGT_ID_T5 Peripheral Bus 1
PLIB_SB_TGT_ID_T6 Peripheral Bus 2
PLIB_SB_TGT_ID_T7 Peripheral Bus 3
PLIB_SB_TGT_ID_T8 Peripheral Bus 4
PLIB_SB_TGT_ID_T9 Peripheral Bus 5
PLIB_SB_TGT_ID_T10 USB
PLIB_SB_TGT_ID_T11 Serial Quad Interface
PLIB_SB_TGT_ID_T12 Crypto
PLIB_SB_TGT_ID_T13 Random Number Generator
5.6.21.6.3.9 PLIB_SB_TGT_REGION Enumeration
C
typedef enum {
PLIB_SB_T0_REGION_0,
PLIB_SB_T0_REGION_1,
PLIB_SB_T1_REGION_0,
PLIB_SB_T1_REGION_1,
PLIB_SB_T1_REGION_2,
PLIB_SB_T1_REGION_3,
PLIB_SB_T1_REGION_4,
PLIB_SB_T1_REGION_5,
PLIB_SB_T1_REGION_6,
PLIB_SB_T1_REGION_7,
PLIB_SB_T1_REGION_8,
PLIB_SB_T2_REGION_0,
PLIB_SB_T2_REGION_1,
PLIB_SB_T2_REGION_2,
PLIB_SB_T3_REGION_0,
PLIB_SB_T3_REGION_1,
PLIB_SB_T3_REGION_2,
PLIB_SB_T4_REGION_0,
PLIB_SB_T4_REGION_1,
PLIB_SB_T4_REGION_2,
PLIB_SB_T5_REGION_0,
PLIB_SB_T5_REGION_1,
PLIB_SB_T5_REGION_2,
PLIB_SB_T6_REGION_0,
PLIB_SB_T6_REGION_1,
PLIB_SB_T7_REGION_0,
PLIB_SB_T7_REGION_1,
PLIB_SB_T8_REGION_0,
PLIB_SB_T8_REGION_1,
PLIB_SB_T9_REGION_0,
PLIB_SB_T9_REGION_1,
PLIB_SB_T10_REGION_0,
PLIB_SB_T11_REGION_0,
PLIB_SB_T11_REGION_1,
PLIB_SB_T12_REGION_0,
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PLIB_SB_T13_REGION_0
} PLIB_SB_TGT_REGION;
Description
Regions
This enumeration lists the programmable SB target regions.
Members
Members Description
PLIB_SB_T0_REGION_0 System Bus Region 0
PLIB_SB_T0_REGION_1 System Bus Region 1
PLIB_SB_T1_REGION_0 Prefetch Module Region 0
PLIB_SB_T1_REGION_1 Prefetch Module Region 1
PLIB_SB_T1_REGION_2 Prefetch Module Region 2
PLIB_SB_T1_REGION_3 Prefetch Module Region 3
PLIB_SB_T1_REGION_4 Prefetch Module Region 4
PLIB_SB_T1_REGION_5 Prefetch Module Region 5
PLIB_SB_T1_REGION_6 Prefetch Module Region 6
PLIB_SB_T1_REGION_7 Prefetch Module Region 7
PLIB_SB_T1_REGION_8 Prefetch Module Region 8
PLIB_SB_T2_REGION_0 Data RAM 1 Region 0
PLIB_SB_T2_REGION_1 Data RAM 1 Region 1
PLIB_SB_T2_REGION_2 Data RAM 1 Region 2
PLIB_SB_T3_REGION_0 Data RAM 2 Region 0
PLIB_SB_T3_REGION_1 Data RAM 2 Region 1
PLIB_SB_T3_REGION_2 Data RAM 2 Region 2
PLIB_SB_T4_REGION_0 External Bus Interface Region 0
PLIB_SB_T4_REGION_1 External Bus Interface Region 1
PLIB_SB_T4_REGION_2 External Bus Interface Region 2
PLIB_SB_T5_REGION_0 Peripheral Bus 1 Region 0
PLIB_SB_T5_REGION_1 Peripheral Bus 1 Region 1
PLIB_SB_T5_REGION_2 Peripheral Bus 1 Region 2
PLIB_SB_T6_REGION_0 Peripheral Bus 2 Region 0
PLIB_SB_T6_REGION_1 Peripheral Bus 2 Region 1
PLIB_SB_T7_REGION_0 Peripheral Bus 3 Region 0
PLIB_SB_T7_REGION_1 Peripheral Bus 3 Region 1
PLIB_SB_T8_REGION_0 Peripheral Bus 4 Region 0
PLIB_SB_T8_REGION_1 Peripheral Bus 4 Region 1
PLIB_SB_T9_REGION_0 Peripheral Bus 5 Region 0
PLIB_SB_T9_REGION_1 Peripheral Bus 5 Region 1
PLIB_SB_T10_REGION_0 USB Region 0
PLIB_SB_T11_REGION_0 Serial Quad Interface Region 0
PLIB_SB_T11_REGION_1 Serial Quad Interface Region 1
PLIB_SB_T12_REGION_0 Crytpo Region 9
PLIB_SB_T13_REGION_0 Random Number Generator 0
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5.6.21.6.3.10 SB_MODULE_ID Enumeration
C
typedef enum {
SB_ID_1,
SB_NUMBER_OF_MODULES
} SB_MODULE_ID;
Description
Module ID
This enumeration lists the possible Module IDs for the system bus.
Remarks
Refer to the data sheet to get the correct number of modules defined for the desired device.
5.6.21.6.4 Other Functions
5.6.21.6.4.1 PLIB_SB_CPUPrioritySet Function
C
void PLIB_SB_CPUPrioritySet(
SB_MODULE_ID index,
PLIB_SB_ARB_POLICY priority
);
Description
This function sets the CPU arbitration policy to SRAM when servicing an interrupt.
Preconditions
System must be unlocked before the priority can be set.
Parameters
Parameters Description
priority Use either high priority or least-recently-serviced algorithm.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
This function writes to the soft configuration register CFGCON, which is not part of the SB. This should be done by the boot code
prior to programming the SB. Note that the system must be unlocked before the priority can be set.
Default at reset is PRIORITY_LRS.
Example
PLIB_SB_PriorityUnlock();
PLIB_SB_CPUPrioritySet(SB_ID_1, PRIORITY_HI);
5.6.21.6.4.2 PLIB_SB_DMAPrioritySet Function
C
void PLIB_SB_DMAPrioritySet(
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SB_MODULE_ID index,
PLIB_SB_ARB_POLICY priority
);
Description
This function sets the DMA arbitration.
Preconditions
System must be unlocked before the priority can be set.
Parameters
Parameters Description
priority Use either high priority or least-recently-serviced algorithm.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
This function writes to the soft configuration register CFGCON, which is not part of the SB. This should be done by the boot code
prior to programming the SB. Note that the system must be unlocked before the priority can be set.
Default at reset is PRIORITY_LRS.
Example
PLIB_SB_PriorityUnlock();
void PLIB_SB_DMAPrioritySet(SB_ID_1, PRIORITY_HI);
5.6.21.6.4.3 PLIB_SB_InitPermGrpSet Function
C
void PLIB_SB_InitPermGrpSet(
SB_MODULE_ID index,
PLIB_SB_PG_INITIATOR initiator,
PLIB_SB_INIT_PG pg
);
Description
This function sets the read/write permission group(s) for an initiator. The region must also allow read/write access for the
permission group for a read/write to occur.
Preconditions
None.
Parameters
Parameters Description
initiator The initiator for which permission groups are assigned.
pg The permission group(s) to which the initiator is assigned.
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet for availability.
This function writes to the soft configuration register CFGPG, which is not part of the SB. Permission groups should be assigned
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by the boot code prior to programming the SB.
Default permission group at reset for all initiators is 0.
After an NMI, the CPU permission group reverts to 0. All other initiator permission groups remain unchanged.
The effective CPU permission group value in debug mode is controlled by boot configuration value DBGPER[2:0]. If DBGPER
denies access to the group CPU1PG selects, the effective value selects group 3.
Example
PLIB_SB_InitPermGrpSet(SB_ID_1, PLIB_SB_PG_INITIATOR_CPU, PLIB_SB_INIT_PG_1);
5.6.21.6.5 Feature Existence Functions
5.6.21.6.5.1 PLIB_SB_ExistsCPUPriority Function
C
bool PLIB_SB_ExistsCPUPriority(
SB_MODULE_ID index
);
Description
This function identifies whether the CPUPriority feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_CPUPrioritySet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CPUPriority feature is supported on the device
• false - The CPUPriority feature is not supported on the device
Remarks
None.
5.6.21.6.5.2 PLIB_SB_ExistsDMAPriority Function
C
bool PLIB_SB_ExistsDMAPriority(
SB_MODULE_ID index
);
Description
This function identifies whether the DMAPriority feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_DMAPrioritySet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DMAPriority feature is supported on the device
• false - The DMAPriority feature is not supported on the device
Remarks
None.
5.6.21.6.5.3 PLIB_SB_ExistsInitPermGrp Function
C
bool PLIB_SB_ExistsInitPermGrp(
SB_MODULE_ID index
);
Description
This function identifies whether the InitPermGrp feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_InitPermGrpSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The InitPermGrp feature is supported on the device
• false - The InitPermGrp feature is not supported on the device
Remarks
None.
5.6.21.6.5.4 PLIB_SB_ExistsPGRegAddr Function
C
bool PLIB_SB_ExistsPGRegAddr(
SB_MODULE_ID index
);
Description
This function identifies whether the PGRegAddr feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_PGRegionAddrSet
• PLIB_SB_PGRegionAddrGet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGRegAddr feature is supported on the device
• false - The PGRegAddr feature is not supported on the device
Remarks
None.
5.6.21.6.5.5 PLIB_SB_ExistsPGRegRdPerm Function
C
bool PLIB_SB_ExistsPGRegRdPerm(
SB_MODULE_ID index
);
Description
This function identifies whether the PGRegRdPerm feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_PGRegionReadPermSet
• PLIB_SB_PGRegionReadPermClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGRegRdPerm feature is supported on the device
• false - The PGRegRdPerm feature is not supported on the device
Remarks
None.
5.6.21.6.5.6 PLIB_SB_ExistsPGRegSize Function
C
bool PLIB_SB_ExistsPGRegSize(
SB_MODULE_ID index
);
Description
This function identifies whether the PGRegSize feature is available on the SB module. When this function returns true, these
functions are supported on the device:
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• PLIB_SB_PGRegionSizeSet
• PLIB_SB_PGRegionSizeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGRegSize feature is supported on the device
• false - The PGRegSize feature is not supported on the device
Remarks
None.
5.6.21.6.5.7 PLIB_SB_ExistsPGRegWrPerm Function
C
bool PLIB_SB_ExistsPGRegWrPerm(
SB_MODULE_ID index
);
Description
This function identifies whether the PGRegWrPerm feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_PGRegionWritePermSet
• PLIB_SB_PGRegionWritePermClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGRegWrPerm feature is supported on the device
• false - The PGRegWrPerm feature is not supported on the device
Remarks
None.
5.6.21.6.5.8 PLIB_SB_ExistsPGVErrClear Function
C
bool PLIB_SB_ExistsPGVErrClear(
SB_MODULE_ID index
);
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Description
This function identifies whether the PGVErrClear feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_PGVErrorMulti
• PLIB_SB_PGVErrorCode
• PLIB_SB_PGVErrorLogClearSingle
• PLIB_SB_PGVErrorLogClearMulti
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGVErrClear feature is supported on the device
• false - The PGVErrClear feature is not supported on the device
Remarks
None.
5.6.21.6.5.9 PLIB_SB_ExistsPGVErrClrMulti Function
C
bool PLIB_SB_ExistsPGVErrClrMulti(
SB_MODULE_ID index
);
Description
This function identifies whether the PGVErrClrMulti feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_PGVErrorClearMulti
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGVErrClrMulti feature is supported on the device
• false - The PGVErrClrMulti feature is not supported on the device
Remarks
None.
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5.6.21.6.5.10 PLIB_SB_ExistsPGVErrClrSingle Function
C
bool PLIB_SB_ExistsPGVErrClrSingle(
SB_MODULE_ID index
);
Description
This function identifies whether the PGVErrClrSingle feature is available on the SB module. When this function returns true,
these functions are supported on the device:
• PLIB_SB_PGVErrorClearSingle
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGVErrClrSingle feature is supported on the device
• false - The PGVErrClrSingle feature is not supported on the device
Remarks
None.
5.6.21.6.5.11 PLIB_SB_ExistsPGVErrCmdCode Function
C
bool PLIB_SB_ExistsPGVErrCmdCode(
SB_MODULE_ID index
);
Description
This function identifies whether the PGVErrCmdCode feature is available on the SB module. When this function returns true,
these functions are supported on the device:
• PLIB_SB_PGVErrorCommandCode
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGVErrCmdCode feature is supported on the device
• false - The PGVErrCmdCode feature is not supported on the device
Remarks
None.
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5.6.21.6.5.12 PLIB_SB_ExistsPGVErrInitID Function
C
bool PLIB_SB_ExistsPGVErrInitID(
SB_MODULE_ID index
);
Description
This function identifies whether the PGVErrInitID feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_PGVErrorInitiatorID
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGVErrInitID feature is supported on the device
• false - The PGVErrInitID feature is not supported on the device
Remarks
None.
5.6.21.6.5.13 PLIB_SB_ExistsPGVErrPG Function
C
bool PLIB_SB_ExistsPGVErrPG(
SB_MODULE_ID index
);
Description
This function identifies whether the PGVErrPG feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_PGVErrorPermissionGroup
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGVErrPG feature is supported on the device
• false - The PGVErrPG feature is not supported on the device
Remarks
None.
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5.6.21.6.5.14 PLIB_SB_ExistsPGVErrRegion Function
C
bool PLIB_SB_ExistsPGVErrRegion(
SB_MODULE_ID index
);
Description
This function identifies whether the PGVErrRegion feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_PGVErrorRegion
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGVErrRegion feature is supported on the device
• false - The PGVErrRegion feature is not supported on the device
Remarks
None.
5.6.21.6.5.15 PLIB_SB_ExistsPGVErrRptPri Function
C
bool PLIB_SB_ExistsPGVErrRptPri(
SB_MODULE_ID index
);
Description
This function identifies whether the PGVErrRptPri feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_PGVErrorReportPrimaryEnable
• PLIB_SB_PGVErrorReportPrimaryDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGVErrRptPri feature is supported on the device
• false - The PGVErrRptPri feature is not supported on the device
Remarks
None.
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5.6.21.6.5.16 PLIB_SB_ExistsPGVErrStatus Function
C
bool PLIB_SB_ExistsPGVErrStatus(
SB_MODULE_ID index
);
Description
This function identifies whether the PGVErrStatus feature is available on the SB module. When this function returns true, these
functions are supported on the device:
• PLIB_SB_PGVErrorStatus
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PGVErrStatus feature is supported on the device
• false - The PGVErrStatus feature is not supported on the device
Remarks
None.
5.6.21.7 Files
Files
Name Description
plib_sb.h Defines the System Bus (SB) Peripheral Library interface
Description
5.6.21.7.1 plib_sb.h
System Bus Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
system bus (SB) peripheral library (PLIB) for Microchip microcontrollers. The definitions in this file are for the SB controller
module.
Functions
Name Description
PLIB_SB_CPUPrioritySet Sets the CPU arbitration policy to SRAM when servicing an interrupt
PLIB_SB_DMAPrioritySet Sets the DMA arbitration policy
PLIB_SB_ExistsCPUPriority Identifies whether the CPUPriority feature exists on the SB module
PLIB_SB_ExistsDMAPriority Identifies whether the DMAPriority feature exists on the SB module
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PLIB_SB_ExistsInitPermGrp Identifies whether the InitPermGrp feature exists on the SB module
PLIB_SB_ExistsPGRegAddr Identifies whether the PGRegAddr feature exists on the SB module
PLIB_SB_ExistsPGRegRdPerm Identifies whether the PGRegRdPerm feature exists on the SB module
PLIB_SB_ExistsPGRegSize Identifies whether the PGRegSize feature exists on the SB module
PLIB_SB_ExistsPGRegWrPerm Identifies whether the PGRegWrPerm feature exists on the SB module
PLIB_SB_ExistsPGVErrClear Identifies whether the PGVErrClear feature exists on the SB module
PLIB_SB_ExistsPGVErrClrMulti Identifies whether the PGVErrClrMulti feature exists on the SB module
PLIB_SB_ExistsPGVErrClrSingle Identifies whether the PGVErrClrSingle feature exists on the SB module
PLIB_SB_ExistsPGVErrCmdCode Identifies whether the PGVErrCmdCode feature exists on the SB
module
PLIB_SB_ExistsPGVErrInitID Identifies whether the PGVErrInitID feature exists on the SB module
PLIB_SB_ExistsPGVErrPG Identifies whether the PGVErrPG feature exists on the SB module
PLIB_SB_ExistsPGVErrRegion Identifies whether the PGVErrRegion feature exists on the SB module
PLIB_SB_ExistsPGVErrRptPri Identifies whether the PGVErrRptPri feature exists on the SB module
PLIB_SB_ExistsPGVErrStatus Identifies whether the PGVErrStatus feature exists on the SB module
PLIB_SB_InitPermGrpSet Sets the read/write permission group(s) for an initiator. The region must
also allow read/write access for the permission group for a read/write to
occur.
PLIB_SB_PGRegionAddrGet Returns the base address for a permission group region within a
target's physical address space.
PLIB_SB_PGRegionAddrSet Sets the base address for a permission group region within a target's
physical address space. Not all regions are programmable.
PLIB_SB_PGRegionReadPermClear Clears the permission bit(s) corresponding to the requested read
permissions for a permission group region within a target's physical
address space. Not all regions are programmable.
PLIB_SB_PGRegionReadPermSet Sets the permission bit(s) corresponding to the requested read
permissions for a permission group region within a target's physical
address space. Not all regions are programmable.
PLIB_SB_PGRegionSizeGet Returns the size for a permission group region within a target's physical
address space.
PLIB_SB_PGRegionSizeSet Sets the size for a permission group region within a target's physical
address space. Not all regions are programmable.
PLIB_SB_PGRegionWritePermClear Clears the permission bit(s) corresponding to the requested write
permissions for a permission group region within a target's physical
address space. Not all regions are programmable.
PLIB_SB_PGRegionWritePermSet Sets the permission bit(s) corresponding to the requested write
permissions for a permission group region within a target's physical
address space. Not all regions are programmable.
PLIB_SB_PGVErrorClearMulti Clears multiple permission group errors for the specified target.
PLIB_SB_PGVErrorClearSingle Clears a single permission group error for the specified target.
PLIB_SB_PGVErrorCode Returns a value corresponding to the type of error logged for the
specified target.
PLIB_SB_PGVErrorCommandCode Returns the OCP command code of the transaction that caused the
protection violation for the specified target.
PLIB_SB_PGVErrorInitiatorID Returns the ID of the Initiator that caused the protection violation
PLIB_SB_PGVErrorLogClearMulti Clears a multiple protection group violations error from the specified
target error log register.
PLIB_SB_PGVErrorLogClearSingle Clears a single protection group violation error from the specified target
error log register.
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PLIB_SB_PGVErrorMulti Indicates if more than one perimission group violation has occurred
since last cleared.
PLIB_SB_PGVErrorPermissionGroup Returns the permission group of the protection region in a target
address space that caused the protection violation for the specified
target.
PLIB_SB_PGVErrorRegion Returns the number of the protection region in the specified target
address space that caused the protection violation.
PLIB_SB_PGVErrorReportPrimaryDisable Disables primary permission group error reporting for the specified
target to the SB flag register.
PLIB_SB_PGVErrorReportPrimaryEnable Enables primary permission group error reporting for the specified
target to the SB flag register.
PLIB_SB_PGVErrorStatus Identifies whether a permission group violation has been reported for
the specified target.
File Name
plib_sb.h
Company
Microchip Technology Inc.
5.6.22 SPI Peripheral Library
5.6.22.1 Introduction
SPI Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Serial Peripheral Interface (SPI) module that is available on the Microchip
family of microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module
without the necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller
variant to another.
Description
The Serial Peripheral Interface (SPI) module is a synchronous serial interface useful for communicating with other peripherals or
microcontroller device. These peripheral devices may be serial EEPROMs, shift registers, display drivers, analog-to-digital
converters, etc.
SPI is a synchronous serial data link operating at full duplex Master/slave relationship.
Two data lines:
• MOSI – Master Data Output, Slave Data Onput
• MISO – Master Data Input, Slave Data Output
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Two control lines:
• SCLK – Clock
• /SS – Slave Select (no addressing)
Devices communicate in Master/Slave mode where the master device initiates the data frame. Multiple slave devices are allowed
with individual slave select (Chip Select) lines. The SPI is sometimes referred to as a "four-wire" serial bus, contrasting with
three-, two-, and one-wire serial buses.
5.6.22.2 Release Notes
MPLAB Harmony Version: v0.70b SPI Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.22.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.22.4 Using the Library
This topic describes the basic architecture of the SPI Peripheral Library and provides information and examples on how to use it.
Interface Header File: plib_spi.h
The interface to the SPI Peripheral Library is defined in the "plib_spi.h" header file, which is included by the "peripheral.h"
peripheral library header file. Any C language source (.c) file that uses the SPI Peripheral library must include "peripheral.h".
Library File:
The SPI Peripheral Library is part of the processor-specific peripheral library archive (.a) file installed with the compiler. Libraries
in this archive are automatically available to the linker (in the default search path) for any project built using the Microchip
compiler.
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5.6.22.4.1 Library Architecture
This library provides the low level abstraction of the SPI module available on the Microchip family of microcontrollers with a
convenient C language interface. This topic describes how that abstraction is modeled in the software and introduces the library
interface.
Note: The interface provided is a superset of all SPI functionality available on the device. Refer to the "Serial Peripheral
Interface (SPI)" chapter in the specific device data sheet for availability.
Description
The following diagram shows the general architecture of the SPI Peripheral Library.
The library interface routines are divided into various subsections, each of the subsection addresses one of the blocks or the
overall operation of the SPI module.
Library Interface Section Description
General Configuration and Status Functions This section provides a set of functions and data types for configuring the
SPI and to read the status of the SPI.
Data Transfer Functions This section provides a set of functions and data types for Reading and
Writing the SPI buffer values.
Transmitter Functions This section provides a set of functions for transmitter.
Receiver Functions This section provides a set of functions for receiver.
Framed Mode Functions Provides control, status, and data transfer routines for Framed SPI mode.
Audio Mode Functions Provides control, status routines to support audio protocol functionality.
Note: Not all modes are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
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5.6.22.4.2 Hardware Abstraction Model
This library provides a low-level abstraction of the SPI module on the Microchip family microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in software and introduces the library's interface.
Description
The SPI Peripheral Library provides interface routines to interact with the blocks shown in the following diagram.
Hardware Abstraction Model
The Serial Peripheral Interface (API) module is a synchronous serial interface useful for communicating with external peripherals
and other microcontroller devices.
The SPI bus specifies four logic signals:
• SCLK: serial clock (output from master)
• MOSI: master output, slave input (output from master)
• MISO: master input, slave output (output from slave)
• /SS: slave select (active low, output from master); on certain devices, this pin is implemented using general purpose I/O
(GPIO)
The SPI bus can operate with a single master device and with one or more slave devices.To begin a communication, the master
first configures the clock, using a frequency less than or equal to the maximum frequency the slave device supports.In addition to
setting the clock frequency, the master must also configure the clock polarity and phase with respect to the data.
The master then transmits the appropriate chip select bit for the desired chip to a logic '0'. A logic '0' is transmitted because the
Chip Select line (/SS) is active low, meaning its off state is a logic '1'; the on state is asserted with a logic 0. The master issues
the clock cycles.
During each SPI clock cycle, a full duplex data transmission occurs:
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• The master sends a bit on the MOSI line; the slave reads it from that same line
• The slave sends a bit on the MISO line; the master reads it from that same line
Transmissions may involve any number of clock cycles. When there are no more data to be transmitted, the master stops
toggling its clock. Normally, it then deselects the slave.
The Baud Rate Generator/Prescaler controls the timing, the desired baud rate can be programmed in the baud rate controller.
In the Master mode, the clock becomes the serial clock and is provided to external devices via the SCK pin (the clock can be
prescaled by the primary prescaler and the secondary prescaler if device supports).
The Buffers are for data transmitted or received by the SPI module over the MISO and MOSI line synchronized with the SCK
line by the clock control logic.
The Status and Control logic, provide the capability to control different ways of enabling or disabling the master and slave. It
also can provides status about the transmitter and receiver.
Active-Low Slave Select or Frame Synchronization I/O Pulse allows for a Synchronous Slave mode.
The SPI module supports the following four SPI modes.
• Standard Mode: In this mode of operation, data can be thought of as taking a direct path between the Most Significant bit
(MSb) of one module’s shift register and the Least Significant bit (LSb) of the other, and then into the appropriate Transmit or
Receive Buffer. The master provides the serial clock and synchronization signals required to the slave device.
• Enhanced Buffer Mode: The operation of this mode is very similar to that of Standard mode. The difference is that data can
be thought of as moving from the Shift register to a receive FIFO buffer and moving from the transmit FIFO buffer to the Shift
register.
• Framed Mode: In this mode of operation, the Frame Master controls the generation of the frame synchronization pulse and
provides this pulse to other devices at the Slave Select (/SS) pin. The SPI clock is generated by the SPI Master and is
continuously running. The SPI slave module uses a frame synchronization pulse received at the SS pin.
• Audio Protocol Mode: The SPI module provides support to the audio protocol modes; with this mode, the SPI module can be
interfaced to most codec devices available today to provide PIC microcontroller-based audio solutions
Note: Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3 How the Library Works
The SPI module has the following operating modes:
• Standard SPI
• Enhanced Buffer SPI
• Framed SPI
• Audio Protocol Interface
Note: Not all modes are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.1 State Machine
This state machine is provided to give a general idea of the usage model of the peripheral library. Refer to the usage model for
more detailed steps for the scenario that is being used.
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Description
SPI State Machine
The following state machine diagrams shows the transmission and reception during normal operation.
SPI Routines
State Associated Function
Setup and
Initialization
Initialize the SPI by setting prescalar/baud rate generator, interrupt modes.
Enable Master Once the SPI has been appropriately set up and initialized, the state machine enables Master mode
(PLIB_SPI_MasterEnable).
Select Slave Select slave by pulling the /SSx pin low to transmit the data.
Write Data To
Transfer
Write data to the buffer to transmit using PLIB_SPI_BufferWrite.
Wait for Transmit
Buffer to Clear
Buffer Data will be transmitted to transmit buffer and transmit buffer flag will be full. The state machine
waits for transmit buffer to clear. Check for status by calling PLIB_SPI_TransmitBufferIsFull.
Wait for Receive
Buffer Full to Set
Slave sends received data back to master. Upon data received receive buffer flag will set. The state
machine waits for Receive buffer to clear. Check for status by calling PLIB_SPI_ReceiveBufferIsFull.
Read Buffer Read the buffer using PLIB_SPI_BufferRead.
Enable Slave Select Enable slave select by calling PLIB_SPI_PinEnable.
Note: Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
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5.6.22.4.3.2 Standard SPI Mode
In Standard (legacy) Master and Slave modes, data can be thought of as taking a direct path between the Most Significant bit
(MSb) of one module’s shift register and the Least Significant bit (LSb) of the other, and then into the appropriate Transmit or
Receive buffer. The module configured as the master module provides the serial clock and synchronization signals (as required)
to the slave device.
5.6.22.4.3.2.1 Standard Master Mode
In Standard Master mode, the input clock is used as the serial clock. The serial clock is output via the SCK pin to slave devices.
Clock pulses are only generated when there is data to be transmitted.
Setup
1. Select on which edge of the clock data transmission occurs, using PLIB_SPI_OutputDataPhaseSelect and
PLIB_SPI_ClockPolaritySelect.
2. The clock is prescaled using PLIB_SPI_PrescalePrimarySelect/PLIB_SPI_PrescaleSecondarySelect, if supported by the
device.
3. If the module needs to operate as a Master, use PLIB_SPI_MasterEnable.
Example: Standard Master Mode Communication Setup
#define MY_SPI_ID SPI_ID_1
//Diable SPI
PLIB_SPI_Disable(MY_SPI_ID);
// Optional: Clear SPI interrupts and status flag.
//clear SPI buffer
PLIB_SPI_BufferClear (MY_SPI_ID);
// Configure General SPI Options
PLIB_SPI_StopInIdleDisable(MY_SPI_ID);
PLIB_SPI_PinEnable(MY_SPI_ID, SPI_PIN_SLAVE_SELECT|SPI_PIN_DATA_OUT);
PLIB_SPI_CommunicationWidthSelect(MY_SPI_ID, SPI_COMMUNICATION_WIDTH_16BITS);
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_ID,SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
PLIB_SPI_ClockPolaritySelect(MY_SPI_ID, SPI_CLOCK_POLARITY_IDLE_HIGH);
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_ID, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);
PLIB_SPI_MasterEnable(MY_SPI_ID);
PLIB_SPI_FramedCommunicationDisable(MY_SPI_ID);
// Optional: Enable interrupts.
// Enable the module
PLIB_SPI_Enable(MY_SPI_ID);
Transmission and Receive
Both data to be transmitted and data that is received are respectively written into, or read from, the SPI buffer.
1. Data to be transmitted is written to the SPI buffer(PLIB_SPI_BufferWrite).
2. When contents of buffer are moved to the shift register, the SPI transmit buffer full flag is cleared (this can be verified using
PLIB_SPI_TransmitBufferIsFull).
3. A series of 8/16/32 clock pulses shifts out 8/16/32 bits of transmit data from the shift register to the data out (SDO) pin and
simultaneously shifts in the data at the data in (SDI) pin into the shift register.
4. When the transfer is complete, the following events occur:
• The SPI interrupt flag is set. Interrupts will occur if SPI interrupts are enabled. The SPI interrupt flag is not cleared
automatically by the hardware.
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• Also, when the ongoing transmit and receive operation is completed, the contents of the shift register are moved to the SPI
receive register.
• The SPI receive buffer full flag (PLIB_SPI_ReceiveBufferIsFull) is set by the module, indicating that the receive buffer is
full. Once the SPI buffer is read by the user application using PLIB_SPI_BufferRead, the hardware clears the SPI receive
buffer full flag.
5. If the SPI receive buffer full flag is set when the SPI module needs to transfer data from SPI shift register to SPI receive
buffer, the module will set the SPI receive overflow flag (PLIB_SPI_ReceiverHasOverflowed), indicating an overflow condition.
6. Data to be transmitted can be written to SPI buffer (PLIB_SPI_BufferWrite) by the user software at any time as long as the
SPI Transmit buffer full flag is clear (PLIB_SPI_TransmitBufferIsFull). The write can occur while SPI shift register is shifting
out the previously written data, allowing continuous transmission.
Example: Standard Master Mode Communication Transfer
#define MY_SPI_ID SPI_ID_1
uint16_t data;
data = 0x00ac;
// write to buffer for TX
PLIB_SPI_BufferWrite (MY_SPI_ID,data);
// Either Poll for Receiver buffer to be full using
// PLIB_SPI_ReceiveBufferIsFull or wait for the interrupt
// Read the received value
data = PLIB_SPI_BufferRead (MY_SPI_ID);
Notes:
1. Refer to the "Interrupts" section in the related family reference manual or device data sheet for details on how to clear and
enable the SPI module interrupts and flags.
2. MY_SPI_ID is the SPI instance selected for use by the application developer.
3. Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.2.2 Standard Slave Mode
Slave Select Synchronization
The Slave Select pin (/SS) allows for Synchronous Slave mode. If the slave select is enabled (PLIB_SPI_PinEnable),
transmission and reception are enabled in Slave mode only if the /SS pin is driven to a low state. The port output or other
peripheral outputs must not be driven in order to allow the /SS pin to function as an input. If the slave select is enabled and the
/SS pin is driven high, the data output (SDO) pin is no longer driven and will tri-state even if the module is in the middle of a
transmission. An aborted transmission will be retried the next time the /SS pin is driven low, using the data held in the SPI
Transmit buffer. If slave select is not enabled, the /SS pin does not affect the module operation in Slave mode.
SPI Trasmit Buffer Full Status Operation
The function of the SPI Trasmit buffer full (PLIB_SPI_TransmitBufferIsFull) is different in the Slave mode of operation. If slave
select is disabled (PLIB_SPI_PinDisable), the PLIB_SPI_TransmitBufferIsFull returns a '1' when the SPI buffer is loaded by the
user application. It is cleared when the module transfers data from SPI transmit buffer to SPI shift register. This is similar to the
SPI Trasmit buffer full function in Master mode.
If slave select is enabled (PLIB_SPI_PinEnable), PLIB_SPI_TransmitBufferIsFull returns a '1' when the SPI buffer is loaded by
the user application. However,PLIB_SPI_TransmitBufferIsFull returns zero only when the SPI module completes data
transmission. A transmission will be aborted when the Slave Select pin goes high and may be retried at a later time. Each data
word is held in SPI transmit buffer until all bits are transmitted to the receiver.
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Setup
In Standard Slave mode, data is transmitted and received as the external clock pulses appear on the SCK pin. The clock polarity
and clock edge (PLIB_SPI_ClockPolaritySelect) determine upon which edge of the clock data transmission occurs.
Example: Standard Slave Mode Communication Setup
#define MY_SPI_ID SPI_ID_1
//Diable SPI
PLIB_SPI_Disable(MY_SPI_ID);
// Optional: Clear SPI interrupts and status flag.
//clear SPI buffer
PLIB_SPI_BufferClear (MY_SPI_ID);
// Configure General SPI Options
PLIB_SPI_StopInIdleDisable(MY_SPI_ID);
PLIB_SPI_PinEnable(MY_SPI_ID,SPI_PIN_DATA_OUT|SPI_PIN_SLAVE_SELECT);
PLIB_SPI_CommunicationWidthSelect(MY_SPI_ID, SPI_COMMUNICATION_WIDTH_16BITS);
// SMP must be cleared when SPI is used in Slave mode
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_ID,SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
PLIB_SPI_ClockPolaritySelect(MY_SPI_ID, SPI_CLOCK_POLARITY_IDLE_HIGH);//clock polarity and
edge is subject to change ...
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_ID, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);//
... based on your communication mode.
PLIB_SPI_SlaveEnable(MY_SPI_ID);
PLIB_SPI_FramedCommunicationDisable(MY_SPI_ID);
// Optional: Enable interrupts.
// Enable the module
PLIB_SPI_Enable(MY_SPI_ID);
Transmission and Receive
Both data to be transmitted and data that is received are respectively written into, or read from, the SPI buffer
(PLIB_SPI_BufferWrite/ PLIB_SPI_BufferRead). The remainder of the operation of the module is identical to that of Standard
Master mode.
Example: Standard Slave Mode Communication Receive
#define MY_SPI_ID SPI_ID_1
uint16_t data;
if(PLIB_SPI_ReceiverHasOverflowed(MY_SPI_ID))
{
// error
PLIB_SPI_ReceiverOverflowClear(MY_SPI_ID);// clear overflow
data = PLIB_SPI_BufferRead (MY_SPI_ID);
}
else if (!PLIB_SPI_ReceiverBufferIsFull(MY_SPI_ID))
{
// error
}
else
{
data = PLIB_SPI_BufferRead (MY_SPI_ID); // read data
while(PLIB_SPI_TransmitBufferIsFull(MY_SPI_ID));
PLIB_SPI_BufferWrite(MY_SPI_ID, data); // send back
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}
Notes:
1. Refer to the "Interrupts" section in the related family reference manual or device data sheet for details on how to clear and
enable the SPI module interrupts and flags.
2. MY_SPI_ID is the SPI instance selected for use by the application developer.
3. Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.3 Enhanced Buffer SPI Mode
The operation of Enhanced Buffer Master and Slave modes is very similar to Standard Master and Slave modes. The difference
is that data can be thought of as moving from the Shift register to a receive FIFO buffer and moving from the transmit FIFO
buffer to the Shift register.
5.6.22.4.3.3.1 Enhanced Buffer Master Mode
In Enhanced Buffer Master mode (referred to as a FIFO), the input clock used as the serial clock. The serial clock is output via
the SCK pin to slave devices. Clock pulses are only generated when there is data to be transmitted.
Setup
1. Select on which edge of the clock data transmission occurs, using PLIB_SPI_OutputDataPhaseSelect and
PLIB_SPI_ClockPolaritySelect.
2. The clock is prescaled using PLIB_SPI_PrescalePrimarySelect/PLIB_SPI_PrescaleSecondarySelect, or the clock is
generated using PLIB_SPI_BaudRateClockSelect, if supported by the device.
3. If the module needs to operate as a Master, use PLIB_SPI_MasterEnable.
Example: Enhanced Master Mode Communication Setup
#define MY_SPI_ID SPI_ID_1
//Diable SPI
PLIB_SPI_Disable(MY_SPI_ID);
// Optional: Clear SPI interrupts and status flag.
//clear SPI buffer
PLIB_SPI_BufferClear (MY_SPI_ID);
// Configure General SPI Options
PLIB_SPI_StopInIdleDisable(MY_SPI_ID);
PLIB_SPI_PinEnable(MY_SPI_ID, SPI_PIN_SLAVE_SELECT|SPI_PIN_DATA_OUT);
PLIB_SPI_CommunicationWidthSelect(MY_SPI_ID, SPI_COMMUNICATION_WIDTH_16BITS);
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_ID,SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
PLIB_SPI_ClockPolaritySelect(MY_SPI_ID, SPI_CLOCK_POLARITY_IDLE_HIGH);
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_ID, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);
PLIB_SPI_MasterEnable(MY_SPI_ID);
PLIB_SPI_FramedCommunicationDisable(MY_SPI_ID);
PLIB_SPI_FIFOEnable(MY_SPI_ID);
// Optional: Enable interrupts.
// Enable the module
PLIB_SPI_Enable(MY_SPI_ID);
The CPU loads data to be transmitted into the transmit buffer by writing the SPI buffer (PLIB_SPI_BufferWrite). An SPI
transmission begins after the first buffer write. Up to all pending transmissions can be loaded. The number of pending transfers is
indicated by the Buffer Element Count bits through PLIB_SPI_FIFOCountGet.
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In Master mode, this count reflects the number of transfers pending in the transmit buffer. In Slave mode, it reflects the number
of unread receptions in the receive buffer. If the Shift register is empty, the first write will immediately load the Shift register,
leaving all transmit buffer locations available.
After an SPI transfer completes, the receive buffer location is updated with the received data. The CPU accesses the received
data by reading the SPI buffer. After each CPU read, the SPI buffer points to the next buffer location. SPI transfers continue until
all pending data transfers have completed.
Transmission and Receive
Both data to be transmitted and data that is received are respectively written into, or read from, the SPI buffer.
1. Data to be transmitted is written to the SPI buffer(PLIB_SPI_BufferWrite) and is loaded into the next available transmit buffer
location.
2. The SPI transmit buffer full flag (PLIB_SPI_TransmitBufferIsFull) and SPI interrupt flag are set after pending transfers are
loaded.
3. The current buffer location’s contents are moved to the Shift register. The SPI transmit buffer is cleared by the module if a
buffer location is available for a CPU write.
4. A series of 8/16/32 clock pulses shifts out 8/16/32 bits of transmit data from the shift register to the data out (SDO) pin and
simultaneously shifts in the data at the data in (SDI) pin into the shift register.
5. When the transfer is complete, the following events occur:
• The contents of the SPI shift register are moved into the next available location in the receive buffer.
• If the last unread location is written by the SPI module, the SPI receive buffer full flag (PLIB_SPI_ReceiveBufferIsFull) is
set, indicating that all buffer locations are full. Enable the SPI interrupts. The SPI interrupt flag is not cleared automatically
by the hardware.
• Once the SPI buffer is read (PLIB_SPI_BufferRead) by the user application, the hardware clears the SPI receive buffer full
flag (PLIB_SPI_ReceiveBufferIsFull) and the SPI Buffer increments to the next unread receive buffer location. SPI buffer
reads beyond the last unread location will not increment the buffer location.
6. When PLIB_SPI_ReceiveBufferIsFull is set, if the SPI module needs to transfer one more data from SPI shift register to the
buffer, the module will enable the receive overflow flag (PLIB_SPI_ReceiverHasOverflowed) indicating an overflow condition.
7. Data to be transmitted can be written to the SPI buffer (PLIB_SPI_BufferWrite) by the user application at any time as long as
the SPI transmit buffer full flag is clear (PLIB_SPI_TransmitBufferIsFull). Up to all pending transfers can be loaded into the
buffer allowing continuous transmission.
Example: Enhanced Master Mode communication Transfer
#define MY_SPI_ID SPI_ID_1
uint16_t data;
data = 0x00ac;
// write to buffer for TX
PLIB_SPI_BufferWrite (MY_SPI_ID,data);
// Either Poll for Receiver buffer to be full using
// PLIB_SPI_ReceiveBufferIsFull or wait for the interrupt
// Read the received value
data = PLIB_SPI_BufferRead (MY_SPI_ID);
Notes:
1. Refer to the "Interrupts" section in the related family reference manual or device data sheet for details on how to clear and
enable the SPI module interrupts and flags.
2. MY_SPI_ID is the SPI instance selected for use by the application developer.
3. Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
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data sheet for availability.
5.6.22.4.3.3.2 Enhanced Buffer Slave Mode
Slave Select Synchronization
The Slave Select pin allows a Synchronous Slave mode. If the slave select enabled (PLIB_SPI_PinEnable), transmission and
reception is enabled in Slave mode only if the /SS pin is driven to a low state. The port output or other peripheral outputs must
not be driven in order to allow the /SS pin to function as an input. If the slave select is enabled and the /SS pin is driven high, the
SDO pin is no longer driven and will tri-state even if the module is in the middle of a transmission. An aborted transmission will
be retried the next time the /SS pin is driven low using the data held in the SPI transmit buffer. If the Slave select is disabled
(PLIB_SPI_PinDisable), the /SS pin does not affect the module operation in Slave mode.
SPI Transmit Buffer Full Operation
The function of the SPI transmit buffer full flag (PLIB_SPI_TransmitBufferIsFull) is different in the Slave mode of operation. If
Slave select is disabled (PLIB_SPI_PinDisable), the SPI Transmit Buffer Full flag (PLIB_SPI_TransmitBufferIsFull) is set when
the last available buffer location is loaded by the user application. It is cleared when the module transfers data from the buffer to
SPI status register and a buffer location is available for a CPU write. This is similar to the SPI transmit buffer in Master mode.
If Slave select is enabled (PLIB_SPI_PinEnable), the SPI transmit buffer is set when the last available buffer location is loaded
by the user application. However, it is cleared only when the SPI module completes data transmission, leaving a buffer location
available for a CPU write. A transmission will be aborted when the /SS pin goes high and may be retried at a later time. Each
data word is held in the buffer until all bits are transmitted to the receiver.
Setup
In Slave mode, data is transmitted and received as the external clock pulses appear on the SCK pin.
PLIB_SPI_OutputDataPhaseSelect and PLIB_SPI_ClockPolaritySelect determine upon which edge of the clock data
transmission occurs. The rest of the operation of the module is identical to that of Enhanced Buffer Master mode.
Example: Enhanced Slave Mode communication Setup
#define MY_SPI_ID SPI_ID_1
//Diable SPI
PLIB_SPI_Disable(MY_SPI_ID);
// Optional: Clear SPI interrupts and status flag.
//clear SPI buffer
PLIB_SPI_BufferClear (MY_SPI_ID);
// Configure General SPI Options
PLIB_SPI_StopInIdleDisable(MY_SPI_ID);
PLIB_SPI_CommunicationWidthSelect(MY_SPI_ID, SPI_COMMUNICATION_WIDTH_16BITS);
// SMP must be cleared when SPI is used in Slave mode
PLIB_SPI_PinEnable(MY_SPI_ID,SPI_PIN_DATA_OUT|SPI_PIN_SLAVE_SELECT);
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_ID,SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
PLIB_SPI_ClockPolaritySelect(MY_SPI_ID, SPI_INPUT_SAMPLING_PHASE_AT_END);//clock polarity and
edge is subject to change ...
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_ID, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);//
... based on your communication mode.
PLIB_SPI_SlaveEnable(MY_SPI_ID);
PLIB_SPI_FramedCommunicationDisable(MY_SPI_ID);
PLIB_SPI_FIFOEnable(MY_SPI_ID);
// Optional: Enable interrupts.
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// Enable the module
PLIB_SPI_Enable(MY_SPI_ID);
Transmission and Receive:
Both data to be transmitted and data that is received are respectively written into, or read from, the SPI buffer
(PLIB_SPI_BufferWrite/ PLIB_SPI_BufferRead). The remainder of the operation of the module is identical to that of Enhanced
Buffer Master mode.
Example: Enhanced Slave Mode communication Receive
#define MY_SPI_ID SPI_ID_1
uint16_t data;
if(PLIB_SPI_ReceiverHasOverflowed(MY_SPI_ID))
{
// error
PLIB_SPI_ReceiverOverflowClear(MY_SPI_ID);// clear overflow
data = PLIB_SPI_BufferRead (MY_SPI_ID);
}
else if (!PLIB_SPI_ReceiverBufferIsFull(MY_SPI_ID))
{
// error
}
else
{
data = PLIB_SPI_BufferRead (MY_SPI_ID); // read data
while(PLIB_SPI_TransmitBufferIsFull(MY_SPI_ID));
PLIB_SPI_BufferWrite(MY_SPI_ID, data); // send back
}
Notes:
1. Refer to the "Interrupts" section in the related family reference manual or device data sheet for details on how to clear and
enable the SPI module interrupts and flags.
2. MY_SPI_ID is the SPI instance selected for use by the application developer.
3. Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.4 Framed SPI Modes
The SPI module supports a basic framed SPI protocol while operating in either Master or Slave modes.
Description
The SPI module supports two framed modes of operation. In Frame Master mode, the SPI module generates the frame
synchronization pulse and provides this pulse to other devices at the /SS pin. In Frame Slave mode, the SPI module uses a
frame synchronization pulse received at the /SS pin.
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The framed SPI modes are supported in conjunction with the unframed Master and Slave modes. This makes four framed SPI
configurations:
• SPI Master mode and Frame Master mode
• SPI Master mode and Frame Slave mode
• SPI Slave mode and Frame Master mode
• SPI Slave mode and Frame Slave mode
These modes determine whether or not the SPI module generates the serial clock and the frame synchronization pulse.
5.6.22.4.3.4.1 SPI Master Mode and Frame Master Mode
In Master/Frame Master mode, the SPI module generates both the clock and frame synchronization signals, as shown in the
following figure.
In this mode, the serial clock is output continuously at the SCK pin, regardless of whether the module is transmitting. When the
SPI buffer is written (PLIB_SPI_BufferWrite), the /SS pin will be driven to its active state on the appropriate transmit edge of the
SCK clock, and remain active for one data frame. If the PLIB_SPI_FrameSyncPulseEdgeSelect function decides whether sync
pulse precedes the data transmission or coincides with the beginning of the data transmission. The module starts transmitting
data on the next transmit edge of the SCK.
Setup
The mode is enabled by calling PLIB_SPI_MasterEnable, PLIB_SPI_FramedCommunicationEnable and
PLIB_SPI_FrameSyncPulseDirectionSelect (as output).
Example: SPI Master Mode and Frame Master Mode Communication Setup
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#define MY_SPI_ID SPI_ID_1
//Diable SPI
PLIB_SPI_Disable(MY_SPI_ID);
// Optional: Clear SPI interrupts and status flag.
//clear SPI buffer
PLIB_SPI_BufferClear (MY_SPI_ID);
// Configure General SPI Options
PLIB_SPI_StopInIdleDisable(MY_SPI_ID);
PLIB_SPI_PinEnable(MY_SPI_ID, SPI_PIN_SLAVE_SELECT|SPI_PIN_DATA_OUT);
PLIB_SPI_CommunicationWidthSelect(MY_SPI_ID, SPI_COMMUNICATION_WIDTH_16BITS);
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_ID,SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
PLIB_SPI_ClockPolaritySelect(MY_SPI_ID, SPI_CLOCK_POLARITY_IDLE_HIGH);
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_ID, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);
PLIB_SPI_MasterEnable(MY_SPI_ID);
PLIB_SPI_FramedCommunicationEnable(MY_SPI_ID);
PLIB_SPI_FrameSyncPulseDirectionSelect(MY_SPI_ID, SPI_FRAME_PULSE_DIRECTION_INPUT);
// Optional: Enable interrupts.
// Enable the module
PLIB_SPI_Enable(MY_SPI_ID);
Transmission and Receive
Both data to be transmitted and data that is received are respectively written into, or read from, the SPI buffer.
Example: SPI Master Mode and Frame Master Mode Communication Transfer
#define MY_SPI_ID SPI_ID_1
uint16_t data;
data = 0x00ac;
// write to buffer for TX
PLIB_SPI_BufferWrite (MY_SPI_ID,data);
// Either Poll for Receiver buffer to be full using
// PLIB_SPI_ReceiveBufferIsFull or wait for the interrupt
// Read the received value
data = PLIB_SPI_BufferRead (MY_SPI_ID);
Notes:
1. Refer to the "Interrupts" section in the related family reference manual or device data sheet for details on how to clear and
enable the SPI module interrupts and flags.
2. MY_SPI_ID is the SPI instance selected for use by the application developer.
3. Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.4.2 SPI Master Mode and Frame Slave Mode
In Master/Frame Slave mode, the module generates the clock signal but uses the slave module’s frame synchronization signal
for data transmission, as shown in the following figure.
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In this mode, the /SS pin is an input and it is sampled on the sample edge of the SPI clock.When it is sampled in its active state,
data will be transmitted on the subsequent transmit edge of the SPI clock. The SPI interrupt flag is set when the transmission is
complete. The user application must make sure that the correct data is loaded into the SPI buffer for transmission before the
signal is received at the /SS pin.
Setup
The mode is enabled by calling PLIB_SPI_MasterEnable, PLIB_SPI_FramedCommunicationEnable, and
PLIB_SPI_FrameSyncPulseDirectionSelect.
Example: SPI Master Mode and Frame Slave Mode Communication Setup
#define MY_SPI_ID SPI_ID_1
//Diable SPI
PLIB_SPI_Disable(MY_SPI_ID);
// Optional: Clear SPI interrupts and status flag.
//clear SPI buffer
PLIB_SPI_BufferClear (MY_SPI_ID);
// Configure General SPI Options
PLIB_SPI_StopInIdleDisable(MY_SPI_ID);
PLIB_SPI_PinEnable(MY_SPI_ID, SPI_PIN_SLAVE_SELECT|SPI_PIN_DATA_OUT);
PLIB_SPI_CommunicationWidthSelect(MY_SPI_ID, SPI_COMMUNICATION_WIDTH_16BITS);
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_ID,SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
PLIB_SPI_ClockPolaritySelect(MY_SPI_ID, SPI_CLOCK_POLARITY_IDLE_HIGH);
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_ID, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);
PLIB_SPI_FrameSyncPulseCounterSelect(MY_SPI_ID,SPI_FRAME_SYNC_PULSE_ON_EVERY_8_DATA_CHARACTER);
PLIB_SPI_MasterEnable(MY_SPI_ID);
PLIB_SPI_FramedCommunicationEnable(MY_SPI_ID);
PLIB_SPI_FrameSyncPulseDirectionSelect(MY_SPI_ID,SPI_FRAME_PULSE_DIRECTION_INPUT);
// Optional: Enable interrupts.
// Enable the module
PLIB_SPI_Enable(MY_SPI_ID);
Transmission and Receive
Both data to be transmitted and data that is received are respectively written into, or read from, the SPI buffer.
Example: SPI Master Mode and Frame Slave Mode Communication Transfer
#define MY_SPI_ID SPI_ID_1
uint16_t data;
data = 0x00ac;
// write to buffer for TX
PLIB_SPI_BufferWrite (MY_SPI_ID,data);
// Either Poll for Receiver buffer to be full using
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// PLIB_SPI_ReceiveBufferIsFull or wait for the interrupt
// Read the received value
data = PLIB_SPI_BufferRead (MY_SPI_ID);
Notes:
1. Refer to the "Interrupts" section in the related family reference manual or device data sheet for details on how to clear and
enable the SPI module interrupts and flags.
2. MY_SPI_ID is the SPI instance selected for use by the application developer.
3. Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.4.3 SPI Slave Mode and Frame Master Mode
In Slave/Frame Master mode, the module acts as the SPI slave and takes its clock from the other SPI module; however, it
produces frame synchronization signals to control data transmission, as shown in the following figure.
The input SPI clock will be continuous in Slave mode. The /SS pin will be an output when the Frame sync pulse is output.
Therefore, when the SPI buffer is written, the module drives the /SS pin to the active state on the appropriate transmit edge of
the SPI clock for one SPI clock cycle. Data will start transmitting on the appropriate SPI clock transmit edge.
Setup
The mode is enabled by calling PLIB_SPI_SlaveEnable, PLIB_SPI_FramedCommunicationEnable, and
PLIB_SPI_FrameSyncPulseDirectionSelect.
Example: SPI Slave Mode and Frame Master Mode Communication Setup
#define MY_SPI_ID SPI_ID_1
//Diable SPI
PLIB_SPI_Disable(MY_SPI_ID);
// Optional: Clear SPI interrupts and status flag.
//clear SPI buffer
PLIB_SPI_BufferClear (MY_SPI_ID);
// Configure General SPI Options
PLIB_SPI_StopInIdleDisable(MY_SPI_ID);
PLIB_SPI_PinEnable(MY_SPI_ID,SPI_PIN_DATA_OUT|SPI_PIN_SLAVE_SELECT);
PLIB_SPI_CommunicationWidthSelect(MY_SPI_ID, SPI_COMMUNICATION_WIDTH_16BITS);
// SMP must be cleared when SPI is used in Slave mode
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_ID,SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
PLIB_SPI_ClockPolaritySelect(MY_SPI_ID, SPI_CLOCK_POLARITY_IDLE_HIGH);//clock polarity and
edge is subject to change ...
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_ID, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);//
... based on your communication mode.
PLIB_SPI_FrameSyncPulseCounterSelect(MY_SPI_ID,SPI_FRAME_SYNC_PULSE_ON_EVERY_8_DATA_CHARACTER);
PLIB_SPI_SlaveEnable(MY_SPI_ID);
PLIB_SPI_FramedCommunicationEnable(MY_SPI_ID);
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PLIB_SPI_FrameSyncPulseDirectionSelect(MY_SPI_ID,SPI_FRAME_PULSE_DIRECTION_INPUT);
// Optional: Enable interrupts.
// Enable the module
PLIB_SPI_Enable(MY_SPI_ID);
Transmission and Receive
Both data to be transmitted and data that is received are respectively written into, or read from, the SPI buffer.
Example: SPI Slave Mode and Frame Master Mode Communication Receive
#define MY_SPI_ID SPI_ID_1
uint16_t data;
if(PLIB_SPI_ReceiverHasOverflowed(MY_SPI_ID))
{
// error
PLIB_SPI_ReceiverOverflowClear(MY_SPI_ID);// clear overflow
data = PLIB_SPI_BufferRead (MY_SPI_ID);
}
else if (!PLIB_SPI_ReceiverBufferIsFull(MY_SPI_ID))
{
// error
}
else
{
data = PLIB_SPI_BufferRead (MY_SPI_ID); // read data
while(PLIB_SPI_TransmitBufferIsFull(MY_SPI_ID));
PLIB_SPI_BufferWrite(MY_SPI_ID, data); // send back
}
Notes:
1. Refer to the"Interrupts" section in the related family reference manual or device data sheet for details on how to clear and
enable the SPI module interrupts and flags.
2. MY_SPI_ID is the SPI instance selected for use by the application developer.
3. Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.4.4 SPI Slave Mode and Frame Master Mode
In Slave/Frame Slave mode, the module obtains both its clock and frame synchronization signal from the master module, as
shown in the following figure.
In this mode, both the clock and Slave Select pins will be inputs. The /SS pin is sampled on the sample edge of the SPI clock.
When /SS is sampled at its active state, data will be transmitted on the appropriate transmit edge of SCK.
Setup
The mode is enabled by calling PLIB_SPI_SlaveEnable,PLIB_SPI_FramedCommunicationEnable and
PLIB_SPI_FrameSyncPulseDirectionSelect (as input).
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Example: SPI Slave Mode and Frame Slave Mode Communication Setup
#define MY_SPI_ID SPI_ID_1
//Diable SPI
PLIB_SPI_Disable(MY_SPI_ID);
// Optional: Clear SPI interrupts and status flag.
//clear SPI buffer
PLIB_SPI_BufferClear (MY_SPI_ID);
// Configure General SPI Options
PLIB_SPI_StopInIdleDisable(MY_SPI_ID);
PLIB_SPI_PinEnable(MY_SPI_ID,SPI_PIN_DATA_OUT|SPI_PIN_SLAVE_SELECT);
PLIB_SPI_CommunicationWidthSelect(MY_SPI_ID, SPI_COMMUNICATION_WIDTH_16BITS);
// SMP must be cleared when SPI is used in Slave mode
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_ID,SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
PLIB_SPI_ClockPolaritySelect(MY_SPI_ID, SPI_CLOCK_POLARITY_IDLE_HIGH);//clock polarity and
edge is subject to change ...
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_ID, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);//
... based on your communication mode.
PLIB_SPI_FrameSyncPulseCounterSelect(MY_SPI_ID,SPI_FRAME_SYNC_PULSE_ON_EVERY_8_DATA_CHARACTER);
PLIB_SPI_SlaveEnable(MY_SPI_ID);
PLIB_SPI_FramedCommunicationEnable(MY_SPI_ID);
PLIB_SPI_FrameSyncPulseDirectionSelect(MY_SPI_ID,SPI_FRAME_PULSE_DIRECTION_INPUT);
// Optional: Enable interrupts.
// Enable the module
PLIB_SPI_Enable(MY_SPI_ID);
Transmission and Receive
Both data to be transmitted and data that is received are respectively written into, or read from, the SPI buffer.
Example: SPI Slave Mode and Frame Slave Mode Communication Receive
#define MY_SPI_ID SPI_ID_1
uint16_t data;
if(PLIB_SPI_ReceiverHasOverflowed(MY_SPI_ID))
{
// error
PLIB_SPI_ReceiverOverflowClear(MY_SPI_ID);// clear overflow
data = PLIB_SPI_BufferRead (MY_SPI_ID);
}
else if (!PLIB_SPI_ReceiverBufferIsFull(MY_SPI_ID))
{
// error
}
else
{
data = PLIB_SPI_BufferRead (MY_SPI_ID); // read data
while(PLIB_SPI_TransmitBufferIsFull(MY_SPI_ID));
PLIB_SPI_BufferWrite(MY_SPI_ID, data); // send back
}
Notes:
1. Refer to the "Interrupts" section in the related family reference manual or device data sheet for details on how to clear and
enable the SPI module interrupts and flags.
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2. MY_SPI_ID is the SPI instance selected for use by the application developer.
3. Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.5 Audio Protocol Interface Mode
The SPI module can be interfaced to most codec devices available today to provide PIC microcontroller-based audio solutions.
Description
The SPI module provides support to the audio protocol functionality via four standard I/O pins. The four pins that make up the
audio protocol interface modes are:
• SDIx: Serial Data Input for receiving sample digital audio data
• SDOx: Serial Data Output for transmitting digital audio data
• SCKx: Serial Clock (also known as bit clock)
• /SSx: Left/Right Channel Clock
The SPI module supports four audio protocol modes and can be operated in any one of these modes:
Note: Each of the modes can additionally support some or all of the features listed below. Please refer to the"Serial Peripheral
Interface (SPI)" chapter in the specific device data sheet for more information.
I2S Mode
The Inter-IC Sound (I2S) protocol enables transmission of two channels of digital audio data over a single serial interface. The
I
2S specification defines a half-duplex interface that supports transmit or receive, but not both at the same time. With both SDO
and SDI available, full-duplex operation is supported by this peripheral, as shown in the following figure.
Data Transmit and Clocking:
• The transmitter shifts the audio sample data’s Most Significant bit (MSb) on the first falling edge of SCK after an LRCK
transition
• The receiver samples the MSB on the second rising edge of SCK
• The left channel data shifts out while LRCK is low and right channel data is shifted out while LRCK is high
• The data in the left and right channel consists of a single frame
To set the module to I2S mode, the following bits must be set:
• Set SPI to I2S Mode by calling PLIB_SPI_AudioProtocolModeSelect
• Select PLIB_SPI_FrameSyncPulsePolaritySelect (as active low)
• Select PLIB_SPI_ClockPolaritySelect (as active low)
Setting these bits enables the SDO and LRCK (/SSx) transitions to occur on the falling edge of SCK (BCLK) and sampling of SDI
to occur on the rising edge of SCK.
Left-Justified Mode
The Left-Justified mode is similar to I2S mode; however, in this mode, the SPI shifts the audio data’s MSb on the first SCK edge
that is coincident with an LRCK transition. On the receiver side, the SPI module samples the MSb on the next SCK edge.
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In general, a codec using justified protocols defaults to transmitting data on the rising edge of SCK and receiving data on the
falling edge of SCK.
To set the module to Left-Justified mode, the following bits must to be set
• Set SPI to Left Justified Mode by calling PLIB_SPI_AudioProtocolModeSelect
• Select PLIB_SPI_FrameSyncPulsePolaritySelect (as active high)
• Select PLIB_SPI_ClockPolaritySelect (as active high)
This enables the SDO and LRCK transitions to occur on the rising edge of SCK. Refer to the following sample waveform
diagrams for 16-, 24-, and 32-bit audio data transfers.
Right-Justified Mode
In Right-Justified mode, the SPI module shifts the audio sample data’s MSb after aligning the data to the last clock cycle. The
bits preceding the audio sample data can be driven to logic level 0 .
To set the module to Right-Justified mode, the following bits must to be set:
• Set SPI to Right Justified Mode by calling PLIB_SPI_AudioProtocolModeSelect
• Select PLIB_SPI_FrameSyncPulsePolaritySelect (as active high)
• Select PLIB_SPI_ClockPolaritySelect (as active high)
This enables the SDO and LRCK transitions to occur on the rising edge of SCK after the Least Significant bit (LSb) being aligned
to the last clock cycle. Refer to the following sample waveform diagrams for 16-, 24-, and 32-bit audio data transfers.
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PCM/DSP Mode
This mode modifies the behavior of LRCK and audio data spacing. In PCM/DSP mode, the LRCK can be a single bit wide (i.e., 1
SCK) or as wide as the audio data (16-, 24-, and 32-bits). The audio data is packed in the frame with the left channel data
immediately followed by the right channel data. The frame length is still either 32 or 64 clocks when this device is the master.
In PCM/DSP mode, the transmitter drives the audio data’s (left channel) MSb on the first or second transmit edge of SCK (after
an LRCK transition). Immediately after the (left channel) LSb, the transmitter drives the (right channel) MSb.
To set the module to Left-Justified mode, the following bit must to be set:
• Set the SPI module to Right-Justified Mode by calling PLIB_SPI_AudioProtocolModeSelect
Refer to the following sample waveform for 16-, 24-, and 32-bit audio data transfers.
Mono Mode Versus Stereo Mode
The SPI module enables the audio data transmission in Mono or Stereo mode by setting PLIB_SPI_AudioTransmitModeSelect.
In Stereo mode, the shift register uses each FIFO location once, which gives each channel a unique stream of data for stereo
data. In Mono mode, the shift register uses each FIFO location twice, to give each channel the same mono stream of audio data.
5.6.22.4.3.5.1 Master Mode
A few characteristics of Master mode are:
• This mode enables the device to generate SCK and LRCK pulses as long as the master mode enabled
• The SPI module generates LRCK and SCK continuously in all the cases, regardless of the transmit data while in Master mode
• The SPI module drives the leading edge of LRCK and SCK within 1 SCK period and the serial data shifts in and out
continuously even when the Transmit FIFO is empty
The following figure shows a typical interface between the master and slave while in Master mode.
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Setup
To configure the device in Audio Protocol Master, enable master mode through PLIB_SPI_MasterEnable and enable audio mode
through PLIB_SPI_AudioProtocolEnable.
Example: Audio Mode Communication Setup
#define MY_SPI_ID SPI_ID_1
//Diable SPI
PLIB_SPI_Disable(MY_SPI_ID);
// Optional: Clear SPI interrupts and status flag.
//clear SPI buffer
PLIB_SPI_BufferClear (MY_SPI_ID);
// Configure General SPI Options
PLIB_SPI_StopInIdleDisable(MY_SPI_ID);
PLIB_SPI_PinEnable(MY_SPI_ID, SPI_PIN_DATA_IN|SPI_PIN_DATA_OUT);
PLIB_SPI_CommunicationWidthSelect(MY_SPI_ID, SPI_COMMUNICATION_WIDTH_16BITS);
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_ID,SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
PLIB_SPI_ClockPolaritySelect(MY_SPI_ID, SPI_CLOCK_POLARITY_IDLE_HIGH);
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_ID, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);
PLIB_SPI_MasterEnable(MY_SPI_ID);
PLIB_SPI_AudioProtocolModeSelect(MY_SPI_ID,SPI_AUDIO_PROTOCOL_RIGHT_JUSTIFIED );
PLIB_SPI_FramedCommunicationDisable(MY_SPI_ID);
PLIB_SPI_AudioProtocolEnable(MY_SPI_ID);
// Optional: Enable interrupts.
// Enable the module
PLIB_SPI_Enable(MY_SPI_ID);
Transmission and Receive
Both data to be transmitted and data that is received are respectively written into, or read from, the SPI buffer.
Example: Audio Mode Communication Transfer
#define MY_SPI_ID SPI_ID_1
uint16_t data;
data = 0x00ac;
// write to buffer for TX
PLIB_SPI_BufferWrite (MY_SPI_ID,data);
// wait for transfer to complete
while(!PLIB_SPI_ReceiverBufferIsFull(MY_SPI_ID));
// Read the received value
data = PLIB_SPI_BufferRead (MY_SPI_ID);
Notes:
1. Refer to the "Interrupts" section in the related family reference manual or device data sheet for details on how to clear and
enable the SPI module interrupts and flags.
2. MY_SPI_ID is the SPI instance selected for use by the application developer.
3. Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
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5.6.22.4.3.5.2 Slave Mode
A few characteristics of Slave mode are:
• This mode enables the device to receive SCK and LRCK pulses as long as slave mode is enabled
• The SPI module drives zeros out of SDO, but does not shift data out or in (SDI) until the module receives the LRCK (i.e., the
edge that precedes the left channel)
• Once the module receives the leading edge of LRCK, it starts receiving data if PLIB_SPI_PinEnable (enables data in) is
selected and the serial data shifts out continuously even when the TX FIFO is empty
The following figure shows the interface between a SPI module in Audio Slave Interface mode to a codec master device.
Setup
The SPI module can be configured in Audio Protocol Slave mode by setting PLIB_SPI_SlaveEnable and enabling the audio
protocol through PLIB_SPI_AudioProtocolEnable.
Example: Slave Mode communication Setup
#define MY_SPI_ID SPI_ID_1
//Diable SPI
PLIB_SPI_Disable(MY_SPI_ID);
// Optional: Clear SPI interrupts and status flag.
//clear SPI buffer
PLIB_SPI_BufferClear(MY_SPI_ID);
// Configure General SPI Options
// Configure General SPI Options
PLIB_SPI_StopInIdleDisable(MY_SPI_ID);
PLIB_SPI_PinEnable(MY_SPI_ID,SPI_PIN_DATA_OUT|SPI_PIN_SLAVE_SELECT);
PLIB_SPI_CommunicationWidthSelect(MY_SPI_ID, SPI_COMMUNICATION_WIDTH_16BITS);
// SMP must be cleared when SPI is used in Slave mode
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_ID,SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
PLIB_SPI_ClockPolaritySelect(MY_SPI_ID, SPI_CLOCK_POLARITY_IDLE_HIGH);//clock polarity and
edge is subject to change ...
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_ID, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);//
... based on your communication mode.
PLIB_SPI_SlaveEnable(MY_SPI_ID);
PLIB_SPI_AudioProtocolModeSelect(MY_SPI_ID,SPI_AUDIO_PROTOCOL_RIGHT_JUSTIFIED );
PLIB_SPI_FramedCommunicationDisable(MY_SPI_ID);
PLIB_SPI_AudioProtocolEnable(MY_SPI_ID);
// Optional: Enable interrupts.
// Enable the module
PLIB_SPI_Enable(MY_SPI_ID);
Transmission and Receive
Both data to be transmitted and data that is received are respectively written into, or read from, the SPI buffer
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(PLIB_SPI_BufferWrite/ PLIB_SPI_BufferRead).
Example: Slave Mode communication Receive
#define MY_SPI_ID SPI_ID_1
uint16_t data;
if(PLIB_SPI_ReceiverHasOverflowed(MY_SPI_ID))
{
// error
PLIB_SPI_ReceiverOverflowClear(MY_SPI_ID);// clear overflow
data = PLIB_SPI_BufferRead (MY_SPI_ID);
}
else if (!PLIB_SPI_ReceiverBufferIsFull(MY_SPI_ID))
{
// error
}
else
{
data = PLIB_SPI_BufferRead (MY_SPI_ID); // read data
while(PLIB_SPI_TransmitBufferIsFull(MY_SPI_ID));
PLIB_SPI_BufferWrite(MY_SPI_ID, data); // send back
}
Notes:
1. Refer to the "Interrupts" section in the related family reference manual or device data sheet for details on how to clear and
enable the SPI module interrupts and flags.
2. MY_SPI_ID is the SPI instance selected for use by the application developer.
3. Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.6 Other Features
This topic describes the additional features available in the SPI Peripheral Library.
5.6.22.4.3.6.1 Communication Mode
The SPI module allows three types of data widths when transmitting and receiving data over a SPI bus. The selection of data
width determines the minimum length of the SPI data.The user application should select the appropriate data width to maximize
its data throughput. To change the mode of operation on the fly, the SPI module must be idle. If the SPI module is switched off,
the new mode will be available when the module is switched on again.
The macro, PLIB_SPI_CommunicationWidthSet, allows the module to communicate in either 8-/16-/32-bit modes. The
functionality will be the same for each mode, except for the number of bits that are received and transmitted.
Note: Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.6.2 Power-Saving Modes
Note: Each of the following modes can additionally support some or all of the features listed below. Please refer to the
"Power-Saving Features" chapter in the specific data sheet or the "Power-Saving Modes" family reference manual section for
more information.
Sleep Mode
When the device enters Sleep mode, the device clock source and the entire device is shut down. The consequences of entering
Sleep depend upon which mode (Master or Slave) the module is configured in at the time that Sleep mode is invoked.
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Idle Mode
When the device enters Idle mode, the device clock is operational, but the CPU and selected peripherals are shut down.
The SPI module can continue to operate in Idle mode by calling PLIB_SPI_StopInIdleDisable, or can stop operation in Idle mode
by calling PLIB_SPI_StopInIdleEnable.
Note: Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.6.3 SPI Receive-only Operation
Calling PLIB_SPI_PinDisable (data in pin) disables the transmission at the SDO pin. This allows the SPI module to be configured
for a receive-only mode of operation. This function is applicable to all SPI operating modes.
Note: Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.6.4 SPI Error Handling
If a new data word has been shifted and the previous buffer contents have not been read, the status can be read by calling
PLIB_SPI_ReceiverHasOverflowed. Any received data is not transferred, and further data reception is disabled until the buffer is
cleared by calling PLIB_SPI_ReceiverOverflowClear.
Note: Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.6.5 SPI Master Mode Clock Frequency
In the SPI Master mode, the clock provided to the SPI module is the system cycle (TCY). This clock will then be prescaled by the
primary prescaler (PLIB_SPI_PresclaeSelectPrimary), and the secondary prescaler (PLIB_SPI_PrescaleSelectSecondary). The
prescaled instruction clock becomes the serial clock and is provided to external devices via the SCKx pin.
Note: Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.3.6.6 Interrupts
The SPI module has the ability to generate interrupts reflecting the events that occur during the data communication. Interrupts
can be enabled or disabled using PLIB_SPI_ErrorInterruptEnable/PLIB_SPI_ErrorInterruptDisable.
The following types of interrupts can be generated:
• Receive data available interrupts are signalled by SPI receive and transmit flag. This event occurs when there is new data
assembled in the SPI receive buffer.
• Transmit buffer empty interrupts are signalled by SPI receive and transmit flag. This event occurs when there is space
available in the SPI transmit buffer and new data can be written.
• Error interrupts are signalled by SPI receive and transmit flag. This event occurs when there is an overflow condition for the
receive buffer when there is an underrun of the transmit buffer, or when a frame error event occurs.
Note: Not all features are available on all devices. Refer to the "Serial Peripheral Interface (SPI)" chapter in the specific device
data sheet for availability.
5.6.22.4.4 Configuring the Library
The library is configured for the supported SPI modules when the processor is chosen in the MPLAB IDE.
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5.6.22.5 Library Interface
Data Types and Constants
Name Description
SPI_AUDIO_COMMUNICATION_WIDTH Defines the list of SPI audio communication width.
SPI_AUDIO_ERROR Defines the list of SPI audio error.
SPI_AUDIO_PROTOCOL Data type defining the audio protocol mode.
SPI_AUDIO_TRANSMIT_MODE Defines the list of SPI transmit audio mode format.
SPI_BAUD_RATE_CLOCK Defines the list of SPI Baud Rate Generator (BRG).
SPI_CLOCK_POLARITY Defines the list of SPI clock polarity.
SPI_COMMUNICATION_WIDTH Defines the list of SPI communication width.
SPI_DATA_TYPE Data type defining the SPI data size.
SPI_ERROR_INTERRUPT Defines the list of SPI error interrupts.
SPI_FIFO_INTERRUPT Defines the list of SPI Buffer Interrupt mode.
SPI_FIFO_TYPE Defines the list of SPI buffer mode.
SPI_FRAME_PULSE_DIRECTION Defines the list of SPI frame sync pulse direction.
SPI_FRAME_PULSE_EDGE Defines the list of SPI frame sync pulse edge.
SPI_FRAME_PULSE_POLARITY Defines the list of SPI frame sync pulse polarity.
SPI_FRAME_PULSE_WIDTH Defines the list of SPI frame sync pulse width.
SPI_FRAME_SYNC_PULSE Data type defining the frame sync pulse counter values.
SPI_INPUT_SAMPLING_PHASE Defines the list of SPI data input sample phase.
SPI_MODULE_ID Identifies the supported SPI modules.
SPI_OUTPUT_DATA_PHASE Defines the list of SPI serial output data changes.
SPI_PIN Data type defining the SPI pin.
SPI_PRESCALE_PRIMARY Defines the list of possible primary prescaler values.
SPI_PRESCALE_SECONDARY Defines the list of possible seconday prescaler Vvlues.
Audio Mode Functions
Name Description
PLIB_SPI_AudioCommunicationWidthSelect Selects the data width for the SPI audio communication.
PLIB_SPI_AudioErrorDisable Disables the SPI error.
PLIB_SPI_AudioErrorEnable Enables the SPI error.
PLIB_SPI_AudioProtocolDisable Audio protocol is disabled.
PLIB_SPI_AudioProtocolEnable Audio protocol is enabled.
PLIB_SPI_AudioProtocolModeSelect Selects the Audio Protocol mode.
PLIB_SPI_AudioTransmitModeSelect Selects the transmit audio data format.
Data Transfer Functions
Name Description
PLIB_SPI_BufferClear Clears the SPI buffer.
PLIB_SPI_BufferRead Returns the SPI buffer value.
PLIB_SPI_BufferWrite Write the data to the SPI buffer.
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Feature Existence Functions
Name Description
PLIB_SPI_ExistsAudioCommunicationWidth Identifies whether the AudioCommunicationWidth feature exists
on the SPI module.
PLIB_SPI_ExistsAudioErrorControl Identifies whether the AudioErrorControl feature exists on the SPI
module.
PLIB_SPI_ExistsAudioProtocolControl Identifies whether the AudioProtocolControl feature exists on the
SPI module.
PLIB_SPI_ExistsAudioProtocolMode Identifies whether the AudioProtocolMode feature exists on the
SPI module.
PLIB_SPI_ExistsAudioTransmitMode Identifies whether the AudioTransmitMode feature exists on the
SPI module.
PLIB_SPI_ExistsBaudRate Identifies whether the BaudRate feature exists on the SPI module.
PLIB_SPI_ExistsBaudRateClock Identifies whether the BaudRateClock feature exists on the SPI
module.
PLIB_SPI_ExistsBuffer Identifies whether the Buffer feature exists on the SPI module.
PLIB_SPI_ExistsBusStatus Identifies whether the BusStatus feature exists on the SPI module.
PLIB_SPI_ExistsClockPolarity Identifies whether the ClockPolarity feature exists on the SPI
module.
PLIB_SPI_ExistsCommunicationWidth Identifies whether the CommunicationWidth feature exists on the
SPI module.
PLIB_SPI_ExistsEnableControl Identifies whether the EnableControl feature exists on the SPI
module.
PLIB_SPI_ExistsErrorInterruptControl Identifies whether the ErrorInterruptControl feature exists on the
SPI module.
PLIB_SPI_ExistsFIFOControl Identifies whether the FIFOControl feature exists on the SPI
module.
PLIB_SPI_ExistsFIFOCount Identifies whether the FIFOCount feature exists on the SPI
module.
PLIB_SPI_ExistsFIFOInterruptMode Identifies whether the FIFOInterruptMode feature exists on the
SPI module.
PLIB_SPI_ExistsFIFOShiftRegisterEmptyStatus Identifies whether the FIFOShiftRegisterEmptyStatus feature
exists on the SPI module.
PLIB_SPI_ExistsFramedCommunication Identifies whether the FramedCommunication feature exists on
the SPI module.
PLIB_SPI_ExistsFrameErrorStatus Identifies whether the FrameErrorStatus feature exists on the SPI
module.
PLIB_SPI_ExistsFrameSyncPulseCounter Identifies whether the FrameSyncPulseCounter feature exists on
the SPI module.
PLIB_SPI_ExistsFrameSyncPulseDirection Identifies whether the FrameSyncPulseDirection feature exists on
the SPI module.
PLIB_SPI_ExistsFrameSyncPulseEdge Identifies whether the FrameSyncPulseEdge feature exists on the
SPI module.
PLIB_SPI_ExistsFrameSyncPulsePolarity Identifies whether the FrameSyncPulsePolarity feature exists on
the SPI module.
PLIB_SPI_ExistsFrameSyncPulseWidth Identifies whether the FrameSyncPulseWidth feature exists on
the SPI module.
PLIB_SPI_ExistsInputSamplePhase Identifies whether the InputSamplePhase feature exists on the
SPI module.
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PLIB_SPI_ExistsMasterControl Identifies whether the MasterControl feature exists on the SPI
module.
PLIB_SPI_ExistsOutputDataPhase Identifies whether the OutputDataPhase feature exists on the SPI
module.
PLIB_SPI_ExistsPinControl Identifies whether the PinControl feature exists on the SPI module.
PLIB_SPI_ExistsPrimaryPrescale Identifies whether the PrimaryPrescale feature exists on the SPI
module.
PLIB_SPI_ExistsReadDataSignStatus Identifies whether the ReadDataSignStatus feature exists on the
SPI module.
PLIB_SPI_ExistsReceiveBufferStatus Identifies whether the ReceiveBufferStatus feature exists on the
SPI module.
PLIB_SPI_ExistsReceiveFIFOStatus Identifies whether the ReceiveFIFOStatus feature exists on the
SPI module.
PLIB_SPI_ExistsReceiverOverflow Identifies whether the ReceiverOverflow feature exists on the SPI
module.
PLIB_SPI_ExistsSecondaryPrescale Identifies whether the SecondaryPrescale feature exists on the
SPI module.
PLIB_SPI_ExistsSlaveSelectControl Identifies whether the SlaveSelectControl feature exists on the
SPI module.
PLIB_SPI_ExistsStopInIdleControl Identifies whether the StopInIdle feature exists on the SPI module.
PLIB_SPI_ExistsTransmitBufferEmptyStatus Identifies whether the TransmitBufferEmptyStatus feature exists
on the SPI module.
PLIB_SPI_ExistsTransmitBufferFullStatus Identifies whether the TransmitBufferFullStatus feature exists on
the SPI module.
PLIB_SPI_ExistsTransmitUnderRunStatus Identifies whether the TransmitUnderRunStatus feature exists on
the SPI module.
Framed Mode Functions
Name Description
PLIB_SPI_FramedCommunicationDisable Disables framed SPI support.
PLIB_SPI_FramedCommunicationEnable Enables framed SPI support.
PLIB_SPI_FrameErrorStatusGet Returns the current status of the SPI frame error.
PLIB_SPI_FrameSyncPulseCounterSelect Selects at which character the SPI frame sync pulse is generated.
PLIB_SPI_FrameSyncPulseDirectionSelect Selects the frame sync pulse direction.
PLIB_SPI_FrameSyncPulseEdgeSelect Selects the frame sync pulse edge.
PLIB_SPI_FrameSyncPulsePolaritySelect Selects the frame sync pulse polarity.
PLIB_SPI_FrameSyncPulseWidthSelect Sets the frame sync pulse width.
General Configuration and Status Functions
Name Description
PLIB_SPI_BaudRateClockSelect Selects the type of clock is used by the Baud Rate Generator.
PLIB_SPI_BaudRateSet Sets the baud rate to the desired value.
PLIB_SPI_ClockPolaritySelect Enables clock polarity.
PLIB_SPI_CommunicationWidthSelect Selects the data width for the SPI communication.
PLIB_SPI_Disable Disables the SPI module.
PLIB_SPI_Enable Enables the SPI module.
PLIB_SPI_ErrorInterruptDisable Enables SPI error interrupts.
PLIB_SPI_ErrorInterruptEnable Enables SPI error interrupts
PLIB_SPI_FIFOCountGet Reads the SPI Buffer Element Count bits for either receive or transmit.
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PLIB_SPI_FIFODisable Disables the SPI enhanced buffer.
PLIB_SPI_FIFOEnable Enables the SPI enhanced buffer.
PLIB_SPI_FIFOInterruptModeSelect Selects the SPI buffer interrupt mode.
PLIB_SPI_FIFOShiftRegisterIsEmpty Returns the current status of the SPI shift register.
PLIB_SPI_InputSamplePhaseSelect Selects the SPI data input sample phase.
PLIB_SPI_IsBusy Returns the current SPI module activity status.
PLIB_SPI_MasterEnable Enables the SPI in Master mode.
PLIB_SPI_OutputDataPhaseSelect Selects serial output data change.
PLIB_SPI_PinDisable Enables the selected SPI pins.
PLIB_SPI_PinEnable Enables the selected SPI pins.
PLIB_SPI_PrescalePrimarySelect Selects the primary prescale for SPI Master mode.
PLIB_SPI_PrescaleSecondarySelect Selects the seconday prescale for SPI Master mode.
PLIB_SPI_ReadDataIsSignExtended Returns the current status of the receive (RX) FIFO sign-extended data.
PLIB_SPI_SlaveEnable Enables the SPI in Slave mode.
PLIB_SPI_SlaveSelectDisable Disables Master mode slave select.
PLIB_SPI_SlaveSelectEnable Enables Master mode slave select.
PLIB_SPI_StopInIdleDisable Continues module operation when the device enters Idle mode.
PLIB_SPI_StopInIdleEnable Discontinues module operation when the device enters Idle mode.
Receiver Functions
Name Description
PLIB_SPI_ReceiverBufferIsFull Returns the current status of the SPI receive buffer.
PLIB_SPI_ReceiverFIFOIsEmpty Returns the current status of the SPI receive FIFO.
PLIB_SPI_ReceiverHasOverflowed Returns the current status of the SPI receiver overflow.
PLIB_SPI_ReceiverOverflowClear Clears the SPI receive overflow flag.
Transmitter Functions
Name Description
PLIB_SPI_TransmitBufferIsEmpty Returns the current status of the transmit buffer.
PLIB_SPI_TransmitBufferIsFull Returns the current transmit buffer status of the SPI module.
PLIB_SPI_TransmitUnderRunStatusGet Returns the current status of the transmit underrun.
Description
This section lists and describes the functions, data types, and constants provided in the SPI Peripheral Library.
5.6.22.5.1 General Configuration and Status Functions
5.6.22.5.1.1 PLIB_SPI_BaudRateClockSelect Function
C
void PLIB_SPI_BaudRateClockSelect(
SPI_MODULE_ID index,
SPI_BAUD_RATE_CLOCK type
);
Description
This function selects the type of clock is used by the Baud Rate Generator.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
type One of the SPI_BAUD_RATE_CLOCK enumeration values as the SPI baud clock
Returns
None.
Remarks
This function implements an operation of the baud rate clock control feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsBaudRateClock" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_BaudRateClockSelect (MY_SPI_INSTANCE, SPI_BAUD_RATE_MCLK_CLOCK);
5.6.22.5.1.2 PLIB_SPI_BaudRateSet Function
C
void PLIB_SPI_BaudRateSet(
SPI_MODULE_ID index,
uint32_t clockFrequency,
uint32_t baudRate
);
Description
This function sets the baud rate to the desired value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
clockFrequency Clock frequency
baudrate Baud rate value
Returns
None.
Remarks
Setting a new baud rate value causes the baud rate timer to reset. This ensures that the baud rate timer does not have to
overflow before outputting the new baud rate.
If the system clock is changed during an active receive operation, a receive error or data loss may result. To avoid this issue,
verify that no receptions are in progress before changing the system clock.
This function implements an operation of the baud rate set feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsBaudRate" in your application to automatically
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determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_BaudRateSet(MY_SPI_INSTANCE, MY_CLOCK_FREQUENCY, 9600);
5.6.22.5.1.3 PLIB_SPI_ClockPolaritySelect Function
C
void PLIB_SPI_ClockPolaritySelect(
SPI_MODULE_ID index,
SPI_CLOCK_POLARITY polarity
);
Description
This function enables clock polarity.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
polarity One of the SPI_CLOCK_POLARITY enumeration values as the SPI clock polarity
Returns
None.
Remarks
This function implements an operation of the clock polarity feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsClockPolarity" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_ClockPolaritySelect(MY_SPI_INSTANCE, SPI_CLOCK_POLARITY_IDLE_HIGH );
5.6.22.5.1.4 PLIB_SPI_CommunicationWidthSelect Function
C
void PLIB_SPI_CommunicationWidthSelect(
SPI_MODULE_ID index,
SPI_COMMUNICATION_WIDTH width
);
Description
This function selects the data width for the SPI communication.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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width One of the SPI_COMMUNICATION_WIDTH enumeration values as the SPI buffer
width
Returns
None.
Remarks
This function implements an operation of the communication width feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsCommunicationWidth" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_CommunicationWidthSelect(MY_SPI_INSTANCE, SPI_COMMUNICATION_WIDTH_8BITS);
5.6.22.5.1.5 PLIB_SPI_Disable Function
C
void PLIB_SPI_Disable(
SPI_MODULE_ID index
);
Description
This function disables the SPI module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the enable control feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsEnableControl" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_Disable(MY_SPI_INSTANCE);
5.6.22.5.1.6 PLIB_SPI_Enable Function
C
void PLIB_SPI_Enable(
SPI_MODULE_ID index
);
Description
This function enables the SPI module.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
The SCKx, SDOx, SDIx and SSx pins must be assigned to available RPn pins before use.
This function implements an operation of the enable control feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsEnableControl" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_Enable(MY_SPI_INSTANCE);
5.6.22.5.1.7 PLIB_SPI_ErrorInterruptDisable Function
C
void PLIB_SPI_ErrorInterruptDisable(
SPI_MODULE_ID index,
SPI_ERROR_INTERRUPT error
);
Description
This function enables SPI error interrupts.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
error One of the SPI_ERROR_INTERRUPT enumeration values as the SPI interrupt
error
Returns
None.
Remarks
This function implements an operation of the error interrupt control feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsErrorInterruptControl" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_ErrorInterruptDisable (MY_SPI_INSTANCE, SPI_ERROR_INTERRUPT_FRAME_ERROR_OVERFLOW);
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5.6.22.5.1.8 PLIB_SPI_ErrorInterruptEnable Function
C
void PLIB_SPI_ErrorInterruptEnable(
SPI_MODULE_ID index,
SPI_ERROR_INTERRUPT error
);
Description
This function enables SPI error interrupts.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
type One of the SPI_ERROR_INTERRUPT enumeration values as the SPI interrupt
error
Returns
None.
Remarks
This function implements an operation of the error interrupt control feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsErrorInterruptControl" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_ErrorInterruptEnable (MY_SPI_INSTANCE, SPI_ERROR_INTERRUPT_FRAME_ERROR_OVERFLOW);
5.6.22.5.1.9 PLIB_SPI_FIFOCountGet Function
C
uint8_t PLIB_SPI_FIFOCountGet(
SPI_MODULE_ID index,
SPI_FIFO_TYPE type
);
Description
This function reads the number of SPI transfers pending for Master mode and the number of unread SPI transfers for Slave
mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
type One of the SPI_FIFO_TYPE enumeration values
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Returns
CountValue - Buffer element count bits
Remarks
Valid in Enhanced Buffer mode.
This function implements an operation of the FIFO control feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFIFOCount" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
uint8_t count = PLIB_SPI_FIFOCountGet(MY_SPI_INSTANCE,SPI_FIFO_TYPE_TRANSMIT);
5.6.22.5.1.10 PLIB_SPI_FIFODisable Function
C
void PLIB_SPI_FIFODisable(
SPI_MODULE_ID index
);
Description
This function disables the SPI enhanced buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Enables the legacy standard single buffer mode.
This function implements an operation of the FIFO control feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFIFOControl" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_FIFODisable(MY_SPI_INSTANCE);
5.6.22.5.1.11 PLIB_SPI_FIFOEnable Function
C
void PLIB_SPI_FIFOEnable(
SPI_MODULE_ID index
);
Description
This function enables the SPI enhanced buffer.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This enables the enhanced buffer mode.
This function implements an operation of the FIFO control feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFIFOControl" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_FIFOEnable(MY_SPI_INSTANCE);
5.6.22.5.1.12 PLIB_SPI_FIFOInterruptModeSelect Function
C
void PLIB_SPI_FIFOInterruptModeSelect(
SPI_MODULE_ID index,
SPI_FIFO_INTERRUPT mode
);
Description
This function selects the SPI buffer interrupt mode from SPI_FIFO_INTERRUPT.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode One of the SPI_FIFO_INTERRUPT enumeration values as the SPI buffer interrupt
mode
Returns
None.
Remarks
Valid in Enhanced Buffer mode.
This function implements an operation of the FIFO interrupt feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFIFOInterruptMode" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
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PLIB_SPI_FIFOInterruptModeSelect(MY_SPI_INSTANCE,
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_BUFFER_IS_NOT_FULL);
5.6.22.5.1.13 PLIB_SPI_FIFOShiftRegisterIsEmpty Function
C
bool PLIB_SPI_FIFOShiftRegisterIsEmpty(
SPI_MODULE_ID index
);
Description
This function returns the current status of the SPI shift register.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - SPI shift register is empty and ready to send or receive
• false - SPI shift register is not enpty
Remarks
Valid in Enhanced Buffer mode.
This function implements an operation of the FIFO status feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFIFOShiftRegisterEmptyStatus" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
bool Status = PLIB_SPI_FIFOShiftRegisterIsEmpty(MY_SPI_INSTANCE);
5.6.22.5.1.14 PLIB_SPI_InputSamplePhaseSelect Function
C
void PLIB_SPI_InputSamplePhaseSelect(
SPI_MODULE_ID index,
SPI_INPUT_SAMPLING_PHASE phase
);
Description
This function selects the input sampling phase in Master mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
phase One of the SPI_INPUT_SAMPLING_PHASE as the SPI input sampling phase
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Returns
None.
Remarks
This function implements an operation of the input sample phase feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsInputSamplePhase" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_InputSamplePhaseSelect(MY_SPI_INSTANCE, SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE);
5.6.22.5.1.15 PLIB_SPI_IsBusy Function
C
bool PLIB_SPI_IsBusy(
SPI_MODULE_ID index
);
Description
This function returns the current SPI module activity status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - SPI module is currently busy with some transactions
• false - SPI module is currently idle
Remarks
This function implements an operation of the bus status feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use "PLIB_SPI_ExistsBusStatus" in your application to automatically
determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
bool status = PLIB_SPI_IsBusy(MY_SPI_INSTANCE);
5.6.22.5.1.16 PLIB_SPI_MasterEnable Function
C
void PLIB_SPI_MasterEnable(
SPI_MODULE_ID index
);
Description
This function enables the SPI in Master mode.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the master enable control feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsMasterControl" in your application
to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_MasterEnable(MY_SPI_INSTANCE);
5.6.22.5.1.17 PLIB_SPI_OutputDataPhaseSelect Function
C
void PLIB_SPI_OutputDataPhaseSelect(
SPI_MODULE_ID index,
SPI_OUTPUT_DATA_PHASE phase
);
Description
This function selects serial output data change.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
data One of the SPI_OUTPUT_DATA_PHASE enumeration values as the SPI serial
output data change
Returns
None.
Remarks
This function implements an operation of the output data phase feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsOutputDataPhase" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_OutputDataPhaseSelect(MY_SPI_INSTANCE, SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK);
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5.6.22.5.1.18 PLIB_SPI_PinDisable Function
C
void PLIB_SPI_PinDisable(
SPI_MODULE_ID index,
SPI_PIN pin
);
Description
This function enables the selected SPI pins.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pin One of the SPI_PIN enumeration values as the SPI pin
Returns
None.
Remarks
This function implements an operation of the pin control feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use "PLIB_SPI_ExistsPinControl" in your application to automatically
determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_PinDisable(MY_SPI_INSTANCE, SPI_PIN_SLAVE_SELECT);
5.6.22.5.1.19 PLIB_SPI_PinEnable Function
C
void PLIB_SPI_PinEnable(
SPI_MODULE_ID index,
SPI_PIN pin
);
Description
This function enables the selected SPI pins.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pin One of the SPI_PIN enumeration values as the SPI pin
Returns
None.
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Remarks
This function implements an operation of the pin control feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use "PLIB_SPI_ExistsPinControl" in your application to automatically
determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_PinEnable(MY_SPI_INSTANCE, SPI_PIN_SLAVE_SELECT);
5.6.22.5.1.20 PLIB_SPI_PrescalePrimarySelect Function
C
void PLIB_SPI_PrescalePrimarySelect(
SPI_MODULE_ID index,
SPI_PRESCALE_PRIMARY prescale
);
Description
This function selects the primary prescale for SPI Master mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
prescale One of the SPI_PRIMARY_PRESCALE enumeration values as the SPI master
primary prescale
Returns
None.
Remarks
This function implements an operation of the primary prescale select feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsPrimaryPrescale" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_PrescalePrimarySelect(MY_SPI_INSTANCE,
SPI_PRIMARY_PRESCALE_4);
5.6.22.5.1.21 PLIB_SPI_PrescaleSecondarySelect Function
C
void PLIB_SPI_PrescaleSecondarySelect(
SPI_MODULE_ID index,
SPI_PRESCALE_SECONDARY prescale
);
Description
This function selects the seconday prescale for SPI Master mode.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
prescale One of the SPI_SECONDARY_PRESCALE enumeration values as the SPI
master secondary prescale
Returns
None.
Remarks
This function implements an operation of the secondary prescale select feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsSecondaryPrescale" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_PrescaleSecondarySelect( MY_SPI_INSTANCE,
SPI_SECONDARY_PRESCALE_3);
5.6.22.5.1.22 PLIB_SPI_ReadDataIsSignExtended Function
C
bool PLIB_SPI_ReadDataIsSignExtended(
SPI_MODULE_ID index
);
Description
This function returns the current status of the receive (RX) FIFO sign-extended data.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Data from RX FIFO is sign-extended.
• false - Data from RX FIFO is not sign-extended
Remarks
This function implements an operation of the data sign feature. This feature may not be available on all devices. Please refer to
the specific device data sheet to determine availability or use "PLIB_SPI_ExistsReadDataSignStatus" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
bool Status = PLIB_SPI_ReadDataIsSignExtended(MY_SPI_INSTANCE);
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5.6.22.5.1.23 PLIB_SPI_SlaveEnable Function
C
void PLIB_SPI_SlaveEnable(
SPI_MODULE_ID index
);
Description
This function enables the SPI in Slave mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the master enable control feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsMasterControl" in your application
to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_SlaveEnable(MY_SPI_INSTANCE);
5.6.22.5.1.24 PLIB_SPI_SlaveSelectDisable Function
C
void PLIB_SPI_SlaveSelectDisable(
SPI_MODULE_ID index
);
Description
This function disables Master mode slave select.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature does not support Framed SPI mode.
This function implements an operation of the slave select feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsSlaveSelectControl" in your application to
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automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_SlaveSelectDisable(MY_SPI_INSTANCE);
5.6.22.5.1.25 PLIB_SPI_SlaveSelectEnable Function
C
void PLIB_SPI_SlaveSelectEnable(
SPI_MODULE_ID index
);
Description
This function enables Master mode slave select.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature does not support Framed SPI mode.
This function implements an operation of the slave select feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsSlaveSelectControl" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_SlaveSelectEnable(MY_SPI_INSTANCE);
5.6.22.5.1.26 PLIB_SPI_StopInIdleDisable Function
C
void PLIB_SPI_StopInIdleDisable(
SPI_MODULE_ID index
);
Description
This function sets up the SPI module such that module operation is continued when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
None.
Remarks
This function implements an operation of the stop in idle control feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsStopInIdleControl" in your application to
determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_StopInIdleDisable(MY_SPI_INSTANCE);
5.6.22.5.1.27 PLIB_SPI_StopInIdleEnable Function
C
void PLIB_SPI_StopInIdleEnable(
SPI_MODULE_ID index
);
Description
This function sets up the SPI module such that module operation is disabled when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the stop in idle control feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsStopInIdleControl" in your application to
automatically determine if this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_StopInIdleEnable(MY_SPI_INSTANCE);
5.6.22.5.2 Data Transfer Functions
5.6.22.5.2.1 PLIB_SPI_BufferClear Function
C
void PLIB_SPI_BufferClear(
SPI_MODULE_ID index
);
Description
This function clears the SPI buffer.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the buffer control feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsBuffer" in your application to automatically
determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_BufferClear(MY_SPI_INSTANCE);
5.6.22.5.2.2 PLIB_SPI_BufferRead Function
C
SPI_DATA_TYPE PLIB_SPI_BufferRead(
SPI_MODULE_ID index
);
Description
This function returns the SPI buffer value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Returns the SPI_DATA_TYPE enumeration value.
Remarks
This function implements an operation of the buffer control feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsBuffer" in your application to automatically
determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
uint8_t bufferValue = PLIB_SPI_BufferRead(MY_SPI_INSTANCE);
5.6.22.5.2.3 PLIB_SPI_BufferWrite Function
C
void PLIB_SPI_BufferWrite(
SPI_MODULE_ID index,
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SPI_DATA_TYPE data
);
Description
This function writes data to the SPI buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
data Data of the type SPI_DATA_TYPE to written to the SPI buffer
Returns
None.
Remarks
This function implements an operation of the buffer control feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsBuffer" in your application to automatically
determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_BufferWrite (MY_SPI_INSTANCE, 0xFF);
5.6.22.5.3 Framed Mode Functions
5.6.22.5.3.1 PLIB_SPI_FramedCommunicationDisable Function
C
void PLIB_SPI_FramedCommunicationDisable(
SPI_MODULE_ID index
);
Description
This function disables framed SPI support.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the framed communication feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFramedCommunication" in your
application to automatically determine whether this feature is available.
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Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_FramedCommunicationDisable(MY_SPI_INSTANCE);
5.6.22.5.3.2 PLIB_SPI_FramedCommunicationEnable Function
C
void PLIB_SPI_FramedCommunicationEnable(
SPI_MODULE_ID index
);
Description
This function enables framed SPI support.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the framed communication feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFramedCommunication" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_FramedCommunicationEnable(MY_SPI_INSTANCE);
5.6.22.5.3.3 PLIB_SPI_FrameErrorStatusGet Function
C
bool PLIB_SPI_FrameErrorStatusGet(
SPI_MODULE_ID index
);
Description
This function returns the current status of the SPI frame error.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Frame error detected
• false - No frame error detected
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Remarks
Valid only if Frame mode is enabled.
This function implements an operation of the framed communication feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFrameErrorStatus" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
bool status = PLIB_SPI_FrameErrorStatusGet(MY_SPI_INSTANCE);
5.6.22.5.3.4 PLIB_SPI_FrameSyncPulseCounterSelect Function
C
void PLIB_SPI_FrameSyncPulseCounterSelect(
SPI_MODULE_ID index,
SPI_FRAME_SYNC_PULSE pulse
);
Description
This function selects at which character the SPI frame sync pulse is generated.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pulse One of the SPI_FRAME_SYNC_PULSE enumeration values as the SPI frame
sync pulse count
Returns
None.
Remarks
This is valid only when PLIB_SPI_FramedCommunicationEnable is enabled.
This function implements an operation of the framed communication feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFrameSyncPulseCounter" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_FrameSyncPulseCounterSelect(MY_SPI_INSTANCE,
SPI_FRAME_SYNC_PULSE_ON_EVERY_32_DATA_CHARACTER );
5.6.22.5.3.5 PLIB_SPI_FrameSyncPulseDirectionSelect Function
C
void PLIB_SPI_FrameSyncPulseDirectionSelect(
SPI_MODULE_ID index,
SPI_FRAME_PULSE_DIRECTION direction
);
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Description
This function selects the frame sync pulse direction.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
direction One of the SPI_FRAME_PULSE_DIRECTION enumeration values as the SPI
frame sync pulse polarity
Returns
None.
Remarks
This function implements an operation of the framed communication feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFrameSyncPulseDirection" in
your application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_FrameSyncPulseDirectionSelect(MY_SPI_INSTANCE, SPI_FRAME_PULSE_DIRECTION_INPUT );
5.6.22.5.3.6 PLIB_SPI_FrameSyncPulseEdgeSelect Function
C
void PLIB_SPI_FrameSyncPulseEdgeSelect(
SPI_MODULE_ID index,
SPI_FRAME_PULSE_EDGE edge
);
Description
This function selects the frame sync pulse edge.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
edge One of the SPI_FRAME_PULSE_EDGE enumeration values as the SPI frame
sync pulse edge
Returns
None.
Remarks
This function implements an operation of the framed communication feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFrameSyncPulseEdge" in your
application to automatically determine whether this feature is available.
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Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_FrameSyncPulseEdgeSelect(MY_SPI_INSTANCE,
SPI_FRAME_PULSE_EDGE_COINCIDES_FIRST_BIT_CLOCK);
5.6.22.5.3.7 PLIB_SPI_FrameSyncPulsePolaritySelect Function
C
void PLIB_SPI_FrameSyncPulsePolaritySelect(
SPI_MODULE_ID index,
SPI_FRAME_PULSE_POLARITY polarity
);
Description
This function selects the frame sync pulse polarity.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
polarity One of the SPI_FRAME_PULSE_POLARITY enumeration values as the SPI
frame sync pulse polarity
Returns
None.
Remarks
Available only for Frame mode.
This function implements an operation of the framed communication feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFrameSyncPulsePolarity" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_FrameSyncPulsePolaritySelect(MY_SPI_INSTANCE, SPI_FRAME_PULSE_POLARITY_ACTIVE_HIGH );
5.6.22.5.3.8 PLIB_SPI_FrameSyncPulseWidthSelect Function
C
void PLIB_SPI_FrameSyncPulseWidthSelect(
SPI_MODULE_ID index,
SPI_FRAME_PULSE_WIDTH width
);
Description
This function sets the frame sync pulse width.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
edge One of the SPI_FRAME_PULSE_WIDTH enumeration values as the SPI frame
sync pulse width.
Returns
None.
Remarks
Length of the word is dependent on the communication mode.
This function implements an operation of the framed communication feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsFrameSyncPulseWidth" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_FrameSyncPulseWidthSelect (MY_SPI_INSTANCE,SPI_FRAME_PULSE_WIDTH_ONE_WORD_LENGTH);
5.6.22.5.4 Audio Mode Functions
5.6.22.5.4.1 PLIB_SPI_AudioCommunicationWidthSelect Function
C
void PLIB_SPI_AudioCommunicationWidthSelect(
SPI_MODULE_ID index,
SPI_AUDIO_COMMUNICATION_WIDTH mode
);
Description
This function selects the data width for the SPI audio communication.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
width One of the SPI_AUDIO_COMMUNICATION_WIDTH enumeration values as the
SPI buffer width
Returns
None.
Remarks
This mode is available only when PLIB_SPI_AudioProtocolEnable is enabled.
This function implements an operation of the audio communication width feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
"PLIB_SPI_ExistsAudioCommunicationWidth" in your application to automatically determine whether this feature is available.
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Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_AudioCommunicationWidthSelect(MY_SPI_INSTANCE,
SPI_AUDIO_COMMUNICATION_32DATA_32FIFO_32CHANNEL);
5.6.22.5.4.2 PLIB_SPI_AudioErrorDisable Function
C
void PLIB_SPI_AudioErrorDisable(
SPI_MODULE_ID index,
SPI_AUDIO_ERROR error
);
Description
This function disables the SPI error.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
error One of the SPI_AUDIO_ERROR enumeration values as the SPI error
Returns
None.
Remarks
This function implements an operation of the audio error control feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsAudioErrorControl" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_AudioErrorDisable (MY_SPI_INSTANCE, SPI_AUDIO_ERROR_RECEIVE_OVERFLOW);
5.6.22.5.4.3 PLIB_SPI_AudioErrorEnable Function
C
void PLIB_SPI_AudioErrorEnable(
SPI_MODULE_ID index,
SPI_AUDIO_ERROR error
);
Description
This function enables the SPI error.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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error One of the SPI_AUDIO_ERROR enumeration values as the SPI error
Returns
None.
Remarks
This function implements an operation of the audio error control feature. This feature may not be available on all devices. Please
refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsAudioErrorControl" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_AudioErrorEnable (MY_SPI_INSTANCE, SPI_AUDIO_ERROR_RECEIVE_OVERFLOW);
5.6.22.5.4.4 PLIB_SPI_AudioProtocolDisable Function
C
void PLIB_SPI_AudioProtocolDisable(
SPI_MODULE_ID index
);
Description
This function disables the audio protocol.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the audio protocol control feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsAudioProtocolControl" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_AudioProtocolDisable(MY_SPI_INSTANCE);
5.6.22.5.4.5 PLIB_SPI_AudioProtocolEnable Function
C
void PLIB_SPI_AudioProtocolEnable(
SPI_MODULE_ID index
);
Description
This function enables the audio protocol.
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Preconditions
Disable the SPI module by calling PLIB_SPI_Disable.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the audio protocol control feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsAudioProtocolControl" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_AudioProtocolEnable(MY_SPI_INSTANCE);
5.6.22.5.4.6 PLIB_SPI_AudioProtocolModeSelect Function
C
void PLIB_SPI_AudioProtocolModeSelect(
SPI_MODULE_ID index,
SPI_AUDIO_PROTOCOL mode
);
Description
This function selects the Audio Protocol mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode One of the SPI_AUDIO_PROTOCOL enumeration values as the audio protocol
Returns
None.
Remarks
This function implements an operation of the audio protocol mode feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsAudioProtocolMode" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_AudioProtocolModeSelect(MY_SPI_INSTANCE,SPI_AUDIO_PROTOCOL_RIGHT_JUSTIFIED );
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5.6.22.5.4.7 PLIB_SPI_AudioTransmitModeSelect Function
C
void PLIB_SPI_AudioTransmitModeSelect(
SPI_MODULE_ID index,
SPI_AUDIO_TRANSMIT_MODE mode
);
Description
This function selects the transmit audio data format.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode One of the SPI_TRANSMIT_AUDIO_MODE enumeration values as the transmit
audio format
Returns
None.
Remarks
This function implements an operation of the audio transmit mode feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsAudioTransmitMode" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_AudioTransmitModeSelect (MY_SPI_INSTANCE, SPI_AUDIO_TRANSMIT_MONO);
5.6.22.5.5 Transmitter Functions
5.6.22.5.5.1 PLIB_SPI_TransmitBufferIsEmpty Function
C
bool PLIB_SPI_TransmitBufferIsEmpty(
SPI_MODULE_ID index
);
Description
This function returns the current status of the transmit buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
• true - Transmit buffer is empty
• false - Transmit buffer is not empty
Remarks
This function implements an operation of the transmit buffer empty status feature. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use
"PLIB_SPI_ExistsTransmitBufferEmptyStatus" in your application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
bool Status = PLIB_SPI_TransmitBufferIsEmpty(MY_SPI_INSTANCE);
5.6.22.5.5.2 PLIB_SPI_TransmitBufferIsFull Function
C
bool PLIB_SPI_TransmitBufferIsFull(
SPI_MODULE_ID index
);
Description
This function returns the current transmit buffer status of the SPI module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Transmit not yet started, transmit buffer is full
• false - Transmit started, transmit buffer is empty/not full
Remarks
In Standard Buffer mode - automatically set in hardware when SPI buffer writes occur, loading the transmit buffer. Automatically
cleared in hardware when the SPI module transfers data from the transmit buffer to the shift register.
In Enhanced Buffer mode - automatically set in hardware when SPI buffer writes occur, loading the last available buffer.
Automatically cleared in hardware when the buffer is available for writing.
This function implements an operation of the transmit buffer status feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsTransmitBufferFullStatus" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
bool buffullstate = PLIB_SPI_TransmitBufferIsFull (MY_SPI_INSTANCE);
5.6.22.5.5.3 PLIB_SPI_TransmitUnderRunStatusGet Function
C
bool PLIB_SPI_TransmitUnderRunStatusGet(
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SPI_MODULE_ID index
);
Description
This function returns the current status of the transmit underrun.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Transmit buffer has encountered an underrun condition
• false - Transmit buffer run has not encountered an underrun condition
Remarks
Valid in Framed Sync mode.
This function implements an operation of the transmit underrun status feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsTransmitUnderRunStatus" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
bool Status = PLIB_SPI_TransmitUnderRunStatusGet(MY_SPI_INSTANCE);
5.6.22.5.6 Receiver Functions
5.6.22.5.6.1 PLIB_SPI_ReceiverBufferIsFull Function
C
bool PLIB_SPI_ReceiverBufferIsFull(
SPI_MODULE_ID index
);
Description
This function returns the current status of the SPI receive buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Status - Receiver Buffer Full Status true - Receive complete, receive buffer is full false - Receive is not complete, receive buffer
is empty
Remarks
In Standard Buffer mode - automatically set in hardware when the SPI module transfers data from the shift register to the receive
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buffer. Automatically cleared in hardware when the core reads the SPI buffer, read in the receive buffer.
In Enhanced Buffer mode - automatically set in hardware when the SPI module transfers data from the shift register to the
receive buffer, filling the last unread buffer. Automatically cleared in hardware when a buffer is available for a transfer from the
shift register.
This function implements an operation of the receiver buffer status feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsReceiveBufferStatus" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
bool receivefullstate = PLIB_SPI_ReceiverBufferIsFull (MY_SPI_INSTANCE);
5.6.22.5.6.2 PLIB_SPI_ReceiverFIFOIsEmpty Function
C
bool PLIB_SPI_ReceiverFIFOIsEmpty(
SPI_MODULE_ID index
);
Description
This function returns the current status of the SPI receive FIFO.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Receive FIFO is empty
• false - Receive FIFO is not empty
Remarks
Valid in Enhanced Buffer mode.
This function implements an operation of the FIFO status feature. This feature may not be available on all devices. Please refer
to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsReceiveFIFOStatus" in your application to
automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
bool fifostate = PLIB_SPI_ReceiverFIFOIsEmpty (MY_SPI_INSTANCE);
5.6.22.5.6.3 PLIB_SPI_ReceiverHasOverflowed Function
C
bool PLIB_SPI_ReceiverHasOverflowed(
SPI_MODULE_ID index
);
Description
This function returns the current status of the SPI receiver overflow.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Status - SPI receiver overflow status true - A new byte/word is completely received and discarded. The user software has not
read the previous data in the SPI buffer register. false - No Overflow has occurred
Remarks
This function implements an operation of the receiver overflow status feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsReceiverOverflow" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
bool overflowstate = PLIB_SPI_ReceiverHasOverflowed(MY_SPI_INSTANCE);
5.6.22.5.6.4 PLIB_SPI_ReceiverOverflowClear Function
C
void PLIB_SPI_ReceiverOverflowClear(
SPI_MODULE_ID index
);
Description
This function clears the SPI receive overflow flag.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function implements an operation of the receiver overflow status feature. This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use "PLIB_SPI_ExistsReceiverOverflow" in your
application to automatically determine whether this feature is available.
Example
// Where MY_SPI_INSTANCE, is the SPI instance selected for use by the
// application developer.
PLIB_SPI_ReceiverOverflowClear(MY_SPI_INSTANCE);
5.6.22.5.7 Data Types and Constants
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5.6.22.5.7.1 SPI_AUDIO_COMMUNICATION_WIDTH Enumeration
C
typedef enum {
SPI_AUDIO_COMMUNICATION_24DATA_32FIFO_32CHANNEL,
SPI_AUDIO_COMMUNICATION_32DATA_32FIFO_32CHANNEL,
SPI_AUDIO_COMMUNICATION_16DATA_16FIFO_32CHANNEL,
SPI_AUDIO_COMMUNICATION_16DATA_16FIFO_16CHANNEL
} SPI_AUDIO_COMMUNICATION_WIDTH;
Description
SPI Audio Communication Width
This macro defines the list of SPI audio communication width.
Members
Members Description
SPI_AUDIO_COMMUNICATION_24DATA_32FIFO_32CHANNEL Communication is 24-bit Data,32-bit FIFO,32-bit
Channel/64-bit Frame
SPI_AUDIO_COMMUNICATION_32DATA_32FIFO_32CHANNEL Communication is 32-bit Data,32-bit FIFO,32-bit
Channel/64-bit Frame
SPI_AUDIO_COMMUNICATION_16DATA_16FIFO_32CHANNEL Communication is 16-bit Data,16-bit FIFO,32-bit
Channel/64-bit Frame
SPI_AUDIO_COMMUNICATION_16DATA_16FIFO_16CHANNEL Communication is 16-bit Data,16-bit FIFO,16-bit
Channel/64-bit Frame
5.6.22.5.7.2 SPI_AUDIO_ERROR Enumeration
C
typedef enum {
SPI_AUDIO_ERROR_RECEIVE_OVERFLOW,
SPI_AUDIO_ERROR_TRANSMIT_UNDERRUN
} SPI_AUDIO_ERROR;
Description
SPI Audio Error
This macro defines the list of SPI audio error.
Members
Members Description
SPI_AUDIO_ERROR_RECEIVE_OVERFLOW SPI error for receive overflow
SPI_AUDIO_ERROR_TRANSMIT_UNDERRUN SPI error for transmit underrun
5.6.22.5.7.3 SPI_AUDIO_PROTOCOL Enumeration
C
typedef enum {
SPI_AUDIO_PROTOCOL_PCM_DSP,
SPI_AUDIO_PROTOCOL_RIGHT_JUSTIFIED,
SPI_AUDIO_PROTOCOL_LEFT_JUSTIFIED,
SPI_AUDIO_PROTOCOL_I2S
} SPI_AUDIO_PROTOCOL;
Description
Audio Protocol Mode enumeration
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This data type defining the audio protocol mode.
Members
Members Description
SPI_AUDIO_PROTOCOL_PCM_DSP Audio protocol set to PCM/DSP mode
SPI_AUDIO_PROTOCOL_RIGHT_JUSTIFIED Audio protocol set to Right-Justified mode
SPI_AUDIO_PROTOCOL_LEFT_JUSTIFIED Audio protocol set to Left-Justified mode
SPI_AUDIO_PROTOCOL_I2S Audio protocol set to I2C mode
Remarks
This enumeration is processor specific.
5.6.22.5.7.4 SPI_AUDIO_TRANSMIT_MODE Enumeration
C
typedef enum {
SPI_AUDIO_TRANSMIT_MONO,
SPI_AUDIO_TRANSMIT_STEREO
} SPI_AUDIO_TRANSMIT_MODE;
Description
Audio Transmit mode format
This macro defines the list of SPI transmit audio mode format.
Members
Members Description
SPI_AUDIO_TRANSMIT_MONO SPI Trasmit Audio Data Format is Mono
SPI_AUDIO_TRANSMIT_STEREO SPI Trasmit Audio Data Format is Stereo
5.6.22.5.7.5 SPI_BAUD_RATE_CLOCK Enumeration
C
typedef enum {
SPI_BAUD_RATE_MCLK_CLOCK,
SPI_BAUD_RATE_PBCLK_CLOCK
} SPI_BAUD_RATE_CLOCK;
Description
SPI Baudrate generator
This macro defines the list of the SPI Baud Rate Generator.
Members
Members Description
SPI_BAUD_RATE_MCLK_CLOCK MCLK is used by the Baud Rate Generator
SPI_BAUD_RATE_PBCLK_CLOCK Peripheral bus clock is used by the Baud Rate Generator
5.6.22.5.7.6 SPI_CLOCK_POLARITY Enumeration
C
typedef enum {
SPI_CLOCK_POLARITY_IDLE_HIGH,
SPI_CLOCK_POLARITY_IDLE_LOW
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} SPI_CLOCK_POLARITY;
Description
SPI Clock polarity
This macro defines the list of SPI clock polarity.
Members
Members Description
SPI_CLOCK_POLARITY_IDLE_HIGH Idle state for clock is a high level;active state is a low level
SPI_CLOCK_POLARITY_IDLE_LOW Idle state for clock is a low level;active state is a high level
5.6.22.5.7.7 SPI_COMMUNICATION_WIDTH Enumeration
C
typedef enum {
SPI_COMMUNICATION_WIDTH_32BITS,
SPI_COMMUNICATION_WIDTH_16BITS,
SPI_COMMUNICATION_WIDTH_8BITS
} SPI_COMMUNICATION_WIDTH;
Description
SPI Communication Width
This macro defines the list of SPI communication width.
Members
Members Description
SPI_COMMUNICATION_WIDTH_32BITS Communication is 32-bit-wide
SPI_COMMUNICATION_WIDTH_16BITS Communication is word-wide
SPI_COMMUNICATION_WIDTH_8BITS Communication is byte-wide
5.6.22.5.7.8 SPI_DATA_TYPE Type
C
typedef unsigned char SPI_DATA_TYPE;
Description
SPI Data Type definition
This data type defines the SPI data size.
Remarks
None
5.6.22.5.7.9 SPI_ERROR_INTERRUPT Enumeration
C
typedef enum {
SPI_ERROR_INTERRUPT_FRAME_ERROR_OVERFLOW,
SPI_ERROR_INTERRUPT_RECEIVE_OVERFLOW,
SPI_ERROR_INTERRUPT_TRANSMIT_UNDERRUN
} SPI_ERROR_INTERRUPT;
Description
SPI Error Interrupt
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This macro defines the list of SPI error interrupts.
Members
Members Description
SPI_ERROR_INTERRUPT_FRAME_ERROR_OVERFLOW SPI interrupt for fram error
SPI_ERROR_INTERRUPT_RECEIVE_OVERFLOW SPI interrupt for receive overflow error
SPI_ERROR_INTERRUPT_TRANSMIT_UNDERRUN SPI interrupt for transmit underrun error
5.6.22.5.7.10 SPI_FIFO_INTERRUPT Enumeration
C
typedef enum {
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_BUFFER_IS_NOT_FULL,
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_BUFFER_IS_1HALF_EMPTY_OR_MORE,
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_BUFFER_IS_COMPLETELY_EMPTY,
SPI_FIFO_INTERRUPT_WHEN_RECEIVE_BUFFER_IS_1HALF_FULL_OR_MORE,
SPI_FIFO_INTERRUPT_WHEN_RECEIVE_BUFFER_IS_NOT_EMPTY,
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_BUFFER_IS_FULL,
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_FIFO_IS_EMPTY,
SPI_FIFO_INTERRUPT_WHEN_TRANSMISSION_IS_COMPLETE,
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_FIFO_HAS_ONE_SLOT,
SPI_FIFO_INTERRUPT_WHEN_RECEIVE_BUFFER_IS_FULL,
SPI_FIFO_INTERRUPT_WHEN_RECEIVE_BUFFER_IS_3FOURTH_OR_MORE_FULL,
SPI_FIFO_INTERRUPT_WHEN_DATA_IS_IN_RECEIVE_BUFFER,
SPI_FIFO_INTERRUPT_WHEN_BUFFER_IS_EMPTY
} SPI_FIFO_INTERRUPT;
Description
SPI Buffer Interrupt Mode
This macro defines the list of SPI Buffer Interrupt mode.
Members
Members Description
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_BUFFER_IS_NOT_FULL Interrupt when the transmit buffer is
not full
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_BUFFER_IS_1HALF_EMPTY_OR_MORE Interrupt when the transmit buffer is
half empty
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_BUFFER_IS_COMPLETELY_EMPTY Interrupt when the transmit buffer is
empty
SPI_FIFO_INTERRUPT_WHEN_RECEIVE_BUFFER_IS_1HALF_FULL_OR_MORE Interrupt when the receive buffer half
full or more
SPI_FIFO_INTERRUPT_WHEN_RECEIVE_BUFFER_IS_NOT_EMPTY Interrupt when the receive buffer is
not empty
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_BUFFER_IS_FULL Interrupt when transmit buffer is full
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_FIFO_IS_EMPTY Interrupt when transmit buffer is empty
SPI_FIFO_INTERRUPT_WHEN_TRANSMISSION_IS_COMPLETE Interrupt when transmission is
complete
SPI_FIFO_INTERRUPT_WHEN_TRANSMIT_FIFO_HAS_ONE_SLOT Interrupt when one slot is left in
transmit buffer
SPI_FIFO_INTERRUPT_WHEN_RECEIVE_BUFFER_IS_FULL Interrupt when receive buffer is full
SPI_FIFO_INTERRUPT_WHEN_RECEIVE_BUFFER_IS_3FOURTH_OR_MORE_FULL Interrupt when receive buffer is 3/4 or
more full
SPI_FIFO_INTERRUPT_WHEN_DATA_IS_IN_RECEIVE_BUFFER Interrupt when data is available in
receive buffer
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SPI_FIFO_INTERRUPT_WHEN_BUFFER_IS_EMPTY Interrupt when the receive buffer is
empty
5.6.22.5.7.11 SPI_FIFO_TYPE Enumeration
C
typedef enum {
SPI_FIFO_TYPE_COMMON,
SPI_FIFO_TYPE_TRNSMIT,
SPI_FIFO_TYPE_RECEIVE
} SPI_FIFO_TYPE;
Description
SPI Buffer Mode
This macro defines the list of SPI buffer mode.
Members
Members Description
SPI_FIFO_TYPE_COMMON Buffer type is common type
SPI_FIFO_TYPE_TRNSMIT Buffer type is transmit
SPI_FIFO_TYPE_RECEIVE Buffer type is receive
5.6.22.5.7.12 SPI_FRAME_PULSE_DIRECTION Enumeration
C
typedef enum {
SPI_FRAME_PULSE_DIRECTION_OUTPUT,
SPI_FRAME_PULSE_DIRECTION_INPUT
} SPI_FRAME_PULSE_DIRECTION;
Description
SPI Frame sync pulse direction
This macro defines the list of SPI frame sync pulse direction.
Members
Members Description
SPI_FRAME_PULSE_DIRECTION_OUTPUT Frame sync pulse direction is output
SPI_FRAME_PULSE_DIRECTION_INPUT Frame sync pulse direction is input
5.6.22.5.7.13 SPI_FRAME_PULSE_EDGE Enumeration
C
typedef enum {
SPI_FRAME_PULSE_EDGE_COINCIDES_FIRST_BIT_CLOCK,
SPI_FRAME_PULSE_EDGE_PRECEDES_FIRST_BIT_CLOCK
} SPI_FRAME_PULSE_EDGE;
Description
SPI Frame sync pulse edge
This macro defines the list of SPI frame sync pulse edge.
5.6 Peripheral Library Help MPLAB Harmony Help SPI Peripheral Library
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Members
Members Description
SPI_FRAME_PULSE_EDGE_COINCIDES_FIRST_BIT_CLOCK Frame sync pulse coincides with first bit clock
SPI_FRAME_PULSE_EDGE_PRECEDES_FIRST_BIT_CLOCK Frame sync pulse precedes first bit clock
5.6.22.5.7.14 SPI_FRAME_PULSE_POLARITY Enumeration
C
typedef enum {
SPI_FRAME_PULSE_POLARITY_ACTIVE_HIGH,
SPI_FRAME_PULSE_POLARITY_ACTIVE_LOW
} SPI_FRAME_PULSE_POLARITY;
Description
SPI Frame sync pulse polarity
This macro defines the list of SPI frame sync pulse polarity.
Members
Members Description
SPI_FRAME_PULSE_POLARITY_ACTIVE_HIGH Frame sync pulse is active high
SPI_FRAME_PULSE_POLARITY_ACTIVE_LOW Frame sync pulse is active low
5.6.22.5.7.15 SPI_FRAME_PULSE_WIDTH Enumeration
C
typedef enum {
SPI_FRAME_PULSE_WIDTH_ONE_WORD_LENGTH,
SPI_FRAME_PULSE_WIDTH_ONE_CLOCK_WIDE
} SPI_FRAME_PULSE_WIDTH;
Description
SPI Frame sync pulse width
This macro defines the list of SPI frame sync pulse width.
Members
Members Description
SPI_FRAME_PULSE_WIDTH_ONE_WORD_LENGTH Frame sync Pulse width as one word length wide
SPI_FRAME_PULSE_WIDTH_ONE_CLOCK_WIDE Frame sync Pulse width as one clock wide
5.6.22.5.7.16 SPI_FRAME_SYNC_PULSE Enumeration
C
typedef enum {
SPI_FRAME_SYNC_PULSE_ON_EVERY_32_DATA_CHARACTER,
SPI_FRAME_SYNC_PULSE_ON_EVERY_16_DATA_CHARACTER,
SPI_FRAME_SYNC_PULSE_ON_EVERY_8_DATA_CHARACTER,
SPI_FRAME_SYNC_PULSE_ON_EVERY_4_DATA_CHARACTER,
SPI_FRAME_SYNC_PULSE_ON_EVERY_2_DATA_CHARACTER,
SPI_FRAME_SYNC_PULSE_ON_EVERY_DATA_CHARACTER
} SPI_FRAME_SYNC_PULSE;
Description
Frame Sync Pulse Counter enumeration
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This data type defining the frame sync pulse counter values.
Members
Members Description
SPI_FRAME_SYNC_PULSE_ON_EVERY_32_DATA_CHARACTER Generate a fram sync pulse on every 32 data character
SPI_FRAME_SYNC_PULSE_ON_EVERY_16_DATA_CHARACTER Generate a fram sync pulse on every 16 data character
SPI_FRAME_SYNC_PULSE_ON_EVERY_8_DATA_CHARACTER Generate a fram sync pulse on every 8 data character
SPI_FRAME_SYNC_PULSE_ON_EVERY_4_DATA_CHARACTER Generate a fram sync pulse on every 4 data character
SPI_FRAME_SYNC_PULSE_ON_EVERY_2_DATA_CHARACTER Generate a fram sync pulse on every 2 data character
SPI_FRAME_SYNC_PULSE_ON_EVERY_DATA_CHARACTER Generate a fram sync pulse on every data character
5.6.22.5.7.17 SPI_INPUT_SAMPLING_PHASE Enumeration
C
typedef enum {
SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE,
SPI_INPUT_SAMPLING_PHASE_AT_END
} SPI_INPUT_SAMPLING_PHASE;
Description
SPI Data Input Sample Phase
This macro defines the list of SPI data input sample phase.
Members
Members Description
SPI_INPUT_SAMPLING_PHASE_IN_MIDDLE SPI Data Input Sample phase in middle
SPI_INPUT_SAMPLING_PHASE_AT_END SPI Data Input Sample phase at end
5.6.22.5.7.18 SPI_MODULE_ID Enumeration
C
typedef enum {
SPI_ID_1,
SPI_ID_2,
SPI_ID_3,
SPI_ID_4,
SPI_NUMBER_OF_MODULES
} SPI_MODULE_ID;
Description
SPI Module ID
This enumeration identifies the SPI modules that are available on a microcontroller. This is the superset of all the possible
instances that might be available on Microchip microcontrollers.
Members
Members Description
SPI_ID_1 SPI Module 1 ID
SPI_ID_2 SPI Module 2 ID
SPI_ID_3 SPI Module 3 ID
SPI_ID_4 SPI Module 4 ID
SPI_NUMBER_OF_MODULES Number of available SPI modules.
5.6 Peripheral Library Help MPLAB Harmony Help SPI Peripheral Library
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Remarks
The caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to
the next.
Not all modules will be available on all microcontrollers. Refer to the data sheet for the specific controller in use to determine
which modules are supported. The numbers used in the enumeration values will match the numbers given in the data sheet.
5.6.22.5.7.19 SPI_OUTPUT_DATA_PHASE Enumeration
C
typedef enum {
SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK,
SPI_OUTPUT_DATA_PHASE_ON_IDLE_TO_ACTIVE_CLOCK
} SPI_OUTPUT_DATA_PHASE;
Description
SPI Ouput Data Phase
This macro defines the list of SPI serial output data changes.
Members
Members Description
SPI_OUTPUT_DATA_PHASE_ON_ACTIVE_TO_IDLE_CLOCK Serial output data changes on transition from active clock
state to idle clock state
SPI_OUTPUT_DATA_PHASE_ON_IDLE_TO_ACTIVE_CLOCK Serial output data changes on transition from idle clock state
to active clock state.
5.6.22.5.7.20 SPI_PIN Enumeration
C
typedef enum {
SPI_PIN_SERIAL_CLOCK,
SPI_PIN_DATA_OUT,
SPI_PIN_DATA_IN,
SPI_PIN_SLAVE_SELECT
} SPI_PIN;
Description
SPI pin
This data type defining the SPI pin.
Members
Members Description
SPI_PIN_SERIAL_CLOCK SPI clock pin
SPI_PIN_DATA_OUT SPI data output pin
SPI_PIN_DATA_IN SPI data input pin
SPI_PIN_SLAVE_SELECT SPI slave select pin
Remarks
This enumeration is processor specific.
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5.6.22.5.7.21 SPI_PRESCALE_PRIMARY Enumeration
C
typedef enum {
SPI_PRESCALE_PRIMARY_1,
SPI_PRESCALE_PRIMARY_4,
SPI_PRESCALE_PRIMARY_16,
SPI_PRESCALE_PRIMARY_64
} SPI_PRESCALE_PRIMARY;
Description
Primary Prescaler Values
This macro defines the list of possible primary prescaler values.
Members
Members Description
SPI_PRESCALE_PRIMARY_1 SPI Primary Prescaler Value 1:1
SPI_PRESCALE_PRIMARY_4 SPI Primary Prescaler Value 4:1
SPI_PRESCALE_PRIMARY_16 SPI Primary Prescaler Value 16:1
SPI_PRESCALE_PRIMARY_64 SPI Primary Prescaler Value 64:1
5.6.22.5.7.22 SPI_PRESCALE_SECONDARY Enumeration
C
typedef enum {
SPI_PRESCALE_SECONDARY_1,
SPI_PRESCALE_SECONDARY_2,
SPI_PRESCALE_SECONDARY_3,
SPI_PRESCALE_SECONDARY_4,
SPI_PRESCALE_SECONDARY_5,
SPI_PRESCALE_SECONDARY_6,
SPI_PRESCALE_SECONDARY_7,
SPI_PRESCALE_SECONDARY_8
} SPI_PRESCALE_SECONDARY;
Description
Secondary Prescaler Values
This macro defines the list of possible secondary prescaler values.
Members
Members Description
SPI_PRESCALE_SECONDARY_1 SPI Seconday Prescaler Value 1:1
SPI_PRESCALE_SECONDARY_2 SPI Seconday Prescaler Value 2:1
SPI_PRESCALE_SECONDARY_3 SPI Seconday Prescaler Value 3:1
SPI_PRESCALE_SECONDARY_4 SPI Seconday Prescaler Value 4:1
SPI_PRESCALE_SECONDARY_5 SPI Seconday Prescaler Value 5:1
SPI_PRESCALE_SECONDARY_6 SPI Seconday Prescaler Value 6:1
SPI_PRESCALE_SECONDARY_7 SPI Seconday Prescaler Value 7:1
SPI_PRESCALE_SECONDARY_8 SPI Seconday Prescaler Value 8:1
5.6.22.5.8 Feature Existence Functions
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5.6.22.5.8.1 PLIB_SPI_ExistsAudioCommunicationWidth Function
C
bool PLIB_SPI_ExistsAudioCommunicationWidth(
SPI_MODULE_ID index
);
Description
This function identifies whether the AudioCommunicationWidth feature is available on the SPI module. When this function
returns true, this function is supported on the device:
• PLIB_SPI_AudioCommunicationWidthSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AudioCommunicationWidth feature is supported on the device
• false - The AudioCommunicationWidth feature is not supported on the device
Remarks
None.
5.6.22.5.8.2 PLIB_SPI_ExistsAudioErrorControl Function
C
bool PLIB_SPI_ExistsAudioErrorControl(
SPI_MODULE_ID index
);
Description
This function identifies whether the AudioErrorControl feature is available on the SPI module. When this function returns true,
these functions are supported on the device:
• PLIB_SPI_AudioErrorEnable
• PLIB_SPI_AudioErrorDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AudioErrorControl feature is supported on the device
• false - The AudioErrorControl feature is not supported on the device
Remarks
None.
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5.6.22.5.8.3 PLIB_SPI_ExistsAudioProtocolControl Function
C
bool PLIB_SPI_ExistsAudioProtocolControl(
SPI_MODULE_ID index
);
Description
This function identifies whether the AudioProtocolControl feature is available on the SPI module. When this function returns true,
these functions are supported on the device:
• PLIB_SPI_AudioProtocolEnable
• PLIB_SPI_AudioProtocolDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AudioProtocolControl feature is supported on the device
• false - The AudioProtocolControl feature is not supported on the device
Remarks
None.
5.6.22.5.8.4 PLIB_SPI_ExistsAudioProtocolMode Function
C
bool PLIB_SPI_ExistsAudioProtocolMode(
SPI_MODULE_ID index
);
Description
This function identifies whether the AudioProtocolMode feature is available on the SPI module. When this function returns true,
this function is supported on the device:
• PLIB_SPI_AudioProtocolModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AudioProtocolMode feature is supported on the device
• false - The AudioProtocolMode feature is not supported on the device
Remarks
None.
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5.6.22.5.8.5 PLIB_SPI_ExistsAudioTransmitMode Function
C
bool PLIB_SPI_ExistsAudioTransmitMode(
SPI_MODULE_ID index
);
Description
This function identifies whether the AudioTransmitMode feature is available on the SPI module. When this function returns true,
this function is supported on the device:
• PLIB_SPI_AudioTransmitModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AudioTransmitMode feature is supported on the device
• false - The AudioTransmitMode feature is not supported on the device
Remarks
None.
5.6.22.5.8.6 PLIB_SPI_ExistsBaudRate Function
C
bool PLIB_SPI_ExistsBaudRate(
SPI_MODULE_ID index
);
Description
This function identifies whether the BaudRate feature is available on the SPI module. When this function returns true, this
function is supported on the device:
• PLIB_SPI_BaudRateSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BaudRate feature is supported on the device
• false - The BaudRate feature is not supported on the device
Remarks
None.
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5.6.22.5.8.7 PLIB_SPI_ExistsBaudRateClock Function
C
bool PLIB_SPI_ExistsBaudRateClock(
SPI_MODULE_ID index
);
Description
This function identifies whether the BaudRateClock feature is available on the SPI module. When this function returns true, this
function is supported on the device:
• PLIB_SPI_BaudRateClockSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BaudRateClock feature is supported on the device
• false - The BaudRateClock feature is not supported on the device
Remarks
None.
5.6.22.5.8.8 PLIB_SPI_ExistsBuffer Function
C
bool PLIB_SPI_ExistsBuffer(
SPI_MODULE_ID index
);
Description
This function identifies whether the Buffer feature is available on the SPI module. When this function returns true, these functions
are supported on the device:
• PLIB_SPI_BufferClear
• PLIB_SPI_BufferRead
• PLIB_SPI_BufferWrite
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Buffer feature is supported on the device
• false - The Buffer feature is not supported on the device
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Remarks
None.
5.6.22.5.8.9 PLIB_SPI_ExistsBusStatus Function
C
bool PLIB_SPI_ExistsBusStatus(
SPI_MODULE_ID index
);
Description
This function identifies whether the BusStatus feature is available on the SPI module. When this function returns true, this
function is supported on the device:
• PLIB_SPI_IsBusy
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BusStatus feature is supported on the device
• false - The BusStatus feature is not supported on the device
Remarks
None.
5.6.22.5.8.10 PLIB_SPI_ExistsClockPolarity Function
C
bool PLIB_SPI_ExistsClockPolarity(
SPI_MODULE_ID index
);
Description
This function identifies whether the ClockPolarity feature is available on the SPI module. When this function returns true, this
function is supported on the device:
• PLIB_SPI_ClockPolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ClockPolarity feature is supported on the device
• false - The ClockPolarity feature is not supported on the device
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Remarks
None.
5.6.22.5.8.11 PLIB_SPI_ExistsCommunicationWidth Function
C
bool PLIB_SPI_ExistsCommunicationWidth(
SPI_MODULE_ID index
);
Description
This function identifies whether the CommunicationWidth feature is available on the SPI module. When this function returns true,
this function is supported on the device:
• PLIB_SPI_CommunicationWidthSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CommunicationWidth feature is supported on the device
• false - The CommunicationWidth feature is not supported on the device
Remarks
None.
5.6.22.5.8.12 PLIB_SPI_ExistsEnableControl Function
C
bool PLIB_SPI_ExistsEnableControl(
SPI_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the SPI module. When this function returns true, these
functions are supported on the device:
• PLIB_SPI_Enable
• PLIB_SPI_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EnableControl feature is supported on the device
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• false - The EnableControl feature is not supported on the device
Remarks
None.
5.6.22.5.8.13 PLIB_SPI_ExistsErrorInterruptControl Function
C
bool PLIB_SPI_ExistsErrorInterruptControl(
SPI_MODULE_ID index
);
Description
This function identifies whether the ErrorInterruptControl feature is available on the SPI module. When this function returns true,
these functions are supported on the device:
• PLIB_SPI_ErrorInterruptEnable
• PLIB_SPI_ErrorInterruptDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ErrorInterruptControl feature is supported on the device
• false - The ErrorInterruptControl feature is not supported on the device
Remarks
None.
5.6.22.5.8.14 PLIB_SPI_ExistsFIFOControl Function
C
bool PLIB_SPI_ExistsFIFOControl(
SPI_MODULE_ID index
);
Description
This function identifies whether the FIFOControl feature is available on the SPI module. When this function returns true, these
functions are supported on the device:
• PLIB_SPI_FIFOEnable
• PLIB_SPI_FIFODisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The FIFOControl feature is supported on the device
• false - The FIFOControl feature is not supported on the device
Remarks
None.
5.6.22.5.8.15 PLIB_SPI_ExistsFIFOCount Function
C
bool PLIB_SPI_ExistsFIFOCount(
SPI_MODULE_ID index
);
Description
This function identifies whether the FIFOCount feature is available on the SPI module. When this function returns true, this
function is supported on the device:
• PLIB_SPI_FIFOCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FIFOCount feature is supported on the device
• false - The FIFOCount feature is not supported on the device
Remarks
None.
5.6.22.5.8.16 PLIB_SPI_ExistsFIFOInterruptMode Function
C
bool PLIB_SPI_ExistsFIFOInterruptMode(
SPI_MODULE_ID index
);
Description
This function identifies whether the FIFOInterruptMode feature is available on the SPI module. When this function returns true,
this function is supported on the device:
• PLIB_SPI_FIFOInterruptModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The FIFOInterruptMode feature is supported on the device
• false - The FIFOInterruptMode feature is not supported on the device
Remarks
None.
5.6.22.5.8.17 PLIB_SPI_ExistsFIFOShiftRegisterEmptyStatus Function
C
bool PLIB_SPI_ExistsFIFOShiftRegisterEmptyStatus(
SPI_MODULE_ID index
);
Description
This function identifies whether the FIFOShiftRegisterEmptyStatus feature is available on the SPI module. When this function
returns true, this function is supported on the device:
• PLIB_SPI_FIFOShiftRegisterIsEmpty
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FIFOShiftRegisterEmptyStatus feature is supported on the device
• false - The FIFOShiftRegisterEmptyStatus feature is not supported on the device
Remarks
None.
5.6.22.5.8.18 PLIB_SPI_ExistsFramedCommunication Function
C
bool PLIB_SPI_ExistsFramedCommunication(
SPI_MODULE_ID index
);
Description
This function identifies whether the FramedCommunication feature is available on the SPI module. When this function returns
true, these functions are supported on the device:
• PLIB_SPI_FramedCommunicationEnable
• PLIB_SPI_FramedCommunicationDisable
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FramedCommunication feature is supported on the device
• false - The FramedCommunication feature is not supported on the device
Remarks
None.
5.6.22.5.8.19 PLIB_SPI_ExistsFrameErrorStatus Function
C
bool PLIB_SPI_ExistsFrameErrorStatus(
SPI_MODULE_ID index
);
Description
This function identifies whether the FrameErrorStatus feature is available on the SPI module. When this function returns true,
this function is supported on the device:
• PLIB_SPI_FrameErrorStatusGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FrameErrorStatus feature is supported on the device
• false - The FrameErrorStatus feature is not supported on the device
Remarks
None.
5.6.22.5.8.20 PLIB_SPI_ExistsFrameSyncPulseCounter Function
C
bool PLIB_SPI_ExistsFrameSyncPulseCounter(
SPI_MODULE_ID index
);
Description
This function identifies whether the FrameSyncPulseCounter feature is available on the SPI module. When this function returns
true, this function is supported on the device:
• PLIB_SPI_FrameSyncPulseCounterSelect
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FrameSyncPulseCounter feature is supported on the device
• false - The FrameSyncPulseCounter feature is not supported on the device
Remarks
None.
5.6.22.5.8.21 PLIB_SPI_ExistsFrameSyncPulseDirection Function
C
bool PLIB_SPI_ExistsFrameSyncPulseDirection(
SPI_MODULE_ID index
);
Description
This function identifies whether the FrameSyncPulseDirection feature is available on the SPI module. When this function returns
true, this function is supported on the device:
• PLIB_SPI_FrameSyncPulseDirectionSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FrameSyncPulseDirection feature is supported on the device
• false - The FrameSyncPulseDirection feature is not supported on the device
Remarks
None.
5.6.22.5.8.22 PLIB_SPI_ExistsFrameSyncPulseEdge Function
C
bool PLIB_SPI_ExistsFrameSyncPulseEdge(
SPI_MODULE_ID index
);
Description
This function identifies whether the FrameSyncPulseEdge feature is available on the SPI module. When this function returns
true, this function is supported on the device:
• PLIB_SPI_FrameSyncPulseEdgeSelect
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FrameSyncPulseEdge feature is supported on the device
• false - The FrameSyncPulseEdge feature is not supported on the device
Remarks
None.
5.6.22.5.8.23 PLIB_SPI_ExistsFrameSyncPulsePolarity Function
C
bool PLIB_SPI_ExistsFrameSyncPulsePolarity(
SPI_MODULE_ID index
);
Description
This function identifies whether the FrameSyncPulsePolarity feature is available on the SPI module. When this function returns
true, this function is supported on the device:
• PLIB_SPI_FrameSyncPulsePolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FrameSyncPulsePolarity feature is supported on the device
• false - The FrameSyncPulsePolarity feature is not supported on the device
Remarks
None.
5.6.22.5.8.24 PLIB_SPI_ExistsFrameSyncPulseWidth Function
C
bool PLIB_SPI_ExistsFrameSyncPulseWidth(
SPI_MODULE_ID index
);
Description
This function identifies whether the FrameSyncPulseWidth feature is available on the SPI module. When this function returns
true, this function is supported on the device:
• PLIB_SPI_FrameSyncPulseWidthSelect
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FrameSyncPulseWidth feature is supported on the device
• false - The FrameSyncPulseWidth feature is not supported on the device
Remarks
None.
5.6.22.5.8.25 PLIB_SPI_ExistsInputSamplePhase Function
C
bool PLIB_SPI_ExistsInputSamplePhase(
SPI_MODULE_ID index
);
Description
This function identifies whether the InputSamplePhase feature is available on the SPI module. When this function returns true,
this function is supported on the device:
• PLIB_SPI_InputSamplePhaseSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The InputSamplePhase feature is supported on the device
• false - The InputSamplePhase feature is not supported on the device
Remarks
None.
5.6.22.5.8.26 PLIB_SPI_ExistsMasterControl Function
C
bool PLIB_SPI_ExistsMasterControl(
SPI_MODULE_ID index
);
Description
This function identifies whether the MasterControl feature is available on the SPI module. When this function returns true, these
functions are supported on the device:
• PLIB_SPI_MasterEnable
• PLIB_SPI_SlaveEnable
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The MasterControl feature is supported on the device
• false - The MasterControl feature is not supported on the device
Remarks
None.
5.6.22.5.8.27 PLIB_SPI_ExistsOutputDataPhase Function
C
bool PLIB_SPI_ExistsOutputDataPhase(
SPI_MODULE_ID index
);
Description
This function identifies whether the OutputDataPhase feature is available on the SPI module. When this function returns true,
this function is supported on the device:
• PLIB_SPI_OutputDataPhaseSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OutputDataPhase feature is supported on the device
• false - The OutputDataPhase feature is not supported on the device
Remarks
None.
5.6.22.5.8.28 PLIB_SPI_ExistsPinControl Function
C
bool PLIB_SPI_ExistsPinControl(
SPI_MODULE_ID index
);
Description
This function identifies whether the PinControl feature is available on the SPI module. When this function returns true, these
functions are supported on the device:
• PLIB_SPI_PinEnable
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• PLIB_SPI_PinDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PinControl feature is supported on the device
• false - The PinControl feature is not supported on the device
Remarks
None.
5.6.22.5.8.29 PLIB_SPI_ExistsPrimaryPrescale Function
C
bool PLIB_SPI_ExistsPrimaryPrescale(
SPI_MODULE_ID index
);
Description
This function identifies whether the PrimaryPrescale feature is available on the SPI module. When this function returns true, this
function is supported on the device:
• PLIB_SPI_PrescalePrimarySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PrimaryPrescale feature is supported on the device
• false - The PrimaryPrescale feature is not supported on the device
Remarks
None.
5.6.22.5.8.30 PLIB_SPI_ExistsReadDataSignStatus Function
C
bool PLIB_SPI_ExistsReadDataSignStatus(
SPI_MODULE_ID index
);
Description
This function identifies whether the ReadDataSignStatus feature is available on the SPI module. When this function returns true,
this function is supported on the device:
• PLIB_SPI_ReadDataIsSignExtended
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReadDataSignStatus feature is supported on the device
• false - The ReadDataSignStatus feature is not supported on the device
Remarks
None.
5.6.22.5.8.31 PLIB_SPI_ExistsReceiveBufferStatus Function
C
bool PLIB_SPI_ExistsReceiveBufferStatus(
SPI_MODULE_ID index
);
Description
This function identifies whether the ReceiveBufferStatus feature is available on the SPI module. When this function returns true,
this function is are supported on the device:
• PLIB_SPI_ReceiverBufferIsFull
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiveBufferStatus feature is supported on the device
• false - The ReceiveBufferStatus feature is not supported on the device
Remarks
None.
5.6.22.5.8.32 PLIB_SPI_ExistsReceiveFIFOStatus Function
C
bool PLIB_SPI_ExistsReceiveFIFOStatus(
SPI_MODULE_ID index
);
Description
This function identifies whether the ReceiveFIFOStatus feature is available on the SPI module. When this function returns true,
this function is supported on the device:
• PLIB_SPI_ReceiverFIFOIsEmpty
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiveFIFOStatus feature is supported on the device
• false - The ReceiveFIFOStatus feature is not supported on the device
Remarks
None.
5.6.22.5.8.33 PLIB_SPI_ExistsReceiverOverflow Function
C
bool PLIB_SPI_ExistsReceiverOverflow(
SPI_MODULE_ID index
);
Description
This function identifies whether the ReceiverOverflow feature is available on the SPI module. When this function returns true,
these functions are supported on the device:
• PLIB_SPI_ReceiverHasOverflowed
• PLIB_SPI_ReceiverOverflowClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverOverflow feature is supported on the device
• false - The ReceiverOverflow feature is not supported on the device
Remarks
None.
5.6.22.5.8.34 PLIB_SPI_ExistsSecondaryPrescale Function
C
bool PLIB_SPI_ExistsSecondaryPrescale(
SPI_MODULE_ID index
);
Description
This function identifies whether the SecondaryPrescale feature is available on the SPI module. When this function returns true,
this function is supported on the device:
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• PLIB_SPI_PrescaleSecondarySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SecondaryPrescale feature is supported on the device
• false - The SecondaryPrescale feature is not supported on the device
Remarks
None.
5.6.22.5.8.35 PLIB_SPI_ExistsSlaveSelectControl Function
C
bool PLIB_SPI_ExistsSlaveSelectControl(
SPI_MODULE_ID index
);
Description
This function identifies whether the SlaveSelectControl feature is available on the SPI module. When this function returns true,
these functions are supported on the device:
• PLIB_SPI_SlaveSelectEnable
• PLIB_SPI_SlaveSelectDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SlaveSelectControl feature is supported on the device
• false - The SlaveSelectControl feature is not supported on the device
Remarks
None.
5.6.22.5.8.36 PLIB_SPI_ExistsStopInIdleControl Function
C
bool PLIB_SPI_ExistsStopInIdleControl(
SPI_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the SPI module. When this function returns true, these
functions are supported on the device:
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• PLIB_SPI_StopInIdleEnable
• PLIB_SPI_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StopInIdle feature is supported on the device
• false - The StopInIdle feature is not supported on the device
Remarks
None.
5.6.22.5.8.37 PLIB_SPI_ExistsTransmitBufferEmptyStatus Function
C
bool PLIB_SPI_ExistsTransmitBufferEmptyStatus(
SPI_MODULE_ID index
);
Description
This function identifies whether the TransmitBufferEmptyStatus feature is available on the SPI module. When this function
returns true, this function is are supported on the device:
• PLIB_SPI_TransmitBufferIsEmpty
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitBufferEmptyStatus feature is supported on the device
• false - The TransmitBufferEmptyStatus feature is not supported on the device
Remarks
None.
5.6.22.5.8.38 PLIB_SPI_ExistsTransmitBufferFullStatus Function
C
bool PLIB_SPI_ExistsTransmitBufferFullStatus(
SPI_MODULE_ID index
);
Description
This function identifies whether the TransmitBufferFullStatus feature is available on the SPI module. When this function returns
true, this function is supported on the device:
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• PLIB_SPI_TransmitBufferIsFull
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitBufferFullStatus feature is supported on the device
• false - The TransmitBufferFullStatus feature is not supported on the device
Remarks
None.
5.6.22.5.8.39 PLIB_SPI_ExistsTransmitUnderRunStatus Function
C
bool PLIB_SPI_ExistsTransmitUnderRunStatus(
SPI_MODULE_ID index
);
Description
This function identifies whether the TransmitUnderRunStatus feature is available on the SPI module. When this function returns
true, this function is supported on the device:
• PLIB_SPI_TransmitUnderRunStatusGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitUnderRunStatus feature is supported on the device
• false - The TransmitUnderRunStatus feature is not supported on the device
Remarks
None.
5.6.22.6 Files
Files
Name Description
plib_spi.h SPI PLIB Interface Header for common definitions
Description
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5.6.22.6.1 plib_spi.h
SPI Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
SPI PLIB.
Functions
Name Description
PLIB_SPI_AudioCommunicationWidthSelect Selects the data width for the SPI audio communication.
PLIB_SPI_AudioErrorDisable Disables the SPI error.
PLIB_SPI_AudioErrorEnable Enables the SPI error.
PLIB_SPI_AudioProtocolDisable Audio protocol is disabled.
PLIB_SPI_AudioProtocolEnable Audio protocol is enabled.
PLIB_SPI_AudioProtocolModeSelect Selects the Audio Protocol mode.
PLIB_SPI_AudioTransmitModeSelect Selects the transmit audio data format.
PLIB_SPI_BaudRateClockSelect Selects the type of clock is used by the Baud Rate Generator.
PLIB_SPI_BaudRateSet Sets the baud rate to the desired value.
PLIB_SPI_BufferClear Clears the SPI buffer.
PLIB_SPI_BufferRead Returns the SPI buffer value.
PLIB_SPI_BufferWrite Write the data to the SPI buffer.
PLIB_SPI_ClockPolaritySelect Enables clock polarity.
PLIB_SPI_CommunicationWidthSelect Selects the data width for the SPI communication.
PLIB_SPI_Disable Disables the SPI module.
PLIB_SPI_Enable Enables the SPI module.
PLIB_SPI_ErrorInterruptDisable Enables SPI error interrupts.
PLIB_SPI_ErrorInterruptEnable Enables SPI error interrupts
PLIB_SPI_ExistsAudioCommunicationWidth Identifies whether the AudioCommunicationWidth feature exists
on the SPI module.
PLIB_SPI_ExistsAudioErrorControl Identifies whether the AudioErrorControl feature exists on the SPI
module.
PLIB_SPI_ExistsAudioProtocolControl Identifies whether the AudioProtocolControl feature exists on the
SPI module.
PLIB_SPI_ExistsAudioProtocolMode Identifies whether the AudioProtocolMode feature exists on the
SPI module.
PLIB_SPI_ExistsAudioTransmitMode Identifies whether the AudioTransmitMode feature exists on the
SPI module.
PLIB_SPI_ExistsBaudRate Identifies whether the BaudRate feature exists on the SPI module.
PLIB_SPI_ExistsBaudRateClock Identifies whether the BaudRateClock feature exists on the SPI
module.
PLIB_SPI_ExistsBuffer Identifies whether the Buffer feature exists on the SPI module.
PLIB_SPI_ExistsBusStatus Identifies whether the BusStatus feature exists on the SPI module.
PLIB_SPI_ExistsClockPolarity Identifies whether the ClockPolarity feature exists on the SPI
module.
PLIB_SPI_ExistsCommunicationWidth Identifies whether the CommunicationWidth feature exists on the
SPI module.
PLIB_SPI_ExistsEnableControl Identifies whether the EnableControl feature exists on the SPI
module.
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PLIB_SPI_ExistsErrorInterruptControl Identifies whether the ErrorInterruptControl feature exists on the
SPI module.
PLIB_SPI_ExistsFIFOControl Identifies whether the FIFOControl feature exists on the SPI
module.
PLIB_SPI_ExistsFIFOCount Identifies whether the FIFOCount feature exists on the SPI
module.
PLIB_SPI_ExistsFIFOInterruptMode Identifies whether the FIFOInterruptMode feature exists on the
SPI module.
PLIB_SPI_ExistsFIFOShiftRegisterEmptyStatus Identifies whether the FIFOShiftRegisterEmptyStatus feature
exists on the SPI module.
PLIB_SPI_ExistsFramedCommunication Identifies whether the FramedCommunication feature exists on
the SPI module.
PLIB_SPI_ExistsFrameErrorStatus Identifies whether the FrameErrorStatus feature exists on the SPI
module.
PLIB_SPI_ExistsFrameSyncPulseCounter Identifies whether the FrameSyncPulseCounter feature exists on
the SPI module.
PLIB_SPI_ExistsFrameSyncPulseDirection Identifies whether the FrameSyncPulseDirection feature exists on
the SPI module.
PLIB_SPI_ExistsFrameSyncPulseEdge Identifies whether the FrameSyncPulseEdge feature exists on the
SPI module.
PLIB_SPI_ExistsFrameSyncPulsePolarity Identifies whether the FrameSyncPulsePolarity feature exists on
the SPI module.
PLIB_SPI_ExistsFrameSyncPulseWidth Identifies whether the FrameSyncPulseWidth feature exists on
the SPI module.
PLIB_SPI_ExistsInputSamplePhase Identifies whether the InputSamplePhase feature exists on the
SPI module.
PLIB_SPI_ExistsMasterControl Identifies whether the MasterControl feature exists on the SPI
module.
PLIB_SPI_ExistsOutputDataPhase Identifies whether the OutputDataPhase feature exists on the SPI
module.
PLIB_SPI_ExistsPinControl Identifies whether the PinControl feature exists on the SPI module.
PLIB_SPI_ExistsPrimaryPrescale Identifies whether the PrimaryPrescale feature exists on the SPI
module.
PLIB_SPI_ExistsReadDataSignStatus Identifies whether the ReadDataSignStatus feature exists on the
SPI module.
PLIB_SPI_ExistsReceiveBufferStatus Identifies whether the ReceiveBufferStatus feature exists on the
SPI module.
PLIB_SPI_ExistsReceiveFIFOStatus Identifies whether the ReceiveFIFOStatus feature exists on the
SPI module.
PLIB_SPI_ExistsReceiverOverflow Identifies whether the ReceiverOverflow feature exists on the SPI
module.
PLIB_SPI_ExistsSecondaryPrescale Identifies whether the SecondaryPrescale feature exists on the
SPI module.
PLIB_SPI_ExistsSlaveSelectControl Identifies whether the SlaveSelectControl feature exists on the
SPI module.
PLIB_SPI_ExistsStopInIdleControl Identifies whether the StopInIdle feature exists on the SPI module.
PLIB_SPI_ExistsTransmitBufferEmptyStatus Identifies whether the TransmitBufferEmptyStatus feature exists
on the SPI module.
PLIB_SPI_ExistsTransmitBufferFullStatus Identifies whether the TransmitBufferFullStatus feature exists on
the SPI module.
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PLIB_SPI_ExistsTransmitUnderRunStatus Identifies whether the TransmitUnderRunStatus feature exists on
the SPI module.
PLIB_SPI_FIFOCountGet Reads the SPI Buffer Element Count bits for either receive or
transmit.
PLIB_SPI_FIFODisable Disables the SPI enhanced buffer.
PLIB_SPI_FIFOEnable Enables the SPI enhanced buffer.
PLIB_SPI_FIFOInterruptModeSelect Selects the SPI buffer interrupt mode.
PLIB_SPI_FIFOShiftRegisterIsEmpty Returns the current status of the SPI shift register.
PLIB_SPI_FramedCommunicationDisable Disables framed SPI support.
PLIB_SPI_FramedCommunicationEnable Enables framed SPI support.
PLIB_SPI_FrameErrorStatusGet Returns the current status of the SPI frame error.
PLIB_SPI_FrameSyncPulseCounterSelect Selects at which character the SPI frame sync pulse is generated.
PLIB_SPI_FrameSyncPulseDirectionSelect Selects the frame sync pulse direction.
PLIB_SPI_FrameSyncPulseEdgeSelect Selects the frame sync pulse edge.
PLIB_SPI_FrameSyncPulsePolaritySelect Selects the frame sync pulse polarity.
PLIB_SPI_FrameSyncPulseWidthSelect Sets the frame sync pulse width.
PLIB_SPI_InputSamplePhaseSelect Selects the SPI data input sample phase.
PLIB_SPI_IsBusy Returns the current SPI module activity status.
PLIB_SPI_MasterEnable Enables the SPI in Master mode.
PLIB_SPI_OutputDataPhaseSelect Selects serial output data change.
PLIB_SPI_PinDisable Enables the selected SPI pins.
PLIB_SPI_PinEnable Enables the selected SPI pins.
PLIB_SPI_PrescalePrimarySelect Selects the primary prescale for SPI Master mode.
PLIB_SPI_PrescaleSecondarySelect Selects the seconday prescale for SPI Master mode.
PLIB_SPI_ReadDataIsSignExtended Returns the current status of the receive (RX) FIFO
sign-extended data.
PLIB_SPI_ReceiverBufferIsFull Returns the current status of the SPI receive buffer.
PLIB_SPI_ReceiverFIFOIsEmpty Returns the current status of the SPI receive FIFO.
PLIB_SPI_ReceiverHasOverflowed Returns the current status of the SPI receiver overflow.
PLIB_SPI_ReceiverOverflowClear Clears the SPI receive overflow flag.
PLIB_SPI_SlaveEnable Enables the SPI in Slave mode.
PLIB_SPI_SlaveSelectDisable Disables Master mode slave select.
PLIB_SPI_SlaveSelectEnable Enables Master mode slave select.
PLIB_SPI_StopInIdleDisable Continues module operation when the device enters Idle mode.
PLIB_SPI_StopInIdleEnable Discontinues module operation when the device enters Idle mode.
PLIB_SPI_TransmitBufferIsEmpty Returns the current status of the transmit buffer.
PLIB_SPI_TransmitBufferIsFull Returns the current transmit buffer status of the SPI module.
PLIB_SPI_TransmitUnderRunStatusGet Returns the current status of the transmit underrun.
Types
Name Description
SPI_DATA_TYPE Data type defining the SPI data size.
File Name
plib_spi.h
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Company
Microchip Technology Inc.
5.6.23 SQI Peripheral Library
5.6.23.1 Introduction
SQI Peripheral Library for Microchip Microcontrollers
This library provides a low-level abstraction of the Serial Quad Interface (SQI) Peripheral that is available on the Microchip family
of microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the SQI module without
the necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller variant to
another.
Description
The SQI module is a synchronous serial interface that provides access to serial Flash memories and other serial devices. The
SQI bus interface consists of four data lines (SQID3-SQID0), a clock line (SQICLK), two select lines (SQICS0 and SQICS1) and
the module supports single Lane (identical to SPI), dual Lane, and quad Lane interface modes. SQI operates in only master
mode. The SQI module has configurable transmit and receive buffers, programmable baud rates through the internal clock
divider, clock phase, and clock polarity control for efficient data operations. Transmit and receive buffers can be accessed
through SQITXDATA and SQIRXDATA registers. Similarly, the control buffer can be accessed through the SQI1CON register
and is mainly used to pipeline the operations.
The SQI module operates in three transfer modes: DMA, PIO, and XIP using three data flow modes:SPI Mode 0 and Mode 3,
and a high-speed Serial Flash mode . All three modes use the control buffer to pipeline the command/data sequences on the
SQI bus. Following diagrams describe typical SQI hardware interface and software flow. Figure 1 shows the typical hardware
interface of SQI module:
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Figure 1: Hardware Interface Diagram
Refer to SQI Family Reference Manual section, which is available on Microchip website for additional details on control register
information and operation.
5.6.23.2 Release Notes
MPLAB Harmony Version: v0.70b SQI Peripheral Library Version :0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.23.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip, its
subsidiaries and its licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.23.4 Using the Library
This topic describes the basic architecture of the SQI Peripheral Library and provides information and examples on how to use it.
Interface Header File: plib_sqi. h
The interface to the SQI peripheral library is defined in the "plib_sqi.h" header file. This file is included by the "peripheral.h" file.
Any C language source (.c) file that uses the SQI peripheral library should include "peripheral.h".
Library File:
The SQI peripheral library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the library interacts with the framework.
5.6.23.4.1 Hardware Abstraction Model
This library provides the low-level abstraction of the SQI module on the Microchip family of microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in the software and introduces the library interface.
Description
Before jumping into the software abstraction, it is important to understand the SQI hardware a little more in detail.
Figure 2 provides a glimpse of SQI hardware block diagram. As shown the diagram the features of SQI are divided into multiple
logic blocks and the SQI peripheral library provides APIs to configure the various logic block thus the features.
The control and status SFRs block contains all the registers that are used to configure the SQI in a specific mode of operation.
The PIO mode of operation of SQI requires a set of registers to be configured by the Host processor and writing to/ reading from
the TXDATA and RXDATA registers. The XIP logic facilitates the SQI modules eXecute-In-Place mode of operation, where Host
processor programs the set of registers that configure the XIP mode and the engine automatically reads the external flash and
the read data gets mapped into a direct memory region. Where as DMA mode requires the Host processor to program a set of
buffer descriptors and instructs SQI to point to the address of those buffer descriptors for the reads and writes. As mentioned
earlier there are 3 buffers; transmit, receive and control that are accessed through SQIxTXDATA, SQIxRXDATA adn SQIxCON
registers respectively.
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Figure 2: SQI Hardware Block Diagram
The SQI Peripheral Library takes requests from application software or the SQI device driver and controls the SQI hardware as
per the inputs passed to the Library Interface Figure 3 provides the SQI peripheral library software abstraction layer diagram.
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Figure 3: SQI Software Abstraction Model
The major components are SQI Peripheral Library are:
• Configuration Management
• Interrupt Control and Status Management
• DMA Mode Management
5.6.23.4.2 Library Usage Model
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the SQI module.
Library Interface Section Description
Mode Configuration Management Functions These functions are used to setup transfer mode (DMA/XIP/PIO), data
mode (SPI Mode 0/Mode 3/ Serial Flash), lane mode (single/dual/quad)
and XIP control registers.
Clock Configuration Management Functions These functions are used to enable the clock, setup a clock divider and
check the status of the clock to see if it's stable.
XIP Configuration Management Functions These functions are used to setup parameters for XIP mode of operation.
PIO Mode Transfer Management Functions These functions are used to setup TXDATA, RXDATA registers and status
checks.
Interrupt Control and Status Management
Functions
These functions are used to control the interrupts. SQI supports only status
type of interrupts (no error interrupts).
DMA Buffer Address Management Functions These functions are used to setup the address of the base descriptor,
check the address of the current descriptor
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DMA Buffer Descriptor Management Functions These functions are used to setup and control 4 words (BD_CTRL,
BD_STATUS (reserved), BD_BUF_ADDR and BD_NEXT_PTR)
DMA Control and Status Management Functions These functions are used to control the buffer descriptor fetch process and
check the status during the buffer descriptor fetches.
5.6.23.4.3 How the Library Works
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes.
5.6.23.4.3.1 Core Functionality
SQI modules core functionality is to transfer data between the serial device (mostly quad flash) attached and the PIC
microcontroller. In order to achieve this, SQI module uses 3 transfer modes: DMA, PIO and XIP. Each transfer mode can be
configured to use any of the 3 available data flow modes (Mode 0, Mode 3 and Serial Flash Mode) to achieve the transfers. DMA
and PIO modes are typically used to transfer data and XIP mode is used for code execution.
Each mode of operation requires setting-up the clock, selecting data flow mode and selecting lane mode and other parameters
as required by the device driver or application. SQI peripheral library includes complete set of API necessary to perform these
operations.
The following sections describe the SQI core functionality in each mode of operation.
5.6.23.4.3.1.1 XIP Mode
XIP (eXecute-In-Place) mode is mostly used to execute the code out of the attached serial flash device. However, this mode can
also be used to transfer data as deemed necessary. In order for SQI to operate in XIP mode, host processor would have to setup
the two SFRs dedicated to the XIP mode in addition to SQI configuration and clock control SFRs. Please refer to the specific
data sheet and family reference manual for the configuration details.
Please note that all the XIP configuration values depend on the parameters of the interfaced serial flash memory device. In XIP
mode, reading values of any other SFRs return the contents of the serial flash device, the way it is mapped.
Figure 4 provides the XIP mode software flow.
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Figure 4: XIP Mode Flow Diagram
Example:
// Example is written to access SST26VF032 flash device
// Example assumes the Flash Device is connected to Chip Select 0
//Global defines
#define SST26VF_HS_READ 0x0B
#define SST26VF_MODE_CODE 0x0
#define SST26VF_MODE_BYTES 0x0
// Setup SQI Configuration Bits
PLIB_SQI_Enable(SQI_ID_1);
PLIB_SQI_CSOutputEnableSelect(SQI_ID_1, SQI_CS_OEN_0);
PLIB_SQI_DataOutputEnableSelect(SQI_ID_1, SQI_DATA_OEN_QUAD);
// Disable All Interrupts
PLIB_SQI_InterruptDisable(SQI_ID_1, SQI_ALL_INT);
PLIB_SQI_InterruptSignalDisable(SQI_ID_1, SQI_ALL_INT);
// Setup SQI Transfer Clock
PLIB_SQI_ClockDividerSet(SQI_ID_1,CLK_DIV_1);
PLIB_SQI_ClockEnable(SQI_ID_1);
while (!PLIB_SQI_ClockIsStable(SQI_ID_1));
// Configure XIP Control 1 SFR
PLIB_SQI_XIPControlWord1Set (SQI_ID_1,
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SQI_LANE_QUAD,
SQI_LANE_QUAD,
SQI_LANE_QUAD,
SQI_LANE_QUAD,
SQI_LANE_QUAD,
SST26VF_HS_READ,
ADDR_BYTES_3,
DUMMY_BYTES_2
);
// Configure XIP Control 2 SFR
PLIB_SQI_XIPControlWord2Set (SQI_ID_1,
SST26VF_MODE_CODE,
MODE_BYTES_0,
SQI_CS_0
);
// Set Transfer Mode to XIP
PLIB_SQI_TransferModeSet(SQI_ID_1, SQI_XFER_MODE_XIP);
// The SQI is now in XIP mode and should start fetching the code
5.6.23.4.3.1.2 DMA Mode
DMA mode is used for higher throughput data transfers. In DMA mode, the SQI DMA engine controls the data transfers
off-loading the host processor. However, the host processor would have to configure the buffer descriptor and some SQI control
SFRs to initiate the the DMA process. Once the transactions are in progress, the DMA will be in control and the host processor
can get the control through the interrupts or by disabling the DMA.
Figure 5 provides the DMA mode software flow.
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Note 1: Buffer descriptor is a data structure in memory containing 4 words
(BD_CTRL, BD_STAT, BD_BUFADDR and BD_NXTPTR).
Note 2: Base address register points to first buffer descriptor in the chain.
Figure 5: DMA Mode Flow Diagram
Example:
// Example is written to access SST26VF032 flash device
// Example assumes the Flash Device is connected to Chip Select 0
//Global defines
#define SST26VF_EQIO 0x38
#define SST26VF_HS_READ 0x0B
#define SST26VF_MODE_CODE 0x0
#define SST26VF_MODE_BYTES 0x0
#define NUMBER_OF_BDs 5
#define POLL_CON_VALUE 10
{
// Setup the Buffer Descriptors
for ( i=0; i <(NUMBER_OF_BDs-1); i++)
{
// Setup Buffer Descriptors. Handle structures as application
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// needs.
// Configure SQI Control Fields
PLIB_SQI_Enable(SQI_ID_1);
PLIB_SQI_CSOutputEnableSelect(SQI_ID_1,SQI_CS_OEN_0);
PLIB_SQI_DataOutputEnableSelect(SQI_ID_1,SQI_DATA_OEN_2);
PLIB_SQI_BurstEnable(SQI_ID_1);
PLIB_SQI_SerialModeSet(SQI_ID_1);
PLIB_SQI_TransferModeSet(SQI_ID_1,SQI_XFER_MODE_PIO);
// Configure the SQI Transfer Clock
PLIB_SQI_ClockDividerSet(SQI_ID_1,CLK_DIV_4);
PLIB_SQI_ClockEnable(SQI_ID_1);
while (!PLIB_SQI_ClockIsStable(SQI_ID_1));
//Enable Buffer Descriptor Done and Packet Done Interrupts
PLIB_SQI_InterruptEnable(SQI_ID_1,BDDONE);
PLIB_SQI_InterruptSignalEnable(SQI_ID_1,BDDONE);
PLIB_SQI_InterruptEnable(SQI_ID_1,PKTCOMP);
PLIB_SQI_InterruptSignalEnable(SQI_ID_1,PKTCOMP);
// Send EQIO(0x38) Command to SST26VF032 to Enable Quad Lane Mode
// Note: These steps are not in the flow as these are specific to
// one Flash Device (SST26VF032)
PLIB_SQI_ChipSelectSet(SQI_ID_1,SQI_CS_0);
PLIB_SQI_LaneModeSet(SQI_ID_1,SQI_SINGLE_LANE);
PLIB_SQI_TransferCommandSet(SQI_ID_1,SQI_CMD_TRANSMIT);
// Transfers 1 Command Byte, No Address/Dummy Bytes
PLIB_SQI_TransferCountSet(SQI_ID_1, 0x1);
PLIB_SQI_TransmitterDataSend(SQI_ID_1, SST26VF_EQIO);
// Set the SQI in DMA Mode
PLIB_SQI_TransferModeSet(SQI_ID_1,SQI_XFER_MODE_DMA);
// Setup the Base Buffer Descriptor Address
if (!PLIB_SQI_DMAIsActive(SQI_ID_1))
PLIB_SQI_DMABDBaseAddressSet(SQI_ID_1, (void *) (&MY_BASE_BD_STRUCT));
//Setup DMA Control Register
PLIB_SQI_DMABDEnable(SQI_ID_1);
PLIB_SQI_DMABDPollEnable(SQI_ID_1);
// Setup DMA Polling
If (PLIB_SQI_DMABDPollIsEnabled(SQI_ID_1))
// Poll DMA every 10 cycles
PLIB_SQI_PollControlSet(SQI_ID_1, MY_POLL_CONTROL_VALUE);
// Start the DMA Process - DMA Engine is now in Control
If (PLIB_SQI_DMAIsEnabled(SQI_ID_1))
{
if (!PLIB_SQI_DMAIsActive(MY_SQI_INSTANCE))
PLIB_SQI_DMABDFetchStart(SQI_ID_1);
}
}
5.6.23.4.3.1.3 PIO Mode
PIO mode is mostly used for data transfers. In PIO mode, the SQI module is entirely under the control of host processor. For the
SQI module to operate in PIO mode, the host processor would have to set up the configuration, control, and clock control SFRs.
Once the transactions are in progress, the host processor can use interrupts and status flags to control the operation. Please
refer to the specific device data sheet and family reference manual for the configuration details.
Figure 6 provides the PIO mode software flow.
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b
Figure 6: PIO Mode Flow Diagram
Example:
// Example is written to access SST26VF032 flash device
// Example assumes the Flash Device is connected to Chip Select 0
// Example reads the device ID of the SST26VF032
//Global defines
#define FALSE 0
#define TRUE 1
#define SST26VF_EQIO 0x38
#define SST26VF_HS_READ 0x0B
#define SST26VF_QJEDID_READ 0x9F
#define SST26VF_JEDEC_ID 0xBF2602
{
int32_t jedecID;
// Setup SQI Configuration (SQI1CFG) Register
PLIB_SQI_ConfigWordSet(MY_SQI_INSTANCE,
1,
SQI_CS_OEN_0,
SQI_DATA_OEN_QUAD,
0,
1,
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0,
0,
0,
SQI_DATA_FORMAT_MSBF,
SQI_DATA_MODE_3,
SQI_XFER_MODE_PIO
);
PLIB_SQI_ControlBufferThresholdSet(SQI_ID_1,4);
// Enable Specific Interrupts
PLIB_SQI_InterruptEnable(SQI_ID_1,TXEMPTY|RXFULL/TXTHRIE|RXTHRIE);
// Setup SQI Transfer Clock
PLIB_SQI_ClockDividerSet(SQI_ID_1,CLK_DIV_1);
PLIB_SQI_ClockEnable(SQI_ID_1);
while (!PLIB_SQI_ClockIsStable(SQI_ID_1));
// Setup SQI Transmit Command Threshold
PLIB_SQI_TxCommandThresholdSet(SQI_ID_1,3);
// Setup SQI Receive Buffer Threshold
PLIB_SQI_TxBufferThresholdIntSet(SQI_ID_1,3);
// Configure SQI Control Fields and Send EQIO(0x38) Command to
// SST26VF032 to Enable Quad Lane Mode
PLIB_SQI_ControlWordSet(MY_SQI_INSTANCE,
1,
SQI_CS_1,
SQI_LANE_SINGLE,
SQI_CMD_TRANSMIT,
1
);
PLIB_SQI_ControlWordSet(MY_SQI_INSTANCE,
0,
SQI_CS_1,
SQI_LANE_QUAD,
SQI_CMD_TRANSMIT,
1
);
PLIB_SQI_ControlWordSet(MY_SQI_INSTANCE,
0,
SQI_CS_1,
SQI_LANE_QUAD,
SQI_CMD_RECIEVE,
3
);
if ( PLIB_SQI_InterruptFlagGet(SQI_ID_1,TXEMPTY) )
PLIB_SQI_TransmitData(SQI_ID_1, SST26VF_EQIO);
//Configure SQI to read JEDEC-ID in Quad Mode
if ( PLIB_SQI_InterruptFlagGet(SQI_ID_1,TXEMPTY) )
PLIB_SQI_TransmitData(SQI_ID_1, SST26VF_QJEDID_READ);
if (PLIB_SQI_InterruptFlagGet(SQI_ID_1,RXFULL))
jedecID = PLIB_SQI_ReceiveData(SQI_ID_1);
if (jedecID == SST26VF_JEDEC_ID)
return TRUE;
else
return FALSE;
}
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5.6.23.4.4 Configuring the Library
The library is configured for the supported processor when the processor is chosen in the MPLAB IDE.
5.6.23.5 Library Interface
Data Types and Constants
Name Description
SQI_ADDR_BYTES Defines the list of SQI Address Bytes
SQI_BD_CTRL_WORD Defines the list of SQI Buffer Descriptor Control Word
SQI_BD_STATE Defines the list of SQI Buffer Descriptor State
SQI_CLK_DIV Defines the list of SQI Clock Divider Values
SQI_CS_NUM Defines the list of SQI Chip Selects
SQI_CS_OEN Defines the list of SQI Chip Selects on which output is enabled
SQI_DATA_FORMAT Defines the Data Format Options available (LSBF/MSBF)
SQI_DATA_MODE Defines the list of SQI Data Modes
SQI_DATA_OEN Defines the list of SQI Data pins on which output is enabled
SQI_DATA_TYPE Data type defining the SQI Data size.
SQI_DUMMY_BYTES Defines the list of SQI Dummy Bytes
SQI_INTERRUPTS Defines the list of SQI Interrupts
SQI_LANE_MODE Defines the list of SQI Lane Modes (single/dual/quad)
SQI_MODE_BYTES Defines the list of SQI Mode Bytes
SQI_MODULE_ID Identifies the SQI modules supported
SQI_XFER_CMD Defines the list of SQI Transfer Commands
SQI_XFER_MODE Defines the list of SQI Transfer Modes
Clock Configuration Management Functions
Name Description
PLIB_SQI_ClockDividerGet Returns the SQI clock divider value.
PLIB_SQI_ClockDividerSet Sets the SQI clock (that drives the SQI protocol) divider value. Divides the base
clock to generate the SQI clock.
PLIB_SQI_ClockEnable Enables the SQI transfer clock.
PLIB_SQI_ClockIsStable Returns SQI transfer clock state.
DMA Buffer Address Management Functions
Name Description
PLIB_SQI_DMABDBaseAddressGet Returns the address of the base buffer descriptor.
PLIB_SQI_DMABDBaseAddressSet Sets the address of the base buffer descriptor.
PLIB_SQI_DMABDCurrentAddressGet Returns the address of the current buffer descriptor in process.
DMA Buffer Descriptor Management Functions
Name Description
PLIB_SQI_DMABDControlWordGet Returns Current Buffer Descriptor Control Word Information.
PLIB_SQI_DMABDReceiveBufferCountGet Returns the receive buffer space in bytes.
PLIB_SQI_DMABDReceiveBufferLengthGet Returns the receive length in bytes.
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PLIB_SQI_DMABDReceiveStateGet Returns the current state of the buffer descriptor in progress.
PLIB_SQI_DMABDTransmitBufferCountGet Returns the transmit buffer space in bytes.
PLIB_SQI_DMABDTransmitBufferLengthGet Returns the transmit length in bytes.
PLIB_SQI_DMABDTransmitStateGet Returns the current state of the buffer descriptor in progress.
DMA Control and Status Management Functions
Name Description
PLIB_SQI_DMABDFetchStart Start the DMA buffer descriptor fetch process.
PLIB_SQI_DMABDIsBusy Returns true if DMA Buffer Descriptor is busy.
PLIB_SQI_DMABDPollCounterSet Sets the poll counter value.
PLIB_SQI_DMABDPollDisable Disables the buffer descriptor polling.
PLIB_SQI_DMABDPollEnable Enables the buffer descriptor polling.
PLIB_SQI_DMABDPollIsEnabled Returns true if DAM buffer descriptor poll is eanbled and false if it's disabled.
PLIB_SQI_DMABDStateGet Returns the current state of the buffer descriptor in progress.
PLIB_SQI_DMADisable Disables the built-in DMA logic.
PLIB_SQI_DMAEnable Enables the built-in DMA logic.
PLIB_SQI_DMAHasStarted Returns true if DMA process has started if not returns false.
PLIB_SQI_DMAIsEnabled Returns true if DAM is eanbled and false if it's disabled.
Feature Existence Functions
Name Description
PLIB_SQI_ExistsBDBaseAddress Identifies whether the BDBaseAddress feature exists on the SQI
module
PLIB_SQI_ExistsBDControlWord Identifies whether the BDControlWord feature exists on the SQI
module
PLIB_SQI_ExistsBDCurrentAddress Identifies whether the BDCurrentAddress feature exists on the SQI
module
PLIB_SQI_ExistsBDPollCount Identifies whether the BDPollCount feature exists on the SQI module
PLIB_SQI_ExistsBDPollingEnable Identifies whether the BDPollingEnable feature exists on the SQI
module
PLIB_SQI_ExistsBDProcessState Identifies whether the BDProcessState feature exists on the SQI
module
PLIB_SQI_ExistsBDRxBufCount Identifies whether the BDRxBufCount feature exists on the SQI
module
PLIB_SQI_ExistsBDRxLength Identifies whether the BDRxLength feature exists on the SQI module
PLIB_SQI_ExistsBDRxState Identifies whether the BDRxState feature exists on the SQI module
PLIB_SQI_ExistsBDTxBufCount Identifies whether the BDTxBufCount feature exists on the SQI
module
PLIB_SQI_ExistsBDTxLength Identifies whether the BDTxLength feature exists on the SQI module
PLIB_SQI_ExistsBDTxState Identifies whether the BDTxState feature exists on the SQI module
PLIB_SQI_ExistsBurstControl Identifies whether the BurstControl feature exists on the SQI module
PLIB_SQI_ExistsChipSelect Identifies whether the ChipSelect feature exists on the SQI module
PLIB_SQI_ExistsClockControl Identifies whether the ClockControl feature exists on the SQI module
PLIB_SQI_ExistsClockDivider Identifies whether the ClockDivider feature exists on the SQI module
PLIB_SQI_ExistsClockReady Identifies whether the ClockReady feature exists on the SQI module
PLIB_SQI_ExistsConBufThreshold Identifies whether the ConBufThreshold feature exists on the SQI
module
PLIB_SQI_ExistsConfigWord Identifies whether the ConfigWord feature exists on the SQI module
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PLIB_SQI_ExistsControlWord Identifies whether the ControlWord feature exists on the SQI module
PLIB_SQI_ExistsCSDeassert Identifies whether the CSDeassert feature exists on the SQI module
PLIB_SQI_ExistsCSOutputEnable Identifies whether the CSOutputEnable feature exists on the SQI
module
PLIB_SQI_ExistsDataFormat Identifies whether the DataFormat feature exists on the SQI module
PLIB_SQI_ExistsDataModeControl Identifies whether the DataModeControl feature exists on the SQI
module
PLIB_SQI_ExistsDataOutputEnable Identifies whether the DataOutputEnable feature exists on the SQI
module
PLIB_SQI_ExistsDataPinStatus Identifies whether the DataPinStatus feature exists on the SQI
module
PLIB_SQI_ExistsDmaEnable Identifies whether the DMAEnable feature exists on the SQI module
PLIB_SQI_ExistsDMAEngineBusy Identifies whether the DMAEngineBusy feature exists on the SQI
module
PLIB_SQI_ExistsDMAProcessInProgress Identifies whether the DMAProcessInProgress feature exists on the
SQI module
PLIB_SQI_ExistsEnableControl Identifies whether the EnableControl feature exists on the SQI
module
PLIB_SQI_ExistsHoldPinControl Identifies whether the HoldPinControl feature exists on the SQI
module
PLIB_SQI_ExistsInterruptControl Identifies whether the InterruptControl feature exists on the SQI
module
PLIB_SQI_ExistsInterruptSignalControl Identifies whether the InterruptSignalControl feature exists on the
SQI module
PLIB_SQI_ExistsInterruptStatus Identifies whether the InterruptStatus feature exists on the SQI
module
PLIB_SQI_ExistsLaneMode Identifies whether the LaneMode feature exists on the SQI module
PLIB_SQI_ExistsReceiveLatch Identifies whether the ReceiveLatch feature exists on the SQI
module
PLIB_SQI_ExistsRxBufferCount Identifies whether the RxBufferCount feature exists on the SQI
module
PLIB_SQI_ExistsRxBufIntThreshold Identifies whether the RxBufIntThreshold feature exists on the SQI
module
PLIB_SQI_ExistsRxBufThreshold Identifies whether the RxBufThreshold feature exists on the SQI
module
PLIB_SQI_ExistsRxData Identifies whether the RxData feature exists on the SQI module
PLIB_SQI_ExistsRxUnderRun Identifies whether the RxUnderRun feature exists on the SQI module
PLIB_SQI_ExistsSoftReset Identifies whether the SoftReset feature exists on the SQI module
PLIB_SQI_ExistsStartDMA Identifies whether the StartDMA feature exists on the SQI module
PLIB_SQI_ExistsTransferCommand Identifies whether the TransferCommand feature exists on the SQI
module
PLIB_SQI_ExistsTransferCount Identifies whether the TransferCount feature exists on the SQI
module
PLIB_SQI_ExistsTransferModeControl Identifies whether the TransferModeControl feature exists on the
SQI module
PLIB_SQI_ExistsTxBufferFree Identifies whether the TxBufferFree feature exists on the SQI module
PLIB_SQI_ExistsTxBufIntThreshold Identifies whether the TxBufIntThreshold feature exists on the SQI
module
PLIB_SQI_ExistsTxBufThreshold Identifies whether the TxBufThreshold feature exists on the SQI
module
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PLIB_SQI_ExistsTxData Identifies whether the TxData feature exists on the SQI module
PLIB_SQI_ExistsTxOverFlow Identifies whether the TxOverFlow feature exists on the SQI module
PLIB_SQI_ExistsWPPinControl Identifies whether the WPPinControl feature exists on the SQI
module
PLIB_SQI_ExistsXIPChipSelect Identifies whether the XIPChipSelect feature exists on the SQI
module
PLIB_SQI_ExistsXIPControlWord1 Identifies whether the XIPControlWord1 feature exists on the SQI
module
PLIB_SQI_ExistsXIPControlWord2 Identifies whether the XIPControlWord2 feature exists on the SQI
module
PLIB_SQI_ExistsXIPLaneMode Identifies whether the XIPLaneMode feature exists on the SQI
module
PLIB_SQI_ExistsXIPModeBytes Identifies whether the XIPModeBytes feature exists on the SQI
module
PLIB_SQI_ExistsXIPModeCode Identifies whether the XIPModeCode feature exists on the SQI
module
PLIB_SQI_ExistsXIPNumberOfAddressBytes Identifies whether the XIPNumberOfAddressBytes feature exists on
the SQI module
PLIB_SQI_ExistsXIPNumberOfDummyBytes Identifies whether the XIPNumberOfDummyBytes feature exists on
the SQI module
PLIB_SQI_ExistsXIPReadOpCode Identifies whether the XIPReadOpCode feature exists on the SQI
module
Interrupt Control and Status Management Functions
Name Description
PLIB_SQI_DataLineStatus Returns the logical status of the SQI data lines.
PLIB_SQI_InterruptDisable Disables the interrupt source.
PLIB_SQI_InterruptEnable Enables the interrupt source passed.
PLIB_SQI_InterruptFlagGet Return SQI Interrupt flag status.
PLIB_SQI_InterruptIsEnabled Returns the interrupt state (eanbled/disabled).
PLIB_SQI_InterruptSignalDisable Disables the interrupt signal source.
PLIB_SQI_InterruptSignalEnable Enables the interrupt signal source passed.
PLIB_SQI_InterruptSignalIsEnabled Returns the interrupt signal state (eanbled/disabled).
Mode Configuration Management Functions
Name Description
PLIB_SQI_BurstEnable This bit sets the burst enable (BURSTEN) function for higher
throughput. This function is artifact of the system bus architecture.
PLIB_SQI_ClockDisable Disables the SQI transfer clock.
PLIB_SQI_ControlBufferThresholdGet Returns the transmit buffer space in bytes.
PLIB_SQI_ControlBufferThresholdSet Sets the control buffer threshold value.
PLIB_SQI_ControlWordGet Get the SQI control word.
PLIB_SQI_ControlWordSet Sets SQI Control Word.
PLIB_SQI_CSOutputEnableSelect Selects the output enables on SQI chip select pins.
PLIB_SQI_DataFormatGet Returns the data format to Least Significant Bit First or
LITTLE-ENDIAN.
PLIB_SQI_DataFormatSet Sets the data format to Least Significant Bit First or LITTLE-ENDIAN.
PLIB_SQI_DataModeGet Returns the SQI data mode of operation (SPI Mode0/Mode3).
PLIB_SQI_DataModeSet Sets the SQI data mode of operation (SPI Mode0/Mode3/Serial Flash).
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PLIB_SQI_DataOutputEnableSelect Selects the output enables on SQI data outputs.
PLIB_SQI_Disable Disables the SQI module.
PLIB_SQI_Enable Enables the SQI module.
PLIB_SQI_HoldClear This bit clears the hold function to be disabled on SQID3 in single and
dual lane modes.
PLIB_SQI_HoldGet This bit gets the status of HOLD function on SQID3 pin.
PLIB_SQI_HoldSet This bit sets the hold function to be enabled on SQID3 in single or dual
lane modes.
PLIB_SQI_LaneModeGet Returns the lane mode (single/dual/quad).
PLIB_SQI_LaneModeSet Sets the data lane mode (single/dual/quad).
PLIB_SQI_NumberOfReceiveBufferReads Returns the number of receive buffer reads.
PLIB_SQI_ReceiveData Reads the data from the receive buffer.
PLIB_SQI_ReceiveLatchDisable Disables the receive latch so receive data is discarded when in transmit
mode.
PLIB_SQI_ReceiveLatchEnable Enable the receive latch so receive data is latched during transmit
mode.
PLIB_SQI_ReceiveLatchGet Returns the receive latch status in transmit mode.
PLIB_SQI_SoftReset This bit issues a soft reset to the SQI module.
PLIB_SQI_TransferModeGet Returns the SQI transfer mode (PIO/DMA/XIP) of operation.
PLIB_SQI_TransferModeSet Sets the SQI transfer mode (PIO/DMA/XIP) of operation.
PLIB_SQI_TransmitData Writes data into the SQI transmit buffer.
PLIB_SQI_WriteProtectClear This bit clears the Write-Protect function to be disabled on SQID2 in
single or dual lane modes.
PLIB_SQI_WriteProtectGet This bit gets the Write-Protect state of Write_Protect Feature on SQID2.
PLIB_SQI_WriteProtectSet This bit sets the Write-Protect function to be enabled on SQID2 in
single or dual Lane modes only.
PIO Mode Transfer Management Functions
Name Description
PLIB_SQI_ByteCountGet Returns the current transmit/receive count.
PLIB_SQI_ByteCountSet Sets the transmit/receive count.
PLIB_SQI_ChipSelectDeassertDisable Clears the chip select de-assert.
PLIB_SQI_ChipSelectDeassertEnable Sets the chip select de-assert.
PLIB_SQI_ChipSelectGet Returns the chip select that is currently active.
PLIB_SQI_ChipSelectSet Activates the chip select.
PLIB_SQI_ConfigWordGet Get the SQI configuration word.
PLIB_SQI_ConfigWordSet Sets SQI Configuration Word.
PLIB_SQI_ReceiveBufferIsUnderrun Returns the status of receive buffer.
PLIB_SQI_RxBufferThresholdGet Returns the receive command threshold.
PLIB_SQI_RxBufferThresholdIntGet Sets the receive buffer threshold interrupt.
PLIB_SQI_RxBufferThresholdIntSet Sets the receive buffer threshold for interrupt.
PLIB_SQI_RxBufferThresholdSet Sets the receive command threshold.
PLIB_SQI_TransferDirectionGet Returns the transfer command.
PLIB_SQI_TransferDirectionSet Sets the transfer command.
PLIB_SQI_TransmitBufferFreeSpaceGet Returns the number of transmit buffer words available.
PLIB_SQI_TransmitBufferHasOverflowed Returns the current status of the transmit buffer.
PLIB_SQI_TxBufferThresholdGet Returns the transmit command threshold value.
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PLIB_SQI_TxBufferThresholdIntGet Returns the value to tigger the transmit buffer threshold interrupt.
PLIB_SQI_TxBufferThresholdIntSet Sets the value to tigger the transmit buffer threshold interrupt.
PLIB_SQI_TxBufferThresholdSet Sets the transmit command threshold.
XIP Configuration Management Functions
Name Description
PLIB_SQI_XIPAddressBytesGet Returns the number of address bytes.
PLIB_SQI_XIPAddressBytesSet Sets the number of address bytes.
PLIB_SQI_XIPChipSelectGet Returns the current active chip select.
PLIB_SQI_XIPChipSelectSet Activates the chip select in XIP mode.
PLIB_SQI_XIPControlWord1Get Get the XIP mode control word 1.
PLIB_SQI_XIPControlWord1Set Sets the XIP mode control word 1.
PLIB_SQI_XIPControlWord2Get Get the XIP mode control word 2.
PLIB_SQI_XIPControlWord2Set Sets the XIP mode control word 2.
PLIB_SQI_XIPDummyBytesGet Sets the number of dummy bytes.
PLIB_SQI_XIPDummyBytesSet Sets the number of dummy bytes.
PLIB_SQI_XIPLaneModeGet Returns the lane (single/dual/quad) mode in XIP mode.
PLIB_SQI_XIPLaneModeSet Selects the lane (Single/Dual/Quad) mode for different transaction in XIP mode.
PLIB_SQI_XIPModeBytesGet Returns the number of bytes used for mode code command.
PLIB_SQI_XIPModeBytesSet Allocates the bytes for mode code command.
PLIB_SQI_XIPModeCodeGet Returns the mode code op-code.
PLIB_SQI_XIPModeCodeSet Sets the mode code command.
PLIB_SQI_XIPReadOpcodeGet Returns the read opcode in XIP mode.
PLIB_SQI_XIPReadOpcodeSet Sets the read opcode in XIP mode.
Description
This section describes the Application Programming Interface (API) functions of the SQI Peripheral Library. Refer to each section
for a detailed description.
5.6.23.5.1 Mode Configuration Management Functions
5.6.23.5.1.1 PLIB_SQI_BurstEnable Function
C
void PLIB_SQI_BurstEnable(
SQI_MODULE_ID index
);
Description
This routine enables burst mode for higher throughput. Burst mode should always be enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_BurstEnable(MY_SQI_INSTANCE);
5.6.23.5.1.2 PLIB_SQI_ClockDisable Function
C
void PLIB_SQI_ClockDisable(
SQI_MODULE_ID index
);
Description
This routine disables the SQI transfer clock (divided clock).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
SQICLK is disabled.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_ClockDisable(MY_SQI_INSTANCE);
5.6.23.5.1.3 PLIB_SQI_ControlBufferThresholdGet Function
C
uint8_t PLIB_SQI_ControlBufferThresholdGet(
SQI_MODULE_ID index
);
Description
This routine returns the threshold value for the control buffer in bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
Control buffer threshold space.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t conBufThres = PLIB_SQI_ControlBufferThresholdGet(MY_SQI_INSTANCE);
5.6.23.5.1.4 PLIB_SQI_ControlBufferThresholdSet Function
C
void PLIB_SQI_ControlBufferThresholdSet(
SQI_MODULE_ID index,
uint8_t threshold
);
Description
This routine sets the control buffer threshold value in bytes, that is used to signal control buffer threshold interrupts.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
threshold Control buffer threshold
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and MY_CONBUF_THRESHOLD is the threshold value.
PLIB_SQI_ControlBufferThresholdSet(MY_SQI_INSTANCE, MY_CONBUF_THRESHOLD);
5.6.23.5.1.5 PLIB_SQI_ControlWordGet Function
C
uint32_t PLIB_SQI_ControlWordGet(
SQI_MODULE_ID index
);
Description
This routine returns the SQI control word.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint32_t sqiCon = PLIB_SQI_ControlWordGet (MY_SQI_INSTANCE);
5.6.23.5.1.6 PLIB_SQI_ControlWordSet Function
C
void PLIB_SQI_ControlWordSet(
SQI_MODULE_ID index,
bool csDeassert,
SQI_CS_NUM csNum,
SQI_LANE_MODE laneMode,
SQI_XFER_CMD command,
uint16_t xferCount
);
Description
This routine sets SQI Control Word. This API is cumulation of multiple APIs, in case driver plans to write the complete control
word. In PIO Mode Control word is before each transfer
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
csDeassert Chip select deassert after transfer
csNum Active chip select number (0/1)
laneMode SQI lane mode (QUAL/DUAL/SINGLE)
command Transfer command (TRANSMIT/RECIEVE/IDLE)
xferCount Number of bytes to be transmitted/received
Returns
None.
Remarks
Chip select is not actually asserted, only enabled to be asserted.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_ControlWordSet(MY_SQI_INSTANCE,
1,
SQI_CS_1,
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SQI_LANE_QUAD,
SQI_CMD_TRANSMIT,
5
);
5.6.23.5.1.7 PLIB_SQI_CSOutputEnableSelect Function
C
void PLIB_SQI_CSOutputEnableSelect(
SQI_MODULE_ID index,
SQI_CS_OEN csPins
);
Description
This routine enables the selected SQI chip selects as outputs.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
csPins Chip select pins for which outputs are enabled
Returns
None.
Remarks
Chip select is not actually asserted, only enabled to be asserted.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_CSOutputEnableSelect(MY_SQI_INSTANCE, SQI_CS_OEN_0);
5.6.23.5.1.8 PLIB_SQI_DataFormatGet Function
C
SQI_DATA_FORMAT PLIB_SQI_DataFormatGet(
SQI_MODULE_ID index
);
Description
This routine returns the SQI data format (LSBF/MSBF).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
True if Data Format is LSBF, else flase.
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Remarks
Typical data format in most of the Systems is LITTLE ENDIAN.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
SQI_DATA_FORMAT dataFormat = PLIB_SQI_DataFormatGet(MY_SQI_INSTANCE);
5.6.23.5.1.9 PLIB_SQI_DataFormatSet Function
C
void PLIB_SQI_DataFormatSet(
SQI_MODULE_ID index,
SQI_DATA_FORMAT dataformat
);
Description
This routine sets the SQI data format to LSBF (LITTLE-ENDIAN).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Typical data format in most of the Systems is LITTLE ENDIAN.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_DataFormatSet(MY_SQI_INSTANCE, SQI_DATA_FORMAT_LSBF);
5.6.23.5.1.10 PLIB_SQI_DataModeGet Function
C
SQI_DATA_MODE PLIB_SQI_DataModeGet(
SQI_MODULE_ID index
);
Description
This routine returns the SQI data mode (SPI Mode 0/Mode 3) of operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
Data mode (SPI Mode 0/Mode 3).
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
SQI_DATA_MODE dataMode = PLIB_SQI_DataModeGet(MY_SQI_INSTANCE);
5.6.23.5.1.11 PLIB_SQI_DataModeSet Function
C
void PLIB_SQI_DataModeSet(
SQI_MODULE_ID index,
SQI_DATA_MODE mode
);
Description
This routine sets the data mode to be SPI Mode 0, SPI Mode 3 or Serial Flash.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode Data mode (Mode 0/ Mode 3)
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and SQI_DATA_MODE_3 is an enum element.
PLIB_SQI_DataModeSet(MY_SQI_INSTANCE, SQI_DATA_MODE_SF);
5.6.23.5.1.12 PLIB_SQI_DataOutputEnableSelect Function
C
void PLIB_SQI_DataOutputEnableSelect(
SQI_MODULE_ID index,
SQI_DATA_OEN dataPins
);
Description
This routine enables the selected SQI data lines as outputs.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
dataPins Data pins for which outputs are enabled
Returns
None.
Remarks
Chip select is not actually asserted, only enabled to be asserted.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_DataOutputEnableSelect(MY_SQI_INSTANCE, SQI_DATA_OEN_DUAL);
5.6.23.5.1.13 PLIB_SQI_Disable Function
C
void PLIB_SQI_Disable(
SQI_MODULE_ID index
);
Description
This routine disables the SQI module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_Disable(MY_SQI_INSTANCE);
5.6.23.5.1.14 PLIB_SQI_Enable Function
C
void PLIB_SQI_Enable(
SQI_MODULE_ID index
);
Description
This routine enables the SQI module.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
The SQICLK, SQICSx, SQID0, SQID1, SQID2 and SQID3 pins must be assigned to available RPn pins before use.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_Enable(MY_SQI_INSTANCE);
5.6.23.5.1.15 PLIB_SQI_HoldClear Function
C
void PLIB_SQI_HoldClear(
SQI_MODULE_ID index
);
Description
This routine sets SQID3 to be controlled by SQI for normal data operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_HoldClear(MY_SQI_INSTANCE);
5.6.23.5.1.16 PLIB_SQI_HoldGet Function
C
void PLIB_SQI_HoldGet(
SQI_MODULE_ID index
);
Description
This routine gets the status of HOLD function on SQID3 pin.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
bool holdStatus = PLIB_SQI_HoldGet(MY_SQI_INSTANCE);
5.6.23.5.1.17 PLIB_SQI_HoldSet Function
C
void PLIB_SQI_HoldSet(
SQI_MODULE_ID index
);
Description
This routine sets the SQID3 pin to HIGH/LOW to be be used for hold function in single and dual lane modes for supported flash
memories.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function should be used only when SQI is in single/dual lane modes.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_HoldSet(MY_SQI_INSTANCE);
5.6.23.5.1.18 PLIB_SQI_LaneModeGet Function
C
SQI_LANE_MODE PLIB_SQI_LaneModeGet(
SQI_MODULE_ID index
);
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5-2917
Description
This routine returns the number of lanes (single/dual/quad) used for tansfers.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Lane Mode.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
SQI_LANE_MODE laneMode = PLIB_SQI_LaneModeGet(MY_SQI_INSTANCE);
5.6.23.5.1.19 PLIB_SQI_LaneModeSet Function
C
void PLIB_SQI_LaneModeSet(
SQI_MODULE_ID index,
SQI_LANE_MODE mode
);
Description
This routine sets the number of lanes (single/dual/quad) used for tansfers.
Preconditions
Make sure the output enable is selected on the data lines (PLIB_SQI_DataOutputEnableSelect). The device needs to be
programmed to the same mode that the SQI controller is set to (might require special commands).
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode Lane mode (single/dual/quad)
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_LaneModeSet(MY_SQI_INSTANCE, SQI_LANE_QUAD);
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5.6.23.5.1.20 PLIB_SQI_NumberOfReceiveBufferReads Function
C
uint8_t PLIB_SQI_NumberOfReceiveBufferReads(
SQI_MODULE_ID index
);
Description
This routine returns the number of receive buffer reads for debug purpose.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Number of Receive Buffer Reads.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t rxBufReads = PLIB_SQI_ReceiveBufferReadsGet(MY_SQI_INSTANCE);
5.6.23.5.1.21 PLIB_SQI_ReceiveData Function
C
uint32_t PLIB_SQI_ReceiveData(
SQI_MODULE_ID index
);
Description
This routine reads the data from the SQI receive buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint32_t receivedData= PLIB_SQI_ReceiveData(MY_SQI_INSTANCE);
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5.6.23.5.1.22 PLIB_SQI_ReceiveLatchDisable Function
C
void PLIB_SQI_ReceiveLatchDisable(
SQI_MODULE_ID index
);
Description
This routine disables the receive latch, which disables the receive data to be latched in transmit mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_ReceiveLatchDisable(MY_SQI_INSTANCE);
5.6.23.5.1.23 PLIB_SQI_ReceiveLatchEnable Function
C
void PLIB_SQI_ReceiveLatchEnable(
SQI_MODULE_ID index
);
Description
This routine enables the receive latch, which latches receive data in transmit mode. Otherwise receive data in transmit mode is
discarded.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
As most of the SQI communication is half-duplex, enable this function only when it's absolutely required.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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PLIB_SQI_ReceiveLatchEnable(MY_SQI_INSTANCE);
5.6.23.5.1.24 PLIB_SQI_ReceiveLatchGet Function
C
bool PLIB_SQI_ReceiveLatchGet(
SQI_MODULE_ID index
);
Description
This routine returns the receive latch status in transmit mode. Returns true, if latch is set (enabling latching of receive buffer
data), false if latch is not set (disabling the latching of the receive buffer data).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
True if Receive latch is set, false if not.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
bool rxLatch = PLIB_SQI_ReceiveLatchGet(MY_SQI_INSTANCE);
5.6.23.5.1.25 PLIB_SQI_SoftReset Function
C
void PLIB_SQI_SoftReset(
SQI_MODULE_ID index
);
Description
This routine issues a software reset to the SQI module clearing all the read/write register, internal state machines and data
buffers.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
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Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_SoftReset(MY_SQI_INSTANCE);
5.6.23.5.1.26 PLIB_SQI_TransferModeGet Function
C
SQI_XFER_MODE PLIB_SQI_TransferModeGet(
SQI_MODULE_ID index
);
Description
This routine returns the SQI transfer mode (PIO/DMA/XIP) of operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured.
Returns
Transfer mode (PIO/DMA/XIP).
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
SQI_XFER_MODE xferMode = PLIB_SQI_TransferModeGet(MY_SQI_INSTANCE);
5.6.23.5.1.27 PLIB_SQI_TransferModeSet Function
C
void PLIB_SQI_TransferModeSet(
SQI_MODULE_ID index,
SQI_XFER_MODE mode
);
Description
This routine sets the SQI transfer mode (PIO/DMA/XIP) of operation.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode Transfer mode (PIO/DMA/XIP)
Returns
None.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and SQI_XFER_MODE_DMA is an enum element.
PLIB_SQI_TransferModeSet(MY_SQI_INSTANCE, SQI_XFER_MODE_DMA);
5.6.23.5.1.28 PLIB_SQI_TransmitData Function
C
void PLIB_SQI_TransmitData(
SQI_MODULE_ID index,
uint32_t data
);
Description
This routine writes the data into the SQI transmit buffer, which will be eventually sent out on SQI bus.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
data Data to be transmitted
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and MY_TRANSMIT_DATA is the data to be sent.
PLIB_SQI_TransmitData(MY_SQI_INSTANCE, MY_TRANSMIT_DATA);
5.6.23.5.1.29 PLIB_SQI_WriteProtectClear Function
C
void PLIB_SQI_WriteProtectClear(
SQI_MODULE_ID index
);
Description
This routine disables the SQID2 pin to be used for write-protect function.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_WriteProtectClear(MY_SQI_INSTANCE);
5.6.23.5.1.30 PLIB_SQI_WriteProtectGet Function
C
bool PLIB_SQI_WriteProtectGet(
SQI_MODULE_ID index
);
Description
This routine gets the Write-Protect feature status on SQID2 pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
bool wpStatus = PLIB_SQI_WriteProtectGet(MY_SQI_INSTANCE);
5.6.23.5.1.31 PLIB_SQI_WriteProtectSet Function
C
void PLIB_SQI_WriteProtectSet(
SQI_MODULE_ID index
);
Description
This routine enables the SQID2 pin to be used for write-protect in single and dual lane modes for supported flash memories.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
None.
Remarks
This function should be used only when SQI is in single/dual lane modes.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_WriteProtectSet (MY_SQI_INSTANCE);
5.6.23.5.2 Clock Configuration Management Functions
5.6.23.5.2.1 PLIB_SQI_ClockDividerGet Function
C
SQI_CLK_DIV PLIB_SQI_ClockDividerGet(
SQI_MODULE_ID index
);
Description
This routine returns the SQI clock divider value. The returned value in conjuction with the SQI base clock can be used to get the
clock rate of SQI clock.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Clock Divider Value.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
SQI_CLK_DIV clkDiv = PLIB_SQI_ClockDividerGet(MY_SQI_INSTANCE);
5.6.23.5.2.2 PLIB_SQI_ClockDividerSet Function
C
void PLIB_SQI_ClockDividerSet(
SQI_MODULE_ID index,
SQI_CLK_DIV clkDivider
);
Description
This routine sets the SQI clock divider value.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
clkDivider Clock divider value
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_ClockDividerSet(MY_SQI_INSTANCE, CLK_DIV_1);
5.6.23.5.2.3 PLIB_SQI_ClockEnable Function
C
void PLIB_SQI_ClockEnable(
SQI_MODULE_ID index
);
Description
This routine enables the SQI transfer clock (divided clock).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
SQICLK is enabled.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_ClockEnable(MY_SQI_INSTANCE);
5.6.23.5.2.4 PLIB_SQI_ClockIsStable Function
C
bool PLIB_SQI_ClockIsStable(
SQI_MODULE_ID index
);
Description
This routine returns the SQI transfer clock state.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
True if clock is stable and false if it's not.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
bool clockState = PLIB_SQI_ClockIsStable(MY_SQI_INSTANCE);
5.6.23.5.3 XIP Configuration Management Functions
5.6.23.5.3.1 PLIB_SQI_XIPAddressBytesGet Function
C
SQI_ADDR_BYTES PLIB_SQI_XIPAddressBytesGet(
SQI_MODULE_ID index
);
Description
This routine returns the number of address bytes to be sent to the flash.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Number of Address Bytes.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t addressBytes = PLIB_SQI_XIPAddressBytesGet(MY_SQI_INSTANCE);
5.6.23.5.3.2 PLIB_SQI_XIPAddressBytesSet Function
C
void PLIB_SQI_XIPAddressBytesSet(
SQI_MODULE_ID index,
SQI_ADDR_BYTES bytes
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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);
Description
This routine sets the number of address bytes to be sent to the flash. Typical flash address bytes are 3 (24-bit address).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
bytes Number of address bytes
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_XIPAddressBytesSet(MY_SQI_INSTANCE, ADDR_BYTES_3);
5.6.23.5.3.3 PLIB_SQI_XIPChipSelectGet Function
C
SQI_CS_NUM PLIB_SQI_XIPChipSelectGet(
SQI_MODULE_ID index
);
Description
This routine returns the active chip select in XIP mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
SQI_CS_NUM xipCSActive = (PLIB_SQI_XIPChipSelectGet(MY_SQI_INSTANCE);
5.6.23.5.3.4 PLIB_SQI_XIPChipSelectSet Function
C
void PLIB_SQI_XIPChipSelectSet(
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SQI_MODULE_ID index,
SQI_CS_NUM csNum
);
Description
This routine sets the chip select that is active in XIP mode.
Preconditions
Make sure the chip select output enable is selected on the CS lines (PLIB_SQI_CSOutputEnableSelect).
Parameters
Parameters Description
index Identifier for the device instance to be configured
csNum Chip select number
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_XIPChipSelectSet(MY_SQI_INSTANCE, SQI_CS_0);
5.6.23.5.3.5 PLIB_SQI_XIPControlWord1Get Function
C
uint32_t PLIB_SQI_XIPControlWord1Get(
SQI_MODULE_ID index
);
Description
This routine returns the XIP mode control word 1.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint32_t xipCon1 = PLIB_SQI_XIPControlWord1Set (MY_SQI_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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5.6.23.5.3.6 PLIB_SQI_XIPControlWord1Set Function
C
void PLIB_SQI_XIPControlWord1Set(
SQI_MODULE_ID index,
SQI_DUMMY_BYTES dummyBytes,
SQI_ADDR_BYTES addressBytes,
uint8_t readOpcode,
SQI_LANE_MODE dataLaneMode,
SQI_LANE_MODE dummyLaneMode,
SQI_LANE_MODE modeCodeLaneMode,
SQI_LANE_MODE addressLaneMode,
SQI_LANE_MODE cmdLaneMode
);
Description
This routine sets XIP mode control word 1. This routine combines work of multiple PLIB APIs and can be used by the driver
where complete XIP control word 1 is being modified.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
dummyBytes Number of dummy bytes (0-7)
addressBytes Number of address bytes (0-4)
readOpcode Quad flash read opcode (ex: 0x0B)
dataLaneMode Number of SQI data lanes used for sending data bytes
dummyLaneMode Number of SQI data lanes used for sending dummy bytes
modeCodeLaneMode Number of SQI data lanes used for sending mode code
addressLaneMode Number of SQI data lanes used for sending address
cmdLaneMode Number of SQI data lanes used for sending command
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_XIPControlWord1Set (MY_SQI_INSTANCE,
DUMMY_BYTES_2,
ADDR_BYTES_3,
0x0B,
SQI_LANE_QUAD,
SQI_LANE_QUAD,
SQI_LANE_QUAD,
SQI_LANE_QUAD,
SQI_LANE_QUAD,
);
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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5.6.23.5.3.7 PLIB_SQI_XIPControlWord2Get Function
C
uint32_t PLIB_SQI_XIPControlWord2Get(
SQI_MODULE_ID index
);
Description
This routine returns the XIP mode control word 2.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint32_t xipCon2 = PLIB_SQI_XIPControlWord2Set (MY_SQI_INSTANCE);
5.6.23.5.3.8 PLIB_SQI_XIPControlWord2Set Function
C
void PLIB_SQI_XIPControlWord2Set(
SQI_MODULE_ID index,
SQI_CS_NUM devSelect,
SQI_MODE_BYTES modeBytes,
uint8_t modeCode
);
Description
This routine sets XIP mode control word 2. This routine combines work of multiple PLIB APIs and can be used by the driver
where complete XIP control word 2 is being modified.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
modeCode Mode code used for supported flash devices
modeBytes Number of mode code bytes
devSelect Chip select for XIP mode
Returns
None.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_XIPControlWord2Set (MY_SQI_INSTANCE,
SQI_CS_0,
MODE_BYTES_0,
0x0
);
5.6.23.5.3.9 PLIB_SQI_XIPDummyBytesGet Function
C
SQI_DUMMY_BYTES PLIB_SQI_XIPDummyBytesGet(
SQI_MODULE_ID index
);
Description
This routine returns the number of dummy bytes to be sent to the flash after the address bytes, i.e., before doing a fast read.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t dummyBytes = PLIB_SQI_XIPDummyBytesGet(MY_SQI_INSTANCE);
5.6.23.5.3.10 PLIB_SQI_XIPDummyBytesSet Function
C
void PLIB_SQI_XIPDummyBytesSet(
SQI_MODULE_ID index,
SQI_DUMMY_BYTES bytes
);
Description
This routine sets the number of dummy bytes to be sent to the flash after the address bytes, i.e., before doing a fast read.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
bytes Number of dummy bytes
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_XIPDummyBytesSet(MY_SQI_INSTANCE, DUMMY_BYTE_1);
5.6.23.5.3.11 PLIB_SQI_XIPLaneModeGet Function
C
SQI_LANE_MODE PLIB_SQI_XIPLaneModeGet(
SQI_MODULE_ID index
);
Description
This routine returns the the number of SQI lanes ((single/dual/quad)) used in XIP mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Lane Mode (Single/Dual/Quad) that SQI Command uses.
Remarks
This routine can't be called when in XIP mode.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
SQI_LANE_MODE laneMode = PLIB_SQI_XIPCommandTypeGet(MY_SQI_INSTANCE);
5.6.23.5.3.12 PLIB_SQI_XIPLaneModeSet Function
C
void PLIB_SQI_XIPLaneModeSet(
SQI_MODULE_ID index,
SQI_LANE_MODE dataLanes,
SQI_LANE_MODE dummyLanes,
SQI_LANE_MODE modeLanes,
SQI_LANE_MODE addrLanes,
SQI_LANE_MODE cmdLanes
);
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Description
This routine selects the lane (Single/Dual/Quad) mode for different transaction in XIP mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
dataLanes Data lane mode (single/dual/quad)
dummyLanes Dummy lane mode (single/dual/quad)
modeLanes Mode lane mode (single/dual/quad)
addrLanes Address lane mode (single/dual/quad)
cmdLanes Command lane mode (single/dual/quad)
Returns
None.
Remarks
This routine can't be called when in XIP mode.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_XIPLaneModeSet(MY_SQI_INSTANCE,
SQI_QUAD_SINGLE,
SQI_QUAD_SINGLE,
SQI_QUAD_SINGLE,
SQI_QUAD_SINGLE,
SQI_QUAD_SINGLE
);
5.6.23.5.3.13 PLIB_SQI_XIPModeBytesGet Function
C
SQI_MODE_BYTES PLIB_SQI_XIPModeBytesGet(
SQI_MODULE_ID index
);
Description
This routine returns the number of bytes for the mode code command in XIP mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Number of Bytes used for Mode Code Command.
Remarks
None.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
SQI_MODE_BYTES modeCodeBytes = PLIB_SQI_XIPModeBytesGet(MY_SQI_INSTANCE);
5.6.23.5.3.14 PLIB_SQI_XIPModeBytesSet Function
C
void PLIB_SQI_XIPModeBytesSet(
SQI_MODULE_ID index,
SQI_MODE_BYTES bytes
);
Description
This routine sets the number of bytes for the mode code command in XIP mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
bytes Number of bytes of Mode code
Returns
None.
Remarks
Refer to serial device datasheet for the details on this command.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_XIPModeBytesSet(MY_SQI_INSTANCE, MODE_BYTES_0);
5.6.23.5.3.15 PLIB_SQI_XIPModeCodeGet Function
C
uint8_t PLIB_SQI_XIPModeCodeGet(
SQI_MODULE_ID index
);
Description
This routine returns the mode code command (opcode) in XIP mode for the devices that support it.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Mode Code Opcode.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t modeCode = PLIB_SQI_XIPModeCodeGet(MY_SQI_INSTANCE);
5.6.23.5.3.16 PLIB_SQI_XIPModeCodeSet Function
C
void PLIB_SQI_XIPModeCodeSet(
SQI_MODULE_ID index,
uint8_t code
);
Description
This routine sets the mode code command in XIP mode for the supported flash devices.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
code Mode code (byte)
Returns
None.
Remarks
Some of the devices seems to support this command, refer to specific serial device data sheet for op-code and sequence details.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_XIPModeCodeSet(MY_SQI_INSTANCE, MY_MODE_CODE);
5.6.23.5.3.17 PLIB_SQI_XIPReadOpcodeGet Function
C
uint8_t PLIB_SQI_XIPReadOpcodeGet(
SQI_MODULE_ID index
);
Description
This routine returns the read opcode used in XIP mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Returns
Read Opcode.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t readOpcode = PLIB_SQI_XIPReadOpcodeGet(MY_SQI_INSTANCE);
5.6.23.5.3.18 PLIB_SQI_XIPReadOpcodeSet Function
C
void PLIB_SQI_XIPReadOpcodeSet(
SQI_MODULE_ID index,
uint8_t opCode
);
Description
This routine sets the flash read opcode in XIP mode. Value of read opcode depends on the flash device attached.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
opCode Flash read opcode
Returns
None.
Remarks
Refer to the flash device datasheet for supported read opcodes.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and MY_READ_OPCODE is the opcode dependant on
// attached serial device.
PLIB_SQI_XIPReadOpcodeSet(MY_SQI_INSTANCE, MY_READ_OPCODE);
5.6.23.5.4 PIO Mode Transfer Management Functions
5.6.23.5.4.1 PLIB_SQI_ByteCountGet Function
C
uint16_t PLIB_SQI_ByteCountGet(
SQI_MODULE_ID index
);
Description
This routine returns the transmit/receive count, which is set by software and is actively contrtolled and maintained by hardware.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2937
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
count Transmit/Receive count
Returns
Transfer Count.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint16_t xferCount = PLIB_SQI_ByteCountGet(MY_SQI_INSTANCE);
5.6.23.5.4.2 PLIB_SQI_ByteCountSet Function
C
void PLIB_SQI_ByteCountSet(
SQI_MODULE_ID index,
uint16_t xferCount
);
Description
This routine sets the number of bytes to transmit or receive, which is set by software and is actively contrtolled and maintained
by hardware.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
count Transmit/Receive count
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and MY_XFER_COUNT is the transfer count.
PLIB_SQI_ByteCountSet(MY_SQI_INSTANCE, MY_XFER_COUNT);
5.6.23.5.4.3 PLIB_SQI_ChipSelectDeassertDisable Function
C
void PLIB_SQI_ChipSelectDeassertDisable(
SQI_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2938
);
Description
This routine disables the chip select de-assert. Chip select stays asserted after transmission or reception of specified number of
bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_ChipSelectDeassertDisable(MY_SQI_INSTANCE);
5.6.23.5.4.4 PLIB_SQI_ChipSelectDeassertEnable Function
C
void PLIB_SQI_ChipSelectDeassertEnable(
SQI_MODULE_ID index
);
Description
This routine enables chip select de-assert. Chip select is de-asserted after transmission or reception of the specified number of
bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_ChipSelectDeassertEnable(MY_SQI_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2939
5.6.23.5.4.5 PLIB_SQI_ChipSelectGet Function
C
SQI_CS_NUM PLIB_SQI_ChipSelectGet(
SQI_MODULE_ID index
);
Description
This routine returns the chip select that is currently active.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Chip Select (2-bit) - Current chip select active (0/1).
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
SQI_CS_NUM csNum = PLIB_SQI_ChipSelectGet(MY_SQI_INSTANCE);
5.6.23.5.4.6 PLIB_SQI_ChipSelectSet Function
C
void PLIB_SQI_ChipSelectSet(
SQI_MODULE_ID index,
SQI_CS_NUM csNum
);
Description
This routine sets the chip select to be activated on the next transaction.
Preconditions
Make sure the chip select output enable is selected on the CS lines (PLIB_SQI_CSOutputEnableSelect).
Parameters
Parameters Description
index Identifier for the device instance to be configured
csNum Chip select number
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2940
// application developer and SQI_CS_NUM_0 is the enum element.
PLIB_SQI_ChipSelectSet(MY_SQI_INSTANCE, SQI_CS_NUM_0);
5.6.23.5.4.7 PLIB_SQI_ConfigWordGet Function
C
uint32_t PLIB_SQI_ConfigWordGet(
SQI_MODULE_ID index
);
Description
This routine returns the SQI configuration word.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint32_t sqiCfg = PLIB_SQI_ConfigWordGet (MY_SQI_INSTANCE);
5.6.23.5.4.8 PLIB_SQI_ConfigWordSet Function
C
void PLIB_SQI_ConfigWordSet(
SQI_MODULE_ID index,
bool sqiEnable,
SQI_CS_OEN csPins,
SQI_DATA_OEN dataPins,
bool reset,
bool burstEn,
bool hold,
bool writeProtect,
bool rxLatch,
SQI_DATA_FORMAT lsbf,
SQI_DATA_MODE dataMode,
SQI_XFER_MODE xferMode
);
Description
This routine sets SQI Configuration Word. This API is cumulation of multiple APIs, in case driver plans to write the complete
configuration word.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2941
Parameters
Parameters Description
index Identifier for the device instance to be configured
sqiEnable Enables/Disables the SQI module
csPins Chip Select Output Enable
dataPins Data Output Enable
reset Resets control, transmit, receive buffers and state machines
burstEn Burst Enable (always set to '1')
hold SQID2 to act as HOLD# signal in single and dual lane modes
writeProtect SQID3 to act as WP# signal in single and dual lane modes
rxLatch Activates receive latch in transmit mode
lsbf Sets data endian mode to least significant bit first (LSBF)
dataMode Sets data mode to mode 0/mode 1/serial flash mode
xferMode Sets transfer mode to XIP/DMA/PIO mode
Returns
None.
Remarks
Chip select is not actually asserted, only enabled to be asserted.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_ConfigWordSet(MY_SQI_INSTANCE,
1,
SQI_CS_OEN_0,
SQI_DATA_OEN_QUAD,
0,
1,
0,
0,
0,
SQI_DATA_FORMAT_LSBF,
SQI_DATA_MODE_3,
SQI_XFER_MODE_PIO
);
5.6.23.5.4.9 PLIB_SQI_ReceiveBufferIsUnderrun Function
C
bool PLIB_SQI_ReceiveBufferIsUnderrun(
SQI_MODULE_ID index
);
Description
This routine returns the status of the receive buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2942
Returns
True if Receive Buffer is Underrun, False if not.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
bool rxun = PLIB_SQI_ReceiveBufferIsUnderrun(MY_SQI_INSTANCE);
5.6.23.5.4.10 PLIB_SQI_RxBufferThresholdGet Function
C
uint8_t PLIB_SQI_RxBufferThresholdGet(
SQI_MODULE_ID index
);
Description
This routine returns the receive command threshold that is used to monitor receives based on the receive buffer space
availability.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Receive Buffer Threshold value.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t rxBufThres = PLIB_SQI_RxCommandThresholdGet(MY_SQI_INSTANCE);
5.6.23.5.4.11 PLIB_SQI_RxBufferThresholdIntGet Function
C
uint8_t PLIB_SQI_RxBufferThresholdIntGet(
SQI_MODULE_ID index
);
Description
This routine returns the receive buffer threshold used to set an interrupt.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2943
Parameters
Parameters Description
index Identifier for the device instance to be configured
threshold Receive interrupt (buffer) threshold
Returns
Receive Buffer Threshold value (used to trigger an interrupt).
Remarks
This is a 5-bit fild and bits 7,6,5 are ignored in the char.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t rxBufIntThres = PLIB_SQI_RxBufferThresholdIntGet(MY_SQI_INSTANCE);
5.6.23.5.4.12 PLIB_SQI_RxBufferThresholdIntSet Function
C
void PLIB_SQI_RxBufferThresholdIntSet(
SQI_MODULE_ID index,
uint8_t threshold
);
Description
This routine sets the receive buffer threshold used to trigger an interrupt. Sets an interrpt condition when receive buffer count is
larger than or equal to the receive interrupt threshold bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
threshold Receive buffer threshold for interrupt
Returns
None.
Remarks
This is a 5-bit fild and bits 7,6,5 are ignored in the char.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and MY_RX_INT_THRESHOLD is the threshold value.
PLIB_SQI_RxBufferThresholdIntSet(MY_SQI_INSTANCE, MY_RX_INT_THRESHOLD);
5.6.23.5.4.13 PLIB_SQI_RxBufferThresholdSet Function
C
void PLIB_SQI_RxBufferThresholdSet(
SQI_MODULE_ID index,
uint8_t threshold
);
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2944
Description
This routine sets the receive command threshold that is used to monitor receives based on the receive buffer space availability.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
threshold Receive command (buffer) threshold
Returns
None.
Remarks
Valid threshold values are 0-31.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and MY_RECEIVE_THRESHOLD is the receive threshold value.
PLIB_SQI_RxCommandThresholdSet(MY_SQI_INSTANCE, MY_RECEIVE_THRESHOLD);
5.6.23.5.4.14 PLIB_SQI_TransferDirectionGet Function
C
SQI_XFER_CMD PLIB_SQI_TransferDirectionGet(
SQI_MODULE_ID index
);
Description
This routine returns the transfer command that is active currently.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Transfer Command (Idle/Receive/Transmit).
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
SQI_XFER_CMD xferDirection = PLIB_SQI_TransferDirectionGet(MY_SQI_INSTANCE);
5.6.23.5.4.15 PLIB_SQI_TransferDirectionSet Function
C
void PLIB_SQI_TransferDirectionSet(
SQI_MODULE_ID index,
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2945
SQI_XFER_CMD command
);
Description
This routine sets the transfer command to Idle/Transmit/Receive.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
command Transfer command
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and SQI_CMD_TRANSMIT is an enum element.
PLIB_SQI_TransferDirectionSet(MY_SQI_INSTANCE, SQI_CMD_TRANSMIT);
5.6.23.5.4.16 PLIB_SQI_TransmitBufferFreeSpaceGet Function
C
uint8_t PLIB_SQI_TransmitBufferFreeSpaceGet(
SQI_MODULE_ID index
);
Description
This routine returns the number of transmit buffer bytes available.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Amont of transmit buffer space free in bytes.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t txBufFreeSpace = PLIB_SQI_TransmitBufferFreeSpaceGet(MY_SQI_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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5.6.23.5.4.17 PLIB_SQI_TransmitBufferHasOverflowed Function
C
bool PLIB_SQI_TransmitBufferHasOverflowed(
SQI_MODULE_ID index
);
Description
This routine returns the current state of the transmit buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
True if Transmit Buffer has Overflowed, false if not.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
bool txOv = PLIB_SQI_TransmitBufferHasOverflowed(MY_SQI_INSTANCE);
5.6.23.5.4.18 PLIB_SQI_TxBufferThresholdGet Function
C
uint8_t PLIB_SQI_TxBufferThresholdGet(
SQI_MODULE_ID index
);
Description
This routine returns the transmit command threshold value that is used to monitor transmits based on the transmit buffer space
availability.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Transmit buffer threshold value.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2947
uint8_t txThreshold = PLIB_SQI_TxBufferThresholdGet(MY_SQI_INSTANCE);
5.6.23.5.4.19 PLIB_SQI_TxBufferThresholdIntGet Function
C
uint8_t PLIB_SQI_TxBufferThresholdIntGet(
SQI_MODULE_ID index
);
Description
This routine returns the transmit buffer threshold used to set an interrupt. When enabled, interrupt is triggered when transmit
buffer has more space than the transmit interrupt threshold bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Transmit buffer threshold for interrupt.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t txBufIntThres = PLIB_SQI_TxBufferThresholdIntGet(MY_SQI_INSTANCE);
5.6.23.5.4.20 PLIB_SQI_TxBufferThresholdIntSet Function
C
void PLIB_SQI_TxBufferThresholdIntSet(
SQI_MODULE_ID index,
uint8_t threshold
);
Description
This routine sets the transmit buffer threshold used for an interrupt. When enabled, interrupt is triggered when transmit buffer has
more space than the transmit interrupt threshold bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
threshold Transmit interrupt (buffer) threshold
Returns
None.
Remarks
This is a 5-bit fild and bits 7,6,5 are ignored in the char.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and MY_TX_INT_THRESHOLD is the threshold value.
PLIB_SQI_TxBufferThresholdIntSet(MY_SQI_INSTANCE, MY_TX_INT_THRESHOLD);
5.6.23.5.4.21 PLIB_SQI_TxBufferThresholdSet Function
C
void PLIB_SQI_TxBufferThresholdSet(
SQI_MODULE_ID index,
uint8_t threshold
);
Description
This routine sets the transmit command threshold, which is used to control transmits based on the transmit buffer space
availability.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
threshold Transmit command (buffer) threshold
Returns
None.
Remarks
Valid threshold values are 0-31.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and MY_TRANSMIT_THRESHOLD is the threshold value.
PLIB_SQI_TxBufferThresholdSet(MY_SQI_INSTANCE, MY_TRANSMIT_THRESHOLD);
5.6.23.5.5 Interrupt Control and Status Management Functions
5.6.23.5.5.1 PLIB_SQI_DataLineStatus Function
C
bool PLIB_SQI_DataLineStatus(
SQI_MODULE_ID index,
bool dataPin
);
Description
This routine returns the logical status of the data lines(0/1).
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
dataPin Data pin for which status will be returned (0/1/2/3)
Returns
SQIDx Status (High/Low).
Remarks
Parsing values other than 0/1/2/3 returns SQID0 pin status.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
bool sqiDataLineStatus = PLIB_SQI_DataLineStatus(MY_SQI_INSTANCE, 3);
5.6.23.5.5.2 PLIB_SQI_InterruptDisable Function
C
void PLIB_SQI_InterruptDisable(
SQI_MODULE_ID index,
SQI_INTERRUPTS interruptFlag
);
Description
This routine disables the interrupt source passed into the function.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
interruptFlag Interrupt to be disabled
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer and TXFULL is an enum element.
PLIB_SQI_InterruptDisable(MY_SQI_INSTANCE, SQI_TXFULL);
5.6.23.5.5.3 PLIB_SQI_InterruptEnable Function
C
void PLIB_SQI_InterruptEnable(
SQI_MODULE_ID index,
SQI_INTERRUPTS interruptFlag
);
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Description
This routine enables the interrupt source passed into the function.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
interruptFlag Interrupt to be enabled
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_InterruptEnable(MY_SQI_INSTANCE, SQI_TXFULL);
5.6.23.5.5.4 PLIB_SQI_InterruptFlagGet Function
C
bool PLIB_SQI_InterruptFlagGet(
SQI_MODULE_ID index,
SQI_INTERRUPTS interruptFlag
);
Description
This routine returns the SQI interrupt source flag status (set/cleared).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt flag of interest
Returns
Interrupt status.
Remarks
None.
Example
if ( PLIB_SQI_InterruptFlagGet(MY_SQI_INSTANCE,SQI_INT_ANY) )
if ( PLIB_SQI_InterruptFlagGet(MY_SQI_INSTANCE,SQI_TXFULL) )
{
...
}
if ( PLIB_SQI_InterruptFlagGet(MY_SQI_INSTANCE,SQI_RXFULL) )
{
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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...
}
.
.
.
}
5.6.23.5.5.5 PLIB_SQI_InterruptIsEnabled Function
C
bool PLIB_SQI_InterruptIsEnabled(
SQI_MODULE_ID index,
SQI_INTERRUPTS interruptFlag
);
Description
This routine returns the interrupt state.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
interruptFlag Interrupt under check
Returns
True if Interrupt is Enabled, else false.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
if (PLIB_SQI_InterruptIsEnabled(MY_SQI_INSTANCE, SQI_TXFULL))
{
..
}
5.6.23.5.5.6 PLIB_SQI_InterruptSignalDisable Function
C
void PLIB_SQI_InterruptSignalDisable(
SQI_MODULE_ID index,
SQI_INTERRUPTS interruptFlag
);
Description
This routine disables the interrupt signals source passed into the function, thus prohibitting it from reaching to the external
interrupt controller.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
interruptFlag Interrupt to be disabled
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_InterruptSignalDisable(MY_SQI_INSTANCE, SQI_TXFULL);
5.6.23.5.5.7 PLIB_SQI_InterruptSignalEnable Function
C
void PLIB_SQI_InterruptSignalEnable(
SQI_MODULE_ID index,
SQI_INTERRUPTS interruptFlag
);
Description
This routine enables the interrupt signal source passed into the function, thus letting it go out to the external interrupt controller.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
interruptFlag Interrupt to be enabled
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_InterruptSignalEnable(MY_SQI_INSTANCE, SQI_TXFULL);
5.6.23.5.5.8 PLIB_SQI_InterruptSignalIsEnabled Function
C
bool PLIB_SQI_InterruptSignalIsEnabled(
SQI_MODULE_ID index,
SQI_INTERRUPTS interruptFlag
);
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Description
This routine returns the interrupt signal state.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
interruptFlag Interrupt signal under check
Returns
Boolean flag - Interrupt state true - Interrupt signal is enabled false - Interrupt signal is disabled
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
if (PLIB_SQI_InterruptSignalIsEnabled(MY_SQI_INSTANCE, SQI_TXFULL))
{
..
}
5.6.23.5.6 DMA Buffer Address Management Functions
5.6.23.5.6.1 PLIB_SQI_DMABDBaseAddressGet Function
C
void* PLIB_SQI_DMABDBaseAddressGet(
SQI_MODULE_ID index
);
Description
This routine returns the address of the base DMA buffer descriptor.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Base Buffer Descriptor Address.
Remarks
Check to make sure if DMA Buffer Descriptor fetch is in progress.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
void *baseBDAddress;
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If (!PLIB_SQI_DMAIsActive(MY_SQI_INSTANCE))
{
baseBDAddress = PLIB_SQI_DMABDBaseAddressGet(MY_SQI_INSTANCE);
}
5.6.23.5.6.2 PLIB_SQI_DMABDBaseAddressSet Function
C
void PLIB_SQI_DMABDBaseAddressSet(
SQI_MODULE_ID index,
void * baseBDAddress
);
Description
This routine writes the address of the base (first/only) buffer descriptor into the buffer descriptor base address register.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
baseBDAddress Base buffer descriptor address
Returns
None.
Remarks
Check to make sure if DMA Buffer Descriptor fetch is in progress.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
if (!PLIB_SQI_DMAIsActive(MY_SQI_INSTANCE))
PLIB_SQI_DMABDBaseAddressSet(MY_SQI_INSTANCE, (void *) (&MY_BD_STRUCT));
5.6.23.5.6.3 PLIB_SQI_DMABDCurrentAddressGet Function
C
void* PLIB_SQI_DMABDCurrentAddressGet(
SQI_MODULE_ID index
);
Description
This routine returns the address of the DMA buffer descriptor that is currently in progress.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Current Buffer Descriptor Address.
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Remarks
Check to make sure if DMA Buffer Descriptor fetch is in progress.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint32_t currentBDAddress;
If (PLIB_SQI_DMAIsActive(MY_SQI_INSTANCE))
{
void* currentBDAddress = PLIB_SQI_DMABDCurrentAddressGet(MY_SQI_INSTANCE);
}
5.6.23.5.7 DMA Buffer Descriptor Management Functions
5.6.23.5.7.1 PLIB_SQI_DMABDControlWordGet Function
C
uint16_t PLIB_SQI_DMABDControlWordGet(
SQI_MODULE_ID index
);
Description
This routine returns current buffer descriptor control word information excluding buffer length. This information is returned in
transmit and receive status functions.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Control Word - DMA Buffer Desciptor Control Word
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint16_t dmabdconword;
dmabdconword = PLIB_SQI_DMABDControlWordGet(MY_SQI_INSTANCE);
switch (dmabdconword)
{
case BD_ENABLED: ...;
case BD_DISABLED: ...;
.
.
.
}
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5.6.23.5.7.2 PLIB_SQI_DMABDReceiveBufferCountGet Function
C
uint8_t PLIB_SQI_DMABDReceiveBufferCountGet(
SQI_MODULE_ID index
);
Description
This routine returns the current receive buffer space in bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Receive buffer space in bytes.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t bdRxBufCount = PLIB_SQI_DMABDReceiveBufferCountGet(MY_SQI_INSTANCE);
5.6.23.5.7.3 PLIB_SQI_DMABDReceiveBufferLengthGet Function
C
uint8_t PLIB_SQI_DMABDReceiveBufferLengthGet(
SQI_MODULE_ID index
);
Description
This routine returns the current receive length in bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Receive buffer space in bytes.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t bdRxBufLength = PLIB_SQI_DMABDReceiveBufferLengthGet(MY_SQI_INSTANCE);
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5.6.23.5.7.4 PLIB_SQI_DMABDReceiveStateGet Function
C
SQI_BD_STATE PLIB_SQI_DMABDReceiveStateGet(
SQI_MODULE_ID index
);
Description
This routine returns the current state of the buffer descriptor in progress.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Status - DMA Buffer Descriptor State
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t bdrxState = PLIB_SQI_DMABDReceiveStateGet(MY_SQI_INSTANCE);
switch (bdRxState)
{
case BD_IDLE: ...;
case BD_STATE_FETCH_REQ_PENDING: ...;
.
.
.
}
5.6.23.5.7.5 PLIB_SQI_DMABDTransmitBufferCountGet Function
C
uint8_t PLIB_SQI_DMABDTransmitBufferCountGet(
SQI_MODULE_ID index
);
Description
This routine returns the current transmit buffer space in bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Transmit buffer space in bytes.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t bdTxBufCount = PLIB_SQI_DMABDTransmitBufferCountGet(MY_SQI_INSTANCE);
5.6.23.5.7.6 PLIB_SQI_DMABDTransmitBufferLengthGet Function
C
uint8_t PLIB_SQI_DMABDTransmitBufferLengthGet(
SQI_MODULE_ID index
);
Description
This routine returns the current transmit length in bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Transmit buffer space in bytes.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t bdTxBufLength = PLIB_SQI_DMABDTransmitBufferLengthGet(MY_SQI_INSTANCE);
5.6.23.5.7.7 PLIB_SQI_DMABDTransmitStateGet Function
C
SQI_BD_STATE PLIB_SQI_DMABDTransmitStateGet(
SQI_MODULE_ID index
);
Description
This routine returns the current state of the buffer descriptor in progress.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Status - DMA Buffer Descriptor State
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
5-2959
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t bdTxState = PLIB_SQI_DMABDTransmitStateGet(MY_SQI_INSTANCE);
switch (bdTxState)
{
case BD_IDLE: ...;
case BD_FETCH_REQ_PENDING: ...;
.
.
.
}
5.6.23.5.8 DMA Control and Status Management Functions
5.6.23.5.8.1 PLIB_SQI_DMABDFetchStart Function
C
void PLIB_SQI_DMABDFetchStart(
SQI_MODULE_ID index
);
Description
This routine starts the DMA buffer descriptor fetch process.
Preconditions
Make sure the buffer descreptors are setup and the buffer descriptor base address register is pointing to the first/only buffer
descriptor. Also ensure any previous BD processing is fixed.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_DMABDFetchStart(MY_SQI_INSTANCE);
5.6.23.5.8.2 PLIB_SQI_DMABDIsBusy Function
C
bool PLIB_SQI_DMABDIsBusy(
SQI_MODULE_ID index
);
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Description
This routine returns true if DMA buffer descriptor process is busy, if not returns false.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
True if DMA Buffer Desciptor is Busy.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
bool bdBusy = PLIB_SQI_DMABDIsBusy(MY_SQI_INSTANCE)
5.6.23.5.8.3 PLIB_SQI_DMABDPollCounterSet Function
C
void PLIB_SQI_DMABDPollCounterSet(
SQI_MODULE_ID index,
uint16_t pollCount
);
Description
This routine sets the poll counter value that indicates the number of cycles the DMA would wait before fetching the next
descriptor word, if the current descriptor fetched was disabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pollControl Polling value
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
if (PLIB_SQI_DMABDPollIsEnabled(MY_SQI_INSTANCE)
{
PLIB_SQI_DMABDPollCounterSet(MY_SQI_INSTANCE, MY_POLL_VALUE);
}
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5.6.23.5.8.4 PLIB_SQI_DMABDPollDisable Function
C
void PLIB_SQI_DMABDPollDisable(
SQI_MODULE_ID index
);
Description
This routine disables the buffer descriptor polling.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_DMABDPollDisable(MY_SQI_INSTANCE);
5.6.23.5.8.5 PLIB_SQI_DMABDPollEnable Function
C
void PLIB_SQI_DMABDPollEnable(
SQI_MODULE_ID index
);
Description
This routine enables the buffer descriptor polling and works in tandum with poll control register.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Enable this control bit only when you are planning to have dead descriptors in the linked list.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_DMABDPollEnable(MY_SQI_INSTANCE);
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5.6.23.5.8.6 PLIB_SQI_DMABDPollIsEnabled Function
C
bool PLIB_SQI_DMABDPollIsEnabled(
SQI_MODULE_ID index
);
Description
This routine returns true/false if DMA buffer descriptor poll is enabled/disabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
True if DMA Poll Control is Enabled, else it's false.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
If (PLIB_SQI_DMABDPollIsEnabled(MY_SQI_INSTANCE))
{
PLIB_SQI_PollControlSet(MY_SQI_INSTANCE, MY_POLL_CONTROL_VALUE);
}
5.6.23.5.8.7 PLIB_SQI_DMABDStateGet Function
C
SQI_BD_STATE PLIB_SQI_DMABDStateGet(
SQI_MODULE_ID index
);
Description
This routine returns the current state of the buffer descriptor in progress.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Status - DMA Buffer Descriptor State
Remarks
None.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
uint8_t bdState = PLIB_SQI_DMABDStateGet(MY_SQI_INSTANCE);
switch (bdState)
{
case BD_IDLE: ...;
case BD_FETCH_REQ_PENDING: ...;
.
.
.
}
5.6.23.5.8.8 PLIB_SQI_DMADisable Function
C
void PLIB_SQI_DMADisable(
SQI_MODULE_ID index
);
Description
This routine disables the built-in DMA logic for data transfer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_DMADisable(MY_SQI_INSTANCE);
5.6.23.5.8.9 PLIB_SQI_DMAEnable Function
C
void PLIB_SQI_DMAEnable(
SQI_MODULE_ID index
);
Description
This routine enables the built-in DMA logic for data transfer.
Preconditions
DMA buffer descriptors need to be setup before enabling the DMA.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
PLIB_SQI_DMAEnable(MY_SQI_INSTANCE);
5.6.23.5.8.10 PLIB_SQI_DMAHasStarted Function
C
bool PLIB_SQI_DMAHasStarted(
SQI_MODULE_ID index
);
Description
This routine returns true if DMA process started and false if DMA process has not started.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
True if DMA process has started, false if not.
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
bool dmaStarted = PLIB_SQI_DMAHasStarted (MY_SQI_INSTANCE)
5.6.23.5.8.11 PLIB_SQI_DMAIsEnabled Function
C
bool PLIB_SQI_DMAIsEnabled(
SQI_MODULE_ID index
);
Description
This routine returns true/false if DMA is enabled/disabled.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
Boolean Flag - DMA Enable Status true - DMA is enabled false - DMA is disabled
Remarks
None.
Example
// Where MY_SQI_INSTANCE, is the SQI instance selected for use by the
// application developer.
If (PLIB_SQI_DMAIsEnabled(MY_SQI_INSTANCE))
{
...
}
5.6.23.5.9 Data Types and Constants
5.6.23.5.9.1 SQI_ADDR_BYTES Enumeration
C
typedef enum {
ADDR_BYTES_4,
ADDR_BYTES_3,
ADDR_BYTES_2,
ADDR_BYTES_1,
ADDR_BYTES_0
} SQI_ADDR_BYTES;
Description
SQI Number of Address Bytes
This macro defines the list of SQI Address Bytes
Members
Members Description
ADDR_BYTES_4 SQI is set to Transmit 4 Address Bytes
ADDR_BYTES_3 SQI is set to Transmit 3 Address Bytes
ADDR_BYTES_2 SQI is set to Transmit 2 Address Bytes
ADDR_BYTES_1 SQI is set to Transmit 1 Address Bytes
ADDR_BYTES_0 SQI is set to Transmit No Address Bytes
5.6.23.5.9.2 SQI_BD_CTRL_WORD Enumeration
C
typedef enum {
BD_ENABLE,
BD_DISABLE,
CS_1_ACTIVE,
CS_0_ACTIVE,
FLASH_SC_ENABLE,
FLASH_SC_DISABLE,
SET_LSBF,
5.6 Peripheral Library Help MPLAB Harmony Help SQI Peripheral Library
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SET_MSBF,
DMA_LANE_QUAD,
DMA_LANE_DUAL,
DMA_LANE_SINGLE,
DMA_IN_TRANSMIT,
DMA_IN_RECEIVE,
LAST_BD,
NOT_LAST_BD,
LAST_PKT,
NOT_LAST_PKT,
PKT_INT_ENABLE,
PKT_INT_DISABLE,
BD_DONE_INT_ENABLE,
BD_DONE_INT_DISABLE,
BD_BUF_LENGTH
} SQI_BD_CTRL_WORD;
Description
SQI Buffer Descriptor Cotrol Words
This macro defines the list of SQI Buffer Descriptor Control Word
Members
Members Description
BD_ENABLE Current Buffer Descriptor is Enabled
BD_DISABLE Current Buffer Descriptor is Disabled
CS_1_ACTIVE Chip Select 1 is Active
CS_0_ACTIVE Chip Select 0 is Active
FLASH_SC_ENABLE Automatic Status Check Enabled
FLASH_SC_DISABLE Automatic Status Check Disabled
SET_LSBF Least Significant Bit First
SET_MSBF Most Significant Bit First
DMA_LANE_QUAD DMA writes/reads in Quad Lane Mode
DMA_LANE_DUAL DMA writes/reads in Dual Lane Mode
DMA_LANE_SINGLE DMA writes/reads in Single Lane Mode
DMA_IN_TRANSMIT DMA is Transmitting
DMA_IN_RECEIVE DMA is Receieving
LAST_BD Indicates Last Buffer Descriptor in the List
NOT_LAST_BD Indicates Non Last Buffer Descriptor in the List
LAST_PKT Indicates Last Packet of the Data Chunk
NOT_LAST_PKT Indicates Non Last Packet of the Data Chunk
PKT_INT_ENABLE Indicates Packet Interrupt is Enabled
PKT_INT_DISABLE Indicates Packet Interrupt is Disabled
BD_DONE_INT_ENABLE Indicates Buffer Descriptor Done Interrupt is Enabled
BD_DONE_INT_DISABLE Indicates Buffer Descriptor Done Interrupt is Disabled
BD_BUF_LENGTH Indicates Biuffer Length
5.6.23.5.9.3 SQI_BD_STATE Enumeration
C
typedef enum {
BD_STATE_DISABLED,
BD_STATE_DONE,
BD_STATE_PROCESSING_DATA,
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BD_STATE_BEING_FETCHED,
BD_STATE_FETCH_REQ_PENDING,
BD_STATE_IDLE
} SQI_BD_STATE;
Description
SQI Buffer Descriptor (BD) State
This macro defines the list of SQI Buffer Descriptor states
Members
Members Description
BD_STATE_DISABLED Fetched Buffer Descriptor is Disabled
BD_STATE_DONE Fetched Buffer Descriptor Processed
BD_STATE_PROCESSING_DATA Fetched Buffer Descriptor is in Data transfer phase
BD_STATE_BEING_FETCHED In the process of Fetching the Buffer Descriptor
BD_STATE_FETCH_REQ_PENDING Buffer Descriptor Fetch Request Pending
BD_STATE_IDLE Buffer Desciptor process is idle
5.6.23.5.9.4 SQI_CLK_DIV Enumeration
C
typedef enum {
CLK_DIV_256,
CLK_DIV_128,
CLK_DIV_64,
CLK_DIV_32,
CLK_DIV_16,
CLK_DIV_8,
CLK_DIV_4,
CLK_DIV_2,
CLK_DIV_1
} SQI_CLK_DIV;
Description
SQI Clock Divider
This macro defines the list of SQI Clock Divider Values
Members
Members Description
CLK_DIV_256 SQI Clock is divided by 256
CLK_DIV_128 SQI Clock is divided by 128
CLK_DIV_64 SQI Clock is divided by 64
CLK_DIV_32 SQI Clock is divided by 32
CLK_DIV_16 SQI Clock is divided by 16
CLK_DIV_8 SQI Clock is divided by 8
CLK_DIV_4 SQI Clock is divided by 4
CLK_DIV_2 SQI Clock is divided by 2
CLK_DIV_1 SQI Clock is not divided
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5.6.23.5.9.5 SQI_CS_NUM Enumeration
C
typedef enum {
SQI_CS_1,
SQI_CS_0
} SQI_CS_NUM;
Description
SQI Device Select or Chip Select
This macro defines the list of SQI Chip Selects
Members
Members Description
SQI_CS_1 SQI Chip Select 1
SQI_CS_0 SQI Chip Select 0
5.6.23.5.9.6 SQI_CS_OEN Enumeration
C
typedef enum {
SQI_CS_OEN_BOTH,
SQI_CS_OEN_1,
SQI_CS_OEN_0,
SQI_CS_OEN_NONE
} SQI_CS_OEN;
Description
SQI Chip Select Output Enable
This macro defines the list of SQI Chip Select Output Enables
Members
Members Description
SQI_CS_OEN_BOTH SQI chip select 0 and 1 are enabled
SQI_CS_OEN_1 SQI chip select 1 is enabled but chip select 0 is disabled
SQI_CS_OEN_0 SQI chip select 0 is enabled but chip select 1 is disabled
SQI_CS_OEN_NONE SQI chip select 0 and 1 are disabled
5.6.23.5.9.7 SQI_DATA_FORMAT Enumeration
C
typedef enum {
SQI_DATA_FORMAT_LSBF,
SQI_DATA_FORMAT_MSBF
} SQI_DATA_FORMAT;
Description
SQI Data Mode
This macro defines the Data Formats (LSBF/MSBF)
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Members
Members Description
SQI_DATA_FORMAT_LSBF SQI Data is Least Significant Bit First Formatted
SQI_DATA_FORMAT_MSBF SQI Data is Most Significant Bit First Formatted
5.6.23.5.9.8 SQI_DATA_MODE Enumeration
C
typedef enum {
SQI_DATA_MODE_SF,
SQI_DATA_MODE_3,
SQI_DATA_MODE_0
} SQI_DATA_MODE;
Description
SQI Data Mode
This macro defines the list of SQI Data Modes
Members
Members Description
SQI_DATA_MODE_SF SQI is in Serial Flash Mode
SQI_DATA_MODE_3 SQI is in SPI mode 3
SQI_DATA_MODE_0 SQI is in SPI mode 0
5.6.23.5.9.9 SQI_DATA_OEN Enumeration
C
typedef enum {
SQI_DATA_OEN_QUAD,
SQI_DATA_OEN_DUAL,
SQI_DATA_OEN_SINGLE
} SQI_DATA_OEN;
Description
SQI Data Output Enable
This macro defines the list of SQI Data Output Enables
Members
Members Description
SQI_DATA_OEN_QUAD SQI data outputs 3 to 0 are enabled (quad lane mode)
SQI_DATA_OEN_DUAL SQI data outputs 1 and 0 are enabled (dual lane mode)
SQI_DATA_OEN_SINGLE SQI data output 0 is enabled (single lane mode)
5.6.23.5.9.10 SQI_DATA_TYPE Type
C
typedef uint32_t SQI_DATA_TYPE;
Description
SQI Data Type definition
This data type defines the SQI Data size
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Remarks
None
5.6.23.5.9.11 SQI_DUMMY_BYTES Enumeration
C
typedef enum {
DUMMY_BYTES_7,
DUMMY_BYTES_6,
DUMMY_BYTES_5,
DUMMY_BYTES_4,
DUMMY_BYTES_3,
DUMMY_BYTES_2,
DUMMY_BYTE_1,
DUMMY_BYTES_0
} SQI_DUMMY_BYTES;
Description
SQI Number of Dummy Bytes
This macro defines the list of SQI Dummy Bytes after Address Bytes
Members
Members Description
DUMMY_BYTES_7 SQI is set to Transmit 7 Dummy Bytes
DUMMY_BYTES_6 SQI is set to Transmit 6 Dummy Bytes
DUMMY_BYTES_5 SQI is set to Transmit 5 Dummy Bytes
DUMMY_BYTES_4 SQI is set to Transmit 4 Dummy Bytes
DUMMY_BYTES_3 SQI is set to Transmit 3 Dummy Bytes
DUMMY_BYTES_2 SQI is set to Transmit 2 Dummy Bytes
DUMMY_BYTE_1 SQI is set to Transmit 1 Dummy Bytes
DUMMY_BYTES_0 SQI is set to Transmit No Dummy Bytes
5.6.23.5.9.12 SQI_INTERRUPTS Enumeration
C
typedef enum {
SQI_PKTCOMP,
SQI_BDDONE,
SQI_CONTHR,
SQI_CONEMPTY,
SQI_CONFULL,
SQI_RXTHR,
SQI_RXEMPTY,
SQI_RXFULL,
SQI_TXTHR,
SQI_TXEMPTY,
SQI_TXFULL,
SQI_ALL_INT
} SQI_INTERRUPTS;
Description
SQI Interrupt List
This macro defines the list of SQI Interrupts
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Members
Members Description
SQI_PKTCOMP SQI Packet Complete Interrupt (used in DMA mode)
SQI_BDDONE SQI Buffer Descriptor Done Interrupt (used in DMA mode)
SQI_CONTHR SQI Control Buffer Threshold Interrupt
SQI_CONEMPTY SQI Control Buffer Empty Interrupt
SQI_CONFULL SQI Control Buffer Full Interrupt
SQI_RXTHR SQI Receive Buffer Threshold Interrupt
SQI_RXEMPTY SQI Receive Buffer Empty Interrupt
SQI_RXFULL SQI Receive Buffer Full Interrupt
SQI_TXTHR SQI Transmit Buffer Threshold Interrupt
SQI_TXEMPTY SQI Transmit Buffer Empty Interrupt
SQI_TXFULL SQI Transmit Buffer Full Interrupt
SQI_ALL_INT All or any of the above interrupts
5.6.23.5.9.13 SQI_LANE_MODE Enumeration
C
typedef enum {
SQI_LANE_QUAD,
SQI_LANE_DUAL,
SQI_LANE_SINGLE
} SQI_LANE_MODE;
Description
SQI Lane Mode
This macro defines the list of SQI Lane Modes
Members
Members Description
SQI_LANE_QUAD SQI is set into Quad Lane Mode
SQI_LANE_DUAL SQI is set into Dual Lane Mode
SQI_LANE_SINGLE SQI is set into Single Lane Mode
5.6.23.5.9.14 SQI_MODE_BYTES Enumeration
C
typedef enum {
MODE_BYTES_3,
MODE_BYTES_2,
MODE_BYTES_1,
MODE_BYTES_0
} SQI_MODE_BYTES;
Description
SQI Number of Mode Bytes
This macro defines the list of SQI Mode Bytes allocated for Mode Code
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Members
Members Description
MODE_BYTES_3 SQI is set to Transmit 3 Mode Bytes
MODE_BYTES_2 SQI is set to Transmit 2 Mode Bytes
MODE_BYTES_1 SQI is set to Transmit 1 Mode Bytes
MODE_BYTES_0 SQI is set to Transmit No Mode Bytes
5.6.23.5.9.15 SQI_MODULE_ID Enumeration
C
typedef enum {
SQI_ID_1,
SQI_NUMBER_OF_MODULES
} SQI_MODULE_ID;
Description
SQI Module ID
This enumeration identifies the SQI modules which are available on the microcontroller. This is the super set of all the possible
instances that might be available on the Microchip microcontrollers.
Members
Members Description
SQI_ID_1 SQI Module 1 ID
SQI_NUMBER_OF_MODULES Number of available SQI modules
Remarks
The caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to
the next.
Not all modules will be available on all microcontrollers. Refer to the data sheet for the specific controller in use to determine
which modules are supported. The numbers used in the enumeration values will match the numbers given in the data sheet.
5.6.23.5.9.16 SQI_XFER_CMD Enumeration
C
typedef enum {
SQI_CMD_RECEIVE,
SQI_CMD_TRANSMIT,
SQI_CMD_IDLE
} SQI_XFER_CMD;
Description
SQI Transfer Command
This macro defines the list of SQI Transfer Commands
Members
Members Description
SQI_CMD_RECEIVE SQI issues a Receive Command
SQI_CMD_TRANSMIT SQI issues a Transmit Command
SQI_CMD_IDLE SQI is Idle
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5.6.23.5.9.17 SQI_XFER_MODE Enumeration
C
typedef enum {
SQI_XFER_MODE_XIP,
SQI_XFER_MODE_DMA,
SQI_XFER_MODE_PIO
} SQI_XFER_MODE;
Description
SQI Transfer Mode
This macro defines the list of SQI Transfer Modes
Members
Members Description
SQI_XFER_MODE_XIP SQI is in XIP mode
SQI_XFER_MODE_DMA SQI is in DMA mode
SQI_XFER_MODE_PIO SQI is in PIO mode
5.6.23.5.10 Feature Existence Functions
5.6.23.5.10.1 PLIB_SQI_ExistsBDBaseAddress Function
C
bool PLIB_SQI_ExistsBDBaseAddress(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDBaseAddress feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_DMABDBaseAddressSet
• PLIB_SQI_DMABDBaseAddressGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDBaseAddress feature is supported on the device
• false - The BDBaseAddress feature is not supported on the device
Remarks
None.
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5.6.23.5.10.2 PLIB_SQI_ExistsBDControlWord Function
C
bool PLIB_SQI_ExistsBDControlWord(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDControlWord feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_DMABDControlWordGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDControlWord feature is supported on the device
• false - The BDControlWord feature is not supported on the device
Remarks
None.
5.6.23.5.10.3 PLIB_SQI_ExistsBDCurrentAddress Function
C
bool PLIB_SQI_ExistsBDCurrentAddress(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDCurrentAddress feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_DMABDCurrentAddressGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDCurrentAddress feature is supported on the device
• false - The BDCurrentAddress feature is not supported on the device
Remarks
None.
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5.6.23.5.10.4 PLIB_SQI_ExistsBDPollCount Function
C
bool PLIB_SQI_ExistsBDPollCount(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDPollCount feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DMABDPollCounterSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDPollCount feature is supported on the device
• false - The BDPollCount feature is not supported on the device
Remarks
None.
5.6.23.5.10.5 PLIB_SQI_ExistsBDPollingEnable Function
C
bool PLIB_SQI_ExistsBDPollingEnable(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDPollingEnable feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_DMABDPollEnable
• PLIB_SQI_DMABDPollDisable
• PLIB_SQI_DMABDPollIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDPollingEnable feature is supported on the device
• false - The BDPollingEnable feature is not supported on the device
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Remarks
None.
5.6.23.5.10.6 PLIB_SQI_ExistsBDProcessState Function
C
bool PLIB_SQI_ExistsBDProcessState(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDProcessState feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_DMABDStateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDProcessState feature is supported on the device
• false - The BDProcessState feature is not supported on the device
Remarks
None.
5.6.23.5.10.7 PLIB_SQI_ExistsBDRxBufCount Function
C
bool PLIB_SQI_ExistsBDRxBufCount(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDRxBufCount feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DMABDReceiveBufferCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDRxBufCount feature is supported on the device
• false - The BDRxBufCount feature is not supported on the device
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Remarks
None.
5.6.23.5.10.8 PLIB_SQI_ExistsBDRxLength Function
C
bool PLIB_SQI_ExistsBDRxLength(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDRxLength feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DMABDReceiveBufferLengthGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDRxLength feature is supported on the device
• false - The BDRxLength feature is not supported on the device
Remarks
None.
5.6.23.5.10.9 PLIB_SQI_ExistsBDRxState Function
C
bool PLIB_SQI_ExistsBDRxState(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDRxState feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DMABDReceiveStateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDRxState feature is supported on the device
• false - The BDRxState feature is not supported on the device
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Remarks
None.
5.6.23.5.10.10 PLIB_SQI_ExistsBDTxBufCount Function
C
bool PLIB_SQI_ExistsBDTxBufCount(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDTxBufCount feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DMABDTransmitBufferCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDTxBufCount feature is supported on the device
• false - The BDTxBufCount feature is not supported on the device
Remarks
None.
5.6.23.5.10.11 PLIB_SQI_ExistsBDTxLength Function
C
bool PLIB_SQI_ExistsBDTxLength(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDTxLength feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DMABDTransmitBufferLengthGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDTxLength feature is supported on the device
• false - The BDTxLength feature is not supported on the device
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Remarks
None.
5.6.23.5.10.12 PLIB_SQI_ExistsBDTxState Function
C
bool PLIB_SQI_ExistsBDTxState(
SQI_MODULE_ID index
);
Description
This function identifies whether the BDTxState feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DMABDTransmitStateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDTxState feature is supported on the device
• false - The BDTxState feature is not supported on the device
Remarks
None.
5.6.23.5.10.13 PLIB_SQI_ExistsBurstControl Function
C
bool PLIB_SQI_ExistsBurstControl(
SQI_MODULE_ID index
);
Description
This function identifies whether the BurstControl feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_BurstEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BurstControl feature is supported on the device
• false - The BurstControl feature is not supported on the device
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Remarks
None.
5.6.23.5.10.14 PLIB_SQI_ExistsChipSelect Function
C
bool PLIB_SQI_ExistsChipSelect(
SQI_MODULE_ID index
);
Description
This function identifies whether the ChipSelect feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ChipSelectSet
• PLIB_SQI_ChipSelectGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ChipSelect feature is supported on the device
• false - The ChipSelect feature is not supported on the device
Remarks
None.
5.6.23.5.10.15 PLIB_SQI_ExistsClockControl Function
C
bool PLIB_SQI_ExistsClockControl(
SQI_MODULE_ID index
);
Description
This function identifies whether the ClockControl feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ClockEnable
• PLIB_SQI_ClockDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The ClockControl feature is supported on the device
• false - The ClockControl feature is not supported on the device
Remarks
None.
5.6.23.5.10.16 PLIB_SQI_ExistsClockDivider Function
C
bool PLIB_SQI_ExistsClockDivider(
SQI_MODULE_ID index
);
Description
This function identifies whether the ClockDivider feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ClockDividerSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ClockDivider feature is supported on the device
• false - The ClockDivider feature is not supported on the device
Remarks
None.
5.6.23.5.10.17 PLIB_SQI_ExistsClockReady Function
C
bool PLIB_SQI_ExistsClockReady(
SQI_MODULE_ID index
);
Description
This function identifies whether the ClockReady feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ClockIsStable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The ClockReady feature is supported on the device
• false - The ClockReady feature is not supported on the device
Remarks
None.
5.6.23.5.10.18 PLIB_SQI_ExistsConBufThreshold Function
C
bool PLIB_SQI_ExistsConBufThreshold(
SQI_MODULE_ID index
);
Description
This function identifies whether the ConBufThreshold feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_ControlBufferThresholdSet
• PLIB_SQI_ControlBufferThresholdGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ConBufThreshold feature is supported on the device
• false - The ConBufThreshold feature is not supported on the device
Remarks
None.
5.6.23.5.10.19 PLIB_SQI_ExistsConfigWord Function
C
bool PLIB_SQI_ExistsConfigWord(
SQI_MODULE_ID index
);
Description
This function identifies whether the ConfigWord feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ConfigWordSet
• PLIB_SQI_ConfigWordGet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ConfigWord feature is supported on the device
• false - The ConfigWord feature is not supported on the device
Remarks
None.
5.6.23.5.10.20 PLIB_SQI_ExistsControlWord Function
C
bool PLIB_SQI_ExistsControlWord(
SQI_MODULE_ID index
);
Description
This function identifies whether the ControlWord feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ControlWordSet
• PLIB_SQI_ControlWordGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ControlWord feature is supported on the device
• false - The ControlWord feature is not supported on the device
Remarks
None.
5.6.23.5.10.21 PLIB_SQI_ExistsCSDeassert Function
C
bool PLIB_SQI_ExistsCSDeassert(
SQI_MODULE_ID index
);
Description
This function identifies whether the CSDeassert feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ChipSelectDeassertEnable
• PLIB_SQI_ChipSelectDeassertDisable
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CSDeassert feature is supported on the device
• false - The CSDeassert feature is not supported on the device
Remarks
None.
5.6.23.5.10.22 PLIB_SQI_ExistsCSOutputEnable Function
C
bool PLIB_SQI_ExistsCSOutputEnable(
SQI_MODULE_ID index
);
Description
This function identifies whether the CSOutputEnable feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_CSOutputEnableSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CSOutputEnable feature is supported on the device
• false - The CSOutputEnable feature is not supported on the device
Remarks
None.
5.6.23.5.10.23 PLIB_SQI_ExistsDataFormat Function
C
bool PLIB_SQI_ExistsDataFormat(
SQI_MODULE_ID index
);
Description
This function identifies whether the DataFormat feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DataFormatSet
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• PLIB_SQI_DataFormatGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataFormat feature is supported on the device
• false - The DataFormat feature is not supported on the device
Remarks
None.
5.6.23.5.10.24 PLIB_SQI_ExistsDataModeControl Function
C
bool PLIB_SQI_ExistsDataModeControl(
SQI_MODULE_ID index
);
Description
This function identifies whether the DataModeControl feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_DataModeSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataModeControl feature is supported on the device
• false - The DataModeControl feature is not supported on the device
Remarks
None.
5.6.23.5.10.25 PLIB_SQI_ExistsDataOutputEnable Function
C
bool PLIB_SQI_ExistsDataOutputEnable(
SQI_MODULE_ID index
);
Description
This function identifies whether the DataOutputEnable feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_DataOutputEnableSelect
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataOutputEnable feature is supported on the device
• false - The DataOutputEnable feature is not supported on the device
Remarks
None.
5.6.23.5.10.26 PLIB_SQI_ExistsDataPinStatus Function
C
bool PLIB_SQI_ExistsDataPinStatus(
SQI_MODULE_ID index
);
Description
This function identifies whether the DataPinStatus feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DataLineStatus
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DataPinStatus feature is supported on the device
• false - The DataPinStatus feature is not supported on the device
Remarks
None.
5.6.23.5.10.27 PLIB_SQI_ExistsDmaEnable Function
C
bool PLIB_SQI_ExistsDmaEnable(
SQI_MODULE_ID index
);
Description
This function identifies whether the DMAEnable feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DMAEnable
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• PLIB_SQI_DMADisable
• PLIB_SQI_DMAIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DMAEnable feature is supported on the device
• false - The DMAEnable feature is not supported on the device
Remarks
None.
5.6.23.5.10.28 PLIB_SQI_ExistsDMAEngineBusy Function
C
bool PLIB_SQI_ExistsDMAEngineBusy(
SQI_MODULE_ID index
);
Description
This function identifies whether the DMAEngineBusy feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_DMABDIsBusy
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DMAEngineBusy feature is supported on the device
• false - The DMAEngineBusy feature is not supported on the device
Remarks
None.
5.6.23.5.10.29 PLIB_SQI_ExistsDMAProcessInProgress Function
C
bool PLIB_SQI_ExistsDMAProcessInProgress(
SQI_MODULE_ID index
);
Description
This function identifies whether the DMAProcessInProgress feature is available on the SQI module. When this function returns
true, these functions are supported on the device:
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• PLIB_SQI_DMAHasStarted
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DMAProcessInProgress feature is supported on the device
• false - The DMAProcessInProgress feature is not supported on the device
Remarks
None.
5.6.23.5.10.30 PLIB_SQI_ExistsEnableControl Function
C
bool PLIB_SQI_ExistsEnableControl(
SQI_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_Enable
• PLIB_SQI_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EnableControl feature is supported on the device
• false - The EnableControl feature is not supported on the device
Remarks
None.
5.6.23.5.10.31 PLIB_SQI_ExistsHoldPinControl Function
C
bool PLIB_SQI_ExistsHoldPinControl(
SQI_MODULE_ID index
);
Description
This function identifies whether the HoldPinControl feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
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• PLIB_SQI_HoldSet
• PLIB_SQI_HoldClear
• PLIB_SQI_HoldGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The HoldPinControl feature is supported on the device
• false - The HoldPinControl feature is not supported on the device
Remarks
None.
5.6.23.5.10.32 PLIB_SQI_ExistsInterruptControl Function
C
bool PLIB_SQI_ExistsInterruptControl(
SQI_MODULE_ID index
);
Description
This function identifies whether the InterruptControl feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_InterruptEnable
• PLIB_SQI_InterruptDisable
• PLIB_SQI_InterruptIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The InterruptControl feature is supported on the device
• false - The InterruptControl feature is not supported on the device
Remarks
None.
5.6.23.5.10.33 PLIB_SQI_ExistsInterruptSignalControl Function
C
bool PLIB_SQI_ExistsInterruptSignalControl(
SQI_MODULE_ID index
);
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Description
This function identifies whether the InterruptSignalControl feature is available on the SQI module. When this function returns
true, these functions are supported on the device:
• PLIB_SQI_InterruptSignalEnable
• PLIB_SQI_InterruptSignalDisable
• PLIB_SQI_InterruptSignalIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The InterruptSignalControl feature is supported on the device
• false - The InterruptSignalControl feature is not supported on the device
Remarks
None.
5.6.23.5.10.34 PLIB_SQI_ExistsInterruptStatus Function
C
bool PLIB_SQI_ExistsInterruptStatus(
SQI_MODULE_ID index
);
Description
This function identifies whether the InterruptStatus feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_InterruptFlagGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The InterruptStatus feature is supported on the device
• false - The InterruptStatus feature is not supported on the device
Remarks
None.
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5.6.23.5.10.35 PLIB_SQI_ExistsLaneMode Function
C
bool PLIB_SQI_ExistsLaneMode(
SQI_MODULE_ID index
);
Description
This function identifies whether the LaneMode feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_LaneModeSet
• PLIB_SQI_LaneModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LaneMode feature is supported on the device
• false - The LaneMode feature is not supported on the device
Remarks
None.
5.6.23.5.10.36 PLIB_SQI_ExistsReceiveLatch Function
C
bool PLIB_SQI_ExistsReceiveLatch(
SQI_MODULE_ID index
);
Description
This function identifies whether the ReceiveLatch feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ReceiveLatchEnable
• PLIB_SQI_ReceiveLatchDisable
• PLIB_SQI_ReceiveLatchGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiveLatch feature is supported on the device
• false - The ReceiveLatch feature is not supported on the device
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Remarks
None.
5.6.23.5.10.37 PLIB_SQI_ExistsRxBufferCount Function
C
bool PLIB_SQI_ExistsRxBufferCount(
SQI_MODULE_ID index
);
Description
This function identifies whether the RxBufferCount feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_NumberOfReceiveBufferReads
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RxBufferCount feature is supported on the device
• false - The RxBufferCount feature is not supported on the device
Remarks
None.
5.6.23.5.10.38 PLIB_SQI_ExistsRxBufIntThreshold Function
C
bool PLIB_SQI_ExistsRxBufIntThreshold(
SQI_MODULE_ID index
);
Description
This function identifies whether the RxBufIntThreshold feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_RxBufferThresholdIntSet
• PLIB_SQI_RxBufferThresholdIntGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RxBufIntThreshold feature is supported on the device
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• false - The RxBufIntThreshold feature is not supported on the device
Remarks
None.
5.6.23.5.10.39 PLIB_SQI_ExistsRxBufThreshold Function
C
bool PLIB_SQI_ExistsRxBufThreshold(
SQI_MODULE_ID index
);
Description
This function identifies whether the RxBufThreshold feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_RxBufferThresholdSet
• PLIB_SQI_RxBufferThresholdGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RxBufThreshold feature is supported on the device
• false - The RxBufThreshold feature is not supported on the device
Remarks
None.
5.6.23.5.10.40 PLIB_SQI_ExistsRxData Function
C
bool PLIB_SQI_ExistsRxData(
SQI_MODULE_ID index
);
Description
This function identifies whether the RxData feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ReceiveData
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RxData feature is supported on the device
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• false - The RxData feature is not supported on the device
Remarks
None.
5.6.23.5.10.41 PLIB_SQI_ExistsRxUnderRun Function
C
bool PLIB_SQI_ExistsRxUnderRun(
SQI_MODULE_ID index
);
Description
This function identifies whether the RxUnderRun feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ReceiveBufferIsUnderrun
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The RxUnderRun feature is supported on the device
• false - The RxUnderRun feature is not supported on the device
Remarks
None.
5.6.23.5.10.42 PLIB_SQI_ExistsSoftReset Function
C
bool PLIB_SQI_ExistsSoftReset(
SQI_MODULE_ID index
);
Description
This function identifies whether the SoftReset feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_SoftReset
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SoftReset feature is supported on the device
• false - The SoftReset feature is not supported on the device
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Remarks
None.
5.6.23.5.10.43 PLIB_SQI_ExistsStartDMA Function
C
bool PLIB_SQI_ExistsStartDMA(
SQI_MODULE_ID index
);
Description
This function identifies whether the StartDMA feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_DMABDFetchStart
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StartDMA feature is supported on the device
• false - The StartDMA feature is not supported on the device
Remarks
None.
5.6.23.5.10.44 PLIB_SQI_ExistsTransferCommand Function
C
bool PLIB_SQI_ExistsTransferCommand(
SQI_MODULE_ID index
);
Description
This function identifies whether the TransferCommand feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_TransferDirectionSet
• PLIB_SQI_TransferDirectionGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransferCommand feature is supported on the device
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• false - The TransferCommand feature is not supported on the device
Remarks
None.
5.6.23.5.10.45 PLIB_SQI_ExistsTransferCount Function
C
bool PLIB_SQI_ExistsTransferCount(
SQI_MODULE_ID index
);
Description
This function identifies whether the TransferCount feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_ByteCountSet
• PLIB_SQI_ByteCountGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransferCount feature is supported on the device
• false - The TransferCount feature is not supported on the device
Remarks
None.
5.6.23.5.10.46 PLIB_SQI_ExistsTransferModeControl Function
C
bool PLIB_SQI_ExistsTransferModeControl(
SQI_MODULE_ID index
);
Description
This function identifies whether the TransferModeControl feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_TransferModeSet
• PLIB_SQI_TransferModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The TransferModeControl feature is supported on the device
• false - The TransferModeControl feature is not supported on the device
Remarks
None.
5.6.23.5.10.47 PLIB_SQI_ExistsTxBufferFree Function
C
bool PLIB_SQI_ExistsTxBufferFree(
SQI_MODULE_ID index
);
Description
This function identifies whether the TxBufferFree feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_TransmitBufferFreeSpaceGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TxBufferFree feature is supported on the device
• false - The TxBufferFree feature is not supported on the device
Remarks
None.
5.6.23.5.10.48 PLIB_SQI_ExistsTxBufIntThreshold Function
C
bool PLIB_SQI_ExistsTxBufIntThreshold(
SQI_MODULE_ID index
);
Description
This function identifies whether the TxBufIntThreshold feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_TxBufferThresholdIntSet
• PLIB_SQI_TxBufferThresholdIntGet
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TxBufIntThreshold feature is supported on the device
• false - The TxBufIntThreshold feature is not supported on the device
Remarks
None.
5.6.23.5.10.49 PLIB_SQI_ExistsTxBufThreshold Function
C
bool PLIB_SQI_ExistsTxBufThreshold(
SQI_MODULE_ID index
);
Description
This function identifies whether the TxBufThreshold feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_TxBufferThresholdSet
• PLIB_SQI_TxBufferThresholdGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TxBufThreshold feature is supported on the device
• false - The TxBufThreshold feature is not supported on the device
Remarks
None.
5.6.23.5.10.50 PLIB_SQI_ExistsTxData Function
C
bool PLIB_SQI_ExistsTxData(
SQI_MODULE_ID index
);
Description
This function identifies whether the TxData feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_TransmitData
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TxData feature is supported on the device
• false - The TxData feature is not supported on the device
Remarks
None.
5.6.23.5.10.51 PLIB_SQI_ExistsTxOverFlow Function
C
bool PLIB_SQI_ExistsTxOverFlow(
SQI_MODULE_ID index
);
Description
This function identifies whether the TxOverFlow feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_TransmitBufferHasOverflowed
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TxOverFlow feature is supported on the device
• false - The TxOverFlow feature is not supported on the device
Remarks
None.
5.6.23.5.10.52 PLIB_SQI_ExistsWPPinControl Function
C
bool PLIB_SQI_ExistsWPPinControl(
SQI_MODULE_ID index
);
Description
This function identifies whether the WPPinControl feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_WriteProtectSet
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• PLIB_SQI_WriteProtectClear
• PLIB_SQI_WriteProtectGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WPPinControl feature is supported on the device
• false - The WPPinControl feature is not supported on the device
Remarks
None.
5.6.23.5.10.53 PLIB_SQI_ExistsXIPChipSelect Function
C
bool PLIB_SQI_ExistsXIPChipSelect(
SQI_MODULE_ID index
);
Description
This function identifies whether the XIPChipSelect feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_XIPChipSelectSet
• PLIB_SQI_XIPChipSelectGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The XIPChipSelect feature is supported on the device
• false - The XIPChipSelect feature is not supported on the device
Remarks
None.
5.6.23.5.10.54 PLIB_SQI_ExistsXIPControlWord1 Function
C
bool PLIB_SQI_ExistsXIPControlWord1(
SQI_MODULE_ID index
);
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Description
This function identifies whether the XIPControlWord1 feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_XIPControlWord1Set
• PLIB_SQI_XIPControlWord1Get
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The XIPControlWord1 feature is supported on the device
• false - The XIPControlWord1 feature is not supported on the device
Remarks
None.
5.6.23.5.10.55 PLIB_SQI_ExistsXIPControlWord2 Function
C
bool PLIB_SQI_ExistsXIPControlWord2(
SQI_MODULE_ID index
);
Description
This function identifies whether the XIPControlWord2 feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_XIPControlWord2Set
• PLIB_SQI_XIPControlWord2Get
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The XIPControlWord2 feature is supported on the device
• false - The XIPControlWord2 feature is not supported on the device
Remarks
None.
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5.6.23.5.10.56 PLIB_SQI_ExistsXIPLaneMode Function
C
bool PLIB_SQI_ExistsXIPLaneMode(
SQI_MODULE_ID index
);
Description
This function identifies whether the XIPLaneMode feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_XIPLaneModeSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The XIPLaneMode feature is supported on the device
• false - The XIPLaneMode feature is not supported on the device
Remarks
None.
5.6.23.5.10.57 PLIB_SQI_ExistsXIPModeBytes Function
C
bool PLIB_SQI_ExistsXIPModeBytes(
SQI_MODULE_ID index
);
Description
This function identifies whether the XIPModeBytes feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_XIPModeBytesSet
• PLIB_SQI_XIPModeBytesGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The XIPModeBytes feature is supported on the device
• false - The XIPModeBytes feature is not supported on the device
Remarks
None.
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5.6.23.5.10.58 PLIB_SQI_ExistsXIPModeCode Function
C
bool PLIB_SQI_ExistsXIPModeCode(
SQI_MODULE_ID index
);
Description
This function identifies whether the XIPModeCode feature is available on the SQI module. When this function returns true, these
functions are supported on the device:
• PLIB_SQI_XIPModeCodeSet
• PLIB_SQI_XIPModeCodeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The XIPModeCode feature is supported on the device
• false - The XIPModeCode feature is not supported on the device
Remarks
None.
5.6.23.5.10.59 PLIB_SQI_ExistsXIPNumberOfAddressBytes Function
C
bool PLIB_SQI_ExistsXIPNumberOfAddressBytes(
SQI_MODULE_ID index
);
Description
This function identifies whether the XIPNumberOfAddressBytes feature is available on the SQI module. When this function
returns true, these functions are supported on the device:
• PLIB_SQI_XIPAddressBytesSet
• PLIB_SQI_XIPAddressBytesGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The XIPNumberOfAddressBytes feature is supported on the device
• false - The XIPNumberOfAddressBytes feature is not supported on the device
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Remarks
None.
5.6.23.5.10.60 PLIB_SQI_ExistsXIPNumberOfDummyBytes Function
C
bool PLIB_SQI_ExistsXIPNumberOfDummyBytes(
SQI_MODULE_ID index
);
Description
This function identifies whether the XIPNumberOfDummyBytes feature is available on the SQI module. When this function
returns true, these functions are supported on the device:
• PLIB_SQI_XIPDummyBytesSet
• PLIB_SQI_XIPDummyBytesGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The XIPNumberOfDummyBytes feature is supported on the device
• false - The XIPNumberOfDummyBytes feature is not supported on the device
Remarks
None.
5.6.23.5.10.61 PLIB_SQI_ExistsXIPReadOpCode Function
C
bool PLIB_SQI_ExistsXIPReadOpCode(
SQI_MODULE_ID index
);
Description
This function identifies whether the XIPReadOpCode feature is available on the SQI module. When this function returns true,
these functions are supported on the device:
• PLIB_SQI_XIPReadOpcodeSet
• PLIB_SQI_XIPReadOpcodeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The XIPReadOpCode feature is supported on the device
• false - The XIPReadOpCode feature is not supported on the device
Remarks
None.
5.6.23.6 Files
Files
Name Description
plib_sqi.h SQI PLIB Interface Header for common definitions
Description
5.6.23.6.1 plib_sqi.h
SQI Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
SQI PLIB.
Functions
Name Description
PLIB_SQI_BurstEnable This bit sets the burst enable (BURSTEN) function for higher
throughput. This function is artifact of the system bus architecture.
PLIB_SQI_ByteCountGet Returns the current transmit/receive count.
PLIB_SQI_ByteCountSet Sets the transmit/receive count.
PLIB_SQI_ChipSelectDeassertDisable Clears the chip select de-assert.
PLIB_SQI_ChipSelectDeassertEnable Sets the chip select de-assert.
PLIB_SQI_ChipSelectGet Returns the chip select that is currently active.
PLIB_SQI_ChipSelectSet Activates the chip select.
PLIB_SQI_ClockDisable Disables the SQI transfer clock.
PLIB_SQI_ClockDividerGet Returns the SQI clock divider value.
PLIB_SQI_ClockDividerSet Sets the SQI clock (that drives the SQI protocol) divider value.
Divides the base clock to generate the SQI clock.
PLIB_SQI_ClockEnable Enables the SQI transfer clock.
PLIB_SQI_ClockIsStable Returns SQI transfer clock state.
PLIB_SQI_ConfigWordGet Get the SQI configuration word.
PLIB_SQI_ConfigWordSet Sets SQI Configuration Word.
PLIB_SQI_ControlBufferThresholdGet Returns the transmit buffer space in bytes.
PLIB_SQI_ControlBufferThresholdSet Sets the control buffer threshold value.
PLIB_SQI_ControlWordGet Get the SQI control word.
PLIB_SQI_ControlWordSet Sets SQI Control Word.
PLIB_SQI_CSOutputEnableSelect Selects the output enables on SQI chip select pins.
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PLIB_SQI_DataFormatGet Returns the data format to Least Significant Bit First or
LITTLE-ENDIAN.
PLIB_SQI_DataFormatSet Sets the data format to Least Significant Bit First or LITTLE-ENDIAN.
PLIB_SQI_DataLineStatus Returns the logical status of the SQI data lines.
PLIB_SQI_DataModeGet Returns the SQI data mode of operation (SPI Mode0/Mode3).
PLIB_SQI_DataModeSet Sets the SQI data mode of operation (SPI Mode0/Mode3/Serial
Flash).
PLIB_SQI_DataOutputEnableSelect Selects the output enables on SQI data outputs.
PLIB_SQI_Disable Disables the SQI module.
PLIB_SQI_DMABDBaseAddressGet Returns the address of the base buffer descriptor.
PLIB_SQI_DMABDBaseAddressSet Sets the address of the base buffer descriptor.
PLIB_SQI_DMABDControlWordGet Returns Current Buffer Descriptor Control Word Information.
PLIB_SQI_DMABDCurrentAddressGet Returns the address of the current buffer descriptor in process.
PLIB_SQI_DMABDFetchStart Start the DMA buffer descriptor fetch process.
PLIB_SQI_DMABDIsBusy Returns true if DMA Buffer Descriptor is busy.
PLIB_SQI_DMABDPollCounterSet Sets the poll counter value.
PLIB_SQI_DMABDPollDisable Disables the buffer descriptor polling.
PLIB_SQI_DMABDPollEnable Enables the buffer descriptor polling.
PLIB_SQI_DMABDPollIsEnabled Returns true if DAM buffer descriptor poll is eanbled and false if it's
disabled.
PLIB_SQI_DMABDReceiveBufferCountGet Returns the receive buffer space in bytes.
PLIB_SQI_DMABDReceiveBufferLengthGet Returns the receive length in bytes.
PLIB_SQI_DMABDReceiveStateGet Returns the current state of the buffer descriptor in progress.
PLIB_SQI_DMABDStateGet Returns the current state of the buffer descriptor in progress.
PLIB_SQI_DMABDTransmitBufferCountGet Returns the transmit buffer space in bytes.
PLIB_SQI_DMABDTransmitBufferLengthGet Returns the transmit length in bytes.
PLIB_SQI_DMABDTransmitStateGet Returns the current state of the buffer descriptor in progress.
PLIB_SQI_DMADisable Disables the built-in DMA logic.
PLIB_SQI_DMAEnable Enables the built-in DMA logic.
PLIB_SQI_DMAHasStarted Returns true if DMA process has started if not returns false.
PLIB_SQI_DMAIsEnabled Returns true if DAM is eanbled and false if it's disabled.
PLIB_SQI_Enable Enables the SQI module.
PLIB_SQI_ExistsBDBaseAddress Identifies whether the BDBaseAddress feature exists on the SQI
module
PLIB_SQI_ExistsBDControlWord Identifies whether the BDControlWord feature exists on the SQI
module
PLIB_SQI_ExistsBDCurrentAddress Identifies whether the BDCurrentAddress feature exists on the SQI
module
PLIB_SQI_ExistsBDPollCount Identifies whether the BDPollCount feature exists on the SQI module
PLIB_SQI_ExistsBDPollingEnable Identifies whether the BDPollingEnable feature exists on the SQI
module
PLIB_SQI_ExistsBDProcessState Identifies whether the BDProcessState feature exists on the SQI
module
PLIB_SQI_ExistsBDRxBufCount Identifies whether the BDRxBufCount feature exists on the SQI
module
PLIB_SQI_ExistsBDRxLength Identifies whether the BDRxLength feature exists on the SQI module
PLIB_SQI_ExistsBDRxState Identifies whether the BDRxState feature exists on the SQI module
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PLIB_SQI_ExistsBDTxBufCount Identifies whether the BDTxBufCount feature exists on the SQI
module
PLIB_SQI_ExistsBDTxLength Identifies whether the BDTxLength feature exists on the SQI module
PLIB_SQI_ExistsBDTxState Identifies whether the BDTxState feature exists on the SQI module
PLIB_SQI_ExistsBurstControl Identifies whether the BurstControl feature exists on the SQI module
PLIB_SQI_ExistsChipSelect Identifies whether the ChipSelect feature exists on the SQI module
PLIB_SQI_ExistsClockControl Identifies whether the ClockControl feature exists on the SQI module
PLIB_SQI_ExistsClockDivider Identifies whether the ClockDivider feature exists on the SQI module
PLIB_SQI_ExistsClockReady Identifies whether the ClockReady feature exists on the SQI module
PLIB_SQI_ExistsConBufThreshold Identifies whether the ConBufThreshold feature exists on the SQI
module
PLIB_SQI_ExistsConfigWord Identifies whether the ConfigWord feature exists on the SQI module
PLIB_SQI_ExistsControlWord Identifies whether the ControlWord feature exists on the SQI module
PLIB_SQI_ExistsCSDeassert Identifies whether the CSDeassert feature exists on the SQI module
PLIB_SQI_ExistsCSOutputEnable Identifies whether the CSOutputEnable feature exists on the SQI
module
PLIB_SQI_ExistsDataFormat Identifies whether the DataFormat feature exists on the SQI module
PLIB_SQI_ExistsDataModeControl Identifies whether the DataModeControl feature exists on the SQI
module
PLIB_SQI_ExistsDataOutputEnable Identifies whether the DataOutputEnable feature exists on the SQI
module
PLIB_SQI_ExistsDataPinStatus Identifies whether the DataPinStatus feature exists on the SQI
module
PLIB_SQI_ExistsDmaEnable Identifies whether the DMAEnable feature exists on the SQI module
PLIB_SQI_ExistsDMAEngineBusy Identifies whether the DMAEngineBusy feature exists on the SQI
module
PLIB_SQI_ExistsDMAProcessInProgress Identifies whether the DMAProcessInProgress feature exists on the
SQI module
PLIB_SQI_ExistsEnableControl Identifies whether the EnableControl feature exists on the SQI
module
PLIB_SQI_ExistsHoldPinControl Identifies whether the HoldPinControl feature exists on the SQI
module
PLIB_SQI_ExistsInterruptControl Identifies whether the InterruptControl feature exists on the SQI
module
PLIB_SQI_ExistsInterruptSignalControl Identifies whether the InterruptSignalControl feature exists on the
SQI module
PLIB_SQI_ExistsInterruptStatus Identifies whether the InterruptStatus feature exists on the SQI
module
PLIB_SQI_ExistsLaneMode Identifies whether the LaneMode feature exists on the SQI module
PLIB_SQI_ExistsReceiveLatch Identifies whether the ReceiveLatch feature exists on the SQI
module
PLIB_SQI_ExistsRxBufferCount Identifies whether the RxBufferCount feature exists on the SQI
module
PLIB_SQI_ExistsRxBufIntThreshold Identifies whether the RxBufIntThreshold feature exists on the SQI
module
PLIB_SQI_ExistsRxBufThreshold Identifies whether the RxBufThreshold feature exists on the SQI
module
PLIB_SQI_ExistsRxData Identifies whether the RxData feature exists on the SQI module
PLIB_SQI_ExistsRxUnderRun Identifies whether the RxUnderRun feature exists on the SQI module
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PLIB_SQI_ExistsSoftReset Identifies whether the SoftReset feature exists on the SQI module
PLIB_SQI_ExistsStartDMA Identifies whether the StartDMA feature exists on the SQI module
PLIB_SQI_ExistsTransferCommand Identifies whether the TransferCommand feature exists on the SQI
module
PLIB_SQI_ExistsTransferCount Identifies whether the TransferCount feature exists on the SQI
module
PLIB_SQI_ExistsTransferModeControl Identifies whether the TransferModeControl feature exists on the
SQI module
PLIB_SQI_ExistsTxBufferFree Identifies whether the TxBufferFree feature exists on the SQI module
PLIB_SQI_ExistsTxBufIntThreshold Identifies whether the TxBufIntThreshold feature exists on the SQI
module
PLIB_SQI_ExistsTxBufThreshold Identifies whether the TxBufThreshold feature exists on the SQI
module
PLIB_SQI_ExistsTxData Identifies whether the TxData feature exists on the SQI module
PLIB_SQI_ExistsTxOverFlow Identifies whether the TxOverFlow feature exists on the SQI module
PLIB_SQI_ExistsWPPinControl Identifies whether the WPPinControl feature exists on the SQI
module
PLIB_SQI_ExistsXIPChipSelect Identifies whether the XIPChipSelect feature exists on the SQI
module
PLIB_SQI_ExistsXIPControlWord1 Identifies whether the XIPControlWord1 feature exists on the SQI
module
PLIB_SQI_ExistsXIPControlWord2 Identifies whether the XIPControlWord2 feature exists on the SQI
module
PLIB_SQI_ExistsXIPLaneMode Identifies whether the XIPLaneMode feature exists on the SQI
module
PLIB_SQI_ExistsXIPModeBytes Identifies whether the XIPModeBytes feature exists on the SQI
module
PLIB_SQI_ExistsXIPModeCode Identifies whether the XIPModeCode feature exists on the SQI
module
PLIB_SQI_ExistsXIPNumberOfAddressBytes Identifies whether the XIPNumberOfAddressBytes feature exists on
the SQI module
PLIB_SQI_ExistsXIPNumberOfDummyBytes Identifies whether the XIPNumberOfDummyBytes feature exists on
the SQI module
PLIB_SQI_ExistsXIPReadOpCode Identifies whether the XIPReadOpCode feature exists on the SQI
module
PLIB_SQI_HoldClear This bit clears the hold function to be disabled on SQID3 in single
and dual lane modes.
PLIB_SQI_HoldGet This bit gets the status of HOLD function on SQID3 pin.
PLIB_SQI_HoldSet This bit sets the hold function to be enabled on SQID3 in single or
dual lane modes.
PLIB_SQI_InterruptDisable Disables the interrupt source.
PLIB_SQI_InterruptEnable Enables the interrupt source passed.
PLIB_SQI_InterruptFlagGet Return SQI Interrupt flag status.
PLIB_SQI_InterruptIsEnabled Returns the interrupt state (eanbled/disabled).
PLIB_SQI_InterruptSignalDisable Disables the interrupt signal source.
PLIB_SQI_InterruptSignalEnable Enables the interrupt signal source passed.
PLIB_SQI_InterruptSignalIsEnabled Returns the interrupt signal state (eanbled/disabled).
PLIB_SQI_LaneModeGet Returns the lane mode (single/dual/quad).
PLIB_SQI_LaneModeSet Sets the data lane mode (single/dual/quad).
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PLIB_SQI_NumberOfReceiveBufferReads Returns the number of receive buffer reads.
PLIB_SQI_ReceiveBufferIsUnderrun Returns the status of receive buffer.
PLIB_SQI_ReceiveData Reads the data from the receive buffer.
PLIB_SQI_ReceiveLatchDisable Disables the receive latch so receive data is discarded when in
transmit mode.
PLIB_SQI_ReceiveLatchEnable Enable the receive latch so receive data is latched during transmit
mode.
PLIB_SQI_ReceiveLatchGet Returns the receive latch status in transmit mode.
PLIB_SQI_RxBufferThresholdGet Returns the receive command threshold.
PLIB_SQI_RxBufferThresholdIntGet Sets the receive buffer threshold interrupt.
PLIB_SQI_RxBufferThresholdIntSet Sets the receive buffer threshold for interrupt.
PLIB_SQI_RxBufferThresholdSet Sets the receive command threshold.
PLIB_SQI_SoftReset This bit issues a soft reset to the SQI module.
PLIB_SQI_TransferDirectionGet Returns the transfer command.
PLIB_SQI_TransferDirectionSet Sets the transfer command.
PLIB_SQI_TransferModeGet Returns the SQI transfer mode (PIO/DMA/XIP) of operation.
PLIB_SQI_TransferModeSet Sets the SQI transfer mode (PIO/DMA/XIP) of operation.
PLIB_SQI_TransmitBufferFreeSpaceGet Returns the number of transmit buffer words available.
PLIB_SQI_TransmitBufferHasOverflowed Returns the current status of the transmit buffer.
PLIB_SQI_TransmitData Writes data into the SQI transmit buffer.
PLIB_SQI_TxBufferThresholdGet Returns the transmit command threshold value.
PLIB_SQI_TxBufferThresholdIntGet Returns the value to tigger the transmit buffer threshold interrupt.
PLIB_SQI_TxBufferThresholdIntSet Sets the value to tigger the transmit buffer threshold interrupt.
PLIB_SQI_TxBufferThresholdSet Sets the transmit command threshold.
PLIB_SQI_WriteProtectClear This bit clears the Write-Protect function to be disabled on SQID2 in
single or dual lane modes.
PLIB_SQI_WriteProtectGet This bit gets the Write-Protect state of Write_Protect Feature on
SQID2.
PLIB_SQI_WriteProtectSet This bit sets the Write-Protect function to be enabled on SQID2 in
single or dual Lane modes only.
PLIB_SQI_XIPAddressBytesGet Returns the number of address bytes.
PLIB_SQI_XIPAddressBytesSet Sets the number of address bytes.
PLIB_SQI_XIPChipSelectGet Returns the current active chip select.
PLIB_SQI_XIPChipSelectSet Activates the chip select in XIP mode.
PLIB_SQI_XIPControlWord1Get Get the XIP mode control word 1.
PLIB_SQI_XIPControlWord1Set Sets the XIP mode control word 1.
PLIB_SQI_XIPControlWord2Get Get the XIP mode control word 2.
PLIB_SQI_XIPControlWord2Set Sets the XIP mode control word 2.
PLIB_SQI_XIPDummyBytesGet Sets the number of dummy bytes.
PLIB_SQI_XIPDummyBytesSet Sets the number of dummy bytes.
PLIB_SQI_XIPLaneModeGet Returns the lane (single/dual/quad) mode in XIP mode.
PLIB_SQI_XIPLaneModeSet Selects the lane (Single/Dual/Quad) mode for different transaction in
XIP mode.
PLIB_SQI_XIPModeBytesGet Returns the number of bytes used for mode code command.
PLIB_SQI_XIPModeBytesSet Allocates the bytes for mode code command.
PLIB_SQI_XIPModeCodeGet Returns the mode code op-code.
PLIB_SQI_XIPModeCodeSet Sets the mode code command.
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PLIB_SQI_XIPReadOpcodeGet Returns the read opcode in XIP mode.
PLIB_SQI_XIPReadOpcodeSet Sets the read opcode in XIP mode.
File Name
plib_sqi.h
Company
Microchip Technology Inc.
5.6.24 Timer Peripheral Library
5.6.24.1 Introduction
Timer Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Timer module on the Microchip family of microcontrollers with a convenient C
language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the
module's registers, thereby hiding differences from one microcontroller variant to another.
Description
Overview of Timers
The timer function is one of the basic features of a microcontroller. Timers are useful for generating accurate time-based periodic
interrupts for software application or real-time operating systems. Other uses include counting external pulses or accurate timing
measurement of external events using the timer's gate functions or producing precise time delays. Some timers can also be used
to control timing of other peripherals.
5.6.24.2 Release Notes
MPLAB Harmony Version: v0.70b Timer Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
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Nothing to report in this release.
5.6.24.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED AS IS MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.24.4 Using the Library
This topic describes the basic architecture of the Timer Peripheral Library and provides information and examples on how to use
it.
Interface Header File: plib_tmr.h
The interface to the Timer Peripheral Library is defined in the "plib_tmr.h" header file. Any C language source (.c) file that uses
the Timer Peripheral Library must include "plib_tmr.h".
Library File:
The Timer Peripheral Library is part of the processor-specific peripheral library archive (.a) file installed with the compiler.
Libraries in this archive are automatically available to the linker (in the default search path) for any project built using the
Microchip compiler.
5.6.24.4.1 Hardware Abstraction Model
This library provides the low-level abstraction of the Timer module on the Microchip family of microcontrollers with a convenient
C language interface. This topic describes how that abstraction is modeled in the software and introduces the library interface.
Note: The interface provided is a superset of all the functionality of the available timers on the device. Refer to the specific
device data sheet or related family reference manual to determine the set of functions that are supported for each Timer module
on your device.
Description
Microchip timers can be classified as:
• Overflow-based
• Period match-based
These timers are essentially counters of a specific size (8-, 16-, or 32-bits wide) that increment based on the clock cycle and the
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timer prescaler. An application can monitor these counters to determine how much time has elapsed.
The prescaler determines the timer granularity (resolution). It is a mechanism for generating the clock for the timer by the CPU
clock. Every CPU has a clock source and the frequency of this source decides the rate at which instructions are executed by the
processor. Most of the timers have the option of providing input clock prescalers, while some have the optional postscalers. The
prescaler is used to divide the clock frequency of the Timer module and produce a clock for the timer.
Each timer can be configured with a different source (internal or external) meaning, the source of the timer’s input clock is
selectable. Both internal and external sources are available, depending on the part in use, with some timers providing a clock
synchronization mechanisms with reference to external source.
On some timers the clock edge, either the rising or the falling edge, on which the increment occurs, is selectable.
Overflow-based Timers
Overflow-based timers provide timer outputs or generate interrupts after a rollover from the maximum possible timer count.
Overflow Timer Abstraction Diagram
An overflow interrupt is triggered whenever the timer register overflows (i.e., reaches its maximum value based on its size as
depicted by the following diagram).
Period Match-based Timers
Period match-based timers provide the timer outputs or generate interrupts upon a match between the counter's count value
against the preprogrammed period.
Period Match timer Abstraction Diagram
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Gated Time Accumulation/Gated Control Mode
The Gated Time Accumulation/Gate control mode allows the internal timer to increment based upon the duration of the high time
applied to the timer input pin. In the Gated Time Accumulation mode, the timer clock source is derived from the internal system
clock. When the input clock pin state is high, the timer will count up until a period match has occurred, or the input pin state is
changed to a low state. A pin state transition from high-to-low will trigger an interrupt.
A period/compare match interrupt is issued by a timer whenever the value of the timer becomes equal to a certain predefined
value as depicted by the following diagram,
5.6.24.4.2 Library Overview
The library interface routines are divided into various subsections, each of the sub-sections addresses one of the blocks or the
overall operation of the Timer module.
Library Interface Section Description
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5.6.24.4.3 How the Library Works
Timer modules can operate in the following modes:
• Synchronous Clock Counter
• Synchronous External Clock Counter
• Asynchronous External Clock Counter
• Gated Timer
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine availability.
5.6.24.4.3.1 Synchronous Internal Clock Counter
This section provides information and examples for setting up Synchronous Internal Clock Counter operation.
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes for your device.
Description
Synchronous Clock Counter operation provides the following capabilities:
• Elapsed time measurements
• Time delays
• Periodic timer interrupts
Setup
Use the following steps for synchronous internal clock counter setup:
1. Some timer modules support multiple resolutions, which can be selected using PLIB_TMR_Mode8BitEnable,
PLIB_TMR_Mode16BitEnable, or PLIB_TMR_Mode32BitEnable.
2. Set the start value of the timer using PLIB_TMR_Counter8BitSet and PLIB_TMR_Counter16BitSet and
PLIB_TMR_Counter32BitSet.
3. The period register value can be set using PLIB_TMR_Period8BitSet, PLIB_TMR_Period16BitSet or
PLIB_TMR_Period32BitSet. Use the appropriate function based on the resolution of the timer.
4. Clear the timer register using PLIB_TMR_Counter8BitClear, PLIB_TMR_Counter16BitClear, or
PLIB_TMR_Counter32BitClear.
5. In this mode, the input clock source for the timer is the internal clock, and is selected using PLIB_TMR_ClockSourceSelect,
depending on which clock is used as the internal clock in the timer module of the device.
6. The prescaler for the clock can be selected using PLIB_TMR_PrescaleSelect. Pass in the desired prescaler into the function
from the enumeration TMR_PRESCALE.
7. Timer count is incremented on the rising timer clock edge. On some microcontrollers, this is can be changed using
PLIB_TMR_ClockSourceEdgeSelect. with the appropriate parameter for the falling edge (i.e., increment on high-to-low).
8. On some microcontrollers, the timer output can go through a postscaler. The postscaler can be configured using
PLIB_TMR_PostscaleSelect.
9. Start the timer once the setup is complete using PLIB_TMR_Start. The timer operation can be stopped using PLIB_TMR_Stop.
Example: Synchronous Counter (Internal Clock) Setup
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the application
// developer.
// Stop the timer
PLIB_TMR_Stop(MY_TIMER_INSTANCE);
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// Set the prescaler, and set the clock source as internal
PLIB_TMR_PrescaleSelect(MY_TIMER_INSTANCE, TMR_PRESCALE_TMRX_VALUE_1);
PLIB_TMR_ClockSourceSelect(MY_TIMER_INSTANCE, TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK);
// Clear the timer
PLIB_TMR_Counter16BitClear(MY_TIMER_INSTANCE);
// Load the period register
PLIB_TMR_Period16BitSet(MY_TIMER_INSTANCE, 0xFFFF);
// Start the timer
PLIB_TMR_Start(MY_TIMER_INSTANCE);
Timer interrupt is generated if enabled, when the timer count matches the period value if available, or when the counter
overflows.
Example: Changing Counter Value During Timer Operation
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the application
// developer.
uint16_t timer_value;
// Clear the timer
timer_value = PLIB_TMR_Counter16BitGet(MY_TIMER_INSTANCE);
if(timer_value > 0x0ff0)
{
PLIB_TMR_Counter16BitSet(MY_TIMER_INSTANCE, 0x000a);
}
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes for your device.
5.6.24.4.3.2 Synchronous External Clock Counter
This section provides information and examples for Synchronous External Clock Clock Counter operation.
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes for your device.
Description
Synchronous external clock counter operation provides the following capabilities:
• Counting periodic or non-periodic pulses
• Use external clock as time base for timers
Setup
Use the following steps for synchronous external clock counter setup:
1. Some timer modules support multiple resolutions, which can be selected using PLIB_TMR_Mode8BitEnable,
PLIB_TMR_Mode16BitEnable, or PLIB_TMR_Mode32BitEnable.
2. The period register value can be set using PLIB_TMR_Period8BitSet, PLIB_TMR_Period16BitSet, or
PLIB_TMR_Period32BitSet. Use the appropriate function based on the resolution of the timer.
3. Set the start value of the timer using PLIB_TMR_Counter8BitSet , PLIB_TMR_Counter16BitSet, or
PLIB_TMR_Counter32BitSet.
4. Some timer modules, can select an external clock as its input source. Use PLIB_TMR_ClockSourceSelect to select the
external clock source.
5. The clock source is synchronized with the internal clock for synchronous operation. Use
PLIB_TMR_ClockSourceExternalSyncEnable to synchronize the external clock source.
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6. The prescaler for the clock can be selected using PLIB_TMR_PrescaleSelect. Pass in the desired prescaler into the function
from the enumeration TMR_PRESCALE.
7. Timer count is incremented on the rising timer clock edge. On some microcontrollers, this is can be changed using
PLIB_TMR_ClockSourceEdgeSelect, with the appropriate parameter for the falling edge (i.e., increment on high-to-low).
8. On some microcontrollers, the timer output can go through a postscaler. The postscaler can be configured using
PLIB_TMR_PostscaleSelect.
9. Clear the timer register using PLIB_TMR_Counter8BitClear, PLIB_TMR_Counter16BitClea, or PLIB_TMR_Counter32BitClear.
10. Start the timer once the setup is complete using PLIB_TMR_Start. The timer operation can be stopped using
PLIB_TMR_Stop.
Example: Synchronous Counter (External Clock) Setup
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the application
// developer.
// Stop the timer
PLIB_TMR_Stop(MY_TIMER_INSTANCE);
// Set the prescaler, and set the clock source as external and enable synchronization
PLIB_TMR_PrescaleSelect(MY_TIMER_INSTANCE, TMR_PRESCALE_VALUE_256);
PLIB_TMR_ClockSourceSelect(MY_TIMER_INSTANCE, TMR_CLOCK_SOURCE_EXTERNAL_INPUT_PIN);
PLIB_TMR_ClockSourceExternalSyncEnable(MY_TIMER_INSTANCE);
// Clear the timer
PLIB_TMR_Counter16BitClear(MY_TIMER_INSTANCE);
// Load the period register
PLIB_TMR_Period16BitSet(MY_TIMER_INSTANCE, 0xFFFF);
// Start the timer
PLIB_TMR_Start(MY_TIMER_INSTANCE);
A timer interrupt is generated if enabled, when the timer count matches the period value if available, or when the counter
overflows.
Example: Changing Counter Value During Timer Operation
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the application
// developer.
uint16_t timer_value;
// read the current timer value
timer_value = PLIB_TMR_Counter16BitGet(MY_TIMER_INSTANCE);
if(timer_value > 0x0ff0)
{
PLIB_TMR_Counter16BitSet(MY_TIMER_INSTANCE, 0x000a);
}
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes for your device.
5.6.24.4.3.3 Asynchronous Counter
This section provides information and examples for setting up Asynchronous Counter operation.
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes for your device.
Description
Asynchronous Counter operation provides the following capabilities:
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• The timer can operate in Sleep mode and can generate an interrupt on a period match
• The processor can wake up from Sleep on the timer interrupt
• The timer can be clocked from the Secondary Oscillator for real-time clock applications
Setup
Use the following steps for Asynchronous Counter setup:
1. Some timer modules support multiple resolutions, which can be selected using PLIB_TMR_Mode8BitEnable,
PLIB_TMR_Mode16BitEnable, or PLIB_TMR_Mode32BitEnable.
2. The period register value can be set using PLIB_TMR_Period8BitSet, PLIB_TMR_Period16BitSet, or
PLIB_TMR_Period32BitSet. Use the appropriate function based on the resolution of the timer.
3. Set the start value of the timer using PLIB_TMR_Counter8BitSet, PLIB_TMR_Counter16BitSet, and
PLIB_TMR_Counter32BitSet.
4. Some timer modules can select an external clock as its input source. Use PLIB_TMR_ClockSourceSelect to select the
external clock source.
5. For Asynchronous mode operation, the clock source is not synchronized with the internal clock. Use
PLIB_TMR_ClockSourceExternalSyncDisable to disable the synchronization of the external clock source.
6. The prescaler for the clock can be selected using PLIB_TMR_PrescaleSelect. Pass in the desired prescaler into the function
from the enumeration TMR_PRESCALE.
7. Timer count is incremented on the rising timer clock edge. On some microcontrollers, this is can be changed using
PLIB_TMR_ClockSourceEdgeSelect, with the appropriate parameter for the falling edge (i.e., increment on high-to-low).
8. On some microcontrollers, the timer output can go through a postscaler. The postscaler can be configured using
PLIB_TMR_PostscaleSelect.
9. Clear the timer register using PLIB_TMR_Counter8BitClear, PLIB_TMR_Counter16BitClear, or
PLIB_TMR_Counter32BitClear.
10. Start the timer once the setup is complete using PLIB_TMR_Start. The timer operation can be stopped using
PLIB_TMR_Stop.
Example: Asynchronous Counter Setup
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the application
// developer.
// Stop the timer
PLIB_TMR_Stop(MY_TIMER_INSTANCE);
// Set the prescaler, and set the clock source as external and disable synchronization
PLIB_TMR_PrescaleSelect(MY_TIMER_INSTANCE, TMR_PRESCALE_VALUE_64);
PLIB_TMR_ClockSourceSelect(MY_TIMER_INSTANCE, TMR_CLOCK_SOURCE_EXTERNAL_INPUT_PIN);
PLIB_TMR_ClockSourceExternalSyncDisable(MY_TIMER_INSTANCE);
// Clear the timer
PLIB_TMR_Counter16BitClear(MY_TIMER_INSTANCE);
// Load the period register
PLIB_TMR_Period16BitSet(MY_TIMER_INSTANCE, 0x7F);
// Start the timer
PLIB_TMR_Start(MY_TIMER_INSTANCE);
A timer interrupt is generated if enabled, when the timer count matches the period value if available, or when the counter
overflows.
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes for your device.
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5.6.24.4.3.4 Gated Timer
This section provides information and examples for setting up Gated Timer operation.
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes for your device.
Description
Gated Timer operation can be used to allow measurement of an external signal.
Setup
Use the following steps for Gated Timer setup:
1. Some timer modules support multiple resolutions, which can be selected using PLIB_TMR_Mode8BitEnable,
PLIB_TMR_Mode16BitEnable, or PLIB_TMR_Mode32BitEnable.
2. The period register value can be set using PLIB_TMR_Period8BitSet, PLIB_TMR_Period16BitSet, or
PLIB_TMR_Period32BitSet. Use the appropriate function based on the resolution of the timer.
3. Set the start value of the timer using PLIB_TMR_Counter8BitSet, PLIB_TMR_Counter16BitSet, and
PLIB_TMR_Counter32BitSet.
4. In this mode, the input clock source for the timer is the internal clock, and is selected using PLIB_TMR_ClockSourceSelect,
depending on which clock is used as the internal clock in the timer module of the device.
5. The prescaler for the clock can be selected using PLIB_TMR_PrescaleSelect. Pass in the desired pre scaler into the function
from the enumeration TMR_PRESCALE.
6. Timer count is incremented on the rising timer clock edge. On some microcontrollers, this is can be changed using
PLIB_TMR_ClockSourceEdgeSelect, with the appropriate parameter for the falling edge (i.e., increment on high-to-low).
7. On some microcontrollers, the timer output can go through a postscaler. The postscaler can be configured using
PLIB_TMR_PostscaleSelect.
8. Clear the timer register using PLIB_TMR_Counter8BitClear, PLIB_TMR_Counter16BitClear, or
PLIB_TMR_Counter32BitClear.
9. Gated operation can be enabled using the function PLIB_TMR_GateEnable.
10. On some devices, additional gate functionality can be controlled:
• Gate Polarity: To allow the timer to count when the gate signal is high, use PLIB_TMR_GatePolaritySelect with the
parameter TMR_GATE_POLARITY_ACTIVE_HIGH. To allow the timer to count when the gate signal is low, use
PLIB_TMR_GatePolaritySelect with the parameter TMR_GATE_POLARITY_ACTIVE_LOW.
• Gate Toggle mode: To allow the timer to measure the full cycle length of gate signal as opposed to the duration of a single
pulse level, use PLIB_TMR_GateToggleModeEnable. To disable this mode, use PLIB_TMR_GateToggleModeDisable.
• Gate Single Pulse mode: To allow the timer to capture a single pulse gate event, use
PLIB_TMR_GateSinglePulseModeEnable and PLIB_TMR_GateSinglePulseModeDisable. The single pulse acquisition can
be started using PLIB_TMR_GateSinglePulseAcquisitionStart, and its status can be read using
PLIB_TMR_GateSinglePulseAcquisitionHasCompleted.
• Additionally, the current state of the gate can be obtained using PLIB_TMR_GateCurrentStateGet
• The gate source can be selected using PLIB_TMR_GateSourceSelect, using one of the possible values from
TMR_GATE_SOURCE
11. Start the timer once the setup is complete using PLIB_TMR_Start. The timer operation can be stopped using
PLIB_TMR_Stop.
Example 1: Gated Timer Setup
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the application
// developer.
// Stop the timer
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PLIB_TMR_Stop(MY_TIMER_INSTANCE);
// Set the prescaler, and set the clock source as external and disable synchronization
PLIB_TMR_PrescaleSelect(MY_TIMER_INSTANCE, TMR_PRESCALE_VALUE_64);
PLIB_TMR_ClockSourceSelect(MY_TIMER_INSTANCE, TMR_CLOCK_SOURCE_EXTERNAL_INPUT_PIN);
PLIB_TMR_ClockSourceExternalSyncDisable(MY_TIMER_INSTANCE);
// Clear the timer
PLIB_TMR_Counter16BitClear(MY_TIMER_INSTANCE);
// Load the period register
PLIB_TMR_Period16BitSet(MY_TIMER_INSTANCE, 0x7F00);
// Enable the gate timer
PLIB_TMR_GateEnable(MY_TIMER_INSTANCE);
// Start the timer
PLIB_TMR_Start(MY_TIMER_INSTANCE);
Example 2: Gated Timer Setup
// Stop the timer
uint8_t pulse_width;
PLIB_TMR_Stop(MY_TIMER_INSTANCE);
// Set the prescaler, and set the clock source as external and disable synchronization
PLIB_TMR_PrescaleSelect(MY_TIMER_INSTANCE, TMR_PRESCALE_VALUE_64);
PLIB_TMR_ClockSourceExternalInputClockEnable(MY_TIMER_INSTANCE);
PLIB_TMR_ClockSourceExternalSyncDisable(MY_TIMER_INSTANCE);
// Clear the timer
PLIB_TMR_Counter16BitClear(MY_TIMER_INSTANCE);
// Load the period register
PLIB_TMR_Period16BitSet(MY_TIMER_INSTANCE, 0x7F00);
// Enable the gate timer
PLIB_TMR_GateEnable(MY_TIMER_INSTANCE);
// Gate source selection
PLIB_TMR_GateSourceSelect(MY_TIMER_INSTANCE, TMR_GATE_SOURCE_T1_GATE);
// Start the timer
PLIB_TMR_Start(MY_TIMER_INSTANCE);
// Single pulse acquisition start
PLIB_TMR_GateSinglePulseAcquisitionStart(MY_TIMER_INSTANCE);
// Counting enabled on the rising edge
PLIB_TMR_GatePolaritySelect(MY_TMR_INSTANCE, TMR_GATE_POLARITY_ACTIVE_HIGH);
// Gate pulse mode enabled
PLIB_TMR_GateSinglePulseModeEnable(MY_TIMER_INSTANCE);
A timer interrupt is generated if enabled, on the falling edge of the gate signal. Refer to the specific device data sheet to
determine whether this feature is available for your device.
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes for your device.
5.6.24.4.3.5 Other Features
This section provides information on additional features.
Description
Each of the following modes can additionally support some or all of the features listed. Please refer to the specific device data
sheet or family reference manual for details.
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Operation During Sleep Mode
When the Timer module is configured to operate in Asynchronous mode (with an external clock source), it will continue to
increment each timer clock (or prescale multiple of clocks) during Sleep mode.
On some devices, Timer operation during Sleep mode can be disabled using PLIB_TMR_OperateInSleepDisable, and can be
enabled using PLIB_TMR_OperateInSleepEnable.
Operation During Idle Mode
A Timer module can continue to operate in Idle mode by calling PLIB_TMR_StopInIdleDisable, or can stop operation in Idle
mode by calling PLIB_TMR_StopInIdleEnable.
Event Trigger Reset
If the PWM modules are configured to use a Timer module, a special event trigger can be generated in Compare mode. The
trigger can reset the the timer modules. If supported by the device, the special event trigger reset can be enabled using
PLIB_TMR_TriggerEventResetEnable, or disabled using PLIB_TMR_TriggerEventResetDisable.
To be able to use this feature, the Timer module must be configured in one of the synchronous modes.
Timer Mode Control
• PLIB_TMR_Mode8BitEnable - For PIC18 timers, This interface disables 16-bit mode and enables 8-bit mode
• PLIB_TMR_Mode16BitEnable:
• For PIC18 timers, This interface disables 8-bit mode and enables 16-bit mode
• For PIC24/PIC32 timers, this interface enables 16-bit mode and disables 32-bit mode
• PLIB_TMR_Mode32BitEnable - For PIC24/PIC32 timers, this interface enables 32-bit mode and disables 16-bit mode
Timer Usage Mode
Some timers operate in either Period Match mode or Overflow mode. The mode state can be retrieved from the Timer Peripheral
Library using IsPeriodMatchBased. This function returns 'true' Period Match mode and 'false' for Overflow mode.
Timer Prescaler Information
Prescaler divisor information associated with the respective prescaler value selected through TMR_PRESCALE can be retrieved
through PLIB_TMR_PrescaleDivisorGet.
The true prescaler value can be obtained by using PLIB_TMR_PrescaleGet.
Timer Postscaler Information
Postscaler divisor information associated with the respective postscaler value is selected through the enumeration
TMR_POSTSCALE, and can be retrieved through PLIB_TMR_PostscaleDivisorGet.
The true postscaler value can be obtained by using PLIB_TMR_PostscaleGet.
Timer Source Edge Information
The TMR source edge information can be retrieved using PLIB_TMR_ClockSourceEdgeGet.
5.6.24.4.4 Configuring the Library
The library is configured for the supported Timer modules when the processor is chosen in the MPLAB IDE.
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5.6.24.5 Library Interface
Data Types and Constants
Name Description
TMR_ASSIGNMENT Data type defining the Timer assignment to modules.
TMR_CLOCK_SOURCE Data type defining the different clock sources.
TMR_CLOCK_SOURCE_EDGE Data type defining the different source edges.
TMR_GATE_POLARITY Data type defining the different gate polarities.
TMR_GATE_SOURCE Data type defining the different gate source selections.
TMR_MODULE_ID Identifies the supported Timer modules.
TMR_POSTSCALE Defines the list of possible postscaler values.
TMR_PRESCALE Defines the list of possible prescaler values.
Clock Source Control Functions
Name Description
PLIB_TMR_ClockSourceEdgeGet Gets the source edge information.
PLIB_TMR_ClockSourceEdgeSelect Selects the input clock source edge.
PLIB_TMR_ClockSourceExternalSyncDisable Disables the clock synchronization of the external input.
PLIB_TMR_ClockSourceExternalSyncEnable Enables the clock synchronization of the external input.
PLIB_TMR_ClockSourceSelect Selects the clock source.
Counter Control Functions
Name Description
PLIB_TMR_Counter16BitClear Clears the 16-bit timer value.
PLIB_TMR_Counter16BitGet Gets the 16-bit timer value.
PLIB_TMR_Counter16BitSet Sets the 16-bit timer value.
PLIB_TMR_Counter32BitClear Clears the 32-bit timer value.
PLIB_TMR_Counter32BitGet Gets the 32-bit timer value.
PLIB_TMR_Counter32BitSet Sets the 32-bit timer value.
PLIB_TMR_Counter8BitClear Clears the 8-bit timer value.
PLIB_TMR_Counter8BitGet Gets the 8-bit timer value.
PLIB_TMR_Counter8BitSet Sets the 8-bit timer value.
PLIB_TMR_CounterAsyncWriteDisable Disables the writes to the counter register until the pending write
operation completes.
PLIB_TMR_CounterAsyncWriteEnable Enables back-to-back writes with legacy asynchronous timer
functionality.
PLIB_TMR_CounterAsyncWriteInProgress Returns the status of the counter write in Asynchronous mode.
Feature Existence Functions
Name Description
PLIB_TMR_ExistsClockSource Identifies whether the ClockSource feature exists on the Timer
module.
PLIB_TMR_ExistsClockSourceEdge Identifies whether the ClockSourceEdge feature exists on the
Timer module.
PLIB_TMR_ExistsClockSourceSync Identifies whether the ClockSourceSync feature exists on the
Timer module.
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PLIB_TMR_ExistsCounter16Bit Identifies whether the Counter16Bit feature exists on the Timer
module.
PLIB_TMR_ExistsCounter32Bit Identifies whether the Counter32Bit feature exists on the Timer
module.
PLIB_TMR_ExistsCounter8Bit Identifies whether the Counter8bit feature exists on the Timer
module.
PLIB_TMR_ExistsCounterAsyncWriteControl Identifies whether the CounterAsyncWriteControl feature exists
on the Timer module.
PLIB_TMR_ExistsCounterAsyncWriteInProgress Identifies whether the CounterAsyncWriteInProgress feature
exists on the Timer module.
PLIB_TMR_ExistsCountMode Identifies whether the CountMode feature exists on the Timer
module.
PLIB_TMR_ExistsEnableControl Identifies whether the EnableControl feature exists on the Timer
module.
PLIB_TMR_ExistsGateCurrentState Identifies whether the GateCurrentState feature exists on the
Timer module.
PLIB_TMR_ExistsGatedTimeAccumulation Identifies whether the GatedTimeAccumulation feature exists on
the Timer module.
PLIB_TMR_ExistsGatePolarity Identifies whether the GatePolarity feature exists on the Timer
module.
PLIB_TMR_ExistsGateSinglePulseAcqusition Identifies whether the GateSinglePulseAcquisition feature exists
on the Timer module.
PLIB_TMR_ExistsGateSinglePulseMode Identifies whether the GateSinglePulseMode feature exists on
the Timer module.
PLIB_TMR_ExistsGateSource Identifies whether the GateSource feature exists on the Timer
module.
PLIB_TMR_ExistsGateToggleMode Identifies whether the GateToggleMode feature exists on the
Timer module.
PLIB_TMR_ExistsMode16Bit Identifies whether the Mode16Bit feature exists on the Timer
module.
PLIB_TMR_ExistsMode32Bit Identifies whether the Mode32Bit feature exists on the Timer
module.
PLIB_TMR_ExistsMode8Bit Identifies whether the Mode8Bit feature exists on the Timer
module.
PLIB_TMR_ExistsOperationInSleep Identifies whether the OperationInSleep feature exists on the
Timer module.
PLIB_TMR_ExistsPeriod16Bit Identifies whether the Period16Bit feature exists on the Timer
module.
PLIB_TMR_ExistsPeriod32Bit Identifies whether the Period32Bit feature exists on the Timer
module.
PLIB_TMR_ExistsPeriod8Bit Identifies whether the Period8Bit feature exists on the Timer
module.
PLIB_TMR_ExistsPostscale Identifies whether the Postscale feature exists on the Timer
module.
PLIB_TMR_ExistsPrescale Identifies whether the Prescale feature exists on the Timer
module.
PLIB_TMR_ExistsPrescalerAssignment Identifies whether the PrescalerControl feature exists on the
Timer module.
PLIB_TMR_ExistsStopInIdleControl Identifies whether the StopInIdle feature exists on the Timer
module.
PLIB_TMR_ExistsSystemClockStatus Identifies whether the SystemClockStatus feature exists on the
Timer module.
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PLIB_TMR_ExistsTimerAssignment Identifies whether the TimerAssignment feature exists on the
Timer module.
PLIB_TMR_ExistsTimerOperationMode Identifies whether the TimerOperationMode feature exists on the
Timer module.
PLIB_TMR_ExistsTimerOscillator Identifies whether the TimerOscillator feature exists on the Timer
module.
PLIB_TMR_ExistsTriggerEventReset Identifies whether the TriggerEventReset feature exists on the
Timer module.
Gate Control Functions
Name Description
PLIB_TMR_GateCurrentStateGet Returns the current level of the timer gate.
PLIB_TMR_GateDisable Enables counting regardless of the corresponding timer
gate function.
PLIB_TMR_GateEnable Enables counting controlled by the corresponding gate
function.
PLIB_TMR_GatePolaritySelect Selects the timer gate polarity.
PLIB_TMR_GateSinglePulseAcquisitionHasCompleted Returns the gate single pulse acquisition status.
PLIB_TMR_GateSinglePulseAcquisitionStart Starts the gate single pulse acquisition.
PLIB_TMR_GateSinglePulseModeDisable Disables Single Pulse mode.
PLIB_TMR_GateSinglePulseModeEnable Enables Single pulse mode and the controlling
corresponding timer gate.
PLIB_TMR_GateSourceSelect Selects the timer gate source.
PLIB_TMR_GateToggleModeDisable Disables the Gate Toggle mode.
PLIB_TMR_GateToggleModeEnable Enables the Gate Toggle mode.
General Setup Functions
Name Description
PLIB_TMR_AssignmentSelect Assigns the specified Timer(s) to the selected modules.
PLIB_TMR_ContinousCountModeEnable Enables Continous Count mode
PLIB_TMR_Mode16BitEnable Enables the Timer module for 16-bit operation and disables all other
modes.
PLIB_TMR_Mode32BitEnable Enables 32-bit operation on the Timer module combination.
PLIB_TMR_Mode8BitEnable Enables the Timer module in 8-bit operation mode and disables 16-bit
mode.
PLIB_TMR_Start Starts/enables the indexed timer.
PLIB_TMR_Stop Stops/disables the indexed timer.
PLIB_TMR_TimerOscillatorDisable Disables the oscillator associated with the Timer module.
PLIB_TMR_TimerOscillatorEnable Enables the oscillator associated with the Timer module.
PLIB_TMR_TriggerEventResetDisable Disables the special event trigger reset.
PLIB_TMR_TriggerEventResetEnable Enables the special event trigger reset.
PLIB_TMR_SingleShotModeEnable Enables Single-shot mode.
Miscellaneous Functions
Name Description
PLIB_TMR_IsPeriodMatchBased Gets the operating mode state of the Timer module based on Period
Match or Overflow mode.
PLIB_TMR_SystemClockFromTimerIsActive Gets the system clock status.
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Period Control Functions
Name Description
PLIB_TMR_Period16BitGet Gets the 16-bit period value.
PLIB_TMR_Period16BitSet Sets the 16-bit period value.
PLIB_TMR_Period32BitGet Gets the 32-bit period value.
PLIB_TMR_Period32BitSet Sets the 32-bit period value.
PLIB_TMR_Period8BitGet Gets the 8-bit period value.
PLIB_TMR_Period8BitSet Sets the 8-bit period value.
Post-processing Functions
Name Description
PLIB_TMR_PostscaleDivisorGet Gets the postscaler divisor information.
PLIB_TMR_PostscaleGet Gets the postscaler divisor information.
PLIB_TMR_PostscaleSelect Selects the output clock postscaler.
Power Control Functions
Name Description
PLIB_TMR_OperateInSleepDisable Disables Timer module operation when the device is in Sleep mode.
PLIB_TMR_OperateInSleepEnable Enables Timer module operation when the device is in Sleep mode.
PLIB_TMR_StopInIdleDisable Continue module operation when the device enters Idle mode.
PLIB_TMR_StopInIdleEnable Discontinues module operation when the device enters Idle mode.
Preprocessing Functions
Name Description
PLIB_TMR_PrescaleDivisorGet Gets the prescaler divisor information.
PLIB_TMR_PrescaleGet Gets the prescaler information.
PLIB_TMR_PrescalerDisable Disables the prescaler assignment to the indexed Timer module.
PLIB_TMR_PrescalerEnable Enables the prescaler assignment to the indexed Timer module.
PLIB_TMR_PrescaleSelect Selects the clock prescaler.
Description
This section lists and describes the functions, data types, and constants available in the Timer Peripheral Library.
5.6.24.5.1 General Setup Functions
5.6.24.5.1.1 PLIB_TMR_AssignmentSelect Function
C
void PLIB_TMR_AssignmentSelect(
TMR_MODULE_ID index,
TMR_ASSIGNMENT tmrNums
);
Description
This function assigns the specified Timer(s) as the clock source for the selected modules.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
tmrNums One of the possible values of TMR_ASSIGNMENT
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsTimerAssignment in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_AssignmentSelect(MY_TMR_INSTANCE, TMR_ASSIGNMENT_T1_TO_CCP_ALL);
5.6.24.5.1.2 PLIB_TMR_ContinousCountModeEnable Function
C
void PLIB_TMR_ContinousCountModeEnable(
TMR_MODULE_ID index
);
Description
This function enables Continous Count mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCountMode in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_ContinousCountModeEnable(MY_TMR_INSTANCE);
5.6.24.5.1.3 PLIB_TMR_Mode16BitEnable Function
C
void PLIB_TMR_Mode16BitEnable(
TMR_MODULE_ID index
);
Description
This function enables the Timer module for 16-bit operation and disables all other modes.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Calling this function disables the operation of the Timer module 8-bit mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsMode16Bit in your application to determine whether this feature is available.
For PIC18 Timers, this function disables 8-bit mode and enables 16-bit mode. For PIC24/PIC32 TMRs, this function enables
16-bit mode and disables 32-bit mode.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Mode16BitEnable(MY_TMR_INSTANCE);
5.6.24.5.1.4 PLIB_TMR_Mode32BitEnable Function
C
void PLIB_TMR_Mode32BitEnable(
TMR_MODULE_ID index
);
Description
This function enables the Timer module and the index +1 Timer module to act as one 32-bit timer module and disables all other
modes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsMode32Bit in your application to determine whether this feature is available.
For PIC24/PIC32 Timers, this function enables 32-bit mode and disables 16-bit mode.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Mode32BitEnable(MY_TMR_INSTANCE);
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5.6.24.5.1.5 PLIB_TMR_Mode8BitEnable Function
C
void PLIB_TMR_Mode8BitEnable(
TMR_MODULE_ID index
);
Description
This function enables the Timer module in 8-bit operation mode and disables 16-bit mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Calling this function disables the operation of Timer module in 16-bit mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsMode8Bit in your application to determine whether this feature is available.
For PIC18 Timers, this function disables 16-bit mode and enables 8-bit mode.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Mode8BitEnable(MY_TMR_INSTANCE);
5.6.24.5.1.6 PLIB_TMR_Start Function
C
void PLIB_TMR_Start(
TMR_MODULE_ID index
);
Description
This function starts/enables the indexed timer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_TMR_ExistsEnableControl in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Start(MY_TMR_INSTANCE);
5.6.24.5.1.7 PLIB_TMR_Stop Function
C
void PLIB_TMR_Stop(
TMR_MODULE_ID index
);
Description
This function stops/disables the indexed timer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsEnableControl in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Stop(MY_TMR_INSTANCE);
5.6.24.5.1.8 PLIB_TMR_TimerOscillatorDisable Function
C
void PLIB_TMR_TimerOscillatorDisable(
TMR_MODULE_ID index
);
Description
This function disables the oscillator associated with the Timer module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsTimerOscillator in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_TimerOscillatorDisable(MY_TMR_INSTANCE);
5.6.24.5.1.9 PLIB_TMR_TimerOscillatorEnable Function
C
void PLIB_TMR_TimerOscillatorEnable(
TMR_MODULE_ID index
);
Description
This function enables the oscillator associated with the Timer module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsTimerOscillator in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_TimerOscillatorEnable(MY_TMR_INSTANCE);
5.6.24.5.1.10 PLIB_TMR_TriggerEventResetDisable Function
C
void PLIB_TMR_TriggerEventResetDisable(
TMR_MODULE_ID index
);
Description
This function disables the special event trigger reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsTriggerEventReset in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_TriggerEventResetDisable(MY_TMR_INSTANCE);
5.6.24.5.1.11 PLIB_TMR_TriggerEventResetEnable Function
C
void PLIB_TMR_TriggerEventResetEnable(
TMR_MODULE_ID index
);
Description
This function enables the special event trigger reset.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsTriggerEventReset in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_TriggerEventResetEnable(MY_TMR_INSTANCE);
5.6.24.5.1.12 PLIB_TMR_SingleShotModeEnable Function
C
void PLIB_TMR_SingleShotModeEnable(
TMR_MODULE_ID index
);
Description
This function enables Single-shot mode.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCountMode in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_SingleShotModeEnable(MY_TMR_INSTANCE);
5.6.24.5.2 Power Control Functions
5.6.24.5.2.1 PLIB_TMR_OperateInSleepDisable Function
C
void PLIB_TMR_OperateInSleepDisable(
TMR_MODULE_ID index
);
Description
This function disables Timer module operation when the device is in Sleep mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsOperationInSleep in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_OperateInSleepDisable(MY_TMR_INSTANCE);
5.6.24.5.2.2 PLIB_TMR_OperateInSleepEnable Function
C
void PLIB_TMR_OperateInSleepEnable(
TMR_MODULE_ID index
);
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Description
This function enables Timer module operation when the device is in Sleep mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsOperationInSleep in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_OperateInSleepEnable(MY_TMR_INSTANCE);
5.6.24.5.2.3 PLIB_TMR_StopInIdleDisable Function
C
void PLIB_TMR_StopInIdleDisable(
TMR_MODULE_ID index
);
Description
This function continues module operation when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsStopInIdleControl in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_StopInIdleDisable(MY_TMR_INSTANCE);
5.6.24.5.2.4 PLIB_TMR_StopInIdleEnable Function
C
void PLIB_TMR_StopInIdleEnable(
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TMR_MODULE_ID index
);
Description
This function discontinues module operation when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsStopInIdleControl in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the // application developer.
PLIB_TMR_StopInIdleEnable(MY_TMR_INSTANCE);
5.6.24.5.3 Clock Source Control Functions
5.6.24.5.3.1 PLIB_TMR_ClockSourceEdgeGet Function
C
TMR_CLOCK_SOURCE_EDGE PLIB_TMR_ClockSourceEdgeGet(
TMR_MODULE_ID index
);
Description
This function gets the input clock source edge information.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
One of the possible values of TMR_CLOCK_SOURCE_EDGE.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsClockSourceEdge in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
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TMR_CLOCK_SOURCE_EDGE source;
source = PLIB_TMR_ClockSourceEdgeGet(MY_TMR_INSTANCE);
5.6.24.5.3.2 PLIB_TMR_ClockSourceEdgeSelect Function
C
void PLIB_TMR_ClockSourceEdgeSelect(
TMR_MODULE_ID index,
TMR_CLOCK_SOURCE_EDGE source
);
Description
This function selects the input clock source edge, which could either be high-to-low (falling edge) or low-to-high (rising edge).
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
source One of the possible values of TMR_CLOCK_SOURCE_EDGE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsClockSourceEdge in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_ClockSourceEdgeSelect(MY_TMR_INSTANCE,
TMR_CLOCK_SOURCE_EDGE_INCREMENT_ON_LOW_TO_HIGH);
5.6.24.5.3.3 PLIB_TMR_ClockSourceExternalSyncDisable Function
C
void PLIB_TMR_ClockSourceExternalSyncDisable(
TMR_MODULE_ID index
);
Description
This function disables the clock synchronization of the external input.
Preconditions
The timer module must be configured to use the external clock using the function PLIB_TMR_ClockSourceSelect with the clock
source as TMR_CLOCK_SOURCE_EXTERNAL_INPUT_PIN. If the function PLIB_TMR_ClockSourceSelect configures the
clock with some other enumeration, this function will have no effect.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsClockSourceSync in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_ClockSourceExternalSyncDisable(MY_TMR_INSTANCE);
5.6.24.5.3.4 PLIB_TMR_ClockSourceExternalSyncEnable Function
C
void PLIB_TMR_ClockSourceExternalSyncEnable(
TMR_MODULE_ID index
);
Description
This function enables the clock synchronization of the external input.
Preconditions
The timer module must be configured to use the external clock using the function PLIB_TMR_ClockSourceSelect with the clock
source as TMR_CLOCK_SOURCE_EXTERNAL_INPUT_PIN. If the function PLIB_TMR_ClockSourceSelect configures the
clock with some other enumeration, this function will have no effect.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsClockSourceSync in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_ClockSourceExternalSyncEnable(MY_TMR_INSTANCE);
5.6.24.5.3.5 PLIB_TMR_ClockSourceSelect Function
C
void PLIB_TMR_ClockSourceSelect(
TMR_MODULE_ID index,
TMR_CLOCK_SOURCE source
);
Description
This function selects the clock source.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
source One of the possible values of TMR_CLOCK_SOURCE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGateSource in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_ClockSourceSelect(MY_TMR_INSTANCE, TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK);
5.6.24.5.4 Gate Control Functions
5.6.24.5.4.1 PLIB_TMR_GateCurrentStateGet Function
C
bool PLIB_TMR_GateCurrentStateGet(
TMR_MODULE_ID index
);
Description
This function returns the current level of the timer gate. The gate value is set for the entire duration of the clock count whether it
is a single pulse or a full clock cycle.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Acquisition has started
• false - Acquisition has completed or has not been started
Remarks
This feature is not affected by PLIB_TMR_GateEnable or PLIB_TMR_GateDisable.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGateCurrentState in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
bool gatestate = PLIB_TMR_GateCurrentStateGet(MY_TMR_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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5.6.24.5.4.2 PLIB_TMR_GateDisable Function
C
void PLIB_TMR_GateDisable(
TMR_MODULE_ID index
);
Description
This function enables counting regardless of the gate function.
Preconditions
The timer must be enabled for this function to take effect.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGatedTimeAccumulation in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_GateDisable(MY_TMR_INSTANCE);
5.6.24.5.4.3 PLIB_TMR_GateEnable Function
C
void PLIB_TMR_GateEnable(
TMR_MODULE_ID index
);
Description
This function enables counting controlled by the gate function.
Preconditions
The timer must be enabled, for this function to take effect.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGatedTimeAccumulation in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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// application developer.
PLIB_TMR_GateEnable(MY_TMR_INSTANCE);
5.6.24.5.4.4 PLIB_TMR_GatePolaritySelect Function
C
void PLIB_TMR_GatePolaritySelect(
TMR_MODULE_ID index,
TMR_GATE_POLARITY polarity
);
Description
This function selects the timer gate polarity.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
polarity One of the possible values of TMR_GATE_POLARITY
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGatePolarity in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_GatePolaritySelect(MY_TMR_INSTANCE, TMR_GATE_POLARITY_ACTIVE_HIGH);
5.6.24.5.4.5 PLIB_TMR_GateSinglePulseAcquisitionHasCompleted Function
C
bool PLIB_TMR_GateSinglePulseAcquisitionHasCompleted(
TMR_MODULE_ID index
);
Description
This function returns the gate single pulse acquisition status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Acquisition is waiting for an edge
• false - Acquisition has completed or has not been started
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGateSinglePulseAcqusition in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
bool isComplete;
isComplete = PLIB_TMR_GateSinglePulseAcquisitionHasCompleted(MY_TMR_INSTANCE);
5.6.24.5.4.6 PLIB_TMR_GateSinglePulseAcquisitionStart Function
C
void PLIB_TMR_GateSinglePulseAcquisitionStart(
TMR_MODULE_ID index
);
Description
This function starts the gate single pulse acquisition feature.
Preconditions
PLIB_TMR_GateSinglePulseModeEnable should be called before this function.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGateSinglePulseAcqusition in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_GateSinglePulseAcquisitionStart(MY_TMR_INSTANCE);
5.6.24.5.4.7 PLIB_TMR_GateSinglePulseModeDisable Function
C
void PLIB_TMR_GateSinglePulseModeDisable(
TMR_MODULE_ID index
);
Description
This function disables Single Pulse mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
5-3040
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGateSinglePulseMode in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_GateSinglePulseModeDisable(MY_TMR_INSTANCE);
5.6.24.5.4.8 PLIB_TMR_GateSinglePulseModeEnable Function
C
void PLIB_TMR_GateSinglePulseModeEnable(
TMR_MODULE_ID index
);
Description
This function enables Single pulse mode and the controlling corresponding timer gate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGateSinglePulseMode in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_GateSinglePulseModeEnable(MY_TMR_INSTANCE);
5.6.24.5.4.9 PLIB_TMR_GateSourceSelect Function
C
void PLIB_TMR_GateSourceSelect(
TMR_MODULE_ID index,
TMR_GATE_SOURCE source
);
Description
This function selects the timer gate source.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
source One of the possible values of TMR_GATE_SOURCE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGateSource in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_GateSourceSelect(MY_TMR_INSTANCE, TMR_GATE_SOURCE_CMP1_SYNC_OUTPUT);
5.6.24.5.4.10 PLIB_TMR_GateToggleModeDisable Function
C
void PLIB_TMR_GateToggleModeDisable(
TMR_MODULE_ID index
);
Description
This function disables Gate Toggle mode and the toggle flip flop is cleared.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGateToggleMode in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_GateToggleModeDisable(MY_TMR_INSTANCE);
5.6.24.5.4.11 PLIB_TMR_GateToggleModeEnable Function
C
void PLIB_TMR_GateToggleModeEnable(
TMR_MODULE_ID index
);
Description
This function enables Gate Toggle mode.
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
5-3042
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsGateToggleMode in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_GateToggleModeEnable(MY_TMR_INSTANCE);
5.6.24.5.5 Preprocessing Functions
5.6.24.5.5.1 PLIB_TMR_PrescaleDivisorGet Function
C
uint16_t PLIB_TMR_PrescaleDivisorGet(
TMR_MODULE_ID index,
TMR_PRESCALE prescale
);
Description
This function gets the prescaler divisor information.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
prescale One of the possible values of TMR_PRESCALE
Returns
prescale divisor value
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPrescale in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
uint16_t div = PLIB_TMR_PrescaleDivisorGet (MY_TMR_INSTANCE, TMR_PRESCALE_VALUE_1);
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5.6.24.5.5.2 PLIB_TMR_PrescaleGet Function
C
TMR_PRESCALE PLIB_TMR_PrescaleGet(
TMR_MODULE_ID index
);
Description
This function gets the prescaler information.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
One of the possible values of TMR_PRESCALE
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPrescale in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
TMR_PRESCALE prescale;
prescale = PLIB_TMR_PrescaleGet (MY_TMR_INSTANCE);
5.6.24.5.5.3 PLIB_TMR_PrescalerDisable Function
C
void PLIB_TMR_PrescalerDisable(
TMR_MODULE_ID index
);
Description
This function disables the prescaler assignment to the indexed Timer module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPrescalerAssignment in your application to determine whether this feature is available.
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Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_PrescalerDisable(MY_TMR_INSTANCE);
5.6.24.5.5.4 PLIB_TMR_PrescalerEnable Function
C
void PLIB_TMR_PrescalerEnable(
TMR_MODULE_ID index
);
Description
This function enables the prescaler assignment to the indexed Timer module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPrescalerAssignment in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_PrescalerEnable(MY_TMR_INSTANCE);
5.6.24.5.5.5 PLIB_TMR_PrescaleSelect Function
C
void PLIB_TMR_PrescaleSelect(
TMR_MODULE_ID index,
TMR_PRESCALE prescale
);
Description
This function selects the clock prescaler.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
prescale One of the possible values of TMR_PRESCALE
Returns
None.
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPrescale in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_PrescaleSelect(MY_TMR_INSTANCE, TMR_PRESCALE_VALUE_8);
5.6.24.5.6 Period Control Functions
5.6.24.5.6.1 PLIB_TMR_Period16BitGet Function
C
uint16_t PLIB_TMR_Period16BitGet(
TMR_MODULE_ID index
);
Description
This function gets the 16-bit period value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
period - 16-bit period value
Remarks
The timer period register may be written at any time before the timer is started or after the timer is stopped. The timer period
register can also be written when servicing the interrupt for the timer. When the timer is in operation, it is not recommended to
write to the period register.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPeriod16Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
uint16_t period = PLIB_TMR_Period16BitGet(MY_TMR_INSTANCE);
5.6.24.5.6.2 PLIB_TMR_Period16BitSet Function
C
void PLIB_TMR_Period16BitSet(
TMR_MODULE_ID index,
uint16_t period
);
Description
This function sets the 16-bit period value.
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
5-3046
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
period 16-bit period register value
Returns
None.
Remarks
The timer period register may be written at any time before the timer is started or after the timer is stopped. The timer period
register can also be written when servicing the interrupt for the timer. When the timer is in operation, it is not recommended to
write to the period register.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPeriod16Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
// where, MY_PERIOD_VALUE is the 16-bit value which needs to be stored in the
// period register.
PLIB_TMR_Period16BitSet(MY_TMR_INSTANCE, MY_PERIOD_VALUE);
5.6.24.5.6.3 PLIB_TMR_Period32BitGet Function
C
uint32_t PLIB_TMR_Period32BitGet(
TMR_MODULE_ID index
);
Description
This function gets the 32-bit period value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
period - 32-bit period value
Remarks
The timer period register may be written at any time before the timer is started or after the timer is stopped. The timer period
register can also be written when servicing the interrupt for the timer. When the timer is in operation, it is not recommended to
write to the period register.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPeriod32Bit in your application to determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
5-3047
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
uint32_t period = PLIB_TMR_Period32BitGet(MY_TMR_INSTANCE);
5.6.24.5.6.4 PLIB_TMR_Period32BitSet Function
C
void PLIB_TMR_Period32BitSet(
TMR_MODULE_ID index,
uint32_t period
);
Description
This function sets the 32-bit period value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
period 32-bit period register value
Returns
None.
Remarks
The timer period register may be written at any time before the timer is started or after the timer is stopped. The timer period
register can also be written when servicing the interrupt for the timer. When the timer is in operation, it is not recommended to
write to the period register.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPeriod32Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
// where, MY_PERIOD_VALUE is the 32-bit value which needs to be stored in the
// period register.
PLIB_TMR_Period32BitSet(MY_TMR_INSTANCE, MY_PERIOD_VALUE);
5.6.24.5.6.5 PLIB_TMR_Period8BitGet Function
C
uint8_t PLIB_TMR_Period8BitGet(
TMR_MODULE_ID index
);
Description
This function gets the 8 -it period value.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
5-3048
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
period - 8-bit period value
Remarks
The timer period register may be written at any time before the timer is started or after the timer is stopped. The timer period
register can also be written when servicing the interrupt for the timer. When the timer is in operation, it is not recommended to
write to the period register.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPeriod8Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
uint8_t period = PLIB_TMR_Period8BitGet(MY_TMR_INSTANCE);
5.6.24.5.6.6 PLIB_TMR_Period8BitSet Function
C
void PLIB_TMR_Period8BitSet(
TMR_MODULE_ID index,
uint8_t period
);
Description
This function sets the 8-bit period value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
period 8-bit period value
Returns
None.
Remarks
The timer period register may be written at any time before the timer is started or after the timer is stopped. The timer period
register can also be written when servicing the interrupt for the timer. When the timer is in operation, it is not recommended to
write to the period register.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPeriod8Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
// where, MY_PERIOD_VALUE is the 8-bit value which needs to be stored in the
// period register.
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PLIB_TMR_Period8BitSet(MY_TMR_INSTANCE, MY_PERIOD_VALUE);
5.6.24.5.7 Counter Control Functions
5.6.24.5.7.1 PLIB_TMR_Counter16BitClear Function
C
void PLIB_TMR_Counter16BitClear(
TMR_MODULE_ID index
);
Description
This function clears the 16-bit timer value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
When the timer register is written, the timer increment does not occur for that cycle. Writes to the timer register in the
asynchronous counter mode should be avoided.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounter16Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Counter16BitClear(MY_TMR_INSTANCE);
5.6.24.5.7.2 PLIB_TMR_Counter16BitGet Function
C
uint16_t PLIB_TMR_Counter16BitGet(
TMR_MODULE_ID index
);
Description
This function gets the 16-bit timer value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
16-bit timer value.
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Remarks
PLIB_TMR_Counter16BitGet does not prevent the timer from incrementing during the same instruction cycle.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounter16Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
uint16_t timerValue = PLIB_TMR_Counter16BitGet(MY_TMR_INSTANCE);
5.6.24.5.7.3 PLIB_TMR_Counter16BitSet Function
C
void PLIB_TMR_Counter16BitSet(
TMR_MODULE_ID index,
uint16_t value
);
Description
This function sets the 16-bit timer value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
value 16-bit value to be set
Returns
None.
Remarks
When the timer register is written to, the timer increment does not occur for that cycle. Writes to the timer register in the
asynchronous counter mode should be avoided.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounter16Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Counter16BitSet(MY_TMR_INSTANCE, 0x100);
5.6.24.5.7.4 PLIB_TMR_Counter32BitClear Function
C
void PLIB_TMR_Counter32BitClear(
TMR_MODULE_ID index
);
Description
This function clears the 32-bit timer value.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
When the timer register is written, the timer increment does not occur for that cycle. Writes to the timer register in the
asynchronous counter mode should be avoided.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounter32Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Counter32BitClear(MY_TMR_INSTANCE);
5.6.24.5.7.5 PLIB_TMR_Counter32BitGet Function
C
uint32_t PLIB_TMR_Counter32BitGet(
TMR_MODULE_ID index
);
Description
This function gets the 32-bit timer value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
32 bit timer value.
Remarks
PLIB_TMR_Counter32BitGet does not prevent the timer from incrementing during the same instruction cycle.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounter32Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
uint32_t timerValue = PLIB_TMR_Counter32BitGet(MY_TMR_INSTANCE);
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5.6.24.5.7.6 PLIB_TMR_Counter32BitSet Function
C
void PLIB_TMR_Counter32BitSet(
TMR_MODULE_ID index,
uint32_t value
);
Description
This function sets the 32-bit timer value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
value 32-bit value to be set
Returns
None.
Remarks
When the timer register is written, the timer increment does not occur for that cycle. Writes to the timer register in the
asynchronous counter mode should be avoided.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounter32Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Counter32BitSet(MY_TMR_INSTANCE, 0x1000000);
5.6.24.5.7.7 PLIB_TMR_Counter8BitClear Function
C
void PLIB_TMR_Counter8BitClear(
TMR_MODULE_ID index
);
Description
This function clears the 8-bit timer value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
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Remarks
When the timer register is written, the timer increment does not occur for that cycle. Writes to the timer register in the
asynchronous counter mode should be avoided.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounter8Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Counter8BitClear(MY_TMR_INSTANCE);
5.6.24.5.7.8 PLIB_TMR_Counter8BitGet Function
C
uint8_t PLIB_TMR_Counter8BitGet(
TMR_MODULE_ID index
);
Description
This function gets the 8-bit timer value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
8-bit timer value.
Remarks
PLIB_TMR_Counter8BitGet does not prevent the timer from incrementing during the same instruction cycle.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounter8Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
uint8_t timerValue = PLIB_TMR_Counter8BitGet(MY_TMR_INSTANCE);
5.6.24.5.7.9 PLIB_TMR_Counter8BitSet Function
C
void PLIB_TMR_Counter8BitSet(
TMR_MODULE_ID index,
uint8_t value
);
Description
This function sets the 8-bit timer value.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
value 8-bit value to be set
Returns
None.
Remarks
When the timer register is written, the timer increment does not occur for that cycle. Writes to the timer register in the
asynchronous counter mode should be avoided.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounter8Bit in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_Counter8BitSet(MY_TMR_INSTANCE, 0x10);
5.6.24.5.7.10 PLIB_TMR_CounterAsyncWriteDisable Function
C
void PLIB_TMR_CounterAsyncWriteDisable(
TMR_MODULE_ID index
);
Description
This function disables the writes to the counter register until the pending write operation completes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounterAsyncWriteControl in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_CounterAsyncWriteDisable(MY_TMR_INSTANCE);
5.6.24.5.7.11 PLIB_TMR_CounterAsyncWriteEnable Function
C
void PLIB_TMR_CounterAsyncWriteEnable(
TMR_MODULE_ID index
);
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Description
This function enables back-to-back writes with legacy asynchronous timer functionality .
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounterAsyncWriteControl in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_CounterAsyncWriteEnable(MY_TMR_INSTANCE);
5.6.24.5.7.12 PLIB_TMR_CounterAsyncWriteInProgress Function
C
bool PLIB_TMR_CounterAsyncWriteInProgress(
TMR_MODULE_ID index
);
Description
This function returns the status of the counter write in Asynchronous mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Write is in progress
• false - Write is complete
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsCounterAsyncWriteInProgress in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
bool inProgress = PLIB_TMR_CounterAsyncWriteInProgress(MY_TMR_INSTANCE);
5.6.24.5.8 Post-processing Functions
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5.6.24.5.8.1 PLIB_TMR_PostscaleDivisorGet Function
C
uint16_t PLIB_TMR_PostscaleDivisorGet(
TMR_MODULE_ID index,
TMR_POSTSCALE postscale
);
Description
This function gets the postscaler divisor information.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
postscale One of the possible values of TMR_POSTSCALE
Returns
Postscaler divisor value.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPostscale in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
uint16_t div = PLIB_TMR_PostscaleDivisorGet (MY_TMR_INSTANCE, TMR_POSTSCALE_1_TO_16);
5.6.24.5.8.2 PLIB_TMR_PostscaleGet Function
C
TMR_POSTSCALE PLIB_TMR_PostscaleGet(
TMR_MODULE_ID index
);
Description
This function gets the postscaler divisor information.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
One of the possible values of TMR_POSTSCALE.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPostscale in your application to determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
TMR_POSTSCALE postscale;
postscale = PLIB_TMR_PostscaleGet (MY_TMR_INSTANCE);
5.6.24.5.8.3 PLIB_TMR_PostscaleSelect Function
C
void PLIB_TMR_PostscaleSelect(
TMR_MODULE_ID index,
TMR_POSTSCALE postscale
);
Description
This function selects the output clock postscaler.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
postscale One of the possible values of TMR_POSTSCALE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsPostscale in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
PLIB_TMR_PostscaleSelect(MY_TMR_INSTANCE, TMR_POSTSCALE_1_TO_1);
5.6.24.5.9 Miscellaneous Functions
5.6.24.5.9.1 PLIB_TMR_IsPeriodMatchBased Function
C
bool PLIB_TMR_IsPeriodMatchBased(
TMR_MODULE_ID index
);
Description
This function gets the operating mode state of the Timer module based on Period Match or Overflow mode.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Operation in Period Match mode
• false - Operation in Overflow mode
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsTimerOperationMode in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
bool status = PLIB_TMR_IsPeriodMatchBased(MY_TMR_INSTANCE);
5.6.24.5.9.2 PLIB_TMR_SystemClockFromTimerIsActive Function
C
bool PLIB_TMR_SystemClockFromTimerIsActive(
TMR_MODULE_ID index
);
Description
This function gets the system clock derivation status. When the function returns true, the system and peripheral clocks are
sourced from the timer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - System/Device Clock is derived from the timer
• false - System/Device Clock is from another source
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_TMR_ExistsSystemClockStatus in your application to determine whether this feature is available.
Example
// Where MY_TMR_INSTANCE, is the timer instance selected for use by the
// application developer.
uint8_t status = PLIB_TMR_SystemClockFromTimerIsActive(MY_TMR_INSTANCE);
5.6.24.5.10 Data Types and Constants
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5.6.24.5.10.1 TMR_ASSIGNMENT Enumeration
C
typedef enum {
TMR_ASSIGNMENT_T1_TO_CCP_ALL,
TMR_ASSIGNMENT_T3_TO_CCP2_T1_TO_CCP1,
TMR_ASSIGNMENT_T3_TO_CCP_ALL
} TMR_ASSIGNMENT;
Description
TMR assignment to modules definition
This data type defines the Timer assignment to modules.
Members
Members Description
TMR_ASSIGNMENT_T1_TO_CCP_ALL Timer1 is the capture/compare clock source for the CCP modules
TMR_ASSIGNMENT_T3_TO_CCP2_T1_TO_CCP1 Timer3 is the capture/compare clock source for CCP2 & Timer1 is the
capture/compare clock source for CCP1
TMR_ASSIGNMENT_T3_TO_CCP_ALL Timer3 is the capture/compare clock source for the CCP modules
Remarks
None.
5.6.24.5.10.2 TMR_CLOCK_SOURCE Enumeration
C
typedef enum {
TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK,
TMR_CLOCK_SOURCE_EXTERNAL_INPUT_PIN
} TMR_CLOCK_SOURCE;
Description
Clock sources selection enumeration
This data type defines the different clock sources.
Members
Members Description
TMR_CLOCK_SOURCE_PERIPHERAL_CLOCK Clock source is the internal clock = FOSC/n (where n, is processor specific)
TMR_CLOCK_SOURCE_EXTERNAL_INPUT_PIN Clock source is the external input pin
Remarks
None.
5.6.24.5.10.3 TMR_CLOCK_SOURCE_EDGE Enumeration
C
typedef enum {
TMR_CLOCK_SOURCE_EDGE_INCREMENT_ON_LOW_TO_HIGH,
TMR_CLOCK_SOURCE_EDGE_INCREMENT_ON_HIGH_TO_LOW
} TMR_CLOCK_SOURCE_EDGE;
Description
Source edge selection enumeration
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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This data type defines the different source edges.
Members
Members Description
TMR_CLOCK_SOURCE_EDGE_INCREMENT_ON_LOW_TO_HIGH Source edge - increment on low to high edge
TMR_CLOCK_SOURCE_EDGE_INCREMENT_ON_HIGH_TO_LOW Source edge - increment on high to low edge
Remarks
None.
5.6.24.5.10.4 TMR_GATE_POLARITY Enumeration
C
typedef enum {
TMR_GATE_POLARITY_ACTIVE_HIGH,
TMR_GATE_POLARITY_ACTIVE_LOW
} TMR_GATE_POLARITY;
Description
Gate polarity selection enumeration
This data type defines the different gate polarities.
Members
Members Description
TMR_GATE_POLARITY_ACTIVE_HIGH Gate Polarity - Active High
TMR_GATE_POLARITY_ACTIVE_LOW Gate Polarity - Active Low
Remarks
None.
5.6.24.5.10.5 TMR_GATE_SOURCE Enumeration
C
typedef enum {
TMR_GATE_SOURCE_T1_GATE,
TMR_GATE_SOURCE_T0_OVERFLOW,
TMR_GATE_SOURCE_CMP1_SYNC_OUTPUT,
TMR_GATE_SOURCE_CMP2_SYNC_OUTPUT
} TMR_GATE_SOURCE;
Description
Gate Source selection enumeration
This data type defines the different gate source selections.
Members
Members Description
TMR_GATE_SOURCE_T1_GATE Timer1 Gate pin
TMR_GATE_SOURCE_T0_OVERFLOW Timer0 overflow output
TMR_GATE_SOURCE_CMP1_SYNC_OUTPUT Comparator 1 optionally synchronized output
TMR_GATE_SOURCE_CMP2_SYNC_OUTPUT Comparator 2 optionally synchronized output
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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Remarks
None.
5.6.24.5.10.6 TMR_MODULE_ID Enumeration
C
typedef enum {
TMR_ID_0,
TMR_ID_1,
TMR_ID_2,
TMR_ID_3,
TMR_ID_4,
TMR_ID_5,
TMR_ID_6,
TMR_ID_7,
TMR_ID_8,
TMR_ID_9,
TMR_NUMBER_OF_MODULES
} TMR_MODULE_ID;
Description
TMR Module ID
This enumeration identifies the available Timer modules.
Members
Members Description
TMR_ID_0 Timer 0
TMR_ID_1 Timer 1
TMR_ID_2 Timer 2
TMR_ID_3 Timer 3
TMR_ID_4 Timer 4
TMR_ID_5 Timer 5
TMR_ID_6 Timer 6
TMR_ID_7 Timer 7
TMR_ID_8 Timer 8
TMR_ID_9 Timer 9
TMR_NUMBER_OF_MODULES Max number of timers
Remarks
The caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to
the next.
Not all modules will be available on all microcontrollers. Refer to the data sheet for the specific controller in use to determine
which modules are supported. The numbers used in the enumeration values will match the numbers given in the data sheet.
5.6.24.5.10.7 TMR_POSTSCALE Enumeration
C
typedef enum {
TMR_POSTSCALE_1_TO_1,
TMR_POSTSCALE_1_TO_2,
TMR_POSTSCALE_1_TO_3,
TMR_POSTSCALE_1_TO_4,
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TMR_POSTSCALE_1_TO_5,
TMR_POSTSCALE_1_TO_6,
TMR_POSTSCALE_1_TO_7,
TMR_POSTSCALE_1_TO_8,
TMR_POSTSCALE_1_TO_9,
TMR_POSTSCALE_1_TO_10,
TMR_POSTSCALE_1_TO_11,
TMR_POSTSCALE_1_TO_12,
TMR_POSTSCALE_1_TO_13,
TMR_POSTSCALE_1_TO_14,
TMR_POSTSCALE_1_TO_15,
TMR_POSTSCALE_1_TO_16
} TMR_POSTSCALE;
Description
Postscaler Values
This macro defines the list of possible postscaler values.
Members
Members Description
TMR_POSTSCALE_1_TO_1 Timer Postscale Value 1:1
TMR_POSTSCALE_1_TO_2 Timer Postscale Value 1:2
TMR_POSTSCALE_1_TO_3 Timer Postscale Value 1:3
TMR_POSTSCALE_1_TO_4 Timer Postscale Value 1:4
TMR_POSTSCALE_1_TO_5 Timer Postscale Value 1:5
TMR_POSTSCALE_1_TO_6 Timer Postscale Value 1:6
TMR_POSTSCALE_1_TO_7 Timer Postscale Value 1:7
TMR_POSTSCALE_1_TO_8 Timer Postscale Value 1:8
TMR_POSTSCALE_1_TO_9 Timer Postscale Value 1:9
TMR_POSTSCALE_1_TO_10 Timer Postscale Value 1:10
TMR_POSTSCALE_1_TO_11 Timer Postscale Value 1:11
TMR_POSTSCALE_1_TO_12 Timer Postscale Value 1:12
TMR_POSTSCALE_1_TO_13 Timer Postscale Value 1:13
TMR_POSTSCALE_1_TO_14 Timer Postscale Value 1:14
TMR_POSTSCALE_1_TO_15 Timer Postscale Value 1:15
TMR_POSTSCALE_1_TO_16 Timer0 Prescaler Value 1:16
5.6.24.5.10.8 TMR_PRESCALE Enumeration
C
typedef enum {
TMR_PRESCALE_1_TO_1,
TMR_PRESCALE_1_TO_8,
TMR_PRESCALE_1_TO_64,
TMR_PRESCALE_1_TO_256,
TMR_PRESCALE_VALUE_1,
TMR_PRESCALE_VALUE_2,
TMR_PRESCALE_VALUE_4,
TMR_PRESCALE_VALUE_8,
TMR_PRESCALE_VALUE_16,
TMR_PRESCALE_VALUE_32,
TMR_PRESCALE_VALUE_64,
TMR_PRESCALE_VALUE_256
} TMR_PRESCALE;
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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Description
Prescaler Values
This macro defines the list of possible prescaler values.
Members
Members Description
TMR_PRESCALE_1_TO_1 Timer Prescaler Value 1:1
TMR_PRESCALE_1_TO_8 Timer Prescaler Value 1:8
TMR_PRESCALE_1_TO_64 Timer Prescaler Value 1:64
TMR_PRESCALE_1_TO_256 Timer Prescaler Value 1:256
TMR_PRESCALE_VALUE_1 Timer Prescaler Value 1:1
TMR_PRESCALE_VALUE_2 Timer Prescaler Value 1:2
TMR_PRESCALE_VALUE_4 Timer Prescaler Value 1:4
TMR_PRESCALE_VALUE_8 Timer Prescaler Value 1:8
TMR_PRESCALE_VALUE_16 Timer Prescaler Value 1:16
TMR_PRESCALE_VALUE_32 Timer Prescaler Value 1:32
TMR_PRESCALE_VALUE_64 Timer Prescaler Value 1:64
TMR_PRESCALE_VALUE_256 Timer Prescaler Value 1:256
5.6.24.5.11 Feature Existence Functions
5.6.24.5.11.1 PLIB_TMR_ExistsClockSource Function
C
bool PLIB_TMR_ExistsClockSource(
TMR_MODULE_ID index
);
Description
This function identifies whether the ClockSource feature is available on the Timer module. When this function returns true, this
function is supported on the device:
• PLIB_TMR_ClockSourceSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ClockSource feature is supported on the device
• false - The ClockSource feature is not supported on the device
Remarks
None.
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5.6.24.5.11.2 PLIB_TMR_ExistsClockSourceEdge Function
C
bool PLIB_TMR_ExistsClockSourceEdge(
TMR_MODULE_ID index
);
Description
This function identifies whether the ClockSourceEdge feature is available on the Timer module. When this function returns true,
these functions are supported on the device:
• PLIB_TMR_ClockSourceEdgeSelect
• PLIB_TMR_ClockSourceEdgeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ClockSourceEdge feature is supported on the device
• false - The ClockSourceEdge feature is not supported on the device
Remarks
None.
5.6.24.5.11.3 PLIB_TMR_ExistsClockSourceSync Function
C
bool PLIB_TMR_ExistsClockSourceSync(
TMR_MODULE_ID index
);
Description
This function identifies whether the ClockSourceSync feature is available on the Timer module. When this function returns true,
these functions are supported on the device:
• PLIB_TMR_ClockSourceExternalSyncEnable
• PLIB_TMR_ClockSourceExternalSyncDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ClockSourceSync feature is supported on the device
• false - The ClockSourceSync feature is not supported on the device
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Remarks
None.
5.6.24.5.11.4 PLIB_TMR_ExistsCounter16Bit Function
C
bool PLIB_TMR_ExistsCounter16Bit(
TMR_MODULE_ID index
);
Description
This function identifies whether the Counter16Bit feature is available on the Timer module. When this function returns true, these
functions are supported on the device:
• PLIB_TMR_Counter16BitSet
• PLIB_TMR_Counter16BitGet
• PLIB_TMR_Counter16BitClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Counter16Bit feature is supported on the device
• false - The Counter16Bit feature is not supported on the device
Remarks
None.
5.6.24.5.11.5 PLIB_TMR_ExistsCounter32Bit Function
C
bool PLIB_TMR_ExistsCounter32Bit(
TMR_MODULE_ID index
);
Description
This function identifies whether the Counter32Bit feature is available on the Timer module. When this function returns true, these
functions are supported on the device:
• PLIB_TMR_Counter32BitSet
• PLIB_TMR_Counter32BitGet
• PLIB_TMR_Counter32BitClear
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Counter32Bit feature is supported on the device
• false - The Counter32Bit feature is not supported on the device
Remarks
None.
5.6.24.5.11.6 PLIB_TMR_ExistsCounter8Bit Function
C
bool PLIB_TMR_ExistsCounter8Bit(
TMR_MODULE_ID index
);
Description
This function identifies whether the Counter8bit feature is available on the Timer module. When this function returns true, these
functions are supported on the device:
• PLIB_TMR_Counter8BitSet
• PLIB_TMR_Counter8BitGet
• PLIB_TMR_Counter8BitClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Counter8bit feature is supported on the device
• false - The Counter8bit feature is not supported on the device
Remarks
None.
5.6.24.5.11.7 PLIB_TMR_ExistsCounterAsyncWriteControl Function
C
bool PLIB_TMR_ExistsCounterAsyncWriteControl(
TMR_MODULE_ID index
);
Description
This function identifies whether the CounterAsyncWriteControl feature is available on the Timer module. When this function
returns true, these functions are supported on the device:
• PLIB_TMR_CounterAsyncWriteEnable
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• PLIB_TMR_CounterAsyncWriteDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CounterAsyncWriteControl feature is supported on the device
• false - The CounterAsyncWriteControl feature is not supported on the device
Remarks
None.
5.6.24.5.11.8 PLIB_TMR_ExistsCounterAsyncWriteInProgress Function
C
bool PLIB_TMR_ExistsCounterAsyncWriteInProgress(
TMR_MODULE_ID index
);
Description
This function identifies whether the CounterAsyncWriteInProgress feature is available on the Timer module. When this function
returns true, this function is supported on the device:
• PLIB_TMR_CounterAsyncWriteInProgress
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CounterAsyncWriteInProgress feature is supported on the device
• false - The CounterAsyncWriteInProgress feature is not supported on the device
Remarks
None.
5.6.24.5.11.9 PLIB_TMR_ExistsCountMode Function
C
bool PLIB_TMR_ExistsCountMode(
TMR_MODULE_ID index
);
Description
This function identifies whether the CountMode feature is available on the Timer module. When this function returns true, these
functions are supported on the device:
• PLIB_TMR_ContinousCountModeEnable
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• PLIB_TMR_SingleShotModeEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The CountMode feature is supported on the device
• false - The CountMode feature is not supported on the device
Remarks
None.
5.6.24.5.11.10 PLIB_TMR_ExistsEnableControl Function
C
bool PLIB_TMR_ExistsEnableControl(
TMR_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the Timer module. When this function returns true,
these functions are supported on the device:
• PLIB_TMR_Start
• PLIB_TMR_Stop
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EnableControl feature is supported on the device
• false - The EnableControl feature is not supported on the device
Remarks
None.
5.6.24.5.11.11 PLIB_TMR_ExistsGateCurrentState Function
C
bool PLIB_TMR_ExistsGateCurrentState(
TMR_MODULE_ID index
);
Description
This function identifies whether the GateCurrentState feature is available on the Timer module. When this function returns true,
this function is supported on the device:
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• PLIB_TMR_GateCurrentStateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The GateCurrentState feature is supported on the device
• false - The GateCurrentState feature is not supported on the device
Remarks
None.
5.6.24.5.11.12 PLIB_TMR_ExistsGatedTimeAccumulation Function
C
bool PLIB_TMR_ExistsGatedTimeAccumulation(
TMR_MODULE_ID index
);
Description
This function identifies whether the GatedTimeAccumulation feature is available on the Timer module. When this function returns
true, these functions are supported on the device:
• PLIB_TMR_GateEnable
• PLIB_TMR_GateDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The GatedTimeAccumulation feature is supported on the device
• false - The GatedTimeAccumulation feature is not supported on the device
Remarks
None.
5.6.24.5.11.13 PLIB_TMR_ExistsGatePolarity Function
C
bool PLIB_TMR_ExistsGatePolarity(
TMR_MODULE_ID index
);
Description
This function identifies whether the GatePolarity feature is available on the Timer module. When this function returns true, this
function is supported on the device:
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• PLIB_TMR_GatePolaritySelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The GatePolarity feature is supported on the device
• false - The GatePolarity feature is not supported on the device
Remarks
None.
5.6.24.5.11.14 PLIB_TMR_ExistsGateSinglePulseAcqusition Function
C
bool PLIB_TMR_ExistsGateSinglePulseAcqusition(
TMR_MODULE_ID index
);
Description
This function identifies whether the GateSinglePulseAcquisition feature is available on the Timer module. When this function
returns true, these functions are supported on the device:
• PLIB_TMR_GateSinglePulseAcquisitionStart
• PLIB_TMR_GateSinglePulseAcquisitionHasCompleted
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The GateSinglePulseAcquisition feature is supported on the device
• false - The GateSinglePulseAcquisition feature is not supported on the device
Remarks
None.
5.6.24.5.11.15 PLIB_TMR_ExistsGateSinglePulseMode Function
C
bool PLIB_TMR_ExistsGateSinglePulseMode(
TMR_MODULE_ID index
);
Description
This function identifies whether the GateSinglePulseMode feature is available on the Timer module. When this function returns
true, these functions are supported on the device:
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• PLIB_TMR_GateSinglePulseModeEnable
• PLIB_TMR_GateSinglePulseModeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The GateSinglePulseMode feature is supported on the device
• false - The GateSinglePulseMode feature is not supported on the device
Remarks
None.
5.6.24.5.11.16 PLIB_TMR_ExistsGateSource Function
C
bool PLIB_TMR_ExistsGateSource(
TMR_MODULE_ID index
);
Description
This function identifies whether the GateSource feature is available on the Timer module. When this function returns true, this
function is supported on the device:
• PLIB_TMR_GateSourceSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The GateSource feature is supported on the device
• false - The GateSource feature is not supported on the device
Remarks
None.
5.6.24.5.11.17 PLIB_TMR_ExistsGateToggleMode Function
C
bool PLIB_TMR_ExistsGateToggleMode(
TMR_MODULE_ID index
);
Description
This function identifies whether the GateToggleMode feature is available on the Timer module. When this function returns true,
these functions are supported on the device:
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• PLIB_TMR_GateToggleModeEnable
• PLIB_TMR_GateToggleModeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The GateToggleMode feature is supported on the device
• false - The GateToggleMode feature is not supported on the device
Remarks
None.
5.6.24.5.11.18 PLIB_TMR_ExistsMode16Bit Function
C
bool PLIB_TMR_ExistsMode16Bit(
TMR_MODULE_ID index
);
Description
This function identifies whether the Mode16Bit feature is available on the Timer module. When this function returns true, this
function is supported on the device:
• PLIB_TMR_Mode16BitEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Mode16Bit feature is supported on the device
• false - The Mode16Bit feature is not supported on the device
Remarks
None.
5.6.24.5.11.19 PLIB_TMR_ExistsMode32Bit Function
C
bool PLIB_TMR_ExistsMode32Bit(
TMR_MODULE_ID index
);
Description
This function identifies whether the Mode32Bit feature is available on the Timer module. When this function returns true, this
function is supported on the device:
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• PLIB_TMR_Mode32BitEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Mode32Bit feature is supported on the device
• false - The Mode32Bit feature is not supported on the device
Remarks
None.
5.6.24.5.11.20 PLIB_TMR_ExistsMode8Bit Function
C
bool PLIB_TMR_ExistsMode8Bit(
TMR_MODULE_ID index
);
Description
This function identifies whether the Mode8Bit feature is available on the Timer module. When this function returns true, this
function is supported on the device:
• PLIB_TMR_Mode8BitEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Mode8Bit feature is supported on the device
• false - The Mode8Bit feature is not supported on the device
Remarks
None.
5.6.24.5.11.21 PLIB_TMR_ExistsOperationInSleep Function
C
bool PLIB_TMR_ExistsOperationInSleep(
TMR_MODULE_ID index
);
Description
This function identifies whether the OperationInSleep feature is available on the Timer module. When this function returns true,
these functions are supported on the device:
• PLIB_TMR_OperateInSleepEnable
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• PLIB_TMR_OperateInSleepDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OperationInSleep feature is supported on the device
• false - The OperationInSleep feature is not supported on the device
Remarks
None.
5.6.24.5.11.22 PLIB_TMR_ExistsPeriod16Bit Function
C
bool PLIB_TMR_ExistsPeriod16Bit(
TMR_MODULE_ID index
);
Description
This function identifies whether the Period16Bit feature is available on the Timer module. When this function returns true, these
functions are supported on the device:
• PLIB_TMR_Period16BitSet
• PLIB_TMR_Period16BitGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Period16Bit feature is supported on the device
• false - The Period16Bit feature is not supported on the device
Remarks
None.
5.6.24.5.11.23 PLIB_TMR_ExistsPeriod32Bit Function
C
bool PLIB_TMR_ExistsPeriod32Bit(
TMR_MODULE_ID index
);
Description
This function identifies whether the Period32Bit feature is available on the Timer module. When this function returns true, these
functions are supported on the device:
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• PLIB_TMR_Period32BitSet
• PLIB_TMR_Period32BitGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Period32Bit feature is supported on the device
• false - The Period32Bit feature is not supported on the device
Remarks
None.
5.6.24.5.11.24 PLIB_TMR_ExistsPeriod8Bit Function
C
bool PLIB_TMR_ExistsPeriod8Bit(
TMR_MODULE_ID index
);
Description
This function identifies whether the Period8Bit feature is available on the Timer module. When this function returns true, these
functions are supported on the device:
• PLIB_TMR_Period8BitSet
• PLIB_TMR_Period8BitGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Period8Bit feature is supported on the device
• false - The Period8Bit feature is not supported on the device
Remarks
None.
5.6.24.5.11.25 PLIB_TMR_ExistsPostscale Function
C
bool PLIB_TMR_ExistsPostscale(
TMR_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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Description
This function identifies whether the Postscale feature is available on the Timer module. When this function returns true, these
functions are supported on the device:
• PLIB_TMR_PostscaleSelect
• PLIB_TMR_PostscaleGet
• PLIB_TMR_PostscaleDivisorGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Postscale feature is supported on the device
• false - The Postscale feature is not supported on the device
Remarks
None.
5.6.24.5.11.26 PLIB_TMR_ExistsPrescale Function
C
bool PLIB_TMR_ExistsPrescale(
TMR_MODULE_ID index
);
Description
This function identifies whether the Prescale feature is available on the Timer module. When this function returns true, these
functions are supported on the device:
• PLIB_TMR_PrescaleSelect
• PLIB_TMR_PrescaleGet
• PLIB_TMR_PrescaleDivisorGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Prescale feature is supported on the device
• false - The Prescale feature is not supported on the device
Remarks
None.
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5.6.24.5.11.27 PLIB_TMR_ExistsPrescalerAssignment Function
C
bool PLIB_TMR_ExistsPrescalerAssignment(
TMR_MODULE_ID index
);
Description
This function identifies whether the PrescalerControl feature is available on the Timer module. When this function returns true,
these functions are supported on the device:
• PLIB_TMR_PrescalerEnable
• PLIB_TMR_PrescalerDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PrescalerControl feature is supported on the device
• false - The PrescalerControl feature is not supported on the device
Remarks
None.
5.6.24.5.11.28 PLIB_TMR_ExistsStopInIdleControl Function
C
bool PLIB_TMR_ExistsStopInIdleControl(
TMR_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the Timer module. When this function returns true, these
functions are supported on the device:
• PLIB_TMR_StopInIdleEnable
• PLIB_TMR_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StopInIdle feature is supported on the device
• false - The StopInIdle feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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Remarks
None.
5.6.24.5.11.29 PLIB_TMR_ExistsSystemClockStatus Function
C
bool PLIB_TMR_ExistsSystemClockStatus(
TMR_MODULE_ID index
);
Description
This function identifies whether the SystemClockStatus feature is available on the Timer module. When this function returns true,
this function is supported on the device:
• PLIB_TMR_SystemClockFromTimerIsActive
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SystemClockStatus feature is supported on the device
• false - The SystemClockStatus feature is not supported on the device
Remarks
None.
5.6.24.5.11.30 PLIB_TMR_ExistsTimerAssignment Function
C
bool PLIB_TMR_ExistsTimerAssignment(
TMR_MODULE_ID index
);
Description
This function identifies whether the TimerAssignment feature is available on the Timer module. When this function returns true,
this function is supported on the device:
• PLIB_TMR_AssignmentSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TimerAssignment feature is supported on the device
• false - The TimerAssignment feature is not supported on the device
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Remarks
None.
5.6.24.5.11.31 PLIB_TMR_ExistsTimerOperationMode Function
C
bool PLIB_TMR_ExistsTimerOperationMode(
TMR_MODULE_ID index
);
Description
This function identifies whether the TimerOperationMode feature is available on the Timer module. When this function returns
true, this function is supported on the device:
• PLIB_TMR_IsPeriodMatchBased
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TimerOperationMode feature is supported on the device
• false - The TimerOperationMode feature is not supported on the device
Remarks
None.
5.6.24.5.11.32 PLIB_TMR_ExistsTimerOscillator Function
C
bool PLIB_TMR_ExistsTimerOscillator(
TMR_MODULE_ID index
);
Description
This function identifies whether the TimerOscillator feature is available on the Timer module. When this function returns true,
these functions are supported on the device:
• PLIB_TMR_TimerOscillatorEnable
• PLIB_TMR_TimerOscillatorDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TimerOscillator feature is supported on the device
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• false - The TimerOscillator feature is not supported on the device
Remarks
None.
5.6.24.5.11.33 PLIB_TMR_ExistsTriggerEventReset Function
C
bool PLIB_TMR_ExistsTriggerEventReset(
TMR_MODULE_ID index
);
Description
This function identifies whether the TriggerEventReset feature is available on the Timer module. When this function returns true,
these functions are supported on the device:
• PLIB_TMR_TriggerEventResetEnable
• PLIB_TMR_TriggerEventResetDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TriggerEventReset feature is supported on the device
• false - The TriggerEventReset feature is not supported on the device
Remarks
None.
5.6.24.6 Files
Files
Name Description
plib_tmr.h Timer Peripheral Library interface header.
Description
5.6.24.6.1 plib_tmr.h
Timer Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Timer Peripheral Library.
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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Functions
Name Description
PLIB_TMR_AssignmentSelect Assigns the specified Timer(s) to the selected modules.
PLIB_TMR_ClockSourceEdgeGet Gets the source edge information.
PLIB_TMR_ClockSourceEdgeSelect Selects the input clock source edge.
PLIB_TMR_ClockSourceExternalSyncDisable Disables the clock synchronization of the external input.
PLIB_TMR_ClockSourceExternalSyncEnable Enables the clock synchronization of the external input.
PLIB_TMR_ClockSourceSelect Selects the clock source.
PLIB_TMR_ContinousCountModeEnable Enables Continous Count mode
PLIB_TMR_Counter16BitClear Clears the 16-bit timer value.
PLIB_TMR_Counter16BitGet Gets the 16-bit timer value.
PLIB_TMR_Counter16BitSet Sets the 16-bit timer value.
PLIB_TMR_Counter32BitClear Clears the 32-bit timer value.
PLIB_TMR_Counter32BitGet Gets the 32-bit timer value.
PLIB_TMR_Counter32BitSet Sets the 32-bit timer value.
PLIB_TMR_Counter8BitClear Clears the 8-bit timer value.
PLIB_TMR_Counter8BitGet Gets the 8-bit timer value.
PLIB_TMR_Counter8BitSet Sets the 8-bit timer value.
PLIB_TMR_CounterAsyncWriteDisable Disables the writes to the counter register until the pending
write operation completes.
PLIB_TMR_CounterAsyncWriteEnable Enables back-to-back writes with legacy asynchronous
timer functionality.
PLIB_TMR_CounterAsyncWriteInProgress Returns the status of the counter write in Asynchronous
mode.
PLIB_TMR_ExistsClockSource Identifies whether the ClockSource feature exists on the
Timer module.
PLIB_TMR_ExistsClockSourceEdge Identifies whether the ClockSourceEdge feature exists on
the Timer module.
PLIB_TMR_ExistsClockSourceSync Identifies whether the ClockSourceSync feature exists on
the Timer module.
PLIB_TMR_ExistsCounter16Bit Identifies whether the Counter16Bit feature exists on the
Timer module.
PLIB_TMR_ExistsCounter32Bit Identifies whether the Counter32Bit feature exists on the
Timer module.
PLIB_TMR_ExistsCounter8Bit Identifies whether the Counter8bit feature exists on the
Timer module.
PLIB_TMR_ExistsCounterAsyncWriteControl Identifies whether the CounterAsyncWriteControl feature
exists on the Timer module.
PLIB_TMR_ExistsCounterAsyncWriteInProgress Identifies whether the CounterAsyncWriteInProgress
feature exists on the Timer module.
PLIB_TMR_ExistsCountMode Identifies whether the CountMode feature exists on the
Timer module.
PLIB_TMR_ExistsEnableControl Identifies whether the EnableControl feature exists on the
Timer module.
PLIB_TMR_ExistsGateCurrentState Identifies whether the GateCurrentState feature exists on
the Timer module.
PLIB_TMR_ExistsGatedTimeAccumulation Identifies whether the GatedTimeAccumulation feature
exists on the Timer module.
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PLIB_TMR_ExistsGatePolarity Identifies whether the GatePolarity feature exists on the
Timer module.
PLIB_TMR_ExistsGateSinglePulseAcqusition Identifies whether the GateSinglePulseAcquisition feature
exists on the Timer module.
PLIB_TMR_ExistsGateSinglePulseMode Identifies whether the GateSinglePulseMode feature exists
on the Timer module.
PLIB_TMR_ExistsGateSource Identifies whether the GateSource feature exists on the
Timer module.
PLIB_TMR_ExistsGateToggleMode Identifies whether the GateToggleMode feature exists on
the Timer module.
PLIB_TMR_ExistsMode16Bit Identifies whether the Mode16Bit feature exists on the
Timer module.
PLIB_TMR_ExistsMode32Bit Identifies whether the Mode32Bit feature exists on the
Timer module.
PLIB_TMR_ExistsMode8Bit Identifies whether the Mode8Bit feature exists on the
Timer module.
PLIB_TMR_ExistsOperationInSleep Identifies whether the OperationInSleep feature exists on
the Timer module.
PLIB_TMR_ExistsPeriod16Bit Identifies whether the Period16Bit feature exists on the
Timer module.
PLIB_TMR_ExistsPeriod32Bit Identifies whether the Period32Bit feature exists on the
Timer module.
PLIB_TMR_ExistsPeriod8Bit Identifies whether the Period8Bit feature exists on the
Timer module.
PLIB_TMR_ExistsPostscale Identifies whether the Postscale feature exists on the
Timer module.
PLIB_TMR_ExistsPrescale Identifies whether the Prescale feature exists on the Timer
module.
PLIB_TMR_ExistsPrescalerAssignment Identifies whether the PrescalerControl feature exists on
the Timer module.
PLIB_TMR_ExistsStopInIdleControl Identifies whether the StopInIdle feature exists on the
Timer module.
PLIB_TMR_ExistsSystemClockStatus Identifies whether the SystemClockStatus feature exists on
the Timer module.
PLIB_TMR_ExistsTimerAssignment Identifies whether the TimerAssignment feature exists on
the Timer module.
PLIB_TMR_ExistsTimerOperationMode Identifies whether the TimerOperationMode feature exists
on the Timer module.
PLIB_TMR_ExistsTimerOscillator Identifies whether the TimerOscillator feature exists on the
Timer module.
PLIB_TMR_ExistsTriggerEventReset Identifies whether the TriggerEventReset feature exists on
the Timer module.
PLIB_TMR_GateCurrentStateGet Returns the current level of the timer gate.
PLIB_TMR_GateDisable Enables counting regardless of the corresponding timer
gate function.
PLIB_TMR_GateEnable Enables counting controlled by the corresponding gate
function.
PLIB_TMR_GatePolaritySelect Selects the timer gate polarity.
PLIB_TMR_GateSinglePulseAcquisitionHasCompleted Returns the gate single pulse acquisition status.
PLIB_TMR_GateSinglePulseAcquisitionStart Starts the gate single pulse acquisition.
PLIB_TMR_GateSinglePulseModeDisable Disables Single Pulse mode.
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PLIB_TMR_GateSinglePulseModeEnable Enables Single pulse mode and the controlling
corresponding timer gate.
PLIB_TMR_GateSourceSelect Selects the timer gate source.
PLIB_TMR_GateToggleModeDisable Disables the Gate Toggle mode.
PLIB_TMR_GateToggleModeEnable Enables the Gate Toggle mode.
PLIB_TMR_IsPeriodMatchBased Gets the operating mode state of the Timer module based
on Period Match or Overflow mode.
PLIB_TMR_Mode16BitEnable Enables the Timer module for 16-bit operation and
disables all other modes.
PLIB_TMR_Mode32BitEnable Enables 32-bit operation on the Timer module combination.
PLIB_TMR_Mode8BitEnable Enables the Timer module in 8-bit operation mode and
disables 16-bit mode.
PLIB_TMR_OperateInSleepDisable Disables Timer module operation when the device is in
Sleep mode.
PLIB_TMR_OperateInSleepEnable Enables Timer module operation when the device is in
Sleep mode.
PLIB_TMR_Period16BitGet Gets the 16-bit period value.
PLIB_TMR_Period16BitSet Sets the 16-bit period value.
PLIB_TMR_Period32BitGet Gets the 32-bit period value.
PLIB_TMR_Period32BitSet Sets the 32-bit period value.
PLIB_TMR_Period8BitGet Gets the 8-bit period value.
PLIB_TMR_Period8BitSet Sets the 8-bit period value.
PLIB_TMR_PostscaleDivisorGet Gets the postscaler divisor information.
PLIB_TMR_PostscaleGet Gets the postscaler divisor information.
PLIB_TMR_PostscaleSelect Selects the output clock postscaler.
PLIB_TMR_PrescaleDivisorGet Gets the prescaler divisor information.
PLIB_TMR_PrescaleGet Gets the prescaler information.
PLIB_TMR_PrescalerDisable Disables the prescaler assignment to the indexed Timer
module.
PLIB_TMR_PrescalerEnable Enables the prescaler assignment to the indexed Timer
module.
PLIB_TMR_PrescaleSelect Selects the clock prescaler.
PLIB_TMR_SingleShotModeEnable Enables Single-shot mode.
PLIB_TMR_Start Starts/enables the indexed timer.
PLIB_TMR_Stop Stops/disables the indexed timer.
PLIB_TMR_StopInIdleDisable Continue module operation when the device enters Idle
mode.
PLIB_TMR_StopInIdleEnable Discontinues module operation when the device enters
Idle mode.
PLIB_TMR_SystemClockFromTimerIsActive Gets the system clock status.
PLIB_TMR_TimerOscillatorDisable Disables the oscillator associated with the Timer module.
PLIB_TMR_TimerOscillatorEnable Enables the oscillator associated with the Timer module.
PLIB_TMR_TriggerEventResetDisable Disables the special event trigger reset.
PLIB_TMR_TriggerEventResetEnable Enables the special event trigger reset.
File Name
plib_tmr.h
5.6 Peripheral Library Help MPLAB Harmony Help Timer Peripheral Library
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Company
Microchip Technology Inc.
5.6.25 USART Peripheral Library
5.6.25.1 Introduction
USART Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the USART Peripheral Library on the Microchip family of microcontrollers with a
convenient C language interface. It can be used to simplify low-level access to the module without the necessity of interacting
directly with the module's registers, thus hiding differences from one microcontroller variant to another.
Description
Overview
The Universal Synchronous/Asynchronous Receiver/Transmitter (USART) module is the key component of the serial
communications sub-system of a computer. The USART takes the data and transmits the individual bits in a sequential fashion.
While receiving, the USART reassembles the bits into complete bytes. The data can be 8-bit or 9-bit.
There are two primary forms of serial transmission: Asynchronous and Synchronous.
Asynchronous
Asynchronous transmission allows data to be transmitted without the sender having to send a clock signal to the receiver.
Instead, the sender and receiver must agree on timing parameters (i.e., baud rate) in advance and special bits are added to each
word, which are used to synchronize the sending and receiving units.
When a word is given to the USART for asynchronous transmissions, a bit called the "Start" bit is added to the beginning of each
word that is to be transmitted. The Start bit is used to alert the receiver that a word of data is about to be sent. After the Start bit,
the individual bits of the word of data are sent, with the Least Significant bit (LSb) being sent first. When the entire data word has
been sent, the transmitter may add a Parity bit that the transmitter generates. The Parity bit may be used by the receiver to
perform simple error checking. Then, at least one Stop bit is sent by the transmitter.
The Start bit is always a space and the Stop bits are always marks. Each transmitted bit persists for a period of 1/(Baud Rate).
An on-chip dedicated Baud Rate Generator (BRG) is used to derive standard baud rate frequencies.
When the receiver has received all of the bits in the data word, it may check for the Parity bits (both sender and receiver must
agree on whether a Parity bit is to be used), and then the receiver looks for a Stop bit. If the Stop bit does not appear when it is
supposed to, the USART module considers the entire word to be unintelligible and will report a framing error to the host
processor when the data word is read.
Note: Please refer to the the specific device data sheet or the related family reference manual section for details.
Synchronous
Synchronous serial transmission requires that the sender and receiver share a clock with one another, or that the sender provide
a strobe or other timing signal so that the receiver knows when to “read” the next bit of the data. This mode is not available on all
microcontrollers.
5.6 Peripheral Library Help MPLAB Harmony Help USART Peripheral Library
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It is typically used in systems with a single master and one or more slaves. The master device contains the necessary circuitry
for baud rate generation and supplies the clock for all devices in the system.
There are two signal lines a bidirectional data line and a clock line. Since the data line is bidirectional, synchronous operation is
only half-duplex.
Start and Stop bits are not used in synchronous transmissions.
5.6.25.2 Release Notes
MPLAB Harmony Version: v0.70b USART Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.25.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.6.25.4 Using the Library
This topic describes the basic architecture of the USART Peripheral Library and provides information and examples on how to
use it.
Interface Header File: peripheral.h
The interface to the USART Peripheral library is defined in the "plib_usart.h" header file. Any C language source (.c) file that
uses the USART Peripheral library should include "peripheral.h".
Library File:
The USART Peripheral library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the library interacts with the framework.
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5.6.25.4.1 Hardware Abstraction Model
This section describes the hardware abstraction model.
Description
Hardware Abstraction Model
Hardware Abstraction Model
The USART Peripheral Library provides interface routines to interact with the blocks shown in the diagram.
The Baud Rate Controller controls the timing in Asynchronous mode, the desired baud rate can be programmed in the baud
rate controller or, the baud rate controller can be configured to determine the baud rate of the transmitting device automatically.
The Transmitter and Receiver are capable of handling 8-bit or 9-bit data, which can be programmed in the control logic. The
9th bit is used to transfer the address or the parity. Enable 9-bit mode if the hardware is to be used for address or parity
detection.
The Status and Control logic, provide the ability to control different ways the transmitter, receiver, and the baud rate controller
can function. It also can provides status about the transmitter, receiver, or the baud rate controller.
The Hardware Flow Control uses CTS and the RTS lines to perform handshaking. Flow control is the ability to stop, and then
restart the flow without any loss of bytes. Flow control is needed for modems and other hardware to allow a jump in
instantaneous flow rates.
Note: This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
The USART module provides two types of infrared USART support: one is the IrDA clock output to support the external IrDA
encoder and decoder, and the other is the full implementation of the IrDA encoder and decoder.
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Note: This feature is not available on all devices. Please refer to the specific device data sheet to determine availability.
5.6.25.4.2 Library Usage Model
This section describes the library usage model.
Description
Usage Model
Each of the blocks in the diagram correspond to the library interface section.
Library Interface Section Description
5.6.25.4.3 How the Library Works
This section provides information on using the peripheral library with the USART module. The usage model for different
scenarios is also described.
5.6.25.4.3.1 State Machine
This section describes the transmission and reception state machine.
Description
The following state machine is for the transmission and reception during normal operation. This state machine provides a
general idea of the usage model of the USART Peripheral Library. Refer to the usage model for more detailed steps for the
scenario that is being used.
Transmit and Receive State machine
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Notes:
1. The wait states shown in red in the diagram can either be achieved using polled functions or using interrupts.
2. Refer to the specific USART mode in use for the setup and initialization steps.
3. Refer to the following table for the functions that can be used at each state.
State Associated Function
Setup and
initialization
Refer to the specific USART mode for detailed setup instructions.
Wait for
data to
send
Once the USART module has been appropriately set up and initialized, the state machine waits for the application
to issue one of the send data functions.
Wait for
data to be
received
When the application is using Polled mode, the application can use the function
PLIB_USART_ReceiverDataIsAvailable. When the application is using Interrupt mode, the application should wait
for a receive interrupt.
Enable
transmitter
Use the function PLIB_USART_TransmitterEnable to enable the transmitter
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Wait for
transmitter
to have
empty
space
When the application is using polled mode, the application can use the function
PLIB_USART_TransmitterBufferIsFull. When the application is using Interrupt mode, the application should wait
for a transmit interrupt.
Send data Use the function PLIB_USART_TransmitterByteSend to send data. If an address needs to be transmitted or if a
byte needs to be transmitted with a Parity bit use the function PLIB_USART_Transmitter9BitsSend.
Disable
transmitter
Use the function PLIB_USART_TransmitterDisable to disable the transmitter.
Get status To get the status of the hardware module, use the set of functions,
PLIB_USART_ReceiverFramingErrorHasOccurred, PLIB_USART_ReceiverParityErrorHasOccurred, and
PLIB_USART_ReceiverOverrunHasOccurred.
Read data Use the function PLIB_USART_ReceiverByteReceive to read data.
Clear
overrun
error
Clear the overrun error using the function PLIB_USART_ReceiverOverrunErrorClear.
5.6.25.4.3.2 Asynchronous USART Mode
This section provides processes for setting up asynchronous transmission and reception.
Description
Asynchronous Transmission
Setup
1. Set the desired baud rate using either PLIB_USART_BaudRateHighSet or PLIB_USART_BaudRateSet.
2. Set the appropriate I/O direction and corresponding RX and TX I/O pins.
3. If available on the device, enable the asynchronous serial port using PLIB_USART_SyncModeSelect.
4. Set the number of data bits (8 or 9) and other line control modes using PLIB_USART_LineControlModeSelect.
5. Optional (if available on the device): If desired, enable the transmit interrupt.
• Ensure that the interrupts are enabled for the system and the peripherals
• Select the interrupt priority
• Set up the transmit FIFO interrupt mode using PLIB_USART_TransmitterInterruptModeSelect. Refer to
USART_TRANSMIT_INTR_MODE for a list of possible values.
6. Enable the USART module using the function PLIB_USART_Enable
Example: Asynchronous Transmission Setup
// Set the desired baud rate
uint32_t baudRate = 9600;
// where, MY_USART_INSTANCE - is a specific instance of the hardware peripheral.
// where, MY_CLOCK_FREQUENCY - is hardware clock frequency which is currently
//being used by the system.
PLIB_USART_BaudRateSet(MY_USART_INSTANCE, baudRate, MY_CLOCK_FREQUENCY);
// Enable the asynchronous serial port.
// enable asynchronous mode if the part supports it
PLIB_USART_SyncModeSelect(MY_USART_INSTANCE, USART_ASYNC_MODE);
/* Select 8 data bits, No parity and one stop bit */
PLIB_USART_LineControlModeSelect(MY_USART_INSTANCE, USART_8N1);
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// enable USART
PLIB_USART_Enable(MY_USART_INSTANCE);
// Set the appropriate IO direction for USART pins
// TODO - Call the appropriate function.
Enable Transmission
1. Enable the transmission using PLIB_USART_TransmitterEnable.
2. Ensure that the transmit buffer is not full, before attempting to write into the transmit buffer. Either poll using
PLIB_USART_TransmitterBufferIsFull or wait for the transmit interrupt.
3. Start the transmission using PLIB_USART_TransmitterByteSend (if transmitting 8-bit data) or
PLIB_USART_Transmitter9BitsSend (if transmitting an address or if transmitting a byte with parity).
4. After the transmission is complete, disable the transmitter.
Example: Asynchronous Transmission
// Enable the transmission
PLIB_USART_TransmitterEnable(MY_USART_INSTANCE);
// TODO - Either wait for Transmit buffer to be not full or wait for
//an transmit interrupt.
// Transmit the byte when Transmit buffer is empty.
// where, my_byte is the 8 bit data to be transmitted
PLIB_USART_TransmitterByteSend(MY_USART_INSTANCE, my_byte);
Asynchronous Transmission of Break Characters
A break characters consists of a Start Bit followed by twelve bits of "0" and a Stop Bit.
Setup and Transmission
1. Configure the desired mode, using the previous steps described.
2. Enable the transmitter using PLIB_USART_TransmitterEnable.
3. Transmit the break character using PLIB_USART_TransmitterBreakSend function.
4. Check if the break transmission is complete using PLIB_USART_TransmitterBreakSendIsComplete.
5. Transmission of the next bytes can start.
Example: USART Break and Sync Transmission
// Set the desired baud rate
uint32_t baudRate = 9600;
// where, MY_USART_INSTANCE - is a specific instance of the hardware peripheral
// where, MY_CLOCK_FREQUENCY - is hardware clock frequency which is currently
//being used by the system.
PLIB_USART_BaudRateSet(MY_USART_INSTANCE, baudRate, MY_CLOCK_FREQUENCY);
// Enable the asynchronous serial port.
// enable asynchronous mode if the part supports it
PLIB_USART_SyncModeSelect(MY_USART_INSTANCE, USART_ASYNC_MODE);
/* Select 8 data bits, No parity and one stop bit */
PLIB_USART_LineControlModeSelect(MY_USART_INSTANCE, USART_8N1);
// enable USART
PLIB_USART_Enable(MY_USART_INSTANCE);
// Set the appropriate IO direction for USART pins
// TODO - Call the appropriate function.
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// Enable the transmission
PLIB_USART_TransmitterEnable(MY_USART_INSTANCE);
// Start the transmission
// Transmit the break character
PLIB_USART_TransmitterBreakSend(MY_USART_INSTANCE);
// Transmit the byte
while(PLIB_USART_TransmitterBreakSendIsComplete(MY_USART_INSTANCE));
PLIB_USART_TransmitterByteSend(MY_USART_INSTANCE, 0x55);
Refer to the following steps for setting up asynchronous receptions and how to receive data.
Asynchronous Reception
Setup
1. Set the desired baud rate using PLIB_USART_BaudRateHighSet or PLIB_USART_BaudRateSet.
2. Set the appropriate I/O direction and corresponding RX and TX I/O pins.
3. If available on the device, enable the asynchronous serial port using PLIB_USART_SyncModeSelect.
4. Set the number of data bits (8 or 9) and other line control modes using PLIB_USART_LineControlModeSelect.
5. Optional (if available on the device): If desired, enable the receive interrupt.
• Ensure that the interrupts are enabled for the system and the peripherals
• Select the interrupt priority
• Set up the receive FIFO interrupt mode using PLIB_USART_ReceiverInterruptModeSelect. Refer to
USART_RECEIVE_INTR_MODE for a list of possible values.
6. Optional: If inverted receive polarity is desired, use PLIB_USART_ReceiverIdleStateLowEnable.
7. If available on the device, enable the reception using PLIB_USART_ReceiverEnable.
8. Enable the USART module using PLIB_USART_Enable.
Example: Asynchronous Reception Setup
// Set the desired baud rate
uint32_t baudRate = 9600;
// where, MY_USART_INSTANCE - is a specific instance of the hardware peripheral.
// where, MY_CLOCK_FREQUENCY - is hardware clock frequency which is currently being
// used by the system.
PLIB_USART_BaudRateHighSet(MY_USART_INSTANCE, baudRate, MY_CLOCK_FREQUENCY);
// Enable the synchronous slave serial port.
// enable asynchronous mode if the part supports it
PLIB_USART_SyncModeSelect(MY_USART_INSTANCE, USART_ASYNC_MODE);
// enable USART
PLIB_USART_Enable(MY_USART_INSTANCE);
// Set the appropriate IO direction for USART pins
// TODO - Call the appropriate function.
// Start the reception
// Enable the continuous reception
PLIB_USART_ReceiverEnable(MY_USART_INSTANCE);
Reception
1. Either wait for an interrupt, which will be generated when the reception is completed, or poll using
PLIB_USART_ReceiverDataIsAvailable.
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2. Read the status of the device using PLIB_USART_ReceiverOverrunHasOccurred,
PLIB_USART_ReceiverParityErrorHasOccurred, and PLIB_USART_ReceiverFramingErrorOccurred.
3. Read the data using PLIB_USART_ReceiverByteReceive.
4. If an overrun error occurred, clear the error using PLIB_USART_ReceiverOverrunErrorClear.
Example: Asynchronous Reception
// TODO - Either wait for Receive buffer to have data or wait for
// a receive interrupt.
// read the data
my_byte = PLIB_USART_ReceiverByteReceive(MY_USART_INSTANCE);
// where, my_byte is the 8 bit data received
// If overrun error clear the error.
if(PLIB_USART_ReceiverOverrunHasOccurred(MY_USART_INSTANCE))
{
PLIB_USART_ReceiverOverrunErrorClear(MY_USART_INSTANCE);
}
Asynchronous Reception with Address Detection Mode
A typical multi-processor communication protocol will differentiate between data bytes and address/control bytes. A common
method is to use a 9th data bit to identify whether a data byte is address or data information. If the 9th bit is set, the data is
processed as address or control information. If the 9th bit is cleared, the received data word is processed as data associated
with the previous address/control byte.
The protocol operates as follows:
• The master device transmits a data word with 9th bit set. The data word contains the address of a slave device.
• All slave devices in the communication chain receive the address word and check the slave address.
• The slave device that was addressed will receive and process subsequent data bytes sent by the master device. All other
slave devices will discard subsequent data bytes until a new address word(9th bit set) is received.
This mode will typically be used in RS-485 systems.
Setup
1. Set the desired baud rate using PLIB_USART_BaudRateHighSet or PLIB_USART_BaudRateSet.
2. Set the appropriate I/O direction and corresponding RX and TX I/O pins.
3. If available on the device, enable the asynchronous serial port using PLIB_USART_SyncModeSelect.
4. Set the number of data bits (8 or 9) and other line control modes using PLIB_USART_LineControlModeSelect.
5. Optional (if available on the device): If desired, enable the receive interrupt.
• Ensure that the interrupts are enabled for the system and the peripherals. Also select the interrupt priority.
• Set up the receive FIFO interrupt mode by using the function PLIB_USART_ReceiverInterruptModeSelect. Refer to
USART_RECEIVE_INTR_MODE for a list of possible values.
• For Address Detect mode, configure PLIB_USART_ReceiverInterruptModeSelect with the receive FIFO interrupt mode as
USART_RECEIVE_FIFO_ONE_CHAR.
6. Optional: If inverted receive polarity is desired, use PLIB_USART_ReceiverIdleStateLowEnable.
7. If available on the device, enable the reception using PLIB_USART_ReceiverEnable.
8. Enable address detection using PLIB_USART_ReceiverAddressDetectEnable.
9. Enable the USART module using PLIB_USART_Enable.
Note: This feature is not available on all devices. On devices where automatic address detection is available, configure
automatic address detection using PLIB_USART_AutomaticAddressDetectModeSetup. Skip steps 2-6 in the following Reception
section during the reception phase.
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Example: Asynchronous Reception Setup ( with address detect enable)
// Set the desired baud rate
uint32_t baudRate = 9600;
// where, MY_USART_INSTANCE - is a specific instance of the hardware peripheral.
// where, MY_CLOCK_FREQUENCY - is hardware clock frequency which is currently
// being used by the system.
PLIB_USART_BaudRateHighSet(MY_USART_INSTANCE, baudRate, MY_CLOCK_FREQUENCY);
// Enable the synchronous slave serial port.
// enable sync mode
PLIB_USART_SyncModeSelect(MY_USART_INSTANCE, USART_ASYNC_MODE);
// enable USART
PLIB_USART_Enable(MY_USART_INSTANCE);
// Set the appropriate IO direction for USART pins
// TODO - Call the appropriate function.
// Set the reception to 9 bits to enable address byte.
PLIB_USART_LineControlModeSelect(MY_USART_INSTANCE, USART_9N1);
// Enable address detection.
PLIB_USART_ReceiverAddressDetectEnable(MY_USART_INSTANCE);
// Start the reception
// Enable the continuous reception
PLIB_USART_ReceiverEnable(MY_USART_INSTANCE);
Reception
1. Either wait for an interrupt, which will be generated when the reception is completed or poll using
PLIB_USART_ReceiverDataIsAvailable.
2. Read the address using PLIB_USART_ReceiverByteReceive.
3. The application determines if this is the device address. If the device is addressed, disable address detect using
PLIB_USART_ReceiverAddressDetectDisable to allow subsequent data bytes to be received; otherwise, discard the received
word.
4. Read the status of the device using PLIB_USART_ReceiverOverrunHasOccurred,
PLIB_USART_ReceiverParityErrorHasOccurred, and PLIB_USART_ReceiverFramingErrorHasOccurred.
5. If an overrun error occurred, clear the error using PLIB_USART_ReceiverOverrunErrorClear.
6. If the device has been addressed, disable the address detection using PLIB_USART_ReceiverAddressDetectDisable, which
will allow all received data into the receive buffer and generate interrupts if desired.
7. Optional (if available on the device): If a long packet is expected, the receive interrupt mode could be changed to buffer more
than one data word between interrupts. Use PLIB_USART_ReceiverInterruptModeSelect with
USART_RECEIVE_FIFO_HALF_FULL or USART_RECEIVE_FIFO_3B4FULL.
8. When the last data byte has been received, enable the address detect using PLIB_USART_ReceiverAddressDetectEnable,
so that only address bytes will be received.
9. Optional (if available on the device): Ensure that the receive interrupt is configured to be triggered after each received word
using PLIB_USART_ReceiverInterruptModeSelect with USART_RECEIVE_FIFO_ONE_CHAR.
Example: Asynchronous Reception (with Address Detect)
// Either wait for Receive buffer to have data or wait for a receive interrupt.
int8_t my_address;
// Receive the address
if(PLIB_USART_ReceiverDataIsAvailable(MY_USART_INSTANCE))
{
my_address = PLIB_USART_ReceiverByteReceive(MY_USART_INSTANCE);
// where, my_address is the address received
}
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// If overrun error clear the error.
if(PLIB_USART_ReceiverOverrunHasOccurred(MY_USART_INSTANCE))
{
PLIB_USART_ReceiverOverrunErrorClear(MY_USART_INSTANCE);
}
if(my_address == MY_DEVICE_ADDRESS)
{
// The device has been addressed.
PLIB_USART_ReceiverAddressDetectDisable(MY_USART_INSTANCE);
}
// TODO - Receive the data bytes for the packet. Either wait for RX buffer
//to have data or wait for a receive interrupt.
// When all the bytes for the packet are received.
// Enable address detection mode
PLIB_USART_ReceiverAddressDetectEnable(MY_USART_INSTANCE);
5.6.25.4.3.3 Synchronous Master Mode
This section provides processes for setting up synchronous master transmission and reception.
Note: This feature is not available on all devices. Please refer to the specific device data sheet or related family reference
manual to determine which features are supported for your device.
Description
Synchronous Master Transmission
Setup
1. Set the desired baud rate using PLIB_USART_BaudRateSet or PLIB_USART_BaudRateHighSet.
2. Enable the synchronous master serial port using PLIB_USART_SyncModeSelect, PLIB_USART_SyncClockSourceSelect,
and PLIB_USART_Enable.
3. Set the appropriate I/O direction and corresponding RX and TX I/O pins.
4. Disable receive using PLIB_USART_ReceiverDisable.
5. Optional: If desired set the number of data bits to 9 (to send address byte or to enable parity check) using
PLIB_USART_Transmitter9BitModeEnable.
6. Optional: If desired, enable the transmit interrupt, ensuring that the interrupts are enabled for the system and the peripherals.
Example: Synchronous Master Transmission Setup
// Set the desired baud rate
uint32_t baudRate = 9600;
// where, MY_USART_INSTANCE - is a specific instance of the hardware peripheral.
// where, MY_CLOCK_FREQUENCY - is hardware clock frequency which is currently being used by
the system.
PLIB_USART_BaudRateHighSet(MY_USART_INSTANCE, baudRate, MY_CLOCK_FREQUENCY);
// Enable the synchronous master serial port.
// enable sync mode
PLIB_USART_SyncModeSelect(MY_USART_INSTANCE, USART_ASYNC_MODE);
// enable master clock
PLIB_USART_SyncClockSourceSelect(MY_USART_INSTANCE, USART_SYNC_CLOCK_SOURCE_MASTER);
// enable USART
PLIB_USART_Enable(MY_USART_INSTANCE);
// Set the appropriate IO direction for USART pins
// TODO Call the appropriate function.
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Transmission
1. Enable transmission using PLIB_USART_TransmitterEnable.
2. Ensure that the transmit buffer is not full before attempting to write onto the transmit buffer. Either poll using
PLIB_USART_TransmitterBufferIsFull or wait for the transmit interrupt.
Note: If using interrupts, make sure that interrupts are also enabled for the system and the peripherals.
3. Start the transmission using PLIB_USART_TransmitterByteSend (if transmitting 8 - bit data) or
PLIB_USART_Transmitter9BitsSend (if transmitting address or if transmitting a byte with parity).
4. After the transmission is complete, disable the transmitter.
Example: Synchronous Master Transmission
// Enable the transmission
PLIB_USART_TransmitterEnable(MY_USART_INSTANCE);
// TODO Either wait for Transmit buffer to be not full or wait for an transmit interrupt.
// Transmit the byte when Transmit buffer is empty.
// where, my_byte is the 8 bit data to be transmitted
PLIB_USART_TransmitterByteSend(MY_USART_INSTANCE, my_byte);
Synchronous Master Reception
Setup
1. Set the desired baud rate using PLIB_USART_BaudRateSet or PLIB_USART_BaudRateHighSet.
2. Enable the synchronous master serial port using PLIB_USART_SyncModeSelect, PLIB_USART_SyncClockSourceSelect,
and PLIB_USART_Enable.
3. Set the appropriate IO direction and corresponding to RX and TX I/O pins.
4. Optional: If desired, enable the receive interrupt, ensuring that the interrupts are enabled for the system and the peripherals.
5. Start the reception using PLIB_USART_ReceiverDisable.
Example: Synchronous Master Reception Setup
uint32_t baudRate = 9600;
// where, MY_USART_INSTANCE - is a specific instance of the hardware peripheral.
// where, MY_CLOCK_FREQUENCY - is hardware clock frequency which is currently being used by
the system.
PLIB_USART_BaudRateHighSet(MY_USART_INSTANCE, baudRate, MY_CLOCK_FREQUENCY);
PLIB_USART_HandshakeModeSelect(MY_USART_INSTANCE,
USART_HANDSHAKE_MODE_SIMPLEX);
// Enable the synchronous master serial port.
// enable sync mode
PLIB_USART_SyncModeSelect(MY_USART_INSTANCE, USART_SYNC_MODE);
// enable master clock
PLIB_USART_SyncClockSourceSelect(MY_USART_INSTANCE, USART_SYNC_CLOCK_SOURCE_MASTER);
// enable USART
PLIB_USART_Enable(MY_USART_INSTANCE);
// Set the appropriate IO direction for USART pins
// TODO - Call the appropriate function.
// Enable receive mode
PLIB_USART_ReceiverEnable(MY_USART_INSTANCE);
Reception
1. Either wait for an interrupt, which will be generated when the reception is completed, or poll using
PLIB_USART_ReceiverDataIsAvailable.
Note: If using interrupts, ensure that interrupts are also enabled for the system and the peripherals.
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2. Read the status of the device using PLIB_USART_ReceiverOverrunHasOccurred,
PLIB_USART_ReceiverParityErrorHasOccurred and PLIB_USART_ReceiverFramingErrorHasOccurred.
3. Read the data using PLIB_USART_ReceiverByteReceive.
4. If an overrun error occurred, clear the error using the function PLIB_USART_ReceiverOverrunErrorClear.
Example: Synchronous Master Reception
// Read the byte
// where, my_byte is the 8 bit data to be transmitted
my_byte = PLIB_USART_ReceiverByteReceive(MY_USART_INSTANCE);
if(PLIB_USART_ReceiverOverrunHasOccurred(MY_USART_INSTANCE))
{
PLIB_USART_ReceiverOverrunErrorClear(MY_USART_INSTANCE);
}
5.6.25.4.3.4 Synchronous Slave Mode
This section provides processes for setting up synchronous slave transmission and reception.
Note: This feature is not available on all devices. Please refer to the specific device data sheet or related family reference
manual to determine which features are supported for your device.
Description
Synchronous Slave Transmission
Setup
1. Set the desired baud rate using either PLIB_USART_BaudRateHighSet or PLIB_USART_BaudRateSet.
2. Enable the synchronous slave serial port using PLIB_USART_SyncModeSelect, PLIB_USART_ClockSourceSlaveSelect, and
PLIB_USART_Enable.
3. Set the appropriate I/O direction and corresponding RX and TX I/O pins.
4. Disable receive mode using PLIB_USART_ReceiverDisable.
5. Optional: If desired, enable the transmit interrupt,ensuring that the interrupts are enabled for the system and the peripherals.
Example: Synchronous Slave Transmission Setup
// Set the desired baud rate
uint32_t baudRate = 9600;
// where, MY_USART_INSTANCE - is a specific instance of the hardware
//peripheral MY_CLOCK_FREQUENCY - is hardware clock frequency which is
//currently being used by the system.
PLIB_USART_BaudRateHighSet(MY_USART_INSTANCE, baudRate, MY_CLOCK_FREQUENCY);
// Enable the synchronous slave serial port.
// enable sync mode
PLIB_USART_SyncModeSelect(MY_USART_INSTANCE, USART_SYNC_MODE);
// enable slave clock
PLIB_USART_SyncClockSourceSelect(MY_USART_INSTANCE, USART_SYNC_CLOCK_SOURCE_SLAVE);
// enable USART
PLIB_USART_Enable(MY_USART_INSTANCE);
// Set the appropriate IO direction for USART pins
// TODO - Call the appropriate function.
// Disable receive mode
PLIB_USART_ReceiverDisable(MY_USART_INSTANCE);
// TODO - If using interrupts Enable the transmit interrupt
// TODO - Call the appropriate function for the transmit enable interrupt,
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// TODO - Also, make sure that the interrupts are enabled for system and the peripherals.
Transmission
1. Enable transmission using PLIB_USART_TransmitterEnable.
2. Ensure that the transmit buffer is not full before attempting to write into the transmit buffer. Either poll using
PLIB_USART_TransmitterBufferIsFull or wait for the transmit interrupt.
Note: If using interrupts, ensure that interrupts are also enabled for the system and the peripherals.
3. Start the transmission using PLIB_USART_TransmitterByteSend (if transmitting 8-bit data) or
PLIB_USART_Transmitter9BitsSend (if transmitting address if transmitting a byte with parity)
4. After the transmission is complete, disable the transmitter.
Example: Synchronous Slave Transmission
// Enable the transmission
PLIB_USART_TransmitterEnable(MY_USART_INSTANCE);
// TODO - Either wait for Transmit buffer to be not full or wait
//for an transmit interrupt.
// Transmit the byte when Transmit buffer is empty.
PLIB_USART_TransmitterByteSend(MY_USART_INSTANCE, my_word);
// where, my_word is the 9 bit data to be transmitted
Synchronous Slave Reception
Setup
1. Set the desired baud rate using PLIB_USART_BaudRateHighSet or PLIB_USART_BaudRateSet.
2. Enable the synchronous master serial port using PLIB_USART_SyncModeSelect, PLIB_USART_SyncClockSourceSelect,
and PLIB_USART_Enable.
3. Set the appropriate I/O direction and corresponding RX and TX I/O pins.
4. Optional: If desired, enable the receive interrupt, ensuring that the interrupts are enabled for the system and the peripherals.
5. Start the reception using PLIB_USART_ReceiverEnable.
Example: Synchronous Slave Reception Setup
// Set the desired baud rate
uint32_t baudRate = 9600;
// where, MY_USART_INSTANCE - is a specific instance of the hardware peripheral.
// where, MY_CLOCK_FREQUENCY - is hardware clock frequency which is currently
//being used by the system.
PLIB_USART_BaudRateHighSet(MY_USART_INSTANCE, baudRate, MY_CLOCK_FREQUENCY);
// Enable the synchronous slave serial port.
// enable sync mode
PLIB_USART_SyncModeSelect(MY_USART_INSTANCE, USART_SYNC_MODE);
// enable master clock
PLIB_USART_SyncClockSourceSelect(MY_USART_INSTANCE, USART_SYNC_CLOCK_SOURCE_SLAVE);
// enable USART
PLIB_USART_Enable(MY_USART_INSTANCE);
// Set the appropriate IO direction for USART pins
// TODO - Call the appropriate function.
// Start the reception
// Enable the continuous reception
PLIB_USART_ReceiverDisable(MY_USART_INSTANCE);
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Reception
1. Either wait for an interrupt, which will be generated when the reception is completed, or poll using
PLIB_USART_ReceiverDataIsAvailable.
Note: If using interrupts make sure that interrupts are also enabled for the system and the peripherals.
2. Read the status of the device using PLIB_USART_ReceiverOverrunHasOccurred,
PLIB_USART_ReceiverParityErrorHasOccurred, and PLIB_USART_ReceiverFramingErrorHasOccurred.
3. Read the data using PLIB_USART_ReceiverByteReceive.
4. If an overrun error occurred, clear the error using PLIB_USART_ReceiverOverrunErrorClear.
Example: Synchronous Slave Reception
// Transmit the data
my_byte = PLIB_USART_ReceiverByteReceive(MY_USART_INSTANCE);
// where, my_byte is the 8 bit data received
// If overrun error clear the error.
if(PLIB_USART_ReceiverOverrunHasOccurred(MY_USART_INSTANCE))
{
PLIB_USART_ReceiverOverrunErrorClear(MY_USART_INSTANCE);
}
5.6.25.4.3.5 Other Features
This section describes additional features of the USART Peripheral Library.
Note: The features described in this section are not available on all devices. Please refer to the specific device data sheet or the
related family reference manual to determine which features are supported by your device.
Description
IrDA Support
Support for IrDA is available in some microcontrollers.
1. Enable IrDA support using PLIB_USART_IrDAEnable. IrDA support can be disabled using PLIB_USART_IrDADisable.
2. Optional: If using the external IrDA encoder and decoder, use the function PLIB_USART_OperationModeSelect with
USART_ENABLE_TX_RX_BCLK_USED to output the 16x baud clock.
3. Optional: IrDA Transmit Polarity can be inverted using PLIB_USART_TransmitterIdleIsLowEnable.
4. Optional: IrDA Receive Polarity can be inverted using PLIB_USART_ReceiverIdleStateLowEnable.
5. Enable the USART using PLIB_USART_Enable.
Loopback Support
This is the mode in which the transmission is internally connected to reception.
1. Set the desired baud rate using PLIB_USART_BaudRateSet or PLIB_USART_BaudRateHighSet.
2. Set up the line control parameters (data bits, stop bits, parity, flow control) using PLIB_USART_LineControlModeSelect. Refer
to USART_LINECONTROL_MODE for a list of possible values.
3. Set the appropriate I/O direction and corresponding RX and TX I/O pins.
4. Optional: If desired, enable the transmit interrupt, also make sure that the interrupts are enabled for the system and the
peripherals.
5. Optional: Also select the interrupt priority.
6. Optional: Also, set up the transmit FIFO interrupt mode using PLIB_USART_TransmitterInterruptModeSelect. Refer to
USART_TRANSMIT_INTR_MODE for a list of possible values.
7. Enable the USART module using PLIB_USART_Enable and enable the transmission using PLIB_USART_TransmitterEnable.
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8. Enable loopback using PLIB_USART_LoopbackEnable. Loopback can be disabled at any time using
PLIB_USART_LoopbackDisable
9. Continue with transmission and/or reception using the same steps as for asynchronous transmission/reception.
Auto Baud Support
1. Enable the auto baud detection using the function PLIB_USART_BaudRateAutoDetectEnable, which requires a reception of
the Sync character (0x55).
2. Optional: Poll PLIB_USART_BaudRateAutoDetectIsComplete to check if the baud rate is detected.
3. Optional: Call PLIB_USART_BaudRateGet to get the baud rate that was detected.
4. Clear the receive interrupt.
5. On some microcontrollers, reading the data using PLIB_USART_ReceiverByteReceive may be required.
Flow Control Support
The USART can use Simplex or Flow Control modes:
• Use PLIB_USART_HandshakeModeSelect to enable flow control (USART_HANDSHAKE_MODE_FLOW_CONTROL) or use
simplex mode (USART_HANDSHAKE_MODE_SIMPLEX) selected from USART_HANDSHAKE_MODE.
• To configure the USART line control features, use PLIB_USART_LineControlModeSelect selected from
USART_LINECONTROL_MODE.
• Additionally, the USART pins may need to be configured using PLIB_USART_OperationModeSelect and the appropriate
values from USART_OPERATION_MODE.
Operation During Sleep Mode
When the device enters Sleep mode, all clock sources supplied to the USART modules are shut down. If the device enters Sleep
mode in the middle of a USART transmission or reception operation, the operation is aborted and the USART pins are driven to
default state.
A Start bit, when detected, can wake up the device.
• The application needs to enable the wake-up on start bit using PLIB_USART_WakeOnStartEnable just before entering Sleep
mode, to wake-up the device
• For the device to wake-up from sleep, reception of the Sync character or Wake-up Signal character is required
• Optional: If using interrupts, a receive interrupt is generated
Operation During Idle Mode
When the device enters Idle mode, the system clock sources remain functional and the CPU stops code execution.
• USART operation during Idle mode can be stopped using PLIB_USART_StopInIdleEnable. When the device enters Idle
mode, the USART module operation is similar to that as in Sleep mode(Refer to Operation in Sleep Mode).
• By default, the USART module continues to operate in Idle mode and provide full functionality
USART Operation With DMA
The DMA module can be used to transfer data between the USART and the CPU, without CPU assistance.
1. Set the desired baud rate using the function PLIB_USART_BaudRateSet or PLIB_USART_BaudRateHighSet.
2. Set up the line control parameters (data bits, stop bits, parity, flow control) using the function
PLIB_USART_LineControlModeSelect. Refer to USART_LINECONTROL_MODE for a list of possible values.
3. Set the appropriate I/O direction and corresponding RX and TX I/O pins.
4. Enable the USART module using PLIB_USART_Enable and enable the transmission using PLIB_USART_TransmitterEnable.
5. Enable the Transmit, Receive, and Error interrupts, ensuring that the interrupts are enabled for the system and the peripherals.
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6. Select the interrupt priority.
7. Set up the Transmit FIFO Interrupt mode and Receive FIFO Interrupt mode using the
PLIB_USART_TransmitterFIFOLevelSelect and PLIB_USART_ReceiverFIFOLevelSelect functions. To generate interrupts for
every character received, use USART_RECEIVE_FIFO_ONE_CHAR from USART_RECEIVE_INTR_MODE.
8. Configure the DMA to be used with the USART receiver and transmitter.
5.6.25.4.4 Configuring the Library
The library is configured for the supported USART modules when the processor is chosen in the MPLAB IDE.
5.6.25.5 Library Interface
Data Types and Constants
Name Description
USART_BAUD_RATE_MODE Lists the USART baud rate modes.
USART_HANDSHAKE_MODE Lists the USART handshake modes.
USART_LINECONTROL_MODE Data type defining the different configurations by which the USART data flow
can be configured.
USART_MODULE_ID Enumeration: USART_MODULE_ID
This enumeration defines the number of modules that are available on the
microcontroller. This is the superset of all of the possible instances that might
be available on Microchip microcontrollers.
Refer to the data sheet to get the correct number of modules defined for
desired microcontroller.
USART_OPERATION_MODE Data type defining the different configurations by which the USART can be
enabled.
USART_RECEIVE_INTR_MODE Data type defining the different Receive FIFO levels by which the USART
receive interrupt modes can be configured.
USART_RECEIVE_MODES Lists the USART receive modes.
USART_SYNC_CLOCK_SOURCE Lists the USART clock sources.
USART_SYNC_MODES Selection between asynchronous communication and synchronous
communication.
USART_TRANSMIT_INTR_MODE Data type defining the different transmit FIFO levels by which the USART
transmit interrupt modes can be configured.
Baud Rate Generator Functions
Name Description
PLIB_USART_BaudRateAutoDetectEnable Enables baud rate measurement on the next character,
which requires reception of the Sync character.
PLIB_USART_BaudRateAutoDetectIsComplete Gets the state of the automatic baud detection.
PLIB_USART_BaudRateAutoDetectOverflowHasOccurred Identifies if the automatic baud timer has overflowed.
PLIB_USART_BaudRateGet Gets the baud rate current in use.
PLIB_USART_BaudRateHighDisable Disables the high baud rate selection.
PLIB_USART_BaudRateHighEnable Enables high baud rate selection.
PLIB_USART_BaudRateHighSet Sets the baud rate to the desired value.
PLIB_USART_BaudRateModeSelect Enables the 16-bit Baud Rate Generator (BRG).
PLIB_USART_BaudRateSet Sets the baud rate to the desired value.
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Feature Existence Functions
Name Description
PLIB_USART_ExistsAlternateIO Identifies whether the AlternateIOEnableControl feature exists
on the USART module.
PLIB_USART_ExistsBaudRate Identifies whether the BaudRate feature exists on the USART
module.
PLIB_USART_ExistsBaudRateAutoDetect Identifies whether the BaudRateAutoDetect feature exists on
the USART module.
PLIB_USART_ExistsBaudRateAutoDetectOverflow Identifies whether the BaudRateAutoDetectOverflow feature
exists on the USART module.
PLIB_USART_ExistsBaudRateBitMode Identifies whether the BaudRateMode feature exists on the
USART module.
PLIB_USART_ExistsBaudRateHigh Identifies whether the BaudRateHigh feature exists on the
USART module.
PLIB_USART_ExistsEnable Identifies whether the EnableControl feature exists on the
USART module.
PLIB_USART_ExistsHandshakeMode Identifies whether the HandShakeMode feature exists on the
USART module.
PLIB_USART_ExistsIrDA Identifies whether the IrDAControl feature exists on the
USART module.
PLIB_USART_ExistsLineControlMode Identifies whether the LineControlMode feature exists on the
USART module.
PLIB_USART_ExistsLoopback Identifies whether the Loopback feature exists on the USART
module.
PLIB_USART_ExistsOperationMode Identifies whether the OperationMode feature exists on the
USART module.
PLIB_USART_ExistsReceiver Identifies whether the Receiver feature exists on the USART
module.
PLIB_USART_ExistsReceiverAddressAutoDetect Identifies whether the ReceiverAddressAutoDetect feature
exists on the USART module.
PLIB_USART_ExistsReceiverAddressDetect Identifies whether the ReceiverAddressDetect feature exists
on the USART module.
PLIB_USART_ExistsReceiverDataAvailableStatus Identifies whether the ReceiverDataAvailable feature exists on
the USART module
PLIB_USART_ExistsReceiverEnable Identifies whether the ReceiverEnableControl feature exists on
the USART module.
PLIB_USART_ExistsReceiverFramingErrorStatus Identifies whether the ReceiverFramingError feature exists on
the USART module.
PLIB_USART_ExistsReceiverIdleStateLowEnable Identifies whether the ReceiverPolarityInvert feature exists on
the USART module.
PLIB_USART_ExistsReceiverIdleStatus Identifies whether the ReceiverIdle feature exists on the
USART module.
PLIB_USART_ExistsReceiverInterruptMode Identifies whether the ReceiverInterruptMode feature exists on
the USART module.
PLIB_USART_ExistsReceiverMode Identifies whether the ReceiverMode feature exists on the
USART module.
PLIB_USART_ExistsReceiverOverrunStatus Identifies whether the ReceiverOverrunError feature exists on
the USART module.
PLIB_USART_ExistsReceiverParityErrorStatus Identifies whether the ReceiverParityError feature exists on
the USART module.
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PLIB_USART_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the USART
module.
PLIB_USART_ExistsSyncClockPolarity Identifies whether the SyncClockPolarity feature exists on the
USART module.
PLIB_USART_ExistsSyncClockSource Identifies whether the SyncClockSource feature exists on the
USART module.
PLIB_USART_ExistsSyncMode Identifies whether the SyncMode feature exists on the USART
module.
PLIB_USART_ExistsTransmitter Identifies whether the Transmitter feature exists on the
USART module.
PLIB_USART_ExistsTransmitter9BitsSend Identifies whether the Transmitter9Bits feature exists on the
USART module.
PLIB_USART_ExistsTransmitterBreak Identifies whether the TransmitterBreak feature exists on the
USART module.
PLIB_USART_ExistsTransmitterBufferFullStatus Identifies whether the TransmitterBufferFull feature exists on
the USART module.
PLIB_USART_ExistsTransmitterEmptyStatus Identifies whether the TransmitterEmpty feature exists on the
USART module.
PLIB_USART_ExistsTransmitterEnable Identifies whether the TransmitterEnableControl feature exists
on the USART module
PLIB_USART_ExistsTransmitterIdleIsLow Identifies whether the TransmitterIdleIsLow feature exists on
the USART module.
PLIB_USART_ExistsTransmitterIdleStatus Identifies whether the TransmitterIdle feature exists on the
USART module.
PLIB_USART_ExistsTransmitterInterruptMode Identifies whether the TransmitterInterruptMode feature exists
on the USART module.
PLIB_USART_ExistsWakeOnStart Identifies whether the WakeOnStart feature exists on the
USART module.
General Functions
Name Description
PLIB_USART_AlternateIODisable Disables the use of alternate I/O pins for the receiver and
transmitter.
PLIB_USART_AlternateIOEnable Enables the use of alternate I/O pins for the receiver and
transmitter.
PLIB_USART_Disable Disables the specific USART module
PLIB_USART_Enable Enables the specific USART module.
PLIB_USART_HandshakeModeSelect Sets the data flow configuration.
PLIB_USART_IrDADisable Disables the IrDA encoder and decoder.
PLIB_USART_IrDAEnable Enables the IrDA encoder and decoder.
PLIB_USART_LineControlModeSelect Sets the data flow configuration.
PLIB_USART_LoopbackDisable Disables Loopback mode.
PLIB_USART_LoopbackEnable Enables Loopback mode.
PLIB_USART_OperationModeSelect Configures the operation mode of the USART module.
PLIB_USART_StopInIdleDisable Disables the Stop in Idle mode (the USART module continues
operation when the device is in Idle mode).
PLIB_USART_StopInIdleEnable Discontinues operation when the device enters Idle mode.
PLIB_USART_SyncClockPolarityIdleHighDisable Sets the idle state of the clock to low.
PLIB_USART_SyncClockPolarityIdleHighEnable Sets the idle state of the clock to high.
PLIB_USART_SyncClockSourceSelect Sets the clock source.
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PLIB_USART_SyncModeSelect Selects the USART mode to be asynchronous.
PLIB_USART_WakeOnStartDisable Disables the wake-up on start bit detection feature during Sleep
mode.
PLIB_USART_WakeOnStartEnable Enables the wake-up on start bit detection feature during Sleep
mode.
PLIB_USART_WakeOnStartIsEnabled Gets the state of the sync break event completion.
Receiver Functions
Name Description
PLIB_USART_ReceiverAddressAutoDetectDisable Disables the automatic Address Detect mode.
PLIB_USART_ReceiverAddressAutoDetectEnable Setup the automatic Address Detect mode.
PLIB_USART_ReceiverAddressDetectDisable Enables the Address Detect mode.
PLIB_USART_ReceiverAddressDetectEnable Enables the Address Detect mode.
PLIB_USART_ReceiverAddressIsReceived Checks and return if the data received is an address.
PLIB_USART_ReceiverByteReceive Data to be received in the Byte mode.
PLIB_USART_ReceiverDataIsAvailable Identifies if the receive data is available for the specified
USART module.
PLIB_USART_ReceiverDisable Disables the USART receiver.
PLIB_USART_ReceiverEnable Enables the USART receiver.
PLIB_USART_ReceiverFramingErrorHasOccurred Gets the framing error status.
PLIB_USART_ReceiverIdleStateLowDisable Disables receive polarity inversion.
PLIB_USART_ReceiverIdleStateLowEnable Enables receive polarity inversion.
PLIB_USART_ReceiverInterruptModeSelect Sets the USART receiver FIFO level.
PLIB_USART_ReceiverIsIdle Identifies if the receiver is idle.
PLIB_USART_ReceiverModeSelect Disables Single Receive mode.
PLIB_USART_ReceiverOverrunErrorClear Clears a USART Overrun error.
PLIB_USART_ReceiverOverrunHasOccurred Identifies if there was a receiver overrun error.
PLIB_USART_ReceiverParityErrorHasOccurred Gets the parity error status.
Transmitter Functions
Name Description
PLIB_USART_Transmitter9BitsSend Data to be transmitted in the byte mode with the 9th bit.
PLIB_USART_TransmitterBreakSend Transmits the break character.
PLIB_USART_TransmitterBreakSendIsComplete Returns the status of the break transmission
PLIB_USART_TransmitterBufferIsFull Gets the transmit buffer full status.
PLIB_USART_TransmitterByteSend Data to be transmitted in the Byte mode.
PLIB_USART_TransmitterDisable Disables the specific USART module transmitter.
PLIB_USART_TransmitterEnable Enables the specific USART module transmitter.
PLIB_USART_TransmitterIdleIsLowDisable Disables the Transmit Idle Low state.
PLIB_USART_TransmitterIdleIsLowEnable Enables the Transmit Idle Low state.
PLIB_USART_TransmitterInterruptModeSelect Set the USART transmitter interrupt mode.
PLIB_USART_TransmitterIsEmpty Gets the transmit shift register empty status.
PLIB_USART_TransmitterIsIdle Gets the transmit buffer full status.
Description
This section describes the functions, data types, and constants available in the USART Peripheral Library.
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5.6.25.5.1 General Functions
5.6.25.5.1.1 PLIB_USART_AlternateIODisable Function
C
void PLIB_USART_AlternateIODisable(
USART_MODULE_ID index
);
Description
This function disables the USART module to use the alternate I/O pins for the receiver and transmitter.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsAlternateIO in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_AlternateIODisable(MY_USART_INSTANCE);
5.6.25.5.1.2 PLIB_USART_AlternateIOEnable Function
C
void PLIB_USART_AlternateIOEnable(
USART_MODULE_ID index
);
Description
This function enables the USART module to use the alternate I/O pins for the receiver and transmitter.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_USART_ExistsAlternateIO in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_AlternateIOEnable(MY_USART_INSTANCE);
5.6.25.5.1.3 PLIB_USART_Disable Function
C
void PLIB_USART_Disable(
USART_MODULE_ID index
);
Description
This function disables the specific USART module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
The default state after any reset for a USART module is the disable state. If the USART is disabled, all of the related pins are in
control of the general purpose I/O logic.
Disabling the USART module resets the buffers to empty states. Any data characters in the buffers are lost and the baud rate is
reset. All error and status bits are also reset.
Disabling the USART while the USART is active, will abort all pending transmissions and receptions. Re-enabling the USART
will restart the module in the same configuration.
When disabled, the USART power consumption is minimal.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsEnable in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_Disable(MY_USART_INSTANCE);
5.6.25.5.1.4 PLIB_USART_Enable Function
C
void PLIB_USART_Enable(
USART_MODULE_ID index
);
Description
This function enables the specific USART module.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
By calling this function, the USART pins are controlled by the USART module.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsEnable in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_Enable(MY_USART_INSTANCE);
5.6.25.5.1.5 PLIB_USART_HandshakeModeSelect Function
C
void PLIB_USART_HandshakeModeSelect(
USART_MODULE_ID index,
USART_HANDSHAKE_MODE handshakeConfig
);
Description
This function sets the USART data flow configuration based on the mask provided and the specified baud rate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode For possible data flow configurations, refer to USART_HANDSHAKE_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsHandshakeMode in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_HandshakeModeSelect(MY_USART_INSTANCE,
USART_HANDSHAKE_MODE_SIMPLEX);
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5.6.25.5.1.6 PLIB_USART_IrDADisable Function
C
void PLIB_USART_IrDADisable(
USART_MODULE_ID index
);
Description
This function disables the IrDA encoder and decoder.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
By default, the IrDA Encoder and Decoder are disabled.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsIrDA in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_IrDADisable(MY_USART_INSTANCE);
5.6.25.5.1.7 PLIB_USART_IrDAEnable Function
C
void PLIB_USART_IrDAEnable(
USART_MODULE_ID index
);
Description
This function enables the IrDA encoder and decoder.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsIrDA in your application to determine whether this feature is available.
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Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_IrDAEnable(MY_USART_INSTANCE);
5.6.25.5.1.8 PLIB_USART_LineControlModeSelect Function
C
void PLIB_USART_LineControlModeSelect(
USART_MODULE_ID index,
USART_LINECONTROL_MODE dataFlowConfig
);
Description
This function sets the USART data flow configuration based on the mask provided and the specified baud rate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode For possible data flow configurations, refer to USART_LINECONTROL_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsLineControlMode in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_LineControlModeSelect(MY_USART_INSTANCE,
USART_8N1);
5.6.25.5.1.9 PLIB_USART_LoopbackDisable Function
C
void PLIB_USART_LoopbackDisable(
USART_MODULE_ID index
);
Description
This function disables Loopback mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
None.
Remarks
By default, Loopback mode is disabled.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsLoopback in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_LoopbackDisable(MY_USART_INSTANCE);
5.6.25.5.1.10 PLIB_USART_LoopbackEnable Function
C
void PLIB_USART_LoopbackEnable(
USART_MODULE_ID index
);
Description
This function enables Loopback mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
By default, Loopback mode is disabled.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsLoopback in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_LoopbackEnable(MY_USART_INSTANCE);
5.6.25.5.1.11 PLIB_USART_OperationModeSelect Function
C
void PLIB_USART_OperationModeSelect(
USART_MODULE_ID index,
USART_OPERATION_MODE operationmode
);
Description
This function configures the operation mode of the USART (i.e., controls the pins used by the USART module). Refer to
USART_OPERATION_MODE for the possible settings.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
operationmode One of the possible values from USART_OPERATION_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsOperationMode in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_OperationModeSelect(MY_USART_INSTANCE, USART_ENABLE_TX_RX_BCLK_USED);
5.6.25.5.1.12 PLIB_USART_StopInIdleDisable Function
C
void PLIB_USART_StopInIdleDisable(
USART_MODULE_ID index
);
Description
This function disables the Stop in Idle mode. The USART module continues operation when the device is in Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
By default, the USART module will continue operation in idle mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsStopInIdle in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_StopInIdleDisable(MY_USART_INSTANCE);
5.6.25.5.1.13 PLIB_USART_StopInIdleEnable Function
C
void PLIB_USART_StopInIdleEnable(
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USART_MODULE_ID index
);
Description
This function enables the USART module to discontinue operation when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsStopInIdle in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_StopInIdleEnable(MY_USART_INSTANCE);
5.6.25.5.1.14 PLIB_USART_SyncClockPolarityIdleHighDisable Function
C
void PLIB_USART_SyncClockPolarityIdleHighDisable(
USART_MODULE_ID index
);
Description
This function sets the clock idle in the synchronous mode to low.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Calling this function disables the clock polarity idle as high.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsSyncClockPolarity in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_SyncClockPolarityIdleHighDisable(MY_USART_INSTANCE);
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5.6.25.5.1.15 PLIB_USART_SyncClockPolarityIdleHighEnable Function
C
void PLIB_USART_SyncClockPolarityIdleHighEnable(
USART_MODULE_ID index
);
Description
This function sets the clock idle in the Synchronous mode to high.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Calling this function disables the clock polarity idle as low.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsSyncClockPolarity in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_SyncClockPolarityIdleHighEnable(MY_USART_INSTANCE);
5.6.25.5.1.16 PLIB_USART_SyncClockSourceSelect Function
C
void PLIB_USART_SyncClockSourceSelect(
USART_MODULE_ID index,
USART_SYNC_CLOCK_SOURCE source
);
Description
This function sets the clock source to either master or slave, which is only valid in Synchronous mode. The clock is generated
from the baud rate generator.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Calling this function disables the use of the slave as the clock source.
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This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsSyncClockSource in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_SyncClockSourceSelect(MY_USART_INSTANCE, USART_SYNC_CLOCK_SOURCE_MASTER);
5.6.25.5.1.17 PLIB_USART_SyncModeSelect Function
C
void PLIB_USART_SyncModeSelect(
USART_MODULE_ID index,
USART_SYNC_MODES mode
);
Description
This function enables the Asynchronous mode of the USART module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Calling this function disables the Synchronous mode of the USART module. By default, the module is in Asynchronous mode
after a reset.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsSyncMode in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_SyncModeSelect(MY_USART_INSTANCE, USART_ASYNC_MODE);
5.6.25.5.1.18 PLIB_USART_WakeOnStartDisable Function
C
void PLIB_USART_WakeOnStartDisable(
USART_MODULE_ID index
);
Description
This function disables the wake-up on start bit detection feature during Sleep mode.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsWakeOnStart in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_WakeOnStartDisable(MY_USART_INSTANCE);
5.6.25.5.1.19 PLIB_USART_WakeOnStartEnable Function
C
void PLIB_USART_WakeOnStartEnable(
USART_MODULE_ID index
);
Description
This function enables the wake-up on start feature during Sleep mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsWakeOnStart in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_WakeOnStartEnable(MY_USART_INSTANCE);
5.6.25.5.1.20 PLIB_USART_WakeOnStartIsEnabled Function
C
bool PLIB_USART_WakeOnStartIsEnabled(
USART_MODULE_ID index
);
Description
This function returns the status of the sync break event, when called after enabling using PLIB_USART_WakeOnStartEnable.
5.6 Peripheral Library Help MPLAB Harmony Help USART Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsWakeOnStart in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
//Call the interface just prior to entering the sleep mode.
PLIB_USART_WakeOnStartEnable(MY_USART_INSTANCE);
// Check the status if the Sync break event is over.
if(PLIB_USART_WakeOnStartIsEnabled(MY_USART_INSTANCE))
{
// Do Something
}
5.6.25.5.2 Baud Rate Generator Functions
5.6.25.5.2.1 PLIB_USART_BaudRateAutoDetectEnable Function
C
void PLIB_USART_BaudRateAutoDetectEnable(
USART_MODULE_ID index
);
Description
This function enables the baud rate measurement on the next character, which requires reception of the Sync character.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsBaudRateAutoDetect in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
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PLIB_USART_BaudRateAutoDetectEnable(MY_USART_INSTANCE);
// Wait till the baud rate is detected.
while(!PLIB_USART_BaudRateAutoDetectIsComplete(MY_USART_INSTANCE));
5.6.25.5.2.2 PLIB_USART_BaudRateAutoDetectIsComplete Function
C
bool PLIB_USART_BaudRateAutoDetectIsComplete(
USART_MODULE_ID index
);
Description
This function gets the state of the automatic baud detection and returns a '0' if the baud rate auto detection is complete.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Baud rate detection is not complete
• false - Baud rate detection is complete
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsBaudRateAutoDetect in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_BaudRateAutoDetectEnable(MY_USART_INSTANCE);
// Wait till the baud rate is detected.
while(!PLIB_USART_BaudRateAutoDetectIsComplete(MY_USART_INSTANCE));
5.6.25.5.2.3 PLIB_USART_BaudRateAutoDetectOverflowHasOccurred Function
C
bool PLIB_USART_BaudRateAutoDetectOverflowHasOccurred(
USART_MODULE_ID index
);
Description
This function identifies whether or not the automatic baud timer has overflowed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
• true - An auto-baud overflow has occurred
• false - An auto-baud overflow has not occurred
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsBaudRateAutoDetectOverflow in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
status = PLIB_USART_BaudRateAutoDetectOverflowHasOccurred(MY_USART_INSTANCE);
5.6.25.5.2.4 PLIB_USART_BaudRateGet Function
C
uint32_t PLIB_USART_BaudRateGet(
USART_MODULE_ID index,
int32_t clockFrequency
);
Description
This function gets the baud rate that is currently in use. The clock frequency needs to be passed to the function.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
clockFrequency Clock Frequency
Returns
BaudRate - Baud Rate Value
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsBaudRate in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
uint32_t baudRate ;
PLIB_USART_BaudRateSet(MY_USART_INSTANCE, MY_CLOCK_FREQUENCY, 9600);
baudRate = PLIB_USART_BaudRateGet(MY_USART_INSTANCE, MY_CLOCK_FREQUENCY);
5.6.25.5.2.5 PLIB_USART_BaudRateHighDisable Function
C
void PLIB_USART_BaudRateHighDisable(
USART_MODULE_ID index
);
Description
This function disables the high baud rate selection.
5.6 Peripheral Library Help MPLAB Harmony Help USART Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsBaudRateHigh in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_BaudRateHighDisable(MY_USART_INSTANCE);
5.6.25.5.2.6 PLIB_USART_BaudRateHighEnable Function
C
void PLIB_USART_BaudRateHighEnable(
USART_MODULE_ID index
);
Description
This function enables high baud rate selection.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsBaudRateHigh in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_BaudRateHighEnable(MY_USART_INSTANCE);
5.6.25.5.2.7 PLIB_USART_BaudRateHighSet Function
C
void PLIB_USART_BaudRateHighSet(
USART_MODULE_ID index,
uint32_t clockFrequency,
uint32_t baudRate
5.6 Peripheral Library Help MPLAB Harmony Help USART Peripheral Library
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);
Description
This function sets the baud rate to the desired value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
baudRate Baud Rate Value, it is the baud rate value
clockFrequency Clock Frequency
Returns
None.
Remarks
Setting a new baud rate value causes the baud rate timer to reset. This ensures that the baud rate timer does not have to
overflow before outputting the new baud rate.
If the system clock is changed during an active receive operation, a receiver error or data loss may result. To avoid this issue
verify that no receptions are in progress before changing the system clock.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsBaudRateHigh in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
uint32_t baudRateValue ;
PLIB_USART_BaudRateHighSet(MY_USART_INSTANCE, MY_CLOCK_FREQUENCY, 9600);
baudRateValue = PLIB_USART_BaudRateGet(MY_USART_INSTANCE, MY_CLOCK_FREQUENCY);
5.6.25.5.2.8 PLIB_USART_BaudRateModeSelect Function
C
void PLIB_USART_BaudRateModeSelect(
USART_MODULE_ID index,
USART_BAUD_RATE_MODE mode
);
Description
This function enables the 16-bit Baud Rate Generator.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
mode Baud rate mode
Returns
None.
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Remarks
Calling this function disables the 8-bit Baud Rate Generator. The 16-bit mode is used to achieve a slow baud rate for fast
oscillator frequencies.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsBaudRateBitMode in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_BaudRateModeSelect(MY_USART_INSTANCE, USART_BAUD_RATE_16_BIT_MODE);
5.6.25.5.2.9 PLIB_USART_BaudRateSet Function
C
void PLIB_USART_BaudRateSet(
USART_MODULE_ID index,
uint32_t clockFrequency,
uint32_t baudRate
);
Description
This function sets the baud rate to the desired value.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
baudRate Baud Rate Value
clockFrequency Clock Frequency
Returns
None.
Remarks
Setting a new baud rate value causes the baud rate timer to reset. This ensures that the baud rate timer does not have to
overflow before outputting the new baud rate.
If the system clock is changed during an active receive operation, a receiver error or data loss may result. To avoid this issue
verify that no receptions are in progress before changing the system clock.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsBaudRate in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
uint32_t baudRateValue ;
PLIB_USART_BaudRateSet(MY_USART_INSTANCE, MY_CLOCK_FREQUENCY, 9600);
baudRateValue = PLIB_USART_BaudRateGet(MY_USART_INSTANCE, MY_CLOCK_FREQUENCY);
5.6.25.5.3 Transmitter Functions
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5.6.25.5.3.1 PLIB_USART_Transmitter9BitsSend Function
C
void PLIB_USART_Transmitter9BitsSend(
USART_MODULE_ID index,
int8_t data,
bool Bit9th
);
Description
The data is transmitted in the byte mode for the specified USART module, with 9th bit.
Preconditions
The USART module should be configured to use the 9 data bits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
data Data to be transmitted.
9thBit 9th bit of the data to be transmitted.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitter9BitsSend in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
uint8_t data = 'a';
if(!PLIB_USART_TransmitterBufferIsFull(MY_USART_INSTANCE))
{
PLIB_USART_Transmitter9BitsSend(MY_USART_INSTANCE, data, false);
}
5.6.25.5.3.2 PLIB_USART_TransmitterBreakSend Function
C
void PLIB_USART_TransmitterBreakSend(
USART_MODULE_ID index
);
Description
This function transmits the break character.
Preconditions
The application should wait for the transmitter to be idle, before calling this function.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
None.
Remarks
After the break has been transmitted, the application can start transmitting next bytes.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitterBreak in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
// Wait for the Transmit buffer to be empty.
while(PLIB_USART_TransmitterBufferIsFull(MY_USART_INSTANCE));
// Transmit the break character.
PLIB_USART_TransmitterBreakSend(MY_USART_INSTANCE);
// wait for the break transmission to complete
while(!PLIB_USART_TransmitterBreakSendIsComplete(MY_USART_INSTANCE));
5.6.25.5.3.3 PLIB_USART_TransmitterBreakSendIsComplete Function
C
bool PLIB_USART_TransmitterBreakSendIsComplete(
USART_MODULE_ID index
);
Description
The function returns the status of the break transmission.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - Transmit Break on the next transmission
• false - Break Transmission completed or not started
Remarks
After the break has been transmitted, the application can start transmitting next bytes.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitterBreak in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
// Wait for the Transmit buffer to be empty.
while(PLIB_USART_TransmitterBufferIsFull(MY_USART_INSTANCE));
// Transmit the break character.
PLIB_USART_TransmitterBreakSend(MY_USART_INSTANCE);
// wait for the break transmission to complete
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while(!PLIB_USART_TransmitterBreakSendIsComplete(MY_USART_INSTANCE));
5.6.25.5.3.4 PLIB_USART_TransmitterBufferIsFull Function
C
bool PLIB_USART_TransmitterBufferIsFull(
USART_MODULE_ID index
);
Description
Gets the transmit status of the specified USART module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - The transmit buffer is full
• false - The transmit buffer is not full, at least one more character can be written.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitterBufferFullStatus in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
// Wait for the Transmit buffer to be empty.
while(PLIB_USART_TransmitterBufferIsFull(MY_USART_INSTANCE));
// Transmit the break character.
PLIB_USART_TransmitterBreakSend(MY_USART_INSTANCE);
5.6.25.5.3.5 PLIB_USART_TransmitterByteSend Function
C
void PLIB_USART_TransmitterByteSend(
USART_MODULE_ID index,
int8_t data
);
Description
The data is transmitted in the Byte mode for the specified USART module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
data Data to be transmitted.
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitter in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
uint8_t data = 'a';
if(!PLIB_USART_TransmitterBufferIsFull(MY_USART_INSTANCE))
{
PLIB_USART_TransmitterByteSend(MY_USART_INSTANCE, data);
}
5.6.25.5.3.6 PLIB_USART_TransmitterDisable Function
C
void PLIB_USART_TransmitterDisable(
USART_MODULE_ID index
);
Description
This function disables the specific USART module transmitter.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
Disabling the transmitter during a transmission will cause the transmission to be aborted.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitterEnable in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_TransmitterDisable(MY_USART_INSTANCE);
5.6.25.5.3.7 PLIB_USART_TransmitterEnable Function
C
void PLIB_USART_TransmitterEnable(
USART_MODULE_ID index
);
Description
This function enables the specific USART module transmitter.
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Preconditions
The USART module should be enabled using the function PLIB_USART_Enable before this function is called.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
The transmitter should not be enabled until the USART is enabled. The transmissions will not be enabled otherwise.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitterEnable in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_TransmitterEnable(MY_USART_INSTANCE);
5.6.25.5.3.8 PLIB_USART_TransmitterIdleIsLowDisable Function
C
void PLIB_USART_TransmitterIdleIsLowDisable(
USART_MODULE_ID index
);
Description
This function disables the Transmit Idle Low state. In USART Synchronous mode, this function configures that the TX polarity the
idle state is high.
When IrDA is enabled, this function sets the IrDA encoded Transmit Idle state to a '0'.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitterIdleIsLow in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_TransmitterIdleIsLowDisable(MY_USART_INSTANCE);
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5.6.25.5.3.9 PLIB_USART_TransmitterIdleIsLowEnable Function
C
void PLIB_USART_TransmitterIdleIsLowEnable(
USART_MODULE_ID index
);
Description
This function enables the Transmit Idle Low state. In the USART Synchronous mode, this function configures that the TX
polarity, the idle state is low.
When IrDA(c) is enabled, this function sets that IrDA encoded Transmit Idle state to a '1'.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitterIdleIsLow in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_TransmitterIdleIsLowEnable(MY_USART_INSTANCE);
5.6.25.5.3.10 PLIB_USART_TransmitterInterruptModeSelect Function
C
void PLIB_USART_TransmitterInterruptModeSelect(
USART_MODULE_ID index,
USART_TRANSMIT_INTR_MODE fifolevel
);
Description
This function sets the condition in which the USART module should generate an interrupt.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
interruptMode Interrupt mode; for possible configurations, refer to
USART_TRANSMIT_INTR_MODE
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitterInterruptMode in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_TransmitterInterruptModeSelect(MY_USART_INSTANCE,
USART_TRANSMIT_FIFO_EMPTY );
5.6.25.5.3.11 PLIB_USART_TransmitterIsEmpty Function
C
bool PLIB_USART_TransmitterIsEmpty(
USART_MODULE_ID index
);
Description
This function gets the transmit shift register empty status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - The transmit shift register is empty
• false - The transmit shift register is not empty
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitterEmptyStatus in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
// Wait for the Transmit buffer to be empty.
while(!PLIB_USART_TransmitterIsEmpty(MY_USART_INSTANCE));
// Transmit the break character.
PLIB_USART_TransmitterBreakSend(MY_USART_INSTANCE);
5.6.25.5.3.12 PLIB_USART_TransmitterIsIdle Function
C
bool PLIB_USART_TransmitterIsIdle(
USART_MODULE_ID index
);
Description
This function gets the transmit buffer full status.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - The transmitter is idle
• false - The transmitter is not idle
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsTransmitterIdleStatus in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
status = PLIB_USART_TransmitterIsIdle(MY_USART_INSTANCE);
5.6.25.5.4 Receiver Functions
5.6.25.5.4.1 PLIB_USART_ReceiverAddressAutoDetectDisable Function
C
void PLIB_USART_ReceiverAddressAutoDetectDisable(
USART_MODULE_ID index
);
Description
This function disables the automatic Address Detect mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverAddressAutoDetect in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_ReceiverAddressAutoDetectDisable(MY_USART_INSTANCE);
5.6.25.5.4.2 PLIB_USART_ReceiverAddressAutoDetectEnable Function
C
void PLIB_USART_ReceiverAddressAutoDetectEnable(
USART_MODULE_ID index,
int8_t Mask
5.6 Peripheral Library Help MPLAB Harmony Help USART Peripheral Library
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);
Description
This function configures the automatic Address Detect mode. Uses the mask as the address character for automatic address
detection.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Mask Address character to be used, when enabled
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverAddressAutoDetect in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_ReceiverAddressAutoDetectEnable(MY_USART_INSTANCE,
MY_DEVICE_ADDRESS);
5.6.25.5.4.3 PLIB_USART_ReceiverAddressDetectDisable Function
C
void PLIB_USART_ReceiverAddressDetectDisable(
USART_MODULE_ID index
);
Description
This function disables the Address Detect mode. If it is enabled, and the device is addressed, disable the Address Detect mode
to continue receiving bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
All bytes are received, and the 9th bit can be used as the parity bit. By default, the address detect is disabled.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverAddressDetect in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
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PLIB_USART_ReceiverAddressDetectDisable(MY_USART_INSTANCE);
5.6.25.5.4.4 PLIB_USART_ReceiverAddressDetectEnable Function
C
void PLIB_USART_ReceiverAddressDetectEnable(
USART_MODULE_ID index
);
Description
This function enables the Address Detect mode. If it is enabled, and the device is addressed, disable the Address Detect mode
to continue receiving bytes.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
If 9 data bits are not selected, this bit has no effect.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverAddressDetect in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_ReceiverAddressDetectEnable(MY_USART_INSTANCE);
5.6.25.5.4.5 PLIB_USART_ReceiverAddressIsReceived Function
C
bool PLIB_USART_ReceiverAddressIsReceived(
USART_MODULE_ID index
);
Description
Checks and return if the data received is an address. The address has the 9th bit set. If data received, has 9th bit set, function
returns true, else returns false.
Preconditions
The USART module should be configured to use the 9 data bits.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - if the data received has the 9th bit set
• false - if the address received has the 9th bit cleared
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverAddressDetect in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
int8_t address;
if(PLIB_USART_ReceiverAddressIsReceived(MY_USART_INSTANCE))
{
address = PLIB_USART_ReceiverByteReceive(MY_USART_INSTANCE);
}
5.6.25.5.4.6 PLIB_USART_ReceiverByteReceive Function
C
int8_t PLIB_USART_ReceiverByteReceive(
USART_MODULE_ID index
);
Description
The data to be received in Byte mode from the specified USART module. Call the functions
PLIB_USART_ReceiverFramingErrorHasOccurred, PLIB_USART_ReceiverParityErrorHasOccurred and
PLIB_USART_ReceiverOverrunHasOccurred to get any error that occurred.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
data - Data to be received.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiver in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
bool isError;
uint8_t mydata;
if(PLIB_USART_ReceiverDataIsAvailable(MY_USART_INSTANCE))
{
mydata = PLIB_USART_ReceiverByteReceive(MY_USART_INSTANCE);
}
isError = PLIB_USART_ReceiverFramingErrorHasOccurred(MY_USART_INSTANCE) |
PLIB_USART_ReceiverParityErrorHasOccurred(MY_USART_INSTANCE) |
PLIB_USART_ReceiverOverrunHasOccurred(MY_USART_INSTANCE);
if(PLIB_USART_ReceiverOverrunHasOccurred(MY_USART_INSTANCE))
{
PLIB_USART_ReceiverOverrunErrorClear(MY_USART_INSTANCE);
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}
5.6.25.5.4.7 PLIB_USART_ReceiverDataIsAvailable Function
C
bool PLIB_USART_ReceiverDataIsAvailable(
USART_MODULE_ID index
);
Description
This function identifies if the receive data is available for the specified USART module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - The data is available
• false - The data is not available
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverDataAvailableStatus in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
int8_t mydata;
if(PLIB_USART_ReceiverDataIsAvailable(MY_USART_INSTANCE))
{
mydata = PLIB_USART_ReceiverByteReceive(MY_USART_INSTANCE);
}
5.6.25.5.4.8 PLIB_USART_ReceiverDisable Function
C
void PLIB_USART_ReceiverDisable(
USART_MODULE_ID index
);
Description
This function disables the USART receiver.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverEnable in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_ReceiverDisable(MY_USART_INSTANCE);
5.6.25.5.4.9 PLIB_USART_ReceiverEnable Function
C
void PLIB_USART_ReceiverEnable(
USART_MODULE_ID index
);
Description
This function enables the USART receiver.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverEnable in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_ReceiverEnable(MY_USART_INSTANCE);
5.6.25.5.4.10 PLIB_USART_ReceiverFramingErrorHasOccurred Function
C
bool PLIB_USART_ReceiverFramingErrorHasOccurred(
USART_MODULE_ID index
);
Description
This function gets the framing error status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
• true - The framing error was detected on the current character
• false - The framing error was not detected on the current character
Remarks
Reading the error clears the error.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverFramingErrorStatus in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
status = PLIB_USART_ReceiverFramingErrorHasOccurred(MY_USART_INSTANCE);
5.6.25.5.4.11 PLIB_USART_ReceiverIdleStateLowDisable Function
C
void PLIB_USART_ReceiverIdleStateLowDisable(
USART_MODULE_ID index
);
Description
This function disables receive polarity inversion. In the USART Synchronous mode, this function configures that the data is not
inverted.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverIdleStateLowEnable in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_ReceiverIdleStateLowDisable(MY_USART_INSTANCE);
5.6.25.5.4.12 PLIB_USART_ReceiverIdleStateLowEnable Function
C
void PLIB_USART_ReceiverIdleStateLowEnable(
USART_MODULE_ID index
);
Description
This function enables receive polarity inversion. In the USART Synchronous mode, this function configures that the data is
inverted.
5.6 Peripheral Library Help MPLAB Harmony Help USART Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverIdleStateLowEnable in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_ReceiverIdleStateLowEnable(MY_USART_INSTANCE);
5.6.25.5.4.13 PLIB_USART_ReceiverInterruptModeSelect Function
C
void PLIB_USART_ReceiverInterruptModeSelect(
USART_MODULE_ID index,
USART_RECEIVE_INTR_MODE interruptMode
);
Description
This function sets the USART receiver FIFO level.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
fifolevel For possible configurations, refer to USART_RECEIVE_INTR_MODE
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverInterruptMode in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_ReceiverInterruptModeSelect(MY_USART_INSTANCE,
USART_RECEIVE_FIFO_ONE_CHAR );
5.6.25.5.4.14 PLIB_USART_ReceiverIsIdle Function
C
bool PLIB_USART_ReceiverIsIdle(
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USART_MODULE_ID index
);
Description
This function identifies if the receiver is idle.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - The receive buffer is idle
• false - The receive buffer is not idle
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverIdleStatus in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
int8_t mydata;
if(PLIB_USART_ReceiverIsIdle(MY_USART_INSTANCE))
{
mydata = PLIB_USART_ReceiverByteReceive(MY_USART_INSTANCE);
}
5.6.25.5.4.15 PLIB_USART_ReceiverModeSelect Function
C
void PLIB_USART_ReceiverModeSelect(
USART_MODULE_ID index,
USART_RECEIVE_MODES mode
);
Description
This function disables Single Receive mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This function has no effect during Asynchronous mode, or in the Synchronous Slave mode. By default, the single receive is
disabled after a reset.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_USART_ExistsReceiverMode in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
PLIB_USART_ReceiverModeSelect(MY_USART_INSTANCE, USART_RECEIVE_MODE_SINGLE);
5.6.25.5.4.16 PLIB_USART_ReceiverOverrunErrorClear Function
C
void PLIB_USART_ReceiverOverrunErrorClear(
USART_MODULE_ID index
);
Description
Clears an overrun error. Clearing the error, resets the receive buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
WARNING: Calling this API will clear all the previously received data.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverOverrunStatus in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
if(PLIB_USART_ReceiverOverrunHasOccurred(MY_USART_INSTANCE))
{
PLIB_USART_ReceiverOverrunErrorClear(MY_USART_INSTANCE);
}
5.6.25.5.4.17 PLIB_USART_ReceiverOverrunHasOccurred Function
C
bool PLIB_USART_ReceiverOverrunHasOccurred(
USART_MODULE_ID index
);
Description
This function identifies if there was a receiver overrun error.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
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Returns
• true - The receive buffer has overflowed
• false - The receive buffer has not overflowed
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverOverrunStatus in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
if(PLIB_USART_ReceiverOverrunHasOccurred(MY_USART_INSTANCE))
{
PLIB_USART_ReceiverOverrunErrorClear(MY_USART_INSTANCE);
}
5.6.25.5.4.18 PLIB_USART_ReceiverParityErrorHasOccurred Function
C
bool PLIB_USART_ReceiverParityErrorHasOccurred(
USART_MODULE_ID index
);
Description
This function gets the parity error status.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - The parity error was detected on the current character
• false - The parity error was not detected on the current character
Remarks
Reading the error clears the error.
A Parity error is irrelevant in case of 9-bit mode.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USART_ExistsReceiverParityErrorStatus in your application to determine whether this feature is available.
Example
#define MY_USART_INSTANCE USART_ID_1
status = PLIB_USART_ReceiverParityErrorHasOccurred(MY_USART_INSTANCE);
5.6.25.5.5 Data Types and Constants
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5.6.25.5.5.1 USART_BAUD_RATE_MODE Enumeration
C
typedef enum {
USART_BAUD_RATE_8_BIT_MODE,
USART_BAUD_RATE_16_BIT_MODE
} USART_BAUD_RATE_MODE;
Description
/* USART Baud rate mode
This enumeration lists the USART baud rate modes.
Members
Members Description
USART_BAUD_RATE_8_BIT_MODE Baud rate register is 8 bit
USART_BAUD_RATE_16_BIT_MODE Baud rate register is 16 bit
Remarks
None.
5.6.25.5.5.2 USART_HANDSHAKE_MODE Enumeration
C
typedef enum {
USART_HANDSHAKE_MODE_FLOW_CONTROL,
USART_HANDSHAKE_MODE_SIMPLEX
} USART_HANDSHAKE_MODE;
Description
/* USART Handshake modes
This enumeration lists the USART handshake modes.
Members
Members Description
USART_HANDSHAKE_MODE_FLOW_CONTROL Enables flow control
USART_HANDSHAKE_MODE_SIMPLEX Enables simplex mode communication, no flow control
Remarks
None.
5.6.25.5.5.3 USART_LINECONTROL_MODE Enumeration
C
typedef enum {
USART_8N1,
USART_8E1,
USART_8O1,
USART_8N2,
USART_8E2,
USART_8O2,
USART_9N1,
USART_9N2
} USART_LINECONTROL_MODE;
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Description
Data Flow configuration
This data type defines the different configurations by which the USART can be configured for the data flow.
Members
Members Description
USART_8N1 8 Data Bits, No Parity,one Stop Bit
USART_8E1 8 Data Bits, Even Parity, 1 stop bit
USART_8O1 8 Data Bits, odd Parity, 1 stop bit
USART_8N2 8 Data Bits, No Parity,two Stop Bits
USART_8E2 8 Data Bits, Even Parity, 2 stop bits
USART_8O2 8 Data Bits, odd Parity, 2 stop bits
USART_9N1 9 Data Bits, No Parity, 1 stop bit
USART_9N2 9 Data Bits, No Parity, 2 stop bits
Remarks
None.
5.6.25.5.5.4 USART_MODULE_ID Enumeration
C
typedef enum {
USART_ID_1,
USART_ID_2,
USART_ID_3,
USART_ID_4,
USART_ID_5,
USART_ID_6,
USART_NUMBER_OF_MODULES
} USART_MODULE_ID;
Description
Enumeration: USART_MODULE_ID
This enumeration defines the number of modules that are available on the microcontroller. This is the superset of all of the
possible instances that might be available on Microchip microcontrollers.
Refer to the data sheet to get the correct number of modules defined for desired microcontroller.
Members
Members Description
USART_ID_1 USART 1
USART_ID_2 USART 2
USART_ID_3 USART 3
USART_ID_4 USART 4
USART_ID_5 USART 5
USART_ID_6 USART 6
USART_NUMBER_OF_MODULES Total number of USART modules available
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5.6.25.5.5.5 USART_OPERATION_MODE Enumeration
C
typedef enum {
USART_ENABLE_TX_RX_BCLK_USED,
USART_ENABLE_TX_RX_CTS_RTS_USED,
USART_ENABLE_TX_RX_RTS_USED,
USART_ENABLE_TX_RX_USED
} USART_OPERATION_MODE;
Description
Enable configuration
This data type defines the different configurations by which the USART can be enabled.
Members
Members Description
USART_ENABLE_TX_RX_BCLK_USED TX, RX and BCLK pins are used by USART module
USART_ENABLE_TX_RX_CTS_RTS_USED TX, RX, CTS and RTS pins are used by USART module
USART_ENABLE_TX_RX_RTS_USED TX, RX and RTS pins are used by USART module
USART_ENABLE_TX_RX_USED TX and RX pins are used by USART module
Remarks
The actual definition of this enumeration is device-specific.
5.6.25.5.5.6 USART_RECEIVE_INTR_MODE Enumeration
C
typedef enum {
USART_RECEIVE_FIFO_HALF_FULL,
USART_RECEIVE_FIFO_3B4FULL,
USART_RECEIVE_FIFO_ONE_CHAR
} USART_RECEIVE_INTR_MODE;
Description
Receive Interrupt mode configuration
This data type defining the different Receive FIFO levels by which the USART receive interrupt modes can be configured.
Members
Members Description
USART_RECEIVE_FIFO_HALF_FULL Interrupt when receive buffer is half full
USART_RECEIVE_FIFO_3B4FULL Interrupt when receive buffer is 3/4 full
USART_RECEIVE_FIFO_ONE_CHAR Interrupt when a character is received
Remarks
None.
5.6.25.5.5.7 USART_RECEIVE_MODES Enumeration
C
typedef enum {
USART_RECEIVE_MODE_CONTINUOUS,
USART_RECEIVE_MODE_SINGLE,
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USART_RECEIVE_MODES_NONE
} USART_RECEIVE_MODES;
Description
/* USART Receive modes
This enumeration lists the USART receive modes.
Members
Members Description
USART_RECEIVE_MODE_CONTINUOUS Continuous Receive mode
USART_RECEIVE_MODE_SINGLE Single Receive mode
USART_RECEIVE_MODES_NONE No Receive mode
Remarks
This enumeration may not exist for all devices.
5.6.25.5.5.8 USART_SYNC_CLOCK_SOURCE Enumeration
C
typedef enum {
USART_SYNC_CLOCK_SOURCE_MASTER,
USART_SYNC_CLOCK_SOURCE_SLAVE
} USART_SYNC_CLOCK_SOURCE;
Description
/* USART Clock sources
This enumeration lists the USART clock sources.
Members
Members Description
USART_SYNC_CLOCK_SOURCE_MASTER USART clock source is from master
USART_SYNC_CLOCK_SOURCE_SLAVE USART clock source is from slave
Remarks
None.
5.6.25.5.5.9 USART_SYNC_MODES Enumeration
C
typedef enum {
USART_ASYNC_MODE,
USART_SYNC_MODE
} USART_SYNC_MODES;
Description
/* USART Synchronisation Modes
Lists enumerations selecting asynchronous communication or synchronous communication.
Members
Members Description
USART_ASYNC_MODE Normal UART. Asynchronous
USART_SYNC_MODE Synchronous
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Remarks
This enumeration is not used for devices which does not have the synchronous communication option (i.e., always
asynchronous).
5.6.25.5.5.10 USART_TRANSMIT_INTR_MODE Enumeration
C
typedef enum {
USART_TRANSMIT_FIFO_EMPTY,
USART_TRANSMIT_FIFO_FULL,
USART_TRANSMIT_FIFO_IDLE,
USART_TRANSMIT_FIFO_NOT_FULL
} USART_TRANSMIT_INTR_MODE;
Description
/* Transmit Interrupt mode configuration
This data type defining the different transmit FIFO levels by which the USART transmit interrupt modes can be configured.
Members
Members Description
USART_TRANSMIT_FIFO_EMPTY Interrupt when the transmit buffer becomes empty
USART_TRANSMIT_FIFO_FULL Interrupt when the last transmission is over and all transmit operations are
completed
USART_TRANSMIT_FIFO_IDLE Interrupt when all characters are transmitted
USART_TRANSMIT_FIFO_NOT_FULL Interrupt when atleast one location is empty in the transmit buffer
Remarks
None.
5.6.25.5.6 Feature Existence Functions
5.6.25.5.6.1 PLIB_USART_ExistsAlternateIO Function
C
bool PLIB_USART_ExistsAlternateIO(
USART_MODULE_ID index
);
Description
This function identifies whether the AlternateIOEnableControl feature is available on the USART module. When this function
returns true, these functions are supported on the device:
• PLIB_USART_AlternateIOEnable
• PLIB_USART_AlternateIODisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The AlternateIOEnableControl feature is supported on the device
• false - The AlternateIOEnableControl feature is not supported on the device
Remarks
None.
5.6.25.5.6.2 PLIB_USART_ExistsBaudRate Function
C
bool PLIB_USART_ExistsBaudRate(
USART_MODULE_ID index
);
Description
This function identifies whether the BaudRate feature is available on the USART module. When this function returns true, these
functions are supported on the device:
• PLIB_USART_BaudRateSet
• PLIB_USART_BaudRateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BaudRate feature is supported on the device
• false - The BaudRate feature is not supported on the device
Remarks
None.
5.6.25.5.6.3 PLIB_USART_ExistsBaudRateAutoDetect Function
C
bool PLIB_USART_ExistsBaudRateAutoDetect(
USART_MODULE_ID index
);
Description
This function identifies whether the BaudRateAutoDetect feature is available on the USART module. When this function returns
true, these functions are supported on the device:
• PLIB_USART_BaudRateAutoDetectEnable
• PLIB_USART_BaudRateAutoDetectIsComplete
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BaudRateAutoDetect feature is supported on the device
• false - The BaudRateAutoDetect feature is not supported on the device
Remarks
None.
5.6.25.5.6.4 PLIB_USART_ExistsBaudRateAutoDetectOverflow Function
C
bool PLIB_USART_ExistsBaudRateAutoDetectOverflow(
USART_MODULE_ID index
);
Description
This function identifies whether the BaudRateAutoDetectOverflow feature is available on the USART module. When this function
returns true, this function is supported on the device:
• PLIB_USART_BaudRateAutoDetectOverflowHasOccurred
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BaudRateAutoDetectOverflow feature is supported on the device
• false - The BaudRateAutoDetectOverflow feature is not supported on the device
Remarks
None.
5.6.25.5.6.5 PLIB_USART_ExistsBaudRateBitMode Function
C
bool PLIB_USART_ExistsBaudRateBitMode(
USART_MODULE_ID index
);
Description
This function identifies whether the BaudRateMode feature is available on the USART module. When this function returns true,
this function is supported on the device:
• PLIB_USART_BaudRateModeSelect
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BaudRateMode feature is supported on the device
• false - The BaudRateMode feature is not supported on the device
Remarks
None.
5.6.25.5.6.6 PLIB_USART_ExistsBaudRateHigh Function
C
bool PLIB_USART_ExistsBaudRateHigh(
USART_MODULE_ID index
);
Description
This function identifies whether the BaudRateHigh feature is available on the USART module. When this function returns true,
these functions are supported on the device:
• PLIB_USART_BaudRateHighSet
• PLIB_USART_BaudRateHighDisable
• PLIB_USART_BaudRateHighEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BaudRateHigh feature is supported on the device
• false - The BaudRateHigh feature is not supported on the device
Remarks
None.
5.6.25.5.6.7 PLIB_USART_ExistsEnable Function
C
bool PLIB_USART_ExistsEnable(
USART_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the USART module. When this function returns true,
these functions are supported on the device:
• PLIB_USART_Disable
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• PLIB_USART_Enable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EnableControl feature is supported on the device
• false - The EnableControl feature is not supported on the device
Remarks
None.
5.6.25.5.6.8 PLIB_USART_ExistsHandshakeMode Function
C
bool PLIB_USART_ExistsHandshakeMode(
USART_MODULE_ID index
);
Description
This function identifies whether the HandShakeMode feature is available on the USART module. When this function returns true,
this function is supported on the device:
• PLIB_USART_HandshakeModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The HandShakeMode feature is supported on the device
• false - The HandShakeMode feature is not supported on the device
Remarks
None.
5.6.25.5.6.9 PLIB_USART_ExistsIrDA Function
C
bool PLIB_USART_ExistsIrDA(
USART_MODULE_ID index
);
Description
This function identifies whether the IrDAControl feature is available on the USART module. When this function returns true, these
functions are supported on the device:
• PLIB_USART_IrDADisable
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• PLIB_USART_IrDAEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The IrDAControl feature is supported on the device
• false - The IrDAControl feature is not supported on the device
Remarks
None.
5.6.25.5.6.10 PLIB_USART_ExistsLineControlMode Function
C
bool PLIB_USART_ExistsLineControlMode(
USART_MODULE_ID index
);
Description
This function identifies whether the LineControlMode feature is available on the USART module. When this function returns true,
this function is supported on the device:
• PLIB_USART_LineControlModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LineControlMode feature is supported on the device
• false - The LineControlMode feature is not supported on the device
Remarks
None.
5.6.25.5.6.11 PLIB_USART_ExistsLoopback Function
C
bool PLIB_USART_ExistsLoopback(
USART_MODULE_ID index
);
Description
This function identifies whether the Loopback feature is available on the USART module. When this function returns true, these
functions are supported on the device:
• PLIB_USART_LoopbackEnable
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• PLIB_USART_LoopbackDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Loopback feature is supported on the device
• false - The Loopback feature is not supported on the device
Remarks
None.
5.6.25.5.6.12 PLIB_USART_ExistsOperationMode Function
C
bool PLIB_USART_ExistsOperationMode(
USART_MODULE_ID index
);
Description
This function identifies whether the OperationMode feature is available on the USART module. When this function returns true,
this function is supported on the device:
• PLIB_USART_OperationModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OperationMode feature is supported on the device
• false - The OperationMode feature is not supported on the device
Remarks
None.
5.6.25.5.6.13 PLIB_USART_ExistsReceiver Function
C
bool PLIB_USART_ExistsReceiver(
USART_MODULE_ID index
);
Description
This function identifies whether the Receiver feature is available on the USART module. When this function returns true, this
function is supported on the device:
• PLIB_USART_ReceiverByteReceive
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Receiver feature is supported on the device
• false - The Receiver feature is not supported on the device
Remarks
None.
5.6.25.5.6.14 PLIB_USART_ExistsReceiverAddressAutoDetect Function
C
bool PLIB_USART_ExistsReceiverAddressAutoDetect(
USART_MODULE_ID index
);
Description
This function identifies whether the ReceiverAddressAutoDetect feature is available on the USART module. When this function
returns true, these functions are supported on the device:
• PLIB_USART_ReceiverAddressAutoDetectEnable
• PLIB_USART_ReceiverAddressAutoDetectDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverAddressAutoDetect feature is supported on the device
• false - The ReceiverAddressAutoDetect feature is not supported on the device
Remarks
None.
5.6.25.5.6.15 PLIB_USART_ExistsReceiverAddressDetect Function
C
bool PLIB_USART_ExistsReceiverAddressDetect(
USART_MODULE_ID index
);
Description
This function identifies whether the ReceiverAddressDetect feature is available on the USART module. When this function
returns true, these functions are supported on the device:
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• PLIB_USART_ReceiverAddressDetectEnable
• PLIB_USART_ReceiverAddressDetectDisable
• PLIB_USART_ReceiverAddressIsReceived
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverAddressDetect feature is supported on the device
• false - The ReceiverAddressDetect feature is not supported on the device
Remarks
None.
5.6.25.5.6.16 PLIB_USART_ExistsReceiverDataAvailableStatus Function
C
bool PLIB_USART_ExistsReceiverDataAvailableStatus(
USART_MODULE_ID index
);
Description
This function identifies whether the ReceiverDataAvailable feature is available on the USART module. When this function returns
true, this function is supported on the device:
• PLIB_USART_ReceiverDataIsAvailable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverDataAvailable feature is supported on the device
• false - The ReceiverDataAvailable feature is not supported on the device
Remarks
None.
5.6.25.5.6.17 PLIB_USART_ExistsReceiverEnable Function
C
bool PLIB_USART_ExistsReceiverEnable(
USART_MODULE_ID index
);
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Description
This function identifies whether the ReceiverEnableControl feature is available on the USART module. When this function
returns true, these functions are supported on the device:
• PLIB_USART_ReceiverEnable
• PLIB_USART_ReceiverDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverEnableControl feature is supported on the device
• false - The ReceiverEnableControl feature is not supported on the device
Remarks
None.
5.6.25.5.6.18 PLIB_USART_ExistsReceiverFramingErrorStatus Function
C
bool PLIB_USART_ExistsReceiverFramingErrorStatus(
USART_MODULE_ID index
);
Description
This function identifies whether the ReceiverFramingError feature is available on the USART module. When this function returns
true, this function is supported on the device:
• PLIB_USART_ReceiverFramingErrorHasOccurred
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverFramingError feature is supported on the device
• false - The ReceiverFramingError feature is not supported on the device
Remarks
None.
5.6.25.5.6.19 PLIB_USART_ExistsReceiverIdleStateLowEnable Function
C
bool PLIB_USART_ExistsReceiverIdleStateLowEnable(
USART_MODULE_ID index
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);
Description
This function identifies whether the ReceiverPolarityInvert feature is available on the USART module. When this function returns
true, these functions are supported on the device:
• PLIB_USART_ReceiverIdleStateLowEnable
• PLIB_USART_ReceiverIdleStateLowDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverPolarityInvert feature is supported on the device
• false - The ReceiverPolarityInvert feature is not supported on the device
Remarks
None.
5.6.25.5.6.20 PLIB_USART_ExistsReceiverIdleStatus Function
C
bool PLIB_USART_ExistsReceiverIdleStatus(
USART_MODULE_ID index
);
Description
This function identifies whether the ReceiverIdle feature is available on the USART module. When this function returns true, this
function is supported on the device:
• PLIB_USART_ReceiverIsIdle
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverIdle feature is supported on the device
• false - The ReceiverIdle feature is not supported on the device
Remarks
None.
5.6.25.5.6.21 PLIB_USART_ExistsReceiverInterruptMode Function
C
bool PLIB_USART_ExistsReceiverInterruptMode(
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USART_MODULE_ID index
);
Description
This function identifies whether the ReceiverInterruptMode feature is available on the USART module. When this function returns
true, this function is supported on the device:
• PLIB_USART_ReceiverInterruptModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverInterruptMode feature is supported on the device
• false - The ReceiverInterruptMode feature is not supported on the device
Remarks
None.
5.6.25.5.6.22 PLIB_USART_ExistsReceiverMode Function
C
bool PLIB_USART_ExistsReceiverMode(
USART_MODULE_ID index
);
Description
This function identifies whether the ReceiverMode feature is available on the USART module. When this function returns true,
this function is supported on the device:
• PLIB_USART_ReceiverModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverMode feature is supported on the device
• false - The ReceiverMode feature is not supported on the device
Remarks
None.
5.6.25.5.6.23 PLIB_USART_ExistsReceiverOverrunStatus Function
C
bool PLIB_USART_ExistsReceiverOverrunStatus(
USART_MODULE_ID index
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);
Description
This function identifies whether the ReceiverOverrunError feature is available on the USART module. When this function returns
true, these functions are supported on the device:
• PLIB_USART_ReceiverOverrunErrorClear
• PLIB_USART_ReceiverOverrunHasOccurred
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverOverrunError feature is supported on the device
• false - The ReceiverOverrunError feature is not supported on the device
Remarks
None.
5.6.25.5.6.24 PLIB_USART_ExistsReceiverParityErrorStatus Function
C
bool PLIB_USART_ExistsReceiverParityErrorStatus(
USART_MODULE_ID index
);
Description
This function identifies whether the ReceiverParityError feature is available on the USART module. When this function returns
true, this function is supported on the device:
• PLIB_USART_ReceiverParityErrorHasOccurred
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ReceiverParityError feature is supported on the device
• false - The ReceiverParityError feature is not supported on the device
Remarks
None.
5.6.25.5.6.25 PLIB_USART_ExistsStopInIdle Function
C
bool PLIB_USART_ExistsStopInIdle(
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USART_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the USART module. When this function returns true, these
functions are supported on the device:
• PLIB_USART_StopInIdleEnable
• PLIB_USART_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StopInIdle feature is supported on the device
• false - The StopInIdle feature is not supported on the device
Remarks
None.
5.6.25.5.6.26 PLIB_USART_ExistsSyncClockPolarity Function
C
bool PLIB_USART_ExistsSyncClockPolarity(
USART_MODULE_ID index
);
Description
This function identifies whether the SyncClockPolarity feature is available on the USART module. When this function returns
true, these functions are supported on the device:
• PLIB_USART_SyncClockPolarityIdleHighDisable
• PLIB_USART_SyncClockPolarityIdleHighEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SyncClockPolarity feature is supported on the device
• false - The SyncClockPolarity feature is not supported on the device
Remarks
None.
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5.6.25.5.6.27 PLIB_USART_ExistsSyncClockSource Function
C
bool PLIB_USART_ExistsSyncClockSource(
USART_MODULE_ID index
);
Description
This function identifies whether the SyncClockSource feature is available on the USART module. When this function returns true,
this function is supported on the device:
• PLIB_USART_SyncClockSourceSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SyncClockSource feature is supported on the device
• false - The SyncClockSource feature is not supported on the device
Remarks
None.
5.6.25.5.6.28 PLIB_USART_ExistsSyncMode Function
C
bool PLIB_USART_ExistsSyncMode(
USART_MODULE_ID index
);
Description
This function identifies whether the SyncMode feature is available on the USART module. When this function returns true, this
function is supported on the device:
• PLIB_USART_SyncModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SyncMode feature is supported on the device
• false - The SyncMode feature is not supported on the device
Remarks
None.
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5.6.25.5.6.29 PLIB_USART_ExistsTransmitter Function
C
bool PLIB_USART_ExistsTransmitter(
USART_MODULE_ID index
);
Description
This function identifies whether the Transmitter feature is available on the USART module. When this function returns true, this
function is supported on the device:
• PLIB_USART_TransmitterByteSend
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Transmitter feature is supported on the device
• false - The Transmitter feature is not supported on the device
Remarks
None.
5.6.25.5.6.30 PLIB_USART_ExistsTransmitter9BitsSend Function
C
bool PLIB_USART_ExistsTransmitter9BitsSend(
USART_MODULE_ID index
);
Description
This function identifies whether the Transmitter9Bits feature is available on the USART module. When this function returns true,
this function is supported on the device:
• PLIB_USART_Transmitter9BitsSend
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Transmitter9Bits feature is supported on the device
• false - The Transmitter9Bits feature is not supported on the device
Remarks
None.
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5.6.25.5.6.31 PLIB_USART_ExistsTransmitterBreak Function
C
bool PLIB_USART_ExistsTransmitterBreak(
USART_MODULE_ID index
);
Description
This function identifies whether the TransmitterBreak feature is available on the USART module. When this function returns true,
these functions are supported on the device:
• PLIB_USART_TransmitterBreakSend
• PLIB_USART_TransmitterBreakSendIsComplete
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitterBreak feature is supported on the device
• false - The TransmitterBreak feature is not supported on the device
Remarks
None.
5.6.25.5.6.32 PLIB_USART_ExistsTransmitterBufferFullStatus Function
C
bool PLIB_USART_ExistsTransmitterBufferFullStatus(
USART_MODULE_ID index
);
Description
This function identifies whether the TransmitterBufferFull feature is available on the USART module. When this function returns
true, these functions are supported on the device:
• PLIB_USART_TransmitterBufferIsFull
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitterBufferFull feature is supported on the device
• false - The TransmitterBufferFull feature is not supported on the device
Remarks
None.
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5.6.25.5.6.33 PLIB_USART_ExistsTransmitterEmptyStatus Function
C
bool PLIB_USART_ExistsTransmitterEmptyStatus(
USART_MODULE_ID index
);
Description
This function identifies whether the TransmitterEmpty feature is available on the USART module. When this function returns true,
these functions are supported on the device:
• PLIB_USART_TransmitterIsEmpty
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitterEmpty feature is supported on the device
• false - The TransmitterEmpty feature is not supported on the device
Remarks
None.
5.6.25.5.6.34 PLIB_USART_ExistsTransmitterEnable Function
C
bool PLIB_USART_ExistsTransmitterEnable(
USART_MODULE_ID index
);
Description
This function identifies whether the TransmitterEnableControl feature is available on the USART module. When this function
returns true, these functions are supported on the device:
• PLIB_USART_TransmitterEnable
• PLIB_USART_TransmitterDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitterEnableControl feature is supported on the device
• false - The TransmitterEnableControl feature is not supported on the device
Remarks
None.
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5.6.25.5.6.35 PLIB_USART_ExistsTransmitterIdleIsLow Function
C
bool PLIB_USART_ExistsTransmitterIdleIsLow(
USART_MODULE_ID index
);
Description
This function identifies whether the TransmitterIdleIsLow feature is available on the USART module. When this function returns
true, these functions are supported on the device:
• PLIB_USART_TransmitterIdleIsLowDisable
• PLIB_USART_TransmitterIdleIsLowEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitterIdleIsLow feature is supported on the device
• false - The TransmitterIdleIsLow feature is not supported on the device
Remarks
None.
5.6.25.5.6.36 PLIB_USART_ExistsTransmitterIdleStatus Function
C
bool PLIB_USART_ExistsTransmitterIdleStatus(
USART_MODULE_ID index
);
Description
This function identifies whether the TransmitterIdle feature is available on the USART module. When this function returns true,
this function is supported on the device:
• PLIB_USART_TransmitterIsIdle
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitterIdle feature is supported on the device
• false - The TransmitterIdle feature is not supported on the device
Remarks
None.
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5.6.25.5.6.37 PLIB_USART_ExistsTransmitterInterruptMode Function
C
bool PLIB_USART_ExistsTransmitterInterruptMode(
USART_MODULE_ID index
);
Description
This function identifies whether the TransmitterInterruptMode feature is available on the USART module. When this function
returns true, this function is supported on the device:
• PLIB_USART_TransmitterInterruptModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TransmitterInterruptMode feature is supported on the device
• false - The TransmitterInterruptMode feature is not supported on the device
Remarks
None.
5.6.25.5.6.38 PLIB_USART_ExistsWakeOnStart Function
C
bool PLIB_USART_ExistsWakeOnStart(
USART_MODULE_ID index
);
Description
This function identifies whether the WakeOnStart feature is available on the USART module. When this function returns true,
these functions are supported on the device:
• PLIB_USART_WakeOnStartEnable
• PLIB_USART_WakeOnStartDisable
• PLIB_USART_WakeOnStartIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WakeOnStart feature is supported on the device
• false - The WakeOnStart feature is not supported on the device
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Remarks
None.
5.6.25.6 Files
Files
Name Description
plib_usart.h Universal Synchronous/Asynchronous Receiver/Transmitter (USART) Peripheral
Library interface header for USART functions.
Description
5.6.25.6.1 plib_usart.h
USART Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
USART Peripheral Library for all families of Microchip microcontrollers. The functions in this file are common to the USART
module.
Functions
Name Description
PLIB_USART_AlternateIODisable Disables the use of alternate I/O pins for the receiver
and transmitter.
PLIB_USART_AlternateIOEnable Enables the use of alternate I/O pins for the receiver
and transmitter.
PLIB_USART_BaudRateAutoDetectEnable Enables baud rate measurement on the next character,
which requires reception of the Sync character.
PLIB_USART_BaudRateAutoDetectIsComplete Gets the state of the automatic baud detection.
PLIB_USART_BaudRateAutoDetectOverflowHasOccurred Identifies if the automatic baud timer has overflowed.
PLIB_USART_BaudRateGet Gets the baud rate current in use.
PLIB_USART_BaudRateHighDisable Disables the high baud rate selection.
PLIB_USART_BaudRateHighEnable Enables high baud rate selection.
PLIB_USART_BaudRateHighSet Sets the baud rate to the desired value.
PLIB_USART_BaudRateModeSelect Enables the 16-bit Baud Rate Generator (BRG).
PLIB_USART_BaudRateSet Sets the baud rate to the desired value.
PLIB_USART_Disable Disables the specific USART module
PLIB_USART_Enable Enables the specific USART module.
PLIB_USART_ExistsAlternateIO Identifies whether the AlternateIOEnableControl
feature exists on the USART module.
PLIB_USART_ExistsBaudRate Identifies whether the BaudRate feature exists on the
USART module.
PLIB_USART_ExistsBaudRateAutoDetect Identifies whether the BaudRateAutoDetect feature
exists on the USART module.
PLIB_USART_ExistsBaudRateAutoDetectOverflow Identifies whether the BaudRateAutoDetectOverflow
feature exists on the USART module.
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PLIB_USART_ExistsBaudRateBitMode Identifies whether the BaudRateMode feature exists on
the USART module.
PLIB_USART_ExistsBaudRateHigh Identifies whether the BaudRateHigh feature exists on
the USART module.
PLIB_USART_ExistsEnable Identifies whether the EnableControl feature exists on
the USART module.
PLIB_USART_ExistsHandshakeMode Identifies whether the HandShakeMode feature exists
on the USART module.
PLIB_USART_ExistsIrDA Identifies whether the IrDAControl feature exists on the
USART module.
PLIB_USART_ExistsLineControlMode Identifies whether the LineControlMode feature exists
on the USART module.
PLIB_USART_ExistsLoopback Identifies whether the Loopback feature exists on the
USART module.
PLIB_USART_ExistsOperationMode Identifies whether the OperationMode feature exists on
the USART module.
PLIB_USART_ExistsReceiver Identifies whether the Receiver feature exists on the
USART module.
PLIB_USART_ExistsReceiverAddressAutoDetect Identifies whether the ReceiverAddressAutoDetect
feature exists on the USART module.
PLIB_USART_ExistsReceiverAddressDetect Identifies whether the ReceiverAddressDetect feature
exists on the USART module.
PLIB_USART_ExistsReceiverDataAvailableStatus Identifies whether the ReceiverDataAvailable feature
exists on the USART module
PLIB_USART_ExistsReceiverEnable Identifies whether the ReceiverEnableControl feature
exists on the USART module.
PLIB_USART_ExistsReceiverFramingErrorStatus Identifies whether the ReceiverFramingError feature
exists on the USART module.
PLIB_USART_ExistsReceiverIdleStateLowEnable Identifies whether the ReceiverPolarityInvert feature
exists on the USART module.
PLIB_USART_ExistsReceiverIdleStatus Identifies whether the ReceiverIdle feature exists on
the USART module.
PLIB_USART_ExistsReceiverInterruptMode Identifies whether the ReceiverInterruptMode feature
exists on the USART module.
PLIB_USART_ExistsReceiverMode Identifies whether the ReceiverMode feature exists on
the USART module.
PLIB_USART_ExistsReceiverOverrunStatus Identifies whether the ReceiverOverrunError feature
exists on the USART module.
PLIB_USART_ExistsReceiverParityErrorStatus Identifies whether the ReceiverParityError feature
exists on the USART module.
PLIB_USART_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the
USART module.
PLIB_USART_ExistsSyncClockPolarity Identifies whether the SyncClockPolarity feature exists
on the USART module.
PLIB_USART_ExistsSyncClockSource Identifies whether the SyncClockSource feature exists
on the USART module.
PLIB_USART_ExistsSyncMode Identifies whether the SyncMode feature exists on the
USART module.
PLIB_USART_ExistsTransmitter Identifies whether the Transmitter feature exists on the
USART module.
PLIB_USART_ExistsTransmitter9BitsSend Identifies whether the Transmitter9Bits feature exists
on the USART module.
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PLIB_USART_ExistsTransmitterBreak Identifies whether the TransmitterBreak feature exists
on the USART module.
PLIB_USART_ExistsTransmitterBufferFullStatus Identifies whether the TransmitterBufferFull feature
exists on the USART module.
PLIB_USART_ExistsTransmitterEmptyStatus Identifies whether the TransmitterEmpty feature exists
on the USART module.
PLIB_USART_ExistsTransmitterEnable Identifies whether the TransmitterEnableControl
feature exists on the USART module
PLIB_USART_ExistsTransmitterIdleIsLow Identifies whether the TransmitterIdleIsLow feature
exists on the USART module.
PLIB_USART_ExistsTransmitterIdleStatus Identifies whether the TransmitterIdle feature exists on
the USART module.
PLIB_USART_ExistsTransmitterInterruptMode Identifies whether the TransmitterInterruptMode feature
exists on the USART module.
PLIB_USART_ExistsWakeOnStart Identifies whether the WakeOnStart feature exists on
the USART module.
PLIB_USART_HandshakeModeSelect Sets the data flow configuration.
PLIB_USART_IrDADisable Disables the IrDA encoder and decoder.
PLIB_USART_IrDAEnable Enables the IrDA encoder and decoder.
PLIB_USART_LineControlModeSelect Sets the data flow configuration.
PLIB_USART_LoopbackDisable Disables Loopback mode.
PLIB_USART_LoopbackEnable Enables Loopback mode.
PLIB_USART_OperationModeSelect Configures the operation mode of the USART module.
PLIB_USART_ReceiverAddressAutoDetectDisable Disables the automatic Address Detect mode.
PLIB_USART_ReceiverAddressAutoDetectEnable Setup the automatic Address Detect mode.
PLIB_USART_ReceiverAddressDetectDisable Enables the Address Detect mode.
PLIB_USART_ReceiverAddressDetectEnable Enables the Address Detect mode.
PLIB_USART_ReceiverAddressIsReceived Checks and return if the data received is an address.
PLIB_USART_ReceiverByteReceive Data to be received in the Byte mode.
PLIB_USART_ReceiverDataIsAvailable Identifies if the receive data is available for the
specified USART module.
PLIB_USART_ReceiverDisable Disables the USART receiver.
PLIB_USART_ReceiverEnable Enables the USART receiver.
PLIB_USART_ReceiverFramingErrorHasOccurred Gets the framing error status.
PLIB_USART_ReceiverIdleStateLowDisable Disables receive polarity inversion.
PLIB_USART_ReceiverIdleStateLowEnable Enables receive polarity inversion.
PLIB_USART_ReceiverInterruptModeSelect Sets the USART receiver FIFO level.
PLIB_USART_ReceiverIsIdle Identifies if the receiver is idle.
PLIB_USART_ReceiverModeSelect Disables Single Receive mode.
PLIB_USART_ReceiverOverrunErrorClear Clears a USART Overrun error.
PLIB_USART_ReceiverOverrunHasOccurred Identifies if there was a receiver overrun error.
PLIB_USART_ReceiverParityErrorHasOccurred Gets the parity error status.
PLIB_USART_StopInIdleDisable Disables the Stop in Idle mode (the USART module
continues operation when the device is in Idle mode).
PLIB_USART_StopInIdleEnable Discontinues operation when the device enters Idle
mode.
PLIB_USART_SyncClockPolarityIdleHighDisable Sets the idle state of the clock to low.
PLIB_USART_SyncClockPolarityIdleHighEnable Sets the idle state of the clock to high.
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PLIB_USART_SyncClockSourceSelect Sets the clock source.
PLIB_USART_SyncModeSelect Selects the USART mode to be asynchronous.
PLIB_USART_Transmitter9BitsSend Data to be transmitted in the byte mode with the 9th bit.
PLIB_USART_TransmitterBreakSend Transmits the break character.
PLIB_USART_TransmitterBreakSendIsComplete Returns the status of the break transmission
PLIB_USART_TransmitterBufferIsFull Gets the transmit buffer full status.
PLIB_USART_TransmitterByteSend Data to be transmitted in the Byte mode.
PLIB_USART_TransmitterDisable Disables the specific USART module transmitter.
PLIB_USART_TransmitterEnable Enables the specific USART module transmitter.
PLIB_USART_TransmitterIdleIsLowDisable Disables the Transmit Idle Low state.
PLIB_USART_TransmitterIdleIsLowEnable Enables the Transmit Idle Low state.
PLIB_USART_TransmitterInterruptModeSelect Set the USART transmitter interrupt mode.
PLIB_USART_TransmitterIsEmpty Gets the transmit shift register empty status.
PLIB_USART_TransmitterIsIdle Gets the transmit buffer full status.
PLIB_USART_WakeOnStartDisable Disables the wake-up on start bit detection feature
during Sleep mode.
PLIB_USART_WakeOnStartEnable Enables the wake-up on start bit detection feature
during Sleep mode.
PLIB_USART_WakeOnStartIsEnabled Gets the state of the sync break event completion.
File Name
plib_usart.h
Company
Microchip Technology Inc.
5.6.26 USB Peripheral Library
5.6.26.1 Introduction
This library provides a low-level abstraction of the USB module on Microchip family of microcontrollers with a convenient C
language interface. It can be used to simplify low-level access to the module without the necessity of interacting directly with the
module's registers, thus hiding differences from one microcontroller variant to another.
Description
USB Peripheral Library for Microchip Microcontrollers
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USB Overview
USB is an asynchronous serial interface with a tiered star configuration. USB is implemented as a master/slave configuration. On
a given bus, there can be multiple (up to 127) slaves (devices), but there is only one master (host). There are three possible
module implementations: host, device and OTG dual role. The user should have an understanding of the USB documents
available on the USB implementers web site (www.usb.org).
Device
The USB device accepts data from the host and responds to requests for data. It performs some peripheral functions, such as a
mouse or data storage device.
• Functionality may be class or vendor-specific
• Draws 100 mA or less before configuration
• Can draw up to 500 mA after successful negotiation with the host
• Can support low-speed, full-speed or hi-speed protocol. Hi-speed support requires implementation of full-speed. (Low, Full,
and Hi-Speed supported by this module.)
• Supports control transfers. Supports data transfers required for implementation
• Optionally supports Session Request Protocol (SRP)
• Can be bus-powered or self-powered
Host
The host is the master in a USB system and is responsible for identifying all devices connected to it (enumeration), initiating all
transfers, allocating bus bandwidth and supplying power to any bus-powered USB devices connected directly to it. There are two
types of hosts.
USB Standard Host:
• A large variety of devices are supported
• This host supports all USB transfer types
• USB hubs are supported to allow connection of multiple devices simultaneously
• Device drivers can be updated to support new devices
• A type ‘A’ receptacle is used for each port
• Each port must be able to deliver a minimum of 100 mA for a configured or unconfigured
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• device, and optionally, up to 500 mA for a configured device
• Full-Speed and Low-Speed must be supported. Hi-Speed can be supported.
• This is a typical personal computer implementation
Embedded Host
• Only supports a specific list of devices, referred to as a Targeted Peripheral List (TPL)
• This type of host is only required to support transfer types required by devices in the TPL
• USB hub support is optional (Provided in this module)
• Device drivers are not required to be pocketable
• A type ‘A’ receptacle is used for each port
• Only speeds required by devices in the TLP must be supported. (Low, Full, and Hi-Speed supported by this module.)
• Each port must be able to deliver a minimum of 100 mA for a configured or unconfigured device, and optionally, up to 500 mA
for a configured device
• This is a typical implementation for a microcontroller
USB On-the-Go (OTG)
The OTG dual role device supports both USB host and device functionality. OTG dual role devices use a micro-AB receptacle.
This allows a micro-A or a micro-B plug to be attached. Both the micro-A and micro-B plugs have an additional pin, the ID pin, to
signify the connect type. The plug type, micro-A or micro-B, determines the default role of the OTG device, host or USB device.
An OTG device will perform the role of a host when a micro-A plug is detected. When a micro-B plug is detected, the role of a
USB device is performed.
When an OTG device is directly connected to another OTG device using an OTG cable, micro-A to micro-B, Host Negotiation
Protocol (HNP) can be used to swap the roles of the host and USB device between the two without disconnecting and
reconnecting cabling. To differentiate between the two OTG devices, the term, “A-device”, is used to refer to the device
connected to the micro-A plug and “B-device” is used to refer to the OTG device connected to the micro-B plug.
OTG dual role operating as a host (A-device):
• Only supports a specific list of devices, referred to as a Targeted Peripheral List (TPL). Generic class support is not allowed.
• Only required to support transaction types required by devices in the TPL
• USB hub support is optional. (Multi-point support provided by this module.)
• Device drivers are not required to be pocketable
• Only a single micro-AB receptacle is used
• Only full speed must be supported. Hi-Speed and/or Low-Speed can be supported. (Low, Full, and Hi-Speed supported by
this module.)
• The USB port must be able to deliver a minimum of 8 mA for a configured or unconfigured device, and optionally, up to 500
mA for a configured device
• Supports Host Negotiation Protocol (HNP) and Session Request Protocol (SRP). The host can switch roles to become a
device. The initial role as a host or device is determined by the plug type, micro-A or micro-B, inserted into the micro-AB
receptacle
• The A-device supplies VBUS power, when the bus is powered, even if the roles are swapped using HNP
OTG dual role operating as a USB device (B-device):
• Class or vendor-specific functionality
• Draws 8 mA or less before configuration
• Is typically self-powered due to low-current requirements, but can draw up to 500 mA after successful negotiation with the host
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• Only a single micro-AB receptacle is used
• Must support Full-Speed. Support of low speed and/or Hi-Speed is optional
• Supports control transactions. Supports data transactions required for implementation.
• Supports Session Request Protocol (SRP) and/or Host Negotiation Protocol (HNP). (This module supports both SRP and
HNP.)
• The A-device supplies VBUS power, when the bus is powered, even if the roles are swapped using HNP
Additional Features of the Hi-Speed USB Module
• Operates either as a function controller of a Hi-Speed/Full-Speed USB device or as the host/device in a point-to-point or
multi-point communications with other USB function
• Supports OTG communications with on or more Hi-Speed, Full-Speed, or Low-Speed devices
• Provides soft connect/disconnect.
• In addition to Endpoint Zero, supports seven transmit and seven receive endpoints
• Dynamic FIFO sizing for Endpoints 1-7. (Endpoint Zero FIFO fixed at 64 bytes.) FIFOs use module-internal SRAM.
• Module-internal eight channel DMA with access to all FIFOs
• All host transaction scheduling supported in hardware
• Supports Link Power Management
5.6.26.2 Release Notes
MPLAB Harmony Version: v0.70b USB PLIB Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.26.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.6.26.4 Using the Library
This topic describes the basic architecture of the USB Peripheral Library and provides information and examples on how to use it.
Interface Header File: peripheral.h
The interface to the USB Peripheral Library is defined in the "plib_usb.h" header file, which is included by the "peripheral.h"
peripheral library header file. Any C language source (.c) file that uses the USB Peripheral Library must include "peripheral.h".
Library File:
The USB Peripheral Library is part of the processor-specific peripheral library archive (.a) file installed with the compiler.
Libraries in this archive are automatically available to the linker (in the default search path) for any project built using the
Microchip compiler.
5.6.26.4.1 Hardware Abstraction Models
This section describes the hardware abstraction model for the USB Peripheral Library.
Description
Hardware Abstraction Model
Figure 1. shows the USB Module for the PIC32 family of devices.
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Figure 1: PIC32 USB Module
The USB OTG module contains analog and digital components to provide a USB 2.0 full-speed and low-speed embedded host,
full-speed device, or On-The-Go (OTG) implementation with a minimum of external components. This module in Host mode is
intended for use as an embedded host and therefore does not implement a Universal Host Controller Interface (UHCI) or a Open
Host Controller Interface (OHCI).
The USB OTG module consists of the clock generator, the USB voltage comparators, the transceiver, the Serial Interface Engine
(SIE), a dedicated USB Bus Master, pull-up and pull-down resistors and the register interface.
The clock generator provides the 48 MHz clock, which is required for USB full-speed and low-speed communication. The voltage
comparators monitor the voltage on the VBUS pin to determine the state of the bus. The transceiver provides the analog
translation between the USB bus and the digital logic. The SIE is a state machine that transfers data to and from the endpoint
buffers, and generates the hardware protocol for data transfers. The USB Bus Master transfers data between the data buffers in
RAM and the SIE. The integrated pull-up and pull-down resistors eliminate the need for external signaling components. The
register interface allows the CPU to configure and communicate with the module.
Figure 2 shows the USB module found in PIC24/dsPIC33 devices.
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Figure 2: PIC24/dsPIC33 USB Module
The two implementations are nearly identical, but the PIC24/dsPIC33 USB module also supports using an external USB
transceiver.
Figure 3 provides an example of a USB module on an 8-bit device.
Figure 3: PIC18 USB Module
5.6.26.4.2 Library Overview
This library provides the low level abstraction of the USB Peripheral on Microchip family of microcontrollers with a convenient C
language interface. This topic describes how that abstraction is modeled in the software and introduces the library interface.
Description
Figure 4 describes the abstraction model employed by the USB Peripheral Library.
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Figure 4: USB Peripheral Library Abstraction Model
The peripheral functions are grouped together under different function groups. These application must then use a combination of
function from the different function groups to achieve the desired USB peripheral operation.
Library Interface Section Description
USB Setup Functions This section provides functions to perform general USB peripheral setup
such as functions to set USB Speed, control on-chip pull ups, etc.
Buffer Descriptor Table Functions This section provides functions that allow the application to setup, configure
and access/modify the Buffer Descriptors in the Buffer Descriptor Table.
USB Activity Functions This section provides function that allow the application to monitor bus
conditions on the USB.
USB Bus Signaling Functions This section provides functions that allow the application to generate Reset
and Resume Signaling.
Last Transaction Status Functions This section provides functions that allow the application to query
conditions of the USB peripheral.
Endpoints Functions This section provides functions that allow the application to manage
endpoints.
Interrupts Functions This section provides functions that allow the application to enable, disable
and query the status interrupts in the USB peripheral.
Host Functions This section provides functions that are required to operate the USB
module while in Host mode.
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On-The-Go (OTG) Functions This section provides functions that are required to operate the USB
module while in OTG mode.
External Transceiver Support Functions This section provides function that are required to operate to enable/disable
the external transceiver interface.
VBus Support Functions This section provides functions that allow VBUS level monitoring and VBUS
boost PWM module control.
Test Support Functions This section provides functions that enable/disable test signals needed for
eye pattern measurement.
5.6.26.4.3 USB Buffers and the Buffer Descriptor Table (BDT)
This section describes USB buffers and the Buffer Descriptor Table.
Description
All USB endpoints are implemented using buffers and control bits in RAM. Both software and the USB module have access to
these buffers and control bits. To arbitrate this access a semaphore flag system is used.
Each endpoint can be configured for transmit only, receive only or transmit and receive. Transmit and receive functions have
separate buffers. For each buffer there is a Buffer Descriptor (BD) in the Buffer Descriptor Table (BDT). On most devices the
BDT has room for two transmit and two receive buffers for each endpoint, supporting ping-pong buffering. Buffer descriptors
must be aligned on 512 byte boundaries to enable the USB module to correctly read each entry.
The starting address of the Buffer Descriptor Table is set by the PLIB_USB_BDTBaseAddressSet.
#define USB_MAX_EP_NUMBER 15
#define USB_PING_PONG_MODE_SELECTION USB_PING_PONG__FULL_PING_PONG
#if (USB_PING_PONG_MODE_SELECTION == USB_PING_PONG__NO_PING_PONG)
#define BDT_NUM_ENTRIES ((USB_MAX_EP_NUMBER + 1) * 2)
#elif (USB_PING_PONG_MODE_SELECTION == USB_PING_PONG__EP0_OUT_ONLY)
#define BDT_NUM_ENTRIES (((USB_MAX_EP_NUMBER + 1) * 2)+1)
#elif (USB_PING_PONG_MODE_SELECTION == USB_PING_PONG__FULL_PING_PONG)
#define BDT_NUM_ENTRIES ((USB_MAX_EP_NUMBER + 1) * 4)
#elif (USB_PING_PONG_MODE_SELECTION == USB_PING_PONG__ALL_BUT_EP0)
#define BDT_NUM_ENTRIES (((USB_MAX_EP_NUMBER + 1) * 4)-2)
#else
#error "No ping pong mode defined."
#endif
#if defined(__18CXX)
#pragma udata gBDT=USB_BDT_ADDRESS
#elif defined(__PIC32MX__)
volatile union USB_BDT_ENTRY_TAG gBDT[BDT_NUM_ENTRIES] __attribute__ (( aligned (512) ));
#else
volatile union USB_BDT_ENTRY_TAG gBDT[BDT_NUM_ENTRIES];
#endif//defined(__18CXX))
(For PIC18 devices, this isn't necessary since the BDT always starts at 0x0400 in memory.)
Each Buffer Descriptor entry in the BDT has a bufferAddress pointer to the Buffer Descriptor's buffer in memory (RAM or
FLASH).
Figure 5 shows the structure for most PIC24 and all PIC32 devices. These devices support ping-pong buffering for all endpoints.
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Figure 5: Buffer Descriptor Table and Endpoint Buffers
With 16 endpoints (Endpoints 0 - 15 ) there are 64 possible entries in the Buffer Descriptor Table:
// (Even,Odd) or (Ping,Pong)
// (Rx,Tx) |
// (EP0 to EPn) | |
volatile USB_BDT_ENTRY myBDT[(USB_MAX_EP_NUMBER + 1)][2][2] __attribute__ (( aligned (512)
));
On PIC18F and PIC24F devices, ping-pong buffering can be disabled for all of some of the endpoints. Figure 6 shows the
buffering options available for PIC24F devices and Figure 7 shows the buffering options available for PIC18F devices.
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Figure 6: Buffer Descriptor Table Mapping for Various PIC24F Ping-Pong Configurations
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Figure 7: Buffer Descriptor Table Mapping for Various PIC18F Ping-Pong Configurations
Peripheral library functions are provided to support reading each BD while hiding the details of BDT addressing that can change
when ping-pong buffering is disabled for one or more endpoints. The format of Buffer Descriptors vary from family to family and it
is not important to know the differences, since peripheral library functions hide these details. To understand the information
stored in each Buffer Descriptor Table entry it is informative to look at the C language description for one family of devices. (All
device families support the same information but with different ways of packing the data into memory.)
For most PIC24/dsPIC33 devices and all PIC32 devices each BD is 8 bytes long and is described by this C code:
typedef union _USB_BDT_ENTRY __attribute__ ((packed))
{
uint64_t dlValue; //Double Long Integer Value
uint32_t lValue[2]; //Long Integer Values
uint16_t sValue[4]; //Short Integer Values
struct __attribute__ ((packed))
{
USB_BD_STATUS bufferStatus; //(RW) Buffer Status
uint16_t byteCount:10; //(RW) Byte Count
uint8_t : 6; //( ) Reserved
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uint32_t bufferAddress; //(RW) Buffer Address in Data Ram or Flash
};
} USB_BDT_ENTRY;
For transmit buffers byteCount is set to the length of the buffer using PLIB_USB_BufferByteCountSet. For receive buffers
PLIB_USB_BufferByteCountSet is used to set the maximum allowable receive data length. PLIB_USB_BufferByteCountGet is
used to determine how many bytes were actually transmitted or received. The memory address of each buffer is found in
bufferAddress. The functions PLIB_USB_BufferAddressSet and PLIB_USB_BufferAddressGet support this field in the Buffer
Descriptor.
Buffer status is stored in the 16 least significant bits of each BDT entry:
typedef union _USB_BD_STATUS __attribute__ ((packed))
{
uint16_t sValue; //Short Integer Value
struct __attribute__ ((packed))
{
uint8_t :2; //( )Reserved
uint8_t stallEnable :1; //( W) Buffer Stall Enable
uint8_t dataToggleSyncEnable :1; //( W) Data Toggle Synch Enable
uint8_t :1; //( ) Reserved
uint8_t :1; //( ) Reserved
uint8_t dataToggle :1; //(RW) Data Toggle Synch Value
uint8_t uSBOwnsBuffer :1; //(RW) USB Ownership of buffer and BDT entry
};
struct __attribute__ ((packed))
{
uint8_t :2; //( ) Reserved
uint8_t packetID :4; //(R ) Packet Identifier (PID)
};
} USB_BD_STATUS;
The fields stallEnable and dataToggleSyncEnable in the Buffer Descriptor status structure are writable but not readable.
The function PLIB_USB_BufferStallEnable sets the stallEnable bit. (Hardware will clear the bit after receiving a SETUP token
from the host.) The functions PLIB_USB_BufferDataToggleSyncEnable and PLIB_USB_BufferDataToggleSyncDisable
manipulate dataToggleSyncEnable .
On a read from the status structure stallEnable and dataToggleSyncEnable and the next two (reserved) bits are replaced
by the Packet Identifier (PID), called packetID in the structure. The function PLIB_USB_BufferPIDGet reads packetID.
The rest of the status structure is writable and readable: dataToggle and uSBOwnsBuffer.
The dataToggle (DATA0 or DATA1) of a receive buffer is determined by using PLIB_USB_BufferDataToggleGet. For transmit
buffers the dataToggle value is set using PLIB_USB_BufferDataToggleSelect .
The field uSBOwnsBuffer is used by both software and the USB module as a semaphore. The function
PLIB_USB_BufferReleaseToUSB releases the buffer to the USB module and the function PLIB_USB_BufferReleasedToSW
returns a boolean true when the buffer is released back to software by the USB module. As long as
PLIB_USB_BufferReleasedToSW returns false, software should not change the Buffer Descriptor Table entry or its associated
buffer.
5.6.26.4.4 USB Setup Example
This section provides example code for setting up the USB module.
Description
Following is an example of how to set up the USB module:
#define USB_MAX_EP_NUMBER 15
#define USB_PING_PONG_MODE_SELECTION USB_PING_PONG__FULL_PING_PONG
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#if (USB_PING_PONG_MODE_SELECTION == USB_PING_PONG__NO_PING_PONG)
#define BDT_NUM_ENTRIES ((USB_MAX_EP_NUMBER + 1) * 2)
#elif (USB_PING_PONG_MODE_SELECTION == USB_PING_PONG__EP0_OUT_ONLY)
#define BDT_NUM_ENTRIES (((USB_MAX_EP_NUMBER + 1) * 2)+1)
#elif (USB_PING_PONG_MODE_SELECTION == USB_PING_PONG__FULL_PING_PONG)
#define BDT_NUM_ENTRIES ((USB_MAX_EP_NUMBER + 1) * 4)
#elif (USB_PING_PONG_MODE_SELECTION == USB_PING_PONG__ALL_BUT_EP0)
#define BDT_NUM_ENTRIES (((USB_MAX_EP_NUMBER + 1) * 4)-2)
#else
#error "No ping pong mode defined."
#endif
#if defined(__18CXX)
#pragma udata gBDT=USB_BDT_ADDRESS
#elif defined(__PIC32MX__)
volatile union USB_BDT_ENTRY_TAG gBDT[BDT_NUM_ENTRIES] __attribute__ (( aligned (512) ));
#else
volatile union USB_BDT_ENTRY_TAG gBDT[BDT_NUM_ENTRIES];
#endif//defined(__18CXX))
unsigned int bufferTransactionCount[BDT_NUM_ENTRIES];
// Turn off USB module
PLIB_USB_Disable( usbID );
// Setup the Hardware
if ( usbModuleSetup.StopInIdle )
{
PLIB_USB_StopInIdleEnable( usbID );
}
else
{
PLIB_USB_StopInIdleDisable( usbID );
}
if ( usbModuleSetup.SuspendInSleep )
{
PLIB_USB_AutoSuspendEnable( usbID );
}
else
{
PLIB_USB_AutoSuspendDisable( usbID );
}
PLIB_USB_OperatingModeSelect( usbID, usbModuleSetup.OpMode );
PLIB_USB_PingPongModeSelect( usbID, usbModuleSetup.ppMode );
// Reset all ping pong buffers to "Even"
PLIB_USB_PingPongFreeze( usbID );
PLIB_USB_PingPongUnfreeze( usbID );
// Interrupt flag cleared on the safer side
IFS1bits.USBIF = 0;
// Enable USB module interrupts
PLIB_USB_InterruptEnable( usbID, DRV_USB_GEN_INT_ENABLES );
// Disable all OTG interrupts
PLIB_USB_OTG_InterruptDisable( usbID, DRV_USB_OTB_INT_ENABLES );
// Enable all Error interrupts
PLIB_USB_ErrorInterruptEnable( usbID, DRV_USB_ERR_INT_ENABLES );
// Enable the interrupt source in case of interrupt mode
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IEC1bits.USBIE = 1;
// Setting the Interrupt Prioriry in case of interrupt mode.
IPC11bits.USBIP = 4;
// Initialize BDT
for ( iEntry = 0; iEntry < BDT_NUM_ENTRIES; iEntry++ )
{
#if (defined(__18CXX) || defined(__PIC24F__))
gBDT[iEntry].lValue = 0ul;
#elif (defined (__dsPIC33E__) || defined (__PIC24E__) || defined(__PIC32MX__))
gBDT[iEntry].lValue[0] = 0ul;
gBDT[iEntry].lValue[1] = 0ul;
#else
#error "Unknown device type"
#endif
bufferTransactionCount[iEntry] = 0;
}//end for ( iEntry = 0; iEntry < BDT_NUM_ENTRIES; iEntry++ )
// Inform USB module of BDT's address in memory
#if defined(__PIC32MX__)
// For PIC32
PLIB_USB_BDTBaseAddressSet( usbID , (void *)((uint32_t)KVA_TO_PA(gBDT)) );
#else
// Everybody else
PLIB_USB_BDTBaseAddressSet(MY_USB_INSTANCE, (void *)(&gBDT) );
#endif
/***********************/
/* SETUP ENDPOINT ZERO */
/***********************/
PLIB_USB_BufferAddressSet( usbID, (void*)gBDT, PLIB_USB_PingPongModeGet( usbID ),
0, USB_BUFFER_RX, USB_BUFFER_EVEN, pSetupRcvBuffer );
// Configure Endpoint Zero control register
PLIB_USB_EP0LSDirectConnectDisable( usbID ); // For Hosts, included for completeness
PLIB_USB_EP0NakRetryEnable( usbID ); // For Hosts, included for completeness
PLIB_USB_EPnControlTransferEnable( usbID, 0 ); // Enable control transfers
PLIB_USB_EPnRxSelect( usbID, 0, USB_EP_RX ); // Enable receive
PLIB_USB_EPnHandshakeEnable( usbID, 0 ); // Enable handshaking
// Setup Endpoint Zero's receive buffer BDT entries
ppMode = PLIB_USB_PingPongModeGet( usbID ); // Ping Pong Mode needed for BDT entry indexing
// Clear PID bits
PLIB_USB_BufferPIDBitsClear(usbID,(void*)gBDT,ppMode,0,USB_BUFFER_RX,USB_BUFFER_EVEN);
//Rx0
// Disable buffer stall
PLIB_USB_BufferStallDisable(usbID,(void*)gBDT,ppMode,0,USB_BUFFER_RX,USB_BUFFER_EVEN);
//Rx0
// Enable Data Toggle Synchronization
PLIB_USB_BufferDataToggleSyncEnable(usbID,(void*)gBDT,ppMode,0,USB_BUFFER_RX,USB_BUFFER_EVE
N);
//Rx0
// Set Data0/1 to Data0
PLIB_USB_BufferDataToggleSelect(usbID,(void*)gBDT,ppMode,0,USB_BUFFER_RX,USB_BUFFER_EVEN,US
B_BUFFER_DATA0);
//Rx0
// Setup packets have 8 bytes of data payload
PLIB_USB_BufferByteCountSet(usbID,(void*)gBDT,ppMode,0,USB_BUFFER_RX,USB_BUFFER_EVEN,8);
// Release buffers to USB module
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PLIB_USB_BufferReleaseToUSB(usbID,(void*)gBDT,ppMode,0,USB_BUFFER_RX,USB_BUFFER_EVEN);
PLIB_USB_Enable( gDrvUSBObj[hDriver].usbID ); // Turn on USB module
5.6.26.5 Configuring the Library
The library is configured for the supported processor when the processor is chosen in the MPLAB IDE.
5.6.26.6 Library Interface
Data Types and Constants
Name Description
USB_BUFFER_DATA01 Provides enumeration data toggle for a buffer.
USB_BUFFER_DIRECTION Provides enumeration transmit/receive direction for a buffer.
USB_BUFFER_PING_PONG Enumerates the ping-pong buffer (Even vs. Odd).
USB_BUFFER_SCHEDULE_DATA01 Provides enumeration data toggle for a buffer.
USB_EP_TXRX Provides enumeration transmit/receive setup for an endpoint.
USB_OPMODES Provides enumeration of operating modes supported by USB.
USB_OTG_INTERRUPTS Provides enumeration of interrupts related to the USB On-The-Go (OTG)
module.
USB_OTG_PULL_UP_PULL_DOWN USB OTG pull-Up and pull-Down resistors for D+ and D- .
USB_PID Legal PID values.
USB_PING_PONG_MODE Supports the four modes of ping-pong buffering for PIC18 and PIC24F
devices.
USB_PING_PONG_STATE Decodes which buffer (Even vs. Odd) was used for the last transaction.
USB_TOKEN_SPEED Provides enumeration of available token speeds.
USB_MAX_EP_NUMBER Maximum number of endpoints supported (not including EP0).
Buffer Descriptor Table Functions
Name Description
PLIB_USB_BDTBaseAddressGet Returns the base address of the Buffer Descriptor Table.
PLIB_USB_BDTBaseAddressSet Sets the base address for the Buffer Descriptor Table for PIC24 and
PIC32 devices.
PLIB_USB_BufferAddressGet Gets the memory address of an endpoint buffer.
PLIB_USB_BufferAddressSet Sets the endpoint buffer address.
PLIB_USB_BufferAllCancelReleaseToUSB Cancels all endpoint buffer releases to the USB module and hands
over the buffer to the CPU.
PLIB_USB_BufferByteCountGet Returns the endpoint buffer byte count.
PLIB_USB_BufferByteCountSet Sets the buffer byte count.
PLIB_USB_BufferCancelReleaseToUSB Cancels release of the endpoint buffer by software, allowing software
to again access the buffer.
PLIB_USB_BufferClearAll Clears (zeros out) entries in the Buffer Descriptor Table.
PLIB_USB_BufferClearAllDTSEnable Clears the endpoint descriptor entry and enables data toggle
synchronization.
PLIB_USB_BufferDataToggleGet Returns data synchronization (DATA0 or DATA1) for the endpoint
buffer.
PLIB_USB_BufferDataToggleSelect Sets the endpoint buffer to DATA0 or DATA1.
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PLIB_USB_BufferDataToggleSyncDisable Disables DATA0/DATA1 synchronization between the device and host.
PLIB_USB_BufferDataToggleSyncEnable Enables DATA0/DATA1 synchronization between the device and host.
PLIB_USB_BufferEP0RxStatusInitialize Initializes the Endpoint 0 RX endpoint buffer descriptors.
PLIB_USB_BufferIndexGet Gets the Buffer Descriptor Table index for a buffer.
PLIB_USB_BufferPIDBitsClear Clears the Buffer Status bits in the Buffer Descriptor Table.
PLIB_USB_BufferPIDGet Returns the token packet ID (PID) from the endpoint buffer status.
PLIB_USB_BufferReleasedToSW Returns the boolean flag value of 'true' when the buffer has been
released by the USB module.
PLIB_USB_BufferReleaseToUSB Releases the endpoint buffer by software, allowing the USB module
access to the buffer.
PLIB_USB_BufferSchedule Hands over a buffer to the USB module along with the buffer address
and byte count.
PLIB_USB_BufferStallDisable Disables STALL handshaking for the associated endpoint buffer.
PLIB_USB_BufferStallEnable Enables STALL handshaking for the associated endpoint buffer.
PLIB_USB_BufferStallGet Returns the buffer stall status for an endpoint/direction/ping-pong.
Endpoints Functions
Name Description
PLIB_USB_EP0HostSetup Sends token to the specified address.
PLIB_USB_EP0LSDirectConnectDisable Disables direct connection to a low-speed device for Endpoint 0.
PLIB_USB_EP0LSDirectConnectEnable Enables direct connection to a low-speed device for Endpoint 0.
PLIB_USB_EP0NakRetryDisable Disables retrying of NAKed transactions.
PLIB_USB_EP0NakRetryEnable Enables retrying NAK'd transactions for Endpoint 0.
PLIB_USB_EPnAttributesClear Clears the set attributes of the specified endpoint.
PLIB_USB_EPnAttributesSet Configures attributes of the endpoint such as direction, handshake
capability and direction.
PLIB_USB_EPnControlTransferDisable Disables endpoint control transfers.
PLIB_USB_EPnControlTransferEnable Enables endpoint control transfers.
PLIB_USB_EPnDirectionDisable Disables the specified endpoint direction.
PLIB_USB_EPnHandshakeDisable Disables endpoint handshaking.
PLIB_USB_EPnHandshakeEnable Enables endpoint handshaking.
PLIB_USB_EPnIsStalled Tests whether the endpoint epValue is stalled.
PLIB_USB_EPnRxDisable Disables an endpoint's abililty to process IN tokens.
PLIB_USB_EPnRxEnable Enables an endpoint to process IN tokens.
PLIB_USB_EPnRxSelect Selects receive capabilities of an endpoint.
PLIB_USB_EPnStallClear Clears an endpoint's stalled flag.
PLIB_USB_EPnTxDisable Disables an endpoint's ability to process OUT tokens.
PLIB_USB_EPnTxEnable Enables an endpoint to process OUT tokens.
PLIB_USB_EPnTxRxSelect Selects transmit and/or receive capabilities of an endpoint.
PLIB_USB_EPnTxSelect Selects transmit capabilities of an endpoint.
Error Interrupts Functions
Name Description
PLIB_USB_ErrorInterruptDisable Disables an error interrupt for the USB module.
PLIB_USB_ErrorInterruptEnable Enables an error interrupt for the USB module.
PLIB_USB_ErrorInterruptFlagAllGet Returns a logically ORed bit map of active error interrupt flags.
PLIB_USB_ErrorInterruptFlagClear Clears an error interrupt flag for the USB module.
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PLIB_USB_ErrorInterruptFlagGet Tests an error interrupt flag for the USB module.
PLIB_USB_ErrorInterruptFlagSet Sets an error interrupt flag for the USB module.
PLIB_USB_ErrorInterruptIsEnabled Returns true if interrupts are enabled.
External Transceiver Support Functions
Name Description
PLIB_USB_I2CInterfaceForExtModuleDisable Specifies external module(s) are controlled via dedicated pins.
PLIB_USB_I2CInterfaceForExtModuleEnable Specifies external module(s) are controlled via the I2C interface.
PLIB_USB_TransceiverDisable Disables the on-chip transceiver
PLIB_USB_TransceiverEnable Enables the on-chip transceiver.
Feature Existence Functions
Name Description
PLIB_USB_ExistsActivityPending Identifies whether the ActivityPending feature exists on the USB module.
PLIB_USB_ExistsALL_Interrupt Identifies whether the ALL_Interrupt feature exists on the USB module.
PLIB_USB_ExistsAutomaticSuspend Identifies whether the AutomaticSuspend feature exists on the USB
module.
PLIB_USB_ExistsBDTBaseAddress Identifies whether the BDTBaseAddress feature exists on the USB
module.
PLIB_USB_ExistsBDTFunctions Identifies whether the BDTFunctions feature exists on the USB module.
PLIB_USB_ExistsBufferFreeze Identifies whether the BufferFreeze feature exists on the USB module.
PLIB_USB_ExistsDeviceAddress Identifies whether the DeviceAddress feature exists on the USB module.
PLIB_USB_ExistsEP0LowSpeedConnect Identifies whether the EP0LowSpeedConnect feature exists on the USB
module.
PLIB_USB_ExistsEP0NAKRetry Identifies whether the EP0NAKRetry feature exists on the USB module.
PLIB_USB_ExistsEPnRxEnable Identifies whether the EPnRxEnableEnhanced feature exists on the
USB module.
PLIB_USB_ExistsEPnTxRx Identifies whether the EPnTxRx feature exists on the USB module.
PLIB_USB_ExistsERR_Interrupt Identifies whether the ERR_Interrupt feature exists on the USB module.
PLIB_USB_ExistsERR_InterruptStatus Identifies whether the ERR_InterruptStatus feature exists on the USB
module.
PLIB_USB_ExistsEyePattern Identifies whether the EyePattern feature exists on the USB module.
PLIB_USB_ExistsFrameNumber Identifies whether the FrameNumber feature exists on the USB module.
PLIB_USB_ExistsGEN_Interrupt Identifies whether the GEN_Interrupt feature exists on the USB module.
PLIB_USB_ExistsGEN_InterruptStatus Identifies whether the GEN_InterruptStatus feature exists on the USB
module.
PLIB_USB_ExistsHostBusyWithToken Identifies whether the HostBusyWithToken feature exists on the USB
module.
PLIB_USB_ExistsHostGeneratesReset Identifies whether the HostGeneratesReset feature exists on the USB
module.
PLIB_USB_ExistsLastDirection Identifies whether the LastDirection feature exists on the USB module.
PLIB_USB_ExistsLastEndpoint Identifies whether the LastEndpoint feature exists on the USB module.
PLIB_USB_ExistsLastPingPong Identifies whether the LastPingPong feature exists on the USB module.
PLIB_USB_ExistsLastTransactionDetails Identifies whether the LastTransactionDetails feature exists on the USB
module.
PLIB_USB_ExistsLiveJState Identifies whether the LiveJState feature exists on the USB module.
PLIB_USB_ExistsLiveSingleEndedZero Identifies whether the LiveSingleEndedZero feature exists on the USB
module.
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PLIB_USB_ExistsModuleBusy Identifies whether the ModuleBusy feature exists on the USB module.
PLIB_USB_ExistsModulePower Identifies whether the ModulePower feature exists on the USB module.
PLIB_USB_ExistsNextTokenSpeed Identifies whether the NextTokenSpeed feature exists on the USB
module.
PLIB_USB_ExistsOnChipPullup Identifies whether the OnChipPullup feature exists on the USB module.
PLIB_USB_ExistsOnChipTransceiver Identifies whether the OnChipTransceiver feature exists on the USB
module.
PLIB_USB_ExistsOpModeSelect Identifies whether the OpModeSelect feature exists on the USB module.
PLIB_USB_ExistsOTG_ASessionValid Identifies whether the OTG_ASessionValid feature exists on the USB
module.
PLIB_USB_ExistsOTG_BSessionEnd Identifies whether the OTG_BSessionEnd feature exists on the USB
module.
PLIB_USB_ExistsOTG_IDPinState Identifies whether the OTG_IDPinState feature exists on the USB
module.
PLIB_USB_ExistsOTG_Interrupt Identifies whether the OTG_Interrupt feature exists on the USB module.
PLIB_USB_ExistsOTG_InterruptStatus Identifies whether the OTG_InterruptStatus feature exists on the USB
module.
PLIB_USB_ExistsOTG_LineState Identifies whether the OTG_LineState feature exists on the USB module.
PLIB_USB_ExistsOTG_PullUpPullDown Identifies whether the OTG_PullUpPullDown feature exists on the USB
module.
PLIB_USB_ExistsOTG_SessionValid Identifies whether the OTG_SessionValid feature exists on the USB
module.
PLIB_USB_ExistsOTG_VbusCharge Identifies whether the OTG_VbusCharge feature exists on the USB
module.
PLIB_USB_ExistsOTG_VbusDischarge Identifies whether the OTG_VbusDischarge feature exists on the USB
module.
PLIB_USB_ExistsOTG_VbusPowerOnOff Identifies whether the OTG_VbusPowerOnOff feature exists on the USB
module.
PLIB_USB_ExistsPacketTransfer Identifies whether the PacketTransfer feature exists on the USB module.
PLIB_USB_ExistsPingPongMode Identifies whether the PingPongMode feature exists on the USB module.
PLIB_USB_ExistsResumeSignaling Identifies whether the ResumeSignaling feature exists on the USB
module.
PLIB_USB_ExistsSleepEntryGuard Identifies whether the SleepEntryGuard feature exists on the USB
module.
PLIB_USB_ExistsSOFThreshold Identifies whether the SOFThreshold feature exists on the USB module.
PLIB_USB_ExistsSpeedControl Identifies whether the SpeedControl feature exists on the USB module.
PLIB_USB_ExistsStartOfFrames Identifies whether the StartOfFrames feature exists on the USB module.
PLIB_USB_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the USB module.
PLIB_USB_ExistsSuspend Identifies whether the Suspend feature exists on the USB module.
PLIB_USB_ExistsTokenEP Identifies whether the TokenEP feature exists on the USB module.
PLIB_USB_ExistsTokenPID Identifies whether the TokenPID feature exists on the USB module.
PLIB_USB_ExistsUOEMonitor Identifies whether the UOEMonitor feature exists on the USB module.
Host Functions
Name Description
PLIB_USB_IsBusyWithToken Indicates whether there is a token being executed by the USB module as Host.
PLIB_USB_SOFDisable Disables the automatic generation of the SOF token.
PLIB_USB_SOFEnable Enables the automatic generation of the SOF token every 1 ms.
PLIB_USB_SOFThresholdGet Returns the Start-of-Frame (SOF) Count bits.
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PLIB_USB_SOFThresholdSet Sets the Start-of-Frame (SOF) threshold value.
PLIB_USB_TokenEPGet Returns the specified Endpoint address.
PLIB_USB_TokenEPSet Sets the Endpoint address for a host transaction.
PLIB_USB_TokenPIDGet Returns the token transaction type.
PLIB_USB_TokenPIDSet Sets the token transaction type to pidValue.
PLIB_USB_TokenSpeedSelect Selects low speed or full speed for subsequent token executions.
Interrupts Functions
Name Description
PLIB_USB_InterruptDisable Disables a general interrupt for the USB module.
PLIB_USB_InterruptEnable Enables a general interrupt for the USB module.
PLIB_USB_InterruptEnableGet Returns the enable/disable status of general USB module interrupts
PLIB_USB_InterruptFlagAllGet Returns a logically ORed bit map of active general USB interrupt flags.
PLIB_USB_InterruptFlagClear Clears a general interrupt flag for the USB module.
PLIB_USB_InterruptFlagGet Tests a general interrupt flag for the USB module.
PLIB_USB_InterruptFlagSet Sets a general interrupt flag for the USB module.
PLIB_USB_InterruptIsEnabled Returns true if interrupts are enabled.
Last Transaction Status Functions
Name Description
PLIB_USB_LastTransactionDetailsGet Returns the details of the last completed transaction.
PLIB_USB_LastTransactionDirectionGet Indicates the direction of the last transaction.
PLIB_USB_LastTransactionEndPtGet Returns the endpoint number of the last USB transfer.
PLIB_USB_LastTransactionPingPongStateGet Indicates whether the last transaction was to an EVEN buffer or an
ODD buffer.
On-The-Go (OTG) Functions
Name Description
PLIB_USB_OTG_BSessionHasEnded Returns the status of the B-Session End Indicator bit.
PLIB_USB_OTG_IDPinStateIsTypeA Returns the ID Pin state.
PLIB_USB_OTG_LineStateIsStable Returns the status of the Line Stable Indicator bit.
PLIB_USB_OTG_PullUpPullDownSetup Enables or disables pull-up and pull-down resistors.
PLIB_USB_OTG_SessionValid Returns the status of the Session Valid Indicator bit.
PLIB_USB_OTG_VBusChargeDisable Disables VBUS line charge.
PLIB_USB_OTG_VBusChargeEnable Enables the VBUS line to be charged through a pull-up resistor.
PLIB_USB_OTG_VBusChargeTo3V Sets the VBUS line to charge to 3.3V.
PLIB_USB_OTG_VBusChargeTo5V Sets the VBUS line to charge to 5V.
PLIB_USB_OTG_VBusDischargeDisable Disables VBUS line discharge.
PLIB_USB_OTG_VBusDischargeEnable Enables VBUS line to be discharged through a resistor.
PLIB_USB_OTG_VBusPowerOff Turns off power on the VBUS Line.
PLIB_USB_OTG_VBusPowerOn Turns on power for the VBUS line.
PLIB_USB_OTG_VBusValid Returns the status of the A-VBUS valid indicator.
OTG Interrupts Functions
Name Description
PLIB_USB_OTG_InterruptDisable Disables a USB On-The-Go (OTG) Interrupt for the USB module.
PLIB_USB_OTG_InterruptEnable Enables a USB On-The-Go (OTG) Interrupt for the USB module.
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PLIB_USB_OTG_InterruptFlagClear Clears a USB On-The-Go (OTG) Interrupt flag for the USB module.
PLIB_USB_OTG_InterruptFlagGet Tests a USB On-The-Go (OTG) Interrupt flag for the USB module.
PLIB_USB_OTG_InterruptFlagSet Sets a USB On-The-Go (OTG) Interrupt flag for the USB module.
PLIB_USB_OTG_InterruptIsEnabled Returns whether or not interrupts are enabled.
Other Functions
Name Description
PLIB_USB_ModuleIsBusy Indicates if the USB module is not ready to be enabled.
PLIB_USB_PingPongFreeze Resets all Ping-Pong buffer pointers to even buffers.
PLIB_USB_PingPongReset Resets the USB peripheral internal Ping-Pong indicator to point to even buffers.
PLIB_USB_PingPongUnfreeze Enables Ping-Pong buffering.
PLIB_USB_TokenSend Sends token to the specified address.
Test Support Functions
Name Description
PLIB_USB_EyePatternDisable Disables the USB eye pattern test.
PLIB_USB_EyePatternEnable Enables USB eye pattern test.
USB Activity Functions
Name Description
PLIB_USB_ActivityPending Returns whether or not USB activity is pending.
PLIB_USB_FrameNumberGet Returns the USB frame number.
PLIB_USB_JStateIsActive Live differential receiver J State flag.
PLIB_USB_PacketTransferDisable Disables the Serial Interface Engine (SIE).
PLIB_USB_PacketTransferEnable Re-enables the Serial Interface Engine (SIE), allowing token and packet
processing.
PLIB_USB_PacketTransferIsDisabled Indicates that a setup token has been received from the Host and that
token/packet processing is disabled.
PLIB_USB_SE0InProgress Returns whether a single-ended zero event is in progress.
USB Bus Signaling Functions
Name Description
PLIB_USB_ResetSignalDisable Disables reset signalling on the USB bus.
PLIB_USB_ResetSignalEnable Enables reset signalling on the USB bus.
PLIB_USB_ResumeSignalingDisable Disables resume signaling.
PLIB_USB_ResumeSignalingEnable Enables resume signaling.
USB Setup Functions
Name Description
PLIB_USB_AllInterruptEnable Configures the USB peripheral general interrupts, error interrupts and OTG
interrupts.
PLIB_USB_AutoSuspendDisable Disables USB OTG Auto-suspend mode.
PLIB_USB_AutoSuspendEnable Enables USB Auto-suspend mode.
PLIB_USB_DeviceAddressGet Returns the address of the USB module in Device mode.
PLIB_USB_DeviceAddressSet Sets the USB Device's address.
PLIB_USB_Disable Disables (powers down) the USB module.
PLIB_USB_Enable Enables (powers up) the USB module.
PLIB_USB_FullSpeedDisable Forces the USB module to operate at low speed.
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PLIB_USB_FullSpeedEnable Enables the USB to operate at full speed.
PLIB_USB_OnChipPullUpDisable Disables on-chip pull-ups.
PLIB_USB_OnChipPullUpEnable Enables on-chip pull-ups.
PLIB_USB_OperatingModeSelect Selects the operating mode of the USB module.
PLIB_USB_PingPongModeGet Returns the Ping-Pong Configuration setting.
PLIB_USB_PingPongModeSelect Selects the Ping-Pong Configuration setting.
PLIB_USB_SleepGuardDisable This function disables Sleep Guard. Entry into Sleep mode is immediate.
PLIB_USB_SleepGuardEnable Entry into Sleep mode is blocked if bus activity is detected or if an interrupt is
pending.
PLIB_USB_StopInIdleDisable Allows the USB module to continue operation when the device enters Idle mode.
PLIB_USB_StopInIdleEnable Enables USB module operation to stop when the device enters Idle mode.
PLIB_USB_SuspendDisable Disables USB OTG Suspend mode.
PLIB_USB_SuspendEnable Enables USB Suspend mode.
PLIB_USB_UOEMonitorDisable Disables the OE signal output.
PLIB_USB_UOEMonitorEnable Enables the OE signal output.
VBus Support Functions
Name Description
PLIB_USB_ExternalComparatorMode2Pin Sets the 2-pin input configuration for VBUS comparators.
PLIB_USB_ExternalComparatorMode3Pin Sets the 3-pin input configuration for VBUS Comparators.
PLIB_USB_PWMCounterDisable Disables the PWM counter used to generate the VBUS for the USB
module.
PLIB_USB_PWMCounterEnable Enables the PWM counter used to generate the VBUS for the USB
module.
PLIB_USB_PWMDisable Disables the PWM Generator.
PLIB_USB_PWMEnable Enables the PWM Generator.
PLIB_USB_PWMPolaritiyActiveLow Sets the PWM output to active-high and resets low.
PLIB_USB_PWMPolarityActiveHigh Sets the PWM output to active-low and resets high.
PLIB_USB_VBoostDisable Disables the On-Chip 5V Boost Regulator Circuit Disabled bit.
PLIB_USB_VBoostEnable Enables the On-Chip 5V Boost Regulator Circuit Enabled bit.
PLIB_USB_VBUSComparatorDisable Disables the on-chip VBUS Comparator.
PLIB_USB_VBUSComparatorEnable Enables the on-chip VBUS Comparator.
PLIB_USB_VBUSPullUpDisable Disables the pull-up on the VBUS pin.
PLIB_USB_VBUSPullUpEnable Enables the pull-up on the VBUS pin.
Description
This library provides the low level abstraction of the USB Peripheral on Microchip family of microcontrollers with a convenient C
language interface.
5.6.26.6.1 USB Setup Functions
5.6.26.6.1.1 PLIB_USB_AllInterruptEnable Function
C
void PLIB_USB_AllInterruptEnable(
USB_MODULE_ID index,
USB_INTERRUPTS usbInterruptsFlag,
USB_ERROR_INTERRUPTS usbErrorInterruptsFlag,
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USB_OTG_INTERRUPTS otgInterruptFlag
);
Description
This function configures the USB peripheral general interrupts, error interrupts and OTG interrupts.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
usbInterruptsFlag General interrupts to be configured
usbErrorInterruptsFlag USB Error interrupts to be configured
otgInterruptFlag OTG interrupts to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsALL_Interrupt in your application to determine whether this feature is available.
Example
// This code snippet disables all OTG interrupts, disables
// the SOF interrupt and enables all error interrupts.
USB_OTG_INTERRUPTS otgInterruptEnables = ~USB_OTG_INT_ALL ;
USB_INTERRUPTS generalInterruptEnables = USB_INT_ALL & ~USB_INT_SOF ;
USB_ERROR_INTERRUPTS errorInterruptEnables = USB_ERR_INT_ALL ;
PLIB_USB_AllInterruptEnable(USB_MODULE_ID index, USB_INTERRUPTS usbInterruptsFlag,
USB_ERROR_INTERRUPTS usbErrorInterruptsFlag,
USB_OTG_INTERRUPTS otgInterruptFlag);
5.6.26.6.1.2 PLIB_USB_AutoSuspendDisable Function
C
void PLIB_USB_AutoSuspendDisable(
USB_MODULE_ID index
);
Description
This function disables USB OTG Auto-suspend mode. The USB OTG module will operate normally and does not automatically
suspend upon entry to Sleep mode. Software must use PLIB_USB_SuspendEnable to suspend the module, including the USB
48 MHz clock
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
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Remarks
Not available on PIC18 devices.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsAutomaticSuspend in your application to determine whether this feature is available.
Example
PLIB_USB_AutoSuspendDisable(MY_USB_INSTANCE);
5.6.26.6.1.3 PLIB_USB_AutoSuspendEnable Function
C
void PLIB_USB_AutoSuspendEnable(
USB_MODULE_ID index
);
Description
This function enables USB Auto-suspend mode. The USB module automatically suspends upon entry to Sleep mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 devices.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsAutomaticSuspend in your application to determine whether this feature is available.
Example
PLIB_USB_AutoSuspendEnable(MY_USB_INSTANCE);
5.6.26.6.1.4 PLIB_USB_DeviceAddressGet Function
C
uint8_t PLIB_USB_DeviceAddressGet(
USB_MODULE_ID index
);
Description
This function returns the address of the USB module in Device mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
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Returns
Device Address
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsDeviceAddressin your application to determine whether this feature is available.
Example
myUSBAddress = PLIB_USB_DeviceAddressGet(MY_USB_INSTANCE);
5.6.26.6.1.5 PLIB_USB_DeviceAddressSet Function
C
void PLIB_USB_DeviceAddressSet(
USB_MODULE_ID index,
uint8_t address
);
Description
This function sets the USB Device's address as part of enumeration.
Preconditions
USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
address USB address
Returns
None.
Remarks
Not applicable for PIC18 devices, since USB Host functionality is not available on PIC18 devices.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsDeviceAddressin your application to determine whether this feature is available.
Example
uint8_t myUSBAddress = ....;
PLIB_USB_DeviceAddressSet(MY_USB_INSTANCE, myUSBAddress);
5.6.26.6.1.6 PLIB_USB_Disable Function
C
void PLIB_USB_Disable(
USB_MODULE_ID index
);
Description
This function disables (powers down) the USB module.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
For PIC24/dsPIC33 and PIC32 devices, the USB module must be in Device mode before the USB module is powered down.
For PIC32 devices, all reads or writes to module registers after powering down the module will be invalid until
PLIB_USB_ModuleIsBusy (MY_USB_INSTANCE) == false.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsModulePower in your application to determine whether this feature is available.
Example
#if ( defined(__PIC24E__) || defined(__dsPIC33E__) || defined(__PIC32MX__) )
// Disable Host, Device, or OTG before powering down
PLIB_USB_OperatingModeSelect( MY_USB_INSTANCE, USB_OPMODE_NONE );
#endif
// Turn off USB
PLIB_USB_Disable(MY_USB_INSTANCE);
#ifdef (__PIC32MX__)
// For PIC32, wait until module is no longer busy before trying to
// access any USB module registers.
while ( PLIB_USB_ModuleIsBusy (MY_USB_INSTANCE) )
{
//wait
}
#endif
// Can now read or modify USB module status
5.6.26.6.1.7 PLIB_USB_Enable Function
C
void PLIB_USB_Enable(
USB_MODULE_ID index
);
Description
This function enables (powers up) the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not valid on PIC18 devices until a valid clock source is provided to the USB module.
See also PLIB_USB_ModuleIsBusy.
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This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsModulePoweryour application to determine whether this feature is available.
Example
// Complete Needed setup for the module
PLIB_USB_Enable(MY_USB_INSTANCE);
5.6.26.6.1.8 PLIB_USB_FullSpeedDisable Function
C
void PLIB_USB_FullSpeedDisable(
USB_MODULE_ID index
);
Description
This function forces the USB module to operate at low speed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
For PIC18 devices, use only before the USB module is enabled to select low speed. In addition, an input clock of 6 MHz instead
of 48 MHz is required.
For all others devices: Host mode only.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsSpeedControl in your application to determine whether this feature is available.
Example
PLIB_USB_FullSpeedDisable(MY_USB_INSTANCE);
5.6.26.6.1.9 PLIB_USB_FullSpeedEnable Function
C
void PLIB_USB_FullSpeedEnable(
USB_MODULE_ID index
);
Description
This function enables the USB to operate at full speed.
Preconditions
Use only before the USB module is enabled by calling PLIB_USB_Enable.
Parameters
Parameters Description
index Identifier for the device instance of interest
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Returns
None.
Remarks
For PIC18 devices, use only before the USB module is enabled to select low speed. In addition, an input clock of 6 MHz instead
of 48 MHz is required.
For all others devices: Host mode only.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsSpeedControl in your application to determine whether this feature is available.
Example
PLIB_USB_FullSpeedEnable(MY_USB_INSTANCE);
5.6.26.6.1.10 PLIB_USB_OnChipPullUpDisable Function
C
void PLIB_USB_OnChipPullUpDisable(
USB_MODULE_ID index
);
Description
This function disables on-chip pull-ups.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
PIC18 devices only.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsOnChipPullup in your application to determine whether this feature is available.
Example
PLIB_USB_OnChipPullUpDisable(MY_USB_INSTANCE);
5.6.26.6.1.11 PLIB_USB_OnChipPullUpEnable Function
C
void PLIB_USB_OnChipPullUpEnable(
USB_MODULE_ID index
);
Description
This function enables on-chip pull-ups. Pull-up on D+ in Full-Speed mode. Pull-up on D- in Low-Speed mode.
Preconditions
Use only before the USB module is enabled by calling PLIB_USB_Enable.
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Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
PIC18 devices only.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsOnChipPullup in your application to determine whether this feature is available.
Example
PLIB_USB_OnChipPullUpEnable(MY_USB_INSTANCE);
5.6.26.6.1.12 PLIB_USB_OperatingModeSelect Function
C
void PLIB_USB_OperatingModeSelect(
USB_MODULE_ID index,
USB_OPMODES opMode
);
Description
This function selects the operating mode of the USB module, either Host, Device, or OTG.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
opMode Selected operating mode: USB_OPMODE_DEVICE, USB_OPMODE_HOST, or
USB_OPMODE_OTG
Returns
None.
Remarks
Not needed on PIC18 devices, since only UPB_OPMODE_DEVICE is supported and there are no other operating modes. Use
USB_OPMODE_NONE to disable all possible functions.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsOpModeSelect in your application to determine whether this feature is available.
Example
PLIB_USB_OperatingModeSelect( MY_USB_INSTANCE, USB_OPMODE_DEVICE );
5.6.26.6.1.13 PLIB_USB_PingPongModeGet Function
C
USB_PING_PONG_MODE PLIB_USB_PingPongModeGet(
USB_MODULE_ID index
);
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Description
This function returns the Ping-Pong Configuration setting.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
Ping-Pong Mode - One of USB_PING_PONG__ALL_BUT_EP0, USB_PING_PONG__FULL_PING_PONG,
USB_PING_PONG__EP0_OUT_ONLY, USB_PING_PONG__NO_PING_PONG
Remarks
For PIC18F and PIC24F devices only.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsPingPongMode in your application to determine whether this feature is available.
Example
ppConfig = PLIB_USB_PingPongModeGet(MY_USB_INSTANCE);
5.6.26.6.1.14 PLIB_USB_PingPongModeSelect Function
C
void PLIB_USB_PingPongModeSelect(
USB_MODULE_ID index,
USB_PING_PONG_MODE ppConfig
);
Description
This function selects the Ping-Pong Configuration setting.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
ppConfig Ping-Pong configuration selection. One of USB_PING_PONG__ALL_BUT_EP0,
USB_PING_PONG__FULL_PING_PONG,
USB_PING_PONG__EP0_OUT_ONLY, USB_PING_PONG__NO_PING_PONG
Returns
None.
Remarks
For PIC18F and PIC24F devices only. This feature may not be available on all devices. Please refer to the specific device data
sheet to determine availability or use PLIB_USB_ExistsPingPongMode in your application to determine whether this feature is
available.
Example
PLIB_USB_PingPongModeSelect(MY_USB_INSTANCE,USB_PING_PONG__ALL_BUT_EP0);
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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5.6.26.6.1.15 PLIB_USB_SleepGuardDisable Function
C
void PLIB_USB_SleepGuardDisable(
USB_MODULE_ID index
);
Description
This function disables Sleep Guard. Entry into Sleep mode is immediate.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18, dsPIC or PIC24 devices. Not available on all PIC32 devices. Refer to the specific device data sheet for
details.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsSleepEntryGuard in your application to determine whether this feature is available.
Example
PLIB_USB_SleepGuardDisable(MY_USB_INSTANCE);
5.6.26.6.1.16 PLIB_USB_SleepGuardEnable Function
C
void PLIB_USB_SleepGuardEnable(
USB_MODULE_ID index
);
Description
This function block entry into Sleep mode if bus activity is detected or if an interrupt is pending.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18, dsPIC, or PIC24 devices. Not available on all PIC32 devices. Refer to the specific device data sheet for
details. This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or
use PLIB_USB_ExistsSleepEntryGuard in your application to determine whether this feature is available.
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Example
PLIB_USB_SleepGuardEnable(MY_USB_INSTANCE);
5.6.26.6.1.17 PLIB_USB_StopInIdleDisable Function
C
void PLIB_USB_StopInIdleDisable(
USB_MODULE_ID index
);
Description
This function allows the USB module to continue operation when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsStopInIdle in your application to determine whether this feature is available.
Example
PLIB_USB_StopInIdleDisable(MY_USB_INSTANCE);
5.6.26.6.1.18 PLIB_USB_StopInIdleEnable Function
C
void PLIB_USB_StopInIdleEnable(
USB_MODULE_ID index
);
Description
This function enables USB module operation to stop when the device enters Idle mode.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsStopInIdle in your application to determine whether this feature is available.
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Example
PLIB_USB_StopInIdleEnable(MY_USB_INSTANCE);
5.6.26.6.1.19 PLIB_USB_SuspendDisable Function
C
void PLIB_USB_SuspendDisable(
USB_MODULE_ID index
);
Description
This function disables USB OTG Suspend mode. The USB OTG module will operate normally.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 devices.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsSuspend in your application to determine whether this feature is available.
Example
PLIB_USB_SuspendDisable(MY_USB_INSTANCE);
5.6.26.6.1.20 PLIB_USB_SuspendEnable Function
C
void PLIB_USB_SuspendEnable(
USB_MODULE_ID index
);
Description
This function enables USB Suspend mode. The 48 MHz USB clock will be gated off. The transceiver is placed in a low-power
state.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 devices.
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This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsSuspend in your application to determine whether this feature is available.
Example
PLIB_USB_SuspendEnable(MY_USB_INSTANCE);
5.6.26.6.1.21 PLIB_USB_UOEMonitorDisable Function
C
void PLIB_USB_UOEMonitorDisable(
USB_MODULE_ID index
);
Description
This function disables the OE signal output.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsUOEMonitor in your application to determine whether this feature is available.
Example
//Disable the OE output.
PLIB_USB_UOEMonitorDisable(MY_USB_INSTANCE);
5.6.26.6.1.22 PLIB_USB_UOEMonitorEnable Function
C
void PLIB_USB_UOEMonitorEnable(
USB_MODULE_ID index
);
Description
This function enables the OE signal output.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsUOEMonitor in your application to determine whether this feature is available.
Example
//Enable the OE output.
PLIB_USB_UOEMonitorEnable(MY_USB_INSTANCE);
5.6.26.6.2 Buffer Descriptor Table Functions
5.6.26.6.2.1 PLIB_USB_BDTBaseAddressGet Function
C
void* PLIB_USB_BDTBaseAddressGet(
USB_MODULE_ID index
);
Description
This function returns the base address of the Buffer Descriptor Table.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Always set to 0x400 for PIC18 devices. Must be set for dsPIC33E/PIC24E, PIC24F, and PIC32 devices using
PLIB_USB_BDTBaseAddressSet.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTBaseAddress in your application to determine whether this feature is available.
Example
void * pMyBDT;
pMyBDT = PLIB_USB_BDTBaseAddressGet(MY_USB_INSTANCE);
5.6.26.6.2.2 PLIB_USB_BDTBaseAddressSet Function
C
void PLIB_USB_BDTBaseAddressSet(
USB_MODULE_ID index,
void* address
);
Description
This function sets the base address for the Buffer Descriptor Table. This function is only available on PIC24 and PIC32 devices.
Preconditions
None.
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5-3201
Parameters
Parameters Description
index Identifier for the device instance of interest
address Physical memory address in RAM of Buffer Descriptor Table
Returns
None.
Remarks
Available on dsPIC33E/PIC24E, PIC24F, and PIC32. For PIC18 devices the address is fixed at 0x400. The address of the Buffer
Descriptor Table must be 512 byte-aligned. This feature may not be available on all devices. Please refer to the specific device
data sheet to determine availability or use PLIB_USB_ExistsBDTBaseAddress in your application to determine whether this
feature is available.
Example
#if defined(__PIC32MX__)
// For PIC32
PLIB_USB_BDTBaseAddressSet(MY_USB_INSTANCE, (void *)((uint32_t)KVA_TO_PA(&myBDT)) );
#else
// Everybody else
PLIB_USB_BDTBaseAddressSet(MY_USB_INSTANCE, (void *)(&myBDT) );
#endif
5.6.26.6.2.3 PLIB_USB_BufferAddressGet Function
C
void* PLIB_USB_BufferAddressGet(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function gets the memory address of an endpoint buffer.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint Value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
Buffer address in memory.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.4 PLIB_USB_BufferAddressSet Function
C
void PLIB_USB_BufferAddressSet(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong,
void* bufferAddress
);
Description
This function sets the endpoint buffer address.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
bufferAddress address in memory of endpoint transmit or receive buffer
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.5 PLIB_USB_BufferAllCancelReleaseToUSB Function
C
void PLIB_USB_BufferAllCancelReleaseToUSB(
USB_MODULE_ID index,
void * pBDT,
USB_PING_PONG_MODE ppMode,
int nEndpoints
);
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Description
This function cancels all endpoint buffer releases to the USB module and hands over the buffer to the CPU.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
pBDT Pointer to the Buffer Descriptor Table
ppMode Buffer Descriptor Table Ping-Pong mode
nEndpoints Number of endpoints in the Buffer-Descriptor table
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
//Cancel all buffer releases to USB.
//BDT has 3 Endpoints.
PLIB_USB_BufferAllCancelReleaseToUSB(MY_USB_INSTANCE, pBDT,
USB_PING_PONG_NO_PING_PONG, 3);
5.6.26.6.2.6 PLIB_USB_BufferByteCountGet Function
C
uint16_t PLIB_USB_BufferByteCountGet(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function returns the endpoint buffer byte count, the actual number of bytes transmitted or received.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
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Returns
Endpoint buffe byte count.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.7 PLIB_USB_BufferByteCountSet Function
C
void PLIB_USB_BufferByteCountSet(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong,
uint16_t bufferByteCount
);
Description
This function sets the number of bytes to be transmitted or the maximum number of bytes to be received.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
bufferByteCount number of bytes to be transmitted or the maximum number of bytes to be received
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.8 PLIB_USB_BufferCancelReleaseToUSB Function
C
void PLIB_USB_BufferCancelReleaseToUSB(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3205
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function cancels the release of the endpoint buffer by software, allowing software to again access the buffer.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.9 PLIB_USB_BufferClearAll Function
C
void PLIB_USB_BufferClearAll(
USB_MODULE_ID index,
void * pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function clears (zeros out) the entries in the Buffer Descriptor Table.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.10 PLIB_USB_BufferClearAllDTSEnable Function
C
void PLIB_USB_BufferClearAllDTSEnable(
USB_MODULE_ID index,
void * pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection
);
Description
This function clears the endpoint descriptor entry and enables data toggle synchronization.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
pBDT pointer to Buffer Descriptor Table
pingpong Ping-Pong mode.
epvalue Endpoint to be be affected
bufferDirection Endpoint direction
Returns
None.
Remarks
None.
Example
//Clear endpoint 6 buffer descriptor transmit entry and
//enable data toggle synchronization.
PLIB_USB_BufferClearAllDTSEnable ( MY_USB_INSTANCE, pBDT,
USB_PING_PONG_NO_PING_PONG, 6, USB_BUFFER_TX);
5.6.26.6.2.11 PLIB_USB_BufferDataToggleGet Function
C
USB_BUFFER_DATA01 PLIB_USB_BufferDataToggleGet(
USB_MODULE_ID index,
void* pBDT,
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function returns data synchronization (DATA0 or DATA1) for the endpoint buffer.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
Data Toggle value, USB_BUFFER_DATA0 or USB_BUFFER_DATA1, for the buffer
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.12 PLIB_USB_BufferDataToggleSelect Function
C
void PLIB_USB_BufferDataToggleSelect(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong,
USB_BUFFER_DATA01 bufferData01
);
Description
This function sets the endpoint buffer to DATA0 or DATA1.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
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5-3208
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
bufferData01 USB_BUFFER_DATA0 or USB_BUFFER_DATA1
Returns
None.
Remarks
See PLIB_USB_BufferDataToggleGet to determine the received data toggle setting. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use PLIB_USB_ExistsBDTFunctions in your
application to determine whether this feature is available.
Example
5.6.26.6.2.13 PLIB_USB_BufferDataToggleSyncDisable Function
C
void PLIB_USB_BufferDataToggleSyncDisable(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function disables DATA0/DATA1 synchronization between the device and host.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.14 PLIB_USB_BufferDataToggleSyncEnable Function
C
void PLIB_USB_BufferDataToggleSyncEnable(
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3209
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function enables DATA0/DATA1 synchronization between the device and host.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.15 PLIB_USB_BufferEP0RxStatusInitialize Function
C
void PLIB_USB_BufferEP0RxStatusInitialize(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
USB_BUFFER_PING_PONG pingpong,
uint16_t bufferByteCount
);
Description
This function initializes the Endpoint 0 RX endpoint buffer descriptors. This function will clear the Endpoint 0 RX Buffer
Descriptor status field, load the endpoint size and release the buffer to the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
pBDT Pointer to Buffer Descriptor Table
pingpong Ping-Pong mode
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bufferByteCount size of the EP0 RX buffer in bytes
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
//Initialize EP0 RX even buffer descriptor and release back to
//USB. Buffer size is 64
PLIB_USB_BufferEP0RxStatusInitialize ( MY_USB_INSTANCE, pBDT,
USB_PING_PONG_NO_PING_PONG, USB_BUFFER_EVEN, 64);
5.6.26.6.2.16 PLIB_USB_BufferIndexGet Function
C
uint8_t PLIB_USB_BufferIndexGet(
USB_MODULE_ID index,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function gets the Buffer Descriptor Table index for a buffer.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
Buffer index into the Buffer Descriptor Table.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.17 PLIB_USB_BufferPIDBitsClear Function
C
void PLIB_USB_BufferPIDBitsClear(
USB_MODULE_ID index,
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3211
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function clears the Buffer Status bits in the Buffer Descriptor Table.
Preconditions
The associated buffer must have been released by the USB module (i.e., PLIB_USB_BufferReleasedToSW returns 'true'.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
None.
Remarks
Call PLIB_USB_BufferPIDBitsClear before setting buffer control bits. This is equivalent to:
PLIB_USB_BufferCancelReleaseToUSB(...) PLIB_USB_BufferDataToggleSelect( ...,USB_BUFFER_DATA0)
PLIB_USB_BufferDataToggleSyncDisable(...) PLIB_USB_BufferStallDisable(...) This feature may not be available on all devices.
Please refer to the specific device data sheet to determine availability or use PLIB_USB_ExistsBDTFunctions in your application
to determine whether this feature is available.
Example
5.6.26.6.2.18 PLIB_USB_BufferPIDGet Function
C
uint8_t PLIB_USB_BufferPIDGet(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function returns the token packet ID (PID) from the endpoint buffer status.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3212
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
Endpoint buffer packet ID (PID).
Remarks
There is no equivalent "Set" routine, since this field is read-only in the buffer status register within the Buffer Descriptor Table. It
is set when the buffer has been transmitted or received by the USB module and the usbOwnsBuffer field has been cleared by
the USB module, releasing the buffer for software access. This feature may not be available on all devices. Please refer to the
specific device data sheet to determine availability or use PLIB_USB_ExistsBDTFunctions in your application to determine
whether this feature is available.
Example
5.6.26.6.2.19 PLIB_USB_BufferReleasedToSW Function
C
bool PLIB_USB_BufferReleasedToSW(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function returns the boolean flag value of 'true' when the buffer has been released by the USB module.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
• true - The buffer has been released by hardware
• false - The buffer is still controlled by hardware
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3213
Example
5.6.26.6.2.20 PLIB_USB_BufferReleaseToUSB Function
C
void PLIB_USB_BufferReleaseToUSB(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function releases the endpoint buffer by software, allowing the USB module access to buffer.
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.2.21 PLIB_USB_BufferSchedule Function
C
void PLIB_USB_BufferSchedule(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong,
void * bufferAddress,
int16_t bufferByteCount,
USB_BUFFER_SCHEDULE_DATA01 bufferData01
);
Description
This function sets the endpoint descriptor buffer address, sets the send/receive byte count, and then hands over the buffer to the
USB module.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3214
Preconditions
None.
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
bufferAddress Address of the application buffer
bufferByteCount Send or expected receive byte count
bufferData01 USB_BUFFER_SET_DATA0, USB_BUFFER_SET_DATA1, or
USB_BUFFER_DONTCHANGE (The last choice leaves the existing DATA0/1
value of the buffer alone.)
Returns
None.
Remarks
This function does the work of three other functions: PLIB_USB_BufferAddressSet, PLIB_USB_BufferByteCountSet,
PLIB_USB_BufferReleaseToUSB
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
5.6.26.6.2.22 PLIB_USB_BufferStallDisable Function
C
void PLIB_USB_BufferStallDisable(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function disables STALL handshaking for the associated endpoint buffer.
Preconditions
The associated buffer must have been released by the USB module (i.e., PLIB_USB_BufferReleasedToSW returns 'true').
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3215
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
None.
Remarks
Release of a STALL handshake for the buffer is done by hardware when the host sends a SETUP token to the associated
endpoint or resets the USB module This feature may not be available on all devices. Please refer to the specific device data
sheet to determine availability or use PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is
available. .
Example
5.6.26.6.2.23 PLIB_USB_BufferStallEnable Function
C
void PLIB_USB_BufferStallEnable(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function enables STALL handshaking for the associated endpoint buffer.
Preconditions
The associated buffer must have been released by the USB module (i.e. PLIB_USB_BufferReleasedToSW returns 'true').
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
None.
Remarks
Release of a STALL handshake for the buffer is done by hardware when the host sends a SETUP token to the associated
endpoint or resets the USB module. This feature may not be available on all devices. Please refer to the specific device data
sheet to determine availability or use PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is
available.
Example
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3216
5.6.26.6.2.24 PLIB_USB_BufferStallGet Function
C
bool PLIB_USB_BufferStallGet(
USB_MODULE_ID index,
void* pBDT,
USB_PING_PONG_MODE ppMode,
uint8_t epValue,
USB_BUFFER_DIRECTION bufferDirection,
USB_BUFFER_PING_PONG bufferPingPong
);
Description
This function returns the buffer stall status for an endpoint/direction/ping-pong.
Preconditions
the associated buffer must have been released by the USB module (i.e., PLIB_USB_BufferReleasedToSW returns 'true').
Parameters
Parameters Description
index Dummy argument, identifier for the device instance of interest
pBDT Pointer to start of Buffer Descriptor Table
ppMode Ping-Pong buffering mode
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
bufferDirection USB_BUFFER_RX or USB_BUFFER_TX
bufferPingPong USB_BUFFER_EVEN or USB_BUFFER_ODD
Returns
• true - Buffer stall is enabled
• false - Buffer stall is not enabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBDTFunctions in your application to determine whether this feature is available.
Example
5.6.26.6.3 Endpoints Functions
5.6.26.6.3.1 PLIB_USB_EP0HostSetup Function
C
void PLIB_USB_EP0HostSetup(
USB_MODULE_ID index
);
Description
This function configures endpoint 0 for typical host operation. Control transfers are enable. Transmit and Receive is enabled.
Handshaking is enabled. Low Speed connection is disabled. NAK retry is disabled.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3217
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsGEN_Interrupt in your application to determine whether this feature is available.
Example
// Configure endpoint 0 for host operation
PLBIB_USB_EP0HostSetup(USB_MODULE_ID index);
5.6.26.6.3.2 PLIB_USB_EP0LSDirectConnectDisable Function
C
void PLIB_USB_EP0LSDirectConnectDisable(
USB_MODULE_ID index
);
Description
This function disables direct connection to a low-speed device for Endpoint 0.
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Host mode and U1EP0 only. Not applicable for PIC18 devices, since USB Host functionality is not available on PIC18 devices.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEP0LowSpeedConnect in your application to determine whether this feature is available.
Example
PLIB_USB_EP0LSDirectConnectDisable(MY_USB_INSTANCE);
5.6.26.6.3.3 PLIB_USB_EP0LSDirectConnectEnable Function
C
void PLIB_USB_EP0LSDirectConnectEnable(
USB_MODULE_ID index
);
Description
This function enables direct connection to a low-speed device for Endpoint 0.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3218
Preconditions
USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Host Mode and U1EP0 only. Not applicable for PIC18 devices, since USB Host functionality is not available on PIC18 devices.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEP0LowSpeedConnect in your application to determine whether this feature is available.
Example
PLIB_USB_EP0LSDirectConnectEnable(MY_USB_INSTANCE);
5.6.26.6.3.4 PLIB_USB_EP0NakRetryDisable Function
C
void PLIB_USB_EP0NakRetryDisable(
USB_MODULE_ID index
);
Description
This function disables retrying of NAKed transactions.
Preconditions
The USB module must be in Host or OTG modes.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Host/OTG only. Not applicable for PIC18 devices, since USB Host and OTG functionality is not available on PIC18 devices. This
feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEP0NAKRetry in your application to determine whether this feature is available.
Example
PLIB_USB_EP0NakRetryDisable(MY_USB_INSTANCE);
5.6.26.6.3.5 PLIB_USB_EP0NakRetryEnable Function
C
void PLIB_USB_EP0NakRetryEnable(
USB_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3219
Description
This function enables retrying NAK'd transactions for Endpoint 0.
Preconditions
The USB module must be in Host or OTG modes.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Host/OTG only. Not applicable for PIC18 devices, since USB Host or OTG functionality is not available on PIC18 devices. This
feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEP0NAKRetry in your application to determine whether this feature is available.
Example
PLIB_USB_EP0NakRetryEnable(MY_USB_INSTANCE);
5.6.26.6.3.6 PLIB_USB_EPnAttributesClear Function
C
void PLIB_USB_EPnAttributesClear(
USB_MODULE_ID index,
uint8_t epValue
);
Description
Clears the set attributes of the specified endpoint. The endpoint transmit receive, handshake and setup packet handling
capability is disabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
Returns
None.
Remarks
None.
Example
// This clears up the endpoint 0 atrributes and thus disables
// the endpoints
PLIB_USB_EPnAttributesClear(MY_USB_INSTANCE, 0);
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3220
5.6.26.6.3.7 PLIB_USB_EPnAttributesSet Function
C
void PLIB_USB_EPnAttributesSet(
USB_MODULE_ID index,
uint8_t epValue,
int direction,
bool isControl,
bool handshake
);
Description
Configures attributes of the endpoint such as direction, handshake capability and direction. If the isControl flag is true, then the
direction and handshake parameters are ignored and the endpoint is configured for control transfers.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
direction Endpoint direction, if 1 then RX and if 0 then TX.
isControl If true endpoint is configured for control transfers.
handshake If true, then handshake is enabled on the endpoint else it is disabled.
Returns
None.
Remarks
None.
Example
// This enables endpoint 0 for control transfers.
PLIB_USB_EPnAttributesSet(MY_USB_INSTANCE, 0, 0, true, true);
// This enables endpoint 2 for non control transfer, direction
// is RX and handshake enable.
PLIB_USB_EPnAttributesSet(MY_USB_INSTANCE, 2, 1, false, true);
5.6.26.6.3.8 PLIB_USB_EPnControlTransferDisable Function
C
void PLIB_USB_EPnControlTransferDisable(
USB_MODULE_ID index,
uint8_t epValue
);
Description
This function disables endpoint control transfers when endpoint transmit and endpoint receive are both enabled.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3221
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is available.
Example
PLIB_USB_EPnControlTransferDisable(MY_USB_INSTANCE, someEP);
5.6.26.6.3.9 PLIB_USB_EPnControlTransferEnable Function
C
void PLIB_USB_EPnControlTransferEnable(
USB_MODULE_ID index,
uint8_t epValue
);
Description
This function enables endpoint control transfers when endpoint transmit and endpoint receive are both enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is available.
Example
PLIB_USB_EPnControlTransferEnable(MY_USB_INSTANCE, someEP);
5.6.26.6.3.10 PLIB_USB_EPnDirectionDisable Function
C
void PLIB_USB_EPnDirectionDisable(
USB_MODULE_ID index,
uint8_t epValue,
int direction
);
Description
Disables the specified endpoint direction.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3222
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
direction If 1, then TX direction is disabled. If 0 RX direction is disabled.
Returns
None.
Remarks
None.
Example
// This function disbles the TX direction of endpoint 1
PLIB_USB_EPnDirectionDisable(MY_USB_INSTANCE, 1, 1);
5.6.26.6.3.11 PLIB_USB_EPnHandshakeDisable Function
C
void PLIB_USB_EPnHandshakeDisable(
USB_MODULE_ID index,
uint8_t epValue
);
Description
This function disables endpoint handshaking. Typically used for Isochronous endpoints.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is available.
Example
PLIB_USB_EPnHandshakeDisable(MY_USB_INSTANCE, someEP);
5.6.26.6.3.12 PLIB_USB_EPnHandshakeEnable Function
C
void PLIB_USB_EPnHandshakeEnable(
USB_MODULE_ID index,
uint8_t epValue
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3223
);
Description
This function enables endpoint handshaking.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is available.
Example
PLIB_USB_EPnHandshakeEnable(MY_USB_INSTANCE, someEP);
5.6.26.6.3.13 PLIB_USB_EPnIsStalled Function
C
bool PLIB_USB_EPnIsStalled(
USB_MODULE_ID index,
uint8_t epValue
);
Description
This function tests whether the endpoint epValue is stalled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
Returns
• true - The endpoint is stalled
• false - The endpoint is not stalled
Remarks
Not valid before an endpoint is enabled. This feature may not be available on all devices. Please refer to the specific device data
sheet to determine availability or use PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is
available.
Example
if( PLIB_USB_EPnIsStalled(MY_USB_INSTANCE, someEP) )
{
// Handle the stall
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3224
}
5.6.26.6.3.14 PLIB_USB_EPnRxDisable Function
C
void PLIB_USB_EPnRxDisable(
USB_MODULE_ID index,
uint8_t endpoint
);
Description
This function disables an endpoint's ability to process IN tokens.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
endpoint Endpoint to be affected
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is available.
Example
//De-provision endpoint 3 to process IN Token
PLIB_USB_EPnRxDisable(MY_USB_INSTANCE, 3);
5.6.26.6.3.15 PLIB_USB_EPnRxEnable Function
C
void PLIB_USB_EPnRxEnable(
USB_MODULE_ID index,
uint8_t endpoint
);
Description
This function enables an endpoint to process IN tokens.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
endpoint Endpoint to be affected
Returns
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3225
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is available.
Example
//Provision endpoint 3 to process IN Token
PLIB_USB_EPnRxEnable(MY_USB_INSTANCE, 3);
5.6.26.6.3.16 PLIB_USB_EPnRxSelect Function
C
void PLIB_USB_EPnRxSelect(
USB_MODULE_ID index,
uint8_t epValue,
USB_EP_TXRX epTxRx
);
Description
This function selects receive capabilities of an endpoint.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
epTxRx Transmit/Receive setting for endpoint: USB_EP_RX, USB_EP_NOTXRX
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is available.
Example
PLIB_USB_EPnRxSelect(MY_USB_INSTANCE, someEP, USB_EP_RX);
5.6.26.6.3.17 PLIB_USB_EPnStallClear Function
C
void PLIB_USB_EPnStallClear(
USB_MODULE_ID index,
uint8_t epValue
);
Description
This function clears an endpoint's stalled flag.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3226
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
Returns
None.
Remarks
Not valid before an endpoint is enabled. This feature may not be available on all devices. Please refer to the specific device data
sheet to determine availability or use PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is
available.
Example
if( PLIB_USB_EPnIsStalled(MY_USB_INSTANCE, someEP) )
{
// Handle the stall
PLIB_USB_EPnStallClear(MY_USB_INSTANCE, someEP);
}
5.6.26.6.3.18 PLIB_USB_EPnTxDisable Function
C
void PLIB_USB_EPnTxDisable(
USB_MODULE_ID index,
uint8_t endpoint
);
Description
This function disables an endpoint's ability to process OUT tokens.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
endpoint Endpoint to be affected
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is available.
Example
//De-provision endpoint 3 to process OUT Token
PLIB_USB_EPnTxDisable(MY_USB_INSTANCE, 3);
5.6.26.6.3.19 PLIB_USB_EPnTxEnable Function
C
void PLIB_USB_EPnTxEnable(
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3227
USB_MODULE_ID index,
uint8_t endpoint
);
Description
This function enables an endpoint to process OUT tokens.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
endpoint Endpoint to be affected
Returns
None.
Remarks
None.
Example
//Provision endpoint 3 to process OUT Token
PLIB_USB_EPnTxEnable(MY_USB_INSTANCE, 3);
5.6.26.6.3.20 PLIB_USB_EPnTxRxSelect Function
C
void PLIB_USB_EPnTxRxSelect(
USB_MODULE_ID index,
uint8_t epValue,
USB_EP_TXRX epTxRx
);
Description
This function selects transmit and/or receive capabilities of an endpoint.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
epTxRx Transmit/Receive setting for endpoint: USB_EP_TX, USB_EP_RX,
USB_EP_TX_RX, USB_EP_NOTXRX
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3228
Example
PLIB_USB_EPnTxRxSelect(MY_USB_INSTANCE, someEP, USB_EP_TXRX);
5.6.26.6.3.21 PLIB_USB_EPnTxSelect Function
C
void PLIB_USB_EPnTxSelect(
USB_MODULE_ID index,
uint8_t epValue,
USB_EP_TXRX epTxRx
);
Description
This function selects transmit capabilities of an endpoint.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
epTxRx Transmit/Receive setting for endpoint: USB_EP_TX, USB_EP_NOTXRX
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEPnRxEnable in your application to determine whether this feature is available.
Example
PLIB_USB_EPnTxSelect(MY_USB_INSTANCE, someEP, USB_EP_TX);
5.6.26.6.4 Interrupts Functions
5.6.26.6.4.1 PLIB_USB_InterruptDisable Function
C
void PLIB_USB_InterruptDisable(
USB_MODULE_ID index,
USB_INTERRUPTS interruptFlag
);
Description
This function disables a general interrupt source for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3229
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsGEN_Interrupt in your application to determine whether this feature is available.
Example
PLIB_USB_InterruptDisable( MY_USB_INSTANCE, USB_INT_ERROR );
5.6.26.6.4.2 PLIB_USB_InterruptEnable Function
C
void PLIB_USB_InterruptEnable(
USB_MODULE_ID index,
USB_INTERRUPTS interruptFlag
);
Description
This function enables general interrupt sources of the USB module to trigger a USB interrupt.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsGEN_Interrupt in your application to determine whether this feature is available.
Example
PLIB_USB_InterruptEnable( MY_USB_INSTANCE, USB_INT_ERROR );
5.6.26.6.4.3 PLIB_USB_InterruptEnableGet Function
C
USB_INTERRUPTS PLIB_USB_InterruptEnableGet(
USB_MODULE_ID index
);
Description
Returns the enable/disable status of general USB module interrupts
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
A bit map containing status of enabled interrupts.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsGEN_Interrupt in your application to determine whether this feature is available.
Example
USB_INTERRUPTS enabledInterrupts;
enabledInterrupts = PLIB_USB_InterruptEnableGet( MY_USB_INSTANCE);
if(enabledInterrupts|USB_INT_ATTACH)
{
// This means Attach interrupt is enabled.
}
5.6.26.6.4.4 PLIB_USB_InterruptFlagAllGet Function
C
USB_INTERRUPTS PLIB_USB_InterruptFlagAllGet(
USB_MODULE_ID index
);
Description
This functoin returns a logically ORed bit map of active general USB interrupt flags.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
Returns a logically ORed bit map of active general USB interrupt flags.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsGEN_InterruptStatus in your application to determine whether this feature is available.
Example
USB_INTERRUPTS interruptEnables;
interruptEnables = PLIB_USB_InterruptFlagAllGet(MY_USB_INSTANCE);
if(interruptEnables | USB_INT_DEVICE_RESET)
{
// Device received reset signalling
}
5.6.26.6.4.5 PLIB_USB_InterruptFlagClear Function
C
void PLIB_USB_InterruptFlagClear(
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3231
USB_MODULE_ID index,
USB_INTERRUPTS interruptFlag
);
Description
This function clears a general interrupt source flag for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsGEN_InterruptStatus in your application to determine whether this feature is available.
Example
PLIB_USB_InterruptFlagClear( MY_USB_INSTANCE, USB_INT_ERROR );
5.6.26.6.4.6 PLIB_USB_InterruptFlagGet Function
C
bool PLIB_USB_InterruptFlagGet(
USB_MODULE_ID index,
USB_INTERRUPTS interruptFlag
);
Description
This function tests a general interrupt source flag for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsGEN_InterruptStatus in your application to determine whether this feature is available.
Example
if ( PLIB_USB_InterruptFlagGet(MY_USB_INSTANCE,USB_INT_ANY) )
if ( PLIB_USB_InterruptFlagGet(MY_USB_INSTANCE,USB_INT_ERROR) )
{
PLIB_USB_InterruptFlagClear(MY_USB_INSTANCE,USB_INT_ERROR);
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3232
// Error clean up
}
if ( PLIB_USB_InterruptFlagGet(MY_USB_INSTANCE,USB_INT_HOST_DETACH) )
{
PLIB_USB_InterruptFlagClear(MY_USB_INSTANCE,USB_INT_HOST_DETACH);
// Device detached clean up
}
.
.
.
}
5.6.26.6.4.7 PLIB_USB_InterruptFlagSet Function
C
void PLIB_USB_InterruptFlagSet(
USB_MODULE_ID index,
USB_INTERRUPTS interruptFlag
);
Description
This function sets a general interrupt source flag for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsGEN_InterruptStatus in your application to determine whether this feature is available.
Example
PLIB_USB_InterruptFlagSet( MY_USB_INSTANCE, USB_INT_ERROR );
5.6.26.6.4.8 PLIB_USB_InterruptIsEnabled Function
C
bool PLIB_USB_InterruptIsEnabled(
USB_MODULE_ID index,
USB_INTERRUPTS interruptFlag
);
Description
This function returns true if interrupts are enabled.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
• true - Interrupts are enabled
• false - Interrupts are not enabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsGEN_Interrupt in your application to determine whether this feature is available.
Example
if ( PLIB_USB_InterruptIsEnabled( MY_USB_INSTANCE, USB_INT_ERROR ) )
{
}
5.6.26.6.5 Error Interrupts Functions
5.6.26.6.5.1 PLIB_USB_ErrorInterruptDisable Function
C
void PLIB_USB_ErrorInterruptDisable(
USB_MODULE_ID index,
USB_ERROR_INTERRUPTS interruptFlag
);
Description
This function disables an error interrupt source for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsERR_Interrupt in your application to determine whether this feature is available.
Example
PLIB_USB_ErrorInterruptDisable( MY_USB_INSTANCE, USB_ERR_INT_BAD_CRC16 );
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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5.6.26.6.5.2 PLIB_USB_ErrorInterruptEnable Function
C
void PLIB_USB_ErrorInterruptEnable(
USB_MODULE_ID index,
USB_ERROR_INTERRUPTS interruptFlag
);
Description
This function enables error interrupt sources of the USB module to trigger a USB interrupt.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsERR_Interrupt in your application to determine whether this feature is available.
Example
PLIB_USB_ErrorInterruptEnable( MY_USB_INSTANCE, USB_ERR_INT_BAD_CRC16 );
5.6.26.6.5.3 PLIB_USB_ErrorInterruptFlagAllGet Function
C
USB_ERROR_INTERRUPTS PLIB_USB_ErrorInterruptFlagAllGet(
USB_MODULE_ID index
);
Description
This function returns a logically ORed bit map of active error interrupt flags.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
Returns a logically ORed bit map of active error interutp flags.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsERR_InterruptStatus in your application to determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3235
Example
USB_ERROR_INTERRUPTS errorInterruptEnables;
errorInterruptEnables = PLIB_USB_ErrorInterruptFlagAllGet(MY_USB_INSTANCE);
if(errorInterruptEnables | USB_ERR_INT_DEVICE_EOF_ERROR)
{
// End of frame error occurred.
}
5.6.26.6.5.4 PLIB_USB_ErrorInterruptFlagClear Function
C
void PLIB_USB_ErrorInterruptFlagClear(
USB_MODULE_ID index,
USB_ERROR_INTERRUPTS interruptFlag
);
Description
This function clears an error interrupt source flag for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
None.
Example
PLIB_USB_ErrorInterruptFlagClear( MY_USB_INSTANCE, USB_ERR_INT_BAD_CRC16 );
5.6.26.6.5.5 PLIB_USB_ErrorInterruptFlagGet Function
C
bool PLIB_USB_ErrorInterruptFlagGet(
USB_MODULE_ID index,
USB_ERROR_INTERRUPTS interruptFlag
);
Description
This function tests an error interrupt source flag for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3236
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsERR_InterruptStatus in your application to determine whether this feature is available.
Example
if ( PLIB_USB_ErrorInterruptFlagGet(MY_USB_INSTANCE,USB_ERR_INT_ANY) )
if ( PLIB_USB_ErrorInterruptFlagGet(MY_USB_INSTANCE,USB_ERR_INT_PID_CHECK_FAILURE) )
{
PLIB_USB_ErrorInterruptFlagClear(MY_USB_INSTANCE,USB_ERR_INT_PID_CHECK_FAILURE);
// PID Error Check failure cleanup
}
if ( PLIB_USB_ErrorInterruptFlagGet(MY_USB_INSTANCE,USB_ERR_INT_DEVICE_EOF_ERROR) )
{
PLIB_USB_ErrorInterruptFlagClear(MY_USB_INSTANCE,USB_ERR_INT_DEVICE_EOF_ERROR);
// EOF error cleanup
}
.
.
.
}
5.6.26.6.5.6 PLIB_USB_ErrorInterruptFlagSet Function
C
void PLIB_USB_ErrorInterruptFlagSet(
USB_MODULE_ID index,
USB_ERROR_INTERRUPTS interruptFlag
);
Description
This function sets an error interrupt source flag for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsERR_InterruptStatus in your application to determine whether this feature is available.
Example
PLIB_USB_ErrorInterruptFlagSet( MY_USB_INSTANCE, USB_ERR_INT_BAD_CRC16 );
5.6.26.6.5.7 PLIB_USB_ErrorInterruptIsEnabled Function
C
bool PLIB_USB_ErrorInterruptIsEnabled(
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3237
USB_MODULE_ID index,
USB_INTERRUPTS interruptFlag
);
Description
This function determines whether interrupts are enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
• true - Interrupts are enabled
• false - Interrupts are not enabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsERR_InterruptStatus in your application to determine whether this feature is available.
Example
if ( PLIB_USB_ErrorInterruptIsEnabled( MY_USB_INSTANCE, USB_ERR_INT_BAD_CRC16 ) )
{
}
5.6.26.6.6 Last Transaction Status Functions
5.6.26.6.6.1 PLIB_USB_LastTransactionDetailsGet Function
C
void PLIB_USB_LastTransactionDetailsGet(
USB_MODULE_ID index,
USB_BUFFER_DIRECTION * direction,
USB_PING_PONG_STATE * pingpong,
uint8_t * endpoint
);
Description
This function returns the details of the last completed transaction.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
direction Return value contains direction of the last transfer
pingpong Return value contains Ping-Pong indication of the the last transfer
endpoint Return value contains the endpoint which processed the last transfer
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3238
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsLastTransactionDetails in your application to determine whether this feature is available.
Example
USB_BUFFER_DIRECTION direction;
USB_PING_PONG_STATE pingpong;
uint8_t endpoint;
interruptEnables = PLIB_USB_InterruptFlagAllGet(MY_USB_INSTANCE);
if(interruptEnables | USB_INT_TOKEN_DONE)
{
// Find out details of the token
PLIB_USB_LastTransactionDetailsGet(MY_USB_INSTANCE, &direction,
&pingpong, &endpoint);
}
5.6.26.6.6.2 PLIB_USB_LastTransactionDirectionGet Function
C
USB_BUFFER_DIRECTION PLIB_USB_LastTransactionDirectionGet(
USB_MODULE_ID index
);
Description
This function indicates the direction of the last transaction, either transmit or receive.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
USB_LastDirection: USB_RECEIVE_TRANSFER or USB_TRANSMIT_TRANSFER
Remarks
None.
Example
See PLIB_USB_LastTransactionEndPtGet.
5.6.26.6.6.3 PLIB_USB_LastTransactionEndPtGet Function
C
uint8_t PLIB_USB_LastTransactionEndPtGet(
USB_MODULE_ID index
);
Description
This function returns the endpoint number of the last USB transfer, which is actually the index into the Buffer Descriptor Table of
the last USB transfer.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3239
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
endPoint - Endpoint of last completed USB transfer
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsLastDirection in your application to determine whether this feature is available.
Example
while ( !PLIB_USB_INT_FlagGet(MY_USB_INSTANCE,USB_INT_GEN,TOKEN_DONE) )
{
// Do nothing, wait until completion of next transaction
}
// Retrieve information relating to the last completed transaction
endpoint = PLIB_USB_LastTransactionEndPtGet(MY_USB_INSTANCE);
direction = PLIB_USB_LastTransactionDirectionGet(MY_USB_INSTANCE);
pingPongState = PLIB_USB_LastTransactionPingPongStateGet(MY_USB_INSTANCE);
// Clearing the Token Processing Done flag advances the status FIFO to
// oldest transaction in the FIFO. Wait for completion of next transaction
// before using PLIB_USB_Last*Get functions again to read status.
PLIB_USB_INT_FlagClear(MY_USB_INSTANCE,USB_INT_GEN,TOKEN_DONE);
5.6.26.6.6.4 PLIB_USB_LastTransactionPingPongStateGet Function
C
USB_PING_PONG_STATE PLIB_USB_LastTransactionPingPongStateGet(
USB_MODULE_ID index
);
Description
This function indicates whether the last transaction was to an Even buffer or an Odd buffer.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
USB_PING_PONG_STATE.
Remarks
Not valid if PIC18 or PIC24F endpoint does not have ping-pong buffering enabled. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use PLIB_USB_ExistsLastPingPong in your
application to determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3240
Example
See PLIB_USB_LastTransactionEndPtGet.
5.6.26.6.7 Host Functions
5.6.26.6.7.1 PLIB_USB_IsBusyWithToken Function
C
bool PLIB_USB_IsBusyWithToken(
USB_MODULE_ID index
);
Description
This function indicates whether there is a token being executed by the USB module as Host. Software should check that the
previous token is finished before issuing a new token.
Preconditions
USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not applicable for PIC18 devices since PIC18 devices do not support Host mode. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use PLIB_USB_ExistsHostBusyWithToken in
your application to determine whether this feature is available.
Example
while( PLIB_USB_IsBusyWithToken(MY_USB_INSTANCE) )
{
// do nothing
}
// Issue new token
5.6.26.6.7.2 PLIB_USB_SOFDisable Function
C
void PLIB_USB_SOFDisable(
USB_MODULE_ID index
);
Description
This function disables the automatic generation of the SOF token.
Preconditions
USB module must be in Host mode.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3241
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not applicable for PIC18 devices since PIC18 devices do not support Host mode. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use PLIB_USB_ExistsStartOfFrames in your
application to determine whether this feature is available.
Example
PLIB_USB_SOFDisable(MY_USB_INSTANCE);
5.6.26.6.7.3 PLIB_USB_SOFEnable Function
C
void PLIB_USB_SOFEnable(
USB_MODULE_ID index
);
Description
This function enables the automatic generation of the SOF token every 1 ms.
Preconditions
USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not applicable for PIC18 devices since PIC18 devices do not support Host mode. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use PLIB_USB_ExistsStartOfFrames in your
application to determine whether this feature is available.
Example
PLIB_USB_SOFEnable(MY_USB_INSTANCE);
5.6.26.6.7.4 PLIB_USB_SOFThresholdGet Function
C
uint8_t PLIB_USB_SOFThresholdGet(
USB_MODULE_ID index
);
Description
This functin returns the Start-of-Frame (SOF) Count bits. (Value represents 10 + (packet size of n bytes);).
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3242
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
SOF threshold value.
Remarks
Host mode only.
SOF Threshold Value = packet byte count + 10
= 0b0100_1010 = 0x4A = 74 for 64-byte packet
= 0b0010_1010 = 0x2A = 42 for 32-byte packet
= 0b0001_1010 = 0x1A = 26 for 16-byte packet
= 0x0001_0010 = 0x12 = 18 for 8-byte packet
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsSOFThreshold in your application to determine whether this feature is available.
Example
thresholdSOF = PLIB_USB_SOFThresholdGet(MY_USB_INSTANCE);
5.6.26.6.7.5 PLIB_USB_SOFThresholdSet Function
C
void PLIB_USB_SOFThresholdSet(
USB_MODULE_ID index,
uint8_t threshold
);
Description
This function sets the Start-of-Frame (SOF) threshold value.
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
threshold SOF threshold
Returns
None.
Remarks
Host mode only.
SOF Threshold Value = packet byte count + 10
= 0b0100_1010 = 0x4A = 74 for 64-byte packet
= 0b0010_1010 = 0x2A = 42 for 32-byte packet
= 0b0001_1010 = 0x1A = 26 for 16-byte packet
= 0x0001_0010 = 0x12 = 18 for 8-byte packet
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3243
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsSOFThreshold in your application to determine whether this feature is available.
Example
// Set SOF threshold for 64-byte packets
PLIB_USB_SOFThresholdSet(MY_USB_INSTANCE,64+10);
5.6.26.6.7.6 PLIB_USB_TokenEPGet Function
C
uint8_t PLIB_USB_TokenEPGet(
USB_MODULE_ID index
);
Description
This function returns the address of the specified Endpoint.
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
Endpoint value - 0 <= epValue <= Module Maximum Endpoint.
Remarks
Host mode only.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsTokenEP in your application to determine whether this feature is available.
Example
someEP = PLIB_USB_TokenEPGet(MY_USB_INSTANCE);
5.6.26.6.7.7 PLIB_USB_TokenEPSet Function
C
void PLIB_USB_TokenEPSet(
USB_MODULE_ID index,
uint8_t epValue
);
Description
This function sets the Endpoint address for a host transaction.
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
epValue Endpoint value, 0 <= epValue <= Module Maximum Endpoint
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Returns
None.
Remarks
Host mode only. This feature may not be available on all devices. Please refer to the specific device data sheet to determine
availability or use PLIB_USB_ExistsTokenEP in your application to determine whether this feature is available.
Example
uint8_t someEP = 0x03;
PLIB_USB_TokenEPSet(MY_USB_INSTANCE, someEP);
5.6.26.6.7.8 PLIB_USB_TokenPIDGet Function
C
USB_PID PLIB_USB_TokenPIDGet(
USB_MODULE_ID index
);
Description
This function returns the token transaction type.
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
Packet ID of token, USB_PID_SETUP, USB_PID_IN, or USB_PID_OUT
Remarks
Host mode only. This feature may not be available on all devices. Please refer to the specific device data sheet to determine
availability or use PLIB_USB_ExistsTokenPID in your application to determine whether this feature is available.
Example
somePID = PLIB_USB_TokenPIDGet(MY_USB_INSTANCE);
5.6.26.6.7.9 PLIB_USB_TokenPIDSet Function
C
void PLIB_USB_TokenPIDSet(
USB_MODULE_ID index,
USB_PID pidValue
);
Description
This function sets the token transaction type to pidValue.
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3245
pidValue USB_PID_SETUP, USB_PID_IN, or USB_PID_OUT
Returns
None.
Remarks
Host mode only. This feature may not be available on all devices. Please refer to the specific device data sheet to determine
availability or use PLIB_USB_ExistsTokenPID in your application to determine whether this feature is available.
Example
somePID = USB_PID_SETUP;
PLIB_USB_TokenPIDSet (MY_USB_INSTANCE, somePID );
5.6.26.6.7.10 PLIB_USB_TokenSpeedSelect Function
C
void PLIB_USB_TokenSpeedSelect(
USB_MODULE_ID index,
USB_TOKEN_SPEED tokenSpeed
);
Description
This function selects low speed or full speed for subsequent token executions.
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
tokenSpeed Speed for next token execution: USB_LOWSPEED_TOKENS or
USB_FULLSPEED_TOKENS
Returns
None.
Remarks
Not applicable for PIC18 devices since PIC18 devices do not support Host mode. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use PLIB_USB_ExistsNextTokenSpeed in your
application to determine whether this feature is available.
Example
PLIB_USB_TokenSpeedSet(MY_USB_INSTANCE,USB_LOWSPEED_TOKENS);
5.6.26.6.8 USB Bus Signaling Functions
5.6.26.6.8.1 PLIB_USB_ResetSignalDisable Function
C
void PLIB_USB_ResetSignalDisable(
USB_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Description
This function disables reset signalling on the USB bus.
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not applicable for PIC18, since USB Host functionality is Not available on PIC18 devices. This feature may not be available on
all devices. Please refer to the specific device data sheet to determine availability or use PLIB_USB_ExistsHostGeneratesReset
in your application to determine whether this feature is available.
Example
See PLIB_USB_ResetSignalEnable.
5.6.26.6.8.2 PLIB_USB_ResetSignalEnable Function
C
void PLIB_USB_ResetSignalEnable(
USB_MODULE_ID index
);
Description
This function enables reset signalling on the USB bus.
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not applicable for PIC18, since USB Host functionality is Not available on PIC18 devices. This feature may not be available on
all devices. Please refer to the specific device data sheet to determine availability or use PLIB_USB_ExistsHostGeneratesReset
in your application to determine whether this feature is available.
Example
// Snippet to perform a software reset:
PLIB_USB_ResetSignalEnable(MY_USB_INSTANCE);
// ... delay 50ms
PLIB_USB_ResetSignalDisable(MY_USB_INSTANCE);
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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5.6.26.6.8.3 PLIB_USB_ResumeSignalingDisable Function
C
void PLIB_USB_ResumeSignalingDisable(
USB_MODULE_ID index
);
Description
This function disables resume signaling.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsResumeSignaling in your application to determine whether this feature is available.
Example
See PLIB_USB_ResumeSignalingEnable.
5.6.26.6.8.4 PLIB_USB_ResumeSignalingEnable Function
C
void PLIB_USB_ResumeSignalingEnable(
USB_MODULE_ID index
);
Description
This function enables resume signalling. Resume allows the peripheral to perform a remote wake-up by executing resume
signaling.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Software must enable resume signaling for 10 ms if the device is in Device mode, or for 25 ms if the device is in Host mode, and
then disable resume signaling to enable remote wake-up. In Host mode, the USB module will append a low-speed EOP to the
end resume signaling when it is disabled. This feature may not be available on all devices. Please refer to the specific device
data sheet to determine availability or use PLIB_USB_ExistsResumeSignaling in your application to determine whether this
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3248
feature is available.
Example
// Perform resume signaling:
PLIB_USB_ResumeSignalingEnable(MY_USB_INSTANCE);
// Delay 10ms
PLIB_USB_ResumeSignalingDisable(MY_USB_INSTANCE);
5.6.26.6.9 On-The-Go (OTG) Functions
5.6.26.6.9.1 PLIB_USB_OTG_BSessionHasEnded Function
C
bool PLIB_USB_OTG_BSessionHasEnded(
USB_MODULE_ID index
);
Description
This function returns the status of the B-Session End Indicator bit.
Preconditions
The USB module must be in OTG mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
• true - The VBUS Voltage is below VB_SESS_END on the B-device
• false - The VBUS voltage is above VB_SESS_END on the B-device
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsOTG_BSessionEnd in your application to determine whether this feature is
available.
Example
if ( !PLIB_USB_OTG_BSessionHasEnded(MY_USB_INSTANCE) )
{
// B session valid
}
else
{
// B session not valid
}
5.6.26.6.9.2 PLIB_USB_OTG_IDPinStateIsTypeA Function
C
bool PLIB_USB_OTG_IDPinStateIsTypeA(
USB_MODULE_ID index
);
Description
This function returns ID Pin state.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Preconditions
The USB module must be in OTG mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
• true - Type A Cable attached,
• false - No cable is attached or a Type B cable is attached
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsOTG_IDPinState in your application to determine whether this feature is
available.
Example
if ( PLIB_USB_OTG_IDPinStateIsTypeA(MY_USB_INSTANCE) )
{
// Type A cable attached
}
else
{
// No cable or Type B cable attached
};
5.6.26.6.9.3 PLIB_USB_OTG_LineStateIsStable Function
C
bool PLIB_USB_OTG_LineStateIsStable(
USB_MODULE_ID index
);
Description
This function returns the status of the Line Stable Indicator bit.
Preconditions
The USB module must be in OTG mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
• true - The USB line state has been stable for the previous 1 ms
• false - The USB line state has not been stable for the previous 1 ms
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsOTG_LineState in your application to determine whether this feature is
available.
Example
if( PLIB_USB_OTG_LineStateIsStable(MY_USB_INSTANCE) ) {
// Line has been stable
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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// ... rest of code ...
}
5.6.26.6.9.4 PLIB_USB_OTG_PullUpPullDownSetup Function
C
void PLIB_USB_OTG_PullUpPullDownSetup(
USB_MODULE_ID index,
USB_OTG_PULL_UP_PULL_DOWN resistor,
bool enableResistor
);
Description
This function enables or disables pull-up and pull-down resistors.
Preconditions
USB On-The-Go (OTG) must be enabled.
Parameters
Parameters Description
index Identifier for the device instance of interest
resistor USB_OTG_DPLUS_PULLUP, USB_OTG_DMINUS_PULLUP,
USB_OTG_DPLUS_PULLDN, or USB_OTG_DMINUS_PULLDN
enableResistor true to enable resistor, false to disable it
Returns
None.
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsOTG_PullUpPullDown in your application to determine whether this feature is
available.
Example
// Enable pull-up resistor for D+
PLIB_USB_OTG_PullUpPullDownSetup(MY_USB_INSTANCE,USB_OTG_DPLUS_PULLUP,true);
5.6.26.6.9.5 PLIB_USB_OTG_SessionValid Function
C
bool PLIB_USB_OTG_SessionValid(
USB_MODULE_ID index
);
Description
This function returns the status of the Session Valid Indicator bit.
Preconditions
The USB module must be in OTG mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
• true - The VBUS voltage is above Session Valid on the A or B device
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3251
• false - The VBUS voltage is below Session Valid on the A or B device
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsOTG_SessionValid in your application to determine whether this feature is
available.
Example
if ( PLIB_USB_OTG_SessionValid(MY_USB_INSTANCE) )
{
// Session valid
}
else
{
// Session not valid
}
5.6.26.6.9.6 PLIB_USB_OTG_VBusChargeDisable Function
C
void PLIB_USB_OTG_VBusChargeDisable(
USB_MODULE_ID index
);
Description
This function disables VBUS line charge.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 or PIC32 devices. This feature may not be available on all devices. Please refer to the specific device
data sheet to determine availability or use PLIB_USB_ExistsOTG_VbusCharge in your application to determine whether this
feature is available.
Example
PLIB_USB_OTG_VBusChargeDisable(MY_USB_INSTANCE);
5.6.26.6.9.7 PLIB_USB_OTG_VBusChargeEnable Function
C
void PLIB_USB_OTG_VBusChargeEnable(
USB_MODULE_ID index
);
Description
This function enables the VBUS line to be charged through a pull-up resistor.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 or PIC32 devices. This feature may not be available on all devices. Please refer to the specific device
data sheet to determine availability or use PLIB_USB_ExistsOTG_VbusDischarge in your application to determine whether this
feature is available.
Example
PLIB_USB_OTG_VBusChargeEnable(MY_USB_INSTANCE);
5.6.26.6.9.8 PLIB_USB_OTG_VBusChargeTo3V Function
C
void PLIB_USB_OTG_VBusChargeTo3V(
USB_MODULE_ID index
);
Description
This function sets the VBUS line to charge to 3.3V.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 or PIC32 devices.
Example
PLIB_USB_OTG_VBusChargeTo3V(MY_USB_INSTANCE);
5.6.26.6.9.9 PLIB_USB_OTG_VBusChargeTo5V Function
C
void PLIB_USB_OTG_VBusChargeTo5V(
USB_MODULE_ID index
);
Description
This function sets the VBUS line to charge to 5V.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 or PIC32 devices.
Example
PLIB_USB_OTG_VBusChargeTo5V (MY_USB_INSTANCE);
5.6.26.6.9.10 PLIB_USB_OTG_VBusDischargeDisable Function
C
void PLIB_USB_OTG_VBusDischargeDisable(
USB_MODULE_ID index
);
Description
This function disables VBUS line discharge.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 or PIC32 devices. This feature may not be available on all devices. Please refer to the specific device
data sheet to determine availability or use PLIB_USB_ExistsOTG_VbusDischarge in your application to determine whether this
feature is available.
Example
PLIB_USB_OTG_VBusDischargeDisable(MY_USB_INSTANCE);
5.6.26.6.9.11 PLIB_USB_OTG_VBusDischargeEnable Function
C
void PLIB_USB_OTG_VBusDischargeEnable(
USB_MODULE_ID index
);
Description
This function enables the VBUS line to be discharged through a resistor.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 or PIC32 devices. This feature may not be available on all devices. Please refer to the specific device
data sheet to determine availability or use PLIB_USB_ExistsOTG_VbusCharge in your application to determine whether this
feature is available.
Example
PLIB_USB_OTG_VBusDischargeEnable(MY_USB_INSTANCE);
5.6.26.6.9.12 PLIB_USB_OTG_VBusPowerOff Function
C
void PLIB_USB_OTG_VBusPowerOff(
USB_MODULE_ID index
);
Description
This function turns off power on the VBUS Line.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsOTG_VbusPowerOnOff in your application to determine whether this feature is
available.
Example
PLIB_USB_OTG_VBusPowerOff(MY_USB_INSTANCE);
5.6.26.6.9.13 PLIB_USB_OTG_VBusPowerOn Function
C
void PLIB_USB_OTG_VBusPowerOn(
USB_MODULE_ID index
);
Description
This function turns on power for the VBUS line.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3255
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsOTG_VbusPowerOnOff in your application to determine whether this feature is
available.
Example
PLIB_USB_OTG_VBusPowerOn(MY_USB_INSTANCE);
5.6.26.6.9.14 PLIB_USB_OTG_VBusValid Function
C
bool PLIB_USB_OTG_VBusValid(
USB_MODULE_ID index
);
Description
This function returns the status of the A-VBUS valid indicator.
Preconditions
The USB module must be in OTG mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
• true - The VBUS voltage is above VA_VBUS_VLD on the A-device,
• false - The VBUS voltage is below VA_VBUS_VLD on the A-device
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsOTG_ASessionValid in your application to determine whether this feature is
available.
Example
if ( PLIB_USB_OTG_VBusValid(MY_USB_INSTANCE) )
{
// Vbus voltage above session valid for A device
}
else
{
// Vbus voltage below session valid for A device
}
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5.6.26.6.10 OTG Interrupts Functions
5.6.26.6.10.1 PLIB_USB_OTG_InterruptDisable Function
C
void PLIB_USB_OTG_InterruptDisable(
USB_MODULE_ID index,
USB_OTG_INTERRUPTS interruptFlag
);
Description
This function disables a USB On-The-Go (OTG) interrupt source for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsOTG_Interrupt in your application to determine whether this feature is available.
Example
PLIB_USB_OTG_InterruptDisable( MY_USB_INSTANCE, USB_OTG_INT_ID_STATE_CHANGE );
5.6.26.6.10.2 PLIB_USB_OTG_InterruptEnable Function
C
void PLIB_USB_OTG_InterruptEnable(
USB_MODULE_ID index,
USB_OTG_INTERRUPTS interruptFlag
);
Description
This function enables USB On-The-Go (OTG) interrupt sources of the USB module to trigger a USB interrupt.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
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Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsOTG_Interrupt in your application to determine whether this feature is available.
Example
PLIB_USB_OTG_InterruptEnable( MY_USB_INSTANCE, USB_OTG_INT_ID_STATE_CHANGE );
5.6.26.6.10.3 PLIB_USB_OTG_InterruptFlagClear Function
C
void PLIB_USB_OTG_InterruptFlagClear(
USB_MODULE_ID index,
USB_OTG_INTERRUPTS interruptFlag
);
Description
This function clears a USB On-The-Go (OTG) interrupt source flag for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsOTG_InterruptStatus in your application to determine whether this feature is available.
Example
PLIB_USB_OTG_InterruptFlagClear( MY_USB_INSTANCE, USB_OTG_INT_ID_STATE_CHANGE );
5.6.26.6.10.4 PLIB_USB_OTG_InterruptFlagGet Function
C
bool PLIB_USB_OTG_InterruptFlagGet(
USB_MODULE_ID index,
USB_OTG_INTERRUPTS interruptFlag
);
Description
This function tests a USB On-The-Go (OTG) interrupt source flag for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsOTG_InterruptStatus in your application to determine whether this feature is available.
Example
if ( PLIB_USB_OTG_InterruptFlagGet(MY_USB_INSTANCE,USB_OTG_INT_ANY) )
if ( PLIB_USB_OTG_InterruptFlagGet(MY_USB_INSTANCE,USB_OTG_INT_BDEVICE_SESSION_END) )
{
PLIB_USB_OTG_InterruptFlagClear(MY_USB_INSTANCE,USB_OTG_INT_ADEVICE_VBUS_VALID );
// Device A Vbus Valid Change
}
if ( PLIB_USB_OTG_InterruptFlagGet(MY_USB_INSTANCE,USB_OTG_INT_BDEVICE_SESSION_END) )
{
PLIB_USB_OTG_InterruptFlagClear(MY_USB_INSTANCE,USB_OTG_INT_BDEVICE_SESSION_END);
// Device B Vbus Valid Change
}
.
.
.
}
5.6.26.6.10.5 PLIB_USB_OTG_InterruptFlagSet Function
C
void PLIB_USB_OTG_InterruptFlagSet(
USB_MODULE_ID index,
USB_OTG_INTERRUPTS interruptFlag
);
Description
This function sets a USB On-The-Go (OTG) interrupt source flag for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsOTG_InterruptStatus in your application to determine whether this feature is available.
Example
PLIB_USB_OTG_InterruptFlagSet( MY_USB_INSTANCE, USB_OTG_INT_ID_STATE_CHANGE );
5.6.26.6.10.6 PLIB_USB_OTG_InterruptIsEnabled Function
C
bool PLIB_USB_OTG_InterruptIsEnabled(
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3259
USB_MODULE_ID index,
USB_INTERRUPTS interruptFlag
);
Description
This function returns whether or not interrupts are enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
interruptFlag Interrupt
Returns
• true - Interrupts are enabled
• false - Interrupts are not enabled
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsOTG_Interrupt in your application to determine whether this feature is available.
Example
if ( PLIB_USB_OTG_InterruptIsEnabled( MY_USB_INSTANCE, USB_OTG_INT_ID_STATE_CHANGE ) )
{
}
5.6.26.6.11 USB Activity Functions
5.6.26.6.11.1 PLIB_USB_ActivityPending Function
C
bool PLIB_USB_ActivityPending(
USB_MODULE_ID index
);
Description
This function returns whether or not USB bus activity has been detected, an interrupt is pending, or an interrupt is yet to be
generated.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
• true - The USB module should not be suspended
• false - No interrupts are pending or module may be suspended or powered down
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3260
Remarks
Not available on PIC18 devices. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsActivityPending in your application to determine whether this feature is
available.
Example
while ( PLIB_USB_ActivityPending(MY_USB_INSTANCE) )
{
// Wait
}
// Suspend USB module.
5.6.26.6.11.2 PLIB_USB_FrameNumberGet Function
C
uint16_t PLIB_USB_FrameNumberGet(
USB_MODULE_ID index
);
Description
This function returns the USB frame number in the lower 11 bits.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
Current frame number in lower 11 bits.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsFrameNumber in your application to determine whether this feature is available.
Example
frameNumber = PLIB_USB_FrameNumberGet(MY_USB_INSTANCE);
5.6.26.6.11.3 PLIB_USB_JStateIsActive Function
C
bool PLIB_USB_JStateIsActive(
USB_MODULE_ID index
);
Description
This function indicates the live JState (differential '0' in low speed, differential '1' in full speed) on the bus.
Preconditions
The USB module must be in Host mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
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Returns
None.
Remarks
Not applicable for PIC18 devices since PIC18 devices do not support Host mode. This feature may not be available on all
devices. Please refer to the specific device data sheet to determine availability or use PLIB_USB_ExistsLiveJState in your
application to determine whether this feature is available.
Example
// Enable Host Mode
PLIB_USB_OperatingModeSelect(MY_USB_INSTANCE,USB_OPMODE_HOST);
// Enable D+ and D- pull-down resistors
PLIB_USB_OTG_PullUpPullDownSetup(MY_USB_INSTANCE,USB_OTG_DPLUS_PULLDN, true);
PLIB_USB_OTG_PullUpPullDownSetup(MY_USB_INSTANCE,USB_OTG_DMINUS_PULLDN,true);
// Disable D+ and D- pull-up resistors
PLIB_USB_OTG_PullUpPullDownSetup(MY_USB_INSTANCE,USB_OTG_DPLUS_PULLUP, false);
PLIB_USB_OTG_PullUpPullDownSetup(MY_USB_INSTANCE,USB_OTG_DMINUS_PULLUP,false);
// Enable SOF Packet generation
PLIB_USB_SOFEnable(MY_USB_INSTANCE);
// Enable the device attach interrupt
PLIB_USB_INT_Enable(MY_USB_INSTANCE,USB_INT_OTG,ACTIVITY_DETECT);
// Wait for the Attach interrupt.
while(!PLIB_USB_INT_FlagGet(MY_USB_INSTANCE,USB_INT_OTG,ACTIVITY_DETECT) )
{
//Do nothing
}
// Check JState
if( PLIB_USB_JStateIsActive(MY_USB_INSTANCE) )
{
// Full Speed
PLIB_USB_FullSpeedEnable(MY_USB_INSTANCE);
}
else
{
// Low Speed
PLIB_USB_FullSpeedDisable(MY_USB_INSTANCE);
}
5.6.26.6.11.4 PLIB_USB_PacketTransferDisable Function
C
void PLIB_USB_PacketTransferDisable(
USB_MODULE_ID index
);
Description
This function disables the Serial Interface Engine (SIE).
Preconditions
USB module must be in device mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
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Returns
None.
if( PLIB_USB_PacketTransferIsDisabled(MY_USB_INSTANCE) )
{
// SETUP token received, do the needful operations
.
.
.
// SETUP handling completed, enable Setup token and packet processing:
PLIB_USB_PacketTransferDisable(MY_USB_INSTANCE);
}
Remarks
Not valid when the USB module is in Host mode. This feature may not be available on all devices. Please refer to the specific
device data sheet to determine availability or use PLIB_USB_ExistsPacketTransfer in your application to determine whether this
feature is available.
5.6.26.6.11.5 PLIB_USB_PacketTransferEnable Function
C
void PLIB_USB_PacketTransferEnable(
USB_MODULE_ID index
);
Description
This function re-enables the Serial Interface Engine (SIE), allowing token and packet processing.
Preconditions
USB module must be in device mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
if( PLIB_USB_PacketTransferIsDisabled(MY_USB_INSTANCE) )
{
// SETUP token received, do the needful operations
.
.
.
// SETUP handling completed, enable Setup token and packet processing:
PLIB_USB_PacketTransferEnable(MY_USB_INSTANCE);
}
Remarks
Not valid when the USB module is in Host mode. This feature may not be available on all devices. Please refer to the specific
device data sheet to determine availability or use PLIB_USB_ExistsPacketTransfer in your application to determine whether this
feature is available.
5.6.26.6.11.6 PLIB_USB_PacketTransferIsDisabled Function
C
bool PLIB_USB_PacketTransferIsDisabled(
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3263
USB_MODULE_ID index
);
Description
This function indicates that a setup token has been received from the Host and that the Serial Interface Engine (SIE) has been
turned off, disabling token and packet processing.
Preconditions
USB module must be in device mode.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Not valid when USB is Host. This feature may not be available on all devices. Please refer to the specific device data sheet to
determine availability or use PLIB_USB_ExistsPacketTransfer in your application to determine whether this feature is available.
Example
if( PLIB_USB_PacketTransferIsDisabled(MY_USB_INSTANCE) )
{
// SETUP token received, do the needful operations
.
.
.
// SETUP handling completed, enable Setup token and packet processing:
PLIB_USB_PacketTransferEnable(MY_USB_INSTANCE);
}
5.6.26.6.11.7 PLIB_USB_SE0InProgress Function
C
bool PLIB_USB_SE0InProgress(
USB_MODULE_ID index
);
Description
This function returns whether a single-ended zero event is in progress.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
• true - A single ended zero event (SE0) is occurring
• false - A single-ended zero event (SE0) is not occurring
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsLiveSingleEndedZero in your application to determine whether this feature is available.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3264
Example
if( PLIB_USB_SE0InProgress(MY_USB_INSTANCE) )
{
// handle the SE0 event
}
5.6.26.6.12 External Transceiver Support Functions
5.6.26.6.12.1 PLIB_USB_I2CInterfaceForExtModuleDisable Function
C
void PLIB_USB_I2CInterfaceForExtModuleDisable(
USB_MODULE_ID index
);
Description
Specifies that external module(s) are controlled via dedicated pins.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_I2CInterfaceForExtModuleDisable(MY_USB_INSTANCE);
5.6.26.6.12.2 PLIB_USB_I2CInterfaceForExtModuleEnable Function
C
void PLIB_USB_I2CInterfaceForExtModuleEnable(
USB_MODULE_ID index
);
Description
This function specifies that external module(s) are controlled via the I2C interface.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
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Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_I2CInterfaceForExtModuleEnable(MY_USB_INSTANCE);
5.6.26.6.12.3 PLIB_USB_TransceiverDisable Function
C
void PLIB_USB_TransceiverDisable(
USB_MODULE_ID index
);
Description
This function disables the on-chip transceiver and enables the interface to the off-chip transceiver.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
PIC18 devices only. This feature may not be available on all devices. Please refer to the specific device data sheet to determine
availability or use PLIB_USB_ExistsOnChipTransceiver in your application to determine whether this feature is available.
Example
PLIB_USB_TransceiverDisable(MY_USB_INSTANCE);
5.6.26.6.12.4 PLIB_USB_TransceiverEnable Function
C
void PLIB_USB_TransceiverEnable(
USB_MODULE_ID index
);
Description
This function enables the on-chip transceiver. The interface to the off-chip transceiver is disabled.
Preconditions
Use only before the USB module is enabled by calling PLIB_USB_Enable.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3266
Remarks
PIC18 devices only. This feature may not be available on all devices. Please refer to the specific device data sheet to determine
availability or use PLIB_USB_ExistsOnChipTransceiver in your application to determine whether this feature is available.
Example
PLIB_USB_TransceiverEnable(MY_USB_INSTANCE);
5.6.26.6.13 VBus Support Functions
5.6.26.6.13.1 PLIB_USB_ExternalComparatorMode2Pin Function
C
void PLIB_USB_ExternalComparatorMode2Pin(
USB_MODULE_ID index
);
Description
This function sets the 2-pin input configuration for VBUS Comparators.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_ExternalComparatorMode2Pin(MY_USB_INSTANCE);
5.6.26.6.13.2 PLIB_USB_ExternalComparatorMode3Pin Function
C
void PLIB_USB_ExternalComparatorMode3Pin(
USB_MODULE_ID index
);
Description
This function sets the 3-pin input configuration for VBUS comparators.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_ExternalComparatorMode3Pin(MY_USB_INSTANCE);
5.6.26.6.13.3 PLIB_USB_PWMCounterDisable Function
C
void PLIB_USB_PWMCounterDisable(
USB_MODULE_ID index
);
Description
This function disables the PWM counter used to generate the VBUS for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_PWMDisable(MY_USB_INSTANCE);
PLIB_USB_PWMCounterDisable(MY_USB_INSTANCE);
5.6.26.6.13.4 PLIB_USB_PWMCounterEnable Function
C
void PLIB_USB_PWMCounterEnable(
USB_MODULE_ID index
);
Description
This function enables the PWM counter used to generate the VBUS for the USB module.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3268
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_PWMEnable(MY_USB_INSTANCE);
PLIB_USB_PWMCounterEnable(MY_USB_INSTANCE);
5.6.26.6.13.5 PLIB_USB_PWMDisable Function
C
void PLIB_USB_PWMDisable(
USB_MODULE_ID index
);
Description
This function disables the PWM Generator. PWM output held in a reset state defined by PLIB_USB_PWMPolarityActiveHigh or
PLIB_USB_PWMPolarityActiveLow.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_PWMDisable (MY_USB_INSTANCE);
5.6.26.6.13.6 PLIB_USB_PWMEnable Function
C
void PLIB_USB_PWMEnable(
USB_MODULE_ID index
);
Description
This function enables the PWM Generator.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3269
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_PWMEnable(MY_USB_INSTANCE);
5.6.26.6.13.7 PLIB_USB_PWMPolaritiyActiveLow Function
C
void PLIB_USB_PWMPolaritiyActiveLow(
USB_MODULE_ID index
);
Description
This function sets the PWM output to active-high and resets low.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
5.6.26.6.13.8 PLIB_USB_PWMPolarityActiveHigh Function
C
void PLIB_USB_PWMPolarityActiveHigh(
USB_MODULE_ID index
);
Description
This function sets the PWM output to active-low and resets high.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3270
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_PWMPolaritiy (MY_USB_INSTANCE);
5.6.26.6.13.9 PLIB_USB_VBoostDisable Function
C
void PLIB_USB_VBoostDisable(
USB_MODULE_ID index
);
Description
This function disables the On-Chip 5V Boost Regulator Circuit Disabled bit.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_VBoostDisable(MY_USB_INSTANCE);
5.6.26.6.13.10 PLIB_USB_VBoostEnable Function
C
void PLIB_USB_VBoostEnable(
USB_MODULE_ID index
);
Description
This function enables the On-Chip 5V Boost Regulator Circuit Enabled bit.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3271
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_VBoostEnable(MY_USB_INSTANCE);
5.6.26.6.13.11 PLIB_USB_VBUSComparatorDisable Function
C
void PLIB_USB_VBUSComparatorDisable(
USB_MODULE_ID index
);
Description
This function disables the on-chip VBUS Comparator.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_VBUSComparatorDisable(MY_USB_INSTANCE);
5.6.26.6.13.12 PLIB_USB_VBUSComparatorEnable Function
C
void PLIB_USB_VBUSComparatorEnable(
USB_MODULE_ID index
);
Description
This function enables the on-chip VBUS Comparator.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3272
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_VBUSComparatorEnable(MY_USB_INSTANCE);
5.6.26.6.13.13 PLIB_USB_VBUSPullUpDisable Function
C
void PLIB_USB_VBUSPullUpDisable(
USB_MODULE_ID index
);
Description
This function diables the pull-up on the VBUS pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_VBUSPullUpDisable(MY_USB_INSTANCE);
5.6.26.6.13.14 PLIB_USB_VBUSPullUpEnable Function
C
void PLIB_USB_VBUSPullUpEnable(
USB_MODULE_ID index
);
Description
This function enables the pull-up on the VBUS pin.
Preconditions
None.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
available on your device.
Example
PLIB_USB_VBUSPullUpEnable(MY_USB_INSTANCE);
5.6.26.6.14 Test Support Functions
5.6.26.6.14.1 PLIB_USB_EyePatternDisable Function
C
void PLIB_USB_EyePatternDisable(
USB_MODULE_ID index
);
Description
This function disables the USB eye pattern test.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEyePattern in your application to determine whether this feature is available.
Example
PLIB_USB_EyePatternDisable(MY_USB_INSTANCE);
5.6.26.6.14.2 PLIB_USB_EyePatternEnable Function
C
void PLIB_USB_EyePatternEnable(
USB_MODULE_ID index
);
Description
This function enables the USB eye pattern test.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3274
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsEyePattern in your application to determine whether this feature is available.
Example
PLIB_USB_EyePatternEnable(MY_USB_INSTANCE);
5.6.26.6.15 Other Functions
5.6.26.6.15.1 PLIB_USB_ModuleIsBusy Function
C
bool PLIB_USB_ModuleIsBusy(
USB_MODULE_ID index
);
Description
This function indicates if the USB module is not ready to be enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
• true - USB module is active or disabled, but not ready to be enabled
• false - USB module is not active and is ready to be enabled
Remarks
This feature is not available on PIC18, PIC24, and dsPIC33 devices.
If PLIB_USB_ModuleIsBusy(MY_USB_INSTANCE) == true and the USB module is disabled, and all status returned for the
module, all enables/disables for the module will produce undefined results.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsModuleBusyin your application to determine whether this feature is available.
Example
#ifdef (__PIC32MX__)
while ( PLIB_USB_ModuleIsBusy(MY_USB_INSTANCE) )
{
// wait
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3275
}
#endif
PLIB_USB_Disable(MY_USB_INSTANCE);
5.6.26.6.15.2 PLIB_USB_PingPongFreeze Function
C
void PLIB_USB_PingPongFreeze(
USB_MODULE_ID index
);
Description
This function resets all Ping-Pong buffer pointers to even buffers.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
Buffers remain "frozen" at "Even" until they are unfrozen using PLIB_USB_PingPongUnfreeze.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsBufferFreeze in your application to determine whether this feature is available.
Example
// Reset all ping-pong buffers to "Even"
PLIB_USB_PingPongFreeze(MY_USB_INSTANCE);
PLIB_USB_PingPongUnfreeze(MY_USB_INSTANCE);
5.6.26.6.15.3 PLIB_USB_PingPongReset Function
C
void PLIB_USB_PingPongReset(
USB_MODULE_ID index
);
Description
This function resets the USB peripheral internal Ping-Pong indicator to point to Even buffers.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3276
PLIB_USB_ExistsBufferFreeze in your application to determine whether this feature is available.
Example
PLIB_USB_PingPongReset(MY_USB_INSTANCE);
5.6.26.6.15.4 PLIB_USB_PingPongUnfreeze Function
C
void PLIB_USB_PingPongUnfreeze(
USB_MODULE_ID index
);
Description
This function enables Ping-Pong buffering.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
Returns
None.
Remarks
See PLIB_USB_PingPongFreeze. This feature may not be available on all devices. Please refer to the specific device data sheet
to determine availability or use PLIB_USB_ExistsBufferFreeze in your application to determine whether this feature is available.
Example
// Reset all Ping-Pong buffers to "Even"
PLIB_USB_PingPongFreeze(MY_USB_INSTANCE);
PLIB_USB_PingPongUnfreeze(MY_USB_INSTANCE);
5.6.26.6.15.5 PLIB_USB_TokenSend Function
C
void PLIB_USB_TokenSend(
USB_MODULE_ID index,
USB_PID pidValue,
uint8_t endpoint,
uint8_t deviceAddress,
bool isLowSpeed
);
Description
This function sends the specified token to the specified endpoint and address. The token is placed on the bus at the next
available time. The token can be executed at low speed.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance of interest
pidValue PID of the token to be placed on the bus.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3277
endpoint Device endpoint to which the token should be sent.
isLowSpeed Is true if the token should be executed at low speed.
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_USB_ExistsGEN_Interrupt in your application to determine whether this feature is available.
Example
// Send an OUT token to endpoint 1 device address 2 at full speed
PLIB_USB_SendToken(MY_USB_INSTANCE, USB_PID_OUT, 1, 2, false);
5.6.26.6.16 Data Types and Constants
5.6.26.6.16.1 USB_BUFFER_DATA01 Enumeration
C
typedef enum {
USB_BUFFER_DATA0,
USB_BUFFER_DATA1
} USB_BUFFER_DATA01;
Description
USB Endpoint Buffer Data Toggle Enumeration
This data type provides enumeration data toggle for a buffer.
Members
Members Description
USB_BUFFER_DATA0 DATA0/1 = 0
USB_BUFFER_DATA1 DATA0/1 = 1
Remarks
None.
5.6.26.6.16.2 USB_BUFFER_DIRECTION Enumeration
C
typedef enum {
USB_BUFFER_RX,
USB_BUFFER_TX
} USB_BUFFER_DIRECTION;
Description
USB Endpoint Buffer Direction Enumeration
This data type provides enumeration transmit/receive direction for a buffer.
Members
Members Description
USB_BUFFER_RX Receive
USB_BUFFER_TX Transmit
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3278
Remarks
None.
5.6.26.6.16.3 USB_BUFFER_PING_PONG Enumeration
C
typedef enum {
USB_BUFFER_EVEN,
USB_BUFFER_ODD
} USB_BUFFER_PING_PONG;
Description
Enumeration of USB Buffer Ping-Pong
This data type enumerates the ping-pong buffer (Even vs. Odd).
Members
Members Description
USB_BUFFER_EVEN Even Buffer
USB_BUFFER_ODD Odd Buffer
Remarks
None.
5.6.26.6.16.4 USB_BUFFER_SCHEDULE_DATA01 Enumeration
C
typedef enum {
USB_BUFFER_DONTCHANGE,
USB_BUFFER_SET_DATA0,
USB_BUFFER_SET_DATA1
} USB_BUFFER_SCHEDULE_DATA01;
Description
USB Endpoint Buffer Data Toggle Enumeration for Buffer Schedulint
This data type provides enumeration data toggle for a buffer.
Members
Members Description
USB_BUFFER_DONTCHANGE Don't Change DATA0/1
USB_BUFFER_SET_DATA0 DATA0/1 = 0
USB_BUFFER_SET_DATA1 DATA0/1 = 1
Remarks
None.
5.6.26.6.16.5 USB_EP_TXRX Enumeration
C
typedef enum {
USB_EP_NOTXRX,
USB_EP_RX,
USB_EP_TX,
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3279
USB_EP_TX_RX
} USB_EP_TXRX;
Description
Enumeration of USB Endpoint Transmit/Receive Setup
This data type provides enumeration transmit/receive setup for an endpoint.
Members
Members Description
USB_EP_NOTXRX Nothing enabled for endpoint
USB_EP_RX Receive enabled for endpoint
USB_EP_TX Transmit enabled for endpoint
USB_EP_TX_RX Transmit and Receive enabled for endpoint
Remarks
None.
5.6.26.6.16.6 USB_OPMODES Enumeration
C
typedef enum {
USB_OPMODE_NONE,
USB_OPMODE_DEVICE,
USB_OPMODE_HOST,
USB_OPMODE_OTG
} USB_OPMODES;
Description
USB Operating Modes Enumeration
This data type provides enumeration of the operating modes supported by the USB module.
Members
Members Description
USB_OPMODE_NONE None
USB_OPMODE_DEVICE Device
USB_OPMODE_HOST Host
USB_OPMODE_OTG OTG
Remarks
PIC18 devices only support USB_OPMODE_DEVICE.
5.6.26.6.16.7 USB_OTG_INTERRUPTS Enumeration
C
typedef enum {
USB_OTG_INT_ADEVICE_VBUS_VALID,
USB_OTG_INT_OTG_RESERVED,
USB_OTG_INT_BDEVICE_SESSION_END,
USB_OTG_INT_SESSION_VALID,
USB_OTG_INT_ACTIVITY_DETECT,
USB_OTG_INT_STABLE_LINE_STATE,
USB_OTG_INT_ONE_MS_TIMEOUT,
USB_OTG_INT_ID_STATE_CHANGE,
USB_OTG_INT_ANY,
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3280
USB_OTG_INT_ALL
} USB_OTG_INTERRUPTS;
Description
USB OTG Interrupts Enumeration
This data type provides enumeration of interrupts related to the USB OTG module.
Members
Members Description
USB_OTG_INT_ADEVICE_VBUS_VALID State of (Vbus > Va_vbus_vld) on the A device has changed
USB_OTG_INT_OTG_RESERVED Reserved. Don't use.
USB_OTG_INT_BDEVICE_SESSION_END State of (Vbus < Vb_sess_end) on the B device has changed
USB_OTG_INT_SESSION_VALID State of (Vbus > Va_sess_vld) on the A or B devices has changed
USB_OTG_INT_ACTIVITY_DETECT Activity detected on the D+, D-, ID, or Vbus lines
USB_OTG_INT_STABLE_LINE_STATE USB line state has been stable for 1 ms, but different from last time
USB_OTG_INT_ONE_MS_TIMEOUT One millescond timer has expired
USB_OTG_INT_ID_STATE_CHANGE Change in state of ID pin detected.
USB_OTG_INT_ANY All or Any of the above
USB_OTG_INT_ALL All or Any of the above
Remarks
Not applicable on PIC18 devices or if the USB OTG module is not enabled.
5.6.26.6.16.8 USB_OTG_PULL_UP_PULL_DOWN Enumeration
C
typedef enum {
USB_OTG_DPLUS_PULLUP,
USB_OTG_DMINUS_PULLUP,
USB_OTG_DPLUS_PULLDN,
USB_OTG_DMINUS_PULLDN
} USB_OTG_PULL_UP_PULL_DOWN;
Description
Enumeration of Pull-Up and Pull-Down Resistors for OTG
This data type enumerates the OTG Pull-Up and Pull-Down resistors for D+ and D- .
Members
Members Description
USB_OTG_DPLUS_PULLUP D+ Pull-Up
USB_OTG_DMINUS_PULLUP D- Pull-Up
USB_OTG_DPLUS_PULLDN D+ Pull-Down
USB_OTG_DMINUS_PULLDN D- Pull-Down
Remarks
Not applicable for PIC18 devices.
5.6.26.6.16.9 USB_PID Enumeration
C
typedef enum {
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3281
USB_PID_SETUP,
USB_PID_IN,
USB_PID_OUT
} USB_PID;
Description
Enumeration of Legal Packet IDs (PIDs)
This data type enumerates the valid (i.e., legal) PID values. While the PID field is four bits long, only these values are legal and
should be used. The use of any other values may cause unpredictable results.
Members
Members Description
USB_PID_SETUP Setup token
USB_PID_IN IN token
USB_PID_OUT OUT token
5.6.26.6.16.10 USB_PING_PONG_MODE Enumeration
C
typedef enum {
USB_PING_PONG_ALL_BUT_EP0,
USB_PING_PONG_FULL_PING_PONG,
USB_PING_PONG_EP0_OUT_ONLY,
USB_PING_PONG_NO_PING_PONG
} USB_PING_PONG_MODE;
Description
Enumeration of USB Ping-Pong Modes for PIC18 and PIC24F
This data type supports the four modes of ping-pong buffering for PIC18 and PIC24F devices.
Members
Members Description
USB_PING_PONG_ALL_BUT_EP0 Ping-Pong buffering on all endpoints except Endpoint Zero
USB_PING_PONG_FULL_PING_PONG Ping-Pong buffering on all endpoints
USB_PING_PONG_EP0_OUT_ONLY Ping-Pong buffering on just Endpoint Zero transmit
USB_PING_PONG_NO_PING_PONG No ping-pong buffering
Remarks
For PIC18 and PIC24F devices only.
5.6.26.6.16.11 USB_PING_PONG_STATE Enumeration
C
typedef enum {
USB_PING_PONG_EVEN,
USB_PING_PONG_ODD
} USB_PING_PONG_STATE;
Description
Enumeration of USB Ping-Pong Indicator
This data type decodes which buffer (Even vs. Odd) was used for the last transaction.
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3282
Members
Members Description
USB_PING_PONG_EVEN Last transaction on Even Buffer
USB_PING_PONG_ODD Last transaction on Odd Buffer
Remarks
None.
5.6.26.6.16.12 USB_TOKEN_SPEED Enumeration
C
typedef enum {
USB_LOWSPEED_TOKENS,
USB_FULLSPEED_TOKENS
} USB_TOKEN_SPEED;
Description
USB Token Speeds Enumeration
This data type provides enumeration of available token speeds.
Members
Members Description
USB_LOWSPEED_TOKENS Low Speed Tokens
USB_FULLSPEED_TOKENS Full Speed Tokens
Remarks
For Host mode only.
5.6.26.6.16.13 USB_MAX_EP_NUMBER Macro
C
#define USB_MAX_EP_NUMBER 15
Description
Maximum number of endpoints
This constant defines the maximum number of endpoints supported (not including EP0). It is used in dimensioning the Buffer
Descriptor Table (BDT) array.
5.6.26.6.17 Feature Existence Functions
5.6.26.6.17.1 PLIB_USB_ExistsActivityPending Function
C
bool PLIB_USB_ExistsActivityPending(
USB_MODULE_ID index
);
Description
This function identifies whether the ActivityPending feature is available on the USB module. When this function returns true, this
function is supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3283
• PLIB_USB_ActivityPending
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ActivityPending feature is supported on the device
• false - The ActivityPending feature is not supported on the device
Remarks
None.
5.6.26.6.17.2 PLIB_USB_ExistsALL_Interrupt Function
C
bool PLIB_USB_ExistsALL_Interrupt(
USB_MODULE_ID index
);
Description
This function identifies whether the ALL_Interrupt feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_AllInterruptEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ALL_Interrupt feature is supported on the device
• false - The ALL_Interrupt feature is not supported on the device
Remarks
None.
5.6.26.6.17.3 PLIB_USB_ExistsAutomaticSuspend Function
C
bool PLIB_USB_ExistsAutomaticSuspend(
USB_MODULE_ID index
);
Description
This function identifies whether the AutomaticSuspend feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_AutoSuspendDisable
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3284
• PLIB_USB_AutoSuspendEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The AutomaticSuspend feature is supported on the device
• false - The AutomaticSuspend feature is not supported on the device
Remarks
None.
5.6.26.6.17.4 PLIB_USB_ExistsBDTBaseAddress Function
C
bool PLIB_USB_ExistsBDTBaseAddress(
USB_MODULE_ID index
);
Description
This function identifies whether the BDTBaseAddress feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_BDTBaseAddressGet
• PLIB_USB_BDTBaseAddressSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDTBaseAddress feature is supported on the device
• false - The BDTBaseAddress feature is not supported on the device
Remarks
None.
5.6.26.6.17.5 PLIB_USB_ExistsBDTFunctions Function
C
bool PLIB_USB_ExistsBDTFunctions(
USB_MODULE_ID index
);
Description
This function identifies whether the BDTFunctions feature is available on the USB module. When this function returns true, these
functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3285
• PLIB_USB_BufferAddressGet
• PLIB_USB_BufferAddressSet
• PLIB_USB_BufferByteCountGet
• PLIB_USB_BufferByteCountSet
• PLIB_USB_BufferCancelReleaseToUSB
• PLIB_USB_BufferAllCancelReleaseToUSB
• PLIB_USB_BufferClearAll
• PLIB_USB_BufferDataToggleGet
• PLIB_USB_BufferDataToggleSelect
• PLIB_USB_BufferDataToggleSyncEnable
• PLIB_USB_BufferDataToggleSyncDisable
• PLIB_USB_BufferIndexGet
• PLIB_USB_BufferPIDBitsClear
• PLIB_USB_BufferPIDGet
• PLIB_USB_BufferReleasedToSW
• PLIB_USB_BufferReleaseToUSB
• PLIB_USB_BufferSchedule
• PLIB_USB_BufferStallDisable
• PLIB_USB_BufferStallEnable
• PLIB_USB_BufferStallGet
• PLIB_USB_BufferEP0RxStatusInitialize
• PLIB_USB_BufferClearAllDTSEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BDTFunctions feature is supported on the device
• false - The BDTFunctions feature is not supported on the device
Remarks
None.
5.6.26.6.17.6 PLIB_USB_ExistsBufferFreeze Function
C
bool PLIB_USB_ExistsBufferFreeze(
USB_MODULE_ID index
);
Description
This function identifies whether the BufferFreeze feature is available on the USB module. When this function returns true, these
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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functions are supported on the device:
• PLIB_USB_PingPongFreeze
• PLIB_USB_PingPongUnfreeze
• PLIB_USB_PingPongReset
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The BufferFreeze feature is supported on the device
• false - The BufferFreeze feature is not supported on the device
Remarks
None.
5.6.26.6.17.7 PLIB_USB_ExistsDeviceAddress Function
C
bool PLIB_USB_ExistsDeviceAddress(
USB_MODULE_ID index
);
Description
This function identifies whether the DeviceAddress feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_DeviceAddressSet
• PLIB_USB_DeviceAddressGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The DeviceAddress feature is supported on the device
• false - The DeviceAddress feature is not supported on the device
Remarks
None.
5.6.26.6.17.8 PLIB_USB_ExistsEP0LowSpeedConnect Function
C
bool PLIB_USB_ExistsEP0LowSpeedConnect(
USB_MODULE_ID index
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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);
Description
This function identifies whether the EP0LowSpeedConnect feature is available on the USB module. When this function returns
true, these functions are supported on the device:
• PLIB_USB_EP0LSDirectConnectEnable
• PLIB_USB_EP0LSDirectConnectDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EP0LowSpeedConnect feature is supported on the device
• false - The EP0LowSpeedConnect feature is not supported on the device
Remarks
None.
5.6.26.6.17.9 PLIB_USB_ExistsEP0NAKRetry Function
C
bool PLIB_USB_ExistsEP0NAKRetry(
USB_MODULE_ID index
);
Description
This function identifies whether the EP0NAKRetry feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_EP0NakRetryEnable
• PLIB_USB_EP0NakRetryDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EP0NAKRetry feature is supported on the device
• false - The EP0NAKRetry feature is not supported on the device
Remarks
None.
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5.6.26.6.17.10 PLIB_USB_ExistsEPnRxEnable Function
C
bool PLIB_USB_ExistsEPnRxEnable(
USB_MODULE_ID index
);
Description
This function identifies whether the EPnRxEnableEnhanced feature is available on the USB module. When this function returns
true, these functions are supported on the device:
• PLIB_USB_EPnRxEnable
• PLIB_USB_EPnRxDisable
• PLIB_USB_EPnTxEnable
• PLIB_USB_EPnTxDisable
• PLIB_USB_EPnHandshakeEnable
• PLIB_USB_EPnHandshakeDisable
• PLIB_USB_EPnControlTransferEnable
• PLIB_USB_EPnControlTransferDisable
• PLIB_USB_EPnIsStalled
• PLIB_USB_EPnStallClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EPnRxEnableEnhanced feature is supported on the device
• false - The EPnRxEnableEnhanced feature is not supported on the device
Remarks
None.
5.6.26.6.17.11 PLIB_USB_ExistsEPnTxRx Function
C
bool PLIB_USB_ExistsEPnTxRx(
USB_MODULE_ID index
);
Description
This function identifies whether the EPnTxRx feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_EPnTxSelect
• PLIB_USB_EPnRxSelect
• PLIB_USB_EPnTxRxSelect
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EPnTxRx feature is supported on the device
• false - The EPnTxRx feature is not supported on the device
Remarks
None.
5.6.26.6.17.12 PLIB_USB_ExistsERR_Interrupt Function
C
bool PLIB_USB_ExistsERR_Interrupt(
USB_MODULE_ID index
);
Description
This function identifies whether the ERR_Interrupt feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_ErrorInterruptEnable
• PLIB_USB_ErrorInterruptDisable
• PLIB_USB_ErrorInterruptIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ERR_Interrupt feature is supported on the device
• false - The ERR_Interrupt feature is not supported on the device
Remarks
None.
5.6.26.6.17.13 PLIB_USB_ExistsERR_InterruptStatus Function
C
bool PLIB_USB_ExistsERR_InterruptStatus(
USB_MODULE_ID index
);
Description
This function identifies whether the ERR_InterruptStatus feature is available on the USB module. When this function returns true,
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3290
these functions are supported on the device:
• PLIB_USB_ErrorInterruptFlagSet
• PLIB_USB_ErrorInterruptFlagClear
• PLIB_USB_ErrorInterruptFlagGet
• PLIB_USB_ErrorInterruptFlagAllGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ERR_InterruptStatus feature is supported on the device
• false - The ERR_InterruptStatus feature is not supported on the device
Remarks
None.
5.6.26.6.17.14 PLIB_USB_ExistsEyePattern Function
C
bool PLIB_USB_ExistsEyePattern(
USB_MODULE_ID index
);
Description
This function identifies whether the EyePattern feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_EyePatternDisable
• PLIB_USB_EyePatternEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The EyePattern feature is supported on the device
• false - The EyePattern feature is not supported on the device
Remarks
None.
5.6.26.6.17.15 PLIB_USB_ExistsFrameNumber Function
C
bool PLIB_USB_ExistsFrameNumber(
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3291
USB_MODULE_ID index
);
Description
This function identifies whether the FrameNumber feature is available on the USB module. When this function returns true, this
function is supported on the device:
• PLIB_USB_FrameNumberGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The FrameNumber feature is supported on the device
• false - The FrameNumber feature is not supported on the device
Remarks
None.
5.6.26.6.17.16 PLIB_USB_ExistsGEN_Interrupt Function
C
bool PLIB_USB_ExistsGEN_Interrupt(
USB_MODULE_ID index
);
Description
This function identifies whether the GEN_Interrupt feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_InterruptEnable
• PLIB_USB_InterruptDisable
• PLIB_USB_InterruptIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The GEN_Interrupt feature is supported on the device
• false - The GEN_Interrupt feature is not supported on the device
Remarks
None.
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5.6.26.6.17.17 PLIB_USB_ExistsGEN_InterruptStatus Function
C
bool PLIB_USB_ExistsGEN_InterruptStatus(
USB_MODULE_ID index
);
Description
This function identifies whether the GEN_InterruptStatus feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_InterruptFlagSet
• PLIB_USB_InterruptFlagClear
• PLIB_USB_InterruptFlagGet
• PLIB_USB_InterruptFlagAllGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The GEN_InterruptStatus feature is supported on the device
• false - The GEN_InterruptStatus feature is not supported on the device
Remarks
None.
5.6.26.6.17.18 PLIB_USB_ExistsHostBusyWithToken Function
C
bool PLIB_USB_ExistsHostBusyWithToken(
USB_MODULE_ID index
);
Description
This function identifies whether the HostBusyWithToken feature is available on the USB module. When this function returns true,
this function is supported on the device:
• PLIB_USB_IsBusyWithToken
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The HostBusyWithToken feature is supported on the device
• false - The HostBusyWithToken feature is not supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Remarks
None.
5.6.26.6.17.19 PLIB_USB_ExistsHostGeneratesReset Function
C
bool PLIB_USB_ExistsHostGeneratesReset(
USB_MODULE_ID index
);
Description
This function identifies whether the HostGeneratesReset feature is available on the USB module. When this function returns
true, these functions are supported on the device:
• PLIB_USB_ResetSignalEnable
• PLIB_USB_ResetSignalDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The HostGeneratesReset feature is supported on the device
• false - The HostGeneratesReset feature is not supported on the device
Remarks
None.
5.6.26.6.17.20 PLIB_USB_ExistsLastDirection Function
C
bool PLIB_USB_ExistsLastDirection(
USB_MODULE_ID index
);
Description
This function identifies whether the LastDirection feature is available on the USB module. When this function returns true, this
function is supported on the device:
• PLIB_USB_LastTransactionDirectionGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LastDirection feature is supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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• false - The LastDirection feature is not supported on the device
Remarks
None.
5.6.26.6.17.21 PLIB_USB_ExistsLastEndpoint Function
C
bool PLIB_USB_ExistsLastEndpoint(
USB_MODULE_ID index
);
Description
This function identifies whether the LastEndpoint feature is available on the USB module. When this function returns true, this
function is supported on the device:
• PLIB_USB_LastTransactionEndPtGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LastEndpoint feature is supported on the device
• false - The LastEndpoint feature is not supported on the device
Remarks
None.
5.6.26.6.17.22 PLIB_USB_ExistsLastPingPong Function
C
bool PLIB_USB_ExistsLastPingPong(
USB_MODULE_ID index
);
Description
This function identifies whether the LastPingPong feature is available on the USB module. When this function returns true, this
function is supported on the device:
• PLIB_USB_LastTransactionPingPongStateGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LastPingPong feature is supported on the device
• false - The LastPingPong feature is not supported on the device
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Remarks
None.
5.6.26.6.17.23 PLIB_USB_ExistsLastTransactionDetails Function
C
bool PLIB_USB_ExistsLastTransactionDetails(
USB_MODULE_ID index
);
Description
This function identifies whether the LastTransactionDetails feature is available on the USB module. When this function returns
true, this function is supported on the device:
• PLIB_USB_LastTransactionDetailsGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LastTransactionDetails feature is supported on the device
• false - The LastTransactionDetails feature is not supported on the device
Remarks
None.
5.6.26.6.17.24 PLIB_USB_ExistsLiveJState Function
C
bool PLIB_USB_ExistsLiveJState(
USB_MODULE_ID index
);
Description
This function identifies whether the LiveJState feature is available on the USB module. When this function returns true, this
function is supported on the device:
• PLIB_USB_JStateIsActive
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LiveJState feature is supported on the device
• false - The LiveJState feature is not supported on the device
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Remarks
None.
5.6.26.6.17.25 PLIB_USB_ExistsLiveSingleEndedZero Function
C
bool PLIB_USB_ExistsLiveSingleEndedZero(
USB_MODULE_ID index
);
Description
This function identifies whether the LiveSingleEndedZero feature is available on the USB module. When this function returns
true, this function is supported on the device:
• PLIB_USB_SE0InProgress
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The LiveSingleEndedZero feature is supported on the device
• false - The LiveSingleEndedZero feature is not supported on the device
Remarks
None.
5.6.26.6.17.26 PLIB_USB_ExistsModuleBusy Function
C
bool PLIB_USB_ExistsModuleBusy(
USB_MODULE_ID index
);
Description
This function identifies whether the ModuleBusy feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_ModuleIsBusy
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ModuleBusy feature is supported on the device
• false - The ModuleBusy feature is not supported on the device
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Remarks
None.
5.6.26.6.17.27 PLIB_USB_ExistsModulePower Function
C
bool PLIB_USB_ExistsModulePower(
USB_MODULE_ID index
);
Description
This function identifies whether the ModulePower feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_Enable
• PLIB_USB_Disable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ModulePower feature is supported on the device
• false - The ModulePower feature is not supported on the device
Remarks
None.
5.6.26.6.17.28 PLIB_USB_ExistsNextTokenSpeed Function
C
bool PLIB_USB_ExistsNextTokenSpeed(
USB_MODULE_ID index
);
Description
This function identifies whether the NextTokenSpeed feature is available on the USB module. When this function returns true,
this function is supported on the device:
• PLIB_USB_TokenSpeedSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The NextTokenSpeed feature is supported on the device
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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• false - The NextTokenSpeed feature is not supported on the device
Remarks
None.
5.6.26.6.17.29 PLIB_USB_ExistsOnChipPullup Function
C
bool PLIB_USB_ExistsOnChipPullup(
USB_MODULE_ID index
);
Description
This function identifies whether the OnChipPullup feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_OnChipPullUpDisable
• PLIB_USB_OnChipPullUpEnable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OnChipPullup feature is supported on the device
• false - The OnChipPullup feature is not supported on the device
Remarks
None.
5.6.26.6.17.30 PLIB_USB_ExistsOnChipTransceiver Function
C
bool PLIB_USB_ExistsOnChipTransceiver(
USB_MODULE_ID index
);
Description
This function identifies whether the OnChipTransceiver feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_TransceiverEnable
• PLIB_USB_TransceiverDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3299
Returns
• true - The OnChipTransceiver feature is supported on the device
• false - The OnChipTransceiver feature is not supported on the device
Remarks
None.
5.6.26.6.17.31 PLIB_USB_ExistsOpModeSelect Function
C
bool PLIB_USB_ExistsOpModeSelect(
USB_MODULE_ID index
);
Description
This function identifies whether the OpModeSelect feature is available on the USB module. When this function returns true, this
function is supported on the device:
• PLIB_USB_OperatingModeSelect
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OpModeSelect feature is supported on the device
• false - The OpModeSelect feature is not supported on the device
Remarks
None.
5.6.26.6.17.32 PLIB_USB_ExistsOTG_ASessionValid Function
C
bool PLIB_USB_ExistsOTG_ASessionValid(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_ASessionValid feature is available on the USB module. When this function returns true,
this function is supported on the device:
• PLIB_USB_OTG_VBusValid
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Returns
• true - The OTG_ASessionValid feature is supported on the device
• false - The OTG_ASessionValid feature is not supported on the device
Remarks
None.
5.6.26.6.17.33 PLIB_USB_ExistsOTG_BSessionEnd Function
C
bool PLIB_USB_ExistsOTG_BSessionEnd(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_BSessionEnd feature is available on the USB module. When this function returns true,
this function is supported on the device:
• PLIB_USB_OTG_BSessionHasEnded
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OTG_BSessionEnd feature is supported on the device
• false - The OTG_BSessionEnd feature is not supported on the device
Remarks
None.
5.6.26.6.17.34 PLIB_USB_ExistsOTG_IDPinState Function
C
bool PLIB_USB_ExistsOTG_IDPinState(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_IDPinState feature is available on the USB module. When this function returns true,
this function is supported on the device:
• PLIB_USB_OTG_IDPinStateIsTypeA
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Returns
• true - The OTG_IDPinState feature is supported on the device
• false - The OTG_IDPinState feature is not supported on the device
Remarks
None.
5.6.26.6.17.35 PLIB_USB_ExistsOTG_Interrupt Function
C
bool PLIB_USB_ExistsOTG_Interrupt(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_Interrupt feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_OTG_InterruptEnable
• PLIB_USB_OTG_InterruptDisable
• PLIB_USB_OTG_InterruptIsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OTG_Interrupt feature is supported on the device
• false - The OTG_Interrupt feature is not supported on the device
Remarks
None.
5.6.26.6.17.36 PLIB_USB_ExistsOTG_InterruptStatus Function
C
bool PLIB_USB_ExistsOTG_InterruptStatus(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_InterruptStatus feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_OTG_InterruptFlagSet
• PLIB_USB_OTG_InterruptFlagClear
• PLIB_USB_OTG_InterruptFlagGet
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OTG_InterruptStatus feature is supported on the device
• false - The OTG_InterruptStatus feature is not supported on the device
Remarks
None.
5.6.26.6.17.37 PLIB_USB_ExistsOTG_LineState Function
C
bool PLIB_USB_ExistsOTG_LineState(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_LineState feature is available on the USB module. When this function returns true, this
function is supported on the device:
• PLIB_USB_OTG_LineStateIsStable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OTG_LineState feature is supported on the device
• false - The OTG_LineState feature is not supported on the device
Remarks
None.
5.6.26.6.17.38 PLIB_USB_ExistsOTG_PullUpPullDown Function
C
bool PLIB_USB_ExistsOTG_PullUpPullDown(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_PullUpPullDown feature is available on the USB module. When this function returns
true, this function is supported on the device:
• PLIB_USB_OTG_PullUpPullDownSetup
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OTG_PullUpPullDown feature is supported on the device
• false - The OTG_PullUpPullDown feature is not supported on the device
Remarks
None.
5.6.26.6.17.39 PLIB_USB_ExistsOTG_SessionValid Function
C
bool PLIB_USB_ExistsOTG_SessionValid(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_SessionValid feature is available on the USB module. When this function returns true,
this function is supported on the device:
• PLIB_USB_OTG_SessionValid
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OTG_SessionValid feature is supported on the device
• false - The OTG_SessionValid feature is not supported on the device
Remarks
None.
5.6.26.6.17.40 PLIB_USB_ExistsOTG_VbusCharge Function
C
bool PLIB_USB_ExistsOTG_VbusCharge(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_VbusCharge feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_OTG_VBusChargeEnable
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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• PLIB_USB_OTG_VBusChargeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OTG_VbusCharge feature is supported on the device
• false - The OTG_VbusCharge feature is not supported on the device
Remarks
None.
5.6.26.6.17.41 PLIB_USB_ExistsOTG_VbusDischarge Function
C
bool PLIB_USB_ExistsOTG_VbusDischarge(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_VbusDischarge feature is available on the USB module. When this function returns
true, these functions are supported on the device:
• PLIB_USB_OTG_VBusDischargeEnable
• PLIB_USB_OTG_VBusDischargeDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OTG_VbusDischarge feature is supported on the device
• false - The OTG_VbusDischarge feature is not supported on the device
Remarks
None.
5.6.26.6.17.42 PLIB_USB_ExistsOTG_VbusPowerOnOff Function
C
bool PLIB_USB_ExistsOTG_VbusPowerOnOff(
USB_MODULE_ID index
);
Description
This function identifies whether the OTG_VbusPowerOnOff feature is available on the USB module. When this function returns
true, these functions are supported on the device:
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
5-3305
• PLIB_USB_OTG_VBusPowerOff
• PLIB_USB_OTG_VBusPowerOn
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The OTG_VbusPowerOnOff feature is supported on the device
• false - The OTG_VbusPowerOnOff feature is not supported on the device
Remarks
None.
5.6.26.6.17.43 PLIB_USB_ExistsPacketTransfer Function
C
bool PLIB_USB_ExistsPacketTransfer(
USB_MODULE_ID index
);
Description
This function identifies whether the PacketTransfer feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_PacketTransferIsDisabled
• PLIB_USB_PacketTransferEnable
• PLIB_USB_PacketTransferDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PacketTransfer feature is supported on the device
• false - The PacketTransfer feature is not supported on the device
Remarks
None.
5.6.26.6.17.44 PLIB_USB_ExistsPingPongMode Function
C
bool PLIB_USB_ExistsPingPongMode(
USB_MODULE_ID index
);
5.6 Peripheral Library Help MPLAB Harmony Help USB Peripheral Library
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Description
This function identifies whether the PingPongMode feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_PingPongModeSelect
• PLIB_USB_PingPongModeGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PingPongMode feature is supported on the device
• false - The PingPongMode feature is not supported on the device
Remarks
None.
5.6.26.6.17.45 PLIB_USB_ExistsResumeSignaling Function
C
bool PLIB_USB_ExistsResumeSignaling(
USB_MODULE_ID index
);
Description
This function identifies whether the ResumeSignaling feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_ResumeSignalingEnable
• PLIB_USB_ResumeSignalingDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The ResumeSignaling feature is supported on the device
• false - The ResumeSignaling feature is not supported on the device
Remarks
None.
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5.6.26.6.17.46 PLIB_USB_ExistsSleepEntryGuard Function
C
bool PLIB_USB_ExistsSleepEntryGuard(
USB_MODULE_ID index
);
Description
This function identifies whether the SleepEntryGuard feature is available on the USB module. When this function returns true,
these functions are supported on the device:
• PLIB_USB_SleepGuardEnable
• PLIB_USB_SleepGuardDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SleepEntryGuard feature is supported on the device
• false - The SleepEntryGuard feature is not supported on the device
Remarks
None.
5.6.26.6.17.47 PLIB_USB_ExistsSOFThreshold Function
C
bool PLIB_USB_ExistsSOFThreshold(
USB_MODULE_ID index
);
Description
This function identifies whether the SOFThreshold feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_SOFThresholdGet
• PLIB_USB_SOFThresholdSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SOFThreshold feature is supported on the device
• false - The SOFThreshold feature is not supported on the device
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Remarks
None.
5.6.26.6.17.48 PLIB_USB_ExistsSpeedControl Function
C
bool PLIB_USB_ExistsSpeedControl(
USB_MODULE_ID index
);
Description
This function identifies whether the SpeedControl feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_FullSpeedEnable
• PLIB_USB_FullSpeedDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The SpeedControl feature is supported on the device
• false - The SpeedControl feature is not supported on the device
Remarks
None.
5.6.26.6.17.49 PLIB_USB_ExistsStartOfFrames Function
C
bool PLIB_USB_ExistsStartOfFrames(
USB_MODULE_ID index
);
Description
This function identifies whether the StartOfFrames feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_SOFEnable
• PLIB_USB_SOFDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
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Returns
• true - The StartOfFrames feature is supported on the device
• false - The StartOfFrames feature is not supported on the device
Remarks
None.
5.6.26.6.17.50 PLIB_USB_ExistsStopInIdle Function
C
bool PLIB_USB_ExistsStopInIdle(
USB_MODULE_ID index
);
Description
This function identifies whether the StopInIdle feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_StopInIdleEnable
• PLIB_USB_StopInIdleDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The StopInIdle feature is supported on the device
• false - The StopInIdle feature is not supported on the device
Remarks
None.
5.6.26.6.17.51 PLIB_USB_ExistsSuspend Function
C
bool PLIB_USB_ExistsSuspend(
USB_MODULE_ID index
);
Description
This function identifies whether the Suspend feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_SuspendEnable
• PLIB_USB_SuspendDisable
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The Suspend feature is supported on the device
• false - The Suspend feature is not supported on the device
Remarks
None.
5.6.26.6.17.52 PLIB_USB_ExistsTokenEP Function
C
bool PLIB_USB_ExistsTokenEP(
USB_MODULE_ID index
);
Description
This function identifies whether the TokenEP feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_TokenEPGet
• PLIB_USB_TokenEPSet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TokenEP feature is supported on the device
• false - The TokenEP feature is not supported on the device
Remarks
None.
5.6.26.6.17.53 PLIB_USB_ExistsTokenPID Function
C
bool PLIB_USB_ExistsTokenPID(
USB_MODULE_ID index
);
Description
This function identifies whether the TokenPID feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_TokenPIDGet
• PLIB_USB_TokenPIDSet
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TokenPID feature is supported on the device
• false - The TokenPID feature is not supported on the device
Remarks
None.
5.6.26.6.17.54 PLIB_USB_ExistsUOEMonitor Function
C
bool PLIB_USB_ExistsUOEMonitor(
USB_MODULE_ID index
);
Description
This function identifies whether the UOEMonitor feature is available on the USB module. When this function returns true, these
functions are supported on the device:
• PLIB_USB_UOEMonitorEnable
• PLIB_USB_UOEMonitorDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The UOEMonitor feature is supported on the device
• false - The UOEMonitor feature is not supported on the device
Remarks
None.
5.6.26.7 Files
Files
Name Description
plib_usb.h USB PLIB Interface Header for common definitions
Description
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5.6.26.7.1 plib_usb.h
USB Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
USB Peripheral Library.
Enumerations
Name Description
USB_BUFFER_DATA01 Provides enumeration data toggle for a buffer.
USB_BUFFER_DIRECTION Provides enumeration transmit/receive direction for a buffer.
USB_BUFFER_PING_PONG Enumerates the ping-pong buffer (Even vs. Odd).
USB_BUFFER_SCHEDULE_DATA01 Provides enumeration data toggle for a buffer.
USB_EP_TXRX Provides enumeration transmit/receive setup for an endpoint.
USB_OPMODES Provides enumeration of operating modes supported by USB.
USB_OTG_INTERRUPTS Provides enumeration of interrupts related to the USB On-The-Go (OTG)
module.
USB_OTG_PULL_UP_PULL_DOWN USB OTG pull-Up and pull-Down resistors for D+ and D- .
USB_PID Legal PID values.
USB_PING_PONG_MODE Supports the four modes of ping-pong buffering for PIC18 and PIC24F
devices.
USB_PING_PONG_STATE Decodes which buffer (Even vs. Odd) was used for the last transaction.
USB_TOKEN_SPEED Provides enumeration of available token speeds.
Functions
Name Description
PLIB_USB_ActivityPending Returns whether or not USB activity is pending.
PLIB_USB_AllInterruptEnable Configures the USB peripheral general interrupts, error interrupts
and OTG interrupts.
PLIB_USB_AutoSuspendDisable Disables USB OTG Auto-suspend mode.
PLIB_USB_AutoSuspendEnable Enables USB Auto-suspend mode.
PLIB_USB_BDTBaseAddressGet Returns the base address of the Buffer Descriptor Table.
PLIB_USB_BDTBaseAddressSet Sets the base address for the Buffer Descriptor Table for PIC24
and PIC32 devices.
PLIB_USB_BufferAddressGet Gets the memory address of an endpoint buffer.
PLIB_USB_BufferAddressSet Sets the endpoint buffer address.
PLIB_USB_BufferAllCancelReleaseToUSB Cancels all endpoint buffer releases to the USB module and hands
over the buffer to the CPU.
PLIB_USB_BufferByteCountGet Returns the endpoint buffer byte count.
PLIB_USB_BufferByteCountSet Sets the buffer byte count.
PLIB_USB_BufferCancelReleaseToUSB Cancels release of the endpoint buffer by software, allowing
software to again access the buffer.
PLIB_USB_BufferClearAll Clears (zeros out) entries in the Buffer Descriptor Table.
PLIB_USB_BufferClearAllDTSEnable Clears the endpoint descriptor entry and enables data toggle
synchronization.
PLIB_USB_BufferDataToggleGet Returns data synchronization (DATA0 or DATA1) for the endpoint
buffer.
PLIB_USB_BufferDataToggleSelect Sets the endpoint buffer to DATA0 or DATA1.
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PLIB_USB_BufferDataToggleSyncDisable Disables DATA0/DATA1 synchronization between the device and
host.
PLIB_USB_BufferDataToggleSyncEnable Enables DATA0/DATA1 synchronization between the device and
host.
PLIB_USB_BufferEP0RxStatusInitialize Initializes the Endpoint 0 RX endpoint buffer descriptors.
PLIB_USB_BufferIndexGet Gets the Buffer Descriptor Table index for a buffer.
PLIB_USB_BufferPIDBitsClear Clears the Buffer Status bits in the Buffer Descriptor Table.
PLIB_USB_BufferPIDGet Returns the token packet ID (PID) from the endpoint buffer status.
PLIB_USB_BufferReleasedToSW Returns the boolean flag value of 'true' when the buffer has been
released by the USB module.
PLIB_USB_BufferReleaseToUSB Releases the endpoint buffer by software, allowing the USB
module access to the buffer.
PLIB_USB_BufferSchedule Hands over a buffer to the USB module along with the buffer
address and byte count.
PLIB_USB_BufferStallDisable Disables STALL handshaking for the associated endpoint buffer.
PLIB_USB_BufferStallEnable Enables STALL handshaking for the associated endpoint buffer.
PLIB_USB_BufferStallGet Returns the buffer stall status for an endpoint/direction/ping-pong.
PLIB_USB_DeviceAddressGet Returns the address of the USB module in Device mode.
PLIB_USB_DeviceAddressSet Sets the USB Device's address.
PLIB_USB_Disable Disables (powers down) the USB module.
PLIB_USB_Enable Enables (powers up) the USB module.
PLIB_USB_EP0HostSetup Sends token to the specified address.
PLIB_USB_EP0LSDirectConnectDisable Disables direct connection to a low-speed device for Endpoint 0.
PLIB_USB_EP0LSDirectConnectEnable Enables direct connection to a low-speed device for Endpoint 0.
PLIB_USB_EP0NakRetryDisable Disables retrying of NAKed transactions.
PLIB_USB_EP0NakRetryEnable Enables retrying NAK'd transactions for Endpoint 0.
PLIB_USB_EPnAttributesClear Clears the set attributes of the specified endpoint.
PLIB_USB_EPnAttributesSet Configures attributes of the endpoint such as direction, handshake
capability and direction.
PLIB_USB_EPnControlTransferDisable Disables endpoint control transfers.
PLIB_USB_EPnControlTransferEnable Enables endpoint control transfers.
PLIB_USB_EPnDirectionDisable Disables the specified endpoint direction.
PLIB_USB_EPnHandshakeDisable Disables endpoint handshaking.
PLIB_USB_EPnHandshakeEnable Enables endpoint handshaking.
PLIB_USB_EPnIsStalled Tests whether the endpoint epValue is stalled.
PLIB_USB_EPnRxDisable Disables an endpoint's abililty to process IN tokens.
PLIB_USB_EPnRxEnable Enables an endpoint to process IN tokens.
PLIB_USB_EPnRxSelect Selects receive capabilities of an endpoint.
PLIB_USB_EPnStallClear Clears an endpoint's stalled flag.
PLIB_USB_EPnTxDisable Disables an endpoint's ability to process OUT tokens.
PLIB_USB_EPnTxEnable Enables an endpoint to process OUT tokens.
PLIB_USB_EPnTxRxSelect Selects transmit and/or receive capabilities of an endpoint.
PLIB_USB_EPnTxSelect Selects transmit capabilities of an endpoint.
PLIB_USB_ErrorInterruptDisable Disables an error interrupt for the USB module.
PLIB_USB_ErrorInterruptEnable Enables an error interrupt for the USB module.
PLIB_USB_ErrorInterruptFlagAllGet Returns a logically ORed bit map of active error interrupt flags.
PLIB_USB_ErrorInterruptFlagClear Clears an error interrupt flag for the USB module.
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PLIB_USB_ErrorInterruptFlagGet Tests an error interrupt flag for the USB module.
PLIB_USB_ErrorInterruptFlagSet Sets an error interrupt flag for the USB module.
PLIB_USB_ErrorInterruptIsEnabled Returns true if interrupts are enabled.
PLIB_USB_ExistsActivityPending Identifies whether the ActivityPending feature exists on the USB
module.
PLIB_USB_ExistsALL_Interrupt Identifies whether the ALL_Interrupt feature exists on the USB
module.
PLIB_USB_ExistsAutomaticSuspend Identifies whether the AutomaticSuspend feature exists on the
USB module.
PLIB_USB_ExistsBDTBaseAddress Identifies whether the BDTBaseAddress feature exists on the USB
module.
PLIB_USB_ExistsBDTFunctions Identifies whether the BDTFunctions feature exists on the USB
module.
PLIB_USB_ExistsBufferFreeze Identifies whether the BufferFreeze feature exists on the USB
module.
PLIB_USB_ExistsDeviceAddress Identifies whether the DeviceAddress feature exists on the USB
module.
PLIB_USB_ExistsEP0LowSpeedConnect Identifies whether the EP0LowSpeedConnect feature exists on the
USB module.
PLIB_USB_ExistsEP0NAKRetry Identifies whether the EP0NAKRetry feature exists on the USB
module.
PLIB_USB_ExistsEPnRxEnable Identifies whether the EPnRxEnableEnhanced feature exists on
the USB module.
PLIB_USB_ExistsEPnTxRx Identifies whether the EPnTxRx feature exists on the USB module.
PLIB_USB_ExistsERR_Interrupt Identifies whether the ERR_Interrupt feature exists on the USB
module.
PLIB_USB_ExistsERR_InterruptStatus Identifies whether the ERR_InterruptStatus feature exists on the
USB module.
PLIB_USB_ExistsEyePattern Identifies whether the EyePattern feature exists on the USB
module.
PLIB_USB_ExistsFrameNumber Identifies whether the FrameNumber feature exists on the USB
module.
PLIB_USB_ExistsGEN_Interrupt Identifies whether the GEN_Interrupt feature exists on the USB
module.
PLIB_USB_ExistsGEN_InterruptStatus Identifies whether the GEN_InterruptStatus feature exists on the
USB module.
PLIB_USB_ExistsHostBusyWithToken Identifies whether the HostBusyWithToken feature exists on the
USB module.
PLIB_USB_ExistsHostGeneratesReset Identifies whether the HostGeneratesReset feature exists on the
USB module.
PLIB_USB_ExistsLastDirection Identifies whether the LastDirection feature exists on the USB
module.
PLIB_USB_ExistsLastEndpoint Identifies whether the LastEndpoint feature exists on the USB
module.
PLIB_USB_ExistsLastPingPong Identifies whether the LastPingPong feature exists on the USB
module.
PLIB_USB_ExistsLastTransactionDetails Identifies whether the LastTransactionDetails feature exists on the
USB module.
PLIB_USB_ExistsLiveJState Identifies whether the LiveJState feature exists on the USB module.
PLIB_USB_ExistsLiveSingleEndedZero Identifies whether the LiveSingleEndedZero feature exists on the
USB module.
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PLIB_USB_ExistsModuleBusy Identifies whether the ModuleBusy feature exists on the USB
module.
PLIB_USB_ExistsModulePower Identifies whether the ModulePower feature exists on the USB
module.
PLIB_USB_ExistsNextTokenSpeed Identifies whether the NextTokenSpeed feature exists on the USB
module.
PLIB_USB_ExistsOnChipPullup Identifies whether the OnChipPullup feature exists on the USB
module.
PLIB_USB_ExistsOnChipTransceiver Identifies whether the OnChipTransceiver feature exists on the
USB module.
PLIB_USB_ExistsOpModeSelect Identifies whether the OpModeSelect feature exists on the USB
module.
PLIB_USB_ExistsOTG_ASessionValid Identifies whether the OTG_ASessionValid feature exists on the
USB module.
PLIB_USB_ExistsOTG_BSessionEnd Identifies whether the OTG_BSessionEnd feature exists on the
USB module.
PLIB_USB_ExistsOTG_IDPinState Identifies whether the OTG_IDPinState feature exists on the USB
module.
PLIB_USB_ExistsOTG_Interrupt Identifies whether the OTG_Interrupt feature exists on the USB
module.
PLIB_USB_ExistsOTG_InterruptStatus Identifies whether the OTG_InterruptStatus feature exists on the
USB module.
PLIB_USB_ExistsOTG_LineState Identifies whether the OTG_LineState feature exists on the USB
module.
PLIB_USB_ExistsOTG_PullUpPullDown Identifies whether the OTG_PullUpPullDown feature exists on the
USB module.
PLIB_USB_ExistsOTG_SessionValid Identifies whether the OTG_SessionValid feature exists on the
USB module.
PLIB_USB_ExistsOTG_VbusCharge Identifies whether the OTG_VbusCharge feature exists on the USB
module.
PLIB_USB_ExistsOTG_VbusDischarge Identifies whether the OTG_VbusDischarge feature exists on the
USB module.
PLIB_USB_ExistsOTG_VbusPowerOnOff Identifies whether the OTG_VbusPowerOnOff feature exists on the
USB module.
PLIB_USB_ExistsPacketTransfer Identifies whether the PacketTransfer feature exists on the USB
module.
PLIB_USB_ExistsPingPongMode Identifies whether the PingPongMode feature exists on the USB
module.
PLIB_USB_ExistsResumeSignaling Identifies whether the ResumeSignaling feature exists on the USB
module.
PLIB_USB_ExistsSleepEntryGuard Identifies whether the SleepEntryGuard feature exists on the USB
module.
PLIB_USB_ExistsSOFThreshold Identifies whether the SOFThreshold feature exists on the USB
module.
PLIB_USB_ExistsSpeedControl Identifies whether the SpeedControl feature exists on the USB
module.
PLIB_USB_ExistsStartOfFrames Identifies whether the StartOfFrames feature exists on the USB
module.
PLIB_USB_ExistsStopInIdle Identifies whether the StopInIdle feature exists on the USB module.
PLIB_USB_ExistsSuspend Identifies whether the Suspend feature exists on the USB module.
PLIB_USB_ExistsTokenEP Identifies whether the TokenEP feature exists on the USB module.
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PLIB_USB_ExistsTokenPID Identifies whether the TokenPID feature exists on the USB module.
PLIB_USB_ExistsUOEMonitor Identifies whether the UOEMonitor feature exists on the USB
module.
PLIB_USB_ExternalComparatorMode2Pin Sets the 2-pin input configuration for VBUS comparators.
PLIB_USB_ExternalComparatorMode3Pin Sets the 3-pin input configuration for VBUS Comparators.
PLIB_USB_EyePatternDisable Disables the USB eye pattern test.
PLIB_USB_EyePatternEnable Enables USB eye pattern test.
PLIB_USB_FrameNumberGet Returns the USB frame number.
PLIB_USB_FullSpeedDisable Forces the USB module to operate at low speed.
PLIB_USB_FullSpeedEnable Enables the USB to operate at full speed.
PLIB_USB_I2CInterfaceForExtModuleDisable Specifies external module(s) are controlled via dedicated pins.
PLIB_USB_I2CInterfaceForExtModuleEnable Specifies external module(s) are controlled via the I2C interface.
PLIB_USB_InterruptDisable Disables a general interrupt for the USB module.
PLIB_USB_InterruptEnable Enables a general interrupt for the USB module.
PLIB_USB_InterruptEnableGet Returns the enable/disable status of general USB module interrupts
PLIB_USB_InterruptFlagAllGet Returns a logically ORed bit map of active general USB interrupt
flags.
PLIB_USB_InterruptFlagClear Clears a general interrupt flag for the USB module.
PLIB_USB_InterruptFlagGet Tests a general interrupt flag for the USB module.
PLIB_USB_InterruptFlagSet Sets a general interrupt flag for the USB module.
PLIB_USB_InterruptIsEnabled Returns true if interrupts are enabled.
PLIB_USB_IsBusyWithToken Indicates whether there is a token being executed by the USB
module as Host.
PLIB_USB_JStateIsActive Live differential receiver J State flag.
PLIB_USB_LastTransactionDetailsGet Returns the details of the last completed transaction.
PLIB_USB_LastTransactionDirectionGet Indicates the direction of the last transaction.
PLIB_USB_LastTransactionEndPtGet Returns the endpoint number of the last USB transfer.
PLIB_USB_LastTransactionPingPongStateGet Indicates whether the last transaction was to an EVEN buffer or an
ODD buffer.
PLIB_USB_ModuleIsBusy Indicates if the USB module is not ready to be enabled.
PLIB_USB_OnChipPullUpDisable Disables on-chip pull-ups.
PLIB_USB_OnChipPullUpEnable Enables on-chip pull-ups.
PLIB_USB_OperatingModeSelect Selects the operating mode of the USB module.
PLIB_USB_OTG_BSessionHasEnded Returns the status of the B-Session End Indicator bit.
PLIB_USB_OTG_IDPinStateIsTypeA Returns the ID Pin state.
PLIB_USB_OTG_InterruptDisable Disables a USB On-The-Go (OTG) Interrupt for the USB module.
PLIB_USB_OTG_InterruptEnable Enables a USB On-The-Go (OTG) Interrupt for the USB module.
PLIB_USB_OTG_InterruptFlagClear Clears a USB On-The-Go (OTG) Interrupt flag for the USB module.
PLIB_USB_OTG_InterruptFlagGet Tests a USB On-The-Go (OTG) Interrupt flag for the USB module.
PLIB_USB_OTG_InterruptFlagSet Sets a USB On-The-Go (OTG) Interrupt flag for the USB module.
PLIB_USB_OTG_InterruptIsEnabled Returns whether or not interrupts are enabled.
PLIB_USB_OTG_LineStateIsStable Returns the status of the Line Stable Indicator bit.
PLIB_USB_OTG_PullUpPullDownSetup Enables or disables pull-up and pull-down resistors.
PLIB_USB_OTG_SessionValid Returns the status of the Session Valid Indicator bit.
PLIB_USB_OTG_VBusChargeDisable Disables VBUS line charge.
PLIB_USB_OTG_VBusChargeEnable Enables the VBUS line to be charged through a pull-up resistor.
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PLIB_USB_OTG_VBusChargeTo3V Sets the VBUS line to charge to 3.3V.
PLIB_USB_OTG_VBusChargeTo5V Sets the VBUS line to charge to 5V.
PLIB_USB_OTG_VBusDischargeDisable Disables VBUS line discharge.
PLIB_USB_OTG_VBusDischargeEnable Enables VBUS line to be discharged through a resistor.
PLIB_USB_OTG_VBusPowerOff Turns off power on the VBUS Line.
PLIB_USB_OTG_VBusPowerOn Turns on power for the VBUS line.
PLIB_USB_OTG_VBusValid Returns the status of the A-VBUS valid indicator.
PLIB_USB_PacketTransferDisable Disables the Serial Interface Engine (SIE).
PLIB_USB_PacketTransferEnable Re-enables the Serial Interface Engine (SIE), allowing token and
packet processing.
PLIB_USB_PacketTransferIsDisabled Indicates that a setup token has been received from the Host and
that token/packet processing is disabled.
PLIB_USB_PingPongFreeze Resets all Ping-Pong buffer pointers to even buffers.
PLIB_USB_PingPongModeGet Returns the Ping-Pong Configuration setting.
PLIB_USB_PingPongModeSelect Selects the Ping-Pong Configuration setting.
PLIB_USB_PingPongReset Resets the USB peripheral internal Ping-Pong indicator to point to
even buffers.
PLIB_USB_PingPongUnfreeze Enables Ping-Pong buffering.
PLIB_USB_PWMCounterDisable Disables the PWM counter used to generate the VBUS for the
USB module.
PLIB_USB_PWMCounterEnable Enables the PWM counter used to generate the VBUS for the USB
module.
PLIB_USB_PWMDisable Disables the PWM Generator.
PLIB_USB_PWMEnable Enables the PWM Generator.
PLIB_USB_PWMPolaritiyActiveLow Sets the PWM output to active-high and resets low.
PLIB_USB_PWMPolarityActiveHigh Sets the PWM output to active-low and resets high.
PLIB_USB_ResetSignalDisable Disables reset signalling on the USB bus.
PLIB_USB_ResetSignalEnable Enables reset signalling on the USB bus.
PLIB_USB_ResumeSignalingDisable Disables resume signaling.
PLIB_USB_ResumeSignalingEnable Enables resume signaling.
PLIB_USB_SE0InProgress Returns whether a single-ended zero event is in progress.
PLIB_USB_SleepGuardDisable This function disables Sleep Guard. Entry into Sleep mode is
immediate.
PLIB_USB_SleepGuardEnable Entry into Sleep mode is blocked if bus activity is detected or if an
interrupt is pending.
PLIB_USB_SOFDisable Disables the automatic generation of the SOF token.
PLIB_USB_SOFEnable Enables the automatic generation of the SOF token every 1 ms.
PLIB_USB_SOFThresholdGet Returns the Start-of-Frame (SOF) Count bits.
PLIB_USB_SOFThresholdSet Sets the Start-of-Frame (SOF) threshold value.
PLIB_USB_StopInIdleDisable Allows the USB module to continue operation when the device
enters Idle mode.
PLIB_USB_StopInIdleEnable Enables USB module operation to stop when the device enters Idle
mode.
PLIB_USB_SuspendDisable Disables USB OTG Suspend mode.
PLIB_USB_SuspendEnable Enables USB Suspend mode.
PLIB_USB_TokenEPGet Returns the specified Endpoint address.
PLIB_USB_TokenEPSet Sets the Endpoint address for a host transaction.
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PLIB_USB_TokenPIDGet Returns the token transaction type.
PLIB_USB_TokenPIDSet Sets the token transaction type to pidValue.
PLIB_USB_TokenSend Sends token to the specified address.
PLIB_USB_TokenSpeedSelect Selects low speed or full speed for subsequent token executions.
PLIB_USB_TransceiverDisable Disables the on-chip transceiver
PLIB_USB_TransceiverEnable Enables the on-chip transceiver.
PLIB_USB_UOEMonitorDisable Disables the OE signal output.
PLIB_USB_UOEMonitorEnable Enables the OE signal output.
PLIB_USB_VBoostDisable Disables the On-Chip 5V Boost Regulator Circuit Disabled bit.
PLIB_USB_VBoostEnable Enables the On-Chip 5V Boost Regulator Circuit Enabled bit.
PLIB_USB_VBUSComparatorDisable Disables the on-chip VBUS Comparator.
PLIB_USB_VBUSComparatorEnable Enables the on-chip VBUS Comparator.
PLIB_USB_VBUSPullUpDisable Disables the pull-up on the VBUS pin.
PLIB_USB_VBUSPullUpEnable Enables the pull-up on the VBUS pin.
Macros
Name Description
USB_MAX_EP_NUMBER Maximum number of endpoints supported (not including EP0).
File Name
plib_usb.h
Company
Microchip Technology Inc.
5.6.27 Watchdog Timer Peripheral Library
5.6.27.1 Introduction
Watchdog Timer (WDT) Peripheral Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the WDT Peripheral Library that is available on the Microchip family of
microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module without the
necessity of interacting directly with the module's registers, there by abstracting differences from one microcontroller variant to
another.
5.6 Peripheral Library Help MPLAB Harmony Help Watchdog Timer Peripheral Library
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Description
The primary function of the Watchdog Timer (WDT) is to reset the microcontroller, in the event of a software malfunction, by
resetting the device if it has not been cleared by software. To ensure that application doesn't hang, the application is supposed to
reset the timer periodically. It can also be used to wake the device from Sleep or Idle mode. The WDT is a free-running timer,
which uses the Low-Power RC (LPRC) Oscillator and requires no external components. Therefore, the WDT will continue to
operate even if the system’s primary clock source is stopped.
5.6.27.2 Release Notes
MPLAB Harmony Version: v0.70b Watchdog Timer Peripheral Library Version : 0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.6.27.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
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5.6.27.4 How the Library Works
This section describes how the WDT Peripheral Library works.
Description
Initializing the WDT module involves these processes.
• Selecting the postscaler
• Enabling the WDT using PLIB_WDT_Enable
• Selecting the window size if the application wants the WDT in Windowed mode using PLIB_WDT_WindowEnable
Note: Selecting the postscaler and window size should be done through the Configuration bits
The application should periodically clear the timer once it is enabled; otherwise, a time-out will lead to a device Reset. Use
PLIB_WDT_TimerClear to clear the WDT. A timer clear before a time-out may also lead to a reset in Windowed mode. The user
application can clear the window only in the allowed window. Refer to the specific device data sheet to determine the allowed
window period for your device.
Example
/**************************************************************
* This code fragment assumes the WDT is not enabled through *
* device configuration bits. The Postscaler value must be set *
* through the device configuration and window size should be *
* set if applicable *
**************************************************/
/* Initializing the watchdog involves */
PLIB_WDT_Enable(WDT_ID_0);
//Application loop
while(1)
{
PLIB_WDT_TimerClear(WDT_ID_0);
//user code
}
Note: Refer to the specific device data sheet for information on the allowed window periods for your device and other
Configuration bit settings.
5.6.27.4.1 Using the Library
This topic describes the basic architecture of the WDT Peripheral Library and provides information and examples on how to use
it.
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Interface Header File: plib_wdt.h
The interface to the WDT Peripheral Library is defined in the "plib_wdt.h" header file. Any C language source (.c) file that uses
the WDT Peripheral Library should include "peripheral.h".
Library File:
The WDT Peripheral Library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the library interacts with the framework.
5.6.27.4.1.1 Hardware Abstraction Model
This library provides the low-level abstraction of the Watchdog timer module on the Microchip family of microcontrollers with a
convenient C language interface. This topic describes how that abstraction is modeled in the software and introduces the library
interface.
Note: The interface provided is a superset of all of the functionality of the available Watchdog Timer modules on the device.
Refer to the specific device data sheet or related family reference manual section to determine the set of functions that are
supported for each Watchdog Timer module on your device.
Description
Watchdog Timer Software Abstraction Block Diagram
The WDT uses the internal Low-Power RC (LPRC) Oscillator as the clock source. The clock is divided by the configured
prescaler value. There may be one more postscaler divisors. The divided clock is then used to increment a counter. The WDT
module uses the watchdog register as a timer. If there is no reset signal from the software and if the counter overflows, this
results in a reset in normal mode. In the case of Sleep or Idle mode, the overflow will result in a device wake-up.
For Windowed mode, resetting the counter when the count is not in the specified window will also lead to a reset. If the device is
in Sleep or Idle mode, the reset signal will be used to wake-up the device.
5.6.27.4.1.2 Library Overview
Library Interface Section Description
General Configuration Functions This includes module enable, module disable, watchdog timer window
enable, watchdog timer window disable and the timer reset routines.
General Status Functions Status routines for the WDT.
5.6.27.5 Configuring the Library
The library is configured for the supported processor when the processor is chosen in the MPLAB IDE.
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5.6.27.6 Library Interface
Data Types and Constants
Name Description
WDT_MODULE_ID Identifies the supported WDT modules.
Feature Existence Functions
Name Description
PLIB_WDT_ExistsEnableControl Identifies whether the EnableControl feature exists on the WDT module.
PLIB_WDT_ExistsPostscalarValue Identifies whether the PostscalarValue feature exists on the WDT module.
PLIB_WDT_ExistsTimerClear Identifies whether the TimerClear feature exists on the WDT module.
PLIB_WDT_ExistsWindowEnable Identifies whether the WindowEnable feature exists on the WDT module.
General Configuration Functions
Name Description
PLIB_WDT_Disable Disables the WDT module.
PLIB_WDT_Enable Enables the WDT module.
PLIB_WDT_WindowDisable Disables the WDT Windowed mode.
PLIB_WDT_WindowEnable Enables the WDT Window mode.
PLIB_WDT_TimerClear Resets the WDT module.
General Status Functions
Name Description
PLIB_WDT_IsEnabled Returns the watchdog timer on/off(enable/disable) status.
PLIB_WDT_PostscalarValueGet Returns the WDT postscalar value.
Description
This section describes the functions, data types, and constants available in the WDT Peripheral Library.
5.6.27.6.1 General Configuration Functions
5.6.27.6.1.1 PLIB_WDT_Disable Function
C
void PLIB_WDT_Disable(
WDT_MODULE_ID index
);
Description
This function disables the WDT module if it is enabled in software.
Preconditions
The WDT module must be enabled through software.
Parameters
Parameters Description
index Identifies the desired WDT module
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Returns
None.
Remarks
This function will not disable the WDT module if it is enabled through its Configuration bits.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_WDT_ExistsEnableControl in your application to determine whether this feature is available.
Example
PLIB_WDT_Disable ( WDT_ID_0 );
5.6.27.6.1.2 PLIB_WDT_Enable Function
C
void PLIB_WDT_Enable(
WDT_MODULE_ID index
);
Description
This function enables the WDT module. If it is already enabled through the Configuration bits, it will keep it enabled.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired WDT module
Returns
None.
Remarks
Calling this function is not necessary if it is enabled through its Configuration bits.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_WDT_ExistsEnableControl in your application to determine whether this feature is available.
Example
PLIB_WDT_Enable ( WDT_ID_0 );
5.6.27.6.1.3 PLIB_WDT_WindowDisable Function
C
void PLIB_WDT_WindowDisable(
WDT_MODULE_ID index
);
Description
This function disables the WDT Windowed mode.
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired WDT module
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_WDT_ExistsWindowEnable in your application to determine whether this feature is available.
Example
PLIB_WDT_WindowDisable ( WDT_ID_0 );
5.6.27.6.1.4 PLIB_WDT_WindowEnable Function
C
void PLIB_WDT_WindowEnable(
WDT_MODULE_ID index
);
Description
This function enables the WDT Windowed mode.
Preconditions
The window size must be set through the Configuration bits.
Parameters
Parameters Description
index Identifies the desired WDT module
Returns
None.
Remarks
The window size must be set through the Configuration bits.
The example code doesn't include the settings that should be done through the Configuration bits.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_WDT_ExistsWindowEnable in your application to determine whether this feature is available.
Example
PLIB_WDT_WindowEnable ( WDT_ID_0 );
PLIB_WDT_Enable ( WDT_ID_0 );
5.6.27.6.1.5 PLIB_WDT_TimerClear Function
C
void PLIB_WDT_TimerClear(
WDT_MODULE_ID index
);
Description
This function resets the WDT module. The WDT module should be cleared periodically before the count crosses and forces the
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device to reset.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired WDT module
Returns
None.
Remarks
Resetting the device before the count reaches the window will cause a reset in Windowed mode.
The example code doesn't include the settings that should be done through the Configuration bits.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_WDT_ExistsTimerClear in your application to determine whether this feature is available.
Example
PLIB_WDT_Enable ( WDT_ID_0 );
//Application loop
while(1)
{
PLIB_WDT_TimerClear ( WDT_ID_0 );
//user code
}
5.6.27.6.2 General Status Functions
5.6.27.6.2.1 PLIB_WDT_IsEnabled Function
C
bool PLIB_WDT_IsEnabled(
WDT_MODULE_ID index
);
Description
Returns the 'true', if the watchdog timer is already ON. Otherwise returns 'false'.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired WDT module
Returns
true - If the watchdog timer is on false - If the watchdog timer is off
Remarks
This function returns 'true' if the device is enabled either though the Configuration bits or in the software.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
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PLIB_WDT_ExistsEnableControl in your application to determine whether this feature is available.
Example
if (PLIB_WDT_IsEnabled ( WDT_ID_0 ) )
{
//Do some action
}
5.6.27.6.2.2 PLIB_WDT_PostscalarValueGet Function
C
char PLIB_WDT_PostscalarValueGet(
WDT_MODULE_ID index
);
Description
This function returns the WDT postscalar value. The value will correspond to a division factor.
Preconditions
None.
Parameters
Parameters Description
index Identifies the desired WDT module
Returns
The postscalar value.
Remarks
The value returned will be right-aligned.
Refer the datasheet of the specific device to get the division factor corresponding to the value.
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
PLIB_WDT_ExistsPostscalarValue in your application to determine whether this feature is available.
Example
uint8_t value;
PLIB_WDT_Enable ( WDT_ID_0 );
value = PLIB_WDT_PostscalarValueGet ( WDT_ID_0 );
5.6.27.6.3 Data Types and Constants
5.6.27.6.3.1 WDT_MODULE_ID Enumeration
C
typedef enum {
WDT_ID,
WDT_NUMBER_OF_MODULES
} WDT_MODULE_ID;
Description
WDT Module ID
This enumeration identifies the available WDT modules.
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Members
Members Description
WDT_ID WDT Module 1 ID
WDT_NUMBER_OF_MODULES Number of available WDT modules.
Remarks
The caller should not rely on the specific numbers assigned to any of these values as they may change from one processor to
the next.
5.6.27.6.4 Feature Existence Functions
5.6.27.6.4.1 PLIB_WDT_ExistsEnableControl Function
C
bool PLIB_WDT_ExistsEnableControl(
WDT_MODULE_ID index
);
Description
This function identifies whether the EnableControl feature is available on the WDT module. When this function returns true, these
functions are supported on the device:
• PLIB_WDT_Enable
• PLIB_WDT_Disable
• PLIB_WDT_IsEnabled
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
Existence of the EnableControl feature:
• true - When EnableControl feature is supported on the device
• false - When EnableControl feature is not supported on the device
Remarks
None.
5.6.27.6.4.2 PLIB_WDT_ExistsPostscalarValue Function
C
bool PLIB_WDT_ExistsPostscalarValue(
WDT_MODULE_ID index
);
Description
This function identifies whether the PostscalarValue feature is available on the WDT module. When this function returns true, this
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function is supported on the device:
• PLIB_WDT_PostscalarValueGet
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The PostscalarValue feature is supported on the device
• false - The PostscalarValue feature is not supported on the device
Remarks
None.
5.6.27.6.4.3 PLIB_WDT_ExistsTimerClear Function
C
bool PLIB_WDT_ExistsTimerClear(
WDT_MODULE_ID index
);
Description
This function identifies whether the TimerClear feature is available on the WDT module. When this function returns true, this
function is supported on the device:
• PLIB_WDT_TimerClear
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The TimerClear feature is supported on the device
• false - The TimerClear feature is not supported on the device
Remarks
None.
5.6.27.6.4.4 PLIB_WDT_ExistsWindowEnable Function
C
bool PLIB_WDT_ExistsWindowEnable(
WDT_MODULE_ID index
);
Description
This function identifies whether the WindowEnable feature is available on the WDT module. When this function returns true,
these functions are supported on the device:
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• PLIB_WDT_WindowEnable
• PLIB_WDT_WindowDisable
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance
Returns
• true - The WindowEnable feature is supported on the device
• false - The WindowEnable feature is not supported on the device
Remarks
None.
5.6.27.7 Files
Files
Name Description
plib_wdt.h Watchdog Timer (WDT) Peripheral Library interface header for Watchdog Timer
common definitions.
Description
5.6.27.7.1 plib_wdt.h
WDT Peripheral Library Interface Header
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
Watchdog Timer Peripheral Library for all families of Microchip microcontrollers. The definitions in this file are common to the
Watchdog Timer peripheral.
Functions
Name Description
PLIB_WDT_Disable Disables the WDT module.
PLIB_WDT_Enable Enables the WDT module.
PLIB_WDT_ExistsEnableControl Identifies whether the EnableControl feature exists on the WDT module.
PLIB_WDT_ExistsPostscalarValue Identifies whether the PostscalarValue feature exists on the WDT module.
PLIB_WDT_ExistsTimerClear Identifies whether the TimerClear feature exists on the WDT module.
PLIB_WDT_ExistsWindowEnable Identifies whether the WindowEnable feature exists on the WDT module.
PLIB_WDT_IsEnabled Returns the watchdog timer on/off(enable/disable) status.
PLIB_WDT_PostscalarValueGet Returns the WDT postscalar value.
PLIB_WDT_TimerClear Resets the WDT module.
PLIB_WDT_WindowDisable Disables the WDT Windowed mode.
PLIB_WDT_WindowEnable Enables the WDT Window mode.
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File Name
plib_wdt.h
Company
Microchip Technology Inc.
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5.7 System Service Library Help
5.7.1 System Service Overview
System services provide common functionality that would otherwise need to be duplicated or would force other drivers and
libraries to interact in complex and difficult to manage ways. System services have two primary types of implementations:
• System Service Libraries
• Low-Level Support
Most system service libraries follow the same basic model as a device driver (directly using a peripheral library to access
hardware) or a middleware library (using a device driver to access hardware) as the rest of the system.
Some low-level support libraries provide common (cross-micro/cross-board) interfaces, but require system-specific
implementation as part of a Board Support Package (BSP) or application configuration (for example, the low-level "raw" interrupt
support necessary for interrupt-driven configurations).
5.7.1.1 Library Interface
Data Types and Constants
Name Description
_SYS_TASKS_PRIORITIES Defines system tasks priorities.
MAIN_RETURN_CODES Predefined list of return codes for "main".
SYS_MODULE_DATA Contains module-interface info used to define a table of system
modules
SYS_MODULE_DEINITIALIZE_ROUTINE Pointer to a routine that de-initializes a system module (driver, library,
or system-maintained application)
SYS_MODULE_INDEX Identifies which instance of a system module should be initialized or
opened.
SYS_MODULE_INIT Initializes a module (including device drivers) in a current power status
as requested by the system or power manager.
SYS_MODULE_INITIALIZE_ROUTINE Pointer to a routine that initializes a system module (driver, library, or
system-maintained application).
SYS_MODULE_INTERFACE Structure contains pointers to module-interface routines for a single
system module.
SYS_MODULE_OBJ Handle to an instance of a system module.
SYS_MODULE_REINITIALIZE_ROUTINE Pointer to a routine that reinitializes a system module (driver, library, or
system-maintained application)
SYS_MODULE_STATUS_ROUTINE Pointer to a routine that gets the current status of a system module
(driver, library, or system-maintained application).
SYS_MODULE_TASKS_DATA Structure contains pointers to module's tasks routine.
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SYS_MODULE_TASKS_ROUTINE Pointer to a routine that performs the tasks necessary to maintain a
state machine in a module system module (driver, library, or
system-maintained application).
SYS_STATUS Identifies the current status/state of a system module (including device
drivers).
SYS_TASKS_PRIORITY Defines system tasks priorities.
MAIN_RETURN Defines the correct return type for the "main" routine.
MAIN_RETURN_CODE Provides the correct value for the return code from "main".
SYS_MODULE_OBJ_INVALID Object handle value returned if unable to initialize the requested
instance of a system module.
SYS_MODULE_OBJ_STATIC Object handle value returned by static modules.
SYS_MODULE_POWER_IDLE_RUN Module power-state idle-run state code.
SYS_MODULE_POWER_IDLE_STOP Module power-state idle-stop state code.
SYS_MODULE_POWER_OFF Module power-state power off state code.
SYS_MODULE_POWER_RUN_FULL Module power-state run-full state code.
SYS_MODULE_POWER_SLEEP Module power-state sleep state code.
System Functions
Name Description
SYS_Tasks Function that performs all polled system tasks.
Description
5.7.1.1.1 System Functions
5.7.1.1.1.1 SYS_Tasks Function
C
void SYS_Tasks();
Description
System Tasks Function
This function performs all polled system tasks by calling the state machine "tasks" functions for all polled modules in the system,
including drivers, services, middleware and applications.
Preconditions
The SYS_Initialize function must have been called and completed.
Returns
None.
Remarks
If the module is interrupt driven, the system will call this routine from an interrupt context.
Example
SYS_Initialize ( NULL );
while ( true )
{
SYS_Tasks ( );
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}
5.7.1.1.2 Data Types and Constants
5.7.1.1.2.1 MAIN_RETURN_CODES Enumeration
C
typedef enum {
MAIN_RETURN_FAILURE = -1,
MAIN_RETURN_SUCCESS = 0
} MAIN_RETURN_CODES;
Description
Main Routine Codes
This enumeration provides a predefined list of return codes for "main".
Remarks
These codes can be passed into the MAIN_RETURN_CODE macro to convert them to the appropriate type (or discard them if
not needed) for the Microchip microcontroller in use.
Example
MAIN_RETURN main ( void )
{
// Initialize the system
SYS_Initialize(...);
// Main Loop
while(true)
{
SYS_Tasks();
}
return MAIN_RETURN_CODE(MAIN_RETURN_SUCCESS);
}
5.7.1.1.2.2 SYS_MODULE_DATA Structure
C
typedef struct {
SYS_MODULE_INTERFACE interface;
SYS_MODULE_OBJ object;
SYS_TASKS_PRIORITY priority;
unsigned int count;
} SYS_MODULE_DATA;
Description
System Module Data
This structure contains module-interface info used to define a table of system modules.
Members
Members Description
SYS_MODULE_INTERFACE interface; Module interface (function pointers, index, etc)
SYS_MODULE_OBJ object; Object handle obtained from initialization call
SYS_TASKS_PRIORITY priority; Requested module priority (identifies "Tasks" interval)
unsigned int count; Number of intervals (of the module priority) before calling this module's "Tasks"
routine.
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Remarks
Used internally by the system services. Not to be accessed by user code.
5.7.1.1.2.3 SYS_MODULE_DEINITIALIZE_ROUTINE Type
C
typedef void (* SYS_MODULE_DEINITIALIZE_ROUTINE)(SYS_MODULE_OBJ object);
Description
System Module De-initialization Routine Pointer
This data type is a pointer to a routine that deinitializes a system module (driver, library, or system-maintained application).
Preconditions
The low-level board initialization must have (and will be) completed and the module's initialization routine will have been called
before the system will call the deinitialization routine for any modules.
Parameters
Parameters Description
object Handle to the module instance
Returns
None.
Remarks
If the module instance has to be used again, the module's "initalize" function must first be called.
Example
TBD
5.7.1.1.2.4 SYS_MODULE_INDEX Type
C
typedef unsigned short int SYS_MODULE_INDEX;
Description
System Module Index
This data type identifies to which instance of a system module a call to that module's "Initialize" and "Open" routines refers.
Remarks
Each individual module will usually define macro names for the index values it supports (ex. DRV_TMR_INDEX_1,
DRV_TMR_INDEX_2, ...).
5.7.1.1.2.5 SYS_MODULE_INIT Union
C
typedef union {
uint8_t value;
struct {
uint8_t powerState : 4;
uint8_t reserved : 4;
} sys;
} SYS_MODULE_INIT;
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Description
System Module Init
This structure provides the necessary data to initialize or reinitialize a module (including device drivers) into a requested power
state. The structure can be extended in a module specific way as to carry module specific initialization data.
Members
Members Description
uint8_t powerState : 4; Requested power state
uint8_t reserved : 4; Module-definable field, module-specific usage
Remarks
This structure is used in the device driver routines DRV__Initialize and DRV__Reinitialize that are defined by each device driver.
The "powerState" member has several pre-defined values (shown below). All other available values (within the 4-bit field) are
available for module-specific meaning.
Pre-defined powerState Values:
0. SYS_MODULE_POWER_OFF - Module power-state power off state code
1. SYS_MODULE_POWER_SLEEP - Module power-state sleep state code
2. SYS_MODULE_POWER_IDLE_STOP - Module power-state idle-stop state code
3. SYS_MODULE_POWER_IDLE_RUN - Module power-state idle-run state code
4-14. - Module-specific meaning
15. SYS_MODULE_POWER_RUN_FULL - Module power-state run-full state code
5.7.1.1.2.6 SYS_MODULE_INITIALIZE_ROUTINE Type
C
typedef SYS_MODULE_OBJ (* SYS_MODULE_INITIALIZE_ROUTINE)(const SYS_MODULE_INDEX index, const
SYS_MODULE_INIT * const init);
Description
System Module Initialization Routine Pointer
This data type is a pointer to a routine that initializes a system module (driver, library, or system-maintained application).
Preconditions
The low-level board initialization must have (and will be) completed before the system will call the initialization routine for any
modules.
Parameters
Parameters Description
index Identifier for the module instance to be initialized
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init Pointer to the data structure containing any data necessary to initialize the
module. This pointer may be null if no data is required and default initialization is
to be used.
Returns
A handle to the instance of the system module that was initialized. This handle is a necessary parameter to all of the other
system-module level routines for that module.
Remarks
This function will only be called once during system initialization.
5.7.1.1.2.7 SYS_MODULE_INTERFACE Structure
C
typedef struct {
SYS_MODULE_INITIALIZE_ROUTINE pModuleInitialize;
SYS_MODULE_REINITIALIZE_ROUTINE pModuleReinitialize;
SYS_MODULE_DEINITIALIZE_ROUTINE pModuleDeinitialize;
SYS_MODULE_STATUS_ROUTINE pModuleStatus;
SYS_MODULE_TASKS_DATA * pTasksData;
SYS_MODULE_INIT * pModuleInitData;
SYS_MODULE_INDEX index;
unsigned int tasksNum;
} SYS_MODULE_INTERFACE;
Description
System Module Interface
This structure contains pointers to module-interface routines for a single system module. The system will initialize these modules
(using their respective initialization routines) and (potentially) monitor and maintain their states using the reinitialize, deinitialize,
and status routines.
Members
Members Description
SYS_MODULE_INITIALIZE_ROUTINE
pModuleInitialize;
Pointer to the module's initialization routine
SYS_MODULE_REINITIALIZE_ROUTINE
pModuleReinitialize;
Pointer to the module's re-initializtion routine
SYS_MODULE_DEINITIALIZE_ROUTINE
pModuleDeinitialize;
Pointer to the module's de-initialization routine
SYS_MODULE_STATUS_ROUTINE
pModuleStatus;
Pointer to the module's status routine
SYS_MODULE_TASKS_DATA *
pTasksData;
Pointer to the module's "Tasks" routine
SYS_MODULE_INIT * pModuleInitData; Pointer to the module's init data table
SYS_MODULE_INDEX index; Index to the module instance
unsigned int tasksNum; Number of tasks supported by this module
Remarks
A pointer to this structure is passed to the SYS_ModuleRegister routine.
Example
TBD
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5.7.1.1.2.8 SYS_MODULE_OBJ Type
C
typedef uintptr_t SYS_MODULE_OBJ;
Description
System Module Object
This data type is a handle to a specific instance of a system module (such as a device driver).
Remarks
Code outside of a specific module should consider this as an opaque type (much like a void *). Do not make any assumptions
about base type as it may change in the future or about the value stored in a variable of this type.
5.7.1.1.2.9 SYS_MODULE_REINITIALIZE_ROUTINE Type
C
typedef void (* SYS_MODULE_REINITIALIZE_ROUTINE)(SYS_MODULE_OBJ object, const SYS_MODULE_INIT
* const init);
Description
System Module Re-initialization Routine Pointer
This data type is a pointer to a routine that re-initializes a system module (driver, library, or system-maintained application).
Preconditions
The low-level board initialization must have (and will be) completed and the module's initialization routine will have been called
before the system will call the reinitialization routine for any modules.
Parameters
Parameters Description
object Handle to the module instance
init Pointer to the data structure containing any data necessary to initialize the
module. This pointer may be null if no data is required and default initialization is
to be used.
Returns
None.
Remarks
This operation uses the same initialization data structure as the Initialize operation.
This operation can be used to change the power state of a module.
This operation can also be used to refresh the hardware state as defined by the initialization data, thus it must guarantee that all
hardware state has been refreshed.
This function can be called multiple times to reinitialize the module.
Example
TBD
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5.7.1.1.2.10 SYS_MODULE_STATUS_ROUTINE Type
C
typedef SYS_STATUS (* SYS_MODULE_STATUS_ROUTINE)(SYS_MODULE_OBJ object);
Description
System Module Status Routine Pointer
This data type is a pointer to a routine that gets the current status of a system module (driver, library, or system-maintained
application).
Preconditions
The low-level board initialization must have (and will be) completed and the module's initialization routine will have been called
before the system will call the status routine for any modules.
Parameters
Parameters Description
object Handle to the module instance
Returns
One of the possible status codes from SYS_STATUS
Remarks
A module's status operation can be used to determine when any of the other module level operations has completed as well as
to obtain general status of the module. The value returned by the status routine will be checked after calling any of the module
operations to find out when they have completed.
If the status operation returns SYS_STATUS_BUSY, the previous operation has not yet completed. Once the status operation
returns SYS_STATUS_READY, any previous operations have completed.
The value of SYS_STATUS_ERROR is negative (-1). A module may define module-specific error values of less or equal
SYS_STATUS_ERROR_EXTENDED (-10).
The status function must NEVER block.
If the status operation returns an error value, the error may be cleared by calling the reinitialize operation. If that fails, the
deinitialize operation will need to be called, followed by the initialize operation to return to normal operations.
Example
TBD
5.7.1.1.2.11 SYS_MODULE_TASKS_DATA Structure
C
typedef struct {
SYS_MODULE_TASKS_ROUTINE pTasksFunction;
bool intModule;
} SYS_MODULE_TASKS_DATA;
Description
System Module Tasks data
This structure contains pointers to module's tasks routine. A module can have an array of such structures depending on number
of tasks routines it supports. The system will either directly/indirectly call the tasks routine depending on the value of intModule.
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Members
Members Description
SYS_MODULE_TASKS_ROUTINE
pTasksFunction;
Pointer to the module's "Tasks" routine
bool intModule; Tasks type (polled/interrupt)
Remarks
A pointer to this structure is passed to the SYS_ModuleRegister routine.
Example
TBD
5.7.1.1.2.12 SYS_MODULE_TASKS_ROUTINE Type
C
typedef void (* SYS_MODULE_TASKS_ROUTINE)(SYS_MODULE_OBJ object);
Description
System Module Tasks Routine Pointer
This data type is a pointer to a routine that performs the tasks necessary to maintain a state machine in a module system module
(driver, library, or system-maintained application).
Preconditions
The low-level board initialization must have (and will be) completed and the module's initialization routine will have been called
before the system will call the deinitialization routine for any modules.
Parameters
Parameters Description
object Handle to the module instance
Returns
None.
Remarks
If the module is interrupt driven, the system will call this routine from an interrupt context.
Example
TBD
5.7.1.1.2.13 SYS_STATUS Enumeration
C
typedef enum {
SYS_STATUS_ERROR_EXTENDED = -10,
SYS_STATUS_ERROR = -1,
SYS_STATUS_UNINITIALIZED = 0,
SYS_STATUS_BUSY = 1,
SYS_STATUS_READY = 2,
SYS_STATUS_READY_EXTENDED = 10
} SYS_STATUS;
Description
System Module Status
This enumeration identifies the current status/state of a system module (including device drivers).
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Members
Members Description
SYS_STATUS_ERROR_EXTENDED = -10 Indicates that a non-system defined error has occurred. The caller must call the
extended status routine for the module in question to identify the error.
SYS_STATUS_ERROR = -1 An un-specified error has occurred.
SYS_STATUS_UNINITIALIZED = 0 The module has not yet been initialized
SYS_STATUS_BUSY = 1 An operation is currently in progress
SYS_STATUS_READY = 2 Any previous operations have succeeded and the module is ready for additional
operations
SYS_STATUS_READY_EXTENDED = 10 Indicates that the module is in a non-system defined ready/run state. The caller
must call the extended status routine for the module in question to identify the
state.
Remarks
This enumeration is the return type for the system-level status routine defined by each device driver or system module (for
example, DRV_I2C_Status).
5.7.1.1.2.14 SYS_TASKS_PRIORITY Enumeration
C
typedef enum _SYS_TASKS_PRIORITIES {
SYS_TASKS_PRIORITY_INVALID = 0,
SYS_TASKS_PRIORITY_HIGH,
SYS_TASKS_PRIORITY_MEDIUM,
SYS_TASKS_PRIORITY_LOW
} SYS_TASKS_PRIORITY;
Description
System Tasks Priority
This enumeration defines the available system tasks priorities.
Members
Members Description
SYS_TASKS_PRIORITY_INVALID = 0 Invalid priority (can be used as a sentinal value)
SYS_TASKS_PRIORITY_HIGH High priority tasks are called every time through the loop
SYS_TASKS_PRIORITY_MEDIUM Called at the medium priority interval.
SYS_TASKS_PRIORITY_LOW Called at the low priority interval.
Remarks
To use medium priority tasks, a medium priority interval must be defined by defining
SYS_TASKS_CONFIG_MEDIUM_INTERVAL to the desired interval (in milliseconds).
To use low priority tasks, a low priority interval must be defined by defining SYS_TASKS_CONFIG_LOW_INTERVAL to the
desired interval (in milliseconds).
5.7.1.1.2.15 MAIN_RETURN Macro
C
#define MAIN_RETURN void
Description
Main Routine Return Type
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This macro defines the correct return type for the "main" routine for the selected Microchip microcontroller family.
Remarks
This type changes depending upon which family of Microchip microcontrollers is chosen. Most Microchip microcontrollers do not
return any value from "main".
Example
MAIN_RETURN main ( void )
{
// Initialize the system
SYS_Initialize(...);
// Main Loop
while(true)
{
SYS_Tasks();
}
return MAIN_RETURN_CODE(MAIN_RETURN_SUCCESS);
}
5.7.1.1.2.16 MAIN_RETURN_CODE Macro
C
#define MAIN_RETURN_CODE(c)
Description
Main Routine Code Macro
This macro provides the correct value for the return code from "main".
Remarks
Most Microchip microcontrollers do not provide a return value from "main". Therefore, this macro discards the code it is given
unless it is needed.
Example
MAIN_RETURN main ( void )
{
// Initialize the system
SYS_Initialize(...);
// Main Loop
while(true)
{
SYS_Tasks();
}
return MAIN_RETURN_CODE(MAIN_RETURN_SUCCESS);
}
5.7.1.1.2.17 SYS_MODULE_OBJ_INVALID Macro
C
#define SYS_MODULE_OBJ_INVALID ((SYS_MODULE_OBJ) -1 )
Description
System Module Object Invalid
This is the object handle value returned if unable to initialize the requested instance of a system module.
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Remarks
Do not rely on the actual value of this constant. It may change in future implementations.
5.7.1.1.2.18 SYS_MODULE_OBJ_STATIC Macro
C
#define SYS_MODULE_OBJ_STATIC ((SYS_MODULE_OBJ) 0 )
Description
System Module Object Static
This is the object handle value returned by static system modules.
Remarks
Do not rely on the actual value of this constant. It may change in future implementations.
5.7.1.1.2.19 SYS_MODULE_POWER_IDLE_RUN Macro
C
#define SYS_MODULE_POWER_IDLE_RUN 3
Description
System Module Power Idle-Run State
This value identifies the current power status/state of a system module (including device drivers). It is used to indicate that the
module should prepare to enter an idle-run state.
Remarks
An idle-run state indicates that the core CPU clock may be stopped, but the module's peripheral clock may continue running and
peripheral operations may continue as long as no code needs to be executed. If code needs to execute, the module must cause
an interrupt.
This value is passed in the powerState field of the SYS_MODULE_INIT structure that takes part in all modules initialization and
reinitialization.
The power state codes between SYS_MODULE_POWER_IDLE_RUN (with a value of 3) and
SYS_MODULE_POWER_RUN_FULL (with a value of 15) are available for module-specific definition and usage.
5.7.1.1.2.20 SYS_MODULE_POWER_IDLE_STOP Macro
C
#define SYS_MODULE_POWER_IDLE_STOP 2
Description
System Module Power Idle-Stop State
This value identifies the current power status/state of a system module (including device drivers). It is used to indicate that the
module should prepare to enter an idle-stop state.
Remarks
An idle-stop state indicates that the core CPU clock may be stopped, but the module's peripheral clock may continue running.
However, the peripheral should prepare to stop operations when the idle state is entered.
This value is passed in the powerState field of the SYS_MODULE_INIT structure that takes part in all modules initialization and
reinitialization.
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The power state codes between SYS_MODULE_POWER_IDLE_RUN (with a value of 3) and
SYS_MODULE_POWER_RUN_FULL (with a value of 15) are available for module-specific definition and usage.
5.7.1.1.2.21 SYS_MODULE_POWER_OFF Macro
C
#define SYS_MODULE_POWER_OFF 0
Description
System Module Power Off State
This value identifies the current power status/state of a system module (including device drivers). It is used to indicate that the
module should prepare to enter a full power-off state.
Remarks
A power off state indicates that power may be completely removed (0 Volts).
This value is passed in the powerState field of the SYS_MODULE_INIT structure that takes part in all modules initialization and
reinitialization.
The power state codes between SYS_MODULE_POWER_IDLE_RUN (with a value of 3) and
SYS_MODULE_POWER_RUN_FULL (with a value of 15) are available for module-specific definition and usage.
5.7.1.1.2.22 SYS_MODULE_POWER_RUN_FULL Macro
C
#define SYS_MODULE_POWER_RUN_FULL 15
Description
System Module Power Run-Full State
This value identifies the current power status/state of a system module (including device drivers). It is used to indicate that the
module should prepare to enter an run-full state.
Remarks
An run-full state indicates that the core CPU and pereipheral clocks are operational at their normal configured speed and the
module should be ready for normal operation.
This value is passed in the powerState field of the SYS_MODULE_INIT structure that takes part in all modules initialization and
reinitialization.
The power state codes between SYS_MODULE_POWER_IDLE_RUN (with a value of 3) and
SYS_MODULE_POWER_RUN_FULL (with a value of 15) are available for module-specific definition and usage.
5.7.1.1.2.23 SYS_MODULE_POWER_SLEEP Macro
C
#define SYS_MODULE_POWER_SLEEP 1
Description
System Module Power Sleep State
This value identifies the current power status/state of a system module (including device drivers). It is used to indicate that the
module should prepare to enter a sleep state.
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Remarks
A Sleep state indicates that the core CPU and peripheral clocks may be stopped and no code will execute and any module
hardware will be stopped.
This value is passed in the powerState field of the SYS_MODULE_INIT structure that takes part in all modules initialization and
reinitialization.
The power state codes between SYS_MODULE_POWER_IDLE_RUN (with a value of 3) and
SYS_MODULE_POWER_RUN_FULL (with a value of 15) are available for module-specific definition and usage.
5.7.1.2 Files
Files
Name Description
sys_common.h Common definitions and declarations required for the system.
sys_module.h Defines definitions and declarations related to system modules.
system.h Aggregates all of the system services library interface headers.
Description
5.7.1.2.1 sys_common.h
System Services Common Library Header
This file defines the common definitions and declarations required for the system.
Remarks
This file is included by "system.h".
Enumerations
Name Description
_SYS_TASKS_PRIORITIES Defines system tasks priorities.
MAIN_RETURN_CODES Predefined list of return codes for "main".
SYS_TASKS_PRIORITY Defines system tasks priorities.
Macros
Name Description
MAIN_RETURN Defines the correct return type for the "main" routine.
MAIN_RETURN_CODE Provides the correct value for the return code from "main".
File Name
sys_common.h
Company
Microchip Technology Inc.
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5.7.1.2.2 sys_module.h
System Module Header
This file defines definitions and interfaces related to system modules.
Remarks
This file is included via "system.h" and does not normally need to be included directly.
Enumerations
Name Description
SYS_STATUS Identifies the current status/state of a system module (including device drivers).
Functions
Name Description
SYS_Initialize Function that initializes all modules in the system.
SYS_Tasks Function that performs all polled system tasks.
Macros
Name Description
SYS_MODULE_OBJ_INVALID Object handle value returned if unable to initialize the requested instance
of a system module.
SYS_MODULE_OBJ_STATIC Object handle value returned by static modules.
SYS_MODULE_POWER_IDLE_RUN Module power-state idle-run state code.
SYS_MODULE_POWER_IDLE_STOP Module power-state idle-stop state code.
SYS_MODULE_POWER_OFF Module power-state power off state code.
SYS_MODULE_POWER_RUN_FULL Module power-state run-full state code.
SYS_MODULE_POWER_SLEEP Module power-state sleep state code.
Structures
Name Description
SYS_MODULE_DATA Contains module-interface info used to define a table of system modules
SYS_MODULE_INTERFACE Structure contains pointers to module-interface routines for a single system
module.
SYS_MODULE_TASKS_DATA Structure contains pointers to module's tasks routine.
Types
Name Description
SYS_MODULE_DEINITIALIZE_ROUTINE Pointer to a routine that de-initializes a system module (driver, library,
or system-maintained application)
SYS_MODULE_INDEX Identifies which instance of a system module should be initialized or
opened.
SYS_MODULE_INITIALIZE_ROUTINE Pointer to a routine that initializes a system module (driver, library, or
system-maintained application).
SYS_MODULE_OBJ Handle to an instance of a system module.
SYS_MODULE_REINITIALIZE_ROUTINE Pointer to a routine that reinitializes a system module (driver, library, or
system-maintained application)
SYS_MODULE_STATUS_ROUTINE Pointer to a routine that gets the current status of a system module
(driver, library, or system-maintained application).
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SYS_MODULE_TASKS_ROUTINE Pointer to a routine that performs the tasks necessary to maintain a
state machine in a module system module (driver, library, or
system-maintained application).
Unions
Name Description
SYS_MODULE_INIT Initializes a module (including device drivers) in a current power status as
requested by the system or power manager.
File Name
sys_module.h
Company
Microchip Technology Inc.
5.7.1.2.3 system.h
System Services Library Interface Header
This file aggregates all of the system services library interface headers so that client code only needs to include this one single
header to obtain prototypes and definitions for the interface to all system service libraries. System services provide common
functionality that would otherwise need to be duplicated by multiple other modules or would force other drivers and libraries to
interact in complex and hard to manage ways. System services eliminate conflicts by controlling access shared resources.
Remarks
The directory in which this file resides should be added to the compiler's search path for header files. Many Harmony libraries
assume that "system.h" is available in the "include" path.
File Name
system.h
Company
Microchip Technology Inc.
5.7.2 Clock System Service Library
5.7.2.1 Introduction
Clock System Service Library
for
Microchip Microcontrollers
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This library provides an interface to manage the Oscillator module on Microchip family of micro controllers during different modes
of operation.
Overview of Oscillator
The Oscillator is the heart of the microcontroller which provides the clock on which the core and the peripherals run. For all of the
oscillators present on a Microchip microcontroller, two kinds of configurations exist:
• Through Configuration bits
• At Execution time
The first is through 'Configuration bits' which is a one-time configuration and it is done during the programming of the device.
These one-time configurations are programmed in the code memory. The other is 'Execution time' configuration, which deals
with features that are allowed to change during the code execution. This library provides functions which deals only with the
'Execution time' configurable features of the Oscillator module.
Oscillator is a device which supports the CPU and other peripherals by providing clock. So there is more of initialization and a
little or no run time operations. The run time operations would be getting the System clock or any other 'output clocks'. If the
application want to change any of the initialization, at run time, that can be done.
The Oscillator module as a whole is a group of oscillators. These are provided for the application to choose right oscillator for his
application. It is important to wisely choose the oscillator and the frequency at which the CPU and the other peripheral should run
at in a very power critical environments.
5.7.2.2 Release Notes
MPLAB Harmony Version: v0.70b Oscillator System Service Library Version : 0.01a Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.7.2.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED AS IS MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.7.2.4 Using the Library
This topic describes the basic architecture of the Oscillator System Service and provides information and examples on how to
use it.
Interface Header File: sys_osc.h
The interface to the Oscillator System Service is defined in the "sys_osc.h" header file, which is included by the "sys.h" header
file.
Any C language source (.c) file that uses the Oscillator system service must include "sys.h".
5.7.2.4.1 Abstraction Model
To understand the oscillator module and how each of its feature is mapped in this library, it is important to understand all these
terminologies.
Oscillators:
A clock source is hardware which generates oscillations. This may be internal or external.
Divisor and Multiplier/PLL:
These are hardware modules which can scale the clock. The rate at which the scaling is done may be fixed or configurable.
Clocks:
Clock outputs means output lines from the oscillator module which may route to different modules of the device or to the
CPU(the system clock).
The diagram above gives a simplified explanation and the relationship between the above mentioned terms. In most of the
cases, there are multiple clock source options available for each of the clock outputs. But not all the clock sources are available
for all the output clocks. Scaling is an optional feature in most of the cases.
5.7.2.4.2 Library Overview
The diagram below shows the flow of an application call to Oscillator System service. Refer to the section System Services
Overview for how the system services operates in a system.
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The library interface routines are divided into various subsections, each of the subsection addresses one of the blocks or the
overall operation of the Oscillator System Service module.
Library Interface Section Description
System Initialization Functions This section provides an initialization routine to configure the module at the
startup of the system and Re-initialization if the application want to change
any of the initialization settings
System Status Functions Provides function to read different clock outputs from the oscillator module.
Optional System Functions FRC oscillator tuning and clock fail detection APIs
5.7.2.4.3 How the Library Works
5.7.2.4.3.1 Initialization
Oscillator is a module with a little or no run time operations. So the application must do most of the configurations at the time of
System initialization even though it is allowed to change the clock frequency at run time.
Not all the devices will need all the initialization parameters of the structure. Refer the datasheet of the specific device to know
the features available in each device.
Call the initialization API by passing the initialization data required.
generalInit.auxOscMode = CLK_AUX_HS;
generalInit.auxPllEnable = true;
generalInit.refOscEnable = true;
generalInit.trimValue = 0;
generalInit.secondaryOscKeepEnabled = true;
generalInit.onWaitOperation = CLK_ON_WAIT_IDLE;
generalInit.sysClockSource = SYS_CLK_SYSCLK_PRIMARY_PLL;
generalInit.usbClockSource = SYS_CLK_USBCLK_PRIMARY_PLL;
generalInit.auxClockSource = CLK_AUX_CLOCK_PRIMARY_PLL;
generalInit.refOscBaseClock = CLK_REF_PB_CLOCK;
generalInit.pll_multiplier = SYS_CLK_PLL_SYSCLOCK_BY_20;
generalInit.frcClockDivisor = CLK_FRC_DIVISOR_4;
generalInit.peripheralBusClkDiv = CLK_PB_CLOCK_DIV_8;
generalInit.auxPllMultiplier = CLK_PLL_MUL_18;
generalInit.refOscDivisor = = 1024;
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generalInit.dozeRatio = CLK_DOZE_RATIO_4;
generalInit.dozeRecoverOnInterrupt = true;
SYS_CLK_Initialize (&generalInit);
Oscillator needs some time to settle. So it is recommended to do the oscillator initialization before initializing other modules.
Check for the oscillator status once all the initializations are complete and before application task routine takes control.
5.7.2.4.3.2 Changing the Clock
It is allowed to change any of the clock frequency at run time. There is a single API provided to set the clock source and
configure it to the clock frequency requested. User is supposed to look at the data sheet ad find out one of the possible value of
the output clock. The API, internally adjusts the multipliers/divisors necessary.
Setting the System Clock:
SYS_CLK_ClockFrequencySet(CLK_SYSTEM, SYS_CLK_SOURCE_FRC, 8000000);
Setting the USB Clock:
SYS_CLK_ClockFrequencySet(CLK_USB, SYS_CLK_SOURCE_FRCPLL, 48000000);
5.7.2.4.3.3 Using Status Functions
Once the the initialization is done, oscillator needs some time to settle down and get into its normal operation. The application
can add a delay, do other initialization or wait in the status check routine. To minimize the waiting time it is highly recommended
to do the initialization before all other initializations.
// Populate the oscillator initialization structure
//Call the initialization routines
//Do other initializations
//Check whether all the oscillators are ready
while((!SYS_OSC_IsReady(OSC_OUTPUT_SYSCLOCK)) &&
(!SYS_OSC_IsReady(OSC_OUTPUT_PBCLOCK)) &&
(!SYS_OSC_IsReady(OSC_OUTPUT_USBCLOCK))&&
(!SYS_OSC_IsReady(OSC_OUTPUT_GFXCLOCK)));
while(1)
{
//Application
}
The application can read the frequency at which the system is running at any time after the initialization is complete.
uint32_t sysClockOutputHz, usbClockOutputHz, pbClockOutputHz, gfxClockOutputHz;
//Get the system clock
sysClockOutputHz = SYS_OSC_ClockFrequencyGet(OSC_OUTPUT_SYSCLOCK);
//Get the peripheral clock
pbClockOutputHz = SYS_OSC_ClockFrequencyGet(OSC_OUTPUT_PBCLOCK);
//Get the USB clock
usbClockOutputHz = SYS_OSC_ClockFrequencyGet(OSC_OUTPUT_USBCLOCK);
//Get the graphics clock
gfxClockOutputHz = SYS_OSC_ClockFrequencyGet(OSC_OUTPUT_GFXCLOCK);
5.7.2.4.3.4 Oscillator Tuning
Tuning the Oscillator:
Oscillator Tuning will help compensate for temperature effects on the FRC frequency over a wide range of temperatures. The
tuning step size is an approximation, the application is supposed to try different values to achieve the best result. In some of the
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devices there are different tuning modes available.
Direct Number method:
//Software must unlock before the start of the tuning.
SYS_OSC_FRCTUNING_DATA tuningInput;
OSC_FRC_TUNING_VALUE tuningValue = OSC_TUNE_TO_CENTRAL_FREQ_PLUS_0_86;
tuningInput.tuningMode = OSC_TUNING_USING_NUMBER;
tuningInput.tuningData = &tuningValue;
SYS_OSC_FRCTuningSet(&tuningInput);
Sequential Dithering:
To get the Sequential Dithering working, the application is suppose to set the value in 7 sequencers and also in the tuning
register. Then configure the PWM module, set the period and pulse width. The Oscillator module generates frequencies
corresponding the value specified in these registers in every 8th PWM cycle.
//Software must unlock before the start of the tuning.
SYS_OSC_FRCTUNING_DATA tuningInput;
OSC_FRC_TUNING_VALUE tuningValue[8];
//Initialize with tuning values
tuningValue[0] = OSC_TUNE_TO_CENTRAL_MINUS_2_25_PERC;
tuningValue[1] = OSC_TUNE_TO_CENTRAL_MINUS_1_5_PERC;
tuningValue[2] = OSC_TUNE_TO_CENTRAL_MINUS_0_375_PERC;
tuningValue[3] = OSC_TUNE_TO_CENTRAL_PLUS_0_43_PERC;
tuningValue[4] = OSC_TUNE_TO_CENTRAL_PLUS_1_29_PERC;
tuningValue[5] = OSC_TUNE_TO_CENTRAL_PLUS_2_54_PERC;
tuningValue[6] = OSC_TUNE_TO_CENTRAL_MINUS_3_PERC;
tuningValue[7] = OSC_TUNE_TO_CENTRAL_MINUS_3_PERC;
tuningInput.tuningMode = OSC_TUNING_SEQ_DITHER;
tuningInput.tuningData = tuningValue;
SYS_OSC_FRCTuningSet(&tuningInput);
Pseudo-Random Number:
Select the tuning mode. Then configure the PWM module, set the period and pulse width. The Oscillator system generates a
4-bit number based on Pseudo-Random number generation algorithm. It then uses this value to tune the FRC oscillator. The
module will generate different frequencies corresponding to the generated Pseudo-Random numbers every 8th PWM cycle.
//Software must unlock before the start of the tuning.
SYS_OSC_FRCTUNING_DATA tuningInput;
OSC_FRC_TUNING_VALUE tuningValue = 0x7FFF;
tuningInput.tuningMode = OSC_TUNING_PSEUDO_RANDOM;
tuningInput.tuningData = &tuningValue;
SYS_OSC_FRCTuningSet(&tuningInput);
5.7.2.5 Configuring the Library
The configuration of the Oscillator System Service Library is based on the file sys_config.h
This header file contains the configuration selection for the Oscillator System Service Library. Based on the selections made, the
Oscillator System Service Library will support or not support selected features. These configuration settings will apply to all
instances of the Oscillator System Service Library.
This header can be placed anywhere, the path of this header needs to be present in the include search path for a successful
build. Refer to the Applications Overview section for more details.
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5.7.2.6 Library Interface
Data Types and Constants
Name Description
SYS_CLK_FRCTUNING_DATA Defines the data required for tuning the FRC Oscillator.
SYS_CLK_INIT Defines the data required to initialize the Oscillator for the Clock System Service.
SYS_CLK_OUTPUT Lists the available clock outputs.
SYS_CLK_SOURCE Lists the available clock outputs.
CLK_PERIPH_BUS_MZ Lists the available peripheral clocks.
CLK_SOURCE_PERIPHERAL Lists the available clock sources for the peripheral clock.
Optional System Functions
Name Description
SYS_CLK_FRCTuningSet Starts the FRC tuning.
System Initialization Functions
Name Description
SYS_CLK_ClockFailureCallbackRegister Allows registration of a call back function that will be triggered on a clock
failure.
SYS_CLK_Initialize Initializes hardware and internal data structure of the System Clock.
System Status Functions
Name Description
SYS_CLK_ClockFrequencyGet Gets the selected clock frequency in Hz.
SYS_CLK_ClockFrequencySet Configures the clock multiplier and divisor values.
SYS_CLK_ClockIsReady Checks whether the selected clock output is stable and ready to use.
SYS_CLK_FRCTune This function is used for direct value based FRC oscillator tuning.
SYS_CLK_MZPeriphBusFreqGet Gets the selected peripheral clock frequency in Hz (PIC32MZ only).
Description
5.7.2.6.1 System Initialization Functions
5.7.2.6.1.1 SYS_CLK_ClockFailureCallbackRegister Function
C
void SYS_CLK_ClockFailureCallbackRegister(
void * callback
);
Description
This function allows registration of a callback function that will be triggered on a clock failure. In addition, this function monitors
the Fail-Safe Clock Monitor (FSCM).
Preconditions
None.
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Parameters
Parameters Description
index Identifies the desired System Clock
Returns
None.
Remarks
This function is not available on all devices. Please refer to the specific device data sheet for availability.
Example
SYS_CLK_ClockFailureCallbackRegister(&ErrorHandle);
void ErrorHandle (void)
{
//Handle the error.
}
5.7.2.6.1.2 SYS_CLK_Initialize Function
C
void SYS_CLK_Initialize(
const SYS_CLK_INIT const * clkInit
);
Description
This function initializes the hardware and internal data structure of the System Clock.
Preconditions
None.
Parameters
Parameters Description
clkInit Pointer to a data structure containing any data necessary to initialize the System
Clock. This pointer can be NULL if no data is required as static overrides have
been provided.
Returns
None.
Example
SYS_CLK_INIT generalInit;
// Populate the oscillator initialization structure
generalInit.systemClockSource = SYS_CLK_SOURCE_FRC_SYSPLL;
generalInit.systemClockFrequency = 30000000;
generalInit.usbClockEnable = true;
generalInit.usbClockSource = SYS_CLK_SOURCE_PRIMARY_USBPLL;
generalInit.usbClockFrequency = 48000000;
generalInit.peripheralClockEnable = true;
generalInit.peripheralClockSource = SYS_CLK_SOURCE_SYSCLK_OUT;
generalInit.peripheralClockFrequency = 15000000;
generalInit.referenceClockEnable = true;
generalInit.referenceClockSource = SYS_CLK_SOURCE_FRC;
generalInit.referenceClockFrequency = 8000000;
SYS_CLK_Initialize (&generalInit);
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Remarks: This could be called at the time of system initialization to initialize the
oscillator or after initialization to change any of the initialization
settings.
5.7.2.6.2 System Status Functions
5.7.2.6.2.1 SYS_CLK_ClockFrequencyGet Function
C
unsigned long SYS_CLK_ClockFrequencyGet(
SYS_CLK_OUTPUT clockOutput
);
Description
This function gets the selected clock frequency in Hz.
Preconditions
The selected clock output must be configured and enabled.
Returns
Clock frequency in Hz.
Example
unsigned long sysClockOutputHz;
sysClockOutputHz = SYS_CLK_ClockFrequencyGet(CLK_SYSTEM);
5.7.2.6.2.2 SYS_CLK_ClockFrequencySet Function
C
unsigned long SYS_CLK_ClockFrequencySet(
SYS_CLK_OUTPUT outputClock,
SYS_CLK_SOURCE clockSource,
unsigned long clockFrequency
);
Description
This function configures the clock multiplier and divisor values. This function covers all of the configuration for an oscillator clock
output. All of the arguments in the API may not be applicable in all cases. The API discards the arguments that are not relevant.
Preconditions
The SYS_CLK_Initialize function should be called before calling this API.
Parameters
Parameters Description
outputClock Clock for which the source is to be selected
clockSource Select the clock source
clockFrequency Select the clock clock frequecncy
Returns
None.
Example
SYS_CLK_ClockFrequencySet(CLK_SYSTEM, SYS_CLK_SOURCE_FRC, 8000000);
Remarks: This API returns a zero if it cannot achieve the value requested. The user
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must recheck the hardware and enter the possible value.
5.7.2.6.2.3 SYS_CLK_ClockIsReady Function
C
bool SYS_CLK_ClockIsReady(
SYS_CLK_OUTPUT clockOutput
);
Description
This function checks whether the selected clock output is stable. This should be checked at system start-up, after the
initialization is complete and also each time when there is a change in the clock setup configuration. This function checks the
PLL lock status to determine whether the PLL is enabled.
Preconditions
None.
Returns
• true - The selected clock output is stable
• false - The selected clock output is not stable
Remarks
This function should be called at system start-up.
This API is non-blocking in nature, so the application must call this API in a loop to wait until the initial settling time of the
oscillator expires and the oscillator becomes ready.
Example
//Wait until the selected clock output is getting stabilized.
while(!SYS_CLK_ClockIsReady(CLK_SYSTEM));
5.7.2.6.2.4 SYS_CLK_FRCTune Function
C
void SYS_CLK_FRCTune(
OSC_FRC_DIV tuningData
);
Description
This function triggers the FRC tuning based on the selected mode. FRC tuning functionality has been provided to help customers
compensate for temperature effects on the FRC frequency over a wide range of temperatures.
Preconditions
The device selected must support the oscillator tuning feature.
Parameters
Parameters Description
tuningData One of the possible value of OSC_FRC_TUNE enum
Returns
None.
Remarks
The tuning step size is an approximation, and is neither characterized, nor tested.
This API may can be only used with devices that support direct value based FRC tuning. Refer to the specific device data sheet
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to determine whether this feature exists for your device.
Example
SYS_CLK_FRCTune( OSC_FRC_TUNE_MINUS_1_875_PERCENT);
5.7.2.6.2.5 SYS_CLK_MZPeriphBusFreqGet Function
C
unsigned long SYS_CLK_MZPeriphBusFreqGet(
CLK_PERIPH_BUS_MZ periphBus
);
Description
This function gets the selected clock frequency in Hz (PIC32MZ only).
Preconditions
The selected clock output must be configured and enabled.
Returns
Clock frequency in Hz.
Example
unsigned long sysClockOutputHz;
sysClockOutputHz = SYS_CLK_ClockFrequencyGet(CLK_PERIPH_BUS_2);
5.7.2.6.3 Optional System Functions
5.7.2.6.3.1 SYS_CLK_FRCTuningSet Function
C
void SYS_CLK_FRCTuningSet(
SYS_CLK_FRCTUNING_DATA * tuningData
);
Description
This function triggers the FRC tuning based on the selected mode.
Preconditions
The device selected must support the oscillator tuning feature.
Parameters
Parameters Description
tuningData An instance of the structure SYS_CLK_FRCTUNING_DATA Data used for tuning
tuningMode FRC oscillator tuning mode
Returns
None.
Remarks
This function is not applicable for devices that do not have an FRC oscillator and devices that do have an FRC oscillator, but not
FRC tuning. Refer to the specific device data sheet to determine whether this feature exists for your device.
Example
SYS_CLK_FRCTUNING_DATA tuningInput;
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CLK_FRC_TUNING_VALUE tuningValue;
tuningData.tuningMode = CLK_TUNING_USING_NUMBER;
tuningInput.tuningData = &tuningValue;
SYS_CLK_FRCTuningSet(&tuningInput);
5.7.2.6.4 Data Types and Constants
5.7.2.6.4.1 SYS_CLK_FRCTUNING_DATA Structure
C
typedef struct {
OSC_TUNING_MODE tuningMode;
uint8_t * tuningData;
} SYS_CLK_FRCTUNING_DATA;
Description
Clock module FRC tuning modes
This structure defines the necessary data required to tune the FRC Oscillator.
Members
Members Description
OSC_TUNING_MODE tuningMode; Oscillator tuning mode
uint8_t * tuningData; The data required may vary depending on the mode. This could be pointed to a
variable or an array of data
Remarks
None.
5.7.2.6.4.2 SYS_CLK_INIT Structure
C
typedef struct {
SYS_CLK_SOURCE systemClockSource;
unsigned long systemClockFrequency;
bool usbClockEnable;
SYS_CLK_SOURCE usbClockSource;
unsigned long usbClockFrequency;
bool peripheralClockEnable;
SYS_CLK_SOURCE peripheralClockSource;
unsigned long peripheralClockFrequency;
bool referenceClockEnable;
SYS_CLK_SOURCE referenceClockSource;
unsigned long referenceClockFrequency;
bool secondaryOscKeepEnabled;
OSC_OPERATION_ON_WAIT onWaitInstruction;
bool referenceStopInIdle;
bool referenceSuspendInSleep;
} SYS_CLK_INIT;
Description
Clock System Service Reference Oscillator initialization data
This structure defines the data required to initialize the Oscillator for the Clock System Service.
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Members
Members Description
SYS_CLK_SOURCE systemClockSource; Initializations for System clock
unsigned long systemClockFrequency; Set the System clock frequency
bool usbClockEnable; Initializations for USB clock Enable the USB clock. If the device doesn't need USB
clock, set this variable to 'false'. In that case, user need not set next two variables.
SYS_CLK_SOURCE usbClockSource; Select the USB clock source
unsigned long usbClockFrequency; Set the USB clock frequency
bool peripheralClockEnable; Initializations for Peripheral clock Enable the Peripheral clock. If the device doesn't
need Peripheral clock, set this variable to 'false'. In that case, user need not set
next two variables.
SYS_CLK_SOURCE
peripheralClockSource;
Select the Peripheral clock source
unsigned long peripheralClockFrequency; Set the Peripheral clock frequency
bool referenceClockEnable; Initializations for Reference clock out Set this variable to 'true' to enable the
reference clock out. The system service will discard this either if this variable is set
to 'false' or if the device doesn't has 'reference clock out' feature.
SYS_CLK_SOURCE
referenceClockSource;
Base clock for the reference clock out. This will be divided and tuned to get the
actual Reference clock output
unsigned long referenceClockFrequency; Use this to fine tune the divided reference oscillator clock out.
bool secondaryOscKeepEnabled; Even though the secondary oscillator is not used, keeping the oscillator running,
allows a fast switch to the lower system clock for low-power operation
OSC_OPERATION_ON_WAIT
onWaitInstruction;
System action on a 'Wait' instruction
bool referenceStopInIdle; Stop reference clock out in Idle mode
bool referenceSuspendInSleep; Stop reference clock out in sleep mode
Remarks
Calling this API may not be essential in some cases. Some of the elements in this structure are part of the library configuration
file. Setting them here will override the configuration file setting.
5.7.2.6.4.3 SYS_CLK_OUTPUT Enumeration
C
typedef enum {
CLK_SYSTEM,
CLK_PERIPHERAL,
CLK_USB,
CLK_REFERENCE,
CLK_GRAPHIX,
CLK_ADCPWM
} SYS_CLK_OUTPUT;
Description
Clocks enumeration
This enumeration lists all of the available clock outputs. This is used by the SYS_CLK_ClockFrequencyGet and
SYS_CLK_ClockIsReady functions.
Members
Members Description
CLK_SYSTEM Selects System clock output. This is used by the CPU and some of the peripherals
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CLK_PERIPHERAL Selects peripheral clock output. This is used by most of the peripherals
CLK_USB Selects USB clock output. This is used by the USB module
CLK_REFERENCE Selects referece clock output. This to check any of the clock or it could be used as
a clock source for other devices
CLK_GRAPHIX Selects Graphics clock output. This is used by the display module
CLK_ADCPWM Selects ADC/PWM clock
Remarks
'Clock output' means output from the clock source.
5.7.2.6.4.4 SYS_CLK_SOURCE Enumeration
C
typedef enum {
SYS_CLK_TOTAL_SOURCES,
SYS_CLK_SOURCE_EXTERNAL,
SYS_CLK_SOURCE_USBPLL_OUT,
SYS_CLK_SOURCE_SYSPLL_OUT,
SYS_CLK_SOURCE_PBCLK_OUT,
SYS_CLK_SOURCE_SYSCLK_OUT,
SYS_CLK_SOURCE_AUXILIARY,
SYS_CLK_SOURCE_FRC_BY_DIV,
SYS_CLK_SOURCE_FRC_BY_16,
SYS_CLK_SOURCE_LPRC,
SYS_CLK_SOURCE_SECONDARY,
SYS_CLK_SOURCE_PRIMARY_USBPLL,
SYS_CLK_SOURCE_PRIMARY_SYSPLL,
SYS_CLK_SOURCE_PRIMARY,
SYS_CLK_SOURCE_FRC_SYSPLL,
SYS_CLK_SOURCE_FRC
} SYS_CLK_SOURCE;
Description
Clock clocks enumeration
This enumeration lists all the available clock outputs. This is used by the SYS_CLK_ClockFrequencyGet and
SYS_CLK_ClockIsReady functions.
Members
Members Description
SYS_CLK_TOTAL_SOURCES This gives the total number of sources present
SYS_CLK_SOURCE_EXTERNAL Source of clock is external(from the pin) This is used only for the Reference clock.
SYS_CLK_SOURCE_USBPLL_OUT Source of clock is output of USB PLL This is used only for the Reference clock.
SYS_CLK_SOURCE_SYSPLL_OUT Source of clock is the output of System PLL. This is used only for the Reference
clock.
SYS_CLK_SOURCE_PBCLK_OUT Source of clock is peripheral clock. This is used only for the Reference clock.
SYS_CLK_SOURCE_SYSCLK_OUT Source of clock is System clock. This is used for Peripheral clock and the
Reference clock.
SYS_CLK_SOURCE_AUXILIARY Source of clock is Auxiliary clock.
SYS_CLK_SOURCE_FRC_BY_DIV Source of clock is internal fast RC divided by the divisor configured in software.
This is used only for the System clock.
SYS_CLK_SOURCE_FRC_BY_16 Source of clock is internal fast RC divided by 16. This is used only for the System
clock.
SYS_CLK_SOURCE_LPRC Source of clock is internal low power RC. This is used for System clock and the
Reference clock.
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SYS_CLK_SOURCE_SECONDARY Source of clock is secondary oscillator. This is used for System clock and the
Reference clock.
SYS_CLK_SOURCE_PRIMARY_USBPLL Source of clock is primary oscillator multiplied by the USB PLL value and divided
by the divisor configured by software. This is used only for the USB clock
SYS_CLK_SOURCE_PRIMARY_SYSPLL Source of clock is primary oscillator multiplied by the System PLL value and
divided by the divisor configured by software. This is used for System clock and
the Reference clock.
SYS_CLK_SOURCE_PRIMARY Source of clock is primary oscillator. This is used for System clock, Reference
clock and the USB clock
SYS_CLK_SOURCE_FRC_SYSPLL Source of clock is internal fast RC multiplied by system PLL. This is used for
System clock and the Reference clock.
SYS_CLK_SOURCE_FRC Source of clock is internal fast RC This is used for System clock, Reference clock
and the USB clock
Remarks
'Clock output' means output from the clock source. Not all clock sources are available for all devices. Refer to the specific device
data sheet to determine the available clock sources.
5.7.2.6.4.5 CLK_PERIPH_BUS_MZ Enumeration
C
typedef enum {
CLK_PERIPH_BUS_1,
CLK_PERIPH_BUS_2,
CLK_PERIPH_BUS_3,
CLK_PERIPH_BUS_4,
CLK_PERIPH_BUS_5,
CLK_PERIPH_BUS_6,
CLK_PERIPH_BUS_7,
CLK_PERIPH_BUS_8
} CLK_PERIPH_BUS_MZ;
Description
Peripherals Clocks enumeration (PIC32MZ only)
This enumeration lists all of the available peripheral clocks. This is used by the SYS_CLK_ClockFrequencyGet function to return
the peripheral clock frequency to the caller.
Members
Members Description
CLK_PERIPH_BUS_6 not used
Remarks
None.
5.7.2.6.4.6 CLK_SOURCE_PERIPHERAL Enumeration
C
typedef enum {
SYS_CLK_SOURCE_SYSTEMCLK
} CLK_SOURCE_PERIPHERAL;
Description
Peripheral clock sources enumeration
This enumeration lists all the available peripheral clock sources. This is used by the SYS_CLK_ClockFrequencySet function.
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Members
Members Description
SYS_CLK_SOURCE_SYSTEMCLK Source of clock is system clock
Remarks
None.
5.7.2.7 Files
Files
Name Description
sys_clk.h API for the Clock System Service.
Description
5.7.2.7.1 sys_clk.h
Clock System Service Interface Definition
This file contains the interface definition for the Clock System Service. It provides a way to interact with the Clock subsystem to
manage the timing requests supported by the system.
Enumerations
Name Description
CLK_PERIPH_BUS_MZ Lists the available peripheral clocks.
CLK_SOURCE_PERIPHERAL Lists the available clock sources for the peripheral clock.
SYS_CLK_OUTPUT Lists the available clock outputs.
SYS_CLK_SOURCE Lists the available clock outputs.
Functions
Name Description
SYS_CLK_ClockFailureCallbackRegister Allows registration of a call back function that will be triggered on a clock
failure.
SYS_CLK_ClockFrequencyGet Gets the selected clock frequency in Hz.
SYS_CLK_ClockFrequencySet Configures the clock multiplier and divisor values.
SYS_CLK_ClockIsReady Checks whether the selected clock output is stable and ready to use.
SYS_CLK_FRCTune This function is used for direct value based FRC oscillator tuning.
SYS_CLK_FRCTuningSet Starts the FRC tuning.
SYS_CLK_Initialize Initializes hardware and internal data structure of the System Clock.
SYS_CLK_MZPeriphBusFreqGet Gets the selected peripheral clock frequency in Hz (PIC32MZ only).
Structures
Name Description
SYS_CLK_FRCTUNING_DATA Defines the data required for tuning the FRC Oscillator.
SYS_CLK_INIT Defines the data required to initialize the Oscillator for the Clock System Service.
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File Name
sys_clk.h
Company
Microchip Technology Inc.
5.7.3 Device Control System Service Library
5.7.3.1 Introduction
Device Control System Service Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Device Control System Service Library that is available on the Microchip family
of PIC32 microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module
without the necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller
variant to another.
Description
The Device Control System Service provides the developer a simple API to configure their device for maximum performance. It
does this by minimizing the number of clock cycles required to fetch instructions and data from Program Flash Memory (PFM),
and SRAM. For PIC32MX devices, it also sets the peripheral clock bus to the fastest speed available for the current system clock
frequency.
5.7.3.2 Release Notes
MPLAB Harmony Version: v0.70b Device Control System Service Library Version : 0.1 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.7.3.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.7.3.4 Using the Library
This topic describes the basic architecture of the Device Control System Service Library and provides information and examples
on how to use it.
Interface Header File: sys_devcon.h
The interface to the Device Control System Service library is defined in the "sys_devcon.h" header file. This file is included by the
"system.h" file. Any C language source (.c) file that uses the Device Control System Service library should include "system.h".
Library File:
The Device Control System Service library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the System Service interacts with the framework.
5.7.3.4.1 Abstraction Model
This topic provides a description of the software abstraction for the Device Control System Service.
Description
Device Control Software Abstraction Block Diagram
The Device Control System Service configures the device for maximum performance given the current system clock speed. The
system clock is retrieved using the System Clock service when the Device Control service is initialized. For this reason, the
System Clock Service must be initialized prior to the Device Control Service.
The Device Control Service increases performance by:
• Minimizing the number of wait states inserted in an instruction fetch from Program Flash Memory (PFM).
• Minimizing the number of wait states inserted in a CPU access to Data RAM Memory (DRM) (PIC32MX only).
• Enabling the prefetch logic in the Prefetch Cache module.
• Setting the peripheral bus clock to the maximum speed (PIC32MX only).
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5.7.3.4.2 Library Overview
Refer to the section System Services Overview for how the system services operates in a system.
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Device Control module.
Library Interface Section Description
System Interaction Functions Provides system module APIs. Device initialization, de-initialization,
re-initialization and status functions.
Core Functionality Configures Device based on current system clock
5.7.3.4.3 How the Library Works
5.7.3.4.3.1 System Interaction
Initialization and Reinitialization
Initialization of the Device Control System Service initializes an internal data structure that stores the current system clock
frequency. Any time the system clock is changed, the Device Control system service should be reinitialized.
The system clock is read using the Clock System Service. Therefore, the Clock System Service must be initialized prior to
initializing the Device Control System Service.
The Device Control Status and Tasks routines are provided as stubs for future enhancement. They are not currently required for
this system service.
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5.7.3.4.3.2 Core Functionality
The Device Control System Service currently provides a single API to configure the device for maximum performance. It uses
the current clock frequency stored in an internal data structure to tune the wait states, enable the prefetch buffer and set the
peripheral clock (PIC32MX only) for maximum performance. The API takes no arguments and returns void.
SYS_DEVCON_PerformanceConfig()
5.7.3.5 Configuring the Library
Macros
Name Description
SYS_DEVCON_PIC32MX_MAX_PB_FREQ This is macro SYS_DEVCON_PIC32MX_MAX_PB_FREQ.
SYS_DEVCON_PRIMARY_CLOCK This is macro SYS_DEVCON_PRIMARY_CLOCK.
SYS_DEVCON_SYSTEM_CLOCK This is macro SYS_DEVCON_SYSTEM_CLOCK.
Description
The configuration of the Device Control system service is based on the file sys_config.h
This header file contains the configuration selection for the Device Control system service. Based on the selections made, the
Device Control system service will support or not support selected features. These configuration settings will apply to all
instances of the Device Control system service.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.7.3.5.1 Others
Three configuration options exist for the Device Control System Service.
SYS_DEVCON_PRIMARY_CLOCK: Primary oscillator frequency. Not currently used.
SYS_DEVCON_SYSTEM_CLOCK: System clock frequency. Retrieved using the System Clock Service. Not currently used.
SYS_DEVCON_PIC32MX_MAX_PB_FREQ: Maximum peripheral bus clock frequency. Required for PIC32MX devices only.
5.7.3.5.2 Examples - Sample Functionality
/* Primary Oscillator clock frequency
Summary:
Sets up the Primary Oscillator clock frequency.
Description:
This macro sets up the Primary Oscillator clock frequency.
Remarks:
None.
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*/
#define SYS_DEVCON_PRIMARY_CLOCK 24000000L
// *****************************************************************************
/* System Clock frequency
Summary:
Sets up the System clock frequency.
Description:
This macro sets up the System clock frequency.
Remarks:
None.
*/
#define SYS_DEVCON_SYSTEM_CLOCK 200000000L
// *****************************************************************************
/* PIC32MX Max Peripheral Bus Frequency
Summary:
Defines the maximum peripheral bus clock frequency for PIC32MX.
Description:
This macro defines the maximum peripheral bus clock frequency for PIC32MX.
Remarks:
None.
*/
#define SYS_DEVCON_PIC32MX_MAX_PB_FREQ 80000000L
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5.7.3.5.3 SYS_DEVCON_PIC32MX_MAX_PB_FREQ Macro
C
#define SYS_DEVCON_PIC32MX_MAX_PB_FREQ 80000000L
Description
This is macro SYS_DEVCON_PIC32MX_MAX_PB_FREQ.
5.7.3.5.4 SYS_DEVCON_PRIMARY_CLOCK Macro
C
#define SYS_DEVCON_PRIMARY_CLOCK 24000000L
Description
This is macro SYS_DEVCON_PRIMARY_CLOCK.
5.7.3.5.5 SYS_DEVCON_SYSTEM_CLOCK Macro
C
#define SYS_DEVCON_SYSTEM_CLOCK 200000000L
Description
This is macro SYS_DEVCON_SYSTEM_CLOCK.
5.7.3.6 Building the Library
This section list the files that are available in the \src of the Device Control System Service. It lists which files need to be included
in the build based on either a hardware feature present on the board or configuration option selected by the system.
sys_devcon.c
5.7.3.7 Library Interface
Data Types and Constants
Name Description
SYS_DEVCON_HANDLE Identifies a particular registered event instance.
SYS_DEVCON_INIT Identifies the system timer initialize structure.
SYS_DEVCON_INDEX_0 Device Control System Service index definitions.
System Interaction Functions
Name Description
SYS_DEVCON_Deinitialize Deinitializes the specific module instance of the DEVCON module
SYS_DEVCON_Initialize Initializes data for the instance of the Device Control module and opens the
specific module instance.
SYS_DEVCON_PerformanceConfig Configures the PFM wait states and prefetch (cache) module for maximum
performance.
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SYS_DEVCON_Reinitialize Reinitializes and refreshes the hardware for the instance of the Device
Control module.
SYS_DEVCON_Status Returns status of the specific instance of the Device Control module.
SYS_DEVCON_Tasks Maintains the system Device Control state machine.
SYS_Initialize Function that initializes all modules in the system.
Description
5.7.3.7.1 System Interaction Functions
5.7.3.7.1.1 SYS_DEVCON_Deinitialize Function
C
void SYS_DEVCON_Deinitialize(
SYS_MODULE_OBJ object
);
Description
This function deinitializes the specific module instance disabling its operation (and any hardware for driver modules). Resets all
of the internal data structures and fields for the specified instance to the default settings.
Preconditions
The SYS_DEVCON_Initialize function should have been called before calling this function.
Parameters
Parameters Description
object SYS DEVCON object handle, returned from SYS_DEVCON_Initialize
Returns
None.
Example
SYS_MODULE_OBJ object; // Returned from SYS_DEVCON_Initialize
SYS_STATUS status;
SYS_DEVCON_Deinitialize (object);
status = SYS_DEVCON_Status (object);
if (SYS_MODULE_DEINITIALIZED == status)
{
// Check again later if you need to know
// when the SYS DEVCON is deinitialized.
}
Remarks: Once the Initialize operation has been called, the Deinitialize
operation must be called before the Initialize operation can be called
again.
5.7.3.7.1.2 SYS_DEVCON_Initialize Function
C
SYS_MODULE_OBJ SYS_DEVCON_Initialize(
const SYS_MODULE_INDEX index,
const SYS_MODULE_INIT * const init
);
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Description
This function initializes the instance of the Device Control module, using the specified initialization data. It also initializes any
internal data structures.
Preconditions
None.
Parameters
Parameters Description
index Index for the instance to be initialized
init Pointer to a data structure containing any data necessary to initialize the Device
Control module. This pointer may be null if no data is required because static
overrides have been provided.
Returns
If successful, returns a valid handle to an object. Otherwise, it returns SYS_MODULE_OBJ_INVALID. The returned object must
be passed as argument to SYS_DEVCON_Reinitialize, SYS_DEVCON_Deinitialize, SYS_DEVCON_Tasks and
SYS_DEVCON_Status routines.
Example
SYS_MODULE_OBJ objectHandle;
SYS_DEVCON_INIT initConfig;
// Populate the devcon initialization structure
initConfig.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
initConfig.sysOscFreq = CONFIG_OSC_FREQ;
objectHandle = SYS_DEVCON_Initialize (SYS_DEVCON_INDEX_0, (SYS_MODULE_INIT*)&initConfig);
if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
Remarks: This routine should only be called once during system initialization
unless SYS_DEVCON_Deinitialize is first called to deinitialize the device
instance before reinitializing it. If the system was already initialized
it safely returns without causing any disturbance.
5.7.3.7.1.3 SYS_DEVCON_PerformanceConfig Function
C
void SYS_DEVCON_PerformanceConfig();
Description
This function configures the PFM wait states and prefetch (cache) module for maximum performance.
Preconditions
The SYS_DEVCON_Initialize function should have been called before calling this function.
Returns
None.
Example
SYS_DEVCON_PerformanceConfig();
Remarks: None.
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5.7.3.7.1.4 SYS_DEVCON_Reinitialize Function
C
void SYS_DEVCON_Reinitialize(
SYS_MODULE_OBJ object,
const SYS_MODULE_INIT * const init
);
Description
This function reinitializes the instance of the Device Control module using the supplied data. It modifies the internal data
structure.
Preconditions
The SYS_DEVCON_Initialize function should have been called before calling this function.
Parameters
Parameters Description
object Identifies the SYS DEVCON Object returned by the Initialize interface
init Pointer to the data structure containing any data necessary to initialize the
hardware
Returns
None
Example
SYS_MODULE_OBJ objectHandle;
SYS_DEVCON_INIT initConfig;
SYS_STATUS devconStatus;
// Populate the timer initialization structure
initConfig.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
initConfig.sysOscFreq = CONFIG_OSC_FREQ;
SYS_DEVCON_Reinitialize (objectHandle, (SYS_MODULE_INIT*)&initConfig);
devconStatus = SYS_DEVCON_Status (object);
if (SYS_STATUS_ERROR >= devconStatus)
{
// Handle error
}
Remarks: This operation uses the same initialization data structure as the
SYS_DEVCON_Initialize operation. This operation can be used to change the
power state of a DEVCON module. This function can be called multiple times
to reinitialize the module. This operation uses the same initialization
data structure as the Initialize operation. This operation can also be
used to refresh the hardware registers as defined by the initialization
data.
5.7.3.7.1.5 SYS_DEVCON_Status Function
C
SYS_STATUS SYS_DEVCON_Status(
SYS_MODULE_OBJ object
);
Description
This function returns the status of the specific module instance disabling its operation (and any hardware for driver modules).
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Preconditions
The SYS_DEVCON_Initialize function should have been called before calling this function.
Parameters
Parameters Description
object SYS DEVCON object handle, returned from SYS_DEVCON_Initialize
Returns
SYS_STATUS_READY - Indicates that any previous operations have succeeded and the module is ready for additional
operations.
Remarks
Any value greater than SYS_STATUS_READY is also a normal running state in which the driver is ready to accept new
operations
SYS_STATUS_BUSY - Indicates that the driver is busy with a previous system level operation and cannot start another
SYS_STATUS_ERROR - Indicates that the driver is in an error state
Any value less than SYS_STATUS_ERROR is also an error state.
SYS_MODULE_DEINITIALIZED - Indicates that the driver has been de-initialized
This value is less than SYS_STATUS_ERROR.
Example
SYS_MODULE_OBJ object; // Returned from SYS_DEVCON_Initialize
SYS_STATUS tmrStatus;
devconStatus = SYS_DEVCON_Status (object);
else if (SYS_STATUS_ERROR >= devconStatus)
{
// Handle error
}
Remarks: Once the Initialize operation has been called, the Deinitialize
operation must be called before the Initialize operation can be called
again.
5.7.3.7.1.6 SYS_DEVCON_Tasks Function
C
void SYS_DEVCON_Tasks(
SYS_MODULE_OBJ object
);
Description
This function is used to maintain the system Device Control internal state machine.
Preconditions
The SYS_DEVCON_Initialize function must have been called for the specified DEVCON driver instance.
Parameters
Parameters Description
object SYS DEVCON object handle, returned from SYS_DEVCON_Initialize
Returns
None
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Remarks
This function is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
apropriate raw ISR.
Example
SYS_MODULE_OBJ object; // Returned from SYS_DEVCON_Initialize
while (true)
{
SYS_DEVCON_Tasks (object);
// Do other tasks
}
5.7.3.7.1.7 SYS_Initialize Function
C
void SYS_Initialize(
void * data
);
Description
System Initialization Function
This function initializes all modules in the system, including any drivers, services, middleware, and applications.
Preconditions
None.
Parameters
Parameters Description
data Pointer to the data structure containing any data necessary to initialize the
module. This pointer may be null if no data is required and default initialization is
to be used.
Returns
None.
Remarks
This function will only be called once, after system reset.
Example
SYS_Initialize ( NULL );
while ( true )
{
SYS_Tasks ( );
}
5.7.3.7.2 Data Types and Constants
5.7.3.7.2.1 SYS_DEVCON_HANDLE Type
C
typedef int8_t SYS_DEVCON_HANDLE;
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Description
SYS DEVCON Handle
This event handle identifies a registered instance of an event. Every time the application that tries to access the paramateres
with respect to a particular event, shall used this event handle to refer to that event.
Remarks
None.
5.7.3.7.2.2 SYS_DEVCON_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
uint32_t sysOscFreq;
} SYS_DEVCON_INIT;
Description
SYS DEVCON Initialize structure
This structure identifies the system timer initialize structure.
Members
Members Description
SYS_MODULE_INIT moduleInit; System module initialization
uint32_t sysOscFreq; System Oscillator Frequency in Hertz
Remarks
None.
5.7.3.7.2.3 SYS_DEVCON_INDEX_0 Macro
C
#define SYS_DEVCON_INDEX_0 0
Description
SYS Device Control Module Index Numbers
These constants provide Device Control System Service index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals.
5.7.3.8 Files
Files
Name Description
sys_devcon.h Device Control System Service interface definition.
sys_devcon_config.h Device Control System Service configuration templates.
Description
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5.7.3.8.1 sys_devcon.h
Device Control System Service Interface Definition
This file contains the interface definition for the Device Control System Service. It provides a way to interact with the Device
Control subsystem to manage the device control requests supported by the system.
Functions
Name Description
SYS_DEVCON_Deinitialize Deinitializes the specific module instance of the DEVCON module
SYS_DEVCON_Initialize Initializes data for the instance of the Device Control module and opens the
specific module instance.
SYS_DEVCON_PerformanceConfig Configures the PFM wait states and prefetch (cache) module for maximum
performance.
SYS_DEVCON_Reinitialize Reinitializes and refreshes the hardware for the instance of the Device
Control module.
SYS_DEVCON_Status Returns status of the specific instance of the Device Control module.
SYS_DEVCON_Tasks Maintains the system Device Control state machine.
Macros
Name Description
SYS_DEVCON_INDEX_0 Device Control System Service index definitions.
Structures
Name Description
SYS_DEVCON_INIT Identifies the system timer initialize structure.
Types
Name Description
SYS_DEVCON_HANDLE Identifies a particular registered event instance.
File Name
sys_devcon.h
Company
Microchip Technology Inc.
5.7.3.8.2 sys_devcon_config.h
Device Control System Service Configuration Templates
This file contains constants to configure the Device Control System Service.
Macros
Name Description
SYS_DEVCON_PIC32MX_MAX_PB_FREQ This is macro SYS_DEVCON_PIC32MX_MAX_PB_FREQ.
SYS_DEVCON_PRIMARY_CLOCK This is macro SYS_DEVCON_PRIMARY_CLOCK.
SYS_DEVCON_SYSTEM_CLOCK This is macro SYS_DEVCON_SYSTEM_CLOCK.
File Name
sys_devcon_config_template.h
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Company
Microchip Technology Inc.
5.7.4 File System Service Library
5.7.4.1 Introduction
Introduction to the MPLAB Harmony File System (FS).
Description
The MPLAB Harmony File System (FS) provides file system services to MPLAB Harmony based applications. Figure 1 shows
the architecture of the File System Service.
Figure 1: File System Architecture
The File System Service provides an application programming interface (API) through which a utility or user program requests
services of a file system. Some file system APIs may also include interfaces for maintenance operations, such as creating or
initializing a file system and verifying the file system for integrity.
The File System service is really a framework designed to support multiple file systems (native file system) and multiple media in
the same application. Examples of native file systems are FAT12, FAT32, MPFS, and JFS, among others. Each of these native
file systems have a common set of APIs that can be used to access the files of that particular native file system.
The File System Service abstracts the native file system calls and provides a common interface to the user/application layer. For
example, while the application layer requests for a file read or write from a disk, due to the presence of the this abstraction, the
application need not be bothered about the native file system implemented on that disk. Instead, the application can call the
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read/write API of the File System, which in turn translates to the read/write command of the native file system used on the
required disk.
This simplifies the implementation of the higher application layer and also provides a mechanism to add more native file system
to the File System framework in the future.
Note: Throughout this document, "File System Service" and "sys_fs" are used interchangeably.
5.7.4.2 Release Notes
MPLAB Harmony Version: v0.70b File System Service Library Version : 0.1 Release Date: 18Nov2013
New in This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
• Supports multiple file systems. Presently, FAT FS and MPFS are the two native file systems that are supported.
• Supports multiple media.
• Supports both static media (SD card, non-volatile memory, etc.) and dynamic media (mass storage device).
• Supports long file names for files.
• Supports media with multiple partitions.
Known Issues:
• Does not work in MIPS16 mode.
• For some SD cards, reading or writing data of more than 1 sector (512Bytes) causes random junk characters to be inserted in
the data. Hence, it is advised to read or write 512Bytes or lesser at a time.
• SD cards (size 2 GB or less) do not work with the present version of File system. Only SDHC cards work.
• Hardware switch-based write protection feature is not implemented for SD cards.
• Since the FS demonstration codes do not have an integrated real-time clock module, the time is set internally to a fixed value
of 9th August 2013, 3:06pm (in the file diskio.c).
• Not all functions (such as directory related functions) from native FAT FS are supported in the present version of the MPLAB
Harmony FS. For the list of implemented functions, please refer to the Library Interface section.
• SD cards do not support dynamic card insertion. To use an SD card, the card has to be inserted before running the code
execution.
• Testing on multi-partitioned media was not carried out extensively.
5.7.4.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
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CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.7.4.4 Getting Started
This topic provides an introduction to the MPLAB Harmony File System.
Description
The MPLAB Harmony File System (FS) provides embedded application developers with a file system framework for retrieving
and storing data from various media.
The MPLAB Harmony file system is designed to support multiple file systems (native file systems) and multiple media at the
same time. Examples of native file systems are FAT12, FAT32, MPFS, and JFS, among others. Each of these native file
systems has a common set of APIs that can be used to access the files of that particular native file system. The FS is a part of
the MPLAB Harmony installation and is accompanied by demonstration applications that highlight usage. These demonstrations
can also be modified or updated to build custom applications.
FS features include the following:
• Support for multiple file system (FAT, MPFS)
• Supports multiple physical media (NVM, SD card)
• More physical media can be interfaced with the FS, once the driver is available for the media
• Modular and Layered architecture
5.7.4.4.1 Architecture
This topic describes the architecture of the MPLAB Harmony File System.
Description
The FS framework features a modular and layered architecture, as shown in Figure 1.
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Figure 1: FS Framework Architecture
As seen in Figure 1, the FS Framework consists of the following major blocks:
• The Driver for the physical media has to be included as a part of the FS Framework. This layer provides a low-level interface
to access the physical media. This layer also enables multiple instances of media. Examples of drivers are:
• NVM driver – To access files using NVM (Flash memory)
• SPI driver – To access files from SD card, which interfaces using the SPI peripheral
• The Media driver provides a mechanism to access the media as “sectors”. Sectors are the smallest storage element
accessed by a file system and are contiguous memory locations. Typically, each sector has 512 bytes. Depending on the
requirement, in some cases, the driver and media driver could be combined as one layer.
• The Media manager implements a disk and sector based media access mechanism. It also performs disk
allocated/deallocated on media attach/detach. Due to the implementation of this layer, the FS Framework can support multiple
disks.
• The Native file system implements support for the media file system format. Examples of native file systems are: FAT12,
FAT32, and MPFS, among other. At present, only the FAT and MPFS files systems are supported by the FS framework;
however, more native file systems can be included.
• The Virtual file system (or SYS_FS ) layer provides a file system independent file system operation interface. This layer
translates virtual file systems calls to native file system calls. Due to this layer, applications can now support multiple file
systems. Interfaces provided by this layer, but not limited to, include:
• SYS_FS_mount
• SYS_FS_open
• SYS_FS_read
• SYS_FS_write
• SYS_FS_close
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5.7.4.4.2 Application Interaction
This topic describes how an application must interact with the File System.
Description
The interaction of various layers is shown in Figure 1.
Figure 1: Application Interaction with FS Framework
In the process of using the FS Framework, the application must first mount the media drive for the FS Framework to access the
media. Unless the mounting process returns successfully, the application should continue trying to mount the drive. If the drive is
not attached, the mounting process will fail. In such a situation, the application should not proceed further unless the mounting is
success.
Figure 2: Application Mounts a Drive
Once the drive is mounted, the application code can then open the file from the drive with different attributes (such as read-only
or write). If the file open returns a valid handle, the application can proceed further. Otherwise, the application will enter an error
state. The reason for an invalid handle could be that the application was trying to read a file from the drive that does not exist.
Another reason for an invalid handle is when the application tries to write to a drive that is write-protected.
Once the file is opened, the valid file handle is further used to read/write data to the file. Once the required operation is
performed on the file, the file can then be closed by the application by passing the file handle. Figure 3 illustrates the process.
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Figure 3: Further File System Operations
5.7.4.4.3 Using the File System
This topic describes how to use the File System.
Description
Use the Available Library Demonstration Applications
The FS framework release package contains a set of demonstration applications that are representative of common scenario
(single/multi-media and single/multi-native file systems). These demonstrations can be easily modified to include
application-specific initialization and application logic. The application logic must be non-blocking and could be implemented as a
state machine.
• The application specific initialization can be called in the SYS_Initialize() function (in the sys_init.c file). The SYS_Initialize is
called when the device comes out of Power-on Reset (POR).
• The application logic can be called in the SYS_Tasks() function (in the sys_tasks.c file). The application logic can interact with
the FS layer by using relevant API calls, as provided in the APP_Tasks() (in the app.c file)
Building a FS Application from Scratch
In a case where the available demonstration applications do not meet the end application requirements, an application to use the
FS framework can be created by from scratch. Figure 1 shows a flowchart for the steps that need to be performed.
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Figure 1: Steps to create a FS Application
Step 1:
Create a MPLAB Project and add the required FS framework files to the project. The following files are needed to build the a FS
project
• system_config.h - This file should contain the compile time configuration macros for the Driver, Media Layer, and FS layer.
The file also contains the clock speed setting, which is set for the microcontroller.
• system_init.c – This file should contain the initial settings for each driver. It should also call the functions required to initialize
different drivers to be used by the FS.
• ff.c, diskio.c, mpfs.c, sys_fs.c, sys_fs_media_manager.c – These files are part of the FS, which must be included in the project
• sys_int_pic32.c and plib_int_pic32.c - These files implement the system interrupt service that is required by the FS
• sys_ports.c – If the FS is using a SD card as media, this file needs to be included (for Chip Select)
• Driver – The driver for media to be used by FS should also be included
• Application specific files - These file will implement the application logic
Step 2:
Since the MPLAB Harmony drivers included with the File System operate in interrupt mode, a driver Handler should be defined
as follows:
/* Use this for PIC32MX */
void __ISR ( _SPI1_VECTOR,ipl4 ) _InterruptHandler_SPI_stub ( void )
{
DRV_SPI_Tasks((SYS_MODULE_OBJ)appDrvObjects.drvSPIObject);
}
/* Use this for PIC32MZ */
void __ISR ( _SPI2_RX_VECTOR,ipl4 ) _InterruptHandler_SPI_RX_stub ( void )
{
DRV_SPI_Tasks((SYS_MODULE_OBJ)appDrvObjects.drvSPIObject);
}
void __ISR ( _SPI2_TX_VECTOR,ipl4 ) _InterruptHandler_SPI_TX_stub ( void )
{
DRV_SPI_Tasks((SYS_MODULE_OBJ)appDrvObjects.drvSPIObject);
}
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Step 3:
The application should create a while(1) loop that continuously updates the driver layer State Machine and the application state
machine. This requires the application state machine to be non-blocking.
/* This while(1) loop will continuously update the driver layer state machine and the
application state machine */
while(1)
{
/* Task routine for sys_fs */
SYS_FS_Tasks();
/* Call the SDCARD Task */
DRV_SDCARD_Tasks(appDrvObjects.drvSDCARDObject);
/* Call the application's tasks routine */
APP_Tasks ( );
}
Step 4:
If interrupt-based operation is needed, the interrupts need to be enabled first. The application should then initialize the driver
layer. Refer to the driver specific documents regarding usage.
/* Initialize the interrupt system */
SYS_INT_Initialize();
/* Initialize the global interrupts */
SYS_INT_Enable();
/* set priority for SPI interrupt source */
SYS_INT_VectorPrioritySet(INT_VECTOR_SPI1, INT_PRIORITY_LEVEL3);
/* set sub-priority for SPI interrupt source */
SYS_INT_VectorSubprioritySet(INT_VECTOR_SPI1, INT_SUBPRIORITY_LEVEL3);
/* Initialize the global interrupts */
SYS_INT_Enable();
/* Initialize the SPI driver */
appDrvObjects.drvSPIObject = DRV_SPI_Initialize(DRV_SPI_INDEX_0,
(SYS_MODULE_INIT *)&drvSPIInit);
/* Initialize the SDCARD driver*/
appDrvObjects.drvSDCARDObject = DRV_SDCARD_Initialize(DRV_SDCARD_INDEX_0,
(SYS_MODULE_INIT *)&drvSDCARDInit);
Step 5:
The application code can be implemented as a non-blocking state machine inside the APP_TASKS() function, as shown below
for an application to read a file and write the content into another newly created file.
The input file "TEST.JPG" is not provided with the release package. It could be any arbitrary JPEG file chosen by the user, and
then suitably renamed to "TEST.JPG". The reason for choosing a JPEG file for test purposes is that the duplicate file
"TEST1.JPG" created by the FS demonstration could be easily verified for correctness by inserting the SD card in the computer
and opening the "TEST1.JPG" file.
void APP_Tasks ( void )
{
/* The application task state machine */
switch(appData.state)
{
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case APP_MOUNT_DISK:
if(SYS_FS_Mount("/dev/mmcblka1", "/mnt/myDrive", FAT, 0, NULL) != 0)
{
/* The disk could not be mounted. Try
* mounting again untill success. */
appData.state = APP_MOUNT_DISK;
}
else
{
/* Mount was successful. Open a file.
* Let the switch case fall through. */
appData.state = APP_OPEN_FILE;
}
break;
case APP_OPEN_FILE:
appData.fileHandle = SYS_FS_FileOpen("/mnt/myDrive/TEST.JPG",
(FA_READ));
if(appData.fileHandle == SYS_FS_HANDLE_INVALID)
{
/* Could not open the file. Error out*/
appData.state = APP_ERROR;
}
else
{
appData.fileHandle1 = SYS_FS_FileOpen("/mnt/myDrive/TEST1.JPG",
(FA_WRITE|FA_CREATE_ALWAYS));
if(appData.fileHandle == SYS_FS_HANDLE_INVALID)
{
/* Could not open the file. Error out*/
appData.state = APP_ERROR;
}
else
{
/* Check the file to be read */
appData.state = APP_CHECK_FILE;
}
}
break;
case APP_CHECK_FILE:
/* check the size of file */
fileSize = SYS_FS_FileSize(appData.fileHandle);
/* since, we will read 512 bytes at a time, find the number of times, the read has
to be
performed */
sectorCounter = integralSector = (fileSize/512);
/* find the remaining bytes */
balanceSector = (fileSize%512);
appData.state = APP_READ_WRITE_TO_FILE;
break;
case APP_READ_WRITE_TO_FILE:
if(SYS_FS_FileRead((void *)appData.data, 512, appData.fileHandle) == -1)
{
/* There was an error while reading the file.
* Close the file and error out. */
SYS_FS_FileClose(appData.fileHandle);
appData.state = APP_ERROR;
}
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else if(SYS_FS_FileWrite((const void *)appData.data, 512, appData.fileHandle1) ==
-1)
{
/* Write was not successful. Close the file
* and error out.*/
SYS_FS_FileClose(appData.fileHandle1);
appData.state = APP_ERROR;
}
else
{
sectorCounter--;
/* if entire integral sectors are written, then write the balance sector*/
if(sectorCounter == 0)
{
if(SYS_FS_FileRead((void *)appData.data, balanceSector,
appData.fileHandle) == -1)
{
/* There was an error while reading the file.
* Close the file and error out. */
SYS_FS_FileClose(appData.fileHandle);
appData.state = APP_ERROR;
}
else if(SYS_FS_FileWrite((const void *)appData.data, balanceSector,
appData.fileHandle1) == -1)
{
/* Write was not successful. Close the file
* and error out.*/
SYS_FS_FileClose(appData.fileHandle1);
appData.state = APP_ERROR;
}
else
{
appData.state = APP_CLOSE_FILE;
}
}
}
break;
case APP_CLOSE_FILE:
/* Close both files */
SYS_FS_FileClose(appData.fileHandle);
SYS_FS_FileClose(appData.fileHandle1);
/* The test was successful. Lets idle. */
appData.state = APP_IDLE;
break;
case APP_IDLE:
/* The appliction comes here when the demo
* has completed successfully. Switch on
* green LED. */
BSP_SwitchONLED(LED_2);
break;
case APP_ERROR:
/* The appliction comes here when the demo
* has failed. Switch on the red LED.*/
BSP_SwitchONLED(LED_1);
break;
default:
break;
}
} //End of APP_Tasks
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5.7.4.5 Migration Guide
This section provides information for migrating an existing File System (FS) application that uses legacy MLA code to MPLAB
Harmony.
Description
The topics covered include:
• Initialization
• System Configuration
• Mounting a Volume
• Opening a File
• Reading a File
• Writing a File
• Closing a File
• File EOF
• File Tell
• File Seek
• SYS_FS_Tasks
In each topic, differences between the legacy MLA code and MPLAB Harmony are described and examples are provided to
assist with the migration.
5.7.4.5.1 Comparison of API Names
This topic tabulates the API names for MLA vs. the name for MPLAB Harmony.
Description
API Name in MLA API Name in MPLAB Harmony
N/A SYS_FS_Mount
N/A SYS_FS_Unmount
N/A SYS_FS_FileError
FSInit SYS_FS_Initialize
N/A SYS_FS_Tasks
Fsfclose SYS_FS_FileClose
Fsfeof SYS_FS_FileEOF
FSfread SYS_FS_FileRead
FSftell SYS_FS_FileTell
FSfwrite SYS_FS_FileWrite
N/A SYS_FS_FileSize
wFSfopen SYS_FS_FileOpen
N/A SYS_FS_FileStat
FSfseek SYS_FS_FileSeek
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5.7.4.5.2 Initialization
This topic describes the differences in initialization.
Description
MLA Initialization (Legacy code):
In legacy MLA code, the initialization involves modification of the header file "HardwareProfile.h". The header file has definitions
for the SPI modules used (SPI1 or SPI2), configuration for SPI module, clock frequency, pin mapping for SD card, and pin
remapping for SPI (SDI, SDO and SCLK pins). The following two images illustrate these modifications.
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Inside the main() function, the initialization of interrupts and the clock occurs in a series of function calls. Then, the media detect
function is called for the media used. Later, the FS init function is called, which internally performs the disk mount, and if the
mount process and FS initialization is successful, the functions returns as "1".
MPLAB Harmony Initialization:
In the case of MPLAB Harmony, the initialization is done by the sys_initialize() function, which is called from the main() function.
Inside the sys_initialize() function, the BSP, interrupt, clock, port remapping, driver initialization, FS initialization and
application-specific initialization is done. All initialization is done by calling specific system function calls, as shown in the
following image. For more information, refer to the demonstration code provided as a part of the MPLAB Harmony release
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package.
The SPI module selection and configuration of the SPI module is done through the SPI driver initialization structure. Similarly, the
selection of pins related to SD card functionality and the selection of the SPI clock frequency is done through the SD card driver
initialization structure. The initialization structures are passed as input parameters during driver initialization function calls. There
are no #define used, as was done in the case of legacy MLA code.
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Since MPLAB Harmony supports multiple file systems, there is a structure which needs to be defined and then passed as an
input parameter to the SYS_FS_Init() function.
5.7.4.5.3 System Configuration
This topic describes differences in system configuration.
Description
system_config.h file in MPLAB Harmony:
The file "system_config.h" contains the various system configurations required to run an application. Examples of system
configurations related to, but not limited to drivers are:
• SPI driver configuration: such as DRV_SPI_INSTANCES_NUMBER, DRV_SPI_CLIENTS_NUMBER,
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DRV_SPI_INTERRUPT_MODE, DRV_SPI_BUFFER_SIZE, etc.
• SD Card driver configuration: such as DRV_SDCARD_INSTANCES_NUMBER, DRV_SDCARD_CLIENTS_NUMBER,
DRV_SDCARD_QUEUE_POOL_SIZE, etc.
These configurations are required to configure the drivers used for the FS. Since the driver concept was not present in the
legacy MLA code, this is a new addition to MPLAB Harmony. To get detailed information about each of the configuration
parameter, please refer to the driver help.
Media manager configuration:
• SYS_FS_MEDIA_NUMBER - Number of media that will be used in the application. For example, if the application uses SD
card and Mass storage device the SYS_FS_MEDIA_NUMBER should be defined as 2.
• SYS_FS_VOLUME_NUMBER - Number of volumes that will be used in the application. MPLAB Harmony supports
multi-partitioned media. If the application uses a SD card that has three partitions and a Mass storage device, which has one
partition, the SYS_FS_VOLUME_NUMBER should be defined as 4.
• Clock related configurations are present in the file, which are used to set the clock for the device
File system related configuration:
• SYS_FS_MAX_FILE_SYSTEM_TYPE - Number of native file system that will be used in the application. MPLAB Harmony
supports multiple native file systems. If the application uses two file systems, FAT FS and MPFS2,
SYS_FS_MAX_FILE_SYSTEM_TYPE should be defined as 2.
• SYS_FS_MAX_FILES - Maximum number of files that will be opened by the application at a time
• Other application-specific configuration settings
SYS_Tasks() in MPLAB Harmony:
In the case of MPLAB Harmony, certain tasks need to be executed periodically. These tasks are executed from a common
function called SYS_Tasks(), which is in turn called from the main loop (while(1)) loop. While the concept of running certain
functions from the main loop is not new, the legacy MLA demonstration code did not have any functions that had to run from the
main loop.However, in case of MPLAB Harmony, it is mandatory that certain tasks should be running periodically from the main
loop.
In the case of the FS application, tasks that have to run from SYS_Tasks() function are:
• SYS_FS_Tasks() - This task maintains the working of the SYS_FS layer and other file system related layers. It is extremely
essential that this function runs periodically from the SYS_Tasks() function.
• Driver task - Consider a case where the FS application uses a SD card -- there is no hardware module that controls the SD
card. In such a case, the task routine for the SD card must run from SYS_Tasks(). This is required so that the internal driver
mechanism for the SD card continues working.
• Any other application related task
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5.7.4.5.4 Mounting a Volume
This topic describes differences when mounting a volume.
Description
Mounting a Volume in MLA vs. MPLAB Harmony:
In case of MLA, the complete mounting of a volume was achieved by calling the two functions, MDD_MediaDetect() and FSInit(),
until the function returns success. The features of mounting a volume in MLA were:
• There are two functions that completely achieve the mounting process
• Both functions were of input type as "void" (no input argument)
• Both functions were called in blocking mode
In the case of MPLAB Harmony, the mounting of a volume is achieved by calling the SYS_FS_Mount() function, until the function
returns success. The features of mounting a volume in MPLAB Harmony are:
• SYS_FS_Mount() function includes both media detection and mounting the volume. Please note that, MPLAB Harmony FS
still needs the function SYS_FS_Initialize() to be called during system initialization. Though the name SYS_FS_Initialize()
seems similar to the MLA function FSInit(), the task achieved by calling these functions are very different.
• SYS_FS_Initialize() (MPLAB Harmony function) - Just does the initialization of SYS_FS layer. It does not do any mounting
of volumes.
• FSInit() (MLA function) - Did the initialization of FS and also did mount the disk.
• SYS_FS_Mount() function accepts input parameter such as devName, mntName, fileSystemType etc. To know each of the
parameter in detail, pleas refer to the documentation of the SYS_FS_Mount() function.
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• SYS_FS_Mount() has to be running in a non-blocking mode. The following image shows an application where
SYS_FS_Mount() is called from the state machine implementation. This is required as the implementation of the state
machine allows the SYS_Tasks() function to be run periodically. This is quite different from the earlier implementations of MLA.
5.7.4.5.5 Opening a File
This topic describes differences when opening a file.
Description
Opening a file in MLA vs. MPLAB Harmony:
Opening a file remains similar for both MLA and MPLAB Harmony. However, a critical difference in MPLAB Harmony is that,
while opening the file, the complete path of the file must be specified. In addition, the path must be preceded by the string
"/mnt/". The complete path is required because the MPLAB Harmony FS implements a multi-partition media support. Therefore,
the file path should include the name of volume (assigned media partition), and from where the file is to be opened. For more
details, please refer to the documentation of the SYS_FS_FileOpen() function. The following two figures illustrate opening a file
in MLA vs. MPLAB Harmony.
In case of MLA, the error in opening a file was indicated by the file open function returning a NULL, while, in MPLAB harmony,
the file open returns SYS_FS_HANDLE_INVALID.
Figure 1: Opening a File in MLA
Figure 2: Opening a File in MPLAB Harmony
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5.7.4.5.6 Reading a File
This topic describes the differences between legacy MLA code for FS and MPLAB Harmony FS, while reading a file.
Description
Reading a file in MLA vs. MPLAB Harmony:
Reading a file remains similar for both MLA and MPLAB Harmony, as depicted in the screen shots below. The smaller
differences are that, the name of the function to read the file is different, the order of parameters passed are different and
MPLAB Harmony only takes 3 parameters. The MPLAB Harmony function only enables byte based access.
Though, both MLA and MPLAB harmony file read functions returns the number of bytes read, the MPLAB Harmony functions
also returns “-1” if there were any errors while reading the file.
Figure: Reading a File in MLA
Figure: Reading a File in MPLAB Harmony
5.7.4.5.7 Writing a File
This topic describes the differences between legacy MLA code for FS and MPLAB Harmony FS, while writing to a file.
Description
Writing to a file in MLA vs. MPLAB Harmony:
Writing to a file remains similar for both MLA and MPLAB Harmony, as depicted in the screen shots below. The smaller
differences are that, the name of the function to write to the file is different, the order of parameters passed are different and
MPLAB Harmony only takes 3 parameters. The MPLAB Harmony function only enables byte based access.
Though, both MLA and MPLAB harmony file read functions returns the number of bytes written, the MPLAB Harmony functions
also returns “-1” if there were any errors while writing to the file.
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Figure: Writing to a File in MLA
Figure: Writing to a File in MPLAB Harmony
5.7.4.5.8 Closing a File
This topic describes the differences between legacy MLA code for FS and MPLAB Harmony FS, while closing a file.
Description
Closing a file in MLA vs. MPLAB Harmony:
Closing a file remains similar for both MLA and MPLAB Harmony, as depicted in the screen shots below. The smaller difference
is that, the name of the function is different.
Figure: Closing a File in MLA
Figure: Closing a File in MPLAB Harmony
5.7.4.5.9 File EOF
This topic describes the differences between legacy MLA code for FS and MPLAB Harmony FS, while checking for end of file.
Description
Checking for EOF in MLA vs. MPLAB Harmony:
The EOF function remains similar for both MLA and MPLAB Harmony, as depicted in the screen shots below. The smaller
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difference is that, the name of the function is different.
Figure: EOF in MLA
Figure: EOF in MPLAB Harmony
5.7.4.5.10 File Tell
This topic describes the differences between legacy MLA code for FS and MPLAB Harmony FS, while checking for file pointer
(tell).
Description
Checking for file pointer (tell) in MLA vs. MPLAB Harmony:
The function to check for file pointer (tell) remains similar for both MLA and MPLAB Harmony, as depicted in the screen shots
below. The smaller difference is that, the name of the function is different.
Figure: Tell Function in MLA
Figure: Tell Function in MPLAB Harmony
5.7.4.5.11 File Seek
This topic describes the differences between legacy MLA code for FS and MPLAB Harmony FS, while performing a file seek.
Description
File seek in MLA vs. MPLAB Harmony:
The function to perform file seek remains similar for both MLA and MPLAB Harmony, as depicted in the screen shots below. The
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smaller difference is that, the name of the function is different.
Figure: File Seek in MLA
Figure: File Seek in MPLAB Harmony
5.7.4.5.12 SYS_FS_Tasks
This topic describes the differences between legacy MLA code for FS and MPLAB Harmony FS with respect to SYS_FS_Tasks()
function.
Description
SYS_FS_Tasks() in MLA vs. MPLAB Harmony:
The MPLAB Harmony needs the SYS_FS_Tasks() function to be running periodically from the SYS_Tasks() function. The MLA
code did not had any such function which had to be running periodically.
Figure: Running SYS_FS_Tasks() Function from SYS_Tasks()
5.7.4.6 Library Interface
Data Types and Constants
Name Description
SYS_FS_ERROR Lists the various error cases
SYS_FS_FILE_OPEN_ATTRIBUTES Lists the various attributes (modes) in which a file can be opened
SYS_FS_FILE_SEEK_CONTROL Lists the various modes of file seek
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SYS_FS_FILE_SYSTEM_TYPE Enumerated data type identifying native file systems supported.
SYS_FS_FSTAT The structure to obtain the status of a file.
SYS_FS_FUNCTIONS SYS FS Function signature structure for native file systems
SYS_FS_HANDLE This type defines the file handle.
SYS_FS_REGISTRATION_TABLE The sys_fs layer has to be initialized by passing this structure with suitably
initialized members.
SYS_FS_RESULT Lists the various results of a file operation
FAT_FS_MAX_LFN Lists the maximum length of file name during LFN selection
FAT_FS_MAX_SS Lists the definitions for FAT file system sector size.
FAT_FS_USE_LFN Lists the definitions for FAT file system LFN selection
SYS_FS_HANDLE_INVALID This definitions defines the SYS FS file invalid handle.
File Operation Functions
Name Description
SYS_FS_FileClose Close a file.
SYS_FS_FileEOF check handle status
SYS_FS_FileOpen Open a file
SYS_FS_FileRead Read specified bytes from a file
SYS_FS_FileSeek Move the file pointer.
SYS_FS_FileSize Returns the size of the file
SYS_FS_FileStat Get file status
SYS_FS_FileTell Obtains the file pointer position
SYS_FS_FileWrite Write on the file
SYS_FS_FileNameGet Reads the file name.
General Operation Functions
Name Description
SYS_FS_FileError check the type of error
SYS_FS_Initialize Initializes the File system Abstration Layer (sys_fs layer).
SYS_FS_Mount Mount filesystems
SYS_FS_Tasks Tasks for the sys_fs layer
SYS_FS_Unmount unmount filesystems
Description
This section describes the Application Programming Interface (API) functions of the File System.
5.7.4.6.1 File Operation Functions
5.7.4.6.1.1 SYS_FS_FileClose Function
C
SYS_FS_RESULT SYS_FS_FileClose(
SYS_FS_HANDLE handle
);
Description
The SYS_FS_FileClose() function closes an opened file
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Preconditions
A valid file handle must be obtained before closing a file.
Parameters
Parameters Description
handle A valid handle, which was obtained while opening the file.
Returns
If Success - SYS_FS_RES_SUCCESS
If Failure - SYS_FS_RES_FAILURE
The reason for failure could be retrieved with SYS_FS_Error
Remarks
None
Example
SYS_FS_HANDLE fileHandle;
fileHandle = SYS_FS_FileOpen("/mnt/myDrive/FILE.JPG",
(SYS_FS_FILE_OPEN_READ));
if(fileHandle != SYS_FS_HANDLE_INVALID)
{
// File open is successful
}
...
...
SYS_FS_FileClose(fileHandle);
5.7.4.6.1.2 SYS_FS_FileEOF Function
C
bool SYS_FS_FileEOF(
SYS_FS_HANDLE handle
);
Description
Checks whether or not the file position indicator is at the end of the file.
Preconditions
A valid file handle must be obtained before knowing a file eof.
Parameters
Parameters Description
handle file handle obtaind during file Open.
Returns
If Success -
When file pointer has not reached the end of file - false
When file pointer has reached the end of file - true
If Failure - false
The reason for failure could be retrieved with SYS_FS_Error
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Remarks
None
Example
SYS_FS_HANDLE fileHandle;
bool eof;
fileHandle = SYS_FS_FileOpen("/mnt/myDrive/FILE.JPG",
(SYS_FS_FILE_OPEN_READ));
if(fileHandle != SYS_FS_HANDLE_INVALID)
{
// File open is successful
}
...
...
eof = SYS_FS_FileEOF(fileHandle);
if(eof == false)
{
// could be not EOF or a failure
// Check the error state using SYS_FS_FileError
}
5.7.4.6.1.3 SYS_FS_FileOpen Function
C
SYS_FS_HANDLE SYS_FS_FileOpen(
const char* fname,
SYS_FS_FILE_OPEN_ATTRIBUTES attributes
);
Description
The SYS_FS_FileOpen opens a requested file in a specific mode (attaribute).
Preconditions
Prior to opening a file, the name of the volume on which the file resides should be known. Also, that volume should be already
mounted. While opening the file, the name of the volume is to be passed along with the file name.
Parameters
Parameters Description
path Path to the file along with the volume name. The string of volume and file name
has to be preceeded by "/mnt/". Also, the volume name and file name has to be
separated by a slash "/".
attributes Access mode of the file, of the type SYS_FS_FILE_OPEN_ATTRIBUTES
Returns
If Success - Valid handle will be returned
If Failure - Returned handle will be SYS_FS_HANDLE_INVALID
The reason for failure could be retrieved with SYS_FS_Error
Remarks
None
Example
SYS_FS_HANDLE fileHandle;
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fileHandle = SYS_FS_FileOpen("/mnt/myDrive/FILE.JPG",
(SYS_FS_FILE_OPEN_READ));
if(fileHandle != SYS_FS_HANDLE_INVALID)
{
// File open is successful
}
5.7.4.6.1.4 SYS_FS_FileRead Function
C
size_t SYS_FS_FileRead(
void * buf,
size_t nbyte,
SYS_FS_HANDLE handle
);
Description
The SYS_FS_FileRead() function shall attempt to read nbyte bytes from the file associated with the file handle into the buffer
pointed to by buf.
Preconditions
A valid file handle must be obtained before reading a file.
Parameters
Parameters Description
handle File handle obtained during file open.
buf Pointer to buffer into which data is read.
nbyte Number of bytes to be read
Returns
If Success - The number of bytes successfully read (0 or positive number)
If Failure - (-1)
The reason for failure could be retrieved with SYS_FS_Error
Remarks
None
Example
...
char buf[20];
size_t nbytes;
size_t bytes_read;
SYS_FS_HANDLE fd;
...
nbytes = sizeof(buf);
bytes_read = SYS_FS_FileRead(buf, nbytes, fd);
...
5.7.4.6.1.5 SYS_FS_FileSeek Function
C
int32_t SYS_FS_FileSeek(
SYS_FS_HANDLE fildes,
int32_t offset,
SYS_FS_FILE_SEEK_CONTROL whence
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);
Description
The SYS_FS_FileSeek() function shall set the file pointer for a open file associated with the file handle, as follows:
If whence is SYS_FS_SEEK_SET, the file offset shall be set to offset bytes from the begining.
If whence is SYS_FS_SEEK_CUR, the file offset shall be set to its current location plus offset.
If whence is SYS_FS_SEEK_END, the file offset shall be set to the size of the file plus offset. If SYS_FS_SEEK_END is
selected, then offset has to be a negative number, inorder for the file pointer to be valid.
Trying to move the file pointer using SYS_FS_FileSeek, beyond the range of file will only cause the pointer to be moved to the
last location of the file.
Preconditions
A valid file handle must be obtained before seeking a file.
Parameters
Parameters Description
handle A valid file handle obtained during file open.
offset The number of bytes which act as file offset. This value could be a positive or
negative value.
whence File seek control input of type SYS_FS_FILE_SEEK_CONTROL.
Returns
If Success - The number of bytes by which file pointer is moved (0 or positive number)
If Failure - (-1) If the choosen offset value was (-1), then the success or failure can be ascertained with SYS_FS_Error.
The reason for failure could be retrieved with SYS_FS_Error
Remarks
None
Example
SYS_FS_HANDLE fileHandle;
int status;
fileHandle = SYS_FS_FileOpen("/mnt/myDrive/FILE.JPG",
(SYS_FS_FILE_OPEN_READ));
if(fileHandle != SYS_FS_HANDLE_INVALID)
{
// File open is successful
}
...
...
status = SYS_FS_FileSeek(fileHandle, 5, SYS_FS_SEEK_CUR);
if((status != -1) && (status == 5))
{
// Success
}
5.7.4.6.1.6 SYS_FS_FileSize Function
C
int32_t SYS_FS_FileSize(
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SYS_FS_HANDLE handle
);
Description
Returns the size of the file as pointed by the handle.
Preconditions
A valid file handle must be obtained before knowing a file size.
Parameters
Parameters Description
handle File handle obtained during file Open.
Returns
If Success - file size
If Failure - (-1)
The reason for failure could be retrieved with SYS_FS_Error
Remarks
None
Example
SYS_FS_HANDLE fileHandle;
long fileSize;
fileHandle = SYS_FS_FileOpen("/mnt/myDrive/FILE.JPG",
(SYS_FS_FILE_OPEN_READ));
if(fileHandle != SYS_FS_HANDLE_INVALID)
{
// File open is successful
}
...
...
fileSize = SYS_FS_FileSize(fileHandle);
if(fileSize != -1)
{
// Success
}
5.7.4.6.1.7 SYS_FS_FileStat Function
C
SYS_FS_RESULT SYS_FS_FileStat(
const char* fname,
SYS_FS_FSTAT * buf
);
Description
The SYS_FS_FileStat() function shall obtain information about a file associated with the file name, and shall write it to the
structure pointed to by buf.
The buf argument is a pointer to a SYS_FS_FSTAT structure,into which information is placed concerning the file.
This function can read the status of file irrespective of a file is opened or not.
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Preconditions
Prior to opening a file, the name of the volume on which the file resides should be known. Also, that volume should be already
mounted. While opening the file, the name of the volume is to be passed along with the file name.
Parameters
Parameters Description
path Path to the file along with the volume name. The string of volume and file name
has to be preceeded by "/mnt/". Also, the volume name and file name has to be
separated by a slash "/".
buf pointer to SYS_FS_FSTAT structure.
Returns
If Success - SYS_FS_RES_SUCCESS
If Failure - SYS_FS_RES_FAILURE
The reason for failure could be retrieved with SYS_FS_Error
Remarks
None
Example
SYS_FS_fStat fileStat;
if(SYS_FS_FileStat("/mnt/myDrive/FILE.TXT", &fileStat) == SYS_FS_RES_SUCCESS)
{
// Successfully read the status of file "FILE.TXT"
}
5.7.4.6.1.8 SYS_FS_FileTell Function
C
int32_t SYS_FS_FileTell(
SYS_FS_HANDLE handle
);
Description
Obtains the current value of the file position indicator for the file, pointed to by handle.
Preconditions
A valid file handle must be obtained before performing a file tell.
Parameters
Parameters Description
handle File handle obtained during file Open.
Returns
If Success - current file position
If Failure - (-1)
The reason for failure could be retrieved with SYS_FS_Error
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Remarks
None
Example
SYS_FS_HANDLE fileHandle;
int32_t tell;
fileHandle = SYS_FS_FileOpen("/mnt/myDrive/FILE.JPG",
(SYS_FS_FILE_OPEN_READ));
if(fileHandle != SYS_FS_HANDLE_INVALID)
{
// File open is successful
}
...
...
tell = SYS_FS_FileTell(fileHandle);
if(tell != -1)
{
// Success
}
5.7.4.6.1.9 SYS_FS_FileWrite Function
C
size_t SYS_FS_FileWrite(
const void * buf,
size_t nbyte,
SYS_FS_HANDLE handle
);
Description
The SYS_FS_FileWrite() function shall attempt to write nbyte bytes from the buffer pointed to by buf to the file associated with
the file handle.
Preconditions
A valid file handle must be obtained before writing a file.
Parameters
Parameters Description
handle File handle obtained during file open.
buf Pointer to buffer from which data is to be written
nbyte Number of bytes to be written
Returns
If Success - The number of bytes successfully written (0 or positive number)
If Failure - (-1)
The reason for failure could be retrieved with SYS_FS_Error
Remarks
None
Example
...
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const char *buf = "Hello World";
size_t nbytes;
size_t bytes_written;
SYS_FS_HANDLE fd;
...
bytes_written = SYS_FS_FileWrite((const void *)buf, nbytes, fd);
...
5.7.4.6.1.10 SYS_FS_FileNameGet Function
C
bool SYS_FS_FileNameGet(
SYS_FS_HANDLE handle,
uint8_t* cName,
uint16_t wLen
);
Description
Reads the file name of a file that is already open.
Preconditions
The file handle referenced by handle is already open.
Parameters
Parameters Description
handle file handle obtaind during file Open.
cName where to store the name of the file.
wLen the maximum length of data to store in cName.
Returns
If Success -
The file name was successfully located - true
If Failure The file handle provided is not currently open - false
The reason for failure could be retrieved with SYS_FS_Error
Remarks
None
Example
SYS_FS_HANDLE fileHandle;
bool stat;
uint8_t fileName[255];
fileHandle = SYS_FS_FileOpen("/mnt/myDrive/FILE.JPG",
(SYS_FS_FILE_OPEN_READ));
if(fileHandle != SYS_FS_HANDLE_INVALID)
{
// File open is successful
}
...
...
stat = SYS_FS_FileNameGet(fileHandle, fileName, 8 );
if(stat == false)
{
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// file not located based on handle passed
// Check the error state using SYS_FS_FileError
}
5.7.4.6.2 General Operation Functions
5.7.4.6.2.1 SYS_FS_FileError Function
C
SYS_FS_ERROR SYS_FS_FileError();
Description
When a file system operation fails, the application can know the exact reason of failure by calling the SYS_FS_FileError.
Preconditions
This function has to be called immediately after a failure is observed while doing a file operation. Any subsequent failure will
overwrite the cause of pervious failure.
Returns
Error code of type SYS_FS_ERROR
Remarks
None
Example
SYS_FS_HANDLE fileHandle;
SYS_FS_ERROR err;
fileHandle = SYS_FS_FileOpen("/mnt/myDrive/FILE.JPG",
(SYS_FS_FILE_OPEN_READ));
if(fileHandle == SYS_FS_HANDLE_INVALID)
{
// If failure, now know the specific reason for failure
err = SYS_FS_FileError();
}
5.7.4.6.2.2 SYS_FS_Initialize Function
C
SYS_FS_RESULT SYS_FS_Initialize(
const void* initData
);
Description
Initializes the abstraction layer (sys_fs layer) and sets up the necessary parameters.
Preconditions
This is the first function to be called during usage of sys_fs. Calling other functions from sys_fs without initializing the sys_fs will
cause un-predictable behavior.
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Parameters
Parameters Description
initData The pointer to array of the type SYS_FS_REGISTRATION_TABLE, but type
casted to (const void *). The number of elements of array is decided by the
definition SYS_FS_MAX_FILE_SYSTEM_TYPE. If the application uses 1 file
system (say only FAT FS), then SYS_FS_MAX_FILE_SYSTEM_TYPE is defined
to be 1. Otherwise, if the application uses 2 file systems (say FAT FS and
MPFS2), then SYS_FS_MAX_FILE_SYSTEM_TYPE is defined to be 2. The
SYS_FS_MAX_FILE_SYSTEM_TYPE has to be defined in system_config.h file.
Returns
If Success - SYS_FS_RES_SUCCESS
If Failure - SYS_FS_RES_FAILURE
The reason for failure could be retrieved with SYS_FS_Error
Example
// This code snippet shows an example of how the
// SYS FS is initialized
// Only 1 file system is used
#define SYS_FS_MAX_FILE_SYSTEM_TYPE 1
// Functions pointer table for FAT FS
const SYS_FS_FUNCTIONS FatFsFunctions =
{
.mount = f_mount,
.unmount = f_unmount,
.open = f_open,
.read = f_read,
.write = f_write,
.close = f_close,
.seek = f_lseek,
.tell = f_tell,
.eof = f_eof,
.size = f_size,
.fstat = f_stat,
};
const SYS_FS_REGISTRATION_TABLE sysFSInit [ SYS_FS_MAX_FILE_SYSTEM_TYPE ] =
{
{
.nativeFileSystemType = FAT,
.nativeFileSystemFunctions = &FatFsFunctions
}
};
SYS_FS_Initialize( (const void *) sysFSInit );
5.7.4.6.2.3 SYS_FS_Mount Function
C
SYS_FS_RESULT SYS_FS_Mount(
const char * devName,
const char * mountName,
SYS_FS_FILE_SYSTEM_TYPE filesystemtype,
unsigned long mountflags,
const void * data
);
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Description
The mount command attaches the filesystem specified to a volume.
When a media (say, SD card or USB thumb drive) is attached to the system, the SYS_FS_Tasks() function needs to run atleast
8 times (for each partition), from the SYS_Tasks(), before the volume names are assigned to each partitions. Hence it is
mandatory that the SYS_FS_Tasks() is run periodically. Also, it is mandatory that the SYS_FS_Mount() function call from the
application code, is not blocking. The application code has to allow the SYS_FS_Tasks() to run periodically while calling the
SYS_FS_Mount function. If the SYS_FS_Mount() is called in a blocking mode, then the SYS_Tasks() never gets a chance to run
and hence, the media will not be analyzed and finally, the SYS_FS_Mount will never succed. This will result in a dead-lock.
There is no mechanism available for the application to know if the specified volume (devName) is really attached or not. The only
available possibilty is to keep trying to mount the volume (with the devname), untill success is achieved. It is prudent that the
application code implements a time out mechanism while trying to mount a volume (by calling SYS_FS_Mount). The trial for
mount should continue atleast 10 times before before assuming that the mount will never succedeed. This has to be done for
every new volume to be mounted.
The name standard of volume (devName) used in Harmony file system is as below: -
For NVM - "nvm" "media number" "volume number"
For SD card - "mmcblk" "media number" "volume number"
For MSD - "sd" "media number" "volume number"
Where, "media number" - a, b, c... depending upon number of media of certain type connected.
Where, "volume number" - 1, 2, 3... depending upon number of partitions in that media.
The convention for assigning names to volumes is given by an example: -
If an SD card (with 4 partitiona) is attached to the system, and assuming all 4 partitions are recognized, then there will be 4
devNames -- mmcblka1, mmcblka2, mmcblka3 and mmcblka4.
Subsequently, a NVM media is attached which has only 1 partition, then the devname will be -- nvma1.
Later, another SD card is attached to the system which has 1 partition, then the devname will be -- mmcblkb1.
Finally, there will be 6 volume names (or devNames), which is available for the application to be mounted and used for file
system.
Preconditions
The "devName" name for the volume has to be known. The file sytem type with which each of the volumes are formatted has to
be known. Trying to mount a volume with a file system which is different from what the volume is actually formatted, will cause
mounting failure.
Parameters
Parameters Description
devName The device name (name of volume) which needs to be mounted. The devName
has to be preceeded by the string "/dev/".
mountName Mount name for the device to be mounted. This is a name provided by the user. In
future, while accessing the mounted volume (say, during SYS_FS_FileOpen
operation), the mountName is used to refer the path for file. The mount name has
to be preceeded by the string "/mnt/"
filesystemtype native file system of SYS_FS_FILE_SYSTEM_TYPE type.
mountflags mounting control flags. This parameter is reserved for future enhancements.
Hence, always pass zero.
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data The data argument is interpreted by the different file systems. This parameter is
reserved for future enhancements. Hence, always pass NULL.
Returns
If Success - SYS_FS_RES_SUCCESS
If Failure - SYS_FS_RES_FAILURE
The reason for failure could be retrieved with SYS_FS_Error
Example
switch(appState)
{
case TRY_MOUNT:
if(SYS_FS_Mount("/dev/mmcblka1", "/mnt/myDrive", FAT, 0, NULL) !=
SYS_FS_RES_SUCCESS)
{
// Failure, hence try mouting again
}
else
{
// Mount was successful. Do further file operations
appState = DO_FURTHER_STUFFS;
}
break;
5.7.4.6.2.4 SYS_FS_Tasks Function
C
void SYS_FS_Tasks();
Description
This routine is used to run the varioius tasks and functionalities of sys_fs layer.
Preconditions
The SYS_FS_Initialize routine must have been called before running the tasks.
Returns
None
Remarks
This routine is not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks).
Example
void SYS_Tasks ( void )
{
SYS_FS_Tasks ();
// Do other tasks
}
5.7.4.6.2.5 SYS_FS_Unmount Function
C
SYS_FS_RESULT SYS_FS_Unmount(
const char * mountName
);
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Description
remove the attachment of the volume from the fil system
Preconditions
The volume name has to be know in order to pass as input to Unmount. The specified volume name to be unmounted should
have been already mounted.
Parameters
Parameters Description
mountName Mount name for the volume to be mounted. The mount name has to be preceeded
by the string "/mnt/".
Returns
If Success - SYS_FS_RES_SUCCESS
If Failure - SYS_FS_RES_FAILURE
The reason for failure could be retrieved with SYS_FS_Error
Example
if(SYS_FS_Unmount("/mnt/myDrive") != SYS_FS_RES_SUCCESS)
{
// Failure, hence try unmouting again
}
else
{
// Unmount was successful.
}
5.7.4.6.3 Data Types and Constants
5.7.4.6.3.1 SYS_FS_ERROR Enumeration
C
typedef enum {
SYS_FS_ERROR_OK = 0,
SYS_FS_ERROR_DISK_ERR,
SYS_FS_ERROR_INT_ERR,
SYS_FS_ERROR_NOT_READY,
SYS_FS_ERROR_NO_FILE,
SYS_FS_ERROR_NO_PATH,
SYS_FS_ERROR_INVALID_NAME,
SYS_FS_ERROR_DENIED,
SYS_FS_ERROR_EXIST,
SYS_FS_ERROR_INVALID_OBJECT,
SYS_FS_ERROR_WRITE_PROTECTED,
SYS_FS_ERROR_INVALID_DRIVE,
SYS_FS_ERROR_NOT_ENABLED,
SYS_FS_ERROR_NO_FILESYSTEM,
SYS_FS_ERROR_FORMAT_ABORTED,
SYS_FS_ERROR_TIMEOUT,
SYS_FS_ERROR_LOCKED,
SYS_FS_ERROR_NOT_ENOUGH_CORE,
SYS_FS_ERROR_TOO_MANY_OPEN_FILES,
SYS_FS_ERROR_INVALID_PARAMETER,
SYS_FS_ERROR_NOT_ENOUGH_FREE_VOLUME,
SYS_FS_ERROR_FS_NOT_SUPPORTED,
SYS_FS_ERROR_FS_NOT_MATCH_WITH_VOLUME,
SYS_FS_ERROR_NOT_SUPPORTED_IN_NATIVE_FS
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} SYS_FS_ERROR;
Description
File Error error enumeration
This enumeration lists the various error cases. When the application calls for a file system function which has a return type of
SYS_FS_RESULT and if the return value is SYS_FS_RES_FAILURE, the application can know the specific reason for failure by
calling the SYS_FS_FileError function. The return value of SYS_FS_FileError function will be one of the enumeration of the type
SYS_FS_ERROR.
Members
Members Description
SYS_FS_ERROR_OK = 0 Success
SYS_FS_ERROR_DISK_ERR (1) A hard error occurred in the low level disk I/O layer
SYS_FS_ERROR_INT_ERR (2) Assertion failed
SYS_FS_ERROR_NOT_READY (3) The physical drive cannot work
SYS_FS_ERROR_NO_FILE (4) Could not find the file
SYS_FS_ERROR_NO_PATH (5) Could not find the path
SYS_FS_ERROR_INVALID_NAME (6) The path name format is invalid
SYS_FS_ERROR_DENIED (7) Access denied due to prohibited access or directory full
SYS_FS_ERROR_EXIST (8) Access denied due to prohibited access
SYS_FS_ERROR_INVALID_OBJECT (9) The file/directory object is invalid
SYS_FS_ERROR_WRITE_PROTECTED (10) The physical drive is write protected
SYS_FS_ERROR_INVALID_DRIVE (11) The logical drive number is invalid
SYS_FS_ERROR_NOT_ENABLED (12) The volume has no work area
SYS_FS_ERROR_NO_FILESYSTEM (13) There is no valid volume
SYS_FS_ERROR_FORMAT_ABORTED (14) The Format() aborted due to any parameter error
SYS_FS_ERROR_TIMEOUT (15) Could not get a grant to access the volume within defined period
SYS_FS_ERROR_LOCKED (16) The operation is rejected according to the file sharing policy
SYS_FS_ERROR_NOT_ENOUGH_CORE (17) LFN working buffer could not be allocated
SYS_FS_ERROR_TOO_MANY_OPEN_FILES (18) Number of open files
SYS_FS_ERROR_INVALID_PARAMETER (19) Given parameter is invalid
SYS_FS_ERROR_NOT_ENOUGH_FREE_VOLUME (20) Too many mounts requested. Not enough free volume available
SYS_FS_ERROR_FS_NOT_SUPPORTED (21) Requested native file system is not supported
SYS_FS_ERROR_FS_NOT_MATCH_WITH_VOLUME (22) Requested native file system does not match the format of volume
SYS_FS_ERROR_NOT_SUPPORTED_IN_NATIVE_FS (23) Function not supported in native file system layer
5.7.4.6.3.2 SYS_FS_FILE_OPEN_ATTRIBUTES Enumeration
C
typedef enum {
SYS_FS_FILE_OPEN_READ = 0,
SYS_FS_FILE_OPEN_WRITE,
SYS_FS_FILE_OPEN_APPEND,
SYS_FS_FILE_OPEN_READ_PLUS,
SYS_FS_FILE_OPEN_WRITE_PLUS,
SYS_FS_FILE_OPEN_APPEND_PLUS
} SYS_FS_FILE_OPEN_ATTRIBUTES;
Description
File open attributes
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Lists the various attributes (modes) in which a file can be opened
Members
Members Description
SYS_FS_FILE_OPEN_READ = 0 reading the file = possible, if file exists.
reading the file = file open returns error, if file does not exist.
writing to the file = not possible. Write operation returns error
SYS_FS_FILE_OPEN_WRITE reading the file = not possble. Read operation returns error
writing to the file = possible. If file exists, write happens from the begining of the
file, overwriting the existing content of the file.
writing to the file = If file does not exist, a new file will be created and data will be
written into the newly created file.
SYS_FS_FILE_OPEN_APPEND reading the file = not possble. Read operation returns error
writing to the file = possible. If file exists, write happens from the end of the file,
preserving the existing content of the file.
writing to the file = If file does not exist, a new file will be created and data will be
written into the newly created file.
SYS_FS_FILE_OPEN_READ_PLUS reading the file = possible, if file exists.
reading the file = file open returns error, if file does not exist.
writing to the file = possible, if file exists, staring from the begining of the file
(overwriting).
writing to the file = file open returns error, if file does not exist.
SYS_FS_FILE_OPEN_WRITE_PLUS reading the file = possible, if file exists.
reading the file = If file does not exist, a new file will be created.
writing to the file = possible. If file exists, write happens from the begining of the
file, overwriting the existing content of the file.
writing to the file = If file does not exist, a new file will be created and data will be
written into the newly created file.
SYS_FS_FILE_OPEN_APPEND_PLUS reading the file = possible, if file exists.
reading the file = If file does not exist, a new file will be created.
writing to the file = possible. If file exists, write happens from the end of the file,
preserving the existing content of the file.
writing to the file = If file does not exist, a new file will be created and data will be
written into the newly created file.
5.7.4.6.3.3 SYS_FS_FILE_SEEK_CONTROL Enumeration
C
typedef enum {
SYS_FS_SEEK_SET,
SYS_FS_SEEK_CUR,
SYS_FS_SEEK_END
} SYS_FS_FILE_SEEK_CONTROL;
Description
File Seek control
This enumeration lists the various modes of file seek. When the application calls the SYS_FS_FileSeek function, it specifies the
kind of seek that needs to be performed. The enumeration lists the various modes of file seek.
Members
Members Description
SYS_FS_SEEK_SET The file offset shall be set to input number of bytes from the start
SYS_FS_SEEK_CUR The file offset shall be set to its current location plus input number of bytes
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SYS_FS_SEEK_END The file offset shall be set to the size of the file plus input number of bytes
Remarks
None.
5.7.4.6.3.4 SYS_FS_FILE_SYSTEM_TYPE Enumeration
C
typedef enum {
FAT,
MPFS2
} SYS_FS_FILE_SYSTEM_TYPE;
Description
File System type
These enumerated values are the possible native file system that can be supported by the SYS FS layer.
Members
Members Description
FAT FAT FS native File system
MPFS2 MPFS2 native File system
Remarks
None.
5.7.4.6.3.5 SYS_FS_FSTAT Structure
C
typedef struct {
uint32_t fsize;
uint16_t fdate;
uint16_t ftime;
uint8_t fattrib;
char fname[13];
char* lfname;
uint32_t lfsize;
} SYS_FS_FSTAT;
Description
SYS FS File status structure
This structure holds the various status of a file. The stucture is passed when SYS_FS_Stat function is called and after a
successful execution of the function, the members of this structure carries the file status.
Members
Members Description
uint32_t fsize; File size
uint16_t fdate; Last modified date
uint16_t ftime; Last modified time
uint8_t fattrib; Attribute
char fname[13]; Short file name (8.3 format)
char* lfname; Pointer to the LFN buffer
uint32_t lfsize; Size of LFN buffer in TCHAR
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Remarks
None.
5.7.4.6.3.6 SYS_FS_FUNCTIONS Structure
C
typedef struct {
int (* mount)(uint8_t vol);
int (* unmount)(uint8_t vol);
int (* open)(uintptr_t handle, const char* path, uint8_t mode);
int (* read)(uintptr_t fp, void* buff, uint32_t btr, uint32_t *br);
int (* write)(uintptr_t fp, const void* buff, uint32_t btw, uint32_t* bw);
int (* close)(uintptr_t fp);
int (* seek)(uintptr_t handle, uint32_t offset);
uint32_t (* tell)(uintptr_t handle);
bool (* eof)(uintptr_t handle);
uint32_t (* size)(uintptr_t handle);
int (* fstat)(const char* path, uintptr_t fno);
} SYS_FS_FUNCTIONS;
Description
SYS FS Function signature structure for native file systems
The SYS FS layer supports functions from each native file system layer. This structure specifies the signature for each function
from native file system (parameter that needs to be passed to each function and return type for each function). If a new native file
system is to be integrated with the SYS FS layer, the functions should follow the signature.
The structure of function pointer for 2 native file system -- FAT FS and MPFS2 is already provided in the respective source files
for the native file system. Hence the following structure is not immediately useful for the user. But the explanation for the
structure is still provided for advanced users who would wish to integrate a new native file system to the Harmony File system
framework.
Members
Members Description
int (* mount)(uint8_t vol); Function pointer of native file system for mounting a volume
int (* unmount)(uint8_t vol); Function pointer of native file system for unmounting a volume
int (* open)(uintptr_t handle, const char*
path, uint8_t mode);
Function pointer of native file system for opening a file
int (* read)(uintptr_t fp, void* buff, uint32_t
btr, uint32_t *br);
Function pointer of native file system for reading a file
int (* write)(uintptr_t fp, const void* buff,
uint32_t btw, uint32_t* bw);
Function pointer of native file system for writing to a file
int (* close)(uintptr_t fp); Function pointer of native file system for closing a file
int (* seek)(uintptr_t handle, uint32_t offset); Function pointer of native file system for moving the file pointer by a desired offset
uint32_t (* tell)(uintptr_t handle); Function pointer of native file system for finding the position of the file pointer
bool (* eof)(uintptr_t handle); Function pointer of native file system to check if the end of file is reached
uint32_t (* size)(uintptr_t handle); Function pointer of native file system to know the size of file
int (* fstat)(const char* path, uintptr_t fno); Function pointer of native file system to know the status of file
Remarks
None.
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5.7.4.6.3.7 SYS_FS_HANDLE Type
C
typedef uintptr_t SYS_FS_HANDLE;
Description
SYS FS File Handle
While the application code opens a file, a file handle is returned by the open function (on successful open). This type defines the
type of file handle.
Remarks
None.
5.7.4.6.3.8 SYS_FS_REGISTRATION_TABLE Structure
C
typedef struct {
SYS_FS_FILE_SYSTEM_TYPE nativeFileSystemType;
const SYS_FS_FUNCTIONS * nativeFileSystemFunctions;
} SYS_FS_REGISTRATION_TABLE;
Description
SYS_FS_REGISTRATION_TABLE structure
When the SYS FS layer is initialised, it has to know the type of native file system it has to support and the list of functions for
native file system. The members of this structure can be initialized with suitable values and then passed on to SYS_FS_Initialize
initialization function. Please refer to the example code provided for SYS_FS_Initialize.
Members
Members Description
SYS_FS_FILE_SYSTEM_TYPE
nativeFileSystemType;
Native file system of type SYS_FS_FILE_SYSTEM_TYPE
const SYS_FS_FUNCTIONS *
nativeFileSystemFunctions;
Pointer to the structure of type SYS_FS_FUNCTIONS which has the list of
Remarks
None.
5.7.4.6.3.9 SYS_FS_RESULT Enumeration
C
typedef enum {
SYS_FS_RES_SUCCESS = 0,
SYS_FS_RES_FAILURE = -1
} SYS_FS_RESULT;
Description
File operation result enum
This enumeration lists the various results of a file operation. When a file operation function is called from the application, and if
the return type of the function is SYS_FS_RESULT, then, the enumration below specifies the value of function return.
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Members
Members Description
SYS_FS_RES_SUCCESS = 0 Operation successful
SYS_FS_RES_FAILURE = -1 operation failed
5.7.4.6.3.10 FAT_FS_MAX_LFN Macro
C
#define FAT_FS_MAX_LFN 255
Description
FAT File System LFN (long file name) max length
Set the value to 255
5.7.4.6.3.11 FAT_FS_MAX_SS Macro
C
#define FAT_FS_MAX_SS 512
Description
FAT File System Sector size
Maximum sector size to be handled. Always set the value of sector size to 512
5.7.4.6.3.12 FAT_FS_USE_LFN Macro
C
#define FAT_FS_USE_LFN 1
Description
FAT File System LFN (long file name) selection
The FAT_FS_USE_LFN option switches the LFN support. Set the value to 1
5.7.4.6.3.13 SYS_FS_HANDLE_INVALID Macro
C
#define SYS_FS_HANDLE_INVALID ((SYS_FS_HANDLE)(-1))
Description
SYS FS File Invalid Handle
While the application code opens a file, if the file open is unsuccessful, an invalid file handle is returned. This definition defines
the type of invalid file handle.
Remarks
None.
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5.7.4.7 Files
Files
Name Description
sys_fs.h This file contains function and type declarations required to interact with the
Harmony File System System Framework.
Description
5.7.4.7.1 sys_fs.h
File System System-Library Interface Declarations and types.
This file contains function and type declarations required to interact with the Harmony File System System Framework.
Enumerations
Name Description
SYS_FS_ERROR Lists the various error cases
SYS_FS_FILE_OPEN_ATTRIBUTES Lists the various attributes (modes) in which a file can be opened
SYS_FS_FILE_SEEK_CONTROL Lists the various modes of file seek
SYS_FS_FILE_SYSTEM_TYPE Enumerated data type identifying native file systems supported.
SYS_FS_RESULT Lists the various results of a file operation
Functions
Name Description
SYS_FS_FileClose Close a file.
SYS_FS_FileEOF check handle status
SYS_FS_FileError check the type of error
SYS_FS_FileNameGet Reads the file name.
SYS_FS_FileOpen Open a file
SYS_FS_FileRead Read specified bytes from a file
SYS_FS_FileSeek Move the file pointer.
SYS_FS_FileSize Returns the size of the file
SYS_FS_FileStat Get file status
SYS_FS_FileTell Obtains the file pointer position
SYS_FS_FileWrite Write on the file
SYS_FS_Initialize Initializes the File system Abstration Layer (sys_fs layer).
SYS_FS_Mount Mount filesystems
SYS_FS_Tasks Tasks for the sys_fs layer
SYS_FS_Unmount unmount filesystems
Macros
Name Description
FAT_FS_MAX_LFN Lists the maximum length of file name during LFN selection
FAT_FS_MAX_SS Lists the definitions for FAT file system sector size.
FAT_FS_USE_LFN Lists the definitions for FAT file system LFN selection
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SYS_FS_HANDLE_INVALID This definitions defines the SYS FS file invalid handle.
Structures
Name Description
SYS_FS_FSTAT The structure to obtain the status of a file.
SYS_FS_FUNCTIONS SYS FS Function signature structure for native file systems
SYS_FS_REGISTRATION_TABLE The sys_fs layer has to be initialized by passing this structure with suitably
initialized members.
Types
Name Description
SYS_FS_HANDLE This type defines the file handle.
File Name
sys_fs.h
Company
Microchip Technology Incorported
5.7.5 Interrupt System Service Library
5.7.5.1 Introduction
Interrupt System Service
for
Microchip Microcontrollers
This library implements the Interrupt System Service. It is part of the system services that provides support for processing
interrupts. The Interrupt System provides support for initializing the processor's interrupt controller, registering Interrupt Service
Routines (ISRs) and managing interrupts. These features enable making efficient and dynamic applications, drivers, and
middleware that respond to external events as they occur in real time.
5.7.5.2 Release Notes
MPLAB Harmony Version: v0.70b Interrupt System Service Library Version : 1.0 Release Date: 18Nov2013
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New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.7.5.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.7.5.4 Using the Library
This topic describes the basic architecture of the Interrupt System Service Library and provides information and examples on
how to use it.
Interface Header File: sys_int.h
The interface to the Interrupt System Service library is defined in the "sys_int.h" header file, which is included by the "sys.h"
system service header file. Any C language source (.c) file that uses the Interrupt System Service library should include "sys.h".
Library File:
The Interrupt System Service library (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the library interacts with the framework.
5.7.5.4.1 Abstraction Model
This library provides an abstraction of the interrupt subsystem that is used by device drivers, middleware libraries and
applications to receive and control interrupts in real time.
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Interrupt System Service
The interrupt system services provide support for initializing the processor's interrupt controller, managing Interrupt Service
Routines (ISRs) and managing interrupts.
Initialization
Each software module (device driver, library, or application) that needs to receive an interrupt must enable that interrupt itself.
This is normally done in the module's initialization routine which is called by the "SYS_Initialize" service.
A module that intends to use an interrupt must first register the "Tasks" function that is to be called when the desired source
causes an interrupt. Then, it must enable that source, once it is ready to start receiving interrupts.
If the interrupt system service is configured for static usage, then the routine that dynamically registers the "Tasks" function will
be nulled out by a macro (generating no run-time code) and, instead, the "Tasks" routine must be called statically from the
function that implements the raw ISR vector. How this is done is different for each processor family, as explained below.
Interrupt Service Routine (ISR)
Each software module (device driver, library, or application) that needs to receive an interrupt must implement a "Tasks" routine
to handle that interrupt. In order for the module to operate in an interrupt-driven mode, the "Tasks" routine must be called from
within the appropriate "raw" Interrupt Service Routine (ISR).
How the raw ISR is implemented is highly dependent upon the specific processor being used. Libraries are available that
implement raw ISRs for each processor family in a way that allows dynamic registration and de-registration of "Tasks" routines.
These libraries maintain tables that associate the "Tasks" routine registered by the SYS INIT service with each interrupt source
in the system.
Alternately, in a statically-linked system implementation, the ISR may be implemented by the system designer or integrator (in
the configuration-specific "sys_int.c" file). Such "static" ISR implementations must identify the source of the interrupt then directly
call the appropriate module's "Tasks" routine. This requires knowledge of the modules that have been included in the system and
cannot be implemented in advance as a library.
Note: It is also possible, in a highly optimized system (or to support highly resource-restricted parts), to implement the logic of the
module's "Tasks" routine directly in the raw ISR. However, this method is not recommended unless absolutely necessary to meet
system timing requirements.
Board Support Packages (BSPs)
If the processor is affixed directly to the board, the BSP may also implement any required "raw" ISRs, eliminating the need for
the system designer or integrator to implement the ISR(s) himself. Refer to the documentation for the BSP in use for details on
what initialization and ISR support it provides. This support is not implemented by the Interrupt System Services library.
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5.7.5.4.2 Library Overview
The diagram below describes the major components of the usage model.
Library Usage Model
Each of the blocks in the diagram above correspond to the library interface section.
Library Interface Section Description
Interrupt System Setup Functions Provides processor specific initialization of the interrupt system.
Global Interrupt Management Functions Provide interface routines to enable/disable all interrupts on the
system.
5.7.5.4.3 How the Library Works
The Interrupt System Service Library can be used by a device driver, middleware layer, or application to provide access to, and
control over, interrupts to the processor.
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the modes
supported for your device.
5.7.5.4.3.1 Interrupt System Setup
The Interrupt System Service library must be initialized by calling the SYS_INT_Initialize routine. If the MPLAB Harmony
dynamic initialization service is used, the "SYS_INT_Initialize" routine will be called automatically when the "SYS_Initialize"
function is called. In a statically initialized system, the system designer or integrator must implement the "SYS_Initialize" function
and that function must call "SYS_INT_Initialize" before initializing any modules that might require use if the interrupt system
service. Once the library has been initialized, call the function SYS_INT_Enable to enable interrupts to the processor. However,
before enabling the generation of interrupts to the processor, each individual module (driver, library, or application) must have a
"Tasks" routine to in place (either registered with SYS_INT_DynamicRegister or statically linked to the raw ISR) to handle the
interrupt before it enables it's own interrupt.
Example: Initializing the System Interrupt Library
SYS_INT_Initialize();
// Initialize all interrupt-aware software modules
SYS_INT_Enable();
5.7.5.4.3.2 Critical Sections
Critical Sections
Critical sections of code are small sections of code that must execute atomically, with no possibility of being interrupted. To
support this, the following technique can be used.
Global Interrupt Management provides routines to create a global critical section of code.
Global Critical Section
If no interrupts of any kind can be allowed within a critical section of code, the following routines can be used to ensure this.
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• SYS_INT_Disable: To start a critical section, all interrupts are disabled with the call of this function
• SYS_INT_Enable : To end a critical section, interrupts are enabled from the interrupt controller to the core.
• SYS_INT_IsEnabled: Status to indicate if interrupts are currently enabled or not.
Example: Global Critical Section
bool flag;
flag = SYS_INT_Disable();
// Do something critical
if (flag)
{
SYS_INT_Enable();
}
Source Interrupt Management provides interface routines to create local critical sections
Local Critical Sections
Normally, it is not necessary to globally disable all possible interrupts. For example, in a driver for a specific device, it is not
normally important if an unrelated interrupt occurs in the middle of a critical section of code. However, if the interrupt for the
source that the driver manages must not occur within a critical section of code, it can be protected using the following technique.
Example: Local Critical Section
bool flag;
// interrupt source enable status before disable is called
flag = SYS_INT_SourceDisable(MY_DRIVER_INTERRUPT_SOURCE);
// Do something critical
if (flag)
{
SYS_INT_SourceEnable(MY_DRIVER_INTERRUPT_SOURCE);
}
Note: These methods of protecting critical sections is usually implemented as part of an Operating System Abstraction Layer
(OSAL), so it is not normally necessary to use these examples explicitly. Normally, the OSAL will provide single functions or
macros that implement this functionality. So, if available, an OSAL method is preferred over implementing the critical section
code as shown in the above examples.
5.7.5.4.3.3 Source Interrupt Management
The driver, middleware, or application's interrupt-handling "Tasks" routine must do two things at a minimum, in the following
order.
1. Remove the cause of the interrupt
2. Clear the interrupt source by calling the function SYS_INT_SourceStatusClear
Exactly what actions are necessary to remove the cause of an interrupt is completely dependent on the source of the interrupt.
This is normally the main purpose of the driver itself and is beyond the scope of this section. Refer to the documentation for the
peripheral being managed.
WARNING! The cause of the interrupt must be removed before clearing the interrupt source or the interrupt may re-occur
immediately after the source is cleared potentially causing an infinite loop. An infinite loop may also occur if the source is not
cleared before the interrupt-handler returns.
Example: Handling Interrupts
void DRV_MYDEV_Tasks( SYS_MODULE_OBJ object )
{
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// Remove the cause of the interrupt
//...
// Clear Interrupt source
SYS_INT_SourceStatusClear(myIntSourceID);
}
Note: The value of "myIntSourceID" is usually either a static or dynamic configuration option. Refer to the documentation for the
specific device driver to identify how to define the interrupt source ID.
Testing Interrupt
Some times it is necessary to cause an interrupt in software, possibly for testing purposes. To support this, the function
SYS_INT_SourceStatusSet is provided.
Example: Causing an Interrupt in Software
SYS_INT_SourceStatusSet(MY_DRIVER_INTERRUPT_SOURCE);
Note: This feature is not available for all interrupt sources on all Microchip microcontrollers. Refer to the data sheet for the
microcontroller being used to determine if it is possible for software to set a specific interrupt source.
5.7.5.5 Configuring the Library
Three things must be correctly configured in order to use the System Interrupt library.
1. Select the Appropriate Processor
2. Initialize the Interrupt System Service
3. Configure the Raw ISR Support
Select the Appropriate Processor
The following data types are dependent on the processor selection and are actually defined in the interrupt peripheral library for
the specific microcontroller being used.
• INT_SOURCE
• INT_PRIORITY
• INT_SUBPRIORITY
These are configured by selecting the appropriate processor in MPLAB, which adds the "mprocessor" option to the compiler
command line to identify the correct processor and processor-specific implementation of the peripheral library to use. Since the
System Interrupt library is part of the Microchip Firmware Framework, it will get built with the correct definition of these data types.
Initialize the Interrupt System Service
There are two ways to initialize the interrupt system service, depending on whether you're using a static configuration or a
dynamic configuration.
For a dynamic configuration the constant SYS_INT_DYNAMIC needs to be defined. This makes SYS_INT_DynamicRegister and
SYS_INT_DynamicDeregister available. The required driver tasks routines need to be registered using
SYS_INT_DynamicRegister function.
For a static configuration, the system designer or integrator must implement the SYS_INT_Initialize routine. This routine's
purpose is to perform any actions necessary to initialize the interrupt subsystem and interrupt controller on the specific processor
and system, usually interacting directly with the Interrupt controller modules Peripheral Library (PLIB) to accomplish these tasks.
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Configure the Raw ISR Support
In some systems, there may only be a single actual ("raw") ISR to handle all interrupts. In this sort of system, most of the System
Interrupt library may be implemented in software, with only the highest level interrupt being supported by hardware. In other
systems, all interrupts may be supported by separate ISRs and vector selection and prioritization will be supported by hardware.
ISRs may be dynamically linked to specific interrupt sources or they may be statically linked at build time. If a dynamic interrupt
library is used(by defining the constant SYS_INT_DYNAMIC) , the calls to SYS_INT_DynamicRegister will register a pointer to
the given "Tasks" routine for each registered interrupt source in an internal table. The dynamic library will then determine the
source of the interrupt and call the given "Tasks" routine.
If a static configuration is desired, the "raw" ISR support must be implemented so that it directly calls (using static, build-time
linkage) the appropriate module's "Tasks" routine. This requires the system implementer or integrator to implement the raw ISR,
but it reduces the amount of overhead necessary to handle interrupts, reducing both interrupt latency and code size.
5.7.5.5.1 Static Configuration
When statically configuring raw ISR support, the system implementer or integrator must directly implement the raw ISRs in an
appropriate manner for the selected processor. The Raw ISR, must then call the appropriate "Tasks" routine to properly handle
and clear the interrupt source.
Description
A static configuration of the raw ISR support for MPLAB Harmony requires processor-family-specific knowledge. Or, more
accurately, it requires compiler-specific knowledge. The examples below will show a sampling of how to implement a raw ISR for
different part families. Refer to the compiler manual for the selected processor family for details of how to implement an interrupt
service routine.
Raw ISR Responsibilities:
1. Identify the Interrupt Source
2. Call the Appropriate Module's "Tasks" Routine
The first thing a raw ISR must do is identify the source of the interrupt. For some processor families, each interrupt source has its
own interrupt "vector". This means that the only time a specific ISR is called is when a specific source has caused an interrupt.
Thus, the raw ISR can assume that every time it is called it's source has caused an interrupt. Other processor families combine
two or more interrupt sources into a single interrupt "vector". In such a case, the raw ISR must verify which source caused the
interrupt and it must verify if that source is enabled. In either case, once the raw ISR has identified the interrupt source, it must
call the appropriate module's "Tasks" routine to service and clear the interrupt.
Example: PIC32 Timer-1 Raw ISR
void __ISR ( _TIMER_1_VECTOR ) _InterruptHandler_TMR_1_stub( void )
{
/* Call the timer driver's "Tasks" routine */
DRV_TMR_Tasks ( gTMRObject );
}
Example: PIC24 Timer-1 Raw ISR
void __attribute__ ( ( interrupt, no_auto_psv ) ) _ISR _T1Interrupt( void )
{
/* Call the timer driver's "Tasks" routine */
DRV_TMR_Tasks ( gTMRObject );
}
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Example: PIC18 Timer-1 Raw ISR
#pragma interrupt_level 0
void interrupt low_priority InterruptHandler_low_priority_stub ( void )
{
if ( SYS_INT_SourceIsEnabled( gTMRObject ) && PLIB_INT_SourceFlagGet( gTMRObject ) )
{
/* Call the timer driver's "Tasks" routine */
DRV_TMR_Tasks ( gTMRObject );
}
// Check other sources...
}
In all of the above examples, "gTMRObject" holds the return value from the "DRV_TMR_Initialize" routine.
The SYS_INT_DynamicRegister and SYS_INT_DynamicDeregister routines are macro switched to compile away to nothing if a
static configuration is chosen
5.7.5.5.2 Dynamic Configuration
When dynamically configuring raw ISR support, the system implementer or integrator must register each interrupt-driven driver
or module's "Tasks" routine with the dynamic system interrupt service for the appropriate interrupt source. The dynamic SYS INT
service will then ensure that the appropriate "Tasks" routine is called when an interrupt occurs.
Description
When using the dynamic system interrupt (SYS INT) service, it is not necessary to implement "raw ISRs" for interrupt-driven
modules. The processor-family-specific, dynamic SYS INT implementation provided with MPLAB Harmony implements the "raw
ISR(s)" so the system developer or integrator doesn't have to. Instead, the system developer must register the module's "Tasks"
routine(s) using the "SYS_ModuleRegister" routine after registering the module in the module registration routine (described in
the SYS INIT documentation). The example below shows how a module must register its ISR "Tasks" routine.
Example: Dynamic Registration of an Interrupt-Driven Module
// Register the TMR driver's "Tasks" routine with the SYS INT service
SYS_INT_DynamicRegister(object, DRV_TMR_Tasks, PLIB_INT_SOURCE_TIMER_1);
The module init routine must register the module's "Tasks" routine(s) with the SYS INT service instead of the SYS TASKS
service. to do this, it calls the "SYS_INT_DynamicRegister" routine, passing in the object(the same object handle returned by the
module's initialization routine), along with a pointer to the module's "Tasks" routine and the interrupt source with which it will be
associated.
5.7.5.6 Library Interface
Data Types and Constants
Name Description
SYS_INT_TASKS_POINTER Pointer to an interrupt-handlng "Tasks" routine.
Global Interrupt Management Functions
Name Description
SYS_INT_Disable Disables interrupts to the processor.
SYS_INT_Enable Enables global interrupts to the processor.
SYS_INT_IsEnabled Identifies if interrupts are currently enbled or disabled at the top level.
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Interrupt Source Management Functions
Name Description
SYS_INT_SourceDisable Disables the specified source from generating interrupts to the processor.
SYS_INT_SourceEnable Enables the specified source to generate interrupts to the processor.
SYS_INT_SourceIsEnabled Identifies if the specified source is enabled or disabled.
SYS_INT_SourceStatusClear Clears the interrupt request for the specified interrupt source.
SYS_INT_SourceStatusGet Determines the status of the specified interrupt source.
SYS_INT_SourceStatusSet Sets the specified interrupt source.
SYS_INT_VectorPrioritySet Sets the given interrupt vector to the specified priority.
SYS_INT_VectorSubprioritySet Sets the specified interrupt vector to the given sub priority.
Interrupt System Setup Functions
Name Description
SYS_INT_Initialize Configures and initializes the interrupt subsystem.
SYS_INT_DynamicDeregister Deregisters the current ISR from the given interrupt source.
SYS_INT_DynamicRegister Registers an Interrupt "Tsks" Routine for the specified interrupt source or trap).
Description
5.7.5.6.1 Interrupt System Setup Functions
5.7.5.6.1.1 SYS_INT_Initialize Function
C
void SYS_INT_Initialize();
Description
This function configures and initializes the interrupt subsystem appropriately for the current system design.
Preconditions
None.
Returns
None.
Remarks
None.
The System Interrupt library must be initialized by calling the SYS_INT_Initialize routine. This is normally done in the
"SYS_Initialize" routine before any interrupt support is used. If the dynamic interrupt system service is not used, the
"SYS_Initialize" routine must be implemented by the system designer or integrator as required by the system design and is not
implemented by the System Interrupt library. The global interrupts are enabled as a part the call to "SYS_INT_Initialize".
However, before enabling the generation of interrupts to the processor, each individual module (driver, library, or application)
must have a "Tasks" routine to in place ( statically linked to the raw ISR) to handle the interrupt before it enables it's own
interrupt.
Example: Initializing the System Interrupt Library
SYS_INT_Initialize();
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Example
// Initialize the interrupt system. This needs to done in the initialization
// code.
SYS_INT_Initialize();
5.7.5.6.1.2 SYS_INT_DynamicDeregister Function
C
void SYS_INT_DynamicDeregister(
INT_SOURCE source
);
Description
This function deregisters the current Interrupt Service Routine (ISR), if any, from the specified interrupt source.
Preconditions
SYS_INT_Initialize must have been called.
Parameters
Parameters Description
source Identifier for the desired interrupt source
Returns
None.
Remarks
It is safe to call this routine, even of no ISR has been registered for the given interrupt source.
Calling this routine is optional. If the system is designed such that the given ISR is expected to always be available once the
system has been initialiazed, this routine does not need to be called.
Example
SYS_INT_DynamicDeregister(SYS_INT_TIMER_1);
5.7.5.6.1.3 SYS_INT_DynamicRegister Function
C
void SYS_INT_DynamicRegister(
INT_SOURCE source,
SYS_INT_TASKS_POINTER tasks,
SYS_MODULE_OBJ object
);
Description
This function registers an Interrupt "Tasks" Routine for the specified interrupt source or trap).
Preconditions
SYS_INT_Initialize must have been called.
Parameters
Parameters Description
source Identifier for the desired interrupt source
tasks Pointer to the tasks routine
object Handle to the module instance
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Returns
None.
Remarks
This routine only generates executable code when a driver is configured to register dynamically its "Tasks" routine with the
system interrupt service. However, it should be called even if the ISR-to-source association is defined statically at compile time
to maintain source code compatibility. A device driver normally registers its own ISR from it's initialization routine.
In the example code, the macros MY_DRIVER_INTERRUPT_SOURCE would be defined in the appropriate configuration
header, which would be included by the driver source file where the "DRV_MYDEV_Tasks" routine and the MyParam data would
be defined.
It is safe to call this routine without first calling SYS_INT_DynamicDeregister, even if a previous ISR has been registered. The
effect will be that the new ISR supplants the old one.
The System Interrupt library must be initialized by calling the SYS_INT_Initialize routine. This is normally done in the
"SYS_Initialize" routine before any interrupt support is used.
If the dynamic interrupt system service is not used, the "SYS_Initialize" routine must be implemented by the system designer or
integrator as required by the system design and is not implemented by the System Interrupt library.
Once the library has been initialized, call the function SYS_INT_Enable to enable interrupts to the processor. However, before
enabling the generation of interrupts to the processor, each individual module (driver, library, or application) must have a "Tasks"
routine to in place (either registered with SYS_INT_DynamicRegister or statically linked to the raw ISR) to handle the interrupt
before it enables it's own interrupt.
Example: Initializing the System Interrupt Library
// Initialize the interrupt system.
SYS_INT_Initialize();
// Initialize all interrupt-aware software modules
SYS_INT_Enable();
Example
SYS_INT_Initialize();
SYS_INT_DynamicRegister(MY_DRIVER_INTERRUPT_SOURCE, DRV_MYDEV_Tasks, MyObject);
5.7.5.6.2 Global Interrupt Management Functions
5.7.5.6.2.1 SYS_INT_Disable Function
C
bool SYS_INT_Disable();
Description
This function disables interrupts to the processor at the top level. This function can be called to prevent any source from being
able to generate an interrupt. It returns the global interrupt status before disabling the interrupts.
Preconditions
SYS_INT_Initialize must have been called.
Returns
true - Global Interrupts are enabled (before the call to disable) false - Global Interrupts are disabled (before the call to disable)
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Remarks
None.
Example
// Interrupt enable status
bool flag;
// Disable the global interrupts
flag = SYS_INT_Disable();
// Do something critical
// Check if interrupts were disabled/enabled
if (flag)
{
// enable the global interrupts if they were enabled before the
// call to SYS_INT_Disable()
SYS_INT_Enable();
}
5.7.5.6.2.2 SYS_INT_Enable Function
C
void SYS_INT_Enable();
Description
This function enables interrupts to the processor at the top level, allowing any currently enabled source to generate an interrupt.
This function must be called before any source will be able to generate an interrupt.
Preconditions
None.
Returns
None.
Remarks
SYS_INT_Enable is called from the SYS_INT_Initialize() function.
Example
// Check if global interrupts are enabled
if(!SYS_INT_IsEnabled())
{
// Enable the global interrupts.
SYS_INT_Enable();
}
5.7.5.6.2.3 SYS_INT_IsEnabled Function
C
bool SYS_INT_IsEnabled();
Description
This function identifies if interrupts are enbled or disabled at the top level.
Preconditions
SYS_INT_Initialize must have been called.
Returns
• true - If the interrupts are currently enabled
• false - If the interrupts are ccurrentlyl disabled
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Remarks
None.
Example
// Check if global interrupts are enabled
if ( SYS_INT_IsEnabled() )
{
// Interrupt enable status
bool flag;
// Disable the global interrupts.
flag = SYS_INT_Disable();
}
5.7.5.6.3 Interrupt Source Management Functions
5.7.5.6.3.1 SYS_INT_SourceDisable Function
C
bool SYS_INT_SourceDisable(
INT_SOURCE source
);
Description
This routine disables the given source from generating interrupts the processor when events occur.It returns the interrupt source
enable/disable status before disabling the interrupt source.
Preconditions
SYS_INT_Initialize must have been called.
Parameters
Parameters Description
source Identifier for the desired interrupt source.
Returns
• true - The Interrupt source is enabled (before the call to SYS_INT_SourceDisable)
• false - The Interrupt source is disabled (before the call to SYS_INT_SourceDisable)
Remarks
None.
Example
// interrupt source enable/disable status.
bool flag
// Initialize the interrupt system.This needs to done in the initialization
// code.
SYS_INT_Initialize();
// Disable the interrupt source
flag = SYS_INT_SourceDisable(INT_SOURCE_PARALLEL_PORT);
// before enabling the source check the enable/disable status
if(flag)
{
SYS_INT_SourceEnable(INT_SOURCE_PARALLEL_PORT);
}
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5.7.5.6.3.2 SYS_INT_SourceEnable Function
C
void SYS_INT_SourceEnable(
INT_SOURCE source
);
Description
This routine enables the specified source to generate interrupts to the processor when events occur.
Preconditions
SYS_INT_Initialize must have been called and an ISR must have been registered for the source.
Parameters
Parameters Description
source Identifier for the desired interrupt source
Returns
None.
Remarks
An Interrupt Service Routine (ISR) for the given interrupt source must be ready to receive the call before the source is enabled.
Example
// Initialize the interrupt system. This needs to done in the initialization
// code.
SYS_INT_Initialize();
// Enable the interrupt source
SYS_INT_SourceEnable(INT_SOURCE_PARALLEL_PORT);
5.7.5.6.3.3 SYS_INT_SourceIsEnabled Function
C
bool SYS_INT_SourceIsEnabled(
INT_SOURCE source
);
Description
This function identifies if the specified source is currently enabled or is currently disabled.
Preconditions
SYS_INT_Initialize must have been called.
Parameters
Parameters Description
source Identifier for the desired interrupt source.
Returns
• true - If the given source is currently enabled.
• false - If the given source is currently disabled.
Remarks
None.
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Example
// Initialize the interrupt system. This needs to done in the initialization
// code.
SYS_INT_Initialize();
// Check if the required interrupt source is enabled
if ( SYS_INT_SourceIsEnabled(INT_SOURCE_PARALLEL_PORT))
{
// App code
}
5.7.5.6.3.4 SYS_INT_SourceStatusClear Function
C
void SYS_INT_SourceStatusClear(
INT_SOURCE source
);
Description
This function clears the interrupt request for the specified interrupt source.
Preconditions
SYS_INT_Initialize must have been called.
Parameters
Parameters Description
source Identifier for the desired interrupt source
Returns
None.
Remarks
None.
Example
// Initialize the interrupt system. This needs to done in the initialization
// code.
SYS_INT_Initialize();
// Check if the interrupt source flag is set
if ( SYS_INT_SourceStatusGet(INT_SOURCE_PARALLEL_PORT) )
{
// Clear the interrupt flag
SYS_INT_SourceStatusClear(INT_SOURCE_PARALLEL_PORT);
}
5.7.5.6.3.5 SYS_INT_SourceStatusGet Function
C
bool SYS_INT_SourceStatusGet(
INT_SOURCE source
);
Description
This function determines the current status of the interrupt source.
Preconditions
SYS_INT_Initialize must have been called.
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Parameters
Parameters Description
source Identifier for the desired interrupt source
Returns
• true - If the given interrupt source is currently set
• false - If the given interrupt source is not currently set
Remarks
Works even if the interrupt source or interrupts in general have not been enabled, so it can be used for polling implementations.
Example
// Initialize the interrupt system.This needs to done in the initialization
// code.
SYS_INT_Initialize();
// Check if the required interrupt source is set
if ( SYS_INT_SourceStatusGet(INT_SOURCE_PARALLEL_PORT) )
{
// Handle interrupt
}
5.7.5.6.3.6 SYS_INT_SourceStatusSet Function
C
void SYS_INT_SourceStatusSet(
INT_SOURCE source
);
Description
This function sets the specified interrupt source, causing the processor to be interrupted if interrupts are enabled, the source has
been enabled, and the priority is higher than the current priority.
Preconditions
SYS_INT_Initialize must have been called and an ISR must have been registered for the source (if interrupts and the source are
enabled).
Parameters
Parameters Description
source Identifier for the desired interrupt source
Returns
None.
Remarks
Not supported for all interrupt sources. Check the specific data sheet for software clear only interrupt sources.
The driver, middleware, or application's interrupt-handling "Tasks" routine must do two things at a minimum, in the following
order.
1. Remove the cause of the interrupt
2. Clear the interrupt source by calling the function SYS_INT_SourceStatusClear
Exactly what actions are necessary to remove the cause of an interrupt is completely dependent on the source of the interrupt.
This is normally the main purpose of the driver itself and is beyond the scope of this section. Refer to the documentation for the
peripheral being managed.
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WARNING! The cause of the interrupt must be removed before clearing the interrupt source or the interrupt may re-occur
immediately after the source is cleared potentially causing an infinite loop. An infinite loop may also occur if the source is not
cleared before the interrupt-handler returns.
Example: Handling Interrupts
void DRV_MYDEV_Tasks( SYS_MODULE_OBJ object )
{
// Remove the cause of the interrupt
//...
// Clear Interrupt source
SYS_INT_SourceStatusClear(myIntSourceID);
}
Note: the value of "myIntSourceID" is usually either a static or dynamic configuration option. Refer to the documentation for the
specific device driver to identify how to define the interrupt source ID.
Testing Interrupt
Some times it is necessary to cause an interrupt in software, possibly for testing purposes. To support this, the function
SYS_INT_SourceStatusSet is provided.
Example: Causing an Interrupt in Software
SYS_INT_SourceStatusSet(MY_DRIVER_INTERRUPT_SOURCE);
Note: This feature is not available for all interrupt sources on all Microchip microcontrollers. Refer to the data sheet for the
microcontroller being used to determine if it is possible for software to set a specific interrupt source.
Example
// Initialize the interrupt system. This needs to done in the initialization
// code.
SYS_INT_Initialize();
// Check if interrupt source flag is set
if ( !SYS_INT_SourceStatusGet(INT_SOURCE_PARALLEL_PORT) )
{
// Set the interrupt source flag
SYS_INT_SourceStatusSet(INT_SOURCE_PARALLEL_PORT);
}
5.7.5.6.3.7 SYS_INT_VectorPrioritySet Function
C
void SYS_INT_VectorPrioritySet(
INT_VECTOR vector,
INT_PRIORITY_LEVEL priority
);
Description
This routine sets the given interrupt vector to the specified priority.
Preconditions
SYS_INT_Initialize must have been called.
Parameters
Parameters Description
vector Identifier for the desired interrupt vector
priority Priority (if supported)
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Returns
None.
Remarks
This feature is not supported on all devices. Refer to the specific device data sheet or family reference manual to determine
whether this feature is supported.
In the example code, the macros MY_DRIVER_INTERRUPT_VECTOR, MY_DRIVER_ISR_PRIORITY would be defined
appropriately during configuration.
Example
#define MY_DRIVER_INTERRUPT_VECTOR INT_VECTOR_T1
#define MY_DRIVER_ISR_PRIORITY INT_PRIORITY_LEVEL2
// Initialize the interrupt system.This needs to done in the initialization
// code.
SYS_INT_Initialize();
// Assign priority to the interrupt vector
SYS_INT_VectorPrioritySet(MY_DRIVER_INTERRUPT_VECTOR, MY_DRIVER_ISR_PRIORITY);
5.7.5.6.3.8 SYS_INT_VectorSubprioritySet Function
C
void SYS_INT_VectorSubprioritySet(
INT_VECTOR vector,
INT_SUBPRIORITY_LEVEL subpriority
);
Description
This function sets the specified interrupt vector to the specified sub-priority.
Preconditions
SYS_INT_Initialize must have been called.
Parameters
Parameters Description
vector Identifier for the desired interrupt vector
subpriority Subproirity (if supported)
Returns
None.
Remarks
This feature is not supported on all devices. Refer to the specific device data sheet or family reference manual to determine
whether this feature is supported.
In the example code, the macros MY_DRIVER_INTERRUPT_VECTOR, MY_DRIVER_ISR_SUB_PRIORITY would be defined
appropriately during configuration.
Example
#define MY_DRIVER_INTERRUPT_VECTOR INT_VECTOR_T1
#define MY_DRIVER_ISR_PRIORITY INT_PRIORITY_LEVEL2
#define MY_DRIVER_ISR_SUB_PRIORITY INT_SUBPRIORITY_LEVEL1
// Initialize the interrupt system.This needs to done in the initialization
// code.
SYS_INT_Initialize();
// Assign priority to the interrupt vector
SYS_INT_VectorPrioritySet(MY_DRIVER_INTERRUPT_VECTOR, MY_DRIVER_ISR_PRIORITY);
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// Assign sub-priority to the interrupt vector
SYS_INT_VectorSubprioritySet(MY_DRIVER_INTERRUPT_VECTOR, MY_DRIVER_ISR_SUB_PRIORITY);
5.7.5.6.4 Data Types and Constants
5.7.5.6.4.1 SYS_INT_TASKS_POINTER Type
C
typedef void (* SYS_INT_TASKS_POINTER)(SYS_MODULE_OBJ object);
Description
Interrupt Tasks Routine Pointer
This data type defines a pointer to an interrupt-handling "Tasks" routine. The form of a tasks routine is as follows:
void My_Tasks ( SYS_MODULE_OBJ object );
Where "MyTasks" is the name of the tasks routine and object is a Handle to the module instance.
Remarks
"Tasks" is normally defined by a device driver, middleware, or system layer.
The term Interrupt Service Routine (ISR) is used for the "raw" ISR code that is either located directly at the interrupt vector
address or whose address is loaded from the interrupt vector. The term "Tasks" routine is used to identify the driver-specific
routine that is called by the actual ISR to perform the tasks necessary to handle and clear the interrupt.
5.7.5.7 Files
Files
Name Description
sys_int.h Interrupt System Service.
Description
5.7.5.7.1 sys_int.h
Interrupt System Service Library Interface Definition
This file contains the interface definition for the Interrupt System Service. It provides a way to interact with the interrupt
subsystem to manage the occurance of interrupts for sources supported by the system.
Functions
Name Description
SYS_INT_Disable Disables interrupts to the processor.
SYS_INT_DynamicDeregister Deregisters the current ISR from the given interrupt source.
SYS_INT_DynamicRegister Registers an Interrupt "Tsks" Routine for the specified interrupt source or trap).
SYS_INT_Enable Enables global interrupts to the processor.
SYS_INT_Initialize Configures and initializes the interrupt subsystem.
SYS_INT_IsEnabled Identifies if interrupts are currently enbled or disabled at the top level.
SYS_INT_SourceDisable Disables the specified source from generating interrupts to the processor.
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SYS_INT_SourceEnable Enables the specified source to generate interrupts to the processor.
SYS_INT_SourceIsEnabled Identifies if the specified source is enabled or disabled.
SYS_INT_SourceStatusClear Clears the interrupt request for the specified interrupt source.
SYS_INT_SourceStatusGet Determines the status of the specified interrupt source.
SYS_INT_SourceStatusSet Sets the specified interrupt source.
SYS_INT_VectorPrioritySet Sets the given interrupt vector to the specified priority.
SYS_INT_VectorSubprioritySet Sets the specified interrupt vector to the given sub priority.
Types
Name Description
SYS_INT_TASKS_POINTER Pointer to an interrupt-handlng "Tasks" routine.
File Name
sys_int.h
Company
Microchip Technology Inc.
5.7.6 Messaging System Service Library
5.7.6.1 Introduction
Messaging System Service Library
for
Microchip Microcontrollers
This library provides intra-process and inter-process communication by the sending and receiving of simple messages. The
format of these messages is under developer control, providing flexibility to tune message format for each application. The
number and size of message queues is under developer control, with a message priority scheme implemented by multiple
queues. Each priority queue has an configurable size. The number of message types and the number of receiving mailboxes is
also configurable.
Description
This library provides intra-process and inter-process communication by the sending and receiving of simple messages. The
format of these messages is under developer control, providing flexibility to tune message format for each application. The
number and size of message queues is under developer control, with a message priority scheme implemented by multiple
queues. Each priority queue has an configurable size. The number of message types and the number of receiving mailboxes is
also configurable.
Consider an application that combines graphics on a display screen, with a touch overlay on top of the screen, and several
buttons. System messages can be used by touch software to alert the graphics part of the application to update the screen as
well as alert other parts of the application to perhaps change the audio volume whenever a slider value has changed. This is
easily supported by the Messaging System Services Library.
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5.7.6.2 Release Notes
MPLAB Harmony Version: v0.70b Messaging System Service Library Version : 0.01a Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.7.6.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.7.6.4 Using the Library
Interface Header File: sys_msg.h
The interface to the Messaging System Service library is defined in the "sys_msg.h" header file".
This library uses calloc to allocate memory for:
• Message queues for each priority as part of SYS_MSG_Initialize
• Mailbox definition objects
• Message type objects
If calls to calloc fails to allocate the needed memory then object handles are returned with a value of
SYS_OBJ_HANDLE_INVALID.
Here is a simple example that can be run on any PIC32 starter kit:
#include
#include
#include "system/common/sys_module.h"
#include "system/msg/sys_msg.h"
#include "system/msg/src/sys_msg_local.h"
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// Strawman callback functions for three mailboxes
void myCallBack0( SYS_MSG_OBJECT *pMessage )
{
DBPRINTF("CallBack0:: Message Type: %d, nSource: %d\r\n"
" param 0: %d, param1: %d, param2: %d \r\n",
pMessage->nMessageTypeID,
pMessage->nSource, pMessage->param0,
pMessage->param1, pMessage->param2
);
}
void myCallBack1( SYS_MSG_OBJECT *pMessage )
{
DBPRINTF("CallBack1:: Message Type: %d, nSource: %d\r\n"
" param 0: %d, param1: %d, param2: %d \r\n",
pMessage->nMessageTypeID,
pMessage->nSource, pMessage->param0,
pMessage->param1, pMessage->param2
);
}
void myCallBack2( SYS_MSG_OBJECT *pMessage )
{
DBPRINTF("CallBack2:: Message Type: %d, nSource: %d\r\n"
" param 0: %d, param1: %d, param2: %d \r\n",
pMessage->nMessageTypeID,
pMessage->nSource, pMessage->param0,
pMessage->param1, pMessage->param2
);
}
int main(void)
{
SYS_MSG_MESSAGING_OBJECT oSysMsg;
SYS_OBJ_HANDLE hSysMsg, hMsgType[5], hMailbox[3];
SYS_MSG_INSTANCE iSysMsg = SYS_MSG_0;
SYS_MSG_OBJECT myMessage[5];
{// SYS_MSG_Initialize
uint8_t nQSizes[] = SYS_MSG_BUFFER_SIZES;
// Initialize the messaging system. This needs to done in the initialization code.
hSysMsg = SYS_MSG_Initialize(iSysMsg,SYS_MSG_MAX_PRIORITY+1,nQSizes);
SYS_ASSERT( SYS_OBJ_HANDLE_INVALID != hSysMsg,"Bad hSysMsg!" );
}
// Create the message types to be used
// ID: :Priority
hMsgType[0] = SYS_MSG_TypeCreate(iSysMsg,1<<0,0);
hMsgType[1] = SYS_MSG_TypeCreate(iSysMsg,1<<1,1);
hMsgType[2] = SYS_MSG_TypeCreate(iSysMsg,1<<2,2);
hMsgType[3] = SYS_MSG_TypeCreate(iSysMsg,1<<3,3);
hMsgType[4] = SYS_MSG_TypeCreate(iSysMsg,1<<4,4);
// Create the mailboxes to be used
hMailbox[0] = SYS_MSB_MailboxOpen( iSysMsg, &myCallBack0 );
hMailbox[1] = SYS_MSB_MailboxOpen( iSysMsg, &myCallBack1 );
hMailbox[2] = SYS_MSB_MailboxOpen( iSysMsg, &myCallBack2 );
// Identify which messages are of interest for each mailbox.
SYS_MSG_MailboxMsgAdd(hMailbox[0],hMsgType[0]);
SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<1));
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SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<2));
SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<3));
SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<4));
SYS_MSG_MailboxMsgAdd(hMailbox[1],hMsgType[0]);
SYS_MSG_MailboxMsgAdd(hMailbox[2],hMsgType[0]);
{//Send and receive messages
SYS_MSGQ_ELEMENT *pQElement;
SYS_MSG_OBJECT *pMessage;
SYS_MSG_RESULTS myResult;
SYS_MSG_QUEUE_STATUS qStatus[5];
uint16_t iPriority;
for (iPriority=0;iPriority<=SYS_MSG_MAX_PRIORITY;iPriority++)
{
myMessage[iPriority].nSource = SYS_MSG_MAX_PRIORITY-iPriority;
myMessage[iPriority].nMessageTypeID = 1<nMessageTypeID,
pMessage->nSource, pMessage->param0,
pMessage->param1, pMessage->param2
);
}
// Deliver messages for all mailboxes.
DBPRINTF("\r\nGot Messages: %d\r\n",SYS_MSG_GotMessages(iSysMsg));
for (iPriority=0;iPriority<=SYS_MSG_MAX_PRIORITY;iPriority++)
{
qStatus[iPriority] =
SYS_MSG_QueueStatus((SYS_OBJ_HANDLE)iSysMsg,iPriority);
}
DBPRINTF("Queue Status (4:-1:0): %d, %d, %d, %d, %d\r\n\r\n",
qStatus[4],qStatus[3],qStatus[2],qStatus[1],qStatus[0]);
while ( (pQElement = SYS_MSG_MessageReceive(iSysMsg)) != NULL )
{
SYS_MSG_MessageDeliver(iSysMsg,pQElement);
for (iPriority=0;iPriority<=SYS_MSG_MAX_PRIORITY;iPriority++)
{
qStatus[iPriority] =
SYS_MSG_QueueStatus((SYS_OBJ_HANDLE)iSysMsg,iPriority);
}
DBPRINTF("Queue Status (4:-1:0): %d, %d, %d, %d, %d\r\n\r\n",
qStatus[4],qStatus[3],qStatus[2],qStatus[1],qStatus[0]);
}
DBPRINTF("Got Messages: %d\r\n",SYS_MSG_GotMessages(iSysMsg));
}
return 0;
}
5.7.6.4.1 Abstraction Model
This library provides an abstraction of the messaging subsystem that is used by device drivers, middleware libraries and
applications to receive and control interrupts in real time.
and supporting text
5.7.6.4.2 Library Overview
The following diagram describes the major components of the usage model.
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Library Usage Model
Each of the blocks in the diagram correspond to the library interface section.
Library Interface Section Description
Initialization, Tasks, and Versioning Functions Provides
Mailbox Functions Provides
Message Type Functions Provides
Message Send/Receive Functions Provides
Utility Functions Provides
Configuration Functions Provides
5.7.6.4.3 How the Library Works
The Messaging System Service Library can be used by a device driver, middleware layer, or application to provide access to,
and control over, interrupts to the processor.
Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the modes
supported for your device.
5.7.6.5 Configuring the Library
The file framework/system/msg/config/sys_msg_config.h provides configuration parameters that the implementer can use to
adapt the System Messaging Service library to a particular application.
By default, the system message format provides 64 bits of information in a message:
typedef union
{
struct
{
uint16_t param0; // Message parameter zero
uint16_t param1; // Message parameter one
uint16_t param2; // Message parameter two
uint16_t nMessageTypeID; // Message type identifier
};
struct
{
uint16_t nSource; // Message source identifier
uintptr_t * pData; // Pointer to additional message data
};
} SYS_MSG_OBJECT;
The only required field in the message format definition is nMessageTypeID. But it doesn't need to be 16 bits long.
The maximum number of mailboxes is defined by:
#define SYS_MSG_MAX_MAILBOXES (32)
The minimum number of mailboxes is one.
The maximum number of message types is defined by:
#define SYS_MSG_MAX_TYPES (32)
The minimum number of message types is one.
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Message priorities run from zero to SYS_MSG_MAX_PRIORITY, which is defined by:
#define SYS_MSG_MAX_PRIORITY (4)
For each message priority from 0,1, to SYS_MSG_MAX_PRIORITY a queue is created. The size of each queue is defined by:
// Message Priority: 0 1 2 3 4
#define SYS_MSG_BUFFER_SIZES { 64, 32, 16, 8, 4 }
In this example there are five priorities, 0,1,..4, and the sizes of each message queue is provided in the definition of
SYS_MSB_BUFFER_SIZES.
Then this information is used when initializing the System Messaging Service in the application startup code:
SYS_OBJ_HANDLE hSysMsg;
{//SYS_MSG_Initialize
uint16_t nQSizes[] = SYS_MSG_BUFFER_SIZES;
hSysMsg = SYS_MSG_Initialize(SYS_MSG_MAX_PRIORITY+1,nQSizes);
SYS_ASSERT( SYS_OBJ_HANDLE_INVALID != hSysMsg,"Bad hSysMsg!" );
}
5.7.6.6 Building the Library
This section list the files that are available in the \src of the System Message Service Library driver. It lists which files need to be
included in the build based on either a hardware feature present on the board or configuration option selected by the system.
5.7.6.7 Library Interface
Data Types and Constants
Name Description
SYS_MSG_INIT Contains all the data necessary to initialize an instance of the System
Messaging Service.
SYS_MSG_INSTANCE System Messaging instances numbering is from 0,1, to
SYS_MSG_MAX_INSTANCE.
SYS_MSG_OBJECT This is type SYS_MSG_OBJECT.
SYS_MSG_QUEUE_STATUS Messaging queue status enumeration.
SYS_MSG_RECEIVE_CALLBACK Pointer to the System Message Received Callback Function
SYS_MSG_RESULTS Enumeration of message send results.
SYS_MSGQ_ELEMENT Defines queue element for message queue belonging to each priority.
_SYS_MSG_H This is macro _SYS_MSG_H.
_SYS_MSG_OBJECT Defines the contents of a system message.
SYS_MSG_MAILBOXES_ADDONE don't need to round up the number of bitmaps
SYS_MSG_NUM_MAILBOX_BITMAPS This is macro SYS_MSG_NUM_MAILBOX_BITMAPS.
Configuration Functions
Name Description
SYS_MSG_BUFFER_SIZES define SYS_MSG_BUFFER_SIZES { 4, 4, 4, 4, 1
SYS_MSG_MAX_MAILBOXES Specifies the maximum number of mailboxes possible.
SYS_MSG_MAX_MSGS_DELIVERED Specifies the maximum number of messages delivered per each call to
SYS_MSG_Tasks.
SYS_MSG_MAX_PRIORITY Specifies the maximum message priority.
SYS_MSG_MAX_TYPES Specifies the maximum number of message types possible.
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Initialization, Tasks, and Versioning Functions
Name Description
SYS_MSG_Deinitialize Deinitializes System Messaging Instance.
SYS_MSG_Initialize Configures and initializes the messaging subsystem.
SYS_MSG_Tasks System Messaging Service Tasks routine.
SYS_MSG_VersionGet Gets the System Messaging Service version in numerical format.
SYS_MSG_VersionStrGet Gets System Messaging Service version in string format.
Mailbox Functions
Name Description
SYS_MSB_MailboxClose Closes (destroys) a mailbox previously opened with SYS_MSB_MailboxOpen.
SYS_MSB_MailboxOpen Opens a system messaging mailbox.
SYS_MSB_MailboxReinit Reinitialize previously opened mailbox.
SYS_MSG_MailboxMessagesGet Get queued messages for a mailbox.
SYS_MSG_MailboxMsgAdd Adds a message type to the list of messages received by a mailbox.
SYS_MSG_MailboxMsgRemove Removes a message type from the list of messages received by a mailbox.
Message Send/Receive Functions
Name Description
SYS_MSG_GotMessages Returns true if system messaging has undelivered messages, false otherwise.
SYS_MSG_MessageDeliver Deliver message to mailboxes.
SYS_MSG_MessageReceive Receive next message in message queues.
SYS_MSG_MessageSend Sends a message, as defined by a message structure.
Message Type Functions
Name Description
SYS_MSG_TypeCreate Creates a new message type.
SYS_MSG_TypeRemove Removes an existing message type.
Utility Functions
Name Description
SYS_MSG_ID2hMsgType Translates message type identifier into handle of corresponding message type
object.
SYS_MSG_QueueStatus Returns message queue status for a given message priority.
Description
5.7.6.7.1 Initialization, Tasks, and Versioning Functions
5.7.6.7.1.1 SYS_MSG_Deinitialize Function
C
void SYS_MSG_Deinitialize(
SYS_OBJ_HANDLE handleSysMsg
);
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Description
Deinitializes System Messaging Instance and frees up allocated memory for it.
Preconditions
None.
Parameters
Parameters Description
hSysMsg handle to System Messaging Object for instance to be removed.
Returns
None.
Remarks
None.
Example
SYS_OBJ_HANDLE hSysMsg;
uint16_t nQSizes[] = SYS_MSG_BUFFER_SIZES;
// Initialize the messaging system. This needs to done in the initialization code.
// Choose System Messaging instance that supports 8 byte messages
hSysMsg = SYS_MSG_Initialize(SYS_MSG_8Bytes,SYS_MSG_MAX_PRIORITY+1,nQSizes);
if (SYS_OBJ_HANDLE_INVALID == hSysMsg)
{
// Handle error
}
.
.
.
// Remove this instance.
SYS_MSG_Deinitialize( hSysMsg );
5.7.6.7.1.2 SYS_MSG_Initialize Function
C
SYS_OBJ_HANDLE SYS_MSG_Initialize(
const SYS_MSG_INSTANCE iSysMsg,
SYS_OBJ_HANDLE pInitializeSysMsg
);
Description
This routine configures and initializes the messaging subsystem appropriately for the current system design.
Preconditions
None.
Parameters
Parameters Description
iSysMsg Index of System Messaging Service to be initialized.
pInitSysMsg Pointer to System Messaging initialization data structure. If NULL default config
values are used.
Returns
Handle to the System Messaging object created. Returns SYS_OBJ_HANDLE_INVALID if allocation of data structure fails.
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Returns SYS_OBJ_HANDLE_INVALID if pointer to initialization data structure is NULL.
Remarks
None.
Example
SYS_OBJ_HANDLE hSysMsg;
SYS_MSG_INIT sInitSysMsg = { 0, (SYS_MSG_MAX_PRIORITY+1), { SYS_MSG_BUFFER_SIZES } };
//uint16_t nQSizes[] = SYS_MSG_BUFFER_SIZES;
// Initialize the messaging system. This needs to done in the initialization code.
// Choose System Messaging instance that supports 8 byte messages
hSysMsg = SYS_MSG_Initialize(SYS_MSG_8Bytes,&sInitSysMsg);
if (SYS_OBJ_HANDLE_INVALID == hSysMsg)
{
// Handle error
}
5.7.6.7.1.3 SYS_MSG_Tasks Function
C
void SYS_MSG_Tasks(
SYS_OBJ_HANDLE handleSysMsg
);
Description
System Messaging Service Tasks routine.
Preconditions
hSysMsg must have been returned from a call to SYS_MSG_Initialize.
Parameters
Parameters Description
hSysMsg handle to System Messaging Object.
Returns
None.
Remarks
None.
Example
while ( SYS_MSG_GotMessages(iSysMsg) )
{
SYS_MSG_Tasks(hSysMsg);
}
5.7.6.7.1.4 SYS_MSG_VersionGet Function
C
unsigned int SYS_MSG_VersionGet();
Description
This routine gets the System Messaging Service version. The version is encoded as major * 10000 + minor * 100 + patch. The
stringized version can be obtained using SYS_MSG_VersionStrGet()
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Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the object instance to get the version for.
Returns
Current System Messaging Service version in numerical format.
Remarks
None.
Example
unsigned int version;
version = SYS_MSG_VersionGet();
if(version < 110200)
{
// Do Something
}
5.7.6.7.1.5 SYS_MSG_VersionStrGet Function
C
char * SYS_MSG_VersionStrGet();
Description
This routine gets the System Messaging Service version. The version is returned as major.minor.path[type], where type is
optional. The numerical version can be obtained using SYS_MSG_VersionGet()
Preconditions
None.
Parameters
Parameters Description
drvIndex Identifier for the object instance to get the version for.
Returns
Current System Messaging Service version in the string format.
Remarks
None.
Example
char *version;
version = SYS_MSG_VersionStrGet();
printf("%s", version);
5.7.6.7.2 Mailbox Functions
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5.7.6.7.2.1 SYS_MSB_MailboxClose Function
C
void SYS_MSB_MailboxClose(
SYS_OBJ_HANDLE hMailbox
);
Description
Closes (destroys) a mailbox previously opened with SYS_MSB_MailboxOpen.
Preconditions
hMailbox provided by call to SYS_MSB_MailboxOpen.
Parameters
Parameters Description
hMailbox Handle to mailbox that is to be closed (destroyed).
Returns
None.
None.
Example
SYS_OBJ_HANDLE hMyMailbox;
hMyMailbox = SYS_MSB_MailboxOpen( iSysMsg, &myCallBackFunction );
SYS_MSB_MailboxClose(hMyMailbox);
5.7.6.7.2.2 SYS_MSB_MailboxOpen Function
C
SYS_OBJ_HANDLE SYS_MSB_MailboxOpen(
const SYS_MSG_INSTANCE iSysMsg,
SYS_MSG_RECEIVE_CALLBACK msgCallBackFunction
);
Description
Opens a system messaging mailbox, providing a message callback function that is called whenever a message is received.
Preconditions
iSysMsg must have been used in a call to SYS_MSG_Initialize. Message callback function will not be called until
SYS_MSG_MailboxSignUp has been used to sign up the mailbox for messages of interest.
Parameters
Parameters Description
iSysMsg Index of System Messaging Service instance.
msgCallBackFunction pointer to message callback function
Returns
Handle to new system messaging mailbox.
Remarks
A null callback function disables messaging callbacks.
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Example
SYS_OBJ_HANDLE hMyMailbox;
hMyMailbox = SYS_MSB_MailboxOpen( iSysMsg, &myCallBackFunction );
if (SYS_OBJ_HANDLE_INVALID == SYS_MSG_TypeRemove)
{
// Handle error
}
5.7.6.7.2.3 SYS_MSB_MailboxReinit Function
C
void SYS_MSB_MailboxReinit(
SYS_OBJ_HANDLE hMailbox,
SYS_MSG_RECEIVE_CALLBACK msgCallBackFunction
);
Description
Reinitialize previously opened mailbox by providing new call back function and clearing all message type assignments.
Preconditions
hMailbox provided by call to SYS_MSB_MailboxOpen.
Parameters
Parameters Description
hMailbox Object handle to mailbox
msgCallBackFunction pointer to new message callback function
Remarks
A null callback function disables messaging callbacks.
Example
SYS_OBJ_HANDLE hMyMailbox;
hMyMailbox = SYS_MSB_MailboxOpen( iSysMsg, &myCallBackFunction );
SYS_MSB_MailboxReinit(hMyMailbox,&anotherCallBackFunction );
5.7.6.7.2.4 SYS_MSG_MailboxMessagesGet Function
C
SYS_MSG_OBJECT * SYS_MSG_MailboxMessagesGet(
SYS_OBJ_HANDLE hMailbox
);
Description
Get queued messages for a mailbox. Messages returned by this function will not be received via the mailbox's callback function.
Preconditions
hMailbox provided by call to SYS_MSB_MailboxOpen.
Parameters
Parameters Description
hMailbox Object handle to mailbox
Returns
Pointer to next message in the queue(s) that is of interest to the mailbox. Function returns NULL if no messages are found in the
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queue.
Remarks
None.
Example
SYS_MSG_OBJECT *pNextMessage;
while ( NULL != (pNextMessage = SYS_MSG_MailboxMessagesGet(hMyMailbox)) )
{
// Process message at *pNextMessage.
}
5.7.6.7.2.5 SYS_MSG_MailboxMsgAdd Function
C
void SYS_MSG_MailboxMsgAdd(
SYS_OBJ_HANDLE hMailbox,
SYS_OBJ_HANDLE hMsgType
);
Description
Adds a message type to the list of messages received by a mailbox.
Preconditions
hMailbox provided by call to SYS_MSB_MailboxOpen.
Parameters
Parameters Description
hMailbox Object handle to mailbox
hMsgType Handle to message type of interest for this mailbox.
Returns
None.
Remarks
When the message type handle is unknown but the message ID is known use SYS_MSG_ID2hMsgType to provide the message
type handle. See code example.
Example
const SYS_MSG_INSTANCE iSysMsg;
SYS_OBJ_HANDLE hMsgType[5], hMailbox[3];
// Create three mailboxes
hMailbox[0] = SYS_MSB_MailboxOpen( iSysMsg, &myCallBack0 );
hMailbox[1] = SYS_MSB_MailboxOpen( iSysMsg, &myCallBack1 );
hMailbox[2] = SYS_MSB_MailboxOpen( iSysMsg, &myCallBack2 );
// Create five message types
// Message ID: :Priority
hMsgType[0] = SYS_MSG_TypeCreate(iSysMsg,1<<0,0);
hMsgType[1] = SYS_MSG_TypeCreate(iSysMsg,1<<1,1);
hMsgType[2] = SYS_MSG_TypeCreate(iSysMsg,1<<2,2);
hMsgType[3] = SYS_MSG_TypeCreate(iSysMsg,1<<3,3);
hMsgType[4] = SYS_MSG_TypeCreate(iSysMsg,1<<4,4);
// Add messages to each mailbox
SYS_MSG_MailboxMsgAdd(hMailbox[0],hMsgType[0]);
SYS_MSG_MailboxMsgAdd(hMailbox[1],hMsgType[1]);
SYS_MSG_MailboxMsgAdd(hMailbox[2],hMsgType[2]);
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SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<1));
SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<2));
SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<3));
SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<4));
5.7.6.7.2.6 SYS_MSG_MailboxMsgRemove Function
C
void SYS_MSG_MailboxMsgRemove(
SYS_OBJ_HANDLE hMailbox,
SYS_OBJ_HANDLE hMsgType
);
Description
Removes a message type from the list of messages received by a mailbox.
Preconditions
hMailbox provided by call to SYS_MSB_MailboxOpen.
Parameters
Parameters Description
hMailbox Object handle to mailbox
hMsgType Handle to message type to be ignored by this mailbox.
Returns
None.
Remarks
When the message type handle is unknown but the message ID is known use SYS_MSG_ID2hMsgType to provide the message
type handle. See code example.
Example
const SYS_MSG_INSTANCE iSysMsg;
SYS_OBJ_HANDLE hMsgType[5], hMailbox[3];
// Create three mailboxes
hMailbox[0] = SYS_MSB_MailboxOpen( iSysMsg, &myCallBack0 );
hMailbox[1] = SYS_MSB_MailboxOpen( iSysMsg, &myCallBack1 );
hMailbox[2] = SYS_MSB_MailboxOpen( iSysMsg, &myCallBack2 );
// Create five message types
// Message ID: :Priority
hMsgType[0] = SYS_MSG_TypeCreate(iSysMsg,1<<0,0);
hMsgType[1] = SYS_MSG_TypeCreate(iSysMsg,1<<1,1);
hMsgType[2] = SYS_MSG_TypeCreate(iSysMsg,1<<2,2);
hMsgType[3] = SYS_MSG_TypeCreate(iSysMsg,1<<3,3);
hMsgType[4] = SYS_MSG_TypeCreate(iSysMsg,1<<4,4);
// Add messages to each mailbox
SYS_MSG_MailboxMsgAdd(hMailbox[0],hMsgType[0]);
SYS_MSG_MailboxMsgAdd(hMailbox[1],hMsgType[1]);
SYS_MSG_MailboxMsgAdd(hMailbox[2],hMsgType[2]);
SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<1));
SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<2));
SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<3));
SYS_MSG_MailboxMsgAdd(hMailbox[0],SYS_MSG_ID2hMsgType(iSysMsg,1<<4));
5.7.6.7.3 Message Type Functions
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5.7.6.7.3.1 SYS_MSG_TypeCreate Function
C
SYS_OBJ_HANDLE SYS_MSG_TypeCreate(
const SYS_MSG_INSTANCE iSysMsg,
uint8_t nMessageTypeID,
uint8_t nMessagePriority
);
Description
Creates a new message type, defining an integer message type and priority.
Preconditions
iSysMsg must have been used in a call to SYS_MSG_Initialize.
Parameters
Parameters Description
iSysMsg Index of System Messaging Service instance.
nMessageTypeID Integer message type identifier
nMessagePriority Message priority, between 0 and SYS_MSG_MAX_PRIORITIES
Returns
Handle to new message type definition.
Remarks
None.
Example
SYS_OBJ_HANDLE hMsgType;
hMsgType = SYS_MSG_TypeCreate( iSysMsg, 1, 3 );
if (SYS_OBJ_HANDLE_INVALID == hMsgType)
{
// Handle error
}
5.7.6.7.3.2 SYS_MSG_TypeRemove Function
C
void SYS_MSG_TypeRemove(
SYS_OBJ_HANDLE hMsgType
);
Description
Remmoves an existing message type.
Preconditions
None.
Parameters
Parameters Description
hMsgType Handle to message type that is to be removed
Returns
None.
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Remarks
When the message type handle is unknown but the message ID is known use SYS_MSG_ID2hMsgType to provide the message
type handle. See code example.
Example
SYS_OBJ_HANDLE hMsgType;
hMsgType = SYS_MSG_TypeCreate( iSysMsg, 1, 3 );
SYS_MSG_TypeRemove( hMsgType );
Alternately:
SYS_OBJ_HANDLE hMsgType;
hMsgType = SYS_MSG_TypeCreate( iSysMsg, 1, 3 );
SYS_MSG_TypeRemove( SYS_MSG_ID2hMsgType(iSysMsg,1) );
5.7.6.7.4 Message Send/Receive Functions
5.7.6.7.4.1 SYS_MSG_GotMessages Function
C
bool SYS_MSG_GotMessages(
const SYS_MSG_INSTANCE iSysMsg
);
Description
Returns true if system messaging has undelivered messages, false otherwise.
Preconditions
iSysMsg must have been used in a call to SYS_MSG_Initialize.
Parameters
Parameters Description
iSysMsg Index of System Messaging Service instance.
Returns
True if there are undelivered system messages, false otherwise.
Remarks
None.
Example
DBPRINTF("rnGot Messages: %drn",SYS_MSG_GotMessages(iSysMsg));
while ( (pNextMessage = SYS_MSG_MessageReceive(iSysMsg)) != NULL )
{
SYS_MSG_MessageDeliver(iSysMsg,pNextMessage);
DBPRINTF("rn");
}
DBPRINTF("Got Messages: %drn",SYS_MSG_GotMessages(ihSysMsg));
5.7.6.7.4.2 SYS_MSG_MessageDeliver Function
C
void SYS_MSG_MessageDeliver(
const SYS_MSG_INSTANCE iSysMsg,
SYS_MSGQ_ELEMENT * pQElement
);
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Description
Deliver message to mailboxes, remove message from queue when done.
Preconditions
iSysMsg must have been used in a call to SYS_MSG_Initialize.
Parameters
Parameters Description
iSysMsg Index of System Messaging Service instance.
pQElement pointer to queue element to be delivered.
Returns
None.
Remarks
None.
Example
SYS_MSGQ_ELEMENT *pQElement;
SYS_MSG_OBJECT nextMessage;
while ( (pQElement = SYS_MSG_MessageReceive(iSysMsg)) != NULL )
{
// In case you desire to examine message before delivering it.
nextMessage = pQElement->sMessage;
// Deliver message to all interested mailboxes
SYS_MSG_MessageDeliver(iSysMsg,pQElement);
}
5.7.6.7.4.3 SYS_MSG_MessageReceive Function
C
SYS_MSGQ_ELEMENT * SYS_MSG_MessageReceive(
const SYS_MSG_INSTANCE iSysMsg
);
Description
Receive next message in message queues, returning NULL if queues are empty.
Preconditions
iSysMsg must have been used in a call to SYS_MSG_Initialize.
Parameters
Parameters Description
iSysMsg Index of System Messaging Service instance.
Returns
Pointer to next message, as found in a message queue element, NULL if there are no messages.
Remarks
None.
Example
SYS_MSGQ_ELEMENT *pQElement;
SYS_MSG_OBJECT nextMessage;
while ( (pQElement = SYS_MSG_MessageReceive(iSysMsg)) != NULL )
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{
// In case you desire to examine message before delivering it.
nextMessage = pQElement->sMessage;
// Deliver message to all interested mailboxes
SYS_MSG_MessageDeliver(iSysMsg,pQElement);
}
5.7.6.7.4.4 SYS_MSG_MessageSend Function
C
SYS_MSG_RESULTS SYS_MSG_MessageSend(
const SYS_MSG_INSTANCE iSysMsg,
SYS_MSG_OBJECT * pMessage
);
Description
Sends a message, as defined by a message structure.
Preconditions
iSysMsg must have been used in a call to SYS_MSG_Initialize.
Parameters
Parameters Description
iSysMsg Index of System Messaging Service instance.
pMessage Pointer to message definition.
Returns
Message result from SYS_MSG_RESULTS enumeration.
Remarks
None.
Example
SYS_MSG_OBJECT myMessage;
SYS_MSG_RESULTS myMessageStatus;
SYS_OBJ_HANDLE hMyMsgType;
hMyMsgType = SYS_MSG_TypeCreate( iSysMsg, 1, 3 );
if (SYS_OBJ_HANDLE_INVALID == hMyMsgType)
{
// Handle error
}
myMessage.hMsgType = hMyMsgType;
myMessage.nSource = myMsgSource;
myMessage.param1 = parameterOneValue;
myMessage.param1 = parameterTwoValue;
myMessageStatus = SYS_MSG_MessageSend(iSysMsg,&myMessage);
SYS_ASSERT( myMessageStatus > 0, "Bad message status!" );
5.7.6.7.5 Utility Functions
5.7.6.7.5.1 SYS_MSG_ID2hMsgType Function
C
SYS_OBJ_HANDLE SYS_MSG_ID2hMsgType(
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const SYS_MSG_INSTANCE iSysMsg,
uint8_t nMessageTypeID
);
Description
Translates message type identifier into handle of corresponding message type object.
Preconditions
iSysMsg must have been used in a call to SYS_MSG_Initialize.
Parameters
Parameters Description
iSysMsg Index of System Messaging Service instance.
nMessageTypeID Integer message type identifier.
Returns
Handle to message type definition object corresponding to the message type identifier. Returns NULL if the message type is not
defined.
Remarks
This function is useful in situations where the message type identifier is known but the message type handle is not. This allows
applications to statically define message type IDs and use them in code instead of having to wait until message handles are
known and then dynamically sharing message handles via global variables.
Example
#define MY_MESSAGE_TYPE_ID 1;
// Create message type
SYS_OBJ_HANDLE hMsgType;
uint8_t nPriority = 3;
hMsgType = SYS_MSG_TypeCreate( iSysMsg, MY_MESSAGE_TYPE_ID, nPriority );
if (SYS_OBJ_HANDLE_INVALID == hMsgType)
{
// Handle error
}
.
.
.
// Remove message type without knowing message type handle
SYS_MSG_TypeRemove(iSysMsg,SYS_MSG_ID2hMsgType(iSysMsg,MY_MESSAGE_TYPE_ID));
5.7.6.7.5.2 SYS_MSG_QueueStatus Function
C
SYS_MSG_QUEUE_STATUS SYS_MSG_QueueStatus(
const SYS_MSG_INSTANCE iSysMsg,
uint8_t nMessagePriority
);
Description
Returns message queue status for a given message priority.
Preconditions
iSysMsg must have been used in a call to SYS_MSG_Initialize.
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Parameters
Parameters Description
iSysMsg Index of System Messaging Service instance.
nMessagePriority message priority of interest, from zero to SYS_MSG_MAX_PRIORITIES.
Returns
Number of messages in queue if not full or SYS_MSG_QUEUE_FULL if full. If message priority is not legal, returns
SYS_MSG_QUEUE_BAD.
Remarks
None.
Example
5.7.6.7.6 Configuration Functions
5.7.6.7.6.1 SYS_MSG_BUFFER_SIZES Macro
C
#define SYS_MSG_BUFFER_SIZES { 16 }
Description
define SYS_MSG_BUFFER_SIZES { 4, 4, 4, 4, 1
5.7.6.7.6.2 SYS_MSG_MAX_MAILBOXES Macro
C
#define SYS_MSG_MAX_MAILBOXES (2)
Description
System Messaging Max Number of Mailboxes
Specifies the maximum number of mailboxes possible.
Remarks
Minimum number is 1 mailbox.
5.7.6.7.6.3 SYS_MSG_MAX_MSGS_DELIVERED Macro
C
#define SYS_MSG_MAX_MSGS_DELIVERED (1)
Description
System Messaging Maximum Number of Messages Delivered per call to SYS_MSG_Tasks
Specifies the maximum number of messages delivered per each call to SYS_MSG_Tasks. If zero then all message queues are
emptied before the tasks routine finishes execution.
Remarks
0 implies all queues are empty after SYS_MSG_Tasks is done.
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5.7.6.7.6.4 SYS_MSG_MAX_PRIORITY Macro
C
#define SYS_MSG_MAX_PRIORITY (0)
Description
System Messaging Maximum Priority
Specifies the maximum message priority.
Remarks
Message priorities run from 0 to SYS_MSG_MAX_PRIORITIES. The number of message queues is
SYS_MSG_MAX_PRIORITIES+1.
5.7.6.7.6.5 SYS_MSG_MAX_TYPES Macro
C
#define SYS_MSG_MAX_TYPES (2)
Description
System Messaging Max Number of Message Types
Specifies the maximum number of message types possible.
Remarks
Minimum number is 1.
5.7.6.7.7 Data Types and Constants
5.7.6.7.7.1 SYS_MSG_INIT Structure
C
typedef struct {
uint8_t nMaxMsgsDelivered;
uint8_t nMessagePriorities;
uint16_t * nQSizes;
} SYS_MSG_INIT;
Description
System Messaging Service Initialization Data
Contains all the data necessary to initialize an instance of the System Messaging Service.
Members
Members Description
uint8_t nMaxMsgsDelivered; Maximum number of messages delivered per call to SYS_MSG_Tasks
uint8_t nMessagePriorities; Number of message priorities desired
uint16_t * nQSizes; Array of qukeue sizes for priorities 0,1,...SYS_MSG_MAX_PRIORITY
Remarks
A pointer to a structure of this format containing the desired initialization data must be passed into the SYS_MSG_Initialize
routine. If nMaxMsgsDelivered == 0 then ALL messages in priority queues are delivered each time SYS_MSG_Tasks is called.
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5.7.6.7.7.2 SYS_MSG_INSTANCE Enumeration
C
typedef enum {
SYS_MSG_0,
SYS_MSG_1,
SYS_MSG_2,
SYS_MSG_3,
SYS_MSG_4,
SYS_MSG_NUM_INSTANCES
} SYS_MSG_INSTANCE;
Description
Enumeration of the Allowable of System Messaging Instances
System Messaging instances numbering is from 0,1, to SYS_MSG_MAX_INSTANCE.
Remarks
None.
5.7.6.7.7.3 SYS_MSG_OBJECT Structure
C
typedef struct {
union {
struct {
uint8_t nMessageTypeID;
uint8_t nSource;
uint16_t param0;
uint16_t param1;
uint16_t param2;
}
struct {
uint16_t dummy;
uint16_t nSizeData;
uintptr_t * pData;
}
}
} SYS_MSG_OBJECT;
Description
This is type SYS_MSG_OBJECT.
Members
Members Description
uint8_t nMessageTypeID; Message type identifier
uint8_t nSource; Message source identifier
uint16_t param0; Message parameter zero
uint16_t param1; Message parameter one
uint16_t param2; Message parameter two
uint16_t nSizeData; Size of data that pData identifies
uintptr_t * pData; Pointer to additional message data
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5.7.6.7.7.4 SYS_MSG_QUEUE_STATUS Enumeration
C
typedef enum {
SYS_MSG_QUEUE_BAD,
SYS_MSG_QUEUE_FULL,
SYS_MSG_QUEUE_EMPTY
} SYS_MSG_QUEUE_STATUS;
Description
System Messaging Queue Status Enumeration
Messaging queue status enumeration. Positive values indicate number of messages in the queue.
Members
Members Description
SYS_MSG_QUEUE_BAD QUEUE Status: full
SYS_MSG_QUEUE_FULL QUEUE Status: full
SYS_MSG_QUEUE_EMPTY QUEUE Status: empty
Remarks
None.
5.7.6.7.7.5 SYS_MSG_RECEIVE_CALLBACK Type
C
typedef void (* SYS_MSG_RECEIVE_CALLBACK)(SYS_MSG_OBJECT *pMessage);
Description
Pointer to the System Message Received Callback Function
Pointer to the function provided for each system messaging mailbox that is called when a system message is received for each
mailbox.
5.7.6.7.7.6 SYS_MSG_RESULTS Enumeration
C
typedef enum {
SYS_MSG_NOT_SENT_QFULL,
SYS_MSG_BAD_PRIORITY,
SYS_MSG_BAD_MSGTYPE,
SYS_MSG_NOT_SENT,
SYS_MSG_SENT
} SYS_MSG_RESULTS;
Description
System Messaging Results Enumeration
Enumeration of message send results.
Members
Members Description
SYS_MSG_NOT_SENT_QFULL Message could not be sent, no room available in priority queues
SYS_MSG_BAD_PRIORITY Message could not be sent, Message Message priority bad
SYS_MSG_BAD_MSGTYPE Message could not be sent, Message type bad
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SYS_MSG_NOT_SENT Message could not be sent, no other information available
SYS_MSG_SENT Message sent
Remarks
SYS_MSG_SENT aligns with SYS_MSGQ_Success. SYS_MSG_NOT_SENT aligns with SYS_MSGQ_Failure
5.7.6.7.7.7 SYS_MSGQ_ELEMENT Structure
C
typedef struct {
SYS_MSG_OBJECT sMessage;
uint16_t mailboxInterestBitMap[SYS_MSG_NUM_MAILBOX_BITMAPS];
} SYS_MSGQ_ELEMENT;
Description
System Messaging Queues Element
Defines queue element for message queue belonging to each priority.
Members
Members Description
SYS_MSG_OBJECT sMessage; System Message Bit map for mailboxes interested in this message type, modified
as each mailbox is notified.
Remarks
None
5.7.6.7.7.8 _SYS_MSG_H Macro
C
#define _SYS_MSG_H
Description
This is macro _SYS_MSG_H.
5.7.6.7.7.9 _SYS_MSG_OBJECT Macro
C
#define _SYS_MSG_OBJECT
Description
System Message Format
Defines the contents of a system message. This information is copied into an element of the system message queue identified
by the message priority.
Remarks
None
5.7.6.7.7.10 SYS_MSG_MAILBOXES_ADDONE Macro
C
#define SYS_MSG_MAILBOXES_ADDONE 0
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Description
don't need to round up the number of bitmaps
5.7.6.7.7.11 SYS_MSG_NUM_MAILBOX_BITMAPS Macro
C
#define SYS_MSG_NUM_MAILBOX_BITMAPS (SYS_MSG_MAX_MAILBOXES/16 + SYS_MSG_MAILBOXES_ADDONE)
Description
This is macro SYS_MSG_NUM_MAILBOX_BITMAPS.
5.7.6.8 Files
Files
Name Description
sys_msg.h System Service for the messaging module.
sys_msg_config.h System Messaging Configuration definitions file
Description
5.7.6.8.1 sys_msg.h
Messaging System-Library Interface Definition
This file contains the interface definition for the messaging system service. It provides a way to interact with the messaging
subsystem.
Enumerations
Name Description
SYS_MSG_INSTANCE System Messaging instances numbering is from 0,1, to
SYS_MSG_MAX_INSTANCE.
SYS_MSG_QUEUE_STATUS Messaging queue status enumeration.
SYS_MSG_RESULTS Enumeration of message send results.
Functions
Name Description
SYS_MSB_MailboxClose Closes (destroys) a mailbox previously opened with SYS_MSB_MailboxOpen.
SYS_MSB_MailboxOpen Opens a system messaging mailbox.
SYS_MSB_MailboxReinit Reinitialize previously opened mailbox.
SYS_MSG_Deinitialize Deinitializes System Messaging Instance.
SYS_MSG_GotMessages Returns true if system messaging has undelivered messages, false otherwise.
SYS_MSG_ID2hMsgType Translates message type identifier into handle of corresponding message type
object.
SYS_MSG_Initialize Configures and initializes the messaging subsystem.
SYS_MSG_MailboxMessagesGet Get queued messages for a mailbox.
SYS_MSG_MailboxMsgAdd Adds a message type to the list of messages received by a mailbox.
SYS_MSG_MailboxMsgRemove Removes a message type from the list of messages received by a mailbox.
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SYS_MSG_MessageDeliver Deliver message to mailboxes.
SYS_MSG_MessageReceive Receive next message in message queues.
SYS_MSG_MessageSend Sends a message, as defined by a message structure.
SYS_MSG_QueueStatus Returns message queue status for a given message priority.
SYS_MSG_Tasks System Messaging Service Tasks routine.
SYS_MSG_TypeCreate Creates a new message type.
SYS_MSG_TypeRemove Removes an existing message type.
SYS_MSG_VersionGet Gets the System Messaging Service version in numerical format.
SYS_MSG_VersionStrGet Gets System Messaging Service version in string format.
Macros
Name Description
_SYS_MSG_H This is macro _SYS_MSG_H.
_SYS_MSG_OBJECT Defines the contents of a system message.
SYS_MSG_MAILBOXES_ADDONE don't need to round up the number of bitmaps
SYS_MSG_NUM_MAILBOX_BITMAPS This is macro SYS_MSG_NUM_MAILBOX_BITMAPS.
SYS_OBJ_HANDLE_INVALID This is macro SYS_OBJ_HANDLE_INVALID.
SYS_OBJ_HANDLE_STATIC This is macro SYS_OBJ_HANDLE_STATIC.
Structures
Name Description
SYS_MSG_INIT Contains all the data necessary to initialize an instance of the System Messaging
Service.
SYS_MSG_OBJECT This is type SYS_MSG_OBJECT.
SYS_MSGQ_ELEMENT Defines queue element for message queue belonging to each priority.
Types
Name Description
SYS_MSG_RECEIVE_CALLBACK Pointer to the System Message Received Callback Function
SYS_OBJ_HANDLE SYS_MODULE_OBJ is badly named. It should be
SYS_MODULE_OBJ_HANDLE or something shorter. For brevity, it is
renamed to SYS_OBJ_HANDLE.
File Name
sys_msg.h
Company
Microchip Technology Incorported
5.7.6.8.2 sys_msg_config.h
System Messaging Configuration Definitions
These definitions statically define the operation of the System Messaging service.
Macros
Name Description
SYS_MSG_BUFFER_SIZES define SYS_MSG_BUFFER_SIZES { 4, 4, 4, 4, 1
SYS_MSG_MAX_MAILBOXES Specifies the maximum number of mailboxes possible.
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SYS_MSG_MAX_MSGS_DELIVERED Specifies the maximum number of messages delivered per each call to
SYS_MSG_Tasks.
SYS_MSG_MAX_PRIORITY Specifies the maximum message priority.
SYS_MSG_MAX_TYPES Specifies the maximum number of message types possible.
File Name
sys_msg_config.h
Company
Microchip Technology Incorported
5.7.7 Ports System Service Library
5.7.7.1 Introduction
Ports System Service Library
for
Microchip Microcontrollers
This library provides an interface to manage and control general purpose input or output ports (GPIO) controlled by the PORTx
modules on the Microchip families of microcontrollers.
Overview
One challenge designers of general purpose microcontroller devices face is to provide a large set of available peripheral features
on parts with a limited number of I/O pins. To help meet this challenge and to provide flexibilty for board designers, many parts
provide an ability to route I/O signals for selected peripherals to different I/O pins. Still, in some cases, general purpose I/O pins
must be used to implement the desired functionality under direct software control. The purpose of the ports system service is to
provide direct control if general purpose I/O pins and to support the selection of the desired peripheral functionality for supported
I/O pins and ports.
General purpose I/O pins can be controlled individually, but they are also grouped together in sets and can be controlled
together as a unit. These groups of GPIO pins are called "ports" on Microchip microcontrollers and this library provides the ability
to read and write data patterns to or from them in sets or as individual pins. In addition peripheral IO routing and pin/port control,
this library provides the ability to select and configure several other features of the I/O pins and ports available on Microchip
microcontrollers as described below.
Other Features
• Individual output pin/port open-drain enable/disable
• Individual input pin/port pull-up enable/disable
• Monitor select inputs and generate interrupt on mismatch condition [Change Notification]
• Operate during CPU Sleep and Idle modes
• Port line Analog/Digital Selection
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• Port slew rate control
Note: Trademarks and Intellectual Property are property of their respective owners. Customers are responsible for obtaining
appropriate licensing or rights before using this software.
5.7.7.2 Release Notes
MPLAB Harmony Version: v0.70b Ports System Service Library Library Version : 0.01 Release Date: %ReleaseNotes%
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.7.7.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED AS IS MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.7.7.4 Using the Library
This topic describes the basic architecture of the Ports System Service Library and provides information and examples on how to
use it.
Interface Header File: sys_ports.h
The interface to the Ports System Service Library is defined in the "sys_ports.h" header file, which is included by the "sys.h"
header file.
Any C language source (.c) file that uses the Ports System Service must include "sys.h".
5.7.7.4.1 Abstraction Model
This model explains how the system interfaces with the Ports System Service and the application as depicted in the below
diagram.
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General Purpose I/O:
All port pins have three registers directly associated with their operation as digital I/O. The Data Direction register determines
whether the pin is an input or an output. If the data direction bit is a ‘1’, then the pin is an input. All port pins are defined as inputs
after a Reset. Reads from the Output Latch register, read the latch. Writes to the latch, write the latch. Reads from the port, read
the port pins, while writes to the port pins, write the latch.
The pull-ups act as a current source or sink source connected to the pin, and eliminates the need for external resistors when
push-button or keypad devices are connected. These pull-ups prevent floating state of the pins by providing voltage to it. These
features are available on some pins and some parts. Please check the data sheet of the specific device for further information.
The open-drain feature allows the generation of outputs higher than VDD (e.g., 5V) on any desired digital only pins by using
external pull-up resistors. The maximum open-drain voltage allowed is the same as the maximum VIH specification.
The input change notification function of the I/O ports allows the microcontrollers to generate interrupt requests to the processor
in response to a change of state on selected input pins. This feature is capable of detecting input change of states even in Sleep
mode, when the clocks are disabled.
The Alternate Pin Function selections are used to steer specific peripheral input and output functions between different pins.
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The output slew rate of each port is programmable to select either the standard transition rate or a reduced transition rate of x
times the standard to minimize EMI. The reduced transition time is the default slew rate for all ports.
Peripheral Pin Select:
AVAILABLE PINS:
The number of available pins is dependent on the particular device and its pin count. Pins that support the peripheral pin select
feature include the designation “RPn” in their full pin designation, where “RP” designates a remappable peripheral and “n” is the
remappable port number.
AVAILABLE PERIPHERALS:
The peripherals managed by the peripheral pin select are all digital-only peripherals. These include general serial
communications (UART and SPI), general purpose timer clock inputs, timer-related peripherals (input capture and output
compare) and interrupt-on-change inputs.
In comparison, some digital-only peripheral modules are never included in the peripheral pin select feature. This is because the
peripheral’s function requires special I/O circuitry on a specific port and cannot be easily connected to multiple pins. These
modules include I2C among others. A similar requirement excludes all modules with analog inputs, such as the A/D converter. A
key difference between remappable and non-remappable peripherals is that remappable peripherals are not associated with a
default I/O pin. The peripheral must always be assigned to a specific I/O pin before it can be used. In contrast, non-remappable
peripherals are always available on a default pin, assuming that the peripheral is active and not conflicting with another
peripheral.
When a remappable peripheral is active on a given I/O pin, it takes priority over all other digital I/O and digital communication
peripherals associated with the pin. Priority is given regardless of the type of peripheral that is mapped. Remappable peripherals
never take priority over any analog functions associated with the pin.
INPUT MAPPING:
The inputs of the peripheral pin select options are mapped on the basis of the peripheral. That is, a control register associated
with a peripheral dictates the pin it will be mapped to.
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Note: For input only, peripheral pin select functionality does not have priority over I/Oport settings. Therefore, when configuring
Remappable Pin for input,the corresponding bit in the I/O port register must also be configured for input (set to '1').
OUTPUT MAPPING:
In contrast to inputs, the outputs of the peripheral pin select options are mapped on the basis of the pin. In this case, a control
register associated with a particular pin dictates the peripheral output to be mapped.
Mapping Limitations:
The control schema of the peripheral select pins is not limited to a small range of fixed peripheral configurations. There are no
mutual or hardware-enforced lockouts between any of the peripheral mapping SFRs. Literally any combination of peripheral
mappings across any or all of the RPn pins is possible. This includes both many-to-one and one-to-many mappings of peripheral
inputs and outputs to pins. While such mappings may be technically possible from a configuration point of view, they may not be
supportable from an electrical point of view.
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5.7.7.4.2 Library Overview
The Ports System Service Library is a MPLAB Harmony system service. Please refer to the system services documentation for a
detailed description of MPLAB system services.
The library interface routines are divided into various subsections, each subsection addresses one of the blocks or the overall
operation of the PORTx module.
Library Interface Section Description
Pin Control Functions Port bit/pin read/write/toggle/clear/set interfaces.
Ports Control Functions Port access read/write/toggle/clear/set interfaces.
Change Notification Functions Interface routines for Port line change notification.
Peripheral Pin Select Functions Interface routines for mapping the digital input/output to a specific PPS
Remappable input/output pin.
5.7.7.4.3 How the Library Works
5.7.7.4.3.1 Pin Control
Pins Functions Usage
Pin Read:
Port pin can be read at bit/pin level using "SYS_PORTS_PinRead" with appropriate parameters.
Pin Write:
Port pin can be written at bit/pin level using "SYS_PORTS_PinWrite" with appropriate parameters.
Pin Clear:
Port pin can be cleared at bit/pin level using "SYS_PORTS_PinClear" with appropriate parameters.
Pin Set:
Port pin can be set at bit/pin level using "SYS_PORTS_PinSet" with appropriate parameters.
Pin Direction Control:
Port pin direction can be set at bit/pin level using "SYS_PORTS_PinDirectionSelect" with appropriate parameters.
The Direction information can be obtained through the interface "SYS_PORTS_DirectionGet".
Pin Toggle:
Port pin can be toggled at bit/pin level using "SYS_PORTS_PinToggle" with appropriate parameters.
Pin Open Drain:
Port pin can be enabled open drain functionality at bit/pin level using "SYS_PORTS_PinOpenDrainEnable" with appropriate
parameters. Similarly, the Port pin can be disabled open drain functionality at bit/pin level using
"SYS_PORTS_PinOpenDrainDisable" with appropriate parameters.
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Pin Pull up:
Port pin can be enabled pull up functionality at bit/pin level using "SYS_PORTS_PinPullUpEnable" with appropriate parameters.
Similarly, the Port pin can be disabled pull up functionality at bit/pin level using "SYS_PORTS_PinPullUpDisable" with
appropriate parameters.
Example:
// PORT Direction setting for output
SYS_PORTS_PinDirectionSelect(MY_PORTS_INSTANCE, SYS_PORTS_DIRECTION_OUTPUT, MY_CHANNEL,
MY_PINNUM);
// PORT Direction setting for input
SYS_PORTS_PinDirectionSelect(MY_PORTS_INSTANCE, SYS_PORTS_DIRECTION_INPUT, MY_CHANNEL,
MY_PINNUM);
// Writing a value into a PORT
SYS_PORTS_PinWrite(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM, MY_VALUE);
// Reading back the previously written value
bool readData = SYS_PORTS_PinRead(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
// Clearing the PORT
SYS_PORTS_PinClear(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
// Setting the port
SYS_PORTS_PinSet(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
// Toggling a PORT
SYS_PORTS_PinToggle(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
Note: Not all the features are available on all devices. Please refer to the specific device data sheet to determine availability.
5.7.7.4.3.2 Ports Control
Port Functions Usage
Port Read:
Ports can be read at byte/word level using the interface "SYS_PORTS_Read" with appropriate parameters.
Port Write:
Ports can be written to at byte/word level using the interface "SYS_PORTS_Write" appropriate parameters.
Port Clear:
Ports can be cleared at byte/word level using the interface "SYS_PORTS_Clear" with appropriate parameters.
Port Set:
Ports can be set at byte/word level using the interface "SYS_PORTS_Set" with appropriate parameters.
Port Direction Control:
Ports direction can be set at byte/word level using the interface "SYS_PORTS_DirectionSelect" with appropriate parameters.
The Direction information can be obtained through the interface "SYS_PORTS_DirectionGet".
Port Toggle:
Ports can be toggled at byte/word level using the interface "SYS_PORTS_Toggle" with appropriate parameters.
Port Open Drain:
Ports can be enabled open drain functionality at byte/word level using the interface "SYS_PORTS_OpenDrainEnable" with
appropriate parameters. Similarly, the Ports can be disabled open drain functionality at byte/word level using the interface
"SYS_PORTS_OpenDrainDisable" with appropriate parameters.
Port Pull up:
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Ports can be enabled pull up functionality at byte/word level using the interface "SYS_PORTS_PullUpEnable" with appropriate
parameters. Similarly, the Ports can be disabled pull up functionality at byte/word level using the interface
"SYS_PORTS_PullUpDisable" with appropriate parameters.
Example:
// PORT Direction setting for output
SYS_PORTS_DirectionSelect(MY_PORTS_INSTANCE, SYS_PORTS_DIRECTION_OUTPUT, MY_CHANNEL,
(PORTS_DATA_MASK)0xFFFF);
// PORT Direction setting for input
SYS_PORTS_DirectionSelect(MY_PORTS_INSTANCE, SYS_PORTS_DIRECTION_INPUT, MY_CHANNEL,
(PORTS_DATA_MASK)0xFFFF);
// Writing a value into a PORT
SYS_PORTS_Write(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_TYPE)0x1234)
// Reading back the previously written value
PORTS_DATA_TYPE readData = SYS_PORTS_Read(MY_PORTS_INSTANCE, MY_CHANNEL);
// Clearing the PORT
SYS_PORTS_Clear(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF);
// Setting the port
SYS_PORTS_Set(MY_PORTS_INSTANCE, MY_CHANNEL, 0x1234, (PORTS_DATA_MASK)0x00FF);
// Toggling a PORT
SYS_PORTS_Toggle(MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF);
Note: Not all the features are available on all devices. Please refer to the specific device data sheet to determine availability.
5.7.7.4.3.3 Change Notification
Change Notification Feature Usage
The change notification feature can be enabled using "SYS_PORTS_ChangeNotificationEnable". This routine does the following
operations.
Change notification can be disabled after the successful usage using the interface "SYS_PORTS_ChangeNotificationDisable"
Certain microcontrollers support the global control over the change notification feature using the following interfaces
"SYS_PORTS_ChangeNotificationGlobalEnable" and "SYS_PORTS_ChangeNotificationGlobalDisable".
The status of the change notification pin can be obtained through interface "SYS_PORTS_ChangeNotificationStatus"
If there are any requirements to control the pull downs the following interfaces could be used,
"SYS_PORTS_ChangeNotificationPullDownEnable" and "SYS_PORTS_ChangeNotificationPullDownDisable"
If there are any requirements to control the pull ups the following interfaces could be used,
"SYS_PORTS_ChangeNotificationPullUpEnable" and "SYS_PORTS_ChangeNotificationPullUpDisable"
Change Notification Operation in Sleep and Idle Modes
The change notification module continues to operate during Sleep or Idle mode. Its operation can be enabled /disabled using the
interfaces "SYS_PORTS_ChangeNotificationInIdleModeEnable" / "SYS_PORTS_ChangeNotificationInIdleModeDisable"
If one of the enabled change notify pins changes states, the respective status bit will be set which can be monitored using the
interface "SYS_PORTS_ChangeNotificationStatus".
Example:
// Enabling the global change notification
SYS_PORTS_ChangeNotificationGlobalEnable(MY_PORTS_INSTANCE);
// Enabling weak pull-ups for the change notification PIN 10
SYS_PORTS_ChangeNotificationPullUpEnable(MY_PORTS_INSTANCE, PORTS_CHANGE_NOTICE_PIN_10);
// Enabling change notification on PIN 10
SYS_PORTS_ChangeNotificationEnable(MY_PORTS_INSTANCE, PORTS_CHANGE_NOTICE_PIN_10,
SYS_PORTS_PULLUP_ENABLE);
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// Enabling the change notification in idle mode.
SYS_PORTS_ChangeNotificationInIdleModeEnable(MY_PORTS_INSTANCE);
//Obtaining the status of the change notification pin.
bool status:
status = SYS_PORTS_ChangeNotificationStatus(MY_PORTS_INSTANCE, PORTS_CHANGE_NOTICE_PIN_10);
Note: Not all the features are available on all devices. Please refer to the specific device data sheet to determine availability.
5.7.7.4.3.4 Peripheral Pin Select
Ports Remapping or Peripheral Pin Select Usage
Input/Output Function Remapping:
"SYS_PORTS_RemapInputOutput" with appropriate parameters can be used to remap a particular port pin as input.output for a
peripheral.
Input/Output Lock:
"SYS_PORTS_IOLockEnable" and SYS_PORTS_IOLockDisable" with appropriate parameters can be used to lock/unlock a pin.
Example:
// Remapping input function 'Input Capture 1' to the Remappable input pin 'RPI1'
SYS_PORTS_RemapInputOutput(MY_PORTS_INSTANCE, PORTS_REMAP_FUNCTION_IC1,
PORTS_REMAP_PIN_RPI1);
// Remapping output function 'UART1 Transmit' to the Remappable output pin 'RP3'
SYS_PORTS_RemapInputOutput(MY_PORTS_INSTANCE, PORTS_REMAP_FUNCTION_U1TX,
PORTS_REMAP_PIN_RP3);
Note: Not all the features are available on all devices. Please refer to the specific device data sheet to determine availability.
5.7.7.4.3.5 Miscellaneous
Other Usage
Slew Rate:
Slew rate of a particular port can be controlled though the interface "SYS_PORTS_SlewRateSetReduced" and
"SYS_PORTS_SlewRateSetStandard".
Open Drain:
Peripheral based open drain can be controlled through the interfaces "SYS_PORTS_PeripheralOpenDrainEnable" and
"SYS_PORTS_PeripheralOpenDrainDisable".
Note: Not all the features are available on all devices. Please refer to the specific device data sheet to determine availability.
5.7.7.4.3.6 Special Considerations
Note on Ports Usage:
1. Setting a port pin as an analog input also requires that the corresponding direction be set. If the direction is set to output, the
digital output level (VOH or VOL) will be outputted.
2. When reading the port register, all pins configured as analog input channels will read as cleared.
3. Pins configured as digital inputs will not output an analog input. Analog levels on any pin that is defined as a digital input may
cause the input buffer to consume current that exceeds the device specifications.
4. Pull-ups and pull-downs on change notification pins should always be disabled when the port pin is configured as a digital
output.
Considerations for the Peripheral Pin Select:
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The ability to control Peripheral Pin Select options introduces several considerations into application design that could be
overlooked. This is particularly true for several common peripherals that are available only as remappable peripherals.
The main consideration is that the Peripheral Pin Selects are not available on default pins in the device’s default (Reset) state, all
Peripheral Pin Select inputs are tied to Vss and all Peripheral Pin Select outputs are disconnected. This situation requires the
user to initialize the device with the proper peripheral configuration before any other application code is executed. For application
safety, however, it is best to lock the configuration after writing to the control registers.
A final consideration is that Peripheral Pin Select functions neither override analog inputs, nor reconfigure pins with analog
functions for digital I/O. If a pin is configured as an analog input on device Reset, it must be explicitly reconfigured as digital I/O
when used with a Peripheral Pin Select.
Note: Not all the features are available on all devices. Please refer to the specific device data sheet to determine availability.
5.7.7.5 Configuring the Library
The configuration of the Ports System Service is based on the file sys_config.h
This header file contains the configuration selection for the PORTS System Service>. Based on the selections made, the Ports
System Service will support or not support selected features. These configuration settings will apply to all instances of the Ports
System Service.
This header can be placed anywhere, the path of this header needs to be present in the include search path for a successful
build. Refer to the Applications Overview section for more details.
5.7.7.6 Building the Library
5.7.7.7 Library Interface
Data Types and Constants
Name Description
SYS_PORTS_PIN_DIRECTION Defines the direction of the port pins.
SYS_PORTS_PULLUP_PULLDOWN_STATUS Provides the pull-up and pull-down status.
Change Notification Functions
Name Description
SYS_PORTS_ChangeNotificationDisable Disables the change notification for the selected port.
SYS_PORTS_ChangeNotificationEnable Enables the change notification for the selected port.
SYS_PORTS_ChangeNotificationGlobalDisable Globally disables the change notification for the selected port.
SYS_PORTS_ChangeNotificationGlobalEnable Globally enables the change notification for the selected port.
SYS_PORTS_ChangeNotificationInIdleModeDisable Disables the change notification for the selected port in Sleep
or Idle mode.
SYS_PORTS_ChangeNotificationInIdleModeEnable Enables the change notification for the selected port in Sleep
or Idle mode.
SYS_PORTS_ChangeNotificationPullDownDisable Disables pull-down on input change.
SYS_PORTS_ChangeNotificationPullDownEnable Enables pull-down on input change.
SYS_PORTS_ChangeNotificationPullUpDisable Disables pull-up on input change.
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SYS_PORTS_ChangeNotificationPullUpEnable Enables a weak pull-up on the change notification pin.
SYS_PORTS_ChangeNotificationStatus Gets the status of the corresponding notification pin.
Peripheral Pin Select Functions
Name Description
SYS_PORTS_IOLockDisable Disables the I/O lock.
SYS_PORTS_IOLockEnable Enables the I/O lock.
SYS_PORTS_IOLockIsActive Returns the status of I/O lock.
SYS_PORTS_RemapInput Input/Output (I/O) function remapping.
SYS_PORTS_RemapOutput Input/Output (I/O) function remapping.
Pin Control Functions
Name Description
SYS_PORTS_PinModeSelect Enables the selected pin as analog or digital.
SYS_PORTS_PinOpenDrainDisable Disables the open-drain functionality for the selected pin.
SYS_PORTS_PinOpenDrainEnable Enables the open-drain functionality for the selected pin.
SYS_PORTS_PinPullUpDisable Disables the pull-up functionality for the selected pin
SYS_PORTS_PinPullUpEnable Enables the pull-up functionality for the selected pin.
SYS_PORTS_PinRead Reads the selected digital pin.
SYS_PORTS_PinSet Sets the selected digital pin/latch.
SYS_PORTS_PinToggle Toggles the selected digital pin.
SYS_PORTS_PinWrite Writes the selected digital pin.
SYS_PORTS_PinClear Clears the selected digital pin.
SYS_PORTS_PinDirectionSelect Enables the direction for the selected pin.
Ports Control Functions
Name Description
SYS_PORTS_Clear Clears the selected digital port.
SYS_PORTS_DirectionGet Reads the direction for the selected port.
SYS_PORTS_DirectionSelect Enables the direction for the selected port.
SYS_PORTS_OpenDrainDisable Disables the open-drain functionality for the selected port.
SYS_PORTS_OpenDrainEnable Enables the open-drain functionality for the selected port.
SYS_PORTS_PullUpDisable Disables the pull-up for the selected port.
SYS_PORTS_PullUpEnable Enables the pull-up for the selected port.
SYS_PORTS_Read Reads the data from the I/O port.
SYS_PORTS_Set Writes the selected digital port/latch based on the mask.
SYS_PORTS_Toggle Toggles the selected digital port pins.
SYS_PORTS_Write Writes the data to the I/O port.
Description
5.7.7.7.1 Pin Control Functions
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5.7.7.7.1.1 SYS_PORTS_PinModeSelect Function
C
void SYS_PORTS_PinModeSelect(
PORTS_MODULE_ID index,
PORTS_ANALOG_PIN pin,
PORTS_PIN_MODE mode
);
Description
This function enables the selected pin as analog or digital.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pin Possible values of PORTS_ANALOG_PIN
mode Possible values of PORTS_PIN_MODE
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PIN -
PORTS_ANALOG_PIN_AN0 // MY_PIN_MODE - PORTS_PIN_MODE_ANALOG
SYS_PORTS_PinModSYS_PORTS_PinModeSelecteSelect( MY_PORTS_INSTANCE, MY_PIN, MY_PIN_MODE );
5.7.7.7.1.2 SYS_PORTS_PinOpenDrainDisable Function
C
void SYS_PORTS_PinOpenDrainDisable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function disables the open-drain functionality for the selected pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
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Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_PIN_10 SYS_PORTS_PinOpenDrainDisable(MY_PORTS_INSTANCE, MY_PINNUM);
5.7.7.7.1.3 SYS_PORTS_PinOpenDrainEnable Function
C
void SYS_PORTS_PinOpenDrainEnable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function enables the open-drain functionality for the selected pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_PIN_10 SYS_PORTS_PinOpenDrainEnable( MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM );
5.7.7.7.1.4 SYS_PORTS_PinPullUpDisable Function
C
void SYS_PORTS_PinPullUpDisable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function disables the pull-up functionality for the selected pin.
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Preconditions
None
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability. On some devices, pull-up
disable leads to pull-down enable.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_PIN_10 SYS_PORTS_PinPullUpDisable( MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM );
5.7.7.7.1.5 SYS_PORTS_PinPullUpEnable Function
C
void SYS_PORTS_PinPullUpEnable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This functin enables the pull-up functionality for the selected pin.
Preconditions
None
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_PIN_10 SYS_PORTS_PinPullUpEnable( MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM );
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5.7.7.7.1.6 SYS_PORTS_PinRead Function
C
bool SYS_PORTS_PinRead(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function reads the selected digital pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
The status of the port pin.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_PIN_10 bool bitStatus = SYS_PORTS_PinRead(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
5.7.7.7.1.7 SYS_PORTS_PinSet Function
C
void SYS_PORTS_PinSet(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function sets the selected digital pin/latch.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
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Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_PINNUM - PORTS_PIN_10
SYS_PORTS_PinSet(MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM);
5.7.7.7.1.8 SYS_PORTS_PinToggle Function
C
void SYS_PORTS_PinToggle(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function toggles the selected digital pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_PIN_10 SYS_PORTS_PinToggle( MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM );
5.7.7.7.1.9 SYS_PORTS_PinWrite Function
C
void SYS_PORTS_PinWrite(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos,
bool value
);
Description
This function writes the selected digital pin.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
5.7.7.7.1.10 SYS_PORTS_PinClear Function
C
void SYS_PORTS_PinClear(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This function clears the selected digital pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_IO_PIN_10 SYS_PORTS_PinClear( MY_PORTS_INSTANCE, MY_CHANNEL, MY_PINNUM );
5.7.7.7.1.11 SYS_PORTS_PinDirectionSelect Function
C
void SYS_PORTS_PinDirectionSelect(
PORTS_MODULE_ID index,
SYS_PORTS_PIN_DIRECTION pinDir,
PORTS_CHANNEL channel,
PORTS_BIT_POS bitPos
);
Description
This functino enables the direction for the selected pin.
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Preconditions
None
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinDir Pin direction
channel Identifier for the PORT channel: A, B, C, etc.
bitPos Possible values of PORTS_BIT_POS
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_PIN_10 SYS_PORTS_PIN_DIRECTION pinDir; pinDir = SYS_PORTS_DIRECTION_INPUT;
SYS_PORTS_PinDirectionSelect(MY_PORTS_INSTANCE, pinDir, MY_CHANNEL, MY_PINNUM);
5.7.7.7.2 Ports Control Functions
5.7.7.7.2.1 SYS_PORTS_Clear Function
C
void SYS_PORTS_Clear(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK clearMask
);
Description
This function clears the selected digital port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
clearMask Identifies the bits to be cleared
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
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Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. PORTS_DATA_MASK
clearMask = (PORTS_DATA_MASK)0x00FF; SYS_PORTS_Clear( MY_PORTS_INSTANCE, MY_CHANNEL, clearMask );
5.7.7.7.2.2 SYS_PORTS_DirectionGet Function
C
PORTS_DATA_MASK SYS_PORTS_DirectionGet(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel
);
Description
This function reads the direction for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
Returns
Direction of the port.
Remarks
None.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. PORTS_DATA_MASK
value; value = SYS_PORTS_DirectionGet( MY_PORTS_INSTANCE, MY_CHANNEL );
5.7.7.7.2.3 SYS_PORTS_DirectionSelect Function
C
void SYS_PORTS_DirectionSelect(
PORTS_MODULE_ID index,
SYS_PORTS_PIN_DIRECTION pinDir,
PORTS_CHANNEL channel,
PORTS_DATA_MASK mask
);
Description
This function enables the direction for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinDir Pin direction
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channel Identifier for the PORT channel: A, B, C, etc.
mask Mask for the direction of width PORTS_DATA_MASK
Returns
None
Remarks
None.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
SYS_PORTS_PIN_DIRECTION pinDir; pinDir = SYS_PORTS_DIRECTION_INPUT; PORTS_DATA_MASK myMask =
(PORTS_DATA_MASK)0x00FF; SYS_PORTS_DirectionSelect(MY_PORTS_INSTANCE, pinDir, MY_CHANNEL, myMask );
5.7.7.7.2.4 SYS_PORTS_OpenDrainDisable Function
C
void SYS_PORTS_OpenDrainDisable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK mask
);
Description
This function disables the open-drain functionality for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
mask Mask of type PORTS_DATA_MASK
Returns
None
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
SYS_PORTS_PeripheralOpenDrainDisable( MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF );
5.7.7.7.2.5 SYS_PORTS_OpenDrainEnable Function
C
void SYS_PORTS_OpenDrainEnable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK mask
);
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Description
This function enables the open-drain functionality for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
mask Mask of type PORTS_DATA_MASK
Returns
None
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
SYS_PORTS_OpenDrainEnable( MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF );
5.7.7.7.2.6 SYS_PORTS_PullUpDisable Function
C
void SYS_PORTS_PullUpDisable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK mask
);
Description
This function disables the pull-up for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
mask Mask of type PORTS_DATA_MASK
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability. On some devices, pull-up
disable leads to pull-down enable.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
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SYS_PORTS_PullUpDisable( MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF );
5.7.7.7.2.7 SYS_PORTS_PullUpEnable Function
C
void SYS_PORTS_PullUpEnable(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK mask
);
Description
This function enables the pull-up for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
mask Mask of type PORTS_DATA_MASK
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
SYS_PORTS_PullUpEnable( MY_PORTS_INSTANCE, MY_CHANNEL, (PORTS_DATA_MASK)0x00FF );
5.7.7.7.2.8 SYS_PORTS_Read Function
C
PORTS_DATA_TYPE SYS_PORTS_Read(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel
);
Description
This function reads the data from the I/O port.
Preconditions
The direction of the port to be set as input.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
Returns
Return the data read from the port.
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Remarks
None.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. PORTS_DATA_TYPE
readData; readData = SYS_PORTS_Read( MY_PORTS_INSTANCE, MY_CHANNEL );
5.7.7.7.2.9 SYS_PORTS_Set Function
C
void SYS_PORTS_Set(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_TYPE value,
PORTS_DATA_MASK mask
);
Description
This function writes to the selected digital port/latch relative to the mask.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
value Value to be written into a port of width PORTS_DATA_TYPE
mask Identifies the bits to be written
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// MY_VALUE - 0x1234
PORTS_DATA_MASK myMask = (PORTS_DATA_MASK)0x00FF;
SYS_PORTS_Set(MY_PORTS_INSTANCE, MY_CHANNEL, MY_VALUE, myMask);
5.7.7.7.2.10 SYS_PORTS_Toggle Function
C
void SYS_PORTS_Toggle(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_MASK toggleMask
);
Description
This function toggles the selected digital port pins.
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Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
toggleMask Identifies the bits to be toggled
Returns
None
Remarks
None.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. PORTS_DATA_MASK
toggleMask = (PORTS_DATA_MASK)0x00FF; SYS_PORTS_Toggle( MY_PORTS_INSTANCE, MY_CHANNEL, toggleMask );
5.7.7.7.2.11 SYS_PORTS_Write Function
C
void SYS_PORTS_Write(
PORTS_MODULE_ID index,
PORTS_CHANNEL channel,
PORTS_DATA_TYPE value
);
Description
This function writes the data to the I/O port.
Preconditions
The direction of the port to be set as output.
Parameters
Parameters Description
index Identifier for the device instance to be configured
channel Identifier for the PORT channel: A, B, C, etc.
value Value to be written into a port of width PORTS_DATA_TYPE
Returns
None.
Remarks
None.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. PORTS_DATA_TYPE
writeData; SYS_PORTS_Write( MY_PORTS_INSTANCE, MY_CHANNEL, MY_VALUE );
5.7.7.7.3 Change Notification Functions
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5.7.7.7.3.1 SYS_PORTS_ChangeNotificationDisable Function
C
void SYS_PORTS_ChangeNotificationDisable(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum
);
Description
This function disables the change notification for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
PORTS_CHANGE_NOTICE_PIN pinNum; SYS_PORTS_ChangeNotificationDisable( index, pinNum );
5.7.7.7.3.2 SYS_PORTS_ChangeNotificationEnable Function
C
void SYS_PORTS_ChangeNotificationEnable(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum,
SYS_PORTS_PULLUP_PULLDOWN_STATUS value
);
Description
This function enables the change notification for the selected port.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
value Pull-up enable or disable value
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
Returns
None
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Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
SYS_PORTS_PULLUP_PULLDOWN_STATUS value; PORTS_CHANGE_NOTICE_PIN pinNum;
SYS_PORTS_ChangeNotificationEnable( index, pinNum, value );
5.7.7.7.3.3 SYS_PORTS_ChangeNotificationGlobalDisable Function
C
void SYS_PORTS_ChangeNotificationGlobalDisable(
PORTS_MODULE_ID index
);
Description
This function globally disables the change notification for the selected port.
Preconditions
None.
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
SYS_PORTS_ChangeNotificationGlobalDisable( MY_PORTS_INSTANCE);
5.7.7.7.3.4 SYS_PORTS_ChangeNotificationGlobalEnable Function
C
void SYS_PORTS_ChangeNotificationGlobalEnable(
PORTS_MODULE_ID index
);
Description
This function globally enables the change notification for the selected port.
Preconditions
None.
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
SYS_PORTS_ChangeNotificationGlobalEnable( MY_PORTS_INSTANCE );
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5.7.7.7.3.5 SYS_PORTS_ChangeNotificationInIdleModeDisable Function
C
void SYS_PORTS_ChangeNotificationInIdleModeDisable(
PORTS_MODULE_ID index
);
Description
This function disables the change notification for the selected port in Sleep or Idle mode.
Preconditions
None.
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
SYS_PORTS_ChangeNotificationInIdleModeDisable( MY_PORTS_INSTANCE );
5.7.7.7.3.6 SYS_PORTS_ChangeNotificationInIdleModeEnable Function
C
void SYS_PORTS_ChangeNotificationInIdleModeEnable(
PORTS_MODULE_ID index
);
Description
This function enables the change notification for the selected port in Sleep or Idle mode.
Preconditions
None.
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer.
SYS_PORTS_ChangeNotificationInIdleModeEnable( MY_PORTS_INSTANCE );
5.7.7.7.3.7 SYS_PORTS_ChangeNotificationPullDownDisable Function
C
void SYS_PORTS_ChangeNotificationPullDownDisable(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum
);
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Description
This function disables pull-down on input change.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_CHANGE_NOTICE_PIN_10 SYS_PORTS_ChangeNotificationPullDownDisable( MY_PORTS_INSTANCE,
MY_PINNUM );
5.7.7.7.3.8 SYS_PORTS_ChangeNotificationPullDownEnable Function
C
void SYS_PORTS_ChangeNotificationPullDownEnable(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum
);
Description
This function enables pull-down on input change.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_CHANGE_NOTICE_PIN_10 SYS_PORTS_ChangeNotificationPullDownEnable( MY_PORTS_INSTANCE,
MY_PINNUM );
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5.7.7.7.3.9 SYS_PORTS_ChangeNotificationPullUpDisable Function
C
void SYS_PORTS_ChangeNotificationPullUpDisable(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum
);
Description
This function disables pull-up on input change.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_CHANGE_NOTICE_PIN_10 SYS_PORTS_ChangeNotificationPullUpDisable( MY_PORTS_INSTANCE, MY_PINNUM );
5.7.7.7.3.10 SYS_PORTS_ChangeNotificationPullUpEnable Function
C
void SYS_PORTS_ChangeNotificationPullUpEnable(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum
);
Description
This function enables a weak pull-up on the change notification pin.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
Returns
None.
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
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Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. // MY_PINNUM -
PORTS_CHANGE_NOTICE_PIN_10 SYS_PORTS_ChangeNotificationPullUpEnable( MY_PORTS_INSTANCE, MY_PINNUM );
5.7.7.7.3.11 SYS_PORTS_ChangeNotificationStatus Function
C
bool SYS_PORTS_ChangeNotificationStatus(
PORTS_MODULE_ID index,
PORTS_CHANGE_NOTICE_PIN pinNum
);
Description
This function gets the status of the corresponding notification pin..
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
pinNum Possible values of PORTS_CHANGE_NOTICE_PIN
Returns
• true - Change notice has occurred
• false - Change notice has not occurred
Remarks
Not all features are available on all devices. Refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the // application developer. //pinNUM is the change
notification pin bool status; status = SYS_PORTS_ChangeNotificationStatus( MY_PORTS_INSTANCE, MY_PINNUM );
5.7.7.7.4 Peripheral Pin Select Functions
5.7.7.7.4.1 SYS_PORTS_IOLockDisable Function
C
void SYS_PORTS_IOLockDisable(
PORTS_MODULE_ID index
);
Description
This function disables the I/O lock.
Preconditions
index - Identifier for the device instance to be configured
Returns
None.
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Remarks
This feature is available for devices with PPS functionality. If the associated Configuration bit is set and if the I/O lock is enabled,
this feature can never be used to disable the I/O lock. The only way to clear the bit and re-enable peripheral remapping is to
perform a device Reset.
This function is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
SYS_PORTS_IOLockDisable(MY_PORTS_INSTANCE);
5.7.7.7.4.2 SYS_PORTS_IOLockEnable Function
C
void SYS_PORTS_IOLockEnable(
PORTS_MODULE_ID index
);
Description
This function enables the I/O lock.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature is available for devices with Peripheral Pin Select (PPS) functionality. If the associated Configuration bit is set, this
function can only be set once.
This function is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
SYS_PORTS_IOLockEnable(MY_PORTS_INSTANCE);
5.7.7.7.4.3 SYS_PORTS_IOLockIsActive Function
C
bool SYS_PORTS_IOLockIsActive(
PORTS_MODULE_ID index
);
Description
This function returns the status of I/O lock.
Preconditions
None.
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Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
• true - I/O lock is active
• false - I/O lock is not active
Remarks
This feature is available for devices with PPS functionality.
This function is not available on all devices. Please refer to the specific device data sheet for availability.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
bool lockStatus;
lockStatus = SYS_PORTS_IOLockIsActive(MY_PORTS_INSTANCE);
5.7.7.7.4.4 SYS_PORTS_RemapInput Function
C
void SYS_PORTS_RemapInput(
PORTS_MODULE_ID index,
PORTS_REMAP_INPUT_FUNCTION function,
PORTS_REMAP_INPUT_PIN remapPin
);
Description
This function controls the I/O function remapping.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
SYS_PORTS_ExistsRemapInputOutput in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// Remapping input function 'Input Capture 1' to the Remappable pin 'RPD2'
SYS_PORTS_RemapInput(MY_PORTS_INSTANCE, INPUT_FUNC_IC1, INPUT_PIN_RPD2 );
5.7.7.7.4.5 SYS_PORTS_RemapOutput Function
C
void SYS_PORTS_RemapOutput(
PORTS_MODULE_ID index,
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PORTS_REMAP_OUTPUT_FUNCTION function,
PORTS_REMAP_OUTPUT_PIN remapPin
);
Description
This function controls the I/O function remapping.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the device instance to be configured
Returns
None.
Remarks
This feature may not be available on all devices. Please refer to the specific device data sheet to determine availability or use
SYS_PORTS_ExistsRemapInputOutput in your application to determine whether this feature is available.
Example
// Where MY_PORTS_INSTANCE, is the ports instance selected for use by the
// application developer.
// Remapping output function 'UART3 Transmit' to the Remappable pin 'RPA14'
SYS_PORTS_RemapInputOutput(MY_PORTS_INSTANCE, OTPUT_FUNC_U3TX, OUTPUT_PIN_RPA14);
5.7.7.7.5 Data Types and Constants
5.7.7.7.5.1 SYS_PORTS_PIN_DIRECTION Enumeration
C
typedef enum {
SYS_PORTS_DIRECTION_OUTPUT,
SYS_PORTS_DIRECTION_INPUT
} SYS_PORTS_PIN_DIRECTION;
Description
SYS PORTS PIN DIRECTION
These constants provide the port pin direction definitions.
Members
Members Description
SYS_PORTS_DIRECTION_OUTPUT Direction as output
SYS_PORTS_DIRECTION_INPUT Direction as input
Remarks
None.
5.7.7.7.5.2 SYS_PORTS_PULLUP_PULLDOWN_STATUS Enumeration
C
typedef enum {
SYS_PORTS_PULLUP_DISABLE,
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SYS_PORTS_PULLUP_ENABLE
} SYS_PORTS_PULLUP_PULLDOWN_STATUS;
Description
SYS PORTS PULLUP status
These constants provide the pull-up or pull-down status definitions.
Members
Members Description
SYS_PORTS_PULLUP_DISABLE PULLUP Disable
SYS_PORTS_PULLUP_ENABLE PULLUP Enable
Remarks
None.
5.7.7.8 Files
Files
Name Description
help_sys_ports.h This is file help_sys_ports.h.
sys_ports.h Ports System Service interface definitions
Description
5.7.7.8.1 help_sys_ports.h
This is file help_sys_ports.h.
Enumerations
Name Description
PORTS_ANALOG_PIN Data type defining the different Analog input pins
PORTS_CHANGE_NOTICE_PIN Data type defining the different Change Notification Pins enumeration
PORTS_CHANNEL Identifies the PORT Channels Supported.
PORTS_MODULE_ID Identifies the PORT Modules Supported.
PORTS_PERIPHERAL_OD Data type defining the different Peripherals available for Open drain
Configuration
PORTS_PIN Data type defining the different PORTS IO Pins enumeration
PORTS_REMAP_FUNCTION Data type defining the different remap function enumeration
PORTS_REMAP_PIN Data type defining the different remappable input/output enumeration
5.7.7.8.2 sys_ports.h
Ports System Service Interface Definition
This file contains the interface definition for the Ports system service. It provides a way to interact with the Ports subsystem to
manage the timing requests supported by the system
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Enumerations
Name Description
SYS_PORTS_PIN_DIRECTION Defines the direction of the port pins.
SYS_PORTS_PULLUP_PULLDOWN_STATUS Provides the pull-up and pull-down status.
Functions
Name Description
SYS_PORTS_ChangeNotificationDisable Disables the change notification for the selected port.
SYS_PORTS_ChangeNotificationEnable Enables the change notification for the selected port.
SYS_PORTS_ChangeNotificationGlobalDisable Globally disables the change notification for the selected port.
SYS_PORTS_ChangeNotificationGlobalEnable Globally enables the change notification for the selected port.
SYS_PORTS_ChangeNotificationInIdleModeDisable Disables the change notification for the selected port in Sleep
or Idle mode.
SYS_PORTS_ChangeNotificationInIdleModeEnable Enables the change notification for the selected port in Sleep
or Idle mode.
SYS_PORTS_ChangeNotificationPullDownDisable Disables pull-down on input change.
SYS_PORTS_ChangeNotificationPullDownEnable Enables pull-down on input change.
SYS_PORTS_ChangeNotificationPullUpDisable Disables pull-up on input change.
SYS_PORTS_ChangeNotificationPullUpEnable Enables a weak pull-up on the change notification pin.
SYS_PORTS_ChangeNotificationStatus Gets the status of the corresponding notification pin.
SYS_PORTS_Clear Clears the selected digital port.
SYS_PORTS_DirectionGet Reads the direction for the selected port.
SYS_PORTS_DirectionSelect Enables the direction for the selected port.
SYS_PORTS_IOLockDisable Disables the I/O lock.
SYS_PORTS_IOLockEnable Enables the I/O lock.
SYS_PORTS_IOLockIsActive Returns the status of I/O lock.
SYS_PORTS_OpenDrainDisable Disables the open-drain functionality for the selected port.
SYS_PORTS_OpenDrainEnable Enables the open-drain functionality for the selected port.
SYS_PORTS_PinClear Clears the selected digital pin.
SYS_PORTS_PinDirectionSelect Enables the direction for the selected pin.
SYS_PORTS_PinModeSelect Enables the selected pin as analog or digital.
SYS_PORTS_PinOpenDrainDisable Disables the open-drain functionality for the selected pin.
SYS_PORTS_PinOpenDrainEnable Enables the open-drain functionality for the selected pin.
SYS_PORTS_PinPullUpDisable Disables the pull-up functionality for the selected pin
SYS_PORTS_PinPullUpEnable Enables the pull-up functionality for the selected pin.
SYS_PORTS_PinRead Reads the selected digital pin.
SYS_PORTS_PinSet Sets the selected digital pin/latch.
SYS_PORTS_PinToggle Toggles the selected digital pin.
SYS_PORTS_PinWrite Writes the selected digital pin.
SYS_PORTS_PullUpDisable Disables the pull-up for the selected port.
SYS_PORTS_PullUpEnable Enables the pull-up for the selected port.
SYS_PORTS_Read Reads the data from the I/O port.
SYS_PORTS_RemapInput Input/Output (I/O) function remapping.
SYS_PORTS_RemapOutput Input/Output (I/O) function remapping.
SYS_PORTS_Set Writes the selected digital port/latch based on the mask.
SYS_PORTS_Toggle Toggles the selected digital port pins.
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SYS_PORTS_Write Writes the data to the I/O port.
File Name
sys_ports.h
Company
Microchip Technology Inc.
5.7.8 Timer System Service Library
5.7.8.1 Introduction
Timer System Service Library
for
Microchip Microcontrollers
This library provides interfaces to manage alarms and/or delays.
Overview
The Timer System Service Library is capable of providing periodic or one shot alarms, delays to the user. It works as a client for
the Timer driver and opens one of the instances of the driver to perform the activities. The periodicity or the delay is an integer
multiple of the Timer driver alarm period.
5.7.8.2 Release Notes
MPLAB Harmony Version: v0.70b Timer System Service Version : 0.01 Alpha Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
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5.7.8.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED AS IS MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.7.8.4 Using the Library
This topic describes the basic architecture of the Timer System Service Library and provides information and examples on how
to use it.
Interface Header File: sys_tmr.h
The interface to the Timer System Service library is defined in the "sys_tmr.h" header file, which is included by the "sys.h"
system service header file. Any C language source (.c) file that uses the Timer System Service library should include "sys.h".
Library File:
The Timer System Service Library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the System Service interacts with the framework.
Useful Terminologies:
Term Description
Tick Heart beats provided by the system timer. Defines the rate at which the callback gets called in a periodicity.
One tick corresponds to one alarm period.
Alarm Minimum resolution to which the Timer driver is configured, a tick or a callback is a multiple of this time.
One Shot
callback
Callback gets called only once after the time is elapsed.
Periodic
callback
Callback gets called at a periodic rate as defined by the user.
Delay Non-blocking delays
Pre-requisites: Following modules are necessary for the Timer System Service layer to function,
• Timer Peripheral library
• Timer Device driver
• Interrupt Peripheral library [If Interrupt mode is opted]
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• Interrupt System Service [If Interrupt mode is opted]
5.7.8.4.1 Abstraction Model
The Timer System Service module uses the Timer driver abstraction layer to provide the following functionalities,
• Periodic Callback
• One Shot/Single Callback
• Delays [interrupt mode alone]
Note: Periodic/One shot modes of the Timer System Service will work in both polling and interrupt driven environments.
Simple Timer System Service abstraction model.
The following flow diagram depicts Periodic Callback usage model.
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The following flow diagram depicts One Shot Callback usage model.
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The following flow diagram depicts Delay usage model.
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5.7.8.4.2 Library Overview
The library interface routines are divided into various subsections, each of the subsections addresses one of the blocks or the
overall operation of the Timer System Service Library.
Library Interface Section Description
System Level Interaction Functions Provides system module APIs. Device initialization, deinitialization,
reinitialization and status functions.
Timed Callback Functions Provides interfaces to handle timed periodic or one shot callbacks
Timed Delay Functions Provides interfaces to handle timed delays
Miscellaneous Functions Provides interfaces for timer tick counts, etc.
5.7.8.4.3 How the Library Works
The library provides interfaces to support:
• System Interaction
• Periodic Callback
• One shot/Single Callback
• Delays [In Interrupt mode Alone]
• Tick count Information
The following model gives information on interaction between various modules.
Note: The arrows in the above diagram indicates the dependencies or support.
Module interaction occurs in the following order:
1. The initialization, reinitialization, deinitialization are handled by the SYS INIT module.
2. The Timer System Service Initialization function initializes the library's internal data structures.
3. After the initialization, Timer System Service Tasks function would be called by the SYS Tasks module to open the Timer
Driver and do other configuration activities. Once the Timer driver is ready to be used the Timer System Service Tasks API
makes the system ready to be used by setting the status of the Timer System Service module to SYS_MODULE_RUNNING.
4. The application can now enable either periodic callback or one-shot callback or enable delays.
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Notes:
1. It is possible to have multiple clients access the system timer service.
2. Multiple client system calls for the configuration of multiple periodic callbacks or one shot and single periodic callback event
etc.
3. It is not possible to use one client in polling and the other in the interrupt driven mode.
4. User or the application has to make sure to initialize the interrupt system module and set priorities accordingly.
5.7.8.4.3.1 System Interaction
Initialization and Reinitialization:
The SYS module performs the initialization and the reinitialization of the Timer System Service. During initialization the following
informations are populated into the internal data structures from the init structure 'SYS_TMR_INIT' passed as a parameter:
Initialization
Member
Description
moduleInit System module initialization of the power state
drvIndex Timer driver module/instance index, the same index used to initialize the timer driver
alarmPeriod Alarm period in ms to configure the timer driver. This period will be used as the base time for further
calculations of periodic or single callbacks etc.
The SYS_TMR_Initialize API returns a dummy handle of the type SYS_MODULE_OBJ. There on, the object handle returned by
the Initialize interface would be used by the other system interfaces like SYS_TMR_Reinitialize, SYS_TMR_Deinitialize,
SYS_TMR_Status and SYS_TMR_Tasks.
Note: Already initialized SYS TMR module if tried to initialize again, will safely return without modifying the behavior of the
system.
Example for Timer System Service initialization:
SYS_MODULE_OBJ objectHandle;
SYS_TMR_INIT initConfig;
// Populate the SYS TMR initialization structure
initConfig.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
initConfig.drvIndex = DRV_TMR_INDEX_0;
initConfig.alarmPeriod = 100;
objectHandle = SYS_TMR_Initialize( SYS_TMR_INDEX_0, ( SYS_MODULE_INIT * )&initConfig );
if( SYS_MODULE_OBJ_INVALID == objectHandle )
{
// Handle error
}
Sample initialization sequence in polling environment:
void SYS_Initialize( SYS_INIT_DATA *data )
{
/* Application Initialization */
App_Init();
/* Initialize the Timer driver */
drvTmrObject = DRV_TMR_Initialize( DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&tmrInitData );
/* Initialize the SYS TMR Module */
sysTmrObject = SYS_TMR_Initialize( DRV_TMR_INDEX_0, (SYS_MODULE_INIT *)&sysTmrInitData );
}
Sample initialization sequence in an interrupt driven environment:'
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void SYS_Initialize( SYS_INIT_DATA *data )
{
/* Application Initialization */
App_Init();
/* Initialize the Timer driver */
drvTmrObject = DRV_TMR_Initialize( DRV_TMR_INDEX_0, ( SYS_MODULE_INIT * )&tmrInitData );
/* Initialize the SYS TMR Module */
sysTmrObject = SYS_TMR_Initialize( DRV_TMR_INDEX_0, ( SYS_MODULE_INIT * )&sysTmrInitData );
/* Set the Timer Interrupt priority, sub-priority if supported by the device */
SYS_INT_PrioritySet( INT_SOURCE_TIMER_1, INT_PRIORITY_LEVEL1 );
SYS_INT_SubprioritySet( INT_SOURCE_TIMER_1, INT_SUBPRIORITY_LEVEL1 );
/* Initialize the interrupt sub system module */
SYS_INT_Initialize();
}
Deinitialization:
The deinitialize operation (SYS_TMR_Deinitialize) places the module in inactive state. Once the initialize operation has been
called, the deinitialize operation must be called before the initialize is called again. If the operation requires time to allow the
hardware to complete, this will be reported by the SYS_TMR_Status operation.
Status:
Status of the system timer module can be checked using SYS_TMR_Status interface. After the initialization, reinitialization or the
deinitialization activities the System timer Service status can be retrieved and checked for further actions.
Tasks Routine:
The system will call SYS_TMR_Tasks from System Task Service no matter whether we are in a polled or an interrupt driven
environment. This interface gets the system timer module into running mode. This interface needs to be called after the timer
driver is successfully initialized.
Sample call order in case of a polling environment:
void SYS_Tasks( void )
{
/* Call Driver TMR Tasks API */
DRV_TMR_Tasks( drvTmrObject );
/* Call SYS TMR Tasks API */
SYS_TMR_Tasks( sysTmrObject );
/* Call the Application Tasks */
App_Tasks();
}
Sample call order in case of an interrupt driven environment:
void SYS_Tasks( void )
{
/* Call SYS TMR Tasks */
SYS_TMR_Tasks( sysTmrObject );
/* Call the Application Tasks */
App_Tasks();
}
void InterruptServiceRoutine( void )
{
/* Call the timer driver's "Tasks" routine */
DRV_TMR_Tasks( drvTmrObject );
}
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5.7.8.4.3.2 Periodic Callback
This section deals with the periodic callback registration and its usage.
The following diagram depicts the interaction across various modules for the periodic callback feature,
Steps involved in registering & using the feature:
1. Set the Timer System Service in the running mode (SYS_MODULE_RUNNING). See description to set to running mode. Use
the SYS_TMR_STATUS function to verify that the service is in this mode.
2. Register the periodic callback feature using the SYS_TMR_CallbackPeriodic with the period and the pointer to the callback
routine. The period parameter should be integral multiple of the Timer driver alarm period. The interface
'SYS_TMR_CallbackPeriodic' returns a valid handle after successful registration.
Note: The handle can be later used by the user to stop the periodic callback temporarily by the user using the interface
'SYS_TMR_CallbackStop'. Based on the periodicity set by the user the respective callback would be triggered repetitively after it
elapses.
Example use case of this feature is described below,
void SYS_Initialize ( SYS_INIT_DATA *data )
{
/* Initialize the Timer driver */
drvTmrObject = DRV_TMR_Initialize ( SYS_INDEX, (SYS_MODULE_INIT *)&tmrInitData );
/* Initialize the SYS TMR Module */
sysTmrObject = SYS_TMR_Initialize ( SYS_INDEX, (SYS_MODULE_INIT *)&sysTmrInitData );
/* Application Initialization */
App_Initialize ();
}
void SYS_Tasks(void)
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{
/* Call Driver TMR Tasks API */
DRV_TMR_Tasks ( drvTmrObject );
/* Call SYS TMR Tasks API */
SYS_TMR_Tasks ( sysTmrObject );
/* Call the App Tasks */
App_Tasks ();
}
void App_Tasks ( void )
{
switch (testState)
{
/* Wait in Init state till the SYS TMR Module is in running mode */
case TEST_STATE_Init:
if (SYS_MODULE_RUNNING == SYS_TMR_Status(sysTmrObject))
{
/* SYS TMR is in running mode */
testState = TEST_STATE_Config_Periodic;
}
else
{
testState = TEST_STATE_Init;
}
break;
case TEST_STATE_Config_Periodic:
/* Activate periodic callback */
handle = SYS_TMR_CallbackPeriodic (120, &Test_Callback);
testState = TEST_STATE_Count_Read;
break;
case TEST_STATE_Count_Read:
testCount1 = SYS_TMR_TickCountGet ();
break;
}
}
// Callback which will be called repetitively after the configured
// time elapses
void Test_Callback ( void )
{
PORTA = ~PORTA;
}
Note: The configuration 'SYS_TMR_INTERRUPT_MODE' has no impact on this feature.
Single Periodic Event Feature: The configuration macro/switch 'SYS_TMR_SINGLE_PERIODIC_EVENT', if set true will
enables single periodic event feature. After the user creates one periodic callback event, no other periodic callback events are
allowed. In the sense, multiple periodic events cannot be registered.
Multiple Periodic Event Feature: The configuration macro/switch 'SYS_TMR_SINGLE_PERIODIC_EVENT', if set false will
enable multiple periodic event feature.
5.7.8.4.3.3 One Shot Callback
This section deals with the one-shot/single callback registration and its usage.
The following diagram depicts the interaction across various modules for the one-shot callback feature,
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Steps involved in registering and using the feature:
1. Initial requirement is to have the Timer System Service module in the mode 'SYS_MODULE_RUNNING'. The user can call
the function SYS_TMR_Status to get the current status information of the module.
2. One-shot/Single callback feature can be registered by calling the function 'SYS_TMR_CallbackSingle' with the parameters
periodicity of the callback & a pointer to the user's callback routine. The period parameter has to be integral multiple of the
TMR driver alarm period.
Based on the periodicity set by the user the respective callback would be triggered once after it elapses.
Note: The handle can be later used by the user to stop the one shot callback temporarily by the user using the interface
'SYS_TMR_CallbackStop'.
Example use case of this feature is described below,
void SYS_Initialize ( SYS_INIT_DATA *data )
{
/* Initialize the Timer driver */
drvTmrObject = DRV_TMR_Initialize ( SYS_INDEX, (SYS_MODULE_INIT *)&tmrInitData );
/* Initialize the SYS TMR Module */
sysTmrObject = SYS_TMR_Initialize ( SYS_INDEX, (SYS_MODULE_INIT *)&sysTmrInitData );
/* Application Initialization */
App_Initialize ();
}
void SYS_Tasks(void)
{
/* Call Driver TMR Tasks API */
DRV_TMR_Tasks ( drvTmrObject );
/* Call SYS TMR Tasks API */
SYS_TMR_Tasks ( sysTmrObject );
/* Call the App Tasks */
App_Tasks ();
}
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void App_Tasks ( void )
{
switch (testState)
{
/* Wait in Init state till the SYS TMR Module is in running mode */
case TEST_STATE_Init:
if (SYS_MODULE_RUNNING == SYS_TMR_Status(sysTmrObject))
{
/* SYS TMR is in running mode */
testState = TEST_STATE_Config_Single;
}
else
{
testState = TEST_STATE_Init;
}
break;
case TEST_STATE_Config_Single:
/* Activate one shot/single callback */
handle = SYS_TMR_CallbackSingle (120, &Test_Callback);
testState = TEST_STATE_Count_Read;
break;
case TEST_STATE_Count_Read:
testCount1 = SYS_TMR_TickCountGet ();
break;
}
}
// Callback which will be called repetitively after the configured
// time elapses
void Test_Callback ( void )
{
PORTA = ~PORTA;
}
Note: The configuration 'SYS_TMR_INTERRUPT_MODE' has no impact on this feature.
5.7.8.4.3.4 Delays
This section deals with the delay registration and its usage. The mechanism depicted supports only non-blocking delays.
The following diagram depicts the interaction across various modules for the delay feature,
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Steps involved in registering and using the feature:
1. Initial requirement is to have the Timer System Service module in the mode 'SYS_MODULE_RUNNING'. The user can call
the function SYS_TMR_Status to get the current status information of the module.
2. Delay feature can be registered by calling the function 'SYS_TMR_DelayMS' with the delay parameter. The delay parameter
has to be integral multiple of the Timer driver alarm period.
Note: The API 'SYS_TMR_DelayMS' returns a valid handle after successful registration. This handle can be later used by the
user to check the status of the delay using the API 'SYS_TMR_DelayStatusGet'.
The following code fragment gives a typical use case for this feature,
case DELAY_START_STATE:
handle = SYS_TMR_DelayMS (500);
state = DELAY_CHECKSTATE;
break;
case DELAY_CHECKSTATE:
if (SYS_TMR_DELAY_EXPIRED == SYS_TMR_DelayStatusGet(handle))
{
state = DELAY_START_STATE;
}
else
{
state = DELAY_CHECKSTATE;
}
break;
Note: For the usage of the Delay feature, the configuration switch 'SYS_TMR_INTERRUPT_MODE' needs to be set to 'true'.
5.7.8.4.3.5 Miscellaneous
Tick Counts Information: The API 'SYS_TMR_TickCountGet' provides the current tick information.
Alarm Period: The previously configured alarm period can be obtained using the interface 'SYS_TMR_AlarmPeriodGet'. Period
chosen for the periodic/one shot callback should be a multiple of the driver's alarm period Say if the alarm period is 10ms, then
the period should be a multiple of 10.
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5.7.8.4.3.6 Examples
Sample application tasks:
Periodic callback with only one period with 120 ms period:
switch (state)
{
case STATE_Init:
if (SYS_MODULE_RUNNING == SYS_TMR_Status(sysTmrObject))
{
state = STATE_Config_Periodic;
}
else
{
state = STATE_Init;
}
break;
case STATE_Config_Periodic:
handle = SYS_TMR_CallbackPeriodic (120, &Test_Callback);
state = STATE_Count_Read;
break;
case STATE_Count_Read:
testCount = SYS_TMR_TickCountGet ();
state = STATE_Count_Read;
break;
}
Periodic callback with multiple periods 120 ms and 250 ms:
switch (state)
{
case STATE_Init:
if (SYS_MODULE_RUNNING == SYS_TMR_Status(sysTmrObject))
{
state = STATE_Config_Periodic;
}
else
{
state = STATE_Init;
}
break;
case STATE_Config_Periodic:
handle1 = SYS_TMR_CallbackPeriodic (120, &Test_Callback1);
handle2 = SYS_TMR_CallbackPeriodic (250, &Test_Callback2);
state = STATE_Count_Read;
break;
case STATE_Count_Read:
testCount = SYS_TMR_TickCountGet ();
state = STATE_Count_Read;
break;
}
void Test_Callback1 ( void )
{
/* Assume RA0 is connected to one LED */
PORTAbits.RA0 = ~PORTAbits.RA0;
}
void Test_Callback2 ( void )
{
/* Assume RA1 is connected to another LED */
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PORTAbits.RA1 = ~PORTAbits.RA1;
}
One-Shot Callback:
switch (state)
{
case STATE_Init:
if (SYS_MODULE_RUNNING == SYS_TMR_Status(sysTmrObject))
{
state = STATE_Config_Single;
}
else
{
state = STATE_Init;
}
break;
case STATE_Config_Single:
SYS_TMR_CallbackSingle (500, &Test_Callback);
state = STATE_Count_Read;
break;
case STATE_Count_Read:
testCount = SYS_TMR_TickCountGet ();
state = STATE_Count_Read;
break;
}
Delay:
switch (state)
{
case STATE_Init:
if (SYS_MODULE_RUNNING == SYS_TMR_Status(sysTmrObject))
{
state = STATE_DelayStart;
}
else
{
state = STATE_Init;
}
break;
case STATE_DelayStart:
dlHandle = SYS_TMR_DelayMS (500);
state = STATE_DelayCheck;
break;
case STATE_DelayCheck:
if (SYS_TMR_DELAY_EXPIRED == SYS_TMR_DelayStatusGet(dlHandle))
{
state = STATE_DelayStart;
}
else
{
state = STATE_DelayCheck;
}
break;
}
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5.7.8.5 Configuring the Library
Macros
Name Description
SYS_TMR_ERROR_TOLERANCE Sets the error tolerance in milliseconds.
SYS_TMR_INTERRUPT_MODE Activates the Interrupt mode.
SYS_TMR_SINGLE_PERIODIC_EVENT Sets the type of the periodic event.
SYS_TMR_MAX_PERIODIC_EVENTS Sets the maximum periodic multi-event callbacks supported.
Description
The configuration of the Timer System Service is based on the file sys_config.h.
This header file contains the configuration selection for the Timer System Service build. Based on the selections made, the
Timer System Service will support or not support selected features.These configuration settings will apply to all instances of the
Timer System Service.
This header can be placed anywhere, the path of this header needs to be present in the include search path for a successful
build. Refer to the Applications Overview section for more details.
5.7.8.5.1 SYS_TMR_ERROR_TOLERANCE Macro
C
#define SYS_TMR_ERROR_TOLERANCE 0
Description
Error Tolerance configuration
This macro sets the error tolerance in milliseconds with reference to the configured alarm period of the timer driver.
Remarks
None.
5.7.8.5.2 SYS_TMR_INTERRUPT_MODE Macro
C
#define SYS_TMR_INTERRUPT_MODE false
Description
Interrupt Mode configuration
This macro sets up the interrupt mode, which can accept the following values:
• true - Interrupt mode
• false - No Interrupt mode
Remarks
The delay feature works only if the Interrupt mode is set to 'true' and the respective Timer has been configured for Interrupt
mode. This feature has been designed to provide a non-blocking delay.
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5.7.8.5.3 SYS_TMR_SINGLE_PERIODIC_EVENT Macro
C
#define SYS_TMR_SINGLE_PERIODIC_EVENT true
Description
Periodic event type configuration
This macro sets the type of the periodic event, which can accept the following values:
• true - Single periodic event
• false - Multiple periodic events
Remarks
If multiple periodic events are enabled, the switch SYS_TMR_MAX_PERIODIC_EVENTS has to be configured to support the
maximum permitted events.
5.7.8.5.4 SYS_TMR_MAX_PERIODIC_EVENTS Macro
C
#define SYS_TMR_MAX_PERIODIC_EVENTS 5
Description
Maximum periodic events configuration
This macro sets the maximum periodic multi-event callbacks.
Remarks
This requires multiple periodic events enabled through the switch SYS_TMR_SINGLE_PERIODIC_EVENT.
5.7.8.6 Building the Library
5.7.8.7 Library Interface
Data Types and Constants
Name Description
SYS_TMR_CALLBACK Defines a pointer to a callback function.
SYS_TMR_DELAY_STATUS Defines the callback service type.
SYS_TMR_HANDLE Identifies a particular registered event instance.
SYS_TMR_INIT Identifies the system timer initialize structure.
SYS_TMR_HANDLE_INVALID Identifies the invalid handle of the system timer.
SYS_TMR_INDEX_0 Timer System Service index definitions.
SYS_TMR_RUNNING Identifies the current status/state of the system timer.
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Miscellaneous Functions
Name Description
SYS_TMR_AlarmPeriodGet Returns the previously configured alarm period.
SYS_TMR_TickCountGet Provides the current counter value.
System Level Interaction Functions
Name Description
SYS_TMR_Deinitialize Deinitializes the specific module instance of the TMR module
SYS_TMR_Initialize Initializes hardware and data for the instance of the Timer module and opens the
specific module instance.
SYS_TMR_Reinitialize Reinitializes and refreshes the hardware for the instance of the Timer module.
SYS_TMR_Status Returns status of the specific instance of the Timer module.
SYS_TMR_Tasks Maintains the system timer's state machine and implements its ISR.
Timed Callback Functions
Name Description
SYS_TMR_CallbackPeriodic The Periodic callback is registered and started using this function.
SYS_TMR_CallbackSingle The one-shot/single callback is registered and started using this function.
SYS_TMR_CallbackStop Stops the periodic callback service.
Timed Delay Functions
Name Description
SYS_TMR_DelayMS Registers an event for the specified delay.
SYS_TMR_DelayStatusGet Intimates if the previously configured delay has elapsed.
Description
This section describes the APIs of the Timer System Service Library.
Refer to each section for a detailed description.
5.7.8.7.1 System Level Interaction Functions
5.7.8.7.1.1 SYS_TMR_Deinitialize Function
C
void SYS_TMR_Deinitialize(
SYS_MODULE_OBJ object
);
Description
This function deinitializes the specific module instance disabling its operation (and any hardware for driver modules). Resets all
of the internal data structures and fields for the specified instance to the default settings.
Preconditions
The SYS_TMR_Initialize function should have been called before calling this function.
Parameters
Parameters Description
object SYS TMR object handle, returned from SYS_TMR_Initialize
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Returns
None.
Example
SYS_MODULE_OBJ object; // Returned from SYS_TMR_Initialize
SYS_STATUS status;
SYS_TMR_Deinitialize (object);
status = SYS_TMR_Status (object);
if (SYS_MODULE_DEINITIALIZED == status)
{
// Check again later if you need to know
// when the SYS TMR is deinitialized.
}
Remarks: Once the Initialize operation has been called, the Deinitialize
operation must be called before the Initialize operation can be called
again.
5.7.8.7.1.2 SYS_TMR_Initialize Function
C
SYS_MODULE_OBJ SYS_TMR_Initialize(
const SYS_MODULE_INDEX index,
const SYS_MODULE_INIT * const init
);
Description
This function initializes hardware for the instance of the Timer module, using the specified hardware initialization data. It also
initializes any internal data structures.
Preconditions
None.
Parameters
Parameters Description
index Index for the instance to be initialized
init Pointer to a data structure containing any data necessary to initialize the sys timer.
This pointer may be null if no data is required because static overrides have been
provided.
Returns
If successful, returns a valid handle to an object. Otherwise, it returns SYS_MODULE_OBJ_INVALID. The returned object must
be passed as argument to SYS_TMR_Reinitialize, SYS_TMR_Deinitialize, SYS_TMR_Tasks and SYS_TMR_Status routines.
Example
SYS_MODULE_OBJ objectHandle;
SYS_TMR_INIT initConfig;
// Populate the timer initialization structure
initConfig.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
initConfig.drvIndex = DRV_TMR_INDEX_0;
initConfig.alarmPeriod = 100;
objectHandle = SYS_TMR_Initialize (SYS_TMR_INDEX_0, (SYS_MODULE_INIT*)&initConfig);
if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
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Remarks: This routine should only be called once during system initialization
unless SYS_TMR_Deinitialize is first called to deinitialize the device
instance before reinitializing it. If the system was already initialized
it safely returns without causing any disturbance.
5.7.8.7.1.3 SYS_TMR_Reinitialize Function
C
void SYS_TMR_Reinitialize(
SYS_MODULE_OBJ object,
const SYS_MODULE_INIT * const init
);
Description
This function reinitializes and refreshes the hardware for the instance of the Timer module using the supplied data. It modifies
the internal data structure.
Preconditions
The SYS_TMR_Initialize function should have been called before calling this function.
Parameters
Parameters Description
object Identifies the SYS TMR Object returned by the Initialize interface
init Pointer to the data structure containing any data necessary to initialize the
hardware
Returns
None
Example
SYS_MODULE_OBJ objectHandle;
SYS_TMR_INIT initConfig;
SYS_STATUS tmrStatus;
// Populate the timer initialization structure
initConfig.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
initConfig.drvIndex = DRV_TMR_INDEX_0;
initConfig.alarmPeriod = 100;
SYS_TMR_Reinitialize (objectHandle, (SYS_MODULE_INIT*)&initConfig);
tmrStatus = SYS_TMR_Status (object);
if (SYS_STATUS_BUSY == tmrStatus)
{
// Check again later to ensure the driver is ready
}
else if (SYS_STATUS_ERROR >= tmrStatus)
{
// Handle error
}
Remarks: This operation uses the same initialization data structure as the
SYS_TMR_Initialize operation. This operation can be used to change the
power state of a TMR module. This function can be called multiple times
to reinitialize the module. This operation uses the same initialization
data structure as the Initialize operation. This operation can also be
used to refresh the hardware registers as defined by the initialization
data.
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5.7.8.7.1.4 SYS_TMR_Status Function
C
SYS_STATUS SYS_TMR_Status(
SYS_MODULE_OBJ object
);
Description
This function returns the status of the specific module instance disabling its operation (and any hardware for driver modules).
Preconditions
The SYS_TMR_Initialize function should have been called before calling this function.
Parameters
Parameters Description
object SYS TMR object handle, returned from SYS_TMR_Initialize
Returns
SYS_STATUS_READY - Indicates that the driver is busy with a previous system level operation and cannot start another
Remarks
Any value greater than SYS_STATUS_READY is also a normal running state in which the driver is ready to accept new
operations
SYS_STATUS_BUSY - Indicates that the driver is busy with a previous system level operation and cannot start another
SYS_STATUS_ERROR - Indicates that the driver is in an error state
Any value less than SYS_STATUS_ERROR is also an error state.
SYS_MODULE_DEINITIALIZED - Indicates that the driver has been de-initialized
This value is less than SYS_STATUS_ERROR.
Example
SYS_MODULE_OBJ object; // Returned from SYS_TMR_Initialize
SYS_STATUS tmrStatus;
tmrStatus = SYS_TMR_Status (object);
else if (SYS_STATUS_ERROR >= tmrStatus)
{
// Handle error
}
Remarks: Once the Initialize operation has been called, the Deinitialize
operation must be called before the Initialize operation can be called
again.
5.7.8.7.1.5 SYS_TMR_Tasks Function
C
void SYS_TMR_Tasks(
SYS_MODULE_OBJ object
);
Description
This function is used to maintain the system timer's internal state machine and implement its ISR for interrupt-driven
implementations.
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Preconditions
The SYS_TMR_Initialize function must have been called for the specified TMR driver instance.
Parameters
Parameters Description
object SYS TMR object handle, returned from SYS_TMR_Initialize
Returns
None
Remarks
This function is normally not called directly by an application. It is called by the system's Tasks routine (SYS_Tasks) or by the
apropriate raw ISR.
Example
SYS_MODULE_OBJ object; // Returned from SYS_TMR_Initialize
while (true)
{
SYS_TMR_Tasks (object);
// Do other tasks
}
5.7.8.7.2 Timed Callback Functions
5.7.8.7.2.1 SYS_TMR_CallbackPeriodic Function
C
SYS_TMR_HANDLE SYS_TMR_CallbackPeriodic(
unsigned int period,
SYS_TMR_CALLBACK callback
);
Description
This function registers the periodic callback service corresponding to the configuration paramenters passed by the user.
Preconditions
The SYS_TMR_Initialize function should have been called before calling this function.
Parameters
Parameters Description
period Periodic delay in milliseconds
callback Pointer to a callback routine that will be called periodically
Returns
A valid event handler of type SYS_TMR_HANDLE is returned.
Example
SYS_TMR_HANDLE handle;
unsigned int period = 20;
void Test_Callback1 (void);
handle = SYS_TMR_CallbackPeriodic (period, &Test_Callback1);
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Remarks: The Period chosen should be a multiple of the driver's alarm period. For example,
if the alarm period is 10 ms, the period should be a multiple of 10.
5.7.8.7.2.2 SYS_TMR_CallbackSingle Function
C
SYS_TMR_HANDLE SYS_TMR_CallbackSingle(
unsigned int period,
SYS_TMR_CALLBACK callback
);
Description
This function registers a one-shot/single callback service corresponding to the configuration paramenters passed by the user.
Preconditions
The SYS_TMR_Initialize function should have been called before calling this function.
Parameters
Parameters Description
period Periodic delay in milliseconds
callback Pointer to a callback routine which will be called periodically
Returns
A valid event handler of type SYS_TMR_HANDLE is returned.
Example
SYS_TMR_HANDLE handle;
unsigned int period = 20;
void Test_Callback1 (void);
handle = SYS_TMR_CallbackSingle (period, &Test_Callback1);
Remarks: None.
5.7.8.7.2.3 SYS_TMR_CallbackStop Function
C
void SYS_TMR_CallbackStop(
SYS_TMR_HANDLE handle
);
Description
This function stops the previously registered periodic callbacks service.
Preconditions
The SYS_TMR_CallbackPeriodic function should have been called before calling this function.
Parameters
Parameters Description
handle A valid callback service handle, returned from the system API
SYS_TMR_CallbackPeriodic
Returns
None.
Example
SYS_TMR_HANDLE handle;
uint16_t period = 20;
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void Test_Callback1 (void);
handle = SYS_TMR_CallbackPeriodic (period, &Test_Callback1);
...
...
SYS_TMR_CallbackStop (handle);
Remarks: None.
5.7.8.7.3 Timed Delay Functions
5.7.8.7.3.1 SYS_TMR_DelayMS Function
C
SYS_TMR_HANDLE SYS_TMR_DelayMS(
unsigned int delay
);
Description
This function registers an event for the specified delay.
Preconditions
The SYS_TMR_Initialize function should have been called before calling this function.
Parameters
Parameters Description
delay Indicates the delay required in milliseconds
Returns
A valid event handler of type SYS_TMR_HANDLE is returned.
Example
SYS_TMR_DelayStart (50);
Remarks: Works only in Interrupt mode.
5.7.8.7.3.2 SYS_TMR_DelayStatusGet Function
C
SYS_TMR_DELAY_STATUS SYS_TMR_DelayStatusGet(
SYS_TMR_HANDLE handle
);
Description
This function intimates if the previously configured delay has elapsed.
Preconditions
The SYS_TMR_DelayStart function should have been called before calling this function.
Parameters
Parameters Description
handle A valid callback service handle, returned from the system API SYS_TMR_DelayMS
Returns
One of the possible values of SYS_TMR_DELAY_STATUS.
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Example
if (SYS_TMR_DELAY_EXPIRED == SYS_TMR_DelayStatusGet ())
// Do Something
Remarks: None.
5.7.8.7.4 Miscellaneous Functions
5.7.8.7.4.1 SYS_TMR_AlarmPeriodGet Function
C
uint32_t SYS_TMR_AlarmPeriodGet();
Description
This function obtains the previously configured alarm period.
Preconditions
The SYS_TMR_Initialize function should have been called before calling this function.
Returns
uint32_t - Alarm period in milliseconds
Example
uint32_t period;
period = SYS_TMR_AlarmPeriodGet();
Remarks: None.
5.7.8.7.4.2 SYS_TMR_TickCountGet Function
C
uint32_t SYS_TMR_TickCountGet();
Description
This function provides the current counter value.
Preconditions
The SYS_TMR_CallbackPeriodic function should have been called before calling this function.
Returns
uint32_t - Current system timer tick count value
Example
uint32_t count;
count = SYS_TMR_TickCountGet ();
Remarks: None.
5.7.8.7.5 Data Types and Constants
5.7.8.7.5.1 SYS_TMR_CALLBACK Type
C
typedef void (* SYS_TMR_CALLBACK)(void);
Description
SYS TMR Callback Function
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This data type defines a pointer callback function.
Remarks
None.
5.7.8.7.5.2 SYS_TMR_DELAY_STATUS Enumeration
C
typedef enum {
SYS_TMR_DELAY_IDLE,
SYS_TMR_DELAY_EXPIRED,
SYS_TMR_DELAY_NOT_EXPIRED,
SYS_TMR_DELAY_ERROR
} SYS_TMR_DELAY_STATUS;
Description
Callback service type enumeration
This data type defines the callback service type.
Members
Members Description
SYS_TMR_DELAY_IDLE Delay Idle
SYS_TMR_DELAY_EXPIRED Delay Expired
SYS_TMR_DELAY_NOT_EXPIRED Delay not yet expired
SYS_TMR_DELAY_ERROR delay error
Remarks
None.
5.7.8.7.5.3 SYS_TMR_HANDLE Type
C
typedef int8_t SYS_TMR_HANDLE;
Description
SYS TMR Handle
This event handle identifies a registered instance of an event. Every time the application that tries to access the paramateres
with respect to a particular event, shall used this event handle to refer to that event.
Remarks
None.
5.7.8.7.5.4 SYS_TMR_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
SYS_MODULE_INDEX drvIndex;
uint32_t alarmPeriod;
} SYS_TMR_INIT;
Description
SYS TMR Initialize structure
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This structure identifies the system timer initialize structure.
Members
Members Description
SYS_MODULE_INIT moduleInit; System module initialization
SYS_MODULE_INDEX drvIndex; Driver Module index
uint32_t alarmPeriod; Alarm period in ms
Remarks
None.
5.7.8.7.5.5 SYS_TMR_HANDLE_INVALID Macro
C
#define SYS_TMR_HANDLE_INVALID ((int8_t)-1)
Description
SYS Timer invalid handle macro definition
This enumeration identifies the invalid handle of the system timer.
Remarks
None.
5.7.8.7.5.6 SYS_TMR_INDEX_0 Macro
C
#define SYS_TMR_INDEX_0 0
Description
SYS Timer Module Index Numbers
These constants provide Timer System Service index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals.
5.7.8.7.5.7 SYS_TMR_RUNNING Macro
C
#define SYS_TMR_RUNNING (SYS_STATUS_READY + 1)
Description
SYS Timer Module specific Status
This enumeration identifies the current status/state of the system timer.
Remarks
This enumeration is the return type for the system-level status routine defined by each device driver or system module (for
example: SYS_TMR_Status).
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5.7.8.8 Files
Files
Name Description
sys_tmr.h Timer System Service interface definition.
sys_tmr_config.h Contains configuration definitions that are common to timer system services and
aggregrates the configuration files for the system services.
Description
5.7.8.8.1 sys_tmr.h
Timer System Service Interface Definition
This file contains the interface definition for the Timer System Service. It provides a way to interact with the Timer subsystem to
manage the timing requests supported by the system.
Enumerations
Name Description
SYS_TMR_DELAY_STATUS Defines the callback service type.
Functions
Name Description
SYS_TMR_AlarmPeriodGet Returns the previously configured alarm period.
SYS_TMR_CallbackPeriodic The Periodic callback is registered and started using this function.
SYS_TMR_CallbackSingle The one-shot/single callback is registered and started using this function.
SYS_TMR_CallbackStop Stops the periodic callback service.
SYS_TMR_Deinitialize Deinitializes the specific module instance of the TMR module
SYS_TMR_DelayMS Registers an event for the specified delay.
SYS_TMR_DelayStatusGet Intimates if the previously configured delay has elapsed.
SYS_TMR_Initialize Initializes hardware and data for the instance of the Timer module and opens the
specific module instance.
SYS_TMR_Reinitialize Reinitializes and refreshes the hardware for the instance of the Timer module.
SYS_TMR_Status Returns status of the specific instance of the Timer module.
SYS_TMR_Tasks Maintains the system timer's state machine and implements its ISR.
SYS_TMR_TickCountGet Provides the current counter value.
Macros
Name Description
SYS_TMR_HANDLE_INVALID Identifies the invalid handle of the system timer.
SYS_TMR_INDEX_0 Timer System Service index definitions.
SYS_TMR_RUNNING Identifies the current status/state of the system timer.
Structures
Name Description
SYS_TMR_INIT Identifies the system timer initialize structure.
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Types
Name Description
SYS_TMR_CALLBACK Defines a pointer to a callback function.
SYS_TMR_HANDLE Identifies a particular registered event instance.
File Name
sys_tmr.h
Company
Microchip Technology Inc.
5.7.8.8.2 sys_tmr_config.h
Timer System Service Configuration Definitions for the Template Version
This file contains configuration definitions that are common to timer drivers and aggregrates the configuration files for the system
services.
Macros
Name Description
SYS_TMR_ERROR_TOLERANCE Sets the error tolerance in milliseconds.
SYS_TMR_INTERRUPT_MODE Activates the Interrupt mode.
SYS_TMR_MAX_PERIODIC_EVENTS Sets the maximum periodic multi-event callbacks supported.
SYS_TMR_SINGLE_PERIODIC_EVENT Sets the type of the periodic event.
File Name
sys_tmr_config.h
Company
Microchip Technology Inc.
5.7.9 Watchdog Timer (WDT) System Service Library
5.7.9.1 Introduction
Watchdog Timer (WDT) System Service Library
for
Microchip Microcontrollers
The primary function of the Watchdog Timer (WDT) is to reset the microcontroller, in the event of a software malfunction, by
resetting the device if it has not been cleared by software. To ensure that application doesn't hang, the application is required to
reset the timer periodically. It can also be used to wake the device from Sleep or Idle mode. The WDT is a free-running timer
which uses the low-power RC oscillator and requires no external components. Therefore, the WDT will continue to operate even
if the system’s primary clock source is stopped.
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This library provides a low-level abstraction of the Watchdog Timer System Service Library that is available on the Microchip
family of microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module
without the necessity of interacting directly with the module's registers, there by abstracting differences from one microcontroller
variant to another.
5.7.9.2 Release Notes
MPLAB Harmony Version: v0.70b Watchdog Timer (WDT) System Service Library Version : 0.1 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.7.9.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.7.9.4 Using the Library
This topic describes the basic architecture of the Watchdog Timer System Service Library and provides information and
examples on how to use it.
Interface Header File: sys_wdt.h
The interface to the Watchdog Timer System Service library is defined in the "sys_wdt.h" header file. This file is included by the
"sys.h" file. Any C language source (.c) file that uses the Watchdog Timer System Service library should include "sys.h".
Library File:
The Watchdog Timer System Service library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the System Service interacts with the framework.
5.7 System Service Library Help MPLAB Harmony Help Watchdog Timer (WDT) System Service
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5.7.9.4.1 Abstraction Model
Watchdog Timer Software Abstraction Block Diagram
Watchdog timer uses internal Low Power RC(LPRC) oscillator as the source of clock. The clock is divided by the configured
prescalar value. There may be one more postscalar divisors and these should be set through the 'configuration bits'. The divided
clock is then used to increment a counter. If the software does not clear the counter in time the counter overflows and that will
result in reset in normal mode. In case of Sleep or Idle mode the overflow will result in device wakeup.
In case of windowed mode, resetting the counter when the count is not in the window specified will also lead to a reset.
5.7.9.4.2 Library Overview
Refer to the System Services Overview section for how the system services operates in a system.
The library interface routines are divided into various sub-sections, each sub-section addresses one of the blocks of the overall
operation of the Watchdog Timer module.
Library Interface Section Description
Enable and Disable Functions APIs to enable and disable the Watchdog Timer
Clearing the Timer Functions API to clear the Watchdog Timer
5.7.9.4.3 How the Library Works
Initialization of Watchdog Timer:
In case of devices which has 'Window mode', use the argument to control the window mode. The argument will be discarded in
case of devices which doesn't has 'Window mode'.
SYS_WDT_Enable(true);
//Some code
SYS_WDT_Enable(false);
//Some code
SYS_WDT_Disable();
Note: For all the above code to work, the watchdog timer should not be controlled through configuration bits.
Service the Watchdog Timer:
To ensure the normal operation of the system, the software must clear the Watchdog timer periodically.
SYS_WDT_TimerClear();
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Note: Not all modes are available on all devices. Please refer to the specific device data sheet to determine the supported
modes.
5.7.9.5 Configuring the Library
Macros
Name Description
WDT_PLIB_ID Configures the module's ID used by the peripheral library.
Description
The configuration of the Watchdog Timer System Service is based on the file sys_config.h
This header file contains the configuration selection for the Watchdog Timer System Service. Based on the selections made, the
Watchdog Timer System Service will support or not support selected features. These configuration settings will apply to all
instances of the Watchdog Timer System Service.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.7.9.5.1 WDT_PLIB_ID Macro
C
#define WDT_PLIB_ID WDT_ID_1
Description
Watchdog timer module ID used by the Peripheral Library
This macro configures the module's ID used by the peripheral library.
Remarks
None.
5.7.9.6 Builiding the Library
This section list the files that are available in the \src of the Watchdog Timer System Service driver. It lists which files need to be
included in the build based on either a hardware feature present on the board or configuration option selected by the system.
5.7.9.7 Library Interface
Clearing the Timer Functions
Name Description
SYS_WDT_TimerClear Reset the WDT.
Enable and Disable Functions
Name Description
SYS_WDT_Disable Disables the WDT if it is enabled in software.
SYS_WDT_Enable Enables the WDT. The argument 'windowModeEnable' will be used only for those
devices that support 'window mode'. Otherwise, it will be discarded.
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Description
This section describes the Application Programming Interface (API) functions of the Watchdog Timer System Service.
Refer to each section for a detailed description.
5.7.9.7.1 Enable and Disable Functions
5.7.9.7.1.1 SYS_WDT_Disable Function
C
void SYS_WDT_Disable();
Description
This function disables the WDT if it is enabled in software. If the WDT is enabled through 'configuration bits' it cannot be disabled
using this function.
Preconditions
The WDT should be disabled through 'configuration bits'.
Returns
None.
Remarks
The example code doesn't include the settings that should be done through configuration bits.
Example
SYS_WDT_Disable();
5.7.9.7.1.2 SYS_WDT_Enable Function
C
void SYS_WDT_Enable(
bool windowModeEnable
);
Description
This function enables the WDT. The argument 'windowModeEnable' will be used only for those devices that support 'window
mode'. Otherwise, the argument will be discarded. This function could be called multiple times to enable/disable the 'window
mode'.
Preconditions
None.
Parameters
Parameters Description
5.7.9.7.2 Clearing the Timer Functions
5.7.9.7.2.1 SYS_WDT_TimerClear Function
C
void SYS_WDT_TimerClear();
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Description
This function clears the WDT counter. The WDT should be cleared periodically before the count overflows and forces the device
to Reset.
Preconditions
None.
Returns
None.
Remarks
Clearing the WDT before the count reaches the window, will cause a reset in Windowed mode.
The example code doesn't include the settings that should be done through Configuration bits.
This feature is not available on all devices. Please refer to the specific device data sheet to determine whether this feature is
supported.
Example
//Application loop
while(1)
{
SYS_WDT_TimerClear();
//user code
}
5.7.9.8 Files
Files
Name Description
sys_wdt.h Watchdog Timer (WDT) System Service inteface definition.
sys_wdt_config.h Watchdog Timer (WDT) System Service interface definition.
Description
5.7.9.8.1 sys_wdt.h
Watchdog Timer System Service Interface Definition
This file contains the interface definition for the WDT System Service. It provides a way to interact with the WDT subsystem to
manage the timing requests supported by the system.
Functions
Name Description
SYS_WDT_Disable Disables the WDT if it is enabled in software.
SYS_WDT_Enable Enables the WDT. The argument 'windowModeEnable' will be used only for those
devices that support 'window mode'. Otherwise, it will be discarded.
SYS_WDT_TimerClear Reset the WDT.
File Name
sys_wdt.h
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Company
Microchip Technology Inc.
5.7.9.8.2 sys_wdt_config.h
Watchdog Timer System Service Interface Definition
This file contains the interface definition for the WDT System Service. It provides a way to interact with the Watchdog timer
subsystem to manage the timing requests supported by the system
Macros
Name Description
WDT_PLIB_ID Configures the module's ID used by the peripheral library.
File Name
sys_wdt.h
Company
Microchip Technology Inc.
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5.8 TCP/IP Stack Library Help
5.8.1 TCP/IP Library Overview
5.8.1.1 Introduction
This topic provides an overview of the TCP/IP Stack in MPLAB Harmony.
Description
The MPLAB Harmony TCP/IP Stack provides a foundation for embedded network applications by handling most of the
interaction required between the physical network port and your application. It includes modules for several commonly used
application layers, including HTTP for serving web pages, SMTP for sending e-mails, SNMP for providing status and control,
Telnet, TFTP, Serial-to-Ethernet and much more. In addition, the stack includes light-weight and high-performance
implementations of the TCP and UDP transport layers, as well as other supporting modules such as IP, ICMP, DHCP, ARP, and
DNS.
This help file serves two purposes. The first is to be a guide for first-time users of the TCP/IP Stack. The Getting Started section
begins a series of pages to help you become familiar with the stack and configure it for use on a Microchip development board.
The second purpose is to serve as a programmer's reference guide to the features and APIs available in the TCP/IP Stack.
5.8.1.2 Release Notes
MPLAB Harmony Version: v0.70b TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Description
Resource Usage and Network Metrics for the PIC32MX
Memory and Flash usage
Module RAM
No
Optimization
Flash
No
Optimization
RAM
Optimize
for Size
Flash
Optimize for
Size
RAM
Optimized
for Speed
Flash
Optimized
for Speed
Core (arp, tcp manager, tcp helpers,
hash functions, etc.)
356 51,380 352 24,772 352 34,812
Berkeley API 116 7,464 116 4,116 116 7,080
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Commands for TCP Configuration 120 18,348 120 13,104 124 14,556
DHCP Client 40 11,328 40 6,036 44 7,676
DHCP Server 76 15,188 76 7,464 76 10,456
DNS Client 66 6,868 62 3,496 68 4,368
DNS Server 86 2,276 86 1,052 88 1,192
FTP Server 40 11,368 40 5,384 40 6,548
HTTP Server 24 19,964 24 10,404 24 13,128
ICMPv4 Server 20 2,472 20 1,112 20 1,264
ICMPv6 Server 20 11,852 20 6,332 20 7,336
IPerf 252 22,344 252 12,136 252 14,240
IPv4 40 4,572 40 2,348 40 2,640
IPv6 224 45,488 224 25,060 224 40,480
Microchip Embedded Ethernet Device
Discoverer
36 3,280 36 1,764 36 2,164
NetBIOS Name Resolution 12 2,884 12 1,372 12 2,024
Reboot Server 12 1,048 12 576 12 764
SMTP Client 98 8,252 102 4,324 104 6,052
SNMP Server 72 30,616 68 16,244 72 28,900
SNMPv3 Server 864 32,600 864 15,580 864 27,052
SNTP Client 72 2,796 72 1,572 72 1,780
SSL 72 33,416 72 18,096 72 49,252
TCP Protocol 28 42,268 28 21,604 32 28,556
Telnet Server 28 3,708 28 1,908 28 2,236
UDP Protocol 36 17,052 36 9,308 40 11,884
Zero Config for Local Link 25 22,296 25 10,892 25 13,116
Network Performance measured with iPerf
The following commands were used to generate the performance numbers:
• UDP/IP Client:
• PIC32 Board: iperf -c -u -b 100M -i 5 -t 20
• PC: iperf -s -u -i 5
• UDP/IP Server:
• PIC32 Board: iperf -s -u -i 5
• PC: iperf -c mchpboard_e -u -b 100M -i 5 -t 20
• TCP/IP Client
• PIC32 Board: iperf -c -t 10 -i 5 -l 1024 -x 100M -M 1460
• PC: iperf -s -i 5 -m -w 10K –N
• TCP/IP Server
• PIC32 Board: iperf -s -i 5 -x 100M
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• PC: iperf -c mchpboard_e -t 10 -i 5 -l 1024
UDP/IP Client UDP/IP Server TCP/IP Client TCP/IP Server
89.3 MBits/sec 95.7 MBits/sec 50.1 MBits/sec 60.3 MBits/sec
Resource Usage and Network Metrics for the PIC32MZ
Memory and Flash usage
Module RAM
No
Optimization
Flash
No
Optimization
RAM
Optimized
for Size
Flash
Optimized
for Size
RAM
Optimized
for Speed
Flash
Optimized
for Speed
Core (arp, tcp manager, tcp helpers,
hash functions, etc.)
356 51,112 352 24,868 352 34,632
Berkeley API 116 7,348 116 4,116 116 7,056
Commands for TCP Configuration 120 18,232 120 13,084 124 14,472
DHCP Client 40 11,276 40 6,040 44 7,660
DHCP Server 76 15,072 76 7,464 76 10,396
DNS Client 66 6,752 62 3,488 68 4,324
DNS Server 86 2,160 86 1,052 88 1,172
FTP Server 40 11,252 40 5,372 40 6,516
HTTP Server 24 19,848 24 10,284 24 12,988
ICMPv4 Server 20 2,356 20 1,112 20 1,240
ICMPv6 Server 20 12,336 20 6,668 20 7,572
IPerf 252 23,132 252 12,508 252 14,396
IPv4 40 4,576 40 2,368 40 2,628
IPv6 224 45,896 224 24,988 224 40,296
Microchip Embedded Ethernet Device
Discoverer
36 3,164 36 1,748 36 1,980
NetBIOS Name Resolution 12 2,768 12 1,372 12 2,000
Reboot Server 12 932 12 572 12 744
SMTP Client 98 8,136 102 4,304 104 6,008
SNMP Server 72 30,500 68 16,188 72 28,500
SNMPv3 Server 864 32,368 864 15,396 864 26,804
SNTP Client 72 2,780 72 1,592 72 1,772
SSL 72 33,068 72 18,068 72 49,156
TCP Protocol 28 42,496 28 21,604 32 28,620
Telnet Server 28 3,592 28 1,896 28 2,156
UDP Protocol 36 17,320 36 9,360 40 11,812
Zero Config for Local Link 25 22,488 25 11,000 25 13,156
Network Performance measured with iPerf
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The following commands were used to generate the performance numbers:
• UDP/IP Client:
• PIC32 Board: iperf -c -u -b 100M -i 5 -t 20
• PC: iperf -s -u -i 5
• UDP/IP Server:
• PIC32 Board: iperf -s -u -i 5
• PC: iperf -c mchpboard_e -u -b 100M -i 5 -t 20
• TCP/IP Client
• PIC32 Board: iperf -c -t 10 -i 5 -l 1024 -x 100M -M 1460
• PC: iperf -s -i 5 -m -w 10K –N
• TCP/IP Server
• PIC32 Board: iperf -s -i 5 -x 100M
• PC: iperf -c mchpboard_e -t 10 -i 5 -l 1024
UDP/IP Client UDP/IP Server TCP/IP Client TCP/IP Server
71.6 MBits/sec 95.7 MBits/sec 46.6 MBits/sec 44.5 MBits/sec
5.8.1.3 SW License Agreement
MICROCHIP IS WILLING TO LICENSE THE ACCOMPANYING SOFTWARE AND DOCUMENTATION TO YOU ONLY ON THE
CONDITION THAT YOU ACCEPT ALL OF THE FOLLOWING TERMS. TO ACCEPT THE TERMS OF THIS LICENSE, CLICK "I
ACCEPT" AND PROCEED WITH THE DOWNLOAD OR INSTALL. IF YOU DO NOT ACCEPT THESE LICENSE TERMS,
CLICK "I DO NOT ACCEPT," AND DO NOT DOWNLOAD OR INSTALL THIS SOFTWARE.
NON-EXCLUSIVE SOFTWARE LICENSE AGREEMENT
This Nonexclusive Software License Agreement ("Agreement") is a contract between you, your heirs, successors and assigns
("Licensee") and Microchip Technology Incorporated, a Delaware corporation, with a principal place of business at 2355 W.
Chandler Blvd., Chandler, AZ 85224-6199, and its subsidiary, Microchip Technology (Barbados) II Incorporated (collectively,
"Microchip") for the accompanying Microchip software including, but not limited to, Graphics Library Software, IrDA Stack
Software, MCHPFSUSB Stack Software, Memory Disk Drive File System Software, mTouch(TM) Capacitive Library Software,
Smart Card Library Software, TCP/IP Stack Software, MiWi(TM) DE Software, Security Package Software, and/or any PC
programs and any updates thereto (collectively, the "Software"), and accompanying documentation, including images and any
other graphic resources provided by Microchip ("Documentation").
1. Definitions. As used in this Agreement, the following capitalized terms will have the meanings defined below: a. "Microchip
Products" means Microchip microcontrollers and Microchip digital signal controllers.
b. "Licensee Products" means Licensee products that use or incorporate Microchip Products.
c. "Object Code" means the Software computer programming code that is in binary form (including related documentation, if
any), and error corrections, improvements, modifications, and updates.
d. "Source Code" means the Software computer programming code that may be printed out or displayed in human readable form
(including related programmer comments and documentation, if any), and error corrections, improvements, modifications, and
updates.
e. "Third Party" means Licensee’s agents, representatives, consultants, clients, customers, or contract manufacturers. f. "Third
Party Products" means Third Party products that use or incorporate Microchip Products.
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2. Software License Grant. Microchip grants strictly to Licensee a non-exclusive, non-transferable, worldwide license to: a. use
the Software in connection with Licensee Products and/or Third Party Products;
b. if Source Code is provided, modify the Software; provided that Licensee clearly notifies Third Parties regarding the source of
such modifications;
c. distribute the Software to Third Parties for use in Third Party Products, so long as such Third Party agrees to be bound by this
Agreement (in writing or by "click to accept ( see page 174)") and this Agreement accompanies such distribution;
d. sublicense to a Third Party to use the Software, so long as such Third Party agrees to be bound by this Agreement (in writing
or by "click to accept ( see page 174)");
e. with respect to the TCP/IP Stack Software, Licensee may port the ENC28J60.c, ENC28J60.h, ENCX24J600.c, and
ENCX24J600.h driver source files to a non-Microchip Product used in conjunction with a Microchip ethernet controller;
f. with respect to the MiWi (TM) DE Software, Licensee may only exercise its rights when the Software is embedded on a
Microchip Product and used with a Microchip radio frequency transceiver or UBEC UZ2400 radio frequency transceiver which
are integrated into Licensee Products or Third Party Products.
For purposes of clarity, Licensee may NOT embed the Software on a non-Microchip Product, except as described in this Section.
3. Documentation License Grant. Microchip grants strictly to Licensee a non-exclusive, non-transferable, worldwide license to
use the Documentation in support of Licensee's authorized use of the Software
4. Third Party Requirements. Licensee acknowledges that it is Licensee’s responsibility to comply with any third party license
terms or requirements applicable to the use of such third party software, specifications, systems, or tools. This includes, by way
of example but not as a limitation, any standards setting organizations requirements and, particularly with respect to the Security
Package Software, local encryption laws and requirements. Microchip is not responsible and will not be held responsible in any
manner for Licensee’s failure to comply with such applicable terms or requirements.
5. Open Source Components. Notwithstanding the license grant in Section 1 above, Licensee further acknowledges that certain
components of the Software may be covered by so-called "open source" software licenses ("Open Source Components"). Open
Source Components means any software licenses approved as open source licenses by the Open Source Initiative or any
substantially similar licenses, including without limitation any license that, as a condition of distribution of the software licensed
under such license, requires that the distributor make the software available in source code format. To the extent required by the
licenses covering Open Source Components, the terms of such license will apply in lieu of the terms of this Agreement. To the
extent the terms of the licenses applicable to Open Source Components prohibit any of the restrictions in this Agreement with
respect to such Open Source Components, such restrictions will not apply to such Open Source Component.
6. Licensee Obligations. Licensee will not: (a) engage in unauthorized use, modification, disclosure or distribution of Software or
Documentation, or its derivatives; (b) use all or any portion of the Software, Documentation, or its derivatives except in
conjunction with Microchip Products, Licensee Products or Third Party Products; or (c) reverse engineer (by disassembly,
decompilation or otherwise) Software or any portion thereof. Licensee may not remove or alter any Microchip copyright or other
proprietary rights notice posted in any portion of the Software or Documentation. Licensee will defend, indemnify and hold
Microchip and its subsidiaries harmless from and against any and all claims, costs, damages, expenses (including reasonable
attorney's fees), liabilities, and losses, including without limitation: (x) any claims directly or indirectly arising from or related to the
use, modification, disclosure or distribution of the Software, Documentation, or any intellectual property rights related thereto; (y)
the use, sale and distribution of Licensee Products or Third Party Products; and (z) breach of this Agreement.
7. Confidentiality. Licensee agrees that the Software (including but not limited to the Source Code, Object Code and library files)
and its derivatives, Documentation and underlying inventions, algorithms, know-how and ideas relating to the Software and the
Documentation are proprietary information belonging to Microchip and its licensors ("Proprietary Information"). Except as
expressly and unambiguously allowed herein, Licensee will hold in confidence and not use or disclose any Proprietary
Information and will similarly bind its employees and Third Party(ies) in writing. Proprietary Information will not include
information that: (i) is in or enters the public domain without breach of this Agreement and through no fault of the receiving party;
(ii) the receiving party was legally in possession of prior to receiving it; (iii) the receiving party can demonstrate was developed by
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the receiving party independently and without use of or reference to the disclosing party's Proprietary Information; or (iv) the
receiving party receives from a third party without restriction on disclosure. If Licensee is required to disclose Proprietary
Information by law, court order, or government agency, License will give Microchip prompt notice of such requirement in order to
allow Microchip to object or limit such disclosure. Licensee agrees that the provisions of this Agreement regarding unauthorized
use and nondisclosure of the Software, Documentation and related Proprietary Rights are necessary to protect the legitimate
business interests of Microchip and its licensors and that monetary damage alone cannot adequately compensate Microchip or
its licensors if such provisions are violated. Licensee, therefore, agrees that if Microchip alleges that Licensee or Third Party has
breached or violated such provision then Microchip will have the right to injunctive relief, without the requirement for the posting
of a bond, in addition to all other remedies at law or in equity.
8. Ownership of Proprietary Rights. Microchip and its licensors retain all right, title and interest in and to the Software and
Documentation including, but not limited to all patent, copyright, trade secret and other intellectual property rights in the
Software, Documentation, and underlying technology and all copies and derivative works thereof (by whomever produced).
Licensee and Third Party use of such modifications and derivatives is limited to the license rights described in this Agreement.
9. Termination of Agreement. Without prejudice to any other rights, this Agreement terminates immediately, without notice by
Microchip, upon a failure by Licensee or Third Party to comply with any provision of this Agreement. Upon termination, Licensee
and Third Party will immediately stop using the Software, Documentation, and derivatives thereof, and immediately destroy all
such copies.
10. Warranty Disclaimers. THE SOFTWARE AND DOCUMENTATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. MICROCHIP AND ITS
LICENSORS ASSUME NO RESPONSIBILITY FOR THE ACCURACY, RELIABILITY OR APPLICATION OF THE SOFTWARE
OR DOCUMENTATION. MICROCHIP AND ITS LICENSORS DO NOT WARRANT THAT THE SOFTWARE WILL MEET
REQUIREMENTS OF LICENSEE OR THIRD PARTY, BE UNINTERRUPTED OR ERROR-FREE. MICROCHIP AND ITS
LICENSORS HAVE NO OBLIGATION TO CORRECT ANY DEFECTS IN THE SOFTWARE.
11. Limited Liability. IN NO EVENT WILL MICROCHIP OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER ANY LEGAL
OR EQUITABLE THEORY FOR ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO
INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST
OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES
(INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS. The aggregate and cumulative
liability of Microchip and its licensors for damages hereunder will in no event exceed $1000 or the amount Licensee paid
Microchip for the Software and Documentation, whichever is greater. Licensee acknowledges that the foregoing limitations are
reasonable and an essential part of this Agreement.
12. General. THIS AGREEMENT WILL BE GOVERNED BY AND CONSTRUED UNDER THE LAWS OF THE STATE OF
ARIZONA AND THE UNITED STATES WITHOUT REGARD TO CONFLICTS OF LAWS PROVISIONS. Licensee agrees that
any disputes arising out of or related to this Agreement, Software or Documentation will be brought exclusively in either the U.S.
District Court for the District of Arizona, Phoenix Division, or the Superior Court of Arizona located in Maricopa County, Arizona.
This Agreement will constitute the entire agreement between the parties with respect to the subject matter hereof. It will not be
modified except by a written agreement signed by an authorized representative of Microchip. If any provision of this Agreement
will be held by a court of competent jurisdiction to be illegal, invalid or unenforceable, that provision will be limited or eliminated
to the minimum extent necessary so that this Agreement will otherwise remain in full force and effect and enforceable. No waiver
of any breach of any provision of this Agreement will constitute a waiver of any prior, concurrent or subsequent breach of the
same or any other provisions hereof, and no waiver will be effective unless made in writing and signed by an authorized
representative of the waiving party. Licensee agrees to comply with all import and export laws and restrictions and regulations of
the Department of Commerce or other United States or foreign agency or authority. The indemnities, obligations of
confidentiality, and limitations on liability described herein, and any right of action for breach of this Agreement prior to
termination, will survive any termination of this Agreement. Any prohibited assignment will be null and void. Use, duplication or
disclosure by the United States Government is subject to restrictions set forth in subparagraphs (a) through (d) of the
Commercial Computer-Restricted Rights clause of FAR 52.227-19 when applicable, or in subparagraph (c)(1)(ii) of the Rights in
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Technical Data and Computer Software clause at DFARS 252.227-7013, and in similar clauses in the NASA FAR Supplement.
Contractor/manufacturer is Microchip Technology Inc., 2355 W. Chandler Blvd., Chandler, AZ 85224-6199.
If Licensee has any questions about this Agreement, please write to Microchip Technology Inc., 2355 W. Chandler Blvd.,
Chandler, AZ 85224-6199 USA. ATTN: Marketing.
Copyright (c) 2012 Microchip Technology Inc. All rights reserved.
License Rev. No. 05-012412
5.8.1.4 Getting Help
This topic provides information for requesting support assistance with the TCP/IP Stack.
Description
The TCP/IP Stack is supported through Microchip's standard support channels. If you encounter difficulties, you may submit
ticket requests at http://support.microchip.com.
The Microchip forums are also an excellent source of information, with a very lively community dedicated specifically to Ethernet
and TCP/IP discussions at http://forum.microchip.com.
Microchip also offers embedded network classes through Regional Training Centers. For more information, visit
http://www.microchip.com/rtc.
5.8.1.5 Utilities
This section discusses the computer software applications included with the TCP/IP Stack.
These tools are implemented using the C# or Java programming languages, or both. The C# tools (*.exe) will require the
Microsoft® .NET Framework v2.0 to be installed on the local PC. The Java tools (*.jar) require Java Runtime Environment (JRE)
1.6 or later to be installed on the target computer.
5.8.1.5.1 MPFS2 Utility
This topic provides a description of the MPFS2 Utility.
Description
The MPFS2 Utility packages web pages into a format for efficient storage in an embedded system. It is a graphical application
for PCs that can generate MPFS2 images for storage in external storage or internal Flash program memory.
When used to build MPFS2 images, the MPFS2 Utility also indexes the dynamic variables found. It uses this information to
generate HTTPPrint.h, which ensures that the proper callback functions are invoked as necessary. It also stores this index
information along with the file in the MPFS2 image, which alleviates the task of searching from the embedded device.
Finally, when developing an application that uses external storage, the MPFS2 Utility can upload images to the external storage
device using the upload functionality built into the HTTP2 web server or FTP server.
The source code for this application is included in the Microchip Applications Libraries installer.
5.8.1.5.1.1 Building MPFS2 Images
This topic provides information for building MPFS2 images.
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Description
The MPFS2 Utility has four steps, which are denoted on the left hand side of the dialog. To build an MPFS image, select Start
With: Webpage Directory in step 1 and choose the directory in which the web pages are stored.
Step 2 selects the output format. If storing the web pages in external EEPROM or serial Flash, choose the BIN Image output
format. If internal program memory will be used, select C18/C32 Image for use with 8-bit and 32-bit parts, or ASM30 Array for
16-bit targets. To store the web pages on a device formatted with the FAT file system without compressing them into an MPFS
image, select MDD.
Step 3 asks for the MPLAB IDE project directory. The MPFS tool will write the image file to the project directory, and will also
update the HTTPPrint.h file there if needed. Select the correct directory so that the right files are modified.
Step 4 controls the upload settings. When external EEPROM or serial flash is used for storage, the option to upload the newly
created image to the board is available. Check the box next to Upload Image To to enable this feature. The target host name (or
IP address), upload protocol, and upload path may need to be changed to the one chosen when the board was first configured.
You may also need to modify the user name and password used to access the secured functionality in your application, like web
page upload. Use the Settings button to edit these values.
If internal program memory is being used, the image will be compiled in with the project and so direct uploads are not available.
Make sure to include the output source file indicated in step 3 as part of the project.
Once all the correct settings have been chosen, click the Generate button to create the image. If uploads are enabled, this will
also attempt to upload the file to the device.
5.8.1.5.1.2 Uploading Pre-built MPFS2 Images
This topic provides information on uploading pre-built MPFS2 images.
Description
There are two ways to upload a pre-built image to external storage. The first is described in the Getting Started ( see page
79) section, and involves uploading from the browser directly. The second is to use the MPFS2 Utility to upload the image. You
can select HTTP or FTP uploading to match the protocol that your application uses.
To use the MPFS2 Utility to upload an image, begin by selecting Start With: Pre-Build MPFS Image in step 1 at the top.
Choose the image file to upload.
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Steps 2 and 3 are not required for pre-built images. Proceed directly to step 4 and verify that the upload settings are correct. The
target host name (or IP address), upload protocol, and upload path may need to be changed to the one chosen when the board
was first configured. You may also need to modify the user name and password used to access the secured functionality in your
application, like web page upload. Use the Settings button to edit these values.
Once all the settings are correct, click the Upload button. The image will be uploaded to the board.
5.8.1.5.1.3 Advanced MPFS2 Settings
This topic provides information on advanced MPFS2 settings.
Description
The Advanced Settings dialog found in step 2 provides greater control over how files are processed.
The Dynamic Files list indicates which file types to parse for dynamic variables. By default, all files with the extensions htm,
html, cgi, or xml are parsed. If an application has dynamic variables in other file types, these types must be added to the list. This
field must be a comma-separated list of extensions and file names.
The Do Not Compress field indicates which file types should never be compressed. Compressing files with GZIP saves both
storage space and transmission time. However, this is only suitable for static content such as CSS or JavaScript. Any files with
dynamic variables will automatically be excluded. In addition, any file that the PIC may need to process internally should be
excluded. Files included via ~inc:filename~ should not be compressed, nor should any BIB file used for the SNMP module (if
present). Additional file types can be added to this list if a custom application will be accessing the MPFS.
The GZIP compressor will attempt to shrink all files. In some cases, especially with images, little or no compression is achieved.
When this occurs the file is stored as-is in the MPFS image.
5.8.1.5.1.4 MPFS2 Command Line Options
This topic provides a description of the MPFS2 command line options.
Description
To facilitate batch files and automation, the MPFS2 Utility also supports execution from the command line. The syntax is as
follows:
MPFS2.jar [options]
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The SourceDir, ProjectDir, and OutputFile options are required and should be enclosed in quotation marks. The OutputFile
option will be relative to ProjectDir, and cannot be a full path name. The various option switches are described in the following
table.
Switch Short Description
/BIN /b Output a BIN image (Default)
/C18_C32 /c Output a C18 or XC32 image
/ASM16 /s Output an ASM16 image
/mpfs2 /2 Use the MPFS2 format (Default)
/html "..." /h "..." File types to be parsed for dynamic variables (Default: "*.htm, *.html, *.cgi, *.xml")
/xgzip "..." /z "..." File types to be excluded from GZIP compression (Default: "*.bib, *.inc")
The command-line interface does not support image uploads. For batch or production uploads, use a tool such as wget to upload
the generated BIN image.
5.8.1.5.2 TCP/IP Discoverer
This topic provides a description of the TCP/IP Discoverer.
Description
The TCP/IP Discoverer PC project (formerly known as the Embedded Ethernet Device Discoverer) will aid in embedded product
device discovery (with the Announce ( see page 160) protocol) and will demonstrate how to write PC applications to
communicate to embedded devices.
When the "Discover Devices" button is clicked, this application will transmit a broadcast UDP packet containing the message,
"Discovery: Who is out there?" on the local network to port 30303. If any embedded devices with the Announce ( see page 160)
protocol enabled are connected to the network, they will respond with a UDP packet containing their host name (NBNS ( see
page 295)) and MAC address.
The Java source code for this application is also included. This source code should provide a rough idea of how to write a
PC-based application to communicate with your embedded devices.
5.8.2 TCP/IP Stack Porting Guide
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5.8.2.1 Introduction
Porting to the MPLAB Harmony TCP/IP Stack
This help file provides information for porting from a previous version of the TCP/IP Stack to the TCP/IP Stack within MPLAB
Harmony.
5.8.2.2 Release Notes
MPLAB Harmony Version: v0.70b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.2.3 SW License Agreement
© 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED “AS IS.” MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.2.4 Upgrading from the V5 TCP/IP Stack to the MPLAB Harmony
TCP/IP Stack
The MPLAB Harmony TCP/IP Stack is a completely new distribution, which is included as part of the MPLAB Harmony
installation. No files need to be maintained from an existing V5 TCP/IP Stack installation.
5.8.2.4.1 MPLAB Harmony TCP/IP Stack Key Features
This topic provides a description of the key features of the MPLAB Harmony TCP/IP Stack.
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Description
Note: The PIC18 device family is not supported by the MPLAB Harmony TCP/IP Stack.
The following are the key features of the MPLAB Harmony TCP/IP Stack:
• Multiple interfaces
• IPV6 support
• Fully dynamic:
• Stack initialization/deinitialization
• Up/down interface
• Resource management
• Module configuration
• Improved modularity and stack layout
• Run-time configuration through the TCP/IP console
• Interrupt driven operation
• RTOS friendly, with easy RTOS integration
5.8.2.4.2 MPLAB Harmony TCP/IP Stack Structure
This topic describes the structure of the MPLAB Harmony TCP/IP Stack.
Description
The MPLAB Harmony TCP/IP Stack consists of the following structure:
• Lowercase file names
• Underscores are used (e.g., tcpip_manager.h)
• Private headers are no longer exposed and have been moved to the source folder
• System services have been removed from the stack, such as:
• Interrupts
• Drivers
• Timer services
• File system
• Board Support Package (BSP)
By default, the TCP/IP Stack is placed into the following location during installation of MPLAB Harmony on a Windows® system:
C:\Microchip\harmony\\framework\tcpip
The following figure shows the list of files in the tcpip folder.
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5.8.2.4.3 MPLAB Harmony TCP/IP Stack Design
This topic discusses the design of the MPLAB Harmony TCP/IP Stack.
Description
The MPLAB Harmony TCP/IP Stack is designed as a part of a system running other applications, middleware, etc. Therefore, it
makes use of the system services that are available to other modules in the system or to the application, such as:
• File system
• System interrupts
• System driver services
• System timers
• System device drivers
• System command processor
• System console
• System debug services
Refer to the ./framework/tcpip/src/system folder for the header files that expose the system wide available API.
5.8.2.4.4 MPLAB Harmony TCP/IP Stack API Changes
This topic discusses the reasons behind the API changes to the MPLAB Harmony TCP/IP Stack.
Description
For most modules, the API should be backward compatible to the V5 TCP/IP Stack.
The changes in the stack API have been minimized so that the porting process is straightforward. However, new functionality
has been added because of new features, such as IPV6 support, multiple network interfaces, and the dynamic configuration of
the stack. Other than these new features, the changes to the API were only made when an existing V5 TCP/IP Stack function did
not support the required parameters/flexibility, or they were confusing.
The API changes are at the TCP, UDP, ARP, HTTP, SMTP, and stack access and initialization level.
5.8.2.4.4.1 TCP Changes
This topic discusses the changes made to the tcp.h file.
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Description
TCP Changes
The TCP/IP Stack include header file, tcp.h, has been updated as follows.
• DNS Resolution - DNS resolution is no longer performed automatically when opening a TCP socket. The TCP layer takes only
an IP address as an input parameter. If you need a DNS resolution, you have to perform it before opening a socket (see
dns.h).
• IPV6 Support - Support for IPV6 has been added
Opening TCP Sockets
To open TCP sockets, the required functions are now:
TCP_SOCKET TCPIP_TCP_ServerOpen(IP_ADDRESS_TYPE addType, TCP_PORT localPort, IP_MULTI_ADDRESS*
localAddress)
and
TCP_SOCKET TCPIP_TCP_ClientOpen(IP_ADDRESS_TYPE addType, TCP_PORT remotePort,
IP_MULTI_ADDRESS* remoteAddress)
These two new functions replace the V5 TCP/IP Stack TCPOpen function. The application code must replace the calls to
TCPOpen with TCP_SOCKET TCPIP_TCP_ServerOpen or TCP_SOCKET TCPIP_TCP_ClientOpen, as appropriate.
The new calls add the possibility to use IPV6 addresses and make clear the choice of parameters for server or client sockets.
The parameters are:
• typedef union
{
IPV4_ADDR v4Add;
IPV6_ADDR v6Add;
}IP_MULTI_ADDRESS;
• typedef enum
{
IP_ADDRESS_TYPE_ANY = 0, // either IPv4 or IPv6; unspecified;
IP_ADDRESS_TYPE_IPV4 = 1, // IPv4 address type
IP_ADDRESS_TYPE_IPV6 // IPv6 address type
}IP_ADDRESS_TYPE;
Note: Currently, IP_ADDRESS_TYPE_ANY is only supported for server sockets.
Disconnecting a Socket
The functions to disconnect a socket have changed to include added functionality:
• TCPIP_TCP_Disconnect(TCP_SOCKET hTCP)
This function closes the TX side of a connection by sending a FIN (if currently connected) to the remote node of the connection.
It no longer sends a RST signal to the remote node so that a sequence of two sequential calls to the function is no longer
needed.
If the socket has the Linger option set (default), the queued TX data transmission will be attempted before sending the FIN. If the
Linger option is off, the queued TX data will be discarded.
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No more data can be sent by this socket, but more data can be received (the socket will be eventually closed when a FIN is
received from the remote node or by a time-out dictated by the TCP_FIN_WAIT_2_TIMEOUT value in tcp_config.h).
Please note that this call may fail in which case it can be reissued.
Setting the socket options is done using the function TCPIP_TCP_OptionsSet().
• TCPIP_TCP_Abort(TCP_SOCKET hTCP, bool killSocket)
This function aborts a connection to a remote node by sending a RST (if currently connected). Any pending TX/RX data is
discarded.
A client socket will always be closed and the associated resources released. The socket cannot be used again after this call.
A server socket will abort the current connection if:
- killSocket == false (the socket will remain listening)
- killSocket == true (the socket will be closed and all associated resources released. The socket cannot be used again
after this call.)
• TCPIP_TCP_Close(TCP_SOCKET hTCP)
This function disconnects an open socket and destroys the socket handle, releasing the associated resources.
If the graceful option is set for the socket (default) a TCPIP_TCP_Disconnect will be tried (FIN will be sent):
- If the linger option is set (default) the TCPIP_TCP_Disconnect will attempt to send any queued TX data before issuing the
FIN
- If the FIN send operation fails or the socket is not connected, an abort is generated
If the graceful option is not set, or the previous step could not send the FIN:
- A TCPIP_TCP_Abort() is called, sending a RST to the remote node and communication is closed. The socket is no longer
valid and the associated resources are freed.
Setting the socket options is done using the call TCPIP_TCP_OptionsSet();.
Adjusting Socket Size
The function to adjust the size of a socket’s RX and TX buffers has changed to include added functionality:
• TCPIP_TCP_FifoSizeAdjust(TCP_SOCKET hTCP, uint16_t wMinRXSize, uint16_t wMinTXSize,
TCP_ADJUST_FLAGS vFlags)
The TX and RX FIFOs (buffers) associated with a socket are now completely separate and independent.
Two new flags, TCP_ADJUST_TX_ONLY and TCP_ADJUST_RX_ONLY, have been added, which allow changing the size of
TX and RX buffers independently. This is the preferred option.
However, when either flag is not set, for the purpose of this function, the TX and RX FIFOs are considered to be contiguous so
that the total FIFO space is divided between the TX and RX FIFOs. This provides backward compatibility with previous versions
of this function.
Note: The TX or RX associated buffer sizes can be independently changed too using the socket options. See the
TCPIP_TCP_OptionsSet help for more information.
5.8.2.4.4.2 UDP Changes
This topic discusses the changes made to the udp.h file.
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Description
UDP Changes
The TCP/IP Stack include header file, udp.h, has been updated as follows.
• DNS Resolution - DNS resolution is no longer performed automatically when opening a UDP socket. The UDP layer takes
only an IP address as an input parameter. If you need a DNS resolution, you have to perform it before opening a socket (see
dns.h).
• IPV6 Support - Support for IPV6 has been added
Opening UDP Sockets
To open UDP sockets, the required functions are now:
UDP_SOCKET TCPIP_UDP_ServerOpen(IP_ADDRESS_TYPE addType, UDP_PORT localPort, IP_MULTI_ADDRESS*
localAddress);
and
UDP_SOCKET TCPIP_UDP_ClientOpen(IP_ADDRESS_TYPE addType, UDP_PORT remotePort, IP_MULTI_ADDRESS*
remoteAddress);
These two new functions replace the V5 TCP/IP Stack UDPOpen function.
The application code must replace any calls to UDPOpen with UDP_SOCKET TCPIP_UDP_ServerOpen() or UDP_SOCKET
TCPIP_UDP_ClientOpen(), as appropriate.
Note: Currently, IP_ADDRESS_TYPE_ANY is only supported for server sockets.
5.8.2.4.4.3 ARP Changes
This topic discusses the changes made to the arp.h file.
Description
ARP Changes
The header file, arp.h, has been updated as follows.
The ARP module has been redesigned to support multiple network interfaces and to implement internal storage (caches) per
interface for eliminating the need for frequent access to the network.
Some of the most important changes include:
• Manipulation/control of the cache entries (TCPIP_ARP_EntryGet, TCPIP_ARP_EntrySet, TCPIP_ARP_EntryRemove)
with permanent entries support
• Dynamic notification mechanism (TCPIP_ARP_HandlerRegister, TCPIP_ARP_HandlerDeRegister) for signaling of the
ARP events
• Resolution calls (TCPIP_ARP_Resolve, TCPIP_ARP_Probe, TCPIP_ARP_IsResolved).
Normally, the application does not need access to the ARP module. The address resolution is performed internally by the stack.
The ARP module cache manipulation access is meant for TCP/IP Stack control and configuration depending on the actual
network topology.
5.8.2.4.4.4 HTTP Changes
This topic discusses the changes made to the http.h file.
Note: This file was named http2.h in the V6 Beta TCP/IP Stack.
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Description
HTTP Changes
The TCP/IP Stack include header file, http.h, has been updated as follows.
All of the functions that the HTTP exposes as its API now take a first parameter, a HTTP connection handle, named
HTTP_CONN_HANDLE. This allows a cleaner and better behavior in both multi-threaded environments and in the situation where
we it may be desired to run multiple instances of the HTTP process itself, allowing for serving multiple independent connections.
For example, the HTTP functions now appear as:
• TCPIP_HTTP_FileInclude(HTTP_CONN_HANDLE connHandle, const uint8_t* cFile) ;
• HTTPExecuteGet(HTTP_CONN_HANDLE connHandle);
• HTTPExecutePost(HTTP_CONN_HANDLE connHandle);
• TCPIP_HTTP_CurrentConnectionFileGet(HTTP_CONN_HANDLE connHandle);
• TCPIP_HTTP_CurrentConnectionCallbackPosGet(HTTP_CONN_HANDLE connHandle);
Support has been added for the HTTP module client to store/retrieve its own connection related data. For example:
• TCPIP_HTTP_CurrentConnectionUserDataSet(HTTP_CONN_HANDLE connHandle, const void* uData);
• TCPIP_HTTP_CurrentConnectionUserDataGet(HTTP_CONN_HANDLE connHandle);
HTTP Print
Also, the functions exposed in http_print.h take the connection handle parameter. For example:
• HTTPPrint(HTTP_CONN_HANDLE connHandle, uint32_t callbackID);
• HTTPPrint_hellomsg(HTTP_CONN_HANDLE connHandle);
These changes affect all of the function calls in the file, custom_http_app.c, such as:
• HTTPExecuteGet(HTTP_CONN_HANDLE connHandle);
• HTTPExecutePost(HTTP_CONN_HANDLE connHandle);
To port an existing application, the extra parameter will have to be added. The connection handle is passed to the application as
part of the HTTP callback. The modifications should be minimal and possible using an editor without any other impact.
Please note that the MPFS2 generator tool (mpfs2.jar) has been updated to support the new HTTP API.
See the list of the complete API changes in http.h and http_print.h.
5.8.2.4.4.5 MPLAB Harmony TCP/IP Stack Storage Changes
This topic describes the storage changes in the MPLAB Harmony TCP/IP Stack.
Description
MPLAB Harmony TCP/IP Stack Storage Changes
The V5 TCP/IP Stack include header file, tcpip_storage.h, does not exist in the MPLAB Harmony TCP/IP Stack.
The TCP/IP Stack storage has become obsolete and is no longer maintained. This is mainly due to the way the dynamic
initialization of the stack is done in the V5 TCP/IP Stack:
• Each module has its own initialization data
• There are many parameters that could be relevant for an application and that may require storage besides the IP address, IP
Mask, or SSID, etc.
• The data is passed dynamically at the stack initialization. There is no more “build time” set of parameters against which to
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check at stack configuration (although support for a default configuration set at build time is present). The actual data contents
are the application responsibility.
• A system database service will be added that will use the File System. The database service will maintain configurations for
all the modules in the system, including the TCP/IP. The system database service API will be available to the applications as
well for storing/retrieving proprietary information.
• The parameter, TCPIP_STACK_USE_STORAGE, in the file, tcpip_config.h, should not be enabled. Future plans call for
this service to be removed from the distribution.
5.8.2.4.4.6 MPLAB Harmony TCP/IP Stack Configuration Changes
This topic describes the configuration changes in the MPLAB Harmony TCP/IP Stack.
Description
The stack configuration has a completely new structure. Each project has its own configuration folder that stores multiple
configurations based on CPU platforms and hardware boards.
Note: V5 TCP/IP Stack configuration files cannot be reused in the MPLAB Harmony TCP/IP Stack.
The following is a list of the most important features:
• system_config folder for projects – all profiles are stored in this location
• Multiple profiles per project, which are separated by CPU platform. The TCP/IP profile is usually common.
• tcpip_config.h – selects modules that are part of the build
• Each module has its own profile: arp_config.h, tcp_config.h, ssl_config.h, etc.
• BSP profiles per development board containing:
• hardware_config.h – the BSP specific hardware settings
• media_storage_config.h – storage media and partitioning settings
• sys_fs_config.h – file system configuration and settings
• mpfs_config.h – MPFS file system settings
• network_config.h – configuration for every network interface: NetBIOS names, default IP addresses, etc.
• system_config.h – system configuration (i.e, system tick, system console selection, system debug services, etc.)
5.8.2.4.4.6.1 MPLAB Harmony TCP/IP Stack Configuration
This topic provides information on the configuration of the MPLAB Harmony TCP/IP Stack.
Description
MPLAB Harmony TCP/IP Stack Configuration
The presented structure is simply a model and a different layout can be chosen. The only requirement is to use the proper path
in your project so that the necessary configuration files are found at build time.
For example, depending on your exact hardware platform or development board, a path similar to the following can be added to
your project path:
..\harmony\\apps\tcpip\tcpip_web_server_demo_app\firmware\src\system_config\pic32_eth_
sk_int_dyn\tcpip_profile
5.8.2.4.4.6.2 MPLAB Harmony TCP/IP Stack Heap Configuration
This topic provides information on the heap configuration of the MPLAB Harmony TCP/IP Stack.
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Description
MPLAB Harmony TCP/IP Stack Heap Configuration
The MPLAB Harmony TCP/IP Stack uses dynamic memory for both initialization and run time buffers. Therefore, there are two
requirements for a project containing the stack to work properly.
The first requirement is that the TCP/IP stack should be configured with enough heap space. The amount of heap used by the
stack is specified by the TCPIP_STACK_DRAM_SIZE parameter in the tcpip_config.h file.
The value of the required TCP/IP heap for a project is application dependent. Some of the most important factors that impact the
heap size are:
• Number of TCP sockets
• By default, each TCP socket requires 512 bytes for a RX buffer and 512 bytes for a TX buffer. These parameters can be
adjusted by modifying the values specified in tcp_config.h or dynamically through the TCPIP_TCP_OptionsSet()
function.
• Number of UDP sockets:
• For each UDP socket that needs to initiate a transmission, the IP layer will have to allocate the required space (suggested
by the functions, UDPv4IsTxPutReady or UDPv4IsTxPutReady
• Once the UDP buffering will be added, each socket will have its own RX and TX buffers. These parameters can be
adjusted by modifying the values specified in the file, udp_config.h, or dynamically through the
TCPIP_UDP_OptionsSet() function
• The type of Ethernet MAC that is used:
• The PIC32MX6XX/7XX devices with a built-in 100 Mbps Ethernet controller use system memory for buffering incoming RX
traffic. For sustained 100 Mbps operation, adequate RX buffer space must be provided. This parameter can be adjusted by
modifying the values specified in the file, network_config.h, using the array, TCPIP_HOSTS_CONFIGURATION[].
• If SSL is enabled, it will require additional buffering for encryption/decryption at run-time. The SSL module buffering
requirement is dependent on the RSA key length specified in ssl_config.h.
The second requirement is that the project that includes the MPLAB Harmony TCP/IP Stack must be built with sufficient heap
size to accommodate the stack (at a minimum, the project needs the TCPIP_STACK_DRAM_SIZE bytes of heap). This parameter
is adjusted on the Linker tab in the project properties.
In general, for a TCP/IP project running on a PIC32MX device with an embedded Ethernet controller, at least 8 KB of heap
space is needed by the stack. However, the following is implied:
• 100 Mbps traffic is not sustained
• No SSL
• Relatively few sockets
A typical value for comfortably handling 100 Mbps Ethernet traffic would be 40 KB of TCP/IP heap space.
The amount of the required heap is less for an external Ethernet MAC.
Keep in mind the following when assigning heap space:
• If there is not enough heap space the stack initialization may fail
• If there is not enough heap space some run time buffer allocation may fail and some packets transmission will have to be
deferred until a later time, thus impacting the stack performance
• It is always a good idea to have a reserve, at least an extra 2 KB of heap space above the total amount of space that is used
• A very useful tool in understanding the heap allocation and how the space is distributed among the stack modules is the
TCP/IP command processor
By enabling the parameter, TCPIP_STACK_DRAM_DEBUG_ENABLE, in the tcpip_config.h file, the stack will output debug
messages when it runs out of memory. Then, using the heapinfo command at the TCP/IP command processor prompt will
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return a snapshot of the current TCP/IP heap status and can help in early detection of problems.
Optionally, enabling the parameter, TCPIP_STACK_DRAM_TRACE_ENABLE in the tcpip_config.h file, will instruct the TCP/IP
heap allocation module to store trace information that will be displayed with the heapinfo command.
5.8.2.4.4.7 New MPLAB Harmony TCP/IP Stack API Functions
This topic describes some of the important new API functions in the MPLAB Harmony TCP/IP Stack.
Description
There are many new functions available that have been introduced to take advantage of new features, such as IPV6 and support
of multiple interfaces. However, there is no concern for the porting process regarding the new API calls as the previous stack
implementation did not support this kind of service.
A new API function should be added to the application only when the access to the new feature is needed.
Existent applications should port easily without using the new API.
For reference, the following are a few of the most important new API functions that could prove useful in the porting of your
application:
• Initialization of the stack network interfaces:
• TCPIP_STACK_NetUp()
• TCPIP_STACK_NetDown()
• Default interface selection:
• TCPIP_STACK_NetDefaultGet()
• TCPIP_STACK_NetDefaultSet()
• TCP/UDP multiple interface support:
• TCPIP_TCP_Bind()
• TCPIP_TCP_RemoteBind()
• TCPIP_TCP_SocketNetGet()
• TCPIP_TCP_SocketNetSet()
• TCPIP_UDPBind()
• TCPIP_UDP_RemoteBind()
• TCPIP_UDP_SocketNetGet()
• TCPIP_UDP_SocketNetSet()
Refer to the file, tcpip_manager.h, for a complete list of all new network interface APIs.
5.8.2.4.4.7.1 Main Program Changes
This topic describes the main program changes in the MPLAB Harmony TCP/IP Stack.
Description
Main Program Changes
There are few changes that the main program loop has to take care of. A full working example is given with the file,
main_demo.c, which is provided with the stack distribution.
The main program should call the following functions:
• SYS_Initialize() – This function is what initializes the system and runs the Board Support Package (BSP) specific code
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• SYS_Tasks() – This is the function that takes care of the system tasks and must be called periodically
• TCPIP_STACK_Task() – This is the TCP/IP stack tasks function that runs all of the state machines that are part of the
TCP/IP stack. This function must be called periodically. Please note the name change.
To gain access to a network interface the TCPIP_STACK_NetHandle(“iname”) function should be used. Examples are
provided in the previous section.
5.8.2.4.4.8 MPLAB Harmony TCP/IP Stack Initialization Changes
This topic describes the initialization updates to the MPLAB Harmony TCP/IP Stack.
Description
The TCP/IP Stack include header file, tcpip_manager.h, has been updated as follows.
To initialize the stack the call is now:
TCPIP_STACK_Initialize(const TCPIP_NETWORK_CONFIG* pNetConf, int nNets,
TCPIP_STACK_MODULE_CONFIG* pModConfig, int nModules);
Where:
• pNetConf – is a pointer to an array of configurations for all the initialized network interfaces
• nNets – is the number of the network interfaces that the stack is to support
• pModConfig – is a pointer to an table storing configuration data for the TCP/IP stack modules
• nModules – is the number of entries in this table, (i.e., the number of initialized modules)
The default TCP/IP stack configuration is provided with the stack distribution and consists of:
• network_config.h: TCPIP_HOSTS_CONFIGURATION[] – an array of TCPIP_NETWORK_CONFIG entries describing the
default configuration of each network interface
• tcpip_modules_config.h: TCPIP_STACK_MODULE_CONFIG_TBL[] – an array of TCPIP_STACK_MODULE_CONFIG
entries storing the default configuration data for each module of the TCP/IP stack. This is just an aggregate of all the default
configurations per module found in the module configuration header files, such as tcp_config.h, udp_config.h,
arp_config.h, and so on.
These tables are defined by default in the configuration files. See MPLAB Harmony TCP/IP Stack Configuration Changes for
details.
You can change the parameters of these structures as appropriate.
An example of the TCP/IP initialization is part of the distributed file, main_demo.c. This file is located in the following Windows®
path:
.\harmony\apps\tcpip\tcpip_web_server_demo_app\firmware\src
Note: The stack initialization may fail. The application code must check the result of this call to detect if the stack failed to
initialize properly.
5.8.2.4.4.9 MPLAB Harmony TCP/IP Stack Access Changes
This topic describes the stack access updates that were made to the MPLAB Harmony TCP/IP Stack.
Description
The TCP/IP Stack include header file, tcpip_manager.h, has been updated as follows.
Direct access to the internally maintained stack structures has been removed. To access the information for a specific network
interface a handle must be obtained using the interface name. For example:
TCPIP_NET_HANDLE hNet = TCPIP_STACK_NetHandleGet("PIC32INT");
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or
TCPIP_NET_HANDLE hNet = TCPIP_STACK_NetHandleGet(“MRF24W”);
Once a handle to the interface has been obtained, different parameters of that network interface can be queried and set. For
example:
• TCPIP_STACK_NetAddress(TCPIP_NET_HANDLE netH) – returns the network interface address
• TCPIP_STACK_NetAddressGateway(TCPIP_NET_HANDLE netH) – returns the interface gateway address
Refer to the tcpip_manager.h file for a complete list of functions.
Note: The TCPIP_NET_HANDLE is an opaque data type.
The well known names of the network interfaces are currently in the file, tcpip.h.
The exact header file that exposes the network interfaces names may change in the future; however, the names of the supported
network interfaces will be retained.
Use the file, network_config.h, as an example.
Refer to the file, main_demo.c, for an example of how to use the interface handle functions.
5.8.2.5 MPLAB Harmony TCP/IP Stack Utilities
This topic describes the MPLAB Harmony TPC/IP Stack utilities.
Description
The MPLAB Harmony TCP/IP Stack includes the following utilities:
• MPFS2 - The MPFS2 Java utility that assists the application in generating the MPFS image of the files needed by the Web
server has been updated. This utility supports both the V5 and MPLAB Harmony versions of the TCP/IP stack with improved
functionality. The V5 TCP/IP Stack utility can still be used; however, some minor adjustments may need to be done manually.
• TCP/IP Discoverer - The TCP/IP Discoverer Java utility has been updated to support not only the MPLAB Harmony TCP/IP
Stack, but also IPV6. This utility is up and running and is backward compatible with the V5 TCP/IP Stack.
• TCP/IP Configuration - The TCP/IP Configuration utility is currently not supported. The need of individually configuring TCP
and UDP sockets is no longer needed, as all sockets behave similarly and they are allocated dynamically as needed.
5.8.2.6 MPLAB Harmony TCP/IP Stack SSL/RSA Usage
This topic provides information regarding the usage of SSL and RSA.
Description
The SSL design has been updated to support multiple interfaces. The same is true for the RSA engine. However, the SSL
module does not currently use the Microchip Crypto Library. Until the proper Crypto Library support is added to SSL, the stack is
distributed with the RSA and RC4 code embedded into the stack.
In the future, the Crypto Library will be completely removed from the TCP/IP stack, and the stack will be just a client to the
Crypto Library.
5.8.2.7 Porting Applications from the V6 Beta TCP/IP Stack to the
MPLAB Harmony TCP/IP Stack
Porting an application from the V6 Beta TCP/IP Stack into the TCP/IP Stack within MPLAB Harmony consists of updating
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existing TCP/IP Stack function names in your application to the new MPLAB Harmony function names.
5.8.2.7.1 MPLAB Harmony TCP/IP Stack Function Name Compliance
This topic provides header file function mapping tables that show the V6 Beta TCP/IP Stack function name and the compliant
name within the MPLAB Harmony TCP/IP Stack.
Description
The replacement names chosen to make existing TCP/IP Stack functions compliant with MPLAB Harmony are shown in
individual tables per header file name.
The files listed in the tables are located in the following two MPLAB Harmony installation folders:
.\harmony\\framework\tcpip
.\harmony\\framework\tcpip\src
Each table shows the original and new names used. Note that other than name changes, no other modifications were made to
the middleware functions.
Header File: arp.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
ARP_ENTRY_QUERY TCPIP_ARP_ENTRY_QUERY
ARP_ENTRY_TYPE TCPIP_ARP_ENTRY_TYPE
ARP_EVENT_HANDLER TCPIP_ARP_EVENT_HANDLER
ARP_EVENT_TYPE TCPIP_ARP_EVENT_TYPE
ARP_HANDLE TCPIP_ARP_HANDLE
ARP_OPERATION_TYPE TCPIP_ARP_OPERATION_TYPE
ARP_RESULT TCPIP_ARP_RESULT
ARPCacheGetEntriesNo TCPIP_ARP_CacheEntriesNoGet
ARPCacheSetThreshold TCPIP_ARP_CacheThresholdSet
ARPEntryGet TCPIP_ARP_EntryGet
ARPEntryQuery TCPIP_ARP_EntryQuery
ARPEntryRemove TCPIP_ARP_EntryRemove
ARPEntryRemoveAll TCPIP_ARP_EntryRemoveAll
ARPEntryRemoveNet TCPIP_ARP_EntryRemoveNet
ARPEntrySet TCPIP_ARP_EntrySet
ARPDeRegisterHandler TCPIP_ARP_HandlerDeRegister
ARPIsResolved TCPIP_ARP_IsResolved
ARPProbe TCPIP_ARP_Probe
ARPRegisterHandler TCPIP_ARP_HandlerRegister
ARPResolve TCPIP_ARP_Resolve
ARPRegisterCallbacks TCPIP_ARP_CallbacksRegister
Header File: dhcp.h
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V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
DHCPDeRegisterHandler TCPIP_DHCP_HandlerDeRegister
DHCPRegisterHandler TCPIP_DHCP_HandlerRegister
DHCPSetRequestTimeout TCPIP_DHCP_RequestTimeoutSet
DHCP_EVENT_HANDLER TCPIP_DHCP_EVENT_HANDLER
DHCP_EVENT_TYPE TCPIP_DHCP_EVENT_TYPE
DHCP_HANDLE TCPIP_DHCP_HANDLE
DHCPDisable TCPIP_DHCP_Disable
DHCPEnable TCPIP_DHCP_Enable
DHCPIsBound TCPIP_DHCP_IsBound
DHCPIsEnabled TCPIP_DHCP_IsEnabled
DHCPIsServerDetected TCPIP_DHCP_IsServerDetected
Header File: dhcps.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
DHCPServerIsEnabled TCPIP_DHCPS_IsEnabled
DHCPServerLeaseEntryGet TCPIP_DHCPS_LeaseEntryGet
DCHPServerGetPoolEntries TCPIP_DHCPS_GetPoolEntries
DCHPServerRemovePoolEntries TCPIP_DHCPS_RemovePoolEntries
DHCPServerDisable TCPIP_DHCPS_Disable
DHCPServerEnable TCPIP_DHCPS_Enable
DHCPServerIsEnabled TCPIP_DHCPS_IsEnabled
Header File: ddns.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
DDNSForceUpdate TCPIP_DDNS_UpdateForce
DDNSSetService TCPIP_DDNS_ServiceSet
DDNSGetLastIP TCPIP_DDNS_LastIPGet
DDNSGetLastStatus TCPIP_DDNS_LastStatusGet
Header File: dns.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
DNSBeginUsage TCPIP_DNS_UsageBegin
DNSEndUsage TCPIP_DNS_UsageEnd
DNSResolve TCPIP_DNS_Resolve
DNSIsResolved TCPIP_DNS_IsResolved
Header File: http.h (formerly http2.h)
V6 Beta TCP/IP Stack Name (http2.h) MPLAB Harmony Compliant Name (http.h)
HTTPURLDecode TCPIP_HTTP_URLDecode
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HTTPGetArg TCPIP_HTTP_ArgGet
HTTPReadPostName TCPIP_HTTP_PostNameRead
HTTPReadPostValue TCPIP_HTTP_PostValueRead
HTTPIncFile TCPIP_HTTP_FileInclude
HTTPCurConnectionFileGet TCPIP_HTTP_CurrentConnectionFileGet
HTTPCurConnectionPostSmGet TCPIP_HTTP_CurrentConnectionPostSmGet
HTTPCurConnectionPostSmSet TCPIP_HTTP_CurrentConnectionPostSmSet
HTTPCurConnectionDataBufferGet TCPIP_HTTP_CurrentConnectionDataBufferGet
HTTPCurConnectionCallbackPosGet TCPIP_HTTP_CurrentConnectionCallbackPosGet
HTTPCurConnectionCallbackPosSet TCPIP_HTTP_CurrentConnectionCallbackPosSet
HTTPCurConnectionStatusSet TCPIP_HTTP_CurrentConnectionStatusSet
HTTPCurConnectionHasArgsSet TCPIP_HTTP_CurrentConnectionHasArgsSet
HTTPCurConnectionByteCountGet TCPIP_HTTP_CurrentConnectionByteCountGet
HTTPCurConnectionByteCountSet TCPIP_HTTP_CurrentConnectionByteCountSet
HTTPCurConnectionByteCountDec TCPIP_HTTP_CurrentConnectionByteCountDec
HTTPCurConnectionSocketGet TCPIP_HTTP_CurrentConnectionSocketGet
Header File: icmp.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
ICMPDeRegisterCallback TCPIP_ICMP_CallbackDeregister
ICMPRegisterCallback TCPIP_ICMP_CallbackRegister
ICMPSendEchoRequest TCPIP_ICMP_EchoRequestSend
Header File: icmpv6.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
TCPIP_ICMPV6_DeRegisterCallback TCPIP_ICMPV6_CallbackDeregister
TCPIP_ICMPV6_PutHeaderEchoRequest TCPIP_ICMPV6_HeaderEchoRequestPut
TCPIP_ICMPV6_RegisterCallback TCPIP_ICMPV6_CallbackRegister
TCPIP_IPV6_GetDestAddress TCPIP_IPV6_AddressDestGet
TCPIP_IPV6_GetSourceAddress TCPIP_IPV6_AddressSourceGet
TCPIP_IPV6_SetDestAddress TCPIP_IPV6_AddressDestSet
TCPIP_IPV6_SetSourceAddress TCPIP_IPV6_AddressSourceSet
TCPIP_IPV6_DAS_SelectSourceAddress TCPIP_IPV6_DAS_AddressSourceSelect
TCPIP_IPV6_AddUnicastAddress TCPIP_IPV6_AddressUnicastAdd
TCPIP_IPV6_RemoveUnicastAddress TCPIP_IPV6_AddressUnicastRemove
TCPIP_IPV6_AddMulticastListener TCPIP_IPV6_MulticastListenerAdd
TCPIP_IPV6_RemoveMulticastListener TCPIP_IPV6_MulticastListenerRemove
TCPIP_IPV6_RegisterHandler TCPIP_IPV6_HandlerRegister
TCPIP_IPV6_DeRegisterHandler TCPIP_IPV6_HandlerDeRegister
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Header File: ipv6.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
TCPIP_IPV6_InterfaceIsReady Not Applicable
TCPIP_IPV6_Put Not Applicable
TCPIP_IPV6_AddressIsSolicitedNodeMulticast Not Applicable
TCPIP_IPV6_Flush Not Applicable
TCPIP_IPV6_PutArrayHelper TCPIP_IPV6_ArrayPutHelper
TCPIP_IPV6_DAS_SelectSourceAddress TCPIP_IPV6_DASSourceAddressSelect
TCPIP_IPV6_GetDestAddress TCPIP_IPV6_DestAddressGet
TCPIP_IPV6_SetDestAddress TCPIP_IPV6_DestAddressSet
TCPIP_IPV6_DeRegisterHandler TCPIP_IPV6_HandlerDeregister
TCPIP_IPV6_RegisterHandler TCPIP_IPV6_HandlerRegister
TCPIP_IPV6_AddMulticastListener TCPIP_IPV6_MulticastListenerAdd
IPv6RemoveMulticastListener TCPIP_IPV6_MulticastListenerRemove
TCPIP_IPV6_FreePacket TCPIP_IPV6_PacketFree
TCPIP_IPV6_SetPayload TCPIP_IPV6_PayloadSet
TCPIP_IPV6_GetSourceAddress TCPIP_IPV6_SourceAddressGet
TCPIP_IPV6_SetSourceAddress TCPIP_IPV6_SourceAddressSet
TCPIP_IPV6_IsTxPutReady TCPIP_IPV6_TxIsPutReady
TCPIP_IPV6_AllocateTxPacket TCPIP_IPV6_TxPacketAllocate
TCPIP_IPV6_AddUnicastAddress TCPIP_IPV6_UnicastAddressAdd
TCPIP_IPV6_GetArray TCPIP_IPV6_ArrayGet
IPv6RemoveUnicastAddress TCPIP_IPV6_UnicastAddressRemove
Header File: ndp.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
TCPIP_NDP_NeighborConfirmReachability TCPIP_NDP_NborReachConfirm
Header File: smtp.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
SMTPPutArray TCPIP_SMTP_ArrayPut
SMTPFlush TCPIP_SMTP_Flush
SMTPIsBusy TCPIP_SMTP_IsBusy
SMTPIsPutReady TCPIP_SMTP_IsPutReady
SMTPSendMail TCPIP_SMTP_MailSend
SMTPPut TCPIP_SMTP_Put
SMTPPutDone TCPIP_SMTP_PutIsDone
SMTPPutString TCPIP_SMTP_StringPut
SMTPBeginUsage TCPIP_SMTP_UsageBegin
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SMTPEndUsage TCPIP_SMTP_UsageEnd
Header File: snmp.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
SNMPNotify TCPIP_SNMP_Notify
SNMPIsNotifyReady TCPIP_SNMP_NotifyIsReady
SNMPNotifyPrepare TCPIP_SNMP_NotifyPrepare
SNMPGetPktProcessingDynMemStubPtrs TCPIP_SNMP_PacketProcStubPtrsGet
SNMPGetProcessBuffData TCPIP_SNMP_ProcessBufferDataGet
SNMPPutDataToProcessBuff TCPIP_SNMP_DataCopyToProcessBuffer
SNMPRetrieveReadCommunity TCPIP_SNMP_ReadCommunityGet
SNMPGetTrapTime TCPIP_SNMP_TrapTimeGet
SNMPUdpClientGetNet TCPIP_SNMP_ClientGetNet
SNMPRetrieveWriteCommunity TCPIP_SNMP_WriteCommunityGet
Header File: sntp.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
SNTPGetUTCSeconds TCPIP_SNTP_UTCSecondsGet
Header File: tcpip_manager.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
TCPIP_STACK_SetNetAddress TCPIP_STACK_NetAddressSet
TCPIP_STACK_SetNetGatewayAddress TCPIP_STACK_NetAddressGatewaySet
TCPIP_STACK_SetNetPriDNSAddress TCPIP_STACK_NetAddressDnsPrimarySet
TCPIP_STACK_SetNetSecondDNSAddress TCPIP_STACK_NetAddressDnsSecondSet
TCPIP_STACK_SetNetMask TCPIP_STACK_NetMaskSet
TCPIP_STACK_SetNetMacAddress TCPIP_STACK_NetAddressMacSet
TCPIP_STACK_NetGatewayAddress TCPIP_STACK_NetAddressGateway
TCPIP_STACK_NetPriDNSAddress TCPIP_STACK_NetAddressDnsPrimary
TCPIP_STACK_NetSecondDNSAddress TCPIP_STACK_NetAddressDnsSecond
TCPIP_STACK_NetMacAddress TCPIP_STACK_NetAddressMac
TCPIP_STACK_NetBcastAddress TCPIP_STACK_NetAddressBcast
TCPIP_STACK_SetNetBIOSName TCPIP_STACK_NetBiosNameSet
TCPIP_STACK_GetDefaultNet TCPIP_STACK_NetDefaultGet
TCPIP_STACK_SetDefaultNet TCPIP_STACK_NetDefaultSet
TCPIP_STACK_IsNetLinked TCPIP_STACK_NetIsLinked
TCPIP_STACK_CreateNetInfo TCPIP_STACK_NetInfoCreate
TCPIP_STACK_IsNetUp TCPIP_STACK_NetIsUp
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Header File: tcp.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
TCPIsGetReady TCPIP_TCP_GetIsReady
TCPGetArray TCPIP_TCP_ArrayGet
TCPPeek TCPIP_TCP_Peek
TCPPeekArray TCPIP_TCP_ArrayPeek
TCPGetRxFIFOFree TCPIP_TCP_FifoRxFreeGet
TCPGetTxFIFOFull TCPIP_TCP_FifoTxFullGet
TCPDiscard TCPIP_TCP_Discard
TCPGet TCPIP_TCP_Get
TCPFind TCPIP_TCP_Find
TCPFindArray TCPIP_TCP_ArrayFind
TCPAdjustFIFOSize TCPIP_TCP_FifoSizeAdjust
TCPOpenServer TCPIP_TCP_ServerOpen
TCPOpenClient TCPIP_TCP_ClientOpen
TCPBind TCPIP_TCP_Bind
TCPRemoteBind TCPIP_TCP_RemoteBind
TCPSetOptions TCPIP_TCP_OptionsSet
TCPGetOptions TCPIP_TCP_OptionsGet
TCPIsConnected TCPIP_TCP_IsConnected
TCPWasReset TCPIP_TCP_WasReset
TCPDisconnect TCPIP_TCP_Disconnect
TCPClose TCPIP_TCP_Close
TCPGetSocketInfo TCPIP_TCP_SocketInfoGet
TCPSocketSetNet TCPIP_TCP_SocketNetSet
TCPSocketGetNet TCPIP_TCP_SocketNetGet
TCPIsPutReady TCPIP_TCP_PutIsReady
TCPPut TCPIP_TCP_Put
TCPPutArray TCPIP_TCP_ArrayPut
TCPPutString TCPIP_TCP_StringPut
TCPFlush TCPIP_TCP_Flush
TCPGetRxFIFOFull TCPIP_TCP_FifoRxFullGet
TCPGetTxFIFOFree TCPIP_TCP_FifoTxFreeGet
TCPAbort TCPIP_TCP_Abort
TCPAddSSLListener TCPIP_TCPSSL_ListenerAdd
TCPIsSSL TCPIP_TCP_SocketIsSecuredBySSL
TCPSetDestinationIPAddress TCPIP_TCP_DestinationIPAddressSet
TCPSetSourceIPAddress TCPIP_TCP_SourceIPAddressSet
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TCPSSLIsHandshaking TCPIP_TCPSSL_StillHandshaking
TCpSSLMessageTransmit TCPIP_TCPSSL_MessageTransmit
TCPSSLPutRecordHeader TCPIP_TCPSSL_RecordHeaderPut
TCPStartSSLClient TCPIP_TCPSSL_ClientStart
TCPStartSSLClientEx TCPIP_TCPSSL_ClientBegin
TCPStartSSLServer TCPIP_TCPSSL_ServerStart
Header File: tcpip_events.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
TCPIP_STACK_GetPendingEvents TCPIP_STACK_EventsPendingGet
TCPIP_STACK_RegisterHandler TCPIP_STACK_HandlerRegister
TCPIP_STACK_DeRegisterHandler TCPIP_STACK_HandlerDeregister
Header File: ipv4.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
TCPIP_IPV4_GetArray TCPIP_IPV4_ArrayGet
TCPIP_IPV4_PutArray TCPIP_IPV4_ArrayPut
TCPIP_IPV4_PutArrayHelper TCPIP_IPV4_ArrayPutHelper
TCPIP_IPV4_GetDestAddress TCPIP_IPV4_DestAddressGet
TCPIP_IPV4_SetDestAddress TCPIP_IPV4_DestAddressSet
TCPIP_IPV4_FreePacket TCPIP_IPV4_PacketFree
TCPIP_IPV4_SetPayload TCPIP_IPV4_PayloadSet
TCPIP_IPV4_GetSourceAddress TCPIP_IPV4_SourceAddressGet
TCPIP_IPV4_SetSourceAddress TCPIP_IPV4_SourceAddressSet
TCPIP_IPV4_IsTxPutReady TCPIP_IPV4_TxIsPutReady
TCPIP_IPV4_IsTxReady TCPIP_IPV4_TxIsReady
TCPIP_IPV4_AllocateTxPacket TCPIP_IPV4_TxPacketAllocate
Header File: udp.h
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
UDPIsGetReady TCPIP_UDP_GetIsReady
UDPSetRxOffset TCPIP_UDP_RxOffsetSet
UDPGetArray TCPIP_UDP_ArrayGet
UDPDiscard TCPIP_UDP_Discard
UDPGet TCPIP_UDP_Get
UDPOpenServer TCPIP_UDP_ServerOpen
UDPOpenClient TCPIP_UDP_ClientOpen
UDPBind TCPIP_UDP_Bind
UDPRemoteBind TCPIP_UDP_RemoteBind
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UDPSetOptions TCPIP_UDP_OptionsSet
UDPGetOptions TCPIP_UDP_OptionsGet
UDPIsConnected TCPIP_UDP_IsConnected
UDPIsOpened TCPIP_UDP_IsOpened
UDPClose TCPIP_UDP_Close
UDPGetSocketInfo TCPIP_UDP_SocketInfoGet
UDPSocketSetNet TCPIP_UDP_SocketNetSet
UDPSocketGetNet TCPIP_UDP_SocketNetGet
UDPSetTxOffset TCPIP_UDP_TxOffsetSet
UDPIsTxPutReady TCPIP_UDP_TxPutIsReady
UDPPutArray TCPIP_UDP_ArrayPut
UDPPutString TCPIP_UDP_StringPut
UDPGetTxCount TCPIP_UDP_TxCountGet
UDPFlush TCPIP_UDP_Flush
UDPPut TCPIP_UDP_Put
UDPSetBcastIPV4Address TCPIP_UDP_BcastIPV4AddressSet
UDPSetSourceIPAddress TCPIP_UDP_SourceIPAddressSet
UDPSetDestinationIPAddress TCPIP_UDP_DestinationIPAddressSet
5.8.2.7.2 Development Information (Advance Information)
This advance information is specifically provided to assist MPLAB Harmony driver development for porting the existing Ethernet
Controller Library and MAC/PHY drivers to the new platform.
5.8.2.7.2.1 Porting the MPLAB Harmony Drivers and Peripheral Library
Note: This information is considered to be Advance Information.
This topic provides function mapping tables that show the V6 Beta TCP/IP Stack function name and the compliant name within
the MPLAB Harmony TCP/IP Stack for the purpose of porting to the MPLAB Harmony Ethernet Drivers and Ethernet Peripheral
Library.
Description
Note: This information is considered to be Advance Information.
Porting the MPLAB Harmony Ethernet Drivers and the MPLAB Harmony Ethernet Peripheral Library involves replacing the
Ethernet Controller Library with calls to MPLAB Harmony equivalents. This information is listed in Table 1. Please note that
function arguments were modified in some instances.
To understand how a function of the Ethernet Controller Library is different from its equivalent MPLAB Harmony function, the
header of the MPLAB Harmony function should be examined. The MPLAB Harmony function header always lists the Ethernet
Controller Library function(s) that the new MPLAB Harmony function replaces, including the arguments of the old function.
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Table 1: TCP/IP Stack Function Mapping
Ethernet Controller Peripheral Library Name MPLAB Harmony Name
EthDescriptorGetBuffer
EthDescriptorsPoolAdd
EthDescriptorsPoolCleanUp
EthDescriptorsPoolRemove
EthEventsClr
EthEventsEnableClr
EthEventsEnableGet
EthEventsEnableSet
EthEventsEnableWrite
EthEventsGet
EthInit
EthMACGetAddress
EthMACOpen
EthMACSetAddress
EthMACSetMaxFrame
EthRxAcknowledgeBuffer
EthRxAcknowledgePacket
EthRxBuffersAppend
EthRxFiltersClr
EthRxFiltersHTSet
EthRxFiltersPMClr
EthRxFiltersPMSet
EthRxFiltersSet
EthRxFiltersWrite
EthRxGetBuffer
EthRxGetPacket
EthRxSetBufferSize
EthStatRxAlgnErrCnt
EthStatRxFcsErrCnt
EthStatRxOkCnt
EthStatRxOvflCnt
EthStatTxMColCnt
EthStatTxOkCnt
EthStatTxSColCnt
EthTxAcknowledgeBuffer
EthTxAcknowledgePacket
EthTxGetBufferStatus
EthTxGetPacketStatus
EthTxSendBuffer
EthTxSendPacket
DRV_ETHMAC_LegacyDescriptorGetBuffer
DRV_ETHMAC_LegacyDescriptorsPoolAdd
DRV_ETHMAC_LegacyDescriptorsPoolCleanUp
DRV_ETHMAC_LegacyDescriptorsPoolRemove
PLIB_ETH_EventsClr
PLIB_ETH_EventsEnableClr
PLIB_ETH_EventsEnableGet
PLIB_ETH_EventsEnableSet
PLIB_ETH_EventsEnableWrite
PLIB_ETH_EventsGet
DRV_ETHMAC_LegacyInit
PLIB_ETH_MACGetAddress
DRV_ETHMAC_LegacyMACOpen
PLIB_ETH_MACSetAddress
PLIB_ETH_MACSetMaxFrame
DRV_ETHMAC_LegacyRxAcknowledgeBuffer
DRV_ETHMAC_LegacyRxAcknowledgePacket
DRV_ETHMAC_LegacyRxBuffersAppend
PLIB_ETH_RxFiltersClr
PLIB_ETH_RxFiltersHTSet
PLIB_ETH_RxFiltersPMClr
PLIB_ETH_RxFiltersPMSet
PLIB_ETH_RxFiltersSet
PLIB_ETH_RxFiltersWrite
DRV_ETHMAC_LegacyRxGetBuffer
DRV_ETHMAC_LegacyRxGetPacket
PLIB_ETH_RxSetBufferSize
PLIB_ETH_StatRxAlgnErrCnt
PLIB_ETH_StatRxFcsErrCnt
PLIB_ETH_StatRxOkCnt
PLIB_ETH_StatRxOvflCnt
PLIB_ETH_StatTxMColCnt
PLIB_ETH_StatTxOkCnt
PLIB_ETH_StatTxSColCnt
DRV_ETHMAC_LegacyTxAcknowledgeBuffer
DRV_ETHMAC_LegacyTxAcknowledgePacket
DRV_ETHMAC_LegacyTxGetBufferStatus
DRV_ETHMAC_LegacyTxGetPacketStatus
DRV_ETHMAC_LegacyTxSendBuffer
DRV_ETHMAC_LegacyTxSendPacket
Table 2 shows the MPLAB Harmony Ethernet Controller Peripheral Library equivalents for functions in the MPLAB Harmony
Ethernet MAC Driver and the MPLAB Harmony Ethernet PHY Driver.
The Ethernet Controller Library files are located in the following Windows® installation path:
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C:\Program Files\Microchip\xc32\\pic32-libs\peripheral\eth\source
Table 2: Ethernet Controller Peripheral Library Function Mapping
Ethernet Controller Peripheral Library Name MPLAB Harmony Ethernet MAC Driver Name
EthClose
EthDescriptorGetBuffer
EthDescriptorsPoolAdd
EthDescriptorsPoolCleanUp
EthDescriptorsPoolRemove
EthInit
EthMACOpen
EthRxAcknowledgeBuffer
EthRxAcknowledgePacket
EthRxBuffersAppend
EthRxGetBuffer
EthRxGetPacket
EthTxAcknowledgeBuffer
EthTxAcknowledgePacket
EthTxGetBufferStatus
EthTxGetPacketStatus
EthTxSendBuffer
EthTxSendPacket
DRV_ETHMAC_LegacyClose
DRV_ETHMAC_LegacyDescriptorGetBuffer
DRV_ETHMAC_LegacyDescriptorsPoolAdd
DRV_ETHMAC_LegacyDescriptorsPoolCleanUp
DRV_ETHMAC_LegacyDescriptorsPoolRemove
DRV_ETHMAC_LegacyInit
DRV_ETHMAC_LegacyMACOpen
DRV_ETHMAC_LegacyRxAcknowledgeBuffer
DRV_ETHMAC_LegacyRxAcknowledgePacket
DRV_ETHMAC_LegacyRxBuffersAppend
DRV_ETHMAC_LegacyRxGetBuffer
DRV_ETHMAC_LegacyRxGetPacket
DRV_ETHMAC_LegacyTxAcknowledgeBuffer
DRV_ETHMAC_LegacyTxAcknowledgePacket
DRV_ETHMAC_LegacyTxGetBufferStatus
DRV_ETHMAC_LegacyTxGetPacketStatus
DRV_ETHMAC_LegacyTxSendBuffer
DRV_ETHMAC_LegacyTxSendPacket
Ethernet Controller Peripheral Library Name MPLAB Harmony Ethernet Peripheral Library Name
EthEventsEnableClr
EthEventsEnableGet
EthEventsEnableSet
EthEventsEnableWrite
EthEventsGet
EthMACGetAddress
EthMACSetAddress
EthMACSetMaxFrame
EthRxFiltersClr
EthRxFiltersHTSet
EthRxFiltersPMClr
EthRxFiltersPMSet
EthRxFiltersSet
EthRxFiltersWrite
EthRxSetBufferSize
EthStatRxAlgnErrCnt
EthStatRxFcsErrCnt
EthStatRxOkCnt
EthStatRxOvflCnt
EthStatTxMColCnt
EthStatTxOkCnt
EthStatTxSColCnt
PLIB_ETH_EventsEnableClr
PLIB_ETH_EventsEnableGet
PLIB_ETH_EventsEnableSet
PLIB_ETH_EventsEnableWrite
PLIB_ETH_EventsGet
PLIB_ETH_MACGetAddress
PLIB_ETH_MACSetAddress
PLIB_ETH_MACSetMaxFrame
PLIB_ETH_RxFiltersClr
PLIB_ETH_RxFiltersHTSet
PLIB_ETH_RxFiltersPMClr
PLIB_ETH_RxFiltersPMSet
PLIB_ETH_RxFiltersSet
PLIB_ETH_RxFiltersWrite
PLIB_ETH_RxSetBufferSize
PLIB_ETH_StatRxAlgnErrCnt
PLIB_ETH_StatRxFcsErrCnt
PLIB_ETH_StatRxOkCnt
PLIB_ETH_StatRxOvflCnt
PLIB_ETH_StatTxMColCnt
PLIB_ETH_StatTxOkCnt
PLIB_ETH_StatTxSColCnt
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Table 3 shows the existing and new function names for the TCP/IP MAC driver.
Please note that the following v6 Beta TCP/IP Stack files are now obsolete:
• eth_pic32_ext_phy.c
• eth_pic32_ext_phy_*.c
• eth_pic32_int_mac.c
• mac_events_pic32.c
Table 3: TCP/IP MAC Driver (tcpip_mac.h) – V6 Beta TCP/IP Stack to MPLAB Harmony TCP/IP Stack Conversion
V6 Beta TCP/IP Stack Name MPLAB Harmony Compliant Name
MAC_ADDR TCPIP_MAC_ADDR
MAC_ETHERNET_HEADER TCPIP_MAC_ETHERNET_HEADER
MAC_NOTIFY_HANDLER TCPIP_MAC_NOTIFY_HANDLER
MAC_PACKET TCPIP_MAC_PACKET
MAC_RX_PKT_STAT TCPIP_MAC_RX_PKT_STAT
MACEventAck TCPIP_MAC_EventAck
MACEventClearNotifyEvents TCPIP_MAC_EventNotifyClear
MACEventGetPending TCPIP_MAC_EventPendingEventsGet
MACEventSetNotifyEvents TCPIP_MAC_EventNotifyEventsSet
MACEventSetNotifyHandler TCPIP_MAC_EventNotifyHandlerSet
MACFCEnable TCPIP_MAC_FlowControlEnable
MACFCSetPauseValue TCPIP_MAC_FlowControlPauseValueSet
MACFCSetRxWMark TCPIP_MAC_FlowControlRxWMarkSet
TCPIP_MAC_FC_TYPE TCPIP_MAC_FLOWCONTROLTYPE
MACCheckLink TCPIP_MAC_LinkCheck
MACCalcIPBufferChecksum TCPIP_MAC_ChecksumIPBufferCalc
MACCalcRxChecksum TCPIP_MAC_ChecksumRxCalc
MACConnect TCPIP_MAC_Connect
MACPowerDown TCPIP_MAC_PowerDown
MACPowerUp TCPIP_MAC_PowerUp
MACGetHeader TCPIP_MAC_HeaderGet
MACDiscardRx TCPIP_MAC_RxDiscard
MACGet TCPIP_MAC_Get
MACGetArray TCPIP_MAC_ArrayGet
MACGetReadPtrInRx TCPIP_MAC_RxReadPtrGet
MACGetRxSize TCPIP_MAC_RxSizeGet
MACSetBaseReadPtr TCPIP_MAC_ReadPtrBaseSet
MACSetReadPtr TCPIP_MAC_ReadPtrSet
MACSetReadPtrInRx TCPIP_MAC_RxReadPtrSet
MACIsRxReady TCPIP_MAC_RxIsReady
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MACRxAcknowledge TCPIP_MAC_RxAcknowledge
MACRxGetPacket TCPIP_MAC_RxPacketGet
MACRxProfile TCPIP_MAC_RxProfile
MACRxRegisterNotifyHandler TCPIP_MAC_RxNotifyHandlerRegister
MACRxFilterOperation TCPIP_MAC_RxFilterOperation
MACRxFilterPatternMode TCPIP_MAC_RxFilterPatternMode
MACRxFilterSetHashTableEntry TCPIP_MAC_RxFilterHashTableEntrySet
MACTxPacket TCPIP_MAC_TxPacket
MACTxProfile TCPIP_MAC_TxProfile
MACTxRegisterNotifyHandler TCPIP_MAC_TxNotifyHandlerRegister
MACIsTxReady TCPIP_MAC_TxIsReady
MACFlush TCPIP_MAC_Flush
MACGetSslBaseAddr TCPIP_MAC_SslBaseAddrGet
MACGetTxBaseAddr TCPIP_MAC_TxBaseAddrGet
MACGetTxBuffSize TCPIP_MAC_TxBuffSizeGet
MACPut TCPIP_MAC_Put
MACPutArray TCPIP_MAC_ArrayPut
MACPutHeader TCPIP_MAC_HeaderPut
MACSetWritePtr TCPIP_MAC_WritePtrSet
5.8.3 Announce TCP/IP Stack Library
5.8.3.1 Introduction
Announce TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the Announce TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
This module will facilitate device discovery on DHCP enabled networks by broadcasting a UDP message on port 30303
whenever the local IP address changes.
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5.8.3.2 Release Notes
MPLAB Harmony Version: v0.70b Announce TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.3.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.3.4 Using the Library
This topic describes the basic architecture of the Announce TCPIP Stack Library and provides information and examples on how
to use it.
Interface Header File: tcpip_announce_config.h
The interface to the Announce TCPIP Stack library is defined in the "tcpip_announce_config.h" header file. This file is included
by the "tcpip.h" file. Any C language source (.c) file that uses the Announce TCPIP Stack library should include "tcpip.h".
Library File:
The Announce TCPIP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCPIP Stack interacts with the framework.
5.8.3.4.1 Abstraction Model
This library provides the API of the Announce TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
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Description
Announce Software Abstraction Block Diagram
Note: This diagram was not available at time of release and will included in a future release of MPLAB Harmony.
5.8.3.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Announce module.
Library Interface Section Description
Functions Routines for Configuring DHCP
Data Types and Constants This section provides various definitions describing This API
5.8.3.5 Configuring the Library
Macros
Name Description
ANNOUNCE_MAX_PAYLOAD Maximum size of a payload sent once
ANNOUNCE_PORT The announce port
Description
The configuration of the Announce TCP/IP Stack Library is based on the file tcpip_config.h
This header file contains the configuration selection for the Announce TCP/IP Stack Library. Based on the selections made, the
Announce TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all
instances of the AnnounceTCP/IP Stack Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.3.5.1 ANNOUNCE_MAX_PAYLOAD Macro
C
#define ANNOUNCE_MAX_PAYLOAD (512)
Description
Maximum size of a payload sent once
5.8.3.5.2 ANNOUNCE_PORT Macro
C
#define ANNOUNCE_PORT 30303
Description
The announce port
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5.8.3.6 Building the Library
This section list the files that are available in the \src of the Announce driver. It lists which files need to be included in the build
based on either a hardware feature present on the board or configuration option selected by the system.
5.8.3.7 Library Interface
Data Types and Constants
Name Description
TCPIP_ANNOUNCE_MODULE_CONFIG Announce layer configuration/initialization
Functions
Name Description
TCPIP_ANNOUNCE_DeInit This is function TCPIP_ANNOUNCE_DeInit.
TCPIP_ANNOUNCE_Init manager
TCPIP_ANNOUNCE_Send This is function TCPIP_ANNOUNCE_Send.
TCPIP_ANNOUNCE_Task This is function TCPIP_ANNOUNCE_Task.
TCPIP_ANNOUNCE_TaskPending This is function TCPIP_ANNOUNCE_TaskPending.
Description
This section describes the Application Programming Interface (API) functions of the Announce TCP/IP Stack.
Refer to each section for a detailed description.
5.8.3.7.1 Functions
5.8.3.7.1.1 TCPIP_ANNOUNCE_DeInit Function
C
void TCPIP_ANNOUNCE_DeInit(
const TCPIP_STACK_MODULE_CTRL* const stackData
);
Description
This is function TCPIP_ANNOUNCE_DeInit.
5.8.3.7.1.2 TCPIP_ANNOUNCE_Init Function
C
bool TCPIP_ANNOUNCE_Init(
const TCPIP_STACK_MODULE_CTRL* const stackData,
const TCPIP_ANNOUNCE_MODULE_CONFIG* announceData
);
Description
manager
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5.8.3.7.1.3 TCPIP_ANNOUNCE_Send Function
C
void TCPIP_ANNOUNCE_Send();
Description
This is function TCPIP_ANNOUNCE_Send.
5.8.3.7.1.4 TCPIP_ANNOUNCE_Task Function
C
bool TCPIP_ANNOUNCE_Task(
TCPIP_NET_IF * pNetIf
);
Description
This is function TCPIP_ANNOUNCE_Task.
5.8.3.7.1.5 TCPIP_ANNOUNCE_TaskPending Function
C
bool TCPIP_ANNOUNCE_TaskPending();
Description
This is function TCPIP_ANNOUNCE_TaskPending.
5.8.3.7.2 Data Types and Constants
5.8.3.7.2.1 TCPIP_ANNOUNCE_MODULE_CONFIG Structure
C
typedef struct {
} TCPIP_ANNOUNCE_MODULE_CONFIG;
Description
Announce layer configuration/initialization
5.8.3.8 Files
Files
Name Description
tcpip_announce_config.h Announce configuration file
tcpip_announce_manager.h
Description
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5.8.3.8.1 tcpip_announce_config.h
Announce Configuration file
This file contains the Announce module configuration options
Macros
Name Description
ANNOUNCE_MAX_PAYLOAD Maximum size of a payload sent once
ANNOUNCE_PORT The announce port
5.8.3.8.2 tcpip_announce_manager.h
TCPIP Announce Manager Header
Functions
Name Description
TCPIP_ANNOUNCE_DeInit This is function TCPIP_ANNOUNCE_DeInit.
TCPIP_ANNOUNCE_Init manager
TCPIP_ANNOUNCE_Send This is function TCPIP_ANNOUNCE_Send.
TCPIP_ANNOUNCE_Task This is function TCPIP_ANNOUNCE_Task.
TCPIP_ANNOUNCE_TaskPending This is function TCPIP_ANNOUNCE_TaskPending.
Structures
Name Description
TCPIP_ANNOUNCE_MODULE_CONFIG Announce layer configuration/initialization
5.8.4 ARP TCP/IP Stack Library
5.8.4.1 Introduction
Address Resolution Protocol (ARP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the ARP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The Address Resolution Protocol, or ARP, is a foundation layer of TCP/IP. It translates IP addresses to physical MAC
addresses, or locates a gateway through which a machine may be located.
TCP and UDP applications will not need to access ARP directly. The TCPOpen and UDPOpen functions will handle both ARP
and DNS operations transparently.
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Responses to incoming ARP requests are processed automatically. Resolution of ARP requests follows a simple state machine,
as indicated in the following diagram.
5.8.4.2 Release Notes
MPLAB Harmony Version: v0.70b ARP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.4.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.4.4 Using the Library
This topic describes the basic architecture of the ARP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: arp.h
The interface to the arp TCP/IP Stack library is defined in the "arp.h" header file. This file is included by the "tcpip.h" file. Any C
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language source (.c) file that uses the ARP TCP/IP Stack library should include "tcpip.h".
Library File:
The ARP TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.4.4.1 Abstraction Model
This library provides the API of the ARP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
ARP Software Abstraction Block Diagram
This module provides software abstraction of the ARP module existent in any TCP/IP Stack implementation. It removes the
overhead of address resolution from all other modules in the stack.
ARP Resolution Process
5.8.4.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the ARP module.
Library Interface Section Description
General Functions Functions used by the ARP library interface.
Cache Manipulation Functions This section provides an interface to the internal data storage (cache) that
the ARP module implements.
Data Types and Constants Derived types and enumerations used by the ARP library interface.
5.8.4.4.3 How the Library Works
The ARP module provides address resolution capabilities for the TCP/IP stack.
The ARP module is an independent module that maintains its state across calls and updates its state machine. A data storage
(cache) is maintained and updated internally for each interface existent in the system. The number of entries in each cache is
configurable at initialization time.
The ARP state machine can remove entries from the cache and can provide signals when a specific entry has been resolved or
has timed out. The purging of the cache is done internally base on a time-out parameter that is dynamically configurable.
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The module provides a notification mechanism which simplifies the design of the ARP clients. The most important client of the
ARP module is the IPv4 layer.
5.8.4.5 Configuring the Library
Macros
Name Description
ARP_CACHE_ENTRIES_97J60 This is macro ARP_CACHE_ENTRIES_97J60.
ARP_CACHE_ENTRIES_DEFAULT number of entries in the cache default number of entries per interface
ARP_CACHE_ENTRIES_ENCJ60 This is macro ARP_CACHE_ENTRIES_ENCJ60.
ARP_CACHE_ENTRIES_ENCJ600 This is macro ARP_CACHE_ENTRIES_ENCJ600.
ARP_CACHE_ENTRIES_MRF24W This is macro ARP_CACHE_ENTRIES_MRF24W.
ARP_CACHE_ENTRIES_PIC32INT specific interaces numbers
ARP_CACHE_PENDING_ENTRY_TMO timeout for a pending to be solved entry in the cache, in seconds the
entry will be removed if the tmo elapsed and the entry has not been
solved a solved entry moves to the solved entries timeout
ARP_CACHE_PENDING_RETRY_TMO timeout for resending an ARP request for a pending entry In order to
prevent the ARP flooding the standard recommends it to be greater than
1 sec. Of course, it should be less than
ARP_CACHE_PENDING_ENTRY_TMO
ARP_CACHE_PERMANENT_QUOTA max percentage of permanent entries in the cache note that since
permanent entries cannot be removed they tend to degrade the efficiency
of the cache look up
ARP_CACHE_PURGE_QUANTA how many entries to delete, once the threshold is reached
ARP_CACHE_PURGE_THRESHOLD default purge threshold, percentage once the number of resolved entries
in the cache gets beyond the threshold some resolved entries will be
purged
ARP_CACHE_SOLVED_ENTRY_TMO timeout for a solved entry in the cache, in seconds the entry will be
removed if the tmo elapsed and the entry has not been referenced again
ARP_TASK_PROCESS_RATE ARP task processing rate, in seconds the ARP module will process a
timer event with this rate for maintaining its own queues, processing
timeouts, etc. Choose it so that the other ARP_CACHE_xxx_TMO are
multiple of this
Description
The configuration of the TCP/IP Stack ARP is based on the file sys_config.h
This header file contains the configuration selection for the TCP/IP Stack ARP. Based on the selections made, the TCP/IP Stack
ARP will support or not support selected features. These configuration settings will apply to the single instance of the TCP/IP
Stack ARP.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.4.5.1 ARP_CACHE_ENTRIES_97J60 Macro
C
#define ARP_CACHE_ENTRIES_97J60 5
Description
This is macro ARP_CACHE_ENTRIES_97J60.
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5.8.4.5.2 ARP_CACHE_ENTRIES_DEFAULT Macro
C
#define ARP_CACHE_ENTRIES_DEFAULT 5
Description
number of entries in the cache default number of entries per interface
5.8.4.5.3 ARP_CACHE_ENTRIES_ENCJ60 Macro
C
#define ARP_CACHE_ENTRIES_ENCJ60 5
Description
This is macro ARP_CACHE_ENTRIES_ENCJ60.
5.8.4.5.4 ARP_CACHE_ENTRIES_ENCJ600 Macro
C
#define ARP_CACHE_ENTRIES_ENCJ600 5
Description
This is macro ARP_CACHE_ENTRIES_ENCJ600.
5.8.4.5.5 ARP_CACHE_ENTRIES_MRF24W Macro
C
#define ARP_CACHE_ENTRIES_MRF24W 5
Description
This is macro ARP_CACHE_ENTRIES_MRF24W.
5.8.4.5.6 ARP_CACHE_ENTRIES_PIC32INT Macro
C
#define ARP_CACHE_ENTRIES_PIC32INT 5
Description
specific interaces numbers
5.8.4.5.7 ARP_CACHE_PENDING_ENTRY_TMO Macro
C
#define ARP_CACHE_PENDING_ENTRY_TMO (1 * 60)
Description
timeout for a pending to be solved entry in the cache, in seconds the entry will be removed if the tmo elapsed and the entry has
not been solved a solved entry moves to the solved entries timeout
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5.8.4.5.8 ARP_CACHE_PENDING_RETRY_TMO Macro
C
#define ARP_CACHE_PENDING_RETRY_TMO (2)
Description
timeout for resending an ARP request for a pending entry In order to prevent the ARP flooding the standard recommends it to be
greater than 1 sec. Of course, it should be less than ARP_CACHE_PENDING_ENTRY_TMO
5.8.4.5.9 ARP_CACHE_PERMANENT_QUOTA Macro
C
#define ARP_CACHE_PERMANENT_QUOTA 50
Description
max percentage of permanent entries in the cache note that since permanent entries cannot be removed they tend to degrade
the efficiency of the cache look up
5.8.4.5.10 ARP_CACHE_PURGE_QUANTA Macro
C
#define ARP_CACHE_PURGE_QUANTA 3
Description
how many entries to delete, once the threshold is reached
5.8.4.5.11 ARP_CACHE_PURGE_THRESHOLD Macro
C
#define ARP_CACHE_PURGE_THRESHOLD 75
Description
default purge threshold, percentage once the number of resolved entries in the cache gets beyond the threshold some resolved
entries will be purged
5.8.4.5.12 ARP_CACHE_SOLVED_ENTRY_TMO Macro
C
#define ARP_CACHE_SOLVED_ENTRY_TMO (20 * 60)
Description
timeout for a solved entry in the cache, in seconds the entry will be removed if the tmo elapsed and the entry has not been
referenced again
5.8.4.5.13 ARP_TASK_PROCESS_RATE Macro
C
#define ARP_TASK_PROCESS_RATE (2)
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Description
ARP task processing rate, in seconds the ARP module will process a timer event with this rate for maintaining its own queues,
processing timeouts, etc. Choose it so that the other ARP_CACHE_xxx_TMO are multiple of this
5.8.4.6 Building the Library
This section list the files that are available in the \src of the ARP driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
• arp.c
5.8.4.7 Library Interface
Data Types and Constants
Name Description
TCPIP_ARP_ENTRY_QUERY ARP Entry Query
TCPIP_ARP_ENTRY_TYPE Type of ARP entry
TCPIP_ARP_EVENT_HANDLER Notification handler that can be called when a specific entry is resolved.
TCPIP_ARP_EVENT_TYPE Events reported by ARP
TCPIP_ARP_HANDLE ARP Handle
TCPIP_ARP_OPERATION_TYPE Type of ARP operation
TCPIP_ARP_RESULT ARP Results (success and failure codes)
ARP_MODULE_CONFIG This is type ARP_MODULE_CONFIG.
arp_app_callbacks TCPIP_STACK_USE_ZEROCONF_LINK_LOCAL API specific Definitions
Cache Manipulation Functions
Name Description
TCPIP_ARP_CacheEntriesNoGet Used to retrieve the number of entereies for a specific interface
TCPIP_ARP_CacheThresholdSet Sets the cache threshold for the specified interface in %
TCPIP_ARP_EntryQuery Querries an ARP cache entry using the index of the cache line.
TCPIP_ARP_EntryRemoveAll Removes all the mapping belonging to an interface.
General Functions
Name Description
TCPIP_ARP_CallbacksDeregister De-Registering callbacks with ARP module that are registered previously.
TCPIP_ARP_CallbacksRegister Registering callback with ARP module to get notified about certian events.
TCPIP_ARP_Deinitialize Deinitializes the ARP module.
TCPIP_ARP_EntryGet gets the current mapping for an IP address
TCPIP_ARP_EntryRemove removes the mapping of an address, even a permanent one
TCPIP_ARP_EntryRemoveNet Removes all the entries belonging to a network interface.
TCPIP_ARP_HandlerDeRegister deregister the event handler
TCPIP_ARP_HandlerRegister Register an ARP resolve handler
TCPIP_ARP_Initialize Initializes the ARP module.
TCPIP_ARP_IsResolved Determines if an ARP request has been resolved yet.
TCPIP_ARP_Probe Transmits an ARP probe to resolve an IP address.
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TCPIP_ARP_Resolve Transmits an ARP request to resolve an IP address.
TCPIP_ARP_Task Performs ARP tasks from within TCPIP stack tasks.
TCPIP_ARP_TaskIsPending Returns true if an ARP task is pending, false otherwise.
TCPIP_ARP_EntrySet Adds an ARP cache entry for the specified interface.
TCPIP_ARP_Process Processes an incoming ARP packet.
Description
This section describes the Application Programming Interface (API) functions of the ARP TCP/IP Stack Library.
Refer to each section for a detailed description.
5.8.4.7.1 General Functions
5.8.4.7.1.1 TCPIP_ARP_CallbacksDeregister Function
C
bool TCPIP_ARP_CallbacksDeregister(
int8_t id
);
Description
This function allows end user-application to de-register with callbacks, which were registered previously. This is called by
user-application, when its no longer interested in notifications from ARP-Module. This allows the other application to get
registered with ARP-module.
Preconditions
None
Parameters
Parameters Description
reg_id Registration-id returned in TCPIP_ARP_CallbacksRegister call
Returns
true - On success false - Failure to indicate invalid reg_id
5.8.4.7.1.2 TCPIP_ARP_CallbacksRegister Function
C
int8_t TCPIP_ARP_CallbacksRegister(
struct arp_app_callbacks * app
);
Description
This function allows end user application to register with callbacks, which will be called by ARP module to give notification to
user-application about events occurred at ARP layer. For ex: when a ARP-packet is received, which is conflicting with our own
pair of addresses (MAC-Address and IP-address). This is an extension for zeroconf protocol implementation (ZeroconfLL.c)
Preconditions
None
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Parameters
Parameters Description
app ARP-Application callbacks structure supplied by user-application
Returns
id > 0 - Returns non-negative value that represents the id of registration The same id needs to be used in de-registration -1 -
When registered applications exceed MAX_REG_APPS and there is no free slot for registration
5.8.4.7.1.3 TCPIP_ARP_Deinitialize Function
C
void TCPIP_ARP_Deinitialize(
const TCPIP_STACK_MODULE_CTRL* const stackData
);
Description
Deinitializes the ARP module.
Preconditions
None.
Parameters
Parameters Description
stackCtrl stack initialization parameters, used by TCPIP_ARP_Initialize to initialize the ARP
module.
Returns
None.
Remarks
None.
5.8.4.7.1.4 TCPIP_ARP_EntryGet Function
C
TCPIP_ARP_RESULT TCPIP_ARP_EntryGet(
TCPIP_NET_HANDLE hNet,
IPV4_ADDR* ipAdd,
TCPIP_MAC_ADDR* pHwAdd,
bool probe
);
Description
If probe == false The function behaves identical to TCPIP_ARP_IsResolved(): If the corresponding MAC address exists in the
cache it is copied to the user supplied pHwAdd
If probe == true The function behaves identical to TCPIP_ARP_Resolve():
• If the corresponding MAC address does not exist in the cache
this function transmits and ARP request. Upon the address resolution it calls the registered handler (if available) with the
supplied notification parameter (if != 0)
• If the hardware address exists, the result is written to pHwAdd
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Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet Interface to use
ipAdd The ip address to get entries from
pHwAdd pointer to store the hardware address
probe boolean to specify if ARP probing is initiated or not
Returns
ARP_RES_ENTRY_SOLVED - if the required entry is already solved ARP_RES_ENTRY_QUEUED - if the required entry was
already queued ARP_RES_ENTRY_NEW - if the operation succeeded and a new entry was added (and queued for resolving)
ARP_RES_CACHE_FULL - if new entry could not be inserted, the cache was full ARP_RES_BAD_ADDRESS - bad address
specified ARP_RES_NO_INTERFACE - no such interface
Remarks
similar to TCPIP_ARP_Resolve() + TCPIP_ARP_IsResolved() It avoids a double hash search when the mapping exists.
Example
None
5.8.4.7.1.5 TCPIP_ARP_EntryRemove Function
C
TCPIP_ARP_RESULT TCPIP_ARP_EntryRemove(
TCPIP_NET_HANDLE hNet,
IPV4_ADDR* ipAdd
);
Description
None
Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet Interface to use
ipAdd ip Address to remove entries for
Returns
TCPIP_ARP_RESULT On Success - On Failure - ARP_RES_NO_ENTRY (if no such mapping exists)
Remarks
None
Example
None
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5.8.4.7.1.6 TCPIP_ARP_EntryRemoveNet Function
C
TCPIP_ARP_RESULT TCPIP_ARP_EntryRemoveNet(
TCPIP_NET_HANDLE hNet,
IPV4_ADDR* ipAdd,
IPV4_ADDR* mask,
TCPIP_ARP_ENTRY_TYPE type
);
Description
if(entry->type == type and entry->ipAdd & mask == ipAdd & mask) then remove entry
Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet Interface handle to use
ipAdd ip address
mask ip address of mask
type type of entries to remove:
valid types ARP_ENTRY_TYPE_PERMANENT ARP_ENTRY_TYPE_COMPLETE
ARP_ENTRY_TYPE_INCOMPLETE ARP_ENTRY_TYPE_ANY
Returns
ARP_RES_OK
Remarks
None
Example
None
5.8.4.7.1.7 TCPIP_ARP_HandlerDeRegister Function
C
bool TCPIP_ARP_HandlerDeRegister(
TCPIP_ARP_HANDLE hArp
);
Description
None
Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hArp ARP Handle
Returns
bool On Success - true On Failure - false (If no such handler registered)
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Remarks
None
Example
None
5.8.4.7.1.8 TCPIP_ARP_HandlerRegister Function
C
TCPIP_ARP_HANDLE TCPIP_ARP_HandlerRegister(
TCPIP_NET_HANDLE hNet,
TCPIP_ARP_EVENT_HANDLER handler,
const void* hParam
);
Description
NONE
Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet Specifies interface to register on. Use hNet == 0 to register on all interfaces
available.
handler Handler to be called for event.
hParam The hParam is passed by the client and will be used by the ARP when the
notification is made. It is used for per-thread content or if more modules, for
example, share the same handler and need a way to differentiate the callback.
Returns
TCPIP_ARP_HANDLE On Success - Returns a valid handle On Failure - null handle
Remarks
NONE
Example
None
5.8.4.7.1.9 TCPIP_ARP_Initialize Function
C
bool TCPIP_ARP_Initialize(
const TCPIP_STACK_MODULE_CTRL* const stackData,
const ARP_MODULE_CONFIG* arpData
);
Description
Initializes the ARP module. Calls can be done with the request of not tearing down the ARP cache This helps for ifup/ifdown
sequences. Of course, if this is the case the memory allocated for the ARP cache has to be from a persistent heap.
Preconditions
None
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Parameters
Parameters Description
stackCtrl stack initialization parameters
arpData ARP specific initialization parameters
Returns
true if initialization succeded, false otherwise
Remarks
The request to maintain old ARP cache info (deleteOld field from the ARP_MODULE_CONFIG initialization data) is not
implemented for stack nit/deinit sequences. To maintain the data after the stack is completely de-initialized would need a
persistent heap that's not yet implemented. The selection cannot be changed by ifup since this operation does not carry ARP
configuration parameters (arpDate == 0).
5.8.4.7.1.10 TCPIP_ARP_IsResolved Function
C
bool TCPIP_ARP_IsResolved(
TCPIP_NET_HANDLE hNet,
IPV4_ADDR* IPAddr,
TCPIP_MAC_ADDR* MACAddr
);
Description
This function checks if an ARP request has been resolved yet, and if so, stores the resolved MAC address in the pointer
provided.
Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet interface to use
IPAddr The IP address to be resolved. This must match the IP address provided to the
TCPIP_ARP_Resolve() function call.
MACAddr A buffer to store the corresponding MAC address retrieved from the ARP query.
Return Values
Return Values Description
true The IP address has been resolved and MACAddr MAC address field indicates the
response.
false The IP address is not yet resolved. Try calling TCPIP_ARP_IsResolved() again at
a later time. If you don't get a response after a application specific timeout period,
you may want to call TCPIP_ARP_Resolve() again to transmit another ARP query
(in case if the original query or response was lost on the network). If you never
receive an ARP response, this may indicate that the IP address isn't in use.
5.8.4.7.1.11 TCPIP_ARP_Probe Function
C
TCPIP_ARP_RESULT TCPIP_ARP_Probe(
TCPIP_NET_HANDLE hNet,
IPV4_ADDR* IPAddr,
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IPV4_ADDR* srcAddr,
TCPIP_ARP_OPERATION_TYPE opType
);
Description
This function transmits and ARP probe to determine the hardware address of a given IP address. The packet will use the type of
operation and the source address specified as parameters.
Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet interface to use
IPAddr The IP address to be resolved. The address must be specified in network byte
order (big endian).
srcAddr The source address to be used in the ARP packet
opTYpe Operation code to be set in the outgoing ARP packet
Returns
ARP_RES_ENTRY_SOLVED - if the required entry is already solved ARP_RES_ENTRY_QUEUED - if the required entry was
already queued ARP_RES_ENTRY_NEW - if the operation succeeded and a new entry was added (and queued for resolving)
ARP_RES_CACHE_FULL - if new entry could not be inserted, the cache was full ARP_RES_BAD_ADDRESS - bad address
specified ARP_RES_NO_INTERFACE - no such interface
Remarks
This function is a more advanced version of TCPIP_ARP_Resolve. It allows the caller to specify the operation type and the
source address of the outgoiong AARP packet.
No check is done for IPAddr to be valid.
To retrieve the ARP query result, call the TCPIP_ARP_IsResolved() function.
5.8.4.7.1.12 TCPIP_ARP_Resolve Function
C
TCPIP_ARP_RESULT TCPIP_ARP_Resolve(
TCPIP_NET_HANDLE hNet,
IPV4_ADDR* IPAddr
);
Description
This function transmits and ARP request to determine the hardware address of a given IP address. Upon the address resolution
it calls the registered handler (if available) with the supplied notification parameter (if != 0)
Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet interface to use
IPAddr The IP address to be resolved. The address must be specified in network byte
order (big endian).
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Returns
An element from the TCPIP_ARP_RESULT enumeration. ARP_RES_ENTRY_SOLVED - if the required entry is already solved
ARP_RES_ENTRY_QUEUED - if the required entry was already queued ARP_RES_ENTRY_NEW - if the operation succeeded
and a new entry was added (and queued for resolving) ARP_RES_CACHE_FULL - if new entry could not be inserted, the cache
was full ARP_RES_BAD_ADDRESS - bad address specified ARP_RES_NO_INTERFACE - no such interface
Remarks
To retrieve the ARP query result, call the TCPIP_ARP_IsResolved() function.
5.8.4.7.1.13 TCPIP_ARP_Task Function
C
void TCPIP_ARP_Task();
Description
Performs ARP tasks from within TCPIP stack tasks.
Preconditions
None.
Returns
None.
Remarks
None.
5.8.4.7.1.14 TCPIP_ARP_TaskIsPending Function
C
bool TCPIP_ARP_TaskIsPending();
Description
Returns true if an ARP task is pending, false otherwise.
Preconditions
None.
Returns
true - ARP task is pending false - ARP task is not pending
5.8.4.7.1.15 TCPIP_ARP_EntrySet Function
C
TCPIP_ARP_RESULT TCPIP_ARP_EntrySet(
TCPIP_NET_HANDLE hNet,
IPV4_ADDR* ipAdd,
TCPIP_MAC_ADDR* hwAdd,
bool perm
);
Description
Can be added as permanent. Not subject to timeouts. If cache is full, an entry will be deleted to make room.
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Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet Interface to use
ipAdd The ip address
hwAdd
perm
Returns
On Success - ARP_RES_OK/ARP_RES_ENTRY_EXIST ON Failure - An Error (for example, cache is full with permanent
entries that cannot be purged or the permanent quota exceeded)
Remarks
None
Example
None
5.8.4.7.1.16 TCPIP_ARP_Process Function
C
TCPIP_ARP_RESULT TCPIP_ARP_Process(
TCPIP_NET_IF* pIf,
TCPIP_MAC_PACKET* pPkt
);
Description
Retrieves an ARP packet from the MAC buffer and determines if it is a response to our request (in which case the ARP is
resolved) or if it is a request requiring our response (in which case we transmit one.)
Preconditions
ARP packet is ready in the MAC buffer.
Return Values
Return Values Description
ARP_RES_OK processing OK.
ARP_RES_error some error occurred
5.8.4.7.2 Cache Manipulation Functions
5.8.4.7.2.1 TCPIP_ARP_CacheEntriesNoGet Function
C
size_t TCPIP_ARP_CacheEntriesNoGet(
TCPIP_NET_HANDLE hNet,
TCPIP_ARP_ENTRY_TYPE type
);
Description
None
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Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet Interface to use
type Type of ARP entry
Returns
The number of entries of the specified type per interface
Remarks
None
Example
None
5.8.4.7.2.2 TCPIP_ARP_CacheThresholdSet Function
C
TCPIP_ARP_RESULT TCPIP_ARP_CacheThresholdSet(
TCPIP_NET_HANDLE hNet,
int purgeThres,
int purgeEntries
);
Description
once the number of entries in the cache is > than the threshold a number of purgeEntries (usually one) will be discarded
Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet Interface handle to use
purgeThres Threshold to start cache purging
purgeEntries Number of entries to purge
Returns
ARP_RES_OK
Remarks
None
Example
None
5.8.4.7.2.3 TCPIP_ARP_EntryQuery Function
C
TCPIP_ARP_RESULT TCPIP_ARP_EntryQuery(
TCPIP_NET_HANDLE hNet,
size_t index,
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TCPIP_ARP_ENTRY_QUERY* pArpQuery
);
Description
None
Preconditions
ARP module should have been initialized The index has to be a valid one i.e. < then TCPIP_ARP_CacheEntriesNoGet()
populates the supplied query routine if not NULL
Parameters
Parameters Description
hNet Interface handle to use
index Index to cache
pArpQuery entry type, ip address, hardware address
Returns
On Success - ARP_RES_OK On Failure - ARP_RES_BAD_INDEX (if index is out of range) use it for displaying the cache
contents
Remarks
None
Example
None
5.8.4.7.2.4 TCPIP_ARP_EntryRemoveAll Function
C
TCPIP_ARP_RESULT TCPIP_ARP_EntryRemoveAll(
TCPIP_NET_HANDLE hNet
);
Description
None
Preconditions
ARP module should have been initialized
Parameters
Parameters Description
hNet network interface handle
Returns
ARP_RES_OK
Remarks
None
Example
None
5.8.4.7.3 Data Types and Constants
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5.8.4.7.3.1 TCPIP_ARP_ENTRY_QUERY Structure
C
typedef struct {
TCPIP_ARP_ENTRY_TYPE entryType;
IPV4_ADDR entryIpAdd;
TCPIP_MAC_ADDR entryHwAdd;
} TCPIP_ARP_ENTRY_QUERY;
Description
Structure: TCPIP_ARP_ENTRY_QUERY
None
Members
Members Description
TCPIP_ARP_ENTRY_TYPE entryType; what entry type
IPV4_ADDR entryIpAdd; the entry IP address
TCPIP_MAC_ADDR entryHwAdd; the entry hardware address
5.8.4.7.3.2 TCPIP_ARP_ENTRY_TYPE Enumeration
C
typedef enum {
ARP_ENTRY_TYPE_INVALID,
ARP_ENTRY_TYPE_PERMANENT,
ARP_ENTRY_TYPE_COMPLETE,
ARP_ENTRY_TYPE_INCOMPLETE,
ARP_ENTRY_TYPE_ANY,
ARP_ENTRY_TYPE_TOTAL
} TCPIP_ARP_ENTRY_TYPE;
Description
Enumeration: TCPIP_ARP_ENTRY_TYPE
None
Members
Members Description
ARP_ENTRY_TYPE_INVALID empty entry
ARP_ENTRY_TYPE_PERMANENT entry valid and permanent
ARP_ENTRY_TYPE_COMPLETE entry valid
ARP_ENTRY_TYPE_INCOMPLETE entry not resolved yet
ARP_ENTRY_TYPE_ANY any busy entry (PERMANENT|COMPLETE|INCOMPLETE)
ARP_ENTRY_TYPE_TOTAL total entries - the number of entries the cache can store
Remarks
None
5.8.4.7.3.3 TCPIP_ARP_EVENT_HANDLER Type
C
typedef void (* TCPIP_ARP_EVENT_HANDLER)(TCPIP_NET_HANDLE hNet, const IPV4_ADDR* ipAdd, const
TCPIP_MAC_ADDR* MACAddr, TCPIP_ARP_EVENT_TYPE evType, const void* param);
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Description
Type: TCPIP_ARP_EVENT_HANDLER
None
Remarks
The param member significance is module dependent. It can be an IP address, pointer to some other structure, etc. The handler
is called when an event of some sort occurs for a particular IP address entry. If pNetIf == 0 then the notification is called for
events on any interface
5.8.4.7.3.4 TCPIP_ARP_EVENT_TYPE Enumeration
C
typedef enum {
ARP_EVENT_SOLVED = 0x01,
ARP_EVENT_UPDATED = 0x02,
ARP_EVENT_PERM_UPDATE = 0x04,
ARP_EVENT_TMO = -1
} TCPIP_ARP_EVENT_TYPE;
Description
Enumeration: TCPIP_ARP_EVENT_TYPE
None
Members
Members Description
ARP_EVENT_SOLVED = 0x01 a queued cache entry was solved;
ARP_EVENT_UPDATED = 0x02 an existent cache entry was updated
ARP_EVENT_PERM_UPDATE = 0x04 an update for an permanent entry was received however the permanent entry was
not updated
ARP_EVENT_TMO = -1 an entry could not be solved and a tmo occurred
Remarks
Possibly multiple events can be set, where it makes sense.
5.8.4.7.3.5 TCPIP_ARP_HANDLE Type
C
typedef const void* TCPIP_ARP_HANDLE;
Description
Type: TCPIP_ARP_HANDLE
A handle that a client can use.
Remarks
This handle can be used by the client after the event handler has been registered.
5.8.4.7.3.6 TCPIP_ARP_OPERATION_TYPE Enumeration
C
typedef enum {
ARP_OPERATION_REQ = 1,
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ARP_OPERATION_RESP = 2,
ARP_OPERATION_MASK = 0x000f,
ARP_OPERATION_CONFIGURE = 0x1000
} TCPIP_ARP_OPERATION_TYPE;
Description
Enumeration: TCPIP_ARP_OPERATION_TYPE
Operation to be performed by an ARP probe
Members
Members Description
ARP_OPERATION_REQ = 1 ARP request
ARP_OPERATION_RESP = 2 ARP respone
ARP_OPERATION_MASK = 0x000f extract ARP operation
ARP_OPERATION_CONFIGURE = 0x1000 stack configuration ARP packet
Remarks
Used for low level functionality, TCPIP_ARP_Probe
5.8.4.7.3.7 TCPIP_ARP_RESULT Enumeration
C
typedef enum {
ARP_RES_OK = 0,
ARP_RES_ENTRY_NEW,
ARP_RES_ENTRY_SOLVED,
ARP_RES_ENTRY_QUEUED,
ARP_RES_ENTRY_EXIST,
ARP_RES_PERM_QUOTA_EXCEED,
ARP_RES_NO_ENTRY = -1,
ARP_RES_CACHE_FULL = -2,
ARP_RES_TX_FAILED = -3,
ARP_RES_BAD_INDEX = -4,
ARP_RES_BAD_ADDRESS = -5,
ARP_RES_NO_INTERFACE = -6,
ARP_RES_BAD_TYPE = -7,
ARP_RES_CONFIGURE_ERR = -8
} TCPIP_ARP_RESULT;
Description
Enumeration: TCPIP_ARP_RESULT
Various Definitions for Success and Failure Codes
Members
Members Description
ARP_RES_OK = 0 operation succeeded
ARP_RES_ENTRY_NEW operation succeeded and a new entry was added
ARP_RES_ENTRY_SOLVED the required entry is already solved
ARP_RES_ENTRY_QUEUED the required entry was already queued
ARP_RES_ENTRY_EXIST the required entry was already cached
ARP_RES_PERM_QUOTA_EXCEED info: the quota of permanent entries was exceeded
ARP_RES_NO_ENTRY = -1 no such entry exists
ARP_RES_CACHE_FULL = -2 the cache is full and no entry could be removed to make room
ARP_RES_TX_FAILED = -3 failed to transmit an ARP message
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ARP_RES_BAD_INDEX = -4 bad query index
ARP_RES_BAD_ADDRESS = -5 bad IP address specified
ARP_RES_NO_INTERFACE = -6 no such interface exists
ARP_RES_BAD_TYPE = -7 no such type is valid/exists
ARP_RES_CONFIGURE_ERR = -8 interface is configuring now, no ARP probes
Remarks
None
5.8.4.7.3.8 ARP_MODULE_CONFIG Structure
C
typedef struct {
size_t cacheEntries;
bool deleteOld;
int entrySolvedTmo;
int entryPendingTmo;
int entryRetryTmo;
int permQuota;
int purgeThres;
int purgeQuanta;
} ARP_MODULE_CONFIG;
Description
This is type ARP_MODULE_CONFIG.
Members
Members Description
size_t cacheEntries; cache entries for this interface
bool deleteOld; delete old cache if still in place, else don't re-initialize it
int entrySolvedTmo; solved entry removed after this tmo if not referenced - seconds
int entryPendingTmo; timeout for a pending to be solved entry in the cache, in seconds
int entryRetryTmo; timeout for resending an ARP request for a pending entry - seconds 1 sec < tmo <
entryPendingTmo
int permQuota; max percentage of permanent entries allowed in the cache -
int purgeThres; purge threshold -
int purgeQuanta; no of entries to delete once the threshold is reached
5.8.4.7.3.9 arp_app_callbacks Structure
C
struct arp_app_callbacks {
bool used;
void (* TCPIP_ARP_PacketNotify)(TCPIP_NET_IF* pNetIf ,uint32_t SenderIPAddr ,uint32_t
TargetIPAddr ,TCPIP_MAC_ADDR* SenderMACAddr ,TCPIP_MAC_ADDR* TargetMACAddr ,uint8_t op_req);
};
Description
TCPIP_STACK_USE_ZEROCONF_LINK_LOCAL API specific Definitions
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5.8.4.8 Files
Files
Name Description
arp.h This is file arp.h.
arp_config.h ARP configuration file
arp_manager.h Stack internal definitions for ARP module
Description
5.8.4.8.1 arp.h
This is file arp.h.
Enumerations
Name Description
TCPIP_ARP_ENTRY_TYPE Type of ARP entry
TCPIP_ARP_EVENT_TYPE Events reported by ARP
TCPIP_ARP_OPERATION_TYPE Type of ARP operation
TCPIP_ARP_RESULT ARP Results (success and failure codes)
Functions
Name Description
TCPIP_ARP_CacheEntriesNoGet Used to retrieve the number of entereies for a specific interface
TCPIP_ARP_CacheThresholdSet Sets the cache threshold for the specified interface in %
TCPIP_ARP_EntryGet gets the current mapping for an IP address
TCPIP_ARP_EntryQuery Querries an ARP cache entry using the index of the cache line.
TCPIP_ARP_EntryRemove removes the mapping of an address, even a permanent one
TCPIP_ARP_EntryRemoveAll Removes all the mapping belonging to an interface.
TCPIP_ARP_EntryRemoveNet Removes all the entries belonging to a network interface.
TCPIP_ARP_EntrySet Adds an ARP cache entry for the specified interface.
TCPIP_ARP_HandlerDeRegister deregister the event handler
TCPIP_ARP_HandlerRegister Register an ARP resolve handler
TCPIP_ARP_IsResolved Determines if an ARP request has been resolved yet.
TCPIP_ARP_Probe Transmits an ARP probe to resolve an IP address.
TCPIP_ARP_Resolve Transmits an ARP request to resolve an IP address.
Structures
Name Description
ARP_MODULE_CONFIG This is type ARP_MODULE_CONFIG.
TCPIP_ARP_ENTRY_QUERY ARP Entry Query
Types
Name Description
TCPIP_ARP_EVENT_HANDLER Notification handler that can be called when a specific entry is resolved.
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TCPIP_ARP_HANDLE ARP Handle
5.8.4.8.2 arp_config.h
Address Resolution Protocol (ARP) Configuration file
This file contains the ARP module configuration options
Macros
Name Description
ARP_CACHE_ENTRIES_97J60 This is macro ARP_CACHE_ENTRIES_97J60.
ARP_CACHE_ENTRIES_DEFAULT number of entries in the cache default number of entries per interface
ARP_CACHE_ENTRIES_ENCJ60 This is macro ARP_CACHE_ENTRIES_ENCJ60.
ARP_CACHE_ENTRIES_ENCJ600 This is macro ARP_CACHE_ENTRIES_ENCJ600.
ARP_CACHE_ENTRIES_MRF24W This is macro ARP_CACHE_ENTRIES_MRF24W.
ARP_CACHE_ENTRIES_PIC32INT specific interaces numbers
ARP_CACHE_PENDING_ENTRY_TMO timeout for a pending to be solved entry in the cache, in seconds the
entry will be removed if the tmo elapsed and the entry has not been
solved a solved entry moves to the solved entries timeout
ARP_CACHE_PENDING_RETRY_TMO timeout for resending an ARP request for a pending entry In order to
prevent the ARP flooding the standard recommends it to be greater than
1 sec. Of course, it should be less than
ARP_CACHE_PENDING_ENTRY_TMO
ARP_CACHE_PERMANENT_QUOTA max percentage of permanent entries in the cache note that since
permanent entries cannot be removed they tend to degrade the efficiency
of the cache look up
ARP_CACHE_PURGE_QUANTA how many entries to delete, once the threshold is reached
ARP_CACHE_PURGE_THRESHOLD default purge threshold, percentage once the number of resolved entries
in the cache gets beyond the threshold some resolved entries will be
purged
ARP_CACHE_SOLVED_ENTRY_TMO timeout for a solved entry in the cache, in seconds the entry will be
removed if the tmo elapsed and the entry has not been referenced again
ARP_TASK_PROCESS_RATE ARP task processing rate, in seconds the ARP module will process a
timer event with this rate for maintaining its own queues, processing
timeouts, etc. Choose it so that the other ARP_CACHE_xxx_TMO are
multiple of this
5.8.4.8.3 arp_manager.h
ARP module manager header
This file contains the stack internal API for the ARP module
Functions
Name Description
TCPIP_ARP_CallbacksDeregister De-Registering callbacks with ARP module that are registered previously.
TCPIP_ARP_CallbacksRegister Registering callback with ARP module to get notified about certian events.
TCPIP_ARP_Deinitialize Deinitializes the ARP module.
TCPIP_ARP_Initialize Initializes the ARP module.
TCPIP_ARP_Process Processes an incoming ARP packet.
TCPIP_ARP_Task Performs ARP tasks from within TCPIP stack tasks.
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TCPIP_ARP_TaskIsPending Returns true if an ARP task is pending, false otherwise.
Structures
Name Description
arp_app_callbacks TCPIP_STACK_USE_ZEROCONF_LINK_LOCAL API specific Definitions
5.8.5 Berkeley TCP/IP Stack Library
5.8.5.1 Introduction
Berkeley TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the berkeley TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The Berkeley Socket Distribution (BSD) APIs provide a BSD wrapper to the native Microchip TCP/IP Stack APIs. Using this
interface, programmers familiar with BSD sockets can quickly develop applications using Microchip's TCP/IP Stack.
The illustration below shows a typical interaction for a TCP server or client using the Berkeley socket APIs.
5.8.5.2 Release Notes
MPLAB Harmony Version: v0.70b Berkeley TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.5.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
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YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.5.4 Using the Library
This topic describes the basic architecture of the Berkeley TCP/IP Stack Library and provides information and examples on how
to use it.
Interface Header File: berkeley_api.h
The interface to the Berkeley TCP/IP Stack library is defined in the "berkeley_api.h" header file. This file is included by the
"tcpip.h" file. Any C language source (.c) file that uses the berkeley TCP/IP Stack library should include "tcpip.h".
Library File:
The Berkeley TCP/IP Stack library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.5.4.1 Abstraction Model
This library provides the API of the Berkeley TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
Berkeley Software Abstraction Block Diagram
The illustration below shows a typical interaction for a TCP server or client using the Berkeley socket APIs.
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5.8.5.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Berkeley module.
Library Interface Section Description
Functions Routines for Configuring DHCP
Data Types and Constants This section provides various definitions describing This API
5.8.5.5 Configuring the Library
Macros
Name Description
MAX_BSD_CLIENT_CONNECTIONS Berkeley API client Sockets simultaneous supported connections.
MAX_BSD_SERVER_CONNECTIONS Berkeley API server Sockets simultaneous supported connections.
Description
The configuration of the Berkeley TCP/IP Stack is based on the file tcpip_config.h
This header file contains the configuration selection for the Berkeley TCP/IP Stack. Based on the selections made, the Berkeley
TCP/IP Stack will support or not support selected features. These configuration settings will apply to all instances of the Berkeley
TCP/IP Stack.
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This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.5.5.1 MAX_BSD_CLIENT_CONNECTIONS Macro
C
#define MAX_BSD_CLIENT_CONNECTIONS (2)
Description
Berkeley API client Sockets simultaneous supported connections.
5.8.5.5.2 MAX_BSD_SERVER_CONNECTIONS Macro
C
#define MAX_BSD_SERVER_CONNECTIONS (2)
Description
Berkeley API server Sockets simultaneous supported connections.
5.8.5.6 Building the Library
This section list the files that are available in the \src of the Berkeley driver. It lists which files need to be included in the build
based on either a hardware feature present on the board or configuration option selected by the system.
5.8.5.7 Library Interface
Data Types and Constants
Name Description
AF_INET Internet Address Family - UDP, TCP, etc.
INADDR_ANY IP address for server binding.
INVALID_TCP_PORT Invalid TCP port
IP_ADDR_ANY IP Address for server binding
IPPROTO_IP Indicates IP pseudo-protocol.
IPPROTO_TCP Indicates TCP for the internet address family.
IPPROTO_UDP Indicates UDP for the internet address family.
SOCK_DGRAM Connectionless datagram socket. Use UDP for the internet address family.
SOCK_STREAM Connection based byte streams. Use TCP for the internet address family.
SOCKET_CNXN_IN_PROGRESS Socket connection state.
SOCKET_DISCONNECTED Socket disconnected
SOCKET_ERROR Socket error
BERKELEY_MODULE_CONFIG Berkeley API module configuration structure
SOCKADDR generic address structure for all address families
SOCKADDR_IN In the Internet address family
SOCKET Socket descriptor
in_addr in_addr structure
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sockaddr generic address structure for all address families
sockaddr_in In the Internet address family
Functions
Name Description
accept This function accepts connection requests queued for a listening socket.
bind This function assigns a name to the socket descriptor.
closesocket The closesocket function closes an existing socket.
connect This function connects to the peer communications end point.
gethostname Returns the standard host name for the system.
listen The listen function sets the specified socket in a listen mode
recv The recv() function is used to receive incoming data that has been queued for a
socket.
recvfrom The recvfrom() function is used to receive incoming data that has been queued for
a socket.
send The send function is used to send outgoing data on an already connected socket.
sendto This function used to send the data for both connection oriented and
connection-less sockets.
socket This function creates a new Berkeley socket.
Description
This section describes the Application Programming Interface (API) functions of the Berkeley TCP/IP Stack.
Refer to each section for a detailed description.
5.8.5.7.1 Functions
5.8.5.7.1.1 accept Function
C
SOCKET accept(
SOCKET s,
struct sockaddr* addr,
int* addrlen
);
Description
The accept function is used to accept connection requests queued for a listening socket. If a connection request is pending,
accept removes the request from the queue, and a new socket is created for the connection. The original listening socket
remains open and continues to queue new connection requests. The socket must be a SOCK_STREAM type socket.
Preconditions
listen function should be called.
Parameters
Parameters Description
s Socket descriptor returned from a previous call to socket. must be bound to a local
name and in listening mode.
addr Optional pointer to a buffer that receives the address of the connecting entity.
addrlen Optional pointer to an integer that contains the length of the address addr
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Returns
If the accept function succeeds, it returns a non-negative integer that is a descriptor for the accepted socket. Otherwise, the
value SOCKET_ERROR is returned. (and errno set accordingly).
Remarks
None.
5.8.5.7.1.2 bind Function
C
int bind(
SOCKET s,
const struct sockaddr* name,
int namelen
);
Description
The bind function assigns a name to an unnamed socket. The name represents the local address of the communication
endpoint. For sockets of type SOCK_STREAM, the name of the remote endpoint is assigned when a connect or accept function
is executed.
Preconditions
socket function should be called.
Parameters
Parameters Description
s Socket descriptor returned from a previous call to socket.
name pointer to the sockaddr structure containing the local address of the socket.
namelen length of the sockaddr structure.
Returns
If bind is successful, a value of 0 is returned. A return value of SOCKET_ERROR indicates an error. (and errno set accordingly).
Remarks
None.
5.8.5.7.1.3 closesocket Function
C
int closesocket(
SOCKET s
);
Description
The closesocket function closes an existing socket. This function releases the socket descriptor s. Any data buffered at the
socket is discarded. If the socket s is no longer needed, closesocket() must be called in order to release all resources associated
with s.
Preconditions
None.
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Parameters
Parameters Description
s Socket descriptor returned from a previous call to socket
Returns
If closesocket is successful, a value of 0 is returned. A return value of SOCKET_ERROR (-1) indicates an error. (and errno set
accordingly).
Remarks
None.
5.8.5.7.1.4 connect Function
C
int connect(
SOCKET s,
struct sockaddr* name,
int namelen
);
Description
The connect function assigns the address of the peer communications endpoint. For stream sockets, connection is established
between the endpoints. For datagram sockets, an address filter is established between the endpoints until changed with another
connect() function.
Preconditions
socket function should be called.
Parameters
Parameters Description
s Socket descriptor returned from a previous call to socket.
name pointer to the sockaddr structure containing the peer address and port number.
namelen length of the sockaddr structure.
Returns
If the connect() function succeeds, it returns 0. Otherwise, the value SOCKET_ERROR is returned to indicate an error condition
(and errno set accordingly). For stream based socket, if the connection is not established yet, connect returns SOCKET_ERROR
and errno = EINPROGRESS.
Remarks
None.
5.8.5.7.1.5 gethostname Function
C
int gethostname(
char* name,
int namelen
);
Description
This function returns the standard host name of the system which is calling this function. The returned name is null-terminated.
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Preconditions
None.
Parameters
Parameters Description
name Pointer to a buffer that receives the local host name.
namelen size of the name array.
Returns
Success will return a value of 0. If name is too short to hold the host name or any other error occurs, SOCKET_ERROR (-1) will
be returned (and errno set accordingly). On error, *name will be unmodified and no null terminator will be generated.
Remarks
The function returns the host name as set on the default network interface.
5.8.5.7.1.6 listen Function
C
int listen(
SOCKET s,
int backlog
);
Description
This function sets the specified socket in a listen mode. Calling the listen function indicates that the application is ready to accept
connection requests arriving at a socket of type SOCK_STREAM. The connection request is queued (if possible) until accepted
with an accept function. The backlog parameter defines the maximum number of pending connections that may be queued.
Preconditions
bind() must have been called on the s socket first.
Parameters
Parameters Description
s Socket identifier returned from a prior socket() call.
backlog Maximum number of connection requests that can be queued. Note that each
backlog requires a TCP socket to be allocated.
Returns
Returns 0 on success, else return SOCKET_ERROR. (and errno set accordingly).
Remarks
None
5.8.5.7.1.7 recv Function
C
int recv(
SOCKET s,
char* buf,
int len,
int flags
);
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Description
The recv() function is used to receive incoming data that has been queued for a socket. This function can be used with both
datagram and stream socket. If the available data is too large to fit in the supplied application buffer buf, excess bytes are
discarded in case of SOCK_DGRAM type sockets. For SOCK_STREAM types, the data is buffered internally so the application
can retreive all data by multiple calls of recvfrom.
Preconditions
connect function should be called for TCP and UDP sockets. Server side, accept function should be called.
Parameters
Parameters Description
s Socket descriptor returned from a previous call to socket.
buf application data receive buffer.
len buffer length in bytes.
flags no significance in this implementation
Returns
If recv is successful, the number of bytes copied to application buffer buf is returned. A return value of SOCKET_ERROR (-1)
indicates an error condition (and errno set accordingly). A value of zero indicates socket has been shutdown by the peer.
Remarks
None.
5.8.5.7.1.8 recvfrom Function
C
int recvfrom(
SOCKET s,
char* buf,
int len,
int flags,
struct sockaddr* from,
int* fromlen
);
Description
The recvfrom() function is used to receive incoming data that has been queued for a socket. This function can be used with both
datagram and stream type sockets. If the available data is too large to fit in the supplied application buffer buf, excess bytes are
discarded in case of SOCK_DGRAM type sockets. For SOCK_STREAM types, the data is buffered internally so the application
can retreive all data by multiple calls of recvfrom.
Preconditions
socket function should be called.
Parameters
Parameters Description
s Socket descriptor returned from a previous call to socket.
buf application data receive buffer.
len buffer length in bytes.
flags message flags. Currently this is not supported.
from pointer to the sockaddr structure that will be filled in with the destination address.
fromlen size of buffer pointed by from.
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Returns
If recvfrom is successful, the number of bytes copied to application buffer buf is returned. A return value of SOCKET_ERROR
(-1) indicates an error condition (and errno set accordingly). A value of zero indicates socket has been shutdown by the peer.
Remarks
None.
5.8.5.7.1.9 send Function
C
int send(
SOCKET s,
const char* buf,
int len,
int flags
);
Description
The send function is used to send outgoing data on an already connected socket. This function is used to send a reliable,
ordered stream of data bytes on a socket of type SOCK_STREAM but can also be used to send datagrams on a socket of type
SOCK_DGRAM.
Preconditions
connect function should be called for TCP and UDP sockets. Server side, accept function should be called.
Parameters
Parameters Description
s Socket descriptor returned from a previous call to socket.
buf application data buffer containing data to transmit.
len length of data in bytes.
flags message flags. Currently this field is not supported.
Returns
On success, send returns number of bytes sent. Zero indicates no data send. In case of error it returns SOCKET_ERROR (and
errno set accordingly).
Remarks
None.
5.8.5.7.1.10 sendto Function
C
int sendto(
SOCKET s,
const char* buf,
int len,
int flags,
const struct sockaddr* to,
int tolen
);
Description
The sendto function is used to send outgoing data on a socket. The destination address is given by to and tolen. Both Datagram
and stream sockets are supported.
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Preconditions
socket function should be called.
Parameters
Parameters Description
s Socket descriptor returned from a previous call to socket.
buf application data buffer containing data to transmit.
len length of data in bytes.
flags message flags. Currently this field is not supported.
to Optional pointer to the the sockaddr structure containing the destination address.
If NULL, the currently bound remote port and IP address are used as the
destination.
tolen length of the sockaddr structure.
Returns
On success, sendto returns number of bytes sent. In case of error returns SOCKET_ERROR (and errno set accordingly).
Remarks
None.
5.8.5.7.1.11 socket Function
C
SOCKET socket(
int af,
int type,
int protocol
);
Description
This function creates a new BSD socket for the microchip TCPIP stack. The return socket descriptor is used for the subsequent
BSD operations.
Preconditions
BerkeleySocketInit function should be called.
Parameters
Parameters Description
af address family - AF_INET.
type socket type SOCK_DGRAM or SOCK_STREAM.
protocol IP protocol IPPROTO_UDP or IPPROTO_TCP.
Returns
New socket descriptor. SOCKET_ERROR in case of error. (and errno set accordingly).
Remarks
None.
5.8.5.7.2 Data Types and Constants
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5.8.5.7.2.1 AF_INET Macro
C
#define AF_INET 2 // Internet Address Family - UDP, TCP, etc.
Description
Internet Address Family - UDP, TCP, etc.
5.8.5.7.2.2 INADDR_ANY Macro
C
#define INADDR_ANY 0x00000000u // IP address for server binding.
Description
IP address for server binding.
5.8.5.7.2.3 INVALID_TCP_PORT Macro
C
#define INVALID_TCP_PORT (0L) //Invalid TCP port
Description
Invalid TCP port
5.8.5.7.2.4 IP_ADDR_ANY Macro
C
#define IP_ADDR_ANY 0u // IP Address for server binding
Description
IP Address for server binding
5.8.5.7.2.5 IPPROTO_IP Macro
C
#define IPPROTO_IP 0 // Indicates IP pseudo-protocol.
Description
Indicates IP pseudo-protocol.
5.8.5.7.2.6 IPPROTO_TCP Macro
C
#define IPPROTO_TCP 6 // Indicates TCP for the internet address family.
Description
Indicates TCP for the internet address family.
5.8.5.7.2.7 IPPROTO_UDP Macro
C
#define IPPROTO_UDP 17 // Indicates UDP for the internet address family.
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Description
Indicates UDP for the internet address family.
5.8.5.7.2.8 SOCK_DGRAM Macro
C
#define SOCK_DGRAM 110 //Connectionless datagram socket. Use UDP for the internet address
family.
Description
Connectionless datagram socket. Use UDP for the internet address family.
5.8.5.7.2.9 SOCK_STREAM Macro
C
#define SOCK_STREAM 100 //Connection based byte streams. Use TCP for the internet address
family.
Description
Connection based byte streams. Use TCP for the internet address family.
5.8.5.7.2.10 SOCKET_CNXN_IN_PROGRESS Macro
C
#define SOCKET_CNXN_IN_PROGRESS (-2) //Socket connection state.
Description
Socket connection state.
5.8.5.7.2.11 SOCKET_DISCONNECTED Macro
C
#define SOCKET_DISCONNECTED (-3) //Socket disconnected
Description
Socket disconnected
5.8.5.7.2.12 SOCKET_ERROR Macro
C
#define SOCKET_ERROR (-1) //Socket error
Description
Socket error
5.8.5.7.2.13 BERKELEY_MODULE_CONFIG Structure
C
typedef struct {
} BERKELEY_MODULE_CONFIG;
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Description
Berkeley API module configuration structure
5.8.5.7.2.14 SOCKADDR Type
C
typedef struct sockaddr SOCKADDR;
Description
generic address structure for all address families
5.8.5.7.2.15 SOCKADDR_IN Type
C
typedef struct sockaddr_in SOCKADDR_IN;
Description
In the Internet address family
5.8.5.7.2.16 SOCKET Type
C
typedef int16_t SOCKET;
Description
Socket descriptor
5.8.5.7.2.17 in_addr Structure
C
struct in_addr {
union {
struct {
uint8_t s_b1, s_b2, s_b3, s_b4;
} S_un_b;
struct {
uint16_t s_w1, s_w2;
} S_un_w;
uint32_t S_addr;
} S_un;
};
Description
in_addr structure
5.8 TCP/IP Stack Library Help MPLAB Harmony Help Berkeley TCP/IP Stack Library
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Members
Members Description
union {
struct {
uint8_t s_b1, s_b2, s_b3, s_b4;
} S_un_b;
struct {
uint16_t s_w1, s_w2;
} S_un_w;
uint32_t S_addr;
} S_un;
union of IP address
struct {
uint8_t s_b1, s_b2, s_b3, s_b4;
} S_un_b;
IP address in Byte
struct {
uint16_t s_w1, s_w2;
} S_un_w;
IP address in Word
uint32_t S_addr; IP address
5.8.5.7.2.18 sockaddr Structure
C
struct sockaddr {
unsigned short sa_family;
char sa_data[14];
};
Description
generic address structure for all address families
Members
Members Description
unsigned short sa_family; address family
char sa_data[14]; up to 14 bytes of direct address
5.8.5.7.2.19 sockaddr_in Structure
C
struct sockaddr_in {
short sin_family;
uint16_t sin_port;
struct in_addr sin_addr;
char sin_zero[8];
};
Description
In the Internet address family
Members
Members Description
short sin_family; Address family; must be AF_INET.
uint16_t sin_port; Internet Protocol (IP) port.
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struct in_addr sin_addr; IP address in network byte order.
char sin_zero[8]; Padding to make structure the same size as SOCKADDR.
5.8.5.8 Files
Files
Name Description
berekely_api_config.h Berekely Sockets API Client and Server
berkeley_api.h
Description
5.8.5.8.1 berekely_api_config.h
Berekely Sockets API Configuration file
This file contains the BerekelyAPI module configuration options
Macros
Name Description
MAX_BSD_CLIENT_CONNECTIONS Berkeley API client Sockets simultaneous supported connections.
MAX_BSD_SERVER_CONNECTIONS Berkeley API server Sockets simultaneous supported connections.
5.8.5.8.2 berkeley_api.h
Berekely Socket Distribution API Header File
Functions
Name Description
accept This function accepts connection requests queued for a listening socket.
bind This function assigns a name to the socket descriptor.
closesocket The closesocket function closes an existing socket.
connect This function connects to the peer communications end point.
gethostname Returns the standard host name for the system.
listen The listen function sets the specified socket in a listen mode
recv The recv() function is used to receive incoming data that has been queued for a
socket.
recvfrom The recvfrom() function is used to receive incoming data that has been queued for
a socket.
send The send function is used to send outgoing data on an already connected socket.
sendto This function used to send the data for both connection oriented and
connection-less sockets.
socket This function creates a new Berkeley socket.
Macros
Name Description
AF_INET Internet Address Family - UDP, TCP, etc.
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INADDR_ANY IP address for server binding.
INVALID_TCP_PORT Invalid TCP port
IP_ADDR_ANY IP Address for server binding
IPPROTO_IP Indicates IP pseudo-protocol.
IPPROTO_TCP Indicates TCP for the internet address family.
IPPROTO_UDP Indicates UDP for the internet address family.
SOCK_DGRAM Connectionless datagram socket. Use UDP for the internet address family.
SOCK_STREAM Connection based byte streams. Use TCP for the internet address family.
SOCKET_CNXN_IN_PROGRESS Socket connection state.
SOCKET_DISCONNECTED Socket disconnected
SOCKET_ERROR Socket error
Structures
Name Description
in_addr in_addr structure
sockaddr generic address structure for all address families
sockaddr_in In the Internet address family
BERKELEY_MODULE_CONFIG Berkeley API module configuration structure
Types
Name Description
SOCKADDR generic address structure for all address families
SOCKADDR_IN In the Internet address family
SOCKET Socket descriptor
5.8.6 DHCP TCP/IP Stack Library
5.8.6.1 Introduction
Dynamic Host Configuration Protocol (DHCP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the DHCP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The DHCP client module will allow your application to dynamically obtain an IP address from a DHCP server on the same
network. Doing this will reset the IP address, subnet mask, gateway address, and some other configuration parameters in your
AppConfig structure.
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5.8.6.2 Release Notes
MPLAB Harmony Version: v0.70b DHCP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.6.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.6.4 Using the Library
This topic describes the basic architecture of the DHCP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: dhcp.h
The interface to the DHCP TCP/IP Stack library is defined in the "dhcp.h" header file. This file is included by the "tcpip.h" file. Any
C language source (.c) file that uses the DHCP TCP/IP Stack library should include "tcpip.h".
Library File:
The DHCP TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.6.4.1 Abstraction Model
This library provides the API of the DHCP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
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Description
DHCP Software Abstraction Block Diagram
This module provides software abstraction of the DHCP module existent in any TCP/IP Stack implementation. It removes the
overhead of address resolution from all other modules in the stack.
Typical DCHP Usage
5.8.6.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the DHCP module.
Library Interface Section Description
Configuration Functions Routines for Configuring DHCP
Status Functions Routines for Obtaining DHCP Status Information
Data Types and Constants This section provides various definitions describing This API
5.8.6.4.3 How the Library Works
To use DHCP, include the files dhcp.c, dhcps.c, and dhcp.h in your project, and add or uncomment the definition "#define
TCPIP_STACK_USE_DHCP_CLIENT" to tcpip_config.h. The TCP/IP stack also includes a simple DHCP server that can supply
an IP address to one DHCP client. To enable this functionality, add the macro "#define TCPIP_STACK_USE_DHCP_SERVER"
to tcpip_config.h.
5.8.6.5 Configuring the Library
Macros
Name Description
DHCP_CLIENT_ENABLED enable/disable the DHCP client at stack start up
DHCP_CLIENT_PORT UDP client local port for DHCP Client transactions
DHCP_SERVER_PORT UDP remote port for DHCP Server
DHCP_TASK_TICK_RATE 5 ms default rate
DHCP_TIMEOUT Defines how long to wait before a DHCP request times out, seconds
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Description
The configuration of the DHCP TCP/IP Stack is based on the file sys_config.h
This header file contains the configuration selection for the DHCP TCP/IP Stack. Based on the selections made, the DHCP
TCP/IP Stack will support or not support selected features. These configuration settings will apply to all instances of the DHCP
TCP/IP Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.6.5.1 DHCP_CLIENT_ENABLED Macro
C
#define DHCP_CLIENT_ENABLED 1
Description
enable/disable the DHCP client at stack start up
Remarks
the interface initialization setting in TCPIP_NETWORK_CONFIG takes precedence!
5.8.6.5.2 DHCP_CLIENT_PORT Macro
C
#define DHCP_CLIENT_PORT (68u)
Description
UDP client local port for DHCP Client transactions
5.8.6.5.3 DHCP_SERVER_PORT Macro
C
#define DHCP_SERVER_PORT (67u)
Description
UDP remote port for DHCP Server
5.8.6.5.4 DHCP_TASK_TICK_RATE Macro
C
#define DHCP_TASK_TICK_RATE (5) // 5 ms default rate
Description
5 ms default rate
5.8.6.5.5 DHCP_TIMEOUT Macro
C
#define DHCP_TIMEOUT (2ul)
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Description
Defines how long to wait before a DHCP request times out, seconds
5.8.6.6 Building the Library
This section list the files that are available in the \src of the DHCP driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.8.6.7 Library Interface
Data Types and Constants
Name Description
DHCP_MODULE_CONFIG DHCP Module Configuration Typedef
TCPIP_DHCP_EVENT_HANDLER DHCP Event Handler
TCPIP_DHCP_EVENT_TYPE DHCP Event Type
TCPIP_DHCP_HANDLE DHCP Handle
Configuration Functions
Name Description
TCPIP_DHCP_Disable Disables the DHCP Client for the specified interface.
TCPIP_DHCP_Enable Enables the DHCP client for the specified interface.
TCPIP_DHCP_HandlerDeRegister DHCP De-Register Handler
TCPIP_DHCP_HandlerRegister DHCP Register Handler
TCPIP_DHCP_Renew Renews the DHCP lease for the specified interface.
TCPIP_DHCP_Request Requests the supplied IPv4 address from a DHCP server.
TCPIP_DHCP_RequestTimeoutSet DHCP Set Request Timeout
Status Functions
Name Description
TCPIP_DHCP_IsBound Determins if the DHCP client has an IP address lease on the specified interface.
TCPIP_DHCP_IsEnabled Determins if the DHCP client is enabled on the specified interface.
TCPIP_DHCP_IsServerDetected Determins if the DHCP client on the specified interface has seen a DHCP server.
Description
This section describes the Application Programming Interface (API) functions of the DHCP TCP/IP Stack.
Refer to each section for a detailed description.
5.8.6.7.1 Configuration Functions
5.8.6.7.1.1 TCPIP_DHCP_Disable Function
C
bool TCPIP_DHCP_Disable(
TCPIP_NET_HANDLE hNet
);
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Description
Disables the DHCP client for the specified interface.
Preconditions
None
Parameters
Parameters Description
pNetIf Interface to disable the DHCP client on.
Returns
true if success false otherwise
Remarks
When the interface continues using its old configuration, it is possible that the lease may expire and the DHCP server provide the
IP to another client. The application should not request the keeping of the old lease unless there is no danger of conflict.
5.8.6.7.1.2 TCPIP_DHCP_Enable Function
C
bool TCPIP_DHCP_Enable(
TCPIP_NET_HANDLE hNet
);
Description
Enables the DHCP client for the specified interface, if it is disabled. If it is already enabled, nothing is done.
Preconditions
None
Parameters
Parameters Description
hNet Interface to enable the DHCP client on.
Returns
true if success false otherwise
5.8.6.7.1.3 TCPIP_DHCP_HandlerDeRegister Function
C
bool TCPIP_DHCP_HandlerDeRegister(
TCPIP_DHCP_HANDLE hDhcp
);
Description
deregister the event handler returns true or false if no such handler registered
5.8.6.7.1.4 TCPIP_DHCP_HandlerRegister Function
C
TCPIP_DHCP_HANDLE TCPIP_DHCP_HandlerRegister(
TCPIP_NET_HANDLE hNet,
TCPIP_DHCP_EVENT_HANDLER handler,
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const void* hParam
);
Description
Register an DHCP event handler. Use hNet == 0 to register on all interfaces available. Returns a valid handle if the call
succeeds, or a null handle if the call failed. Function has to be called after the DHCP is initialized. The hParam is passed by the
client and will be used by the DHCP when the notification is made. It is used for per-thread content or if more modules, for
example, share the same handler and need a way to differentiate the callback.
5.8.6.7.1.5 TCPIP_DHCP_Renew Function
C
bool TCPIP_DHCP_Renew(
TCPIP_NET_HANDLE hNet
);
Description
Tries to contact the server and renew the DHCP lease for the specified interface. The interface sgould have the DHCP enabled
and in bound state for this call to succeed.
Preconditions
DHCP enabled, a valid lease
Parameters
Parameters Description
hNet Interface to renew the DHCP lease on.
Returns
true if success false otherwise
5.8.6.7.1.6 TCPIP_DHCP_Request Function
C
bool TCPIP_DHCP_Request(
TCPIP_NET_HANDLE hNet,
IPV4_ADDR reqAddress
);
Description
If the DHCP client is not enabled on that interface, this call will first try to enable it. If this succeeds or the DHCP client was
already enabled, the following steps are taken: The DHCP client probes the DHCP server and requests the supplied IPv4
address as a valid lease for the specified interface. If the server acknowledges the request, then this is the new IPv4 address of
the interface. If the DHCP server rejects the request, then the whole DHCP process is resumed starting with the DHCP
Discovery phase.
Preconditions
DHCP enabled, a valid lease
Parameters
Parameters Description
hNet Interface to renew the DHCP lease on.
Returns
true if success false otherwise
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Remarks
The requested IPv4 address should be a previous lease that was granted to the host. This call should be used when the host is
restarting.
5.8.6.7.1.7 TCPIP_DHCP_RequestTimeoutSet Function
C
bool TCPIP_DHCP_RequestTimeoutSet(
TCPIP_NET_HANDLE hNet,
int tmo
);
Description
Adjust the DHCP timeout. How long to wait before a DHCP request times out, seconds.
5.8.6.7.2 Status Functions
5.8.6.7.2.1 TCPIP_DHCP_IsBound Function
C
bool TCPIP_DHCP_IsBound(
TCPIP_NET_HANDLE hNet
);
Description
Determins if the DHCP client has an IP address lease on the specified interface.
Preconditions
None
Parameters
Parameters Description
hNet Interface to query
Returns
true - DHCP client has obtained an IP address lease (and likely other parameters) and these values are currently being used.
false - No IP address is currently leased
5.8.6.7.2.2 TCPIP_DHCP_IsEnabled Function
C
bool TCPIP_DHCP_IsEnabled(
TCPIP_NET_HANDLE hNet
);
Description
Determins if the DHCP client is enabled on the specified interface.
Preconditions
None
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Parameters
Parameters Description
hNet Interface to query.
Returns
None
5.8.6.7.2.3 TCPIP_DHCP_IsServerDetected Function
C
bool TCPIP_DHCP_IsServerDetected(
TCPIP_NET_HANDLE hNet
);
Description
Determins if the DHCP client on the specified interface has seen a DHCP server.
Preconditions
None
Parameters
Parameters Description
hNet Interface to query.
Returns
true - At least one DHCP server is attached to the specified network interface. false - No DHCP servers are currently detected on
the specified network interface.
5.8.6.7.3 Data Types and Constants
5.8.6.7.3.1 DHCP_MODULE_CONFIG Structure
C
typedef struct {
bool dhcpEnable;
int dhcpTmo;
int dhcpCliPort;
int dhcpSrvPort;
} DHCP_MODULE_CONFIG;
Description
DHCP Module Configuration
Used in dhcp_config.h
Members
Members Description
int dhcpTmo; timeout to wait for a DHCP request, seconds
int dhcpCliPort; client port for DHCP client transactions
int dhcpSrvPort; remote server port for DHCP server messages
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5.8.6.7.3.2 TCPIP_DHCP_EVENT_HANDLER Type
C
typedef void (* TCPIP_DHCP_EVENT_HANDLER)(TCPIP_NET_HANDLE hNet, TCPIP_DHCP_EVENT_TYPE evType,
const void* param);
Description
Type: TCPIP_DHCP_EVENT_HANDLER
Prototype of a DHCP event handler clients can register a handler with the DHCP service. Once an DHCP event occurs the
DHCP service will called the registered handler. The handler has to be short and fast. It is meant for setting an event flag, not for
lengthy processing!
5.8.6.7.3.3 TCPIP_DHCP_EVENT_TYPE Enumeration
C
typedef enum {
DHCP_EVENT_DISCOVER = 1,
DHCP_EVENT_BOUND,
DHCP_EVENT_LEASE_EXPIRED,
DHCP_EVENT_CONN_LOST,
DHCP_EVENT_SERVICE_DISABLED
} TCPIP_DHCP_EVENT_TYPE;
Description
Enumeration: TCPIP_DHCP_EVENT_TYPE
None
Members
Members Description
DHCP_EVENT_DISCOVER = 1 DHCP cycle started
DHCP_EVENT_BOUND DHCP lease obtained
DHCP_EVENT_LEASE_EXPIRED lease expired
DHCP_EVENT_CONN_LOST connection to the DHCP server lost, reverted to the defaultIP address
DHCP_EVENT_SERVICE_DISABLED DHCP service disabled, reverted to the defaultIP address
5.8.6.7.3.4 TCPIP_DHCP_HANDLE Type
C
typedef const void* TCPIP_DHCP_HANDLE;
Description
Type: TCPIP_DHCP_HANDLE
A handle that a client can use after the event handler has been registered.
5.8.6.8 Files
Files
Name Description
dhcp.h Dynamic Host Configuration Protocol (DHCP) Client API
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dhcp_config.h DCHP configuration file
Description
5.8.6.8.1 dhcp.h
Provides automatic IP address, subnet mask, gateway address, DNS server address, and other configuration parameters on
DHCP enabled networks.
• Reference: RFC 2131, 2132
Enumerations
Name Description
TCPIP_DHCP_EVENT_TYPE DHCP Event Type
Functions
Name Description
TCPIP_DHCP_Disable Disables the DHCP Client for the specified interface.
TCPIP_DHCP_Enable Enables the DHCP client for the specified interface.
TCPIP_DHCP_HandlerDeRegister DHCP De-Register Handler
TCPIP_DHCP_HandlerRegister DHCP Register Handler
TCPIP_DHCP_IsBound Determins if the DHCP client has an IP address lease on the specified
interface.
TCPIP_DHCP_IsEnabled Determins if the DHCP client is enabled on the specified interface.
TCPIP_DHCP_IsServerDetected Determins if the DHCP client on the specified interface has seen a DHCP
server.
TCPIP_DHCP_Renew Renews the DHCP lease for the specified interface.
TCPIP_DHCP_Request Requests the supplied IPv4 address from a DHCP server.
TCPIP_DHCP_RequestTimeoutSet DHCP Set Request Timeout
Structures
Name Description
DHCP_MODULE_CONFIG DHCP Module Configuration Typedef
Types
Name Description
TCPIP_DHCP_EVENT_HANDLER DHCP Event Handler
TCPIP_DHCP_HANDLE DHCP Handle
File Name
dhcp.h
Company
Microchip Technology Incorporated
5.8.6.8.2 dhcp_config.h
Dynamic Host Configuration Protocol (DCHP) Configuration file
This file contains the DCHP module configuration options
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Macros
Name Description
DHCP_CLIENT_ENABLED enable/disable the DHCP client at stack start up
DHCP_CLIENT_PORT UDP client local port for DHCP Client transactions
DHCP_SERVER_PORT UDP remote port for DHCP Server
DHCP_TASK_TICK_RATE 5 ms default rate
DHCP_TIMEOUT Defines how long to wait before a DHCP request times out, seconds
5.8.7 DHCP Server TCP/IP Stack Library
5.8.7.1 Introduction
DHCP Server TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the DHCP server TCP/IP Module that is available on the Microchip family of microcontrollers with
a convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The DHCP Server module is used to assign the IP address to the DHCP client from the configured IP address database.When
the server receives a request from a client, the DHCP server determines the network to which the DHCP client is connected, and
then allocates an IP address that is appropriate for the client, and sends configuration information appropriate for that
client.DHCP servers typically grant IP addresses to clients only for a limited interval. DHCP clients are responsible for renewing
their IP address before that interval has expired, and must stop using the address once the interval has expired, if they have not
been able to renew it.
5.8.7.2 Release Notes
MPLAB Harmony Version: v0.70b DHCP Serve r TCP/IP Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.7.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
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Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.7.4 Using the Library
This topic describes the basic architecture of the DHCP Server TCP/IP Stack Library and provides information and examples on
how to use it.
Interface Header File: dhcps.h
The interface to the DHCP Server TCP/IP Stack library is defined in the "dhcps.h" header file. This file is included by the "tcpip.h"
file. Any C language source (.c) file that uses the DHCP Server TCP/IP Stack library should include "tcpip.h".
Library File:
The DHCP Server TCP/IP Stack library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.7.4.1 Abstraction Model
This library provides the API of the DHCP Server TCP/IP Module that is available on the Microchip family of microcontrollers with
a convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
DHCP Server Software Abstraction Block Diagram
This module provides software abstraction of the DHCP Server module existent in any TCP/IP Stack implementation. It removes
the overhead of address resolution from all other modules in the stack.
Typical DCHP Usage
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5.8.7.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the DHCP Server module.
Library Interface Section Description
Configuration Functions Routines for Configuring DHCP server
Status Functions Routines for Obtaining DHCP Status Information
Data Types and Constants This section provides various definitions describing This
API
5.8.7.4.3 How the Library Works
To use DHCP Server, include the files dhcps.c, dhcp.c, and dhcp.h in your project, and add or uncomment the definition "#define
TCPIP_STACK_USE_DHCP_SERVER" to tcpip_config.h.
5.8.7.5 Configuring the Library
Macros
Name Description
DHCP_SERVER_GATEWAY_ADDRESS as we are in same network, Gateway address is same as
server IP address.
DHCP_SERVER_IP_ADDRESS First three octet should match to the TP address range for
Server address and the begining address should be reserved
for server address
DHCP_SERVER_NETMASK_ADDRESS Net mask value
DHCP_SERVER_PRIMARY_DNS_ADDRESS DNS Primary address
DHCP_SERVER_SECONDARY_DNS_ADDRESS DNS Secondary address
DHCPS_IP_ADDRESS_RANGE_START Address range is starting from 100, because the from 1 to 100
is reserved. Start address(192.168.100.1) should be used as
server address
DHCPS_LEASE_DURATION timeout for a solved entry in the cache, in seconds the entry
will be removed if the tmo elapsed and the entry has not been
referenced again
DHCPS_LEASE_ENTRIES_DEFAULT number of entries in the cache default number of entries per
interface
DHCPS_LEASE_REMOVED_BEFORE_ACK The entry should be removed from the entry if there is no
REQUEST after OFFER
DHCPS_LEASE_SOLVED_ENTRY_TMO timeout for a solved entry in the cache, in seconds the entry
will be removed if the tmo elapsed and the entry has not been
referenced again
DHCPS_TASK_PROCESS_RATE DHCPS task processing rate, in seconds the DHCPS module
will process a timer event with this rate for maintaining its own
queues, processing timeouts, etc.
Description
The configuration of the DHCP Server TCP/IP Stack is based on the file dhcps_config.h
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This header file contains the configuration selection for the DHCP Server TCP/IP Stack. Based on the selections made, the
DHCP Server TCP/IP Stack will support or not support selected features. These configuration settings will apply to all instances
of the DHCP Server TCP/IP Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.7.5.1 DHCP_SERVER_GATEWAY_ADDRESS Macro
C
#define DHCP_SERVER_GATEWAY_ADDRESS "192.168.100.1" // as we are in same network, Gateway
address is same as server IP address.
Description
as we are in same network, Gateway address is same as server IP address.
5.8.7.5.2 DHCP_SERVER_IP_ADDRESS Macro
C
#define DHCP_SERVER_IP_ADDRESS "192.168.100.1" // First three octet should match to the TP
address range for Server address
Description
First three octet should match to the TP address range for Server address and the begining address should be reserved for
server address
5.8.7.5.3 DHCP_SERVER_NETMASK_ADDRESS Macro
C
#define DHCP_SERVER_NETMASK_ADDRESS "255.255.255.0" // Net mask value
Description
Net mask value
5.8.7.5.4 DHCP_SERVER_PRIMARY_DNS_ADDRESS Macro
C
#define DHCP_SERVER_PRIMARY_DNS_ADDRESS "192.168.100.1" // DNS Primary address
Description
DNS Primary address
5.8.7.5.5 DHCP_SERVER_SECONDARY_DNS_ADDRESS Macro
C
#define DHCP_SERVER_SECONDARY_DNS_ADDRESS "192.168.100.1" // DNS Secondary address
Description
DNS Secondary address
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5.8.7.5.6 DHCPS_IP_ADDRESS_RANGE_START Macro
C
#define DHCPS_IP_ADDRESS_RANGE_START "192.168.100.100" // Address range is starting from 100,
because the from 1 to 100 is reserved. Start address(192.168.100.1)
Description
Address range is starting from 100, because the from 1 to 100 is reserved. Start address(192.168.100.1) should be used as
server address
5.8.7.5.7 DHCPS_LEASE_DURATION Macro
C
#define DHCPS_LEASE_DURATION DHCPS_LEASE_SOLVED_ENTRY_TMO
Description
timeout for a solved entry in the cache, in seconds the entry will be removed if the tmo elapsed and the entry has not been
referenced again
5.8.7.5.8 DHCPS_LEASE_ENTRIES_DEFAULT Macro
C
#define DHCPS_LEASE_ENTRIES_DEFAULT 15
Description
number of entries in the cache default number of entries per interface
5.8.7.5.9 DHCPS_LEASE_REMOVED_BEFORE_ACK Macro
C
#define DHCPS_LEASE_REMOVED_BEFORE_ACK (5)
Description
The entry should be removed from the entry if there is no REQUEST after OFFER
5.8.7.5.10 DHCPS_LEASE_SOLVED_ENTRY_TMO Macro
C
#define DHCPS_LEASE_SOLVED_ENTRY_TMO (20 * 60)
Description
timeout for a solved entry in the cache, in seconds the entry will be removed if the tmo elapsed and the entry has not been
referenced again
5.8.7.5.11 DHCPS_TASK_PROCESS_RATE Macro
C
#define DHCPS_TASK_PROCESS_RATE (1)
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Description
DHCPS task processing rate, in seconds the DHCPS module will process a timer event with this rate for maintaining its own
queues, processing timeouts, etc.
5.8.7.6 Building the Library
This section list the files that are available in the \src of the DHCP server. It lists which files need to be included in the build
based on either a hardware feature present on the board or configuration option selected by the system.
5.8.7.7 Library Interface
Data Types and Constants
Name Description
DHCP_SERVER_POOL_ENTRY_TYPE DHCP server pool types are used to get the leased IP address details.
DHCPS_LEASE_ENTRY listing of the leases
DHCPS_LEASE_HANDLE Lease details which is used by the CLI command prompt.
DHCPS_MODULE_CONFIG DHCP server configuration details
Configuration Functions
Name Description
TCPIP_DHCPS_Disable Disables the DHCP Server for the specified interface.
TCPIP_DHCPS_Enable Enables the DHCP Server for the specified interface.
TCPIP_DHCPS_GetPoolEntries Get all the entries or only used entries of a certain type belonging to a
network interface.
TCPIP_DHCPS_LeaseEntryGet returns a lease entry and allows iteration through the whole list of leases if
leaseHandle it starts from the begining returns a non-zero
DHCPS_LEASE_HANDLE to be used in the subsequent calls or 0 if end of
list or wrong interface, or DHCP server not running on that interface
TCPIP_DHCPS_RemovePoolEntries Removes all the entries or only used entries of a certain type belonging to a
network interface.
Status Functions
Name Description
TCPIP_DHCPS_IsEnabled Determines if the DHCP Server is enabled on the specified interface.
Description
This section describes the Application Programming Interface (API) functions of the DHCP Server TCP/IP Stack.
Refer to each section for a detailed description.
5.8.7.7.1 Configuration Functions
5.8.7.7.1.1 TCPIP_DHCPS_Disable Function
C
bool TCPIP_DHCPS_Disable(
TCPIP_NET_HANDLE hNet
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);
Description
Disables the DHCP Server for the specified interface.
Preconditions
None
Parameters
Parameters Description
pNetIf Interface to disable the DHCP Server on.
Returns
true if success false otherwise
Remarks
When the interface continues using its old configuration, it is possible that the lease may take sometime to expire. And The
communication will be there till it is not expired.Lease time is configured in dhcps_config.h.
5.8.7.7.1.2 TCPIP_DHCPS_Enable Function
C
bool TCPIP_DHCPS_Enable(
TCPIP_NET_HANDLE hNet
);
Description
Enables the DHCP Server for the specified interface, if it is disabled. If it is already enabled, nothing is done.
Preconditions
None
Parameters
Parameters Description
hNet Interface to enable the DHCP Server on.
Returns
true if success false otherwise
5.8.7.7.1.3 TCPIP_DHCPS_GetPoolEntries Function
C
int TCPIP_DHCPS_GetPoolEntries(
TCPIP_NET_HANDLE netH,
DHCP_SERVER_POOL_ENTRY_TYPE type
);
Description
This API is used to get the DHCP server entries from the pool as per DHCP_SERVER_POOL_ENTRY_TYPE.
Preconditions
DHCP server module should have been initialized
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Parameters
Parameters Description
hNet Interface handle to use
type type of entries to remove:
valid types DHCP_SERVER_POOL_ENTRY_ALL, DHCP_SERVER_POOL_ENTRY_IN_USE
Returns
true or false
Remarks
None
Example
None
5.8.7.7.1.4 TCPIP_DHCPS_LeaseEntryGet Function
C
DHCPS_LEASE_HANDLE TCPIP_DHCPS_LeaseEntryGet(
TCPIP_NET_HANDLE netH,
DHCPS_LEASE_ENTRY* pLeaseEntry,
DHCPS_LEASE_HANDLE leaseHandle
);
Description
returns a lease entry and allows iteration through the whole list of leases if leaseHandle it starts from the begining returns a
non-zero DHCPS_LEASE_HANDLE to be used in the subsequent calls or 0 if end of list or wrong interface, or DHCP server not
running on that interface
5.8.7.7.1.5 TCPIP_DHCPS_RemovePoolEntries Function
C
bool TCPIP_DHCPS_RemovePoolEntries(
TCPIP_NET_HANDLE netH,
DHCP_SERVER_POOL_ENTRY_TYPE type
);
Description
This API is used to remove the DHCP server entries from the pool as per DHCP_SERVER_POOL_ENTRY_TYPE.
Preconditions
DHCP server module should have been initialized
Parameters
Parameters Description
hNet Interface handle to use
type type of entries to remove:
valid types DHCP_SERVER_POOL_ENTRY_ALL, DHCP_SERVER_POOL_ENTRY_IN_USE
Returns
true or false
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Remarks
None
Example
None
5.8.7.7.2 Status Functions
5.8.7.7.2.1 TCPIP_DHCPS_IsEnabled Function
C
bool TCPIP_DHCPS_IsEnabled(
TCPIP_NET_HANDLE hNet
);
Description
Determines if the DHCP Server is enabled on the specified interface.
Preconditions
None
Parameters
Parameters Description
hNet Interface to query.
Returns
None
5.8.7.7.3 Data Types and Constants
5.8.7.7.3.1 DHCP_SERVER_POOL_ENTRY_TYPE Enumeration
C
typedef enum {
DHCP_SERVER_POOL_ENTRY_ALL,
DHCP_SERVER_POOL_ENTRY_IN_USE
} DHCP_SERVER_POOL_ENTRY_TYPE;
Description
DHCP server pool types are used to get the leased IP address details.
Members
Members Description
DHCP_SERVER_POOL_ENTRY_ALL Get or Remove all the Leased address . There might be a address which may not
be used.
DHCP_SERVER_POOL_ENTRY_IN_USE Get or remove only Leased IP address.
5.8.7.7.3.2 DHCPS_LEASE_ENTRY Structure
C
typedef struct {
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TCPIP_MAC_ADDR hwAdd;
IPV4_ADDR ipAddress;
uint32_t leaseTime;
} DHCPS_LEASE_ENTRY;
Description
listing of the leases
Members
Members Description
TCPIP_MAC_ADDR hwAdd; Client MAC address
IPV4_ADDR ipAddress; Leased IP address
uint32_t leaseTime; Lease period
5.8.7.7.3.3 DHCPS_LEASE_HANDLE Type
C
typedef const void* DHCPS_LEASE_HANDLE;
Description
Lease details which is used by the CLI command prompt.
5.8.7.7.3.4 DHCPS_MODULE_CONFIG Structure
C
typedef struct {
bool enabled;
bool deleteOldLease;
size_t leaseEntries;
int entrySolvedTmo;
char * startIpAddressRange;
} DHCPS_MODULE_CONFIG;
Description
DHCP server configuration details
Members
Members Description
bool enabled; enable DHCP server
bool deleteOldLease; delete old cache if still in place, specific DHCP params
size_t leaseEntries; max number of lease entries
int entrySolvedTmo; solved entry removed after this tmo if not referenced - seconds
char * startIpAddressRange; start value of the IP address for DHCP clients.
5.8.7.8 Files
Files
Name Description
dhcps.h Dynamic Host Configuration Protocol(DHCP) Server APIs.
dhcps_config.h DHCPS configuration file
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Description
5.8.7.8.1 dhcps.h
The DHCP server permanently assigns a free IP address to a requesting client from the range defined in the dhcps_config.h file.
• Reference: RFC 2131, 2132
Enumerations
Name Description
DHCP_SERVER_POOL_ENTRY_TYPE DHCP server pool types are used to get the leased IP address details.
Functions
Name Description
TCPIP_DHCPS_Disable Disables the DHCP Server for the specified interface.
TCPIP_DHCPS_Enable Enables the DHCP Server for the specified interface.
TCPIP_DHCPS_GetPoolEntries Get all the entries or only used entries of a certain type belonging to a
network interface.
TCPIP_DHCPS_IsEnabled Determines if the DHCP Server is enabled on the specified interface.
TCPIP_DHCPS_LeaseEntryGet returns a lease entry and allows iteration through the whole list of leases if
leaseHandle it starts from the begining returns a non-zero
DHCPS_LEASE_HANDLE to be used in the subsequent calls or 0 if end of
list or wrong interface, or DHCP server not running on that interface
TCPIP_DHCPS_RemovePoolEntries Removes all the entries or only used entries of a certain type belonging to a
network interface.
Structures
Name Description
DHCPS_LEASE_ENTRY listing of the leases
DHCPS_MODULE_CONFIG DHCP server configuration details
Types
Name Description
DHCPS_LEASE_HANDLE Lease details which is used by the CLI command prompt.
File Name
dhcps.h
Company
Microchip Technology Incorporated
5.8.7.8.2 dhcps_config.h
Dynamic Host Configuration Protocol (DHCPS) Configuration file
This file contains the DHCPS module configuration options
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Macros
Name Description
DHCP_SERVER_GATEWAY_ADDRESS as we are in same network, Gateway address is same as
server IP address.
DHCP_SERVER_IP_ADDRESS First three octet should match to the TP address range for
Server address and the begining address should be reserved
for server address
DHCP_SERVER_NETMASK_ADDRESS Net mask value
DHCP_SERVER_PRIMARY_DNS_ADDRESS DNS Primary address
DHCP_SERVER_SECONDARY_DNS_ADDRESS DNS Secondary address
DHCPS_IP_ADDRESS_RANGE_START Address range is starting from 100, because the from 1 to 100
is reserved. Start address(192.168.100.1) should be used as
server address
DHCPS_LEASE_DURATION timeout for a solved entry in the cache, in seconds the entry
will be removed if the tmo elapsed and the entry has not been
referenced again
DHCPS_LEASE_ENTRIES_DEFAULT number of entries in the cache default number of entries per
interface
DHCPS_LEASE_REMOVED_BEFORE_ACK The entry should be removed from the entry if there is no
REQUEST after OFFER
DHCPS_LEASE_SOLVED_ENTRY_TMO timeout for a solved entry in the cache, in seconds the entry
will be removed if the tmo elapsed and the entry has not been
referenced again
DHCPS_TASK_PROCESS_RATE DHCPS task processing rate, in seconds the DHCPS module
will process a timer event with this rate for maintaining its own
queues, processing timeouts, etc.
5.8.8 DNS TCP/IP Stack Library
5.8.8.1 Introduction
Domain Name System (DNS) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the DNS TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The Domain Name Service associates host names (such as www.microchip.com) with IP addresses (such as 10.0.54.2). The
DNS Client module provides DNS resolution capabilities to the stack.
TCP applications do not need to use the DNS module. Any necessary DNS operations can be handled by the TCPOpen
function. Applications built using UDP may need to use DNS when the IP address of the remote server is unknown.
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5.8.8.2 Release Notes
MPLAB Harmony Version: v0.70b DNS TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.8.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.8.4 Using the Library
This topic describes the basic architecture of the DNS TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: dns.h
The interface to the DNS TCP/IP Stack library is defined in the "dns.h" header file. This file is included by the "tcpip.h" file. Any C
language source (.c) file that uses the DNS TCP/IP Stack library should include "tcpip.h".
Library File:
The DNS TCP/IP Stack library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.8.4.1 Abstraction Model
This library provides the API of the DNS TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
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Description
DNS is part of the Application Layer:
DNS resolution operations follow a simple state machine, as indicated in the diagram below.
5.8.8.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the DNS module.
Library Interface Section Description
General Functions This section provides general interface routines to DNS
Data Types and Constants This section provides various definitions describing this API
5.8.8.5 Configuring the Library
Macros
Name Description
DNS_CLIENT_ARP_TMO When the DNS Client performs an ARP request for the DNS Server this
is the elapsed time after which a ARP resolution is considered to have
timed out In seconds
DNS_CLIENT_OPEN_TMO The DNS Client performs an UDP socket open request to communicate
with the DNS Server This is the elapsed time after which an open
request is considered to have timed out In seconds
DNS_CLIENT_PORT Default port for DNS resolutions
DNS_CLIENT_SERVER_TMO When the DNS Client connected to the DNS Server this is the elapsed
time after which an the communication is considered to have timed failed
if there was no reply from the server In seconds
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DNS_CLIENT_TASK_PROCESS_RATE DNS Client task processing rate, in milli-seconds the DNS Client module
will process a timer event with this rate for processing its own state
machine, etc.
DNS_CLIENT_VERSION_NO DNS Client version Depending on the version of the DNS implementation
the DNS task process will be performed differently
Description
The configuration of the DNS TCP/IP Stack is based on the file tcpip_config.h
This header file contains the configuration selection for the DNS TCP/IP Stack. Based on the selections made, the DNS TCP/IP
Stack will support or not support selected features. These configuration settings will apply to all instances of the DNS TCP/IP
Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.8.5.1 DNS_CLIENT_ARP_TMO Macro
C
#define DNS_CLIENT_ARP_TMO (1)
Description
When the DNS Client performs an ARP request for the DNS Server this is the elapsed time after which a ARP resolution is
considered to have timed out In seconds
5.8.8.5.2 DNS_CLIENT_OPEN_TMO Macro
C
#define DNS_CLIENT_OPEN_TMO (1)
Description
The DNS Client performs an UDP socket open request to communicate with the DNS Server This is the elapsed time after which
an open request is considered to have timed out In seconds
5.8.8.5.3 DNS_CLIENT_PORT Macro
C
#define DNS_CLIENT_PORT 53
Description
Default port for DNS resolutions
5.8.8.5.4 DNS_CLIENT_SERVER_TMO Macro
C
#define DNS_CLIENT_SERVER_TMO (1)
Description
When the DNS Client connected to the DNS Server this is the elapsed time after which an the communication is considered to
have timed failed if there was no reply from the server In seconds
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5.8.8.5.5 DNS_CLIENT_TASK_PROCESS_RATE Macro
C
#define DNS_CLIENT_TASK_PROCESS_RATE (500)
Description
DNS Client task processing rate, in milli-seconds the DNS Client module will process a timer event with this rate for processing
its own state machine, etc.
5.8.8.5.6 DNS_CLIENT_VERSION_NO Macro
C
#define DNS_CLIENT_VERSION_NO 1
Description
DNS Client version Depending on the version of the DNS implementation the DNS task process will be performed differently
5.8.8.6 Building the Library
This section list the files that are available in the \src of the DNS driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.8.8.7 Library Interface
Data Types and Constants
Name Description
DNS_CLIENT_MODULE_CONFIG Provides a placeholder for DNS client configuration.
DNS_RESOLVE_TYPE This enumeration provides the RecordType argument for
TCPIP_DNS_Resolve.
DNS_RESULT This enumeration provides result codes for various DNS operations.
DNS_SERVER_MODULE_CONFIG Provides a placeholder for DNS server configuration.
General Functions
Name Description
TCPIP_DNS_IsResolved Determines if the DNS resolution is complete and provides the IP.
TCPIP_DNS_Resolve Begins resolution of an address.
TCPIP_DNS_UsageBegin Claims access to the DNS module.
TCPIP_DNS_UsageEnd Releases control of the DNS module.
Description
This section describes the Application Programming Interface (API) functions of the DNS TCP/IP Stack.
Refer to each section for a detailed description.
5.8.8.7.1 General Functions
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5.8.8.7.1.1 TCPIP_DNS_IsResolved Function
C
DNS_RESULT TCPIP_DNS_IsResolved(
const char* HostName,
void* HostIP
);
Description
Call this function to determine if the DNS resolution of an address has been completed. If so, the resolved address will be
provided in HostIP.
Preconditions
TCPIP_DNS_Resolve has been called.
Parameters
Parameters Description
Hostname A pointer to the null terminated string specifiying the host for which to resolve an
IP.
HostIP A pointer to an IPV4_ADDR structure in which to store the resolved IP address
once resolution is complete.
Return Values
Return Values Description
DNS_RES_OK The DNS client has obtained an IP HostIP will contain the resolved address.
DNS_RES_PENDING The resolution process is still in progress.
DNS_RES_SERVER_TMO DNS server timed out
DNS_RES_NO_ENTRY no such entry to be resolved exists
Remarks
None.
5.8.8.7.1.2 TCPIP_DNS_Resolve Function
C
DNS_RESULT TCPIP_DNS_Resolve(
const char* HostName,
DNS_RESOLVE_TYPE Type
);
Description
This function attempts to resolve a host name to an IP address. When called, it starts the DNS state machine. Call
TCPIP_DNS_IsResolved repeatedly to determine if the resolution is complete.
Only one DNS resoultion may be executed at a time. The Hostname must not be modified in memory until the resolution is
complete.
Preconditions
TCPIP_DNS_UsageBegin returned DNS_RES_OK on a previous call.
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Parameters
Parameters Description
Hostname A pointer to the null terminated string specifiying the host for which to resolve an
IP.
RecordType DNS_TYPE_A or DNS_TYPE_MX depending on what type of record resolution is
desired.
Returns
DNS_RES_OK
Remarks
This function requires access to one UDP socket. If none are available, UDP_MAX_SOCKETS may need to be increased.
5.8.8.7.1.3 TCPIP_DNS_UsageBegin Function
C
DNS_RESULT TCPIP_DNS_UsageBegin(
TCPIP_NET_HANDLE netH
);
Description
This function acts as a semaphore to obtain usage of the DNS module. Call this function and ensure that it returns
DNS_RES_OK before calling any other DNS APIs. Call TCPIP_DNS_UsageEnd when this application no longer needs the DNS
module so that other applications may make use of it.
Preconditions
Stack is initialized.
Parameters
Parameters Description
netH interface to use If 0, a default interface will be selected
Return Values
Return Values Description
DNS_RES_OK the calling application has sucessfully taken ownership of the DNS module
DNS_RES_BUSY The DNS module is currently in use. Yield to the stack and attempt this call again
later.
Remarks
Ensure that TCPIP_DNS_UsageEnd is always called once your application has obtained control of the DNS module. If this is not
done, the stack will hang for all future applications requiring DNS access.
5.8.8.7.1.4 TCPIP_DNS_UsageEnd Function
C
DNS_RESULT TCPIP_DNS_UsageEnd(
TCPIP_NET_HANDLE netH
);
Description
This function acts as a semaphore to release control of the DNS module. Call this function when this application no longer needs
the DNS module so that other applications may make use of it.
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Preconditions
TCPIP_DNS_UsageBegin returned DNS_RES_OK on a previous call.
Parameters
Parameters Description
netH interface to release Not used.
Return Values
Return Values Description
DNS_RES_OK The DNS module successfully released.
Remarks
Ensure that TCPIP_DNS_UsageEnd is always called once your application has obtained control of the DNS module. If this is not
done, the stack will hang for all future applications requiring DNS access.
5.8.8.7.2 Data Types and Constants
5.8.8.7.2.1 DNS_CLIENT_MODULE_CONFIG Structure
C
typedef struct {
} DNS_CLIENT_MODULE_CONFIG;
Description
DNS_CLIENT_MODULE_CONFIG Structure Typedef
Provides a placeholder for DNS client configuration.
Remarks
None.
5.8.8.7.2.2 DNS_RESOLVE_TYPE Enumeration
C
typedef enum {
DNS_TYPE_A = 1,
DNS_TYPE_MX = 15,
DNS_TYPE_AAAA = 28u
} DNS_RESOLVE_TYPE;
Description
DNS_RESOLVE_TYPE Enumeration
This enumeration provides the RecordType argument for TCPIP_DNS_Resolve.
Members
Members Description
DNS_TYPE_A = 1 Constant for record type in TCPIP_DNS_Resolve. Indicates an A (standard
address) record.
DNS_TYPE_MX = 15 Constant for record type in TCPIP_DNS_Resolve. Indicates an MX (mail
exchanger) record.
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DNS_TYPE_AAAA = 28u Constant for record type in TCPIP_DNS_Resolve. Indicates a quad-A (IPv6
address) address record.
Remarks
None.
5.8.8.7.2.3 DNS_RESULT Enumeration
C
typedef enum {
DNS_RES_OK = 0,
DNS_RES_PENDING,
DNS_RES_NO_ENTRY = -1,
DNS_RES_CACHE_FULL = -2,
DNS_RES_OPEN_TMO = -3,
DNS_RES_SERVER_TMO = -4,
DNS_RES_NO_SERVICE = -5,
DNS_RES_NO_INTERFACE = -10,
DNS_RES_BUSY = -11,
DNS_RES_ARP_TMO = -12
} DNS_RESULT;
Description
DNS_RESULT Enumeration
This enumeration provides result codes for various DNS operations.
Members
Members Description
DNS_RES_OK = 0 operation succeeded
DNS_RES_PENDING operation is ongoing
DNS_RES_NO_ENTRY = -1 no such entry exists
DNS_RES_CACHE_FULL = -2 the cache is full and no entry could be
DNS_RES_OPEN_TMO = -3 DNS client couldn't get a socket
DNS_RES_SERVER_TMO = -4 DNS server response tmo
DNS_RES_NO_SERVICE = -5 DNS service not implemented
DNS_RES_NO_INTERFACE = -10 an active/requested interface could not be found
DNS_RES_BUSY = -11 module is in use by other task; retry later
DNS_RES_ARP_TMO = -12 ARP tmo
Remarks
None.
5.8.8.7.2.4 DNS_SERVER_MODULE_CONFIG Structure
C
typedef struct {
} DNS_SERVER_MODULE_CONFIG;
Description
DNS_SERVER_MODULE_CONFIG Structure Typedef
Provides a placeholder for DNS server configuration.
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Remarks
None.
5.8.8.8 Files
Files
Name Description
dns.h DNS definitions and interface file
dns_config.h DNS configuration file
Description
5.8.8.8.1 dns.h
Domain Name System (DNS) client Header file
This source file contains the DNS client module API
Enumerations
Name Description
DNS_RESOLVE_TYPE This enumeration provides the RecordType argument for TCPIP_DNS_Resolve.
DNS_RESULT This enumeration provides result codes for various DNS operations.
Functions
Name Description
TCPIP_DNS_IsResolved Determines if the DNS resolution is complete and provides the IP.
TCPIP_DNS_Resolve Begins resolution of an address.
TCPIP_DNS_UsageBegin Claims access to the DNS module.
TCPIP_DNS_UsageEnd Releases control of the DNS module.
Structures
Name Description
DNS_CLIENT_MODULE_CONFIG Provides a placeholder for DNS client configuration.
DNS_SERVER_MODULE_CONFIG Provides a placeholder for DNS server configuration.
5.8.8.8.2 dns_config.h
Domain Name Service (CNS) Configuration file
This file contains the DNS module configuration options
Macros
Name Description
DNS_CLIENT_ARP_TMO When the DNS Client performs an ARP request for the DNS Server this
is the elapsed time after which a ARP resolution is considered to have
timed out In seconds
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DNS_CLIENT_OPEN_TMO The DNS Client performs an UDP socket open request to communicate
with the DNS Server This is the elapsed time after which an open
request is considered to have timed out In seconds
DNS_CLIENT_PORT Default port for DNS resolutions
DNS_CLIENT_SERVER_TMO When the DNS Client connected to the DNS Server this is the elapsed
time after which an the communication is considered to have timed failed
if there was no reply from the server In seconds
DNS_CLIENT_TASK_PROCESS_RATE DNS Client task processing rate, in milli-seconds the DNS Client module
will process a timer event with this rate for processing its own state
machine, etc.
DNS_CLIENT_VERSION_NO DNS Client version Depending on the version of the DNS implementation
the DNS task process will be performed differently
5.8.9 Dynamic DNS TCP/IP Stack Library
5.8.9.1 Introduction
Dynamic Domain Name System (DDNS) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the DDNS TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The Dynamic DNS Client module provides a method for updating a dynamic IP address to a public DDNS service. These
services can be used to provide DNS hostname mapping to devices that behind routers, firewalls, and/or on networks that
dynamically assign IP addresses.
Note that this only solves one of the two problems for communicating to devices on local subnets from the Internet. While
Dynamic DNS can help to locate the device, the router or firewall it sits behind must still properly forward the incoming
connection request. This generally requires port forwarding to be configured for the router behind which the device is located.
The Dynamic DNS client supports the popular interface used by DynDNS.org, No-IP.com, and DNS-O-Matic.com.
IMPORTANT: The dynamic DNS services stipulate that updates should be made no more frequently than 10 minutes, and only
when the IP address has changed. Updates made more often than that are considered abusive, and may eventually cause your
account to be disabled. Production devices that get rebooted frequently may need to store the last known IP in non-volatile
memory. You also should not enable this module while testing the rest of your application.
5.8.9.2 Release Notes
MPLAB Harmony Version: v0.70b DDNS TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
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Known Issues:
Nothing to report in this release.
5.8.9.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.9.4 Using the Library
This topic describes the basic architecture of the DDNS TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: dyn_dns.h
The interface to the DDNS TCP/IP Stack library is defined in the "dyn_dns.h" header file. This file is included by the "tcpip.h" file.
Any C language source (.c) file that uses the DDNS TCP/IP Stack library should include "tcpip.h".
Library File:
The DDNS TCP/IP Stack library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.9.4.1 Abstraction Model
This library provides the API of the DDNS TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
DDNS Software Abstraction Block Diagram
Note: This diagram was not available at time of release and will be added in a future version of MPLAB Harmony.
5.8.9.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the DDNS module.
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Library Interface Section Description
Functions Routines for Configuring DDNS
Data Types and Constants This section provides various definitions describing this API
5.8.9.5 Configuring the Library
Macros
Name Description
DDNS_CHECKIP_SERVER Default CheckIP server for determining current IP address
DDNS_DEFAULT_PORT Default port for CheckIP server
Description
The configuration of the DDNS TCP/IP Stack Library is based on the file tcpip_config.h
This header file contains the configuration selection for the DDNS TCP/IP Stack Library. Based on the selections made, the
DDNS TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all instances
of the DDNS TCP/IP Stack Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.9.5.1 DDNS_CHECKIP_SERVER Macro
C
#define DDNS_CHECKIP_SERVER (const uint8_t*)"checkip.dyndns.com"
Description
Default CheckIP server for determining current IP address
5.8.9.5.2 DDNS_DEFAULT_PORT Macro
C
#define DDNS_DEFAULT_PORT (80u)
Description
Default port for CheckIP server
5.8.9.6 Building the Library
This section list the files that are available in the \src of the DDNS driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
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5.8.9.7 Library Interface
Data Types and Constants
Name Description
DDNS_MODULE_CONFIG This is type DDNS_MODULE_CONFIG.
DDNS_POINTERS Configuration parameters for the Dynamic DNS Client
DDNS_SERVICES Dynamic DNS Services. Must support the DynDNS API (Auxlang) and correspond
to ddnsServiceHosts and ddnsServicePorts in DynDNS.c.
DDNS_STATUS Status message for DynDNS client. GOOD and NOCHG are ok, but ABUSE
through 911 are fatal. UNCHANGED through INVALID are locally defined.
Functions
Name Description
TCPIP_DDNS_LastIPGet Returns the status of the most recent update.
TCPIP_DDNS_LastStatusGet Returns the last known external IP address of the device.
TCPIP_DDNS_ServiceSet Selects a pre-configured Dynamic DNS service
TCPIP_DDNS_UpdateForce Forces an immediate DDNS update
Description
This section describes the Application Programming Interface (API) functions of the DDNS TCP/IP Stack.
Refer to each section for a detailed description.
5.8.9.7.1 Functions
5.8.9.7.1.1 TCPIP_DDNS_LastIPGet Function
C
IPV4_ADDR TCPIP_DDNS_LastIPGet();
Description
This function returns the status of the most recent update. See the DDNS_STATUS enumeration for possible codes.
Preconditions
None
Returns
DDNS_STATUS indicating the status code for the most recent update.
5.8.9.7.1.2 TCPIP_DDNS_LastStatusGet Function
C
DDNS_STATUS TCPIP_DDNS_LastStatusGet();
Description
This function returns the last known external IP address of the device.
Preconditions
None
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Returns
The last known external IP address of the device.
5.8.9.7.1.3 TCPIP_DDNS_ServiceSet Function
C
void TCPIP_DDNS_ServiceSet(
DDNS_SERVICES svc
);
Description
This function selects a Dynamic DNS service based on parameters configured in ddnsServiceHosts and ddnsServicePorts.
These arrays must match the DDNS_SERVICES enumeration.
Preconditions
None
Parameters
Parameters Description
svc one of the DDNS_SERVICES elements to indicate the selected service
Returns
None
5.8.9.7.1.4 TCPIP_DDNS_UpdateForce Function
C
void TCPIP_DDNS_UpdateForce();
Description
This function forces the DDNS Client to execute a full update immediately. Any error message is cleared, and the update will be
executed whether the IP address has changed or not. Call this function every time the DDNSClient parameters have been
modified.
Preconditions
TCPIP_DDNS_Initialize must have been called.
Returns
None
5.8.9.7.2 Data Types and Constants
5.8.9.7.2.1 DDNS_MODULE_CONFIG Structure
C
typedef struct {
} DDNS_MODULE_CONFIG;
Description
This is type DDNS_MODULE_CONFIG.
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5.8.9.7.2.2 DDNS_POINTERS Structure
C
typedef struct {
union {
uint8_t * szRAM;
const uint8_t * szROM;
} CheckIPServer;
uint16_t CheckIPPort;
union {
uint8_t * szRAM;
const uint8_t * szROM;
} UpdateServer;
uint16_t UpdatePort;
union {
uint8_t * szRAM;
const uint8_t * szROM;
} Username;
union {
uint8_t * szRAM;
const uint8_t * szROM;
} Password;
union {
uint8_t * szRAM;
const uint8_t * szROM;
} Host;
struct {
unsigned char CheckIPServer : 1;
unsigned char UpdateServer : 1;
unsigned char Username : 1;
unsigned char Password : 1;
unsigned char Host : 1;
} ROMPointers;
} DDNS_POINTERS;
Description
This structure of pointers configures the Dynamic DNS Client. Initially, all pointers will be null and the client will be disabled. Set
DDNSClient.[field name].szRAM to use a string stored in RAM, or DDNSClient.[field name].szROM to use a string
stored in const. (Where [field name] is one of the parameters below.)
If a const string is specified, DDNSClient.ROMPointers.[field name] must also be set to 1 to indicate that this field
should be retrieved from const instead of RAM.
Parameters
Parameters Description
CheckIPServer The server used to determine the external IP address
CheckIPPort Port on the above server to connect to
UpdateServer The server where updates should be posted
UpdatePort Port on the above server to connect to
Username The user name for the dynamic DNS server
Password The password to supply when making updates
Host The host name you wish to update
ROMPointers Indicates which parameters to read from const instead of RAM.
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5.8.9.7.2.3 DDNS_SERVICES Enumeration
C
typedef enum {
DYNDNS_ORG = 0u,
NO_IP_COM,
DNSOMATIC_COM
} DDNS_SERVICES;
Description
Dynamic DNS Services. Must support the DynDNS API (Auxlang) and correspond to ddnsServiceHosts and ddnsServicePorts in
DynDNS.c.
Members
Members Description
DYNDNS_ORG = 0u www.dyndns.org
NO_IP_COM www.no-ip.com
DNSOMATIC_COM www.dnsomatic.com
5.8.9.7.2.4 DDNS_STATUS Enumeration
C
typedef enum {
DDNS_STATUS_GOOD = 0u,
DDNS_STATUS_NOCHG,
DDNS_STATUS_ABUSE,
DDNS_STATUS_BADSYS,
DDNS_STATUS_BADAGENT,
DDNS_STATUS_BADAUTH,
DDNS_STATUS_NOT_DONATOR,
DDNS_STATUS_NOT_FQDN,
DDNS_STATUS_NOHOST,
DDNS_STATUS_NOT_YOURS,
DDNS_STATUS_NUMHOST,
DDNS_STATUS_DNSERR,
DDNS_STATUS_911,
DDNS_STATUS_UPDATE_ERROR,
DDNS_STATUS_UNCHANGED,
DDNS_STATUS_CHECKIP_ERROR,
DDNS_STATUS_DNS_ERROR,
DDNS_STATUS_SKT_ERROR,
DDNS_STATUS_INVALID,
DDNS_STATUS_UNKNOWN
} DDNS_STATUS;
Description
Status message for DynDNS client. GOOD and NOCHG are ok, but ABUSE through 911 are fatal. UNCHANGED through
INVALID are locally defined.
Members
Members Description
DDNS_STATUS_GOOD = 0u Update successful, hostname is now updated
DDNS_STATUS_NOCHG Update changed no setting and is considered abusive. Additional 'nochg' updates
will cause hostname to be blocked.
DDNS_STATUS_ABUSE The hostname specified is blocked for update abuse.
DDNS_STATUS_BADSYS System parameter not valid. Should be dyndns, statdns or custom.
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DDNS_STATUS_BADAGENT The user agent was blocked or not sent.
DDNS_STATUS_BADAUTH The username and password pair do not match a real user.
DDNS_STATUS_NOT_DONATOR An option available only to credited users (such as offline URL) was specified, but
the user is not a credited user. If multiple hosts were specified, only a single
!donator will be returned.
DDNS_STATUS_NOT_FQDN The hostname specified is not a fully-qualified domain name (not in the form
hostname.dyndns.org or domain.com).
DDNS_STATUS_NOHOST The hostname specified does not exist in this user account (or is not in the service
specified in the system parameter).
DDNS_STATUS_NOT_YOURS The hostname specified does not belong to this user account.
DDNS_STATUS_NUMHOST Too many hosts specified in an update.
DDNS_STATUS_DNSERR Unspecified DNS error encountered by the DDNS service.
DDNS_STATUS_911 There is a problem or scheduled maintenance with the DDNS service.
DDNS_STATUS_UPDATE_ERROR Error communicating with Update service.
DDNS_STATUS_UNCHANGED The IP Check indicated that no update was necessary.
DDNS_STATUS_CHECKIP_ERROR Error communicating with CheckIP service.
DDNS_STATUS_DNS_ERROR DNS error resolving the CheckIP service.
DDNS_STATUS_SKT_ERROR TCP socket opening error
DDNS_STATUS_INVALID DDNS Client data is not valid.
DDNS_STATUS_UNKNOWN DDNS client has not yet been executed with this configuration.
5.8.9.8 Files
Files
Name Description
ddns.h
ddns_config.h DynDNS configuration file
Description
5.8.9.8.1 ddns.h
DynDNS Headers for Microchip TCP/IP Stack
Enumerations
Name Description
DDNS_SERVICES Dynamic DNS Services. Must support the DynDNS API (Auxlang) and correspond
to ddnsServiceHosts and ddnsServicePorts in DynDNS.c.
DDNS_STATUS Status message for DynDNS client. GOOD and NOCHG are ok, but ABUSE
through 911 are fatal. UNCHANGED through INVALID are locally defined.
Functions
Name Description
TCPIP_DDNS_LastIPGet Returns the status of the most recent update.
TCPIP_DDNS_LastStatusGet Returns the last known external IP address of the device.
TCPIP_DDNS_ServiceSet Selects a pre-configured Dynamic DNS service
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TCPIP_DDNS_UpdateForce Forces an immediate DDNS update
Structures
Name Description
DDNS_MODULE_CONFIG This is type DDNS_MODULE_CONFIG.
DDNS_POINTERS Configuration parameters for the Dynamic DNS Client
5.8.9.8.2 ddns_config.h
Dynamic Domain Name Service (DynDNS) Configuration file
This file contains the DynDNS module configuration options
Macros
Name Description
DDNS_CHECKIP_SERVER Default CheckIP server for determining current IP address
DDNS_DEFAULT_PORT Default port for CheckIP server
5.8.10 FTP TCP/IP Stack Library
5.8.10.1 Introduction
File Transfer Protocol (FTP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the FTP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
An embedded FTP (File Transfer Protocol) server is an excellent addition to any network-enabled device. FTP server capability
facilitates the uploading of files to, and downloading of files from, an embedded device. Almost all computers have, at the very
least, a command line FTP client that will allow a user to connect to an embedded FTP server.
5.8.10.2 Release Notes
MPLAB Harmony Version: v0.70b FTP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
The FTP server provided here with these following functionalities. You can easily add new functionality as required.
The FTP server presented here incorporates the following features:
• Server Works with both Passive and Active mode
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• FTP Server APIs are compatible with PIC24
• FTP connection is authenticated by using username as "admin" and password "microchip". Anonymous login is provided
• GET, MGET, PUT, and MPUT commands are provided
Known Issues:
None to report at this time.
5.8.10.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.10.4 Using the Library
This topic describes the basic architecture of the FTP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: ftp.h
The interface to the FTP TCP/IP Stack library is defined in the "ftp.h" header file. This file is included by the "tcpip.h" file. Any C
language source (.c) file that uses the FTP TCP/IP Stack library should include "tcpip.h".
Library File:
The FTP TCP/IP Stack library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.10.4.1 Abstraction Model
This library provides the API of the FTP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
FTP Server Dependencies
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Since FTP server requires the use of TCP/IP stack and a file system which can be a MPFS or MDD , it also inherits the program
memory and RAM requirements of those as well.
5.8.10.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the FTP module.
Library Interface Section Description
Data Types and Constants This section provides various definitions describing This API
5.8.10.5 Configuring the Library
Macros
Name Description
TCPIP_FTP_DATA_SKT_RX_BUFF_SIZE Define the size of the RX buffer for the FTP Data socket Use 0 for
default
TCPIP_FTP_DATA_SKT_TX_BUFF_SIZE Define the size of the TX buffer for the FTP Data socket Use 0 for
default
TCPIP_FTP_MAX_CONNECTIONS Maximum number of FTP connections allowed per interface
TCPIP_FTP_PASSWD_LEN Specifies the max length of FTP login password
TCPIP_FTP_PUT_ENABLED Comment this line out to disable MPFS
TCPIP_FTP_USER_NAME_LEN Specifies the max length for user name
Description
The configuration of the FTP TCP/IP Stack is based on the file tcpip_config.h
This header file contains the configuration selection for the FTP TCP/IP Stack. Based on the selections made, the FTP TCP/IP
Stack will support or not support selected features. These configuration settings will apply to all instances of the FTP TCP/IP
Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.10.5.1 TCPIP_FTP_DATA_SKT_RX_BUFF_SIZE Macro
C
#define TCPIP_FTP_DATA_SKT_RX_BUFF_SIZE 0
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Description
Define the size of the RX buffer for the FTP Data socket Use 0 for default
5.8.10.5.2 TCPIP_FTP_DATA_SKT_TX_BUFF_SIZE Macro
C
#define TCPIP_FTP_DATA_SKT_TX_BUFF_SIZE 0
Description
Define the size of the TX buffer for the FTP Data socket Use 0 for default
5.8.10.5.3 TCPIP_FTP_MAX_CONNECTIONS Macro
C
#define TCPIP_FTP_MAX_CONNECTIONS (1)
Description
Maximum number of FTP connections allowed per interface
5.8.10.5.4 TCPIP_FTP_PASSWD_LEN Macro
C
#define TCPIP_FTP_PASSWD_LEN (10)
Description
Specifies the max length of FTP login password
5.8.10.5.5 TCPIP_FTP_PUT_ENABLED Macro
C
#define TCPIP_FTP_PUT_ENABLED
Description
Comment this line out to disable MPFS
5.8.10.5.6 TCPIP_FTP_USER_NAME_LEN Macro
C
#define TCPIP_FTP_USER_NAME_LEN (10)
Description
Specifies the max length for user name
5.8.10.6 Building the Library
This section list the files that are available in the \src of the FTP driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
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5.8.10.7 Library Interface
Data Types and Constants
Name Description
FTP_MODULE_CONFIG FTP module dynamic configuration data
Description
This section describes the Application Programming Interface (API) functions of the FTP TCP/IP Stack.
Refer to each section for a detailed description.
5.8.10.7.1 Data Types and Constants
5.8.10.7.1.1 FTP_MODULE_CONFIG Structure
C
typedef struct {
uint16_t dataSktTxBuffSize;
uint16_t dataSktRxBuffSize;
uint8_t userName[10+1];
uint8_t password[10+1];
} FTP_MODULE_CONFIG;
Description
FTP module dynamic configuration data
Members
Members Description
uint16_t dataSktTxBuffSize; size of Data socket TX buffer for the associatted socket; leave 0 for default
uint16_t dataSktRxBuffSize; size of Data Socket RX buffer for the associatted socket; leave 0 for default
uint8_t userName[10+1]; FTP login User name TCPIP_FTP_USER_NAME_LEN
uint8_t password[10+1]; FTP login password TCPIP_FTP_PASSWD_LEN
5.8.10.8 Files
Files
Name Description
ftp.h
ftp_config.h FTP configuration file
Description
5.8.10.8.1 ftp.h
FTP Server Defs for Microchip TCP/IP Stack
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Structures
Name Description
FTP_MODULE_CONFIG FTP module dynamic configuration data
5.8.10.8.2 ftp_config.h
File Transfer Protocol (FTP) Configuration file
This file contains the FTP module configuration options
Macros
Name Description
TCPIP_FTP_DATA_SKT_RX_BUFF_SIZE Define the size of the RX buffer for the FTP Data socket Use 0 for
default
TCPIP_FTP_DATA_SKT_TX_BUFF_SIZE Define the size of the TX buffer for the FTP Data socket Use 0 for
default
TCPIP_FTP_MAX_CONNECTIONS Maximum number of FTP connections allowed per interface
TCPIP_FTP_PASSWD_LEN Specifies the max length of FTP login password
TCPIP_FTP_PUT_ENABLED Comment this line out to disable MPFS
TCPIP_FTP_USER_NAME_LEN Specifies the max length for user name
5.8.11 HTTP Server TCP/IP Stack Library
5.8.11.1 Introduction
Hypertext Transfer Protocol (HTTP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the HTTP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The HTTP web server module and its associated MPFS2 file system module allow the board to act as a web server. This
facilitates an easy method to view status information and control applications using any standard web browser.
5.8.11.2 Release Notes
MPLAB Harmony Version: v0.70b HTTP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
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Known Issues:
Nothing to report in this release.
5.8.11.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.11.4 Using the Library
This topic describes the basic architecture of the HTTP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: http.h
The interface to the HTTP TCP/IP Stack library is defined in the "http.h" header file. This file is included by the "tcpip.h" file. Any
C language source (.c) file that uses the HTTP TCP/IP Stack library should include "tcpip.h".
Library File:
The HTTP TCPIP Stack library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.11.4.1 Abstraction Model
This library provides the API of the HTTP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
HTTP Software Abstraction Block Diagram
Three main components are necessary to understand how the HTTP web server works: the web pages, the MPFS2 Utility,
and the source files CustomHTTPApp.c and HTTPPrint.h. An overview of the entire process is shown below.
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Web Pages
This includes all the HTML and associated images, CSS stylesheets, and JavaScript files necessary to display the website.
A sample application including all these components is located in the WebPages2 folder.
MPFS2 Utility
This program, supplied by Microchip, packages the web pages into a format that can be efficiently stored in either external
non-volatile storage, or internal flash program memory. This program also indexes dynamic variables found in the web
pages and updates HTTPPrint.h with these indices.
If external storage is being used, the MPFS2 Utility outputs a BIN file and can upload that file directly to the board. If the data
5.8.11.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the HTTP module.
Library Interface Section Description
Functions Routines for Configuring DHCP
Data Types and Constants This section provides various definitions describing this API
5.8.11.5 Configuring the Library
Macros
Name Description
HTTP_CACHE_LEN Max lifetime (sec) of static responses as string
HTTP_CONFIG_FLAGS Define the HTTP module configuration flags Use 0 for default
HTTP_DEFAULT_FILE Indicate what file to serve when no specific one is requested
HTTP_DEFAULT_LEN For buffer overrun protection. Set to longest length of above two strings.
HTTP_FILE_UPLOAD Configure MPFS over HTTP updating Comment this line to disable
updating via HTTP
HTTP_MAX_CONNECTIONS Maximum numbers of simultaneous supported HTTP connections.
HTTP_MAX_DATA_LEN Define the maximum data length for reading cookie and GET/POST
arguments (bytes)
HTTP_MAX_HEADER_LEN Set to length of longest string above
HTTP_MIN_CALLBACK_FREE Define the minimum number of bytes free in the TX FIFO before
executing callbacks
HTTP_PORT Define the listening port for the HTTP server
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HTTP_SKT_RX_BUFF_SIZE Define the size of the RX buffer for the http socket Use 0 for default
HTTP_SKT_TX_BUFF_SIZE Define the size of the TX buffer for the http socket Use 0 for default
HTTP_SSL_ONLY_CHAR Files beginning with this character will only be served over HTTPS Set
to 0x00 to require for all files Set to 0xff to require for no files
HTTP_TIMEOUT Max time (sec) to await more data before timing out and disconnecting
the socket
HTTP_USE_AUTHENTICATION Enable basic authentication support
HTTP_USE_COOKIES Enable cookie support
HTTP_USE_POST Define which HTTP modules to use If not using a specific module,
comment it to save resources Enable POST support
HTTPS_DEFAULT_FILE Indicate what file to serve when no specific one is requested
HTTPS_PORT Listening port for HTTPS server (when SSL enabled)
TCPIP_STACK_USE_BASE64_DECODE TCPIP_STACK_USE_BASE64_DECODE
HTTP_USE_AUTHENTICATION
Description
The configuration of the HTTP TCP/IP Stack is based on the file tcpip_config.h
This header file contains the configuration selection for the HTTP TCP/IP Stack. Based on the selections made, the HTTP
TCP/IP Stack will support or not support selected features. These configuration settings will apply to all instances of the HTTP
TCP/IP Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.11.5.1 HTTP_CACHE_LEN Macro
C
#define HTTP_CACHE_LEN ("600")
Description
Max lifetime (sec) of static responses as string
5.8.11.5.2 HTTP_CONFIG_FLAGS Macro
C
#define HTTP_CONFIG_FLAGS 0
Description
Define the HTTP module configuration flags Use 0 for default
5.8.11.5.3 HTTP_DEFAULT_FILE Macro
C
#define HTTP_DEFAULT_FILE "index.htm"
Description
Indicate what file to serve when no specific one is requested
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5.8.11.5.4 HTTP_DEFAULT_LEN Macro
C
#define HTTP_DEFAULT_LEN (10u)
Description
For buffer overrun protection. Set to longest length of above two strings.
5.8.11.5.5 HTTP_FILE_UPLOAD Macro
C
#define HTTP_FILE_UPLOAD "mpfsupload"
Description
Configure MPFS over HTTP updating Comment this line to disable updating via HTTP
5.8.11.5.6 HTTP_MAX_CONNECTIONS Macro
C
#define HTTP_MAX_CONNECTIONS (4)
Description
Maximum numbers of simultaneous supported HTTP connections.
5.8.11.5.7 HTTP_MAX_DATA_LEN Macro
C
#define HTTP_MAX_DATA_LEN (100u)
Description
Define the maximum data length for reading cookie and GET/POST arguments (bytes)
5.8.11.5.8 HTTP_MAX_HEADER_LEN Macro
C
#define HTTP_MAX_HEADER_LEN (15u)
Description
Set to length of longest string above
5.8.11.5.9 HTTP_MIN_CALLBACK_FREE Macro
C
#define HTTP_MIN_CALLBACK_FREE (16u)
Description
Define the minimum number of bytes free in the TX FIFO before executing callbacks
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5.8.11.5.10 HTTP_PORT Macro
C
#define HTTP_PORT (80u)
Description
Define the listening port for the HTTP server
5.8.11.5.11 HTTP_SKT_RX_BUFF_SIZE Macro
C
#define HTTP_SKT_RX_BUFF_SIZE 0
Description
Define the size of the RX buffer for the http socket Use 0 for default
5.8.11.5.12 HTTP_SKT_TX_BUFF_SIZE Macro
C
#define HTTP_SKT_TX_BUFF_SIZE 0
Description
Define the size of the TX buffer for the http socket Use 0 for default
5.8.11.5.13 HTTP_SSL_ONLY_CHAR Macro
C
#define HTTP_SSL_ONLY_CHAR (0xFF)
Description
Files beginning with this character will only be served over HTTPS Set to 0x00 to require for all files Set to 0xff to require for no
files
5.8.11.5.14 HTTP_TIMEOUT Macro
C
#define HTTP_TIMEOUT (45u)
Description
Max time (sec) to await more data before timing out and disconnecting the socket
5.8.11.5.15 HTTP_USE_AUTHENTICATION Macro
C
#define HTTP_USE_AUTHENTICATION
Description
Enable basic authentication support
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5.8.11.5.16 HTTP_USE_COOKIES Macro
C
#define HTTP_USE_COOKIES
Description
Enable cookie support
5.8.11.5.17 HTTP_USE_POST Macro
C
#define HTTP_USE_POST
Description
Define which HTTP modules to use If not using a specific module, comment it to save resources Enable POST support
5.8.11.5.18 HTTPS_DEFAULT_FILE Macro
C
#define HTTPS_DEFAULT_FILE "index.htm"
Description
Indicate what file to serve when no specific one is requested
5.8.11.5.19 HTTPS_PORT Macro
C
#define HTTPS_PORT (443u)
Description
Listening port for HTTPS server (when SSL enabled)
5.8.11.5.20 TCPIP_STACK_USE_BASE64_DECODE Macro
C
#define TCPIP_STACK_USE_BASE64_DECODE
Description
TCPIP_STACK_USE_BASE64_DECODE HTTP_USE_AUTHENTICATION
5.8.11.6 Library Interface
Data Types and Constants
Name Description
HTTP_CONN_HANDLE HTTP connection identifier, handle of a HTTP connection
HTTP_FILE_TYPE File type definitions
HTTP_IO_RESULT Result states for execution callbacks
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HTTP_MODULE_CONFIG HTTP module dynamic configuration data
HTTP_MODULE_FLAGS HTTP module configuration flags
HTTP_READ_STATUS Result states for HTTPPostReadName and HTTPPostReadValue
HTTP_STATUS Supported Commands and Server Response Codes
HTTPReadPostPair Reads a name and value pair from a URL encoded string in the TCP buffer.
Functions
Name Description
TCPIP_HTTP_ActiveConnectionCountGet Gets the number of active connections.
TCPIP_HTTP_ArgGet Locates a form field value in a given data array.
TCPIP_HTTP_CurrentConnectionByteCountDec Decrements byte count.
TCPIP_HTTP_CurrentConnectionByteCountGet Returns how many bytes have been read so far
TCPIP_HTTP_CurrentConnectionByteCountSet Sets how many bytes have been read so far
TCPIP_HTTP_CurrentConnectionCallbackPosGet Returns the callback position indicator.
TCPIP_HTTP_CurrentConnectionCallbackPosSet Sets the callback position indicator.
TCPIP_HTTP_CurrentConnectionDataBufferGet Returns pointer to connection general purpose data buffer.
TCPIP_HTTP_CurrentConnectionFileGet Get handle to current connection's file.
TCPIP_HTTP_CurrentConnectionHasArgsSet Sets whether there are get or cookie arguments
TCPIP_HTTP_CurrentConnectionIsAuthorizedGet Get the authorized state for the current connection.
TCPIP_HTTP_CurrentConnectionIsAuthorizedSet Sets the authorized state for the current connection.
TCPIP_HTTP_CurrentConnectionPostSmGet Get the POST state machine state.
TCPIP_HTTP_CurrentConnectionPostSmSet Set the POST state machine state.
TCPIP_HTTP_CurrentConnectionSocketGet Get the socket for the current connection.
TCPIP_HTTP_CurrentConnectionStatusSet Sets HTTP status.
TCPIP_HTTP_CurrentConnectionUserDataGet Gets the user data parameter for the current connection.
TCPIP_HTTP_CurrentConnectionUserDataSet Sets the user data parameter for the current connection.
TCPIP_HTTP_FileInclude Writes a file byte-for-byte to the currently loaded TCP socket.
TCPIP_HTTP_PostNameRead Reads a name from a URL encoded string in the TCP buffer.
TCPIP_HTTP_PostValueRead Reads a value from a URL encoded string in the TCP buffer.
TCPIP_HTTP_URLDecode Parses a string from URL encoding to plain-text.
HTTPCheckAuth Performs validation on a specific user name and password.
HTTPExecuteGet Processes GET form field variables and cookies.
HTTPExecutePost Processes POST form variables and data.
HTTPNeedsAuth Determines if a given file name requires authentication
HTTPPrint_varname Inserts dynamic content into a web page
Description
This section describes the Application Programming Interface (API) functions of the HTTP TCP/IP Stack.
Refer to each section for a detailed description.
5.8.11.6.1 Functions
5.8.11.6.1.1 TCPIP_HTTP_ActiveConnectionCountGet Function
C
int TCPIP_HTTP_ActiveConnectionCountGet();
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Description
Returns the number of active conenctions at the current time.
Preconditions
None
Remarks
The value returned by this function is informational only. The number of active connections changes dynamically.
Example
int nConns;
nConns = TCPIP_HTTP_ActiveConnectionCountGet();
5.8.11.6.1.2 TCPIP_HTTP_ArgGet Function
C
const uint8_t* TCPIP_HTTP_ArgGet(
const uint8_t* cData,
const uint8_t* cArg
);
Description
Searches through a data array to find the value associated with a given argument. It can be used to find form field values in data
received over GET or POST.
The end of data is assumed to be reached when a null name parameter is encountered. This requires the string to have an even
number of null-terminated strings, followed by an additional null terminator.
Preconditions
The data array has a valid series of null terminated name/value pairs.
Parameters
Parameters Description
data the buffer to search
arg the name of the argument to find
Returns
A pointer to the argument value, or NULL if not found.
Remarks
None.
Example
void HTTPPrint_cookiename(HTTP_CONN_HANDLE connHandle)
{
const uint8_t *ptr;
TCP_SOCKET sktHTTP;
ptr = TCPIP_HTTP_ArgGet(TCPIP_HTTP_CurrentConnectionDataBufferGet(connHandle), (const
uint8_t*)"name");
sktHTTP = TCPIP_HTTP_CurrentConnectionSocketGet(connHandle);
if(ptr)
TCPIP_TCP_StringPut(sktHTTP, ptr);
else
TCPIP_TCP_StringPut(sktHTTP, (const uint8_t*)"not set");
}
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5.8.11.6.1.3 TCPIP_HTTP_CurrentConnectionByteCountDec Function
C
void TCPIP_HTTP_CurrentConnectionByteCountDec(
HTTP_CONN_HANDLE connHandle,
uint32_t byteCount
);
Description
Decrements byte count.
Preconditions
None.
Parameters
Parameters Description
connHandle HTTP connection handle
byteCount byte count reduction
Remarks
None.
Example
5.8.11.6.1.4 TCPIP_HTTP_CurrentConnectionByteCountGet Function
C
uint32_t TCPIP_HTTP_CurrentConnectionByteCountGet(
HTTP_CONN_HANDLE connHandle
);
Description
Returns how many bytes have been read so far
Preconditions
None.
Parameters
Parameters Description
connHandle HTTP connection handle
Remarks
None.
Example
switch(TCPIP_HTTP_CurrentConnectionPostSmGet(connHandle))
{
case SM_CFG_SNMP_READ_NAME:
// If all parameters have been read, end
if(TCPIP_HTTP_CurrentConnectionByteCountGet(connHandle) == 0u)
{
return HTTP_IO_DONE;
}
.
.
.
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}
5.8.11.6.1.5 TCPIP_HTTP_CurrentConnectionByteCountSet Function
C
void TCPIP_HTTP_CurrentConnectionByteCountSet(
HTTP_CONN_HANDLE connHandle,
uint32_t byteCount
);
Description
Sets how many bytes have been read so far
Parameters
Parameters Description
connHandle HTTP connection handle
byteCount byte count to be set
Remarks
None.
Example
5.8.11.6.1.6 TCPIP_HTTP_CurrentConnectionCallbackPosGet Function
C
uint32_t TCPIP_HTTP_CurrentConnectionCallbackPosGet(
HTTP_CONN_HANDLE connHandle
);
Description
Returns the callback position indicator for connection defined by connHandle.
Preconditions
None.
Parameters
Parameters Description
connHandle HTTP connection handle
Remarks
None.
Example
uint32_t callbackPos;
callbackPos = TCPIP_HTTP_CurrentConnectionCallbackPosGet(connHandle);
if(callbackPos == 0x00u)
callbackPos = (uint32_t)DDNSClient.Host.szRAM;
callbackPos =
(uint32_t)TCPIP_TCP_StringPut(TCPIP_HTTP_CurrentConnectionSocketGet(connHandle),
(uint8_t*)callbackPos);
if(*(uint8_t*)callbackPos == '0')
callbackPos = 0x00;
TCPIP_HTTP_CurrentConnectionCallbackPosSet(connHandle, callbackPos);
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5.8.11.6.1.7 TCPIP_HTTP_CurrentConnectionCallbackPosSet Function
C
void TCPIP_HTTP_CurrentConnectionCallbackPosSet(
HTTP_CONN_HANDLE connHandle,
uint32_t
);
Description
Sets the callback position indicator for connection defined by connHandle.
Preconditions
None.
Parameters
Parameters Description
connHandle HTTP connection handle
Remarks
None.
Example
void HTTPPrint_builddate(HTTP_CONN_HANDLE connHandle)
{
TCP_SOCKET sktHTTP;
sktHTTP = TCPIP_HTTP_CurrentConnectionSocketGet(connHandle);
TCPIP_HTTP_CurrentConnectionCallbackPosSet(connHandle, 0x01);
if(TCPIP_TCP_PutIsReady(sktHTTP) < strlen((const char*)__DATE__" "__TIME__))
{ // Don't have room to output build date and time
return;
}
TCPIP_HTTP_CurrentConnectionCallbackPosSet(connHandle, 0x00);
TCPIP_TCP_StringPut(sktHTTP, (const void*)__DATE__" "__TIME__);
}
5.8.11.6.1.8 TCPIP_HTTP_CurrentConnectionDataBufferGet Function
C
uint8_t* TCPIP_HTTP_CurrentConnectionDataBufferGet(
HTTP_CONN_HANDLE connHandle
);
Description
Returns pointer to connection general purpose data buffer.
Preconditions
None.
Parameters
Parameters Description
connHandle HTTP connection handle
Remarks
None.
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Example
void HTTPPrint_cookiename(HTTP_CONN_HANDLE connHandle)
{
const uint8_t *ptr;
TCP_SOCKET sktHTTP;
ptr = TCPIP_HTTP_ArgGet(TCPIP_HTTP_CurrentConnectionDataBufferGet(connHandle), (const
uint8_t*)"name");
sktHTTP = TCPIP_HTTP_CurrentConnectionSocketGet(connHandle);
if(ptr)
TCPIP_TCP_StringPut(sktHTTP, ptr);
else
TCPIP_TCP_StringPut(sktHTTP, (const uint8_t*)"not set");
}
5.8.11.6.1.9 TCPIP_HTTP_CurrentConnectionFileGet Function
C
FILE_HANDLE TCPIP_HTTP_CurrentConnectionFileGet(
HTTP_CONN_HANDLE connHandle
);
Description
Get handle to current connection's file.
Preconditions
None.
Parameters
Parameters Description
connHandle HTTP connection handle
Remarks
None.
Example
uint8_t filename[20];
// Load the file name
// Make sure uint8_t filename[] above is large enough for your longest name
MPFSGetFilename(TCPIP_HTTP_CurrentConnectionFileGet(connHandle), filename, 20);
5.8.11.6.1.10 TCPIP_HTTP_CurrentConnectionHasArgsSet Function
C
void TCPIP_HTTP_CurrentConnectionHasArgsSet(
HTTP_CONN_HANDLE connHandle,
bool args
);
Description
Sets whether there are get or cookie arguments
Preconditions
None.
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Parameters
Parameters Description
connHandle HTTP connection handle
args boolean if there arguments or not
Remarks
None.
Example
else if(!memcmp(filename, "cookies.htm", 11))
{ // If it's the LED updater file
TCPIP_HTTP_CurrentConnectionHasArgsSet(connHandle, true);
}
5.8.11.6.1.11 TCPIP_HTTP_CurrentConnectionIsAuthorizedGet Function
C
uint8_t TCPIP_HTTP_CurrentConnectionIsAuthorizedGet(
HTTP_CONN_HANDLE connHandle
);
Description
Get the authorization status for the current connection.
Preconditions
None
Parameters
Parameters Description
connHandle HTTP connection handle
Remarks
None.
Example
uint8_t isAuth;
isAuth = TCPIP_HTTP_CurrentConnectionIsAuthorizedGet(connHandle);
5.8.11.6.1.12 TCPIP_HTTP_CurrentConnectionIsAuthorizedSet Function
C
void TCPIP_HTTP_CurrentConnectionIsAuthorizedSet(
HTTP_CONN_HANDLE connHandle,
uint8_t auth
);
Description
Sets the authorization status for the current connection.
Preconditions
None
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Parameters
Parameters Description
connHandle HTTP connection handle
auth new authorization state
Remarks
None.
Example
uint8_t auth = 0x80;
TCPIP_HTTP_CurrentConnectionIsAuthorizedSet(connHandle, auth);
5.8.11.6.1.13 TCPIP_HTTP_CurrentConnectionPostSmGet Function
C
int TCPIP_HTTP_CurrentConnectionPostSmGet(
HTTP_CONN_HANDLE connHandle
);
Description
Get the POST state machine state for connection defined by connHandle
Preconditions
None
Parameters
Parameters Description
connHandle HTTP connection handle
Remarks
None
Example
switch(TCPIP_HTTP_CurrentConnectionPostSmGet(connHandle))
{
// Find the name
case SM_POST_LCD_READ_NAME:
.
.
.
// Found the value, so store the LCD and return
case SM_POST_LCD_READ_VALUE:
.
.
.
}
5.8.11.6.1.14 TCPIP_HTTP_CurrentConnectionPostSmSet Function
C
void TCPIP_HTTP_CurrentConnectionPostSmSet(
HTTP_CONN_HANDLE connHandle,
int state
);
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Description
Set the POST state machine state for connection defined by connHandle
Preconditions
None.
Parameters
Parameters Description
connHandle HTTP connection handle
state Integer state for POST state machine
Remarks
None
Example
uint8_t* httpDataBuff;
switch(TCPIP_HTTP_CurrentConnectionPostSmGet(connHandle))
{
// Find the name
case SM_POST_LCD_READ_NAME:
// Read a name
if(TCPIP_HTTP_PostNameRead(connHandle, httpDataBuff, HTTP_MAX_DATA_LEN) ==
HTTP_READ_INCOMPLETE)
return HTTP_IO_NEED_DATA;
TCPIP_HTTP_CurrentConnectionPostSmSet(connHandle, SM_POST_LCD_READ_VALUE);
// No break...continue reading value
// Found the value, so store the LCD and return
case SM_POST_LCD_READ_VALUE:
.
.
.
}
5.8.11.6.1.15 TCPIP_HTTP_CurrentConnectionSocketGet Function
C
TCP_SOCKET TCPIP_HTTP_CurrentConnectionSocketGet(
HTTP_CONN_HANDLE connHandle
);
Description
Get the socket for the current connection.
Preconditions
None
Parameters
Parameters Description
connHandle HTTP connection handle
Remarks
None.
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Example
uint32_t byteCount;
TCP_SOCKET sktHTTP;
byteCount = TCPIP_HTTP_CurrentConnectionByteCountGet(connHandle);
sktHTTP = TCPIP_HTTP_CurrentConnectionSocketGet(connHandle);
if(byteCount > TCPIP_TCP_GetIsReady(sktHTTP) + TCPIP_TCP_FifoRxFreeGet(sktHTTP))
{ // Configuration Failure
TCPIP_HTTP_CurrentConnectionStatusSet(connHandle, HTTP_REDIRECT);
return HTTP_IO_DONE;
}
5.8.11.6.1.16 TCPIP_HTTP_CurrentConnectionStatusSet Function
C
void TCPIP_HTTP_CurrentConnectionStatusSet(
HTTP_CONN_HANDLE connHandle,
HTTP_STATUS stat
);
Description
Sets HTTP status to value in enumeration HTTP_STATUS.
Preconditions
None.
Parameters
Parameters Description
connHandle HTTP connection handle
Remarks
None.
Example
byteCount = TCPIP_HTTP_CurrentConnectionByteCountGet(connHandle);
sktHTTP = TCPIP_HTTP_CurrentConnectionSocketGet(connHandle);
if(byteCount > TCPIP_TCP_GetIsReady(sktHTTP) + TCPIP_TCP_FifoRxFreeGet(sktHTTP))
{ // Configuration Failure
// 302 Redirect will be returned
TCPIP_HTTP_CurrentConnectionStatusSet(connHandle, HTTP_REDIRECT);
}
5.8.11.6.1.17 TCPIP_HTTP_CurrentConnectionUserDataGet Function
C
const void* TCPIP_HTTP_CurrentConnectionUserDataGet(
HTTP_CONN_HANDLE connHandle
);
Description
Returns the value of the user parameter for the current connection.
Preconditions
None
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Parameters
Parameters Description
connHandle HTTP connection handle
Remarks
None.
Example
uint32_t myConnData;
myConnData = (uint32_t)TCPIP_HTTP_CurrentConnectionUserDataGet(connHandle);
5.8.11.6.1.18 TCPIP_HTTP_CurrentConnectionUserDataSet Function
C
void TCPIP_HTTP_CurrentConnectionUserDataSet(
HTTP_CONN_HANDLE connHandle,
const void* uData
);
Description
Sets the user data value for the current connection.
Preconditions
None
Parameters
Parameters Description
connHandle HTTP connection handle
uData user supplied data
Remarks
None.
Example
uint32_t myConnData;
TCPIP_HTTP_CurrentConnectionUserDataSet(connHandle, (const void*)myConnData);
5.8.11.6.1.19 TCPIP_HTTP_FileInclude Function
C
void TCPIP_HTTP_FileInclude(
HTTP_CONN_HANDLE connHandle,
const uint8_t* cFile
);
Description
Allows an entire file to be included as a dynamic variable, providing a basic templating system for HTML web pages. This
reduces unneeded duplication of visual elements such as headers, menus, etc.
When pHttpCon->callbackPos is 0, the file is opened and as many bytes as possible are written. The current position is then
saved to pHttpCon->callbackPos and the file is closed. On subsequent calls, reading begins at the saved location and continues.
Once the end of the input file is reached, pHttpCon->callbackPos is set back to 0 to indicate completion.
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Preconditions
None
Parameters
Parameters Description
cFile the name of the file to be sent
Returns
None
Remarks
Users should not call this function directly, but should instead add dynamic variables in the form of ~inc:filename.ext~ in their
HTML code to include (for example) the file "filename.ext" at that specified location. The MPFS2 Generator utility will handle the
rest.
Example
5.8.11.6.1.20 TCPIP_HTTP_PostNameRead Function
C
HTTP_READ_STATUS TCPIP_HTTP_PostNameRead(
HTTP_CONN_HANDLE connHandle,
uint8_t* cData,
uint16_t wLen
);
Description
Reads a name from a URL encoded string in the TCP buffer. This function is meant to be called from an HTTPExecutePost
callback to facilitate easier parsing of incoming data. This function also prevents buffer overflows by forcing the programmer to
indicate how many bytes are expected. At least 2 extra bytes are needed in cData over the maximum length of data expected to
be read.
This function will read until the next '=' character, which indicates the end of a name parameter. It assumes that the front of the
buffer is the beginning of the name paramter to be read.
This function properly updates pHttpCon->byteCount by decrementing it by the number of bytes read. It also removes the
delimiting '=' from the buffer.
Preconditions
Front of TCP buffer is the beginning of a name parameter, and the rest of the TCP buffer contains a URL-encoded string with a
name parameter terminated by a '=' character.
Parameters
Parameters Description
connHandle HTTP connection handle
cData where to store the name once it is read
wLen how many bytes can be written to cData
Return Values
Return Values Description
HTTP_READ_OK name was successfully read
HTTP_READ_TRUNCTATED entire name could not fit in the buffer, so the value was truncated and data has
been lost
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HTTP_READ_INCOMPLETE entire name was not yet in the buffer, so call this function again later to retrieve
Remarks
None
Example
5.8.11.6.1.21 TCPIP_HTTP_PostValueRead Function
C
HTTP_READ_STATUS TCPIP_HTTP_PostValueRead(
HTTP_CONN_HANDLE connHandle,
uint8_t* cData,
uint16_t wLen
);
Description
Reads a value from a URL encoded string in the TCP buffer. This function is meant to be called from an HTTPExecutePost
callback to facilitate easier parsing of incoming data. This function also prevents buffer overflows by forcing the programmer to
indicate how many bytes are expected. At least 2 extra bytes are needed in cData above the maximum length of data expected
to be read.
This function will read until the next '&' character, which indicates the end of a value parameter. It assumes that the front of the
buffer is the beginning of the value paramter to be read. If pHttpCon->byteCount indicates that all expected bytes are in the
buffer, it assumes that all remaining data is the value and acts accordingly.
This function properly updates pHttpCon->byteCount by decrementing it by the number of bytes read. The terminating '&'
character is also removed from the buffer.
Preconditions
Front of TCP buffer is the beginning of a name parameter, and the rest of the TCP buffer contains a URL-encoded string with a
name parameter terminated by a '=' character.
Parameters
Parameters Description
connHandle HTTP connection handle
cData where to store the value once it is read
wLen how many bytes can be written to cData
Return Values
Return Values Description
HTTP_READ_OK value was successfully read
HTTP_READ_TRUNCTATED entire value could not fit in the buffer, so the value was truncated and data has
been lost
HTTP_READ_INCOMPLETE entire value was not yet in the buffer, so call this function again later to retrieve
Remarks
None
Example
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5.8.11.6.1.22 TCPIP_HTTP_URLDecode Function
C
uint8_t* TCPIP_HTTP_URLDecode(
uint8_t* cData
);
Description
Parses a string from URL encoding to plain-text. The following conversions are made: ‘=’ to ‘0’, ‘&’ to ‘0’, ‘+’ to ‘ ‘, and “%xx” to a
single hex byte.
After completion, the data has been decoded and a null terminator signifies the end of a name or value. A second null terminator
(or a null name parameter) indicates the end of all the data.
Preconditions
The data parameter is null terminated and has at least one extra byte free.
Parameters
Parameters Description
cData The string which is to be decoded in place.
Returns
A pointer to the last null terminator in data, which is also the first free byte for new data.
Remarks
This function is called by the stack to parse GET arguments and cookie data. User applications can use this function to decode
POST data, but first need to verify that the string is null-terminated.
Example
code>
5.8.11.6.1.23 HTTPCheckAuth Function
C
uint8_t HTTPCheckAuth(
HTTP_CONN_HANDLE connHandle,
uint8_t* cUser,
uint8_t* cPass
);
Description
This function is implemented by the application developer in CustomHTTPApp.c. Its function is to determine if the user name and
password supplied by the client are acceptable for this resource.
The value of curHTTP.isAuthorized will be set to the previous return value of HTTPRequiresAuthorization. This callback function
can check this value to determine if only specific user names or passwords will be accepted for this resource.
Return values 0x80 - 0xff indicate that the credentials were accepted, while values from 0x00 to 0x79 indicate that authorization
failed. While most applications will only use a single value to grant access, flexibility is provided to store multiple values in order
to indicate which user (or user's group) logged in.
The return value of this function is saved as curHTTP.isAuthorized, and will be available to future callbacks, including any of the
HTTPExecuteGet, HTTPExecutePost, or HTTPPrint_varname callbacks.
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Preconditions
None
Parameters
Parameters Description
connHandle HTTP connection handle
cUser the user name supplied by the client
cPass the password supplied by the client
Return Values
Return Values Description
<= 0x79 the credentials were rejected
>= 0x80 access is granted for this connection
Remarks
This function is only called when an Authorization header is encountered.
This function may NOT write to the TCP buffer.
5.8.11.6.1.24 HTTPExecuteGet Function
C
HTTP_IO_RESULT HTTPExecuteGet(
HTTP_CONN_HANDLE connHandle
);
Description
This function is implemented by the application developer in CustomHTTPApp.c. Its purpose is to parse the data received from
URL parameters (GET method forms) and cookies and perform any application-specific tasks in response to these inputs. Any
required authentication has already been validated.
When this function is called, curHTTP.data contains sequential name/value pairs of strings representing the data received. In this
format, TCPIP_HTTP_ArgGet can be used to search for specific variables in the input. If data buffer space associated with this
connection is required, curHTTP.data may be overwritten here once the application is done with the values. Any data placed
there will be available to future callbacks for this connection, including HTTPExecutePost and any HTTPPrint_varname dynamic
substitutions.
This function may also issue redirections by setting curHTTP.data to the destination file name or URL, and curHTTP.httpStatus
to HTTP_REDIRECT.
Finally, this function may set cookies. Set curHTTP.data to a series of name/value string pairs (in the same format in which
parameters arrive) and then set curHTTP.hasArgs equal to the number of cookie name/value pairs. The cookies will be
transmitted to the browser, and any future requests will have those values available in curHTTP.data.
Preconditions
None
Parameters
Parameters Description
connHandle HTTP connection handle
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Return Values
Return Values Description
HTTP_IO_DONE application is done processing
HTTP_IO_NEED_DATA this value may not be returned because more data will not become available
HTTP_IO_WAITING the application is waiting for an asynchronous process to complete, and this
function should be called again later
Remarks
This function is only called if variables are received via URL parameters or Cookie arguments. This function may NOT write to
the TCP buffer.
This function may service multiple HTTP requests simultaneously. Exercise caution when using global or static variables inside
this routine. Use curHTTP.callbackPos or curHTTP.data for storage associated with individual requests.
5.8.11.6.1.25 HTTPExecutePost Function
C
HTTP_IO_RESULT HTTPExecutePost(
HTTP_CONN_HANDLE connHandle
);
Description
This function is implemented by the application developer in CustomHTTPApp.c. Its purpose is to parse the data received from
POST forms and perform any application-specific tasks in response to these inputs. Any required authentication has already
been validated before this function is called.
When this function is called, POST data will be waiting in the TCP buffer. curHTTP.byteCount will indicate the number of bytes
remaining to be received before the browser request is complete.
Since data is still in the TCP buffer, the application must call TCPIP_TCP_Get or TCPIP_TCP_ArrayGet in order to retrieve
bytes. When this is done, curHTTP.byteCount MUST be updated to reflect how many bytes now remain. The functions
TCPIP_TCP_Find, TCPFindString, and TCPIP_TCP_ArrayFind may be helpful to locate data in the TCP buffer.
In general, data submitted from web forms via POST is URL encoded. The TCPIP_HTTP_URLDecode function can be used to
decode this information back to a standard string if required. If data buffer space associated with this connection is required,
curHTTP.data may be overwritten here once the application is done with the values. Any data placed there will be available to
future callbacks for this connection, including HTTPExecutePost and any HTTPPrint_varname dynamic substitutions.
Whenever a POST form is processed it is recommended to issue a redirect back to the browser, either to a status page or to the
same form page that was posted. This prevents accidental duplicate submissions (by clicking refresh or back/forward) and
avoids browser warnings about "resubmitting form data". Redirects may be issued to the browser by setting curHTTP.data to the
destination file or URL, and curHTTP.httpStatus to HTTP_REDIRECT.
Finally, this function may set cookies. Set curHTTP.data to a series of name/value string pairs (in the same format in which
parameters arrive) and then set curHTTP.hasArgs equal to the number of cookie name/value pairs. The cookies will be
transmitted to the browser, and any future requests will have those values available in curHTTP.data.
Preconditions
None
Parameters
Parameters Description
connHandle HTTP connection handle
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Return Values
Return Values Description
HTTP_IO_DONE application is done processing
HTTP_IO_NEED_DATA more data is needed to continue, and this function should be called again later
HTTP_IO_WAITING the application is waiting for an asynchronous process to complete, and this
function should be called again later
Remarks
This function is only called when the request method is POST, and is only used when HTTP_USE_POST is defined. This
method may NOT write to the TCP buffer.
This function may service multiple HTTP requests simultaneously. Exercise caution when using global or static variables inside
this routine. Use curHTTP.callbackPos or curHTTP.data for storage associated with individual requests.
5.8.11.6.1.26 HTTPNeedsAuth Function
C
uint8_t HTTPNeedsAuth(
HTTP_CONN_HANDLE connHandle,
uint8_t* cFile
);
Description
This function is implemented by the application developer in CustomHTTPApp.c. Its function is to determine if a file being
requested requires authentication to view. The user name and password, if supplied, will arrive later with the request headers,
and will be processed at that time.
Return values 0x80 - 0xff indicate that authentication is not required, while values from 0x00 to 0x79 indicate that a user name
and password are required before proceeding. While most applications will only use a single value to grant access and another
to require authorization, the range allows multiple "realms" or sets of pages to be protected, with different credential
requirements for each.
The return value of this function is saved as curHTTP.isAuthorized, and will be available to future callbacks, including
HTTPCheckAuth and any of the HTTPExecuteGet, HTTPExecutePost, or HTTPPrint_varname callbacks.
Preconditions
None
Parameters
Parameters Description
connHandle HTTP connection handle
cFile the name of the file being requested
Return Values
Return Values Description
<= 0x79 valid authentication is required
>= 0x80 access is granted for this connection
Remarks
This function may NOT write to the TCP buffer.
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5.8.11.6.1.27 HTTPPrint_varname Function
C
void HTTPPrint_varname(
HTTP_CONN_HANDLE connHandle,
uint16_t wParam1,
uint16_t wParam2,
...
);
Description
Functions in this style are implemented by the application developer in CustomHTTPApp.c. These functions generate dynamic
content to be inserted into web pages and other files returned by the HTTP server.
Functions of this type are called when a dynamic variable is located in a web page. (ie, ~varname~ ) The name between the tilde
'~' characters is appended to the base function name. In this example, the callback would be named HTTPPrint_varname.
The function prototype is located in your project's http_print.h, which is automatically generated by the MPFS2 Utility. The
prototype will have uint16_t parameters included for each parameter passed in the dynamic variable. For example, the variable
"~myArray(2,6)~" will generate the prototype "void HTTPPrint_varname(uint16_t, uint16_t);".
When called, this function should write its output directly to the TCP socket using any combination of TCPIP_TCP_PutIsReady,
TCPIP_TCP_Put, TCPIP_TCP_ArrayPut, TCPIP_TCP_StringPut, TCPIP_TCP_ArrayPut, and TCPIP_TCP_StringPut.
Before calling, the HTTP server guarantees that at least HTTP_MIN_CALLBACK_FREE bytes (defaults to 16 bytes) are free in
the output buffer. If the function is writing less than this amount, it should simply write the data to the socket and return.
In situations where a function needs to write more this amount, it must manage its output state using curHTTP.callbackPos. This
value will be set to zero before the function is called. If the function is managing its output state, it must set this to a non-zero
value before returning. Typically this is used to track how many bytes have been written, or how many remain to be written. If
curHTTP.callbackPos is non-zero, the function will be called again when more buffer space is available. Once the callback
completes, set this value back to zero to resume normal servicing of the request.
Preconditions
None
Parameters
Parameters Description
connHandle HTTP connection handle
wParam1 first parameter passed in the dynamic variable (if any)
wParam2 second parameter passed in the dynamic variable (if any)
... additional parameters as necessary
Returns
None
Remarks
This function may service multiple HTTP requests simultaneously, especially when managing its output state. Exercise caution
when using global or static variables inside this routine. Use curHTTP.callbackPos or curHTTP.data for storage associated with
individual requests.
5.8.11.6.2 Data Types and Constants
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5.8.11.6.2.1 HTTP_CONN_HANDLE Type
C
typedef const void* HTTP_CONN_HANDLE;
Description
HTTP connection identifier, handle of a HTTP connection
5.8.11.6.2.2 HTTP_FILE_TYPE Enumeration
C
typedef enum {
HTTP_TXT = 0u,
HTTP_HTM,
HTTP_HTML,
HTTP_CGI,
HTTP_XML,
HTTP_CSS,
HTTP_GIF,
HTTP_PNG,
HTTP_JPG,
HTTP_JAVA,
HTTP_WAV,
HTTP_UNKNOWN
} HTTP_FILE_TYPE;
Description
File type definitions
Members
Members Description
HTTP_TXT = 0u File is a text document
HTTP_HTM File is HTML (extension .htm)
HTTP_HTML File is HTML (extension .html)
HTTP_CGI File is HTML (extension .cgi)
HTTP_XML File is XML (extension .xml)
HTTP_CSS File is stylesheet (extension .css)
HTTP_GIF File is GIF image (extension .gif)
HTTP_PNG File is PNG image (extension .png)
HTTP_JPG File is JPG image (extension .jpg)
HTTP_JAVA File is java (extension .java)
HTTP_WAV File is audio (extension .wav)
HTTP_UNKNOWN File type is unknown
5.8.11.6.2.3 HTTP_IO_RESULT Enumeration
C
typedef enum {
HTTP_IO_DONE = 0u,
HTTP_IO_NEED_DATA,
HTTP_IO_WAITING
} HTTP_IO_RESULT;
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Description
Result states for execution callbacks
Members
Members Description
HTTP_IO_DONE = 0u Finished with procedure
HTTP_IO_NEED_DATA More data needed to continue, call again later
HTTP_IO_WAITING Waiting for asynchronous process to complete, call again later
5.8.11.6.2.4 HTTP_MODULE_CONFIG Structure
C
typedef struct {
uint16_t nConnections;
uint16_t dataLen;
uint16_t sktTxBuffSize;
uint16_t sktRxBuffSize;
uint16_t configFlags;
} HTTP_MODULE_CONFIG;
Description
HTTP module dynamic configuration data
Members
Members Description
uint16_t nConnections; number of http connections
uint16_t dataLen; size of the data buffer for reading cookie and GET/POST arguments (bytes)
uint16_t sktTxBuffSize; size of TX buffer for the associatted socket; leave 0 for default
uint16_t sktRxBuffSize; size of RX buffer for the associatted socket; leave 0 for default
uint16_t configFlags; a HTTP_MODULE_FLAGS value.
5.8.11.6.2.5 HTTP_MODULE_FLAGS Enumeration
C
typedef enum {
HTTP_MODULE_FLAG_ADJUST_SKT_FIFOS = 0x01,
HTTP_MODULE_FLAG_NO_DELAY = 0x02
} HTTP_MODULE_FLAGS;
Description
HTTP module configuration flags
Members
Members Description
HTTP_MODULE_FLAG_ADJUST_SKT_FIFOS
= 0x01
adjust corresponding socket FIFO at run time improves throughput when the
socket buffers are small
HTTP_MODULE_FLAG_NO_DELAY = 0x02 create the http sockets with NO-DELAY option it will flush data as soon as
possible
5.8.11.6.2.6 HTTP_READ_STATUS Enumeration
C
typedef enum {
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HTTP_READ_OK = 0u,
HTTP_READ_TRUNCATED,
HTTP_READ_INCOMPLETE
} HTTP_READ_STATUS;
Description
Result states for HTTPPostReadName and HTTPPostReadValue
Members
Members Description
HTTP_READ_OK = 0u Read was successful
HTTP_READ_TRUNCATED Buffer overflow prevented by truncating value
HTTP_READ_INCOMPLETE Entire object is not yet in the buffer. Try again later.
5.8.11.6.2.7 HTTP_STATUS Enumeration
C
typedef enum {
HTTP_GET = 0u,
HTTP_POST,
HTTP_BAD_REQUEST,
HTTP_UNAUTHORIZED,
HTTP_NOT_FOUND,
HTTP_OVERFLOW,
HTTP_INTERNAL_SERVER_ERROR,
HTTP_NOT_IMPLEMENTED,
HTTP_REDIRECT,
HTTP_SSL_REQUIRED,
HTTP_MPFS_FORM,
HTTP_MPFS_UP,
HTTP_MPFS_OK,
HTTP_MPFS_ERROR
} HTTP_STATUS;
Description
Supported Commands and Server Response Codes
Members
Members Description
HTTP_GET = 0u GET command is being processed
HTTP_POST POST command is being processed
HTTP_BAD_REQUEST 400 Bad Request will be returned
HTTP_UNAUTHORIZED 401 Unauthorized will be returned
HTTP_NOT_FOUND 404 Not Found will be returned
HTTP_OVERFLOW 414 Request-URI Too Long will be returned
HTTP_INTERNAL_SERVER_ERROR 500 Internal Server Error will be returned
HTTP_NOT_IMPLEMENTED 501 Not Implemented (not a GET or POST command)
HTTP_REDIRECT 302 Redirect will be returned
HTTP_SSL_REQUIRED 403 Forbidden is returned, indicating SSL is required
HTTP_MPFS_FORM Show the MPFS Upload form
HTTP_MPFS_UP An MPFS Upload is being processed
HTTP_MPFS_OK An MPFS Upload was successful
HTTP_MPFS_ERROR An MPFS Upload was not a valid image
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5.8.11.6.2.8 HTTPReadPostPair Macro
C
#define HTTPReadPostPair(connHandle, cData, wLen) TCPIP_HTTP_PostValueRead(connHandle, cData,
wLen)
Description
Reads a name and value pair from a URL encoded string in the TCP buffer. This function is meant to be called from an
HTTPExecutePost callback to facilitate easier parsing of incoming data. This function also prevents buffer overflows by forcing
the programmer to indicate how many bytes are expected. At least 2 extra bytes are needed in cData over the maximum length
of data expected to be read.
This function will read until the next '&' character, which indicates the end of a value parameter. It assumes that the front of the
buffer is the beginning of the name paramter to be read.
This function properly updates curHTTP.byteCount by decrementing it by the number of bytes read. It also removes the
delimiting '&' from the buffer.
Once complete, two strings will exist in the cData buffer. The first is the parameter name that was read, while the second is the
associated value.
Preconditions
Front of TCP buffer is the beginning of a name parameter, and the rest of the TCP buffer contains a URL-encoded string with a
name parameter terminated by a '=' character and a value parameter terminated by a '&'.
Parameters
Parameters Description
connHandle HTTP connection handle
cData where to store the name and value strings once they are read
wLen how many bytes can be written to cData
Return Values
Return Values Description
HTTP_READ_OK name and value were successfully read
HTTP_READ_TRUNCTATED entire name and value could not fit in the buffer, so input was truncated and data
has been lost
HTTP_READ_INCOMPLETE entire name and value was not yet in the buffer, so call this function again later to
retrieve
Remarks
This function is aliased to TCPIP_HTTP_PostValueRead, since they effectively perform the same task. The name is provided
only for completeness.
5.8.11.7 Files
Files
Name Description
http.h
http_config.h HTTP configuration file
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Description
5.8.11.7.1 http.h
HTTP Headers for Microchip TCP/IP Stack
Enumerations
Name Description
HTTP_FILE_TYPE File type definitions
HTTP_IO_RESULT Result states for execution callbacks
HTTP_MODULE_FLAGS HTTP module configuration flags
HTTP_READ_STATUS Result states for HTTPPostReadName and HTTPPostReadValue
HTTP_STATUS Supported Commands and Server Response Codes
Functions
Name Description
HTTPCheckAuth Performs validation on a specific user name and password.
HTTPExecuteGet Processes GET form field variables and cookies.
HTTPExecutePost Processes POST form variables and data.
HTTPNeedsAuth Determines if a given file name requires authentication
HTTPPrint_varname Inserts dynamic content into a web page
TCPIP_HTTP_ActiveConnectionCountGet Gets the number of active connections.
TCPIP_HTTP_ArgGet Locates a form field value in a given data array.
TCPIP_HTTP_CurrentConnectionByteCountDec Decrements byte count.
TCPIP_HTTP_CurrentConnectionByteCountGet Returns how many bytes have been read so far
TCPIP_HTTP_CurrentConnectionByteCountSet Sets how many bytes have been read so far
TCPIP_HTTP_CurrentConnectionCallbackPosGet Returns the callback position indicator.
TCPIP_HTTP_CurrentConnectionCallbackPosSet Sets the callback position indicator.
TCPIP_HTTP_CurrentConnectionDataBufferGet Returns pointer to connection general purpose data buffer.
TCPIP_HTTP_CurrentConnectionFileGet Get handle to current connection's file.
TCPIP_HTTP_CurrentConnectionHasArgsSet Sets whether there are get or cookie arguments
TCPIP_HTTP_CurrentConnectionIsAuthorizedGet Get the authorized state for the current connection.
TCPIP_HTTP_CurrentConnectionIsAuthorizedSet Sets the authorized state for the current connection.
TCPIP_HTTP_CurrentConnectionPostSmGet Get the POST state machine state.
TCPIP_HTTP_CurrentConnectionPostSmSet Set the POST state machine state.
TCPIP_HTTP_CurrentConnectionSocketGet Get the socket for the current connection.
TCPIP_HTTP_CurrentConnectionStatusSet Sets HTTP status.
TCPIP_HTTP_CurrentConnectionUserDataGet Gets the user data parameter for the current connection.
TCPIP_HTTP_CurrentConnectionUserDataSet Sets the user data parameter for the current connection.
TCPIP_HTTP_FileInclude Writes a file byte-for-byte to the currently loaded TCP socket.
TCPIP_HTTP_PostNameRead Reads a name from a URL encoded string in the TCP buffer.
TCPIP_HTTP_PostValueRead Reads a value from a URL encoded string in the TCP buffer.
TCPIP_HTTP_URLDecode Parses a string from URL encoding to plain-text.
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Macros
Name Description
HTTPReadPostPair Reads a name and value pair from a URL encoded string in the TCP buffer.
Structures
Name Description
HTTP_MODULE_CONFIG HTTP module dynamic configuration data
Types
Name Description
HTTP_CONN_HANDLE HTTP connection identifier, handle of a HTTP connection
5.8.11.7.2 http_config.h
HyperText Transfer Protocol (HTTP) Configuration file
This file contains the HTTP module configuration options
Macros
Name Description
HTTP_CACHE_LEN Max lifetime (sec) of static responses as string
HTTP_CONFIG_FLAGS Define the HTTP module configuration flags Use 0 for default
HTTP_DEFAULT_FILE Indicate what file to serve when no specific one is requested
HTTP_DEFAULT_LEN For buffer overrun protection. Set to longest length of above two strings.
HTTP_FILE_UPLOAD Configure MPFS over HTTP updating Comment this line to disable
updating via HTTP
HTTP_MAX_CONNECTIONS Maximum numbers of simultaneous supported HTTP connections.
HTTP_MAX_DATA_LEN Define the maximum data length for reading cookie and GET/POST
arguments (bytes)
HTTP_MAX_HEADER_LEN Set to length of longest string above
HTTP_MIN_CALLBACK_FREE Define the minimum number of bytes free in the TX FIFO before
executing callbacks
HTTP_PORT Define the listening port for the HTTP server
HTTP_SKT_RX_BUFF_SIZE Define the size of the RX buffer for the http socket Use 0 for default
HTTP_SKT_TX_BUFF_SIZE Define the size of the TX buffer for the http socket Use 0 for default
HTTP_SSL_ONLY_CHAR Files beginning with this character will only be served over HTTPS Set
to 0x00 to require for all files Set to 0xff to require for no files
HTTP_TIMEOUT Max time (sec) to await more data before timing out and disconnecting
the socket
HTTP_USE_AUTHENTICATION Enable basic authentication support
HTTP_USE_COOKIES Enable cookie support
HTTP_USE_POST Define which HTTP modules to use If not using a specific module,
comment it to save resources Enable POST support
HTTPS_DEFAULT_FILE Indicate what file to serve when no specific one is requested
HTTPS_PORT Listening port for HTTPS server (when SSL enabled)
TCPIP_STACK_USE_BASE64_DECODE TCPIP_STACK_USE_BASE64_DECODE
HTTP_USE_AUTHENTICATION
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5.8.12 ICMP TCP/IP Stack Library
5.8.12.1 Introduction
Internet Control Message Protocol (ICMP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the ICMP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The Internet Control Message Protocol is used to send error and status messages and requests. The ICMP module implements
the Echo Reply message type (commonly referred to as a ping) which can be used to determine if a specified host is reachable
across an IP network from a device running the TCP/IP stack. An ICMP server is also supported to respond to pings from other
devices.
5.8.12.2 Release Notes
MPLAB Harmony Version: v0.70b ICMP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.12.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
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MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.12.4 Using the Library
This topic describes the basic architecture of the ICMP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: icmp.h
The interface to the ICMP TCP/IP Stack library is defined in the "icmp.h" header file. This file is included by the "tcpip.h" file. Any
C language source (.c) file that uses the ICMP TCP/IP Stack library should include "tcpip.h".
Library File:
The ICMP TCP/IP Stack library archive (.a) file is installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.12.4.1 Abstraction Model
This library provides the API of the ICMP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
ICMP Software Abstraction Block Diagram
5.8.12.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the ICMP module.
Library Interface Section Description
Functions This section provides general interface routines
Data Types and Constants This section provides various definitions describing this API
5.8.12.5 Configuring the Library
Macros
Name Description
ICMP_TIMEOUT ICMP Timeout Value
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Description
The configuration of the ICMP TCP/IP Stack is based on the file tcpip_config.h
This header file contains the configuration selection for the ICMP TCP/IP Stack. Based on the selections made, the ICMP
TCP/IP Stack will support or not support selected features. These configuration settings will apply to all instances of the ICMP
TCP/IP Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.12.5.1 ICMP_TIMEOUT Macro
C
#define ICMP_TIMEOUT (4ul*SYS_TICK_TicksPerSecondGet())
Description
ICMP Timeout Value
5.8.12.6 Building the Library
This section list the files that are available in the \src of the ICMP driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.8.12.7 Library Interface
Data Types and Constants
Name Description
ICMP_ECHO_RESULT result of an ICMPSendEchoRequest call
ICMP_HANDLE a handle that a client can use after the event handler has been registered
ICMP_MODULE_CONFIG Provides a placeholder for ICMP module configuration.
Functions
Name Description
TCPIP_ICMP_CallbackDeregister De-registers the ICMP callback function.
TCPIP_ICMP_CallbackRegister Registers a callback to allow the application layer to process incoming ICMPv4
packets
TCPIP_ICMP_EchoRequestSend Sends an ICMP echo request to a remote node.
Description
This section describes the Application Programming Interface (API) functions of the ICMP TCP/IP Stack.
Refer to each section for a detailed description.
5.8.12.7.1 Functions
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5.8.12.7.1.1 TCPIP_ICMP_CallbackDeregister Function
C
bool TCPIP_ICMP_CallbackDeregister(
ICMP_HANDLE hIcmp
);
Description
This function a stack client to remove its former registered notification handler. After this operation the client will no longer be
notified about the receiving of replies to the ICMP requests.
Preconditions
TCPIP Stack initialized, up and running. A previous successful call to TCPIP_ICMP_CallbackRegister() has been done.
Parameters
Parameters Description
hIcmp an ICMP handle obtained by TCPIP_ICMP_CallbackRegister()
Returns
true - if the notification handler has been successfully removed false - if such notification handler couldn't be found
Remarks
None
Example
void MyICMPCallbackFunction(TCPIP_NET_HANDLE hNetIf, IPV4_ADDR * remoteIP, void * data);
ICMP_HANDLE hIcmp = TCPIP_ICMP_CallbackRegister(&MyICMPCallbackFunction);
if(hIcmp != 0)
{
// successfully registered my handler
// send requests and process the incoming results
// ...
// later on, once ew're done, remove the notification handler
TCPIP_ICMP_CallbackDeregister(hIcmp);
}
5.8.12.7.1.2 TCPIP_ICMP_CallbackRegister Function
C
ICMP_HANDLE TCPIP_ICMP_CallbackRegister(
void (*callback)(TCPIP_NET_HANDLE hNetIf, IPV4_ADDR * remoteIP, void * data)
);
Description
Allows a stack client to be notified of the receiving of a response from an ICMP query. Once an Echo request reply is received,
the notification handler callback will be called, letting the client know of the result of the query. The callback will contain as
parameters:
• the network interface handle on which the query reply was received
• the remote host IP address
• a 32 bit value containing the sequence number in the low 16 bit part and the identifier value in th ehigh 16 bit part.
Preconditions
TCPIP Stack initialized, up and running.
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Parameters
Parameters Description
callback notification function to be registered This function will be called when an echo
request reply is received.
Returns
• A non-null handle if the registration succeeded
• 0 if the registration operation failed (out of memory, for example).
Remarks
None
Example
// Callback function prototype
void MyICMPCallbackFunction(TCPIP_NET_HANDLE hNetIf, IPV4_ADDR * remoteIP, void * data);
// *****************************************************************************
// Register callback function
ICMP_HANDLE hIcmp = TCPIP_ICMP_CallbackRegister(&MyICMPCallbackFunction);
if(hIcmp == 0)
{
// process error; couldn't register a handler
}
// success; I can send an Echo request an receive notification
// *****************************************************************************
IPV4_ADDR remoteIP = 0xc0a00101;
uint16_t mySequenceNumber = 1;
uint16_t myId = 0x1234;
// send an ICMP query request
TCPIP_ICMP_EchoRequestSend(&remoteIP, mySequenceNumber, myId;
// *****************************************************************************
// process the ICMP reply in the callback function
void MyICMPCallbackFunction(TCPIP_NET_HANDLE hNetIf, IPV4_ADDR * remoteIP, void * data)
{
// process request from interface hNetIf and remoteIP address
uint16_t* pReply = (uint16_t*)data;
uint16_t myRecvId = *pReply;
uint16_t myRecvSequenceNumber = *(pReply + 1);
// check that the sequence number, ID and IP address match, etc.
}
5.8.12.7.1.3 TCPIP_ICMP_EchoRequestSend Function
C
ICMP_ECHO_RESULT TCPIP_ICMP_EchoRequestSend(
IPV4_ADDR * targetAddr,
uint16_t sequenceNumber,
uint16_t identifier
);
Description
This function allows a stack client to send an ICMP query message to a remote host. The supplied sequence number and
identifier will be used in the query message. The user will be notified by the result of the query using a notification handle
registered by using the TCPIP_ICMP_CallbackRegister function.
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Preconditions
TCPIP Stack initialized, up and running.
Parameters
Parameters Description
targetAddr remote host IP address.
Returns
true - if the query request was successfully sent false otherwise (interface not ready for transmission)
Remarks
None
Example
IPV4_ADDR remoteAddress = 0xc0a00101;
uint16_t mySequenceNumber = 1;
uint16_t myId = 0x1234;
if(TCPIP_ICMP_EchoRequestSend(&remoteAddress, mySequenceNumber, myId) )
{
// successfully sent the ICMP request
//
}
else
{
// process the error
}
5.8.12.7.2 Data Types and Constants
5.8.12.7.2.1 ICMP_ECHO_RESULT Enumeration
C
typedef enum {
ICMP_ECHO_OK = 0,
ICMP_ECHO_ALLOC_ERROR = -1,
ICMP_ECHO_ROUTE_ERROR = -2,
ICMP_ECHO_TRANSMIT_ERROR = -3
} ICMP_ECHO_RESULT;
Description
result of an ICMPSendEchoRequest call
Members
Members Description
ICMP_ECHO_OK = 0 operation successful error codes, < 0
ICMP_ECHO_ALLOC_ERROR = -1 could not allocate memory
ICMP_ECHO_ROUTE_ERROR = -2 could not find a route to destination
ICMP_ECHO_TRANSMIT_ERROR = -3 could not transmit (dead interface, etc.)
5.8.12.7.2.2 ICMP_HANDLE Type
C
typedef const void* ICMP_HANDLE;
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Description
a handle that a client can use after the event handler has been registered
5.8.12.7.2.3 ICMP_MODULE_CONFIG Structure
C
typedef struct {
} ICMP_MODULE_CONFIG;
Description
ICMP Module Configuration Structure Typedef
Provides a placeholder for ICMP module configuration.
Remarks
None.
5.8.12.8 Files
Files
Name Description
icmp.h
icmp_config.h ICMP configuration file
Description
5.8.12.8.1 icmp.h
ICMP Module Defs for Microchip TCP/IP Stack
Enumerations
Name Description
ICMP_ECHO_RESULT result of an ICMPSendEchoRequest call
Functions
Name Description
TCPIP_ICMP_CallbackDeregister De-registers the ICMP callback function.
TCPIP_ICMP_CallbackRegister Registers a callback to allow the application layer to process incoming ICMPv4
packets
TCPIP_ICMP_EchoRequestSend Sends an ICMP echo request to a remote node.
Structures
Name Description
ICMP_MODULE_CONFIG Provides a placeholder for ICMP module configuration.
Types
Name Description
ICMP_HANDLE a handle that a client can use after the event handler has been registered
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5.8.12.8.2 icmp_config.h
Internet Control Message Protocol (ICMP) Configuration file
This file contains the ICMP module configuration options
Macros
Name Description
ICMP_TIMEOUT ICMP Timeout Value
5.8.13 ICMPv6 TCP/IP Stack Library
5.8.13.1 Introduction
ICMPv6 TCP/IP Library
for
Microchip Microcontrollers
This library provides the API of the ICMPv6 TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
This document specifies a set of APIs of Internet Control Message Protocol (ICMP) messages for use with version 6 of the
Internet Protocol (IPv6).
The Internet Protocol, version 6 (IPv6) is a new version of IP, uses the Internet Control Message Protocol (ICMP) as defined for
IPv4
[RFC-792], with a number of changes. It is called ICMPv6, and has an IPv6 Next Header value of 58.
ICMPv6 messages are used by IPv6 nodes to report error messages and information messages. ICMPv6 is also used for Ipv6
node diagnostic (i.e., IPv6 ping).
The ICMPv6 protocol also provides a framework for the following:
Neighbor Discovery
Neighbor Discovery is a series of five ICMPv6 messages that manage node-to-node communication on a link. Neighbor
Discovery replaces Address Resolution Protocol (ARP), ICMP(IPv4) Router Discovery, and the ICMP(IPv4) Redirect message.
Multicast Listener Discovery (MLD)
Multicast Listener Discovery is a series of three ICMP messages that manage subnet multicast membership. Multicast Listener
Discovery replaces version 2 of the Internet Group Management Protocol (IGMP) for IPv4.
Path MTU Discovery
The maximum transmission unit (MTU) for a path is the minimum link MTU of all links on a path between a source and a
destination. IPv6 packets that are smaller than the path MTU do not require fragmentation by the host and are successfully
forwarded by all routers on the path. To discover the path MTU, the sending host uses the receipt of ICMPv6 Packet Too Big
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messages.
ICMPv6 Common
Messages
Functions
Echo Request Sent to check IPv6 connectivity to a particular host.
Echo Reply Sent in response to an ICMPv6 Echo Request.
Destination
Unreachable
Sent by a router or the destination host to inform the sending host that the packet or payload cannot be
delivered.
Packet to big Sent by a router to inform a sending host that a packet is too large to forward.
Time exceeded Sent by a router to inform a sending host that the Hop Limit of an IPv6 packet has expired.
Parameter Problem Sent by a router to inform a sending host that an error was encountered in processing the IPv6 header
or an IPv6 extension header.
5.8.13.2 Release Notes
MPLAB Harmony Version: v0.70b ICMPv6 TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.13.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.13.4 Using the Library
This topic describes the basic architecture of the ICMPv6 TCP/IP Library and provides information and examples on how to use
it.
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Interface Header File: icmpv6.h
The interface to the ICMPv6 TCP/IP library is defined in the "icmpv6.h" header file. Any C language source (.c) file that uses the
ICMPv6 TCP/IP library should include "IPv6.h , icmpv6.h and ndp.h".
Library File:
The IP TCPIP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCPIP Stack interacts with the framework.
5.8.13.4.1 Abstraction Model
This library provides the API of the ICMPv6 TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
ICMPv6 Software Abstraction Block Diagram
This module provides software abstraction of the IPv6 module existent in any TCP/IP Stack implementation. It removes the
overhead of address resolution from all other modules in the stack.
IPv6 Block Diagram
ICMPv6 message communication
5.8.13.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the IPv6 and ICMPv6 module.
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Library Interface Section Description
Functions This section provides general interface routines
Data Types and Constants This section provides various definitions describing this API
5.8.13.5 Configuring the Library
Macros
Name Description
ICMPV6_TIMEOUT ICMPv6 Timeout Value
Description
The configuration of the ICMPv6 TCP/IP Stack is based on the file icmpv6_config.h
This header file contains the configuration selection for the ICMPv6 TCP/IP Stack. Based on the selections made, the ICMPv6
TCP/IP Stack IP will support or not support selected features. These configuration settings will apply to all instances of the
ICMPv6 TCP/IP Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build.
5.8.13.5.1 ICMPV6_TIMEOUT Macro
C
#define ICMPV6_TIMEOUT (4ul*SYS_TICK_ResolutionGet())
Description
ICMPv6 Timeout Value
5.8.13.6 Building the Library
This section list the files that are available in the \src of the IPv6 and ICMPv6 driver. It lists which files need to be included in the
build based on either a hardware feature present on the board or configuration option selected by the system.
• ipv6.c
• icmpv6.c
• ndp.c
TCPIP_STACK_USE_IPV6 is enabled from tcpip_config.h .
5.8.13.7 Library Interface
Data Types and Constants
Name Description
ICMPV6_ERR_PTB_CODE Definition for ICMPv6 Packet Too Big error code
ICMPV6_INFO_EREQ_CODE Definition for ICMPv6 Packet Echo Request info code
ICMPV6_INFO_ERPL_CODE Definition for ICMPv6 Packet Echo Reply info code
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TCPIP_ICMPV6_PutHeaderEchoReply This is macro TCPIP_ICMPV6_PutHeaderEchoReply.
ICMPV6_ERR_DU_CODE Definitions for ICMPv6 Destination Unreachable error code
ICMPV6_ERR_PP_CODE Definitions for ICMPv6 Parameter Problem error code
ICMPV6_ERR_TE_CODE Definitions for ICMPv6 Time Exceeded error code
ICMPV6_HANDLE a handle that a client can use after the event handler has been registered
ICMPV6_HEADER_ECHO Header for an ICMPv6 Echo Request/Reply packet
ICMPV6_HEADER_ERROR Header for an ICMPv6 Error packet
ICMPV6_PACKET_TYPES ICMPv6 packet types
Functions
Name Description
TCPIP_ICMPV6_CallbackDeregister Deregisters an upper-layer function from ICMPv6 callback.
TCPIP_ICMPV6_CallbackRegister Registers an upper-layer function for ICMPv6 callback.
TCPIP_ICMPV6_Close This is function TCPIP_ICMPV6_Close.
TCPIP_ICMPV6_Flush Flushes an ICMPv6 Packet
TCPIP_ICMPV6_HeaderEchoRequestPut Allocates a packet, IPv6 Header, and Upper-layer header for an
ICMPv6 echo request.
Description
This section describes the Application Programming Interface (API) functions of the ICMPv6 TCP/IP Stack Library.
Refer to each section for a detailed description.
5.8.13.7.1 Functions
5.8.13.7.1.1 TCPIP_ICMPV6_CallbackDeregister Function
C
bool TCPIP_ICMPV6_CallbackDeregister(
ICMPV6_HANDLE hIcmpv6
);
Description
deregisters an upper-layer function from the ICMPv6 register list.
Preconditions
None
Parameters
Parameters Description
hIcmpv6 ICMPv6 handler
Returns
true or false
Remarks
None
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5.8.13.7.1.2 TCPIP_ICMPV6_CallbackRegister Function
C
ICMPV6_HANDLE TCPIP_ICMPV6_CallbackRegister(
void (*callback)(TCPIP_NET_HANDLE hNetIf, uint8_t type, IPV6_ADDR * localIP, IPV6_ADDR *
remoteIP, void * header)
);
Description
Registers an upper-layer function to handle ICMPv6 messages that may require action at the application layer (Echo Replies,
Error messages)
Preconditions
None
Parameters
Parameters Description
type ICMPv6 header type
localIP IPv6 destination address of the incoming message
remoteIP IPv6 address of the node that originated the incoming message
header Pointer to the ICMPv6 header
Returns
A ICMPV6_HANDLE
Remarks
None
5.8.13.7.1.3 TCPIP_ICMPV6_Close Function
C
void TCPIP_ICMPV6_Close(
IPV6_PACKET * pkt
);
Description
This is function TCPIP_ICMPV6_Close.
5.8.13.7.1.4 TCPIP_ICMPV6_Flush Function
C
bool TCPIP_ICMPV6_Flush(
IPV6_PACKET * pkt
);
Description
Flushes an ICMPv6 Packet
Preconditions
None
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Parameters
Parameters Description
pkt The packet to flush
Returns
true if the packet was flushed, false if the packet was queued
Remarks
None
5.8.13.7.1.5 TCPIP_ICMPV6_HeaderEchoRequestPut Function
C
IPV6_PACKET * TCPIP_ICMPV6_HeaderEchoRequestPut(
TCPIP_NET_HANDLE hNetIf,
IPV6_ADDR * localIP,
IPV6_ADDR * remoteIP,
uint8_t type,
uint16_t identifier,
uint16_t sequenceNumber
);
Description
Allocates a packet, IPv6 Header, and Upper-layer header for an ICMPv6 echo request.
Preconditions
None
Parameters
Parameters Description
pNetIf The interface for the outgoing packet.
localIP The local address that should be used for this packet.
remoteIP The packet's destination address
type Echo Request or Echo Reply
identifier The Echo Request id.
sequenceNumber The Echo request sequence number
Returns
IPV6_PACKET * - The constructed error packet or NULL
Remarks
None
5.8.13.7.2 Data Types and Constants
5.8.13.7.2.1 ICMPV6_ERR_PTB_CODE Macro
C
#define ICMPV6_ERR_PTB_CODE 0u
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Description
Definition for ICMPv6 Packet Too Big error code
5.8.13.7.2.2 ICMPV6_INFO_EREQ_CODE Macro
C
#define ICMPV6_INFO_EREQ_CODE 0u
Description
Definition for ICMPv6 Packet Echo Request info code
5.8.13.7.2.3 ICMPV6_INFO_ERPL_CODE Macro
C
#define ICMPV6_INFO_ERPL_CODE 0u
Description
Definition for ICMPv6 Packet Echo Reply info code
5.8.13.7.2.4 TCPIP_ICMPV6_PutHeaderEchoReply Macro
C
#define TCPIP_ICMPV6_PutHeaderEchoReply TCPIP_ICMPV6_HeaderEchoRequestPut
Description
This is macro TCPIP_ICMPV6_PutHeaderEchoReply.
5.8.13.7.2.5 ICMPV6_ERR_DU_CODE Enumeration
C
typedef enum {
ICMPV6_ERR_DU_NO_ROUTE = 0u,
ICMPV6_ERR_DU_PROHIBITED = 1u,
ICMPV6_ERR_DU_OUTSIDE_SCOPE = 2u,
ICMPV6_ERR_DU_ADDR_UNREACHABLE = 3u,
ICMPV6_ERR_DU_PORT_UNREACHABLE = 4u,
ICMPV6_ERR_DU_SRC_FAILED_INGRESS_POLICY = 5u,
ICMPV6_ERR_DU_REJECT_ROUTE = 6u
} ICMPV6_ERR_DU_CODE;
Description
Definitions for ICMPv6 Destination Unreachable error code
Members
Members Description
ICMPV6_ERR_DU_NO_ROUTE = 0u No route to destination
ICMPV6_ERR_DU_PROHIBITED = 1u Communication with destination administratively prohibited
ICMPV6_ERR_DU_OUTSIDE_SCOPE = 2u Beyond scope of source address
ICMPV6_ERR_DU_ADDR_UNREACHABLE = 3u Address unreachable
ICMPV6_ERR_DU_PORT_UNREACHABLE = 4u Port unreachable
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ICMPV6_ERR_DU_SRC_FAILED_INGRESS_POLICY
= 5u
Source address failed ingress/egress policy
ICMPV6_ERR_DU_REJECT_ROUTE = 6u Reject route to destination
5.8.13.7.2.6 ICMPV6_ERR_PP_CODE Enumeration
C
typedef enum {
ICMPV6_ERR_PP_ERRONEOUS_HEADER = 0u,
ICMPV6_ERR_PP_UNRECOGNIZED_NEXT_HEADER = 1u,
ICMPV6_ERR_PP_UNRECOGNIZED_IPV6_OPTION = 2u
} ICMPV6_ERR_PP_CODE;
Description
Definitions for ICMPv6 Parameter Problem error code
Members
Members Description
ICMPV6_ERR_PP_ERRONEOUS_HEADER = 0u Erroneous header field encountered
ICMPV6_ERR_PP_UNRECOGNIZED_NEXT_HEADER
= 1u
Unrecognized Next Header type encountered
ICMPV6_ERR_PP_UNRECOGNIZED_IPV6_OPTION
= 2u
Unrecognized IPv6 option encountered
5.8.13.7.2.7 ICMPV6_ERR_TE_CODE Enumeration
C
typedef enum {
ICMPV6_ERR_TE_HOP_LIMIT_EXCEEDED = 0u,
ICMPV6_ERR_TE_FRAG_ASSEMBLY_TIME_EXCEEDED = 1u
} ICMPV6_ERR_TE_CODE;
Description
Definitions for ICMPv6 Time Exceeded error code
Members
Members Description
ICMPV6_ERR_TE_HOP_LIMIT_EXCEEDED = 0u Hop limit exceeded in transit
ICMPV6_ERR_TE_FRAG_ASSEMBLY_TIME_EXCEEDED
= 1u
Fragment reassembly time exceeded
5.8.13.7.2.8 ICMPV6_HANDLE Type
C
typedef const void* ICMPV6_HANDLE;
Description
a handle that a client can use after the event handler has been registered
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5.8.13.7.2.9 ICMPV6_HEADER_ECHO Structure
C
typedef struct {
uint8_t vType;
uint8_t vCode;
uint16_t wChecksum;
uint16_t identifier;
uint16_t sequenceNumber;
} ICMPV6_HEADER_ECHO;
Description
Header for an ICMPv6 Echo Request/Reply packet
Members
Members Description
uint8_t vType; icmpV6 request or reply type
uint8_t vCode; Erro code
uint16_t wChecksum; Packet TX and RX checksum
uint16_t identifier; incoming and outgoing packet identifier
uint16_t sequenceNumber; request and reply sequence number
5.8.13.7.2.10 ICMPV6_HEADER_ERROR Structure
C
typedef struct {
uint8_t vType;
uint8_t vCode;
uint16_t wChecksum;
uint32_t additionalData;
} ICMPV6_HEADER_ERROR;
Description
Header for an ICMPv6 Error packet
Members
Members Description
uint8_t vType; icmpV6 request or reply type
uint8_t vCode; error code
uint16_t wChecksum; Packet TX and RX checksum
uint32_t additionalData; Unused for Dest. Unreachable and Time Exceeded. MTU for MTU. Pointer for
Parameter Problem.
5.8.13.7.2.11 ICMPV6_PACKET_TYPES Enumeration
C
typedef enum {
ICMPV6_ERROR_DEST_UNREACHABLE = 1u,
ICMPV6_ERROR_PACKET_TOO_BIG = 2u,
ICMPV6_ERROR_TIME_EXCEEDED = 3u,
ICMPV6_ERROR_PARAMETER_PROBLEM = 4u,
ICMPV6_INFO_ECHO_REQUEST = 128u,
ICMPV6_INFO_ECHO_REPLY = 129u,
ICMPV6_INFO_ROUTER_SOLICITATION = 133u,
ICMPV6_INFO_ROUTER_ADVERTISEMENT = 134u,
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ICMPV6_INFO_NEIGHBOR_SOLICITATION = 135u,
ICMPV6_INFO_NEIGHBOR_ADVERTISEMENT = 136u,
ICMPV6_INFO_REDIRECT = 137u
} ICMPV6_PACKET_TYPES;
Description
ICMPv6 packet types
Members
Members Description
ICMPV6_ERROR_DEST_UNREACHABLE = 1u Destination Unreachable error packet
ICMPV6_ERROR_PACKET_TOO_BIG = 2u Packet Too Big error packet
ICMPV6_ERROR_TIME_EXCEEDED = 3u Time Exceeded error packet
ICMPV6_ERROR_PARAMETER_PROBLEM =
4u
Parameter Problem error packet
ICMPV6_INFO_ECHO_REQUEST = 128u Echo Request packet
ICMPV6_INFO_ECHO_REPLY = 129u Echo Reply packet
ICMPV6_INFO_ROUTER_SOLICITATION =
133u
Router solicitation NDP packet
ICMPV6_INFO_ROUTER_ADVERTISEMENT =
134u
Router advertisement NDP packet
ICMPV6_INFO_NEIGHBOR_SOLICITATION =
135u
Neighbor Solicitation NDP packet
ICMPV6_INFO_NEIGHBOR_ADVERTISEMENT
= 136u
Neighbor Advertisement NDP packet
ICMPV6_INFO_REDIRECT = 137u Redirect NDP packet
5.8.13.8 Files
Files
Name Description
icmpv6.h IPv6 Internet Communication Message Protocol
icmpv6_config.h ICMPv6 configuration file
Description
5.8.13.8.1 icmpv6.h
Internet Control Message Protocol (ICMP) in IPv6 functions the same as ICMP in IPv4.ICMPv6 is used to report error messages
and information messages for IPv6 nodes. ICMP packets in IPv6 are used in the IPv6 neighbor discovery process, path MTU
discovery, and the Multicast Listener Discovery (MLD) protocol for IPv6.
Enumerations
Name Description
ICMPV6_ERR_DU_CODE Definitions for ICMPv6 Destination Unreachable error code
ICMPV6_ERR_PP_CODE Definitions for ICMPv6 Parameter Problem error code
ICMPV6_ERR_TE_CODE Definitions for ICMPv6 Time Exceeded error code
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ICMPV6_PACKET_TYPES ICMPv6 packet types
Functions
Name Description
TCPIP_ICMPV6_CallbackDeregister Deregisters an upper-layer function from ICMPv6 callback.
TCPIP_ICMPV6_CallbackRegister Registers an upper-layer function for ICMPv6 callback.
TCPIP_ICMPV6_Close This is function TCPIP_ICMPV6_Close.
TCPIP_ICMPV6_Flush Flushes an ICMPv6 Packet
TCPIP_ICMPV6_HeaderEchoRequestPut Allocates a packet, IPv6 Header, and Upper-layer header for an
ICMPv6 echo request.
Macros
Name Description
ICMPV6_ERR_PTB_CODE Definition for ICMPv6 Packet Too Big error code
ICMPV6_INFO_EREQ_CODE Definition for ICMPv6 Packet Echo Request info code
ICMPV6_INFO_ERPL_CODE Definition for ICMPv6 Packet Echo Reply info code
TCPIP_ICMPV6_PutHeaderEchoReply This is macro TCPIP_ICMPV6_PutHeaderEchoReply.
Structures
Name Description
ICMPV6_HEADER_ECHO Header for an ICMPv6 Echo Request/Reply packet
ICMPV6_HEADER_ERROR Header for an ICMPv6 Error packet
Types
Name Description
ICMPV6_HANDLE a handle that a client can use after the event handler has been registered
File Name
icmpv6.h
Company
Microchip Technology Incorporated
5.8.13.8.2 icmpv6_config.h
Internet Control Message Protocol for IPv6 (ICMPv6) Configuration file
This file contains the ICMPv6 module configuration options
Macros
Name Description
ICMPV6_TIMEOUT ICMPv6 Timeout Value
5.8.14 IPv4 TCP/IP Stack Library
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5.8.14.1 Introduction
Internet Protocol (IP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the IP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
IP is the workhorse protocol of the TCP/IP protocol suite. All TCP, UDP, ICMP, and IGMP data gets transmitted as IP datagrams
(Figure 1.4). IP provides an unreliable, connectionless datagram delivery service.
IP provides a best effort service. When something goes wrong, such as a router temporarily running out of buffers, IP has a
simple error handling algorithm: throw away the datagram and try to send an ICMP message back to the source. Any required
reliability must be provided by the upper layers (e.g., TCP).
The term connectionless means that IP does not maintain any state information about successive datagrams. Each datagram is
handled independently from all other datagrams. This also means that IP datagrams can get delivered out of order. If a source
sends two consecutive datagrams (first A, then B) to the same destination, each is routed independently and can take different
routes, with B arriving before A.
5.8.14.2 Release Notes
MPLAB Harmony Version: v0.70b IPv4 TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.14.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
5.8 TCP/IP Stack Library Help MPLAB Harmony Help IPv4 TCP/IP Stack Library
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To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.14.4 Using the Library
This topic describes the basic architecture of the IP TCPIP Stack Library and provides information and examples on how to use it.
Interface Header File: ip.h
The interface to the IPv4 TCP/IP Stack library is defined in the "ip.h" header file. This file is included by the "tcpip.h" file. Any C
language source (.c) file that uses the IPv4 TCP/IP Stack library should include "tcpip.h".
Library File:
The IPv4 TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.14.4.1 Abstraction Model
This library provides the API of the IPv4 TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
IPv4 Software Abstraction Block Diagram
This module provides software abstraction of the IPv4 module existent in any TCP/IP Stack implementation. It removes the
overhead of address resolution from all other modules in the stack.
Note: This diagram was not available at time of release and will be added in a future version of MPLAB Harmony.
5.8.14.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the IP module.
Library Interface Section Description
Functions Routines for configuring IPv4
Data Types and Constants This section provides various definitions describing this API
5.8.14.5 Configuring the Library
Macros
Name Description
IP_DEFAULT_ALLOCATION_BLOCK_SIZE Used to configure payload size
IPV4_QUEUED_PACKET_LIMIT This option defines the maximum number of queued IPv4 TX
packets. If an additional packet is queued, the oldest packet in the
queue will be removed.
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IPV4_QUEUED_PACKET_TIMEOUT This option defines the number of seconds an IPv4 TX packet will
remain in the queue before being timed out
IPV4_TASK_PROCESS_RATE default 1 second
Description
The configuration of the IPv4 TCP/IP Stack is based on the file sys_config.h
This header file contains the configuration selection for the IPv4 TCP/IP Stack. Based on the selections made, the IPv4 TCP/IP
Stack will support or not support selected features. These configuration settings will apply to all instances of the IPv4 TCP/IP
Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.14.5.1 IP_DEFAULT_ALLOCATION_BLOCK_SIZE Macro
C
#define IP_DEFAULT_ALLOCATION_BLOCK_SIZE (64u)
Description
Used to configure payload size
5.8.14.5.2 IPV4_QUEUED_PACKET_LIMIT Macro
C
#define IPV4_QUEUED_PACKET_LIMIT 4u
Description
This option defines the maximum number of queued IPv4 TX packets. If an additional packet is queued, the oldest packet in the
queue will be removed.
5.8.14.5.3 IPV4_QUEUED_PACKET_TIMEOUT Macro
C
#define IPV4_QUEUED_PACKET_TIMEOUT 10u
Description
This option defines the number of seconds an IPv4 TX packet will remain in the queue before being timed out
5.8.14.5.4 IPV4_TASK_PROCESS_RATE Macro
C
#define IPV4_TASK_PROCESS_RATE (1000) // default 1 second
Description
default 1 second
5.8.14.6 Building the Library
This section list the files that are available in the \src of the IP driver. It lists which files need to be included in the build based on
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either a hardware feature present on the board or configuration option selected by the system.
• ip.c
5.8.14.7 Library Interface
Data Types and Constants
Name Description
IPV4_HEADER None
IPV4_HEADER_TYPE None
IPV4_MODULE_CONFIG
IPV4_PACKET Packet structure/state tracking for IPv4 packets
Functions
Name Description
TCPIP_IPV4_PacketFormatTx Formats an IPV4 packet and makes it ready for transmission.
TCPIP_IPV4_PacketGetDestAddress Returns the IPv4 destination address associated with a
TCPIP_MAC_PACKET
TCPIP_IPV4_PacketGetSourceAddress Returns the IPv4 source address associated with a
TCPIP_MAC_PACKET
TCPIP_IPV4_PacketTransmit Transmits an IPV4 packet over the network.
TCPIP_IPV4_SelectSourceInterface Selects a source address and an interface based on the IPv4 destination
address
Description
This section describes the Application Programming Interface (API) functions of the IPv4 TCP/IP Stack Library.
Refer to each section for a detailed description.
5.8.14.7.1 Functions
5.8.14.7.1.1 TCPIP_IPV4_PacketFormatTx Function
C
void TCPIP_IPV4_PacketFormatTx(
IPV4_PACKET* pPkt,
uint8_t protocol,
uint16_t ipLen
);
Description
The necessary fields are set into the IPv4 packet.
Preconditions
Properly allocated pPkt. The source and destination addresses should be updated in the packet.
Parameters
Parameters Description
pPkt the packet to be formatted
protocol the protocol associated with the packet
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ipLoadLen the IPv4 packet payload length
Returns
None
Remarks
The segments should be properly updated with the right number of bytes (segLen). The ipLoadLen is added only to the 1st
segment of the packet! Other segments (for packets having multiple packets) are not touched.
5.8.14.7.1.2 TCPIP_IPV4_PacketGetDestAddress Function
C
__inline__ const IPV4_ADDR* TCPIP_IPV4_PacketGetDestAddress(
TCPIP_MAC_PACKET* pPkt
);
Description
The function will return a pointer to where the IPv4 destination address is located in the TCPIP_MAC_PACKET. The
TCPIP_MAC_PACKET is supposed to be a valid IPv4 packet that has properly destination address set.
Preconditions
pPkt - valid IPv4 packet, pNetLayer filed properly set
Parameters
Parameters Description
pPkt packet to query
Returns
a valid pointer to an IPV4_ADDR if it succeeds 0 - if call failed
Remarks
This function is mainly meant for RX packets.
5.8.14.7.1.3 TCPIP_IPV4_PacketGetSourceAddress Function
C
__inline__ const IPV4_ADDR* TCPIP_IPV4_PacketGetSourceAddress(
TCPIP_MAC_PACKET* pPkt
);
Description
The function will return a pointer to where the IPv4 source address is located in the TCPIP_MAC_PACKET. The
TCPIP_MAC_PACKET is supposed to be a valid IPv4 packet that has properly source address set.
Preconditions
pPkt - valid IPv4 packet, pNetLayer filed properly set
Parameters
Parameters Description
pPkt packet to query
Returns
a valid pointer to an IPV4_ADDR if it succeeds 0 - if call failed
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Remarks
This function is mainly meant for RX packets.
5.8.14.7.1.4 TCPIP_IPV4_PacketTransmit Function
C
bool TCPIP_IPV4_PacketTransmit(
IPV4_PACKET* pPkt
);
Description
The IPv4 packet is sent to the MAC for transmission.
Preconditions
pPkt should have been properly formatted with TCPIP_IPV4_PacketFormatTx(). The packet interface should be updated.
Parameters
Parameters Description
pPkt the packet to be transmitted
Returns
true - if the packet was handed to the MAC or is queued for transmission false - the packet cannot be transmitted (wrong
interface, etc.)
Remarks
Only single packets can be transmitted. Chained packets are not supported for now.
5.8.14.7.1.5 TCPIP_IPV4_SelectSourceInterface Function
C
TCPIP_NET_HANDLE TCPIP_IPV4_SelectSourceInterface(
TCPIP_NET_HANDLE netH,
IPV4_ADDR* pDestAddress,
IPV4_ADDR* pSrcAddress,
bool srcSet
);
Description
Updates the pSrcAddress and returns the needed interface, if successful if srcSet == 1 and netH != 0 the function won't change
anything if srcSet == 1 and netH == 0 then the call will never fail it will use whatever value in pSrcAddress (even 0) and will try to
come up with an appropriate interface. if srcSet == 0 and netH == 0 it will use the destination address if srcSet == 0 and netH !=
0 it will use the address of that interface
Preconditions
netH has to be valid (if non 0)
Parameters
Parameters Description
netH network interface handle
pDestAddress pointer to destination address
pSrcAddress pointer to source address
srcSet boolean; true if address pointed by pSrcAddress is valid
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Returns
a valid interface - if it succeeds and a valid source interface selected 0 - interface selection failed
Remarks
None
5.8.14.7.2 Data Types and Constants
5.8.14.7.2.1 IPV4_HEADER Structure
C
typedef struct {
uint8_t VersionIHL;
uint8_t TypeOfService;
uint16_t TotalLength;
uint16_t Identification;
uint16_t FragmentInfo;
uint8_t TimeToLive;
uint8_t Protocol;
uint16_t HeaderChecksum;
IPV4_ADDR SourceAddress;
IPV4_ADDR DestAddress;
} IPV4_HEADER;
Description
IPv4 packet header definition
None
Remarks
None
5.8.14.7.2.2 IPV4_HEADER_TYPE Enumeration
C
typedef enum {
IP_PROT_ICMP = (1u),
IP_PROT_TCP = (6u),
IP_PROT_UDP = (17u)
} IPV4_HEADER_TYPE;
Description
IPv4 supported protocols
None
Remarks
None
5.8.14.7.2.3 IPV4_MODULE_CONFIG Structure
C
typedef struct {
} IPV4_MODULE_CONFIG;
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5.8.14.7.2.4 IPV4_PACKET Structure
C
typedef struct {
TCPIP_MAC_PACKET macPkt;
IPV4_ADDR srcAddress;
IPV4_ADDR destAddress;
TCPIP_NET_HANDLE netIfH;
IPV4_ADDR arpTarget;
} IPV4_PACKET;
Description
Packet structure/state tracking for IPv4 packets
Members
Members Description
TCPIP_MAC_PACKET macPkt; standard MAC packet header safe cast to TCPIP_MAC_PACKET
IPV4_ADDR srcAddress; packet source
IPV4_ADDR destAddress; packet destination
TCPIP_NET_HANDLE netIfH; packet interface
IPV4_ADDR arpTarget; ARP resolution target
5.8.14.8 Files
Files
Name Description
ip_config.h IP configuration file
ipv4.h
Description
5.8.14.8.1 ip_config.h
Internet Protocol (IP) Configuration file
This file contains the IP module configuration options
Macros
Name Description
IP_DEFAULT_ALLOCATION_BLOCK_SIZE Used to configure payload size
IPV4_QUEUED_PACKET_LIMIT This option defines the maximum number of queued IPv4
TX packets. If an additional packet is queued, the oldest
packet in the queue will be removed.
IPV4_QUEUED_PACKET_TIMEOUT This option defines the number of seconds an IPv4 TX
packet will remain in the queue before being timed out
IPV4_TASK_PROCESS_RATE default 1 second
IPV6_DEFAULT_BASE_REACHABLE_TIME 30 seconds
IPV6_DEFAULT_CUR_HOP_LIMIT (IPv4 Time-to-Live parameter)
IPV6_DEFAULT_LINK_MTU Default Maximum Transmission Unit
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IPV6_DEFAULT_RETRANSMIT_TIME 1 second
IPV6_INIT_TASK_PROCESS_RATE default 32 ms
IPV6_MINIMUM_LINK_MTU Sets the lower bounds of the the Maximum Transmission
Unit
IPV6_NEIGHBOR_CACHE_ENTRY_STALE_TIMEOUT 10 minutes
IPV6_QUEUE_MCAST_PACKET_LIMIT This option defines the maximum number of multicast
queued IPv6 If an additional packet is queued, the oldest
packet in the queue will be removed.
IPV6_QUEUE_NEIGHBOR_PACKET_LIMIT This option defines the maximum number of queued
packets per remote. If an additional packet needs to be
queued, the oldest packet in the queue will be removed.
IPV6_QUEUED_MCAST_PACKET_TIMEOUT This option defines the number of seconds an IPv6
multicast packet will remain in the queue before being
timed out
IPV6_TASK_PROCESS_RATE default 1 second
IPV6_ULA_NTP_ACCESS_TMO NTP access timeout for the IPv6 ULA address
generation, ms
IPV6_ULA_NTP_VALID_WINDOW the NTP time stamp validity window, ms if a stamp was
obtained outside this interval from the moment of the
request a new request wil be issued
5.8.14.8.2 ipv4.h
IPv4 Defs for Microchip TCP/IP Stack
Enumerations
Name Description
IPV4_HEADER_TYPE None
Functions
Name Description
TCPIP_IPV4_PacketFormatTx Formats an IPV4 packet and makes it ready for transmission.
TCPIP_IPV4_PacketGetDestAddress Returns the IPv4 destination address associated with a
TCPIP_MAC_PACKET
TCPIP_IPV4_PacketGetSourceAddress Returns the IPv4 source address associated with a
TCPIP_MAC_PACKET
TCPIP_IPV4_PacketTransmit Transmits an IPV4 packet over the network.
TCPIP_IPV4_SelectSourceInterface Selects a source address and an interface based on the IPv4 destination
address
Structures
Name Description
IPV4_HEADER None
IPV4_MODULE_CONFIG
IPV4_PACKET Packet structure/state tracking for IPv4 packets
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5.8.15 IPv6 TCP/IP Stack Library
5.8.15.1 Introduction
Internet Protocol (IP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the IPv6 TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
IPv6 is the workhorse protocol of the TCP/IP protocol suite. All TCP, UDP, ICMP, and IGMP data gets transmitted as IP
datagrams (Figure 1.4). IP provides an unreliable, connectionless datagram delivery service.
IPv6 provides a best effort service. When something goes wrong, such as a router temporarily running out of buffers, IPv6 has a
simple error handling algorithm: throw away the datagram and try to send an ICMP message back to the source. Any required
reliability must be provided by the upper layers (e.g., TCP).
The term connectionless means that IPv6 does not maintain any state information about successive datagrams. Each datagram
is handled independently from all other datagrams. This also means that IPv6 datagrams can get delivered out of order. If a
source sends two consecutive datagrams (first A, then B) to the same destination, each is routed independently and can take
different routes, with B arriving before A.
5.8.15.2 Release Notes
MPLAB Harmony Version: v0.70b IPv6 TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.15.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
5.8 TCP/IP Stack Library Help MPLAB Harmony Help IPv6 TCP/IP Stack Library
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YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.15.4 Using the Library
This topic describes the basic architecture of the IPv6 TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: ip.h
The interface to the IPv6 TCP/IP Stack library is defined in the "ip.h" header file. This file is included by the "tcpip.h" file. Any C
language source (.c) file that uses the IPv6 TCP/IP Stack library should include "tcpip.h".
Library File:
The IPv6 TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.15.4.1 Abstraction Model
This library provides the API of the IP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
IP Software Abstraction Block Diagram
This module provides software abstraction of the IP module existent in any TCP/IP Stack implementation. It removes the
overhead of address resolution from all other modules in the stack.
Note: This diagram was not available at time of release and will be added in a future version of MPLAB Harmony.
5.8.15.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the IP module.
Library Interface Section Description
Functions Routines for Configuring IPv6
Data Types and Constants This section provides various definitions describing this API
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5.8.15.5 Configuring the Library
Macros
Name Description
IPV6_INIT_TASK_PROCESS_RATE default 32 ms
IPV6_MINIMUM_LINK_MTU Sets the lower bounds of the the Maximum Transmission
Unit
IPV6_NEIGHBOR_CACHE_ENTRY_STALE_TIMEOUT 10 minutes
IPV6_QUEUE_MCAST_PACKET_LIMIT This option defines the maximum number of multicast
queued IPv6 If an additional packet is queued, the oldest
packet in the queue will be removed.
IPV6_QUEUE_NEIGHBOR_PACKET_LIMIT This option defines the maximum number of queued
packets per remote. If an additional packet needs to be
queued, the oldest packet in the queue will be removed.
IPV6_QUEUED_MCAST_PACKET_TIMEOUT This option defines the number of seconds an IPv6
multicast packet will remain in the queue before being
timed out
IPV6_TASK_PROCESS_RATE default 1 second
IPV6_ULA_NTP_ACCESS_TMO NTP access timeout for the IPv6 ULA address
generation, ms
IPV6_ULA_NTP_VALID_WINDOW the NTP time stamp validity window, ms if a stamp was
obtained outside this interval from the moment of the
request a new request wil be issued
IPV6_DEFAULT_BASE_REACHABLE_TIME 30 seconds
IPV6_DEFAULT_CUR_HOP_LIMIT (IPv4 Time-to-Live parameter)
IPV6_DEFAULT_LINK_MTU Default Maximum Transmission Unit
IPV6_DEFAULT_RETRANSMIT_TIME 1 second
Description
The configuration of the IPv6 TCP/IP Stack is based on the file sys_config.h
This header file contains the configuration selection for the IPv6 TCP/IP Stack. Based on the selections made, the IPv6 TCP/IP
Stack will support or not support selected features. These configuration settings will apply to all instances of the IPv6 TCP/IP
Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.15.5.1 IPV6_INIT_TASK_PROCESS_RATE Macro
C
#define IPV6_INIT_TASK_PROCESS_RATE (32) // default 32 ms
Description
default 32 ms
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5.8.15.5.2 IPV6_MINIMUM_LINK_MTU Macro
C
#define IPV6_MINIMUM_LINK_MTU 1280u
Description
Sets the lower bounds of the the Maximum Transmission Unit
5.8.15.5.3 IPV6_NEIGHBOR_CACHE_ENTRY_STALE_TIMEOUT Macro
C
#define IPV6_NEIGHBOR_CACHE_ENTRY_STALE_TIMEOUT 600ul // 10 minutes
Description
10 minutes
5.8.15.5.4 IPV6_QUEUE_MCAST_PACKET_LIMIT Macro
C
#define IPV6_QUEUE_MCAST_PACKET_LIMIT 4
Description
This option defines the maximum number of multicast queued IPv6 If an additional packet is queued, the oldest packet in the
queue will be removed.
5.8.15.5.5 IPV6_QUEUE_NEIGHBOR_PACKET_LIMIT Macro
C
#define IPV6_QUEUE_NEIGHBOR_PACKET_LIMIT 1
Description
This option defines the maximum number of queued packets per remote. If an additional packet needs to be queued, the oldest
packet in the queue will be removed.
5.8.15.5.6 IPV6_QUEUED_MCAST_PACKET_TIMEOUT Macro
C
#define IPV6_QUEUED_MCAST_PACKET_TIMEOUT 10u
Description
This option defines the number of seconds an IPv6 multicast packet will remain in the queue before being timed out
5.8.15.5.7 IPV6_TASK_PROCESS_RATE Macro
C
#define IPV6_TASK_PROCESS_RATE (1000) // default 1 second
Description
default 1 second
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5.8.15.5.8 IPV6_ULA_NTP_ACCESS_TMO Macro
C
#define IPV6_ULA_NTP_ACCESS_TMO (12000)
Description
NTP access timeout for the IPv6 ULA address generation, ms
5.8.15.5.9 IPV6_ULA_NTP_VALID_WINDOW Macro
C
#define IPV6_ULA_NTP_VALID_WINDOW (1000)
Description
the NTP time stamp validity window, ms if a stamp was obtained outside this interval from the moment of the request a new
request wil be issued
5.8.15.5.10 IPV6_DEFAULT_BASE_REACHABLE_TIME Macro
C
#define IPV6_DEFAULT_BASE_REACHABLE_TIME 30u
Description
30 seconds
5.8.15.5.11 IPV6_DEFAULT_CUR_HOP_LIMIT Macro
C
#define IPV6_DEFAULT_CUR_HOP_LIMIT 64u
Description
(IPv4 Time-to-Live parameter)
5.8.15.5.12 IPV6_DEFAULT_LINK_MTU Macro
C
#define IPV6_DEFAULT_LINK_MTU 1500u
Description
Default Maximum Transmission Unit
5.8.15.5.13 IPV6_DEFAULT_RETRANSMIT_TIME Macro
C
#define IPV6_DEFAULT_RETRANSMIT_TIME 1000u
Description
1 second
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5.8.15.6 Building the Library
This section list the files that are available in the \src of the IP driver. It lists which files need to be included in the build based on
either a hardware feature present on the board or configuration option selected by the system.
• ip.c
5.8.15.7 Library Interface
Data Types and Constants
Name Description
IP_VERSION_4 Using IPv4
IP_VERSION_6 Using IPv6
IPV6_DATA_DYNAMIC_BUFFER Data to transmit is allocated in dynamically allocated RAM
IPV6_DATA_NETWORK_FIFO Data to transmit is stored in the Network Controller's FIFOs
IPV6_DATA_NONE The data segment is unused
IPV6_DATA_PIC_RAM Data to transmit is stored in PIC RAM
IPV6_HEADER_OFFSET_DEST_ADDR Header offset for destination address
IPV6_HEADER_OFFSET_NEXT_HEADER Header offset for next header
IPV6_HEADER_OFFSET_PAYLOAD_LENGTH Header offset for payload length
IPV6_HEADER_OFFSET_SOURCE_ADDR Header offset for source address
IPV6_NO_UPPER_LAYER_CHECKSUM Value flag for no upper layer checksum
IPV6_TLV_HBHO_PAYLOAD_JUMBOGRAM IPv6 Type-length-value type code for the Hop-by-hop
"Jumbogram Payload" option
IPV6_TLV_HBHO_ROUTER_ALERT IPv6 Type-length-value type code for the Hop-by-hop "Router
Alert" option
IPV6_TLV_PAD_1 IPv6 Type-length-value type code for the Pad 1 option
IPV6_TLV_PAD_N IPv6 Type-length-value type code for the Pad N option
IPV6_TLV_UNREC_OPT_DISCARD_PP IPv6 action code for the unrecognized option reaction to
discard the packet and send an ICMP parameter problem
message
IPV6_TLV_UNREC_OPT_DISCARD_PP_NOT_MC IPv6 action code for the unrecognized option reaction to
discard the packet and send an ICMP parameter problem
message is the destination addr isn't a multicast address
IPV6_TLV_UNREC_OPT_DISCARD_SILENT IPv6 action code for the unrecognized option reaction to
discard the packet silently
IPV6_TLV_UNREC_OPT_SKIP_OPTION IPv6 action code for the unrecognized option reaction to skip
the option
TCPIP_IPV6_PutArray Writes data to a packet
IPV6_ACTION Provides a list of possible IPv6 actions.
IPV6_ADDRESS_POLICY
IPV6_ADDRESS_PREFERENCE Provides selection of public versus temporary addresses.
IPV6_ADDRESS_TYPE Data structure for IPv6 addresses.
IPV6_DATA_SEGMENT_HEADER
IPV6_EVENT_HANDLER Clients can register a handler with the IPv6 service.
IPV6_EVENT_TYPE None
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IPV6_FRAGMENT_HEADER
IPV6_HANDLE Pointer to IPv6 object
IPV6_HEADER None
IPV6_MODULE_CONFIG Provides a placeholdef for IPv6 configuration.
IPV6_NEXT_HEADER_TYPE Defines a list of next header types
IPV6_PACKET Packet structure/state tracking for IPv6 packets
IPV6_PACKET_ACK_FNC None
IPV6_RX_FRAGMENT_BUFFER
IPV6_SEGMENT_TYPE Provides an enumeration of IPv6 segment types.
IPV6_TLV_OPTION_TYPE Data structure for IPv6 TLV options.
IPV6_ULA_FLAGS Provides a list of possible flags for the Unique Local Address
(ULA) generation.
IPV6_ULA_RESULT Provides a list of possible results for the Unique Local
Address (ULA) generation.
Functions
Name Description
TCPIP_IPV6_AddressUnicastRemove Removed a configured unicast address from an interface.
TCPIP_IPV6_ArrayGet Reads the next byte of data from the specified MAC.
TCPIP_IPV6_ArrayPutHelper Helper function to write data to a packet.
TCPIP_IPV6_DASSourceAddressSelect Determines the appropriate source address for a given destination
address.
TCPIP_IPV6_DestAddressGet Gets the destination address for an IPv6 packet.
TCPIP_IPV6_DestAddressSet Sets the destination address for an IPv6 packet.
TCPIP_IPV6_Flush Flushes an IP TX packet.
TCPIP_IPV6_Get Reads the next byte of data from the specified MAC.
TCPIP_IPV6_HandlerDeregister Deregisters an IPv6 event handler callback function.
TCPIP_IPV6_HandlerRegister Registers an IPv6 event handler callback function.
TCPIP_IPV6_InterfaceIsReady Determines if an interface is ready for IPv6 transactions.
TCPIP_IPV6_MulticastListenerAdd Adds a multicast listener to an interface.
TCPIP_IPV6_MulticastListenerRemove Removes a multicast listener from a given interface.
TCPIP_IPV6_PacketFree Frees a TCP/IP Packet structure from dynamic memory.
TCPIP_IPV6_PayloadSet Allocates a segment on the end of a packet segment chain and
uses it to address pre-buffered data.
TCPIP_IPV6_Put Writes a character of data to a packet.
TCPIP_IPV6_SourceAddressGet Gets the source address for an IPv6 packet.
TCPIP_IPV6_SourceAddressSet Sets the source address for an IPv6 packet.
TCPIP_IPV6_TxIsPutReady Determines whether a TX packet can be written to.
TCPIP_IPV6_TxPacketAllocate Dynamically allocates a packet for transmitting IP protocol data.
TCPIP_IPV6_UnicastAddressAdd Adds a unicast address to a specified interface
TCPIP_IPV6_UniqueLocalUnicastAddressAdd Adds a Unique Local Unicast Address (ULA) to a specified interface
Description
This section describes the Application Programming Interface (API) functions of the IPv6 TCP/IP Stack Library.
Refer to each section for a detailed description.
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5.8.15.7.1 Functions
5.8.15.7.1.1 TCPIP_IPV6_AddressUnicastRemove Function
C
void TCPIP_IPV6_AddressUnicastRemove(
TCPIP_NET_HANDLE netH,
IPV6_ADDR * address
);
Description
Removed a configured unicast address from an interface.
Preconditions
None
Parameters
Parameters Description
netH The interface.
address The address
Returns
None
Remarks
None
5.8.15.7.1.2 TCPIP_IPV6_ArrayGet Function
C
uint8_t TCPIP_IPV6_ArrayGet(
TCPIP_MAC_PACKET* pRxPkt,
uint8_t * val,
uint16_t len
);
Description
Reads a character of data from a packet.
Preconditions
None
Parameters
Parameters Description
pRxPkt The MAC RX packet to read data from
val The buffer to store the data
len The amount of data to read
Returns
uint8_t - The number of bytes read.
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Remarks
None
5.8.15.7.1.3 TCPIP_IPV6_ArrayPutHelper Function
C
unsigned short TCPIP_IPV6_ArrayPutHelper(
IPV6_PACKET * pkt,
const void * dataSource,
uint8_t dataType,
unsigned short len
);
Description
Helper function to write data to a packet.
Preconditions
None
Parameters
Parameters Description
ptrPacket The packet.
dataSource The address of the data on its medium.
dataType Descriptor of the data type (dynamic memory on PIC, in a network FIFO, in static
PIC RAM)
len Length of the data.
Returns
unsigned short - The number of bytes of data written.
Remarks
None
5.8.15.7.1.4 TCPIP_IPV6_DASSourceAddressSelect Function
C
IPV6_ADDR_STRUCT * TCPIP_IPV6_DASSourceAddressSelect(
TCPIP_NET_HANDLE hNetIf,
IPV6_ADDR * dest,
IPV6_ADDR * requestedSource
);
Description
Determines the appropriate source address for a given destination address.
Preconditions
None
Parameters
Parameters Description
hNetIf The given interface.
dest The destination address.
requestedSource A specified source.
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Returns
IPV6_ADDR_STRUCT * - The selected source address.
Remarks
None
5.8.15.7.1.5 TCPIP_IPV6_DestAddressGet Function
C
IPV6_ADDR * TCPIP_IPV6_DestAddressGet(
IPV6_PACKET * p
);
Description
Gets the destination address for an IPv6 packet.
Preconditions
None.
Parameters
Parameters Description
p pointer to IPv6 packet
Returns
Destination address.
Remarks
None.
5.8.15.7.1.6 TCPIP_IPV6_DestAddressSet Function
C
void TCPIP_IPV6_DestAddressSet(
IPV6_PACKET * p,
const IPV6_ADDR * addr
);
Description
Sets the destination address for an IPv6 packet.
Preconditions
None.
Parameters
Parameters Description
p pointer to IPv6 packet
addrValue destination address
Returns
None.
Remarks
None
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5.8.15.7.1.7 TCPIP_IPV6_Flush Function
C
int TCPIP_IPV6_Flush(
IPV6_PACKET * pkt
);
Description
Flushes an IP TX packet. Determines the link-layer address if necessary. Calculates the upper-layer checksum if necessary.
Preconditions
None
Parameters
Parameters Description
ptrPacket The packet to flush.
Returns
1 - if the packet has been transmitted 0 - if the packet has been queued. < 0 - if the packet has been discarded for some error
Remarks
None
5.8.15.7.1.8 TCPIP_IPV6_Get Function
C
uint8_t TCPIP_IPV6_Get(
TCPIP_MAC_PACKET* pRxPkt,
uint8_t* pData
);
Description
Reads a character of data from a packet.
Preconditions
None
Parameters
Parameters Description
pRxPkt The MAC RX packet to read data from
Returns
The data read.
Remarks
None
5.8.15.7.1.9 TCPIP_IPV6_HandlerDeregister Function
C
bool TCPIP_IPV6_HandlerDeregister(
IPV6_HANDLE hIpv6
);
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Description
Deregisters an IPv6 event handler callback function.
Preconditions
None
Parameters
Parameters Description
hIpv6 Handle to registered callback
Returns
true - if deregister successful false - otherwise.
Remarks
None
5.8.15.7.1.10 TCPIP_IPV6_HandlerRegister Function
C
IPV6_HANDLE TCPIP_IPV6_HandlerRegister(
TCPIP_NET_HANDLE hNet,
IPV6_EVENT_HANDLER handler,
const void* hParam
);
Description
Registers an IPv6 event handler callback function.
Preconditions
None
Parameters
Parameters Description
netH The interface
handler event handler
hParam
Returns
Handle to registered callback.
Remarks
None
5.8.15.7.1.11 TCPIP_IPV6_InterfaceIsReady Function
C
bool TCPIP_IPV6_InterfaceIsReady(
TCPIP_NET_HANDLE netH
);
Description
Determines if an interface is ready for IPv6 transactions.
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Preconditions
None
Parameters
Parameters Description
pNetIf The interface to check
Returns
true if the interface has IPv6 functionality available, false otherwise
Remarks
None
5.8.15.7.1.12 TCPIP_IPV6_MulticastListenerAdd Function
C
IPV6_ADDR_STRUCT * TCPIP_IPV6_MulticastListenerAdd(
TCPIP_NET_HANDLE hNet,
IPV6_ADDR * address
);
Description
Adds a multicast listener to an interface.
Preconditions
None
Parameters
Parameters Description
pNetIf The interface to add the address to.
address The new listener
Returns
IPV6_ADDR_STRUCT * - Pointer to the new listener, or NULL
Remarks
None
5.8.15.7.1.13 TCPIP_IPV6_MulticastListenerRemove Function
C
void TCPIP_IPV6_MulticastListenerRemove(
TCPIP_NET_HANDLE netH,
IPV6_ADDR * address
);
Description
Removes a multicast listener from a given interface.
Preconditions
None
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Parameters
Parameters Description
netH The interface
address The address
Returns
None
Remarks
None
5.8.15.7.1.14 TCPIP_IPV6_PacketFree Function
C
void TCPIP_IPV6_PacketFree(
IPV6_PACKET * pkt
);
Description
Frees a TCP/IP Packet structure from dynamic memory.
Preconditions
None
Parameters
Parameters Description
ptrPacket The packet to free.
Returns
None
Remarks
None
5.8.15.7.1.15 TCPIP_IPV6_PayloadSet Function
C
unsigned short TCPIP_IPV6_PayloadSet(
IPV6_PACKET * pkt,
uint8_t* payload,
unsigned short len
);
Description
This function will allocate a data segment header and append it to the end of a chain of segments in a TX packet. It will set the
data ptr in the packet segment to a pre-existing buffer of data.
Preconditions
None
Parameters
Parameters Description
ptrPacket The packet.
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payload Address of the data payload.
len Length of the data payload
Returns
unsigned short - The amount of data added to the packet length.
Remarks
This function is useful for adding payloads to outgoing packets without copying them if the data is in another preexisting buffer
(i.e. TCP).
5.8.15.7.1.16 TCPIP_IPV6_Put Function
C
bool TCPIP_IPV6_Put(
IPV6_PACKET * pkt,
unsigned char v
);
Description
Writes a character of data to a packet.
Preconditions
None
Parameters
Parameters Description
pkt The packet.
v The characeter.
Returns
true if the character was written, false otherwise
Remarks
None
5.8.15.7.1.17 TCPIP_IPV6_SourceAddressGet Function
C
IPV6_ADDR * TCPIP_IPV6_SourceAddressGet(
IPV6_PACKET * p
);
Description
Gets the source address for an IPv6 packet.
Parameters
Parameters Description
p pointer to IPv6 packet
Returns
Source address.
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Remarks
None.
5.8.15.7.1.18 TCPIP_IPV6_SourceAddressSet Function
C
void TCPIP_IPV6_SourceAddressSet(
IPV6_PACKET * p,
const IPV6_ADDR * addr
);
Description
Sets the source address for an IPv6 packet.
Preconditions
None.
Parameters
Parameters Description
p pointer to IPv6 packet
addrValue source address
Returns
None.
Remarks
None
5.8.15.7.1.19 TCPIP_IPV6_TxIsPutReady Function
C
unsigned short TCPIP_IPV6_TxIsPutReady(
IPV6_PACKET * pkt,
unsigned short count
);
Description
Determines whether a TX packet can be written to. This function will allocate additional space to the packet to accomodate the
user.
Preconditions
None
Parameters
Parameters Description
ptrPacket The packet to check.
count The amount of writable space to check for,
Returns
unsigned short - The amount of space available.
Remarks
None
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5.8.15.7.1.20 TCPIP_IPV6_TxPacketAllocate Function
C
IPV6_PACKET * TCPIP_IPV6_TxPacketAllocate(
TCPIP_NET_HANDLE netH,
IPV6_PACKET_ACK_FNC ackFnc,
void* ackParam
);
Description
Dynamically allocates a packet for transmitting IP protocol data.
Preconditions
None
Parameters
Parameters Description
netH Interface of the outgoing packet.
ackFnc function to be called when IP is done with the TX packet (finished transmitting)
ackParam parameter to be used for this callback This has meaning only for the caller of the
TCPIP_IPV6_TxPacketAllocate
Returns
IPV6_PACKET * - Pointer to the allocated packet.
Remarks
None
5.8.15.7.1.21 TCPIP_IPV6_UnicastAddressAdd Function
C
IPV6_ADDR_STRUCT * TCPIP_IPV6_UnicastAddressAdd(
TCPIP_NET_HANDLE netH,
IPV6_ADDR * address,
uint8_t skipProcessing
);
Description
Adds a unicast address to a specified interface. Starts duplicate address detection if necessary.
Preconditions
None
Parameters
Parameters Description
netH The interface to add the address to.
address The address to add.
skipProcessing true to skip Duplicate address detection, false otherwise
Returns
IPV6_ADDR_STRUCT * - Pointer to the structure of the newly allocated address
Remarks
None
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5.8.15.7.1.22 TCPIP_IPV6_UniqueLocalUnicastAddressAdd Function
C
IPV6_ULA_RESULT TCPIP_IPV6_UniqueLocalUnicastAddressAdd(
TCPIP_NET_HANDLE netH,
uint16_t subnetID,
IPV6_ULA_FLAGS genFlags,
IP_MULTI_ADDRESS* ntpAddress
);
Description
This function starts the process of adding an ULA address to the specified interface. The segments of the generated address are
as follows: FC00::/7 - ULA prefix L - 1 bit set to 1, locally assigned Global ID - 40 bit random generated identifier subnet ID - 16
bit subnet identifier Interface ID - 64 bit interface identifier generated as a EUI64 from the specified interface MAC.
The randomness of the "Global ID" prefix of the generated IPv6 address is obtained by using an NTP server. The supplied NTP
server will be contacted to obtain an NTP timestamp. This timestamp together with the EUI64 identifier obtained from the
interface MAC are passed through a 160 bits hash alhorithm (SHA1) and the least seigbificant 40 bits are used as the GlobalID
of the interface.
Preconditions
None
Parameters
Parameters Description
netH the interface to add the address to.
subnetID the subnet ID to be used.
5.8.15.7.2 Data Types and Constants
5.8.15.7.2.1 IP_VERSION_4 Macro
C
#define IP_VERSION_4 (0u) // Using IPv4
Description
Using IPv4
5.8.15.7.2.2 IP_VERSION_6 Macro
C
#define IP_VERSION_6 (1u) // Using IPv6
Description
Using IPv6
5.8.15.7.2.3 IPV6_DATA_DYNAMIC_BUFFER Macro
C
#define IPV6_DATA_DYNAMIC_BUFFER (0x1u) // Data to transmit is allocated in
dynamically allocated RAM
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Description
Data to transmit is allocated in dynamically allocated RAM
5.8.15.7.2.4 IPV6_DATA_NETWORK_FIFO Macro
C
#define IPV6_DATA_NETWORK_FIFO (0x2u) // Data to transmit is stored in the Network
Controller's FIFOs
Description
Data to transmit is stored in the Network Controller's FIFOs
5.8.15.7.2.5 IPV6_DATA_NONE Macro
C
#define IPV6_DATA_NONE (0x0u) // The data segment is unused
Description
The data segment is unused
5.8.15.7.2.6 IPV6_DATA_PIC_RAM Macro
C
#define IPV6_DATA_PIC_RAM (0x3u) // Data to transmit is stored in PIC RAM
Description
Data to transmit is stored in PIC RAM
5.8.15.7.2.7 IPV6_HEADER_OFFSET_DEST_ADDR Macro
C
#define IPV6_HEADER_OFFSET_DEST_ADDR (0x08u + sizeof (IPV6_ADDR)) // Header offset for
destination address
Description
Header offset for destination address
5.8.15.7.2.8 IPV6_HEADER_OFFSET_NEXT_HEADER Macro
C
#define IPV6_HEADER_OFFSET_NEXT_HEADER (0x06u) // Header offset for next header
Description
Header offset for next header
5.8.15.7.2.9 IPV6_HEADER_OFFSET_PAYLOAD_LENGTH Macro
C
#define IPV6_HEADER_OFFSET_PAYLOAD_LENGTH (0x04u) // Header offset for payload length
Description
Header offset for payload length
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5.8.15.7.2.10 IPV6_HEADER_OFFSET_SOURCE_ADDR Macro
C
#define IPV6_HEADER_OFFSET_SOURCE_ADDR (0x08u) // Header offset for source address
Description
Header offset for source address
5.8.15.7.2.11 IPV6_NO_UPPER_LAYER_CHECKSUM Macro
C
#define IPV6_NO_UPPER_LAYER_CHECKSUM (0xFFFFu) // Value flag for no upper layer checksum
Description
Value flag for no upper layer checksum
5.8.15.7.2.12 IPV6_TLV_HBHO_PAYLOAD_JUMBOGRAM Macro
C
#define IPV6_TLV_HBHO_PAYLOAD_JUMBOGRAM 0xC2u
Description
IPv6 Type-length-value type code for the Hop-by-hop "Jumbogram Payload" option
5.8.15.7.2.13 IPV6_TLV_HBHO_ROUTER_ALERT Macro
C
#define IPV6_TLV_HBHO_ROUTER_ALERT 0x05u
Description
IPv6 Type-length-value type code for the Hop-by-hop "Router Alert" option
5.8.15.7.2.14 IPV6_TLV_PAD_1 Macro
C
#define IPV6_TLV_PAD_1 0u
Description
IPv6 Type-length-value type code for the Pad 1 option
5.8.15.7.2.15 IPV6_TLV_PAD_N Macro
C
#define IPV6_TLV_PAD_N 1u
Description
IPv6 Type-length-value type code for the Pad N option
5.8.15.7.2.16 IPV6_TLV_UNREC_OPT_DISCARD_PP Macro
C
#define IPV6_TLV_UNREC_OPT_DISCARD_PP 0b10
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Description
IPv6 action code for the unrecognized option reaction to discard the packet and send an ICMP parameter problem message
5.8.15.7.2.17 IPV6_TLV_UNREC_OPT_DISCARD_PP_NOT_MC Macro
C
#define IPV6_TLV_UNREC_OPT_DISCARD_PP_NOT_MC 0b11
Description
IPv6 action code for the unrecognized option reaction to discard the packet and send an ICMP parameter problem message is
the destination addr isn't a multicast address
5.8.15.7.2.18 IPV6_TLV_UNREC_OPT_DISCARD_SILENT Macro
C
#define IPV6_TLV_UNREC_OPT_DISCARD_SILENT 0b01
Description
IPv6 action code for the unrecognized option reaction to discard the packet silently
5.8.15.7.2.19 IPV6_TLV_UNREC_OPT_SKIP_OPTION Macro
C
#define IPV6_TLV_UNREC_OPT_SKIP_OPTION 0b00
Description
IPv6 action code for the unrecognized option reaction to skip the option
5.8.15.7.2.20 TCPIP_IPV6_PutArray Macro
C
#define TCPIP_IPV6_PutArray(pkt,data,len) TCPIP_IPV6_ArrayPutHelper(pkt, data,
IPV6_DATA_PIC_RAM, len)
Description
Writes data to an outgoing packet.
Preconditions
The TCPIP_IPV6_TxIsPutReady function must have returned a value greater than or equal to 'len.'
Parameters
Parameters Description
ptrPacket The packet.
dataSource Pointer to the data to copy to the packet.
len Length of the data.
Returns
unsigned short - The number of bytes of data written.
Remarks
None
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5.8.15.7.2.21 IPV6_ACTION Enumeration
C
typedef enum {
IPV6_ACTION_NONE = 0,
IPV6_ACTION_DISCARD_SILENT,
IPV6_ACTION_DISCARD_PP_0,
IPV6_ACTION_DISCARD_PP_2,
IPV6_ACTION_DISCARD_PP_2_NOT_MC,
IPV6_ACTION_BEGIN_EX_HEADER_PROCESSING
} IPV6_ACTION;
Description
IPV6_ACTION Enumeration
Provides a list of possible IPv6 actions.
Remarks
None
5.8.15.7.2.22 IPV6_ADDRESS_POLICY Structure
C
typedef struct {
IPV6_ADDR address;
unsigned char prefixLength;
unsigned char precedence;
unsigned char label;
} IPV6_ADDRESS_POLICY;
Description
IPV6_ADDRESS_POLICY Structure Typedef
Remarks
None
5.8.15.7.2.23 IPV6_ADDRESS_PREFERENCE Enumeration
C
typedef enum {
IPV6_PREFER_PUBLIC_ADDRESSES = 0,
IPV6_PREFER_TEMPORARY_ADDRESSES
} IPV6_ADDRESS_PREFERENCE;
Description
IPV6_ADDRESS_PREFERENCE Enumeration
Provides selection of public versus temporary addresses.
Remarks
None
5.8.15.7.2.24 IPV6_ADDRESS_TYPE Union
C
typedef union {
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unsigned char byte;
struct {
unsigned scope : 4;
unsigned type : 2;
} bits;
} IPV6_ADDRESS_TYPE;
Description
IPV6_ADDRESS_TYPE Union Typedef
Data structure for IPv6 addresses.
Remarks
None
5.8.15.7.2.25 IPV6_DATA_SEGMENT_HEADER Type
C
typedef struct _IPV6_DATA_SEGMENT_HEADER IPV6_DATA_SEGMENT_HEADER;
Description
IPV6_DATA_SEGMENT_HEADER Structure Typedef
Remarks
None
5.8.15.7.2.26 IPV6_EVENT_HANDLER Type
C
typedef void (* IPV6_EVENT_HANDLER)(TCPIP_NET_HANDLE hNet, IPV6_EVENT_TYPE evType, const void*
evParam, const void* usrParam);
Description
Prototype of an IPv6 event handler
Once an IPv6 event occurs the IPv6 service will call the registered handler The handler has to be short and fast. It is meant for
setting an event flag, not for lengthy processing!
evParam is a parameter that's associated to an IPv6 event
• For an address event (IPV6_EVENT_ADDRESS_ADDED, IPV6_EVENT_ADDRESS_REMOVED) it should be typecasted to
(const IPV6_ADDR_STRUCT*)
• For an IPV6_EVENT_ULA_ADDRESS_GENERATED ULA event it should be typecasted to (const IPV6_ADDR*)
• For an IPV6_EVENT_ULA_ADDRESS_FAILED ULA event the evParam is an IPV6_ULA_RESULT error code
The evParam is invalid outside of the IPV6_EVENT_HANDLER context call and should not be stored by the caller. Info that's
needed has to be copied into caller's own context.
usrParam is an user supplied parameter
Remarks
For address related events the passed (const IPV6_ADDR_STRUCT*) parameter is invalid after the notification call.
5.8.15.7.2.27 IPV6_EVENT_TYPE Enumeration
C
typedef enum {
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IPV6_EVENT_ADDRESS_ADDED = 1,
IPV6_EVENT_ADDRESS_REMOVED,
IPV6_EVENT_ULA_ADDRESS_GENERATED,
IPV6_EVENT_ULA_ADDRESS_FAILED
} IPV6_EVENT_TYPE;
Description
IPV6_EVENT_TYPE Enumeration
None
Remarks
None
5.8.15.7.2.28 IPV6_FRAGMENT_HEADER Structure
C
typedef struct {
uint8_t nextHeader;
uint8_t reserved;
union {
struct {
unsigned m : 1;
unsigned reserved2 : 2;
unsigned fragmentOffset : 13;
} bits;
uint16_t w;
} offsetM;
uint32_t identification;
} IPV6_FRAGMENT_HEADER;
Description
IPV6_FRAGMENT_HEADER Structure Typedef
Remarks
None
5.8.15.7.2.29 IPV6_HANDLE Type
C
typedef const void * IPV6_HANDLE;
Description
Pointer to IPv6 object
5.8.15.7.2.30 IPV6_HEADER Structure
C
typedef struct {
unsigned long V_T_F;
unsigned short PayloadLength;
unsigned char NextHeader;
unsigned char HopLimit;
IPV6_ADDR SourceAddress;
IPV6_ADDR DestAddress;
} IPV6_HEADER;
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Description
IPv6 packet header definition
None
Remarks
None
5.8.15.7.2.31 IPV6_MODULE_CONFIG Structure
C
typedef struct {
} IPV6_MODULE_CONFIG;
Description
IPV6_MODULE_CONFIG Structure Typedef
Provides a placeholdef for IPv6 configuration.
Remarks
None
5.8.15.7.2.32 IPV6_NEXT_HEADER_TYPE Enumeration
C
typedef enum {
IPV6_PROT_HOP_BY_HOP_OPTIONS_HEADER = (0u),
IPV6_PROT_ICMP = (1u),
IPV6_PROT_TCP = (6u),
IPV6_PROT_UDP = (17u),
IPV6_PROT_IPV6 = (41u),
IPV6_PROT_ROUTING_HEADER = (43u),
IPV6_PROT_FRAGMENTATION_HEADER = (44u),
IPV6_PROT_ENCAPSULATING_SECURITY_PAYLOAD_HEADER = (50u),
IPV6_PROT_AUTHENTICATION_HEADER = (51u),
IPV6_PROT_ICMPV6 = (58u),
IPV6_PROT_NONE = (59u),
IPV6_PROT_DESTINATION_OPTIONS_HEADER = (60u)
} IPV6_NEXT_HEADER_TYPE;
Description
IPV6_NEXT_HEADER_TYPE Enumeration
Defines a list of next header types
Members
Members Description
IPV6_PROT_HOP_BY_HOP_OPTIONS_HEADER = (0u) IPv6 Hop-by-Hop Opt. Header
IPV6_PROT_IPV6 = (41u) IPv6 Protocol
IPV6_PROT_ROUTING_HEADER = (43u) IPv6 Routing Header
IPV6_PROT_FRAGMENTATION_HEADER = (44u) IPv6 Fragmentation Header
IPV6_PROT_ENCAPSULATING_SECURITY_PAYLOAD_HEADER
= (50u)
Encapsulating Security Payload Header
IPV6_PROT_AUTHENTICATION_HEADER = (51u) Authentication Header
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IPV6_PROT_ICMPV6 = (58u) ICMPv6 Protocol
IPV6_PROT_NONE = (59u) No next header
IPV6_PROT_DESTINATION_OPTIONS_HEADER = (60u) Destination Options Header
Remarks
None
5.8.15.7.2.33 IPV6_PACKET Type
C
typedef struct _IPV6_PACKET IPV6_PACKET;
Description
Packet structure/state tracking for IPv6 packets
5.8.15.7.2.34 IPV6_PACKET_ACK_FNC Type
C
typedef void (* IPV6_PACKET_ACK_FNC)(void*, bool, const void*);
Description
Packet allocation callback function
1st parameter will be an IPV6_PACKET* 2nd parameter is supplied by the caller
Remarks
None
5.8.15.7.2.35 IPV6_RX_FRAGMENT_BUFFER Type
C
typedef struct _IPV6_RX_FRAGMENT_BUFFER IPV6_RX_FRAGMENT_BUFFER;
Description
IPV6_RX_FRAGMENT_BUFFER Structure Typedef
Remarks
None
5.8.15.7.2.36 IPV6_SEGMENT_TYPE Enumeration
C
typedef enum {
TYPE_IPV6_HEADER = 1u,
TYPE_IPV6_EX_HEADER_HOP_BY_HOP_OPTIONS,
TYPE_IPV6_EX_HEADER_DESTINATION_OPTIONS_1,
TYPE_IPV6_EX_HEADER_ROUTING,
TYPE_IPV6_EX_HEADER_FRAGMENT,
TYPE_IPV6_EX_HEADER_AUTHENTICATION_HEADER,
TYPE_IPV6_EX_HEADER_ENCAPSULATING_SECURITY_PAYLOAD,
TYPE_IPV6_EX_HEADER_DESTINATION_OPTIONS_2,
TYPE_IPV6_UPPER_LAYER_HEADER,
TYPE_IPV6_UPPER_LAYER_PAYLOAD,
TYPE_IPV6_BEGINNING_OF_WRITABLE_PART,
TYPE_IPV6_END_OF_LIST
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} IPV6_SEGMENT_TYPE;
Description
IPV6_SEGMENT_TYPE Enumeration
Provides an enumeration of IPv6 segment types.
Remarks
None
5.8.15.7.2.37 IPV6_TLV_OPTION_TYPE Union
C
typedef union {
unsigned char b;
struct {
unsigned option : 6;
unsigned unrecognizedAction : 2;
} bits;
} IPV6_TLV_OPTION_TYPE;
Description
IPV6_TLV_OPTION_TYPE Union Typedef
Data structure for IPv6 TLV options.
Remarks
None
5.8.15.7.2.38 IPV6_ULA_FLAGS Enumeration
C
typedef enum {
IPV6_ULA_FLAG_NTPV4 = 0x01,
IPV6_ULA_FLAG_GENERATE_ONLY = 0x02,
IPV6_ULA_FLAG_SKIP_DAD = 0x04
} IPV6_ULA_FLAGS;
Description
IPV6_ULA_FLAGS Enumeration
Provides a list of possible ULA action flags.
Members
Members Description
IPV6_ULA_FLAG_NTPV4 = 0x01 use an IPv4 NTP server access in Unique Local Address generation default is an
IPv6 server
IPV6_ULA_FLAG_GENERATE_ONLY =
0x02
generate an address only, don't add it to the interface addresses
IPV6_ULA_FLAG_SKIP_DAD = 0x04 when adding the address to the interface, skip the Duplicate Address Detection
Remarks
None
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5.8.15.7.2.39 IPV6_ULA_RESULT Enumeration
C
typedef enum {
IPV6_ULA_RES_OK,
IPV6_ULA_RES_BUSY = -1,
IPV6_ULA_RES_IF_ERR = -2,
IPV6_ULA_RES_NTP_ACCESS_ERR = -3,
IPV6_ULA_RES_NTP_TSTAMP_ERR = -4
} IPV6_ULA_RESULT;
Description
IPV6_ULA_RESULT Enumeration
Provides a list of possible ULA results.
Members
Members Description
IPV6_ULA_RES_OK the address generation was started successfully
IPV6_ULA_RES_BUSY = -1 address generation module is busy
IPV6_ULA_RES_IF_ERR = -2 interface non existent
IPV6_ULA_RES_NTP_ACCESS_ERR = -3 NTP module could not be accessed
IPV6_ULA_RES_NTP_TSTAMP_ERR = -4 wrong NTP time stamp received
Remarks
None
5.8.15.8 Files
Files
Name Description
ipv6.h
Description
5.8.15.8.1 ipv6.h
IPv6 Defs for Microchip TCP/IP Stack
Enumerations
Name Description
IPV6_ACTION Provides a list of possible IPv6 actions.
IPV6_ADDRESS_PREFERENCE Provides selection of public versus temporary addresses.
IPV6_EVENT_TYPE None
IPV6_NEXT_HEADER_TYPE Defines a list of next header types
IPV6_SEGMENT_TYPE Provides an enumeration of IPv6 segment types.
IPV6_ULA_FLAGS Provides a list of possible flags for the Unique Local Address (ULA) generation.
IPV6_ULA_RESULT Provides a list of possible results for the Unique Local Address (ULA)
generation.
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Functions
Name Description
TCPIP_IPV6_AddressUnicastRemove Removed a configured unicast address from an interface.
TCPIP_IPV6_ArrayGet Reads the next byte of data from the specified MAC.
TCPIP_IPV6_ArrayPutHelper Helper function to write data to a packet.
TCPIP_IPV6_DASSourceAddressSelect Determines the appropriate source address for a given destination
address.
TCPIP_IPV6_DestAddressGet Gets the destination address for an IPv6 packet.
TCPIP_IPV6_DestAddressSet Sets the destination address for an IPv6 packet.
TCPIP_IPV6_Flush Flushes an IP TX packet.
TCPIP_IPV6_Get Reads the next byte of data from the specified MAC.
TCPIP_IPV6_HandlerDeregister Deregisters an IPv6 event handler callback function.
TCPIP_IPV6_HandlerRegister Registers an IPv6 event handler callback function.
TCPIP_IPV6_InterfaceIsReady Determines if an interface is ready for IPv6 transactions.
TCPIP_IPV6_MulticastListenerAdd Adds a multicast listener to an interface.
TCPIP_IPV6_MulticastListenerRemove Removes a multicast listener from a given interface.
TCPIP_IPV6_PacketFree Frees a TCP/IP Packet structure from dynamic memory.
TCPIP_IPV6_PayloadSet Allocates a segment on the end of a packet segment chain and
uses it to address pre-buffered data.
TCPIP_IPV6_Put Writes a character of data to a packet.
TCPIP_IPV6_SourceAddressGet Gets the source address for an IPv6 packet.
TCPIP_IPV6_SourceAddressSet Sets the source address for an IPv6 packet.
TCPIP_IPV6_TxIsPutReady Determines whether a TX packet can be written to.
TCPIP_IPV6_TxPacketAllocate Dynamically allocates a packet for transmitting IP protocol data.
TCPIP_IPV6_UnicastAddressAdd Adds a unicast address to a specified interface
TCPIP_IPV6_UniqueLocalUnicastAddressAdd Adds a Unique Local Unicast Address (ULA) to a specified interface
Macros
Name Description
IP_VERSION_4 Using IPv4
IP_VERSION_6 Using IPv6
IPV6_DATA_DYNAMIC_BUFFER Data to transmit is allocated in dynamically allocated RAM
IPV6_DATA_NETWORK_FIFO Data to transmit is stored in the Network Controller's FIFOs
IPV6_DATA_NONE The data segment is unused
IPV6_DATA_PIC_RAM Data to transmit is stored in PIC RAM
IPV6_HEADER_OFFSET_DEST_ADDR Header offset for destination address
IPV6_HEADER_OFFSET_NEXT_HEADER Header offset for next header
IPV6_HEADER_OFFSET_PAYLOAD_LENGTH Header offset for payload length
IPV6_HEADER_OFFSET_SOURCE_ADDR Header offset for source address
IPV6_NO_UPPER_LAYER_CHECKSUM Value flag for no upper layer checksum
IPV6_TLV_HBHO_PAYLOAD_JUMBOGRAM IPv6 Type-length-value type code for the Hop-by-hop
"Jumbogram Payload" option
IPV6_TLV_HBHO_ROUTER_ALERT IPv6 Type-length-value type code for the Hop-by-hop "Router
Alert" option
IPV6_TLV_PAD_1 IPv6 Type-length-value type code for the Pad 1 option
IPV6_TLV_PAD_N IPv6 Type-length-value type code for the Pad N option
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IPV6_TLV_UNREC_OPT_DISCARD_PP IPv6 action code for the unrecognized option reaction to
discard the packet and send an ICMP parameter problem
message
IPV6_TLV_UNREC_OPT_DISCARD_PP_NOT_MC IPv6 action code for the unrecognized option reaction to
discard the packet and send an ICMP parameter problem
message is the destination addr isn't a multicast address
IPV6_TLV_UNREC_OPT_DISCARD_SILENT IPv6 action code for the unrecognized option reaction to
discard the packet silently
IPV6_TLV_UNREC_OPT_SKIP_OPTION IPv6 action code for the unrecognized option reaction to skip
the option
TCPIP_IPV6_PutArray Writes data to a packet
Structures
Name Description
IPV6_ADDRESS_POLICY
IPV6_FRAGMENT_HEADER
IPV6_HEADER None
IPV6_MODULE_CONFIG Provides a placeholdef for IPv6 configuration.
Types
Name Description
IPV6_DATA_SEGMENT_HEADER
IPV6_EVENT_HANDLER Clients can register a handler with the IPv6 service.
IPV6_HANDLE Pointer to IPv6 object
IPV6_PACKET Packet structure/state tracking for IPv6 packets
IPV6_PACKET_ACK_FNC None
IPV6_RX_FRAGMENT_BUFFER
Unions
Name Description
IPV6_ADDRESS_TYPE Data structure for IPv6 addresses.
IPV6_TLV_OPTION_TYPE Data structure for IPv6 TLV options.
5.8.15.8.2 ip_config.h
Refer to the IPv4 Help for this file: ip_config.h
5.8.16 MAC TCP/IP Stack Library
5.8.16.1 Introduction
Media Access Control (MAC) TCP/IP Stack Library
for
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Microchip Microcontrollers
This library provides the API of the MAC TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
In the seven-layer OSI model of computer networking, media access control (MAC) data communication protocol is a sublayer of
the data link layer, which itself is layer 2. The MAC sublayer provides addressing and channel access control mechanisms that
make it possible for several terminals or network nodes to communicate within a multiple access network that incorporates a
shared medium, e.g. Ethernet. The hardware that implements the MAC is referred to as a medium access controller.
The MAC sublayer acts as an interface between the logical link control (LLC) sublayer and the network's physical layer. The
MAC layer emulates a full-duplex logical communication channel in a multi-point network. This channel may provide unicast,
multicast or broadcast communication service.
5.8.16.2 Release Notes
MPLAB Harmony Version: v0.70b MAC TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.16.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.16.4 Using the Library
This topic describes the basic architecture of the MAC TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: tcpip_mac.h
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The interface to the MAC TCP/IP Stack library is defined in the "tcpip_mac.h" header file. This file is included by the "tcpip.h" file.
Any C language source (.c) file that uses the MAC TCP/IP Stack library should include "tcpip.h".
Library File:
The MAC TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.16.4.1 Abstraction Model
This library provides the API of the MAC TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
MAC Software Abstraction Block Diagram
Note: This diagram was not available at time of release and will be added in a future version of MPLAB Harmony.
5.8.16.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the MAC module.
Library Interface Section Description
Functions Routines for configuring the MAC TCP/IP Stack
Data Types and Constants This section provides various definitions describing this API
5.8.16.5 Configuring the Library
Macros
Name Description
EMAC_RX_BUFF_SIZE size of a RX buffer. should be multiple of 16 this is the size of all receive buffers
processed by the ETHC The size should be enough to accomodate any network
received packet If the packets are larger, they will have to take multiple RX buffers
and the packet manipulation is less efficient #define EMAC_RX_BUFF_SIZE 512
EMAC_RX_DESCRIPTORS number of the RX descriptors and RX buffers to be created
EMAC_RX_FRAGMENTS MAC maximum number of supported fragments Based on the values of
EMAC_RX_MAX_FRAME and EMAC_RX_BUFF_SIZE an incoming frame may
span multiple RX buffers (fragments). Note that excessive fragmentation leads to
performance degradation. The default and recommended value should be 1.
#define EMAC_RX_FRAGMENTS 1 Alternatively you can use the calculation of
the number of fragments based on the selected RX sizes:
EMAC_RX_MAX_FRAME Maximum MAC supported RX frame size. Any incoming ETH frame that's longer
than this size will be discarded. The default value is 1536 (allows for VLAN tagged
frames, although the VLAN tagged frames are discarded) Normally you shouldn't
need to touch this value unless you know exactly the maximum size of the frames
you want to process or you need to control packets fragmentation (together with
the EMAC_RX_BUFF_SIZE.
EMAC_TX_DESCRIPTORS number of the TX descriptors to be created
ETH_CFG_10 use/advertise 10 Mbps capability
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ETH_CFG_100 use/advertise 100 Mbps capability
ETH_CFG_AUTO use auto negotiation
ETH_CFG_AUTO_MDIX use/advertise auto MDIX capability
ETH_CFG_FDUPLEX use/advertise full duplex capability
ETH_CFG_HDUPLEX use/advertise half duplex capability
ETH_CFG_LINK set to 1 if you need to config the link to specific following parameters otherwise the
default connection will be attempted depending on the selected PHY
ETH_CFG_LINK_INIT_DELAY some PHYs need an initialization delay for insuring that the PHY is ready to
transmit data. milliseconds
ETH_CFG_SWAP_MDIX use swapped MDIX. else normal MDIX
Description
The configuration of the MAC TCP/IP Stack is based on the file tcpip_config.h
This header file contains the configuration selection for the MAC TCP/IP Stack. Based on the selections made, the MAC TCP/IP
Stack will support or not support selected features. These configuration settings will apply to all instances of the MAC TCP/IP
Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.16.5.1 EMAC_RX_BUFF_SIZE Macro
C
#define EMAC_RX_BUFF_SIZE 1536
Description
size of a RX buffer. should be multiple of 16 this is the size of all receive buffers processed by the ETHC The size should be
enough to accomodate any network received packet If the packets are larger, they will have to take multiple RX buffers and the
packet manipulation is less efficient #define EMAC_RX_BUFF_SIZE 512
5.8.16.5.2 EMAC_RX_DESCRIPTORS Macro
C
#define EMAC_RX_DESCRIPTORS 6
Description
number of the RX descriptors and RX buffers to be created
5.8.16.5.3 EMAC_RX_FRAGMENTS Macro
C
#define EMAC_RX_FRAGMENTS ((EMAC_RX_MAX_FRAME + (EMAC_RX_BUFF_SIZE -1 )) / (EMAC_RX_BUFF_SIZE))
Description
MAC maximum number of supported fragments Based on the values of EMAC_RX_MAX_FRAME and EMAC_RX_BUFF_SIZE
an incoming frame may span multiple RX buffers (fragments). Note that excessive fragmentation leads to performance
degradation. The default and recommended value should be 1. #define EMAC_RX_FRAGMENTS 1 Alternatively you can use
the calculation of the number of fragments based on the selected RX sizes:
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5.8.16.5.4 EMAC_RX_MAX_FRAME Macro
C
#define EMAC_RX_MAX_FRAME 1536
Description
Maximum MAC supported RX frame size. Any incoming ETH frame that's longer than this size will be discarded. The default
value is 1536 (allows for VLAN tagged frames, although the VLAN tagged frames are discarded) Normally you shouldn't need to
touch this value unless you know exactly the maximum size of the frames you want to process or you need to control packets
fragmentation (together with the EMAC_RX_BUFF_SIZE.
Remarks
Always multiple of 16!
5.8.16.5.5 EMAC_TX_DESCRIPTORS Macro
C
#define EMAC_TX_DESCRIPTORS 8
Description
number of the TX descriptors to be created
5.8.16.5.6 ETH_CFG_10 Macro
C
#define ETH_CFG_10 1
Description
use/advertise 10 Mbps capability
5.8.16.5.7 ETH_CFG_100 Macro
C
#define ETH_CFG_100 1
Description
use/advertise 100 Mbps capability
5.8.16.5.8 ETH_CFG_AUTO Macro
C
#define ETH_CFG_AUTO 1
Description
use auto negotiation
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5.8.16.5.9 ETH_CFG_AUTO_MDIX Macro
C
#define ETH_CFG_AUTO_MDIX 1
Description
use/advertise auto MDIX capability
5.8.16.5.10 ETH_CFG_FDUPLEX Macro
C
#define ETH_CFG_FDUPLEX 1
Description
use/advertise full duplex capability
5.8.16.5.11 ETH_CFG_HDUPLEX Macro
C
#define ETH_CFG_HDUPLEX 1
Description
use/advertise half duplex capability
5.8.16.5.12 ETH_CFG_LINK Macro
C
#define ETH_CFG_LINK 0
Description
set to 1 if you need to config the link to specific following parameters otherwise the default connection will be attempted
depending on the selected PHY
5.8.16.5.13 ETH_CFG_LINK_INIT_DELAY Macro
C
#define ETH_CFG_LINK_INIT_DELAY 500
Description
some PHYs need an initialization delay for insuring that the PHY is ready to transmit data. milliseconds
5.8.16.5.14 ETH_CFG_SWAP_MDIX Macro
C
#define ETH_CFG_SWAP_MDIX 1
Description
use swapped MDIX. else normal MDIX
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5.8.16.6 Building the Library
This section list the files that are available in the \src of the MAC driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.8.16.7 Library Interface
Data Types and Constants
Name Description
5.8.16.7.1 Functions
5.8.16.7.1.1 TCPIP_MAC_Close Function
C
TCPIP_MAC_RES TCPIP_MAC_Close(
TCPIP_MAC_HANDLE hMac
);
Description
closes a MAC client
5.8.16.7.1.2 TCPIP_MAC_Deinitialize Function
C
TCPIP_MAC_RES TCPIP_MAC_Deinitialize(
const TCPIP_MAC_MODULE_CTRL * const
);
Description
MAC de-initialization function Returns a result to indicate that everything has been cleaned up.
5.8.16.7.1.3 TCPIP_MAC_EventAcknowledge Function
C
bool TCPIP_MAC_EventAcknowledge(
TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_EVENT macEvents
);
Description
acknowledges reported event(s) returns false if no event to be acknowledged true otherwise
5.8.16.7.1.4 TCPIP_MAC_EventMaskSet Function
C
bool TCPIP_MAC_EventMaskSet(
TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_EVENT macEvents,
bool enable
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);
Description
enables/disables the events to be reported multiple events could be or-ed returns false if some error occurred
5.8.16.7.1.5 TCPIP_MAC_EventPendingGet Function
C
TCPIP_MAC_EVENT TCPIP_MAC_EventPendingGet(
TCPIP_MAC_HANDLE hMac
);
Description
returns current pending events
5.8.16.7.1.6 TCPIP_MAC_Initialize Function
C
TCPIP_MAC_RES TCPIP_MAC_Initialize(
TCPIP_MAC_MODULE_CTRL* const stackData,
const void* const moduleData
);
Description
TCPIP_MAC_Initialize
5.8.16.7.1.7 TCPIP_MAC_LinkCheck Function
C
bool TCPIP_MAC_LinkCheck(
TCPIP_MAC_HANDLE hMac
);
Description
Link Interface functions
5.8.16.7.1.8 TCPIP_MAC_Open Function
C
TCPIP_MAC_HANDLE TCPIP_MAC_Open(
unsigned int macId
);
Description
function to open a MAC and get a client handle
5.8.16.7.1.9 TCPIP_MAC_PacketRx Function
C
TCPIP_MAC_PACKET* TCPIP_MAC_PacketRx(
TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_RES* pRes,
const TCPIP_MAC_PACKET_RX_STAT** ppPktStat
);
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Description
TCPIP_MAC_PacketRx
This is the MAC receive function.
Once a pending packet is available in the MAC driver internal RX queues this function will dequeue the packet and hand it over
to the MAC driver's client - i.e. the stack - for further processing.
The flags for a RX packet have to be updated by the MAC driver:
• TCPIP_MAC_PKT_FLAG_RX has to be set If the MAC supports it, it should set:
• TCPIP_MAC_PKT_FLAG_UNICAST has to be set if that packet is a unicast packet
• TCPIP_MAC_PKT_FLAG_BCAST has to be set if that packet is a broadcast packet
• TCPIP_MAC_PKT_FLAG_MCAST has to be set if that packet is a multicast packet
• TCPIP_MAC_PKT_FLAG_QUEUED has to be set
• TCPIP_MAC_PKT_FLAG_SPLIT has to be set if the packet has multiple data segments
Additional information about the packet is available by providing the pRes and ppPktStat fields.
Parameters
Parameters Description
hMac handle identifying the MAC driver client
pRes optional pointer to an address that will receive an additional result associated with
the operation. Can be 0 if not needed.
ppPktStat optional pointer to an address that will receive the received packet status. Note
that this pointer cannot be used once the packet acknowledgement function was
called. Can be 0 if not needed.
Returns
a valid pointer to an available RX packet 0 if no packet pending/available
Remarks
The MAC driver should dequeue and return to the caller just one single packet, and not multiple chained packets!
Once the higher level layers in the stack are done with processing the RX packet, they have to call the corresponding packet
acknowledgement function that tells the owner of that packet that it can resume control of that packet.
Once the stack modules are done processing the RX packets and the acknowledge function is called it is up to the driver design
to reuse the RX packets, or simply return them to the pool they were allocated from (assuming that some sort of allocation is
implemented). This document makes no requirement about how the MAC RX packets are obtained, using dynamic or static
allocation techniques. This is up to the design of the MAC.
The MAC driver can use the TCPIP_MAC_Process() for obtaining new RX packets if needed.
Not all the MACs have hardware support for the received packet status. If the MAC driver cannot supply the
TCPIP_MAC_PACKET_RX_STAT info, it should set the ppPktStat to 0.
5.8.16.7.1.10 TCPIP_MAC_PacketTx Function
C
TCPIP_MAC_RES TCPIP_MAC_PacketTx(
TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_PACKET * ptrPacket
);
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Description
TCPIP_MAC_PacketTx
This is the MAC transmit function. The MAC driver has to suport internal queueing! A packet is to be rejected only if it's not
properly formatted. Otherwise it has to be scheduled for transmission in an internal queue!
Once the packet is scheduled for transmission the MAC driver has to set the TCPIP_MAC_PKT_FLAG_QUEUED flag so that
the stack is aware that this packet is under processing cnd cannot be modified!
Once the packet is transmitted, the TCPIP_MAC_PKT_FLAG_QUEUED has to be cleared, the proper packet acknowledgement
result (ackRes) has to be set and the packet acknowledgement function (ackFunc) has to be called. It is implementation
dependant if all these steps are implemented as part of the ackFunc itself or as discrete steps.
Parameters
Parameters Description
hMac handle identifying the MAC driver client
ptrPacket pointer to a TCPIP_MAC_PACKET that's completely formatted and ready to be
transmitted over the network
Remarks
See notes for the segLoadOffset member.
On 32 bit machines the 1st segment payload of a packet is allocated so that it is always 32 bit aligned and its size is 32 bits
multiple. The segLoadOffset adds to the payload address and insures that the network layer data is 32 bit aligned.
• PIC32 MAC driver specific : the driver checks that the segLoadOffset >= 2.
The packet is not required to contain the Frame Check Sequence (FCS/CRC32) field. The MAC driver/controller will insert that
field itself, if it's required.
The MAC driver is required to support the transmission of multiple chained packets.
5.8.16.7.1.11 TCPIP_MAC_Process Function
C
TCPIP_MAC_RES TCPIP_MAC_Process(
TCPIP_MAC_HANDLE hMac
);
Description
TCPIP_MAC_Process
This is a function that allows for internal processing by the MAC driver. It is meant for processing that cannot be done from within
ISR.
Some of the processing that this is intended for:
• the MAC driver can process its pending TX queues (although it should do that preferrably from within the TX ISR)
• RX buffers replenishing. If the number of packets in the RX queue falls below a specified limit, the MAC driver can use this
function to allocate some extra RX packets. Similarly, if there are too many allocated RX packets, the MAC driver can free
some of them.
Normally this function will be called in response to an TX and/or RX event signalled by the driver. This is specified by the MAC
driver at initialization time using TCPIP_MAC_MODULE_CTRL.
An alternative approach is that the MAC driver uses a system service to create a timer signal that will call the
TCPIP_MAC_Process on a periodic basis.
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Parameters
Parameters Description
hMac handle identifying the MAC driver client
Returns
TCPIP_MAC_RES_OK if all processing went on OK a TCPIP_MAC_RES error code if processing failed for some reason
Remarks
None.
5.8.16.7.1.12 TCPIP_MAC_Reinitialize Function
C
TCPIP_MAC_RES TCPIP_MAC_Reinitialize(
const TCPIP_MAC_MODULE_CTRL* const stackData,
const void* const moduleData
);
Description
MAC re-initialization function Allows re-initialization of the MAC with different power modes, etc. probably the same signature as
TCPIP_MAC_Initialize Optional function
5.8.16.7.1.13 TCPIP_MAC_RxFilterHashTableEntrySet Function
C
TCPIP_MAC_RES TCPIP_MAC_RxFilterHashTableEntrySet(
TCPIP_MAC_HANDLE hMac,
TCPIP_MAC_ADDR* DestMACAddr
);
Description
set the hash table filter
5.8.16.7.2 Data Types and Constants
5.8.16.7.2.1 TCPIP_MAC_ACTION Enumeration
C
typedef enum {
TCPIP_MAC_ACTION_INIT,
TCPIP_MAC_ACTION_REINIT,
TCPIP_MAC_ACTION_DEINIT,
TCPIP_MAC_ACTION_IF_UP,
TCPIP_MAC_ACTION_IF_DOWN
} TCPIP_MAC_ACTION;
Description
• Interface functions
***********************************
network interface action for initialization/de-initialization
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Members
Members Description
TCPIP_MAC_ACTION_INIT stack is initialized
TCPIP_MAC_ACTION_REINIT stack is re-initialized
TCPIP_MAC_ACTION_DEINIT stack is de-initialized
TCPIP_MAC_ACTION_IF_UP interface is brought up
TCPIP_MAC_ACTION_IF_DOWN interface is brought down
5.8.16.7.2.2 TCPIP_MAC_ADDR Structure
C
typedef struct {
uint8_t v[6];
} TCPIP_MAC_ADDR;
Description
Structure to contain a MAC address
5.8.16.7.2.3 TCPIP_MAC_DATA_SEGMENT Type
C
typedef struct _tag_MAC_DATA_SEGMENT TCPIP_MAC_DATA_SEGMENT;
Description
TCPIP MAC Data Segment
Structure of a segment buffer transferred with the MAC. A MAC TX or RX packet can consist of multiple data segments. On TX
the MAC has to be able to transmit packets that span multiple data segments. On RX of a network frame the MAC may have to
use multiple segments to construct a packet. (For performance reasons, a contiguous MAC packet, with just one segment, if
possible, is preferred).
Remarks
See notes for the segLoadOffset member.
On 32 bit machines the segment payload is allocated so that it is always 32 bit aligned and its size is 32 bits multiple. The
segLoadOffset adds to the payload address and insures that the network layer data is 32 bit aligned.
5.8.16.7.2.4 TCPIP_MAC_ETHERNET_HEADER Structure
C
typedef struct {
TCPIP_MAC_ADDR DestMACAddr;
TCPIP_MAC_ADDR SourceMACAddr;
uint16_t Type;
} TCPIP_MAC_ETHERNET_HEADER;
Description
A generic structure representing the Ethernet header starting all Ethernet frames
5.8.16.7.2.5 TCPIP_MAC_EVENT Enumeration
C
typedef enum {
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TCPIP_MAC_EV_NONE = 0x0000,
TCPIP_MAC_EV_RX_PKTPEND = 0x0001,
TCPIP_MAC_EV_RX_OVFLOW = 0x0002,
TCPIP_MAC_EV_RX_BUFNA = 0x0004,
TCPIP_MAC_EV_RX_ACT = 0x0008,
TCPIP_MAC_EV_RX_DONE = 0x0010,
TCPIP_MAC_EV_RX_FWMARK = 0x0020,
TCPIP_MAC_EV_RX_EWMARK = 0x0040,
TCPIP_MAC_EV_RX_BUSERR = 0x0080,
TCPIP_MAC_EV_TX_DONE = 0x0100,
TCPIP_MAC_EV_TX_ABORT = 0x0200,
TCPIP_MAC_EV_TX_BUSERR = 0x0400,
TCPIP_MAC_EV_CONN_ESTABLISHED = 0x0800,
TCPIP_MAC_EV_CONN_LOST = 0x1000,
TCPIP_MAC_EV_RX_ALL =
(TCPIP_MAC_EV_RX_PKTPEND|TCPIP_MAC_EV_RX_OVFLOW|TCPIP_MAC_EV_RX_BUFNA|TCPIP_MAC_EV_RX_ACT|
TCPIP_MAC_EV_RX_DONE|TCPIP_MAC_EV_RX_FWMARK|TCPIP_MAC_EV_RX_EWMARK|TCPIP_MAC_EV_RX_BUSERR),
TCPIP_MAC_EV_TX_ALL = (TCPIP_MAC_EV_TX_DONE|TCPIP_MAC_EV_TX_ABORT|TCPIP_MAC_EV_TX_BUSERR),
TCPIP_MAC_EV_RXTX_ERRORS =
(TCPIP_MAC_EV_RX_OVFLOW|TCPIP_MAC_EV_RX_BUFNA|TCPIP_MAC_EV_RX_BUSERR|TCPIP_MAC_EV_TX_ABORT|TCPI
P_MAC_EV_TX_BUSERR),
TCPIP_MAC_EV_CONN_ALL = (TCPIP_MAC_EV_CONN_ESTABLISHED|TCPIP_MAC_EV_CONN_LOST)
} TCPIP_MAC_EVENT;
Description
TCPIP MAC Events Codes
This enumeration defines all the possible events that can be reported by the MAC to the stack.
Depending on the type of the hardware Ethernet/WiFi interface, etc., not all events are possible.
Members
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TCPIP_MAC_EV_RX_PKTPEND = 0x0001 R
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5.8.16.7.2.6 TCPIP_MAC_EventF Type
C
typedef void (* TCPIP_MAC_EventF)(TCPIP_MAC_EVENT event, const void* eventParam);
Description
event notification Function: typedef void (*TCPIP_MAC_EventF)(TCPIP_MAC_EVENT event, const void* eventParam);
This function describes the MAC event notification handler. This is a handler specified by the user of the MAC (the TCP/IP
stack). The stack can use the handler to be notified of MAC events. Whenever a notification occurs the passed events have to
be eventually processed:
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• Stack should process the TCPIP_EV_RX_PKTPEND/TCPIP_EV_RX_DONE, TCPIP_EV_TX_DONE events
• Process the specific (error) condition
• Acknowledge the events by calling TCPIP_MAC_EventAcknowledge() so that they can be re-enabled.
Preconditions
None
Parameters
Parameters Description
event event that's reported (multiple events can be OR-ed)
eventParam user parameter that's used in the notification handler
Returns
None
Remarks
The notification handler will be called from the ISR which detects the corresponding event. The event notification handler has to
be kept as short as possible and non-blocking. Mainly useful for RTOS integration where this handler will wake-up a thread that
waits for a MAC event to occur.
The event notification system also enables the user of the TCPIP stack to call into the stack for processing only when there are
relevant events rather than being forced to periodically call from within a loop at unknown moments.
Without a notification handler the stack user can still call TCPIP_MAC_EventPendingGet() to see if processing by the stack
needed.
This is a default way of adding MAC interrupt processing to the TCP/IP stack.
5.8.16.7.2.7 TCPIP_MAC_HANDLE Type
C
typedef const void* TCPIP_MAC_HANDLE;
Description
handle to a MAC
5.8.16.7.2.8 TCPIP_MAC_HEAP_CallocF Type
C
typedef void* (* TCPIP_MAC_HEAP_CallocF)(TCPIP_MAC_HEAP_HANDLE heapH, size_t nElems, size_t
elemSize);
Description
calloc function
5.8.16.7.2.9 TCPIP_MAC_HEAP_FreeF Type
C
typedef int (* TCPIP_MAC_HEAP_FreeF)(TCPIP_MAC_HEAP_HANDLE heapH, const void* pBuff);
Description
free function
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5.8.16.7.2.10 TCPIP_MAC_HEAP_HANDLE Type
C
typedef const void* TCPIP_MAC_HEAP_HANDLE;
Description
handle to a heap
5.8.16.7.2.11 TCPIP_MAC_HEAP_MallocF Type
C
typedef void* (* TCPIP_MAC_HEAP_MallocF)(TCPIP_MAC_HEAP_HANDLE heapH, size_t nBytes);
Description
malloc function
5.8.16.7.2.12 TCPIP_MAC_MODULE_CTRL Structure
C
typedef struct {
int nIfs;
TCPIP_MAC_HEAP_MallocF mallocF;
TCPIP_MAC_HEAP_CallocF callocF;
TCPIP_MAC_HEAP_FreeF freeF;
TCPIP_MAC_HEAP_HANDLE memH;
TCPIP_MAC_PKT_AllocF pktAllocF;
TCPIP_MAC_PKT_FreeF pktFreeF;
TCPIP_MAC_PKT_AckF pktAckF;
TCPIP_MAC_EventF eventF;
const void* eventParam;
unsigned int moduleId;
int netIx;
TCPIP_MAC_ACTION macAction;
TCPIP_MAC_POWER_MODE powerMode;
TCPIP_MAC_ADDR ifPhyAddress;
TCPIP_MAC_PROCESS_FLAGS processFlags;
} TCPIP_MAC_MODULE_CTRL;
Description
data that's passed as reference to MAC driver module init/deinit.
Members
Members Description
int nIfs; permanent data; this data is maintained by the stack for one full session i.e.
accross Initialize() -> DeInitialize() calls number of the interfaces supported in this
seession
TCPIP_MAC_HEAP_MallocF mallocF; transient data; contains info for a specific module call
allocation functions/parameters
TCPIP_MAC_HEAP_HANDLE memH; handle to be used in the stack allocation service calls
TCPIP_MAC_PKT_AllocF pktAllocF; packet allocation functions
TCPIP_MAC_EventF eventF; function to be used by the MAC for event reporting
const void* eventParam; parameter to be used when the event function is called
unsigned int moduleId; module identifier; allows multiple channels/ports, etc. MAC support
int netIx; index of the current interface
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TCPIP_MAC_ACTION macAction; current action for the MAC/stack
TCPIP_MAC_POWER_MODE powerMode; the power mode for this interface to go to valid only if stackAction == init/re-init;
ignored for de-init
TCPIP_MAC_ADDR ifPhyAddress; physical address of the interface
5.8.16.7.2.13 TCPIP_MAC_PACKET Type
C
typedef struct _tag_TCPIP_MAC_PACKET TCPIP_MAC_PACKET;
Description
forward declaration
5.8.16.7.2.14 TCPIP_MAC_PACKET_ACK_FUNC Type
C
typedef void (* TCPIP_MAC_PACKET_ACK_FUNC)(TCPIP_MAC_PACKET* pkt, const void* param);
Description
This is type TCPIP_MAC_PACKET_ACK_FUNC.
5.8.16.7.2.15 TCPIP_MAC_PACKET_FLAGS Enumeration
C
typedef enum {
TCPIP_MAC_PKT_FLAG_STATIC = 0x0001,
TCPIP_MAC_PKT_FLAG_TX = 0x0002,
TCPIP_MAC_PKT_FLAG_SPLIT = 0x0004,
TCPIP_MAC_PKT_FLAG_QUEUED = 0x0008,
TCPIP_MAC_PKT_FLAG_UNICAST = 0x0010,
TCPIP_MAC_PKT_FLAG_BCAST = 0x0020,
TCPIP_MAC_PKT_FLAG_MCAST = 0x0040,
TCPIP_MAC_PKT_FLAG_CAST_MASK = 0x0070,
TCPIP_MAC_PKT_FLAG_CAST_DISABLED = 0x0000,
TCPIP_MAC_PKT_FLAG_USER = 0x0100
} TCPIP_MAC_PACKET_FLAGS;
Description
16 bits only packet flags!
Members
Members Description
TCPIP_MAC_PKT_FLAG_STATIC = 0x0001 packet/segment can not be dynamically deallocated set when the packet is
allocated
TCPIP_MAC_PKT_FLAG_TX = 0x0002 if set, it's an TX packet/segment else is an RX packet
TCPIP_MAC_PKT_FLAG_SPLIT = 0x0004 packet data spans multiple segments - ZC functionality if not set the packet has
only one data segment set by the MAC driver when a RX packet spans multiple
data segments
TCPIP_MAC_PKT_FLAG_QUEUED =
0x0008
packet data is queued somewhere, cannot be freed flag is set by the packet
source when the packet is passed for further processing to a destination cleared
by the packet destination when the packet processing was completed.
TCPIP_MAC_PKT_FLAG_UNICAST =
0x0010
MAC updated: it's an unicast packet
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TCPIP_MAC_PKT_FLAG_BCAST = 0x0020 MAC updated: it's an broadcast packet
TCPIP_MAC_PKT_FLAG_MCAST = 0x0040 MAC updated: it's an multicast packet
TCPIP_MAC_PKT_FLAG_CAST_MASK =
0x0070
packet cast mask bits
TCPIP_MAC_PKT_FLAG_CAST_DISABLED
= 0x0000
if all zeroes MAC packet MCAST/BCAST fields are not updated by the MAC RX
process
TCPIP_MAC_PKT_FLAG_USER = 0x0100 available user flags start here
5.8.16.7.2.16 TCPIP_MAC_PACKET_RX_STAT Structure
C
typedef struct {
unsigned chksumOk : 1;
unsigned pktChecksum : 16;
unsigned runtPkt : 1;
unsigned notMeUcast : 1;
unsigned htMatch : 1;
unsigned magicMatch : 1;
unsigned pmMatch : 1;
unsigned uMatch : 1;
unsigned bMatch : 1;
unsigned mMatch : 1;
unsigned rxBytes : 16;
unsigned crcError : 1;
unsigned lenError : 1;
unsigned lenRange : 1;
unsigned rxOk : 1;
unsigned mcast : 1;
unsigned bcast : 1;
unsigned rxCtrl : 1;
unsigned rxVLAN : 1;
} TCPIP_MAC_PACKET_RX_STAT;
Description
Received Packet Status
This structure contains the status of a received packet.
Members
Members Description
unsigned chksumOk : 1; correct checksum filled in
unsigned pktChecksum : 16; Packet payload checksum
unsigned runtPkt : 1; Runt packet received
unsigned notMeUcast : 1; Unicast, not me packet,
unsigned htMatch : 1; Hash table match
unsigned magicMatch : 1; Magic packet match
unsigned pmMatch : 1; Pattern match match
unsigned uMatch : 1; Unicast match
unsigned bMatch : 1; Broadcast match
unsigned mMatch : 1; Multicast match
unsigned rxBytes : 16; Received bytes
unsigned crcError : 1; CRC error in packet
unsigned lenError : 1; Receive length check error
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unsigned lenRange : 1; Receive length out of range
unsigned rxOk : 1; Receive OK
unsigned mcast : 1; Multicast packet
unsigned bcast : 1; Broadcast packet
unsigned rxCtrl : 1; Control frame received
unsigned rxVLAN : 1; Received VLAN tagged frame
Remarks
Not all the MACs have hardware support for the received packet status.
5.8.16.7.2.17 TCPIP_MAC_PKT_ACK_RES Enumeration
C
typedef enum {
TCPIP_MAC_PKT_ACK_NONE = 0,
TCPIP_MAC_PKT_ACK_TX_OK = 1,
TCPIP_MAC_PKT_ACK_RX_OK = 2,
TCPIP_MAC_PKT_ACK_LINK_DOWN = -1,
TCPIP_MAC_PKT_ACK_NET_DOWN = -2,
TCPIP_MAC_PKT_ACK_BUFFER_ERR = -3,
TCPIP_MAC_PKT_ACK_ARP_TMO = -4,
TCPIP_MAC_PKT_ACK_ARP_NET_ERR = -5,
TCPIP_MAC_PKT_ACK_CHKSUM_ERR = -10,
TCPIP_MAC_PKT_ACK_SOURCE_ERR = -11,
TCPIP_MAC_PKT_ACK_TYPE_ERR = -12,
TCPIP_MAC_PKT_ACK_STRUCT_ERR = -13,
TCPIP_MAC_PKT_ACK_PROTO_DEST_ERR = -14,
TCPIP_MAC_PKT_ACK_FRAGMENT_ERR = -15,
TCPIP_MAC_PKT_ACK_PROTO_DEST_CLOSE = -16,
TCPIP_MAC_PKT_ACK_ALLOC_ERR = -17
} TCPIP_MAC_PKT_ACK_RES;
Description
list of return codes for a packet acknowledge function 16 bits only acknowledge results!
Members
Members Description
TCPIP_MAC_PKT_ACK_NONE = 0 packet result unknown, unspecified TX success code - positive
TCPIP_MAC_PKT_ACK_TX_OK = 1 packet was transmitted successfully RX success code - positive
TCPIP_MAC_PKT_ACK_RX_OK = 2 packet was received/processed successfully TX error codes - negative
TCPIP_MAC_PKT_ACK_LINK_DOWN = -1 packet was dropped because the link was down
TCPIP_MAC_PKT_ACK_NET_DOWN = -2 packet was dropped because the network is down
TCPIP_MAC_PKT_ACK_BUFFER_ERR = -3 packet was dropped because the buffer type is not supported
TCPIP_MAC_PKT_ACK_ARP_TMO = -4 packet was dropped because of an ARP timeout
TCPIP_MAC_PKT_ACK_ARP_NET_ERR = -5 packet associated interface is down or non existent
RX error codes - negative
TCPIP_MAC_PKT_ACK_CHKSUM_ERR = -10 packet was dropped because the checksum was incorrect
TCPIP_MAC_PKT_ACK_SOURCE_ERR = -11 packet was dropped because of wrong interface source address
TCPIP_MAC_PKT_ACK_TYPE_ERR = -12 packet was dropped because the type was unknown
TCPIP_MAC_PKT_ACK_STRUCT_ERR = -13 internal packet structure error
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TCPIP_MAC_PKT_ACK_PROTO_DEST_ERR =
-14
the packet protocol couldn't find a destination for it
TCPIP_MAC_PKT_ACK_FRAGMENT_ERR = -15 the packet too fragmented
TCPIP_MAC_PKT_ACK_PROTO_DEST_CLOSE
= -16
the packet destination is closing
TCPIP_MAC_PKT_ACK_ALLOC_ERR = -17 memory allocation error
5.8.16.7.2.18 TCPIP_MAC_PKT_AckF Type
C
typedef void (* TCPIP_MAC_PKT_AckF)(TCPIP_MAC_PACKET* pPkt, TCPIP_MAC_PKT_ACK_RES ackRes);
Description
acknowledges a packet clears the TCPIP_MAC_PKT_FLAG_QUEUED flag a packet should always have an acknowledgment
function packet's ackRes is updated only if the parameter ackRes != TCPIP_MAC_PKT_ACK_NONE.
5.8.16.7.2.19 TCPIP_MAC_PKT_AllocF Type
C
typedef TCPIP_MAC_PACKET* (* TCPIP_MAC_PKT_AllocF)(uint16_t pktLen, uint16_t segLoadLen,
TCPIP_MAC_PACKET_FLAGS flags);
Description
allocates a TCPIP_MAC_PACKET packet (TCPIP_MAC_ETHERNET_HEADER always added); pktLen - the size of the packet
(it will be 32 bits rounded up) segLoadLen - the payload size for the segment associated to this packet; Payload is always 32 bit
aligned if 0 no segment is created/attached to the packet
5.8.16.7.2.20 TCPIP_MAC_PKT_FreeF Type
C
typedef void (* TCPIP_MAC_PKT_FreeF)(TCPIP_MAC_PACKET* pPkt);
Description
frees a previously allocated packet that neither the packet nor segments marked with
TCPIP_MAC_PKT_FLAG_STATIC/TCPIP_MAC_SEG_FLAG_STATIC are not freed Also note that this function does not free
explicitely the external segment payload. A payload that was created contiguously when the segment was created will be
automatically freed by this function.
5.8.16.7.2.21 TCPIP_MAC_POWER_MODE Enumeration
C
typedef enum {
TCPIP_MAC_POWER_NONE,
TCPIP_MAC_POWER_FULL,
TCPIP_MAC_POWER_LOW,
TCPIP_MAC_POWER_DOWN
} TCPIP_MAC_POWER_MODE;
Description
supported MAC power mode state
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Members
Members Description
TCPIP_MAC_POWER_NONE unknown power mode;
TCPIP_MAC_POWER_FULL up and running; valid for init/re-init
TCPIP_MAC_POWER_LOW low power mode; valid for init/re-init
TCPIP_MAC_POWER_DOWN interface is down;
5.8.16.7.2.22 TCPIP_MAC_PROCESS_FLAGS Enumeration
C
typedef enum {
TCPIP_MAC_PROCESS_FLAG_NONE = 0x0000,
TCPIP_MAC_PROCESS_FLAG_RX = 0x0001,
TCPIP_MAC_PROCESS_FLAG_TX = 0x0002,
TCPIP_MAC_PROCESS_FLAG_ANY = 0x0100
} TCPIP_MAC_PROCESS_FLAGS;
Description
specific MAC process flags multiple flags can be orred
Members
Members Description
TCPIP_MAC_PROCESS_FLAG_NONE =
0x0000
the stack never has to call the TCPIP_MAC_Process function
TCPIP_MAC_PROCESS_FLAG_RX =
0x0001
the stack has to call the TCPIP_MAC_Process after an RX signal
TCPIP_MAC_PROCESS_FLAG_TX =
0x0002
the stack has to call the TCPIP_MAC_Process after an TX signal
TCPIP_MAC_PROCESS_FLAG_ANY =
0x0100
the stack has to call the TCPIP_MAC_Process after any type of signal
5.8.16.7.2.23 TCPIP_MAC_RES Enumeration
C
typedef enum {
TCPIP_MAC_RES_OK = 0,
TCPIP_MAC_RES_PENDING = 1,
TCPIP_MAC_RES_TYPE_ERR = -1,
TCPIP_MAC_RES_IS_BUSY = -2,
TCPIP_MAC_RES_INIT_FAIL = -3,
TCPIP_MAC_RES_PHY_INIT_FAIL = -4,
TCPIP_MAC_RES_EVENT_INIT_FAIL = -5,
TCPIP_MAC_RES_OP_ERR = -6,
TCPIP_MAC_RES_ALLOC_ERR = -7,
TCPIP_MAC_RES_INSTANCE_ERR = -8,
TCPIP_MAC_RES_FRAGMENT_ERR = -9,
TCPIP_MAC_RES_PACKET_ERR = -10,
TCPIP_MAC_RES_QUEUE_TX_FULL = -11
} TCPIP_MAC_RES;
Description
list of return codes from MAC functions
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Members
Members Description
TCPIP_MAC_RES_OK = 0 operation successful benign operation results - positive codes
TCPIP_MAC_RES_PENDING = 1 operation is pending upon some hardware resource call again to completion error
codes - negative
TCPIP_MAC_RES_TYPE_ERR = -1 unsupported type
TCPIP_MAC_RES_IS_BUSY = -2 device is in use
TCPIP_MAC_RES_INIT_FAIL = -3 generic initialization failure
TCPIP_MAC_RES_PHY_INIT_FAIL = -4 PHY initialization failure
TCPIP_MAC_RES_EVENT_INIT_FAIL = -5 Event system initialization failure
TCPIP_MAC_RES_OP_ERR = -6 unsupported operation
TCPIP_MAC_RES_ALLOC_ERR = -7 memory allocation error
TCPIP_MAC_RES_INSTANCE_ERR = -8 already instantiated, initialized error
TCPIP_MAC_RES_FRAGMENT_ERR = -9 too fragmented, RX buffer too small
TCPIP_MAC_RES_PACKET_ERR = -10 unsupported/corrupted packet error
TCPIP_MAC_RES_QUEUE_TX_FULL =
-11
TX queue exceeded the limit
5.8.16.7.2.24 TCPIP_MAC_SEGMENT_FLAGS Enumeration
C
typedef enum {
TCPIP_MAC_SEG_FLAG_STATIC = 0x0001,
TCPIP_MAC_SEG_FLAG_TX = 0x0002,
TCPIP_MAC_SEG_FLAG_USER = 0x0100
} TCPIP_MAC_SEGMENT_FLAGS;
Description
16 bits only segment flags!
Members
Members Description
TCPIP_MAC_SEG_FLAG_STATIC =
0x0001
segment can not be dynamically deallocated set when the segment is allocated
TCPIP_MAC_SEG_FLAG_TX = 0x0002 if set, it's an TX segment else is an RX packet available user segment flags start
here
5.8.16.7.2.25 TCPIP_MODULE_MAC_97J60_CONFIG Structure
C
typedef struct {
} TCPIP_MODULE_MAC_97J60_CONFIG;
Description
This is type TCPIP_MODULE_MAC_97J60_CONFIG.
5.8.16.7.2.26 TCPIP_MODULE_MAC_ENCJ60_CONFIG Structure
C
typedef struct {
} TCPIP_MODULE_MAC_ENCJ60_CONFIG;
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Description
MAC initialization data Each supported MAC has its own specific init/configuration data
5.8.16.7.2.27 TCPIP_MODULE_MAC_ENCJ600_CONFIG Structure
C
typedef struct {
} TCPIP_MODULE_MAC_ENCJ600_CONFIG;
Description
This is type TCPIP_MODULE_MAC_ENCJ600_CONFIG.
5.8.16.7.2.28 TCPIP_MODULE_MAC_MRF24W_CONFIG Structure
C
typedef struct {
} TCPIP_MODULE_MAC_MRF24W_CONFIG;
Description
This is type TCPIP_MODULE_MAC_MRF24W_CONFIG.
5.8.16.7.2.29 TCPIP_MODULE_MAC_PIC32INT_CONFIG Structure
C
typedef struct {
int nTxDescriptors;
int rxBuffSize;
int nRxDescriptors;
} TCPIP_MODULE_MAC_PIC32INT_CONFIG;
Description
This is type TCPIP_MODULE_MAC_PIC32INT_CONFIG.
Members
Members Description
int nTxDescriptors; number of TX descriptors
int rxBuffSize; size of the corresponding RX buffer
int nRxDescriptors; number of RX descriptors
5.8.16.8 Files
Files
Name Description
tcpip_mac.h
tcpip_mac_config.h configuration file
Description
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5.8.16.8.1 tcpip_mac.h
MAC Module Defs for Microchip Stack
Enumerations
Name Description
5.8.16.8.2 tcpip_mac_config.h
MAC Configuration file
This file contains the MAC module configuration options
Macros
Name Description
EMAC_RX_BUFF_SIZE size of a RX buffer. should be multiple of 16 this is the size of all receive buffers
processed by the ETHC The size should be enough to accomodate any network
received packet If the packets are larger, they will have to take multiple RX buffers
and the packet manipulation is less efficient #define EMAC_RX_BUFF_SIZE 512
EMAC_RX_DESCRIPTORS number of the RX descriptors and RX buffers to be created
EMAC_RX_FRAGMENTS MAC maximum number of supported fragments Based on the values of
EMAC_RX_MAX_FRAME and EMAC_RX_BUFF_SIZE an incoming frame may
span multiple RX buffers (fragments). Note that excessive fragmentation leads to
performance degradation. The default and recommended value should be 1.
#define EMAC_RX_FRAGMENTS 1 Alternatively you can use the calculation of
the number of fragments based on the selected RX sizes:
EMAC_RX_MAX_FRAME Maximum MAC supported RX frame size. Any incoming ETH frame that's longer
than this size will be discarded. The default value is 1536 (allows for VLAN tagged
frames, although the VLAN tagged frames are discarded) Normally you shouldn't
need to touch this value unless you know exactly the maximum size of the frames
you want to process or you need to control packets fragmentation (together with
the EMAC_RX_BUFF_SIZE.
EMAC_TX_DESCRIPTORS number of the TX descriptors to be created
ETH_CFG_10 use/advertise 10 Mbps capability
ETH_CFG_100 use/advertise 100 Mbps capability
ETH_CFG_AUTO use auto negotiation
ETH_CFG_AUTO_MDIX use/advertise auto MDIX capability
ETH_CFG_FDUPLEX use/advertise full duplex capability
ETH_CFG_HDUPLEX use/advertise half duplex capability
ETH_CFG_LINK set to 1 if you need to config the link to specific following parameters otherwise the
default connection will be attempted depending on the selected PHY
ETH_CFG_LINK_INIT_DELAY some PHYs need an initialization delay for insuring that the PHY is ready to
transmit data. milliseconds
ETH_CFG_SWAP_MDIX use swapped MDIX. else normal MDIX
5.8.17 Manager TCP/IP Stack Library
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5.8.17.1 Introduction
Manager TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the Manager TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
Handles internal RX packet pre-processing prior to dispatching to upper application layers.
5.8.17.2 Release Notes
MPLAB Harmony Version: v0.70b Manager TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.17.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.17.4 Using the Library
This topic describes the basic architecture of the Manager TCP/IP Stack Library and provides information and examples on how
to use it.
Interface Header File: tcpip_manager.h
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The interface to the Manager TCPIP Stack library is defined in the "tcpip_manager.h" header file. This file is included by the
"tcpip.h" file. Any C language source (.c) file that uses the Manager TCP/IP Stack library should include "tcpip.h".
Library File:
The Manager TCPIP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.17.4.1 Abstraction Model
This library provides the API of the Manager TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
Manager Software Abstraction Block Diagram
Handles internal RX packet pre-processing prior to dispatching to upper application layers.
5.8.17.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the MAC module.
Library Interface Section Description
Task and Initialize Functions Routines to Initialize and De-Initialize this Module
Network Up/Down/Linked Functions Routines to Set and Get the Network's Up/Down Status
Network Status and Control Functions Routines to Set and Get the Various Network Controls
Network Address Status and Control Functions Routines to Set and Get the Network's Address Status
Network Structure Storage Functions Network Information Routines.
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Data Types and Constants This section provides various definitions describing This API
5.8.17.5 Configuring the Library
The configuration of the Manager TCP/IP Stack is based on the file sys_config.h
This header file contains the configuration selection for the Manager TCP/IP Stack. Based on the selections made, the Manager
TCP/IP Stack will support or not support selected features. These configuration settings will apply to all instances of the Manager
TCP/IP Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.17.6 Building the Library
This section list the files that are available in the \src of the Manager driver. It lists which files need to be included in the build
based on either a hardware feature present on the board or configuration option selected by the system.
5.8.17.7 Library Interface
Data Types and Constants
Name Description
TCPIP_LOCAL_MASK_TYPE types of masks used in the detection of a local/nonlocal network
TCPIP_NET_HANDLE a network interface handle
Network Address Status and Control Functions
Name Description
TCPIP_STACK_ModuleGetConfig This function returns the current configuration data of the stack
module specified by the corresponding module ID.
TCPIP_STACK_NetAddress
TCPIP_STACK_NetAddressBcast
TCPIP_STACK_NetAddressDnsPrimary
TCPIP_STACK_NetAddressDnsPrimarySet
TCPIP_STACK_NetAddressDnsSecond
TCPIP_STACK_NetAddressDnsSecondSet
TCPIP_STACK_NetAddressGateway
TCPIP_STACK_NetAddressGatewaySet
TCPIP_STACK_NetAddressMac
TCPIP_STACK_NetAddressMacSet
TCPIP_STACK_NetAddressSet
TCPIP_STACK_NetIPv6AddressGet This function allows the listing of the IPv6 addresses associated with
an interface.
Network Status and Control Functions
Name Description
TCPIP_STACK_IndexToNet
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TCPIP_STACK_NetBIOSName
TCPIP_STACK_NetBiosNameSet
TCPIP_STACK_NetDefaultGet
TCPIP_STACK_NetDefaultSet
TCPIP_STACK_NetHandleGet
TCPIP_STACK_NetIndexGet
TCPIP_STACK_NetMask
TCPIP_STACK_NetNameGet
TCPIP_STACK_NumberOfNetworksGet
Network Structure Storage Functions
Name Description
TCPIP_STACK_NetConfigGet This function dumps the current configuration data of the network interface
specified by the corresponding network handle into the supplied buffer.
5.8.17.7.1 Task and Initialize Functions
5.8.17.7.1.1 TCPIP_STACK_Deinitialize Function
C
void TCPIP_STACK_Deinitialize();
Description
This function performs the de-initialization of the TCPIP stack
Preconditions
None
Returns
None
Side Effects
None
Remarks
None
5.8.17.7.1.2 TCPIP_STACK_Initialize Function
C
bool TCPIP_STACK_Initialize(
const TCPIP_NETWORK_CONFIG* pNetConf,
int nNets,
const TCPIP_STACK_MODULE_CONFIG* pModConfig,
int nModules
);
Description
The function initializes the stack. If an error occurs, the SYS_ERROR() is called and the function de-initialize itself and will return
false.
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Preconditions
None
Parameters
Parameters Description
pNetConf pointer to an array of TCPIP_NETWORK_CONFIG to support
nNets number of network configurations in the array
pModConfig pointer to an array of TCPIP_STACK_MODULE_CONFIG
nModules number of modules to initialize
Returns
true if Stack and its componets are initialized false otherwise
Side Effects
None
Remarks
This function must be called before any of the stack or its component routines are used.
New TCPIP_NETWORK_CONFIG types should be added/removed at run time for implementations that support dynamic
network interface creation.
5.8.17.7.1.3 TCPIP_STACK_SetLocalMasks Function
C
bool TCPIP_STACK_SetLocalMasks(
TCPIP_NET_HANDLE netH,
uint32_t andMask,
uint32_t orMask
);
Description
This function sets the masks used in the stack decision of a destination address being a local or nonlocal address. These masks
will be used when the corresponding mask type is set to TCPIP_LOCAL_MASK_SET.
Preconditions
None
Parameters
Parameters Description
netH handle of the interface to use
andMask AND mask to use for local network detection, big endian (BE) format
orType OR mask to use for local network detection , BE format
Returns
if interface exists then this function will set the masks and return true. otherwise it will return false
Remarks
None
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); TCPIP_STACK_SetLocalMasks(netH, 0x0101a0c0,
0x0);
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5.8.17.7.1.4 TCPIP_STACK_SetLocalMasksType Function
C
bool TCPIP_STACK_SetLocalMasksType(
TCPIP_NET_HANDLE netH,
TCPIP_LOCAL_MASK_TYPE andType,
TCPIP_LOCAL_MASK_TYPE orType
);
Description
This function sets the types of masks used in the stack decision of a destination address being a local or nonlocal address. For
example, when a TCP connection is made, the advertised MSS usually has different values for local versus nonlocal networks.
In order to decide if a destination IP address (destAdd) is local to a network interface (having the netAdd address) the following
calculation is performed: if( ((destAdd & andMask) | orMask) == ((netAdd & andMask) | orMask)) then the destination address is
considered to be a local address. else the destination address is nonlocal.
This function sets the types of masks used for the AND and OR operations, as follows:
• TCPIP_LOCAL_MASK_ZERO: use the all 0's mask (0x00000000)
• TCPIP_LOCAL_MASK_ONE: use the all 1's mask (0xffffffff)
• TCPIP_LOCAL_MASK_NET: use the current network mask
• TCPIP_LOCAL_MASK_SET: use a mask that's set by the application There are operations to set a specific AND and OR
masks
Using different valuse for the AND and OR masks an application can select various destination networks to be considered as
local/nonlocal:
• only the own network
• any network
• no network
• specific (range of) networks
• etc.
Preconditions
None
Parameters
Parameters Description
netH handle of the interface to use
andType AND type of mask to use for local network detection
orType OR type of mask to use for local network detection
Returns
if interface exists then this function will set the mask types and return true. otherwise it will return false
Remarks
The default value for both AND and OR masks is set to TCPIP_LOCAL_MASK_ZERO so that any destination network is
considered to be local!
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); TCPIP_STACK_SetLocalMasksType(netH,
TCPIP_LOCAL_MASK_NET, TCPIP_LOCAL_MASK_ZERO);
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5.8.17.7.1.5 TCPIP_STACK_Task Function
C
void TCPIP_STACK_Task();
Preconditions
TCPIP_STACK_Initialize() is already called.
Returns
Stack Finite-state Machine (FSM) is executed.
Side Effects
None
Remarks
This FSM checks for new incoming packets, and routes it to appropriate stack components. It also performs timed operations.
This function must be called periodically to ensure timely responses.
5.8.17.7.2 Network Status and Control Functions
5.8.17.7.2.1 TCPIP_STACK_IndexToNet Function
C
TCPIP_NET_HANDLE TCPIP_STACK_IndexToNet(
int netIx
);
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
netH Interface handle.
Returns
Resolves an index to an network handle.
Side Effects
None
Remarks
None
5.8.17.7.2.2 TCPIP_STACK_NetBIOSName Function
C
const char* TCPIP_STACK_NetBIOSName(
TCPIP_NET_HANDLE netH
);
Preconditions
None
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Parameters
Parameters Description
netH Interface handle to get name of.
Returns
if interface is enabled then it returns the NetBIOS name of that interface else return 0
Remarks
None
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); const char* biosName =
TCPIP_STACK_NetBIOSName(netH);
5.8.17.7.2.3 TCPIP_STACK_NetBiosNameSet Function
C
bool TCPIP_STACK_NetBiosNameSet(
TCPIP_NET_HANDLE netH,
const char* biosName
);
Preconditions
None
Parameters
Parameters Description
netH Interface handle to set name of.
Returns
if interface exists then it sets the NetBIOS name of that interface and returns true else return false
Remarks
See Important Note above!
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); TCPIP_STACK_NetBiosNameSet(netH,
myBiosName);
5.8.17.7.2.4 TCPIP_STACK_NetDefaultGet Function
C
TCPIP_NET_HANDLE TCPIP_STACK_NetDefaultGet();
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Returns
The default net interface for multi-homed hosts
Side Effects
None
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Remarks
Function to dynamically change the default interface will be added.
5.8.17.7.2.5 TCPIP_STACK_NetDefaultSet Function
C
bool TCPIP_STACK_NetDefaultSet(
TCPIP_NET_HANDLE netH
);
Preconditions
None
Parameters
Parameters Description
netH Interface handle.
Returns
true if success false if failed (the old interface does not change)
Side Effects
None
Remarks
sets the default interface
5.8.17.7.2.6 TCPIP_STACK_NetHandleGet Function
C
TCPIP_NET_HANDLE TCPIP_STACK_NetHandleGet(
const char* interface
);
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
interface The names specified in tcpip_config.h::TCPIP_NETWORK_CONFIG.
Returns
Resolves an interface name to a handle.
Side Effects
None
Remarks
None
Example
TCPIP_NET_HANDLE hNet = TCPIP_STACK_NetHandleGet("PIC32INT");
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5.8.17.7.2.7 TCPIP_STACK_NetIndexGet Function
C
int TCPIP_STACK_NetIndexGet(
TCPIP_NET_HANDLE hNet
);
Preconditions
None
Parameters
Parameters Description
hNet Interface handle.
Returns
Index of this entry in the stack network handles
Side Effects
None
Remarks
None
5.8.17.7.2.8 TCPIP_STACK_NetMask Function
C
uint32_t TCPIP_STACK_NetMask(
TCPIP_NET_HANDLE netH
);
Preconditions
None
Parameters
Parameters Description
netH Interface handle to get mask of.
Returns
if interface is enabled then it returns the IP address mask of that interface else return 0
Remarks
None
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); uint32_t subMask = TCPIP_STACK_NetMask(netH);
5.8.17.7.2.9 TCPIP_STACK_NetNameGet Function
C
const char* TCPIP_STACK_NetNameGet(
TCPIP_NET_HANDLE netH
);
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Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
netH Interface handle to get the name of.
Returns
it returns the name associated to that interface handle returns 0 if no such name
Side Effects
None
Remarks
None
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_IndexToNet(0); const char* netName = TCPIP_STACK_NetNameGet(netH);
5.8.17.7.2.10 TCPIP_STACK_NumberOfNetworksGet Function
C
int TCPIP_STACK_NumberOfNetworksGet();
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Returns
Number of network interfaces
Side Effects
None
Remarks
None
5.8.17.7.3 Network Up/Down/Linked Functions
5.8.17.7.3.1 TCPIP_STACK_NetDown Function
C
bool TCPIP_STACK_NetDown(
TCPIP_NET_HANDLE netH
);
Description
This function performs the de-initialization of a net interface
Preconditions
None
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Parameters
Parameters Description
netH Interface handle.
Returns
true if success false if no such network
Side Effects
None
Remarks
None
5.8.17.7.3.2 TCPIP_STACK_NetIsLinked Function
C
bool TCPIP_STACK_NetIsLinked(
TCPIP_NET_HANDLE hNet
);
Preconditions
None
Parameters
Parameters Description
hNet Interface handle.
Returns
true if interface exists and the corresponding MAC is linked false otherwise
Side Effects
None
Remarks
None
5.8.17.7.3.3 TCPIP_STACK_NetIsUp Function
C
bool TCPIP_STACK_NetIsUp(
TCPIP_NET_HANDLE hNet
);
Preconditions
None
Parameters
Parameters Description
hNet Interface handle.
Returns
true if interface exists and is enabled false otherwise
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Side Effects
None
Remarks
None
5.8.17.7.3.4 TCPIP_STACK_NetUp Function
C
bool TCPIP_STACK_NetUp(
TCPIP_NET_HANDLE netH,
const TCPIP_NETWORK_CONFIG* pUsrConfig
);
Description
This function brings the desired interface up.
Preconditions
None
Parameters
Parameters Description
netH Interface handle.
pUsrConfig pointer to a TCPIP_NETWORK_CONFIG for the interface initialization
Returns
true if success false if no such network or an error occurred
Side Effects
None
Remarks
None
5.8.17.7.4 Network Address Status and Control Functions
5.8.17.7.4.1 TCPIP_STACK_ModuleGetConfig Function
C
size_t TCPIP_STACK_ModuleGetConfig(
TCPIP_STACK_MODULE modId,
void* configBuff,
size_t buffSize,
size_t* pNeededSize
);
Description
This function returns the current configuration data of the stack module specified by the corresponding module ID.
Preconditions
None
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Parameters
Parameters Description
modId the ID that identifies the requested module
configBuff pointer to a buffer that will receive the configuration data If this pointer is 0, just the
pNeededSize will be updated
buffSize size of the provided buffer
pNeededSize pointer to an address to store the number of bytes needed to store this module
configuration data Can be NULL if not needed.
Returns
number of bytes copied to the user buffer: -1 if the module ID is invalid 0 if the configBuff is NULL or buffSize is less than
required >0 if the call succeeded and the configuration was copied
Remarks
None
Example
uint8_t configBuffer[200]; size_t configSize; size_t copiedSize; copiedSize =
TCPIP_STACK_ModuleGetConfig(TCPIP_MODULE_MAC_MRF24W, configBuffer, sizeof(configBuffer), &configSize);
5.8.17.7.4.2 TCPIP_STACK_NetAddress Function
C
uint32_t TCPIP_STACK_NetAddress(
TCPIP_NET_HANDLE netH
);
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
netH Interface handle to get address of.
Returns
if interface is enabled then it returns the IP address of that interface else return 0
Side Effects
None
Remarks
None
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); uint32_t ipAdd = TCPIP_STACK_NetAddress(netH);
5.8.17.7.4.3 TCPIP_STACK_NetAddressBcast Function
C
uint32_t TCPIP_STACK_NetAddressBcast(
TCPIP_NET_HANDLE netH
);
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Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
netH Interface handle to get address of.
Returns
if interface is enabled then it returns the broadcast IP address mask of that interface else return 0
Side Effects
None
Remarks
None
5.8.17.7.4.4 TCPIP_STACK_NetAddressDnsPrimary Function
C
uint32_t TCPIP_STACK_NetAddressDnsPrimary(
TCPIP_NET_HANDLE netH
);
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
netH Interface handle to get the DNS address of.
Returns
the primary DNS address if succes false if not such interface or interface is down
Side Effects
None
Remarks
None
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); myIPAddress =
TCPIP_STACK_NetAddressDnsPrimary(netH);
5.8.17.7.4.5 TCPIP_STACK_NetAddressDnsPrimarySet Function
C
bool TCPIP_STACK_NetAddressDnsPrimarySet(
TCPIP_NET_HANDLE netH,
IPV4_ADDR* ipAddress
);
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
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Parameters
Parameters Description
netH Interface handle to set the DNS address of.
ipAddress IP address to set
Returns
true if succes false if not such interface
Side Effects
None
Remarks
See Important Note above!
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); TCPIP_STACK_NetAddressDnsPrimarySet(netH,
&myIPAddress);
5.8.17.7.4.6 TCPIP_STACK_NetAddressDnsSecond Function
C
uint32_t TCPIP_STACK_NetAddressDnsSecond(
TCPIP_NET_HANDLE netH
);
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
netH Interface handle to get the DNS address of.
Returns
the secondary DNS address if succes false if not such interface or interface is down
Side Effects
None
Remarks
None
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); myIPAddress =
TCPIP_STACK_NetAddressDnsSecond(netH);
5.8.17.7.4.7 TCPIP_STACK_NetAddressDnsSecondSet Function
C
bool TCPIP_STACK_NetAddressDnsSecondSet(
TCPIP_NET_HANDLE netH,
IPV4_ADDR* ipAddress
);
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Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
netH Interface handle to set the secondary DNS address of.
ipAddress IP address to set
Returns
true if succes false if not such interface
Side Effects
None
Remarks
See Important Note above!
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); TCPIP_STACK_NetAddressDnsSecondSet(netH,
&myIPAddress);
5.8.17.7.4.8 TCPIP_STACK_NetAddressGateway Function
C
uint32_t TCPIP_STACK_NetAddressGateway(
TCPIP_NET_HANDLE netH
);
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
netH Interface handle to get address of.
Returns
if interface is enabled then it returns the gateway address of that interface else return 0
Side Effects
None
Remarks
None
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); uint32_t ipAdd =
TCPIP_STACK_NetAddressGateway(netH);
5.8.17.7.4.9 TCPIP_STACK_NetAddressGatewaySet Function
C
bool TCPIP_STACK_NetAddressGatewaySet(
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TCPIP_NET_HANDLE netH,
IPV4_ADDR* ipAddress
);
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
netH Interface handle to set the gateway address of.
ipAddress IP address to set
Returns
true if succes false if not such interface
Side Effects
None
Remarks
See Important Note above!
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); TCPIP_STACK_NetAddressGatewaySet(netH,
&myIPAddress);
5.8.17.7.4.10 TCPIP_STACK_NetAddressMac Function
C
const uint8_t* TCPIP_STACK_NetAddressMac(
TCPIP_NET_HANDLE netH
);
Preconditions
None
Parameters
Parameters Description
netH Interface handle to get the address of.
Returns
if interface is enabled then it returns a constant pointer to the MAC address of that interface else return 0
Remarks
None
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); const TCPIP_MAC_ADDR* pAdd =
TCPIP_STACK_NetAddressMac(netH);
5.8.17.7.4.11 TCPIP_STACK_NetAddressMacSet Function
C
bool TCPIP_STACK_NetAddressMacSet(
TCPIP_NET_HANDLE netH,
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const TCPIP_MAC_ADDR* pAddr
);
Preconditions
None
Parameters
Parameters Description
netH Interface handle to set the address of.
Returns
if interface is enabled then it returns a constant pointer to the MAC address of that interface else return 0
Remarks
See Important Note above!
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); TCPIP_STACK_NetAddressMacSet(netH,
&myMacAddress);
5.8.17.7.4.12 TCPIP_STACK_NetAddressSet Function
C
bool TCPIP_STACK_NetAddressSet(
TCPIP_NET_HANDLE netH,
IPV4_ADDR* ipAddress,
IPV4_ADDR* mask,
bool setDefault
);
Preconditions
TCPIP stack should have been initialized by TCPIP_STACK_Initialize()
Parameters
Parameters Description
netH Interface handle to set address of.
ipAddress IP address to set (could be NULL to set only the mask)
mask corresponding network mask to set (could be NULL to set only the IP address)
setDefault if true, the interface default address/mask is also set
Returns
true if succes false if not such interface
Side Effects
None
Remarks
See Important Note above!
This function sets the associated network IP address and/or mask. If you're changing the network then it's preferred that you set
both these values simultaneously to avoid having the stack running with a mismatch between its IP address and mask.
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); TCPIP_STACK_NetAddressSet(netH,
&myIPAddress);
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5.8.17.7.4.13 TCPIP_STACK_NetIPv6AddressGet Function
C
IPV6_ADDR_HANDLE TCPIP_STACK_NetIPv6AddressGet(
TCPIP_NET_HANDLE netH,
IPV6_ADDR_TYPE addType,
IPV6_ADDR_STRUCT* pAddStruct,
IPV6_ADDR_HANDLE addHandle
);
Description
This function allows the listing of the IPv6 addresses associated with an interface.
Preconditions
None
Parameters
Parameters Description
netH handle of the interface to retrieve the addresses for
addType type of address to request: IPV6_ADDR_TYPE_UNICAST and
IPV6_ADDR_TYPE_MULTICAST supported for now
pAddStruct structure provided by the user that will be filled with corresponding
IPV6_ADDR_STRUCT data
addHandle an address handle that allows iteration across multiple IPv6 addresses.
On the first call has to be 0; it will begin the listing of the IPv6 addresses
On subsequent calls has to be a handle previously returned by a call to this function
Returns
- a non NULL IPV6_ADDR_HANDLE if an valid IPv6 address was found and the pAddStruct structure was filled with data
• 0 if no other IPv6 exists or if the supplied IPV6_ADDR_HANDLE is invalid
Remarks
None
Example
IPV6_ADDR_STRUCT currAddr; IPV6_ADDR_HANDLE currHandle; TCPIP_NET_HANDLE hNet =
TCPIP_STACK_NetHandleGet("PIC32INT"); char ipv6AddBuff[44];
currHandle = 0; do { currHandle = TCPIP_STACK_NetIPv6AddressGet(netH, IPV6_ADDR_TYPE_UNICAST, &currAddr,
currHandle); if(currHandle) { // have a valid address; display it TCPIP_HELPER_IPv6AddressToString(&currAddr.address,
ipv6AddBuff, sizeof(ipv6AddBuff)); } }while(currHandle != 0);
5.8.17.7.5 Network Structure Storage Functions
5.8.17.7.5.1 TCPIP_STACK_NetConfigGet Function
C
size_t TCPIP_STACK_NetConfigGet(
TCPIP_NET_HANDLE netH,
void* configStoreBuff,
size_t configStoreSize,
size_t* pNeededSize
);
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Description
This function dumps the current configuration data of the network interface specified by the corresponding network handle into
the supplied buffer.
Preconditions
None
Parameters
Parameters Description
netH the handle that identifies the requested interface
configStoreBuff pointer to a buffer that will receive the current configuration data. All the data that's
needed to restore a TCPIP_NETWORK_CONFIG structure is stored in this buffer.
Can be NULL if only the storage size is needed.
configStoreSize size of the supplied buffer
pNeededSize pointer to store the size needed for storage; Can be NULL if not needed
Returns
-1 if the interface is invalid or the stack is not initialized 0 if no data is copied (no supplied buffer of buffer too small) >0 for
success, indicating the amount of data copied.
Remarks
The function is a helper for retrieving the network configuration data. Its companion function, TCPIP_STACK_NetConfigSet,
restores the TCPIP_NETWORK_CONFIG from the dump buffer.
Currently the data is saved in plain binary format into the supplied buffer. However the application must not make use of this
assumption as it may change in the future releases (some compression scheme may be implemented).
Example
uint8_t currConfig[100]; size_t neededSize, result; TCPIP_NET_HANDLE hNet = TCPIP_STACK_NetHandleGet("PIC32INT");
result = TCPIP_STACK_NetConfigGet(hNet, currConfig, sizeof(currConfig), &neededSize); if(result > 0) { // store the currConfig
to some external storage }
5.8.17.7.5.2 TCPIP_STACK_NetConfigSet Function
C
TCPIP_NETWORK_CONFIG* TCPIP_STACK_NetConfigSet(
void* configStoreBuff,
void* netConfigBuff,
size_t buffSize,
size_t* pNeededSize
);
Description
This function restores data from a previously dump buffer and updates the supplied interface configuration. All the data is
recovered and constructed into the netConfigBuff (supposing this buffer is large enough). If this operation succeeded, the
netConfigBuff can be safely cast to a (TCPIP_NETWORK_CONFIG*).
The structure of the netConfigBuff is as follows:
• a TCPIP_NETWORK_CONFIG sturcture is created at the very beginning of the buffer
• all the needed fields that are part of the TCPIP_NETWORK_CONFIG will be placed in the buffer itself.
Preconditions
None
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Parameters
Parameters Description
configStoreBuff pointer to a buffer that received configuration data from a
TCPIP_STACK_NetConfigGet call.
netConfigBuff pointer to a buffer that will receive the TCPIP_NETWORK_CONFIG data
buffSize size of the supplied netConfigBuff buffer
pNeededSize pointer to store the size needed for storage; Can be NULL if not needed
Returns
a valid TCPIP_NETWORK_CONFIG pointer (netConfigBuff) if the netConfigBuff is successfully updated 0 - if the netConfigBuff
is not supplied or not big enough
If supplied, the pNeededSize will be updated with the actual size that's needed for the netConfigBuff
Remarks
The function is a helper for being able to restore the configuration data. Its companion function, TCPIP_STACK_NetConfigGet,
saves the TCPIP_NETWORK_CONFIG to a dump buffer.
Example
uint8_t currConfig[100]; uint8_t restoreBuff[100]; size_t neededSize, result; TCPIP_NET_HANDLE hNet =
TCPIP_STACK_NetHandleGet("PIC32INT"); result = TCPIP_STACK_NetConfigGet(hNet, currConfig, sizeof(currConfig),
&neededSize); if(result > 0) { // store the currConfig buffer to some external storage (neededSize bytes needed)
// later on restore the configuration TCPIP_NETWORK_CONFIG* netConfig; // extract the network configuration from the
previously saved buffer netConfig = TCPIP_STACK_NetConfigSet(currConfig, restoreBuff, sizeof(restoreBuff), neededSize);
if(netConfig) { // use this netConfig to initialize a network interface TCPIP_STACK_NetUp(hNet, netConfig); } }
5.8.17.7.5.3 TCPIP_STACK_NetMACId Function
C
TCPIP_STACK_MODULE TCPIP_STACK_NetMACId(
TCPIP_NET_HANDLE netH
);
Description
This function returns the module ID of the MAC that's attached to the specified network interface.
Preconditions
None
Parameters
Parameters Description
netH handle of the interface to use
Returns
a TCPIP_STACK_MODULE ID that belongs to the MAC of that network interface.
Remarks
None
Example
TCPIP_NET_HANDLE netH = TCPIP_STACK_NetHandleGet("PIC32INT"); TCPIP_STACK_MODULE modId =
TCPIP_STACK_NetMACId(netH); if(modId == TCPIP_MODULE_MAC_PIC32INT) { // an internal PIC32 MAC attached to this
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interface }
5.8.17.7.6 Data Types and Constants
5.8.17.7.6.1 TCPIP_LOCAL_MASK_TYPE Enumeration
C
typedef enum {
TCPIP_LOCAL_MASK_ZERO,
TCPIP_LOCAL_MASK_ONE,
TCPIP_LOCAL_MASK_NET,
TCPIP_LOCAL_MASK_SET
} TCPIP_LOCAL_MASK_TYPE;
Description
types of masks used in the detection of a local/nonlocal network
Members
Members Description
TCPIP_LOCAL_MASK_ZERO use an all zero network mask
TCPIP_LOCAL_MASK_ONE use an all ones network mask
TCPIP_LOCAL_MASK_NET use the current network mask
TCPIP_LOCAL_MASK_SET use the set value for the network mask there are operations available that set the
local/nonlocal detection network mask
5.8.17.7.6.2 TCPIP_NET_HANDLE Type
C
typedef const void* TCPIP_NET_HANDLE;
Description
a network interface handle
5.8.17.8 Files
Files
Name Description
tcpip_manager.h
Description
5.8.17.8.1 tcpip_manager.h
Microchip TCP/IP Stack Definitions
Enumerations
Name Description
TCPIP_LOCAL_MASK_TYPE types of masks used in the detection of a local/nonlocal network
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Functions
Name Description
TCPIP_STACK_Deinitialize This function performs the de-initialization of the TCPIP stack
TCPIP_STACK_IndexToNet
TCPIP_STACK_Initialize The function initializes the stack. If an error occurs, the
SYS_ERROR() is called and the function de-initialize itself and will
return false.
TCPIP_STACK_ModuleGetConfig This function returns the current configuration data of the stack
module specified by the corresponding module ID.
TCPIP_STACK_NetAddress
TCPIP_STACK_NetAddressBcast
TCPIP_STACK_NetAddressDnsPrimary
TCPIP_STACK_NetAddressDnsPrimarySet
TCPIP_STACK_NetAddressDnsSecond
TCPIP_STACK_NetAddressDnsSecondSet
TCPIP_STACK_NetAddressGateway
TCPIP_STACK_NetAddressGatewaySet
TCPIP_STACK_NetAddressMac
TCPIP_STACK_NetAddressMacSet
TCPIP_STACK_NetAddressSet
TCPIP_STACK_NetBIOSName
TCPIP_STACK_NetBiosNameSet
TCPIP_STACK_NetConfigGet This function dumps the current configuration data of the network
interface specified by the corresponding network handle into the
supplied buffer.
5.8.18 NBNS TCP/IP Stack Library
5.8.18.1 Introduction
NetBIOS (NBNS) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the NBNS TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The NetBIOS Name Service protocol associates host names with IP addresses, similarly to DNS, but on the same IP subnet.
Practically, this allows the assignment of human-name hostnames to access boards on the same subnet. For example. in the
"TCP/IP Demo App" demonstration project, the demo board is programmed with the human name 'mchpboard' so it can be
accessed directly instead of with its IP address.
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5.8.18.2 Release Notes
MPLAB Harmony Version: v0.70b NBNS TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.18.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.18.4 Using the Library
This topic describes the basic architecture of the NBNS TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: nbns.h
The interface to the NBNS TCPIP Stack library is defined in the "nbns.h" header file. This file is included by the "tcpip.h" file. Any
C language source (.c) file that uses the NBNS TCP/IP Stack library should include "tcpip.h".
Library File:
The NBNS TCPIP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.18.4.1 Abstraction Model
This library provides the API of the NBNS TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
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Description
NBNS Software Abstraction Block Diagram
Note: This image was not available at time of release and will be added in a future release of MPLAB Harmony.
5.8.18.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the NBNS module.
Library Interface Section Description
Data Types and Constants This section provides various definitions describing This API
5.8.18.5 Configuring the Library
Macros
Name Description
NBNS_PORT NetBIOS Name Service port
Description
The configuration of the NBNS TCP/IP Stack is based on the file tcpip_config.h
This header file contains the configuration selection for the NBNS TCP/IP Stack. Based on the selections made, the NBNS
TCP/IP Stack will support or not support selected features. These configuration settings will apply to all instances of the NBNS
TCP/IP Stack.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.18.5.1 NBNS_PORT Macro
C
#define NBNS_PORT (137u)
Description
NetBIOS Name Service port
5.8.18.6 Building the Library
This section list the files that are available in the \src of the NBNS driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
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5.8.18.7 Library Interface
Data Types and Constants
Name Description
NBNS_MODULE_CONFIG Provides a placeholder for NBNS configuration upgrades.
Description
5.8.18.7.1 Data Types and Constants
5.8.18.7.1.1 NBNS_MODULE_CONFIG Structure
C
typedef struct {
} NBNS_MODULE_CONFIG;
Description
NBNS_MODULE_CONFIG Structure Typedef
Provides a placeholder for NBNS configuration upgrades.
Remarks
None
5.8.18.8 Files
Files
Name Description
nbns.h
nbns_config.h NBNS configuration file
Description
5.8.18.8.1 nbns.h
NetBIOS Name Service (NBNS) Server public API
-Responds to NBNS name requests to allow human name assignment to the board
Structures
Name Description
NBNS_MODULE_CONFIG Provides a placeholder for NBNS configuration upgrades.
5.8.18.8.2 nbns_config.h
NetBIOS Name Service (NBNS) Configuration file
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This file contains the NBNS module configuration options
Macros
Name Description
NBNS_PORT NetBIOS Name Service port
5.8.19 NDP TCP/IP Stack Library
5.8.19.1 Introduction
NDP TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the NDP ( Neighbor Discovery Protocol) TCP/IP Module that is available on the Microchip family
of microcontrollers with a convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
This document provides NDP( Neighbor Discovery Protocol) for IP version 6.IPv6 nodes on same link use neighbor discovery to
discover each other's presence. RFC - 4861.
It is responsible for
1. Address Auto configuration of nodes
2. Discovery of other nodes in the link( It can be a Router Discovery or Neighbor Discovery)
3. Determining the link layer address of other nodes
4. Duplicate address detection ( DAD)
5. Finding available routers and Domain Name System ( DNS) servers
6. Address Prefix discovery
7. Parameter Discovery (Such as Link MTU or Hop limit )
Comparing with IPv4
• NDP is a substitute of ARP (Address Resolution protocol ). This new mechanism uses a mix of ICMPv6 and multicast
addresses to discover the IPv6 node on same link.
• NDP includes Neighbor Unreachability Detection (NUD) , thus improving the robustness of packet delivery.
• Unlike IPv4 broadcast addresses, IPv6 address resolution multicasts are spread over 4 billion (2^32) multicast addresses,
greatly reducing address resolution-related interrupts on nodes other than the target. Moreover, non-IPv6 machines should
not be interrupted at all.
• Neighbor Discovery defines five different ICMPv6 packet types.
Five different ICMPv6 Packet types -
1. Router Solicitation - Hosts inquire with Router Solicitation message to locate routers on the attached link.
2. Router Advertisement - Router advertise their presence periodically to all the nodes or in response to the Router Solicitation
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message.
3. Neighbor Solicitation - Neighbor solicitations are used by nodes to determine the Link Layer address of a neighbor, or to
verify that a neighbor is still reachable via a cached Link Layer address.
4. Neighbor Advertisement - Neighbor advertisements are used by nodes to respond to a Neighbor Solicitation message
5. Redirect - Routers may inform hosts of a better first hop router for a destination.
5.8.19.2 Release Notes
MPLAB Harmony Version: v0.70b NDP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.19.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.19.4 Using the Library
This topic describes the basic architecture of the NDP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: ndp.h
The interface to the NDP TCP/IP Stack Library is defined in the "ndp.h" header file. Any C language source (.c) file that uses the
NDP TCP/IP library should include "IPv6.h , icmpv6.h and ndp.h".
Library File:
The NDP TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack Library interacts with the framework.
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5.8.19.4.1 Abstraction Model
This library provides the API of the NDP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
NDP with IPv6 Software Abstraction Block Diagram
This module provides software abstraction of the IPv6 module existent in any TCP/IP Stack implementation. It removes the
overhead of address resolution from all other modules in the stack.
IPv6 Block Diagram
--------------------------------------
Link Layer Neighbor Discovery
1) Using the address FEC0::1:0:0:1 :A, node A wants to deliver packets to destination node B using the IPv6 address FEC0::1
:0:0:1 :B on the same local link. However, node A does not know node B's link-layer address. Node A sends an ICMPv6 Type
135 message (neighbor solicitation) on the local link using its site-local address FEC0::1:0:0:1:A as the IPv6 source address, the
solicited-node multicast address FF02::1 :FF01:B corresponding to the target address FEC0::1 :0:0:1 :B as the destination IPv6
address, and the source link-layer address 00:04:a3:13:12:b4 of the sender, node A, as data of the ICMPv6 message. The
source link-layer address of this frame is the link-layer address 00:04:a3:13:12:b4 of node A. The destination link-layer address
33:33:FF:01 :00:0B of this frame uses multicast mapping of the destination IPv6 address FF02::1 :FF01 :B.
2) Node B, which is listening to the local link for multicast addresses, intercepts the neighbor solicitation message because the
destination IPv6 address FF02::1:FF01:B represents the solicited-node multicast address corresponding to its IPv6 address
FEC0::1:0:0:1:B.
3) Node B replies by sending a neighbor advertisement message using its site-local address FEC0::1 :0:0:1 :B as the IPv6
source address and the site-local address FEC0::1 :0:0:1 :A as the destination IPv6 address. It also includes its link-layer
address 00:04:a3:13:12:b5 in the ICMPv6 message. After receiving neighbor solicitation and neighbor advertisement messages,
node A and node B know each other's link-layer addresses.
Learned link-layer addresses are kept in a neighbor discovery table (neighbor cache). Therefore, the nodes can communicate on
the local link. The neighbor solicitation message is also used by nodes to verify the reachability of neighbor nodes in the
neighbor discovery table (neighbor cache). However, the unicast addresses of the neighbor nodes are used as destination IPv6
addresses in ICMPv6 messages instead of solicited-node multicast addresses in this situation. It is possible for a node that
changes its link-layer address to inform all other neighbor nodes on the local link by sending a neighbor advertisement message
using the all-nodes multicast address FF02::1 . The neighbor discovery table of the nodes on the local link is updated with the
new linklayer address.
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5.8.19.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the IPv6 , ICMPv6 and NDP module.
Library Interface Section Description
Reachability Functions Reachability routine functionality
5.8.19.5 Configuring the Library
Macros
Name Description
DELAY_FIRST_PROBE_TIME 5 s
IPV6_MTU_INCREASE_TIMEOUT 600 seconds
MAX_ANYCAST_DELAY_TIME 1 s
MAX_MULTICAST_SOLICIT 3 transmissions
MAX_NEIGHBOR_ADVERTISEMENT 3 transmissions
MAX_RTR_SOLICITATION_DELAY 1 s
MAX_RTR_SOLICITATIONS 3 transmissions
MAX_UNICAST_SOLICIT 3 transmissions
NDP_TASK_TIMER_RATE default 32 ms
NDP_VALID_LIFETIME_TWO_HOURS Sets the lifetime to 2 hours
REACHABLE_TIME 30 s
RETRANS_TIMER 1 s
RTR_SOLICITATION_INTERVAL 4 s
Description
The configuration of the TCPIP Stack IPv6 is based on the file ndp_config.h
This header file contains the configuration selection for the TCPIP Stack IP. Based on the selections made, the TCPIP Stack IP
will support or not support selected features. These configuration settings will apply to all instances of the TCPIP Stack IP.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
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successful build.
5.8.19.5.1 DELAY_FIRST_PROBE_TIME Macro
C
#define DELAY_FIRST_PROBE_TIME 5u // 5 s
Description
5 s
5.8.19.5.2 IPV6_MTU_INCREASE_TIMEOUT Macro
C
#define IPV6_MTU_INCREASE_TIMEOUT 600ul // 600 seconds
Description
600 seconds
5.8.19.5.3 MAX_ANYCAST_DELAY_TIME Macro
C
#define MAX_ANYCAST_DELAY_TIME 1u // 1 s
Description
1 s
5.8.19.5.4 MAX_MULTICAST_SOLICIT Macro
C
#define MAX_MULTICAST_SOLICIT 3u // 3 transmissions
Description
3 transmissions
5.8.19.5.5 MAX_NEIGHBOR_ADVERTISEMENT Macro
C
#define MAX_NEIGHBOR_ADVERTISEMENT 3u // 3 transmissions
Description
3 transmissions
5.8.19.5.6 MAX_RTR_SOLICITATION_DELAY Macro
C
#define MAX_RTR_SOLICITATION_DELAY 1u // 1 s
Description
1 s
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5.8.19.5.7 MAX_RTR_SOLICITATIONS Macro
C
#define MAX_RTR_SOLICITATIONS 3u // 3 transmissions
Description
3 transmissions
5.8.19.5.8 MAX_UNICAST_SOLICIT Macro
C
#define MAX_UNICAST_SOLICIT 3u // 3 transmissions
Description
3 transmissions
5.8.19.5.9 NDP_TASK_TIMER_RATE Macro
C
#define NDP_TASK_TIMER_RATE (32) // default 32 ms
Description
default 32 ms
5.8.19.5.10 NDP_VALID_LIFETIME_TWO_HOURS Macro
C
#define NDP_VALID_LIFETIME_TWO_HOURS (60 * 60 * 2)
Description
Sets the lifetime to 2 hours
5.8.19.5.11 REACHABLE_TIME Macro
C
#define REACHABLE_TIME 30u // 30 s
Description
30 s
5.8.19.5.12 RETRANS_TIMER Macro
C
#define RETRANS_TIMER 1u // 1 s
Description
1 s
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5.8.19.5.13 RTR_SOLICITATION_INTERVAL Macro
C
#define RTR_SOLICITATION_INTERVAL 4u // 4 s
Description
4 s
5.8.19.6 Building the Library
This section list the files that are available in the \src of the IPv6 and ICMPv6 driver. It lists which files need to be included in the
build based on either a hardware feature present on the board or configuration option selected by the system.
• ipv6.c
• icmpv6.c
• ndp.c
TCPIP_STACK_USE_IPV6 is enabled from tcpip_config.h .
5.8.19.7 Library Interface
Reachability Functions
Name Description
TCPIP_NDP_NborReachConfirm Confirms that a neighbor is reachable.
Description
This section describes the Application Programming Interface (API) functions of the NDP TCP/IP Stack Library.
Refer to each section for a detailed description.
5.8.19.7.1 Reachability Functions
5.8.19.7.1.1 TCPIP_NDP_NborReachConfirm Function
C
void TCPIP_NDP_NborReachConfirm(
TCPIP_NET_HANDLE netH,
IPV6_ADDR * address
);
Description
This function is used by upper-layer protocols to indicate that round-trip communications were confirmed with a neighboring node.
Preconditions
None
Parameters
Parameters Description
pNetIf The interface the neighbor is on.
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address The address of the neighbor.
Returns
None.
Remarks
None
5.8.19.8 Files
Files
Name Description
ndp.h IPv6 Internet Communication Message Protocol
ndp_config.h NDP configuration file
Description
5.8.19.8.1 ndp.h
Neighbor Discovery Protocol (NDP) in IPv6 is the substitute of as ARP( Which is used in IPv4 for address resolve).NDP is used
discover link local addresses of the IPv6 nodes present in the local link using a mix of ICMPv6 messages and multicast
addresses, Stateless auto-configuration and router redirection.
Functions
Name Description
TCPIP_NDP_NborReachConfirm Confirms that a neighbor is reachable.
File Name
ndp.h
Company
Microchip Technology Incorporated
5.8.19.8.2 ndp_config.h
Neighbor Discovery Protocol (NDP) Configuration file
This file contains the NDP module configuration options
Macros
Name Description
DELAY_FIRST_PROBE_TIME 5 s
IPV6_MTU_INCREASE_TIMEOUT 600 seconds
MAX_ANYCAST_DELAY_TIME 1 s
MAX_MULTICAST_SOLICIT 3 transmissions
MAX_NEIGHBOR_ADVERTISEMENT 3 transmissions
MAX_RTR_SOLICITATION_DELAY 1 s
MAX_RTR_SOLICITATIONS 3 transmissions
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MAX_UNICAST_SOLICIT 3 transmissions
NDP_TASK_TIMER_RATE default 32 ms
NDP_VALID_LIFETIME_TWO_HOURS Sets the lifetime to 2 hours
REACHABLE_TIME 30 s
RETRANS_TIMER 1 s
RTR_SOLICITATION_INTERVAL 4 s
5.8.20 Reboot TCP/IP Stack Library
5.8.20.1 Introduction
Reboot TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the Reboot TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The Reboot module will allow a user to remotely reboot the PIC microcontroller that is running the TCP/IP stack. This feature is
primarily used for bootloader applications, which must reset the microcontroller to enter the bootloader code section. This
module will execute a task that listens on a specified UDP port for a packet, and then reboots if it receives one.
5.8.20.2 Release Notes
Harmony Version: v0.70b Reboot TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.20.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
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ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.20.4 Using the Library
This topic describes the basic architecture of the Reboot TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: tcpip_reboot_config.h
The interface to the Reboot TCP/IP Stack library is defined in the "tcpip_reboot_config.h" header file. This file is included by the
"tcpip.h" file. Any C language source (.c) file that uses the Reboot TCP/IP Stack library should include "tcpip.h".
Library File:
The Reboot TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.20.4.1 Abstraction Model
This library provides the API of the Reboot TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
Reboot Software Abstraction Block Diagram
Note: This image was not available at time of release and will be added in a future release of MPLAB Harmony.
5.8.20.5 Configuring the Library
Macros
Name Description
REBOOT_PORT UDP TFTP port
REBOOT_SAME_SUBNET_ONLY For improved security, you might want to limit reboot capabilities to only users
on the same IP subnet. Define REBOOT_SAME_SUBNET_ONLY to enable
this access restriction.
Description
The configuration of the Reboot TCP/IP Stack Library is based on the file tcpip_config.h
This header file contains the configuration selection for the Reboot TCP/IP Stack Library. Based on the selections made, the
Reboot TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all instances
of the Reboot TCP/IP Stack Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
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successful build. Refer to the Applications Overview section for more details.
5.8.20.5.1 REBOOT_PORT Macro
C
#define REBOOT_PORT 69
Description
UDP TFTP port
5.8.20.5.2 REBOOT_SAME_SUBNET_ONLY Macro
C
#define REBOOT_SAME_SUBNET_ONLY
Description
For improved security, you might want to limit reboot capabilities to only users on the same IP subnet. Define
REBOOT_SAME_SUBNET_ONLY to enable this access restriction.
5.8.20.6 Building the Library
This section list the files that are available in the \src of the Reboot driver. It lists which files need to be included in the build
based on either a hardware feature present on the board or configuration option selected by the system.
5.8.20.7 Library Interface
This section describes the Application Programming Interface (API) functions of the Reboot TCP/IP Stack, if applicable.
5.8.20.8 Files
Files
Name Description
tcpip_reboot_config.h Configuration file
Description
5.8.20.8.1 tcpip_reboot_config.h
Reboot Configuration file
This file contains the Reboot module configuration options
Macros
Name Description
REBOOT_PORT UDP TFTP port
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REBOOT_SAME_SUBNET_ONLY For improved security, you might want to limit reboot capabilities to only users
on the same IP subnet. Define REBOOT_SAME_SUBNET_ONLY to enable
this access restriction.
5.8.21 SMTP TCP/IP Stack Library
5.8.21.1 Introduction
Simple Mail Transfer Protocol (SMTP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the SMTP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The SMTP client module in the TCP/IP Stack lets applications send e-mails to any recipient worldwide. These message could
include status information or important alerts. Using the e-mail to SMS gateways provided by most cell phone carriers, these
messages can also be delivered directly to cell phone handsets.
Using the SMTP client requires access to a local mail server (such as mail.yourdomain.com) for reliable operation. Your MPLAB
Harmony or network administrator can provide the correct address, but end-user applications will need an interface to provide
this data.
5.8.21.2 Release Notes
MPLAB Harmony Version: v0.70b SMTP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.21.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.21.4 Using the Library
This topic describes the basic architecture of the SMTP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: smtp.h
The interface to the SMTP TCP/IP Stack library is defined in the "smtp.h" header file. This file is included by the "tcpip.h" file. Any
C language source (.c) file that uses the SMTP TCP/IP Stack library should include "tcpip.h".
Library File:
The SMTP TCPIP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.21.4.1 Abstraction Model
This library provides the API of the SMTP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
SMTP Software Abstraction Block Diagram
Note: This image was not available at time of release and will be added in a future release of MPLAB Harmony.
5.8.21.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the SMTP module.
Library Interface Section Description
Functions Routines to configure this module
Data Types and Constants This section provides various definitions describing this API
5.8.21.4.3 SMTP Client Examples
Module
SMTP Client
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Description
The following two examples demonstrate the use of the SMTP client in different scenarios. The first, and simpler example,
sends a short message whose contents are all located in RAM at once.
The second example is more involved and demonstrates generating a message on the fly in the case where the entire
message cannot fit into RAM at once. In this case, the message
5.8.21.4.3.1 SMTP Client Short Message Example
The SMTP client API is simplified when messages can be buffered entirely in RAM. The SMTPDemo ( see page 99) example
provided in MainDemo.c sends a brief e-mail message indicating the current status of the board's buttons. This document will
walk through that example.
Make sure STACK_USE_SMTP_CLIENT is uncommented in TCPIPConfig.h before continuing.
The following diagram provides an overview of the process:
First, call SMTPBeginUsage ( see page 304) to verify that the SMTP client is available and to begin a new message. If FALSE is
returned, the SMTP client is busy and the application must return to the main loop to allow StackTask to execute again.
Next, set the local relay server to use as SMTPClient.Server. If the local relay server requires a user name and password, set
SMTPClient.Username and SMTPClient.Password to the appropriate credentials.
If server parameters are not set, the stack will attempt to deliver the message directly to its destination host. This will likely fail
due to spam prevention measures put in place by most ISPs and network administrators.
Continue on to set the header strings as necessary for the message. This includes the subject line, from address, and any
recipients you need to add. Finally, set SMTPClient.Body to the message to be sent.
At this point, verify that SMTPClient.ROMPointers is correctly configured for any strings that are stored in program memory.
Once the message is ready to send, call SMTPSendMail ( see page 310) to instruct the SMTP client to begin transmission.
The application must now call SMTPIsBusy ( see page 306) until it returns FALSE. Each time TRUE is returned, return to the
main loop and wait for StackTask to execute again. This allows the SMTP server to continue its work in a cooperative
multitasking manner. Once FALSE is returned, call SMTPEndUsage ( see page 305) to release the SMTP client. Check the
return value of this function to determine if the message was successfully sent.
The example in MainDemo.c needs minor modifications to use your e-mail address. The Server and To fields must be set in
SMTPDemo ( see page 99) in order for the message to be properly delivered. Once this is done, holding down BUTTON2 and
BUTTON3 simultaneously (the left-most two buttons) will begin sending the message. LED1 will light as the message is being
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processed, and will extinguish when the SMTP state machine completes. If the transmission was successful LED2 will light,
otherwise it will remain dark.
5.8.21.4.3.2 SMTP Client Long Message Example
The SMTP client API is capable of sending messages that do not fit entirely in RAM. To do so, the application must manage its
output state and only write as many bytes as are available in the buffer at a time. The second SMTPDemo ( see page 99)
example provided in MainDemo.c sends a message that is a dump of all contents of the PIC's RAM. This example is currently
commented out. Comment out the previous Short Message Example and uncomment the Long Message Example. This
document will walk through sending a longer message.
Make sure STACK_USE_SMTP_CLIENT is uncommented in TCPIPConfig.h before continuing.
Sending longer messages is divided into three stages. The first stage configures the SMTP client to send the message. The
second stage sends the message in small chunks as buffer space is available. The final stage finishes the transmission and
determines whether or not the message was successful.
The following diagram illustrates the first stage:
The first stage is largely similar to the first few steps in sending a short message. First, call SMTPBeginUsage ( see page 304) to
verify that the SMTP client is available and to begin a new message. If FALSE is returned, the SMTP client is busy and the
application must return to the main loop to allow StackTask to execute again.
Next, set the local relay server to use as SMTPClient.Server. If the local relay server requires a user name and password, set
SMTPClient.Username and SMTPClient.Password to the appropriate credentials.
If server parameters are not set, the stack will attempt to deliver the message directly to its destination host. This will likely fail
due to spam prevention measures put in place by most ISPs and network administrators.
Continue on to set the header strings as necessary for the message. This includes the subject line, from address, and any
recipients you need to add.
The next portion of the process differs. Ensure that SMTPClient.Body remains set to its default (NULL). At this point, call
SMTPSendMail ( see page 310) to open a connection to the remote server and transmit the headers. The application is now
ready to proceed to the second stage and send the message body.
The following diagram provides an overview of stage two and three:
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Upon entering stage two, the application should call SMTPIsBusy ( see page 306) to verify that the connection to the remote
server is active and has not been lost. If the call succeeds, call SMTPIsPutReady ( see page 306) to determine how many bytes
are available in the TX buffer. If no bytes are available, return to the main loop so that StackTask can transmit the data to the
remote node and free up the buffer.
If space is available, any combination of the SMTPPut ( see page 307), SMTPPutArray ( see page 307), SMTPPutROMArray (
see page 308), SMTPPutString ( see page 309), and SMTPPutROMString ( see page 309) functions may be called to transmit
the message. These functions return the number of bytes successfully written. Use this value, along with the value originally
returned from SMTPIsPutReady ( see page 306) to track how much free space remains in the TX buffer. Once the buffer is
depleted, call SMTPFlush ( see page 305) to force the data written to be sent.
The SMTP client module can accept ( see page 170) as much data as the TCP TX FIFO can hold. This is determined by the
socket initializer for TCP_PURPOSE_DEFAULT type sockets in TCPIPConfig.h, which defaults to 200 bytes.
If the TX buffer is exhausted before the message is complete, return to the main loop so that StackTask may transmit the data to
the remote node and free up the buffer. Upon return, go to the beginning of the second stage to transmit the next portion of the
message.
Once the message is complete, the application will move to the third stage. Call SMTPPutDone ( see page 308) to inform the
SMTP client that no more data remains. Then call SMTPIsBusy ( see page 306) repeatedly. Each time TRUE is returned, return
to the main loop and wait for StackTask to execute again. Once FALSE is returned, the message transmission has completed
and the application must call SMTPEndUsage ( see page 305) to release the SMTP client. Check the return value of this function
to determine if the message was successfully sent.
The example in MainDemo.c needs minor modifications to use your e-mail address. Set the Server and To fields in SMTPDemo
( see page 99), and ensure that these fields are being properly assigned to SMTPClient ( see page 305) struct. The demo works
exactly the same way as the previous one, with BUTTON2 and BUTTON3 held down simultaneously (the left-most two buttons)
kicking off the state machine. LED1 will light as the message is being processed, and will extinguish when the SMTP state
machine completes. If the transmission was successful LED2 will light, otherwise it will remain dark.
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5.8.21.5 Configuring the Library
Macros
Name Description
MAX_SMTP_CONNECTIONS Maximum number of SMTP connections allowed
SMTP_PORT Default port to use when unspecified
SMTP_SERVER_REPLY_TIMEOUT How long to wait before assuming the connection has been dropped (default
8 seconds)
Description
The configuration of the SMPT TCP/IP Stack Library is based on the file tcpip_config.h
This header file contains the configuration selection for the SMTP TCP/IP Stack Library. Based on the selections made, the
SMTP TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all instances
of the SMTP TCP/IP Stack Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.21.5.1 MAX_SMTP_CONNECTIONS Macro
C
#define MAX_SMTP_CONNECTIONS (1)
Description
Maximum number of SMTP connections allowed
5.8.21.5.2 SMTP_PORT Macro
C
#define SMTP_PORT 25
Description
Default port to use when unspecified
5.8.21.5.3 SMTP_SERVER_REPLY_TIMEOUT Macro
C
#define SMTP_SERVER_REPLY_TIMEOUT (8ul)
Description
How long to wait before assuming the connection has been dropped (default 8 seconds)
5.8.21.6 Building the Library
This section list the files that are available in the \src of the SMTP driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
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5.8.21.7 Library Interface
Functions
Name Description
TCPIP_SMTP_ArrayPut Writes a series of bytes to the SMTP client.
TCPIP_SMTP_Flush Flushes the SMTP socket and forces all data to be sent.
TCPIP_SMTP_IsBusy Determines if the SMTP client is busy.
TCPIP_SMTP_IsPutReady Determines how much data can be written to the SMTP client.
TCPIP_SMTP_MailSend Initializes the message sending process.
TCPIP_SMTP_Put Writes a single byte to the SMTP client.
TCPIP_SMTP_PutIsDone Indicates that the on-the-fly message is complete.
TCPIP_SMTP_StringPut Writes a string to the SMTP client.
TCPIP_SMTP_UsageBegin Requests control of the SMTP client module.
TCPIP_SMTP_UsageEnd Releases control of the SMTP client module.
Data Types and Functions
Name Description
SMTP_CONNECT_ERROR Connection to SMTP server failed
SMTP_RESOLVE_ERROR DNS lookup for SMTP server failed
SMTP_SUCCESS Message was successfully sent
SMTP_CLIENT_MODULE_CONFIG This is type SMTP_CLIENT_MODULE_CONFIG.
SMTP_POINTERS Configures the SMTP client to send a message
Description
This section describes the Application Programming Interface (API) functions of the SMTP TCP/IP Stack.
Refer to each section for a detailed description.
5.8.21.7.1 Functions
5.8.21.7.1.1 TCPIP_SMTP_ArrayPut Function
C
uint16_t TCPIP_SMTP_ArrayPut(
uint8_t* Data,
uint16_t Len
);
Description
Writes a series of bytes to the SMTP client.
Preconditions
TCPIP_SMTP_UsageBegin returned true on a previous call.
Parameters
Parameters Description
Data The data to be written
Len How many bytes should be written
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Returns
The number of bytes written. If less than Len, then the TX FIFO became full before all bytes could be written.
Remarks
This function should only be called externally when the SMTP client is generating an on-the-fly message. (That is,
TCPIP_SMTP_MailSend was called with SMTPClient.Body set to NULL.)
5.8.21.7.1.2 TCPIP_SMTP_Flush Function
C
void TCPIP_SMTP_Flush();
Description
Flushes the SMTP socket and forces all data to be sent.
Preconditions
TCPIP_SMTP_UsageBegin returned true on a previous call.
Returns
None
Remarks
This function should only be called externally when the SMTP client is generating an on-the-fly message. (That is,
TCPIP_SMTP_MailSend was called with SMTPClient.Body set to NULL.)
5.8.21.7.1.3 TCPIP_SMTP_IsBusy Function
C
bool TCPIP_SMTP_IsBusy();
Description
Call this function to determine if the SMTP client is busy performing background tasks. This function should be called after any
call to TCPIP_SMTP_MailSend, TCPIP_SMTP_PutIsDone to determine if the stack has finished performing its internal tasks. It
should also be called prior to any call to TCPIP_SMTP_IsPutReady to verify that the SMTP client has not prematurely
disconnected. When this function returns false, the next call should be to TCPIP_SMTP_UsageEnd to release the module and
obtain the status code for the operation.
Preconditions
TCPIP_SMTP_UsageBegin returned true on a previous call.
Return Values
Return Values Description
true The SMTP Client is busy with internal tasks or sending an on-the-fly message.
false The SMTP Client is terminated and is ready to be released.
5.8.21.7.1.4 TCPIP_SMTP_IsPutReady Function
C
uint16_t TCPIP_SMTP_IsPutReady();
Description
Use this function to determine how much data can be written to the SMTP client when generating an on-the-fly message.
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Preconditions
TCPIP_SMTP_UsageBegin returned true on a previous call, and an on-the-fly message is being generated. This requires that
TCPIP_SMTP_MailSend was called with SMTPClient.Body set to NULL.
Returns
The number of free bytes the SMTP TX FIFO.
Remarks
This function should only be called externally when the SMTP client is generating an on-the-fly message. (That is,
TCPIP_SMTP_MailSend was called with SMTPClient.Body set to NULL.)
5.8.21.7.1.5 TCPIP_SMTP_MailSend Function
C
void TCPIP_SMTP_MailSend(
SMTP_POINTERS* smtpClientMessage
);
Description
This function starts the state machine that performs the actual transmission of the message. Call this function after all the fields
in SMTPClient have been set.
Preconditions
TCPIP_SMTP_UsageBegin returned true on a previous call.
Parameters
Parameters Description
smtpClientMessage message to send
Returns
None
5.8.21.7.1.6 TCPIP_SMTP_Put Function
C
bool TCPIP_SMTP_Put(
char c
);
Description
Writes a single byte to the SMTP client.
Preconditions
TCPIP_SMTP_UsageBegin returned true on a previous call.
Parameters
Parameters Description
c The byte to be written
Return Values
Return Values Description
true The byte was successfully written
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false The byte was not written, most likely because the buffer was full
Remarks
This function should only be called externally when the SMTP client is generating an on-the-fly message. (That is,
TCPIP_SMTP_MailSend was called with SMTPClient.Body set to NULL.)
5.8.21.7.1.7 TCPIP_SMTP_PutIsDone Function
C
void TCPIP_SMTP_PutIsDone();
Description
Indicates that the on-the-fly message is complete.
Preconditions
TCPIP_SMTP_UsageBegin returned true on a previous call, and the SMTP client is generated an on-the-fly message. (That is,
TCPIP_SMTP_MailSend was called with SMTPClient.Body set to NULL.)
Returns
None
5.8.21.7.1.8 TCPIP_SMTP_StringPut Function
C
uint16_t TCPIP_SMTP_StringPut(
char* Data
);
Description
Writes a string to the SMTP client.
Preconditions
TCPIP_SMTP_UsageBegin returned true on a previous call.
Parameters
Parameters Description
Data The data to be written
Returns
The number of bytes written. If less than the length of Data, then the TX FIFO became full before all bytes could be written.
Remarks
This function should only be called externally when the SMTP client is generating an on-the-fly message. (That is,
TCPIP_SMTP_MailSend was called with SMTPClient.Body set to NULL.)
5.8.21.7.1.9 TCPIP_SMTP_UsageBegin Function
C
bool TCPIP_SMTP_UsageBegin();
Description
Call this function before calling any other SMTP Client APIs. This function obtains a lock on the SMTP Client, which can only be
used by one stack application at a time. Once the application is finished with the SMTP client, it must call
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TCPIP_SMTP_UsageEnd to release control of the module to any other waiting applications.
This function initializes all the SMTP state machines and variables back to their default state.
Preconditions
None
Return Values
Return Values Description
true The application has successfully obtained control of the module
false The SMTP module is in use by another application. Call
TCPIP_SMTP_UsageBegin again later, after returning to the main program loop
5.8.21.7.1.10 TCPIP_SMTP_UsageEnd Function
C
uint16_t TCPIP_SMTP_UsageEnd();
Description
Call this function to release control of the SMTP client module once an application is finished using it. This function releases the
lock obtained by TCPIP_SMTP_UsageBegin, and frees the SMTP client to be used by another application.
Preconditions
TCPIP_SMTP_UsageBegin returned true on a previous call.
Return Values
Return Values Description
SMTP_SUCCESS A message was successfully sent
SMTP_RESOLVE_ERROR The SMTP server could not be resolved
SMTP_CONNECT_ERROR The connection to the SMTP server failed or was prematurely terminated
1-199 and 300-399 The last SMTP server response code
5.8.21.7.2 Data Types and Functions
5.8.21.7.2.1 SMTP_CONNECT_ERROR Macro
C
#define SMTP_CONNECT_ERROR (0x8001u) // Connection to SMTP server failed
Description
Connection to SMTP server failed
5.8.21.7.2.2 SMTP_RESOLVE_ERROR Macro
C
#define SMTP_RESOLVE_ERROR (0x8000u) // DNS lookup for SMTP server failed
Description
DNS lookup for SMTP server failed
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5.8.21.7.2.3 SMTP_SUCCESS Macro
C
#define SMTP_SUCCESS (0x0000u) // Message was successfully sent
Description
Message was successfully sent
5.8.21.7.2.4 SMTP_CLIENT_MODULE_CONFIG Structure
C
typedef struct {
} SMTP_CLIENT_MODULE_CONFIG;
Description
This is type SMTP_CLIENT_MODULE_CONFIG.
5.8.21.7.2.5 SMTP_POINTERS Structure
C
typedef struct {
char* Server;
char* Username;
char* Password;
char* To;
char* CC;
char* BCC;
char* From;
char* Subject;
char* OtherHeaders;
char* Body;
bool UseSSL;
uint16_t ServerPort;
} SMTP_POINTERS;
Description
This structure of pointers configures the SMTP Client to send an e-mail message.
Parameters
Parameters Description
Server the SMTP server to relay the message through
Username the user name to use when logging into the SMTP server, if any is required
Password the password to supply when logging in, if any is required
To the destination address for this message. May be a comma-separated list of
addresss, and/or formatted.
CC The CC addresses for this message, if any. May be a comma-separated list of
addresss, and/or formatted.
BCC The BCC addresses for this message, if any. May be a comma-separated list of
addresss, and/or formatted.
From The From address for this message. May be formatted.
Subject The Subject header for this message.
OtherHeaders Any additional headers for this message. Each additional header, including the
last one, must be terminated with a CRLF pair.
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Body When sending a message from memory, the location of the body of this message
in memory. Leave as NULL to build a message on-the-fly.
UseSSL When TCPIP_STACK_USE_SSL_CLIENT is enabled, this flag causes the SMTP
client to make an SSL connection to the server.
ServerPort (uint16_t value) Indicates the port on which to connect to the remote SMTP server.
Remarks
When formatting an e-mail address, the SMTP standard format for associating a printable name may be used. This format
places the printable name in quotation marks, with the address following in pointed brackets, such as "John Smith"
5.8.21.8 Files
Files
Name Description
smtp.h Module for Microchip TCP/IP Stack
smtp_config.h SMTP configuration file
Description
5.8.21.8.1 smtp.h
Simple Mail Transfer Protocol (SMTP) Client
Functions
Name Description
TCPIP_SMTP_ArrayPut Writes a series of bytes to the SMTP client.
TCPIP_SMTP_Flush Flushes the SMTP socket and forces all data to be sent.
TCPIP_SMTP_IsBusy Determines if the SMTP client is busy.
TCPIP_SMTP_IsPutReady Determines how much data can be written to the SMTP client.
TCPIP_SMTP_MailSend Initializes the message sending process.
TCPIP_SMTP_Put Writes a single byte to the SMTP client.
TCPIP_SMTP_PutIsDone Indicates that the on-the-fly message is complete.
TCPIP_SMTP_StringPut Writes a string to the SMTP client.
TCPIP_SMTP_UsageBegin Requests control of the SMTP client module.
TCPIP_SMTP_UsageEnd Releases control of the SMTP client module.
Macros
Name Description
SMTP_CONNECT_ERROR Connection to SMTP server failed
SMTP_RESOLVE_ERROR DNS lookup for SMTP server failed
SMTP_SUCCESS Message was successfully sent
Structures
Name Description
SMTP_CLIENT_MODULE_CONFIG This is type SMTP_CLIENT_MODULE_CONFIG.
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SMTP_POINTERS Configures the SMTP client to send a message
5.8.21.8.2 smtp_config.h
Simple Mail Transfer Protocol (SMTP) Configuration file
This file contains the SMTP module configuration options
Macros
Name Description
MAX_SMTP_CONNECTIONS Maximum number of SMTP connections allowed
SMTP_PORT Default port to use when unspecified
SMTP_SERVER_REPLY_TIMEOUT How long to wait before assuming the connection has been dropped (default
8 seconds)
5.8.22 SNMP TCP/IP Stack Library
5.8.22.1 Introduction
Simple Network Management Protocol (SNMP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the SNMP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
5.8.22.2 Release Notes
MPLAB Harmony Version: v0.70b SNMP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.22.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
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licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.22.4 Using the Library
This topic describes the basic architecture of the SNMP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: snmp.h
The interface to the SNMP TCP/IP Stack library is defined in the "snmp.h" header file. This file is included by the "tcpip.h" file.
Any C language source (.c) file that uses the SNMP TCP/IP Stack library should include "tcpip.h".
Library File:
The SNMP TCPIP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.22.4.1 Abstraction Model
This library provides the API of the SNMP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
SNMP Software Abstraction Block Diagram
Note: This image was not available at time of release and will be added in a future release of MPLAB Harmony.
5.8.22.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the SNMP module.
Library Interface Section Description
SNMP Module Functions Routines to configure this module
SNMPv3 Module Functions Routines to configure this module
SNMP Application Functions Routines to configure an application
SNMPv3 Application Functions Routines to configure an application
SNMP Data Types and Constants This section provides various definitions describing this API
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SNMPv3 Data Types and Constants This section provides various definitions describing this API
5.8.22.5 Configuring the Library
Macros
Name Description
AUTH_LOCALIZED_PASSWORD_KEY_LEN SNMPv3 Authentication Localized passwed
key lenegth size
END_OF_SNMP_READ_COMMUNITIES ??
END_OF_SNMP_WRITE_COMMUNITIES ??
MY_DEFAULT_SNMP_IF For multi-homed hosts, the default SNMP
interface
NOTIFY_COMMUNITY_LEN Length of Community name array
OID_MAX_LEN Change this to match your OID string length.
PRIV_LOCALIZED_PASSWORD_KEY_LEN SNMPv3 Privacy Pasword key length size
SNMP_BIB_FILE_NAME Name of the bib file for snmp
SNMP_COMMUNITY_MAX_LEN This is the maximum length for community
string. Application must ensure that this
length is observed. SNMP module adds one
byte extra after
SNMP_COMMUNITY_MAX_LEN for adding
'0' NULL character.
SNMP_MAX_COMMUNITY_SUPPORT Specifying more strings than
SNMP_MAX_COMMUNITY_SUPPORT will
result in the later strings being ignored (but
still wasting program memory). Specifying
fewer strings is legal, as long as at least one
is present.
SNMP_MAX_MSG_SIZE SNMP MIN and MAX message 484 bytes in
size. As per RFC 3411
snmpEngineMaxMessageSize and RFC
1157 ( section 4- protocol specification ) and
implementation supports more than 484
whenever feasible.
SNMP_MAX_NON_REC_ID_OID Update the Non record id OID value which is
part of CustomSnmpDemo.c file
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SNMP_READ_COMMUNITIES Default SNMPv2C community names. These
can be overridden at run time if alternate
strings are present in external EEPROM or
Flash (actual strings coould be stored by the
TCPIP storage service. These strings are
case sensitive. An empty string means
disabled (not matchable). For application
security, these default community names
should not be used, but should all be
disabled to force the end user to select
unique community names. These defaults
are provided only to make it easier to start
development. Specifying more strings than
SNMP_MAX_COMMUNITY_SUPPORT will
result in the later strings being ignored (but
still wasting program memory). Specifying...
more
SNMP_TRAP_COMMUNITY_MAX_LEN_MEM_USE This macro will be used to avoid SNMP OID
memory buffer corruption
SNMP_WRITE_COMMUNITIES Default SNMPv2C community names. See
SNMP_READ_COMMUNITIES for more
information.
SNMPV3_AUTH_LOCALIZED_PASSWORD_KEY_LEN_MEM_USE SNMPv3 authentication localized Key length
for memory validation
SNMPV3_PRIV_LOCALIZED_PASSWORD_KEY_LEN_MEM_USE SNMPv3 privacy key length size for memory
validation
SNMPV3_TRAP_MSG_PROCESS_MODEL_DB This is macro
SNMPV3_TRAP_MSG_PROCESS_MODEL
_DB.
SNMPV3_TRAP_SECURITY_LEVEL_DB This is macro
SNMPV3_TRAP_SECURITY_LEVEL_DB.
SNMPV3_TRAP_SECURITY_MODEL_TYPE_DB This is macro
SNMPV3_TRAP_SECURITY_MODEL_TYPE
_DB.
SNMPV3_TRAP_USER_SECURITY_NAME_DB This is macro
SNMPV3_TRAP_USER_SECURITY_NAME
_DB.
SNMPV3_USER_AUTH_PASSWD_DB This is macro
SNMPV3_USER_AUTH_PASSWD_DB.
SNMPV3_USER_AUTH_TYPE_DB This is macro
SNMPV3_USER_AUTH_TYPE_DB.
SNMPV3_USER_PRIV_PASSWD_DB This is macro
SNMPV3_USER_PRIV_PASSWD_DB.
SNMPV3_USER_PRIV_TYPE_DB This is macro
SNMPV3_USER_PRIV_TYPE_DB.
SNMPV3_USER_SECURITY_NAME_DB This is macro
SNMPV3_USER_SECURITY_NAME_DB.
SNMPV3_USER_SECURITY_NAME_LEN_MEM_USE User security name length for memory
validation
SNMPV3_USM_MAX_USER Client configuration options
TRAP_COMMUNITY_MAX_LEN Maximum length of community name table
TRAP_TABLE_SIZE This table maintains list of intereseted
receivers who should receive notifications
when some interesting event occurs.
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USER_SECURITY_NAME_LEN SNMPv3 User Security Name length
Structures
Name Description
SNMP_NET_CONFIG SNMP Network Configuration structure typedef
Description
The configuration of the SNMP TCP/IP Stack Library is based on the file tcpip_config.h
This header file contains the configuration selection for the SNMP TCP/IP Stack Library. Based on the selections made, the
SNMP TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all instances
of the SNMP TCP/IP Stack Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.22.5.1 AUTH_LOCALIZED_PASSWORD_KEY_LEN Macro
C
#define AUTH_LOCALIZED_PASSWORD_KEY_LEN (20)
Description
SNMPv3 Authentication Localized passwed key lenegth size
5.8.22.5.2 END_OF_SNMP_READ_COMMUNITIES Macro
C
#define END_OF_SNMP_READ_COMMUNITIES
Description
??
5.8.22.5.3 END_OF_SNMP_WRITE_COMMUNITIES Macro
C
#define END_OF_SNMP_WRITE_COMMUNITIES
Description
??
5.8.22.5.4 MY_DEFAULT_SNMP_IF Macro
C
#define MY_DEFAULT_SNMP_IF "PIC32INT"
Description
For multi-homed hosts, the default SNMP interface
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5.8.22.5.5 NOTIFY_COMMUNITY_LEN Macro
C
#define NOTIFY_COMMUNITY_LEN (SNMP_COMMUNITY_MAX_LEN)
Description
Length of Community name array
5.8.22.5.6 OID_MAX_LEN Macro
C
#define OID_MAX_LEN (18)
Description
Change this to match your OID string length.
5.8.22.5.7 PRIV_LOCALIZED_PASSWORD_KEY_LEN Macro
C
#define PRIV_LOCALIZED_PASSWORD_KEY_LEN (20)
Description
SNMPv3 Privacy Pasword key length size
5.8.22.5.8 SNMP_BIB_FILE_NAME Macro
C
#define SNMP_BIB_FILE_NAME "snmp.bib"
Description
Name of the bib file for snmp
5.8.22.5.9 SNMP_COMMUNITY_MAX_LEN Macro
C
#define SNMP_COMMUNITY_MAX_LEN (8u)
Description
This is the maximum length for community string. Application must ensure that this length is observed. SNMP module adds one
byte extra after SNMP_COMMUNITY_MAX_LEN for adding '0' NULL character.
5.8.22.5.10 SNMP_MAX_COMMUNITY_SUPPORT Macro
C
#define SNMP_MAX_COMMUNITY_SUPPORT (3u)
Description
Specifying more strings than SNMP_MAX_COMMUNITY_SUPPORT will result in the later strings being ignored (but still wasting
program memory). Specifying fewer strings is legal, as long as at least one is present.
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5.8.22.5.11 SNMP_MAX_MSG_SIZE Macro
C
#define SNMP_MAX_MSG_SIZE 484
Description
SNMP MIN and MAX message 484 bytes in size. As per RFC 3411 snmpEngineMaxMessageSize and RFC 1157 ( section 4-
protocol specification ) and implementation supports more than 484 whenever feasible.
5.8.22.5.12 SNMP_MAX_NON_REC_ID_OID Macro
C
#define SNMP_MAX_NON_REC_ID_OID 3
Description
Update the Non record id OID value which is part of CustomSnmpDemo.c file
5.8.22.5.13 SNMP_READ_COMMUNITIES Macro
C
#define SNMP_READ_COMMUNITIES {"public", "read", ""}
Description
Default SNMPv2C community names. These can be overridden at run time if alternate strings are present in external EEPROM
or Flash (actual strings coould be stored by the TCPIP storage service. These strings are case sensitive. An empty string means
disabled (not matchable). For application security, these default community names should not be used, but should all be
disabled to force the end user to select unique community names. These defaults are provided only to make it easier to start
development. Specifying more strings than SNMP_MAX_COMMUNITY_SUPPORT will result in the later strings being ignored
(but still wasting program memory). Specifying fewer strings is legal, as long as at least one is present. A string larger than
SNMP_COMMUNITY_MAX_LEN bytes will be ignored.
5.8.22.5.14 SNMP_TRAP_COMMUNITY_MAX_LEN_MEM_USE Macro
C
#define SNMP_TRAP_COMMUNITY_MAX_LEN_MEM_USE (8)
Description
This macro will be used to avoid SNMP OID memory buffer corruption
5.8.22.5.15 SNMP_WRITE_COMMUNITIES Macro
C
#define SNMP_WRITE_COMMUNITIES {"private", "write", "public"}
Description
Default SNMPv2C community names. See SNMP_READ_COMMUNITIES for more information.
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5.8.22.5.16 SNMPV3_AUTH_LOCALIZED_PASSWORD_KEY_LEN_MEM_USE
Macro
C
#define SNMPV3_AUTH_LOCALIZED_PASSWORD_KEY_LEN_MEM_USE (AUTH_LOCALIZED_PASSWORD_KEY_LEN+1)
Description
SNMPv3 authentication localized Key length for memory validation
5.8.22.5.17 SNMPV3_PRIV_LOCALIZED_PASSWORD_KEY_LEN_MEM_USE
Macro
C
#define SNMPV3_PRIV_LOCALIZED_PASSWORD_KEY_LEN_MEM_USE (PRIV_LOCALIZED_PASSWORD_KEY_LEN+1)
Description
SNMPv3 privacy key length size for memory validation
5.8.22.5.18 SNMPV3_TRAP_MSG_PROCESS_MODEL_DB Macro
C
#define SNMPV3_TRAP_MSG_PROCESS_MODEL_DB
{SNMPV3_MSG_PROCESSING_MODEL,SNMPV3_MSG_PROCESSING_MODEL,SNMPV3_MSG_PROCESSING_MODEL}
Description
This is macro SNMPV3_TRAP_MSG_PROCESS_MODEL_DB.
5.8.22.5.19 SNMPV3_TRAP_SECURITY_LEVEL_DB Macro
C
#define SNMPV3_TRAP_SECURITY_LEVEL_DB {AUTH_PRIV,AUTH_NO_PRIV,NO_AUTH_NO_PRIV}
Description
This is macro SNMPV3_TRAP_SECURITY_LEVEL_DB.
5.8.22.5.20 SNMPV3_TRAP_SECURITY_MODEL_TYPE_DB Macro
C
#define SNMPV3_TRAP_SECURITY_MODEL_TYPE_DB
{SNMPV3_USM_SECURITY_MODEL,SNMPV3_USM_SECURITY_MODEL,SNMPV3_USM_SECURITY_MODEL}
Description
This is macro SNMPV3_TRAP_SECURITY_MODEL_TYPE_DB.
5.8.22.5.21 SNMPV3_TRAP_USER_SECURITY_NAME_DB Macro
C
#define SNMPV3_TRAP_USER_SECURITY_NAME_DB {"microchip","SnmpAdmin","root"}
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Description
This is macro SNMPV3_TRAP_USER_SECURITY_NAME_DB.
5.8.22.5.22 SNMPV3_USER_AUTH_PASSWD_DB Macro
C
#define SNMPV3_USER_AUTH_PASSWD_DB {"auth12345","ChandlerUS",""}
Description
This is macro SNMPV3_USER_AUTH_PASSWD_DB.
5.8.22.5.23 SNMPV3_USER_AUTH_TYPE_DB Macro
C
#define SNMPV3_USER_AUTH_TYPE_DB {SNMPV3_HAMC_MD5,SNMPV3_HMAC_SHA1,SNMPV3_NO_HMAC_AUTH}
Description
This is macro SNMPV3_USER_AUTH_TYPE_DB.
5.8.22.5.24 SNMPV3_USER_PRIV_PASSWD_DB Macro
C
#define SNMPV3_USER_PRIV_PASSWD_DB {"priv12345","",""}
Description
This is macro SNMPV3_USER_PRIV_PASSWD_DB.
5.8.22.5.25 SNMPV3_USER_PRIV_TYPE_DB Macro
C
#define SNMPV3_USER_PRIV_TYPE_DB {SNMPV3_AES_PRIV,SNMPV3_NO_PRIV,SNMPV3_NO_PRIV}
Description
This is macro SNMPV3_USER_PRIV_TYPE_DB.
5.8.22.5.26 SNMPV3_USER_SECURITY_NAME_DB Macro
C
#define SNMPV3_USER_SECURITY_NAME_DB {"microchip","SnmpAdmin","root"}
Description
This is macro SNMPV3_USER_SECURITY_NAME_DB.
5.8.22.5.27 SNMPV3_USER_SECURITY_NAME_LEN_MEM_USE Macro
C
#define SNMPV3_USER_SECURITY_NAME_LEN_MEM_USE (USER_SECURITY_NAME_LEN+1)
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Description
User security name length for memory validation
5.8.22.5.28 SNMPV3_USM_MAX_USER Macro
C
#define SNMPV3_USM_MAX_USER 3
Description
Client configuration options
5.8.22.5.29 TRAP_COMMUNITY_MAX_LEN Macro
C
#define TRAP_COMMUNITY_MAX_LEN (SNMP_TRAP_COMMUNITY_MAX_LEN_MEM_USE+1)
Description
Maximum length of community name table
5.8.22.5.30 TRAP_TABLE_SIZE Macro
C
#define TRAP_TABLE_SIZE (2)
Description
This table maintains list of intereseted receivers who should receive notifications when some interesting event occurs.
5.8.22.5.31 USER_SECURITY_NAME_LEN Macro
C
#define USER_SECURITY_NAME_LEN (16)
Description
SNMPv3 User Security Name length
5.8.22.5.32 SNMP_NET_CONFIG Structure
C
typedef struct {
uint8_t readCommunity[SNMP_MAX_COMMUNITY_SUPPORT][SNMP_COMMUNITY_MAX_LEN+1];
uint8_t writeCommunity[SNMP_MAX_COMMUNITY_SUPPORT][SNMP_COMMUNITY_MAX_LEN+1];
uint32_t SnmpEngineBootRcrd;
} SNMP_NET_CONFIG;
Description
SNMP Network Configuration structure typedef
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Members
Members Description
uint8_t
readCommunity[SNMP_MAX_COMMUNITY_SUPPORT][SNMP_COMMUNITY_MAX_LEN+1];
SNMPv2C Read community
names
SNMP_COMMUNITY_MAX_LE
N
(8) + 1 null termination byte
uint8_t
writeCommunity[SNMP_MAX_COMMUNITY_SUPPORT][SNMP_COMMUNITY_MAX_LEN+1];
SNMPv2C Write community
names
SNMP_COMMUNITY_MAX_LE
N
(8) + 1 null termination byte
uint32_t SnmpEngineBootRcrd; SNMP Engine Boot Record
location
5.8.22.6 Building the Library
This section list the files that are available in the \src of the SNMP driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.8.22.7 Library Interface
SNMP Application Functions
Name Description
SNMPGetExactIndex To search for exact index node in case of a Sequence variable.
SNMPGetNextIndex To search for next index node in case of a Sequence variable.
SNMPGetVar Used to Get/collect OID variable information.
SNMPIsValidSetLen Validates the set variable data length to data type.
SNMPSendTrap Prepare, validate remote node which will receive trap and send trap pdu.
SNMPSetVar This routine Set the mib variable with the requested value.
SNMPValidateCommunity Validates community name for access control.
SNMP Data Types and Constants
Name Description
SNMP_END_OF_VAR This is macro SNMP_END_OF_VAR.
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SNMP_H FileName: SNMP.h Copyright © 2012 released Microchip
Technology Inc. All rights reserved.
Microchip licenses to you the right to use, modify, copy and
distribute Software only when embedded on a Microchip
microcontroller or digital signal controller that is integrated
into your product or third party product (pursuant to the
sublicense terms in the accompanying license agreement).
You should refer to the license agreement accompanying
this Software for additional information regarding your rights
and obligations.
SOFTWARE AND DOCUMENTATION ARE PROVIDED “AS
IS” WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESS OR IMPLIED, INCLUDING WITHOUT
LIMITATION, ANY WARRANTY OF MERCHANTABILITY,
TITLE, NON-INFRINGEMENT AND... more
SNMP_INDEX_INVALID This is macro SNMP_INDEX_INVALID.
SNMP_START_OF_VAR
SNMP_V1
SNMP_V2C This is macro SNMP_V2C.
SNMP_V3 This is macro SNMP_V3.
GENERIC_TRAP_NOTIFICATION_TYPE This is type GENERIC_TRAP_NOTIFICATION_TYPE.
IPV6_SNMP_TRAP_INFO This is type IPV6_SNMP_TRAP_INFO.
SNMP_BUFFER_DATA SNMPv1/v2c
SNMP_COMMUNITY_TYPE This is type SNMP_COMMUNITY_TYPE.
SNMP_ID This is the SNMP OID variable id. This id is assigned via
MIB file. Only dynamic and AgentID variables can contian
ID. MIB2BIB utility enforces this rules when BIB was
generated. typedef int SNMP_ID;
SNMP_INDEX This is type SNMP_INDEX.
SNMP_MODULE_CONFIG This is type SNMP_MODULE_CONFIG.
SNMP_NON_MIB_RECD_INFO This is type SNMP_NON_MIB_RECD_INFO.
SNMP_NOTIFY_INFO // the only if that runs SNMP
SNMP_PROCESSING_MEM_INFO_PTRS This is type SNMP_PROCESSING_MEM_INFO_PTRS.
SNMP_STACK_DCPT_STUB
SNMP_TRAP_INFO This is type SNMP_TRAP_INFO.
SNMP_TRAP_IP_ADDRESS_TYPE This is type SNMP_TRAP_IP_ADDRESS_TYPE.
SNMP_VAL This is type SNMP_VAL.
TCPIP_SNMP_DCPT TCPIP_STACK_USE_IPV6
TCPIP_SNMP_SM This is type TCPIP_SNMP_SM.
VENDOR_SPECIFIC_TRAP_NOTIFICATION_TYPE This is type
VENDOR_SPECIFIC_TRAP_NOTIFICATION_TYPE.
tIPV6_SNMP_TRAP_INFO This is type IPV6_SNMP_TRAP_INFO.
tSNMP_TRAP_INFO This is type SNMP_TRAP_INFO.
SNMP Module Functions
Name Description
TCPIP_SNMP_ClientGetNet
TCPIP_SNMP_DataCopyToProcessBuffer Copies uint8_t data to dynamically allocated memory buffer.
TCPIP_SNMP_EventNotifyGet To Get the IPv6 DHCP event notification.
TCPIP_SNMP_Notify Creates and Sends TRAP pdu.
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TCPIP_SNMP_NotifyIsReady Resolves given remoteHost IP address into MAC address.
TCPIP_SNMP_NotifyPrepare Collects trap notification info and send ARP to remote host.
TCPIP_SNMP_PacketProcStubPtrsGet Get SNMP packet processing memory pointer.
TCPIP_SNMP_ProcessBufferDataGet Reads uint8_t data from dynamically allocated memory buffer.
TCPIP_SNMP_ReadCommunityGet Get the readCommunity String with Snmp index.
TCPIP_SNMP_TrapTimeGet Get SNMP Trap UDP client open socket timeout.
TCPIP_SNMP_WriteCommunityGet Get the writeCommunity String with Snmp index.
SNMPv3 Application Functions
Name Description
SNMPv3ComputeHMACIpadOpadForAuthLoclzedKey Compute HMAC inner and outer pad for
authorization localized key.
SNMPv3USMAuthPrivPswdLocalization Convert Auth and Priv password to the localized
Key using SNMPEngineID.
TCPIP_SNMPv3_CmprTrapSecNameAndSecLvlWithUSMDb Routine to find the index of the user name in the
user data base table.
SNMPv3 Data Types and Constants
Name Description
SNMPV3_PROCESSING_MEM_INFO_PTRS SNMPv3 Processing Memory Pointers
SNMPV3_STACK_DCPT_STUB SNMPv3 Descriptor Structure Typedef
SNMPv3 Module Functions
Name Description
TCPIP_SNMPv3_Notify Creates and Sends SNMPv3 TRAP pdu.
TCPIP_SNMPV3_PacketProcStubPtrsGet Get SNMPv3 packet processing memory pointer.
Description
This section describes the Application Programming Interface (API) functions of the SNMP TCP/IP Stack.
Refer to each section for a detailed description.
5.8.22.7.1 SNMP Module Functions
5.8.22.7.1.1 TCPIP_SNMP_ClientGetNet Function
C
TCPIP_NET_HANDLE TCPIP_SNMP_ClientGetNet();
5.8.22.7.1.2 TCPIP_SNMP_DataCopyToProcessBuffer Function
C
bool TCPIP_SNMP_DataCopyToProcessBuffer(
uint8_t val,
SNMP_BUFFER_DATA * putbuf
);
Description
The SNMPv1 and v2c stack implementation uses dynamically allocated memory buffer for processing of request and response
packets. This routine copies the uint8_t data to the allocated buffer and updates the offset length couter.
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Preconditions
The SNMPv1 and v2c stack has sucessfully allocated dynamic memory buffer from the Heap
Parameters
Parameters Description
val uint8_t value to be written to the buffer
putbuf pointer to the dynamically allocated buffer to which the 'val' to be written
Return Values
Return Values Description
true if successfully write to the buffer
false failure in writing to the buffer
Remarks
This routine is used by the SNMP stack. If required to be used by the application code, valid pointers should be passed to this
routine.
5.8.22.7.1.3 TCPIP_SNMP_EventNotifyGet Function
C
IPV6_EVENT_TYPE TCPIP_SNMP_EventNotifyGet(
TCPIP_NET_HANDLE hNet
);
Description
This rutine is used to get the DHCP with IPv6 notication if the IPv6 unicast address is updated.
Preconditions
TCPIP_SNMP_Initialize() is called.
Parameters
Parameters Description
hNet Interface
Remarks
None.
5.8.22.7.1.4 TCPIP_SNMP_Notify Function
C
bool TCPIP_SNMP_Notify(
SNMP_ID var,
SNMP_VAL val,
SNMP_INDEX index
);
Description
This function creates SNMP V2 Trap PDU and sends it to previously specified remoteHost.
SNMP V1 trap pdu: | PDU-type | enterprise | agent-addr | generic-trap | specific-trap | | time-stamp | varbind-list |
The v1 enterprise is mapped directly to SNMPv2TrapOID.0
SNMP V2 trap pdu: version (0 or 1) | community | SNMP-PDU |pdu-type | request-id | error-status |err-index |varbinds
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The first two variables (in varbind-list) of snmpv2 are: sysUpTime.0 and SNMPv2TrapOID.0
Generic Trap OID is used as the varbind for authentication failure.
Preconditions
TCPIP_SNMP_NotifyIsReady() is already called and returned true.
Parameters
Parameters Description
var SNMP var ID that is to be used in notification
val Value of var. Only value of uint8_t, uint16_t or uint32_t can be sent.
index Index of var. If this var is a single,index would be 0, or else if this var Is a
sequence, index could be any value from 0 to 127
Return Values
Return Values Description
true if SNMP notification was successful sent. This does not guarantee that
remoteHost recieved it.
false Notification sent failed.
This would fail under following contions 1) Given SNMP_BIB_FILE does not exist in file system 2) Given var does not
exist. 3) Previously given agentID does not exist
4) Data type of given var is unknown possible if file system itself was corrupted.
Remarks
This would fail if there were not UDP socket to open.
5.8.22.7.1.5 TCPIP_SNMP_NotifyIsReady Function
C
bool TCPIP_SNMP_NotifyIsReady(
IP_MULTI_ADDRESS* remoteHost,
SNMP_TRAP_IP_ADDRESS_TYPE eTrapMultiAddressType
);
Description
This function resolves given remoteHost IP address into MAC address using ARP module. If remoteHost is not aviailable, this
function would never return true. Application must implement timeout logic to handle "remoteHost not avialable" situation.
Preconditions
TCPIP_SNMP_NotifyPrepare() is already called.
Parameters
Parameters Description
remoteHost Pointer to remote Host IP address
Return Values
Return Values Description
true If remoteHost IP address is resolved and TCPIP_SNMP_Notify may be called.
false If remoteHost IP address is not resolved.
Remarks
This would fail if there were not UDP socket to open.
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5.8.22.7.1.6 TCPIP_SNMP_NotifyPrepare Function
C
void TCPIP_SNMP_NotifyPrepare(
IP_MULTI_ADDRESS* remoteHost,
char* community,
uint8_t communityLen,
SNMP_ID agentIDVar,
uint8_t notificationCode,
uint32_t timestamp
);
Description
This function prepares SNMP module to send SNMP trap notification to remote host. It sends ARP request to remote host to
learn remote host MAC address.
Preconditions
TCPIP_SNMP_Initialize() is already called.
Parameters
Parameters Description
remoteHost pointer to remote Host IP address
community Community string to use to notify
communityLen Community string length
agentIDVar System ID to use identify this agent
notificaitonCode Notification Code to use
timestamp Notification timestamp in 100th of second.
Returns
None
Remarks
This is first of series of functions to complete SNMP notification.
5.8.22.7.1.7 TCPIP_SNMP_PacketProcStubPtrsGet Function
C
void TCPIP_SNMP_PacketProcStubPtrsGet(
SNMP_PROCESSING_MEM_INFO_PTRS * dynMemInfoPtr
);
Description
This function is used to get dynamic memory allocation pointer details which is used for SNMP packet processing.
Preconditions
TCPIP_SNMP_Initialize() is already called.
Parameters
Parameters Description
dynMemInfoPtr Dynamic memory pointer for packet processing
Remarks
None.
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5.8.22.7.1.8 TCPIP_SNMP_ProcessBufferDataGet Function
C
uint8_t TCPIP_SNMP_ProcessBufferDataGet(
SNMP_BUFFER_DATA getbuf,
uint16_t pos
);
Description
The SNMPstack implementation uses dynamically allocated memory buffer for processing of request and response packets. This
routine reads the uint8_t data from the allocated buffer at the positions (offset) provided.
Preconditions
The SNMPv1 and v2c stack has sucessfully allocated dynamic memory buffer from the Heap
Parameters
Parameters Description
getbuf Structure from where to read the data byte.
pos position in the buffer from which the data to be read
Return Values
Return Values Description
uint8_t 1 byte value read
Remarks
The read position offset is required to be provided every time the routine is called. This API do not increment the buffer read
offset automatically, everytime it is called.
5.8.22.7.1.9 TCPIP_SNMP_ReadCommunityGet Function
C
uint8_t* TCPIP_SNMP_ReadCommunityGet(
int index
);
Description
Get the readCommunity String with Snmp index.
Preconditions
_SNMP_ProcessVariables() is called.
Parameters
Parameters Description
index SNMP_MAX_COMMUNITY_SUPPORT.
Return Values
Return Values Description
uint8_t * unsigned char community string
Remarks
None.
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5.8.22.7.1.10 TCPIP_SNMP_TrapTimeGet Function
C
SYS_TICK TCPIP_SNMP_TrapTimeGet();
Description
This function returns a SYS_TICK time(snmpTrapTimer) which is used to timeout a SNMP TRAP notification for a HOST.
snmpTrapTimer is initialized when there is UDP client socket open either for a HOST IPv4 or IPv6 address.
Preconditions
TCPIP_SNMP_Initialize() is already called.
Remarks
None.
5.8.22.7.1.11 TCPIP_SNMP_WriteCommunityGet Function
C
uint8_t* TCPIP_SNMP_WriteCommunityGet(
int index
);
Description
Get the writeCommunity String with Snmp index.
Preconditions
_SNMP_ProcessVariables() is called.
Parameters
Parameters Description
index SNMP_MAX_COMMUNITY_SUPPORT.
Return Values
Return Values Description
uint8_t * unsigned char community string
Remarks
None.
5.8.22.7.2 SNMPv3 Module Functions
5.8.22.7.2.1 TCPIP_SNMPv3_Notify Function
C
bool TCPIP_SNMPv3_Notify(
SNMP_ID var,
SNMP_VAL val,
SNMP_INDEX index,
uint8_t targetIndex
);
Description
This function creates SNMPv3 trap PDU and sends it to previously specified remoteHost.
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Preconditions
TRAP event is triggered.
Parameters
Parameters Description
var SNMP var ID that is to be used in notification
val Value of var. Only value of uint8_t, uint16_t or uint32_t can be sent.
index Index of var. If this var is a single,index would be 0, or else if this var Is a
sequence, index could be any value from 0 to 127 targetIndex -index of the
'Snmpv3TrapConfigData' table's security user name for which the TRAP PDU
message header to constructed.
Return Values
Return Values Description
true if SNMP notification was successful sent. This does not guarantee that
remoteHost recieved it.
false Notification sent failed.
This would fail under following contions 1) Given SNMP_BIB_FILE does not exist in file system 2) Given var does not
exist. 3) Previously given agentID does not exist
4) Data type of given var is unknown only possible if file system itself was corrupted. SNMPV3_MSG_PRIV_FAIL
-encryption of the trap msg failed
SNMPV3_MSG_AUTH_FAIL HAMC of the trap msg failed
Remarks
None
5.8.22.7.2.2 TCPIP_SNMPV3_PacketProcStubPtrsGet Function
C
void TCPIP_SNMPV3_PacketProcStubPtrsGet(
SNMPV3_PROCESSING_MEM_INFO_PTRS * dynMemInfoPtr
);
Description
This function is used to get dynamic memory allocation pointer details which is used for SNMPv3 packet processing.
Preconditions
TCPIP_SNMP_Initialize() is already called.
Parameters
Parameters Description
dynMemInfoPtr Dynamic memory pointer for packet processing
Remarks
The source code for this routine is found in snmp.c, not snmpv3.c.
5.8.22.7.3 SNMP Application Functions
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5.8.22.7.3.1 SNMPGetExactIndex Function
C
bool SNMPGetExactIndex(
SNMP_ID var,
SNMP_INDEX * index
);
Description
This is a callback function called by SNMP module. SNMP user must implement this function in user application and provide
appropriate data when called. This function will only be called for OID variable of type sequence.
Preconditions
None
Parameters
Parameters Description
var Variable id as per mib.h (input)
index Index of variable (input)
Return Values
Return Values Description
true If the exact index value exists for given variable at given index.
false Otherwise.
Remarks
Only sequence index needs to be handled in this function.
5.8.22.7.3.2 SNMPGetNextIndex Function
C
bool SNMPGetNextIndex(
SNMP_ID var,
SNMP_INDEX* index
);
Description
This is a callback function called by SNMP module. SNMP user must implement this function in user application and provide
appropriate data when called. This function will only be called for OID variable of type sequence.
Preconditions
None
Parameters
Parameters Description
var Variable id whose value is to be returned
index Next Index of variable that should be transferred
Return Values
Return Values Description
true If a next index value exists for given variable at given index and index parameter
contains next valid index.
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false Otherwise.
Remarks
Only sequence index needs to be handled in this function.
5.8.22.7.3.3 SNMPGetVar Function
C
bool SNMPGetVar(
SNMP_ID var,
SNMP_INDEX index,
uint8_t* ref,
SNMP_VAL* val
);
Description
This is a callback function called by SNMP module. SNMP user must implement this function in user application and provide
appropriate data when called.
Preconditions
None
Parameters
Parameters Description
var Variable id whose value is to be returned
index Index of variable that should be transferred
ref Variable reference used to transfer multi-byte data It is always
SNMP_START_OF_VAR when very first byte is requested. Otherwise, use this as
a reference to keep track of multi-byte transfers.
val Pointer to up to 4 byte buffer. If var data type is uint8_t, transfer data in val->byte If
var data type is uint16_t, transfer data in val->word If var data type is uint32_t,
transfer data in val->dword If var data type is IP_ADDRESS, transfer data in
val->v[] or val->dword If var data type is COUNTER32, TIME_TICKS or
GAUGE32, transfer data in val->dword If var data type is ASCII_STRING or
OCTET_STRING transfer data in val->byte using multi-byte transfer mechanism.
Return Values
Return Values Description
true If a value exists for given variable at given index.
false Otherwise.
Remarks
None.
5.8.22.7.3.4 SNMPIsValidSetLen Function
C
bool SNMPIsValidSetLen(
SNMP_ID var,
uint8_t len,
uint8_t index
);
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Description
This routine is used to validate the dyanmic variable data length to the variable data type. It is used when SET request is
processed. This is a callback function called by module. User application must implement this function.
Preconditions
TCPIP_SNMP_ProcessSetVar() is called.
Parameters
Parameters Description
var Variable id whose value is to be set
len Length value that is to be validated.
Return Values
Return Values Description
true if given var can be set to given len
false if otherwise.
Remarks
This function will be called for only dynamic variables that are defined as ASCII_STRING and OCTET_STRING (i.e. data length
greater than 4 bytes)
5.8.22.7.3.5 SNMPSendTrap Function
C
void SNMPSendTrap();
Description
This function is used to send trap notification to previously configured ip address if trap notification is enabled. There are different
trap notification code. The current implementation sends trap for authentication failure (4).
Preconditions
If application defined event occurs to send the trap.
Returns
None.
Remarks
This is a callback function called by the application on certain predefined events. This routine only implemented to send a
authentication failure Notification-type macro with PUSH_BUTTON oid stored in MPFS. If the ARP is no resolved i.e. if
TCPIP_SNMP_NotifyIsReady() returns false, this routine times out in 5 seconds. This routine should be modified according to
event occured and should update corrsponding OID and notification type to the trap pdu.
5.8.22.7.3.6 SNMPSetVar Function
C
bool SNMPSetVar(
SNMP_ID var,
SNMP_INDEX index,
uint8_t ref,
SNMP_VAL val
);
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Description
This is a callback function called by module for the snmp SET request.User application must modify this function for the new
variables address.
Preconditions
TCPIP_SNMP_ProcessVariables() is called.
Parameters
Parameters Description
var Variable id whose value is to be set
ref Variable reference used to transfer multi-byte data 0 if first byte is set otherwise
nonzero value to indicate corresponding byte being set.
val Up to 4 byte data value. If var data type is uint8_t, variable value is in val->byte If
var data type is uint16_t, variable value is in val->word If var data type is uint32_t,
variable value is in val->dword. If var data type is IP_ADDRESS, COUNTER32, or
GAUGE32, value is in val->dword If var data type is OCTET_STRING,
ASCII_STRING value is in val->byte; multi-byte transfer will be performed to
transfer remaining bytes of data.
Return Values
Return Values Description
true if it is OK to set more byte(s).
false if otherwise.
Remarks
This function may get called more than once depending on number of bytes in a specific set request for given variable. only
dynamic read-write variables needs to be handled.
5.8.22.7.3.7 SNMPValidateCommunity Function
C
uint8_t SNMPValidateCommunity(
uint8_t* community
);
Description
This function validates the community name for the mib access to NMS. The snmp community name received in the request pdu
is validated for read and write community names. The agent gives an access to the mib variables only if the community matches
with the predefined values. This routine also sets a gloabal flag to send trap if authentication failure occurs.
Preconditions
TCPIP_SNMP_Initialize is already called.
Parameters
Parameters Description
community Pointer to community string as sent by NMS.
Returns
This routine returns the community validation result as READ_COMMUNITY or WRITE_COMMUNITY or INVALID_COMMUNITY
Remarks
This is a callback function called by module. User application must implement this function and verify that community matches
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with predefined value. This validation occurs for each NMS request.
5.8.22.7.4 SNMPv3 Application Functions
5.8.22.7.4.1 SNMPv3ComputeHMACIpadOpadForAuthLoclzedKey Function
C
void SNMPv3ComputeHMACIpadOpadForAuthLoclzedKey(
uint8_t userDBIndex
);
Description
This routine computes HMAC inner and outer pad strings for authorization localized key. RFC - 2104.
Preconditions
TCPIP_SNMPv3_Initialize() and ProcessVariabels() are called.
Parameters
Parameters Description
userDBIndex password storage poniter
Remarks
None
5.8.22.7.4.2 SNMPv3USMAuthPrivPswdLocalization Function
C
void SNMPv3USMAuthPrivPswdLocalization(
uint8_t userDBIndex
);
Description
This routine converts MD5 or SHA1 and AES privacy password key to localized key using snmpSngineID(RFC- 3414 - section 6).
Preconditions
TCPIP_SNMPv3_Initialize() and ProcessVariabels() are called.
Parameters
Parameters Description
userDBIndex authentication protocol type
Remarks
None
5.8.22.7.4.3 TCPIP_SNMPv3_CmprTrapSecNameAndSecLvlWithUSMDb Function
C
bool TCPIP_SNMPv3_CmprTrapSecNameAndSecLvlWithUSMDb(
uint8_t tragetIndex,
uint8_t userTrapSecLen,
uint8_t * userTrapSecurityName,
STD_BASED_SNMPV3_SECURITY_LEVEL securityLevel
);
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Description
There are two different data base tables defined with SNMPv3 stack, like 'UserInfoDataBase' and 'Snmpv3TrapConfigData'. This
routine is used to validte the trap user security level setting with SET request.
Preconditions
SET operation would be allowed if the USM security conditions and user security name in the request is matched to one of the
user security name stored in the usm user database.
Parameters
Parameters Description
userTrapSecLen user sec name length in the SET request
userTrapSecurityName pointer to user sec name in the SET request
securityLevel trap security level to be SET on the agent
Return Values
Return Values Description
true if the trap target user sec level setting is successful
FLASE If the SET failed due to non matching of the security parameters
Remarks
None.
5.8.22.7.5 SNMP Data Types and Constants
5.8.22.7.5.1 SNMP_END_OF_VAR Macro
C
#define SNMP_END_OF_VAR (0xff)
Description
This is macro SNMP_END_OF_VAR.
5.8.22.7.5.2 SNMP_H Macro
C
#define SNMP_H
Description
FileName: SNMP.h Copyright © 2012 released Microchip Technology Inc. All rights reserved.
Microchip licenses to you the right to use, modify, copy and distribute Software only when embedded on a Microchip
microcontroller or digital signal controller that is integrated into your product or third party product (pursuant to the sublicense
terms in the accompanying license agreement).
You should refer to the license agreement accompanying this Software for additional information regarding your rights and
obligations.
SOFTWARE AND DOCUMENTATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT
AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR
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OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES INCLUDING BUT NOT
LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR
LOST DATA, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY
THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.
5.8.22.7.5.3 SNMP_INDEX_INVALID Macro
C
#define SNMP_INDEX_INVALID (0xff)
Description
This is macro SNMP_INDEX_INVALID.
5.8.22.7.5.4 SNMP_START_OF_VAR Macro
C
#define SNMP_START_OF_VAR (0)
5.8.22.7.5.5 SNMP_V1 Macro
C
#define SNMP_V1 (0)
5.8.22.7.5.6 SNMP_V2C Macro
C
#define SNMP_V2C (1)
Description
This is macro SNMP_V2C.
5.8.22.7.5.7 SNMP_V3 Macro
C
#define SNMP_V3 (3)
Description
This is macro SNMP_V3.
5.8.22.7.5.8 GENERIC_TRAP_NOTIFICATION_TYPE Enumeration
C
typedef enum {
COLD_START = 0x0,
WARM_START = 0x1,
LINK_DOWN = 0x2,
LINK_UP = 0x3,
AUTH_FAILURE = 0x4,
EGP_NEBOR_LOSS = 0x5,
ENTERPRISE_SPECIFIC = 0x6
} GENERIC_TRAP_NOTIFICATION_TYPE;
Description
This is type GENERIC_TRAP_NOTIFICATION_TYPE.
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5.8.22.7.5.9 IPV6_SNMP_TRAP_INFO Structure
C
typedef struct tIPV6_SNMP_TRAP_INFO {
uint8_t Size;
struct {
uint8_t communityLen;
char community[TRAP_COMMUNITY_MAX_LEN];
IPV6_ADDR IPv6Address;
struct {
unsigned int bEnabled : 1;
} Flags;
} table[TRAP_TABLE_SIZE];
} IPV6_SNMP_TRAP_INFO;
Description
This is type IPV6_SNMP_TRAP_INFO.
Members
Members Description
uint8_t communityLen; Community name length
char
community[TRAP_COMMUNITY_MAX_LEN];
Community name array
IPV6_ADDR IPv6Address; IPv6 address to which trap to be sent
unsigned int bEnabled : 1; Trap enabled flag
5.8.22.7.5.10 SNMP_BUFFER_DATA Structure
C
typedef struct {
uint8_t * head;
uint16_t length;
} SNMP_BUFFER_DATA;
Description
SNMPv1/v2c
5.8.22.7.5.11 SNMP_COMMUNITY_TYPE Enumeration
C
typedef enum {
READ_COMMUNITY = 1,
WRITE_COMMUNITY = 2,
INVALID_COMMUNITY = 3
} SNMP_COMMUNITY_TYPE;
Description
This is type SNMP_COMMUNITY_TYPE.
Members
Members Description
READ_COMMUNITY = 1 Read only community
WRITE_COMMUNITY = 2 Read write community
INVALID_COMMUNITY = 3 Community invalid
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5.8.22.7.5.12 SNMP_ID Type
C
typedef uint32_t SNMP_ID;
Description
This is the SNMP OID variable id. This id is assigned via MIB file. Only dynamic and AgentID variables can contian ID. MIB2BIB
utility enforces this rules when BIB was generated. typedef int SNMP_ID;
5.8.22.7.5.13 SNMP_INDEX Type
C
typedef uint8_t SNMP_INDEX;
Description
This is type SNMP_INDEX.
5.8.22.7.5.14 SNMP_MODULE_CONFIG Structure
C
typedef struct {
} SNMP_MODULE_CONFIG;
Description
This is type SNMP_MODULE_CONFIG.
5.8.22.7.5.15 SNMP_NON_MIB_RECD_INFO Structure
C
typedef struct {
uint8_t oidstr[16];
uint8_t version;
} SNMP_NON_MIB_RECD_INFO;
Description
This is type SNMP_NON_MIB_RECD_INFO.
5.8.22.7.5.16 SNMP_NOTIFY_INFO Structure
C
typedef struct {
char community[NOTIFY_COMMUNITY_LEN];
uint8_t communityLen;
SNMP_ID agentIDVar;
uint8_t notificationCode;
UDP_SOCKET socket;
TCPIP_UINT32_VAL timestamp;
SNMP_ID trapIDVar;
TCPIP_NET_HANDLE snmpTrapInf;
} SNMP_NOTIFY_INFO;
Description
// the only if that runs SNMP
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Members
Members Description
char
community[NOTIFY_COMMUNITY_LEN];
Community name array
uint8_t communityLen; Community name length
SNMP_ID agentIDVar; Agent id for trap identification
uint8_t notificationCode; Trap notification code
UDP_SOCKET socket; Udp socket number
TCPIP_UINT32_VAL timestamp; Time stamp for trap
SNMP_ID trapIDVar; SNMPV2 specific trap
TCPIP_NET_HANDLE snmpTrapInf; interface we use for the SNMP TRAP
5.8.22.7.5.17 SNMP_PROCESSING_MEM_INFO_PTRS Structure
C
typedef struct {
SNMP_STACK_DCPT_STUB* snmpStkDynMemStubPtr;
const void* snmpHeapMemHandler;
TCPIP_SNMP_DCPT* snmpDcptPtr;
} SNMP_PROCESSING_MEM_INFO_PTRS;
Description
This is type SNMP_PROCESSING_MEM_INFO_PTRS.
5.8.22.7.5.18 SNMP_STACK_DCPT_STUB Structure
C
typedef struct {
uint8_t gOIDCorrespondingSnmpMibID;
uint8_t gSetTrapSendFlag;
bool getZeroInstance;
uint8_t appendZeroToOID;
uint8_t gSendTrapFlag;
uint8_t gGenericTrapNotification;
uint8_t gSpecificTrapNotification;
SNMP_NOTIFY_INFO SNMPNotifyInfo;
SNMP_BUFFER_DATA outPduBufData;
SNMP_BUFFER_DATA trapPduOutBufData;
SNMP_NET_CONFIG snmpNetConfig;
} SNMP_STACK_DCPT_STUB;
Members
Members Description
SNMP_NOTIFY_INFO SNMPNotifyInfo; notify info for trap
5.8.22.7.5.19 SNMP_TRAP_INFO Structure
C
typedef struct tSNMP_TRAP_INFO {
uint8_t Size;
struct {
uint8_t communityLen;
char community[TRAP_COMMUNITY_MAX_LEN];
IPV4_ADDR IPAddress;
struct {
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unsigned int bEnabled : 1;
} Flags;
} table[TRAP_TABLE_SIZE];
} SNMP_TRAP_INFO;
Description
This is type SNMP_TRAP_INFO.
Members
Members Description
uint8_t communityLen; Community name length
char
community[TRAP_COMMUNITY_MAX_LEN];
Community name array
IPV4_ADDR IPAddress; IP address to which trap to be sent
unsigned int bEnabled : 1; Trap enabled flag
5.8.22.7.5.20 SNMP_TRAP_IP_ADDRESS_TYPE Enumeration
C
typedef enum {
IPV4_SNMP_TRAP = 1,
IPV6_SNMP_TRAP
} SNMP_TRAP_IP_ADDRESS_TYPE;
Description
This is type SNMP_TRAP_IP_ADDRESS_TYPE.
5.8.22.7.5.21 SNMP_VAL Union
C
typedef union {
uint32_t dword;
uint16_t word;
uint8_t byte;
uint8_t v[sizeof(uint32_t)];
} SNMP_VAL;
Description
This is type SNMP_VAL.
Members
Members Description
uint32_t dword; double word value
uint16_t word; word value
uint8_t byte; byte value
uint8_t v[sizeof(uint32_t)]; byte array
5.8.22.7.5.22 TCPIP_SNMP_DCPT Structure
C
typedef struct {
TCPIP_SNMP_SM sm;
UDP_SOCKET skt;
bool readFromSnmpBuf;
IPV6_HANDLE snmpIPV6Handler;
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IPV6_EVENT_TYPE ipv6EventType;
} TCPIP_SNMP_DCPT;
Description
TCPIP_STACK_USE_IPV6
Members
Members Description
TCPIP_SNMP_SM sm; current status
UDP_SOCKET skt; associated socket
5.8.22.7.5.23 TCPIP_SNMP_SM Enumeration
C
typedef enum {
SNMP_HOME = 0,
SNMP_LISTEN,
SNMP_PROCESS,
SNMP_PACKET_DISCARD
} TCPIP_SNMP_SM;
Description
This is type TCPIP_SNMP_SM.
5.8.22.7.5.24 VENDOR_SPECIFIC_TRAP_NOTIFICATION_TYPE Enumeration
C
typedef enum {
VENDOR_TRAP_DEFAULT = 0x0,
BUTTON_PUSH_EVENT = 0x1,
POT_READING_MORE_512 = 0x2
} VENDOR_SPECIFIC_TRAP_NOTIFICATION_TYPE;
Description
This is type VENDOR_SPECIFIC_TRAP_NOTIFICATION_TYPE.
5.8.22.7.6 SNMPv3 Data Types and Constants
5.8.22.7.6.1 SNMPV3_PROCESSING_MEM_INFO_PTRS Structure
C
typedef struct {
SNMPV3_STACK_DCPT_STUB * snmpv3StkProcessingDynMemStubPtr;
const void* snmpHeapMemHandler;
} SNMPV3_PROCESSING_MEM_INFO_PTRS;
Description
SNMPv3 Processing Memory Pointers
5.8.22.7.6.2 SNMPV3_STACK_DCPT_STUB Structure
C
typedef struct {
uint16_t UserInfoDataBaseIndx;
uint8_t SnmpEngineID[32];
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uint8_t SnmpEngnIDLength;
uint16_t SnmpMsgBufSeekPos;
uint16_t ScopedPduDataPos;
uint32_t SnmpEngineTimeOffset;
uint32_t SnmpEngineBoots;
TCPIP_UINT16_VAL UsmStatsEngineID;
TCPIP_UINT32_VAL AuthoritativeSnmpEngineBoots;
TCPIP_UINT32_VAL AuthoritativeSnmpEngnTime;
TCPIP_UINT32_VAL IncmngSnmpPduMsgID;
TCPIP_UINT32_VAL SnmpEngineTime;
TCPIP_UINT32_VAL SnmpEngnMaxMsgSize;
SNMPV3_REQUEST_WHOLEMSG InPduWholeMsgBuf;
SNMPV3_RESPONSE_WHOLEMSG OUTPduWholeMsgBuf;
SNMPV3_RESPONSE_WHOLEMSG TrapOUTPduWholeMsgBuf;
snmpV3TrapConfigDataBase Snmpv3TrapConfigData[SNMPV3_USM_MAX_USER];
SNMPV3MSGDATA ScopedPduRequstBuf;
SNMPV3MSGDATA ScopedPduRespnsBuf;
SNMPV3MSGDATA PduHeaderBuf;
SNMPV3MSGDATA TrapMsgHeaderBuf;
SNMPV3MSGDATA TrapScopdPduRespnsBuf;
dispatcherProcessPdu incomingPdu;
uint8_t SnmpSecurityLevel;
uint8_t SnmpRespnsSecrtyFlg;
uint8_t SnmpInMsgAuthParmStrng[12+1];
uint8_t SnmpInMsgAuthParamLen;
uint8_t snmpInMsgPrvParamStrng[8+1];
uint8_t SnmpInMsgPrivParmLen;
uint8_t SnmpOutMsgAuthParaStrng[12+1];
uint8_t SnmpOutMsgAuthParmLen;
uint8_t SnmpOutMsgPrvParmStrng[8+1];
uint8_t SnmpOutMsgPrivParmLen;
uint32_t SnmpEngnSecurityModel;
uint32_t SnmpEngnMsgProcessModel;
SecuritySysProcessIncomingMsg SecurtyPrimtvesOfIncmngPdu;
snmpV3EngnUserDataBase UserInfoDataBase[SNMPV3_USM_MAX_USER];
} SNMPV3_STACK_DCPT_STUB;
Description
SNMPv3 Descriptor Structure Typedef
Members
Members Description
uint8_t SnmpEngineID[32]; Reserving 32 bytes for the snmpEngineID as the octet string length can
vary form 5 to 32
uint32_t SnmpEngineBoots; The number of times that the SNMP engine has (re-)initialized itself
since snmpEngineID was last configured.
TCPIP_UINT32_VAL SnmpEngineTime; The number of seconds since the value of the SnmpEngineBoots
object last changed
snmpV3TrapConfigDataBase
Snmpv3TrapConfigData[SNMPV3_USM_MAX_USER];
snmv3 global database for trap table
uint32_t SnmpEngnSecurityModel; Maximum range (2^31-1), RFC3411
uint32_t SnmpEngnMsgProcessModel; Maximum range (2^31-1), RFC3411
5.8.22.8 Files
Files
Name Description
snmp.h
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snmp_config.h SNMP configuration file
snmpv3.h This is file snmpv3.h.
snmpv3_config.h SNMPv3 configuration file
Description
5.8.22.8.1 snmp.h
SNMP Defs for Microchip TCP/IP Stack
Enumerations
Name Description
GENERIC_TRAP_NOTIFICATION_TYPE This is type GENERIC_TRAP_NOTIFICATION_TYPE.
SNMP_COMMUNITY_TYPE This is type SNMP_COMMUNITY_TYPE.
SNMP_TRAP_IP_ADDRESS_TYPE This is type SNMP_TRAP_IP_ADDRESS_TYPE.
TCPIP_SNMP_SM This is type TCPIP_SNMP_SM.
VENDOR_SPECIFIC_TRAP_NOTIFICATION_TYPE This is type
VENDOR_SPECIFIC_TRAP_NOTIFICATION_TYPE.
Functions
Name Description
SNMPGetExactIndex To search for exact index node in case of a Sequence variable.
SNMPGetNextIndex To search for next index node in case of a Sequence variable.
SNMPGetVar Used to Get/collect OID variable information.
SNMPIsValidSetLen Validates the set variable data length to data type.
SNMPSendTrap Prepare, validate remote node which will receive trap and send trap
pdu.
SNMPSetVar This routine Set the mib variable with the requested value.
SNMPValidateCommunity Validates community name for access control.
TCPIP_SNMP_ClientGetNet
TCPIP_SNMP_DataCopyToProcessBuffer Copies uint8_t data to dynamically allocated memory buffer.
TCPIP_SNMP_EventNotifyGet To Get the IPv6 DHCP event notification.
TCPIP_SNMP_Notify Creates and Sends TRAP pdu.
TCPIP_SNMP_NotifyIsReady Resolves given remoteHost IP address into MAC address.
TCPIP_SNMP_NotifyPrepare Collects trap notification info and send ARP to remote host.
TCPIP_SNMP_PacketProcStubPtrsGet Get SNMP packet processing memory pointer.
TCPIP_SNMP_ProcessBufferDataGet Reads uint8_t data from dynamically allocated memory buffer.
TCPIP_SNMP_ReadCommunityGet Get the readCommunity String with Snmp index.
TCPIP_SNMP_TrapTimeGet Get SNMP Trap UDP client open socket timeout.
TCPIP_SNMP_WriteCommunityGet Get the writeCommunity String with Snmp index.
Macros
Name Description
SNMP_END_OF_VAR This is macro SNMP_END_OF_VAR.
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SNMP_H FileName: SNMP.h Copyright © 2012 released Microchip Technology Inc. All
rights reserved.
Microchip licenses to you the right to use, modify, copy and distribute Software
only when embedded on a Microchip microcontroller or digital signal controller that
is integrated into your product or third party product (pursuant to the sublicense
terms in the accompanying license agreement).
You should refer to the license agreement accompanying this Software for
additional information regarding your rights and obligations.
SOFTWARE AND DOCUMENTATION ARE PROVIDED “AS IS” WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE,
NON-INFRINGEMENT AND... more
SNMP_INDEX_INVALID This is macro SNMP_INDEX_INVALID.
SNMP_START_OF_VAR
SNMP_V1
SNMP_V2C This is macro SNMP_V2C.
SNMP_V3 This is macro SNMP_V3.
Structures
Name Description
tIPV6_SNMP_TRAP_INFO This is type IPV6_SNMP_TRAP_INFO.
tSNMP_TRAP_INFO This is type SNMP_TRAP_INFO.
IPV6_SNMP_TRAP_INFO This is type IPV6_SNMP_TRAP_INFO.
SNMP_BUFFER_DATA SNMPv1/v2c
SNMP_MODULE_CONFIG This is type SNMP_MODULE_CONFIG.
SNMP_NON_MIB_RECD_INFO This is type SNMP_NON_MIB_RECD_INFO.
SNMP_NOTIFY_INFO // the only if that runs SNMP
SNMP_PROCESSING_MEM_INFO_PTRS This is type SNMP_PROCESSING_MEM_INFO_PTRS.
SNMP_STACK_DCPT_STUB
SNMP_TRAP_INFO This is type SNMP_TRAP_INFO.
TCPIP_SNMP_DCPT TCPIP_STACK_USE_IPV6
Types
Name Description
SNMP_ID This is the SNMP OID variable id. This id is assigned via MIB file. Only dynamic
and AgentID variables can contian ID. MIB2BIB utility enforces this rules when BIB
was generated. typedef int SNMP_ID;
SNMP_INDEX This is type SNMP_INDEX.
Unions
Name Description
SNMP_VAL This is type SNMP_VAL.
5.8.22.8.2 snmp_config.h
Simple Network Managment Protocol (SNMP) Configuration file
This file contains the SNMP module configuration options
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Macros
Name Description
END_OF_SNMP_READ_COMMUNITIES ??
END_OF_SNMP_WRITE_COMMUNITIES ??
MY_DEFAULT_SNMP_IF For multi-homed hosts, the default SNMP interface
NOTIFY_COMMUNITY_LEN Length of Community name array
OID_MAX_LEN Change this to match your OID string length.
SNMP_BIB_FILE_NAME Name of the bib file for snmp
SNMP_COMMUNITY_MAX_LEN This is the maximum length for community string.
Application must ensure that this length is observed. SNMP
module adds one byte extra after
SNMP_COMMUNITY_MAX_LEN for adding '0' NULL
character.
SNMP_MAX_COMMUNITY_SUPPORT Specifying more strings than
SNMP_MAX_COMMUNITY_SUPPORT will result in the
later strings being ignored (but still wasting program
memory). Specifying fewer strings is legal, as long as at
least one is present.
SNMP_MAX_MSG_SIZE SNMP MIN and MAX message 484 bytes in size. As per
RFC 3411 snmpEngineMaxMessageSize and RFC 1157 (
section 4- protocol specification ) and implementation
supports more than 484 whenever feasible.
SNMP_MAX_NON_REC_ID_OID Update the Non record id OID value which is part of
CustomSnmpDemo.c file
SNMP_READ_COMMUNITIES Default SNMPv2C community names. These can be
overridden at run time if alternate strings are present in
external EEPROM or Flash (actual strings coould be stored
by the TCPIP storage service. These strings are case
sensitive. An empty string means disabled (not matchable).
For application security, these default community names
should not be used, but should all be disabled to force the
end user to select unique community names. These defaults
are provided only to make it easier to start development.
Specifying more strings than
SNMP_MAX_COMMUNITY_SUPPORT will result in the
later strings being ignored (but still wasting program
memory). Specifying... more
SNMP_TRAP_COMMUNITY_MAX_LEN_MEM_USE This macro will be used to avoid SNMP OID memory buffer
corruption
SNMP_WRITE_COMMUNITIES Default SNMPv2C community names. See
SNMP_READ_COMMUNITIES for more information.
TRAP_COMMUNITY_MAX_LEN Maximum length of community name table
TRAP_TABLE_SIZE This table maintains list of intereseted receivers who should
receive notifications when some interesting event occurs.
Structures
Name Description
SNMP_NET_CONFIG SNMP Network Configuration structure typedef
5.8.22.8.3 snmpv3.h
This is file snmpv3.h.
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Functions
Name Description
SNMPv3ComputeHMACIpadOpadForAuthLoclzedKey Compute HMAC inner and outer pad for
authorization localized key.
SNMPv3USMAuthPrivPswdLocalization Convert Auth and Priv password to the localized
Key using SNMPEngineID.
TCPIP_SNMPv3_CmprTrapSecNameAndSecLvlWithUSMDb Routine to find the index of the user name in the
user data base table.
TCPIP_SNMPv3_Notify Creates and Sends SNMPv3 TRAP pdu.
TCPIP_SNMPV3_PacketProcStubPtrsGet Get SNMPv3 packet processing memory pointer.
Structures
Name Description
SNMPV3_PROCESSING_MEM_INFO_PTRS SNMPv3 Processing Memory Pointers
SNMPV3_STACK_DCPT_STUB SNMPv3 Descriptor Structure Typedef
5.8.22.8.4 snmpv3_config.h
Simple Network Managment Protocol (SNMPv3) Configuration file
This file contains the SNMPv3 module configuration options
Macros
Name Description
AUTH_LOCALIZED_PASSWORD_KEY_LEN SNMPv3 Authentication Localized passwed
key lenegth size
PRIV_LOCALIZED_PASSWORD_KEY_LEN SNMPv3 Privacy Pasword key length size
SNMPV3_AUTH_LOCALIZED_PASSWORD_KEY_LEN_MEM_USE SNMPv3 authentication localized Key length
for memory validation
SNMPV3_PRIV_LOCALIZED_PASSWORD_KEY_LEN_MEM_USE SNMPv3 privacy key length size for memory
validation
SNMPV3_TRAP_MSG_PROCESS_MODEL_DB This is macro
SNMPV3_TRAP_MSG_PROCESS_MODEL
_DB.
SNMPV3_TRAP_SECURITY_LEVEL_DB This is macro
SNMPV3_TRAP_SECURITY_LEVEL_DB.
SNMPV3_TRAP_SECURITY_MODEL_TYPE_DB This is macro
SNMPV3_TRAP_SECURITY_MODEL_TYPE
_DB.
SNMPV3_TRAP_USER_SECURITY_NAME_DB This is macro
SNMPV3_TRAP_USER_SECURITY_NAME
_DB.
SNMPV3_USER_AUTH_PASSWD_DB This is macro
SNMPV3_USER_AUTH_PASSWD_DB.
SNMPV3_USER_AUTH_TYPE_DB This is macro
SNMPV3_USER_AUTH_TYPE_DB.
SNMPV3_USER_PRIV_PASSWD_DB This is macro
SNMPV3_USER_PRIV_PASSWD_DB.
SNMPV3_USER_PRIV_TYPE_DB This is macro
SNMPV3_USER_PRIV_TYPE_DB.
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SNMPV3_USER_SECURITY_NAME_DB This is macro
SNMPV3_USER_SECURITY_NAME_DB.
SNMPV3_USER_SECURITY_NAME_LEN_MEM_USE User security name length for memory
validation
SNMPV3_USM_MAX_USER Client configuration options
USER_SECURITY_NAME_LEN SNMPv3 User Security Name length
5.8.23 SNTP TCP/IP Stack Library
5.8.23.1 Introduction
Simple Network Time Protocol (SNTP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the SNTP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The SNTP module implements the Simple Network Time Protocol. The module (by default) updates its internal time every 10
minutes using a pool of public global time servers. It then calculates reference times on any call to SNTPGetUTCSeconds (see
page 458) using the internal Tick timer module.
The SNTP module is good for providing absolute time stamps. However, it should not be relied upon for measuring time
differences (especially small differences). The pool of public time servers is implemented using round-robin DNS, so each
update will come from a different server. Differing network delays and the fact that these servers are not verified implies that this
time could be non-linear. While it is deemed reliable, it is not guaranteed to be accurate.
The Tick module provides much better accuracy (since it is driven by a hardware clock) and resolution, and should be used for
measuring timeouts and other internal requirements.
Developers can change the value of NTP_SERVER ( see page 462) if they wish to always point to a preferred time server, or to
specify a region when accessing time servers. The default is to use the global pool.
5.8.23.2 Release Notes
MPLAB Harmony Version: v0.70b SNTP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
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Nothing to report in this release.
5.8.23.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.23.4 Using the Library
This topic describes the basic architecture of the SNTP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: sntp.h
The interface to the SNTP TCP/IP Stack library is defined in the "sntp.h" header file. This file is included by the "tcpip.h" file. Any
C language source (.c) file that uses the SNTP TCP/IP Stack library should include "tcpip.h".
Library File:
The SNTP TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.23.4.1 Abstraction Model
This library provides the API of the SNTP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
SNTP Software Abstraction Block Diagram
Note: This image was not available at time of release and will be added in a future release of MPLAB Harmony.
5.8.23.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the SNTP module.
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Library Interface Section Description
Functions Routines for configuring SNTP
Data Types and Constants This section provides various definitions describing this API
5.8.23.5 Configuring the Library
Macros
Name Description
NTP_DEFAULT_CONNECTION_TYPE The default connection type to use: IPv4/IPv6
NTP_DEFAULT_IF for multi-homed hosts, the default SNTP interface
NTP_EPOCH Reference Epoch to use. (default: 01-Jan-1970 00:00:00)
NTP_FAST_QUERY_INTERVAL Defines how long to wait to retry an update after a failure, seconds.
Updates may take up to 6 seconds to fail, so this 14 second delay is
actually only an 8-second retry.
NTP_MAX_RETRIES Number of retries to connect to the server
NTP_MAX_STRATUM The maximum acceptable NTP stratum number Should be less than 16
(unsynchronized server)
NTP_QUERY_INTERVAL Defines how frequently to resynchronize the date/time, seconds (default:
10 minutes)
NTP_REPLY_TIMEOUT Defines how long to wait before assuming the query has failed, seconds
NTP_SERVER These are normally available network time servers. The actual IP returned
from the pool will vary every minute so as to spread the load around
stratum 1 timeservers. For best accuracy and network overhead you
should locate the pool server closest to your geography, but it will still
work if you use the global pool.ntp.org address or choose the wrong one
or ship your embedded device to another geography.
NTP_SERVER_PORT Port for contacting NTP servers
NTP_TIME_STAMP_TMO elapsed time that qualifies a time stamp as stale normally it should be
correlated with NTP_QUERY_INTERVAL
NTP_VERSION The default NTP version to use (3 or 4)
Description
The configuration of the SNTP TCP/IP Stack Library is based on the file tcpip_config.h
This header file contains the configuration selection for the SNTP TCP/IP Stack Library. Based on the selections made, the
SNTP TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all instances
of the SNTP TCP/IP Stack Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.23.5.1 NTP_DEFAULT_CONNECTION_TYPE Macro
C
#define NTP_DEFAULT_CONNECTION_TYPE (IP_ADDRESS_TYPE_IPV4)
Description
The default connection type to use: IPv4/IPv6
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5.8.23.5.2 NTP_DEFAULT_IF Macro
C
#define NTP_DEFAULT_IF "PIC32INT"
Description
for multi-homed hosts, the default SNTP interface
5.8.23.5.3 NTP_EPOCH Macro
C
#define NTP_EPOCH (86400ul * (365ul * 70ul + 17ul))
Description
Reference Epoch to use. (default: 01-Jan-1970 00:00:00)
5.8.23.5.4 NTP_FAST_QUERY_INTERVAL Macro
C
#define NTP_FAST_QUERY_INTERVAL (14ul)
Description
Defines how long to wait to retry an update after a failure, seconds. Updates may take up to 6 seconds to fail, so this 14 second
delay is actually only an 8-second retry.
5.8.23.5.5 NTP_MAX_RETRIES Macro
C
#define NTP_MAX_RETRIES (3)
Description
Number of retries to connect to the server
5.8.23.5.6 NTP_MAX_STRATUM Macro
C
#define NTP_MAX_STRATUM (15)
Description
The maximum acceptable NTP stratum number Should be less than 16 (unsynchronized server)
5.8.23.5.7 NTP_QUERY_INTERVAL Macro
C
#define NTP_QUERY_INTERVAL (10ul*60ul)
Description
Defines how frequently to resynchronize the date/time, seconds (default: 10 minutes)
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5.8.23.5.8 NTP_REPLY_TIMEOUT Macro
C
#define NTP_REPLY_TIMEOUT (6ul)
Description
Defines how long to wait before assuming the query has failed, seconds
5.8.23.5.9 NTP_SERVER Macro
C
#define NTP_SERVER "pool.ntp.org"
Description
These are normally available network time servers. The actual IP returned from the pool will vary every minute so as to spread
the load around stratum 1 timeservers. For best accuracy and network overhead you should locate the pool server closest to
your geography, but it will still work if you use the global pool.ntp.org address or choose the wrong one or ship your embedded
device to another geography.
5.8.23.5.10 NTP_SERVER_PORT Macro
C
#define NTP_SERVER_PORT (123ul)
Description
Port for contacting NTP servers
5.8.23.5.11 NTP_TIME_STAMP_TMO Macro
C
#define NTP_TIME_STAMP_TMO (11 * 60)
Description
elapsed time that qualifies a time stamp as stale normally it should be correlated with NTP_QUERY_INTERVAL
5.8.23.5.12 NTP_VERSION Macro
C
#define NTP_VERSION (4)
Description
The default NTP version to use (3 or 4)
5.8.23.6 Building the Library
This section list the files that are available in the \src of the SNTP driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
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5.8.23.7 Library Interface
Data Types and Constants
Name Description
SNTP_MODULE_CONFIG Placeholder for SNTP Module Configuration
SNTP_RESULT Provides a list of possible results for the SNTP module.
Functions
Name Description
TCPIP_SNTP_ConnectionInitiate Forces a connection to the NTP server
TCPIP_SNTP_ConnectionParamSet Sets the current SNTP connection parameters
TCPIP_SNTP_LastErrorGet Gets the last error code set in the NTP server
TCPIP_SNTP_TimeStampGet Gets the last valid timestamp obtained from an NTP server
TCPIP_SNTP_UTCSecondsGet Obtains the current time from the SNTP module.
Description
This section describes the Application Programming Interface (API) functions of the SNTP TCP/IP Stack.
Refer to each section for a detailed description.
5.8.23.7.1 Functions
5.8.23.7.1.1 TCPIP_SNTP_ConnectionInitiate Function
C
SNTP_RESULT TCPIP_SNTP_ConnectionInitiate();
Description
This function will start a conenction to the NTP server
Preconditions
TCP/IP Stack should have been initialized
Returns
SNTP_RES_OK - if the call succeded SNTP_RES_BUSY error code if the connection could not have been started
Remarks
None
5.8.23.7.1.2 TCPIP_SNTP_ConnectionParamSet Function
C
SNTP_RESULT TCPIP_SNTP_ConnectionParamSet(
TCPIP_NET_HANDLE netH,
IP_ADDRESS_TYPE ntpConnType
);
Description
This function sets the parameters for the next SNTP connections.
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Preconditions
TCP/IP Stack should have been initialized
Parameters
Parameters Description
netH new interface to use as default SNTP interface if 0, the current interface is not
changed
ntpConnType type of conenction to make: IPv4 or IPv6 if IP_ADDRESS_TYPE_ANY, the current
setting is not changed
Returns
SNTP_RES_OK - if the call succeded SNTP_RESULT error code otherwise
Remarks
None
5.8.23.7.1.3 TCPIP_SNTP_LastErrorGet Function
C
SNTP_RESULT TCPIP_SNTP_LastErrorGet();
Description
This function returns the last NTP error code and clears the current error code
Preconditions
TCP/IP Stack should have been initialized
Returns
the last error code encountered by the NTP module
Remarks
None
5.8.23.7.1.4 TCPIP_SNTP_TimeStampGet Function
C
SNTP_RESULT TCPIP_SNTP_TimeStampGet(
uint64_t* pTStamp,
SYS_TICK* pLastUpdate
);
Description
This function gets the last valid timestamp obtained from an NTP server
Preconditions
TCP/IP Stack should have been initialized
Parameters
Parameters Description
pTStamp pointer to a 64 bit buffer to store the last NTP timestamp could be NULL if the
timestamp not needed
pLastUpdate pointer to store the last time stamp update tick could be NULL if the update time
not needed
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Returns
SNTP_RES_OK - if the call succeded SNTP_RES_TSTAMP_STALE error code if there's no recent time stamp
Remarks
None
5.8.23.7.1.5 TCPIP_SNTP_UTCSecondsGet Function
C
uint32_t TCPIP_SNTP_UTCSecondsGet();
Description
This function obtains the current time as reported by the SNTP module. Use this value for absolute time stamping. The value
returned is (by default) the number of seconds since 01-Jan-1970 00:00:00.
Preconditions
TCP/IP Stack should have been initialized
Returns
The number of seconds since the Epoch. (Default 01-Jan-1970 00:00:00)
Remarks
Do not use this function for time difference measurements. The Tick module is more appropriate for those requirements.
5.8.23.7.2 Data Types and Constants
5.8.23.7.2.1 SNTP_MODULE_CONFIG Structure
C
typedef struct {
} SNTP_MODULE_CONFIG;
Description
Placeholder for SNTP Module Configuration
5.8.23.7.2.2 SNTP_RESULT Enumeration
C
typedef enum {
SNTP_RES_OK,
SNTP_RES_PROGRESS,
SNTP_RES_BUSY = -1,
SNTP_RES_TSTAMP_STALE = -2,
SNTP_RES_SKT_ERR = -3,
SNTP_RES_NTP_SERVER_TMO = -4,
SNTP_RES_NTP_VERSION_ERR = -5,
SNTP_RES_NTP_TSTAMP_ERR = -6,
SNTP_RES_NTP_SYNC_ERR = -7,
SNTP_RES_NTP_KOD_ERR = -8,
SNTP_RES_NTP_DNS_ERR = -9
} SNTP_RESULT;
Description
SNTP_RESULT Enumeration
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Provides a list of possible SNTP results.
Members
Members Description
SNTP_RES_OK the operation was successful
SNTP_RES_PROGRESS an NTP operation is in progress
SNTP_RES_BUSY = -1 module is busy
SNTP_RES_TSTAMP_STALE = -2 timestamp is stale, there's no recent timestamp
SNTP_RES_SKT_ERR = -3 NTP socket could not be opened
SNTP_RES_NTP_SERVER_TMO = -4 NTP server could not be accessed
SNTP_RES_NTP_VERSION_ERR = -5 wrong NTP version received
SNTP_RES_NTP_TSTAMP_ERR = -6 wrong NTP time stamp received
SNTP_RES_NTP_SYNC_ERR = -7 NTP time synchronization error
SNTP_RES_NTP_KOD_ERR = -8 an NTP KissOfDeath code has been received
SNTP_RES_NTP_DNS_ERR = -9 an NTP DNS error
Remarks
None
5.8.23.8 Files
Files
Name Description
sntp.h
sntp_config.h SNTP configuration file
Description
5.8.23.8.1 sntp.h
SNTP Client Module Header
Enumerations
Name Description
SNTP_RESULT Provides a list of possible results for the SNTP module.
Functions
Name Description
TCPIP_SNTP_ConnectionInitiate Forces a connection to the NTP server
TCPIP_SNTP_ConnectionParamSet Sets the current SNTP connection parameters
TCPIP_SNTP_LastErrorGet Gets the last error code set in the NTP server
TCPIP_SNTP_TimeStampGet Gets the last valid timestamp obtained from an NTP server
TCPIP_SNTP_UTCSecondsGet Obtains the current time from the SNTP module.
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Structures
Name Description
SNTP_MODULE_CONFIG Placeholder for SNTP Module Configuration
5.8.23.8.2 sntp_config.h
Network Time Protocol (SNTP) Configuration file
This file contains the SNTP module configuration options
Macros
Name Description
NTP_DEFAULT_CONNECTION_TYPE The default connection type to use: IPv4/IPv6
NTP_DEFAULT_IF for multi-homed hosts, the default SNTP interface
NTP_EPOCH Reference Epoch to use. (default: 01-Jan-1970 00:00:00)
NTP_FAST_QUERY_INTERVAL Defines how long to wait to retry an update after a failure, seconds.
Updates may take up to 6 seconds to fail, so this 14 second delay is
actually only an 8-second retry.
NTP_MAX_RETRIES Number of retries to connect to the server
NTP_MAX_STRATUM The maximum acceptable NTP stratum number Should be less than 16
(unsynchronized server)
NTP_QUERY_INTERVAL Defines how frequently to resynchronize the date/time, seconds (default:
10 minutes)
NTP_REPLY_TIMEOUT Defines how long to wait before assuming the query has failed, seconds
NTP_SERVER These are normally available network time servers. The actual IP returned
from the pool will vary every minute so as to spread the load around
stratum 1 timeservers. For best accuracy and network overhead you
should locate the pool server closest to your geography, but it will still
work if you use the global pool.ntp.org address or choose the wrong one
or ship your embedded device to another geography.
NTP_SERVER_PORT Port for contacting NTP servers
NTP_TIME_STAMP_TMO elapsed time that qualifies a time stamp as stale normally it should be
correlated with NTP_QUERY_INTERVAL
NTP_VERSION The default NTP version to use (3 or 4)
5.8.24 SSL TCP/IP Stack Library
5.8.24.1 Introduction
Secure Sockets Layer (SSL) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the SSL TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
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Description
The SSL module adds encryption support to the TCP layer by implementing the SSLv3 protocol. This protocol is the standard for
secure communications across the Internet, and prevents snooping or tampering of data as it travels across an untrusted
network. This implementation of SSL supports the RSA asymmetric encryption protocol and the ARCFOUR symmetric
encryption protocol.
To comply with US Export Control restrictions, the encryption portion of the SSL module must be purchased separately from
Microchip. The library of Data Encryption Routines (SW300052) is available for a nominal fee from microchipDirect.
Newer versions of the TCP/IP Stack include modifications to the SSL module to enable an expanded range of RSA key lengths.
This will allow the TCP/IP Stack to support a wider range of SSL client/servers. Because of these changes, you may need to
manually modify your copy of RSA.c or obtain an updated copy from microchipDirect. The following table enumerates which
cryptographic add-on is required for which stack version.
5.8.24.2 Release Notes
MPLAB Harmony Version: v0.70b SSL TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.24.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.24.4 Using the Library
This topic describes the basic architecture of the SSL TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: ssl.h
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The interface to the SSL TCP/IP Stack library is defined in the "ssl.h" header file. This file is included by the "tcpip.h" file. Any C
language source (.c) file that uses the SSL TCP/IP Stack library should include "tcpip.h".
Library File:
The SSL TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.24.4.1 Abstraction Model
This library provides the API of the SSL TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
SSL Software Abstraction Block Diagram
Note: This image was not available at time of release and will be added in a future release of MPLAB Harmony.
5.8.24.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the SSL module.
Library Interface Section Description
Functions Routines for configuring SSL
Data Types and Constants This section provides various definitions describing this API
5.8.24.4.3 How the Library Works
5.8.24.4.3.1 SSL Client Support
An SSL client can be initiated by first opening a TCP connection, then calling TCPStartSSLSession to initiate the SSL
handshake process. The handshake uses the public key from the certificate provided by the server. Key lengths up to 1024 bits
are supported on all processors; key lengths up to 2048 bits are supported on PIC32 microcontrollers. The
SSL_RSA_CLIENT_SIZE macro in SSLClientSize.h sets the maximum certificate key length that your client should process.
#define SSL_RSA_CLIENT_SIZE (1024ul) // Size of Encryption Buffer (must be larger than key
size)
Once the handshake has started, call TCPSSLIsHandshaking ( see page 468) until it returns FALSE. This will indicate that the
handshake has completed and all traffic is now secured using 128-bit ARCFOUR encryption. If the handshake fails for any
reason, the TCP connection will automatically be terminated as required by the SSL protocol specification.
For faster performance, the SSL module caches security parameters for the most recently made connections. This allows quick
reconnections to the same node without the computational expense of another RSA handshake. By default, the two most recent
connections are cached, but this can be modified in TCPIPConfig.h.
SSL client support is already enabled for SMTP. When STACK_USE_SSL_CLIENT is defined, the SMTP module automatically
adds a field to SMTPClient ( see page 304) called UseSSL. That field controls whether or not the SMTP client module will
attempt to make an SSL connection before transmitting any data.
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Note that TCP sockets using SSL may required an increase in TX/RX buffer size to support SSL. You can adjust the size of your
sockets using the TCP/IP Configuration Utility included with the stack.
5.8.24.4.3.2 SSL Server Support
To initiate an SSL server, first open a TCP socket for listening using TCPOpen ( see page 542). Then call TCPAddSSLListener (
see page 468) to listen ( see page 175) for incoming SSL connections on an alternate port. This allows a single socket to share
application-level resources and listen ( see page 175) for connections on two different ports. Connections occurring on the
originally opened port will proceed unsecured, while connections on the SSL port will first complete an SSL handshake to secure
the data.
If you application will not accept ( see page 169) unsecured traffic, simply open a non-secured socket on a free port number,
then verify that each incoming connection is secured (not on that port) by calling TCPIsSSL ( see page 469).
SSL server support is automatically enabled for HTTP2 when STACK_USE_SSL_SERVER is defined. By default, the HTTP2
module will then listen ( see page 175) for unsecured traffic on port 80 and secured connections on port 443.
This SSL server implementation supports key lengths up to 1024 bits on most PIC microcontrollers, and 2048 bits on PIC32
microcontrollers. The SSL_RSA_KEY_SIZE ( see page 471) macro in TCPIPConfig.h sets the server certificate key length.
// Bits in SSL RSA key. This parameter is used for SSL sever
// connections only.
#define SSL_RSA_KEY_SIZE (512ul)
Note that TCP sockets using SSL may required an increase in TX/RX buffer size to support SSL. You can adjust the size ofyour
sockets using the TCP/IP Configuration Utility included with the stack.
5.8.24.4.3.3 SSL Limitations
SSL was designed for desktop PCs with faster processors and significantly more resources than are available on an embedded
platform. A few compromises must be made in order to use SSL in a less resource-intensive manner.
The SSL client module does not perform any validation or verification of certificates. Doing so would require many root
certificates to be stored locally for verification, which is not feasible for memory-limited parts. This does not compromise security
once the connection has been established, but does not provide complete security against man-in-the-middle attacks. (This sort
of attack is uncommon and would be difficult to execute.)
Neither the SSL client nor the server can completely verify MACs before processing data. SSL records include a signature to
verify that messages were not modified in transit. This Message Authentication ( see page 89) Code, or MAC, is inserted after at
least every 16kB of traffic. (It usually is inserted much more frequently than that.) Without 16kB of RAM to buffer packets for
each socket, incoming data must be handed to the application layer before the MAC can be completely verified. Invalid MACs
will still cause the connection to terminate immediately, but by the time this is detected some bad data may have already
reached the application. Since the ARCFOUR cipher in use is a stream cipher, it would be difficult to exploit this in any
meaningful way. An attacker would not be able to control what data is actually modified or inserted, as doing so without
knowledge of the key would yield garbage. However, it is important to understand that incoming data is not completely verified
before being passed to the application.
5.8.24.4.4 Generating Server Certificates
The SSL certificates used by the TCP/IP Stack's SSL module are stored in the CustomSSLCert.c source file. The following
series of steps describe how to create the structures in CustomSSLCert.c using an SSL certificate.
1. Download and install the OpenSSL library. There are several third-party sites that offer SSL installers (e.g.
http://www.slproweb.com/products/Win32OpenSSL.html). Note that some distributions may not include all commands
specified by the OpenSSL documentation.
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2. Open a console and change directory to the OpenSSL/bin folder.
3. If you don't have a key and certificate, you can generate them first. The following example console commands will generate a
a 512-bit key:
1. Generate the key: openssl genrsa -out 512bits.key 512
2. Generate the Certificate Signing Request (CSR). You will need to add additional information when prompted: openssl req
-new -key 512bits.key -out 512bits.csr
3. Generate the X.509 certificate if self-signing (or send the CSR to a Certificate Authority for signing): openssl x509 -req
-days 365 -in 512bits.csr -signkey 512bits.key -out 512bits.crt (note that if the -days option is not specified, the default
expiration time is 30 days)
4. For additional documentation, refer to http://www.openssl.org/docs/apps/openssl.html.
4. Parse your key file using the command: openssl.exe asn1parse -in "[directory containing your key]\512bits.key"
5. You should see a screen like this:
6. If you are not using an ENCX24J600 family device, then the last 5 integers displayed here are the SSL_P, SSL_Q, SSL_dP,
SSL_dQ, and SSL_qInv parameters, respectively. However, they are displayed here in big-endian format, and the Microchip
cryptographic library implementation requires parameters in little-endian format, so you will have to enter the parameters into
the C arrays in opposite order. For example, the INTEGER at offset 145:
145:d=1 h1=2 ;= 33 prim: INTEGER
:D777566780029FCD610200B66D89507D
915E3E5BDB6FAB0233B5DFA2E4081DF7
will be swapped in the CustomSSLCert.c file:
ROM BYTE SSL_P[] = {
0xF7 , 0x1D, 0x08, 0xE4, 0xA2, 0xDF, 0xB5, 0x33,
0x02, 0xAB, 0x6F, 0xDB, 0x5B, 0x3E, 0x5E, 0x91,
0x7D, 0x50, 0x89, 0x6D, 0xB6, 0x00, 0x02, 0x61,
0xCD, 0x9F, 0x02, 0x80, 0x67, 0x56, 0x77, 0xD7
};
7. If you are using an ENCX24J600 family device, then the second and fourth integers displayed here are the SSL_N and
SSL_D parameters, respectively. There is no need to do an endian format change for these parameters. For the example, the
expected SSL_N and SSL_D values are shown in the figure below:
8. Parse your X.509 certificate using the command: openssl.exe asn1parse -in "[directory containing your cert]\512bits.crt"
-out cert.bin
9. Open the cert.bin output file in a hex editor. For example, here is the default certificate information generated from 512bits.crt
given in the stack:
10. This information must be copied verbatim into the SSL_CERT [] array. Note that this is binary data (not a large integer) so it
does not get endian-swapped like the private key parameters.
ROM BYTE SSL_CERT[524] = {
0x30, 0x82, 0x02, 0x08, 0x30, 0x82, 0x01, 0xb2, 0x02, 0x09, 0x00, 0xa5, 0x6a, 0xea, 0x1a,
0xa9,
0x52, 0x9d, 0x1e, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01,
0x05,
0x05, 0x00, 0x30, 0x81, 0x8a, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13,
0x02,
0x55, 0x53, 0x31, 0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04, 0x08, 0x13, 0x07, 0x41, 0x72,
0x69,
0x7a, 0x6f, 0x6e, 0x61, 0x31, 0x11, 0x30, 0x0f, 0x06, 0x03, 0x55, 0x04, 0x07, 0x13, 0x08,
0x43,
0x68, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x31, 0x23, 0x30, 0x21, 0x06, 0x03, 0x55, 0x04,
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0x0a,
0x13, 0x1a, 0x4d, 0x69, 0x63, 0x72, 0x6f, 0x63, 0x68, 0x69, 0x70, 0x20, 0x54, 0x65, 0x63,
0x68,
0x6e, 0x6f, 0x6c, 0x6f, 0x67, 0x79, 0x2c, 0x20, 0x49, 0x6e, 0x63, 0x2e, 0x31, 0x1d, 0x30,
0x1b,
0x06, 0x03, 0x55, 0x04, 0x0b, 0x13, 0x14, 0x53, 0x53, 0x4c, 0x20, 0x44, 0x65, 0x6d, 0x6f,
0x20,
0x43, 0x65, 0x72, 0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x65, 0x31, 0x12, 0x30, 0x10,
0x06,
0x03, 0x55, 0x04, 0x03, 0x13, 0x09, 0x6d, 0x63, 0x68, 0x70, 0x62, 0x6f, 0x61, 0x72, 0x64,
0x30,
0x1e, 0x17, 0x0d, 0x30, 0x37, 0x31, 0x30, 0x30, 0x39, 0x31, 0x38, 0x33, 0x37, 0x32, 0x37,
0x5a,
0x17, 0x0d, 0x31, 0x37, 0x31, 0x30, 0x30, 0x36, 0x31, 0x38, 0x33, 0x37, 0x32, 0x37, 0x5a,
0x30,
0x81, 0x8a, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53,
0x31,
0x10, 0x30, 0x0e, 0x06, 0x03, 0x55, 0x04, 0x08, 0x13, 0x07, 0x41, 0x72, 0x69, 0x7a, 0x6f,
0x6e,
0x61, 0x31, 0x11, 0x30, 0x0f, 0x06, 0x03, 0x55, 0x04, 0x07, 0x13, 0x08, 0x43, 0x68, 0x61,
0x6e,
0x64, 0x6c, 0x65, 0x72, 0x31, 0x23, 0x30, 0x21, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13, 0x1a,
0x4d,
0x69, 0x63, 0x72, 0x6f, 0x63, 0x68, 0x69, 0x70, 0x20, 0x54, 0x65, 0x63, 0x68, 0x6e, 0x6f,
0x6c,
0x6f, 0x67, 0x79, 0x2c, 0x20, 0x49, 0x6e, 0x63, 0x2e, 0x31, 0x1d, 0x30, 0x1b, 0x06, 0x03,
0x55,
0x04, 0x0b, 0x13, 0x14, 0x53, 0x53, 0x4c, 0x20, 0x44, 0x65, 0x6d, 0x6f, 0x20, 0x43, 0x65,
0x72,
0x74, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x65, 0x31, 0x12, 0x30, 0x10, 0x06, 0x03, 0x55,
0x04,
0x03, 0x13, 0x09, 0x6d, 0x63, 0x68, 0x70, 0x62, 0x6f, 0x61, 0x72, 0x64, 0x30, 0x5c, 0x30,
0x0d,
0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, 0x00, 0x03, 0x4b,
0x00,
0x30, 0x48, 0x02, 0x41, 0x00, 0xaa, 0x96, 0xca, 0x97, 0xea, 0x27, 0xb0, 0xd7, 0xe9, 0x21,
0xd0,
0x40, 0xd4, 0x2c, 0x09, 0x5a, 0x2e, 0x3a, 0xe4, 0x12, 0x64, 0x2d, 0x4b, 0x1b, 0x92, 0xdf,
0x79,
0x68, 0x4e, 0x3c, 0x51, 0xf4, 0x43, 0x48, 0x0d, 0xf2, 0xc8, 0x50, 0x9b, 0x6e, 0xe5, 0xea,
0xfe,
0xef, 0xd9, 0x10, 0x41, 0x08, 0x14, 0xf9, 0x85, 0x49, 0xfc, 0x50, 0xd3, 0x57, 0x34, 0xdc,
0x3a,
0x0d, 0x79, 0xf8, 0xd3, 0x99, 0x02, 0x03, 0x01, 0x00, 0x01, 0x30, 0x0d, 0x06, 0x09, 0x2a,
0x86,
0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00, 0x03, 0x41, 0x00, 0x18, 0x18, 0xfe,
0x8b,
0x2d, 0x0d, 0xf7, 0x0d, 0x65, 0x9d, 0x29, 0xec, 0xb3, 0x51, 0x6e, 0x3b, 0x93, 0xbb, 0x40,
0x1a,
0x0b, 0x34, 0x07, 0x63, 0x5e, 0x6a, 0x1c, 0x74, 0x59, 0xd4, 0x54, 0xd2, 0x1b, 0xf3, 0x31,
0xb7,
0x57, 0x4b, 0xa5, 0xe6, 0xe2, 0x35, 0xf7, 0xb3, 0x6a, 0x15, 0x6e, 0x3c, 0x93, 0x85, 0xb2,
0xca,
0xf5, 0x35, 0x00, 0xf4, 0x49, 0xe7, 0x00, 0x8a, 0x00, 0xd8, 0xe8, 0xcf
};
11. Update the SSL_CERT_LEN variable to contain the correct value.
5.8.24.5 Configuring the Library
Macros
Name Description
SSL_MAX_BUFFERS Max # of SSL buffers (2 per socket)
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SSL_MAX_CONNECTIONS Maximum number of simultaneous connections via SSL
SSL_MAX_HASHES Max # of SSL hashes (2 per socket, plus 1 to avoid deadlock)
SSL_MAX_SESSIONS Max number of cached SSL sessions
SSL_MIN_SESSION_LIFETIME Minimum lifetime for SSL Sessions Sessions cannot be reallocated until this
much time (seconds) has elapsed
SSL_MULTIPLE_INTERFACES SSL on all interfaces in a multi-homed host set to 0 to work only on one
interface
SSL_RSA_CLIENT_SIZE Size of encryption buffer, must be at least as big as the key size
SSL_RSA_KEY_SIZE Bits in SSL RSA key. This parameter is used for SSL sever connections only.
The only valid value is 512 bits (768 and 1024 bits do not work at this time).
Note, however, that SSL client operations do currently work up to 1024 bit
RSA key length.
SSL_RSA_LIFETIME_EXTENSION Lifetime extension for RSA operations Sessions lifetime is extended by this
amount (seconds) when an RSA calculation is made
SSL_VERSION Moved from MicrochipIncludeTCPIP StackSSL.h
SSL_VERSION_HI SSL version number (high byte)
SSL_VERSION_LO SSL version number (low byte)
Description
The configuration of the SSL TCP/IP Stack Library is based on the file tcpip_config.h
This header file contains the configuration selection for the SSL TCP/IP Stack Library. Based on the selections made, the SSL
TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all instances of the
TCP/IP Stack SSL Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.24.5.1 SSL_MAX_BUFFERS Macro
C
#define SSL_MAX_BUFFERS (4)
Description
Max # of SSL buffers (2 per socket)
5.8.24.5.2 SSL_MAX_CONNECTIONS Macro
C
#define SSL_MAX_CONNECTIONS (2)
Description
Maximum number of simultaneous connections via SSL
5.8.24.5.3 SSL_MAX_HASHES Macro
C
#define SSL_MAX_HASHES (5)
Description
Max # of SSL hashes (2 per socket, plus 1 to avoid deadlock)
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5.8.24.5.4 SSL_MAX_SESSIONS Macro
C
#define SSL_MAX_SESSIONS (2)
Description
Max number of cached SSL sessions
5.8.24.5.5 SSL_MIN_SESSION_LIFETIME Macro
C
#define SSL_MIN_SESSION_LIFETIME (1ul)
Description
Minimum lifetime for SSL Sessions Sessions cannot be reallocated until this much time (seconds) has elapsed
5.8.24.5.6 SSL_MULTIPLE_INTERFACES Macro
C
#define SSL_MULTIPLE_INTERFACES 1
Description
SSL on all interfaces in a multi-homed host set to 0 to work only on one interface
5.8.24.5.7 SSL_RSA_CLIENT_SIZE Macro
C
#define SSL_RSA_CLIENT_SIZE (1024ul)
Description
Size of encryption buffer, must be at least as big as the key size
5.8.24.5.8 SSL_RSA_KEY_SIZE Macro
C
#define SSL_RSA_KEY_SIZE (1024ul)
Description
Bits in SSL RSA key. This parameter is used for SSL sever connections only. The only valid value is 512 bits (768 and 1024 bits
do not work at this time). Note, however, that SSL client operations do currently work up to 1024 bit RSA key length.
5.8.24.5.9 SSL_RSA_LIFETIME_EXTENSION Macro
C
#define SSL_RSA_LIFETIME_EXTENSION (8ul)
Description
Lifetime extension for RSA operations Sessions lifetime is extended by this amount (seconds) when an RSA calculation is made
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5.8.24.5.10 SSL_VERSION Macro
C
#define SSL_VERSION (0x0300u) // Moved from Microchip\Include\TCPIP Stack\SSL.h
Description
Moved from MicrochipIncludeTCPIP StackSSL.h
5.8.24.5.11 SSL_VERSION_HI Macro
C
#define SSL_VERSION_HI (0x03u)
Description
SSL version number (high byte)
5.8.24.5.12 SSL_VERSION_LO Macro
C
#define SSL_VERSION_LO (0x00u)
Description
SSL version number (low byte)
5.8.24.6 Building the Library
This section list the files that are available in the \src of the SSL driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.8.24.7 Library Interface
Data Types and Constants
Name Description
SSL_MODULE_CONFIG SSL layer configuration/initialization
Functions
Name Description
TCPIP_TCP_SocketIsSecuredBySSL Determines if a TCP connection is secured with SSL.
TCPIP_TCPSSL_ClientBegin Begins an SSL client session.
TCPIP_TCPSSL_ClientStart Begins an SSL client session.
TCPIP_TCPSSL_HandshakeClear Clears the SSL handshake flag.
TCPIP_TCPSSL_ListenerAdd Listens for SSL connection on a specific port.
TCPIP_TCPSSL_ServerStart Begins an SSL server session.
TCPIP_TCPSSL_StillHandshaking Determines if an SSL session is still handshaking.
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Description
This section describes the Application Programming Interface (API) functions of the SSL TCP/IP Stack.
Refer to each section for a detailed description.
5.8.24.7.1 Functions
5.8.24.7.1.1 TCPIP_TCP_SocketIsSecuredBySSL Function
C
bool TCPIP_TCP_SocketIsSecuredBySSL(
TCP_SOCKET hTCP
);
Description
Call this function to determine whether or not a TCP connection is secured with SSL.
Preconditions
TCP is initialized and hTCP is connected.
Parameters
Parameters Description
hTCP TCP connection to check
Return Values
Return Values Description
true Connection is secured via SSL
false Connection is not secured
5.8.24.7.1.2 TCPIP_TCPSSL_ClientBegin Function
C
bool TCPIP_TCPSSL_ClientBegin(
TCP_SOCKET hTCP,
uint8_t* host,
void * buffer,
uint8_t suppDataType
);
Description
This function escalates the current connection to an SSL secured connection by initiating an SSL client handshake.
Preconditions
TCP is initialized and hTCP is already connected.
Parameters
Parameters Description
hTCP TCP connection to secure
host Expected host name on certificate (currently ignored)
buffer Buffer for supplementary data return
suppDataType Type of supplementary data to copy
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Return Values
Return Values Description
true an SSL connection was initiated
false Insufficient SSL resources (stubs) were available
Remarks
The host parameter is currently ignored and is not validated.
5.8.24.7.1.3 TCPIP_TCPSSL_ClientStart Function
C
bool TCPIP_TCPSSL_ClientStart(
TCP_SOCKET hTCP,
uint8_t* host
);
Description
This function escalates the current connection to an SSL secured connection by initiating an SSL client handshake.
Preconditions
TCP is initialized and hTCP is already connected.
Parameters
Parameters Description
hTCP TCP connection to secure
host Expected host name on certificate (currently ignored)
Return Values
Return Values Description
true an SSL connection was initiated
false Insufficient SSL resources (stubs) were available
Remarks
The host parameter is currently ignored and is not validated.
5.8.24.7.1.4 TCPIP_TCPSSL_HandshakeClear Function
C
void TCPIP_TCPSSL_HandshakeClear(
TCP_SOCKET hTCP
);
Description
This function clears the flag indicating that an SSL handshake is complete.
Preconditions
TCP is initialized and hTCP is connected.
Parameters
Parameters Description
hTCP TCP connection to set
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Returns
None
Remarks
This function should never be called by an application. It is used only by the SSL module itself.
5.8.24.7.1.5 TCPIP_TCPSSL_ListenerAdd Function
C
bool TCPIP_TCPSSL_ListenerAdd(
TCP_SOCKET hTCP,
uint16_t port
);
Description
This function adds an additional listening port to a TCP connection. Connections made on this alternate port will be secured via
SSL.
Preconditions
TCP is initialized and hTCP is listening.
Parameters
Parameters Description
hTCP TCP connection to secure
port SSL port to listen on
Return Values
Return Values Description
true SSL port was added.
false The socket was not a listening socket.
5.8.24.7.1.6 TCPIP_TCPSSL_ServerStart Function
C
bool TCPIP_TCPSSL_ServerStart(
TCP_SOCKET hTCP
);
Description
This function sets up an SSL server session when a new connection is established on an SSL port.
Preconditions
TCP is initialized and hTCP is already connected.
Parameters
Parameters Description
hTCP TCP connection to secure
Return Values
Return Values Description
true an SSL connection was initiated
false Insufficient SSL resources (stubs) were available
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5.8.24.7.1.7 TCPIP_TCPSSL_StillHandshaking Function
C
bool TCPIP_TCPSSL_StillHandshaking(
TCP_SOCKET hTCP
);
Description
Call this function after calling TCPIP_TCPSSL_ClientStart until false is returned. Then your application may continue with its
normal data transfer (which is now secured).
Preconditions
TCP is initialized and hTCP is connected.
Parameters
Parameters Description
hTCP TCP connection to check
Return Values
Return Values Description
true SSL handshake is still progressing
false SSL handshake has completed
5.8.24.7.2 Data Types and Constants
5.8.24.7.2.1 SSL_MODULE_CONFIG Structure
C
typedef struct {
} SSL_MODULE_CONFIG;
Description
SSL layer configuration/initialization
5.8.24.8 Files
Files
Name Description
ssl.h
ssl_config.h SSL configuration file
Description
5.8.24.8.1 ssl.h
SSLv3 Module Headers
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Functions
Name Description
TCPIP_TCP_SocketIsSecuredBySSL Determines if a TCP connection is secured with SSL.
TCPIP_TCPSSL_ClientBegin Begins an SSL client session.
TCPIP_TCPSSL_ClientStart Begins an SSL client session.
TCPIP_TCPSSL_HandshakeClear Clears the SSL handshake flag.
TCPIP_TCPSSL_ListenerAdd Listens for SSL connection on a specific port.
TCPIP_TCPSSL_ServerStart Begins an SSL server session.
TCPIP_TCPSSL_StillHandshaking Determines if an SSL session is still handshaking.
Structures
Name Description
SSL_MODULE_CONFIG SSL layer configuration/initialization
5.8.24.8.2 ssl_config.h
Secure Sockets Layer (SSL) Configuration file
This file contains the SSL module configuration options
Macros
Name Description
SSL_MAX_BUFFERS Max # of SSL buffers (2 per socket)
SSL_MAX_CONNECTIONS Maximum number of simultaneous connections via SSL
SSL_MAX_HASHES Max # of SSL hashes (2 per socket, plus 1 to avoid deadlock)
SSL_MAX_SESSIONS Max number of cached SSL sessions
SSL_MIN_SESSION_LIFETIME Minimum lifetime for SSL Sessions Sessions cannot be reallocated until this
much time (seconds) has elapsed
SSL_MULTIPLE_INTERFACES SSL on all interfaces in a multi-homed host set to 0 to work only on one
interface
SSL_RSA_CLIENT_SIZE Size of encryption buffer, must be at least as big as the key size
SSL_RSA_KEY_SIZE Bits in SSL RSA key. This parameter is used for SSL sever connections only.
The only valid value is 512 bits (768 and 1024 bits do not work at this time).
Note, however, that SSL client operations do currently work up to 1024 bit
RSA key length.
SSL_RSA_LIFETIME_EXTENSION Lifetime extension for RSA operations Sessions lifetime is extended by this
amount (seconds) when an RSA calculation is made
SSL_VERSION Moved from MicrochipIncludeTCPIP StackSSL.h
SSL_VERSION_HI SSL version number (high byte)
SSL_VERSION_LO SSL version number (low byte)
5.8.25 TCP TCP/IP Stack Library
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5.8.25.1 Introduction
Transmission Control Protocol (TCP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the TCP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
TCP is a standard transport layer protocol described in RFC 793. It provides reliable stream-based connections over unreliable
networks, and forms the foundation for HTTP, SMTP, and many other protocol standards.
5.8.25.2 Release Notes
MPLAB Harmony Version: v0.70b TCP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.25.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.25.4 Using the Library
This topic describes the basic architecture of the TCP TCP/IP Stack Library and provides information and examples on how to
use it.
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Interface Header File: tcp.h
The interface to the TCP TCP/IP Stack library is defined in the "tcp.h" header file. This file is included by the "tcpip.h" file. Any C
language source (.c) file that uses the TCP TCP/IP Stack library should include "tcpip.h".
Library File:
The TCP TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.25.4.1 Abstraction Model
This library provides the API of the TCP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
TCP Software Abstraction Block Diagram
This module provides software abstraction of the TCP module existent in any TCP/IP Stack implementation. It removes the
overhead of address resolution from all other modules in the stack.
Typical TCP Implementation
5.8.25.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the TCP module.
Library Interface Section Description
Socket Management Functions Routines for Managing TCP Sockets
Transmit Data Transfer Functions Routines for Managing Outgoing Data Transmissions
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Receive Data Transfer Functions Routines for Managing Incoming Data Transmissions
Data Types and Constants This section provides various definitions describing This API
5.8.25.4.3 How the Library Works
Connections made over TCP guarantee data transfer at the expense of throughput. Connections are made through a three-way
handshake process, ensuring a one-to-one connection. Remote nodes advertise how much data they are ready to receive, and
all data transmitted must be acknowledged. If a remote node fails to acknowledge the receipt of data, it is automatically
retransmitted. This ensures that network errors such as lost, corrupted, or out-of-order packets are automatically corrected.
To accomplish this, TCP must operate in a buffer. Once the transmit buffer is full, no more data can be sent until the remote
node has acknowledged receipt. For the Microchip TCP/IP Stack, the application must return to the main stack loop in order for
this to happen. Likewise, the remote node cannot transmit more data until the local device has acknowledged receipt and that
space is available in the buffer. When a local application needs to read more data, it must return to the main stack loop and wait
for a new packet to arrive.
5.8.25.4.3.1 Core Functionality
The TCP flow diagram below provides an overview for the use of the TCP module:
Sockets are opened using TCPOpen . This function can either open a listening socket to wait for client connections, or can make
a client connection to the remote node. The remote node can be specified by a host name string to be resolved in DNS, an IP
address, or a NODE_INFO struct containing previously resolved IP and MAC address information.
Once connected, applications can read and write data. On each entry, the application must verify that the socket is still
connected. For most applications a call to TCPIP_TCP_IsConnected will be sufficient, but TCPIP_TCP_WasReset may also be
used for listening sockets that may turn over quickly.
To write data, call TCPIP_TCP_PutIsReady to check how much space is available. Then, call any of the TCPIP_TCP_Put family
of functions to write data as space is vailable. Once complete, call TCPIP_TCP_Flush to transmit data immediately. Alternately,
return to the main stack loop. Data will be transmitted when either a) half of the transmit buffer becomes full or b) a delay time
has passed.
To read data, call TCPIP_TCP_GetIsReady to determine how many bytes are ready to be retrieved. Then use the
TCPIP_TCP_Get family of functions to read data from the socket, and/or the TCPIP_TCP_Find family of functions to locate data
in the buffer. When no more data remains, return to the main stack loop to wait for more data to arrive.
If the application needs to close the connection, call TCPIP_TCP_Disconnect, then return to the main stack loop and wait for the
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remote node to acknowledge the disconnection. Client sockets will return to the idle state, while listening sockets will wait for a
new connection. For more information, refer to the GenericTCPClient or GenericTCPServer examples, or read the associated
RFC.
5.8.25.5 Configuring the Library
Macros
Name Description
LOCAL_TCP_PORT_END_NUMBER Last port number for randomized local port number selection
LOCAL_TCP_PORT_START_NUMBER First port number for randomized local port number selection Use the
dynamic port range defined by IANA consists of the 49152-65535
range and is meant for the selection of ephemeral ports (RFC 6056).
Adjust to your needs but stay within the IANA range
TCP_AUTO_TRANSMIT_TIMEOUT_VAL Timeout before automatically transmitting unflushed data, ms; Default
40 ms
TCP_CLOSE_WAIT_TIMEOUT Timeout for the CLOSE_WAIT state, ms
TCP_DELAYED_ACK_TIMEOUT Timeout for delayed-acknowledgement algorithm, ms
TCP_FIN_WAIT_2_TIMEOUT Timeout for FIN WAIT 2 state, ms
TCP_KEEP_ALIVE_TIMEOUT Timeout for keep-alive messages when no traffic is sent, ms
TCP_MAX_RETRIES Maximum number of retransmission attempts
TCP_MAX_SEG_SIZE_RX_LOCAL TCP Maximum Segment Size for RX (MSS). This value is advertised
during TCP connection establishment and the remote node should
obey it. The value has to be set in such a way to avoid IP layer
fragmentation from causing packet loss. However, raising its value can
enhance performance at the (small) risk of introducing incompatibility
with certain special remote nodes (ex: ones connected via a slow dial
up modem). On Ethernet networks the standard value is 1460. On
dial-up links, etc. the default values should be 536. Adjust these values
according to your network. The stack will use the local... more
TCP_MAX_SEG_SIZE_RX_NON_LOCAL Max segment size, non local
TCP_MAX_SEG_SIZE_TX TCP Maximum Segment Size for TX. The TX maximum segment size
is actually governed by the remote node's MSS option advertised
during connection establishment. However, if the remote node
specifies an unhandlably large MSS (ex: > Ethernet MTU), this define
sets a hard limit so that we don't cause any TX buffer overflows. If the
remote node does not advirtise a MSS option, all TX segments are
fixed at 536 bytes maximum.
TCP_MAX_SOCKETS The maximum number of sockets to create in the stack. When defining
TCP_MAX_SOCKETS take into account the number of interfaces the
stack is supporting
TCP_MAX_SYN_RETRIES Smaller than all other retries to reduce SYN flood DoS duration
TCP_MAX_UNACKED_KEEP_ALIVES Maximum number of keep-alive messages that can be sent without
receiving a response before automatically closing the connection
TCP_SOCKET_DEFAULT_RX_SIZE default socket Rx buffer size
TCP_SOCKET_DEFAULT_TX_SIZE default socket Tx buffer size
TCP_START_TIMEOUT_VAL TCP Timeout and retransmit numbers All timeouts in milliseconds
Timeout to retransmit unacked data, ms
TCP_TASK_TICK_RATE 5 ms default rate
TCP_WINDOW_UPDATE_TIMEOUT_VAL Timeout before automatically transmitting a window update due to a
TCPIP_TCP_Get() or TCPIP_TCP_ArrayGet() function call, ms
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Description
The configuration of the TCP/IP TCP is based on the file sys_config.h
This header file contains the configuration selection for the TCP/IP TCP. Based on the selections made, the TCP/IP TCP will
support or not support selected features. These configuration settings will apply to all instances of the TCP/IP TCP.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.25.5.1 LOCAL_TCP_PORT_END_NUMBER Macro
C
#define LOCAL_TCP_PORT_END_NUMBER (65535)
Description
Last port number for randomized local port number selection
5.8.25.5.2 LOCAL_TCP_PORT_START_NUMBER Macro
C
#define LOCAL_TCP_PORT_START_NUMBER (49152)
Description
First port number for randomized local port number selection Use the dynamic port range defined by IANA consists of the
49152-65535 range and is meant for the selection of ephemeral ports (RFC 6056). Adjust to your needs but stay within the IANA
range
5.8.25.5.3 TCP_AUTO_TRANSMIT_TIMEOUT_VAL Macro
C
#define TCP_AUTO_TRANSMIT_TIMEOUT_VAL (40ul)
Description
Timeout before automatically transmitting unflushed data, ms; Default 40 ms
5.8.25.5.4 TCP_CLOSE_WAIT_TIMEOUT Macro
C
#define TCP_CLOSE_WAIT_TIMEOUT (200ul)
Description
Timeout for the CLOSE_WAIT state, ms
5.8.25.5.5 TCP_DELAYED_ACK_TIMEOUT Macro
C
#define TCP_DELAYED_ACK_TIMEOUT (100ul)
Description
Timeout for delayed-acknowledgement algorithm, ms
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5.8.25.5.6 TCP_FIN_WAIT_2_TIMEOUT Macro
C
#define TCP_FIN_WAIT_2_TIMEOUT (5000ul)
Description
Timeout for FIN WAIT 2 state, ms
5.8.25.5.7 TCP_KEEP_ALIVE_TIMEOUT Macro
C
#define TCP_KEEP_ALIVE_TIMEOUT (10000ul)
Description
Timeout for keep-alive messages when no traffic is sent, ms
5.8.25.5.8 TCP_MAX_RETRIES Macro
C
#define TCP_MAX_RETRIES (5u)
Description
Maximum number of retransmission attempts
5.8.25.5.9 TCP_MAX_SEG_SIZE_RX_LOCAL Macro
C
#define TCP_MAX_SEG_SIZE_RX_LOCAL (1460)
Description
TCP Maximum Segment Size for RX (MSS). This value is advertised during TCP connection establishment and the remote node
should obey it. The value has to be set in such a way to avoid IP layer fragmentation from causing packet loss. However, raising
its value can enhance performance at the (small) risk of introducing incompatibility with certain special remote nodes (ex: ones
connected via a slow dial up modem). On Ethernet networks the standard value is 1460. On dial-up links, etc. the default values
should be 536. Adjust these values according to your network. The stack will use the local value for local destination networks
and the default value for nonlocal networks.
5.8.25.5.10 TCP_MAX_SEG_SIZE_RX_NON_LOCAL Macro
C
#define TCP_MAX_SEG_SIZE_RX_NON_LOCAL (536) // Max segment size, non local
Description
Max segment size, non local
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5.8.25.5.11 TCP_MAX_SEG_SIZE_TX Macro
C
#define TCP_MAX_SEG_SIZE_TX (1460u)
Description
TCP Maximum Segment Size for TX. The TX maximum segment size is actually governed by the remote node's MSS option
advertised during connection establishment. However, if the remote node specifies an unhandlably large MSS (ex: > Ethernet
MTU), this define sets a hard limit so that we don't cause any TX buffer overflows. If the remote node does not advirtise a MSS
option, all TX segments are fixed at 536 bytes maximum.
5.8.25.5.12 TCP_MAX_SOCKETS Macro
C
#define TCP_MAX_SOCKETS (10)
Description
The maximum number of sockets to create in the stack. When defining TCP_MAX_SOCKETS take into account the number of
interfaces the stack is supporting
5.8.25.5.13 TCP_MAX_SYN_RETRIES Macro
C
#define TCP_MAX_SYN_RETRIES (2u)
Description
Smaller than all other retries to reduce SYN flood DoS duration
5.8.25.5.14 TCP_MAX_UNACKED_KEEP_ALIVES Macro
C
#define TCP_MAX_UNACKED_KEEP_ALIVES (6u)
Description
Maximum number of keep-alive messages that can be sent without receiving a response before automatically closing the
connection
5.8.25.5.15 TCP_SOCKET_DEFAULT_RX_SIZE Macro
C
#define TCP_SOCKET_DEFAULT_RX_SIZE 512
Description
default socket Rx buffer size
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5.8.25.5.16 TCP_SOCKET_DEFAULT_TX_SIZE Macro
C
#define TCP_SOCKET_DEFAULT_TX_SIZE 512
Description
default socket Tx buffer size
5.8.25.5.17 TCP_START_TIMEOUT_VAL Macro
C
#define TCP_START_TIMEOUT_VAL (1000ul)
Description
TCP Timeout and retransmit numbers All timeouts in milliseconds Timeout to retransmit unacked data, ms
5.8.25.5.18 TCP_TASK_TICK_RATE Macro
C
#define TCP_TASK_TICK_RATE (5) // 5 ms default rate
Description
5 ms default rate
5.8.25.5.19 TCP_WINDOW_UPDATE_TIMEOUT_VAL Macro
C
#define TCP_WINDOW_UPDATE_TIMEOUT_VAL (200ul)
Description
Timeout before automatically transmitting a window update due to a TCPIP_TCP_Get() or TCPIP_TCP_ArrayGet() function call,
ms
5.8.25.6 Building the Library
This section list the files that are available in the \src of the TCP driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
• tcp.c
5.8.25.7 Library Interface
Data Types and Constants
Name Description
TCPIP_TCP_FifoRxFullGet TCP Get Rx First In, First Out Full
TCPIP_TCP_FifoTxFreeGet TCP Get TX First In, First Out Free
TCP_ADJUST_FLAGS TCP Adjust Falgs
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TCP_MODULE_CONFIG TCP layer configuration/initialization
TCP_OPTION_LINGER_DATA Linger options
TCP_PORT TCP Port
TCP_SOCKET TCP Socket
TCP_SOCKET_INFO TCP Socket Information
TCP_SOCKET_OPTION TCP Socket Option
INVALID_SOCKET The socket is invalid or could not be opened
Receive Data Transfer Functions
Name Description
TCPIP_TCP_ArrayFind Searches for a string in the TCP RX buffer.
TCPIP_TCP_ArrayGet Reads an array of data bytes from a TCP socket's receive FIFO. The data is
removed from the FIFO in the process.
TCPIP_TCP_ArrayPeek Reads a specified number of data bytes from the TCP RX FIFO without removing
them from the buffer.
TCPIP_TCP_Discard Discards any pending data in the TCP RX FIFO.
TCPIP_TCP_FifoSizeAdjust Adjusts the relative sizes of the RX and TX buffers.
TCPIP_TCP_Find Searches for a byte in the TCP RX buffer.
TCPIP_TCP_Get Retrieves a single byte to a TCP socket.
TCPIP_TCP_GetIsReady Determines how many bytes can be read from the TCP RX buffer.
TCPIP_TCP_Peek Peaks at one byte in the TCP RX FIFO without removing it from the buffer.
TCPIP_TCP_FifoRxFreeGet Determines how many bytes are free in the RX FIFO.
Socket Management Functions
Name Description
TCPIP_TCP_Bind Bind a socket to a local address This function is meant for unconnected server
and client sockets. It is similar to TCPIP_TCP_SocketNetSet() that assigns a
specific source interface for a socket. If localPort is 0 the stack will assign a unique
local port
TCPIP_TCP_ClientOpen Opens a TCP socket as a client.
TCPIP_TCP_Close Disconnects an open socket and destroys the socket handle, releasing the
associated resources.
TCPIP_TCP_Connect Connects a client socket.
TCPIP_TCP_Disconnect Disconnects an open socket.
TCPIP_TCP_IsConnected Determines if a socket has an established connection.
TCPIP_TCP_OptionsGet Allows getting the options for a socket like: current Rx/Tx buffer size, etc
TCPIP_TCP_OptionsSet Allows setting options to a socket like adjust Rx/Tx buffer size, etc
TCPIP_TCP_RemoteBind Bind a socket to a remote address This function is meant for unconnected server
and client sockets.
TCPIP_TCP_ServerOpen Opens a TCP socket as a server.
TCPIP_TCP_SocketInfoGet Obtains information about a currently open socket.
TCPIP_TCP_SocketNetGet Gets the MAC interface of an TCP socket
TCPIP_TCP_WasReset Self-clearing semaphore inidicating socket reset.
TCPIP_TCP_Abort Aborts a connection.
TCPIP_TCP_SocketNetSet Sets the interface for an TCP socket
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Transmit Data Transfer Functions
Name Description
TCPIP_TCP_ArrayPut Writes an array from RAM to a TCP socket.
TCPIP_TCP_FifoTxFullGet Determines how many bytes are pending in the TCP TX FIFO.
TCPIP_TCP_Flush Immediately transmits all pending TX data.
TCPIP_TCP_Put Writes a single byte to a TCP socket.
TCPIP_TCP_PutIsReady Determines how much free space is available in the TCP TX buffer.
TCPIP_TCP_StringPut Writes a null-terminated string from RAM to a TCP socket. The null-terminator is
not copied to the socket.
Description
This section describes the Application Programming Interface (API) functions of the TCP TCP/IP Stack Library.
Refer to each section for a detailed description.
5.8.25.7.1 Socket Management Functions
5.8.25.7.1.1 TCPIP_TCP_Bind Function
C
bool TCPIP_TCP_Bind(
TCP_SOCKET hTCP,
IP_ADDRESS_TYPE addType,
TCP_PORT localPort,
IP_MULTI_ADDRESS* localAddress
);
Description
Sockets don't need specific binding, it is done automatically by the stack However, specific binding can be requested using these
functions. Works for both client and server sockets.
Preconditions
TCP socket should have been opened with TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen()(). hTCP - valid socket
Parameters
Parameters Description
hTCP Socket to bind
addType The type of address being used. Example: IP_ADDRESS_TYPE_IPV4.
localPort Local port to use If 0, the stack will assign a unique local port
localAddress The local address to bind to. Could be NULL if the local address does not need to
be changed
Returns
True of success false otherwise
Remarks
The call should fail if the socket is already connected (both server and client sockets). However this is not currently implemented.
It is the user's responsibility to call this function only for sockets that are not connected. Changing the socket parameters while
the socket is connected will result in connection loss/unpredictable behavior.
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5.8.25.7.1.2 TCPIP_TCP_ClientOpen Function
C
TCP_SOCKET TCPIP_TCP_ClientOpen(
IP_ADDRESS_TYPE addType,
TCP_PORT remotePort,
IP_MULTI_ADDRESS* remoteAddress
);
Description
Provides a unified method for opening TCP client sockets.
Sockets are dynamically allocated at stack initialization, and can be claimed with this function and freed using
TCPIP_TCP_Abort or TCPIP_TCP_Close.
Preconditions
TCP is initialized.
Parameters
Parameters Description
IP_ADDRESS_TYPE addType The type of address being used. Example: IP_ADDRESS_TYPE_IPV4.
TCP_PORT remotePort TCP port to connect to. The local port for client sockets will be automatically
picked by the TCP module.
IP_MULTI_ADDRESS* remoteAddress The remote address to be used. If 0 then the address is unspecified
Returns
INVALID_SOCKET - No sockets of the specified type were available to be opened. Otherwise - A TCP_SOCKET handle. Save
this handle and use it when calling all other TCP APIs.
Remarks
IP_ADDRESS_TYPE_ANY is not supported (not a valid type for client open)!
If the remoteAddress != 0 (and the address pointed by remoteAddress != 0) then the socket will immediately initiate a connection
to the remote host
If the remoteAddress is unspecified, then no connection is initiated. Client socket parameters can be se using
TCPIP_TCP_Bind(), TCPIP_TCP_RemoteBind(), etc. calls and then connection initiated by calling TCPIP_TCP_Connect().
5.8.25.7.1.3 TCPIP_TCP_Close Function
C
void TCPIP_TCP_Close(
TCP_SOCKET hTCP
);
Description
1. If the graceful option is set for the socket (default):
• a TCPIP_TCP_Disconnect will be tried. If the linger option is set (default) the TCPIP_TCP_Disconnect will try to send any
queued TX data before issuing FIN. If the FIN send operation fails or the socket is not connected the abort is generated.
2. If the graceful option is not set, or the previous step could not send the FIN: A TCPAbort() is called, sending a RST to the
remote node. Communication is closed, the socket is no longer valid and the associated resources are freed.
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Preconditions
TCP socket should have been opened with TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen()(). hTCP - valid socket
Parameters
Parameters Description
hTCP Handle to the socket to disconnect and close.
Returns
None
5.8.25.7.1.4 TCPIP_TCP_Connect Function
C
bool TCPIP_TCP_Connect(
TCP_SOCKET hTCP
);
Description
This function will try to initiate a connection on a client socket that's not connected yet. The client socket should have been
created with a call to TCPIP_TCP_ClientOpen having the remoteAddress set to 0;
Preconditions
TCP socket should have been opened with TCPIP_TCP_ClientOpen() with an unspecified address. hTCP - valid socket
Parameters
Parameters Description
hTCP Handle to the client socket to connect.
Returns
true is the call succeeded false otherwise
Remarks
the call will fail if the client socket has no remote host specified. Use TCPIP_TCP_RemoteBind() to specify a remote host
address for the client socket.
5.8.25.7.1.5 TCPIP_TCP_Disconnect Function
C
bool TCPIP_TCP_Disconnect(
TCP_SOCKET hTCP
);
Description
This function closes the TX side of a connection by sending a FIN (if currently connected) to the remote node of the connection.
If the socket has the linger option set (default), the queued TX data transmission will be attempted before sending the FIN. If the
linger option is off, the queued TX data will be discarded.
Please note that this call may fail in which case it can be re-issued.
Preconditions
TCP socket should have been opened with TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen()(). hTCP - valid socket
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Parameters
Parameters Description
hTCP Handle of the socket to disconnect.
Returns
true if the call succeeded false otherwise; that means that the notification could not be sent to the remote host. the call can be
re-issued at a later time if desired
Remarks
If the socket is using SSL, a CLOSE_NOTIFY record will be transmitted first to allow the SSL session to be resumed at a later
time.
5.8.25.7.1.6 TCPIP_TCP_IsConnected Function
C
bool TCPIP_TCP_IsConnected(
TCP_SOCKET hTCP
);
Description
This function determines if a socket has an established connection to a remote node. Call this function after calling
TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen() to determine when the connection is set up and ready for use. This
function was historically used to check for disconnections, but TCPIP_TCP_WasReset is now a more appropriate solution.
Preconditions
TCP socket should have been opened with TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen()(). hTCP - valid socket
Parameters
Parameters Description
hTCP The socket to check.
Return Values
Return Values Description
true The socket has an established connection to a remote node.
false The socket is not currently connected.
Remarks
A socket is said to be connected only if it is in the TCP_ESTABLISHED state. Sockets in the process of opening or closing will
return false.
5.8.25.7.1.7 TCPIP_TCP_OptionsGet Function
C
bool TCPIP_TCP_OptionsGet(
TCP_SOCKET hTCP,
TCP_SOCKET_OPTION option,
void* optParam
);
Description
Various options can be get at the socket level. This function provides compatibility with BSD implementations.
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Preconditions
TCP socket should have been opened with TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen()(). hTCP - valid socket
Parameters
Parameters Description
hTCP socket to get options for
option specific option to get
optParam pointer to an area that will receive the option value; this is option dependent the
size of the area has to be large enough to accomodate the specific option
TCP_OPTION_LINGER -- pointer to a TCP_OPTION_LINGER_DATA structure
TCP_OPTION_KEEPPALIVE -- not supported yet TCP_OPTION_RX_BUFF --
size of the new RX buffer TCP_OPTION_TX_BUFF -- size of the new TX buffer
TCP_OPTION_RX_TMO -- not supported yet TCP_OPTION_TX_TMO -- not
supported yet TCP_OPTION_NODELAY -- pointer to boolean to return current NO
DELAY status TCP_OPTION_EXCLUSIVE_ADDRESS -- not supported yet
Returns
true if success false otherwise
5.8.25.7.1.8 TCPIP_TCP_OptionsSet Function
C
bool TCPIP_TCP_OptionsSet(
TCP_SOCKET hTCP,
TCP_SOCKET_OPTION option,
void* optParam
);
Description
Various options can be set at the socket level. This function provides compatibility with BSD implementations.
Preconditions
TCP socket should have been opened with TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen()(). hTCP - valid socket
Parameters
Parameters Description
hTCP socket to set options for
option specific option to be set
optParam the option value; this is option dependent TCP_OPTION_LINGER -- pointer to a
TCP_OPTION_LINGER_DATA structure TCP_OPTION_KEEPPALIVE -- not
supported yet TCP_OPTION_RX_BUFF -- size of the new RX buffer
TCP_OPTION_TX_BUFF -- size of the new TX buffer TCP_OPTION_RX_TMO --
not supported yet TCP_OPTION_TX_TMO -- not supported yet
TCP_OPTION_NODELAY -- boolean to enable/disable the NO DELAY
functionality TCP_OPTION_EXCLUSIVE_ADDRESS -- not supported yet
Returns
true if success false otherwise
5.8.25.7.1.9 TCPIP_TCP_RemoteBind Function
C
bool TCPIP_TCP_RemoteBind(
TCP_SOCKET hTCP,
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IP_ADDRESS_TYPE addType,
TCP_PORT remotePort,
IP_MULTI_ADDRESS* remoteAddress
);
Description
Sockets don't need specific remote binding, they should accept connections on any incoming interface. Thus the binding is done
automatically by the stack. However, specific remote binding can be requested using these functions. For a server socket it can
be used to restrict accepting connections from a specific remote host. For a client socket it will just change the default binding
done when the socket was opened.
Preconditions
TCP socket should have been opened with TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen()(). hTCP - valid socket
Parameters
Parameters Description
hTCP Socket to bind
addType The type of address being used. Example: IP_ADDRESS_TYPE_IPV4.
remotePort remote port to use Could be 0 if the remote port does not need to be changed
remoteAddress The remote address to bind to. Could be NULL if the remote address does not
need to be changed
Returns
True of success false otherwise
Remarks
The socket remote port is changed only if a non-zero remotePort value is passed. The socket remote host address is changed
only if a non-zero remoteAddress value is passed.
The call should fail if the socket is already connected (both server and client sockets). However this is not currently implemented.
It is the user's responsibility to call this function only for sockets that are not connected. Changing the socket parameters while
the socket is connected will result in connection loss/unpredictable behavior.
5.8.25.7.1.10 TCPIP_TCP_ServerOpen Function
C
TCP_SOCKET TCPIP_TCP_ServerOpen(
IP_ADDRESS_TYPE addType,
TCP_PORT localPort,
IP_MULTI_ADDRESS* localAddress
);
Description
Provides a unified method for opening TCP server sockets.
Sockets are statically/dynamically allocated on boot, and can be claimed with this function and freed using TCPIP_TCP_Close.
Preconditions
TCP is initialized.
Parameters
Parameters Description
IP_ADDRESS_TYPE addType The type of address being used. Example: IP_ADDRESS_TYPE_IPV4.
TCP_PORT localPort TCP port to listen on for connections.
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IP_MULTI_ADDRESS* localAddress Local address to use.
Returns
INVALID_SOCKET - No sockets of the specified type were available to be opened. Otherwise - A TCP_SOCKET handle. Save
this handle and use it when calling all other TCP APIs.
5.8.25.7.1.11 TCPIP_TCP_SocketInfoGet Function
C
bool TCPIP_TCP_SocketInfoGet(
TCP_SOCKET hTCP,
TCP_SOCKET_INFO* pInfo
);
Description
Fills the provided TCP_SOCKET_INFO structure associated with this socket. This contains the NODE_INFO structure with IP
and MAC address (or gateway MAC) and the remote port.
Preconditions
TCP is initialized and the socket is connected.
Parameters
Parameters Description
hTCP The socket to check.
Returns
true if the call succeeded false if no such socket or the socket is not opened
5.8.25.7.1.12 TCPIP_TCP_SocketNetGet Function
C
TCPIP_NET_HANDLE TCPIP_TCP_SocketNetGet(
TCP_SOCKET hTCP
);
Description
This function returns the interface handle of an TCP socket
Preconditions
TCP socket should have been opened with _TCP_Open(). hTCP - valid socket
Parameters
Parameters Description
hTCP The TCP socket
Returns
the handle of the local interface this socket is bound to.
5.8.25.7.1.13 TCPIP_TCP_WasReset Function
C
bool TCPIP_TCP_WasReset(
TCP_SOCKET hTCP
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);
Description
This function is a self-clearing semaphore indicating whether or not a socket has been disconnected since the previous call. This
function works for all possible disconnections: a call to TCPIP_TCP_Disconnect, a FIN from the remote node, or an
acknowledgement timeout caused by the loss of a network link. It also returns true after the first call to TCPIP_TCP_Initialize.
Applications should use this function to reset their state machines.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket to check.
Return Values
Return Values Description
true The socket has been disconnected since the previous call.
false The socket has not been disconnected since the previous call.
5.8.25.7.1.14 TCPIP_TCP_Abort Function
C
void TCPIP_TCP_Abort(
TCP_SOCKET hTCP,
bool killSocket
);
Description
This function aborts a connection to a remote node by sending a RST (if currently connected). Any pending TX/RX data is
discarded.
A client socket will always be closed and the associated resources released. The socket cannot be used again after this call.
A server socket will abort the current connection:
• if killSocket == false the socket will remain listening
• if killSocket == true the socket will be closed and all associated resources released. The socket cannot be used again after
this call.
Preconditions
TCP socket should have been opened with TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen()(). hTCP - valid socket
Parameters
Parameters Description
hTCP Handle to the socket to disconnect.
killSocket if true, it kills a server socket
Returns
None
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5.8.25.7.1.15 TCPIP_TCP_SocketNetSet Function
C
bool TCPIP_TCP_SocketNetSet(
TCP_SOCKET hTCP,
TCPIP_NET_HANDLE hNet
);
Description
This function sets the network interface for an TCP socket
Preconditions
TCP socket should have been opened with _TCP_Open(). hTCP - valid socket
Parameters
Parameters Description
hTCP The TCP socket
hNet interface handle.
Returns
true if success false otherwise.
Remarks
None
5.8.25.7.2 Transmit Data Transfer Functions
5.8.25.7.2.1 TCPIP_TCP_ArrayPut Function
C
uint16_t TCPIP_TCP_ArrayPut(
TCP_SOCKET hTCP,
const uint8_t* Data,
uint16_t Len
);
Description
Writes an array from RAM to a TCP socket.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket to which data is to be written.
data Pointer to the array to be written.
len Number of bytes to be written.
Returns
The number of bytes written to the socket. If less than len, the buffer became full or the socket is not conected.
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5.8.25.7.2.2 TCPIP_TCP_FifoTxFullGet Function
C
uint16_t TCPIP_TCP_FifoTxFullGet(
TCP_SOCKET hTCP
);
Description
Determines how many bytes are pending in the TCP TX FIFO.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket to check.
Returns
Number of bytes pending to be flushed in the TCP TX FIFO.
5.8.25.7.2.3 TCPIP_TCP_Flush Function
C
bool TCPIP_TCP_Flush(
TCP_SOCKET hTCP
);
Description
This function immediately transmits all pending TX data with a PSH flag. If this function is not called, data will automatically be
sent when either a) the TX buffer is half full or b) the TCP_AUTO_TRANSMIT_TIMEOUT_VAL (default: 40ms) has elapsed.
Preconditions
TCP is initialized and the socket is connected.
Parameters
Parameters Description
hTCP The socket whose data is to be transmitted.
Returns
None
Remarks
SSL application data is automatically flushed, so this function has no effect for SSL sockets.
5.8.25.7.2.4 TCPIP_TCP_Put Function
C
uint16_t TCPIP_TCP_Put(
TCP_SOCKET hTCP,
uint8_t byte
);
Description
Writes a single byte to a TCP socket.
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Preconditions
TCP socket should have been opened with TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen()(). hTCP - valid socket
Parameters
Parameters Description
hTCP The socket to which data is to be written.
byte The byte to write.
Return Values
Return Values Description
0 The byte was written to the transmit buffer.
1 The transmit buffer was full, or the socket is not connected.
Remarks
Note that the following function is inefficient. A buffered approach (TCPIP_TCP_ArrayPut) should be preferred
5.8.25.7.2.5 TCPIP_TCP_PutIsReady Function
C
uint16_t TCPIP_TCP_PutIsReady(
TCP_SOCKET hTCP
);
Description
Call this function to determine how many bytes can be written to the TCP TX buffer. If this function returns zero, the application
must return to the main stack loop before continuing in order to transmit more data.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket to check.
Returns
The number of bytes available to be written in the TCP TX buffer.
5.8.25.7.2.6 TCPIP_TCP_StringPut Function
C
const uint8_t* TCPIP_TCP_StringPut(
TCP_SOCKET hTCP,
const uint8_t* Data
);
Description
Writes a null-terminated string from RAM to a TCP socket. The null-terminator is not copied to the socket.
Preconditions
TCP is initialized.
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Parameters
Parameters Description
hTCP The socket to which data is to be written.
data Pointer to the string to be written.
Returns
Pointer to the byte following the last byte written to the socket. If this pointer does not dereference to a NUL byte, the buffer
became full or the socket is not connected.
Remarks
The return value of this function differs from that of TCPIP_TCP_ArrayPut. To write long strings in a single state, initialize the
*data pointer to the first byte, then call this function repeatedly (breaking to the main stack loop after each call) until the return
value dereferences to a NUL byte. Save the return value as the new starting *data pointer otherwise.
5.8.25.7.3 Receive Data Transfer Functions
5.8.25.7.3.1 TCPIP_TCP_ArrayFind Function
C
uint16_t TCPIP_TCP_ArrayFind(
TCP_SOCKET hTCP,
const uint8_t* cFindArray,
uint16_t wLen,
uint16_t wStart,
uint16_t wSearchLen,
bool bTextCompare
);
Description
This function finds the first occurrance of an array of bytes in the TCP RX buffer. It can be used by an application to abstract
searches out of their own application code. For increased efficiency, the function is capable of limiting the scope of search to a
specific range of bytes. It can also perform a case-insensitive search if required.
For example, if the buffer contains "I love PIC MCUs!" and the search array is "love" with a length of 4, a value of 2 will be
returned.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket to search within.
cFindArray The array of bytes to find in the buffer.
wLen Length of cFindArray.
wStart Zero-indexed starting position within the buffer.
wSearchLen Length from wStart to search in the buffer.
bTextCompare true for case-insensitive text search, false for binary search
Return Values
Return Values Description
0xFFFF Search array not found
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Otherwise Zero-indexed position of the first occurrance
Remarks
Since this function usually must transfer data from external storage to internal RAM for comparison, its performance degrades
significantly when the buffer is full and the array is not found. For better performance, try to search for characters that are
expected to exist or limit the scope of the search as much as possible. The HTTP module, for example, uses this function to
parse headers. However, it searches for newlines, then the separating colon, then reads the header name to RAM for final
comparison. This has proven to be significantly faster than searching for full header name strings outright.
5.8.25.7.3.2 TCPIP_TCP_ArrayGet Function
C
uint16_t TCPIP_TCP_ArrayGet(
TCP_SOCKET hTCP,
uint8_t* buffer,
uint16_t count
);
Description
Reads an array of data bytes from a TCP socket's receive FIFO. The data is removed from the FIFO in the process.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket from which data is to be read.
buffer Pointer to the array to store data that was read.
len Number of bytes to be read.
Returns
The number of bytes read from the socket. If less than len, the RX FIFO buffer became empty or the socket is not conected.
5.8.25.7.3.3 TCPIP_TCP_ArrayPeek Function
C
uint16_t TCPIP_TCP_ArrayPeek(
TCP_SOCKET hTCP,
uint8_t * vBuffer,
uint16_t wLen,
uint16_t wStart
);
Description
Reads a specified number of data bytes from the TCP RX FIFO without removing them from the buffer. No TCP control actions
are taken as a result of this function (ex: no window update is sent to the remote node).
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket to peak from (read without removing from stream).
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vBuffer Destination to write the peeked data bytes.
wLen Length of bytes to peak from the RX FIFO and copy to vBuffer.
wStart Zero-indexed starting position within the FIFO to start peeking from.
Remarks
None
5.8.25.7.3.4 TCPIP_TCP_Discard Function
C
uint16_t TCPIP_TCP_Discard(
TCP_SOCKET hTCP
);
Description
Discards any pending data in the TCP RX FIFO.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket whose RX FIFO is to be cleared.
Returns
Number of bytes that have been discarded from the RX buffer.
5.8.25.7.3.5 TCPIP_TCP_FifoSizeAdjust Function
C
bool TCPIP_TCP_FifoSizeAdjust(
TCP_SOCKET hTCP,
uint16_t wMinRXSize,
uint16_t wMinTXSize,
TCP_ADJUST_FLAGS vFlags
);
Description
This function can be used to simultaneously adjust the sizes of the RX and TX FIFOs.
Adjusting the size of the TX/RX FIFO on the fly can allow for optimal transmission speed for one-sided application protocols. For
example, HTTP typically begins by receiving large amounts of data from the client, then switches to serving large amounts of
data back. Adjusting the FIFO at these points can increase performance in systems that have limited resources. Once the FIFOs
are adjusted, a window update is sent.
The TCP_ADJUST_FLAGS control the distribution of the remaining available space between the TX and RX FIFOs. If neither or
both of TCP_ADJUST_GIVE_REST_TO_TX and TCP_ADJUST_GIVE_REST_TO_RX are set, the function distributes the
remaining space (if any) equally. If the new requested FIFOs space is greater that the old existing FIFOs space the
TCP_ADJUST_GIVE_REST_TO_TX and TCP_ADJUST_GIVE_REST_TO_RX are ignored.
TCP_ADJUST_PRESERVE_RX and TCP_ADJUST_PRESERVE_TX request the preserving of the existing data. Existing data
can be preserved as long as the old data in the buffer does not exceed the capacity of the new buffer.
Preconditions
TCP is initialized.
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Parameters
Parameters Description
hTCP The socket to be adjusted
wMinRXSize Minimum number of bytes for the RX FIFO
wMinTXSize Minimum number of bytes for the TX FIFO
vFlags If TCP_ADJUST_TX_ONLY or TCP_ADJUST_RX_ONLY are not set, then the TX
and RX bufferrs are evaluated together and any
5.8.25.7.3.6 TCPIP_TCP_Find Function
C
uint16_t TCPIP_TCP_Find(
TCP_SOCKET hTCP,
uint8_t cFind,
uint16_t wStart,
uint16_t wSearchLen,
bool bTextCompare
);
Description
This function finds the first occurrance of a byte in the TCP RX buffer. It can be used by an application to abstract searches out
of their own application code. For increased efficiency, the function is capable of limiting the scope of search to a specific range
of bytes. It can also perform a case-insensitive search if required.
For example, if the buffer contains "I love PIC MCUs!" and the cFind byte is ' ', a value of 1 will be returned.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket to search within.
cFind The byte to find in the buffer.
wStart Zero-indexed starting position within the buffer.
wSearchLen Length from wStart to search in the buffer.
bTextCompare true for case-insensitive text search, false for binary search
Return Values
Return Values Description
0xFFFF Search array not found
Otherwise Zero-indexed position of the first occurrance
Remarks
Since this function usually must transfer data from external storage to internal RAM for comparison, its performance degrades
significantly when the buffer is full and the array is not found. For better performance, try to search for characters that are
expected to exist or limit the scope of the search as much as possible. The HTTP module, for example, uses this function to
parse headers. However, it searches for newlines, then the separating colon, then reads the header name to RAM for final
comparison. This has proven to be significantly faster than searching for full header name strings outright.
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5.8.25.7.3.7 TCPIP_TCP_Get Function
C
uint16_t TCPIP_TCP_Get(
TCP_SOCKET hTCP,
uint8_t* byte
);
Description
Retrieves a single byte to a TCP socket.
Preconditions
TCP socket should have been opened with TCPIP_TCP_ServerOpen()/TCPIP_TCP_ClientOpen()(). hTCP - valid socket
Parameters
Parameters Description
hTCP The socket from which to read.
byte Pointer to location in which the read byte should be stored.
Return Values
Return Values Description
1 A byte was read from the buffer.
0 The buffer was empty, or the socket is not connected.
Remarks
Note that the following function is inefficient. A buffered approach (TCPIP_TCP_ArrayGet) should be preferred
5.8.25.7.3.8 TCPIP_TCP_GetIsReady Function
C
uint16_t TCPIP_TCP_GetIsReady(
TCP_SOCKET hTCP
);
Description
Call this function to determine how many bytes can be read from the TCP RX buffer. If this function returns zero, the application
must return to the main stack loop before continuing in order to wait for more data to arrive.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket to check.
Returns
The number of bytes available to be read from the TCP RX buffer.
5.8.25.7.3.9 TCPIP_TCP_Peek Function
C
uint8_t TCPIP_TCP_Peek(
TCP_SOCKET hTCP,
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uint16_t wStart
);
Description
Peaks at one byte in the TCP RX FIFO without removing it from the buffer.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket to peak from (read without removing from stream).
wStart Zero-indexed starting position within the FIFO to peek from.
Remarks
Use the TCPIP_TCP_ArrayPeek() function to read more than one byte. It will perform better than calling TCPIP_TCP_Peek() in
a loop.
5.8.25.7.3.10 TCPIP_TCP_FifoRxFreeGet Function
C
uint16_t TCPIP_TCP_FifoRxFreeGet(
TCP_SOCKET hTCP
);
Description
Determines how many bytes are free in the RX FIFO.
Preconditions
TCP is initialized.
Parameters
Parameters Description
hTCP The socket to check.
Returns
The number of bytes free in the TCP RX FIFO. If zero, no additional data can be received until the application removes some
data using one of the TCPIP_TCP_Get family functions.
5.8.25.7.4 Data Types and Constants
5.8.25.7.4.1 TCPIP_TCP_FifoRxFullGet Macro
C
#define TCPIP_TCP_FifoRxFullGet(a) TCPIP_TCP_GetIsReady(a)
Description
Macro: TCPIP_TCP_FifoRxFullGet
Alias to TCPIP_TCP_GetIsReady provided for API completeness
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5.8.25.7.4.2 TCPIP_TCP_FifoTxFreeGet Macro
C
#define TCPIP_TCP_FifoTxFreeGet(a) TCPIP_TCP_PutIsReady(a)
Description
Macro: TCPIP_TCP_FifoTxFreeGet(TCP_SOCKET hTCP)
Alias to TCPIP_TCP_PutIsReady provided for API completeness
Parameters
Parameters Description
hTCP The socket to check.
Returns
The number of bytes available to be written in the TCP TX buffer.
5.8.25.7.4.3 TCP_ADJUST_FLAGS Enumeration
C
typedef enum {
TCP_ADJUST_GIVE_REST_TO_RX = 0x01,
TCP_ADJUST_GIVE_REST_TO_TX = 0x02,
TCP_ADJUST_PRESERVE_RX = 0x04,
TCP_ADJUST_PRESERVE_TX = 0x08,
TCP_ADJUST_TX_ONLY = 0x10,
TCP_ADJUST_RX_ONLY = 0x20
} TCP_ADJUST_FLAGS;
Description
Enumeration: TCP_ADJUST_FLAGS
Adjust socket buffer sizes.
Members
Members Description
TCP_ADJUST_GIVE_REST_TO_RX =
0x01
Resize flag: extra bytes go to RX
TCP_ADJUST_GIVE_REST_TO_TX =
0x02
Resize flag: extra bytes go to TX
TCP_ADJUST_PRESERVE_RX = 0x04 Resize flag: attempt to preserve RX buffer
TCP_ADJUST_PRESERVE_TX = 0x08 Resize flag: attempt to preserve TX buffer
TCP_ADJUST_TX_ONLY = 0x10 Resize flag: adjust the TX buffer only
TCP_ADJUST_RX_ONLY = 0x20 Resize flag: adjust the RX buffer only
5.8.25.7.4.4 TCP_MODULE_CONFIG Structure
C
typedef struct {
int nSockets;
uint16_t sktTxBuffSize;
uint16_t sktRxBuffSize;
} TCP_MODULE_CONFIG;
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Description
Structure: TCP_MODULE_CONFIG
TCP layer configuration/initialization
Members
Members Description
int nSockets; number of sockets to be created
uint16_t sktTxBuffSize; size of the socket tx buffer
uint16_t sktRxBuffSize; size of the socket rx buffer
5.8.25.7.4.5 TCP_OPTION_LINGER_DATA Structure
C
typedef struct {
bool lingerEnable;
bool gracefulEnable;
uint16_t lingerTmo;
} TCP_OPTION_LINGER_DATA;
Description
Structure: TCP_OPTION_LINGER_DATA
Linger options
Members
Members Description
bool lingerEnable; enable/disable linger; enabled by default for any socket
bool gracefulEnable; enable/disable graceful close; enabled by default for any socket
uint16_t lingerTmo; linger timeout in seconds (when enabled) this option is not supported yet
5.8.25.7.4.6 TCP_PORT Type
C
typedef uint16_t TCP_PORT;
Description
Type: TCP_PORT
TCP Port Number identifier
5.8.25.7.4.7 TCP_SOCKET Type
C
typedef int16_t TCP_SOCKET;
Description
Type: TCP_SOCKET
A TCP_SOCKET is stored as a single uint8_t
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5.8.25.7.4.8 TCP_SOCKET_INFO Structure
C
typedef struct {
IP_ADDRESS_TYPE addressType;
IP_MULTI_ADDRESS remoteIPaddress;
IP_MULTI_ADDRESS localIPaddress;
TCP_PORT remotePort;
TCP_PORT localPort;
} TCP_SOCKET_INFO;
Description
Structure: TCP_SOCKET_INFO
Information about a socket
Members
Members Description
TCP_PORT remotePort; Port number associated with remote node
TCP_PORT localPort; local port number
5.8.25.7.4.9 TCP_SOCKET_OPTION Enumeration
C
typedef enum {
TCP_OPTION_LINGER,
TCP_OPTION_KEEPPALIVE,
TCP_OPTION_RX_BUFF,
TCP_OPTION_TX_BUFF,
TCP_OPTION_RX_TMO,
TCP_OPTION_TX_TMO,
TCP_OPTION_NODELAY,
TCP_OPTION_EXCLUSIVE_ADDRESS
} TCP_SOCKET_OPTION;
Description
Enumeration: TCP_SOCKET_OPTION
Socket options
Members
Members Description
TCP_OPTION_LINGER The LINGER option controls the action taken when unsent data is queued on a
socket and the socket is closed. The linger option can be turned on/off and the
timeout can be specified.
TCP_OPTION_KEEPPALIVE enable the use of keep-alive packets on TCP connections The option can be
turned on/off and the timeout can be specified
TCP_OPTION_RX_BUFF request different RX buffer size. Has to call TCPIP_TCP_OptionsGet to see the
exact space allocated
TCP_OPTION_TX_BUFF request different TX buffer size. Has to call TCPIP_TCP_OptionsGet to see the
exact space allocated
TCP_OPTION_RX_TMO specifies the RX timeout. If no data arrives in the specified timeout the socket is
closed
TCP_OPTION_TX_TMO specifies the TX timeout. If no data can be sent in the specified timeout the socket
is closed
TCP_OPTION_NODELAY enables the NO DELAY/Nagle algorithm functionality;
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TCP_OPTION_EXCLUSIVE_ADDRESS enables a socket to be bound for exclusive access.
5.8.25.7.4.10 INVALID_SOCKET Macro
C
#define INVALID_SOCKET (-1) // The socket is invalid or could not be opened
Description
The socket is invalid or could not be opened
5.8.25.8 Files
Files
Name Description
tcp.h Transmission Control Protocol (TCP) Communications Layer API
tcp_config.h TCP configuration file
Description
5.8.25.8.1 tcp.h
• Provides reliable, handshaked transport of application stream oriented data with flow control
• Reference: RFC 793
Enumerations
Name Description
TCP_ADJUST_FLAGS TCP Adjust Falgs
TCP_SOCKET_OPTION TCP Socket Option
Functions
Name Description
TCPIP_TCP_Abort Aborts a connection.
TCPIP_TCP_ArrayFind Searches for a string in the TCP RX buffer.
TCPIP_TCP_ArrayGet Reads an array of data bytes from a TCP socket's receive FIFO. The data is
removed from the FIFO in the process.
TCPIP_TCP_ArrayPeek Reads a specified number of data bytes from the TCP RX FIFO without removing
them from the buffer.
TCPIP_TCP_ArrayPut Writes an array from RAM to a TCP socket.
TCPIP_TCP_Bind Bind a socket to a local address This function is meant for unconnected server
and client sockets. It is similar to TCPIP_TCP_SocketNetSet() that assigns a
specific source interface for a socket. If localPort is 0 the stack will assign a unique
local port
TCPIP_TCP_ClientOpen Opens a TCP socket as a client.
TCPIP_TCP_Close Disconnects an open socket and destroys the socket handle, releasing the
associated resources.
TCPIP_TCP_Connect Connects a client socket.
TCPIP_TCP_Discard Discards any pending data in the TCP RX FIFO.
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TCPIP_TCP_Disconnect Disconnects an open socket.
TCPIP_TCP_FifoRxFreeGet Determines how many bytes are free in the RX FIFO.
TCPIP_TCP_FifoSizeAdjust Adjusts the relative sizes of the RX and TX buffers.
TCPIP_TCP_FifoTxFullGet Determines how many bytes are pending in the TCP TX FIFO.
TCPIP_TCP_Find Searches for a byte in the TCP RX buffer.
TCPIP_TCP_Flush Immediately transmits all pending TX data.
TCPIP_TCP_Get Retrieves a single byte to a TCP socket.
TCPIP_TCP_GetIsReady Determines how many bytes can be read from the TCP RX buffer.
TCPIP_TCP_IsConnected Determines if a socket has an established connection.
TCPIP_TCP_OptionsGet Allows getting the options for a socket like: current Rx/Tx buffer size, etc
TCPIP_TCP_OptionsSet Allows setting options to a socket like adjust Rx/Tx buffer size, etc
TCPIP_TCP_Peek Peaks at one byte in the TCP RX FIFO without removing it from the buffer.
TCPIP_TCP_Put Writes a single byte to a TCP socket.
TCPIP_TCP_PutIsReady Determines how much free space is available in the TCP TX buffer.
TCPIP_TCP_RemoteBind Bind a socket to a remote address This function is meant for unconnected server
and client sockets.
TCPIP_TCP_ServerOpen Opens a TCP socket as a server.
TCPIP_TCP_SocketInfoGet Obtains information about a currently open socket.
TCPIP_TCP_SocketNetGet Gets the MAC interface of an TCP socket
TCPIP_TCP_SocketNetSet Sets the interface for an TCP socket
TCPIP_TCP_StringPut Writes a null-terminated string from RAM to a TCP socket. The null-terminator is
not copied to the socket.
TCPIP_TCP_WasReset Self-clearing semaphore inidicating socket reset.
Macros
Name Description
INVALID_SOCKET The socket is invalid or could not be opened
TCPIP_TCP_FifoRxFullGet TCP Get Rx First In, First Out Full
TCPIP_TCP_FifoTxFreeGet TCP Get TX First In, First Out Free
Structures
Name Description
TCP_MODULE_CONFIG TCP layer configuration/initialization
TCP_OPTION_LINGER_DATA Linger options
TCP_SOCKET_INFO TCP Socket Information
Types
Name Description
TCP_PORT TCP Port
TCP_SOCKET TCP Socket
File Name
tcp.h
Company
Microchip Technology Incorporated
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5.8.25.8.2 tcp_config.h
Transmission Control Protocol (TCP) Configuration file
This file contains the TCP module configuration options
Macros
Name Description
LOCAL_TCP_PORT_END_NUMBER Last port number for randomized local port number selection
LOCAL_TCP_PORT_START_NUMBER First port number for randomized local port number selection Use the
dynamic port range defined by IANA consists of the 49152-65535
range and is meant for the selection of ephemeral ports (RFC 6056).
Adjust to your needs but stay within the IANA range
TCP_AUTO_TRANSMIT_TIMEOUT_VAL Timeout before automatically transmitting unflushed data, ms; Default
40 ms
TCP_CLOSE_WAIT_TIMEOUT Timeout for the CLOSE_WAIT state, ms
TCP_DELAYED_ACK_TIMEOUT Timeout for delayed-acknowledgement algorithm, ms
TCP_FIN_WAIT_2_TIMEOUT Timeout for FIN WAIT 2 state, ms
TCP_KEEP_ALIVE_TIMEOUT Timeout for keep-alive messages when no traffic is sent, ms
TCP_MAX_RETRIES Maximum number of retransmission attempts
TCP_MAX_SEG_SIZE_RX_LOCAL TCP Maximum Segment Size for RX (MSS). This value is advertised
during TCP connection establishment and the remote node should
obey it. The value has to be set in such a way to avoid IP layer
fragmentation from causing packet loss. However, raising its value can
enhance performance at the (small) risk of introducing incompatibility
with certain special remote nodes (ex: ones connected via a slow dial
up modem). On Ethernet networks the standard value is 1460. On
dial-up links, etc. the default values should be 536. Adjust these values
according to your network. The stack will use the local... more
TCP_MAX_SEG_SIZE_RX_NON_LOCAL Max segment size, non local
TCP_MAX_SEG_SIZE_TX TCP Maximum Segment Size for TX. The TX maximum segment size
is actually governed by the remote node's MSS option advertised
during connection establishment. However, if the remote node
specifies an unhandlably large MSS (ex: > Ethernet MTU), this define
sets a hard limit so that we don't cause any TX buffer overflows. If the
remote node does not advirtise a MSS option, all TX segments are
fixed at 536 bytes maximum.
TCP_MAX_SOCKETS The maximum number of sockets to create in the stack. When defining
TCP_MAX_SOCKETS take into account the number of interfaces the
stack is supporting
TCP_MAX_SYN_RETRIES Smaller than all other retries to reduce SYN flood DoS duration
TCP_MAX_UNACKED_KEEP_ALIVES Maximum number of keep-alive messages that can be sent without
receiving a response before automatically closing the connection
TCP_SOCKET_DEFAULT_RX_SIZE default socket Rx buffer size
TCP_SOCKET_DEFAULT_TX_SIZE default socket Tx buffer size
TCP_START_TIMEOUT_VAL TCP Timeout and retransmit numbers All timeouts in milliseconds
Timeout to retransmit unacked data, ms
TCP_TASK_TICK_RATE 5 ms default rate
TCP_WINDOW_UPDATE_TIMEOUT_VAL Timeout before automatically transmitting a window update due to a
TCPIP_TCP_Get() or TCPIP_TCP_ArrayGet() function call, ms
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5.8.26 Telnet TCP/IP Stack Library
5.8.26.1 Introduction
Telnet TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the Telnet TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
Telnet provides bidirectional, interactive communication between two nodes on the Internet or on a Local Area Network. The
sTelnet code included with Microchip's TCP/IP stack is a demonstration of the structure of a Telnet application. This demo
begins by listening for a Telnet connection. When a client attempts to make one, the demo will prompt the client for a username
and password, and if the correct one is provided, will output and periodically refresh several values obtained from the demo
board.
There are several changes that you may need to make to Telnet.c and/or Telnet.h to suit your application. All of the Telnet Public
members can be re-defined in the application-specific section of TCPIPConfig.h. You may also wish to change some of the
Telnet Internal Member strings, located in Telnet.c, to more accurately reflect your application. You will also need to modify the
TelnetTask ( see page 574) function to include the functionality you'd like. You may insert or change states in TelnetTask ( see
page 574) as needed.
5.8.26.2 Release Notes
MPLAB Harmony Version: v0.70b Telnet TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.26.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.26.4 Using the Library
This topic describes the basic architecture of the Telnet TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: telnet.h
The interface to the Telnet TCP/IP Stack library is defined in the "telnet.h" header file. This file is included by the "tcpip.h" file.
Any C language source (.c) file that uses the Telnet TCP/IP Stack library should include "tcpip.h".
Library File:
The Telnet TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.26.4.1 Abstraction Model
This library provides the API of the Telnet TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
Telnet Software Abstraction Block Diagram
Note: This image was not available at time of release and will be added in a future release of MPLAB Harmony.
5.8.26.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Telnet module.
Library Interface Section Description
Data Types and Constants This section provides various definitions describing this API
5.8.26.5 Configuring the Library
Macros
Name Description
MAX_TELNET_CONNECTIONS Maximum number of Telnet connections
TELNET_PASSWORD Default Telnet password
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TELNET_PORT Unsecured Telnet port
TELNET_USERNAME Default Telnet user name
TELNETS_PORT SSL Secured Telnet port (ignored if TCPIP_STACK_USE_SSL_SERVER is
undefined)
Description
The configuration of the Telnet TCP/IP Stack Library is based on the file tcpip_config.h
This header file contains the configuration selection for the Telnet TCP/IP Stack Library. Based on the selections made, the
Telnet TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all instances
of the Telnet TCP/IP Stack Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.26.5.1 MAX_TELNET_CONNECTIONS Macro
C
#define MAX_TELNET_CONNECTIONS (2u)
Description
Maximum number of Telnet connections
5.8.26.5.2 TELNET_PASSWORD Macro
C
#define TELNET_PASSWORD "microchip"
Description
Default Telnet password
5.8.26.5.3 TELNET_PORT Macro
C
#define TELNET_PORT 23
Description
Unsecured Telnet port
5.8.26.5.4 TELNET_USERNAME Macro
C
#define TELNET_USERNAME "admin"
Description
Default Telnet user name
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5.8.26.5.5 TELNETS_PORT Macro
C
#define TELNETS_PORT 992
Description
SSL Secured Telnet port (ignored if TCPIP_STACK_USE_SSL_SERVER is undefined)
5.8.26.6 Building the Library
This section list the files that are available in the \src of the Telnet driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.8.26.7 Library Interface
Data Types and Constants
Name Description
TELNET_MODULE_CONFIG Telnet Configuration structure placeholder
Description
There are no user accessible functions in this interface. There is only a place holder for Telnet module configuration.
5.8.26.7.1 Data Types and Constants
5.8.26.7.1.1 TELNET_MODULE_CONFIG Structure
C
typedef struct {
} TELNET_MODULE_CONFIG;
Description
Telnet Configuration structure placeholder
5.8.26.8 Files
Files
Name Description
telnet.h
telnet_config.h Configuration file
Description
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5.8.26.8.1 telnet.h
Telnet Server Module for Microchip TCP/IP Stack
-Listens on TCP Port 23
Structures
Name Description
TELNET_MODULE_CONFIG Telnet Configuration structure placeholder
5.8.26.8.2 telnet_config.h
Telnet Configuration file
This file contains the Telnet module configuration options
Macros
Name Description
MAX_TELNET_CONNECTIONS Maximum number of Telnet connections
TELNET_PASSWORD Default Telnet password
TELNET_PORT Unsecured Telnet port
TELNET_USERNAME Default Telnet user name
TELNETS_PORT SSL Secured Telnet port (ignored if TCPIP_STACK_USE_SSL_SERVER is
undefined)
5.8.27 TFTP TCP/IP Stack Library
5.8.27.1 Introduction
Trivial File Transfer Protocol (TFTP) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the TFTP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
The Trivial File Transfer Protocol provides unreliable upload and download services to applications connected to the
UDP-based TFTP server.
5.8.27.2 Release Notes
MPLAB Harmony Version: v0.70b TFTP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
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New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.27.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.27.4 Using the Library
This topic describes the basic architecture of the TFTP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: tftpc.h
The interface to the TFTP TCP/IP Stack library is defined in the "tftpc.h" header file. This file is included by the "tcpip.h" file. Any
C language source (.c) file that uses the tftpc.h TCP/IP Stack library should include "tcpip.h".
Library File:
The TFTP TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.27.4.1 Abstraction Model
This library provides the API of the TFTP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
TFTP Software Abstraction Block Diagram
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5.8.27.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the TFTP module.
Library Interface Section Description
General Functions This section provides general interface routines to TFTP
Data Types and Constants This section provides various definitions describing this API
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5.8.27.5 Configuring the Library
Macros
Name Description
TFTP_ARP_TIMEOUT_VAL Number of seconds to wait before declaring TIMEOUT error on Put, seconds
TFTP_BLOCK_SIZE The size of a TFTP block - 512 bytes
TFTP_BLOCK_SIZE_MSB The MSB of the TFTP_BLOCK_SIZE
TFTP_CLIENT_PORT The TFTP Client port - a unique port on this device
TFTP_GET_TIMEOUT_VAL Number of seconds to wait before declaring TIMEOUT error on Get, seconds.
TFTP_MAX_RETRIES Number of attempts before declaring TIMEOUT error.
TFTP_SERVER_PORT The TFTP Server Port
Description
The configuration of the TFTP TCP/IP Stack Library is based on the file tcpip_config.h
This header file contains the configuration selection for the TFTP TCP/IP Stack Library. Based on the selections made, the TFTP
TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all instances of the
TFTP TCP/IP Stack Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.27.5.1 TFTP_ARP_TIMEOUT_VAL Macro
C
#define TFTP_ARP_TIMEOUT_VAL (3ul)
Description
Number of seconds to wait before declaring TIMEOUT error on Put, seconds
5.8.27.5.2 TFTP_BLOCK_SIZE Macro
C
#define TFTP_BLOCK_SIZE (0x200L)
Description
The size of a TFTP block - 512 bytes
5.8.27.5.3 TFTP_BLOCK_SIZE_MSB Macro
C
#define TFTP_BLOCK_SIZE_MSB (0x02u)
Description
The MSB of the TFTP_BLOCK_SIZE
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5.8.27.5.4 TFTP_CLIENT_PORT Macro
C
#define TFTP_CLIENT_PORT 65352L
Description
The TFTP Client port - a unique port on this device
5.8.27.5.5 TFTP_GET_TIMEOUT_VAL Macro
C
#define TFTP_GET_TIMEOUT_VAL (3ul)
Description
Number of seconds to wait before declaring TIMEOUT error on Get, seconds.
5.8.27.5.6 TFTP_MAX_RETRIES Macro
C
#define TFTP_MAX_RETRIES (3u)
Description
Number of attempts before declaring TIMEOUT error.
5.8.27.5.7 TFTP_SERVER_PORT Macro
C
#define TFTP_SERVER_PORT (69L)
Description
The TFTP Server Port
5.8.27.6 Building the Library
This section list the files that are available in the \src of the TFTP driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
5.8.27.7 Library Interface
Data Types and Constants
Name Description
TFTP_UPLOAD_COMPLETE Status codes for TCPIP_TFTP_UploadStatusGet() function. Zero
means upload success, >0 means working and <0 means fatal
error.
TFTP_UPLOAD_CONNECT This is macro TFTP_UPLOAD_CONNECT.
TFTP_UPLOAD_CONNECT_TIMEOUT This is macro TFTP_UPLOAD_CONNECT_TIMEOUT.
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TFTP_UPLOAD_GET_DNS This is macro TFTP_UPLOAD_GET_DNS.
TFTP_UPLOAD_HOST_RESOLVE_TIMEOUT This is macro TFTP_UPLOAD_HOST_RESOLVE_TIMEOUT.
TFTP_UPLOAD_RESOLVE_HOST This is macro TFTP_UPLOAD_RESOLVE_HOST.
TFTP_UPLOAD_SEND_DATA This is macro TFTP_UPLOAD_SEND_DATA.
TFTP_UPLOAD_SEND_FILENAME This is macro TFTP_UPLOAD_SEND_FILENAME.
TFTP_UPLOAD_SERVER_ERROR This is macro TFTP_UPLOAD_SERVER_ERROR.
TFTP_UPLOAD_WAIT_FOR_CLOSURE This is macro TFTP_UPLOAD_WAIT_FOR_CLOSURE.
TFTPClose Macro: void TFTPClose(void)
Closes TFTP client socket.
TFTPGetError Macro: uint16_t TFTPGetError(void)
Returns previously saved error code.
TFTPIsFileOpenReady Macro: bool TFTPIsFileOpenReady(void)
Checks to see if it is okay to send TFTP file open request to
remote server.
TFTP_ACCESS_ERROR Standard error codes as defined by TFTP spec. Use to decode
value retuned by TFTPGetError().
TFTP_CHUNK_DESCRIPTOR This is type TFTP_CHUNK_DESCRIPTOR.
TFTP_FILE_MODE File open mode as used by TFTPFileOpen().
TFTP_RESULT Enum. of results returned by most of the TFTP functions.
Functions
Name Description
TCPIP_TFTP_DataByteGet This is function TCPIP_TFTP_DataByteGet.
TCPIP_TFTP_DataBytePut This is function TCPIP_TFTP_DataBytePut.
TCPIP_TFTP_DataIsGetReady This is function TCPIP_TFTP_DataIsGetReady.
TCPIP_TFTP_FileClose This is function TCPIP_TFTP_FileClose.
TCPIP_TFTP_FileIsClosed This is function TCPIP_TFTP_FileIsClosed.
TCPIP_TFTP_FileIsOpen This is function TCPIP_TFTP_FileIsOpen.
TCPIP_TFTP_FragRAMFileUploadToHost This is function TCPIP_TFTP_FragRAMFileUploadToHost.
TCPIP_TFTP_IsOpen This is function TCPIP_TFTP_IsOpen.
TCPIP_TFTP_IsReadyForPut This is function TCPIP_TFTP_IsReadyForPut.
TCPIP_TFTP_Open This is function TCPIP_TFTP_Open.
TCPIP_TFTP_RAMFileUploadToHost This is function TCPIP_TFTP_RAMFileUploadToHost.
TCPIP_TFTP_UploadStatusGet This is function TCPIP_TFTP_UploadStatusGet.
TFTPOpenFile This is function TFTPOpenFile.
Description
This section describes the Application Programming Interface (API) functions of the TFTP TCP/IP Stack.
Refer to each section for a detailed description.
5.8.27.7.1 Functions
5.8.27.7.1.1 TCPIP_TFTP_DataByteGet Function
C
uint8_t TCPIP_TFTP_DataByteGet();
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Description
This is function TCPIP_TFTP_DataByteGet.
5.8.27.7.1.2 TCPIP_TFTP_DataBytePut Function
C
void TCPIP_TFTP_DataBytePut(
uint8_t c
);
Description
This is function TCPIP_TFTP_DataBytePut.
5.8.27.7.1.3 TCPIP_TFTP_DataIsGetReady Function
C
TFTP_RESULT TCPIP_TFTP_DataIsGetReady();
Description
This is function TCPIP_TFTP_DataIsGetReady.
5.8.27.7.1.4 TCPIP_TFTP_FileClose Function
C
void TCPIP_TFTP_FileClose();
Description
This is function TCPIP_TFTP_FileClose.
5.8.27.7.1.5 TCPIP_TFTP_FileIsClosed Function
C
TFTP_RESULT TCPIP_TFTP_FileIsClosed();
Description
This is function TCPIP_TFTP_FileIsClosed.
5.8.27.7.1.6 TCPIP_TFTP_FileIsOpen Function
C
TFTP_RESULT TCPIP_TFTP_FileIsOpen();
Description
This is function TCPIP_TFTP_FileIsOpen.
5.8.27.7.1.7 TCPIP_TFTP_FragRAMFileUploadToHost Function
C
void TCPIP_TFTP_FragRAMFileUploadToHost(
const uint8_t * vRemoteHost,
const uint8_t * vFilename,
TFTP_CHUNK_DESCRIPTOR * vFirstChunkDescriptor
);
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Description
This is function TCPIP_TFTP_FragRAMFileUploadToHost.
5.8.27.7.1.8 TCPIP_TFTP_IsOpen Function
C
TFTP_RESULT TCPIP_TFTP_IsOpen();
Description
This is function TCPIP_TFTP_IsOpen.
5.8.27.7.1.9 TCPIP_TFTP_IsReadyForPut Function
C
TFTP_RESULT TCPIP_TFTP_IsReadyForPut();
Description
This is function TCPIP_TFTP_IsReadyForPut.
5.8.27.7.1.10 TCPIP_TFTP_Open Function
C
void TCPIP_TFTP_Open(
IPV4_ADDR * host
);
Description
This is function TCPIP_TFTP_Open.
5.8.27.7.1.11 TCPIP_TFTP_RAMFileUploadToHost Function
C
void TCPIP_TFTP_RAMFileUploadToHost(
const uint8_t * vRemoteHost,
const uint8_t * vFilename,
uint8_t * vData,
uint16_t wDataLength
);
Description
This is function TCPIP_TFTP_RAMFileUploadToHost.
5.8.27.7.1.12 TCPIP_TFTP_UploadStatusGet Function
C
int8_t TCPIP_TFTP_UploadStatusGet();
Description
This is function TCPIP_TFTP_UploadStatusGet.
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5.8.27.7.1.13 TFTPOpenFile Function
C
void TFTPOpenFile(
const uint8_t * fileName,
TFTP_FILE_MODE mode
);
Description
This is function TFTPOpenFile.
5.8.27.7.2 Data Types and Constants
5.8.27.7.2.1 TFTP_UPLOAD_COMPLETE Macro
C
#define TFTP_UPLOAD_COMPLETE 0
Description
Status codes for TCPIP_TFTP_UploadStatusGet() function. Zero means upload success, >0 means working and <0 means fatal
error.
5.8.27.7.2.2 TFTP_UPLOAD_CONNECT Macro
C
#define TFTP_UPLOAD_CONNECT 3
Description
This is macro TFTP_UPLOAD_CONNECT.
5.8.27.7.2.3 TFTP_UPLOAD_CONNECT_TIMEOUT Macro
C
#define TFTP_UPLOAD_CONNECT_TIMEOUT -2
Description
This is macro TFTP_UPLOAD_CONNECT_TIMEOUT.
5.8.27.7.2.4 TFTP_UPLOAD_GET_DNS Macro
C
#define TFTP_UPLOAD_GET_DNS 1
Description
This is macro TFTP_UPLOAD_GET_DNS.
5.8.27.7.2.5 TFTP_UPLOAD_HOST_RESOLVE_TIMEOUT Macro
C
#define TFTP_UPLOAD_HOST_RESOLVE_TIMEOUT -1
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Description
This is macro TFTP_UPLOAD_HOST_RESOLVE_TIMEOUT.
5.8.27.7.2.6 TFTP_UPLOAD_RESOLVE_HOST Macro
C
#define TFTP_UPLOAD_RESOLVE_HOST 2
Description
This is macro TFTP_UPLOAD_RESOLVE_HOST.
5.8.27.7.2.7 TFTP_UPLOAD_SEND_DATA Macro
C
#define TFTP_UPLOAD_SEND_DATA 5
Description
This is macro TFTP_UPLOAD_SEND_DATA.
5.8.27.7.2.8 TFTP_UPLOAD_SEND_FILENAME Macro
C
#define TFTP_UPLOAD_SEND_FILENAME 4
Description
This is macro TFTP_UPLOAD_SEND_FILENAME.
5.8.27.7.2.9 TFTP_UPLOAD_SERVER_ERROR Macro
C
#define TFTP_UPLOAD_SERVER_ERROR -3
Description
This is macro TFTP_UPLOAD_SERVER_ERROR.
5.8.27.7.2.10 TFTP_UPLOAD_WAIT_FOR_CLOSURE Macro
C
#define TFTP_UPLOAD_WAIT_FOR_CLOSURE 6
Description
This is macro TFTP_UPLOAD_WAIT_FOR_CLOSURE.
5.8.27.7.2.11 TFTPClose Macro
C
#define TFTPClose(void) TCPIP_UDP_Close(_tftpSocket)
Description
Macro: void TFTPClose(void)
Closes TFTP client socket.
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Preconditions
TCPIP_TFTP_Open is already called and TCPIP_TFTP_IsOpen() returned TFTP_OK.
Returns
None
Side Effects
None
Remarks
Once closed, application must do TCPIP_TFTP_Open to perform any new TFTP operations.
If TFTP server does not change during application life-time, one may not need to call TFTPClose and keep TFTP socket open.
5.8.27.7.2.12 TFTPGetError Macro
C
#define TFTPGetError (_tftpError)
Description
Macro: uint16_t TFTPGetError(void)
Returns previously saved error code.
Preconditions
One of the TFTP function returned with TFTP_ERROR result.
Returns
Error code as returned by remote server. Application may use TFTP_ACCESS_ERROR enum. to decode standard error code.
Side Effects
None
Remarks
None
5.8.27.7.2.13 TFTPIsFileOpenReady Macro
C
#define TFTPIsFileOpenReady UDPIsPutReady(_tftpSocket)
Description
Macro: bool TFTPIsFileOpenReady(void)
Checks to see if it is okay to send TFTP file open request to remote server.
Preconditions
TCPIP_TFTP_Open is already called and TCPIP_TFTP_IsOpen() returned TFTP_OK.
Returns
true, if it is ok to call TFTPOpenFile() false, if otherwise.
Side Effects
None
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Remarks
None
5.8.27.7.2.14 TFTP_ACCESS_ERROR Type
C
typedef enum _TFTP_ACCESS_ERROR TFTP_ACCESS_ERROR;
Description
Standard error codes as defined by TFTP spec. Use to decode value retuned by TFTPGetError().
5.8.27.7.2.15 TFTP_CHUNK_DESCRIPTOR Structure
C
typedef struct {
uint8_t * vDataPointer;
uint16_t wDataLength;
} TFTP_CHUNK_DESCRIPTOR;
Description
This is type TFTP_CHUNK_DESCRIPTOR.
5.8.27.7.2.16 TFTP_FILE_MODE Type
C
typedef enum _TFTP_FILE_MODE TFTP_FILE_MODE;
Description
File open mode as used by TFTPFileOpen().
5.8.27.7.2.17 TFTP_RESULT Type
C
typedef enum _TFTP_RESULT TFTP_RESULT;
Description
Enum. of results returned by most of the TFTP functions.
5.8.27.8 Files
Files
Name Description
tftpc.h
tftpc_config.h (TFTP) Configuration file
Description
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5.8.27.8.1 tftpc.h
TFTP Client module for Microchip TCP/IP Stack
Functions
Name Description
TCPIP_TFTP_DataByteGet This is function TCPIP_TFTP_DataByteGet.
TCPIP_TFTP_DataBytePut This is function TCPIP_TFTP_DataBytePut.
TCPIP_TFTP_DataIsGetReady This is function TCPIP_TFTP_DataIsGetReady.
TCPIP_TFTP_FileClose This is function TCPIP_TFTP_FileClose.
TCPIP_TFTP_FileIsClosed This is function TCPIP_TFTP_FileIsClosed.
TCPIP_TFTP_FileIsOpen This is function TCPIP_TFTP_FileIsOpen.
TCPIP_TFTP_FragRAMFileUploadToHost This is function TCPIP_TFTP_FragRAMFileUploadToHost.
TCPIP_TFTP_IsOpen This is function TCPIP_TFTP_IsOpen.
TCPIP_TFTP_IsReadyForPut This is function TCPIP_TFTP_IsReadyForPut.
TCPIP_TFTP_Open This is function TCPIP_TFTP_Open.
TCPIP_TFTP_RAMFileUploadToHost This is function TCPIP_TFTP_RAMFileUploadToHost.
TCPIP_TFTP_UploadStatusGet This is function TCPIP_TFTP_UploadStatusGet.
TFTPOpenFile This is function TFTPOpenFile.
Macros
Name Description
TFTP_MAX_RETRIES Number of attempts before declaring TIMEOUT error.
TFTP_UPLOAD_COMPLETE Status codes for TCPIP_TFTP_UploadStatusGet() function. Zero
means upload success, >0 means working and <0 means fatal
error.
TFTP_UPLOAD_CONNECT This is macro TFTP_UPLOAD_CONNECT.
TFTP_UPLOAD_CONNECT_TIMEOUT This is macro TFTP_UPLOAD_CONNECT_TIMEOUT.
TFTP_UPLOAD_GET_DNS This is macro TFTP_UPLOAD_GET_DNS.
TFTP_UPLOAD_HOST_RESOLVE_TIMEOUT This is macro TFTP_UPLOAD_HOST_RESOLVE_TIMEOUT.
TFTP_UPLOAD_RESOLVE_HOST This is macro TFTP_UPLOAD_RESOLVE_HOST.
TFTP_UPLOAD_SEND_DATA This is macro TFTP_UPLOAD_SEND_DATA.
TFTP_UPLOAD_SEND_FILENAME This is macro TFTP_UPLOAD_SEND_FILENAME.
TFTP_UPLOAD_SERVER_ERROR This is macro TFTP_UPLOAD_SERVER_ERROR.
TFTP_UPLOAD_WAIT_FOR_CLOSURE This is macro TFTP_UPLOAD_WAIT_FOR_CLOSURE.
TFTPClose Macro: void TFTPClose(void)
Closes TFTP client socket.
TFTPGetError Macro: uint16_t TFTPGetError(void)
Returns previously saved error code.
TFTPIsFileOpenReady Macro: bool TFTPIsFileOpenReady(void)
Checks to see if it is okay to send TFTP file open request to
remote server.
Structures
Name Description
TFTP_CHUNK_DESCRIPTOR This is type TFTP_CHUNK_DESCRIPTOR.
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Types
Name Description
TFTP_ACCESS_ERROR Standard error codes as defined by TFTP spec. Use to decode value retuned by
TFTPGetError().
TFTP_FILE_MODE File open mode as used by TFTPFileOpen().
TFTP_RESULT Enum. of results returned by most of the TFTP functions.
5.8.27.8.2 tftpc_config.h
Trivial File Transfer Protocol (TFTP) Configuration file
This file contains the TFTP module configuration options
Macros
Name Description
TFTP_ARP_TIMEOUT_VAL Number of seconds to wait before declaring TIMEOUT error on Put, seconds
TFTP_BLOCK_SIZE The size of a TFTP block - 512 bytes
TFTP_BLOCK_SIZE_MSB The MSB of the TFTP_BLOCK_SIZE
TFTP_CLIENT_PORT The TFTP Client port - a unique port on this device
TFTP_GET_TIMEOUT_VAL Number of seconds to wait before declaring TIMEOUT error on Get, seconds.
TFTP_SERVER_PORT The TFTP Server Port
5.8.28 UDP TCP/IP Stack Library
5.8.28.1 Introduction
UDP TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the UDP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
UDP is a standard transport layer protocol described in RFC 768. It provides fast but unreliable data-gram based transfers
over networks, and forms the foundation SNTP, SNMP, DNS, and many other protocol standards.
5.8.28.2 Release Notes
MPLAB Harmony Version: v0.70b UDP TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
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This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.28.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.28.4 Using the Library
This topic describes the basic architecture of the UDP TCP/IP Stack Library and provides information and examples on how to
use it.
Interface Header File: udp.h
The interface to the UDP TCP/IP Stack library is defined in the "udp.h" header file. This file is included by the "tcpip.h" file. Any C
language source (.c) file that uses the UDP TCP/IP Stack library should include "tcpip.h".
Library File:
The UDP TCPIP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.28.4.1 Abstraction Model
This library provides the API of the UDP TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
UDP Software Abstraction Block Diagram
This module provides software abstraction of the UDP module existent in any TCP/IP Stack implementation. It removes the
overhead of address resolution from all other modules in the stack.
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Typical UDP Implementation
5.8.28.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the UDP module.
Library Interface Section Description
Socket Management Functions Routines for Managing UDP Sockets
Transmit Data Transfer Functions Routines for Managing Outgoing Data Transmissions
Receive Data Transfer Functions Routines for Managing Incoming Data Transmissions
Data Types and Constants This section provides various definitions describing This API
5.8.28.4.3 How the Library Works
Connections over UDP should be thought of as data-gram based transfers. Each packet is a separate entity, the application
should expect some packets to arrive out-of-order or even fail to reach the destination node. This is in contrast to TCP, in which
the connection is thought of as a stream and network errors are automatically corrected. These tradeoffs in reliability are made
for an increase in throughput. In general, UDP transfers operate 2 to 3 times faster than those made over TCP.
Since UDP is packet-oriented, each packet must be dealt with in its entirety by your application before returning to the main
stack loop. When a packet is received, your application will be called to handle it. This packet will no longer be available the next
time your application is called, so you must either perform all necessary processing or copy the data elsewhere before returning.
When transmitting a packet, your application must build and transmit the complete packet in one cycle.
5.8.28.4.3.1 Core Functionality
The UDP flow diagram below provides an overview for the use of the UDP module:
Note: This image was not available at time of release and will be added in a future release of MPLAB Harmony.
Sockets are opened using UDPOpen. This function can either open a listening socket to wait for incoming segments, or can
make a client connection to a remote node. When making a client connection, you will need to perform any required DNS and/or
ARP resolution using those modules directly before invoking UDPOpen.
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Once the socket is opened, you can immediately begin transmitting data. To transmit a segment, call UDPIsPutReady to
determine how many bytes can be written and to designate a currently active socket. Then, use any of the TCPIP_UDP_Put
family of functions to write data to the socket. Once all data has been written, call TCPIP_UDP_Flush to build and transmit the
packet. This sequence must be accomplished all in one step. If your application returns to the main stack loop after calling
TCPIP_UDP_Put but before calling TCPIP_UDP_Flush, the data may be lost or the module may behave unpredictably.
5.8.28.5 Configuring the Library
Macros
Name Description
UDP_LOCAL_PORT_END_NUMBER Last port number for randomized local port number selection
UDP_LOCAL_PORT_START_NUMBER The dynamic port range defined by IANA consists of the
49152-65535 range and is meant for the selection of ephemeral
ports (RFC 6056). Adjust to your needs but stay within the IANA
range First port number for randomized local port number selection
UDP_MAX_SOCKETS global number of UDP sockets created dynamically
UDP_SOCKET_DEFAULT_TX_QUEUE_LIMIT the maximum number of packets that can be queued by an UDP
socket at a certain time. For sockets that need to transfer a lot of
data (iperf, for example), especially on slow conenctions this limit
prevents running out of memory because the MAC transfer cannot
keep up with the UDP packet allocation rate imposed by the
aapplication. Adjust depending on the
UDP_SOCKET_DEFAULT_TX_SIZE, the connection speed and
the amount of memory available to the stack.
UDP_SOCKET_DEFAULT_TX_SIZE default socket Tx buffer size
UDP_SOCKET_POOL_BUFFER_SIZE size of the buffers in the UDP pool any UDP socket that is enabled
to use the pool and has the TX size <= than this size can use a
buffer from the pool
UDP_SOCKET_POOL_BUFFERS use 0 to disable the feature
UDP_USE_RX_CHECKSUM check incoming packets to have proper checksum
UDP_USE_TX_CHECKSUM This slows UDP TX performance by nearly 50%, except when
using the ENCX24J600, which has a super fast DMA and incurs
virtually no speed pentalty.
Description
The configuration of the UDP TCP/IP Stack Library is based on the file sys_config.h
This header file contains the configuration selection for the UP TCP/IP Stack Library. Based on the selections made, the UDP
TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all instances of the
UDP TCP/IP Stack Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.28.5.1 UDP_LOCAL_PORT_END_NUMBER Macro
C
#define UDP_LOCAL_PORT_END_NUMBER (65535)
Description
Last port number for randomized local port number selection
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5.8.28.5.2 UDP_LOCAL_PORT_START_NUMBER Macro
C
#define UDP_LOCAL_PORT_START_NUMBER (49152)
Description
The dynamic port range defined by IANA consists of the 49152-65535 range and is meant for the selection of ephemeral ports
(RFC 6056). Adjust to your needs but stay within the IANA range First port number for randomized local port number selection
5.8.28.5.3 UDP_MAX_SOCKETS Macro
C
#define UDP_MAX_SOCKETS (10)
Description
global number of UDP sockets created dynamically
5.8.28.5.4 UDP_SOCKET_DEFAULT_TX_QUEUE_LIMIT Macro
C
#define UDP_SOCKET_DEFAULT_TX_QUEUE_LIMIT 3
Description
the maximum number of packets that can be queued by an UDP socket at a certain time. For sockets that need to transfer a lot
of data (iperf, for example), especially on slow conenctions this limit prevents running out of memory because the MAC transfer
cannot keep up with the UDP packet allocation rate imposed by the aapplication. Adjust depending on the
UDP_SOCKET_DEFAULT_TX_SIZE, the connection speed and the amount of memory available to the stack.
5.8.28.5.5 UDP_SOCKET_DEFAULT_TX_SIZE Macro
C
#define UDP_SOCKET_DEFAULT_TX_SIZE 512
Description
default socket Tx buffer size
5.8.28.5.6 UDP_SOCKET_POOL_BUFFER_SIZE Macro
C
#define UDP_SOCKET_POOL_BUFFER_SIZE 512 // size of the buffers in the UDP pool
Description
size of the buffers in the UDP pool any UDP socket that is enabled to use the pool and has the TX size <= than this size can use
a buffer from the pool
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5.8.28.5.7 UDP_SOCKET_POOL_BUFFERS Macro
C
#define UDP_SOCKET_POOL_BUFFERS 4 // use 0 to disable the feature
Description
use 0 to disable the feature
5.8.28.5.8 UDP_USE_RX_CHECKSUM Macro
C
#define UDP_USE_RX_CHECKSUM
Description
check incoming packets to have proper checksum
5.8.28.5.9 UDP_USE_TX_CHECKSUM Macro
C
#define UDP_USE_TX_CHECKSUM
Description
This slows UDP TX performance by nearly 50%, except when using the ENCX24J600, which has a super fast DMA and incurs
virtually no speed pentalty.
5.8.28.6 Building the Library
This section list the files that are available in the \src of the UDP driver. It lists which files need to be included in the build based
on either a hardware feature present on the board or configuration option selected by the system.
• udp.c
5.8.28.7 Library Interface
Data Types and Constants
Name Description
INVALID_UDP_SOCKET Indicates a UDP socket that is not valid
TCPIP_UDP_IsOpened backward compatibility call
UDP_MODULE_CONFIG UDP layer configuration/initialization
UDP_PORT Stores a UDP Port Number
UDP_SOCKET Provides a handle to a UDP Socket
UDP_SOCKET_BCAST_TYPE This is type UDP_SOCKET_BCAST_TYPE.
UDP_SOCKET_INFO Information about a socket
UDP_SOCKET_OPTION UDP socket options
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Receive Data Transfer Functions
Name Description
TCPIP_UDP_Discard Discards any remaining RX data from a UDP socket.
TCPIP_UDP_Get Reads a byte from the UDP socket.
TCPIP_UDP_GetIsReady Determines how many bytes can be read from the UDP socket.
TCPIP_UDP_RxOffsetSet Moves the pointer within the RX buffer.
Socket Management Functions
Name Description
TCPIP_UDP_BcastIPV4AddressSet Sets the broadcast IP address of a socket Allows an UDP socket to send
broadcasts.
TCPIP_UDP_Bind Bind a socket to a local address and port. This function is meant for client
sockets. It assigns a specific source address and port for a socket.
TCPIP_UDP_ClientOpen Opens a UDP socket as a client.
TCPIP_UDP_Close Closes a UDP socket and frees the handle.
TCPIP_UDP_DestinationIPAddressSet Sets the destination IP address of a socket
TCPIP_UDP_IsConnected Determines if a socket has an established connection.
TCPIP_UDP_OptionsGet Allows getting the options for a socket like: current Rx/Tx buffer size, etc
TCPIP_UDP_OptionsSet Allows setting options to a socket like adjust Rx/Tx buffer size, etc
TCPIP_UDP_RemoteBind Bind a socket to a remote address This function is meant for server
sockets.
TCPIP_UDP_ServerOpen Opens a UDP socket as a server.
TCPIP_UDP_SocketInfoGet Points handle at socket unfo for socket hUDP
TCPIP_UDP_SocketNetGet Gets the network interface of an UDP socket
TCPIP_UDP_SocketNetSet Sets the network interface for an UDP socket
TCPIP_UDP_SourceIPAddressSet Sets the source IP address of a socket
TCPIP_UDP_TxOffsetSet Moves the pointer within the TX buffer.
Transmit Data Transfer Functions
Name Description
TCPIP_UDP_ArrayGet Reads an array of bytes from the UDP socket.
TCPIP_UDP_Flush Transmits all pending data in a UDP socket.
TCPIP_UDP_Put Writes a byte to the UDP socket.
TCPIP_UDP_StringPut Writes null-terminated string to the UDP socket.
TCPIP_UDP_TxCountGet Returns the amount of bytes written into the UDP socket.
TCPIP_UDP_TxPutIsReady Determines how many bytes can be written to the UDP socket.
TCPIP_UDP_ArrayPut Writes an array of bytes to the UDP socket.
UDPIsPutReady Determines how many bytes can be written to the UDP socket.
Description
This section describes the Application Programming Interface (API) functions of the UDP TCP/IP Stack Library.
Refer to each section for a detailed description.
5.8.28.7.1 Socket Management Functions
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5.8.28.7.1.1 TCPIP_UDP_BcastIPV4AddressSet Function
C
bool TCPIP_UDP_BcastIPV4AddressSet(
UDP_SOCKET s,
UDP_SOCKET_BCAST_TYPE bcastType,
TCPIP_NET_HANDLE hNet
);
Description
It sets the broadcast address for the socket
Preconditions
UDP initialized UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). s - valid
socket
Parameters
Parameters Description
s the UDP socket
bcastType Type of broadcast
hNet handle of an interface to use for the network directed broadcast Not used for
network limited broadcast
Returns
True if success False otherwise
Remarks
This function allows changing of the destination IPv4 address dynamically.
However, the call will fail if the socket was previously set to broadcast using the TCPIP_UDP_OptionsSet call.
TCPIP_UDP_OptionsSet takes precedence.
5.8.28.7.1.2 TCPIP_UDP_Bind Function
C
bool TCPIP_UDP_Bind(
UDP_SOCKET hUDP,
IP_ADDRESS_TYPE addType,
UDP_PORT localPort,
IP_MULTI_ADDRESS* localAddress
);
Description
Sockets don't need specific binding, it is done automatically by the stack However, specific binding can be requested using these
functions. Works for both client and server sockets.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP The socket to bind.
addType The type of address being used. Example: IP_ADDRESS_TYPE_IPV4.
localPort The local port to bind to.
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localAddress Local address to use.
Returns
True if success False otherwise
Remarks
If localAddress == 0 the local address of the socket won't be changed.
If localPort is 0 the stack will assign a unique local port
5.8.28.7.1.3 TCPIP_UDP_ClientOpen Function
C
UDP_SOCKET TCPIP_UDP_ClientOpen(
IP_ADDRESS_TYPE addType,
UDP_PORT remotePort,
IP_MULTI_ADDRESS* remoteAddress
);
Description
Provides a unified method for opening UDP client sockets.
Preconditions
UDP is initialized.
Parameters
Parameters Description
IP_ADDRESS_TYPE addType The type of address being used. Example: IP_ADDRESS_TYPE_IPV4.
UDP_PORT remotePort The remote UDP port to which a connection should be made. The local port for
client sockets will be automatically picked by the UDP module.
IP_MULTI_ADDRESS* remoteAddress The remote address to connect to.
Returns
INVALID_SOCKET - No sockets of the specified type were available to be opened.
Otherwise - A UDP_SOCKET handle. Save this handle and use it when calling all other UDP APIs.
Remarks
IP_ADDRESS_TYPE_ANY is not supported!
5.8.28.7.1.4 TCPIP_UDP_Close Function
C
void TCPIP_UDP_Close(
UDP_SOCKET hUDP
);
Description
Closes a UDP socket and frees the handle. Call this function to release a socket and return it to the pool for use by future
communications.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
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Parameters
Parameters Description
hUDP The socket handle to be released.
Returns
None
5.8.28.7.1.5 TCPIP_UDP_DestinationIPAddressSet Function
C
bool TCPIP_UDP_DestinationIPAddressSet(
UDP_SOCKET s,
IP_ADDRESS_TYPE addType,
IP_MULTI_ADDRESS* remoteAddress
);
Description
• It sets the IP destination address This allows changing the destination IPv4 address dynamically.
Preconditions
UDP initialized UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). s - valid
socket remoteAddress - valid address pointer
Parameters
Parameters Description
s the UDP socket
addType Type of address: IPv4/IPv6
remoteAddress pointer to an address to use
Returns
true if success false otherwise
Remarks
The call will fail if the socket was previously set to broadcast using the TCPIP_UDP_OptionsSet call. TCPIP_UDP_OptionsSet
takes precedence.
The call will fail if remoteAddress is 0. The destination IP address will not be changed.
5.8.28.7.1.6 TCPIP_UDP_IsConnected Function
C
bool TCPIP_UDP_IsConnected(
UDP_SOCKET hUDP
);
Description
This function determines if a socket has an established connection to a remote node . Call this function after calling
TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen() to determine when the connection is set up and ready for use.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
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Parameters
Parameters Description
hUDP The socket to check.
Return Values
Return Values Description
true The socket has been opened and ARP has been resolved.
false The socket is not currently connected.
Remarks
None
5.8.28.7.1.7 TCPIP_UDP_OptionsGet Function
C
bool TCPIP_UDP_OptionsGet(
UDP_SOCKET hUDP,
UDP_SOCKET_OPTION option,
void* optParam
);
Description
Various options can be get at the socket level. This function provides compatibility with BSD implementations.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP socket to get options for
option specific option to get
optParam pointer to an area that will receive the option value; this is option dependent the
size of the area has to be large enough to accomodate the specific option
UDP_OPTION_STRICT_PORT -- pointer to boolean
UDP_OPTION_STRICT_NET -- pointer to boolean UDP_OPTION_BROADCAST
-- UDP_SOCKET_BCAST_TYPE UDP_OPTION_BUFFER_POOL -- pointer to
boolean UDP_OPTION_TX_BUFF -- pointer to a 16 bit value to receive bytes of
the TX buffer UDP_OPTION_TX_QUEUE_LIMIT -- pointer to an 8 bit value to
receive the TX queue limit
Returns
true if success false otherwise
5.8.28.7.1.8 TCPIP_UDP_OptionsSet Function
C
bool TCPIP_UDP_OptionsSet(
UDP_SOCKET hUDP,
UDP_SOCKET_OPTION option,
void* optParam
);
Description
Various options can be set at the socket level. This function provides compatibility with BSD implementations.
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Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP socket to set options for
option specific option to be set
optParam the option value; this is option dependent UDP_OPTION_STRICT_PORT --
boolean enable/disable UDP_OPTION_STRICT_NET -- boolean enable/disable
UDP_OPTION_BROADCAST -- UDP_SOCKET_BCAST_TYPE
UDP_OPTION_BUFFER_POOL -- boolean enable/disable
Returns
true if success false otherwise
Remarks
changing the UDP_OPTION_BUFFER_POOL will discard the data in the current socket buffer UDP_OPTION_TX_BUFF -- 16
bit value in bytes of the TX buffer
the UDP_OPTION_TX_BUFF will discard the data in the current socket buffer UDP_OPTION_TX_QUEUE_LIMIT -- 8 bit value
of the TX queue limit
5.8.28.7.1.9 TCPIP_UDP_RemoteBind Function
C
bool TCPIP_UDP_RemoteBind(
UDP_SOCKET hUDP,
IP_ADDRESS_TYPE addType,
UDP_PORT remotePort,
IP_MULTI_ADDRESS* remoteAddress
);
Description
Sockets don't need specific remote binding, they should accept connections on any incoming interface. Thus the binding is done
automatically by the stack. However, specific binding can be requested using these functions. For a server socket it can be used
to restrict accepting connections from a specific remote host. For a client socket it will just change the default binding done when
the socket was opened. TBD: the call should fail if the socket is already bound to an interface (a server socket is connected or a
client socket already sent the data on an interface). Implementation pending
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP The socket to bind.
addType The type of address being used. Example: IP_ADDRESS_TYPE_IPV4.
remotePort The remote port to bind to.
remoteAddress Remote address to use.
Returns
True if success False otherwise
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Remarks
If remoteAddress == 0 the remote address of the socket won't be changed. The remote port is always changed, even if
remotePort == 0.
5.8.28.7.1.10 TCPIP_UDP_ServerOpen Function
C
UDP_SOCKET TCPIP_UDP_ServerOpen(
IP_ADDRESS_TYPE addType,
UDP_PORT localPort,
IP_MULTI_ADDRESS* localAddress
);
Description
Provides a unified method for opening UDP server sockets.
Preconditions
UDP is initialized.
Parameters
Parameters Description
IP_ADDRESS_TYPE addType The type of address being used. Example: IP_ADDRESS_TYPE_IPV4.
UDP_PORT localPort UDP port on which to listen for connections
IP_MULTI_ADDRESS* localAddress Local address to use. Can be NULL if any incoming interface will do.
Returns
INVALID_SOCKET - No sockets of the specified type were available to be opened.
Otherwise - A UDP_SOCKET handle. Save this handle and use it when calling all other UDP APIs.
5.8.28.7.1.11 TCPIP_UDP_SocketInfoGet Function
C
bool TCPIP_UDP_SocketInfoGet(
UDP_SOCKET hUDP,
UDP_SOCKET_INFO* pInfo
);
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
UDP_SOCKET hUDP Socket to obtain info for.
UDP_SOCKET_INFO* pInfo pointer to reference info location.
5.8.28.7.1.12 TCPIP_UDP_SocketNetGet Function
C
TCPIP_NET_HANDLE TCPIP_UDP_SocketNetGet(
UDP_SOCKET hUDP
);
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Description
This function returns the interface handle of an UDP socket
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP The UDP socket
Returns
IHandle of the interface that socket currently uses.
5.8.28.7.1.13 TCPIP_UDP_SocketNetSet Function
C
bool TCPIP_UDP_SocketNetSet(
UDP_SOCKET hUDP,
TCPIP_NET_HANDLE hNet
);
Description
This function sets the network interface for an UDP socket
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP The UDP socket
hNet interface handle
Returns
true if success false otherwise.
Remarks
An invalid hNet can be passed (0) so that the current socket network interface selection will be cleared
5.8.28.7.1.14 TCPIP_UDP_SourceIPAddressSet Function
C
bool TCPIP_UDP_SourceIPAddressSet(
UDP_SOCKET s,
IP_ADDRESS_TYPE addType,
IP_MULTI_ADDRESS* localAddress
);
Description
• It sets the IP source address This allows changing the source IPv4 address dynamically.
Preconditions
UDP initialized UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). s - valid
socket localAddress - valid address pointer
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Parameters
Parameters Description
s the UDP socket
addType Type of address: IPv4/IPv6
localAddress pointer to an address to use
Returns
true if success false otherwise
Remarks
The call will fail if localAddress is 0. The source IP address will not be changed.
5.8.28.7.1.15 TCPIP_UDP_TxOffsetSet Function
C
bool TCPIP_UDP_TxOffsetSet(
UDP_SOCKET hUDP,
uint16_t wOffset,
bool relative
);
Description
This function allows the write location within the TX buffer to be specified. Future calls to TCPIP_UDP_Put,
TCPIP_UDP_ArrayPut, TCPIP_UDP_StringPut, etc will write data from the indicated location.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP UDP socket handle
wOffset Offset in the UDP packet data payload to move the write pointer.
relative if true, the wOffset is added to the current write pointer. else the wOffset is from
the beginning of the UDP buffer
Returns
true if the offset is a valid one false otherwise
5.8.28.7.2 Transmit Data Transfer Functions
5.8.28.7.2.1 TCPIP_UDP_ArrayGet Function
C
uint16_t TCPIP_UDP_ArrayGet(
UDP_SOCKET hUDP,
uint8_t * cData,
uint16_t wDataLen
);
Description
This function reads an array of bytes from the UDP socket, while decrementing the remaining bytes available.
TCPIP_UDP_GetIsReady could be used before calling this function to get the numberof the available bytes in the socket.
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Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP UDP socket handle
cData The buffer to receive the bytes being read. If NULL, the bytes are simply discarded
without being written anywhere (effectively skips over the bytes in the RX buffer,
although if you need to skip a lot of data, seeking using the
TCPIP_UDP_RxOffsetSet() will be more efficient).
wDateLen Number of bytes to be read from the socket.
Returns
The number of bytes successfully read from the UDP buffer. If this value is less than wDataLen, then the buffer was emptied and
no more data is available.
5.8.28.7.2.2 TCPIP_UDP_Flush Function
C
uint16_t TCPIP_UDP_Flush(
UDP_SOCKET hUDP
);
Description
This function builds a UDP packet with the pending TX data and marks it for transmission over the network interface. There is no
UDP state machine to send the socket data automatically. The UDP socket client must call this function to actually send the data
over the network.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP UDP socket handle
Returns
The number of bytes that currently were in the socket TX buffer and have been flushed.
Remarks
Note that unlike TCPIP_TCP_Flush, TCPIP_UDP_Flush must be called before returning to the main stack loop. There is no auto
transmit for UDP segments.
5.8.28.7.2.3 TCPIP_UDP_Put Function
C
uint16_t TCPIP_UDP_Put(
UDP_SOCKET hUDP,
uint8_t v
);
Description
This function writes a single byte to the UDP socket, while incrementing the buffer length. TCPIP_UDP_TxPutIsReady could be
used before calling this function to verify that there is room in the socket buffer.
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Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP UDP socket handle
v The byte to be loaded into the transmit buffer.
Return Values
Return Values Description
1 The byte was successfully written to the socket.
0 The transmit buffer is already full and so the write failed.
Remarks
The following function is very inefficient. A buffered approach (TCPIP_UDP_ArrayPut) should be preferred
5.8.28.7.2.4 TCPIP_UDP_StringPut Function
C
const uint8_t* TCPIP_UDP_StringPut(
UDP_SOCKET hUDP,
const uint8_t * strData
);
Description
This function writes a null-terminated string to the UDP socket while incrementing the buffer length. TCPIP_UDP_TxPutIsReady
could be used before calling this function to verify that there is room in the socket buffer.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP UDP socket handle
cData Pointer to the string to be written to the socket.
Returns
A pointer to the byte following the last byte written. Note that this is different than the TCPIP_UDP_ArrayPut functions. If this
pointer does not dereference to a NULL byte, then the buffer became full and the input data was truncated.
5.8.28.7.2.5 TCPIP_UDP_TxCountGet Function
C
uint16_t TCPIP_UDP_TxCountGet(
UDP_SOCKET hUDP
);
Description
This function returns the amount of bytes written into the UDP socket,
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
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Parameters
Parameters Description
hUDP UDP socket handle
5.8.28.7.2.6 TCPIP_UDP_TxPutIsReady Function
C
uint16_t TCPIP_UDP_TxPutIsReady(
UDP_SOCKET hUDP,
unsigned short count
);
Description
This function determines how many bytes can be written to the specified UDP socket.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP UDP socket handle
count Number of bytes requested
Returns
The number of bytes that can be written to this socket.
Remarks
The function won't increase the size of the UDP TX buffer. If this is needed use TCPIP_UDP_OptionsSet(). The count variable is
not used.
5.8.28.7.2.7 TCPIP_UDP_ArrayPut Function
C
uint16_t TCPIP_UDP_ArrayPut(
UDP_SOCKET hUDP,
const uint8_t * cData,
uint16_t wDataLen
);
Description
This function writes an array of bytes to the UDP socket, while incrementing the buffer length. TCPIP_UDP_TxPutIsReady could
be used before calling this function to verify that there is room in the socket buffer.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
cData The array to write to the socket.
wDateLen Number of bytes from cData to be written.
Returns
The number of bytes successfully placed in the UDP transmit buffer. If this value is less than wDataLen, then the buffer became
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full and the input was truncated.
5.8.28.7.2.8 UDPIsPutReady Function
C
uint16_t UDPIsPutReady(
UDP_SOCKET hUDP
);
Description
This function determines how many bytes can be written to the specified UDP socket.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP UDP socket handle
Returns
The number of bytes that can be written to this socket.
Remarks
The function is similar to the TCPIP_UDP_TxPutIsReady and maintained for backward compatibility.
5.8.28.7.3 Receive Data Transfer Functions
5.8.28.7.3.1 TCPIP_UDP_Discard Function
C
void TCPIP_UDP_Discard(
UDP_SOCKET hUDP
);
Description
This function discards any remaining received data in the UDP socket.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP socket handle
Returns
None
Remarks
It is safe to call this function more than is necessary. If no data is available, this function does nothing.
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5.8.28.7.3.2 TCPIP_UDP_Get Function
C
uint16_t TCPIP_UDP_Get(
UDP_SOCKET hUDP,
uint8_t * v
);
Description
This function reads a single byte from the UDP socket, while decrementing the remaining buffer length.
TCPIP_UDP_GetIsReady could be used before calling this function to get the number of bytes available in the socket.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP socket handle
v The buffer to receive the data being read.
Return Values
Return Values Description
1 A byte was successfully read
0 No data remained in the read buffer or invalid socket
Remarks
The following function is very inefficient. A buffered approach (TCPIP_UDP_ArrayGet) should be preferred
5.8.28.7.3.3 TCPIP_UDP_GetIsReady Function
C
uint16_t TCPIP_UDP_GetIsReady(
UDP_SOCKET hUDP
);
Description
This function determines if bytes can be read from the specified UDP socket.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP UDP socket handle
Returns
The number of bytes that can be read from this socket.
5.8.28.7.3.4 TCPIP_UDP_RxOffsetSet Function
C
void TCPIP_UDP_RxOffsetSet(
UDP_SOCKET hUDP,
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uint16_t rOffset
);
Description
This function allows the read location within the RX buffer to be specified. Future calls to TCPIP_UDP_Get and
TCPIP_UDP_ArrayGet will read data from the indicated location forward.
Preconditions
UDP socket should have been opened with TCPIP_UDP_ServerOpen()/TCPIP_UDP_ClientOpen()(). hUDP - valid socket
Parameters
Parameters Description
hUDP UDP socket handle
wOffset Offset from beginning of UDP packet data payload to place the read pointer.
Returns
None
5.8.28.7.4 Data Types and Constants
5.8.28.7.4.1 INVALID_UDP_SOCKET Macro
C
#define INVALID_UDP_SOCKET (-1) // Indicates a UDP socket that is not valid
Description
Indicates a UDP socket that is not valid
5.8.28.7.4.2 TCPIP_UDP_IsOpened Macro
C
#define TCPIP_UDP_IsOpened(s) TCPIP_UDP_IsConnected(s)
Description
backward compatibility call
5.8.28.7.4.3 UDP_MODULE_CONFIG Structure
C
typedef struct {
uint16_t nSockets;
uint16_t sktTxBuffSize;
uint16_t poolBuffers;
uint16_t poolBufferSize;
} UDP_MODULE_CONFIG;
Description
UDP layer configuration/initialization
Members
Members Description
uint16_t nSockets; number of sockets to be created
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uint16_t sktTxBuffSize; size of the socket tx buffer
uint16_t poolBuffers; number of buffers in the pool; 0 if none
uint16_t poolBufferSize; size of the buffers in the pool; all equal
5.8.28.7.4.4 UDP_PORT Type
C
typedef uint16_t UDP_PORT;
Description
Stores a UDP Port Number
5.8.28.7.4.5 UDP_SOCKET Type
C
typedef int16_t UDP_SOCKET;
Description
Provides a handle to a UDP Socket
5.8.28.7.4.6 UDP_SOCKET_BCAST_TYPE Enumeration
C
typedef enum {
UDP_BCAST_NONE,
UDP_BCAST_NETWORK_LIMITED,
UDP_BCAST_NETWORK_DIRECTED
} UDP_SOCKET_BCAST_TYPE;
Description
This is type UDP_SOCKET_BCAST_TYPE.
Members
Members Description
UDP_BCAST_NONE no broadcast
UDP_BCAST_NETWORK_LIMITED network limited broadcast
UDP_BCAST_NETWORK_DIRECTED network directed broadcast
5.8.28.7.4.7 UDP_SOCKET_INFO Structure
C
typedef struct {
IP_ADDRESS_TYPE addressType;
IP_MULTI_ADDRESS remoteIPaddress;
IP_MULTI_ADDRESS localIPaddress;
UDP_PORT remotePort;
UDP_PORT localPort;
} UDP_SOCKET_INFO;
Description
Information about a socket
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Members
Members Description
UDP_PORT remotePort; Port number associated with remote node
UDP_PORT localPort; local port number
5.8.28.7.4.8 UDP_SOCKET_OPTION Enumeration
C
typedef enum {
UDP_OPTION_STRICT_PORT,
UDP_OPTION_STRICT_NET,
UDP_OPTION_BROADCAST,
UDP_OPTION_BUFFER_POOL,
UDP_OPTION_TX_BUFF,
UDP_OPTION_TX_QUEUE_LIMIT
} UDP_SOCKET_OPTION;
Description
UDP socket options
Members
Members Description
UDP_OPTION_STRICT_PORT When connection is done the socket stores the remote host local port. If option is
enabled the remote host local port is always checked to match the initial one. If
disabled the remote host local port is not checked. Disabled by default on a socket
server. Enabled by default on a client socket.
UDP_OPTION_STRICT_NET When connection is done the socket stores th enetwork interface the connection
occurred on. If option is enabled the socket accepts data only from the interface
that matches the initial connection. If disabled the socket receives data from any
remote host irrespective of the interface on which the packet arrived. Disabled by
default on a socket server. Enabled by default on a client socket.
UDP_OPTION_BROADCAST Enables the Broadcast transmission by the socket
UDP_OPTION_BUFFER_POOL Enables the socket to use the private UDP buffers pool. The size of the TX buffer
has to be less than the size of the buffers in the pool
UDP_OPTION_TX_BUFF request different TX buffer size. Has to call TCPIP_UDP_OptionsGet to see the
exact space allocated
UDP_OPTION_TX_QUEUE_LIMIT Sets the maximum number of packets that can be queued/allocated by an UDP
socket at a certain time. For sockets that need to transmit a lot of data (iperf client,
for example), especially on slow conenctions this limit prevents running out of
memory because the MAC transfer cannot keep up with the UDP packet allocation
rate imposed by the aapplication. Adjust depending on the size of the UDP TX
buffer, the connection speed and the amount of memory available to the stack.
5.8.28.8 Files
Files
Name Description
udp.h
udp_config.h UDP onfiguration file
Description
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5.8.28.8.1 udp.h
UDP Module Defs for Microchip TCP/IP Stack
Enumerations
Name Description
UDP_SOCKET_BCAST_TYPE This is type UDP_SOCKET_BCAST_TYPE.
UDP_SOCKET_OPTION UDP socket options
Functions
Name Description
TCPIP_UDP_ArrayGet Reads an array of bytes from the UDP socket.
TCPIP_UDP_ArrayPut Writes an array of bytes to the UDP socket.
TCPIP_UDP_BcastIPV4AddressSet Sets the broadcast IP address of a socket Allows an UDP socket to send
broadcasts.
TCPIP_UDP_Bind Bind a socket to a local address and port. This function is meant for client
sockets. It assigns a specific source address and port for a socket.
TCPIP_UDP_ClientOpen Opens a UDP socket as a client.
TCPIP_UDP_Close Closes a UDP socket and frees the handle.
TCPIP_UDP_DestinationIPAddressSet Sets the destination IP address of a socket
TCPIP_UDP_Discard Discards any remaining RX data from a UDP socket.
TCPIP_UDP_Flush Transmits all pending data in a UDP socket.
TCPIP_UDP_Get Reads a byte from the UDP socket.
TCPIP_UDP_GetIsReady Determines how many bytes can be read from the UDP socket.
TCPIP_UDP_IsConnected Determines if a socket has an established connection.
TCPIP_UDP_OptionsGet Allows getting the options for a socket like: current Rx/Tx buffer size, etc
TCPIP_UDP_OptionsSet Allows setting options to a socket like adjust Rx/Tx buffer size, etc
TCPIP_UDP_Put Writes a byte to the UDP socket.
TCPIP_UDP_RemoteBind Bind a socket to a remote address This function is meant for server
sockets.
TCPIP_UDP_RxOffsetSet Moves the pointer within the RX buffer.
TCPIP_UDP_ServerOpen Opens a UDP socket as a server.
TCPIP_UDP_SocketInfoGet Points handle at socket unfo for socket hUDP
TCPIP_UDP_SocketNetGet Gets the network interface of an UDP socket
TCPIP_UDP_SocketNetSet Sets the network interface for an UDP socket
TCPIP_UDP_SourceIPAddressSet Sets the source IP address of a socket
TCPIP_UDP_StringPut Writes null-terminated string to the UDP socket.
TCPIP_UDP_TxCountGet Returns the amount of bytes written into the UDP socket.
TCPIP_UDP_TxOffsetSet Moves the pointer within the TX buffer.
TCPIP_UDP_TxPutIsReady Determines how many bytes can be written to the UDP socket.
UDPIsPutReady Determines how many bytes can be written to the UDP socket.
Macros
Name Description
INVALID_UDP_SOCKET Indicates a UDP socket that is not valid
TCPIP_UDP_IsOpened backward compatibility call
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Structures
Name Description
UDP_MODULE_CONFIG UDP layer configuration/initialization
UDP_SOCKET_INFO Information about a socket
Types
Name Description
UDP_PORT Stores a UDP Port Number
UDP_SOCKET Provides a handle to a UDP Socket
5.8.28.8.2 udp_config.h
User Datagram Protocol (UDP) Configuration file
This file contains the UDP module configuration options
Macros
Name Description
UDP_LOCAL_PORT_END_NUMBER Last port number for randomized local port number selection
UDP_LOCAL_PORT_START_NUMBER The dynamic port range defined by IANA consists of the
49152-65535 range and is meant for the selection of ephemeral
ports (RFC 6056). Adjust to your needs but stay within the IANA
range First port number for randomized local port number selection
UDP_MAX_SOCKETS global number of UDP sockets created dynamically
UDP_SOCKET_DEFAULT_TX_QUEUE_LIMIT the maximum number of packets that can be queued by an UDP
socket at a certain time. For sockets that need to transfer a lot of
data (iperf, for example), especially on slow conenctions this limit
prevents running out of memory because the MAC transfer cannot
keep up with the UDP packet allocation rate imposed by the
aapplication. Adjust depending on the
UDP_SOCKET_DEFAULT_TX_SIZE, the connection speed and
the amount of memory available to the stack.
UDP_SOCKET_DEFAULT_TX_SIZE default socket Tx buffer size
UDP_SOCKET_POOL_BUFFER_SIZE size of the buffers in the UDP pool any UDP socket that is enabled
to use the pool and has the TX size <= than this size can use a
buffer from the pool
UDP_SOCKET_POOL_BUFFERS use 0 to disable the feature
UDP_USE_RX_CHECKSUM check incoming packets to have proper checksum
UDP_USE_TX_CHECKSUM This slows UDP TX performance by nearly 50%, except when
using the ENCX24J600, which has a super fast DMA and incurs
virtually no speed pentalty.
5.8.29 Zeroconf TCP/IP Stack Library
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5.8.29.1 Introduction
Zero Configuration (Zeroconf) TCP/IP Stack Library
for
Microchip Microcontrollers
This library provides the API of the Zero Conf TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
Zero configuration (Zeroconf), provides a mechanism to ease the configuration of a device on a network. It also provides for a
more human-like naming convention, instead of relying on IP addresses alone. Zeroconf also goes by the names Bonjour
(Apple) and Avahi (Linux), and is an IETF standard.
5.8.29.2 Release Notes
MPLAB Harmony Version: v0.70b Zero Conf TCP/IP Stack Library Version : 1.0 Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.8.29.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.8.29.4 Using the Library
This topic describes the basic architecture of the Zeroconf TCP/IP Stack Library and provides information and examples on how
to use it.
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Interface Header Files: zero_conf_helper.h, zero_conf_link_local.h, and zero_conf_multicast_dns.h
The interface to the Zeroconf TCP/IP Stack library is defined in the "zero_conf_helper.h", "zero_conf_link_local.h", and
"zero_conf_multicast_dns.h" header files. This file is included by the "tcpip.h" file. Any C language source (.c) file that uses the
Zeroconf TCP/IP Stack library should include "tcpip.h".
Library File:
The Zeroconf TCP/IP Stack library archive (.a) file installed with MPLAB Harmony.
Please refer to the MPLAB Harmony Overview for how the TCP/IP Stack interacts with the framework.
5.8.29.4.1 Abstraction Model
This library provides the API of the Zeroconf TCP/IP Module that is available on the Microchip family of microcontrollers with a
convenient C language interface. It is a module that belongs to the TCP/IP stack.
Description
Zero Conf Software Abstraction Block
Note: This image was not available at time of release and will be added in a future release of MPLAB Harmony.
5.8.29.4.2 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Zeroconf module.
Library Interface Section Description
Multicast DNS Functions This section provides multicast DNS interface routines to Zeroconf
Link Local Functions This section provides Link Local interface routines to Zeroconf
Data Types and Constants This section provides various definitions describing this API
5.8.29.4.3 Core Functionality
5.8.29.4.3.1 Enabling
Zeroconf can be enabled by setting the following two defines in TCPIPConfig.h:
• STACK_USE_ZEROCONF_LINK_LOCAL
• STACK_USE_ZEROCONF_MDNS_SD
Currently, the use of Zeroconf is limited to the W-iFi demo applications (and the MRF24WB0M module). Future versions of the
stack should enable Zeroconf support across all Ethernet solutions.
5.8.29.4.3.2 Link Local (Zeroconf)
The first component of Zeroconf is the ability to self-assign an IP address to each member of a network. Normally, a DHCP
server would handle such situations. However, in cases where no DHCP server exists, Zeroconf enabled devices negotiate
unique IP addresses amongst themselves.
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5.8.29.4.3.3 mDNS
The second component of Zeroconf is the ability to self-assign human-readable hostnames for themselves. Multicast DNS
provides a local network the ability to have the features of a DNS server. Users can use easily remembered hostnames to
accesses the devices on the network. In the event that devices elect to use the same hostname, as in the IP address resolution,
each of the devices will auto-negotiate new names for themselves (usually by appending a number to the end of the name).
5.8.29.4.3.4 Service Discovery
The last component of Zeroconf is service discovery. All Zeroconf devices can broadcast what services they provide. For
instance, a printer can broadcast that it has printing services available. A thermostat can broadcast that it has an HVAC control
service. Other interested parties on the network who are looking for certain services can then see a list of devices that have the
capability of providing the service, and connect directly to it. This further eliminates the need to know whether something exists
on a network (and what it's IP or hostname is). As an end-user, all you would need to do is query the network if a certain service
exists, and easily connect to it.
5.8.29.4.3.5 Demonstration
The demo, when enabled, shows all three items above working together. Each development kit in the network assumes the
hostname of MCHPBOARD-x.local, where x is an incrementing number from 1 (only in the case where multiple kits are
programmed for the network). Each board will broadcast it's service, which is the DemoWebServer.
5.8.29.4.3.6 Zeroconf Enabled Environments
All Apple products have Zeroconf enabled by default. On Windows, you'll need to download the Safari web browser, and during
the install, enable support for Bonjour. Note that in the Safari browser, you can browse and see a list of all Bonjour enabled
devices, and click through to them automatically.
5.8.29.5 Configuring the Library
The configuration of the Zeroconf TCP/IP Stack Library is based on the file tcpip_config.h
This header file contains the configuration selection for the Zeroconf TCP/IP Stack Library. Based on the selections made, the
Zeroconf TCP/IP Stack Library will support or not support selected features. These configuration settings will apply to all
instances of the Zeroconf TCP/IP Stack Library.
This header can be placed anywhere; however, the path of this header needs to be present in the include search path for a
successful build. Refer to the Applications Overview section for more details.
5.8.29.6 Building the Library
This section list the files that are available in the \src of the Zeroconf driver. It lists which files need to be included in the build
based on either a hardware feature present on the board or configuration option selected by the system.
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5.8.29.7 Library Interface
Data Types and Constants
Name Description
MDNSD_ERR_CODE void DisplayHostName(uint8_t *HostName);
ZCLL_MODULE_CONFIG Placeholder for Zero Configuration Link Layer module configuration.
Link Local Functions
Name Description
TCPIP_ZCLL_Disable disables the ZCLL on an interface
TCPIP_ZCLL_Enable enables ZCLL on an interface
TCPIP_ZCLL_IsEnabled returns true if ZCLL is currently enabled on that interface
Multicast DNS Functions
Name Description
TCPIP_MDNS_ServiceDeregister DNS-Service Discovery API for end-user to De-register a
service-advertisement, which was previously registered with
TCPIP_MDNS_ServiceRegister API.
TCPIP_MDNS_ServiceRegister DNS-Service Discovery API for end-users to register a service-advertisement.
The service is associated with all interfaces.
TCPIP_MDNS_ServiceUpdate DNS-Service Discovery API for end-user to update the service -advertisement,
which was previously registered with TCPIP_MDNS_ServiceRegister
Description
This section describes the Application Programming Interface (API) functions of the Zeroconf TCP/IP Stack.
Refer to each section for a detailed description.
5.8.29.7.1 Multicast DNS Functions
5.8.29.7.1.1 TCPIP_MDNS_ServiceDeregister Function
C
MDNSD_ERR_CODE TCPIP_MDNS_ServiceDeregister(
TCPIP_NET_HANDLE netH
);
Description
This API is used by end-user application to de-register DNS-Service Discovery on a local network. When this gets invoked by
end-user DNS-SD stack sends out Good-Bye packets to update all peer machines that service will no longer be present. All peer
machines remove the corresponding entry from Browser list.
This is the last API that needs to be invoked by end-user application to free-up the DNS-SD stack for some other app.
Preconditions
TCPIP_MDNS_ServiceRegister must be invoked before this call.
Parameters
Parameters Description
netH handle of the network to be de-registered
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Returns
MDNSD_ERR_CODE - Returns Error-code to indicate registration is success or not. 1) MDNSD_SUCCESS - returns on
success of call 2) MDNSD_ERR_INVAL - When the input parameters are invalid or if the API is invoked in invalid state
5.8.29.7.1.2 TCPIP_MDNS_ServiceRegister Function
C
MDNSD_ERR_CODE TCPIP_MDNS_ServiceRegister(
TCPIP_NET_HANDLE netH,
const char * srv_name,
const char * srv_type,
uint16_t port,
const uint8_t * txt_record,
uint8_t auto_rename,
void (*call_back)(char *name, MDNSD_ERR_CODE err, void *context),
void * context
);
Description
DNS-Service Discovery APIs
************************************************************
This API is used by end-user application to announce its service on local network. All peer machines that are compliant with
Multicast-DNS & DNS-Service Discovery protocol can detect the announcement and lists out an entry in Service-Browser list.
End-User selects an entry to connect to this service. So ultimately this is an aid to end-user to discover any service of interest on
a local network.
This is the first API that needs to be invoked by end-user application. Presently Multicast-DNS & Service-discovery stack
supports only single service-advertisement. Once the application wants to terminate the service it has to invoke
TCPIP_MDNS_ServiceDeregister() API to free-up the DNS-SD stack for some other application.
Preconditions
None
Parameters
Parameters Description
netH handle of the network to be registered
srv_name Service Name, which is being advertised
srv_type For a HTTP-Service its "_http._tcp.local"
_http is application protocol preceeded with under-score
_tcp is lower-layer protocol on which service runs
local is to represent service is on local-network
For a iTunes Music Sharing "_daap._tcp.local" For a Priniting Service
"_ipp._tcp.local" Refer to http://www.dns-sd.org/ServiceTypes.html for more
service types
port Port number on which service is running
txt_len For additional information about service like default page (eg "index.htm") for
HTTP-service. Length of such additional information
txt_record String of additional information (eg "index.htm") for HTTP-service.
auto_rename A flag to indicate DNS-SD stack, whether to rename the service automatically or
not. If this is set to '0' Callback parameter will be used to indicate the conflict error
and user has to select different name and re-register with this API. If this is set to
'1' service-name will be automatically renamed with numerical suffix.
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callback Callback function, which is user-application defined.
This callback gets invoked on completion of
service
advertisement. If an service name-conflit error is detected and auto_rename is set
to '0' callback gets invoked with MDNSD_ERR_CONFLICT as error-code.
context Opaque context (pointer to opaque data), which needs to be used in callback
function.
Returns
MDNSD_ERR_CODE - Returns Error-code to indicate registration is success or not. 1) MDNSD_SUCCESS - returns on
success of call 2) MDNSD_ERR_BUSY - When already some other service is being advertised using this DNS-SD stack 3)
MDNSD_ERR_INVAL - Invalid Parameter
5.8.29.7.1.3 TCPIP_MDNS_ServiceUpdate Function
C
MDNSD_ERR_CODE TCPIP_MDNS_ServiceUpdate(
TCPIP_NET_HANDLE netH,
uint16_t port,
const uint8_t * txt_record
);
Description
This API is used by end-user application to update its service which was previously registered. With this API end-user app
update the port number on which the service is running. It can update the additional information of service. For example: the
default page can be updated to new page and corresponding page name can be input to this API to update all peer machines.
The modified service will be announced with new contents on local network.
This is an optional API and hsould be invoked only if it is necessary.
Preconditions
TCPIP_MDNS_ServiceRegister must be invoked before this call.
Parameters
Parameters Description
netH handle of the network to perform the service update
port Port number on which service is running
txt_record String of additional information (eg "index.htm") for HTTP-service.
Returns
MDNSD_ERR_CODE - Returns Error-code to indicate registration is success or not. 1) MDNSD_SUCCESS - returns on
success of call 2) MDNSD_ERR_INVAL - When the input parameters are invalid or if the API is invoked in invalid state
5.8.29.7.2 Link Local Functions
5.8.29.7.2.1 TCPIP_ZCLL_Disable Function
C
bool TCPIP_ZCLL_Disable(
TCPIP_NET_HANDLE hNet
);
Description
disables the ZCLL on an interface
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5.8.29.7.2.2 TCPIP_ZCLL_Enable Function
C
bool TCPIP_ZCLL_Enable(
TCPIP_NET_HANDLE hNet
);
Description
enables ZCLL on an interface
5.8.29.7.2.3 TCPIP_ZCLL_IsEnabled Function
C
bool TCPIP_ZCLL_IsEnabled(
TCPIP_NET_HANDLE hNet
);
Description
returns true if ZCLL is currently enabled on that interface
5.8.29.7.3 Data Types and Constants
5.8.29.7.3.1 MDNSD_ERR_CODE Enumeration
C
typedef enum {
MDNSD_SUCCESS = 0,
MDNSD_ERR_BUSY = 1,
MDNSD_ERR_CONFLICT = 2,
MDNSD_ERR_INVAL = 3
} MDNSD_ERR_CODE;
Description
void DisplayHostName(uint8_t *HostName);
Members
Members Description
MDNSD_ERR_BUSY = 1 Already Being used for another Service
MDNSD_ERR_CONFLICT = 2 Name Conflict
MDNSD_ERR_INVAL = 3 Invalid Parameter
5.8.29.7.3.2 ZCLL_MODULE_CONFIG Structure
C
typedef struct {
} ZCLL_MODULE_CONFIG;
Description
Placeholder for Zero Configuration Link Layer module configuration.
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5.8.29.8 Files
Files
Name Description
zero_conf_link_local.h
zero_conf_multicast_dns.h This is file zero_conf_multicast_dns.h.
Description
5.8.29.8.1 zero_conf_link_local.h
Zero Confiruation (Zeroconf) IPV4 Link Local Addressing Module for Microchip TCP/IP Stack
Functions
Name Description
TCPIP_ZCLL_Disable disables the ZCLL on an interface
TCPIP_ZCLL_Enable enables ZCLL on an interface
TCPIP_ZCLL_IsEnabled returns true if ZCLL is currently enabled on that interface
Structures
Name Description
ZCLL_MODULE_CONFIG Placeholder for Zero Configuration Link Layer module configuration.
5.8.29.8.2 zero_conf_multicast_dns.h
This is file zero_conf_multicast_dns.h.
Enumerations
Name Description
MDNSD_ERR_CODE void DisplayHostName(uint8_t *HostName);
Functions
Name Description
TCPIP_MDNS_ServiceDeregister DNS-Service Discovery API for end-user to De-register a
service-advertisement, which was previously registered with
TCPIP_MDNS_ServiceRegister API.
TCPIP_MDNS_ServiceRegister DNS-Service Discovery API for end-users to register a service-advertisement.
The service is associated with all interfaces.
TCPIP_MDNS_ServiceUpdate DNS-Service Discovery API for end-user to update the service -advertisement,
which was previously registered with TCPIP_MDNS_ServiceRegister
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5.9 USB Library Help
5.9.1 USB Device Library - Getting Started
5.9.1.1 Introduction
Provides an introduction to the MPLAB Harmony USB Device Library
Description
The MPLAB Harmony USB Device Library (referred to as the USB Device Library) provides embedded application developers
with a framework to design and develop a wide variety of USB Devices. A choice of Full Speed only or Full Speed and Hi-Speed
USB operations are available, depending on the selected PIC32 microcontroller. The USB Device Library facilitates development
of standard USB devices through function drivers that implement standard USB Device class specification. Custom USB devices
can also be implemented via a Generic Function driver. The USB Device Library is modular, thus allowing application developers
to readily design composite USB devices. The USB Device Library is a part of the MPLAB Harmony installation and is
accompanied by demonstration applications that highlight library usage. These demonstrations can also be modified or updated
to build custom applications. The USB Device Library also features the following:
- Support for different USB device classes (CDC, Audio, HID, MSC and Generic)
- Supports multiple instance of the same class in a composite device
- Supports multiple configurations at different speeds
- Supports full speed and high speed operation
- Supports multiple USB peripherals (allows multiple device stacks)
- Modular and Layered architecture
- Supports deferred control transfer responses.
- Completely non-blocking
- Supports both polled and interrupt operation.
- Works readily in an RTOS environment.
This document serves as getting started guide and provides information on the following:
- USB Device Stack Architecture
- USB Device Library - Application Interaction
- Creating your own USB device
Note: This document assumes that the reader is familiar with the USB 2.0 specification (available at www.usbif.org). While the
document, for the sake completeness, does cover certain aspects of the USB 2.0 protocol, it is recommended that the reader
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refer to the specification for a complete description of USB operation.
5.9.1.2 Release Notes
MPLAB Harmony Version: v0.70b Release Date: 18Nov2013
New This Release:
Nothing to report in this release.
Known Issues:
• USB Device Stack:
• Limited USB chapter 9 testing performed on HID and MSD function drivers.
• The stack has not been tested for USB Interoperability.
• The USB Device Stack has not been tested with a Real Time Operating System.
• Attach/Detach behavior has been tested in a limited capacity.
• The device stack only supports interrupt mode operation. Polled mode operation will be added in a future release.
• While running the device stack on PIC32MZ microcontroller, the stack requires 3 seconds to initialize. This is due to a
hardware issue with PIC32MZ USB module.
• Device stack operation has been tested with Windows XP and Windows 7 OS based PC USB Host.
• The USB_DEVICE_ResumeStart() and USB_DEVICE_ResumeStop() functions are not implemented.
• USB Host Stack:
• The host Stack has not been tested with a Real Time Operating System.
• Attach/Detach behavior has been tested in a limited capacity.
• The host stack only supports interrupt mode operation. Polled mode operation will be added in a future release.
• While running the host stack on PIC32MZ microcontroller, the stack requires 3 seconds to initialize. This is due to a
hardware issue with PIC32MZ USB module. The 3 second delay is implemented using a while loop. This will replaced with
System Timer services in the next release.
• MSD Host has been tested with a limited number of commercially available USB Flash Drives.
• MSD Host and the USB Host Layer have not been tested for read/write throughput. This will be done in a future release.
• Host stack has not been tested with low speed devices.
• The PIC32MZ host layer performs direct access of Timer 2 peripheral SFR, for its timing requirements. This will be
replaced with Harmony System Timer services in the next release of the host stack.
• USB_HOST_DeviceSuspend() and the USB_HOST_DeviceResume() functions are not implemented.
5.9.1.2.1 Previous Versions
5.9.1.2.1.1 v0.51b
Release notes for version 0.51b of the MPLAB Harmony USB Stack.
Description
New features in this release:
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• Added Device Stack support for Mass Storage device class.
• Added Device Stack support for Audio Device class.
• Added demonstration applications for Audio and Mass Storage Device classes.
• Added support for PIC32MZ devices and High Speed operation.
• HID Basic Demonstration application tested for USB 2.0 chapter-9 conformance.
• MSD Basic Demonstration application tested for USB2.0 chapter-9 conformance.
• First Release of Host Layer and CDC Host Driver along with a demonstration application.
Limitations and Known Issues:
The following are the known issues in this release. These issues will be fixed in the subsequent releases of the MPLAB Harmony
USB Stack.
• The USB device stack is tested with Windows environment only. Performance and working of the device stack is not tested
with other OS environments.
• The stack is not thoroughly tested for inter operability with other USB devices when connected to hub along with other devices.
• All demos are tested in dynamic interrupt mode only.
• Limited testing is done with hub.
• Limited testing is done with RTOS.
• APIs may change in subsequent releases and are not final.
• PIC32MZ USB Driver supports only on instance of the USB peripheral.
• The Mass Storage Device Class demonstration application works with Windows XP OS only.
• The Audio Speaker demo may not restart audio playback if the playback is paused from the PC.
• The CDC Host layer has been in tested in a limited capacity.
• PIC32MZ and Hi-Speed USB support is tested with CDC and HID device classes only.
• HID Keyboard demonstration application does not receive output report from PC USB host.
5.9.1.2.1.2 v0.51.02b
Release notes for the current version of the MPLAB Harmony USB Stack
Description
New features in this release:
• Updated documentation to include a Getting Started with USB Device Library.
• Updated the documentation for CDC and HID Function Drivers. Improved code size and RAM requirement of the demos.
• The following issues from the v0.51b are fixed in this release
• HID Keyboard demonstration application does not receive output report from PC USB host.
• The Audio Speaker demo may not restart audio playback if the playback is paused from the PC.
• The Mass Storage Device Class demonstration application works with Windows XP OS only. The demo now works with
Windows 7.
Limitations and Known Issues:
The following are the known issues in this release. These issues will be fixed in the subsequent releases of the MPLAB Harmony
USB Stack.
• The USB device stack is tested with Windows environment only. Performance and working of the device stack is not tested
with other OS environments.
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• The stack is not thoroughly tested for inter operability with other USB devices when connected to hub along with other devices.
• All demos are tested in dynamic interrupt mode only.
• Limited testing is done with hub. Limited testing is done with RTOS.
• Audio Speaker demo may not work with all USB Hosts. This has been observed with faster PC Hosts.
• APIs are not final and may change in subsequent releases.
• PIC32MZ USB Driver supports only on instance of the USB peripheral.
• The CDC Host layer has been in tested in a limited capacity.
• PIC32MZ and Hi-Speed USB support is tested with CDC and HID device classes only.
• Polling operation is not implemented
• Static USB Controller Driver is not available.
5.9.1.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.9.1.4 USB Device Library Architecture
Describes the USB Device Library Architecture.
Description
The USB Device Library features a modular and layered architecture. This is shown in figure 1.
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Figure 1: USB Device Library Architecture
As seen in figure 1, the USB Device Library consists of the 3 major components
1. The USB Controller Driver (USBCD) manages the state of the USB peripheral and provides the Device Layer with structured
data access methods to the USB. It also provides the device layer with USB events. The USBCD is a MPLAB Harmony driver
and uses the Harmony framework components (the USB peripheral Library, the Interrupt System Service) for its operation. It
supports only one client per instance of the USB Peripheral. This client would typically be the Device Layer. In case of multiple
USB peripherals, the USBCD can manage multiple USB peripherals, each being accessed by one client. The driver is accessed
exclusively by the Device Layer in the USB Device Layer Architecture. It is initialized by the Device Layer (when the Device
Layer is initialized) and in case of polling operation, it's Tasks routine is called by the Device Layer. The USBCD provides
functions to
- enable, disable and stall endpoints
- schedule USB transfers.
- attach or detach the device
- control resume signalling
2. The Device Layer responds to the enumeration requests issued by the USB host. It has exclusive access to an instance of
the USBCD and Endpoint 0 which is the control endpoint. When the host issues a class specific control transfer request, the
Device Layer will analyze the setup packet of the control transfer and will route the control transfer to the appropriate function
driver. The Device Layer must be initialized with the following data:
- Master Descriptor Table: This is a table of all the configuration descriptors and string descriptors.
- Function Driver Registration Table : This table contains information about the function drivers in the application
- USBCD initialization information: This specifies the USB peripheral interrupt, the USB Peripheral instance and sleep mode
operation options.
The Device Layer initializes all function drivers that are registered with it when it receives a Set Configuration (for a supported
configuration) from the host. It de-initializes the function drivers when a USB reset event occurs. It initializes the USBCD, opens
it and registers a event handler to receive USB events. The Device Layer can also be opened by the application (the application
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becomes a client to the Device Layer). The application can then receive bus and device events and respond to control transfer
requests. The Device Layer provides events to the application such as device configured or device reset. The application must
then respond appropriately to these events.
3. The Function Drivers implements various USB device classes as per the class specification. The USB Device Library
architecture can support multiple instances of a function driver. An example would be a USB CDC device that emulates 2 serial
ports. Function drivers provide an abstracted and an easy to use interface to the application. The application must register an
event handler with the function driver to receive function driver events and must respond to some of these events with control
transfer read/write functions. Function driver access the bus through the Device Layer.
5.9.1.5 USB Device Library - Application Interaction
Describes how the application must interact with the USB Device Stack
Description
Figure 2 highlights the steps that the application must follow in order to use the USB Device Library.
Figure 2: Application Interaction with Device Layer
The application must first initialize the Device Layer. As a part of the Device Layer initialization process, the Device Layer
initialization structure must be defined which in turn requires the following data structures to be designed
- The master descriptor table
- The function driver registration table
Figure 3 shows a pictorial representation of the data that forms the Device Layer initialization structure. Additional information on
Device Layer initialization is available in the Device Layer Help File.
Figure 3. Device Layer Initialization
After successful initialization of the device layer, the application can open the device layer and register a device layer event
handler. The device layer event handler receives device level events such as device configured, device de-configured, device
reset and device suspended. The device configured event and de-configured event are important. The application can use the
device deconfigured event to re-initialize its internal state machine. When the application receives a device configured event, it
must register event handlers for each function driver that is relevant to the configuration that was set. The function driver event
handler registration must be done in the device configured event context because the device layer acknowledges the set
configuration request from the host when it exits the device configured event handler context. The application at this point should
be ready to respond to function driver events which require application intervention.
Note: Not registering the function driver event handler in the device layer device configured event could cause the device to not
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respond to the host requests and hence be non-compliant.
Once configured, the device is now ready to serve it intended function on the USB. The application interacts with the device layer
and function drivers through API function and event handlers. The application must be aware of function driver events which
require application response. For example, the USB_DEVICE_CDC_EVENT_SET_LINE_CODING event from the CDC Function
Driver requires the application to respond with a USB_DEVICE_CDC_ControlRead() function. This function provides the buffer
to accept the line coding parameters that the host will be provide in the data stage of the Set Line Coding control transfer. Figure
4 shows the application interaction with device layer and function driver after the device has been configured.
Figure 4: Application - Device Layer Interaction after device configuration
In figure 4, the application should have registered the device layer event handler before attaching the device on the bus. It
should have registered the function driver event handler before exiting the device configured - device layer event. The
application will then receive function driver instance specific events via the function driver event handlers.
Deferring Control Transfer Responses:
Some function driver events require the application to respond to the data stage and/or the status stage of the function driver
(class) specific control transfer associated with the event. The application responds to the data stage by specifying a buffer that
either contains the data that needs to sent to host (control read) or will contain the data that host sends to the device (control
write). In case of a control write, the application may wish to inspect the data which was received from the host and the
acknowledge or stall the status stage of the control transfer. In such cases, it is possible that the application may not be ready
within the function driver event handler context, with data that needs to be sent in the control read transfer or the success/ failure
decision in response to the control write transfer. Performing extended processing or waiting for external hardware within the
function driver event handler context is not recommended as USB 2.0 specification places restrictions on the control transfer
response time.
In cases where the application is not ready to respond to control transfer requests within the function driver event handler
context, the USB Device Library provides the option of deferring the response to the event. The application can respond to the
control transfer request out of function driver event handler context. The function driver generates a control transfer handle,
which the application must use while responding to the function driver event outside the event handler context. The application
must still observe the USB 2.0 specification control transfer timing requirements while responding to the control transfer.
Deferring the response in such a manner provides the application with flexibility to analyze the control transfer without affecting
the dynamic response of the device.
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5.9.1.6 Creating Your Own USB Device
Describes how to create a USB device with MPLAB Harmony USB Device Library
Description
The first step in creating a USB device is identifying if the desired device function fits into any of the standard USB device class
functions. Using standard USB classes may be advantageous as major operating systems feature ready Host driver support for
standard USB devices. The application may however not wish to tolerate the overhead associated with standard USB device
class protocols, in which case, a custom USB device can be implemented. A custom USB device can be implemented by using
the Generic Device function driver in the USB Device Library, but these devices will requires development of host drivers for their
operation. Having identified the device class to be used, the following approaches are available for developing a USB device by
using the USB Device Library.
1. Use the available library demonstration applications. The USB Device Library release package contains a set of demo
applications which are representative of common USB devices. These can be modified easily to include application specific
initialization and application logic. The application logic must be non-blocking and could be implemented as a state machine.
- The application specific initialization can be called in the SYS_Initialize() function (in the sys_init.c file). The SYS_Initialize is
called when the device comes out of power on reset.
- The application logic can be called in the SYS_Tasks() function (in the sys_tasks.c file). The application logic can interact with
the function driver and the device layer by using relevant API calls.
- The application logic can track device events by processing the events in the application USB device event handler function
(APP_USBDeviceEventHandler() function in app.c).
2. Build a USB Device Library application from scratch. In a case where the available demo applications do not meet the
end application requirements, a USB device can be created by building a USB Device Library application from scratch. Figure 5
shows a flowchart for the steps that need to be followed to do this.
Figure 5: Steps to create a USB Device Library Application
Step 1:
Create a MPLAB Project and add the required USB Device Library file to the project. The following files are needed to build the a
USB Device Library project
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- system_config.h - This file should contain the compile time configuration macros for the Function Driver, Device Layer and
Controller Driver. Refer to the "Configuring the Library" section in the documentation
- usb_device.c - This is the device layer implementation
- drv_usb.c and drv_usb_device.c - These files implement the USB device mode Controller Driver.
- sys_int_pic32.c and plib_int_pic32.c - These files implement the system interrupt service that is required by the USBCD.
- function driver implementation files - This depends on the USB device function being implemented. The "Using the Library"
section in the function driver specific help file provides more details on the files to be included while using the function driver.
- Application specific files - These file will implement the application logic
Step 2:
Setup the fuse configuration bits to enable PLL. The code snippets below can be used to do this for PIC32MX and PIC32MZ
processors
/*************************************************************
* The following code snippet shows the USB PLL related
* fuse configuration bits for PIC32MX processors. A 8MHz
* external crystal/oscillator is assumed.
***************************************************************/
#pragma config UPLLEN = ON /* Enable USB PLL */
#pragma config UPLLIDIV = DIV_2 /* USB PLL input divider */
/*************************************************************
* The following code snippet shows the USB PLL related
* fuse configuration bits for PIC32MZ processors. A 24MHz
* external crystal/oscillator is assumed.
***************************************************************/
#pragma config UPLLFSEL = FREQ_24MHZ // USB PLL Input Frequency Selection
#pragma config UPLLEN = ON
Step 3:
Design the USB Device, Configuration and Class specific descriptors that are required for successful enumeration of the USB
device. These should comply with the USB 2.0 specification. Class Specific descriptors should comply with the class
specifications. The device and configuration descriptors should be added to the Master Descriptor Table. A Function Driver
Registration Table should be created and registered with the Device Layer. The function driver registration table associates
instance of a function driver with a Device Layer instance. Refer to "Setting up Master Descriptor Table" and "Function Driver
Registration" in the Device Layer help file for more information.
Step 4:
The application should create a Device Layer Event Handler which will handle all the events generated by the Device Layer. The
following code snippet shows a list of all possible events that are generated by the Device Layer. The code snippet can be used
in the application and updated to meet the application requirements. Refer to "Device Events" in the Device Layer documentation
for more details on the Device Layer Event Handling.
void APP_USBDeviceEventHandler(USB_DEVICE_EVENT event, USB_DEVICE_EVENT_DATA * eventData)
{
switch(event)
{
case USB_DEVICE_EVENT_RESET:
break;
case USB_DEVICE_EVENT_DECONFIGURED:
break;
case USB_DEVICE_EVENT_CONFIGURED:
break;
case USB_DEVICE_EVENT_SUSPENDED:
break;
case USB_DEVICE_EVENT_RESUMED:
break;
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case USB_DEVICE_EVENT_ATTACHED:
break;
case USB_DEVICE_EVENT_DETACHED:
break;
case USB_DEVICE_EVENT_ERROR:
break;
default:
break;
}
}
Step 5:
The application should create a Function Driver Event Handler which will handle all the events generated by the Function Driver.
Refer to "Event Handling" section in the applicable function driver documentation for more details on the Function Driver Event
Handling.
Step 6:
If the application intends to operate the USB Device Library in polling mode, the a interrupt service routine is not required. If the
application intends to operate in interrupt mode, a USB Interrupt Handler should be defined as shown here:
/* Use this for PIC32MX */
void __ISR ( _USB_1_VECTOR ) _InterruptHandler_USB_stub ( void )
{
DRV_USB_Tasks_ISR((SYS_MODULE_OBJ)0);
}
/* Use this for PIC32MZ */
void __ISR ( _USB_VECTOR,ipl4 ) _InterruptHandler_USB_stub ( void )
{
DRV_USB_Tasks_ISR((SYS_MODULE_OBJ)0);
}
Step 7:
The application should create a while(1) loop that continuously updates the USB Device Layer State machine and the application
state machine. This requires the application state machine to be non-blocking.
/* This while(1) loop will continuously update Device Layer State machine
* and the application state machine */
while(1)
{
USB_DEVICE_Tasks(deviceLayerObject);
APP_Tasks();
}
Step 8:
If interrupt based operation is needed, the interrupts need to be enabled first. The application should then initialize and open the
device layer. When the device layer is opened successfully, a device layer event handler can be registered. The device can then
be attached on the bus. Refer to the "Initializing the Library" section in the USB Device Layer documentation for more details on
initializing the USB Device Layer
/* Initialize the interrupt system */
SYS_INT_Initialize();
/* Initialize the global interrupts */
SYS_INT_Enable();
SYS_INT_VectorPrioritySet(INT_VECTOR_USB, INT_PRIORITY_LEVEL3);
SYS_INT_VectorSubprioritySet(INT_VECTOR_USB, INT_SUBPRIORITY_LEVEL3);
/* Initialize the USB device layer */
deviceLayerObject = USB_DEVICE_Initialize (USB_DEVICE_INDEX_0 ,
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( SYS_MODULE_INIT* ) & usbDevInitData);
/* check if the object returned by the device layer is valid */
SYS_ASSERT((SYS_MODULE_OBJ_INVALID != deviceLayerObject), "Invalid USB DEVICE object");
/* Open an instance of the device layer */
appData.deviceHandle = USB_DEVICE_Open( USB_DEVICE_INDEX_0,
DRV_IO_INTENT_READWRITE );
/* Register a callback with device layer to get
* event notification (for end point 0) */
USB_DEVICE_EventCallBackSet(appData.deviceHandle, APP_USBDeviceEventHandler);
/* Attach the device */
USB_DEVICE_Attach(appData.deviceHandle);
5.9.1.7 USB Device Stack Migration Guide
5.9.1.7.1 Introduction
This topic provides information for migrating from USB Device from MLA to MPLAB Harmony.
5.9.1.7.2 Source Files to Include
This topic provides information on the source files to be included when migrating from USB device projects from MLA to MPLAB
Harmony.
Description
The following table lists the source files that must be included for MLA based and MPLAB Harmony based USB device projects.
In MLA there is no separate controller driver implementation. Both enumeration functionality and controller driver is implemented
in usb_device.c file. In MPLAB Harmony USB Device Stack, the controller driver is implemented in drv_usb.c and
drv_usb_device.c files and enumeration functionality is implemented in usb_device.c file.
MLA MPLAB Harmony Description
usb_device.c usb_device.c In MLA, this file contains enumeration functionality and controller
driver implementations.
In MPLAB Harmony, this file implements enumeration
functionality only.
usb_function_xxx.c
(Where xxx stands for
function driver name like
hid, msd, etc.)
usb_device_xxx.c
(Where xxx stands for function
driver name like hid, msd, etc.)
Contains all function driver implementations.
usb_descriptors.c system_config.c Contains USB stack configurations
N/A drv_usb.c and drv_usb_device.c USB peripheral driver implementation.
5.9.1.7.3 Initializing the USB Device Stack
This topic provides initialization information when migrating a USB device project from MLA to MPLAB Harmony.
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Description
In MLA, initializing the USB device stack consists of calling USB functions in the sequence shown in the following flow chart.
USBDeviceInit() function will initialize the USB Device stack. USBDeviceAttach() function will attach the device to bus.
USBDeviceTasks() function will run the stack task routine.
In MPLAB Harmony USB Device Stack, initializing the USB device stack consists of calling USB functions in the sequence
shown in the following chart.
The USB_DEVICE_Initialize() function will initialize the USB device stack. On successful initialization, this function returns a valid
system object. USB_DEVICE_Open() returns a client handle to the application. The application must use this client handle for
any further communication with the USB device stack. USB_DEVICE_Attach() function attaches the device to USB bus.
USB_DEVICE_Tasks() will run the task routine of the stack.
5.9.1.7.4 Configuring the Stack
This topic provides stack configuration information when migrating from a USB device project from MLA to MPLAB Harmony.
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Description
To configure the stack in MLA, USB descriptors have to be defined in the usb_descriptors.c file. The configuration is done in
usb_config.h. Where as in MPLAB Harmony, USB descriptors are defined in system_config.c. The MPLAB Harmony USB
Device Stack configuration is done in system_config.h. Apart from descriptors, user also will have to define a function registration
table and a master descriptor table in system_config.c. Refer to USB device help file of MPLAB Harmony for more information on
the function registration table and the master descriptor table.
5.9.1.7.5 Event Handling
This topic provides event handling information when migrating a USB device project from MLA to MPLAB Harmony.
Description
In MLA, user will have to handle events inside USER_USB_CALLBACK_EVENT_HANDLER function. Whereas in case of
MPLAB Harmony, user application client will have to register an event handler with the USB device stack using
USB_DEVICE_EventCallBackSet() function. All USB bus events are then forwarded to this user registered event handler
function. In case of multi client environment, it is possible for each client to register its own event handler with the USB stack.
This allows each application clients to individually manage the events separately. Following code snippet shows an example of
registering the event handler in case of MPAB Harmony stack using USB_DEVICE_EventCallBackSet() function. In the following
code snippet, APP_UsbDeviceEventCallBack() function is the application event handler.
The following code snippet shows the implementation of APP_UsbDeviceEventCallBack function.
5.9.1.7.6 Initializing and Communicating with the Endpoint
This topic provides endpoint initialization and communication information when migrating a USB device project from MLA to
MPLAB Harmony.
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Description
In MLA, user application will have to explicitly initialize the required endpoints and can directly read and write to the endpoints.
The following code snippet shows how MLA initializes the endpoints in event handler when the device is configured.
In case of MPLAB Harmony the user application has no direct access to endpoints. USB device layer initializes the endpoint and
any communication to endpoint must happen through function driver APIs. The USB device layer initializes the endpoint based
on the information provided by the user in the configurations descriptor. The USB device layer does this by parsing the
descriptors table at run time. So the user does not have to explicitly enable or disable the endpoint.
5.9.1.7.7 Handling Endpoint 0 (EP0) Packets
This topic provides information for handling Endpoint 0 packets when migrating a USB device project from MLA to MPLAB
Harmony.
Description
Standard device requests are handled by device stack in both MLA and MPLAB Harmony. The difference lies in handling class
specific requests. In MLA, the class specific requests are forwarded to the application as EP0 events and application forwards
them to appropriate function driver. The following code snippet shows how application forwards them to appropriate function
driver in the event handler.
In the case of MPLAB Harmony USB Device Stack, EP0 events are generated from appropriate function driver as meaningful
events. For example the HID function driver in MPLAB harmony parses the EP0 packet to generate events like
USB_DEVICE_HID_EVENT_GET_IDLE, USB_DEVICE_HID_EVENT_SET_REPORT and
USB_DEVICE_HID_EVENT_SET_IDLE etc.
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The following code snippet shows how the event handler callback is registered with the HID function driver using
USB_DEVICE_HID_EventHandlerSet() function.
The following code snippet shows the implementation of the HID event handler function in the application. Note how the HID
function driver converts EP0 requests to meaningful format for the application.
5.9.2 USB Audio Device Library
5.9.2.1 Introduction
Introduces the MPLAB Harmony USB Device Audio Library.
Description
This library provides a high-level abstraction of the Universal Serial Bus (USB) Audio Device Class function driver that is part of
the MPLAB Harmony USB stack with a convenient C language interface. This library supports revision 1.0 of the USB Audio
specification release by the USB Implementers forum.
The Audio Device Class Definition applies to all devices or functions embedded in composite devices that are used to
manipulate audio, voice, and sound-related functionality. This includes both audio data (analog and digital) and the functionality
that is used to directly control the audio environment, such as Volume and Tone Control. Audio device can also MIDI Data
stream through USB.
USB Audio is used with many applications related to voice telephony, audio playback, and recording eg:- Speaker, Microphone,
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Mixer etc.
The MPLAB Harmony USB Device Audio library offers services to the application to interact and respond to the host requests.
The MPLAB Harmony USB Device Audio library is also referred to as Audio function driver in this document.
5.9.2.2 Release Notes
MPLAB Harmony Version: v0.70b USB Audio Device Library Version : 0.01 Alpha Release Date: 18Nov2013
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
New This Release:
Nothing to report in this release.
Known Issues:
Nothing to report in this release.
5.9.2.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.9.2.4 Library Architecture
Provides an Architectural Overview of the Audio Function Driver.
Description
The USB Audio function driver offers various services to a USB Audio device to communicate with the host by abstracting USB
specification details. It must be used along with the USB Device layer and USB controller to communicate with the USB host.
Figure 1 shows a block diagram representation of the MPLAB Harmony USB Architecture and where the USB Audio Function
Driver is placed.
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Figure 1: USB Device Audio Function Driver
The USB controller driver takes the responsibility of managing the USB peripheral on the device. The USB device layer handles
the device enumeration etc. The Audio function driver receives The USB Device layer forwards all Audio specific control
transfers to the Audio Function Driver. The Audio Function Driver interprets the control transfers and requests application's
intervention through event handlers and well defined set of API. The application must respond to the Audio events either in or out
of the event handler. The application must interact directly with the Audio Function Driver to send/receive data and Audio Control
data.
5.9.2.5 Using the Library
5.9.2.5.1 Files to Include
Describes which files to include in project while using the Audio Function Driver.
Description
Table 2 shows the files that must be included in the project in order to use the Audio Function Driver. These files are located in
the framework folder of the MPLAB Harmony installation. It is assumed that the Device Layer files ( and the files needed by the
Device Layer) are already included in the project.
Filename Description
\framework\usb\src\dynamic\usb_device_audio.c This file contains all of functions, macros, definitions, variables, datatypes,
etc. that are required for usage with the USB device Audio function driver.
\framework\usb\usb_device_audio.h Must be included in every source file that needs to invoke Audio function
driver API.
system_config.h User created file which contains the Audio function driver configuration.
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Table 2: Files to be included in USB Audio Device Project.
5.9.2.5.2 Initializing the Library
Describes how Audio function driver is initialized.
Description
The Audio function driver instance for a USB device configuration is initialized by the Device Layer when the configuration is set
by the host. This process does not require application intervention. Each instance of the Audio function driver should be
registered with the Device layer through the Device Layer Function Driver Registration Table. The Audio function driver does not
require a initialization data structure.The funcDriverInit member of the function driver registration table entry for the Audio
function driver instance should be set to NULL. The audioFuncDriver object is a global object provided by the Audio function
driver and points to the Audio function driver - Device Layer interface functions which are required by the Device Layer. The
code snippet below shows an example of how multiple instances of Audio Function driver can registered with the Device Layer.
/* This code snippet shows an example of how an Audio function
* driver instances can be registered with the Device Layer
* via the Device Layer Function Driver Registration Table.
* In this case Device Configuration 1 consists of one Audio
* function driver instance. */
const USB_DEVICE_FUNC_REGISTRATION_TABLE funcRegistrationTable[1] =
{
{
.speed = USB_SPEED_FULL|USB_SPEED_HIGH, // Supported speed
.configurationValue = 1, // To be initialized for Configuration 1
.interfaceNumber = 0, // Starting interface number.
.numberOfInterfaces = 2, // Number of interfaces in this instance
.funcDriverIndex = 0, // Function Driver instance index is 0
.funcDriverInit = NULL, // Function Driver does not need
initialization data structure
.driver = &audioFuncDriver // Pointer to Function Driver - Device
Layer interface functions
},
};
The sequence for initializing the USB Audio Function driver is depicted in the Figure 2.
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Figure 2. USB Audio function driver Initialization
1. Call set of APIs to initialize USB Device Layer. Refer USB Device Layer documentation for details about these APIs.
2. The Device Layer provides a callback to the application for any USB Device events like attached, powered, configured etc.
The application should receive a callback with an event USB_DEVICE_EVENT_CONFIGURED to proceed.
3. Once the Device Layer is configured the application needs to register callback functions with USB Audio function driver to
receive Audio Control transfers and also other audio function driver events. Now the application can use audio function driver
APIs to communicate with USB Host.
5.9.2.5.3 Event Handling
Describes Audio function driver event handler registration and event handling.
Description
Registering Audio Function Driver callback functions:
While creating USB Audio Device based application, an event handler must be registered with the Device Layer (the Device
Layer Event Handler) and every Audio function driver instance (Audio Function Driver Event Handler). The application needs to
register two callback functions with Audio function driver
1. For receiving Audio Control Requests from Host like Volume Control, Mute Control etc.
2. For handling other events from Audio function driver. eg:- Data Write Complete or Data Read Complete
The callback functions should be registered before the USB device layer acknowledges the SET CONFIGURATION request
from the USB Host. In order to ensure this, the callback functions should be set in the USB_DEVICE_EVENT_CONFIGURED
event that is generated by the device layer. The code example below shows an example of how this can be done.
/* This a sample Application Device Layer Event Handler
* Note how the Audio Function Driver callback functions
* APP_AudioEntitySettingsCallback() and APP_AudioEventCallback()
* are registered in the USB_DEVICE_EVENT_CONFIGURED event. */
void APP_USBDeviceEventCallBack ( USB_DEVICE_EVENT event,
USB_DEVICE_EVENT_DATA * eventData )
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{
switch ( event )
{
case USB_DEVICE_EVENT_RESET:
case USB_DEVICE_EVENT_DECONFIGURED:
// USB device is reset or device is deconfigured.
// This means that USB device layer is about to deininitialize
// all function drivers.
break;
case USB_DEVICE_EVENT_CONFIGURED:
/* check the configuration */
if ( eventData->eventConfigured.configurationValue == 1)
{
/* Register the callback function for handling Audio Control requests.*/
USB_DEVICE_AUDIO_RegisterCallBacks (USB_DEVICE_CDC_INDEX_0 ,
APP_AudioEntitySettingsCallback ,
USB_DEVICE_AUDIO_CALLBACK_ENTITY_SETTINGS );
/* Register the callback function for handling Audio function driver Events*/
USB_DEVICE_AUDIO_RegisterCallBacks (USB_DEVICE_CDC_INDEX_0 ,
APP_AudioEventCallback ,
USB_DEVICE_AUDIO_CALLBACK_EVENTS );
/* mark that set configuration is complete */
appData.isConfigured = true;
}
break;
case USB_DEVICE_EVENT_SUSPENDED:
break;
case USB_DEVICE_EVENT_RESUMED:
case USB_DEVICE_EVENT_ATTACHED:
case USB_DEVICE_EVENT_DETACHED:
case USB_DEVICE_EVENT_ERROR:
default:
break;
}
}
Handling Audio Control Requests:
The audio function driver notifies the application by calling the provided callback function, whenever an Audio Control request is
received from USB Host. Below example shows how to handle Audio Control request.
// This code example shows handling Audio Control requests. The below handles a Mute request
(both SET
GET) received from USB Host.
//The below are ID of each terminal/Unit in the USB audio function.
//Device makes these IDs known to Host through USB descriptors
// if that terminal/unit is present in this USB audio device application.
#define APP_ID_INPUT_TERMINAL 0x01
#define APP_ID_OUTPUT_TERMINAL 0x02
#define APP_ID_MIXER_UNIT 0x03
#define APP_ID_SELECTOR_UNIT 0x04
#define APP_ID_FEATURE_UNIT 0x05
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#define APP_ID_PROCESSING_UNIT 0x06
#define APP_ID_EXTENSION_UNIT 0x07
int APP_AudioEntitySettingsCallback
(
USB_DEVICE_AUDIO_INDEX iAudio ,
uintptr_t controlHandle,
SETUP_PKT *setupPkt
)
{
int8_t err=-1;
USB_AUDIO_CONTROL_INTERFACE_REQUEST* controlRequest;
controlRequest = (USB_AUDIO_CONTROL_INTERFACE_REQUEST*) setupPkt;
switch(controlRequest->entityID)
{
case APP_ID_INPUT_TERMINAL:
case APP_ID_OUTPUT_TERMINAL:
err = APP_TerminalRequestHandler (controlRequest);
break;
case APP_ID_FEATURE_UNIT:
err = APP_FeatureUnitRequestHandler (iAudio, controlHandle, controlRequest);
break;
case APP_ID_MIXER_UNIT:
case APP_ID_SELECTOR_UNIT:
case APP_ID_PROCESSING_UNIT:
case APP_ID_EXTENSION_UNIT:
default:
//This USB Audio Speaker application does not support any other control request
// received for other unit from Host. So Stall if any other request recieved from
Host.
USB_DEVICE_ControlStatus(appData.usbDevHandle,
controlHandle,USB_DEVICE_CONTROL_STATUS_STALL);
break;
}//end of switch(controlRequest->entityID)
return err;
}//end of function APP_AudioEntitySettingsCallback
int APP_FeatureUnitRequestHandler
(
USB_DEVICE_AUDIO_INDEX iAudio ,
uintptr_t controlHandle,
USB_AUDIO_CONTROL_INTERFACE_REQUEST* controlRequest
)
{
USB_AUDIO_FEATURE_CONTROL_REQUEST* featureRequest;
featureRequest = (USB_AUDIO_FEATURE_CONTROL_REQUEST*) controlRequest;
int8_t err = 0;
switch(featureRequest->controlSelector)
{
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_MUTE_CONTROL:
{
if (featureRequest->bRequest == USB_AUDIO_CLASS_SPECIFIC_REQUEST_CODE_SET_CUR )
{
//A control write transfer recived from Host. Now recieve data from Host.
USB_DEVICE_ControlReceive(appData.usbDevHandle, controlHandle,(uint8_t *)
&DACMute, 1 );
}
else if(featureRequest->bRequest == USB_AUDIO_CLASS_SPECIFIC_REQUEST_CODE_GET_CUR)
{
/*Handle Get request*/
USB_DEVICE_ControlSend(appData.usbDevHandle, controlHandle, (uint8_t
*)&DACMute, 1 );
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}
else
{
USB_DEVICE_ControlStatus( appData.usbDevHandle, controlHandle,
USB_DEVICE_CONTROL_STATUS_STALL);
}
}
break;
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_VOLUME_CONTROL:
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_BASS_CONTROL:
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_MID_CONTROL:
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_TREBLE_CONTROL:
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_GRAPHIC_EQUALIZER_CONTROL:
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_AUTOMATIC_GAIN_CONTROL:
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_DELAY_CONTROL:
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_BASS_BOOST_CONTROL:
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_LOUDNESS_CONTROL:
case USB_AUDIO_FEATURE_UNIT_CONTROL_SELECTOR_FU_CONTROL_UNDEFINED:
default:
//This USB Audio Speaker application does not support any other feature unit
request
// from Host. So Stall if any other feature unit request recieved from Host.
USB_DEVICE_ControlStatus (appData.usbDevHandle,controlHandle,
USB_DEVICE_CONTROL_STATUS_STALL);
break;
} // end of switch(featureRequest->controlSelector)
return err;
} //end of function APP_FeatureUnitRequestHandler
Handling Audio function driver events :
The audio function driver events are discussed at USB_DEVICE_AUDIO_EVENT Enumeration.
5.9.2.5.4 Transferring Data
Describes how to send/receive data to/from USB Host using this USB Audio function driver.
Description
The USB Audio function driver offers API to send, receive data.
Receiving Data :
USB_DEVICE_AUDIO_Read Function can be used to schedule a data read from the USB Host. Whenever there is data
available from Host, the USB audio function driver calls back USB audio event handler with an event
USB_DEVICE_AUDIO_EVENT_READ_COMPLETE. User can take necessary actions once the data is received like playback
the audio samples through a CODEC and/or schedule next read request for audio samples.
Sending Data :
USB_DEVICE_AUDIO_Write Function can be used to schedule a data send to the Host. The data will be send to Host,
whenever it is ready to receive. Once the data send is complete the audio function driver callsback USB audio event handler with
a event USB_DEVICE_AUDIO_EVENT_WRITE_COMPLETE. User can take necessary action once the data write is complete
like schedule next data write, etc.
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5.9.2.6 Configuring the Library
Describes how to configure the Audio Function Driver.
Description
The application designer must specify the following configuration parameters while using the Audio Function Driver. The
configuration macros that implement these parameters must be located in the system_config.h file in the application project and
a compiler include path (to point to the folder that contains this file) should be specified.
Configuration Macro Name Description Comments
USB_DEVICE_AUDIO_INSTANCES_NUMBER Number of Audio
Function Driver
Instances in the
application
This macro defines the number of instances of the
Audio Function Driver. For example, if the application
needs to implement two instances of the Audio
Function Driver on one USB Device, the macro should
USB_DEVICE_AUDIO_INSTANCES_NUMBER be
set to 2. Note that implementing a USB Device that
features multiple Audio interfaces requires appropriate
USB configuration descriptors.
USB_DEVICE_AUDIO_QUEUE_SIZE Audio Function
Driver Buffer Queue
size
This macro defines the Audio function driver internal
buffer queue. The choice of this parameter defines the
readiness of the function driver to respond
successfully to read and write requests. The queue is
shared by
USB_DEVICE_AUDIO_INSTANCES_NUMBER
number of Audio instances. A buffer in the queue is
allocated to a read, write or a serial state notification
request. In a simple application, that does not require
buffer queuing and serial state notification, the
USB_DEVICE_AUDIO_QUEUE_SIZE macro can be
set to 2. In a case where higher throughput is
required, this parameter should be set to a higher
value. Note that increasing the queue size requires
more RAM.
5.9.2.7 Library Interface
Data Types and Constants
Name Description
USB_DEVICE_AUDIO_EVENT_RESPONSE_NONE USB Device Audio Function Driver
Event Handler Response Type None.
USB_DEVICE_AUDIO_TRANSFER_HANDLE_INVALID USB Device Audio Function Driver
Invalid Transfer Handle Definition.
USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE USB Device Audio Function Driver
Control Transfer Handle
USB_DEVICE_AUDIO_EP_INSTANCE This is type
USB_DEVICE_AUDIO_EP_INSTAN
CE.
USB_DEVICE_AUDIO_EVENT USB Device Audio Function Driver
Control Transfer Status
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USB_DEVICE_AUDIO_EVENT_DATA_READ_COMPLETE USB Device Audio Function Driver
Read and Write Complete Event
Data.
USB_DEVICE_AUDIO_EVENT_DATA_WRITE_COMPLETE USB Device Audio Function Driver
Read and Write Complete Event
Data.
USB_DEVICE_AUDIO_EVENT_HANDLER USB Device Audio Event Handler
Function Pointer Type.
USB_DEVICE_AUDIO_EVENT_RESPONSE USB Device Audio Function Driver
Event Callback Response Type
USB_DEVICE_AUDIO_INDEX USB Device Audio Function Driver
Index
USB_DEVICE_AUDIO_INSTANCE This is type
USB_DEVICE_AUDIO_INSTANCE.
USB_DEVICE_AUDIO_INSTANCE_STATE This is type
USB_DEVICE_AUDIO_INSTANCE_
STATE.
USB_DEVICE_AUDIO_INTERFACE_COLLECTION This is type
USB_DEVICE_AUDIO_INTERFACE
_COLLECTION.
USB_DEVICE_AUDIO_INTERFACE_INFO This is type
USB_DEVICE_AUDIO_INTERFACE
_INFO.
USB_DEVICE_AUDIO_INTERFACE_TYPE This is type
USB_DEVICE_AUDIO_INTERFACE
_TYPE.
USB_DEVICE_AUDIO_IRP_OBJECT USB Device Audio Function Driver
IRP object.
USB_DEVICE_AUDIO_RESULT USB Device Audio Function Driver
USB Device Audio Result
enumeration.
USB_DEVICE_AUDIO_STREAMING_INTERFACE This is type
USB_DEVICE_AUDIO_STREAMING
_INTERFACE.
USB_DEVICE_AUDIO_STREAMING_INTERFACE_ALTERNATE_SETTING This is type
USB_DEVICE_AUDIO_STREAMING
_INTERFACE_ALTERNATE_SETTI
NG.
USB_DEVICE_AUDIO_TRANSFER_HANDLE USB Device Audio Function Driver
Transfer Handle Definition.
Functions
Name Description
USB_DEVICE_AUDIO_ControlReceive This function allows the application to respond to the Audio function
driver specific control transfer requests. It allows the application to
receive data from the host in the data stage of the control transfer.
USB_DEVICE_AUDIO_ControlSend This function allows the application to respond to the Audio function
driver specific control transfer requests. It allows the application to send
data to the host in the data stage of the control transfer.
USB_DEVICE_AUDIO_ControlStatus This function allows the application to complete the status stage of the
the Audio Function Driver specific control transfer request.
USB_DEVICE_AUDIO_EventHandlerSet This function registers an event handler for the specified Audio function
driver instance.
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USB_DEVICE_AUDIO_Read This function requests a data read from the USB Device Audio Function
Driver Layer.
USB_DEVICE_AUDIO_Write This function requests a data write to the USB Device Audio Function
Driver Layer.
Description
This section describes the Application Programming Interface (API) functions of the USB Device Audio Library
Refer to each section for a detailed description.
5.9.2.7.1 Functions
5.9.2.7.1.1 USB_DEVICE_AUDIO_ControlReceive Function
C
USB_DEVICE_AUDIO_RESULT USB_DEVICE_AUDIO_ControlReceive(
USB_DEVICE_AUDIO_INDEX instanceIndex,
USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * data,
size_t size
);
Description
This function allows the application to respond to the Audio function driver specific control transfer requests. It allows the
application to receive data from the host in the data stage of the control transfer.
For example,when the Host wants to set current Volume settings to Device, the Host first sends a SETUP packet to the Device
indicating that it intedns to set Volume. After receving the SETUP packet the Device should be prepared to recieve cuurent
Volume from Host. Application should make use of USB_DEVICE_AUDIO_ControlReceive() function to receive data from the
Host in such cases. The function can be called in the Audio Function Driver event handler or can be called outside the event
handler. Calling this function outside the event handler defers the response to the event. This allows the application to prepare
the data buffer out of the event handler context, especially if the data buffer to receive the data is not readily available. Note
however, that there are timing considerations when responding to the control transfer. Exceeding the response time will cause
the host to cancel the control transfer and may cause USB host to reject the device. The application must use the control transfer
handle that was generated along with the event as the controlTransferHandle.
Preconditions
This function should only be called in response to a Audio function driver event that requires a control transfer response.
Parameters
Parameters Description
instance USB Device Audio Function Driver instance.
controlTransferHandle Control Transfer handle for the control transfer.
data Data buffer to receive the data stage of the control transfer.
size size (in bytes) of the data to sent.
Returns
USB_DEVICE_AUDIO_RESULT_ERROR_CONTROL_TRANSFER_FAILED - The request was not successful because the
USB host cancelled the control transfer.
USB_DEVICE_AUDIO_RESULT_OK - The request was successful.
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Example
// ------------------------------------------------------------------
// In this example, the application receives current Mute info
// with in the event handler. The application uses the
// USB_DEVICE_AUDIO_ControlReceive() function to do this.
// ------------------------------------------------------------------
uint8_t DACMute = 1; // Holds the status of Mute Control
USB_DEVICE_AUDIO_EVENT_RESPONSE USBDeviceAudioEventHandler
(
USB_DEVICE_AUDIO_INDEX instanceIndex,
USB_DEVICE_AUDIO_EVENT event,
USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE controlTransferHandle,
USB_DEVICE_AUDIO_EVENT_DATA * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_AUDIO_EVENT_ENTITY_SETTINGS_RECEIVED:
//In this example we have received a Set Mute request from the Host.
// Typcast the recived data into interface request.
controlRequest = (USB_AUDIO_CONTROL_INTERFACE_REQUEST*) pData;
//check entity ID (Note: Entity IDs are specified in the USB device descriptor.
switch(controlRequest->entityID)
{
case APP_ID_FEATURE_UNIT :
featureRequest = (USB_AUDIO_FEATURE_CONTROL_REQUEST*)pData;
switch(featureRequest->controlSelector)
{
case USB_AUDIO_FCS_MUTE_CONTROL:
{
if(featureRequest->bRequest == USB_AUDIO_CSRC_SET_CUR)
{
//A control write transfer recived from Host. Now recieve data
from Host.
USB_DEVICE_AUDIO_ControlReceive(iAudio, controlHandle,(uint8_t *)
&DACMute, 1 );
}
}
break;
}
break;
}
break;
case USB_DEVICE_AUDIO_EVENT_CONTROL_TRANSFER_RECEIVED:
USB_DEVICE_ControlStatus(appData.usbDevHandle,controlTransferHandle,
USB_DEVICE_CONTROL_STATUS_OK );
if (appData.currentInterfaceAlternateSetting == 1)
AK4953ADACMute(pCodecHandle, DACMute);
break;
}Remarks: None.
5.9.2.7.1.2 USB_DEVICE_AUDIO_ControlSend Function
C
USB_DEVICE_AUDIO_RESULT USB_DEVICE_AUDIO_ControlSend(
USB_DEVICE_AUDIO_INDEX instanceIndex,
USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * data,
size_t size
);
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Description
This function allows the application to respond to the Audio function driver specific control transfer requests. It allows the
application to send data to the host in the data stage of the control transfer. For example, if the Host requests current Volume
settings to Device, then the Device needs to send a control transfer data to the Host. The function can be called in the Audio
Function Driver event handler or can be called outside the event handler. Calling this function outside the event handler defers
the response to the event. This allows the application to prepare the response data out of the event handler context, especially if
the data is not readily available. Note however, that there are timing considerations when responding to the control transfer.
Exceeding the response time will cause the host to cancel the control transfer and may cause USB host to reject the device. The
application must use the control transfer handle that was generated along with the event as the controlTransferHandle.
Preconditions
This function should only be called in response to a Audio function driver event that requires a control transfer response.
Parameters
Parameters Description
instance USB Device Audio Function Driver instance.
controlTransferHandle Control Transfer handle for the control transfer.
data Data that represents the data stage of the control transfer.
size size (in bytes) of the data to sent.
Returns
USB_DEVICE_AUDIO_RESULT_ERROR_CONTROL_TRANSFER_FAILED - The request was not successful because the
USB host cancelled the control transfer.
USB_DEVICE_AUDIO_RESULT_OK - The request was successful.
Example
// ------------------------------------------------------------------
// In this example, the application responds to am Audio Control request
// with in the event handler. The application uses the
// USB_DEVICE_AUDIO_ControlSend() function to do this.
// ------------------------------------------------------------------
uint8_t DACMute = 1; // Holds the status of Mute Control
USB_DEVICE_AUDIO_EVENT_RESPONSE USBDeviceAudioEventHandler
(
USB_DEVICE_AUDIO_INDEX instanceIndex,
USB_DEVICE_AUDIO_EVENT event,
USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE controlTransferHandle,
USB_DEVICE_AUDIO_EVENT_DATA * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_AUDIO_EVENT_ENTITY_SETTINGS_RECEIVED:
//In this example we have received a Get Mute request from the Host.
// Typcast the recived data into interface request.
controlRequest = (USB_AUDIO_CONTROL_INTERFACE_REQUEST*) pData;
//check entity ID (Note: Entity IDs are specified in the USB device descriptor.
switch(controlRequest->entityID)
{
case APP_ID_FEATURE_UNIT :
featureRequest = (USB_AUDIO_FEATURE_CONTROL_REQUEST*)pData;
switch(featureRequest->controlSelector)
{
case USB_AUDIO_FCS_MUTE_CONTROL:
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{
if(featureRequest->bRequest == USB_AUDIO_CSRC_GET_CUR)
{
// In this case, the application should send the current mute
// status to the host. The application must send the
// USB_DEVICE_AUDIO_ControlSend() function to send the data.
USB_DEVICE_AUDIO_ControlSend(iAudio, controlHandle, (uint8_t
*)&DACMute, 1 );
}
}
break;
}
break;
}
break;
}
Remarks: None.
5.9.2.7.1.3 USB_DEVICE_AUDIO_ControlStatus Function
C
USB_DEVICE_AUDIO_RESULT USB_DEVICE_AUDIO_ControlStatus(
USB_DEVICE_AUDIO_INDEX instanceIndex,
USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE controlTransferHandle,
USB_DEVICE_AUDIO_CONTROL_STATUS status
);
Description
This function allows the application to complete the status stage of the the Audio Function Driver specific control transfer
request. The application can either accept the data stage or stall it. Calling this function with status set to
USB_DEVICE_AUDIO_CONTROL_STATUS_OK will acknowledge the status stage of the control transfer. The control transfer
can be stalled by setting the status parameter to USB_DEVICE_AUDIO_CONTROL_STATUS_STALL. The function can be
called in the Audio Function Driver event handler or can be called outside the event handler. Calling this function outside the
event handler defers the response to the event. This allows the application to analyze the event response outside the event
handler. Note however, that there are timing considerations when responding to the control transfer. Exceeding the response
time will cause the host to cancel the control transfer and may cause USB host to reject the device. The application must use the
control transfer handle that was generated along with the event as the controlTransferHandle. The application must be aware of
events and associated control transfers that do or do not require data stages. Incorrect usage of the
USB_DEVICE_AUDIO_ControlStatus() function could cause the device function to be non-compliant.
Preconditions
This function should only be called in response to a Audio function driver event that requires a control transfer response.
Parameters
Parameters Description
instance USB Device Audio Function Driver instance.
controlTransferHandle Control Transfer handle for the control transfer.
status Set to USB_DEVICE_AUDIO_CONTROL_STATUS_OK to acknowledge the
control transfer. Set to USB_DEVICE_AUDIO_CONTROL_STATUS_STALL to
stall the transfer.
Returns
USB_DEVICE_AUDIO_RESULT_ERROR_CONTROL_TRANSFER_FAILED - The request was not successful because the
USB host cancelled the control transfer.
USB_DEVICE_AUDIO_RESULT_OK - The request was successful.
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Example
Remarks: None.
5.9.2.7.1.4 USB_DEVICE_AUDIO_EventHandlerSet Function
C
USB_DEVICE_AUDIO_RESULT USB_DEVICE_AUDIO_EventHandlerSet(
USB_DEVICE_AUDIO_INDEX iAudio,
USB_DEVICE_AUDIO_EVENT_HANDLER eventHandler,
uintptr_t context
);
Description
This function registers a event handler for the specified Audio function driver instance. This function should be called by the
client when it receives a SET CONFIGURATION event from the device layer. A event handler must be registered for function
driver to respond to function driver specific commands. If the event handler is not registered, the device layer will stall function
driver specific commands and the USB device may not function.
Preconditions
This function should be called when the function driver has been initialized as a result of a set configuration.
Parameters
Parameters Description
instance Instance of the Audio Function Driver.
eventHandler A pointer to event handler function.
context Application specific context that is returned in the event handler.
Returns
USB_DEVICE_AUDIO_RESULT_OK - The operation was successful
USB_DEVICE_AUDIO_RESULT_ERROR_INSTANCE_INVALID - The specified instance does not exist.
USB_DEVICE_AUDIO_RESULT_ERROR_INVALID_HANDLER - The eventHandler parameter is NULL
Remarks
None.
Example
// This code snippet shows an example registering an event handler. Here
// the application specifies the context parameter as a pointer to an
// application object (appObject) that should be associated with this
// instance of the Audio function driver.
USB_DEVICE_AUDIO_RESULT result;
USB_DEVICE_AUDIO_EVENT_RESPONSE APP_USBDeviceAUDIOEventHandler
(
USB_DEVICE_AUDIO_INDEX instanceIndex ,
USB_DEVICE_AUDIO_EVENT event ,
USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE controlTransferHandle
void* pData, uintptr_t context
)
{
// Event Handling comes here
switch(event)
{
...
}
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return(USB_DEVICE_AUDIO_EVENT_RESPONSE_NONE);
}
result = USB_DEVICE_AUDIO_EventHandlerSet ( 0 ,&APP_EventHandler, (uintptr_t) &appObject);
if(USB_DEVICE_AUDIO_RESULT_OK != result)
{
SYS_ASSERT ( false , "invalid event handler function" );
}
5.9.2.7.1.5 USB_DEVICE_AUDIO_Read Function
C
USB_DEVICE_AUDIO_RESULT USB_DEVICE_AUDIO_Read(
USB_DEVICE_AUDIO_INDEX iAudio,
USB_DEVICE_AUDIO_TRANSFER_HANDLE* transferHandle,
uint8_t interfaceNum,
void * data,
size_t size
);
Description
This function requests a data read from the USB Device Audio Function Driver Layer. The function places a requests with driver,
the request will get serviced as data is made available by the USB Host. A handle to the request is returned in the
transferHandle parameter. The termination of the request is indicated by the
USB_DEVICE_AUDIO_EVENT_READ_COMPLETE event. The amount of data read and the transfer handle associated with the
request is returned along with the event. The transfer handle expires when event handler for the
USB_DEVICE_AUDIO_EVENT_READ_COMPLETE exits. If the read request could not be accepted, the function returns an
error code and transferHandle will contain the value USB_DEVICE_AUDIO_TRANSFER_HANDLE_INVALID.
Preconditions
The function driver should have been configured.
Parameters
Parameters Description
instance USB Device Audio Function Driver instance.
transferHandle Pointer to a USB_DEVICE_AUDIO_TRANSFER_HANDLE type of variable. This
variable will contain the transfer handle in case the read request was successful.
interfaceNum The USB Audio streaming interface number on which read request is to placed.
data pointer to the data buffer where read data will be stored.
size Size of the data buffer. Refer to the description section for more details on how the
size affects the transfer.
Returns
USB_DEVICE_AUDIO_RESULT_OK - The read request was successful. transferHandle contains a valid transfer handle.
USB_DEVICE_AUDIO_RESULT_ERROR_TRANSFER_QUEUE_FULL - internal request queue is full. The write request could
not be added.
USB_DEVICE_AUDIO_RESULT_ERROR_TRANSFER_SIZE_INVALID - The specified transfer size was not a mulitple of
endpoint size or is 0.
USB_DEVICE_AUDIO_RESULT_ERROR_INSTANCE_NOT_CONFIGURED - The specified instance is not configured yet.
USB_DEVICE_AUDIO_RESULT_ERROR_INSTANCE_INVALID - The specified instance was not provisioned in the application
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and is invalid.
Remarks
None
Example
// Shows an example of how to read. This assumes that
// driver was opened successfully.
USB_DEVICE_AUDIO_INDEX iAudio;
USB_DEVICE_AUDIO_TRANSFER_HANDLE transferHandle;
unit8_t interfaceNumber;
unit8_t rxBuffer[192];
USB_DEVICE_AUDIO_RESULT readRequestResult;
iAudio = 0; //specify the Audio Function driver instance number.
interfaceNumber = 1; //Specify the Audio Streaming interface number.
readRequestResult = USB_DEVICE_AUDIO_Read
(
iAudio,
&transferHandle,
interfaceNumber,
&rxBuffer,
192
);
if(USB_DEVICE_AUDIO_RESULT_OK != readRequestResult)
{
//Do Error handling here
}
// The completion of the read request will be indicated by the
// USB_DEVICE_AUDIO_EVENT_READ_COMPLETE event.
5.9.2.7.1.6 USB_DEVICE_AUDIO_Write Function
C
USB_DEVICE_AUDIO_RESULT USB_DEVICE_AUDIO_Write(
USB_DEVICE_AUDIO_INDEX iAudio,
USB_DEVICE_AUDIO_TRANSFER_HANDLE* transferHandle,
uint8_t interfaceNum,
void * data,
size_t size
);
Description
This function requests a data write to the USB Device Audio Function Driver Layer. The function places a requests with driver,
the request will get serviced as data is requested by the USB Host. A handle to the request is returned in the transferHandle
parameter. The termination of the request is indicated by the USB_DEVICE_AUDIO_EVENT_WRITE_COMPLETE event. The
amount of data written and the transfer handle associated with the request is returned along with the event in writeCompleteData
member of the pData parameter in the event handler.
The transfer handle expires when event handler for the USB_DEVICE_AUDIO_EVENT_WRITE_COMPLETE exits. If the read
request could not be accepted, the function returns an error code and transferHandle will contain the value
USB_DEVICE_AUDIO_TRANSFER_HANDLE_INVALID.
Preconditions
The function driver should have been configured.
Parameters
Parameters Description
instance USB Device Audio Function Driver instance.
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transferHandle Pointer to a USB_DEVICE_AUDIO_TRANSFER_HANDLE type of variable. This
variable will contain the transfer handle in case the write request was successful.
interfaceNum The USB Audio streaming interface number on which the write request is to
placed.
data pointer to the data buffer contains the data to be written.
size Size of the data buffer. Refer to the description section for more details on how the
size affects the transfer.
Returns
USB_DEVICE_AUDIO_RESULT_OK - The read request was successful. transferHandle contains a valid transfer handle.
USB_DEVICE_AUDIO_RESULT_ERROR_TRANSFER_QUEUE_FULL - internal request queue is full. The write request could
not be added.
USB_DEVICE_AUDIO_RESULT_ERROR_TRANSFER_SIZE_INVALID - The specified transfer size was not a mulitple of
endpoint size or is 0.
USB_DEVICE_AUDIO_RESULT_ERROR_INSTANCE_NOT_CONFIGURED - The specified instance is not configured yet.
USB_DEVICE_AUDIO_RESULT_ERROR_INSTANCE_INVALID - The specified instance was not provisioned in the application
and is invalid.
Remarks
None
Example
// Shows an example of how to write. This assumes that
// driver was opened successfully.
USB_DEVICE_AUDIO_INDEX iAudio;
USB_DEVICE_AUDIO_TRANSFER_HANDLE transferHandle;
unit8_t interfaceNumber;
unit8_t txBuffer[192];
USB_DEVICE_AUDIO_RESULT writeRequestResult;
iAudio = 0; //specify the Audio Function driver instance number.
interfaceNumber = 1; //Specify the Audio Streaming interface number.
writeRequestResult = USB_DEVICE_AUDIO_Write
(
iAudio,
&transferHandle,
interfaceNumber,
&txBuffer
192
);
if(USB_DEVICE_AUDIO_RESULT_OK != writeRequestResult)
{
//Do Error handling here
}
// The completion of the write request will be indicated by the
// USB_DEVICE_AUDIO_EVENT_Write_COMPLETE event.
5.9.2.7.2 Data Types and Constants
5.9.2.7.2.1 USB_DEVICE_AUDIO_EVENT_RESPONSE_NONE Macro
C
#define USB_DEVICE_AUDIO_EVENT_RESPONSE_NONE
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Description
USB Device Audio Function Driver Event Handler Response None
This is the definition of the Audio Function Driver Event Handler Response Type none.
Remarks
Intentionally defined to be empty.
5.9.2.7.2.2 USB_DEVICE_AUDIO_TRANSFER_HANDLE_INVALID Macro
C
#define USB_DEVICE_AUDIO_TRANSFER_HANDLE_INVALID ((USB_DEVICE_AUDIO_TRANSFER_HANDLE)(-1))
Description
USB Device Audio Function Driver Invalid Transfer Handle Definition
This definition defines a USB Device Audio Function Driver Invalid Transfer Handle. A Invalid Transfer Handle is returned by the
USB_DEVICE_Audio_Write() and USB_DEVICE_Audio_Read() functions when the request was not successful.
Remarks
None.
5.9.2.7.2.3 USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE Type
C
typedef USB_DEVICE_CONTROL_TRANSFER_HANDLE USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE;
Description
USB Device Audio Function Driver Control Transfer Handle
This is returned by the Audio function driver event handler and should be used by the application while responding to Audio
function driver control transfer requests.
Remarks
None.
5.9.2.7.2.4 USB_DEVICE_AUDIO_EP_INSTANCE Structure
C
typedef struct {
uint8_t epAddr;
uint16_t epMaxPacketSize;
USB_DEVICE_AUDIO_IRP_OBJECT irpObject[USB_DEVICE_AUDIO_QUEUE_SIZE];
} USB_DEVICE_AUDIO_EP_INSTANCE;
Description
This is type USB_DEVICE_AUDIO_EP_INSTANCE.
Members
Members Description
uint8_t epAddr; End point address
uint16_t epMaxPacketSize; End point maximum payload
USB_DEVICE_AUDIO_IRP_OBJECT
irpObject[USB_DEVICE_AUDIO_QUEUE_SIZE];
IRP object Q per end point
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5.9.2.7.2.5 USB_DEVICE_AUDIO_EVENT Enumeration
C
typedef enum {
USB_DEVICE_AUDIO_EVENT_WRITE_COMPLETE,
USB_DEVICE_AUDIO_EVENT_READ_COMPLETE,
USB_DEVICE_AUDIO_EVENT_INTERAFCE_ALTERNATE_SETTING,
USB_DEVICE_AUDIO_EVENT_CONTROL_TRANSFER_RECEIVED,
USB_DEVICE_AUDIO_EVENT_CONTROL_TRANSFER_SENT,
USB_DEVICE_AUDIO_EVENT_ENTITY_SETTINGS_RECEIVED
} USB_DEVICE_AUDIO_EVENT;
Description
USB Device Audio Function Driver Control Transfer Status
This flag is used along with the USB_DEVICE_AUDIO_ControlStatus() function to indicate success or failure of an Audio class
specific control transfer request.
Members
Members Description
USB_DEVICE_AUDIO_EVENT_WRITE_COMPLETE This event occurs when a write operation scheduled by
calling the USB_DEVICE_AUDIO_Write() function has
completed. The pData member in the event handler will
point to
USB_DEVICE_AUDIO_EVENT_WRITE_COMPLETE_
DATA
type.
USB_DEVICE_AUDIO_EVENT_READ_COMPLETE This event occurs when a read operation scheduled by
calling the USB_DEVICE_AUDIO_Read() function has
completed. The pData member in the event handler will
point to
USB_DEVICE_AUDIO_EVENT_READ_COMPLETE_D
ATA
type.
USB_DEVICE_AUDIO_EVENT_INTERAFCE_ALTERNATE_SETTING USB spec allows Devices to have multiple alternate
settings for the same interface. This event occurs when
Host trying set an alternate setting for an interface
present in this audio function. The callback function
USB_DEVICE_AUDIO_EVENT_CALLBACK also
sends Interface Number and Alternate setting number
when this event occurs. An application need to take
necessary action based on the interface alternate
setting.
USB_DEVICE_AUDIO_EVENT_CONTROL_TRANSFER_RECEIVED This event occurs when the data stage of a control
write transfer has completed. This would occur after the
application would respond with a
USB_DEVICE_ControlReceive() function to a control
write request from Host. This event notifies the
application that the data is recived from Host and is
available at the location passed by the
USB_DEVICE_ControlReceive() function. The
application should respond to Host with Zero Length
Packet by calling USB_DEVICE_ControlStatus()
function.
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USB_DEVICE_AUDIO_EVENT_CONTROL_TRANSFER_SENT This event occurs when the data stage of a control read
transfer has completed. This event would occur after
the application uses the USB_DEVICE_ControlSend()
function to respond to an entity request recived from
Host.
Remarks
None.
5.9.2.7.2.6 USB_DEVICE_AUDIO_EVENT_DATA_READ_COMPLETE Structure
C
typedef struct {
USB_DEVICE_AUDIO_TRANSFER_HANDLE handle;
uint16_t length;
} USB_DEVICE_AUDIO_EVENT_DATA_WRITE_COMPLETE, USB_DEVICE_AUDIO_EVENT_DATA_READ_COMPLETE;
Description
USB Device Audio Function Driver Read and Write Complete Event Data.
This data type defines the data structure returned by the driver along with USB_DEVICE_AUDIO_EVENT_READ_COMPLETE
and USB_DEVICE_AUDIO_EVENT_WRITE_COMPLETE events.
Members
Members Description
5.9.2.7.2.7 USB_DEVICE_AUDIO_EVENT_DATA_WRITE_COMPLETE Structure
C
typedef struct {
USB_DEVICE_AUDIO_TRANSFER_HANDLE handle;
uint16_t length;
} USB_DEVICE_AUDIO_EVENT_DATA_WRITE_COMPLETE, USB_DEVICE_AUDIO_EVENT_DATA_READ_COMPLETE;
Description
USB Device Audio Function Driver Read and Write Complete Event Data.
This data type defines the data structure returned by the driver along with USB_DEVICE_AUDIO_EVENT_READ_COMPLETE
and USB_DEVICE_AUDIO_EVENT_WRITE_COMPLETE events.
Members
Members Description
5.9.2.7.2.8 USB_DEVICE_AUDIO_EVENT_HANDLER Type
C
typedef USB_DEVICE_AUDIO_EVENT_RESPONSE (*
USB_DEVICE_AUDIO_EVENT_HANDLER)(USB_DEVICE_AUDIO_INDEX iAudio , USB_DEVICE_AUDIO_EVENT event ,
USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE controlTransferHandle, void * pData, uintptr_t
context);
Description
USB Device Audio Event Handler Function Pointer Type.
This data type defines the required function signature USB Device Audio Function Driver event handling callback function. The
application must register a pointer to an Audio Function Driver events handling function who's function signature (parameter and
return value types) match the types specified by this function pointer in order to receive event call backs from the Audio Function
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Driver. The function driver will invoke this function with event relevant parameters. The description of the event handler function
parameters is given here.
instanceIndex - Instance index of the Audio Function Driver that generated the event.
event - Type of event generated.
controlTransferHandle - Control Transfer Handle for Audio function driver events that require application response. The
application should use this handle when the USB Audio Device Control Transfer functions to respond to the events.
pData - This parameter should be type casted to a event specific pointer type based on the event that has occurred. Refer to the
USB_DEVICE_AUDIO_EVENT enumeration description for more details.
context - Value identifying the context of the application that registered the event handling function.
Remarks
None.
5.9.2.7.2.9 USB_DEVICE_AUDIO_EVENT_RESPONSE Type
C
typedef void USB_DEVICE_AUDIO_EVENT_RESPONSE;
Description
USB Device Audio Function Driver Event Handler Response Type
This is the return type of the Audio Function Driver event handler.
Remarks
None.
5.9.2.7.2.10 USB_DEVICE_AUDIO_INDEX Type
C
typedef uintptr_t USB_DEVICE_AUDIO_INDEX;
Description
USB Device Audio Function Driver Index
This uniquely identifies a Audio Function Driver instance.
Remarks
None.
5.9.2.7.2.11 USB_DEVICE_AUDIO_INSTANCE Structure
C
typedef struct {
USB_DEVICE_HANDLE devLayerHandle;
USB_DEVICE_AUDIO_INDEX audioIndex;
USB_DEVICE_AUDIO_INTERFACE_COLLECTION infCollection;
USB_DEVICE_AUDIO_INSTANCE_STATE state;
USB_DEVICE_AUDIO_EVENT_HANDLER appEventCallBack;
uintptr_t userData;
} USB_DEVICE_AUDIO_INSTANCE;
Description
This is type USB_DEVICE_AUDIO_INSTANCE.
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Members
Members Description
USB_DEVICE_HANDLE devLayerHandle; device layer instance associated with this function driver instance
USB_DEVICE_AUDIO_INDEX audioIndex; instance index
USB_DEVICE_AUDIO_INSTANCE_STATE
state;
Current state of the function driver instance
USB_DEVICE_AUDIO_EVENT_HANDLER
appEventCallBack;
Application callback
uintptr_t userData; Application user data
5.9.2.7.2.12 USB_DEVICE_AUDIO_INSTANCE_STATE Enumeration
C
typedef enum {
USB_DEVICE_AUDIO_INSTANCE_NOT_INITIALIZED = 0,
USB_DEVICE_AUDIO_INSTANCE_INITIALIZED,
USB_DEVICE_AUDIO_INSTANCE_OPENED,
USB_DEVICE_AUDIO_INSTANCE_CLOSED
} USB_DEVICE_AUDIO_INSTANCE_STATE;
Description
This is type USB_DEVICE_AUDIO_INSTANCE_STATE.
5.9.2.7.2.13 USB_DEVICE_AUDIO_INTERFACE_COLLECTION Structure
C
typedef struct {
uint8_t bControlInterfaceNum;
uint8_t numStreamingInf;
uint16_t bcdADC;
USB_DEVICE_AUDIO_EP_INSTANCE intEp[1];
bool isIntEpExists;
USB_DEVICE_AUDIO_STREAMING_INTERFACE streamInf[USB_DEVICE_AUDIO_MAX_STREAMING_INTERFACES];
} USB_DEVICE_AUDIO_INTERFACE_COLLECTION;
Description
This is type USB_DEVICE_AUDIO_INTERFACE_COLLECTION.
Members
Members Description
uint8_t bControlInterfaceNum; control interface number
uint8_t numStreamingInf; number of streaming interfaces
uint16_t bcdADC; Audio spec in BCD 0x100 or 0x200
USB_DEVICE_AUDIO_EP_INSTANCE
intEp[1];
optional interrupt ep info
bool isIntEpExists; presence or absence of the interrupt EP
5.9.2.7.2.14 USB_DEVICE_AUDIO_INTERFACE_INFO Structure
C
typedef struct {
uint8_t interfaceNumber;
uint8_t interfaceAlternateSettting;
} USB_DEVICE_AUDIO_INTERFACE_INFO;
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Description
This is type USB_DEVICE_AUDIO_INTERFACE_INFO.
5.9.2.7.2.15 USB_DEVICE_AUDIO_INTERFACE_TYPE Enumeration
C
typedef enum {
USB_DEVICE_AUDIO_INTERFACE_STREAM_UNDEFINED = 0,
USB_DEVICE_AUDIO_INTERFACE_STREAM_AUDIO,
USB_DEVICE_AUDIO_INTERFACE_STREAM_MIDI,
USB_DEVICE_AUDIO_INTERFACE_FEEDBACK
} USB_DEVICE_AUDIO_INTERFACE_TYPE;
Description
This is type USB_DEVICE_AUDIO_INTERFACE_TYPE.
5.9.2.7.2.16 USB_DEVICE_AUDIO_IRP_OBJECT Structure
C
typedef struct {
USB_DEVICE_IRP irp;
USB_DEVICE_AUDIO_INDEX iAudio;
} USB_DEVICE_AUDIO_IRP_OBJECT;
Description
USB Device Audio Function Driver IRP object.
IRP object used by the Audio to service application requests.
Remarks
None.
5.9.2.7.2.17 USB_DEVICE_AUDIO_RESULT Enumeration
C
typedef enum {
USB_DEVICE_AUDIO_RESULT_OK,
USB_DEVICE_AUDIO_RESULT_ERROR_TRANSFER_SIZE_INVALID,
USB_DEVICE_AUDIO_RESULT_ERROR_TRANSFER_QUEUE_FULL,
USB_DEVICE_AUDIO_RESULT_ERROR_INSTANCE_INVALID,
USB_DEVICE_AUDIO_RESULT_ERROR_INSTANCE_NOT_CONFIGURED,
USB_DEVICE_AUDIO_RESULT_ERROR_INVALID_HANDLER,
USB_DEVICE_AUDIO_RESULT_ERROR_CONTROL_TRANSFER_FAILED,
USB_DEVICE_AUDIO_RESULT_ERROR_INVALID_INTERFACE_ID,
USB_DEVICE_AUDIO_RESULT_ERROR_INVALID_BUFFER
} USB_DEVICE_AUDIO_RESULT;
Description
USB Device Audio Function Driver USB Device Audio Result enumeration.
This enumeration lists the possible USB Device Audio Function Driver operation results. These values are returned by the
USB_DEVICE_AUDIO_Write() and USB_DEVICE_AUDIO_Read() functions.
Members
Members Description
USB_DEVICE_AUDIO_RESULT_OK The operation was successful
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USB_DEVICE_AUDIO_RESULT_ERROR_TRANSFER_SIZE_INVALID The transfer size is invalid. Refer to the
description of the read or write function for more
details
USB_DEVICE_AUDIO_RESULT_ERROR_TRANSFER_QUEUE_FULL The transfer queue is full and no new transfers
can be scheduled
USB_DEVICE_AUDIO_RESULT_ERROR_INSTANCE_INVALID The specified instance is not provisioned in the
system
USB_DEVICE_AUDIO_RESULT_ERROR_INSTANCE_NOT_CONFIGURED The specified instance is not configured yet
USB_DEVICE_AUDIO_RESULT_ERROR_INVALID_HANDLER The event handler provided is NULL
USB_DEVICE_AUDIO_RESULT_ERROR_CONTROL_TRANSFER_FAILED The control transfer was aborted
USB_DEVICE_AUDIO_RESULT_ERROR_INVALID_INTERFACE_ID Interface number passed to the read or write
function is invalid.
Remarks
None.
5.9.2.7.2.18 USB_DEVICE_AUDIO_STREAMING_INTERFACE Structure
C
typedef struct {
uint8_t interfaceNum;
USB_DEVICE_AUDIO_INTERFACE_TYPE infType;
uint8_t activeSetting;
USB_DEVICE_AUDIO_STREAMING_INTERFACE_ALTERNATE_SETTING
alterntSetting[USB_DEVICE_AUDIO_MAX_ALTERNATE_SETTING];
} USB_DEVICE_AUDIO_STREAMING_INTERFACE;
Description
This is type USB_DEVICE_AUDIO_STREAMING_INTERFACE.
Members
Members Description
uint8_t interfaceNum; interface number
uint8_t activeSetting; currently active alternate setting
5.9.2.7.2.19 USB_DEVICE_AUDIO_STREAMING_INTERFACE_ALTERNATE_SETTING
Structure
C
typedef struct {
uint8_t numEndPoints;
USB_DEVICE_AUDIO_EP_INSTANCE isoDataEp;
USB_DEVICE_AUDIO_EP_INSTANCE isoSyncEp;
} USB_DEVICE_AUDIO_STREAMING_INTERFACE_ALTERNATE_SETTING;
Description
This is type USB_DEVICE_AUDIO_STREAMING_INTERFACE_ALTERNATE_SETTING.
Members
Members Description
uint8_t numEndPoints; number of end-points in this interface
USB_DEVICE_AUDIO_EP_INSTANCE
isoDataEp;
end points associated with this interface
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5.9.2.7.2.20 USB_DEVICE_AUDIO_TRANSFER_HANDLE Type
C
typedef uintptr_t USB_DEVICE_AUDIO_TRANSFER_HANDLE;
Description
USB Device Audio Function Driver Transfer Handle Definition
This definition defines a USB Device Audio Function Driver Transfer Handle. A Transfer Handle is owned by the application but
its value is modified by the USB_DEVICE_AUDIO_Write() and USB_DEVICE_AUDIO_Read() functions. The transfer handle is
valid for the life time of the transfer and expires when the transfer related event had occurred.
Remarks
None.
5.9.2.8 Files
Files
Name Description
usb_device_audio.h USB Device AUDIO function Driver Interface
Description
5.9.2.8.1 usb_device_audio.h
USB DEVICE AUDIO Function Driver Interface
This file describes the USB Device AUDIO Function Driver interface.
Enumerations
Name Description
USB_DEVICE_AUDIO_EVENT USB Device Audio Function Driver Control Transfer Status
USB_DEVICE_AUDIO_INSTANCE_STATE This is type USB_DEVICE_AUDIO_INSTANCE_STATE.
USB_DEVICE_AUDIO_INTERFACE_TYPE This is type USB_DEVICE_AUDIO_INTERFACE_TYPE.
USB_DEVICE_AUDIO_RESULT USB Device Audio Function Driver USB Device Audio Result
enumeration.
Functions
Name Description
USB_DEVICE_AUDIO_ControlReceive This function allows the application to respond to the Audio function
driver specific control transfer requests. It allows the application to
receive data from the host in the data stage of the control transfer.
USB_DEVICE_AUDIO_ControlSend This function allows the application to respond to the Audio function
driver specific control transfer requests. It allows the application to send
data to the host in the data stage of the control transfer.
USB_DEVICE_AUDIO_ControlStatus This function allows the application to complete the status stage of the
the Audio Function Driver specific control transfer request.
USB_DEVICE_AUDIO_EventHandlerSet This function registers an event handler for the specified Audio function
driver instance.
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USB_DEVICE_AUDIO_Read This function requests a data read from the USB Device Audio Function
Driver Layer.
USB_DEVICE_AUDIO_Write This function requests a data write to the USB Device Audio Function
Driver Layer.
Macros
Name Description
USB_DEVICE_AUDIO_EVENT_RESPONSE_NONE USB Device Audio Function Driver Event Handler
Response Type None.
USB_DEVICE_AUDIO_TRANSFER_HANDLE_INVALID USB Device Audio Function Driver Invalid Transfer
Handle Definition.
Structures
Name Description
USB_DEVICE_AUDIO_EP_INSTANCE This is type
USB_DEVICE_AUDIO_EP_INSTAN
CE.
USB_DEVICE_AUDIO_EVENT_DATA_READ_COMPLETE USB Device Audio Function Driver
Read and Write Complete Event
Data.
USB_DEVICE_AUDIO_EVENT_DATA_WRITE_COMPLETE USB Device Audio Function Driver
Read and Write Complete Event
Data.
USB_DEVICE_AUDIO_INSTANCE This is type
USB_DEVICE_AUDIO_INSTANCE.
USB_DEVICE_AUDIO_INTERFACE_COLLECTION This is type
USB_DEVICE_AUDIO_INTERFACE
_COLLECTION.
USB_DEVICE_AUDIO_INTERFACE_INFO This is type
USB_DEVICE_AUDIO_INTERFACE
_INFO.
USB_DEVICE_AUDIO_IRP_OBJECT USB Device Audio Function Driver
IRP object.
USB_DEVICE_AUDIO_STREAMING_INTERFACE This is type
USB_DEVICE_AUDIO_STREAMING
_INTERFACE.
USB_DEVICE_AUDIO_STREAMING_INTERFACE_ALTERNATE_SETTING This is type
USB_DEVICE_AUDIO_STREAMING
_INTERFACE_ALTERNATE_SETTI
NG.
Types
Name Description
USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE USB Device Audio Function Driver Control Transfer
Handle
USB_DEVICE_AUDIO_EVENT_HANDLER USB Device Audio Event Handler Function Pointer
Type.
USB_DEVICE_AUDIO_EVENT_RESPONSE USB Device Audio Function Driver Event Callback
Response Type
USB_DEVICE_AUDIO_INDEX USB Device Audio Function Driver Index
USB_DEVICE_AUDIO_TRANSFER_HANDLE USB Device Audio Function Driver Transfer Handle
Definition.
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File Name
usb_device_audio.h
Company
Microchip Technology Incorporated
5.9.3 USB Device Layer Library
5.9.3.1 Introduction
Introduces the MPLAB Harmony USB Device Layer
Description
The USB device layer library is part of the USB device stack that is available for the Microchip family of microcontrollers. This
library has a dependency on the USB device driver to interact with the USB peripheral and therefore cannot operate
independently. Within the USB device stack, the USB device layer is basically responsible for enumeration and performing
control transfers. The USB device library implementation adheres to USB Device Framework of chapter-9 of USB specification
2.0.
In the USB device stack, the device layer features the following:
• Supports both USB Full-Speed and Hi-Speed operation
• Based on a modular and event driven architecture
• Supports the PIC32MX and PIC32MZ families of microcontrollers
• Supports composite USB devices
• Contains function drivers to implement the following type of device classes:
• CDC-ACM
• MSD
• Generic
• Audio
• HID
• Supports non-blocking operation and is RTOS friendly
• Designed to integrate readily with other Harmony Middleware
• Supports both interrupt and polling operation
5.9.3.2 Release Notes
MPLAB Harmony Version: v0.70b USB Device Layer Library Version : 0.01 Alpha Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
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Known Issues:
• Limited USB chapter 9 testing performed on HID and MSD function drivers.
• The stack has not been tested for USB Interoperability.
• The USB Device Stack has not been tested with a Real Time Operating System.
• Attach/Detach behavior has been tested in a limited capacity.
• The device stack only supports interrupt mode operation. Polled mode operation will be added in a future release.
• While running the device stack on PIC32MZ microcontroller, the stack requires 3 seconds to initialize. This is due to a
hardware issue with PIC32MZ USB module.
• Device stack operation has been tested with Windows XP and Windows 7 OS based PC USB Host.
5.9.3.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.9.3.4 Using the Library
5.9.3.4.1 Abstraction Model
Describes the Abstraction Model of the USB Device Layer.
Description
The block diagram shows USB device layer interaction with USB controller driver, function drivers, user application and the
system.
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USB Device Layer Software Abstraction Block Diagram
System Interaction
The system is responsible for initializing and de-initializing the device layer. It is also responsible for calling the USB device layer
task routine.
Function driver interaction
The USB device layer interacts with a function driver for following reasons.
• Device layer initializes the function driver when device is configured by the host. This can happen when host issues a set
configuration request to the device. The device layer initializes only those function drivers that are valid for the selected
configuration.
• Device layer de-initializes the function driver when host issues a bus reset or when device is detached from the host or when
host unconfigures the device by setting configuration value to 0.
• The function driver task routines are run by the device layer. This means that function driver tasks runs at the same priority as
device layer task.
• The device layer forwards class/interface specific setup requests from host to function drivers for processing. The function
drivers can use device layer APIs to read data stage from endpoint 0 or write data stage to endpoint 0.
All of the above interactions are initiated by the device layer and hence it is required for a function driver to register a set of
standard APIs with the device layer for initializing/de-initializing the function driver, for handling control transfers and for running
the task routines. Registering of these callback functions with the device layer is compile time option and is done using function
driver registration table. Function driver registration is explained in the subsequent sections of this help file.
User application ( client ) interaction
User application clients can register a callback function with the device layer to get USB device events. Apart from device
events, the clients can interact with USB device layer to know other status like USB speed and remote wakeup status.
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5.9.3.4.2 Library Overview
Provides an overview of the USB Device Layer Library
Description
The USB device layer mainly interacts with system, its clients and function drivers as shown in USB Device Layer Software
Abstraction Block Diagram. Hence the interfaces provided by the USB device layer can be broadly be classified as shown in the
below table. Please refer to section "Library Interface" for more information on APIs, data types and constants.
Library Interface Section Description
System Interaction Functions Provides system module interfaces, device initialization, de-initialization,
re-initialization and task functions
Client Core Functions Provides function to register callbacks, mechanism to pass events to clients
and functions to know the status.
Driver Interaction Functions Provides function driver level interfaces for handling event callbacks and
performing control transfers
5.9.3.5 How the Library Works
5.9.3.5.1 Files to Include
Describes which files to include in project while using the USB Device Layer
Description
Table 1 shows the files that must be included in the project in order to use the USB Device Layer. These files are located in the
framework folder of the MPLAB Harmony installation. It is assumed that the USB Driver files are already included in the project.
Filename Description
\framework\usb\src\dynamic\usb_device.c Contains the USB Device Layer Implementation.
\framework\usb\usb_device.h Must included in every source file that needs to invoke USB Device Layer API.
system_config.h User created file which contains the USB Device Layer Configuration MAcors.
Table 1: Files to be included in USB Device Project
5.9.3.5.2 Initializing the Library
Describes how the USB Device Layer must be initialized
Description
Following are the components that a user must initialize and register with the USB device stack for the proper operation of the
stack.
• Descriptors
• Master descriptor table
• Function registration table
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The subsequent sections of this help file explains how these components must be initialized using code examples.
The flow chart shows the steps that has to be followed by the system and clients to initialize the USB device layer. The system
initializes the USB device layer. After system initializes the device layer, clients can open handle to device layer, setup callback
into the device layer and start capturing the events from the device layer.
Flowchart showing the sequence for initializing the USB device layer
The following code example shows the system side initialization sequence.
Example:
SYS_MODULE_OBJ usbDeviceObj;
DRV_HANDLE usbDevHandle;
// System module initialization
deviceLayerInit.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
// Identifies peripheral (PLIB-level) ID
deviceLayerInit.usbID = USB_ID_1;
// Boolean flag: true -> Stop USB module in Idle Mode
deviceLayerInit.stopInIdle = false;
// Boolean flag: true -> Suspend USB in Sleep Mode
deviceLayerInit.suspendInSleep = false;
// Interrupt Source for USB module
deviceLayerInit.interruptSource = INT_SOURCE_USB_1;
// Number of function drivers registered to this instance of the
USB device layer
deviceLayerInit.registeredFuncCount = 1;
// Function driver table registered to this instance of the USB device layer
deviceLayerInit.registeredFunctions = funcRegistrationTable;
// Pointer to USB Descriptor structure
deviceLayerInit.usbMasterDescriptor = &usbMasterDescriptor;
// USB operation spee.
deviceLayerInit.deviceSpeed = USB_SPEED_HIGH;
// USB device initialization
usbDeviceObj = USB_DEVICE_Initialize(USB_DEVICE_INDEX_0, &deviceLayerInit);
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if (SYS_MODULE_OBJ_INVALID == usbDriverObj)
{
// Handle error
}
while(1)
{
// Call device layer task
USB_DEVICE_Tasks( usbDeviceObj );
}
The following code example shows how a client can open an handle to device layer and use the same.
Example:
void clientIntialize( void )
{
DRV_HANDLE usbDevHandle;
// Open the device layer.
usbDevHandle = USB_DEVICE_Open( USB_DEVICE_INDEX_0 );
if(DRV_HANDLE_INVALID == usbDevHandle)
{
// Handle error
}
// Register a callback with device layer to get event notification (for end point 0)
USB_DEVICE_EventCallBackSet(usbDevHandle, usbDeviceEventCallBack); // Where
usbDeviceEventCallBack is a callback function
// that must be
provided by the client
}
void usbDeviceEventCallBack( USB_DEVICE_EVENTS events, USB_DEVICE_EVENT_DATA * eventData )
{
// Handle all device layer events here.
switch( event )
{
case USB_DEVICE_EVENT_RESET:
case USB_DEVICE_EVENT_DECONFIGURED:
/* Bus reset is detected or device is unconfigured */
/* TODO: Add user code here. */
break;
case USB_DEVICE_EVENT_CONFIGURED:
if( eventData->eventConfigured.configurationValue == 1 )
{
/* The device is in configured state */
/* TODO: Add user code here. */
}
break;
case USB_DEVICE_EVENT_SUSPENDED:
/* Device is suspended */
/* TODO: Add user code here. */
break;
case USB_DEVICE_EVENT_RESUMED:
case USB_DEVICE_EVENT_ATTACHED:
case USB_DEVICE_EVENT_DETACHED:
case USB_DEVICE_EVENT_ERROR:
default:
break;
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}
}
5.9.3.5.2.1 Descriptors
A USB device reports its attributes to host using descriptors that are defined in chapter 9 of USB Specification, Revision 2.0. The
user must initialize device descriptor, configurations descriptor, string descriptors and device qualifier descriptor using static
tables. If the device supports dual speeds then there can be two sets of these descriptors, one for for full speed and another for
high speed. These descriptors are then registered to the USB device stack using master descriptor table.
The following code example shows how the descriptors are initialized in system_config.c file using static tables. Refer to Master
Descriptor Table to know how to register these descriptors into USB device stack.
/* Example USB descriptors for a MSD device */
/* Device Descriptor Table */
const USB_DEVICE_DESCRIPTOR deviceDescriptor =
{
0x12, // Size of this descriptor in bytes
USB_DESCRIPTOR_DEVICE, // DEVICE descriptor type
0x0110, // USB Spec Release Number in BCD format
0x00, // Class Code
0x00, // Subclass code
0x00, // Protocol code
USB_DEVICE_EP0_BUFFER_SIZE, // Max packet size for EP0, see usbcfg.h
0x04D8, // Vendor ID
0x0009, // Product ID: mass storage device demo
0x0001, // Device release number in BCD format
0x01, // Manufacturer string index
0x02, // Product string index
0x03, // Device serial number string index
0x01 // Number of possible configurations
};
/* Configurations Descriptor Table */
const uint8_t configDescriptor[] =
{
/* Configuration Descriptor */
9, // Size of this descriptor in bytes
USB_DESCRIPTOR_CONFIGURATION, // CONFIGURATION descriptor type
0x20,0x00, // Total length of data for this cfg
1, // Number of interfaces in this cfg
1, // Index value of this configuration
0, // Configuration string index
USB_ATTRIBUTE_DEFAULT | USB_ATTRIBUTE_SELF_POWERED, // Attributes, see usbdefs_std_dsc.h
50, // Max power consumption (2X mA)
/* Interface Descriptor */
9, // Size of this descriptor in bytes
USB_DESCRIPTOR_INTERFACE, // INTERFACE descriptor type
0, // Interface Number
0, // Alternate Setting Number
2, // Number of endpoints in this intf
USB_DEVICE_MSD_INTF, // Class code
USB_DEVICE_MSD_INTF_SUBCLASS, // Subclass code
USB_DEVICE_MSD_PROTOCOL, // Protocol code
0, // Interface string index
/* Endpoint Descriptor */
7,
USB_DESCRIPTOR_ENDPOINT,
0x01 | USB_EP_DIRECTION_IN,
USB_TRANSFER_TYPE_BULK,
MSD_IN_EP_SIZE,
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0x00,
0x00,
7,
USB_DESCRIPTOR_ENDPOINT,
0x01 | USB_EP_DIRECTION_OUT,
USB_TRANSFER_TYPE_BULK,
MSD_OUT_EP_SIZE,
0x00,
0x00
};
/* String descriptors Table */
/* Language code string descriptor */
const struct
{
uint8_t bLength;
uint8_t bDscType;
uint16_t string[1];
} sd000 =
{
sizeof(sd000),
USB_DESCRIPTOR_STRING,
{ 0x0409 }
};
/* Manufacturer string descriptor */
const struct
{
const uint8_t bLength;
uint8_t bDscType;
uint16_t string[25];
} sd001 =
{
sizeof(sd001),
USB_DESCRIPTOR_STRING,
{
'M','i','c','r','o','c','h','i','p',' ',
'T','e','c','h','n','o','l','o','g','y',' ','I','n','c','.'
}
};
/* Product string descriptor */
const struct
{
const uint8_t bLength;
uint8_t bDscType;
uint16_t string[22];
} sd002 =
{
sizeof(sd002),
USB_DESCRIPTOR_STRING,
{
'S','i','m','p','l','e',' ','M','S','D',' ',
'D','e','v','i','c','e',' ','D','e','m','o'
}
};
/* Serial number string descriptor. Note: This should be unique for each unit
built on the assembly line. Plugging in two units simultaneously with the
same serial number into a single machine can cause problems. Additionally, not
all hosts support all character values in the serial number string. The MSD
Bulk Only Transport (BOT) specs v1.0 restrict the serial number to consist only
of ASCII characters "0" through "9" and capital letters "A" through "F". */
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const struct
{
uint8_t bLength;
uint8_t bDscType;
uint16_t string[12];
} sd003 =
{
sizeof(sd003),USB_DESCRIPTOR_STRING,
{'1','2','3','4','5','6','7','8','9','9','9','9'}
};
5.9.3.5.2.2 Master Descriptor Table
Master Descriptor Table is a static table that holds collection of pointers that points to USB descriptors. User will have to initialize
the master descriptor table and must register it with the USB device stack. During the device enumeration the stack uses these
information from the Master Descriptor Table to respond to the setup requests from the host. Following code example shows
how to set up the Master Descriptor Table. The Master Descriptor Table must then be registered with the USB device stack while
initializing the USB device layer. Refer to Initializing the Data Structure to know how it can be registered with the USB device
stack.
/* Array of string descriptors */
/* Refer to Descriptors section to see how the
string descriptors sd000 to sd003 are defined */
const uint8_t *const USB_SD_Ptr[4]=
{
(const uint8_t *const)&sd000,
(const uint8_t *const)&sd001,
(const uint8_t *const)&sd002,
(const uint8_t *const)&sd003
};
/* Array of full speed config descriptors */
/* Refer to Descriptors section to see how the
configurations descriptor configDescriptor[] is defined */
const uint8_t *const fullSpeedConfigDescSet[1] =
{
(const uint8_t *const)&configDescriptor[0]
};
/* Initialize the master descriptor table */
const USB_MASTER_DESCRIPTOR usbMasterDescriptor =
{
/* Low/Full speed device descriptor */
/* Refer to Descriptors section to see how deviceDescriptor
is initialized */
(uint8_t *)&deviceDescriptor ,
/* Total number of low/full speed configurations available */
sizeof( fullSpeedConfigDescSet )/sizeof( uint8_t* ) ,
/* Pointer to array of low/full speed configurations descriptors */
( USB_DEVICE_CONFIG_DESCS_PTR )&fullSpeedConfigDescSet[0] ,
/* High speed device descriptor. Not supported in this example
and is set to NULL.*/
NULL,
/* Total number of high speed configurations available.
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Zero for this example */
0,
/* Pointer to array of high speed configurations descriptors.
Not supported in this example*/
NULL,
/* Total number of string descriptors available */
sizeof( USB_SD_Ptr )/sizeof( uint8_t* ),
/* Pointer to array of string descriptors */
(USB_DEVICE_STRING_DESCS_PTR)USB_SD_Ptr,
/* Pointer to full speed dev qualifier. Not supported in this
example */
NULL,
/* Pointer to high speed dev qualifier. Not supported in this
example*/
NULL,
};
5.9.3.5.2.3 Functions Registeration Table
This section explains how function drivers can be registered with the USB device layer using Function Registration Table.
Function Registration Table is a static table and must be configured at compile time. It contains mapping of function driver
instance to USB speed and configuration. This table helps the USB device layer to initialize the appropriate function driver for a
configuration value and device speed selected by the host.
Following code example shows how to build a function registration table.
/* This is a code example that registers MSD function
driver to the USB device stack*/
#define MSD_INDEX 0
const USB_DEVICE_FUNC_REGISTRATION_TABLE funcRegistrationTable[1] =
{
{
/* Speed: Indicating both full/high speeds here
will make the device stack to load MSD function driver
for both the speeds */
USB_SPEED_FULL | USB_SPEED_HIGH,
/* Configuration value */
1,
/* InterfaceNumber */
0,
/* Total number of interfaces in this driver */
1,
/* Instance Index of the MSD function driver that will be loaded
for this configuration value and speed */
MSD_INDEX,
/* MSD initialization data structure. See MSD documentation for this structure */
(void*)&msdInit,
/* Pointer to the structure that contains collection of MSD driver function pointers.
The USB device stack calls out these MSD functions appropriately */
(USB_DEVICE_FUNCTION_DRIVER*) &msdFunctionDriver
}
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};
5.9.3.5.2.4 Initializing the Data Structure
This section explains about the USB device initialization data structure. Before initializing this data structure user must keep the
descriptors table, master descriptor table and function registration table ready and initialized. This structure maps these static
tables to an instance of USB device layer and provides a mechanism to register these static tables with the USB device layer.
Pointer to this initialization structure is then passed to USB device layer using USB_DEVICE_Initialize() function. Following code
example shows how to initialize this structure and register the same with the USB device stack.
/* USB Device initialization data structure */
const USB_DEVICE_INIT usbDevInitData =
{
/* System module initialization */
{SYS_MODULE_POWER_RUN_FULL},
/* Identifies peripheral (PLIB-level) ID */
USB_ID_1,
/* Stop in idle */
false,
/* Stop in sleep */
false,
/* Interrupt source */
INT_SOURCE_USB_1,
/* Number of functions registered to this instance of the
USB device layer. See Function Registration Table section of this help file.
We are registering on */
(sizeof(funcRegistrationTable)/sizeof(USB_DEVICE_FUNC_REGISTRATION_TABLE)),
/* Function driver table registered to this instance of the USB device layer*/
(USB_DEVICE_FUNC_REGISTRATION_TABLE*)funcRegistrationTable,
/* Pointer to Master Descriptor structure.
See Master Descriptor Table section of this help file. */
(USB_MASTER_DESCRIPTOR*)&usbMasterDescriptor
};
/* This is an example that shows how the device initialization structure
is registered with USB_DEVICE_Initialize() */
typedef struct
{
/* device layer object returned by device layer init function */
SYS_MODULE_OBJ usbDevObject;
/* Controller driver object returned by controller driver init function */
SYS_MODULE_OBJ usbCDObject;
} APP_DRV_OBJECTS;
typedef struct
{
/* device layer handle returned by device layer open function */
DRV_HANDLE usbDevHandle;
} APP_DATA;
/* Application objects */
APP_DRV_OBJECTS appDrvObject;
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/* Application data */
APP_DATA appData =
{
/* device layer handle */
DRV_HANDLE_INVALID
};
void SYS_Initialize ( void )
{
/* Set up cache and wait states for
* maximum performance. */
SYSTEMConfigPerformance(80000000);
/* Initialize the BSP */
BSP_Initialize( );
/* Initialize the USB device layer.
Note the registration of initialization data structure with the USB
device layer */
appDrvObject.usbDevObject = USB_DEVICE_Initialize (USB_DEVICE_INDEX_0 ,
( SYS_MODULE_INIT* ) & usbDevInitData);
/* check if the object returned by the device layer is valid */
SYS_ASSERT((SYS_MODULE_OBJ_INVALID != appDrvObject.usbDevObject),
"Invalid USB DEVICE object");
/* open an instance of the device layer */
appData.usbDevHandle = USB_DEVICE_Open( USB_DEVICE_INDEX_0, 0 );
/* Register a callback with device layer to get event notification
(for end point 0) */
USB_DEVICE_EventCallBackSet(appData.usbDevHandle,
APP_UsbDeviceEventCallBack);
/* Enable USB device layer */
USB_DEVICE_Attach(appData.usbDevHandle);
/* Initialize the Application */
APP_Initialize ( );
/* Initializethe interrupt system */
SYS_INT_Initialize();
/* set priority for USB interrupt source */
SYS_INT_VectorPrioritySet(INT_VECTOR_USB, INT_PRIORITY_LEVEL3);
/* set sub-priority for USB interrupt source */
SYS_INT_VectorSubprioritySet(INT_VECTOR_USB, INT_SUBPRIORITY_LEVEL3);
/* Initialize the global interrupts */
SYS_INT_Enable();
}
5.9.3.5.3 Device Events
Describes the USB Device Layer Events
Description
The device layer generates following events. The application clients can capture these events by registering a callback function
into the device layer using USB_DEVICE_EventCallBackSet() function.
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Events Description
USB_DEVICE_EVENT_RESET USB bus reset occurred. This event is an indication to the application client that
device layer has de-initialized the function drivers. For application client, this event
means that USB device has moved to default state and any further communication
with the function drivers must be stopped.
USB_DEVICE_EVENT_SUSPENDED This event is an indication to the application client that device is suspended and it
can put the device to power-down mode if required.
USB_DEVICE_EVENT_RESUMED Event that indicates that device has resumed from suspended state.
USB_DEVICE_EVENT_ERROR This event is an indication to the application client that an error occurred on the
USB bus.
USB_DEVICE_EVENT_SOF This event is generated for every new start of frame. Application client can use this
SOF event for general time based house keeping activities.
USB_DEVICE_EVENT_DETACHED This event is an indication to the application client that the device is detached from
the host and device layer is about to de-initialize the function drivers. For
application client, this event means that it has to stop any further interactions with
the function driver.
USB_DEVICE_EVENT_DECONFIGURED This event is generated when the USB host unconfigures the device by configuring
the device to configuration value 0.
USB_DEVICE_EVENT_CONFIGURED This event is generated when the device is configured by the host. The device
layer loads all the function drivers applicable to that configuration and application
client can interact with function drivers.
USB_DEVICE_EVENT_ATTACHED Device is attached to the USB, but is not powered.
The following code example shows how the application clients can register callback function with the to capture these events
Example:
void SYS_Initialize( void )
{
/* Add user initialization code here */
/* Register a callback with device layer to get event notification (for end point 0) */
USB_DEVICE_EventCallBackSet(appData.usbDevHandle, APP_UsbDeviceEventCallBack);
/* Enable the device */
USB_DEVICE_Attach(appData.usbDevHandle);
}
void APP_UsbDeviceEventCallBack( USB_DEVICE_EVENT event, USB_DEVICE_EVENT_DATA * pEventData )
{
switch( event )
{
case USB_DEVICE_EVENT_RESET:
case USB_DEVICE_EVENT_DECONFIGURED:
/* USB device is reset or device is deconfigured. */
/* Add user code here */
break;
case USB_DEVICE_EVENT_CONFIGURED:
/* Device is configured */
/* Check the configuration value */
if(pEventData->eventConfigured.configurationValue == 1)
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{
/* Host selected configuration value 1 */
}
break;
case USB_DEVICE_EVENT_SUSPENDED:
/* Add user's code here to handle USB bus suspend event */
break;
case USB_DEVICE_EVENT_RESUMED:
case USB_DEVICE_EVENT_ERROR:
case USB_DEVICE_EVENT_SOF:
case USB_DEVICE_EVENT_DETACHED:
case USB_DEVICE_EVENT_ATTACHED:
default:
break;
}
}
5.9.3.5.4 Developing Vendor-specific Function Drivers
This topic describes the development of vendor-specific function drivers.
Description
This section is important for the users who wish to develop their own function drivers. This section covers the interface between
the function driver and USB device layer. The framework explains how the USB device layer manages function driver through a
set of callbacks.
Framework showing the interaction between Function Driver and Device Layer
The USB device layer manages the function driver using a set of standard callout functions. A function driver must implement
these callout functions as described in the following paragraphs. The pointer to these callout functions must be packed in
USB_DEVICE_FUNCTION_DRIVER structure and pointer to this structure must be registered with the USB device layer using
function registration table.
InitializeByDescriptor()
Device layer initializes a function driver by calling this function when host issues a set configuration request. This function is
called multiple times by the device layer for every descriptor that is found under the interface owned by the function driver. The
function driver must implement appropriate logic to configure itself for each descriptor. This function is called from with in the
interrupt context. Therefore the function driver design must ensure that the execution time of this function is short.
The example code for initializeByDescriptor() is shown below.
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/******************************************************************************
Function:
void USB_DEVICE_MYCLASS_InitializeByDescriptorType ( SYS_MODULE_INDEX iFunctionDriver,
SYS_MODULE_INDEX iDriver,
SYS_MODULE_INDEX iUsbDevice,
void* funcDriverInit ,
uint8_t* pConfigDesc )
Summary:
USB Device MYCLASS function driver initialization. The device layer calls this function to
initialize the function driver based on the descriptor found (from the configurations
descriptor).
Precondition:
None.
Parameters:
iFunctionDriver : Function driver instance index.
usbDeviceHandle : USB device handle for communicating with the USB device layer.
funcDriverInit : Pointer to function driver init data structure. User can have his own
function driver init data structure and can register the same in the
function registration table.
intfNumber : The interface number the descriptor identified
by descriptorType belongs to.
altSetting : The alternate setting of the descriptor that is identified
by descriptorType belongs to.
pDescriptor : Pointer to the descriptor. This can point to interface descriptor
or endpoint descriptor or any class specific descriptor based on the
descriptorType.
Returns:
None.
Remarks:
None
*/
void USB_DEVICE_MYCLASS_InitializeByDescriptorType(SYS_MODULE_INDEX iFunctionDriver,
DRV_HANDLE usbDeviceHandle,
void* funcDriverInit, uint8_t intfNumber, uint8_t
altSetting,
uint8_t descriptorType, uint8_t * pDescriptor)
{
USB_ENDPOINT endpoint;
USB_ENDPOINT_DESCRIPTOR endpointDescriptor
switch(descriptorType )
{
case USB_DESCRIPTOR_ENDPOINT:
// Get the endpoint
endpointDescriptor = (USB_ENDPOINT_DESCRIPTOR *)pDescriptor;
// Enable endpoint.
USB_DEVICE_EndpointEnable(usbDeviceHandle, endpointDescriptor->endpoint,
endpointDescriptor->transferType,
endpointDescriptor->wMaxPacketSize);
break;
case USB_DESCRIPTOR_INTERFACE:
// Do interface specific initialization here.
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break;
default:
// Handle class specific descriptor.
break;
}
}
DeInitialize()
Device layer de-initializes a function driver by calling this callout function when host issues a USB bus reset or when host
deconfigures the device by selecting configuration value as 0. In the DeInitialize() function, user must implement functionalities to
close endpoints and cancel the IRPs owned by that particular function driver. This callout function is called from with in the
interrupt context. Therefore the design must ensure that the execution time of this callout function is short.
The example code for DeInitialize() is shown below.
/******************************************************************************
Function:
void USB_DEVICE_MYCLASS_DeInitialize( SYS_MODULE_INDEX iFunctionDriver )
Summary:
Deinitializes an instance of the MYCLASS.
Description:
Parameters:
iFunctionDriver - function driver index
Returns:
None.
*/
static void USB_DEVICE_MYCLASS_DeInitialize( SYS_MODULE_INDEX iFunctionDriver )
{
/* Cancel all IRPs on the endpoint/s used by
MYCLASS function driver */
USB_DEVICE_IRPCancelAll( usbDeviceHandle, endpoint );
/* Disable endpoints used by this function driver */
USB_DEVICE_EndpointDisable( usbDeviceHandle, endpoint );
}
ControlTransferNotification()
Only standard setup packets whose recipient is device/endpoint is supported by the device layer. All other types of setup packet
targeted to interface/class is forwarded to appropriate function driver using "controlTransferNotification()" callout function. Setup
packets with "other" as recipient is discarded by the device layer and and a STALL is generated on the control endpoint. In this
callout function, the function driver has to parse the setup packet. If the request is supported, function driver can initiate data
stage by using USB_DEVICE_ControlSend/USB_DEVICE_ControlReceive functions . If the request is not supported, function
driver can stall the control endpoints by using USB_DEVICE_ControlStatus function. This callout function is called from with in
the interrupt context. Therefore the design must ensure that the execution time of this callout function is short. This is not a
mandatory callout function and can be set to NULL if a function driver does not support class specific setup request.
/******************************************************************************
Function:
void USB_DEVICE_MYCLASS_ControlTransferHandler(
USB_DEVICE_CONTROL_TRANSFER_HANDLE controlHandle,
SYS_MODULE_INDEX iFunctionDriver,
USB_DEVICE_CONTROL_TRANSFER_EVENT controlEvent,
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void * pEventData )
Summary:
Handles all MYCLASS related control transfers.
Description:
Parameters:
controlHandle - Control Handle
iFunctionDriver - Function driver index
controlEvent - Control transfer event
pEventData - Pointer to event related data
Returns:
None.
*/
void USB_DEVICE_MYCLASS_ControlTransferHandler(
USB_DEVICE_CONTROL_TRANSFER_HANDLE controlHandle,
SYS_MODULE_INDEX iFunctionDriver,
USB_DEVICE_CONTROL_TRANSFER_EVENT controlEvent,
USB_DEVICE_CONTROL_TRANSFER_EVENT_DATA * pEventData )
{
USB_DEVICE_HID_INSTANCE *hidThisInstance;
SETUP_PKT * setupPkt = pEventData->setupRequest;
USB_DEVICE_HID_EVENT_DATA eventData;
hidThisInstance = &gUsbDeviceHidInstance[iHID] ;
if( controlEvent == USB_DEVICE_CONTROL_SETUP_REQUEST )
{
/* Setup request is received */
if( setupPkt->bmRequestType & SETUP_RECIPIENT_INTERFACE)
{
/* Handle interface specific requests here */
/* Use USB_DEVICE_ControlSend, USB_DEVICE_ControlReceive or
USB_DEVICE_ControlStatus functions appropriately to respond to
setup packet */
}
else if( ( setupPkt->bmRequestType & SETUP_TYPE_CLASS ) &&
( hidThisInstance->appCallBack != NULL ) )
{
/* Handle class specific requests here */
/* Use USB_DEVICE_ControlSend, USB_DEVICE_ControlReceive or
USB_DEVICE_ControlStatus functions appropriately to respond to
setup packet */
}
}
else if ( controlEvent == USB_DEVICE_CONTROL_DATA_RECEIVED )
{
/* Data stage is received. Handle the data */
/* Use USB_DEVICE_ControlStatus functions appropriately to respond to
data stage */
}
else if ( controlEvent == USB_DEVICE_CONTROL_DATA_SENT )
{
/* Data stage is sent */
/* This is just a success event. If required inform the same to
application clients here. */
}
}
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Tasks()
All function driver tasks are called from with in the device layer tasks. Device layer can call function driver task routine using this
function driver provided callout function. With in this callout function, a function driver can implement its task specific routines.
This is not a mandatory callback function. Set this callout function to NULL if it is not supported by the function driver.
/******************************************************************************
Function:
void USB_DEVICE_MYCLASS_Tasks ( SYS_MODULE_INDEX iFunctionDriver )
Summary:
This function handles the main MSD state machine.
Description:
Precondition:
None.
Parameters:
iFunctionDriver : Function driver index.
Returns:
None.
Remarks:
None
*/
void USB_DEVICE_MYCLASS_Tasks ( SYS_MODULE_INDEX iFunctionDriver )
{
/* Perform all function driver tasks here */
}
Registering the callout functions
To register the above callout functions with the device layer, create a static table of type USB_DEVICE_FUNCTION_DRIVER
structure with pointers to callout functions. The structure must then be registered to USB device layer using function registration
table. Here is the code snippet that shows the same.
/* Make a table of USB_DEVICE_FUNCTION_DRIVER with pointers to callout functions */
const USB_DEVICE_FUNCTION_DRIVER myclassDriver = {
/* MYCLASS init function */
.initializeByDescriptor = USB_DEVICE_MYCLASS_InitializeByDescriptorType ,
/* MYCLASS de-init function */
.deInitialize = USB_DEVICE_MYCLASS_Deinitialization ,
/* MYCLASS set-up packet handler */
.controlTransferNotification = USB_DEVICE_MYCLASS_ControlTransferHandler ,
/* MYCALSS tasks function */
.tasks = USB_DEVICE_MYCLASS_Tasks
};
/* Using the function registration table register MYCLASS driver with USB device stack */
const USB_DEVICE_FUNC_REGISTRATION_TABLE funcRegistrationTable[1] =
{
{
// Speed
USB_SPEED_FULL | USB_SPEED_HIGH,
// Configuration value
1,
// interface number of MYCLASS
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0,
// number of interfaces in MYCLASS
1,
// instance index of MYCLASS
0,
// MYCLASS data init structure. This structure is class specific data structure
// that will be passed as funcDriverInit parameter to
// USB_DEVICE_MYCLASS_InitializeByDescriptorType()
&myclassInit,
// My class driver structure having pointers to all the callouts
&myclassDriver
}
};
5.9.3.5.5 Library Configuration
Describes how to configure the USB Device Library
Macros
Name Description
USB_DEVICE_MAX_CLIENTS Sets the maximum possible number of clients an instance of the USB
device can open using USB_DEVICE_Open.
USB_DEVICE_MAX_FUNCTION_DRIVER Sets the maximum number of function drivers at a time that are
supported by an instance of the USB device layer.
USB_DEVICE_MAX_INSTANCES Sets the maximum possible number of instances of the USB device
that can be instantiated by using USB_DEVICE_Initialize() routine.
Description
The application designer must specify the following configuration parameters while using the USB Device Library. The
configuration macros that implement these parameters must be located in the system_config.h file in the application project and
a compiler include path (to point to the folder that contains this file) should be specified.
Configuration Macro Name Description Comments
USB_DEVICE_MAX_INSTANCES Sets the maximum
possible number of
instances of the USB
device that can be
instantiated by using
USB_DEVICE_Initialize()
routine.
In case of microcontrollers with more than one USB peripheral,
the value of this constant can be increased to support more
than one instances of USB device layer. The static
implementation supports only one instance. Setting the value of
this constant to > 1 has no effect on static implementations.
Only in dynamic implementations of the USB device layer this
value can be set > 1. The USB device layer has to support at
least one instance. Therefore, ensure that the value of this
constant is set to > 0.Increasing the instance count consumes
RAM and can lead to performance degradation.
USB_DEVICE_MAX_CLIENTS Sets the maximum
possible number of
clients an instance of the
USB device can open
using
USB_DEVICE_Open.
If multiple clients need USB device layer services, user can set
the value of this constant to > 1. The value of this macro must
not be set to zero. Each instance of the USB device layer must
support at least one client. Therefore, set the value to at least 1.
The static single client implementation of the USB device layer
supports only one client. Therefore, increasing the value of this
constant > 1 has no effect in static single client implementation.
Increasing the client count consumes RAM and can lead to
performance degradation.
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5.9.3.5.5.1 USB_DEVICE_MAX_CLIENTS Macro
C
#define USB_DEVICE_MAX_CLIENTS 1
Description
If multiple clients need USB device layer services, user can set the value of this constant to > 1.
Remarks
The value of this macro must not be set to zero. Each instance of the USB device layer must support at least one client.
Therefore, set the value to at least 1.
The static single client implementaion of the USB device layer supports only one client. Therefore, increasing the value of this
constant > 1 has no effect in static single client implementation.
Increase the client count consumes RAM and can lead to performance degradation.
5.9.3.5.5.2 USB_DEVICE_MAX_FUNCTION_DRIVER Macro
C
#define USB_DEVICE_MAX_FUNCTION_DRIVER 3
Description
This constant sets the maximum number of function drivers that are loaded by a USB device instance for a configuration set by
the USB host.
Remarks
None.
5.9.3.5.5.3 USB_DEVICE_MAX_INSTANCES Macro
C
#define USB_DEVICE_MAX_INSTANCES 1
Description
In case of microcontrollers with more than one USB peripheral, the value of this constant can be increased to support more than
one instances of USB device layer.
Remarks
The static implementation supports only one instance. Setting the value of this constant to > 1 has no effect on static
implementations. Only in dynamic implementations of the USB device layer this value can be set > 1.
The USB device layer has to support at least one instance. Therefore, ensure that the value of this constant is set to > 0.
Increasing the instance count consumes RAM and can lead to performance degradation.
5.9.3.6 Library Interface
Data Types and Constants
Name Description
USB_DEVICE_INDEX_0 USB device layer index definitions.
USB_DEVICE_INDEX_1 This is macro USB_DEVICE_INDEX_1.
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USB_DEVICE_INDEX_2 This is macro USB_DEVICE_INDEX_2.
USB_DEVICE_INDEX_3 This is macro USB_DEVICE_INDEX_3.
USB_DEVICE_INDEX_4 This is macro USB_DEVICE_INDEX_4.
USB_DEVICE_INDEX_5 This is macro USB_DEVICE_INDEX_5.
USB_DEVICE_INDEX_COUNT Number of valid USB Device Layer indices
USB_DEVICE_CALLBACK Pointer to a USB Device Layer callback function data
type for bus events.
USB_DEVICE_CONFIG_DESCS_PTR Pointer to an array that contains pointer to configuration
descriptors.
USB_DEVICE_CONTROL_STATUS This enumerated data-type identifies the status stage of
control transfer.
USB_DEVICE_CONTROL_TRANSFER_CALLBACK
USB_DEVICE_CONTROL_TRANSFER_EVENT This datatype defines the different control transfer events.
USB_DEVICE_CONTROL_TRANSFER_EVENT_DATA USB device control transfer event data.
USB_DEVICE_CONTROL_TRANSFER_HANDLE Data type of USB device control transfer handle.
USB_DEVICE_CONTROL_TRANSFER_RESULT Enumerated data type identifying results of a control
transfer.
USB_DEVICE_EVENT Enumerated data-type identifying the bus events that has
occurred in the USB device layer.
USB_DEVICE_EVENT_DATA Data assosciated with USB bus events.
USB_DEVICE_EVENT_DATA_CONFIGURED Data-type that holds the data related to USB device
configured event.
USB_DEVICE_FUNC_REGISTRATION_TABLE A function driver has to be registered with the USB device
layer using this structure.
USB_DEVICE_FUNCTION_DRIVER A function driver has to expose standard APIs to device
layer using following structure.
USB_DEVICE_HANDLE Data type for USB device handle.
USB_DEVICE_INIT This structure has to be initialized by the
system/application and must be passed as parameter to
USB_DEVICE_Initialize().
USB_DEVICE_POWER_STATE Enumerated data type that identifies if the device is self
powered or bus powered .
USB_DEVICE_REMOTE_WAKEUP_STATUS Enumerated data type that identifies if the remote wakeup
status of the device.
USB_DEVICE_STATE Standard USB device states as described in Chapter-9 of
USB 2.0 Specification.
USB_DEVICE_STRING_DESCS_PTR Pointer to an array that contains pointer to string
descriptors.
USB_MASTER_DESCRIPTOR Global USB descriptor structure containing pointers to
standard USB descriptor structures.
USB_DEVICE_ENDPOINT_TABLE_SIZE This is macro USB_DEVICE_ENDPOINT_TABLE_SIZE.
USB_DEVICE_HANDLE_INVALID Macro that defines the value of invalid device handle.
Client Core Functions
Name Description
USB_DEVICE_Open Opens the specified USB device layer instance and returns a handle to
it.
USB_DEVICE_ControlReceive Receives data stage of the control transfer from host to device.
USB_DEVICE_ControlSend Sends data stage of the control transfer from device to host.
USB_DEVICE_Attach This function will attach the device to the USB.
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USB_DEVICE_Detach This function will detach the device from the USB.
USB_DEVICE_Status Provides the current status of the USB device layer
USB_DEVICE_ClientStatus Gets the current client-specific status of the USB device layer.
USB_DEVICE_ResumeStart This function will start the resume signalling.
USB_DEVICE_ResumeStop This function will stop the resume signalling.
USB_DEVICE_GetDeviceSpeed Informs the client of the current operation speed of the USB bus.
USB_DEVICE_GetDeviceState Returns the current state of the USB device.
USB_DEVICE_GetConfigurationValue Informs the client of the current USB device configuration set by the
USB host.
USB_DEVICE_RemoteWakeupIsEnabled Gets the "Remote wakeup" status of the device.
USB_DEVICE_PowerStateSet Sets power state of the device.
Driver Interaction Functions
Name Description
USB_DEVICE_ControlStatus Initiates status stage of the control transfer.
USB_DEVICE_EndpointEnable This function enables a endpoint for the specified direction and endpoint size.
USB_DEVICE_EndpointIsEnabled This function returns the enable/ disable status of the specified endpoint and
direction.
USB_DEVICE_EndpointIsStalled This function returns the stall status of the specified endpoint and direction.
USB_DEVICE_EndpointStall This function stalls an endpoint in the specified direction.
USB_DEVICE_EndpointStallClear This function clears the stall on an endpoint in the specified direction.
USB_DEVICE_IRPCancelAll This function cancels all IRPs that are queued and in progress at the specified
endpoint.
USB_DEVICE_IRPSubmit This function submits a I/O Request Packet (IRP) for processing to the USB
Driver.
System Interaction Functions
Name Description
USB_DEVICE_Deinitialize Deinitializes the specified instance of the USB device layer.
USB_DEVICE_Close Closes an opened handle to an instance of the USB device layer.
USB_DEVICE_Initialize Creates and initializes an instance of the USB device layer.
USB_DEVICE_ControlEventCallBackSet Client can register its call-back function into the device layer to get
control transfer events.
USB_DEVICE_Reinitialize Reinitializes the USB device layer
USB_DEVICE_EndpointDisable This function disables an endpoint.
USB_DEVICE_EventCallBackSet Client can register its call-back function into the device layer.
USB_DEVICE_Tasks USB Device layer calls all other function driver tasks in this function. It
also generates and forwards events to its clients.
Description
This section describes the Application Programming Interface (API) functions of the USB device layer library
Refer to each section for a detailed description.
5.9.3.6.1 System Interaction Functions
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5.9.3.6.1.1 USB_DEVICE_Deinitialize Function
C
void USB_DEVICE_Deinitialize(
SYS_MODULE_OBJ usbDeviceObj
);
Description
This function deinitializes the specified instance of the USB device layer, disabling its operation (and any hardware) and
invalidates all of the internal data.
Preconditions
Function USB_DEVICE_Initialize must have been called before calling this routine and a valid SYS_MODULE_OBJ must have
been returned.
Parameters
Parameters Description
object USB device layer object handle, returned by USB_DEVICE_Initialize
Returns
None.
Remarks
Once the Initialize operation has been called, the Deinitialize operation must be called before the Initialize operation can be
called again.
Example
5.9.3.6.1.2 USB_DEVICE_Close Function
C
void USB_DEVICE_Close(
USB_DEVICE_HANDLE usbDeviceHandle
);
Description
This function closes an opened handle to an instance of the USB device layer, invalidating the handle.
Preconditions
The USB_DEVICE_Initialize function must have been called for the specified device layer instance. USB_DEVICE_Open must
have been called to obtain a valid opened device handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from USB_DEVICE_Open
Returns
None
Remarks
After calling this routine, the handle passed in "usbDevHandle" must not be used with any of the remaining driver routines. A
new handle must be obtained by calling USB_DEVICE_Open() before the client may use the device layer again.
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Example
USB_DEVICE_HANDLE usbDeviceHandle;
// Before opening a handle, USB device must have been initialized
// by calling USB_DEVICE_Initialize().
usbDeviceHandle = USB_DEVICE_Open( USB_DEVICE_INDEX_0 );
if(USB_DEVICE_HANDLE_INVALID == usbDeviceHandle)
{
//Failed to open handle.
}
.................
.................
// User's code
.................
.................
// Close handle
USB_DEVICE_Close( usbDevHandle );
5.9.3.6.1.3 USB_DEVICE_Initialize Function
C
SYS_MODULE_OBJ USB_DEVICE_Initialize(
const SYS_MODULE_INDEX instanceIndex,
const SYS_MODULE_INIT * const init
);
Description
This function initializes an instance of USB device layer, making it ready for clients to open and use it. The number of instances
is limited by the value of macro USB_DEVICE_MAX_INSTANCES.
Preconditions
None.
Parameters
Parameters Description
instanceIndex In case of microcontrollers with multiple USB peripherals, user can create multiple
instances of USB device layer. Parameter instanceIndex identifies this instance.
init Pointer to a data structure containing any data necessary to initialize the USB
device layer
Returns
If successful, returns a valid handle to a device layer object. Otherwise, it returns SYS_MODULE_OBJ_INVALID.
Remarks
This routine must be called before any other USB Device Layer routine is called and after the initialization of USB Device Driver.
This routine should only be called once during system initialization.
Example
USB_DEVICE_INIT deviceLayerInit;
SYS_MODULE_OBJ usbDeviceObj;
// System module initialization
deviceLayerInit.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
// Identifies peripheral (PLIB-level) ID
deviceLayerInit.usbID = USB_ID_1;
// Boolean flag: true -> Stop USB module in Idle Mode
deviceLayerInit.stopInIdle = false;
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// Boolean flag: true -> Suspend USB in Sleep Mode
deviceLayerInit.suspendInSleep = false;
// Interrupt Source for USB module
deviceLayerInit.interruptSource = INT_SOURCE_USB_1;
// Number of function drivers registered to this instance of the
USB device layer
deviceLayerInit.registeredFuncCount = 1;
// Function driver table registered to this instance of the USB device layer
deviceLayerInit.registeredFunctions = funcRegistrationTable;
// Pointer to USB Descriptor structure
deviceLayerInit.usbMasterDescriptor = &usbMasterDescriptor;
// USB device initialization
usbDeviceObj = USB_DEVICE_Initialize(USB_DEVICE_INDEX_0, &deviceLayerInit);
if (SYS_MODULE_OBJ_INVALID == usbDeviceObj)
{
// Handle error
}
5.9.3.6.1.4 USB_DEVICE_ControlEventCallBackSet Function
C
USB_ERROR USB_DEVICE_ControlEventCallBackSet(
USB_DEVICE_HANDLE usbDeviceHandle,
const USB_DEVICE_CONTROL_TRANSFER_CALLBACK callBackFunc
);
Description
The USB Device Layer notifies the control transfer events to the client by calling callBackFunc.
Preconditions
The device layer must have been initialized by calling USB_DEVICE_Initialize and a valid handle to the instance must have been
obtained by calling USB_DEVICE_Open.
Parameters
Parameters Description
usbDeviceHandle Pointer to the device layer handle that is returned from USB_DEVICE_Open
callBackFunc Pointer to the control transfer event handler. The device layer notifies the client
about control transfer event by calling this function.
Returns
Returns USB_ERROR_NONE if successful.
Remarks
None.
Example
5.9.3.6.1.5 USB_DEVICE_Reinitialize Function
C
void USB_DEVICE_Reinitialize(
SYS_MODULE_OBJ usbDeviceObj,
const SYS_MODULE_INIT * const init
);
Description
This function reinitializes the USB device layer.
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Preconditions
USB device driver and USB device layer must have been initialized.
Parameters
Parameters Description
usbDeviceObj Driver object handle, returned by USB_DEVICE_Initialize
init Pointer to a data structure containing any data necessary to reinitialize the USB
device layer.
Returns
None
Remarks
This function can be called multiple times to reinitialize the USB device layer.
This operation reinitializes all the module variables of the USB device layer associated with the instance specified by the
parameter "usbDeviceObj".
Example
USB_DEVICE_INIT deviceLayerInit;
// System module initialization
deviceLayerInit.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
// Identifies peripheral (PLIB-level) ID
deviceLayerInit.usbID = USB_ID_1;
// Boolean flag: true -> Stop USB module in Idle Mode
deviceLayerInit.stopInIdle = false;
// Boolean flag: true -> Suspend USB in Sleep Mode
deviceLayerInit.suspendInSleep = false;
// Interrupt Source for USB module
deviceLayerInit.interruptSource = INT_SOURCE_USB_1;
// Number of function drivers registered to this instance of the
USB device layer
deviceLayerInit.registeredFuncCount = 1;
// Function driver table registered to this instance of the USB device layer
deviceLayerInit.registeredFunctions = funcRegistrationTable;
// Pointer to USB Descriptor structure
deviceLayerInit.usbMasterDescriptor = &usbMasterDescriptor;
// USB device initialization
usbDeviceObj = USB_DEVICE_Initialize(USB_DEVICE_INDEX_0, &deviceLayerInit);
if (SYS_MODULE_OBJ_INVALID == usbDeviceObj)
{
}
// Do something here.
// Re-initialize if required.
// System module initialization
deviceLayerInit.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
// Identifies peripheral (PLIB-level) ID
deviceLayerInit.usbID = USB_ID_1;
// Boolean flag: true -> Stop USB module in Idle Mode
deviceLayerInit.stopInIdle = false;
// Boolean flag: true -> Suspend USB in Sleep Mode
deviceLayerInit.suspendInSleep = false;
// Interrupt Source for USB module
deviceLayerInit.interruptSource = INT_SOURCE_USB_1;
// Number of function drivers registered to this instance of the
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USB device layer
deviceLayerInit.registeredFuncCount = 1;
// Function driver table registered to this instance of the USB device layer
deviceLayerInit.registeredFunctions = funcRegistrationTable;
// Pointer to USB Descriptor structure
deviceLayerInit.usbMasterDescriptor = &usbMasterDescriptor;
USB_DEVICE_ReInitialize(USB_DEVICE_INDEX_0, &deviceLayerInit);
5.9.3.6.1.6 USB_DEVICE_EndpointDisable Function
C
USB_ERROR USB_DEVICE_EndpointDisable(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_ENDPOINT endpointAndDirection
);
Description
This function disables an endpoint. If the endpoint type is control type then both directions are disabled. For non-control
endpoints, the function disables one direction at a time.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
endpointAndDirection Specifies the endpoint and direction.
Returns
USB_ERROR_NONE - The endpoint was successfully enabled. USB_ERROR_DEVICE_ENDPOINT_INVALID - If the endpoint
that is being accessed is is out of the valid endpoint defined for this driver instance.
Remarks
This function must not be called by the application clients. Application has no access to modify the endpoint features.
Example
// This code snippet shows an example of how to disable
// a control endpoint. Note that the direction parameter is ignored.
// For a control endpoinnt, both the directions are disabled.
handle = USB_DEVICE_Open(USB_DEVICE_INDEX_0);
USB_ENDPOINT ep;
ep.endpoint = 0;
ep.direction = USB_DATA_DIRECTION_DEVICE_TO_HOST;
USB_DEVICE_EndpointDisable(handle, ep );
// This code snippet shows an example of how to disable a BULK IN
// endpoint
USB_ENDPOINT ep;
ep.endpoint = 1;
ep.direction = USB_DATA_DIRECTION_DEVICE_TO_HOST;
USB_DEVICE_EndpointDisable(handle, ep );
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5.9.3.6.1.7 USB_DEVICE_EventCallBackSet Function
C
USB_ERROR USB_DEVICE_EventCallBackSet(
USB_DEVICE_HANDLE usbDeviceHandle,
const USB_DEVICE_CALLBACK callBackFunc
);
Description
The USB Device Layer notifies the event to the client by calling callBackFunc.
Preconditions
The device layer must have been initialized by calling USB_DEVICE_Initialize and a valid handle to the instance must have been
obtained by calling USB_DEVICE_Open.
Parameters
Parameters Description
usbDeviceHandle Pointer to the device layer handle that is returned from USB_DEVICE_Open
callBackFunc Pointer to the call back function. The device layer calls notifies the client about bus
event by calling this function.
Returns
Returns USB_ERROR_NONE if successful.
Remarks
None.
Example
5.9.3.6.1.8 USB_DEVICE_Tasks Function
C
void USB_DEVICE_Tasks(
SYS_MODULE_OBJ object
);
Description
This function must be periodically called by the user application. The USB Device layer calls all other function driver tasks in this
function. It also generates and forwards events to its clients.
Preconditions
Device layer must have been initialized by calling USB_DEVICE_Initialize.
Parameters
Parameters Description
devLayerObj Pointer to the Device Layer Object that is returned from USB_DEVICE_Initialize
Returns
none.
Remarks
This function must be called only after the device layer is initialized by calling function USB_DEVICE_Initialize.
Example
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5.9.3.6.2 Client Core Functions
5.9.3.6.2.1 USB_DEVICE_Open Function
C
USB_DEVICE_HANDLE USB_DEVICE_Open(
const SYS_MODULE_INDEX instanceIndex,
const DRV_IO_INTENT intent
);
Description
This function opens the USB device layer instance specified by instance index and provides a handle that must be provided to all
other client-level operations to identify the caller and the instance of the USB device layer. The number of handles a client can
open is limited by the value set to USB_DEVICE_MAX_CLIENTS.
Preconditions
This function must be called after USB device driver initialization and after the initialization of USB Device Layer.
Parameters
Parameters Description
instanceIndex USB device layer instance index
intent Zero or more of the values from the enumeration DRV_IO_INTENT ORed together
to indicate the intended use of the driver
Returns
If successful, returns a valid handle to a device layer object. Otherwise, it returns SYS_MODULE_OBJ_INVALID.
Remarks
This routine must be called after USB device driver initialization and after the initialization of USB Device Layer. This routine
should be called only once during system initialization.
Example
USB_DEVICE_HANDLE usbDeviceHandle;
// Before opening a handle, USB device must have been initialized
// by calling USB_DEVICE_Initialize().
usbDeviceHandle = USB_DEVICE_Open( USB_DEVICE_INDEX_0, DRV_IO_INTENT_BLOCKING );
if(USB_DEVICE_HANDLE_INVALID == usbDeviceHandle)
{
//Failed to open handle.
}
5.9.3.6.2.2 USB_DEVICE_ControlReceive Function
C
USB_DEVICE_CONTROL_TRANSFER_RESULT USB_DEVICE_ControlReceive(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_DEVICE_CONTROL_TRANSFER_HANDLE controlXferHandle,
void * data,
size_t length
);
Preconditions
Client handle should be valid.
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Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
controlXferHandle Control transfer handle that is returned by bus event callback function.
data Pointer to buffer that holds data.
length Size in bytes.
Returns
USB_DEVICE_CONTROL_TRANSFER_RESULT_FAILED - If control transfer is failed due to host aborting the previous control
transfer.
USB_DEVICE_CONTROL_TRANSFER_RESULT_SUCCESS - Control endpoint is successfully armed with data buffer.
Example
5.9.3.6.2.3 USB_DEVICE_ControlSend Function
C
USB_DEVICE_CONTROL_TRANSFER_RESULT USB_DEVICE_ControlSend(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_DEVICE_CONTROL_TRANSFER_HANDLE controlXferHandle,
void * data,
size_t length
);
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
controlXferHandle Control transfer handle that is returned by the in bus event callback function.
data Pointer to buffer that holds data.
length Size in bytes.
Returns
USB_DEVICE_CONTROL_TRANSFER_RESULT_FAILED - If control transfer is failed due to host aborting the previous control
transfer.
USB_DEVICE_CONTROL_TRANSFER_RESULT_SUCCESS - Control endpoint is successfully armed with data buffer.
Example
5.9.3.6.2.4 USB_DEVICE_Attach Function
C
void USB_DEVICE_Attach(
USB_DEVICE_HANDLE usbDeviceHandle
);
Description
This function will attach the device to the USB. It does this by enabling the pull up resistors on the D+ or D- lines. This function
should be called when the USB device layer is ready to receive communication from the host (typically after all initialization is
complete).
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Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle Client's USB device layer handle (returned from USB_DEVICE_Open)
Returns
None.
Remarks
None.
Example
USB_DEVICE_INIT deviceLayerInit;
SYS_MODULE_OBJ usbDeviceObj;
USB_DEVICE_HANDLE usbDeviceHandle;
// System module initialization
deviceLayerInit.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
// Identifies peripheral (PLIB-level) ID
deviceLayerInit.usbID = USB_ID_1;
// Boolean flag: true -> Stop USB module in Idle Mode
deviceLayerInit.stopInIdle = false;
// Boolean flag: true -> Suspend USB in Sleep Mode
deviceLayerInit.suspendInSleep = false;
// Interrupt Source for USB module
deviceLayerInit.interruptSource = INT_SOURCE_USB_1;
// Number of function drivers registered to this instance of the
USB device layer
deviceLayerInit.registeredFuncCount = 1;
// Function driver table registered to this instance of the USB device layer
deviceLayerInit.registeredFunctions = funcRegistrationTable;
// Pointer to USB Descriptor structure
deviceLayerInit.usbMasterDescriptor = &usbMasterDescriptor;
// USB device initialization
usbDeviceObj = USB_DEVICE_Initialize(USB_DEVICE_INDEX_0, &deviceLayerInit);
if (SYS_MODULE_OBJ_INVALID == usbDeviceObj)
{
// Handle error
}
// Get an handle to the USB device layer.
usbDeviceHandle = USB_DEVICE_Open( USB_DEVICE_INDEX_0,
DRV_IO_INTENT_BLOCKING );
if(USB_DEVICE_HANDLE_INVALID == usbDeviceHandle)
{
// Failed to open handle.
// Handle error.
}
// Now, connect device to USB
USB_DEVICE_Attach(usbDeviceHandle);
5.9.3.6.2.5 USB_DEVICE_Detach Function
C
void USB_DEVICE_Detach(
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USB_DEVICE_HANDLE usbDeviceHandle
);
Description
This function will detach the device from the USB. It does this by disabling the pull up resistors on the D+ or D- lines. This
function should be called when the application wants to disconnect the device from the bus (typically to implement a soft detach
or switch to host mode operation).
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle Client's driver handle (returned from USB_DEVICE_Open)
Returns
None.
Remarks
None.
Example
USB_DEVICE_HANDLE usbDeviceHandle;
// Detach the device from the USB
USB_DEVICE_Detach( usbDeviceHandle );
5.9.3.6.2.6 USB_DEVICE_Status Function
C
SYS_STATUS USB_DEVICE_Status(
SYS_MODULE_OBJ object
);
Description
This function provides the current status of the USB device layer.
Preconditions
The USB_DEVICE_Initialize function must have been called before calling this function.
Parameters
Parameters Description
object Driver object handle, returned from USB_DEVICE_Initialize
Returns
SYS_STATUS_READY - Indicates that the device is busy with a previous system level operation and cannot start another
Remarks
Any value greater than SYS_STATUS_READY is also a normal running state in which the device is ready to accept new
operations.
SYS_STATUS_BUSY - Indicates that the device is busy with a previous system level operation and cannot start another
SYS_STATUS_UNINITIALIZED - Indicates that the device has never been initialized
SYS_STATUS_ERROR - Indicates that the device is in an error state
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Any value less than SYS_STATUS_ERROR is also an error state.
None.
Example
SYS_MODULE_OBJ object; // Returned from DRV_USB_Initialize
SYS_STATUS status;
status = USB_DEVICE_Status(object);
if (SYS_STATUS_ERROR >= status)
{
// Handle error
}
5.9.3.6.2.7 USB_DEVICE_ClientStatus Function
C
DRV_CLIENT_STATUS USB_DEVICE_ClientStatus(
USB_DEVICE_HANDLE usbDevHandle
);
Description
This function gets the client-specfic status of the USB device layer associated with the specified handle.
Preconditions
The USB_DEVICE_Initialize function must have been called. USB_DEVICE_Open must have been called to obtain a valid
opened device handle.
Parameters
Parameters Description
handle A valid open instance handle, returned from USB_DEVICE_Open
Returns
A value of enum type DRV_CLIENT_STATUS describing the current status of the USB device layer.
Remarks
None.
Example
5.9.3.6.2.8 USB_DEVICE_ResumeStart Function
C
void USB_DEVICE_ResumeStart(
USB_DEVICE_HANDLE usbDeviceHandle
);
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle Client's driver handle (returned from USB_DEVICE_Open)
Returns
None.
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Remarks
None.
Example
5.9.3.6.2.9 USB_DEVICE_ResumeStop Function
C
void USB_DEVICE_ResumeStop(
USB_DEVICE_HANDLE usbDeviceHandle
);
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle Client's driver handle (returned from USB_DEVICE_Open)
Returns
None.
Remarks
None.
Example
5.9.3.6.2.10 USB_DEVICE_GetDeviceSpeed Function
C
USB_SPEED USB_DEVICE_GetDeviceSpeed(
USB_DEVICE_HANDLE usbDeviceHandle
);
Description
The USB device stack supports both high speed and full speed operations. This function returns the current operation speed of
the USB bus.
Preconditions
The USB device layer must have been initialized and a valid handle to USB device layer must have been opened.
Parameters
Parameters Description
usbDeviceHandle Pointer to device layer handle that is returned from USB_DEVICE_Open
Returns
USB_SPEED_LOW - USB module is at low speed
USB_SPEED_FULL - USB module is at full speed
USB_SPEED_HIGH - USB module is at high speed
Remarks
This function must be called only after the device layer is initialized and opened by calling USB_DEVICE_Initialize and
USB_DEVICE_Open.
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Example
5.9.3.6.2.11 USB_DEVICE_GetDeviceState Function
C
USB_DEVICE_STATE USB_DEVICE_GetDeviceState(
USB_DEVICE_HANDLE usbDeviceHandle
);
Description
This function returns the current state of the USB device, as described in Chapter 9 of USB 2.0 Specification.
Preconditions
The USB device layer must have been initialized and opened before calling this function.
Parameters
Parameters Description
usbDeviceHandle Pointer to the device layer handle that is returned from USB_DEVICE_Open
Returns
USB_DEVICE_STATE_DETACHED - Device is not in any of the known states
USB_DEVICE_STATE_ATTACHED - Device is attached to the USB, but is not powered
USB_DEVICE_STATE_POWERED - Device is attached to the USB and powered, but has not been reset
USB_DEVICE_STATE_DEFAULT - Device is attached to the USB and powered and has been reset, but has not been assigned
a unique address
USB_DEVICE_STATE_ADDRESS - Device is attached to the USB, powered, has been reset, and a unique device address has
been assigned
USB_DEVICE_STATE_CONFIGURED - Device is attached to the USB, powered, has been reset, has a unique address, is
configured, and is not suspended
USB_DEVICE_STATE_SUSPENDED - Device is, at minimum, attached to the USB and is powered and has not seen bus
activity for 3 ms. The device is still in addresed state.
Remarks
This function must be called only after the device layer is initialized and opened by calling USB_DEVICE_Initialize and
USB_DEVICE_Open.
Example
USB_DEVICE_STATE usbDevState;
// Get USB Device State.
usbDevState = USB_DEVICE_GetDeviceState( usbDeviceHandle );
switch(usbDevState)
{
case USB_DEVICE_STATE_ATTACHED:
// Add code here
break;
case USB_DEVICE_STATE_POWERED:
// Add code here
break;
default:
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break;
}
5.9.3.6.2.12 USB_DEVICE_GetConfigurationValue Function
C
uint8_t USB_DEVICE_GetConfigurationValue(
USB_DEVICE_HANDLE usbDeviceHandle
);
Description
This function returns the current active USB device configuration.
Preconditions
The USB Device Layer must have been initialized and opened before calling this function.
Parameters
Parameters Description
usbDeviceHandle Pointer to the Device Layer Handle that is returned from USB_DEVICE_Open
Returns
Present active configuration.
Remarks
This function must be called only after the device layer is initialized and opened by calling USB_DEVICE_Initialize and
USB_DEVICE_Open.
Example
5.9.3.6.2.13 USB_DEVICE_RemoteWakeupIsEnabled Function
C
USB_DEVICE_REMOTE_WAKEUP_STATUS USB_DEVICE_RemoteWakeupIsEnabled(
USB_DEVICE_HANDLE usbDeviceHandle
);
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
Returns
USB_DEVICE_REMOTE_WAKEUP_ENABLED - Remote wakeup is enabled. USB_DEVICE_REMOTE_WAKEUP_DISABLED -
Remote wakeup is disabled.
Example
5.9.3.6.2.14 USB_DEVICE_PowerStateSet Function
C
void USB_DEVICE_PowerStateSet(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_DEVICE_POWER_STATE powerState
);
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Description
Application clients can use this function to set the power state of the device. A USB device can be bus powered ot self powered.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
powerState USB_DEVICE_POWER_STATE_BUS_POWERED/
USB_DEVICE_POWER_STATE_SELF_POWERED
Returns
None.
Example
5.9.3.6.3 Driver Interaction Functions
5.9.3.6.3.1 USB_DEVICE_ControlStatus Function
C
USB_DEVICE_CONTROL_TRANSFER_RESULT USB_DEVICE_ControlStatus(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_DEVICE_CONTROL_TRANSFER_HANDLE controlTransferHandle,
USB_DEVICE_CONTROL_STATUS status
);
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
controlTransferHandle Control transfer handle that is returned by bus event callback function.
status USB_DEVICE_CONTROL_STATUS_SEND_ZLP/
USB_DEVICE_CONTROL_STATUS_STALL
Returns
USB_DEVICE_CONTROL_TRANSFER_RESULT_FAILED - If control transfer is failed due to host aborting the previous control
transfer.
USB_DEVICE_CONTROL_TRANSFER_RESULT_SUCCESS - Control endpoint is successfully armed with data buffer.
Example
5.9.3.6.3.2 USB_DEVICE_EndpointEnable Function
C
USB_ERROR USB_DEVICE_EndpointEnable(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_ENDPOINT endpointAndDirection,
USB_TRANSFER_TYPE transferType,
uint16_t endpointSize
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);
Description
This function enables a endpoint for the specified direction and endpoint size. The function will enable the endpoint for
communication in one direction at a time. It must be called twice if the endpoint is required to communicate in both the directions,
except for control endpoints. If the endpoint type is a control endpoint, the endpoint is always bi-directional and the function
needs to be called only once. The size of the endpoint must match the wMaxPacketSize reported in the endpoint descriptor for
this endpoint. The function does not check if the endpoint is already in use. It is the client's responsibility to make sure that a
endpoint is not accidently re-used.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
endpointAndDirection Specifies the endpoint and direction.
transferType Should be USB_TRANSFER_TYPE_CONTROL for control endpoint,
USB_TRANSFER_TYPE_BULK for bulk endpoint,
USB_TRANSFER_TYPE_INTERRUPT for interrupt endpoint and
USB_TRANSFER_TYPE_ISOCHRONOUS for isochronous endpoint.
endpointSize Maximum size (in bytes) of the endpoint as reported in the endpoint descriptor.
Returns
USB_ERROR_NONE - The endpoint was successfully enabled. USB_ERROR_DEVICE_ENDPOINT_INVALID - If the endpoint
that is being accessed is is out of the valid endpoint defined for this driver instance.
Remarks
None.
Example
// This code snippet shows an example of how to enable endpoint
// 0 for control transfers. Note that for a control endpoint, the
// direction parameter is ignored. A control endpoint is always
// bi-directional. Endpoint sizeis 64 bytes.
USB_ENDPOINT ep;
handle = USB_DEVICE_Open(USB_DEVICE_INDEX_0);
ep.endpoint = 0;
ep.direction = USB_DATA_DIRECTION_DEVICE_TO_HOST;
USB_DEVICE_EndpointEnable(handle, ep, USB_TRANSFER_TYPE_CONTROL, 64);
// This code snippet shows an example of how to set up a endpoint
// for BULK IN transfer. For an IN transfer, data moves from device
// to host. In this example, endpoint 1 is enabled. The maximum
// packet size is 64.
USB_ENDPOINT ep;
ep.endpoint = 1;
ep.direction = USB_DATA_DIRECTION_DEVICE_TO_HOST;
USB_DEVICE_EndpointEnable(handle, ep, USB_TRANSFER_TYPE_BULK, 64);
// If endpoint 1 must also be set up for BULK OUT, then the enable
// function must be called again, as shown here.
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ep.endpoint = 1;
ep.direction = USB_DATA_DIRECTION_HOST_TO_DEVICE;
USB_DEVICE_EndpointEnable(handle, ep, USB_TRANSFER_TYPE_BULK, 64);
5.9.3.6.3.3 USB_DEVICE_EndpointIsEnabled Function
C
bool USB_DEVICE_EndpointIsEnabled(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_ENDPOINT endpointAndDirection
);
Description
This function returns the enable/ disable status of the specified endpoint and direction.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
endpointAndDirection Specifies the endpoint and direction.
Returns
Returns true if the endpoint is enabled, false otherwise.
Remarks
This function must not be called by the application clients. Application has no access to read the endpoint features.
Example
// This code snippet shows an example of how the
// USB_DEVICE_EndpointIsEnabled() function can be used to obtain the
// status of the endpoint 1 and IN direction.
USB_ENDPOINT ep;
ep.endpoint = 1;
ep.direction = USB_DATA_DIRECTION_DEVICE_TO_HOST;
if(DRV_USB_ENDPOINT_STATE_DISABLED ==
USB_DEVICE_EndpointIsEnabled(handle, ep))
{
// Endpoint is disabled. Enaable endpoint.
USB_DEVICE_EndpointEnable(handle, ep, USB_ENDPOINT_TYPE_BULK, 64);
}
5.9.3.6.3.4 USB_DEVICE_EndpointIsStalled Function
C
bool USB_DEVICE_EndpointIsStalled(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_ENDPOINT endpoint
);
Description
This function returns the stall status of the specified endpoint and direction.
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Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
endpointAndDirection Specifies the endpoint and direction.
Returns
Returns true if endpoint is stalled, false otherwise.
Remarks
This function must not be called by the application clients. Application has no access to read the endpoint features.
Example
// This code snippet shows an example of how the
// USB_DEVICE_EndpointIsStalled() function can be used to obtain the
// stall status of the endpoint 1 and IN direction.
USB_ENDPOINT ep;
ep.endpoint = 1;
ep.direction = USB_DATA_DIRECTION_DEVICE_TO_HOST;
if(true == USB_DEVICE_EndpointIsStalled (handle, ep))
{
// Endpoint stall is enabled. Clear the stall.
USB_DEVICE_EndpointStallClear(handle, ep);
}
5.9.3.6.3.5 USB_DEVICE_EndpointStall Function
C
USB_ERROR USB_DEVICE_EndpointStall(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_ENDPOINT endpointAndDirection
);
Description
This function stalls an endpoint in the specified direction.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
endpointAndDirection Specifies the endpoint and direction.
Returns
USB_ERROR_NONE - The endpoint was successfully enabled. USB_ERROR_DEVICE_ENDPOINT_INVALID - If the endpoint
that is being accessed is is out of the valid endpoint defined for this driver instance.
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Remarks
This function must not be called by the application clients. Application has no access to modify the endpoint features.
Example
// This code snippet shows an example of how to stall an endpoint. In
// this case , endpoint 1 IN direction is stalled.
USB_ENDPOINT ep;
ep.endpoint = 1;
ep.direction = USB_DATA_DIRECTION_DEVICE_TO_HOST;
USB_DEVICE_EndpointStall(handle, ep);
5.9.3.6.3.6 USB_DEVICE_EndpointStallClear Function
C
USB_ERROR USB_DEVICE_EndpointStallClear(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_ENDPOINT endpointAndDirection
);
Description
This function clears the stall on an endpoint in the specified direction.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
endpointAndDirection Specifies the endpoint and direction.
Returns
USB_ERROR_NONE - The endpoint was successfully enabled. USB_ERROR_DEVICE_ENDPOINT_INVALID - If the endpoint
that is being accessed is is out of the valid endpoint defined for this driver instance.
Remarks
This function must not be called by the application clients. Application has no access to modify the endpoint features.
Example
// This code snippet shows an example of how to clear a stall. In this
// example. the stall on endpoint 1 IN direction is cleared.
USB_ENDPOINT ep;
ep.endpoint = 1;
ep.direction = USB_DATA_DIRECTION_DEVICE_TO_HOST;
USB_DEVICE_EndpointStallClear(handle, ep);
5.9.3.6.3.7 USB_DEVICE_IRPCancelAll Function
C
USB_ERROR USB_DEVICE_IRPCancelAll(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_ENDPOINT endpointAndDirection
);
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Description
This function cancels all IRPs that are queued and in progress at the specified endpoint. The driver checks if IRPs are to be
cancelled at two instances; when it has called the IRP callback and is ready to proccess the next IRP in the queue and when it is
ready to process the next transaction in the the current IRP. It is recommended that this function be called in the IRP callback of
the IRP that just completed as this ensures that an IRP in progress is not cancelled. Cancelling an IRP that is progress may
cause disturbance to the USB host firmware. Cancelling the IRP from any other location, other than a IRP callback could cause
an IRP that is in progress to get cancelled.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
endpointAndDirection Specifies the endpoint and direction.
Returns
USB_ERROR_NONE - The endpoint was successfully enabled. USB_ERROR_DEVICE_ENDPOINT_INVALID - If the endpoint
that is being accessed is is out of the valid endpoint defined for this driver instance.
Remarks
This function must not be called by the application clients. Application has no access modify the IRPs.
Example
// This code snippet shows an exampl of how to cancel all IRPs.
void MyIRPCallback(USB_DEVICE_IRP * irp)
{
// Check if this is setup command
if(irp->status == USB_DEVICE_IRP_STATUS_SETUP)
{
if(IsSetupCommandSupported(irp->data) == false)
{
// This means that this setup command is not
// supported. Stall the endpoint.
USB_DEVICE_IRPCancelAll(handle, ep);
USB_DEVICE_EndpointStall(handle, ep);
}
}
}
5.9.3.6.3.8 USB_DEVICE_IRPSubmit Function
C
USB_ERROR USB_DEVICE_IRPSubmit(
USB_DEVICE_HANDLE usbDeviceHandle,
USB_ENDPOINT endpointAndDirection,
USB_DEVICE_IRP * irp
);
Description
This function submits a I/O Request Packet (IRP) for processing to the USB Driver. The IRP allows a client to send and receive
data from the USB Host. The data will sent or received through the specified endpoint. The direction of the data transfer is
indicated by the direction flag in the endpointAndDirection structure. Submitting an IRP arms the endpoint to either send data to
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or receive data from the host. If an IRP is under progress on the endpoint, then the subsequent IRP submit operation will result
in the IRPs getting queued. The contents of the IRP should not be changed till the IRP has been processed.
Particular attention should be paid to the size parameter of IRP. The following should be noted:
• The size parameter while sending data to the host can be less than, greater than, equal to or be an exact multiple of
maximum packet size for the endpoint. The maximum packet size for the endpoint determines the number of transactions
required to process the IRP.
• If the size parameter while sending data to the host is less than maximum packet size, the transfer will complete in one
transaction.
• If the size parameter while sending data to the host is greater than maximum packet size, the IRP will be processed in
mulitple transactions.
• If the size parameter while sending data to the host is equal to or an exact multiple of the maximum packet size, the client can
optionally ask the driver to send a Zero Length packet by specifying the USB_DEVICE_IRP_FLAG_SEND_ZLP flag as the
flag parameter.
• The size parameter while receiving data from the host must be an exact multiple of the maximum packet size of the endpoint.
If this is not the case, the driver will return a USB_DEVICE_IRP_SUBMIT_RESULT_INVALID_SIZE result. If while processing
the IRP, the driver receives less than maximum packet size or a ZLP from the host, the driver considers the IRP as
processed. The size paramter at this point contains the actual amount of data received from the host.
Preconditions
Client handle should be valid.
Parameters
Parameters Description
usbDeviceHandle USB device handle returned by USB_DEVICE_Open().
endpointAndDirection Specifies the endpoint and direction.
irp Pointer to the USB_DEVICE_IRP structure.
Returns
USB_ERROR_NONE - if the IRP was submitted successful. USB_ERROR_IRP_SIZE_INVALID - if the size parameter of the
IRP is not correct. USB_ERROR_IRP_QUEUE_FULL - if the driver IRP queue is full.
Remarks
This function must not be called by the application clients. Application must not submit IRP directly.
Example
// The following code snippet shows an example of how to schedule a
// IRP to send data from device to host. Assume that max packet size
// is 64 and endpoint is 1.
USB_ENDPOINT ep;
USB_DEVICE_IRP irp;
ep.direction = USB_DATA_DIRECTION_DEVICE_TO_HOST;
ep.endpoint = 1;
irp.data = myDataBufferToSend;
irp.size = 130;
irp.flags = USB_DEVICE_IRP_FLAG_NONE;
irp.callback = MyIRPCompletionCallback;
irp.referenceData = (uintptr_t)&myDeviceLayerObj;
if (USB_DEVICE_IRPSubmit(handle, ep, irp)
!= USB_ERROR_NONE)
{
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// This means there was an error.
}
else
{
// The status of the IRP can be checked.
while(irp.status != USB_DEVICE_IRP_STATUS_COMPLETED)
{
// Wait or run a task routine.
}
}
// The following code snippet shows how the client can request
// the driver to send a ZLP when the size is an exact multiple of
// end point size.
irp.data = myDataBufferToSend;
irp.size = 128;
irp.flags = USB_DEVICE_IRP_FLAG_SEND_ZLP;
irp.callback = MyIRPCompletionCallback;
irp.referenceData = (uintptr_t)&myDeviceLayerObj;
// Note that while receiving data from the host, the size should
// be an exact multiple maximum packet size of the endpoint. In the
// example below, the USB_DEVICE_IRPSubmit() function will
// return a USB_DEVICE_IRP_SUBMIT_RESULT_INVALID_SIZE value.
ep.direction = USB_DATA_DIRECTION_HOST_TO_DEVICE;
ep.endpoint = 1;
irp.data = myDataBufferToSend;
irp.size = 60; // THIS SIZE IS NOT CORRECT
irp.flags = USB_DEVICE_IRP_FLAG_NONE;
irp.callback = MyIRPCompletionCallback;
irp.referenceData = (uintptr_t)&myDeviceLayerObj;
5.9.3.6.4 Data Types and Constants
5.9.3.6.4.1 USB_DEVICE_INDEX_0 Macro
C
#define USB_DEVICE_INDEX_0 0
Description
USB Device Layer Index Numbers
These constants provide USB device layer index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals.
These values should be passed into the USB_DEVICE_Initialize and USB_DEVICE_Open routines to identify the device layer
instance in use.
5.9.3.6.4.2 USB_DEVICE_INDEX_1 Macro
C
#define USB_DEVICE_INDEX_1 1
Description
This is macro USB_DEVICE_INDEX_1.
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5.9.3.6.4.3 USB_DEVICE_INDEX_2 Macro
C
#define USB_DEVICE_INDEX_2 2
Description
This is macro USB_DEVICE_INDEX_2.
5.9.3.6.4.4 USB_DEVICE_INDEX_3 Macro
C
#define USB_DEVICE_INDEX_3 3
Description
This is macro USB_DEVICE_INDEX_3.
5.9.3.6.4.5 USB_DEVICE_INDEX_4 Macro
C
#define USB_DEVICE_INDEX_4 4
Description
This is macro USB_DEVICE_INDEX_4.
5.9.3.6.4.6 USB_DEVICE_INDEX_5 Macro
C
#define USB_DEVICE_INDEX_5 5
Description
This is macro USB_DEVICE_INDEX_5.
5.9.3.6.4.7 USB_DEVICE_INDEX_COUNT Macro
C
#define USB_DEVICE_INDEX_COUNT _USB_DEVICE_EXISTS
Description
USB Device Layer Module Index Count
This constant identifies number of valid USB device layer indices.
Remarks
This constant should be used in place of hard-coded numeric literals.
This value is derived from part-specific header files defined as part of the peripheral libraries.
5.9.3.6.4.8 USB_DEVICE_CALLBACK Type
C
typedef void (* USB_DEVICE_CALLBACK)(USB_DEVICE_EVENT event, USB_DEVICE_EVENT_DATA *
eventData);
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Description
USB Device Layer Callback Function Pointer
This is the data type of the callback function that will be called by the USB device layer when there is a bus event from USB
device layer.
Remarks
A USB Device Layer callback function must have the following function signature:
void MyCallBack ( USB_DEVICE_EVENT event, USB_DEVICE_EVENT_DATA * eventData );
Where, "event" indicates an event on the USB device layer, and "MyCallBack" can be any name desired as the function is called
through the pointer.
5.9.3.6.4.9 USB_DEVICE_CONFIG_DESCS_PTR Type
C
typedef uint8_t** USB_DEVICE_CONFIG_DESCS_PTR;
Description
Configuration descriptors pointer
5.9.3.6.4.10 USB_DEVICE_CONTROL_STATUS Enumeration
C
typedef enum {
USB_DEVICE_CONTROL_STATUS_OK,
USB_DEVICE_CONTROL_STATUS_ERROR
} USB_DEVICE_CONTROL_STATUS;
Description
Control transfer status stage
Members
Members Description
USB_DEVICE_CONTROL_STATUS_OK Control transfer is supported. Send ZLP in the status stage.
USB_DEVICE_CONTROL_STATUS_ERROR Control transfer is not supported. Stall control endpoint.
Remarks
Also see, USB_DEVICE_ControlStatus
5.9.3.6.4.11 USB_DEVICE_CONTROL_TRANSFER_CALLBACK Type
C
typedef void (* USB_DEVICE_CONTROL_TRANSFER_CALLBACK)(USB_DEVICE_CONTROL_TRANSFER_HANDLE
handle, USB_DEVICE_CONTROL_TRANSFER_EVENT event, USB_DEVICE_CONTROL_TRANSFER_EVENT_DATA *
eventData);
Description
USB Device Layer control transfer callback Function Pointer
This is the data type of the callback function that will be called by the USB device layer when there is a control transfer event
from USB device layer.
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Remarks
A USB Device Layer callback function must have the following function signature:
void MyCallBack ( USB_DEVICE_EVENT event, USB_DEVICE );
Where, "event" indicates an event on the USB device layer, and "MyCallBack" can be any name desired as the function is called
through the pointer.
5.9.3.6.4.12 USB_DEVICE_CONTROL_TRANSFER_EVENT Enumeration
C
typedef enum {
USB_DEVICE_CONTROL_TRANSFER_ABORTED,
USB_DEVICE_CONTROL_DATA_RECEIVED,
USB_DEVICE_CONTROL_SETUP_REQUEST,
USB_DEVICE_CONTROL_DATA_SENT = 3
} USB_DEVICE_CONTROL_TRANSFER_EVENT;
Description
USB Device control transfer events
Members
Members Description
USB_DEVICE_CONTROL_TRANSFER_ABORTED Previous control transfer was aborted.
USB_DEVICE_CONTROL_DATA_RECEIVED Control transfer data stage was completed
USB_DEVICE_CONTROL_SETUP_REQUEST A setup packet was received and control transfer is in setup stage
USB_DEVICE_CONTROL_DATA_SENT = 3 Control transfer data stage transmit is complete
Remarks
None.
5.9.3.6.4.13 USB_DEVICE_CONTROL_TRANSFER_EVENT_DATA Union
C
typedef union {
USB_SETUP_PACKET * setupRequest;
} USB_DEVICE_CONTROL_TRANSFER_EVENT_DATA;
Description
USB Device control transfer event data.
Members
Members Description
USB_SETUP_PACKET * setupRequest; Data associated with USB_DEVICE_CONTROL_SETUP_REQUEST
Remarks
None.
5.9.3.6.4.14 USB_DEVICE_CONTROL_TRANSFER_HANDLE Type
C
typedef uintptr_t USB_DEVICE_CONTROL_TRANSFER_HANDLE;
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Description
Data type of control transfer handle.
This is the data type of the handle that must be used by the application client for all control transfers.
Remarks
Also see, USB_DEVICE_ControlSend USB_DEVICE_ControlReceive USB_DEVICE_ControlStatus
5.9.3.6.4.15 USB_DEVICE_CONTROL_TRANSFER_RESULT Enumeration
C
typedef enum {
USB_DEVICE_CONTROL_TRANSFER_RESULT_FAILED,
USB_DEVICE_CONTROL_TRANSFER_RESULT_SUCCESS
} USB_DEVICE_CONTROL_TRANSFER_RESULT;
Description
These enumerated values are the possible return values for control transfer operation.
Members
Members Description
USB_DEVICE_CONTROL_TRANSFER_RESULT_FAILED Control transfer failed. This could be because the control
transfer handle is no more valid since the control transfer was
aborted by host by sending a new setup packet
USB_DEVICE_CONTROL_TRANSFER_RESULT_SUCCESS Control transfer was successful
Remarks
Also see, USB_DEVICE_ControlSend USB_DEVICE_ControlReceive USB_DEVICE_ControlStatus
5.9.3.6.4.16 USB_DEVICE_EVENT Enumeration
C
typedef enum {
USB_DEVICE_EVENT_RESET,
USB_DEVICE_EVENT_SUSPENDED,
USB_DEVICE_EVENT_RESUMED,
USB_DEVICE_EVENT_ERROR,
USB_DEVICE_EVENT_SOF,
USB_DEVICE_EVENT_DETACHED,
USB_DEVICE_EVENT_DECONFIGURED,
USB_DEVICE_EVENT_CONFIGURED,
USB_DEVICE_EVENT_ATTACHED
} USB_DEVICE_EVENT;
Description
Datatype that identifies the event that is active in the USB device layer.
Members
Members Description
USB_DEVICE_EVENT_RESET USB bus reset occurred. This event is an indication to the application client that
device layer is about to de-initialize the function drivers. For application client, this
event means that it has to close any open handles to function drivers
USB_DEVICE_EVENT_SUSPENDED This event is an indication to the application client that device is suspended and it
can put the device to power-down mode if required.
USB_DEVICE_EVENT_RESUMED This event indicates that device has resumed from suspended state.
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USB_DEVICE_EVENT_ERROR This event is an indication to the application client that an error occurred on the
USB bus
5.9.3.6.4.17 USB_DEVICE_EVENT_DATA Union
C
typedef union {
USB_DEVICE_EVENT_DATA_CONFIGURED eventConfigured;
} USB_DEVICE_EVENT_DATA;
Members
Members Description
USB_DEVICE_EVENT_DATA_CONFIGURED
eventConfigured;
Data related to configured event
Remarks
Also see USB_DEVICE_CALLBACK
5.9.3.6.4.18 USB_DEVICE_EVENT_DATA_CONFIGURED Structure
C
typedef struct {
uint8_t configurationValue;
USB_SPEED speed;
} USB_DEVICE_EVENT_DATA_CONFIGURED;
Members
Members Description
uint8_t configurationValue; Configuration value selected by the host
USB_SPEED speed; USB speed at which the device is connected to host
Remarks
Also see USB_DEVICE_EVENT_DATA USB_DEVICE_CALLBACK
5.9.3.6.4.19 USB_DEVICE_FUNC_REGISTRATION_TABLE Structure
C
typedef struct {
USB_SPEED speed;
uint8_t configurationValue;
uint8_t interfaceNumber;
uint8_t numberOfInterfaces;
SYS_MODULE_INDEX funcDriverIndex;
void* funcDriverInit;
USB_DEVICE_FUNCTION_DRIVER* driver;
} USB_DEVICE_FUNC_REGISTRATION_TABLE;
Description
Global USB Device function registration structure
Members
Members Description
USB_SPEED speed; Type of speed (high, full or low speed)
uint8_t configurationValue; Configuration Value to which the function driver has to be tied
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uint8_t interfaceNumber; Interface number to which this function driver has to be tied
uint8_t numberOfInterfaces; Number of interfaces used by the function
SYS_MODULE_INDEX funcDriverIndex; Function driver instance index
void* funcDriverInit; Pointer to a structure that contains function driver initialization data
USB_DEVICE_FUNCTION_DRIVER*
driver;
Pinter to a standard structure that exposes function driver APIs to USB device
layer
5.9.3.6.4.20 USB_DEVICE_FUNCTION_DRIVER Structure
C
typedef struct {
void (* initializeByDescriptor)(SYS_MODULE_INDEX funcDriverIndex, USB_DEVICE_HANDLE
usbDeviceHandle, void* funcDriverInit, uint8_t interfaceNumber, uint8_t alternateSetting,
uint8_t descriptorType, uint8_t * pDescriptor);
void (* deInitialize)(SYS_MODULE_INDEX funcDriverIndex);
void (* controlTransferNotification)(USB_DEVICE_CONTROL_TRANSFER_HANDLE controlHandle,
SYS_MODULE_INDEX index, USB_DEVICE_CONTROL_TRANSFER_EVENT controlEvent,
USB_DEVICE_CONTROL_TRANSFER_EVENT_DATA * controlEventData);
void (* tasks)(SYS_MODULE_INDEX funcDriverIndex);
} USB_DEVICE_FUNCTION_DRIVER;
Description
USB function driver structure
All function drivers (including vendor specific ones) must provide callback functions to USB device layer in the format specified
by this structure. The USB device layer calls these callback functions at the time of appropriate event.
Members
Members Description
void (* initializeByDescriptor)(SYS_MODULE_INDEX funcDriverIndex,
USB_DEVICE_HANDLE usbDeviceHandle, void* funcDriverInit, uint8_t
interfaceNumber, uint8_t alternateSetting, uint8_t descriptorType, uint8_t *
pDescriptor);
Initialize gets called by the Device layer when it
recieves set configuration event. The device
layer will initialize a function driver for every
descriptor. Based on the descriptor type the
function driver has to initialize itself.
void (* deInitialize)(SYS_MODULE_INDEX funcDriverIndex); deInit gets called when the device layer detects
a device dettach, change in configuration or ob
USB bus reset.
void (*
controlTransferNotification)(USB_DEVICE_CONTROL_TRANSFER_HANDLE
controlHandle, SYS_MODULE_INDEX index,
USB_DEVICE_CONTROL_TRANSFER_EVENT controlEvent,
USB_DEVICE_CONTROL_TRANSFER_EVENT_DATA * controlEventData);
This function will be called by the device layer
when there is a interface specific setup packet
request
void (* tasks)(SYS_MODULE_INDEX funcDriverIndex); Function driver Tasks
Remarks
Even the vendor specific function drivers must provide callback functions in this format.
5.9.3.6.4.21 USB_DEVICE_HANDLE Type
C
typedef uintptr_t USB_DEVICE_HANDLE;
Description
Data type for USB device handle.
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The data type of the handle that is returned from USB_DEVICE_Open function.
Remarks
None.
5.9.3.6.4.22 USB_DEVICE_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
unsigned int usbID;
bool stopInIdle;
bool suspendInSleep;
INT_SOURCE interruptSource;
void * endpointTable;
uint16_t registeredFuncCount;
USB_DEVICE_FUNC_REGISTRATION_TABLE * registeredFunctions;
USB_MASTER_DESCRIPTOR * usbMasterDescriptor;
USB_SPEED deviceSpeed;
} USB_DEVICE_INIT;
Description
USB Device Initialization Structure
Members
Members Description
SYS_MODULE_INIT moduleInit; System module initialization
unsigned int usbID; Identifies peripheral (PLIB-level) ID
bool stopInIdle; Boolean flag: true -> Stop USB module in Idle Mode
bool suspendInSleep; Boolean flag: true -> Suspend USB in Sleep Mode
INT_SOURCE interruptSource; Interrupt Source for USB module
void * endpointTable; Endpoint Table Buffer
uint16_t registeredFuncCount; Number of function drivers registered to this instance of the USB device layer
USB_DEVICE_FUNC_REGISTRATION_TABLE
* registeredFunctions;
Function driver table registered to this instance of the USB device layer
USB_MASTER_DESCRIPTOR *
usbMasterDescriptor;
Pointer to USB Descriptor structure
USB_SPEED deviceSpeed; Speed at which this device speed should operate
Remarks
Also see, USB_DEVICE_Initialization
5.9.3.6.4.23 USB_DEVICE_POWER_STATE Enumeration
C
typedef enum {
USB_DEVICE_POWER_STATE_BUS_POWERED,
USB_DEVICE_POWER_STATE_SELF_POWERED
} USB_DEVICE_POWER_STATE;
Description
Power state
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Members
Members Description
USB_DEVICE_POWER_STATE_BUS_POWERED Device is bus powered
USB_DEVICE_POWER_STATE_SELF_POWERED Device is self powered
Remarks
Also see, USB_DEVICE_PowerStateSet
5.9.3.6.4.24 USB_DEVICE_REMOTE_WAKEUP_STATUS Enumeration
C
typedef enum {
USB_DEVICE_REMOTE_WAKEUP_DISABLED,
USB_DEVICE_REMOTE_WAKEUP_ENABLED
} USB_DEVICE_REMOTE_WAKEUP_STATUS;
Description
Remote wakeup status
Members
Members Description
USB_DEVICE_REMOTE_WAKEUP_DISABLED Remote wakeup is disabled
USB_DEVICE_REMOTE_WAKEUP_ENABLED Remote wakeup is enabled
Remarks
Also see, USB_DEVICE_RemoteWakeupIsEnabled
5.9.3.6.4.25 USB_DEVICE_STATE Enumeration
C
typedef enum {
USB_DEVICE_STATE_DETACHED,
USB_DEVICE_STATE_ATTACHED,
USB_DEVICE_STATE_POWERED,
USB_DEVICE_STATE_DEFAULT,
USB_DEVICE_STATE_ADDRESSED,
USB_DEVICE_STATE_CONFIGURED,
USB_DEVICE_STATE_SUSPENDED
} USB_DEVICE_STATE;
Description
USB device states as described in chapter-9 of USB 2.0 specification
This data type identifies the USB Device States.
Members
Members Description
USB_DEVICE_STATE_DETACHED Device is not in any of the known USB states
USB_DEVICE_STATE_ATTACHED Device is in attached state
USB_DEVICE_STATE_POWERED Device is in powered state
USB_DEVICE_STATE_DEFAULT Device is in default state
USB_DEVICE_STATE_ADDRESSED Device is in addressed state
USB_DEVICE_STATE_CONFIGURED Device is in configured state
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USB_DEVICE_STATE_SUSPENDED Device is in suspended state
Remarks
The USB specification doesn't define the state of a device when it is detached from the USB. The
USB_DEVICE_STATE_DETACHED is not the standard state, but is required to indicate the user, that the device is not in any of
the known states.
5.9.3.6.4.26 USB_DEVICE_STRING_DESCS_PTR Type
C
typedef uint8_t** USB_DEVICE_STRING_DESCS_PTR;
Description
String descriptors pointer
5.9.3.6.4.27 USB_MASTER_DESCRIPTOR Structure
C
typedef struct {
uint8_t* ptrDeviceDescriptor;
uint8_t configDescriptorCount;
USB_DEVICE_CONFIG_DESCS_PTR ptrConfigDescriptor;
uint8_t* ptrHighSpeedDeviceDescriptor;
uint8_t highSpeedConfigDescriptorCount;
USB_DEVICE_CONFIG_DESCS_PTR ptrHighSpeedConfigDescriptor;
uint8_t stringDescCount;
USB_DEVICE_STRING_DESCS_PTR ptrStringDesc;
uint8_t* ptrFullSpeedDeviceQualifier;
uint8_t* ptrHighSpeedDeviceQualifier;
} USB_MASTER_DESCRIPTOR;
Description
Global USB Descriptor Structure.
Members
Members Description
uint8_t* ptrDeviceDescriptor; Pointer to standard device descriptor (for low/full speed)
uint8_t configDescriptorCount; Total number configurations available (for low/full speed)
USB_DEVICE_CONFIG_DESCS_PTR
ptrConfigDescriptor;
Pointer to array of configurations descriptor pointers (for low/full speed)
uint8_t* ptrHighSpeedDeviceDescriptor; Pointer to array of high speed standard Device descriptor. Assign this to NULL if
not supported.
uint8_t highSpeedConfigDescriptorCount; Total number of high speed configurations available. Set this to zero if not
supported
USB_DEVICE_CONFIG_DESCS_PTR
ptrHighSpeedConfigDescriptor;
Pointer to array of high speed configurations descriptor pointers. Set this to NULL
if not supported
uint8_t stringDescCount; Total number of string descriptors available (common to all speeds)
USB_DEVICE_STRING_DESCS_PTR
ptrStringDesc;
Pointer to array of string Descriptor pointers (common to all speeds)
uint8_t* ptrFullSpeedDeviceQualifier; Pointer to full speed device_qualifier descriptor. Device responds with this
descriptor when it is operating at high speed
uint8_t* ptrHighSpeedDeviceQualifier; Pointer to high speed device_qualifier descriptor. Device responds with this
descriptor when it is operating at full speed
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5.9.3.6.4.28 USB_DEVICE_ENDPOINT_TABLE_SIZE Macro
C
#define USB_DEVICE_ENDPOINT_TABLE_SIZE (DRV_USB_ENDPOINTS_NUMBER *
DRV_USB_ENDPOINT_TABLE_ENTRY_SIZE)
Description
This is macro USB_DEVICE_ENDPOINT_TABLE_SIZE.
5.9.3.6.4.29 USB_DEVICE_HANDLE_INVALID Macro
C
#define USB_DEVICE_HANDLE_INVALID ((USB_DEVICE_HANDLE)(-1))
Description
USB Device Layer invalid handle
5.9.3.7 Files
Files
Name Description
usb_device.h USB Device Layer Interface Header
usb_device_config_template.h USB device configuration template header file.
Description
5.9.3.7.1 usb_device.h
USB Device Layer Interface Definition
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
USB device layer.
Enumerations
Name Description
USB_DEVICE_CONTROL_STATUS This enumerated data-type identifies the status stage of control
transfer.
USB_DEVICE_CONTROL_TRANSFER_EVENT This datatype defines the different control transfer events.
USB_DEVICE_CONTROL_TRANSFER_RESULT Enumerated data type identifying results of a control transfer.
USB_DEVICE_EVENT Enumerated data-type identifying the bus events that has
occurred in the USB device layer.
USB_DEVICE_POWER_STATE Enumerated data type that identifies if the device is self
powered or bus powered .
USB_DEVICE_REMOTE_WAKEUP_STATUS Enumerated data type that identifies if the remote wakeup
status of the device.
USB_DEVICE_STATE Standard USB device states as described in Chapter-9 of USB
2.0 Specification.
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Functions
Name Description
USB_DEVICE_Attach This function will attach the device to the USB.
USB_DEVICE_ClientStatus Gets the current client-specific status of the USB device layer.
USB_DEVICE_Close Closes an opened handle to an instance of the USB device layer.
USB_DEVICE_ControlEventCallBackSet Client can register its call-back function into the device layer to get
control transfer events.
USB_DEVICE_ControlReceive Receives data stage of the control transfer from host to device.
USB_DEVICE_ControlSend Sends data stage of the control transfer from device to host.
USB_DEVICE_ControlStatus Initiates status stage of the control transfer.
USB_DEVICE_Deinitialize Deinitializes the specified instance of the USB device layer.
USB_DEVICE_Detach This function will detach the device from the USB.
USB_DEVICE_EndpointDisable This function disables an endpoint.
USB_DEVICE_EndpointEnable This function enables a endpoint for the specified direction and endpoint
size.
USB_DEVICE_EndpointIsEnabled This function returns the enable/ disable status of the specified endpoint
and direction.
USB_DEVICE_EndpointIsStalled This function returns the stall status of the specified endpoint and
direction.
USB_DEVICE_EndpointStall This function stalls an endpoint in the specified direction.
USB_DEVICE_EndpointStallClear This function clears the stall on an endpoint in the specified direction.
USB_DEVICE_EventCallBackSet Client can register its call-back function into the device layer.
USB_DEVICE_GetConfigurationValue Informs the client of the current USB device configuration set by the
USB host.
USB_DEVICE_GetDeviceSpeed Informs the client of the current operation speed of the USB bus.
USB_DEVICE_GetDeviceState Returns the current state of the USB device.
USB_DEVICE_Initialize Creates and initializes an instance of the USB device layer.
USB_DEVICE_IRPCancelAll This function cancels all IRPs that are queued and in progress at the
specified endpoint.
USB_DEVICE_IRPSubmit This function submits a I/O Request Packet (IRP) for processing to the
USB Driver.
USB_DEVICE_Open Opens the specified USB device layer instance and returns a handle to
it.
USB_DEVICE_PowerStateSet Sets power state of the device.
USB_DEVICE_Reinitialize Reinitializes the USB device layer
USB_DEVICE_RemoteWakeupIsEnabled Gets the "Remote wakeup" status of the device.
USB_DEVICE_ResumeStart This function will start the resume signalling.
USB_DEVICE_ResumeStop This function will stop the resume signalling.
USB_DEVICE_Status Provides the current status of the USB device layer
USB_DEVICE_Tasks USB Device layer calls all other function driver tasks in this function. It
also generates and forwards events to its clients.
Macros
Name Description
USB_DEVICE_ENDPOINT_TABLE_SIZE This is macro USB_DEVICE_ENDPOINT_TABLE_SIZE.
USB_DEVICE_HANDLE_INVALID Macro that defines the value of invalid device handle.
USB_DEVICE_INDEX_0 USB device layer index definitions.
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USB_DEVICE_INDEX_1 This is macro USB_DEVICE_INDEX_1.
USB_DEVICE_INDEX_2 This is macro USB_DEVICE_INDEX_2.
USB_DEVICE_INDEX_3 This is macro USB_DEVICE_INDEX_3.
USB_DEVICE_INDEX_4 This is macro USB_DEVICE_INDEX_4.
USB_DEVICE_INDEX_5 This is macro USB_DEVICE_INDEX_5.
USB_DEVICE_INDEX_COUNT Number of valid USB Device Layer indices
Structures
Name Description
USB_DEVICE_EVENT_DATA_CONFIGURED Data-type that holds the data related to USB device configured
event.
USB_DEVICE_FUNC_REGISTRATION_TABLE A function driver has to be registered with the USB device layer
using this structure.
USB_DEVICE_FUNCTION_DRIVER A function driver has to expose standard APIs to device layer
using following structure.
USB_DEVICE_INIT This structure has to be initialized by the system/application and
must be passed as parameter to USB_DEVICE_Initialize().
USB_MASTER_DESCRIPTOR Global USB descriptor structure containing pointers to standard
USB descriptor structures.
Types
Name Description
USB_DEVICE_CALLBACK Pointer to a USB Device Layer callback function data type
for bus events.
USB_DEVICE_CONFIG_DESCS_PTR Pointer to an array that contains pointer to configuration
descriptors.
USB_DEVICE_CONTROL_TRANSFER_CALLBACK
USB_DEVICE_CONTROL_TRANSFER_HANDLE Data type of USB device control transfer handle.
USB_DEVICE_HANDLE Data type for USB device handle.
USB_DEVICE_STRING_DESCS_PTR Pointer to an array that contains pointer to string descriptors.
Unions
Name Description
USB_DEVICE_CONTROL_TRANSFER_EVENT_DATA USB device control transfer event data.
USB_DEVICE_EVENT_DATA Data assosciated with USB bus events.
File Name
usb_device.h
Company
Microchip Technology Inc.
5.9.3.7.2 usb_device_config_template.h
USB Device Layer Compile Time Options
This file contains USB device layer compile time options (macros) that are to be configured by the user. This file is a template file
and must be used as an example only. This file must not be directly included in the project.
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Macros
Name Description
USB_DEVICE_MAX_CLIENTS Sets the maximum possible number of clients an instance of the USB
device can open using USB_DEVICE_Open.
USB_DEVICE_MAX_FUNCTION_DRIVER Sets the maximum number of function drivers at a time that are
supported by an instance of the USB device layer.
USB_DEVICE_MAX_INSTANCES Sets the maximum possible number of instances of the USB device
that can be instantiated by using USB_DEVICE_Initialize() routine.
File Name
usb_device_config_template.h
Company
Microchip Technology Inc.
5.9.4 USB Device CDC Library
5.9.4.1 Introduction
Introduces the MPLAB Harmony USB Device CDC Library
Description
The MPLAB Harmony USB Device CDC library provides a high-level abstraction of the Universal Serial Bus (USB)
Communications Device Class (CDC). This function driver is a part of the MPLAB Harmony USB Device stack. The library offers
a convenient C language interface and supports revision 1.2 of the USB CDC specification release.
The USB Communications Device Class (or USB CDC) is a composite Universal Serial Bus device class. The communications
device class is primarily used for
• Telecommunication Devices (analog modems, ISDN terminal adapters, digital telephones, and analog phones)
• Networking Devices (ADSL modems, cable modems and Ethernet cross-over cables.
USB CDC specification, and associated subclass specifications, do not attempt to redefine existing standards for connection and
control of communications services. The Communications Class defines mechanisms for a device and host to identify which
existing protocols to use. Where possible, existing data formats are used and the transport of these formats are merely enabled
by the USB through the definition of the appropriate descriptors, interfaces, and requests.
The MPLAB Harmony USB Device CDC library (also referred to as CDC function driver in this document) offers services to the
application to interact and respond to the host requests.
5.9.4.2 Release Notes
MPLAB Harmony Version: v0.70b USB Device CDC Library Version : 0.01 Alpha Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
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Known Issues:
Nothing to report in this release.
5.9.4.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.9.4.4 Library Architecture
5.9.4.4.1 Abstraction Model
Provides an Architectural Overview of the CDC Function Driver.
Description
The CDC Function Driver offers services to a USB CDC device to communicate with the host by abstracting the USB
specification details. It must be used along with the USB Device layer and USB controller to communicate with the USB host.
Figure 1 shows a block diagram representation of the MPLAB Harmony USB Architecture and where the USB CDC Function
Driver is placed.
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Figure 1: USB CDC Function Driver
The USB controller driver takes the responsibility of managing the USB peripheral on the device. The USB device layer handles
the device enumeration etc. The USB Device layer forwards all CDC specific control transfers to the CDC Function Driver. The
CDC Function Driver ACM sub-layer interprets the control transfers and requests application's intervention through event
handlers and well defined set of API. The application must register a event handler with the CDC function driver in the Device
Layer Set Configuration Event. While the application must respond to the CDC ACM events, it can do this either in the event
handler or out of it. The application interacts directly with the CDC Function Driver to send/receive data and to send serial state
notifications.
As per the CDC specification,a USB CDC device is a collection of following interfaces.
- Communication Interface (Device Management) on endpoint 0
- Communication Interface (Notification) on an interrupt endpoint. This is optional
- Data Interface (either a bulk or isochronous endpoint). This is optional.
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Figure 2: CDC Function Driver Architecture
Figure 2 shows the architecture of the CDC Function Driver. The device management on end point zero is handled by the device
library(class specific requests are routed to the CDC function driver by USB Device Layer). So an instance of CDC function
driver actually consists of a data interface and a notification interface. The library is implemented in two .c files. The
usb_device_cdc.c file implements the CDC data and serial state notification. The usb_device_cdc_acm.c file implements the
control transfer interpretation and and event generation.
5.9.4.4.2 Abstract Control Model (ACM)
Describes the various ACM commands supported by this CDC Function Driver Implementation
Description
One of the basic supported models for communication by CDC is POTS (Plain Old Telephone Service). The POTS model is for
devices that communicate via ordinary phone lines and generic COM port devices. The USB CDC specification refers to this
basic model as PSTN (Public Switched Telephone Network).
Depending on the amount of data processing the device is responsible for POTS/PSTN is divided into several models. The
processing of data can include modulation, demodulation, error correction and data compression.
Of the supported PSTN models, this CDC function driver implements Abstract Control Model (ACM). In the ACM the device
handles modulation, demodulation and handles V.25ter (AT) commands. This model (ACM) also supports requests and
notifications to get and set R-232 status, control and asynchronous port part parameters. Virtual COM port devices use Abstract
Control Model.
The following sections describe the management requests and notifications supported by the CDC ACM function driver.
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Management Requests:
The host requests/sends some information in the form of management requests on the bi-directional end-point 0. Table 1 shows
shows the CDC specification ACM sub class management requests and how these request are handled by the CDC Function
Driver.
Request Code Required/Optional Comments
SEND_ENCAPSULATED_COMMAND Required Implemented by CDC Function Driver ACM layer. This request is
stalled.
GET_ENCAPSULATED_RESPONSE Required Implemented by CDC Function Driver ACM layer. This request is
stalled.
SET_COMM_FEATURE Optional Not Implemented
GET_COMM_FEATURE Optional Not Implemented
CLEAR_COMM_FEATURE Optional Not Implemented
SET_LINE_CODING Optional Implemented by CDC Function Driver ACM layer. Requires
application response
GET_LINE_CODING Optional Implemented by CDC Function Driver ACM layer. Requires
application response
SET_CONTROL_LINE_STATE Optional Implemented by CDC Function Driver ACM layer. Requires
application response
SEND_BREAK Optional Implemented by CDC Function Driver ACM layer. Requires
application response
Table 1: CDC ACM management requests and CDC Function Driver support status.
5.9.4.5 Using the Library
5.9.4.5.1 Files to Include
Describes which files to include in project while using the CDC Function Driver
Description
Table 2 shows the files that must be included in the project in order to use the CDC Function Driver. These files are located in
the framework folder of the MPLAB Harmony installation. It is assumed that the Device Layer files ( and the files needed by the
Device Layer) are already included in the project.
Filename Description
\framework\usb\src\dynamic\usb_device_cdc.c Contains the CDC data and serial notification transfer functions
implementation.
\framework\usb\src\dynamic\usb_device_cdc_acm.c Implements the control transfer interpretation and and event generation of
CDC-ACM events.
\framework\usb\usb_device_cdc.h Must included in every source file that needs to invoke CDC function
driver API.
system_config.h User created file which contains the CDC function driver configuration.
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Table 2: Files to be included in USB CDC Device Project.
5.9.4.5.2 Library Configuration
Describes how to configure the CDC Function Driver
Description
The application designer must specify the following configuration parameters while using the CDC Function Driver. The
configuration macros that implement these parameters must be located in the system_config.h file in the application project and
a compiler include path (to point to the folder that contains this file) should be specified.
Configuration Macro Name Description Comments
USB_DEVICE_CDC_INSTANCES_NUMBER Number of
CDC
Function
Driver
Instances
in the
application
This macro defines the number of instances of the CDC Function
Driver. For example, if the application needs to implement two
instances of the CDC Function Driver (to create two COM ports)
on one USB Device, the macro should be set to 2. Note that
implementing a USB Device that features multiple CDC interfaces
requires appropriate USB configuration descriptors.
USB_DEVICE_CDC_QUEUE_SIZE CDC
Function
Driver
Buffer
Combined
Queue size
This macro defines the number of entries in all queues in all
instances of the CDC function driver. This value can be obtained
by adding up the read and write queue sizes of each CDC
Function driver instance. In a simple single instance USB CDC
device application, that does not require buffer queuing and serial
state notification, the USB_DEVICE_CDC_QUEUE_SIZE macro
can be set to 2. Consider a case with two CDC function driver
instances, CDC 1 has a read queue size of 2 and write queue size
of 3, CDC 2 has a read queue size of 4 and write queue size of 1,
this macro should be set to 10 (2 +3 + 4 + 1).
5.9.4.5.3 Library Initialization
Describes how the CDC Function Driver is initialized.
Description
The CDC function driver instance for a USB device configuration is initialized by the Device Layer when the configuration is set
by the host. This process does not require application intervention. Each instance of the CDC function driver should be
registered with the Device layer through the Device Layer Function Driver Registration Table. The CDC function driver does not
require a initialization data structure.The funcDriverInit member of the function driver registration table entry for the CDC function
driver instance should be set to NULL. The cdcFuncDriver object is a global object provided by the CDC function driver and
points to the CDC function driver - Device Layer interface functions which are required by the Device Layer. The code snippet
below shows an example of how multiple instances of CDC Function driver can registered with the Device Layer.
/* This code snippet shows an example of how two CDC function
* driver instances can be registered with the Device Layer
* via the Device Layer Function Driver Registration Table.
* In this case Device Configuration 1 consists of two CDC
* function driver instances. */
/* Define the CDC intialization data structure for CDC instance 0.
* Set read queue size to 2 and write queue size to 3 */
const USB_DEVICE_CDC_INIT cdcInit0 = {.queueSizeRead = 2, .queueSizeWrite = 3};
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/* Define the CDC intialization data structure for CDC instance 1.
* Set read queue size to 4 and write queue size to 1 */
const USB_DEVICE_CDC_INIT cdcInit1 = {.queueSizeRead = 4, .queueSizeWrite = 1};
const USB_DEVICE_FUNC_REGISTRATION_TABLE funcRegistrationTable[2] =
{
/* This is the first instance of the CDC Function Driver */
{
.speed = USB_SPEED_FULL|USB_SPEED_HIGH, // Supported speed
.configurationValue = 1, // To be initialized for Configuration 1
.interfaceNumber = 0, // Starting interface number.
.numberOfInterfaces = 2, // Number of interfaces in this instance
.funcDriverIndex = 0, // Function Driver instance index is 0
.funcDriverInit = &cdcInit0, // Function Driver initialization data structure
.driver = &cdcFuncDriver // Pointer to Function Driver - Device Layer interface
functions
},
/* This is the second instance of the CDC Function Driver */
{
.speed = USB_SPEED_FULL|USB_SPEED_HIGH, // Supported speed
.configurationValue = 1, // To be initialized for Configuration 1
.interfaceNumber = 2, // Starting interface number.
.numberOfInterfaces = 2, // Number of interfaces in this instance
.funcDriverIndex = 1, // Function Driver instance index is 1
.funcDriverInit = &cdcInit1, // Function Driver initialization data structure
.driver = &cdcFuncDriver // Pointer to Function Driver - Device Layer interface
functions
},
};
5.9.4.5.4 Event Handling
Describes CDC function driver event handler registration and event handling.
Description
Registering a CDC Function Driver Event Handler:
While creating a USB CDC Device based application, an event handler must be registered with the Device Layer (the Device
Layer Event Handler) and every CDC function driver instance (CDC Function Driver Event Handler). The CDC function driver
event handler receives CDC and CDC ACM events. This event handler should be registered before the USB device layer
acknowledges the SET CONFIGURATION request from the USB Host. In order to ensure this, the event handler should be set in
the USB_DEVICE_EVENT_CONFIGURED event that is generated by the device layer. While registering the CDC function driver
event handler, the CDC function driver allows the application to also pass a application context object. This object gets
associated with the instance of the CDC function driver and is returned by the CDC function driver when a CDC function driver
event occurs. The code example below shows an example of how this can be done.
/* This a sample Application Device Layer Event Handler
* Note how the CDC Function Driver event handler APP_USBDeviceCDCEventHandler()
* is registered in the USB_DEVICE_EVENT_CONFIGURED event. The appData
* object that is passed in the USB_DEVICE_CDC_EventHandlerSet()
* function will be returned as the userData parameter in the
* when the APP_USBDeviceCDCEventHandler() function is invoked */
void APP_USBDeviceEventCallBack ( USB_DEVICE_EVENT event,
USB_DEVICE_EVENT_DATA * eventData )
{
switch ( event )
{
case USB_DEVICE_EVENT_RESET:
case USB_DEVICE_EVENT_DECONFIGURED:
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// USB device is reset or device is deconfigured.
// This means that USB device layer is about to deininitialize
// all function drivers.
break;
case USB_DEVICE_EVENT_CONFIGURED:
/* check the configuration */
if ( eventData->eventConfigured.configurationValue == 1)
{
/* Register the CDC Device application event handler here.
* Note how the appData object pointer is passed as the
* user data */
USB_DEVICE_CDC_EventHandlerSet(USB_DEVICE_CDC_INDEX_0,
APP_USBDeviceCDCEventHandler, (uintptr_t)&appData);
/* mark that set configuration is complete */
appData.isConfigured = true;
}
break;
case USB_DEVICE_EVENT_SUSPENDED:
break;
case USB_DEVICE_EVENT_RESUMED:
case USB_DEVICE_EVENT_ATTACHED:
case USB_DEVICE_EVENT_DETACHED:
case USB_DEVICE_EVENT_ERROR:
default:
break;
}
}
CDC Function Driver Events:
The CDC Function Driver generates events that the application must respond. Some of these events are management requests
communicated through control transfers. The application must therefore complete the control transfer. Based on the generated
event, the application may be required to:
• Respond with a USB_DEVICE_CDC_ControlSend() function which is completes the data stage of a Control Read Transfer.
• Respond with a USB_DEVICE_CDC_ControlReceive() function which provisions the data stage of a Control Write Transfer.
• Respond with a USB_DEVICE_CDC_ControlStatus() function which completes the handshake stage of the Control Transfer.
The application can either STALL or Acknowledge the handshake stage via the USB_DEVICE_CDC_ControlStatus() function.
• Analyze the pData member of the event handler and check for event specific data. This data member should be type cast to
an event specific data type. The table below shows the event and the data type to use while type casting. Note that the pData
member is not required for all events
CDC Function Driver Event Related pData type
USB_DEVICE_CDC_EVENT_SET_LINE_CODING Not Applicable
USB_DEVICE_CDC_EVENT_GET_LINE_CODING Not Applicable
USB_DEVICE_CDC_EVENT_SET_CONTROL_LINE_STATE USB_DEVICE_CDC_EVENT_DATA_SET_CON
TROL_LINE_STATE
*
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USB_DEVICE_CDC_EVENT_SEND_BREAK USB_DEVICE_CDC_EVENT_DATA_SEND_BR
EAK
*
USB_DEVICE_CDC_EVENT_WRITE_COMPLETE USB_DEVICE_CDC_EVENT_DATA_WRITE_C
OMPLETE
*
USB_DEVICE_CDC_EVENT_READ_COMPLETE USB_DEVICE_CDC_EVENT_DATA_READ_C
OMPLETE
*
USB_DEVICE_CDC_EVENT_SERIAL_STATE_NOTIFICATION_COMPLETE USB_DEVICE_CDC_EVENT_DATA_SERIAL_S
TATE_NOTIFICATION_COMPLETE
*
USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_SENT Not Applicable
USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_RECEIVED Not Applicable
The possible CDC Function Driver events are described here along with the required application response, event specific data
and likely follow up function driver event:
1. USB_DEVICE_CDC_EVENT_SET_LINE_CODING
Application Response: This event occurs when the host issues a SET LINE CODING command. The application must provide a
USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING data structure to the device layer to receive the line coding data that
the host will provide. The application must provide the buffer by calling the USB_DEVICE_CDC_ControlReceive() function either
in the event handler or in the application (outside of the event handler function). The application must use the
controlTransferHandle parameter provided in the event while calling USB_DEVICE_CDC_ControlReceive() function. The
application can use the USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_SENT event to track completion of the
command.
Event Specific Data (pData): The pData parameter will be NULL.
Likely Follow-up event: This event will likely be followed by the
USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_RECEIVED event. This indicates that the data was received
successfully. The application must either acknowledge or stall the handshake stage of the control transfer by calling
USB_DEVICE_ControlStatus() function with USB_DEVICE_CONTROL_STATUS_OK or
USB_DEVICE_CONTROL_STATUS_ERROR flag respectively.
2. USB_DEVICE_CDC_EVENT_GET_LINE_CODING
Application Response: This event occurs when the host issues a GET LINE CODING command. The application must provide a
USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING data structure to the device layer that contains the line coding data
that to be provided to the host. The application must provide the buffer by calling the USB_DEVICE_CDC_ControlSend()
function either in the event handler or in the application (outside of the event handler function). The application must use the
controlTransferHandle parameter provided in the event while calling USB_DEVICE_CDC_ControlSend() function. The size of the
buffer is indicated by the length parameter. The application can use the
USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_SENT event to track completion of the command.
Event Specific Data (pData): The pData parameter will be NULL.
Likely Follow-up event: This event will likely be followed by the
USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_SENT event. This indicates that the data was sent to the host
successfully. The application must acknowledge the handshake stage of the control transfer by calling
USB_DEVICE_CDC_ControlStatus() function with USB_DEVICE_CONTROL_STATUS_OK flag.
3. USB_DEVICE_CDC_EVENT_SET_CONTROL_LINE_STATE
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Application Response: This event occurs when the host issues a SET CONTROL LINE STATE command. . The application can
then use the USB_DEVICE_CDC_ControlStatus() function to indicate acceptance of rejection of the command. The
USB_DEVICE_CDC_ControlStatus() function can be called from the event handler or in the application (out of the event handler
context). The application should use the controlTransferHandle while calling the USB_DEVICE_ControlStatus() function.
Event Specific Data (pData): The application must interpret the pData parameter as a pointer to a
USB_DEVICE_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE data type that contains the control line state data.
Likely Follow-up event: None.
4. USB_DEVICE_CDC_EVENT_SEND_BREAK
Application Response: This event occurs when the host issues a SEND BREAK command. The application can then use the
USB_DEVICE_CDC_ControlStatus() function to indicate acceptance of rejection of the command. The
USB_DEVICE_CDC_ControlStatus() function can be called from the event handler or in the application (out of the event handler
context). The application should use the controlTransferHandle while calling the USB_DEVICE_CDC_ControlStatus() function.
Event Specific Data (pData): The application must interpret the pData parameter as a pointer to a
USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK data type that contains the break duration data.
Likely Follow-up event: None.
5. USB_DEVICE_CDC_EVENT_WRITE_COMPLETE
Application Response: This event occurs when a write operation scheduled by calling the USB_DEVICE_CDC_Write() function
has completed. This event does not require the application to respond with any function calls..
Event Specific Data (pData): The pData member in the event handler will point to
USB_DEVICE_CDC_EVENT_DATA_WRITE_COMPLETE type.
Likely Follow-up event: None.
6. USB_DEVICE_CDC_EVENT_READ_COMPLETE
Application Response: This event occurs when a read operation scheduled by calling the USB_DEVICE_CDC_Read() function
has completed. This event does not require the application to respond with any function calls..
Event Specific Data (pData): The pData member in the event handler will point to
USB_DEVICE_CDC_EVENT_DATA_READ_COMPLETE type.
Likely Follow-up event: None.
7. USB_DEVICE_CDC_EVENT_SERIAL_STATE_NOTIFICATION_COMPLETE
Application Response: This event occurs when a serial state notfication send scheduled by calling the
USB_DEVICE_CDC_SerialStateNotificationSend() function has completed. This event does not require the application to
respond with any function calls..
Event Specific Data (pData): The pData member in the event handler will point to
USB_DEVICE_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_COMPLETE type.
Likely Follow-up event: None.
8. USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_SENT
Application Response: This event occurs when the data stage of a control read transfer has completed in response to the
USB_DEVICE_CDC_ControlSend() function (in the USB_DEVICE_CDC_EVENT_GET_LINE_CODING event). The application
must acknowledge the handshake stage of the control transfer by calling USB_DEVICE_CDC_ControlStatus() function with
USB_DEVICE_CONTROL_STATUS_OK flag.
Event Specific Data (pData): The pData parameter will be NULL.
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Likely Follow-up event: None.
9. USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_RECEIVED
Application Response: This event occurs when the data stage of a control write transfer has completed in response to the
USB_DEVICE_CDC_ControlReceive() function (in the USB_DEVICE_CDC_EVENT_SET_LINE_CODING event). The
application must either acknowledge or stall the handshake stage of the control transfer by calling
USB_DEVICE_CDC_ControlStatus() function with USB_DEVICE_CONTROL_STATUS_OK or
USB_DEVICE_CONTROL_STATUS_ERROR flag respectively.
Event Specific Data (pData): The pData parameter will be NULL.
Likely Follow-up event: None.
CDC Function Driver Event Handling:
The following code snippet shows an example event handling scheme. The application always returns from the event handler
with a USB_DEVICE_CDC_EVENT_RESPONSE_NONE value.
// This code example shows all CDC Function Driver possible events
// and a possible scheme for handling these events. In this case
// event responses are not deferred.
USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING_DATA setLineCodingData;
USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING_DATA getLineCodingData;
USB_DEVICE_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_DATA controlLineStateData;
USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK_DATA breakData;
USB_DEVICE_CDC_EVENT_RESPONSE USBDeviceCDCEventHandler
(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_EVENT event,
uintptr_t controlTransferHandle,
void * data,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_CDC_EVENT_SET_LINE_CODING:
// In this case, the application should read the line coding
// data that is sent by the host.
USB_DEVICE_CDC_ControlReceive(usbDeviceHandle, controlTransferHandle
&setLineCodingData,
sizeof(USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING));
break;
case USB_DEVICE_CDC_EVENT_GET_LINE_CODING:
// In this case, the application should send the line coding
// data to the host.
USB_DEVICE_CDC_ControlSend(usbDeviceHandle, controlTransferHandle
&getLineCodingData,
sizeof(USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING));
break;
case USB_DEVICE_CDC_EVENT_SET_CONTROL_LINE_STATE:
// In this case, pData will point to a
// USB_DEVICE_CDC_EVENT_DATA_SET_CONTROL_LINE_STATtype data object that
// will contain the control line state data sent by the host.
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controlLineStateData.dtr =
((USB_DEVICE_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE *)pData)->dtr;
controlLineStateData.carrier =
((USB_DEVICE_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE *)pData)->carrier;
USB_DEVICE_CDC_ControlStatus(usbDeviceHandle, controlTransferHandle,
USB_DEVICE_CONTROL_STATUS_OK);
break;
case USB_DEVICE_CDC_EVENT_SEND_BREAK:
// In this case, pData will point to a
// USB_DEVICE_CDC_EVENT_SEND_BREAK_DATA type data object that
// will contain the break duration sent by the host.
breakData.duration = ((USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK *)pData)->duration;
USB_DEVICE_CDC_ControlStatus(usbDeviceHandle, controlTransferHandle,
USB_DEVICE_CONTROL_STATUS_OK);
break;
case USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_SENT:
case USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_RECEIVED:
// This means that the data stage is complete. The data in
// setLineCodingData is valid or data in getLineCodingData was
// sent to the host. The application can now decide whether it
// supports this data. It is not mandatory to do this in the
// event handler.
USB_DEVICE_ControlStatus(usbDeviceHandle, controlTransferHandle,
USB_DEVICE_CONTROL_STATUS_OK);
case USB_DEVICE_CDC_EVENT_WRITE_COMPLETE:
// This means USB_DEVICE_CDC_Write() operation completed.
// The pData member will point to a
// USB_DEVICE_CDC_EVENT_DATA_WRITE_COMPLETE type of data.
break;
case USB_DEVICE_CDC_EVENT_READ_COMPLETE:
// This means USB_DEVICE_CDC_Read() operation completed.
// The pData member will point to a
// USB_DEVICE_CDC_EVENT_DATA_READ_COMPLETE type of data.
break;
case USB_DEVICE_CDC_EVENT_SERIAL_STATE_NOTIFICATION_COMPLETE:
// This means USB_DEVICE_CDC_SerialStateNotification() operation
// completed. The pData member will point to a
// USB_DEVICE_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_COMPLETE type of data.
break;
default:
break;
}
return(USB_DEVICE_CDC_EVENT_RESPONSE_NONE);
}
Refer to the USB_DEVICE_CDC_EVENT enumeration for more details on each event.
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5.9.4.5.5 Sending Data
Describes how to send data to the CDC Host.
Description
The application may need to send data or serial state notification to the USB CDC Host. This is done by using the
USB_DEVICE_CDC_Write() and USB_DEVICE_CDC_SerialStateNotificationSend() functions respectively.
1. Sending data to the USB Host:
The application can send data to the host by using the USB_DEVICE_CDC_Write() function. This function returns a transfer
handler that allows the application to track the read request. The request is completed when the host as requested for the data.
The completion of the write transfer is indicated by USB_DEVICE_CDC_EVENT_WRITE_COMPLETE event. A write request
could fail if the function driver instance transfer queue is full.
The USB_DEVICE_CDC_Write() function also allows the application to send data to the host without ending the transfer. This is
done by specifying the USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_PENDING flag. The application can use this option
when the data to be sent is not readily available or when the application is memory constrained. The combination of the transfer
flag and the transfer size affects how the function driver sends the data to the host.
a. If size is a multiple of maxPacketSize (the IN endpoint size) and flag is set as
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE, the write function will append a Zero Length Packet (ZLP) to
complete the transfer.
b. If size is a multiple of maxPacketSize and flag is set as USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING,
the write function will not append a ZLP and hence will not complete the transfer.
c. If size is greater than but not a multiple of maxPacketSize and flags is set as
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE, the write function schedules (length/maxPacketSize) packets
and one packet for the residual data.
d. If size is greater than but not a multiple of maxPacketSize and flags is set as
USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING, the write function schedules (size/maxPacketSize)
packets only.
e. If size is less than maxPacketSize and flag is set as USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE, the write
function schedules one packet.
f. If size is less than maxPacketSize and flag is set as USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING, the
write function returns an error code and sets the transferHandle parameter to
USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID.
The following code snippet explains this in more detail:
// Below is a set of examples showing various conditions trying to
// send data with the USB_DEVICE_CDC_Write() command.
//
// This assumes that driver was opened successfully.
// Assume maxPacketSize is 64.
USB_DEVICE_CDC_TRANSFER_HANDLE transferHandle;
USB_DEVICE_CDC_RESULT writeRequestHandle;
USB_DEVICE_CDC_INDEX instance;
//-------------------------------------------------------
// In this example we want to send 34 bytes only.
writeRequestResult = USB_DEVICE_CDC_Write(instance,
&transferHandle, data, 34,
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USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE);
if(USB_DEVICE_CDC_RESULT_OK != writeRequestResult)
{
//Do Error handling here
}
//-------------------------------------------------------
// In this example we want to send 64 bytes only.
// This will cause a ZLP to be sent.
writeRequestResult = USB_DEVICE_CDC_Write(instance,
&transferHandle, data, 64,
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE);
if(USB_DEVICE_CDC_RESULT_OK != writeRequestResult)
{
//Do Error handling here
}
//-------------------------------------------------------
// This example will return an error because size is less
// than maxPacketSize and the flag indicates that more
// data is pending.
writeRequestResult = USB_DEVICE_CDC_Write(instanceHandle,
&transferHandle, data, 32,
USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING);
//-------------------------------------------------------
// In this example we want to place a request for a 70 byte transfer.
// The 70 bytes will be sent out in a 64 byte transaction and a 6 byte
// transaction completing the transfer.
writeRequestResult = USB_DEVICE_CDC_Write(instanceHandle,
&transferHandle, data, 70,
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE);
if(USB_DEVICE_CDC_RESULT_OK != writeRequestResult)
{
//Do Error handling here
}
//-------------------------------------------------------
// In this example we want to place a request for a 70 bytes to be sent
// but that we don't end the transfer as more data is coming. 64 bytes
// of the 70 will be sent out and the USB_DEVICE_CDC_EVENT_WRITE_COMPLETE
// with 64 bytes. This indicates that the extra 6 bytes weren't
// sent because it would cause the end of the transfer. Thus the
// user needs add these 6 bytes back to the buffer for the next group
// of data that needs to be sent out.
writeRequestResult = USB_DEVICE_CDC_Write(instanceHandle,
&transferHandle, data, 70,
USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING);
if(USB_DEVICE_CDC_RESULT_OK != writeRequestResult)
{
//Do Error handling here
}
// The completion of the write request will be indicated by the
// USB_DEVICE_CDC_EVENT_WRITE_COMPLETE event.
2. Sending a serial state notification:
The application can send a Serial State Notification by using the USB_DEVICE_CDC_SerialStateSend() function. his function
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returns a transfer handler that allows the application to track the read request. The request is completed when the host as
requested for the data. The completion of the transfer is
USB_DEVICE_CDC_EVENT_SERIAL_STATE_NOTIFICATION_COMPLETE event. A request could fail if the function driver
transfer queue is full. The following code snippet shows an example of how this can be done.
USB_DEVICE_CDC_INDEX instanceIndex;
USB_DEVICE_CDC_TRANSFER_HANDLE transferHandle;
USB_DEVICE_CDC_SERIAL_STATE_NOTIFICATION_DATA notificationData;
// This application function could possibly update the notificationData
// data structure.
APP_UpdateNotificationData(¬ificationData);
// Now send the updated notification data to the host.
result = USB_DEVICE_CDC_SerialStateDataSend(instanceIndex, &transferHandle,
¬ificationData);
if(USB_DEVICE_CDC_RESULT_OK != result)
{
// Error handling here
}
5.9.4.5.6 Receiving Data
Describes how the CDC device can read data from the Host.
Description
The application can receive data from the host by using the USB_DEVICE_CDC_Read() function. This function returns a
transfer handler that allows the application to track the read request. The request is completed when the host sends the required
amount or less than required amount of data. The application must make sure that it allocates a buffer size that is at least the
size or a multiple of the receive endpoint size. The return value of the function indicates the success of the request. A read
request could fail if the function driver transfer queue is full. The completion of the read transfer is
USB_DEVICE_CDC_EVENT_READ_COMPLETE event. The request completes based on the amount of the data that was
requested and size of the transaction initiated by the host.
a. If the size parameter is not a multiple of maxPacketSize or is 0, the function returns
USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID in transferHandle and returns
USB_DEVICE_CDC_RESULT_ERROR_TRANSFER_SIZE_INVALID as a return value.
b. If the size parameter is a multiple of maxPacketSize and the host send less than maxPacketSize data in any transaction, the
transfer completes and the function driver will issue a USB_DEVICE_CDC_EVENT_READ_COMPLETE event along with the
USB_DEVICE_CDC_EVENT_READ_COMPLETE_DATA data structure.
c. If the size parameter is a multiple of maxPacketSize and the host sends maxPacketSize amount of data, and total data
received does not exceed size, then the function driver will wait for the next packet.
The following code snippet shows an example if the USB_DEVICE_CDC_Read() function:
// Shows an example of how to read. This assumes that
// driver was opened successfully.
USB_DEVICE_CDC_TRANSFER_HANDLE transferHandle;
USB_DEVICE_CDC_RESULT readRequestResult;
USB_DEVICE_CDC_HANDLE instanceHandle;
readRequestResult = USB_DEVICE_CDC_Read(instanceHandle,
&transferHandle, data, 128);
if(USB_DEVICE_CDC_RESULT_OK != readRequestResult)
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{
//Do Error handling here
}
// The completion of the read request will be indicated by the
// USB_DEVICE_CDC_EVENT_READ_COMPLETE event.
5.9.4.6 Library Interface
Data Types and Constants
Name Description
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE USB Device CDC Function
Driver Control Transfer
Handle
USB_DEVICE_CDC_EVENT USB Device CDC Function
Driver Control Transfer
Status
USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING USB Device CDC Event Get
Line Coding Data Type.
USB_DEVICE_CDC_EVENT_DATA_READ_COMPLETE USB Device CDC Function
Driver Read and Write
Complete Event Data.
USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK USB Device CDC Event Set
Break Data Type.
USB_DEVICE_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_COMPLETE USB Device CDC Function
Driver Read and Write
Complete Event Data.
USB_DEVICE_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE USB Device CDC Event Set
Line Coding Data Type.
USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING USB Device CDC Event Set
Line Coding Data Type.
USB_DEVICE_CDC_EVENT_DATA_WRITE_COMPLETE USB Device CDC Function
Driver Read and Write
Complete Event Data.
USB_DEVICE_CDC_EVENT_HANDLER USB Device CDC Event
Handler Function Pointer
Type.
USB_DEVICE_CDC_EVENT_RESPONSE USB Device CDC Function
Driver Event Callback
Response Type
USB_DEVICE_CDC_INDEX USB Device CDC Function
Driver Index
USB_DEVICE_CDC_INIT USB Device CDC Function
Driver Initialization Data
Structure
USB_DEVICE_CDC_RESULT USB Device CDC Function
Driver USB Device CDC
Result enumeration.
USB_DEVICE_CDC_SERIAL_STATE_NOTIFICATION_DATA USB Device Serial State
Notification Data Type.
USB_DEVICE_CDC_TRANSFER_FLAGS USB Device CDC Function
Driver Transfer Flags
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USB_DEVICE_CDC_TRANSFER_HANDLE USB Device CDC Function
Driver Transfer Handle
Definition.
USB_DEVICE_CDC_EVENT_RESPONSE_NONE USB Device CDC Function
Driver Event Handler
Response Type None.
USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID USB Device CDC Function
Driver Invalid Transfer
Handle Definition.
Functions
Name Description
USB_DEVICE_CDC_ControlReceive This function allows the application to respond to the CDC
function driver specific control transfer requests. It allows the
application to receive data from the host in the data stage of the
control transfer.
USB_DEVICE_CDC_ControlSend This function allows the application to respond to the CDC
function driver specific control transfer requests. It allows the
application to send data to the host in the data stage of the
control transfer.
USB_DEVICE_CDC_ControlStatus This function allows the application to complete the status stage
of the the CDC Function Driver specific control transfer request.
USB_DEVICE_CDC_EventHandlerSet This function registers a event handler for the specified CDC
function driver instance.
USB_DEVICE_CDC_Read This function requests a data read from the USB Device CDC
Function Driver Layer.
USB_DEVICE_CDC_SerialStateNotificationSend This function schedules a request to send serial state notification
to the host.
USB_DEVICE_CDC_Write This function requests a data write to the USB Device CDC
Function Driver Layer.
Description
5.9.4.6.1 Functions
5.9.4.6.1.1 USB_DEVICE_CDC_ControlReceive Function
C
USB_DEVICE_CDC_RESULT USB_DEVICE_CDC_ControlReceive(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * data,
size_t size
);
Description
This function allows the application to respond to the CDC function driver specific control transfer requests. It allows the
application to receive data from the host in the data stage of the control transfer. For example, the
USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING event requires a control transfer response. The function can be
called in the CDC Function Driver event handler or can be called outside the event handler. Calling this function outside the
event handler defers the response to the event. This allows the application to prepare the data buffer out of the event handler
context, especially if the data buffer to receive the data is not readily available. Note however, that there are timing
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considerations when responding to the control transfer. Exceeding the response time will cause the host to cancel the control
transfer and may cause USB host to reject the device. The application must use the control transfer handle that was generated
along with the event as the controlTransferHandle.
Preconditions
This function should only be called in response to a CDC function driver event that requires a control transfer response.
Parameters
Parameters Description
instance USB Device CDC Function Driver instance.
controlTransferHandle Control Transfer handle for the control transfer.
data Data buffer to receive the data stage of the control transfer.
size size (in bytes) of the data to sent.
Returns
USB_DEVICE_CDC_RESULT_ERROR_CONTROL_TRANSFER_FAILED - The request was not successful because the USB
host cancelled the control transfer.
USB_DEVICE_CDC_RESULT_OK - The request was successful.
Remarks
None.
Example
// ------------------------------------------------------------------
// In this example, the application responds to the SET LINE CODING
// with in the event handler. The application uses the
// USB_DEVICE_CDC_ControlReceive() function to do this.
// ------------------------------------------------------------------
USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING setLineCodingData;
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle;
USB_DEVICE_CDC_EVENT_RESPONSE USBDeviceCDCEventHandler
(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_EVENT event,
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_CDC_EVENT_SET_LINE_CODING:
// In this case, the application should receive the line coding
// data from the host. The application must use the
// USB_DEVICE_CDC_ControlReceive() function to receive the data.
USB_DEVICE_CDC_ControlReceive(instanceIndex, controlTransferHandle
&setLineCodingData,
sizeof(USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING));
break;
}
}
// --------------------------------------------------------------------
// In this example, the application defers the response to the
// event. This is done by calling the USB_DEVICE_CDC_ControlReceive()
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// function after the event handler exits.
// --------------------------------------------------------------------
USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING setLineCodingData;
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE thisControlTransferHandle;
bool sendLineCodingToHost;
USB_DEVICE_CDC_EVENT_RESPONSE USBDeviceCDCEventHandler
(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_EVENT event,
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_CDC_EVENT_SET_LINE_CODING:
// In this case, the application should send the line coding
// data to the host. The application must responds to the
// event outside the event handler because the data buffer is
// not available.
thisControlTransferHandle = controlTransferHandle;
getLineCodingFromHost = true;
break;
}
}
if(getLineCodingFromHost)
{
// The application allocates a buffer using an arbitrary function
// Note that this happens after the event handler exits.
setLineCoding = AllocateMemoryBuffer();
USB_DEVICE_CDC_ControlReceive(instanceIndex, thisControlTransferHandle
&setLineCodingData,
sizeof(USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING));
}
5.9.4.6.1.2 USB_DEVICE_CDC_ControlSend Function
C
USB_DEVICE_CDC_RESULT USB_DEVICE_CDC_ControlSend(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * data,
size_t size
);
Description
This function allows the application to respond to the CDC function driver specific control transfer requests. It allows the
application to send data to the host in the data stage of the control transfer. For example, the
USB_DEVICE_CDC_EVENT_GET_LINE_CODING event requires a control transfer response. The function can be called in the
CDC Function Driver event handler or can be called outside the event handler. Calling this function outside the event handler
defers the response to the event. This allows the application to prepare the response data out of the event handler context,
especially if the data is not readily available. Note however, that there are timing considerations when responding to the control
transfer. Exceeding the response time will cause the host to cancel the control transfer and may cause USB host to reject the
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device. The application must use the control transfer handle that was generated along with the event as the
controlTransferHandle.
Preconditions
This function should only be called in response to a CDC function driver event that requires a control transfer response.
Parameters
Parameters Description
instance USB Device CDC Function Driver instance.
controlTransferHandle Control Transfer handle for the control transfer.
data Data that represents the data stage of the control transfer.
size size (in bytes) of the data to sent.
Returns
USB_DEVICE_CDC_RESULT_ERROR_CONTROL_TRANSFER_FAILED - The request was not successful because the USB
host cancelled the control transfer.
USB_DEVICE_CDC_RESULT_OK - The request was successful.
Remarks
None.
Example
// ------------------------------------------------------------------
// In this example, the application responds to the GET LINE CODING
// with in the event handler. The application uses the
// USB_DEVICE_CDC_ControlSend() function to do this.
// ------------------------------------------------------------------
USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING getLineCodingData;
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle;
USB_DEVICE_CDC_EVENT_RESPONSE USBDeviceCDCEventHandler
(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_EVENT event,
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_CDC_EVENT_GET_LINE_CODING:
// In this case, the application should send the line coding
// data to the host. The application must use the
// USB_DEVICE_CDC_ControlSend() function to send the data.
USB_DEVICE_CDC_ControlSend(instanceIndex, controlTransferHandle
&getLineCodingData,
sizeof(USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING));
break;
}
}
// --------------------------------------------------------------------
// In this example, the application defers the response to the
// event. This is done by calling the USB_DEVICE_CDC_ControlSend()
// function after the event handler exits.
// --------------------------------------------------------------------
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USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING getLineCodingData;
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE thisControlTransferHandle;
bool sendLineCodingToHost;
USB_DEVICE_CDC_EVENT_RESPONSE USBDeviceCDCEventHandler
(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_EVENT event,
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_CDC_EVENT_GET_LINE_CODING:
// In this case, the application should send the line coding
// data to the host. The application does not call
// USB_DEVICE_CDC_ControlSend() function
// in the event handler, because it does not have the line
// coding data ready.
thisControlTransferHandle = controlTransferHandle;
sendLineCodingToHost = true;
break;
}
}
// This is outside the event handler.
if(sendLineCodingToHost)
{
// The application fetches the line coding from the
// an EEPROM.
GetLineCodingFromEEPROM(&getLineCoding);
USB_DEVICE_CDC_ControlSend(instanceIndex, thisControlTransferHandle
&getLineCodingData,
sizeof(USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING));
}
5.9.4.6.1.3 USB_DEVICE_CDC_ControlStatus Function
C
USB_DEVICE_CDC_RESULT USB_DEVICE_CDC_ControlStatus(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle,
USB_DEVICE_CDC_CONTROL_STATUS status
);
Description
This function allows the application to complete the status stage of the the CDC Function Driver specific control transfer request.
The application can either accept the data stage or stall it. Calling this function with status set to
USB_DEVICE_CDC_CONTROL_STATUS_OK will acknowledge the status stage of the control transfer. The control transfer can
be stalled by setting the status parameter to USB_DEVICE_CDC_CONTROL_STATUS_ERROR. The function can be called in
the CDC Function Driver event handler or can be called outside the event handler. Calling this function outside the event handler
defers the response to the event. This allows the application to analyze the event response outside the event handler. Note
however, that there are timing considerations when responding to the control transfer. Exceeding the response time will cause
the host to cancel the control transfer and may cause USB host to reject the device. The application must use the control transfer
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handle that was generated along with the event as the controlTransferHandle. The application must be aware of events and
associated control transfers that do or do not require data stages. Incorrect usage of the USB_DEVICE_CDC_ControlStatus()
function could cause the device function to be non-compliant.
Preconditions
This function should only be called in response to a CDC function driver event that requires a control transfer response.
Parameters
Parameters Description
instance USB Device CDC Function Driver instance.
controlTransferHandle Control Transfer handle for the control transfer.
status Set to USB_DEVICE_CDC_CONTROL_STATUS_OK to acknowledge the control
transfer. Set to USB_DEVICE_CDC_CONTROL_STATUS_ERROR to stall the
transfer.
Returns
USB_DEVICE_CDC_RESULT_ERROR_CONTROL_TRANSFER_FAILED - The request was not successful because the USB
host cancelled the control transfer.
USB_DEVICE_CDC_RESULT_OK - The request was successful.
Remarks
None.
Example
// ------------------------------------------------------------------
// In this code example, the application responds to the the
// SEND BREAK event in the event handler.
// ------------------------------------------------------------------
USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK * sendBreakData;
USB_DEVICE_CDC_EVENT_RESPONSE USBDeviceCDCEventHandler
(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_EVENT event,
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_CDC_EVENT_SEND_BREAK:
// The application can check if the break duration is supported.
sendBreakData = (USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK *)pData;
if(IsBreakDurationSupported(sendBreakData->duration))
{
USB_DEVICE_CDC_ControlStatus(instanceIndex,
controlTransferHandle, USB_DEVICE_CDC_CONTROL_STATUS_OK);
}
else
{
// If the break duration is not supported the application
// can stall it.
USB_DEVICE_CDC_ControlStatus(instanceIndex,
controlTransferHandle, USB_DEVICE_CDC_CONTROL_STATUS_ERROR);
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}
break;
}
}
// --------------------------------------------------------------------
// In this example, the application defers the response to the
// SEND BREAK event. The application responds to the event
// after the event handler exits.
// --------------------------------------------------------------------
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE thisControlTransferHandle;
USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK * sendBreakData;
uint16_t breakDuration;
bool sendBreakEvent;
USB_DEVICE_CDC_EVENT_RESPONSE USBDeviceCDCEventHandler
(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_EVENT event,
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_CDC_EVENT_SEND_BREAK:
// Get the break duration.
sendBreakData = (USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK *)pData;
breakDuration = sendBreakData->duration
sendBreakEvent = true;
break;
}
}
if(sendBreakData)
{
// The application checks if the duration is supported
// Note that this occurs after the event handler has exited.
if(IsBreakDurationSupported(breakDuration))
{
USB_DEVICE_CDC_ControlStatus(instanceIndex,
controlTransferHandle, USB_DEVICE_CDC_CONTROL_STATUS_OK);
}
else
{
// If the break duration is not supported the application
// can stall it.
USB_DEVICE_CDC_ControlStatus(instanceIndex,
controlTransferHandle, USB_DEVICE_CDC_CONTROL_STATUS_ERROR);
}
}
5.9.4.6.1.4 USB_DEVICE_CDC_EventHandlerSet Function
C
USB_DEVICE_CDC_RESULT USB_DEVICE_CDC_EventHandlerSet(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_EVENT_HANDLER eventHandler,
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uintptr_t context
);
Description
This function registers a event handler for the specified CDC function driver instance. This function should be called by the client
when it receives a SET CONFIGURATION event from the device layer. A event handler must be registered for function driver to
respond to function driver specific commands. If the event handler is not registered, the device layer will stall function driver
specific commands and the USB device may not function.
Preconditions
This function should be called when the function driver has been initialized as a result of a set configuration.
Parameters
Parameters Description
instance Instance of the CDC Function Driver.
eventHandler A pointer to event handler function.
context Application specific context that is returned in the event handler.
Returns
USB_DEVICE_CDC_RESULT_OK - The operation was successful
USB_DEVICE_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance does not exist.
USB_DEVICE_CDC_RESULT_ERROR_PARAMETER_INVALID - The eventHandler parameter is NULL
Remarks
None.
Example
// This code snippet shows an example registering an event handler. Here
// the application specifies the context parameter as a pointer to an
// application object (appObject) that should be associated with this
// instance of the CDC function driver.
USB_DEVICE_CDC_RESULT result;
USB_DEVICE_CDC_EVENT_RESPONSE APP_USBDeviceCDCEventHandler
(
USB_DEVICE_CDC_INDEX instanceIndex ,
USB_DEVICE_CDC_EVENT event ,
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE controlTransferHandle
void* pData, uintptr_t context
)
{
// Event Handling comes here
switch(event)
{
...
}
return(USB_DEVICE_CDC_EVENT_RESPONSE_NONE);
}
result = USB_DEVICE_CDC_EventHandlerSet ( 0 ,&APP_EventHandler, (uintptr_t) &appObject);
if(USB_DEVICE_CDC_RESULT_OK != result)
{
SYS_ASSERT ( false , "invalid event handler function" );
}
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5.9.4.6.1.5 USB_DEVICE_CDC_Read Function
C
USB_DEVICE_CDC_RESULT USB_DEVICE_CDC_Read(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_TRANSFER_HANDLE * transferHandle,
void * data,
size_t size
);
Description
This function requests a data read from the USB Device CDC Function Driver Layer. The function places a requests with driver,
the request will get serviced as data is made available by the USB Host. A handle to the request is returned in the
transferHandle parameter. The termination of the request is indicated by the USB_DEVICE_CDC_EVENT_READ_COMPLETE
event. The amount of data read and the transfer handle associated with the request is returned along with the event in the pData
parameter of the event handler. The transfer handle expires when event handler for the
USB_DEVICE_CDC_EVENT_READ_COMPLETE exits. If the read request could not be accepted, the function returns an error
code and transferHandle will contain the value USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID.
If the size parameter is not a multiple of maxPacketSize or is 0, the function returns
USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID in transferHandle and returns an error code as a return value. If the size
parameter is a multiple of maxPacketSize and the host send less than maxPacketSize data in any transaction, the transfer
completes and the function driver will issue a USB_DEVICE_CDC_EVENT_READ_COMPLETE event along with the
USB_DEVICE_CDC_EVENT_READ_COMPLETE_DATA data structure. If the size parameter is a multiple of maxPacketSize
and the host sends maxPacketSize amount of data, and total data received does not exceed size, then the function driver will
wait for the next packet.
Preconditions
The function driver should have been configured.
Parameters
Parameters Description
instance USB Device CDC Function Driver instance.
transferHandle Pointer to a USB_DEVICE_CDC_TRANSFER_HANDLE type of variable. This
variable will contain the transfer handle in case the read request was successful.
data pointer to the data buffer where read data will be stored.
size Size of the data buffer. Refer to the description section for more details on how the
size affects the transfer.
Returns
USB_DEVICE_CDC_RESULT_OK - The read request was successful. transferHandle contains a valid transfer handle.
USB_DEVICE_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL - internal request queue is full. The write request could not
be added.
USB_DEVICE_CDC_RESULT_ERROR_TRANSFER_SIZE_INVALID - The specified transfer size was not a mulitple of endpoint
size or is 0.
USB_DEVICE_CDC_RESULT_ERROR_INSTANCE_NOT_CONFIGURED - The specified instance is not configured yet.
USB_DEVICE_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance was not provisioned in the application
and is invalid.
Remarks
None.
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Example
// Shows an example of how to read. This assumes that
// driver was opened successfully.
USB_DEVICE_CDC_TRANSFER_HANDLE transferHandle;
USB_DEVICE_CDC_RESULT readRequestResult;
USB_DEVICE_CDC_HANDLE instanceHandle;
readRequestResult = USB_DEVICE_CDC_Read(instanceHandle,
&transferHandle, data, 128);
if(USB_DEVICE_CDC_RESULT_OK != readRequestResult)
{
//Do Error handling here
}
// The completion of the read request will be indicated by the
// USB_DEVICE_CDC_EVENT_READ_COMPLETE event.
5.9.4.6.1.6 USB_DEVICE_CDC_SerialStateNotificationSend Function
C
USB_DEVICE_CDC_RESULT USB_DEVICE_CDC_SerialStateNotificationSend(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_TRANSFER_HANDLE * transferHandle,
USB_DEVICE_CDC_SERIAL_STATE_NOTIFICATION_DATA * notificationData
);
Description
This function places a request to send serial state notificatin data to the host. The function will place the request with the driver,
the request will get serviced when the data is requested by the USB host. A handle to the request is returned in the
transferHandle parameter. The termination of the request is indicated by the
USB_DEVICE_CDC_EVENT_SERIAL_STATE_NOTIFICATION_COMPLETE event. The amount of data transmitted and the
transfer handle associated with the request is returned along with the event in the serialStateNotificationCompleteData member
of pData paramter of the event handler. The transfer handle expires when the event handler for the
USB_DEVICE_CDC_EVENT_SERIAL_STATE_NOTIFICATION_COMPLETE event exits. If the send request could not be
accepted, the function returns an error code and transferHandle will contain the value
USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID.
Preconditions
The function driver should have been configured
Parameters
Parameters Description
instance USB Device CDC Function Driver instance.
transferHandle Pointer to a output only variable that will contain transfer handle.
notificationData USB_DEVICE_CDC_SERIAL_STATE_NOTIFICATION_DATA type of notification
data to be sent to the host.
Returns
USB_DEVICE_CDC_RESULT_OK - The request was successful. transferHandle contains a valid transfer handle.
USB_DEVICE_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL - Internal request queue is full. The request could not be
added.
USB_DEVICE_CDC_RESULT_ERROR_INSTANCE_NOT_CONFIGURED - The specified instance is not configured yet.
USB_DEVICE_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance was not provisioned in the application
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and is invalid.
Remarks
None.
Example
USB_DEVICE_CDC_SERIAL_STATE_NOTIFICATION_DATA notificationData;
// This application function could possibly update the notificationData
// data structure.
APP_UpdateNotificationData(¬ificationData);
// Now send the updated notification data to the host.
result = USB_DEVICE_CDC_SerialStateNotificationSend
(instanceIndex, &transferHandle, ¬ificationData);
if(USB_DEVICE_CDC_RESULT_OK != result)
{
// Error handling here. The transferHandle will contain
// USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID in this case.
}
5.9.4.6.1.7 USB_DEVICE_CDC_Write Function
C
USB_DEVICE_CDC_RESULT USB_DEVICE_CDC_Write(
USB_DEVICE_CDC_INDEX instanceIndex,
USB_DEVICE_CDC_TRANSFER_HANDLE * transferHandle,
const void * data,
size_t size,
USB_DEVICE_CDC_TRANSFER_FLAGS flags
);
Description
This function requests a data write to the USB Device CDC Function Driver Layer. The function places a requests with driver, the
request will get serviced as data is requested by the USB Host. A handle to the request is returned in the transferHandle
parameter. The termination of the request is indicated by the USB_DEVICE_CDC_EVENT_WRITE_COMPLETE event. The
amount of data written and the transfer handle associated with the request is returned along with the event in writeCompleteData
member of the pData parameter in the event handler. The transfer handle expires when event handler for the
USB_DEVICE_CDC_EVENT_WRITE_COMPLETE exits. If the read request could not be accepted, the function returns an error
code and transferHandle will contain the value USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID.
The behavior of the write request depends on the flags and size parameter. If the application intends to send more data in a
request, then it should use the USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING flag. If there is no more
data to be sent in the request, the application must use the USB_DEVICE_CDC_EVENT_WRITE_COMPLETE flag. This is
explained in more detail here:
• If size is a multiple of maxPacketSize and flag is set as
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE, the write function will append a Zero Length Packet (ZLP) to
complete the transfer.
• If size is a multiple of maxPacketSize and flag is set as
USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING, the write function will not append a ZLP and hence will
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not complete the transfer.
• If size is greater than but not a multiple of maxPacketSize and
flags is set as USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE, the write function schedules
(length/maxPacketSize) packets and one packet for the residual data.
• If size is greater than but not a multiple of maxPacketSize and flags is
set as USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING, the write function schedules (size/maxPacketSize)
packets only.
• If size is less than maxPacketSize and flag is set as
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE, the write function schedules one packet.
• If size is less than maxPacketSize and flag is set as
USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING, the write function returns an error code and sets the
transferHandle parameter to USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID.
Completion of the write transfer is indicated by the USB_DEVICE_CDC_EVENT_WRITE_COMPLETE event. The amount of
data written along with the transfer handle is returned along with the event.
Preconditions
The function driver should have been configured.
Parameters
Parameters Description
instance USB Device CDC Function Driver instance.
transferHandle Pointer to a USB_DEVICE_CDC_TRANSFER_HANDLE type of variable. This
variable will contain the transfer handle in case the write request was successful.
data pointer to the data buffer that contains the data to written.
size Size of the data buffer. Refer to the description section for more details on how the
size affects the transfer.
flags Flags that indicate whether the transfer should continue or end. Refer to the
description for more details.
Returns
USB_DEVICE_CDC_RESULT_OK - The write request was successful. transferHandle contains a valid transfer handle.
USB_DEVICE_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL - internal request queue is full. The write request could not
be added.
USB_DEVICE_CDC_RESULT_ERROR_TRANSFER_SIZE_INVALID - The specified transfer size and flag parameter are invalid.
USB_DEVICE_CDC_RESULT_ERROR_INSTANCE_NOT_CONFIGURED - The specified instance is not configured yet.
USB_DEVICE_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance was not provisioned in the application
and is invalid.
Remarks
None.
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Example
// Below is a set of examples showing various conditions trying to
// send data with the Write() command.
//
// This assumes that driver was opened successfully.
// Assume maxPacketSize is 64.
USB_DEVICE_CDC_TRANSFER_HANDLE transferHandle;
USB_DEVICE_CDC_RESULT writeRequestHandle;
USB_DEVICE_CDC_INDEX instance;
//-------------------------------------------------------
// In this example we want to send 34 bytes only.
writeRequestResult = USB_DEVICE_CDC_Write(instance,
&transferHandle, data, 34,
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE);
if(USB_DEVICE_CDC_RESULT_OK != writeRequestResult)
{
//Do Error handling here
}
//-------------------------------------------------------
// In this example we want to send 64 bytes only.
// This will cause a ZLP to be sent.
writeRequestResult = USB_DEVICE_CDC_Write(instance,
&transferHandle, data, 64,
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE);
if(USB_DEVICE_CDC_RESULT_OK != writeRequestResult)
{
//Do Error handling here
}
//-------------------------------------------------------
// This example will return an error because size is less
// than maxPacketSize and the flag indicates that more
// data is pending.
writeRequestResult = USB_DEVICE_CDC_Write(instanceHandle,
&transferHandle, data, 32,
USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING);
//-------------------------------------------------------
// In this example we want to place a request for a 70 byte transfer.
// The 70 bytes will be sent out in a 64 byte transaction and a 6 byte
// transaction completing the transfer.
writeRequestResult = USB_DEVICE_CDC_Write(instanceHandle,
&transferHandle, data, 70,
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE);
if(USB_DEVICE_CDC_RESULT_OK != writeRequestResult)
{
//Do Error handling here
}
//-------------------------------------------------------
// In this example we want to place a request for a 70 bytes to be sent but
// that we don't end the transfer as more data is coming. 64 bytes of the
// 70 will be sent out and the USB_DEVICE_CDC_EVENT_WRITE_COMPLETE with 64
// bytes. This indicates that the extra 6 bytes weren't sent because it
// would cause the end of the transfer. Thus the user needs add these 6
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// bytes back to the buffer for the next group of data that needs to be sent
// out.
writeRequestResult = USB_DEVICE_CDC_Write(instanceHandle,
&transferHandle, data, 70,
USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING);
if(USB_DEVICE_CDC_RESULT_OK != writeRequestResult)
{
//Do Error handling here
}
// The completion of the write request will be indicated by the
// USB_DEVICE_CDC_EVENT_WRITE_COMPLETE event.
5.9.4.6.2 Data Types and Constants
5.9.4.6.2.1 USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE Type
C
typedef USB_DEVICE_CONTROL_TRANSFER_HANDLE USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE;
Description
USB Device CDC Function Driver Control Transfer Handle
This is returned by the CDC function driver event handler and should be used by the application while responding to CDC
function driver control transfer requests.
Remarks
None.
5.9.4.6.2.2 USB_DEVICE_CDC_EVENT Enumeration
C
typedef enum {
USB_DEVICE_CDC_EVENT_SET_LINE_CODING,
USB_DEVICE_CDC_EVENT_GET_LINE_CODING,
USB_DEVICE_CDC_EVENT_SET_CONTROL_LINE_STATE,
USB_DEVICE_CDC_EVENT_SEND_BREAK,
USB_DEVICE_CDC_EVENT_WRITE_COMPLETE,
USB_DEVICE_CDC_EVENT_READ_COMPLETE,
USB_DEVICE_CDC_EVENT_SERIAL_STATE_NOTIFICATION_COMPLETE,
USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_SENT,
USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_RECEIVED
} USB_DEVICE_CDC_EVENT;
Description
USB Device CDC Function Driver Control Transfer Status
This flag is used along with the USB_DEVICE_CDC_ControlStatus() function to indicate success or failure of a CDC class
specific control transfer request.
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Members
Members Description
USB_DEVICE_CDC_EVENT_SET_LINE_CODING This event occurs when the host issues a SET
LINE CODING command. The application must
provide a
USB_DEVICE_CDC_EVENT_DATA_SET_LINE
_CODING
data structure to the device layer to receive the
line coding data that the host will provide. The
application must provide the buffer by calling the
USB_DEVICE_CDC_ControlReceive() function
either in the event handler or in the application
(outside the event handler function). The
application must use the controlTransferHandle
parameter provided in the event while calling
USB_DEVICE_CDC_ControlReceive() function.
The pData parameter will be NULL. The
application can use the
USB_DEVICE_CDC_EVENT_CONTROL_TRAN
SFER_DATA_RECEIVED
event to track completion of the command.
USB_DEVICE_CDC_EVENT_GET_LINE_CODING This event occurs when the host issues a GET
LINE CODING command. The application must
provide a
USB_DEVICE_CDC_EVENT_DATA_GET_LINE
_CODING
data structure to the device layer that contains
the line coding data to be provided to the host.
The application must provide the buffer by
calling the USB_DEVICE_CDC_ControlSend()
function either in the event handler or in the
application (outside the event handler function).
The application must use the
controlTransferHandle parameter provided in the
event while calling
USB_DEVICE_CDC_ControlSend() function.
The size of the buffer is indicated by the length
parameter. The application can use the
USB_DEVICE_CDC_EVENT_CONTROL_TRAN
SFER_DATA_SENT
event to track completion of the command.
USB_DEVICE_CDC_EVENT_SET_CONTROL_LINE_STATE This event occurs when the host issues a SET
CONTROL LINE STATE command. The
application must interpret the pData parameter
as
USB_DEVICE_CDC_EVENT_DATA_SET_CON
TROL_LINE_STATE
pointer type. This data structure contains the
control line state data. The application can then
use the USB_DEVICE_CDC_ControlStatus()
function to indicate acceptance or rejection of
the command. The
USB_DEVICE_CDC_ControlStatus() function
can be called from the event handler or in the
application (out of the event handler context).
The application should use the
controlTransferHandle while calling the
USB_DEVICE_CDC_ControlStatus() function.
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USB_DEVICE_CDC_EVENT_SEND_BREAK This event occurs when the host issues a SEND
BREAK command. The application must
interpret the pData parameter as a
USB_DEVICE_CDC_EVENT_SEND_BREAK_D
ATA
pointer type. This data structure contains the
break duration data. The application can then
use the USB_DEVICE_CDC_ControlStatus()
function to indicate acceptance of rejection of
the command. The
USB_DEVICE_CDC_ControlStatus() function
can be called from the event handler or in the
application (out of the event handler context).
The application should use the
controlTransferHandle while calling the
USB_DEVICE_CDC_ControlStatus() function.
USB_DEVICE_CDC_EVENT_WRITE_COMPLETE This event occurs when a write operation
scheduled by calling the
USB_DEVICE_CDC_Write() function has
completed. The pData parameter should be
interpreted as a
USB_DEVICE_CDC_EVENT_DATA_WRITE_C
OMPLETE
pointer type. This will contain the transfer handle
associated with the completed write transfer and
the amount of data written.
USB_DEVICE_CDC_EVENT_READ_COMPLETE This event occurs when a read operation
scheduled by calling the
USB_DEVICE_CDC_Read() function has
completed. The pData parameter should be
interpreted as a
USB_DEVICE_CDC_EVENT_DATA_READ_CO
MPLETE
pointer type. This will contain the transfer handle
associated with the completed read transfer and
the amount of data read.
USB_DEVICE_CDC_EVENT_SERIAL_STATE_NOTIFICATION_COMPLETE This event occurs when a serial state notification
scheduled using the
USB_DEVICE_CDC_SerialDataSend() function,
was sent to the host. The pData parameter
should be interpreted as a
USB_DEVICE_CDC_EVENT_DATA_SERIAL_S
TATE_NOTIFICATION_COMPLETE
pointer type and will contain the transfer handle
associated with the completed send transfer and
the amount of data sent.
USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_SENT This event occurs when the data stage of a
control read transfer has completed. This event
would occur after the application uses the
USB_DEVICE_CDC_ControlSend() function to
respond to the
USB_DEVICE_CDC_EVENT_GET_LINE_CODI
NG
event.
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USB_DEVICE_CDC_EVENT_CONTROL_TRANSFER_DATA_RECEIVED This event occurs when the data stage of a
control write transfer has completed. This would
occur after the application would respond with a
USB_DEVICE_CDC_ControlReceive() function
to the
USB_DEVICE_CDC_EVENT_SET_LINE_CODI
NG_EVENT
and the data has been received.
Remarks
None.
5.9.4.6.2.3 USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING Type
C
typedef USB_CDC_LINE_CODING USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING;
Description
USB Device CDC Event Get Line Coding Data Type.
This type defines the data type of the data that the user needs to respond with as a result of a
USB_DEVICE_CDC_EVENT_GET_LINE_CODING event. This data is sent to the host via the USB_DEVICE_ControlWrite()
function.
The valid values for the members of this structure are defined in table 17 of the PSTN120.pdf document. This document is part
of the CDC specification download available on the USB.org website:
http://www.usb.org/developers/devclass_docs/CDC1.2_WMC1.1_012011.zip
Remarks
None.
5.9.4.6.2.4 USB_DEVICE_CDC_EVENT_DATA_READ_COMPLETE Structure
C
typedef struct {
USB_DEVICE_CDC_TRANSFER_HANDLE handle;
size_t length;
} USB_DEVICE_CDC_EVENT_DATA_WRITE_COMPLETE, USB_DEVICE_CDC_EVENT_DATA_READ_COMPLETE,
USB_DEVICE_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_COMPLETE;
Description
USB Device CDC Function Driver Read and Write Complete Event Data.
This data type defines the data structure returned by the driver along with USB_DEVICE_CDC_EVENT_READ_COMPLETE and
USB_DEVICE_CDC_EVENT_WRITE_COMPLETE events.
Members
Members Description
5.9.4.6.2.5 USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK Structure
C
typedef struct {
uint16_t duration;
} USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK;
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Description
USB Device CDC Event Set Break Data Type.
This defines the data type of the data generated to the CDC event handler on a USB_DEVICE_CDC_EVENT_SEND_BREAK
event.
The SEND_BREAK command is described in section 6.3.13 of the PSTN120.pdf document. This document is part of the CDC
specification download available on the USB.org website:
http://www.usb.org/developers/devclass_docs/CDC1.2_WMC1.1_012011.zip
Remarks
None.
5.9.4.6.2.6 USB_DEVICE_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_COMPLETE
Structure
C
typedef struct {
USB_DEVICE_CDC_TRANSFER_HANDLE handle;
size_t length;
} USB_DEVICE_CDC_EVENT_DATA_WRITE_COMPLETE, USB_DEVICE_CDC_EVENT_DATA_READ_COMPLETE,
USB_DEVICE_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_COMPLETE;
Description
USB Device CDC Function Driver Read and Write Complete Event Data.
This data type defines the data structure returned by the driver along with USB_DEVICE_CDC_EVENT_READ_COMPLETE and
USB_DEVICE_CDC_EVENT_WRITE_COMPLETE events.
Members
Members Description
5.9.4.6.2.7 USB_DEVICE_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE Type
C
typedef USB_CDC_CONTROL_LINE_STATE USB_DEVICE_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE;
Description
USB Device CDC Event Set Control Line State Data Type.
This defines the data type of the data that should be provided to the function driver via the
USB_DEVICE_CDC_ControlReceive() function when the function driver generates
USB_DEVICE_CDC_EVENT_SET_CONTROL_LINE_STATE event.
Remarks
None.
5.9.4.6.2.8 USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING Type
C
typedef USB_CDC_LINE_CODING USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING;
Description
USB Device CDC Event Set Line Coding Data Type.
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This defines the data type of the data generated to the CDC event handler on a
USB_DEVICE_CDC_EVENT_SET_LINE_CODING event.
The valid values for the members of this structure are defined in table 17 of the PSTN120.pdf document. This document is part
of the CDC specification download available on the USB.org website:
http://www.usb.org/developers/devclass_docs/CDC1.2_WMC1.1_012011.zip
Remarks
None.
5.9.4.6.2.9 USB_DEVICE_CDC_EVENT_DATA_WRITE_COMPLETE Structure
C
typedef struct {
USB_DEVICE_CDC_TRANSFER_HANDLE handle;
size_t length;
} USB_DEVICE_CDC_EVENT_DATA_WRITE_COMPLETE, USB_DEVICE_CDC_EVENT_DATA_READ_COMPLETE,
USB_DEVICE_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_COMPLETE;
Description
USB Device CDC Function Driver Read and Write Complete Event Data.
This data type defines the data structure returned by the driver along with USB_DEVICE_CDC_EVENT_READ_COMPLETE and
USB_DEVICE_CDC_EVENT_WRITE_COMPLETE events.
Members
Members Description
5.9.4.6.2.10 USB_DEVICE_CDC_EVENT_HANDLER Type
C
typedef USB_DEVICE_CDC_EVENT_RESPONSE (* USB_DEVICE_CDC_EVENT_HANDLER)(USB_DEVICE_CDC_INDEX
instanceIndex, USB_DEVICE_CDC_EVENT event, USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE
controlTransferHandle, void * pData, uintptr_t context);
Description
USB Device CDC Event Handler Function Pointer Type.
This data type defines the required function signature of the USB Device CDC Function Driver event handling callback function.
The application must register a pointer to a CDC Function Driver events handling function who's function signature (parameter
and return value types) match the types specified by this function pointer in order to receive event call backs from the CDC
Function Driver. The function driver will invoke this function with event relevant parameters. The description of the event handler
function parameters is given here.
instanceIndex - Instance index of the CDC Function Driver that generated the event.
event - Type of event generated.
controlTransferHandle - Control Transfer Handle for CDC function driver events that require application response. The
application should use this handle when calling the USB CDC Device Control Transfer functions to respond to the events.
pData - This parameter should be type casted to a event specific pointer type based on the event that has occurred. Refer to the
USB_DEVICE_CDC_EVENT enumeration description for more details.
context - Value identifying the context of the application that was registered along with the event handling function.
Remarks
None.
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5.9.4.6.2.11 USB_DEVICE_CDC_EVENT_RESPONSE Type
C
typedef void USB_DEVICE_CDC_EVENT_RESPONSE;
Description
USB Device CDC Function Driver Event Handler Response Type
This is the return type of the CDC Function Driver event handler.
Remarks
None.
5.9.4.6.2.12 USB_DEVICE_CDC_INDEX Type
C
typedef uintptr_t USB_DEVICE_CDC_INDEX;
Description
USB Device CDC Function Driver Index
This uniquely identifies a CDC Function Driver instance.
Remarks
None.
5.9.4.6.2.13 USB_DEVICE_CDC_INIT Structure
C
typedef struct {
size_t queueSizeRead;
size_t queueSizeWrite;
size_t queueSizeSerialStateNotification;
} USB_DEVICE_CDC_INIT;
Description
USB Device CDC Function Driver Initialization Data Structure
This data structure must be defined for every instance of the CDC function driver. It is passed to the CDC function driver, by the
Device Layer, at the time of initialization. The funcDriverInit member of the Device Layer Function Driver registration table entry
must point to this data structure for an instance of the CDC function driver.
Members
Members Description
5.9.4.6.2.14 USB_DEVICE_CDC_RESULT Enumeration
C
typedef enum {
USB_DEVICE_CDC_RESULT_OK,
USB_DEVICE_CDC_RESULT_ERROR_TRANSFER_SIZE_INVALID,
USB_DEVICE_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL,
USB_DEVICE_CDC_RESULT_ERROR_INSTANCE_INVALID,
USB_DEVICE_CDC_RESULT_ERROR_INSTANCE_NOT_CONFIGURED,
USB_DEVICE_CDC_RESULT_ERROR_PARAMETER_INVALID,
USB_DEVICE_CDC_RESULT_ERROR_CONTROL_TRANSFER_FAILED
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} USB_DEVICE_CDC_RESULT;
Description
USB Device CDC Function Driver USB Device CDC Result enumeration.
This enumeration lists the possible USB Device CDC Function Driver operation results. These values are returned by USB
Device CDC Library functions.
Members
Members Description
USB_DEVICE_CDC_RESULT_OK The operation was successful
5.9.4.6.2.15 USB_DEVICE_CDC_SERIAL_STATE_NOTIFICATION_DATA Type
C
typedef USB_CDC_SERIAL_STATE USB_DEVICE_CDC_SERIAL_STATE_NOTIFICATION_DATA;
Description
USB Device CDC Serial State Notification Data Type.
This defines the data type for the CDC Serial State. This data is sent to the host over the CDC notification interface.
Remarks
None.
5.9.4.6.2.16 USB_DEVICE_CDC_TRANSFER_FLAGS Enumeration
C
typedef enum {
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE,
USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING
} USB_DEVICE_CDC_TRANSFER_FLAGS;
Description
USB Device CDC Transfer Flags
These flags are used to indicate status of the pending data while sending data to the host by using the
USB_DEVICE_CDC_Write() function.
Members
Members Description
USB_DEVICE_CDC_TRANSFER_FLAGS_DATA_COMPLETE This flag indicates there is no further data to be sent in
this transfer and that the transfer should end. If the size
of the transfer is a multiple of the maximum packet size
for related endpoint configuration, the function driver will
send a zero length packet to indicate end of the transfer
to the host.
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USB_DEVICE_CDC_TRANSFER_FLAGS_MORE_DATA_PENDING This flag indicates there is more data to be sent in this
transfer. If the size of the transfer is a multiple of the
maximum packet size for the related endpoint
configuration, the function driver will not send a zero
length packet. If the size of the transfer is greater than
(but not a multiple of) the maximum packet size, the
function driver will only send maximum packet size
amount of data. If the size of the transfer is greater than
endpoint size but not an exact multiple of endpoint size,
only the closest endpoint size multiple bytes of data will
be sent. This flag should not be specified if the size of the
transfer is less than maximum packet size.
Remarks
The relevance of the specified flag depends on the size of the buffer. Refer to the individual flag descriptions for more details.
5.9.4.6.2.17 USB_DEVICE_CDC_TRANSFER_HANDLE Type
C
typedef uintptr_t USB_DEVICE_CDC_TRANSFER_HANDLE;
Description
USB Device CDC Function Driver Transfer Handle Definition
This definition defines a USB Device CDC Function Driver Transfer Handle. A Transfer Handle is owned by the application but
its value is modified by the USB_DEVICE_CDC_Write(), USB_DEVICE_CDC_Read() and the
USB_DEVICE_CDC_SerialStateDataSend functions. The transfer handle is valid for the life time of the transfer and expires
when the transfer related event had occurred.
Remarks
None.
5.9.4.6.2.18 USB_DEVICE_CDC_EVENT_RESPONSE_NONE Macro
C
#define USB_DEVICE_CDC_EVENT_RESPONSE_NONE
Description
USB Device CDC Function Driver Event Handler Response None
This is the definition of the CDC Function Driver Event Handler Response Type none.
Remarks
Intentionally defined to be empty.
5.9.4.6.2.19 USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID Macro
C
#define USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID ((USB_DEVICE_CDC_TRANSFER_HANDLE)(-1))
Description
USB Device CDC Function Driver Invalid Transfer Handle Definition
This definition defines a USB Device CDC Function Driver Invalid Transfer Handle. A Invalid Transfer Handle is returned by the
USB_DEVICE_CDC_Write(), USB_DEVICE_CDC_Read() and the USB_DEVICE_CDC_SerialStateNotificationSend() functions
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when the request was not successful.
Remarks
None.
5.9.4.7 Files
Files
Name Description
usb_device_cdc.h USB Device CDC Function Driver Interface
Description
5.9.4.7.1 usb_device_cdc.h
USB Device CDC Function Driver Interface
This file describes the USB Device CDC Function Driver interface.
Enumerations
Name Description
USB_DEVICE_CDC_EVENT USB Device CDC Function Driver Control Transfer Status
USB_DEVICE_CDC_RESULT USB Device CDC Function Driver USB Device CDC Result
enumeration.
USB_DEVICE_CDC_TRANSFER_FLAGS USB Device CDC Function Driver Transfer Flags
Functions
Name Description
USB_DEVICE_CDC_ControlReceive This function allows the application to respond to the CDC
function driver specific control transfer requests. It allows the
application to receive data from the host in the data stage of the
control transfer.
USB_DEVICE_CDC_ControlSend This function allows the application to respond to the CDC
function driver specific control transfer requests. It allows the
application to send data to the host in the data stage of the
control transfer.
USB_DEVICE_CDC_ControlStatus This function allows the application to complete the status stage
of the the CDC Function Driver specific control transfer request.
USB_DEVICE_CDC_EventHandlerSet This function registers a event handler for the specified CDC
function driver instance.
USB_DEVICE_CDC_Read This function requests a data read from the USB Device CDC
Function Driver Layer.
USB_DEVICE_CDC_SerialStateNotificationSend This function schedules a request to send serial state notification
to the host.
USB_DEVICE_CDC_Write This function requests a data write to the USB Device CDC
Function Driver Layer.
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Macros
Name Description
USB_DEVICE_CDC_EVENT_RESPONSE_NONE USB Device CDC Function Driver Event Handler Response
Type None.
USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID USB Device CDC Function Driver Invalid Transfer Handle
Definition.
Structures
Name Description
USB_DEVICE_CDC_EVENT_DATA_READ_COMPLETE USB Device CDC Function
Driver Read and Write
Complete Event Data.
USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK USB Device CDC Event Set
Break Data Type.
USB_DEVICE_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_COMPLETE USB Device CDC Function
Driver Read and Write
Complete Event Data.
USB_DEVICE_CDC_EVENT_DATA_WRITE_COMPLETE USB Device CDC Function
Driver Read and Write
Complete Event Data.
USB_DEVICE_CDC_INIT USB Device CDC Function
Driver Initialization Data
Structure
Types
Name Description
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE USB Device CDC Function Driver Control
Transfer Handle
USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING USB Device CDC Event Get Line Coding
Data Type.
USB_DEVICE_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE USB Device CDC Event Set Line Coding
Data Type.
USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING USB Device CDC Event Set Line Coding
Data Type.
USB_DEVICE_CDC_EVENT_HANDLER USB Device CDC Event Handler Function
Pointer Type.
USB_DEVICE_CDC_EVENT_RESPONSE USB Device CDC Function Driver Event
Callback Response Type
USB_DEVICE_CDC_INDEX USB Device CDC Function Driver Index
USB_DEVICE_CDC_SERIAL_STATE_NOTIFICATION_DATA USB Device Serial State Notification Data
Type.
USB_DEVICE_CDC_TRANSFER_HANDLE USB Device CDC Function Driver Transfer
Handle Definition.
Company
Microchip Technology Incorporated
FileName: usb_device_cdc.h
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5.9.5 USB Generic Device Library
5.9.5.1 Introduction
Introduces the MPLAB Harmony USB Generic Device Library.
Description
The USB Generic Device library provides a framework to develop custom or vendor class USB device applications . The library
supports all USB transfer types (control, bulk, interrupt, isochronous) along with endpoint management functions. The USB
device generic library implementation supports USB specification 2.0. Following figure illustrates how Generic Device Library fits
into the MPLAB Harmony USB Device Stack architecture .
Figure: MPLAB Harmony USB Device library architecture
This USB Generic Device Library offers services to the application to interact and respond to the host requests. USB Generic
Device library is also referred to as Generic function driver in this document.
5.9.5.2 Release Notes
MPLAB Harmony Version: v0.70b USB Generic Device Library Version : 0.01 Alpha Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
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Known Issues:
Nothing to report in this release.
5.9.5.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.9.5.4 Library Architecture
5.9.5.4.1 Library Overview
Provides an overview of the Generic Device function driver.
Description
The Generic Device function driver overview diagram is shown below.
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Figure: USB DEVICE GENERIC Library Overview diagram
A Generic function driver instance is a collection of Generic USB interfaces.
The device management on end point zero is handled by the device library(vendor class specific requests are routed to the
Generic function driver by device library).
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the USB DEVICE Generic module.
Library Interface Section Description
Client Setup Details Opening an instance of the USB Generic function driver, registering
callback with the USB Generic function driver and closing an instance of
the USB Generic function driver.
Client Data Handling Details read/write to/from the host
Client Subclass Specific Details the supported sub class specific management requests and
notification.
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5.9.5.4.2 Abstraction Model
Provides an architectural overview of the USB Generic Device function driver.
Description
The USB Generic Device function driver offers various services to a vendor specific class USB device to communicate with the
host by abstracting USB specification details. The USB Generic Device function driver with USB DEVICE layer and USB
controller driver forms the basic library entity using which the device can communicate with the USB host.The basic software
architecture into which Generic function driver fits into is depicted in the following diagram.
Figure: USB DEVICE Generic Software Abstraction Block Diagram
Vendor specific functions have to register a set of standard APIs with the generic library. This library calls these APIs as call
back function at run time. For example, vendor specific tasks function routine is called when USB device generic function driver
receives vendor specific transfer from a USB host. All generic function driver tasks are called from the task routine of USB device
layer. so here maximum performance of the device can be achieved with this library.
The USB controller driver takes the responsibility of managing the USB peripheral on the device. The USB device layer handles
the device enumeration etc. For more details about the USB controller driver and USB device layer library kindly refer to the
corresponding documents.
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5.9.5.5 Using the Library
5.9.5.5.1 Files to Include
Describes which files to include in the project to use the Generic Device Function Driver.
Description
The following table shows the files that must be included in the project in order to use the Generic Function Driver. These files
are located in the framework folder of the MPLAB Harmony installation. It is assumed that the Device Layer files ( and the files
needed by the Device Layer) are already included in the project. A path to the framework folder in the Harmony installation
should be added to the project include search path.
Filename Description
\framework\usb\src\usb_device_generic.c Contains the implementation of the Generic device function driver.
\framework\usb\usb_device_generic.h Must be included in every file that needs to invoke the Generic device function driver
API
system_config.h User created file which contains the Generic device function driver configuration.
5.9.5.5.2 Library Configuration
Describes how to configure the Generic Function Driver.
Description
The configuration of the USB Generic Device Function Driver is contained in system_config.h These configuration settings will
apply to all instances of the USB Generic Device Function Driver. This header can be placed anywhere; however, the path of this
header needs to be present in the include search path for a successful build. Refer to the Applications Overview section for more
details.
This section explains the data structures that need to be setup by the application to use the Generic function driver. For setting
data relevant for other modules (device layer and controller driver) kindly refer to the respective module documentation.
Constants:
USB_DEVICE_GEN_DRIVER_MAX_INSTANCES: The maximum number of Generic function driver instances to be supported.
The valid values are greater than or equal to 1. this constant is not defined the default value taken by the Generic function driver
is 1.
Data structures:
The application should form structure USB_DEVICE_GEN_DRIVER_INIT_INSTANCE. The structure takes pointers to the
following functions.
- A vendor defined initialize function that is called by the device layer when it initializes the generic function driver. This will
happen when the device layer process a SET CONFIGURATION command from the host.
- A vendor defined de-initialize function that is called by the device layer when it de-initializes the generic function driver. This will
happen when the device layer process a reset event or is required to change the configuration by the host.
- A vendor defined Setup packet handler. This function is called by the device layer when it needs to pass class specific control
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transfer to the generic function driver.
- A vendor specified tasks functions. This is called periodically by the device layer. This function can maintain a vendor device
state machine.
The application needs to define an array of USB_DEVICE_GEN_DRIVER_MAX_INSTANCES(defined by the application in
system_config.h) such structures. For example, if the application needs two instances of the Generic Device, then the size of this
array should be two.
Example: Creating the USB_DEVICE_GEN_DRIVER_INIT_INSTANCE structure.
USB_DEVICE_GEN_DRIVER_INIT_INSTANCE genUsbInitInstance[] =
{
{
.vendorSpecificInitialize = APP_Initialize,
.vendorSpecificDeInitialize = APP_DeInitialize,
.vendorSpecificSetupPacketHandler = APP_SetupPacketHandler,
.tasks = APP_Tasks
}
};
5.9.5.5.3 Client Setup
Note: To invoke any of the client setup routines listed in this section the device should be in configured state. Any
attempts invoking the client setup routines before the configured state will result in graceful exit.
Before using any of the USB Generic function driver services it needs to be setup once in the application.
Setting up the USB Generic function driver involves
1. Opening an instance of the USB Generic function driver.
2. Registering callback with the USB Generic function driver.
3. Closing an instance of the USB Generic function driver.
Opening an Instance of the USB GENERIC function driver:
Before attempting to use any of the USB Generic function driver services an instance of it needs to be opened by the application.
An instance of USB Generic function driver is defined as a group of minimum interfaces that constitute a Generic USB device.
To open an instance of USB Generic function driver application should call the function USB_DEVICE_GEN_DRIVER_Open.
Example: Opening a USB Generic instance
// Client Handle
DRV_HANDLE genHandle;
// open Generic USB device function driver instance 0
genHandle = USB_DEVICE_GEN_DRIVER_Open ( 0 );
// Check the validity of the handle returned
if(DRV_HANDLE_INVALID == genHandle)
{
\ Handle the error
}
Registering callback with the USB GENERIC function driver:
USB Generic function driver will inform the status of various events (both management and data) to the application using a
callback function registered with the USB Generic function driver.
This callback function should be registered with the function driver before expecting any event notifications.
There are three sources of generating events
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• Data transmission request ( USB_DEVICE_GEN_DRIVER_CALLBACK_TX_ )
• Data reception request ( USB_DEVICE_GEN_DRIVER_CALLBACK_RX )
• Management Requests ( USB_DEVICE_GEN_DRIVER_CALLBACK_MANAGEMENT )
Each of these requests will result in the generation of events of type USB_DEVICE_GEN_DRIVER_CALLBACK_TYPE
For a detailed list of events go through the above enum data type.
To register a callback with the Generic function driver application should first define a function of the signature
USB_DEVICE_GEN_DRIVER_CALLBACK_EVENT.
Once defined it can be registered with the Generic function driver using the function
USB_DEVICE_GEN_DRIVER_RegisterCallBack.
Example: Registering an application callback with the Generic function driver
// Application callback to handle relevant events.
void app_gen_CallBack ( SYS_MODULE_INDEX funcDriverIndex,
USB_DEVICE_GEN_DRIVER_CALLBACK_TYPE callback,
USB_DEVICE_GEN_DRIVER_CALLBACK_EVENT event)
{
switch (callback)
{
case USB_DEVICE_GEN_DRIVER_CALLBACK_TX:
break;
case USB_DEVICE_GEN_DRIVER_CALLBACK_RX:
break;
case USB_DEVICE_GEN_DRIVER_CALLBACK_MANAGEMENT:
break;
default:
break;
}
}
int main ()
{
DRV_HANDLE genHandle;
USB_ERROR_STATUS err;
// open the Generic USB device driver instance 0 ( or what ever is applicable)
genHandle = USB_DEVICE_GEN_DRIVER_Open ( 0 );
err = USB_DEVICE_GEN_DRIVER_RegisterCallBack (genHandle,app_gen_CallBack );
if(err)
{
//handle error
}
// app code
// Occurrance of any event of type USB_DEVICE_GEN_DRIVER_CALLBACK_EVENT results in
// calling of the registered application callback
return 0;
}
Closing an Instance of the USB Generic function driver:
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If at all the application wants to close an opened Generic function driver instance it can do so by calling the function
USB_DEVICE_GEN_DRIVER_Close. The application should pass the client handle it received with opened the Generic function
driver instance as the parameter. If the close is successful 0 is returned by the Generic to indicate success.
Example: Closing a Generic USB instance
// Return status
USB_ERROR_STATUS status;
// Close Generic USB device driver instance 0
status = USB_DEVICE_GEN_DRIVER_Close(0);
if(USB_ERROR_INVALID_HANDLE ==status)
{
// Generic USB device function driver instance 0 is either not opened/initialized yet
}
else if(status == USB_ERROR_OK)
{
// Generic USB device function driver instance 0 is successfully closed.
// app code
}
Before closing the Generic function driver instance the application should be aware of the following
1. Once an instance of the Generic function driver is closed the application cannot write to or read from the data end points(if
driven by Generic function driver).
2. The application will not get any event notifications .
INITIAL SETUP:
Before invoking any of the services offered by the Generic function driver following steps should have been completed
1. Certain key data structures need to be setup(initialized) by the application.
2. Certain system functions belonging to the MPLAB Harmony USB Device library should have been called.
3. The device should be in configured state.
The setup of the key data structures is explained in the Configuring the Library section. The following section focuses on the key
system functions that need to be called by the application before using Generic function driver.
The following diagram explains the sequence of system functions (belonging to the MPLAB Harmony USB Device library only)
invocations.
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Figure: System Initialization
Example: System initialization
// Populate USB Controller driver init data
usbInitData.usbID = USB_ID_1;
usbInitData.usbModuleSetup.OpMode = USB_OPMODE_DEVICE;
usbInitData.usbModuleSetup.ppMode = USB_PING_PONG_MODE_SELECTION;
usbInitData.usbModuleSetup.StopInIdle = false;
usbInitData.usbModuleSetup.SuspendInSleep = false;
// Initialize the USB Control driver
driverObjectHandle = DRV_USB_Initialize(DRV_USB_INDEX_0, (SYS_MODULE_INIT*)&usbInitData);
if (SYS_MODULE_OBJ_INVALID == driverObjectHandle)
{
// Handle error
}
// NOTE: USB controller driver is opened by both device layer and function driver and not by
the application.
// Populate USB Device layer init data
deviceLayerInit.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
deviceLayerInit.usbDriverIndex = DRV_USB_INDEX_0;
deviceLayerInit.usbMasterDescriptor = (USB_MASTER_DESCRIPTOR*)&usbMasterDescriptor;
deviceLayerInit.registeredFuncCount = 1;
deviceLayerInit.registeredFunctions =
(USB_DEVICE_FUNC_REGISTRATION_TABLE*)funcRegistrationTable;
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// Initialize the USB device layer
usbDeviceObj = USB_DEVICE_Initialize( USB_DEVICE_INDEX_0, (SYS_MODULE_INIT*)&deviceLayerInit );
// Open the device layer.
usbDevHandle = USB_DEVICE_Open( USB_DEVICE_INDEX_0 );
// Register a callback with device layer to get event notification (for end point 0)
USB_DEVICE_EventCallBackSet(usbDevHandle, usbDeviceEventCallBack);
The following example provides a complete Generic function driver setup. This example do not use separate functions to do
activities like system initialization, Generic function driver setup etc for the sake of clarity. It is recommended to use separate
functions to have a structured view of the project.
// Application callback to handle relevant events.
void app_gen_CallBack ( SYS_MODULE_INDEX funcDriverIndex,
USB_DEVICE_GEN_DRIVER_CALLBACK_TYPE callback,
USB_DEVICE_GEN_DRIVER_CALLBACK_EVENT event)
{
switch (callback)
{
case USB_DEVICE_GEN_DRIVER_CALLBACK_TX:
break;
case USB_DEVICE_GEN_DRIVER_CALLBACK_RX:
break;
case USB_DEVICE_GEN_DRIVER_CALLBACK_MANAGEMENT:
break;
default:
break;
}
}
// Device event callback of the application.
// This will be registered with the device layer
// during the system initialization.
void usbDeviceEventCallBack(USB_DEVICE_EVENTS events)
{
if(events.setConfiguration)
{
// Device is configured.
// Initialize function drivers.
isConfigured = true;
///////////////// Generic function driver Setup- Begin//////////////////////
DRV_HANDLE genHandle;
USB_ERROR_STATUS err;
// open the Generic USB device driver instance 0 ( or what ever is applicable)
genHandle = USB_DEVICE_GEN_DRIVER_Open ( 0 );
err = USB_DEVICE_GEN_DRIVER_RegisterCallBack (genHandle,app_gen_CallBack );
if(err)
{
//handle error
}
///////////////// Generic function driver Setup- End//////////////////////
}
}
int main ()
{
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// Device layer Init structure
USB_DEVICE_INIT deviceLayerInit;
// objects for Controller driver and device layer (returned by init routines)
SYS_MODULE_OBJ driverObjectHandle, usbDeviceObj;
// Client handle
DRV_HANDLE genHandle;
// Client handle for device layer
DRV_HANDLE usbDevHandle;
// USB controller driver init data
DRV_USB_INIT usbInitData;
///////////////// system initialization- Begin//////////////////////
// Populate USB Controller driver init data
usbInitData.usbID = USB_ID_1;
usbInitData.usbModuleSetup.OpMode = USB_OPMODE_DEVICE;
usbInitData.usbModuleSetup.ppMode = USB_PING_PONG_MODE_SELECTION;
usbInitData.usbModuleSetup.StopInIdle = false;
usbInitData.usbModuleSetup.SuspendInSleep = false;
// Initialize the USB Control driver
driverObjectHandle = DRV_USB_Initialize(DRV_USB_INDEX_0, (SYS_MODULE_INIT*)&usbInitData);
if (SYS_MODULE_OBJ_INVALID == driverObjectHandle)
{
// Handle error
}
// NOTE: USB controller driver is opened by both device layer and
// function driver and not by the application.
// Populate USB Device layer init data
deviceLayerInit.moduleInit.value = SYS_MODULE_POWER_RUN_FULL;
deviceLayerInit.usbDriverIndex = DRV_USB_INDEX_0;
deviceLayerInit.usbMasterDescriptor = (USB_MASTER_DESCRIPTOR*)&usbMasterDescriptor;
deviceLayerInit.registeredFuncCount = 1;
deviceLayerInit.registeredFunctions =
(USB_DEVICE_FUNC_REGISTRATION_TABLE*)funcRegistrationTable;
// Initialize the USB device layer
usbDeviceObj = USB_DEVICE_Initialize( USB_DEVICE_INDEX_0, (SYS_MODULE_INIT*)&deviceLayerInit
);
// Open the device layer.
usbDevHandle = USB_DEVICE_Open( USB_DEVICE_INDEX_0 );
// Register a callback with device layer to get event notification (for end point 0)
USB_DEVICE_EventCallBackSet(usbDevHandle, usbDeviceEventCallBack);
///////////////// system initialization- End//////////////////////
// the application body
while(1)
{
// Device layer task
USB_DEVICE_Tasks(usbDeviceObj);
// Check if the enumeration is complete
if(isConfigured)
{
// Start calling application tasks
}
}
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return 0;
}
5.9.5.5.4 Client Data Handling
The USB Generic function driver provides APIs to handle data to/from the host. The following section provides the usage of
these APIs.
The data transfer in the Generic function driver happens over the end points with all the type of transfer modes (BULK,
ISOCHRONOUS, INTERRUPT) at both direction of IN and OUT.
The following sections focus on the data transmission over the end points .
The read and write naming conventions used for the data handling APIs are from the device point of view. So
USB_DEVICE_GEN_DRIVER_ReadEp function is a request to the MPLAB Harmony USB Device library to get data available
from the host. Similarly USB_DEVICE_GEN_DRIVER_WriteEp function is a request to make data available to the host.
Generic USB Buffer Objects:
In order place a read/write request with the Generic function driver the application should first create a buffer object of the type
USB_DEVICE_GEN_DRIVER_DATA_BUFFER_OBJECT. It is recommended to create separate buffer objects for read and
write operations. A USB_DEVICE_GEN_DRIVER_DATA_BUFFER_OBJECT contains a pointer to the data buffer, length of the
buffer and transfer count. The transfer count is updated by the Generic function driver (after the read/write request is submitted)
to indicate the actual amount of data transferred to/from the host.
Example: Generic USB DATA Buffer Object Creation
// buffer for read operation of size 64 bytes
uint8_t inBuffer[64];
// define and initialize the buffer object
USB_DEVICE_GEN_DRIVER_DATA_BUFFER_OBJECT inBufferObject = {(uint8_t*)&inBuffer, 64, 0};
Read From the Host:
As explained above the application should make use of the API USB_DEVICE_GEN_DRIVER_ReadEp to get data from the
host. Before placing a read request with the Generic function driver the application should get the pipeHandle using
USB_DEVICE_GEN_DRIVER_GetPipeHandle . If the received is valid , applicatio has to check if it can place the next read
request. This status can be obtained using the API USB_DEVICE_GEN_DRIVER_TxRx_StatusGet. If this API returns
USB_DEVICE_GEN_DRIVER_INSTANCE_RX_READY then the application can place a request for a read operation. If the
received status is anything else then the application should poll until the receive status is ready. The following example shows
the usage of read request.
Example: Data Read Request
#define APP_USB_DEVICE_GEN_DRIVER_FUNC_INDEX 0
// create buffer
uint8_t outBuffer[64];
uint8_t datalen = 64;
uint8_t epNum = 1;
dirn = USB_DEVICE_GEN_DRIVER_EP_IN_INDEX; //OUT:(0x00) or IN: 0x01)
DRV_HANDLE genHandle,pipeHandle;
USB_ERROR_STATUS genErr;
//create the buffer object with datalength 64
USB_DEVICE_GEN_DRIVER_DATA_BUFFER_OBJECT readBufferObject = {&outBuffer, 64, 0};
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// open the Generic USB device driver instance 0 ( or what ever is applicable)
genHandle = USB_DEVICE_GEN_DRIVER_Open ( APP_USB_DEVICE_GEN_DRIVER_FUNC_INDEX );
if(USB_DEVICE_GEN_DRIVER_RegisterCallBack (genHandle,app_gen_CallBack ))
{
//handle error
}
//Get the pipe handle for the endpoint
pipeHandle = USB_DEVICE_GEN_DRIVER_GetPipeHandle(genHandle, epNum, dirn))
if ( DRV_HANDLE_INVALID == pipeHandle)
{
//The request was not successful
}
//Got the pipe handle for the endpoint
//Pass the pipe handle to USB_DEVICE_GEN_DRIVER_ReadEp
genErr = USB_DEVICE_GEN_DRIVER_ReadEp( pipeHandle,&readBufferObject);
if(USB_ERROR_OK != genErr)
{
//Read request is not accepted.
}
If the application has registered a callback function with the Generic function driver then any events related to the read request
will be informed to the application via this callback. In the callback the application can check whether all of the data requested is
received. The following example shows this.
Example: Data Read Request with application callback
#define APP_USB_DEVICE_GEN_DRIVER_FUNC_INDEX 0
// Application callback to handle relevant events.
void app_gen_CallBack ( SYS_MODULE_INDEX funcDriverIndex,
USB_DEVICE_GEN_DRIVER_CALLBACK_TYPE callback,
USB_DEVICE_GEN_DRIVER_CALLBACK_EVENT event)
{
switch (callback)
{
case USB_DEVICE_GEN_DRIVER_CALLBACK_TX:
break;
case USB_DEVICE_GEN_DRIVER_CALLBACK_RX:
if (readBufferObject.transferCount == readBufferObject.dataLen)
{
//entire data is read from the host.
}
else
{
//some of the data is not read.
//get some logic in place to handle this
}
break;
case USB_DEVICE_GEN_DRIVER_CALLBACK_MANAGEMENT:
break;
default:
break;
}
}
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int main ()
{
// create buffer
uint8_t outBuffer[64];
uint8_t datalen = 64;
uint8_t epNum = 1;
dirn = USB_DEVICE_GEN_DRIVER_EP_OUT_INDEX; //OUT:(0x00) or IN: 0x01)
DRV_HANDLE genHandle;
USB_ERROR_STATUS genErr;
DRVHANDLE pipeHandle;
//create the buffer object with datalength 64
USB_DEVICE_GEN_DRIVER_DATA_BUFFER_OBJECT readBufferObject = {&outBuffer, 64, 0};
// open the Generic USB device driver instance 0 ( or what ever is applicable)
genHandle = USB_DEVICE_GEN_DRIVER_Open ( 0 );
if(USB_DEVICE_GEN_DRIVER_RegisterCallBack (genHandle,app_gen_CallBack ))
{
//handle error
}
//Get the pipe handle for the endpoint
pipeHandle = USB_DEVICE_GEN_DRIVER_GetPipeHandle(genHandle, epNum, dirn))
if ( DRV_HANDLE_INVALID == pipeHandle)
{
//The request was not successful
}
//we got the pipe handle for the endpoint
//Pass the pipe handle to USB_DEVICE_GEN_DRIVER_ReadEp
genErr = USB_DEVICE_GEN_DRIVER_ReadEp( pipeHandle,&readBufferObject);
if(USB_ERROR_OK == genErr)
{
//read request is accepted
//if app callback is registered, rest needs to be handled
//in the appcallback, which is called by the Generic USB device function
//driver when it is intimated by the device layer about
//the transfer.
}
else
{
// something wrong in the read request
// handle the error case
switch ( genErr )
{
case USB_ERROR_INVALID_HANDLE:
break;
case USB_ERROR_INVALID_BUFFER:
break;
case USB_ERROR_BUSY:
break;
}
}
return 0;
}
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The read request code flow can be better understood with the following diagram.
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Write to the Host:
The application should make use of the API USB_DEVICE_GEN_DRIVER_WriteEp to get transfer data to the host. Before
placing a write request with the Generic function driver the application should the application should get the pipeHandle using
USB_DEVICE_GEN_DRIVER_GetPipeHandle . If the received is valid , application has tocheck if it can place the next write
request. This status can be obtained using the API USB_DEVICE_GEN_DRIVER_TxRx_StatusGet. If this API returns
USB_DEVICE_GEN_DRIVER_INSTANCE_TX_READY then the application can place a request for a write operation. If the
received status is anything else then the application should poll until the transmit status is ready.The following example shows
the usage of read request.
Example: Data Read Request
#define APP_USB_DEVICE_GEN_DRIVER_FUNC_INDEX 0
// create buffer. Assuming data end-point max packet size is 64 bytes.
uint8_t inBuffer[64] ;
uint8_t datalen = 64;
uint8_t epNum = 1;
uint8_t dirn = USB_DEVICE_GEN_DRIVER_EP_IN_INDEX;// OUT :0x00 or IN : 0x01
DRV_HANDLE pipeHandle,genHandle;
//create the buffer object with datalength 64
USB_DEVICE_GEN_DRIVER_DATA_BUFFER_OBJECT writeBufferObject = {&inBuffer, 64, 0};
//open the Generic USB device driver instance 0 ( or what ever is applicable)
genHandle = USB_DEVICE_GEN_DRIVER_DRIVER_Open (APP_USB_DEVICE_GEN_DRIVER_FUNC_INDEX);
if(USB_DEVICE_GEN_DRIVER_DRIVER_RegisterCallBacks (genHandle,app_gen_CallBack ))
{
//handle error
}
//Get the pipe handle for the endpoint
pipeHandle = USB_DEVICE_GEN_DRIVER_GetPipeHandle(genHandle, epNum, dirn))
if ( DRV_HANDLE_INVALID == pipeHandle)
{
//The request was not successful.
}
//we got the pipe handle for the endpoint
//Pass the pipe handle to USB_DEVICE_GEN_DRIVER_WriteEp
genErr = USB_DEVICE_GEN_DRIVER_WriteEp( pipeHandle,&writeBufferObject);
if(USB_ERROR_OK != genErr)
{
//write request is not accepted
}
If the application has registered a callback function with the Generic function driver then any events related to the write request
will be informed to the application via this callback. In the callback the application can check whether all of the data requested is
transmitted. The following example shows this.
Example: Data Read Request with application callback
#define APP_USB_DEVICE_GEN_DRIVER_FUNC_INDEX 0
// Application callback to handle relevant events.
void app_gen_CallBack ( SYS_MODULE_INDEX funcDriverIndex,
USB_DEVICE_GEN_DRIVER_CALLBACK_TYPE callback,
USB_DEVICE_GEN_DRIVER_CALLBACK_EVENT event)
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{
switch (callback)
{
case USB_DEVICE_GEN_DRIVER_CALLBACK_TX:
if (writeBufferObject.transferCount == writeBufferObject.dataLen)
{
//entire data is written to host.
}
else
{
//some of the data is not sent to the host.
//think and get some logic in place to handle this
}
break;
case USB_DEVICE_GEN_DRIVER_CALLBACK_RX:
break;
case USB_DEVICE_GEN_DRIVER_CALLBACK_MANAGEMENT:
break;
default:
break;
}
}
int main ()
{
// create buffer. Assuming data end-point max packet size is 64 bytes.
uint8_t inBuffer[64] ;
uint8_t datalen = 64;
uint8_t epNum = 1;
uint8_t dirn = USB_DEVICE_GEN_DRIVER_EP_OUT_INDEX;// OUT :0x00 or IN : 0x01
DRV_HANDLE pipeHandle,genHandle;
//create the buffer object with datalength 64
USB_DEVICE_GEN_DRIVER_DATA_BUFFER_OBJECT writeBufferObject = {&inBuffer, 64, 0};
//open the Generic USB device driver instance 0 ( or what ever is applicable)
genHandle = USB_DEVICE_GEN_DRIVER_DRIVER_Open ( 0 );
if(USB_DEVICE_GEN_DRIVER_DRIVER_RegisterCallBacks (genHandle,app_gen_CallBack ))
{
//handle error
}
//Get the pipe handle for the endpoint
pipeHandle = USB_DEVICE_GEN_DRIVER_GetPipeHandle(genHandle, epNum, dirn))
if ( DRV_HANDLE_INVALID == pipeHandle)
{
//The request was not successful.
}
//we got the pipe handle for the endpoint
//Pass the pipe handle to USB_DEVICE_GEN_DRIVER_WriteEp
genErr = USB_DEVICE_GEN_DRIVER_WriteEp( pipeHandle,&writeBufferObject);
if(USB_ERROR_OK != genErr)
{
//write request is not accepted
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}
return 0;
}
The write request code flow can be better understood with the following diagram.
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5.9.5.5.5 Client Subclass Specific
This section details the vendor specific sub-class specific requests and notifications handled by the Generic function driver.
5.9.5.6 Library Interface
Data Types and Constants
Name Description
USB_DEVICE_GENERIC_EVENT This is type
USB_DEVICE_GENERIC
_EVENT.
USB_DEVICE_GENERIC_EVENT_DATA Union that holds event
data for different generic
driver events.
USB_DEVICE_GENERIC_EVENT_DATA_CONTROL_TRANSFER_SETUP_REQUEST The data-type that holds
the event data
associated with
USB_DEVICE_GENERIC
_EVENT_DATA_CONTR
OL_TRANSFER_SETUP
_REQUEST
event.
USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_READ_COMPLETE The data-type that holds
the event data
associated with
USB_DEVICE_GENERIC
_EVENT_ENDPOINT_R
EAD_COMPLETE
event.
USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_WRITE_COMPLETE The data-type that holds
the event data
associated with
USB_DEVICE_GENERIC
_EVENT_ENDPOINT_W
RITE_COMPLETE
event.
USB_DEVICE_GENERIC_EVENT_HANDLER The data-type that
defines the signature of
the event callback
function.
USB_DEVICE_GENERIC_EVENT_RESPONSE The return type of the
application callback
function.
USB_DEVICE_GENERIC_INDEX Data-type for USB
device generic driver
index.
USB_DEVICE_GENERIC_RESULT The enumerated
data-type that idnetifies
the possible result of an
operation.
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USB_DEVICE_GENERIC_TRANSFER_FLAG Enumerated data-type
that identifies the USB
device generic function
driver's transfer flag.
USB_DEVICE_GENERIC_TRANSFER_HANDLE Data-type of the generic
driver transfer handle.
Functions
Name Description
USB_DEVICE_GENERIC_EndpointIsEnabled This function returns true if the requested endpoint is enabled.
USB_DEVICE_GENERIC_EndpointRead Reads data received from host on the requested endpoint.
USB_DEVICE_GENERIC_EndpointStall This function stalls the requested endpoint.
USB_DEVICE_GENERIC_EndpointStallClear Clears STALL on the endpoint.
USB_DEVICE_GENERIC_EndpointStallStatusGet USB Generic function driver library function that returns true if
STALL is enabled on the endpoint.
USB_DEVICE_GENERIC_EndpointWrite This function allows the application client to transfer data from
device to host on the requested endpoint.
USB_DEVICE_GENERIC_EventHandlerSet This function allows the application client to register event
handler callback with the generic function driver library.
Description
This section describes the Application Programming Interface (API) functions of the USB Generic Device Library.
Refer to each section for a detailed description.
5.9.5.6.1 Functions
5.9.5.6.1.1 USB_DEVICE_GENERIC_EndpointIsEnabled Function
C
bool USB_DEVICE_GENERIC_EndpointIsEnabled(
USB_DEVICE_GENERIC_INDEX iGEN,
USB_ENDPOINT endpoint
);
Preconditions
USB device layer be initialized.
Parameters
Parameters Description
iGEN USB generic driver function driver instance ID.
endpoint endpoint address.
Returns
true if endpoint is enabled.
Remarks
None.
Example
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5.9.5.6.1.2 USB_DEVICE_GENERIC_EndpointRead Function
C
USB_DEVICE_GENERIC_RESULT USB_DEVICE_GENERIC_EndpointRead(
USB_DEVICE_GENERIC_INDEX iGEN,
USB_DEVICE_GENERIC_TRANSFER_HANDLE * transferHandle,
USB_ENDPOINT endpoint,
uint8_t * buffer,
size_t bufferSize
);
Preconditions
USB device layer be initialized.
Parameters
Parameters Description
iGEN USB generic function driver instance ID.
transferHandle Pointer to transfer handle.
endpoint endpoint address
buffer Buffer pointer
bufferSize Buffer size
Returns
See USB_DEVICE_GENERIC_RESULT.
Remarks
None.
Example
5.9.5.6.1.3 USB_DEVICE_GENERIC_EndpointStall Function
C
USB_DEVICE_GENERIC_RESULT USB_DEVICE_GENERIC_EndpointStall(
USB_DEVICE_GENERIC_INDEX iGEN,
USB_ENDPOINT endpoint
);
Preconditions
USB device layer must be initialized.
Parameters
Parameters Description
iGEN USB device generic function driver instance ID.
endpoint Endpoint address.
Returns
See USB_DEVICE_GENERIC_RESULT
Remarks
None.
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Example
5.9.5.6.1.4 USB_DEVICE_GENERIC_EndpointStallClear Function
C
USB_DEVICE_GENERIC_RESULT USB_DEVICE_GENERIC_EndpointStallClear(
USB_DEVICE_GENERIC_INDEX iGEN,
USB_ENDPOINT endpoint
);
Preconditions
USB device layer be initialized.
Parameters
Parameters Description
iGEN Generic driver instance index.
endpoint Endpoint address for which the stall has to be cleared.
Returns
See USB_DEVICE_GENERIC_RESULT.
Remarks
None.
Example
5.9.5.6.1.5 USB_DEVICE_GENERIC_EndpointStallStatusGet Function
C
bool USB_DEVICE_GENERIC_EndpointStallStatusGet(
USB_DEVICE_GENERIC_INDEX iGEN,
USB_ENDPOINT endpoint
);
Preconditions
USB device layer be initialized.
Parameters
Parameters Description
iGEN USB generic function driver instance ID.
endpoint endpoint address.
Returns
true if endpoint is stalled.
Remarks
None.
Example
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5.9.5.6.1.6 USB_DEVICE_GENERIC_EndpointWrite Function
C
USB_DEVICE_GENERIC_RESULT USB_DEVICE_GENERIC_EndpointWrite(
USB_DEVICE_GENERIC_INDEX iGEN,
USB_DEVICE_GENERIC_TRANSFER_HANDLE * transferHandle,
USB_ENDPOINT endpoint,
uint8_t * buffer,
size_t bufferSize,
USB_DEVICE_GENERIC_TRANSFER_FLAG flags
);
Preconditions
USB device layer be initialized.
Parameters
Parameters Description
iGEN USB generic function driver instance ID.
transferHandle Pointer to transfer handle.
endpoint endpoint address
buffer Buffer pointer
bufferSize Buffer size
flags Flag that specifies this function whether to end the transfer with a short packet or
not.
Returns
See USB_DEVICE_GENERIC_RESULT.
Remarks
None.
Example
5.9.5.6.1.7 USB_DEVICE_GENERIC_EventHandlerSet Function
C
USB_DEVICE_GENERIC_RESULT USB_DEVICE_GENERIC_EventHandlerSet(
USB_DEVICE_GENERIC_INDEX iGEN,
USB_DEVICE_GENERIC_EVENT_HANDLER eventHandler,
uintptr_t userData
);
Preconditions
USB device layer be initialized.
Parameters
Parameters Description
instanceIndex USB Generic function driver instance ID.
eventHandler Pointer to application event handler callback function.
Returns
See USB_DEVICE_GENERIC_RESULT.
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Remarks
None.
Example
5.9.5.6.2 Data Types and Constants
5.9.5.6.2.1 USB_DEVICE_GENERIC_EVENT Enumeration
C
typedef enum {
USB_DEVICE_GENERIC_EVENT_CONTROL_TRANSFER_SETUP_REQUEST,
USB_DEVICE_GENERIC_EVENT_CONTROL_TRANSFER_DATA_RECEIVED,
USB_DEVICE_GENERIC_EVENT_CONTROL_TRANSFER_DATA_SENT,
USB_DEVICE_GENERIC_EVENT_CONTROL_TRANSFER_ABORTED,
USB_DEVICE_GENERIC_EVENT_ENDPOINT_WRITE_COMPLETE,
USB_DEVICE_GENERIC_EVENT_ENDPOINT_READ_COMPLETE
} USB_DEVICE_GENERIC_EVENT;
Description
This is type USB_DEVICE_GENERIC_EVENT.
Members
Members Description
USB_DEVICE_GENERIC_EVENT_CONTROL_TRANSFER_SETUP_REQUEST Control transfer data stage is received from
host to device
USB_DEVICE_GENERIC_EVENT_CONTROL_TRANSFER_DATA_RECEIVED Control transfer data stage is received from
host to device
USB_DEVICE_GENERIC_EVENT_CONTROL_TRANSFER_DATA_SENT Control transfer data stage is transmitted
from device to host
5.9.5.6.2.2 USB_DEVICE_GENERIC_EVENT_DATA Union
C
typedef union {
USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_WRITE_COMPLETE endpointWriteComplete;
USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_READ_COMPLETE endpointReadComplete;
USB_DEVICE_GENERIC_EVENT_DATA_CONTROL_TRANSFER_SETUP_REQUEST * ptrSetupRequest;
} USB_DEVICE_GENERIC_EVENT_DATA;
Description
Event Data.
Members
Members Description
USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_WRITE_COMPLETE
endpointWriteComplete;
Data associated with
USB_DEVICE_GENERIC_EVENT_E
NDPOINT_WRITE_COMPLETE
event
USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_READ_COMPLETE
endpointReadComplete;
Data associated with
USB_DEVICE_GENERIC_EVENT_E
NDPOINT_READ_COMPLETE
event
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USB_DEVICE_GENERIC_EVENT_DATA_CONTROL_TRANSFER_SETUP_REQUEST
* ptrSetupRequest;
Data associated with
USB_DEVICE_GENERIC_EVENT_D
ATACONTROL
Remarks
None.
5.9.5.6.2.3
USB_DEVICE_GENERIC_EVENT_DATA_CONTROL_TRANSFER_SETUP_REQUEST
Structure
C
typedef struct {
uint8_t bmRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
} USB_DEVICE_GENERIC_EVENT_DATA_CONTROL_TRANSFER_SETUP_REQUEST;
Description
Data assocated with USB_DEVICE_GENERIC_EVENT_DATA_CONTROL_TRANSFER_SETUP_REQUEST event.
Members
Members Description
uint8_t bmRequestType; Format of setup packet from table 9-2 of USB 2.0 spec
Remarks
None.
5.9.5.6.2.4 USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_READ_COMPLETE
Structure
C
typedef struct {
unsigned int dataSize;
uint8_t * data;
USB_DEVICE_IRP_STATUS status;
USB_DEVICE_GENERIC_TRANSFER_HANDLE transferHandle;
} USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_READ_COMPLETE;
Description
Data assocated with USB_DEVICE_GENERIC_EVENT_ENDPOINT_READ_COMPLETE event.
Members
Members Description
unsigned int dataSize; data size received
uint8_t * data; Pointer to data buffer
USB_DEVICE_IRP_STATUS status; Status
USB_DEVICE_GENERIC_TRANSFER_HANDLE
transferHandle;
Transfer handle
Remarks
None.
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5.9.5.6.2.5 USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_WRITE_COMPLETE
Structure
C
typedef struct {
unsigned int dataSize;
uint8_t * data;
USB_DEVICE_IRP_STATUS status;
USB_DEVICE_GENERIC_TRANSFER_HANDLE transferHandle;
} USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_WRITE_COMPLETE;
Description
Data assocated with USB_DEVICE_GENERIC_EVENT_ENDPOINT_WRITE_COMPLETE event.
Members
Members Description
unsigned int dataSize; data size transmitted
uint8_t * data; Pointer to data buffer
USB_DEVICE_IRP_STATUS status; Status
USB_DEVICE_GENERIC_TRANSFER_HANDLE
transferHandle;
Transfer handle
Remarks
None.
5.9.5.6.2.6 USB_DEVICE_GENERIC_EVENT_HANDLER Type
C
typedef USB_DEVICE_GENERIC_EVENT_RESPONSE (*
USB_DEVICE_GENERIC_EVENT_HANDLER)(USB_DEVICE_GENERIC_INDEX instanceIndex,
USB_DEVICE_CONTROL_TRANSFER_HANDLE controlTransferHandle, USB_DEVICE_GENERIC_EVENT event,
USB_DEVICE_GENERIC_EVENT_DATA * eventData, uintptr_t userData);
Description
USB device generic function driver event handle.
The application provided event callback function must be of this data-type.
Remarks
None.
5.9.5.6.2.7 USB_DEVICE_GENERIC_EVENT_RESPONSE Type
C
typedef void USB_DEVICE_GENERIC_EVENT_RESPONSE;
Description
Return type of the application callback function.
Remarks
Also see, USB_DEVICE_GENERIC_EVENT_HANDLER
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5.9.5.6.2.8 USB_DEVICE_GENERIC_INDEX Type
C
typedef SYS_MODULE_INDEX USB_DEVICE_GENERIC_INDEX;
Description
Data-type for USB device generic driver index.
Remarks
None.
5.9.5.6.2.9 USB_DEVICE_GENERIC_RESULT Enumeration
C
typedef enum {
USB_DEVICE_GENERIC_RESULT_QUEUE_FULL,
USB_DEVICE_GENERIC_RESULT_OK,
USB_DEVICE_GENERIC_RESULT_ENDPOINT_NOT_CONFIGURED,
USB_DEVICE_GENERIC_RESULT_PARAMETER_INVALID
} USB_DEVICE_GENERIC_RESULT;
Description
Possible results of Generic Driver operations.
Members
Members Description
USB_DEVICE_GENERIC_RESULT_QUEUE_FULL Queue is full
USB_DEVICE_GENERIC_RESULT_OK No Error
USB_DEVICE_GENERIC_RESULT_ENDPOINT_NOT_CONFIGURED Endpoint not configured
USB_DEVICE_GENERIC_RESULT_PARAMETER_INVALID One or more parameter/s of the function is invalid
Remarks
None.
5.9.5.6.2.10 USB_DEVICE_GENERIC_TRANSFER_FLAG Enumeration
C
typedef enum {
USB_DEVICE_GENERIC_TRANSFER_FLAG_NONE,
USB_DEVICE_GENERIC_TRANSFER_FLAG_DATA_COMPLETE
} USB_DEVICE_GENERIC_TRANSFER_FLAG;
Description
USB device generic function driver transfer flags.
Members
Members Description
USB_DEVICE_GENERIC_TRANSFER_FLAG_NONE Transfer flag that specifies no special request
USB_DEVICE_GENERIC_TRANSFER_FLAG_DATA_COMPLETE Transfer flag that specifies the generic driver to complete
the transfer
Remarks
Also see, USB_DEVICE_GENERIC_EndpointWrite
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5.9.5.6.2.11 USB_DEVICE_GENERIC_TRANSFER_HANDLE Type
C
typedef uintptr_t USB_DEVICE_GENERIC_TRANSFER_HANDLE;
Description
Generic driver transfer handle.
Remarks
Also see, USB_DEVICE_GENERIC_EndpointRead USB_DEVICE_GENERIC_EndpointWrite
5.9.5.7 Files
Files
Name Description
usb_device_generic.h Generic USB device function driver header
Description
5.9.5.7.1 usb_device_generic.h
Generic USB device function driver header file
Generic USB device function driver header file
Enumerations
Name Description
USB_DEVICE_GENERIC_EVENT This is type USB_DEVICE_GENERIC_EVENT.
USB_DEVICE_GENERIC_RESULT The enumerated data-type that idnetifies the possible result of an
operation.
USB_DEVICE_GENERIC_TRANSFER_FLAG Enumerated data-type that identifies the USB device generic
function driver's transfer flag.
Functions
Name Description
USB_DEVICE_GENERIC_EndpointIsEnabled This function returns true if the requested endpoint is enabled.
USB_DEVICE_GENERIC_EndpointRead Reads data received from host on the requested endpoint.
USB_DEVICE_GENERIC_EndpointStall This function stalls the requested endpoint.
USB_DEVICE_GENERIC_EndpointStallClear Clears STALL on the endpoint.
USB_DEVICE_GENERIC_EndpointStallStatusGet USB Generic function driver library function that returns true if
STALL is enabled on the endpoint.
USB_DEVICE_GENERIC_EndpointWrite This function allows the application client to transfer data from
device to host on the requested endpoint.
USB_DEVICE_GENERIC_EventHandlerSet This function allows the application client to register event
handler callback with the generic function driver library.
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Structures
Name Description
USB_DEVICE_GENERIC_EVENT_DATA_CONTROL_TRANSFER_SETUP_REQUEST The data-type that holds
the event data
associated with
USB_DEVICE_GENERIC
_EVENT_DATA_CONTR
OL_TRANSFER_SETUP
_REQUEST
event.
USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_READ_COMPLETE The data-type that holds
the event data
associated with
USB_DEVICE_GENERIC
_EVENT_ENDPOINT_R
EAD_COMPLETE
event.
USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_WRITE_COMPLETE The data-type that holds
the event data
associated with
USB_DEVICE_GENERIC
_EVENT_ENDPOINT_W
RITE_COMPLETE
event.
Types
Name Description
USB_DEVICE_GENERIC_EVENT_HANDLER The data-type that defines the signature of the event callback
function.
USB_DEVICE_GENERIC_EVENT_RESPONSE The return type of the application callback function.
USB_DEVICE_GENERIC_INDEX Data-type for USB device generic driver index.
USB_DEVICE_GENERIC_TRANSFER_HANDLE Data-type of the generic driver transfer handle.
Unions
Name Description
USB_DEVICE_GENERIC_EVENT_DATA Union that holds event data for different generic driver events.
File Name
usb_device_generic.h
Company
Microchip Technology Inc.
5.9.6 USB HID Device Library
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5.9.6.1 Introduction
Introduces the MPLAB Harmony USB Device HID Library
Description
This library provides a high-level abstraction of the Human Interface Devices (HID) class under the Universal Serial Bus (USB)
communication with a convenient C language interface. This library supports revision 1.11 of the USB HID specification release
by the USB Implementers forum. This library is part of the MPLAB Harmony USB Device stack.
USB Human Interface Devices class (or USB HID) supports class of devices that are used by humans to control the operation of
computer systems. The HID class of devices include a wide variety of human interface, data indicator, data feedback devices
with various types of outputs directed to the end user. Some common examples of HID class devices include:
• Keyboards
• Pointing devices such as standard mouse, joysticks, trackballs
• Front-panel controls like knobs, switches, buttons, sliders
• Controls found on telephony, gaming or simulation devices like steering wheels, rudder pedals, dial pads
• Data devices such as bar-code scanners, thermometers, analyzers
The USB Device HID library ( also referred to as HID function driver in this document) offers services to the application to
interact and respond to the host requests. Additional information about the HID class can be obtained from the HID specification
available www.usbif.org.
5.9.6.2 Release Notes
MPLAB Harmony Version: v0.70b USB HID Device Library Version : 0.01 Alpha Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.9.6.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
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paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.9.6.4 Library Architecture
5.9.6.4.1 Architecture Overview
Provides an Architectural Overview of the HID Function Driver
Description
The HID Function Driver offers services to a USB HID device to communicate with the host by abstracting the HID specification
details. It must be used along with the USB Device layer and USB controller to communicate with the USB host. Figure 1 shows
a block diagram representation of the MPLAB Harmony USB Architecture and where the USB HID Function Driver is placed.
Figure 1: USB HID Function Driver
The HID function driver together with USB Device layer and USB controller driver forms the basic library entity through which a
HID device can communicate with the USB host. The USB controller driver takes the responsibility of managing the USB
peripheral on the device. The USB device layer handles the device enumeration etc. The USB Device layer forwards all HID
specific control transfers to the HID Function Driver. The HID Function Driver interprets the control transfers and requests
application's intervention through event handlers and well defined set of API. The application must register a event handler with
the HID function driver in the Device Layer Set Configuration Event. While the application must respond to the HID function
driver events, it can do this either in the event handler or out of it. The application interacts with HID Function Driver routines to
send and receive HID reports over the USB.
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Figure 2 : Architecture of the HID function driver.
Figure 2 shows the architecture of the HID function Driver. The function driver maintains the state of each instance. It receives
HID class specific control transfers from the Device Layer. Class specific control transfers that require application response are
forwarded to the application as function driver events. Depending on the type of device, the HID function driver can use the
control endpoint and/or interrupt endpoints for data transfers. The HID device exchanges data with host through data objects
called reports. The report data format is described by the HID report descriptor which is provided to the host when requested.
Refer to the HID specification available www.usb.org for more details on the USB HID device class and how reports descriptors
can be created. The HID function driver allows report descriptors to be specified for every instance. This allow the application to
implement a composite HID device.
5.9.6.5 Using the Library
5.9.6.5.1 Files to Include
Describes which files to include in project while using the HID Function Driver
Description
Table 1 shows the files that must be included in the project in order to use the HID Function Driver. These files are located in the
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framework folder of the MPLAB Harmony installation. It is assumed that the Device Layer files ( and the files needed by the
Device Layer) are already included in the project.
Filename Description
\framework\usb\src\dynamic\usb_device_hid.c Contains the HID Control Interface and Data Interface management routines
\framework\usb\usb_device_hid.h Must included in every source file that needs to invoke HID function driver API.
system_config.h User created file which contains the HID function driver configuration.
Table 1: Files to be included in USB CDC Device Project.
5.9.6.5.2 Library Configuration
Describes how to configure the HID Function Driver
Description
The following configuration parameters must be defined while using the HID Function Driver. The configuration macros that
implement these parameters must be located in the system_config.h file in the application project and a compiler include path (to
point to the folder that contains this file) should be specified.
Configuration Macro Name Description Comments
USB_DEVICE_HID_MAX_INSTANCES Number of
HID
Function
Driver
Instances
in the
application
This macro defines the number of instances of the HID Function Driver.
For example, if the application needs to implement two instances of the
HID Function Driver (for example to create a mouse + keyboard device)
on one USB Device, the macro
USB_DEVICE_HID_INSTANCES_NUMBER should be set to 2. Note
that implementing a USB Device that features multiple HID interfaces
requires appropriate USB configuration descriptors.
USB_DEVICE_HID_QUEUE_SIZE HID
Function
Driver
Buffer
Queue
Combined
size
This macro defines the number of entries in all queues in all instances
of the HID function driver. This value can be obtained by adding up the
read and write queue sizes of each HID Function driver instance. In a
simple single instance USB HID device application, that does not
require buffer queuing , the
USB_DEVICE_HID_QUEUE_DEPTH_COMBINED macro can be set to
2. Consider a case with two HIDfunction driver instances, CDC 1 has a
read queue size of 2 and write queue size of 3, HID 2 has a read queue
size of 4 and write queue size of 1, this macro should be set to 10 (2 +3
+ 4 + 1).
5.9.6.5.3 Library Initialization
Describes how the HID Function Driver is initialized.
Description
The HID function driver instance for a USB device configuration is initialized by the Device Layer when the configuration is set by
the host. This process does not require application intervention. Each instance of the HID function driver should be registered
with the Device layer through the Device Layer Function Driver Registration Table. The HID function driver requires a
initialization data structure that contains details about the report descriptor associated with the specific instance of the HID
function driver. The hidFuncDriver object is a global object provided by the HID function driver and points to the HID function
driver - Device Layer interface functions which are required by the Device Layer. The code snippet below shows an example of
how a HID function driver instance (implementing a USB HID Mouse) can be registered with the Device Layer.
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/* This code snippet shows an example of registering a HID function driver
* with the Device Layer. While registering the function driver, an initialization
* data structure must be specified. In this example, hidInit is the HID function
* driver initialization data structure. */
/* This hid_rpt01 report descriptor describes a 3 button 2
* axis mouse pointing device */
const uint8_t hid_rpt01[]=
{
0x06, 0x00, 0xFF, // Usage Page = 0xFF00 (Vendor Defined Page 1)
0x09, 0x01, // Usage (Vendor Usage 1)
0xA1, 0x01, // Collection (Application)
0x19, 0x01, // Usage Minimum
0x29, 0x40, // Usage Maximum //64 input usages total (0x01 to 0x40)
0x15, 0x01, // Logical Minimum (data bytes in the report may have minimum value =
0x00)
0x25, 0x40, // Logical Maximum (data bytes in the report may have maximum value =
0x00FF = unsigned 255)
0x75, 0x08, // Report Size: 8-bit field size
0x95, 0x40, // Report Count: Make sixty-four 8-bit fields (the next time the
parser hits an "Input", "Output", or "Feature" item)
0x81, 0x00, // Input (Data, Array, Abs): Instantiates input packet fields based
on the above report size, count, logical min/max, and usage.
0x19, 0x01, // Usage Minimum
0x29, 0x40, // Usage Maximum //64 output usages total (0x01 to 0x40)
0x91, 0x00, // Output (Data, Array, Abs): Instantiates output packet fields.
Uses same report size and count as "Input" fields, since
nothing // new or different was specified to the
parser since the "Input" item.
0xC0 // End Collection
};
/* HID Function Driver Initialization data structure. This
* contains the size of the report descriptor and a pointer
* to the report descriptor. If there are multiple HID instances
* each with different report descriptors, then multiple such data
* structures may be needed */
USB_DEVICE_HID_INITIALIZATION hidInit =
{
sizeof(hid_rpt01),
(uint8_t *)&hid_rpt01
};
/* The HID function driver instance is now registered with
* device layer through the function driver registration
* table. */
const USB_DEVICE_FUNC_REGISTRATION_TABLE funcRegistrationTable[1] =
{
{
.speed = USB_SPEED_FULL|USB_SPEED_HIGH, // Supported speed
.configurationValue = 1, // To be initialized for Configuration 1
.interfaceNumber = 0, // Starting interface number
.numberOfInterfaces = 1, // Number of Interfaces
.funcDriverIndex = 0, // Function Driver instance index is 0
.funcDriverInit = &hidInit, // Function Driver Initialization
.driver = &hidFuncDriver // Pointer to the function driver - Device
Layer Interface functions
}
};
5.9.6.5.4 Event Handling
Describes HID function driver event handler registration and event handling.
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Description
Registering a HID Function Driver Event Handler:
While creating USB HID Device based application, an event handler must be registered with the Device Layer (the Device Layer
Event Handler) and every HID function driver instance (HID Function Driver Event Handler). The HID function driver event
handler receives HID events. This event handler should be registered before the USB device layer acknowledges the SET
CONFIGURATION request from the USB Host. In order to ensure this, the event handler should be set in the
USB_DEVICE_EVENT_CONFIGURED event that is generated by the device layer. While registering the HID function driver
event handler, the HID function driver allows the application to also pass a data object in the event handler register function. This
data object gets associated with the instance of the HID function driver and is returned by the HID function driver when a HID
function driver event occurs. The code example below shows an example of how this can be done.
/* This a sample Application Device Layer Event Handler
* Note how the HID Function Driver event handler APP_USBDeviceHIDEventHandler()
* is registered in the USB_DEVICE_EVENT_CONFIGURED event. The appData
* object that is passed in the USB_DEVICE_HID_EventHandlerSet()
* function will be returned as the userData parameter in the
* when the APP_USBDeviceHIDEventHandler() function is invoked */
void APP_USBDeviceEventCallBack ( USB_DEVICE_EVENT event,
USB_DEVICE_EVENT_DATA * eventData )
{
switch ( event )
{
case USB_DEVICE_EVENT_RESET:
case USB_DEVICE_EVENT_DECONFIGURED:
// USB device is reset or device is deconfigured.
// This means that USB device layer is about to deininitialize
// all function drivers.
break;
case USB_DEVICE_EVENT_CONFIGURED:
/* check the configuration */
if ( eventData->eventConfigured.configurationValue == 1)
{
/* Register the HID Device application event handler here.
* Note how the appData object pointer is passed as the
* user data */
USB_DEVICE_HID_EventHandlerSet(USB_DEVICE_HID_INDEX_0,
APP_USBDeviceHIDEventHandler, (uintptr_t)&appData);
/* mark that set configuration is complete */
appData.isConfigured = true;
}
break;
case USB_DEVICE_EVENT_SUSPENDED:
break;
case USB_DEVICE_EVENT_RESUMED:
case USB_DEVICE_EVENT_ATTACHED:
case USB_DEVICE_EVENT_DETACHED:
case USB_DEVICE_EVENT_ERROR:
default:
break;
}
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}
HID Function Driver Events:
The HID Function Driver generates events that the application must respond to. Some of these events are control requests
communicated through control transfers. The application must therefore complete the control transfer. Based on the generated
event, the application may be required to:
• Respond with a USB_DEVICE_ControlSend() function which completes the data stage of a Control Read Transfer.
• Respond with a USB_DEVICE_ControlReceive() function which provisions the data stage of a Control Write Transfer.
• Respond with a USB_DEVICE_ControlStatus() function which completes the handshake stage of the Control Transfer. The
application can either STALL or Acknowledge the handshake stage via the USB_DEVICE_ControlStatus() function.
• Analyze the pData member of the event handler and check for event specific data.
The possible HID Function Driver events are described here along with the required application response, event specific data
and likely follow up function driver event:
1. USB_DEVICE_HID_EVENT_CONTROL_GET_REPORT
Application Response: This event is generated when the HID host is requesting for a report over the control interface. The
application must provide the report by calling the USB_DEVICE_ControlSend() function either in the event handler or in the
application (outside of the event handler function). The application must use the controlTransferHandle parameter provided in
the event while calling USB_DEVICE_ControlSend() function. The application can use the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_SENT event to track completion of the command.
Event Specific Data (eventData): The getReport member of the eventData data structure will contain the details about the
requested report.
Likely Follow-up event: This event will likely be followed by the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_SENT event. This indicates that the data was sent to the host
successfully. The application must acknowledge the handshake stage of the control transfer by calling
USB_DEVICE_ControlStatus() function with the USB_DEVICE_CONTROL_STATUS_SEND_ZLP flag.
2. USB_DEVICE_HID_EVENT_CONTROL_SET_REPORT
Application Response: This event is generated when the HID host wants to send a report over the control interface. The
application must provide a buffer to receive the report by calling the USB_DEVICE_ControlReceive() function either in the event
handler or in the application (outside of the event handler function). The application must use the controlTransferHandle
parameter provided in the event while calling USB_DEVICE_ControlReceive() function. The application can use the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_RECEIVED event to track completion of the command.
Event Specific Data (eventData): The setReport member of the eventData data structure will contain the details about the report
that the host intends to send.
Likely Follow-up event: This event will likely be followed by the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_RECEIVED event. This indicates that the data was received
successfully. The application must either acknowledge or stall the handshake stage of the control transfer by calling
USB_DEVICE_ControlStatus() function with USB_DEVICE_CONTROL_STATUS_SEND_ZLP or
USB_DEVICE_CONTROL_STATUS_STALL flag respectively.
3. USB_DEVICE_HID_EVENT_CONTROL_GET_IDLE
Application Response: This event is generated when the HID host wants to read the current idle rate for the specified report. The
application must provide the idle rate through the USB_DEVICE_ControlSend() function either in the event handler or in the
application (outside of the event handler function). The application must use the controlTransferHandle parameter provided in
the event while calling USB_DEVICE_ControlSend() function. The application can use the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_SENT event to track completion of the command.
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Event Specific Data (eventData): The getIdle member of the eventData data structure will contain the details about the report for
which the idle rate is requested.
Likely Follow-up event: This event will likely be followed by the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_SENT event. This indicates that the data was sent to the host
successfully. The application must acknowledge the handshake stage of the control transfer by calling
USB_DEVICE_ControlStatus() function with the USB_DEVICE_CONTROL_STATUS_SEND_ZLP flag.
4. USB_DEVICE_HID_EVENT_CONTROL_SET_IDLE
Application Response: This event is generated when the HID host sends a Set Idle request to the device . The application must
inspect the eventData and determine if the idle rate is to be supported. The application must either acknowledge (if the idle rate
is supported) or stall the handshake stage of the control transfer (if the idle rate is not supported) by calling
USB_DEVICE_ControlStatus() function with USB_DEVICE_CONTROL_STATUS_SEND_ZLP or
USB_DEVICE_CONTROL_STATUS_STALL flag respectively.
Event Specific Data (eventData): The setIdle member of the eventData data structure will contain the details about the report for
which the idle rate should be set and the idle duration.
Likely Follow-up event: None.
5. USB_DEVICE_HID_EVENT_CONTROL_SET_PROTOCOL
Application Response: This event is generated when the HID host sends a Set Protocol request to the device . The application
must inspect the eventData and determine if the protocol is to be supported. The application must either acknowledge (if the
protocol is supported) or stall the handshake stage of the control transfer (if the protocol is not supported) by calling
USB_DEVICE_ControlStatus() function with USB_DEVICE_CONTROL_STATUS_SEND_ZLP or
USB_DEVICE_CONTROL_STATUS_STALL flag respectively.
Event Specific Data (eventData): The setProtocol member of the eventData data structure will contain the details about the
protocol to switch to.
Likely Follow-up event: None.
6. USB_DEVICE_HID_EVENT_CONTROL_GET_PROTOCOL
Application Response: This event is generated when the HID host issues a Get Protocol Request. The application must provide
the current protocol through the USB_DEVICE_ControlSend() function either in the event handler or in the application (outside of
the event handler function). The application must use the controlTransferHandle parameter provided in the event while calling
USB_DEVICE_ControlSend() function. The application can use the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_SENT event to track completion of the command.
Event Specific Data (eventData): None.
Likely Follow-up event: This event will likely be followed by the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_SENT event. This indicates that the data was sent to the host
successfully. The application must acknowledge the handshake stage of the control transfer by calling
USB_DEVICE_ControlStatus() function with the USB_DEVICE_CONTROL_STATUS_SEND_ZLP flag.
7. USB_DEVICE_HID_EVENT_CONTROL_SET_DESCRIPTOR
Application Response: This event is generated when the HID host issues a Set Descriptor request. The application must provide
a buffer to receive the descriptor through the USB_DEVICE_ControlReceive() function either in the event handler or in the
application (outside of the event handler function). The application must use the controlTransferHandle parameter provided in
the event while calling USB_DEVICE_ControlReceive() function. The application can use the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_RECEIVED event to track completion of the command.
Event Specific Data: None
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Likely Follow-up event: This event will likely be followed by the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_RECEIVED event. This indicates that the data was received
successfully. The application must either acknowledge or stall the handshake stage of the control transfer by calling
USB_DEVICE_ControlStatus() function with USB_DEVICE_CONTROL_STATUS_SEND_ZLP or
USB_DEVICE_CONTROL_STATUS_STALL flag respectively.
8. USB_DEVICE_HID_EVENT_REPORT_SENT
Application Response: This event occurs when a report send operation scheduled by calling the
USB_DEVICE_HID_ReportSend() function has completed. This event does not require the application to respond with any
function calls..
Event Specific Data (pData): The reportSent member of the eventData data structure will contains details about the report send
operation.
Likely Follow-up event: None.
9. USB_DEVICE_HID_EVENT_REPORT_RECEIVED
Application Response: This event occurs when a report receive operation scheduled by calling the
USB_DEVICE_HID_ReportReceive() function has completed. This event does not require the application to respond with any
function calls..
Event Specific Data (pData): The reportReceived member of the eventData data structure will contains details about the report
receive operation.
Likely Follow-up event: None
10. USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_SENT
Application Response: This event occurs when the data stage of a control read transfer has completed in response to the
USB_DEVICE_ControlSend() function. The application must acknowledge the handshake stage of the control transfer by calling
USB_DEVICE_ControlStatus() function with USB_DEVICE_CONTROL_STATUS_SEND_ZLP flag.
Event Specific Data (pData): None.
Likely Follow-up event: None.
11. USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_RECEIVED
Application Response: This event occurs when the data stage of a control write transfer has completed in response to the
USB_DEVICE_ControlReceive() function. The application must either acknowledge or stall the handshake stage of the control
transfer by calling USB_DEVICE_ControlStatus() function with USB_DEVICE_CONTROL_STATUS_SEND_ZLP or
USB_DEVICE_CONTROL_STATUS_STALL flag respectively.
Event Specific Data (pData): None
Likely Follow-up event: None.
12. USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_ABORTED
Application Response: This event occurs when the a control transfer request is aborted by the host. The application can use this
event to update its HID class specific control transfer state machine.
Event Specific Data (pData): None
Likely Follow-up event: None.
5.9.6.5.5 Sending a Report
Describes how to send a report.
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Description
The USB HID device sends data to the HID host as reports. The HID device application should use the
USB_DEVICE_HID_ReportSend() function to send the report. This function returns a transfer handler that allows the application
to track the read request. The request is completed when the host as requested for the data. A report send request could fail if
the function driver instance transfer queue is full. The completion of the write transfer is indicated by
USB_DEVICE_HID_EVENT_REPORT_SENT event. The transfer handle and the amount of data sent is returned in the
reportSent member of the eventData data structure along with the event.
The following code snippet shows an example of how USB HID Mouse application sends a report to the host.
/* In this code example, the application uses the
* USB_HID_MOUSE_ReportCreate to create the mouse report
* and then uses the USB_DEVICE_HID_ReportSend() function
* to send the report */
USB_HID_MOUSE_ReportCreate(appData.xCoordinate, appData.yCoordinate,
appData.mouseButton, &appData.mouseReport);
/* Send the mouse report. */
USB_DEVICE_HID_ReportSend(appData.hidInstance,
&appData.reportTransferHandle, (uint8_t*)&appData.mouseReport,
sizeof(USB_HID_MOUSE_REPORT));
5.9.6.5.6 Receiving a Report
Describes how to receive a report
Description
The application can receive a report from the host by using the USB_DEVICE_HID_ReportReceive() function. This function
returns a transfer handler that allows the application to track the read request. The request is completed when the host sends the
report. The application must make sure that it allocates a buffer size that is at least the size of the report. The return value of the
function indicates the success of the request. A read request could fail if the function driver transfer queue is full. The completion
of the read transfer is USB_DEVICE_HID_EVENT_REPORT_RECEIVED event. The reportReceived member of the eventData
data structure contains details about the received report. The following code snippet shows an example of how a USB HID
Keyboard can schedule a receive report operation to get the keyboard LED status.
/* The following code snippet shows how the
* USB HID Keyboard application schedules a
* receive report operation to receive the
* keyboard output report from the host. This
* report contains the keyboard LED status. The
* size of the report is 1 byte */
result = USB_DEVICE_HID_ReportReceive(appData.hidInstance,
&appData.receiveTransferHandle,
(uint8_t *)&appData.keyboardOutputReport,1);
if(USB_DEVICE_HID_RESULT_OK != result)
{
/* Do error handling here */
}
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5.9.6.6 Library Interface
Data Types and Constants
Name Description
USB_DEVICE_HID_CONTROL_STATUS USB Device HID Function Driver Control Transfer
Status
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE USB Device HID Function Driver Control Transfer
Handle
USB_DEVICE_HID_EVENT USB Device HID Function Driver Events
USB_DEVICE_HID_EVENT_DATA_GET_IDLE USB Device HID Get Idle Event Data Type.
USB_DEVICE_HID_EVENT_DATA_GET_PROTOCOL USB Device HID Get Protocol Event Data Type.
USB_DEVICE_HID_EVENT_DATA_GET_REPORT USB Device HID Get Report Event Data Type.
USB_DEVICE_HID_EVENT_DATA_REPORT_RECEIVED USB Device HID Report Received Event Data Type.
USB_DEVICE_HID_EVENT_DATA_REPORT_SENT USB Device HID Report Sent Event Data Type.
USB_DEVICE_HID_EVENT_DATA_SET_DESCRIPTOR USB Device HID Set Descriptor Event Data Type.
USB_DEVICE_HID_EVENT_DATA_SET_IDLE USB Device HID Set Idle Event Data Type.
USB_DEVICE_HID_EVENT_DATA_SET_PROTOCOL USB Device HID Set Protocol Event Data Type.
USB_DEVICE_HID_EVENT_DATA_SET_REPORT USB Device HID Set Report Event Data Type.
USB_DEVICE_HID_EVENT_HANDLER USB Device HID Event Handler Function Pointer Type.
USB_DEVICE_HID_EVENT_RESPONSE USB Device HID Function Driver Event Callback
Response Type
USB_DEVICE_HID_INDEX USB device HID Function Driver Index.
USB_DEVICE_HID_INIT USB Device HID Function Driver Initialization Data
Structure
USB_DEVICE_HID_RESULT USB Device HID Function Driver USB Device HID
Result enumeration.
USB_DEVICE_HID_TRANSFER_HANDLE USB Device HID Function Driver Transfer Handle
Definition.
USB_DEVICE_HID_EVENT_RESPONSE_NONE USB Device HID Function Driver Event Handler
Response Type None.
USB_DEVICE_HID_INSTANCES_NUMBER Specifies the number of HID instances.
USB_DEVICE_HID_QUEUE_DEPTH_COMINED DOM-IGONORE-BEGIN
USB_DEVICE_HID_TRANSFER_HANDLE_INVALID USB Device HID Function Driver Invalid Transfer
Handle Definition.
Functions
Name Description
USB_DEVICE_HID_ControlReceive This function allows the application to respond to the HID function driver
specific control transfer requests. It allows the application to receive data
from the host in the data stage of the control transfer.
USB_DEVICE_HID_ControlSend This function allows the application to respond to the HID function driver
specific control transfer requests. It allows the application to send data to
the host in the data stage of the control transfer.
USB_DEVICE_HID_ControlStatus This function allows the application to complete the status stage of the the
HID Function Driver specific control transfer request.
USB_DEVICE_HID_EventHandlerSet This function registers a event handler for the specified HID function driver
instance.
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USB_DEVICE_HID_ReportReceive This function submits the buffer to HID function driver library to receive a
report from host to device.
USB_DEVICE_HID_ReportSend This function submits the buffer to HID function driver library to send a
report from device to host.
Description
This section describes the Application Programming Interface (API) functions of the USB Device HID library.
Refer to each section for a detailed description.
5.9.6.6.1 Functions
5.9.6.6.1.1 USB_DEVICE_HID_ControlReceive Function
C
USB_DEVICE_HID_RESULT USB_DEVICE_HID_ControlReceive(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * data,
size_t size
);
Description
This function allows the application to respond to the HID function driver specific control transfer requests. It allows the
application to receive data from the host in the data stage of the control transfer. For example, the
USB_DEVICE_HID_EVENT_DATA_SET_REPORT event requires a control transfer response. The function can be called in the
HID Function Driver event handler or can be called outside the event handler. Calling this function outside the event handler
defers the response to the event. This allows the application to prepare the data buffer out of the event handler context,
especially if the data buffer to receive the daya is not readily available. Note however, that there are timing considerations when
responding to the control transfer. Exceeding the response time will cause the host to cancel the control transfer and may cause
USB host to reject the device. The application must use the control transfer handle that was generated along with the event as
the controlTransferHandle.
Preconditions
This function should only be called in response to a HID function driver event that requires a control transfer response.
Parameters
Parameters Description
instance USB Device HID Function Driver instance.
controlTransferHandle Control Transfer handle for the control transfer.
data Data buffer to receive the data stage of the control transfer.
size size (in bytes) of the data to sent.
Returns
USB_DEVICE_HID_RESULT_ERROR_CONTROL_TRANSFER_FAILED - The request was not successful because the USB
host cancelled the control transfer.
USB_DEVICE_HID_RESULT_OK - The request was successful.
Remarks
None.
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Example
// ------------------------------------------------------------------
// In this example, the application responds to the SET REPORT command with
// in the event handler. The application uses the
// USB_DEVICE_HID_ControlReceive() function to do this.
// ------------------------------------------------------------------
USB_DEVICE_HID_EVENT_DATA_SET_REPORT * setReportEventData;
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle;
uint8_t someReport[128];
USB_DEVICE_HID_EVENT_RESPONSE USBDeviceHIDEventHandler
(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_EVENT event,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_HID_EVENT_SET_REPORT:
// In this case, the application should receive the report
// data from the host. The application must use the
// USB_DEVICE_HID_ControlReceive() function to receive the data.
setReportEventData = (USB_DEVICE_HID_EVENT_DATA_SET_REPORT *) pData;
USB_DEVICE_HID_ControlReceive(instanceIndex, controlTransferHandle
someReport, setReportEventData->reportSize);
break;
}
}
// --------------------------------------------------------------------
// In this example, the application defers the response to the
// event. This is done by calling the USB_DEVICE_HID_ControlReceive()
// function out side the event handler.
// --------------------------------------------------------------------
USB_DEVICE_HID_EVENT_DATA_SET_REPORT setReportEventData;
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE thisControlTransferHandle;
bool receiveReportFromHost;
uint8_t * someReport;
USB_DEVICE_HID_EVENT_RESPONSE USBDeviceHIDEventHandler
(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_EVENT event,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_HID_EVENT_SET_LINE_CODING:
// In this case, the application should send the line coding
// data to the host. The application must responds to the
// event outside the event handler because the data buffer is
// not available.
setReportEventData = (USB_DEVICE_HID_EVENT_DATA_GET_REPORT *)pData;
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thisControlTransferHandle = controlTransferHandle;
receiveReportFromHost = true;
break;
}
}
// This is outside the event handler.
if(receiveReportFromHost)
{
// The application allocates a buffer using an arbitrary function
setReport = AllocateMemoryBuffer();
USB_DEVICE_HID_ControlReceive(instanceIndex, thisControlTransferHandle
setReport, setReportEventData->reportSize);
}
5.9.6.6.1.2 USB_DEVICE_HID_ControlSend Function
C
USB_DEVICE_HID_RESULT USB_DEVICE_HID_ControlSend(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * data,
size_t size
);
Description
This function allows the application to respond to the HID function driver specific control transfer requests. It allows the
application to send data to the host in the data stage of the control transfer. For example, the
USB_DEVICE_HID_EVENT_DATA_REPORT_SENT event requires a control transfer response. The function can be called in
the HID Function Driver event handler or can be called outside the event handler. Calling this function outside the event handler
defers the response to the event. This allows the application to prepare the response data out of the event handler context,
especially if the data is not readily available. Note however, that there are timing considerations when responding to the control
transfer. Exceeding the response time will cause the host to cancel the control transfer and may cause USB host to reject the
device. The application must use the control transfer handle that was generated along with the event as the
controlTransferHandle.
Preconditions
This function should only be called in response to a HID function driver event that requires a control transfer response.
Parameters
Parameters Description
instance USB Device HID Function Driver instance.
controlTransferHandle Control Transfer handle for the control transfer.
data Data that represents the data stage of the control transfer.
size size (in bytes) of the data to sent.
Returns
USB_DEVICE_HID_RESULT_ERROR_CONTROL_TRANSFER_FAILED - The request was not successful because the USB
host cancelled the control transfer.
USB_DEVICE_HID_RESULT_OK - The request was successful.
Remarks
None.
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Example
// ------------------------------------------------------------------
// In this example, the application responds to the GET REPORT
// with in the event handler. The application uses the
// USB_DEVICE_HID_ControlSend() function to do this.
// ------------------------------------------------------------------
USB_DEVICE_HID_EVENT_DATA_GET_REPORT * getReportEventData;
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle;
uint8_t someReport[128];
USB_DEVICE_HID_EVENT_RESPONSE USBDeviceHIDEventHandler
(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_EVENT event,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_HID_EVENT_GET_REPORT:
// In this case, the application should send the report
// to the host. The application must use the
// USB_DEVICE_HID_ControlSend() function to send the data.
getReportEventData = (USB_DEVICE_HID_EVENT_DATA_GET_REPORT *)pData;
USB_DEVICE_HID_ControlSend(instanceIndex, controlTransferHandle
someReport,
getReportEventData->reportSize);
break;
}
}
// --------------------------------------------------------------------
// In this example, the application defers the response to the
// event. This is done by calling the USB_DEVICE_HID_ControlSend()
// function out side the event handler.
// --------------------------------------------------------------------
USB_DEVICE_HID_EVENT_DATA_GET_REPORT * getReportEventData;
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle;
uint8_t someReport[128];
bool sendReportToHost;
USB_DEVICE_HID_EVENT_RESPONSE USBDeviceHIDEventHandler
(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_EVENT event,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_HID_EVENT_GET_REPORT:
// In this case, the application should send the report
// data to the host. The application does not call this function
// in the event handler, because it does not have the report
// data ready.
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getReportEventData = (USB_DEVICE_HID_EVENT_DATA_GET_REPORT *)pData;
thisControlTransferHandle = controlTransferHandle;
sendReportToHost = true;
break;
}
}
// This is outside the event handler.
if(sendReportToHost)
{
// The application fetches the report coding from the
// an EEPROM.
GetReportFromEEPROM(someReport);
USB_DEVICE_HID_ControlSend(instanceIndex, controlTransferHandle
someReport,
getReportEventData->reportSize);
}
5.9.6.6.1.3 USB_DEVICE_HID_ControlStatus Function
C
USB_DEVICE_HID_RESULT USB_DEVICE_HID_ControlStatus(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
USB_DEVICE_HID_CONTROL_STATUS status
);
Description
This function allows the application to complete the status stage of the the HID Function Driver specific control transfer request.
The application can either accept the data stage or stall it. Calling this function with status set to
USB_DEVICE_HID_CONTROL_STATUS_OK will acknowledge the status stage of the control transfer. The control transfer can
be stalled by setting the status parameter to USB_DEVICE_HID_CONTROL_STATUS_ERROR. The function can be called in
the HID Function Driver event handler or can be called outside the event handler. Calling this function outside the event handler
defers the response to the event. This allows the application to analyze the event response outside the event handler. Note
however, that there are timing considerations when responding to the control transfer. Exceeding the response time will cause
the host to cancel the control transfer and may cause USB host to reject the device. The application must use the control transfer
handle that was generated along with the event as the controlTransferHandle. The application must be aware of events and
associated control transfers that do or do not require data stages. Incorrect usage of the USB_DEVICE_HID_ControlStatus()
function could cause the device function to be non-compliant.
Preconditions
This function should only be called in response to a HID function driver event that requires a control transfer response.
Parameters
Parameters Description
instance USB Device HID Function Driver instance.
controlTransferHandle Control Transfer handle for the control transfer.
status Set to USB_DEVICE_HID_CONTROL_STATUS_OK to acknowledge the control
transfer. Set to USB_DEVICE_HID_CONTROL_STATUS_ERROR to stall the
transfer.
Returns
USB_DEVICE_HID_RESULT_ERROR_CONTROL_TRANSFER_FAILED - The request was not successful because the USB
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host cancelled the control transfer.
USB_DEVICE_HID_RESULT_OK - The request was successful.
Remarks
None.
Example
// ------------------------------------------------------------------
// In this code example, the application responds to the the
// SET IDLE event in the event handler.
// ------------------------------------------------------------------
USB_DEVICE_HID_EVENT_DATA_SET_IDLE * setIdleEventData;
USB_DEVICE_HID_EVENT_RESPONSE USBDeviceHIDEventHandler
(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_EVENT event,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_HID_EVENT_SET_IDLE:
// The application can check if the break duration is supported.
setIdleEventData = (USB_DEVICE_HID_EVENT_DATA_SET_IDLE *)pData;
if(IsDurationSupported(setIdleEventData->duration))
{
USB_DEVICE_HID_ControlStatus(instanceIndex,
controlTransferHandle, USB_DEVICE_HID_CONTROL_STATUS_OK);
}
else
{
// If the duration is not supported the application
// can stall it.
USB_DEVICE_HID_ControlStatus(instanceIndex,
controlTransferHandle, USB_DEVICE_HID_CONTROL_STATUS_ERROR);
}
break;
...
}
return(USB_DEVICE_HID_EVENT_RESPONSE_NONE);
}
// --------------------------------------------------------------------
// In this example, the application defers the response to the
// SET IDLE event. The application responds to the event in
// outside the event handler.
// --------------------------------------------------------------------
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE thisControlTransferHandle;
USB_DEVICE_HID_EVENT_DATA_SET_IDLE * setIdleEventData;
uint8_t duration;
bool setIdleEvent;
USB_DEVICE_HID_EVENT_RESPONSE USBDeviceHIDEventHandler
(
USB_DEVICE_HID_INDEX instanceIndex,
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USB_DEVICE_HID_EVENT event,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
switch(event)
{
case USB_DEVICE_HID_EVENT_SEND_BREAK:
// Get the idle duration.
setIdleEventData = (USB_DEVICE_HID_EVENT_DATA_SET_IDLE *)pData;
duration = setIdleEventData->duration;
setIdleEvent = true;
break;
...
}
return(USB_DEVICE_HID_EVENT_RESPONSE_NONE);
}
// This is outside the event handler.
if(setIdleEvent)
{
// The application checks if the duration is supported
if(IsDurationSupported(setIdleEventData->duration))
{
USB_DEVICE_HID_ControlStatus(instanceIndex,
controlTransferHandle, USB_DEVICE_HID_CONTROL_STATUS_OK);
}
else
{
// If the duration is not supported the application
// can stall it.
USB_DEVICE_HID_ControlStatus(instanceIndex,
controlTransferHandle, USB_DEVICE_HID_CONTROL_STATUS_ERROR);
}
}
5.9.6.6.1.4 USB_DEVICE_HID_EventHandlerSet Function
C
USB_DEVICE_HID_RESULT USB_DEVICE_HID_EventHandlerSet(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_EVENT_HANDLER eventHandler,
uintptr_t context
);
Description
This function registers a event handler for the specified HID function driver instance. This function should be called by the client
when it receives a SET CONFIGURATION event from the device layer. A event handler must be registered for function driver to
respond to function driver specific commands. If the event handler is not registered, the device layer will stall function driver
specific commands and the USB device may not function.
Preconditions
This function should be called when the function driver has been initialized as a result of a set configuration.
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Parameters
Parameters Description
instance Instance of the HID Function Driver.
eventHandler A pointer to event handler function.
context Application specific context that is returned in the event handler.
Returns
USB_DEVICE_HID_RESULT_OK - The operation was successful USB_DEVICE_HID_RESULT_ERROR_INSTANCE_INVALID
- The specified instance does not exist. USB_DEVICE_HID_RESULT_ERROR_PARAMETER_INVALID - The eventHandler
parameter is NULL
Remarks
None.
Example
// This code snippet shows an example registering an event handler. Here
// the application specifies the context parameter as a pointer to an
// application object (appObject) that should be associated with this
// instance of the HID function driver.
USB_DEVICE_HID_RESULT result;
USB_DEVICE_HID_EVENT_RESPONSE APP_USBDeviceHIDEventHandler
(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_EVENT event,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t context
)
{
// Event Handling comes here
switch(event)
{
...
}
return(USB_DEVICE_HID_EVENT_RESPONSE_NONE);
}
result = USB_DEVICE_HID_EventHandlerSet ( 0 ,&APP_EventHandler, (uintptr_t) &appObject);
if(USB_DEVICE_HID_RESULT_OK != result)
{
SYS_ASSERT ( false , "Error while registering event handler" );
}
5.9.6.6.1.5 USB_DEVICE_HID_ReportReceive Function
C
USB_DEVICE_HID_RESULT USB_DEVICE_HID_ReportReceive(
USB_DEVICE_HID_INDEX iHID,
USB_DEVICE_HID_TRANSFER_HANDLE * handle,
void * buffer,
size_t size
);
Description
This function submits the buffer to HID function driver library to receive a report from host to device. On completion of the
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transfer the library generates USB_DEVICE_HID_EVENT_REPORT_RECEIVED event to the application. A handle to the
request is passed in the transferHandle parameter. The transfer handle expires when event handler for the
USB_DEVICE_HID_EVENT_REPORT_RECEIVED exits. If the receive request could not be accepted, the function returns an
error code and transferHandle will contain the value USB_DEVICE_HID_TRANSFER_HANDLE_INVALID.
Preconditions
USB device layer must be initialized.
Parameters
Parameters Description
iHID HID instance index.
transferHandle HID transfer handle.
buffer Pointer to buffer where the received report has to be received stored.
size Buffer size.
Returns
USB_DEVICE_HID_RESULT_OK - The receive request was successful. transferHandle contains a valid transfer handle.
USB_DEVICE_HID_RESULT_ERROR_TRANSFER_QUEUE_FULL - internal request queue is full. The receive request could
not be added.
USB_DEVICE_HID_RESULT_ERROR_INSTANCE_NOT_CONFIGURED - The specified instance is not configured yet.
USB_DEVICE_HID_RESULT_ERROR_INSTANCE_INVALID - The specified instance was not provisioned in the application
and is invalid.
Remarks
None.
Example
USB_DEVICE_HID_TRANSFER_HANDLE hidTransferHandle;
USB_DEVICE_HID_RESULT result;
// Register APP_HIDEventHandler function
USB_DEVICE_HID_EventHandlerSet( USB_DEVICE_HID_INDEX_0 ,
APP_HIDEventHandler );
// Prepare report and request HID to send the report.
result = USB_DEVICE_HID_ReportReceive( USB_DEVICE_HID_INDEX_0,
&hidTransferHandle ,
&appReport[0], sizeof(appReport));
if( result != USB_DEVICE_HID_RESULT_OK)
{
//Handle error.
}
//Implementation of APP_HIDEventHandler
USB_DEVICE_HIDE_EVENT_RESPONSE APP_HIDEventHandler
{
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_EVENT event,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t context
}
{
USB_DEVICE_HID_EVENT_DATA_REPORT_RECEIVED reportReceivedEventData;
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// Handle HID events here.
switch (event)
{
case USB_DEVICE_HID_EVENT_REPORT_RECEIVED:
if( (reportReceivedEventData->reportSize == sizeof(appReport)
&& reportReceivedEventData->report == &appReport[0])
{
// Previous transfer was complete.
}
break;
....
}
}
5.9.6.6.1.6 USB_DEVICE_HID_ReportSend Function
C
USB_DEVICE_HID_RESULT USB_DEVICE_HID_ReportSend(
USB_DEVICE_HID_INDEX iHID,
USB_DEVICE_HID_TRANSFER_HANDLE * handle,
void * buffer,
size_t size
);
Description
This function places a request to send a HID report with the USB Device HID Function Driver Layer. The function places a
requests with driver, the request will get serviced when report is requested by the USB Host. A handle to the request is returned
in the transferHandle parameter. The termination of the request is indicated by the
USB_DEVICE_HID_EVENT_REPORT_SENT event. The amount of data sent, a pointer to the report and the transfer handle
associated with the request is returned along with the event in the pData parameter of the event handler. The transfer handle
expires when event handler for the USB_DEVICE_HID_EVENT_REPORT_SENT exits. If the send request could not be
accepted, the function returns an error code and transferHandle will contain the value
USB_DEVICE_HID_TRANSFER_HANDLE_INVALID.
Preconditions
USB device layer must be initialized.
Parameters
Parameters Description
instance USB Device HID Function Driver instance.
transferHandle Pointer to a USB_DEVICE_HID_TRANSFER_HANDLE type of variable. This
variable will contain the transfer handle in case the send request was successful.
data pointer to the data buffer containing the report to be sent.
size Size (in bytes) of the report to be sent.
Returns
USB_DEVICE_HID_RESULT_OK - The send request was successful. transferHandle contains a valid transfer handle.
USB_DEVICE_HID_RESULT_ERROR_TRANSFER_QUEUE_FULL - Internal request queue is full. The send request could not
be added.
USB_DEVICE_HID_RESULT_ERROR_INSTANCE_NOT_CONFIGURED - The specified instance is not configured yet.
USB_DEVICE_HID_RESULT_ERROR_INSTANCE_INVALID - The specified instance was not provisioned in the application
and is invalid.
Remarks
None.
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Example
USB_DEVICE_HID_TRANSFER_HANDLE hidTransferHandle;
USB_DEVICE_HID_RESULT result;
// Register APP_HIDEventHandler function
USB_DEVICE_HID_EventHandlerSet( USB_DEVICE_HID_INDEX_0 ,
APP_HIDEventHandler );
// Prepare report and request HID to send the report.
result = USB_DEVICE_HID_ReportSend( USB_DEVICE_HID_INDEX_0,
&hidTransferHandle ,
&appReport[0], sizeof(appReport));
if( result != USB_DEVICE_HID_RESULT_OK)
{
//Handle error.
}
//Implementation of APP_HIDEventHandler
USB_DEVICE_HIDE_EVENT_RESPONSE APP_HIDEventHandler
{
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_EVENT event,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t context
}
{
USB_DEVICE_HID_EVENT_DATA_REPORT_SENT * reportSentEventData;
// Handle HID events here.
switch (event)
{
case USB_DEVICE_HID_EVENT_REPORT_SENT:
reportSentEventData = (USB_DEVICE_HID_EVENT_REPORT_SENT *)pData;
if(reportSentEventData->reportSize == sizeof(appReport))
{
// The report was sent completely.
}
break;
....
}
return(USB_DEVICE_HID_EVENT_RESPONSE_NONE);
}
5.9.6.6.2 Data Types and Constants
5.9.6.6.2.1 USB_DEVICE_HID_CONTROL_STATUS Enumeration
C
typedef enum {
USB_DEVICE_HID_CONTROL_STATUS_OK,
USB_DEVICE_HID_CONTROL_STATUS_ERROR
} USB_DEVICE_HID_CONTROL_STATUS;
Description
USB Device HID Function Driver Control Transfer Status
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This flag is used along with the USB_DEVICE_HID_ControlStatus() function to indicate success or failure of a HID class specific
control transfer request.
Members
Members Description
USB_DEVICE_HID_CONTROL_STATUS_OK The application must use this flag when the data received through the
USB_DEVICE_HID_ControlReceive() function was accepted. Using this
flag causes the status stage of the associated control transfer to be
completed.
USB_DEVICE_HID_CONTROL_STATUS_ERROR The application must use this flag when the control request was not
supported or the data received using the
USB_DEVICE_HID_ControlReceive() function was not accepted. Using
this flag causes the status stage of the associated control transfer to be
stalled.
Remarks
None.
5.9.6.6.2.2 USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE Type
C
typedef USB_DEVICE_CONTROL_TRANSFER_HANDLE USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE;
Description
USB Device HID Function Driver Control Transfer Handle
This is returned by the HID function driver event handler and should be used by the application while responding to HID function
driver control transfer requests.
Remarks
None.
5.9.6.6.2.3 USB_DEVICE_HID_EVENT Enumeration
C
typedef enum {
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_RECEIVED,
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_SENT,
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_ABORTED,
USB_DEVICE_HID_EVENT_GET_REPORT,
USB_DEVICE_HID_EVENT_GET_IDLE,
USB_DEVICE_HID_EVENT_GET_PROTOCOL,
USB_DEVICE_HID_EVENT_SET_REPORT,
USB_DEVICE_HID_EVENT_SET_IDLE,
USB_DEVICE_HID_EVENT_SET_PROTOCOL,
USB_DEVICE_HID_EVENT_SET_DESCRIPTOR,
USB_DEVICE_HID_EVENT_REPORT_SENT,
USB_DEVICE_HID_EVENT_REPORT_RECEIVED
} USB_DEVICE_HID_EVENT;
Description
USB Device HID Function Driver Events
These events are specific to the USB Device HID Function Driver instance. Each event description contains details about the
parameters passed with event. The contents of pData depends on the generated event.
Events that are associated with the HID Function Driver Specific Control Transfers require application response and will be
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generated along with a HID Control Transfer Handle. This allows the application to respond to the HID function driver control
transfer requests. The application should respond to these events by using the USB_DEVICE_HID_ControlReceive(),
USB_DEVICE_HID_ControlSend() and USB_DEVICE_HID_ControlStatus() functions.
Calling the USB_DEVICE_HID_ControlStatus() function with a USB_DEVICE_HID_CONTROL_STATUS_ERROR will stall the
control transfer request. The application would do this if the control transfer request is not supported. Calling the
USB_DEVICE_HID_ControlStatus() function with a USB_DEVICE_HID_CONTROL_STATUS_OK will complete the status stage
of the control transfer request. The application would do this if the control transfer request is supported
The following code snippet shows an example of a possible event handling scheme.
// This code example shows all HID Function Driver events and a possible
// scheme for handling these events. In this example event responses are not
// deferred.
USB_DEVICE_HID_EVENT_RESPONSE USB_AppHIDEventHandler
(
USB_DEVICE_HID_INDEX instanceIndex,
USB_DEVICE_HID_EVENT event,
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE controlTransferHandle,
void * pData,
uintptr_t userData
)
{
USB_DEVICE_HID_EVENT_DATA_GET_REPORT * getReportEventData;
USB_DEVICE_HID_EVENT_DATA_GET_PROTOCOL currentProtocol;
USB_DEVICE_HID_EVENT_DATA_SET_PROTOCOL * setProtocolEventData;
USB_DEVICE_HID_EVENT_DATA_SET_IDLE * setIdleEventData;
USB_DEVICE_HID_EVENT_DATA_GET_IDLE * getIdleEventData;
USB_DEVICE_HID_EVENT_DATA_SET_DESCRIPTOR * setDescriptorEventData;
USB_DEVICE_HID_EVENT_DATA
USB_DEVICE_HID_EVENT_DATA_SET_REPORT * setReportEventData;
uint8_t idleRate;
uint8_t someHIDReport[128];
uint8_t someHIDDescriptor[128];
switch(event)
{
case USB_DEVICE_HID_EVENT_GET_REPORT:
// In this case, pData should be interpreted as a
// USB_DEVICE_HID_EVENT_DATA_GET_REPORT pointer. The application
// must send the requested report by using the
// USB_DEVICE_HID_ControlSend() function.
getReportEventData = (USB_DEVICE_HID_EVENT_DATA_GET_REPORT *)pData;
USB_DEVICE_HID_ControlSend(instanceIndex, controlTransferHandle,
someHIDReport, getReportEventData->reportLength);
break;
case USB_DEVICE_HID_EVENT_GET_PROTOCOL:
// In this case, pData will be NULL. The application
// must send the current protocol to the host by using
// the USB_DEVICE_HID_ControlSend() function.
USB_DEVICE_HID_ControlSend(instanceIndex, controlTransferHandle,
¤tProtocol,
sizeof(USB_DEVICE_HID_EVENT_DATA_GET_PROTOCOL));
break;
case USB_DEVICE_HID_EVENT_GET_IDLE:
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// In this case, pData will be a
// USB_DEVICE_HID_EVENT_DATA_GET_IDLE pointer type. The application
// must send the current idle rate to the host by using
// the USB_DEVICE_HID_ControlSend() function.
getLineCodingData = (USB_DEVICE_HID_EVENT_DATA_GET_IDLE *) pData;
USB_DEVICE_HID_ControlSend(instanceIndex, controlTransferHandle,
¤tIdleRate, 1);
break;
case USB_DEVICE_HID_EVENT_SET_REPORT:
// In this case, pData should be interpreted as a
// USB_DEVICE_HID_EVENT_DATA_SET_REPORT type pointer. The
// application can analyze the request and then obtain the
// report by using the USB_DEVICE_HID_ControlReceive() function.
setReportEventData = (USB_DEVICE_HID_EVENT_DATA_SET_REPORT *)pData;
USB_DEVICE_HID_ControlReceive(instanceIndex, controlTransferHandle
someHIDReport, setReportEventData->reportLength);
break;
case USB_DEVICE_HID_EVENT_SET_PROTOCOL:
// In this case, pData should be interpreted as a
// USB_DEVICE_HID_EVENT_DATA_SET_PROTOCOL type pointer. The
// application can analyze the data and decide to stall
// or accept the setting. This shows an example of accepting
// the protocol setting.
setProtocolEventData = (USB_DEVICE_HID_EVENT_DATA_SET_PROTOCOL *)pData;
USB_DEVICE_HID_ControlStatus(instanceIndex, controlTransferHandle,
USB_DEVICE_HID_CONTROL_STATUS_OK);
break;
case USB_DEVICE_HID_EVENT_SET_IDLE:
// In this case, pData should be interpreted as a
// USB_DEVICE_HID_EVENT_DATA_SET_IDLE type pointer. The
// application can analyze the data and decide to stall
// or accept the setting. This shows an example of accepting
// the protocol setting.
setIdleEventData = (USB_DEVICE_HID_EVENT_DATA_SET_IDLE *)pData;
USB_DEVICE_HID_ControlStatus(instanceIndex, controlTransferHandle,
USB_DEVICE_HID_CONTROL_STATUS_OK);
break;
case USB_DEVICE_HID_EVENT_SET_DESCRIPTOR:
// In this case, the pData should be interpreted as a
// USB_DEVICE_HID_EVENT_DATA_SET_DESCRIPTOR type pointer. The
// application can analyze the request and then obtain the
// descriptor by using the USB_DEVICE_HID_ControlReceive() function.
setDescriptorEventData = (USB_DEVICE_HID_EVENT_DATA_SET_REPORT *)pData;
USB_DEVICE_HID_ControlReceive(instanceIndex, controlTransferHandle
someHIDReport, setReportEventData->reportLength);
break;
case USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_RECEIVED:
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// In this case, control transfer data was received. The
// application can inspect that data and then stall the
// handshake stage of the control transfer or accept it
// (as shown here).
USB_DEVICE_HID_ControlStatus(instanceIndex, controlTransferHandle
USB_DEVICE_HID_CONTROL_STATUS_OK);
break;
case USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_SENT:
// This means that control transfer data was sent. The
// application would typically acknowledge the handshake
// stage of the control transfer.
USB_DEVICE_HID_ControlStatus(instanceIndex, controlTransferHandle,
USB_DEVICE_HID_CONTROL_STATUS_OK);
break;
case USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_ABORTED:
// This is an indication only event. The application must
// reset any HID control transfer related tasks when it receives
// this event.
break;
case USB_DEVICE_HID_EVENT_REPORT_RECEIVED:
// This means a HID report receive request has completed.
// The pData member should be interpreted as a
// USB_DEVICE_HID_EVENT_DATA_REPORT_RECEIVED pointer type.
break;
case USB_DEVICE_HID_EVENT_REPORT_SENT:
// This means a HID report send request has completed.
// The pData member should be interpreted as a
// USB_DEVICE_HID_EVENT_DATA_REPORT_SENT pointer type.
break;
}
return(USB_DEVICE_HID_EVENT_RESPONSE_NONE);
}
Members
Members Description
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_RECEIVED This event occurs when the data stage of a control
write transfer has completed. This event would occur
after the application uses the
USB_DEVICE_HID_ControlReceive() function to
respond to a HID Function Driver Control Transfer
Event that requires data to be received from the
host. The pData parameter will be NULL.
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USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_DATA_SENT This event occurs when the data stage of a control
read transfer has completed. This event would occur
after the application uses the
USB_DEVICE_HID_ControlSend() function to
respond to a HID Function Driver Control Transfer
Event that requires data to be sent to the host. The
pData parameter will be NULL
USB_DEVICE_HID_EVENT_CONTROL_TRANSFER_ABORTED This event occurs when an ongoing control transfer
was aborted. The application must stop any remaing
activities on control transfers
USB_DEVICE_HID_EVENT_GET_REPORT This event occurs when the host issues a GET
REPORT command. The application must interpret
the pData parameter as
USB_DEVICE_HID_EVENT_DATA_GET_REPORT
pointer type. If the report request is supported, the
application must send the report to the host by using
the USB_DEVICE_HID_ControlSend() function
either in the event handler or after the event handler
routine has returned. The application can track the
completion of the request by using the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFE
R_DATA_SENT
event. If the report request is not supported, the
application must stall the request by calling the
USB_DEVICE_HID_ControlStatus() function with a
USB_DEVICE_HID_CONTROL_STATUS_ERROR
flag.
USB_DEVICE_HID_EVENT_GET_IDLE This event occurs when the host issues a GET IDLE
command. The pData parameter will be a
USB_DEVICE_HID_EVENT_DATA_GET_IDLE
pointer type. If the request is supported, the
application must send the idle rate to the host by
calling the USB_DEVICE_HID_ControlSend()
function. This function can be called either in the
event handler or after the event handler routine has
returned. The application can track the completion of
the request by using the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFE
R_DATA_SENT
event. If the request is not supported, the application
must stall the request by calling the
USB_DEVICE_HID_ControlStatus() function with a
USB_DEVICE_HID_CONTROL_STATUS_ERROR
flag.
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USB_DEVICE_HID_EVENT_GET_PROTOCOL This event occurs when the host issues a GET
PROTOCOL command. The pData parameter will be
NULL. If the request is supported, the application
must send a
USB_DEVICE_HID_EVENT_DATA_GET_PROTOC
OL
data type object, containing the current protocol, to
the host by calling the
USB_DEVICE_HID_ControlSend() function. This
function can be called either in the event handler or
after the event handler routine has returned. The
application can track the completion of the request
by using the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFE
R_DATA_SENT
event. If the request is not supported, the application
must stall the request by calling the
USB_DEVICE_HID_ControlStatus() function with a
USB_DEVICE_HID_CONTROL_STATUS_ERROR
flag.
USB_DEVICE_HID_EVENT_SET_REPORT This event occurs when the host issues a SET
REPORT command. The application must interpret
the pData parameter as a
USB_DEVICE_HID_EVENT_DATA_SET_REPORT
pointer type. If the report request is supported, the
application must provide a buffer, to recevie the
report, to the host by calling the
USB_DEVICE_HID_ControlReceive() function either
in the event handler or after the event handler
routine has returned. The application can track the
completion of the request by using the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFE
R_DATA_RECEIVED
event. If the report request is not supported, the
application must stall the request by calling the
USB_DEVICE_HID_ControlStatus() function with a
USB_DEVICE_HID_CONTROL_STATUS_ERROR
flag.
USB_DEVICE_HID_EVENT_SET_IDLE This event occurs when the host issues a SET IDLE
command. The pData parameter will be
USB_DEVICE_HID_EVENT_DATA_SET_IDLE
pointer type. The application can analyze the idle
duration and acknowledge or reject the setting by
calling the USB_DEVICE_HID_ControlStatus()
function. This function can be called in the event
handler or after the event handler exits. If application
can reject the request by calling the
USB_DEVICE_HID_ControlStatus() function with a
USB_DEVICE_HID_CONTROL_STATUS_ERROR
flag. It can accept the request by calling this function
with USB_DEVICE_HID_CONTROL_STATUS_OK
flag.
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USB_DEVICE_HID_EVENT_SET_PROTOCOL This event occurs when the host issues a SET
PROTOCOL command. The pData parameter will be
NULL. If the request is supported, the application
must provide a
USB_DEVICE_HID_EVENT_DATA_SET_PROTOC
OL
data type object to receive the current protocol from
the host by calling the
USB_DEVICE_HID_ControlReceive() function. This
function can be called either in the event handler or
after the event handler routine has returned. The
application can track the completion of the request
by using the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFE
R_DATA_RECEIVED
event. If the request is not supported, the application
must stall the request by calling the
USB_DEVICE_HID_ControlStatus() function with a
USB_DEVICE_HID_CONTROL_STATUS_ERROR
flag.
USB_DEVICE_HID_EVENT_SET_DESCRIPTOR This event occurs when the host issues a SET
DESCRIPTOR command. The pData parameter will
be a
USB_DEVICE_HID_EVENT_DATA_SET_DESCRIP
TOR
type pointer. If the request is supported, the
application must provide a buffer to receive the
descriptor from the host by calling the
USB_DEVICE_HID_ControlReceive() function. This
function can be called either in the event handler or
after the event handler routine has returned. The
application can track the completion of the request
by using the
USB_DEVICE_HID_EVENT_CONTROL_TRANSFE
R_DATA_RECEIVED
event. If the request is not supported, the application
must stall the request by calling the
USB_DEVICE_HID_ControlStatus() function with a
USB_DEVICE_HID_CONTROL_STATUS_ERROR
flag.
USB_DEVICE_HID_EVENT_REPORT_SENT This event indicates that
USB_DEVICE_HID_ReportSend() function
completed a report transfer on interrupt endpoint
from host to device. The pData parameter will be a
USB_DEVICE_HID_EVENT_DATA_REPORT_SENT
type.
USB_DEVICE_HID_EVENT_REPORT_RECEIVED This event indicates that
USB_DEVICE_HID_ReportReceive() function
completed a report transfer on interrupt endpoint
from device to host. The pData parameter will be a
USB_DEVICE_HID_EVENT_DATA_REPORT_REC
EIVED
type
Remarks
Some of the events allow the application to defer responses. This allows the application some time to obtain the response data
rather than having to respond to the event immediately. Note that a USB host will typically wait for event response for a finite
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time duration before timing out and cancelling the event and associated transactions. Even when deferring response, the
application must respond promptly if such timeouts have to be avoided.
5.9.6.6.2.4 USB_DEVICE_HID_EVENT_DATA_GET_IDLE Structure
C
typedef struct {
uint8_t reportID;
} USB_DEVICE_HID_EVENT_DATA_GET_IDLE;
Description
USB Device HID Get Idle Event Data Type.
This defines the data type of the data generated to the HID event handler on a USB_DEVICE_HID_EVENT_SET_REPORT
event.
Members
Members Description
uint8_t reportID; Report ID of the report of which idle rate is requested.
Remarks
None.
5.9.6.6.2.5 USB_DEVICE_HID_EVENT_DATA_GET_PROTOCOL Structure
C
typedef struct {
USB_HID_PROTOCOL_CODE protocol;
} USB_DEVICE_HID_EVENT_DATA_GET_PROTOCOL;
Description
USB Device HID Get Protocol Event Data Type.
This defines the data type of the data to be sent to the host in response to USB_DEVICE_HID_EVENT_GET_PROTOCOL
event. The data should be sent to the host by calling the USB_DEVICE_HID_ControlSend() function.
Remarks
None.
5.9.6.6.2.6 USB_DEVICE_HID_EVENT_DATA_GET_REPORT Structure
C
typedef struct {
uint8_t reportType;
uint8_t reportID;
uint16_t reportLength;
} USB_DEVICE_HID_EVENT_DATA_GET_REPORT;
Description
USB Device HID Get Report Event Data Type.
This defines the data type of the data generated to the HID event handler on a USB_DEVICE_HID_EVENT_GET_REPORT
event.
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Members
Members Description
uint8_t reportType; Report type
uint8_t reportID; Report ID
uint16_t reportLength; Report Length
Remarks
None.
5.9.6.6.2.7 USB_DEVICE_HID_EVENT_DATA_REPORT_RECEIVED Structure
C
typedef struct {
USB_DEVICE_HID_TRANSFER_HANDLE handle;
size_t length;
} USB_DEVICE_HID_EVENT_DATA_REPORT_RECEIVED;
Description
USB Device HID Report Received Event Data Type.
This defines the data type of the data generated to the HID event handler on a
USB_DEVICE_HID_EVENT_REPORT_RECEIVED event.
Members
Members Description
USB_DEVICE_HID_TRANSFER_HANDLE
handle;
Transfer handle
size_t length; Report size received
Remarks
None.
5.9.6.6.2.8 USB_DEVICE_HID_EVENT_DATA_REPORT_SENT Structure
C
typedef struct {
USB_DEVICE_HID_TRANSFER_HANDLE handle;
size_t length;
} USB_DEVICE_HID_EVENT_DATA_REPORT_SENT;
Description
USB Device HID Report Sent Event Data Type.
This defines the data type of the data generated to the HID event handler on a USB_DEVICE_HID_EVENT_REPORT_SENT
event.
Members
Members Description
USB_DEVICE_HID_TRANSFER_HANDLE
handle;
Transfer handle
size_t length; Report size transmitted
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Remarks
None.
5.9.6.6.2.9 USB_DEVICE_HID_EVENT_DATA_SET_DESCRIPTOR Structure
C
typedef struct {
uint8_t descriptorType;
uint8_t descriptorIndex;
uint16_t descriptorLength;
} USB_DEVICE_HID_EVENT_DATA_SET_DESCRIPTOR;
Description
USB Device HID Set Descriptor Event Data Type.
This defines the data type of the data generated to the HID event handler on a USB_DEVICE_HID_EVENT_SET_DESCRIPTOR
event.
Members
Members Description
uint8_t descriptorType; Descriptor Type
uint8_t descriptorIndex; Descriptor Index
uint16_t descriptorLength; Descriptor Length
Remarks
None.
5.9.6.6.2.10 USB_DEVICE_HID_EVENT_DATA_SET_IDLE Structure
C
typedef struct {
uint8_t duration;
uint8_t reportID;
} USB_DEVICE_HID_EVENT_DATA_SET_IDLE;
Description
USB Device HID Set Idle Event Data Type.
This defines the data type of the data generated to the HID event handler on a USB_DEVICE_HID_EVENT_SET_IDLE event.
Members
Members Description
uint8_t duration; Idle duration
uint8_t reportID; Report ID
Remarks
None.
5.9.6.6.2.11 USB_DEVICE_HID_EVENT_DATA_SET_PROTOCOL Structure
C
typedef struct {
USB_HID_PROTOCOL_CODE protocol;
} USB_DEVICE_HID_EVENT_DATA_SET_PROTOCOL;
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Description
USB Device HID Set Protocol Event Data Type.
This defines the data type of the data generated to the HID event handler on a USB_DEVICE_HID_EVENT_SET_PROTOCOL
event.
Remarks
None.
5.9.6.6.2.12 USB_DEVICE_HID_EVENT_DATA_SET_REPORT Structure
C
typedef struct {
uint8_t reportType;
uint8_t reportID;
uint16_t reportLength;
} USB_DEVICE_HID_EVENT_DATA_SET_REPORT;
Description
USB Device HID Set Report Event Data Type.
This defines the data type of the data generated to the HID event handler on a USB_DEVICE_HID_EVENT_SET_REPORT
event.
Members
Members Description
uint8_t reportType; Report type
uint8_t reportID; Report ID
uint16_t reportLength; Report Length
Remarks
None.
5.9.6.6.2.13 USB_DEVICE_HID_EVENT_HANDLER Type
C
typedef USB_DEVICE_HID_EVENT_RESPONSE (* USB_DEVICE_HID_EVENT_HANDLER)(USB_DEVICE_HID_INDEX
instanceIndex, USB_DEVICE_HID_EVENT event, USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE
controlTransferHandle, void * pData, uintptr_t context);
Description
USB Device HID Event Handler Function Pointer Type.
This data type defines the required function signature of the USB Device HID Function Driver event handling callback function.
The application must register a pointer to a HID Function Driver events handling function who's function signature (parameter
and return value types) match the types specified by this function pointer in order to receive event call backs from the HID
Function Driver. The function driver will invoke this function with event relevant parameters. The description of the event handler
function parameters is given here.
instanceIndex - Instance index of the HID Function Driver that generated the event.
event - Type of event generated.
controlTransferHandle - Control Transfer Handle for HID function driver events that require application response. The application
should use this handle when calling the USB HID Device Control Transfer functions to respond to the events.
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pData - This parameter should be type casted to a event specific pointer type based on the event that has occurred. Refer to the
USB_DEVICE_HID_EVENT enumeration description for more details.
context - Value identifying the context of the application that registered the event handling function.
Remarks
None.
5.9.6.6.2.14 USB_DEVICE_HID_EVENT_RESPONSE Type
C
typedef void USB_DEVICE_HID_EVENT_RESPONSE;
Description
USB Device HID Function Driver Event Handler Response Type
This is the return type of the HID Function Driver event handler.
Remarks
None.
5.9.6.6.2.15 USB_DEVICE_HID_INDEX Type
C
typedef uintptr_t USB_DEVICE_HID_INDEX;
Description
USB Device HID Driver Index Numbers
This uniquely identifies a HID Function Driver instance.
Remarks
None.
5.9.6.6.2.16 USB_DEVICE_HID_INIT Structure
C
typedef struct {
size_t hidReportDescriptorSize;
void * hidReportDescriptor;
size_t queueSizeReportSend;
size_t queueSizeReportReceive;
} USB_DEVICE_HID_INIT;
Description
USB Device HID Function Driver Initialization Data Structure
This data structure must be defined for every instance of the HID function driver. It is passed to the HID function driver, by the
Device Layer, at the time of initialization. The funcDriverInit member of the Device Layer Function Driver registration table entry
must point to this data structure for an instance of the HID function driver.
Members
Members Description
size_t hidReportDescriptorSize; Size of the HID report descriptor
void * hidReportDescriptor; Pointer to HID report descriptor
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size_t queueSizeReportSend; Report send queue size
size_t queueSizeReportReceive; Report receive queue size
Remarks
None.
5.9.6.6.2.17 USB_DEVICE_HID_RESULT Enumeration
C
typedef enum {
USB_DEVICE_HID_RESULT_OK,
USB_DEVICE_HID_RESULT_ERROR_TRANSFER_QUEUE_FULL,
USB_DEVICE_HID_RESULT_ERROR_INSTANCE_NOT_CONFIGURED,
USB_DEVICE_HID_RESULT_ERROR_INSTANCE_INVALID
} USB_DEVICE_HID_RESULT;
Description
USB Device HID Function Driver USB Device HID Result enumeration.
This enumeration lists the possible USB Device HID Function Driver operation results. These values USB Device HID Library
functions.
Members
Members Description
USB_DEVICE_HID_RESULT_OK The operation was successful
5.9.6.6.2.18 USB_DEVICE_HID_TRANSFER_HANDLE Type
C
typedef uintptr_t USB_DEVICE_HID_TRANSFER_HANDLE;
Description
USB Device HID Function Driver Transfer Handle Definition
This definition defines a USB Device HID Function Driver Transfer Handle. A Transfer Handle is owned by the application but its
value is modified by the USB_DEVICE_HID_ReportSend() and USB_DEVICE_HID_ReportReceive() functions. The transfer
handle is valid for the life time of the transfer and expires when the transfer related event has occurred.
Remarks
None.
5.9.6.6.2.19 USB_DEVICE_HID_EVENT_RESPONSE_NONE Macro
C
#define USB_DEVICE_HID_EVENT_RESPONSE_NONE
Description
USB Device HID Function Driver Event Handler Response None
This is the definition of the HID Function Driver Event Handler Response Type none.
Remarks
Intentionally defined to be empty.
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5.9.6.6.2.20 USB_DEVICE_HID_INSTANCES_NUMBER Macro
C
#define USB_DEVICE_HID_INSTANCES_NUMBER
Description
USB Device HID Maximum Number of Instances
This macro defines the number of instances of the HID Function Driver. For example, if the application needs to implement two
instances of the HID Function Driver (to create composite device) on one USB Device, the macro should be set to 2. Note that
implementing a USB Device that features multiple HID interfaces requires appropriate USB configuration descriptors.
Remarks
None.
5.9.6.6.2.21 USB_DEVICE_HID_QUEUE_DEPTH_COMINED Macro
C
#define USB_DEVICE_HID_QUEUE_DEPTH_COMINED
Description
DOM-IGONORE-BEGIN
5.9.6.6.2.22 USB_DEVICE_HID_TRANSFER_HANDLE_INVALID Macro
C
#define USB_DEVICE_HID_TRANSFER_HANDLE_INVALID ((USB_DEVICE_HID_TRANSFER_HANDLE)(-1))
Description
USB Device HID Function Driver Invalid Transfer Handle Definition
This definition defines a USB Device HID Function Driver Invalid Transfer Handle. A Invalid Transfer Handle is returned by the
USB_DEVICE_HID_ReportReceive() and USB_DEVICE_HID_ReportSend() functions when the request was not successful.
Remarks
None.
5.9.6.7 Files
Files
Name Description
usb_device_hid.h USB HID Function Driver
usb_device_hid_config_template..h USB device HID class configuration definitions template,
Description
5.9.6.7.1 usb_device_hid.h
USB HID Function Driver
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USB HID Function Driver
Enumerations
Name Description
USB_DEVICE_HID_CONTROL_STATUS USB Device HID Function Driver Control Transfer Status
USB_DEVICE_HID_EVENT USB Device HID Function Driver Events
USB_DEVICE_HID_RESULT USB Device HID Function Driver USB Device HID Result enumeration.
Functions
Name Description
USB_DEVICE_HID_ControlReceive This function allows the application to respond to the HID function driver
specific control transfer requests. It allows the application to receive data
from the host in the data stage of the control transfer.
USB_DEVICE_HID_ControlSend This function allows the application to respond to the HID function driver
specific control transfer requests. It allows the application to send data to
the host in the data stage of the control transfer.
USB_DEVICE_HID_ControlStatus This function allows the application to complete the status stage of the the
HID Function Driver specific control transfer request.
USB_DEVICE_HID_EventHandlerSet This function registers a event handler for the specified HID function driver
instance.
USB_DEVICE_HID_ReportReceive This function submits the buffer to HID function driver library to receive a
report from host to device.
USB_DEVICE_HID_ReportSend This function submits the buffer to HID function driver library to send a
report from device to host.
Macros
Name Description
USB_DEVICE_HID_EVENT_RESPONSE_NONE USB Device HID Function Driver Event Handler Response
Type None.
USB_DEVICE_HID_TRANSFER_HANDLE_INVALID USB Device HID Function Driver Invalid Transfer Handle
Definition.
Structures
Name Description
USB_DEVICE_HID_EVENT_DATA_GET_IDLE USB Device HID Get Idle Event Data Type.
USB_DEVICE_HID_EVENT_DATA_GET_PROTOCOL USB Device HID Get Protocol Event Data Type.
USB_DEVICE_HID_EVENT_DATA_GET_REPORT USB Device HID Get Report Event Data Type.
USB_DEVICE_HID_EVENT_DATA_REPORT_RECEIVED USB Device HID Report Received Event Data Type.
USB_DEVICE_HID_EVENT_DATA_REPORT_SENT USB Device HID Report Sent Event Data Type.
USB_DEVICE_HID_EVENT_DATA_SET_DESCRIPTOR USB Device HID Set Descriptor Event Data Type.
USB_DEVICE_HID_EVENT_DATA_SET_IDLE USB Device HID Set Idle Event Data Type.
USB_DEVICE_HID_EVENT_DATA_SET_PROTOCOL USB Device HID Set Protocol Event Data Type.
USB_DEVICE_HID_EVENT_DATA_SET_REPORT USB Device HID Set Report Event Data Type.
USB_DEVICE_HID_INIT USB Device HID Function Driver Initialization Data
Structure
Types
Name Description
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE USB Device HID Function Driver Control Transfer Handle
USB_DEVICE_HID_EVENT_HANDLER USB Device HID Event Handler Function Pointer Type.
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USB_DEVICE_HID_EVENT_RESPONSE USB Device HID Function Driver Event Callback
Response Type
USB_DEVICE_HID_INDEX USB device HID Function Driver Index.
USB_DEVICE_HID_TRANSFER_HANDLE USB Device HID Function Driver Transfer Handle
Definition.
Company
Microchip Technology Inc.
FileName: usb_hid_function_driver.h
5.9.6.7.2 usb_device_hid_config_template..h
USB Device HID Class Configuration Definitions for the Template
These definitions statically define the device HID Class mode of operation.
Macros
Name Description
USB_DEVICE_HID_INSTANCES_NUMBER Specifies the number of HID instances.
USB_DEVICE_HID_QUEUE_DEPTH_COMINED DOM-IGONORE-BEGIN
File Name
usb_device_hid_config_template.h
Company
Microchip Technology Inc.
5.9.7 USB MSD Device Library
5.9.7.1 Introduction
USB Mass Storage Device (MSD) Class Library for Microchip Microcontrollers
This library provides a high-level abstraction of USB Mass Storage Device (MSD) function driver with a convenient C language
interface. This library supports USB Mass Storage Class Bulk-Only Transport, Revision 1.0 from USB Implementers Forum.
Description
The mass storage device class function driver library enables the developers to add mass storage functionality to a device. This
library along with USB device stack and a required media driver can be used to build devices like USB thumb drive and card
readers.
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5.9.7.2 Release Notes
MPLAB Harmony Version: v0.70b USB MSD Device Library Version : 0.01 Alpha Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.9.7.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.9.7.4 Using the Library
5.9.7.4.1 Abstraction Model
The basic software architecture into which USB mass storage device class function driver fits into is depicted in the following
diagram.
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The system makes no direct calls to MSD function driver. It is the USB device layer that initializes and deinitializes the MSD
function driver. The MSD function driver is initialized when host configures the device. It is deinitialized when device exits the
configured state. The device exits the configured state when device is detached from the host or if host issues a bus reset to the
device or if host changes the device configuration to a new value. The MSD function driver task is called from with in the USB
device layer task. This means that MSD function driver task runs at the same priority level as USB device layer task. So, the user
has to register the MSD function driver with USB device layer to allow the USB device layer to make calls to MSD function driver
callback functions at runtime. This registration can be done using compile time configuration.
The system does the media driver initialization and is responsible for calling the media driver tasks. The MSD function driver
interacts with media driver at runtime to perform sector read, write and erase by calling the media driver callback functions. This
requires for the user to register the media driver with the MSD function driver using compile time configuration.
The subsequent sections of this help document describes how to register the MSD function driver and media driver with USB
device layer and MSD function driver respectively.
5.9.7.4.2 How the Library Works
5.9.7.4.2.1 System Interaction
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The above figure shows the system interaction required for MSD function driver. The system has to initialize the media driver
and the USB device layer. There are no direct calls the system has to make to initialize the MSD function driver. The USB device
layer initializes and deinitializes the MSD function driver appropriately at runtime. The system is also responsible for calling the
media driver tasks if applicable.
5.9.7.4.2.2 Object Initialization
Each instance of MSD function driver must be initialized by an object of data type USB_DEVICE_MSD_INIT at compile time. If
there are more than one instance of MSD function driver, then user must create multiple objects of this data type. The Init Object
is then linked to an instance of MSD function driver by adding its pointer to the function driver registration table (Refer to section
"Registering MSD function driver").
The MSD Init Object contains following data about an instance of MSD.
1. Interface number.
2. Bulk-IN endpoint address
3. Bulk-OUT endpoint address
4. Size of the endpoint
5. Number of logical units (LUN) supported by the particular instance of MSD.
6. One or more media driver instance number depending on the number of logical units supported. This is the media driver with
which the particular logical unit will interact.
7. One or more inquiry response structure depending on the number of logical units supported.
8. Pointers to one or more sets of media driver callback functions depending on the number of logical units supported.
The device layer passes the Init Object to MSD function driver when it initializes the function driver.
The following code example shows how to initialize the MSD using Init Object.
const USB_DEVICE_MSD_INIT msdInit =
{
0, /* Interface number */
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1, /* Bulk IN endpoint */
1, /* Bulk OUT endpoint */
64, /* Size of the bulk endpoint */
1, /* Number of logical unit (LUN) */
{
/* Begin first LUN info */
{
/* Media driver instance number */
USB_DEVICE_MDD_INTFLASH_INDEX,
/* Inquiry response for the first logical unit */
{
0x00, /* peripheral device is connected, direct access block device */
0x80, /* removable media */
0x04, /* version = 00=> does not conform to any standard, 4=> SPC-2 */
0x02, /* response is in format specified by SPC-2 */
0x20, /* n-4 = 36-4=32= 0x20 */
0x00, /* sccs etc.*/
0x00, /* bque=1 and cmdque=0,indicates simple queuing 00 is obsolete
but as in case of other device, we are just using 00. */
0x00, /* 00 obsolete, 0x80 for basic task queuing */
{
'M','i','c','r','o','c','h','p'
},
/* this is the T10 assigned Vendor ID */
{
'M','a','s','s',' ','S','t','o','r','a','g','e',' ',' ',' ',' '
},
{
'0','0','0','1'
}
},
/* MDD function callback pointers for first loical uint */
{
&USB_DEVICE_MDD_INTFLASH_Status,
&USB_DEVICE_MDD_INTFLASH_Open,
&USB_DEVICE_MDD_INTFLASH_ReadCapacity,
&USB_DEVICE_MDD_INTFLASH_ReadSectorSize ,
&USB_DEVICE_MDD_INTFLASH_MediaDetect,
&USB_DEVICE_MDD_INTFLASH_SectorRead,
&USB_DEVICE_MDD_INTFLASH_WriteProtectState,
&USB_DEVICE_MDD_INTFLASH_SectorWrite
}
}
}/* End of first LUN info */
{ /* Start of second LUN info */
} /* End of second LUN info */
};
5.9.7.4.2.3 MSD Function Driver Registration
The MSD function driver is registered with the USB device layer using the function registration table structure. The following
code example shows how the MSD function driver can be registered with the USB device layer using function registration table.
The structure variable msdFunctionDriver contains pointers to MSD function driver callbacks.
Example:
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/* The device layer invokes the MSD function driver if the speed is full speed
and the host selects configuration value as 1 */
funcRegistrationTable[1] =
{
{
/* Speed
USB_SPEED_FULL,
/* Configuration value */
1,
/* Interface number */
0,
/* Number of interfaces */
1,
/* MSD instance index */
USBMSD_FUNC_INDEX,
/* MSD driver init object */
(void*)&msdInit,
/* MSD driver */
&msdFunctionDriver
}
};
5.9.7.4.2.4 Media Driver Registration
The MSD function driver makes call to media driver functions at runtime to perform sector erase, read and write operations.
Therefore, the user must register the pointers to media driver callback functions with the MSD function driver . This has to be
done at compile time while initializing the Init Object. Refer to the code example shown in the "Init Object" section for more
information.
5.9.7.5 Library Interface
This section describes the configuration options provided by the MSD function driver to the system and the available data types.
Refer to each section for a detailed description.
5.9.7.5.1 System Configuration Functions
Macros
Name Description
USB_DEVICE_MSD_MAX_INSTANCES This constant sets maximum possible number of instances of USB
device MSD function driver that can be instantiated by using
USB_DEVICE_MSD_Initialize() routine.
USB_DEVICE_MSD_MAX_LUN This constant sets maximum possible number of Logical Unit an
instance of MSD can support.
USB_DEVICE_MSD_MAX_SECTOR_SIZE This constant defines the max possible media sector size supported
by the MSD.
Description
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5.9.7.5.1.1 USB_DEVICE_MSD_MAX_INSTANCES Macro
C
#define USB_DEVICE_MSD_MAX_INSTANCES 1
Remarks
The static implementation supports only one instance. Setting the value of this constant to > 1 has no effect on static
implementations. Only in dynamic implementation of USB device MSD function driver this value can be set > 1.
USB device MSD function driver has to support atleast one instance. Hence, make sure the value of this constant is set to > 0.
Increasing the instance count consumes RAM and can lead to performance degradation.
5.9.7.5.1.2 USB_DEVICE_MSD_MAX_LUN Macro
C
#define USB_DEVICE_MSD_MAX_LUN 1
Description
This constant sets maximum possible number of Logical Unit (LUN) an instance of MSD can support.
Remarks
The value of this macro must not be set to zero. Each instance of USB MSDfunction driver can support atleast one LUN. Hence
set the value to atleast 1.
5.9.7.5.1.3 USB_DEVICE_MSD_MAX_SECTOR_SIZE Macro
C
#define USB_DEVICE_MSD_MAX_SECTOR_SIZE 512
Description
If there are two logical units (LUNs), one that supports sector size 512 bytes and then the other one that supports 1024 bytes,
then set the value of this macro to 1024.
Remarks
none.
5.9.7.5.2 Data Types and Constants
Macros
Name Description
USB_DEVICE_MSD_INTF MSD Interface Class Code
USB_DEVICE_MSD_INTF_SUBCLASS Only scsi transparent is supported.
USB_DEVICE_MSD_PROTOCOL MSD Interface Class Protocol Codes
Structures
Name Description
USB_DEVICE_MSD_MEDIA_FUNCTIONS This structure contains all the media driver callback function
pointers. The MSD driver makes call to these function pointers at run
time to know the status of the media and to read and write the media.
USB_DEVICE_MSD_INIT This structure contains required parameters for MSD initialization.
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USB_DEVICE_MSD_INQUIRY_RESPONSE Inquiry response structure.
USB_DEVICE_MSD_MEDIA_INIT_DATA This structure holds media related data of a particular logical unit.
Description
5.9.7.5.2.1 USB_DEVICE_MSD_INTF Macro
C
#define USB_DEVICE_MSD_INTF 0x08
Description
MSD Interface Class Code
5.9.7.5.2.2 USB_DEVICE_MSD_INTF_SUBCLASS Macro
C
#define USB_DEVICE_MSD_INTF_SUBCLASS 0x06 // Only scsi transparent is supported.
Description
Only scsi transparent is supported.
5.9.7.5.2.3 USB_DEVICE_MSD_PROTOCOL Macro
C
#define USB_DEVICE_MSD_PROTOCOL 0x50
Description
MSD Interface Class Protocol Codes
5.9.7.5.2.4 USB_DEVICE_MSD_MEDIA_FUNCTIONS Structure
C
struct USB_DEVICE_MSD_MEDIA_FUNCTIONS {
SYS_STATUS (* mediaInitState)(SYS_MODULE_OBJ objIndex);
DRV_HANDLE (* open)(const SYS_MODULE_INDEX index, const DRV_IO_INTENT intent);
void (* close)(DRV_HANDLE hClient);
uint32_t (* readCapacity)(DRV_HANDLE drvHandle);
uint32_t (* readSectorSize)(DRV_HANDLE drvHandle);
bool (* mediaDetect)(DRV_HANDLE drvHandle);
bool (* sectorRead)(DRV_HANDLE drvHandle, uint32_t sector_addr, uint8_t * buffer, void *
refHandle, MEDIA_OP_CMPLT_CB callBack);
uint8_t (* writeProtectState)(DRV_HANDLE drvHandle);
bool (* sectorWrite)(DRV_HANDLE drvHandle, uint32_t sector_addr, uint8_t* buffer, void *
refHandle, MEDIA_OP_CMPLT_CB callBack);
};
Description
The user must provide the callback function address of the media at compile time. MSD driver calls these function during run
time to perform media operation or to know the media status.
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Members
Members Description
SYS_STATUS (*
mediaInitState)(SYS_MODULE_OBJ
objIndex);
Media init state.
DRV_HANDLE (* open)(const
SYS_MODULE_INDEX index, const
DRV_IO_INTENT intent);
Function pointer to the MediaInitialize() function of the physical media being used.
void (* close)(DRV_HANDLE hClient); Function pointer for closing the physical media.
uint32_t (* readCapacity)(DRV_HANDLE
drvHandle);
Function pointer to the ReadCapacity() function of the physical media being used.
uint32_t (* readSectorSize)(DRV_HANDLE
drvHandle);
Function pointer to the ReadSectorSize() function of the physical media being
used.
bool (* mediaDetect)(DRV_HANDLE
drvHandle);
Function pointer to the MediaDetect() function of the physical media being used.
bool (* sectorRead)(DRV_HANDLE
drvHandle, uint32_t sector_addr, uint8_t *
buffer, void * refHandle,
MEDIA_OP_CMPLT_CB callBack);
Function pointer to the SectorRead() function of the physical media being used.
uint8_t (* writeProtectState)(DRV_HANDLE
drvHandle);
Function pointer to the WriteProtectState() function of the physical media being
used.
bool (* sectorWrite)(DRV_HANDLE
drvHandle, uint32_t sector_addr, uint8_t*
buffer, void * refHandle,
MEDIA_OP_CMPLT_CB callBack);
Function pointer to the SectorWrite() function of the physical media being used.
Remarks
None.
5.9.7.5.2.5 USB_DEVICE_MSD_INIT Structure
C
struct USB_DEVICE_MSD_INIT {
uint8_t numberOfLogicalUnits;
USB_DEVICE_MSD_MEDIA_INIT_DATA mediaInit[USB_DEVICE_MSD_MAX_LUN];
};
Description
USB MSD init structure.
This structure contains interface number, bulk-IN and bulk-OUT endpoint addresses, endpointSize, number of logical units
supported and pointer to array of structure that contains media initialization.
Members
Members Description
uint8_t numberOfLogicalUnits; Number of logical units supported.
USB_DEVICE_MSD_MEDIA_INIT_DATA
mediaInit[USB_DEVICE_MSD_MAX_LUN];
Media related data
Remarks
This structure must be configured by the user at compile time.
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5.9.7.5.2.6 USB_DEVICE_MSD_INQUIRY_RESPONSE Structure
C
struct USB_DEVICE_MSD_INQUIRY_RESPONSE {
uint8_t peripheral;
uint8_t removable;
uint8_t version;
uint8_t responseDataFormat;
uint8_t additionalLength;
uint8_t sccstp;
uint8_t bqueetc;
uint8_t cmdQue;
uint8_t vendorID[8];
uint8_t productID[16];
uint8_t productRev[4];
};
Description
USB Device MSD inquiry response structure as defined in SCSI Primary Commands - 4.
Members
Members Description
uint8_t peripheral; Peripheral_Qualifier:3; Peripheral_DevType:5;
uint8_t removable; Removable medium bit7 = 0 means non removable, rest reserved
uint8_t version; Version
uint8_t responseDataFormat; b7,b6 Obsolete, b5 Access control co-ordinator, b4 hierarchical addressing
support b3:0 response data format 2 indicates response is in format defined by
spec
uint8_t additionalLength; length in bytes of remaining in standard inquiry data
uint8_t sccstp; b7 SCCS, b6 ACC, b5-b4 TGPS, b3 3PC, b2-b1 Reserved, b0 Protected
uint8_t bqueetc; b7 bque, b6- EncServ, b5-VS, b4-MultiP, b3-MChngr, b2-b1 Obsolete, b0-Addr16
uint8_t cmdQue; b7-b6 Obsolete, b5-WBUS, b4-Sync, b3-Linked, b2 Obsolete,b1 Cmdque, b0-VS
uint8_t vendorID[8]; Vendor ID
uint8_t productID[16]; Product ID
uint8_t productRev[4]; Product Revision
Remarks
None.
5.9.7.5.2.7 USB_DEVICE_MSD_MEDIA_INIT_DATA Structure
C
struct USB_DEVICE_MSD_MEDIA_INIT_DATA {
SYS_MODULE_INDEX instanceIndex;
USB_DEVICE_MSD_INQUIRY_RESPONSE inquiryResponse;
USB_DEVICE_MSD_MEDIA_FUNCTIONS mediaCallBackPtrs;
};
Description
It holds pointer to inquiry response, instance index and pointer to a structure that contains all media callback functions.
Members
Members Description
SYS_MODULE_INDEX instanceIndex; Instance index of the media
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USB_DEVICE_MSD_INQUIRY_RESPONSE
inquiryResponse;
Pointer to inquiry response
USB_DEVICE_MSD_MEDIA_FUNCTIONS
mediaCallBackPtrs;
Callback function pointers of the media
Remarks
An object of this structure must be configured by the user at compile time.
5.9.7.6 Files
Files
Name Description
usb_device_msd.h USB device MSD function driver interface header
usb_device_msd_config_template.h usb device MSD configuration template header file
Description
5.9.7.6.1 usb_device_msd.h
USB MSD function driver interface header
USB device MSD function driver interface header
Macros
Name Description
USB_DEVICE_MSD_INTF MSD Interface Class Code
USB_DEVICE_MSD_INTF_SUBCLASS Only scsi transparent is supported.
USB_DEVICE_MSD_PROTOCOL MSD Interface Class Protocol Codes
Structures
Name Description
USB_DEVICE_MSD_INIT This structure contains required parameters for MSD initialization.
USB_DEVICE_MSD_INQUIRY_RESPONSE Inquiry response structure.
USB_DEVICE_MSD_MEDIA_FUNCTIONS This structure contains all the media driver callback function
pointers. The MSD driver makes call to these function pointers at run
time to know the status of the media and to read and write the media.
USB_DEVICE_MSD_MEDIA_INIT_DATA This structure holds media related data of a particular logical unit.
File Name
usb_device_msd.h
Company
Microchip Technology Inc.
5.9.7.6.2 usb_device_msd_config_template.h
USB device MSD function driver compile time options
This file contains USB device MSD function driver compile time options(macros) that has to be configured by the user. This file is
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a template file and must be used as an example only. This file must not be directly included in the project.
Macros
Name Description
USB_DEVICE_MSD_MAX_INSTANCES This constant sets maximum possible number of instances of USB
device MSD function driver that can be instantiated by using
USB_DEVICE_MSD_Initialize() routine.
USB_DEVICE_MSD_MAX_LUN This constant sets maximum possible number of Logical Unit an
instance of MSD can support.
USB_DEVICE_MSD_MAX_SECTOR_SIZE This constant defines the max possible media sector size supported
by the MSD.
File Name
usb_device_msd_config_template.h
Company
Microchip Technology Incorported
5.9.8 USB Host Layer Library
5.9.8.1 Introduction
Introduces the MPLAB Harmony USB Host Library
Description
The USB Host layer library is part of USB Host stack that is available for the Microchip family of microcontrollers. This library
uses the USB Host Controller Driver to interact with the USB peripheral and therefore cannot operate independently of it. Within
the USB Host stack, the USB Host layer is responsible for enumeration the attached device, matching available class drivers and
maintaining the class drivers.
The USB Host layer library implementation adheres to USB Device Framework of chapter-9 of USB specification 2.0. In the USB
Host stack, the host layer features the following:
• Supports USB Low-Speed, Full-Speed, and Hi-Speed USB Devices
• Based on a modular and event driven architecture.
• Supports the PIC32MX and PIC32MZ families of microcontrollers
• Designed to support multiple device and multiple configurations
• Contains class driver to supports the following type of devices
• CDC
• MSD
• Supports non-blocking operation and is RTOS friendly
• Designed to integrate readily with other Harmony Middleware
• Supports both interrupt and polling operation
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5.9.8.2 Release Notes
MPLAB Harmony Version: v0.70b USB Host Layer Library Version : 0.01 Alpha Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
• The host Stack has not been tested with a Real Time Operating System.
• Attach/Detach behavior has been tested in a limited capacity.
• The host stack only supports interrupt mode operation. Polled mode operation will be added in a future release.
• While running the host stack on PIC32MZ microcontroller, the stack requires 3 seconds to initialize. This is due to a hardware
issue with PIC32MZ USB module.
• MSD Host has been tested with a limited number of commercially available USB Flash Drives.
• MSD Host and the USB Host Layer have not been tested for read/write throughput. This will be done in a future release.
• Host stack has not been tested with low speed devices.
5.9.8.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.9.8.4 Library Interface
Data Types and Constants
Name Description
USB_HOST_HANDLE Handle identifying a client when calling Host layer client
functions.
USB_HOST_INIT Defines the data required to initialize a USB Host Layer
instance.
USB_HOST_HANDLE_INVALID Definition of an invalid USB Host Client Handle
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USB_DEVICE_INFORMATION Defines the USB Device Information data strucutre.
USB_HOST_EVENT_CALLBACK USB Host Event Handler Function Pointer Type.
USB_HOST_EVENT_DATA_VBUS_REQUEST_POWER Defines the data returned along with the
USB_HOST_EVENT_VBUS_REQUEST_POWER
event.
USB_HOST_EVENT_RESPONSE USB Host Event Handler Response Type
USB_HOST_EVENTS Identifies the possible events that the host layer can
generate.
USB_HOST_TPL_FLAGS USB Host Layer Target Peripheral List Entry flags
TPL_MATCH_VID_PID This macro when used in the TPL table will direct the
Host Layer to match the corresponding class driver by
device vendor ID (VID) and product ID (PID).
USB_HOST_0 USB Host module index definitions
USB_HOST_1 This is macro USB_HOST_1.
USB_HOST_ENDPOINT_TABLE_SIZE USB Host Endpoint Table size needed while running the
host on PIC32MX devices.
USB_HOST_EVENT_RESPONSE_NONE USB Host Layer Event Handler Response Type None.
Functions
Name Description
USB_HOST_Close Closes an opened-instance of the USB Host Layer.
USB_HOST_Open Opens the specified Host Layer instance and returns a handle to it
USB_HOST_Deinitialize Deinitializes the specified instance of the USB Host Layer.
USB_HOST_DeviceInformationGet Returns select information about the attached device.
USB_HOST_DeviceIsResumed Checks if the attached USB device has been resumed.
USB_HOST_DeviceIsSuspended Checks if the attached USB device has been suspended.
USB_HOST_DeviceResume Resumes the USB.
USB_HOST_DeviceSuspend Suspends the USB.
USB_HOST_EventCallBackSet Allows a client to identify an event handling function for the host layer to call
back when host layer events are generated.
USB_HOST_Initialize Initializes the USB Host layer instance for the specified instance index.
USB_HOST_OperationDisable Disabled host operation.
USB_HOST_OperationEnable Enables host operation.
USB_HOST_OperationIsEnabled Allows the application to check if the host operation is enabled.
USB_HOST_Status Gets the current status of the USB Host Layer.
USB_HOST_Tasks Maintains the USB Host's state machine. It manages the USB Module driver
and responds to USB Module driver events.
Description
This section describes the Application Programming Interface (API) functions of the USB Host Layer
5.9.8.4.1 Functions
5.9.8.4.1.1 USB_HOST_Close Function
C
void USB_HOST_Close(
USB_HOST_HANDLE hostHandle
);
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Description
This routine closes an opened-instance of the USB Host Layer, invalidating the handle.
Preconditions
The USB_HOST_Initialize routine must have been called for the specified USB Host Layer instance.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the Host Layers's open routine
Returns
None
Remarks
After calling this routine, the handle passed in "handle" must not be used with any of the remaining driver routines. A new handle
must be obtained by calling USB_HOST_Open before the caller may use the driver again. This function is thread safe in a RTOS
application.
Usually there is no need for the driver client to verify that the Close operation has completed.
Example
USB_HOST_HANDLE handle; // Returned from USB_HOST_Open
USB_HOST_Close(handle);
5.9.8.4.1.2 USB_HOST_Open Function
C
USB_HOST_HANDLE USB_HOST_Open(
SYS_MODULE_INDEX index,
const DRV_IO_INTENT ioIntent
);
Description
This routine opens the specified Host Layer instance and provides a handle that must be provided to all other client-level
operations to identify the caller and the instance of the host layer. The host layer can be opened exclusively by a client by
specifying the ioIntent as DRV_IO_INTENT_EXCLUSIVE. Any other flag settings will not have an effect on clients interaction
with the host layer.
Preconditions
Function USB_HOST_Initialize must have been called before calling this function.
Parameters
Parameters Description
index Identifier for the object instance to be opened
intent can be DRV_IO_INTENT_EXCLUSIVE which allows a client to open the host
layer exclusively. Any other flags are ignored.
Returns
If successful, the routine returns a valid open-instance handle (a number identifying both the caller and the module instance).
If an error occurs, the return value is USB_HOST_HANDLE_INVALID. Error can occur
• if the number of client ojects allocated via USB_HOST_CLIENTS_NUMBER is
insufficient.
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• if the client is trying to open the host layer but host layer has been opened
exclusively by another client.
• if the host layer instance being opened is not initialized or is
invalid.
Remarks
The handle returned is valid until the USB_HOST_Close routine is called. This routine will NEVER block waiting for hardware.
This function is thread safe in a RTOS application. It should not be called in an ISR.
Example
USB_HOST_HANDLE handle;
handle = USB_HOST_Open(USB_HOST_0, DRV_IO_INTENT_EXCLUSIVE);
if (USB_HOST_HANDLE_INVALID == handle)
{
// Unable to open the driver
// May be the driver is not initialized or the initialization
// is not complete.
}
5.9.8.4.1.3 USB_HOST_Deinitialize Function
C
void USB_HOST_Deinitialize(
SYS_MODULE_OBJ driverObject
);
Description
Deinitializes the specified instance of the USB Host Layer. This function will aslo deinitialize the USB Module driver and hence
stop all USB Host related operation on the bus. All internal data structures will be reset.
Preconditions
Function USB_HOST_Initialize should have been called before calling this function.
Parameters
Parameters Description
object USB Host layer object handle, returned from the USB_HOST_Initialize routine
Returns
None.
Remarks
Once the Initialize operation has been called, the Deinitialize operation must be called before the Initialize operation can be
called again. This routine will NEVER block waiting for hardware.
Example
SYS_MODULE_OBJ object; // Returned from USB_HOST_Initialize
SYS_STATUS status;
USB_HOST_Deinitialize(object);
status = USB_HOST_Status(object);
if (SYS_MODULE_DEINITIALIZED != status)
{
// Check again later if you need to know
// when the driver is deinitialized.
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}
5.9.8.4.1.4 USB_HOST_DeviceInformationGet Function
C
USB_ERROR USB_HOST_DeviceInformationGet(
USB_HOST_HANDLE hostHandle,
uint8_t deviceAddress,
USB_DEVICE_INFORMATION * deviceInfo
);
Description
This function returns select information about the attached device. The application may use this information to update it display
or for other application purposes. The device information is returned in the deviceInformation data structure.
Preconditions
The USB_HOST_Initialize routine must have been called for the specified USB Host Layer instance.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the Host Layers's open routine
address Address of the device.
deviceInformation pointer to a data structure where the device information will be stored
Returns
USB_ERROR_NONE - Function was successful. USB_ERROR_PARAMETER_INVALID - Device address or host handle is
invalid or deviceInformation pointer is NULL.
Remarks
None.
Example
USB_HOST_HANDLE handle; // Returned from USB_HOST_Open
USB_ERROR result;
USB_DEVICE_INFORMATION deviceInfo;
// Get informationa about attached device with address 2
result = USB_HOST_DeviceInformationGet(handle, 2, &deviceInfo);
if(USB_ERROR_NONE == result)
{
// Display the string descriptor of the attached device.
APP_PrintToDisplay(deviceInformation.stringDesciptor);
}
5.9.8.4.1.5 USB_HOST_DeviceIsResumed Function
C
bool USB_HOST_DeviceIsResumed(
USB_HOST_HANDLE hostHandle,
uint8_t deviceAddress
);
Description
This function checks if the attached USB device has been resumed. This function can be called after calling the
USB_HOST_DeviceResume() function to check if resume request has been completed.
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Preconditions
The USB_HOST_Initialize routine must have been called for the specified USB Host Layer instance.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the Host Layers's open routine
address Address of the device.
Returns
true - Device is resumed. false - Device is not resumed or device address or handle is invalid.
Remarks
In cases where the device is connected directly to the USB Module, the bus resume request will be serviced immediately. In
cases where the device is connected to the USB module via a hub, the application must call the
USB_HOST_DeviceIsResumed() function to check if the device has been resumed.
Example
USB_HOST_HANDLE handle; // Returned from USB_HOST_Open
USB_ERROR result;
// Resume the device with address 2
result = USB_HOST_DeviceResume(handle, 2);
if(USB_ERROR_NONE == result)
{
// Wait till device is resumed.
while(!USB_HOST_DeviceIsResumed(handle, 2));
}
5.9.8.4.1.6 USB_HOST_DeviceIsSuspended Function
C
bool USB_HOST_DeviceIsSuspended(
USB_HOST_HANDLE hostHandle,
uint8_t deviceAddress
);
Description
This function checks if the attached USB device has been suspended. This function can be called after calling the
USB_HOST_DeviceSuspend() function to check if suspend request has been completed.
Preconditions
The USB_HOST_Initialize routine must have been called for the specified USB Host Layer instance.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the Host Layers's open routine
address Address of the device.
Returns
true - Device is suspended. false - Device is not suspended or device address or handle is invalid.
Remarks
In cases where the device is connected directly to the USB Module, the bus suspend request will be serviced immediately. In
cases where the device is connected to the USB module via a hub, the application must call the
USB_HOST_DeviceIsSuspended() function to check if the device has been suspended.
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Example
USB_HOST_HANDLE handle; // Returned from USB_HOST_Open
USB_ERROR result;
// Suspend the device with address 2
result = USB_HOST_Device(handle, 2);
if(USB_ERROR_NONE == result)
{
// Wait till device is suspended.
while(!USB_HOST_DeviceIsSuspended(handle, 2));
}
5.9.8.4.1.7 USB_HOST_DeviceResume Function
C
USB_ERROR USB_HOST_DeviceResume(
USB_HOST_HANDLE hostHandle,
uint8_t deviceAddress
);
Description
The function resumes the USB. If address is an address of a device that is connected directly to the USB module, this function
will directly resume the bus. If the address is an address of a device that is connected to the module via a hub, the USB Host
layer will resume the hub port to which this device is connected. The function only places a request to resume the device. The
application must use the USB_HOST_DeviceIsResumeed() function to check if the device resume is complete.
Preconditions
The USB_HOST_Initialize routine must have been called for the specified USB Host Layer instance.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the Host Layers's open routine
address Address of the device.
Returns
USB_ERROR_NONE - The request was accepted successfully. USB_ERROR_PARAMETER_INVALID - The device address or
handle is invalid.
Remarks
In cases where the device is connected directly to the USB Module, the bus resume request will be serviced immediately. In
cases where the device is connected to the USB module via a hub, the application must call the
USB_HOST_DeviceIsResumed() function to check if the device has been resumed.
Example
USB_HOST_HANDLE handle; // Returned from USB_HOST_Open
USB_ERROR result;
// Resume the device with address 2
result = USB_HOST_Device(handle, 2);
if(USB_ERROR_NONE == result)
{
// Wait till device is resumed.
while(!USB_HOST_DeviceIsResumed(handle, 2));
}
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5.9.8.4.1.8 USB_HOST_DeviceSuspend Function
C
USB_ERROR USB_HOST_DeviceSuspend(
USB_HOST_HANDLE hostHandle,
uint8_t deviceAddress
);
Description
The function suspends the USB. If address is an address of a device that is connected directly to the USB module, this function
will directly suspend the bus. If the address is an address of a device that is connected to the module via a hub, the USB Host
layer will suspend the hub port to which this device is connected. The function only places a request to suspend the device. The
application must use the USB_HOST_DeviceIsSuspended() function to check if the device suspend is complete.
Preconditions
The USB_HOST_Initialize routine must have been called for the specified USB Host Layer instance.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the Host Layers's open routine
address Address of the device.
Returns
USB_ERROR_NONE - The request was accepted successfully. USB_ERROR_PARAMETER_INVALID - The device address or
handle is invalid.
Remarks
In cases where the device is connected directly to the USB Module, the bus suspend request will be serviced immediately. In
cases where the device is connected to the USB module via a hub, the application must call the
USB_HOST_DeviceIsSuspended() function to check if the device has been suspended.
Example
USB_HOST_HANDLE handle; // Returned from USB_HOST_Open
USB_ERROR result;
// Suspend the device with address 2
result = USB_HOST_Device(handle, 2);
if(USB_ERROR_NONE == result)
{
// Wait till device is suspended.
while(!USB_HOST_DeviceIsSuspended(handle, 2));
}
5.9.8.4.1.9 USB_HOST_EventCallBackSet Function
C
USB_ERROR USB_HOST_EventCallBackSet(
USB_HOST_HANDLE hostHandle,
USB_HOST_EVENT_CALLBACK callback,
uintptr_t context
);
Description
This function allows a client to identify an event handling function for the host layer to call back when host layer events are
generated.
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The event handler should be set before the client the host layer operation is enabled. The event handler once set, persists until
the client closes the driver or sets another event handler.
Preconditions
The USB_HOST_Initialize routine must have been called for the specified Host Layer instance.
USB_HOST_Open must have been called to obtain a valid opened Host Layer handle.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the host layer's open routine
callback Pointer to the event handler function.
context The value of parameter will be passed back to the client unchanged, when the
eventHandler function is called. It can be used to identify any client specific data
object that identifies the instance of the client module (for example, it may be a
pointer to the client module's state structure).
Returns
USB_ERROR_NONE - Callback function was registered successfully. USB_ERROR_PARAMETER_INVALID - Callback
function was NULL or hostHandle is invalid.
Remarks
None.
Example
// myAppObj is an application specific state data object.
MY_APP_OBJ myAppObj;
USB_HOST_HANDLE usbHostHandle;
// usbHostHandle is the handle returned
// by the USB_HOST_Open function.
// Client registers an event handler with host layer.
USB_HOST_EventCallBackSet( usbHostHandle, APP_USBHostEventHandler,
(uintptr_t)&myAppObj );
USB_HOST_EVENT_RESPONSE APP_USBHostEventHandler(uintptr_t context,
USB_HOST_EVENTS event, void * eventData)
{
switch(event)
{
case USB_HOST_EVENT_UNSUPPORTED_DEVICE:
break;
...
}
return(USB_HOST_EVENT_RESPONSE_NONE);
}
5.9.8.4.1.10 USB_HOST_Initialize Function
C
SYS_MODULE_OBJ USB_HOST_Initialize(
const SYS_MODULE_INDEX index,
const SYS_MODULE_INIT * init
);
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Description
This routine initializes the USB Host Layer instance for the specified instance index, making it ready for clients to open and use
it. The initialization data is specified by the init parameter. The intialization may fail if the number of host layer objects allocated
are insufficient or if the specificed host layer instance is already initialized. This function also initializes the USB Module driver for
host mode operation. The init data structure thus contains information required for driver initialization. Note that initializing the
Host Layer does not enable its operations. This must be done using USB_HOST_OperationEnable() function.
Preconditions
None.
Parameters
Parameters Description
index Identifier for the instance to be initialized
init Pointer to a USB_HOST_INIT data structure containing data necessary to initialize
the driver.
Returns
If successful, returns a valid handle to a driver instance object. Otherwise, returns SYS_MODULE_OBJ_INVALID.
Remarks
This routine must be called before any other USB Host routine is called.
This routine should only be called once during system initialization unless USB_HOST_Deinitialize is called to de-initialize the
Host Layer instance. This routine will NEVER block for hardware access.
Example
// Initializes the host layer for use with PIC32MX devices.
// We assume that the TPL table is already created and has two
// entries.
USB_HOST_TARGET_PERIPHERAL_LIST * tplTable;
USB_HOST_INIT usbHostInit;
SYS_MODULE_OBJ objectHandle;
// Allocate an endpoint table
uint8_t __attribute__((aligned(512))) endpointTable[USB_HOST_ENDPOINT_TABLE_SIZE];
usbHostInit.moduleInit = SYS_MODULE_POWER_RUN_FULL;
// The usbID member of the USB_HOST_INIT data structure
// should be USB_ID_x for PIC32MX devices and should be
// USBHS_ID_x PIC32MZ devices. Typical values are USB_ID_1
// for PIC32MX and USBHS_ID_0 for PIC32MZ devices.
usbHostInit.usbID = USB_ID_1; //for PIC32MX devices
usbHostInit.stopInIdle = false;
usbHostInit.suspendInSleep = false;
usbHostInit.endpointTable = endpointTable;
usbHostInit.interruptSource = INT_SOURCE_USB_1;
usbHostInit.nTPLEntries = 2
usbHostInit.usbSpeed = USB_SPEED_FULL;
usbHostInit.tplTable = tplTable;
objectHandle = USB_HOST_Initialize(USB_HOST_0, (SYS_MODULE_INIT*)usbHostInit);
if (SYS_MODULE_OBJ_INVALID == objectHandle)
{
// Handle error
}
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5.9.8.4.1.11 USB_HOST_OperationDisable Function
C
void USB_HOST_OperationDisable(
USB_HOST_HANDLE hostHandle
);
Description
The function disables host operation. Disabling the host operation will cause the host to ignore attached device. All bus
communication will be halted and USB bus will be suspended.
Preconditions
The USB_HOST_Initialize routine must have been called for the specified USB Host Layer instance.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the Host Layers's open routine
Returns
None
Remarks
This function may not be used in a typical USB Host application. One possible use could be in a case where a fatal system error
has occurred. Once disabled, the Host operation must be enabled again using the USB_HOST_OperationEnable() function.
Example
USB_HOST_HANDLE handle; // Returned from USB_HOST_Open
// Enabled host operation
USB_HOST_OperationDisable(handle);
5.9.8.4.1.12 USB_HOST_OperationEnable Function
C
void USB_HOST_OperationEnable(
USB_HOST_HANDLE hostHandle
);
Description
The function enables host operation. When enabled, the host layer can detect and enumerate attached devices. The application
must call the USB_HOST_OperationIsEnabled() function to check if the operation has completed.
Preconditions
The USB_HOST_Initialize routine must have been called for the specified USB Host Layer instance.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the Host Layers's open routine
Returns
None
Remarks
It is recommended that only on host layer client call this function. Multiple host layer clients calling this may cause indeterministic
behavior.
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Example
USB_HOST_HANDLE handle; // Returned from USB_HOST_Open
// Enabled host operation
USB_HOST_OperationEnable(handle);
// Wait till host operation is enabled.
while(!USB_HOST_OperationIsEnabled(handle));
5.9.8.4.1.13 USB_HOST_OperationIsEnabled Function
C
bool USB_HOST_OperationIsEnabled(
USB_HOST_HANDLE hostHandle
);
Description
The function allows the application to check if the host operation is enabled. This function should be called after the
USB_HOST_OperationEnable() function is called to check if the operation has been enabled.
Preconditions
The USB_HOST_Initialize routine must have been called for the specified USB Host Layer instance.
Parameters
Parameters Description
handle A valid open-instance handle, returned from the Host Layers's open routine
Returns
None.
Remarks
None.
Example
USB_HOST_HANDLE handle; // Returned from USB_HOST_Open
// Enabled host operation
USB_HOST_OperationEnable(handle);
// Wait till host operation is enabled.
while(!USB_HOST_OperationIsEnabled(handle));
5.9.8.4.1.14 USB_HOST_Status Function
C
SYS_STATUS USB_HOST_Status(
SYS_MODULE_OBJ driverObject
);
Description
This routine provides the current status of the USB Host Layer.
Preconditions
Function USB_HOST_Initialize should have been called before calling this function.
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Parameters
Parameters Description
object USB Host Layer object handle, returned from the USB_HOST_Initialize routine
Returns
SYS_STATUS_READY - Indicates that the USB Host layer is ready for operations.
SYS_STATUS_DEINITIALIZED - Indicates that the driver has been de-initialized
Remarks
None.
Example
SYS_MODULE_OBJ object; // Returned from USB_HOST_Initialize
SYS_STATUS status;
status = USB_HOST_Status(object);
if (SYS_STATUS_READY == status)
{
// This means the driver can be opened using the
// USB_HOST_Open() function.
}
5.9.8.4.1.15 USB_HOST_Tasks Function
C
void USB_HOST_Tasks(
SYS_MODULE_OBJ driverObject
);
Description
This routine maintains the USB Host layer's state machine. It manages and the USB Module driver and responds to USB module
driver events. This function should be called from the SYS_Tasks() function.
Preconditions
The USB_HOST_Initialize routine must have been called for the specified USB Host Layer instance.
Parameters
Parameters Description
object Object handle for the specified driver instance (returned from
USB_HOST_Initialize)
Returns
None.
Remarks
This routine is normally not called directly by an application.
Example
SYS_MODULE_OBJ object; // Returned from USB_HOST_Initialize
while (true)
{
USB_HOST_Tasks (object);
// Do other tasks
}
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5.9.8.4.2 Data Types and Constants
5.9.8.4.2.1 USB_HOST_HANDLE Type
C
typedef uintptr_t USB_HOST_HANDLE;
Description
USB Host Client Handle
A USB Host Client Handle is returned by a call to the USB_HOST_Open() function. The handle maintains the relationship
between USB Host Layer and its client. All USB Host Client functions required the client handle to be specified when the
functions are called. A client handle is valid till the the client calls the USB_HOST_Close() function at which point it becomes
invalid.
Remarks
None.
5.9.8.4.2.2 USB_HOST_INIT Structure
C
typedef struct {
SYS_MODULE_INIT moduleInit;
uint8_t usbID;
bool stopInIdle;
bool suspendInSleep;
void * endpointTable;
INT_SOURCE interruptSource;
unsigned int nTPLEntries;
USB_SPEED usbSpeed;
USB_HOST_TARGET_PERIPHERAL_LIST * tplList;
} USB_HOST_INIT;
Description
USB Host Intialization Data Structure
This data type defines the data required to initialize an USB Host Layer Instance. A pointer to a structure of this type is required
by the USB_HOST_Initialize() function.
Members
Members Description
SYS_MODULE_INIT moduleInit; System Module Initialization data
uint8_t usbID; Identifies the Peripheral Library ID of the USB Peripheral to be used by this
instance of the host layer
bool stopInIdle; Identifies the Idle mode behavior. If true the USB module will stop when the
microcontroller enter IDLE mode
bool suspendInSleep; If true, the USB module will automatically suspend when the the microcontroller
enter sleep mode
void * endpointTable; Pointer to an endpoint table whose size should be
USB_HOST_ENDPOINT_TABLE_SIZE number of bytes.
INT_SOURCE interruptSource; Interrupt Peripheral Library ID of the interrupt source of USB module which this
Host layer will control
unsigned int nTPLEntries; Number of entries in the TPL table
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USB_SPEED usbSpeed; Speed at which the module should operate
USB_HOST_TARGET_PERIPHERAL_LIST
* tplList;
Pointer to the TPL table
Remarks
Intentionally defined to be empty.
5.9.8.4.2.3 USB_HOST_HANDLE_INVALID Macro
C
#define USB_HOST_HANDLE_INVALID
Description
USB Host Invalid Client Handle
This is the definition of an invalid USB Host Client Handle. An invalid client handle is returned by the USB_HOST_Open()
function when it was not able to open the USB Host Layer successfully.
Remarks
None.
5.9.8.4.2.4 USB_DEVICE_INFORMATION Structure
C
typedef struct {
uint16_t vid;
uint16_t pid;
uint16_t stringDescriptor[USB_HOST_DEVICE_INFORMATION_STRING_LENGTH];
} USB_DEVICE_INFORMATION;
Description
USB Device Information Structure
This data type defines the USB Device information data structure. This data structure is passed to
USB_HOST_DeviceInformationGet() function to obtain specific information about the device. The application can use this
information to update its display or for other purposes. When processed by the USB_HOST_DeviceInformationGet() function, the
stringDesciptor member of this data structure will contain a NULL terminated string descriptor string in UTF-16 format. The vid
and pid members of the data structure will be populated with VID and PID of the attached device respectively.
Members
Members Description
uint16_t vid; VID of the attached device
uint16_t pid; PID of the attached device
uint16_t
stringDescriptor[USB_HOST_DEVICE_INFORMATION_STRING_LENGTH];
String desciptor string in UTF-16 format. The
string when returned by
USB_HOST_DeviceInformationGet() function will
be NULL terminated.
Remarks
None.
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5.9.8.4.2.5 USB_HOST_EVENT_CALLBACK Type
C
typedef USB_HOST_EVENT_RESPONSE (* USB_HOST_EVENT_CALLBACK)(USB_HOST_EVENTS event, void *
eventData, uintptr_t context);
Description
USB Host Event Handler Function Pointer Type.
This data type defines the required function signature of the USB Host Layer event handling callback function. The application
must register a pointer to a USB Host Event handling function who's function signature (parameter and return value types) match
the types specified by this function pointer in order to receive event call backs from the USB Host Layer. The function driver will
invoke this function with event relevant parameters. The description of the event handler function parameters is given here.
event - Type of event generated.
eventData - This parameter should be type casted to a event specific pointer type based on the event that has occurred. Refer to
the USB_HOST_EVENTS enumeration description for more details.
context - Value identifying the context of the application that registered the event handling function.
Remarks
None.
5.9.8.4.2.6 USB_HOST_EVENT_DATA_VBUS_REQUEST_POWER Structure
C
typedef struct {
uint8_t port;
uint8_t current;
} USB_HOST_EVENT_DATA_VBUS_REQUEST_POWER;
Description
USB Host VBUS Power Request Event Data Structure
This data type defines the data returned along with the USB_HOST_EVENT_VBUS_REQUEST_POWER event.
Members
Members Description
uint8_t port; Port where the device is connected
uint8_t current; Current (in 2mA units) that the device is requesting
Remarks
None.
5.9.8.4.2.7 USB_HOST_EVENT_RESPONSE Type
C
typedef void USB_HOST_EVENT_RESPONSE;
Description
USB Host Event Handler Response Type
This is the return type of the USB Host Layer Event Handler
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Remarks
None.
5.9.8.4.2.8 USB_HOST_EVENTS Enumeration
C
typedef enum {
USB_HOST_EVENT_VBUS_REQUEST_POWER,
USB_HOST_EVENT_UNSUPPORTED_DEVICE,
USB_HOST_EVENT_CANNOT_ENUMERATE
} USB_HOST_EVENTS;
Description
USB Host Events
This enumeration identifies the possible events that the host layer can generate. A Host Layer client should register an event
handler using the USB_HOST_EventCallBackSet() function to receive host layer events. An event may have data associated
with it. The event description before provides details of such cases.
Members
Members Description
5.9.8.4.2.9 USB_HOST_TPL_FLAGS Enumeration
C
typedef enum {
TPL_FLAG_VID_PID = 0x1,
TPL_FLAG_CLASS_SUBCLASS_PROTOCOL = 0x2
} USB_HOST_TPL_FLAGS;
Description
USB Host Layer TPL Table Entry Flags
This type defines the possible flags that can be used when adding an entry into the TPL table. Using the TPL_FLAG_VID_PID
will direct the host layer to match the class driver to the attached device based on the device Vendor ID and the Product ID.
Using the TPL_FLAG_CLASS_SUBCLASS_PROTOCOL will direct the host layer to match the class driver to the attached
device based on the device class, subclass and protocol fields.
Members
Members Description
TPL_FLAG_VID_PID = 0x1 Match by VID and PID
TPL_FLAG_CLASS_SUBCLASS_PROTOCOL
= 0x2
Match by Class, Subclass and Protocol
Remarks
None.
5.9.8.4.2.10 TPL_MATCH_VID_PID Macro
C
#define TPL_MATCH_VID_PID(vid,pid)
Description
USB Host Class Driver Match by VID and PID
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This macro when used in the TPL table will direct the Host Layer to match the corresponding class driver by device vendor ID
and product ID. The applicaton must set the device member of the TPL table entry to this macro is order to match the attached
device to the class driver by device Vendor ID and Product ID.
Remarks
None.
5.9.8.4.2.11 USB_HOST_0 Macro
C
#define USB_HOST_0 0
Description
Driver USB Host Module Index
These constants provide USB Host index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals. These values should be passed into the
USB_HOST_Initialize() and USB_HOST_Open() routines to identify the host layer instance in use.
5.9.8.4.2.12 USB_HOST_1 Macro
C
#define USB_HOST_1 1
Description
This is macro USB_HOST_1.
5.9.8.4.2.13 USB_HOST_ENDPOINT_TABLE_SIZE Macro
C
#define USB_HOST_ENDPOINT_TABLE_SIZE
Description
USB Host Endpoint Table Size
This macro defines the USB Endpoint Table size while running the host layer on PIC32MX devices. The application should
allocate a uint8_t type array of this size. The array should be aligned at a 512 byte boundary.
Remarks
None.
5.9.8.4.2.14 USB_HOST_EVENT_RESPONSE_NONE Macro
C
#define USB_HOST_EVENT_RESPONSE_NONE
Description
USB Host Layer Event Handler Response None
This is the definition of the USB Host Layer Event Handler Response Type None.
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Remarks
Intentionally defined to be empty.
5.9.8.5 Files
Files
Name Description
usb_host.h USB HOST Layer Interface Header
Description
5.9.8.5.1 usb_host.h
USB Host Layer Interface Definition
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
USB HOST layer.
Enumerations
Name Description
USB_HOST_EVENTS Identifies the possible events that the host layer can generate.
USB_HOST_TPL_FLAGS USB Host Layer Target Peripheral List Entry flags
Functions
Name Description
USB_HOST_Close Closes an opened-instance of the USB Host Layer.
USB_HOST_Deinitialize Deinitializes the specified instance of the USB Host Layer.
USB_HOST_DeviceInformationGet Returns select information about the attached device.
USB_HOST_DeviceIsResumed Checks if the attached USB device has been resumed.
USB_HOST_DeviceIsSuspended Checks if the attached USB device has been suspended.
USB_HOST_DeviceResume Resumes the USB.
USB_HOST_DeviceSuspend Suspends the USB.
USB_HOST_EventCallBackSet Allows a client to identify an event handling function for the host layer to call
back when host layer events are generated.
USB_HOST_Initialize Initializes the USB Host layer instance for the specified instance index.
USB_HOST_Open Opens the specified Host Layer instance and returns a handle to it
USB_HOST_OperationDisable Disabled host operation.
USB_HOST_OperationEnable Enables host operation.
USB_HOST_OperationIsEnabled Allows the application to check if the host operation is enabled.
USB_HOST_Status Gets the current status of the USB Host Layer.
USB_HOST_Tasks Maintains the USB Host's state machine. It manages the USB Module driver
and responds to USB Module driver events.
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Macros
Name Description
TPL_MATCH_VID_PID This macro when used in the TPL table will direct the Host Layer to
match the corresponding class driver by device vendor ID (VID) and
product ID (PID).
USB_HOST_0 USB Host module index definitions
USB_HOST_1 This is macro USB_HOST_1.
USB_HOST_ENDPOINT_TABLE_SIZE USB Host Endpoint Table size needed while running the host on
PIC32MX devices.
USB_HOST_EVENT_RESPONSE_NONE USB Host Layer Event Handler Response Type None.
USB_HOST_HANDLE_INVALID Definition of an invalid USB Host Client Handle
Structures
Name Description
USB_DEVICE_INFORMATION Defines the USB Device Information data strucutre.
USB_HOST_EVENT_DATA_VBUS_REQUEST_POWER Defines the data returned along with the
USB_HOST_EVENT_VBUS_REQUEST_POWER
event.
USB_HOST_INIT Defines the data required to initialize a USB Host Layer
instance.
Types
Name Description
USB_HOST_EVENT_CALLBACK USB Host Event Handler Function Pointer Type.
USB_HOST_EVENT_RESPONSE USB Host Event Handler Response Type
USB_HOST_HANDLE Handle identifying a client when calling Host layer client functions.
File Name
usb_host.h
Company
Microchip Technology Incorported
5.9.9 USB CDC Host Library
5.9.9.1 Introduction
Introduces the MPLAB Harmony USB Host CDC Class Driver Library
Description
The USB Host CDC Class Driver library is a part of the USB Host stack that is available for Microchip family of microcontrollers.
This library uses the USB Host Layer to interact with the attached USB CDC device and therefore cannot operate independently
of it. Within the USB Host stack, the CDC Class Driver library is responsible for providing the host application with access to the
functionality of the attached CDC Device.
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The USB Host CDC Class Driver library implementation adheres to revision 1.2 of the USB CDC Specification release. The USB
Host CDC Class Driver provides the following features:
• Support CDC-ACM devices.
• Abstracts CDC function interface details from the application and provides a clear interface to device functions.
• Provides functions to send commands such as Set Line Coding , Get Line Coding to the attached CDC Device.
• Provides functions to read and write data and request serial line notification from the device.
• Generates bus related events to user application and class drivers.
• Provides events to indicate completion and status of class driver functions.
5.9.9.2 Release Notes
MPLAB Harmony Version: v0.70b USB CDC Host Library Version : 0.01 Alpha Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
5.9.9.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
5.9.9.4 Library Interface
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5.9.9.4.1 Functions
Functions
Name Description
USB_HOST_CDC_BreakSend This function sends a request to the attached to update it's break
duration.
USB_HOST_CDC_ControlLineStateSet This function sets the state of the control line connecting the host to
the device.
USB_HOST_CDC_EventHandlerSet This class registers a event handler for the specified CDC class
driver instance.
USB_HOST_CDC_LineCodingGet This function requests line coding from the attached CDC device.
USB_HOST_CDC_LineCodingSet This function sets the line coding of the attached CDC device.
USB_HOST_CDC_Read This function reads data from the attached CDC device.
USB_HOST_CDC_SerialStateNotificationGet This function requests serial state noitification data from the
attached CDC device.
USB_HOST_CDC_Write This function writes data to the attached CDC device.
Description
5.9.9.4.1.1 USB_HOST_CDC_BreakSend Function
C
USB_HOST_CDC_RESULT USB_HOST_CDC_BreakSend(
USB_HOST_CDC_INDEX index,
USB_HOST_CDC_TRANSFER_HANDLE * transferHandle,
uint16_t breakDuration
);
Description
This function sends a request to the attached to update it's break duration. The function schedules a SEND BREAK control
transfer. If successful, the transferHandle parameter will contain a valid transfer handle, else it will contain
USB_HOST_CDC_TRANSFER_HANDLE_INVALID. When completed, the CDC class driver will generate a
USB_HOST_CDC_EVENT_SEND_BREAK_COMPLETE event. The CDC Class driver does not support queuing of control
transfers. If a control transfer is in progress, this function will return with an error.
Preconditions
None.
Parameters
Parameters Description
index CDC Class Driver Instance Index where the request should be scheduled.
transferHandle Pointer to USB_HOST_CDC_TRANSFER_HANDLE type of a variable. This will
contain a valid transfer handle if the request was successful.
breakDuration Break duration.
Returns
USB_HOST_CDC_RESULT_OK - The operation was successful. transferHandle will contain a valid transfer handle.
USB_HOST_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance does not exist.
USB_HOST_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL - Another control transfer is in progress and this transfer
cannot be scheduled. USB_HOST_CDC_RESULT_ERROR_INSTANCE_NOT_READY - The specified instance does not have
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a CDC device associated with it. This can happen if the attached device was disconnected or the set request was called with an
CDC class driver instance that was not attached with a CDC device.
Remarks
None.
Example
// The following code snippet shows an example of scheduling a CDC Class
// Driver Control Line State Set Request.
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_RESULT result;
uint16_t breakDuration;
result = USB_HOST_CDC_BreakSend(USB_HOST_CDC_0,
&transferHandle, breakDuration);
if(USB_HOST_CDC_RESULT_OK != result)
{
// Error handling here
}
// The completion of the set request can be tracked by using the
// USB_HOST_CDC_EVENT_SEND_BREAK_COMPLETE event.
5.9.9.4.1.2 USB_HOST_CDC_ControlLineStateSet Function
C
USB_HOST_CDC_RESULT USB_HOST_CDC_ControlLineStateSet(
USB_HOST_CDC_INDEX index,
USB_HOST_CDC_TRANSFER_HANDLE * transferHandle,
USB_CDC_CONTROL_LINE_STATE * controlLineState
);
Description
This function sets the state of the control line connecting the host to the device. The function schedules a SET CONTROL LINE
STATE control transfer. If successful, the transferHandle parameter will contain a valid transfer handle, else it will contain
USB_HOST_CDC_TRANSFER_HANDLE_INVALID. When completed, the CDC class driver will generate a
USB_HOST_CDC_EVENT_SET_CONTROL_LINE_STATE_COMPLETE event. The CDC Class driver does not support
queuing of control transfers. If a control transfer is in progress, this function will return with an error.
Preconditions
None.
Parameters
Parameters Description
index CDC Class Driver Instance Index where the request should be scheduled.
transferHandle Pointer to USB_HOST_CDC_TRANSFER_HANDLE type of a variable. This will
contain a valid transfer handle if the request was successful.
controlLineState pointer to the buffer containing control line state data to be sent to the device
Returns
USB_HOST_CDC_RESULT_OK - The operation was successful. transferHandle will contain a valid transfer handle.
USB_HOST_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance does not exist.
USB_HOST_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL - Another control transfer is in progress and this transfer
cannot be scheduled. USB_HOST_CDC_RESULT_ERROR_INSTANCE_NOT_READY - The specified instance does not have
a CDC device associated with it. This can happen if the attached device was disconnected or the set request was called with an
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CDC class driver instance that was not attached with a CDC device.
USB_HOST_CDC_RESULT_ERROR_PARAMETER_INVALID - The controlLineState buffer pointer is NULL.
Remarks
None.
Example
// The following code snippet shows an example of scheduling a CDC Class
// Driver Control Line State Set Request.
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_RESULT result;
USB_CDC_HOST_CONTROL_LINE_STATE * buffer;
result = USB_HOST_CDC_ControlLineStateSet(USB_HOST_CDC_0,
&transferHandle, buffer);
if(USB_HOST_CDC_RESULT_OK != result)
{
// Error handling here
}
// The completion of the set request can be tracked by using the
// USB_HOST_CDC_EVENT_SET_CONTROL_LINE_STATE_COMPLETE event.
5.9.9.4.1.3 USB_HOST_CDC_EventHandlerSet Function
C
USB_HOST_CDC_RESULT USB_HOST_CDC_EventHandlerSet(
USB_HOST_CDC_INDEX index,
USB_HOST_CDC_EVENT_HANDLER eventHandler,
uintptr_t context
);
Description
This function registers an application event handler for the specified CDC class driver instance events. The event handler should
be registered before the host layer operation is enabled.
Preconditions
None.
Parameters
Parameters Description
instance Instance of the CDC Class Driver.
eventHandler A pointer to event handler function.
context Application specific context that is returned in the event handler.
Returns
USB_HOST_CDC_RESULT_OK - The operation was successful USB_HOST_CDC_RESULT_ERROR_INSTANCE_INVALID -
The specified instance does not exist. USB_HOST_CDC_RESULT_ERROR_PARAMETER_INVALID - The eventHandler
parameter is NULL
Remarks
None.
Example
// This code snippet shows an example of registering an event handler. Here
// the application specifies the context parameter as a pointer to an
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// application object (appObject) that should be associated with this
// instance of the CDC class driver.
USB_HOST_CDC_RESULT result;
USB_HOST_CDC_EVENT_RESPONSE APP_USBHostCDCEventHandler
(
USB_HOST_CDC_INDEX instanceIndex ,
USB_HOST_CDC_EVENT event ,
void * event, uintptr_t context
)
{
// Event Handling comes here
switch(event)
{
...
}
return(USB_HOST_CDC_EVENT_RESPONSE_NONE);
}
result = USB_HOST_CDC_EventHandlerSet ( 0 ,&APP_EventHandler, (uintptr_t) &appObject);
if(USB_HOST_CDC_RESULT_OK != result)
{
SYS_ASSERT ( false , "invalid event handler class" );
}
5.9.9.4.1.4 USB_HOST_CDC_LineCodingGet Function
C
USB_HOST_CDC_RESULT USB_HOST_CDC_LineCodingGet(
USB_HOST_CDC_INDEX index,
USB_HOST_CDC_TRANSFER_HANDLE * transferHandle,
USB_CDC_LINE_CODING * lineCoding
);
Description
This function requests line coding from the attached CDC device. The function schedules a GET LINE CODING control transfer.
If successful, the transferHandle parameter will contain a valid transfer handle, else it will contain
USB_HOST_CDC_TRANSFER_HANDLE_INVALID. When completed, the CDC class driver will generate a
USB_HOST_CDC_EVENT_GET_LINE_CODING_COMPLETE event. When completed, the lineCoding parameter will contain
the line coding. The CDC Class driver does not support queuing of control transfers. If a control transfer is in progress, this
function will return with an error.
Preconditions
None.
Parameters
Parameters Description
index CDC Class Driver Instance Index where the request should be scheduled.
transferHandle Pointer to USB_HOST_CDC_TRANSFER_HANDLE type of a variable. This will
contain a valid transfer handle if the request was successful.
lineCoding pointer to the buffer where the line coding data will be stored.
Returns
USB_HOST_CDC_RESULT_OK - The operation was successful. transferHandle will contain a valid transfer handle.
USB_HOST_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance does not exist.
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USB_HOST_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL - Another control transfer is in progress and this transfer
cannot be scheduled. USB_HOST_CDC_RESULT_ERROR_INSTANCE_NOT_READY - The specified instance does not have
a CDC device associated with it. This can happen if the attached device was disconnected or the get request was called with an
CDC class driver instance that was not attached with a CDC device.
USB_HOST_CDC_RESULT_ERROR_PARAMETER_INVALID - The lineCoding buffer pointer is NULL.
Remarks
None.
Example
// The following code snippet shows an example of scheduling a CDC Class
// Driver Get Line Coding Request.
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_RESULT result;
USB_CDC_LINE_CODING * buffer;
result = USB_HOST_CDC_LineCodingGet(USB_HOST_CDC_0,
&transferHandle, buffer);
if(USB_HOST_CDC_RESULT_OK != result)
{
// Error handling here
}
// The completion of the get request can be tracked by using the
// USB_HOST_CDC_EVENT_GET_LINE_CODING_COMPLETE event.
5.9.9.4.1.5 USB_HOST_CDC_LineCodingSet Function
C
USB_HOST_CDC_RESULT USB_HOST_CDC_LineCodingSet(
USB_HOST_CDC_INDEX index,
USB_HOST_CDC_TRANSFER_HANDLE * transferHandle,
USB_CDC_LINE_CODING * lineCoding
);
Description
This function sets the line coding of the attached CDC device. The function schedules a SET LINE CODING control transfer. If
successful, the transferHandle parameter will contain a valid transfer handle, else it will contain
USB_HOST_CDC_TRANSFER_HANDLE_INVALID. When completed, the CDC class driver will generate a
USB_HOST_CDC_EVENT_SET_LINE_CODING_COMPLETE event. The lineCoding parameter contain the line coding to be
sent to the attached device. The CDC Class driver does not support queuing of control transfers. If a control transfer is in
progress, this function will return with an error.
Preconditions
None.
Parameters
Parameters Description
index CDC Class Driver Instance Index where the request should be scheduled.
transferHandle Pointer to USB_HOST_CDC_TRANSFER_HANDLE type of a variable. This will
contain a valid transfer handle if the request was successful.
lineCoding pointer to the buffer containing line coding data to be sent to the device
Returns
USB_HOST_CDC_RESULT_OK - The operation was successful. transferHandle will contain a valid transfer handle.
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USB_HOST_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance does not exist.
USB_HOST_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL - Another control transfer is in progress and this transfer
cannot be scheduled. USB_HOST_CDC_RESULT_ERROR_INSTANCE_NOT_READY - The specified instance does not have
a CDC device associated with it. This can happen if the attached device was disconnected or the set request was called with an
CDC class driver instance that was not attached with a CDC device.
USB_HOST_CDC_RESULT_ERROR_PARAMETER_INVALID - The lineCoding buffer pointer is NULL.
Remarks
None.
Example
// The following code snippet shows an example of scheduling a CDC Class
// Driver Set Line Coding Request.
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_RESULT result;
USB_CDC_LINE_CODING * buffer;
result = USB_HOST_CDC_LineCodingSet(USB_HOST_CDC_0,
&transferHandle, buffer);
if(USB_HOST_CDC_RESULT_OK != result)
{
// Error handling here
}
// The completion of the set request can be tracked by using the
// USB_HOST_CDC_EVENT_SET_LINE_CODING_COMPLETE event.
5.9.9.4.1.6 USB_HOST_CDC_Read Function
C
USB_HOST_CDC_RESULT USB_HOST_CDC_Read(
USB_HOST_CDC_INDEX index,
USB_HOST_CDC_TRANSFER_HANDLE * transferHandle,
void * destination,
size_t length
);
Description
This function reads data from the attached CDC device. The function will schedule a read transfer. If successful, the
transferHandle parameter will contain a valid transfer handle, else it will contain
USB_HOST_CDC_TRANSFER_HANDLE_INVALID. When completed, the CDC class driver will generate a
USB_HOST_CDC_EVENT_READ_COMPLETE event. Multiple read requests can be queued. In such a case, the transfer
handle for each request will be unique.
Preconditions
None.
Parameters
Parameters Description
index CDC Class Driver Instance Index where the request should be scheduled.
transferHandle Pointer to USB_HOST_CDC_TRANSFER_HANDLE type of a variable. This will
contain a valid transfer handle if the request was successful.
dest pointer to the buffer where the read data will be stored.
length Amount of data to read (in bytes).
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Returns
USB_HOST_CDC_RESULT_OK - The operation was successful. transferHandle will contain a valid transfer handle.
USB_HOST_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance does not exist.
USB_HOST_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL - The transfer queue is full and the requested transfer
cannot be scheduled. USB_HOST_CDC_RESULT_ERROR_INSTANCE_NOT_READY - The specified instance does not have
a CDC device associated with it. This can happen if the attached device was disconnected or the read function was called with
an CDC class driver instance that was not attached to a CDC device.
USB_HOST_CDC_RESULT_ERROR_PARAMETER_INVALID - The destination buffer pointer is NULL or the length parameter
is zero.
Remarks
None.
Example
// The following code snippet shows an example of scheduling a CDC Class
// Driver read. In this example, the class driver reads 64 bytes from the
// attached device.
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_RESULT result;
uint8_t buffer[64];
result = USB_HOST_CDC_Read(USB_HOST_CDC_0, &transferHandle, buffer, 64);
if(USB_HOST_CDC_RESULT_OK != result)
{
// Error handling here
}
// The completion of the read request can be tracked by using the
// USB_HOST_CDC_EVENT_READ_COMPLETE.
5.9.9.4.1.7 USB_HOST_CDC_SerialStateNotificationGet Function
C
USB_HOST_CDC_RESULT USB_HOST_CDC_SerialStateNotificationGet(
USB_HOST_CDC_INDEX index,
USB_HOST_CDC_TRANSFER_HANDLE * transferHandle,
USB_HOST_CDC_SERIAL_STATE_NOTIFICATION_DATA * dest
);
Description
This function requests serial state noitification data from the attached CDC device. The function will schedule a read transfer
over the CDC notification interface. If successful, the transferHandle parameter will contain a valid transfer handle, else it will
contain USB_HOST_CDC_TRANSFER_HANDLE_INVALID. When completed, the CDC class driver will generate a
USB_HOST_CDC_EVENT_SERIAL_STATE_NOTIFICATION_RECEIVED event. Multiple get requests can be queued. In such
a case, the transfer handle for each request will be unique.
Preconditions
None.
Parameters
Parameters Description
index CDC Class Driver Instance Index where the request should be scheduled.
transferHandle Pointer to USB_HOST_CDC_TRANSFER_HANDLE type of a variable. This will
contain a valid transfer handle if the request was successful.
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dest pointer to the buffer where the serial state notification data should be stored.
Returns
USB_HOST_CDC_RESULT_OK - The operation was successful. transferHandle will contain a valid transfer handle.
USB_HOST_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance does not exist.
USB_HOST_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL - The transfer queue is full and the requested transfer
cannot be scheduled. USB_HOST_CDC_RESULT_ERROR_INSTANCE_NOT_READY - The specified instance does not have
a CDC device associated with it. This can happen if the attached device was disconnected or the get request was called with an
CDC class driver instance that was not attached with a CDC device.
USB_HOST_CDC_RESULT_ERROR_PARAMETER_INVALID - The source buffer pointer is NULL.
Remarks
None.
Example
// The following code snippet shows an example of scheduling a CDC Class
// Driver Serial State Notification Get function.
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_RESULT result;
USB_HOST_CDC_SERIAL_STATE_NOTIFICATION_DATA * buffer;
result = USB_HOST_CDC_SerialStateNotificationGet(USB_HOST_CDC_0,
&transferHandle, buffer);
if(USB_HOST_CDC_RESULT_OK != result)
{
// Error handling here
}
// The completion of the get request can be tracked by using the
// USB_HOST_CDC_EVENT_SERIAL_STATE_NOTIFICATION_RECEIVED.
5.9.9.4.1.8 USB_HOST_CDC_Write Function
C
USB_HOST_CDC_RESULT USB_HOST_CDC_Write(
USB_HOST_CDC_INDEX index,
USB_HOST_CDC_TRANSFER_HANDLE * transferHandle,
void * source,
size_t length
);
Description
This function writes data to the attached CDC device. The function will schedule a write transfer. If successful, the
transferHandle parameter will contain a valid transfer handle, else it will contain
USB_HOST_CDC_TRANSFER_HANDLE_INVALID. When completed, the CDC class driver will generate a
USB_HOST_CDC_EVENT_WRITE_COMPLETE event. Multiple write requests can be queued. In such a case, the transfer
handle for each request will be unique.
Preconditions
None.
Parameters
Parameters Description
index CDC Class Driver Instance Index where the request should be scheduled.
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transferHandle Pointer to USB_HOST_CDC_TRANSFER_HANDLE type of a variable. This will
contain a valid transfer handle if the request was successful.
source pointer to the buffer containing data to be written to the device.
length Amount of data to written (in bytes).
Returns
USB_HOST_CDC_RESULT_OK - The operation was successful. transferHandle will contain a valid transfer handle.
USB_HOST_CDC_RESULT_ERROR_INSTANCE_INVALID - The specified instance does not exist.
USB_HOST_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL - The transfer queue is full and the requested transfer
cannot be scheduled. USB_HOST_CDC_RESULT_ERROR_INSTANCE_NOT_READY - The specified instance does not have
a CDC device associated with it. This can happen if the attached device was disconnected or the write function was called with
an CDC class driver instance that was not attached to a CDC device.
USB_HOST_CDC_RESULT_ERROR_PARAMETER_INVALID - The source buffer pointer is NULL or the length parameter is
zero.
Remarks
None.
Example
// The following code snippet shows an example of scheduling a CDC Class
// Driver Write. In this example, the class driver writes 64 bytes to the
// attached device.
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_RESULT result;
uint8_t buffer[64];
result = USB_HOST_CDC_Write(USB_HOST_CDC_0, &transferHandle, buffer, 64);
if(USB_HOST_CDC_RESULT_OK != result)
{
// Error handling here
}
// The completion of the write request can be tracked by using the
// USB_HOST_CDC_EVENT_WRITE_COMPLETE.
5.9.9.4.2 Data Types and Constants
Enumerations
Name Description
USB_HOST_CDC_EVENT Identifies the possible events that the CDC Class Driver can generate.
USB_HOST_CDC_RESULT USB Host CDC Class Driver CDC Result enumeration.
USB_HOST_CDC_TRANSFER_STATUS USB Host CDC Class Driver Transfer Status enumeration.
Macros
Name Description
USB_HOST_CDC_EVENT_RESPONSE_NONE USB Host CDC Class Driver Event Handler Response Type
None.
USB_HOST_CDC_TRANSFER_HANDLE_INVALID USB Host CDC Class Driver Invalid Transfer Handle
Definition.
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Structures
Name Description
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE USB Host CDC Class Driver
Event Data.
Types
Name Description
USB_HOST_CDC_TRANSFER_HANDLE USB Host CDC Class Driver Transfer Handle
USB_HOST_CDC_EVENT_HANDLER USB Host CDC Class Driver Event Handler Function
Pointer Type.
USB_HOST_CDC_EVENT_RESPONSE USB Host CDC Class Driver Event Callback
Response Type
USB_HOST_CDC_INDEX USB Host CDC Class Driver Index
USB_HOST_CDC_SERIAL_STATE_NOTIFICATION_DATA USB Host Serial State Notification Data Type.
USB_HOST_CDC_CONTROL_LINE_STATE USB Host Control Line State Data Type.
Description
5.9.9.4.2.1 USB_HOST_CDC_EVENT Enumeration
C
typedef enum {
USB_HOST_CDC_EVENT_READ_COMPLETE,
USB_HOST_CDC_EVENT_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_SERIAL_STATE_NOTIFICATION_RECEIVED,
USB_HOST_CDC_EVENT_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_SEND_BREAK_COMPLETE,
USB_HOST_CDC_EVENT_ATTACH,
USB_HOST_CDC_EVENT_DETACH
} USB_HOST_CDC_EVENT;
Description
CDC Class Driver Events
This enumeration identifies the possible events that the CDC Class Driver can generate. The application should register an event
handler using the USB_HOST_CDC_EventHandlerSet() function to receive CDC Class Driver events.
An event may have data associated with it. Events that are generated due to a transfer of data between the host and device are
accompanied by data structures that provide the status of the transfer termination. For example, the
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USB_HOST_CDC_EVENT_SET_LINE_CODING_COMPLETE event is accompanied by a pointer to a
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE data structure. The transferStatus member of this data
structure indicates the success or failure of the transfer. A transfer may fail due to device not responding on the bus, if the device
stalls any stages of the transfer or due to NAK timeouts. The event description provides details on the nature of the event and
the data that is associated with the event.
The following code snippet shows an example event handling scheme for
// This code snippet shows an example event handling scheme for
// CDC Class Driver events.
USB_HOST_CDC_EVENT_RESPONSE APP_USBHostCDCEventHandler
(
USB_HOST_CDC_INDEX index,
USB_HOST_CDC_EVENT event,
void * eventData,
uintptr_t context
)
{
uint8_t deviceAddress;
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE * setLineCodingEventData;
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE * getLineCodingEventData;
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE * setControlLineStateEventData;
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE * sendBreakEventData;
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE * readCompleteEventData;
USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE * writeCompleteEventData;
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED *
serialStateNotificationEventData;
switch(event)
{
case USB_HOST_CDC_EVENT_ATTACH:
// The event data in this case is the address of the
// attached device.
deviceAddress = (uint8_t *)eventData;
break;
case USB_HOST_CDC_EVENT_DETACH:
// This means the device was detached. There is no event data
// associated with this event.
break;
case USB_HOST_CDC_EVENT_SET_LINE_CODING_COMPLETE:
// This means the Set Line Coding request completed. We can
// find out if the request was successful.
setLineCodingEventData =
(USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE *)eventData;
if(setLineCodingEventData->transferStatus
== USB_HOST_CDC_TRANSFER_STATUS_ERROR)
{
// This means there transfer terminated because of an
// error.
}
break;
case USB_HOST_CDC_EVENT_GET_LINE_CODING_COMPLETE:
// This means the Get Line Coding request completed. We can
// find out if the request was successful.
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getLineCodingEventData =
(USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE *)eventData;
if(getLineCodingEventData->transferStatus
== USB_HOST_CDC_TRANSFER_STATUS_ERROR)
{
// This means there transfer terminated because of an
// error.
}
case USB_HOST_CDC_EVENT_SET_CONTROL_LINE_STATE_COMPLETE:
// This means the Set Control Line State request completed. We can
// find out if the request was successful.
setControlLineStateEventData =
(USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE *)eventData;
if(setControlLineStateEventData->transferStatus
== USB_HOST_CDC_TRANSFER_STATUS_ERROR)
{
// This means there transfer terminated because of an
// error.
}
break;
case USB_HOST_CDC_EVENT_SEND_BREAK_COMPLETE:
// This means the Send Break request completed. We can
// find out if the request was successful.
sendBreakEventData =
(USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE *)eventData;
if(sendBreakEventData->transferStatus
== USB_HOST_CDC_TRANSFER_STATUS_ERROR)
{
// This means there transfer terminated because of an
// error.
}
break;
case USB_HOST_CDC_EVENT_WRITE_COMPLETE:
// This means the Write request completed. We can
// find out if the request was successful.
writeCompleteEventData =
(USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE *)eventData;
if(writeCompleteEventData->transferStatus
== USB_HOST_CDC_TRANSFER_STATUS_ERROR)
{
// This means there transfer terminated because of an
// error.
}
break;
case USB_HOST_CDC_EVENT_READ_COMPLETE:
// This means the Read request completed. We can
// find out if the request was successful.
readCompleteEventData =
(USB_HOST_CDC_EVENT_DATA_READ_COMPLETE *)eventData;
if(readCompleteEventData->transferStatus
== USB_HOST_CDC_TRANSFER_STATUS_ERROR)
{
// This means there transfer terminated because of an
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// error.
}
break;
case USB_HOST_CDC_EVENT_SERIAL_STATE_NOTIFICATION_RECEIVED:
// This means the Serial State Notification request completed.
// We can find out if the request was successful.
serialStateNotificationEventData =
(USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED *)eventData;
if(serialStateNotificationEventData->transferStatus
== USB_HOST_CDC_TRANSFER_STATUS_ERROR)
{
// This means there transfer terminated because of an
// error.
}
break;
default:
break;
}
return(USB_HOST_CDC_EVENT_RESPONSE_NONE);
}
Members
Members Description
USB_HOST_CDC_EVENT_READ_COMPLETE This event occurs when a CDC Class Driver Read
operation has completed i.e when the data has
been received from the connected CDC device.
This event is generated after the application calls
the USB_HOST_CDC_Read() function. The
eventData parameter in the event call back function
will be of a pointer to a
USB_HOST_CDC_EVENT_DATA_READ_COMPL
ETE
structure. This contains details about the transfer
handle associated with this read request, the
amount of data read and the termination status of
the read request.
USB_HOST_CDC_EVENT_WRITE_COMPLETE This event occurs when a CDC Class Driver Write
operation has completed i.e when the data has
been written to the connected CDC device. This
event is generated after the application calls the
USB_HOST_CDC_Wrte() function. The eventData
parameter in the event call back function will be of a
pointer to a
USB_HOST_CDC_EVENT_DATA_WRITE_COMPL
ETE
structure. This contains details about the transfer
handle associated with this write request, the
amount of data written and the termination status of
the write request.
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USB_HOST_CDC_EVENT_SERIAL_STATE_NOTIFICATION_RECEIVED This event occurs when a CDC Class Driver Serial
State Notification Get operation has completed.
This event is generated after the application calls
the USB_HOST_CDC_SerialStateNotificationGet()
and the device sends a serial state notification to
the host. The eventData parameter in the event call
back function will be of a pointer to a
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE
_NOTIFICATION_RECEIVED
structure. This contains details about the transfer
handle associated with this request, the amount of
data received and the termination status of the get
request.
USB_HOST_CDC_EVENT_GET_LINE_CODING_COMPLETE This event occurs when a CDC Class Driver Get
Line Coding request has completed. This event is
generated after the application calls the
USB_HOST_CDC_LineCodingGet() function and
the device sends the line coding to the host. The
eventData parameter in the event call back function
will be of a pointer to a
USB_HOST_CDC_EVENT_DATA_GET_LINE_CO
DING_COMPLETE
structure. This contains details about the transfer
handle associated with this request, the amount of
data received and the termination status of the get
request.
USB_HOST_CDC_EVENT_SET_LINE_CODING_COMPLETE This event occurs when a CDC Class Driver Set
Line Coding request has completed. This event is
generated after the application calls the
USB_HOST_CDC_LineCodingSet() function and
the device either acknowledged or stalled the
request. The eventData parameter in the event call
back function will be of a pointer to a
USB_HOST_CDC_EVENT_DATA_SET_LINE_COD
ING_COMPLETE
structure. This contains details about the transfer
handle associated with this request, the amount of
data sent and the termination status of the set
request.
USB_HOST_CDC_EVENT_SET_CONTROL_LINE_STATE_COMPLETE This event occurs when a CDC Class Driver Set
Control Line State request has completed. This
event is generated after the application calls the
USB_HOST_CDC_ControlLineStateSet() function
and the device has either acknowledged or stalled
the request. The eventData parameter in the event
call back function will be of a pointer to a
USB_HOST_CDC_EVENT_DATA_SET_CONTROL
_LINE_STATE_COMPLETE
structure. This contains details about the transfer
handle associated with this request, the amount of
data sent and the termination status of the set
request.
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USB_HOST_CDC_EVENT_SEND_BREAK_COMPLETE This event occurs when a CDC Class Driver Send
Break request has completed. This event is
generated after the application calls the
USB_HOST_CDC_BreakSend() function and the
device has either acknowledged or stalled the
request. The eventData parameter in the event call
back function will be of a pointer to a
USB_HOST_CDC_EVENT_DATA_SET_CONTROL
_LINE_STATE_COMPLETE
structure. This contains details about the transfer
handle associated with this request, the amount of
data sent and the termination status of the set
request.
USB_HOST_CDC_EVENT_ATTACH This event occurs when the host layer has
successfully attached the CDC Class Driver
instance to the attached USB CDC device. The
event also indicates that the class driver is fully
initialized and is ready to accept command and
data transfer requests from the application. The
eventData parameter should be interpreted as a
uint8_t pointer to the device address.
USB_HOST_CDC_EVENT_DETACH This event occurs when host layer has detached
the CDC class driver instance from a USB CDC
device. This can happen if the device itself was
detached, or if the device configuration was
changed. There is no event data associated with
this event.
Remarks
None.
5.9.9.4.2.2 USB_HOST_CDC_RESULT Enumeration
C
typedef enum {
USB_HOST_CDC_RESULT_OK,
USB_HOST_CDC_RESULT_ERROR_TRANSFER_QUEUE_FULL,
USB_HOST_CDC_RESULT_ERROR_INSTANCE_INVALID,
USB_HOST_CDC_RESULT_ERROR_INSTANCE_NOT_READY,
USB_HOST_CDC_RESULT_ERROR_PARAMETER_INVALID
} USB_HOST_CDC_RESULT;
Description
USB Host CDC Class Driver Result enumeration.
This enumeration lists the possible USB Host CDC Class Driver operation results. These values are returned by CDC Class
Driver functions.
Members
Members Description
USB_HOST_CDC_RESULT_OK The operation was successful
5.9.9.4.2.3 USB_HOST_CDC_TRANSFER_HANDLE Type
C
typedef uintptr_t USB_HOST_CDC_TRANSFER_HANDLE;
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Description
USB Host CDC Class Driver Transfer Handle
This is returned by the CDC Class driver command and data transfer routines and should be used by the application to track the
transfer especially in cases where transfers are queued.
Remarks
None.
5.9.9.4.2.4 USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE Structure
C
typedef struct {
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_TRANSFER_STATUS transferStatus;
size_t length;
} USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE;
Description
USB Host CDC Class Driver Event Data.
This data type defines the data structure returned by the driver along with the following events:
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED
Members
Members Description
USB_HOST_CDC_TRANSFER_HANDLE
transferHandle;
Transfer handle of this transfer
USB_HOST_CDC_TRANSFER_STATUS
transferStatus;
Termination transfer status
size_t length; Amount of data transferred
Remarks
None.
5.9.9.4.2.5 USB_HOST_CDC_EVENT_DATA_READ_COMPLETE Structure
C
typedef struct {
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_TRANSFER_STATUS transferStatus;
size_t length;
} USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
5.9 USB Library Help MPLAB Harmony Help USB CDC Host Library
5-4216
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE;
Description
USB Host CDC Class Driver Event Data.
This data type defines the data structure returned by the driver along with the following events:
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED
Members
Members Description
USB_HOST_CDC_TRANSFER_HANDLE
transferHandle;
Transfer handle of this transfer
USB_HOST_CDC_TRANSFER_STATUS
transferStatus;
Termination transfer status
size_t length; Amount of data transferred
Remarks
None.
5.9.9.4.2.6 USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE Structure
C
typedef struct {
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_TRANSFER_STATUS transferStatus;
size_t length;
} USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE;
Description
USB Host CDC Class Driver Event Data.
This data type defines the data structure returned by the driver along with the following events:
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED
Members
Members Description
USB_HOST_CDC_TRANSFER_HANDLE
transferHandle;
Transfer handle of this transfer
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5-4217
USB_HOST_CDC_TRANSFER_STATUS
transferStatus;
Termination transfer status
size_t length; Amount of data transferred
Remarks
None.
5.9.9.4.2.7 USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED
Structure
C
typedef struct {
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_TRANSFER_STATUS transferStatus;
size_t length;
} USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE;
Description
USB Host CDC Class Driver Event Data.
This data type defines the data structure returned by the driver along with the following events:
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED
Members
Members Description
USB_HOST_CDC_TRANSFER_HANDLE
transferHandle;
Transfer handle of this transfer
USB_HOST_CDC_TRANSFER_STATUS
transferStatus;
Termination transfer status
size_t length; Amount of data transferred
Remarks
None.
5.9.9.4.2.8 USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE
Structure
C
typedef struct {
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_TRANSFER_STATUS transferStatus;
size_t length;
} USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
5.9 USB Library Help MPLAB Harmony Help USB CDC Host Library
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USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE;
Description
USB Host CDC Class Driver Event Data.
This data type defines the data structure returned by the driver along with the following events:
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED
Members
Members Description
USB_HOST_CDC_TRANSFER_HANDLE
transferHandle;
Transfer handle of this transfer
USB_HOST_CDC_TRANSFER_STATUS
transferStatus;
Termination transfer status
size_t length; Amount of data transferred
Remarks
None.
5.9.9.4.2.9 USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE Structure
C
typedef struct {
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_TRANSFER_STATUS transferStatus;
size_t length;
} USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE;
Description
USB Host CDC Class Driver Event Data.
This data type defines the data structure returned by the driver along with the following events:
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED
Members
Members Description
USB_HOST_CDC_TRANSFER_HANDLE
transferHandle;
Transfer handle of this transfer
5.9 USB Library Help MPLAB Harmony Help USB CDC Host Library
5-4219
USB_HOST_CDC_TRANSFER_STATUS
transferStatus;
Termination transfer status
size_t length; Amount of data transferred
Remarks
None.
5.9.9.4.2.10 USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE Structure
C
typedef struct {
USB_HOST_CDC_TRANSFER_HANDLE transferHandle;
USB_HOST_CDC_TRANSFER_STATUS transferStatus;
size_t length;
} USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE;
Description
USB Host CDC Class Driver Event Data.
This data type defines the data structure returned by the driver along with the following events:
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE, USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE,
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE,
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED
Members
Members Description
USB_HOST_CDC_TRANSFER_HANDLE
transferHandle;
Transfer handle of this transfer
USB_HOST_CDC_TRANSFER_STATUS
transferStatus;
Termination transfer status
size_t length; Amount of data transferred
Remarks
None.
5.9.9.4.2.11 USB_HOST_CDC_EVENT_HANDLER Type
C
typedef USB_HOST_CDC_EVENT_RESPONSE (* USB_HOST_CDC_EVENT_HANDLER)(USB_HOST_CDC_INDEX index,
USB_HOST_CDC_EVENT event, void * eventData, uintptr_t context);
Description
USB Host CDC Class Driver Event Handler Function Pointer Type.
This data type defines the required function signature of the USB Host CDC Class Driver event handling callback function. The
application must register a pointer to a CDC Class Driver events handling function who's function signature (parameter and
return value types) match the types specified by this function pointer in order to receive event call backs from the CDC Class
5.9 USB Library Help MPLAB Harmony Help USB CDC Host Library
5-4220
Driver. The class driver will invoke this function with event relevant parameters. The description of the event handler function
parameters is given here.
instanceIndex - Instance index of the CDC Class Driver that generated the event.
event - Type of event generated.
eventData - This parameter should be type casted to a event specific pointer type based on the event that has occurred. Refer to
the USB_HOST_CDC_EVENT enumeration description for more details.
context - Value identifying the context of the application that was registered along with the event handling function.
Remarks
None.
5.9.9.4.2.12 USB_HOST_CDC_EVENT_RESPONSE Type
C
typedef void USB_HOST_CDC_EVENT_RESPONSE;
Description
USB Host CDC Class Driver Event Handler Response Type
This is the return type of the CDC Class Driver event handler.
Remarks
None.
5.9.9.4.2.13 USB_HOST_CDC_INDEX Type
C
typedef uintptr_t USB_HOST_CDC_INDEX;
Description
USB Host CDC Class Driver Index
This uniquely identifies a CDC Class Driver instance.
Remarks
None.
5.9.9.4.2.14 USB_HOST_CDC_SERIAL_STATE_NOTIFICATION_DATA Type
C
typedef USB_CDC_SERIAL_STATE USB_HOST_CDC_SERIAL_STATE_NOTIFICATION_DATA;
Description
USB Host CDC Serial State Notification Data Type.
This defines the data type for the CDC Serial State. This data is requested from the device over the CDC notification interface.
Remarks
None.
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5.9.9.4.2.15 USB_HOST_CDC_TRANSFER_STATUS Enumeration
C
typedef enum {
USB_HOST_CDC_TRANSFER_STATUS_OK,
USB_HOST_CDC_TRANSFER_STATUS_ERROR
} USB_HOST_CDC_TRANSFER_STATUS;
Description
USB Host CDC Class Driver Transfer Status.
This enumeration lists the possible termination status of CDC class driver transfers. This information is a part of the event data
that is returned along with transfer related events.
Members
Members Description
USB_HOST_CDC_TRANSFER_STATUS_OK The transfer completed successfully. In case of read transfers, either the
requested amount of data was received or the device sent less data
USB_HOST_CDC_TRANSFER_STATUS_ERROR The transfer terminated due to an error. The error could be due to device
malfunction on the bus, a NAK timeout occurred or the device stalled the
request
Remarks
None.
5.9.9.4.2.16 USB_HOST_CDC_EVENT_RESPONSE_NONE Macro
C
#define USB_HOST_CDC_EVENT_RESPONSE_NONE
Description
USB Host CDC Class Driver Event Handler Response None
This is the definition of the CDC Class Driver Event Handler Response Type none.
Remarks
Intentionally defined to be empty.
5.9.9.4.2.17 USB_HOST_CDC_TRANSFER_HANDLE_INVALID Macro
C
#define USB_HOST_CDC_TRANSFER_HANDLE_INVALID ((USB_HOST_CDC_TRANSFER_HANDLE)(-1))
Description
USB Host CDC Class Driver Invalid Transfer Handle Definition
This definition defines a USB Host CDC Class Driver Invalid Transfer Handle. A Invalid Transfer Handle is returned by the CDC
Class Driver data and command transfer routines when the request was not successful.
Remarks
None.
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5.9.9.4.2.18 USB_HOST_CDC_CONTROL_LINE_STATE Type
C
typedef USB_CDC_CONTROL_LINE_STATE USB_HOST_CDC_CONTROL_LINE_STATE;
Description
USB Host CDC Control Line State Data Type.
This defines the data type for the CDC Control Line State. This data is requested from the device over the CDC control interface.
Remarks
None.
5.9.9.5 Files
Files
Name Description
usb_host_cdc.h USB Host CDC Class Driver Interface Header
Description
5.9.9.5.1 usb_host_cdc.h
USB Host CDC Class Driver Interface Definition
This header file contains the function prototypes and definitions of the data types and constants that make up the interface to the
USB Host CDC Class Driver.
Enumerations
Name Description
USB_HOST_CDC_EVENT Identifies the possible events that the CDC Class Driver can generate.
USB_HOST_CDC_RESULT USB Host CDC Class Driver CDC Result enumeration.
USB_HOST_CDC_TRANSFER_STATUS USB Host CDC Class Driver Transfer Status enumeration.
Functions
Name Description
USB_HOST_CDC_BreakSend This function sends a request to the attached to update it's break
duration.
USB_HOST_CDC_ControlLineStateSet This function sets the state of the control line connecting the host to
the device.
USB_HOST_CDC_EventHandlerSet This class registers a event handler for the specified CDC class
driver instance.
USB_HOST_CDC_LineCodingGet This function requests line coding from the attached CDC device.
USB_HOST_CDC_LineCodingSet This function sets the line coding of the attached CDC device.
USB_HOST_CDC_Read This function reads data from the attached CDC device.
USB_HOST_CDC_SerialStateNotificationGet This function requests serial state noitification data from the
attached CDC device.
USB_HOST_CDC_Write This function writes data to the attached CDC device.
5.9 USB Library Help MPLAB Harmony Help USB CDC Host Library
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Macros
Name Description
USB_HOST_CDC_EVENT_RESPONSE_NONE USB Host CDC Class Driver Event Handler Response Type
None.
USB_HOST_CDC_TRANSFER_HANDLE_INVALID USB Host CDC Class Driver Invalid Transfer Handle
Definition.
Structures
Name Description
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COMPLETE USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICATION_RECEIVED USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STATE_COMPLETE USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMPLETE USB Host CDC Class Driver
Event Data.
USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE USB Host CDC Class Driver
Event Data.
Types
Name Description
USB_HOST_CDC_CONTROL_LINE_STATE USB Host Control Line State Data Type.
USB_HOST_CDC_EVENT_HANDLER USB Host CDC Class Driver Event Handler Function
Pointer Type.
USB_HOST_CDC_EVENT_RESPONSE USB Host CDC Class Driver Event Callback
Response Type
USB_HOST_CDC_INDEX USB Host CDC Class Driver Index
USB_HOST_CDC_SERIAL_STATE_NOTIFICATION_DATA USB Host Serial State Notification Data Type.
USB_HOST_CDC_TRANSFER_HANDLE USB Host CDC Class Driver Transfer Handle
File Name
usb_host_cdc.h
Company
Microchip Technology Incorported
5.9 USB Library Help MPLAB Harmony Help USB CDC Host Library
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6 Third-Party Library Help
6 MPLAB Harmony Help
6-4225
6.1 Third-Party Library Overview
6.1.1 Introduction
This topic provides an overview of the Third-Party Libraries in MPLAB Harmony.
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
6.1.2 Release Notes
MPLAB Harmony Version: v0.70b Release Date: 18Nov2013
New This Release:
Nothing to report in this release.
Known Issues:
Nothing to report in this release.
6.1.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
6.1 Third-Party Library Overview MPLAB Harmony Help SW License Agreement
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7 Board Support Packages Help
7 MPLAB Harmony Help
7-4227
7.1 Board Support Packages Overview
7.1.1 Introduction
This topic provides information for the Board Support Package (BSP) in MPLAB Harmony.
Description
A Board Support Package (BSP) provides code and configuration items necessary to support board-specific hardware. A BSP
may be provided for Microchip development or demo boards or may be defined by customers for their own boards (which is
recommended to make it easy to support multiple boards in the future, even of only a single board exists when a project is first
created).
A BSP may contain a board-specific configuration header ("bsp_config.h" and possibly others), a board-specific system
initialization file ("bsp_sys_init.c"), a file containing board-specific ISR implementations ("bsp_sys_int.c"), a board-specific system
"tasks" routine (implemented in a "bsp_sys_tasks.c" file), and even board-specific driver implementations (each with it's own
directory).
Everything that is contained within a BSP can be either used by or replaced by application specific items if desired. For example,
the application may configure the system initialization routine ("SYS_Initialize") to directly call a board-specific initialization
routine (called "BSP_Initialize") or it can use the BSP-specific initialization routine as an example from which to start developing
application-specific board initialization code. Normally, Microchip demo applications will use the BSP code directly to avoid
duplication of board-specific code.
7.1.2 Configuration
This topic describes the BSP configuration header options.
Description
A BSP configuration header defines configuration options that are "fixed" by the board. That is, any option that cannot be
changed unless the hardware on the board is changed may be defined in a BSP's "bsp_config.h" file (or in a file included by it).
This will normally include board parameters such as the oscillator frequency for a fixed-frequency oscillator or convenient names
by which board-specific features may be identified (such as which pins connect to switches or LEDs). It may also include options
for libraries and drivers that can be used by an application running on that board that are "fixed" by the hardware on the board.
However, it may not define all options necessary for a library, only the board-specific options. Application-specific headers may
include BSP-specific headers to define the board-hardware-specific options or it may define them itself, thus overriding a BSP's
options.
7.1 Board Support Packages Overview MPLAB Harmony Help Board Drivers
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7.1.3 Board Drivers
This topic describes the board drivers of the BSP.
Description
Some peripheral hardware may not be directly built into the microcontroller. For example, devices such as external CODECs,
EEPROMs, etc, may be built onto a board and will not be available as peripherals in the microcontroller. Devices such as these
still need device drivers and these drivers still need to follow the MPLAB harmony driver architecture. However, they will not
normally be provided as part of the standard MPLAB Harmony driver set for Microchip microcontrollers. Instead, all files related
to drivers for devices mounted on Microchip demo and development boards will be contained within the "bsp/drivers" directory.
They will otherwise, follow the same rules as all other MPLAB Harmony device drivers.
7.1.4 System Initialization
This topic describes BSP system initialization.
Description
Normally, an application will define or configure the “SYS_Initialize” routine in any way that is necessary to initialize the system
as desired. However, board-specific initialization may be necessary. When it is, a BSP must implement a board-specific
initialization routine called "BSP_Initialize" that performs any necessary low-level board initialization necessary to support normal
system operation. The "BSP_Initialize" routine may have an associated "initialization" structure, a pointer to which may be
passed in as a parameter, to define any application-specific parameters necessary to initialize any low-level board hardware.
Low-level board hardware may be things like power subsystems, bus enable signals, or other items necessary for basic board
operations. It should not include the initialization of board-specific drivers as that is done separately. However, a BSP may define
initialization data used to initialize board-specific drivers if that data is "fixed" by the board.
7.1.5 ISR Implementation
This topic describes BSP ISR implentation.
Description
Like the SYS_Initialize routine, an ISR may be implemented by an application in any way necessary to support the desired
system behavior. Unlike the initialization support, a BSP-specific ISR implementation should never be called by the
application-specific ISR implementation. It must either be used exactly as defined by the BSP or the application's system
interrupt support must define its own ISR implementation. If the application defines its own implementation, the BSP ISR can be
used as an example.
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7.2 Explorer 16 PIC32MX795F512L BSP Library
7.2.1 Introduction
Explorer 16 PIC32MX795F512L BSP Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the Explorer 16 PIC32MX795F512L BSP Library that is available on the Microchip
family of microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module
without the necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller
variant to another.
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
7.2.2 Release Notes
MPLAB Harmony Version: v0.70b Explorer 16 PIC32MX795F512L BSP Library Version : 0.51.03b Release Date:
18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
7.2.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
7.2 Explorer 16 PIC32MX795F512L BSP MPLAB Harmony Help SW License Agreement
7-4230
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
7.2.4 Using the Library
This topic describes the basic architecture of the Explorer 16 PIC32MX795F512L BSP Library and provides information and
examples on how to use it.
Interface Header File: bsp_config.h
The interface to the Explorer 16 PIC32MX795F512L BSP library is defined in the "bsp_config.h" header file. Any C language
source (.c) file that uses the Explorer 16 PIC32MX795F512L BSP library should include "bsp_config.h".
7.2.4.1 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the Explorer 16 PIC32MX795F512L BSP Library module.
Library Interface Section Description
Initialization Functions This section provides initialization functions.
LED Control Functions This section provides functions for LED Control.
Other Functions This section provides additional functions for this API.
Data Types and Constants This section provides various definitions describing this API.
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7.3 PIC32 USB Starter Kit II BSP Library
7.3.1 Introduction
PIC332 USB Starter Kit II BSP Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the PIC32 USB Starter Kit II Library that is available on the Microchip family of
microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module without the
necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller variant to
another.
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
7.3.2 Release Notes
MPLAB Harmony Version: v0.70b PIC32 USB Starter Kit II BSP Library Version : 0.51.03b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
7.3.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
7.3 PIC32 USB Starter Kit II BSP Library MPLAB Harmony Help SW License Agreement
7-4232
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
7.3.4 Using the Library
This topic describes the basic architecture of the PIC32 USB Starter Kit II BSP Library and provides information and examples
on how to use it.
Interface Header File: bsp_config.h
The interface to the PIC32 USB Starter Kit II BSP Library is defined in the "bsp_config.h" header file. Any C language source (.c)
file that uses the PIC32 USB Starter Kit II BSP Library should include "bsp_config.h".
7.3.4.1 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the PIC32 USB Starter Kit II Library module.
Library Interface Section Description
Initialization Functions This section provides initialization functions.
LED Control Functions This section provides functions for LED Control.
Other Functions This section provides additional functions for this API.
Data Types and Constants This section provides various definitions describing this API.
7.3 PIC32 USB Starter Kit II BSP Library MPLAB Harmony Help Using the Library
7-4233
7.4 PIC32MX USB Audio BSP Library
7.4.1 Introduction
PIC32MX USB Audio BSP Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the PIC32MX USB Audio BSP Library that is available on the Microchip family of
microcontrollers with a convenient C language interface. It can be used to simplify low-level access to the module without the
necessity of interacting directly with the module's registers, there by hiding differences from one microcontroller variant to
another.
Description
Note: This information was not available at time of release and will be provided in a future release of MPLAB Harmony.
7.4.2 Release Notes
MPLAB Harmony Version: v0.70b PIC32MX USB Audio BSP Library Version : 0.51.03b Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
7.4.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
7.4 PIC32MX USB Audio BSP Library MPLAB Harmony Help SW License Agreement
7-4234
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
7.4.4 Using the Library
This topic describes the basic architecture of the PIC32MX USB Audio BSP Library and provides information and examples on
how to use it.
Interface Header File: bsp_config.h
The interface to the PIC32MX USB Audio BSP Library is defined in the "bsp_config.h" header file. Any C language source (.c)
file that uses the PIC32MX USB Audio BSP Library should include "bsp_config.h".
7.4.4.1 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the PIC32MX USB Audio BSP Library module.
Library Interface Section Description
Initialization Functions This section provides initialization functions.
LED Control Functions This section provides functions for LED Control.
Other Functions This section provides additional functions for this API.
Data Types and Constants This section provides various definitions describing this API.
7.4 PIC32MX USB Audio BSP Library MPLAB Harmony Help Using the Library
7-4235
7.5 PIC32MZ Embedded Connectivity (EC) Starter
Kit BSP Library
7.5.1 Introduction
PIC32MZ Embedded Connectivity (EC) Starter Kit BSP Library
for
Microchip Microcontrollers
This library provides a low-level abstraction of the PIC32MZ Embedded Connectivity (EC) Starter Kit BSP Library that is
available on the Microchip family of microcontrollers with a convenient C language interface. It can be used to simplify low-level
access to the module without the necessity of interacting directly with the module's registers, there by hiding differences from
one microcontroller variant to another.
Description
Note: This information was not available at time of release and will be added in a future release of MPLAB Harmony.
7.5.2 Release Notes
MPLAB Harmony Version: v0.70b PIC32MZ Embedded Connectivity (EC) Starter Kit BSP Library Version : 0.51.03b
Release Date: 18Nov2013
New This Release:
This is the first release of the library. The interface can change in the beta and\or 1.0 release.
Known Issues:
Nothing to report in this release.
7.5.3 SW License Agreement
(c) 2013 Microchip Technology Inc.
Microchip licenses this software to you solely for use with Microchip products. The software is owned by Microchip and its
licensors, and is protected under applicable copyright laws. All rights reserved.
SOFTWARE IS PROVIDED "AS IS" MICROCHIP EXPRESSLY DISCLAIMS ANY WARRANTY OF ANY KIND, WHETHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
7.5 PIC32MZ Embedded Connectivity (EC) MPLAB Harmony Help SW License Agreement
7-4236
FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL MICROCHIP BE LIABLE FOR
ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, HARM TO
YOUR EQUIPMENT, COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
CONTRIBUTION, OR OTHER SIMILAR COSTS.
To the fullest extent allowed by law, Microchip and its licensors liability shall not exceed the amount of fees, if any, that you have
paid directly to Microchip to use this software.
MICROCHIP PROVIDES THIS SOFTWARE CONDITIONALLY UPON YOUR ACCEPTANCE OF THESE TERMS.
7.5.4 Using the Library
This topic describes the basic architecture of the PIC32MZ Embedded Connectivity (EC) Starter Kit BSP Library and provides
information and examples on how to use it.
Interface Header File: bsp_config.h
The interface to the PIC32MZ Embedded Connectivity (EC) Starter Kit BSP Library is defined in the "bsp_config.h" header file.
Any C language source (.c) file that uses the PIC32MZ Embedded Connectivity (EC) Starter Kit BSP Library should include
"bsp_config.h".
7.5.4.1 Library Overview
The library interface routines are divided into various sub-sections, each of sub-section addresses one of the blocks or the
overall operation of the PIC32MZ Embedded Connectivity (EC) Starter Kit BSP Library module.
Library Interface Section Description
Initialization Functions This section provides initialization functions.
LED Control Functions This section provides functions for LED Control.
Other Functions This section provides additional functions for this API.
Data Types and Constants This section provides various definitions describing this API.
7.5 PIC32MZ Embedded Connectivity (EC) MPLAB Harmony Help Using the Library
7-4237
7.6 Library Interface
7.6.1 Initialization Functions
Functions
Name Description
BSP_Initialize Performs the necessary actions to initialize a board
Description
7.6.1.1 BSP_Initialize Function
C
void BSP_Initialize();
Description
This routine performs the neccassary actions to initialize a board
Preconditions
None
Returns
None
7.6.2 LED Control Functions
Functions
Name Description
BSP_SwitchOFFLED Turns OFF specified LED on the board.
BSP_SwitchONLED Turns ON specified LED on the board.
BSP_ToggleLED Toggles specified LED on the board.
BSP_SwitchToggleLED Toggles the onboard LED.
Description
7.6 Library Interface MPLAB Harmony Help LED Control Functions
7-4238
7.6.2.1 BSP_SwitchOFFLED Function
C
void BSP_SwitchOFFLED(
BSP_LED led
);
Description
This fucntion turns OFF specified LED on the board.
Preconditions
BSP should be initialized by calling void BSP_Initialize(void) function.
Parameters
Parameters Description
led LED ID as specified by BSP_LED enum.
Returns
None
7.6.2.2 BSP_SwitchONLED Function
C
void BSP_SwitchONLED(
BSP_LED led
);
Description
This fucntion turns ON specified LED on the board.
Preconditions
BSP should be initialized by calling void BSP_Initialize(void) function.
Parameters
Parameters Description
led LED ID as specified by BSP_LED enum.
Returns
None
7.6.2.3 BSP_ToggleLED Function
C
void BSP_ToggleLED(
BSP_LED led
);
Description
This fucntion Toggles specified LED on the board.
7.6 Library Interface MPLAB Harmony Help LED Control Functions
7-4239
Preconditions
BSP should be initialized by calling void BSP_Initialize(void) function.
Parameters
Parameters Description
led LED ID as specified by BSP_LED enum.
Returns
None
7.6.2.4 BSP_SwitchToggleLED Function
C
void BSP_SwitchToggleLED(
BSP_LED led
);
Description
This routine toggles the onboard LED.
7.6.3 Other Functions
Functions
Name Description
SYSTEMConfigPerformance Configures the system cache and flash wait states for maximum performance.
BSP_ReadCoreTimer Returns the current core timer value.
BSP_ReadSwitch Reads the switch state.
Description
7.6.3.1 SYSTEMConfigPerformance Function
C
unsigned int SYSTEMConfigPerformance(
unsigned int sys_clock
);
Description
This function configures the system cache and flash wait states for maximum performance.
Preconditions
None
7.6 Library Interface MPLAB Harmony Help Other Functions
7-4240
Parameters
Parameters Description
sys_clock Value of system clock
7.6.3.2 BSP_ReadCoreTimer Function
C
uint32_t BSP_ReadCoreTimer();
Description
Returns the current core timer value.
Preconditions
None
7.6.3.3 BSP_ReadSwitch Function
C
BSP_SWITCH_STATE BSP_ReadSwitch(
BSP_SWITCH bspSwitch
);
Description
Reads the switch state.
Preconditions
None
Parameters
Parameters Description
bspSwitch Switch ID as specified by BSP_SWITCH enum.
Return Values
Return Values Description
BSP_SWITCH_STATE_PRESSED Switch is pressed.
BSP_SWITCH_STATE_RELEASED Switch is not pressed.
7.6.4 Data Types and Constants
Enumerations
Name Description
BSP_LED Holds LED numbers.
BSP_SWITCH Holds Switch numbers.
BSP_SWITCH_STATE Holds Switch status.
7.6 Library Interface MPLAB Harmony Help Data Types and Constants
7-4241
Macros
Name Description
BSP_ANALOG_PIN Defines the constant which identifies analog pin
BSP_DIGITAL_PIN Defines the constant which identifies digital pin
BSP_INPUT Defines the constant which identifies input
BSP_OUTPUT Defines the constant which identifies output
Description
7.6.4.1 BSP_ANALOG_PIN Macro
C
#define BSP_ANALOG_PIN PORTS_PIN_MODE_ANALOG
Description
analog Pin Constant
This constant identifies analog pin
7.6.4.2 BSP_DIGITAL_PIN Macro
C
#define BSP_DIGITAL_PIN PORTS_PIN_MODE_DIGITAL
Description
Digital Pin Constant
This constant identifies digital pin
7.6.4.3 BSP_INPUT Macro
C
#define BSP_INPUT 1
Description
Input Constant
This constant identifies input
7.6.4.4 BSP_OUTPUT Macro
C
#define BSP_OUTPUT 0
Description
Output Constant
7.6 Library Interface MPLAB Harmony Help Data Types and Constants
7-4242
This constant identifies output
7.6.4.5 BSP_LED Enumeration
C
typedef enum {
LED_3 = PORTS_BIT_POS_0,
LED_4 = PORTS_BIT_POS_1,
LED_5 = PORTS_BIT_POS_2,
LED_6 = PORTS_BIT_POS_3,
LED_7 = PORTS_BIT_POS_4,
LED_8 = PORTS_BIT_POS_5,
LED_9 = PORTS_BIT_POS_6,
LED_10 = PORTS_BIT_POS_7
} BSP_LED;
Description
LED Number.
This enumeration defines the LED numbers.
Members
Members Description
LED_3 = PORTS_BIT_POS_0 LED 3
LED_4 = PORTS_BIT_POS_1 LED 4
LED_5 = PORTS_BIT_POS_2 LED 5
LED_6 = PORTS_BIT_POS_3 LED 6
LED_7 = PORTS_BIT_POS_4 LED 7
LED_8 = PORTS_BIT_POS_5 LED 8
LED_9 = PORTS_BIT_POS_6 LED 9
LED_10 = PORTS_BIT_POS_7 LED 10
Remarks
None.
7.6.4.6 BSP_SWITCH Enumeration
C
typedef enum {
SWITCH_3 = PORTS_BIT_POS_6,
SWITCH_4 = PORTS_BIT_POS_13,
SWITCH_5 = PORTS_BIT_POS_7,
SWITCH_6 = PORTS_BIT_POS_7
} BSP_SWITCH;
Description
BSP Switch.
This enumeration defines the Switch numbers.
7.6 Library Interface MPLAB Harmony Help Data Types and Constants
7-4243
Members
Members Description
SWITCH_3 = PORTS_BIT_POS_6 SWITCH 3
SWITCH_4 = PORTS_BIT_POS_13 SWITCH 4
SWITCH_5 = PORTS_BIT_POS_7 SWITCH 5
SWITCH_6 = PORTS_BIT_POS_7 SWITCH 6
Remarks
None.
7.6.4.7 BSP_SWITCH_STATE Enumeration
C
typedef enum {
BSP_SWITCH_STATE_PRESSED = 0,
BSP_SWITCH_STATE_RELEASED = 1
} BSP_SWITCH_STATE;
Description
BSP Switch state.
This enumeration defines the switch state.
Members
Members Description
BSP_SWITCH_STATE_PRESSED = 0 Switch pressed
BSP_SWITCH_STATE_RELEASED = 1 Switch not pressed
Remarks
None.
7.6 Library Interface MPLAB Harmony Help Data Types and Constants
7-4244
7.7 Files
Files
Name Description
bsp_config.h Board support configuration file.
Description
7.7.1 bsp_config.h
Board support configuration file.
This contains all the configuration that is required to be done for the application running on PIC32 USB starter kit
Enumerations
Name Description
BSP_LED Holds LED numbers.
BSP_SWITCH Holds Switch numbers.
BSP_SWITCH_STATE Holds Switch status.
Functions
Name Description
BSP_Initialize Performs the necessary actions to initialize a board
BSP_ReadCoreTimer Returns the current core timer value.
BSP_ReadSwitch Reads the switch state.
BSP_SwitchOFFLED Turns OFF specified LED on the board.
BSP_SwitchONLED Turns ON specified LED on the board.
BSP_SwitchToggleLED Toggles the onboard LED.
BSP_ToggleLED Toggles specified LED on the board.
SYSTEMConfigPerformance Configures the system cache and flash wait states for maximum performance.
Macros
Name Description
BSP_ANALOG_PIN Defines the constant which identifies analog pin
BSP_DIGITAL_PIN Defines the constant which identifies digital pin
BSP_INPUT Defines the constant which identifies input
BSP_OUTPUT Defines the constant which identifies output
File Name
bsp_config.h
Company
Microchip Technology Incorported
7.7 Files MPLAB Harmony Help bsp_config.h
7-4245
8 Symbol Reference
8 MPLAB Harmony Help
8-4246
8.1 Macros
Macros
Name Description
DRV_ETHMAC_INDEX_0 Ethernet driver index definitions.
DRV_ETHMAC_INDEX_COUNT Number of valid Ethernet driver indices.
8.1.1 DRV_ETHMAC_INDEX_0 Macro
C
#define DRV_ETHMAC_INDEX_0 0
Description
Ethernet Driver Module Index Numbers
These constants provide Ethernet driver index definitions.
Remarks
These constants should be used in place of hard-coded numeric literals.
These values should be passed into the DRV_ETHMAC_Initialize and DRV_ETHMAC_Open routines to identify the driver
instance in use.
8.1.2 DRV_ETHMAC_INDEX_COUNT Macro
C
#define DRV_ETHMAC_INDEX_COUNT ETH_NUMBER_OF_MODULES
Description
Ethernet Driver Module Index Count
This constant identifies number of valid Ethernet driver indices.
Remarks
This constant should be used in place of hard-coded numeric literals.
This value is derived from part-specific header files defined as part of the peripheral libraries.
8.1 Macros MPLAB Harmony Help DRV_ETHMAC_INDEX_COUNT Macro
8-4247
Index
_
_LIBQ_Q15_cos_Q2_13 function 5-1287
_LIBQ_Q15_sin_Q2_13 function 5-1286
_LIBQ_Q15FromFloat function 5-1298
_LIBQ_Q15FromString function 5-1301
_LIBQ_Q15Rand function 5-1297
_LIBQ_Q16_tan_Q2_29 function 5-1288
_LIBQ_Q16Div function 5-1281
_LIBQ_Q16Exp function 5-1285
_LIBQ_Q16Power function 5-1284
_LIBQ_Q16Sqrt function 5-1281
_LIBQ_Q2_13_acos_Q15 function 5-1292
_LIBQ_Q2_13_asin_Q15 function 5-1289
_LIBQ_Q2_13_atan_Q7_8 function 5-1294
_LIBQ_Q2_13_atan2_Q7_8 function 5-1295
_LIBQ_Q2_29_acos_Q31 function 5-1292
_LIBQ_Q2_29_acos_Q31_Fast function 5-1293
_LIBQ_Q2_29_asin_Q31 function 5-1290
_LIBQ_Q2_29_asin_Q31_Fast function 5-1291
_LIBQ_Q2_29_atan_Q16 function 5-1294
_LIBQ_Q2_29_atan2_Q16 function 5-1296
_LIBQ_Q3_12_log10_Q16 function 5-1282
_LIBQ_Q31_cos_Q2_29 function 5-1287
_LIBQ_Q31_sin_Q2_29 function 5-1286
_LIBQ_Q31FromFloat function 5-1299
_LIBQ_Q31Rand function 5-1297
_LIBQ_Q4_11_ln_Q16 function 5-1283
_LIBQ_Q5_10_log2_Q16 function 5-1283
_LIBQ_Q7_8_tan_Q2_13 function 5-1289
_LIBQ_ToFloatQ15 function 5-1300
_LIBQ_ToFloatQ31 function 5-1300
_LIBQ_ToStringQ15 function 5-1302
_PARM_EQUAL_FILTER structure 5-1265
_PARM_EQUAL_FILTER_16 structure 5-1266
_PARM_EQUAL_FILTER_32 structure 5-1266
_Q0_15 type 5-1305
_Q0_31 type 5-1305
_Q15 type 5-1305
_Q15_16 type 5-1306
_Q15_MAX macro 5-1302
_Q15_MIN macro 5-1303
_Q16 type 5-1306
_Q16_MAX macro 5-1303
_Q16_MIN macro 5-1303
_Q2_13 type 5-1306
_Q2_13_MAX macro 5-1303
_Q2_13_MIN macro 5-1303
_Q2_29 type 5-1306
_Q2_29_MAX macro 5-1303
_Q2_29_MIN macro 5-1303
_Q3_12 type 5-1306
_Q3_12_MAX macro 5-1304
_Q3_12_MIN macro 5-1304
_Q31 type 5-1306
_Q31_MAX macro 5-1304
_Q31_MIN macro 5-1304
_Q4_11 type 5-1307
_Q4_11_MAX macro 5-1304
_Q4_11_MIN macro 5-1304
_Q5_10 type 5-1307
_Q5_10_MAX macro 5-1305
_Q5_10_MIN macro 5-1305
_Q7_8 type 5-1307
_Q7_8_MAX macro 5-1305
_Q7_8_MIN macro 5-1305
_SYS_MSG_H macro 5-3462
_SYS_MSG_OBJECT macro 5-3462
_SYS_TASKS_PRIORITIES enumeration 5-3341
2
2. Creating Your Own Applications 1-21
3
3. Release Notes & Information 1-23
9 MPLAB Harmony Help
a
4
4. Previous Releases 1-32
5
5. Tips and Tricks 1-36
6
6. Glossary 1-37
A
About CAN Protocol 5-1555
Abstract Control Model (ACM) 5-4063
Abstraction Model 5-195, 5-228, 5-255, 5-290, 5-300, 5-310,
5-320, 5-334, 5-344, 5-368, 5-398, 5-419, 5-458, 5-513, 5-553,
5-607, 5-695, 5-1112, 5-1129, 5-1313, 5-3349, 5-3364, 5-3420,
5-3442, 5-3466, 5-3502, 5-3531, 5-3570, 5-3576, 5-3599,
5-3615, 5-3626, 5-3637, 5-3647, 5-3655, 5-3660, 5-3691,
5-3699, 5-3710, 5-3719, 5-3749, 5-3772, 5-3795, 5-3800,
5-3807, 5-3810, 5-3823, 5-3859, 5-3869, 5-3882, 5-3914,
5-3918, 5-3931, 5-3956, 5-4005, 5-4061, 5-4103, 5-4169
accept function 5-3602
Accessing the Result Buffers 5-1373
ADC Driver Library 5-193
ADC Peripheral Library 5-1361
ADC_ACQUISITION_TIME type 5-1438
ADC_BUFFER_MODE enumeration 5-1426
ADC_CHANNEL_GROUP enumeration 5-1423
ADC_CHANNEL123_INPUTS_NEG enumeration 5-1432
ADC_CHANNEL123_INPUTS_POS enumeration 5-1433
ADC_CLOCK_SOURCE enumeration 5-1424
ADC_CONVERSION_CLOCK type 5-1438
ADC_CONVERSION_ORDER enumeration 5-1435
ADC_CONVERSION_TRIGGER_SOURCE enumeration 5-1424
ADC_DMA_ADDRESS_INCREMENT enumeration 5-1435
ADC_DMA_BUFFER_MODE enumeration 5-1431
ADC_DMA_INPUT_BUFFER enumeration 5-1437
ADC_INPUTS_NEGATIVE enumeration 5-1421
ADC_INPUTS_POSITIVE enumeration 5-1433
ADC_INPUTS_SCAN enumeration 5-1428
ADC_MODULE_ID enumeration 5-1420
ADC_MUX enumeration 5-1427
ADC_PAIR enumeration 5-1431
ADC_REFERENCE_INPUT enumeration 5-1430
ADC_RESULT_BUF_STATUS enumeration 5-1427
ADC_RESULT_FORMAT enumeration 5-1430
ADC_RESULT_SIZE enumeration 5-1426
ADC_SAMPLE type 5-1439
ADC_SAMPLES_PER_INTERRUPT enumeration 5-1422
ADC_SAMPLING_MODE enumeration 5-1427
ADC_VOLTAGE_REFERENCE enumeration 5-1420
ADCP Peripheral Library 5-1471
ADCP_CLASS12_INPUT_ID enumeration 5-1507
ADCP_CLOCK_SOURCE enumeration 5-1507
ADCP_DCMP_ID enumeration 5-1513
ADCP_DSH_ID enumeration 5-1509
ADCP_INPUT_ID enumeration 5-1510
ADCP_MODULE_ID enumeration 5-1506
ADCP_ODFLTR_ID enumeration 5-1513
ADCP_ODFLTR_OSR enumeration 5-1514
ADCP_SCAN_TRG_SRC enumeration 5-1514
ADCP_SH_ID enumeration 5-1508
ADCP_SH_MODE enumeration 5-1509
ADCP_TRG_SRC enumeration 5-1515
ADCP_VREF_SOURCE enumeration 5-1507
adhocMode enumeration 5-655
Advanced Data Transfer 5-517
Advanced Font Features 5-1119
Advanced MPFS2 Settings 5-3544
AF_INET macro 5-3609
Alarm Config 5-479
Alarm Functionality 5-466
Alarm Functionality Examples 5-481
Alarm Mode Operations 5-2710
Alpha Blending 5-1116, 5-1123
ALPHA_DELTA macro 5-294
AN_READY type 5-1517
AN_SELECT union 5-1516
Announce TCP/IP Stack Library 5-3569
9 MPLAB Harmony Help
b
ANNOUNCE_MAX_PAYLOAD macro 5-3571
ANNOUNCE_PORT macro 5-3571
Application Interaction 5-3380
Applications Help 3-61
Applications Overview 3-62
Architecture 5-3378
Architecture Overview 5-4132
Arcs 5-1114
ARP Changes 5-3551
ARP TCP/IP Stack Library 5-3574
arp.h 5-3596
arp_app_callbacks structure 5-3595
ARP_CACHE_ENTRIES_97J60 macro 5-3577
ARP_CACHE_ENTRIES_DEFAULT macro 5-3578
ARP_CACHE_ENTRIES_ENCJ60 macro 5-3578
ARP_CACHE_ENTRIES_ENCJ600 macro 5-3578
ARP_CACHE_ENTRIES_MRF24W macro 5-3578
ARP_CACHE_ENTRIES_PIC32INT macro 5-3578
ARP_CACHE_PENDING_ENTRY_TMO macro 5-3578
ARP_CACHE_PENDING_RETRY_TMO macro 5-3579
ARP_CACHE_PERMANENT_QUOTA macro 5-3579
ARP_CACHE_PURGE_QUANTA macro 5-3579
ARP_CACHE_PURGE_THRESHOLD macro 5-3579
ARP_CACHE_SOLVED_ENTRY_TMO macro 5-3579
arp_config.h 5-3597
arp_manager.h 5-3597
ARP_MODULE_CONFIG structure 5-3595
ARP_TASK_PROCESS_RATE macro 5-3579
Assigning Buffer Memory 5-1558
Asynchronous Counter 5-3017
Asynchronous USART Mode 5-3090
Audio Protocol Interface Mode 5-2817
audio_speaker 3-166
AUTH_LOCALIZED_PASSWORD_KEY_LEN macro 5-3826
B
Before You Start 1-2
berekely_api_config.h 5-3613
Berkeley TCP/IP Stack Library 5-3598
berkeley_api.h 5-3613
BERKELEY_MODULE_CONFIG structure 5-3610
Bevels 5-1115
bind function 5-3603
biquad16 structure 5-1264
BLACK macro 5-941
Blocking Applications 3-99
BLUE macro 5-941
BMX Peripheral Library 5-1519
BMX_MODULE_ID enumeration 5-1543
Board Drivers 7-4229
Board Support Packages Help 7-4227
Board Support Packages Overview 7-4228
BRIGHTBLUE macro 5-941
BRIGHTCYAN macro 5-942
BRIGHTGREEN macro 5-942
BRIGHTMAGENTA macro 5-942
BRIGHTRED macro 5-942
BRIGHTYELLOW macro 5-942
BROWN macro 5-942
BSP_ANALOG_PIN macro 7-4242
bsp_config.h 7-4245
BSP_DIGITAL_PIN macro 7-4242
BSP_Initialize function 7-4238
BSP_INPUT macro 7-4242
BSP_LED enumeration 7-4243
BSP_OUTPUT macro 7-4242
BSP_ReadCoreTimer function 7-4241
BSP_ReadSwitch function 7-4241
BSP_SWITCH enumeration 7-4243
BSP_SWITCH_STATE enumeration 7-4244
BSP_SwitchOFFLED function 7-4239
BSP_SwitchONLED function 7-4239
BSP_SwitchToggleLED function 7-4240
BSP_ToggleLED function 7-4239
Building MPFS2 Images 5-3542
Building Projects 4-178
Building Projects Help 4-177
Building the Application 3-109, 3-126, 3-145
9 MPLAB Harmony Help
c
Building the Library 5-202, 5-236, 5-262, 5-291, 5-301, 5-311,
5-326, 5-335, 5-352, 5-377, 5-400, 5-428, 5-482, 5-519, 5-574,
5-609, 5-701, 5-1124, 5-1130, 5-1324, 5-2256, 5-3368, 5-3444,
5-3474, 5-3517, 5-3572, 5-3580, 5-3601, 5-3618, 5-3630,
5-3640, 5-3648, 5-3657, 5-3692, 5-3700, 5-3711, 5-3723,
5-3753, 5-3773, 5-3796, 5-3804, 5-3808, 5-3814, 5-3832,
5-3862, 5-3875, 5-3888, 5-3916, 5-3921, 5-3935, 5-3957
Builiding the Library 5-3532
Bulk and Interrupt Transfers 5-570
BURLYWOOD macro 5-942
Bus Arbiter 5-1522
C
Cache Control 5-1522
Cache Control Operations 5-2431
Cache Line Operations 5-2432
Cache Status Operations 5-2433
Can Bit Time Quanta 5-1556
CAN Peripheral Library 5-1553
CAN_CHANNEL enumeration 5-1620
CAN_CHANNEL_EVENT enumeration 5-1621
CAN_CHANNEL_MASK enumeration 5-1622
CAN_DNET_FILTER_SIZE enumeration 5-1623
CAN_ERROR_STATE enumeration 5-1624
CAN_FILTER enumeration 5-1625
CAN_FILTER_MASK enumeration 5-1627
CAN_FILTER_MASK_TYPE enumeration 5-1627
CAN_FUNCTONAL_MODES enumeration 5-1628
CAN_ID_TYPE enumeration 5-1628
CAN_MODULE_EVENT enumeration 5-1629
CAN_MODULE_ID enumeration 5-1629
CAN_MSG_EID structure 5-1630
CAN_OPERATION_MODES enumeration 5-1630
CAN_RECEIVE_CHANNEL enumeration 5-1631
CAN_RECEIVE_MODES enumeration 5-1631
CAN_RX_DATA_MODE enumeration 5-1632
CAN_RX_DATA_ONLY_SIZE_BYTES macro 5-1636
CAN_RX_MSG_BUFFER union 5-1632
CAN_RX_MSG_SID structure 5-1633
CAN_TIME_SEGMENT_LENGTH enumeration 5-1633
CAN_TX_CHANNEL_STATUS enumeration 5-1634
CAN_TX_MSG_BUFFER union 5-1634
CAN_TX_MSG_SID structure 5-1635
CAN_TX_RTR enumeration 5-1635
CAN_TX_RX_MESSAGE_SIZE_BYTES macro 5-1636
CAN_TXCHANNEL_PRIORITY enumeration 5-1635
cdc_basic 3-167
cdc_com_port_dual 3-154
cdc_com_port_single 3-152
cdc_serial_emulator 3-156
CH_CLR0 macro 5-943
CH_CLR1 macro 5-943
CH_CLR10 macro 5-943
CH_CLR11 macro 5-943
CH_CLR12 macro 5-943
CH_CLR13 macro 5-943
CH_CLR14 macro 5-944
CH_CLR15 macro 5-944
CH_CLR2 macro 5-944
CH_CLR3 macro 5-944
CH_CLR4 macro 5-944
CH_CLR5 macro 5-944
CH_CLR6 macro 5-944
CH_CLR7 macro 5-945
CH_CLR8 macro 5-945
CH_CLR9 macro 5-945
Change Notification 5-3472
Changing the Clock 5-3351
Changing the Default Font 5-1119
Channel Configuration 5-1559
Channel Events 5-1562
Channel Management 5-1743
CHART_MARGIN macro 5-945
CHART_YGRIDCOUNT macro 5-945
CHARTPARAM structure 5-888
Cient Transfer - Core 5-423
ClearPaletteChangeError function 5-827
Client Access 5-422, 5-516
Client Access Operation 5-346
Client Basic Operation 5-346
9 MPLAB Harmony Help
d
Client Block Data Operation 5-348
Client Config 5-480
Client Configuration 5-428
Client Core Functionality 5-196
Client Data Handling 5-4111
Client Functionality 5-608
Client Interaction 5-462
Client Operation 5-373
Client Setup 5-4105
Client Subclass Specific 5-4120
Client Transfer - Advanced 5-425
CLK_PERIPH_BUS_MZ enumeration 5-3361
CLK_SOURCE_PERIPHERAL enumeration 5-3361
Clock Sources 5-2334
Clock System Service Library 5-3347
closesocket function 5-3603
Closing a File 5-3395
CMP_CLOCK_DIVIDE enumeration 5-1716
CMP_CVREF_BANDGAP_SELECT enumeration 5-1716
CMP_CVREF_REFERENCE_SELECT enumeration 5-1717
CMP_CVREF_VALUE enumeration 5-1717
CMP_CVREF_VOLTAGE_SOURCE enumeration 5-1718
CMP_FILTER_CLOCK enumeration 5-1718
CMP_INTERRUPT_EVENT enumeration 5-1719
CMP_INVERTING_INPUT enumeration 5-1719
CMP_MASK_A enumeration 5-1719
CMP_MASK_B enumeration 5-1720
CMP_MASK_C enumeration 5-1721
CMP_MODULE_ID enumeration 5-1721
CMP_NON_INVERTING_INPUT enumeration 5-1722
CMP_SPEED_POWER enumeration 5-1722
Code Examples 5-197
COLOR_DEPTH macro 5-325
Colors 5-1123
Communication Mode 5-2822
Comparator Peripheral Library 5-1667
Comparison of API Names 5-3386
Compression Library 4-181
Configuration 7-4228
Configuring the Application 3-109, 3-127, 3-146
Configuring the Comparator Interrupts 5-1671
Configuring the Driver Library 5-311
Configuring the Hardware 3-67, 3-69, 3-72, 3-74, 3-76, 3-86,
3-88, 3-89, 3-90, 3-109, 3-114, 3-115, 3-116, 3-117, 3-126,
3-131, 3-133, 3-135, 3-145, 3-153, 3-154, 3-156, 3-158, 3-160,
3-161, 3-162, 3-164, 3-165, 3-167, 3-168, 3-169
Configuring the Libraries 3-110, 3-127, 3-146
Configuring the Library 5-202, 5-234, 5-259, 5-290, 5-300,
5-321, 5-335, 5-349, 5-376, 5-400, 5-428, 5-474, 5-519, 5-574,
5-608, 5-701, 5-1123, 5-1130, 5-1322, 5-1380, 5-1480, 5-1526,
5-1566, 5-1748, 5-1866, 5-2089, 5-2175, 5-2205, 5-2256,
5-2294, 5-2336, 5-2434, 5-2488, 5-2601, 5-2666, 5-2690,
5-2712, 5-2766, 5-2823, 5-2903, 5-3021, 5-3101, 5-3182,
5-3322, 5-3352, 5-3366, 5-3424, 5-3443, 5-3474, 5-3516,
5-3532, 5-3571, 5-3577, 5-3600, 5-3616, 5-3627, 5-3638,
5-3648, 5-3656, 5-3661, 5-3691, 5-3700, 5-3710, 5-3720,
5-3749, 5-3773, 5-3796, 5-3801, 5-3807, 5-3814, 5-3824,
5-3860, 5-3872, 5-3884, 5-3914, 5-3920, 5-3933, 5-3957,
5-3985
Configuring the Stack 5-3974
connect function 5-3604
Constants 5-190
Control Transfers 5-565
Controlling the Conversion Process 5-1371
Controlling the Sampling Process 5-1370
Conversion Sequence Examples 5-1375
ConvertColor25 macro 5-945
ConvertColor50 macro 5-946
ConvertColor75 macro 5-946
CopyPageWindow macro 5-946
Core Functionality 5-465, 5-515, 5-1112, 5-1315, 5-2896,
5-3366, 5-3883, 5-3932, 5-3956
Counter Modification 5-465
Creating Your Own USB Device 5-3970
Critical Section Operation 5-1320
Critical Sections 5-3422
CRYPT_AES_CBC_Decrypt function 5-1156
CRYPT_AES_CBC_Encrypt function 5-1157
CRYPT_AES_CTR_Encrypt function 5-1157
CRYPT_AES_CTX structure 5-1161
CRYPT_AES_DIRECT_Decrypt function 5-1158
CRYPT_AES_DIRECT_Encrypt function 5-1158
CRYPT_AES_IvSet function 5-1158
CRYPT_AES_KeySet function 5-1159
9 MPLAB Harmony Help
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CRYPT_ECC_CTX structure 5-1162
CRYPT_ECC_DHE_KeyMake function 5-1146
CRYPT_ECC_DHE_SharedSecretMake function 5-1147
CRYPT_ECC_DSA_HashSign function 5-1147
CRYPT_ECC_DSA_HashVerify function 5-1148
CRYPT_ECC_Free function 5-1148
CRYPT_ECC_Initialize function 5-1148
CRYPT_ECC_KeySizeGet function 5-1149
CRYPT_ECC_PrivateImport function 5-1149
CRYPT_ECC_PublicExport function 5-1150
CRYPT_ECC_PublicImport function 5-1150
CRYPT_ECC_SignatureSizeGet function 5-1150
CRYPT_ERROR_StringGet function 5-1132
CRYPT_HMAC_CTX structure 5-1162
CRYPT_HMAC_DataAdd function 5-1135
CRYPT_HMAC_Finalize function 5-1136
CRYPT_HMAC_SetKey function 5-1136
CRYPT_HUFFMAN_Compress function 5-1145
CRYPT_HUFFMAN_DeCompress function 5-1146
CRYPT_MD5_CTX structure 5-1162
CRYPT_MD5_DataAdd function 5-1159
CRYPT_MD5_Finalize function 5-1160
CRYPT_MD5_Initialize function 5-1161
CRYPT_RNG_BlockGenerate function 5-1143
CRYPT_RNG_CTX structure 5-1162
CRYPT_RNG_Get function 5-1144
CRYPT_RNG_Initialize function 5-1144
CRYPT_RSA_CTX structure 5-1163
CRYPT_RSA_EncryptSizeGet function 5-1154
CRYPT_RSA_Free function 5-1154
CRYPT_RSA_Initialize function 5-1154
CRYPT_RSA_PrivateDecrypt function 5-1155
CRYPT_RSA_PrivateKeyDecode function 5-1155
CRYPT_RSA_PublicEncrypt function 5-1156
CRYPT_RSA_PublicKeyDecode function 5-1156
CRYPT_SHA_CTX structure 5-1163
CRYPT_SHA_DataAdd function 5-1141
CRYPT_SHA_Finalize function 5-1142
CRYPT_SHA_Initialize function 5-1142
CRYPT_SHA256_CTX structure 5-1163
CRYPT_SHA256_DataAdd function 5-1139
CRYPT_SHA256_Finalize function 5-1139
CRYPT_SHA256_Initialize function 5-1140
CRYPT_SHA384_CTX structure 5-1163
CRYPT_SHA384_DataAdd function 5-1137
CRYPT_SHA384_Finalize function 5-1137
CRYPT_SHA384_Initialize function 5-1138
CRYPT_SHA512_CTX structure 5-1164
CRYPT_SHA512_DataAdd function 5-1133
CRYPT_SHA512_Finalize function 5-1134
CRYPT_SHA512_Initialize function 5-1134
CRYPT_TDES_CBC_Decrypt function 5-1151
CRYPT_TDES_CBC_Encrypt function 5-1152
CRYPT_TDES_CTX structure 5-1164
CRYPT_TDES_IvSet function 5-1152
CRYPT_TDES_KeySet function 5-1153
Crypto Library 4-181
crypto.h 5-1165
Cryptographic (Crypto) Library 5-1127
Customizing the Application 3-110, 3-126, 3-147
CYAN macro 5-946
D
DARKGRAY macro 5-946
DARKORANGE macro 5-947
Data Transfer 5-516
Data Types 5-188
Data Types and Constants 5-305, 5-317, 5-340, 5-4174,
5-4209, 7-4241
DATASERIES structure 5-889
ddns.h 5-3653
DDNS_CHECKIP_SERVER macro 5-3648
ddns_config.h 5-3654
DDNS_DEFAULT_PORT macro 5-3648
DDNS_MODULE_CONFIG structure 5-3650
DDNS_POINTERS structure 5-3651
DDNS_SERVICES enumeration 5-3652
DDNS_STATUS enumeration 5-3652
9 MPLAB Harmony Help
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Defining Colors 5-1118
DELAY_FIRST_PROBE_TIME macro 5-3802
Delays 5-3512
Demonstration 5-3957
Demonstration Application Configurations 3-151
Demonstration Board Information 3-77, 3-91, 3-118, 3-136,
3-170
Demonstrations 3-65, 3-85, 3-114, 3-131, 3-152
Descriptor Table Example 5-1917
Descriptors 5-4010
Developing Vendor-specific Function Drivers 5-4017
Development Information (Advance Information) 5-3565
Device 3-152
Device Control System Service Library 5-3363
Device Events 5-4015
DHCP Server TCP/IP Stack Library 5-3625
DHCP TCP/IP Stack Library 5-3614
dhcp.h 5-3624
DHCP_CLIENT_ENABLED macro 5-3617
DHCP_CLIENT_PORT macro 5-3617
dhcp_config.h 5-3624
DHCP_MODULE_CONFIG structure 5-3622
DHCP_SERVER_GATEWAY_ADDRESS macro 5-3628
DHCP_SERVER_IP_ADDRESS macro 5-3628
DHCP_SERVER_NETMASK_ADDRESS macro 5-3628
DHCP_SERVER_POOL_ENTRY_TYPE enumeration 5-3633
DHCP_SERVER_PORT macro 5-3617
DHCP_SERVER_PRIMARY_DNS_ADDRESS macro 5-3628
DHCP_SERVER_SECONDARY_DNS_ADDRESS macro
5-3628
DHCP_TASK_TICK_RATE macro 5-3617
DHCP_TIMEOUT macro 5-3617
dhcps.h 5-3635
dhcps_config.h 5-3635
DHCPS_IP_ADDRESS_RANGE_START macro 5-3629
DHCPS_LEASE_DURATION macro 5-3629
DHCPS_LEASE_ENTRIES_DEFAULT macro 5-3629
DHCPS_LEASE_ENTRY structure 5-3633
DHCPS_LEASE_HANDLE type 5-3634
DHCPS_LEASE_REMOVED_BEFORE_ACK macro 5-3629
DHCPS_LEASE_SOLVED_ENTRY_TMO macro 5-3629
DHCPS_MODULE_CONFIG structure 5-3634
DHCPS_TASK_PROCESS_RATE macro 5-3629
DisablePalette function 5-827
DisplayUpdatePending variable 5-887
DMA Mode 5-2898
DMA Peripheral Library Help 5-1733
DMA_ADDRESS_OFFSET_TYPE enumeration 5-1821
DMA_CHANNEL enumeration 5-1821
DMA_CHANNEL_ADDRESSING_MODE enumeration 5-1822
DMA_CHANNEL_COLLISION enumeration 5-1822
DMA_CHANNEL_DATA_SIZE enumeration 5-1823
DMA_CHANNEL_PRIORITY enumeration 5-1823
DMA_CHANNEL_TRANSFER_DIRECTION enumeration
5-1824
DMA_CHANNEL_TRIGGER_TYPE enumeration 5-1824
DMA_CRC_BIT_ORDER enumeration 5-1824
DMA_CRC_BYTE_ORDER enumeration 5-1825
DMA_CRC_TYPE enumeration 5-1825
DMA_DESTINATION_ADDRESSING_MODE enumeration
5-1826
DMA_INT_TYPE enumeration 5-1826
DMA_ISR_TASK enumeration 5-307
DMA_MODULE_ID enumeration 5-1827
DMA_PATTERN_LENGTH enumeration 5-1827
DMA_PING_PONG_MODE enumeration 5-1828
DMA_SOURCE_ADDRESSING_MODE enumeration 5-1828
DMA_TRANSFER_MODE enumeration 5-1829
DMA_TRIGGER_SOURCE enumeration 5-1829
DNS TCP/IP Stack Library 5-3636
dns.h 5-3645
DNS_CLIENT_ARP_TMO macro 5-3639
DNS_CLIENT_MODULE_CONFIG structure 5-3643
DNS_CLIENT_OPEN_TMO macro 5-3639
DNS_CLIENT_PORT macro 5-3639
DNS_CLIENT_SERVER_TMO macro 5-3639
DNS_CLIENT_TASK_PROCESS_RATE macro 5-3640
DNS_CLIENT_VERSION_NO macro 5-3640
dns_config.h 5-3645
DNS_RESOLVE_TYPE enumeration 5-3643
9 MPLAB Harmony Help
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DNS_RESULT enumeration 5-3644
DNS_SERVER_MODULE_CONFIG structure 5-3644
Double Buffering 5-1121
doubleBuffEnabled variable 5-888
DrawArc function 5-827
Driver Initialization 5-554
Driver Library Help 5-185
Driver Library Overview 5-185
driver.h 5-192
driver_common.h 5-193
DRIVER_COUNT macro 5-325
DriverInterfaceInit function 5-291
drv_adc.c 5-202
drv_adc.h 5-225
DRV_ADC_ACQUISITION_TIME macro 5-219
DRV_ADC_ALTERNATE_INPUT_SAMPLING_ENABLE macro
5-219
DRV_ADC_ANALOG_INPUT macro 5-220
DRV_ADC_AUTO_SAMPLING_ENABLE macro 5-220
drv_adc_client_multi.c 5-203
drv_adc_client_single.c 5-203
DRV_ADC_CLIENT_STATUS enumeration 5-217
DRV_ADC_CLIENTS_NUMBER macro 5-220
DRV_ADC_ClientStatus function 5-210
DRV_ADC_Close function 5-210
DRV_ADC_CONVERSION_CLOCK_PRESCALER macro 5-220
DRV_ADC_CONVERSION_CLOCK_SOURCE macro 5-221
DRV_ADC_CONVERSION_TRIGGER_SOURCE macro 5-221
DRV_ADC_Deinitialize function 5-205
drv_adc_hw_dynamic.c 5-203
drv_adc_hw_static.c 5-203
DRV_ADC_INDEX macro 5-221
DRV_ADC_INDEX_0 macro 5-222
DRV_ADC_INDEX_1 macro 5-222
DRV_ADC_INDEX_2 macro 5-222
DRV_ADC_INDEX_COUNT macro 5-222
DRV_ADC_INIT structure 5-218
DRV_ADC_INIT_FLAGS enumeration 5-219
DRV_ADC_Initialize function 5-206
DRV_ADC_InputsRegister function 5-211
DRV_ADC_INSTANCES_NUMBER macro 5-222
DRV_ADC_INTERNAL_BUFFER_SIZE macro 5-223
DRV_ADC_INTERRUPT_MODE macro 5-223
DRV_ADC_INTERRUPT_SOURCE macro 5-223
DRV_ADC_Open function 5-211
DRV_ADC_PERIPHERAL_ID macro 5-223
DRV_ADC_POWER_STATE macro 5-224
DRV_ADC_Reinitialize function 5-207
DRV_ADC_RESULT_FORMAT macro 5-224
DRV_ADC_SampleMaxGet function 5-214
DRV_ADC_SampleMinGet function 5-215
DRV_ADC_SAMPLES_PER_INTERRUPT macro 5-224
DRV_ADC_SamplesAvailable function 5-212
DRV_ADC_SamplesRead function 5-215
DRV_ADC_SamplesReadLatest function 5-216
DRV_ADC_Start function 5-213
DRV_ADC_Status function 5-208
DRV_ADC_Stop function 5-214
DRV_ADC_STOP_ON_CONVERSION_ENABLE macro 5-224
DRV_ADC_Tasks function 5-209
DRV_ADC_VOLTAGE_REFERENCE macro 5-225
DRV_CLIENT_STATUS enumeration 5-188
DRV_CONFIG_NOT_SUPPORTED macro 5-191
drv_ethernet_flags.h 5-252, 5-288
drv_ethmac.h 5-252
DRV_ETHMAC_CLIENTS_NUMBER macro 5-235
drv_ethmac_config.h 5-253
DRV_ETHMAC_INDEX macro 5-235
DRV_ETHMAC_INDEX_0 macro 8-4247
DRV_ETHMAC_INDEX_1 macro 5-251
DRV_ETHMAC_INDEX_COUNT macro 8-4247
DRV_ETHMAC_INSTANCES_NUMBER macro 5-235
DRV_ETHMAC_INTERRUPT_MODE macro 5-235
DRV_ETHMAC_INTERRUPT_SOURCE macro 5-236
DRV_ETHMAC_PERIPHERAL_ID macro 5-236
DRV_ETHMAC_PIC32MACClose function 5-238
DRV_ETHMAC_PIC32MACEventAcknowledge function 5-243
DRV_ETHMAC_PIC32MACEventMaskSet function 5-244
DRV_ETHMAC_PIC32MACEventPendingGet function 5-245
9 MPLAB Harmony Help
h
DRV_ETHMAC_PIC32MACGetConfig function 5-238
DRV_ETHMAC_PIC32MACLinkCheck function 5-239
DRV_ETHMAC_PIC32MACOpen function 5-239
DRV_ETHMAC_PIC32MACPacketRx function 5-241
DRV_ETHMAC_PIC32MACPacketTx function 5-242
DRV_ETHMAC_PIC32MACPowerMode function 5-246
DRV_ETHMAC_PIC32MACProcess function 5-246
DRV_ETHMAC_PIC32MACRxFilterHashTableEntrySet function
5-242
DRV_ETHMAC_PIC32MACSetup function 5-240
DRV_ETHMAC_PIC32MACTeardown function 5-240
DRV_ETHMAC_POWER_STATE macro 5-236
drv_ethphy.h 5-286
DRV_ETHPHY_CLIENT_STATUS enumeration 5-284
DRV_ETHPHY_CLIENTS_NUMBER macro 5-260
DRV_ETHPHY_ClientStatus function 5-268
DRV_ETHPHY_Close function 5-268
drv_ethphy_config.h 5-288
DRV_ETHPHY_Deinitialize function 5-264
DRV_ETHPHY_HWConfigFlagsGet function 5-269
DRV_ETHPHY_INDEX macro 5-260
DRV_ETHPHY_INDEX_0 macro 5-260
DRV_ETHPHY_INDEX_1 macro 5-251
DRV_ETHPHY_INDEX_COUNT macro 5-261
DRV_ETHPHY_INIT structure 5-285
DRV_ETHPHY_Initialize function 5-264
DRV_ETHPHY_INSTANCES_NUMBER macro 5-261
DRV_ETHPHY_LinkScanRead function 5-270
DRV_ETHPHY_LinkScanStart function 5-270
DRV_ETHPHY_LinkScanStop function 5-271
DRV_ETHPHY_LinkStatusGet function 5-271
DRV_ETHPHY_NegotiationIsComplete function 5-272
DRV_ETHPHY_NegotiationResultGet function 5-273
DRV_ETHPHY_Open function 5-273
DRV_ETHPHY_PERIPHERAL_ID macro 5-261
DRV_ETHPHY_Reinitialize function 5-265
DRV_ETHPHY_Reset function 5-274
DRV_ETHPHY_RestartNegotiation function 5-275
DRV_ETHPHY_Setup function 5-275
DRV_ETHPHY_SMIClockSet function 5-276
DRV_ETHPHY_SMIisBusy function 5-277
DRV_ETHPHY_SMIReadResultGet function 5-277
DRV_ETHPHY_SMIReadStart function 5-278
DRV_ETHPHY_SMIScanDataGet function 5-278
DRV_ETHPHY_SMIScanStart function 5-279
DRV_ETHPHY_SMIScanStatusGet function 5-279
DRV_ETHPHY_SMIScanStop function 5-280
DRV_ETHPHY_SMIWriteStart function 5-280
DRV_ETHPHY_Status function 5-266
DRV_ETHPHY_Tasks function 5-267
DRV_ETHPHY_VersionGet function 5-283
DRV_ETHPHY_VersionStrGet function 5-284
drv_gfx_config_template.h 5-299
drv_gfx_display.h 5-295
drv_gfx_lcc.h 5-296
drv_gfx_lcc_config_template.h 5-308
drv_gfx_otm2201a.h 5-318
drv_gfx_s1d13517.h 5-297
drv_gfx_s1d13517_config_template.h 5-332
drv_gfx_ssd1926.h 5-298
drv_gfx_ssd1926_config_template.h 5-341
DRV_HANDLE type 5-189
DRV_HANDLE_INVALID macro 5-191
DRV_IO_BUFFER_TYPES enumeration 5-189
DRV_IO_INTENT enumeration 5-189
DRV_IO_ISBLOCKING macro 5-191
DRV_IO_ISEXCLUSIVE macro 5-191
DRV_IO_ISNONBLOCKING macro 5-192
drv_nvm.h 5-365
DRV_NVM_BUFFER_HANDLE type 5-363
DRV_NVM_BUFFER_HANDLE_INVALID macro 5-362
DRV_NVM_BUFFER_OBJECT_NUMBER macro 5-349
DRV_NVM_BUFFER_STATUS enumeration 5-363
DRV_NVM_BufferStatus function 5-361
DRV_NVM_CLIENT_STATUS enumeration 5-364
DRV_NVM_CLIENTS_NUMBER macro 5-350
DRV_NVM_ClientStatus function 5-355
DRV_NVM_Close function 5-356
drv_nvm_config_template.h 5-366
9 MPLAB Harmony Help
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DRV_NVM_Deinitialize function 5-353
DRV_NVM_Erase function 5-357
DRV_NVM_ERASE_SIZE macro 5-350
DRV_NVM_INDEX_0 macro 5-362
DRV_NVM_INDEX_1 macro 5-365
DRV_NVM_INDEX_COUNT macro 5-363
DRV_NVM_INIT structure 5-364
DRV_NVM_Initialize function 5-353
DRV_NVM_INSTANCES_NUMBER macro 5-350
DRV_NVM_INTERRUPT_MODE macro 5-350
DRV_NVM_Open function 5-357
DRV_NVM_Read function 5-359
DRV_NVM_ROW_SIZE macro 5-351
DRV_NVM_Status function 5-354
DRV_NVM_Tasks function 5-360
DRV_NVM_UNLOCK_KEY1 macro 5-351
DRV_NVM_UNLOCK_KEY2 macro 5-351
DRV_NVM_Write function 5-360
drv_pmp.h 5-395
DRV_PMP_CHIPX_STROBE_MODE enumeration 5-388
DRV_PMP_CLIENT_STATUS enumeration 5-388
DRV_PMP_CLIENTS_NUMBER macro 5-376
DRV_PMP_ClientStatus function 5-383
DRV_PMP_Close function 5-383
drv_pmp_config.h 5-396
DRV_PMP_Deinitialize function 5-378
DRV_PMP_ENDIAN_MODE enumeration 5-389
DRV_PMP_INDEX enumeration 5-389
DRV_PMP_INDEX_COUNT macro 5-388
DRV_PMP_INIT structure 5-389
DRV_PMP_Initialize function 5-379
DRV_PMP_INSTANCES_NUMBER macro 5-376
DRV_PMP_MODE_CONFIG structure 5-390
DRV_PMP_ModeConfig function 5-384
DRV_PMP_Open function 5-385
DRV_PMP_POLARITY_OBJECT structure 5-390
DRV_PMP_PORT_CONTROL enumeration 5-391
DRV_PMP_PORTS structure 5-391
DRV_PMP_QUEUE_ELEMENT_OBJ type 5-392
DRV_PMP_QUEUE_SIZE macro 5-376
DRV_PMP_Read function 5-386
DRV_PMP_Reinitialize function 5-380
DRV_PMP_Status function 5-381
DRV_PMP_Tasks function 5-382
DRV_PMP_TRANSFER_STATUS enumeration 5-392
DRV_PMP_TRANSFER_TYPE enumeration 5-393
DRV_PMP_TransferStatus function 5-387
DRV_PMP_VersionGet function 5-394
DRV_PMP_VersionStrGet function 5-394
DRV_PMP_WAIT_STATES structure 5-392
DRV_PMP_Write function 5-386
drv_sdcard.h 5-416
DRV_SDCARD_BUFFER_HANDLE type 5-414
DRV_SDCARD_BufferStatusGet function 5-409
DRV_SDCARD_CLIENT_STATUS enumeration 5-414
DRV_SDCARD_ClientStatus function 5-405
DRV_SDCARD_Close function 5-406
DRV_SDCARD_Deinitialize function 5-401
DRV_SDCARD_INDEX_0 macro 5-413
DRV_SDCARD_INDEX_1 macro 5-416
DRV_SDCARD_INDEX_2 macro 5-416
DRV_SDCARD_INDEX_3 macro 5-416
DRV_SDCARD_INDEX_COUNT macro 5-414
DRV_SDCARD_INIT type 5-415
DRV_SDCARD_Initialize function 5-402
DRV_SDCARD_MediaStatusGet function 5-410
DRV_SDCARD_Open function 5-407
DRV_SDCARD_Reinitialize function 5-403
DRV_SDCARD_SectorRead function 5-407
DRV_SDCARD_SectorsCountGet function 5-410
DRV_SDCARD_SectorSizeGet function 5-411
DRV_SDCARD_SectorWrite function 5-408
DRV_SDCARD_Status function 5-404
DRV_SDCARD_Tasks function 5-405
DRV_SDCARD_VersionGet function 5-412
DRV_SDCARD_VersionStrGet function 5-413
DRV_SDCARD_WriteProtectionIsEnabled function 5-412
drv_spi.h 5-455
9 MPLAB Harmony Help
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DRV_SPI_BAUD_RATE macro 5-443
DRV_SPI_BAUD_RATE_CLOCK macro 5-444
DRV_SPI_BUFFER_EVENT enumeration 5-450
DRV_SPI_BUFFER_EVENT_HANDLER type 5-451
DRV_SPI_BUFFER_HANDLE type 5-452
DRV_SPI_BUFFER_HANDLE_INVALID macro 5-444
DRV_SPI_BUFFER_SIZE macro 5-444
DRV_SPI_BUFFER_TYPE enumeration 5-452
DRV_SPI_BUFFER_USAGE_TYPE macro 5-444
DRV_SPI_BufferAddRead function 5-438
DRV_SPI_BufferAddWrite function 5-439
DRV_SPI_BufferAddWriteRead function 5-440
DRV_SPI_BufferStatus function 5-435
DRV_SPI_CLIENT_SETUP type 5-453
DRV_SPI_CLIENTS_NUMBER macro 5-445
DRV_SPI_ClientSetup function 5-436
DRV_SPI_CLOCK_MODE enumeration 5-453
DRV_SPI_CLOCK_OPERATION_MODE macro 5-445
DRV_SPI_Close function 5-437
DRV_SPI_COMMUNICATION_WIDTH macro 5-445
drv_spi_config_template.h 5-456
DRV_SPI_Deinitialize function 5-430
DRV_SPI_FRAME_SYNC_PULSE_COUNT macro 5-445
DRV_SPI_FRAME_SYNC_PULSE_DIRECTION macro 5-446
DRV_SPI_FRAME_SYNC_PULSE_EDGE macro 5-446
DRV_SPI_FRAME_SYNC_PULSE_POLARITY macro 5-446
DRV_SPI_FRAME_SYNC_PULSE_WIDTH macro 5-446
DRV_SPI_INDEX macro 5-447
DRV_SPI_INDEX_0 macro 5-447
DRV_SPI_INDEX_1 macro 5-442
DRV_SPI_INDEX_2 macro 5-442
DRV_SPI_INDEX_3 macro 5-443
DRV_SPI_INDEX_4 macro 5-443
DRV_SPI_INDEX_5 macro 5-443
DRV_SPI_INDEX_COUNT macro 5-447
DRV_SPI_INIT type 5-453
DRV_SPI_Initialize function 5-431
DRV_SPI_INPUT_SAMPLE_PHASE macro 5-447
DRV_SPI_INSTANCES_NUMBER macro 5-448
DRV_SPI_INTERRUPT_MODE macro 5-448
DRV_SPI_INTERRUPT_SOURCE_ERROR macro 5-448
DRV_SPI_INTERRUPT_SOURCE_RX macro 5-448
DRV_SPI_INTERRUPT_SOURCE_TX macro 5-449
DRV_SPI_MODE enumeration 5-454
DRV_SPI_Open function 5-437
DRV_SPI_PERIPHERAL_ID macro 5-449
DRV_SPI_PORTS_REMAP_USAGE macro 5-449
DRV_SPI_POWER_STATE macro 5-450
DRV_SPI_PROTOCOL macro 5-450
DRV_SPI_PROTOCOL_TYPE enumeration 5-454
DRV_SPI_Read function 5-434
DRV_SPI_RX_FIFO_INTERRUPT_MODE macro 5-443
DRV_SPI_Status function 5-432
DRV_SPI_Tasks function 5-433
DRV_SPI_TX_FIFO_INTERRUPT_MODE macro 5-443
DRV_SPI_USAGE_MODE macro 5-450
DRV_SPI_VersionGet function 5-441
DRV_SPI_VersionStrGet function 5-442
DRV_SPI_Write function 5-434
drv_tmr.h 5-508
DRV_TMR_ALARM_CONFIG structure 5-504
DRV_TMR_ALARM_ENABLE macro 5-479
DRV_TMR_ALARM_PERIODIC macro 5-480
DRV_TMR_ALARM_TYPE enumeration 5-504
DRV_TMR_AlarmCountClear function 5-493
DRV_TMR_AlarmCountGet function 5-494
DRV_TMR_AlarmSet function 5-494
DRV_TMR_ASYNC_WRITE_ENABLE macro 5-481
DRV_TMR_CALLBACK type 5-505
DRV_TMR_CLIENT_STATUS enumeration 5-505
DRV_TMR_CLIENTS_NUMBER macro 5-480
DRV_TMR_ClientStatus function 5-488
DRV_TMR_CLOCK_SOURCE macro 5-474
DRV_TMR_Close function 5-489
drv_tmr_config_alarm.h 5-481
drv_tmr_config_template.h 5-509
DRV_TMR_COUNT_WIDTH macro 5-477
DRV_TMR_Counter16BitGet function 5-498
9 MPLAB Harmony Help
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DRV_TMR_Counter16BitSet function 5-499
DRV_TMR_Counter32BitGet function 5-499
DRV_TMR_Counter32BitSet function 5-500
DRV_TMR_Counter8BitGet function 5-500
DRV_TMR_Counter8BitSet function 5-501
DRV_TMR_Deinitialize function 5-483
DRV_TMR_ElapsedStatusGetAndClear function 5-489
DRV_TMR_INDEX macro 5-477
DRV_TMR_INDEX_0 macro 5-477
DRV_TMR_INDEX_1 macro 5-477
DRV_TMR_INDEX_2 macro 5-478
DRV_TMR_INDEX_3 macro 5-478
DRV_TMR_INDEX_4 macro 5-478
DRV_TMR_INDEX_5 macro 5-478
DRV_TMR_INDEX_COUNT macro 5-478
DRV_TMR_INIT structure 5-506
DRV_TMR_Initialize function 5-484
DRV_TMR_INSTANCES_NUMBER macro 5-478
DRV_TMR_INTERRUPT_MODE macro 5-479
DRV_TMR_INTERRUPT_SOURCE macro 5-507
DRV_TMR_Open function 5-490
DRV_TMR_OperatingFrequencyGet function 5-502
DRV_TMR_Period16BitGet function 5-495
DRV_TMR_Period16BitSet function 5-495
DRV_TMR_Period32BitGet function 5-496
DRV_TMR_Period32BitSet function 5-497
DRV_TMR_Period8BitGet function 5-497
DRV_TMR_Period8BitSet function 5-498
DRV_TMR_PERIPHERAL_ID macro 5-475
DRV_TMR_POSTSCALE macro 5-475
DRV_TMR_POWER_STATE macro 5-507
DRV_TMR_PRESCALE macro 5-475
DRV_TMR_PRESCALER_ENABLE macro 5-481
DRV_TMR_Reinitialize function 5-485
DRV_TMR_SOURCE_EDGE macro 5-475
DRV_TMR_Start function 5-491
DRV_TMR_Status function 5-486
DRV_TMR_Stop function 5-491
DRV_TMR_SYNC_MODE enumeration 5-506
DRV_TMR_SYNCHRONIZATION_MODE macro 5-476
DRV_TMR_SyncModeGet function 5-492
DRV_TMR_SyncModeSet function 5-492
DRV_TMR_Tasks function 5-487
DRV_TMR_TickFrequencyGet function 5-502
DRV_TMR_TIMER_PERIOD macro 5-476
DRV_TMR_UNIFIED macro 5-507
DRV_TMR_VersionGet function 5-503
DRV_TMR_VersionStrGet function 5-503
drv_usart.h 5-549
DRV_USART_AUTO_BAUD_ENABLE macro 5-536
DRV_USART_BAUD_RATE macro 5-537
DRV_USART_BUFFER_FLAGS enumeration 5-543
DRV_USART_BUFFER_STATUS enumeration 5-543
DRV_USART_BufferAdd function 5-526
DRV_USART_BufferStatus function 5-527
DRV_USART_BufferTransferStatus function 5-532
DRV_USART_BYTE_Q_SIZE_RX macro 5-537
DRV_USART_BYTE_Q_SIZE_TX macro 5-537
DRV_USART_CALLBACK type 5-544
DRV_USART_CLIENT_STATUS enumeration 5-544
DRV_USART_CLIENTS_NUMBER macro 5-537
DRV_USART_ClientStatus function 5-533
DRV_USART_Close function 5-534
drv_usart_config_template.h 5-551
DRV_USART_Deinitialize function 5-521
DRV_USART_HANDSHAKE_MODE macro 5-537
DRV_USART_HANDSHAKE_MODES enumeration 5-545
DRV_USART_INDEX macro 5-538
DRV_USART_INDEX_0 macro 5-538
DRV_USART_INDEX_1 macro 5-538
DRV_USART_INDEX_2 macro 5-538
DRV_USART_INDEX_3 macro 5-538
DRV_USART_INDEX_4 macro 5-539
DRV_USART_INDEX_5 macro 5-539
DRV_USART_INDEX_COUNT macro 5-539
DRV_USART_INIT structure 5-545
DRV_USART_INIT_FLAGS enumeration 5-546
DRV_USART_Initialize function 5-522
9 MPLAB Harmony Help
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DRV_USART_INSTANCES_NUMBER macro 5-539
DRV_USART_INTERRUPT_MODE macro 5-539
DRV_USART_INTERRUPT_SOURCE_ERROR macro 5-540
DRV_USART_INTERRUPT_SOURCE_RX macro 5-540
DRV_USART_INTERRUPT_SOURCE_TX macro 5-540
DRV_USART_IO_BUFFER structure 5-546
DRV_USART_LINE_CONTROL macro 5-540
DRV_USART_LINE_CONTROL_MODES enumeration 5-547
DRV_USART_Open function 5-534
DRV_USART_OPERATION_MODE macro 5-541
DRV_USART_OPERATION_MODE_INIT union 5-547
DRV_USART_OPERATION_MODES enumeration 5-548
DRV_USART_PERIPHERAL_ID macro 5-541
DRV_USART_POLARITY_INVERTED_RX macro 5-541
DRV_USART_POLARITY_INVERTED_TX macro 5-542
DRV_USART_POWER_STATE macro 5-542
DRV_USART_Read function 5-528
DRV_USART_ReadByte function 5-529
DRV_USART_Reinitialize function 5-523
DRV_USART_Status function 5-535
DRV_USART_TasksError function 5-524
DRV_USART_TasksRX function 5-525
DRV_USART_TasksTX function 5-525
DRV_USART_TRANSFER_STATUS enumeration 5-548
DRV_USART_TransferStatus function 5-530
DRV_USART_WAKE_ON_START_ENABLE macro 5-542
DRV_USART_Write function 5-530
DRV_USART_WriteByte function 5-531
DRV_USART_XFER_BUFFER_NUMBER macro 5-542
DRV_USART_XFER_HANDLE type 5-549
drv_usb.h 5-598
DRV_USB_ClientEventCallBackSet function 5-581
DRV_USB_Close function 5-579
drv_usb_config_template.h 5-600
DRV_USB_DEVICE_AddressSet function 5-582
DRV_USB_DEVICE_Attach function 5-582
DRV_USB_DEVICE_CurrentSpeedGet function 5-583
DRV_USB_DEVICE_Detach function 5-584
DRV_USB_DEVICE_EndpointDisable function 5-585
DRV_USB_DEVICE_EndpointDisableAll function 5-585
DRV_USB_DEVICE_EndpointEnable function 5-586
DRV_USB_DEVICE_EndpointIsEnabled function 5-587
DRV_USB_DEVICE_EndpointIsStalled function 5-588
DRV_USB_DEVICE_EndpointStall function 5-589
DRV_USB_DEVICE_EndpointStallClear function 5-589
DRV_USB_DEVICE_IRPCancelAll function 5-590
DRV_USB_DEVICE_IRPSubmit function 5-591
DRV_USB_ENDPOINT_TABLE_ENTRY_SIZE macro 5-595
DRV_USB_EVENT enumeration 5-596
DRV_USB_EVENT_CALLBACK type 5-597
DRV_USB_HOST_BusResetControl function 5-593
DRV_USB_HOST_DeviceCurrentSpeedGet function 5-593
DRV_USB_HOST_IRPCancel function 5-593
DRV_USB_HOST_IRPSubmit function 5-593
DRV_USB_HOST_OperationEnable function 5-593
DRV_USB_HOST_OperationIsEnabled function 5-578
DRV_USB_HOST_PIPE_HANDLE type 5-597
DRV_USB_HOST_PIPE_HANDLE_INVALID macro 5-595
DRV_USB_HOST_PipeClose function 5-581
DRV_USB_HOST_PipeSetup function 5-580
DRV_USB_HOST_StartOfFrameControl function 5-594
DRV_USB_HOST_TimerIsComplete function 5-594
DRV_USB_HOST_TimerReset function 5-594
DRV_USB_HOST_TimerStart function 5-594
DRV_USB_INDEX macro 5-595
DRV_USB_INDEX_0 macro 5-596
DRV_USB_INIT structure 5-597
DRV_USB_Initialize function 5-576
DRV_USB_INTERRUPT_SOURCE macro 5-596
DRV_USB_Open function 5-579
DRV_USB_PERIPHERAL_ID macro 5-596
DRV_USB_Status function 5-577
DRV_USB_Tasks function 5-594
DRV_USB_Tasks_ISR function 5-578
drv_wifi.h 5-674
DRV_WIFI_ADHOC_CONNECT_ONLY enumeration member
5-655
DRV_WIFI_ADHOC_CONNECT_THEN_START enumeration
member 5-655
9 MPLAB Harmony Help
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DRV_WIFI_ADHOC_MODES enumeration 5-655
DRV_WIFI_ADHOC_NETWORK_CONTEXT structure 5-655
DRV_WIFI_ADHOC_START_ONLY enumeration member
5-655
DRV_WIFI_AdhocContextSet function 5-636
DRV_WIFI_BSSID_LENGTH macro 5-647
DRV_WIFI_BssidGet function 5-613
DRV_WIFI_BssidSet function 5-614
DRV_WIFI_ChannelListGet function 5-615
DRV_WIFI_ChannelListSet function 5-615
DRV_WIFI_ConfigDataErase function 5-643
DRV_WIFI_ConfigDataLoad function 5-643
DRV_WIFI_ConfigDataPrint function 5-644
DRV_WIFI_ConfigDataSave function 5-644
DRV_WIFI_Connect function 5-641
DRV_WIFI_ConnectContextGet function 5-616
DRV_WIFI_CONNECTION_CONTEXT structure 5-656
DRV_WIFI_CONNECTION_STATES enumeration 5-656
DRV_WIFI_ConnectionStateGet function 5-616
DRV_WIFI_DEAUTH_REASONCODE_MASK macro 5-647
DRV_WIFI_DEFAULT_ADHOC_BEACON_PERIOD macro
5-647
DRV_WIFI_DEFAULT_ADHOC_HIDDEN_SSID macro 5-648
DRV_WIFI_DEFAULT_ADHOC_MODE macro 5-648
DRV_WIFI_DEFAULT_PS_DTIM_ENABLED macro 5-648
DRV_WIFI_DEFAULT_PS_DTIM_INTERVAL macro 5-648
DRV_WIFI_DEFAULT_PS_LISTEN_INTERVAL macro 5-648
DRV_WIFI_DEFAULT_SCAN_COUNT macro 5-648
DRV_WIFI_DEFAULT_SCAN_MAX_CHANNEL_TIME macro
5-649
DRV_WIFI_DEFAULT_SCAN_MIN_CHANNEL_TIME macro
5-649
DRV_WIFI_DEFAULT_SCAN_PROBE_DELAY macro 5-649
DRV_WIFI_DEFAULT_WEP_KEY_TYPE macro 5-649
DRV_WIFI_Deinitialize function 5-641
DRV_WIFI_DEVICE_INFO structure 5-657
DRV_WIFI_DEVICE_TYPES enumeration 5-657
DRV_WIFI_DeviceInfoGet function 5-617
DRV_WIFI_DISABLED macro 5-649
DRV_WIFI_DISASSOC_REASONCODE_MASK macro 5-649
DRV_WIFI_Disconnect function 5-641
DRV_WIFI_DOMAIN_CODES enumeration 5-657
DRV_WIFI_ENABLED macro 5-650
DRV_WIFI_EVENT_CONN_TEMP_LOST_CODES
enumeration 5-658
DRV_WIFI_EVENT_INFO enumeration 5-658
DRV_WIFI_EVENTS enumeration 5-659
DRV_WIFI_GENERAL_ERRORS enumeration 5-660
DRV_WIFI_GratuitousArpStart function 5-638
DRV_WIFI_GratuitousArpStop function 5-638
DRV_WIFI_HIBERNATE_STATE structure 5-660
DRV_WIFI_HIBERNATE_STATES enumeration 5-660
DRV_WIFI_HibernateEnable function 5-639
DRV_WIFI_HWMulticastFilterGet function 5-617
DRV_WIFI_HWMulticastFilterSet function 5-618
DRV_WIFI_Initialize function 5-642
DRV_WIFI_isHibernateEnable function 5-639
DRV_WIFI_MAC_STATS structure 5-660
DRV_WIFI_MacAddressGet function 5-619
DRV_WIFI_MacAddressSet function 5-619
DRV_WIFI_MacStatsGet function 5-620
DRV_WIFI_MAX_CHANNEL_LIST_LENGTH macro 5-650
DRV_WIFI_MAX_NUM_RATES macro 5-650
DRV_WIFI_MAX_SECURITY_KEY_LENGTH macro 5-650
DRV_WIFI_MAX_SSID_LENGTH macro 5-650
DRV_WIFI_MAX_WEP_KEY_LENGTH macro 5-650
DRV_WIFI_MAX_WPA_PASS_PHRASE_LENGTH macro
5-650
DRV_WIFI_MAX_WPA2_PASS_PHRASE_LENGTH macro
5-651
DRV_WIFI_MGMT_ERRORS enumeration 5-661
DRV_WIFI_MGMT_INDICATE_SOFT_AP_EVENT structure
5-662
DRV_WIFI_MIN_WPA_PASS_PHRASE_LENGTH macro 5-651
DRV_WIFI_MULTICAST_FILTER_IDS enumeration 5-663
DRV_WIFI_MULTICAST_FILTERS enumeration 5-663
DRV_WIFI_NETWORK_TYPE_ADHOC macro 5-651
DRV_WIFI_NETWORK_TYPE_INFRASTRUCTURE macro
5-651
DRV_WIFI_NETWORK_TYPE_P2P macro 5-651
DRV_WIFI_NETWORK_TYPE_SOFT_AP macro 5-651
DRV_WIFI_NetworkTypeGet function 5-620
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DRV_WIFI_NetworkTypeSet function 5-621
DRV_WIFI_NO_ADDITIONAL_INFO macro 5-652
DRV_WIFI_POWER_SAVE_STATES enumeration 5-664
DRV_WIFI_PowerSaveStateGet function 5-621
DRV_WIFI_ProcessEvent function 5-644
DRV_WIFI_PS_POLL_CONTEXT structure 5-664
DRV_WIFI_PsPollDisable function 5-640
DRV_WIFI_PsPollEnable function 5-640
DRV_WIFI_REASON_CODES enumeration 5-665
DRV_WIFI_RECONNECT_MODES enumeration 5-665
DRV_WIFI_ReconnectModeGet function 5-622
DRV_WIFI_ReconnectModeSet function 5-623
DRV_WIFI_RegionalDomainGet function 5-624
DRV_WIFI_RETRY_ADHOC macro 5-652
DRV_WIFI_RETRY_FOREVER macro 5-652
DRV_WIFI_RssiGet function 5-637
DRV_WIFI_RssiSet function 5-637
DRV_WIFI_RTS_THRESHOLD_MAX macro 5-652
DRV_WIFI_RtsThresholdGet function 5-625
DRV_WIFI_RtsThresholdSet function 5-625
DRV_WIFI_Scan function 5-642
DRV_WIFI_SCAN_CONTEXT structure 5-665
DRV_WIFI_SCAN_RESULT structure 5-666
DRV_WIFI_SCAN_TYPES enumeration 5-667
DRV_WIFI_ScanContextGet function 5-626
DRV_WIFI_ScanContextSet function 5-627
DRV_WIFI_ScanGetResult function 5-645
DRV_WIFI_SECURITY_CONTEXT union 5-667
DRV_WIFI_SECURITY_EAP macro 5-652
DRV_WIFI_SECURITY_OPEN macro 5-652
DRV_WIFI_SECURITY_WEP_104 macro 5-653
DRV_WIFI_SECURITY_WEP_40 macro 5-653
DRV_WIFI_SECURITY_WPA_AUTO_WITH_KEY macro 5-653
DRV_WIFI_SECURITY_WPA_AUTO_WITH_PASS_PHRASE
macro 5-653
DRV_WIFI_SECURITY_WPA_WITH_KEY macro 5-653
DRV_WIFI_SECURITY_WPA_WITH_PASS_PHRASE macro
5-653
DRV_WIFI_SECURITY_WPA2_WITH_KEY macro 5-654
DRV_WIFI_SECURITY_WPA2_WITH_PASS_PHRASE macro
5-654
DRV_WIFI_SECURITY_WPS_PIN macro 5-654
DRV_WIFI_SECURITY_WPS_PUSH_BUTTON macro 5-654
DRV_WIFI_SecurityGet function 5-627
DRV_WIFI_SecurityOpenSet function 5-628
DRV_WIFI_SecurityWepSet function 5-628
DRV_WIFI_SecurityWpaSet function 5-629
DRV_WIFI_SecurityWpsSet function 5-630
DRV_WIFI_SetLinkDownThreshold function 5-645
DRV_WIFI_SetPSK function 5-646
DRV_WIFI_SOFT_AP_EVENT_REASON_CODES
enumeration 5-667
DRV_WIFI_SOFT_AP_STATES enumeration 5-668
DRV_WIFI_SoftApEventInfoGet function 5-630
DRV_WIFI_SsidGet function 5-631
DRV_WIFI_SsidSet function 5-631
DRV_WIFI_STATUS_CODES enumeration 5-668
DRV_WIFI_SWMULTICAST_CONFIG structure 5-668
DRV_WIFI_SWMultiCastFilterEnable function 5-646
DRV_WIFI_SWMulticastFilterSet function 5-632
DRV_WIFI_TX_MODES enumeration 5-669
DRV_WIFI_TxModeGet function 5-633
DRV_WIFI_TxModeSet function 5-633
DRV_WIFI_TxPowerFactoryMaxGet function 5-634
DRV_WIFI_TxPowerMaxGet function 5-634
DRV_WIFI_TxPowerMaxSet function 5-635
DRV_WIFI_VERSION_NUMBER macro 5-654
DRV_WIFI_WEP_CONTEXT structure 5-669
DRV_WIFI_WEP_KEY_TYPE enumeration 5-670
DRV_WIFI_WEP104_KEY_LENGTH macro 5-654
DRV_WIFI_WEP40_KEY_LENGTH macro 5-654
DRV_WIFI_WepKeyTypeGet function 5-635
DRV_WIFI_WPA_CONTEXT structure 5-670
DRV_WIFI_WPA_KEY_INFO structure 5-671
DRV_WIFI_WPA_KEY_LENGTH macro 5-655
DRV_WIFI_WPA2_KEY_LENGTH macro 5-655
DRV_WIFI_WPS_AUTH_TYPES enumeration 5-671
DRV_WIFI_WPS_CONTEXT structure 5-671
DRV_WIFI_WPS_CREDENTIAL structure 5-672
DRV_WIFI_WPS_ENCODE_TYPES enumeration 5-673
9 MPLAB Harmony Help
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DRV_WIFI_WPS_PIN_LENGTH macro 5-655
DRV_WIFI_WPSCredentialsGet function 5-636
DRV_WIFI_YieldPassphraseToHost function 5-647
DSP Fixed-Point Library 5-1167
DSP Math Library 4-181
dsp.h 5-1268
DSP_ComplexAdd32 function 5-1175
DSP_ComplexConj16 function 5-1175
DSP_ComplexConj32 function 5-1176
DSP_ComplexDotProd32 function 5-1177
DSP_ComplexMult32 function 5-1178
DSP_ComplexScalarMult32 function 5-1179
DSP_ComplexSub32 function 5-1180
DSP_FilterFIR32 function 5-1180
DSP_FilterFIRDecim32 function 5-1182
DSP_FilterFIRInterp32 function 5-1183
DSP_FilterIIR16 function 5-1184
DSP_FilterIIRBQ16 function 5-1185
DSP_FilterIIRBQ16_cascade8 function 5-1187
DSP_FilterIIRBQ16_cascade8_fast function 5-1188
DSP_FilterIIRBQ16_fast function 5-1190
DSP_FilterIIRBQ16_parallel8 function 5-1191
DSP_FilterIIRBQ16_parallel8_fast function 5-1193
DSP_FilterIIRBQ32 function 5-1194
DSP_FilterIIRSetup16 function 5-1195
DSP_FilterLMS16 function 5-1196
DSP_MatrixAdd32 function 5-1197
DSP_MatrixEqual32 function 5-1199
DSP_MatrixInit32 function 5-1199
DSP_MatrixMul32 function 5-1200
DSP_MatrixScale32 function 5-1202
DSP_MatrixSub32 function 5-1202
DSP_MatrixTranspose32 function 5-1204
DSP_TransformFFT16 function 5-1205
DSP_TransformFFT16_setup function 5-1206
DSP_TransformFFT32 function 5-1206
DSP_TransformFFT32_setup function 5-1207
DSP_TransformIFFT16 function 5-1208
DSP_TransformWindow_Bart16 function 5-1209
DSP_TransformWindow_Bart32 function 5-1210
DSP_TransformWindow_Black16 function 5-1211
DSP_TransformWindow_Black32 function 5-1212
DSP_TransformWindow_Cosine16 function 5-1213
DSP_TransformWindow_Cosine32 function 5-1213
DSP_TransformWindow_Hamm16 function 5-1214
DSP_TransformWindow_Hamm32 function 5-1215
DSP_TransformWindow_Hann16 function 5-1216
DSP_TransformWindow_Hann32 function 5-1217
DSP_TransformWindow_Kaiser16 function 5-1217
DSP_TransformWindow_Kaiser32 function 5-1218
DSP_TransformWinInit_Bart16 function 5-1219
DSP_TransformWinInit_Bart32 function 5-1220
DSP_TransformWinInit_Black16 function 5-1220
DSP_TransformWinInit_Black32 function 5-1221
DSP_TransformWinInit_Cosine16 function 5-1222
DSP_TransformWinInit_Cosine32 function 5-1223
DSP_TransformWinInit_Hamm16 function 5-1223
DSP_TransformWinInit_Hamm32 function 5-1224
DSP_TransformWinInit_Hann16 function 5-1225
DSP_TransformWinInit_Hann32 function 5-1225
DSP_TransformWinInit_Kaiser16 function 5-1226
DSP_TransformWinInit_Kaiser32 function 5-1227
DSP_VectorAbs16 function 5-1228
DSP_VectorAbs32 function 5-1228
DSP_VectorAdd16 function 5-1229
DSP_VectorAdd32 function 5-1230
DSP_VectorAddc16 function 5-1231
DSP_VectorAddc32 function 5-1232
DSP_VectorAutocorr16 function 5-1233
DSP_VectorBexp16 function 5-1234
DSP_VectorBexp32 function 5-1234
DSP_VectorChkEqu32 function 5-1235
DSP_VectorCopy function 5-1236
DSP_VectorCopyReverse32 function 5-1237
DSP_VectorDivC function 5-1238
DSP_VectorDotp16 function 5-1238
DSP_VectorDotp32 function 5-1239
DSP_VectorExp function 5-1240
9 MPLAB Harmony Help
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DSP_VectorFill function 5-1241
DSP_VectorLn function 5-1242
DSP_VectorLog10 function 5-1243
DSP_VectorLog2 function 5-1244
DSP_VectorMax32 function 5-1244
DSP_VectorMaxIndex32 function 5-1245
DSP_VectorMean32 function 5-1246
DSP_VectorMin32 function 5-1247
DSP_VectorMinIndex32 function 5-1247
DSP_VectorMul16 function 5-1248
DSP_VectorMul32 function 5-1249
DSP_VectorMulc16 function 5-1250
DSP_VectorMulc32 function 5-1251
DSP_VectorNegate function 5-1252
DSP_VectorRecip function 5-1253
DSP_VectorRMS16 function 5-1254
DSP_VectorShift function 5-1254
DSP_VectorSqrt function 5-1255
DSP_VectorStdDev16 function 5-1256
DSP_VectorSub16 function 5-1257
DSP_VectorSub32 function 5-1258
DSP_VectorSumSquares16 function 5-1259
DSP_VectorSumSquares32 function 5-1259
DSP_VectorVari16 function 5-1260
DSP_VectorVariance function 5-1261
DSP_VectorZeroPad function 5-1262
Dual Compare Continuous Mode 5-2292
Dynamic Configuration 5-3426
Dynamic DNS TCP/IP Stack Library 5-3646
E
EBI Peripheral Library 5-1864
EMAC_RX_BUFF_SIZE macro 5-3750
EMAC_RX_DESCRIPTORS macro 5-3750
EMAC_RX_FRAGMENTS macro 5-3750
EMAC_RX_MAX_FRAME macro 5-3751
EMAC_TX_DESCRIPTORS macro 5-3751
ENABLE_P2P_PRINTS macro 5-673
ENABLE_WPS_PRINTS macro 5-673
EnablePalette function 5-828
Enabling 5-3956
Enabling Events 5-1560
END_OF_SNMP_READ_COMMUNITIES macro 5-3826
END_OF_SNMP_WRITE_COMMUNITIES macro 5-3826
Endpoint Pipes 5-557
Enhanced Buffer Master Mode 5-2807
Enhanced Buffer Slave Mode 5-2809
Enhanced Buffer SPI Mode 5-2807
Error Operation 5-1321
ETH_AUTOPAD_OPTION enumeration 5-2050
ETH_CFG_10 macro 5-3751
ETH_CFG_100 macro 5-3751
ETH_CFG_AUTO macro 5-3751
ETH_CFG_AUTO_MDIX macro 5-3752
ETH_CFG_FDUPLEX macro 5-3752
ETH_CFG_HDUPLEX macro 5-3752
ETH_CFG_LINK macro 5-3752
ETH_CFG_LINK_INIT_DELAY macro 5-3752
ETH_CFG_SWAP_MDIX macro 5-3752
ETH_CLOSE_FLAGS enumeration 5-247
ETH_INTERRUPT_SOURCES enumeration 5-2050
ETH_LINK_STATUS enumeration 5-247
ETH_MIIM_CLK enumeration 5-2050
ETH_MODULE_STATUS enumeration 5-248
ETH_OPEN_FLAGS enumeration 5-248
ETH_PATTERN_MATCH_MODE type 5-2051
ETH_PAUSE_TYPE enumeration 5-249
ETH_RECEIVE_FILTER enumeration 5-2051
ETH_RESULT_CODE enumeration 5-250
ETH_RMII_SPEED enumeration 5-2052
Ethernet Controller Operation 5-1909
Ethernet DMA and Buffer Management Engine 5-1912
Ethernet Frame Overview 5-1909
Ethernet MAC Driver Library 5-226
Ethernet Peripheral Library 5-1902
Ethernet PHY Driver Library 5-254
ETHPHY_CONFIG_FLAGS enumeration 5-251
Event Handling 5-563, 5-3975, 5-3981, 5-4066, 5-4135
9 MPLAB Harmony Help
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Events 5-1317
Example - Channel Scanning 5-1476
Example - Digital Comparator 5-1478
Example - Digital Oversampling Filter 5-1477
Example - Simultaneous Sampling Three Class 1 Inputs 5-1475
Example Code for Complete Operation 5-374
Example Usage of the Timer Driver 5-467
Examples 5-3514
Examples - Sample Functionality 5-609, 5-1324, 5-3366
Exception Generator 5-1522
Explorer 16 Development Board 3-78, 3-104, 3-124, 3-143,
3-171
Explorer 16 PIC32MX795F512L BSP Library 7-4230
Extended ID Message Format 5-1556
EXTPHY_MDIXCONFIGURE type 5-281
EXTPHY_MIICONFIGURE type 5-281
EXTPHY_SMIADDRESSGET type 5-282
EXTPHY_SMICLOCKGET type 5-282
F
Fail-Safe Clock Monitor 5-2335
FAT_FS_MAX_LFN macro 5-3417
FAT_FS_MAX_SS macro 5-3417
FAT_FS_USE_LFN macro 5-3417
File EOF 5-3395
File Seek 5-3396
File System Demonstrations 3-64
File System Service Library 5-3376
File Tell 5-3396
FileFeof type 5-889
FileRead type 5-890
Files 3-111, 3-128, 3-148, 5-192, 5-225, 5-252, 5-286, 5-295,
5-308, 5-318, 5-332, 5-341, 5-365, 5-395, 5-416, 5-454, 5-508,
5-549, 5-598, 5-608, 5-674, 5-1062, 5-1126, 5-1164, 5-1268,
5-1307, 5-1358, 5-1466, 5-1518, 5-1551, 5-1662, 5-1730,
5-1858, 5-1900, 5-2052, 5-2166, 5-2200, 5-2250, 5-2285,
5-2328, 5-2423, 5-2475, 5-2588, 5-2659, 5-2686, 5-2702,
5-2759, 5-2796, 5-2887, 5-3006, 5-3081, 5-3164, 5-3312,
5-3330, 5-3345, 5-3362, 5-3374, 5-3418, 5-3437, 5-3463,
5-3498, 5-3528, 5-3534, 5-3573, 5-3596, 5-3613, 5-3623,
5-3634, 5-3645, 5-3653, 5-3658, 5-3687, 5-3696, 5-3707,
5-3716, 5-3745, 5-3769, 5-3793, 5-3797, 5-3805, 5-3808,
5-3821, 5-3853, 5-3866, 5-3879, 5-3910, 5-3916, 5-3928,
5-3952, 5-3962, 5-4002, 5-4057, 5-4098, 5-4129, 5-4166,
5-4178, 5-4198, 5-4223, 7-4245
Files to Include 5-3979, 5-4007, 5-4064, 5-4104, 5-4133
FileSeek type 5-890
FileTell type 5-890
Filters and Masks Configuration 5-1559
Fixed-Point Math Library 4-182
Flash ECC Operations 5-2434
Flash Operations 5-2256
Flow Control Overview 5-1911
FONT_ORIENTATION enumeration 5-890
Fonts 5-1123
Forming Transfers 5-2084
Framed SPI Modes 5-2810
Framework Help 5-184
FreeRTOS RTOS with Graphics 3-116
FreeRTOS_basic_demo 3-114
FTP TCP/IP Stack Library 5-3654
ftp.h 5-3658
ftp_config.h 5-3659
FTP_MODULE_CONFIG structure 5-3658
Functions 5-301, 5-311, 5-326, 5-335, 5-4201
Functions Registeration Table 5-4013
G
Gated Timer 5-3019
General 5-1367
General Configuration 5-1736
Generating Server Certificates 5-3870
generic_device 3-164
GENERIC_TRAP_NOTIFICATION_TYPE enumeration 5-3847
gethostname function 5-3604
GetPaletteChangeError function 5-828
Getting Help 5-3542
Getting Started 5-3378
gfx.h 5-1062
GFX_ActivePageGet macro 5-947
GFX_ALIGNMENT enumeration 5-890
GFX_ALPHA_PARAMS structure 5-295
GFX_AlphaBlendingValueGet function 5-828
9 MPLAB Harmony Help
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GFX_AlphaBlendingValueSet function 5-829
GFX_AlphaBlendWindow function 5-829
GFX_AlphaParamsSet macro 5-947
GFX_AnalogClockCreate function 5-718
GFX_BACKGROUND structure 5-891
GFX_BACKGROUND_TYPE enumeration 5-891
GFX_BackgroundColorGet function 5-830
GFX_BackgroundImageGet function 5-830
GFX_BackgroundImageLeftGet function 5-830
GFX_BackgroundImageTopGet function 5-831
GFX_BackgroundSet function 5-831
GFX_BackgroundTypeGet function 5-832
GFX_BackgroundTypeSet function 5-832
GFX_BarAlphaDraw function 5-832
GFX_BarDraw function 5-833
GFX_BarGradientDraw function 5-835
GFX_BEVEL_RENDER_TYPE enumeration 5-892
GFX_BevelDraw function 5-836
GFX_BevelDrawTypeGet function 5-836
GFX_BevelDrawTypeSet function 5-836
GFX_BevelGradientDraw function 5-836
GFX_BUFFER1 macro 5-948
GFX_BUFFER2 macro 5-948
GFX_CircleDraw function 5-838
GFX_CircleFillDraw function 5-838
GFX_COLOR type 5-892
GFX_ColorGet function 5-839
gfx_colors.h 5-1063
gfx_colors_w3.h 5-1064
gfx_colors_x11.h 5-1068
GFX_ColorSet function 5-839
GFX_COMP_MASK macro 5-948
GFX_CONFIG_DRIVER_COUNT macro 5-294
GFX_CONFIG_OBJECT_METER_DEGREECOUNT macro
5-948
GFX_CONFIG_OBJECT_METER_RESOLUTION macro 5-948
GFX_CONFIG_OBJECT_METER_SCALE_COUNT macro
5-949
gfx_config_template.h 5-1071
GFX_CosineGet macro 5-1125
GFX_DOUBLE_BUFFERING_MODE structure 5-892
GFX_DoubleBufferAreaGet function 5-840
GFX_DoubleBufferAreaMark function 5-840
GFX_DoubleBufferDisable function 5-840
GFX_DoubleBufferEnable function 5-840
GFX_DoubleBufferStatusGet function 5-841
GFX_DoubleBufferSyncAllStatusClear function 5-841
GFX_DoubleBufferSyncAllStatusGet function 5-841
GFX_DoubleBufferSyncAllStatusSet function 5-841
GFX_DoubleBufferSyncAreaCountGet function 5-841
GFX_DoubleBufferSyncAreaCountSet function 5-841
GFX_DoubleBufferSynchronize function 5-841
GFX_DoubleBufferSynchronizeCancel function 5-841
GFX_DoubleBufferSynchronizeRequest function 5-841
GFX_DoubleBufferSynchronizeSet function 5-841
GFX_DoubleBufferSynchronizeStatusGet function 5-841
GFX_DoubleBufferVisualPageUpdate function 5-842
GFX_DrawBufferGet function 5-842
GFX_DrawBufferSelect function 5-842
GFX_DrawBufferSet function 5-842
GFX_DRV_DATA structure 5-292
GFX_DRV_FontSet function 5-842
GFX_DRV_FUNCTIONS structure 5-293
GFX_DRV_lcc_BrightnessSet function 5-302
GFX_DRV_lcc_Close function 5-301
GFX_DRV_lcc_COMMAND structure 5-306
GFX_DRV_lcc_COMMANDQUEUESIZE macro 5-307
GFX_DRV_lcc_Initialize function 5-302
GFX_DRV_lcc_Layer function 5-305
GFX_DRV_lcc_Open function 5-302
GFX_DRV_lcc_PixelArrayGet function 5-303
GFX_DRV_lcc_PixelArrayPut function 5-303
GFX_DRV_lcc_PixelPut function 5-303
GFX_DRV_lcc_PixelsPut function 5-304
GFX_DRV_lcc_SetColor function 5-304
GFX_DRV_lcc_SetInstance function 5-304
GFX_DRV_lcc_SetPage function 5-305
GFX_DRV_lcc_Tasks function 5-302
GFX_DRV_OTM2201A_AddressSet function 5-312
9 MPLAB Harmony Help
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GFX_DRV_OTM2201A_BrightnessSet function 5-312
GFX_DRV_OTM2201A_Busy function 5-312
GFX_DRV_OTM2201A_Close function 5-313
GFX_DRV_OTM2201A_ColorSet function 5-313
GFX_DRV_OTM2201A_COMMAND structure 5-317
GFX_DRV_OTM2201A_Initialize function 5-313
GFX_DRV_OTM2201A_InstanceSet function 5-314
GFX_DRV_OTM2201A_Open function 5-314
GFX_DRV_OTM2201A_PixelArrayGet function 5-314
GFX_DRV_OTM2201A_PixelArrayPut function 5-315
GFX_DRV_OTM2201A_PixelPut function 5-315
GFX_DRV_OTM2201A_PixelsPut function 5-316
GFX_DRV_OTM2201A_RegGet function 5-316
GFX_DRV_OTM2201A_RegSet function 5-316
GFX_DRV_OTM2201A_Tasks function 5-317
GFX_DRV_S1D13517_AlphaBlendWindow function 5-327
GFX_DRV_S1D13517_BrightnessSet function 5-327
GFX_DRV_S1D13517_Close function 5-327
GFX_DRV_S1D13517_COMMAND structure 5-331
GFX_DRV_S1D13517_GetReg function 5-327
GFX_DRV_S1D13517_Initialize function 5-328
GFX_DRV_S1D13517_Layer function 5-328
GFX_DRV_S1D13517_Open function 5-328
GFX_DRV_S1D13517_PixelArrayPut function 5-329
GFX_DRV_S1D13517_PixelPut function 5-329
GFX_DRV_S1D13517_PixelsPut function 5-329
GFX_DRV_S1D13517_SetColor function 5-330
GFX_DRV_S1D13517_SetInstance function 5-330
GFX_DRV_S1D13517_SetPage function 5-330
GFX_DRV_S1D13517_SetReg function 5-331
GFX_DRV_S1D13517_Tasks function 5-331
GFX_DRV_SSD1926_BarFill function 5-336
GFX_DRV_SSD1926_BrightnessSet function 5-336
GFX_DRV_SSD1926_Busy function 5-336
GFX_DRV_SSD1926_Close function 5-336
GFX_DRV_SSD1926_COMMAND structure 5-340
GFX_DRV_SSD1926_GetReg function 5-337
GFX_DRV_SSD1926_Initialize function 5-337
GFX_DRV_SSD1926_Open function 5-337
GFX_DRV_SSD1926_PixelArrayGet function 5-338
GFX_DRV_SSD1926_PixelArrayPut function 5-338
GFX_DRV_SSD1926_PixelPut function 5-339
GFX_DRV_SSD1926_PixelsPut function 5-339
GFX_DRV_SSD1926_SetColor function 5-339
GFX_DRV_SSD1926_SetInstance function 5-339
GFX_DRV_SSD1926_SetReg function 5-340
GFX_DRV_SSD1926_TASK structure 5-341
GFX_DRV_SSD1926_Tasks function 5-340
GFX_DRV_TextStringWidthGet function 5-842
GFX_ExternalCharInfoGet function 5-843
GFX_ExternalResourceCallback function 5-843
GFX_FEATURE_STATUS enumeration 5-893
GFX_FILL_STYLE enumeration 5-893
GFX_FillStyleGet function 5-844
GFX_FillStyleSet function 5-844
GFX_FlashCharInfoGet function 5-845
GFX_FONT_ANTIALIAS_TYPE enumeration 5-893
GFX_FONT_CURRENT structure 5-894
GFX_FONT_GLYPH_ENTRY structure 5-894
GFX_FONT_GLYPH_ENTRY_EXTENDED structure 5-895
GFX_FONT_HEADER structure 5-895
GFX_FONT_OUTCHAR structure 5-895
GFX_FONT_SPACE macro 5-949
GFX_FontAlignmentSet macro 5-949
GFX_FontAntiAliasGet function 5-845
GFX_FontAntiAliasSet function 5-845
GFX_FontGet function 5-846
GFX_FontSet function 5-846
GFX_FrameBufferGet function 5-846
GFX_FrameBufferSelect function 5-846
GFX_free macro 5-326
gfx_gol.h 5-1072
gfx_gol_analog_clock.h 5-1074
GFX_GOL_ANALOGCLOCK structure 5-896
GFX_GOL_ANALOGCLOCK_DISABLED macro 5-949
GFX_GOL_ANALOGCLOCK_DRAW macro 5-950
GFX_GOL_ANALOGCLOCK_HIDE macro 5-950
GFX_GOL_ANALOGCLOCK_PRESSED macro 5-950
9 MPLAB Harmony Help
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GFX_GOL_ANALOGCLOCK_TICK macro 5-950
GFX_GOL_ANALOGCLOCK_UPDATE_HOUR macro 5-950
GFX_GOL_ANALOGCLOCK_UPDATE_MINUTE macro 5-950
GFX_GOL_ANALOGCLOCK_UPDATE_SECOND macro 5-951
GFX_GOL_AnalogClockDraw function 5-719
GFX_GOL_AnalogClockHandsDraw function 5-720
GFX_GOL_AnalogClockHourSet function 5-721
GFX_GOL_AnalogClockMinuteSet function 5-721
GFX_GOL_AnalogClockSecondSet function 5-722
GFX_GOL_BUTTON structure 5-896
gfx_gol_button.h 5-1075
GFX_GOL_BUTTON_STATE enumeration 5-897
GFX_GOL_ButtonActionGet function 5-722
GFX_GOL_ButtonActionSet function 5-723
GFX_GOL_ButtonCreate function 5-724
GFX_GOL_ButtonDraw function 5-726
GFX_GOL_ButtonPressStateImageGet macro 5-951
GFX_GOL_ButtonPressStateImageSet macro 5-951
GFX_GOL_ButtonReleaseStateImageGet macro 5-952
GFX_GOL_ButtonReleaseStateImageSet macro 5-952
GFX_GOL_ButtonTextAlignmentGet function 5-726
GFX_GOL_ButtonTextAlignmentSet function 5-727
GFX_GOL_ButtonTextGet macro 5-953
GFX_GOL_ButtonTextSet function 5-727
GFX_GOL_CHART structure 5-898
gfx_gol_chart.h 5-1076
GFX_GOL_CHART_3D_ENABLE macro 5-953
GFX_GOL_CHART_BAR macro 5-953
GFX_GOL_CHART_BAR_HOR macro 5-953
GFX_GOL_CHART_DISABLED macro 5-954
GFX_GOL_CHART_DONUT macro 5-954
GFX_GOL_CHART_DRAW macro 5-954
GFX_GOL_CHART_DRAW_DATA macro 5-954
GFX_GOL_CHART_HIDE macro 5-954
GFX_GOL_CHART_LEGEND macro 5-954
GFX_GOL_CHART_NUMERIC macro 5-955
GFX_GOL_CHART_PERCENT macro 5-955
GFX_GOL_CHART_PIE macro 5-955
GFX_GOL_CHART_VALUE macro 5-955
GFX_GOL_ChartActionGet function 5-733
GFX_GOL_ChartAxisLabelFontGet macro 5-955
GFX_GOL_ChartAxisLabelFontSet macro 5-956
GFX_GOL_ChartColorTableGet macro 5-956
GFX_GOL_ChartColorTableSet macro 5-957
GFX_GOL_ChartCreate function 5-734
GFX_GOL_ChartDataSeriesAdd function 5-736
GFX_GOL_ChartDataSeriesFree function 5-736
GFX_GOL_ChartDataSeriesRemove function 5-737
GFX_GOL_ChartDataSeriesSet function 5-737
GFX_GOL_ChartDraw function 5-738
GFX_GOL_ChartGridLabelFontGet macro 5-957
GFX_GOL_ChartGridLabelFontSet macro 5-958
GFX_GOL_ChartPercentMaxGet macro 5-958
GFX_GOL_ChartPercentMinGet macro 5-959
GFX_GOL_ChartPercentRangeGet macro 5-959
GFX_GOL_ChartPercentRangeSet function 5-738
GFX_GOL_ChartSampleEndGet macro 5-960
GFX_GOL_ChartSampleLabelGet macro 5-960
GFX_GOL_ChartSampleLabelSet macro 5-960
GFX_GOL_ChartSampleRangeGet macro 5-961
GFX_GOL_ChartSampleRangeSet function 5-739
GFX_GOL_ChartSampleStartGet macro 5-961
GFX_GOL_ChartSeriesHide macro 5-962
GFX_GOL_ChartShowSeriesCountGet macro 5-962
GFX_GOL_ChartShowSeriesSet macro 5-963
GFX_GOL_ChartShowSeriesStatusGet macro 5-963
GFX_GOL_ChartTitleFontGet macro 5-964
GFX_GOL_ChartTitleFontSet macro 5-964
GFX_GOL_ChartTitleGet macro 5-965
GFX_GOL_ChartTitleSet macro 5-965
GFX_GOL_ChartValueLabelGet macro 5-966
GFX_GOL_ChartValueLabelSet macro 5-966
GFX_GOL_ChartValueMaxGet macro 5-967
GFX_GOL_ChartValueMinGet macro 5-967
GFX_GOL_ChartValueRangeGet macro 5-968
GFX_GOL_ChartValueRangeSet function 5-740
gfx_gol_check_box.h 5-1080
GFX_GOL_CHECKBOX structure 5-898
9 MPLAB Harmony Help
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GFX_GOL_CHECKBOX_STATE enumeration 5-899
GFX_GOL_CheckBoxActionGet function 5-728
GFX_GOL_CheckBoxActionSet function 5-729
GFX_GOL_CheckBoxCreate function 5-730
GFX_GOL_CheckBoxDraw function 5-731
GFX_GOL_CheckBoxTextAlignmentGet function 5-732
GFX_GOL_CheckBoxTextAlignmentSet function 5-732
GFX_GOL_CheckBoxTextGet macro 5-968
GFX_GOL_CheckBoxTextSet function 5-732
gfx_gol_custom_control.h 5-1080
GFX_GOL_CUSTOMCONTROL structure 5-899
GFX_GOL_CUSTOMCONTROL_DISABLED macro 5-969
GFX_GOL_CUSTOMCONTROL_DRAW macro 5-969
GFX_GOL_CUSTOMCONTROL_DRAW_BAR macro 5-969
GFX_GOL_CUSTOMCONTROL_HIDE macro 5-969
GFX_GOL_CustomControlActionGet function 5-740
GFX_GOL_CustomControlActionSet function 5-741
GFX_GOL_CustomControlCreate function 5-741
GFX_GOL_CustomControlDraw function 5-742
GFX_GOL_CustomControlGetPos macro 5-969
GFX_GOL_CustomControlSetPos macro 5-970
gfx_gol_digital_meter.h 5-1081
GFX_GOL_DIGITALMETER structure 5-900
GFX_GOL_DIGITALMETER_INDENT macro 5-970
GFX_GOL_DIGITALMETER_STATE enumeration 5-901
GFX_GOL_DIGITALMETER_WIDTH macro 5-970
GFX_GOL_DigitalMeterActionGet function 5-742
GFX_GOL_DigitalMeterCreate function 5-743
GFX_GOL_DigitalMeterDecrement function 5-744
GFX_GOL_DigitalMeterDraw function 5-745
GFX_GOL_DigitalMeterIncrement function 5-745
GFX_GOL_DigitalMeterTextAlignmentGet macro 5-1057
GFX_GOL_DigitalMeterTextAlignmentSet macro 5-1058
GFX_GOL_DigitalMeterValueGet macro 5-970
GFX_GOL_DigitalMeterValueSet function 5-746
GFX_GOL_DRAW_CALLBACK_FUNC type 5-901
GFX_GOL_DrawCallbackSet function 5-702
gfx_gol_edit_box.h 5-1082
GFX_GOL_EDITBOX structure 5-902
GFX_GOL_EDITBOX_STATE enumeration 5-1056
GFX_GOL_EditBoxActionGet function 5-747
GFX_GOL_EditBoxActionSet function 5-748
GFX_GOL_EditBoxCharAdd function 5-749
GFX_GOL_EditBoxCharRemove function 5-749
GFX_GOL_EditBoxCreate function 5-750
GFX_GOL_EditBoxDraw function 5-751
GFX_GOL_EditBoxTextAlignmentGet macro 5-1058
GFX_GOL_EditBoxTextAlignmentSet macro 5-1059
GFX_GOL_EditBoxTextGet macro 5-1059
GFX_GOL_EditBoxTextSet function 5-751
gfx_gol_font_default.h 5-1083
GFX_GOL_FONT_DEFAULT_H_FILE macro 5-971
gfx_gol_grid.h 5-1083
gfx_gol_group_box.h 5-1085
GFX_GOL_GROUPBOX structure 5-902
GFX_GOL_GROUPBOX_STATE enumeration 5-903
GFX_GOL_GroupboxActionGet function 5-759
GFX_GOL_GroupboxCreate function 5-760
GFX_GOL_GroupboxDraw function 5-761
GFX_GOL_GroupboxTextAlignmentGet function 5-761
GFX_GOL_GroupboxTextAlignmentSet function 5-762
GFX_GOL_GroupboxTextGet macro 5-971
GFX_GOL_GroupboxTextSet function 5-762
gfx_gol_list_box.h 5-1086
GFX_GOL_LISTBOX structure 5-903
GFX_GOL_LISTBOX_ITEM_STATUS enumeration 5-903
GFX_GOL_LISTBOX_STATE enumeration 5-904
GFX_GOL_ListBoxActionGet function 5-763
GFX_GOL_ListBoxActionSet function 5-764
GFX_GOL_ListBoxCreate function 5-765
GFX_GOL_ListBoxDraw function 5-766
GFX_GOL_ListBoxItemAdd function 5-767
GFX_GOL_ListBoxItemCountGet macro 5-972
GFX_GOL_ListBoxItemFocusGet function 5-768
GFX_GOL_ListBoxItemFocusSet function 5-769
GFX_GOL_ListBoxItemImageGet macro 5-972
GFX_GOL_ListBoxItemImageSet macro 5-973
GFX_GOL_ListBoxItemListGet macro 5-973
9 MPLAB Harmony Help
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GFX_GOL_ListBoxItemListRemove function 5-769
GFX_GOL_ListBoxItemRemove function 5-770
GFX_GOL_ListBoxItemSelectStatusClear macro 5-974
GFX_GOL_ListBoxItemSelectStatusSet macro 5-974
GFX_GOL_ListBoxSelectionChange function 5-770
GFX_GOL_ListBoxSelectionGet function 5-771
GFX_GOL_ListBoxTextAlignmentGet macro 5-1060
GFX_GOL_ListBoxTextAlignmentSet macro 5-1060
GFX_GOL_ListBoxVisibleItemCountGet function 5-772
GFX_GOL_LISTITEM structure 5-904
GFX_GOL_MESSAGE structure 5-905
GFX_GOL_MessageCallbackSet function 5-702
GFX_GOL_METER structure 5-906
gfx_gol_meter.h 5-1087
GFX_GOL_METER_DRAW_TYPE enumeration 5-907
GFX_GOL_METER_STATE enumeration 5-907
GFX_GOL_MeterActionGet function 5-772
GFX_GOL_MeterActionSet function 5-773
GFX_GOL_MeterCreate function 5-773
GFX_GOL_MeterDecrement function 5-775
GFX_GOL_MeterDraw function 5-776
GFX_GOL_MeterIncrement function 5-776
GFX_GOL_MeterMaximumValueGet macro 5-975
GFX_GOL_MeterMinimumValueGet macro 5-975
GFX_GOL_MeterRangeSet function 5-777
GFX_GOL_MeterScaleColorsSet function 5-777
GFX_GOL_MeterTitleFontSet macro 5-976
GFX_GOL_MeterTypeSet macro 5-976
GFX_GOL_MeterValueFontSet macro 5-976
GFX_GOL_MeterValueGet macro 5-977
GFX_GOL_MeterValueSet function 5-778
GFX_GOL_OBJ_HEADER structure 5-908
GFX_GOL_OBJ_SCHEME structure 5-908
GFX_GOL_OBJ_TYPE enumeration 5-910
GFX_GOL_ObjectAdd function 5-703
GFX_GOL_ObjectBackGroundSet function 5-704
GFX_GOL_ObjectByIDDelete function 5-704
GFX_GOL_ObjectCanBeFocused function 5-704
GFX_GOL_ObjectDelete function 5-705
GFX_GOL_ObjectDrawDisable function 5-705
GFX_GOL_ObjectDrawEnable function 5-706
GFX_GOL_ObjectFind function 5-707
GFX_GOL_ObjectFocusGet function 5-707
GFX_GOL_ObjectFocusNextGet function 5-708
GFX_GOL_ObjectFocusPrevGet function 5-708
GFX_GOL_ObjectFocusSet function 5-709
GFX_GOL_ObjectHideDraw function 5-709
GFX_GOL_ObjectIDGet function 5-709
GFX_GOL_ObjectIsRedrawSet function 5-710
GFX_GOL_ObjectListDraw function 5-711
GFX_GOL_ObjectListFree function 5-711
GFX_GOL_ObjectListGet function 5-712
GFX_GOL_ObjectListNew function 5-712
GFX_GOL_ObjectListSet function 5-713
GFX_GOL_ObjectMessage function 5-714
GFX_GOL_ObjectNextGet function 5-715
GFX_GOL_ObjectRectangleRedraw function 5-715
GFX_GOL_ObjectStateClear macro 5-978
GFX_GOL_ObjectStateGet macro 5-978
GFX_GOL_ObjectStateSet macro 5-979
GFX_GOL_ObjectTypeGet function 5-716
GFX_GOL_PanelAlphaParameterSet function 5-717
GFX_GOL_PanelBackgroundSet function 5-717
GFX_GOL_PanelDraw function 5-717
GFX_GOL_PanelGradientParameterSet function 5-717
GFX_GOL_PanelParameterSet function 5-717
gfx_gol_picture.h 5-1087
GFX_GOL_PICTURECONTROL structure 5-1056
GFX_GOL_PictureControlActionGet function 5-783
GFX_GOL_PICTURECONTROLCONTROL_STATE
enumeration 5-1057
GFX_GOL_PictureControlCreate function 5-784
GFX_GOL_PictureControlDraw function 5-785
GFX_GOL_PictureControlImageGet macro 5-1061
GFX_GOL_PictureControlImageSet macro 5-1061
GFX_GOL_PictureControlPartialSet function 5-785
GFX_GOL_PictureControlScaleSet macro 5-1062
gfx_gol_progress_bar.h 5-1088
GFX_GOL_PROGRESSBAR structure 5-911
9 MPLAB Harmony Help
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GFX_GOL_PROGRESSBAR_STATE enumeration 5-911
GFX_GOL_ProgressBarActionGet function 5-779
GFX_GOL_ProgressBarCreate function 5-780
GFX_GOL_ProgressBarDraw function 5-781
GFX_GOL_ProgressBarPositionGet macro 5-980
GFX_GOL_ProgressBarPositionSet function 5-782
GFX_GOL_ProgressBarRangeGet macro 5-980
GFX_GOL_ProgressBarRangeSet function 5-782
gfx_gol_radio_button.h 5-1089
GFX_GOL_RADIOBUTTON structure 5-912
GFX_GOL_RADIOBUTTON_STATE enumeration 5-912
GFX_GOL_RadioButtonActionGet function 5-787
GFX_GOL_RadioButtonActionSet function 5-788
GFX_GOL_RadioButtonCheckGet function 5-788
GFX_GOL_RadioButtonCheckSet function 5-790
GFX_GOL_RadioButtonCreate function 5-790
GFX_GOL_RadioButtonDraw function 5-792
GFX_GOL_RadioButtonTextAlignmentGet function 5-792
GFX_GOL_RadioButtonTextAlignmentSet function 5-793
GFX_GOL_RadioButtonTextGet macro 5-980
GFX_GOL_RadioButtonTextSet function 5-793
gfx_gol_round_dial.h 5-1090
GFX_GOL_RoundDailActionGet function 5-794
GFX_GOL_RoundDailActionSet function 5-795
GFX_GOL_ROUNDDIAL structure 5-913
GFX_GOL_ROUNDDIAL_DISABLED macro 5-981
GFX_GOL_ROUNDDIAL_DRAW macro 5-981
GFX_GOL_ROUNDDIAL_HIDE macro 5-981
GFX_GOL_ROUNDDIAL_MAX_POSITIONS macro 5-981
GFX_GOL_ROUNDDIAL_QUADRANT_POSITIONS macro
5-981
GFX_GOL_ROUNDDIAL_ROT_CCW macro 5-982
GFX_GOL_ROUNDDIAL_ROT_CW macro 5-982
GFX_GOL_RoundDialCreate function 5-796
GFX_GOL_RoundDialDraw function 5-797
GFX_GOL_RoundDialValueDecrement macro 5-982
GFX_GOL_RoundDialValueGet macro 5-982
GFX_GOL_RoundDialValueIncrement macro 5-983
GFX_GOL_RoundDialValueSet macro 5-983
gfx_gol_scan_codes.h 5-1091
gfx_gol_scheme.h 5-1092
GFX_GOL_SchemeAlphaPrecentSet function 5-878
GFX_GOL_SchemeBackgroundColorGet function 5-878
GFX_GOL_SchemeBackgroundColorSet function 5-878
GFX_GOL_SchemeBackgroundImageSet function 5-879
GFX_GOL_SchemeBackgroundTypeGet function 5-879
GFX_GOL_SchemeBackgroundTypeSet function 5-879
GFX_GOL_SchemeColor0Get function 5-879
GFX_GOL_SchemeColor0Set function 5-879
GFX_GOL_SchemeColor1Get function 5-880
GFX_GOL_SchemeColor1Set function 5-880
GFX_GOL_SchemeColorDisabledGet function 5-880
GFX_GOL_SchemeColorDisabledSet function 5-880
GFX_GOL_SchemeColorSet function 5-880
GFX_GOL_SchemeEmbossDarkColorGet function 5-881
GFX_GOL_SchemeEmbossDarkColorSet function 5-881
GFX_GOL_SchemeEmbossLightColorGet function 5-881
GFX_GOL_SchemeEmbossLightColorSet function 5-881
GFX_GOL_SchemeEmbossSet function 5-881
GFX_GOL_SchemeEmbossSizeGet function 5-882
GFX_GOL_SchemeEmbossSizeSet function 5-882
GFX_GOL_SchemeFillStyleGet function 5-882
GFX_GOL_SchemeFillStyleSet function 5-882
GFX_GOL_SchemeFontGet function 5-882
GFX_GOL_SchemeFontSet function 5-883
GFX_GOL_SchemeGradientColorSet function 5-883
GFX_GOL_SchemeGradientEndColorGet function 5-883
GFX_GOL_SchemeGradientEndColorSet function 5-883
GFX_GOL_SchemeGradientStartColorGet function 5-883
GFX_GOL_SchemeGradientStartColorSet function 5-884
GFX_GOL_SchemeTextColor0Get function 5-884
GFX_GOL_SchemeTextColor0Set function 5-884
GFX_GOL_SchemeTextColor1Get function 5-884
GFX_GOL_SchemeTextColor1Set function 5-884
GFX_GOL_SchemeTextColorDisableGet function 5-885
GFX_GOL_SchemeTextColorDisableSet function 5-885
GFX_GOL_SchemeTextColorSet function 5-885
gfx_gol_scroll_bar.h 5-1093
GFX_GOL_SCROLLBAR structure 5-914
9 MPLAB Harmony Help
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GFX_GOL_SCROLLBAR_STATE enumeration 5-914
GFX_GOL_ScrollBarActionGet function 5-798
GFX_GOL_ScrollBarActionSet function 5-799
GFX_GOL_ScrollBarCreate function 5-800
GFX_GOL_ScrollBarDraw function 5-802
GFX_GOL_ScrollBarPageGet function 5-802
GFX_GOL_ScrollBarPageSet function 5-803
GFX_GOL_ScrollBarPositionDecrement function 5-804
GFX_GOL_ScrollBarPositionGet function 5-804
GFX_GOL_ScrollBarPositionIncrement function 5-805
GFX_GOL_ScrollBarPositionSet function 5-806
GFX_GOL_ScrollBarRangeGet function 5-807
GFX_GOL_ScrollBarRangeSet function 5-807
gfx_gol_static_text.h 5-1094
GFX_GOL_STATICTEXT structure 5-915
GFX_GOL_STATICTEXT_STATE enumeration 5-915
GFX_GOL_StaticTextActionGet function 5-808
GFX_GOL_StaticTextAlignmentGet function 5-809
GFX_GOL_StaticTextAlignmentSet function 5-809
GFX_GOL_StaticTextCreate function 5-810
GFX_GOL_StaticTextDraw function 5-811
GFX_GOL_StaticTextGet function 5-811
GFX_GOL_StaticTextSet function 5-812
gfx_gol_text_entry.h 5-1095
GFX_GOL_TEXTENTRY structure 5-916
GFX_GOL_TEXTENTRY_KEY_COMMAND_TYPE
enumeration 5-916
GFX_GOL_TEXTENTRY_STATE enumeration 5-917
GFX_GOL_TextEntryActionGet function 5-812
GFX_GOL_TextEntryActionSet function 5-814
GFX_GOL_TextEntryBufferClear function 5-815
GFX_GOL_TextEntryBufferGet function 5-815
GFX_GOL_TextEntryBufferSet function 5-816
GFX_GOL_TextEntryCharAdd function 5-816
GFX_GOL_TextEntryCreate function 5-817
GFX_GOL_TextEntryDraw function 5-818
GFX_GOL_TextEntryKeyCommandGet function 5-819
GFX_GOL_TextEntryKeyCommandSet function 5-819
GFX_GOL_TextEntryKeyIsPressed function 5-820
GFX_GOL_TextEntryKeyListCreate function 5-820
GFX_GOL_TextEntryKeyMemberListDelete function 5-821
GFX_GOL_TextEntryKeyTextSet function 5-821
GFX_GOL_TextEntryLastCharDelete function 5-822
GFX_GOL_TextEntrySpaceCharAdd function 5-822
GFX_GOL_TRANSLATED_ACTION enumeration 5-917
GFX_GOL_TRANSLATED_ACTION, \
GFX_GOL_OBJ_HEADER *, \ GFX_GOL_MESSAGE * \ ) type
5-919
GFX_GOL_TwoTonePanelDraw function 5-718
GFX_GOL_WINDOW structure 5-920
gfx_gol_window.h 5-1096
GFX_GOL_WINDOW_STATE enumeration 5-920
GFX_GOL_WindowActionGet function 5-823
GFX_GOL_WindowCreate function 5-823
GFX_GOL_WindowDraw function 5-824
GFX_GOL_WindowImageGet macro 5-984
GFX_GOL_WindowTextAlignmentGet function 5-825
GFX_GOL_WindowTextAlignmentSet function 5-825
GFX_GOL_WindowTextGet macro 5-984
GFX_GOL_WindowTextSet function 5-826
GFX_GRADIENT_STYLE structure 5-921
GFX_GradientColorSet function 5-847
GFX_GradientEndColorGet function 5-847
GFX_GradientStartColorGet function 5-847
GFX_GradientTypeSet macro 5-1125
gfx_imageDecoder.h 5-1096
GFX_ImageDraw function 5-848
GFX_ImageHeaderGet function 5-848
GFX_ImageHeightGet function 5-849
GFX_ImageOffsetAddressGet function 5-849
GFX_ImagePartialDraw function 5-850
GFX_ImageStretchSet macro 5-985
GFX_ImageWidthGet function 5-851
GFX_Initialize function 5-852
GFX_Layer function 5-852
GFX_LAYER_PARAMS structure 5-295
GFX_LINE_STYLE enumeration 5-921
GFX_LineDraw function 5-853
GFX_LinePositionRelativeSet function 5-853
GFX_LinePositionSet function 5-854
9 MPLAB Harmony Help
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GFX_LinePositionXGet function 5-854
GFX_LinePositionYGet function 5-855
GFX_LineStyleGet function 5-855
GFX_LineStyleSet function 5-855
GFX_LineToDraw function 5-856
GFX_LineToRelativeDraw function 5-856
GFX_malloc macro 5-326
GFX_MAX_INVALIDATE_AREAS macro 5-985
GFX_MaxXGet macro 5-985
GFX_MaxYGet macro 5-985
GFX_MCHP_BITMAP_HEADER structure 5-922
GFX_MEM_MASK macro 5-986
GFX_PageSet function 5-857
gfx_palette.h 5-1098
GFX_PALETTE_ENTRY union 5-922
GFX_PARTIAL_IMAGE_PARAM structure 5-923
GFX_PixelPut macro 5-986
GFX_PixelsPut macro 5-986
GFX_PolygonDraw function 5-857
GFX_PrevAlphaColorGet macro 5-986
GFX_PrevAlphaColorSet macro 5-986
GFX_PRIM_SetPIPWindow function 5-305
gfx_primitive.h 5-1100
GFX_Primitive_DATA structure 5-923
GFX_Primitive_Initialize function 5-858
GFX_Primitive_instance variable 5-888
gfx_primitive_local.h 5-1104
GFX_RectangleDraw function 5-858
GFX_RectangleFillDraw function 5-859
GFX_RectangleRoundDraw function 5-860
GFX_RectangleRoundFillDraw function 5-861
GFX_RECTANGULAR_AREA structure 5-924
GFX_RenderingBufferGet function 5-862
GFX_RenderToDisplayBufferDisable function 5-862
GFX_RenderToDisplayBufferDisableFlagGet function 5-862
GFX_RenderToDisplayBufferEnable function 5-862
GFX_RESOURCE enumeration 5-924
GFX_RESOURCE_BINARY structure 5-926
GFX_RESOURCE_FONT structure 5-927
GFX_RESOURCE_HDR structure 5-927
GFX_RESOURCE_IMAGE structure 5-928
GFX_RESOURCE_PALETTE structure 5-929
GFX_RGBConvert macro 5-987
GFX_ScreenClear function 5-863
GFX_SetFontOrientation macro 5-987
GFX_SetTransitionParameters function 5-863
GFX_SineCosineGet function 5-1124
GFX_SineGet macro 5-1125
GFX_SolidLineDraw function 5-864
GFX_STATUS enumeration 5-929
GFX_STATUS_BIT enumeration 5-929
GFX_StyledLineDraw function 5-864
GFX_TextAreaBottomGet function 5-864
GFX_TextAreaBottomSet function 5-864
GFX_TextAreaLeftGet function 5-865
GFX_TextAreaLeftSet function 5-865
GFX_TextAreaRightGet function 5-865
GFX_TextAreaRightSet function 5-865
GFX_TextAreaTopGet function 5-865
GFX_TextAreaTopSet function 5-865
GFX_TextCharDraw function 5-866
GFX_TextCursorPositionSet function 5-866
GFX_TextCursorPositionXGet function 5-867
GFX_TextCursorPositionYGet function 5-867
GFX_TextStringBoxDraw function 5-868
GFX_TextStringDraw function 5-869
GFX_TextStringHeightGet function 5-869
GFX_TextStringWidthGet function 5-870
GFX_ThickBevelDraw function 5-871
GFX_Transition function 5-871
GFX_TRANSITION_DIRECTION enumeration 5-930
GFX_TRANSITION_PARAMS structure 5-930
GFX_TRANSITION_TYPE enumeration 5-930
gfx_transitions.h 5-1105
GFX_TransparentColorDisable function 5-871
GFX_TransparentColorEnable function 5-872
GFX_TransparentColorGet function 5-873
GFX_TransparentColorStatusGet function 5-873
9 MPLAB Harmony Help
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GFX_TRIG_FUNCTION_TYPE enumeration 5-931
GFX_TYPE_MASK macro 5-988
gfx_types_font.h 5-1107
GFX_TYPES_FONTS_H macro 5-988
gfx_types_image.h 5-1107
GFX_TYPES_IMAGE_H macro 5-988
gfx_types_macros.h 5-1108
gfx_types_palette.h 5-1109
GFX_TYPES_PALETTE_H macro 5-988
gfx_types_resource.h 5-1109
GFX_TYPES_RESOURCE_H macro 5-988
GFX_UXCHAR macro 5-988
GFX_VisualPageGet macro 5-989
GFX_W3_ALICEBLUE macro 5-989
GFX_W3_ANTIQUEWHITE macro 5-989
GFX_W3_AQUA macro 5-989
GFX_W3_AQUAMARINE macro 5-989
GFX_W3_AZURE macro 5-989
GFX_W3_BEIGE macro 5-990
GFX_W3_BISQUE macro 5-990
GFX_W3_BLACK macro 5-990
GFX_W3_BLANCHEDALMOND macro 5-990
GFX_W3_BLUE macro 5-990
GFX_W3_BLUEVIOLET macro 5-990
GFX_W3_BROWN macro 5-990
GFX_W3_BURLYWOOD macro 5-991
GFX_W3_CADETBLUE macro 5-991
GFX_W3_CHARTREUSE macro 5-991
GFX_W3_CHOCOLATE macro 5-991
GFX_W3_CORAL macro 5-991
GFX_W3_CORNFLOWERBLUE macro 5-991
GFX_W3_CORNSILK macro 5-992
GFX_W3_CRIMSON macro 5-992
GFX_W3_CYAN macro 5-992
GFX_W3_DARKBLUE macro 5-992
GFX_W3_DARKCYAN macro 5-992
GFX_W3_darkgoldenrod macro 5-992
GFX_W3_DARKGRAY macro 5-992
GFX_W3_DARKGREEN macro 5-993
GFX_W3_DARKGREY macro 5-993
GFX_W3_DARKHAKI macro 5-993
GFX_W3_DARKMAGENTA macro 5-993
GFX_W3_DARKOLIVEGREEN macro 5-993
GFX_W3_DARKORANGE macro 5-993
GFX_W3_DARKORCHID macro 5-994
GFX_W3_DARKRED macro 5-994
GFX_W3_DARKSALMON macro 5-994
GFX_W3_DARKSEAGREEN macro 5-994
GFX_W3_DARKSLATEBLUE macro 5-994
GFX_W3_DARKSLATEGRAY macro 5-994
GFX_W3_DARKSLATEGREY macro 5-994
GFX_W3_DARKTURQUOISE macro 5-995
GFX_W3_DARKVIOLET macro 5-995
GFX_W3_DEEPPINK macro 5-995
GFX_W3_DEEPSKYBLUE macro 5-995
GFX_W3_DIMGRAY macro 5-995
GFX_W3_DIMGREY macro 5-995
GFX_W3_DODGERBLUE macro 5-996
GFX_W3_FIREBRICK macro 5-996
GFX_W3_FLORALWHITE macro 5-996
GFX_W3_FORESTGREEN macro 5-996
GFX_W3_FUCHSIA macro 5-996
GFX_W3_GAINSBORO macro 5-996
GFX_W3_GHOSTWHITE macro 5-996
GFX_W3_GOLD macro 5-997
GFX_W3_GOLDENROD macro 5-997
GFX_W3_GRAY macro 5-997
GFX_W3_GREEN macro 5-997
GFX_W3_GREENYELLOW macro 5-997
GFX_W3_GREY macro 5-997
GFX_W3_HONEYDEW macro 5-998
GFX_W3_HOTPINK macro 5-998
GFX_W3_INDIANRED macro 5-998
GFX_W3_INDIGO macro 5-998
GFX_W3_IVORY macro 5-998
GFX_W3_LAVENDER macro 5-998
GFX_W3_LAVENDERBLUSH macro 5-998
GFX_W3_LAWNGREEN macro 5-999
9 MPLAB Harmony Help
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GFX_W3_LEMONCHIFFON macro 5-999
GFX_W3_LIGHTBLUE macro 5-999
GFX_W3_LIGHTCORAL macro 5-999
GFX_W3_LIGHTCYAN macro 5-999
GFX_W3_LIGHTGOLDENRODYELLOW macro 5-999
GFX_W3_LIGHTGRAY macro 5-1000
GFX_W3_LIGHTGREEN macro 5-1000
GFX_W3_LIGHTGREY macro 5-1000
GFX_W3_LIGHTPINK macro 5-1000
GFX_W3_LIGHTSALMON macro 5-1000
GFX_W3_LIGHTSKYBLUE macro 5-1000
GFX_W3_LIGHTSLATEGRAY macro 5-1000
GFX_W3_LIGHTSLATEGREY macro 5-1001
GFX_W3_LIGHTSTEELBLUE macro 5-1001
GFX_W3_LIGHTYELLOW macro 5-1001
GFX_W3_LIGTHSEAGREEN macro 5-1001
GFX_W3_LIME macro 5-1001
GFX_W3_LIMEGREEN macro 5-1001
GFX_W3_LINEN macro 5-1002
GFX_W3_MAGENTA macro 5-1002
GFX_W3_MAROON macro 5-1002
GFX_W3_MEDIUMAQUAMARINE macro 5-1002
GFX_W3_MEDIUMBLUE macro 5-1002
GFX_W3_MEDIUMORCHID macro 5-1002
GFX_W3_MEDIUMPURPLE macro 5-1002
GFX_W3_MEDIUMSEAGREEN macro 5-1003
GFX_W3_MEDIUMSLATEBLUE macro 5-1003
GFX_W3_MEDIUMSPRINGGREEN macro 5-1003
GFX_W3_MEDIUMTURQUOISE macro 5-1003
GFX_W3_MEDIUMVIOLETRED macro 5-1003
GFX_W3_MIDNIGHTBLUE macro 5-1003
GFX_W3_MINTCREAM macro 5-1004
GFX_W3_MISTYROSE macro 5-1004
GFX_W3_MOCCASIN macro 5-1004
GFX_W3_NAVAJOWHITE macro 5-1004
GFX_W3_NAVY macro 5-1004
GFX_W3_OLDLACE macro 5-1004
GFX_W3_OLIVE macro 5-1004
GFX_W3_OLIVEDRAB macro 5-1005
GFX_W3_ORANGE macro 5-1005
GFX_W3_ORANGERED macro 5-1005
GFX_W3_ORCHID macro 5-1005
GFX_W3_PALEGOLDENROD macro 5-1005
GFX_W3_PALEGREEN macro 5-1005
GFX_W3_PALETURQUOISE macro 5-1006
GFX_W3_PALEVIOLETRED macro 5-1006
GFX_W3_PAPAYAWHIP macro 5-1006
GFX_W3_PEACHPUFF macro 5-1006
GFX_W3_PERU macro 5-1006
GFX_W3_PINK macro 5-1006
GFX_W3_PLUM macro 5-1006
GFX_W3_POWDERBLUE macro 5-1007
GFX_W3_PURPLE macro 5-1007
GFX_W3_RED macro 5-1007
GFX_W3_ROSYBROWN macro 5-1007
GFX_W3_ROYALBLUE macro 5-1007
GFX_W3_SADDLEBROWN macro 5-1007
GFX_W3_SALMON macro 5-1008
GFX_W3_SANDYGREEN macro 5-1008
GFX_W3_SEAGREEN macro 5-1008
GFX_W3_SEASHELL macro 5-1008
GFX_W3_SIENNA macro 5-1008
GFX_W3_SILVER macro 5-1008
GFX_W3_SKYBLUE macro 5-1008
GFX_W3_SLATEBLUE macro 5-1009
GFX_W3_SLATEGRAY macro 5-1009
GFX_W3_SLATEGREY macro 5-1009
GFX_W3_SNOW macro 5-1009
GFX_W3_SPRINGGREEN macro 5-1009
GFX_W3_STEELBLUE macro 5-1009
GFX_W3_TAN macro 5-1010
GFX_W3_TEAL macro 5-1010
GFX_W3_THISTLE macro 5-1010
GFX_W3_TOMATO macro 5-1010
GFX_W3_TURQUOISE macro 5-1010
GFX_W3_VIOLET macro 5-1010
GFX_W3_WHEAT macro 5-1010
GFX_W3_WHITE macro 5-1011
9 MPLAB Harmony Help
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GFX_W3_WHITESMOKE macro 5-1011
GFX_W3_YELLOW macro 5-1011
GFX_W3_YELLOWGREEN macro 5-1011
GFX_X11_ALICE_BLUE macro 5-1011
GFX_X11_ANTIQUE_WHITE macro 5-1011
GFX_X11_AQUA macro 5-1012
GFX_X11_AQUAMARINE macro 5-1012
GFX_X11_AZURE macro 5-1012
GFX_X11_BEIGE macro 5-1012
GFX_X11_BISQUE macro 5-1012
GFX_X11_BLACK macro 5-1012
GFX_X11_BLANCHED_ALMOND macro 5-1012
GFX_X11_BLUE macro 5-1013
GFX_X11_BLUE_VIOLET macro 5-1013
GFX_X11_BROWN macro 5-1013
GFX_X11_BURLY_WOOD macro 5-1013
GFX_X11_CADEL_BLUE macro 5-1013
GFX_X11_CHARTEUSE macro 5-1013
GFX_X11_CHOCOLATE macro 5-1014
GFX_X11_CORAL macro 5-1014
GFX_X11_CORNFLOWER_BLUE macro 5-1014
GFX_X11_CORNSILK macro 5-1014
GFX_X11_CRIMSON macro 5-1014
GFX_X11_CYAN macro 5-1014
GFX_X11_DARK_BLUE macro 5-1014
GFX_X11_DARK_CYAN macro 5-1015
GFX_X11_DARK_GOLDENROD macro 5-1015
GFX_X11_DARK_GREEN macro 5-1015
GFX_X11_DARK_GREY macro 5-1015
GFX_X11_DARK_KHAKI macro 5-1015
GFX_X11_DARK_MAGENTA macro 5-1015
GFX_X11_DARK_OLIVE_GREEN macro 5-1016
GFX_X11_DARK_ORANGE macro 5-1016
GFX_X11_DARK_ORCHID macro 5-1016
GFX_X11_DARK_RED macro 5-1016
GFX_X11_DARK_SALMON macro 5-1016
GFX_X11_DARK_SEA_GREEN macro 5-1016
GFX_X11_DARK_SLATE_BLUE macro 5-1016
GFX_X11_DARK_SLATE_GREY macro 5-1017
GFX_X11_DARK_TURQUOISE macro 5-1017
GFX_X11_DARK_VIOLET macro 5-1017
GFX_X11_DEEP_PINK macro 5-1017
GFX_X11_DEEP_SKY_BLUE macro 5-1017
GFX_X11_DIM_GREY macro 5-1017
GFX_X11_DODGER_BLUE macro 5-1018
GFX_X11_FIRE_BRICK macro 5-1018
GFX_X11_FLORAL_WHITE macro 5-1018
GFX_X11_FOREST_GREEN macro 5-1018
GFX_X11_FUCHSIA macro 5-1018
GFX_X11_GAINSBORO macro 5-1018
GFX_X11_GHOST_WHITE macro 5-1018
GFX_X11_GOLD macro 5-1019
GFX_X11_GOLDENROD macro 5-1019
GFX_X11_GREEN macro 5-1019
GFX_X11_GREEN_YELLOW macro 5-1019
GFX_X11_GREY macro 5-1019
GFX_X11_HONEYDEW macro 5-1019
GFX_X11_HOT_PINK macro 5-1020
GFX_X11_INDIAN_RED macro 5-1020
GFX_X11_INDIGO macro 5-1020
GFX_X11_IVORY macro 5-1020
GFX_X11_KHAKI macro 5-1020
GFX_X11_LAVENDER macro 5-1020
GFX_X11_LAVENDOR_BLUSH macro 5-1020
GFX_X11_LAWN_GREEN macro 5-1021
GFX_X11_LEMON_CHIFFON macro 5-1021
GFX_X11_LIGHT_BLUE macro 5-1021
GFX_X11_LIGHT_CAROL macro 5-1021
GFX_X11_LIGHT_CYAN macro 5-1021
GFX_X11_LIGHT_GOLDENROD_YELLOW macro 5-1021
GFX_X11_LIGHT_GRAY macro 5-1022
GFX_X11_LIGHT_GREEN macro 5-1022
GFX_X11_LIGHT_PINK macro 5-1022
GFX_X11_LIGHT_SALMON macro 5-1022
GFX_X11_LIGHT_SEA_GREEN macro 5-1022
GFX_X11_LIGHT_SKY_BLUE macro 5-1022
GFX_X11_LIGHT_SLATE_GREY macro 5-1022
GFX_X11_LIGHT_STEEL_BLUE macro 5-1023
9 MPLAB Harmony Help
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GFX_X11_LIGHT_YELLOW macro 5-1023
GFX_X11_LIME macro 5-1023
GFX_X11_LIME_GREEN macro 5-1023
GFX_X11_LINEN macro 5-1023
GFX_X11_MAGENTA macro 5-1023
GFX_X11_MARRON macro 5-1024
GFX_X11_MEDIUM_AQUAMARINE macro 5-1024
GFX_X11_MEDIUM_BLUE macro 5-1024
GFX_X11_MEDIUM_ORCHID macro 5-1024
GFX_X11_MEDIUM_PURPLE macro 5-1024
GFX_X11_MEDIUM_SEA_GREEN macro 5-1024
GFX_X11_MEDIUM_SLATE_BLUE macro 5-1024
GFX_X11_MEDIUM_SPRING_GREEN macro 5-1025
GFX_X11_MEDIUM_TURQUOISE macro 5-1025
GFX_X11_MEDIUM_VIOLET_RED macro 5-1025
GFX_X11_MIDNIGHT_BLUE macro 5-1025
GFX_X11_MINT_CREAM macro 5-1025
GFX_X11_MISTY_ROSE macro 5-1025
GFX_X11_MOCCASIN macro 5-1026
GFX_X11_NAVAJO_WHITE macro 5-1026
GFX_X11_NAVY macro 5-1026
GFX_X11_OLD_LACE macro 5-1026
GFX_X11_OLIVE macro 5-1026
GFX_X11_OLIVE_DRAB macro 5-1026
GFX_X11_ORANGE macro 5-1026
GFX_X11_ORANGE_RED macro 5-1027
GFX_X11_ORCHID macro 5-1027
GFX_X11_PALE_GOLDENROD macro 5-1027
GFX_X11_PALE_GREEN macro 5-1027
GFX_X11_PALE_TURQUOISE macro 5-1027
GFX_X11_PALE_VIOLET_RED macro 5-1027
GFX_X11_PAPAYA_WHIP macro 5-1028
GFX_X11_PEACH_PUFF macro 5-1028
GFX_X11_PERU macro 5-1028
GFX_X11_PINK macro 5-1028
GFX_X11_PLUM macro 5-1028
GFX_X11_POWDER_BLUE macro 5-1028
GFX_X11_PURPLE macro 5-1028
GFX_X11_RED macro 5-1029
GFX_X11_ROSY_BROWN macro 5-1029
GFX_X11_ROYAL_BLUE macro 5-1029
GFX_X11_SADDLE_BROWN macro 5-1029
GFX_X11_SALMON macro 5-1029
GFX_X11_SANDY_BROWN macro 5-1029
GFX_X11_SEA_GREEN macro 5-1030
GFX_X11_SEASHELL macro 5-1030
GFX_X11_SIENNA macro 5-1030
GFX_X11_SILVER macro 5-1030
GFX_X11_SKY_BLUE macro 5-1030
GFX_X11_SLATE_BLUE macro 5-1030
GFX_X11_SLATE_GREY macro 5-1030
GFX_X11_SNOW macro 5-1031
GFX_X11_SPRING_GREEN macro 5-1031
GFX_X11_STEEL_BLUE macro 5-1031
GFX_X11_TAN macro 5-1031
GFX_X11_TEAL macro 5-1031
GFX_X11_THISTLE macro 5-1031
GFX_X11_TOMATO macro 5-1032
GFX_X11_TURQUOISE macro 5-1032
GFX_X11_VIOLET macro 5-1032
GFX_X11_WHEAT macro 5-1032
GFX_X11_WHITE macro 5-1032
GFX_X11_WHITE_SMOKE macro 5-1032
GFX_X11_YELLOW macro 5-1032
GFX_X11_YELLOW_GREEN macro 5-1033
GFX_XCHAR macro 5-1033
GFXCirclePointGet function 5-1125
GOL_PANEL_PARAM structure 5-932
GOLD macro 5-1033
Gradients 5-1114
Graphic Display Driver Layer Changes 5-683
Graphic Object Layer (GOL) Changes 5-683
Graphic Primitive Layer Changes 5-682
Graphics (GFX) Driver Library 5-289
Graphics Demonstrations 3-84
Graphics Library Help 5-680
Graphics Library Porting Guide 5-680
Graphics Object Library 5-694
9 MPLAB Harmony Help
dd
Graphics Primitive Library 5-1110
GRAPHICS_LIBRARY_VERSION macro 5-1033
GRAY000 macro 5-1034
GRAY001 macro 5-1034
GRAY002 macro 5-1034
GRAY003 macro 5-1034
GRAY004 macro 5-1034
GRAY005 macro 5-1034
GRAY006 macro 5-1034
GRAY007 macro 5-1035
GRAY008 macro 5-1035
GRAY009 macro 5-1035
GRAY010 macro 5-1035
GRAY011 macro 5-1035
GRAY012 macro 5-1035
GRAY013 macro 5-1036
GRAY014 macro 5-1036
GRAY015 macro 5-1036
GRAY032 macro 5-1036
GRAY096 macro 5-1036
GRAY128 macro 5-1036
GRAY160 macro 5-1036
GRAY192 macro 5-1037
GRAY204 macro 5-1037
GRAY224 macro 5-1037
GRAY229 macro 5-1037
GRAY242 macro 5-1037
GREEN macro 5-1037
GRID structure 5-932
GRID_DISABLED macro 5-1038
GRID_DRAW_ALL macro 5-1038
GRID_DRAW_ITEMS macro 5-1038
GRID_FOCUSED macro 5-1038
GRID_HEIGHT macro 5-1038
GRID_HIDE macro 5-1038
GRID_MAX_COLUMNS macro 5-1039
GRID_MAX_ROWS macro 5-1039
GRID_OUT_OF_BOUNDS macro 5-1039
GRID_SHOW_BORDER_ONLY macro 5-1039
GRID_SHOW_FOCUS macro 5-1039
GRID_SHOW_LINES macro 5-1039
GRID_SHOW_SEPARATORS_ONLY macro 5-1039
GRID_SUCCESS macro 5-1040
GRID_TYPE_MASK macro 5-1040
GRID_WIDTH macro 5-1040
GridClearCellState function 5-752
GridCreate function 5-753
GridDraw function 5-754
GridFreeItems function 5-754
GridGetCell function 5-755
GridGetFocusX macro 5-1040
GridGetFocusY macro 5-1041
GRIDITEM structure 5-933
GRIDITEM_DRAW macro 5-1041
GRIDITEM_IS_BITMAP macro 5-1041
GRIDITEM_IS_TEXT macro 5-1041
GRIDITEM_SELECTED macro 5-1041
GRIDITEM_TEXTBOTTOM macro 5-1042
GRIDITEM_TEXTLEFT macro 5-1042
GRIDITEM_TEXTRIGHT macro 5-1042
GRIDITEM_TEXTTOP macro 5-1042
GridMsgDefault function 5-755
GridSetCell function 5-756
GridSetCellState function 5-757
GridSetFocus function 5-757
GridTranslateMsg function 5-758
H
Handling Endpoint 0 (EP0) Packets 5-3976
Handling Errors 5-2085, 5-2487
Handling Events 5-1562
Hardware 3-103, 3-124, 3-143
Hardware Abstraction Model 5-1362, 5-1473, 5-1521, 5-1564,
5-1669, 5-1735, 5-1905, 5-2087, 5-2172, 5-2203, 5-2253,
5-2289, 5-2332, 5-2429, 5-2479, 5-2595, 5-2663, 5-2689,
5-2705, 5-2763, 5-2801, 5-2893, 5-3012, 5-3087, 5-3322
Hardware Abstraction Models 5-3171
Hardware Drivers 5-309
Hardware Information 3-103, 3-124, 3-143
9 MPLAB Harmony Help
ee
help_sys_ports.h 5-3498
hid_basic 3-158
hid_joystick 3-161
hid_keyboard 3-161
hid_mouse 3-160
HIDE_DATA macro 5-1042
Host 3-167
How the Library Works 5-195, 5-345, 5-369, 5-399, 5-421,
5-459, 5-514, 5-554, 5-607, 5-697, 5-1112, 5-1315, 5-1367,
5-1474, 5-1522, 5-1555, 5-1670, 5-1736, 5-1866, 5-1906,
5-2061, 5-2173, 5-2205, 5-2255, 5-2290, 5-2333, 5-2431,
5-2480, 5-2598, 5-2666, 5-2690, 5-2707, 5-2764, 5-2802,
5-2896, 5-3015, 5-3088, 5-3321, 5-3350, 5-3365, 5-3422,
5-3443, 5-3470, 5-3506, 5-3531, 5-3576, 5-3616, 5-3627,
5-3869, 5-3883, 5-3932, 5-4007, 5-4170
HTTP Changes 5-3551
HTTP Server TCP/IP Stack Library 5-3659
http.h 5-3688
HTTP_CACHE_LEN macro 5-3662
http_config.h 5-3689
HTTP_CONFIG_FLAGS macro 5-3662
HTTP_CONN_HANDLE type 5-3684
HTTP_DEFAULT_FILE macro 5-3662
HTTP_DEFAULT_LEN macro 5-3663
HTTP_FILE_TYPE enumeration 5-3684
HTTP_FILE_UPLOAD macro 5-3663
HTTP_IO_RESULT enumeration 5-3684
HTTP_MAX_CONNECTIONS macro 5-3663
HTTP_MAX_DATA_LEN macro 5-3663
HTTP_MAX_HEADER_LEN macro 5-3663
HTTP_MIN_CALLBACK_FREE macro 5-3663
HTTP_MODULE_CONFIG structure 5-3685
HTTP_MODULE_FLAGS enumeration 5-3685
HTTP_PORT macro 5-3664
HTTP_READ_STATUS enumeration 5-3685
HTTP_SKT_RX_BUFF_SIZE macro 5-3664
HTTP_SKT_TX_BUFF_SIZE macro 5-3664
HTTP_SSL_ONLY_CHAR macro 5-3664
HTTP_STATUS enumeration 5-3686
HTTP_TIMEOUT macro 5-3664
HTTP_USE_AUTHENTICATION macro 5-3664
HTTP_USE_COOKIES macro 5-3665
HTTP_USE_POST macro 5-3665
HTTPCheckAuth function 5-3679
HTTPExecuteGet function 5-3680
HTTPExecutePost function 5-3681
HTTPNeedsAuth function 5-3682
HTTPPrint_varname function 5-3683
HTTPReadPostPair macro 5-3687
HTTPS_DEFAULT_FILE macro 5-3665
HTTPS_PORT macro 5-3665
I
I2C Peripheral Library 5-2059
I2C_MODULE_ID enumeration 5-2165
IC_BUFFER_SIZE enumeration 5-2188
IC_CLOCK_SOURCES enumeration 5-2188
IC_EDGE_TYPES enumeration 5-2189
IC_EVENTS_PER_INTERRUPT enumeration 5-2189
IC_INPUT_CAPTURE_MODES enumeration 5-2189
IC_MODULE_ID enumeration 5-2190
IC_SYNC_MODE_INPUTS enumeration 5-2191
IC_SYNC_MODES enumeration 5-2192
IC_TIMERS enumeration 5-2192
ICMP TCP/IP Stack Library 5-3690
icmp.h 5-3696
icmp_config.h 5-3697
ICMP_ECHO_RESULT enumeration 5-3695
ICMP_HANDLE type 5-3695
ICMP_MODULE_CONFIG structure 5-3696
ICMP_TIMEOUT macro 5-3692
ICMPv6 TCP/IP Stack Library 5-3697
icmpv6.h 5-3707
icmpv6_config.h 5-3708
ICMPV6_ERR_DU_CODE enumeration 5-3704
ICMPV6_ERR_PP_CODE enumeration 5-3705
ICMPV6_ERR_PTB_CODE macro 5-3703
ICMPV6_ERR_TE_CODE enumeration 5-3705
ICMPV6_HANDLE type 5-3705
ICMPV6_HEADER_ECHO structure 5-3706
ICMPV6_HEADER_ERROR structure 5-3706
9 MPLAB Harmony Help
ff
ICMPV6_INFO_EREQ_CODE macro 5-3704
ICMPV6_INFO_ERPL_CODE macro 5-3704
ICMPV6_PACKET_TYPES enumeration 5-3706
ICMPV6_TIMEOUT macro 5-3700
IMAGE_STRETCH enumeration 5-933
ImageAbort macro 5-1042
ImageDecoderInit function 5-874
ImageDecodeTask function 5-874
ImageFullScreenDecode macro 5-1043
ImageLoopCallbackRegister function 5-875
Images 5-1117, 5-1124
IMG_ALIGN_CENTER macro 5-1044
IMG_bAlignCenter variable 5-885
IMG_bDownScalingFactor variable 5-885
IMG_blAbortImageDecoding variable 5-886
IMG_DECODE_ABORTED macro 5-1044
IMG_DOWN_SCALE macro 5-1044
IMG_FCLOSE macro 5-1044
IMG_FEOF macro 5-1044
IMG_FILE macro 5-1044
IMG_FILE_FORMAT type 5-933
IMG_FILE_SYSTEM_API type 5-933
IMG_FOPEN macro 5-1045
IMG_FREAD macro 5-1045
IMG_FSEEK macro 5-1045
IMG_FTELL macro 5-1045
IMG_LOOP_CALLBACK type 5-933
IMG_pCurrentFile variable 5-886
IMG_pFileAPIs variable 5-886
IMG_PIXEL_OUTPUT type 5-934
IMG_PIXEL_XY_RGB_888 type 5-934
IMG_PixelXYColor variable 5-886
IMG_pLoopCallbackFn variable 5-886
IMG_pPixelOutput variable 5-886
IMG_SCREEN_HEIGHT macro 5-1045
IMG_SCREEN_WIDTH macro 5-1045
IMG_vCheckAndAbort macro 5-1045
IMG_vLoopCallback macro 5-1046
IMG_vPutPixel macro 5-1046
IMG_vSetboundaries function 5-875
IMG_vSetColor macro 5-1046
IMG_wHeight variable 5-886
IMG_wImageHeight variable 5-887
IMG_wImageWidth variable 5-887
IMG_wStartX variable 5-887
IMG_wStartY variable 5-887
IMG_wWidth variable 5-887
in_addr structure 5-3611
INADDR_ANY macro 5-3609
Initator Initialization 5-2764
Initialization 5-1367, 5-1670, 5-1915, 5-2481, 5-3350, 5-3387
Initialization Functions 7-4238
Initialization of CAN 5-1557
Initialization Overrides 5-474, 5-574, 5-608, 5-1323
Initializing and Communicating with the Endpoint 5-3975
Initializing the Data Structure 5-4014
Initializing the I2C 5-2061
Initializing the Library 5-3980, 5-4007
Initializing the USB Device Stack 5-3973
Input Capture Module Setup 5-2173
Input Capture Peripheral Library 5-2170
INPUT_DEVICE_EVENT enumeration 5-934
INPUT_DEVICE_TYPE enumeration 5-935
Installing the Configurator Plug-in 2-42
INT_EXTERNAL_SOURCES enumeration 5-2232
INT_PRIORITY_LEVEL enumeration 5-2233
INT_SOURCE enumeration 5-2233
INT_SUBPRIORITY_LEVEL enumeration 5-2237
INT_TRAP_SOURCE enumeration 5-2238
INT_VECTOR enumeration 5-2238
int16_gfx_image_prog type 5-935
int16_prog type 5-935
int16_prog_pack type 5-935
int16c structure 5-1264
int32_gfx_image_prog type 5-936
int32_prog type 5-936
int32_prog_pack type 5-936
int32c structure 5-1265
9 MPLAB Harmony Help
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int8_gfx_image_prog type 5-936
int8_prog type 5-936
int8_prog_pack type 5-936
Internal FRC Oscillator Tuning 5-2335
Interrupt Control and Management 5-1738
Interrupt Operation 5-1320
Interrupt Peripheral Library 5-2202
Interrupt State Machine 5-2076
Interrupt System Service Library 5-3419
Interrupt System Setup 5-3422
Interrupts 5-2823
Introduction 2-40, 3-64, 3-84, 3-98, 3-102, 3-113, 3-123, 3-130,
3-142, 3-149, 4-178, 5-193, 5-226, 5-254, 5-289, 5-299, 5-309,
5-319, 5-333, 5-342, 5-367, 5-397, 5-418, 5-457, 5-510, 5-552,
5-600, 5-680, 5-694, 5-1110, 5-1127, 5-1167, 5-1275, 5-1311,
5-1361, 5-1471, 5-1519, 5-1553, 5-1667, 5-1733, 5-1864,
5-1902, 5-2059, 5-2170, 5-2202, 5-2252, 5-2287, 5-2330,
5-2427, 5-2478, 5-2593, 5-2662, 5-2687, 5-2703, 5-2762,
5-2798, 5-2891, 5-3011, 5-3085, 5-3167, 5-3319, 5-3347,
5-3363, 5-3376, 5-3419, 5-3438, 5-3465, 5-3500, 5-3529,
5-3536, 5-3546, 5-3569, 5-3574, 5-3598, 5-3614, 5-3625,
5-3636, 5-3646, 5-3654, 5-3659, 5-3690, 5-3697, 5-3709,
5-3718, 5-3747, 5-3771, 5-3794, 5-3798, 5-3806, 5-3809,
5-3822, 5-3858, 5-3867, 5-3881, 5-3913, 5-3917, 5-3930,
5-3955, 5-3963, 5-3973, 5-3977, 5-4004, 5-4060, 5-4100,
5-4131, 5-4168, 5-4179, 5-4199, 6-4226, 7-4228, 7-4230,
7-4232, 7-4234, 7-4236
INVALID_SOCKET macro 5-3910
INVALID_TCP_PORT macro 5-3609
INVALID_UDP_SOCKET macro 5-3950
IP_ADDR_ANY macro 5-3609
ip_config.h 5-3716, 5-3747
IP_DEFAULT_ALLOCATION_BLOCK_SIZE macro 5-3711
IP_VERSION_4 macro 5-3735
IP_VERSION_6 macro 5-3735
IPPROTO_IP macro 5-3609
IPPROTO_TCP macro 5-3609
IPPROTO_UDP macro 5-3609
IPv4 TCP/IP Stack Library 5-3708
ipv4.h 5-3717
IPV4_HEADER structure 5-3715
IPV4_HEADER_TYPE enumeration 5-3715
IPV4_MODULE_CONFIG structure 5-3715
IPV4_PACKET structure 5-3716
IPV4_QUEUED_PACKET_LIMIT macro 5-3711
IPV4_QUEUED_PACKET_TIMEOUT macro 5-3711
IPV4_TASK_PROCESS_RATE macro 5-3711
IPv6 TCP/IP Stack Library 5-3718
ipv6.h 5-3745
IPV6_ACTION enumeration 5-3739
IPV6_ADDRESS_POLICY structure 5-3739
IPV6_ADDRESS_PREFERENCE enumeration 5-3739
IPV6_ADDRESS_TYPE union 5-3739
IPV6_DATA_DYNAMIC_BUFFER macro 5-3735
IPV6_DATA_NETWORK_FIFO macro 5-3736
IPV6_DATA_NONE macro 5-3736
IPV6_DATA_PIC_RAM macro 5-3736
IPV6_DATA_SEGMENT_HEADER type 5-3740
IPV6_DEFAULT_BASE_REACHABLE_TIME macro 5-3722
IPV6_DEFAULT_CUR_HOP_LIMIT macro 5-3722
IPV6_DEFAULT_LINK_MTU macro 5-3722
IPV6_DEFAULT_RETRANSMIT_TIME macro 5-3722
IPV6_EVENT_HANDLER type 5-3740
IPV6_EVENT_TYPE enumeration 5-3740
IPV6_FRAGMENT_HEADER structure 5-3741
IPV6_HANDLE type 5-3741
IPV6_HEADER structure 5-3741
IPV6_HEADER_OFFSET_DEST_ADDR macro 5-3736
IPV6_HEADER_OFFSET_NEXT_HEADER macro 5-3736
IPV6_HEADER_OFFSET_PAYLOAD_LENGTH macro 5-3736
IPV6_HEADER_OFFSET_SOURCE_ADDR macro 5-3737
IPV6_INIT_TASK_PROCESS_RATE macro 5-3720
IPV6_MINIMUM_LINK_MTU macro 5-3721
IPV6_MODULE_CONFIG structure 5-3742
IPV6_MTU_INCREASE_TIMEOUT macro 5-3802
IPV6_NEIGHBOR_CACHE_ENTRY_STALE_TIMEOUT macro
5-3721
IPV6_NEXT_HEADER_TYPE enumeration 5-3742
IPV6_NO_UPPER_LAYER_CHECKSUM macro 5-3737
IPV6_PACKET type 5-3743
IPV6_PACKET_ACK_FNC type 5-3743
IPV6_QUEUE_MCAST_PACKET_LIMIT macro 5-3721
IPV6_QUEUE_NEIGHBOR_PACKET_LIMIT macro 5-3721
IPV6_QUEUED_MCAST_PACKET_TIMEOUT macro 5-3721
IPV6_RX_FRAGMENT_BUFFER type 5-3743
9 MPLAB Harmony Help
hh
IPV6_SEGMENT_TYPE enumeration 5-3743
IPV6_SNMP_TRAP_INFO structure 5-3848
IPV6_TASK_PROCESS_RATE macro 5-3721
IPV6_TLV_HBHO_PAYLOAD_JUMBOGRAM macro 5-3737
IPV6_TLV_HBHO_ROUTER_ALERT macro 5-3737
IPV6_TLV_OPTION_TYPE union 5-3744
IPV6_TLV_PAD_1 macro 5-3737
IPV6_TLV_PAD_N macro 5-3737
IPV6_TLV_UNREC_OPT_DISCARD_PP macro 5-3737
IPV6_TLV_UNREC_OPT_DISCARD_PP_NOT_MC macro
5-3738
IPV6_TLV_UNREC_OPT_DISCARD_SILENT macro 5-3738
IPV6_TLV_UNREC_OPT_SKIP_OPTION macro 5-3738
IPV6_ULA_FLAGS enumeration 5-3744
IPV6_ULA_NTP_ACCESS_TMO macro 5-3722
IPV6_ULA_NTP_VALID_WINDOW macro 5-3722
IPV6_ULA_RESULT enumeration 5-3745
Isochronous Transfers 5-571
IsPaletteEnabled function 5-875
ISR Implementation 7-4229
K
KEYMEMBER structure 5-936
KHAKI macro 5-1046
L
LAYER_ACTIONS enumeration 5-937
LAYER_REGISTERS structure 5-332
LAYER_TYPE enumeration 5-294
lcc_demo 3-85
LCC_TASK enumeration 5-307
LED Control Functions 7-4238
LibQ Fixed-Point Math Library 5-1275
libq.h 5-1307
Library Architecture 5-2428, 5-2690, 5-2800, 5-3978, 5-4061,
5-4101, 5-4132
Library Configuration 5-4022, 5-4065, 5-4104, 5-4134
Library Initialization 5-4065, 5-4134
Library Interface 5-204, 5-237, 5-262, 5-291, 5-301, 5-311,
5-326, 5-335, 5-352, 5-377, 5-400, 5-428, 5-482, 5-519, 5-574,
5-609, 5-702, 5-1124, 5-1130, 5-1171, 5-1278, 5-1325, 5-1381,
5-1480, 5-1526, 5-1567, 5-1672, 5-1748, 5-1866, 5-1922,
5-2089, 5-2175, 5-2206, 5-2257, 5-2294, 5-2337, 5-2434,
5-2488, 5-2601, 5-2666, 5-2690, 5-2712, 5-2766, 5-2824,
5-2903, 5-3022, 5-3101, 5-3182, 5-3323, 5-3332, 5-3353,
5-3368, 5-3397, 5-3426, 5-3444, 5-3474, 5-3517, 5-3532,
5-3572, 5-3580, 5-3601, 5-3618, 5-3630, 5-3640, 5-3649,
5-3658, 5-3665, 5-3692, 5-3700, 5-3712, 5-3723, 5-3753,
5-3773, 5-3797, 5-3804, 5-3808, 5-3815, 5-3832, 5-3863,
5-3875, 5-3888, 5-3916, 5-3921, 5-3935, 5-3958, 5-3985,
5-4023, 5-4075, 5-4120, 5-4141, 5-4173, 5-4180, 5-4200,
7-4238
Library Overview 5-194, 5-230, 5-257, 5-290, 5-300, 5-310,
5-321, 5-334, 5-344, 5-369, 5-399, 5-420, 5-459, 5-514, 5-553,
5-607, 5-696, 5-1112, 5-1129, 5-1168, 5-1276, 5-1314, 5-1473,
5-1566, 5-2598, 5-3014, 5-3173, 5-3322, 5-3349, 5-3365,
5-3422, 5-3442, 5-3470, 5-3506, 5-3531, 5-3571, 5-3576,
5-3600, 5-3616, 5-3627, 5-3638, 5-3647, 5-3656, 5-3661,
5-3691, 5-3699, 5-3710, 5-3719, 5-3749, 5-3772, 5-3796,
5-3801, 5-3810, 5-3823, 5-3859, 5-3869, 5-3882, 5-3914,
5-3919, 5-3932, 5-3956, 5-4007, 5-4101, 7-4231, 7-4233,
7-4235, 7-4237
Library Usage Model 5-1366, 5-1670, 5-1736, 5-2088, 5-2204,
5-2254, 5-2333, 5-2480, 5-2665, 5-2706, 5-2895, 5-3088
LIGHTBLUE macro 5-1046
LIGHTCYAN macro 5-1047
LIGHTGRAY macro 5-1047
LIGHTGREEN macro 5-1047
LIGHTMAGENTA macro 5-1047
LIGHTORANGE macro 5-1047
LIGHTRED macro 5-1047
LIGHTYELLOW macro 5-1048
Link Local (Zeroconf) 5-3956
listen function 5-3605
LOCAL_TCP_PORT_END_NUMBER macro 5-3885
LOCAL_TCP_PORT_START_NUMBER macro 5-3885
Low-Cost Controllerless (LCC) Graphics Driver Library 5-299
M
MAC TCP/IP Stack Library 5-3747
MAGENTA macro 5-1048
Main Program Changes 5-684, 5-3555
MAIN_RETURN macro 5-3341
MAIN_RETURN_CODE macro 5-3342
MAIN_RETURN_CODES enumeration 5-3334
Manager TCP/IP Stack Library 5-3770
9 MPLAB Harmony Help
ii
Managing Slave Addresses 5-2082
Master Descriptor Table 5-4012
Master Mode 5-2819
Math Library Help 5-1167
matrix32 structure 5-1265
MAX_ANYCAST_DELAY_TIME macro 5-3802
MAX_BSD_CLIENT_CONNECTIONS macro 5-3601
MAX_BSD_SERVER_CONNECTIONS macro 5-3601
MAX_MULTICAST_SOLICIT macro 5-3802
MAX_NEIGHBOR_ADVERTISEMENT macro 5-3802
MAX_NONBUFFERED_BYTE_COUNT macro 5-393
MAX_RTR_SOLICITATION_DELAY macro 5-3802
MAX_RTR_SOLICITATIONS macro 5-3803
MAX_SMTP_CONNECTIONS macro 5-3814
MAX_TELNET_CONNECTIONS macro 5-3915
MAX_UNICAST_SOLICIT macro 5-3803
MAX16 macro 5-1267
MAX32 macro 5-1267
MC_CRYPTO_API_H macro 5-1164
MCHP_BITMAP_NORMAL macro 5-1048
MCHP_BITMAP_PALETTE_STR macro 5-1048
mDNS 5-3957
MDNSD_ERR_CODE enumeration 5-3961
Media Driver Registration 5-4173
Media Independent Interface (MII) 5-1910
Memory Access Control 5-1524
Memory Operation 5-1322
Messaging Functionality 5-700
Messaging System Service Library 5-3438
Micrium uC_OS_III with Graphics 3-117
Migration Guide 5-3386
MIN16 macro 5-1267
MIN32 macro 5-1267
Miscellaneous 5-3473, 5-3513
Miscellaneous Config 5-480
Miscellaneous Configuration 5-428
Miscellaneous Functions 5-2256
Mode Configuration 5-1557
Module Events 5-1563
More Information 1-20
Mounting a Volume 5-3392
MPFS2 Command Line Options 5-3544
MPFS2 Utility 5-3542
MPLAB Harmony Configurator 2-40
MPLAB Harmony Configurator Help 2-39
MPLAB Harmony Graphics Library Access Changes 5-682
MPLAB Harmony Graphics Library API Changes 5-682
MPLAB Harmony Graphics Library BSP Configuration 5-685
MPLAB Harmony Graphics Library Configuration 5-685
MPLAB Harmony Graphics Library Configuration Changes
5-685
MPLAB Harmony Graphics Library Design 5-682
MPLAB Harmony Graphics Library File Name Compliance 5-686
MPLAB Harmony Graphics Library Function Name Compliance
5-687
MPLAB Harmony Graphics Library Initialization Changes 5-684
MPLAB Harmony Graphics Library Key Features 5-681
MPLAB Harmony Graphics Library Structure 5-681
MPLAB Harmony Graphics Library Utilities 5-685
MPLAB Harmony TCP/IP Stack Access Changes 5-3556
MPLAB Harmony TCP/IP Stack API Changes 5-3548
MPLAB Harmony TCP/IP Stack Configuration 5-3553
MPLAB Harmony TCP/IP Stack Configuration Changes 5-3553
MPLAB Harmony TCP/IP Stack Design 5-3548
MPLAB Harmony TCP/IP Stack Function Name Compliance
5-3558
MPLAB Harmony TCP/IP Stack Heap Configuration 5-3553
MPLAB Harmony TCP/IP Stack Initialization Changes 5-3556
MPLAB Harmony TCP/IP Stack Key Features 5-3546
MPLAB Harmony TCP/IP Stack SSL/RSA Usage 5-3557
MPLAB Harmony TCP/IP Stack Storage Changes 5-3552
MPLAB Harmony TCP/IP Stack Structure 5-3547
MPLAB Harmony TCP/IP Stack Utilities 5-3557
MPLAB Harmony vs. the Unified TCP/IP Stack 5-257
MPLAB Harmony vs. Unified Stack Functions 5-230
MRF24W Wi-Fi Driver Library 5-600
MSD Function Driver Registration 5-4172
msd_basic 3-164, 3-169
mul16 function 5-1263
9 MPLAB Harmony Help
jj
mul16r function 5-1263
mul32 function 5-1263
Multimedia Expansion Board (MEB) 3-96
Multimedia Expansion Board II (MEB II) 3-82, 3-96, 3-107,
3-140, 3-175
Mutex Operation 5-1318
MY_DEFAULT_SNMP_IF macro 5-3826
N
NBNS TCP/IP Stack Library 5-3794
nbns.h 5-3797
nbns_config.h 5-3797
NBNS_MODULE_CONFIG structure 5-3797
NBNS_PORT macro 5-3796
NDP TCP/IP Stack Library 5-3798
ndp.h 5-3805
ndp_config.h 5-3805
NDP_TASK_TIMER_RATE macro 5-3803
NDP_VALID_LIFETIME_TWO_HOURS macro 5-3803
New MPLAB Harmony Graphics Library API Functions 5-684
New MPLAB Harmony TCP/IP Stack API Functions 5-3555
NMI Events Functions 5-2699
nmv_mpfs_single_disk 3-73
Non-Volatile Memory (NVM) Driver Library 5-342
NOTIFY_COMMUNITY_LEN macro 5-3827
NTP_DEFAULT_CONNECTION_TYPE macro 5-3860
NTP_DEFAULT_IF macro 5-3861
NTP_EPOCH macro 5-3861
NTP_FAST_QUERY_INTERVAL macro 5-3861
NTP_MAX_RETRIES macro 5-3861
NTP_MAX_STRATUM macro 5-3861
NTP_QUERY_INTERVAL macro 5-3861
NTP_REPLY_TIMEOUT macro 5-3862
NTP_SERVER macro 5-3862
NTP_SERVER_PORT macro 5-3862
NTP_TIME_STAMP_TMO macro 5-3862
NTP_VERSION macro 5-3862
NUM_ALPHA_LEVELS macro 5-294
NVM Driver Demonstration 3-102
NVM Peripheral Library 5-2252
nvm_fat_single_disk 3-66
nvm_sdcard_fat_mpfs_multi_disk 3-75
nvm_sdcard_fat_multi_disk 3-71
O
Object Initialization 5-4171
object_demo 3-88
Objects Functionality 5-697
OC_16BIT_TIMERS enumeration 5-2312
OC_BUFFER_SIZE enumeration 5-2312
OC_CLOCK_RESOLUTION enumeration 5-2312
OC_COMPARE_MODES enumeration 5-2313
OC_FAULT_MODES enumeration 5-2314
OC_FAULT_OUT enumeration 5-2314
OC_FAULT_TRISTATE enumeration 5-2315
OC_FAULTS enumeration 5-2315
OC_MODULE_ID enumeration 5-2315
OC_SYNC_MODES enumeration 5-2316
OC_SYNC_SOURCES enumeration 5-2316
OC_TRIGGER_STATUS_MODES enumeration 5-2318
OID_MAX_LEN macro 5-3827
One Shot Callback 5-3510
ONEP25 macro 5-1048
Opening a File 5-3393
Opening the Driver 5-556
Operating as a Master 5-2483
Operating as a Master Receiver 5-2070
Operating as a Master Transmitter 5-2065
Operating as a Slave 5-2484
Operating as a Slave Receiver 5-2062
Operating as a Slave Transmitter 5-2063
Operating System Abstraction Layer (OSAL) Library Help
5-1311
Operating/Addressing Mode Management 5-1739
Optional Interfaces 5-467
ORANGE macro 5-1048
OSAL Operation 5-1322
osal.c 5-1325
9 MPLAB Harmony Help
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osal.h 5-1358
OSAL_CRIT_Enter function 5-1349
OSAL_CRIT_Leave function 5-1349
OSAL_CRIT_TYPE enumeration 5-1350
OSAL_CRIT_TYPE_HIGH enumeration member 5-1350
OSAL_CRIT_TYPE_LOW enumeration member 5-1350
OSAL_ERROR_CALLBACK_DEFAULT enumeration member
5-1352
OSAL_ERROR_CALLBACK_ERROR enumeration member
5-1352
OSAL_ERROR_CALLBACK_OUT_OF_MEMORY enumeration
member 5-1352
OSAL_ERROR_CALLBACK_STACK_OVERFLOW
enumeration member 5-1352
OSAL_ERROR_CALLBACK_TYPE enumeration 5-1352
OSAL_ErrorCallback function 5-1352
OSAL_Free function 5-1353
OSAL_Initialize function 5-1355
OSAL_ISR_Enter function 5-1351
OSAL_ISR_Exit function 5-1351
OSAL_Malloc function 5-1354
OSAL_MUTEX_Create function 5-1338
OSAL_MUTEX_DECLARE macro 5-1340
OSAL_MUTEX_Delete function 5-1338
OSAL_MUTEX_HANDLE_TYPE macro 5-1356
OSAL_MUTEX_Lock function 5-1339
OSAL_MUTEX_Unlock function 5-1340
OSAL_Name function 5-1355
OSAL_QUEUE_Add function 5-1341
OSAL_QUEUE_AddHead function 5-1342
OSAL_QUEUE_AddHeadISR function 5-1342
OSAL_QUEUE_AddISR function 5-1343
OSAL_QUEUE_Create function 5-1344
OSAL_QUEUE_DECLARE macro 5-1341
OSAL_QUEUE_Delete function 5-1345
OSAL_QUEUE_HANDLE_TYPE macro 5-1356
OSAL_QUEUE_Peek function 5-1345
OSAL_QUEUE_PeekISR function 5-1346
OSAL_QUEUE_Remove function 5-1347
OSAL_QUEUE_RemoveISR function 5-1348
OSAL_RESULT enumeration 5-1357
OSAL_RESULT_FALSE enumeration member 5-1357
OSAL_RESULT_NOT_IMPLEMENTED enumeration member
5-1357
OSAL_RESULT_TRUE enumeration member 5-1357
OSAL_SEM_Create function 5-1333
OSAL_SEM_DECLARE macro 5-1337
OSAL_SEM_Delete function 5-1334
OSAL_SEM_GetCount function 5-1334
OSAL_SEM_HANDLE_TYPE macro 5-1356
OSAL_SEM_Pend function 5-1335
OSAL_SEM_Post function 5-1336
OSAL_SEM_PostISR function 5-1336
OSAL_SEM_TYPE enumeration 5-1357
OSAL_SEM_TYPE_BINARY enumeration member 5-1357
OSAL_SEM_TYPE_COUNTING enumeration member 5-1357
OSAL_Start function 5-1356
OSAL_THREAD_Create function 5-1327
OSAL_THREAD_CreateDaemon function 5-1328
OSAL_THREAD_FUNCTION type 5-1327
OSAL_THREAD_HANDLE_TYPE macro 5-1357
OSAL_THREAD_PriorityGet function 5-1329
OSAL_THREAD_PrioritySet function 5-1330
OSAL_THREAD_Resume function 5-1330
OSAL_THREAD_ResumeAll function 5-1331
OSAL_THREAD_Sleep function 5-1331
OSAL_THREAD_Suspend function 5-1332
OSAL_THREAD_SuspendAll function 5-1333
OSAL_USE_NONE macro 5-1357
OSAL_WAIT_FOREVER macro 5-1357
OSC_AUX_CLOCK_SOURCE enumeration 5-2394
OSC_AUX_MODE enumeration 5-2394
OSC_AUXPLL_IN_DIV enumeration 5-2394
OSC_AUXPLL_MULTIPLIER enumeration 5-2395
OSC_AUXPLL_OUT_DIV enumeration 5-2395
OSC_DOZE_RATIO enumeration 5-2396
OSC_FRC_DIV enumeration 5-2396
OSC_FRC_TUNE enumeration 5-2397
OSC_GFX_CLOCK enumeration 5-2398
OSC_LFSR_TYPE enumeration 5-2398
OSC_MODULE_ID enumeration 5-2399
9 MPLAB Harmony Help
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OSC_OPERATION_ON_WAIT enumeration 5-2399
OSC_PB_CLOCK_DIV_TYPE macro 5-2393
OSC_PERIPHERAL_BUS enumeration 5-2399
OSC_PLL_SELECT enumeration 5-2400
OSC_PLLAUX_CLOCK_SOURCE enumeration 5-2400
OSC_REF_BASECLOCK enumeration 5-2401
OSC_REF_DIV enumeration 5-2401
OSC_REF_DIVISOR_TYPE macro 5-2393
OSC_REFERENCE enumeration 5-2402
OSC_REFERENCE_MAX_DIV macro 5-2393
OSC_SYS_CLOCK_DIV enumeration 5-2403
OSC_SYS_TYPE enumeration 5-2403
OSC_SYSPLL_FREQ_RANGE enumeration 5-2404
OSC_SYSPLL_IN_CLK_SOURCE enumeration 5-2404
OSC_SYSPLL_IN_DIV enumeration 5-2405
OSC_SYSPLL_MULTIPLIER_TYPE macro 5-2393
OSC_SYSPLL_OUT_DIV enumeration 5-2405
OSC_TUNING_MODE enumeration 5-2406
OSC_TUNING_SEQUENCERS enumeration 5-2406
OSC_USBCLOCK_SOURCE enumeration 5-2407
Oscillator Peripheral Library 5-2330
Oscillator Selection and Switching 5-2333
Oscillator Tuning 5-3351
Other Features 5-2086, 5-2487, 5-2822, 5-3020, 5-3099
Other Functionality 5-608, 5-1316, 5-2711
Other Functions 7-4240
Others 5-574, 5-609, 5-1324, 5-3366
OTM2201A Graphics Controller Driver Library 5-309
OTM2201A_TASK enumeration 5-318
Output Compare Peripheral Library 5-2287
Overview 3-65
P
PA6_IO macro 5-673
PA6_TRISTATE macro 5-674
PAGE_TYPE enumeration 5-294
PALETTE_ENTRY union 5-938
PALETTE_EXTERNAL type 5-938
PALETTE_FLASH structure 5-938
PALETTE_HEADER structure 5-939
PaletteInit function 5-876
Parallel Master Port (PMP) Driver Library 5-367
PARM_EQUAL_FILTER structure 5-1265
PARM_EQUAL_FILTER_16 structure 5-1266
PARM_EQUAL_FILTER_32 structure 5-1266
PARM_FILTER_GAIN structure 5-1267
PCACHE_MODULE_ID enumeration 5-2463
Percentage2Alpha function 5-291
Period Modification 5-464
Periodic Callback 5-3509
Peripheral Libraries 4-182
Peripheral Library Example Applications 3-98
Peripheral Library Help 5-1361
Peripheral Pin Select 5-3473
PERU macro 5-1049
PGV Error Handling 5-2765
PHY_NEG_DONE_TMO macro 5-261
PHY_NEG_INIT_TMO macro 5-262
PHY_RESET_CLR_TMO macro 5-262
PIC32 Ethernet Starter Kit 3-136
PIC32 USB Digital Audio Accessory Board 3-173
PIC32 USB Starter Kit II 3-77, 3-91, 3-104, 3-118, 3-170
PIC32 USB Starter Kit II BSP Library 7-4232
pic32_ethernet_starter_kit 3-131
PIC32MX USB Audio BSP Library 7-4234
PIC32MX795F512 Plug-In-Module (PIM) 3-79
PIC32MX795F512L Plug-in Module (PIM) 3-105, 3-125, 3-144
PIC32MX795F512L Plug-In-Module (PIM) 3-96, 3-173
PIC32MZ Embedded Connectivity (EC) Starter Kit 3-80, 3-92,
3-106, 3-119, 3-137, 3-173
PIC32MZ Embedded Connectivity (EC) Starter Kit BSP Library
7-4236
PICtail Daughter Board for SD and MMC 3-80
PICtail Plus LCC Daughter Board 3-95
PICtail Plus S1D13517 Daughter Board 3-95
PICtail Plus SSD1926 Daughter Board 3-95
Pin Control 5-3470
PIO Mode 5-2900
PIP_BUFFER macro 5-307
9 MPLAB Harmony Help
mm
Pipe Close 5-560
Pipe Setup 5-558
Pipe Stall 5-561
Pipe Status 5-559
Pipe Transfer Queue 5-560
plib_adc.h 5-1467
PLIB_ADC_AsynchronousDedicatedSamplingDisable function
5-1417
PLIB_ADC_AsynchronousDedicatedSamplingEnable function
5-1417
PLIB_ADC_CalibrationDisable function 5-1389
PLIB_ADC_CalibrationEnable function 5-1388
PLIB_ADC_ChannelGroupSelect function 5-1393
PLIB_ADC_ConversionClockGet function 5-1402
PLIB_ADC_ConversionClockSet function 5-1402
PLIB_ADC_ConversionClockSourceSelect function 5-1403
PLIB_ADC_ConversionHasCompleted function 5-1400
PLIB_ADC_ConversionOrderSelect function 5-1404
PLIB_ADC_ConversionStart function 5-1399
PLIB_ADC_ConversionStopSequenceDisable function 5-1401
PLIB_ADC_ConversionStopSequenceEnable function 5-1401
PLIB_ADC_ConversionTriggerGroupSelect function 5-1404
PLIB_ADC_ConversionTriggerSourceSelect function 5-1400
PLIB_ADC_Disable function 5-1386
PLIB_ADC_DMAAddressIncrementSelect function 5-1405
PLIB_ADC_DMABufferModeSelect function 5-1405
PLIB_ADC_DMADisable function 5-1406
PLIB_ADC_DMAEnable function 5-1406
PLIB_ADC_DMAInputBufferSelect function 5-1407
PLIB_ADC_Enable function 5-1385
PLIB_ADC_ExistsAsynchronousDedicatedSampling function
5-1439
PLIB_ADC_ExistsCalibrationControl function 5-1439
PLIB_ADC_ExistsChannelGroup function 5-1440
PLIB_ADC_ExistsConversionClock function 5-1440
PLIB_ADC_ExistsConversionClockSource function 5-1441
PLIB_ADC_ExistsConversionControl function 5-1441
PLIB_ADC_ExistsConversionOrder function 5-1442
PLIB_ADC_ExistsConversionStatus function 5-1442
PLIB_ADC_ExistsConversionStopSequenceControl function
5-1443
PLIB_ADC_ExistsConversionTriggerGroup function 5-1443
PLIB_ADC_ExistsConversionTriggerSource function 5-1444
PLIB_ADC_ExistsDMAAddressIncrement function 5-1444
PLIB_ADC_ExistsDMABufferMode function 5-1445
PLIB_ADC_ExistsDMABuffersPerAnalogInput function 5-1445
PLIB_ADC_ExistsDMAControl function 5-1446
PLIB_ADC_ExistsEnableControl function 5-1446
PLIB_ADC_ExistsGlobalSoftwareTrigger function 5-1447
PLIB_ADC_ExistsInputSelect function 5-1447
PLIB_ADC_ExistsInternalReferenceChannelControl function
5-1448
PLIB_ADC_ExistsISRJumpTableBaseAddress function 5-1448
PLIB_ADC_ExistsMuxChannel0NegativeInput function 5-1449
PLIB_ADC_ExistsMuxChannel0PositiveInput function 5-1449
PLIB_ADC_ExistsMuxChannel123NegativeInput function
5-1450
PLIB_ADC_ExistsMuxChannel123PositiveInput function 5-1450
PLIB_ADC_ExistsMuxInputScanControl function 5-1451
PLIB_ADC_ExistsMuxInputScanSelect function 5-1451
PLIB_ADC_ExistsPairConversionControl function 5-1452
PLIB_ADC_ExistsPairInterruptOnConversion function 5-1453
PLIB_ADC_ExistsPairInterruptRequest function 5-1453
PLIB_ADC_ExistsPairSampleStatus function 5-1454
PLIB_ADC_ExistsPairTriggerSource function 5-1454
PLIB_ADC_ExistsResultBufferFillStatus function 5-1455
PLIB_ADC_ExistsResultBufferMode function 5-1455
PLIB_ADC_ExistsResultFormat function 5-1456
PLIB_ADC_ExistsResultGet function 5-1456
PLIB_ADC_ExistsResultGetByIndex function 5-1457
PLIB_ADC_ExistsResultSign function 5-1457
PLIB_ADC_ExistsResultSize function 5-1458
PLIB_ADC_ExistsSampleResolution function 5-1458
PLIB_ADC_ExistsSamplesPerInterruptSelect function 5-1459
PLIB_ADC_ExistsSamplingAcquisitionTime function 5-1459
PLIB_ADC_ExistsSamplingAutoStart function 5-1460
PLIB_ADC_ExistsSamplingControl function 5-1460
PLIB_ADC_ExistsSamplingModeControl function 5-1461
PLIB_ADC_ExistsSamplingStatus function 5-1461
PLIB_ADC_ExistsStopInIdleControl function 5-1462
PLIB_ADC_ExistsVoltageReference function 5-1462
9 MPLAB Harmony Help
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PLIB_ADC_GlobalSoftwareTriggerSet function 5-1418
PLIB_ADC_InputScanMaskAdd function 5-1390
PLIB_ADC_InputScanMaskRemove function 5-1391
PLIB_ADC_InputSelectNegative function 5-1390
PLIB_ADC_InputSelectPositive function 5-1389
PLIB_ADC_InternalReferenceChannelDisable function 5-1392
PLIB_ADC_InternalReferenceChannelEnable function 5-1392
PLIB_ADC_IsrJumpTableBaseAddressGet function 5-1419
PLIB_ADC_IsrJumpTableBaseAddressSet function 5-1419
PLIB_ADC_MuxAInputScanDisable function 5-1463
PLIB_ADC_MuxAInputScanEnable function 5-1463
PLIB_ADC_MuxChannel0InputNegativeSelect function 5-1464
PLIB_ADC_MuxChannel0InputPositiveSelect function 5-1465
PLIB_ADC_MuxChannel123InputNegativeSelect function
5-1465
PLIB_ADC_MuxChannel123InputPositiveSelect function 5-1466
PLIB_ADC_PairConversionIsPending function 5-1408
PLIB_ADC_PairConversionStart function 5-1408
PLIB_ADC_PairInterruptAfterFirstConversion function 5-1409
PLIB_ADC_PairInterruptAfterSecondConversion function 5-1409
PLIB_ADC_PairInterruptRequestDisable function 5-1410
PLIB_ADC_PairInterruptRequestEnable function 5-1410
PLIB_ADC_PairSampleIsAvailable function 5-1411
PLIB_ADC_PairSampleStatusClear function 5-1412
PLIB_ADC_PairTriggerSourceSelect function 5-1412
PLIB_ADC_ResultBufferModeSelect function 5-1413
PLIB_ADC_ResultBufferStatusGet function 5-1413
PLIB_ADC_ResultFormatSelect function 5-1414
PLIB_ADC_ResultGet function 5-1415
PLIB_ADC_ResultGetByIndex function 5-1415
PLIB_ADC_ResultSignGet function 5-1416
PLIB_ADC_ResultSizeSelect function 5-1416
PLIB_ADC_SampleAcqusitionTimeSet function 5-1394
PLIB_ADC_SampleAutoStartDisable function 5-1394
PLIB_ADC_SampleAutoStartEnable function 5-1395
PLIB_ADC_SampleMaxGet function 5-1395
PLIB_ADC_SampleMinGet function 5-1396
PLIB_ADC_SamplesPerInterruptSelect function 5-1396
PLIB_ADC_SamplingIsActive function 5-1397
PLIB_ADC_SamplingModeSelect function 5-1397
PLIB_ADC_SamplingStart function 5-1398
PLIB_ADC_SamplingStop function 5-1399
PLIB_ADC_StopInIdleDisable function 5-1386
PLIB_ADC_StopInIdleEnable function 5-1387
PLIB_ADC_VoltageReferenceSelect function 5-1387
plib_adcp.h 5-1518
PLIB_ADCP_AlternateInputSelect function 5-1489
PLIB_ADCP_CalibrationStart function 5-1484
PLIB_ADCP_ChannelScanConfigure function 5-1492
PLIB_ADCP_Class12TriggerConfigure function 5-1495
PLIB_ADCP_Configure function 5-1482
PLIB_ADCP_DefaultInputSelect function 5-1490
PLIB_ADCP_DigCmpAIdGet function 5-1500
PLIB_ADCP_DigCmpConfig function 5-1500
PLIB_ADCP_DigCmpDisable function 5-1499
PLIB_ADCP_DigCmpEnable function 5-1499
PLIB_ADCP_Disable function 5-1483
PLIB_ADCP_Enable function 5-1483
PLIB_ADCP_ExistsCalibration function 5-1486
PLIB_ADCP_ExistsChannelScan function 5-1493
PLIB_ADCP_ExistsConfiguration function 5-1488
PLIB_ADCP_ExistsConversionResults function 5-1498
PLIB_ADCP_ExistsDigCmp function 5-1502
PLIB_ADCP_ExistsEnableControl function 5-1486
PLIB_ADCP_ExistsInputSelect function 5-1491
PLIB_ADCP_ExistsLowPowerControl function 5-1487
PLIB_ADCP_ExistsModeSelect function 5-1491
PLIB_ADCP_ExistsOsampDigFilter function 5-1505
PLIB_ADCP_ExistsReadyStatus function 5-1489
PLIB_ADCP_ExistsTriggering function 5-1495
PLIB_ADCP_GlobalSoftwareTrigger function 5-1494
PLIB_ADCP_IndividualTrigger function 5-1494
PLIB_ADCP_LowPowerStateEnter function 5-1484
PLIB_ADCP_LowPowerStateExit function 5-1485
PLIB_ADCP_LowPowerStateGet function 5-1485
PLIB_ADCP_ModuleIsReady function 5-1488
PLIB_ADCP_OsampDigFilterConfig function 5-1505
PLIB_ADCP_OsampDigFilterDataGet function 5-1504
PLIB_ADCP_OsampDigFilterDataRdy function 5-1503
9 MPLAB Harmony Help
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PLIB_ADCP_OsampDigFilterDisable function 5-1503
PLIB_ADCP_OsampDigFilterEnable function 5-1502
PLIB_ADCP_ResultGet function 5-1497
PLIB_ADCP_ResultReady function 5-1496
PLIB_ADCP_ResultReadyGrpIntConfigure function 5-1497
PLIB_ADCP_SHModeSelect function 5-1492
plib_bmx.h 5-1552
PLIB_BMX_ARB_MODE enumeration 5-1543
PLIB_BMX_ArbitrationModeGet function 5-1535
PLIB_BMX_ArbitrationModeSet function 5-1535
PLIB_BMX_BusExceptionDataDisable function 5-1528
PLIB_BMX_BusExceptionDataEnable function 5-1529
PLIB_BMX_BusExceptionDMADisable function 5-1529
PLIB_BMX_BusExceptionDMAEnable function 5-1530
PLIB_BMX_BusExceptionICDDisable function 5-1530
PLIB_BMX_BusExceptionICDEnable function 5-1531
PLIB_BMX_BusExceptionInstructionDisable function 5-1531
PLIB_BMX_BusExceptionInstructionEnable function 5-1532
PLIB_BMX_BusExceptionIXIDisable function 5-1532
PLIB_BMX_BusExceptionIXIEnable function 5-1533
PLIB_BMX_DATA_RAM_WAIT_STATES enumeration 5-1543
PLIB_BMX_DataRAMKernelProgramOffsetGet function 5-1536
PLIB_BMX_DataRAMPartitionSet function 5-1536
PLIB_BMX_DataRAMSizeGet function 5-1537
PLIB_BMX_DataRAMUserDataOffsetGet function 5-1538
PLIB_BMX_DataRAMUserProgramOffsetGet function 5-1538
PLIB_BMX_DataRamWaitStateGet function 5-1539
PLIB_BMX_DataRamWaitStateSet function 5-1540
PLIB_BMX_DRM_BLOCK_SIZE macro 5-1544
PLIB_BMX_EXCEPTION_SRC enumeration 5-1544
PLIB_BMX_ExistsArbitrationMode function 5-1545
PLIB_BMX_ExistsBusExceptionData function 5-1545
PLIB_BMX_ExistsBusExceptionDMA function 5-1546
PLIB_BMX_ExistsBusExceptionICD function 5-1546
PLIB_BMX_ExistsBusExceptionInstruction function 5-1547
PLIB_BMX_ExistsBusExceptionIXI function 5-1547
PLIB_BMX_ExistsDataRAMPartition function 5-1548
PLIB_BMX_ExistsDataRAMSize function 5-1548
PLIB_BMX_ExistsDataRamWaitState function 5-1549
PLIB_BMX_ExistsProgramFlashBootSize function 5-1549
PLIB_BMX_ExistsProgramFlashMemoryCacheDma function
5-1550
PLIB_BMX_ExistsProgramFlashMemorySize function 5-1550
PLIB_BMX_ExistsProgramFlashPartition function 5-1551
PLIB_BMX_PFM_BLOCK_SIZE macro 5-1544
PLIB_BMX_ProgramFlashBootSizeGet function 5-1540
PLIB_BMX_ProgramFlashMemoryCacheDmaDisable function
5-1533
PLIB_BMX_ProgramFlashMemoryCacheDmaEnable function
5-1534
PLIB_BMX_ProgramFlashMemorySizeGet function 5-1541
PLIB_BMX_ProgramFlashPartitionGet function 5-1541
PLIB_BMX_ProgramFlashPartitionSet function 5-1542
plib_can.h 5-1662
PLIB_CAN_AllChannelEventsGet function 5-1595
PLIB_CAN_AllChannelOverflowStatusGet function 5-1596
PLIB_CAN_BusActivityWakeupDisable function 5-1572
PLIB_CAN_BusActivityWakeupEnable function 5-1572
PLIB_CAN_BusLine3TimesSamplingDisable function 5-1583
PLIB_CAN_BusLine3TimesSamplingEnable function 5-1584
PLIB_CAN_ChannelEventClear function 5-1597
PLIB_CAN_ChannelEventDisable function 5-1592
PLIB_CAN_ChannelEventEnable function 5-1598
PLIB_CAN_ChannelEventGet function 5-1599
PLIB_CAN_ChannelForReceiveSet function 5-1589
PLIB_CAN_ChannelForTransmitSet function 5-1590
PLIB_CAN_ChannelReset function 5-1590
PLIB_CAN_ChannelResetIsComplete function 5-1579
PLIB_CAN_ChannelUpdate function 5-1591
PLIB_CAN_DeviceNetConfigure function 5-1579
PLIB_CAN_Disable function 5-1573
PLIB_CAN_Enable function 5-1574
PLIB_CAN_ErrorStateGet function 5-1617
PLIB_CAN_ExistsActiveStatus function 5-1636
PLIB_CAN_ExistsAllChannelEvents function 5-1637
PLIB_CAN_ExistsAllChannelOverflow function 5-1637
PLIB_CAN_ExistsBusActivityWakeup function 5-1638
PLIB_CAN_ExistsBusLine3TimesSampling function 5-1638
PLIB_CAN_ExistsChannelEvent function 5-1639
9 MPLAB Harmony Help
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PLIB_CAN_ExistsChannelEventEnable function 5-1639
PLIB_CAN_ExistsChannelForReceiveSet function 5-1640
PLIB_CAN_ExistsChannelForTransmitSet function 5-1640
PLIB_CAN_ExistsChannelReset function 5-1641
PLIB_CAN_ExistsChannelUpdate function 5-1641
PLIB_CAN_ExistsDeviceNet function 5-1642
PLIB_CAN_ExistsEnableControl function 5-1642
PLIB_CAN_ExistsErrorState function 5-1643
PLIB_CAN_ExistsFilterConfigure function 5-1643
PLIB_CAN_ExistsFilterEnable function 5-1644
PLIB_CAN_ExistsFilterMaskConfigure function 5-1644
PLIB_CAN_ExistsFilterToChannelLink function 5-1645
PLIB_CAN_ExistsFunctionalMode function 5-1645
PLIB_CAN_ExistsLatestFilterMatchGet function 5-1646
PLIB_CAN_ExistsMemoryBufferAssign function 5-1646
PLIB_CAN_ExistsMessageIsReceived function 5-1647
PLIB_CAN_ExistsModuleEventClear function 5-1647
PLIB_CAN_ExistsModuleEventEnable function 5-1648
PLIB_CAN_ExistsModuleInfo function 5-1648
PLIB_CAN_ExistsOperationModeRead function 5-1649
PLIB_CAN_ExistsOperationModeWrite function 5-1649
PLIB_CAN_ExistsPendingEventsGet function 5-1650
PLIB_CAN_ExistsPendingTransmissionsAbort function 5-1650
PLIB_CAN_ExistsPhaseSegment1Length function 5-1651
PLIB_CAN_ExistsPhaseSegment2Length function 5-1651
PLIB_CAN_ExistsPhaseSegment2LengthFreelyProgrammable
function 5-1652
PLIB_CAN_ExistsPropagationTimeSegment function 5-1652
PLIB_CAN_ExistsReceiveBufferClear function 5-1653
PLIB_CAN_ExistsReceiveBufferIsEmpty function 5-1653
PLIB_CAN_ExistsReceivedMessageGet function 5-1654
PLIB_CAN_ExistsReceiveErrorCount function 5-1654
PLIB_CAN_ExistsReceiveModeSelect function 5-1655
PLIB_CAN_ExistsRemoteTransmitReq function 5-1655
PLIB_CAN_ExistsRxFIFOFourLeftNotify function 5-1656
PLIB_CAN_ExistsRxFIFOOneLeftNotify function 5-1656
PLIB_CAN_ExistsStopInIdle function 5-1657
PLIB_CAN_ExistsSyncJumpWidthSet function 5-1657
PLIB_CAN_ExistsTimeStampEnable function 5-1658
PLIB_CAN_ExistsTimeStampPrescalar function 5-1658
PLIB_CAN_ExistsTimeStampValue function 5-1659
PLIB_CAN_ExistsTransmissionIsAborted function 5-1660
PLIB_CAN_ExistsTransmitBufferGet function 5-1660
PLIB_CAN_ExistsTransmitChannelFlush function 5-1661
PLIB_CAN_ExistsTransmitChannelStatus function 5-1661
PLIB_CAN_ExistsTransmitErrorCountGet function 5-1662
PLIB_CAN_FilterConfigure function 5-1612
PLIB_CAN_FilterDisable function 5-1612
PLIB_CAN_FilterEnable function 5-1613
PLIB_CAN_FilterIsDisabled function 5-1614
PLIB_CAN_FilterMaskConfigure function 5-1614
PLIB_CAN_FilterToChannelLink function 5-1615
PLIB_CAN_FunctionalModeGet function 5-1580
PLIB_CAN_FunctionalModeSelect function 5-1583
PLIB_CAN_IsActive function 5-1574
PLIB_CAN_LatestFilterMatchGet function 5-1616
PLIB_CAN_MemoryBufferAssign function 5-1580
PLIB_CAN_MessageIsReceived function 5-1609
PLIB_CAN_ModuleEventClear function 5-1593
PLIB_CAN_ModuleEventDisable function 5-1593
PLIB_CAN_ModuleEventEnable function 5-1594
PLIB_CAN_ModuleEventGet function 5-1595
PLIB_CAN_OperationModeGet function 5-1575
PLIB_CAN_OperationModeSelect function 5-1576
PLIB_CAN_PendingEventsGet function 5-1600
PLIB_CAN_PendingTransmissionsAbort function 5-1601
PLIB_CAN_PhaseSegment1LengthSet function 5-1585
PLIB_CAN_PhaseSegment2LengthFreelyProgrammableDisable
function 5-1586
PLIB_CAN_PhaseSegment2LengthFreelyProgrammableEnable
function 5-1586
PLIB_CAN_PhaseSegment2LengthSet function 5-1587
PLIB_CAN_PropagationTimeSegmentSet function 5-1588
PLIB_CAN_ReceiveBufferClear function 5-1610
PLIB_CAN_ReceiveBufferIsEmpty function 5-1610
PLIB_CAN_ReceivedMessageGet function 5-1605
PLIB_CAN_ReceiveErrorCountGet function 5-1616
PLIB_CAN_ReceiveModeGet function 5-1608
PLIB_CAN_ReceiveModeSelect function 5-1608
9 MPLAB Harmony Help
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PLIB_CAN_RemoteTransmitReqIsReceived function 5-1611
PLIB_CAN_RxFIFOFourLeftNotify function 5-1607
PLIB_CAN_RxFIFOOneLeftNotify function 5-1607
PLIB_CAN_StopInIdleDisable function 5-1576
PLIB_CAN_StopInIdleEnable function 5-1577
PLIB_CAN_SyncJumpWidthSet function 5-1588
PLIB_CAN_TimeStampDisable function 5-1577
PLIB_CAN_TimeStampEnable function 5-1578
PLIB_CAN_TimeStampPrescalarSet function 5-1581
PLIB_CAN_TimeStampValueGet function 5-1582
PLIB_CAN_TimeStampValueSet function 5-1582
PLIB_CAN_TotalChannelsGet function 5-1618
PLIB_CAN_TotalFiltersGet function 5-1618
PLIB_CAN_TotalMasksGet function 5-1619
PLIB_CAN_TransmissionIsAborted function 5-1601
PLIB_CAN_TransmitBufferGet function 5-1602
PLIB_CAN_TransmitChannelFlush function 5-1603
PLIB_CAN_TransmitChannelStatusGet function 5-1604
PLIB_CAN_TransmitErrorCountGet function 5-1605
plib_cmp.h 5-1730
PLIB_CMP_AndGateAInputDisable function 5-1696
PLIB_CMP_AndGateAInputEnable function 5-1697
PLIB_CMP_AndGateBInputDisable function 5-1697
PLIB_CMP_AndGateBInputEnable function 5-1698
PLIB_CMP_AndGateCInputDisable function 5-1704
PLIB_CMP_AndGateCInputEnable function 5-1698
PLIB_CMP_AndGateInvertedAInputDisable function 5-1699
PLIB_CMP_AndGateInvertedAInputEnable function 5-1699
PLIB_CMP_AndGateInvertedBInputDisable function 5-1700
PLIB_CMP_AndGateInvertedBInputEnable function 5-1700
PLIB_CMP_AndGateInvertedCInputDisable function 5-1701
PLIB_CMP_AndGateInvertedCInputEnable function 5-1701
PLIB_CMP_Cmp1OutputHighSelect function 5-1690
PLIB_CMP_Cmp1OutputLowSelect function 5-1690
PLIB_CMP_Cmp2OutputHighSelect function 5-1691
PLIB_CMP_Cmp2OutputLowSelect function 5-1691
PLIB_CMP_CVREF_BandGapReferenceSourceSelect function
5-1676
PLIB_CMP_CVREF_Disable function 5-1689
PLIB_CMP_CVREF_Enable function 5-1676
PLIB_CMP_CVREF_Output2Disable function 5-1677
PLIB_CMP_CVREF_Output2Enable function 5-1677
PLIB_CMP_CVREF_OutputDisable function 5-1678
PLIB_CMP_CVREF_OutputEnable function 5-1678
PLIB_CMP_CVREF_ReferenceVoltageSelect function 5-1679
PLIB_CMP_CVREF_SourceNegativeInputSelect function
5-1679
PLIB_CMP_CVREF_SourceVoltageSelect function 5-1680
PLIB_CMP_CVREF_ValueGet function 5-1680
PLIB_CMP_CVREF_ValueSelect function 5-1681
PLIB_CMP_CVREF_WideRangeDisable function 5-1681
PLIB_CMP_CVREF_WideRangeEnable function 5-1682
PLIB_CMP_CVREF_WideRangeIsEnabled function 5-1682
PLIB_CMP_Disable function 5-1683
PLIB_CMP_Enable function 5-1683
PLIB_CMP_EventHasOccurred function 5-1684
PLIB_CMP_EventStatusClear function 5-1684
PLIB_CMP_ExistsCVREFBGRefVoltageRangeSelect function
5-1722
PLIB_CMP_ExistsCVREFEnableControl function 5-1723
PLIB_CMP_ExistsCVREFOutputEnableControl function 5-1723
PLIB_CMP_ExistsCVREFRefVoltageRangeSelect function
5-1724
PLIB_CMP_ExistsCVREFValueSelect function 5-1724
PLIB_CMP_ExistsCVREFVoltageRangeSelect function 5-1725
PLIB_CMP_ExistsCVREFWideRangeControl function 5-1725
PLIB_CMP_ExistsEnableControl function 5-1726
PLIB_CMP_ExistsInterruptEventSelect function 5-1727
PLIB_CMP_ExistsInvertingInputSelect function 5-1727
PLIB_CMP_ExistsInvertOutputControl function 5-1728
PLIB_CMP_ExistsNonInvertingInputSelect function 5-1728
PLIB_CMP_ExistsOutputEnableControl function 5-1729
PLIB_CMP_ExistsOutputLevelControl function 5-1729
PLIB_CMP_ExistsStopInIdle function 5-1730
PLIB_CMP_FilterClockDivideSelect function 5-1704
PLIB_CMP_FilterDisable function 5-1705
PLIB_CMP_FilterEnable function 5-1705
PLIB_CMP_FilterInputClockSelect function 5-1706
PLIB_CMP_HighLevelMaskSelect function 5-1715
PLIB_CMP_HysteresisDisable function 5-1692
9 MPLAB Harmony Help
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PLIB_CMP_HysteresisEnable function 5-1692
PLIB_CMP_InterruptEventSelect function 5-1685
PLIB_CMP_InvertedOutputSelect function 5-1686
PLIB_CMP_InvertingInputChannelSelect function 5-1686
PLIB_CMP_LowLevelMaskSelect function 5-1715
PLIB_CMP_NegativeAndGateOutputDisable function 5-1702
PLIB_CMP_NegativeAndGateOutputEnable function 5-1702
PLIB_CMP_NonInvertedOutputSelect function 5-1687
PLIB_CMP_NonInvertingInputChannelSelect function 5-1687
PLIB_CMP_OpAmpModeDisable function 5-1706
PLIB_CMP_OpAmpModeEnable function 5-1707
PLIB_CMP_OpAmpOutputDisable function 5-1707
PLIB_CMP_OpAmpOutputEnable function 5-1708
PLIB_CMP_OrGateAInputDisable function 5-1708
PLIB_CMP_OrGateAInputEnable function 5-1709
PLIB_CMP_OrGateBInputDisable function 5-1709
PLIB_CMP_OrGateBInputEnable function 5-1710
PLIB_CMP_OrGateCInputDisable function 5-1710
PLIB_CMP_OrGateCInputEnable function 5-1711
PLIB_CMP_OrGateInvertedAInputDisable function 5-1711
PLIB_CMP_OrGateInvertedAInputEnable function 5-1712
PLIB_CMP_OrGateInvertedBInputDisable function 5-1712
PLIB_CMP_OrGateInvertedBInputEnable function 5-1713
PLIB_CMP_OrGateInvertedCInputDisable function 5-1713
PLIB_CMP_OrGateInvertedCInputEnable function 5-1714
PLIB_CMP_OutputDisable function 5-1688
PLIB_CMP_OutputEnable function 5-1688
PLIB_CMP_OutputHighSelect function 5-1693
PLIB_CMP_OutputLowSelect function 5-1693
PLIB_CMP_OutputStatusGet function 5-1689
PLIB_CMP_OutputSynchronousWithTimer1Disable function
5-1694
PLIB_CMP_OutputSynchronousWithTimer1Enable function
5-1694
PLIB_CMP_PositiveAndGateOutputDisable function 5-1703
PLIB_CMP_PositiveAndGateOutputEnable function 5-1703
PLIB_CMP_StopInIdleModeDisable function 5-1695
PLIB_CMP_StopInIdleModeEnable function 5-1696
plib_dma.h 5-1859
PLIB_DMA_AbortTransferSet function 5-1758
PLIB_DMA_BusyActiveReset function 5-1755
PLIB_DMA_BusyActiveSet function 5-1755
PLIB_DMA_ChannelBitsGet function 5-1820
PLIB_DMA_ChannelPriorityGet function 5-1788
PLIB_DMA_ChannelPrioritySelect function 5-1788
PLIB_DMA_ChannelXAbortIRQSet function 5-1759
PLIB_DMA_ChannelXAddressModeGet function 5-1766
PLIB_DMA_ChannelXAddressModeSelect function 5-1767
PLIB_DMA_ChannelXAutoDisable function 5-1789
PLIB_DMA_ChannelXAutoEnable function 5-1789
PLIB_DMA_ChannelXAutoIsEnabled function 5-1815
PLIB_DMA_ChannelXBufferedDataIsWritten function 5-1816
PLIB_DMA_ChannelXBusyActiveSet function 5-1790
PLIB_DMA_ChannelXBusyInActiveSet function 5-1790
PLIB_DMA_ChannelXBusyIsBusy function 5-1816
PLIB_DMA_ChannelXCellProgressPointerGet function 5-1779
PLIB_DMA_ChannelXCellSizeGet function 5-1779
PLIB_DMA_ChannelXCellSizeSet function 5-1780
PLIB_DMA_ChannelXChainDisable function 5-1791
PLIB_DMA_ChannelXChainEnable function 5-1791
PLIB_DMA_ChannelXChainIsEnabled function 5-1817
PLIB_DMA_ChannelXChainToHigher function 5-1792
PLIB_DMA_ChannelXChainToLower function 5-1792
PLIB_DMA_ChannelXCollisionStatus function 5-1817
PLIB_DMA_ChannelXDataSizeGet function 5-1780
PLIB_DMA_ChannelXDataSizeSelect function 5-1781
PLIB_DMA_ChannelXDestinationAddressModeGet function
5-1768
PLIB_DMA_ChannelXDestinationAddressModeSelect function
5-1768
PLIB_DMA_ChannelXDestinationPointerGet function 5-1782
PLIB_DMA_ChannelXDestinationSizeGet function 5-1782
PLIB_DMA_ChannelXDestinationSizeSet function 5-1783
PLIB_DMA_ChannelXDestinationStartAddressGet function
5-1774
PLIB_DMA_ChannelXDestinationStartAddressSet function
5-1774
PLIB_DMA_ChannelXDisable function 5-1793
PLIB_DMA_ChannelXDisabledDisablesEvents function 5-1796
PLIB_DMA_ChannelXDisabledEnablesEvents function 5-1797
PLIB_DMA_ChannelXEnable function 5-1793
9 MPLAB Harmony Help
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PLIB_DMA_ChannelXEventIsDetected function 5-1818
PLIB_DMA_ChannelXINTSourceDisable function 5-1763
PLIB_DMA_ChannelXINTSourceEnable function 5-1763
PLIB_DMA_ChannelXINTSourceFlagClear function 5-1764
PLIB_DMA_ChannelXINTSourceFlagGet function 5-1764
PLIB_DMA_ChannelXINTSourceFlagSet function 5-1765
PLIB_DMA_ChannelXINTSourceIsEnabled function 5-1766
PLIB_DMA_ChannelXIsEnabled function 5-1819
PLIB_DMA_ChannelXNullWriteModeDisable function 5-1769
PLIB_DMA_ChannelXNullWriteModeEnable function 5-1769
PLIB_DMA_ChannelXNullWriteModeIsEnabled function 5-1819
PLIB_DMA_ChannelXOperatingTransferModeGet function
5-1770
PLIB_DMA_ChannelXOperatingTransferModeSelect function
5-1770
PLIB_DMA_ChannelXPatternDataGet function 5-1783
PLIB_DMA_ChannelXPatternDataSet function 5-1784
PLIB_DMA_ChannelXPatternIgnoreByteDisable function 5-1797
PLIB_DMA_ChannelXPatternIgnoreByteEnable function 5-1798
PLIB_DMA_ChannelXPatternIgnoreByteIsEnabled function
5-1798
PLIB_DMA_ChannelXPatternIgnoreGet function 5-1799
PLIB_DMA_ChannelXPatternIgnoreSet function 5-1799
PLIB_DMA_ChannelXPatternLengthGet function 5-1800
PLIB_DMA_ChannelXPatternLengthSet function 5-1801
PLIB_DMA_ChannelXPeripheralAddressGet function 5-1775
PLIB_DMA_ChannelXPeripheralAddressSet function 5-1775
PLIB_DMA_ChannelXPingPongModeGet function 5-1820
PLIB_DMA_ChannelXPriorityGet function 5-1794
PLIB_DMA_ChannelXPrioritySelect function 5-1794
PLIB_DMA_ChannelXReloadDisable function 5-1771
PLIB_DMA_ChannelXReloadEnable function 5-1771
PLIB_DMA_ChannelXReloadIsEnabled function 5-1773
PLIB_DMA_ChannelXSourceAddressModeGet function 5-1772
PLIB_DMA_ChannelXSourceAddressModeSelect function
5-1772
PLIB_DMA_ChannelXSourcePointerGet function 5-1785
PLIB_DMA_ChannelXSourceSizeGet function 5-1785
PLIB_DMA_ChannelXSourceSizeSet function 5-1786
PLIB_DMA_ChannelXSourceStartAddressGet function 5-1776
PLIB_DMA_ChannelXSourceStartAddressSet function 5-1777
PLIB_DMA_ChannelXStartAddressOffsetGet function 5-1777
PLIB_DMA_ChannelXStartAddressOffsetSet function 5-1778
PLIB_DMA_ChannelXStartIRQSet function 5-1760
PLIB_DMA_ChannelXTransferCountGet function 5-1786
PLIB_DMA_ChannelXTransferCountSet function 5-1787
PLIB_DMA_ChannelXTransferDirectionGet function 5-1795
PLIB_DMA_ChannelXTransferDirectionSelect function 5-1796
PLIB_DMA_ChannelXTriggerDisable function 5-1761
PLIB_DMA_ChannelXTriggerEnable function 5-1761
PLIB_DMA_ChannelXTriggerIsEnabled function 5-1762
PLIB_DMA_CRCAppendModeDisable function 5-1801
PLIB_DMA_CRCAppendModeEnable function 5-1802
PLIB_DMA_CRCAppendModeIsEnabled function 5-1802
PLIB_DMA_CRCBitOrderSelect function 5-1803
PLIB_DMA_CRCByteOrderGet function 5-1803
PLIB_DMA_CRCByteOrderSelect function 5-1804
PLIB_DMA_CRCChannelGet function 5-1804
PLIB_DMA_CRCChannelSelect function 5-1805
PLIB_DMA_CRCDataRead function 5-1805
PLIB_DMA_CRCDataWrite function 5-1806
PLIB_DMA_CRCDisable function 5-1806
PLIB_DMA_CRCEnable function 5-1807
PLIB_DMA_CRCIsEnabled function 5-1811
PLIB_DMA_CRCPolynomialLengthGet function 5-1807
PLIB_DMA_CRCPolynomialLengthSet function 5-1808
PLIB_DMA_CRCTypeGet function 5-1808
PLIB_DMA_CRCTypeSet function 5-1809
PLIB_DMA_CRCWriteByteOrderAlter function 5-1809
PLIB_DMA_CRCWriteByteOrderMaintain function 5-1810
PLIB_DMA_CRCXOREnableGet function 5-1810
PLIB_DMA_CRCXOREnableSet function 5-1810
PLIB_DMA_Disable function 5-1756
PLIB_DMA_Enable function 5-1756
PLIB_DMA_ExistsAbortTransfer function 5-1835
PLIB_DMA_ExistsBusy function 5-1835
PLIB_DMA_ExistsChannelBits function 5-1836
PLIB_DMA_ExistsChannelX function 5-1837
PLIB_DMA_ExistsChannelXAbortIRQ function 5-1837
PLIB_DMA_ExistsChannelXAuto function 5-1838
9 MPLAB Harmony Help
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PLIB_DMA_ExistsChannelXBusy function 5-1838
PLIB_DMA_ExistsChannelXCellProgressPointer function 5-1839
PLIB_DMA_ExistsChannelXCellSize function 5-1839
PLIB_DMA_ExistsChannelXChain function 5-1840
PLIB_DMA_ExistsChannelXChainEnbl function 5-1840
PLIB_DMA_ExistsChannelXDestinationPointer function 5-1841
PLIB_DMA_ExistsChannelXDestinationSize function 5-1841
PLIB_DMA_ExistsChannelXDestinationStartAddress function
5-1842
PLIB_DMA_ExistsChannelXDisabled function 5-1843
PLIB_DMA_ExistsChannelXEvent function 5-1843
PLIB_DMA_ExistsChannelXINTSource function 5-1844
PLIB_DMA_ExistsChannelXINTSourceFlag function 5-1844
PLIB_DMA_ExistsChannelXPatternData function 5-1845
PLIB_DMA_ExistsChannelXPatternIgnore function 5-1845
PLIB_DMA_ExistsChannelXPatternIgnoreByte function 5-1846
PLIB_DMA_ExistsChannelXPatternLength function 5-1846
PLIB_DMA_ExistsChannelXPriority function 5-1847
PLIB_DMA_ExistsChannelXSourcePointer function 5-1847
PLIB_DMA_ExistsChannelXSourceSize function 5-1848
PLIB_DMA_ExistsChannelXSourceStartAddress function
5-1848
PLIB_DMA_ExistsChannelXStartIRQ function 5-1849
PLIB_DMA_ExistsChannelXTrigger function 5-1849
PLIB_DMA_ExistsCRC function 5-1850
PLIB_DMA_ExistsCRCAppendMode function 5-1850
PLIB_DMA_ExistsCRCBitOrder function 5-1851
PLIB_DMA_ExistsCRCByteOrder function 5-1852
PLIB_DMA_ExistsCRCChannel function 5-1852
PLIB_DMA_ExistsCRCData function 5-1853
PLIB_DMA_ExistsCRCPolynomialLength function 5-1853
PLIB_DMA_ExistsCRCType function 5-1854
PLIB_DMA_ExistsCRCWriteByteOrder function 5-1854
PLIB_DMA_ExistsCRCXOREnable function 5-1855
PLIB_DMA_ExistsEnableControl function 5-1855
PLIB_DMA_ExistsLastBusAccess function 5-1856
PLIB_DMA_ExistsRecentAddress function 5-1856
PLIB_DMA_ExistsStartTransfer function 5-1857
PLIB_DMA_ExistsStopInIdle function 5-1857
PLIB_DMA_ExistsSuspend function 5-1858
PLIB_DMA_IsBusy function 5-1812
PLIB_DMA_IsEnabled function 5-1812
PLIB_DMA_LastBusAccessIsRead function 5-1813
PLIB_DMA_LastBusAccessIsWrite function 5-1813
PLIB_DMA_LastChannelActive function 5-1814
PLIB_DMA_RecentAddressAccessed function 5-1814
PLIB_DMA_StartTransferSet function 5-1759
PLIB_DMA_StopInIdleDisable function 5-1756
PLIB_DMA_StopInIdleEnable function 5-1757
PLIB_DMA_SuspendDisable function 5-1757
PLIB_DMA_SuspendEnable function 5-1758
PLIB_DMA_SuspendIsEnabled function 5-1814
plib_ebi.h 5-1900
PLIB_EBI_AddressHoldTimeGet function 5-1869
PLIB_EBI_AddressPinEnableBitsSet function 5-1876
PLIB_EBI_AddressSetupTimeGet function 5-1870
PLIB_EBI_BaseAddressGet function 5-1870
PLIB_EBI_BaseAddressSet function 5-1876
PLIB_EBI_ByteSelectPinSet function 5-1877
PLIB_EBI_ChipSelectEnableSet function 5-1878
PLIB_EBI_ControlEnableClear function 5-1869
PLIB_EBI_ControlEnableGet function 5-1870
PLIB_EBI_ControlEnableSet function 5-1886
PLIB_EBI_DataEnableSet function 5-1878
PLIB_EBI_DataTurnAroundTimeGet function 5-1871
PLIB_EBI_ExistsAddressHoldTime function 5-1887
PLIB_EBI_ExistsAddressPinEnableBits function 5-1887
PLIB_EBI_ExistsAddressSetupTime function 5-1888
PLIB_EBI_ExistsBaseAddress function 5-1888
PLIB_EBI_ExistsByteSelectPin function 5-1889
PLIB_EBI_ExistsChipSelectEnable function 5-1889
PLIB_EBI_ExistsControlEnable function 5-1890
PLIB_EBI_ExistsDataEnable function 5-1890
PLIB_EBI_ExistsDataTurnAroundTime function 5-1891
PLIB_EBI_ExistsFlashPowerDownMode function 5-1891
PLIB_EBI_ExistsFlashResetPin function 5-1892
PLIB_EBI_ExistsFlashTiming function 5-1892
PLIB_EBI_ExistsMemoryCharacteristics function 5-1893
PLIB_EBI_ExistsMemoryPaging function 5-1893
9 MPLAB Harmony Help
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PLIB_EBI_ExistsMemoryTimingConfig function 5-1894
PLIB_EBI_ExistsPageMode function 5-1894
PLIB_EBI_ExistsPageReadTime function 5-1895
PLIB_EBI_ExistsReadCycleTime function 5-1895
PLIB_EBI_ExistsReadyMode function 5-1896
PLIB_EBI_ExistsReadyPin1Config function 5-1896
PLIB_EBI_ExistsReadyPin2Config function 5-1897
PLIB_EBI_ExistsReadyPin3Config function 5-1897
PLIB_EBI_ExistsReadyPinSens function 5-1898
PLIB_EBI_ExistsStaticMemoryWidthRegister function 5-1898
PLIB_EBI_ExistsWriteOutputControl function 5-1899
PLIB_EBI_ExistsWritePulseWidth function 5-1899
PLIB_EBI_FlashPowerDownModeGet function 5-1871
PLIB_EBI_FlashPowerDownModeSet function 5-1879
PLIB_EBI_FlashResetPinGet function 5-1872
PLIB_EBI_FlashResetPinSet function 5-1879
PLIB_EBI_FlashTimingGet function 5-1872
PLIB_EBI_FlashTimingSet function 5-1880
PLIB_EBI_MemoryCharacteristicsSet function 5-1880
PLIB_EBI_MemoryPagingSet function 5-1881
PLIB_EBI_MemoryTimingConfigSet function 5-1882
PLIB_EBI_PageModeGet function 5-1873
PLIB_EBI_PageReadCycleTimeGet function 5-1873
PLIB_EBI_PageSizeGet function 5-1873
PLIB_EBI_ReadCycleTimeGet function 5-1874
PLIB_EBI_ReadyModeGet function 5-1874
PLIB_EBI_ReadyModeSet function 5-1886
PLIB_EBI_ReadyPin1ConfigSet function 5-1882
PLIB_EBI_ReadyPin2ConfigSet function 5-1883
PLIB_EBI_ReadyPin3ConfigSet function 5-1884
PLIB_EBI_ReadyPinSensSet function 5-1884
PLIB_EBI_StaticMemoryWidthRegisterGet function 5-1875
PLIB_EBI_StaticMemoryWidthRegisterSet function 5-1885
PLIB_EBI_WriteOutputControlSet function 5-1885
PLIB_EBI_WritePulseWidthGet function 5-1875
plib_eth.h 5-2052
PLIB_ETH_AlignErrorCountClear function 5-2019
PLIB_ETH_AlignErrorCountGet function 5-2019
PLIB_ETH_AutoDetectPadClear function 5-1929
PLIB_ETH_AutoDetectPadGet function 5-1929
PLIB_ETH_AutoDetectPadSet function 5-1930
PLIB_ETH_AutoFlowControlDisable function 5-1998
PLIB_ETH_AutoFlowControlEnable function 5-1999
PLIB_ETH_AutoFlowControlIsEnabled function 5-1999
PLIB_ETH_BackPresNoBackoffDisable function 5-2000
PLIB_ETH_BackPresNoBackoffEnable function 5-2000
PLIB_ETH_BackPresNoBackoffIsEnabled function 5-2001
PLIB_ETH_BackToBackIPGGet function 5-1930
PLIB_ETH_BackToBackIPGSet function 5-1931
PLIB_ETH_CollisionWindowGet function 5-1932
PLIB_ETH_CollisionWindowSet function 5-1932
PLIB_ETH_CRCDisable function 5-1982
PLIB_ETH_CRCEnable function 5-1983
PLIB_ETH_CRCIsEnabled function 5-1983
PLIB_ETH_DataNotValid function 5-1984
PLIB_ETH_DelayedCRCDisable function 5-1933
PLIB_ETH_DelayedCRCEnable function 5-1933
PLIB_ETH_DelayedCRCIsEnabled function 5-1934
PLIB_ETH_Disable function 5-1934
PLIB_ETH_Enable function 5-1935
PLIB_ETH_EthernetIsBusy function 5-1984
PLIB_ETH_ExcessDeferDisable function 5-1935
PLIB_ETH_ExcessDeferEnable function 5-1936
PLIB_ETH_ExcessDeferIsEnabled function 5-1936
PLIB_ETH_ExistsAlignmentErrorCount function 5-2026
PLIB_ETH_ExistsAutoFlowControl function 5-2027
PLIB_ETH_ExistsCollisionCounts function 5-2028
PLIB_ETH_ExistsCollisionWindow function 5-2028
PLIB_ETH_ExistsEnable function 5-2029
PLIB_ETH_ExistsEthernetControllerStatus function 5-2029
PLIB_ETH_ExistsFCSErrorCount function 5-2030
PLIB_ETH_ExistsFramesTransmittedOK function 5-2030
PLIB_ETH_ExistsFramexReceivedOK function 5-2031
PLIB_ETH_ExistsHashTable function 5-2031
PLIB_ETH_ExistsInterPacketGaps function 5-2032
PLIB_ETH_ExistsInterrupt function 5-2033
PLIB_ETH_ExistsMAC_Configuration function 5-2033
PLIB_ETH_ExistsMAC_Resets function 5-2035
9 MPLAB Harmony Help
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PLIB_ETH_ExistsMAC_Testing function 5-2036
PLIB_ETH_ExistsManualFlowControl function 5-2037
PLIB_ETH_ExistsMaxFrameLength function 5-2037
PLIB_ETH_ExistsMIIM_Config function 5-2038
PLIB_ETH_ExistsMIIM_Indicators function 5-2038
PLIB_ETH_ExistsMIIMAddresses function 5-2039
PLIB_ETH_ExistsMIIMReadWrite function 5-2040
PLIB_ETH_ExistsMIIMScanMode function 5-2040
PLIB_ETH_ExistsMIIWriteReadData function 5-2041
PLIB_ETH_ExistsPatternMatch function 5-2041
PLIB_ETH_ExistsPauseTimer function 5-2042
PLIB_ETH_ExistsReceiveBufferSize function 5-2042
PLIB_ETH_ExistsReceiveFilters function 5-2043
PLIB_ETH_ExistsReceiveOverflowCount function 5-2043
PLIB_ETH_ExistsReceiveWmarks function 5-2044
PLIB_ETH_ExistsRetransmissionMaximum function 5-2045
PLIB_ETH_ExistsRMII_Support function 5-2045
PLIB_ETH_ExistsRxBufferCountDecrement function 5-2046
PLIB_ETH_ExistsRxEnable function 5-2046
PLIB_ETH_ExistsRxPacketDescriptorAddress function 5-2047
PLIB_ETH_ExistsStationAddress function 5-2047
PLIB_ETH_ExistsStopInIdle function 5-2048
PLIB_ETH_ExistsTransmitRTS function 5-2048
PLIB_ETH_ExistsTxPacketDescriptorAddress function 5-2049
PLIB_ETH_FCSErrorCountClear function 5-2020
PLIB_ETH_FCSErrorCountGet function 5-2020
PLIB_ETH_FrameLengthCheckDisable function 5-1937
PLIB_ETH_FrameLengthCheckEnable function 5-1937
PLIB_ETH_FrameLengthCheckIsEnabled function 5-1938
PLIB_ETH_FramesRxdOkCountClear function 5-2021
PLIB_ETH_FramesRxdOkCountGet function 5-2021
PLIB_ETH_FramesTxdOkCountClear function 5-2022
PLIB_ETH_FramesTxdOkCountGet function 5-2022
PLIB_ETH_FullDuplexDisable function 5-1938
PLIB_ETH_FullDuplexEnable function 5-1939
PLIB_ETH_FullDuplexIsEnabled function 5-1939
PLIB_ETH_HashTableGet function 5-1987
PLIB_ETH_HashTableSet function 5-1988
PLIB_ETH_HugeFrameDisable function 5-1940
PLIB_ETH_HugeFrameEnable function 5-1940
PLIB_ETH_HugeFrameIsEnabled function 5-1941
PLIB_ETH_InterruptClear function 5-2014
PLIB_ETH_InterruptSet function 5-2015
PLIB_ETH_InterruptsGet function 5-2015
PLIB_ETH_InterruptSourceDisable function 5-2016
PLIB_ETH_InterruptSourceEnable function 5-2016
PLIB_ETH_InterruptSourceIsEnabled function 5-2017
PLIB_ETH_InterruptSourcesGet function 5-2018
PLIB_ETH_InterruptStatusGet function 5-2018
PLIB_ETH_IsEnabled function 5-1941
PLIB_ETH_LinkHasFailed function 5-1985
PLIB_ETH_LongPreambleDisable function 5-1942
PLIB_ETH_LongPreambleEnable function 5-1942
PLIB_ETH_LongPreambleIsEnabled function 5-1943
PLIB_ETH_LoopbackDisable function 5-1943
PLIB_ETH_LoopbackEnable function 5-1944
PLIB_ETH_LoopbackIsEnabled function 5-1944
PLIB_ETH_ManualFlowControlDisable function 5-2001
PLIB_ETH_ManualFlowControlEnable function 5-2002
PLIB_ETH_ManualFlowControlIsEnabled function 5-2002
PLIB_ETH_MaxFrameLengthGet function 5-1945
PLIB_ETH_MaxFrameLengthSet function 5-1945
PLIB_ETH_MCSRxResetDisable function 5-1957
PLIB_ETH_MCSRxResetEnable function 5-1958
PLIB_ETH_MCSRxResetIsEnabled function 5-1958
PLIB_ETH_MCSTxResetDisable function 5-1959
PLIB_ETH_MCSTxResetEnable function 5-1959
PLIB_ETH_MCSTxResetIsEnabled function 5-1960
PLIB_ETH_MIIMClockGet function 5-1946
PLIB_ETH_MIIMClockSet function 5-1946
PLIB_ETH_MIIMIsBusy function 5-1985
PLIB_ETH_MIIMIsScanning function 5-1986
PLIB_ETH_MIIMNoPreDisable function 5-1947
PLIB_ETH_MIIMNoPreEnable function 5-1947
PLIB_ETH_MIIMNoPreIsEnabled function 5-1948
PLIB_ETH_MIIMReadDataGet function 5-1960
PLIB_ETH_MIIMReadStart function 5-1961
PLIB_ETH_MIIMResetDisable function 5-1961
9 MPLAB Harmony Help
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PLIB_ETH_MIIMResetEnable function 5-1962
PLIB_ETH_MIIMResetIsEnabled function 5-1962
PLIB_ETH_MIIMScanIncrDisable function 5-1963
PLIB_ETH_MIIMScanIncrEnable function 5-1963
PLIB_ETH_MIIMScanIncrIsEnabled function 5-1964
PLIB_ETH_MIIMScanModeDisable function 5-1964
PLIB_ETH_MIIMScanModeEnable function 5-1965
PLIB_ETH_MIIMScanModeIsEnabled function 5-1965
PLIB_ETH_MIIMWriteDataSet function 5-1966
PLIB_ETH_MIIMWriteStart function 5-1966
PLIB_ETH_MIIResetDisable function 5-1967
PLIB_ETH_MIIResetEnable function 5-1968
PLIB_ETH_MIIResetIsEnabled function 5-1968
PLIB_ETH_MultipleCollisionCountClear function 5-2023
PLIB_ETH_MultipleCollisionCountGet function 5-2023
PLIB_ETH_NoBackoffDisable function 5-2003
PLIB_ETH_NoBackoffEnable function 5-2003
PLIB_ETH_NoBackoffIsEnabled function 5-2004
PLIB_ETH_NonBackToBackIPG1Get function 5-1948
PLIB_ETH_NonBackToBackIPG1Set function 5-1949
PLIB_ETH_NonBackToBackIPG2Get function 5-1949
PLIB_ETH_NonBackToBackIPG2Set function 5-1950
PLIB_ETH_PassAllDisable function 5-1988
PLIB_ETH_PassAllEnable function 5-1989
PLIB_ETH_PassAllIsEnabled function 5-1989
PLIB_ETH_PatternMatchChecksumGet function 5-1990
PLIB_ETH_PatternMatchChecksumSet function 5-1990
PLIB_ETH_PatternMatchGet function 5-1991
PLIB_ETH_PatternMatchModeGet function 5-1991
PLIB_ETH_PatternMatchModeSet function 5-1992
PLIB_ETH_PatternMatchOffsetGet function 5-1992
PLIB_ETH_PatternMatchOffsetSet function 5-1993
PLIB_ETH_PatternMatchSet function 5-1993
PLIB_ETH_PauseTimerGet function 5-1950
PLIB_ETH_PauseTimerSet function 5-1951
PLIB_ETH_PHYAddressGet function 5-1969
PLIB_ETH_PHYAddressSet function 5-1969
PLIB_ETH_PurePreambleDisable function 5-1994
PLIB_ETH_PurePreambleEnable function 5-1994
PLIB_ETH_PurePreambleIsEnabled function 5-1995
PLIB_ETH_ReceiveBufferSizeGet function 5-1951
PLIB_ETH_ReceiveBufferSizeSet function 5-1952
PLIB_ETH_ReceiveDisable function 5-1952
PLIB_ETH_ReceiveEnable function 5-1953
PLIB_ETH_ReceiveFilterDisable function 5-1995
PLIB_ETH_ReceiveFilterEnable function 5-1996
PLIB_ETH_ReceiveFilterIsEnable function 5-1997
PLIB_ETH_ReceiveIsBusy function 5-1986
PLIB_ETH_ReceiveIsEnabled function 5-1953
PLIB_ETH_RegisterAddressGet function 5-1970
PLIB_ETH_RegisterAddressSet function 5-1970
PLIB_ETH_ReTxMaxGet function 5-1954
PLIB_ETH_ReTxMaxSet function 5-1954
PLIB_ETH_RMIIResetDisable function 5-1971
PLIB_ETH_RMIIResetEnable function 5-1971
PLIB_ETH_RMIIResetIsEnabled function 5-1972
PLIB_ETH_RMIISpeedGet function 5-1955
PLIB_ETH_RMIISpeedSet function 5-1955
PLIB_ETH_RxBufferCountDecrement function 5-1972
PLIB_ETH_RxDisable function 5-1973
PLIB_ETH_RxEmptyWmarkGet function 5-2004
PLIB_ETH_RxEmptyWmarkSet function 5-2005
PLIB_ETH_RxEnable function 5-1973
PLIB_ETH_RxFullWmarkGet function 5-2006
PLIB_ETH_RxFullWmarkSet function 5-2006
PLIB_ETH_RxFuncResetDisable function 5-1974
PLIB_ETH_RxFuncResetEnable function 5-1974
PLIB_ETH_RxFuncResetIsEnabled function 5-1975
PLIB_ETH_RxIsEnabled function 5-1975
PLIB_ETH_RxOverflowCountClear function 5-2024
PLIB_ETH_RxOverflowCountGet function 5-2024
PLIB_ETH_RxPacketCountGet function 5-2025
PLIB_ETH_RxPacketDescAddrGet function 5-1976
PLIB_ETH_RxPacketDescAddrSet function 5-1976
PLIB_ETH_RxPauseDisable function 5-2007
PLIB_ETH_RxPauseEnable function 5-2007
PLIB_ETH_RxPauseIsEnabled function 5-2008
PLIB_ETH_ShortcutQuantaDisable function 5-2008
9 MPLAB Harmony Help
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PLIB_ETH_ShortcutQuantaEnable function 5-2009
PLIB_ETH_ShortcutQuantaIsEnabled function 5-2009
PLIB_ETH_SimResetDisable function 5-2010
PLIB_ETH_SimResetEnable function 5-2010
PLIB_ETH_SimResetIsEnabled function 5-2011
PLIB_ETH_SingleCollisionCountClear function 5-2025
PLIB_ETH_SingleCollisionCountGet function 5-2026
PLIB_ETH_StationAddressGet function 5-1997
PLIB_ETH_StationAddressSet function 5-1998
PLIB_ETH_StopInIdleDisable function 5-1956
PLIB_ETH_StopInIdleEnable function 5-1956
PLIB_ETH_StopInIdleIsEnabled function 5-1957
PLIB_ETH_TestBackPressDisable function 5-2011
PLIB_ETH_TestBackPressEnable function 5-2012
PLIB_ETH_TestBackPressIsEnabled function 5-2012
PLIB_ETH_TestPauseDisable function 5-1977
PLIB_ETH_TestPauseEnable function 5-1977
PLIB_ETH_TestPauseIsEnabled function 5-1978
PLIB_ETH_TransmitIsBusy function 5-1987
PLIB_ETH_TxFuncResetDisable function 5-1978
PLIB_ETH_TxFuncResetEnable function 5-1979
PLIB_ETH_TxFuncResetIsEnabled function 5-1979
PLIB_ETH_TxPacketDescAddrGet function 5-1980
PLIB_ETH_TxPacketDescAddrSet function 5-1980
PLIB_ETH_TxPauseDisable function 5-2013
PLIB_ETH_TxPauseEnable function 5-2013
PLIB_ETH_TxPauseIsEnabled function 5-2014
PLIB_ETH_TxRTSDisable function 5-1981
PLIB_ETH_TxRTSEnable function 5-1981
PLIB_ETH_TxRTSIsEnabled function 5-1982
plib_i2c.h 5-2166
PLIB_I2C_AcksequenceIsInProgress function 5-2122
PLIB_I2C_ArbitrationLossClear function 5-2103
PLIB_I2C_ArbitrationLossHasOccurred function 5-2104
PLIB_I2C_BaudRateGet function 5-2109
PLIB_I2C_BaudRateSet function 5-2109
PLIB_I2C_BusIsIdle function 5-2105
PLIB_I2C_DataLineHoldTimeSet function 5-2123
PLIB_I2C_Disable function 5-2093
PLIB_I2C_Enable function 5-2094
PLIB_I2C_ExistsAcksequenceProgress function 5-2144
PLIB_I2C_ExistsArbitrationLoss function 5-2144
PLIB_I2C_ExistsBaudRate function 5-2145
PLIB_I2C_ExistsBusIsIdle function 5-2146
PLIB_I2C_ExistsClockStretching function 5-2146
PLIB_I2C_ExistsDataLineHoldTime function 5-2147
PLIB_I2C_ExistsGeneralCall function 5-2147
PLIB_I2C_ExistsGeneralCallAddressDetect function 5-2148
PLIB_I2C_ExistsHighFrequency function 5-2148
PLIB_I2C_ExistsIPMI function 5-2149
PLIB_I2C_ExistsMasterReceiverClock1Byte function 5-2149
PLIB_I2C_ExistsMasterStart function 5-2150
PLIB_I2C_ExistsMasterStartRepeat function 5-2150
PLIB_I2C_ExistsMasterStop function 5-2151
PLIB_I2C_ExistsModuleEnable function 5-2151
PLIB_I2C_ExistsReceivedByteAcknowledge function 5-2152
PLIB_I2C_ExistsReceivedByteAvailable function 5-2152
PLIB_I2C_ExistsReceivedByteGet function 5-2153
PLIB_I2C_ExistsReceiverOverflow function 5-2153
PLIB_I2C_ExistsReservedAddressProtect function 5-2154
PLIB_I2C_ExistsSlaveAddress10Bit function 5-2154
PLIB_I2C_ExistsSlaveAddress7Bit function 5-2155
PLIB_I2C_ExistsSlaveAddressDetect function 5-2155
PLIB_I2C_ExistsSlaveAddressHoldEnable function 5-2156
PLIB_I2C_ExistsSlaveBufferOverwrite function 5-2156
PLIB_I2C_ExistsSlaveBusCollisionDetect function 5-2157
PLIB_I2C_ExistsSlaveClockHold function 5-2157
PLIB_I2C_ExistsSlaveDataDetect function 5-2158
PLIB_I2C_ExistsSlaveInterruptOnStart function 5-2158
PLIB_I2C_ExistsSlaveInterruptOnStop function 5-2159
PLIB_I2C_ExistsSlaveMask function 5-2160
PLIB_I2C_ExistsSlaveReadRequest function 5-2160
PLIB_I2C_ExistsSMBus function 5-2161
PLIB_I2C_ExistsStartDetect function 5-2161
PLIB_I2C_ExistsStopDetect function 5-2162
PLIB_I2C_ExistsStopInIdle function 5-2162
PLIB_I2C_ExistsTransmitterByteAcknowledge function 5-2163
PLIB_I2C_ExistsTransmitterByteComplete function 5-2163
9 MPLAB Harmony Help
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PLIB_I2C_ExistsTransmitterByteSend function 5-2164
PLIB_I2C_ExistsTransmitterIsBusy function 5-2164
PLIB_I2C_ExistsTransmitterOverflow function 5-2165
PLIB_I2C_GeneralCallDisable function 5-2094
PLIB_I2C_GeneralCallEnable function 5-2095
PLIB_I2C_HighFrequencyDisable function 5-2096
PLIB_I2C_HighFrequencyEnable function 5-2096
PLIB_I2C_IPMIDisable function 5-2097
PLIB_I2C_IPMIEnable function 5-2098
PLIB_I2C_MasterReceiverClock1Byte function 5-2131
PLIB_I2C_MasterReceiverReadyToAcknowledge function
5-2143
PLIB_I2C_MasterStart function 5-2132
PLIB_I2C_MasterStartRepeat function 5-2132
PLIB_I2C_MasterStop function 5-2133
PLIB_I2C_ReceivedByteAcknowledge function 5-2139
PLIB_I2C_ReceivedByteGet function 5-2140
PLIB_I2C_ReceivedByteIsAvailable function 5-2140
PLIB_I2C_ReceiverByteAcknowledgeHasCompleted function
5-2141
PLIB_I2C_ReceiverOverflowClear function 5-2142
PLIB_I2C_ReceiverOverflowHasOccurred function 5-2142
PLIB_I2C_ReservedAddressProtectDisable function 5-2098
PLIB_I2C_ReservedAddressProtectEnable function 5-2099
PLIB_I2C_SlaveAddress10BitGet function 5-2110
PLIB_I2C_SlaveAddress10BitSet function 5-2111
PLIB_I2C_SlaveAddress10BitWasDetected function 5-2112
PLIB_I2C_SlaveAddress7BitGet function 5-2112
PLIB_I2C_SlaveAddress7BitSet function 5-2113
PLIB_I2C_SlaveAddressHoldDisable function 5-2114
PLIB_I2C_SlaveAddressHoldEnable function 5-2114
PLIB_I2C_SlaveAddressIsDetected function 5-2115
PLIB_I2C_SlaveAddressIsGeneralCall function 5-2116
PLIB_I2C_SlaveAddressModeIs10Bits function 5-2117
PLIB_I2C_SlaveBufferOverwriteDisable function 5-2124
PLIB_I2C_SlaveBufferOverwriteEnable function 5-2124
PLIB_I2C_SlaveBusCollisionDetectDisable function 5-2125
PLIB_I2C_SlaveBusCollisionDetectEnable function 5-2125
PLIB_I2C_SlaveClockHold function 5-2126
PLIB_I2C_SlaveClockRelease function 5-2127
PLIB_I2C_SlaveClockStretchingDisable function 5-2099
PLIB_I2C_SlaveClockStretchingEnable function 5-2100
PLIB_I2C_SlaveDataHoldDisable function 5-2127
PLIB_I2C_SlaveDataHoldEnable function 5-2128
PLIB_I2C_SlaveDataIsDetected function 5-2117
PLIB_I2C_SlaveInterruptOnStartDisable function 5-2129
PLIB_I2C_SlaveInterruptOnStartEnable function 5-2129
PLIB_I2C_SlaveInterruptOnStopDisable function 5-2130
PLIB_I2C_SlaveInterruptOnStopEnable function 5-2130
PLIB_I2C_SlaveMask10BitGet function 5-2119
PLIB_I2C_SlaveMask10BitSet function 5-2120
PLIB_I2C_SlaveMask7BitGet function 5-2121
PLIB_I2C_SlaveMask7BitSet function 5-2121
PLIB_I2C_SlaveReadIsRequested function 5-2118
PLIB_I2C_SMBDisable function 5-2101
PLIB_I2C_SMBEnable function 5-2101
PLIB_I2C_StartClear function 5-2106
PLIB_I2C_StartWasDetected function 5-2106
PLIB_I2C_StopClear function 5-2107
PLIB_I2C_StopInIdleDisable function 5-2102
PLIB_I2C_StopInIdleEnable function 5-2103
PLIB_I2C_StopWasDetected function 5-2108
PLIB_I2C_TransmitterByteHasCompleted function 5-2134
PLIB_I2C_TransmitterByteSend function 5-2134
PLIB_I2C_TransmitterByteWasAcknowledged function 5-2135
PLIB_I2C_TransmitterIsBusy function 5-2136
PLIB_I2C_TransmitterIsReady function 5-2137
PLIB_I2C_TransmitterOverflowClear function 5-2138
PLIB_I2C_TransmitterOverflowHasOccurred function 5-2138
plib_ic.h 5-2201
PLIB_IC_AlternateClockDisable function 5-2182
PLIB_IC_AlternateClockEnable function 5-2183
PLIB_IC_Buffer16BitGet function 5-2183
PLIB_IC_Buffer32BitGet function 5-2184
PLIB_IC_BufferIsEmpty function 5-2184
PLIB_IC_BufferOverflowHasOccurred function 5-2185
PLIB_IC_BufferSizeSelect function 5-2185
PLIB_IC_ClockSourceSelect function 5-2179
PLIB_IC_Disable function 5-2177
9 MPLAB Harmony Help
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PLIB_IC_Enable function 5-2177
PLIB_IC_EventsPerInterruptSelect function 5-2178
PLIB_IC_ExistsAlternateClock function 5-2193
PLIB_IC_ExistsBufferIsEmptyStatus function 5-2193
PLIB_IC_ExistsBufferOverflowStatus function 5-2194
PLIB_IC_ExistsBufferSize function 5-2194
PLIB_IC_ExistsBufferValue function 5-2195
PLIB_IC_ExistsCaptureMode function 5-2195
PLIB_IC_ExistsClockSource function 5-2196
PLIB_IC_ExistsEdgeCapture function 5-2196
PLIB_IC_ExistsEnable function 5-2197
PLIB_IC_ExistsEventsPerInterruptSelect function 5-2197
PLIB_IC_ExistsStopInIdle function 5-2198
PLIB_IC_ExistsSyncMode function 5-2198
PLIB_IC_ExistsSyncModeInput function 5-2199
PLIB_IC_ExistsTimerSelect function 5-2199
PLIB_IC_ExistsTimerTriggered function 5-2200
PLIB_IC_FirstCaptureEdgeSelect function 5-2179
PLIB_IC_ModeSelect function 5-2186
PLIB_IC_StopInIdleDisable function 5-2187
PLIB_IC_StopInIdleEnable function 5-2187
PLIB_IC_SyncModeInputSelect function 5-2180
PLIB_IC_SyncModeSelect function 5-2180
PLIB_IC_TimerIsTriggered function 5-2181
PLIB_IC_TimerSelect function 5-2181
plib_int.h 5-2250
PLIB_INT_AlternateVectorTableSelect function 5-2208
PLIB_INT_CPUCurrentPriorityLevelGet function 5-2228
PLIB_INT_Disable function 5-2209
PLIB_INT_DISIStatusGet function 5-2209
PLIB_INT_Enable function 5-2210
PLIB_INT_ExistsAlternateVectorTable function 5-2240
PLIB_INT_ExistsCPUCurrentPriorityLevel function 5-2240
PLIB_INT_ExistsEnableControl function 5-2241
PLIB_INT_ExistsExternalINTEdgeSelect function 5-2241
PLIB_INT_ExistsHighPriority function 5-2242
PLIB_INT_ExistsINTCPUPriority function 5-2242
PLIB_INT_ExistsINTCPUVector function 5-2243
PLIB_INT_ExistsINTNesting function 5-2243
PLIB_INT_ExistsLowPriority function 5-2244
PLIB_INT_ExistsPeripheralControl function 5-2244
PLIB_INT_ExistsPriority function 5-2245
PLIB_INT_ExistsProximityTimerControl function 5-2245
PLIB_INT_ExistsProximityTimerEnable function 5-2246
PLIB_INT_ExistsSingleVectorShadowSet function 5-2246
PLIB_INT_ExistsSourceControl function 5-2247
PLIB_INT_ExistsSourceFlag function 5-2247
PLIB_INT_ExistsTrapSource function 5-2248
PLIB_INT_ExistsVectorPriority function 5-2248
PLIB_INT_ExistsVectorSelect function 5-2249
PLIB_INT_ExternalFallingEdgeSelect function 5-2210
PLIB_INT_ExternalRisingEdgeSelect function 5-2211
PLIB_INT_IsEnabled function 5-2211
PLIB_INT_MultiVectorSelect function 5-2212
PLIB_INT_NestingDisable function 5-2213
PLIB_INT_NestingEnable function 5-2213
PLIB_INT_PeripheralsDisable function 5-2214
PLIB_INT_PeripheralsEnable function 5-2214
PLIB_INT_PriorityDisable function 5-2214
PLIB_INT_PriorityEnable function 5-2215
PLIB_INT_PriorityGet function 5-2216
PLIB_INT_PriorityHighDisable function 5-2216
PLIB_INT_PriorityHighEnable function 5-2217
PLIB_INT_PriorityLowDisable function 5-2217
PLIB_INT_PriorityLowEnable function 5-2218
PLIB_INT_ProximityTimerDisable function 5-2218
PLIB_INT_ProximityTimerEnable function 5-2219
PLIB_INT_ProximityTimerGet function 5-2229
PLIB_INT_ProximityTimerSet function 5-2230
PLIB_INT_SingleVectorSelect function 5-2219
PLIB_INT_SingleVectorShadowSetDisable function 5-2220
PLIB_INT_SingleVectorShadowSetEnable function 5-2220
PLIB_INT_SourceDisable function 5-2221
PLIB_INT_SourceEnable function 5-2222
PLIB_INT_SourceFlagClear function 5-2223
PLIB_INT_SourceFlagGet function 5-2224
PLIB_INT_SourceFlagSet function 5-2225
PLIB_INT_SourceIsEnabled function 5-2225
9 MPLAB Harmony Help
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PLIB_INT_StandardVectorTableSelect function 5-2221
PLIB_INT_TrapSourceFlagClear function 5-2230
PLIB_INT_TrapSourceFlagGet function 5-2231
PLIB_INT_VectorGet function 5-2232
PLIB_INT_VectorPriorityGet function 5-2226
PLIB_INT_VectorPrioritySet function 5-2227
PLIB_INT_VectorSubPriorityGet function 5-2227
PLIB_INT_VectorSubPrioritySet function 5-2228
plib_nvm.h 5-2285
PLIB_NVM_BootPageWriteProtectionDisable function 5-2271
PLIB_NVM_BootPageWriteProtectionEnable function 5-2271
PLIB_NVM_DataBlockSourceAddress function 5-2263
PLIB_NVM_ExistsAccessEnable function 5-2274
PLIB_NVM_ExistsAddressModifyControl function 5-2275
PLIB_NVM_ExistsBootPageWriteProtect function 5-2275
PLIB_NVM_ExistsEEPROMReadInitiate function 5-2276
PLIB_NVM_ExistsFlashBankRegionSelect function 5-2276
PLIB_NVM_ExistsFlashWPMemoryRangeProvide function
5-2277
PLIB_NVM_ExistsKeySequence function 5-2277
PLIB_NVM_ExistsLockBootSelect function 5-2278
PLIB_NVM_ExistsLockPFMSelect function 5-2278
PLIB_NVM_ExistsLowVoltageError function 5-2279
PLIB_NVM_ExistsLowVoltageStatus function 5-2279
PLIB_NVM_ExistsMemoryModificationControl function 5-2280
PLIB_NVM_ExistsOperationMode function 5-2280
PLIB_NVM_ExistsProgramEraseOperation function 5-2281
PLIB_NVM_ExistsProvideData function 5-2281
PLIB_NVM_ExistsProvideQuadData function 5-2282
PLIB_NVM_ExistsSourceAddress function 5-2282
PLIB_NVM_ExistsStopInIdle function 5-2283
PLIB_NVM_ExistsWriteErrorStatus function 5-2283
PLIB_NVM_ExistsWriteOperation function 5-2284
PLIB_NVM_FlashAccessEnable function 5-2263
PLIB_NVM_FlashAddressToModify function 5-2264
PLIB_NVM_FlashEraseOperationSelect function 5-2264
PLIB_NVM_FlashEraseStart function 5-2265
PLIB_NVM_FlashProvideData function 5-2265
PLIB_NVM_FlashProvideQuadData function 5-2266
PLIB_NVM_FlashRead function 5-2266
PLIB_NVM_FlashWriteCycleHasCompleted function 5-2267
PLIB_NVM_FlashWriteKeySequence function 5-2267
PLIB_NVM_FlashWriteOperationSelect function 5-2268
PLIB_NVM_FlashWriteProtectMemoryAreaRange function
5-2268
PLIB_NVM_FlashWriteStart function 5-2269
PLIB_NVM_IsBootMemoryLocked function 5-2272
PLIB_NVM_IsBootPageWriteProtected function 5-2272
PLIB_NVM_IsProgramFlashMemoryLocked function 5-2269
PLIB_NVM_LockBootMemory function 5-2273
PLIB_NVM_LockProgramFlashMemory function 5-2274
PLIB_NVM_LowVoltageEventIsActive function 5-2259
PLIB_NVM_LowVoltageIsDetected function 5-2259
PLIB_NVM_MemoryModifyEnable function 5-2260
PLIB_NVM_MemoryModifyInhibit function 5-2260
PLIB_NVM_MemoryOperationSelect function 5-2261
PLIB_NVM_ProgramFlashBank1LowerRegion function 5-2270
PLIB_NVM_ProgramFlashBank2LowerRegion function 5-2270
PLIB_NVM_StopInIdleDisable function 5-2261
PLIB_NVM_StopInIdleEnable function 5-2262
PLIB_NVM_WriteOperationHasTerminated function 5-2262
plib_oc.h 5-2328
PLIB_OC_AlternateClockDisable function 5-2306
PLIB_OC_AlternateClockEnable function 5-2307
PLIB_OC_Buffer16BitSet function 5-2299
PLIB_OC_Buffer32BitSet function 5-2299
PLIB_OC_BufferSizeSelect function 5-2300
PLIB_OC_Disable function 5-2296
PLIB_OC_Enable function 5-2297
PLIB_OC_ExistsAlternateClock function 5-2318
PLIB_OC_ExistsBufferSize function 5-2319
PLIB_OC_ExistsBufferValue function 5-2319
PLIB_OC_ExistsCompareModeSelect function 5-2320
PLIB_OC_ExistsEnableControl function 5-2320
PLIB_OC_ExistsFaultInput function 5-2321
PLIB_OC_ExistsFaultModeSelect function 5-2321
PLIB_OC_ExistsFaultOutSelect function 5-2322
PLIB_OC_ExistsFaultStatus function 5-2322
PLIB_OC_ExistsFaultTristateSelect function 5-2323
PLIB_OC_ExistsPolarityInvert function 5-2323
9 MPLAB Harmony Help
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PLIB_OC_ExistsPulseWidth function 5-2324
PLIB_OC_ExistsPWMDutyCycleResolutionControl function
5-2324
PLIB_OC_ExistsStopInIdle function 5-2325
PLIB_OC_ExistsSyncModeSelect function 5-2325
PLIB_OC_ExistsSyncSourceSelect function 5-2326
PLIB_OC_ExistsTimerSelect function 5-2326
PLIB_OC_ExistsTimerTriggered function 5-2327
PLIB_OC_ExistsTriggerControl function 5-2327
PLIB_OC_ExistsTriggerStatusModeSelect function 5-2328
PLIB_OC_FaultHasOccurred function 5-2309
PLIB_OC_FaultInputSelect function 5-2309
PLIB_OC_FaultModeSelect function 5-2310
PLIB_OC_FaultOutSelect function 5-2310
PLIB_OC_FaultTristateSelect function 5-2311
PLIB_OC_IsTriggered function 5-2302
PLIB_OC_ModeSelect function 5-2297
PLIB_OC_PolarityInvertedDisable function 5-2298
PLIB_OC_PolarityInvertedEnable function 5-2298
PLIB_OC_PulseWidth16BitSet function 5-2301
PLIB_OC_PulseWidth32BitSet function 5-2301
PLIB_OC_PWMDutyCycleResolutionSet function 5-2302
PLIB_OC_StopInIdleDisable function 5-2307
PLIB_OC_StopInIdleEnable function 5-2308
PLIB_OC_SyncModeSelect function 5-2303
PLIB_OC_SyncSourceSelect function 5-2304
PLIB_OC_TimerSelect function 5-2304
PLIB_OC_TriggerClear function 5-2305
PLIB_OC_TriggerSet function 5-2305
PLIB_OC_TriggerStatusModeSelect function 5-2306
plib_osc.h 5-2423
PLIB_OSC_AuxClockSourceGet function 5-2347
PLIB_OSC_AuxClockSourceSet function 5-2347
PLIB_OSC_AuxModeGet function 5-2348
PLIB_OSC_AuxModeSelect function 5-2348
PLIB_OSC_ClockHasFailed function 5-2392
PLIB_OSC_ClockSwitchingAbort function 5-2365
PLIB_OSC_ClockSwitchingIsComplete function 5-2366
PLIB_OSC_CurrentSysClockGet function 5-2366
PLIB_OSC_DozeModeDisable function 5-2368
PLIB_OSC_DozeModeEnable function 5-2368
PLIB_OSC_DozeRatioGet function 5-2369
PLIB_OSC_DozeRatioSelect function 5-2369
PLIB_OSC_DozeRecoverOnInterruptDisable function 5-2370
PLIB_OSC_DozeRecoverOnInterruptEnable function 5-2370
PLIB_OSC_DozeRecoverOnInterruptIsEnabled function 5-2371
PLIB_OSC_ExistsClockFail function 5-2408
PLIB_OSC_ExistsFRCDivisor function 5-2408
PLIB_OSC_ExistsFRCTuning function 5-2409
PLIB_OSC_ExistsOnWaitAction function 5-2409
PLIB_OSC_ExistsOscCurrentGet function 5-2410
PLIB_OSC_ExistsOscSelect function 5-2410
PLIB_OSC_ExistsOscSwitchInit function 5-2411
PLIB_OSC_ExistsPBClockDivisor function 5-2411
PLIB_OSC_ExistsPBClockOutputEnable function 5-2412
PLIB_OSC_ExistsPBClockReady function 5-2412
PLIB_OSC_ExistsPLLClockLock function 5-2413
PLIB_OSC_ExistsPLLLockStatus function 5-2413
PLIB_OSC_ExistsReferenceOscBaseClock function 5-2414
PLIB_OSC_ExistsReferenceOscChange function 5-2414
PLIB_OSC_ExistsReferenceOscChangeActive function 5-2415
PLIB_OSC_ExistsReferenceOscDivisor function 5-2415
PLIB_OSC_ExistsReferenceOscEnable function 5-2416
PLIB_OSC_ExistsReferenceOscStopInIdleEnable function
5-2416
PLIB_OSC_ExistsReferenceOscStopInSleep function 5-2417
PLIB_OSC_ExistsReferenceOscTrim function 5-2417
PLIB_OSC_ExistsReferenceOutputEnable function 5-2418
PLIB_OSC_ExistsSecondaryEnable function 5-2419
PLIB_OSC_ExistsSecondaryReady function 5-2419
PLIB_OSC_ExistsSysPLLFrequencyRange function 5-2420
PLIB_OSC_ExistsSysPLLInputClockSource function 5-2420
PLIB_OSC_ExistsSysPLLInputDivisor function 5-2421
PLIB_OSC_ExistsSysPLLMultiplier function 5-2421
PLIB_OSC_ExistsSysPLLOutputDivisor function 5-2422
PLIB_OSC_ExistsUsbClockSource function 5-2422
PLIB_OSC_FRCDitherEnable function 5-2359
PLIB_OSC_FRCDivisorGet function 5-2360
PLIB_OSC_FRCDivisorSelect function 5-2360
PLIB_OSC_FRCTuningModeGet function 5-2361
9 MPLAB Harmony Help
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PLIB_OSC_FRCTuningModeSet function 5-2361
PLIB_OSC_FRCTuningSelect function 5-2362
PLIB_OSC_FRCTuningSequenceValueGet function 5-2362
PLIB_OSC_FRCTuningSequenceValueSet function 5-2363
PLIB_OSC_GraphicsClockDivisorGet function 5-2371
PLIB_OSC_GraphicsClockDivisorSet function 5-2372
PLIB_OSC_GraphicsClockSourceGet function 5-2372
PLIB_OSC_GraphicsClockSourceSelect function 5-2373
PLIB_OSC_LinearFeedbackShiftRegGet function 5-2364
PLIB_OSC_LinearFeedbackShiftRegSet function 5-2365
PLIB_OSC_OnWaitActionGet function 5-2342
PLIB_OSC_OnWaitActionSet function 5-2342
PLIB_OSC_PBClockDivisorGet function 5-2388
PLIB_OSC_PBClockDivisorIsReady function 5-2389
PLIB_OSC_PBClockDivisorSet function 5-2390
PLIB_OSC_PBOutputClockDisable function 5-2390
PLIB_OSC_PBOutputClockEnable function 5-2391
PLIB_OSC_PBOutputClockIsEnabled function 5-2391
PLIB_OSC_PLLAuxClockSourceGet function 5-2374
PLIB_OSC_PLLAuxClockSourceSelect function 5-2375
PLIB_OSC_PLLAuxInputDivisorGet function 5-2375
PLIB_OSC_PLLAuxInputDivisorSelect function 5-2376
PLIB_OSC_PLLAuxIsLocked function 5-2376
PLIB_OSC_PLLAuxMultiplierGet function 5-2377
PLIB_OSC_PLLAuxMultiplierSelect function 5-2378
PLIB_OSC_PLLAuxOutputDivisorGet function 5-2378
PLIB_OSC_PLLAuxOutputDivisorSet function 5-2379
PLIB_OSC_PLLClockIsLocked function 5-2379
PLIB_OSC_PLLClockLock function 5-2380
PLIB_OSC_PLLClockUnlock function 5-2380
PLIB_OSC_PLLDisable function 5-2381
PLIB_OSC_PLLEnable function 5-2381
PLIB_OSC_PLLIsEnabled function 5-2382
PLIB_OSC_PLLIsLocked function 5-2382
PLIB_OSC_PrimaryOscInSleepModeDisable function 5-2343
PLIB_OSC_PrimaryOscInSleepModeEnable function 5-2344
PLIB_OSC_PrimaryOscInSleepModeIsEnabled function 5-2344
PLIB_OSC_ReferenceOscBaseClockSelect function 5-2349
PLIB_OSC_ReferenceOscDisable function 5-2350
PLIB_OSC_ReferenceOscDivisorValueSet function 5-2350
PLIB_OSC_ReferenceOscEnable function 5-2351
PLIB_OSC_ReferenceOscIsEnabled function 5-2351
PLIB_OSC_ReferenceOscSourceChangeIsActive function
5-2352
PLIB_OSC_ReferenceOscStopInIdleDisable function 5-2353
PLIB_OSC_ReferenceOscStopInIdleEnable function 5-2353
PLIB_OSC_ReferenceOscStopInIdleIsEnabled function 5-2354
PLIB_OSC_ReferenceOscStopInSleepDisable function 5-2354
PLIB_OSC_ReferenceOscStopInSleepEnable function 5-2355
PLIB_OSC_ReferenceOscStopInSleepIsEnabled function
5-2356
PLIB_OSC_ReferenceOscSwitchIsComplete function 5-2356
PLIB_OSC_ReferenceOscTrimSet function 5-2357
PLIB_OSC_ReferenceOutputDisable function 5-2357
PLIB_OSC_ReferenceOutputEnable function 5-2358
PLIB_OSC_ReferenceOutputIsEnabled function 5-2358
PLIB_OSC_SecondaryDisable function 5-2345
PLIB_OSC_SecondaryEnable function 5-2345
PLIB_OSC_SecondaryIsEnabled function 5-2346
PLIB_OSC_SecondaryIsReady function 5-2346
PLIB_OSC_StartupTimerHasExpired function 5-2343
PLIB_OSC_SysClockSelect function 5-2367
PLIB_OSC_SysPLLFrequencyRangeGet function 5-2383
PLIB_OSC_SysPLLFrequencyRangeSet function 5-2383
PLIB_OSC_SysPLLInputClockSourceGet function 5-2384
PLIB_OSC_SysPLLInputClockSourceSet function 5-2384
PLIB_OSC_SysPLLInputDivisorGet function 5-2385
PLIB_OSC_SysPLLInputDivisorSet function 5-2386
PLIB_OSC_SysPLLMultiplierGet function 5-2386
PLIB_OSC_SysPLLMultiplierSelect function 5-2387
PLIB_OSC_SysPLLOutputDivisorGet function 5-2387
PLIB_OSC_SysPLLOutputDivisorSet function 5-2388
PLIB_OSC_UsbClockSourceGet function 5-2373
PLIB_OSC_UsbClockSourceSelect function 5-2374
plib_pcache.h 5-2475
PLIB_PCACHE_CacheHitRead function 5-2452
PLIB_PCACHE_CacheHitWrite function 5-2452
PLIB_PCACHE_CacheLineAddrGet function 5-2441
PLIB_PCACHE_CacheLineAddrSet function 5-2441
9 MPLAB Harmony Help
ddd
PLIB_PCACHE_CacheLineData function 5-2442
PLIB_PCACHE_CacheLineDeselect function 5-2442
PLIB_PCACHE_CacheLineFlashTypeBoot function 5-2443
PLIB_PCACHE_CacheLineFlashTypeInst function 5-2443
PLIB_PCACHE_CacheLineFlashTypeIsInst function 5-2444
PLIB_PCACHE_CacheLineInst function 5-2444
PLIB_PCACHE_CacheLineInvalid function 5-2445
PLIB_PCACHE_CacheLineIsInst function 5-2445
PLIB_PCACHE_CacheLineIsLocked function 5-2446
PLIB_PCACHE_CacheLineIsValid function 5-2447
PLIB_PCACHE_CacheLineLock function 5-2447
PLIB_PCACHE_CacheLineMaskGet function 5-2448
PLIB_PCACHE_CacheLineMaskSet function 5-2448
PLIB_PCACHE_CacheLineSelect function 5-2449
PLIB_PCACHE_CacheLineUnlock function 5-2449
PLIB_PCACHE_CacheLineValid function 5-2450
PLIB_PCACHE_CacheMissRead function 5-2453
PLIB_PCACHE_CacheMissWrite function 5-2453
PLIB_PCACHE_DATA_ENABLE enumeration 5-2463
PLIB_PCACHE_DataCacheEnableGet function 5-2437
PLIB_PCACHE_DataCacheEnableSet function 5-2438
PLIB_PCACHE_ExistsCacheHit function 5-2464
PLIB_PCACHE_ExistsCacheLine function 5-2465
PLIB_PCACHE_ExistsCacheLineAddr function 5-2465
PLIB_PCACHE_ExistsCacheLineFlashType function 5-2466
PLIB_PCACHE_ExistsCacheLineLock function 5-2466
PLIB_PCACHE_ExistsCacheLineMask function 5-2467
PLIB_PCACHE_ExistsCacheLineType function 5-2467
PLIB_PCACHE_ExistsCacheLineValid function 5-2468
PLIB_PCACHE_ExistsCacheMiss function 5-2468
PLIB_PCACHE_ExistsDataCacheEnable function 5-2469
PLIB_PCACHE_ExistsFlashDEDStatus function 5-2470
PLIB_PCACHE_ExistsFlashSECCount function 5-2470
PLIB_PCACHE_ExistsFlashSECInt function 5-2471
PLIB_PCACHE_ExistsFlashSECStatus function 5-2471
PLIB_PCACHE_ExistsInvalidateOnPFMProgram function
5-2472
PLIB_PCACHE_ExistsLeastRecentlyUsedState function 5-2472
PLIB_PCACHE_ExistsPrefetchAbort function 5-2473
PLIB_PCACHE_ExistsPrefetchEnable function 5-2473
PLIB_PCACHE_ExistsWaitState function 5-2474
PLIB_PCACHE_ExistsWord function 5-2474
PLIB_PCACHE_FlashDEDStatusClear function 5-2457
PLIB_PCACHE_FlashDEDStatusGet function 5-2457
PLIB_PCACHE_FlashSECCountGet function 5-2458
PLIB_PCACHE_FlashSECCountSet function 5-2458
PLIB_PCACHE_FlashSECIntDisable function 5-2459
PLIB_PCACHE_FlashSECIntEnable function 5-2460
PLIB_PCACHE_FlashSECStatusClear function 5-2460
PLIB_PCACHE_FlashSECStatusGet function 5-2461
PLIB_PCACHE_FlashSECStatusSet function 5-2461
PLIB_PCACHE_InvalidateOnPFMProgramAll function 5-2438
PLIB_PCACHE_InvalidateOnPFMProgramUnlocked function
5-2439
PLIB_PCACHE_LeastRecentlyUsedStateRead function 5-2454
PLIB_PCACHE_MAX_SEC_COUNT macro 5-2462
PLIB_PCACHE_NUM_LINES macro 5-2462
PLIB_PCACHE_NUM_WORDS_PER_LINE macro 5-2462
PLIB_PCACHE_PREFETCH_ENABLE enumeration 5-2463
PLIB_PCACHE_PrefetchAbortRead function 5-2456
PLIB_PCACHE_PrefetchAbortWrite function 5-2456
PLIB_PCACHE_PrefetchEnableGet function 5-2454
PLIB_PCACHE_PrefetchEnableSet function 5-2455
PLIB_PCACHE_WaitStateGet function 5-2439
PLIB_PCACHE_WaitStateSet function 5-2440
PLIB_PCACHE_WordRead function 5-2450
PLIB_PCACHE_WordWrite function 5-2451
plib_pmp.h 5-2588
PLIB_PMP_AddressGet function 5-2531
PLIB_PMP_AddressIncrementModeGet function 5-2494
PLIB_PMP_AddressIncrementModeSelect function 5-2495
PLIB_PMP_AddressLatchPolaritySelect function 5-2540
PLIB_PMP_AddressLatchStrobeDisable function 5-2496
PLIB_PMP_AddressLatchStrobeEnable function 5-2496
PLIB_PMP_AddressLinesA0A1Get function 5-2532
PLIB_PMP_AddressLinesA0A1Set function 5-2532
PLIB_PMP_AddressPortDisable function 5-2535
PLIB_PMP_AddressPortEnable function 5-2535
PLIB_PMP_AddressSet function 5-2533
PLIB_PMP_AlternateMasterHasAccess function 5-2513
9 MPLAB Harmony Help
eee
PLIB_PMP_AlternateMasterRequestStatus function 5-2514
PLIB_PMP_BusKeeperDisable function 5-2506
PLIB_PMP_BusKeeperEnable function 5-2506
PLIB_PMP_ByteEnablePolaritySelect function 5-2541
PLIB_PMP_ByteEnablePortDisable function 5-2536
PLIB_PMP_ByteEnablePortEnable function 5-2537
PLIB_PMP_ChipSelectFunctionSelect function 5-2497
PLIB_PMP_ChipSelectXAckPolaritySelect function 5-2543
PLIB_PMP_ChipSelectXByteEnablePortPolaritySelect function
5-2544
PLIB_PMP_ChipSelectXDisable function 5-2497
PLIB_PMP_ChipSelectXEnable function 5-2498
PLIB_PMP_ChipSelectXEnableStrobeDeSelect function 5-2507
PLIB_PMP_ChipSelectXEnableStrobeSelect function 5-2508
PLIB_PMP_ChipSelectXIsActive function 5-2499
PLIB_PMP_ChipSelectXPolaritySelect function 5-2542
PLIB_PMP_ChipSelectXPortDisable function 5-2539
PLIB_PMP_ChipSelectXPortEnable function 5-2540
PLIB_PMP_ChipSelectXReadWriteStrobePolaritySelect
function 5-2545
PLIB_PMP_ChipSelectXWriteEnableStrobePolaritySelect
function 5-2545
PLIB_PMP_ChipXAckModeSelect function 5-2509
PLIB_PMP_ChipXBaseAddressSet function 5-2534
PLIB_PMP_ChipXDataSizeSelect function 5-2510
PLIB_PMP_ChipXWaitStatesAlternateMasterSelect function
5-2527
PLIB_PMP_ChipXWaitStatesDataHoldSelect function 5-2528
PLIB_PMP_ChipXWaitStatesDataSetupSelect function 5-2529
PLIB_PMP_ChipXWaitStatesStrobeSelect function 5-2529
PLIB_PMP_DataSizeSelect function 5-2499
PLIB_PMP_Disable function 5-2500
PLIB_PMP_Enable function 5-2500
PLIB_PMP_EnhancedMasterModeSelect function 5-2510
PLIB_PMP_ExistsAddressControl function 5-2557
PLIB_PMP_ExistsAddressLatchPolarity function 5-2557
PLIB_PMP_ExistsAddressLatchStrobePortControl function
5-2558
PLIB_PMP_ExistsAddressPortPinControl function 5-2558
PLIB_PMP_ExistsAltMasterRequest function 5-2559
PLIB_PMP_ExistsBufferOverFlow function 5-2560
PLIB_PMP_ExistsBufferRead function 5-2560
PLIB_PMP_ExistsBufferType function 5-2561
PLIB_PMP_ExistsBufferUnderFlow function 5-2561
PLIB_PMP_ExistsBufferWrite function 5-2562
PLIB_PMP_ExistsBusKeeper function 5-2562
PLIB_PMP_ExistsBusyStatus function 5-2563
PLIB_PMP_ExistsByteEnablePolarity function 5-2563
PLIB_PMP_ExistsByteEnablePortControl function 5-2564
PLIB_PMP_ExistsChipSelectEnable function 5-2564
PLIB_PMP_ExistsChipSelectoperation function 5-2565
PLIB_PMP_ExistsChipXACKMode function 5-2565
PLIB_PMP_ExistsChipXACKPolarity function 5-2566
PLIB_PMP_ExistsChipXAltMasterWaitStates function 5-2566
PLIB_PMP_ExistsChipXBaseAddress function 5-2567
PLIB_PMP_ExistsChipXByteEnablePolarity function 5-2567
PLIB_PMP_ExistsChipXDataHoldWaitStates function 5-2568
PLIB_PMP_ExistsChipXDataSetupWaitStates function 5-2568
PLIB_PMP_ExistsChipXDataSize function 5-2569
PLIB_PMP_ExistsChipXEnableStorbeSelect function 5-2569
PLIB_PMP_ExistsChipXPolarity function 5-2570
PLIB_PMP_ExistsChipXReadWritePolarity function 5-2570
PLIB_PMP_ExistsChipXStrobeWaitStates function 5-2571
PLIB_PMP_ExistsChipXWriteEnablePolarity function 5-2571
PLIB_PMP_ExistsCSXActiveStatus function 5-2572
PLIB_PMP_ExistsCSXPortControl function 5-2572
PLIB_PMP_ExistsCurrentMaster function 5-2573
PLIB_PMP_ExistsDataHoldWaitStates function 5-2573
PLIB_PMP_ExistsDataSetUpWaitStates function 5-2574
PLIB_PMP_ExistsDataStrobeWaitStates function 5-2574
PLIB_PMP_ExistsDataTransferSize function 5-2575
PLIB_PMP_ExistsEnableControl function 5-2575
PLIB_PMP_ExistsEnhancedMasterMode function 5-2576
PLIB_PMP_ExistsIncrementMode function 5-2576
PLIB_PMP_ExistsInputBufferFull function 5-2577
PLIB_PMP_ExistsInputBufferXStatus function 5-2577
PLIB_PMP_ExistsInterruptMode function 5-2578
PLIB_PMP_ExistsMasterRXTX function 5-2578
PLIB_PMP_ExistsMUXModeSelect function 5-2579
PLIB_PMP_ExistsOperationMode function 5-2579
9 MPLAB Harmony Help
fff
PLIB_PMP_ExistsOutPutBufferEmpty function 5-2580
PLIB_PMP_ExistsOutputBufferXStatus function 5-2580
PLIB_PMP_ExistsReadWritePolarity function 5-2581
PLIB_PMP_ExistsReadWriteStrobePortControl function 5-2581
PLIB_PMP_ExistsReservedAddrSpace function 5-2582
PLIB_PMP_ExistsSlaveRX function 5-2582
PLIB_PMP_ExistsSlaveTX function 5-2583
PLIB_PMP_ExistsSmartAddress function 5-2583
PLIB_PMP_ExistsStopInIdleControl function 5-2584
PLIB_PMP_ExistsTransactionError function 5-2584
PLIB_PMP_ExistsTransactionTimeOut function 5-2585
PLIB_PMP_ExistsWaitStatesAddrHoldStrobe function 5-2585
PLIB_PMP_ExistsWaitStatesAddrLatchStrobe function 5-2586
PLIB_PMP_ExistsWriteEnablePolarity function 5-2586
PLIB_PMP_ExistsWriteEnablePortControl function 5-2587
PLIB_PMP_InputBuffersAreFull function 5-2518
PLIB_PMP_InputBufferTypeSelect function 5-2501
PLIB_PMP_InputBufferXByteReceive function 5-2519
PLIB_PMP_InputBufferXIsFull function 5-2519
PLIB_PMP_InputOverflowClear function 5-2515
PLIB_PMP_InputOverflowHasOccurred function 5-2512
PLIB_PMP_InterruptModeGet function 5-2502
PLIB_PMP_InterruptModeSelect function 5-2502
PLIB_PMP_IsDataReceived function 5-2520
PLIB_PMP_IsDataTransmitted function 5-2521
PLIB_PMP_IsEnabled function 5-2511
PLIB_PMP_MasterReceive function 5-2521
PLIB_PMP_MasterSend function 5-2522
PLIB_PMP_MultiplexModeGet function 5-2503
PLIB_PMP_MultiplexModeSelect function 5-2503
PLIB_PMP_OperationModeGet function 5-2504
PLIB_PMP_OperationModeSelect function 5-2504
PLIB_PMP_OutputBuffersAreEmpty function 5-2522
PLIB_PMP_OutputBufferXByteSend function 5-2523
PLIB_PMP_OutputBufferXIsEmpty function 5-2524
PLIB_PMP_OutputUnderflowClear function 5-2515
PLIB_PMP_OutputUnderflowHasOccurred function 5-2513
PLIB_PMP_PortIsBusy function 5-2512
PLIB_PMP_ReadWriteStrobePolaritySelect function 5-2542
PLIB_PMP_ReadWriteStrobePortDisable function 5-2537
PLIB_PMP_ReadWriteStrobePortEnable function 5-2538
PLIB_PMP_ReservedAddressSpaceBitsSet function 5-2534
PLIB_PMP_SlaveReceive function 5-2524
PLIB_PMP_SlaveSend function 5-2525
PLIB_PMP_SmartAddressStrobeDisable function 5-2508
PLIB_PMP_SmartAddressStrobeEnable function 5-2509
PLIB_PMP_StopInIdleDisable function 5-2505
PLIB_PMP_StopInIdleEnable function 5-2505
PLIB_PMP_TransactionErrorClear function 5-2516
PLIB_PMP_TransactionErrorHasOccurred function 5-2516
PLIB_PMP_TransactionHasTimedOut function 5-2517
PLIB_PMP_TransactionTimeoutClear function 5-2517
PLIB_PMP_WaitStatesAddressHoldStrobeSelect function
5-2530
PLIB_PMP_WaitStatesAddressLatchStrobeSelect function
5-2531
PLIB_PMP_WaitStatesDataHoldSelect function 5-2526
PLIB_PMP_WaitStatesDataSetUpSelect function 5-2526
PLIB_PMP_WaitStatesStrobeSelect function 5-2527
PLIB_PMP_WriteEnableStrobePolaritySelect function 5-2543
PLIB_PMP_WriteEnableStrobePortDisable function 5-2538
PLIB_PMP_WriteEnableStrobePortEnable function 5-2539
plib_ports.h 5-2659
PLIB_PORTS_ChangeNoticeDisable function 5-2618
PLIB_PORTS_ChangeNoticeEnable function 5-2618
PLIB_PORTS_ChangeNoticeInIdleDisable function 5-2619
PLIB_PORTS_ChangeNoticeInIdleEnable function 5-2619
PLIB_PORTS_ChangeNoticeInIdlePerPortDisable function
5-2620
PLIB_PORTS_ChangeNoticeInIdlePerPortEnable function
5-2620
PLIB_PORTS_ChangeNoticePerPortHasOccured function
5-2621
PLIB_PORTS_ChangeNoticePerPortTurnOff function 5-2622
PLIB_PORTS_ChangeNoticePerPortTurnOn function 5-2622
PLIB_PORTS_ChangeNoticePullDownPerPortDisable function
5-2623
PLIB_PORTS_ChangeNoticePullDownPerPortEnable function
5-2624
PLIB_PORTS_ChangeNoticePullUpDisable function 5-2624
PLIB_PORTS_ChangeNoticePullUpEnable function 5-2625
9 MPLAB Harmony Help
ggg
PLIB_PORTS_ChangeNoticePullUpPerPortDisable function
5-2625
PLIB_PORTS_ChangeNoticePullUpPerPortEnable function
5-2626
PLIB_PORTS_Clear function 5-2609
PLIB_PORTS_DirectionGet function 5-2610
PLIB_PORTS_DirectionInputSet function 5-2610
PLIB_PORTS_DirectionOutputSet function 5-2611
PLIB_PORTS_ExistsChangeNotice function 5-2650
PLIB_PORTS_ExistsChangeNoticeInIdle function 5-2650
PLIB_PORTS_ExistsChangeNoticePerPortInIdle function
5-2651
PLIB_PORTS_ExistsChangeNoticePerPortStatus function
5-2651
PLIB_PORTS_ExistsChangeNoticePerPortTurnOn function
5-2652
PLIB_PORTS_ExistsChangeNoticePullDownPerPort function
5-2652
PLIB_PORTS_ExistsChangeNoticePullUp function 5-2653
PLIB_PORTS_ExistsChangeNoticePullUpPerPort function
5-2653
PLIB_PORTS_ExistsPinChangeNotice function 5-2654
PLIB_PORTS_ExistsPinChangeNoticePerPort function 5-2654
PLIB_PORTS_ExistsPinMode function 5-2655
PLIB_PORTS_ExistsPinModePerPort function 5-2655
PLIB_PORTS_ExistsPortsDirection function 5-2656
PLIB_PORTS_ExistsPortsOpenDrain function 5-2656
PLIB_PORTS_ExistsPortsRead function 5-2657
PLIB_PORTS_ExistsPortsWrite function 5-2658
PLIB_PORTS_ExistsRemapInput function 5-2658
PLIB_PORTS_ExistsRemapOutput function 5-2659
PLIB_PORTS_OpenDrainDisable function 5-2615
PLIB_PORTS_OpenDrainEnable function 5-2616
PLIB_PORTS_PinChangeNoticeDisable function 5-2627
PLIB_PORTS_PinChangeNoticeEnable function 5-2627
PLIB_PORTS_PinChangeNoticePerPortDisable function 5-2628
PLIB_PORTS_PinChangeNoticePerPortEnable function 5-2628
PLIB_PORTS_PinClear function 5-2603
PLIB_PORTS_PinDirectionInputSet function 5-2604
PLIB_PORTS_PinDirectionOutputSet function 5-2605
PLIB_PORTS_PinGet function 5-2605
PLIB_PORTS_PinModePerPortSelect function 5-2608
PLIB_PORTS_PinModeSelect function 5-2606
PLIB_PORTS_PinOpenDrainDisable function 5-2611
PLIB_PORTS_PinOpenDrainEnable function 5-2612
PLIB_PORTS_PinSet function 5-2606
PLIB_PORTS_PinToggle function 5-2607
PLIB_PORTS_PinWrite function 5-2608
PLIB_PORTS_Read function 5-2613
PLIB_PORTS_RemapInput function 5-2616
PLIB_PORTS_RemapOutput function 5-2617
PLIB_PORTS_Set function 5-2613
PLIB_PORTS_Toggle function 5-2614
PLIB_PORTS_Write function 5-2614
plib_power.h 5-2686
PLIB_POWER_ClearIdleStatus function 5-2672
PLIB_POWER_ClearSleepStatus function 5-2673
PLIB_POWER_DeepSleepBORDisable function 5-2668
PLIB_POWER_DeepSleepBOREnable function 5-2668
PLIB_POWER_DeepSleepFaultDetectStatus function 5-2673
PLIB_POWER_DeepSleepInterruptOnChangeStatus function
5-2674
PLIB_POWER_DeepSleepMCLREventStatus function 5-2675
PLIB_POWER_DeepSleepModeDisable function 5-2669
PLIB_POWER_DeepSleepModeEnable function 5-2669
PLIB_POWER_DeepSleepPowerOnResetStatus function
5-2675
PLIB_POWER_DeviceWasInIdleMode function 5-2676
PLIB_POWER_DeviceWasInSleepMode function 5-2676
PLIB_POWER_ExistsDeepSleepBOR function 5-2681
PLIB_POWER_ExistsDeepSleepFaultDetect function 5-2681
PLIB_POWER_ExistsDeepSleepInterruptOnChange function
5-2682
PLIB_POWER_ExistsDeepSleepMCLREvent function 5-2682
PLIB_POWER_ExistsDeepSleepMode function 5-2683
PLIB_POWER_ExistsDeepSleepPowerOnReset function 5-2683
PLIB_POWER_ExistsIdleStatus function 5-2684
PLIB_POWER_ExistsPeripheralModuleControl function 5-2684
PLIB_POWER_ExistsSleepStatus function 5-2685
PLIB_POWER_ExistsVoltageRegulatorControl function 5-2685
PLIB_POWER_PeripheralModuleDisable function 5-2670
PLIB_POWER_PeripheralModuleEnable function 5-2670
9 MPLAB Harmony Help
hhh
PLIB_POWER_PeripheralModuleIsEnabled function 5-2671
PLIB_POWER_VoltageRegulatorDisable function 5-2671
PLIB_POWER_VoltageRegulatorEnable function 5-2672
PLIB_POWER_VoltageRegulatorIsEnabled function 5-2677
plib_reset.h 5-2702
PLIB_RESET_ConfigRegReadErrorGet function 5-2693
PLIB_RESET_ExistsConfigRegReadError function 5-2697
PLIB_RESET_ExistsNmiControl function 5-2698
PLIB_RESET_ExistsNmiCounter function 5-2698
PLIB_RESET_ExistsResetReasonStatus function 5-2696
PLIB_RESET_ExistsSoftwareResetTrigger function 5-2697
PLIB_RESET_ExistsWdtoInSleep function 5-2699
PLIB_RESET_NmiCounterValueGet function 5-2699
PLIB_RESET_NmiCounterValueSet function 5-2700
PLIB_RESET_NmiEventClear function 5-2701
PLIB_RESET_NmiEventTrigger function 5-2701
PLIB_RESET_NmiReasonGet function 5-2702
PLIB_RESET_ReasonClear function 5-2692
PLIB_RESET_ReasonGet function 5-2692
PLIB_RESET_SoftwareResetEnable function 5-2691
PLIB_RESET_WdtTimeOutHasOccurredInSleep function
5-2693
plib_rtcc.h 5-2759
PLIB_RTCC_AlarmChimeDisable function 5-2729
PLIB_RTCC_AlarmChimeEnable function 5-2729
PLIB_RTCC_AlarmDateGet function 5-2730
PLIB_RTCC_AlarmDateSet function 5-2730
PLIB_RTCC_AlarmDayGet function 5-2731
PLIB_RTCC_AlarmDaySet function 5-2731
PLIB_RTCC_AlarmDisable function 5-2732
PLIB_RTCC_AlarmEnable function 5-2732
PLIB_RTCC_AlarmHourGet function 5-2733
PLIB_RTCC_AlarmHourSet function 5-2734
PLIB_RTCC_AlarmMaskModeSelect function 5-2734
PLIB_RTCC_AlarmMinuteGet function 5-2735
PLIB_RTCC_AlarmMinuteSet function 5-2735
PLIB_RTCC_AlarmMonthGet function 5-2736
PLIB_RTCC_AlarmMonthSet function 5-2736
PLIB_RTCC_AlarmPulseInitialGet function 5-2737
PLIB_RTCC_AlarmPulseInitialSet function 5-2737
PLIB_RTCC_AlarmRepeatCountGet function 5-2738
PLIB_RTCC_AlarmRepeatCountSet function 5-2739
PLIB_RTCC_AlarmSecondGet function 5-2739
PLIB_RTCC_AlarmSecondSet function 5-2740
PLIB_RTCC_AlarmTimeGet function 5-2740
PLIB_RTCC_AlarmTimeSet function 5-2741
PLIB_RTCC_AlarmValueRegisterPointer function 5-2741
PLIB_RTCC_AlarmWeekDayGet function 5-2742
PLIB_RTCC_AlarmWeekDaySet function 5-2742
PLIB_RTCC_ClockOutputDisable function 5-2715
PLIB_RTCC_ClockOutputEnable function 5-2716
PLIB_RTCC_ClockRunningStatus function 5-2716
PLIB_RTCC_ClockSourceSelect function 5-2743
PLIB_RTCC_Disable function 5-2717
PLIB_RTCC_DriftCalibrateGet function 5-2744
PLIB_RTCC_DriftCalibrateSet function 5-2744
PLIB_RTCC_Enable function 5-2717
PLIB_RTCC_ExistsAlarmChimeControl function 5-2749
PLIB_RTCC_ExistsAlarmControl function 5-2749
PLIB_RTCC_ExistsAlarmDate function 5-2750
PLIB_RTCC_ExistsAlarmMaskControl function 5-2750
PLIB_RTCC_ExistsAlarmPulseInitial function 5-2751
PLIB_RTCC_ExistsAlarmRepeatControl function 5-2751
PLIB_RTCC_ExistsAlarmSyncronization function 5-2752
PLIB_RTCC_ExistsAlarmTime function 5-2752
PLIB_RTCC_ExistsCalibration function 5-2753
PLIB_RTCC_ExistsClockRunning function 5-2753
PLIB_RTCC_ExistsClockSelect function 5-2754
PLIB_RTCC_ExistsEnableControl function 5-2754
PLIB_RTCC_ExistsHalfSecond function 5-2755
PLIB_RTCC_ExistsOutputControl function 5-2755
PLIB_RTCC_ExistsOutputSelect function 5-2756
PLIB_RTCC_ExistsRTCDate function 5-2756
PLIB_RTCC_ExistsRTCTime function 5-2757
PLIB_RTCC_ExistsStopInIdleControl function 5-2757
PLIB_RTCC_ExistsSynchronization function 5-2758
PLIB_RTCC_ExistsWriteEnable function 5-2758
PLIB_RTCC_HalfSecondStatusGet function 5-2745
PLIB_RTCC_OutputSelect function 5-2745
9 MPLAB Harmony Help
iii
PLIB_RTCC_RTCDateGet function 5-2719
PLIB_RTCC_RTCDateSet function 5-2719
PLIB_RTCC_RTCDayGet function 5-2720
PLIB_RTCC_RTCDaySet function 5-2720
PLIB_RTCC_RTCHourGet function 5-2721
PLIB_RTCC_RTCHourSet function 5-2722
PLIB_RTCC_RTCMinuteGet function 5-2722
PLIB_RTCC_RTCMinuteSet function 5-2723
PLIB_RTCC_RTCMonthGet function 5-2723
PLIB_RTCC_RTCMonthSet function 5-2724
PLIB_RTCC_RTCSecondGet function 5-2724
PLIB_RTCC_RTCSecondSet function 5-2725
PLIB_RTCC_RTCTimeGet function 5-2725
PLIB_RTCC_RTCTimeSet function 5-2726
PLIB_RTCC_RTCWeekDayGet function 5-2726
PLIB_RTCC_RTCWeekDaySet function 5-2727
PLIB_RTCC_RTCYearGet function 5-2727
PLIB_RTCC_RTCYearSet function 5-2728
PLIB_RTCC_StopInIdleDisable function 5-2746
PLIB_RTCC_StopInIdleEnable function 5-2746
PLIB_RTCC_WriteDisable function 5-2718
PLIB_RTCC_WriteEnable function 5-2718
plib_sb.h 5-2796
PLIB_SB_ARB_POLICY enumeration 5-2781
PLIB_SB_CPUPrioritySet function 5-2786
PLIB_SB_DMAPrioritySet function 5-2786
PLIB_SB_ERROR enumeration 5-2781
PLIB_SB_ExistsCPUPriority function 5-2788
PLIB_SB_ExistsDMAPriority function 5-2788
PLIB_SB_ExistsInitPermGrp function 5-2789
PLIB_SB_ExistsPGRegAddr function 5-2789
PLIB_SB_ExistsPGRegRdPerm function 5-2790
PLIB_SB_ExistsPGRegSize function 5-2790
PLIB_SB_ExistsPGRegWrPerm function 5-2791
PLIB_SB_ExistsPGVErrClear function 5-2791
PLIB_SB_ExistsPGVErrClrMulti function 5-2792
PLIB_SB_ExistsPGVErrClrSingle function 5-2793
PLIB_SB_ExistsPGVErrCmdCode function 5-2793
PLIB_SB_ExistsPGVErrInitID function 5-2794
PLIB_SB_ExistsPGVErrPG function 5-2794
PLIB_SB_ExistsPGVErrRegion function 5-2795
PLIB_SB_ExistsPGVErrRptPri function 5-2795
PLIB_SB_ExistsPGVErrStatus function 5-2796
PLIB_SB_INIT_ID enumeration 5-2781
PLIB_SB_INIT_PG enumeration 5-2782
PLIB_SB_InitPermGrpSet function 5-2787
PLIB_SB_OCP_CMD_CODE enumeration 5-2782
PLIB_SB_PG_INITIATOR enumeration 5-2782
PLIB_SB_PGRegionAddrGet function 5-2768
PLIB_SB_PGRegionAddrSet function 5-2769
PLIB_SB_PGRegionReadPermClear function 5-2770
PLIB_SB_PGRegionReadPermSet function 5-2770
PLIB_SB_PGRegionSizeGet function 5-2771
PLIB_SB_PGRegionSizeSet function 5-2771
PLIB_SB_PGRegionWritePermClear function 5-2772
PLIB_SB_PGRegionWritePermSet function 5-2773
PLIB_SB_PGVErrorClearMulti function 5-2773
PLIB_SB_PGVErrorClearSingle function 5-2774
PLIB_SB_PGVErrorCode function 5-2775
PLIB_SB_PGVErrorCommandCode function 5-2775
PLIB_SB_PGVErrorInitiatorID function 5-2776
PLIB_SB_PGVErrorLogClearMulti function 5-2776
PLIB_SB_PGVErrorLogClearSingle function 5-2777
PLIB_SB_PGVErrorMulti function 5-2777
PLIB_SB_PGVErrorPermissionGroup function 5-2778
PLIB_SB_PGVErrorRegion function 5-2778
PLIB_SB_PGVErrorReportPrimaryDisable function 5-2779
PLIB_SB_PGVErrorReportPrimaryEnable function 5-2779
PLIB_SB_PGVErrorStatus function 5-2780
PLIB_SB_REGION_PG enumeration 5-2783
PLIB_SB_TGT_ID enumeration 5-2783
PLIB_SB_TGT_REGION enumeration 5-2784
plib_spi.h 5-2888
PLIB_SPI_AudioCommunicationWidthSelect function 5-2850
PLIB_SPI_AudioErrorDisable function 5-2851
PLIB_SPI_AudioErrorEnable function 5-2851
PLIB_SPI_AudioProtocolDisable function 5-2852
PLIB_SPI_AudioProtocolEnable function 5-2852
9 MPLAB Harmony Help
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PLIB_SPI_AudioProtocolModeSelect function 5-2853
PLIB_SPI_AudioTransmitModeSelect function 5-2854
PLIB_SPI_BaudRateClockSelect function 5-2827
PLIB_SPI_BaudRateSet function 5-2828
PLIB_SPI_BufferClear function 5-2843
PLIB_SPI_BufferRead function 5-2844
PLIB_SPI_BufferWrite function 5-2844
PLIB_SPI_ClockPolaritySelect function 5-2829
PLIB_SPI_CommunicationWidthSelect function 5-2829
PLIB_SPI_Disable function 5-2830
PLIB_SPI_Enable function 5-2830
PLIB_SPI_ErrorInterruptDisable function 5-2831
PLIB_SPI_ErrorInterruptEnable function 5-2832
PLIB_SPI_ExistsAudioCommunicationWidth function 5-2868
PLIB_SPI_ExistsAudioErrorControl function 5-2868
PLIB_SPI_ExistsAudioProtocolControl function 5-2869
PLIB_SPI_ExistsAudioProtocolMode function 5-2869
PLIB_SPI_ExistsAudioTransmitMode function 5-2870
PLIB_SPI_ExistsBaudRate function 5-2870
PLIB_SPI_ExistsBaudRateClock function 5-2871
PLIB_SPI_ExistsBuffer function 5-2871
PLIB_SPI_ExistsBusStatus function 5-2872
PLIB_SPI_ExistsClockPolarity function 5-2872
PLIB_SPI_ExistsCommunicationWidth function 5-2873
PLIB_SPI_ExistsEnableControl function 5-2873
PLIB_SPI_ExistsErrorInterruptControl function 5-2874
PLIB_SPI_ExistsFIFOControl function 5-2874
PLIB_SPI_ExistsFIFOCount function 5-2875
PLIB_SPI_ExistsFIFOInterruptMode function 5-2875
PLIB_SPI_ExistsFIFOShiftRegisterEmptyStatus function 5-2876
PLIB_SPI_ExistsFramedCommunication function 5-2876
PLIB_SPI_ExistsFrameErrorStatus function 5-2877
PLIB_SPI_ExistsFrameSyncPulseCounter function 5-2877
PLIB_SPI_ExistsFrameSyncPulseDirection function 5-2878
PLIB_SPI_ExistsFrameSyncPulseEdge function 5-2878
PLIB_SPI_ExistsFrameSyncPulsePolarity function 5-2879
PLIB_SPI_ExistsFrameSyncPulseWidth function 5-2879
PLIB_SPI_ExistsInputSamplePhase function 5-2880
PLIB_SPI_ExistsMasterControl function 5-2880
PLIB_SPI_ExistsOutputDataPhase function 5-2881
PLIB_SPI_ExistsPinControl function 5-2881
PLIB_SPI_ExistsPrimaryPrescale function 5-2882
PLIB_SPI_ExistsReadDataSignStatus function 5-2882
PLIB_SPI_ExistsReceiveBufferStatus function 5-2883
PLIB_SPI_ExistsReceiveFIFOStatus function 5-2883
PLIB_SPI_ExistsReceiverOverflow function 5-2884
PLIB_SPI_ExistsSecondaryPrescale function 5-2884
PLIB_SPI_ExistsSlaveSelectControl function 5-2885
PLIB_SPI_ExistsStopInIdleControl function 5-2885
PLIB_SPI_ExistsTransmitBufferEmptyStatus function 5-2886
PLIB_SPI_ExistsTransmitBufferFullStatus function 5-2886
PLIB_SPI_ExistsTransmitUnderRunStatus function 5-2887
PLIB_SPI_FIFOCountGet function 5-2832
PLIB_SPI_FIFODisable function 5-2833
PLIB_SPI_FIFOEnable function 5-2833
PLIB_SPI_FIFOInterruptModeSelect function 5-2834
PLIB_SPI_FIFOShiftRegisterIsEmpty function 5-2835
PLIB_SPI_FramedCommunicationDisable function 5-2845
PLIB_SPI_FramedCommunicationEnable function 5-2846
PLIB_SPI_FrameErrorStatusGet function 5-2846
PLIB_SPI_FrameSyncPulseCounterSelect function 5-2847
PLIB_SPI_FrameSyncPulseDirectionSelect function 5-2847
PLIB_SPI_FrameSyncPulseEdgeSelect function 5-2848
PLIB_SPI_FrameSyncPulsePolaritySelect function 5-2849
PLIB_SPI_FrameSyncPulseWidthSelect function 5-2849
PLIB_SPI_InputSamplePhaseSelect function 5-2835
PLIB_SPI_IsBusy function 5-2836
PLIB_SPI_MasterEnable function 5-2836
PLIB_SPI_OutputDataPhaseSelect function 5-2837
PLIB_SPI_PinDisable function 5-2838
PLIB_SPI_PinEnable function 5-2838
PLIB_SPI_PrescalePrimarySelect function 5-2839
PLIB_SPI_PrescaleSecondarySelect function 5-2839
PLIB_SPI_ReadDataIsSignExtended function 5-2840
PLIB_SPI_ReceiverBufferIsFull function 5-2856
PLIB_SPI_ReceiverFIFOIsEmpty function 5-2857
PLIB_SPI_ReceiverHasOverflowed function 5-2857
PLIB_SPI_ReceiverOverflowClear function 5-2858
9 MPLAB Harmony Help
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PLIB_SPI_SlaveEnable function 5-2841
PLIB_SPI_SlaveSelectDisable function 5-2841
PLIB_SPI_SlaveSelectEnable function 5-2842
PLIB_SPI_StopInIdleDisable function 5-2842
PLIB_SPI_StopInIdleEnable function 5-2843
PLIB_SPI_TransmitBufferIsEmpty function 5-2854
PLIB_SPI_TransmitBufferIsFull function 5-2855
PLIB_SPI_TransmitUnderRunStatusGet function 5-2855
plib_sqi.h 5-3006
PLIB_SQI_BurstEnable function 5-2908
PLIB_SQI_ByteCountGet function 5-2937
PLIB_SQI_ByteCountSet function 5-2938
PLIB_SQI_ChipSelectDeassertDisable function 5-2938
PLIB_SQI_ChipSelectDeassertEnable function 5-2939
PLIB_SQI_ChipSelectGet function 5-2940
PLIB_SQI_ChipSelectSet function 5-2940
PLIB_SQI_ClockDisable function 5-2909
PLIB_SQI_ClockDividerGet function 5-2925
PLIB_SQI_ClockDividerSet function 5-2925
PLIB_SQI_ClockEnable function 5-2926
PLIB_SQI_ClockIsStable function 5-2926
PLIB_SQI_ConfigWordGet function 5-2941
PLIB_SQI_ConfigWordSet function 5-2941
PLIB_SQI_ControlBufferThresholdGet function 5-2909
PLIB_SQI_ControlBufferThresholdSet function 5-2910
PLIB_SQI_ControlWordGet function 5-2910
PLIB_SQI_ControlWordSet function 5-2911
PLIB_SQI_CSOutputEnableSelect function 5-2912
PLIB_SQI_DataFormatGet function 5-2912
PLIB_SQI_DataFormatSet function 5-2913
PLIB_SQI_DataLineStatus function 5-2949
PLIB_SQI_DataModeGet function 5-2913
PLIB_SQI_DataModeSet function 5-2914
PLIB_SQI_DataOutputEnableSelect function 5-2914
PLIB_SQI_Disable function 5-2915
PLIB_SQI_DMABDBaseAddressGet function 5-2954
PLIB_SQI_DMABDBaseAddressSet function 5-2955
PLIB_SQI_DMABDControlWordGet function 5-2956
PLIB_SQI_DMABDCurrentAddressGet function 5-2955
PLIB_SQI_DMABDFetchStart function 5-2960
PLIB_SQI_DMABDIsBusy function 5-2960
PLIB_SQI_DMABDPollCounterSet function 5-2961
PLIB_SQI_DMABDPollDisable function 5-2962
PLIB_SQI_DMABDPollEnable function 5-2962
PLIB_SQI_DMABDPollIsEnabled function 5-2963
PLIB_SQI_DMABDReceiveBufferCountGet function 5-2957
PLIB_SQI_DMABDReceiveBufferLengthGet function 5-2957
PLIB_SQI_DMABDReceiveStateGet function 5-2958
PLIB_SQI_DMABDStateGet function 5-2963
PLIB_SQI_DMABDTransmitBufferCountGet function 5-2958
PLIB_SQI_DMABDTransmitBufferLengthGet function 5-2959
PLIB_SQI_DMABDTransmitStateGet function 5-2959
PLIB_SQI_DMADisable function 5-2964
PLIB_SQI_DMAEnable function 5-2964
PLIB_SQI_DMAHasStarted function 5-2965
PLIB_SQI_DMAIsEnabled function 5-2965
PLIB_SQI_Enable function 5-2915
PLIB_SQI_ExistsBDBaseAddress function 5-2974
PLIB_SQI_ExistsBDControlWord function 5-2975
PLIB_SQI_ExistsBDCurrentAddress function 5-2975
PLIB_SQI_ExistsBDPollCount function 5-2976
PLIB_SQI_ExistsBDPollingEnable function 5-2976
PLIB_SQI_ExistsBDProcessState function 5-2977
PLIB_SQI_ExistsBDRxBufCount function 5-2977
PLIB_SQI_ExistsBDRxLength function 5-2978
PLIB_SQI_ExistsBDRxState function 5-2978
PLIB_SQI_ExistsBDTxBufCount function 5-2979
PLIB_SQI_ExistsBDTxLength function 5-2979
PLIB_SQI_ExistsBDTxState function 5-2980
PLIB_SQI_ExistsBurstControl function 5-2980
PLIB_SQI_ExistsChipSelect function 5-2981
PLIB_SQI_ExistsClockControl function 5-2981
PLIB_SQI_ExistsClockDivider function 5-2982
PLIB_SQI_ExistsClockReady function 5-2982
PLIB_SQI_ExistsConBufThreshold function 5-2983
PLIB_SQI_ExistsConfigWord function 5-2983
PLIB_SQI_ExistsControlWord function 5-2984
PLIB_SQI_ExistsCSDeassert function 5-2984
9 MPLAB Harmony Help
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PLIB_SQI_ExistsCSOutputEnable function 5-2985
PLIB_SQI_ExistsDataFormat function 5-2985
PLIB_SQI_ExistsDataModeControl function 5-2986
PLIB_SQI_ExistsDataOutputEnable function 5-2986
PLIB_SQI_ExistsDataPinStatus function 5-2987
PLIB_SQI_ExistsDmaEnable function 5-2987
PLIB_SQI_ExistsDMAEngineBusy function 5-2988
PLIB_SQI_ExistsDMAProcessInProgress function 5-2988
PLIB_SQI_ExistsEnableControl function 5-2989
PLIB_SQI_ExistsHoldPinControl function 5-2989
PLIB_SQI_ExistsInterruptControl function 5-2990
PLIB_SQI_ExistsInterruptSignalControl function 5-2990
PLIB_SQI_ExistsInterruptStatus function 5-2991
PLIB_SQI_ExistsLaneMode function 5-2992
PLIB_SQI_ExistsReceiveLatch function 5-2992
PLIB_SQI_ExistsRxBufferCount function 5-2993
PLIB_SQI_ExistsRxBufIntThreshold function 5-2993
PLIB_SQI_ExistsRxBufThreshold function 5-2994
PLIB_SQI_ExistsRxData function 5-2994
PLIB_SQI_ExistsRxUnderRun function 5-2995
PLIB_SQI_ExistsSoftReset function 5-2995
PLIB_SQI_ExistsStartDMA function 5-2996
PLIB_SQI_ExistsTransferCommand function 5-2996
PLIB_SQI_ExistsTransferCount function 5-2997
PLIB_SQI_ExistsTransferModeControl function 5-2997
PLIB_SQI_ExistsTxBufferFree function 5-2998
PLIB_SQI_ExistsTxBufIntThreshold function 5-2998
PLIB_SQI_ExistsTxBufThreshold function 5-2999
PLIB_SQI_ExistsTxData function 5-2999
PLIB_SQI_ExistsTxOverFlow function 5-3000
PLIB_SQI_ExistsWPPinControl function 5-3000
PLIB_SQI_ExistsXIPChipSelect function 5-3001
PLIB_SQI_ExistsXIPControlWord1 function 5-3001
PLIB_SQI_ExistsXIPControlWord2 function 5-3002
PLIB_SQI_ExistsXIPLaneMode function 5-3003
PLIB_SQI_ExistsXIPModeBytes function 5-3003
PLIB_SQI_ExistsXIPModeCode function 5-3004
PLIB_SQI_ExistsXIPNumberOfAddressBytes function 5-3004
PLIB_SQI_ExistsXIPNumberOfDummyBytes function 5-3005
PLIB_SQI_ExistsXIPReadOpCode function 5-3005
PLIB_SQI_HoldClear function 5-2916
PLIB_SQI_HoldGet function 5-2916
PLIB_SQI_HoldSet function 5-2917
PLIB_SQI_InterruptDisable function 5-2950
PLIB_SQI_InterruptEnable function 5-2950
PLIB_SQI_InterruptFlagGet function 5-2951
PLIB_SQI_InterruptIsEnabled function 5-2952
PLIB_SQI_InterruptSignalDisable function 5-2952
PLIB_SQI_InterruptSignalEnable function 5-2953
PLIB_SQI_InterruptSignalIsEnabled function 5-2953
PLIB_SQI_LaneModeGet function 5-2917
PLIB_SQI_LaneModeSet function 5-2918
PLIB_SQI_NumberOfReceiveBufferReads function 5-2919
PLIB_SQI_ReceiveBufferIsUnderrun function 5-2942
PLIB_SQI_ReceiveData function 5-2919
PLIB_SQI_ReceiveLatchDisable function 5-2920
PLIB_SQI_ReceiveLatchEnable function 5-2920
PLIB_SQI_ReceiveLatchGet function 5-2921
PLIB_SQI_RxBufferThresholdGet function 5-2943
PLIB_SQI_RxBufferThresholdIntGet function 5-2943
PLIB_SQI_RxBufferThresholdIntSet function 5-2944
PLIB_SQI_RxBufferThresholdSet function 5-2944
PLIB_SQI_SoftReset function 5-2921
PLIB_SQI_TransferDirectionGet function 5-2945
PLIB_SQI_TransferDirectionSet function 5-2945
PLIB_SQI_TransferModeGet function 5-2922
PLIB_SQI_TransferModeSet function 5-2922
PLIB_SQI_TransmitBufferFreeSpaceGet function 5-2946
PLIB_SQI_TransmitBufferHasOverflowed function 5-2947
PLIB_SQI_TransmitData function 5-2923
PLIB_SQI_TxBufferThresholdGet function 5-2947
PLIB_SQI_TxBufferThresholdIntGet function 5-2948
PLIB_SQI_TxBufferThresholdIntSet function 5-2948
PLIB_SQI_TxBufferThresholdSet function 5-2949
PLIB_SQI_WriteProtectClear function 5-2923
PLIB_SQI_WriteProtectGet function 5-2924
PLIB_SQI_WriteProtectSet function 5-2924
PLIB_SQI_XIPAddressBytesGet function 5-2927
9 MPLAB Harmony Help
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PLIB_SQI_XIPAddressBytesSet function 5-2927
PLIB_SQI_XIPChipSelectGet function 5-2928
PLIB_SQI_XIPChipSelectSet function 5-2928
PLIB_SQI_XIPControlWord1Get function 5-2929
PLIB_SQI_XIPControlWord1Set function 5-2930
PLIB_SQI_XIPControlWord2Get function 5-2931
PLIB_SQI_XIPControlWord2Set function 5-2931
PLIB_SQI_XIPDummyBytesGet function 5-2932
PLIB_SQI_XIPDummyBytesSet function 5-2932
PLIB_SQI_XIPLaneModeGet function 5-2933
PLIB_SQI_XIPLaneModeSet function 5-2933
PLIB_SQI_XIPModeBytesGet function 5-2934
PLIB_SQI_XIPModeBytesSet function 5-2935
PLIB_SQI_XIPModeCodeGet function 5-2935
PLIB_SQI_XIPModeCodeSet function 5-2936
PLIB_SQI_XIPReadOpcodeGet function 5-2936
PLIB_SQI_XIPReadOpcodeSet function 5-2937
plib_tmr.h 5-3081
PLIB_TMR_AssignmentSelect function 5-3025
PLIB_TMR_ClockSourceEdgeGet function 5-3034
PLIB_TMR_ClockSourceEdgeSelect function 5-3035
PLIB_TMR_ClockSourceExternalSyncDisable function 5-3035
PLIB_TMR_ClockSourceExternalSyncEnable function 5-3036
PLIB_TMR_ClockSourceSelect function 5-3036
PLIB_TMR_ContinousCountModeEnable function 5-3026
PLIB_TMR_Counter16BitClear function 5-3050
PLIB_TMR_Counter16BitGet function 5-3050
PLIB_TMR_Counter16BitSet function 5-3051
PLIB_TMR_Counter32BitClear function 5-3051
PLIB_TMR_Counter32BitGet function 5-3052
PLIB_TMR_Counter32BitSet function 5-3053
PLIB_TMR_Counter8BitClear function 5-3053
PLIB_TMR_Counter8BitGet function 5-3054
PLIB_TMR_Counter8BitSet function 5-3054
PLIB_TMR_CounterAsyncWriteDisable function 5-3055
PLIB_TMR_CounterAsyncWriteEnable function 5-3055
PLIB_TMR_CounterAsyncWriteInProgress function 5-3056
PLIB_TMR_ExistsClockSource function 5-3064
PLIB_TMR_ExistsClockSourceEdge function 5-3065
PLIB_TMR_ExistsClockSourceSync function 5-3065
PLIB_TMR_ExistsCounter16Bit function 5-3066
PLIB_TMR_ExistsCounter32Bit function 5-3066
PLIB_TMR_ExistsCounter8Bit function 5-3067
PLIB_TMR_ExistsCounterAsyncWriteControl function 5-3067
PLIB_TMR_ExistsCounterAsyncWriteInProgress function
5-3068
PLIB_TMR_ExistsCountMode function 5-3068
PLIB_TMR_ExistsEnableControl function 5-3069
PLIB_TMR_ExistsGateCurrentState function 5-3069
PLIB_TMR_ExistsGatedTimeAccumulation function 5-3070
PLIB_TMR_ExistsGatePolarity function 5-3070
PLIB_TMR_ExistsGateSinglePulseAcqusition function 5-3071
PLIB_TMR_ExistsGateSinglePulseMode function 5-3071
PLIB_TMR_ExistsGateSource function 5-3072
PLIB_TMR_ExistsGateToggleMode function 5-3072
PLIB_TMR_ExistsMode16Bit function 5-3073
PLIB_TMR_ExistsMode32Bit function 5-3073
PLIB_TMR_ExistsMode8Bit function 5-3074
PLIB_TMR_ExistsOperationInSleep function 5-3074
PLIB_TMR_ExistsPeriod16Bit function 5-3075
PLIB_TMR_ExistsPeriod32Bit function 5-3075
PLIB_TMR_ExistsPeriod8Bit function 5-3076
PLIB_TMR_ExistsPostscale function 5-3076
PLIB_TMR_ExistsPrescale function 5-3077
PLIB_TMR_ExistsPrescalerAssignment function 5-3078
PLIB_TMR_ExistsStopInIdleControl function 5-3078
PLIB_TMR_ExistsSystemClockStatus function 5-3079
PLIB_TMR_ExistsTimerAssignment function 5-3079
PLIB_TMR_ExistsTimerOperationMode function 5-3080
PLIB_TMR_ExistsTimerOscillator function 5-3080
PLIB_TMR_ExistsTriggerEventReset function 5-3081
PLIB_TMR_GateCurrentStateGet function 5-3037
PLIB_TMR_GateDisable function 5-3038
PLIB_TMR_GateEnable function 5-3038
PLIB_TMR_GatePolaritySelect function 5-3039
PLIB_TMR_GateSinglePulseAcquisitionHasCompleted function
5-3039
PLIB_TMR_GateSinglePulseAcquisitionStart function 5-3040
PLIB_TMR_GateSinglePulseModeDisable function 5-3040
9 MPLAB Harmony Help
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PLIB_TMR_GateSinglePulseModeEnable function 5-3041
PLIB_TMR_GateSourceSelect function 5-3041
PLIB_TMR_GateToggleModeDisable function 5-3042
PLIB_TMR_GateToggleModeEnable function 5-3042
PLIB_TMR_IsPeriodMatchBased function 5-3058
PLIB_TMR_Mode16BitEnable function 5-3026
PLIB_TMR_Mode32BitEnable function 5-3027
PLIB_TMR_Mode8BitEnable function 5-3028
PLIB_TMR_OperateInSleepDisable function 5-3032
PLIB_TMR_OperateInSleepEnable function 5-3032
PLIB_TMR_Period16BitGet function 5-3046
PLIB_TMR_Period16BitSet function 5-3046
PLIB_TMR_Period32BitGet function 5-3047
PLIB_TMR_Period32BitSet function 5-3048
PLIB_TMR_Period8BitGet function 5-3048
PLIB_TMR_Period8BitSet function 5-3049
PLIB_TMR_PostscaleDivisorGet function 5-3057
PLIB_TMR_PostscaleGet function 5-3057
PLIB_TMR_PostscaleSelect function 5-3058
PLIB_TMR_PrescaleDivisorGet function 5-3043
PLIB_TMR_PrescaleGet function 5-3044
PLIB_TMR_PrescalerDisable function 5-3044
PLIB_TMR_PrescalerEnable function 5-3045
PLIB_TMR_PrescaleSelect function 5-3045
PLIB_TMR_SingleShotModeEnable function 5-3031
PLIB_TMR_Start function 5-3028
PLIB_TMR_Stop function 5-3029
PLIB_TMR_StopInIdleDisable function 5-3033
PLIB_TMR_StopInIdleEnable function 5-3033
PLIB_TMR_SystemClockFromTimerIsActive function 5-3059
PLIB_TMR_TimerOscillatorDisable function 5-3029
PLIB_TMR_TimerOscillatorEnable function 5-3030
PLIB_TMR_TriggerEventResetDisable function 5-3030
PLIB_TMR_TriggerEventResetEnable function 5-3031
plib_usart.h 5-3164
PLIB_USART_AlternateIODisable function 5-3105
PLIB_USART_AlternateIOEnable function 5-3105
PLIB_USART_BaudRateAutoDetectEnable function 5-3116
PLIB_USART_BaudRateAutoDetectIsComplete function 5-3117
PLIB_USART_BaudRateAutoDetectOverflowHasOccurred
function 5-3117
PLIB_USART_BaudRateGet function 5-3118
PLIB_USART_BaudRateHighDisable function 5-3118
PLIB_USART_BaudRateHighEnable function 5-3119
PLIB_USART_BaudRateHighSet function 5-3119
PLIB_USART_BaudRateModeSelect function 5-3120
PLIB_USART_BaudRateSet function 5-3121
PLIB_USART_Disable function 5-3106
PLIB_USART_Enable function 5-3106
PLIB_USART_ExistsAlternateIO function 5-3144
PLIB_USART_ExistsBaudRate function 5-3145
PLIB_USART_ExistsBaudRateAutoDetect function 5-3145
PLIB_USART_ExistsBaudRateAutoDetectOverflow function
5-3146
PLIB_USART_ExistsBaudRateBitMode function 5-3146
PLIB_USART_ExistsBaudRateHigh function 5-3147
PLIB_USART_ExistsEnable function 5-3147
PLIB_USART_ExistsHandshakeMode function 5-3148
PLIB_USART_ExistsIrDA function 5-3148
PLIB_USART_ExistsLineControlMode function 5-3149
PLIB_USART_ExistsLoopback function 5-3149
PLIB_USART_ExistsOperationMode function 5-3150
PLIB_USART_ExistsReceiver function 5-3150
PLIB_USART_ExistsReceiverAddressAutoDetect function
5-3151
PLIB_USART_ExistsReceiverAddressDetect function 5-3151
PLIB_USART_ExistsReceiverDataAvailableStatus function
5-3152
PLIB_USART_ExistsReceiverEnable function 5-3152
PLIB_USART_ExistsReceiverFramingErrorStatus function
5-3153
PLIB_USART_ExistsReceiverIdleStateLowEnable function
5-3153
PLIB_USART_ExistsReceiverIdleStatus function 5-3154
PLIB_USART_ExistsReceiverInterruptMode function 5-3154
PLIB_USART_ExistsReceiverMode function 5-3155
PLIB_USART_ExistsReceiverOverrunStatus function 5-3155
PLIB_USART_ExistsReceiverParityErrorStatus function 5-3156
PLIB_USART_ExistsStopInIdle function 5-3156
PLIB_USART_ExistsSyncClockPolarity function 5-3157
9 MPLAB Harmony Help
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PLIB_USART_ExistsSyncClockSource function 5-3158
PLIB_USART_ExistsSyncMode function 5-3158
PLIB_USART_ExistsTransmitter function 5-3159
PLIB_USART_ExistsTransmitter9BitsSend function 5-3159
PLIB_USART_ExistsTransmitterBreak function 5-3160
PLIB_USART_ExistsTransmitterBufferFullStatus function
5-3160
PLIB_USART_ExistsTransmitterEmptyStatus function 5-3161
PLIB_USART_ExistsTransmitterEnable function 5-3161
PLIB_USART_ExistsTransmitterIdleIsLow function 5-3162
PLIB_USART_ExistsTransmitterIdleStatus function 5-3162
PLIB_USART_ExistsTransmitterInterruptMode function 5-3163
PLIB_USART_ExistsWakeOnStart function 5-3163
PLIB_USART_HandshakeModeSelect function 5-3107
PLIB_USART_IrDADisable function 5-3108
PLIB_USART_IrDAEnable function 5-3108
PLIB_USART_LineControlModeSelect function 5-3109
PLIB_USART_LoopbackDisable function 5-3109
PLIB_USART_LoopbackEnable function 5-3110
PLIB_USART_OperationModeSelect function 5-3110
PLIB_USART_ReceiverAddressAutoDetectDisable function
5-3129
PLIB_USART_ReceiverAddressAutoDetectEnable function
5-3129
PLIB_USART_ReceiverAddressDetectDisable function 5-3130
PLIB_USART_ReceiverAddressDetectEnable function 5-3131
PLIB_USART_ReceiverAddressIsReceived function 5-3131
PLIB_USART_ReceiverByteReceive function 5-3132
PLIB_USART_ReceiverDataIsAvailable function 5-3133
PLIB_USART_ReceiverDisable function 5-3133
PLIB_USART_ReceiverEnable function 5-3134
PLIB_USART_ReceiverFramingErrorHasOccurred function
5-3134
PLIB_USART_ReceiverIdleStateLowDisable function 5-3135
PLIB_USART_ReceiverIdleStateLowEnable function 5-3135
PLIB_USART_ReceiverInterruptModeSelect function 5-3136
PLIB_USART_ReceiverIsIdle function 5-3136
PLIB_USART_ReceiverModeSelect function 5-3137
PLIB_USART_ReceiverOverrunErrorClear function 5-3138
PLIB_USART_ReceiverOverrunHasOccurred function 5-3138
PLIB_USART_ReceiverParityErrorHasOccurred function 5-3139
PLIB_USART_StopInIdleDisable function 5-3111
PLIB_USART_StopInIdleEnable function 5-3111
PLIB_USART_SyncClockPolarityIdleHighDisable function
5-3112
PLIB_USART_SyncClockPolarityIdleHighEnable function
5-3113
PLIB_USART_SyncClockSourceSelect function 5-3113
PLIB_USART_SyncModeSelect function 5-3114
PLIB_USART_Transmitter9BitsSend function 5-3122
PLIB_USART_TransmitterBreakSend function 5-3122
PLIB_USART_TransmitterBreakSendIsComplete function
5-3123
PLIB_USART_TransmitterBufferIsFull function 5-3124
PLIB_USART_TransmitterByteSend function 5-3124
PLIB_USART_TransmitterDisable function 5-3125
PLIB_USART_TransmitterEnable function 5-3125
PLIB_USART_TransmitterIdleIsLowDisable function 5-3126
PLIB_USART_TransmitterIdleIsLowEnable function 5-3127
PLIB_USART_TransmitterInterruptModeSelect function 5-3127
PLIB_USART_TransmitterIsEmpty function 5-3128
PLIB_USART_TransmitterIsIdle function 5-3128
PLIB_USART_WakeOnStartDisable function 5-3114
PLIB_USART_WakeOnStartEnable function 5-3115
PLIB_USART_WakeOnStartIsEnabled function 5-3115
plib_usb.h 5-3313
PLIB_USB_ActivityPending function 5-3260
PLIB_USB_AllInterruptEnable function 5-3188
PLIB_USB_AutoSuspendDisable function 5-3189
PLIB_USB_AutoSuspendEnable function 5-3190
PLIB_USB_BDTBaseAddressGet function 5-3201
PLIB_USB_BDTBaseAddressSet function 5-3201
PLIB_USB_BufferAddressGet function 5-3202
PLIB_USB_BufferAddressSet function 5-3203
PLIB_USB_BufferAllCancelReleaseToUSB function 5-3203
PLIB_USB_BufferByteCountGet function 5-3204
PLIB_USB_BufferByteCountSet function 5-3205
PLIB_USB_BufferCancelReleaseToUSB function 5-3205
PLIB_USB_BufferClearAll function 5-3206
PLIB_USB_BufferClearAllDTSEnable function 5-3207
PLIB_USB_BufferDataToggleGet function 5-3207
9 MPLAB Harmony Help
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PLIB_USB_BufferDataToggleSelect function 5-3208
PLIB_USB_BufferDataToggleSyncDisable function 5-3209
PLIB_USB_BufferDataToggleSyncEnable function 5-3209
PLIB_USB_BufferEP0RxStatusInitialize function 5-3210
PLIB_USB_BufferIndexGet function 5-3211
PLIB_USB_BufferPIDBitsClear function 5-3211
PLIB_USB_BufferPIDGet function 5-3212
PLIB_USB_BufferReleasedToSW function 5-3213
PLIB_USB_BufferReleaseToUSB function 5-3214
PLIB_USB_BufferSchedule function 5-3214
PLIB_USB_BufferStallDisable function 5-3215
PLIB_USB_BufferStallEnable function 5-3216
PLIB_USB_BufferStallGet function 5-3217
PLIB_USB_DeviceAddressGet function 5-3190
PLIB_USB_DeviceAddressSet function 5-3191
PLIB_USB_Disable function 5-3191
PLIB_USB_Enable function 5-3192
PLIB_USB_EP0HostSetup function 5-3217
PLIB_USB_EP0LSDirectConnectDisable function 5-3218
PLIB_USB_EP0LSDirectConnectEnable function 5-3218
PLIB_USB_EP0NakRetryDisable function 5-3219
PLIB_USB_EP0NakRetryEnable function 5-3219
PLIB_USB_EPnAttributesClear function 5-3220
PLIB_USB_EPnAttributesSet function 5-3221
PLIB_USB_EPnControlTransferDisable function 5-3221
PLIB_USB_EPnControlTransferEnable function 5-3222
PLIB_USB_EPnDirectionDisable function 5-3222
PLIB_USB_EPnHandshakeDisable function 5-3223
PLIB_USB_EPnHandshakeEnable function 5-3223
PLIB_USB_EPnIsStalled function 5-3224
PLIB_USB_EPnRxDisable function 5-3225
PLIB_USB_EPnRxEnable function 5-3225
PLIB_USB_EPnRxSelect function 5-3226
PLIB_USB_EPnStallClear function 5-3226
PLIB_USB_EPnTxDisable function 5-3227
PLIB_USB_EPnTxEnable function 5-3227
PLIB_USB_EPnTxRxSelect function 5-3228
PLIB_USB_EPnTxSelect function 5-3229
PLIB_USB_ErrorInterruptDisable function 5-3234
PLIB_USB_ErrorInterruptEnable function 5-3235
PLIB_USB_ErrorInterruptFlagAllGet function 5-3235
PLIB_USB_ErrorInterruptFlagClear function 5-3236
PLIB_USB_ErrorInterruptFlagGet function 5-3236
PLIB_USB_ErrorInterruptFlagSet function 5-3237
PLIB_USB_ErrorInterruptIsEnabled function 5-3237
PLIB_USB_ExistsActivityPending function 5-3283
PLIB_USB_ExistsALL_Interrupt function 5-3284
PLIB_USB_ExistsAutomaticSuspend function 5-3284
PLIB_USB_ExistsBDTBaseAddress function 5-3285
PLIB_USB_ExistsBDTFunctions function 5-3285
PLIB_USB_ExistsBufferFreeze function 5-3286
PLIB_USB_ExistsDeviceAddress function 5-3287
PLIB_USB_ExistsEP0LowSpeedConnect function 5-3287
PLIB_USB_ExistsEP0NAKRetry function 5-3288
PLIB_USB_ExistsEPnRxEnable function 5-3289
PLIB_USB_ExistsEPnTxRx function 5-3289
PLIB_USB_ExistsERR_Interrupt function 5-3290
PLIB_USB_ExistsERR_InterruptStatus function 5-3290
PLIB_USB_ExistsEyePattern function 5-3291
PLIB_USB_ExistsFrameNumber function 5-3291
PLIB_USB_ExistsGEN_Interrupt function 5-3292
PLIB_USB_ExistsGEN_InterruptStatus function 5-3293
PLIB_USB_ExistsHostBusyWithToken function 5-3293
PLIB_USB_ExistsHostGeneratesReset function 5-3294
PLIB_USB_ExistsLastDirection function 5-3294
PLIB_USB_ExistsLastEndpoint function 5-3295
PLIB_USB_ExistsLastPingPong function 5-3295
PLIB_USB_ExistsLastTransactionDetails function 5-3296
PLIB_USB_ExistsLiveJState function 5-3296
PLIB_USB_ExistsLiveSingleEndedZero function 5-3297
PLIB_USB_ExistsModuleBusy function 5-3297
PLIB_USB_ExistsModulePower function 5-3298
PLIB_USB_ExistsNextTokenSpeed function 5-3298
PLIB_USB_ExistsOnChipPullup function 5-3299
PLIB_USB_ExistsOnChipTransceiver function 5-3299
PLIB_USB_ExistsOpModeSelect function 5-3300
PLIB_USB_ExistsOTG_ASessionValid function 5-3300
PLIB_USB_ExistsOTG_BSessionEnd function 5-3301
9 MPLAB Harmony Help
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PLIB_USB_ExistsOTG_IDPinState function 5-3301
PLIB_USB_ExistsOTG_Interrupt function 5-3302
PLIB_USB_ExistsOTG_InterruptStatus function 5-3302
PLIB_USB_ExistsOTG_LineState function 5-3303
PLIB_USB_ExistsOTG_PullUpPullDown function 5-3303
PLIB_USB_ExistsOTG_SessionValid function 5-3304
PLIB_USB_ExistsOTG_VbusCharge function 5-3304
PLIB_USB_ExistsOTG_VbusDischarge function 5-3305
PLIB_USB_ExistsOTG_VbusPowerOnOff function 5-3305
PLIB_USB_ExistsPacketTransfer function 5-3306
PLIB_USB_ExistsPingPongMode function 5-3306
PLIB_USB_ExistsResumeSignaling function 5-3307
PLIB_USB_ExistsSleepEntryGuard function 5-3308
PLIB_USB_ExistsSOFThreshold function 5-3308
PLIB_USB_ExistsSpeedControl function 5-3309
PLIB_USB_ExistsStartOfFrames function 5-3309
PLIB_USB_ExistsStopInIdle function 5-3310
PLIB_USB_ExistsSuspend function 5-3310
PLIB_USB_ExistsTokenEP function 5-3311
PLIB_USB_ExistsTokenPID function 5-3311
PLIB_USB_ExistsUOEMonitor function 5-3312
PLIB_USB_ExternalComparatorMode2Pin function 5-3267
PLIB_USB_ExternalComparatorMode3Pin function 5-3267
PLIB_USB_EyePatternDisable function 5-3274
PLIB_USB_EyePatternEnable function 5-3274
PLIB_USB_FrameNumberGet function 5-3261
PLIB_USB_FullSpeedDisable function 5-3193
PLIB_USB_FullSpeedEnable function 5-3193
PLIB_USB_I2CInterfaceForExtModuleDisable function 5-3265
PLIB_USB_I2CInterfaceForExtModuleEnable function 5-3265
PLIB_USB_InterruptDisable function 5-3229
PLIB_USB_InterruptEnable function 5-3230
PLIB_USB_InterruptEnableGet function 5-3230
PLIB_USB_InterruptFlagAllGet function 5-3231
PLIB_USB_InterruptFlagClear function 5-3231
PLIB_USB_InterruptFlagGet function 5-3232
PLIB_USB_InterruptFlagSet function 5-3233
PLIB_USB_InterruptIsEnabled function 5-3233
PLIB_USB_IsBusyWithToken function 5-3241
PLIB_USB_JStateIsActive function 5-3261
PLIB_USB_LastTransactionDetailsGet function 5-3238
PLIB_USB_LastTransactionDirectionGet function 5-3239
PLIB_USB_LastTransactionEndPtGet function 5-3239
PLIB_USB_LastTransactionPingPongStateGet function 5-3240
PLIB_USB_ModuleIsBusy function 5-3275
PLIB_USB_OnChipPullUpDisable function 5-3194
PLIB_USB_OnChipPullUpEnable function 5-3194
PLIB_USB_OperatingModeSelect function 5-3195
PLIB_USB_OTG_BSessionHasEnded function 5-3249
PLIB_USB_OTG_IDPinStateIsTypeA function 5-3249
PLIB_USB_OTG_InterruptDisable function 5-3257
PLIB_USB_OTG_InterruptEnable function 5-3257
PLIB_USB_OTG_InterruptFlagClear function 5-3258
PLIB_USB_OTG_InterruptFlagGet function 5-3258
PLIB_USB_OTG_InterruptFlagSet function 5-3259
PLIB_USB_OTG_InterruptIsEnabled function 5-3259
PLIB_USB_OTG_LineStateIsStable function 5-3250
PLIB_USB_OTG_PullUpPullDownSetup function 5-3251
PLIB_USB_OTG_SessionValid function 5-3251
PLIB_USB_OTG_VBusChargeDisable function 5-3252
PLIB_USB_OTG_VBusChargeEnable function 5-3252
PLIB_USB_OTG_VBusChargeTo3V function 5-3253
PLIB_USB_OTG_VBusChargeTo5V function 5-3253
PLIB_USB_OTG_VBusDischargeDisable function 5-3254
PLIB_USB_OTG_VBusDischargeEnable function 5-3254
PLIB_USB_OTG_VBusPowerOff function 5-3255
PLIB_USB_OTG_VBusPowerOn function 5-3255
PLIB_USB_OTG_VBusValid function 5-3256
PLIB_USB_PacketTransferDisable function 5-3262
PLIB_USB_PacketTransferEnable function 5-3263
PLIB_USB_PacketTransferIsDisabled function 5-3263
PLIB_USB_PingPongFreeze function 5-3276
PLIB_USB_PingPongModeGet function 5-3195
PLIB_USB_PingPongModeSelect function 5-3196
PLIB_USB_PingPongReset function 5-3276
PLIB_USB_PingPongUnfreeze function 5-3277
PLIB_USB_PWMCounterDisable function 5-3268
PLIB_USB_PWMCounterEnable function 5-3268
9 MPLAB Harmony Help
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PLIB_USB_PWMDisable function 5-3269
PLIB_USB_PWMEnable function 5-3269
PLIB_USB_PWMPolaritiyActiveLow function 5-3270
PLIB_USB_PWMPolarityActiveHigh function 5-3270
PLIB_USB_ResetSignalDisable function 5-3246
PLIB_USB_ResetSignalEnable function 5-3247
PLIB_USB_ResumeSignalingDisable function 5-3248
PLIB_USB_ResumeSignalingEnable function 5-3248
PLIB_USB_SE0InProgress function 5-3264
PLIB_USB_SleepGuardDisable function 5-3197
PLIB_USB_SleepGuardEnable function 5-3197
PLIB_USB_SOFDisable function 5-3241
PLIB_USB_SOFEnable function 5-3242
PLIB_USB_SOFThresholdGet function 5-3242
PLIB_USB_SOFThresholdSet function 5-3243
PLIB_USB_StopInIdleDisable function 5-3198
PLIB_USB_StopInIdleEnable function 5-3198
PLIB_USB_SuspendDisable function 5-3199
PLIB_USB_SuspendEnable function 5-3199
PLIB_USB_TokenEPGet function 5-3244
PLIB_USB_TokenEPSet function 5-3244
PLIB_USB_TokenPIDGet function 5-3245
PLIB_USB_TokenPIDSet function 5-3245
PLIB_USB_TokenSend function 5-3277
PLIB_USB_TokenSpeedSelect function 5-3246
PLIB_USB_TransceiverDisable function 5-3266
PLIB_USB_TransceiverEnable function 5-3266
PLIB_USB_UOEMonitorDisable function 5-3200
PLIB_USB_UOEMonitorEnable function 5-3200
PLIB_USB_VBoostDisable function 5-3271
PLIB_USB_VBoostEnable function 5-3271
PLIB_USB_VBUSComparatorDisable function 5-3272
PLIB_USB_VBUSComparatorEnable function 5-3272
PLIB_USB_VBUSPullUpDisable function 5-3273
PLIB_USB_VBUSPullUpEnable function 5-3273
plib_wdt.h 5-3330
PLIB_WDT_Disable function 5-3323
PLIB_WDT_Enable function 5-3324
PLIB_WDT_ExistsEnableControl function 5-3328
PLIB_WDT_ExistsPostscalarValue function 5-3328
PLIB_WDT_ExistsTimerClear function 5-3329
PLIB_WDT_ExistsWindowEnable function 5-3329
PLIB_WDT_IsEnabled function 5-3326
PLIB_WDT_PostscalarValueGet function 5-3327
PLIB_WDT_TimerClear function 5-3325
PLIB_WDT_WindowDisable function 5-3324
PLIB_WDT_WindowEnable function 5-3325
PMP Peripheral Library 5-2478
PMP_ACK_MODE enumeration 5-2546
PMP_ADDRESS_HOLD_LATCH_WAIT_STATES enumeration
5-2546
PMP_ADDRESS_LATCH enumeration 5-2547
PMP_ADDRESS_LATCH_WAIT_STATES enumeration 5-2547
PMP_ADDRESS_PORT enumeration 5-2548
PMP_ALTERNATE_MASTER_WAIT_STATES enumeration
5-2549
PMP_CHIP_SELECT enumeration 5-2549
PMP_CHIPSELECT_FUNCTION enumeration 5-2550
PMP_DATA_HOLD_STATES enumeration 5-2550
PMP_DATA_LENGTH enumeration 5-2551
PMP_DATA_SIZE enumeration 5-2551
PMP_DATA_WAIT_STATES enumeration 5-2551
PMP_INCREMENT_MODE enumeration 5-2552
PMP_INPUT_BUFFER_TYPE enumeration 5-2552
PMP_INTERRUPT_MODE enumeration 5-2553
PMP_MASTER_MODE enumeration 5-2553
PMP_MODULE_ID enumeration 5-2554
PMP_MUX_MODE enumeration 5-2554
PMP_OPERATION_MODE enumeration 5-2555
PMP_PMBE_PORT enumeration 5-2555
PMP_POLARITY_LEVEL enumeration 5-2556
PMP_STROBE_WAIT_STATES enumeration 5-2556
Porting Applications from the MLA Graphics Library to the
MPLAB Harmony Graphics Library 5-686
Porting Applications from the V6 Beta TCP/IP Stack to the
MPLAB Harmony TCP/IP Stack 5-3557
Porting the MPLAB Harmony Drivers and Peripheral Library
5-3565
Ports Change Notification 5-2599
Ports Control 5-2598, 5-3471
9 MPLAB Harmony Help
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Ports Function Remap 5-2599
Ports Peripheral Library 5-2593
Ports System Service Library 5-3465
PORTS_ANALOG_PIN enumeration 5-2629
PORTS_BIT_POS enumeration 5-2631
PORTS_CHANGE_NOTICE_PIN enumeration 5-2632
PORTS_CHANNEL enumeration 5-2635
PORTS_DATA_MASK type 5-2636
PORTS_DATA_TYPE type 5-2636
PORTS_MODULE_ID enumeration 5-2636
PORTS_PERIPHERAL_OD enumeration 5-2637
PORTS_PIN enumeration 5-2638
PORTS_PIN_MODE enumeration 5-2638
PORTS_REMAP_FUNCTION enumeration 5-2639
PORTS_REMAP_INPUT_FUNCTION enumeration 5-2642
PORTS_REMAP_INPUT_PIN enumeration 5-2643
PORTS_REMAP_OUTPUT_FUNCTION enumeration 5-2644
PORTS_REMAP_OUTPUT_PIN enumeration 5-2645
PORTS_REMAP_PIN enumeration 5-2646
Power Peripheral Library 5-2662
POWER_MODULE enumeration 5-2677
POWER_MODULE_ID enumeration 5-2680
Power-Saving Modes 5-1374, 5-1672, 5-2822
Prefetch Cache Peripheral Library 5-2427
Prefetch Control Operations 5-2433
Prefetch Status Operations 5-2433
Previous Versions 5-3964
primitive_demo 3-87
primitiveTaskImage variable 5-888
PRIV_LOCALIZED_PASSWORD_KEY_LEN macro 5-3827
Project Layout 1-10
PUTIMAGE_PARAM structure 5-939
PWM Mode with Enabled Faults 5-2293
Q
Queue Operation 5-1319
QUEUE_ELEMENT_OBJECT type 5-393
R
RdiaCosine function 5-797
RdiaSine function 5-798
REACHABLE_TIME macro 5-3803
Reading a Capture Value 5-2174
Reading a File 5-3394
Reboot TCP/IP Stack Library 5-3806
REBOOT_PORT macro 5-3808
REBOOT_SAME_SUBNET_ONLY macro 5-3808
Receive 5-1919
Receive Filtering Overview 5-1912
Receiving a CAN Message 5-1562
Receiving a Report 5-4140
Receiving Data 5-4074
recv function 5-3605
recvfrom function 5-3606
RED macro 5-1049
Reduced Media Independent Interface (RMII) 5-1910
Release Contents 1-25
Release Notes 1-23, 2-40, 3-64, 3-84, 3-99, 3-102, 3-113,
3-123, 3-130, 3-142, 3-149, 4-178, 5-194, 5-227, 5-254, 5-289,
5-299, 5-309, 5-320, 5-333, 5-343, 5-367, 5-397, 5-419, 5-457,
5-511, 5-552, 5-601, 5-680, 5-695, 5-1110, 5-1127, 5-1167,
5-1275, 5-1312, 5-1362, 5-1472, 5-1520, 5-1554, 5-1668,
5-1734, 5-1865, 5-1904, 5-2060, 5-2171, 5-2203, 5-2253,
5-2288, 5-2331, 5-2428, 5-2478, 5-2594, 5-2662, 5-2688,
5-2704, 5-2762, 5-2799, 5-2892, 5-3011, 5-3086, 5-3170,
5-3320, 5-3348, 5-3363, 5-3377, 5-3419, 5-3439, 5-3466,
5-3500, 5-3530, 5-3536, 5-3546, 5-3570, 5-3575, 5-3598,
5-3615, 5-3625, 5-3637, 5-3646, 5-3654, 5-3659, 5-3690,
5-3698, 5-3709, 5-3718, 5-3748, 5-3771, 5-3795, 5-3799,
5-3806, 5-3809, 5-3822, 5-3858, 5-3868, 5-3881, 5-3913,
5-3917, 5-3930, 5-3955, 5-3964, 5-3978, 5-4004, 5-4060,
5-4100, 5-4131, 5-4169, 5-4180, 5-4200, 6-4226, 7-4230,
7-4232, 7-4234, 7-4236
Release Types 1-30
Rendering 5-698
RequestEntirePaletteChange macro 5-1049
RequestPaletteChange function 5-876
Required Hardware 3-103, 3-124, 3-143
Reset Peripheral Library 5-2687
RESET_CONFIG_REG_READ_ERROR enumeration 5-2695
RESET_MODULE_ID enumeration 5-2694
9 MPLAB Harmony Help
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RESET_NMI_COUNT_TYPE type 5-2695
RESET_NMI_REASON enumeration 5-2695
RETRANS_TIMER macro 5-3803
RTCC Mode Operations 5-2708
RTCC Peripheral Library 5-2703
RTCC_ALARM_MASK_CONFIGURATION enumeration 5-2747
RTCC_MODULE_ID enumeration 5-2748
RTCC_VALUE_REGISTER_POINTER enumeration 5-2748
RTOS Demonstrations 3-113
RTR_SOLICITATION_INTERVAL macro 5-3804
Running the Application 3-111, 3-128, 3-147
Running the Configurator Plug-in 2-44
Running the Demonstration 3-67, 3-70, 3-72, 3-74, 3-76, 3-86,
3-88, 3-90, 3-91, 3-115, 3-116, 3-118, 3-131, 3-133, 3-135,
3-153, 3-155, 3-156, 3-159, 3-160, 3-161, 3-162, 3-164, 3-165,
3-167, 3-168, 3-170
S
S1D13517 Data Types and Constants 5-331
S1D13517 Graphics Controller Driver Library 5-319
SADDLEBROWN macro 5-1049
Sample Code 5-1912
SAT16 function 5-1263
SAT16N function 5-1264
SAT16P function 5-1264
SB_MODULE_ID enumeration 5-2786
SCAN_BS_PRESSED macro 5-1049
SCAN_BS_RELEASED macro 5-1050
SCAN_CR_PRESSED macro 5-1050
SCAN_CR_RELEASED macro 5-1050
SCAN_CRA_PRESSED macro 5-1050
SCAN_CRA_RELEASED macro 5-1050
SCAN_DEL_PRESSED macro 5-1050
SCAN_DEL_RELEASED macro 5-1051
SCAN_DOWN_PRESSED macro 5-1051
SCAN_DOWN_RELEASED macro 5-1051
SCAN_END_PRESSED macro 5-1051
SCAN_END_RELEASED macro 5-1051
SCAN_HOME_PRESSED macro 5-1051
SCAN_HOME_RELEASED macro 5-1051
SCAN_LEFT_PRESSED macro 5-1052
SCAN_LEFT_RELEASED macro 5-1052
SCAN_PGDOWN_PRESSED macro 5-1052
SCAN_PGDOWN_RELEASED macro 5-1052
SCAN_PGUP_PRESSED macro 5-1052
SCAN_PGUP_RELEASED macro 5-1052
SCAN_RIGHT_PRESSED macro 5-1053
SCAN_RIGHT_RELEASED macro 5-1053
SCAN_SPACE_PRESSED macro 5-1053
SCAN_SPACE_RELEASED macro 5-1053
SCAN_TAB_PRESSED macro 5-1053
SCAN_TAB_RELEASED macro 5-1053
SCAN_UP_PRESSED macro 5-1053
SCAN_UP_RELEASED macro 5-1054
Scheme Functionality 5-701
sd_card_fat_single_disk 3-69
SDCARD_MAX_LIMIT macro 5-415
Secure Digital (SD) Card Driver Library 5-397
Semaphores 5-1318
send function 5-3607
Sending a Report 5-4139
Sending Data 5-4072
sendto function 5-3607
Service Discovery 5-3957
SET_PA6_AS_OUTPUT macro 5-674
SetEntirePalette macro 5-1054
SetPalette function 5-876
SetPaletteBpp function 5-877
SetPaletteFlash function 5-877
Setting Bus Speed 5-1558
SHOW_DATA macro 5-1054
SIENNA macro 5-1054
SIN45 macro 5-1055
Single Compare Set High Mode 5-2291
Single Compare Toggle Mode 5-2292
Slave Mode 5-2821
SMI_SCAN_DATA_STATUS enumeration 5-285
SMTP Client Examples 5-3810
SMTP Client Long Message Example 5-3812
9 MPLAB Harmony Help
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SMTP Client Short Message Example 5-3811
SMTP TCP/IP Stack Library 5-3809
smtp.h 5-3821
SMTP_CLIENT_MODULE_CONFIG structure 5-3820
smtp_config.h 5-3822
SMTP_CONNECT_ERROR macro 5-3819
SMTP_POINTERS structure 5-3820
SMTP_PORT macro 5-3814
SMTP_RESOLVE_ERROR macro 5-3819
SMTP_SERVER_REPLY_TIMEOUT macro 5-3814
SMTP_SUCCESS macro 5-3820
SNMP TCP/IP Stack Library 5-3822
snmp.h 5-3854
SNMP_BIB_FILE_NAME macro 5-3827
SNMP_BUFFER_DATA structure 5-3848
SNMP_COMMUNITY_MAX_LEN macro 5-3827
SNMP_COMMUNITY_TYPE enumeration 5-3848
snmp_config.h 5-3855
SNMP_END_OF_VAR macro 5-3846
SNMP_H macro 5-3846
SNMP_ID type 5-3849
SNMP_INDEX type 5-3849
SNMP_INDEX_INVALID macro 5-3847
SNMP_MAX_COMMUNITY_SUPPORT macro 5-3827
SNMP_MAX_MSG_SIZE macro 5-3828
SNMP_MAX_NON_REC_ID_OID macro 5-3828
SNMP_MODULE_CONFIG structure 5-3849
SNMP_NET_CONFIG structure 5-3831
SNMP_NON_MIB_RECD_INFO structure 5-3849
SNMP_NOTIFY_INFO structure 5-3849
SNMP_PROCESSING_MEM_INFO_PTRS structure 5-3850
SNMP_READ_COMMUNITIES macro 5-3828
SNMP_STACK_DCPT_STUB structure 5-3850
SNMP_START_OF_VAR macro 5-3847
SNMP_TRAP_COMMUNITY_MAX_LEN_MEM_USE macro
5-3828
SNMP_TRAP_INFO structure 5-3850
SNMP_TRAP_IP_ADDRESS_TYPE enumeration 5-3851
SNMP_V1 macro 5-3847
SNMP_V2C macro 5-3847
SNMP_V3 macro 5-3847
SNMP_VAL union 5-3851
SNMP_WRITE_COMMUNITIES macro 5-3828
SNMPGetExactIndex function 5-3841
SNMPGetNextIndex function 5-3841
SNMPGetVar function 5-3842
SNMPIsValidSetLen function 5-3842
SNMPSendTrap function 5-3843
SNMPSetVar function 5-3843
snmpv3.h 5-3856
SNMPV3_AUTH_LOCALIZED_PASSWORD_KEY_LEN_MEM_
USE
macro 5-3829
snmpv3_config.h 5-3857
SNMPV3_PRIV_LOCALIZED_PASSWORD_KEY_LEN_MEM_
USE
macro 5-3829
SNMPV3_PROCESSING_MEM_INFO_PTRS structure 5-3852
SNMPV3_STACK_DCPT_STUB structure 5-3852
SNMPV3_TRAP_MSG_PROCESS_MODEL_DB macro 5-3829
SNMPV3_TRAP_SECURITY_LEVEL_DB macro 5-3829
SNMPV3_TRAP_SECURITY_MODEL_TYPE_DB macro 5-3829
SNMPV3_TRAP_USER_SECURITY_NAME_DB macro 5-3829
SNMPV3_USER_AUTH_PASSWD_DB macro 5-3830
SNMPV3_USER_AUTH_TYPE_DB macro 5-3830
SNMPV3_USER_PRIV_PASSWD_DB macro 5-3830
SNMPV3_USER_PRIV_TYPE_DB macro 5-3830
SNMPV3_USER_SECURITY_NAME_DB macro 5-3830
SNMPV3_USER_SECURITY_NAME_LEN_MEM_USE macro
5-3830
SNMPV3_USM_MAX_USER macro 5-3831
SNMPv3ComputeHMACIpadOpadForAuthLoclzedKey function
5-3845
SNMPv3USMAuthPrivPswdLocalization function 5-3845
SNMPValidateCommunity function 5-3844
SNTP TCP/IP Stack Library 5-3858
sntp.h 5-3866
sntp_config.h 5-3867
SNTP_MODULE_CONFIG structure 5-3865
SNTP_RESULT enumeration 5-3865
SOCK_DGRAM macro 5-3610
9 MPLAB Harmony Help
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SOCK_STREAM macro 5-3610
sockaddr structure 5-3612
SOCKADDR type 5-3611
sockaddr_in structure 5-3612
SOCKADDR_IN type 5-3611
socket function 5-3608
SOCKET type 5-3611
SOCKET_CNXN_IN_PROGRESS macro 5-3610
SOCKET_DISCONNECTED macro 5-3610
SOCKET_ERROR macro 5-3610
Software Drivers 5-299
Source Files to Include 5-3973
Source Interrupt Management 5-3423
Source/Destination/Peripheral Address Management 5-1745
Source/Destination/Peripheral Data Management 5-1746
Special Considerations 5-2600, 5-3473
Special Function Modules (CRC) 5-1747
SPI Driver Demonstrations 3-123
SPI Driver Library 5-417
SPI Error Handling 5-2823
SPI Master Mode and Frame Master Mode 5-2811
SPI Master Mode and Frame Slave Mode 5-2812
SPI Master Mode Clock Frequency 5-2823
SPI Peripheral Library 5-2798
SPI Receive-only Operation 5-2823
SPI Slave Mode and Frame Master Mode 5-2814, 5-2815
SPI_AUDIO_COMMUNICATION_WIDTH enumeration 5-2859
SPI_AUDIO_ERROR enumeration 5-2859
SPI_AUDIO_PROTOCOL enumeration 5-2859
SPI_AUDIO_TRANSMIT_MODE enumeration 5-2860
SPI_BAUD_RATE_CLOCK enumeration 5-2860
SPI_CLOCK_POLARITY enumeration 5-2860
SPI_COMMUNICATION_WIDTH enumeration 5-2861
SPI_DATA_TYPE type 5-2861
SPI_ERROR_INTERRUPT enumeration 5-2861
SPI_FIFO_INTERRUPT enumeration 5-2862
SPI_FIFO_TYPE enumeration 5-2863
SPI_FRAME_PULSE_DIRECTION enumeration 5-2863
SPI_FRAME_PULSE_EDGE enumeration 5-2863
SPI_FRAME_PULSE_POLARITY enumeration 5-2864
SPI_FRAME_PULSE_WIDTH enumeration 5-2864
SPI_FRAME_SYNC_PULSE enumeration 5-2864
SPI_INPUT_SAMPLING_PHASE enumeration 5-2865
SPI_MODULE_ID enumeration 5-2865
SPI_OUTPUT_DATA_PHASE enumeration 5-2866
SPI_PIN enumeration 5-2866
SPI_PRESCALE_PRIMARY enumeration 5-2867
SPI_PRESCALE_SECONDARY enumeration 5-2867
SQI Peripheral Library 5-2891
SQI_ADDR_BYTES enumeration 5-2966
SQI_BD_CTRL_WORD enumeration 5-2966
SQI_BD_STATE enumeration 5-2967
SQI_CLK_DIV enumeration 5-2968
SQI_CS_NUM enumeration 5-2969
SQI_CS_OEN enumeration 5-2969
SQI_DATA_FORMAT enumeration 5-2969
SQI_DATA_MODE enumeration 5-2970
SQI_DATA_OEN enumeration 5-2970
SQI_DATA_TYPE type 5-2970
SQI_DUMMY_BYTES enumeration 5-2971
SQI_INTERRUPTS enumeration 5-2971
SQI_LANE_MODE enumeration 5-2972
SQI_MODE_BYTES enumeration 5-2972
SQI_MODULE_ID enumeration 5-2973
SQI_XFER_CMD enumeration 5-2973
SQI_XFER_MODE enumeration 5-2974
ssd_demo 3-90
SSD1926 Graphics Controller Driver Library 5-333
SSL Client Support 5-3869
SSL Limitations 5-3870
SSL Server Support 5-3870
SSL TCP/IP Stack Library 5-3867
ssl.h 5-3879
ssl_config.h 5-3880
SSL_MAX_BUFFERS macro 5-3873
SSL_MAX_CONNECTIONS macro 5-3873
SSL_MAX_HASHES macro 5-3873
SSL_MAX_SESSIONS macro 5-3874
9 MPLAB Harmony Help
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SSL_MIN_SESSION_LIFETIME macro 5-3874
SSL_MODULE_CONFIG structure 5-3879
SSL_MULTIPLE_INTERFACES macro 5-3874
SSL_RSA_CLIENT_SIZE macro 5-3874
SSL_RSA_KEY_SIZE macro 5-3874
SSL_RSA_LIFETIME_EXTENSION macro 5-3874
SSL_VERSION macro 5-3875
SSL_VERSION_HI macro 5-3875
SSL_VERSION_LO macro 5-3875
Standard ID Message Format 5-1555
Standard Master Mode 5-2804
Standard Slave Mode 5-2805
Standard SPI Mode 5-2804
Start Here 1-1
State Machine 5-2255, 5-2485, 5-2707, 5-2802, 5-3088
State-Driven Applications 3-101
States 5-698
Static Configuration 5-3425
Status (including Channel) 5-1748
Support for Legacy "Ethernet Controller Library" 5-232, 5-1920
Supported Demonstration Boards 3-67, 3-69, 3-71, 3-73, 3-75,
3-86, 3-87, 3-89, 3-90, 3-103, 3-114, 3-115, 3-116, 3-117,
3-124, 3-143, 3-153, 3-154, 3-156, 3-158, 3-160, 3-161, 3-162,
3-164, 3-166, 3-167, 3-169
Supported Hardware 3-131, 3-133, 3-135
Supported Libraries 4-181
SW License Agreement 2-41, 3-64, 3-85, 3-99, 3-102, 3-113,
3-123, 3-130, 3-142, 3-150, 5-194, 5-227, 5-254, 5-289, 5-299,
5-309, 5-320, 5-334, 5-343, 5-368, 5-398, 5-419, 5-458, 5-512,
5-553, 5-606, 5-680, 5-695, 5-1111, 5-1128, 5-1168, 5-1276,
5-1312, 5-1362, 5-1472, 5-1520, 5-1554, 5-1668, 5-1734,
5-1865, 5-1904, 5-2060, 5-2172, 5-2203, 5-2253, 5-2289,
5-2331, 5-2428, 5-2479, 5-2594, 5-2663, 5-2688, 5-2705,
5-2762, 5-2799, 5-2892, 5-3012, 5-3086, 5-3170, 5-3320,
5-3348, 5-3363, 5-3377, 5-3420, 5-3439, 5-3466, 5-3501,
5-3530, 5-3539, 5-3546, 5-3570, 5-3575, 5-3598, 5-3615,
5-3625, 5-3637, 5-3647, 5-3655, 5-3660, 5-3690, 5-3698,
5-3709, 5-3718, 5-3748, 5-3771, 5-3795, 5-3799, 5-3806,
5-3809, 5-3822, 5-3859, 5-3868, 5-3881, 5-3913, 5-3918,
5-3931, 5-3955, 5-3966, 5-3978, 5-4005, 5-4061, 5-4101,
5-4131, 5-4169, 5-4180, 5-4200, 6-4226, 7-4230, 7-4232,
7-4234, 7-4236
Sync Mode Selection 5-463
Synchronizing Timer 5-2174
Synchronous External Clock Counter 5-3016
Synchronous Internal Clock Counter 5-3015
Synchronous Master Mode 5-3095
Synchronous Slave Mode 5-3097
sys_clk.h 5-3362
SYS_CLK_ClockFailureCallbackRegister function 5-3353
SYS_CLK_ClockFrequencyGet function 5-3355
SYS_CLK_ClockFrequencySet function 5-3355
SYS_CLK_ClockIsReady function 5-3356
SYS_CLK_FRCTune function 5-3356
SYS_CLK_FRCTUNING_DATA structure 5-3358
SYS_CLK_FRCTuningSet function 5-3357
SYS_CLK_INIT structure 5-3358
SYS_CLK_Initialize function 5-3354
SYS_CLK_MZPeriphBusFreqGet function 5-3357
SYS_CLK_OUTPUT enumeration 5-3359
SYS_CLK_SOURCE enumeration 5-3360
sys_common.h 5-3345
sys_devcon.h 5-3375
sys_devcon_config.h 5-3375
SYS_DEVCON_Deinitialize function 5-3369
SYS_DEVCON_HANDLE type 5-3373
SYS_DEVCON_INDEX_0 macro 5-3374
SYS_DEVCON_INIT structure 5-3374
SYS_DEVCON_Initialize function 5-3369
SYS_DEVCON_PerformanceConfig function 5-3370
SYS_DEVCON_PIC32MX_MAX_PB_FREQ macro 5-3368
SYS_DEVCON_PRIMARY_CLOCK macro 5-3368
SYS_DEVCON_Reinitialize function 5-3371
SYS_DEVCON_Status function 5-3371
SYS_DEVCON_SYSTEM_CLOCK macro 5-3368
SYS_DEVCON_Tasks function 5-3372
sys_fs.h 5-3418
SYS_FS_ERROR enumeration 5-3411
SYS_FS_FILE_OPEN_ATTRIBUTES enumeration 5-3412
SYS_FS_FILE_SEEK_CONTROL enumeration 5-3413
SYS_FS_FILE_SYSTEM_TYPE enumeration 5-3414
SYS_FS_FileClose function 5-3398
SYS_FS_FileEOF function 5-3399
SYS_FS_FileError function 5-3407
SYS_FS_FileNameGet function 5-3406
9 MPLAB Harmony Help
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SYS_FS_FileOpen function 5-3400
SYS_FS_FileRead function 5-3401
SYS_FS_FileSeek function 5-3401
SYS_FS_FileSize function 5-3402
SYS_FS_FileStat function 5-3403
SYS_FS_FileTell function 5-3404
SYS_FS_FileWrite function 5-3405
SYS_FS_FSTAT structure 5-3414
SYS_FS_FUNCTIONS structure 5-3415
SYS_FS_HANDLE type 5-3416
SYS_FS_HANDLE_INVALID macro 5-3417
SYS_FS_Initialize function 5-3407
SYS_FS_Mount function 5-3408
SYS_FS_REGISTRATION_TABLE structure 5-3416
SYS_FS_RESULT enumeration 5-3416
SYS_FS_Tasks 5-3397
SYS_FS_Tasks function 5-3410
SYS_FS_Unmount function 5-3410
SYS_Initialize function 5-3373
sys_int.h 5-3437
SYS_INT_Disable function 5-3429
SYS_INT_DynamicDeregister function 5-3428
SYS_INT_DynamicRegister function 5-3428
SYS_INT_Enable function 5-3430
SYS_INT_Initialize function 5-3427
SYS_INT_IsEnabled function 5-3430
SYS_INT_SourceDisable function 5-3431
SYS_INT_SourceEnable function 5-3432
SYS_INT_SourceIsEnabled function 5-3432
SYS_INT_SourceStatusClear function 5-3433
SYS_INT_SourceStatusGet function 5-3433
SYS_INT_SourceStatusSet function 5-3434
SYS_INT_TASKS_POINTER type 5-3437
SYS_INT_VectorPrioritySet function 5-3435
SYS_INT_VectorSubprioritySet function 5-3436
SYS_MEDIA_EVENT enumeration 5-415
sys_module.h 5-3346
SYS_MODULE_DATA structure 5-3334
SYS_MODULE_DEINITIALIZE_ROUTINE type 5-3335
SYS_MODULE_INDEX type 5-3335
SYS_MODULE_INIT union 5-3335
SYS_MODULE_INITIALIZE_ROUTINE type 5-3336
SYS_MODULE_INTERFACE structure 5-3337
SYS_MODULE_OBJ type 5-3338
SYS_MODULE_OBJ_INVALID macro 5-3342
SYS_MODULE_OBJ_STATIC macro 5-3343
SYS_MODULE_POWER_IDLE_RUN macro 5-3343
SYS_MODULE_POWER_IDLE_STOP macro 5-3343
SYS_MODULE_POWER_OFF macro 5-3344
SYS_MODULE_POWER_RUN_FULL macro 5-3344
SYS_MODULE_POWER_SLEEP macro 5-3344
SYS_MODULE_REINITIALIZE_ROUTINE type 5-3338
SYS_MODULE_STATUS_ROUTINE type 5-3339
SYS_MODULE_TASKS_DATA structure 5-3339
SYS_MODULE_TASKS_ROUTINE type 5-3340
SYS_MSB_MailboxClose function 5-3449
SYS_MSB_MailboxOpen function 5-3449
SYS_MSB_MailboxReinit function 5-3450
sys_msg.h 5-3463
SYS_MSG_BUFFER_SIZES macro 5-3458
sys_msg_config.h 5-3464
SYS_MSG_Deinitialize function 5-3445
SYS_MSG_GotMessages function 5-3454
SYS_MSG_ID2hMsgType function 5-3456
SYS_MSG_INIT structure 5-3459
SYS_MSG_Initialize function 5-3446
SYS_MSG_INSTANCE enumeration 5-3460
SYS_MSG_MAILBOXES_ADDONE macro 5-3462
SYS_MSG_MailboxMessagesGet function 5-3450
SYS_MSG_MailboxMsgAdd function 5-3451
SYS_MSG_MailboxMsgRemove function 5-3452
SYS_MSG_MAX_MAILBOXES macro 5-3458
SYS_MSG_MAX_MSGS_DELIVERED macro 5-3458
SYS_MSG_MAX_PRIORITY macro 5-3459
SYS_MSG_MAX_TYPES macro 5-3459
SYS_MSG_MessageDeliver function 5-3454
SYS_MSG_MessageReceive function 5-3455
SYS_MSG_MessageSend function 5-3456
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SYS_MSG_NUM_MAILBOX_BITMAPS macro 5-3463
SYS_MSG_OBJECT structure 5-3460
SYS_MSG_QUEUE_STATUS enumeration 5-3461
SYS_MSG_QueueStatus function 5-3457
SYS_MSG_RECEIVE_CALLBACK type 5-3461
SYS_MSG_RESULTS enumeration 5-3461
SYS_MSG_Tasks function 5-3447
SYS_MSG_TypeCreate function 5-3453
SYS_MSG_TypeRemove function 5-3453
SYS_MSG_VersionGet function 5-3447
SYS_MSG_VersionStrGet function 5-3448
SYS_MSGQ_ELEMENT structure 5-3462
SYS_OBJ_HANDLE type 5-286
SYS_OBJ_HANDLE_INVALID macro 5-286
SYS_OBJ_HANDLE_STATIC macro 5-286
sys_ports.h 5-3498
SYS_PORTS_ChangeNotificationDisable function 5-3489
SYS_PORTS_ChangeNotificationEnable function 5-3489
SYS_PORTS_ChangeNotificationGlobalDisable function 5-3490
SYS_PORTS_ChangeNotificationGlobalEnable function 5-3490
SYS_PORTS_ChangeNotificationInIdleModeDisable function
5-3491
SYS_PORTS_ChangeNotificationInIdleModeEnable function
5-3491
SYS_PORTS_ChangeNotificationPullDownDisable function
5-3491
SYS_PORTS_ChangeNotificationPullDownEnable function
5-3492
SYS_PORTS_ChangeNotificationPullUpDisable function 5-3493
SYS_PORTS_ChangeNotificationPullUpEnable function 5-3493
SYS_PORTS_ChangeNotificationStatus function 5-3494
SYS_PORTS_Clear function 5-3482
SYS_PORTS_DirectionGet function 5-3483
SYS_PORTS_DirectionSelect function 5-3483
SYS_PORTS_IOLockDisable function 5-3494
SYS_PORTS_IOLockEnable function 5-3495
SYS_PORTS_IOLockIsActive function 5-3495
SYS_PORTS_OpenDrainDisable function 5-3484
SYS_PORTS_OpenDrainEnable function 5-3484
SYS_PORTS_PIN_DIRECTION enumeration 5-3497
SYS_PORTS_PinClear function 5-3481
SYS_PORTS_PinDirectionSelect function 5-3481
SYS_PORTS_PinModeSelect function 5-3476
SYS_PORTS_PinOpenDrainDisable function 5-3476
SYS_PORTS_PinOpenDrainEnable function 5-3477
SYS_PORTS_PinPullUpDisable function 5-3477
SYS_PORTS_PinPullUpEnable function 5-3478
SYS_PORTS_PinRead function 5-3479
SYS_PORTS_PinSet function 5-3479
SYS_PORTS_PinToggle function 5-3480
SYS_PORTS_PinWrite function 5-3480
SYS_PORTS_PULLUP_PULLDOWN_STATUS enumeration
5-3497
SYS_PORTS_PullUpDisable function 5-3485
SYS_PORTS_PullUpEnable function 5-3486
SYS_PORTS_Read function 5-3486
SYS_PORTS_RemapInput function 5-3496
SYS_PORTS_RemapOutput function 5-3496
SYS_PORTS_Set function 5-3487
SYS_PORTS_Toggle function 5-3487
SYS_PORTS_Write function 5-3488
SYS_STATUS enumeration 5-3340
SYS_Tasks function 5-3333
SYS_TASKS_PRIORITY enumeration 5-3341
SYS_TASKS_PRIORITY_HIGH enumeration member 5-3341
SYS_TASKS_PRIORITY_INVALID enumeration member
5-3341
SYS_TASKS_PRIORITY_LOW enumeration member 5-3341
SYS_TASKS_PRIORITY_MEDIUM enumeration member
5-3341
sys_tmr.h 5-3528
SYS_TMR_AlarmPeriodGet function 5-3525
SYS_TMR_CALLBACK type 5-3525
SYS_TMR_CallbackPeriodic function 5-3522
SYS_TMR_CallbackSingle function 5-3523
SYS_TMR_CallbackStop function 5-3523
sys_tmr_config.h 5-3529
SYS_TMR_Deinitialize function 5-3518
SYS_TMR_DELAY_STATUS enumeration 5-3526
SYS_TMR_DelayMS function 5-3524
SYS_TMR_DelayStatusGet function 5-3524
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SYS_TMR_ERROR_TOLERANCE macro 5-3516
SYS_TMR_HANDLE type 5-3526
SYS_TMR_HANDLE_INVALID macro 5-3527
SYS_TMR_INDEX_0 macro 5-3527
SYS_TMR_INIT structure 5-3526
SYS_TMR_Initialize function 5-3519
SYS_TMR_INTERRUPT_MODE macro 5-3516
SYS_TMR_MAX_PERIODIC_EVENTS macro 5-3517
SYS_TMR_Reinitialize function 5-3520
SYS_TMR_RUNNING macro 5-3527
SYS_TMR_SINGLE_PERIODIC_EVENT macro 5-3517
SYS_TMR_Status function 5-3521
SYS_TMR_Tasks function 5-3521
SYS_TMR_TickCountGet function 5-3525
sys_wdt.h 5-3534
sys_wdt_config.h 5-3535
SYS_WDT_Disable function 5-3533
SYS_WDT_Enable function 5-3533
SYS_WDT_TimerClear function 5-3533
System Access 5-421
System Bus Peripheral Library 5-2762
System Config 5-476
System Configuration 5-428, 5-3390
System Configuration Functions 5-4173
System Initialization 5-195, 5-345, 5-370, 5-514, 5-608, 7-4229
System Interaction 5-459, 5-3365, 5-3507, 5-4170
System Overview 3-63
System Service Library Help 5-3332
System Service Overview 5-3332
system.h 5-3347
system_config.h 1-16
system_init.c 1-17
system_int.c 1-19
system_tasks.c 1-19
SYSTEMConfigPerformance function 7-4240
T
Table of Library Functions 5-1170, 5-1277
TAN macro 5-1055
Target Initialization 5-2765
TCP Changes 5-3548
TCP TCP/IP Stack Library 5-3880
tcp.h 5-3910
TCP/IP Demonstrations 3-130
TCP/IP Discoverer 5-3545
TCP/IP Library Overview 5-3536
TCP/IP Stack Library Help 5-3536
TCP/IP Stack Porting Guide 5-3545
TCP_ADJUST_FLAGS enumeration 5-3907
TCP_AUTO_TRANSMIT_TIMEOUT_VAL macro 5-3885
TCP_CLOSE_WAIT_TIMEOUT macro 5-3885
tcp_config.h 5-3912
TCP_DELAYED_ACK_TIMEOUT macro 5-3885
TCP_FIN_WAIT_2_TIMEOUT macro 5-3886
TCP_KEEP_ALIVE_TIMEOUT macro 5-3886
TCP_MAX_RETRIES macro 5-3886
TCP_MAX_SEG_SIZE_RX_LOCAL macro 5-3886
TCP_MAX_SEG_SIZE_RX_NON_LOCAL macro 5-3886
TCP_MAX_SEG_SIZE_TX macro 5-3887
TCP_MAX_SOCKETS macro 5-3887
TCP_MAX_SYN_RETRIES macro 5-3887
TCP_MAX_UNACKED_KEEP_ALIVES macro 5-3887
TCP_MODULE_CONFIG structure 5-3907
TCP_OPTION_LINGER_DATA structure 5-3908
TCP_PORT type 5-3908
TCP_SOCKET type 5-3908
TCP_SOCKET_DEFAULT_RX_SIZE macro 5-3887
TCP_SOCKET_DEFAULT_TX_SIZE macro 5-3888
TCP_SOCKET_INFO structure 5-3909
TCP_SOCKET_OPTION enumeration 5-3909
TCP_START_TIMEOUT_VAL macro 5-3888
TCP_TASK_TICK_RATE macro 5-3888
TCP_WINDOW_UPDATE_TIMEOUT_VAL macro 5-3888
tcpip_announce_config.h 5-3574
TCPIP_ANNOUNCE_DeInit function 5-3572
TCPIP_ANNOUNCE_Init function 5-3572
tcpip_announce_manager.h 5-3574
TCPIP_ANNOUNCE_MODULE_CONFIG structure 5-3573
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TCPIP_ANNOUNCE_Send function 5-3573
TCPIP_ANNOUNCE_Task function 5-3573
TCPIP_ANNOUNCE_TaskPending function 5-3573
TCPIP_ARP_CacheEntriesNoGet function 5-3589
TCPIP_ARP_CacheThresholdSet function 5-3590
TCPIP_ARP_CallbacksDeregister function 5-3581
TCPIP_ARP_CallbacksRegister function 5-3581
TCPIP_ARP_Deinitialize function 5-3582
TCPIP_ARP_ENTRY_QUERY structure 5-3592
TCPIP_ARP_ENTRY_TYPE enumeration 5-3592
TCPIP_ARP_EntryGet function 5-3582
TCPIP_ARP_EntryQuery function 5-3590
TCPIP_ARP_EntryRemove function 5-3583
TCPIP_ARP_EntryRemoveAll function 5-3591
TCPIP_ARP_EntryRemoveNet function 5-3584
TCPIP_ARP_EntrySet function 5-3588
TCPIP_ARP_EVENT_HANDLER type 5-3592
TCPIP_ARP_EVENT_TYPE enumeration 5-3593
TCPIP_ARP_HANDLE type 5-3593
TCPIP_ARP_HandlerDeRegister function 5-3584
TCPIP_ARP_HandlerRegister function 5-3585
TCPIP_ARP_Initialize function 5-3585
TCPIP_ARP_IsResolved function 5-3586
TCPIP_ARP_OPERATION_TYPE enumeration 5-3593
TCPIP_ARP_Probe function 5-3586
TCPIP_ARP_Process function 5-3589
TCPIP_ARP_Resolve function 5-3587
TCPIP_ARP_RESULT enumeration 5-3594
TCPIP_ARP_Task function 5-3588
TCPIP_ARP_TaskIsPending function 5-3588
TCPIP_DDNS_LastIPGet function 5-3649
TCPIP_DDNS_LastStatusGet function 5-3649
TCPIP_DDNS_ServiceSet function 5-3650
TCPIP_DDNS_UpdateForce function 5-3650
TCPIP_DHCP_Disable function 5-3618
TCPIP_DHCP_Enable function 5-3619
TCPIP_DHCP_EVENT_HANDLER type 5-3623
TCPIP_DHCP_EVENT_TYPE enumeration 5-3623
TCPIP_DHCP_HANDLE type 5-3623
TCPIP_DHCP_HandlerDeRegister function 5-3619
TCPIP_DHCP_HandlerRegister function 5-3619
TCPIP_DHCP_IsBound function 5-3621
TCPIP_DHCP_IsEnabled function 5-3621
TCPIP_DHCP_IsServerDetected function 5-3622
TCPIP_DHCP_Renew function 5-3620
TCPIP_DHCP_Request function 5-3620
TCPIP_DHCP_RequestTimeoutSet function 5-3621
TCPIP_DHCPS_Disable function 5-3630
TCPIP_DHCPS_Enable function 5-3631
TCPIP_DHCPS_GetPoolEntries function 5-3631
TCPIP_DHCPS_IsEnabled function 5-3633
TCPIP_DHCPS_LeaseEntryGet function 5-3632
TCPIP_DHCPS_RemovePoolEntries function 5-3632
TCPIP_DNS_IsResolved function 5-3641
TCPIP_DNS_Resolve function 5-3641
TCPIP_DNS_UsageBegin function 5-3642
TCPIP_DNS_UsageEnd function 5-3642
TCPIP_FTP_DATA_SKT_RX_BUFF_SIZE macro 5-3656
TCPIP_FTP_DATA_SKT_TX_BUFF_SIZE macro 5-3657
TCPIP_FTP_MAX_CONNECTIONS macro 5-3657
TCPIP_FTP_PASSWD_LEN macro 5-3657
TCPIP_FTP_PUT_ENABLED macro 5-3657
TCPIP_FTP_USER_NAME_LEN macro 5-3657
TCPIP_HTTP_ActiveConnectionCountGet function 5-3666
TCPIP_HTTP_ArgGet function 5-3667
TCPIP_HTTP_CurrentConnectionByteCountDec function
5-3668
TCPIP_HTTP_CurrentConnectionByteCountGet function 5-3668
TCPIP_HTTP_CurrentConnectionByteCountSet function 5-3669
TCPIP_HTTP_CurrentConnectionCallbackPosGet function
5-3669
TCPIP_HTTP_CurrentConnectionCallbackPosSet function
5-3670
TCPIP_HTTP_CurrentConnectionDataBufferGet function 5-3670
TCPIP_HTTP_CurrentConnectionFileGet function 5-3671
TCPIP_HTTP_CurrentConnectionHasArgsSet function 5-3671
TCPIP_HTTP_CurrentConnectionIsAuthorizedGet function
5-3672
TCPIP_HTTP_CurrentConnectionIsAuthorizedSet function
5-3672
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TCPIP_HTTP_CurrentConnectionPostSmGet function 5-3673
TCPIP_HTTP_CurrentConnectionPostSmSet function 5-3673
TCPIP_HTTP_CurrentConnectionSocketGet function 5-3674
TCPIP_HTTP_CurrentConnectionStatusSet function 5-3675
TCPIP_HTTP_CurrentConnectionUserDataGet function 5-3675
TCPIP_HTTP_CurrentConnectionUserDataSet function 5-3676
TCPIP_HTTP_FileInclude function 5-3676
TCPIP_HTTP_PostNameRead function 5-3677
TCPIP_HTTP_PostValueRead function 5-3678
TCPIP_HTTP_URLDecode function 5-3679
TCPIP_ICMP_CallbackDeregister function 5-3693
TCPIP_ICMP_CallbackRegister function 5-3693
TCPIP_ICMP_EchoRequestSend function 5-3694
TCPIP_ICMPV6_CallbackDeregister function 5-3701
TCPIP_ICMPV6_CallbackRegister function 5-3702
TCPIP_ICMPV6_Close function 5-3702
TCPIP_ICMPV6_Flush function 5-3702
TCPIP_ICMPV6_HeaderEchoRequestPut function 5-3703
TCPIP_ICMPV6_PutHeaderEchoReply macro 5-3704
TCPIP_IF_PIC32INT macro 5-262
TCPIP_IPV4_PacketFormatTx function 5-3712
TCPIP_IPV4_PacketGetDestAddress function 5-3713
TCPIP_IPV4_PacketGetSourceAddress function 5-3713
TCPIP_IPV4_PacketTransmit function 5-3714
TCPIP_IPV4_SelectSourceInterface function 5-3714
TCPIP_IPV6_AddressUnicastRemove function 5-3725
TCPIP_IPV6_ArrayGet function 5-3725
TCPIP_IPV6_ArrayPutHelper function 5-3726
TCPIP_IPV6_DASSourceAddressSelect function 5-3726
TCPIP_IPV6_DestAddressGet function 5-3727
TCPIP_IPV6_DestAddressSet function 5-3727
TCPIP_IPV6_Flush function 5-3728
TCPIP_IPV6_Get function 5-3728
TCPIP_IPV6_HandlerDeregister function 5-3728
TCPIP_IPV6_HandlerRegister function 5-3729
TCPIP_IPV6_InterfaceIsReady function 5-3729
TCPIP_IPV6_MulticastListenerAdd function 5-3730
TCPIP_IPV6_MulticastListenerRemove function 5-3730
TCPIP_IPV6_PacketFree function 5-3731
TCPIP_IPV6_PayloadSet function 5-3731
TCPIP_IPV6_Put function 5-3732
TCPIP_IPV6_PutArray macro 5-3738
TCPIP_IPV6_SourceAddressGet function 5-3732
TCPIP_IPV6_SourceAddressSet function 5-3733
TCPIP_IPV6_TxIsPutReady function 5-3733
TCPIP_IPV6_TxPacketAllocate function 5-3734
TCPIP_IPV6_UnicastAddressAdd function 5-3734
TCPIP_IPV6_UniqueLocalUnicastAddressAdd function 5-3735
TCPIP_LOCAL_MASK_TYPE enumeration 5-3793
tcpip_mac.h 5-3770
TCPIP_MAC_ACTION enumeration 5-3757
TCPIP_MAC_ADDR structure 5-3758
TCPIP_MAC_Close function 5-3753
tcpip_mac_config.h 5-3770
TCPIP_MAC_DATA_SEGMENT type 5-3758
TCPIP_MAC_Deinitialize function 5-3753
TCPIP_MAC_ETHERNET_HEADER structure 5-3758
TCPIP_MAC_EVENT enumeration 5-3758
TCPIP_MAC_EventAcknowledge function 5-3753
TCPIP_MAC_EventF type 5-3760
TCPIP_MAC_EventMaskSet function 5-3753
TCPIP_MAC_EventPendingGet function 5-3754
TCPIP_MAC_HANDLE type 5-3761
TCPIP_MAC_HEAP_CallocF type 5-3761
TCPIP_MAC_HEAP_FreeF type 5-3761
TCPIP_MAC_HEAP_HANDLE type 5-3762
TCPIP_MAC_HEAP_MallocF type 5-3762
TCPIP_MAC_Initialize function 5-3754
TCPIP_MAC_LinkCheck function 5-3754
TCPIP_MAC_MODULE_CTRL structure 5-3762
TCPIP_MAC_Open function 5-3754
TCPIP_MAC_PACKET type 5-3763
TCPIP_MAC_PACKET_ACK_FUNC type 5-3763
TCPIP_MAC_PACKET_FLAGS enumeration 5-3763
TCPIP_MAC_PACKET_RX_STAT structure 5-3764
TCPIP_MAC_PacketRx function 5-3754
TCPIP_MAC_PacketTx function 5-3755
TCPIP_MAC_PKT_ACK_RES enumeration 5-3765
9 MPLAB Harmony Help
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TCPIP_MAC_PKT_AckF type 5-3766
TCPIP_MAC_PKT_AllocF type 5-3766
TCPIP_MAC_PKT_FreeF type 5-3766
TCPIP_MAC_POWER_MODE enumeration 5-3766
TCPIP_MAC_Process function 5-3756
TCPIP_MAC_PROCESS_FLAGS enumeration 5-3767
TCPIP_MAC_Reinitialize function 5-3757
TCPIP_MAC_RES enumeration 5-3767
TCPIP_MAC_RxFilterHashTableEntrySet function 5-3757
TCPIP_MAC_SEGMENT_FLAGS enumeration 5-3768
tcpip_manager.h 5-3793
TCPIP_MDNS_ServiceDeregister function 5-3958
TCPIP_MDNS_ServiceRegister function 5-3959
TCPIP_MDNS_ServiceUpdate function 5-3960
TCPIP_MODULE_MAC_97J60_CONFIG structure 5-3768
TCPIP_MODULE_MAC_ENCJ60_CONFIG structure 5-3768
TCPIP_MODULE_MAC_ENCJ600_CONFIG structure 5-3769
TCPIP_MODULE_MAC_MRF24W_CONFIG structure 5-3769
TCPIP_MODULE_MAC_PIC32INT_CONFIG structure 5-3769
TCPIP_NDP_NborReachConfirm function 5-3804
TCPIP_NET_HANDLE type 5-3793
tcpip_reboot_config.h 5-3808
TCPIP_SMTP_ArrayPut function 5-3815
TCPIP_SMTP_Flush function 5-3816
TCPIP_SMTP_IsBusy function 5-3816
TCPIP_SMTP_IsPutReady function 5-3816
TCPIP_SMTP_MailSend function 5-3817
TCPIP_SMTP_Put function 5-3817
TCPIP_SMTP_PutIsDone function 5-3818
TCPIP_SMTP_StringPut function 5-3818
TCPIP_SMTP_UsageBegin function 5-3818
TCPIP_SMTP_UsageEnd function 5-3819
TCPIP_SNMP_ClientGetNet function 5-3834
TCPIP_SNMP_DataCopyToProcessBuffer function 5-3834
TCPIP_SNMP_DCPT structure 5-3851
TCPIP_SNMP_EventNotifyGet function 5-3835
TCPIP_SNMP_Notify function 5-3835
TCPIP_SNMP_NotifyIsReady function 5-3836
TCPIP_SNMP_NotifyPrepare function 5-3837
TCPIP_SNMP_PacketProcStubPtrsGet function 5-3837
TCPIP_SNMP_ProcessBufferDataGet function 5-3838
TCPIP_SNMP_ReadCommunityGet function 5-3838
TCPIP_SNMP_SM enumeration 5-3852
TCPIP_SNMP_TrapTimeGet function 5-3839
TCPIP_SNMP_WriteCommunityGet function 5-3839
TCPIP_SNMPv3_CmprTrapSecNameAndSecLvlWithUSMDb
function 5-3845
TCPIP_SNMPv3_Notify function 5-3839
TCPIP_SNMPV3_PacketProcStubPtrsGet function 5-3840
TCPIP_SNTP_ConnectionInitiate function 5-3863
TCPIP_SNTP_ConnectionParamSet function 5-3863
TCPIP_SNTP_LastErrorGet function 5-3864
TCPIP_SNTP_TimeStampGet function 5-3864
TCPIP_SNTP_UTCSecondsGet function 5-3865
TCPIP_STACK_Deinitialize function 5-3774
TCPIP_STACK_IndexToNet function 5-3777
TCPIP_STACK_Initialize function 5-3774
TCPIP_STACK_ModuleGetConfig function 5-3783
TCPIP_STACK_NetAddress function 5-3784
TCPIP_STACK_NetAddressBcast function 5-3784
TCPIP_STACK_NetAddressDnsPrimary function 5-3785
TCPIP_STACK_NetAddressDnsPrimarySet function 5-3785
TCPIP_STACK_NetAddressDnsSecond function 5-3786
TCPIP_STACK_NetAddressDnsSecondSet function 5-3786
TCPIP_STACK_NetAddressGateway function 5-3787
TCPIP_STACK_NetAddressGatewaySet function 5-3787
TCPIP_STACK_NetAddressMac function 5-3788
TCPIP_STACK_NetAddressMacSet function 5-3788
TCPIP_STACK_NetAddressSet function 5-3789
TCPIP_STACK_NetBIOSName function 5-3777
TCPIP_STACK_NetBiosNameSet function 5-3778
TCPIP_STACK_NetConfigGet function 5-3790
TCPIP_STACK_NetConfigSet function 5-3791
TCPIP_STACK_NetDefaultGet function 5-3778
TCPIP_STACK_NetDefaultSet function 5-3779
TCPIP_STACK_NetDown function 5-3781
TCPIP_STACK_NetHandleGet function 5-3779
TCPIP_STACK_NetIndexGet function 5-3780
TCPIP_STACK_NetIPv6AddressGet function 5-3790
9 MPLAB Harmony Help
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TCPIP_STACK_NetIsLinked function 5-3782
TCPIP_STACK_NetIsUp function 5-3782
TCPIP_STACK_NetMACId function 5-3792
TCPIP_STACK_NetMask function 5-3780
TCPIP_STACK_NetNameGet function 5-3780
TCPIP_STACK_NetUp function 5-3783
TCPIP_STACK_NumberOfNetworksGet function 5-3781
TCPIP_STACK_SetLocalMasks function 5-3775
TCPIP_STACK_SetLocalMasksType function 5-3776
TCPIP_STACK_Task function 5-3777
TCPIP_STACK_USE_BASE64_DECODE macro 5-3665
TCPIP_TCP_Abort function 5-3897
TCPIP_TCP_ArrayFind function 5-3901
TCPIP_TCP_ArrayGet function 5-3902
TCPIP_TCP_ArrayPeek function 5-3902
TCPIP_TCP_ArrayPut function 5-3898
TCPIP_TCP_Bind function 5-3890
TCPIP_TCP_ClientOpen function 5-3891
TCPIP_TCP_Close function 5-3891
TCPIP_TCP_Connect function 5-3892
TCPIP_TCP_Discard function 5-3903
TCPIP_TCP_Disconnect function 5-3892
TCPIP_TCP_FifoRxFreeGet function 5-3906
TCPIP_TCP_FifoRxFullGet macro 5-3906
TCPIP_TCP_FifoSizeAdjust function 5-3903
TCPIP_TCP_FifoTxFreeGet macro 5-3907
TCPIP_TCP_FifoTxFullGet function 5-3899
TCPIP_TCP_Find function 5-3904
TCPIP_TCP_Flush function 5-3899
TCPIP_TCP_Get function 5-3905
TCPIP_TCP_GetIsReady function 5-3905
TCPIP_TCP_IsConnected function 5-3893
TCPIP_TCP_OptionsGet function 5-3893
TCPIP_TCP_OptionsSet function 5-3894
TCPIP_TCP_Peek function 5-3905
TCPIP_TCP_Put function 5-3899
TCPIP_TCP_PutIsReady function 5-3900
TCPIP_TCP_RemoteBind function 5-3894
TCPIP_TCP_ServerOpen function 5-3895
TCPIP_TCP_SocketInfoGet function 5-3896
TCPIP_TCP_SocketIsSecuredBySSL function 5-3876
TCPIP_TCP_SocketNetGet function 5-3896
TCPIP_TCP_SocketNetSet function 5-3898
TCPIP_TCP_StringPut function 5-3900
TCPIP_TCP_WasReset function 5-3896
TCPIP_TCPSSL_ClientBegin function 5-3876
TCPIP_TCPSSL_ClientStart function 5-3877
TCPIP_TCPSSL_HandshakeClear function 5-3877
TCPIP_TCPSSL_ListenerAdd function 5-3878
TCPIP_TCPSSL_ServerStart function 5-3878
TCPIP_TCPSSL_StillHandshaking function 5-3879
TCPIP_TFTP_DataByteGet function 5-3922
TCPIP_TFTP_DataBytePut function 5-3923
TCPIP_TFTP_DataIsGetReady function 5-3923
TCPIP_TFTP_FileClose function 5-3923
TCPIP_TFTP_FileIsClosed function 5-3923
TCPIP_TFTP_FileIsOpen function 5-3923
TCPIP_TFTP_FragRAMFileUploadToHost function 5-3923
TCPIP_TFTP_IsOpen function 5-3924
TCPIP_TFTP_IsReadyForPut function 5-3924
TCPIP_TFTP_Open function 5-3924
TCPIP_TFTP_RAMFileUploadToHost function 5-3924
TCPIP_TFTP_UploadStatusGet function 5-3924
TCPIP_UDP_ArrayGet function 5-3944
TCPIP_UDP_ArrayPut function 5-3947
TCPIP_UDP_BcastIPV4AddressSet function 5-3937
TCPIP_UDP_Bind function 5-3937
TCPIP_UDP_ClientOpen function 5-3938
TCPIP_UDP_Close function 5-3938
TCPIP_UDP_DestinationIPAddressSet function 5-3939
TCPIP_UDP_Discard function 5-3948
TCPIP_UDP_Flush function 5-3945
TCPIP_UDP_Get function 5-3949
TCPIP_UDP_GetIsReady function 5-3949
TCPIP_UDP_IsConnected function 5-3939
TCPIP_UDP_IsOpened macro 5-3950
TCPIP_UDP_OptionsGet function 5-3940
TCPIP_UDP_OptionsSet function 5-3940
9 MPLAB Harmony Help
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TCPIP_UDP_Put function 5-3945
TCPIP_UDP_RemoteBind function 5-3941
TCPIP_UDP_RxOffsetSet function 5-3949
TCPIP_UDP_ServerOpen function 5-3942
TCPIP_UDP_SocketInfoGet function 5-3942
TCPIP_UDP_SocketNetGet function 5-3942
TCPIP_UDP_SocketNetSet function 5-3943
TCPIP_UDP_SourceIPAddressSet function 5-3943
TCPIP_UDP_StringPut function 5-3946
TCPIP_UDP_TxCountGet function 5-3946
TCPIP_UDP_TxOffsetSet function 5-3944
TCPIP_UDP_TxPutIsReady function 5-3947
TCPIP_ZCLL_Disable function 5-3960
TCPIP_ZCLL_Enable function 5-3961
TCPIP_ZCLL_IsEnabled function 5-3961
TE_ROUNDEDBUTTON_RADIUS macro 5-1055
Telnet TCP/IP Stack Library 5-3913
telnet.h 5-3917
telnet_config.h 5-3917
TELNET_MODULE_CONFIG structure 5-3916
TELNET_PASSWORD macro 5-3915
TELNET_PORT macro 5-3915
TELNET_USERNAME macro 5-3915
TELNETS_PORT macro 5-3916
TFTP TCP/IP Stack Library 5-3917
TFTP_ACCESS_ERROR type 5-3928
TFTP_ARP_TIMEOUT_VAL macro 5-3920
TFTP_BLOCK_SIZE macro 5-3920
TFTP_BLOCK_SIZE_MSB macro 5-3920
TFTP_CHUNK_DESCRIPTOR structure 5-3928
TFTP_CLIENT_PORT macro 5-3921
TFTP_FILE_MODE type 5-3928
TFTP_GET_TIMEOUT_VAL macro 5-3921
TFTP_MAX_RETRIES macro 5-3921
TFTP_RESULT type 5-3928
TFTP_SERVER_PORT macro 5-3921
TFTP_UPLOAD_COMPLETE macro 5-3925
TFTP_UPLOAD_CONNECT macro 5-3925
TFTP_UPLOAD_CONNECT_TIMEOUT macro 5-3925
TFTP_UPLOAD_GET_DNS macro 5-3925
TFTP_UPLOAD_HOST_RESOLVE_TIMEOUT macro 5-3925
TFTP_UPLOAD_RESOLVE_HOST macro 5-3926
TFTP_UPLOAD_SEND_DATA macro 5-3926
TFTP_UPLOAD_SEND_FILENAME macro 5-3926
TFTP_UPLOAD_SERVER_ERROR macro 5-3926
TFTP_UPLOAD_WAIT_FOR_CLOSURE macro 5-3926
tftpc.h 5-3929
tftpc_config.h 5-3930
TFTPClose macro 5-3926
TFTPGetError macro 5-3927
TFTPIsFileOpenReady macro 5-3927
TFTPOpenFile function 5-3925
The Application File(s) 1-13
The Main File 1-12
Third-Party Library Help 6-4225
Third-Party Library Overview 6-4226
Thread Operation 5-1316
Timer Driver Library 5-457
Timer Peripheral Library 5-3011
Timer System Service Library 5-3500
tIPV6_SNMP_TRAP_INFO structure 5-3848
TMR_ASSIGNMENT enumeration 5-3060
TMR_CLOCK_SOURCE enumeration 5-3060
TMR_CLOCK_SOURCE_EDGE enumeration 5-3060
TMR_GATE_POLARITY enumeration 5-3061
TMR_GATE_SOURCE enumeration 5-3061
TMR_MODULE_ID enumeration 5-3062
TMR_POSTSCALE enumeration 5-3062
TMR_PRESCALE enumeration 5-3063
TPL_MATCH_VID_PID macro 5-4196
Transfer Abort 5-573
Transfer Operation 5-372
Transfer Requests 5-565
Transfer Status 5-572
Transfer/Abort (Asynchronous) Trigger Management 5-1737
Transfer/Abort (Synchronous) 5-1737
Transferring Data 5-3984
Transitions 5-1122
9 MPLAB Harmony Help
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Transmit 5-1918
Transmitting a CAN Message 5-1561
TRAP_COMMUNITY_MAX_LEN macro 5-3831
TRAP_TABLE_SIZE macro 5-3831
tSNMP_TRAP_INFO structure 5-3850
Tutorial 2-49
U
uC_OS_III_basic_demo 3-115
UDP Changes 5-3550
UDP TCP/IP Stack Library 5-3930
udp.h 5-3953
udp_config.h 5-3954
UDP_LOCAL_PORT_END_NUMBER macro 5-3933
UDP_LOCAL_PORT_START_NUMBER macro 5-3934
UDP_MAX_SOCKETS macro 5-3934
UDP_MODULE_CONFIG structure 5-3950
UDP_PORT type 5-3951
UDP_SOCKET type 5-3951
UDP_SOCKET_BCAST_TYPE enumeration 5-3951
UDP_SOCKET_DEFAULT_TX_QUEUE_LIMIT macro 5-3934
UDP_SOCKET_DEFAULT_TX_SIZE macro 5-3934
UDP_SOCKET_INFO structure 5-3951
UDP_SOCKET_OPTION enumeration 5-3952
UDP_SOCKET_POOL_BUFFER_SIZE macro 5-3934
UDP_SOCKET_POOL_BUFFERS macro 5-3935
UDP_USE_RX_CHECKSUM macro 5-3935
UDP_USE_TX_CHECKSUM macro 5-3935
UDPIsPutReady function 5-3948
uint16_gfx_image_prog type 5-940
uint16_prog type 5-940
uint16_prog_pack type 5-940
uint32_gfx_image_prog type 5-940
uint32_prog type 5-940
uint32_prog_pack type 5-940
uint8_gfx_image_prog type 5-941
uint8_prog type 5-941
uint8_prog_pack type 5-941
Upgrading from the MLA Graphics Library to the MPLAB
Harmony Graphics Library 5-681
Upgrading from the V5 TCP/IP Stack to the MPLAB Harmony
TCP/IP Stack 5-3546
Uploading Pre-built MPFS2 Images 5-3543
USART Driver Demonstration 3-142
USART Driver Library 5-510
USART Peripheral Library 5-3085
USART_BAUD_RATE_MODE enumeration 5-3140
USART_HANDSHAKE_MODE enumeration 5-3140
USART_LINECONTROL_MODE enumeration 5-3140
USART_MODULE_ID enumeration 5-3141
USART_OPERATION_MODE enumeration 5-3142
USART_RECEIVE_INTR_MODE enumeration 5-3142
USART_RECEIVE_MODES enumeration 5-3142
USART_SYNC_CLOCK_SOURCE enumeration 5-3143
USART_SYNC_MODES enumeration 5-3143
USART_TRANSMIT_INTR_MODE enumeration 5-3144
USB Audio Device Library 5-3977
USB Buffers and the Buffer Descriptor Table (BDT) 5-3175
USB CDC Host Library 5-4199
USB Demonstrations 3-149
USB Device CDC Library 5-4060
USB Device Layer Library 5-4004
USB Device Library - Application Interaction 5-3968
USB Device Library - Getting Started 5-3963
USB Device Library Architecture 5-3966
USB Device Stack Migration Guide 5-3973
USB Driver Library 5-552
USB Generic Device Library 5-4100
USB HID Device Library 5-4130
USB Host Layer Library 5-4179
USB Library Help 5-3963
USB MSD Device Library 5-4168
USB Peripheral Library 5-3167
USB Setup Example 5-3179
USB_BUFFER_DATA01 enumeration 5-3278
USB_BUFFER_DIRECTION enumeration 5-3278
USB_BUFFER_PING_PONG enumeration 5-3279
USB_BUFFER_SCHEDULE_DATA01 enumeration 5-3279
usb_device.h 5-4057
9 MPLAB Harmony Help
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USB_DEVICE_Attach function 5-4033
usb_device_audio.h 5-4002
USB_DEVICE_AUDIO_CONTROL_TRANSFER_HANDLE type
5-3995
USB_DEVICE_AUDIO_ControlReceive function 5-3987
USB_DEVICE_AUDIO_ControlSend function 5-3988
USB_DEVICE_AUDIO_ControlStatus function 5-3990
USB_DEVICE_AUDIO_EP_INSTANCE structure 5-3995
USB_DEVICE_AUDIO_EVENT enumeration 5-3996
USB_DEVICE_AUDIO_EVENT_DATA_READ_COMPLETE
structure 5-3997
USB_DEVICE_AUDIO_EVENT_DATA_WRITE_COMPLETE
structure 5-3997
USB_DEVICE_AUDIO_EVENT_HANDLER type 5-3997
USB_DEVICE_AUDIO_EVENT_RESPONSE type 5-3998
USB_DEVICE_AUDIO_EVENT_RESPONSE_NONE macro
5-3994
USB_DEVICE_AUDIO_EventHandlerSet function 5-3991
USB_DEVICE_AUDIO_INDEX type 5-3998
USB_DEVICE_AUDIO_INSTANCE structure 5-3998
USB_DEVICE_AUDIO_INSTANCE_STATE enumeration
5-3999
USB_DEVICE_AUDIO_INTERFACE_COLLECTION structure
5-3999
USB_DEVICE_AUDIO_INTERFACE_INFO structure 5-3999
USB_DEVICE_AUDIO_INTERFACE_TYPE enumeration
5-4000
USB_DEVICE_AUDIO_IRP_OBJECT structure 5-4000
USB_DEVICE_AUDIO_Read function 5-3992
USB_DEVICE_AUDIO_RESULT enumeration 5-4000
USB_DEVICE_AUDIO_STREAMING_INTERFACE structure
5-4001
USB_DEVICE_AUDIO_STREAMING_INTERFACE_ALTERNAT
E_SETTING
structure 5-4001
USB_DEVICE_AUDIO_TRANSFER_HANDLE type 5-4002
USB_DEVICE_AUDIO_TRANSFER_HANDLE_INVALID macro
5-3995
USB_DEVICE_AUDIO_Write function 5-3993
USB_DEVICE_CALLBACK type 5-4048
usb_device_cdc.h 5-4098
USB_DEVICE_CDC_CONTROL_TRANSFER_HANDLE type
5-4089
USB_DEVICE_CDC_ControlReceive function 5-4076
USB_DEVICE_CDC_ControlSend function 5-4078
USB_DEVICE_CDC_ControlStatus function 5-4080
USB_DEVICE_CDC_EVENT enumeration 5-4089
USB_DEVICE_CDC_EVENT_DATA_GET_LINE_CODING type
5-4092
USB_DEVICE_CDC_EVENT_DATA_READ_COMPLETE
structure 5-4092
USB_DEVICE_CDC_EVENT_DATA_SEND_BREAK structure
5-4092
USB_DEVICE_CDC_EVENT_DATA_SERIAL_STATE_NOTIFIC
ATION_COMPLETE
structure 5-4093
USB_DEVICE_CDC_EVENT_DATA_SET_CONTROL_LINE_S
TATE
type 5-4093
USB_DEVICE_CDC_EVENT_DATA_SET_LINE_CODING type
5-4093
USB_DEVICE_CDC_EVENT_DATA_WRITE_COMPLETE
structure 5-4094
USB_DEVICE_CDC_EVENT_HANDLER type 5-4094
USB_DEVICE_CDC_EVENT_RESPONSE type 5-4095
USB_DEVICE_CDC_EVENT_RESPONSE_NONE macro
5-4097
USB_DEVICE_CDC_EventHandlerSet function 5-4082
USB_DEVICE_CDC_INDEX type 5-4095
USB_DEVICE_CDC_INIT structure 5-4095
USB_DEVICE_CDC_Read function 5-4084
USB_DEVICE_CDC_RESULT enumeration 5-4095
USB_DEVICE_CDC_SERIAL_STATE_NOTIFICATION_DATA
type 5-4096
USB_DEVICE_CDC_SerialStateNotificationSend function
5-4085
USB_DEVICE_CDC_TRANSFER_FLAGS enumeration 5-4096
USB_DEVICE_CDC_TRANSFER_HANDLE type 5-4097
USB_DEVICE_CDC_TRANSFER_HANDLE_INVALID macro
5-4097
USB_DEVICE_CDC_Write function 5-4086
USB_DEVICE_ClientStatus function 5-4036
USB_DEVICE_Close function 5-4026
USB_DEVICE_CONFIG_DESCS_PTR type 5-4049
usb_device_config_template.h 5-4059
USB_DEVICE_CONTROL_STATUS enumeration 5-4049
USB_DEVICE_CONTROL_TRANSFER_CALLBACK type
5-4049
9 MPLAB Harmony Help
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USB_DEVICE_CONTROL_TRANSFER_EVENT enumeration
5-4050
USB_DEVICE_CONTROL_TRANSFER_EVENT_DATA union
5-4050
USB_DEVICE_CONTROL_TRANSFER_HANDLE type 5-4050
USB_DEVICE_CONTROL_TRANSFER_RESULT enumeration
5-4051
USB_DEVICE_ControlEventCallBackSet function 5-4028
USB_DEVICE_ControlReceive function 5-4032
USB_DEVICE_ControlSend function 5-4033
USB_DEVICE_ControlStatus function 5-4040
USB_DEVICE_Deinitialize function 5-4026
USB_DEVICE_Detach function 5-4034
USB_DEVICE_ENDPOINT_TABLE_SIZE macro 5-4057
USB_DEVICE_EndpointDisable function 5-4030
USB_DEVICE_EndpointEnable function 5-4040
USB_DEVICE_EndpointIsEnabled function 5-4042
USB_DEVICE_EndpointIsStalled function 5-4042
USB_DEVICE_EndpointStall function 5-4043
USB_DEVICE_EndpointStallClear function 5-4044
USB_DEVICE_EVENT enumeration 5-4051
USB_DEVICE_EVENT_DATA union 5-4052
USB_DEVICE_EVENT_DATA_CONFIGURED structure 5-4052
USB_DEVICE_EventCallBackSet function 5-4031
USB_DEVICE_FUNC_REGISTRATION_TABLE structure
5-4052
USB_DEVICE_FUNCTION_DRIVER structure 5-4053
usb_device_generic.h 5-4129
USB_DEVICE_GENERIC_EndpointIsEnabled function 5-4121
USB_DEVICE_GENERIC_EndpointRead function 5-4122
USB_DEVICE_GENERIC_EndpointStall function 5-4122
USB_DEVICE_GENERIC_EndpointStallClear function 5-4123
USB_DEVICE_GENERIC_EndpointStallStatusGet function
5-4123
USB_DEVICE_GENERIC_EndpointWrite function 5-4124
USB_DEVICE_GENERIC_EVENT enumeration 5-4125
USB_DEVICE_GENERIC_EVENT_DATA union 5-4125
USB_DEVICE_GENERIC_EVENT_DATA_CONTROL_TRANSF
ER_SETUP_REQUEST
structure 5-4126
USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_READ_
COMPLETE
structure 5-4126
USB_DEVICE_GENERIC_EVENT_DATA_ENDPOINT_WRITE_
COMPLETE
structure 5-4127
USB_DEVICE_GENERIC_EVENT_HANDLER type 5-4127
USB_DEVICE_GENERIC_EVENT_RESPONSE type 5-4127
USB_DEVICE_GENERIC_EventHandlerSet function 5-4124
USB_DEVICE_GENERIC_INDEX type 5-4128
USB_DEVICE_GENERIC_RESULT enumeration 5-4128
USB_DEVICE_GENERIC_TRANSFER_FLAG enumeration
5-4128
USB_DEVICE_GENERIC_TRANSFER_HANDLE type 5-4129
USB_DEVICE_GetConfigurationValue function 5-4039
USB_DEVICE_GetDeviceSpeed function 5-4037
USB_DEVICE_GetDeviceState function 5-4038
USB_DEVICE_HANDLE type 5-4053
USB_DEVICE_HANDLE_INVALID macro 5-4057
usb_device_hid.h 5-4166
usb_device_hid_config_template..h 5-4168
USB_DEVICE_HID_CONTROL_STATUS enumeration 5-4152
USB_DEVICE_HID_CONTROL_TRANSFER_HANDLE type
5-4153
USB_DEVICE_HID_ControlReceive function 5-4142
USB_DEVICE_HID_ControlSend function 5-4144
USB_DEVICE_HID_ControlStatus function 5-4146
USB_DEVICE_HID_EVENT enumeration 5-4153
USB_DEVICE_HID_EVENT_DATA_GET_IDLE structure
5-4160
USB_DEVICE_HID_EVENT_DATA_GET_PROTOCOL
structure 5-4160
USB_DEVICE_HID_EVENT_DATA_GET_REPORT structure
5-4160
USB_DEVICE_HID_EVENT_DATA_REPORT_RECEIVED
structure 5-4161
USB_DEVICE_HID_EVENT_DATA_REPORT_SENT structure
5-4161
USB_DEVICE_HID_EVENT_DATA_SET_DESCRIPTOR
structure 5-4162
USB_DEVICE_HID_EVENT_DATA_SET_IDLE structure 5-4162
USB_DEVICE_HID_EVENT_DATA_SET_PROTOCOL
structure 5-4162
USB_DEVICE_HID_EVENT_DATA_SET_REPORT structure
5-4163
USB_DEVICE_HID_EVENT_HANDLER type 5-4163
9 MPLAB Harmony Help
iiii
USB_DEVICE_HID_EVENT_RESPONSE type 5-4164
USB_DEVICE_HID_EVENT_RESPONSE_NONE macro 5-4165
USB_DEVICE_HID_EventHandlerSet function 5-4148
USB_DEVICE_HID_INDEX type 5-4164
USB_DEVICE_HID_INIT structure 5-4164
USB_DEVICE_HID_INSTANCES_NUMBER macro 5-4166
USB_DEVICE_HID_QUEUE_DEPTH_COMINED macro 5-4166
USB_DEVICE_HID_ReportReceive function 5-4149
USB_DEVICE_HID_ReportSend function 5-4151
USB_DEVICE_HID_RESULT enumeration 5-4165
USB_DEVICE_HID_TRANSFER_HANDLE type 5-4165
USB_DEVICE_HID_TRANSFER_HANDLE_INVALID macro
5-4166
USB_DEVICE_INDEX_0 macro 5-4047
USB_DEVICE_INDEX_1 macro 5-4047
USB_DEVICE_INDEX_2 macro 5-4048
USB_DEVICE_INDEX_3 macro 5-4048
USB_DEVICE_INDEX_4 macro 5-4048
USB_DEVICE_INDEX_5 macro 5-4048
USB_DEVICE_INDEX_COUNT macro 5-4048
USB_DEVICE_INFORMATION structure 5-4194
USB_DEVICE_INIT structure 5-4054
USB_DEVICE_Initialize function 5-4027
USB_DEVICE_IRPCancelAll function 5-4044
USB_DEVICE_IRPSubmit function 5-4045
USB_DEVICE_MAX_CLIENTS macro 5-4023
USB_DEVICE_MAX_FUNCTION_DRIVER macro 5-4023
USB_DEVICE_MAX_INSTANCES macro 5-4023
usb_device_msd.h 5-4178
usb_device_msd_config_template.h 5-4178
USB_DEVICE_MSD_INIT structure 5-4176
USB_DEVICE_MSD_INQUIRY_RESPONSE structure 5-4177
USB_DEVICE_MSD_INTF macro 5-4175
USB_DEVICE_MSD_INTF_SUBCLASS macro 5-4175
USB_DEVICE_MSD_MAX_INSTANCES macro 5-4174
USB_DEVICE_MSD_MAX_LUN macro 5-4174
USB_DEVICE_MSD_MAX_SECTOR_SIZE macro 5-4174
USB_DEVICE_MSD_MEDIA_FUNCTIONS structure 5-4175
USB_DEVICE_MSD_MEDIA_INIT_DATA structure 5-4177
USB_DEVICE_MSD_PROTOCOL macro 5-4175
USB_DEVICE_Open function 5-4032
USB_DEVICE_POWER_STATE enumeration 5-4054
USB_DEVICE_PowerStateSet function 5-4039
USB_DEVICE_Reinitialize function 5-4028
USB_DEVICE_REMOTE_WAKEUP_STATUS enumeration
5-4055
USB_DEVICE_RemoteWakeupIsEnabled function 5-4039
USB_DEVICE_ResumeStart function 5-4036
USB_DEVICE_ResumeStop function 5-4037
USB_DEVICE_STATE enumeration 5-4055
USB_DEVICE_Status function 5-4035
USB_DEVICE_STRING_DESCS_PTR type 5-4056
USB_DEVICE_Tasks function 5-4031
USB_EP_TXRX enumeration 5-3279
usb_host.h 5-4198
USB_HOST_0 macro 5-4197
USB_HOST_1 macro 5-4197
usb_host_cdc.h 5-4223
USB_HOST_CDC_BreakSend function 5-4201
USB_HOST_CDC_CONTROL_LINE_STATE type 5-4223
USB_HOST_CDC_ControlLineStateSet function 5-4202
USB_HOST_CDC_EVENT enumeration 5-4210
USB_HOST_CDC_EVENT_DATA_GET_LINE_CODING_COM
PLETE
structure 5-4216
USB_HOST_CDC_EVENT_DATA_READ_COMPLETE
structure 5-4216
USB_HOST_CDC_EVENT_DATA_SEND_BREAK_COMPLETE
structure 5-4217
USB_HOST_CDC_EVENT_DATA_SERIAL_STATE_NOTIFICA
TION_RECEIVED
structure 5-4218
USB_HOST_CDC_EVENT_DATA_SET_CONTROL_LINE_STA
TE_COMPLETE
structure 5-4218
USB_HOST_CDC_EVENT_DATA_SET_LINE_CODING_COMP
LETE
structure 5-4219
USB_HOST_CDC_EVENT_DATA_WRITE_COMPLETE
structure 5-4220
USB_HOST_CDC_EVENT_HANDLER type 5-4220
USB_HOST_CDC_EVENT_RESPONSE type 5-4221
USB_HOST_CDC_EVENT_RESPONSE_NONE macro 5-4222
9 MPLAB Harmony Help
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USB_HOST_CDC_EventHandlerSet function 5-4203
USB_HOST_CDC_INDEX type 5-4221
USB_HOST_CDC_LineCodingGet function 5-4204
USB_HOST_CDC_LineCodingSet function 5-4205
USB_HOST_CDC_Read function 5-4206
USB_HOST_CDC_RESULT enumeration 5-4215
USB_HOST_CDC_SERIAL_STATE_NOTIFICATION_DATA
type 5-4221
USB_HOST_CDC_SerialStateNotificationGet function 5-4207
USB_HOST_CDC_TRANSFER_HANDLE type 5-4215
USB_HOST_CDC_TRANSFER_HANDLE_INVALID macro
5-4222
USB_HOST_CDC_TRANSFER_STATUS enumeration 5-4222
USB_HOST_CDC_Write function 5-4208
USB_HOST_Close function 5-4181
USB_HOST_Deinitialize function 5-4183
USB_HOST_DeviceInformationGet function 5-4184
USB_HOST_DeviceIsResumed function 5-4184
USB_HOST_DeviceIsSuspended function 5-4185
USB_HOST_DeviceResume function 5-4186
USB_HOST_DeviceSuspend function 5-4187
USB_HOST_ENDPOINT_TABLE_SIZE macro 5-4197
USB_HOST_EVENT_CALLBACK type 5-4195
USB_HOST_EVENT_DATA_VBUS_REQUEST_POWER
structure 5-4195
USB_HOST_EVENT_RESPONSE type 5-4195
USB_HOST_EVENT_RESPONSE_NONE macro 5-4197
USB_HOST_EventCallBackSet function 5-4187
USB_HOST_EVENTS enumeration 5-4196
USB_HOST_HANDLE type 5-4193
USB_HOST_HANDLE_INVALID macro 5-4194
USB_HOST_INIT structure 5-4193
USB_HOST_Initialize function 5-4188
USB_HOST_Open function 5-4182
USB_HOST_OperationDisable function 5-4190
USB_HOST_OperationEnable function 5-4190
USB_HOST_OperationIsEnabled function 5-4191
USB_HOST_Status function 5-4191
USB_HOST_Tasks function 5-4192
USB_HOST_TPL_FLAGS enumeration 5-4196
USB_MASTER_DESCRIPTOR structure 5-4056
USB_MAX_EP_NUMBER macro 5-3283
USB_OPMODES enumeration 5-3280
USB_OTG_INTERRUPTS enumeration 5-3280
USB_OTG_PULL_UP_PULL_DOWN enumeration 5-3281
USB_PID enumeration 5-3281
USB_PING_PONG_MODE enumeration 5-3282
USB_PING_PONG_STATE enumeration 5-3282
USB_TOKEN_SPEED enumeration 5-3283
USE_ANALOGCLOCK macro 5-321
USE_BITMAP_FLASH macro 5-321
USE_BUTTON macro 5-321
USE_CHART macro 5-321
USE_CHECKBOX macro 5-322
USE_COMP_RLE macro 5-322
USE_CUSTOM macro 5-322
USE_DIGITALMETER macro 5-322
USE_EDITBOX macro 5-323
USE_FONT_FLASH macro 5-323
USE_GOL macro 5-323
USE_GRADIENT macro 5-323
USE_GROUPBOX macro 5-323
USE_HORZ_ASCENDING_ORDER macro 5-1055
USE_LCC_SCROLLING macro 5-306
USE_LISTBOX macro 5-323
USE_METER macro 5-323
USE_MULTIBYTECHAR macro 5-324
USE_PICTURE macro 5-324
USE_PIE_ENABLE_LABEL macro 5-1055
USE_PIP macro 5-306
USE_PROGRESSBAR macro 5-324
USE_RADIOBUTTON macro 5-324
USE_ROUNDDIAL macro 5-324
USE_SLIDER macro 5-324
USE_STATICTEXT macro 5-324
USE_TEXTENTRY macro 5-325
USE_TOUCHSCREEN macro 5-325
USE_WINDOW macro 5-325
USER_SECURITY_NAME_LEN macro 5-3831
9 MPLAB Harmony Help
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Using Primitive Rendering Functions 5-1112
Using Status Functions 5-3351
Using the Build Projects 4-179
Using the Configurator 2-42
Using the File System 5-3381
Using the Library 5-194, 5-228, 5-255, 5-290, 5-300, 5-310,
5-320, 5-334, 5-344, 5-368, 5-398, 5-419, 5-458, 5-513, 5-553,
5-607, 5-695, 5-1111, 5-1129, 5-1168, 5-1276, 5-1313, 5-1362,
5-1472, 5-1521, 5-1564, 5-1669, 5-1734, 5-1866, 5-1905,
5-2087, 5-2172, 5-2203, 5-2253, 5-2289, 5-2331, 5-2428,
5-2479, 5-2595, 5-2663, 5-2689, 5-2705, 5-2763, 5-2799,
5-2893, 5-3012, 5-3086, 5-3171, 5-3321, 5-3349, 5-3364,
5-3420, 5-3439, 5-3466, 5-3501, 5-3530, 5-3570, 5-3575,
5-3599, 5-3615, 5-3626, 5-3637, 5-3647, 5-3655, 5-3660,
5-3691, 5-3698, 5-3710, 5-3719, 5-3748, 5-3771, 5-3795,
5-3799, 5-3807, 5-3810, 5-3823, 5-3859, 5-3868, 5-3881,
5-3914, 5-3918, 5-3931, 5-3955, 5-3979, 5-4005, 5-4064,
5-4104, 5-4133, 5-4169, 7-4231, 7-4233, 7-4235, 7-4237
Utilities 5-3542
V
v0.51.01b 5-601
v0.51.02b 5-3965
v0.51.03b 1-32
v0.51b 5-604, 5-3964
VENDOR_SPECIFIC_TRAP_NOTIFICATION_TYPE
enumeration 5-3852
Version Numbers 1-29
W
Wait States Initialization 5-2482
Watchdog Timer (WDT) System Service Library 5-3529
Watchdog Timer Peripheral Library 5-3319
WDT_MODULE_ID enumeration 5-3327
WDT_PLIB_ID macro 5-3532
web_server 3-131
web_server_nvm_mpfs 3-134
web_server_sdcard_fatfs 3-133
WF_WPS_PIN_LENGTH macro 5-674
What is MPLAB Harmony? 1-4
WHEAT macro 5-1055
WHITE macro 5-1055
Widget Objects 5-697
Writing a File 5-3394
X
XIP Mode 5-2896
Y
YELLOW macro 5-1056
Z
ZCLL_MODULE_CONFIG structure 5-3961
zero_conf_link_local.h 5-3962
zero_conf_multicast_dns.h 5-3962
Zeroconf Enabled Environments 5-3957
Zeroconf TCP/IP Stack Library 5-3954
9 MPLAB Harmony Help
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MPLAB Harmony Graphics
Composer User's Guide
MPLAB Harmony Integrated Software Framework
© 2013-2017 Microchip Technology Inc. All rights reserved.
MPLAB Harmony Graphics Composer User's Guide
This section provides user information about using the MPLAB Harmony Graphics Composer (MHGC).
MPLAB Harmony Graphics Composer User's
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 2
Introduction
This user's guide provides information on the MPLAB Harmony Graphics Composer (MHGC), also referred to as the graphics composer, which is
included in your installation of MPLAB Harmony. MHGC is tightly coupled with the Aria User Interface Library to facilitate rapid prototyping and
optimization of the application's graphical user interface (GUI).
Description
The MPLAB Harmony Graphics Composer (MHGC), also referred to as the graphics composer, is a graphics user interface design tool that is
integrated as part of the MPLAB Harmony Configurator (MHC). MHGC is tightly coupled with the Aria User Interface Library to facilitate rapid
prototyping and optimization of the application's graphical user interface (GUI). The tool provides a "What you see is what you get" (WSYWIG)
environment for users to design the graphics user interface for their application. Refer to Volume V: MPLAB Harmony Framework Reference >
Graphics Library Help > Aria User Interface Library for more information.
The MPLAB Harmony Graphics Composer (MHGC) Tool Suite and the Aria User Interface Library provide the following benefits to developers:
• Enhanced User Experience – Libraries and tools are easy to learn and use.
• Intuitive MHGC Window Tool – Flexible window docking/undocking. Undo/Redo and Copy/Paste support. Tree-based design model. Display
design canvas control including zooming.
• Tight Integration Experience – Graphics design & code generator tools are tightly integrated, providing rapid prototyping and optimization of
look and feel
• Powerful User Interface (UI) Library – Provides graphics objects and touch support
• Multi-Layer UI design – Supported in the MHGC tool and Aria Library
• Complete Code Generation – Can generate code for library initialization, library management, touch integration, color schemes and event
handling with a single click
• Supports Performance and Resource Optimization – Draw order, background caching, and advanced color mode support improve performance
• Resource optimization – Measures Flash memory usage and can direct resources to external memory if needed. Global 8-bit color look-up
table (LUT) supports reduced memory footprint. Heap Estimator tool, which helps to manage the SRAM memory footprint.
• Text localization – Easily integrate international language characters into a design and seamlessly change between defined languages at
run-time
• Easy to Use Asset Management – Tools provide intuitive management of all graphics assets (fonts, images, text strings)
• Image Optimization – Supports cropping, resizing, and color mode tuning of images
• Expanded Color Mode Support – The graphics stack can manage frame buffers using 8-bit to 32-bit color
• Powerful Asset Converter – Inputs several image formats, auto converts from input format to several popular internal asset formats, performs
auto palette generation for image compression, supports run-length encoding. Supports automatic font character inclusion & rasterization.
• Event Management – Wizard-based event configuration. Tight coupling to enable touch user events and external logical events to change the
graphics state machine and graphics properties.
• Abstract Hardware Support – Graphics controllers and accelerators can be added or removed without any change to the application
Glossary of Terms
Throughout this user's guide the following terms are used:
Acronym or Term Description
Action A specific task to perform when an event occurs.
Asset An image, font, or binary data blob that is used by a user interface.
Event A notification that a specific occurrence has taken place.
Resolution The size of the target device screen in pixels.
Screen A discreet presentation of organized objects.
Tool An interface used to create objects.
UI Abbreviation for User Interface.
Widget A graphical object that resides on the user interface screen.
MPLAB Harmony Graphics Composer User's Introduction
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 3
Graphics Composer Window User Interface
This section describes the layout of the different windows and tool panels available through MHGC.
Description
MHGC is launched from the MHC toolbar Launch Utility menu. Launching the Graphics Composer creates a new screen. Shown below is the
MHGC screen for the Aria Showcase demonstration. (If you don’t see this screen layout, reset the screen by selecting Window > Reset Dock
Areas from the window’s menus.)
Panels
By default, there are five active panels and one minimize panel on this screen:
• Screen Designer – Shows the screen design for the selected screen. Tabs on the bottom of the Screen Designer panel show the available
screens.
• Tree View – Shows the layer and widget hierarchy for the current screen.
• Screens – Manages screens in the application.
• Schemes – Manages coloring schemes in the application.
Note:
In v2.03b of MPLAB Harmony, a third tab named Options, along with Screens and Schemes was available. These properties are
now located within the File > Settings menu.
• Widget Tool Box – Available graphics widgets are shown on this panel. Widgets are added to the screen by selecting an icon and dragging or
clicking. Widget properties are discussed in the Widget Properties section below.
• Properties Editor – All properties for the currently selected object are shown in this panel.
• The MHGC Output console is parked at the bottom of the Screen Designer window. This console panel can be used to debug problems when
the Graphics Composer boots up or during its operation.
Each of the panels has a window tool icon at the upper right corner. Minimizing a panel parks it on the screen just like the Output Console.
Undocking the panel creates a new, free floating window. Redocking returns a previously undocked window to its original location on the Screen
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 4
Designer window.
When a panel is undocked, its edges become active and support moving or manipulating the panel as an independent window.
Tool Bar
There are 18 tool bar icons on the Screen Designer Window, as described in the following figure.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 5
Create New Design brings up a New Project Wizard dialog that allows you to select anew the screen size, color mode, memory size, and project
type. This will erase the currently displayed design.
Save Design saves the current graphics design.
Note:
The target configuration's configuration.xml will not be updated to reflect these changes in the graphics design until one of
the following events happens:
1. The application is regenerated in MHC,
2. The target configurations are changed in the MPLAB X IDE,
3. MPLAB X IDE is exited.
In items 2 and 3 you will be prompted to save the new configuration.
Undo and Redo manipulate changes in the screen design into internal MHC memory.
Cut/Copy/Paste support the manipulation of graphics objects (widgets).
Canvas Size Dialog brings up a dialog window allowing changes in the pixel width and height of the Screen Designer panel. (Note: Dimensions
smaller than the display’s dimensions are ignored).
Center View centers the panel’s view of the screen.
Zoom In and Zoom Out allow you to change the scale of the Screen Designer’s display of the current window. Currently this only supports coarse
zooming (powers of two zooms in and out).
Toggle Line Snapping enables/disables line snapping when moving objects (widgets).
Show Grid turns the Screen Designer pixel grid on/off.
X and Y Grid Size adjust the pixel grid.
Grid Color selects the pixel grid color.
Toggle Object Clipping turns object clipping on/off.
Toggle Screen Info turns the display of screen information (X and Y axes) on/off.
Select Text Preview Language changes the language used on all text strings shown, when the application supports more than one language.
Screen Designer Window
Most of the work of the MPLAB Harmony Graphics Composer is done using the Screen Designer. This section covers the basics of how a
graphical user interface is designed using the screen designer.
Description
The following figure shows the Screen Designer window for the Aria Quickstart demonstration, with the pic32mz_ef_sk_meb2 configuration
selected. (Load whatever configuration belongs to your board and follow along.)
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Screen Designer Window
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 6
The pixel dimensions of the display (480x272) are determined by the MHC Display Manager. Other configuration in Aria Quickstart can have
different size displays (such as: 220x176, 320x24, or 800x480).
This demonstration has three widgets: a label containing the title string at the top, an image of the MPLAB Harmony logo in the middle, and a
button containing the text string “Make changes. Generate. Run.” at the bottom. The label widget’s text string was first created using the String
Assets window before it was assigned to the label widget. The image assigned to the image widget was first imported using the Image Assets. The
string embedded in the button widget was also created using the String Assets window before it was assigned to the button widget.
The Tree View panel organizes the display’s widgets into groups using layers. Every display has at least one layer and complex designs can have
many more. Within the tree view, the order of layers and the order of widgets within a layer determine the draw order. Draw order goes from top to
bottom. Top-most layers and widgets are drawn first and bottom-most are drawn last. Controlling draw order is one of the ways to improve
graphics performance by minimizing redrawing.
Since the location of every widget within a layer is relative to the layer, you can move a layer’s worth of widgets by simply moving the layer. Layers
also provide inheritance of certain properties from the layer to all the layer’s widgets.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Screen Designer Window
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 7
Exploring the Screen Designer Window
We can add another widget to this screen by launching the Widget Tool Box panel into a separate window.
Next, drag a circle from the tool box onto the display. Find a place on the display for this new widget.
Besides dragging widgets onto the display, you can click on a widget in the Widget Tool Box, converting the cursor into that widget, and then click
on the screen to drop the widget in place.
Your display should now look appear like the following figure.
Note how the Tree View panel now shows the widget you just added.
Launch the Properties Editor for the circle.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Screen Designer Window
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 8
Next, change the fill property on the circle from “None” to “Fill”.
Note:
If the properties in the Properties Editor shown are not for CircleWidget1, click on the circle widget to change the focus of the
Properties Window.
When done, the screen should now appear, as follows.
Turn on Line Snapping, which enables drawing guides to assist in aligning widgets on the display.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Screen Designer Window
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 9
Next, turn on Object Clipping, which allows you to see how widgets are clipped by the boundaries of the layer that contains them.
Note: Clipping applies to layers, which can be smaller than the display.
To delete a widget, select the widget and press Delete on your keyboard or use the delete icon ( ) on the Tree View panel.
For more hands-on exploration of graphics using the Aria Quickstart demonstration, see Volume 1: Getting Started With MPLAB Harmony > Quick
Start Guides > Graphics and Touch Quick Start Guides > Adding an Event to the Aria Quickstart Demonstration.
The steps to create a new MPLAB Harmony project with touch input on a PIC32MZ EF Starter Kit with the Multimedia Expansion Board (MEB) II
display can be found in Volume 1: Getting Started With MPLAB Harmony > Quick Start Guides > Graphics and Touch Quick Start Guides >
Creating New Graphics Applications.
Menus
This section provides information on the menus for the MPLAB Harmony Graphics Composer screen.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Menus
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 10
Description
File Menu
New – Same as the Create New Design tool icon.
Save – Same as the Save Design tool icon.
Save As – Supports exporting the design under a new name. By default, the name is composer_export.xml. See Importing and Exporting
Graphics Data for more information.
Import - Reads in (imports) a previously exported design or a ./framework/src/system_config/{board_config}/configuration.xml
file that contains the graphics design to be imported. See Importing and Exporting Graphics Data for more information.
Export – Same as Save As. See Importing and Exporting Graphics Data for more information.
Settings – Brings up Project and User Settings dialog, including:
• Project Color Mode - How colors are managed
• Using a Global Palette
• Show Welcome Dialog
• Pre-emption Level – Allows for sharing of the device’s cycles with other parts of the application
• Hardware Acceleration – Is graphics hardware accelerator enabled in software?
Exit – Closes the MHGC window and exits
The choices for Project and User Settings > Project Color Mode are:
• GS_8 - 8-bit gray scale
• RGB_332 - Red/Green/Blue, 3 bits Red/Green, 2 bits Blue
• RGB_565 - Red/Green/Blue, 5 bits Red, 6 bits Green, 5 bits Blue
• RGBA_5551 - Red/Green/Blue/Alpha, 5 bits Red/ Green/Blue, 1 bit for Alpha Blending
• RGB_888 - Red/Green/Blue, 8 bits Red/Green/Blue
• RGBA_8888 - Red/Green/Blue/Alpha, 8 bits Red/Green/Blue/Alpha Blending
• ARGB_8888 - Alpha/Red/Green/Blue, 8 bits Alpha Blending/Red/Green/Blue
Ensure that the Project Color Mode chosen is compatible with the display hardware you are using; otherwise, the colors shown on the display will
not match those shown on the Graphics Composer Screen Designer.
Using a Global Palette enables frame buffer compression for applications using the Low-Cost Controllerless (LCC) Graphics Controller or Graphics
LCD (GLCD) Controller. If the global palette is enabled, you will have to change the MHC configuration of the Graphics Controller to match. For the
LCC controller, enable "Palette Mode". For the GLCD controller, change the Driver Settings > Frame Buffer Color Mode to "LUT8".
If Using a Global Palette is enabled, the following warning appears.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Menus
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 11
If Show Welcome Dialog is enabled, the following welcome screen appears when launching MHGC.
Note:
If you are not creating a new project you can ignore this window.
When the Preemption Level is set to zero, all dirty graphics objects are refreshed before the graphics process relinquishes control of the device.
(Dirty means needing a redraw.) With the level set to two, graphics provides maximum sharing with the rest of the application, at the cost of slower
display refreshes. A level of one provides an intermediate level of sharing.
The Hardware Acceleration check box determines whether graphics uses the device’s built-in graphics hardware accelerator in software.
Note:
You must also specify the graphics hardware accelerator in the MPLAB Harmony Framework Configuration within the MHC
Options tab. If the host device lacks a graphics processor, you will see a warning message when you try to select a processor that
does not exist on your device.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Menus
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 12
Edit Menu
This menu implements the same functions as the first seven tool icons.
View Menu
This implements the same functions as the remaining tool icons.
Asset Menu
These menu features are discussed in Graphics Composer Asset Management.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Menus
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 13
Tools Menu
The Event Manager, Global Palette, and Heap Estimator are discussed in MHGC Tools.
Window Menu
Selecting Console opens the Output Console for the Graphics Composer. This console panel can be used to debug problems when the Graphics
Composer boots up or during its operation.
Selecting Reset Dock Areas restores the MHGC panel configuration to the default setup by redocking all of the panels that have been undocked
into separate windows.
New Project Wizard
The New Project Wizard is launched from the Welcome dialog of the MPLAB Harmony Graphics Composer (MHGC), which supports the creation
of a new graphics design, or the importing of an existing graphics design.
Description
Welcome Dialog window
The Welcome dialog is launched when the Graphics Composer is chosen from the Launch Utility pull-down menu in the MPLAB Harmony
Configurator (MHC).
The window has three options:
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface New Project Wizard
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 14
Note:
If this window does not appear, it can be re-enabled from MHGC’s File > Settings > General menu.
New Project Wizard Windows
Selecting the first icon in the Welcome dialog launches the New Project Wizard. There are four stages in the New Project Wizard: Color Mode,
Memory Size, Project Type, and Finish.
The New Project Wizard can also be launched from the first icon (Create New Design) of MHGC’s tool bar:
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface New Project Wizard
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 15
If the Graphics Stack has not been enabled in MHC, an Enable Graphics Stack? dialog will appear to support enabling the Graphics Stack before
proceeding:
In the Color Mode stage you choose the Display Color Mode for the new graphics design:
This choice must be supported by the graphics controller defined in the board support package of the project configuration. (If you make a mistake
it can be corrected using MHGC’s File > Settings > Project Color Mode menu.) Click Next moves the wizard on to the next stage.
The Memory Size stage configures the Program Flash allocated to memory use. This value is only used by the Graphics Composer’s Asset menu
Memory Configuration tool. The value used in the Memory Size stage can be updated using the Configuration sub-tab of the Memory
Configuration tool window.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface New Project Wizard
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 16
Clicking Previous returns to the Color Mode stage and clicking Next moves the wizard to the Project Type stage.
There are two choices at the Project Type stage: A completely blank design, and a template design with a few predefined widgets.
Clicking Previous returns to the Memory Size stage, and clicking Next moves the wizard to the Finish stage.
If the “Template” project type was chosen, MHGC’s Screen Designer will show:
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface New Project Wizard
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 17
Tree View Panel
The organization of application widgets and layers, including draw order, is managed using this panel.
Description
Example Tree View
The following Tree View (from main screen of the Aria Coffee Maker demonstration shows the tree structure for a screen with three layers.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Tree View Panel
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 18
The tool icons for this panel support layers and managing screen objects (layers/widgets).
Drawing Order and Parent/Child Relationships
The Graphics Composer Tree View panel allows you to organize the widgets per screen in the desired drawing order (z-order). It also allows for
the user to organize the widgets into parent – child hierarchies to allow for the paint algorithm to draw the groups together in event of motion or
re-draw. Please note that this does not associate or group the widgets by functionality. (Example: a group of radio buttons might not belong to a
common parent on the screen.) This parent-child relationship is limited to the widgets location on the screen, motion on the screen and the
drawing order on the screen. (Exceptions to this general rule are the Editor > Hidden, Alpha Blending properties, and layer single versus double
buffering. These apply to the parent and all the parent's children.)
The tree is traversed depth-first. This means that the z-order goes background (bottom of z-order) to foreground (top of z-order) as we go from top
to bottom in the list of widgets, i.e., ImageWidget1, is the widget at the bottom of the z-order and the PanelWidget1 is the topmost widget on the
z-order. The tree structure can be arranged and modified by dragging the widgets and releasing it under the desired parent/child. Also, the list can
be modified by using the up/down arrows provided at the header of the Composer Widget tree window to traverse the tree.
Editor > Hidden Property for Layers
Setting Editor > Hidden hides the layer and all its children from the Graphics Composer Screen Designer but does not affect how the layer and its
children are displayed when the application is running. This can be useful when designing complex screens with overlapping layers.
Alpha Blending Property for Layers
Enabling Alpha Blending allows you to control the transparency of a layer and all its children. You can experiment with Alpha Blending in the Aria
Coffee Maker demonstration. Load the project, launch MHC, and then start the Graphics Composer Screen Designer. There are three layers
(Layer0, Layer1, Layer2) in this demonstration. Layer1 (the drag panel on the right) and Layer2 (the drag panel on the left) have Alpha Blending
enabled with Alpha Amount = 225. Setting the Alpha Amount to 255 is the same as disabling Alpha Blending (255 = no transparency). Setting the
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Tree View Panel
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 19
Alpha Amount to 0 makes the layer invisible (0 = full transparency, i.e., invisible).
The following figure shows the main screen with Alpha Blending = 225.
The following figure shows the main screen with Layer 2’s Alpha Blending = 255.
Double Buffering for Layers
Graphics double buffering for the LCC driver is enabled in the Display Manager’s Display Setting screen when the application is changed to use
external memory instead of internal. Click Configure to bring up the LCC Driver Configuration Settings Window.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Tree View Panel
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 20
Configure the memory according to whether double buffering is to be enabled for the display’s layer or layers.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Tree View Panel
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 21
Increasing the Buffer Count of a layer from 1 to 2 enables double buffering for the layer and all its child widgets. To prevent tearing on the display
when switching from one buffer to the other, VSync Enabled should also be selected.
Screens Panel
Application screens are managed using the Screens Panel.
Description
The Screens panel tab manages all the application’s screens, as shown in the following figure.
MPLAB Harmony Graphics Composer User's Graphics Composer Window User Interface Screens Panel
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.05 22
Note:
These screens are examples from the Aria Showcase demonstration project
The underlined screen name identifies the primary screen (in this case, SplashScreen.) The bold screen name identifies the currently active
screen in the Graphics Composer Screen Designer window (in this case MainMenu.) The blue background identifies the selected screen (i.e., the
screen that is manipulated by the tool icons), in this case FirstScreen.
Window Toolbar
The window’s tools icons support:
1. Create New Screen – Create a new screen. You will be prompted for the name of the new screen, which will appear at the bottom of the
Screens list.
2. Delete Screen – Delete the selected screen. This removes the selected screen from the application.
3. Set as Primary Screen – Sets the selected screen as the default screen displayed by the application at boot-up.
4. Make Screen Active – This selected screen is displayed in the Screen Designer panel. You can also select the active screen by clicking on the
screen’s tab at the bottom of the Screen Designer panel.
5. Move Screen Up in Order – Moves the selected screen up in the list of screens, which is useful in organizing a large list of screens, but has no
other significance.
6. Move Screen Down in Order – Moves the selected screen down in the list of screens.
Useful in organizing a large list of screens, but has no other significance.
Window Columns
The Generate check box is used in selecting those screens that will be included in the application when MPLAB Harmony Configurator (MHC)
generates/regenerates the application. (This, along with the Enabled check box for languages, allows customization of the application’s build to
support different end uses from the same project.) The Visible check box can be cleared to hide a screen from the sub-tabs located at the bottom
of the Screen Designer. The View column provides a mouse-over preview of the screen.
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Schemes Panel
Application color schemes are managed using the Schemes Panel.
Description
Color schemes for the application’s graphics are managed using the Schemes sub-tab.
Editing a Scheme
To edit an existing scheme, select the scheme from the list and click Edit.
The Scheme Editor dialog appears, which allows you to change the colors associated with this display scheme.
Scheme Editor
The Scheme Editor window supports editing the individual colors of a color scheme. Clicking the ellipsis ( … ) opens the Color Picker window.
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Color Picker
The Color Picker window allows the user to easily select a color by providing a color wheel, brightness gauge, and some common predefined color
choices. The user can change the individual color values or input a number in Hexadecimal format. The end result is displayed in the top right
corner.
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Options
Provides information on the defeatured Options window.
Description
In v2.03b, MPLAB Harmony Graphics Composer user interface provided a third window along with Screens and Schemes, named Options.
Beginning with v2.04b of MPLAB Harmony, these options are now located within the File > Settings menu (see Menus for details).
Widget Tool Box Panel
The Widget Tool Box panel is the interface by which users add widgets into the screen representation.
Description
All the available graphics widgets are shown in the Widget Tool Box:
MPLAB Harmony Graphics Composer provides automatic code optimization by keeping track of the widgets that are currently being used. When
MHC generates or regenerates the application, only the Graphics Library code necessary for your design is included in the project.
There are two primary methods for creating new widget objects: clicking and dragging. To add a new layer to a screen use the Screens sub-tab.
Click Method
The following actions can be performed by using the Click method:
• Clicking an item selects it as active. Users can then move the cursor into the screen window and view a representation of the object about to be
added.
• Left-clicking confirms the placement of the new object
• Right-clicking aborts object creation
• Clicking the active item again deactivates it
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Drag Method
Dragging and dropping a tool item into the Screen Designer Window creates a new instance of an object. When dragging a tool item, releasing the
cursor outside of the Screen Designer Window cancels the drag operation.
Widget List
The Graphics Composer Tool Box is the interface by which users add widgets into the screen representation.
Click Method
The following actions can be performed by using the Click method:
• Clicking an item selects it as active. Users can then move the cursor into the screen window and view a representation of the object about to be
added.
• Left-clicking confirms the placement of the new object
• Right-clicking aborts object creation
• Clicking the active item again deactivates it.
Drag Method
Dragging and dropping a tool item into the Screen Designer Window creates a new instance of an object. When dragging a tool item, releasing the
cursor outside of the Screen Designer Window cancels the drag operation.
Automatic Code Optimization
MPLAB Harmony Graphics Composer keeps track of the types of widgets that are used and updates the MHC Tree constantly to ensure that only
the Graphics Library code necessary for your design is included in the project.
Widgets
Widgets can be configured by using the Properties Editor on the right side of the MHGC interface. Each widget has multiple properties to manage
their appearance as well as their functioning. Most properties related to appearance are common between widgets, though some widgets require
specific property entries.
Button - A binary On and Off control with events generation for Press and Release state.
Check Box - A selection box with Checked and Unchecked states, and associated events.
Circle - A graphical object in the shape of a circle.
Draw Surface - A container with a callback from its paint loop. a draw surface lets the application have a chance to make draw calls directly to the
HAL during LibAria's paint loop.
Gradient - A draw window that can be associated with a gradient color scheme. This allows for color variation on the window.
Group Box - A container with a border and a text title. With respect to functionality, a group box is similar to a window.
Image Sequence - A special widget that allows image display on screen to be scheduled and sequenced. You can select the images to be
displayed, the order for display, and the durations.
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Image - Allows an image to be displayed on screen. The size and shape of the widget decides the visible part of the image, as scaling is not
enabled for images at this time.
Key Pad - A key entry widget that can can be designed for the number of entries divided as specified number of rows and column entries. The
widget has a key click event that can be customized.
Label - A text display widget. This does not have any input at runtime capability. A Text Field widget serves that purpose.
Line - A graphical object in the shape of a line.
List Wheel - Allows multiple radial selections that were usually touch-based selections and browsing.
List - Allows making lists of text and image items. The list contents, number of items, and the sequence can be managed through a List
Configuration dialog box in the Properties box.
Panel - A container widget that is a simpler alternative to DrawSurface as it does not have the DrawSurface callback feature.
Progress Bar - Displays the progress pointer for an event being monitored through the "Value Changed" event in the Properties Editor.
Radio Button - A set of button widgets that are selected out of the group one at a time. The group is specified by the Group property in the
Properties Editor.
Note:
The radio buttons in the same group must have the same group number specified in their properties.
Rectangle - A graphical object in the shape of a rectangle.
Scroll Bar - Intended to be used with another relevant widget such as the List Wheel to scroll up and down. It has a callback each time the value
is changed. The callback allows users to trigger actions to be handled on the scroll value change event.
Slider - Can change values with an external input such as touch. Event callbacks on value change are also available through the Properties Editor.
Text Field - Text input can be accepted into the text field from an external input or from a widget such as keypad. Event 'Text Changed' in the
Properties Editor is used for accepting the input.
Touch Test - Allows tracking of touch inputs. Each new touch input is added to the list of displayed touch coordinates. The input is accepted
through the 'Point Added' event callback in the Properties Editor.
Window - A container widget similar to the Panel but has the customizable title bar.
Properties Editor Panel
The properties for all layers and widgets are managed using this panel.
Description
The Properties Editor displays options for the currently-selected object (layer or widget), or the options for the active screen if no objects are
selected. To edit an option: left-click the value in the right column and then change the value. Some values have an ellipsis that will provide
additional options. In the previous case, the ellipsis button will display the Color Picker dialog.
Some properties, like the screen width and height, are locked and cannot be edited. Other properties offer check boxes and combo-type
drop-down box choices. Some properties are grouped together like the Position and Size entries. Individual values of the group can be edited by
expanding the group using the plus symbol. For example, the following figure shows properties for a Button Widget.
A new support feature is the ? icon to the right of the Scheme pull-down, which brings up an “Scheme Helper” for the widget showing how it is
colored when using a Bevel border. For a more complete description of widget coloring, see Widget Colors.
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Object Properties
Provides information on widget, layer, and screen properties.
Description
Object Properties and Event Actions
Each widget has a structured tree of properties, visible under the MPLAB Harmony Configurator window on the right of the standard window setup
within MPLAB X IDE. Most widget properties have a Related Event action that can be use in an event or macro to change or set a property from
the application.
Each widget has 3-4 property sets:
Editor – Controls the behavior of layers and widgets under the MPLAB Harmony Graphics Composer Suite Editor.
Property Name Type Description Related Event Actions
Locked Boolean Locks the object (widget), preventing changes by the designer.
Only affects the object (widget) in the editor.
N/A
Hidden Boolean Hides the widget and its children in the designer window. Only
affects the appearance of the widget in the editor.
N/A
Active Boolean For layers only. Sets the layer as active. Any objects (widgets)
added to the screen will be added to this layer.
N/A
Locked to Screen Size Boolean For layers only. Locks the layer size to the size of the display’s
screen.
N/A
Widget – Controls the behavior of screens, layers, and widgets on the display.
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Property Name Type Description Related Event Actions
Name String Editable name for each object. By default, widgets are named
NameWidget1, …,NameWidgetN. For example: ButtonWidget1,
ButtonWidget2, … .
N/A
Position [X,Y] Pair of
Integers
Location on the layer of the upper left corner of the widget or
the location on the display of the upper left corner of the layer.
Measured in display pixels. X is measured from left-to-right and
Y is measured from up-to-down from the upper left corner of the
parent object (typically a Layer or Panel).
Adjust Position, Set X
Position, Set Y Position
Size [X,Y] Pair of
Integers
X: Width, Y: Height of object, in display pixels. Adjust Size, Set Size, Set
Width, Set Height
Enabled Boolean Is the object enabled? Disabled objects are not built into the
display’s firmware.
Set Enabled
Visible Boolean Is the object visible by default? Object visibility can be
manipulated in firmware using laWidget_GetVisible and
laWidget_SetVisible.
Set Visible
Border Widget Border Choices are: { None | Line | Bevel }. Set Border Type
Margin Integer Four integers ([Left,Top,Right,Bottom]) defining the widget’s
margins on the display, in display pixels.
Set Margins
Scheme Color scheme assigned to the layer or widget. Blank implies the
default color scheme.
Set Scheme
Background Type Sets the background of the layer or widget. Choices are { None
| Fill | Cache }. In MPLAB Harmony v2.03, this type was
Boolean. Now, Off = None, On = Fill. With Fill selected, the
widget's background is one solid color. With Cache selected, a
copy (cache) of the framebuffer is created before the widget is
drawn and this cache is used to fill the background of the
widget. This supports transparent widgets in front of complex
widgets, such as JPEG images. Instead of rerendering the
JPEG image, it is just drawn from the cache.
Set Draw Background
Alpha Blending Boolean Is alpha blending enabled for this layer or widget and all of its
children? If enabled, specify the amount of alpha blending as an
8-bit integer. Zero makes the object invisible, whereas 255
makes the background invisible.
N/A
Widget Advanced – Advanced control of layers and widgets
Optimization
Sub-Property Name
Type Description Related Event Actions
Draw Once Boolean Indicates that the widget should draw once per screen Show
Event. All other attempts to invalidate or paint the widget will be
rejected.
N/A
Force Opaque Boolean Provides a hint to the renderer that the entire area for this
widget is opaque. Useful for widgets that may use something
like an opaque image to fill the entire widget rectangle despite
having fill mode set to None. This can help reduce unnecessary
drawing.
N/A
Local Redraw Boolean Provides a “hint” to the widget’s renderer that the widget is
responsible for removing old pixel data. This can avoid
unnecessary redrawing.
N/A
Important!
Use Local Redraw only if you know what you’re doing!
Widget Name (e.g., Button Check Box, Circle, etc.) – Optional properties tied to each widget. See Dedicated Widget Properties and Event
Actions.
Events – Associates widget events with event call-backs. For example, you can enable and specify a button pressed event and button release
event for the Button widget.
For each event you specify:
• Enabled/Disabled Check box – To enable or disable (default) the event.
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• Event Callback – Selected from the Event Editor Action List.
There are additional Event actions that do not correspond to any specific property:
• Set Parent – Set the parent of the object, including no parent.
Dedicated Widget Properties and Event Actions
Button
Property Name Type Description Related Event Actions
Toggleable Boolean Is button toggle enabled? Set Toggleable
Pressed Boolean If Toggleable is enabled, provide default state of the button.
This can be used to see the colors of an asserted button.
Set Press State
Text String Select widget’s text string from the Select String Dialog. Set Text
Alignment:
• Horizontal
• Vertical
Text string alignment within the button object.
Horizontal alignment. Choices are: { Left | Center | Right }.
Vertical alignment. Choices are: { Top | Middle | Bottom }.
Set Horizontal Alignment
Set Vertical Alignment
Pressed Image Select image used for pressed state. Default: no image. Set Pressed Image
Released Image Select image used for pressed state. Default: no image. Set Released Image
Image Position Position of image relative to button text. Choices are: { LeftOf |
Above | RightOf | Below | Bottom }.
Set Image Position
Pressed Offset Integer Offset of button contents when pressed. In Pixels.
The X and Y position of the button contents is offset by this
amount.
Set Pressed Offset
Check Box
Property Name Type Description Related Event Actions
Text String Select widget’s text string from the Select String Dialog. Set Text
Alignment:
• Horizontal
• Vertical
Text string alignment within the button object.
Horizontal alignment. Choices are: { Left | Center | Right }.
Vertical alignment. Choices are: { Top | Middle | Bottom }.
Set Horizontal Alignment
Set Vertical Alignment
Checked Boolean Default state of the check box. Set Check State
Unchecked Image Select image used for widget’s unchecked state. Default: no
image.
Set Unchecked Image
Checked Image Select image used for the widget’s checked state. Default: no
image.
Set Checked Image
Image Position Position of image relative to check box text. Choices are: : {
LeftOf | Above | RightOf | Below | Bottom }.
Set Image Position
Image Margin Integer Space between image and text. In Pixels. Set Image Margin
Circle
Property Name Type Description Related Event Actions
X Integer X offset of circle’s center, from widget’s upper left hand corner,
in pixels.
N/A
Y Integer Y offset of circle’s center, from widget’s upper left hand corner,
in pixels.
N/A
Radius Integer Circle’s radius, in pixels. Set Radius
Draw Surface – No additional properties.
Gradient
Property Name Type Description Related Event Actions
Direction Gradient draw direction. Choices are: { Right | Down | Left | Up }. Set Direction
Group Box
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Property Name Type Description Related Event Actions
Text String Select widget’s text string from the Select String Dialog. Set Text
Alignment Text string alignment within the widget. Choices are: {
Left|Center|Right }.
Set Alignment
Image Sequence
Property Name Type Description Related Event Actions
Sequence Configuration
Dialog
Specify image sequence by using the Image Sequence
Configuration Dialog window.
Set Entry Image, Set Entry
Horizontal Alignment, Set
Entry Vertical Alignment,
Set Entry Duration, Set
Image Count
Starting Image Integer Selects the first image to be shown. Set Active Image
Play By Default Boolean Will image sequence play automatically? N/A
Repeat Boolean Should the image sequence repeat? Set Repeat
Additional related event
actions: , Show Next, Start
Playing, Stop Playing.
Image Widget
Property Name Type Description Related Event Actions
Image Select image used. Set Image
Alignment:
• Horizontal
• Vertical
Image alignment within the image object.
Horizontal alignment. Choices are: { Left | Center | Right }.
Vertical alignment. Choices are: { Top | Middle | Bottom }.
Set Horizontal Alignment
Set Vertical Alignment
Key Pad
Property Name Type Description Related Event Actions
Row Count Integer Number of key pad rows. None.
Column Count Integer Number of key pad columns. None.
Key Pad Configuration
Dialog
(see Description) The Key Pad dialog window has the following:
• Width – Integer. Width of each key, in pixels.
• Height – Integer. Height of each key, in pixels.
• Rows – Integer. Number of key rows. A duplicate of Row
Count.
• Columns – Integer. Number of key columns. A duplicate of
Column Count.
None.
None.
None.
None.
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- - Selecting one of the keys on the key pad diagram displays the
Cell Properties for that key:
• Enabled – Boolean. Disabled cells (keys) are made
invisible.
• Text String – Select key’s text string from the Select String
Dialog.
• Pressed Image – Select image used for pressed state.
Default: no image.
• Released Image – Select image used for released state.
Default: no image.
• Image Position – Position of image relative to key text.
Choices are: { LeftOf | Above | RightOf | Below | Behind }.
• Image Margin – Integer. Space between image and text. In
Pixels.
• Draw Background – Boolean. Controls whether the key
should fill its background rectangle.
• Editor Action – Select the generic editor action that fires
when the key is clicked. Choices are: { None | Accept |
Append |
• Editor Value String
Other Key Event Actions:
Set Key Enabled
Set Key Text
Set Key Pressed Image
Set Key Released Image
Set Key Image position
Set Key Image Margin
None.
Set Key Action
Set Key Value
Set Key Background Type
Label
Property Name Type Description Related Event Actions
Text String Select widget’s text string from the Select String Dialog. Set Text
Alignment:
• Horizontal
• Vertical
Text string alignment within the widget.
Horizontal alignment. Choices are: { Left | Center | Right }.
Vertical alignment. Choices are: { Top | Middle | Bottom }.
Set Horizontal Alignment
Set Vertical Alignment
Line
Property Name Type Description Related Event Actions
Start X Integer X start of line, in pixels, from upper left hand corner of the
widget.
Set Start Point Position
Start Y Integer Y start of line, in pixels, from upper left hand corner of the
widget.
Set Start Point Position
End X Integer X end of line, in pixels, from upper left hand corner of the widget. Set End Point Position.
End Y Integer Y end of line, in pixels, from upper left hand corner of the widget. Set End Point Position.
List
Property Name Type Description Related Event Actions
Selection Mode Select list selection mode. Choices are:
{Single|Multiple|Contiguous}.
Set Selection Mode
Allow Empty Selection Boolean Is a list selection allowed to be empty? Set Allow Empty Selection
Alignment Horizontal text alignment. Choices are: { Left | Center | Right }. Set Item Alignment
Icon Position Position of list icons relative to list text. Choices are: { LeftOf |
RightOf }.
Set Icon Position
Icon Margin Space between icon and text, in pixels. Set Icon Margin
List Configuration Dialog Defines the string and icon image for each entry in the list. Set Item Icon, Set Item
Icon (actually sets item
text).
Additional Related Event
Actions: Deselect All
Items, Insert Item, Remove
All Items, Remove Item,
Select All Items, Set Item
Selected, Toggle Item
Select(ed).
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List Wheel
Property Name Type Description Related Event Actions
Alignment Sets horizontal text alignment. Choices are: { Left | Center |
Right }.
Set Item Alignment
Icon Position Position of icons relative to text. Choices are: { LeftOf | RightOf
}.
Set Icon Position
Icon Margin Integer Sets the space between icon and text. In pixels. Set Icon Margin
Selected Index Integer Selects the default list item. Set Selected Index
List Configuration Dialog Defines the image/text for each entry in the list. Set Item Icon, Set Item
Icon (actually sets item
text)
Additional Related Event
Actions: Append Item,
Insert Item, Remove All
Items, Remove Item,
Select Next Item, Select
Previous Item.
Panel – No additional properties.
Progress Bar
Property Name Type Description Related Event Actions
Direction Direction of progress bar. Choices are: { Right | Down | Left | Up
}.
Set Direction
Value Default value of the progress bar. The primitives
laProgressBarWidget_GetValue and
laProgressBarWidget_GetValue can be used to
manipulate the widget’s value during run time.
Set Value
Radio Button
Property Name Type Description Related Event Actions
Text String Select widget’s text string from the Select String Dialog. Set Text
Alignment:
• Horizontal
• Vertical
Text string alignment within the widget.
Horizontal alignment. Choices are: { Left | Center | Right }.
Vertical alignment. Choices are: { Top | Middle | Bottom }.
Set Horizontal Alignment
Set Vertical Alignment
Group Integer Radio Button Group Number. Default is -1, indicating no group.
Only one radio button in a group can have a default selected
value of On. All others in the group are Off
N/A
Selected Boolean If selected, the button has a default value of On. All other
buttons in the group have a Selected value of Off.
Select
Selected Image Select image used for selected state. Default: no image. Set Selected Image
Unselected Image Select image used for unselected state. Default: no image. Set Unselected Image
Image Position Position of image relative to widget text. Choices are: { LeftOf |
Above | RightOf | Below | Behind }.
Set Image Position
Image Margin Space between radio button image and text, in pixels. Set Image Margin
Rectangle
Property Name Type Description Related Event Actions
Thickness Integer Line thickness in pixels. Set Thickness
Scroll Bar
Property Name Type Description Related Event Actions
Orientation Scroll bar orientation. Choices are: { Vertical | Horizontal }. Set Orientation
Maximum Integer Maximum scroll value (minimum = 0.) Set Maximum Value
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Extent Integer Length of scroll bar slider, re scroll bar maximum value.
Indicates the number of lines or size of window visible at each
scroll setting.
Set Extent
Value Integer Initial scroll bar value. Set Value, Set Value
Percentage
Step Size Integer Step size value of scroll bar arrow buttons. ( Min = 1, Max =
9999 ).
Set Step Size
Additional Related Event
Actions: Step Backward,
Step Forward
Slider
Property Name Type Description Related Event Actions
Orientation Orientation of the slider. Choices are: { Vertical | Horizontal }. Set Orientation
Minimum Minimum slider value. Set Minimum Value
Maximum Maximum slider value. Set Maximum Value
Value Initial slider value. Set Value, Set Value
Percentage
Grip Size Grip size of slider, from 10 to 9999, in pixels. Set Grip Size
Additional Related Event
Actions: Step
Text Field
Property Name Type Description Related Event Actions
Text String Select widget’s text string from the Select String Dialog. Clear Text followed by
Append Text
Alignment Horizontal alignment. Choices are: { Left | Center | Right }. Set Alignment
Cursor Enable Boolean. Show blinking cursor while editing. Set Cursor Enabled
Cursor Delay Cursor delay in milliseconds. From 1 to 999,999. Set Cursor Delay
Additional Related Event
Actions: Accept Text,
Append Text, Backspace,
Clear Text, Start Editing.
Touch Test – No dedicated properties.
Window
Property Name Type Description Related Event Actions
Title String Select widget’s title string from the Select String Dialog. Set Title
Icon Image Select image used. Default: no image. Set Icon
Image Margin Integer Space between icon and title, in pixels. N/A
Layer Properties and Event Actions
The property list for a graphic layer is close in look and feel to that of a widget. Each Layer has three property sets: Editor (see above), Widget
(see above), and Layer (see below).
Layer Properties
Property Name Type Description Related Event Actions
Transparency Enabled Boolean Automatically mask out pixels of with a specified color.
If enabled Specify:
N/A
Mask Color Integer Red/Green/Blue or Red/Green/Blue/Alpha color value N/A
All Input Passthrough Boolean Allow input events to pass through this layer to layers behind it. N/A
VSync Enabled Boolean Layers should swap only during vertical syncs. N/A
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Buffer Count Integer Integer number of frame buffers associated with this layer,
either 1 or 2.
N/A
Buffer N For each buffer (N= 1 or 2) you specify:
Allocation Method Buffer allocation method.
Choices are: { Auto | Address | Variable Name }
• Auto – Automatically allocate frame buffer space
• Address – Specify a memory address
• Variable Name – Use variable name as buffer location
N/A
Memory Address If Address is the allocation method, specify the raw (physical)
memory address as a hexadecimal number.
N/A
Variable Name String If Variable name is the allocation method,
specify the variable name as a string value.
N/A
Screen Properties and Events
The property list for a screen shares the Name and Size properties with Layers and Widgets but has these unique properties.
Screen Properties
Property Name Type Description Related Event Actions
Orientation Display orientation: 0, 90, 180, 270 Degrees.
This can also be set using the Display Manager.
N/A
Mirrored Boolean Enables screen mirroring. N/A
Layer Swap Sync Boolean Enables that all layer buffer swapping happen at the same time,
delaying lower layers until higher layers are finished drawing as
well. For example, assume you make changes to layer 0 and
layer 1 and you want to see those changes show up on the
screen at the same time. Without this option you’d see layer 0’s
changes as soon as it finishes when layer 1 has not yet started
drawing. This option will hold layer 0’s swap operation until
layer 1 finishes as well.
Note: Currently, this property is only supported by the
CLCD Graphics Controller Driver and is ignored by all other
drivers.
N/A
Persistent Boolean Indicates that the screen should not free its widgets and
memory when it is hidden. This results in faster load times and
persistent data, but at the cost of higher memory consumption.
N/A
Export Boolean Includes this screen the application build.
This can also be set using the Screens panel.
N/A
Primary Boolean Sets this screen as the primary screen. The primary screen is
the first screen displayed when the application starts. This can
also be done using the Screens Panel Generate check box.
N/A
Graphics Composer Asset Management
The Asset menu supports managing all graphical assets (memory, images, languages, fonts, strings, and binary data).
Memory Configuration
Provides information on configuring memory locations.
Description
The Memory Locations window is launched from the Graphics Composer’s Asset menu. Selecting Memory Locations this brings up a window with
three sub-tabs (in this example, the Aria Showcase demonstration is referenced):
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Window Toolbar
The window’s tools icons support:
1. Add New Memory Location – This supports multiple external memory resources.
2. Delete Selected Memory Location – Removes a previously defined memory location.
3. Rename Selected Memory Location – Renames a previously defined memory location.
4. Configure External Media Application Callback – This allow definition of media callbacks, which must be provided in the project.
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5. Show Values as Percent – Memory utilization on the bar graph can be in bytes or as a percent of the total internal flash memory assigned to
support asset storage. (That memory allocation is set using the Configuration sub-tab.)
The APIs for the external media callback functions are as follows:
GFX_Result app_externalMediaOpen(GFXU_AssetHeader* asset);
GFX_Result app_externalMediaRead(GFXU_ExternalAssetReader* reader,
GFXU_AssetHeader* asset,
void* address,
uint32_t readSize,
uint8_t* destBuffer,
GFXU_MediaReadRequestCallback_FnPtr cb);
void app_externalMediaClose(GFXU_AssetHeader* asset);
The graphics demonstration project, aria_external_resources, provides an example of how to write these callbacks. This demonstration supports
three types of external memory: SQI External Memory, USB Binary, and USB with File System. Examples of these callbacks are found in the
project’s app.c file. The Aria demonstration projects Aria External Resources and Aria Flash provide more details on how to use external memory
to store graphics assets.
Sub-tabs
There are three sub-tabs to this window.
Summary Sub-tab
This sub-tab summarizes program flash allocations for images, strings, and fonts.
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The memory allocation shown for “Font Glyphs” measure the space that holds all the font glyphs used by the application, either by static strings or
by glyph ranges defined in support of dynamic strings. Strings are defined by arrays of pointers to glyphs, so string memory usage measures the
size of these arrays, not the actual font glyphs used. (“Glyph” is defined here.)
Note:
The word “glyph” comes from the Greek for “carving”, as seen in the word hieroglyph – Greek for “sacred writing”. In modern
usage, a glyph is an elemental or atomic symbol representing a readable character for purposes of communicating through writing.
Configuration Sub-tab
This sub-tab specifies the intended allocation of internal (program) flash memory to graphics assets (Total Size). (The default value is 1024 bytes.)
It also names the graphics assets file name (here it will be gfx_assets.c). The allocation of flash is only used to scale the Total/Used/Available
bar graph at the top of the display. Under sizing or oversizing this amount does not affect how the application is built.
If your device has 1024 Kbytes (1048576 bytes) of flash, you can assign 40% to asset storage and 60% to code. In that case the “Total Size” in the
above sub-tab would be set to 419430 (= 40% of 1048576).
The Calculator button can assist you in allocating internal flash. Click on it and then set the device flash capacity. Then you can apply an
adjustment to that value to assign that memory to asset storage.
Example:
If the device has 2 Mbytes of internal Flash, click 2MB.
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Then, to assign 75% of the 2 Mbytes to asset storage, click -25% to reduce the 2 MB by 25%, leaving 75%, and then click OK to finish. This will
then assign 1,536,000 bytes to asset storage.
Internal (program) Flash is shared between the application’s code and asset storage. If the application code and graphics assets (fonts, strings,
images) won’t fit into the available flash memory then the linker will be unable to build the application and an error will be generated in MPLAB X
IDE.
The Output File Name must be compatible with the operating system hosting MPLAB X IDE. In most cases the default name (gfx_asset.c) will
suffice, but this is provided for additional flexibility in building the application.
Optimization Sub-tab
The Optimization sub-tab for the Aria Quickstart demonstration is shown in the following figure.
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The Size column shows the bytes allocated for storage in internal flash for the images, fonts, and binaries of the application.
The References column shows the number of known references for these assets by the application’s widgets. A references count of zero
suggests that the asset is not used by the application, but it could also mean that the asset is only used in real-time when it is dynamically
assigned to a widget by the application. Clicking the title of a column (Name, Size, or References) sorts the lists of graphics assets by that column.
Clicking the same column again reverses the sort order.
The window’s tools icons support:
1. Edit Selected Asset – This brings up the edit dialog for the image, font, or binary chosen
2. Delete Selected Assets – Removes the selected assets
3. Move Selected Assets – Move assets from one location to another. This is useful for moving assets to/from internal memory from/to external
memory.
4. Show Only Images – Show image assets toggle on/off
5. Show Only Fonts – Show font assets toggle on/off
6. Show Only Binaries – Show binary assets toggle on/off
Image Assets
Provides information on the Image Assets features.
Description
The Image Assets window is launched from the Graphics Composer’s Asset menu.
The Image Assets window lets you import images, select different image formats/color modes for each image, select compression methods (for
example, RLE) for each image, and displays the memory footprint of each. Images can be imported as a BMP, GIF, JPEG, and PNG (but not
TIFF). Images can be stored as Raw (BMP, GIF), JPEG, and PNG.
Note:
MHGC does not support image motion that can be found in GIF (.gif) files. GIF images are stored in the raw image format,
meaning that there is no image header information stored with the image.
When an image is imported into MGHC, the Graphics Asset Converter (GAC) stores the input format and color mode along with any relevant
header data. The image’s pixel data is then promoted from its native format into a Java Image using 32 bits/pixel (8 bits for each color, RGB, and 8
bits for Alpha Blending). If the image contains Alpha Blending then this information is stored in the “A” of RGBA, otherwise the “A” is set to
maximum opacity. When the application is built each image is stored in the image format and color mode selected. Images displayed in the Screen
Designer are converted from Java Image format into the format/color mode selected so that the Screen Designer accurately represents what the
application will show when running.
The images are decoded on the fly by the graphics library and rendered on the screen. This provides the designer with considerable flexibility to
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import using one format and store resources using another format, thus exploring and maximizing the best memory utilization for their application
and hardware. This supports trading a smaller memory footprint at the cost of additional processing (for static or drawn-once) or reducing
processing at the cost of a larger memory footprint (dynamic or drawn many times).
The following figure shows the Image Assets window for the Aria Quickstart demonstration.
Window Toolbar
There are five icons on the toolbar below the Images tab:
1. Add Image Asset – Brings up “Import Image File” dialog window to select image file to add to the graphics application.
2. Replace Existing Image with New Image File – Brings up the same “Import Image File” dialog but instead of creating a new image, the file’s
content replaces the currently selected image.
3. Rename Selected Image – Renames the selected image.
4. Create New Virtual Folder – Creates a new virtual folder, allowing you to organize images in a hierarchy.
5. Delete Selected Images – removes the selected images from the application.
Selecting the Add Image Asset or Replace Existing Image icon opens the Import Image File dialog that can be used to select and import an image.
After selecting the file and clicking Open, the Image Assets window opens.
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The size of the memory used for this image based on its color mode, format, compression, and global palette usage is shown by Size (bytes). See
Image Format Options below for more details.
The File Name of the original source file is also shown, but may be blank if the image was imported under MPLAB Harmony v2.03b or earlier. The
format and color mode of the stored image can be changed to reduce the image’s memory footprint. (If using an LCC controller, you can also turn
on the Global Palette, replacing each pixel in the image with just an 8 bit LUT index.)
The three internal image formats are:
• Raw – binary bit map with no associated header information. GIF and BMP images are imported into this format.
• PNG – lossless image format with compression, 24 bits/pixel (RBG_888) or 32bits/pixel (RGBA_8888). A good choice for line drawings, text,
and icons.
• JPEG (JPG) – loss compressed format, uses much less storage than the equivalent bit map (raw). Good for photos and realistic images.
The Image Assets window supports resizing, cropping, or resetting an image:
• Resize – Brings up a dialog window to change the pixel dimensions of the image. The image is interpolated from the original pixel array into the
new pixel array.
• Crop – Places a cropping rectangle on the image. Click and drag a rectangle across the image to select the new image. Then click Ok to crop
the image.
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• Reset – Allows undoing of a resize or crop. The original image is always stored in the project, so a Reset is always available to return the
image to its original state.
Original images are retained by MHGC by the superset Java Image format. So an image crop will change how the image is stored in the
application but not how it is stored in MHGC. Reset will always restore the image back to the original pixels. (Reset is not an “undo”.)
Example Images
Example images are available from many sites on the internet. One of the best sites is found at the USC-SIPI Image Database
(http://sipi.usc.edu/database/). There are many canonical test images, such as Lena, The Mandrill (Baboon), and other favorites, all in the TIFF
format. The TIFF format is not supported by the Graphics Composer, but you can easily convert from TIFF to BMP, GIF, JPEG, or PNG using the
export feature found in the GNU Image Manipulation Program (GIMP), which is available for free download at: https://www.gimp.org. GIMP also
allows you to change the pixel size of these images, usually 512x512, to something that will fit on the MEB II display (either 256x256 or smaller).
The following figure shows the Graphics Composer Screen Designer for the pic32mz_da_sk_meb2 configuration of the Aria Quick Start project
after adding three images.
The following figure shows the Optimization Tab after adding these images.
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Selecting the Baboon_GIF image and the Edit Selected Asset icon ( ) opens an Image Assets window, as shown in the following figure.
Because this image had only 253 unique pixel colors (Unique Pixel Count = 253) the Enable Palette option was automatically enabled. This
feature, which works on an image by image basis, is separate from enabling a Global Palette. The image is stored using 8 bits of indexing into an
image-specific lookup table (LUT). If the image has more than 256 unique colors then the Enable Palette option is not available and is not shown.
Image Format Options
Raw Format Images
Raw format images have the following options:
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Regardless of the Color Mode of the imported the image, the stored image can be stored in a different color mode. For example, a JPEG image
could be in 24 bits/pixel RGB format but stored in the application using RGB_565 or even RBG_332 to save space. The Project Color Mode (set
through the File > Settings menu) is different from the Color Mode of images. This is determined by the capabilities of the projects graphics
controller. The graphics library converts images from the stored color mode to the project’s color mode before output.
If the image has 256 or less unique pixel colors an option to Enable Palette is set by default. If the image has more than 256 unique colors this
option is not displayed. This replaces the palette pixels with 8-bit indices into the image’s palette look up table (LUT). NOTE: Enabling the Global
Palette disables this for all images and all image pixels are replaced by 8-bit indices into the global palette LUT.
The Compression Mode for a raw format image is either None (no compression) or RLE for run-length encoding.
Image masking is a form of cheap blending. For example, given the following image, you may want to show the image without having to match the
lime green background. With image masking you can specify that the lime green color as the “mask color”, causing it to be ignored when drawing
this image. The rasterizer will simply match a pixel to be drawn with the mask. If they match, the pixel is not rendered.
PNG Format Images
For PNG format images you can change the image format and the image color mode:
JPEG Format Images
For JPEG format images you can change from JPEG format to Raw or PNG:
Once changed from JPEG into another format, the new format will have other options.
Managing Complex Designs
The Image assets tool lists the images in the order of their creation. In a future version of MPLAB Harmony this will be sortable by image name.
For now, it is recommended that you use the Memory Locations asset tool, and use the Optimization sub-tab instead to manage a complex set of
images. The Optimization sub-tab allows you to sort graphics assets (fonts, images, binaries) by Name, Size, and number of widget References.
This makes it much easier to find and edit an image by its name rather than order of creation.
Font Assets
Provides information on the Font Assets features.
Description
The Font Assets window is launched from the Graphics Composer’s Asset menu.
Note:
There are three dimensions to text support: Languages, Fonts, and Strings. Language “ID” strings are identified when an
application supports more than one language. (In the case of single language support, the language default is provided.) Fonts are
imported and organized using the Font Assets window. Strings are defined by a string name, and this name is used by widgets to
reference the string. For each string and each language supported the glyphs are defined to spell out the string’s text and the font
is chosen for that text.
• Languages are managed within the String Table Configuration window
• Fonts are managed within the Font Assets window (this topic)
• Strings are managed within the String Assets window
The following figure shows the Font Assets window from the Aria Coffee Maker demonstration.
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The Size (bytes): for a Font asset shows how much memory is needed to store all the glyphs used by the application from this font. For static
strings MHGC determines which glyphs are used by the application’s pre-defined strings and builds these glyphs into the application. For dynamic
strings (i.e. strings created during run time) ranges of glyphs are selected by the designer and these ranges are also included in the application by
MHGC. The memory needed to store all these glyphs is shown by Size (bytes): .
Window Toolbar
There are five icons on the toolbar below the Images tab:
1. Add Font From File – Adds a font asset from a file.
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2. Add Installed Font – Add a font installed on your computer.
3. Replace Existing Font Data with New Source Font – Both Add Font From File and Add Installed Font create a new font asset. This icon
allows you to update an existing font asset, importing from a file or using a font installed on your computer.
4. Rename Selected Font – Renames an existing font asset. In the example above, the Arial font was installed twice, first as a 16 point font and
second as a 12 point font. If added to the fonts assets in this order, the 12 point font will have the name Arial_1. This font asset was renamed to
Arial_Small using this tool.
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5. Delete Selected Fonts – Removes selected font assets from the application.
Sub-tabs
There are three sub-tabs to this window.
Style Sub-tab
The Size (bytes): shown represents the memory needed to store all the font’s glyphs. The application only stores the glyphs that are used by static
(build-time) strings and by predefined glyph ranges to support dynamic (run-time) strings.
The choices for Memory Location must be defined before the font can be assigned. Go to the Memory Configuration window to add a new location
before using it in this sub-tab.
Each font asset consists of a font, size, and some combination of the { Bold, Italic, Anti-Aliasing } options, including selecting none of these
options. If you need bold for one set of strings and italic for another, then you will need two font assets, one with Bold checked and a second with
Italic checked. The same applies for font sizes. Each font size requires its own font asset. Thus if you need two sizes of Arial, with plain, bold, and
italic for each size, you will need 6 separate assets (6 = 2 Sizes x 3 ).
Glyphs are normally (Anti-Aliasing off) stored as a pixel bit array, with each pixel represented by only one bit. Turning on Anti-Aliasing replaces
each pixel bit with an 8-bit gray scale, thereby increasing font storage by a factor of 8!
What if a font is chosen that does not support the character types of the text used for a particular language in the application? How can you test
and debug this? There a basically two ways:
• Use an external font viewer to examine if the needed glyphs exist
• Configure, build, and run the application and verify the strings are correctly rendered
If the glyphs are not available they will be rendered as rectangles ( ).
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Strings Sub-tab
The Bound check box accomplishes the same thing as assigning a font to a text string in the Strings Assets window (Window:Strings menu).
Assigning a string to a font means that the font will generate glyphs for that string. This is just another way to accomplish the binding of the string
text to font.
This sub-tab is also useful in a complicated graphics design to see how many strings use a particular font. Lightly-used or unused fonts can be
eliminated to free up internal Flash memory.
Glyphs Sub-tab
Note:
The word “glyph” comes from the Greek for “carving”, as seen in the word hieroglyph – Greek for “sacred writing”. In modern
usage a glyph is an elemental or atomic symbol representing a readable character for purposes of communicating via writing.
The Glyph sub-tab is only used when your application supports dynamic strings. For static (build-time) strings MHGC automatically determines
which font glyphs are used based on the characters present in all the strings used by the application’s graphics widgets. Only these glyphs are
included as part of the application’s font assets. With dynamic (i.e. run-time) strings this is not possible. This sub-tab allows you to specify which
range of glyphs will be used by run-time strings. Once glyph ranges are defined, these glyphs are added to the font glyphs used by static strings.
The Create New Custom Import Range icon ( ) allows you to input a new glyph range for the font. Selecting this icon opens the Font Assets
window.
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String Table Configuration
Provides information on the String Assets features.
Description
The String Table Configuration window is launched from the Graphics Composer’s Asset menu.
Note:
There are three dimensions to text support: Languages, Fonts, and Strings. Language “ID” strings are identified when an
application supports more than one language. (In the case of single language support, the language default is provided.) Fonts are
imported and organized using the Font Assets window. Strings are defined by a string name, and this name is used by widgets to
reference the string. For each string and each language supported the glyphs are defined to spell out the string’s text and the font
is chosen for that text.
• Languages are managed within the String Table Configuration window (this topic)
• Fonts are managed within the Font Assets window
• Strings are managed within the String Assets window
Within this window, the Languages supported by the application are defined and the encoding for all application glyphs selected.
The “ID” string used for each language is merely for ease of use in building the texts to be used. “English”, “American”, or any other string can be
used to identity that language, as long as it is understood by the application’s creator when selecting the text to be used for that particular
language. Then the application can switch to supporting one of its languages using “ID” strings defined.
Here is an example string asset definition, taken from the Aria Coffee Maker demonstration. This application supports English, French, Italian, and
German. The text string “InfoText_Desc9” uses the Arial font, and text for each language is specified within the String Assets window.
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Any number of languages can be defined as long as there is memory to store the strings needed.
The following figure shows the String Table Configuration for an application that uses English, Spanish, and Chinese.
The size of all the strings for each language is shown in the Size column. String size represents the memory allocated for glyph indices for all the
strings supporting that language. A language can be enabled/disabled via the check box in the Enabled column. Disabling a language removes it
from the application build but keeps it in the project.
Window Toolbar
There are three icons on the toolbar:
1. Add New Language – Adds a new Language.
2. Set Default Language – Sets the application’s default language. Note, this is different than the abc tool on the Graphics Composer Window
toolbar. The abc icon sets the preview language for the Screen Designer panel only. This icon sets the language used by the application after
boot-up.
3. Remove Selected Language – Removes language from the application.
Clicking Add New Language opens a new line, allowing you to select and edit the new language’s “ID” string.
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Then, for every string defined in the application there will be a line to define the needed text, and to specify the font to be used.
If you don’t provide a value for the new language the string will be output as a null (empty string). If you don’t provide a Font selection then the
string will be output as a series of blocks (?).
The Aria User Interface Library primitive, LIB_EXPORT void laContext_SetStringLanguage(uint32_t id), allows the application to
switch between languages using the Language ID #defines are specified in the application’s gfx_assets.h file.
Sub-tabs
There are two sub-tabs to this window.
Language Definitions Sub-tab
This sub-tab shows the languages defined for the application. A Language can be enabled/disabled to include or exclude it from the application’s
generation/regeneration under MPLAB Harmony Configurator (MHC). New languages can be added by specifying a text string for the language.
With a new language, go to the String Assets window to specify the text and fonts for all defined strings.
Encoding Sub-tab
Selecting the Character Encoding Format Selection Dialog icon gives you three choices for how the characters in all strings in the graphics
application are encoded:
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The default is ASCII. It is typically the most efficient in terms of memory and processing, but it does not support as many glyphs. Chinese text
should be encoded in UTF-8 or UTF-16, but Western language text can be encoded in ASCII to save memory. The trade-off between ASCII,
UTF-8, and UTF-16 depends on the application. Changing from UTF-8 to UTF-16 will double the size of all strings in the application. This is
because the sizes of all glyph indices double in size. (String sizes are the sizes of glyph reference indices, not the size of the particular font glyphs
used to write out the string.)
The memory utilization resulting from an encoding choice can be seen in the Summary sub-tab of the Memory Configuration window.
String Assets
Provides information on the String Assets features.
Description
The String Assets window is launched from the Graphics Composer’s Asset menu.
The String Assets window supports managing the strings in the application. Strings are referenced by graphic widgets using an application-wide
unique name. This unique name is built into an enumeration that the application’s C code uses. For each language supported text is defined and a
font asset selected.
Note:
There are three dimensions to text support: Languages, Fonts, and Strings. Language “ID” strings are identified when an
application supports more than one language. (In the case of single language support, the language default is provided.) Fonts are
imported and organized using the Font Assets window. Strings are defined by a string name, and this name is used by widgets to
reference the string. For each string and each language supported the glyphs are defined to spell out the string’s text and the font
is chosen for that text.
• Languages are managed within the String Table Configuration window
• Fonts are managed within the Font Assets window
• Strings are managed within the String Assets window (this topic)
The following figure shows an example taken from the Aria Coffee Maker demonstration. The string name, InfoText_Desc9, defines a string asset
that is used by the application.
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The Total Size in Byte: for a string asset represents the memory needed to store the glyph indices for all the text defined for that string asset.
Adding more text will increase the number of glyph indices needed thus increasing the size of the string’s memory. Adding another language will
do the same, since the number of glyph indices also increases. Changing the font does not increase the size of the string’s memory, but may
increase the size of the font chosen if it is a “bigger” font and adds more glyphs to the new font. (By “bigger” we mean a font with more pixels, for
example because it is bigger in size, or perhaps because it is anti-aliased and the original font was not.)
Note:
The Reference Count shown reflects the number of build-time references to the string. Dynamic uses of a string, such as through
macros or events, is not reflected in this number.
Window Toolbar
There are four icons on the toolbar:
1. Add New String – Adds a new string.
2. Rename Selected Item – Allows renaming the string.
3. Create New Virtual Folder – Creates a new virtual folder, allowing you to organize strings in a hierarchy. Here’s an example reorganization of
the existing strings. Note the order of virtual folders or items in the list is strictly alphabetical. Virtual folders and string asset organization is
merely for the convenience of the developer. Neither has an effect on how the application is built.
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4. Delete Selected Items – Deletes selected strings from the application.
Creating New Strings
To create a new string, click Add New String ( ).
Selecting this icon opens the Add String dialog to name the string. The text chosen for the string name should be acceptable as a C variable.
After entering the new string’s name and click Create, the following String Assets window appears.
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In the String Assets window, there will be a line for each of the languages defined for the application. Provide the string text and font for each of
the languages. If you don’t provide the text an empty string will be used instead. Not providing a font causes the string to be rendered as a string of
boxes ( ).
Binary Assets
Provides information on the Binary Assets features.
Description
The Binary Assets window is launched from the Graphics Composer’s Asset menu.
Selecting the Add Binary File icon ( opens the Import File dialog.
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This supports any formatted binary file. Developers can then add a custom-coded decoder to support the format implied by the imported file. (A
future version of the GFX library will include a bin2code utility in support of this feature.)
MHGC Tools
The Tools menu supports managing all graphics events, using a global palette, and estimating heap memory usage.
Event Manager
This section provide information on the Event Manager.
Description
The Graphics Composer Event Manager provides a GUI interface to manage all of the events associated with a graphics application. In a general
sense, an event is an action or occurrence that is processed by software using an “event handler”. Button pushes or keystrokes are widely
recognized and handled events. Events related to a touch screen are commonly called “gestures”. This GUI allows the assignment of actions to
events associated with graphics widgets and to events outside of the graphics library. Under the Graphics Composer Event Manager tab there are
two sub-tabs, one for “Events” and a second for “Macros”.
“Events” under the first tab are generated from within graphics widgets and can manipulate the properties of screen widgets or set semaphores
that engage with the rest of the application. “Macros” are executed outside of graphics widgets by other parts of the application. “Macros” allow the
application to change widget properties or behavior.
Both “Events” and “Macros” event handlers can be built using collections of “Template” actions or using “Custom” developer-provided code. Most
widget properties have an associated Template action that can be used to manipulate that property in an event handler (either “Event” or “Macro”).
For more information on properties and related actions, see the discussion on the Properties Window below.
To explore these capabilities, let’s look at the Aria Quickstart project after the completion of the Adding an Event to the Aria Quickstart
Demonstration Quick Start Guide.
Graphics Composer Events
The Graphics Composer Screen Designer shows that there is one layer and three widgets in this demonstration.
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Of the three widgets shown above, only ButtonWidget1 can have events associated with it, one for button pressed and a second for button
released. This can be seen in the Graphics Composer Event Manager window, which is available from the Tools menu:
The events shown under “ButtonWidget1” are mirrored in the widget’s properties. Selecting or clearing an event in one window does the same in
the other window, thus enabling (selecting) or disabling (clearing) the corresponding event.
We can add a Check Box widget to the applications display and then use the Event Manager to assign actions to the widget’s events. A Check
Box widget has two events, one for being “Checked” (i.e., selected) and another for being “Unchecked” (i.e., cleared). Enabling the “Checked”
event then allows the selection of the action or actions for that event.
The Actions: sub-window has five tool icons for managing the actions associated with an event:
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Clicking the Create New Action icon ( ) opens the Action Edit dialog.
If you select Custom and click Next, you will see the following dialog. Unfortunately, there is no C code error checking with this window. It just
copies the code into libaria.c and libaria.h. If there is a problem with the code you will not know about it until you try to build your
application. An alternative is just to type a comment such as /*My event goes here*/, generate the code, and then find out where this
comment landed in the code. (Typically, inside libaria_events.c, or libaria_macros.c) You can then write the action routine from within
the MPLAB X IDE editor and compile just that file to debug the code written.
If you select Template, the Action Edit dialog will update, as follows. Select ButtonWidget1.
As shown previously, you next need to select the widget that you want to manipulate with this action. Note that the event originated with
CheckBoxWidget1, but the event’s action can manipulate any of the existing widgets. In this case, ButtonWidget1 has been selected. Clicking Next
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will then bring up a list of the actions available in manipulating a button widget.
You can select the “Set Text” action, which will then change the button’s text property, followed by NEXT, which will open a dialog to select the text
string for this action.
You can then select from the available (already defined) strings which text to use for the button’s text field. Press the Finish button to complete the
definition of this action.
Screen Events
As shown previously, the Graphics Composer Event Manager, Events sub-tab supports screen events when the screen is visible (On Show) and
hidden (On Hide). These events can define event handlers based on Template actions or Custom, user-defined code.
Widget Events
Not all widgets can generate an event. For example, a Label Widget has nothing to generate, it just sits there on the screen, labeling. Here is a list
of the widgets that can generate an event:
• Button – Pressed and Released events
• Check Box – Checked and Unchecked events
• Draw Surface – Draw Notification event
• Image Sequence – Image Changed event
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• Key Pad – Key Click event
• List Wheel – Select Item Changed event
• List – Selection Changed event
• Progress Bar – Value Changed event
• Radio Button – Selected and Deselected event
• Scroll Bar – Value Changed event
• Slider Widget – Value Changed event
• Text Field – Text Changed event
• Touch Test – Point Added event
Graphics Composer Macros
Macros implement event handlers for events that originate outside of graphics primitives such as widgets and are designed to change or
manipulate widgets inside of the graphics part of an application. (Events that originate outside of graphics and don’t touch the graphics part of the
application are outside of the scope of the Graphics Event Manager and are not discussed here.)
The following figure shows a simple example of a macro.
The toolbar for Macros has three icons.
Creating a new macro and selecting its actions is just like that of a widget event:
1. Create a new macro using the “Create New Macro” tool. The check box to the left of the new macro’s name enables/disables the macro.
Clearing it removes the macro from the next code generation.
2. Select the new macro and edit it using the second icon (shown previously).
3. In the Actions: window, select Create New Action. An optional name can be provided in the Name: box. You can then choose to use a
Template and select a predefined action or Custom to create a customized action.
4. If you chose a “Custom” action, proceed as discussed previous in Graphics Composer Events. When using templates the next step is to
choose the target widget for the action. This choice is limited to those only the widgets in the currently “active” screen. If your application has
multiple screens and the widget you are targeting is not part of the currently active screen you need to change the active screen.
• Changing the active screen can be done by selecting the corresponding screen tab at the bottom of the Graphics Composer Screen
Designer
• Alternately, you can switch using the Graphics Composer Manager:Screens tab
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5. After selecting the target widget for this macro, click Next button to select an action related to this widget. (Just as with template-based widget
events.) The macro can contain more than one action, targeting more than one widget.
Heap Estimator
Provides information on heap space allocation.
Description
Many parts of a graphics design are implemented using memory allocated from the application’s heap space. Therefore, it is important to allocate
sufficient memory for the heap. This tool can estimate heap usage by the allocation based on the widgets, layers, screens, and decoders currently
in the design.
When launching the tool from the Tools menu, the Heap Configuration window appears.
Clicking Calculate estimates heap usage. The following figure shows what occurs within the Aria Quickstart demonstration if the heap space is
only 4096 bytes:
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The Summary tab shows how the estimated heap requirements was derived by summing up all the sizes shown under the “Size (Bytes)” column.
Note that the largest contribution comes from the screen requiring the largest heap allocation (in this case MainMenu).
If there is insufficient memory allocated to the heap, an exclamation point ( ! ) appears in the window. If you hold your mouse pointer over this icon,
the following message appears:
You can click Set MHC Heap Value to reset the heap allocation to match the estimated requirements. Selecting Add to MHC Heap Value adds
the estimated heap requirements to the current heap value. (In the case above, this would change the heap allocation to 4096+10664 bytes.)
Alternately, you can set the heap allocation to a larger value by going to the MPLAB Harmony Configurator window, selecting the Options tab and
setting the Heap Size within Device & Project Configuration > Project Configuration.
The Screen Details tab (from the Aria Showcase demonstration) shows screen-by-screen the heap space needed for each layer and widget on the
screen selected.
Note:
After you have updated the Heap Size, either using the Heap Estimator tool or by directly editing the value as shown above, you
must regenerate the project using the Generate Code button. This will update the actual heap size value used in building the
application.
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Clicking the “Name” column will alphabetize the list. Clicking the “Size (Bytes)” column sorts the assets by size, with the largest at the top and
smallest at the bottom.
This sub-tab can help in managing the application’s utilization of heap space. For example, excess use of cached backgrounds for widgets can
become ruinously expensive, expanding the application’s need for heap well beyond the capabilities of the device. As an example, consider a
screen label from the Aria Showcase demonstration.
The Heap Estimator tool shows that if caching is enabled for the label’s background, this widget requires 23699 bytes of heap to store the widget.
Note that the label is twice the size of the text it contains, so one way of reducing the cost of the widget is to make it smaller, thereby reducing the
number of background pixels that must be stored. If the label is resized, the heap allocation is reduced to 11688 bytes, which is a drop of
appoximately 50%. Finally, if the background is changed from “Cache” to “Fill” the widget only needs 188 bytes.
The lesson learned is to use Cache as a background only for widgets where it is absolutely necessary and to make the “cached” widgets as small
as possible.
Global Palette
Provides information on the Global Palette features.
Description
The Global Palette window is launched from the Graphics Composer’s Asset pull-down menu.
Using a Global Palette enables frame buffer compression for the LCC graphics controller. It creates a 256 color look up table (LUT) and then
changes the entire user interface design to adhere to that LUT. Frame buffers are stored as 8 bits/pixel (bpp) indices rather than 16-32 bpp colors.
The display driver performs a LUT operation to change each LUT index into a color before writing to the display/controller memory. This enables
the use of double buffering, without using external memory, on devices that could not support it before. It also supports single buffering on larger
displays. Of course, running the LUT requires more processing on the host. Currently only the LCC graphics controller supports this feature. The
Aria demonstration Aria Basic Motion is an example of how using a Global Palette greatly improves the efficiency and capabilities of a design.
Enable the Global Palette by clicking on the Enable Global Palette check box in the window or using the File > Settings menu. the Global palette
can always be disabled. MHGC will then restore the project back to its original configuration.
If the global palette is enabled you will have to change the MHC configuration of the Graphics Controller to match. For the LCC controller, enable
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"Palette Mode". For the GLCD controller, change the Driver Settings > Fame Buffer Color Mode to "LUT8".
The results of enabling the Global Palette:
• 8bpp frame buffers. In the case of the most common demonstrations this means a 50% reduction in the size of the frame buffer.
• This also opens up the capability to support a single frame buffer for some larger displays.
What is lost by enabling the Global Palette:
• First and foremost - No Dynamic Colors. Dynamic colors are unlikely to match up with an entry in the global palette’s look-up table.
• No alpha blending capability. The level of alpha blending can be changed during run-time. (See No Dynamic Colors.)
• No JPEGs or PNGs. Again, no dynamic colors. All images in MGHC will be changed to the color mode of the project, and generated as Raw.
• No font anti-aliasing. Again, no dynamic colors. While the 8-bits/pixel for each glyph is known, the color of the text depends on the color
scheme used, and color schemes can change at run time.
• Additional overhead when performing LUT (index->color) operations in the display driver.
The following figure shows the default “Global Palette” when Project Color Mode is set to RGB_888.
This default palette is good for designs that use a wide array of colors. MHGC also supports developing a custom palette by importing an image
defining the palette or by analyzing the pixel colors already in use by the application’s images. The palette’s color mode is determined by the
Project Color Mode, which is determined by the graphics controller.
Clicking on an entry in the palette with bring up the Color Picker dialog window, allowing you to edit the entry’s color.
Window Toolbar
There are four icons on the toolbar:
1. Import From Image File - Importing a global palette from an image file. Selecting this brings up the following warning. Images can be imported
as a BMP,.GIF, JPEG, and PNG (but not TIFF).
2. Auto-Calculate Palette – Calculates a new palette using the current design. Selecting this brings up the following warning.
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• Selecting Yes opens a status window that shows the progress made in selecting a palette of 256 colors
• This can be lengthy operation, but it will effectively generate a palette better tailored to the design. However, extreme (or rare) colors will be
changed to nearby, more-plentiful colors, thereby eliminating some of the contrast in images. Whites will tend to darken and blacks lighten. This
can be remedied by editing the calculated palette to whiten the whites, darken the blacks, and make other colors closer to the original. This of
course may increase the posterization of the image, but that is a natural trade-off in using only 256 colors.
3. Reset to Default – This returns the Global Palette to its default values, which opens the Reset Global Palette dialog.
4. Enable Global Palette – This performs the same function as File > Settings: Using a Global Palette. Selecting this opens the Enable Global
Palette Mode warning.
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Widget Colors
Provides information on widget coloring.
Description
Widget Colors
Widget coloring can be customized by creating additional color schemes and assigning these customized schemes to a subset of the widgets
uses. For example, a ButtonColorScheme could be customized and used only for Button Widgets.
To help highlight the different colors available for each widget, a “CrazyScheme”, with extreme contrast among the 16 available colors, was used
as the color scheme for each widget:
Use this color scheme to help identify the relevant colors for the widgets listed below.
The left column shows the coloring assignments for a Bezel boarder. The right side shows Line/No Border color assignments.
Widget With Bezel Border Widget With Line or No Borders
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Code Generation
This topic describes using the graphics composer to generate code.
Description
MPLAB Harmony Graphics Composer data is generated the same way as the rest of the project within MHC through the Generate button.
libaria_harmony.h/c – These files provide the interface that binds libaria to the overall MPLAB Harmony framework. They contain the
implementations for the standard state management, variable storage, and initialization and tasks functions. If the touch functionality is enabled
then the touch bindings are also generated in libaria_harmony.c.
libaria_init.h/c - These files contain the main initialization functions for the library state and screens. The header file contains all predefined
information for the library state including screen IDs, schemes, and widget pointers. The main initialization function initializes all schemes and
screens, creates all screen objects, and sets the initial state of the library context. As each screen must be capable of being created at any time,
each screen has a unique create function that can be called at any time by the library. The libaria_init.c file contains these create functions.
libaria_events.h/c – The event files contain the definitions and implementations of all enabled MHGC events. Each event implementation will
contain all generated actions for that event.
libaria_macros.h/c – The macro files contain the definitions and implementations of all defined MHGC screen macros. A macro is similar to an
event in that it can contain actions. However, it is meant to be called from an external source such as the main application.
libaria_config.h – This file contains configuration values for the library. These are controlled through settings defined in the MHC settings tree.
gfx_display_def.c – This file contains generated definitions for enabled graphics displays.
gfx_driver_def.c – This file contains generated definitions for enabled graphics drivers.
gfx_processor_def.c – This file contains generated definitions for enabled graphics processors.
gfx_assets.h/c – These files contain generated asset data.
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Advanced Topics
This section provides advanced information topics for MHGC.
Adding Third-Party Graphics Products Using the Hardware Abstsraction Layer (HAL)
This topic provides information on using the Hardware Abstraction Layer (HAL) to add third-party graphics products.
Description
The architecture of the MPLAB Harmony Graphics Stack is shown in the following diagram.
Hardware Abstraction Layer (HAL)
The HAL is a software layer that serves as a gatekeeper for all graphics controller and accelerator drivers. This layer is configured at initialization
by the underlying graphics drivers and provides functionality such as buffer management, primitive shape drawing, hardware abstraction, and draw
state management. This layer serves as a means of protection for the drivers, frame buffers, and draw state in order to prevent state
mismanagement by the application.
Third-Party Graphics Library
The third-party graphics library can be used with the MPLAB Harmony framework to perform the graphics operations desired by the application.
The third-party library has access to the HAL, which has been configured to service the frame buffer which is filled by the third-party graphics
library.
The third-party graphics library can access the MPLAB Harmony framework drivers such as touch drivers, graphics controller driver, and display
driver through the HAL. The draw pipeline and the user interface (UI) design files come from the third-party graphics library. The third-party
graphics library needs the frame buffer location to fill the frame buffer with the pixel values. Or, in case of external controllers, it would need a
function to access the controller drivers to output pixels on the display. The HAL provides the third-party graphics library with the frame buffer
location or the API to communicate the pixel values to the external controllers.
The following figure from the MPLAB Harmony Configurator (MHC), shows the selections made in the Graphics Stack to enable the needed
graphics display and controller features. Note that the Draw Pipeline for the MPLAB Harmony Graphics Stack has been disabled to assure that the
third-party graphics alone is taking effect. The MPLAB Harmony Graphics Configurator (MHGC) is also not enabled, as the design tools from the
third-party graphics library are used to generate the UI graphics. The LCDConf.c file has appropriate APIs for the third-party graphics library to
communicate through the HAL with the display drivers and the framebuffer.
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Example Demonstration Project
The Aria demonstration project, emwin_quickstart, has three configurations. Each configuration has an API named LCD_X_Config, which is
generated with the relevant calls for SEGGER emWin to communicate with the display driver and obtain the frame buffer location pointer to write
the pixel data to it. For PIC32MZ DA and PIC32MZ EF configurations, the frame buffer pointer address is provided to SEGGER emWin by the
HAL. For the S1D controller on PIC32MX devices (pic32mx_usb_sk2_s1d_pictail_wqvga), The pixel write function pointers are assigned to the
appropriate S1D driver APIs, which allow SEGGER emWin to write to the display controller.
Speed and Performance of Different Image Decode Formats in MHGC
Provides information and recommendations for image decode formats.
Description
MHGC supports various image formats and the MHGC Image Assets Manager provides the ability to convert and store a source image into to the
following formats
• Bitmap RAW
• Bitmap Raw Run-Length Encoded (RLE)
• JPEG
• PNG
• Predecoded RAW Bitmap in DDR (PIC32MZ DA)
The following table shows the relative rendering time and Flash memory requirements of the different image formats in the MPLAB Harmony
Graphics Library. The rendering time includes decoding the image and drawing it to the screen. This information is helpful when optimizing a
MPLAB Harmony graphics project for performance and/or Flash memory space. For example, as shown by the red highlighted text in the table, a
40x40 pixel 16-bit RAW image renders 2.38 times faster and uses 2.59 times more Flash space than a JPEG image.
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Predecoded Images in DDR (RAW)
For PIC32MZ DA devices with DDR, the MHGC Image Asset Manager provides an option to predecode images from Flash and store them into
DDR as RAW images. The GPU is used to render the decoded image from DDR to the frame buffer. This provides a faster render time than an
equivalent RAW image in Flash memory, specifically for large images (up to 10 times faster for a 200x200 image). Conversely, predecoding small
images 40x40 pixels or smaller in DDR may not render faster due to the additional overhead of setting up the GPU.
Recommendations:
• If there is adequate DDR memory available, consider predecoding images to DDR for best performance
• Using JPEG images and predecoding them into DDR can provide the best rendering performance and most Flash memory savings.
Note:
The images are decoded from Flash to DDR memory by the Graphics Library during initialization and may introduce delay at
boot-up, depending on the number and size of the images.
RAW Images
RAW images provide fast rendering time, as there is no decoding needed. However, depending on image content, it can be two times larger than a
Run-Length Encoded (RLE) image and about 3 to 10 times larger than a JPEG.
Recommendation:
For small images that are to be rendered frequently, consider using a RAW image for better performance
JPEG Images
JPEG images provide the most Flash space savings, but are slower to render compared to RAW and RAW RLE.
Recommendations:
• If images are large and not used frequently, consider using the JPEG image format to save flash memory space
• If DDR memory is available, consider predecoding JPEG images in DDR for better rendering performance
Run-Length Encoded RAW Images
In terms of rendering speed and size, RAW RLE images are in between RAW and other compressed formats like JPEG or PNG. Depending on the
image contents, RAW RLE can be approximately 1.5 times faster than JPEG, but could be significantly larger in size for large images. Again,
depending on the image content, RAW RLE can be about half the size and performance of a RAW image.
Recommendation:
If optimizing your application for both speed and flash size consider using RAW RLE images
PNG Images
Among the image formats, PNG is slowest to render and requires more memory to decode.
Recommendations:
• Unless fine levels of alpha-blending are needed, it is better to use other image formats to achieve the best performance. Use the MHGC Asset
Manager to convert the source PNG image and store it in a different image format.
• If you would like to use an image with a transparent background, it may be better to use a RAW RLE image with background color masking to
achieve the same effect with better performance than a PNG. Color masking is supported in the MHGC Image Asset Manager.
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Draw Pipeline Options
This section details how to use the Graphics Pipeline.
Description
The nominal rendering pipeline for an image is shown in the following figure.
The order of rendering for other widgets may differ. For example, for a colored rectangle the color mask is first checked. If the rectangle’s fill
matches the mask color defined then there is nothing to draw.
Graphics Pipeline
Provides information on the graphics pipeline.
Description
Layer Clipping
In order of the processing, Layer Clipping is first applied to the image. If the image extends beyond the edges of the layer that contains it then
those pixels are not drawn. Failure to clip out-of-bound pixels can cause the application to crash. The following figures shows an example of layer
clipping:
Before applying layer boundaries:
After applying layer boundaries:
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Rectangle Clipping
Next, the image is clipped to the boundaries of any widgets that contain it as a parent, such as a rectangle.
Before applying the clipping rectangle.:
After applying the clipping rectangle:
Color Masking of Pixels
Pixels in the image are matched to a mask color. If the colors match the pixel is discarded (not drawn). In the following example, the black border
of the image is removed by defining the mask color to be black.
Before applying color mask:
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After applying color mask:
Orientation and Mirroring
The logical orientation of the graphics design may not match the physical layout of the display. Pixels may need to be reoriented from logical to
physical space before being rendered.
Pixels may also need to be flipped (mirrored) before being rendered.
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Alpha Blending
Each pixel drawn is a composite of the image color and the background color based on the alpha blend value defined by a global alpha value, the
pixels alpha value, or both.
Before alpha blending:
After alpha blending:
Color Conversion
The image color format may not be the same as the destination frame buffer. Each pixel must be converted before it is written. In the following
example, the image is stored using 24 bits per pixel; however, the frame buffer uses 16 bits per pixel.
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Frame Buffer Write
The final stage in rendering an image is to write each-color converted pixel to the frame buffer.
Graphics Pipeline Options
Provides information graphics pipeline options.
Description
Each stage in the graphics pipeline adds overhead to the rendering. Stages can be removed from processing using MPLAB Harmony Configurator
(MHC) options for the Draw Pipeline, found by selecting MPLAB Harmony Framework Configuration > Graphics Stack.
For example, the Alpha Blending stage can be disabled if your graphics application does not use alpha blending. If the color mode of the display
matches the color mode of all images you can disable Color Conversion. Disabling unneeded stages can improve performance and reduce code
size.
Also, a graphics controller driver may add additional stages, or opt to bypass stages completely depending on the capabilities of the graphics
hardware supported by the driver.
Improved Touch Performance with Phantom Buttons
This topic provides information on the use of phantom buttons to improve touch performance.
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aria_coffeemaker Demonstration Example
Provides image examples with buttons in the aria_coffeemaker demonstration.
Description
Small buttons are hard to activate on the screen. The use of phantom (invisible) buttons can improve touch performance without increasing the
size of the visible footprint of the button on the display.
The aria_coffee_maker has a sliding tray on each side of the display. Sliding a tray in, or out, is accomplished by a phantom (invisible) button.
Looking at the left tray, we see the three parts of this phantom button.
1. LeftTrayLid: An invisible button widget, whose outline is shown in blue. This area is the touch field.
2. ImageWidget5: An image widget containing a hand icon, providing a visual clue as to how to manipulate the tray.
3. The Release Image and Pressed Image: These are defined as part of the button widget properties. The Pressed Image has a darker coloring
than the Released Image. This difference is what shows the user that the button has been pressed.
The drawing hierarchy for this part of the design is shows that ImageWidget5 is a daughter widget to the LeftTrayLid button widget.
Examining the properties of the LeftTrayLid button widget reveals more about how this works. The following figure demonstrates these three
properties.
1. The Border is defined as None.
2. Background Type is defined as None.
3. The different images used will show when the button is Pressed or Released.
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By setting the border and background to None, the button is invisible. Only by providing different images for Released versus Pressed does the
user know when the button has been pressed.
The actual touch region defined by the button is much larger than the images shown on the display. This extra area increases the touch response
of the display.
Small Buttons Controlled by Phantom Buttons
Provides information on phantom button control of small buttons.
Description
When the border is not set to None, and the background is not set to None, the button widget provides a direct visible clue to the user when it is
pressed. Which can be seen in the following figure with the button from aria_quickstart. In aria_quickstart, ButtonWidget1 has a bevel border, and
a fill background.
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Let’s use aria_quickstart to demonstrate how to control ButtonWidget1 using a phantom button to surround it, thereby increasing touch
responsiveness.
When using a bevel border and filled background, the button provides visible feedback when it is asserted.
To use this feedback mechanism instead of images, there is a way to have a small button on the display, with a larger touch zone provided by
another phantom button.
Steps:
1. Click on ButtonWidget1 in the Screen Designer panel. Go to the Properties Editor panel for the widget and uncheck the Enabled property to
disable the button. Enable Toggleable so that this button will have a memory.
2. Drag a new button from the Widget Tool Box panel and center it around ButtonWidget1. In the Properties Editor panel for this new button,
change the name of the widget to PhantomButton. Change the Background Type to None. Leave the Border set as Bevel for now. The
following figure displays the new button in the Screen Designer panel:
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The Properties Editor panel should display the following information.
3. In the Tree View panel, drag ButtonWidget1 to be a daughter widget of PhantomWidget. When PhantomWidget is moved, ButtonWidget1 will
move along with the parent.
4. Click on PhantomButton again in the Screen Designer panel and move to the Properties Editor. Enable both the Pressed and Released events.
Then click on the (…) icon to define the events. (See the following two steps.)
5. Defining the Pressed Event.
Click on the (…) icon. In the Event Editor, under Pressed dialog, click the New icon to define a new event. In the Action Edit Dialog that next
appears, leave the selection on the template and hit the Next button. In the next window, select the target of the event. We want to change the
state of ButtonWidget1, so select it and hit Next. The next dialog shows all the template actions that we can use to modify ButtonWidget1. Choose
Set Pressed State and hit Next. Set the Argument to Enable Pressed. Name this event Set Press state for ButtonWidget1 then hit Finish. Leave
the Event Editor by hitting Ok.
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6. Defining the Released Event.
Click on the (…) icon. In the Event Editor, under Released dialog, click the New icon to define a new event. In the Action Edit Dialog that next
appears, leave the selection on the template and hit the Next button. In the next window, select the target of the event. We want to change the
state of ButtonWidget1, so select it and hit Next. Choose Set Pressed State and hit Next. Leave the Argument disabled. Name this event Unset
Press state for ButtonWidget1 then hit Finish. Leave the Event Editor by hitting Ok.
7. Generate the application from the MPLAB Harmony Configurator main menu.
8. From the MPLAB main menu, build and run the project. To verify that ButtonWidget1 does change, click outside of the original boundaries.
9. As a final step, hide the PhantomButton by changing its border to None. Next, Generate the code again from MHC. Finally, build and run the
project from MPLAB and see how much easier it is to assert ButtonWidget1 using a phantom button.
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Importing and Exporting Graphics Data
This topic provides information on importing and exporting graphics composer-related data.
Description
The MPLAB Harmony Graphics Composer (MHGC) provides the capability for users to import and export graphics designs. The user can export
the state of an existing graphics composer configuration or import another graphics composer configuration from another project.
Importing Data
1. To import a graphics design into MHGC, select File > Import. The Browse for MPLAB Harmony Graphics Composer XML file dialog appears,
which allows the selection of a previously exported Graphics Composer .xml file, or the configuration.xml file that contains the desired
graphics image.
2. After selecting a file and clicking Open, you will be prompted whether to overwrite existing data.
3. If you selected a composer_export.xml file, clicking Yes will replace the current graphics design with the new design.
4. Otherwise, if you selected a configuration.xml file, you will be prompted to import the data into the current graphics design. Click Yes to
replace the current graphics design with the new design.
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Exporting Data
1. To export a graphics design from MHGC, select File > Export. The Select File Location for MPLAB Harmony Graphics Composer XML file
dialog appears.
2. To export a graphics design using a configuration.xml file, use the Save Configuration utility from the MPLAB Harmony Configurator
(MHC) toolbar.
MPLAB Harmony Graphics Composer User's Importing and Exporting Graphics Data
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Index
A
Adding Third-Party Graphics Products Using the Hardware Abstsraction
Layer (HAL) 75
Advanced Topics 75
aria_coffeemaker Demonstration Example 83
B
Binary Assets 57
C
Code Generation 74
D
Draw Pipeline Options 78
E
Event Manager 58
F
Font Assets 46
G
Global Palette 65
Graphics Composer Asset Management 36
Graphics Composer Window User Interface 4
Graphics Pipeline 78
Graphics Pipeline Options 82
H
Heap Estimator 63
I
Image Assets 41
Importing and Exporting Graphics Data 88
Improved Touch Performance with Phantom Buttons 82
Introduction 3
M
Memory Configuration 36
Menus 10
MHGC Tools 58
MPLAB Harmony Graphics Composer User's Guide 2
N
New Project Wizard 14
O
Object Properties 29
Options 26
P
Properties Editor Panel 28
S
Schemes Panel 24
Screen Designer Window 6
Screens Panel 22
Small Buttons Controlled by Phantom Buttons 84
Speed and Performance of Different Image Decode Formats in MHGC 76
String Assets 54
String Table Configuration 51
T
Tree View Panel 18
W
Widget Colors 68
Widget Tool Box Panel 26
Index
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MPLAB Harmony Graphics Composer
User's Guide
MPLAB Harmony Integrated Software Framework
© 2013-2018 Microchip Technology Inc. All rights reserved.
Volume III: MPLAB Harmony Configurator (MHC)
This volume provides user and developer-specific information on the MPLAB Harmony Configurator (MHC).
Description
The MPLAB Harmony Configurator (MHC) is a graphical utility used to configure MPLAB Harmony projects. MHC provides
a "New MPLAB Harmony" project wizard and a graphical user interface for configuration of MPLAB Harmony projects.
When used, it generates (or updates) a project outline, including the C-language main function and system configuration
files and stores the project configuration selections for later retrieval, modification, and sharing.
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MPLAB Harmony Graphics Composer User's Guide
This section provides user information about using the MPLAB Harmony Graphics Composer (MHGC).
Introduction
This user's guide provides information on the MPLAB Harmony Graphics Composer (MHGC), also referred to as the graphics composer, which is
included in your installation of MPLAB Harmony. MHGC is tightly coupled with the Aria User Interface Library to facilitate rapid prototyping and
optimization of the application's graphical user interface (GUI).
Description
The MPLAB Harmony Graphics Composer (MHGC), also referred to as the graphics composer, is a graphics user interface design tool that is
integrated as part of the MPLAB Harmony Configurator (MHC). MHGC is tightly coupled with the Aria User Interface Library to facilitate rapid
prototyping and optimization of the application's graphical user interface (GUI). The tool provides a "What you see is what you get" (WSYWIG)
environment for users to design the graphics user interface for their application. Refer to Volume V: MPLAB Harmony Framework Reference >
Graphics Library Help > Aria User Interface Library for more information.
The MPLAB Harmony Graphics Composer (MHGC) Tool Suite and the Aria User Interface Library provide the following benefits to developers:
• Enhanced User Experience – Libraries and tools are easy to learn and use.
• Intuitive MHGC Window Tool – Flexible window docking/undocking. Undo/Redo and Copy/Paste support. Tree-based design model. Display
design canvas control including zooming.
• Tight Integration Experience – Graphics design & code generator tools are tightly integrated, providing rapid prototyping and optimization of
look and feel
• Powerful User Interface (UI) Library – Provides graphics objects and touch support
• Multi-Layer UI design – Supported in the MHGC tool and Aria Library
• Complete Code Generation – Can generate code for library initialization, library management, touch integration, color schemes and event
handling with a single click
• Supports Performance and Resource Optimization – Draw order, background caching, and advanced color mode support improve performance
• Resource optimization – Measures Flash memory usage and can direct resources to external memory if needed. Global 8-bit color look-up
table (LUT) supports reduced memory footprint. Heap Estimator tool, which helps to manage the SRAM memory footprint.
• Text localization – Easily integrate international language characters into a design and seamlessly change between defined languages at
run-time
• Easy to Use Asset Management – Tools provide intuitive management of all graphics assets (fonts, images, text strings)
• Image Optimization – Supports cropping, resizing, and color mode tuning of images
• Expanded Color Mode Support – The graphics stack can manage frame buffers using 8-bit to 32-bit color
• Powerful Asset Converter – Inputs several image formats, auto converts from input format to several popular internal asset formats, performs
auto palette generation for image compression, supports run-length encoding. Supports automatic font character inclusion & rasterization.
• Event Management – Wizard-based event configuration. Tight coupling to enable touch user events and external logical events to change the
graphics state machine and graphics properties.
• Abstract Hardware Support – Graphics controllers and accelerators can be added or removed without any change to the application
Glossary of Terms
Throughout this user's guide the following terms are used:
Acronym or Term Description
Action A specific task to perform when an event occurs.
Asset An image, font, or binary data blob that is used by a user interface.
Event A notification that a specific occurrence has taken place.
Resolution The size of the target device screen in pixels.
Screen A discreet presentation of organized objects.
Tool An interface used to create objects.
UI Abbreviation for User Interface.
Widget A graphical object that resides on the user interface screen.
Graphics Composer Window User Interface
This section describes the layout of the different windows and tool panels available through MHGC.
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Description
MHGC is launched from the MHC toolbar Launch Utility menu. Launching the Graphics Composer creates a new screen. Shown below is the
MHGC screen for the Aria Showcase demonstration. (If you don’t see this screen layout, reset the screen by selecting Window > Reset Dock
Areas from the window’s menus.)
Panels
By default, there are five active panels and one minimize panel on this screen:
• Screen Designer – Shows the screen design for the selected screen. Tabs on the bottom of the Screen Designer panel show the available
screens.
• Tree View – Shows the layer and widget hierarchy for the current screen.
• Screens – Manages screens in the application.
• Schemes – Manages coloring schemes in the application.
Note:
In v2.03b of MPLAB Harmony, a third tab named Options, along with Screens and Schemes was available. These properties are
now located within the File > Settings menu.
• Widget Tool Box – Available graphics widgets are shown on this panel. Widgets are added to the screen by selecting an icon and dragging or
clicking. Widget properties are discussed in the Widget Properties section below.
• Properties Editor – All properties for the currently selected object are shown in this panel.
• The MHGC Output console is parked at the bottom of the Screen Designer window. This console panel can be used to debug problems when
the Graphics Composer boots up or during its operation.
Each of the panels has a window tool icon at the upper right corner. Minimizing a panel parks it on the screen just like the Output Console.
Undocking the panel creates a new, free floating window. Redocking returns a previously undocked window to its original location on the Screen
Designer window.
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When a panel is undocked, its edges become active and support moving or manipulating the panel as an independent window.
Tool Bar
There are 18 tool bar icons on the Screen Designer Window, as described in the following figure.
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Create New Design brings up a New Project Wizard dialog that allows you to select anew the screen size, color mode, memory size, and project
type. This will erase the currently displayed design.
Save Design saves the current graphics design.
Note:
The target configuration's configuration.xml will not be updated to reflect these changes in the graphics design until one of
the following events happens:
1. The application is regenerated in MHC,
2. The target configurations are changed in the MPLAB X IDE,
3. MPLAB X IDE is exited.
In items 2 and 3 you will be prompted to save the new configuration.
Undo and Redo manipulate changes in the screen design into internal MHC memory.
Cut/Copy/Paste support the manipulation of graphics objects (widgets).
Canvas Size Dialog brings up a dialog window allowing changes in the pixel width and height of the Screen Designer panel. (Note: Dimensions
smaller than the display’s dimensions are ignored).
Center View centers the panel’s view of the screen.
Zoom In and Zoom Out allow you to change the scale of the Screen Designer’s display of the current window. Currently this only supports coarse
zooming (powers of two zooms in and out).
Toggle Line Snapping enables/disables line snapping when moving objects (widgets).
Show Grid turns the Screen Designer pixel grid on/off.
X and Y Grid Size adjust the pixel grid.
Grid Color selects the pixel grid color.
Toggle Object Clipping turns object clipping on/off.
Toggle Screen Info turns the display of screen information (X and Y axes) on/off.
Select Text Preview Language changes the language used on all text strings shown, when the application supports more than one language.
Screen Designer Window
Most of the work of the MPLAB Harmony Graphics Composer is done using the Screen Designer. This section covers the basics of how a
graphical user interface is designed using the screen designer.
Description
The following figure shows the Screen Designer window for the Aria Quickstart demonstration, with the pic32mz_ef_sk_meb2 configuration
selected. (Load whatever configuration belongs to your board and follow along.)
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The pixel dimensions of the display (480x272) are determined by the MHC Display Manager. Other configuration in Aria Quickstart can have
different size displays (such as: 220x176, 320x24, or 800x480).
This demonstration has three widgets: a label containing the title string at the top, an image of the MPLAB Harmony logo in the middle, and a
button containing the text string “Make changes. Generate. Run.” at the bottom. The label widget’s text string was first created using the String
Assets window before it was assigned to the label widget. The image assigned to the image widget was first imported using the Image Assets. The
string embedded in the button widget was also created using the String Assets window before it was assigned to the button widget.
The Tree View panel organizes the display’s widgets into groups using layers. Every display has at least one layer and complex designs can have
many more. Within the tree view, the order of layers and the order of widgets within a layer determine the draw order. Draw order goes from top to
bottom. Top-most layers and widgets are drawn first and bottom-most are drawn last. Controlling draw order is one of the ways to improve
graphics performance by minimizing redrawing.
Since the location of every widget within a layer is relative to the layer, you can move a layer’s worth of widgets by simply moving the layer. Layers
also provide inheritance of certain properties from the layer to all the layer’s widgets.
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Exploring the Screen Designer Window
We can add another widget to this screen by launching the Widget Tool Box panel into a separate window.
Next, drag a circle from the tool box onto the display. Find a place on the display for this new widget.
Besides dragging widgets onto the display, you can click on a widget in the Widget Tool Box, converting the cursor into that widget, and then click
on the screen to drop the widget in place.
Your display should now look appear like the following figure.
Note how the Tree View panel now shows the widget you just added.
Launch the Properties Editor for the circle.
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Next, change the fill property on the circle from “None” to “Fill”.
Note:
If the properties in the Properties Editor shown are not for CircleWidget1, click on the circle widget to change the focus of the
Properties Window.
When done, the screen should now appear, as follows.
Turn on Line Snapping, which enables drawing guides to assist in aligning widgets on the display.
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Next, turn on Object Clipping, which allows you to see how widgets are clipped by the boundaries of the layer that contains them.
Note: Clipping applies to layers, which can be smaller than the display.
To delete a widget, select the widget and press Delete on your keyboard or use the delete icon ( ) on the Tree View panel.
For more hands-on exploration of graphics using the Aria Quickstart demonstration, see Volume 1: Getting Started With MPLAB Harmony > Quick
Start Guides > Graphics and Touch Quick Start Guides > Adding an Event to the Aria Quickstart Demonstration.
The steps to create a new MPLAB Harmony project with touch input on a PIC32MZ EF Starter Kit with the Multimedia Expansion Board (MEB) II
display can be found in Volume 1: Getting Started With MPLAB Harmony > Quick Start Guides > Graphics and Touch Quick Start Guides >
Creating New Graphics Applications.
Menus
This section provides information on the menus for the MPLAB Harmony Graphics Composer screen.
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Description
File Menu
New – Same as the Create New Design tool icon.
Save – Same as the Save Design tool icon.
Save As – Supports exporting the design under a new name. By default, the name is composer_export.xml. See Importing and Exporting
Graphics Data for more information.
Import - Reads in (imports) a previously exported design or a ./framework/src/system_config/{board_config}/configuration.xml
file that contains the graphics design to be imported. See Importing and Exporting Graphics Data for more information.
Export – Same as Save As. See Importing and Exporting Graphics Data for more information.
Settings – Brings up Project and User Settings dialog, including:
• Project Color Mode - How colors are managed
• Using a Global Palette
• Show Welcome Dialog
• Pre-emption Level – Allows for sharing of the device’s cycles with other parts of the application
• Hardware Acceleration – Is graphics hardware accelerator enabled in software?
Exit – Closes the MHGC window and exits
The choices for Project and User Settings > Project Color Mode are:
• GS_8 - 8-bit gray scale
• RGB_332 - Red/Green/Blue, 3 bits Red/Green, 2 bits Blue
• RGB_565 - Red/Green/Blue, 5 bits Red, 6 bits Green, 5 bits Blue
• RGBA_5551 - Red/Green/Blue/Alpha, 5 bits Red/ Green/Blue, 1 bit for Alpha Blending
• RGB_888 - Red/Green/Blue, 8 bits Red/Green/Blue
• RGBA_8888 - Red/Green/Blue/Alpha, 8 bits Red/Green/Blue/Alpha Blending
• ARGB_8888 - Alpha/Red/Green/Blue, 8 bits Alpha Blending/Red/Green/Blue
Ensure that the Project Color Mode chosen is compatible with the display hardware you are using; otherwise, the colors shown on the display will
not match those shown on the Graphics Composer Screen Designer.
Using a Global Palette enables frame buffer compression for applications using the Low-Cost Controllerless (LCC) Graphics Controller or Graphics
LCD (GLCD) Controller. If the global palette is enabled, you will have to change the MHC configuration of the Graphics Controller to match. For the
LCC controller, enable "Palette Mode". For the GLCD controller, change the Driver Settings > Frame Buffer Color Mode to "LUT8".
If Using a Global Palette is enabled, the following warning appears.
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If Show Welcome Dialog is enabled, the following welcome screen appears when launching MHGC.
Note:
If you are not creating a new project you can ignore this window.
When the Preemption Level is set to zero, all dirty graphics objects are refreshed before the graphics process relinquishes control of the device.
(Dirty means needing a redraw.) With the level set to two, graphics provides maximum sharing with the rest of the application, at the cost of slower
display refreshes. A level of one provides an intermediate level of sharing.
The Hardware Acceleration check box determines whether graphics uses the device’s built-in graphics hardware accelerator in software.
Note:
You must also specify the graphics hardware accelerator in the MPLAB Harmony Framework Configuration within the MHC
Options tab. If the host device lacks a graphics processor, you will see a warning message when you try to select a processor that
does not exist on your device.
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Edit Menu
This menu implements the same functions as the first seven tool icons.
View Menu
This implements the same functions as the remaining tool icons.
Asset Menu
These menu features are discussed in Graphics Composer Asset Management.
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Tools Menu
The Event Manager, Global Palette, and Heap Estimator are discussed in MHGC Tools.
Window Menu
Selecting Console opens the Output Console for the Graphics Composer. This console panel can be used to debug problems when the Graphics
Composer boots up or during its operation.
Selecting Reset Dock Areas restores the MHGC panel configuration to the default setup by redocking all of the panels that have been undocked
into separate windows.
New Project Wizard
The New Project Wizard is launched from the Welcome dialog of the MPLAB Harmony Graphics Composer (MHGC), which supports the creation
of a new graphics design, or the importing of an existing graphics design.
Description
Welcome Dialog window
The Welcome dialog is launched when the Graphics Composer is chosen from the Launch Utility pull-down menu in the MPLAB Harmony
Configurator (MHC).
The window has three options:
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Note:
If this window does not appear, it can be re-enabled from MHGC’s File > Settings > General menu.
New Project Wizard Windows
Selecting the first icon in the Welcome dialog launches the New Project Wizard. There are four stages in the New Project Wizard: Color Mode,
Memory Size, Project Type, and Finish.
The New Project Wizard can also be launched from the first icon (Create New Design) of MHGC’s tool bar:
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If the Graphics Stack has not been enabled in MHC, an Enable Graphics Stack? dialog will appear to support enabling the Graphics Stack before
proceeding:
In the Color Mode stage you choose the Display Color Mode for the new graphics design:
This choice must be supported by the graphics controller defined in the board support package of the project configuration. (If you make a mistake
it can be corrected using MHGC’s File > Settings > Project Color Mode menu.) Click Next moves the wizard on to the next stage.
The Memory Size stage configures the Program Flash allocated to memory use. This value is only used by the Graphics Composer’s Asset menu
Memory Configuration tool. The value used in the Memory Size stage can be updated using the Configuration sub-tab of the Memory
Configuration tool window.
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Clicking Previous returns to the Color Mode stage and clicking Next moves the wizard to the Project Type stage.
There are two choices at the Project Type stage: A completely blank design, and a template design with a few predefined widgets.
Clicking Previous returns to the Memory Size stage, and clicking Next moves the wizard to the Finish stage.
If the “Template” project type was chosen, MHGC’s Screen Designer will show:
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Tree View Panel
The organization of application widgets and layers, including draw order, is managed using this panel.
Description
Example Tree View
The following Tree View (from main screen of the Aria Coffee Maker demonstration shows the tree structure for a screen with three layers.
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The tool icons for this panel support layers and managing screen objects (layers/widgets).
Drawing Order and Parent/Child Relationships
The Graphics Composer Tree View panel allows you to organize the widgets per screen in the desired drawing order (z-order). It also allows for
the user to organize the widgets into parent – child hierarchies to allow for the paint algorithm to draw the groups together in event of motion or
re-draw. Please note that this does not associate or group the widgets by functionality. (Example: a group of radio buttons might not belong to a
common parent on the screen.) This parent-child relationship is limited to the widgets location on the screen, motion on the screen and the
drawing order on the screen. (Exceptions to this general rule are the Editor > Hidden, Alpha Blending properties, and layer single versus double
buffering. These apply to the parent and all the parent's children.)
The tree is traversed depth-first. This means that the z-order goes background (bottom of z-order) to foreground (top of z-order) as we go from top
to bottom in the list of widgets, i.e., ImageWidget1, is the widget at the bottom of the z-order and the PanelWidget1 is the topmost widget on the
z-order. The tree structure can be arranged and modified by dragging the widgets and releasing it under the desired parent/child. Also, the list can
be modified by using the up/down arrows provided at the header of the Composer Widget tree window to traverse the tree.
Editor > Hidden Property for Layers
Setting Editor > Hidden hides the layer and all its children from the Graphics Composer Screen Designer but does not affect how the layer and its
children are displayed when the application is running. This can be useful when designing complex screens with overlapping layers.
Alpha Blending Property for Layers
Enabling Alpha Blending allows you to control the transparency of a layer and all its children. You can experiment with Alpha Blending in the Aria
Coffee Maker demonstration. Load the project, launch MHC, and then start the Graphics Composer Screen Designer. There are three layers
(Layer0, Layer1, Layer2) in this demonstration. Layer1 (the drag panel on the right) and Layer2 (the drag panel on the left) have Alpha Blending
enabled with Alpha Amount = 225. Setting the Alpha Amount to 255 is the same as disabling Alpha Blending (255 = no transparency). Setting the
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Alpha Amount to 0 makes the layer invisible (0 = full transparency, i.e., invisible).
The following figure shows the main screen with Alpha Blending = 225.
The following figure shows the main screen with Layer 2’s Alpha Blending = 255.
Double Buffering for Layers
Graphics double buffering for the LCC driver is enabled in the Display Manager’s Display Setting screen when the application is changed to use
external memory instead of internal. Click Configure to bring up the LCC Driver Configuration Settings Window.
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Configure the memory according to whether double buffering is to be enabled for the display’s layer or layers.
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Increasing the Buffer Count of a layer from 1 to 2 enables double buffering for the layer and all its child widgets. To prevent tearing on the display
when switching from one buffer to the other, VSync Enabled should also be selected.
Screens Panel
Application screens are managed using the Screens Panel.
Description
The Screens panel tab manages all the application’s screens, as shown in the following figure.
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Note:
These screens are examples from the Aria Showcase demonstration project
The underlined screen name identifies the primary screen (in this case, SplashScreen.) The bold screen name identifies the currently active
screen in the Graphics Composer Screen Designer window (in this case MainMenu.) The blue background identifies the selected screen (i.e., the
screen that is manipulated by the tool icons), in this case FirstScreen.
Window Toolbar
The window’s tools icons support:
1. Create New Screen – Create a new screen. You will be prompted for the name of the new screen, which will appear at the bottom of the
Screens list.
2. Delete Screen – Delete the selected screen. This removes the selected screen from the application.
3. Set as Primary Screen – Sets the selected screen as the default screen displayed by the application at boot-up.
4. Make Screen Active – This selected screen is displayed in the Screen Designer panel. You can also select the active screen by clicking on the
screen’s tab at the bottom of the Screen Designer panel.
5. Move Screen Up in Order – Moves the selected screen up in the list of screens, which is useful in organizing a large list of screens, but has no
other significance.
6. Move Screen Down in Order – Moves the selected screen down in the list of screens.
Useful in organizing a large list of screens, but has no other significance.
Window Columns
The Generate check box is used in selecting those screens that will be included in the application when MPLAB Harmony Configurator (MHC)
generates/regenerates the application. (This, along with the Enabled check box for languages, allows customization of the application’s build to
support different end uses from the same project.) The Visible check box can be cleared to hide a screen from the sub-tabs located at the bottom
of the Screen Designer. The View column provides a mouse-over preview of the screen.
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Schemes Panel
Application color schemes are managed using the Schemes Panel.
Description
Color schemes for the application’s graphics are managed using the Schemes sub-tab.
Editing a Scheme
To edit an existing scheme, select the scheme from the list and click Edit.
The Scheme Editor dialog appears, which allows you to change the colors associated with this display scheme.
Scheme Editor
The Scheme Editor window supports editing the individual colors of a color scheme. Clicking the ellipsis ( … ) opens the Color Picker window.
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Color Picker
The Color Picker window allows the user to easily select a color by providing a color wheel, brightness gauge, and some common predefined color
choices. The user can change the individual color values or input a number in Hexadecimal format. The end result is displayed in the top right
corner.
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Options
Provides information on the defeatured Options window.
Description
In v2.03b, MPLAB Harmony Graphics Composer user interface provided a third window along with Screens and Schemes, named Options.
Beginning with v2.04b of MPLAB Harmony, these options are now located within the File > Settings menu (see Menus for details).
Widget Tool Box Panel
The Widget Tool Box panel is the interface by which users add widgets into the screen representation.
Description
All the available graphics widgets are shown in the Widget Tool Box:
MPLAB Harmony Graphics Composer provides automatic code optimization by keeping track of the widgets that are currently being used. When
MHC generates or regenerates the application, only the Graphics Library code necessary for your design is included in the project.
There are two primary methods for creating new widget objects: clicking and dragging. To add a new layer to a screen use the Screens sub-tab.
Click Method
The following actions can be performed by using the Click method:
• Clicking an item selects it as active. Users can then move the cursor into the screen window and view a representation of the object about to be
added.
• Left-clicking confirms the placement of the new object
• Right-clicking aborts object creation
• Clicking the active item again deactivates it
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Drag Method
Dragging and dropping a tool item into the Screen Designer Window creates a new instance of an object. When dragging a tool item, releasing the
cursor outside of the Screen Designer Window cancels the drag operation.
Widget List
The Graphics Composer Tool Box is the interface by which users add widgets into the screen representation.
Widget Example Application
Arc aria_showcase_reloaded
Bar Graph aria_showcase_reloaded
Button aria_adventure and many others, including aria_quickstart
Check Box aria_showcase_reloaded, aria_video_player
Circle None
Circular Gauge aria_showcase_reloaded, aria_oven_controller
Circular Slider aria_showcase_reloaded
Draw Surface None
Gradient aria_showcase (background)
Group Box aria_video_player
Image aria_quickstart
Image Plus aria_oven_controller
Image Sequence aria_showcase, aria_basic_motion
Key Pad aria_showcase, aria_touchadc_calibrate
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Label aria_quickstart
Line aria_video_player, ./aps/examples/3rd_party_display
Line Graph aria_showcase_reloaded
List Wheel aria_showcase
List aria_video_player
Panel aria_video_player
Pie Chart aria_showcase_reloaded
Progress Bar aria_flash
Radial Menu aria_radial_menu, aria_showcase_reloaded
Radio Button aria_showcase
Rectangle aria_benchmark
Scroll Bar None
Slider aria_video_player
Text Field aria_showcase
Touch Test aria_showcase, aria_touchadc_calibrate, ./apps/examples/3rd_party_display
Window None
Click Method
The following actions can be performed by using the Click method:
• Clicking an item selects it as active. Users can then move the cursor into the screen window and view a representation of the object about to be
added.
• Left-clicking confirms the placement of the new object
• Right-clicking aborts object creation
• Clicking the active item again deactivates it.
Drag Method
Dragging and dropping a tool item into the Screen Designer Window creates a new instance of an object. When dragging a tool item, releasing the
cursor outside of the Screen Designer Window cancels the drag operation.
Automatic Code Optimization
MPLAB Harmony Graphics Composer keeps track of the types of widgets that are used and updates the MHC Tree constantly to ensure that only
the Graphics Library code necessary for your design is included in the project.
Widgets
Widgets can be configured by using the Properties Editor on the right side of the MHGC interface. Each widget has multiple properties to manage
their appearance as well as their functioning. Most properties related to appearance are common between widgets, though some widgets require
specific property entries.
Arc – A graphical object in the shape of an arc. The arc thickness can be set and filled.
Bar Graph – A graphing widget that shows data in categories using rectangular bars.
Button - A binary On and Off control with events generation for Press and Release state.
Check Box - A selection box with Checked and Unchecked states, and associated events.
Circle - A graphical object in the shape of a circle.
Circular Gauge – A circular widget that operates like a gauge, where the hand/needle position indicates a value.
Circular Slider – A circular widget that can change values based on external input like touch. The slider is filled based on the value of the widget
relative to the maximum value.
Draw Surface - A container with a callback from its paint loop. a draw surface lets the application have a chance to make draw calls directly to the
HAL during LibAria's paint loop.
Gradient - A draw window that can be associated with a gradient color scheme. This allows for color variation on the window.
Group Box - A container with a border and a text title. With respect to functionality, a group box is similar to a window.
Image Sequence - A special widget that allows image display on screen to be scheduled and sequenced. Select the images to be displayed, and
the order for display. A timer to trigger the transitions must be created by calling the image sequence APIs to show the next image from the timer
callback function.
Image - Allows an image to be displayed on screen. The size and shape of the widget decides the visible part of the image, as scaling is not
enabled for images at this time.
Image Plus - Allows an image to be displayed on screen. The image can be resized (aspect ratio lock is optional). The widget can be set to accept
two-finger touch input.
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Key Pad - A key entry widget that can can be designed for the number of entries divided as specified number of rows and column entries. The
widget has a key click event that can be customized.
Label - A text display widget. This does not have any input at runtime capability. A Text Field widget serves that purpose.
Line - A graphical object in the shape of a line.
Line Graph – A graphing widget that shows data in categories using points and lines.
List Wheel - Allows multiple radial selections that were usually touch-based selections and browsing.
List - Allows making lists of text and image items. The list contents, number of items, and the sequence can be managed through a List
Configuration dialog box in the Properties box.
Panel - A container widget that is a simpler alternative to DrawSurface as it does not have the DrawSurface callback feature.
Pie Chart – A graphing widget that shows data entries as sectors in a circle.
Progress Bar - Displays the progress pointer for an event being monitored through the "Value Changed" event in the Properties Editor.
Radial Menu - A widget that groups any number of images into an elliptical carousel. It can configured as a touch interactive image carousel or
interface menu.
Radio Button - A set of button widgets that are selected out of the group one at a time. The group is specified by the Group property in the
Properties Editor.
Note:
The radio buttons in the same group must have the same group number specified in their properties.
Rectangle - A graphical object in the shape of a rectangle.
Scroll Bar - Intended to be used with another relevant widget such as the List Wheel to scroll up and down. It has a callback each time the value
is changed. The callback allows users to trigger actions to be handled on the scroll value change event.
Slider - Can change values with an external input such as touch. Event callbacks on value change are also available through the Properties Editor.
Text Field - Text input can be accepted into the text field from an external input or from a widget such as keypad. Event 'Text Changed' in the
Properties Editor is used for accepting the input.
Touch Test - Allows tracking of touch inputs. Each new touch input is added to the list of displayed touch coordinates. The input is accepted
through the 'Point Added' event callback in the Properties Editor.
Window - A container widget similar to the Panel but has the customizable title bar.
Properties Editor Panel
The properties for all layers and widgets are managed using this panel.
Description
The Properties Editor displays options for the currently-selected object (layer or widget), or the options for the active screen if no objects are
selected. To edit an option: left-click the value in the right column and then change the value. Some values have an ellipsis that will provide
additional options. In the previous case, the ellipsis button will display the Color Picker dialog.
Some properties, like the screen width and height, are locked and cannot be edited. Other properties offer check boxes and combo-type
drop-down box choices. Some properties are grouped together like the Position and Size entries. Individual values of the group can be edited by
expanding the group using the plus symbol. For example, the following figure shows properties for a Button Widget.
A new support feature is the ? icon to the right of the Scheme pull-down, which brings up an “Scheme Helper” for the widget showing how it is
colored when using a Bevel border. For a more complete description of widget coloring, see Widget Colors.
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Object Properties
Provides information on widget, layer, and screen properties.
Description
Object Properties and Event Actions
Each widget has a structured tree of properties, visible under the MPLAB Harmony Configurator window on the right of the standard window setup
within MPLAB X IDE. Most widget properties have a Related Event action that can be use in an event or macro to change or set a property from
the application.
Each widget has 3-4 property sets:
Editor – Controls the behavior of layers and widgets under the MPLAB Harmony Graphics Composer Suite Editor.
Property Name Type Description Related Event Actions
Locked Boolean Locks the object (widget), preventing changes by the designer.
Only affects the object (widget) in the editor.
N/A
Hidden Boolean Hides the widget and its children in the designer window. Only
affects the appearance of the widget in the editor.
N/A
Active Boolean For layers only. Sets the layer as active. Any objects (widgets)
added to the screen will be added to this layer.
N/A
Locked to Screen Size Boolean For layers only. Locks the layer size to the size of the display’s
screen.
N/A
Widget – Controls the behavior of screens, layers, and widgets on the display.
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Property Name Type Description Related Event Actions
Name String Editable name for each object. By default, widgets are named
NameWidget1, …,NameWidgetN. For example: ButtonWidget1,
ButtonWidget2, … .
N/A
Position [X,Y] Pair of
Integers
Location on the layer of the upper left corner of the widget or
the location on the display of the upper left corner of the layer.
Measured in display pixels. X is measured from left-to-right and
Y is measured from up-to-down from the upper left corner of the
parent object (typically a Layer or Panel).
Adjust Position, Set X
Position, Set Y Position
Size [X,Y] Pair of
Integers
X: Width, Y: Height of object, in display pixels. Adjust Size, Set Size, Set
Width, Set Height
Enabled Boolean Is the object enabled? Disabled objects are not built into the
display’s firmware.
Set Enabled
Visible Boolean Is the object visible by default? Object visibility can be
manipulated in firmware using laWidget_GetVisible and
laWidget_SetVisible.
Set Visible
Border Widget Border Choices are: { None | Line | Bevel }. Set Border Type
Margin Integer Four integers ([Left,Top,Right,Bottom]) defining the widget’s
margins on the display, in display pixels.
Set Margins
Scheme - Color scheme assigned to the layer or widget. Blank implies the
default color scheme.
Set Scheme
Background Type - Sets the background of the layer or widget. Choices are { None
| Fill | Cache }. In MPLAB Harmony v2.03, this type was
Boolean. Now, Off = None, On = Fill. With Fill selected, the
widget's background is one solid color. With Cache selected, a
copy (cache) of the framebuffer is created before the widget is
drawn and this cache is used to fill the background of the
widget. This supports transparent widgets in front of complex
widgets, such as JPEG images. Instead of rerendering the
JPEG image, it is just drawn from the cache.
Set Draw Background
Alpha Blending Boolean Is alpha blending enabled for this layer or widget and all of its
children? If enabled, specify the amount of alpha blending as an
8-bit integer. Zero makes the object invisible, whereas 255
makes the background invisible.
N/A
Widget Advanced – Advanced control of layers and widgets
Optimization
Sub-Property Name
Type Description Related Event Actions
Draw Once Boolean Indicates that the widget should draw once per screen Show
Event. All other attempts to invalidate or paint the widget will be
rejected.
N/A
Force Opaque Boolean Provides a hint to the renderer that the entire area for this
widget is opaque. Useful for widgets that may use something
like an opaque image to fill the entire widget rectangle despite
having fill mode set to None. This can help reduce unnecessary
drawing.
N/A
Local Redraw Boolean Provides a “hint” to the widget’s renderer that the widget is
responsible for removing old pixel data. This can avoid
unnecessary redrawing.
N/A
Important!
Use Local Redraw only if you know what you’re doing!
Widget Name (e.g., Button Check Box, Circle, etc.) – Optional properties tied to each widget. See Dedicated Widget Properties and Event
Actions.
Events – Associates widget events with event call-backs. For example, you can enable and specify a button pressed event and button release
event for the Button widget.
For each event you specify:
• Enabled/Disabled Check box – To enable or disable (default) the event.
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• Event Callback – Selected from the Event Editor Action List.
There are additional Event actions that do not correspond to any specific property:
• Set Parent – Set the parent of the object, including no parent.
Dedicated Widget Properties and Event Actions
Arc Widget
Property
Name
Type Description Related Event
Actions
Radius Integer The outside radius of the arc. Set Radius
Start Angle Integer The starting angle of the arc in degrees. Set Start Angle
Center Angle Integer The center angle of the arc in degrees. A positive angle draws the arc counter-clockwise from
the start angle. A negative angle draws clockwise.
Set Center Angle
Thickness Integer The thickness of the arc fill, measured from the radius to center. (radius – thickness)
determines the inside radius.
Set Thickness
Round Edge Boolean Draws round arc edge. Set Round Edge
Bar Graph Widget
Property Name Type Description Related Event Actions
Stacked Boolean Stacks the bars for the entries in a category Set Stacked Bars
Tick Length Integer The length, in pixels, of the ticks on each axis Set Tick Length
Fill Graph Area Boolean Fills the graph area with scheme base color Fill Graph Area
Value Axis
Configuration
• Maximum Value
• Minimum Value
• Tick Interval
• Subtick Interval
• Show Ticks
• Tick Position
• Show Tick
Labels
• Show Subticks
• Subtick Position
• Show Gridlines
• String Set
Integer
Integer
Integer
Integer
Boolean
Enum
Boolean
Boolean
Enum
Boolean
String
Asset
Configures the value (Y) axis
The maximum value of the axis
The minimum value of the axis
The intervals between major ticks
The interval between minor ticks
Show/Hide the major ticks
Position of major ticks on the value axis. Choices are: {Inside | Center | Outside}
Show/Hide the tick labels
Show/Hide the minor ticks
Position of minor ticks on the value axis. Choices are: {Inside | Center | Outside}
Show/Hide the gridlines
The string asset containing the numeric characters for the tick labels. The asset
must contain the characters for numbers 0 to 9.
Set Max Value
Set Min Value
Set Tick Interval
Set Subtick Interval
Show Value Axis Ticks
Set Value Axis Ticks
Position
Show Value Axis Labels
Show Value Axis
Subticks
Set Value Axis Subticks
Position
Show Value Axis
Gridlines
Set Labels String
Category Axis
Configuration
• Show Tick
• Show Category
Labels
• Tick Position
Boolean
Boolean
Enum
Configures the category (X) axis
Show/Hide the ticks
Show/Hide the category labels
Position of the ticks on the category axis. Choices are: {Inside | Center | Outside}
Show Category Axis
Ticks
Show Category Axis
Labels
Set Category Axis Ticks
Position
Category
Configuration Dialog
(See
Description)
The Category Configuration Dialog lets users add categories to the line graph.
The following properties can be set:
• Label – String Asset. The label to show for each category
None
Data Configuration
Dialog
(See
Description)
The Data Configuration Dialog lets users add and configure data series to the
line graph. The following properties can be set:
• Scheme – Scheme. The color scheme of the data series
• Category Values – Integer. Values in series for each category
None
Button
Property Name Type Description Related Event Actions
Toggleable Boolean Is button toggle enabled? Set Toggleable
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Pressed Boolean If Toggleable is enabled, provide default state of the button.
This can be used to see the colors of an asserted button.
Set Press State
Text String - Select widget’s text string from the Select String Dialog. Set Text
Alignment:
• Horizontal
• Vertical
- Text string alignment within the button object.
Horizontal alignment. Choices are: { Left | Center | Right }.
Vertical alignment. Choices are: { Top | Middle | Bottom }.
Set Horizontal Alignment
Set Vertical Alignment
Pressed Image - Select image used for pressed state. Default: no image. Set Pressed Image
Released Image - Select image used for pressed state. Default: no image. Set Released Image
Image Position - Position of image relative to button text. Choices are: { LeftOf |
Above | RightOf | Below | Bottom }.
Set Image Position
Pressed Offset Integer Offset of button contents when pressed. In Pixels.
The X and Y position of the button contents is offset by this
amount.
Set Pressed Offset
Check Box
Property Name Type Description Related Event Actions
Text String - Select widget’s text string from the Select String Dialog. Set Text
Alignment:
• Horizontal
• Vertical
- Text string alignment within the button object.
Horizontal alignment. Choices are: { Left | Center | Right }.
Vertical alignment. Choices are: { Top | Middle | Bottom }.
Set Horizontal Alignment
Set Vertical Alignment
Checked Boolean Default state of the check box. Set Check State
Unchecked Image - Select image used for widget’s unchecked state. Default: no
image.
Set Unchecked Image
Checked Image - Select image used for the widget’s checked state. Default: no
image.
Set Checked Image
Image Position - Position of image relative to check box text. Choices are: : {
LeftOf | Above | RightOf | Below | Bottom }.
Set Image Position
Image Margin Integer Space between image and text. In Pixels. Set Image Margin
Circle
Property Name Type Description Related Event Actions
X Integer X offset of circle’s center, from widget’s upper left hand corner,
in pixels.
N/A
Y Integer Y offset of circle’s center, from widget’s upper left hand corner,
in pixels.
N/A
Radius Integer Circle’s radius, in pixels. Set Radius
Circular Gauge Widget
Property Name Type Description Related Event Actions
Radius Integer The outside radius of circular gauge. Set Radius
Start Angle Integer The starting angle of the circular gauge in degrees. Set Start Angle
Center Angle Integer The canter angle of the circular gauge in degrees. A positive
value draws the gauge counter-clockwise. Clockwise if negative.
Set Center Angle
Start Value Integer The start value of the circular gauge. Set Start Value
End Value Integer The end value of the circular gauge. Set End Value
Value Integer The value of the circular gauge. Set Value
String Set String
Asset
The string asset containing the numeric characters for the tick
labels. The asset must contain the characters for numbers 0 to 9.
-
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Major Ticks Configuration
• Ticks Visible
• Tick Length
• Tick Value
• Tick Labels Visible
Boolean
Integer
Integer
Boolean
Configures the major ticks.
Shows/Hides the major ticks.
The length of ticks in pixels.
The interval between ticks.
Shows/Hides the major tick labels.
Show/Hide Ticks
Set Tick Length
Set Tick Value
Show/Hide Tick Labels
Hand Configuration
• Hand Visible
• Hand Radius
• Center Circle Visible
• Center Circle Radius
• Center Circle Thickness
Boolean
Integer
Integer
Integer
Integer
Configures the gauge hand/needle.
Shows/Hides the gauge hand/needle.
Sets the length of the hand in pixels
Shows/Hides the hand center circle.
Sets the radius of the center circle in pixels
Sets the thickness of the center circle in pixels.
Show/Hide Hand
Set Hand Radius/Length
Show/Hide Center Circle
Set Center Circle Radius
Set Center Circle Thickness
Advanced Configuration - Additional widget configuration options for adding minor ticks,
labels and arcs.
-
Minor Ticks Configuration
Dialog
(See
Description)
The Minor Ticks configuration lets users add minor ticks to the
widget. The following properties can be set:
• Start Value – Integer. The value where the first tick starts
• End Value – Integer. The value where the last tick ends
• Interval – Integer. The interval between ticks
• Radius – The radius in pixels where the ticks will be drawn
from
• Length – The length of the ticks in pixels, drawn from the
radius towards the center
• Scheme – The color scheme for the ticks
None
Minor Tick Labels
Configuration Dialog
(See
Description)
The Minor Ticks configuration lets users add minor tick labels to
the widget. The following properties can be set:
• Start Value – Integer. The value where the first tick label is
drawn
• End Value – Integer. The value where the last tick ends
• Interval – Integer. The interval between ticks
• Radius – Integer. The radius, in pixels, where the tick labels
will be drawn from
• Position – Enum, choices are {Outside | Inside}. Position of
the label relative to the radius
• Scheme – The color scheme for the ticks
None
Arcs Configuration Dialog (See
Description)
The Arcs configuration lets users draw arcs in the gauge widget.
The arcs can be used to colorize regions or range of values in the
gauge. The following properties can be set for each arc:
• Type – Enum, choices are {VALUE | ANGLE}. A value type
arc is drawn relative to the values in the gauge. An angle
type arc is draw based on the angles and is not affected by
the values in the gauge.
• Start – Integer. The start value or angle of the arc
• End – Integer. The start value or angle of the arc
• Thickness – Integer. The thickness of the arc in pixels, filled
inward from the radius towards the center
• Radius – Integer. The radius of the arc in pixels
• Scheme. The color scheme of the arc
None
Circular Slider Widget
Property Name Type Description Related Event Actions
Radius Integer The outside radius of circular slider. Set Radius
Start Angle Integer The start angle of the circular slider, in degrees. Set Start Angle
Start value Integer The start value of the circular slider. Set Start Value
End Value Integer The end value of the circular slider. Set End Value
Value Integer The value of the circular slider. Set Value
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Border Circle Configuration
• Show Outside Circle
• Outside Circle Thickness
• Show Inside Circle
• Inner Circle Thickness
Boolean
Integer
Boolean
Integer
Configures the border circle.
Shows/Hides the outside circle border.
The thickness of the outside circle border in pixels.
Shows/Hides the inside circle border.
The thickness of the inside circle border in pixels.
Show/Hide Outside Border
Set Outside Border
Thickness
Show/Hide Inside Border
Set Inside Border Thickness
Active Area Configuration
• Fill Active Slider Area
• Round Edges
• Active Slider Area
Thickness
• Inner Circle Thickness
Boolean
Boolean
Integer
Integer
Configures the slider active area.
Fills the active slider area.
Draws a round edge for the active area.
The thickness of the slider active area in pixels.
The thickness of the inside circle border in pixels.
Show/Hide Active Arc Area
Set Round Edges
Set Active Arc Area
Thickness
Show/Hide Inactive Arc Area
Button Configuration
• Show Circular Button
• Sticky Button
• Touch on Button Only
• Circular Button Radius
• Circular Button Thickness
Boolean
Boolean
Boolean
Integer
Integer
Configures the slider button.
Shows/Hides the circular slider button.
If set, the button sticks when it reaches the start/end values.
If set, the widget responds to touches within the button area only.
The radius of the circular button in pixels.
The thickness of the of the circular button border in pixels.
Show/Hide Circular Button
Set Sticky Button
None
Set Circular Button Radius
Set Circular Button
Thickness
Draw Surface – No additional properties.
Gradient
Property Name Type Description Related Event Actions
Direction - Gradient draw direction. Choices are: { Right | Down | Left | Up }. Set Direction
Group Box
Property Name Type Description Related Event Actions
Text String - Select widget’s text string from the Select String Dialog. Set Text
Alignment - Text string alignment within the widget. Choices are: {
Left|Center|Right }.
Set Alignment
Image Sequence
Property Name Type Description Related Event Actions
Sequence Configuration
Dialog
- Specify image sequence by using the Image Sequence
Configuration Dialog window.
Set Entry Image, Set Entry
Horizontal Alignment, Set
Entry Vertical Alignment,
Set Entry Duration, Set
Image Count
Starting Image Integer Selects the first image to be shown. Set Active Image
Play By Default Boolean Will image sequence play automatically? N/A
Repeat Boolean Should the image sequence repeat? Set Repeat
Additional related event
actions: , Show Next, Start
Playing, Stop Playing.
Image Widget
Property Name Type Description Related Event Actions
Image - Select image used. Set Image
Alignment:
• Horizontal
• Vertical
- Image alignment within the image object.
Horizontal alignment. Choices are: { Left | Center | Right }.
Vertical alignment. Choices are: { Top | Middle | Bottom }.
Set Horizontal Alignment
Set Vertical Alignment
Image Plus Widget
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Property
Name
Type Description Related Event Actions
Image - Select Image used Set Image
Resize To Fit Boolean Resize the image to fill the size of the widget area Toggles option to best fit the image to the widget area
Interactive Boolean Makes the widget interactive, allowing the image to be
translated, stretched and zoomed
Toggles option to permit two-finger gestures to interact
with the widget
Key Pad
Property Name Type Description Related Event Actions
Row Count Integer Number of key pad rows. None.
Column Count Integer Number of key pad columns. None.
Key Pad Configuration
Dialog
(see Description) The Key Pad dialog window has the following:
• Width – Integer. Width of each key, in pixels.
• Height – Integer. Height of each key, in pixels.
• Rows – Integer. Number of key rows. A duplicate of Row
Count.
• Columns – Integer. Number of key columns. A duplicate of
Column Count.
None.
None.
None.
None.
- - Selecting one of the keys on the key pad diagram displays the
Cell Properties for that key:
• Enabled – Boolean. Disabled cells (keys) are made
invisible.
• Text String – Select key’s text string from the Select String
Dialog.
• Pressed Image – Select image used for pressed state.
Default: no image.
• Released Image – Select image used for released state.
Default: no image.
• Image Position – Position of image relative to key text.
Choices are: { LeftOf | Above | RightOf | Below | Behind }.
• Image Margin – Integer. Space between image and text. In
Pixels.
• Draw Background – Boolean. Controls whether the key
should fill its background rectangle.
• Editor Action – Select the generic editor action that fires
when the key is clicked. Choices are: { None | Accept |
Append |
• Editor Value String
Other Key Event Actions:
Set Key Enabled
Set Key Text
Set Key Pressed Image
Set Key Released Image
Set Key Image position
Set Key Image Margin
None.
Set Key Action
Set Key Value
Set Key Background Type
Label
Property Name Type Description Related Event Actions
Text String - Select widget’s text string from the Select String Dialog. Set Text
Alignment:
• Horizontal
• Vertical
- Text string alignment within the widget.
Horizontal alignment. Choices are: { Left | Center | Right }.
Vertical alignment. Choices are: { Top | Middle | Bottom }.
Set Horizontal Alignment
Set Vertical Alignment
Line
Property Name Type Description Related Event Actions
Start X Integer X start of line, in pixels, from upper left hand corner of the
widget.
Set Start Point Position
Start Y Integer Y start of line, in pixels, from upper left hand corner of the
widget.
Set Start Point Position
End X Integer X end of line, in pixels, from upper left hand corner of the widget. Set End Point Position.
End Y Integer Y end of line, in pixels, from upper left hand corner of the widget. Set End Point Position.
Line Graph Widget
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Property Name Type Description Related Event
Actions
Stacked Boolean Stacks the values of the entries in a category Set Stacked Points
Tick Length Integer The length of the ticks on each axis Set Tick Length
Fill Graph Area Boolean Fills the graph area with scheme base color Fill Graph Area
Fill Series Area Boolean Fills the series area with series scheme base color Fill Series Area
Value Axis
Configuration
• Maximum
Value
• Minimum
Value
• Tick Interval
• Subtick Interval
• Show Ticks
• Tick Position
• Show Tick
Labels
• Show Subticks
• Subtick
Position
• Show Gridlines
• String Set
Integer
Integer
Integer
Integer
Boolean
Enum
Boolean
Boolean
Enum
Boolean
String
Asset
Configures the value (Y) axis
The maximum value of the axis.
The minimum value of the axis.
The intervals between major ticks.
The interval between minor ticks.
Show/Hide the major ticks.
Position of major ticks on the value axis. Choices are: {Inside | Center | Outside}.
Show/Hide the tick labels.
Show/Hide the minor ticks.
Position of minor ticks on the value axis. Choices are: {Inside | Center | Outside}.
Show/Hide the gridlines.
The string asset containing the numeric characters for the tick labels. The asset must
contain the characters for numbers 0 to 9.
Set Max Value
Set Min Value
Set Tick Interval
Set Subtick Interval
Show Value Axis
Ticks
Set Value Axis Ticks
Position
Show Value Axis
Labels
Show Value Axis
Subticks
Set Value Axis
Subticks Position
Show Value Axis
Gridlines
Set Labels String
Category Axis
Configuration
• Show Tick
• Show
Category
Labels
• Tick Position
Boolean
Boolean
Enum
Configures the category (X) axis
Show/Hide the ticks
Show/Hide the category labels
Position of the ticks on the category axis. Choices are: {Inside | Center | Outside}
Show Category Axis
Ticks
Show Category Axis
Labels
Set Category Axis
Ticks Position
Category
Configuration
Dialog
(See
Description)
The Category Configuration Dialog lets users add categories to the line graph. The
following properties can be set:
• Label – String Asset. The label to show for each category
None
Data Configuration
Dialog
(See
Description)
The Data Configuration Dialog lets users add and configure data series to the line
graph. The following properties can be set:
• Scheme – Scheme. The color scheme of the data series
• Point Type – Enum. The point indicator to use for the series. Choices are: {None |
Circle | Square}
• Fill Points – Boolean. Fills the points with series scheme foreground color
• Draw Lines – Boolean. Draws lines between points in the series using series
scheme foreground color
• Category Values – Integer. Values in series for each category
None
List
Property Name Type Description Related Event Actions
Selection Mode - Select list selection mode. Choices are:
{Single|Multiple|Contiguous}.
Set Selection Mode
Allow Empty Selection Boolean Is a list selection allowed to be empty? Set Allow Empty Selection
Alignment - Horizontal text alignment. Choices are: { Left | Center | Right }. Set Item Alignment
Icon Position - Position of list icons relative to list text. Choices are: { LeftOf |
RightOf }.
Set Icon Position
Icon Margin - Space between icon and text, in pixels. Set Icon Margin
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List Configuration Dialog - Defines the string and icon image for each entry in the list. Set Item Icon, Set Item
Icon (actually sets item
text).
Additional Related Event
Actions: Deselect All
Items, Insert Item, Remove
All Items, Remove Item,
Select All Items, Set Item
Selected, Toggle Item
Select(ed).
List Wheel
Property Name Type Description Related Event Actions
Alignment - Sets horizontal text alignment. Choices are: { Left | Center |
Right }.
Set Item Alignment
Icon Position - Position of icons relative to text. Choices are: { LeftOf | RightOf
}.
Set Icon Position
Icon Margin Integer Sets the space between icon and text. In pixels. Set Icon Margin
Selected Index Integer Selects the default list item. Set Selected Index
List Configuration Dialog - Defines the image/text for each entry in the list. Set Item Icon, Set Item
Icon (actually sets item
text)
Additional Related Event
Actions: Append Item,
Insert Item, Remove All
Items, Remove Item,
Select Next Item, Select
Previous Item.
Panel – No additional properties.
Pie Chart Widget
Property
Name
Type Description Related Event
Actions
Start Angle Integer The starting angle of the pie chart in degrees. Set Start Angle
Center Angle Integer The center angle of the pie chart in degrees. A positive value draws the chart counter-clockwise.
Clockwise if negative.
Set Center
Angle
Labels Visible Boolean Shows/Hides the labels for each data Show/Hide
Labels
Labels Offset Integer The position of the labels relative to the center of the pie chart, in pixels. Set Label Offset
String Set String
Asset
The string asset containing the numeric characters for the tick labels. The asset must contain the
characters for numbers 0 to 9.
Set Label
String ID
Data
Configuration
Dialog
(See
Description)
The Data Configuration Dialog lets users add data entries to the pie chart. The following
properties can be set:
• Value – Integer. The value of the entry
• Radius – Integer. The radius, in pixels, of the pie for the entry
• Offset – Integer. The offset, in pixels, of the pie from the center
• Scheme – The color scheme for the ticks
None
Progress Bar
Property Name Type Description Related Event Actions
Direction - Direction of progress bar. Choices are: { Right | Down | Left | Up
}.
Set Direction
Value - Default value of the progress bar. The primitives
laProgressBarWidget_GetValue and
laProgressBarWidget_GetValue can be used to
manipulate the widget’s value during run time.
Set Value
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Radial Menu Widget
Property
Name
Type Description Related Event actions
Ellipse Visible Boolean Show the elliptical track of the widget Elliptical track gets
draw in Harmony
Composer simulation
and at runtime.
Highlight
Prominent
Boolean Highlights the prominent item when the widget rotation has completed its reset to the
static, selectable position by drawing a rectangle behind the prominent item.
-
Ellipse Type Enum Selects the type of elliptical track
Default – an elliptical track that best fits the widget area based on the size of the tallest
and widest images with the size scale settings factored-in.
Orbital – a “flatter” elliptical track that is best used with the Theta setting for a tilted look
Rolodex – a vertical track with Theta setting locked at 90 degrees
Locks Theta to 90
degrees when Rolodex
is selected
Theta Integer The angle (in degrees) of tilt relative to the y-axis of the ellipse. The number range is 0
to 90 degrees.
This field is only valid
for Default and Orbital
Ellipse Type setting. It
is locked at 90 when
Rolodex is selected.
a Integer This is the half-length (in pixels) of the 0-180 axis of ellipse. It is auto-calculated based
on the widget size, the tallest image’s height, the ellipse type and scale settings.
-
b Integer This is the half-length (in pixels) of the 90-270 axis of ellipse. It is auto-calculated based
on the widget size, the widest image’s width, the ellipse type and scale settings.
-
Size Scale
Configuration
• Size Scale
* Minimum
Size Modifier
* Maximum
Size Modifier
Enum
Integer
Integer
Off – all images displays at its original size
Gradual – images in the very back are scale to the Minimum Size Modifier setting, the
scale is gradually increased, with the prominent front item scaled to the Maximum Size
Modifier setting
Prominent – the image that is at the front, prominent location is scaled based on the
Maximum Size Modifier, all other images are scaled to the Minimum Size Modifier
setting
The value (in percent) for the widget to resize the image to. When Size Scale is set to
Gradual, this value represents the lowest scale for the item in the back. When Size
Scale is set to Prominent, this value represents the scaling value for every image in the
widget except for the prominent item. This value is equal to or less than the Maximum
Size Modifier value
The value (in percent) for the widget to resize the image to. When Size Scale is set to
Gradual, this value represents the largest scale for the item in the front (prominent
position). When Size Scale is set to Prominent, this value represents the scaling value
for the prominent item. This value is equal to or greater than the Minimum Size Modifier
value
-
-
-
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Item List
Configuration
• Total
Number of
Items
Shown
* Total
Number of
Widget Items
* Widget
Items
Configuration
Dialog
Integer
Integer
(See
Description)
The number images visible on the radial menu. This number does not may be less than
or equal to the total images in the widget.
The total number of images the widget contains.
The Widget Items Configuration Dialog lets users add images to the widget. The follow
properties can be set:
• Image – Image Asset. The image to show for the widget item
The widget
automatically
space-out the images
along the elliptical track
base on this value.
If this number is
greater than Total
Number of Items
Shown, some of the
images will be hidden
in a FIFO queue in the
back
-
Touch Area
Configuration
• Show
Touch
Area
* Touch Area
X Offset
* Touch Area
Y Offset
* Touch Area
Width
Percent
* Touch Area
Height
Percent
Boolean
Integer
Integer
Integer
Integer
Show visually in Harmony Graphics composer the rectangular area that permits touch
interaction.
The X-coordinate in local space of the touch-allowed area for the widget. This is
auto-calculated based on the Touch Area Width Percent.
The Y-coordinate in local space of the touch-allowed area for the widget. This is
auto-calculated based on the Touch Area Height Percent.
The percentage of the width of the touch-allowed area as compared to the entire widget
area.
The percentage of the height of the touch-allowed area as compared to the entire
widget area. The default value is 50.
This setting is for
preview in Harmony
Graphics composer
only. The touch area is
not rendered at runtime.
-
-
If this value is less than
100 percent, the area
is horizontally centered.
If this value is less than
100 percent, the area
is defined starting from
the bottom of the
widget.
Radio Button
Property Name Type Description Related Event Actions
Text String - Select widget’s text string from the Select String Dialog. Set Text
Alignment:
• Horizontal
• Vertical
- Text string alignment within the widget.
Horizontal alignment. Choices are: { Left | Center | Right }.
Vertical alignment. Choices are: { Top | Middle | Bottom }.
Set Horizontal Alignment
Set Vertical Alignment
Group Integer Radio Button Group Number. Default is -1, indicating no group.
Only one radio button in a group can have a default selected
value of On. All others in the group are Off
N/A
Selected Boolean If selected, the button has a default value of On. All other
buttons in the group have a Selected value of Off.
Select
Selected Image - Select image used for selected state. Default: no image. Set Selected Image
Unselected Image - Select image used for unselected state. Default: no image. Set Unselected Image
Image Position - Position of image relative to widget text. Choices are: { LeftOf |
Above | RightOf | Below | Behind }.
Set Image Position
Image Margin - Space between radio button image and text, in pixels. Set Image Margin
Circle Button Size - The diameter of the default circle button, in pixels Set Circle Button Size
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Rectangle
Property Name Type Description Related Event Actions
Thickness Integer Line thickness in pixels. Set Thickness
Scroll Bar
Property Name Type Description Related Event Actions
Orientation - Scroll bar orientation. Choices are: { Vertical | Horizontal }. Set Orientation
Maximum Integer Maximum scroll value (minimum = 0.) Set Maximum Value
Extent Integer Length of scroll bar slider, re scroll bar maximum value.
Indicates the number of lines or size of window visible at each
scroll setting.
Set Extent
Value Integer Initial scroll bar value. Set Value, Set Value
Percentage
Step Size Integer Step size value of scroll bar arrow buttons. ( Min = 1, Max =
9999 ).
Set Step Size
Additional Related Event
Actions: Step Backward,
Step Forward
Slider
Property Name Type Description Related Event Actions
Orientation - Orientation of the slider. Choices are: { Vertical | Horizontal }. Set Orientation
Minimum - Minimum slider value. Set Minimum Value
Maximum - Maximum slider value. Set Maximum Value
Value - Initial slider value. Set Value, Set Value
Percentage
Grip Size - Grip size of slider, from 10 to 9999, in pixels. Set Grip Size
Additional Related Event
Actions: Step
Text Field
Property Name Type Description Related Event Actions
Text String - Select widget’s text string from the Select String Dialog. Clear Text followed by
Append Text
Alignment - Horizontal alignment. Choices are: { Left | Center | Right }. Set Alignment
Cursor Enable - Boolean. Show blinking cursor while editing. Set Cursor Enabled
Cursor Delay - Cursor delay in milliseconds. From 1 to 999,999. Set Cursor Delay
Additional Related Event
Actions: Accept Text,
Append Text, Backspace,
Clear Text, Start Editing.
Touch Test – No dedicated properties.
Window
Property Name Type Description Related Event Actions
Title String - Select widget’s title string from the Select String Dialog. Set Title
Icon Image - Select image used. Default: no image. Set Icon
Image Margin Integer Space between icon and title, in pixels. N/A
Layer Properties and Event Actions
The property list for a graphic layer is close in look and feel to that of a widget. Each Layer has three property sets: Editor (see above), Widget
(see above), and Layer (see below).
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Layer Properties
Property Name Type Description Related Event Actions
Transparency Enabled Boolean Automatically mask out pixels of with a specified color.
If enabled Specify:
N/A
Mask Color Integer Red/Green/Blue or Red/Green/Blue/Alpha color value N/A
All Input Passthrough Boolean Allow input events to pass through this layer to layers behind it. N/A
VSync Enabled Boolean Layers should swap only during vertical syncs. N/A
Buffer Count Integer Integer number of frame buffers associated with this layer,
either 1 or 2.
N/A
Buffer N - For each buffer (N= 1 or 2) you specify: -
Allocation Method - Buffer allocation method.
Choices are: { Auto | Address | Variable Name }
• Auto – Automatically allocate frame buffer space
• Address – Specify a memory address
• Variable Name – Use variable name as buffer location
N/A
Memory Address - If Address is the allocation method, specify the raw (physical)
memory address as a hexadecimal number.
N/A
Variable Name String If Variable name is the allocation method,
specify the variable name as a string value.
N/A
Screen Properties and Events
The property list for a screen shares the Name and Size properties with Layers and Widgets but has these unique properties.
Screen Properties
Property Name Type Description Related Event Actions
Orientation - Display orientation: 0, 90, 180, 270 Degrees.
This can also be set using the Display Manager.
N/A
Mirrored Boolean Enables screen mirroring. N/A
Layer Swap Sync Boolean Enables that all layer buffer swapping happen at the same time,
delaying lower layers until higher layers are finished drawing as
well. For example, assume you make changes to layer 0 and
layer 1 and you want to see those changes show up on the
screen at the same time. Without this option you’d see layer 0’s
changes as soon as it finishes when layer 1 has not yet started
drawing. This option will hold layer 0’s swap operation until
layer 1 finishes as well.
Note: Currently, this property is only supported by the
CLCD Graphics Controller Driver and is ignored by all other
drivers.
N/A
Persistent Boolean Indicates that the screen should not free its widgets and
memory when it is hidden. This results in faster load times and
persistent data, but at the cost of higher memory consumption.
N/A
Export Boolean Includes this screen the application build.
This can also be set using the Screens panel.
N/A
Primary Boolean Sets this screen as the primary screen. The primary screen is
the first screen displayed when the application starts. This can
also be done using the Screens Panel Generate check box.
N/A
Graphics Composer Asset Management
The Asset menu supports managing all graphical assets (memory, images, languages, fonts, strings, and binary data).
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Memory Configuration
Provides information on configuring memory locations.
Description
The Memory Locations window is launched from the Graphics Composer’s Asset menu. Selecting Memory Locations this brings up a window with
three sub-tabs (in this example, the Aria Showcase demonstration is referenced):
Window Toolbar
The window’s tools icons support:
1. Add New Memory Location – This supports multiple external memory resources.
2. Delete Selected Memory Location – Removes a previously defined memory location.
3. Rename Selected Memory Location – Renames a previously defined memory location.
4. Configure External Media Application Callback – This allow definition of media callbacks, which must be provided in the project.
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5. Show Values as Percent – Memory utilization on the bar graph can be in bytes or as a percent of the total internal flash memory assigned to
support asset storage. (That memory allocation is set using the Configuration sub-tab.)
The APIs for the external media callback functions are as follows:
GFX_Result app_externalMediaOpen(GFXU_AssetHeader* asset);
GFX_Result app_externalMediaRead(GFXU_ExternalAssetReader* reader,
GFXU_AssetHeader* asset,
void* address,
uint32_t readSize,
uint8_t* destBuffer,
GFXU_MediaReadRequestCallback_FnPtr cb);
void app_externalMediaClose(GFXU_AssetHeader* asset);
The graphics demonstration project, aria_external_resources, provides an example of how to write these callbacks. This demonstration supports
three types of external memory: SQI External Memory, USB Binary, and USB with File System. Examples of these callbacks are found in the
project’s app.c file. The Aria demonstration projects Aria External Resources and Aria Flash provide more details on how to use external memory
to store graphics assets.
Sub-tabs
There are three sub-tabs to this window.
Summary Sub-tab
This sub-tab summarizes program flash allocations for images, strings, and fonts.
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The memory allocation shown for “Font Glyphs” measure the space that holds all the font glyphs used by the application, either by static strings or
by glyph ranges defined in support of dynamic strings. Strings are defined by arrays of pointers to glyphs, so string memory usage measures the
size of these arrays, not the actual font glyphs used. (“Glyph” is defined here.)
Note:
The word “glyph” comes from the Greek for “carving”, as seen in the word hieroglyph – Greek for “sacred writing”. In modern
usage, a glyph is an elemental or atomic symbol representing a readable character for purposes of communicating through writing.
Configuration Sub-tab
This sub-tab specifies the intended allocation of internal (program) flash memory to graphics assets (Total Size). (The default value is 1024 bytes.)
It also names the graphics assets file name (here it will be gfx_assets.c). The allocation of flash is only used to scale the Total/Used/Available
bar graph at the top of the display. Under sizing or oversizing this amount does not affect how the application is built.
If your device has 1024 Kbytes (1048576 bytes) of flash, you can assign 40% to asset storage and 60% to code. In that case the “Total Size” in the
above sub-tab would be set to 419430 (= 40% of 1048576).
The Calculator button can assist you in allocating internal flash. Click on it and then set the device flash capacity. Then you can apply an
adjustment to that value to assign that memory to asset storage.
Example:
If the device has 2 Mbytes of internal Flash, click 2MB.
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Then, to assign 75% of the 2 Mbytes to asset storage, click -25% to reduce the 2 MB by 25%, leaving 75%, and then click OK to finish. This will
then assign 1,536,000 bytes to asset storage.
Internal (program) Flash is shared between the application’s code and asset storage. If the application code and graphics assets (fonts, strings,
images) won’t fit into the available flash memory then the linker will be unable to build the application and an error will be generated in MPLAB X
IDE.
The Output File Name must be compatible with the operating system hosting MPLAB X IDE. In most cases the default name (gfx_asset.c) will
suffice, but this is provided for additional flexibility in building the application.
Optimization Sub-tab
The Optimization sub-tab for the Aria Quickstart demonstration is shown in the following figure.
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The Size column shows the bytes allocated for storage in internal flash for the images, fonts, and binaries of the application.
The References column shows the number of known references for these assets by the application’s widgets. A references count of zero
suggests that the asset is not used by the application, but it could also mean that the asset is only used in real-time when it is dynamically
assigned to a widget by the application. Clicking the title of a column (Name, Size, or References) sorts the lists of graphics assets by that column.
Clicking the same column again reverses the sort order.
The window’s tools icons support:
1. Edit Selected Asset – This brings up the edit dialog for the image, font, or binary chosen
2. Delete Selected Assets – Removes the selected assets
3. Move Selected Assets – Move assets from one location to another. This is useful for moving assets to/from internal memory from/to external
memory.
4. Show Only Images – Show image assets toggle on/off
5. Show Only Fonts – Show font assets toggle on/off
6. Show Only Binaries – Show binary assets toggle on/off
DDR Organizer
The DDR Organizer tool supports managing buffers, raw images, and other memory resources in the DDR memory of DA devices and only
DDR-enabled DA devices. This tool also requires that the DA’s built-in 2D graphics processor be enabled. Under Harmony Framework
Configuration > Graphics Stack > Graphics Processor, select the NANO 2D processor:
The DDR Organizer tool is launched from the Assets Management pull-down menu:
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The following window will appear if the tool has not been used before for the active project target configuration:
Select the memory profile that corresponds to the target DDR-enabled DA device:
Then select the Load Button to load that memory configuration into the tool.
When Preprocessing is enabled for an image under the Image Assets tool:
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An entry for the image appears in the DDR Organizer window:
When the memory profile is loaded, the tool automatically reserves DDR memory for the GLCD Frame Buffers sufficient for three double-buffered
layers, allocating 32 bits (4 bytes) for RGBA_8888 format for each pixel. This provides 384,000 pixels (800x480) per frame buffer.
The tool icons support adding non-image memory allocations to the DDR memory map. To add or remove the memory allocation belonging to an
image, the Preprocessing enabled property for that image is enabled/disabled using the Image Asset tool.
Image Assets
Provides information on the Image Assets features.
Description
The Image Assets window is launched from the Graphics Composer’s Asset menu.
The Image Assets window lets you import images, select different image formats/color modes for each image, select compression methods (for
example, RLE) for each image, and displays the memory footprint of each. Images can be imported as a BMP, GIF, JPEG, and PNG (but not
TIFF). Images can be stored as Raw (BMP, GIF), JPEG, and PNG.
Note:
MHGC does not support image motion that can be found in GIF (.gif) files. GIF images are stored in the raw image format,
meaning that there is no image header information stored with the image.
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When an image is imported into MGHC, the Graphics Asset Converter (GAC) stores the input format and color mode along with any relevant
header data. The image’s pixel data is then promoted from its native format into a Java Image using 32 bits/pixel (8 bits for each color, RGB, and 8
bits for Alpha Blending). If the image contains Alpha Blending then this information is stored in the “A” of RGBA, otherwise the “A” is set to
maximum opacity. When the application is built each image is stored in the image format and color mode selected. Images displayed in the Screen
Designer are converted from Java Image format into the format/color mode selected so that the Screen Designer accurately represents what the
application will show when running.
The images are decoded on the fly by the graphics library and rendered on the screen. This provides the designer with considerable flexibility to
import using one format and store resources using another format, thus exploring and maximizing the best memory utilization for their application
and hardware. This supports trading a smaller memory footprint at the cost of additional processing (for static or drawn-once) or reducing
processing at the cost of a larger memory footprint (dynamic or drawn many times).
The following figure shows the Image Assets window for the Aria Quickstart demonstration.
Window Toolbar
There are five icons on the toolbar below the Images tab:
1. Add Image Asset – Brings up “Import Image File” dialog window to select image file to add to the graphics application.
2. Replace Existing Image with New Image File – Brings up the same “Import Image File” dialog but instead of creating a new image, the file’s
content replaces the currently selected image.
3. Rename Selected Image – Renames the selected image.
4. Create New Virtual Folder – Creates a new virtual folder, allowing you to organize images in a hierarchy.
5. Delete Selected Images – removes the selected images from the application.
Selecting the Add Image Asset or Replace Existing Image icon opens the Import Image File dialog that can be used to select and import an image.
After selecting the file and clicking Open, the Image Assets window opens.
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The size of the memory used for this image based on its color mode, format, compression, and global palette usage is shown by Size (bytes). See
Image Format Options below for more details.
The File Name of the original source file is also shown, but may be blank if the image was imported under MPLAB Harmony v2.03b or earlier. The
format and color mode of the stored image can be changed to reduce the image’s memory footprint. (If using an LCC controller, you can also turn
on the Global Palette, replacing each pixel in the image with just an 8 bit LUT index.)
The three internal image formats are:
• Raw – binary bit map with no associated header information. GIF and BMP images are imported into this format.
• PNG – lossless image format with compression, 24 bits/pixel (RBG_888) or 32bits/pixel (RGBA_8888). A good choice for line drawings, text,
and icons.
• JPEG (JPG) – loss compressed format, uses much less storage than the equivalent bit map (raw). Good for photos and realistic images.
New to Harmony 2.06 is the option to preprocess an image into raw pixels at boot-up, which will greatly improve image draw/redraw times though
the use of the high performance 2-D graphics processing unit (GPU) that is available on DDR-enabled DA devices. Be sure that this feature is
enabled in MPLAB Harmony Configurator. Under Harmony Framework Configuration > Graphics Stack > Graphics Processor, select the NANO
2D processor:
Note:
Do not enable image preprocessing except on DDR-enabled DA devices with the NANO 2D graphics processor enabled. To do so
will produce an application that builds but does not run.
With Preprocessing of the image enabled, additional options become available:
• DDR Memory allocation for the image is automatically handled when the Managed option is selected
• The Output Mode should be selected to match the GLCD’s color mode, typically RGBA_8888
• The Padding option expands the image size to the nearest power of two. For example, a 480x212 image would be increased to 512x256 pixels.
• The expected size of the preprocessed image in DDR memory is shown in the Expected Size entry
For more information on how images are stored within DDR memory, see the section on the Asset Management DDR Memory tool above.
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The Image Assets window supports resizing, cropping, or resetting an image:
• Resize – Brings up a dialog window to change the pixel dimensions of the image. The image is interpolated from the original pixel array into the
new pixel array.
• Crop – Places a cropping rectangle on the image. Click and drag a rectangle across the image to select the new image. Then click Ok to crop
the image.
• Reset – Allows undoing of a resize or crop. The original image is always stored in the project, so a Reset is always available to return the
image to its original state.
Original images are retained by MHGC by the superset Java Image format. So an image crop will change how the image is stored in the
application but not how it is stored in MHGC. Reset will always restore the image back to the original pixels. (Reset is not an “undo”.)
Example Images
Example images are available from many sites on the internet. One of the best sites is found at the USC-SIPI Image Database
(http://sipi.usc.edu/database/). There are many canonical test images, such as Lena, The Mandrill (Baboon), and other favorites, all in the TIFF
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format. The TIFF format is not supported by the Graphics Composer, but you can easily convert from TIFF to BMP, GIF, JPEG, or PNG using the
export feature found in the GNU Image Manipulation Program (GIMP), which is available for free download at: https://www.gimp.org. GIMP also
allows you to change the pixel size of these images, usually 512x512, to something that will fit on the MEB II display (either 256x256 or smaller).
The following figure shows the Graphics Composer Screen Designer for the pic32mz_da_sk_meb2 configuration of the Aria Quick Start project
after adding three images.
The following figure shows the Optimization Tab after adding these images.
Selecting the Baboon_GIF image and the Edit Selected Asset icon ( ) opens an Image Assets window, as shown in the following figure.
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Because this image had only 253 unique pixel colors (Unique Pixel Count = 253) the Enable Palette option was automatically enabled. This
feature, which works on an image by image basis, is separate from enabling a Global Palette. The image is stored using 8 bits of indexing into an
image-specific lookup table (LUT). If the image has more than 256 unique colors then the Enable Palette option is not available and is not shown.
Image Format Options
Raw Format Images
Raw format images have the following options:
Regardless of the Color Mode of the imported the image, the stored image can be stored in a different color mode. For example, a JPEG image
could be in 24 bits/pixel RGB format but stored in the application using RGB_565 or even RBG_332 to save space. The Project Color Mode (set
through the File > Settings menu) is different from the Color Mode of images. This is determined by the capabilities of the projects graphics
controller. The graphics library converts images from the stored color mode to the project’s color mode before output.
If the image has 256 or less unique pixel colors an option to Enable Palette is set by default. If the image has more than 256 unique colors this
option is not displayed. This replaces the palette pixels with 8-bit indices into the image’s palette look up table (LUT). NOTE: Enabling the Global
Palette disables this for all images and all image pixels are replaced by 8-bit indices into the global palette LUT.
The Compression Mode for a raw format image is either None (no compression) or RLE for run-length encoding.
Image masking is a form of cheap blending. For example, given the following image, you may want to show the image without having to match the
lime green background. With image masking you can specify that the lime green color as the “mask color”, causing it to be ignored when drawing
this image. The rasterizer will simply match a pixel to be drawn with the mask. If they match, the pixel is not rendered.
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PNG Format Images
For PNG format images you can change the image format and the image color mode:
JPEG Format Images
For JPEG format images you can change from JPEG format to Raw or PNG:
Once changed from JPEG into another format, the new format will have other options.
Managing Complex Designs
The Image assets tool lists the images in the order of their creation. In a future version of MPLAB Harmony this will be sortable by image name.
For now, it is recommended that you use the Memory Locations asset tool, and use the Optimization sub-tab instead to manage a complex set of
images. The Optimization sub-tab allows you to sort graphics assets (fonts, images, binaries) by Name, Size, and number of widget References.
This makes it much easier to find and edit an image by its name rather than order of creation.
Font Assets
Provides information on the Font Assets features.
Description
The Font Assets window is launched from the Graphics Composer’s Asset menu.
Note:
There are three dimensions to text support: Languages, Fonts, and Strings. Language “ID” strings are identified when an
application supports more than one language. (In the case of single language support, the language default is provided.) Fonts are
imported and organized using the Font Assets window. Strings are defined by a string name, and this name is used by widgets to
reference the string. For each string and each language supported the glyphs are defined to spell out the string’s text and the font
is chosen for that text.
• Languages are managed within the String Table Configuration window
• Fonts are managed within the Font Assets window (this topic)
• Strings are managed within the String Assets window
The following figure shows the Font Assets window from the Aria Coffee Maker demonstration.
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The Size (bytes): for a Font asset shows how much memory is needed to store all the glyphs used by the application from this font. For static
strings MHGC determines which glyphs are used by the application’s pre-defined strings and builds these glyphs into the application. For dynamic
strings (i.e. strings created during run time) ranges of glyphs are selected by the designer and these ranges are also included in the application by
MHGC. The memory needed to store all these glyphs is shown by Size (bytes): .
Window Toolbar
There are five icons on the toolbar below the Images tab:
1. Add Font From File – Adds a font asset from a file.
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2. Add Installed Font – Add a font installed on your computer.
3. Replace Existing Font Data with New Source Font – Both Add Font From File and Add Installed Font create a new font asset. This icon
allows you to update an existing font asset, importing from a file or using a font installed on your computer.
4. Rename Selected Font – Renames an existing font asset. In the example above, the Arial font was installed twice, first as a 16 point font and
second as a 12 point font. If added to the fonts assets in this order, the 12 point font will have the name Arial_1. This font asset was renamed to
Arial_Small using this tool.
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5. Delete Selected Fonts – Removes selected font assets from the application.
Sub-tabs
There are three sub-tabs to this window.
Style Sub-tab
The Size (bytes): shown represents the memory needed to store all the font’s glyphs. The application only stores the glyphs that are used by static
(build-time) strings and by predefined glyph ranges to support dynamic (run-time) strings.
The choices for Memory Location must be defined before the font can be assigned. Go to the Memory Configuration window to add a new location
before using it in this sub-tab.
Each font asset consists of a font, size, and some combination of the { Bold, Italic, Anti-Aliasing } options, including selecting none of these
options. If you need bold for one set of strings and italic for another, then you will need two font assets, one with Bold checked and a second with
Italic checked. The same applies for font sizes. Each font size requires its own font asset. Thus if you need two sizes of Arial, with plain, bold, and
italic for each size, you will need 6 separate assets (6 = 2 Sizes x 3 ).
Glyphs are normally (Anti-Aliasing off) stored as a pixel bit array, with each pixel represented by only one bit. Turning on Anti-Aliasing replaces
each pixel bit with an 8-bit gray scale, thereby increasing font storage by a factor of 8!
What if a font is chosen that does not support the character types of the text used for a particular language in the application? How can you test
and debug this? There a basically two ways:
• Use an external font viewer to examine if the needed glyphs exist
• Configure, build, and run the application and verify the strings are correctly rendered
If the glyphs are not available they will be rendered as rectangles ( ).
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Strings Sub-tab
The Bound check box accomplishes the same thing as assigning a font to a text string in the Strings Assets window (Window:Strings menu).
Assigning a string to a font means that the font will generate glyphs for that string. This is just another way to accomplish the binding of the string
text to font.
This sub-tab is also useful in a complicated graphics design to see how many strings use a particular font. Lightly-used or unused fonts can be
eliminated to free up internal Flash memory.
Glyphs Sub-tab
Note:
The word “glyph” comes from the Greek for “carving”, as seen in the word hieroglyph – Greek for “sacred writing”. In modern
usage a glyph is an elemental or atomic symbol representing a readable character for purposes of communicating via writing.
The Glyph sub-tab is only used when your application supports dynamic strings. For static (build-time) strings MHGC automatically determines
which font glyphs are used based on the characters present in all the strings used by the application’s graphics widgets. Only these glyphs are
included as part of the application’s font assets. With dynamic (i.e. run-time) strings this is not possible. This sub-tab allows you to specify which
range of glyphs will be used by run-time strings. Once glyph ranges are defined, these glyphs are added to the font glyphs used by static strings.
The Create New Custom Import Range icon ( ) allows you to input a new glyph range for the font. Selecting this icon opens the Font Assets
window.
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String Table Configuration
Provides information on the String Assets features.
Description
The String Table Configuration window is launched from the Graphics Composer’s Asset menu.
Note:
There are three dimensions to text support: Languages, Fonts, and Strings. Language “ID” strings are identified when an
application supports more than one language. (In the case of single language support, the language default is provided.) Fonts are
imported and organized using the Font Assets window. Strings are defined by a string name, and this name is used by widgets to
reference the string. For each string and each language supported the glyphs are defined to spell out the string’s text and the font
is chosen for that text.
• Languages are managed within the String Table Configuration window (this topic)
• Fonts are managed within the Font Assets window
• Strings are managed within the String Assets window
Within this window, the Languages supported by the application are defined and the encoding for all application glyphs selected.
The “ID” string used for each language is merely for ease of use in building the texts to be used. “English”, “American”, or any other string can be
used to identity that language, as long as it is understood by the application’s creator when selecting the text to be used for that particular
language. Then the application can switch to supporting one of its languages using “ID” strings defined.
Here is an example string asset definition, taken from the Aria Coffee Maker demonstration. This application supports English, French, Italian, and
German. The text string “InfoText_Desc9” uses the Arial font, and text for each language is specified within the String Assets window.
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Any number of languages can be defined as long as there is memory to store the strings needed.
The following figure shows the String Table Configuration for an application that uses English, Spanish, and Chinese.
The size of all the strings for each language is shown in the Size column. String size represents the memory allocated for glyph indices for all the
strings supporting that language. A language can be enabled/disabled via the check box in the Enabled column. Disabling a language removes it
from the application build but keeps it in the project.
Window Toolbar
There are three icons on the toolbar:
1. Add New Language – Adds a new Language.
2. Set Default Language – Sets the application’s default language. Note, this is different than the abc tool on the Graphics Composer Window
toolbar. The abc icon sets the preview language for the Screen Designer panel only. This icon sets the language used by the application after
boot-up.
3. Remove Selected Language – Removes language from the application.
Clicking Add New Language opens a new line, allowing you to select and edit the new language’s “ID” string.
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Then, for every string defined in the application there will be a line to define the needed text, and to specify the font to be used.
If you don’t provide a value for the new language the string will be output as a null (empty string). If you don’t provide a Font selection then the
string will be output as a series of blocks (?).
The Aria User Interface Library primitive, LIB_EXPORT void laContext_SetStringLanguage(uint32_t id), allows the application to
switch between languages using the Language ID #defines are specified in the application’s gfx_assets.h file.
Sub-tabs
There are two sub-tabs to this window.
Language Definitions Sub-tab
This sub-tab shows the languages defined for the application. A Language can be enabled/disabled to include or exclude it from the application’s
generation/regeneration under MPLAB Harmony Configurator (MHC). New languages can be added by specifying a text string for the language.
With a new language, go to the String Assets window to specify the text and fonts for all defined strings.
Encoding Sub-tab
Selecting the Character Encoding Format Selection Dialog icon gives you three choices for how the characters in all strings in the graphics
application are encoded:
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The default is ASCII. It is typically the most efficient in terms of memory and processing, but it does not support as many glyphs. Chinese text
should be encoded in UTF-8 or UTF-16, but Western language text can be encoded in ASCII to save memory. The trade-off between ASCII,
UTF-8, and UTF-16 depends on the application. Changing from UTF-8 to UTF-16 will double the size of all strings in the application. This is
because the sizes of all glyph indices double in size. (String sizes are the sizes of glyph reference indices, not the size of the particular font glyphs
used to write out the string.)
The memory utilization resulting from an encoding choice can be seen in the Summary sub-tab of the Memory Configuration window.
String Assets
Provides information on the String Assets features.
Description
The String Assets window is launched from the Graphics Composer’s Asset menu.
The String Assets window supports managing the strings in the application. Strings are referenced by graphic widgets using an application-wide
unique name. This unique name is built into an enumeration that the application’s C code uses. For each language supported text is defined and a
font asset selected.
Note:
There are three dimensions to text support: Languages, Fonts, and Strings. Language “ID” strings are identified when an
application supports more than one language. (In the case of single language support, the language default is provided.) Fonts are
imported and organized using the Font Assets window. Strings are defined by a string name, and this name is used by widgets to
reference the string. For each string and each language supported the glyphs are defined to spell out the string’s text and the font
is chosen for that text.
• Languages are managed within the String Table Configuration window
• Fonts are managed within the Font Assets window
• Strings are managed within the String Assets window (this topic)
The following figure shows an example taken from the Aria Coffee Maker demonstration. The string name, InfoText_Desc9, defines a string asset
that is used by the application.
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The Total Size in Byte: for a string asset represents the memory needed to store the glyph indices for all the text defined for that string asset.
Adding more text will increase the number of glyph indices needed thus increasing the size of the string’s memory. Adding another language will
do the same, since the number of glyph indices also increases. Changing the font does not increase the size of the string’s memory, but may
increase the size of the font chosen if it is a “bigger” font and adds more glyphs to the new font. (By “bigger” we mean a font with more pixels, for
example because it is bigger in size, or perhaps because it is anti-aliased and the original font was not.)
Note:
The Reference Count shown reflects the number of build-time references to the string. Dynamic uses of a string, such as through
macros or events, is not reflected in this number.
Window Toolbar
There are four icons on the toolbar:
1. Add New String – Adds a new string.
2. Rename Selected Item – Allows renaming the string.
3. Describe Selected String - Provides a Description field value for selected string.
4. Create New Virtual Folder – Creates a new virtual folder, allowing you to organize strings in a hierarchy. Here’s an example reorganization of
the existing strings. Note the order of virtual folders or items in the list is strictly alphabetical. Virtual folders and string asset organization is
merely for the convenience of the developer. Neither has an effect on how the application is built.
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5. Delete Selected Items – Deletes selected strings from the application.
6. Import String Table - Imports an Excel CSV (Comma Separated Value) file to replace the current string table.
7. Export String Table - Exports the current string table as an Excel CSV (Comma Separated Value) text file.
Creating New Strings
To create a new string, click Add New String ( ).
Selecting this icon opens the Add String dialog to name the string. The text chosen for the string name should be acceptable as a C variable.
After entering the new string’s name and click Create, the following String Assets window appears.
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In the String Assets window, there will be a line for each of the languages defined for the application. Provide the string text and font for each of
the languages. An empty string will be used if the text is not provided. Not providing a font causes the string to be rendered as a string of boxes (
).
Importing and Exporting String Tables
Importing an Excel CSV (Comma Separated Values) file replaces the existing string assets table. Exporting creates an Excel CSV file that can be
imported into another project or target configuration. Exported string tables can be manipulated in Excel, even combining multiple string tables into
a single string table that can then be imported.
If the string asset table contains UTF-8 then the file cannot be directly loaded into Excel. Instead, within Excel create a new sheet. Import the string
table using Get Data, selecting From File, From Text, or CSV. Then in the dialog window change the File Origin to Unicode (UTF-8).
Note:
Excel does not support importing UTF-16.
Binary Assets
Provides information on the Binary Assets features.
Description
The Binary Assets window is launched from the Graphics Composer’s Asset menu.
Selecting the Add Binary File icon ( opens the Import File dialog.
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This supports any formatted binary file. Developers can then add a custom-coded decoder to support the format implied by the imported file. (A
future version of the GFX library will include a bin2code utility in support of this feature.)
MHGC Tools
The Tools menu supports managing all graphics events, using a global palette, and estimating heap memory usage.
Event Manager
This section provide information on the Event Manager.
Description
The Graphics Composer Event Manager provides a GUI interface to manage all of the events associated with a graphics application. In a general
sense, an event is an action or occurrence that is processed by software using an “event handler”. Button pushes or keystrokes are widely
recognized and handled events. Events related to a touch screen are commonly called “gestures”. This GUI allows the assignment of actions to
events associated with graphics widgets and to events outside of the graphics library. Under the Graphics Composer Event Manager tab there are
two sub-tabs, one for “Events” and a second for “Macros”.
The following table summarizes the difference between "events" and "macros" and provides examples of each instance of source to destination:
Differences Between Events and Macros
Source Inside of Graphics (Destination) Outside of Graphics (Destination)
Inside of Graphics "Event"
Example: Button changes button text
"Event"
Example: Button changes MEB2 LED color
Outside of Graphics "Macro"
Example: Mounting SD card changes screen
Not supported by Event Manager Tool
“Events” under the first tab are generated from within graphics widgets and can manipulate the properties of screen widgets or set semaphores
that engage with the rest of the application. “Macros” are executed outside of graphics widgets by other parts of the application. “Macros” allow the
application to change widget properties or behavior.
Both “Events” and “Macros” event handlers can be built using collections of “Template” actions or using “Custom” developer-provided code. Most
widget properties have an associated Template action that can be used to manipulate that property in an event handler (either “Event” or “Macro”).
For more information on properties and related actions, see the discussion on the Properties Window below.
To explore these capabilities, let’s look at the Aria Quickstart project after the completion of the Adding an Event to the Aria Quickstart
Demonstration Quick Start Guide.
Graphics Composer Events
The Graphics Composer Screen Designer shows that there is one layer and three widgets in this demonstration.
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Of the three widgets shown above, only ButtonWidget1 can have events associated with it, one for button pressed and a second for button
released. This can be seen in the Graphics Composer Event Manager window, which is available from the Tools menu:
The events shown under “ButtonWidget1” are mirrored in the widget’s properties. Selecting or clearing an event in one window does the same in
the other window, thus enabling (selecting) or disabling (clearing) the corresponding event.
We can add a Check Box widget to the applications display and then use the Event Manager to assign actions to the widget’s events. A Check
Box widget has two events, one for being “Checked” (i.e., selected) and another for being “Unchecked” (i.e., cleared). Enabling the “Checked”
event then allows the selection of the action or actions for that event.
The Actions: sub-window has five tool icons for managing the actions associated with an event:
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Clicking the Create New Action icon ( ) opens the Action Edit dialog.
If you select Custom and click Next, you will see the following dialog. Unfortunately, there is no C code error checking with this window. It just
copies the code into libaria.c and libaria.h. If there is a problem with the code you will not know about it until you try to build your
application. An alternative is just to type a comment such as /*My event goes here*/, generate the code, and then find out where this
comment landed in the code. (Typically, inside libaria_events.c, or libaria_macros.c) You can then write the action routine from within
the MPLAB X IDE editor and compile just that file to debug the code written.
If you select Template, the Action Edit dialog will update, as follows. Select ButtonWidget1.
As shown previously, you next need to select the widget that you want to manipulate with this action. Note that the event originated with
CheckBoxWidget1, but the event’s action can manipulate any of the existing widgets. In this case, ButtonWidget1 has been selected. Clicking Next
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will then bring up a list of the actions available in manipulating a button widget.
You can select the “Set Text” action, which will then change the button’s text property, followed by NEXT, which will open a dialog to select the text
string for this action.
You can then select from the available (already defined) strings which text to use for the button’s text field. Press the Finish button to complete the
definition of this action.
Screen Events
As shown previously, the Graphics Composer Event Manager, Events sub-tab supports screen events when the screen is visible (On Show) and
hidden (On Hide). These events can define event handlers based on Template actions or Custom, user-defined code.
Widget Events
Not all widgets can generate an event. For example, a Label Widget has nothing to generate, it just sits there on the screen, labeling. Here is a list
of the widgets that can generate an event:
• Button – Pressed and Released events
• Check Box – Checked and Unchecked events
• Draw Surface – Draw Notification event
• Image Sequence – Image Changed event
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• Key Pad – Key Click event
• List Wheel – Select Item Changed event
• List – Selection Changed event
• Progress Bar – Value Changed event
• Radio Button – Selected and Deselected event
• Scroll Bar – Value Changed event
• Slider Widget – Value Changed event
• Text Field – Text Changed event
• Touch Test – Point Added event
Graphics Composer Macros
Macros implement event handlers for events that originate outside of graphics primitives such as widgets and are designed to change or
manipulate widgets inside of the graphics part of an application. (Events that originate outside of graphics and don’t touch the graphics part of the
application are outside of the scope of the Graphics Event Manager and are not discussed here.)
The following figure shows a simple example of a macro.
The toolbar for Macros has three icons.
Creating a new macro and selecting its actions is just like that of a widget event:
1. Create a new macro using the “Create New Macro” tool. The check box to the left of the new macro’s name enables/disables the macro.
Clearing it removes the macro from the next code generation.
2. Select the new macro and edit it using the second icon (shown previously).
3. In the Actions: window, select Create New Action. An optional name can be provided in the Name: box. You can then choose to use a
Template and select a predefined action or Custom to create a customized action.
4. If you chose a “Custom” action, proceed as discussed previous in Graphics Composer Events. When using templates the next step is to
choose the target widget for the action. This choice is limited to those only the widgets in the currently “active” screen. If your application has
multiple screens and the widget you are targeting is not part of the currently active screen you need to change the active screen.
• Changing the active screen can be done by selecting the corresponding screen tab at the bottom of the Graphics Composer Screen
Designer
• Alternately, you can switch using the Graphics Composer Manager:Screens tab
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5. After selecting the target widget for this macro, click Next button to select an action related to this widget. (Just as with template-based widget
events.) The macro can contain more than one action, targeting more than one widget.
Graphics Events Test Bed
Additional examples of events and macros can be found in the MPLAB Harmony project found in ./apps/examples/events_testbed. This project is
based on the Quick Start Guide “Adding an Event to the Aria Quickstart Demonstration” found in Volume 1 of MPLAB Harmony’s built-in
documentation.
This project has target configurations for PIC32MZ DA and EF starter kits with the MEB2 graphics board. It demonstrates the following
events/macros:
Event Testbed
Source Inside of Graphics (Destination) Outside of Graphics (Destination)
Inside of
Graphics
"Event"
Button changes button text from "Make Changes. Generate. Run" to
"Ouch! Ouch! Ouch!"
"Event"
Virtual Switch S1 changes MED2 LEDs D6 and D7 on/off
via boolean semaphore
Outside of
Graphics
"Macro"
APP_Tasks changes color scheme for Virtual LEDs D6 and D7
between LED_OFF and LED_ON
Not supported by Event Manager Tool
MEB2 S1 changes MEB2 LEDs D6 and D7
Asserting the “Make Changes. Generate. Run” button on the display changes its text to “Ouch! Ouch! Ouch!”. Pressing the MEB2’s Switch S1
changes the LED D6 and D7 on the MEB2 board as well as changing the virtual LEDs D6 and D7 on the display. Pressing the display’s virtual S1
switch does the same.
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The application’s events are defined in libaria_events.c:
#include "gfx/libaria/libaria_events.h"
// CUSTOM CODE - DO NOT DELETE
extern bool bDisplay_S1State;
// END OF CUSTOM CODE
// ButtonWidget1 - PressedEvent
void ButtonWidget1_PressedEvent(laButtonWidget* btn)
{
// ButtonDown - Set Text - ButtonWidget1
laButtonWidget_SetText((laButtonWidget*)ButtonWidget1,
laString_CreateFromID(string_OuchOuchOuch));
}
// ButtonWidget1 - ReleasedEvent
void ButtonWidget1_ReleasedEvent(laButtonWidget* btn)
{
// ButtonUp - Set Text - ButtonWidget1
laButtonWidget_SetText((laButtonWidget*)ButtonWidget1,
laString_CreateFromID(string_Instructions));
}
// Display_S1 - PressedEvent
void Display_S1_PressedEvent(laButtonWidget* btn)
{
// CUSTOM CODE - DO NOT DELETE
bDisplay_S1State = true;
// END OF CUSTOM CODE
}
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// Display_S1 - ReleasedEvent
void Display_S1_ReleasedEvent(laButtonWidget* btn)
{
// CUSTOM CODE - DO NOT DELETE
bDisplay_S1State = false;
// END OF CUSTOM CODE
}
The ButtonWidget1 changes the text using the laButtonWidget_SetText function. Details on how this is accomplished are discussed in the
Quick Start Guide “Adding an Event to the Aria Quickstart Demonstration”.
The Display_S1 widget just sets a Boolean semaphore bDisplay_S1State. Creating the events for the Display_S1 virtual switch is easy, just
enable the widget’s events in the widget’s properties:
This will create empty event handlers in libaria_events.c, which can then be modified to change the boolean semaphore
bDisplay_S1State as shown above.
The application’s macros are defined in libaria_macros.c change the coloring scheme for the display’s virtual LEDs:
#include "gfx/libaria/libaria_macros.h"
void LEDsTurnOn(void)
{
if(laContext_GetActiveScreenIndex() != default_ID)
return;
// TurnOnDisplayD6 - Set Scheme - MEB2_LED_D6
laWidget_SetScheme((laWidget*)MEB2_LED_D6, &LED_ON);
// TurnOnDisplayD7 - Set Scheme - MEB2_LED_D7
laWidget_SetScheme((laWidget*)MEB2_LED_D7, &LED_ON);
}
void LEDsTurnOff(void)
{
if(laContext_GetActiveScreenIndex() != default_ID)
return;
// TurnOffDisplayD6 - Set Scheme - MEB2_LED_D6
laWidget_SetScheme((laWidget*)MEB2_LED_D6, &LED_OFF);
// TurnOffDisplayD7 - Set Scheme - MEB2_LED_D7
laWidget_SetScheme((laWidget*)MEB2_LED_D7, &LED_OFF);
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}
The difference between the color scheme LED_OFF and LED_ON is only in the base color:
The macros LEDsTurnOn and LEDsTurnOff are called from the application’s main task loop, APP_Tasks. The work of controlling the LEDs is
done in the APP_STATE_SERVICE_TASKS case.:
#include "gfx/libaria/libaria_macros.h"
bool bMEB2_S1State = false;
bool bDisplay_S1State = false;
bool bLED_State = false;
bool bLED_StateNow;
void APP_Tasks ( void )
{
/* Check the application's current state. */
switch ( appData.state )
{
/* Application's initial state. */
case APP_STATE_INIT:
{
bool appInitialized = true;
if (appInitialized)
{
appData.state = APP_STATE_SERVICE_TASKS;
}
break;
}
case APP_STATE_SERVICE_TASKS:
{
bMEB2_S1State = !BSP_SWITCH_S1StateGet(); // Closed --> grounded
bLED_StateNow = bMEB2_S1State || bDisplay_S1State;
if ( bLED_State != bLED_StateNow )
{// LED state has changed
if ( bLED_StateNow )
{
BSP_LED_D6On(); // MEB2 LED D6 On
BSP_LED_D7On(); // MEB2 LED D7 On
LEDsTurnOn(); // Turn display LEDs on
}
else
{
BSP_LED_D6Off(); // MEB2 LED D6 Off
BSP_LED_D7Off(); // MEB2 LED D7 Off
LEDsTurnOff(); // Turn display LEDs off
}//end if ( bMEB2_S1State || bDisplay_S1State )
bLED_State = bLED_StateNow; // Remember new state
}
break;
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}
/* TODO: implement your application state machine.*/
/* The default state should never be executed. */
default:
{
/* TODO: Handle error in application's state machine. */
break;
}
}
}
Heap Estimator
Provides information on heap space allocation.
Description
Many parts of a graphics design are implemented using memory allocated from the application’s heap space. Therefore, it is important to allocate
sufficient memory for the heap. This tool can estimate heap usage by the allocation based on the widgets, layers, screens, and decoders currently
in the design.
When launching the tool from the Tools menu, the Heap Configuration window appears.
Clicking Calculate estimates heap usage. The following figure shows what occurs within the Aria Quickstart demonstration if the heap space is
only 4096 bytes:
The Summary tab shows how the estimated heap requirements was derived by summing up all the sizes shown under the “Size (Bytes)” column.
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Note that the largest contribution comes from the screen requiring the largest heap allocation (in this case MainMenu).
If there is insufficient memory allocated to the heap, an exclamation point ( ! ) appears in the window. If you hold your mouse pointer over this icon,
the following message appears:
You can click Set MHC Heap Value to reset the heap allocation to match the estimated requirements. Selecting Add to MHC Heap Value adds
the estimated heap requirements to the current heap value. (In the case above, this would change the heap allocation to 4096+10664 bytes.)
Alternately, you can set the heap allocation to a larger value by going to the MPLAB Harmony Configurator window, selecting the Options tab and
setting the Heap Size within Device & Project Configuration > Project Configuration.
The Screen Details tab (from the Aria Showcase demonstration) shows screen-by-screen the heap space needed for each layer and widget on the
screen selected.
Note:
After you have updated the Heap Size, either using the Heap Estimator tool or by directly editing the value as shown above, you
must regenerate the project using the Generate Code button. This will update the actual heap size value used in building the
application.
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Clicking the “Name” column will alphabetize the list. Clicking the “Size (Bytes)” column sorts the assets by size, with the largest at the top and
smallest at the bottom.
This sub-tab can help in managing the application’s utilization of heap space. For example, excess use of cached backgrounds for widgets can
become ruinously expensive, expanding the application’s need for heap well beyond the capabilities of the device. As an example, consider a
screen label from the Aria Showcase demonstration.
The Heap Estimator tool shows that if caching is enabled for the label’s background, this widget requires 23699 bytes of heap to store the widget.
Note that the label is twice the size of the text it contains, so one way of reducing the cost of the widget is to make it smaller, thereby reducing the
number of background pixels that must be stored. If the label is resized, the heap allocation is reduced to 11688 bytes, which is a drop of
appoximately 50%. Finally, if the background is changed from “Cache” to “Fill” the widget only needs 188 bytes.
The lesson learned is to use Cache as a background only for widgets where it is absolutely necessary and to make the “cached” widgets as small
as possible.
Global Palette
Provides information on the Global Palette features.
Description
The Global Palette window is launched from the Graphics Composer’s Asset pull-down menu.
Using a Global Palette enables frame buffer compression for the LCC graphics controller. It creates a 256 color look up table (LUT) and then
changes the entire user interface design to adhere to that LUT. Frame buffers are stored as 8 bits/pixel (bpp) indices rather than 16-32 bpp colors.
The display driver performs a LUT operation to change each LUT index into a color before writing to the display/controller memory. This enables
the use of double buffering, without using external memory, on devices that could not support it before. It also supports single buffering on larger
displays. Of course, running the LUT requires more processing on the host. Currently only the LCC graphics controller supports this feature. The
Aria demonstration Aria Basic Motion is an example of how using a Global Palette greatly improves the efficiency and capabilities of a design.
Enable the Global Palette by clicking on the Enable Global Palette check box in the window or using the File > Settings menu. the Global palette
can always be disabled. MHGC will then restore the project back to its original configuration.
If the global palette is enabled you will have to change the MHC configuration of the Graphics Controller to match. For the LCC controller, enable
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"Palette Mode". For the GLCD controller, change the Driver Settings > Fame Buffer Color Mode to "LUT8".
The results of enabling the Global Palette:
• 8bpp frame buffers. In the case of the most common demonstrations this means a 50% reduction in the size of the frame buffer.
• This also opens up the capability to support a single frame buffer for some larger displays.
What is lost by enabling the Global Palette:
• First and foremost - No Dynamic Colors. Dynamic colors are unlikely to match up with an entry in the global palette’s look-up table.
• No alpha blending capability. The level of alpha blending can be changed during run-time. (See No Dynamic Colors.)
• No JPEGs or PNGs. Again, no dynamic colors. All images in MGHC will be changed to the color mode of the project, and generated as Raw.
• No font anti-aliasing. Again, no dynamic colors. While the 8-bits/pixel for each glyph is known, the color of the text depends on the color
scheme used, and color schemes can change at run time.
• Additional overhead when performing LUT (index->color) operations in the display driver.
The following figure shows the default “Global Palette” when Project Color Mode is set to RGB_888.
This default palette is good for designs that use a wide array of colors. MHGC also supports developing a custom palette by importing an image
defining the palette or by analyzing the pixel colors already in use by the application’s images. The palette’s color mode is determined by the
Project Color Mode, which is determined by the graphics controller.
Clicking on an entry in the palette with bring up the Color Picker dialog window, allowing you to edit the entry’s color.
Window Toolbar
There are four icons on the toolbar:
1. Import From Image File - Importing a global palette from an image file. Selecting this brings up the following warning. Images can be imported
as a BMP,.GIF, JPEG, and PNG (but not TIFF).
2. Auto-Calculate Palette – Calculates a new palette using the current design. Selecting this brings up the following warning.
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• Selecting Yes opens a status window that shows the progress made in selecting a palette of 256 colors
• This can be lengthy operation, but it will effectively generate a palette better tailored to the design. However, extreme (or rare) colors will be
changed to nearby, more-plentiful colors, thereby eliminating some of the contrast in images. Whites will tend to darken and blacks lighten. This
can be remedied by editing the calculated palette to whiten the whites, darken the blacks, and make other colors closer to the original. This of
course may increase the posterization of the image, but that is a natural trade-off in using only 256 colors.
3. Reset to Default – This returns the Global Palette to its default values, which opens the Reset Global Palette dialog.
4. Enable Global Palette – This performs the same function as File > Settings: Using a Global Palette. Selecting this opens the Enable Global
Palette Mode warning.
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Widget Colors
Provides information on widget coloring.
Description
Widget Colors
Widget coloring can be customized by creating additional color schemes and assigning these customized schemes to a subset of the widgets
uses. For example, a ButtonColorScheme could be customized and used only for Button Widgets.
To help highlight the different colors available for each widget, a “CrazyScheme”, with extreme contrast among the 16 available colors, was used
as the color scheme for each widget:
Use this color scheme to help identify the relevant colors for the widgets listed below.
The left column shows the coloring assignments for a Bezel boarder. The right side shows Line/No Border color assignments.
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Widget With Bezel Border Widget With Line or No Borders
Arc Widget:
Bar Graph:
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Code Generation
This topic describes using the graphics composer to generate code.
Description
MPLAB Harmony Graphics Composer data is generated the same way as the rest of the project within MHC through the Generate button.
libaria_harmony.h/c – These files provide the interface that binds libaria to the overall MPLAB Harmony framework. They contain the
implementations for the standard state management, variable storage, and initialization and tasks functions. If the touch functionality is enabled
then the touch bindings are also generated in libaria_harmony.c.
libaria_init.h/c - These files contain the main initialization functions for the library state and screens. The header file contains all predefined
information for the library state including screen IDs, schemes, and widget pointers. The main initialization function initializes all schemes and
screens, creates all screen objects, and sets the initial state of the library context. As each screen must be capable of being created at any time,
each screen has a unique create function that can be called at any time by the library. The libaria_init.c file contains these create functions.
libaria_events.h/c – The event files contain the definitions and implementations of all enabled MHGC events. Each event implementation will
contain all generated actions for that event.
libaria_macros.h/c – The macro files contain the definitions and implementations of all defined MHGC screen macros. A macro is similar to an
event in that it can contain actions. However, it is meant to be called from an external source such as the main application.
libaria_config.h – This file contains configuration values for the library. These are controlled through settings defined in the MHC settings tree.
gfx_display_def.c – This file contains generated definitions for enabled graphics displays.
gfx_driver_def.c – This file contains generated definitions for enabled graphics drivers.
gfx_processor_def.c – This file contains generated definitions for enabled graphics processors.
gfx_assets.h/c – These files contain generated asset data.
Advanced Topics
This section provides advanced information topics for MHGC.
Adding Third-Party Graphics Products Using the Hardware Abstsraction Layer (HAL)
This topic provides information on using the Hardware Abstraction Layer (HAL) to add third-party graphics products.
Description
The architecture of the MPLAB Harmony Graphics Stack is shown in the following diagram.
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Hardware Abstraction Layer (HAL)
The HAL is a software layer that serves as a gatekeeper for all graphics controller and accelerator drivers. This layer is configured at initialization
by the underlying graphics drivers and provides functionality such as buffer management, primitive shape drawing, hardware abstraction, and draw
state management. This layer serves as a means of protection for the drivers, frame buffers, and draw state in order to prevent state
mismanagement by the application.
Third-Party Graphics Library
The third-party graphics library can be used with the MPLAB Harmony framework to perform the graphics operations desired by the application.
The third-party library has access to the HAL, which has been configured to service the frame buffer which is filled by the third-party graphics
library.
The third-party graphics library can access the MPLAB Harmony framework drivers such as touch drivers, graphics controller driver, and display
driver through the HAL. The draw pipeline and the user interface (UI) design files come from the third-party graphics library. The third-party
graphics library needs the frame buffer location to fill the frame buffer with the pixel values. Or, in case of external controllers, it would need a
function to access the controller drivers to output pixels on the display. The HAL provides the third-party graphics library with the frame buffer
location or the API to communicate the pixel values to the external controllers.
The following figure from the MPLAB Harmony Configurator (MHC), shows the selections made in the Graphics Stack to enable the needed
graphics display and controller features. Note that the Draw Pipeline for the MPLAB Harmony Graphics Stack has been disabled to assure that the
third-party graphics alone is taking effect. The MPLAB Harmony Graphics Configurator (MHGC) is also not enabled, as the design tools from the
third-party graphics library are used to generate the UI graphics. The LCDConf.c file has appropriate APIs for the third-party graphics library to
communicate through the HAL with the display drivers and the framebuffer.
Example Demonstration Project
The Aria demonstration project, emwin_quickstart, has three configurations. Each configuration has an API named LCD_X_Config, which is
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generated with the relevant calls for SEGGER emWin to communicate with the display driver and obtain the frame buffer location pointer to write
the pixel data to it. For PIC32MZ DA and PIC32MZ EF configurations, the frame buffer pointer address is provided to SEGGER emWin by the
HAL. For the S1D controller on PIC32MX devices (pic32mx_usb_sk2_s1d_pictail_wqvga), The pixel write function pointers are assigned to the
appropriate S1D driver APIs, which allow SEGGER emWin to write to the display controller.
Speed and Performance of Different Image Decode Formats in MHGC
Provides information and recommendations for image decode formats.
Description
MHGC supports various image formats and the MHGC Image Assets Manager provides the ability to convert and store a source image into to the
following formats
• Bitmap RAW
• Bitmap Raw Run-Length Encoded (RLE)
• JPEG
• PNG
• Predecoded RAW Bitmap in DDR (PIC32MZ DA)
The following table shows the relative rendering time and Flash memory requirements of the different image formats in the MPLAB Harmony
Graphics Library. The rendering time includes decoding the image and drawing it to the screen. This information is helpful when optimizing a
MPLAB Harmony graphics project for performance and/or Flash memory space. For example, as shown by the red highlighted text in the table, a
40x40 pixel 16-bit RAW image renders 2.38 times faster and uses 2.59 times more Flash space than a JPEG image.
Predecoded Images in DDR (RAW)
For PIC32MZ DA devices with DDR, the MHGC Image Asset Manager provides an option to predecode images from Flash and store them into
DDR as RAW images. The GPU is used to render the decoded image from DDR to the frame buffer. This provides a faster render time than an
equivalent RAW image in Flash memory, specifically for large images (up to 10 times faster for a 200x200 image). Conversely, predecoding small
images 40x40 pixels or smaller in DDR may not render faster due to the additional overhead of setting up the GPU.
Recommendations:
• If there is adequate DDR memory available, consider predecoding images to DDR for best performance
• Using JPEG images and predecoding them into DDR can provide the best rendering performance and most Flash memory savings.
Note:
The images are decoded from Flash to DDR memory by the Graphics Library during initialization and may introduce delay at
boot-up, depending on the number and size of the images.
RAW Images
RAW images provide fast rendering time, as there is no decoding needed. However, depending on image content, it can be two times larger than a
Run-Length Encoded (RLE) image and about 3 to 10 times larger than a JPEG.
Recommendation:
For small images that are to be rendered frequently, consider using a RAW image for better performance
JPEG Images
JPEG images provide the most Flash space savings, but are slower to render compared to RAW and RAW RLE.
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Recommendations:
• If images are large and not used frequently, consider using the JPEG image format to save flash memory space
• If DDR memory is available, consider predecoding JPEG images in DDR for better rendering performance
Run-Length Encoded RAW Images
In terms of rendering speed and size, RAW RLE images are in between RAW and other compressed formats like JPEG or PNG. Depending on the
image contents, RAW RLE can be approximately 1.5 times faster than JPEG, but could be significantly larger in size for large images. Again,
depending on the image content, RAW RLE can be about half the size and performance of a RAW image.
Recommendation:
If optimizing your application for both speed and flash size consider using RAW RLE images
PNG Images
Among the image formats, PNG is slowest to render and requires more memory to decode.
Recommendations:
• Unless fine levels of alpha-blending are needed, it is better to use other image formats to achieve the best performance. Use the MHGC Asset
Manager to convert the source PNG image and store it in a different image format.
• If you would like to use an image with a transparent background, it may be better to use a RAW RLE image with background color masking to
achieve the same effect with better performance than a PNG. Color masking is supported in the MHGC Image Asset Manager.
Draw Pipeline Options
This section details how to use the Graphics Pipeline.
Description
The nominal rendering pipeline for an image is shown in the following figure.
The order of rendering for other widgets may differ. For example, for a colored rectangle the color mask is first checked. If the rectangle’s fill
matches the mask color defined then there is nothing to draw.
Graphics Pipeline
Provides information on the graphics pipeline.
Description
Layer Clipping
In order of the processing, Layer Clipping is first applied to the image. If the image extends beyond the edges of the layer that contains it then
those pixels are not drawn. Failure to clip out-of-bound pixels can cause the application to crash. The following figures shows an example of layer
clipping:
Before applying layer boundaries:
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After applying layer boundaries:
Rectangle Clipping
Next, the image is clipped to the boundaries of any widgets that contain it as a parent, such as a rectangle.
Before applying the clipping rectangle.:
After applying the clipping rectangle:
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Color Masking of Pixels
Pixels in the image are matched to a mask color. If the colors match the pixel is discarded (not drawn). In the following example, the black border
of the image is removed by defining the mask color to be black.
Before applying color mask:
After applying color mask:
Orientation and Mirroring
The logical orientation of the graphics design may not match the physical layout of the display. Pixels may need to be reoriented from logical to
physical space before being rendered.
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Pixels may also need to be flipped (mirrored) before being rendered.
Alpha Blending
Each pixel drawn is a composite of the image color and the background color based on the alpha blend value defined by a global alpha value, the
pixels alpha value, or both.
Before alpha blending:
After alpha blending:
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Color Conversion
The image color format may not be the same as the destination frame buffer. Each pixel must be converted before it is written. In the following
example, the image is stored using 24 bits per pixel; however, the frame buffer uses 16 bits per pixel.
Frame Buffer Write
The final stage in rendering an image is to write each-color converted pixel to the frame buffer.
Graphics Pipeline Options
Provides information graphics pipeline options.
Description
Each stage in the graphics pipeline adds overhead to the rendering. Stages can be removed from processing using MPLAB Harmony Configurator
(MHC) options for the Draw Pipeline, found by selecting MPLAB Harmony Framework Configuration > Graphics Stack.
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For example, the Alpha Blending stage can be disabled if your graphics application does not use alpha blending. If the color mode of the display
matches the color mode of all images you can disable Color Conversion. Disabling unneeded stages can improve performance and reduce code
size.
Also, a graphics controller driver may add additional stages, or opt to bypass stages completely depending on the capabilities of the graphics
hardware supported by the driver.
Improved Touch Performance with Phantom Buttons
This topic provides information on the use of phantom buttons to improve touch performance.
aria_coffeemaker Demonstration Example
Provides image examples with buttons in the aria_coffeemaker demonstration.
Description
Small buttons are hard to activate on the screen. The use of phantom (invisible) buttons can improve touch performance without increasing the
size of the visible footprint of the button on the display.
The aria_coffee_maker has a sliding tray on each side of the display. Sliding a tray in, or out, is accomplished by a phantom (invisible) button.
Looking at the left tray, we see the three parts of this phantom button.
1. LeftTrayLid: An invisible button widget, whose outline is shown in blue. This area is the touch field.
2. ImageWidget5: An image widget containing a hand icon, providing a visual clue as to how to manipulate the tray.
3. The Release Image and Pressed Image: These are defined as part of the button widget properties. The Pressed Image has a darker coloring
than the Released Image. This difference is what shows the user that the button has been pressed.
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The drawing hierarchy for this part of the design is shows that ImageWidget5 is a daughter widget to the LeftTrayLid button widget.
Examining the properties of the LeftTrayLid button widget reveals more about how this works. The following figure demonstrates these three
properties.
1. The Border is defined as None.
2. Background Type is defined as None.
3. The different images used will show when the button is Pressed or Released.
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By setting the border and background to None, the button is invisible. Only by providing different images for Released versus Pressed does the
user know when the button has been pressed.
The actual touch region defined by the button is much larger than the images shown on the display. This extra area increases the touch response
of the display.
Small Buttons Controlled by Phantom Buttons
Provides information on phantom button control of small buttons.
Description
When the border is not set to None, and the background is not set to None, the button widget provides a direct visible clue to the user when it is
pressed. Which can be seen in the following figure with the button from aria_quickstart. In aria_quickstart, ButtonWidget1 has a bevel border, and
a fill background.
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Let’s use aria_quickstart to demonstrate how to control ButtonWidget1 using a phantom button to surround it, thereby increasing touch
responsiveness.
When using a bevel border and filled background, the button provides visible feedback when it is asserted.
To use this feedback mechanism instead of images, there is a way to have a small button on the display, with a larger touch zone provided by
another phantom button.
Steps:
1. Click on ButtonWidget1 in the Screen Designer panel. Go to the Properties Editor panel for the widget and uncheck the Enabled property to
disable the button. Enable Toggleable so that this button will have a memory.
2. Drag a new button from the Widget Tool Box panel and center it around ButtonWidget1. In the Properties Editor panel for this new button,
change the name of the widget to PhantomButton. Change the Background Type to None. Leave the Border set as Bevel for now. The
following figure displays the new button in the Screen Designer panel:
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The Properties Editor panel should display the following information.
3. In the Tree View panel, drag ButtonWidget1 to be a daughter widget of PhantomWidget. When PhantomWidget is moved, ButtonWidget1 will
move along with the parent.
4. Click on PhantomButton again in the Screen Designer panel and move to the Properties Editor. Enable both the Pressed and Released events.
Then click on the (…) icon to define the events. (See the following two steps.)
5. Defining the Pressed Event.
Click on the (…) icon. In the Event Editor, under Pressed dialog, click the New icon to define a new event. In the Action Edit Dialog that next
appears, leave the selection on the template and hit the Next button. In the next window, select the target of the event. We want to change the
state of ButtonWidget1, so select it and hit Next. The next dialog shows all the template actions that we can use to modify ButtonWidget1. Choose
Set Pressed State and hit Next. Set the Argument to Enable Pressed. Name this event Set Press state for ButtonWidget1 then hit Finish. Leave
the Event Editor by hitting Ok.
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6. Defining the Released Event.
Click on the (…) icon. In the Event Editor, under Released dialog, click the New icon to define a new event. In the Action Edit Dialog that next
appears, leave the selection on the template and hit the Next button. In the next window, select the target of the event. We want to change the
state of ButtonWidget1, so select it and hit Next. Choose Set Pressed State and hit Next. Leave the Argument disabled. Name this event Unset
Press state for ButtonWidget1 then hit Finish. Leave the Event Editor by hitting Ok.
7. Generate the application from the MPLAB Harmony Configurator main menu.
8. From the MPLAB main menu, build and run the project. To verify that ButtonWidget1 does change, click outside of the original boundaries.
9. As a final step, hide the PhantomButton by changing its border to None. Next, Generate the code again from MHC. Finally, build and run the
project from MPLAB and see how much easier it is to assert ButtonWidget1 using a phantom button.
GPU Hardware Accelerated Features
This section details how to configure the GPU hardware accelerated features.
Description
On the PIC32MZ DA devices, the on-board 2D Graphics Processing Unit (GPU) peripheral allows certain features to be accelerated. These
features are:
• Line draw
• Single-color rectangle fill
• Image Blit
Once configured, these features are supported by the Hardware Abstraction Layer (HAL) and can be enabled or disabled at run-time. When
disabled, the HAL falls back to the software-based algorithms, and relies on the CPU to perform the features.
Configuring for GPU Hardware Acceleration
The Nano2D library, is the driver library that permits hardware acceleration via the GPU. To make sure the Nano2D library is configured as part of
your application, make sure to enable this in the MPLAB Harmony Configurator (MHC) under Graphics Stack > Use Graphics Stack > Graphics
Processor > Select Processor Type > NANO 2D.
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Enabling/Disabling GPU Hardware Acceleration at Runtime
Once configured, the hardware acceleration via the GPU is enabled by default at launch. The hardware acceleration can subsequently be turned
on or off at runtime by calling the following lines of code:
Enable acceleration:
GFX_Set(GFXF_DRAW_PIPELINE_MODE, GFX_PIPELINE_GCUGPU);
Disable acceleration:
GFX_Set(GFXF_DRAW_PIPELINE_MODE, GFX_PIPELINE_GCU);
This change takes effect immediately for subsequent draw instructions into HAL.
Line Draw and Rectangle Fill Hardware Acceleration
When the GPU hardware acceleration is enabled, line draw and rectangle fill features are automatically supported. This is supported by HAL
function calls GFX_DrawLine and GFX_RectFill. The actual routing of the call between the hardware accelerated support versus the
software-based algorithmic support is abstracted from the caller.
The following table displays performance improvement by comparing the frame update rate of rectangular fills of varying sizes with, and without
hardware acceleration. The table shows that the higher the frame update rate, the better the performance. The measurement is performed using
the entire Harmony Graphics Stack but with most Aria draw pipeline features disabled, so that the focus is on HAL performance.
Rect Fill Size No Acceleration Frame Update
Frequency (Hz)
Hardware accelerated Frame Update
Frequency (Hz)
Performance Improvement
60x60 101 160 58.4%
100x100 37 158 327.0%
140x140 19 157 726.3%
180x180 11 156 1318.2%
220x220 8 155 1837.5%
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Note:
The HAL uses a software algorithm for rectangle fill sizes below 50x50, as the CPU is able to perform the operation faster than the
GPU below that size.
Image Blit Hardware Acceleration
The only way Image Blits significantly leverage hardware acceleration is via the block transfer of image data that has been preprocessed into
DDR/Internal SRAM memory into frame buffer memory.
Note:
The GPU is able to interpret and transfer pixel data in RGB565 or RGBA8888 format only.
The following table displays performance improvement by comparing the frame update rate of the image blit of the same 100x100 image in varying
formats with, and without GPU acceleration. The table shows that the higher the frame update rate, the better the performance. There is a marked
performance increase when using the preprocessing method (despite the amount of image data is doubled in RGBA8888 versus RGB565).
Image Format (100x100) No Acceleration Frame
Update Frequency (Hz)
GPU Frame Update
Frequency (Hz)
Performance
Improvement
RGB565 raw pixels 37 60 62.1%
RGB565 with RLE compression 26 34 30.8%
JPEG (24-bit) 17 22 29.4%
PNG (32-bit) 13 15 15.4%
Preprocessed RGBA8888 raw pixels 29 161 455.2%
The GPU works best with image sizes in powers of two (such as 128x128 instead of 125x105). Images with sizes that are not a power of two may
be rendered with artifacts. This is often a case-by-case situation and the way to remedy this is to pad the memory footprint up to the nearest power
of two.
Prior to application use, images stored in flash storage will need to be preprocessed, converting them from the original format into a raw bitmap.
There are two methods to achieve this:
1. Calling from application code: The API GFXU_Preprocess Image can be used to preprocess an image asset to a target memory location (DDR
or internal SRAM) while specifying the destination color mode (RGB565 or RGBA8888). The application developer will need to manage the
target memory and be careful not to stomp on other critical memory structures such as the frame buffer, or the GPU’s command buffer. Power
of two padding can be enabled via the API.
2. The application developer can also use the Image Assets options within the MPLAB Harmony Graphics Composer User's Guide (MHGC) to
specify that certain image assets should be preprocessed at application launch. This can be achieved by enabling image preprocessing as
shown under the Preprocessing sub-section of the Image Asset window as shown in the following figure:
For more information, see Image Assets and DDR Organizer under the Graphics Composer Asset Management section above.
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Image Preprocessing Memory Management
This sections describes preprocessing.
Description
Whether using internal SRAM only or DDR memory, care must be taken when allocating memory for preprocessing images. For more information,
see Image Assets and DDR Organizer under the Graphics Composer Asset Management section above.
Preprocessing using DDR
For PIC32MZ DA devices with access to DDR memory, the frame buffer and the command buffer for the GPU is also located on the DDR. It is
important for the application developer to select the appropriate memory location in DDR for image preprocessing without trampling on these other
memory structures.
The following table specifies the available addressing region to access the DDR memory.
Device Type Address Range Begin (KSEG1) Address Range End (KSEG1)
Internal DDR (maximum size 32 MB) 0xA8000000 0xA9FFFFFF
External DDR (maximum size 128 MB) 0xA8000000 0xAFFFFFFF
At configuration time, MHGC generates the frame buffer allocation in the application’s system configuration code.
This allocation is targeting a WVGA RGBA8888 3-overlay double-buffered configuration; therefore, six buffer allocations are specified. More DDR
memory can be freed up for image preprocessing using the following:
• WVGA Resolution is not required
• Enable all three overlays
• Double frame buffering
The application developer may choose to change the allocation manually in system_config.h.
The following table breaks down the allocation:
Frame Buffer Address Range Begin Address Range End
Layer0 Buffer 0 0xA8000000 0xA8176FFF
Layer0 Buffer 1 0xA8465000 0xA85DBFFF
Layer1 Buffer 0 0xA8177000 0xA82EDFFF
Layer1 Buffer 1 0xA85DC000 0xA8752FFF
Layer2 Buffer0 0xA82EE000 0xA8464FFF
Layer2 Buffer1 0xA8753000 0xA88CBFFF
For an example on using image preprocessing using DDR memory, please refer to the aria_coffee_maker application.
Internal SRAM Only
When operating with only the internal SRAM, the frame buffer can take up a significant portion of available memory. To avoid system stability
issues with dynamically allocating memory for the preprocessing, the application developer may want to predetermine the memory footprint
required for the image and assign the memory statically.
For an example of image preprocessing using internal SRAM, please refer to the aria_radial_menu application.
Creating a MPLAB Harmony Graphics Application Using a Third-Party Display
This demonstration provides a step-by-step example of how to create a MPLAB Harmony graphics application using a non-Microchip (third-party)
display.
Description
Introduction
Creating a new MPLAB Harmony graphics application using a Microchip board and a Microchip display is very simple: A new MPLAB Harmony
application is created and the Board Support Package (BSP) belonging to the hardware configuration is selected. If the project is using a
third-party display then there are more steps and this tutorial will provide an example of the process.
This tutorial shows how to connect a third-party display to the PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Starter Kit board (EF
Starter Kit) using two Microchip Adapter boards and a custom ribbon cable. It shows how to setup the pinouts, configure graphics, and adapt an
existing MPLAB Harmony capacitive touch driver to support the display board’s capacitive touch controller.
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Prerequisites
Before beginning this tutorial, ensure that the MPLAB X IDE is installed along with the necessary language tools as described in Volume I: Getting
Started With MPLAB Harmony > Prerequisites. In addition, ensure that MPLAB Harmony is installed on the hard drive, and that the correct MPLAB
Harmony Configurator (MHC) plug-in is installed in the MPLAB X IDE.
A basic familiarity with application development under MPLAB X and MPLAB Harmony is required, including how to use MPLAB Harmony
Configurator (MHC). There are introductory videos on Microchip’s YouTube channel for those who have never used MPLAB Harmony. The first
video to watch is Getting Started with MPLAB Harmony. There is also a Creating Your First Project tutorial in Volume 1 of MPLAB Harmony’s
documentation.
For first time users of MPLAB Harmony Graphics there is a video series on YouTube. The first video is MM MPLAB® Harmony Edition - Ep. 7 -
MPLAB Harmony Graphics Composer Suite. In Volume 1 of MPLAB Harmony’s documentation there are Quick Start tutorials covering graphics,
located at Quick Start Guides > Graphics and Touch Quick Start Guides.
Tutorial Resources
The folder ./apps/examples in MPLAB Harmony has a project that can be copied and used as the base of this tutorial,
3rd_party_display_start, and a project that represents the completed project from this tutorial, 3rd_party_display.
This is what you will find in the ./apps/examples folder under Harmony 2.06:
3rd_party_display
3rd_party_display_start
creating_your_first_project
peripheral
events_testbed
system
If there are difficulties then compare the completed project with the current project.
Tutorial Hardware
Of all the PIC32MZ devices available today, the PIC32MZ EF family is the best candidate for this effort. The EF family does not have on-chip
graphics controller or Graphics Processing Unit (GPU), which makes it a less expensive and lower power solution for use with a display that has a
built-in controller.
Mikroelektronika (Mikroe) offers a prototype display that can be used using a ribbon cable between the display and the EF host. This third party
(non-Microchip) board serves as the basis for this tutorial. The ‘TFT PROTO 5" Capacitive’ display costs around 100USD and is available for order
online (https://www.mikroe.com/tft-proto-5-capacitive-board). It has an 800x480 pixel WVGA display, driven by an SSD1963 graphics controller.
The SSD1963 graphics controller is already supported in MPLAB Harmony. It has a Focal Tech FT5x06 capacitive touch controller. This tutorial
will cover how to design the pin-out between the EF host and display board, as well as how to adapt an existing MPLAB Harmony capacitive touch
driver (MTCH6303) to support the Focal Tech touch controller.
For this tutorial the following hardware will be used:
1. PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Starter Kit board (Part # DM320007).
2. Starter Kit I/O Expansion Board (Part # DM320002) – this provides the 0.1” headers we need to connect up the display using a ribbon cable or
0.1" jumpers.
3. PIC32MZ Starter Kit Adaptor Board (Part # AC320006) – this provides an 168 to 132 pin adapter to adapt the 168-pin connector on the EF
starter kit with the 132 pin connector on the I/O Expansion Board.
4. Mikroelektronika TFT PROTO 5" Capacitive display.
5. 40 to 50 pin ribbon cable to connect the I/O Expansion Board to the display, or a set of colored 0.1" jumpers.
Here is how the hardware is assembled:
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The connectors that route signals from the EF pins to the display’s ribbon cable are:
The EF Starter Kit + 168-132 Pin Adapter + I/0 Expansion board can host any number of prototype hardware configurations. A spreadsheet has
been developed that maps every pin of the EF device to a pin on the I/O Expansion board, with one final spreadsheet tab that provides the pin
outs for the ribbon cable that connects the display to the I/O Expansion Board. (The spreadsheet is found in the Zip file
.\apps\examples\3rd_party_display\pinouts.zip.) The picture above shows the board connectors used in getting from a pin on the EF
device to a pin on the display’s ribbon connector.
This spreadsheet has the following tabs:
1. Sorted by Skit J1 Pins – This tab maps EF pins to pins on the J1 (168 pin) connector on the 168-132 pin adapter. It also maps the 168-pin J1
connecter to the J2 132-pin connecter. Pins are sorted by the pin order on the Starter Kit 168-pin J1 connector.
2. Sorted by Device Pins – A copy of the first tab, sorted by EF device pins.
3. Sorted by Adaptor J2 Pins – A copy of the first tab, sorted by the pins on the J2 132-pin adaptor.
4. PIC32 IO Expansion Pin Out – Provides the pin out of the I/O Expansion Board from the 132-pin J1 connector to the 0.1” pitch headers on the
board (J10,J11).
5. End to End – maps the EF device pins to the 0.1” pitch headers on the I/O Expansion Board. This tab can be reused to map out other
application pin outs.
6. Mikroe Display – Provides the pin outs for the 40-pin ribbon cable connector (CN3) on the display board.
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7. End to End by Device Pins – This tab combines Tab 4 with Tab 6. It shows how to build a ribbon cable between the I/O Expansion Board and
the display. On this tab the rows belonging to EF device pins that aren’t part of the ribbon cable are hidden for the sake of simplicity.
Tab 7 of the spreadsheet shows:
The ribbon cable for this project is constructed using the map from J10 Pin#/J11 Pin # to the TFT Proto 5” Pin #. For example, the first line of the
Tab 7 shows that pin 7 of the J10 header on the I/O expansion board is connected to pin 18 of the display connector, thereby connecting PMPD5
(PMP data pin 5) on the device to TFT-D5 on the display.
Note: display pins with a “#” suffix indicate that the signal is active low (# = bar).
TFT-Dn display pins are part of the SSD1963 display controller’s Parallel Master Port (PMP) interface. Other TFT-* pins are part of the controller to
host interface. For example, TFT-WR# is connected to the controller’s WRbar (write strobe bar) pin, which is called WR_STROBE_BAR in the
MPLAB Harmony Graphical Pin Manager. (Setting up the project’s pins using the Pin Manager is discussed later in the tutorial.)
On the display connector FT5x06 capacitive touch controller pins are called CTP-*. There is an I2C clock pin (CTP-SCL), I2C data pin (CTP-SDA),
an interrupt pin to alert the host of a touch event (CTP-INT#), and reset/wakeup pins (CTP-RST#/CTP-WAKE#).
Creating the Project in MPLAB and MPLAB Harmony
Getting Started
The pre-installed project, 3rd_party_display_start can be used as a basis for the work discussed in this tutorial. Be sure to copy this project to a
place in the MPLAB Harmony directory hierarchy that is just as deep. If this is not done, all the relative paths in the project’s configuration will no
longer find the project’s files and nothing will build.
For example, copying 3rd_party_display_start into a directory .\apps\3rd_party_display will not work, since the target directory is
one level higher in MPLAB Harmony’s directory hierarchy. The directory .\apps\gfx\3rd_party_display will work since it is at the same
level in the hierarchy.
There is an extra file in the .\apps\examples\3rd_party_display_start file (xc32_vm.nn_pic32mx_include_assert.h) , which
provides the modification to the compiler’s assert.h as discussed in Volume 1 of MPLAB Harmony’s documentation (Creating Your First
Project). This modification supports producing breakpoints under the debugger when an assert fails, which can be very useful in debugging the
code. Simply use this file to replace ./xc32/vm.nn/pic32mx/include/assert.h,where m.nn represents the version number of
the compiler you are using.
For first time users of the PIC32MZ product line and MPLAB Harmony should create the starting the project from scratch. Follow the instructions in
“Creating Your First Project”, which is found in Volume 1: Getting Started With MPLAB Harmony Libraries and Applications. Call the new project
3rdPartyDisplay instead of Heartbeat.
In Part 1, Step 3 of the Creating Your First Project, use a different application name than “heartbeat." For example accept the default “app”, then
replace “heartbeat” with the new application name in the tutorial code examples. If the default application name “app” is used then “heartbeat” is
replaced by “app” in the code examples. The header file heartbeat.h would be named app.h instead and it should contain:
typedef enum
{
/* Application's state machine's initial state. */
APP_STATE_INIT=0,
APP_STATE_SERVICE_TASKS,
/* TODO: Define states used by the application state machine. */
APP_RESTART_TIMER
} APP_STATES;
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Here the enum is called APP_STATES instead of HEARTBEAT_STATES and the state APP_RESTART_TIMER replaces the state
HEARTBEAT_RESTART_TIMER. The structure HEARTBEAT_DATA is now called APP_DATA:
typedef struct
{
/* The application's current state */
APP_STATES state;
/* TODO: Define any additional data used by the application. */
SYS_TMR_HANDLE hDelayTimer; // Handle for delay timer
} APP_DATA;
The same principle applies to app.c (instead of heartbeat.c in the tutorial). The structure heartbeatData is now called appData. The source
file app.c should contain:
{
/* Check the application's current state. */
switch ( appData.state )
{
/* Application's initial state. */
case APP_STATE_INIT:
{
bool appInitialized = true;
if (appInitialized)
{
appData.hDelayTimer = SYS_TMR_DelayMS(HEARTBEAT_DELAY);
if (appData.hDelayTimer != SYS_TMR_HANDLE_INVALID)
{ // Valid handle returned
BSP_LEDOn(HEARTBEAT_LED);
appData.state = APP_STATE_SERVICE_TASKS;
}
appData.state = APP_STATE_SERVICE_TASKS;
}
break;
}
case APP_STATE_SERVICE_TASKS:
{
if (SYS_TMR_DelayStatusGet(appData.hDelayTimer))
{ // Single shot timer has now timed out.
BSP_LEDToggle(HEARTBEAT_LED);
appData.state = APP_RESTART_TIMER;
}
break;
}
/* TODO: implement your application state machine.*/
case APP_RESTART_TIMER:
{ // Create a new timer
appData.hDelayTimer = SYS_TMR_DelayMS(HEARTBEAT_DELAY);
if (appData.hDelayTimer != SYS_TMR_HANDLE_INVALID)
{ // Valid handle returned
appData.state = APP_STATE_SERVICE_TASKS;
}
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break;
}
/* The default state should never be executed. */
default:
{
/* TODO: Handle error in application's state machine. */
break;
}
}
}
At the end of the Creating Your First Project tutorial, the project supports a HyperTerminal console on a PC, which can be used to display
diagnostic messages. The project will also support the advanced error handling (asserts and exceptions) that MPLAB Harmony provides.
When running this application, verify that the HyperTerminal application (115200 baud, 8 bits, no stop bits) sees an initialization message of,
Application created Mar 1 2018 15:09:50 initialized! at startup, where the date and time report when the app.c file was last compiled. This
message originates in the application initialization function:
void APP_Initialize ( void )
{
SYS_MESSAGE("\r\nApplication created " __DATE__ " " __TIME__ " initialized!\r\n");
//Test out error handling
// assert(0);
// {
// uint8_t x, y, z;
// x = 1;
// y = 0;
// z = x/y;
// SYS_DEBUG_PRINT(SYS_ERROR_DEBUG,"x: %d, y: %d, z: %d\r\n",x,y,z);
// }
/* Place the App state machine in its initial state. */
appData.state = APP_STATE_INIT;
/* TODO: Initialize your application's state machine and other
* parameters.
*/
}
Verify that asserts and exception handling work before proceeding. Uncomment the assert and test. Then comment out the assert and uncomment
the {…} clause to test out exceptions.
Note:
If this is the first time hooking up a HyperTerminal session to the EF Starter Kit using the MCP2221, see Part 3 of the Creating
Your First Project tutorial in Volume 1 of MPLAB Harmony’s documentation. This part of the tutorial shows how to hookup the EF
Starter Kit to your PC. It also discusses in Steps 11 and 12 how to setup your HyperTerminal application.
Setting Up Pins using the MPLAB Harmony Graphical Pin Manager
Since a pre-defined Board Support Package is not available, pin assignments will have to be manually entered into the Pin Manger using the “Pin
Settings” tab. Load the startup project, either from a copy made from .\apps\examples\3rd_party_display_start or one created from
scratch. Then run MPLAB Harmony Configurator:
From MPLAB Harmony Configurator, select the Pin Settings tab:
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Make these modifications to the pin table:
The pins labeled USART to USB Bridge (BSP) support the MCP2221 USART to USB device on the EF Starter Kit board. It provides a
HyperTerminal interface on the PC. This is setup in the 3rd_party_diaplay_start project.
Be sure the touch interrupt event interrupt (pin 104, CTP_INT_BAR) pin is pulled high (CNPU enabled), otherwise touch event interrupts will never
fire:
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Setting up Graphics
In MPLAB Harmony Configurator, under the Options tab:
open Harmony Framework Configuration > Graphics Stack and enable the Graphics Stack with the following settings.
First select a “Custom Display” as the display type.
Then enter the dimensions of the Mikroe display (800x480).
Note:
The display can be set in MHC’s Display Manager.
Enable the Graphics Stack using the MHC’s Options tab, it is easier to do the basic display setup here. Later the Display Manager will be used to
tune the display’s timing (syncs plus front porches and back porches) so that all 800x480 pixels are correctly displayed. For now, accept the
default display timings.The equivalent setup using the Display Manager is:
The Mikroe display uses a SSD1963 graphics controller to run the TFT display, which is supported in MPLAB Harmony. This graphics controller is
connected to the EF host using the Parallel Master Port (PMP), I2C, and GPIO peripherals. (For details, see the Setting Up Pins using the MPLAB
Harmony Graphical Pin Manager section above.)
Under Graphics Stack > Graphics Controller, select the SSD1963 graphics controller, enable the controller’s backlight PWM. Change the pixel
clock from the default to 30 MHz and click “Execute” to compute the Pixel Clock Prescaler value. Finally, since the system clock for the EF host
runs at 200 MHz, add an additional NOP for correct Write Strobe timing.
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Finally, verify Use Touch System Service? (Deprecated) is enabled:
When finished, re-generate the code to capture these new settings using the Generate Code button in MPLAB Harmony Configurator.
Be sure to use the Prompt Merge For All Differences merge strategy to maintain code customizations installed outside of MHC.
After regenerating the project, you will have to customize the system_init.c file, found in the project under Source Files / app /
system_config / , where is typically "default". Move the
SYS_PORTS_Initialize call from the middle of SYS_Initialize to between SYS_DEVCON_PerformanceConfig and BSP_Initialize.
The Old location:
The New location is:
Tuning Display Timing Using Display Manager
The next step is to tune the timing of the display using the Display Manger to prevent the edges of the screen from being clipped. A rectangle
needs to be drawn on the edges of the screen. Then by building and running the application, we can see if any parts of the border rectangle are
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clipped or missing. A different color is needed for each of the four sides of the border rectangle, as in some cases the display controller’s memory
pointers can “wrap” a pixel from one side of the display to the opposite side. If all the sides are the same color this would not be apparent. Here is
the screen to implement in the Screen Designer panel:
Each side of the border will require a custom color scheme. The border is created by drawing four separate lines using four separate line widgets.
Examine how line widgets are colored by dragging a line widget from the Widget Toolbox panel onto the Screen Designer panel and then pick the
Properties Editor Panel for that widget. Click on the “?” to the right of the Scheme property.
This will bring up the “Line Widget Scheme Helper” window:
If the Background and Shape of the widget are colored with the same color, different for each side, then the four edges of the display are easily
marked. Using the same colors for the line, and the widget’s background, allows the use of the size and position of the line widget rather than the
line’s coordinates to mark that edge of the display.
To create the display, within MHC, launch the Graphics Composer.
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Using the Scheme panel, create four new color schemes.
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Next, drag a line widget onto the display four times and edit each widget’s properties to create and position each edge of the display’s border:
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Note that the “Line” coordinates are set to [0,0,0,0] since it is the size of the widget rather than the widget’s line that marks each border line. The
lines in these widgets are not used. Each widget’s position and size mark an edge of the display, not the line. Re-generate the application and then
run it.
The HyperTerminal application (115200 baud, 8 bits, no stop bits) should show the following when the application boots up:
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Examine the border of the resulting display,note that the top edge of the border is completely missing and the left edge is about half the width
desired, compared to the right and bottom edges. To fix this the display timings need to be adjusted using the Display Manager:
If this is the first time using the Display Manger, Volume 1 of MPLAB Harmony’s documentation has a Display Manager Quick Start Guide and
Volume III has the MPLAB Harmony Display Manager User’s Guide. Increase the Horizonal Pulse Width by two clocks, re-generate, and then run.
The left border should be fully visible.
Next, tune the Vertical Pulse Width. Gradually increasing it to move the top border line down until it is fully visible. (22 H-syncs seems to be the
correct value.)
After each adjustment re-generate, build and run, then examine the resulting display. Stop when all borders are fully visible and there are no
“dead” (black) pixels on the display.
In the Display Manger, the final, optimal, settings for the display are:
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When finished, the display should be:
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A picture of each edge through a 10x power loupe verifies that each edge is exactly 4 pixels wide and there are no “dead” (black) pixels between
the edges of the display and the colored border.
The Mikroe board uses a Riverdi RVT50AQTNWC00 display.
Table 8.3 of its datasheet covers display timing:
Some explanation is required to match up this data with the Display Manager’s settings. Back porch timings are not shown in the table, but can be
calculated by subtracting the HS/VS pulse width from the HS/VS Blanking:
HS Back Porch = HS Blanking – HS pulse width = Thbp = Thb – Thfp
VS Back Porch = VS Blanking – VS pulse width = Tvbp = Tvb – Tvfp
The DCLK Frequency typical value of 30 MHz has already been used in setting up the display pixel clock speed. However, using the “Typ”
(Typical) values, and the calculated Thbp and Tvbp values from the equations above, the timing will not work. The timing values that work for this
tutorial meet the minimum or maximum range shown above with one exception:
The “One Horizontal Line” timing, Th, has a minimum of 889 pixel clocks, but the one in use is:
Th = Thpw + Thbp + 800 pixels+ Thfp = 44 + 2 +800 + 2 = 848 pixel clocks < 889
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which is 41 pixel clocks (4.6%) below the minimum Th of 889 shown in Table 8.3 above.
Results may vary on your display. This was tested on two different boards with the same results. Starting out with the default display timings and
then iteratively tuning them to reduce pixel clipping and dead pixels, as discussed above, will provide the optimal display timings for the hardware
regardless of the final settings.
Supporting the Focal Tech FT5x06 Capacitive Touch Controller
Microchip (Atmel) and Focal Tech are key providers of capacitive touch controllers. Focal Tech FT5x06 touch controllers are found on many of the
displays used by Microchip customers, so a third-party display with a Focal Tech capacitive touch controller is a good choice for this tutorial.
MPLAB Harmony provides these touch controller drivers:
The Generic Touch Driver outlines the generic Touch Driver API supported by MPLAB Harmony. It provides a template that can serve as the base
for a custom-built driver for the FT5x06 touch controller.
A faster way to support the Focal Tech FT5x06 is to find a similar device that is already supported in MPLAB Harmony and simply modify the
driver code for that device. This eliminates having to write all the supporting code needed to fit the new driver into MPLAB Harmony. Capacitive
touch devices typically have an I2C interface with the host, and an interrupt signal that is driven low to alert the host that a touch event has been
detected. In response to this external interrupt the host uses the I2C interface with the device to query the device and read the (x,y) pixel
coordinates of the touch event.
The FT5x06 command interface is closest to the MTCH6303 interface since it requires a write command followed by a read command to get the
touch event. (The MTCH6301 only requires the read message.) The other thing to be aware of is the data order coming from the chip.
FT5x06 Memory:
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© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.06 123
Modifying MPLAB Harmony’s MTCH6303 Touch Driver for the Focal Tech FT5x06
The first step towards supporting the FT5x06 is to add a MTCH6303 driver to the application, and then modify the MTCH6303’s code to support
the FT5x06. To support the FT5x06, we will add a C preprocessor #if defined(FT_SUPPORT)…#else…#endif clauses to the code and then define
FT_SUPPORT in the project’s C compiler properties.
To add the MTCH6303 touch driver, make the following changes to the project’s MHC settings:
Be sure to increase the event queue depth from the default of 10 to something larger, here it is 25. The controller’s CTP-INT# (CTP_INT_BAR in
the Pin Settings table) is connected to INT0, so change the external interrupt source to INT_SOURCE_EXTERNAL_0.
Next, enable the I2C driver, using a bit-banged implementation:
The Interrupt System Service is enabled, with an Interrupt Priority of 5, connected to INT0, and triggered on a falling edge (since CTP-INT# is
active low):
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Re-generate the application to implement these changes to the application.
Rather than edit the application’s MTCH6303 driver code, install the modified driver from the tutorial project found in
.\apps\examples\3rdPartyDisplay. Copy the code found in directory
.\apps\examples\3rdPartyDisplay\firmware\src\system_config\default\framework\driver\touch\mtch6303
into the same folder in the project.
To keep these changes in the code whenever the project is regenerated, always choose the “Prompt Merge For All Differences” merge strategy
and simply close all the windows related to the MTCH6303 driver. These changes are identified by // CUSTOM CODE – DO NOT DELETE … //
END OF CUSTOM CODE flags in the code.
Note:
Ignore all proposed changes for the following files:
• drv_mtch6303_static.h
• drv_mtch6303_static.c
• drv_mtch6303_static_local.h
To enable Focal Tech support in the modified driver, open the project’s configuration and define FT_SUPPORT in the C compiler section.
Adding a Touch Test Widget
Bring up MHC’s Graphics Composer again and add a Touch Test widget to the screen. Resize the widget to cover most of the display. Next,
create another color scheme, and customize it to see the cross hairs for all touch measurements reported by the widget.
The TouchTest Widget has the following color scheme:
First, create a new scheme, call it TouchTestScheme:
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© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.06 125
Edit the Foreground and Background colors so that both are red.
Finally, edit the properties for the Touch Test widget to have a Line border, and to use the TouchTestScheme color scheme:
The Screen Designer panel should show:
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Close the Graphics Composer window and save the modifications to the graphics design. Re-generate the application’s code and then build and
load the application.
Testing the Final Application
Here is what the display should look like during a touch event:
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Completed Tutorial Project
The completed tutorial project can be found in .\apps\examples\3rdPartyDisplay.
Importing and Exporting Graphics Data
This topic provides information on importing and exporting graphics composer-related data.
Description
The MPLAB Harmony Graphics Composer (MHGC) provides the capability for users to import and export graphics designs. The user can export
the state of an existing graphics composer configuration or import another graphics composer configuration from another project.
Importing Data
1. To import a graphics design into MHGC, select File > Import. The Browse for MPLAB Harmony Graphics Composer XML file dialog appears,
which allows the selection of a previously exported Graphics Composer .xml file, or the configuration.xml file that contains the desired
graphics image.
2. After selecting a file and clicking Open, you will be prompted whether to overwrite existing data.
3. If you selected a composer_export.xml file, clicking Yes will replace the current graphics design with the new design.
4. Otherwise, if you selected a configuration.xml file, you will be prompted to import the data into the current graphics design. Click Yes to
replace the current graphics design with the new design.
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© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.06 128
Exporting Data
1. To export a graphics design from MHGC, select File > Export. The Select File Location for MPLAB Harmony Graphics Composer XML file
dialog appears.
2. To export a graphics design using a configuration.xml file, use the Save Configuration utility from the MPLAB Harmony Configurator
(MHC) toolbar.
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© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.06 129
MPLAB Harmony Graphics Composer Suite
This section provides user information about using the MPLAB Harmony Graphics Composer Suite (MHGS).
Description
Please see Volume IV: MPLAB Harmony Framework Reference > Graphics Libraries Help > MPLAB Harmony Graphics Composer Suite for
detailed information.
Volume III: MPLAB Harmony Configurator (MHC) MPLAB Harmony Graphics Composer Suite
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.06 130
Index
A
Adding Third-Party Graphics Products Using the Hardware Abstsraction
Layer (HAL) 90
Advanced Topics 90
aria_coffeemaker Demonstration Example 98
B
Binary Assets 66
C
Code Generation 90
Creating a MPLAB Harmony Graphics Application Using a Third-Party
Display 106
Creating the Project in MPLAB and MPLAB Harmony 109
D
DDR Organizer 47
Draw Pipeline Options 93
E
Event Manager 67
F
Font Assets 55
G
Global Palette 78
GPU Hardware Accelerated Features 103
Graphics Composer Asset Management 42
Graphics Composer Window User Interface 3
Graphics Pipeline 93
Graphics Pipeline Options 97
H
Heap Estimator 76
I
Image Assets 49
Image Preprocessing Memory Management 106
Importing and Exporting Graphics Data 128
Improved Touch Performance with Phantom Buttons 98
Introduction 3
M
Memory Configuration 43
Menus 10
MHGC Tools 67
MPLAB Harmony Graphics Composer Suite 130
MPLAB Harmony Graphics Composer User's Guide 3
N
New Project Wizard 14
O
Object Properties 30
Options 26
P
Properties Editor Panel 29
S
Schemes Panel 24
Screen Designer Window 6
Screens Panel 22
Small Buttons Controlled by Phantom Buttons 100
Speed and Performance of Different Image Decode Formats in MHGC 92
String Assets 63
String Table Configuration 60
Supporting the Focal Tech FT5x06 Capacitive Touch Controller 122
T
Tree View Panel 18
V
Volume III: MPLAB Harmony Configurator (MHC) 2
W
Widget Colors 81
Widget Tool Box Panel 26
Index
© 2013-2017 Microchip Technology Inc. MPLAB Harmony v2.06 131
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Microchip's Authorized Design Partner Program Benefi ts
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Use of Microchip's Design Partner Program logo ü ü ü ü
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Features
• High-performance, Low-power 32-bit Atmel® AVR® Microcontroller
– Compact Single-cycle RISC Instruction Set Including DSP Instructions
– Read-modify-write Instructions and Atomic Bit Manipulation
– Performance
• Up to 64DMIPS Running at 50MHz from Flash (1 Flash Wait State)
• Up to 36DMIPS Running at 25MHz from Flash (0 Flash Wait State)
– Memory Protection Unit (MPU)
• Secure Access Unit (SAU) providing User-defined Peripheral Protection
• picoPower® Technology for Ultra-low Power Consumption
• Multi-hierarchy Bus System
– High-performance Data Transfers on Separate Buses for Increased Performance
– 12 Peripheral DMA Channels improve Speed for Peripheral Communication
• Internal High-speed Flash
– 256Kbytes, 128Kbytes, and 64Kbytes Versions
– Single-cycle Access up to 25MHz
– FlashVault Technology Allows Pre-programmed Secure Library Support for End
User Applications
– Prefetch Buffer Optimizing Instruction Execution at Maximum Speed
– 100,000 Write Cycles, 15-year Data Retention Capability
– Flash Security Locks and User-defined Configuration Area
• Internal High-speed SRAM, Single-cycle Access at Full Speed
– 32Kbytes (256Kbytes and 128Kbytes Flash) and 16Kbytes (64Kbytes Flash)
• Interrupt Controller (INTC)
– Autovectored Low-latency Interrupt Service with Programmable Priority
• External Interrupt Controller (EIC)
• Peripheral Event System for Direct Peripheral to Peripheral Communication
• System Functions
– Power and Clock Manager
– SleepWalking Power Saving Control
– Internal System RC Oscillator (RCSYS)
– 32 KHz Oscillator
– Multipurpose Oscillator, Phase Locked Loop (PLL), and Digital Frequency Locked
Loop (DFLL)
• Windowed Watchdog Timer (WDT)
• Asynchronous Timer (AST) with Real-time Clock Capability
– Counter or Calendar Mode Supported
• Frequency Meter (FREQM) for Accurate Measuring of Clock Frequency
• Universal Serial Bus (USBC)
– Full Speed and Low Speed USB Device Support
– Multi-packet Ping-pong Mode
• Six 16-bit Timer/Counter (TC) Channels
– External Clock Inputs, PWM, Capture, and Various Counting Capabilities
• 36 PWM Channels (PWMA)
– 12-bit PWM with a Source Clock up to 150MHz
• Four Universal Synchronous/Asynchronous Receiver/Transmitters (USART)
– Independent Baudrate Generator, Support for SPI
– Support for Hardware Handshaking
32142D–06/2013
32-bit Atmel
AVR
Microcontroller
ATUC256L3U
ATUC128L3U
ATUC64L3U
ATUC256L4U
ATUC128L4U
ATUC64L4U
2
32142D–06/2013
ATUC64/128/256L3/4U
• One Master/Slave Serial Peripheral Interface (SPI) with Chip Select Signals
– Up to 15 SPI Slaves can be Addressed
• Two Master and Two Slave Two-wire Interfaces (TWI), 400kbit/s I2
C-compatible
• One 8-channel Analog-to-digital Converter (ADC) with up to 12 Bits Resolution
– Internal Temperature Sensor
• Eight Analog Comparators (AC) with Optional Window Detection
• Capacitive Touch (CAT) Module
– Hardware-assisted Atmel® AVR® QTouch® and Atmel® AVR® QMatrix Touch Acquisition
– Supports QTouch and QMatrix Capture from Capacitive Touch Sensors
• QTouch Library Support
– Capacitive Touch Buttons, Sliders, and Wheels
– QTouch and QMatrix Acquisition
• Audio Bitstream DAC (ABDACB) Suitable for Stereo Audio
• Inter-IC Sound (IISC) Controller
– Compliant with Inter-IC Sound (I2
S) Specification
• On-chip Non-intrusive Debug System
– Nexus Class 2+, Runtime Control, Non-intrusive Data and Program Trace
– aWire Single-pin Programming Trace and Debug Interface, Muxed with Reset Pin
– NanoTrace Provides Trace Capabilities through JTAG or aWire Interface
• 64-pin TQFP/QFN (51 GPIO Pins), 48-pin TQFP/QFN/TLLGA (36 GPIO Pins)
• Six High-drive I/O Pins (64-pin Packages), Four High-drive I/O Pins (48-pin Packages)
• Single 1.62-3.6V Power Supply
3
32142D–06/2013
ATUC64/128/256L3/4U
1. Description
The Atmel® AVR® ATUC64/128/256L3/4U is a complete system-on-chip microcontroller based
on the AVR32 UC RISC processor running at frequencies up to 50MHz. AVR32 UC is a highperformance
32-bit RISC microprocessor core, designed for cost-sensitive embedded applications,
with particular emphasis on low power consumption, high code density, and high
performance.
The processor implements a Memory Protection Unit (MPU) and a fast and flexible interrupt controller
for supporting modern and real-time operating systems. The Secure Access Unit (SAU) is
used together with the MPU to provide the required security and integrity.
Higher computation capability is achieved using a rich set of DSP instructions.
The ATUC64/128/256L3/4U embeds state-of-the-art picoPower technology for ultra-low power
consumption. Combined power control techniques are used to bring active current consumption
down to 174µA/MHz, and leakage down to 220nA while still retaining a bank of backup registers.
The device allows a wide range of trade-offs between functionality and power consumption,
giving the user the ability to reach the lowest possible power consumption with the feature set
required for the application.
The Peripheral Direct Memory Access (DMA) controller enables data transfers between peripherals
and memories without processor involvement. The Peripheral DMA controller drastically
reduces processing overhead when transferring continuous and large data streams.
The ATUC64/128/256L3/4U incorporates on-chip Flash and SRAM memories for secure and
fast access. The FlashVault technology allows secure libraries to be programmed into the
device. The secure libraries can be executed while the CPU is in Secure State, but not read by
non-secure software in the device. The device can thus be shipped to end customers, who will
be able to program their own code into the device to access the secure libraries, but without risk
of compromising the proprietary secure code.
The External Interrupt Controller (EIC) allows pins to be configured as external interrupts. Each
external interrupt has its own interrupt request and can be individually masked.
The Peripheral Event System allows peripherals to receive, react to, and send peripheral events
without CPU intervention. Asynchronous interrupts allow advanced peripheral operation in low
power sleep modes.
The Power Manager (PM) improves design flexibility and security. The Power Manager supports
SleepWalking functionality, by which a module can be selectively activated based on peripheral
events, even in sleep modes where the module clock is stopped. Power monitoring is supported
by on-chip Power-on Reset (POR), Brown-out Detector (BOD), and Supply Monitor (SM). The
device features several oscillators, such as Phase Locked Loop (PLL), Digital Frequency
Locked Loop (DFLL), Oscillator 0 (OSC0), and system RC oscillator (RCSYS). Either of these
oscillators can be used as source for the system clock. The DFLL is a programmable internal
oscillator from 20 to 150MHz. It can be tuned to a high accuracy if an accurate reference clock is
running, e.g. the 32KHz crystal oscillator.
The Watchdog Timer (WDT) will reset the device unless it is periodically serviced by the software.
This allows the device to recover from a condition that has caused the system to be
unstable.
The Asynchronous Timer (AST) combined with the 32KHz crystal oscillator supports powerful
real-time clock capabilities, with a maximum timeout of up to 136 years. The AST can operate in
counter or calendar mode.
4
32142D–06/2013
ATUC64/128/256L3/4U
The Frequency Meter (FREQM) allows accurate measuring of a clock frequency by comparing it
to a known reference clock.
The Full-speed USB 2.0 device interface (USBC) supports several USB classes at the same
time, thanks to the rich end-point configuration.
The device includes six identical 16-bit Timer/Counter (TC) channels. Each channel can be independently
programmed to perform frequency measurement, event counting, interval
measurement, pulse generation, delay timing, and pulse width modulation.
The Pulse Width Modulation controller (PWMA) provides 12-bit PWM channels which can be
synchronized and controlled from a common timer. 36 PWM channels are available, enabling
applications that require multiple PWM outputs, such as LCD backlight control. The PWM channels
can operate independently, with duty cycles set individually, or in interlinked mode, with
multiple channels changed at the same time.
The ATUC64/128/256L3/4U also features many communication interfaces, like USART, SPI,
and TWI, for communication intensive applications. The USART supports different communication
modes, like SPI Mode and LIN Mode.
A general purpose 8-channel ADC is provided, as well as eight analog comparators (AC). The
ADC can operate in 10-bit mode at full speed or in enhanced mode at reduced speed, offering
up to 12-bit resolution. The ADC also provides an internal temperature sensor input channel.
The analog comparators can be paired to detect when the sensing voltage is within or outside
the defined reference window.
The Capacitive Touch (CAT) module senses touch on external capacitive touch sensors, using
the QTouch technology. Capacitive touch sensors use no external mechanical components,
unlike normal push buttons, and therefore demand less maintenance in the user application.
The CAT module allows up to 17 touch sensors, or up to 16 by 8 matrix sensors to be interfaced.
All touch sensors can be configured to operate autonomously without software interaction,
allowing wakeup from sleep modes when activated.
Atmel offers the QTouch library for embedding capacitive touch buttons, sliders, and wheels
functionality into AVR microcontrollers. The patented charge-transfer signal acquisition offers
robust sensing and includes fully debounced reporting of touch keys as well as Adjacent Key
Suppression® (AKS®) technology for unambiguous detection of key events. The easy-to-use
QTouch Suite toolchain allows you to explore, develop, and debug your own touch applications.
The Audio Bitstream DAC (ABDACB) converts a 16-bit sample value to a digital bitstream with
an average value proportional to the sample value. Two channels are supported, making the
ABDAC particularly suitable for stereo audio.
The Inter-IC Sound Controller (IISC) provides a 5-bit wide, bidirectional, synchronous, digital
audio link with external audio devices. The controller is compliant with the Inter-IC Sound (I2S)
bus specification.
The ATUC64/128/256L3/4U integrates a class 2+ Nexus 2.0 On-chip Debug (OCD) System,
with non-intrusive real-time trace and full-speed read/write memory access, in addition to basic
runtime control. The NanoTrace interface enables trace feature for aWire- or JTAG-based
debuggers. The single-pin aWire interface allows all features available through the JTAG interface
to be accessed through the RESET pin, allowing the JTAG pins to be used for GPIO or
peripherals.
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2. Overview
2.1 Block Diagram
Figure 2-1. Block Diagram
INTERRUPT
CONTROLLER
ASYNCHRONOUS
TIMER
PERIPHERAL
DMA
CONTROLLER
HSB-PB
BRIDGE B
HSB-PB
BRIDGE A
S
MM M
S
S
M
EXTERNAL INTERRUPT
CONTROLLER
HIGH SPEED
BUS MATRIX
GENERALPURPOSE I/Os
GENERAL PURPOSE I/Os
PA
PB
EXTINT[5..1]
NMI
PA
PB
SPI
DMA
MISO, MOSI
NPCS[3..0]
USART0
USART1
USART2
USART3
DMA
RXD
TXD
CLK
RTS, CTS
WATCHDOG
TIMER
SCK
JTAG
INTERFACE
MCKO
MDO[5..0]
MSEO[1..0]
EVTI_N
TDO
TDI
TMS
CONFIGURATION REGISTERS BUS
256/128/64
KB S FLASH
FLASH
CONTROLLER
EVTO_N
AVR32UC CPU
NEXUS
CLASS 2+
OCD
INSTR
INTERFACE
DATA
INTERFACE
MEMORY INTERFACE
LOCAL BUS
32/16 KB
SRAM
MEMORY PROTECTION UNIT
LOCAL BUS
INTERFACE
FREQUENCY METER
PWMA[35..0] PWM CONTROLLER
TWI MASTER 0
DMA
TWI MASTER 1
TWI SLAVE 0
DMA
TWI SLAVE 1
8-CHANNEL ADC
DMA
INTERFACE
POWER MANAGER
RESET
CONTROLLER
SLEEP
CONTROLLER
CLOCK
CONTROLLER
TCK
RESET_N aWire
CAPACITIVE TOUCH
DMA
MODULE
AC INTERFACE
ACREFN
ACAN[3..0]
ACBN[3..0]
ACBP[3..0]
ACAP[3..0]
TWCK
TWD
TWALM
TWCK
TWD
TWALM
GLUE LOGIC
CONTROLLER IN[7..0]
OUT[1..0]
USB 2.0
Interface 8EP
DMA
INTER-IC SOUND
CONTROLLER
TIMER/COUNTER 0
TIMER/COUNTER 1
A[2..0]
B[2..0]
AUDIO BITSTREAM
DMA
DAC DAC0, DAC1
DACN0, DACN1
ISCK
IWS
ISDI
ISDO
IMCK
CLK
SAU S/M
S
DM
DP
SYSTEM CONTROL
INTERFACE
GCLK[9..0]
XIN32
XOUT32 OSC32K
RCSYS
XIN0
XOUT0 OSC0
DFLL
RC32K
RC120M
RC32OUT
PLL
GCLK_IN[2..0]
CSB[16:0]
SMP
CSA[16:0]
SYNC
VDIVEN
DIS
TRIGGER
ADP[1..0]
AD[8..0]
DATAOUT
ADVREFP
CLK[2..0]
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2.2 Configuration Summary
Table 2-1. Configuration Summary
Feature ATUC256L3U ATUC128L3U ATUC64L3U ATUC256L4U ATUC128L4U ATUC64L4U
Flash 256KB 128KB 64KB 256KB 128KB 64KB
SRAM 32KB 16KB 32KB 16KB
GPIO 51 36
High-drive pins 6 4
External Interrupts 6
TWI 2
USART 4
Peripheral DMA Channels 12
Peripheral Event System 1
SPI 1
Asynchronous Timers 1
Timer/Counter Channels 6
PWM channels 36
Frequency Meter 1
Watchdog Timer 1
Power Manager 1
Secure Access Unit 1
Glue Logic Controller 1
Oscillators
Digital Frequency Locked Loop 20-150MHz (DFLL)
Phase Locked Loop 40-240MHz (PLL)
Crystal Oscillator 0.45-16MHz (OSC0)
Crystal Oscillator 32KHz (OSC32K)
RC Oscillator 120MHz (RC120M)
RC Oscillator 115kHz (RCSYS)
RC Oscillator 32kHz (RC32K)
ADC 8-channel 12-bit
Temperature Sensor 1
Analog Comparators 8
Capacitive Touch Module 1
JTAG 1
aWire 1
USB 1
Audio Bitstream DAC 1 0
IIS Controller 1 0
Max Frequency 50MHz
Packages TQFP64/QFN64 TQFP48/QFN48/TLLGA48
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3. Package and Pinout
3.1 Package
The device pins are multiplexed with peripheral functions as described in Section .
Figure 3-1. ATUC64/128/256L4U TQFP48/QFN48 Pinout GND 1 PA09
2
PA08
3
PA03
4
PB12
5
PB00
6
PB02
7
PB03
8
PA22
9
PA06 10
PA00 11
PA05 12
13 PA02
14 PA01
15 PB13
16 PB14
17 VDDIN
18 VDDCORE
19 GND
20 PB05
21 PB04
22 RESET_N
23 PB10
24 PA21
PA14 36
VDDANA 35
ADVREFP 34
GNDANA 33
PB08 32
PB07 31
PB06 30
PB09 29
PA04 28
PA11 27
PA13 26
PA20 25
PA15 37
PA16 38
PA17 39
PA19 40
PA18 41
VDDIO 42
GND 43
PB11 44
GND 45
PA10 46
PA12 47
VDDIO 48
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Figure 3-2. ATUC64/128/256L4U TLLGA48 Pinout GND 1 PA09
2
PA08
3
PA03
4
PB12
5
PB00
6
PB02
7
PB03
8
PA22
9
PA06 10
PA00 11
PA05 12
PA02 13
14 PA01
15 PB13
16 PB14
17 VDDIN
18 VDDCORE
19 GND
20 PB05
21 PB04
22 RESET_N
23 PB10
24 PA21
PA14 36
VDDANA 35
ADVREFP 34
GNDANA 33
PB08 32
PB07 31
PB06 30
PB09 29
PA04 28
PA11 27
PA13 26
PA20 25
PA15 37
PA16 38
PA17 39
PA19 40
PA18 41
VDDIO 42
GND 43
PB11 44
GND 45
PA10 46
PA12 47
VDDIO 48
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Figure 3-3. ATUC64/128/256L3U TQFP64/QFN64 Pinout GND 1 PA09
2
PA08
3
PB19
4
PB20
5
PA03
6
PB12
7
PB00
8
PB02
9
PB03 10
VDDIO 11
GND 12
PA22 13
PA06 14
PA00 15
PA05 16
17 PA02
18 PA01
19 PA07
20 PB01
21 PB26
22 PB13
23 PB14
24 PB27
PB08 44
PB07 43
PB06 42
PB22 41
PB21 40
PB09 39
PA04 38
VDDIO 37
GND 36
PA11 35
PA13 34
PA20 33
PA15 49
PA16 50
PA17 51
PA19 52
PA18 53
PB23 54
PB24 55
PB11 56
PB15 57
PB16 58
PB17 59
PB18 60
25 VDDIN
26
27 GND
28 PB05
29 PB04
30
31 PB10
32 PA21
PA14 48
VDDANA 47
ADVREFP 46
GNDANA 45
PB25 61
PA10 62
PA12 63
VDDIO 64
VDDCORE
RESET_N
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Peripheral Multiplexing on I/O lines
3.1.1 Multiplexed Signals
Each GPIO line can be assigned to one of the peripheral functions. The following table
describes the peripheral signals multiplexed to the GPIO lines.
Table 3-1. GPIO Controller Function Multiplexing
48-
pin
64-
pin
Pin
Name
G
PI
O Supply
Pad
Type
GPIO Function
ABCDE F GH
11 15 PA00 0 VDDIO Normal
I/O
USART0-
TXD
USART1-
RTS
SPINPCS[2]
PWMAPWMA[0]
SCIFGCLK[0]
CATCSA[2]
14 18 PA01 1 VDDIO Normal
I/O
USART0-
RXD
USART1-
CTS
SPINPCS[3]
USART1-
CLK
PWMAPWMA[1]
ACIFBACAP[0]
TWIMS0-
TWALM
CATCSA[1]
13 17 PA02 2 VDDIO Highdrive
I/O
USART0-
RTS
ADCIFBTRIGGER
USART2-
TXD TC0-A0 PWMAPWMA[2]
ACIFBACBP[0]
USART0-
CLK
CATCSA[3]
4 6 PA03 3 VDDIO Normal
I/O
USART0-
CTS
SPINPCS[1]
USART2-
TXD TC0-B0 PWMAPWMA[3]
ACIFBACBN[3]
USART0-
CLK
CATCSB[3]
28 38 PA04 4 VDDIO Normal
I/O SPI-MISO TWIMS0-
TWCK
USART1-
RXD TC0-B1 PWMAPWMA[4]
ACIFBACBP[1]
CATCSA[7]
12 16 PA05 5 VDDIO Normal
I/O (TWI) SPI-MOSI TWIMS1-
TWCK
USART1-
TXD TC0-A1 PWMAPWMA[5]
ACIFBACBN[0]
TWIMS0-
TWD
CATCSB[7]
10 14 PA06 6 VDDIO
Highdrive
I/O,
5V
tolerant
SPI-SCK USART2-
TXD
USART1-
CLK TC0-B0 PWMAPWMA[6]
EICEXTINT[2]
SCIFGCLK[1]
CATCSB[1]
19 PA07 7 VDDIO Normal
I/O (TWI)
SPINPCS[0]
USART2-
RXD
TWIMS1-
TWALM
TWIMS0-
TWCK
PWMAPWMA[7]
ACIFBACAN[0]
EICNMI
(EXTINT[0])
CATCSB[2]
3 3 PA08 8 VDDIO Highdrive
I/O
USART1-
TXD
SPINPCS[2]
TC0-A2 ADCIFBADP[0]
PWMAPWMA[8]
CATCSA[4]
2 2 PA09 9 VDDIO Highdrive
I/O
USART1-
RXD
SPINPCS[3]
TC0-B2 ADCIFBADP[1]
PWMAPWMA[9]
SCIFGCLK[2]
EICEXTINT[1]
CATCSB[4]
46 62 PA10 10 VDDIO Normal
I/O
TWIMS0-
TWD TC0-A0 PWMAPWMA[10]
ACIFBACAP[1]
SCIFGCLK[2]
CATCSA[5]
27 35 PA11 11 VDDIN Normal
I/O
PWMAPWMA[11]
47 63 PA12 12 VDDIO Normal
I/O
USART2-
CLK TC0-CLK1 CAT-SMP PWMAPWMA[12]
ACIFBACAN[1]
SCIFGCLK[3]
CATCSB[5]
26 34 PA13 13 VDDIN Normal
I/O
GLOCOUT[0]
GLOCIN[7]
TC0-A0 SCIFGCLK[2]
PWMAPWMA[13]
CAT-SMP EICEXTINT[2]
CATCSA[0]
36 48 PA14 14 VDDIO Normal
I/O
ADCIFBAD[0]
TC0-CLK2 USART2-
RTS CAT-SMP PWMAPWMA[14]
SCIFGCLK[4]
CATCSA[6]
37 49 PA15 15 VDDIO Normal
I/O
ADCIFBAD[1]
TC0-CLK1 GLOCIN[6]
PWMAPWMA[15]
CATSYNC
EICEXTINT[3]
CATCSB[6]
38 50 PA16 16 VDDIO Normal
I/O
ADCIFBAD[2]
TC0-CLK0 GLOCIN[5]
PWMAPWMA[16]
ACIFBACREFN
EICEXTINT[4]
CATCSA[8]
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39 51 PA17 17 VDDIO Normal
I/O (TWI) TC0-A1 USART2-
CTS
TWIMS1-
TWD
PWMAPWMA[17]
CAT-SMP CAT-DIS CATCSB[8]
41 53 PA18 18 VDDIO Normal
I/O
ADCIFBAD[4]
TC0-B1 GLOCIN[4]
PWMAPWMA[18]
CATSYNC
EICEXTINT[5]
CATCSB[0]
40 52 PA19 19 VDDIO Normal
I/O
ADCIFBAD[5]
TC0-A2 TWIMS1-
TWALM
PWMAPWMA[19]
SCIFGCLK_IN[
0]
CAT-SYNC CATCSA[10]
25 33 PA20 20 VDDIN Normal
I/O
USART2-
TXD TC0-A1 GLOCIN[3]
PWMAPWMA[20]
SCIFRC32OUT
CATCSA[12]
24 32 PA21 21 VDDIN
Normal
I/O (TWI,
5V
tolerant,
SMBus)
USART2-
RXD
TWIMS0-
TWD TC0-B1 ADCIFBTRIGGER
PWMAPWMA[21]
PWMAPWMAOD
[21]
SCIFGCLK[0]
CATSMP
9 13 PA22 22 VDDIO Normal
I/O
USART0-
CTS
USART2-
CLK TC0-B2 CAT-SMP PWMAPWMA[22]
ACIFBACBN[2]
CATCSB[10]
6 8 PB00 32 VDDIO Normal
I/O
USART3-
TXD
ADCIFBADP[0]
SPINPCS[0]
TC0-A1 PWMAPWMA[23]
ACIFBACAP[2]
TC1-A0 CATCSA[9]
20 PB01 33 VDDIO Highdrive
I/O
USART3-
RXD
ADCIFBADP[1]
SPI-SCK TC0-B1 PWMAPWMA[24]
TC1-A1 CATCSB[9]
7 9 PB02 34 VDDIO Normal
I/O
USART3-
RTS
USART3-
CLK SPI-MISO TC0-A2 PWMAPWMA[25]
ACIFBACAN[2]
SCIFGCLK[1]
CATCSB[11]
8 10 PB03 35 VDDIO Normal
I/O
USART3-
CTS
USART3-
CLK SPI-MOSI TC0-B2 PWMAPWMA[26]
ACIFBACBP[2]
TC1-A2 CATCSA[11]
21 29 PB04 36 VDDIN
Normal
I/O (TWI,
5V
tolerant,
SMBus)
TC1-A0 USART1-
RTS
USART1-
CLK
TWIMS0-
TWALM
PWMAPWMA[27]
PWMAPWMAOD
[27]
TWIMS1-
TWCK
CATCSA[14]
20 28 PB05 37 VDDIN
Normal
I/O (TWI,
5V
tolerant,
SMBus)
TC1-B0 USART1-
CTS
USART1-
CLK
TWIMS0-
TWCK
PWMAPWMA[28]
PWMAPWMAOD
[28]
SCIFGCLK[3]
CATCSB[14]
30 42 PB06 38 VDDIO Normal
I/O TC1-A1 USART3-
TXD
ADCIFBAD[6]
GLOCIN[2]
PWMAPWMA[29]
ACIFBACAN[3]
EICNMI
(EXTINT[0])
CATCSB[13]
31 43 PB07 39 VDDIO Normal
I/O TC1-B1 USART3-
RXD
ADCIFBAD[7]
GLOCIN[1]
PWMAPWMA[30]
ACIFBACAP[3]
EICEXTINT[1]
CATCSA[13]
32 44 PB08 40 VDDIO Normal
I/O TC1-A2 USART3-
RTS
ADCIFBAD[8]
GLOCIN[0]
PWMAPWMA[31]
CATSYNC
EICEXTINT[2]
CATCSB[12]
29 39 PB09 41 VDDIO Normal
I/O TC1-B2 USART3-
CTS
USART3-
CLK
PWMAPWMA[32]
ACIFBACBN[1]
EICEXTINT[3]
CATCSB[15]
23 31 PB10 42 VDDIN Normal
I/O TC1-CLK0 USART1-
TXD
USART3-
CLK
GLOCOUT[1]
PWMAPWMA[33]
SCIFGCLK_IN[
1]
EICEXTINT[4]
CATCSB[16]
44 56 PB11 43 VDDIO Normal
I/O TC1-CLK1 USART1-
RXD
ADCIFBTRIGGER
PWMAPWMA[34]
CATVDIVEN
EICEXTINT[5]
CATCSA[16]
5 7 PB12 44 VDDIO Normal
I/O TC1-CLK2 TWIMS1-
TWALM
CATSYNC
PWMAPWMA[35]
ACIFBACBP[3]
SCIFGCLK[4]
CATCSA[15]
15 22 PB13 45 VDDIN USB I/O USBC-DM USART3-
TXD TC1-A1 PWMAPWMA[7]
ADCIFBADP[1]
SCIFGCLK[5]
CATCSB[2]
16 23 PB14 46 VDDIN USB I/O USBC-DP USART3-
RXD TC1-B1 PWMAPWMA[24]
SCIFGCLK[5]
CATCSB[9]
Table 3-1. GPIO Controller Function Multiplexing
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3.2 See Section 3.3 for a description of the various peripheral signals.
Refer to ”Electrical Characteristics” on page 897 for a description of the electrical properties of
the pin types used.
3.2.1 TWI, 5V Tolerant, and SMBUS Pins
Some normal I/O pins offer TWI, 5V tolerance, and SMBUS features. These features are only
available when either of the TWI functions or the PWMAOD function in the PWMA are selected
for these pins.
Refer to the ”Electrical Characteristics” on page 897 for a description of the electrical properties
of the TWI, 5V tolerance, and SMBUS pins.
57 PB15 47 VDDIO Highdrive
I/O
ABDACBCLK
IISCIMCK
SPI-SCK TC0-CLK2 PWMAPWMA[8]
SCIFGCLK[3]
CATCSB[4]
58 PB16 48 VDDIO Normal
I/O
ABDACBDAC[0]
IISC-ISCK USART0-
TXD
PWMAPWMA[9]
SCIFGCLK[2]
CATCSA[5]
59 PB17 49 VDDIO Normal
I/O
ABDACBDAC[1]
IISC-IWS USART0-
RXD
PWMAPWMA[10]
CATCSB[5]
60 PB18 50 VDDIO Normal
I/O
ABDACBDACN[0]
IISC-ISDI USART0-
RTS
PWMAPWMA[12]
CATCSA[0]
4 PB19 51 VDDIO Normal
I/O
ABDACBDACN[1]
IISC-ISDO USART0-
CTS
PWMAPWMA[20]
EICEXTINT[1]
CATCSA[12]
5 PB20 52 VDDIO Normal
I/O
TWIMS1-
TWD
USART2-
RXD
SPINPCS[1]
TC0-A0 PWMAPWMA[21]
USART1-
RTS
USART1-
CLK
CATCSA[14]
40 PB21 53 VDDIO Normal
I/O
TWIMS1-
TWCK
USART2-
TXD
SPINPCS[2]
TC0-B0 PWMAPWMA[28]
USART1-
CTS
USART1-
CLK
CATCSB[14]
41 PB22 54 VDDIO Normal
I/O
TWIMS1-
TWALM
SPINPCS[3]
TC0-CLK0 PWMAPWMA[27]
ADCIFBTRIGGER
SCIFGCLK[0]
CATCSA[8]
54 PB23 55 VDDIO Normal
I/O SPI-MISO USART2-
RTS
USART2-
CLK TC0-A2 PWMAPWMA[0]
CAT-SMP SCIFGCLK[6]
CATCSA[4]
55 PB24 56 VDDIO Normal
I/O SPI-MOSI USART2-
CTS
USART2-
CLK TC0-B2 PWMAPWMA[1]
ADCIFBADP[1]
SCIFGCLK[7]
CATCSA[2]
61 PB25 57 VDDIO Normal
I/O
SPINPCS[0]
USART1-
RXD TC0-A1 PWMAPWMA[2]
SCIFGCLK_IN[
2]
SCIFGCLK[8]
CATCSA[3]
21 PB26 58 VDDIO Normal
I/O SPI-SCK USART1-
TXD TC0-B1 PWMAPWMA[3]
ADCIFBADP[0]
SCIFGCLK[9]
CATCSB[3]
24 PB27 59 VDDIN Normal
I/O
USART1-
RXD TC0-CLK1 PWMAPWMA[4]
ADCIFBADP[1]
EICNMI
(EXTINT[0])
CATCSA[9]
Table 3-1. GPIO Controller Function Multiplexing
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3.2.2 Peripheral Functions
Each GPIO line can be assigned to one of several peripheral functions. The following table
describes how the various peripheral functions are selected. The last listed function has priority
in case multiple functions are enabled on the same pin.
3.2.3 JTAG Port Connections
If the JTAG is enabled, the JTAG will take control over a number of pins, irrespectively of the I/O
Controller configuration.
3.2.4 Nexus OCD AUX Port Connections
If the OCD trace system is enabled, the trace system will take control over a number of pins, irrespectively
of the I/O Controller configuration. Two different OCD trace pin mappings are
possible, depending on the configuration of the OCD AXS register. For details, see the AVR32
UC Technical Reference Manual.
Table 3-2. Peripheral Functions
Function Description
GPIO Controller Function multiplexing GPIO and GPIO peripheral selection A to H
Nexus OCD AUX port connections OCD trace system
aWire DATAOUT aWire output in two-pin mode
JTAG port connections JTAG debug port
Oscillators OSC0, OSC32
Table 3-3. JTAG Pinout
48-pin 64-pin Pin name JTAG pin
11 15 PA00 TCK
14 18 PA01 TMS
13 17 PA02 TDO
4 6 PA03 TDI
Table 3-4. Nexus OCD AUX Port Connections
Pin AXS=1 AXS=0
EVTI_N PA05 PB08
MDO[5] PA10 PB00
MDO[4] PA18 PB04
MDO[3] PA17 PB05
MDO[2] PA16 PB03
MDO[1] PA15 PB02
MDO[0] PA14 PB09
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3.2.5 Oscillator Pinout
The oscillators are not mapped to the normal GPIO functions and their muxings are controlled
by registers in the System Control Interface (SCIF). Please refer to the SCIF chapter for more
information about this.
3.2.6 Other Functions
The functions listed in Table 3-6 are not mapped to the normal GPIO functions. The aWire DATA
pin will only be active after the aWire is enabled. The aWire DATAOUT pin will only be active
after the aWire is enabled and the 2_PIN_MODE command has been sent. The WAKE_N pin is
always enabled. Please refer to Section 6.1.4.2 on page 44 for constraints on the WAKE_N pin.
EVTO_N PA04 PA04
MCKO PA06 PB01
MSEO[1] PA07 PB11
MSEO[0] PA11 PB12
Table 3-4. Nexus OCD AUX Port Connections
Pin AXS=1 AXS=0
Table 3-5. Oscillator Pinout
48-pin 64-pin Pin Name Oscillator Pin
3 3 PA08 XIN0
46 62 PA10 XIN32
26 34 PA13 XIN32_2
2 2 PA09 XOUT0
47 63 PA12 XOUT32
25 33 PA20 XOUT32_2
Table 3-6. Other Functions
48-pin 64-pin Pin Name Function
27 35 PA11 WAKE_N
22 30 RESET_N aWire DATA
11 15 PA00 aWire DATAOUT
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3.3 Signal Descriptions
The following table gives details on signal name classified by peripheral.
Table 3-7. Signal Descriptions List
Signal Name Function Type
Active
Level Comments
Audio Bitstream DAC - ABDACB
CLK D/A Clock out Output
DAC1 - DAC0 D/A Bitstream out Output
DACN1 - DACN0 D/A Inverted bitstream out Output
Analog Comparator Interface - ACIFB
ACAN3 - ACAN0 Negative inputs for comparators "A" Analog
ACAP3 - ACAP0 Positive inputs for comparators "A" Analog
ACBN3 - ACBN0 Negative inputs for comparators "B" Analog
ACBP3 - ACBP0 Positive inputs for comparators "B" Analog
ACREFN Common negative reference Analog
ADC Interface - ADCIFB
AD8 - AD0 Analog Signal Analog
ADP1 - ADP0 Drive Pin for resistive touch screen Output
TRIGGER External trigger Input
aWire - AW
DATA aWire data I/O
DATAOUT aWire data output for 2-pin mode I/O
Capacitive Touch Module - CAT
CSA16 - CSA0 Capacitive Sense A I/O
CSB16 - CSB0 Capacitive Sense B I/O
DIS Discharge current control Analog
SMP SMP signal Output
SYNC Synchronize signal Input
VDIVEN Voltage divider enable Output
External Interrupt Controller - EIC
NMI (EXTINT0) Non-Maskable Interrupt Input
EXTINT5 - EXTINT1 External interrupt Input
Glue Logic Controller - GLOC
IN7 - IN0 Inputs to lookup tables Input
OUT1 - OUT0 Outputs from lookup tables Output
Inter-IC Sound (I2S) Controller - IISC
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IMCK I2S Master Clock Output
ISCK I2S Serial Clock I/O
ISDI I2S Serial Data In Input
ISDO I2S Serial Data Out Output
IWS I2S Word Select I/O
JTAG module - JTAG
TCK Test Clock Input
TDI Test Data In Input
TDO Test Data Out Output
TMS Test Mode Select Input
Power Manager - PM
RESET_N Reset Input Low
Pulse Width Modulation Controller - PWMA
PWMA35 - PWMA0 PWMA channel waveforms Output
PWMAOD35 -
PWMAOD0
PWMA channel waveforms, open drain
mode Output Not all channels support open
drain mode
System Control Interface - SCIF
GCLK9 - GCLK0 Generic Clock Output Output
GCLK_IN2 - GCLK_IN0 Generic Clock Input Input
RC32OUT RC32K output at startup Output
XIN0 Crystal 0 Input Analog/
Digital
XIN32 Crystal 32 Input (primary location) Analog/
Digital
XIN32_2 Crystal 32 Input (secondary location) Analog/
Digital
XOUT0 Crystal 0 Output Analog
XOUT32 Crystal 32 Output (primary location) Analog
XOUT32_2 Crystal 32 Output (secondary location) Analog
Serial Peripheral Interface - SPI
MISO Master In Slave Out I/O
MOSI Master Out Slave In I/O
NPCS3 - NPCS0 SPI Peripheral Chip Select I/O Low
SCK Clock I/O
Timer/Counter - TC0, TC1
A0 Channel 0 Line A I/O
A1 Channel 1 Line A I/O
A2 Channel 2 Line A I/O
Table 3-7. Signal Descriptions List
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Note: 1. ADCIFB: AD3 does not exist.
B0 Channel 0 Line B I/O
B1 Channel 1 Line B I/O
B2 Channel 2 Line B I/O
CLK0 Channel 0 External Clock Input Input
CLK1 Channel 1 External Clock Input Input
CLK2 Channel 2 External Clock Input Input
Two-wire Interface - TWIMS0, TWIMS1
TWALM SMBus SMBALERT I/O Low
TWCK Two-wire Serial Clock I/O
TWD Two-wire Serial Data I/O
Universal Synchronous Asynchronous Receiver Transmitter - USART0, USART1, USART2, USART3
CLK Clock I/O
CTS Clear To Send Input Low
RTS Request To Send Output Low
RXD Receive Data Input
TXD Transmit Data Output
Table 3-7. Signal Descriptions List
Table 3-8. Signal Description List, Continued
Signal Name Function Type
Active
Level Comments
Power
VDDCORE Core Power Supply / Voltage Regulator Output Power
Input/Output 1.62V to 1.98V
VDDIO I/O Power Supply Power Input
1.62V to 3.6V. VDDIO should
always be equal to or lower than
VDDIN.
VDDANA Analog Power Supply Power Input 1.62V to 1.98V
ADVREFP Analog Reference Voltage Power Input 1.62V to 1.98V
VDDIN Voltage Regulator Input Power Input 1.62V to 3.6V(1)
GNDANA Analog Ground Ground
GND Ground Ground
Auxiliary Port - AUX
MCKO Trace Data Output Clock Output
MDO5 - MDO0 Trace Data Output Output
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Note: 1. See Section 6. on page 39
3.4 I/O Line Considerations
3.4.1 JTAG Pins
The JTAG is enabled if TCK is low while the RESET_N pin is released. The TCK, TMS, and TDI
pins have pull-up resistors when JTAG is enabled. The TCK pin always has pull-up enabled during
reset. The TDO pin is an output, driven at VDDIO, and has no pull-up resistor. The JTAG
pins can be used as GPIO pins and multiplexed with peripherals when the JTAG is disabled.
Please refer to Section 3.2.3 on page 13 for the JTAG port connections.
3.4.2 PA00
Note that PA00 is multiplexed with TCK. PA00 GPIO function must only be used as output in the
application.
3.4.3 RESET_N Pin
The RESET_N pin is a schmitt input and integrates a permanent pull-up resistor to VDDIN. As
the product integrates a power-on reset detector, the RESET_N pin can be left unconnected in
case no reset from the system needs to be applied to the product.
The RESET_N pin is also used for the aWire debug protocol. When the pin is used for debugging,
it must not be driven by external circuitry.
3.4.4 TWI Pins PA21/PB04/PB05
When these pins are used for TWI, the pins are open-drain outputs with slew-rate limitation and
inputs with spike filtering. When used as GPIO pins or used for other peripherals, the pins have
the same characteristics as other GPIO pins. Selected pins are also SMBus compliant (refer to
Section on page 10). As required by the SMBus specification, these pins provide no leakage
path to ground when the ATUC64/128/256L3/4U is powered down. This allows other devices on
the SMBus to continue communicating even though the ATUC64/128/256L3/4U is not powered.
After reset a TWI function is selected on these pins instead of the GPIO. Please refer to the
GPIO Module Configuration chapter for details.
MSEO1 - MSEO0 Trace Frame Control Output
EVTI_N Event In Input Low
EVTO_N Event Out Output Low
General Purpose I/O pin
PA22 - PA00 Parallel I/O Controller I/O Port 0 I/O
PB27 - PB00 Parallel I/O Controller I/O Port 1 I/O
Table 3-8. Signal Description List, Continued
Signal Name Function Type
Active
Level Comments
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3.4.5 TWI Pins PA05/PA07/PA17
When these pins are used for TWI, the pins are open-drain outputs with slew-rate limitation and
inputs with spike filtering. When used as GPIO pins or used for other peripherals, the pins have
the same characteristics as other GPIO pins.
After reset a TWI function is selected on these pins instead of the GPIO. Please refer to the
GPIO Module Configuration chapter for details.
3.4.6 GPIO Pins
All the I/O lines integrate a pull-up resistor Programming of this pull-up resistor is performed
independently for each I/O line through the GPIO Controllers. After reset, I/O lines default as
inputs with pull-up resistors disabled, except PA00 which has the pull-up resistor enabled. PA20
selects SCIF-RC32OUT (GPIO Function F) as default enabled after reset.
3.4.7 High-drive Pins
The six pins PA02, PA06, PA08, PA09, PB01, and PB15 have high-drive output capabilities.
Refer to Section 35. on page 897 for electrical characteristics.
3.4.8 USB Pins PB13/PB14
When these pins are used for USB, the pins are behaving according to the USB specification.
When used as GPIO pins or used for other peripherals, the pins have the same behaviour as
other normal I/O pins, but the characteristics are different. Refer to Section 35. on page 897 for
electrical characteristics.
To be able to use the USB I/O the VDDIN power supply must be 3.3V nominal.
3.4.9 RC32OUT Pin
3.4.9.1 Clock output at startup
After power-up, the clock generated by the 32kHz RC oscillator (RC32K) will be output on PA20,
even when the device is still reset by the Power-On Reset Circuitry. This clock can be used by
the system to start other devices or to clock a switching regulator to rise the power supply voltage
up to an acceptable value.
The clock will be available on PA20, but will be disabled if one of the following conditions are
true:
• PA20 is configured to use a GPIO function other than F (SCIF-RC32OUT)
• PA20 is configured as a General Purpose Input/Output (GPIO)
• The bit FRC32 in the Power Manager PPCR register is written to zero (refer to the Power
Manager chapter)
The maximum amplitude of the clock signal will be defined by VDDIN.
Once the RC32K output on PA20 is disabled it can never be enabled again.
3.4.9.2 XOUT32_2 function
PA20 selects RC32OUT as default enabled after reset. This function is not automatically disabled
when the user enables the XOUT32_2 function on PA20. This disturbs the oscillator and
may result in the wrong frequency. To avoid this, RC32OUT must be disabled when XOUT32_2
is enabled.
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3.4.10 ADC Input Pins
These pins are regular I/O pins powered from the VDDIO. However, when these pins are used
for ADC inputs, the voltage applied to the pin must not exceed 1.98V. Internal circuitry ensures
that the pin cannot be used as an analog input pin when the I/O drives to VDD. When the pins
are not used for ADC inputs, the pins may be driven to the full I/O voltage range.
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4. Processor and Architecture
Rev: 2.1.2.0
This chapter gives an overview of the AVR32UC CPU. AVR32UC is an implementation of the
AVR32 architecture. A summary of the programming model, instruction set, and MPU is presented.
For further details, see the AVR32 Architecture Manual and the AVR32UC Technical
Reference Manual.
4.1 Features
• 32-bit load/store AVR32A RISC architecture
– 15 general-purpose 32-bit registers
– 32-bit Stack Pointer, Program Counter and Link Register reside in register file
– Fully orthogonal instruction set
– Privileged and unprivileged modes enabling efficient and secure operating systems
– Innovative instruction set together with variable instruction length ensuring industry leading
code density
– DSP extension with saturating arithmetic, and a wide variety of multiply instructions
• 3-stage pipeline allowing one instruction per clock cycle for most instructions
– Byte, halfword, word, and double word memory access
– Multiple interrupt priority levels
• MPU allows for operating systems with memory protection
• Secure State for supporting FlashVault technology
4.2 AVR32 Architecture
AVR32 is a new, high-performance 32-bit RISC microprocessor architecture, designed for costsensitive
embedded applications, with particular emphasis on low power consumption and high
code density. In addition, the instruction set architecture has been tuned to allow a variety of
microarchitectures, enabling the AVR32 to be implemented as low-, mid-, or high-performance
processors. AVR32 extends the AVR family into the world of 32- and 64-bit applications.
Through a quantitative approach, a large set of industry recognized benchmarks has been compiled
and analyzed to achieve the best code density in its class. In addition to lowering the
memory requirements, a compact code size also contributes to the core’s low power characteristics.
The processor supports byte and halfword data types without penalty in code size and
performance.
Memory load and store operations are provided for byte, halfword, word, and double word data
with automatic sign- or zero extension of halfword and byte data. The C-compiler is closely
linked to the architecture and is able to exploit code optimization features, both for size and
speed.
In order to reduce code size to a minimum, some instructions have multiple addressing modes.
As an example, instructions with immediates often have a compact format with a smaller immediate,
and an extended format with a larger immediate. In this way, the compiler is able to use
the format giving the smallest code size.
Another feature of the instruction set is that frequently used instructions, like add, have a compact
format with two operands as well as an extended format with three operands. The larger
format increases performance, allowing an addition and a data move in the same instruction in a
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single cycle. Load and store instructions have several different formats in order to reduce code
size and speed up execution.
The register file is organized as sixteen 32-bit registers and includes the Program Counter, the
Link Register, and the Stack Pointer. In addition, register R12 is designed to hold return values
from function calls and is used implicitly by some instructions.
4.3 The AVR32UC CPU
The AVR32UC CPU targets low- and medium-performance applications, and provides an
advanced On-Chip Debug (OCD) system, no caches, and a Memory Protection Unit (MPU).
Java acceleration hardware is not implemented.
AVR32UC provides three memory interfaces, one High Speed Bus master for instruction fetch,
one High Speed Bus master for data access, and one High Speed Bus slave interface allowing
other bus masters to access data RAMs internal to the CPU. Keeping data RAMs internal to the
CPU allows fast access to the RAMs, reduces latency, and guarantees deterministic timing.
Also, power consumption is reduced by not needing a full High Speed Bus access for memory
accesses. A dedicated data RAM interface is provided for communicating with the internal data
RAMs.
A local bus interface is provided for connecting the CPU to device-specific high-speed systems,
such as floating-point units and I/O controller ports. This local bus has to be enabled by writing a
one to the LOCEN bit in the CPUCR system register. The local bus is able to transfer data
between the CPU and the local bus slave in a single clock cycle. The local bus has a dedicated
memory range allocated to it, and data transfers are performed using regular load and store
instructions. Details on which devices that are mapped into the local bus space is given in the
CPU Local Bus section in the Memories chapter.
Figure 4-1 on page 23 displays the contents of AVR32UC.
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Figure 4-1. Overview of the AVR32UC CPU
4.3.1 Pipeline Overview
AVR32UC has three pipeline stages, Instruction Fetch (IF), Instruction Decode (ID), and Instruction
Execute (EX). The EX stage is split into three parallel subsections, one arithmetic/logic
(ALU) section, one multiply (MUL) section, and one load/store (LS) section.
Instructions are issued and complete in order. Certain operations require several clock cycles to
complete, and in this case, the instruction resides in the ID and EX stages for the required number
of clock cycles. Since there is only three pipeline stages, no internal data forwarding is
required, and no data dependencies can arise in the pipeline.
Figure 4-2 on page 24 shows an overview of the AVR32UC pipeline stages.
AVR32UC CPU pipeline
Instruction memory controller
MPU
High Speed Bus
High Speed Bus
OCD
systemOCD interface
Interrupt controller interface
High
Speed
Bus slave High Speed Bus
High Speed Bus master
Power/
Reset
control Reset interface
CPU Local
Bus
master CPU Local Bus
Data memory controller
CPU RAM High Speed
Bus master
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Figure 4-2. The AVR32UC Pipeline
4.3.2 AVR32A Microarchitecture Compliance
AVR32UC implements an AVR32A microarchitecture. The AVR32A microarchitecture is targeted
at cost-sensitive, lower-end applications like smaller microcontrollers. This
microarchitecture does not provide dedicated hardware registers for shadowing of register file
registers in interrupt contexts. Additionally, it does not provide hardware registers for the return
address registers and return status registers. Instead, all this information is stored on the system
stack. This saves chip area at the expense of slower interrupt handling.
4.3.2.1 Interrupt Handling
Upon interrupt initiation, registers R8-R12 are automatically pushed to the system stack. These
registers are pushed regardless of the priority level of the pending interrupt. The return address
and status register are also automatically pushed to stack. The interrupt handler can therefore
use R8-R12 freely. Upon interrupt completion, the old R8-R12 registers and status register are
restored, and execution continues at the return address stored popped from stack.
The stack is also used to store the status register and return address for exceptions and scall.
Executing the rete or rets instruction at the completion of an exception or system call will pop
this status register and continue execution at the popped return address.
4.3.2.2 Java Support
AVR32UC does not provide Java hardware acceleration.
4.3.2.3 Memory Protection
The MPU allows the user to check all memory accesses for privilege violations. If an access is
attempted to an illegal memory address, the access is aborted and an exception is taken. The
MPU in AVR32UC is specified in the AVR32UC Technical Reference manual.
4.3.2.4 Unaligned Reference Handling
AVR32UC does not support unaligned accesses, except for doubleword accesses. AVR32UC is
able to perform word-aligned st.d and ld.d. Any other unaligned memory access will cause an
IF ID ALU
MUL
Regfile
write
Prefetch unit Decode unit
ALU unit
Multiply unit
Load-store
unit LS
Regfile
Read
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address exception. Doubleword-sized accesses with word-aligned pointers will automatically be
performed as two word-sized accesses.
The following table shows the instructions with support for unaligned addresses. All other
instructions require aligned addresses.
4.3.2.5 Unimplemented Instructions
The following instructions are unimplemented in AVR32UC, and will cause an Unimplemented
Instruction Exception if executed:
• All SIMD instructions
• All coprocessor instructions if no coprocessors are present
• retj, incjosp, popjc, pushjc
• tlbr, tlbs, tlbw
• cache
4.3.2.6 CPU and Architecture Revision
Three major revisions of the AVR32UC CPU currently exist. The device described in this
datasheet uses CPU revision 3.
The Architecture Revision field in the CONFIG0 system register identifies which architecture
revision is implemented in a specific device.
AVR32UC CPU revision 3 is fully backward-compatible with revisions 1 and 2, ie. code compiled
for revision 1 or 2 is binary-compatible with revision 3 CPUs.
Table 4-1. Instructions with Unaligned Reference Support
Instruction Supported Alignment
ld.d Word
st.d Word
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4.4 Programming Model
4.4.1 Register File Configuration
The AVR32UC register file is shown below.
Figure 4-3. The AVR32UC Register File
4.4.2 Status Register Configuration
The Status Register (SR) is split into two halfwords, one upper and one lower, see Figure 4-4
and Figure 4-5. The lower word contains the C, Z, N, V, and Q condition code flags and the R, T,
and L bits, while the upper halfword contains information about the mode and state the processor
executes in. Refer to the AVR32 Architecture Manual for details.
Figure 4-4. The Status Register High Halfword
Application
Bit 0
Supervisor
Bit 31
PC
SR
INT0PC
FINTPC
INT1PC
SMPC
R7
R5
R6
R4
R3
R1
R2
R0
Bit 31 Bit 0
PC
SR
R12
INT0PC
FINTPC
INT1PC
SMPC
R7
R5
R6
R4
R11
R9
R10
R8
R3
R1
R2
R0
INT0
SP_APP SP_SYS
R12
R11
R9
R10
R8
INT1 INT2 INT3 Exception NMI
LR LR
Bit 31 Bit 0
PC
SR
R12
INT0PC
FINTPC
INT1PC
SMPC
R7
R5
R6
R4
R11
R9
R10
R8
R3
R1
R2
R0
SP_SYS
LR
Bit 31 Bit 0
PC
SR
R12
INT0PC
FINTPC
INT1PC
SMPC
R7
R5
R6
R4
R11
R9
R10
R8
R3
R1
R2
R0
SP_SYS
LR
Bit 31 Bit 0
PC
SR
R12
INT0PC
FINTPC
INT1PC
SMPC
R7
R5
R6
R4
R11
R9
R10
R8
R3
R1
R2
R0
SP_SYS
LR
Bit 31 Bit 0
PC
SR
R12
INT0PC
FINTPC
INT1PC
SMPC
R7
R5
R6
R4
R11
R9
R10
R8
R3
R1
R2
R0
SP_SYS
LR
Bit 31 Bit 0
PC
SR
R12
INT0PC
FINTPC
INT1PC
SMPC
R7
R5
R6
R4
R11
R9
R10
R8
R3
R1
R2
R0
SP_SYS
LR
Bit 31 Bit 0
PC
SR
R12
INT0PC
FINTPC
INT1PC
SMPC
R7
R5
R6
R4
R11
R9
R10
R8
R3
R1
R2
R0
SP_SYS
LR
Secure
Bit 31 Bit 0
PC
SR
R12
INT0PC
FINTPC
INT1PC
SMPC
R7
R5
R6
R4
R11
R9
R10
R8
R3
R1
R2
R0
SP_SEC
LR
SS_STATUS
SS_ADRF
SS_ADRR
SS_ADR0
SS_ADR1
SS_SP_SYS
SS_SP_APP
SS_RAR
SS_RSR
Bit 31
0 0 0
Bit 16
Interrupt Level 0 Mask
Interrupt Level 1 Mask
Interrupt Level 3 Mask
Interrupt Level 2 Mask
0 0 0 0 0 0 1 1 0 0 0 0 1
- DM D - M2 M1 M0 EM I2MFE I0M GM LC
1 SS
Initial value
I1M Bit name
Mode Bit 0
Mode Bit 1
-
Mode Bit 2
Reserved
Debug State
- I3M
Reserved
Exception Mask
Global Interrupt Mask
Debug State Mask
Secure State
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Figure 4-5. The Status Register Low Halfword
4.4.3 Processor States
4.4.3.1 Normal RISC State
The AVR32 processor supports several different execution contexts as shown in Table 4-2.
Mode changes can be made under software control, or can be caused by external interrupts or
exception processing. A mode can be interrupted by a higher priority mode, but never by one
with lower priority. Nested exceptions can be supported with a minimal software overhead.
When running an operating system on the AVR32, user processes will typically execute in the
application mode. The programs executed in this mode are restricted from executing certain
instructions. Furthermore, most system registers together with the upper halfword of the status
register cannot be accessed. Protected memory areas are also not available. All other operating
modes are privileged and are collectively called System Modes. They have full access to all privileged
and unprivileged resources. After a reset, the processor will be in supervisor mode.
4.4.3.2 Debug State
The AVR32 can be set in a debug state, which allows implementation of software monitor routines
that can read out and alter system information for use during application development. This
implies that all system and application registers, including the status registers and program
counters, are accessible in debug state. The privileged instructions are also available.
All interrupt levels are by default disabled when debug state is entered, but they can individually
be switched on by the monitor routine by clearing the respective mask bit in the status register.
Bit 15 Bit 0
Reserved
Carry
Zero
Sign
0 0 0 0 0 0 0 0 0 0 0 0 0 0
- T - - - - Bit name
0 0 Initial value
- L Q V N Z C
Overflow
Saturation
- - -
Lock
Reserved
Scratch
Table 4-2. Overview of Execution Modes, their Priorities and Privilege Levels.
Priority Mode Security Description
1 Non Maskable Interrupt Privileged Non Maskable high priority interrupt mode
2 Exception Privileged Execute exceptions
3 Interrupt 3 Privileged General purpose interrupt mode
4 Interrupt 2 Privileged General purpose interrupt mode
5 Interrupt 1 Privileged General purpose interrupt mode
6 Interrupt 0 Privileged General purpose interrupt mode
N/A Supervisor Privileged Runs supervisor calls
N/A Application Unprivileged Normal program execution mode
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Debug state can be entered as described in the AVR32UC Technical Reference Manual.
Debug state is exited by the retd instruction.
4.4.3.3 Secure State
The AVR32 can be set in a secure state, that allows a part of the code to execute in a state with
higher security levels. The rest of the code can not access resources reserved for this secure
code. Secure State is used to implement FlashVault technology. Refer to the AVR32UC Technical
Reference Manual for details.
4.4.4 System Registers
The system registers are placed outside of the virtual memory space, and are only accessible
using the privileged mfsr and mtsr instructions. The table below lists the system registers specified
in the AVR32 architecture, some of which are unused in AVR32UC. The programmer is
responsible for maintaining correct sequencing of any instructions following a mtsr instruction.
For detail on the system registers, refer to the AVR32UC Technical Reference Manual.
Table 4-3. System Registers
Reg # Address Name Function
0 0 SR Status Register
1 4 EVBA Exception Vector Base Address
2 8 ACBA Application Call Base Address
3 12 CPUCR CPU Control Register
4 16 ECR Exception Cause Register
5 20 RSR_SUP Unused in AVR32UC
6 24 RSR_INT0 Unused in AVR32UC
7 28 RSR_INT1 Unused in AVR32UC
8 32 RSR_INT2 Unused in AVR32UC
9 36 RSR_INT3 Unused in AVR32UC
10 40 RSR_EX Unused in AVR32UC
11 44 RSR_NMI Unused in AVR32UC
12 48 RSR_DBG Return Status Register for Debug mode
13 52 RAR_SUP Unused in AVR32UC
14 56 RAR_INT0 Unused in AVR32UC
15 60 RAR_INT1 Unused in AVR32UC
16 64 RAR_INT2 Unused in AVR32UC
17 68 RAR_INT3 Unused in AVR32UC
18 72 RAR_EX Unused in AVR32UC
19 76 RAR_NMI Unused in AVR32UC
20 80 RAR_DBG Return Address Register for Debug mode
21 84 JECR Unused in AVR32UC
22 88 JOSP Unused in AVR32UC
23 92 JAVA_LV0 Unused in AVR32UC
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24 96 JAVA_LV1 Unused in AVR32UC
25 100 JAVA_LV2 Unused in AVR32UC
26 104 JAVA_LV3 Unused in AVR32UC
27 108 JAVA_LV4 Unused in AVR32UC
28 112 JAVA_LV5 Unused in AVR32UC
29 116 JAVA_LV6 Unused in AVR32UC
30 120 JAVA_LV7 Unused in AVR32UC
31 124 JTBA Unused in AVR32UC
32 128 JBCR Unused in AVR32UC
33-63 132-252 Reserved Reserved for future use
64 256 CONFIG0 Configuration register 0
65 260 CONFIG1 Configuration register 1
66 264 COUNT Cycle Counter register
67 268 COMPARE Compare register
68 272 TLBEHI Unused in AVR32UC
69 276 TLBELO Unused in AVR32UC
70 280 PTBR Unused in AVR32UC
71 284 TLBEAR Unused in AVR32UC
72 288 MMUCR Unused in AVR32UC
73 292 TLBARLO Unused in AVR32UC
74 296 TLBARHI Unused in AVR32UC
75 300 PCCNT Unused in AVR32UC
76 304 PCNT0 Unused in AVR32UC
77 308 PCNT1 Unused in AVR32UC
78 312 PCCR Unused in AVR32UC
79 316 BEAR Bus Error Address Register
80 320 MPUAR0 MPU Address Register region 0
81 324 MPUAR1 MPU Address Register region 1
82 328 MPUAR2 MPU Address Register region 2
83 332 MPUAR3 MPU Address Register region 3
84 336 MPUAR4 MPU Address Register region 4
85 340 MPUAR5 MPU Address Register region 5
86 344 MPUAR6 MPU Address Register region 6
87 348 MPUAR7 MPU Address Register region 7
88 352 MPUPSR0 MPU Privilege Select Register region 0
89 356 MPUPSR1 MPU Privilege Select Register region 1
Table 4-3. System Registers (Continued)
Reg # Address Name Function
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4.5 Exceptions and Interrupts
In the AVR32 architecture, events are used as a common term for exceptions and interrupts.
AVR32UC incorporates a powerful event handling scheme. The different event sources, like Illegal
Op-code and interrupt requests, have different priority levels, ensuring a well-defined
behavior when multiple events are received simultaneously. Additionally, pending events of a
higher priority class may preempt handling of ongoing events of a lower priority class.
When an event occurs, the execution of the instruction stream is halted, and execution is passed
to an event handler at an address specified in Table 4-4 on page 34. Most of the handlers are
placed sequentially in the code space starting at the address specified by EVBA, with four bytes
between each handler. This gives ample space for a jump instruction to be placed there, jumping
to the event routine itself. A few critical handlers have larger spacing between them, allowing
the entire event routine to be placed directly at the address specified by the EVBA-relative offset
generated by hardware. All interrupt sources have autovectored interrupt service routine (ISR)
addresses. This allows the interrupt controller to directly specify the ISR address as an address
90 360 MPUPSR2 MPU Privilege Select Register region 2
91 364 MPUPSR3 MPU Privilege Select Register region 3
92 368 MPUPSR4 MPU Privilege Select Register region 4
93 372 MPUPSR5 MPU Privilege Select Register region 5
94 376 MPUPSR6 MPU Privilege Select Register region 6
95 380 MPUPSR7 MPU Privilege Select Register region 7
96 384 MPUCRA Unused in this version of AVR32UC
97 388 MPUCRB Unused in this version of AVR32UC
98 392 MPUBRA Unused in this version of AVR32UC
99 396 MPUBRB Unused in this version of AVR32UC
100 400 MPUAPRA MPU Access Permission Register A
101 404 MPUAPRB MPU Access Permission Register B
102 408 MPUCR MPU Control Register
103 412 SS_STATUS Secure State Status Register
104 416 SS_ADRF Secure State Address Flash Register
105 420 SS_ADRR Secure State Address RAM Register
106 424 SS_ADR0 Secure State Address 0 Register
107 428 SS_ADR1 Secure State Address 1 Register
108 432 SS_SP_SYS Secure State Stack Pointer System Register
109 436 SS_SP_APP Secure State Stack Pointer Application Register
110 440 SS_RAR Secure State Return Address Register
111 444 SS_RSR Secure State Return Status Register
112-191 448-764 Reserved Reserved for future use
192-255 768-1020 IMPL IMPLEMENTATION DEFINED
Table 4-3. System Registers (Continued)
Reg # Address Name Function
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relative to EVBA. The autovector offset has 14 address bits, giving an offset of maximum 16384
bytes. The target address of the event handler is calculated as (EVBA | event_handler_offset),
not (EVBA + event_handler_offset), so EVBA and exception code segments must be set up
appropriately. The same mechanisms are used to service all different types of events, including
interrupt requests, yielding a uniform event handling scheme.
An interrupt controller does the priority handling of the interrupts and provides the autovector offset
to the CPU.
4.5.1 System Stack Issues
Event handling in AVR32UC uses the system stack pointed to by the system stack pointer,
SP_SYS, for pushing and popping R8-R12, LR, status register, and return address. Since event
code may be timing-critical, SP_SYS should point to memory addresses in the IRAM section,
since the timing of accesses to this memory section is both fast and deterministic.
The user must also make sure that the system stack is large enough so that any event is able to
push the required registers to stack. If the system stack is full, and an event occurs, the system
will enter an UNDEFINED state.
4.5.2 Exceptions and Interrupt Requests
When an event other than scall or debug request is received by the core, the following actions
are performed atomically:
1. The pending event will not be accepted if it is masked. The I3M, I2M, I1M, I0M, EM, and
GM bits in the Status Register are used to mask different events. Not all events can be
masked. A few critical events (NMI, Unrecoverable Exception, TLB Multiple Hit, and
Bus Error) can not be masked. When an event is accepted, hardware automatically
sets the mask bits corresponding to all sources with equal or lower priority. This inhibits
acceptance of other events of the same or lower priority, except for the critical events
listed above. Software may choose to clear some or all of these bits after saving the
necessary state if other priority schemes are desired. It is the event source’s responsability
to ensure that their events are left pending until accepted by the CPU.
2. When a request is accepted, the Status Register and Program Counter of the current
context is stored to the system stack. If the event is an INT0, INT1, INT2, or INT3, registers
R8-R12 and LR are also automatically stored to stack. Storing the Status
Register ensures that the core is returned to the previous execution mode when the
current event handling is completed. When exceptions occur, both the EM and GM bits
are set, and the application may manually enable nested exceptions if desired by clearing
the appropriate bit. Each exception handler has a dedicated handler address, and
this address uniquely identifies the exception source.
3. The Mode bits are set to reflect the priority of the accepted event, and the correct register
file bank is selected. The address of the event handler, as shown in Table 4-4 on
page 34, is loaded into the Program Counter.
The execution of the event handler routine then continues from the effective address calculated.
The rete instruction signals the end of the event. When encountered, the Return Status Register
and Return Address Register are popped from the system stack and restored to the Status Register
and Program Counter. If the rete instruction returns from INT0, INT1, INT2, or INT3,
registers R8-R12 and LR are also popped from the system stack. The restored Status Register
contains information allowing the core to resume operation in the previous execution mode. This
concludes the event handling.
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4.5.3 Supervisor Calls
The AVR32 instruction set provides a supervisor mode call instruction. The scall instruction is
designed so that privileged routines can be called from any context. This facilitates sharing of
code between different execution modes. The scall mechanism is designed so that a minimal
execution cycle overhead is experienced when performing supervisor routine calls from timecritical
event handlers.
The scall instruction behaves differently depending on which mode it is called from. The behaviour
is detailed in the instruction set reference. In order to allow the scall routine to return to the
correct context, a return from supervisor call instruction, rets, is implemented. In the AVR32UC
CPU, scall and rets uses the system stack to store the return address and the status register.
4.5.4 Debug Requests
The AVR32 architecture defines a dedicated Debug mode. When a debug request is received by
the core, Debug mode is entered. Entry into Debug mode can be masked by the DM bit in the
status register. Upon entry into Debug mode, hardware sets the SR.D bit and jumps to the
Debug Exception handler. By default, Debug mode executes in the exception context, but with
dedicated Return Address Register and Return Status Register. These dedicated registers
remove the need for storing this data to the system stack, thereby improving debuggability. The
Mode bits in the Status Register can freely be manipulated in Debug mode, to observe registers
in all contexts, while retaining full privileges.
Debug mode is exited by executing the retd instruction. This returns to the previous context.
4.5.5 Entry Points for Events
Several different event handler entry points exist. In AVR32UC, the reset address is
0x80000000. This places the reset address in the boot flash memory area.
TLB miss exceptions and scall have a dedicated space relative to EVBA where their event handler
can be placed. This speeds up execution by removing the need for a jump instruction placed
at the program address jumped to by the event hardware. All other exceptions have a dedicated
event routine entry point located relative to EVBA. The handler routine address identifies the
exception source directly.
AVR32UC uses the ITLB and DTLB protection exceptions to signal a MPU protection violation.
ITLB and DTLB miss exceptions are used to signal that an access address did not map to any of
the entries in the MPU. TLB multiple hit exception indicates that an access address did map to
multiple TLB entries, signalling an error.
All interrupt requests have entry points located at an offset relative to EVBA. This autovector offset
is specified by an interrupt controller. The programmer must make sure that none of the
autovector offsets interfere with the placement of other code. The autovector offset has 14
address bits, giving an offset of maximum 16384 bytes.
Special considerations should be made when loading EVBA with a pointer. Due to security considerations,
the event handlers should be located in non-writeable flash memory, or optionally in
a privileged memory protection region if an MPU is present.
If several events occur on the same instruction, they are handled in a prioritized way. The priority
ordering is presented in Table 4-4 on page 34. If events occur on several instructions at different
locations in the pipeline, the events on the oldest instruction are always handled before any
events on any younger instruction, even if the younger instruction has events of higher priority
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than the oldest instruction. An instruction B is younger than an instruction A if it was sent down
the pipeline later than A.
The addresses and priority of simultaneous events are shown in Table 4-4 on page 34. Some of
the exceptions are unused in AVR32UC since it has no MMU, coprocessor interface, or floatingpoint
unit.
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Table 4-4. Priority and Handler Addresses for Events
Priority Handler Address Name Event source Stored Return Address
1 0x80000000 Reset External input Undefined
2 Provided by OCD system OCD Stop CPU OCD system First non-completed instruction
3 EVBA+0x00 Unrecoverable exception Internal PC of offending instruction
4 EVBA+0x04 TLB multiple hit MPU PC of offending instruction
5 EVBA+0x08 Bus error data fetch Data bus First non-completed instruction
6 EVBA+0x0C Bus error instruction fetch Data bus First non-completed instruction
7 EVBA+0x10 NMI External input First non-completed instruction
8 Autovectored Interrupt 3 request External input First non-completed instruction
9 Autovectored Interrupt 2 request External input First non-completed instruction
10 Autovectored Interrupt 1 request External input First non-completed instruction
11 Autovectored Interrupt 0 request External input First non-completed instruction
12 EVBA+0x14 Instruction Address CPU PC of offending instruction
13 EVBA+0x50 ITLB Miss MPU PC of offending instruction
14 EVBA+0x18 ITLB Protection MPU PC of offending instruction
15 EVBA+0x1C Breakpoint OCD system First non-completed instruction
16 EVBA+0x20 Illegal Opcode Instruction PC of offending instruction
17 EVBA+0x24 Unimplemented instruction Instruction PC of offending instruction
18 EVBA+0x28 Privilege violation Instruction PC of offending instruction
19 EVBA+0x2C Floating-point UNUSED
20 EVBA+0x30 Coprocessor absent Instruction PC of offending instruction
21 EVBA+0x100 Supervisor call Instruction PC(Supervisor Call) +2
22 EVBA+0x34 Data Address (Read) CPU PC of offending instruction
23 EVBA+0x38 Data Address (Write) CPU PC of offending instruction
24 EVBA+0x60 DTLB Miss (Read) MPU PC of offending instruction
25 EVBA+0x70 DTLB Miss (Write) MPU PC of offending instruction
26 EVBA+0x3C DTLB Protection (Read) MPU PC of offending instruction
27 EVBA+0x40 DTLB Protection (Write) MPU PC of offending instruction
28 EVBA+0x44 DTLB Modified UNUSED
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5. Memories
5.1 Embedded Memories
• Internal high-speed flash
– 256Kbytes (ATUC256L3U, ATUC256L4U)
– 128Kbytes (ATUC128L3U, ATUC128L4U)
– 64Kbytes (ATUC64L3U, ATUC64L4U)
• 0 wait state access at up to 25MHz in worst case conditions
• 1 wait state access at up to 50MHz in worst case conditions
• Pipelined flash architecture, allowing burst reads from sequential flash locations, hiding
penalty of 1 wait state access
• Pipelined flash architecture typically reduces the cycle penalty of 1 wait state operation
to only 8% compared to 0 wait state operation
• 100 000 write cycles, 15-year data retention capability
• Sector lock capabilities, bootloader protection, security bit
• 32 fuses, erased during chip erase
• User page for data to be preserved during chip erase
• Internal high-speed SRAM, single-cycle access at full speed
– 32Kbytes (ATUC256L3U, ATUC256L4U, ATUC128L3U, ATUC128L4U)
– 16Kbytes (ATUC64L3U, ATUC64L4U)
5.2 Physical Memory Map
The system bus is implemented as a bus matrix. All system bus addresses are fixed, and they
are never remapped in any way, not even during boot. Note that AVR32 UC CPU uses unsegmented
translation, as described in the AVR32 Architecture Manual. The 32-bit physical address
space is mapped as follows:
Table 5-1. ATUC64/128/256L3/4U Physical Memory Map
Memory Start Address
Size
ATUC256L3U, ATUC256L4U ATUC128L3U, ATUC128L4U ATUC64L3U, ATUC64L4U
Embedded SRAM 0x00000000 32Kbytes 32Kbytes 16Kbytes
Embedded Flash 0x80000000 256Kbytes 128Kbytes 64Kbytes
SAU Channels 0x90000000 256 bytes 256 bytes 256 bytes
HSB-PB Bridge B 0xFFFE0000 64Kbytes 64Kbytes 64Kbytes
HSB-PB Bridge A 0xFFFF0000 64Kbytes 64Kbytes 64Kbytes
Table 5-2. Flash Memory Parameters
Device Flash Size (FLASH_PW) Number of Pages (FLASH_P) Page Size (FLASH_W)
ATUC256L3U,
ATUC256L4U 256Kbytes 512 512 bytes
ATUC128L3U,
ATUC128L4U 128Kbytes 256 512 bytes
ATUC64L3U,
ATUC64L4U 64Kbytes 128 512 bytes
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5.3 Peripheral Address Map
Table 5-3. Peripheral Address Mapping
Address Peripheral Name
0xFFFE0000
FLASHCDW Flash Controller - FLASHCDW
0xFFFE0400
HMATRIX HSB Matrix - HMATRIX
0xFFFE0800
SAU Secure Access Unit - SAU
0xFFFE1000
USBC USB 2.0 Interface - USBC
0xFFFF0000
PDCA Peripheral DMA Controller - PDCA
0xFFFF1000
INTC Interrupt controller - INTC
0xFFFF1400
PM Power Manager - PM
0xFFFF1800
SCIF System Control Interface - SCIF
0xFFFF1C00
AST Asynchronous Timer - AST
0xFFFF2000
WDT Watchdog Timer - WDT
0xFFFF2400
EIC External Interrupt Controller - EIC
0xFFFF2800
FREQM Frequency Meter - FREQM
0xFFFF2C00
GPIO General-Purpose Input/Output Controller - GPIO
0xFFFF3000
USART0 Universal Synchronous Asynchronous Receiver
Transmitter - USART0
0xFFFF3400
USART1 Universal Synchronous Asynchronous Receiver
Transmitter - USART1
0xFFFF3800
USART2 Universal Synchronous Asynchronous Receiver
Transmitter - USART2
0xFFFF3C00
USART3 Universal Synchronous Asynchronous Receiver
Transmitter - USART3
0xFFFF4000
SPI Serial Peripheral Interface - SPI
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5.4 CPU Local Bus Mapping
Some of the registers in the GPIO module are mapped onto the CPU local bus, in addition to
being mapped on the Peripheral Bus. These registers can therefore be reached both by
accesses on the Peripheral Bus, and by accesses on the local bus.
Mapping these registers on the local bus allows cycle-deterministic toggling of GPIO pins since
the CPU and GPIO are the only modules connected to this bus. Also, since the local bus runs at
CPU speed, one write or read operation can be performed per clock cycle to the local busmapped
GPIO registers.
0xFFFF4400
TWIM0 Two-wire Master Interface - TWIM0
0xFFFF4800
TWIM1 Two-wire Master Interface - TWIM1
0xFFFF4C00
TWIS0 Two-wire Slave Interface - TWIS0
0xFFFF5000
TWIS1 Two-wire Slave Interface - TWIS1
0xFFFF5400
PWMA Pulse Width Modulation Controller - PWMA
0xFFFF5800
TC0 Timer/Counter - TC0
0xFFFF5C00
TC1 Timer/Counter - TC1
0xFFFF6000
ADCIFB ADC Interface - ADCIFB
0xFFFF6400
ACIFB Analog Comparator Interface - ACIFB
0xFFFF6800
CAT Capacitive Touch Module - CAT
0xFFFF6C00
GLOC Glue Logic Controller - GLOC
0xFFFF7000
AW aWire - AW
0xFFFF7400
ABDACB Audio Bitstream DAC - ABDACB
0xFFFF7800
IISC Inter-IC Sound (I2S) Controller - IISC
Table 5-3. Peripheral Address Mapping
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The following GPIO registers are mapped on the local bus:
Table 5-4. Local Bus Mapped GPIO Registers
Port Register Mode
Local Bus
Address Access
0 Output Driver Enable Register (ODER) WRITE 0x40000040 Write-only
SET 0x40000044 Write-only
CLEAR 0x40000048 Write-only
TOGGLE 0x4000004C Write-only
Output Value Register (OVR) WRITE 0x40000050 Write-only
SET 0x40000054 Write-only
CLEAR 0x40000058 Write-only
TOGGLE 0x4000005C Write-only
Pin Value Register (PVR) - 0x40000060 Read-only
1 Output Driver Enable Register (ODER) WRITE 0x40000140 Write-only
SET 0x40000144 Write-only
CLEAR 0x40000148 Write-only
TOGGLE 0x4000014C Write-only
Output Value Register (OVR) WRITE 0x40000150 Write-only
SET 0x40000154 Write-only
CLEAR 0x40000158 Write-only
TOGGLE 0x4000015C Write-only
Pin Value Register (PVR) - 0x40000160 Read-only
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6. Supply and Startup Considerations
6.1 Supply Considerations
6.1.1 Power Supplies
The ATUC64/128/256L3/4U has several types of power supply pins:
• VDDIO: Powers I/O lines. Voltage is 1.8 to 3.3V nominal.
• VDDIN: Powers I/O lines, the USB pins, and the internal regulator. Voltage is 1.8 to 3.3V
nominal if USB is not used, and 3.3V nominal when USB is used.
• VDDANA: Powers the ADC. Voltage is 1.8V nominal.
• VDDCORE: Powers the core, memories, and peripherals. Voltage is 1.8V nominal.
The ground pins GND are common to VDDCORE, VDDIO, and VDDIN. The ground pin for
VDDANA is GNDANA.
When VDDCORE is not connected to VDDIN, the VDDIN voltage must be higher than 1.98V.
Refer to Section 35. on page 897 for power consumption on the various supply pins.
For decoupling recommendations for the different power supplies, please refer to the schematic
checklist.
Refer to Section on page 10 for power supply connections for I/O pins.
6.1.2 Voltage Regulator
The ATUC64/128/256L3/4U embeds a voltage regulator that converts from 3.3V nominal to
1.8V with a load of up to 60 mA. The regulator supplies the output voltage on VDDCORE. The
regulator may only be used to drive internal circuitry in the device. VDDCORE should be externally
connected to the 1.8V domains. See Section 6.1.3 for regulator connection figures.
Adequate output supply decoupling is mandatory for VDDCORE to reduce ripple and avoid
oscillations. The best way to achieve this is to use two capacitors in parallel between VDDCORE
and GND as close to the device as possible. Please refer to Section 35.8 on page 911 for
decoupling capacitors values and regulator characteristics.
Figure 6-1. Supply Decoupling.
The voltage regulator can be turned off in the shutdown mode to power down the core logic and
keep a small part of the system powered in order to reduce power consumption. To enter this
mode the 3.3V supply mode, with 1.8V regulated I/O lines power supply configuration must be
used.
3.3V
1.8V
VDDIN
VDDCORE
1.8V
Regulator
CIN1
COUT1 COUT2
C IN3 IN2 C
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6.1.3 Regulator Connection
The ATUC64/128/256L3/4U supports three power supply configurations:
• 3.3V single supply mode
– Shutdown mode is not available
• 1.8V single supply mode
– Shutdown mode is not available
• 3.3V supply mode, with 1.8V regulated I/O lines
– Shutdown mode is available
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6.1.3.1 3.3V Single Supply Mode
In 3.3V single supply mode the internal regulator is connected to the 3.3V source (VDDIN pin)
and its output feeds VDDCORE. Figure 6-2 shows the power schematics to be used for 3.3V
single supply mode. All I/O lines will be powered by the same power (VDDIN=VDDIO).
Figure 6-2. 3.3V Single Supply Mode
VDDIO
VDDCORE
+
- 1.98-3.6V
VDDANA ADC
VDDIN GND
GNDANA
CPU,
Peripherals,
Memories,
SCIF, BOD,
RCSYS,
DFLL, PLL
OSC32K,
RC32K,
POR33,
SM33
I/O Pins I/O Pins
OSC32K_2,
AST, Wake,
Regulator
control
Linear
regulator
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6.1.3.2 1.8V Single Supply Mode
In 1.8V single supply mode the internal regulator is not used, and VDDIO and VDDCORE are
powered by a single 1.8V supply as shown in Figure 6-3. All I/O lines will be powered by the
same power (VDDIN = VDDIO = VDDCORE).
Figure 6-3. 1.8V Single Supply Mode
VDDIO
VDDCORE
+
-
1.62-1.98V
VDDANA ADC
VDDIN GND
GNDANA
CPU,
Peripherals,
Memories,
SCIF, BOD,
RCSYS,
DFLL, PLL
OSC32K,
RC32K,
POR33,
SM33
I/O Pins I/O Pins
OSC32K_2,
AST, Wake,
Regulator
control
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6.1.3.3 3.3V Supply Mode with 1.8V Regulated I/O Lines
In this mode, the internal regulator is connected to the 3.3V source and its output is connected
to both VDDCORE and VDDIO as shown in Figure 6-4. This configuration is required in order to
use Shutdown mode.
Figure 6-4. 3.3V Supply Mode with 1.8V Regulated I/O Lines
In this mode, some I/O lines are powered by VDDIN while other I/O lines are powered by VDDIO.
Refer to Section on page 10 for description of power supply for each I/O line.
Refer to the Power Manager chapter for a description of what parts of the system are powered in
Shutdown mode.
Important note: As the regulator has a maximum output current of 60 mA, this mode can only be
used in applications where the maximum I/O current is known and compatible with the core and
peripheral power consumption. Typically, great care must be used to ensure that only a few I/O
lines are toggling at the same time and drive very small loads.
VDDIO
VDDCORE
+
- 1.98-3.6V
VDDANA ADC
VDDIN GND
GNDANA
CPU,
Peripherals,
Memories,
SCIF, BOD,
RCSYS,
DFLL, PLL
OSC32K,
RC32K,
POR33,
SM33
I/O Pins I/O Pins
OSC32K_2,
AST, Wake,
Regulator
control
Linear
regulator
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6.1.4 Power-up Sequence
6.1.4.1 Maximum Rise Rate
To avoid risk of latch-up, the rise rate of the power supplies must not exceed the values
described in Table 35-3 on page 898.
Recommended order for power supplies is also described in this chapter.
6.1.4.2 Minimum Rise Rate
The integrated Power-on Reset (POR33) circuitry monitoring the VDDIN powering supply
requires a minimum rise rate for the VDDIN power supply.
See Table 35-3 on page 898 for the minimum rise rate value.
If the application can not ensure that the minimum rise rate condition for the VDDIN power supply
is met, one of the following configurations can be used:
• A logic “0” value is applied during power-up on pin PA11 (WAKE_N) until VDDIN rises above
1.2V.
• A logic “0” value is applied during power-up on pin RESET_N until VDDIN rises above 1.2V.
6.2 Startup Considerations
This chapter summarizes the boot sequence of the ATUC64/128/256L3/4U. The behavior after
power-up is controlled by the Power Manager. For specific details, refer to the Power Manager
chapter.
6.2.1 Starting of Clocks
After power-up, the device will be held in a reset state by the Power-on Reset (POR18 and
POR33) circuitry for a short time to allow the power to stabilize throughout the device. After
reset, the device will use the System RC Oscillator (RCSYS) as clock source. Please refer to
Table 35-17 on page 910 for the frequency for this oscillator.
On system start-up, all high-speed clocks are disabled. All clocks to all modules are running. No
clocks have a divided frequency; all parts of the system receive a clock with the same frequency
as the System RC Oscillator.
When powering up the device, there may be a delay before the voltage has stabilized, depending
on the rise time of the supply used. The CPU can start executing code as soon as the supply
is above the POR18 and POR33 thresholds, and before the supply is stable. Before switching to
a high-speed clock source, the user should use the BOD to make sure the VDDCORE is above
the minimum level (1.62V).
6.2.2 Fetching of Initial Instructions
After reset has been released, the AVR32 UC CPU starts fetching instructions from the reset
address, which is 0x80000000. This address points to the first address in the internal Flash.
The code read from the internal flash is free to configure the clock system and clock sources.
Please refer to the PM and SCIF chapters for more details.
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7. Peripheral DMA Controller (PDCA)
Rev: 1.2.3.1
7.1 Features
• Multiple channels
• Generates transfers between memories and peripherals such as USART and SPI
• Two address pointers/counters per channel allowing double buffering
• Performance monitors to measure average and maximum transfer latency
• Optional synchronizing of data transfers with extenal peripheral events
• Ring buffer functionality
7.2 Overview
The Peripheral DMA Controller (PDCA) transfers data between on-chip peripheral modules such
as USART, SPI and memories (those memories may be on- and off-chip memories). Using the
PDCA avoids CPU intervention for data transfers, improving the performance of the microcontroller.
The PDCA can transfer data from memory to a peripheral or from a peripheral to memory.
The PDCA consists of multiple DMA channels. Each channel has:
• A Peripheral Select Register
• A 32-bit memory pointer
• A 16-bit transfer counter
• A 32-bit memory pointer reload value
• A 16-bit transfer counter reload value
The PDCA communicates with the peripheral modules over a set of handshake interfaces. The
peripheral signals the PDCA when it is ready to receive or transmit data. The PDCA acknowledges
the request when the transmission has started.
When a transmit buffer is empty or a receive buffer is full, an optional interrupt request can be
generated.
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7.3 Block Diagram
Figure 7-1. PDCA Block Diagram
7.4 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
7.4.1 Power Management
If the CPU enters a sleep mode that disables the PDCA clocks, the PDCA will stop functioning
and resume operation after the system wakes up from sleep mode.
7.4.2 Clocks
The PDCA has two bus clocks connected: One High Speed Bus clock (CLK_PDCA_HSB) and
one Peripheral Bus clock (CLK_PDCA_PB). These clocks are generated by the Power Manager.
Both clocks are enabled at reset, and can be disabled in the Power Manager. It is
recommended to disable the PDCA before disabling the clocks, to avoid freezing the PDCA in
an undefined state.
7.4.3 Interrupts
The PDCA interrupt request lines are connected to the interrupt controller. Using the PDCA
interrupts requires the interrupt controller to be programmed first.
HSB to PB
Bridge
Peripheral DMA
Controller
(PDCA)
Peripheral
0
High Speed
Bus Matrix
Handshake Interfaces Peripheral Bus
IRQ
HSB
HSB
Interrupt
Controller
Peripheral
1
Peripheral
2
Peripheral
(n-1) ...
Memory
HSB
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7.4.4 Peripheral Events
The PDCA peripheral events are connected via the Peripheral Event System. Refer to the
Peripheral Event System chapter for details.
7.5 Functional Description
7.5.1 Basic Operation
The PDCA consists of multiple independent PDCA channels, each capable of handling DMA
requests in parallel. Each PDCA channels contains a set of configuration registers which must
be configured to start a DMA transfer.
In this section the steps necessary to configure one PDCA channel is outlined.
The peripheral to transfer data to or from must be configured correctly in the Peripheral Select
Register (PSR). This is performed by writing the Peripheral Identity (PID) value for the corresponding
peripheral to the PID field in the PSR register. The PID also encodes the transfer
direction, i.e. memory to peripheral or peripheral to memory. See Section 7.5.6.
The transfer size must be written to the Transfer Size field in the Mode Register (MR.SIZE). The
size must match the data size produced or consumed by the selected peripheral. See Section
7.5.7.
The memory address to transfer to or from, depending on the PSR, must be written to the Memory
Address Register (MAR). For each transfer the memory address is increased by either a
one, two or four, depending on the size set in MR. See Section 7.5.2.
The number of data items to transfer is written to the TCR register. If the PDCA channel is
enabled, a transfer will start immediately after writing a non-zero value to TCR or the reload version
of TCR, TCRR. After each transfer the TCR value is decreased by one. Both MAR and TCR
can be read while the PDCA channel is active to monitor the DMA progress. See Section 7.5.3.
The channel must be enabled for a transfer to start. A channel is enable by writing a one to the
EN bit in the Control Register (CR).
7.5.2 Memory Pointer
Each channel has a 32-bit Memory Address Register (MAR). This register holds the memory
address for the next transfer to be performed. The register is automatically updated after each
transfer. The address will be increased by either one, two or four depending on the size of the
DMA transfer (byte, halfword or word). The MAR can be read at any time during transfer.
7.5.3 Transfer Counter
Each channel has a 16-bit Transfer Counter Register (TCR). This register must be written with
the number of transfers to be performed. The TCR register should contain the number of data
items to be transferred independently of the transfer size. The TCR can be read at any time during
transfer to see the number of remaining transfers.
7.5.4 Reload Registers
Both the MAR and the TCR have a reload register, respectively Memory Address Reload Register
(MARR) and Transfer Counter Reload Register (TCRR). These registers provide the
possibility for the PDCA to work on two memory buffers for each channel. When one buffer has
completed, MAR and TCR will be reloaded with the values in MARR and TCRR. The reload logic
is always enabled and will trigger if the TCR reaches zero while TCRR holds a non-zero value.
After reload, the MARR and TCRR registers are cleared.
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If TCR is zero when writing to TCRR, the TCR and MAR are automatically updated with the
value written in TCRR and MARR.
7.5.5 Ring Buffer
When Ring Buffer mode is enabled the TCRR and MARR registers will not be cleared when
TCR and MAR registers reload. This allows the PDCA to read or write to the same memory
region over and over again until the transfer is actively stopped by the user. Ring Buffer mode is
enabled by writing a one to the Ring Buffer bit in the Mode Register (MR.RING).
7.5.6 Peripheral Selection
The Peripheral Select Register (PSR) decides which peripheral should be connected to the
PDCA channel. A peripheral is selected by writing the corresponding Peripheral Identity (PID) to
the PID field in the PSR register. Writing the PID will both select the direction of the transfer
(memory to peripheral or peripheral to memory), which handshake interface to use, and the
address of the peripheral holding register. Refer to the Peripheral Identity (PID) table in the Module
Configuration section for the peripheral PID values.
7.5.7 Transfer Size
The transfer size can be set individually for each channel to be either byte, halfword or word (8-
bit, 16-bit or 32-bit respectively). Transfer size is set by writing the desired value to the Transfer
Size field in the Mode Register (MR.SIZE).
When the PDCA moves data between peripherals and memory, data is automatically sized and
aligned. When memory is accessed, the size specified in MR.SIZE and system alignment is
used. When a peripheral register is accessed the data to be transferred is converted to a word
where bit n in the data corresponds to bit n in the peripheral register. If the transfer size is byte or
halfword, bits greater than 8 and16 respectively are set to zero.
Refer to the Module Configuration section for information regarding what peripheral registers are
used for the different peripherals and then to the peripheral specific chapter for information
about the size option available for the different registers.
7.5.8 Enabling and Disabling
Each DMA channel is enabled by writing a one to the Transfer Enable bit in the Control Register
(CR.TEN) and disabled by writing a one to the Transfer Disable bit (CR.TDIS). The current status
can be read from the Status Register (SR).
While the PDCA channel is enabled all DMA request will be handled as long the TCR and TCRR
is not zero.
7.5.9 Interrupts
Interrupts can be enabled by writing a one to the corresponding bit in the Interrupt Enable Register
(IER) and disabled by writing a one to the corresponding bit in the Interrupt Disable Register
(IDR). The Interrupt Mask Register (IMR) can be read to see whether an interrupt is enabled or
not. The current status of an interrupt source can be read through the Interrupt Status Register
(ISR).
The PDCA has three interrupt sources:
• Reload Counter Zero - The TCRR register is zero.
• Transfer Finished - Both the TCR and TCRR registers are zero.
• Transfer Error - An error has occurred in accessing memory.
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7.5.10 Priority
If more than one PDCA channel is requesting transfer at a given time, the PDCA channels are
prioritized by their channel number. Channels with lower numbers have priority over channels
with higher numbers, giving channel zero the highest priority.
7.5.11 Error Handling
If the Memory Address Register (MAR) is set to point to an invalid location in memory, an error
will occur when the PDCA tries to perform a transfer. When an error occurs, the Transfer Error
bit in the Interrupt Status Register (ISR.TERR) will be set and the DMA channel that caused the
error will be stopped. In order to restart the channel, the user must program the Memory
Address Register to a valid address and then write a one to the Error Clear bit in the Control
Register (CR.ECLR). If the Transfer Error interrupt is enabled, an interrupt request will be generated
when a transfer error occurs.
7.5.12 Peripheral Event Trigger
Peripheral events can be used to trigger PDCA channel transfers. Peripheral Event synchronizations
are enabled by writing a one to the Event Trigger bit in the Mode Register (MR.ETRIG).
When set, all DMA requests will be blocked until a peripheral event is received. For each peripheral
event received, only one data item is transferred. If no DMA requests are pending when a
peripheral event is received, the PDCA will start a transfer as soon as a peripheral event is
detected. If multiple events are received while the PDCA channel is busy transferring data, an
overflow condition will be signaled in the Peripheral Event System. Refer to the Peripheral Event
System chapter for more information.
7.6 Performance Monitors
Up to two performance monitors allow the user to measure the activity and stall cycles for PDCA
transfers. To monitor a PDCA channel, the corresponding channel number must be written to
one of the MON0/1CH fields in the Performance Control Register (PCONTROL) and a one must
be written to the corresponding CH0/1EN bit in the same register.
Due to performance monitor hardware resource sharing, the two monitor channels should NOT
be programmed to monitor the same PDCA channel. This may result in UNDEFINED performance
monitor behavior.
7.6.1 Measuring mechanisms
Three different parameters can be measured by each channel:
• The number of data transfer cycles since last channel reset, both for read and write
• The number of stall cycles since last channel reset, both for read and write
• The maximum latency since last channel reset, both for read and write
These measurements can be extracted by software and used to generate indicators for bus
latency, bus load, and maximum bus latency.
Each of the counters has a fixed width, and may therefore overflow. When an overflow is
encountered in either the Performance Channel Data Read/Write Cycle registers (PRDATA0/1
and PWDATA0/1) or the Performance Channel Read/Write Stall Cycles registers (PRSTALL0/1
and PWSTALL0/1) of a channel, all registers in the channel are reset. This behavior is altered if
the Channel Overflow Freeze bit is one in the Performance Control register (PCONTROL.CH0/1OVF).
If this bit is one, the channel registers are frozen when either DATA or
STALL reaches its maximum value. This simplifies one-shot readout of the counter values.
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The registers can also be manually reset by writing a one to the Channel Reset bit in the PCONTROL
register (PCONTROL.CH0/1RES). The Performance Channel Read/Write Latency
registers (PRLAT0/1 and PWLAT0/1) are saturating when their maximum count value is
reached. The PRLAT0/1 and PWLAT0/1 registers can only be reset by writing a one to the corresponding
reset bit in PCONTROL (PCONTROL.CH0/1RES).
A counter is enabled by writing a one to the Channel Enable bit in the Performance Control Register
(PCONTROL.CH0/1EN).
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7.7 User Interface
7.7.1 Memory Map Overview
The channels are mapped as shown in Table 7-1. Each channel has a set of configuration registers,
shown in Table 7-2, where n is the channel number.
7.7.2 Channel Memory Map
Note: 1. The reset values are device specific. Please refer to the Module Configuration section at the
end of this chapter.
Table 7-1. PDCA Register Memory Map
Address Range Contents
0x000 - 0x03F DMA channel 0 configuration registers
0x040 - 0x07F DMA channel 1 configuration registers
... ...
(0x000 - 0x03F)+m*0x040 DMA channel m configuration registers
0x800-0x830 Performance Monitor registers
0x834 Version register
Table 7-2. PDCA Channel Configuration Registers
Offset Register Register Name Access Reset
0x000 + n*0x040 Memory Address Register MAR Read/Write 0x00000000
0x004 + n*0x040 Peripheral Select Register PSR Read/Write - (1)
0x008 + n*0x040 Transfer Counter Register TCR Read/Write 0x00000000
0x00C + n*0x040 Memory Address Reload Register MARR Read/Write 0x00000000
0x010 + n*0x040 Transfer Counter Reload Register TCRR Read/Write 0x00000000
0x014 + n*0x040 Control Register CR Write-only 0x00000000
0x018 + n*0x040 Mode Register MR Read/Write 0x00000000
0x01C + n*0x040 Status Register SR Read-only 0x00000000
0x020 + n*0x040 Interrupt Enable Register IER Write-only 0x00000000
0x024 + n*0x040 Interrupt Disable Register IDR Write-only 0x00000000
0x028 + n*0x040 Interrupt Mask Register IMR Read-only 0x00000000
0x02C + n*0x040 Interrupt Status Register ISR Read-only 0x00000000
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7.7.3 Performance Monitor Memory Map
Note: 1. The number of performance monitors is device specific. If the device has only one performance
monitor, the Channel1 registers are not available. Please refer to the Module
Configuration section at the end of this chapter for the number of performance monitors on this
device.
7.7.4 Version Register Memory Map
Note: 1. The reset values are device specific. Please refer to the Module Configuration section at the end of this chapter.
Table 7-3. PDCA Performance Monitor Registers(1)
Offset Register Register Name Access Reset
0x800 Performance Control Register PCONTROL Read/Write 0x00000000
0x804 Channel0 Read Data Cycles PRDATA0 Read-only 0x00000000
0x808 Channel0 Read Stall Cycles PRSTALL0 Read-only 0x00000000
0x80C Channel0 Read Max Latency PRLAT0 Read-only 0x00000000
0x810 Channel0 Write Data Cycles PWDATA0 Read-only 0x00000000
0x814 Channel0 Write Stall Cycles PWSTALL0 Read-only 0x00000000
0x818 Channel0 Write Max Latency PWLAT0 Read-only 0x00000000
0x81C Channel1 Read Data Cycles PRDATA1 Read-only 0x00000000
0x820 Channel1 Read Stall Cycles PRSTALL1 Read-only 0x00000000
0x824 Channel1 Read Max Latency PRLAT1 Read-only 0x00000000
0x828 Channel1 Write Data Cycles PWDATA1 Read-only 0x00000000
0x82C Channel1 Write Stall Cycles PWSTALL1 Read-only 0x00000000
0x830 Channel1 Write Max Latency PWLAT1 Read-only 0x00000000
Table 7-4. PDCA Version Register Memory Map
Offset Register Register Name Access Reset
0x834 Version Register VERSION Read-only - (1)
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7.7.5 Memory Address Register
Name: MAR
Access Type: Read/Write
Offset: 0x000 + n*0x040
Reset Value: 0x00000000
• MADDR: Memory Address
Address of memory buffer. MADDR should be programmed to point to the start of the memory buffer when configuring the
PDCA. During transfer, MADDR will point to the next memory location to be read/written.
31 30 29 28 27 26 25 24
MADDR[31:24]
23 22 21 20 19 18 17 16
MADDR[23:16]
15 14 13 12 11 10 9 8
MADDR[15:8]
76543210
MADDR[7:0]
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7.7.6 Peripheral Select Register
Name: PSR
Access Type: Read/Write
Offset: 0x004 + n*0x040
Reset Value: -
• PID: Peripheral Identifier
The Peripheral Identifier selects which peripheral should be connected to the DMA channel. Writing a PID will select both which
handshake interface to use, the direction of the transfer and also the address of the Receive/Transfer Holding Register for the
peripheral. See the Module Configuration section of PDCA for details. The width of the PID field is device specific and
dependent on the number of peripheral modules in the device.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
PID
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7.7.7 Transfer Counter Register
Name: TCR
Access Type: Read/Write
Offset: 0x008 + n*0x040
Reset Value: 0x00000000
• TCV: Transfer Counter Value
Number of data items to be transferred by the PDCA. TCV must be programmed with the total number of transfers to be made.
During transfer, TCV contains the number of remaining transfers to be done.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
TCV[15:8]
76543210
TCV[7:0]
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7.7.8 Memory Address Reload Register
Name: MARR
Access Type: Read/Write
Offset: 0x00C + n*0x040
Reset Value: 0x00000000
• MARV: Memory Address Reload Value
Reload Value for the MAR register. This value will be loaded into MAR when TCR reaches zero if the TCRR register has a nonzero
value.
31 30 29 28 27 26 25 24
MARV[31:24]
23 22 21 20 19 18 17 16
MARV[23:16]
15 14 13 12 11 10 9 8
MARV[15:8]
76543210
MARV[7:0]
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7.7.9 Transfer Counter Reload Register
Name: TCRR
Access Type: Read/Write
Offset: 0x010 + n*0x040
Reset Value: 0x00000000
• TCRV: Transfer Counter Reload Value
Reload value for the TCR register. When TCR reaches zero, it will be reloaded with TCRV if TCRV has a positive value. If TCRV
is zero, no more transfers will be performed for the channel. When TCR is reloaded, the TCRR register is cleared.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
TCRV[15:8]
76543210
TCRV[7:0]
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7.7.10 Control Register
Name: CR
Access Type: Write-only
Offset: 0x014 + n*0x040
Reset Value: 0x00000000
• ECLR: Transfer Error Clear
Writing a zero to this bit has no effect.
Writing a one to this bit will clear the Transfer Error bit in the Status Register (SR.TERR). Clearing the SR.TERR bit will allow the
channel to transmit data. The memory address must first be set to point to a valid location.
• TDIS: Transfer Disable
Writing a zero to this bit has no effect.
Writing a one to this bit will disable transfer for the DMA channel.
• TEN: Transfer Enable
Writing a zero to this bit has no effect.
Writing a one to this bit will enable transfer for the DMA channel.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - - - ECLR
76543210
- - - - - - TDIS TEN
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7.7.11 Mode Register
Name: MR
Access Type: Read/Write
Offset: 0x018 + n*0x040
Reset Value: 0x00000000
• RING: Ring Buffer
0:The Ring buffer functionality is disabled.
1:The Ring buffer functionality is enabled. When enabled, the reload registers, MARR and TCRR will not be cleared after reload.
• ETRIG: Event Trigger
0:Start transfer when the peripheral selected in Peripheral Select Register (PSR) requests a transfer.
1:Start transfer only when or after a peripheral event is received.
• SIZE: Size of Transfer
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - RING ETRIG SIZE
Table 7-5. Size of Transfer
SIZE Size of Transfer
0 Byte
1 Halfword
2 Word
3 Reserved
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7.7.12 Status Register
Name: SR
Access Type: Read-only
Offset: 0x01C + n*0x040
Reset Value: 0x00000000
• TEN: Transfer Enabled
This bit is cleared when the TDIS bit in CR is written to one.
This bit is set when the TEN bit in CR is written to one.
0: Transfer is disabled for the DMA channel.
1: Transfer is enabled for the DMA channel.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - - - TEN
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7.7.13 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x020 + n*0x040
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - TERR TRC RCZ
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7.7.14 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x024 + n*0x040
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - TERR TRC RCZ
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7.7.15 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x028 + n*0x040
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - TERR TRC RCZ
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7.7.16 Interrupt Status Register
Name: ISR
Access Type: Read-only
Offset: 0x02C + n*0x040
Reset Value: 0x00000000
• TERR: Transfer Error
This bit is cleared when no transfer errors have occurred since the last write to CR.ECLR.
This bit is set when one or more transfer errors has occurred since reset or the last write to CR.ECLR.
• TRC: Transfer Complete
This bit is cleared when the TCR and/or the TCRR holds a non-zero value.
This bit is set when both the TCR and the TCRR are zero.
• RCZ: Reload Counter Zero
This bit is cleared when the TCRR holds a non-zero value.
This bit is set when TCRR is zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - TERR TRC RCZ
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7.7.17 Performance Control Register
Name: PCONTROL
Access Type: Read/Write
Offset: 0x800
Reset Value: 0x00000000
• MON1CH: Performance Monitor Channel 1
• MON0CH: Performance Monitor Channel 0
The PDCA channel number to monitor with counter n
Due to performance monitor hardware resource sharing, the two performance monitor channels should NOT be programmed to
monitor the same PDCA channel. This may result in UNDEFINED monitor behavior.
• CH1RES: Performance Channel 1 Counter Reset
Writing a zero to this bit has no effect.
Writing a one to this bit will reset the counter in the channel specified in MON1CH.
This bit always reads as zero.
• CH0RES: Performance Channel 0 Counter Reset
Writing a zero to this bit has no effect.
Writing a one to this bit will reset the counter in the channel specified in MON0CH.
This bit always reads as zero.
• CH1OF: Channel 1 Overflow Freeze
0: The performance channel registers are reset if DATA or STALL overflows.
1: All performance channel registers are frozen just before DATA or STALL overflows.
• CH1OF: Channel 0 Overflow Freeze
0: The performance channel registers are reset if DATA or STALL overflows.
1: All performance channel registers are frozen just before DATA or STALL overflows.
• CH1EN: Performance Channel 1 Enable
0: Performance channel 1 is disabled.
1: Performance channel 1 is enabled.
• CH0EN: Performance Channel 0 Enable
0: Performance channel 0 is disabled.
1: Performance channel 0 is enabled.
31 30 29 28 27 26 25 24
- - MON1CH
23 22 21 20 19 18 17 16
- - MON0CH
15 14 13 12 11 10 9 8
- - - - - - CH1RES CH0RES
76543210
- - CH1OF CH0OF - - CH1EN CH0EN
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7.7.18 Performance Channel 0 Read Data Cycles
Name: PRDATA0
Access Type: Read-only
Offset: 0x804
Reset Value: 0x00000000
• DATA: Data Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
31 30 29 28 27 26 25 24
DATA[31:24]
23 22 21 20 19 18 17 16
DATA[23:16]
15 14 13 12 11 10 9 8
DATA[15:8]
76543210
DATA[7:0]
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7.7.19 Performance Channel 0 Read Stall Cycles
Name: PRSTALL0
Access Type: Read-only
Offset: 0x808
Reset Value: 0x00000000
• STALL: Stall Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
31 30 29 28 27 26 25 24
STALL[31:24]
23 22 21 20 19 18 17 16
STALL[23:16]
15 14 13 12 11 10 9 8
STALL[15:8]
76543210
STALL[7:0]
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7.7.20 Performance Channel 0 Read Max Latency
Name: PRLAT0
Access Type: Read/Write
Offset: 0x80C
Reset Value: 0x00000000
• LAT: Maximum Transfer Initiation Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
This counter is saturating. The register is reset only when PCONTROL.CH0RES is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
LAT[15:8]
76543210
LAT[7:0]
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7.7.21 Performance Channel 0 Write Data Cycles
Name: PWDATA0
Access Type: Read-only
Offset: 0x810
Reset Value: 0x00000000
• DATA: Data Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
31 30 29 28 27 26 25 24
DATA[31:24]
23 22 21 20 19 18 17 16
DATA[23:16]
15 14 13 12 11 10 9 8
DATA[15:8]
76543210
DATA[7:0]
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7.7.22 Performance Channel 0 Write Stall Cycles
Name: PWSTALL0
Access Type: Read-only
Offset: 0x814
Reset Value: 0x00000000
• STALL: Stall Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
31 30 29 28 27 26 25 24
STALL[31:24]
23 22 21 20 19 18 17 16
STALL[23:16]
15 14 13 12 11 10 9 8
STALL[15:8]
76543210
STALL[7:0]
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7.7.23 Performance Channel 0 Write Max Latency
Name: PWLAT0
Access Type: Read/Write
Offset: 0x818
Reset Value: 0x00000000
• LAT: Maximum Transfer Initiation Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
This counter is saturating. The register is reset only when PCONTROL.CH0RES is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
LAT[15:8]
76543210
LAT[7:0]
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7.7.24 Performance Channel 1 Read Data Cycles
Name: PRDATA1
Access Type: Read-only
Offset: 0x81C
Reset Value: 0x00000000
• DATA: Data Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
31 30 29 28 27 26 25 24
DATA[31:24]
23 22 21 20 19 18 17 16
DATA[23:16]
15 14 13 12 11 10 9 8
DATA[15:8]
76543210
DATA[7:0]
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7.7.25 Performance Channel 1 Read Stall Cycles
Name: PRSTALL1
Access Type: Read-only
Offset: 0x820
Reset Value: 0x00000000
• STALL: Stall Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
31 30 29 28 27 26 25 24
STALL[31:24]
23 22 21 20 19 18 17 16
STALL[23:16]
15 14 13 12 11 10 9 8
STALL[15:8]
76543210
STALL[7:0]
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7.7.26 Performance Channel 1 Read Max Latency
Name: PRLAT1
Access Type: Read/Write
Offset: 0x824
Reset Value: 0x00000000
• LAT: Maximum Transfer Initiation Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
This counter is saturating. The register is reset only when PCONTROL.CH1RES is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
LAT[15:8]
76543210
LAT[7:0]
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7.7.27 Performance Channel 1 Write Data Cycles
Name: PWDATA1
Access Type: Read-only
Offset: 0x828
Reset Value: 0x00000000
• DATA: Data Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
31 30 29 28 27 26 25 24
DATA[31:24]
23 22 21 20 19 18 17 16
DATA[23:16]
15 14 13 12 11 10 9 8
DATA[15:8]
76543210
DATA[7:0]
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7.7.28 Performance Channel 1 Write Stall Cycles
Name: PWSTALL1
Access Type: Read-only
Offset: 0x82C
Reset Value: 0x00000000
• STALL: Stall Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
31 30 29 28 27 26 25 24
STALL[31:24]
23 22 21 20 19 18 17 16
STALL[23:16]
15 14 13 12 11 10 9 8
STALL[15:8]
76543210
STALL[7:0]
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7.7.29 Performance Channel 1 Write Max Latency
Name: PWLAT1
Access Type: Read/Write
Offset: 0x830
Reset Value: 0x00000000
• LAT: Maximum Transfer Initiation Cycles Counted Since Last Reset
Clock cycles are counted using the CLK_PDCA_HSB clock
This counter is saturating. The register is reset only when PCONTROL.CH1RES is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
LAT[15:8]
76543210
LAT[7:0]
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7.7.30 PDCA Version Register
Name: VERSION
Access Type: Read-only
Offset: 0x834
Reset Value: -
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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7.8 Module Configuration
The specific configuration for each PDCA instance is listed in the following tables.The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
The PDCA and the peripheral modules communicate through a set of handshake signals. The
following table defines the valid settings for the Peripheral Identifier (PID) in the PDCA Peripheral
Select Register (PSR). The direction is specified as observed from the memory, so RX
means transfers from peripheral to memory, and TX means from memory to peripheral.
Table 7-6. PDCA Configuration
Feature PDCA
Number of channels 12
Number of performance monitors 1
Table 7-7. PDCA Clocks
Clock Name Description
CLK_PDCA_HSB Clock for the PDCA HSB interface
CLK_PDCA_PB Clock for the PDCA PB interface
Table 7-8. Register Reset Values
Register Reset Value
PSR CH 0 0
PSR CH 1 1
PSR CH 2 2
PSR CH 3 3
PSR CH 4 4
PSR CH 5 5
PSR CH 6 6
PSR CH 7 7
PSR CH 8 8
PSR CH 9 9
PSR CH 10 10
PSR CH 11 11
VERSION 123
Table 7-9. Peripheral Identity Values
PID Direction Peripheral Instance Peripheral Register
0 RX USART0 RHR
1 RX USART1 RHR
2 RX USART2 RHR
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3 RX USART3 RHR
4 RX SPI RDR
5 RX TWIM0 RHR
6 RX TWIM1 RHR
7 RX TWIS0 RHR
8 RX TWIS1 RHR
9 RX ADCIFB LCDR
10 RX AW RHR
11 RX CAT ACOUNT
12 TX USART0 THR
13 TX USART1 THR
14 TX USART2 THR
15 TX USART3 THR
16 TX SPI TDR
17 TX TWIM0 THR
18 TX TWIM1 THR
19 TX TWIS0 THR
20 TX TWIS1 THR
21 TX AW THR
22 TX CAT MBLEN
23 TX ABDACB SDR0
24 TX ABDACB SDR1
25 RX IISC RHR (CH0)
26 RX IISC RHR (CH1)
27 TX IISC THR (CH0)
28 TX IISC THR (CH1)
29 RX CAT DMATSR
30 TX CAT DMATSW
Table 7-9. Peripheral Identity Values
PID Direction Peripheral Instance Peripheral Register
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8. USB Interface (USBC)
Rev: 2.0.0.15
8.1 Features
• Compatible with the USB 2.0 specification
• Supports full (12Mbit/s) and low (1.5Mbit/s) speed communication
• Seven physical pipes/endpoints in ping-pong mode
• Flexible pipe/endpoint configuration and reallocation of data buffers in embedded RAM
• Up to two memory banks per pipe/endpoint
• Built-in DMA with multi-packet support through ping-pong mode
• On-chip transceivers with built-in pull-ups and pull-downs
8.2 Overview
The Universal Serial Bus interface (USBC) module complies with the Universal Serial Bus (USB)
2.0 specification.
Each pipe/endpoint can be configured into one of several transfer types. It can be associated
with one or more memory banks (located inside the embedded system or CPU RAM) used to
store the current data payload. If two banks are used (“ping-pong” mode), then one bank is read
or written by the CPU (or any other HSB master) while the other is read or written by the USBC
core.
Table 8-1 describes the hardware configuration of the USBC module.
8.3 Block Diagram
The USBC interfaces a USB link with a data flow stored in the embedded ram (CPU or HSB).
The USBC requires a 48MHz ± 0.25% reference clock, which is the USB generic clock. For
more details see ”Clocks” on page 84. The 48MHz clock is used to generate either a 12MHz fullspeed
or a 1.5MHz low-speed bit clock from the received USB differential data, and to transmit
data according to full- or low-speed USB device tolerances. Clock recovery is achieved by a digital
phase-locked loop (a DPLL, not represented) in the USBC module, which complies with the
USB jitter specifications.
The USBC module consists of:
• HSB master interface
Table 8-1. Description of USB pipes/endpoints
pipe/endpoint Mnemonic Max. size
Number of
available banks Type
0 PEP0 1023 bytes 1 Control/Isochronous/Bulk/Interrupt
1 PEP1 1023 bytes 2 Control/Isochronous/Bulk/Interrupt
2 PEP2 1023 bytes 2 Control/Isochronous/Bulk/Interrupt
... ... ... ... ...
6 PEP6 1023 bytes 2 Control/Isochronous/Bulk/Interrupt
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• User interface
• USB Core
• Transceiver pads
Figure 8-1. USBC Block Diagram
Note: in the block diagram is symbolic, it is mapped to a GPIO pin (See Section “8.5.1” on page 84.).
The VBUS detection (rising edge detection on the GPIO pin) should be handled by software.
Interrupt
Controller
USB interrupts
DM
USB_VBUS (1)
USB
DP
User interface
SCIF GCLK_USBC @ 48 MHz
PB
USB 2.0
Core
USB clock
domain
System clock
domain
HSB
HSB Master
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8.4 I/O Lines Description
Table 8-2. I/O Lines Description
PIn Name Pin Description Type Active Level
DM Data -: Differential Data Line - Port Input/Output
DP Data +: Differential Data Line + Port Input/Output
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8.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
8.5.1 I/O Lines
The USBC pins may be multiplexed with the I/O Controller lines. The user must first configure
the I/O Controller to assign the desired USBC pins to their peripheral functions.
The USB VBUS line should be connected to a GPIO pin and the user should monitor this with
software.
8.5.2 Power Management
If the CPU enters a sleep mode that disables clocks used by the USBC, the USBC will stop functioning
and resume operation after the system wakes up from sleep mode.
8.5.3 Clocks
The USBC has two bus clocks connected: One High Speed Bus clock (CLK_USBC_HSB) and
one Peripheral Bus clock (CLK_USBC_PB). These clocks are generated by the Power Manager.
Both clocks are enabled at reset, and can be disabled by the Power Manager. It is
recommended to disable the USBC before disabling the clocks, to avoid freezing the USBC in
an undefined state.
The 48MHz USB clock is generated by a dedicated generic clock from the SCIF module. Before
using the USB, the user must ensure that the USB generic clock (GCLK_USBC) is enabled at
48MHz in the SCIF module.
8.5.4 Interrupts
The USBC interrupt request line is connected to the interrupt controller. Using the USBC interrupt
requires the interrupt controller to be programmed first.
The USBC asynchronous interrupt can wake the CPU from any sleep mode:
• The Wakeup Interrupt (WAKEUP)
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8.6 Functional Description
8.6.1 USB General Operation
8.6.1.1 Initialization
After a hardware reset, the USBC is in the Reset state. In this state:
• The module is disabled. The USBC Enable bit in the General Control register
(USBCON.USBE) is reset.
• The module clock is stopped in order to minimize power consumption. The Freeze USB Clock
bit in USBCON (USBCON.FRZCLK) is set.
• The USB pad is in suspend mode.
• The internal states and registers of the device are reset.
• The Freeze USB Clock (FRZCLK), USBC Enable (USBE), in USBCON and the Low-Speed
mode bit in the Device General Control register (UDCON.LS) can be written to by software,
so that the user can configure pads and speed before enabling the module. These values are
only taken into account once the module has been enabled and unfrozen.
After writing a one to USBCON.USBE, the USBC enters device mode in idle state.
Refer to Section 8.6.2 for the basic operation of the device mode.
The USBC can be disabled at any time by writing a zero to USBCON.USBE, this acts as a hardware
reset, except that the FRZCLK,bit in USBCON, and the LS bits in UDCON are not reset.
8.6.1.2 Interrupts
One interrupt vector is assigned to the USBC.
See Section 8.6.2.18 for further details about device interrupts.
See Section 8.5.4 for asynchronous interrupts.
8.6.1.3 Frozen clock
When the USB clock is frozen, it is still possible to access the following bits: FRZCLK, and USBE
in the USBCON register, and LS in the UDCON register.
When FRZCLK is set, only the asynchronous interrupt can trigger a USB interrupt (see Section
8.5.4).
8.6.1.4 Speed control
• Device mode
When the USBC interface is in device mode, the speed selection is done by the UDCON.LS bit,
connecting an internal pull-up resistor to either DP (full-speed mode) or DM (low-speed mode).
The LS bit shall be written before attaching the device, which can be simulated by clearing the
UDCON.DETACH bit.
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Figure 8-2. Speed Selection in device mode
8.6.1.5 Data management
Endpoints and pipe buffers can be allocated anywhere in the embedded memory (CPU RAM or
HSB RAM).
See ”RAM management” on page 90.
8.6.1.6 Pad Suspend
Figure 8-3 illustrates the behavior of the USB pad in device mode.
Figure 8-3. Pad Behavior
• In Idle state, the pad is in low power consumption mode.
• In Active state, the pad is working.
Figure 8-4 illustrates the pad events leading to a PAD state change.
RPU
UDCON.DETACH
DP
DM
UDCON.LS
VBUS
Idle
Active
USBE = 1
& DETACH = 0
& Suspend
USBE = 0
| DETACH = 1
| Suspend
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Figure 8-4. Pad events
The Suspend Interrupt bit in the Device Global Interrupt register (UDINT.SUSP) is set and the
Wakeup Interrupt (UDINT.WAKEUP) bit is cleared when a USB Suspend state has been
detected on the USB bus. This event automatically puts the USB pad in the Idle state. The
detection of a non-idle event sets WAKEUP, clears SUSP, and wakes the USB pad.
The pad goes to the Idle state if the module is disabled or if UDCON.DETACH is written to one.
It returns to the Active state when USBCON.USBE is written to one and DETACH is written to
zero.
SUSP Suspend detected Cleared on Wakeup
WAKEUP Wakeup detected Cleared by software to acknowledge the interrupt
PAD state
Active Idle Active
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8.6.2 USBC Device Mode Operation
8.6.2.1 Device Enabling
In device mode, the USBC supports full- and low-speed data transfers.
Including the default control endpoint, a total of seven endpoints are provided. They can be configured
as isochronous, bulk or interrupt types, as described in Table 8-1 on page 81
After a hardware reset, the USBC device mode is in the reset state (see Section 8.6.1.1). In this
state, the endpoint banks are disabled and neither DP nor DM are pulled up (DETACH is one).
DP or DM will be pulled up according to the selected speed as soon as the DETACH bit is written
to zero. See “Device mode” for further details.
When the USBC is enabled (USBE is one) in device mode, it enters the Idle state, minimizing
power consumption. Being in Idle state does not require the USB clocks to be activated.
The USBC device mode can be disabled or reset at any time by disabling the USBC (by writing
a zero to USBE).
8.6.2.2 USB reset
The USB bus reset is initiated by a connected host and managed by hardware.
When a USB reset state is detected on the USB bus, the following operations are performed by
the controller:
• UDCON register is reset except for the DETACH and SPDCONF bits.
• Device Frame Number Register (UDFNUM), Endpoint n Configuration Register (UECFGn),
and Endpoint n Control Register (UECONn) registers are cleared.
• The data toggle sequencing in all the endpoints are cleared.
• At the end of the reset process, the End of Reset (EORST) bit in the UDINT register is set.
8.6.2.3 Endpoint activation
When an endpoint is disabled (UERST.EPENn = 0) the data toggle sequence, Endpoint n Status
Set (UESTAn), and UECONn registers will be reset. The controller ignores all transactions to
this endpoint as long as it is inactive.
To complete an endpoint activation, the user should fill out the endpoint descriptor: see Figure 8-
5 on page 91.
8.6.2.4 Data toggle sequence
In order to respond to a CLEAR_FEATURE USB request without disabling the endpoint, the
user can clear the data toggle sequence by writing a one to the Reset Data Toggle Set bit in the
Endpoint n Control Set register (UECONnSET.RSTDTS)
8.6.2.5 Busy bank enable
In order to make an endpoint bank look busy regardless of its actual state, the user can write a
one to the Busy Bank Enable bit in the Endpoint n Control Register (UECONnSET.BUSY0/1ES).
If a BUSYnE bit is set, any transaction to this bank will be rejected with a NAK reply.
8.6.2.6 Address setup
The USB device address is set up according to the USB protocol.
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• After all kinds of resets, the USB device address is 0.
• The host starts a SETUP transaction with a SET_ADDRESS(addr) request.
• The user writes this address to the USB Address field (UDCON.UADD), and writes a zero to
the Address Enable bit (UDCON.ADDEN), resulting in the address remaining zero.
• The user sends a zero-length IN packet from the control endpoint.
• The user enables the stored USB device address by writing a one to ADDEN.
Once the USB device address is configured, the controller filters the packets to only accept
those targeting the address stored in UADD.
UADD and ADDEN should not be written to simultaneously. They should be written sequentially,
UADD field first.
If UADD or ADDEN is cleared, the default device address 0 is used. UADD and ADDEN are
cleared:
• On a hardware reset.
• When the USBC is disabled (USBE written to zero).
• When a USB reset is detected.
8.6.2.7 Suspend and Wakeup
When an idle USB bus state has been detected for 3 ms, the controller sets the Suspend
(SUSP) interrupt bit in UDINT. In this case, the transceiver is suspended, reducing power
consumption.
To further reduce power consumption it is recommended to freeze the USB clock by writing a
one to the Freeze USB Clock (FRZCLK) bit in USBCON when the USB bus is in suspend mode.
The MCU can also enter the idle or frozen sleep mode to further lower power consumption.
To recover from the suspend mode, the user shall wait for the Wakeup (WAKEUP) interrupt bit,
which is set when a non-idle event is detected, and then write a zero to FRZCLK.
As the WAKEUP interrupt bit in UDINT is set when a non-idle event is detected, it can occur
regardless of whether the controller is in the suspend mode or not. The SUSP and WAKEUP
interrupts are thus independent of each other except for that one bit is cleared when the other is
set.
8.6.2.8 Detach
The reset value of the DETACH bit located in the UDCON register, is one.
It is possible to initiate a device re-enumeration simply by writing a one and then a zero to
DETACH.
DETACH acts on the pull-up connections of the DP and DM pads. See “Device mode” for further
details.
8.6.2.9 Remote wakeup
The remote wakeup request (also known as upstream resume) is the only request the device
may send on its own initiative. This should be preceded by a DEVICE_REMOTE_WAKEUP
request from the host.
• First, the USBC must have detected a “Suspend” state on the bus, i.e. the remote wakeup
request can only be sent after a SUSP interrupt has been set.
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• The user may then write a one to the remote wakeup (RMWKUP) bit in UDCON to send an
Upstream Resume to the host initiating the wakeup. This will automatically be done by the
controller after 5ms of inactivity on the USB bus.
• When the controller sends the Upstream Resume, the Upstream Resume (UPRSM) interrupt
is set and SUSP is cleared.
• RMWKUP is cleared at the end of the transmitting Upstream Resume.
• In case of a rebroadcast resume initiated by the host, the End of Resume (EORSM) interrupt
is set when the rebroadcast resume is completed.
8.6.2.10 RAM management
Endpoint data can be physically allocated anywhere in the embedded RAM. The USBC controller
accesses these endpoints directly through the HSB master (built-in DMA).
The USBC controller reads the USBC descriptors to know where each endpoint is located. The
base address of the USBC descriptor (UDESC.UDESCA) needs to be written by the user. The
descriptors can also be allocated anywhere in the embedded RAM.
Before using an endpoint, the user should setup the endpoint address for each bank. Depending
on the direction, the type, and the packet-mode (single or multi-packet), the user should also initialize
the endpoint packet size, and the endpoint control and status fields, so that the USBC
controller does not compute random values from the RAM.
When using an endpoint the user should read the UESTAX.CURRBK field to know which bank
is currently being processed.
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Figure 8-5. Memory organization
Each descriptor of an endpoint n consists of four words.
• The address of the endpoint and the bank used (EPn_ADDR_BK0/1).
• The packet size information for the endpoint and bank (EPn_PCKSIZE_BK0/1):
Table 8-3. EPn_PCKSIZE_BK0/1 structure
– AUTO_ZLP: Auto zero length packet, see ”Multi packet mode for IN endpoints” on
page 96.
– MULTI_PACKET_SIZE: see ”Multi packet mode and single packet mode.” on page
93.
– BYTE_COUNT: see ”Multi packet mode and single packet mode.” on page 93.
31 30:16 15 14:0
AUTO_ZLP MULTI_PACKET_SIZE - BYTE_COUNT
EPn BK0
EP0_CTR_STA_BK0
E P 0 _ P C K S IZ E _ B K 0
EP0_ADDR_BK0 UDESCA
Growing Memory Addresses
Descriptor EP0
R e se rve d
EP0_CTR _STA_BK1
E P 0 _ P C K S IZ E _ B K 1
EP0_ADDR_BK1
R e se rve d
Bank0
Bank1
+0x000
+0x004
+0x008
+0x00C
+0x010
+0x014
+0x018
+0x01C
EP1_CTR_STA_BK0
E P 1 _ P C K S IZ E _ B K 0
EP1_ADDR_BK0
Descriptor EP1
R e se rve d
EP1_CTR _STA_BK1
E P 1 _ P C K S IZ E _ B K 1
EP1_ADDR_BK1
R e se rve d
Bank0
Bank1
+0x020
+0x024
+0x028
+0x02C
+0x030
+0x034
+0x038
+0x03C
EPn_CTR_STA_BK0
E P n _ P C K S IZ E _ B K 0
EPn_ADDR_BK0
R e se rve d
EPn_CTR _STA_BK1
E P n _ P C K S IZ E _ B K 1
EPn_ADDR_BK1
R e se rve d
Bank0
Bank1
Descriptor EPn
EPn BK1
U S B d e s c rip to rs
U S B B u ffe rs
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• The control and status fields for the endpoint and bank (EPn_CTR_STA_BK0/1):
Table 8-4. EPn_CTR_STA_BK0/1 structure
– UNDERF: Underflow status for isochronous IN transfer. See ”Data flow error” on
page 99.
– OVERF: Overflow status for isochronous OUT transfer. See ”Data flow error” on
page 99.
– CRCERR: CRC error status for isochronous OUT transfer. See ”CRC error” on page
99.
– STALLRQ_NEXT: Stall request for the next transfer. See ”STALL request” on page
92.
8.6.2.11 STALL request
For each endpoint, the STALL management is performed using:
• The STALL Request (STALLRQ) bit in UECONn is set to initiate a STALL request.
• The STALLed Interrupt (STALLEDI) bit in UESTAn is set when a STALL handshake has been
sent.
To answer requests with a STALL handshake, STALLRQ has to be set by writing a one to the
STALL Request Set (STALLRQS) bit. All following requests will be discarded (RXOUTI, etc. will
not be set) and handshaked with a STALL until the STALLRQ bit is cleared, by receiving a new
SETUP packet (for control endpoints) or by writing a one to the STALL Request Clear (STALLRQC)
bit.
Each time a STALL handshake is sent, the STALLEDI bit is set by the USBC and the EPnINT
interrupt is set.
The user can use the descriptor to manage STALL requests. The USBC controller reads the
EPn_CTR_STA_BK0/1.STALLRQ_NEXT bit after successful transactions and if it is one the
USBC controller will set UECON.STALLRQ. The STALL_NEXT bit will be cleared upon receiving
a SETUP transaction and the USBC controller will then clear the STALLRQ bit.
• Special considerations for control endpoints
If a SETUP packet is received at a control endpoint where a STALL request is active, the
Received SETUP Interrupt (RXSTPI) bit in UESTAn is set, and the STALLRQ and STALLEDI
bits are cleared. It allows the SETUP to be always ACKed as required by the USB standard.
This management simplifies the enumeration process management. If a command is not supported
or contains an error, the user requests a STALL and can return to the main task, waiting
for the next SETUP request.
• STALL handshake and retry mechanism
The retry mechanism has priority over the STALL handshake. A STALL handshake is sent if the
STALLRQ bit is set and if there is no retry required.
31:19 18 17 16 15:1 0
Status elements Control elements
- UNDERF OVERF CRCERR - STALLRQ_NEXT
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8.6.2.12 Multi packet mode and single packet mode.
Single packet mode is the default mode where one USB packet is managed per bank.
The multi-packet mode allows the user to manage data exceeding the maximum endpoint size
(UECFGn.EPSIZE) for an endpoint bank across multiple packets without software intervention.
This mode can also be coupled with the ping-pong mode.
• For an OUT endpoint, the EPn_PCKSIZE_BK0/1.MULTI_PACKET_SIZE field should be
configured correctly to enable the multi-packet mode. See ”Multi packet mode for OUT
endpoints” on page 98. For single packet mode, the MULTI_PACKET_SIZE should be
initialized to 0.
• For an IN endpoint, the EPn_PCKSIZE_BK0/1.BYTE_COUNT field should be configured
correctly to enable the multi-packet mode. See”Multi packet mode for IN endpoints” on page
96. For single packet mode, the BYTE_COUNT should be less than EPSIZE.
8.6.2.13 Management of control endpoints
• Overview
A SETUP request is always ACKed. When a new SETUP packet is received, the RXSTPI is set,
but not the Received OUT Data Interrupt (RXOUTI) bit.
The FIFO Control (FIFOCON) bit in UECONn is irrelevant for control endpoints. The user should
therefore never use it for these endpoints. When read, this value is always zero.
Control endpoints are managed using:
• The RXSTPI bit: is set when a new SETUP packet is received. This has to be cleared by
firmware in order to acknowledge the packet and to free the bank.
• The RXOUTI bit: is set when a new OUT packet is received. This has to be cleared by
firmware in order to acknowledge the packet and to free the bank.
• The Transmitted IN Data Interrupt (TXINI) bit: is set when the current bank is ready to accept
a new IN packet. This has to be cleared by firmware in order to send the packet.
• Control write
Figure 8-6 on page 94 shows a control write transaction. During the status stage, the controller
will not necessarily send a NAK on the first IN token:
• If the user knows the exact number of descriptor bytes that will be read, the status stage can
be predicted, and a zero-length packet can be sent after the next IN token.
• Alternatively the bytes can be read until the NAKed IN Interrupt (NAKINI) is triggered,
notifying that all bytes are sent by the host and that the transaction is now in the status stage.
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Figure 8-6. Control Write
• Control read
Figure 8-7 on page 94 shows a control read transaction. The USBC has to manage the simultaneous
write requests from the CPU and USB host.
Figure 8-7. Control Read
A NAK handshake is always generated as the first status stage command. The UESTAn.NAKINI
bit is set. It allows the user to know that the host aborts the IN data stage. As a consequence,
the user should stop processing the IN data stage and should prepare to receive the OUT status
stage by checking the UESTAn.RXOUTI bit.
The OUT retry is always ACKed. This OUT reception sets RXOUTI. Handle this with the following
software algorithm:
// process the IN data stage
set TXINI
wait for RXOUTI (rising) OR TXINI (falling)
if RXOUTI is high, then process the OUT status stage
if TXINI is low, then return to process the IN data stage
Once the OUT status stage has been received, the USBC waits for a SETUP request. The
SETUP request has priority over all other requests and will be ACKed.
SETUP
RXSTPI
RXOUTI
TXINI
USB Bus
HW SW
OUT
HW SW
OUT
HW SW
IN IN
NAK
SW
SETUP STATUS DATA
SETUP
RXSTPI
RXOUTI
TXINI
USB Bus
HW SW
IN
HW SW
IN OUT OUT
NAK
SW
SW
HW
Wr Enable
HOST
Wr Enable
CPU
SETUP STATUS DATA
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8.6.2.14 Management of IN endpoints
• Overview
IN packets are sent by the USBC device controller upon IN requests from the host.
The endpoint and its descriptor in RAM must be pre configured (see section ”RAM management”
on page 90 for more details).
When the current bank is clear, the TXINI and FIFO Control (UECONn.FIFOCON) bits will be set
simultaneously. This triggers an EPnINT interrupt if the Transmitted IN Data Interrupt Enable
(TXINE) bit in UECONn is one.
TXINI shall be cleared by software (by writing a one to the Transmitted IN Data Interrupt Enable
Clear bit in the Endpoint n Control Clear register (UECONnCLR.TXINIC)) to acknowledge the
interrupt. This has no effect on the endpoint FIFO.
The user writes the IN data to the bank referenced by the EPn descriptor and allows the USBC
to send the data by writing a one to the FIFO Control Clear (UECONnCLR.FIFOCONC) bit. This
will also cause a switch to the next bank if the IN endpoint is composed of multiple banks. The
TXINI and FIFOCON bits will be updated accordingly.
TXINI should always be cleared before clearing FIFOCON to avoid missing an TXINI event.
Figure 8-8. Example of an IN endpoint with one data bank
Figure 8-9. Example of an IN endpoint with two data banks
IN DATA
(bank 0) ACK
TXINI
FIFOCON
HW
write data to CPU
BANK 0
SW
SW SW
SW
IN
NAK
write data to CPU
BANK 0
IN DATA
(bank 0) ACK
TXINI
FIFOCON write data to CPU
BANK 0
SW
SW SW
SW
IN DATA
(bank 1) ACK
write data to CPU
BANK 1
SW
HW
write data to CPU
BANK0
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• Detailed description
The data is written according to this sequence:
• When the bank is empty, TXINI and FIFOCON are set, which triggers an EPnINT interrupt if
TXINE is one.
• The user acknowledges the interrupt by clearing TXINI.
• The user reads the UESTAX.CURRBK field to see which the current bank is.
• The user writes the data to the current bank, located in RAM as described by its descriptor:
EPn_ADDR_BK0/1.
• The user should write the size of the IN packet into the USB descriptor:
EPn_PCKSIZE_BK0/1.BYTE_COUNT.
• The user allows the controller to send the bank contents and switches to the next bank (if
any) by clearing FIFOCON.
If the endpoint uses several banks, the current one can be written while the previous one is
being read by the host. When the user clears FIFOCON, the next current bank may already be
clear and TXINI is set immediately.
An “Abort” stage can be produced when a zero-length OUT packet is received during an IN
stage of a control or isochronous IN transaction. The Kill IN Bank (KILLBK) bit in UECONn is
used to kill the last written bank. The best way to manage this abort is to apply the algorithm represented
on Figure 8-10 on page 96. See ”Endpoint n Control Register” on page 130 for more
details about the KILLBK bit.
Figure 8-10. Abort Algorithm
• Multi packet mode for IN endpoints
In multi packet mode, the user can prepare n USB packets in the bank to be sent on a multiple
IN transaction. The packet sizes will equal UECFGn.EPSIZE unless the AUTO_ZLP option is
Endpoint
Abort
Abort Done
Abort is based on the fact
that no bank is busy, i.e.,
that nothing has to be sent
Disable the TXINI interrupt.
EPRSTn = 1
NBUSYBK
== 0?
Yes
TXINEC = 1
No
KILLBKS = 1
KILLBK
Yes == 1?
Kill the last written bank.
Wait for the end of the
procedure
No
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set, or if the total byte count is not an integral multiple of EPSIZE, whereby the last packet
should be short.
To enable the multi packet mode, the user should configure the endpoint descriptor
(EPn_PCKSIZE_BK0/1.BYTE_COUNT) to the total size of the multi packet, which should be
larger than the endpoint size (EPSIZE).
Since the EPn_PCKSIZE_BK0/1.MULTI_PACKET_SIZE is incremented (by the transmitted
packet size) after each successful transaction, it should be set to zero when setting up a new
multi packet transfer.
The EPn_PCKSIZE_BK0/1.MULTI_PACKET_SIZE is cleared by hardware when all the bank
contents have been sent. The bank is considered as ready and the TX_IN flag is set when:
• A short packet (smaller than EPSIZE) has been transmitted.
• A packet has been successfully transmitted, the updated MULTI_PACKET_SIZE equals the
BYTE_COUNT, and the AUTO_ZLP field is not set.
• An extra zero length packet has been automatically sent for the last transfer of the current
bank, if BYTE_COUNT is a multiple of EPSIZE and AUTO_ZLP is set.
8.6.2.15 Management of OUT endpoints
• Overview
The endpoint and its descriptor in RAM must be pre configured, see section ”RAM management”
on page 90 for more details.
When the current bank is full, the RXOUTI and FIFO Control (UECONn.FIFOCON) bits will be
set simultaneously. This triggers an EPnINT interrupt if the Received OUT Data Interrupt Enable
(RXOUTE) bit in UECONn is one.
RXOUTI shall be cleared by software (by writing a one to the Received OUT Data Interrupt Clear
(RXOUTIC) bit) to acknowledge the interrupt. This has no effect on the endpoint FIFO.
The user reads the OUT data from the RAM and clears the FIFOCON bit to free the bank. This
will also cause a switch to the next bank if the OUT endpoint is composed of multiple banks.
RXOUTI should always be cleared before clearing FIFOCON to avoid missing an RXOUTI
event.
Figure 8-11. Example of an OUT endpoint with one data bank
OUT DATA
(bank 0) ACK
RXOUTI
FIFOCON
HW
OUT DATA
(bank 0) ACK
HW
SW
SW
SW
read data from CPU
BANK 0
read data from CPU
BANK 0
NAK
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Figure 8-12. Example of an OUT endpoint with two data banks
• Detailed description
Before using the OUT endpoint, one should properly initialize its descriptor for each bank. See
Figure 8-5 on page 91.
The data is read, according to this sequence:
• When the bank is full, RXOUTI and FIFOCON are set, which triggers an EPnINT interrupt if
RXOUTE is one.
• The user acknowledges the interrupt by writing a one to RXOUTIC in order to clear RXOUTI.
• The user reads the UESTAX.CURRBK field to know the current bank number.
• The user reads the byte count of the current bank from the descriptor in RAM
(EPn_PCKSIZE_BK0/1.BYTE_COUNT) to know how many bytes to read.
• The user reads the data in the current bank, located in RAM as described by its descriptor:
EPn_ADDR_BK0/1.
• The user frees the bank and switches to the next bank (if any) by clearing FIFOCON.
If the endpoint uses several banks, the current one can be read while the next is being written by
the host. When the user clears FIFOCON, the following bank may already be ready and RXOUTI
will be immediately set.
• Multi packet mode for OUT endpoints
In multi packet mode, the user can extend the size of the bank allowing the storage of n USB
packets in the bank.
To enable the multi packet mode, the user should configure the endpoint descriptor
(EPn_PCKSIZE_BK0/1.MULTI_PACKET_SIZE) to match the size of the multi packet.This value
should be a multiple of the endpoint size (UECFGn.EPSIZE).
Since the EPn_PCKSIZE_BK0/1.BYTE_COUNT is incremented (by the received packet size)
after each successful transaction, it should be set to zero when setting up a new multi packet
transfer.
As for single packet mode, the number of received data bytes is stored in the BYTE_CNT field.
The bank is considered as “valid” and the RX_OUT flag is set when:
OUT DATA
(bank 0)
ACK
RXOUTI
FIFOCON
HW
OUT DATA
(bank 1) ACK
SW
read data from CPU SW
BANK 0
HW
SW
read data from CPU
BANK 1
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• A packet has been successfully received and the updated BYTE_COUNT equals the
MULTI_PACKET_SIZE.
• A short packet (smaller than EPSIZE) has been received.
8.6.2.16 Data flow error
This error exists only for isochronous IN/OUT endpoints. It sets the Errorflow Interrupt
(ERRORFI) bit in UESTAn, which triggers an EPnINT interrupt if the Errorflow Interrupt Enable
(ERRORFE) bit is one. The user can check the EPn_CTR_STA_BK0/1.UNDERF and OVERF
bits in the endpoint descriptor to see which current bank has been affected.
• An underflow can occur during IN stage if the host attempts to read from an empty bank. A
zero-length packet is then automatically sent by the USBC. The endpoint descriptor
EPn_CTR_STA_BK0/1.UNDERF points out the bank from which the IN data should have
originated. If a new successful transaction occurs, the UNDERF bit is overwritten to 0 only if
the UESTAn.ERRORFI is cleared.
• An overflow can occur during the OUT stage if the host tries to send a packet while the bank
is full. Typically this occurs when a CPU is not fast enough. The packet data is not written to
the bank and is lost. The endpoint descriptor EPn_CTR_STA_BK0/1.OVERF points out
which bank the OUT data was destined to. If the UESTAn.ERRORFI bit is cleared and a new
transaction is successful, the OVERF bit will be overwritten to zero.
8.6.2.17 CRC error
This error exists only for isochronous OUT endpoints. It sets the CRC Error Interrupt (CRCERRI)
bit in UESTAn, which triggers an EPnINT interrupt if the CRC Error Interrupt Enable
(CRCERRE) bit is one.
A CRC error can occur during an isochronous OUT stage if the USBC detects a corrupted
received packet. The OUT packet is stored in the bank as if no CRC error had occurred
(RXOUTI is set).
The user can also check the endpoint descriptor to see which current bank is impacted by the
CRC error by reading EPn_CTR_STA_BK0/1.CRCERR.
8.6.2.18 Interrupts
There are two kinds of device interrupts: processing, i.e. their generation is part of the normal
processing, and exception, i.e. errors not related to CPU exceptions.
• Global interrupts
The processing device global interrupts are:
• The Suspend (SUSP) interrupt
• The Start of Frame (SOF) interrupt with no frame number CRC error (the Frame Number
CRC Error (FNCERR) bit in the Device Frame Number (UDFNUM) register is zero)
• The End of Reset (EORST) interrupt
• The Wakeup (WAKEUP) interrupt
• The End of Resume (EORSM) interrupt
• The Upstream Resume (UPRSM) interrupt
• The Endpoint n (EPnINT) interrupt
The exception device global interrupts are:
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• The Start of Frame (SOF) interrupt with a frame number CRC error (FNCERR is one)
• Endpoint interrupts
The processing device endpoint interrupts are:
• The Transmitted IN Data Interrupt (TXINI)
• The Received OUT Data Interrupt (RXOUTI)
• The Received SETUP Interrupt (RXSTPI)
• The Number of Busy Banks (NBUSYBK) interrupt
The exception device endpoint interrupts are:
• The Errorflow Interrupt (ERRORFI)
• The NAKed OUT Interrupt (NAKOUTI)
• The NAKed IN Interrupt (NAKINI)
• The STALLed Interrupt (STALLEDI)
• The CRC Error Interrupt (CRCERRI)
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8.7 User Interface
Note: 1. The reset values are device specific. Please refer to the Module Configuration section at the end of this chapter.
Table 8-5. USBC Register Memory Map
Offset Register Name Access Reset Value
0x0000 Device General Control Register UDCON Read/Write 0x00000100
0x0004 Device Global Interrupt Register UDINT Read-Only 0x00000000
0x0008 Device Global Interrupt Clear Register UDINTCLR Write-Only 0x00000000
0x000C Device Global Interrupt Set Register UDINTSET Write-Only 0x00000000
0x0010 Device Global Interrupt Enable Register UDINTE Read-Only 0x00000000
0x0014 Device Global Interrupt Enable Clear Register UDINTECLR Write-Only 0x00000000
0x0018 Device Global Interrupt Enable Set Register UDINTESET Write-Only 0x00000000
0x001C Endpoint Enable/Reset Register UERST Read/Write 0x00000000
0x0020 Device Frame Number Register UDFNUM Read-Only 0x00000000
0x0100 + n*4 Endpoint n Configuration Register UECFGn Read/Write 0x00000000
0x0130 + n*4 Endpoint n Status Register UESTAn Read-Only 0x00000100
0x0160 + n*4 Endpoint n Status Clear Register UESTAnCLR Write-Only 0x00000000
0x0190 + n*4 Endpoint n Status Set Register UESTAnSET Write-Only 0x00000000
0x01C0 + n*4 Endpoint n Control Register UECONn Read-Only 0x00000000
0x01F0 + n*4 Endpoint n Control Set Register UECONnSET Write-Only 0x00000000
0x0220 + n*4 Endpoint n Control Clear Register UECONnCLR Write-Only 0x00000000
0x0800 General Control Register USBCON Read/Write 0x00004000
0x0804 General Status Register USBSTA Read-Only 0x00000000
0x0808 General Status Clear Register USBSTACLR Write-Only 0x00000000
0x080C General Status Set Register USBSTASET Write-Only 0x00000000
0x0818 IP Version Register UVERS Read-Only -(1)
0x081C IP Features Register UFEATURES Read-Only -(1)
0x0820 IP PB Address Size Register UADDRSIZE Read-Only -(1)
0x0824 IP Name Register 1 UNAME1 Read-Only -(1)
0x0828 IP Name Register 2 UNAME2 Read-Only -(1)
0x082C USB Finite State Machine Status Register USBFSM Read-Only 0x00000009
0x0830 USB Descriptor address UDESC Read/Write 0x00000000
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8.7.1 USB General Registers
8.7.1.1 General Control Register
Name: USBCON
Access Type: Read/Write
Offset: 0x0800
Reset Value: 0x00004000
• USBE: USBC Enable
Writing a zero to this bit will disable the USBC, USB transceiver, and USB clock inputs. This will over-ride FRZCLK settings but
not affect the value. Unless explicitly stated, all registers will become reset and read-only.
Writing a one to this bit will enable the USBC.
0: The USBC is disabled.
1: The USBC is enabled.
This bit can be written to even if FRZCLK is one.
• FRZCLK: Freeze USB Clock
Writing a zero to this bit will enable USB clock inputs.
Writing a one to this bit will disable USB clock inputs. The resume detection will remain active. Unless explicitly stated, all
registers will become read-only.
0: The clock inputs are enabled.
1: The clock inputs are disabled.
This bit can be written to even if USBE is zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
-- - -- -
15 14 13 12 11 10 9 8
USBE FRZCLK - - - - - -
76543210
--------
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8.7.1.2 General Status Register
Register Name: USBSTA
Access Type: Read-Only
Offset: 0x0804
Reset Value: 0x00000000
• CLKUSABLE: Generic Clock Usable
This bit is cleared when the USB generic clock is not usable.
This bit is set when the USB generic clock (that should be 48 Mhz) is usable.
• SPEED: Speed Status
This field is set according to the controller speed mode.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- CLKUSABLE SPEED - - - -
76543210
--------
SPEED Speed Status
00 full-speed mode
01 Reserved
10 low-speed mode
11 Reserved
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8.7.1.3 General Status Clear Register
Register Name: USBSTACLR
Access Type: Write-Only
Offset: 0x0808
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in USBSTA.
These bits always read as zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
--------
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8.7.1.4 General Status Set Register
Register Name: USBSTASET
Access Type: Write-Only
Offset: 0x080C
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in USBSTA.
These bits always read as zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
--------
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8.7.1.5 Version Register
Register Name: UVERS
Access Type: Read-Only
Offset: 0x0818
Reset Value: -
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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8.7.1.6 Features Register
Register Name: UFEATURES
Access Type: Read-Only
Offset: 0x081C
Reset Value: -
• EPTNBRMAX: Maximal Number of pipes/endpoints
This field indicates the number of hardware-implemented pipes/endpoints:
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - EPTNBRMAX
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8.7.1.7 Address Size Register
Register Name: UADDRSIZE
Access Type: Read-Only
Offset: 0x0820
Reset Value: -
• UADDRSIZE: IP PB Address Size
This field indicates the size of the PB address space reserved for the USBC IP interface.
31 30 29 28 27 26 25 24
UADDRSIZE[31:24]
23 22 21 20 19 18 17 16
UADDRSIZE[23:16]
15 14 13 12 11 10 9 8
UADDRSIZE[15:8]
76543210
UADDRSIZE[7:0]
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8.7.1.8 IP Name Register 1
Register Name: UNAME1
Access Type: Read-Only
Offset: 0x0824
Reset Value: -
• UNAME1: IP Name Part One
This field indicates the first part of the ASCII-encoded name of the USBC IP.
31 30 29 28 27 26 25 24
UNAME1[31:24]
23 22 21 20 19 18 17 16
UNAME1[23:16]
15 14 13 12 11 10 9 8
UNAME1[15:8]
76543210
UNAME1[7:0]
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8.7.1.9 IP Name Register 2
Register Name: UNAME2
Access Type: Read-Only
Offset: 0x0828
Reset Value:
• UNAME2: IP Name Part Two
This field indicates the second part of the ASCII-encoded name of the USBC IP.
31 30 29 28 27 26 25 24
UNAME2[31:24]
23 22 21 20 19 18 17 16
UNAME2[23:16]
15 14 13 12 11 10 9 8
UNAME2[15:8]
76543210
UNAME2[7:0]
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8.7.1.10 Finite State Machine Status Register
Register Name: USBFSM
Access Type: Read-Only
Offset: 0x082C
Reset Value: 0x00000009
• DRDSTATE: Dual Role Device State
This field indicates the state of the USBC.
For Device mode it should always read 9.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - DRDSTATE
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8.7.1.11 USB Descriptor Address
Register Name: UDESC
Access Type: Read-Write
Offset: 0x0830
Reset Value: -
• UDESCA: USB Descriptor Address
This field contains the address of the USB descriptor. The three least significant bits are always zero.
31 30 29 28 27 26 25 24
UDESCA[31:24]
23 22 21 20 19 18 17 16
UDESCA[23:16]
15 14 13 12 11 10 9 8
UDESCA[15:8]
76543210
UDESCA[7:0]
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8.7.2 USB Device Registers
8.7.2.1 Device General Control Register
Register Name: UDCON
Access Type: Read/Write
Offset: 0x0000
Reset Value: 0x00000100
• GNAK: Global NAK
0: Normal mode.
1: A NAK handshake is answered for each USB transaction regardless of the current endpoint memory bank status.
• LS: low-speed mode force
0: The full-speed mode is active.
1: The low-speed mode is active.
This bit can be written to even if USBE is zero or FRZCLK is one. Disabling the USBC (by writing a zero to the USBE bit) does
not reset this bit.
• RMWKUP: Remote wakeup
Writing a zero to this bit has no effect.
Writing a one to this bit will send an upstream resume to the host for a remote wakeup.
This bit is cleared when the USBC receives a USB reset or once the upstream resume has been sent.
• DETACH: Detach
Writing a zero to this bit will reconnect the device.
Writing a one to this bit will physically detach the device (disconnect internal pull-up resistor from DP and DM).
• ADDEN: Address Enable
Writing a zero to this bit has no effect.
Writing a one to this bit will activate the UADD field (USB address).
This bit is cleared when a USB reset is received.
• UADD: USB Address
This field contains the device address.
This field is cleared when a USB reset is received.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - - - GNAK -
15 14 13 12 11 10 9 8
- - - LS - - RMWKUP DETACH
76543210
ADDEN UADD
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8.7.2.2 Device Global Interrupt Register
Register Name: UDINT
Access Type: Read-Only
Offset: 0x0004
Reset Value: 0x00000000
Note: 1. EPnINT bits are within the range from EP0INT to EP6INT.
• EPnINT: Endpoint n Interrupt
This bit is cleared when the interrupt source is serviced.
This bit is set when an interrupt is triggered by the endpoint n (UESTAn, UECONn). This triggers a USB interrupt if EPnINTE is
one.
• UPRSM: Upstream Resume Interrupt
This bit is cleared when the UDINTCLR.UPRSMC bit is written to one to acknowledge the interrupt (USB clock inputs must be
enabled before).
This bit is set when the USBC sends a resume signal called “Upstream Resume”. This triggers a USB interrupt if UPRSME is
one.
• EORSM: End of Resume Interrupt
This bit is cleared when the UDINTCLR.EORSMC bit is written to one to acknowledge the interrupt.
This bit is set when the USBC detects a valid “End of Resume” signal initiated by the host. This triggers a USB interrupt if
EORSME is one.
• WAKEUP: Wakeup Interrupt
This bit is cleared when the UDINTCLR.WAKEUPC bit is written to one to acknowledge the interrupt (USB clock inputs must be
enabled before) or when the Suspend (SUSP) interrupt bit is set.
This bit is set when the USBC is reactivated by a filtered non-idle signal from the lines (not by an upstream resume). This
triggers an interrupt if WAKEUPE is one.
This interrupt is generated even if the clock is frozen by the FRZCLK bit.
• EORST: End of Reset Interrupt
This bit is cleared when the UDINTCLR.EORSTC bit is written to one to acknowledge the interrupt.
This bit is set when a USB “End of Reset” has been detected. This triggers a USB interrupt if EORSTE is one.
• SOF: Start of Frame Interrupt
This bit is cleared when the UDINTCLR.SOFC bit is written to one to acknowledge the interrupt.
This bit is set when a USB “Start of Frame” PID (SOF) has been detected (every 1 ms). This triggers a USB interrupt if SOFE is
one. The FNUM field is updated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - EP8INT(1) EP7INT(1) EP6INT(1) EP5INT(1) EP4INT(1)
15 14 13 12 11 10 9 8
EP3INT(1) EP2INT(1) EP1INT(1) EP0INT - - - -
76543210
- UPRSM EORSM WAKEUP EORST SOF - SUSP
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• SUSP: Suspend Interrupt
This bit is cleared when the UDINTCLR.SUSPC bit is written to one to acknowledge the interrupt or when the Wakeup
(WAKEUP) interrupt bit is set.
This bit is set when a USB “Suspend” idle bus state has been detected for 3 frame periods (J state for 3 ms). This triggers a
USB interrupt if SUSPE is one.
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8.7.2.3 Device Global Interrupt Clear Register
Register Name: UDINTCLR
Access Type: Write-Only
Offset: 0x0008
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in UDINT.
These bits always read as zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- UPRSMC EORSMC WAKEUPC EORSTC SOFC - SUSPC
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8.7.2.4 Device Global Interrupt Set Register
Register Name: UDINTSET
Access Type: Write-Only
Offset: 0x000C
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in UDINT, which may be useful for test or debug purposes.
These bits always read as zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- UPRSMS EORSMS WAKEUPS EORSTS SOFS - SUSPS
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8.7.2.5 Device Global Interrupt Enable Register
Register Name: UDINTE
Access Type: Read-Only
Offset: 0x0010
Reset Value: 0x00000000
Note: 1. EPnINTE bits are within the range from EP0INTE to EP6INTE.
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in UDINTECLR is written to one.
A bit in this register is set when the corresponding bit in UDINTESET is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - EP8INTE(1) EP7INTE(1) EP6INTE(1) EP5INTE(1) EP4INTE(1)
15 14 13 12 11 10 9 8
EP3INTE(1) EP2INTE(1) EP1INTE(1) EP0INTE - - - -
76543210
- UPRSME EORSME WAKEUPE EORSTE SOFE - SUSPE
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8.7.2.6 Device Global Interrupt Enable Clear Register
Register Name: UDINTECLR
Access Type: Write-Only
Offset: 0x0014
Reset Value: 0x00000000
Note: 1. EPnINTEC bits are within the range from EP0INTEC to EP6INTEC.
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in UDINTE.
These bits always read as zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - EP8INTEC(1) EP7INTEC(1) EP6INTEC(1) EP5INTEC(1) EP4INTEC(1)
15 14 13 12 11 10 9 8
EP3INTEC(1) EP2INTEC(1) EP1INTEC(1) EP0INTEC - - - -
76543210
- UPRSMEC EORSMEC WAKEUPEC EORSTEC SOFEC - SUSPEC
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8.7.2.7 Device Global Interrupt Enable Set Register
Register Name: UDINTESET
Access Type: Write-Only
Offset: 0x0018
Reset Value: 0x00000000
Note: 1. EPnINTES bits are within the range from EP0INTES to EP6INTES.
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in UDINTE.
These bits always read as zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - EP8INTES(1) EP7INTES(1) EP6INTES(1) EP5INTES(1) EP4INTES(1)
15 14 13 12 11 10 9 8
EP3INTES(1) EP2INTES(1) EP1INTES(1) EP0INTES - - - -
76543210
- UPRSMES EORSMES WAKEUPES EORSTES SOFES - SUSPES
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8.7.2.8 Endpoint Enable/Reset Register
Register Name: UERST
Access Type: Read/Write
Offset: 0x001C
Reset Value: 0x00000000
• EPENn: Endpoint n Enable
Note: 1. EPENn bits are within the range from EPEN0 to EPEN6.
Writing a zero to this bit will disable the endpoint n (USB requests will be ignored), and resets the endpoints registers (UECFGn,
UESTAn, UECONn), but not the endpoint configuration (EPBK, EPSIZE, EPDIR, EPTYPE).
Writing a one to this bit will enable the endpoint n.
0: The endpoint n is disabled.
1: The endpoint n is enabled.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - - - EPEN8(1)
76543210
EPEN7(1) EPEN6(1) EPEN5(1) EPEN4(1) EPEN3(1) EPEN2(1) EPEN1(1) EPEN0
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8.7.2.9 Device Frame Number Register
Register Name: UDFNUM
Access Type: Read-Only
Offset: 0x0020
Reset Value: 0x00000000
• FNCERR: Frame Number CRC Error
This bit is cleared upon receiving a USB reset.
This bit is set when a corrupted frame number is received. This bit and the SOF interrupt bit are updated at the same time.
• FNUM: Frame Number
This field is cleared upon receiving a USB reset.
This field contains the 11-bit frame number information, as provided from the last SOF packet.
FNUM is updated even if a corrupted SOF is received.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
FNCERR - FNUM[10:5]
76543210
FNUM[4:0] - - -
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8.7.2.10 Endpoint n Configuration Register
Register Name: UECFGn, n in [0..6]
Access Type: Read/Write
Offset: 0x0100 + (n * 0x04)
Reset Value: 0x00000000
• EPTYPE: Endpoint Type
This field selects the endpoint type:
This field is cleared upon receiving a USB reset.
• EPDIR: Endpoint Direction
0: The endpoint direction is OUT.
1: The endpoint direction is IN (nor for control endpoints).
This bit is cleared upon receiving a USB reset.
• EPSIZE: Endpoint Size
This field determines the size of each endpoint bank:
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - EPTYPE - - EPDIR
76543210
- EPSIZE - EPBK - -
EPTYPE Endpoint Type
0 0 Control
0 1 Isochronous
1 0 Bulk
1 1 Interrupt
EPSIZE Endpoint Size
0 0 0 8 bytes
0 0 1 16 bytes
0 1 0 32 bytes
0 1 1 64 bytes
1 0 0 128 bytes
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This field is cleared upon receiving a USB reset (except for the endpoint 0).
• EPBK: Endpoint Banks
This bit selects the number of banks for the endpoint:
0: single-bank endpoint
1: double-bank endpoint
For control endpoints, a single-bank endpoint shall be selected.
This field is cleared upon receiving a USB reset (except for the endpoint 0).
1 0 1 256 bytes
1 1 0 512 bytes
1 1 1 1024 bytes
EPSIZE Endpoint Size
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8.7.2.11 Endpoint n Status Register
Register Name: UESTAn, n in [0..6]
Access Type: Read-Only 0x0100
Offset: 0x0130 + (n * 0x04)
Reset Value: 0x00000000
• CTRLDIR: Control Direction
Writing a zero or a one to this bit has no effect.
This bit is cleared after a SETUP packet to indicate that the following packet is an OUT packet.
This bit is set after a SETUP packet to indicate that the following packet is an IN packet.
• CURRBK: Current Bank
This bit is set for non-control endpoints, indicating the current bank:
This field may be updated one clock cycle after the RWALL bit changes, so the user should not poll this field as an interrupt bit.
• NBUSYBK: Number of Busy Banks
This field is set to indicate the number of busy banks:
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - - - CTRLDIR -
15 14 13 12 11 10 9 8
CURRBK NBUSYBK RAMACERI - DTSEQ
76543210
- STALLEDI/
CRCERRI - NAKINI NAKOUTI RXSTPI/
ERRORFI RXOUTI TXINI
CURRBK Current Bank
0 0 Bank0
0 1 Bank1
1 0 Reserved
1 1 Reserved
NBUSYBK Number of Busy Banks
0 0 0 (all banks free)
0 11
1 02
1 1 Reserved
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For IN endpoints, this indicates the number of banks filled by the user and ready for IN transfers. When all banks are free an
EPnINT interrupt will be triggered if NBUSYBKE is one.
For OUT endpoints, this indicates the number of banks filled by OUT transactions from the host. When all banks are busy an
EPnINT interrupt will be triggered if NBUSYBKE is one.
• RAMACERI: Ram Access Error Interrupt
This bit is cleared when the RAMACERIC bit is written to one, acknowledging the interrupt.
This bit is set when a RAM access underflow error occurs during an IN data stage.
• DTSEQ: Data Toggle Sequence
This field is set to indicate the PID of the current bank:
For IN transfers, this indicates the data toggle sequence that will be used for the next packet to be sent.
For OUT transfers, this value indicates the data toggle sequence of the data received in the current bank.
• STALLEDI: STALLed Interrupt
This bit is cleared when the STALLEDIC bit is written to one, acknowledging the interrupt.
This bit is set when a STALL handshake has been sent and triggers an EPnINT interrupt if STALLEDE is one.
• CRCERRI: CRC Error Interrupt
This bit is cleared when the CRCERRIC bit is written to one, acknowledging the interrupt.
This bit is set when a CRC error has been detected in an isochronous OUT endpoint bank, and triggers an EPnINT interrupt if
CRCERRE is one.
• NAKINI: NAKed IN Interrupt
This bit is cleared when the NAKINIC bit is written to one, acknowledging the interrupt.
This bit is set when a NAK handshake has been sent in response to an IN request from the host, and triggers an EPnINT
interrupt if NAKINE is one.
• NAKOUTI: NAKed OUT Interrupt
This bit is cleared when the NAKOUTIC bit is written to one, acknowledging the interrupt.
This bit is set when a NAK handshake has been sent in response to an OUT request from the host, and triggers an EPnINT
interrupt if NAKOUTE is one.
• ERRORFI: Isochronous Error flow Interrupt
This bit is cleared when the ERRORFIC bit is written to one, acknowledging the interrupt.
This bit is set, for isochronous IN/OUT endpoints, when an errorflow (underflow or overflow) error occurs, and triggers an
EPnINT interrupt if ERRORFE is one.
An underflow can occur during IN stage if the host attempts to read from an empty bank. A zero-length packet is then
automatically sent by the USBC.
An overflow can also occur during OUT stage if the host sends a packet while the bank is already full, resulting in the packet
being lost. This is typically due to a CPU not being fast enough.
This bit is inactive (cleared) for bulk and interrupt IN/OUT endpoints and it means RXSTPI for control endpoints.
• RXSTPI: Received SETUP Interrupt
This bit is cleared when the RXSTPIC bit is written to one, acknowledging the interrupt and freeing the bank.
This bit is set, for control endpoints, to signal that the current bank contains a new valid SETUP packet, and triggers an EPnINT
interrupt if RXSTPE is one.
This bit is inactive (cleared) for bulk and interrupt IN/OUT endpoints and it means UNDERFI for isochronous IN/OUT endpoints.
• RXOUTI: Received OUT Data Interrupt
This bit is cleared when the RXOUTIC bit is written to one, acknowledging the interrupt. For control endpoints, it releases the
bank. For other endpoint types, the user should clear the FIFOCON bit to free the bank. RXOUTI shall always be cleared before
clearing FIFOCON to avoid missing an interrupt.
DTSEQ Data Toggle Sequence
0 0 Data0
0 1 Data1
1 X Reserved
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This bit is set, for control endpoints, when the current bank contains a bulk OUT packet (data or status stage). This triggers an
EPnINT interrupt if RXOUTE is one.
This bit is set for isochronous, bulk and, interrupt OUT endpoints, at the same time as FIFOCON when the current bank is full.
This triggers an EPnINT interrupt if RXOUTE is one.
This bit is inactive (cleared) for isochronous, bulk and interrupt IN endpoints.
• TXINI: Transmitted IN Data Interrupt
This bit is cleared when the TXINIC bit is written to one, acknowledging the interrupt. For control endpoints, this will send the
packet. For other endpoint types, the user should clear the FIFOCON to allow the USBC to send the data. TXINI shall always be
cleared before clearing FIFOCON to avoid missing an interrupt.
This bit is set for control endpoints, when the current bank is ready to accept a new IN packet. This triggers an EPnINT interrupt
if TXINE is one.
This bit is set for isochronous, bulk and interrupt IN endpoints, at the same time as FIFOCON when the current bank is free.
This triggers an EPnINT interrupt if TXINE is one.
This bit is inactive (cleared) for isochronous, bulk and interrupt OUT endpoints.
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8.7.2.12 Endpoint n Status Clear Register
Register Name: UESTAnCLR, n in [0..6]
Access Type: Write-Only
Offset: 0x0160 + (n * 0x04)
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in UESTA.
These bits always read as zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - RAMACERIC - - -
76543210
- STALLEDIC/
CRCERRIC - NAKINIC NAKOUTIC RXSTPIC/
ERRORFIC RXOUTIC TXINIC
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8.7.2.13 Endpoint n Status Set Register
Register Name: UESTAnSET, n in [0..6]
Access Type: Write-Only
Offset: 0x0190 + (n * 0x04)
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in UESTA.
These bits always read as zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - NBUSYBKS RAMACERIS - -
76543210
- STALLEDIS/
CRCERRIS - NAKINIS NAKOUTIS RXSTPIS/
ERRORFIS RXOUTIS TXINIS
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8.7.2.14 Endpoint n Control Register
Register Name: UECONn, n in [0..6]
Access Type: Read-Only
Offset: 0x01C0 + (n * 0x04)
Reset Value: 0x00000000
• BUSY0E: Busy Bank0 Enable
This bit is cleared when the BUSY0C bit is written to one.
This bit is set when the BUSY0ES bit is written to one. This will set the bank 0 as “busy”. All transactions, except SETUP,
destined to this bank will be rejected (i.e: NAK token will be answered).
• BUSY1E: Busy Bank1 Enable
This bit is cleared when the BUSY1C bit is written to one.
This bit is set when the BUSY1ES bit is written to one. This will set the bank 1 as “busy”. All transactions, except SETUP,
destined to this bank will be rejected (i.e: NAK token will be answered).
• STALLRQ: STALL Request
This bit is cleared when a new SETUP packet is received or when the STALLRQC bit is written to zero.
This bit is set when the STALLRQS bit is written to one, requesting a STALL handshake to be sent to the host.
• RSTDT: Reset Data Toggle
The data toggle sequence is cleared when the RSTDTS bit is written to one (i.e., Data0 data toggle sequence will be selected
for the next sent (IN endpoints) or received (OUT endpoints) packet.
This bit is always read as zero.
• FIFOCON: FIFO Control
For control endpoints:
The FIFOCON and RWALL bits are irrelevant. The software shall therefore never use them for these endpoints. When read,
their value is always 0.
For IN endpoints:
This bit is cleared when the FIFOCONC bit is written to one, sending the FIFO data and switching to the next bank.
This bit is set simultaneously to TXINI, when the current bank is free.
For OUT endpoints:
This bit is cleared when the FIFOCONC bit is written to one, freeing the current bank and switching to the next.
This bit is set simultaneously to RXINI, when the current bank is full.
31 30 29 28 27 26 25 24
- - - - - - BUSY1E BUSY0E
23 22 21 20 19 18 17 16
- - - - STALLRQ RSTDT - -
15 14 13 12 11 10 9 8
- FIFOCON KILLBK NBUSYBKE RAMACERE - -
76543210
- STALLEDE/
CRCERRE - NAKINE NAKOUTE RXSTPE/
ERRORFE RXOUTE TXINE
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• KILLBK: Kill IN Bank
This bit is cleared by hardware after the completion of the “kill packet procedure”.
This bit is set when the KILLBKS bit is written to one, killing the last written bank.
The user shall wait for this bit to be cleared before trying to process another IN packet.
Caution: The bank is cleared when the “kill packet” procedure is completed by the USBC core:
If the bank is really killed, the NBUSYBK field is decremented.
If the bank sent instead of killed (IN transfer), the NBUSYBK field is decremented and the TXINI flag is set. This specific case
can occur if an IN token comes while the user tries to kill the bank.
Note: If two banks are ready to be sent, the above specific case will not occur, since the first bank is sent (IN transfer) while the
last bank is killed.
• NBUSYBKE: Number of Busy Banks Interrupt Enable
This bit is cleared when the NBUSYBKEC bit is written to zero, disabling the Number of Busy Banks interrupt (NBUSYBK).
This bit is set when the NBUSYBKES bit is written to one, enabling the Number of Busy Banks interrupt (NBUSYBK).
• RAMACERE: RAMACER Interrupt Enable
This bit is cleared when the RAMACEREC bit is written to one, disabling the RAMACER interrupt (RAMACERI).
This bit is set when the RAMACERES bit is written to one, enabling the RAMACER interrupt (RAMACERI).
• STALLEDE: STALLed Interrupt Enable
This bit is cleared when the STALLEDEC bit is written to one, disabling the STALLed interrupt (STALLEDI).
This bit is set when the STALLEDES bit is written to one, enabling the STALLed interrupt (STALLEDI).
• CRCERRE: CRC Error Interrupt Enable
This bit is cleared when the CRCERREC bit is written to one, disabling the CRC Error interrupt (CRCERRI).
This bit is set when the CRCERRES bit is written to one, enabling the CRC Error interrupt (CRCERRI).
• NAKINE: NAKed IN Interrupt Enable
This bit is cleared when the NAKINEC bit is written to one, disabling the NAKed IN interrupt (NAKINI).
This bit is set when the NAKINES bit is written to one, enabling the NAKed IN interrupt (NAKINI).
• NAKOUTE: NAKed OUT Interrupt Enable
This bit is cleared when the NAKOUTEC bit is written to one, disabling the NAKed OUT interrupt (NAKOUTI).
This bit is set when the NAKOUTES bit is written to one, enabling the NAKed OUT interrupt (NAKOUTI).
• RXSTPE: Received SETUP Interrupt Enable
This bit is cleared when the RXSTPEC bit is written to one, disabling the Received SETUP interrupt (RXSTPI).
This bit is set when the RXSTPES bit is written to one, enabling the Received SETUP interrupt (RXSTPI).
• ERRORFE: Errorflow Interrupt Enable
This bit is cleared when the ERRORFEC bit is written to one, disabling the Underflow interrupt (ERRORFI).
This bit is set when the ERRORFES bit is written to one, enabling the Underflow interrupt (ERRORFI).
• RXOUTE: Received OUT Data Interrupt Enable
This bit is cleared when the RXOUTEC bit is written to one, disabling the Received OUT Data interrupt (RXOUT).
This bit is set when the RXOUTES bit is written to one, enabling the Received OUT Data interrupt (RXOUT).
• TXINE: Transmitted IN Data Interrupt Enable
This bit is cleared when the TXINEC bit is written to one, disabling the Transmitted IN Data interrupt (TXINI).
This bit is set when the TXINES bit is written to one, enabling the Transmitted IN Data interrupt (TXINI).
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8.7.2.15 Endpoint n Control Clear Register
Register Name: UECONnCLR, n in [0..6]
Access Type: Write-Only
Offset: 0x0220 + (n * 0x04)
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in UECONn.
These bits always read as zero.
31 30 29 28 27 26 25 24
- - - - - - BUSY1EC BUSY0EC
23 22 21 20 19 18 17 16
- - - - STALLRQC - - -
15 14 13 12 11 10 9 8
- FIFOCONC - NBUSYBKEC RAMACEREC - - -
76543210
- STALLEDEC/
CRCERREC - NAKINEC NAKOUTEC RXSTPEC/
ERRORFEC RXOUTEC TXINEC
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8.7.2.16 Endpoint n Control Set Register
Register Name: UECONnSET, n in [0..6]
Access Type: Write-Only
Offset: 0x01F0 + (n * 0x04)
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in UECONn.
These bits always read as zero.
•
•
31 30 29 28 27 26 25 24
- - - - - - BUSY1ES BUSY0ES
23 22 21 20 19 18 17 16
- - - - STALLRQS RSTDTS - -
15 14 13 12 11 10 9 8
- - KILLBKS NBUSYBKES RAMACERES ---
76543210
- STALLEDES/
CRCERRES - NAKINES NAKOUTES RXSTPES/
ERRORFES RXOUTES TXINES
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8.8 Module Configuration
The specific configuration for each USBC instance is listed in the following tables. The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 8-6. USBC Clocks
Clock Name Description
CLK_USBC_PB Clock for the USBC PB interface
CLK_USBC_HSB Clock for the USBC HSB interface
GCLK_USBC The generic clock used for the USBC is GCLK7
Table 8-7. Register Reset Values
Register Reset Value
UVERS 0x00000200
UFEATURES 0x00000007
UADDRSIZE 0x00001000
UNAME1 0x48555342
UNAME2 0x00000000
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9. Flash Controller (FLASHCDW)
Rev: 1.2.0.0
9.1 Features
• Controls on-chip flash memory
• Supports 0 and 1 wait state bus access
• Buffers reducing penalty of wait state in sequential code or loops
• Allows interleaved burst reads for systems with one wait state, outputting one 32-bit word per
clock cycle for sequential reads
• Secure State for supporting FlashVault technology
• 32-bit HSB interface for reads from flash and writes to page buffer
• 32-bit PB interface for issuing commands to and configuration of the controller
• Flash memory is divided into 16 regions can be individually protected or unprotected
• Additional protection of the Boot Loader pages
• Supports reads and writes of general-purpose Non Volatile Memory (NVM) bits
• Supports reads and writes of additional NVM pages
• Supports device protection through a security bit
• Dedicated command for chip-erase, first erasing all on-chip volatile memories before erasing
flash and clearing security bit
9.2 Overview
The Flash Controller (FLASHCDW) interfaces the on-chip flash memory with the 32-bit internal
HSB bus. The controller manages the reading, writing, erasing, locking, and unlocking
sequences.
9.3 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
9.3.1 Power Management
If the CPU enters a sleep mode that disables clocks used by the FLASHCDW, the FLASHCDW
will stop functioning and resume operation after the system wakes up from sleep mode.
9.3.2 Clocks
The FLASHCDW has two bus clocks connected: One High Speed Bus clock
(CLK_FLASHCDW_HSB) and one Peripheral Bus clock (CLK_FLASHCDW_PB). These clocks
are generated by the Power Manager. Both clocks are enabled at reset, and can be disabled by
writing to the Power Manager. The user has to ensure that CLK_FLASHCDW_HSB is not turned
off before reading the flash or writing the pagebuffer and that CLK_FLASHCDW_PB is not
turned off before accessing the FLASHCDW configuration and control registers. Failing to do so
may deadlock the bus.
9.3.3 Interrupts
The FLASHCDW interrupt request lines are connected to the interrupt controller. Using the
FLASHCDW interrupts requires the interrupt controller to be programmed first.
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9.3.4 Debug Operation
When an external debugger forces the CPU into debug mode, the FLASHCDW continues normal
operation. If the FLASHCDW is configured in a way that requires it to be periodically
serviced by the CPU through interrupts or similar, improper operation or data loss may result
during debugging.
9.4 Functional Description
9.4.1 Bus Interfaces
The FLASHCDW has two bus interfaces, one High Speed Bus (HSB) interface for reads from the
flash memory and writes to the page buffer, and one Peripheral Bus (PB) interface for issuing
commands and reading status from the controller.
9.4.2 Memory Organization
The flash memory is divided into a set of pages. A page is the basic unit addressed when programming
the flash. A page consists of several words. The pages are grouped into 16 regions of
equal size. Each of these regions can be locked by a dedicated fuse bit, protecting it from accidental
modification.
• p pages (FLASH_P)
• w bytes in each page and in the page buffer (FLASH_W)
• pw bytes in total (FLASH_PW)
• f general-purpose fuse bits (FLASH_F), used as region lock bits and for other device-specific
purposes
• 1 security fuse bit
• 1 User page
9.4.3 User Page
The User page is an additional page, outside the regular flash array, that can be used to store
various data, such as calibration data and serial numbers. This page is not erased by regular
chip erase. The User page can only be written and erased by a special set of commands. Read
accesses to the User page are performed just as any other read accesses to the flash. The
address map of the User page is given in Figure 9-1 on page 138.
9.4.4 Read Operations
The on-chip flash memory is typically used for storing instructions to be executed by the CPU.
The CPU will address instructions using the HSB bus, and the FLASHCDW will access the flash
memory and return the addressed 32-bit word.
In systems where the HSB clock period is slower than the access time of the flash memory, the
FLASHCDW can operate in 0 wait state mode, and output one 32-bit word on the bus per clock
cycle. If the clock frequency allows, the user should use 0 wait state mode, because this gives
the highest performance as no stall cycles are encountered.
The FLASHCDW can also operate in systems where the HSB bus clock period is faster than the
access speed of the flash memory. Wait state support and a read granularity of 64 bits ensure
efficiency in such systems.
Performance for systems with high clock frequency is increased since the internal read word
width of the flash memory is 64 bits. When a 32-bit word is to be addressed, the word itself and
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also the other word in the same 64-bit location is read. The first word is output on the bus, and
the other word is put into an internal buffer. If a read to a sequential address is to be performed
in the next cycle, the buffered word is output on the bus, while the next 64-bit location is read
from the flash memory. Thus, latency in 1 wait state mode is hidden for sequential fetches.
The programmer can select the wait states required by writing to the FWS field in the Flash Control
Register (FCR). It is the responsibility of the programmer to select a number of wait states
compatible with the clock frequency and timing characteristics of the flash memory.
In 0ws mode, no wait states are encountered on any flash read operations. In 1 ws mode, one
stall cycle is encountered on the first access in a single or burst transfer. In 1 ws mode, if the first
access in a burst access is to an address that is not 64-bit aligned, an additional stall cycle is
also encountered when reading the second word in the burst. All subsequent words in the burst
are accessed without any stall cycles.
The Flash Controller provides two sets of buffers that can be enabled in order to speed up
instruction fetching. These buffers can be enabled by writing a one to the FCR.SEQBUF and
FCR.BRBUF bits. The SEQBUF bit enables buffering hardware optimizing sequential instruction
fetches. The BRBUF bit enables buffering hardware optimizing tight inner loops. These buffers
are never used when the flash is in 0 wait state mode. Usually, both these buffers should be
enabled when operating in 1 wait state mode. Some users requiring absolute cycle determinism
may want to keep the buffers disabled.
The Flash Controller address space is displayed in Figure 9-1. The memory space between
address pw and the User page is reserved, and reading addresses in this space returns an
undefined result. The User page is permanently mapped to an offset of 0x00800000 from the
start address of the flash memory.
Table 9-1. User Page Addresses
Memory type Start address, byte sized Size
Main array 0 pw bytes
User 0x00800000 w bytes
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Figure 9-1. Memory Map for the Flash Memories
9.4.5 High Speed Read Mode
The flash provides a High Speed Read Mode, offering slightly higher flash read speed at the
cost of higher power consumption. Two dedicated commands, High Speed Read Mode Enable
(HSEN) and High Speed Read Mode Disable (HSDIS) control the speed mode. The High Speed
Mode (HSMODE) bit in the Flash Status Register (FSR) shows which mode the flash is in. After
reset, the High Speed Mode is disabled, and must be manually enabled if the user wants to.
Refer to the Electrical Characteristics chapter at the end of this datasheet for details on the maximum
clock frequencies in Normal and High Speed Read Mode.
0
pw
Reserved Flash data array
Reserved User Page
Flash with User Page
0x0080 0000
All addresses are byte addresses
Flash base address
Offset from
base address
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Figure 9-2. High Speed Mode
9.4.6 Quick Page Read
A dedicated command, Quick Page Read (QPR), is provided to read all words in an addressed
page. All bits in all words in this page are AND’ed together, returning a 1-bit result. This result is
placed in the Quick Page Read Result (QPRR) bit in Flash Status Register (FSR). The QPR
command is useful to check that a page is in an erased state. The QPR instruction is much
faster than performing the erased-page check using a regular software subroutine.
9.4.7 Quick User Page Read
A dedicated command, Quick User Page Read (QPRUP), is provided to read all words in the
user page. All bits in all words in this page are AND’ed together, returning a 1-bit result. This
result is placed in the Quick Page Read Result (QPRR) bit in Flash Status Register (FSR). The
QPRUP command is useful to check that a page is in an erased state. The QPRUP instruction is
much faster than performing the erased-page check using a regular software subroutine.
9.4.8 Page Buffer Operations
The flash memory has a write and erase granularity of one page; data is written and erased in
chunks of one page. When programming a page, the user must first write the new data into the
Page Buffer. The contents of the entire Page Buffer is copied into the desired page in flash
memory when the user issues the Write Page command, Refer to Section 9.5.1 on page 141.
In order to program data into flash page Y, write the desired data to locations Y0 to Y31 in the
regular flash memory map. Writing to an address A in the flash memory map will not update the
flash memory, but will instead update location A%32 in the page buffer. The PAGEN field in the
Flash Command (FCMD) register will at the same time be updated with the value A/32.
Frequency
Frequency limit
for 0 wait state
operation
Normal
High
Speed mode
1 wait state
0 wait state
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Figure 9-3. Mapping from Page Buffer to Flash
Internally, the flash memory stores data in 64-bit doublewords. Therefore, the native data size of
the Page Buffer is also a 64-bit doubleword. All locations shown in Figure 9-3 are therefore doubleword
locations. Since the HSB bus only has a 32-bit data width, two 32-bit HSB transfers
must be performed to write a 64-bit doubleword into the Page Buffer. The FLASHCDW has logic
to combine two 32-bit HSB transfers into a 64-bit data before writing this 64-bit data into the
Page Buffer. This logic requires the word with the low address to be written to the HSB bus
before the word with the high address. To exemplify, to write a 64-bit value to doubleword X0
residing in page X, first write a 32-bit word to the byte address pointing to address X0, thereafter
write a word to the byte address pointing to address (X0+4).
The page buffer is word-addressable and should only be written with aligned word transfers,
never with byte or halfword transfers. The page buffer can not be read.
The page buffer is also used for writes to the User page.
Page buffer write operations are performed with 4 wait states. Any accesses attempted to the
FLASHCDW on the HSB bus during these cycles will be automatically stalled.
Writing to the page buffer can only change page buffer bits from one to zero, i.e. writing
0xAAAAAAAA to a page buffer location that has the value 0x00000000 will not change the page
buffer value. The only way to change a bit from zero to one is to erase the entire page buffer with
the Clear Page Buffer command.
Z3 Z2 Z1 Z0
Z7 Z6 Z5 Z4
Z11 Z10 Z9 Z8
Z15 Z14 Z13 Z12
Z19 Z18 Z17 Z16
Z23 Z22 Z21 Z20
Z27 Z26 Z25 Z24
Z31 Z30 Z29 Z28
Y3 Y2 Y1 Y0
Y7 Y6 Y5 Y4
Y11 Y10 Y9 Y8
Y15 Y14 Y13 Y12
Y19 Y18 Y17 Y16
Y23 Y22 Y21 Y20
Y27 Y26 Y25 Y24
Y31 Y30 Y29 Y28
X3 X2 X1 X0
X7 X6 X5 X4
X11 X10 X9 X8
X15 X14 X13 X12
X19 X18 X17 X16
X23 X22 X21 X20
X27 X26 X25 X24
X31 X30 X29 X28
3 2 1 0
7 6 5 4
11 10 9 8
15 14 13 12
19 18 17 16
23 22 21 20
27 26 25 24
31 30 29 28
Page X
Page Y
Page Z
Page Buffer
64-bit data
Flash
All locations are doubleword locations
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The page buffer is not automatically reset after a page write. The programmer should do this
manually by issuing the Clear Page Buffer flash command. This can be done after a page write,
or before the page buffer is loaded with data to be stored to the flash page.
9.5 Flash Commands
The FLASHCDW offers a command set to manage programming of the flash memory, locking
and unlocking of regions, and full flash erasing. See Section 9.8.2 for a complete list of
commands.
To run a command, the CMD field in the Flash Command Register (FCMD) has to be written
with the command number. As soon as the FCMD register is written, the FRDY bit in the Flash
Status Register (FSR) is automatically cleared. Once the current command is complete, the
FSR.FRDY bit is automatically set. If an interrupt has been enabled by writing a one to
FCR.FRDY, the interrupt request line of the Flash Controller is activated. All flash commands
except for Quick Page Read (QPR) and Quick User Page Read (QPRUP) will generate an interrupt
request upon completion if FCR.FRDY is one.
Any HSB bus transfers attempting to read flash memory when the FLASHCDW is busy executing
a flash command will be stalled, and allowed to continue when the flash command is
complete.
After a command has been written to FCMD, the programming algorithm should wait until the
command has been executed before attempting to read instructions or data from the flash or
writing to the page buffer, as the flash will be busy. The waiting can be performed either by polling
the Flash Status Register (FSR) or by waiting for the flash ready interrupt. The command
written to FCMD is initiated on the first clock cycle where the HSB bus interface in FLASHCDW
is IDLE. The user must make sure that the access pattern to the FLASHCDW HSB interface
contains an IDLE cycle so that the command is allowed to start. Make sure that no bus masters
such as DMA controllers are performing endless burst transfers from the flash. Also, make sure
that the CPU does not perform endless burst transfers from flash. This is done by letting the
CPU enter sleep mode after writing to FCMD, or by polling FSR for command completion. This
polling will result in an access pattern with IDLE HSB cycles.
All the commands are protected by the same keyword, which has to be written in the eight highest
bits of the FCMD register. Writing FCMD with data that does not contain the correct key
and/or with an invalid command has no effect on the flash memory; however, the PROGE bit is
set in the Flash Status Register (FSR). This bit is automatically cleared by a read access to the
FSR register.
Writing a command to FCMD while another command is being executed has no effect on the
flash memory; however, the PROGE bit is set in the Flash Status Register (FSR). This bit is
automatically cleared by a read access to the FSR register.
If the current command writes or erases a page in a locked region, or a page protected by the
BOOTPROT fuses, the command has no effect on the flash memory; however, the LOCKE bit is
set in the FSR register. This bit is automatically cleared by a read access to the FSR register.
9.5.1 Write/Erase Page Operation
Flash technology requires that an erase must be done before programming. The entire flash can
be erased by an Erase All command. Alternatively, pages can be individually erased by the
Erase Page command.
The User page can be written and erased using the mechanisms described in this chapter.
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After programming, the page can be locked to prevent miscellaneous write or erase sequences.
Locking is performed on a per-region basis, so locking a region locks all pages inside the region.
Additional protection is provided for the lowermost address space of the flash. This address
space is allocated for the Boot Loader, and is protected both by the lock bit(s) corresponding to
this address space, and the BOOTPROT[2:0] fuses.
Data to be written is stored in an internal buffer called the page buffer. The page buffer contains
w words. The page buffer wraps around within the internal memory area address space and
appears to be repeated by the number of pages in it. Writing of 8-bit and 16-bit data to the page
buffer is not allowed and may lead to unpredictable data corruption.
Data must be written to the page buffer before the programming command is written to the Flash
Command Register (FCMD). The sequence is as follows:
• Reset the page buffer with the Clear Page Buffer command.
• Fill the page buffer with the desired contents as described in Section 9.4.8 on page 139.
• Programming starts as soon as the programming key and the programming command are
written to the Flash Command Register. The PAGEN field in the Flash Command Register
(FCMD) must contain the address of the page to write. PAGEN is automatically updated
when writing to the page buffer, but can also be written to directly. The FRDY bit in the Flash
Status Register (FSR) is automatically cleared when the page write operation starts.
• When programming is completed, the FRDY bit in the Flash Status Register (FSR) is set. If
an interrupt was enabled by writing FCR.FRDY to one, an interrupt request is generated.
Two errors can be detected in the FSR register after a programming sequence:
• Programming Error: A bad keyword and/or an invalid command have been written in the
FCMD register.
• Lock Error: Can have two different causes:
– The page to be programmed belongs to a locked region. A command must be
executed to unlock the corresponding region before programming can start.
– A bus master without secure status attempted to program a page requiring secure
privileges.
9.5.2 Erase All Operation
The entire memory is erased if the Erase All command (EA) is written to the Flash Command
Register (FCMD). Erase All erases all bits in the flash array. The User page is not erased. All
flash memory locations, the general-purpose fuse bits, and the security bit are erased (reset to
0xFF) after an Erase All.
The EA command also ensures that all volatile memories, such as register file and RAMs, are
erased before the security bit is erased.
Erase All operation is allowed only if no regions are locked, and the BOOTPROT fuses are configured
with a BOOTPROT region size of 0. Thus, if at least one region is locked, the bit LOCKE
in FSR is set and the command is cancelled. If the LOCKE bit in FCR is one, an interrupt request
is set generated.
When the command is complete, the FRDY bit in the Flash Status Register (FSR) is set. If an
interrupt has been enabled by writing FCR.FRDY to one, an interrupt request is generated. Two
errors can be detected in the FSR register after issuing the command:
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• Programming Error: A bad keyword and/or an invalid command have been written in the
FCMD register.
• Lock Error: At least one lock region is protected, or BOOTPROT is different from 0. The erase
command has been aborted and no page has been erased. A “Unlock region containing
given page” (UP) command must be executed to unlock any locked regions.
9.5.3 Region Lock Bits
The flash memory has p pages, and these pages are grouped into 16 lock regions, each region
containing p/16 pages. Each region has a dedicated lock bit preventing writing and erasing
pages in the region. After production, the device may have some regions locked. These locked
regions are reserved for a boot or default application. Locked regions can be unlocked to be
erased and then programmed with another application or other data.
To lock or unlock a region, the commands Lock Region Containing Page (LP) and Unlock
Region Containing Page (UP) are provided. Writing one of these commands, together with the
number of the page whose region should be locked/unlocked, performs the desired operation.
One error can be detected in the FSR register after issuing the command:
• Programming Error: A bad keyword and/or an invalid command have been written in the
FCMD register.
The lock bits are implemented using the lowest 16 general-purpose fuse bits. This means that
lock bits can also be set/cleared using the commands for writing/erasing general-purpose fuse
bits, see Section 9.6. The general-purpose bit being in an erased (1) state means that the region
is unlocked.
The lowermost pages in the flash can additionally be protected by the BOOTPROT fuses, see
Section 9.6.
9.6 General-purpose Fuse Bits
The flash memory has a number of general-purpose fuse bits that the application programmer
can use freely. The fuse bits can be written and erased using dedicated commands, and read
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through a dedicated Peripheral Bus address. Some of the general-purpose fuse bits are
reserved for special purposes, and should not be used for other functions:
The BOOTPROT fuses protects the following address space for the Boot Loader:
Table 9-2. General-purpose Fuses with Special Functions
GeneralPurpose
fuse
number Name Usage
15:0 LOCK Region lock bits.
16 EPFL
External Privileged Fetch Lock. Used to prevent the CPU from
fetching instructions from external memories when in privileged
mode. This bit can only be changed when the security bit is
cleared. The address range corresponding to external
memories is device-specific, and not known to the Flash
Controller. This fuse bit is simply routed out of the CPU or bus
system, the Flash Controller does not treat this fuse in any
special way, except that it can not be altered when the security
bit is set.
If the security bit is set, only an external JTAG or aWire Chip
Erase can clear EPFL. No internal commands can alter EPFL if
the security bit is set.
When the fuse is erased (i.e. "1"), the CPU can execute
instructions fetched from external memories. When the fuse is
programmed (i.e. "0"), instructions can not be executed from
external memories.
This fuse has no effect in devices with no External Memory
Interface (EBI).
19:17 BOOTPROT
Used to select one of eight different bootloader sizes. Pages
included in the bootloader area can not be erased or
programmed except by a JTAG or aWire chip erase.
BOOTPROT can only be changed when the security bit is
cleared.
If the security bit is set, only an external JTAG or aWire Chip
Erase can clear BOOTPROT, and thereby allow the pages
protected by BOOTPROT to be programmed. No internal
commands can alter BOOTPROT or the pages protected by
BOOTPROT if the security bit is set.
21:20 SECURE
Used to configure secure state and secure state debug
capabilities. Decoded into SSE and SSDE signals as shown in
Table 9-5. Refer to the AVR32 Architecture Manual and the
AVR32UC Technical Reference Manual for more details on
SSE and SSDE.
22 UPROT
If programmed (i.e. “0”), the JTAG USER PROTECTION
feature is enabled. If this fuse is programmed some HSB
addresses will be accessible by JTAG access even if the flash
security fuse is programmed. Refer to the JTAG documentation
for more information on this functionality. This bit can only be
changed when the security bit is cleared.
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The SECURE fuses have the following functionality:
To erase or write a general-purpose fuse bit, the commands Write General-Purpose Fuse Bit
(WGPB) and Erase General-Purpose Fuse Bit (EGPB) are provided. Writing one of these commands,
together with the number of the fuse to write/erase, performs the desired operation.
An entire General-Purpose Fuse byte can be written at a time by using the Program GP Fuse
Byte (PGPFB) instruction. A PGPFB to GP fuse byte 2 is not allowed if the flash is locked by the
security bit. The PFB command is issued with a parameter in the PAGEN field:
• PAGEN[2:0] - byte to write
• PAGEN[10:3] - Fuse value to write
All general-purpose fuses can be erased by the Erase All General-Purpose fuses (EAGP) command.
An EAGP command is not allowed if the flash is locked by the security bit.
Two errors can be detected in the FSR register after issuing these commands:
• Programming Error: A bad keyword and/or an invalid command have been written in the
FCMD register.
• Lock Error:
– A write or erase of the BOOTPROT or EPFL or UPROT fuse bits was attempted
while the flash is locked by the security bit.
– A write or erase of the SECURE fuse bits was attempted when SECURE mode was
enabled.
The lock bits are implemented using the lowest 16 general-purpose fuse bits. This means that
the 16 lowest general-purpose fuse bits can also be written/erased using the commands for
locking/unlocking regions, see Section 9.5.3.
Table 9-3. Boot Loader Area Specified by BOOTPROT
BOOTPROT
Pages protected by
BOOTPROT
Size of protected
memory
7 None 0
6 0-1 1Kbyte
5 0-3 2Kbyte
4 0-7 4Kbyte
3 0-15 8Kbyte
2 0-31 16Kbyte
1 0-63 32Kbyte
0 0-127 64Kbyte
Table 9-5. Secure State Configuration
SECURE Functionality SSE SSDE
00 Secure state disabled 0 0
01 Secure enabled, secure state debug enabled 1 1
10 Secure enabled, secure state debug disabled 1 0
11 Secure state disabled 0 0
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9.7 Security Bit
The security bit allows the entire device to be locked from external JTAG, aWire, or other debug
access for code security. The security bit can be written by a dedicated command, Set Security
Bit (SSB). Once set, the only way to clear the security bit is through the JTAG or aWire Chip
Erase command.
Once the security bit is set, the following Flash Controller commands will be unavailable and
return a lock error if attempted:
• Write General-Purpose Fuse Bit (WGPB) to BOOTPROT or EPFL fuses
• Erase General-Purpose Fuse Bit (EGPB) to BOOTPROT or EPFL fuses
• Program General-Purpose Fuse Byte (PGPFB) of fuse byte 2
• Erase All General-Purpose Fuses (EAGPF)
One error can be detected in the FSR register after issuing the command:
• Programming Error: A bad keyword and/or an invalid command have been written in the
FCMD register.
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9.8 User Interface
Note: 1. The value of the Lock bits depend on their programmed state. All other bits in FSR are 0.
2. All bits in FGPRHI/LO are dependent on the programmed state of the fuses they map to. Any bits in these registers not
mapped to a fuse read as 0.
3. The reset values for these registers are device specific. Please refer to the Module Configuration section at the end of this
chapter.
Table 9-6. FLASHCDW Register Memory Map
Offset Register Register Name Access Reset
0x00 Flash Control Register FCR Read/Write 0x00000000
0x04 Flash Command Register FCMD Read/Write 0x00000000
0x08 Flash Status Register FSR Read-only -(1)
0x0C Flash Parameter Register FPR Read-only -(3)
0x10 Flash Version Register FVR Read-only -(3)
0x14 Flash General Purpose Fuse Register Hi FGPFRHI Read-only -(2)
0x18 Flash General Purpose Fuse Register Lo FGPFRLO Read-only -(2)
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9.8.1 Flash Control Register
Name: FCR
Access Type: Read/Write
Offset: 0x00
Reset Value: 0x00000000
• BRBUF: Branch Target Instruction Buffer Enable
0: The Branch Target Instruction Buffer is disabled.
1: The Branch Target Instruction Buffer is enabled.
• SEQBUF: Sequential Instruction Fetch Buffer Enable
0: The Sequential Instruction Fetch Buffer is disabled.
1: The Sequential Instruction Fetch Buffer is enabled.
• FWS: Flash Wait State
0: The flash is read with 0 wait states.
1: The flash is read with 1 wait state.
• PROGE: Programming Error Interrupt Enable
0: Programming Error does not generate an interrupt request.
1: Programming Error generates an interrupt request.
• LOCKE: Lock Error Interrupt Enable
0: Lock Error does not generate an interrupt request.
1: Lock Error generates an interrupt request.
• FRDY: Flash Ready Interrupt Enable
0: Flash Ready does not generate an interrupt request.
1: Flash Ready generates an interrupt request.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - BRBUF SEQBUF -
76543210
- FWS - - PROGE LOCKE - FRDY
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9.8.2 Flash Command Register
Name: FCMD
Access Type: Read/Write
Offset: 0x04
Reset Value: 0x00000000
The FCMD can not be written if the flash is in the process of performing a flash command. Doing
so will cause the FCR write to be ignored, and the PROGE bit in FSR to be set.
• KEY: Write protection key
This field should be written with the value 0xA5 to enable the command defined by the bits of the register. If the field is written
with a different value, the write is not performed and no action is started.
This field always reads as 0.
• PAGEN: Page number
The PAGEN field is used to address a page or fuse bit for certain operations. In order to simplify programming, the PAGEN field
is automatically updated every time the page buffer is written to. For every page buffer write, the PAGEN field is updated with the
page number of the address being written to. Hardware automatically masks writes to the PAGEN field so that only bits
representing valid page numbers can be written, all other bits in PAGEN are always 0. As an example, in a flash with 1024
pages (page 0 - page 1023), bits 15:10 will always be 0.
31 30 29 28 27 26 25 24
KEY
23 22 21 20 19 18 17 16
PAGEN [15:8]
15 14 13 12 11 10 9 8
PAGEN [7:0]
76543210
- - CMD
Table 9-7. Semantic of PAGEN field in different commands
Command PAGEN description
No operation Not used
Write Page The number of the page to write
Clear Page Buffer Not used
Lock region containing given Page Page number whose region should be locked
Unlock region containing given Page Page number whose region should be unlocked
Erase All Not used
Write General-Purpose Fuse Bit GPFUSE #
Erase General-Purpose Fuse Bit GPFUSE #
Set Security Bit Not used
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• CMD: Command
This field defines the flash command. Issuing any unused command will cause the Programming Error bit in FSR to be set, and
the corresponding interrupt to be requested if the PROGE bit in FCR is one.
Program GP Fuse Byte WriteData[7:0], ByteAddress[2:0]
Erase All GP Fuses Not used
Quick Page Read Page number
Write User Page Not used
Erase User Page Not used
Quick Page Read User Page Not used
High Speed Mode Enable Not used
High Speed Mode Disable Not used
Table 9-8. Set of commands
Command Value Mnemonic
No operation 0 NOP
Write Page 1 WP
Erase Page 2 EP
Clear Page Buffer 3 CPB
Lock region containing given Page 4 LP
Unlock region containing given Page 5 UP
Erase All 6 EA
Write General-Purpose Fuse Bit 7 WGPB
Erase General-Purpose Fuse Bit 8 EGPB
Set Security Bit 9 SSB
Program GP Fuse Byte 10 PGPFB
Erase All GPFuses 11 EAGPF
Quick Page Read 12 QPR
Write User Page 13 WUP
Erase User Page 14 EUP
Quick Page Read User Page 15 QPRUP
High Speed Mode Enable 16 HSEN
High Speed Mode Disable 17 HSDIS
RESERVED 16-31
Table 9-7. Semantic of PAGEN field in different commands
Command PAGEN description
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9.8.3 Flash Status Register
Name: FSR
Access Type: Read-only
Offset: 0x08
Reset Value: 0x00000000
• LOCKx: Lock Region x Lock Status
0: The corresponding lock region is not locked.
1: The corresponding lock region is locked.
• HSMODE: High-Speed Mode
0: High-speed mode disabled.
1: High-speed mode enabled.
• QPRR: Quick Page Read Result
0: The result is zero, i.e. the page is not erased.
1: The result is one, i.e. the page is erased.
• SECURITY: Security Bit Status
0: The security bit is inactive.
1: The security bit is active.
• PROGE: Programming Error Status
Automatically cleared when FSR is read.
0: No invalid commands and no bad keywords were written in the Flash Command Register FCMD.
1: An invalid command and/or a bad keyword was/were written in the Flash Command Register FCMD.
• LOCKE: Lock Error Status
Automatically cleared when FSR is read.
0: No programming of at least one locked lock region has happened since the last read of FSR.
1: Programming of at least one locked lock region has happened since the last read of FSR.
• FRDY: Flash Ready Status
0: The Flash Controller is busy and the application must wait before running a new command.
1: The Flash Controller is ready to run a new command.
31 30 29 28 27 26 25 24
LOCK15 LOCK14 LOCK13 LOCK12 LOCK11 LOCK10 LOCK9 LOCK8
23 22 21 20 19 18 17 16
LOCK7 LOCK6 LOCK5 LOCK4 LOCK3 LOCK2 LOCK1 LOCK0
15 14 13 12 11 10 9 8
--------
76543210
- HSMODE QPRR SECURITY PROGE LOCKE - FRDY
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9.8.4 Flash Parameter Register
Name: FPR
Access Type: Read-only
Offset: 0x0C
Reset Value: -
• PSZ: Page Size
The size of each flash page.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - PSZ
76543210
- - - - FSZ
Table 9-9. Flash Page Size
PSZ Page Size
0 32 Byte
1 64 Byte
2 128 Byte
3 256 Byte
4 512 Byte
5 1024 Byte
6 2048 Byte
7 4096 Byte
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• FSZ: Flash Size
The size of the flash. Not all device families will provide all flash sizes indicated in the table.
Table 9-10. Flash Size
FSZ Flash Size FSZ Flash Size
0 4 Kbyte 8 192 Kbyte
1 8 Kbyte 9 256 Kbyte
2 16 Kbyte 10 384 Kbyte
3 32 Kbyte 11 512 Kbyte
4 48 Kbyte 12 768 Kbyte
5 64 Kbyte 13 1024 Kbyte
6 96 Kbyte 14 2048 Kbyte
7 128 Kbyte 15 Reserved
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9.8.5 Flash Version Register
Name: FVR
Access Type: Read-only
Offset: 0x10
Reset Value: 0x00000000
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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9.8.6 Flash General Purpose Fuse Register High
Name: FGPFRHI
Access Type: Read-only
Offset: 0x14
Reset Value: -
This register is only used in systems with more than 32 GP fuses.
• GPFxx: General Purpose Fuse xx
0: The fuse has a written/programmed state.
1: The fuse has an erased state.
31 30 29 28 27 26 25 24
GPF63 GPF62 GPF61 GPF60 GPF59 GPF58 GPF57 GPF56
23 22 21 20 19 18 17 16
GPF55 GPF54 GPF53 GPF52 GPF51 GPF50 GPF49 GPF48
15 14 13 12 11 10 9 8
GPF47 GPF46 GPF45 GPF44 GPF43 GPF42 GPF41 GPF40
76543210
GPF39 GPF38 GPF37 GPF36 GPF35 GPF34 GPF33 GPF32
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9.8.7 Flash General Purpose Fuse Register Low
Name: FGPFRLO
Access Type: Read-only
Offset: 0x18
Reset Value: -
• GPFxx: General Purpose Fuse xx
0: The fuse has a written/programmed state.
1: The fuse has an erased state.
31 30 29 28 27 26 25 24
GPF31 GPF30 GPF29 GPF28 GPF27 GPF26 GPF25 GPF24
23 22 21 20 19 18 17 16
GPF23 GPF22 GPF21 GPF20 GPF19 GPF18 GPF17 GPF16
15 14 13 12 11 10 9 8
GPF15 GPF14 GPF13 GPF12 GPF11 GPF10 GPF09 GPF08
76543210
GPF07 GPF06 GPF05 GPF04 GPF03 GPF02 GPF01 GPF00
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9.9 Fuse Settings
The flash contains 32 general purpose fuses. These 32 fuses can be found in the Flash General
Purpose Fuse Register Low (FGPFRLO). The Flash General Purpose Fuse Register High
(FGPFRHI) is not used. In addition to the general purpose fuses, parts of the flash user page
can have a defined meaning outside of the flash controller and will also be described in this
section.
Note that when writing to the user page the values do not get loaded by the other modules on
the device until a chip reset occurs.
The general purpose fuses are erased by a JTAG or aWire chip erase.
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9.9.1 Flash General Purpose Fuse Register Low (FGPFRLO)
• BODEN: Brown Out Detector Enable
• BODHYST: Brown Out Detector Hysteresis
0: The Brown out detector hysteresis is disabled
1: The Brown out detector hysteresis is enabled
• BODLEVEL: Brown Out Detector Trigger Level
This controls the voltage trigger level for the Brown out detector. Refer to ”Electrical Characteristics” on page 897.
• UPROT, SECURE, BOOTPROT, EPFL, LOCK
These are Flash Controller fuses and are described in the FLASHCDW section.
9.9.1.1 Default Fuse Value
The devices are shipped with the FGPFRLO register value:0xE07FFFFF:
• BODEN fuses set to 11. BOD is disabled.
• BODHYST fuse set to 1. The BOD hysteresis is enabled.
• BODLEVEL fuses set to 000000. This is the minimum voltage trigger level for BOD. This level
is lower than the POR level, so when BOD is enabled, it will never trigger with this default
value.
• UPROT fuse set to 1.
• SECURE fuse set to 11.
• BOOTPROT fuses set to 111. The bootloader protection is disabled.
• EPFL fuse set to 1. External privileged fetch is not locked.
• LOCK fuses set to 1111111111111111. No region locked.
After the JTAG or aWire chip erase command, the FGPFR register value is 0xFFFFFFFF.
31 30 29 28 27 26 25 24
BODEN BODHYST BODLEVEL[5:1]
23 22 21 20 19 18 17 16
BODLEVEL[0] UPROT SECURE BOOTPROT EPFL
15 14 13 12 11 10 9 8
LOCK[15:8]
7 6543210
LOCK[7:0]
BODEN Description
00 BOD disabled
01 BOD enabled, BOD reset enabled
10 BOD enabled, BOD reset disabled
11 BOD disabled
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9.9.2 First Word of the User Page (Address 0x80800000)
• WDTAUTO: WatchDog Timer Auto Enable at Startup
0: The WDT is automatically enabled at startup.
1: The WDT is not automatically enabled at startup.
Please refer to the WDT chapter for detail about timeout settings when the WDT is automatically enabled.
9.9.2.1 Default user page first word value
The devices are shipped with the user page erased (all bits 1):
• WDTAUTO set to 1, WDT disabled.
31 30 29 28 27 26 25 24
- -------
23 22 21 20 19 18 17 16
- -------
15 14 13 12 11 10 9 8
- -------
7 6543210
- - - - - - - WDTAUTO
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9.9.3 Second Word of the User Page (Address 0x80800004)
• SSADRR: Secure State End Address for the RAM
• SSADRF: Secure State End Address for the Flash
9.9.3.1 Default user page second word value
The devices are shipped with the User page erased (all bits 1).
9.10 Serial Number
Each device has a unique 120 bits serial number readable from address 0x8080020C to
0x8080021A.
9.11 Module Configuration
The specific configuration for each FLASHCDW instance is listed in the following tables.The
module bus clocks listed here are connected to the system bus clocks. Please refer to the Power
Manager chapter for details.
31 30 29 28 27 26 25 24
SSADRR[15:8]
23 22 21 20 19 18 17 16
SSADRR[7:0]
15 14 13 12 11 10 9 8
SSADRF[15:8]
7 6543210
SSADRF[7:0]
Table 9-11. Module Configuration
Feature
ATUC256L3U,
ATUC256L4U
ATUC128L3U,
ATUC128L4U
ATUC64L3U,
ATUC64L4U
Flash size 256Kbytes 128Kbytes 64Kbytes
Number of pages 512 256 128
Page size 512 bytes 512 bytes 512 bytes
Table 9-12. Module Clock Name
Module Name Clock Name Description
FLASHCDW
CLK_FLASHCDW_HSB Clock for the FLASHCDW HSB interface
CLK_FLASHCDW_PB Clock for the FLASHCDW PB interface
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Table 9-13. Register Reset Values
Register
ATUC256L3U,
ATUC256L4U
ATUC128L3U,
ATUC128L4U
ATUC64L3U,
ATUC64L4U
FVR 0x00000120 0x00000120 0x00000120
FPR 0x00000409 0x00000407 0x00000405
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10. Secure Access Unit (SAU)
Rev: 1.1.1.3
10.1 Features
• Remaps registers in memory regions protected by the MPU to regions not protected by the MPU
• Programmable physical address for each channel
• Two modes of operation: Locked and Open
– In Locked Mode, access to a channel must be preceded by an unlock action
• An unlocked channel remains open only for a specific amount of time, if no access is
performed during this time, the channel is relocked
• Only one channel can be open at a time, opening a channel while another one is open
locks the first one
• Access to a locked channel is denied, a bus error and optionally an interrupt is returned
• If a channel is relocked due to an unlock timeout, an interrupt can optionally be
generated
– In Open Mode, all channels are permanently unlocked
10.2 Overview
In many systems, erroneous access to peripherals can lead to catastrophic failure. An example
of such a peripheral is the Pulse Width Modulator (PWM) used to control electric motors. The
PWM outputs a pulse train that controls the motor. If the control registers of the PWM module
are inadvertently updated with wrong values, the motor can start operating out of control, possibly
causing damage to the application and the surrounding environment. However, sometimes
the PWM control registers must be updated with new values, for example when modifying the
pulse train to accelerate the motor. A mechanism must be used to protect the PWM control registers
from inadvertent access caused by for example:
• Errors in the software code
• Transient errors in the CPU caused by for example electrical noise altering the execution path
of the program
To improve the security in a computer system, the AVR32UC implements a Memory Protection
Unit (MPU). The MPU can be set up to limit the accesses that can be performed to specific
memory addresses. The MPU divides the memory space into regions, and assigns a set of
access restrictions on each region. Access restrictions can for example be read/write if the CPU
is in supervisor mode, and read-only if the CPU is in application mode. The regions can be of different
size, but each region is usually quite large, e.g. protecting 1 kilobyte of address space or
more. Furthermore, access to each region is often controlled by the execution state of the CPU,
i.e. supervisor or application mode. Such a simple control mechanism is often too inflexible (too
coarse-grained chunks) and with too much overhead (often requiring system calls to access protected
memory locations) for simple or real-time systems such as embedded microcontrollers.
Usually, the Secure Access Unit (SAU) is used together with the MPU to provide the required
security and integrity. The MPU is set up to protect regions of memory, while the SAU is set up
to provide a secure channel into specific memory locations that are protected by the MPU.
These specific locations can be thought of as fine-grained overrides of the general coarsegrained
protection provided by the MPU.
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10.3 Block Diagram
Figure 10-1 presents the SAU integrated in an example system with a CPU, some memories,
some peripherals, and a bus system. The SAU is connected to both the Peripheral Bus (PB) and
the High Speed Bus (HSB). Configuration of the SAU is done via the PB, while memory
accesses are done via the HSB. The SAU receives an access on its HSB slave interface,
remaps it, checks that the channel is unlocked, and if so, initiates a transfer on its HSB master
interface to the remapped address.
The thin arrows in Figure 10-1 exemplifies control flow when using the SAU. The CPU wants to
read the RX Buffer in the USART. The MPU has been configured to protect all registers in the
USART from user mode access, while the SAU has been configured to remap the RX Buffer into
a memory space that is not protected by the MPU. This unprotected memory space is mapped
into the SAU HSB slave space. When the CPU reads the appropriate address in the SAU, the
SAU will perform an access to the desired RX buffer register in the USART, and thereafter return
the read results to the CPU. The return data flow will follow the opposite direction of the control
flow arrows in Figure 10-1.
Figure 10-1. SAU Block Diagram
SAU Channel
Bus master
MPU
CPU
Bus slave
USART
PWM
Bus slave Bus master
Bus slave
Flash
Bus slave
RAM
Bus bridge
SAU Configuration
Interrupt
request
High Speed Bus
SAU
Peripheral Bus
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10.4 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
10.4.1 Power Management
If the CPU enters a sleep mode that disables clocks used by the SAU, the SAU will stop functioning
and resume operation after the system wakes up from sleep mode.
10.4.2 Clocks
The SAU has two bus clocks connected: One High Speed Bus clock (CLK_SAU_HSB) and one
Peripheral Bus clock (CLK_SAU_PB). These clocks are generated by the Power Manager. Both
clocks are enabled at reset, and can be disabled by writing to the Power Manager. The user has
to ensure that CLK_SAU_HSB is not turned off before accessing the SAU. Likewise, the user
must ensure that no bus access is pending in the SAU before disabling CLK_SAU_HSB. Failing
to do so may deadlock the High Speed Bus.
10.4.3 Interrupt
The SAU interrupt request line is connected to the interrupt controller. Using the SAU interrupt
requires the interrupt controller to be programmed first.
10.4.4 Debug Operation
When an external debugger forces the CPU into debug mode, the SAU continues normal operation.
If the SAU is configured in a way that requires it to be periodically serviced by the CPU
through interrupts or similar, improper operation or data loss may result during debugging.
10.5 Functional Description
10.5.1 Enabling the SAU
The SAU is enabled by writing a one to the Enable (EN) bit in the Control Register (CR). This will
set the SAU Enabled (EN) bit in the Status Register (SR).
10.5.2 Configuring the SAU Channels
The SAU has a set of channels, mapped in the HSB memory space. These channels can be
configured by a Remap Target Register (RTR), located at the same memory address. When the
SAU is in normal mode, the SAU channel is addressed, and when the SAU is in setup mode, the
RTR can be addressed.
Before the SAU can be used, the channels must be configured and enabled. To configure a
channel, the corresponding RTR must be programmed with the Remap Target Address. To do
this, make sure the SAU is in setup mode by writing a one to the Setup Mode Enable (SEN) bit
in CR. This makes sure that a write to the RTR address accesses the RTR, not the SAU channel.
Thereafter, the RTR is written with the address to remap to, typically the address of a
specific PB register. When all channels have been configured, return to normal mode by writing
a one to the Setup Mode Disable (SDIS) in CR. The channels can now be enabled by writing
ones to the corresponding bits in the Channel Enable Registers (CERH/L).
The SAU is only able to remap addresses above 0xFFFC0000.
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10.5.2.1 Protecting SAU configuration registers
In order to prevent the SAU configuration registers to be changed by malicious or runaway code,
they should be protected by the MPU as soon as they have been configured. Maximum security
is provided in the system if program memory does not contain any code to unprotect the configuration
registers in the MPU. This guarantees that runaway code can not accidentally unprotect
and thereafter change the SAU configuration registers.
10.5.3 Lock Mechanism
The SAU can be configured to use two different access mechanisms: Open and Locked. In
Open Mode, SAU channels can be accessed freely after they have been configured and
enabled. In order to prevent accidental accesses to remapped addresses, it is possible to configure
the SAU in Locked Mode. Writing a one to the Open Mode bit in the CONFIG register
(CONFIG.OPEN) will enable Open Mode. Writing a zero to CONFIG.OPEN will enable Locked
Mode.
When using Locked Mode, the lock mechanism must be configured by writing a user defined key
value to the Unlock Key (UKEY) field in the Configuration Register (CONFIG). The number of
CLK_SAU_HSB cycles the channel remains unlocked must be written to the Unlock Number of
Clock Cycles (UCYC) field in CONFIG.
Access control to the SAU channels is enabled by means of the Unlock Register (UR), which
resides in the same address space as the SAU channels. Before a channel can be accessed,
the unlock register must be written with th correct key and channel number (single write access).
Access to the channel is then permitted for the next CONFIG.UCYC clock cycles, or until a successful
access to the unlocked channel has been made.
Only one channel can be unlocked at a time. If any other channel is unlocked at the time of writing
UR, this channel will be automatically locked before the channel addressed by the UR write
is unlocked.
An attempted access to a locked channel will be aborted, and the Channel Access Unsuccessful
bit (SR.CAU) will be set.
Any pending errors bits in SR must be cleared before it is possible to access UR. The following
SR bits are defined as error bits: EXP, CAU, URREAD, URKEY, URES, MBERROR, RTRADR.
If any of these bits are set while writing to UR, the write is aborted and the Unlock Register Error
Status (URES) bit in SR is set.
10.5.4 Normal Operation
The following sequence must be used in order to access a SAU channel in normal operation
(CR.SEN=0):
1. If not in Open Mode, write the unlock key to UR.KEY and the channel number to
UR.CHANNEL.
2. Perform the read or write operation to the SAU channel. If not in Open Mode, this must
be done within CONFIG.UCYC clock cycles of unlocking the channel. The SAU will use
its HSB master interface to remap the access to the target address pointed to by the
corresponding RTR.
3. To confirm that the access was successful, wait for the IDLE transfer status bit
(SR.IDLE) to indicate the operation is completed. Then check SR for possible error conditions.
The SAU can be configured to generate interrupt requests or a Bus Error
Exception if the access failed.
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10.5.4.1 Operation example
Figure 10-2 shows a typical memory map, consisting of some memories, some simple peripherals,
and a SAU with multiple channels and an Unlock Register (UR). Imagine that the MPU has
been set up to disallow all accesses from the CPU to the grey modules. Thus the CPU has no
way of accessing for example the Transmit Holding register in the UART, present on address X
on the bus. Note that the SAU RTRs are not protected by the MPU, thus the RTRs can be
accessed. If for example RTR0 is configured to point to address X, an access to RTR0 will be
remapped by the SAU to address X according to the algorithm presented above. By programming
the SAU RTRs, specific addresses in modules that have generally been protected by the
MPU can be performed.
Figure 10-2. Example Memory Map for a System with SAU
10.5.5 Interrupts
The SAU can generate an interrupt request to signal different events. All events that can generate
an interrupt request have dedicated bits in the Status Register (SR). An interrupt request will
be generated if the corresponding bit in the Interrupt Mask Register (IMR) is set. Bits in IMR are
set by writing a one to the corresponding bit in the Interrupt Enable Register (IER), and cleared
by writing a one to the corresponding bit in the Interrupt Disable Register (IDR). The interrupt
request remains active until the corresponding bit in SR is cleared by writing a one to the corresponding
bit in the Interrupt Clear Register (ICR).
The following SR bits are used for signalling the result of SAU accesses:
• RTR Address Error (RTRADR) is set if an illegal address is written to the RTRs. Only
addresses in the range 0xFFFC0000-0xFFFFFFFF are allowed.
• Master Interface Bus Error (MBERROR) is set if any of the conditions listed in Section 10.5.7
occurred.
Transmit Holding
Baudrate
Control
Receive Holding
Channel 1
RTR0
RTR1
Address X
Address Z
UART
SAU
CONFIG
SAU
CHANNEL
UR
RTR62 ...
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• Unlock Register Error Status (URES) is set if an attempt was made to unlock a channel by
writing to the Unlock Register while one or more error bits in SR were set (see Section
10.5.6). The unlock operation was aborted.
• Unlock Register Key Error (URKEY) is set if the Unlock Register was attempted written with
an invalid key.
• Unlock Register Read (URREAD) is set if the Unlock Register was attempted read.
• Channel Access Unsuccessful (CAU) is set if the channel access was unsuccessful.
• Channel Access Successful (CAS) is set if the channel access was successful.
• Channel Unlock Expired (EXP) is set if the channel lock expired, with no channel being
accessed after the channel was unlocked.
10.5.6 Error bits
If error bits are set when attempting to unlock a channel, SR.URES will be set. The following SR
bits are considered error bits:
• EXP
• CAU
• URREAD
• URKEY
• URES
• MBERROR
• RTRADR
10.5.7 Bus Error Responses
By writing a one to the Bus Error Response Enable bit (CR.BERREN), serious access errors will
be configured to return a bus error to the CPU. This will cause the CPU to execute its Bus Error
Data Fetch exception routine.
The conditions that can generate a bus error response are:
• Reading the Unlock Register
• Trying to access a locked channel
• The SAU HSB master receiving a bus error response from its addressed slave
10.5.8 Disabling the SAU
To disable the SAU, the user must first ensure that no SAU bus operations are pending. This
can be done by checking that the SR.IDLE bit is set.
The SAU may then be disabled by writing a one to the Disable (DIS) bit in CR.
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10.6 User Interface
The following addresses are used by SAU channel configuration registers. All offsets are relative to the SAU’s PB base
address.
Note: 1. The reset values are device specific. Please refer to the Module Configuration section at the end of this chapter.
The following addresses are used by SAU channel registers. All offsets are relative to the SAU’s HSB base address. The
number of channels implemented is device specific, refer to the Module Configuration section at the end of this chapter.
Table 10-1. SAU Configuration Register Memory Map
Offset Register Register Name Access Reset
0x00 Control Register CR Write-only 0x00000000
0x04 Configuration Register CONFIG Write-only 0x00000000
0x08 Channel Enable Register High CERH Read/Write 0x00000000
0x0C Channel Enable Register Low CERL Read/Write 0x00000000
0x10 Status Register SR Read-only 0x00000400
0x14 Interrupt Enable Register IER Write-only 0x00000000
0x18 Interrupt Disable Register IDR Write-only 0x00000000
0x1C Interrupt Mask Register IMR Read-only 0x00000000
0x20 Interrupt Clear Register ICR Write-only 0x00000000
0x24 Parameter Register PARAMETER Read-only -(1)
0x28 Version Register VERSION Read-only -(1)
Table 10-2. SAU Channel Register Memory Map
Offset Register Register Name Access Reset
0x00 Remap Target Register 0 RTR0 Read/Write N/A
0x04 Remap Target Register 1 RTR1 Read/Write N/A
0x08 Remap Target Register 2 RTR2 Read/Write N/A
... ... ... ... ...
0x04*n Remap Target Register n RTRn Read/Write N/A
0xFC Unlock Register UR Write-only N/A
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10.6.1 Control Register
Name: CR
Access Type: Write-only
Offset: 0x00
Reset Value: 0x00000000
• BERRDIS: Bus Error Response Disable
Writing a zero to this bit has no effect.
Writing a one to this bit disables Bus Error Response from the SAU.
• BERREN: Bus Error Response Enable
Writing a zero to this bit has no effect.
Writing a one to this bit enables Bus Error Response from the SAU.
• SDIS: Setup Mode Disable
Writing a zero to this bit has no effect.
Writing a one to this bit exits setup mode.
• SEN: Setup Mode Enable
Writing a zero to this bit has no effect.
Writing a one to this bit enters setup mode.
• DIS: SAU Disable
Writing a zero to this bit has no effect.
Writing a one to this bit disables the SAU.
• EN: SAU Enable
Writing a zero to this bit has no effect.
Writing a one to this bit enables the SAU.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - BERRDIS BERREN SDIS SEN DIS EN
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10.6.2 Configuration Register
Name: CONFIG
Access Type: Write-only
Offset: 0x04
Reset Value: 0x00000000
• OPEN: Open Mode Enable
Writing a zero to this bit disables open mode.
Writing a one to this bit enables open mode.
• UCYC: Unlock Number of Clock Cycles
Once a channel has been unlocked, it remains unlocked for this amount of CLK_SAU_HSB clock cycles or until one access to a
channel has been made.
• UKEY: Unlock Key
The value in this field must be written to UR.KEY to unlock a channel.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - - - - OPEN
15 14 13 12 11 10 9 8
UCYC
76543210
UKEY
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10.6.3 Channel Enable Register High
Name: CERH
Access Type: Read/Write
Offset: 0x08
Reset Value: 0x00000000
• CERH[n]: Channel Enable Register High
0: Channel (n+32) is not enabled.
1: Channel (n+32) is enabled.
31 30 29 28 27 26 25 24
- CERH[30:24]
23 22 21 20 19 18 17 16
CERH[23:16]
15 14 13 12 11 10 9 8
CERH[15:8]
76543210
CERH[7:0]
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10.6.4 Channel Enable Register Low
Name: CERL
Access Type: Read/Write
Offset: 0x0C
Reset Value: 0x00000000
• CERL[n]: Channel Enable Register Low
0: Channel n is not enabled.
1: Channel n is enabled.
31 30 29 28 27 26 25 24
CERL[31:24]
23 22 21 20 19 18 17 16
CERL[23:16]
15 14 13 12 11 10 9 8
CERL[15:8]
76543210
CERL[7:0]
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10.6.5 Status Register
Name: SR
Access Type: Read-only
Offset: 0x10
Reset Value: 0x00000400
• IDLE
This bit is cleared when a read or write operation to the SAU channel is started.
This bit is set when the operation is completed and no SAU bus operations are pending.
• SEN: SAU Setup Mode Enable
This bit is cleared when the SAU exits setup mode.
This bit is set when the SAU enters setup mode.
• EN: SAU Enabled
This bit is cleared when the SAU is disabled.
This bit is set when the SAU is enabled.
• RTRADR: RTR Address Error
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set if, in the configuration phase, an RTR was written with an illegal address, i.e. the upper 16 bits in the address were
different from 0xFFFC, 0xFFFD, 0xFFFE or 0xFFFF.
• MBERROR: Master Interface Bus Error
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set if a channel access generated a transfer on the master interface that received a bus error response from the
addressed slave.
• URES: Unlock Register Error Status
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set if an attempt was made to unlock a channel by writing to the Unlock Register while one or more error bits were set
in SR. The unlock operation was aborted.
• URKEY: Unlock Register Key Error
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set if the Unlock Register was attempted written with an invalid key.
• URREAD: Unlock Register Read
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set if the Unlock Register was read.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - IDLE SEN EN
76543210
RTRADR MBERROR URES URKEY URREAD CAU CAS EXP
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• CAU: Channel Access Unsuccessful
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set if channel access was unsuccessful, i.e. an access was attempted to a locked or disabled channel.
• CAS: Channel Access Successful
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set if channel access successful, i.e. one access was made after the channel was unlocked.
• EXP: Channel Unlock Expired
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set if channel unlock has expired, i.e. no access being made after the channel was unlocked.
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10.6.6 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x14
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
RTRADR MBERROR URES URKEY URREAD CAU CAS EXP
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10.6.7 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x18
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
RTRADR MBERROR URES URKEY URREAD CAU CAS EXP
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10.6.8 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x1C
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
RTRADR MBERROR URES URKEY URREAD CAU CAS EXP
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10.6.9 Interrupt Clear Register
Name: ICR
Access Type: Write-only
Offset: 0x20
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in SR and any corresponding interrupt request.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
RTRADR MBERROR URES URKEY URREAD CAU CAS EXP
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10.6.10 Parameter Register
Name: PARAMETER
Access Type: Read-only
Offset: 0x24
Reset Value: -
• CHANNELS:
Number of channels implemented.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - CHANNELS
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10.6.11 Version Register
Name: VERSION
Access Type: Write-only
Offset: 0x28
Reset Value: -
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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10.6.12 Remap Target Register n
Name: RTRn
Access Type: Read/Write
Offset: n*4
Reset Value: 0x00000000
• RTR: Remap Target Address for Channel n
RTR[31:16] must have one of the following values, any other value will result in UNDEFINED behavior:
0xFFFC
0xFFFD
0xFFFE
0xFFFF
RTR[1:0] must be written to 00, any other value will result in UNDEFINED behavior.
31 30 29 28 27 26 25 24
RTR[31:24]
23 22 21 20 19 18 17 16
RTR[23:16]
15 14 13 12 11 10 9 8
RTR[15:8]
76543210
RTR[7:0]
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10.6.13 Unlock Register
Name: UR
Access Type : Write-only
Offset: 0xFC
Reset Value: 0x00000000
• KEY: Unlock Key
The correct key must be written in order to unlock a channel. The key value written must correspond to the key value defined in
CONFIG.UKEY.
• CHANNEL: Channel Number
Number of the channel to unlock.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
KEY
76543210
- - CHANNEL
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10.7 Module Configuration
The specific configuration for each SAU instance is listed in the following tables.The module bus
clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 10-3. SAU configuration
Feature SAU
SAU Channels 16
Table 10-4. SAU clock name
Module name Clock name Description
SAU CLK_SAU_HSB Clock for the SAU HSB interface
SAU CLK_SAU_PB Clock for the SAU PB interface
Table 10-5. Register Reset Values
Register Reset Value
VERSION 0x00000111
PARAMETER 0x00000010
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11. HSB Bus Matrix (HMATRIXB)
Rev: 1.3.0.3
11.1 Features
• User Interface on peripheral bus
• Configurable number of masters (up to 16)
• Configurable number of slaves (up to 16)
• One decoder for each master
• Programmable arbitration for each slave
– Round-Robin
– Fixed priority
• Programmable default master for each slave
– No default master
– Last accessed default master
– Fixed default master
• One cycle latency for the first access of a burst
• Zero cycle latency for default master
• One special function register for each slave (not dedicated)
11.2 Overview
The Bus Matrix implements a multi-layer bus structure, that enables parallel access paths
between multiple High Speed Bus (HSB) masters and slaves in a system, thus increasing the
overall bandwidth. The Bus Matrix interconnects up to 16 HSB Masters to up to 16 HSB Slaves.
The normal latency to connect a master to a slave is one cycle except for the default master of
the accessed slave which is connected directly (zero cycle latency). The Bus Matrix provides 16
Special Function Registers (SFR) that allow the Bus Matrix to support application specific
features.
11.3 Product Dependencies
In order to configure this module by accessing the user registers, other parts of the system must
be configured correctly, as described below.
11.3.1 Clocks
The clock for the HMATRIX bus interface (CLK_HMATRIX) is generated by the Power Manager.
This clock is enabled at reset, and can be disabled in the Power Manager.
11.4 Functional Description
11.4.1 Special Bus Granting Mechanism
The Bus Matrix provides some speculative bus granting techniques in order to anticipate access
requests from some masters. This mechanism reduces latency at first access of a burst or single
transfer. This bus granting mechanism sets a different default master for every slave.
At the end of the current access, if no other request is pending, the slave remains connected to
its associated default master. A slave can be associated with three kinds of default masters: no
default master, last access master, and fixed default master.
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To change from one kind of default master to another, the Bus Matrix user interface provides the
Slave Configuration Registers, one for each slave, that set a default master for each slave. The
Slave Configuration Register contains two fields: DEFMSTR_TYPE and FIXED_DEFMSTR. The
2-bit DEFMSTR_TYPE field selects the default master type (no default, last access master, fixed
default master), whereas the 4-bit FIXED_DEFMSTR field selects a fixed default master provided
that DEFMSTR_TYPE is set to fixed default master. Please refer to the Bus Matrix user
interface description.
11.4.1.1 No Default Master
At the end of the current access, if no other request is pending, the slave is disconnected from
all masters. No Default Master suits low-power mode.
11.4.1.2 Last Access Master
At the end of the current access, if no other request is pending, the slave remains connected to
the last master that performed an access request.
11.4.1.3 Fixed Default Master
At the end of the current access, if no other request is pending, the slave connects to its fixed
default master. Unlike last access master, the fixed master does not change unless the user
modifies it by a software action (field FIXED_DEFMSTR of the related SCFG).
11.4.2 Arbitration
The Bus Matrix provides an arbitration mechanism that reduces latency when conflict cases
occur, i.e. when two or more masters try to access the same slave at the same time. One arbiter
per HSB slave is provided, thus arbitrating each slave differently.
The Bus Matrix provides the user with the possibility of choosing between 2 arbitration types for
each slave:
1. Round-Robin Arbitration (default)
2. Fixed Priority Arbitration
This is selected by the ARBT field in the Slave Configuration Registers (SCFG).
Each algorithm may be complemented by selecting a default master configuration for each
slave.
When a re-arbitration must be done, specific conditions apply. This is described in “Arbitration
Rules” .
11.4.2.1 Arbitration Rules
Each arbiter has the ability to arbitrate between two or more different master requests. In order
to avoid burst breaking and also to provide the maximum throughput for slave interfaces, arbitration
may only take place during the following cycles:
1. Idle Cycles: When a slave is not connected to any master or is connected to a master
which is not currently accessing it.
2. Single Cycles: When a slave is currently doing a single access.
3. End of Burst Cycles: When the current cycle is the last cycle of a burst transfer. For
defined length burst, predicted end of burst matches the size of the transfer but is managed
differently for undefined length burst. This is described below.
4. Slot Cycle Limit: When the slot cycle counter has reached the limit value indicating that
the current master access is too long and must be broken. This is described below.
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• Undefined Length Burst Arbitration
In order to avoid long slave handling during undefined length bursts (INCR), the Bus Matrix provides
specific logic in order to re-arbitrate before the end of the INCR transfer. A predicted end
of burst is used as a defined length burst transfer and can be selected among the following five
possibilities:
1. Infinite: No predicted end of burst is generated and therefore INCR burst transfer will
never be broken.
2. One beat bursts: Predicted end of burst is generated at each single transfer inside the
INCP transfer.
3. Four beat bursts: Predicted end of burst is generated at the end of each four beat
boundary inside INCR transfer.
4. Eight beat bursts: Predicted end of burst is generated at the end of each eight beat
boundary inside INCR transfer.
5. Sixteen beat bursts: Predicted end of burst is generated at the end of each sixteen beat
boundary inside INCR transfer.
This selection can be done through the ULBT field in the Master Configuration Registers
(MCFG).
• Slot Cycle Limit Arbitration
The Bus Matrix contains specific logic to break long accesses, such as very long bursts on a
very slow slave (e.g., an external low speed memory). At the beginning of the burst access, a
counter is loaded with the value previously written in the SLOT_CYCLE field of the related Slave
Configuration Register (SCFG) and decreased at each clock cycle. When the counter reaches
zero, the arbiter has the ability to re-arbitrate at the end of the current byte, halfword, or word
transfer.
11.4.2.2 Round-Robin Arbitration
This algorithm allows the Bus Matrix arbiters to dispatch the requests from different masters to
the same slave in a round-robin manner. If two or more master requests arise at the same time,
the master with the lowest number is first serviced, then the others are serviced in a round-robin
manner.
There are three round-robin algorithms implemented:
1. Round-Robin arbitration without default master
2. Round-Robin arbitration with last default master
3. Round-Robin arbitration with fixed default master
• Round-Robin Arbitration without Default Master
This is the main algorithm used by Bus Matrix arbiters. It allows the Bus Matrix to dispatch
requests from different masters to the same slave in a pure round-robin manner. At the end of
the current access, if no other request is pending, the slave is disconnected from all masters.
This configuration incurs one latency cycle for the first access of a burst. Arbitration without
default master can be used for masters that perform significant bursts.
• Round-Robin Arbitration with Last Default Master
This is a biased round-robin algorithm used by Bus Matrix arbiters. It allows the Bus Matrix to
remove the one latency cycle for the last master that accessed the slave. At the end of the cur-
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rent transfer, if no other master request is pending, the slave remains connected to the last
master that performed the access. Other non privileged masters still get one latency cycle if they
want to access the same slave. This technique can be used for masters that mainly perform single
accesses.
• Round-Robin Arbitration with Fixed Default Master
This is another biased round-robin algorithm. It allows the Bus Matrix arbiters to remove the one
latency cycle for the fixed default master per slave. At the end of the current access, the slave
remains connected to its fixed default master. Every request attempted by this fixed default master
will not cause any latency whereas other non privileged masters will still get one latency
cycle. This technique can be used for masters that mainly perform single accesses.
11.4.2.3 Fixed Priority Arbitration
This algorithm allows the Bus Matrix arbiters to dispatch the requests from different masters to
the same slave by using the fixed priority defined by the user. If two or more master requests are
active at the same time, the master with the highest priority number is serviced first. If two or
more master requests with the same priority are active at the same time, the master with the
highest number is serviced first.
For each slave, the priority of each master may be defined through the Priority Registers for
Slaves (PRAS and PRBS).
11.4.3 Slave and Master assignation
The index number assigned to Bus Matrix slaves and masters are described in the Module Configuration
section at the end of this chapter.
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11.5 User Interface
Table 11-1. HMATRIX Register Memory Map
Offset Register Name Access Reset Value
0x0000 Master Configuration Register 0 MCFG0 Read/Write 0x00000002
0x0004 Master Configuration Register 1 MCFG1 Read/Write 0x00000002
0x0008 Master Configuration Register 2 MCFG2 Read/Write 0x00000002
0x000C Master Configuration Register 3 MCFG3 Read/Write 0x00000002
0x0010 Master Configuration Register 4 MCFG4 Read/Write 0x00000002
0x0014 Master Configuration Register 5 MCFG5 Read/Write 0x00000002
0x0018 Master Configuration Register 6 MCFG6 Read/Write 0x00000002
0x001C Master Configuration Register 7 MCFG7 Read/Write 0x00000002
0x0020 Master Configuration Register 8 MCFG8 Read/Write 0x00000002
0x0024 Master Configuration Register 9 MCFG9 Read/Write 0x00000002
0x0028 Master Configuration Register 10 MCFG10 Read/Write 0x00000002
0x002C Master Configuration Register 11 MCFG11 Read/Write 0x00000002
0x0030 Master Configuration Register 12 MCFG12 Read/Write 0x00000002
0x0034 Master Configuration Register 13 MCFG13 Read/Write 0x00000002
0x0038 Master Configuration Register 14 MCFG14 Read/Write 0x00000002
0x003C Master Configuration Register 15 MCFG15 Read/Write 0x00000002
0x0040 Slave Configuration Register 0 SCFG0 Read/Write 0x00000010
0x0044 Slave Configuration Register 1 SCFG1 Read/Write 0x00000010
0x0048 Slave Configuration Register 2 SCFG2 Read/Write 0x00000010
0x004C Slave Configuration Register 3 SCFG3 Read/Write 0x00000010
0x0050 Slave Configuration Register 4 SCFG4 Read/Write 0x00000010
0x0054 Slave Configuration Register 5 SCFG5 Read/Write 0x00000010
0x0058 Slave Configuration Register 6 SCFG6 Read/Write 0x00000010
0x005C Slave Configuration Register 7 SCFG7 Read/Write 0x00000010
0x0060 Slave Configuration Register 8 SCFG8 Read/Write 0x00000010
0x0064 Slave Configuration Register 9 SCFG9 Read/Write 0x00000010
0x0068 Slave Configuration Register 10 SCFG10 Read/Write 0x00000010
0x006C Slave Configuration Register 11 SCFG11 Read/Write 0x00000010
0x0070 Slave Configuration Register 12 SCFG12 Read/Write 0x00000010
0x0074 Slave Configuration Register 13 SCFG13 Read/Write 0x00000010
0x0078 Slave Configuration Register 14 SCFG14 Read/Write 0x00000010
0x007C Slave Configuration Register 15 SCFG15 Read/Write 0x00000010
0x0080 Priority Register A for Slave 0 PRAS0 Read/Write 0x00000000
0x0084 Priority Register B for Slave 0 PRBS0 Read/Write 0x00000000
0x0088 Priority Register A for Slave 1 PRAS1 Read/Write 0x00000000
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0x008C Priority Register B for Slave 1 PRBS1 Read/Write 0x00000000
0x0090 Priority Register A for Slave 2 PRAS2 Read/Write 0x00000000
0x0094 Priority Register B for Slave 2 PRBS2 Read/Write 0x00000000
0x0098 Priority Register A for Slave 3 PRAS3 Read/Write 0x00000000
0x009C Priority Register B for Slave 3 PRBS3 Read/Write 0x00000000
0x00A0 Priority Register A for Slave 4 PRAS4 Read/Write 0x00000000
0x00A4 Priority Register B for Slave 4 PRBS4 Read/Write 0x00000000
0x00A8 Priority Register A for Slave 5 PRAS5 Read/Write 0x00000000
0x00AC Priority Register B for Slave 5 PRBS5 Read/Write 0x00000000
0x00B0 Priority Register A for Slave 6 PRAS6 Read/Write 0x00000000
0x00B4 Priority Register B for Slave 6 PRBS6 Read/Write 0x00000000
0x00B8 Priority Register A for Slave 7 PRAS7 Read/Write 0x00000000
0x00BC Priority Register B for Slave 7 PRBS7 Read/Write 0x00000000
0x00C0 Priority Register A for Slave 8 PRAS8 Read/Write 0x00000000
0x00C4 Priority Register B for Slave 8 PRBS8 Read/Write 0x00000000
0x00C8 Priority Register A for Slave 9 PRAS9 Read/Write 0x00000000
0x00CC Priority Register B for Slave 9 PRBS9 Read/Write 0x00000000
0x00D0 Priority Register A for Slave 10 PRAS10 Read/Write 0x00000000
0x00D4 Priority Register B for Slave 10 PRBS10 Read/Write 0x00000000
0x00D8 Priority Register A for Slave 11 PRAS11 Read/Write 0x00000000
0x00DC Priority Register B for Slave 11 PRBS11 Read/Write 0x00000000
0x00E0 Priority Register A for Slave 12 PRAS12 Read/Write 0x00000000
0x00E4 Priority Register B for Slave 12 PRBS12 Read/Write 0x00000000
0x00E8 Priority Register A for Slave 13 PRAS13 Read/Write 0x00000000
0x00EC Priority Register B for Slave 13 PRBS13 Read/Write 0x00000000
0x00F0 Priority Register A for Slave 14 PRAS14 Read/Write 0x00000000
0x00F4 Priority Register B for Slave 14 PRBS14 Read/Write 0x00000000
0x00F8 Priority Register A for Slave 15 PRAS15 Read/Write 0x00000000
0x00FC Priority Register B for Slave 15 PRBS15 Read/Write 0x00000000
0x0110 Special Function Register 0 SFR0 Read/Write –
0x0114 Special Function Register 1 SFR1 Read/Write –
0x0118 Special Function Register 2 SFR2 Read/Write –
0x011C Special Function Register 3 SFR3 Read/Write –
0x0120 Special Function Register 4 SFR4 Read/Write –
0x0124 Special Function Register 5 SFR5 Read/Write –
0x0128 Special Function Register 6 SFR6 Read/Write –
Table 11-1. HMATRIX Register Memory Map (Continued)
Offset Register Name Access Reset Value
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0x012C Special Function Register 7 SFR7 Read/Write –
0x0130 Special Function Register 8 SFR8 Read/Write –
0x0134 Special Function Register 9 SFR9 Read/Write –
0x0138 Special Function Register 10 SFR10 Read/Write –
0x013C Special Function Register 11 SFR11 Read/Write –
0x0140 Special Function Register 12 SFR12 Read/Write –
0x0144 Special Function Register 13 SFR13 Read/Write –
0x0148 Special Function Register 14 SFR14 Read/Write –
0x014C Special Function Register 15 SFR15 Read/Write –
Table 11-1. HMATRIX Register Memory Map (Continued)
Offset Register Name Access Reset Value
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11.5.1 Master Configuration Registers
Name: MCFG0...MCFG15
Access Type: Read/Write
Offset: 0x00 - 0x3C
Reset Value: 0x00000002
• ULBT: Undefined Length Burst Type
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
––––––––
76543210
– – – – – ULBT
Table 11-2. Undefined Length Burst Type
ULBT Undefined Length Burst Type Description
000 Inifinite Length Burst No predicted end of burst is generated and therefore INCR bursts coming from this
master cannot be broken.
001 Single-Access The undefined length burst is treated as a succession of single accesses, allowing rearbitration
at each beat of the INCR burst.
010 4 Beat Burst The undefined length burst is split into a four-beat burst, allowing re-arbitration at each
four-beat burst end.
011 8 Beat Burst The undefined length burst is split into an eight-beat burst, allowing re-arbitration at
each eight-beat burst end.
100 16 Beat Burst The undefined length burst is split into a sixteen-beat burst, allowing re-arbitration at
each sixteen-beat burst end.
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11.5.2 Slave Configuration Registers
Name: SCFG0...SCFG15
Access Type: Read/Write
Offset: 0x40 - 0x7C
Reset Value: 0x00000010
• ARBT: Arbitration Type
0: Round-Robin Arbitration
1: Fixed Priority Arbitration
• FIXED_DEFMSTR: Fixed Default Master
This is the number of the Default Master for this slave. Only used if DEFMSTR_TYPE is 2. Specifying the number of a master
which is not connected to the selected slave is equivalent to setting DEFMSTR_TYPE to 0.
• DEFMSTR_TYPE: Default Master Type
0: No Default Master
At the end of the current slave access, if no other master request is pending, the slave is disconnected from all masters.
This results in a one cycle latency for the first access of a burst transfer or for a single access.
1: Last Default Master
At the end of the current slave access, if no other master request is pending, the slave stays connected to the last master having
accessed it.
This results in not having one cycle latency when the last master tries to access the slave again.
2: Fixed Default Master
At the end of the current slave access, if no other master request is pending, the slave connects to the fixed master the number
that has been written in the FIXED_DEFMSTR field.
This results in not having one cycle latency when the fixed master tries to access the slave again.
• SLOT_CYCLE: Maximum Number of Allowed Cycles for a Burst
When the SLOT_CYCLE limit is reached for a burst, it may be broken by another master trying to access this slave.
This limit has been placed to avoid locking a very slow slave when very long bursts are used.
This limit must not be very small. Unreasonably small values break every burst and the Bus Matrix arbitrates without performing
any data transfer. 16 cycles is a reasonable value for SLOT_CYCLE.
31 30 29 28 27 26 25 24
– – – – – – – ARBT
23 22 21 20 19 18 17 16
– – FIXED_DEFMSTR DEFMSTR_TYPE
15 14 13 12 11 10 9 8
––––––––
76543210
SLOT_CYCLE
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11.5.3 Bus Matrix Priority Registers A For Slaves
Register Name: PRAS0...PRAS15
Access Type: Read/Write
Offset: -
Reset Value: 0x00000000
• MxPR: Master x Priority
Fixed priority of Master x for accessing the selected slave. The higher the number, the higher the priority.
31 30 29 28 27 26 25 24
- - M7PR - - M6PR
23 22 21 20 19 18 17 16
- - M5PR - - M4PR
15 14 13 12 11 10 9 8
- - M3PR - - M2PR
76543210
- - M1PR - - M0PR
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11.5.4 Priority Registers B For Slaves
Name: PRBS0...PRBS15
Access Type: Read/Write
Offset: -
Reset Value: 0x00000000
• MxPR: Master x Priority
Fixed priority of Master x for accessing the selected slave. The higher the number, the higher the priority.
31 30 29 28 27 26 25 24
- - M15PR - - M14PR
23 22 21 20 19 18 17 16
- - M13PR - - M12PR
15 14 13 12 11 10 9 8
- - M11PR - - M10PR
76543210
- - M9PR - - M8PR
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11.5.5 Special Function Registers
Name: SFR0...SFR15
Access Type: Read/Write
Offset: 0x110 - 0x14C
Reset Value: -
• SFR: Special Function Register Fields
Those registers are not a HMATRIX specific register. The field of those will be defined where they are used.
31 30 29 28 27 26 25 24
SFR
23 22 21 20 19 18 17 16
SFR
15 14 13 12 11 10 9 8
SFR
76543210
SFR
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11.6 Module Configuration
The specific configuration for each HMATRIX instance is listed in the following tables.The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power
Manager chapter for details.
11.6.1 Bus Matrix Connections
The bus matrix has the several masters and slaves. Each master has its own bus and its own
decoder, thus allowing a different memory mapping per master. The master number in the table
below can be used to index the HMATRIX control registers. For example, HMATRIX MCFG0
register is associated with the CPU Data master interface.
Each slave has its own arbiter, thus allowing a different arbitration per slave. The slave number
in the table below can be used to index the HMATRIX control registers. For example, SCFG3 is
associated with the Internal SRAM Slave Interface.
Accesses to unused areas returns an error result to the master requesting such an access.
Table 11-3. HMATRIX Clocks
Clock Name Description
CLK_HMATRIX Clock for the HMATRIX bus interface
Table 11-4. High Speed Bus Masters
Master 0 CPU Data
Master 1 CPU Instruction
Master 2 CPU SAB
Master 3 SAU
Master 4 PDCA
Master 5 USBC
Table 11-5. High Speed Bus Slaves
Slave 0 Internal Flash
Slave 1 HSB-PB Bridge A
Slave 2 HSB-PB Bridge B
Slave 3 Internal SRAM
Slave 4 SAU
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Figure 11-1. HMatrix Master / Slave Connections
CPU Data 0
CPU
Instruction 1
CPU SAB 2
SAU 3
Internal Flash
0
HSB-PB
Bridge 0
1
HSB-PB
Bridge 1
2
Internal SRAM
3
HMATRIX SLAVES
HMATRIX MASTERS
SAU
4
PDCA 4
USBC 5
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12. Interrupt Controller (INTC)
Rev: 1.0.2.5
12.1 Features
• Autovectored low latency interrupt service with programmable priority
– 4 priority levels for regular, maskable interrupts
– One Non-Maskable Interrupt
• Up to 64 groups of interrupts with up to 32 interrupt requests in each group
12.2 Overview
The INTC collects interrupt requests from the peripherals, prioritizes them, and delivers an interrupt
request and an autovector to the CPU. The AVR32 architecture supports 4 priority levels for
regular, maskable interrupts, and a Non-Maskable Interrupt (NMI).
The INTC supports up to 64 groups of interrupts. Each group can have up to 32 interrupt request
lines, these lines are connected to the peripherals. Each group has an Interrupt Priority Register
(IPR) and an Interrupt Request Register (IRR). The IPRs are used to assign a priority level and
an autovector to each group, and the IRRs are used to identify the active interrupt request within
each group. If a group has only one interrupt request line, an active interrupt group uniquely
identifies the active interrupt request line, and the corresponding IRR is not needed. The INTC
also provides one Interrupt Cause Register (ICR) per priority level. These registers identify the
group that has a pending interrupt of the corresponding priority level. If several groups have a
pending interrupt of the same level, the group with the lowest number takes priority.
12.3 Block Diagram
Figure 12-1 gives an overview of the INTC. The grey boxes represent registers that can be
accessed via the user interface. The interrupt requests from the peripherals (IREQn) and the
NMI are input on the left side of the figure. Signals to and from the CPU are on the right side of
the figure.
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Figure 12-1. INTC Block Diagram
12.4 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
12.4.1 Power Management
If the CPU enters a sleep mode that disables CLK_SYNC, the INTC will stop functioning and
resume operation after the system wakes up from sleep mode.
12.4.2 Clocks
The clock for the INTC bus interface (CLK_INTC) is generated by the Power Manager. This
clock is enabled at reset, and can be disabled in the Power Manager.
The INTC sampling logic runs on a clock which is stopped in any of the sleep modes where the
system RC oscillator is not running. This clock is referred to as CLK_SYNC. This clock is
enabled at reset, and only turned off in sleep modes where the system RC oscillator is stopped.
12.4.3 Debug Operation
When an external debugger forces the CPU into debug mode, the INTC continues normal
operation.
12.5 Functional Description
All of the incoming interrupt requests (IREQs) are sampled into the corresponding Interrupt
Request Register (IRR). The IRRs must be accessed to identify which IREQ within a group that
is active. If several IREQs within the same group are active, the interrupt service routine must
prioritize between them. All of the input lines in each group are logically ORed together to form
the GrpReqN lines, indicating if there is a pending interrupt in the corresponding group.
The Request Masking hardware maps each of the GrpReq lines to a priority level from INT0 to
INT3 by associating each group with the Interrupt Level (INTLEVEL) field in the corresponding
Request
Masking
OR
IREQ0
IREQ1
IREQ2
IREQ31
GrpReq0
Masks SREG
Masks
I[3-0]M
GM
INTLEVEL
AUTOVECTOR
Prioritizer
Interrupt Controller CPU
OR GrpReqN
NMIREQ
OR
IREQ32
IREQ33
IREQ34
IREQ63
GrpReq1
IRR Registers IPR Registers ICR Registers
INT_level,
offset
INT_level,
offset
INT_level,
offset
IPR0
IPR1
IPRn
IRR0
IRR1
IRRn
ValReq0
ValReq1
ValReqN
.
.
.
.
.
.
.
.
.
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Interrupt Priority Register (IPR). The GrpReq inputs are then masked by the mask bits from the
CPU status register. Any interrupt group that has a pending interrupt of a priority level that is not
masked by the CPU status register, gets its corresponding ValReq line asserted.
Masking of the interrupt requests is done based on five interrupt mask bits of the CPU status
register, namely Interrupt Level 3 Mask (I3M) to Interrupt Level 0 Mask (I0M), and Global Interrupt
Mask (GM). An interrupt request is masked if either the GM or the corresponding interrupt
level mask bit is set.
The Prioritizer hardware uses the ValReq lines and the INTLEVEL field in the IPRs to select the
pending interrupt of the highest priority. If an NMI interrupt request is pending, it automatically
gets the highest priority of any pending interrupt. If several interrupt groups of the highest pending
interrupt level have pending interrupts, the interrupt group with the lowest number is
selected.
The INTLEVEL and handler autovector offset (AUTOVECTOR) of the selected interrupt are
transmitted to the CPU for interrupt handling and context switching. The CPU does not need to
know which interrupt is requesting handling, but only the level and the offset of the handler
address. The IRR registers contain the interrupt request lines of the groups and can be read via
user interface registers for checking which interrupts of the group are actually active.
The delay through the INTC from the peripheral interrupt request is set until the interrupt request
to the CPU is set is three cycles of CLK_SYNC.
12.5.1 Non-Maskable Interrupts
A NMI request has priority over all other interrupt requests. NMI has a dedicated exception vector
address defined by the AVR32 architecture, so AUTOVECTOR is undefined when
INTLEVEL indicates that an NMI is pending.
12.5.2 CPU Response
When the CPU receives an interrupt request it checks if any other exceptions are pending. If no
exceptions of higher priority are pending, interrupt handling is initiated. When initiating interrupt
handling, the corresponding interrupt mask bit is set automatically for this and lower levels in status
register. E.g, if an interrupt of level 3 is approved for handling, the interrupt mask bits I3M,
I2M, I1M, and I0M are set in status register. If an interrupt of level 1 is approved, the masking
bits I1M and I0M are set in status register. The handler address is calculated by logical OR of
the AUTOVECTOR to the CPU system register Exception Vector Base Address (EVBA). The
CPU will then jump to the calculated address and start executing the interrupt handler.
Setting the interrupt mask bits prevents the interrupts from the same and lower levels to be
passed through the interrupt controller. Setting of the same level mask bit prevents also multiple
requests of the same interrupt to happen.
It is the responsibility of the handler software to clear the interrupt request that caused the interrupt
before returning from the interrupt handler. If the conditions that caused the interrupt are not
cleared, the interrupt request remains active.
12.5.3 Clearing an Interrupt Request
Clearing of the interrupt request is done by writing to registers in the corresponding peripheral
module, which then clears the corresponding NMIREQ/IREQ signal.
The recommended way of clearing an interrupt request is a store operation to the controlling
peripheral register, followed by a dummy load operation from the same register. This causes a
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pipeline stall, which prevents the interrupt from accidentally re-triggering in case the handler is
exited and the interrupt mask is cleared before the interrupt request is cleared.
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12.6 User Interface
Table 12-1. INTC Register Memory Map
Offset Register Register Name Access Reset
0x000 Interrupt Priority Register 0 IPR0 Read/Write 0x00000000
0x004 Interrupt Priority Register 1 IPR1 Read/Write 0x00000000
... ... ... ... ...
0x0FC Interrupt Priority Register 63 IPR63 Read/Write 0x00000000
0x100 Interrupt Request Register 0 IRR0 Read-only N/A
0x104 Interrupt Request Register 1 IRR1 Read-only N/A
... ... ... ... ...
0x1FC Interrupt Request Register 63 IRR63 Read-only N/A
0x200 Interrupt Cause Register 3 ICR3 Read-only N/A
0x204 Interrupt Cause Register 2 ICR2 Read-only N/A
0x208 Interrupt Cause Register 1 ICR1 Read-only N/A
0x20C Interrupt Cause Register 0 ICR0 Read-only N/A
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12.6.1 Interrupt Priority Registers
Name: IPR0...IPR63
Access Type: Read/Write
Offset: 0x000 - 0x0FC
Reset Value: 0x00000000
• INTLEVEL: Interrupt Level
Indicates the EVBA-relative offset of the interrupt handler of the corresponding group:
00: INT0: Lowest priority
01: INT1
10: INT2
11: INT3: Highest priority
• AUTOVECTOR: Autovector Address
Handler offset is used to give the address of the interrupt handler. The least significant bit should be written to zero to give
halfword alignment.
31 30 29 28 27 26 25 24
INTLEVEL - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - AUTOVECTOR[13:8]
76543210
AUTOVECTOR[7:0]
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12.6.2 Interrupt Request Registers
Name: IRR0...IRR63
Access Type: Read-only
Offset: 0x0FF - 0x1FC
Reset Value: N/A
• IRR: Interrupt Request line
This bit is cleared when no interrupt request is pending on this input request line.
This bit is set when an interrupt request is pending on this input request line.
The are 64 IRRs, one for each group. Each IRR has 32 bits, one for each possible interrupt request, for a total of 2048 possible
input lines. The IRRs are read by the software interrupt handler in order to determine which interrupt request is pending. The
IRRs are sampled continuously, and are read-only.
31 30 29 28 27 26 25 24
IRR[32*x+31] IRR[32*x+30] IRR[32*x+29] IRR[32*x+28] IRR[32*x+27] IRR[32*x+26] IRR[32*x+25] IRR[32*x+24]
23 22 21 20 19 18 17 16
IRR[32*x+23] IRR[32*x+22] IRR[32*x+21] IRR[32*x+20] IRR[32*x+19] IRR[32*x+18] IRR[32*x+17] IRR[32*x+16]
15 14 13 12 11 10 9 8
IRR[32*x+15] IRR[32*x+14] IRR[32*x+13] IRR[32*x+12] IRR[32*x+11] IRR[32*x+10] IRR[32*x+9] IRR[32*x+8]
76543210
IRR[32*x+7] IRR[32*x+6] IRR[32*x+5] IRR[32*x+4] IRR[32*x+3] IRR[32*x+2] IRR[32*x+1] IRR[32*x+0]
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12.6.3 Interrupt Cause Registers
Name: ICR0...ICR3
Access Type: Read-only
Offset: 0x200 - 0x20C
Reset Value: N/A
• CAUSE: Interrupt Group Causing Interrupt of Priority n
ICRn identifies the group with the highest priority that has a pending interrupt of level n. This value is only defined when at least
one interrupt of level n is pending.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - CAUSE
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12.7 Module Configuration
The specific configuration for each INTC instance is listed in the following tables.The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
12.7.1 Interrupt Request Signal Map
12.8 Interrupt Request Signal Map
The various modules may output Interrupt request signals. These signals are routed to the Interrupt
Controller (INTC), described in a later chapter. The Interrupt Controller supports up to 64
groups of interrupt requests. Each group can have up to 32 interrupt request signals. All interrupt
signals in the same group share the same autovector address and priority level. Refer to the
documentation for the individual submodules for a description of the semantics of the different
interrupt requests.
The interrupt request signals are connected to the INTC as follows.
Table 12-2. INTC Clock Name
Module Name Clock Name Description
INTC CLK_INTC Clock for the INTC bus interface
Table 12-3. Interrupt Request Signal Map
Group Line Module Signal
0 0 AVR32UC3 CPU SYSREG COMPARE
1
0 AVR32UC3 CPU OCD DCEMU_DIRTY
1 AVR32UC3 CPU OCD DCCPU_READ
2 0 Flash Controller FLASHCDW
3 0 Secure Access Unit SAU
4
0 Peripheral DMA Controller PDCA 0
1 Peripheral DMA Controller PDCA 1
2 Peripheral DMA Controller PDCA 2
3 Peripheral DMA Controller PDCA 3
5
0 Peripheral DMA Controller PDCA 4
1 Peripheral DMA Controller PDCA 5
2 Peripheral DMA Controller PDCA 6
3 Peripheral DMA Controller PDCA 7
6
0 Peripheral DMA Controller PDCA 8
1 Peripheral DMA Controller PDCA 9
2 Peripheral DMA Controller PDCA 10
3 Peripheral DMA Controller PDCA 11
7 0 Power Manager PM
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8 0 System Control Interface SCIF
9 0 Asynchronous Timer AST ALARM
10
0 Asynchronous Timer AST PER
1 Asynchronous Timer AST OVF
2 Asynchronous Timer AST READY
3 Asynchronous Timer AST CLKREADY
11
0 External Interrupt Controller EIC 1
1 External Interrupt Controller EIC 2
2 External Interrupt Controller EIC 3
3 External Interrupt Controller EIC 4
12 0 External Interrupt Controller EIC 5
13 0 Frequency Meter FREQM
14
0 General-Purpose Input/Output Controller GPIO 0
1 General-Purpose Input/Output Controller GPIO 1
2 General-Purpose Input/Output Controller GPIO 2
3 General-Purpose Input/Output Controller GPIO 3
4 General-Purpose Input/Output Controller GPIO 4
5 General-Purpose Input/Output Controller GPIO 5
6 General-Purpose Input/Output Controller GPIO 6
7 General-Purpose Input/Output Controller GPIO 7
15 0 Universal Synchronous Asynchronous
Receiver Transmitter USART0
16 0 Universal Synchronous Asynchronous
Receiver Transmitter USART1
17 0 Universal Synchronous Asynchronous
Receiver Transmitter USART2
18 0 Universal Synchronous Asynchronous
Receiver Transmitter USART3
19 0 Serial Peripheral Interface SPI
20 0 Two-wire Master Interface TWIM0
21 0 Two-wire Master Interface TWIM1
22 0 Two-wire Slave Interface TWIS0
23 0 Two-wire Slave Interface TWIS1
24 0 Pulse Width Modulation Controller PWMA
25
0 Timer/Counter TC00
1 Timer/Counter TC01
2 Timer/Counter TC02
Table 12-3. Interrupt Request Signal Map
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26
0 Timer/Counter TC10
1 Timer/Counter TC11
2 Timer/Counter TC12
27 0 ADC Interface ADCIFB
28 0 Analog Comparator Interface ACIFB
29 0 Capacitive Touch Module CAT
30 0 aWire AW
31 0 Audio Bitstream DAC ABDACB
32 0 USB 2.0 Interface USBC
33 0 Inter-IC Sound (I2S) Controller IISC
Table 12-3. Interrupt Request Signal Map
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13. Power Manager (PM)
Rev: 4.2.0.4
13.1 Features
• Generates clocks and resets for digital logic
• On-the-fly frequency change of CPU, HSB and PBx clocks
• Sleep modes allow simple disabling of logic clocks and clock sources
• Module-level clock gating through maskable peripheral clocks
• Wake-up from internal or external interrupts
• Automatic identification of reset sources
• Supports advanced Shutdown sleep mode
13.2 Overview
The Power Manager (PM) provides synchronous clocks used to clock the main digital logic in the
device, namely the CPU, and the modules and peripherals connected to the High Speed Bus
(HSB) and the Peripheral Buses (PBx).
The PM contains advanced power-saving features, allowing the user to optimize the power consumption
for an application. The synchronous clocks are divided into a number of clock
domains, one for the CPU and HSB, and one for each PBx. The clocks can run at different
speeds, allowing the user to save power by running peripherals relatively slow, whilst maintaining
high CPU performance. The clocks can be independently changed on-the-fly, without halting
any peripherals. The user may adjust CPU and memory speeds according to the dynamic application
load, without disturbing or re-configuring active peripherals.
Each module has a separate clock, enabling the user to save power by switching off clocks to
inactive modules. Clocks and oscillators can be automatically switched off during idle periods by
the CPU sleep instruction. The system will return to normal operation when interrupts occur.
To achieve minimal power usage, a special sleep mode, called Shutdown is available, where
power on all internal logic (CPU, peripherals) and most of the I/O lines is removed, reducing current
leakage. Only a small amount of logic, including the 32KHz crystal oscillator (OSC32K) and
the AST remain powered.
The Power Manager also contains a Reset Controller, which collects all possible reset sources,
generates hard and soft resets, and allows the reset source to be identified by software.
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13.3 Block Diagram
Figure 13-1. PM Block Diagram
13.4 I/O Lines Description
13.5 Product Dependencies
13.5.1 Interrupt
The PM interrupt line is connected to one of the interrupt controllers internal sources. Using the
PM interrupt requires the interrupt controller to be configured first.
13.5.2 Clock Implementation
In ATUC64/128/256L3/4U, the HSB shares source clock with the CPU. Write attempts to the
HSB Clock Select register (HSBSEL) will be ignored, and it will always read the same as the
CPU Clock Select register (CPUSEL).
The PM bus interface clock (CLK_PM) is generated by the Power Manager. This clock is
enabled at reset, and can be disabled in the Power Manager. If disabled it can only be reenabled
by a reset.
13.5.3 Power Considerations
The Shutdown mode is only available for the “3.3V supply mode, with 1.8V regulated I/O lines“
power configuration.
Table 13-1. I/O Lines Description
Name Description Type Active Level
RESET_N Reset Input Low
Sleep Controller
Synchronous
Clock Generator
Reset Controller
Main Clock Sources
Sleep
Instruction
Power-on Reset
Detector(s)
Resets
Synchronous
clocks
CPU, HSB,
PBx
Interrupts
External Reset Pin
Reset Sources
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13.6 Functional Description
13.6.1 Synchronous Clocks
The System RC Oscillator (RCSYS) and a selection of other clock sources can provide the
source for the main clock, which is the origin for the synchronous CPU/HSB and PBx module
clocks. For details about the other main clock sources, please refer to the Main Clock Control
(MCCTRL) register description. The synchronous clocks can run of the main clock and all the 8-
bit prescaler settings as long as fCPU fPBx,. The synchronous clock source can be changed onthe
fly, according to variations in application load. The clock domains can be shut down in sleep
mode, as described in Section 13.6.3. The module clocks in every synchronous clock domain
can be individually masked to minimize power consumption in inactive modules.
Figure 13-2. Synchronous Clock Generation
13.6.1.1 Selecting the main clock source
The common main clock can be connected to RCSYS or a selection of other clock sources. For
details about the other main clock sources, please refer to the MCCTRL register description. By
default, the main clock will be connected to RCSYS. The user can connect the main clock to
another source by writing to the Main Clock Select (MCCTRL.MCSEL) field. The user must first
assure that the source is enabled and ready in order to avoid a deadlock. Care should also be
taken so that the new synchronous clock frequencies do not exceed the maximum frequency for
each clock domain.
13.6.1.2 Selecting synchronous clock division ratio
The main clock feeds an 8-bit prescaler, which can be used to generate the synchronous clocks.
By default, the synchronous clocks run on the undivided main clock. The user can select a prescaler
division for the CPU clock by writing a one to the CPU Division bit in the CPU Clock Select
register (CPUSEL.CPUDIV), and a value to the CPU Clock Select field (CPUSEL.CPUSEL),
resulting in a CPU clock frequency:
fCPU = fmain / 2(CPUSEL+1)
Mask
Prescaler Main Clock
Sources
MCSEL
0
1
CPUSEL
CPUDIV
Main Clock
Sleep
Controller
CPUMASK
CPU Clocks
HSB Clocks
PBx Clocks
Sleep
Instruction
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Similarly, the PBx clocks can be divided by writing their respective Clock Select (PBxSEL) registers
to get the divided PBx frequency:
fPBx = fmain / 2(PBSEL+1)
The PBx clock frequency can not exceed the CPU clock frequency. The user must select a PBxSEL.PBSEL
value greater than or equal to the CPUSEL.CPUSEL value, so that fCPU fPBx. If the
user selects division factors that will result in fCPU< fPBx, the Power Manager will automatically
change the PBxSEL.PBSEL/PBDIV values to ensure correct operation (fCPU fPBx).
The HSB clock will always be forced to the same division as the CPU clock.
To ensure correct operation, the frequencies must never exceed the specified maximum frequency
for each clock domain.
For modules connected to the HSB bus, the PB clock frequency must be the same as the CPU
clock frequency.
13.6.1.3 Clock Ready flag
There is a slight delay from CPUSEL and PBxSEL being written to the new clock setting taking
effect. During this interval, the Clock Ready bit in the Status Register (SR.CKRDY) will read as
zero. When the clock settings change is completed, the bit will read as one. The Clock Select
registers (CPUSEL, PBxSEL) must not be written to while SR.CKRDY is zero, or the system
may become unstable or hang.
The Clock Ready bit in the Interrupt Status Register (ISR.CKRDY) is set on a SR.CKRDY zeroto-one
transition. If the Clock Ready bit in the Interrupt Mask Register (IMR.CKRDY) is set, an
interrupt request is generated. IMR.CKRDY is set by writing a one to the corresponding bit in the
Interrupt Enable Register (IER.CKRDY).
13.6.2 Peripheral Clock Masking
By default, the clocks for all modules are enabled, regardless of which modules are actually
being used. It is possible to disable the clock for a module in the CPU, HSB, or PBx clock
domain by writing a zero to the corresponding bit in the corresponding Clock Mask (CPUMASK/HSBMASK/PBxMASK)
register. When a module is not clocked, it will cease operation,
and its registers cannot be read nor written. The module can be re-enabled later by writing a one
to the corresponding mask bit. A module may be connected to several clock domains, in which
case it will have several mask bits. The Maskable Module Clocks table in the Clock Mask register
description contains a list of implemented maskable clocks.
13.6.2.1 Cautionary note
Note that clocks should only be switched off if it is certain that the module will not be used.
Switching off the clock for the Flash Controller will cause a problem if the CPU needs to read
from the flash. Switching off the clock to the Power Manager, which contains the mask registers,
or the corresponding PBx bridge, will make it impossible to write to the mask registers again. In
this case, they can only be re-enabled by a system reset.
13.6.3 Sleep Modes
In normal operation, all clock domains are active, allowing software execution and peripheral
operation. When the CPU is idle, it is possible to switch it and other (optional) clock domains off
to save power. This is done by the sleep instruction, which takes the sleep mode index number
from Table 13-2 on page 213 as argument.
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13.6.3.1 Entering and exiting sleep modes
The sleep instruction will halt the CPU and all modules belonging to the stopped clock domains.
The modules will be halted regardless of the bit settings in the mask registers.
Clock sources can also be switched off to save power. Some of these have a relatively long
start-up time, and are only switched off when very low power consumption is required.
The CPU and affected modules are restarted when the sleep mode is exited. This occurs when
an interrupt triggers. Note that even if an interrupt is enabled in sleep mode, it may not trigger if
the source module is not clocked.
13.6.3.2 Supported sleep modes
The following sleep modes are supported. These are detailed in Table 13-2 on page 213.
• Idle: The CPU is stopped, the rest of the device is operational.
• Frozen: The CPU and HSB modules are stopped, peripherals are operational.
• Standby: All synchronous clocks are stopped, and the clock sources are running, allowing for
a quick wake-up to normal mode.
• Stop: As Standby, but oscillators, and other clock sources are also stopped. 32KHz Oscillator
OSC32K(2), RCSYS, AST, and WDT will remain operational.
• DeepStop: All synchronous clocks and clock sources are stopped. Bandgap voltage
reference and BOD are turned off. OSC32K(2) and RCSYS remain operational.
• Static: All clock sources, including RCSYS are stopped. Bandgap voltage reference and BOD
are turned off. OSC32K(2) remains operational.
• Shutdown: All clock sources, including RCSYS are stopped. Bandgap voltage reference,
BOD detector, and Voltage regulator are turned off. OSC32K(2) remains operational. This
mode can only be used in the “3.3V supply mode, with 1.8V regulated I/O lines“
configuration (described in Power Considerations chapter). Refer to Section 13.6.4 for more
details.
Notes: 1. The sleep mode index is used as argument for the sleep instruction.
2. OSC32K will only remain operational if pre-enabled.
3. Clock sources other than those specifically listed in the table.
4. SYSTIMER is the clock for the CPU COUNT and COMPARE registers.
The internal voltage regulator is also adjusted according to the sleep mode in order to reduce its
power consumption.
Table 13-2. Sleep Modes
Index(1) Sleep Mode CPU HSB
PBx,
GCLK
Clock Sources(3),
SYSTIMER(4) OSC32K(2) RCSYS
BOD &
Bandgap
Voltage
Regulator
0 Idle Stop Run Run Run Run Run On Normal mode
1 Frozen Stop Stop Run Run Run Run On Normal mode
2 Standby Stop Stop Stop Run Run Run On Normal mode
3 Stop Stop Stop Stop Stop Run Run On Low power mode
4 DeepStop Stop Stop Stop Stop Run Run Off Low power mode
5 Static Stop Stop Stop Stop Run Stop Off Low power mode
6 Shutdown Stop Stop Stop Stop Run Stop Off Off
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13.6.3.3 Waking from sleep modes
There are two types of wake-up sources from sleep mode, synchronous and asynchronous.
Synchronous wake-up sources are all non-masked interrupts. Asynchronous wake-up sources
are AST, WDT, external interrupts from EIC, external reset, external wake pin (WAKE_N), and
all asynchronous wake-ups enabled in the Asynchronous Wake Up Enable (AWEN) register. The
valid wake-up sources for each sleep mode are detailed in Table 13-3 on page 214.
In Shutdown the only wake-up sources are external reset, external wake-up pin or AST. See
Section 13.6.4.3 on page 216.
Notes: 1. The sleep mode index is used as argument for the sleep instruction.
2. Only PB modules operational, as HSB module clocks are stopped.
3. WDT only available if clocked from pre-enabled OSC32K.
13.6.3.4 SleepWalking
In all sleep modes where the PBx clocks are stopped, except for Shutdown mode, the device
can partially wake up if a PBx module asynchronously discovers that it needs its clock. Only the
requested clocks and clock sources needed will be started, all other clocks will remain masked
to zero. E.g. if the main clock source is OSC0, only OSC0 will be started even if other clock
sources were enabled in normal mode. Generic clocks can also be started in a similar way. The
state where only requested clocks are running is referred to as SleepWalking.
The time spent to start the requested clock is mostly limited by the startup time of the given clock
source. This allows PBx modules to handle incoming requests, while still keeping the power consumption
at a minimum.
When the device is SleepWalking any asynchronous wake-up can wake the device up at any
time without stopping the requested PBx clock.
All requests to start clocks can be masked by writing to the Peripheral Power Control Register
(PPCR), all requests are enabled at reset.
During SleepWalking the interrupt controller clock will be running. If an interrupt is pending when
entering SleepWalking, it will wake the whole device up.
13.6.3.5 Precautions when entering sleep mode
Modules communicating with external circuits should normally be disabled before entering a
sleep mode that will stop the module operation. This will prevent erratic behavior caused by
entering or exiting sleep modes. Please refer to the relevant module documentation for recommended
actions.
Table 13-3. Wake-up Sources
Index(1) Sleep Mode Wake-up Sources
0 Idle Synchronous, Asynchronous
1 Frozen Synchronous(2), Asynchronous
2 Standby Asynchronous
3 Stop Asynchronous
4 DeepStop Asynchronous
5 Static Asynchronous(3)
6 Shutdown External reset, External wake-up pin
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Communication between the synchronous clock domains is disturbed when entering and exiting
sleep modes. Bus transactions over clock domains affected by the sleep mode are therefore not
recommended. The system may hang if the bus clocks are stopped during a bus transaction.
The CPU is automatically stopped in a safe state to ensure that all CPU bus operations are complete
when the sleep mode goes into effect. Thus, when entering Idle mode, no further action is
necessary.
When entering a sleep mode (except Idle mode), all HSB masters must be stopped before
entering the sleep mode. In order to let potential PBx write operations complete, the user should
let the CPU perform a PBx register read operation before issuing the sleep instruction. This will
stall the CPU until pending PBx operations have completed.
The Shutdown sleep mode requires extra care. Please refer to Section 13.6.4.
13.6.4 Shutdown Sleep Mode
13.6.4.1 Description
The Shutdown sleep mode is available only when the device is used in the “3.3V supply mode,
with 1.8V regulated I/O lines“ configuration (refer to the Power Considerations chapter). In this
configuration, the voltage regulator supplies both VDDCORE and VDDIO power supplies.
When the device enters Shutdown mode, the regulator is turned off and only the following logic
is kept powered by VDDIN:
– OSC32K using alternate pinout PA13/PA20
– AST core logic (internal counter and alarm detection logic)
– Backup Registers
– I/O lines PA11, PA13, PA20, PA21, PB04, PB05, and PB10
– RESET_N line
The table below lists I/O line functionality that remains operational during Shutdown sleep mode.
If no special function is used the I/O line will keep its setting when entering the sleep mode
13.6.4.2 Entering Shutdown sleep mode
Before entering the Shutdown sleep mode, a few actions are required:
– All modules should normally be disabled before entering Shutdown sleep mode (see
Section 13.6.3.5)
Table 13-4. I/O Lines Usage During Shutdown Mode
Pin Possible Usage During Shutdown Sleep Mode
PA11 WAKE_N signal (active low wake-up)
PA13 XIN32_2 (OSC32K using alternate pinout)
PA20 XOUT32_2 (OSC32K using alternate pinout)
PA21
PB04
PB05
PB10
RESET_N Reset pin
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– The POR33 must be masked to avoid spurious resets when the power is back. This
must also be done when POR33 is disabled, as POR33 will be enabled
automatically when the device wakes up from Shutdown mode. Disable the POR33
by writing a one to the POR33MASK bit in the SCIF.VREGCR register. Due to
internal synchronisation, this bit must be read as a one before the sleep instruction is
executed by the CPU. Refer to the System Control Interface (SCIF) chapter for more
details.
– The 32KHz RC oscillator (RC32K) must be running and stable. This is done by
writing a one to the EN bit in the SCIF.RC32KCR register. Due to internal
synchronisation, this bit must be read as a one to ensure that the oscillator is stable
before the sleep instruction is executed by the CPU.
As soon as the Shutdown sleep mode is entered, all CPU and peripherals are reset to ensure a
consistent state. POR33 and RC32K are automatically disabled to save extra power.
13.6.4.3 Leaving Shutdown sleep mode
Exiting Shutdown sleep mode can be done by the events described in Table 13-5.
When a wake-up event occurs, the regulator is turned on and the device will wait for VDDCORE
to be valid before starting. The Sleep Reset bit in the Reset Cause register (RCAUSE.SLEEP) is
then set, allowing software running on the device to distinguish between the first power-up and a
wake-up from Shutdown mode.
13.6.4.4 Special consideration regarding waking up from Shutdown sleep mode using the WAKE_N pin
By default, the WAKE_N pin will only wake the device up if it is pulled low after entering Shutdown
mode. If the WAKE_N is pulled low before the Shutdown mode is entered, it will not wake
the device from the Shutdown sleep mode. In order to wake the device by pulling WAKE_N low
before entering Shutdown mode, the user has to write a one to the bit corresponding to the
WAKEN wake-up source in the AWEN register. In this scenario, the CPU execution will proceed
with the next instruction, and the RCAUSE register content will not be altered.
13.6.5 Divided PB Clocks
The clock generator in the Power Manager provides divided PBx clocks for use by peripherals
that require a prescaled PBx clock. This is described in the documentation for the relevant modules.
The divided clocks are directly maskable, and are stopped in sleep modes where the PBx
clocks are stopped.
Table 13-5. Events That Can Wake up the Device from Shutdown Mode
Source How
PA11 (WAKE_N) Pulling-down PA11 will wake up the device
RESET_N
Pulling-down RESET_N pin will wake up the device
The device is kept under reset until RESET_N is tied high
again
AST
OSC32K must be set-up to use alternate pinout (XIN32_2
and XOUT32_2) Refer to the SCIF Chapter
AST must be configured to use the clock from OSC32K
AST must be configured to allow alarm, periodic, or
overflow wake-up
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13.6.6 Reset Controller
The Reset Controller collects the various reset sources in the system and generates hard and
soft resets for the digital logic.
The device contains a Power-on Reset (POR) detector, which keeps the system reset until
power is stable. This eliminates the need for external reset circuitry to guarantee stable operation
when powering up the device.
It is also possible to reset the device by pulling the RESET_N pin low. This pin has an internal
pull-up, and does not need to be driven externally during normal operation. Table 13-6 on page
217 lists these and other reset sources supported by the Reset Controller.
Figure 13-3. Reset Controller Block Diagram
In addition to the listed reset types, the JTAG & aWire can keep parts of the device statically
reset. See JTAG and aWire documentation for details.
Table 13-6. Reset Description
Reset Source Description
Power-on Reset Supply voltage below the Power-on Reset detector threshold
voltage VPOT
External Reset RESET_N pin asserted
Brown-out Reset VDDCORE supply voltage below the Brown-out detector
threshold voltage
JTAG
Reset
Controller
RESET_N
Power-on Reset
Detector(s)
OCD
Watchdog Reset
RCAUSE
CPU, HSB, PBx
OCD, AST, WDT,
Clock Generator
Brown-out
Detector
AWIRE
SM33 Detector
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Depending on the reset source, when a reset occurs, some parts of the device are not always
reset. Only the Power-on Reset (POR) will force a whole device reset. Refer to the table in the
Module Configuration section at the end of this chapter for further details. The latest reset cause
can be read in the RCAUSE register, and can be read during the applications boot sequence in
order to determine proper action.
13.6.6.1 Power-on Reset Detector
The Power-on Reset 1.8V (POR18) detector monitors the VDDCORE supply pin and generates
a Power-on Reset (POR) when the device is powered on. The POR is active until the
VDDCORE voltage is above the power-on threshold level (VPOT). The POR will be re-generated
if the voltage drops below the power-on threshold level. See Electrical Characteristics for parametric
details.
The Power-on Reset 3.3V (POR33) detector monitors the internal regulator supply pin and generates
a Power-on Reset (POR) when the device is powered on. The POR is active until the
internal regulator supply voltage is above the regulator power-on threshold level (VPOT). The
POR will be re-generated if the voltage drops below the regulator power-on threshold level. See
Electrical Characteristics for parametric details.
13.6.6.2 External Reset
The external reset detector monitors the RESET_N pin state. By default, a low level on this pin
will generate a reset.
13.6.7 Clock Failure Detector
This mechanism automatically switches the main clock source to the safe RCSYS clock when
the main clock source fails. This may happen when an external crystal is selected as a source
for the main clock and the crystal is not mounted on the board. The main clock is compared with
RCSYS, and if no rising edge of the main clock is detected during one RCSYS period, the clock
is considered to have failed.
The detector is enabled by writing a one to the Clock Failure Detection Enable bit in the Clock
Failure Detector Control Register (CFDCTRL.CFDEN). As soon as the detector is enabled, the
clock failure detector will monitor the divided main clock. Note that the detector does not monitor
the main clock if RCSYS is the source of the main clock, or if the main clock is temporarily not
available (startup-time after a wake-up, switching timing etc.), or in sleep mode where the main
clock is driven by the RCSYS (Stop and DeepStop mode). When a clock failure is detected, the
main clock automatically switches to the RCSYS clock and the Clock Failure Detected (CFD)
interrupt is generated if enabled. The MCCTRL register is also changed by hardware to indicate
that the main clock comes from RCSYS.
13.6.8 Interrupts
The PM has a number of interrupt sources:
• AE - Access Error,
SM33 Reset Internal regulator supply voltage below the SM33 threshold
voltage. This generates a Power-on Reset.
Watchdog Timer See Watchdog Timer documentation
OCD See On-Chip Debug documentation
Reset Source Description
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– A lock protected register is written to without first being unlocked.
• CKRDY - Clock Ready:
– New Clock Select settings in the CPUSEL/PBxSEL registers have taken effect. (A
zero-to-one transition on SR.CKRDY is detected).
• CFD - Clock Failure Detected:
– The system detects that the main clock is not running.
The Interrupt Status Register contains one bit for each interrupt source. A bit in this register is
set on a zero-to-one transition of the corresponding bit in the Status Register (SR), and cleared
by writing a one to the corresponding bit in the Interrupt Clear Register (ICR). The interrupt
sources will generate an interrupt request if the corresponding bit in the Interrupt Mask Register
is set. The interrupt sources are ORed together to form one interrupt request. The Power Manager
will generate an interrupt request if at least one of the bits in the Interrupt Mask Register
(IMR) is set. Bits in IMR are set by writing a one to the corresponding bit in the Interrupt Enable
Register (IER), and cleared by writing a one to the corresponding bit in the Interrupt Disable
Register (IDR). The interrupt request remains active until the corresponding bit in the Interrupt
Status Register (ISR) is cleared by writing a one to the corresponding bit in the Interrupt Clear
Register (ICR). Because all the interrupt sources are ORed together, the interrupt request from
the Power Manager will remain active until all the bits in ISR are cleared.
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13.7 User Interface
Note: 1. The reset value is device specific. Please refer to the Module Configuration section at the end of this chapter.
2. Latest Reset Source.
3. Latest Wake Source.
Table 13-7. PM Register Memory Map
Offset Register Register Name Access Reset
0x000 Main Clock Control MCCTRL Read/Write 0x00000000
0x004 CPU Clock Select CPUSEL Read/Write 0x00000000
0x008 HSB Clock Select HSBSEL Read-only 0x00000000
0x00C PBA Clock Select PBASEL Read/Write 0x00000000
0x010 PBB Clock Select PBBSEL Read/Write 0x00000000
0x014 - 0x01C Reserved
0x020 CPU Mask CPUMASK Read/Write 0x00010001
0x024 HSB Mask HSBMASK Read/Write 0x0000007F
0x028 PBA Mask PBAMASK Read/Write 0x0FFFFFFF
0x02C PBB Mask PBBMASK Read/Write 0x0000000F
0x030- 0x03C Reserved
0x040 PBA Divided Mask PBADIVMASK Read/Write 0x0000007F
0x044 - 0x050 Reserved
0x054 Clock Failure Detector Control CFDCTRL Read/Write 0x00000000
0x058 Unlock Register UNLOCK Write-only 0x00000000
0x05C - 0x0BC Reserved
0x0C0 Interrupt Enable Register IER Write-only 0x00000000
0x0C4 Interrupt Disable Register IDR Write-only 0x00000000
0x0C8 Interrupt Mask Register IMR Read-only 0x00000000
0x0CC Interrupt Status Register ISR Read-only 0x00000000
0x0D0 Interrupt Clear Register ICR Write-only 0x00000000
0x0D4 Status Register SR Read-only 0x00000020
0x0D8 - 0x15C Reserved
0x160 Peripheral Power Control Register PPCR Read/Write 0x000001FA
0x164 - 0x17C Reserved
0x180 Reset Cause Register RCAUSE Read-only -(2)
0x184 Wake Cause Register WCAUSE Read-only -(3)
0x188 Asynchronous Wake Up Enable Register AWEN Read/Write 0x00000000
0x18C - 0x3F4 Reserved
0x3F8 Configuration Register CONFIG Read-only 0x00000043
0x3FC Version Register VERSION Read-only -(1)
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13.7.1 Main Clock Control
Name: MCCTRL
Access Type: Read/Write
Offset: 0x000
Reset Value: 0x00000000
• MCSEL: Main Clock Select
Note: 1. If the 120MHz RC oscillator is selected as main clock source, it must be divided by at least 4 before being used as clock
source for the CPU. This division is selected by writing to the CPUSEL and CPUDIV bits in the CPUSEL register, before
switching to RC120M as main clock source.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - MCSEL
Table 13-8. Main clocks in ATUC64/128/256L3/4U.
MCSEL[2:0] Main clock source
0 System RC oscillator (RCSYS)
1 Oscillator0 (OSC0)
2 DFLL
3 120MHz RC oscillator
(RC120M)(1)
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13.7.2 CPU Clock Select
Name: CPUSEL
Access Type: Read/Write
Offset: 0x004
Reset Value: 0x00000000
• CPUDIV, CPUSEL: CPU Division and Clock Select
CPUDIV = 0: CPU clock equals main clock.
CPUDIV = 1: CPU clock equals main clock divided by 2(CPUSEL+1).
Note that if CPUDIV is written to 0, CPUSEL should also be written to 0 to ensure correct operation.
Also note that writing this register clears POSCSR.CKRDY. The register must not be re-written until CKRDY goes high.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
CPUDIV - - - - CPUSEL
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13.7.3 HSB Clock Select
Name: HSBSEL
Access Type: Read
Offset: 0x008
Reset Value: 0x00000000
This register is read-only and its content is always equal to CPUSEL.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
HSBDIV - - - - HSBSEL
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13.7.4 PBx Clock Select
Name: PBxSEL
Access Type: Read/Write
Offset: 0x00C-0x010
Reset Value: 0x00000000
• PBDIV, PBSEL: PBx Division and Clock Select
PBDIV = 0: PBx clock equals main clock.
PBDIV = 1: PBx clock equals main clock divided by 2(PBSEL+1).
Note that if PBDIV is written to 0, PBSEL should also be written to 0 to ensure correct operation.
Also note that writing this register clears SR.CKRDY. The register must not be re-written until SR.CKRDY is set.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
PBDIV - - - - PBSEL
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13.7.5 Clock Mask
Name: CPUMASK/HSBMASK/PBAMASK/PBBMASK
Access Type: Read/Write
Offset: 0x020-0x02C
Reset Value: -
• MASK: Clock Mask
If bit n is cleared, the clock for module n is stopped. If bit n is set, the clock for module n is enabled according to the current
power mode. The number of implemented bits in each mask register, as well as which module clock is controlled by each bit, is
shown in Table 13-9.
31 30 29 28 27 26 25 24
MASK[31:24]
23 22 21 20 19 18 17 16
MASK[23:16]
15 14 13 12 11 10 9 8
MASK[15:8]
76543210
MASK[7:0]
Table 13-9. Maskable Module Clocks in ATUC64/128/256L3/4U.
Bit CPUMASK HSBMASK PBAMASK PBBMASK
0 OCD PDCA PDCA FLASHCDW
1 - FLASHCDW INTC HMATRIX
2 - SAU PM SAU
3 - PBB bridge SCIF USBC
4 - PBA bridge AST -
5 - Peripheral Event System WDT -
6 - USBC EIC -
7 - - FREQM -
8 - - GPIO -
9 - - USART0 -
10 - - USART1 -
11 - - USART2 -
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Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
12 - - USART3 -
13 - - SPI -
14 - - TWIM0 -
15 - - TWIM1 -
16 SYSTIMER - TWIS0 -
17 - - TWIS1 -
18 - - PWMA -
19 - - TC0 -
20 - - TC1 -
21 - - ADCIFB -
22 - - ACIFB -
23 - - CAT -
24 - - GLOC -
25 - - AW -
26 - - ABDACB -
27 - - IISC -
31:28 - - - -
Table 13-9. Maskable Module Clocks in ATUC64/128/256L3/4U.
Bit CPUMASK HSBMASK PBAMASK PBBMASK
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13.7.6 PBA Divided Mask
Name: PBADIVMASK
Access Type: Read/Write
Offset: 0x040
Reset Value: 0x0000007F
• MASK: Clock Mask
If bit n is written to zero, the clock divided by 2(n+1) is stopped. If bit n is written to one, the clock divided by 2(n+1) is enabled
according to the current power mode. Table 13-10 shows what clocks are affected by the different MASK bits.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- ------
15 14 13 12 11 10 9 8
--------
76543210
- MASK[6:0]
Table 13-10. Divided Clock Mask
Bit USART0 USART1 USART2 USART3 TC0 TC1
0 - - - - TIMER_CLOCK2 TIMER_CLOCK2
1- - - - - -
2 CLK_USART/
DIV
CLK_USART/
DIV
CLK_USART/
DIV
CLK_USART/
DIV TIMER_CLOCK3 TIMER_CLOCK3
3- - - - - -
4 - - - - TIMER_CLOCK4 TIMER_CLOCK4
5- - - - - -
6 - - - - TIMER_CLOCK5 TIMER_CLOCK5
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13.7.7 Clock Failure Detector Control Register
Name: CFDCTRL
Access Type: Read/Write
Offset: 0x054
Reset Value: 0x00000000
• SFV: Store Final Value
0: The register is read/write
1: The register is read-only, to protect against further accidental writes.
• CFDEN: Clock Failure Detection Enable
0: Clock Failure Detector is disabled
1: Clock Failure Detector is enabled
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
SFV - - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - - - CFDEN
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13.7.8 Unlock Register
Name: UNLOCK
Access Type: Write-only
Offset: 0x058
Reset Value: 0x00000000
To unlock a write protected register, first write to the UNLOCK register with the address of the register to unlock in the
ADDR field and 0xAA in the KEY field. Then, in the next PB access write to the register specified in the ADDR field.
• KEY: Unlock Key
Write this bit field to 0xAA to enable unlock.
• ADDR: Unlock Address
Write the address of the register to unlock to this field.
31 30 29 28 27 26 25 24
KEY
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - - ADDR[9:8]
76543210
ADDR[7:0]
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13.7.9 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x0C0
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - CKRDY - - - - CFD
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13.7.10 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x0C4
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - CKRDY - - - - CFD
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13.7.11 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x0C8
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
This bit is cleared when the corresponding bit in IDR is written to one.
This bit is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - CKRDY - - - - CFD
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13.7.12 Interrupt Status Register
Name: ISR
Access Type: Read-only
Offset: 0x0CC
Reset Value: 0x00000000
0: The corresponding interrupt is cleared.
1: The corresponding interrupt is pending.
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set on a zero-to-one transition of the corresponding bit in the Status Register (SR).
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - CKRDY - - - - CFD
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13.7.13 Interrupt Clear Register
Name: ICR
Access Type: Write-only
Offset: 0x0D0
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in ISR.
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - CKRDY - - - - CFD
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13.7.14 Status Register
Name: SR
Access Type: Read-only
Offset: 0x0D4
Reset Value: 0x00000020
• AE: Access Error
0: No access error has occurred.
1: A write to lock protected register without unlocking it has occurred.
• CKRDY: Clock Ready
0: One of the CPUSEL/PBxSEL registers has been written, and the new clock setting is not yet effective.
1: The synchronous clocks have frequencies as indicated in the CPUSEL/PBxSEL registers.
• CFD: Clock Failure Detected
0: Main clock is running correctly.
1: Failure on main clock detected. Main clock is now running on RCSYS.
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - CKRDY - - - - CFD
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13.7.15 Peripheral Power Control Register
Name: PPCR
Access Type: Read/Write
Offset: 0x004
Reset Value: 0x000001FA
• RSTTM: Reset test mode
0: External reset not in test mode
1: External reset in test mode
• FRC32: Force RC32 out
0: RC32 signal is not forced as output
1: RC32 signal is forced as output
• RSTPUN: Reset Pull-up, active low
0: Pull-up for external reset on
1: Pull-up for external reset off
31 30 29 28 27 26 25 24
PPC[31:24]
23 22 21 20 19 18 17 16
PPC[23:16]
15 14 13 12 11 10 9 8
PPC[15:8]
76543210
PPC[7:0]
Table 13-11. Peripheral Power Control
Bit Name
0 RSTPUN
1 FRC32
2 RSTTM
3 CATRCMASK
4 ACIFBCRCMASK
5 ADCIFBRCMASK
6 ASTRCMASK
7 TWIS0RCMASK
8 TWIS1RCMASK
31:9 -
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• CATRCMASK: CAT Request Clock Mask
0: CAT Request Clock is disabled
1: CAT Request Clock is enabled
• ACIFBRCMASK: ACIFB Request Clock Mask
0: ACIFB Request Clock is disabled
1: ACIFB Request Clock is enabled
• ADCIFBRCMASK: ADCIFB Request Clock Mask
0: ADCIFB Request Clock is disabled
1: ADCIFB Request Clock is enabled
• ASTRCMASK: AST Request Clock Mask
0: AST Request Clock is disabled
1: AST Request Clock is enabled
• TWIS0RCMASK: TWIS0 Request Clock Mask
0: TWIS0 Request Clock is disabled
1: TWIS0 Request Clock is enabled
• TWIS1RCMASK: TWIS1 Request Clock Mask
0: TWIS1 Request Clock is disabled
1: TWIS1 Request Clock is enabled
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
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13.7.16 Reset Cause Register
Name: RCAUSE
Access Type: Read-only
Offset: 0x180
Reset Value: Latest Reset Source
• AWIRE: aWire Reset
This bit is set when the last reset was caused by the aWire.
• JTAG: JTAG Reset
This bit is set when the last reset was caused by the JTAG.
• OCDRST: OCD Reset
This bit is set when the last reset was due to the RES bit in the OCD Development Control register having been written to one.
• SLEEP: Sleep Reset
This bit is set when the last reset was due to the device waking up from the Shutdown sleep mode.
• WDT: Watchdog Reset
This bit is set when the last reset was due to a watchdog time-out.
• EXT: External Reset Pin
This bit is set when the last reset was due to the RESET_N pin being pulled low.
• BOD: Brown-out Reset
This bit is set when the last reset was due to the core supply voltage being lower than the brown-out threshold level.
• POR: Power-on Reset
This bit is set when the last reset was due to the core supply voltage VDDCORE being lower than the power-on threshold level
(the reset is generated by the POR18 detector), or the internal regulator supply voltage being lower than the regulator power-on
threshold level (generated by the POR33 detector), or the internal regulator supply voltage being lower than the minimum
required input voltage (generated by the 3.3V supply monitor SM33).
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - AWIRE - JTAG OCDRST
76543210
- SLEEP - - WDT EXT BOD POR
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13.7.17 Wake Cause Register
Name: WCAUSE
Access Type: Read-only
Offset: 0x184
Reset Value: Latest Wake Source
A bit in this register is set on wake up caused by the peripheral referred to in Table 13-12 on page 239.
31 30 29 28 27 26 25 24
WCAUSE[31:24]
23 22 21 20 19 18 17 16
WCAUSE[23:16]
15 14 13 12 11 10 9 8
WCAUSE[15:8]
76543210
WCAUSE[7:0]
Table 13-12. Wake Cause
Bit Wake Cause
0 CAT
1 ACIFB
2 ADCIFB
3 TWI Slave 0
4 TWI Slave 1
5 WAKE_N
6 ADCIFB Pen Detect
7 USBC
15:8 -
16 EIC
17 AST
31:18 -
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13.7.18 Asynchronous Wake Up Enable Register
Name: AWEN
Access Type: Read/Write
Offset: 0x188
Reset Value: 0x00000000
Each bit in this register corresponds to an asynchronous wake-up source, according to Table 13-13 on page 240.
0: The corresponding wake up is disabled.
1: The corresponding wake up is enabled
31 30 29 28 27 26 25 24
AWEN[31:24]
23 22 21 20 19 18 17 16
AWEN[23:16]
15 14 13 12 11 10 9 8
AWEN[15:8]
76543210
AWEN[7:0]
Table 13-13. Asynchronous Wake-up Sources
Bit Asynchronous Wake-up Source
0 CAT
1 ACIFB
2 ADCIFB
3 TWIS0
4 TWIS1
5 WAKEN
6 ADCIFBPD
7 USBC
31:8 -
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13.7.19 Configuration Register
Name: CONFIG
Access Type: Read-Only
Offset: 0x3F8
Reset Value: -
This register shows the configuration of the PM.
• HSBPEVC:HSB PEVC Clock Implemented
0: HSBPEVC not implemented.
1: HSBPEVC implemented.
• PBD: PBD Implemented
0: PBD not implemented.
1: PBD implemented.
• PBC: PBC Implemented
0: PBC not implemented.
1: PBC implemented.
• PBB: PBB Implemented
0: PBB not implemented.
1: PBB implemented.
• PBA: PBA Implemented
0: PBA not implemented.
1: PBA implemented.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
HSBPEVC - - - PBD PBC PBB PBA
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13.7.20 Version Register
Name: VERSION
Access Type: Read-Only
Offset: 0x3FC
Reset Value: -
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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13.8 Module Configuration
The specific configuration for each PM instance is listed in the following tables. The module bus
clocks listed here are connected to the system bus clocks. Please refer to the “Synchronous
Clocks”, “Peripheral Clock Masking” and “Sleep Modes” sections for details.
Table 13-14. Power Manager Clocks
Clock Name Description
CLK_PM Clock for the PM bus interface
Table 13-15. Register Reset Values
Register Reset Value
VERSION 0x00000420
Table 13-16. Effect of the Different Reset Events
Power-on
Reset
External
Reset
Watchdog
Reset
BOD
Reset
SM33
Reset
CPU Error
Reset
OCD
Reset
JTAG
Reset
CPU/HSB/PBx
(excluding Power Manager)
Y Y Y YY Y YY
32KHz oscillator Y N N N N N N N
RC Oscillator Calibration register Y N N N N N N N
Other oscillator control registers Y Y Y Y Y Y Y Y
AST registers, except interrupt
registers
Y N N NN N NN
Watchdog control register Y Y N Y Y Y Y Y
Voltage Calibration register Y N N N N N N N
SM33 control register Y Y Y Y Y Y Y Y
BOD control register Y Y Y N Y Y Y Y
Clock control registers Y Y Y Y Y Y Y Y
OCD system and OCD registers Y Y N Y Y Y N Y
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14. System Control Interface (SCIF)
Rev: 1.1.0.0
14.1 Features
• Supports crystal oscillator 0.45-16MHz (OSC0)
• Supports Digital Frequency Locked Loop 20-150MHz (DFLL)
• Supports Phase Locked Loop 80-240MHz (PLL)
• Supports 32KHz ultra-low-power oscillator (OSC32K)
• Supports 32kHz RC oscillator (RC32K)
• Integrated low-power RC oscillator (RCSYS)
• Generic clocks (GCLK) with wide frequency range provided
• Generic Clock Prescaler
• Controls Bandgap
• Controls Brown-out detectors (BOD) and supply monitors
• Controls Voltage Regulator (VREG) behavior and calibration
• Controls Temperature Sensor
• Controls Supply Monitor 33 (SM33) operating modes and calibration
• Controls 120MHz integrated RC Oscillator (RC120M)
• Four 32-bit general-purpose backup registers
14.2 Overview
The System Control Interface (SCIF) controls the oscillators, Generic Clocks, BODs, Bandgap,
VREG, Temperature Sensor, and Backup Registers.
14.3 I/O Lines Description
14.4 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
Table 14-1. I/O Lines Description
Pin Name Pin Description Type
RC32OUT RC32 output at startup Output
XIN0 Crystal 0 Input Analog/Digital
XIN32 Crystal 32 Input (primary location) Analog/Digital
XIN32_2 Crystal 32 Input (secondary location) Analog/Digital
XOUT0 Crystal 0 Output Analog
XOUT32 Crystal 32 Output (primary location) Analog
XOUT32_2 Crystal 32 Output (secondary location) Analog
GCLK9-GCLK0 Generic Clock Output Output
GCLK_IN2-GCLK_IN0 Generic Clock Input Input
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14.4.1 I/O Lines
The SCIF provides a number of generic clock outputs, which can be connected to output pins,
multiplexed with GPIO lines. The programmer must first program the GPIO controller to assign
these pins to their peripheral function. If the I/O pins of the SCIF are not used by the application,
they can be used for other purposes by the GPIO controller. Oscillator pins are also multiplexed
with GPIO. When oscillators are used, the related pins are controlled directly by the SCIF, overriding
GPIO settings.
RC32OUT will be output after reset, and the GPIO controller can assign this pin to other peripheral
function after start-up.
14.4.2 Power Management
The BODs and all the oscillators, except the 32KHz oscillator (OSC32K) are turned off in some
sleep modes and turned automatically on when the device wakes up. The Voltage Regulator is
set in low power mode in some sleep modes and automatically set back in normal mode when
the device wakes up. Please refer to the Power Manager chapter for details.
The BOD control registers will not be reset by the Power Manager on a BOD reset.
14.4.3 Clocks
The SCIF controls all oscillators in the device. The oscillators can be used as source for the CPU
and peripherals. Selection of source is done in the Power Manager. The oscillators can also be
used as source for generic clocks.
14.4.4 Interrupts
The SCIF interrupt request line is connected to the interrupt controller. Using the SCIF interrupt
requires the interrupt controller to be programmed first.
14.4.5 Debug Operation
The SCIF does not interact with debug operations.
14.5 Functional Description
14.5.1 Oscillator (OSC) Operation
Rev: 1.1.1.0
The main oscillator (OSCn) is designed to be used with an external 0.450 to 16MHz crystal and
two biasing capacitors, as shown in the Electrical Characteristics chapter, or with an external
clock connected to the XIN. The oscillator can be used as source for the main clock in the
device, as described in the Power Manager chapter. The oscillator can be used as source for the
generic clocks, as described in the Generic Clocks section.
The oscillator is disabled by default after reset. When the oscillator is disabled, the XIN and
XOUT pins can be used as general purpose I/Os. When the oscillator is enabled, the XIN and
XOUT pins are controlled directly by the SCIF, overriding GPIO settings. When the oscillator is
configured to use an external clock, the clock must be applied to the XIN pin while the XOUT pin
can be used as general purpose I/O.
The oscillator is enabled by writing a one to the Oscillator Enable bit in the Oscillator Control register
(OSCCTRLn.OSCEN). Operation mode (external clock or crystal) is selected by writing to
the Oscillator Mode bit in OSCCTRLn (OSCCTRLn.MODE). The oscillator is automatically dis-
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abled in certain sleep modes to reduce power consumption, as described in the Power Manager
chapter.
After a hard reset, or when waking up from a sleep mode where the oscillators were disabled,
the oscillator will need a certain amount of time to stabilize on the correct frequency. This startup
time can be set in the OSCCTRLn register.
The SCIF masks the oscillator outputs during the start-up time, to ensure that no unstable clocks
propagate to the digital logic.
The OSCn Ready bit in the Power and Clock Status Register (PCLKSR.OSCnRDY) is set when
the oscillator is stable and ready to be used as clock source. An interrupt can be generated on a
zero-to-one transition on OSCnRDY if the OSCnRDY bit in the Interrupt Mask Register
(IMR.OSCnRDY) is set. This bit is set by writing a one to the corresponding bit in the Interrupt
Enable Register (IER.OSCnRDY).
14.5.2 32KHz Oscillator (OSC32K) Operation
Rev: 1.1.0.1
The 32KHz oscillator operates as described for the oscillator above. The 32KHz oscillator can
be used as source clock for the Asynchronous Timer (AST) and the Watchdog Timer (WDT).
The 32KHz oscillator can also be used as source for the generic clocks.
The oscillator is disabled by default after reset. When the oscillator is disabled, the XIN32 and
XOUT32 pins can be used as general-purpose I/Os. When the oscillator is enabled, the XIN32
and XOUT32 pins are controlled directly by the SCIF, overriding GPIO settings. When the oscillator
is configured to use an external clock, the clock must be applied to the XIN32 pin while the
XOUT32 pin can be used as general-purpose I/O.
The oscillator is enabled writing a one to the OSC32 Enable bit in the 32KHz Oscillator Control
Register (OSCCTRL32OSC32EN). The oscillator is disabled by writing a zero to the OSC32EN
bit, while keeping the other bits unchanged. Writing to OSC32EN while also writing to other bits
may result in unpredictable behavior. Operation mode (external clock or crystal) is selected by
writing to the Oscillator Mode bit in OSCCTRL32 (OSCCTRL32.MODE). The oscillator is an
ultra-low-power design and remains enabled in all sleep modes.
The start-up time of the 32KHz oscillator is selected by writing to the Oscillator Start-up Time
field in the OSCCTRL32 register (OSCCTRL32.STARTUP). The SCIF masks the oscillator output
during the start-up time, to ensure that no unstable clock cycles propagate to the digital logic.
The OSC32 Ready bit in the Power and Clock Status Register (PCLKSR.OSC32RDY) is set
when the oscillator is stable and ready to be used as clock source. An interrupt can be generated
on a zero-to-one transition on PCLKSR.OSC32RDY if the OSC32RDY bit in the Interrupt
Mask Register (IMR.OSC32RDY) is set. This bit is set by writing a one to the corresponding bit
in the Interrupt Enable Register (IER.OSC32RDY).
.As a crystal oscillator usually requires a very long start-up time (up to 1 second), the 32KHz
oscillator will keep running across resets, except a Power-on Reset (POR).
The 32KHz oscillator also has a 1KHz output. This is enabled by writing a one to the Enable
1KHz output bit in OSCCTRL32 register (OSCCTRL32.EN1K). If the 32KHz output clock is not
needed when 1K is enabled, this can be disabled by writing a zero to the Enable 32KHz output
bit in the OSCCTRL32 register (OSCCTRL32.EN32K). OSCCTRL32.EN32K is set after a POR.
The 32KHz oscillator has two possible sets of pins. To select between them write to the Pin
Select bit in the OSCCTRL32 register (OSCCTRL32.PINSEL). If the 32KHz oscillator is to be
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used in Shutdown mode, PINSEL must be written to one, and XIN32_2 and XOUT32_2 must be
used.
14.5.3 PLL Operation
Rev: 1.1.0.0
The device contains one Phase Locked Loop (PLL), which is controlled by the Phase Locked
Loop Interface (PLLIF). The PLL is disabled by default, but can be enabled to provide high frequency
source clocks for synchronous or generic clocks. The PLL can use different clock
sources as reference clock, please refer to the “PLL Clock Sources” table in the SCIF Module
Configuration section for details. The PLL output is divided by a multiplication factor, and the
PLL compares the phase of the resulting clock to the reference clock. The PLL will adjust its output
frequency until the two compared clocks phases are equal, thus locking the output frequency
to a multiple of the reference clock frequency.
When the PLL is switched on, or when changing the clock source or multiplication factor for the
PLL, the PLL is unlocked and the output frequency is undefined. The PLL clock for the digital
logic is automatically masked when the PLL is unlocked, to prevent the connected digital logic
from receiving a too high frequency and thus become unstable.
The PLL can be configured by writing the PLL Control Register (PLLn). To prevent unexpected
writes due to software bugs, write access to the PLLn register is protected by a locking mechanism,
for details please refer to the UNLOCK register description.
Figure 14-1. PLL with Control Logic and Filters
14.5.3.1 Enabling the PLL
Before the PLL is enabled it must be set up correctly. The PLL Oscillator Select field (PLLOSC)
selects a source for the reference clock. The PLL Multiply Factor (PLLMUL) and PLL Division
Phase
Detector
Output
Divider
Source
clocks
PLLOSC PLLOPT[0]
PLLMUL
Lock bit
Mask PLL clock
Input
Divider
PLLDIV
1/2
PLLOPT[1]
0
1
VCO
fvco fPLL
Lock
Counter
fREF
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Factor (PLLDIV) fields must be written with the multiplication and division factors, respectively.
The PLLMUL must always be greater than 1, creating the PLL frequency:
fvco = (PLLMUL+1)/PLLDIV • fREF, if PLLDIV >0
fvco = 2•(PLLMUL+1) • fREF, if PLLDIV = 0
The PLL Options (PLLOPT) field should be configured to proper values according to the PLL
operating frequency. The PLLOPT field can also be configured to divide the output frequency of
the PLL by 2 and Wide-Bandwidth mode, which allows faster startup time and out-of-lock time.
It is not possible to change any of the PLL configuration bits when the PLL is enabled, Any write
to PLLn while the PLL is enabled will be discarded.
After setting up the PLL, the PLL is enabled by writing a one to the PLL Enable (PLLEN) bit in
the PLLn register.
14.5.3.2 Disabling the PLL
The PLL is disabled by writing a zero to the PLL Enable (PLLEN) bit in the PLLn register. After
disabling the PLL, the PLL configuration fields becomes writable.
14.5.3.3 PLL Lock
The lock signal for each PLL is available as a PLLLOCKn flag in the PCLKSR register. If the lock
for some reason is lost, the PLLLOCKLOSTn flag in PCLKSR register will be set. An interrupt
can be generated on a 0 to 1 transition of these bits.
14.5.4 Digital Frequency Locked Loop (DFLL) Operation
Rev: 2.1.0.1
The DFLL is controlled by the Digital Frequency Locked Loop Interface (DFLLIF). The DFLL is
disabled by default, but can be enabled to provide a high-frequency source clock for synchronous
and generic clocks.
Features:
• Internal oscillator with no external components
• 20-150MHz frequency in closed loop mode
• Can operate standalone as a high-frequency programmable oscillator in open loop mode
• Can operate as an accurate frequency multiplier against a known frequency in closed loop
mode
• Optional spread-spectrum clock generation
• Very high-frequency multiplication supported - can generate all frequencies from a 32KHz
clock
The DFLL can operate in both open loop mode and closed loop mode. In closed loop mode a
low frequency clock with high accuracy can be used as reference clock to get high accuracy on
the output clock (CLK_DFLL).
To prevent unexpected writes due to software bugs, write access to the configuration registers is
protected by a locking mechanism. For details please refer to the UNLOCK register description.
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Figure 14-2. DFLLIF Block Diagram
14.5.4.1 Enabling the DFLL
The DFLL is enabled by writing a one to the Enable bit (EN) in the DFLLn Configuration Register
(DFLLnCONF). No other bits or fields in DFLLnCONF must be changed simultaneously, or
before the DFLL is enabled.
14.5.4.2 Internal synchronization
Due to multiple clock domains in the DFLLIF, values in the DFLLIF configuration registers need
to be synchronized to other clock domains. The status of this synchronization can be read from
the Power and Clocks Status Register (PCLKSR). Before writing to a DFLLIF configuration register,
the user must check that the DFLLn Synchronization Ready bit (DFLLnRDY) in PCLKSR is
set. When this bit is set, the DFLL can be configured, and CLK_DFLL is ready to be used. Any
write to a DFLLIF configuration register while DFLLnRDY is cleared will be ignored.
Before reading the value in any of the DFLL configuration registers a one must be written to the
Synchronization bit (SYNC) in the DFLLn Synchronization Register (DFLLnSYNC). The DFLL
configuration registers are ready to be read when PCLKSR.DFLLnRDY is set.
14.5.4.3 Disabling the DFLL
The DFLL is disabled by writing a zero to DFLLnCONF.EN. No other bits or fields in DFLLnCONF
must be changed simultaneously.
After disabling the DFLL, PCLKSR.DFLLnRDY will not be set. It is not required to wait for
PCLKSR.DFLLnRDY to be set before re-enabling the DFLL.
14.5.4.4 Open loop operation
After enabling the DFLL, open loop mode is selected by writing a zero to the Mode Selection bit
(MODE) in DFLLnCONF. When operating in open loop mode the output frequency of the DFLL
will be determined by the values written to the Coarse Calibration Value field (COARSE) and the
Fine Calibration Value field (FINE) in the DFLLnCONF register. When writing to COARSE and
DFLL
COARSE
FINE
8
9
CLK_DFLL
IMUL
FMUL 32
CLK_DFLLIF_REF
FREQUENCY
TUNER
DFLLLOCKC
DFLLLOCKLOSTC
DFLLLOCKF
DFLLLOCKLOSTF
DFLLLOCKA
DFLLLOCKLOSTA
CSTEP
FSTEP 8+9 CLK_DFLLIF_DITHER
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FINE, be aware that the output frequency must not exceed the maximum frequency of the
device after the division in the clock generator. It is possible to change the value of COARSE
and FINE, and thereby the output frequency of the DFLL, while the DFLL is enabled and in use.
The DFLL clock is ready to be used when PCLKSR.DFLLnRDY is cleared after enabling the
DFLL.
The frequency range in open loop mode is 20-150MHz, but maximum frequency can be higher,
and the minimum frequency can be lower. The best way to start the DFLL at a specific frequency
in open loop mode is to first configure it for closed loop mode, see Section 14.5.4.5. When a lock
is achieved, read back the COARSE and FINE values and switch to open loop mode using these
values. An alternative approach is to use the Frequency Meter (FREQM) to monitor the DFLL
frequency and adjust the COARSE and FINE values based on measurement results form the
FREQM. Please refer to the FREQM chapter for more information on how to use it. Note that the
output frequency of the DFLL will drift when in open loop mode due to temperature and voltage
changes. Please refer to the Electrical Characteristics chapter for details.
14.5.4.5 Closed loop operation
The DFLL must be correctly configured before closed loop operation can be enabled. After
enabling the DFLL, enable and select a reference clock (CLK_DFLLIF_REF).
CLK_DFLLIF_REF is a generic clock, please refer to Generic Clocks section for details. Then
set the maximum step size allowed in finding the COARSE and FINE values by setting the
Coarse Maximum Step field (CSTEP) and Fine Maximum Step field (FSTEP) in the DFLLn Maximum
Step Register (DFLLnSTEP). A small step size will ensure low overshoot on the output
frequency, but can typically result in longer lock times. A high value might give a big overshoot,
but can typically give faster locking. DFLLnSTEP.CSTEP and DFLLnSTEP.FSTEP must be
lower than 50% of the maximum value of DFLLnCONF.COARSE and DFLLnCONF.FINE
respectively. Then select the multiplication factor in the Integer Multiply Factor field (IMUL) and
the Fractional Multiply field (FMUL) in the DFLLn Multiplier Register (DFLLnMUL). Care must be
taken when choosing IMUL and FMUL so the output frequency does not exceed the maximum
frequency of the device. Start the closed loop mode by writing a one to DFLLnCONF.MODE bit.
The frequency of CLK_DFLL (fDFLL) is given by:
where fREF is the frequency of CLK_DFLLIF_REF. COARSE and FINE in DFLLnCONF are readonly
in closed loop mode, and are controlled by the DFLLIF to meet user specified frequency.
The values in COARSE when the closed loop mode is enabled is used by the frequency tuner as
a starting point for COARSE. Setting COARSE to a value close to the final value will reduce the
time needed to get a lock on COARSE.
Frequency locking
The locking of the frequency in closed loop mode is divided into three stages. In the COARSE
stage the control logic quickly finds the correct value for DFLLnCONF.COARSE and thereby
sets the output frequency to a value close to the correct frequency. The DFLLn Locked on
Coarse Value bit (DFLLnLOCKC) in PCLKSR will be set when this is done. In the FINE stage the
control logic tunes the value in DFLLnCONF.FINE so the output frequency will be very close to
the desired frequency. DFLLn Locked on Fine Value bit (DFLLnLOCKF) in PCLKSR will be set
when this is done. In the ACCURATE stage the DFLL frequency tuning mechanism uses dithering
on the FINE bits to obtain an accurate average output frequency. DFLLn Locked on Accurate
Value bit (DFLLnLOCKA) in PCLKSR will be set when this is done. The ACCURATE stage will
f
DFLL IMUL FMUL
216
+ ----------------- f
REF =
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only be executed if the Dithering Enable bit (DITHER) in DFLLnCONF has been written to a one.
If DITHER is written to a zero DFLLnLOCKA will never occur. If dithering is enabled, the frequency
of the dithering is decided by a generic clock (CLK_DFLLIF_DITHER). This clock has to
be set up correctly before enabling dithering. Please refer to the Generic Clocks section for
details.
Figure 14-3. DFLL Closed loop State Diagram
When dithering is enabled the accuracy of the average output frequency of the DFLL will be
higher. However, the actual frequency will be alternating between two frequencies. If a fixed frequency
is required, the dithering should not be enabled.
Figure 14-4. DFLL Locking in Closed loop
CLK_DFLL is ready to be used when the DFLLn Synchronization Ready bit (DFLLnRDY) in
PCLKSR is set after enabling the DFLL. However, the accuracy of the output frequency depends
on which locks are set.
For lock times, please refer to the Electrical Characteristics chapter.
Measure
fDFLLn
Calculate
new
COARSE
value
DFLLnLOCKC
0
Calculate
new FINE
value
DFLLnLOCKF
0
1 1 DFLLnLOCKA
Calculate
new
dithering
dutycycle
0
Compensate
for
drift
1 DITHER 1
Compensate
for
drift
0
Initial
frequency
Target
frequency
DFLLnLOCKC DFLLnLOCKF DFLLnLOCKA
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Drift compensation
The frequency tuner will automatically compensate for drift in the fDFLL without losing either of the
locks. If the FINE value overflows or underflows, which should normally not happen, but could
occur due to large drift in temperature and voltage, all locks will be lost, and the COARSE and
FINE values will be recalibrated as described earlier. If any lock is lost the corresponding bit in
PCLKSR will be set, DFLLn Lock Lost on Coarse Value bit (DFLLnLOCKLOSTC) for lock lost on
COARSE value, DFLLn Lock Lost on Fine Value bit (DFLLnLOCKLOSTF) for lock lost on FINE
value and DFLLn Lock Lost on Accurate Value bit (DFLLnLOCKLOSTA) for lock lost on ACCURATE
value. The corresponding lock status bit will be cleared when the lock lost bit is set, and
vice versa.
Reference clock stop detection
If CLK_DFLLIF_REF stops or is running at a very slow frequency, the DFLLn Reference Clock
Stopped bit (DFLLnRCS) in PCLKSR will be set. Note that the detection of the clock stop will
take a long time. The DFLLIF operate as if it was in open loop mode if it detects that the reference
clock has stopped. This means that the COARSE and FINE values will be kept constant
while PCLKSR.DFLLnRCS is set. Closed loop mode operation will automatically resume if the
CLK_DFLLIF_REF is restarted, and compensate for any drift during the time CLK_DFLLIF_REF
was stopped. No locks will be lost.
Frequency error measurement
The ratio between CLK_DFLLIF_REF and CLK_DFLL is measured automatically by the DFLLIF.
The difference between this ratio and DFLLnMUL is stored in the Multiplication Ratio Difference
field (RATIODIFF) in the DFLLn Ratio Register (DFLLnRATIO). The relative error on CLK_DFLL
compared to the target frequency can be calculated as follows:
where is the number of reference clock cycles the DFLLIF is using for calculating the
ratio.
14.5.4.6 Dealing with delay in the DFLL
The time from selecting a new frequency until this frequency is output by the DFLL, can be up to
several micro seconds. If the difference between the desired output frequency (CLK_DFLL) and
the frequency of CLK_DFLLIF_REF is small this can lead to an instability in the DFLLIF locking
mechanism, which can prevent the DFLLIF from achieving locks. To avoid this, a chill cycle
where the CLK_DFLL frequency is not measured can be enabled. The chill cycle is enabled by
writing a one to the Chill Cycle Enable (CCEN) bit in the DFLLnCONF register. Enabling chill
cycles might double the lock time,
Another solution to the same problem can be to use less strict lock requirements. This is called
Quick Lock (QL), which is enabled by writing a one to the Quick Lock Enable (QLEN) bit in the
DFLLnCONF register. The QL might lead to bigger spread in the outputted frequency than chill
cycles, but the average output frequency is the same.
If the target frequency is below 40MHz, one of these methods should always be used.
14.5.4.7 Spread Spectrum Generator (SSG)
When the DFLL is used as the main clock source for the device, the EMI radiated from the
device will be synchronous to fDFLL. To provide better Electromagnetic Compatibility (EMC) the
error RATIODIFF fREF
2NUMREF f
DFLL = ------------------------------------------------
2NUMREF
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DFLLIF can provide a clock with the energy spread in the frequency domain. This is done by
adding or subtracting values from the FINE value. SSG is enabled by writing a one to the Enable
bit (EN) in the DFLLn Spread Spectrum Generator Control Register (DFLLnSSG).
A generic clock sets the rate at which the SSG changes the frequency of the DFLL clock to generate
a spread spectrum (CLK_DFLLIF_DITHER). This is the same clock used by the dithering
mechanism. The frequency of this clock should be higher than fREF to ensure that the DFLLIF
can lock. Please refer to the Generic clocks section for details.
Optionally, the clock ticks can be qualified by a Pseudo Random Binary Sequence (PRBS) if the
PRBS bit in DFLLnSSG is one. This reduces the modulation effect of CLK_DFLLIF_DITHER frequency
onto fDFLL.
The amplitude of the frequency variation can be selected by setting the SSG Amplitude field
(AMPLITUDE) in DFLLnSSG. If AMPLITUDE is zero the SSG will toggle on the LSB of the FINE
value. If AMPLITUDE is one the SSG will add the sequence {1,-1, 0} to FINE.
The step size of the SSG is selected by writing to the SSG Step Size field (STEPSIZE) in
DFLLnSSG. STEPSIZE equal to zero or one will result in a step size equal to one. If the step
size is set to n, the output value from the SSG will be incremented/decremented by n on every
tick of the source clock.
The Spread Spectrum Generator is available in both open and closed loop mode.
When spread spectrum is enabled in closed loop mode, and the AMPLITUDE is high, an overflow/underflow
in FINE is more likely to occur.
Figure 14-5. Spread Spectrum Generator Block Diagram.
14.5.4.8 Wake from sleep modes
The DFLLIF may optionally reset its lock bits when waking from a sleep mode which disables the
DFLL. This is configured by the Lose Lock After Wake (LLAW) bit in DFLLnCONF register. If
DFLLnCONF.LLAW is written to zero the DFLL will be re-enabled and start running with the
same configuration as before going to sleep even if the reference clock is not available. The
locks will not be lost. When the reference clock has restarted, the FINE tracking will quickly compensate
for any frequency drift during sleep. If a one is written to DFLLnCONF.LLAW before
going to a sleep mode where the DFLL is turned off, the DFLLIF will lose all its locks when waking
up, and needs to regain these through the full lock sequence.
14.5.4.9 Accuracy
There are mainly three factors that decide the accuracy of the fDFLL. These can be tuned to
obtain maximum accuracy when fine lock is achieved.
Pseudorandom
Binary Sequence Spread Spectrum
Generator
FINE
9
To DFLL CLK_DFLLIF_DITHER
AMPLITUDE,
STEPSIZE PRBS
1
0
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• FINE resolution: The frequency step between two FINE values. This is relatively smaller for
high output frequencies.
• Resolution of the measurement: If the resolution of the measured fDFLL is low, i.e. the ratio
between CLK_DFLL frequency and CLK_DFLLIF_REF is small, then the DFLLIF might lock
at a frequency that is lower than the targeted frequency. It is recommended to use a
reference clock frequency of 32 KHz or lower to avoid this issue for low target frequencies.
• The accuracy of the reference clock.
14.5.4.10 Interrupts
A interrupt can be generated on a zero-to-one transaction on DFLLnLOCKC, DFLLnLOCKF,
DFLLnLOCKA, DFLLnLOCKLOSTC, DFLLnLOCKLOSTF, DFLLnLOCKLOSTA, DFLLnRDY or
DFLLnRCS.
14.5.5 Brown-Out Detection (BOD)
Rev: 1.2.0.0
The Brown-Out Detector monitors the VDDCORE supply pin and compares the supply voltage
to the brown-out detection level.
The BOD is disabled by default, and is enabled by writing to the BOD Control field in the BOD
Control Register (BOD.CTRL). This field can also be updated by flash fuses.
The BOD is powered by VDDIO and will not be powered during Shutdown sleep mode.
To prevent unexpected writes to the BOD register due to software bugs, write access to this register
is protected by a locking mechanism. For details please refer to the UNLOCK register
description.
To prevent further modifications by software, the content of the BOD register can be set as readonly
by writing a one to the Store Final Value bit (BOD.SFV). When this bit is one, software can
not change the BOD register content. This bit is cleared after flash calibration and after a reset
except after a BOD reset.
The brown-out detection level is selected by writing to the BOD Level field in BOD
(BOD.LEVEL). Please refer to the Electrical Characteristics chapter for parametric details.
If the BOD is enabled (BOD.CTRL is one or two) and the supply voltage goes below the detection
level, the Brown-Out Detection bit in the Power and Clocks Status Register
(PCLKSR.BODDET) is set. This bit is cleared when the supply voltage goes above the detection
level. An interrupt request will be generated on a zero-to-one transition on PCLKSR.BODDET if
the Brown-Out Detection bit in the Interrupt Mask Register (IMR.BODDET) is set. This bit is set
by writing a one to the corresponding bit in the Interrupt Enable Register (IER.BODDET).
If BOD.CTRL is one, a BOD reset will be generated when the supply voltage goes below the
detection level. If BOD.CTRL is two, the device will not be reset.
Writing a one to the BOD Hysteresis bit in BOD (BOD.HYST) will add a hysteresis on the BOD
detection level.
Note that the BOD must be disabled before changing BOD.LEVEL, to avoid spurious reset or
interrupt. After enabling the BOD, the BOD output will be masked during one half of a RCSYS
clock cycle and two main clocks cycles to avoid false results.
When the JTAG or aWire is enabled, the BOD reset and interrupt are masked.
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The CTRL, HYST, and LEVEL fields in the BOD Control Register are loaded factory defined calibration
values from flash fuses after a reset. If the Flash Calibration Done bit in the BOD Control
Register (BOD.FCD) is zero, the flash calibration will be redone after any reset, and the
BOD.FCD bit will be set before program execution starts in the CPU. If BOD.FCD is one, the
flash calibration is redone after any reset except for a BOD reset. The BOD.FCD bit is cleared
after a reset, except for a BOD reset. BOD.FCD is set when these fields have been updated after
a flash calibration. It is possible to override the values in the BOD.CTRL, BOD.HYST, and
BOD.LEVEL fields after reset by writing to the BOD Control Register. Please refer to the Fuse
Settings chapter for more details about BOD fuses and how to program the fuses.
Figure 14-6. BOD Block Diagram
14.5.6 Bandgap
Rev: 1.2.0.0
The flash memory, the BOD, and the Temperature Sensor need a stable voltage reference to
operate. This reference voltage is provided by an internal Bandgap voltage reference. This reference
is automatically turned on at start-up and turned off during some sleep modes to save
power. The Bandgap reference is powered by the internal regulator supply voltage and will not
be powered during Shutdown sleep mode. Please refer to the Power Manager chapter for
details.
VDDCORE
POR18 BOD
SCIF
POWER MANAGER(PM) INTC
Reset
Bod
Detected
Enable
BO
D Hyst
BOD
Level
Reset
In et rrupt
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14.5.7 System RC Oscillator (RCSYS)
Rev: 1.1.1.0
The system RC oscillator has a startup time of three cycles, and is always available except in
some sleep modes. Please refer to the Power Manager chapter for details. The system RC oscillator
operates at a nominal frequency of 115kHz, and is calibrated using the Calibration Value
field (CALIB) in the RC Oscillator Calibration Register (RCCR). After a Power-on Reset (POR),
the RCCR.CALIB field is loaded with a factory defined value stored in the Flash fuses. Please
refer to the Fuse setting chapter for more details about RCCR fuses and how to program the
fuses.
If the Flash Calibration Done (FCD) bit in the RCCR is zero at any reset, the flash calibration will
be redone and the RCCR.FCD bit will be set before program execution starts in the CPU. If the
RCCR.FCD is one, the flash calibration will only be redone after a Power-on Reset.
To prevent unexpected writes to RCCR due to software bugs, write access to this register is protected
by a locking mechanism. For details please refer to the UNLOCK register description.
Although it is not recommended to override default factory settings, it is still possible to override
the default values by writing to RCCR.CALIB.
14.5.8 Voltage Regulator (VREG)
Rev: 1.1.0.0
The embedded voltage regulator can be used to provide the VDDCORE voltage from the internal
regulator supply voltage. It is controlled by the Voltage Regulator Calibration Register
(VREGCR). The voltage regulator is enabled by default at start-up but can be disabled by software
if an external voltage is provided on the VDDCORE pin. The VREGCR also contains bits to
control the POR18 detector and the POR33 detector.
14.5.8.1 Register protection
To prevent unexpected writes to VREGCR due to software bugs, write access to this register is
protected by a locking mechanism. For details please refer to the UNLOCK register description.
To prevent further modifications by software, the content of the VREGCR register can be set as
read-only by writing a one to the Store Final Value bit (VREGCR.SFV). Once this bit is set, software
can not change the VREGCR content until a Power-on Reset (POR) is applied.
14.5.8.2 Controlling voltage regulator output
The voltage regulator is always enabled at start-up, i.e. after a POR or when waking up from
Shutdown mode. It can be disabled by software by writing a zero to the Enable bit
(VREGCR.EN). This bit is set after a POR. Because of internal synchronization, the voltage regulator
is not immediately enabled or disabled. The actual state of the voltage regulator can be
read from the ON bit (VREGCR.ON).
The voltage regulator output level is controlled by the Select VDD field (SELVDD) in VREGCR.
The default value of this field corresponds to a regulator output voltage of 1.8V. Other values of
this field are not defined, and it is not recommended to change the value of this field.
The Voltage Regulator OK bit (VREGCR.VREGOK) bit indicates when the voltage regulator output
has reached the voltage threshold level.
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14.5.8.3 Factory calibration
After a Power-on Reset (POR) the VREGCR.CALIB field is loaded with a factory defined calibration
value. This value is chosen so that the normal output voltage of the regulator after a powerup
is 1.8V.
Although it is not recommended to override default factory settings, it is still possible to override
these default values by writing to VREGCR.CALIB.
If the Flash Calibration Done bit in VREGCR (VREGCR.FCD) is zero, the flash calibration will be
redone after any reset, and the VREGCR.FCD bit will be set before program execution starts in
the CPU. If VREGCR.FCD is one, the flash calibration will only be redone after a POR.
14.5.8.4 POR33 control
VREGCR includes control bits for the Power-on Reset 3.3V (POR33) detector that monitors the
internal regulator supply voltage. The POR33 detector is enabled by default but can be disabled
by software to reduce power consumption. The 3.3V Supply Monitor (SM33) can then be used to
monitor the regulator power supply.
The POR33 detector is disabled by writing a zero to the POR33 Enable bit
(VREGCR.POR33EN). Because of internal synchronisation, the POR33 detector is not immediately
enabled or disabled. The actual state of the POR33 detector can be read from the POR33
Status bit (VREGCR.POR33STATUS).
The 32kHz RC oscillator (RC32K) must be enabled before disabling the POR33 detector. Once
the POR33 detector has been disabled, the RC32K oscillator can be disabled again.
To avoid spurious resets, it is mandatory to mask the Power-on Reset when enabling or disabling
the POR33 detector. The Power-on Reset generated by the POR33 detector can be
ignored by writing a one to the POR33 Mask bit (VREGCR.POR33MASK). Because of internal
synchronization, the masking is not immediately effective, so software should wait for the
VREGCR.POR33MASK to read as a one before assuming the masking is effective.
The output of the POR33 detector is zero if the internal regulator supply voltage is below the
POR33 power-on threshold level, and one if the internal regulator supply voltage is above the
POR33 power-on threshold level. This output (before masking) can be read from the POR33
Value bit (VREGCR.POR33VALUE).
14.5.8.5 POR18 control
VREGCR includes control bits for the Power-on Reset 1.8V (POR18) detector that monitors the
VDDCORE voltage. The POR18 detector is enabled by default but can be disabled by software
to reduce power consumption.
The POR18 detector is disabled by writing a zero to the POR18 Enable bit
(VREGCR.POR18EN). Because of internal synchronization, the POR18 detector is not immediately
enabled or disabled. The actual state of the POR18 detector can be read from the POR18
Status bit (VREGCR.POR18STATUS).
Please note that the POR18 detector cannot be disabled while the JTAG or aWire debug interface
is used. Writing a zero to VREGCR.POR18EN bit will have no effect.
To avoid spurious resets, it is mandatory to mask the Power-on Reset when enabling or disabling
the POR18 detector. The Power-on Reset generated by the POR18 detector can be
ignored by writing a one to the POR18 Mask bit (VREGCR.POR18MASK). Because of internal
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synchronisation, the masking is not immediately effective, so software should wait for the
VREGCR.POR18MASK to read as one before assuming the masking is effective.
The output of the POR18 detector is zero if the VDDCORE voltage is below the POR18 poweron
threshold level, and one if the VDDCORE voltage is above the POR18 power-on threshold
level. The output of the POR18 detector (before masking) can be read from the POR18 Value bit
(VREGCR.POR18VALUE).
14.5.9 3.3 V Supply Monitor (SM33)
Rev: 1.1.0.0
The 3.3V supply monitor is a specific voltage detector for the internal regulator supply voltage. It
will indicate if the internal regulator supply voltage is above the minimum required input voltage
threshold. The user can choose to generate either a Power-on Reset (POR) and an interrupt
request, or only an interrupt request, when the internal regulator supply voltage drops below this
threshold.
Please refer to the Electrical Characteristics chapter for parametric details.
14.5.9.1 Register protection
To prevent unexpected writes to SM33 register due to software bugs, write access to this register
is protected by a locking mechanism. For details please refer to the UNLOCK register
description.
To prevent further modifications by software, the content of the register can be set as read-only
by writing a one to the Store Final Value bit (SM33.SFV). When this bit is one, software can not
change the SM33 register content until the device is reset.
14.5.9.2 Operating modes
The SM33 is disabled by default and is enabled by writing to the Supply Monitor Control field in
the SM33 control register (SM33.CTRL). The current state of the SM33 can be read from the
Supply Monitor On Indicator bit in SM33 (SM33.ONSM). Enabling the SM33 will disable the
POR33 detector.
The SM33 can operate in continuous mode or in sampling mode. In sampling mode, the SM33 is
periodically enabled for a short period of time, just enough to make a a measurement, and then
disabled for a longer time to reduce power consumption.
By default, the SM33 operates in sampling mode during DeepStop and Static mode and in continuous
mode for other sleep modes. Sampling mode can also be forced during sleep modes
other than DeepStop and Static, and during normal operation, by writing a one to the Force
Sampling Mode bit in the SM33 register (SM33.FS).
The user can select the sampling frequency by writing to the Sampling Frequency field in SM33
(SM33.SAMPFREQ). The sampling mode uses the 32kHz RC oscillator (RC32K) as clock
source. The 32kHz RC oscillator is automatically enabled when the SM33 operates in sampling
mode.
14.5.9.3 Interrupt and reset generation
If the SM33 is enabled (SM33.CTRL is one or two) and the regulator supply voltage drops below
the SM33 threshold, the SM33DET bit in the Power and Clocks Status Register
(PCLKSR.SM33DET) is set. This bit is cleared when the supply voltage goes above the threshold.
An interrupt request is generated on a zer-to-one transition of PCLKSR.SM33DET if the
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Supply Monitor 3.3V Detection bit in the Interrupt Mask Register (IMR.SM33DET) is set. This bit
is set by writing a one to the corresponding bit in the Interrupt Enable Register (IER.SM33DET).
If SM33.CTRL is one, a POR will be generated when the voltage drops below the threshold. If
SM33.CTRL is two, the device will not be reset.
14.5.9.4 Factory calibration
After a reset the SM33.CALIB field is loaded with a factory defined value. This value is chosen
so that the nominal threshold value is 1.75V. The flash calibration is redone after any reset, and
the Flash Calibration Done bit in SM33 (SM33.FCD) is set before program execution starts in the
CPU.
Although it is not recommended to override default factory settings, it is still possible to override
the default value by writing to SM33.CALIB
14.5.10 Temperature Sensor
Rev: 1.0.0.0
The Temperature Sensor is connected to an ADC channel, please refer to the ADC chapter for
details. It is enabled by writing one to the Enable bit (EN) in the Temperature Sensor Configuration
Register (TSENS). The Temperature Sensor can not be calibrated.
Please refer to the Electrical Characteristics chapter for more details.
14.5.11 120MHz RC Oscillator (RC120M)
Rev: 1.1.0.0
The 120MHz RC Oscillator can be used as source for the main clock in the device, as described
in the Power Manager chapter. The oscillator can also be used as source for the generic clocks,
as described in Generic Clock section. The RC120M must be enabled before it is used as a
source clock. To enable the clock, the user must write a one to the Enable bit in the 120MHz RC
Oscillator Control Register (RC120MCR.EN), and read back the RC120MCR register until the
EN bit reads one. The clock is disabled by writing a zero to RC120MCR.EN. The EN bit must be
read back as zero before the RC120M is re-enabled. If not, undefined behavior may occur.
The oscillator is automatically disabled in certain sleep modes to reduce power consumption, as
described in the Power Manager chapter.
14.5.12 Backup Registers (BR)
Rev: 1.0.0.1
Four 32-bit backup registers are available to store values when the device is in Shutdown
mode. These registers will keep their content even when the VDDCORE supply and the internal
regulator supply voltage supplies are removed. The backup registers can be accessed by reading
from and writing to the BR0, BR1, BR2, and BR3 registers.
After writing to one of the backup registers the user must wait until the Backup Register Interface
Ready bit in tne Power and Clocks Status Register (PCLKSR.BRIFARDY) is set before writing to
another backup register. Writes to the backup register while PCLKSR.BRIFARDY is zero will be
discarded. An interrupt can be generated on a zero-to-one transition on PCLKSR.BRIFARDY if
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the BRIFARDY bit in the Interrupt Mask Register (IMR.BRIFARDY) is set. This bit is set by writing
a one to the corresponding bit in the Interrupt Enable Register (IER.BRIFARDY).
After powering up the device the Backup Register Interface Valid bit in PCLKSR (PCLKSR.BRIFAVALID)
is cleared, indicating that the content of the backup registers has not been written and
contains the reset value. After writing to one of the backup registers the PCLKSR.BRIFAVALID
bit is set. During writes to the backup registers (when BRIFARDY is zero) BRIFAVALID will be
zero. If a reset occurs when BRIFARDY is zero, BRIFAVALID will be cleared after the reset, indicating
that the content of the backup registers is not valid. If BRIFARDY is one when a reset
occurs, BRIFAVALID will be one and the content is the same as before the reset.
The user must ensure that BRIFAVALID and BRIFARDY are both set before reading the backup
register values.
14.5.13 32kHz RC Oscillator (RC32K)
Rev: 1.1.0.0
The RC32K can be used as source for the generic clocks, as described in The Generic Clocks
section.
The 32kHz RC oscillator (RC32K) is forced on after reset, and output on PA20. The clock is
available on the pad until the PPCR.FRC32 bit in the Power Manager has been cleared or a different
peripheral function has been chosen on PA20 (PA20 will start with peripheral function F
by default). Note that the forcing will only enable the clock output. To be able to use the RC32K
normally the oscillator must be enabled as described below.
The oscillator is enabled by writing a one to the Enable bit in the 32kHz RC Oscillator Configuration
Register (RC32KCR.EN) and disabled by writing a zero to RC32KCR.EN. The oscillator is
also automatically enabled when the sampling mode is requested for the SM33. In this case,
writing a zero to RC32KCR.EN will not disable the RC32K until the sampling mode is no longer
requested.
14.5.14 Generic Clock Prescalers
Rev: 1.0.0.0
The generic clocks can be sourced by two special prescalers to increase the generic clock frequency
precision.
These prescalers are named the High Resolution Prescaler (HRP) and the Fractional Prescaler
(FP).
14.5.14.1 High resolution prescaler
The HRP is a 24-bit counter that can generate a very accurate clock waveform. The clock
obtained has 50% duty cycle.
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Figure 14-7. High Resolution Prescaler Generation
The HRP is enabled by writing a one to the High Resolution Prescaler Enable (HRPEN) bit in the
High Resolution Prescaler Control Register (HRPCR).
The user can select a clock source for the HRP by writing to the Clock Selection (CKSEL) field of
the HRPCR register.
The user must configure the High Resolution Prescaler Clock (HRPCLK) frequency by writing to
the High Resolution Count (HRCOUNT) field of the High Resolution Counter (HRPCR) register.
This results in the output frequency:
fHRPCLK = fSRC / (2*(HRCOUNT+1))
The CKSEL field can not be changed dynamically but the HRCOUNT field can be changed onthe-fly.
14.5.14.2 Fractional prescaler
The FP generates a clock whose average frequency is more precise than the HRP. However,
this clock frequency is subject to jitter around the target clock frequency. This jitter influence can
be decreased by dividing this clock with the GCLK divider. Moreover the duty cycle of this clock
is not precisely 50%.
Figure 14-8. Fractional Prescaler Generation
The FP is enabled by writing a one to the FPEN bit in the Fractional Prescaler Control Register
(FPCR).
The user can select a clock source for the FP by writing to the CKSEL field of the FPCR register.
Divider
CKSEL
HRPCLK
HRCOUNT
Mask
HRPEN
Divider
CKSEL
FPCLK
FPDIV
Mask
FPMUL FPEN
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The user must configure the FP frequency by writing to the FPMUL and FPDIV fields of the
FPMUL and FPDIV registers. FPMUL and FPDIV must not be equal to zero and FPDIV must be
greater or equal to FPMUL. This results in the output frequency:
fFPCLK = fSRC * FPMUL/ (2*FPDIV)
The CKSEL field can not be changed dynamically but the FPMUL and FPDIV fields can be
changed on-the-fly.
• Jitter description
As described in Figure 14-9, the CLKFP half period lengths are integer multiples of the source
clock period but are not always equals. However the difference between the low level half period
length and the high level half period length is at the most one source clock period.
This induces when FPDIV is not an integer multiple of FPMUL a jitter on the FPCLK. The more
the FPCLK frequency is low, the more the jitter incidence is reduced.
Figure 14-9. Fractional Prescaler Jitter Examples
14.5.15 Generic Clocks
Rev: 1.1.0.0
Timers, communication modules, and other modules connected to external circuitry may require
specific clock frequencies to operate correctly. The SCIF defines a number of generic clocks that
can provide a wide range of accurate clock frequencies.
Each generic clock runs from either clock source listed in the “Generic Clock Sources” table in
the SCIF Module Configuration section. The selected source can optionally be divided by any
even integer up to 512. Each clock can be independently enabled and disabled, and is also
automatically disabled along with peripheral clocks by the Sleep Controller in the Power
Manager.
SRC clock
FPCLK
FMUL= 5
FDIV=5
FMUL=3
FDIV=10
FMUL=7
FDIV=9
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Figure 14-10. Generic Clock Generation
14.5.15.1 Enabling a generic clock
A generic clock is enabled by writing a one to the Clock Enable bit (CEN) in the Generic Clock
Control Register (GCCTRL). Each generic clock can individually select a clock source by writing
to the Oscillator Select field (OSCSEL). The source clock can optionally be divided by writing a
one to the Divide Enable bit (DIVEN) and the Division Factor field (DIV), resulting in the output
frequency:
where fSRC is the frequency of the selected source clock, and fGCLK is the output frequency of the
generic clock.
14.5.15.2 Disabling a generic clock
A generic clock is disabled by writing a zero to CEN or entering a sleep mode that disables the
PB clocks. In either case, the generic clock will be switched off on the first falling edge after the
disabling event, to ensure that no glitches occur. After CEN has been written to zero, the bit will
still read as one until the next falling edge occurs, and the clock is actually switched off. When
writing a zero to CEN the other bits in GCCTRL should not be changed until CEN reads as zero,
to avoid glitches on the generic clock. The generic clocks will be automatically re-enabled when
waking from sleep.
14.5.15.3 Changing clock frequency
When changing the generic clock frequency by changing OSCSEL or DIV, the clock should be
disabled before being re-enabled with the new clock source or division setting. This prevents
glitches during the transition.
14.5.15.4 Generic clock allocation
The generic clocks are allocated to different functions as shown in the “Generic Clock Allocation”
table in the SCIF Module Configuration section.
14.5.16 Interrupts
The SCIF has the following interrupt sources:
• AE - Access Error:
– A protected SCIF register was accessed without first being correctly unlocked.
Divider
OSCSEL
Generic Clock
DIV
0
1
DIVEN
Mask
CEN
Sleep Controller
fSRC fGCLK
Generic
Clock
Sources
f
GCLK
f
SRC
2 DIV + 1 = ----------------------------
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• PLLLOCK - PLL Lock
– A 0 to 1 transition on the PCLKSR.PLLLOCK bit is detected.
• PLLLOCKLOST - PLL Lock Lost
– A to 1 transition on the PCLKSR.PLLLOCKLOST bit is detected.
• BRIFARDY - Backup Register Interface Ready.
– A 0 to 1 transition on the PCLKSR.BRIFARDY bit is detected.
• DFLL0RCS - DFLL Reference Clock Stopped:
– A 0 to 1 transition on the PCLKSR.DFLLRCS bit is detected.
• DFLL0RDY - DFLL Ready:
– A 0 to 1 transition on the PCLKSR.DFLLRDY bit is detected.
• DFLL0LOCKLOSTA - DFLL lock lost on Accurate value:
– A 0 to 1 transition on the PCLKSR.DFLLLOCKLOSTA bit is detected.
• DFLL0LOCKLOSTF - DFLL lock lost on Fine value:
– A 0 to 1 transition on the PCLKSR.DFLLLOCKLOSTF bit is detected.
• DFLL0LOCKLOSTC - DFLL lock lost on Coarse value:
– A 0 to 1 transition on the PCLKSR.DFLLLOCKLOSTC bit is detected.
• DFLL0LOCKA - DFLL Locked on Accurate value:
– A 0 to 1 transition on the PCLKSR.DFLLLOCKA bit is detected.
• DFLL0LOCKF - DFLL Locked on Fine value:
– A 0 to 1 transition on the PCLKSR.DFLLLOCKF bit is detected.
• DFLL0LOCKC - DFLL Locked on Coarse value:
– A 0 to 1 transition on the PCLKSR.DFLLLOCKC bit is detected.
• BODDET - Brown out detection:
– A 0 to 1 transition on the PCLKSR.BODDET bit is detected.
• SM33DET - Supply Monitor 3.3V Detector:
– A 0 to 1 transition on the PCLKSR.SM33DET bit is detected.
• VREGOK - Voltage Regulator OK:
– A 0 to 1 transition on the PCLKSR.VREGOK bit is detected.
• OSC0RDY - Oscillator Ready:
– A 0 to 1 transition on the PCLKSR.OSC0RDY bit is detected.
• OSC32RDY - 32KHz Oscillator Ready:
– A 0 to 1 transition on the PCLKSR.OSC32RDY bit is detected.
The interrupt sources will generate an interrupt request if the corresponding bit in the Interrupt
Mask Register is set. The interrupt sources are ORed together to form one interrupt request. The
SCIF will generate an interrupt request if at least one of the bits in the Interrupt Mask Register
(IMR) is set. Bits in IMR are set by writing a one to the corresponding bit in the Interrupt Enable
Register (IER), and cleared by writing a one to the corresponding bit in the Interrupt Disable
Register (IDR). The interrupt request remains active until the corresponding bit in the Interrupt
Status Register (ISR) is cleared by writing a one to the corresponding bit in the Interrupt Clear
Register (ICR). Because all the interrupt sources are ORed together, the interrupt request from
the SCIF will remain active until all the bits in ISR are cleared.
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14.6 User Interface
Table 14-2. SCIF Register Memory Map
Offset Register Register Name Access Reset
0x0000 Interrupt Enable Register IER Write-only 0x00000000
0x0004 Interrupt Disable Register IDR Write-only 0x00000000
0x0008 Interrupt Mask Register IMR Read-only 0x00000000
0x000C Interrupt Status Register ISR Read-only 0x00000000
0x0010 Interrupt Clear Register ICR Write-only 0x00000000
0x0014 Power and Clocks Status Register PCLKSR Read-only 0x00000000
0x0018 Unlock Register UNLOCK Write-only 0x00000000
0x001C Oscillator 0 Control Register OSCCTRL0 Read/Write 0x00000000
0x0020 Oscillator 32 Control Register OSCCTRL32 Read/Write 0x00000004
0x0024 DFLL Config Register DFLL0CONF Read/Write 0x00000000
0x0028 DFLL Multiplier Register DFLL0MUL Write-only 0x00000000
0x002C DFLL Step Register DFLL0STEP Write-only 0x00000000
0x0030 DFLL Spread Spectrum Generator Control
Register DFLL0SSG Write-only 0x00000000
0x0034 DFLL Ratio Register DFLL0RATIO Read-only 0x00000000
0x0038 DFLL Synchronization Register DFLL0SYNC Write-only 0x00000000
0x003C BOD Level Register BOD Read/Write -(2)
0x0044 Voltage Regulator Calibration Register VREGCR Read/Write -(2)
0x0048 System RC Oscillator Calibration Register RCCR Read/Write -(2)
0x004C Supply Monitor 33 Calibration Register SM33 Read/Write -(2)
0x0050 Temperature Sensor Calibration Register TSENS Read/Write 0x00000000
0x0058 120MHz RC Oscillator Control Register RC120MCR Read/Write 0x00000000
0x005C-0x0068 Backup Registers BR Read/Write 0x00000000
0x006C 32kHz RC Oscillator Control Register RC32KCR Read/Write 0x00000000
0x0070 Generic Clock Control0 GCCTRL0 Read/Write 0x00000000
0x0074 Generic Clock Control1 GCCTRL1 Read/Write 0x00000000
0x0078 Generic Clock Control2 GCCTRL2 Read/Write 0x00000000
0x007C Generic Clock Control3 GCCTRL3 Read/Write 0x00000000
0x0080 Generic Clock Control4 GCCTRL4 Read/Write 0x00000000
0x0084 Generic Clock Control5 GCCTRL5 Read/Write 0x00000000
0x0088 Generic Clock Control6 GCCTRL6 Read/Write 0x00000000
0x008C Generic Clock Control7 GCCTRL7 Read/Write 0x00000000
0x0090 Generic Clock Control8 GCCTRL8 Read/Write 0x00000000
0x0094 Generic Clock Control9 GCCTRL9 Read/Write 0x00000000
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Note: 1. The reset value is device specific. Please refer to the Module Configuration section at the end of this chapter.
2. The reset value of this register depends on factory calibration.
0x0098 PLL0 Control Register PLL0 Read/Write 0x00000000
0x009C High Resolution Prescaler Control Register HRPCR Read/Write 0x00000000
0x00A0 Fractional Prescaler Control Register FPCR Read/Write 0x00000000
0x00A4 Fractional Prescaler Multiplier Register FPMUL Read/Write 0x00000000
0x00A8 Fractional Prescaler DIVIDER Register FPDIV Read/Write 0x00000000
0x03BC Commonly used Modules Version Register CMVERSION Read-only -(1)
0x03C0 Generic Clock Prescaler Version Register GCLKPRESCVERSION Read-only -(1)
0x03C4 PLL Version Register PLLVERSION Read-only -(1)
0x03C8 Oscillator0 Version Register OSC0VERSION Read-only -(1)
0x03CC 32 KHz Oscillator Version Register OSC32VERSION Read-only -(1)
0x03D0 DFLL Version Register DFLLIFVERSION Read-only -(1)
0x03D4 BOD Version Register BODIFAVERSION Read-only -(1)
0x03D8 Voltage Regulator Version Register VREGIFBVERSION Read-only -(1)
0x03DC System RC Oscillator Version Register RCOSCIFAVERSION Read-only -(1)
0x03E0 3.3V Supply Monitor Version Register SM33IFAVERSION Read-only -(1)
0x03E4 Temperature Sensor Version Register TSENSIFAVERSION Read-only -(1)
0x03EC 120MHz RC Oscillator Version Register RC120MIFAVERSION Read-only -(1)
0x03F0 Backup Register Interface Version Register BRIFAVERSION Read-only -(1)
0x03F4 32kHz RC Oscillator Version Register RC32KIFAVERSION Read-only -(1)
0x03F8 Generic Clock Version Register GCLKVERSION Read-only -(1)
0x03FC SCIF Version Register VERSION Read-only -(1)
Table 14-2. SCIF Register Memory Map
Offset Register Register Name Access Reset
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14.6.1 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x0000
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
----- PLLLOCKLO
ST0 PLLLOCK0 BRIFARDY
15 14 13 12 11 10 9 8
DFLL0RCS DFLL0RDY DFLL0LOCK
LOSTA
DFLL0LOCK
LOSTF
DFLL0LOCK
LOSTC
DFLL0LOCK
A
DFLL0LOCK
F
DFLL0LOCK
C
76543210
BODDET SM33DET VREGOK - - - OSC0RDY OSC32RDY
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14.6.2 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x0004
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
----- PLLLOCKLO
ST0 PLLLOCK0 BRIFARDY
15 14 13 12 11 10 9 8
DFLL0RCS DFLL0RDY DFLL0LOCK
LOSTA
DFLL0LOCK
LOSTF
DFLL0LOCK
LOSTC
DFLL0LOCK
A
DFLL0LOCK
F
DFLL0LOCK
C
76543210
BODDET SM33DET VREGOK - - - OSC0RDY OSC32RDY
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14.6.3 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x0008
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
----- PLLLOCKLO
ST0 PLLLOCK0 BRIFARDY
15 14 13 12 11 10 9 8
DFLL0RCS DFLL0RDY DFLL0LOCK
LOSTA
DFLL0LOCK
LOSTF
DFLL0LOCK
LOSTC
DFLL0LOCK
A
DFLL0LOCK
F
DFLL0LOCK
C
76543210
BODDET SM33DET VREGOK - - - OSC0RDY OSC32RDY
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14.6.4 Interrupt Status Register
Name: ISR
Access Type: Read-only
Offset: 0x000C
Reset Value: 0x00000000
0: The corresponding interrupt is cleared.
1: The corresponding interrupt is pending.
A bit in this register is cleared when the corresponding bit in ICR is written to one.
A bit in this register is set when the corresponding interrupt occurs.
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
----- PLLLOCKLO
ST0 PLLLOCK0 BRIFARDY
15 14 13 12 11 10 9 8
DFLL0RCS DFLL0RDY DFLL0LOCK
LOSTA
DFLL0LOCK
LOSTF
DFLL0LOCK
LOSTC
DFLL0LOCK
A
DFLL0LOCK
F
DFLL0LOCK
C
76543210
BODDET SM33DET VREGOK - - - OSC0RDY OSC32RDY
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14.6.5 Interrupt Clear Register
Name: ICR
Access Type: Write-only
Offset: 0x0010
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in ISR.
31 30 29 28 27 26 25 24
AE - - - - - - -
23 22 21 20 19 18 17 16
----- PLLLOCKLO
ST0 PLLLOCK0 BRIFARDY
15 14 13 12 11 10 9 8
DFLL0RCS DFLL0RDY DFLL0LOCK
LOSTA
DFLL0LOCK
LOSTF
DFLL0LOCK
LOSTC
DFLL0LOCK
A
DFLL0LOCK
F
DFLL0LOCK
C
76543210
BODDET SM33DET VREGOK - - - OSC0RDY OSC32RDY
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14.6.6 Power and Clocks Status Register
Name: PCLKSR
Access Type: Read-only
Offset: 0x0014
Reset Value: 0x00000000
• BRIFAVALID: Backup Register Interface Valid
0: The values in the backup registers are not valid.
1: The values in the backup registers are valid.
• PLLL0LOCKLOST: PLL0 lock lost value
0: PLL0 has not lost it’s lock or has never been enabled.
1: PLL0 has lost it’s lock, either by disabling the PLL0 or due to faulty operation.
• PLL0LOCK: PLL0 Locked on Accurate value
0: PLL0 is unlocked on accurate value.
1: PLL0 is locked on accurate value, and is ready to be selected as clock source with an accurate output clock.
• BRIFARDY: Backup Register Interface Ready
0: The backup register interface is busy updating the backup registers. Writes to BRn will be discarded.
1: The backup register interface is ready to accept new writes to the backup registers.
• DFLL0RCS: DFLL0 Reference Clock Stopped
0: The DFLL reference clock is running, or has never been enabled.
1: The DFLL reference clock has stopped or is too slow.
• DFLL0RDY: DFLL0 Synchronization Ready
0: Read or write to DFLL registers is invalid
1: Read or write to DFLL registers is valid
• DFLL0LOCKLOSTA: DFLL0 Lock Lost on Accurate Value
0: DFLL has not lost its Accurate lock or has never been enabled.
1: DFLL has lost its Accurate lock, either by disabling the DFLL or due to faulty operation.
• DFLL0LOCKLOSTF: DFLL0 Lock Lost on Fine Value
0: DFLL has not lost its Fine lock or has never been enabled.
1: DFLL has lost its Fine lock, either by disabling the DFLL or due to faulty operation.
31 30 29 28 27 26 25 24
- BRIFAVALID - - - - - -
23 22 21 20 19 18 17 16
----- PLLLOCKLO
ST0 PLLLOCK0 BRIFARDY
15 14 13 12 11 10 9 8
DFLL0RCS DFLL0RDY DFLL0LOCK
LOSTA
DFLL0LOCK
LOSTF
DFLL0LOCK
LOSTC
DFLL0LOCK
A
DFLL0LOCK
F
DFLL0LOCK
C
76543210
BODDET SM33DET VREGOK - - - OSC0RDY OSC32RDY
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• DFLL0LOCKLOSTC: DFLL0 Lock Lost on Coarse Value
0: DFLL has not lost its Coarse lock or has never been enabled.
1: DFLL has lost its Coarse lock, either by disabling the DFLL or due to faulty operation.
• DFLL0LOCKA: DFLL0 Locked on Accurate Value
0: DFLL is unlocked on Accurate value.
1: DFLL is locked on Accurate value, and is ready to be selected as clock source with an accurate output clock.
• DFLL0LOCKF: DFLL0 Locked on Fine Value
0: DFLL is unlocked on Fine value.
1: DFLL is locked on Fine value, and is ready to be selected as clock source with a high accuracy on the output clock.
• DFLL0LOCKC: DFLL0 Locked on Coarse Value
0: DFLL is unlocked on Coarse value.
1: DFLL is locked on Coarse value, and is ready to be selected as clock source with medium accuracy on the output clock.
• BODDET: Brown-Out Detection
0: No BOD Event.
1: BOD has detected that the supply voltage is below the BOD reference value.
• SM33DET: Supply Monitor 3.3V Detector
0: SM33 not enabled or the supply voltage is above the SM33 threshold.
1: SM33 enabled and the supply voltage is below the SM33 threshold.
• VREGOK: Voltage Regulator OK
0: Voltage regulator not enabled or not ready.
1: Voltage regulator has reached its output threshold value after being enabled.
• OSC0RDY: OSC0 Ready
0: Oscillator not enabled or not ready.
1: Oscillator is stable and ready to be used as clock source.
• OSC32RDY: 32 KHz oscillator Ready
0: OSC32K not enabled or not ready.
1: OSC32K is stable and ready to be used as clock source.
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14.6.7 Unlock Register
Name: UNLOCK
Access Type: Write-only
Offset: 0x0018
Reset Value: 0x00000000
To unlock a write protected register, first write to the UNLOCK register with the address of the register to unlock in the ADDR
field and 0xAA in the KEY field. Then, in the next PB access write to the register specified in the ADDR field.
The LOCK is by default off. To turn on the LOCK, first write 0xAA to the KEY field and UNLOCK address offset to the ADDR field
in the UNLOCK register, followed by writing 0x5A5A5A5A to the UNLOCK register. To turn off the LOCK, first write 0xAA to the
KEY field and UNLOCK address offset to the ADDR field in the UNLOCK register, followed by writing 0xA5AA5A55 to the
UNLOCK register.
• KEY: Unlock Key
Write this bit field to 0xAA to enable unlock.
• ADDR: Unlock Address
Write the address offset of the register to unlock to this field.
31 30 29 28 27 26 25 24
KEY
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - - ADDR[9:8]
76543210
ADDR[7:0]
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14.6.8 Oscillator Control Register
Name: OSCCTRLn
Access Type: Read/Write
Reset Value: 0x00000000
• OSCEN: Oscillator Enable
0: The oscillator is disabled.
1: The oscillator is enabled.
• STARTUP: Oscillator Start-up Time
Select start-up time for the oscillator. Please refer to the “Oscillator Startup Time” table in the SCIF Module Configuration
section for details.
• AGC: Automatic Gain Control
For test purposes.
• GAIN: Gain
Selects the gain for the oscillator. Please refer to the “Oscillator Gain Settings” table in the SCIF Module Configuration section
for details.
• MODE: Oscillator Mode
0: External clock connected on XIN. XOUT can be used as general-purpose I/O (no crystal).
1: Crystal is connected to XIN/XOUT.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - - - - OSCEN
15 14 13 12 11 10 9 8
- - - - STARTUP[3:0]
76543210
- - - - AGC GAIN[1:0] MODE
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14.6.9 32KHz Oscillator Control Register
Name: OSCCTRL32
Access Type: Read/Write
Reset Value: 0x00000004
Note: This register is only reset by Power-On Reset
• RESERVED
This bit must always be written to zero.
• STARTUP: Oscillator Start-up Time
Select start-up time for 32 KHz oscillator
31 30 29 28 27 26 25 24
RESERVED -------
23 22 21 20 19 18 17 16
- - - - - STARTUP[2:0]
15 14 13 12 11 10 9 8
- - - - - MODE[2:0]
76543210
- - - - EN1K EN32K PINSEL OSC32EN
Table 14-3. Start-up Time for 32 KHz Oscillator
STARTUP
Number of RCSYS Clock
Cycle
Approximative Equivalent Time
(RCOSC = 115 kHz)
00 0
1 128 1.1 ms
2 8192 72.3 ms
3 16384 143 ms
4 65536 570 ms
5 131072 1.1 s
6 262144 2.3 s
7 524288 4.6 s
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• MODE: Oscillator Mode
• EN1K: 1 KHz output Enable
0: The 1 KHz output is disabled.
1: The 1 KHz output is enabled.
• EN32K: 32 KHz output Enable
0: The 32 KHz output is disabled.
1: The 32 KHz output is enabled.
• PINSEL: Pins Select
0: Default pins used.
1: Alternate pins: XIN32_2 pin is used instead of XIN32 pin, XOUT32_2 pin is used instead of XOUT32.
• OSC32EN: 32 KHz Oscillator Enable
0: The 32 KHz Oscillator is disabled
1: The 32 KHz Oscillator is enabled
Table 14-4. Operation Mode for 32 KHz Oscillator
MODE Description
0 External clock connected to XIN32, XOUT32 can be used as general-purpose I/O (no crystal)
1 Crystal mode. Crystal is connected to XIN32/XOUT32.
2 Reserved
3 Reserved
4 Crystal and high current mode. Crystal is connected to XIN32/XOUT32.
5 Reserved
6 Reserved
7 Reserved
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14.6.10 DFLLn Configuration Register
Name: DFLLnCONF
Access Type: Read/Write
Reset Value: 0x00000000
• COARSE: Coarse Calibration Value
Set the value of the coarse calibration register. If in closed loop mode, this field is Read-only.
• FINE: FINE Calibration Value
Set the value of the fine calibration register. If in closed loop mode, this field is Read-only.
• QLEN: Quick Lock Enable
0: Quick Lock is disabled.
1: Quick Lock is enabled.
• CCEN: Chill Cycle Enable
0: Chill Cycle is disabled.
1: Chill Cycle is enabled.
• LLAW: Lose Lock After Wake
0: Locks will not be lost after waking up from sleep modes.
1: Locks will be lost after waking up from sleep modes where the DFLL clock has been stopped.
• DITHER: Enable Dithering
0: The fine LSB input to the VCO is constant.
1: The fine LSB input to the VCO is dithered to achieve sub-LSB approximation to the correct multiplication ratio.
• MODE: Mode Selection
0: The DFLL is in open loop operation.
1: The DFLL is in closed loop operation.
• EN: Enable
0: The DFLL is disabled.
1: The DFLL is enabled.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
COARSE[7:0]
23 22 21 20 19 18 17 16
- - - - - - - FINE[8]
15 14 13 12 11 10 9 8
FINE[7:0]
76543210
- QLEN CCEN - LLAW DITHER MODE EN
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14.6.11 DFLLn Multiplier Register
Name: DFLLnMUL
Access Type: Read/Write
Reset Value: 0x00000000
• IMUL: Integer Multiply Factor
This field, together with FMUL, determines the ratio between fDFLL and fREFthe DFLL. IMUL is the integer part, while the FMUL is
the fractional part.
In open loop mode, writing to this register has no effect.
• FMUL: Fractional Multiply Factor
This field, together with IMUL, determines the ratio between fDFLL and fREFthe DFLL. IMUL is the integer part, while the FMUL is
the fractional part.
In open loop mode, writing to this register has no effect.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
IMUL[15:8]
23 22 21 20 19 18 17 16
IMUL[7:0]
15 14 13 12 11 10 9 8
FMUL[15:8]
76543210
FMUL[7:0]
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14.6.12 DFLLn Maximum Step Register
Name: DFLLnSTEP
Access Type: Read/Write
Reset Value: 0x00000000
• FSTEP: Fine Maximum Step
This indicates the maximum step size during fine adjustment in closed-loop mode. When adjusting to a new frequency, the
expected overshoot of that frequency depends on this step size.
• CSTEP: Coarse Maximum Step
This indicates the maximum step size during coarse adjustment in closed-loop mode. When adjusting to a new frequency, the
expected overshoot of that frequency depends on this step size.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
- - - - - - - FSTEP[8]
23 22 21 20 19 18 17 16
FSTEP[7:0]
15 14 13 12 11 10 9 8
--------
76543210
CSTEP[7:0]
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14.6.13 DFLLn Spread Spectrum Generator Control Register
Name: DFLLnSSG
Access Type: Read/Write
Reset Value: 0x00000000
• STEPSIZE: SSG Step Size
Sets the step size of the spread spectrum.
• AMPLITUDE: SSG Amplitude
Sets the amplitude of the spread spectrum.
• PRBS: Pseudo Random Bit Sequence
0: Each spread spectrum frequency is applied at constant intervals
1: Each spread spectrum frequency is applied at pseudo-random intervals
• EN: Enable
0: SSG is disabled.
1: SSG is enabled.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
- -------
23 22 21 20 19 18 17 16
- - - STEPSIZE[4:0]
15 14 13 12 11 10 9 8
- - - AMPLITUDE[4:0]
76543210
- - - - - - PRBS EN
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14.6.14 DFLLn Ratio Register
Name: DFLLnRATIO
Access Type: Read-only
Reset Value: 0x00000000
• RATIODIFF: Multiplication Ratio Difference
In closed-loop mode, this field indicates the error in the ratio between the VCO frequency and the target frequency.
• NUMREF: Numerical Reference
The number of reference clock cycles used to measure the VCO frequency equals 2^NUMREF.
31 30 29 28 27 26 25 24
RATIODIFF[15:8]
23 22 21 20 19 18 17 16
RATIODIFF[7:0]
15 14 13 12 11 10 9 8
- -------
76543210
- - - NUMREF[4:0]
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14.6.15 DFLLn Synchronization Register
Name: DFLLnSYNC
Access Type: Write-only
Reset Value: 0x00000000
• SYNC: Synchronization
To be able to read the current value of DFLLnCONF or DFLLnRATIO in closed-loop mode, this bit should be written to one. The
updated value is available in DFLLnCONF and DFLLnRATIO when PCLKSR.DFLLnRDY is set.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - - - SYNC
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14.6.16 BOD Control Register
Name: BOD
Access Type: Read/Write
Reset Value: -
• SFV: Store Final Value
0: The register is read/write
1: The register is read-only, to protect against further accidental writes.
This bit is cleared after any reset except for a BOD reset, and during flash calibration.
• FCD: Fuse Calibration Done
0: The flash calibration will be redone after any reset.
1: The flash calibration will be redone after any reset except for a BOD reset.
This bit is cleared after any reset, except for a BOD reset.
This bit is set when the CTRL, HYST and LEVEL fields have been updated by the flash fuses after a reset.
• CTRL: BOD Control
• HYST: BOD Hysteresis
0: No hysteresis.
1: Hysteresis on.
• LEVEL: BOD Level
This field sets the triggering threshold of the BOD. See Electrical Characteristics for actual voltage levels.
Note that any change to the LEVEL field of the BOD register should be done with the BOD deactivated to avoid spurious reset
or interrupt.
31 30 29 28 27 26 25 24
SFV - - - - - - -
23 22 21 20 19 18 17 16
- - - - - - - FCD
15 14 13 12 11 10 9 8
- - - - - - CTRL
76543210
- HYST LEVEL
Table 14-5. Operation Mode for BOD
CTRL Description
0 BOD is disabled.
1 BOD is enabled and can reset the device. An interrupt request will be generated, if enabled in the IMR
register.
2 BOD is enabled but cannot reset the device. An interrupt request will be generated, if enabled in the IMR
register.
3 Reserved.
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Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
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14.6.17 Voltage Regulator Calibration Register
Name: VREGCR
Access Type: Read/Write
Reset Value: -
• SFV: Store Final Value
0: The register is read/write.
1: The register is read-only, to protect against further accidental writes.
This bit is cleared by a Power-on Reset.
• INTPD: Internal Pull-down
This bit is used for test purposes only.
0: The voltage regulator output is not pulled to ground.
1: The voltage regulator output has a pull-down to ground.
• POR18VALUE: Power-on Reset 1.8V Output Value
0: VDDCORE voltage is below the POR18 power-on threshold level.
1: VDDCORE voltage is above the POR18 power-on threshold level.
This bit is read-only. Writing to this bit has no effect.
• POR33VALUE: Power-on Reset 3.3V Output Value
0: Internal regulator supply voltage is below the POR33 power-on threshold level.
1: Internal regulator supply voltage is above the POR33 power-on threshold level.
This bit is read-only. Writing to this bit has no effect.
• POR18MASK: Power-on Reset 1.8V Output Mask
0: Power-on Reset is not masked.
1: Power-on Reset is masked.
• POR18STATUS: Power-on Reset 1.8V Status
0: Power-on Reset is disabled.
1: Power-on Reset is enabled.
This bit is read-only. Writing to this bit has no effect.
• POR18EN: Power-on Reset 1.8V Enable
Writing a zero to this bit disables the POR18 detector.
Writing a one to this bit enables the POR18 detector.
• POR33MASK: Power-on Reset 3.3V Output Mask
0: Power-on Reset 3.3V is not masked.
31 30 29 28 27 26 25 24
SFV INTPD - - - DBG- POR18VALUE POR33VALUE
23 22 21 20 19 18 17 16
POR18MASK POR18STAT
US POR18EN POR33MASK POR33STAT
US POR33EN DEEPDIS FCD
15 14 13 12 11 10 9 8
- - - - CALIB
76543210
ON VREGOK EN - - SELVDD
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1: Power-on Reset 3.3V is masked.
• POR33STATUS: Power-on Reset 3.3V Status
0: Power-on Reset is disabled.
1: Power-on Reset is enabled.
This bit is read-only. Writing to this bit has no effect.
• POR33EN: Power-on Reset 3.3V Enable
0: Writing a zero to this bit disables the POR33 detector.
1: Writing a one to this bit enables the POR33 detector.
• DEEPDIS: Disable Regulator Deep Mode
0: Regulator will enter deep mode in low-power sleep modes for lower power consumption.
1: Regulator will stay in full-power mode in all sleep modes for shorter start-up time.
• FCD: Flash Calibration Done
0: The flash calibration will be redone after any reset.
1: The flash calibration will only be redone after a Power-on Reset.
This bit is cleared after a Power-on Reset.
This bit is set when the CALIB field has been updated by flash calibration after a reset.
• CALIB: Calibration Value
Calibration value for Voltage Regulator. This is calibrated during production and should not be changed.
• ON: Voltage Regulator On Status
0: The voltage regulator is currently disabled.
1: The voltage regulator is currently enabled.
This bit is read-only. Writing to this bit has no effect.
• VREGOK: Voltage Regulator OK Status
0: The voltage regulator is disabled or has not yet reached a stable output voltage.
1: The voltage regulator has reached the output voltage threshold level after being enabled.
This bit is read-only. Writing to this bit has no effect.
• EN: Enable
0: The voltage regulator is disabled.
1: The voltage regulator is enabled.
Note: This bit is set after a Power-on Reset (POR).
• SELVDD: Select VDD
Output voltage of the Voltage Regulator. The default value of this bit corresponds to an output voltage of 1.8V.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
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14.6.18 System RC Oscillator Calibration Register
Name: RCCR
Access Type: Read/Write
Reset Value: -
• FCD: Flash Calibration Done
0: The flash calibration will be redone after any reset.
1: The flash calibration will only be redone after a Power-on Reset.
This bit is cleared after a POR.
This bit is set when the CALIB field has been updated by the flash fuses after a reset.
• CALIB: Calibration Value
Calibration Value for the System RC oscillator (RCSYS).
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - - - - FCD
15 14 13 12 11 10 9 8
- - - - - - CALIB[9:8]
76543210
CALIB[7:0]
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14.6.19 Supply Monitor 33 Calibration Register
Name: SM33
Access Type: Read/Write
Reset Value: -
• SAMPFREQ: Sampling Frequency
Selects the sampling mode frequency of the 3.3V supply monitor. In sampling mode, the SM33 performs a measurement every
2(SAMPFREQ+5) cycles of the internal 32kHz RC oscillator.
• ONSM: Supply Monitor On Indicator
0: The supply monitor is disabled.
1: The supply monitor is enabled.
This bit is read-only. Writing to this bit has no effect.
• SFV: Store Final Value
0: The register is read/write
1: The register is read-only, to protect against further accidental writes.
This bit is cleared after a reset.
• FCD: Flash Calibration Done
This bit is cleared after a reset.
This bit is set when CALIB field has been updated after a reset.
• CALIB: Calibration Value
Calibration Value for the SM33.
• FS: Force Sampling Mode
0: Sampling mode is enabled in DeepStop and Static mode only.
1: Sampling mode is always enabled.
• CTRL: Supply Monitor Control
31 30 29 28 27 26 25 24
- - - - SAMPFREQ
23 22 21 20 19 18 17 16
- - - - - ONSM SFV FCD
15 14 13 12 11 10 9 8
- - - - CALIB
76543210
FS - - - CTRL
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Selects the operating mode for the SM33.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
Table 14-6. Operation Mode for SM33
CTRL Description
0 SM33 is disabled.
1 SM33 is enabled and can reset the device. An interrupt request will be generated if the corresponding
interrupt is enabled in the IMR register.
2 SM33 is enabled and cannot reset the device. An interrupt request will be generated if the corresponding
interrupt is enabled in the IMR register.
3 SM33 is disabled
4-7 Reserved
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14.6.20 Temperature Sensor Configuration Register
Name: TSENS
Access Type: Read/Write
Reset Value: 0x00000000
• EN: Temperature Sensor Enable
0: The Temperature Sensor is disabled.
1: The Temperature Sensor is enabled.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - EN
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14.6.21 120MHz RC Oscillator Configuration Register
Name: RC120MCR
Access Type: Read/Write
Reset Value: 0x00000000
• EN: RC120M Enable
0: The 120 MHz RC oscillator is disabled.
1: The 120 MHz RC oscillator is enabled.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - - - EN
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14.6.22 Backup Register n
Name: BRn
Access Type: Read/Write
Reset Value: 0x00000000
This is a set of general-purpose read/write registers. Data stored in these registers is retained when the device is in Shutdown.
Before writing to these registers the user must ensure that PCLKSR.BRIFARDY is not set.
Note that this registers are protected by a lock. To write to these registers the UNLOCK register has to be written first.
Please refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
DATA[31:24]
23 22 21 20 19 18 17 16
DATA[23:16]
15 14 13 12 11 10 9 8
DATA[15:8]
76543210
DATA[7:0]
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14.6.23 32kHz RC Oscillator Configuration Register
Name: RC32KCR
Access Type: Read/Write
Reset Value: 0x00000000
• EN: RC32K Enable
0: The 32 kHz RC oscillator is disabled.
1: The 32 kHz RC oscillator is enabled.
Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Please
refer to the UNLOCK register description for details.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - - - EN
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14.6.24 Generic Clock Control
Name: GCCTRL
Access Type: Read/Write
Reset Value: 0x00000000
There is one GCCTRL register per generic clock in the design.
• DIV: Division Factor
The number of DIV bits for each generic clock is as shown in the “Generic Clock number of DIV bits” table in the SCIF Module
Configuration section.
• OSCSEL: Oscillator Select
Selects the source clock for the generic clock. Please refer to the “Generic Clock Sources” table in the SCIF Module
Configuration section.
• DIVEN: Divide Enable
0: The generic clock equals the undivided source clock.
1: The generic clock equals the source clock divided by 2*(DIV+1).
• CEN: Clock Enable
0: The generic clock is disabled.
1: The generic clock is enabled.
31 30 29 28 27 26 25 24
DIV[15:8]
23 22 21 20 19 18 17 16
DIV[7:0]
15 14 13 12 11 10 9 8
- - - OSCSEL[4:0]
76543210
- - - - - - DIVEN CEN
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14.6.25 PLL Control Register
Name: PLLn
Access Type: Read/Write
Reset Value: 0x00000000
• PLLCOUNT: PLL Count
Specifies the number of RCSYS clock cycles before ISR.PLLLOCKn will be set after PLLn has been written, or after PLLn has
been automatically re-enabled after exiting a sleep mode.
• PLLMUL: PLL Multiply Factor
• PLLDIV: PLL Division Factor
These fields determine the ratio of the PLL output frequency to the source oscillator frequency:
fvco = (PLLMUL+1)/PLLDIV • fREF if PLLDIV >0
fvco = 2•(PLLMUL+1) • fREF if PLLDIV = 0
Note that the PLLMUL field should always be greater than 1 or the behavior of the PLL will be undefined.
• PLLOPT: PLL Option
PLLOPT[0]: Selects the VCO frequency range (fvco).
0: 80MHz1
1
1
0
0
BaudRate SelectedClock
8 2 – OVER CD = -----------------------------------------------
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The baud rate is calculated with the following formula (OVER=0):
The baud rate error is calculated with the following formula. It is not recommended to work with
an error higher than 5%.
20.6.1.3 Fractional Baud Rate in Asynchronous Mode
The baud rate generator has a limitation: the source frequency is always a multiple of the baud
rate. An approach to this problem is to integrate a high resolution fractional N clock generator,
outputting fractional multiples of the reference source clock. This fractional part is selected with
the Fractional Part field (BRGR.FP), and is activated by giving it a non-zero value. The resolution
is one eighth of CD. The resulting baud rate is calculated using the following formula:
The modified architecture is presented below:
Table 20-3. Baud Rate Example (OVER=0)
Source Clock (Hz)
Expected Baud
Rate (bit/s) Calculation Result CD Actual Baud Rate (bit/s) Error
3 686 400 38 400 6.00 6 38 400.00 0.00%
4 915 200 38 400 8.00 8 38 400.00 0.00%
5 000 000 38 400 8.14 8 39 062.50 1.70%
7 372 800 38 400 12.00 12 38 400.00 0.00%
8 000 000 38 400 13.02 13 38 461.54 0.16%
12 000 000 38 400 19.53 20 37 500.00 2.40%
12 288 000 38 400 20.00 20 38 400.00 0.00%
14 318 180 38 400 23.30 23 38 908.10 1.31%
14 745 600 38 400 24.00 24 38 400.00 0.00%
18 432 000 38 400 30.00 30 38 400.00 0.00%
24 000 000 38 400 39.06 39 38 461.54 0.16%
24 576 000 38 400 40.00 40 38 400.00 0.00%
25 000 000 38 400 40.69 40 38 109.76 0.76%
32 000 000 38 400 52.08 52 38 461.54 0.16%
32 768 000 38 400 53.33 53 38 641.51 0.63%
33 000 000 38 400 53.71 54 38 194.44 0.54%
40 000 000 38 400 65.10 65 38 461.54 0.16%
50 000 000 38 400 81.38 81 38 580.25 0.47%
60 000 000 38 400 97.66 98 38 265.31 0.35%
BaudRate CLKUSART = CD 16
Error 1 ExpectedBaudRate
ActualBaudRate
-------------------------------------------------- = –
BaudRate SelectedClock
8 2 – OVER CD FP
8
+ -------
= --------------------------------------------------------------------
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Figure 20-3. Fractional Baud Rate Generator
20.6.1.4 Baud Rate in Synchronous and SPI Mode
If the USART is configured to operate in synchronous mode, the selected clock is divided by the
BRGR.CD field. This does not apply when CLK is selected.
When CLK is selected the external frequency must be at least 4.5 times lower than the system
clock, and when either CLK or CLK_USART/DIV are selected, CD must be even to ensure a
50/50 duty cycle. If CLK_USART is selected, the generator ensures this regardless of value.
20.6.2 Receiver and Transmitter Control
After a reset, the transceiver is disabled. The receiver/transmitter is enabled by writing a one to
either the Receiver Enable, or Transmitter Enable bit in the Control Register (CR.RXEN, or
CR.TXEN). They may be enabled together and can be configured both before and after they
have been enabled. The user can reset the USART receiver/transmitter at any time by writing a
one to either the Reset Receiver (CR.RSTRX), or Reset Transmitter (CR.RSTTX) bit. This software
reset clears status bits and resets internal state machines, immediately halting any
communication. The user interface configuration registers will retain their values.
The user can disable the receiver/transmitter by writing a one to either the Receiver Disable, or
Transmitter Disable bit (CR.RXDIS, or CR.TXDIS). If the receiver is disabled during a character
reception, the USART will wait for the current character to be received before disabling. If the
transmitter is disabled during transmission, the USART will wait until both the current character
and the character stored in the Transmitter Holding Register (THR) are transmitted before disabling.
If a timeguard has been implemented it will remain functional during the transaction.
USCLKS CD Modulus
Control
FP
FP
CD
glitch-free
logic
16-bit Counter
OVER
FIDI
SYNC
Sampling
Divider
CLK_USART
CLK_USART/DIV
Reserved CLK
CLK
BaudRate
Clock
Sampling
Clock
SYNC
USCLKS = 3
>1
1
2
3
0
0
1
0
1
1
0
0
BaudRate SelectedClock
CD = -------------------------------------
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20.6.3 Synchronous and Asynchronous Modes
20.6.3.1 Transmitter Operations
The transmitter performs equally in both synchronous and asynchronous operating modes
(MR.SYNC). One start bit, up to 9 data bits, an optional parity bit, and up to two stop bits are
successively shifted out on the TXD pin at each falling edge of the serial clock. The number of
data bits is selected by the Character Length field (MR.CHRL) and the MR.MODE9 bit. Nine bits
are selected by writing a one to MODE9, overriding any value in CHRL. The parity bit configuration
is selected in the MR.PAR field. The Most Significant Bit First bit (MR.MSBF) selects which
data bit to send first. The number of stop bits is selected by the MR.NBSTOP field. The 1.5 stop
bit configuration is only supported in asynchronous mode.
Figure 20-4. Character Transmit
The characters are sent by writing to the Character to be Transmitted field (THR.TXCHR). The
transmitter reports status with the Transmitter Ready (TXRDY) and Transmitter Empty
(TXEMPTY) bits in the Channel Status Register (CSR). TXRDY is set when THR is empty.
TXEMPTY is set when both THR and the transmit shift register are empty (transmission complete).
Both TXRDY and TXEMPTY are cleared when the transmitter is disabled. Writing a
character to THR while TXRDY is zero has no effect and the written character will be lost.
Figure 20-5. Transmitter Status
20.6.3.2 Asynchronous Receiver
If the USART is configured in an asynchronous operating mode (MR.SYNC = 0), the receiver will
oversample the RXD input line by either 8 or 16 times the baud rate clock, as selected by the
Oversampling Mode bit (MR.OVER). If the line is zero for half a bit period (four or eight consecutive
samples, respectively), a start bit will be assumed, and the following 8th or 16th sample will
determine the logical value on the line, in effect resulting in bit values being determined at the
middle of the bit period.
D0 D1 D2 D3 D4 D5 D6 D7
TXD
Start
Bit
Parity
Bit
Stop
Bit
Example: 8-bit, Parity Enabled One Stop
Baud Rate
Clock
D0 D1 D2 D3 D4 D5 D6 D7
TXD
Start
Bit
Parity
Bit
Stop
Bit
Baud Rate
Clock
Start
Bit
Write
THR
D0 D1 D2 D3 D4 D5 D6 D7 Parity
Bit
Stop
Bit
TXRDY
TXEMPTY
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The number of data bits, endianess, parity mode, and stop bits are selected by the same bits
and fields as for the transmitter (MR.CHRL, MODE9, MSBF, PAR, and NBSTOP). The synchronization
mechanism will only consider one stop bit, regardless of the used protocol, and when
the first stop bit has been sampled, the receiver will automatically begin looking for a new start
bit, enabling resynchronization even if there is a protocol miss-match. Figure 20-6 and Figure
20-7 illustrate start bit detection and character reception in asynchronous mode.
Figure 20-6. Asynchronous Start Bit Detection
Figure 20-7. Asynchronous Character Reception
20.6.3.3 Synchronous Receiver
In synchronous mode (SYNC=1), the receiver samples the RXD signal on each rising edge of
the Baud Rate Clock. If a low level is detected, it is considered as a start bit. Configuration bits
and fields are the same as in asynchronous mode.
Sampling
Clock (x16)
RXD
Start
Detection
Sampling
Baud Rate
Clock
RXD
Start
Rejection
Sampling
12345678
12345670 1234
12345678 9 10 11 12 13 14 15 16 D0
Sampling
D0 D1 D2 D3 D4 D5 D6 D7
RXD
Parity
Bit
Stop
Bit
Example: 8-bit, Parity Enabled
Baud Rate
Clock
Start
Detection
16
samples
16
samples
16
samples
16
samples
16
samples
16
samples
16
samples
16
samples
16
samples
16
samples
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Figure 20-8. Synchronous Mode Character Reception
20.6.3.4 Receiver Operations
When a character reception is completed, it is transferred to the Received Character field in the
Receive Holding Register (RHR.RXCHR), and the Receiver Ready bit in the Channel Status
Register (CSR.RXRDY) is set. If RXRDY is already set, RHR will be overwritten and the Overrun
Error bit (CSR.OVRE) is set. Reading RHR will clear RXRDY, and writing a one to the Reset
Status bit in the Control Register (CR.RSTSTA) will clear OVRE.
Figure 20-9. Receiver Status
20.6.3.5 Parity
The USART supports five parity modes selected by MR.PAR. The PAR field also enables the
Multidrop mode, see ”Multidrop Mode” on page 443. If even parity is selected, the parity bit will
be a zero if there is an even number of ones in the data character, and if there is an odd number
it will be a one. For odd parity the reverse applies. If space or mark parity is chosen, the parity bit
will always be a zero or one, respectively. See Table 20-4.
D0 D1 D2 D3 D4 D5 D6 D7
RXD
Start Sampling
Parity Bit
Stop Bit
Example: 8-bit, Parity Enabled 1 Stop
Baud Rate
Clock
D0 D1 D2 D3 D4 D5 D6 D7
RXD
Start
Bit
Parity
Bit
Stop
Bit
Baud Rate
Clock
Write
CR
RXRDY
OVRE
D0 D1 D2 D3 D4 D5 D6 D7 Start
Bit
Parity
Bit
Stop
Bit
RSTSTA = 1
Read
RHR
Table 20-4. Parity Bit Examples
Alphanum
Character Hex Bin
Parity Mode
Odd Even Mark Space None
A 0x41 0100 0001 1 0 1 0 -
V 0x56 0101 0110 1 0 1 0 -
R 0x52 0101 0010 0 1 1 0 -
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The receiver will report parity errors in CSR.PARE, unless parity is disabled. Writing a one to
CR.RSTSTA will clear PARE. See Figure 20-10
Figure 20-10. Parity Error
20.6.3.6 Multidrop Mode
If PAR is either 0x6 or 0x7, the USART runs in Multidrop mode. This mode differentiates data
and address characters. Data has the parity bit zero and addresses have a one. By writing a one
to the Send Address bit (CR.SENDA) the user will cause the next character written to THR to be
transmitted as an address. Receiving a character with a one as parity bit will set PARE.
20.6.3.7 Transmitter Timeguard
The timeguard feature enables the USART to interface slow devices by inserting an idle state on
the TXD line in between two characters. This idle state corresponds to a long stop bit, whose
duration is selected by the Timeguard Value field in the Transmitter Timeguard Register
(TTGR.TG). The transmitter will hold the TXD line high for TG bit periods, in addition to the number
of stop bits. As illustrated in Figure 20-11, the behavior of TXRDY and TXEMPTY is modified
when TG has a non-zero value. If a pending character has been written to THR, the TXRDY bit
will not be set until this characters start bit has been sent. TXEMPTY will remain low until the
timeguard transmission has completed.
Figure 20-11. Timeguard Operation
D0 D1 D2 D3 D4 D5 D6 D7
RXD
Start
Bit
Bad
Parity
Bit
Stop
Bit
Baud Rate
Clock
Write
CR
PARE
RXRDY
RSTSTA = 1
D0 D1 D2 D3 D4 D5 D6 D7
TXD
Start
Bit
Parity
Bit
Stop
Bit
Baud Rate
Clock
Start
Bit
TG = 4
Write
THR
D0 D1 D2 D3 D4 D5 D6 D7 Parity
Bit
Stop
Bit
TXRDY
TXEMPTY
TG = 4
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Table 20-5. Maximum Baud Rate Dependent Timeguard Durations
20.6.3.8 Receiver Time-out
The Time-out Value field in the Receiver Time-out Register (RTOR.TO) enables handling of variable-length
frames by detection of selectable idle durations on the RXD line. The value written to
TO is loaded to a decremental counter, and unless it is zero, a time-out will occur when the
amount of inactive bit periods match the initial counter value. If a time-out has not occurred, the
counter will reload and restart every time a new character arrives. A time-out sets the TIMEOUT
bit in CSR. Clearing TIMEOUT can be done in two ways:
• Writing a one to the Start Time-out bit (CR.STTTO). This also aborts count down until the
next character has been received.
• Writing a one to the Reload and Start Time-out bit (CR.RETTO). This also reloads the
counter and restarts count down immediately.
Figure 20-12. Receiver Time-out Block Diagram
Table 20-6. Maximum Time-out Period
Baud Rate (bit/sec) Bit time (µs) Timeguard (ms)
1 200 833 212.50
9 600 104 26.56
14400 69.4 17.71
19200 52.1 13.28
28800 34.7 8.85
33400 29.9 7.63
56000 17.9 4.55
57600 17.4 4.43
115200 8.7 2.21
Baud Rate (bit/sec) Bit Time (µs) Time-out (ms)
600 1 667 109 225
1 200 833 54 613
2 400 417 27 306
4 800 208 13 653
16-bit Time-out
Counter
0
TO
TIMEOUT
Baud Rate
Clock
=
Character
Received
RETTO
Load
Clock
16-bit
Value
STTTO
1 D Q
Clear
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20.6.3.9 Framing Error
The receiver is capable of detecting framing errors. A framing error has occurred if a stop bit
reads as zero. This can occur if the transmitter and receiver are not synchronized. A framing
error is reported by CSR.FRAME as soon as the error is detected, at the middle of the stop bit.
Figure 20-13. Framing Error Status
20.6.3.10 Transmit Break
When TXRDY is set, the user can request the transmitter to generate a break condition on the
TXD line by writing a one to The Start Break bit (CR.STTBRK). The break is treated as a normal
0x00 character transmission, clearing TXRDY and TXEMPTY, but with zeroes for preambles,
start, parity, stop, and time guard bits. Writing a one to the Stop Break bit (CR.STBRK) will stop
the generation of new break characters, and send ones for TG duration or at least 12 bit periods,
ensuring that the receiver detects end of break, before resuming normal operation. Figure 20-14
illustrates STTBRK and STPBRK effect on the TXD line.
Writing to STTBRK and STPBRK simultaneously can lead to unpredictable results. Writes to
THR before a pending break has started will be ignored.
9 600 104 6 827
14400 69 4 551
19200 52 3 413
28800 35 2 276
33400 30 1 962
56000 18 1 170
57600 17 1 138
200000 5 328
Baud Rate (bit/sec) Bit Time (µs) Time-out (ms)
D0 D1 D2 D3 D4 D5 D6 D7
RXD
Start
Bit
Parity
Bit
Stop
Bit
Baud Rate
Clock
Write
CR
FRAME
RXRDY
RSTSTA = 1
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Figure 20-14. Break Transmission
20.6.3.11 Receive Break
A break condition is assumed when incoming data, parity, and stop bits are zero. This corresponds
to a framing error, but FRAME will remain zero while the Break Received/End Of Break
bit (CSR.RXBRK) is set. Writing a one to CR.RSTSTA will clear RXBRK. An end of break will
also set RXBRK, and is assumed when TX is high for at least 2/16 of a bit period in asynchronous
mode, or when a high level is sampled in synchronous mode.
20.6.3.12 Hardware Handshaking
The USART features an out-of-band hardware handshaking flow control mechanism, implementable
by connecting the RTS and CTS pins with the remote device, as shown in Figure 20-
15.
Figure 20-15. Connection with a Remote Device for Hardware Handshaking
Writing 0x2 to the MR.MODE field configures the USART to operate in this mode. The receiver
will drive its RTS pin high when disabled or when the Reception Buffer Full bit (CSR.RXBUFF) is
set by the Buffer Full signal from the Peripheral DMA controller. If the receivers RTS pin is high,
the transmitters CTS pin will also be high and only the active character transactions will be completed.
Allocating a new buffer to the DMA controller by clearing RXBUFF, will drive the RTS pin
low, allowing the transmitter to resume transmission. Detected level changes on the CTS pin
can trigger interrupts, and are reported by the CTS Input Change bit in the Channel Status Register
(CSR.CTSIC).
Figure 20-16 illustrates receiver functionality, and Figure 20-17 illustrates transmitter
functionality.
D0 D1 D2 D3 D4 D5 D6 D7
TXD
Start
Bit
Parity
Bit
Stop
Bit
Baud Rate
Clock
Write
CR
TXRDY
TXEMPTY
STTBRK = 1 STPBRK = 1
Break Transmission End of Break
USART
TXD
CTS
Remote
Device
RXD
RXD TXD
RTS
RTS
CTS
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Figure 20-16. Receiver Behavior when Operating with Hardware Handshaking
Figure 20-17. Transmitter Behavior when Operating with Hardware Handshaking
Figure 20-18.
20.6.4 SPI Mode
The USART features a Serial Peripheral Interface (SPI) link compliant mode, supporting synchronous,
full-duplex communication, in both master and slave mode. Writing 0xE (master) or
0xF (slave) to MR.MODE will enable this mode. A SPI in master mode controls the data flow to
and from the other SPI devices, who are in slave mode. It is possible to let devices take turns
being masters (aka multi-master protocol), and one master may shift data simultaneously into
several slaves, but only one slave may respond at a time. A slave is selected when its slave
select (NSS) signal has been raised by the master. The USART can only generate one NSS signal,
and it is possible to use standard I/O lines to address more than one slave.
20.6.4.1 Modes of Operation
The SPI system consists of two data lines and two control lines:
• Master Out Slave In (MOSI): This line supplies the data shifted from master to slave. In
master mode this is connected to TXD, and in slave mode to RXD.
• Master In Slave Out (MISO): This line supplies the data shifted from slave to master. In
master mode this is connected to RXD, and in slave mode to TXD.
• Serial Clock (CLK): This is controlled by the master. One period per bit transmission. In both
modes this is connected to CLK.
• Slave Select (NSS): This control line allows the master to select or deselect a slave. In
master mode this is connected to RTS, and in slave mode to CTS.
Changing SPI mode after initial configuration has to be followed by a transceiver software reset
in order to avoid unpredictable behavior.
20.6.4.2 Baud Rate
The baud rate generator operates as described in ”Baud Rate in Synchronous and SPI Mode”
on page 439, with the following requirements:
In SPI Master Mode:
RTS
RXBUFF
Write
CR
RXEN = 1
RXD
RXDIS = 1
CTS
TXD
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• The Clock Selection field (MR.USCLKS) must not equal 0x3 (external clock, CLK).
• The Clock Output Select bit (MR.CLKO) must be one.
• The BRGR.CD field must be at least 0x4.
• If USCLKS is one (internal divided clock, CLK_USART/DIV), the value in CD has to be even,
ensuring a 50:50 duty cycle. CD can be odd if USCLKS is zero (internal clock, CLK_USART).
In SPI Slave Mode:
• CLK frequency must be at least four times lower than the system clock.
20.6.4.3 Data Transfer
• Up to nine data bits are successively shifted out on the TXD pin at each edge. There are no
start, parity, or stop bits, and MSB is always sent first. The SPI Clock Polarity (MR.CPOL),
and SPI Clock Phase (MR.CPHA) bits configure CLK by selecting the edges upon which bits
are shifted and sampled, resulting in four non-interoperable protocol modes see Table 20-7.
A master/slave pair must use the same configuration, and the master must be reconfigured if
it is to communicate with slaves using different configurations. See Figures 20-19 and 20-20.
Figure 20-19. SPI Transfer Format (CPHA=1, 8 bits per transfer)
Table 20-7. SPI Bus Protocol Modes
SPI Bus Protocol Mode CPOL CPHA
0 01
1 00
2 11
3 10
CLK cycle (for reference)
CLK
(CPOL= 1)
MOSI
SPI Master ->TXD
SPI Slave ->RXD
MISO
SPI Master ->RXD
SPI Slave ->TXD
NSS
SPI Master ->RTS
SPI Slave ->CTS
MSB
MSB
1
CLK
(CPOL= 0)
3 5 6 7 8
4 3 2 1 LSB
6
6 5
5 4 3 2 1 LSB
2 4
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Figure 20-20. SPI Transfer Format (CPHA=0, 8 bits per transfer)
20.6.4.4 Receiver and Transmitter Control
See ”Transmitter Operations” on page 440, and ”Receiver Operations” on page 442.
20.6.4.5 Character Transmission and Reception
In SPI master mode, the slave select line (NSS) is asserted low one bit period before the start of
transmission, and released high one bit period after every character transmission. A delay for at
least three bit periods is always inserted in between characters. In order to address slave
devices supporting the Chip Select Active After Transfer (CSAAT) mode, NSS can be forced low
by writing a one to the Force SPI Chip Select bit (CR.RTSEN/FCS). Releasing NSS when FCS
is one, is only possible by writing a one to the Release SPI Chip Select bit (CR.RTSDIS/RCS).
In SPI slave mode, a low level on NSS for at least one bit period will allow the slave to initiate a
transmission or reception. The Underrun Error bit (CSR.UNRE) is set if a character must be sent
while THR is empty, and TXD will be high during character transmission, as if 0xFF was being
sent. If a new character is written to THR it will be sent correctly during the next transmission
slot. Writing a one to CR.RSTSTA will clear UNRE. To ensure correct behavior of the receiver in
SPI slave mode, the master device sending the frame must ensure a minimum delay of one bit
period in between each character transmission.
20.6.4.6 Receiver Time-out
Receiver Time-out’s are not possible in SPI mode as the baud rate clock is only active during
data transfers.
20.6.5 LIN Mode
The USART features a LIN (Local Interconnect Network) 1.3 and 2.0 compliant mode, embedding
full error checking and reporting, automatic frame processing with up to 256 data bytes,
CLK cycle (for reference)
CLK
(CPOL= 0)
CLK
(CPOL= 1)
MOSI
SPI Master -> TXD
SPI Slave -> RXD
MISO
SPI Master -> RXD
SPI Slave -> TXD
NSS
SPI Master -> RTS
SPI Slave -> CTS
MSB 6 5
MSB 6 5
4
4 3
3 2
2 1
1 LSB
LSB
1 2 3 4 5 6 7 8
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customizable response data lengths, and requires minimal CPU resources. Writing 0xA (master)
or 0xB (slave) to MR.MODE enables this mode.
20.6.5.1 Modes of operation
Changing LIN mode after initial configuration has to be followed by a transceiver software reset
in order to avoid unpredictable behavior.
20.6.5.2 Receiver and Transmitter Control
See Section “20.6.2” on page 439.
20.6.5.3 Baud Rate Configuration
The LIN nodes baud rate is configured in the Baud Rate Generator Register (BRGR), See Section
“20.6.1.1” on page 437.
20.6.5.4 Character Transmission and Reception
See ”Transmitter Operations” on page 440, and ”Receiver Operations” on page 442.
20.6.5.5 Header Transmission (Master Node Configuration)
All LIN frames start with a header sent by the master. As soon as the identifier has been written
to the Identifier Character field in the LIN Identifier Register (LINIR.IDCHR), TXRDY is cleared
and the header is sent. The header consists of a Break, Sync, and Identifier field. TXRDY is set
when the identifier has been transferred into the transmitters shift register.
The Break field consists of 13 dominant bits, the break, and one recessive bit, the break delimiter.
The Sync field is the character 0x55. The Identifier field contains the Identifier as written to
IDCHR. The identifier parity bits can be generated automatically (see Section 20.6.5.8).
Figure 20-21. Header Transmission
20.6.5.6 Header Reception (Slave Node Configuration)
The USART stays idle until it detects a break field, consisting of at least 11 consecutive dominant
bits (zeroes) on the bus. A received break will set the Lin Break bit (CSR.LINBK). The Sync
field is used to synchronize the baud rate (see Section 20.6.5.7). IDCHR is updated and the LIN
Identifier bit (CSR.LINID) is set when the Identifier has been received. The Identifier parity bits
can be automatically checked (see Section 20.6.5.8). Writing a one to RSTSTA will clear LINBK
and LINID.
TXD
Baud Rate
Clock
Start
Bit
Write
LINIR
10101010
TXRDY
Stop
Bit
Start
Bit Break Field ID0 ID1 ID2 ID3 ID4 ID5 ID6 ID7
13 dominant bits (at 0)
Stop
Bit
Break
Delimiter
1 recessive bit
(at 1)
Synch Byte = 0x55
LINIR ID
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Figure 20-22. Header Reception
20.6.5.7 Slave Node Synchronization
Synchronization is only done by the slave. If the Sync field is not 0x55, an Inconsistent Sync
Field error (CSR.LINISFE) is generated. The time between falling edges is measured by a 19-bit
counter, driven by the sampling clock (see Section 20.6.1).
Figure 20-23. Sync Field
The counter starts when the Sync field start bit is detected, and continues for eight bit periods.
The 16 most significant bits (counter value divided by 8) becomes the new clock divider
(BRGR.CD), and the three least significant bits (the remainder) becomes the new fractional part
(BRGR.FP).
Figure 20-24. Slave Node Synchronization
The synchronization accuracy depends on:
• The theoretical slave node clock frequency; nominal clock frequency (FNom)
• The baud rate
Break Field
13 dominant bits (at 0)
Break
Delimiter
1 recessive bit
(at 1)
Start
Bit 10101010 Stop
Bit
Start
Bit ID0 ID1 ID2 ID4 ID3 ID6 ID5 ID7 Stop
Bit
Synch Byte = 0x55
Baud Rate
Clock
RXD
Write US_CR
With RSTSTA=1
US_LINIR
LINID
Start
bit
Stop
bit
Synch Field
8 Tbit
2 Tbit 2 Tbit 2 Tbit 2 Tbit
RXD
Baud Rate
Clock
LINIDRX
Synchro Counter 000_0011_0001_0110_1101
BRGR
Clcok Divider (CD)
0000_0110_0010_1101
BRGR
Fractional Part (FP)
101
Initial CD
Initial FP
Reset
Start
Bit 10101010 Stop
Bit
Start
Bit Break Field ID0 ID1 ID2 ID3 ID4 ID5 ID6 ID7
13 dominant bits (at 0)
Stop
Bit
Break
Delimiter
1 recessive bit
(at 1)
Synch Byte = 0x55
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• The oversampling mode (OVER=0 => 16x, or OVER=1 => 8x)
The following formula is used to calculate synchronization deviation, where FSLAVE is the real
slave node clock frequency, and FTOL_UNSYNC is the difference between FNom and FSLAVE According
to the LIN specification, FTOL_UNSYNCH may not exceed ±15%, and the bit rates between two
nodes must be within ±2% of each other, resulting in a maximal BaudRate_deviation of ±1%.
Minimum nominal clock frequency with a fractional part:
Examples:
• Baud rate = 20 kbit/s, OVER=0 (Oversampling 16x) => FNom(min) = 2.64 MHz
• Baud rate = 20 kbit/s, OVER=1 (Oversampling 8x) => FNom(min) = 1.47 MHz
• Baud rate = 1 kbit/s, OVER=0 (Oversampling 16x) => FNom(min) = 132 kHz
• Baud rate = 1 kbit/s, OVER=1 (Oversampling 8x) => FNom(min) = 74 kHz
If the fractional part is not used, the synchronization accuracy is much lower. The 16 most significant
bits, added with the first least significant bit, becomes the new clock divider (CD). The
equation of the baud rate deviation is the same as above, but the constants are:
Minimum nominal clock frequency without a fractional part:
Examples:
• Baud rate = 20 kbit/s, OVER=0 (Oversampling 16x) => FNom(min) = 19.12 MHz
• Baud rate = 20 kbit/s, OVER=1 (Oversampling 8x) => FNom(min) = 9.71 MHz
• Baud rate = 1 kbit/s, OVER=0 (Oversampling 16x) => FNom(min) = 956 kHz
• Baud rate = 1 kbit/s, OVER=1 (Oversampling 8x) => FNom(min) = 485 kHz
20.6.5.8 Identifier Parity
An identifier field consists of two sub-fields; the identifier and its parity. Bits 0 to 5 are assigned
to the identifier, while bits 6 and 7 are assigned to parity. Automatic parity management is disabled
by writing a one to the Parity Disable bit in the LIN Mode register (LINMR.PARDIS).
BaudRate_deviation 100 8 2 OVER – + BaudRate
8 FSLAVE -------------------------------------------------------------------------------------------------- = %
BaudRate_deviation 100 8 2 OVER – + BaudRate
8
FTOL_UNSYNC
100 ----------------------------------- xFNom
--------------------------------------------------------------------------------------------------
= %
–0.5 +0.5 -1 +1
FNom min 100 0.5 8 2 OVER – + 1 BaudRate
8 –15
100
--------- + 1 1%
------------------------------------------------------------------------------------------------------
= Hz
–4 +4 -1 +1
FNom min 100 4 8 2 OVER – + 1 Baudrate
8 –15
100
--------- + 1 1%
-----------------------------------------------------------------------------------------------
= Hz
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• PARDIS=0: During header transmission, the parity bits are computed and in the shift register
they replace bits six and seven from IDCHR. During header reception, the parity bits are
checked and can generate a LIN Identifier Parity Error (see Section 20.6.6). Bits six and
seven in IDCHR read as zero when receiving.
• PARDIS=1: During header transmission, all the bits in IDCHR are sent on the bus. During
header reception, all the bits in IDCHR are updated with the received Identifier.
20.6.5.9 Node Action
After an identifier transaction, a LIN response mode has to be selected. This is done in the Node
Action field (LINMR.NACT). Below are some response modes exemplified in a small LIN cluster:
• Response, from master to slave1:
Master: NACT=PUBLISH
Slave1: NACT=SUBSCRIBE
Slave2: NACT=IGNORE
• Response, from slave1 to master:
Master: NACT=SUBSCRIBE
Slave1: NACT=PUBLISH
Slave2: NACT=IGNORE
• Response, from slave1 to slave2:
Master: NACT=IGNORE
Slave1: NACT=PUBLISH
Slave2: NACT=SUBSCRIBE
20.6.5.10 LIN Response Data Length
The response data length is the number of data fields (bytes), excluding the checksum.
Figure 20-25. Response Data Length
The response data length can be configured, either by the user, or automatically by bits 4 and 5
in the Identifier (IDCHR), in accordance to LIN 1.1. The user selects mode by writing to the Data
Length Mode bit (LINMR.DML):
• DLM=0: the response data length is configured by the user by writing to the 8-bit Data Length
Control field (LINMR.DLC). The response data length equals DLC + 1 bytes.
User configuration: 1 - 256 data fields (DLC+1)
Identifier configuration: 2/4/8 data fields
Sync
Break
Sync
Field
Identifier
Field
Checksum
Field
Data
Field
Data
Field
Data
Field
Data
Field
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• DLM=1: the response data length is defined by the Identifier bits according to the table below.
20.6.5.11 Checksum
The last frame field is the checksum. It is configured by the Checksum Type (LINMR.CHKTYP),
and the Checksum Disable (LINMR.CHKDIS) bits. TXRDY will not be set after the last THR data
write if enabled. Writing a one to CHKDIS will disable the automatic checksum generation/checking,
and the user may send/check this last byte manually, disguised as a normal data.
The checksum is an inverted 8-bit sum with carry, either:
• over all data bytes, called a classic checksum. This is used for LIN 1.3 compliant slaves, and
automatically managed when CHKDIS=0, and CHKTYP=1.
• over all data bytes and the protected identifier, called an enhanced checksum. This is used
for LIN 2.0 compliant slaves, and automatically managed when CHKDIS=0, and CHKTYP=0.
20.6.5.12 Frame Slot Mode
A LIN master can be configured to use frame slots with a pre-defined minimum length. Writing a
one to the Frame Slot Mode Disable bit (LINMR.FSDIS) disables this mode. This mode will not
allow TXRDY to be set after a frame transfer until the entire frame slot duration has elapsed, in
effect preventing the master from sending a new header. The LIN Transfer Complete bit
(CSR.LINTC) will still be set after the checksum has been sent. Writing a one to CR.RSTST
clears LINTC.
Figure 20-26. Frame Slot Mode with Automatic Checksum
The minimum frame slot size is determined by TFrame_Maximum, and calculated below (all values
in bit periods):
• THeader_Nominal = 34
Table 20-8. Response Data Length if DLM = 1
IDCHR[5] IDCHR[4] Response Data Length [bytes]
00 2
01 2
10 4
11 8
Break Synch Protected
Identifier
Data N Checksum
Header
Interframe
space Response
space
Frame
Frame slot = TFrame_Maximum
Response
TXRDY
Write
THR
Write
LINID
Data 1 Data 2 Data 3
Data3
Data N-1
Data N
Frame Slot Mode
Disabled
Frame Slot Mode
Enabled
LINTC
Data 1
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• TFrame_Maximum = 1.4 x (THeader_Nominal + TResponse_Nominal + 1)(Note:)
Note: The term “+1” leads to an integer result for TFrame_Max (LIN Specification 1.3)
If the Checksum is sent (CHKDIS=0):
• TResponse_Nominal = 10 x (NData + 1)
• TFrame_Maximum = 1.4 x (34 + 10 x (DLC + 1 + 1) + 1)
• TFrame_Maximum = 77 + 14 x DLC
If the Checksum is not sent (CHKDIS=1):
• TResponse_Nominal = 10 x NData
• TFrame_Maximum = 1.4 x (34 + 10 x (DLC + 1) + 1)
• TFrame_Maximum = 63 + 14 x DLC
20.6.6 LIN Errors
These error bits are cleared by writing a one to CSR.RSTSTA.
20.6.6.1 Slave Not Responding Error (CSR.LINSNRE)
This error is generated if no valid message appears within the TFrame_Maximum time frame
slot, while the USART is expecting a response from another node (NACT=SUBSCRIBE).
20.6.6.2 Checksum Error (CSR.LINCE)
This error is generated if the received checksum is wrong. This error can only be generated if the
checksum feature is enabled (CHKDIS=0).
20.6.6.3 Identifier Parity Error (CSR.LINIPE)
This error is generated if the identifier parity is wrong. This error can only be generated if parity is
enabled (PARDIS=0).
20.6.6.4 Inconsistent Sync Field Error (CSR.LINISFE)
This error is generated in slave mode if the Sync Field character received is not 0x55. Synchronization
procedure is aborted.
20.6.6.5 Bit Error (CSR.LINBE)
This error is generated if the value transmitted by the USART on Tx differs from the value sampled
on Rx. If a bit error is detected, the transmission is aborted at the next byte border.
20.6.7 LIN Frame Handling
20.6.7.1 Master Node Configuration
• Write a one to CR.TXEN and CR.RXEN to enable both transmitter and receiver
• Select LIN mode and master node by writing to MR.MODE
• Configure the baud rate by writing to CD and FP in BRGR
• Configure the frame transfer by writing to NACT, PARDIS, CHKDIS, CHKTYPE, DLCM,
FSDIS, and DLC in LINMR
• Check that CSR.TXRDY is one
• Send the header by writing to LINIR.IDCHR
The following procedure depends on the NACT setting:
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• Case 1: NACT=PUBLISH, the USART sends a response
– Wait until TXRDY is a one
– Send a byte by writing to THR.TXCHR
– Repeat the two previous steps until there is no more data to send
– Wait until CSR.LINTC is a one
– Check for LIN errors
• Case 2: NACT=SUBSCRIBE, the USART receives a response
– Wait until RXRDY is a one
– Read RHR.RXCHR
– Repeat the two previous steps until there is no more data to read
– Wait until LINTC is a one
– Check for LIN errors
• Case 3: NACT=IGNORE, the USART is not concerned by a response
– Wait until LINTC is a one
– Check for LIN errors
Figure 20-27. Master Node Configuration, NACT=PUBLISH
Frame
Break Synch Protected
Identifier
Data 1 Data N Checksum
TXRDY
Write
THR
Write
LINIR
Data 1 Data 2 Data 3
Data N-1
Data N
RXRDY
Header
Interframe
space Response
space
Frame slot = TFrame_Maximum
Data3 Response
LINTC
FSDIS=1 FSDIS=0
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Figure 20-28. Master Node Configuration, NACT=SUBSCRIBE
Figure 20-29. Master Node Configuration, NACT=IGNORE
20.6.7.2 Slave Node Configuration
This is identical to the master node configuration above, except for:
• LIN mode selected in MR.MODE is slave
• When the baud rate is configured, wait until CSR.LINID is a one, then;
• Check for LINISFE and LINPE errors, clear errors and LINIDby writing a one to RSTSTA
• Read IDCHR
• Configure the frame transfer by writing to NACT, PARDIS, CHKDIS, CHKTYPE, DLCM, and
DLC in LINMR
IMPORTANT: if NACT=PUBLISH, and this field is already correct, the LINMR register must still
be written with this value in order to set TXRDY, and to request the corresponding Peripheral
DMA Controller write transfer.
The different NACT settings result in the same procedure as for the master node, see page 455.
Break Synch Protected
Identifier
Data 1 Data N Checksum
TXRDY
Read
RHR
Write
LINIR
Data 1
Data N-1
Data N-1
RXRDY
Data N-2 Data N
Header
Interframe
Response space
space
Frame
Frame slot = TFrame_Maximum
Data3 Response
LINTC
FSDIS=1 FSDIS=0
TXRDY
Write
LINIR
RXRDY
LINTC
Break Synch Protected
Identifier
Data 1 Data N-1 Data N Checksum
Header
Interframe
Response space
space
Frame
Frame slot = TFrame_Maximum
Data3 Response
FSDIS=1 FSDIS=0
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Figure 20-30. Slave Node Configuration, NACT=PUBLISH
Figure 20-31. Slave Node Configuration, NACT=SUBSCRIBE
Figure 20-32. Slave Node Configuration, NACT=IGNORE
20.6.8 LIN Frame Handling With The Peripheral DMA Controller
The USART can be used together with the Peripheral DMA Controller in order to transfer data
without processor intervention. The DMA Controller uses the TXRDY and RXRDY bits, to trigger
one byte writes or reads. It always writes to THR, and it always reads RHR.
Break Synch Protected
Identifier
Data 1 Data N Checksum
TXRDY
Write
THR
Read
LINID
Data 1 Data 3
Data N-1
Data N
RXRDY
LINIDRX
Data 2
LINTC
TXRDY
Read
RHR
Read
LINID
RXRDY
LINIDRX
LINTC
Break Synch Protected
Identifier
Data 1 Data N Checksum
Data 1
Data N-1
Data N-2 Data N-1 Data N
TXRDY
Read
RHR
Read
LINID
RXRDY
LINIDRX
LINTC
Break Synch Protected
Identifier
Data 1 Data N Checksum Data N-1
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20.6.8.1 Master Node Configuration
The Peripheral DMA Controller Mode bit (LINMR.PDCM) allows the user to select configuration:
• PDCM=0: LIN configuration must be written to LINMR, it is not stored in the write buffer.
• PDCM=1: LIN configuration is written by the DMA Controller to THR, and is stored in the
write buffer. Since data transfer size is a byte, the transfer is split into two accesses. The first
writes the NACT, PARDIS, CHKDIS, CHKTYP, DLM and FSDIS bits, while the second writes
the DLC field. If NACT=PUBLISH, the write buffer will also contain the Identifier.
When NACT=SUBSCRIBE, the read buffer contains the data.
Figure 20-33. Master Node with Peripheral DMA Controller (PDCM=0)
Figure 20-34. Master Node with Peripheral DMA Controller (PDCM=1)
|
|
|
|
RXRDY
TXRDY
Peripheral
bus
USART LIN
CONTROLLER
DATA 0
DATA N
|
|
|
|
READ BUFFER
NODE ACTION = PUBLISH NODE ACTION = SUBSCRIBE
Peripheral DMA
Controller
RXRDY
Peripheral
bus
DATA 0
DATA 1
DATA N
WRITE BUFFER
Peripheral DMA
Controller
USART LIN
CONTROLLER
|
|
|
|
|
|
|
|
NACT
PARDIS
CHKDIS
CHKTYP DLM
FSDIS
DLC
IDENTIFIER
DATA 0
DATA N
WRITE BUFFER
RXRDY
Peripheral
bus
DLC
IDENTIFIER
DATA 0
DATA N
WRITE BUFFER
RXRDY READ BUFFER
NODE ACTION = PUBLISH NODE ACTION = SUBSCRIBE
Peripheral DMA
Controller
Peripheral DMA
Controller
USART LIN
CONTROLLER
NACT
PARDIS
CHKDIS
CHKTYP DLM
FSDIS
USART LIN
CONTROLLER
TXRDY
Peripheral
bus
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20.6.8.2 Slave Node Configuration
In this mode, the Peripheral DMA Controller transfers only data. The user reads the Identifier
from LINIR, and selects LIN mode by writing to LINMR. When NACT=PUBLISH the data is in the
write buffer, while the read buffer contains the data when NACT=SUBSCRIBE.
IMPORTANT: if in slave mode, NACT is already configured correctly as PUBLISH, the LINMR
register must still be written with this value in order to set TXRDY, and to request the corresponding
Peripheral DMA Controller write transfer.
Figure 20-35. Slave Node with Peripheral DMA Controller
20.6.9 Wake-up Request
Any node in a sleeping LIN cluster may request a wake-up. By writing to the Wakeup Signal
Type bit (LINMR.WKUPTYP), the user can choose to send either a LIN 1.3 (WKUPTYP=1), or a
LIN 2.0 (WKUPTYP=0) compliant wakeup request. Writing a one to the Send LIN Wakeup Signal
bit (CR.LINWKUP), transmits a wakeup, and when completed sets LINTC.
According to LIN 1.3, the wakeup request should be generated with the character 0x80 in order
to impose eight successive dominant bits.
According to LIN 2.0, the wakeup request is issued by forcing the bus into the dominant state for
250µs to 5ms. Sending the character 0xF0 does this, regardless of baud rate.
• Baud rate max = 20 kbit/s -> one bit period = 50µs -> five bit periods = 250µs
• Baud rate min = 1 kbit/s -> one bit period = 1ms -> five bit periods = 5ms
20.6.10 Bus Idle Time-out
LIN bus inactivity should eventually cause slaves to time-out and enter sleep mode. LIN 1.3
specifies this to 25000 bit periods, whilst LIN 2.0 specifies 4seconds. For the time-out counter
operation see Section 20.6.3.8 ”Receiver Time-out” on page 444.
|
|
|
|
|
|
|
|
DATA 0
DATA N
RXRDY
Peripheral
Bus
READ BUFFER
NACT = SUBSCRIBE DATA 0
DATA N
TXRDY
Peripheral
bus
WRITE BUFFER
USART LIN
CONTROLLER
USART LIN
CONTROLLER
Peripheral DMA
Controller
Peripheral DMA
Controller
Table 20-9. Receiver Time-out Values (RTOR.TO)
LIN Specification Baud Rate Time-out period TO
2.0
1 000 bit/s
4s
4 000
2 400 bit/s 9 600
9 600 bit/s 38 400
19 200 bit/s 76 800
20 000 bit/s 80 000
1.3 - 25 000 bit periods 25 000
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20.6.11 Test Modes
The internal loopback feature enables on-board diagnostics, and allows the USART to operate
in three different test modes, with reconfigured pin functionality, as shown below.
20.6.11.1 Normal Mode
During normal operation, a receivers RXD pin is connected to a transmitters TXD pin.
Figure 20-36. Normal Mode Configuration
20.6.11.2 Automatic Echo Mode
Automatic echo mode allows bit-by-bit retransmission. When a bit is received on the RXD pin, it
is also sent to the TXD pin, as shown in Figure 20-37. Transmitter configuration has no effect.
Figure 20-37. Automatic Echo Mode Configuration
20.6.11.3 Local Loopback Mode
Local loopback mode connects the output of the transmitter directly to the input of the receiver,
as shown in Figure 20-38. The TXD and RXD pins are not used. The RXD pin has no effect on
the receiver and the TXD pin is continuously driven high, as in idle state.
Figure 20-38. Local Loopback Mode Configuration
20.6.11.4 Remote Loopback Mode
Remote loopback mode connects the RXD pin to the TXD pin, as shown in Figure 20-39. The
transmitter and the receiver are disabled and have no effect. This mode allows bit-by-bit
retransmission.
Receiver
Transmitter
RXD
TXD
Receiver
Transmitter
RXD
TXD
Receiver
Transmitter
RXD
TXD
1
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Figure 20-39. Remote Loopback Mode Configuration
20.6.12 Write Protection Registers
To prevent single software errors from corrupting USART behavior, certain address spaces can
be write-protected by writing the correct Write Protect KEY and a one to the Write Protect
Enable bit in the Write Protect Mode Register (WPMR.WPKEY, and WPMR.WPEN). Disabling
the write protection is done by writing the correct key, and a zero to WPEN.
Write attempts to a write protected register are detected and the Write Protect Violation Status
bit in the Write Protect Status Register (WPSR.WPVS) is set, while the Write Protect Violation
Source field (WPSR.WPVSRC) indicates the targeted register. Writing the correct key to the
Write Protect KEY bit (WPMR.WPKEY) clears WPVSRC and WPVS.
The protected registers are:
• ”Mode Register” on page 466
• ”Baud Rate Generator Register” on page 476
• ”Receiver Time-out Register” on page 477
• ”Transmitter Timeguard Register” on page 478
Receiver
Transmitter
RXD
TXD
1
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20.7 User Interface
Note: 1. Values in the Version Register vary with the version of the IP block implementation.
Table 20-10. USART Register Memory Map
Offset Register Name Access Reset
0x0000 Control Register CR Write-only 0x00000000
0x0004 Mode Register MR Read-write 0x00000000
0x0008 Interrupt Enable Register IER Write-only 0x00000000
0x000C Interrupt Disable Register IDR Write-only 0x00000000
0x0010 Interrupt Mask Register IMR Read-only 0x00000000
0x0014 Channel Status Register CSR Read-only 0x00000000
0x0018 Receiver Holding Register RHR Read-only 0x00000000
0x001C Transmitter Holding Register THR Write-only 0x00000000
0x0020 Baud Rate Generator Register BRGR Read-write 0x00000000
0x0024 Receiver Time-out Register RTOR Read-write 0x00000000
0x0028 Transmitter Timeguard Register TTGR Read-write 0x00000000
0x0054 LIN Mode Register LINMR Read-write 0x00000000
0x0058 LIN Identifier Register LINIR Read-write 0x00000000
0x00E4 Write Protect Mode Register WPMR Read-write 0x00000000
0x00E8 Write Protect Status Register WPSR Read-only 0x00000000
0x00FC Version Register VERSION Read-only 0x–(1)
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20.7.1 Control Register
Name: CR
Access Type: Write-only
Offset: 0x0
Reset Value: 0x00000000
• LINWKUP: Send LIN Wakeup Signal
Writing a zero to this bit has no effect.
Writing a one to this bit will sends a wakeup signal on the LIN bus.
• LINABT: Abort LIN Transmission
Writing a zero to this bit has no effect.
Writing a one to this bit will abort the current LIN transmission.
• RTSDIS/RCS: Request to Send Disable/Release SPI Chip Select
Writing a zero to this bit has no effect.
Writing a one to this bit when USART is not in SPI master mode drives RTS pin high.
Writing a one to this bit when USART is in SPI master mode releases NSS (RTS pin).
• RTSEN/FCS: Request to Send Enable/Force SPI Chip Select
Writing a zero to this bit has no effect.
Writing a one to this bit when USART is not in SPI master mode drives RTS low.
Writing a one to this bit when USART is in SPI master mode when;
FCS=0: has no effect.
FCS=1: forces NSS (RTS pin) low, even if USART is not transmitting, in order to address SPI slave devices supporting the
CSAAT Mode (Chip Select Active After Transfer).
• RETTO: Rearm Time-out
Writing a zero to this bit has no effect.
Writing a one to this bit reloads the time-out counter and clears CSR.TIMEOUT.
• RSTNACK: Reset Non Acknowledge
Writing a zero to this bit has no effect.
Writing a one to this bit clears CSR.NACK.
• SENDA: Send Address
Writing a zero to this bit has no effect.
Writing a one to this bit will in multidrop mode send the next character written to THR as an address.
• STTTO: Start Time-out
Writing a zero to this bit has no effect.
Writing a one to this bit will abort any current time-out count down, and trigger a new count down when the next character has
been received. CSR.TIMEOUT is also cleared.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
– – LINWKUP LINABT RTSDIS/RCS RTSEN/FCS – –
15 14 13 12 11 10 9 8
RETTO RSTNACK – SENDA STTTO STPBRK STTBRK RSTSTA
76543210
TXDIS TXEN RXDIS RXEN RSTTX RSTRX – –
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• STPBRK: Stop Break
Writing a zero to this bit has no effect.
Writing a one to this bit will stop the generation of break signal characters, and then send ones for TTGR.TG duration, or at least
12 bit periods. No effect if no break is being transmitted.
• STTBRK: Start Break
Writing a zero to this bit has no effect.
Writing a one to this bit will start transmission of break characters when current characters present in THR and the transmit shift
register have been sent. No effect if a break signal is already being generated.
• RSTSTA: Reset Status Bits
Writing a zero to this bit has no effect.
Writing a one to this bit will clear the following bits in CSR: PARE, FRAME, OVRE, LINBE, LINSFE, LINIPE, LINCE, LINSNRE,
and RXBRK.
• TXDIS: Transmitter Disable
Writing a zero to this bit has no effect.
Writing a one to this bit disables the transmitter.
• TXEN: Transmitter Enable
Writing a zero to this bit has no effect.
Writing a one to this bit enables the transmitter if TXDIS is zero.
• RXDIS: Receiver Disable
Writing a zero to this bit has no effect.
Writing a one to this bit disables the receiver.
• RXEN: Receiver Enable
Writing a zero to this bit has no effect.
Writing a one to this bit enables the receiver if RXDIS is zero.
• RSTTX: Reset Transmitter
Writing a zero to this bit has no effect.
Writing a one to this bit will reset the transmitter.
• RSTRX: Reset Receiver
Writing a zero to this bit has no effect.
Writing a one to this bit will reset the receiver.
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20.7.2 Mode Register
Name: MR
Access Type: Read-write
Offset: 0x4
Reset Value: 0x00000000
This register can only be written if the WPEN bit is cleared in the Write Protect Mode Register.
• INACK: Inhibit Non Acknowledge
0: The NACK is generated.
1: The NACK is not generated.
• OVER: Oversampling Mode
0: Oversampling at 16 times the baud rate.
1: Oversampling at 8 times the baud rate.
• CLKO: Clock Output Select
0: The USART does not drive the CLK pin.
1: The USART drives the CLK pin unless USCLKS selects the external clock.
• MODE9: 9-bit Character Length
0: CHRL defines character length.
1: 9-bit character length.
• MSBF/CPOL: Bit Order or SPI Clock Polarity
If USART does not operate in SPI Mode:
MSBF=0: Least Significant Bit is sent/received first.
MSBF=1: Most Significant Bit is sent/received first.
If USART operates in SPI Mode, CPOL is used with CPHA to produce the required clock/data relationship between devices.
CPOL=0: The inactive state value of CLK is logic level zero.
CPOL=1: The inactive state value of CLK is logic level one.
31 30 29 28 27 26 25 24
––––– –
23 22 21 20 19 18 17 16
– – – INACK OVER CLKO MODE9 MSBF/CPOL
15 14 13 12 11 10 9 8
CHMODE NBSTOP PAR SYNC/CPHA
76543210
CHRL USCLKS MODE
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• CHMODE: Channel Mode
• NBSTOP: Number of Stop Bits
• PAR: Parity Type
• SYNC/CPHA: Synchronous Mode Select or SPI Clock Phase
If USART does not operate in SPI Mode (MODE is 0xE and 0xF):
SYNC = 0: USART operates in Asynchronous Mode.
SYNC = 1: USART operates in Synchronous Mode.
If USART operates in SPI Mode, CPHA determines which edge of CLK causes data to change and which edge causes data to
be captured. CPHA is used with CPOL to produce the required clock/data relationship between master and slave devices.
CPHA = 0: Data is changed on the leading edge of CLK and captured on the following edge of CLK.
CPHA = 1: Data is captured on the leading edge of CLK and changed on the following edge of CLK.
Table 20-11.
CHMODE Mode Description
0 0 Normal Mode
0 1 Automatic Echo. Receiver input is connected to the TXD pin.
1 0 Local Loopback. Transmitter output is connected to the Receiver input.
1 1 Remote Loopback. RXD pin is internally connected to the TXD pin.
Table 20-12.
NBSTOP Asynchronous (SYNC=0) Synchronous (SYNC=1)
0 0 1 stop bit 1 stop bit
0 1 1.5 stop bits Reserved
1 0 2 stop bits 2 stop bits
1 1 Reserved Reserved
Table 20-13.
PAR Parity Type
0 0 0 Even parity
0 0 1 Odd parity
0 1 0 Parity forced to 0 (Space)
0 1 1 Parity forced to 1 (Mark)
1 0 x No parity
1 1 x Multidrop mode
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• CHRL: Character Length.
• USCLKS: Clock Selection
Note: 1. The value of DIV is device dependent. Please refer to the Module Configuration section at the end of this chapter.
• MODE
Table 20-14.
CHRL Character Length
0 0 5 bits
0 1 6 bits
1 0 7 bits
1 1 8 bits
Table 20-15.
USCLKS Selected Clock
0 0 CLK_USART
0 1 CLK_USART/DIV(1)
1 0 Reserved
1 1 CLK
Table 20-16.
MODE Mode of the USART
0 0 0 0 Normal
0 0 1 0 Hardware Handshaking
1 0 1 0 LIN Master
1 0 1 1 LIN Slave
1 1 1 0 SPI Master
1 1 1 1 SPI Slave
Others Reserved
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20.7.3 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x8
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
– – LINSNRE LINCE LINIPE LINISFE LINBE –
23 22 21 20 19 18 17 16
– – – – CTSIC – – –
15 14 13 12 11 10 9 8
LINTC LINID NACK/LINBK RXBUFF – ITER/UNRE TXEMPTY TIMEOUT
76543210
PARE FRAME OVRE – – RXBRK TXRDY RXRDY
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20.7.4 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0xC
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
– – LINSNRE LINCE LINIPE LINISFE LINBE –
23 22 21 20 19 18 17 16
– – – – CTSIC – – –
15 14 13 12 11 10 9 8
LINTC LINID NACK/LINBK RXBUFF – ITER/UNRE TXEMPTY TIMEOUT
76543210
PARE FRAME OVRE – – RXBRK TXRDY RXRDY
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20.7.5 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x10
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
– – LINSNRE LINCE LINIPE LINISFE LINBE –
23 22 21 20 19 18 17 16
– – – – CTSIC – – –
15 14 13 12 11 10 9 8
LINTC LINID NACK/LINBK RXBUFF – ITER/UNRE TXEMPTY TIMEOUT
76543210
PARE FRAME OVRE – – RXBRK TXRDY RXRDY
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20.7.6 Channel Status Register
Name: CSR
Access Type: Read-only
Offset: 0x14
Reset Value: 0x00000000
• LINSNRE: LIN Slave Not Responding Error
0: No LIN Slave Not Responding Error has been detected since the last RSTSTA.
1: A LIN Slave Not Responding Error has been detected since the last RSTSTA.
• LINCE: LIN Checksum Error
0: No LIN Checksum Error has been detected since the last RSTSTA.
1: A LIN Checksum Error has been detected since the last RSTSTA.
• LINIPE: LIN Identifier Parity Error
0: No LIN Identifier Parity Error has been detected since the last RSTSTA.
1: A LIN Identifier Parity Error has been detected since the last RSTSTA.
• LINISFE: LIN Inconsistent Sync Field Error
0: No LIN Inconsistent Sync Field Error has been detected since the last RSTSTA
1: The USART is configured as a Slave node and a LIN Inconsistent Sync Field Error has been detected since the last RSTSTA.
• LINBE: LIN Bit Error
0: No Bit Error has been detected since the last RSTSTA.
1: A Bit Error has been detected since the last RSTSTA.
• CTS: Image of CTS Input
0: CTS is low.
1: CTS is high.
• CTSIC: Clear to Send Input Change Flag
0: No change has been detected on the CTS pin since the last CSR read.
1: At least one change has been detected on the CTS pin since the last CSR read.
• LINTC: LIN Transfer Completed
0: The USART is either idle or a LIN transfer is ongoing.
1: A LIN transfer has been completed since the last RSTSTA.
• LINID: LIN Identifier
0: No LIN Identifier has been sent or received.
1: A LIN Identifier has been sent (master) or received (slave), since the last RSTSTA.
• NACK: Non Acknowledge
0: No Non Acknowledge has been detected since the last RSTNACK.
1: At least one Non Acknowledge has been detected since the last RSTNACK.
• RXBUFF: Reception Buffer Full
0: The Buffer Full signal from the Peripheral DMA Controller channel is inactive.
31 30 29 28 27 26 25 24
– – LINSNRE LINCE LINIPE LINISFE LINBE –
23 22 21 20 19 18 17 16
CTS – – – CTSIC – – –
15 14 13 12 11 10 9 8
LINTC LINID NACK/LINBK RXBUFF – ITER/UNRE TXEMPTY TIMEOUT
76543210
PARE FRAME OVRE – – RXBRK TXRDY RXRDY
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1: The Buffer Full signal from the Peripheral DMA Controller channel is active.
• ITER/UNRE: Max number of Repetitions Reached or SPI Underrun Error
If USART does not operate in SPI Slave Mode:
ITER=0: Maximum number of repetitions has not been reached since the last RSTSTA.
ITER=1: Maximum number of repetitions has been reached since the last RSTSTA.
If USART operates in SPI Slave Mode:
UNRE=0: No SPI underrun error has occurred since the last RSTSTA.
UNRE=1: At least one SPI underrun error has occurred since the last RSTSTA.
• TXEMPTY: Transmitter Empty
0: The transmitter is either disabled or there are characters in THR, or in the transmit shift register.
1: There are no characters in neither THR, nor in the transmit shift register.
• TIMEOUT: Receiver Time-out
0: There has not been a time-out since the last Start Time-out command (CR.STTTO), or RTOR.TO is zero.
1: There has been a time-out since the last Start Time-out command.
• PARE: Parity Error
0: Either no parity error has been detected, or the parity bit is a zero in multidrop mode, since the last RSTSTA.
1: Either at least one parity error has been detected, or the parity bit is a one in multidrop mode, since the last RSTSTA.
• FRAME: Framing Error
0: No stop bit has been found as low since the last RSTSTA.
1: At least one stop bit has been found as low since the last RSTSTA.
• OVRE: Overrun Error
0: No overrun error has occurred since the last RSTSTA.
1: At least one overrun error has occurred since the last RSTSTA.
• RXBRK: Break Received/End of Break
0: No Break received or End of Break detected since the last RSTSTA.
1: Break received or End of Break detected since the last RSTSTA.
• TXRDY: Transmitter Ready
0: The transmitter is either disabled, or a character in THR is waiting to be transferred to the transmit shift register, or an
STTBRK command has been requested. As soon as the transmitter is enabled, TXRDY becomes one.
1: There is no character in the THR.
• RXRDY: Receiver Ready
0: The receiver is either disabled, or no complete character has been received since the last read of RHR. If characters were
being received when the receiver was disabled, RXRDY changes to 1 when the receiver is enabled.
1: At least one complete character has been received and RHR has not yet been read.
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20.7.7 Receiver Holding Register
Name: RHR
Access Type: Read-only
Offset: 0x18
Reset Value: 0x00000000
• RXCHR: Received Character
Last received character.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
– – – – – – – RXCHR[8]
76543210
RXCHR[7:0]
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20.7.8 Transmitter Holding Register
Name: THR
Access Type: Write-only
Offset: 0x1C
Reset Value: 0x00000000
• TXCHR: Character to be Transmitted
If TXRDY is zero this field contains the next character to be transmitted.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
– – – – – – – TXCHR[8]
76543210
TXCHR[7:0]
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20.7.9 Baud Rate Generator Register
Name: BRGR
Access Type: Read-write
Offset: 0x20
Reset Value: 0x00000000
This register can only be written to if write protection is disabled, see ”Write Protect Mode Register” on page 482.
• FP: Fractional Part
0: Fractional divider is disabled.
1 - 7: Baud rate resolution, defined by FP x 1/8.
• CD: Clock Divider
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
– – – – – FP
15 14 13 12 11 10 9 8
CD[15:8]
76543210
CD[7:0]
Table 20-17.
CD
SYNC = 0
SYNC = 1
or
MODE = SPI
(Master or Slave)
OVER = 0 OVER = 1
0 Baud Rate Clock Disabled
1 to 65535
Baud Rate =
Selected Clock/16/CD
Baud Rate =
Selected Clock/8/CD
Baud Rate =
Selected Clock /CD
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20.7.10 Receiver Time-out Register
Name: RTOR
Access Type: Read-write
Offset: 0x24
Reset Value: 0x00000000
This register can only be written to if write protection is disabled, see ”Write Protect Mode Register” on page 482.
• TO: Time-out Value
0: The receiver Time-out is disabled.
1 - 131071: The receiver Time-out is enabled and the time-out delay is TO x bit period.
Note that the size of the TO counter is device dependent, see the Module Configuration section.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
– – – – – – – TO[16]
15 14 13 12 11 10 9 8
TO[15:8]
76543210
TO[7:0]
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20.7.11 Transmitter Timeguard Register
Name: TTGR
Access Type: Read-write
Offset: 0x28
Reset Value: 0x00000000
This register can only be written to if write protection is disabled, see ”Write Protect Mode Register” on page 482.
• TG: Timeguard Value
0: The transmitter Timeguard is disabled.
1 - 255: The transmitter timeguard is enabled and the timeguard delay is TG x bit period.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
––––––––
76543210
TG
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20.7.12 LIN Mode Register
Name: LINMR
Access Type: Read-write
Offset: 0x54
Reset Value: 0x00000000
• PDCM: Peripheral DMA Controller Mode
0: The LIN mode register is not written by the Peripheral DMA Controller.
1: The LIN mode register is, except for this bit, written by the Peripheral DMA Controller.
• DLC: Data Length Control
0 - 255: If DLM=0 this field defines the response data length to DLC+1 bytes.
• WKUPTYP: Wakeup Signal Type
0: Writing a one to CR.LINWKUP will send a LIN 2.0 wakeup signal.
1: Writing a one to CR.LINWKUP will send a LIN 1.3 wakeup signal.
• FSDIS: Frame Slot Mode Disable
0: The Frame Slot mode is enabled.
1: The Frame Slot mode is disabled.
• DLM: Data Length Mode
0: The response data length is defined by DLC.
1: The response data length is defined by bits 4 and 5 of the Identifier (LINIR.IDCHR).
• CHKTYP: Checksum Type
0: LIN 2.0 “Enhanced” checksum
1: LIN 1.3 “Classic” checksum
• CHKDIS: Checksum Disable
0: Checksum is automatically computed and sent when master, and checked when slave.
1: Checksum is not computed and sent, nor checked.
• PARDIS: Parity Disable
0: Identifier parity is automatically computed and sent when master, and checked when slave.
1: Identifier parity is not computed and sent, nor checked.
• NACT: LIN Node Action
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
– – – – – – – PDCM
15 14 13 12 11 10 9 8
DLC
76543210
WKUPTYP FSDIS DLM CHKTYP CHKDIS PARDIS NACT
Table 20-18.
NACT Mode Description
0 0 PUBLISH: The USART transmits the response.
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0 1 SUBSCRIBE: The USART receives the response.
1 0 IGNORE: The USART does not transmit and does not receive the response.
1 1 Reserved
Table 20-18.
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20.7.13 LIN Identifier Register
Name: LINIR
Access Type: Read-write or Read-only
Offset: 0x58
Reset Value: 0x00000000
• IDCHR: Identifier Character
If USART is in LIN master mode, the IDCHR field is read-write, and its value is the Identifier character to be transmitted.
If USART is in LIN slave mode, the IDCHR field is read-only, and its value is the last received Identifier character.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
––––––––
15 14 13 12 11 10 9 8
––––––––
76543210
IDCHR
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20.7.14 Write Protect Mode Register
Register Name: WPMR
Access Type: Read-write
Offset: 0xE4
Reset Value: See Table 20-10
• WPKEY: Write Protect KEY
Has to be written to 0x555341 (“USA” in ASCII) in order to successfully write WPEN. Always reads as zero.
• WPEN: Write Protect Enable
0 = Write protection disabled.
1 = Write protection enabled.
Protects the registers:
• ”Mode Register” on page 466
• ”Baud Rate Generator Register” on page 476
• ”Receiver Time-out Register” on page 477
• ”Transmitter Timeguard Register” on page 478
31 30 29 28 27 26 25 24
WPKEY[23:16]
23 22 21 20 19 18 17 16
WPKEY[15:8]
15 14 13 12 11 10 9 8
WPKEY[7:0]
76543210
— — — — — — — WPEN
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20.7.15 Write Protect Status Register
Register Name: WPSR
Access Type: Read-only
Offset: 0xE8
Reset Value: See Table 20-10
• WPVSRC: Write Protect Violation Source
If WPVS=1 this field indicates which write-protected register was unsuccessfully written to, either by address offset or code.
• WPVS: Write Protect Violation Status
0= No write protect violation has occurred since the last WPSR read.
1= A write protect violation has occurred since the last WPSR read.
Note: Reading WPSR automatically clears all fields.
31 30 29 28 27 26 25 24
————————
23 22 21 20 19 18 17 16
WPVSRC[15:8]
15 14 13 12 11 10 9 8
WPVSRC[7:0]
76543210
— — — — — — — WPVS
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20.7.16 Version Register
Name: VERSION
Access Type: Read-only
Offset: 0xFC
Reset Value: -
• MFN
Reserved. No functionality associated.
• VERSION
Version of the module. No functionality associated.
31 30 29 28 27 26 25 24
––––––––
23 22 21 20 19 18 17 16
– – – – MFN
15 14 13 12 11 10 9 8
– – – – VERSION[11:8]
76543210
VERSION[7:0]
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20.8 Module Configuration
The specific configuration for each USART instance is listed in the following tables.The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 20-19. USART Configuration
Feature USART0 USART1 USART2 USART3
Receiver Time-out Counter Size
(Size of the RTOR.TO field) 17 bit 17 bit 17 bit 17 bit
DIV Value for divided CLK_USART 8 8 8 8
Table 20-20. USART Clocks
Module Name Clock Name Description
USART0 CLK_USART0 Clock for the USART0 bus interface
USART1 CLK_USART1 Clock for the USART1 bus interface
USART2 CLK_USART2 Clock for the USART2 bus interface
USART3 CLK_USART3 Clock for the USART3 bus interface
Table 20-21. Register Reset Values
Register Reset Value
VERSION 0x00000440
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21. Serial Peripheral Interface (SPI)
Rev: 2.1.1.3
21.1 Features
• Compatible with an embedded 32-bit microcontroller
• Supports communication with serial external devices
– Four chip selects with external decoder support allow communication with up to 15
peripherals
– Serial memories, such as DataFlash and 3-wire EEPROMs
– Serial peripherals, such as ADCs, DACs, LCD controllers, CAN controllers and Sensors
– External co-processors
• Master or Slave Serial Peripheral Bus Interface
– 4 - to 16-bit programmable data length per chip select
– Programmable phase and polarity per chip select
– Programmable transfer delays between consecutive transfers and between clock and data
per chip select
– Programmable delay between consecutive transfers
– Selectable mode fault detection
• Connection to Peripheral DMA Controller channel capabilities optimizes data transfers
– One channel for the receiver, one channel for the transmitter
– Next buffer support
– Four character FIFO in reception
21.2 Overview
The Serial Peripheral Interface (SPI) circuit is a synchronous serial data link that provides communication
with external devices in Master or Slave mode. It also enables communication
between processors if an external processor is connected to the system.
The Serial Peripheral Interface is essentially a shift register that serially transmits data bits to
other SPIs. During a data transfer, one SPI system acts as the “master”' which controls the data
flow, while the other devices act as “slaves'' which have data shifted into and out by the master.
Different CPUs can take turn being masters (Multiple Master Protocol opposite to Single Master
Protocol where one CPU is always the master while all of the others are always slaves) and one
master may simultaneously shift data into multiple slaves. However, only one slave may drive its
output to write data back to the master at any given time.
A slave device is selected when the master asserts its NSS signal. If multiple slave devices
exist, the master generates a separate slave select signal for each slave (NPCS).
The SPI system consists of two data lines and two control lines:
• Master Out Slave In (MOSI): this data line supplies the output data from the master shifted
into the input(s) of the slave(s).
• Master In Slave Out (MISO): this data line supplies the output data from a slave to the input of
the master. There may be no more than one slave transmitting data during any particular
transfer.
• Serial Clock (SPCK): this control line is driven by the master and regulates the flow of the
data bits. The master may transmit data at a variety of baud rates; the SPCK line cycles once
for each bit that is transmitted.
• Slave Select (NSS): this control line allows slaves to be turned on and off by hardware.
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21.3 Block Diagram
Figure 21-1. SPI Block Diagram
21.4 Application Block Diagram
Figure 21-2. Application Block Diagram: Single Master/Multiple Slave Implementation
Spi Interface
Interrupt Control
Peripheral DMA
Controller
I/O
Controller
CLK_SPI
Peripheral Bus
SPI Interrupt
SPCK
NPCS3
NPCS2
NPCS1
NPCS0/NSS
MOSI
MISO
Slave 0
Slave 2
Slave 1
SPCK
NPCS3
NPCS2
NPCS1
NPCS0
MOSI
MISO
Spi Master
SPCK
NSS
MOSI
MISO
SPCK
NSS
MOSI
MISO
SPCK
NSS
MOSI
MISO
NC
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21.5 I/O Lines Description
21.6 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
21.6.1 I/O Lines
The pins used for interfacing the compliant external devices may be multiplexed with I/O lines.
The user must first configure the I/O Controller to assign the SPI pins to their peripheral
functions.
21.6.2 Clocks
The clock for the SPI bus interface (CLK_SPI) is generated by the Power Manager. This clock is
enabled at reset, and can be disabled in the Power Manager. It is recommended to disable the
SPI before disabling the clock, to avoid freezing the SPI in an undefined state.
21.6.3 Interrupts
The SPI interrupt request line is connected to the interrupt controller. Using the SPI interrupt
requires the interrupt controller to be programmed first.
21.7 Functional Description
21.7.1 Modes of Operation
The SPI operates in master mode or in slave mode.
Operation in master mode is configured by writing a one to the Master/Slave Mode bit in the
Mode Register (MR.MSTR). The pins NPCS0 to NPCS3 are all configured as outputs, the SPCK
pin is driven, the MISO line is wired on the receiver input and the MOSI line driven as an output
by the transmitter.
If the MR.MSTR bit is written to zero, the SPI operates in slave mode. The MISO line is driven by
the transmitter output, the MOSI line is wired on the receiver input, the SPCK pin is driven by the
transmitter to synchronize the receiver. The NPCS0 pin becomes an input, and is used as a
Slave Select signal (NSS). The pins NPCS1 to NPCS3 are not driven and can be used for other
purposes.
The data transfers are identically programmable for both modes of operations. The baud rate
generator is activated only in master mode.
Table 21-1. I/O Lines Description
Pin Name Pin Description
Type
Master Slave
MISO Master In Slave Out Input Output
MOSI Master Out Slave In Output Input
SPCK Serial Clock Output Input
NPCS1-NPCS3 Peripheral Chip Selects Output Unused
NPCS0/NSS Peripheral Chip Select/Slave Select Output Input
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21.7.2 Data Transfer
Four combinations of polarity and phase are available for data transfers. The clock polarity is
configured with the Clock Polarity bit in the Chip Select Registers (CSRn.CPOL). The clock
phase is configured with the Clock Phase bit in the CSRn registers (CSRn.NCPHA). These two
bits determine the edges of the clock signal on which data is driven and sampled. Each of the
two bits has two possible states, resulting in four possible combinations that are incompatible
with one another. Thus, a master/slave pair must use the same parameter pair values to communicate.
If multiple slaves are used and fixed in different configurations, the master must
reconfigure itself each time it needs to communicate with a different slave.
Table 21-2 on page 489 shows the four modes and corresponding parameter settings.
Figure 21-3 on page 489 and Figure 21-4 on page 490 show examples of data transfers.
Figure 21-3. SPI Transfer Format (NCPHA = 1, 8 bits per transfer)
Table 21-2. SPI modes
SPI Mode CPOL NCPHA
0 01
1 00
2 11
3 10
SPCK cycle (for reference) 1 4 2 3 5 8 6 7
SPCK
(CPOL = 0)
NSS
(to slave)
MISO
(from slave)
MOSI
(from master)
SPCK
(CPOL = 1)
MSB 6 4 5 LSB 3 2 1
MSB 6 5 4 3 2 1 LSB ***
*** Not Defined, but normaly MSB of previous character received
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Figure 21-4. SPI Transfer Format (NCPHA = 0, 8 bits per transfer)
21.7.3 Master Mode Operations
When configured in master mode, the SPI uses the internal programmable baud rate generator
as clock source. It fully controls the data transfers to and from the slave(s) connected to the SPI
bus. The SPI drives the chip select line to the slave and the serial clock signal (SPCK).
The SPI features two holding registers, the Transmit Data Register (TDR) and the Receive Data
Register (RDR), and a single Shift Register. The holding registers maintain the data flow at a
constant rate.
After enabling the SPI, a data transfer begins when the processor writes to the TDR register.
The written data is immediately transferred in the Shift Register and transfer on the SPI bus
starts. While the data in the Shift Register is shifted on the MOSI line, the MISO line is sampled
and shifted in the Shift Register. Transmission cannot occur without reception.
Before writing to the TDR, the Peripheral Chip Select field in TDR (TDR.PCS) must be written in
order to select a slave.
If new data is written to TDR during the transfer, it stays in it until the current transfer is completed.
Then, the received data is transferred from the Shift Register to RDR, the data in TDR is
loaded in the Shift Register and a new transfer starts.
The transfer of a data written in TDR in the Shift Register is indicated by the Transmit Data Register
Empty bit in the Status Register (SR.TDRE). When new data is written in TDR, this bit is
cleared. The SR.TDRE bit is used to trigger the Transmit Peripheral DMA Controller channel.
The end of transfer is indicated by the Transmission Registers Empty bit in the SR register
(SR.TXEMPTY). If a transfer delay (CSRn.DLYBCT) is greater than zero for the last transfer,
SR.TXEMPTY is set after the completion of said delay. The CLK_SPI can be switched off at this
time.
During reception, received data are transferred from the Shift Register to the reception FIFO.
The FIFO can contain up to 4 characters (both Receive Data and Peripheral Chip Select fields).
While a character of the FIFO is unread, the Receive Data Register Full bit in SR remains high
(SR.RDRF). Characters are read through the RDR register. If the four characters stored in the
FIFO are not read and if a new character is stored, this sets the Overrun Error Status bit in the
SR register (SR.OVRES). The procedure to follow in such a case is described in Section
21.7.3.8.
SPCK cycle (for reference) 1 4 2 3 5 8 6 7
SPCK
(CPOL = 0)
NSS
(to slave)
MISO
(from slave)
MOSI
(from master)
SPCK
(CPOL = 1)
MSB 6 4 5 LSB 3 2 1
6 5 4 3 2 1 LSB
*** Not Defined, but normaly LSB of previous character transmitted
*** MSB
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Figure 21-5 on page 491shows a block diagram of the SPI when operating in master mode. Figure
21-6 on page 492 shows a flow chart describing how transfers are handled.
21.7.3.1 Master mode block diagram
Figure 21-5. Master Mode Block Diagram
Baud Rate Generator
RXFIFOEN
4 – Character FIFO
Shift Register
TDRE
RXFIFOEN
4 – Character FIFO
PS
PCSDEC
Current
Peripheral
MODF
MODFDIS
MSTR
SCBR
CSR0..3
CSR0..3
CPOL
NCPHA
BITS
RDR
RD
RDRF
OVRES
TD
TDR
RDR
CSAAT
CSNAAT
CSR0..3
PCS
MR
PCS
TDR
SPCK CLK_SPI
MISO MOSI LSB MSB
NPCS1
NPCS2
NPCS3
NPCS0
SPI
Clock
0
1
0
1
0
1
NPCS0
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21.7.3.2 Master mode flow diagram
Figure 21-6. Master Mode Flow Diagram
SPI Enable
CSAAT ?
PS ?
1
0
0
1
1
NPCS = TDR(PCS) NPCS = MR(PCS)
Delay DLYBS
Serializer = TDR(TD)
TDRE = 1
Data Transfer
RDR(RD) = Serializer
RDRF = 1
TDRE ?
NPCS = 0xF
Delay DLYBCS
Fixed
peripheral
Variable
peripheral
Delay DLYBCT
0
1 CSAAT ?
0
TDRE ?
1
0
PS ?
0
1
TDR(PCS)
= NPCS ?
no
yes MR(PCS)
= NPCS ?
no
NPCS = 0xF
Delay DLYBCS
NPCS = TDR(PCS)
NPCS = 0xF
Delay DLYBCS
NPCS = MR(PCS),
TDR(PCS)
Fixed
peripheral
Variable
peripheral
- NPCS defines the current Chip Select
- CSAAT, DLYBS, DLYBCT refer to the fields of the
Chip Select Register corresponding to the Current Chip Select
- When NPCS is 0xF, CSAAT is 0.
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21.7.3.3 Clock generation
The SPI Baud rate clock is generated by dividing the CLK_SPI , by a value between 1 and 255.
This allows a maximum operating baud rate at up to CLK_SPI and a minimum operating baud
rate of CLK_SPI divided by 255.
Writing the Serial Clock Baud Rate field in the CSRn registers (CSRn.SCBR) to zero is forbidden.
Triggering a transfer while CSRn.SCBR is zero can lead to unpredictable results.
At reset, CSRn.SCBR is zero and the user has to configure it at a valid value before performing
the first transfer.
The divisor can be defined independently for each chip select, as it has to be configured in the
CSRn.SCBR field. This allows the SPI to automatically adapt the baud rate for each interfaced
peripheral without reprogramming.
21.7.3.4 Transfer delays
Figure 21-7 on page 493 shows a chip select transfer change and consecutive transfers on the
same chip select. Three delays can be configured to modify the transfer waveforms:
• The delay between chip selects, programmable only once for all the chip selects by writing to
the Delay Between Chip Selects field in the MR register (MR.DLYBCS). Allows insertion of a
delay between release of one chip select and before assertion of a new one.
• The delay before SPCK, independently programmable for each chip select by writing the
Delay Before SPCK field in the CSRn registers (CSRn.DLYBS). Allows the start of SPCK to
be delayed after the chip select has been asserted.
• The delay between consecutive transfers, independently programmable for each chip select
by writing the Delay Between Consecutive Transfers field in the CSRn registers
(CSRn.DLYBCT). Allows insertion of a delay between two transfers occurring on the same
chip select
These delays allow the SPI to be adapted to the interfaced peripherals and their speed and bus
release time.
Figure 21-7. Programmable Delays
DLYBCS DLYBS DLYBCT DLYBCT
Chip Select 1
Chip Select 2
SPCK
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21.7.3.5 Peripheral selection
The serial peripherals are selected through the assertion of the NPCS0 to NPCS3 signals. By
default, all the NPCS signals are high before and after each transfer.
The peripheral selection can be performed in two different ways:
• Fixed Peripheral Select: SPI exchanges data with only one peripheral
• Variable Peripheral Select: Data can be exchanged with more than one peripheral
Fixed Peripheral Select is activated by writing a zero to the Peripheral Select bit in MR (MR.PS).
In this case, the current peripheral is defined by the MR.PCS field and the TDR.PCS field has no
effect.
Variable Peripheral Select is activated by writing a one to the MR.PS bit . The TDR.PCS field is
used to select the current peripheral. This means that the peripheral selection can be defined for
each new data.
The Fixed Peripheral Selection allows buffer transfers with a single peripheral. Using the Peripheral
DMA Controller is an optimal means, as the size of the data transfer between the memory
and the SPI is either 4 bits or 16 bits. However, changing the peripheral selection requires the
Mode Register to be reprogrammed.
The Variable Peripheral Selection allows buffer transfers with multiple peripherals without reprogramming
the MR register. Data written to TDR is 32-bits wide and defines the real data to be
transmitted and the peripheral it is destined to. Using the Peripheral DMA Controller in this mode
requires 32-bit wide buffers, with the data in the LSBs and the PCS and LASTXFER fields in the
MSBs, however the SPI still controls the number of bits (8 to16) to be transferred through MISO
and MOSI lines with the CSRn registers. This is not the optimal means in term of memory size
for the buffers, but it provides a very effective means to exchange data with several peripherals
without any intervention of the processor.
21.7.3.6 Peripheral chip select decoding
The user can configure the SPI to operate with up to 15 peripherals by decoding the four Chip
Select lines, NPCS0 to NPCS3 with an external logic. This can be enabled by writing a one to
the Chip Select Decode bit in the MR register (MR.PCSDEC).
When operating without decoding, the SPI makes sure that in any case only one chip select line
is activated, i.e. driven low at a time. If two bits are defined low in a PCS field, only the lowest
numbered chip select is driven low.
When operating with decoding, the SPI directly outputs the value defined by the PCS field of
either the MR register or the TDR register (depending on PS).
As the SPI sets a default value of 0xF on the chip select lines (i.e. all chip select lines at one)
when not processing any transfer, only 15 peripherals can be decoded.
The SPI has only four Chip Select Registers, not 15. As a result, when decoding is activated,
each chip select defines the characteristics of up to four peripherals. As an example, the CRS0
register defines the characteristics of the externally decoded peripherals 0 to 3, corresponding to
the PCS values 0x0 to 0x3. Thus, the user has to make sure to connect compatible peripherals
on the decoded chip select lines 0 to 3, 4 to 7, 8 to 11 and 12 to 14.
21.7.3.7 Peripheral deselection
When operating normally, as soon as the transfer of the last data written in TDR is completed,
the NPCS lines all rise. This might lead to runtime error if the processor is too long in responding
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to an interrupt, and thus might lead to difficulties for interfacing with some serial peripherals
requiring the chip select line to remain active during a full set of transfers.
To facilitate interfacing with such devices, the CSRn registers can be configured with the Chip
Select Active After Transfer bit written to one (CSRn.CSAAT) . This allows the chip select lines
to remain in their current state (low = active) until transfer to another peripheral is required.
When the CSRn.CSAAT bit is written to qero, the NPCS does not rise in all cases between two
transfers on the same peripheral. During a transfer on a Chip Select, the SR.TDRE bit rises as
soon as the content of the TDR is transferred into the internal shifter. When this bit is detected
the TDR can be reloaded. If this reload occurs before the end of the current transfer and if the
next transfer is performed on the same chip select as the current transfer, the Chip Select is not
de-asserted between the two transfers. This might lead to difficulties for interfacing with some
serial peripherals requiring the chip select to be de-asserted after each transfer. To facilitate
interfacing with such devices, the CSRn registers can be configured with the Chip Select Not
Active After Transfer bit (CSRn.CSNAAT) written to one. This allows to de-assert systematically
the chip select lines during a time DLYBCS. (The value of the CSRn.CSNAAT bit is taken into
account only if the CSRn.CSAAT bit is written to zero for the same Chip Select).
Figure 21-8 on page 496 shows different peripheral deselection cases and the effect of the
CSRn.CSAAT and CSRn.CSNAAT bits.
21.7.3.8 FIFO management
A FIFO has been implemented in Reception FIFO (both in master and in slave mode), in order to
be able to store up to 4 characters without causing an overrun error. If an attempt is made to
store a fifth character, an overrun error rises. If such an event occurs, the FIFO must be flushed.
There are two ways to Flush the FIFO:
• By performing four read accesses of the RDR (the data read must be ignored)
• By writing a one to the Flush Fifo Command bit in the CR register (CR.FLUSHFIFO).
After that, the SPI is able to receive new data.
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Figure 21-8. Peripheral Deselection
Figure 21-8 on page 496 shows different peripheral deselection cases and the effect of the
CSRn.CSAAT and CSRn.CSNAAT bits.
21.7.3.9 Mode fault detection
The SPI is capable of detecting a mode fault when it is configured in master mode and NPCS0,
MOSI, MISO, and SPCK are configured as open drain through the I/O Controller with either
internal or external pullup resistors. If the I/O Controller does not have open-drain capability,
mode fault detection must be disabled by writing a one to the Mode Fault Detection bit in the MR
A
NPCS[0..3]
Write TDR
TDRE
NPCS[0..3]
Write TDR
TDRE
NPCS[0..3]
Write TDR
TDRE
DLYBCS
PCS = A
DLYBCS
DLYBCT
A
PCS = B
B
DLYBCS
PCS = A
DLYBCS
DLYBCT
A
PCS = B
B
DLYBCS
DLYBCT
PCS=A
A
DLYBCS
DLYBCT
A
PCS = A
A A
DLYBCT
A A
CSAAT = 0 and CSNAAT = 0
DLYBCT
A A
CSAAT = 1 and CSNAAT= 0 / 1
A
DLYBCS
PCS = A
DLYBCT
A A
CSAAT = 0 and CSNAAT = 1
NPCS[0..3]
Write TDR
TDRE
PCS = A
DLYBCT
A A
CSAAT = 0 and CSNAAT = 0
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register (MR.MODFDIS). In systems with open-drain I/O lines, a mode fault is detected when a
low level is driven by an external master on the NPCS0/NSS signal.
When a mode fault is detected, the Mode Fault Error bit in the SR (SR.MODF) is set until the SR
is read and the SPI is automatically disabled until re-enabled by writing a one to the SPI Enable
bit in the CR register (CR.SPIEN).
By default, the mode fault detection circuitry is enabled. The user can disable mode fault detection
by writing a one to the Mode Fault Detection bit in the MR register (MR.MODFDIS).
21.7.4 SPI Slave Mode
When operating in slave mode, the SPI processes data bits on the clock provided on the SPI
clock pin (SPCK).
The SPI waits for NSS to go active before receiving the serial clock from an external master.
When NSS falls, the clock is validated on the serializer, which processes the number of bits
defined by the Bits Per Transfer field of the Chip Select Register 0 (CSR0.BITS). These bits are
processed following a phase and a polarity defined respectively by the CSR0.NCPHA and
CSR0.CPOL bits. Note that the BITS, CPOL, and NCPHA bits of the other Chip Select Registers
have no effect when the SPI is configured in Slave Mode.
The bits are shifted out on the MISO line and sampled on the MOSI line.
When all the bits are processed, the received data is transferred in the Receive Data Register
and the SR.RDRF bit rises. If the RDR register has not been read before new data is received,
the SR.OVRES bit is set. Data is loaded in RDR even if this flag is set. The user has to read the
SR register to clear the SR.OVRES bit.
When a transfer starts, the data shifted out is the data present in the Shift Register. If no data
has been written in the TDR register, the last data received is transferred. If no data has been
received since the last reset, all bits are transmitted low, as the Shift Register resets to zero.
When a first data is written in TDR, it is transferred immediately in the Shift Register and the
SR.TDRE bit rises. If new data is written, it remains in TDR until a transfer occurs, i.e. NSS falls
and there is a valid clock on the SPCK pin. When the transfer occurs, the last data written in
TDR is transferred in the Shift Register and the SR.TDRE bit rises. This enables frequent
updates of critical variables with single transfers.
Then, a new data is loaded in the Shift Register from the TDR. In case no character is ready to
be transmitted, i.e. no character has been written in TDR since the last load from TDR to the
Shift Register, the Shift Register is not modified and the last received character is retransmitted.
In this case the Underrun Error Status bit is set in SR (SR.UNDES).
Figure 21-9 on page 498 shows a block diagram of the SPI when operating in slave mode.
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Figure 21-9. Slave Mode Functional Block Diagram
Shift Register
SPCK
SPIENS
LSB MSB
NSS
MOSI
SPI
Clock
TDRE
TDR
TD
RDRF
OVRES
CSR0
CPOL
NCPHA
BITS
SPIEN
SPIDIS
MISO
UNDES
RDR
RD
4 - Character FIFO
0
1
RXFIFOEN
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21.8 User Interface
Note: 1. The reset values are device specific. Please refer to the Module Configuration section at the end of this chapter.
Table 21-3. SPI Register Memory Map
Offset Register Register Name Access Reset
0x00 Control Register CR Write-only 0x00000000
0x04 Mode Register MR Read/Write 0x00000000
0x08 Receive Data Register RDR Read-only 0x00000000
0x0C Transmit Data Register TDR Write-only 0x00000000
0x10 Status Register SR Read-only 0x00000000
0x14 Interrupt Enable Register IER Write-only 0x00000000
0x18 Interrupt Disable Register IDR Write-only 0x00000000
0x1C Interrupt Mask Register IMR Read-only 0x00000000
0x30 Chip Select Register 0 CSR0 Read/Write 0x00000000
0x34 Chip Select Register 1 CSR1 Read/Write 0x00000000
0x38 Chip Select Register 2 CSR2 Read/Write 0x00000000
0x3C Chip Select Register 3 CSR3 Read/Write 0x00000000
0x E4 Write Protection Control Register WPCR Read/Write 0X00000000
0xE8 Write Protection Status Register WPSR Read-only 0x00000000
0xF8 Features Register FEATURES Read-only - (1)
0xFC Version Register VERSION Read-only - (1)
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21.8.1 Control Register
Name: CR
Access Type: Write-only
Offset: 0x00
Reset Value: 0x00000000
• LASTXFER: Last Transfer
1: The current NPCS will be deasserted after the character written in TD has been transferred. When CSRn.CSAAT is one, this
allows to close the communication with the current serial peripheral by raising the corresponding NPCS line as soon as TD
transfer has completed.
0: Writing a zero to this bit has no effect.
• FLUSHFIFO: Flush Fifo Command
1: If The FIFO Mode is enabled (MR.FIFOEN written to one) and if an overrun error has been detected, this command allows to
empty the FIFO.
0: Writing a zero to this bit has no effect.
• SWRST: SPI Software Reset
1: Writing a one to this bit will reset the SPI. A software-triggered hardware reset of the SPI interface is performed. The SPI is in
slave mode after software reset. Peripheral DMA Controller channels are not affected by software reset.
0: Writing a zero to this bit has no effect.
• SPIDIS: SPI Disable
1: Writing a one to this bit will disable the SPI. As soon as SPIDIS is written to one, the SPI finishes its transfer, all pins are set
in input mode and no data is received or transmitted. If a transfer is in progress, the transfer is finished before the SPI is
disabled. If both SPIEN and SPIDIS are equal to one when the CR register is written, the SPI is disabled.
0: Writing a zero to this bit has no effect.
• SPIEN: SPI Enable
1: Writing a one to this bit will enable the SPI to transfer and receive data.
0: Writing a zero to this bit has no effect.
31 30 29 28 27 26 25 24
- - - - - - - LASTXFER
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - - - FLUSHFIFO
76543210
SWRST - - - - - SPIDIS SPIEN
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21.8.2 Mode Register
Name: MR
Access Type: Read/Write
Offset: 0x04
Reset Value: 0x00000000
• DLYBCS: Delay Between Chip Selects
This field defines the delay from NPCS inactive to the activation of another NPCS. The DLYBCS time guarantees nonoverlapping
chip selects and solves bus contentions in case of peripherals having long data float times.
If DLYBCS is less than or equal to six, six CLK_SPI periods will be inserted by default.
Otherwise, the following equation determines the delay:
• PCS: Peripheral Chip Select
This field is only used if Fixed Peripheral Select is active (PS = 0).
If PCSDEC = 0:
PCS = xxx0NPCS[3:0] = 1110
PCS = xx01NPCS[3:0] = 1101
PCS = x011NPCS[3:0] = 1011
PCS = 0111NPCS[3:0] = 0111
PCS = 1111forbidden (no peripheral is selected)
(x = don’t care)
If PCSDEC = 1:
NPCS[3:0] output signals = PCS.
• LLB: Local Loopback Enable
1: Local loopback path enabled. LLB controls the local loopback on the data serializer for testing in master mode only (MISO is
internally connected on MOSI).
0: Local loopback path disabled.
• RXFIFOEN: FIFO in Reception Enable
1: The FIFO is used in reception (four characters can be stored in the SPI).
31 30 29 28 27 26 25 24
DLYBCS
23 22 21 20 19 18 17 16
- - - - PCS
15 14 13 12 11 10 9 8
--------
76543210
LLB RXFIFOEN - MODFDIS - PCSDEC PS MSTR
Delay Between Chip Selects DLYBCS
CLKSPI = -----------------------
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0: The FIFO is not used in reception (only one character can be stored in the SPI).
• MODFDIS: Mode Fault Detection
1: Mode fault detection is disabled. If the I/O controller does not have open-drain capability, mode fault detection must be
disabled for proper operation of the SPI.
0: Mode fault detection is enabled.
• PCSDEC: Chip Select Decode
0: The chip selects are directly connected to a peripheral device.
1: The four chip select lines are connected to a 4- to 16-bit decoder.
When PCSDEC equals one, up to 15 Chip Select signals can be generated with the four lines using an external 4- to 16-bit
decoder. The CSRn registers define the characteristics of the 15 chip selects according to the following rules:
CSR0 defines peripheral chip select signals 0 to 3.
CSR1 defines peripheral chip select signals 4 to 7.
CSR2 defines peripheral chip select signals 8 to 11.
CSR3 defines peripheral chip select signals 12 to 14.
• PS: Peripheral Select
1: Variable Peripheral Select.
0: Fixed Peripheral Select.
• MSTR: Master/Slave Mode
1: SPI is in master mode.
0: SPI is in slave mode.
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21.8.3 Receive Data Register
Name: RDR
Access Type: Read-only
Offset: 0x08
Reset Value: 0x00000000
• RD: Receive Data
Data received by the SPI Interface is stored in this register right-justified. Unused bits read zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
RD[15:8]
76543210
RD[7:0]
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21.8.4 Transmit Data Register
Name: TDR
Access Type: Write-only
Offset: 0x0C
Reset Value: 0x00000000
• LASTXFER: Last Transfer
1: The current NPCS will be deasserted after the character written in TD has been transferred. When CSRn.CSAAT is one, this
allows to close the communication with the current serial peripheral by raising the corresponding NPCS line as soon as TD
transfer has completed.
0: Writing a zero to this bit has no effect.
This field is only used if Variable Peripheral Select is active (MR.PS = 1).
• PCS: Peripheral Chip Select
If PCSDEC = 0:
PCS = xxx0NPCS[3:0] = 1110
PCS = xx01NPCS[3:0] = 1101
PCS = x011NPCS[3:0] = 1011
PCS = 0111NPCS[3:0] = 0111
PCS = 1111forbidden (no peripheral is selected)
(x = don’t care)
If PCSDEC = 1:
NPCS[3:0] output signals = PCS
This field is only used if Variable Peripheral Select is active (MR.PS = 1).
• TD: Transmit Data
Data to be transmitted by the SPI Interface is stored in this register. Information to be transmitted must be written to the TDR
register in a right-justified format.
31 30 29 28 27 26 25 24
- - - - - - - LASTXFER
23 22 21 20 19 18 17 16
- - - - PCS
15 14 13 12 11 10 9 8
TD[15:8]
76543210
TD[7:0]
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21.8.5 Status Register
Name: SR
Access Type: Read-only
Offset: 0x10
Reset Value: 0x00000000
• SPIENS: SPI Enable Status
1: This bit is set when the SPI is enabled.
0: This bit is cleared when the SPI is disabled.
• UNDES: Underrun Error Status (Slave Mode Only)
1: This bit is set when a transfer begins whereas no data has been loaded in the TDR register.
0: This bit is cleared when the SR register is read.
• TXEMPTY: Transmission Registers Empty
1: This bit is set when TDR and internal shifter are empty. If a transfer delay has been defined, TXEMPTY is set after the
completion of such delay.
0: This bit is cleared as soon as data is written in TDR.
• NSSR: NSS Rising
1: A rising edge occurred on NSS pin since last read.
0: This bit is cleared when the SR register is read.
• OVRES: Overrun Error Status
1: This bit is set when an overrun has occurred. An overrun occurs when RDR is loaded at least twice from the serializer since
the last read of the RDR.
0: This bit is cleared when the SR register is read.
• MODF: Mode Fault Error
1: This bit is set when a Mode Fault occurred.
0: This bit is cleared when the SR register is read.
• TDRE: Transmit Data Register Empty
1: This bit is set when the last data written in the TDR register has been transferred to the serializer.
0: This bit is cleared when data has been written to TDR and not yet transferred to the serializer.
TDRE equals zero when the SPI is disabled or at reset. The SPI enable command sets this bit to one.
• RDRF: Receive Data Register Full
1: Data has been received and the received data has been transferred from the serializer to RDR since the last read of RDR.
0: No data has been received since the last read of RDR
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - - - - SPIENS
15 14 13 12 11 10 9 8
- - - - - UNDES TXEMPTY NSSR
76543210
- - - - OVRES MODF TDRE RDRF
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21.8.6 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x14
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - UNDES TXEMPTY NSSR
76543210
- - - - OVRES MODF TDRE RDRF
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21.8.7 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x18
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - UNDES TXEMPTY NSSR
76543210
- - - - OVRES MODF TDRE RDRF
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21.8.8 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x1C
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - UNDES TXEMPTY NSSR
76543210
- - - - OVRES MODF TDRE RDRF
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21.8.9 Chip Select Register 0
Name: CSR0
Access Type: Read/Write
Offset: 0x30
Reset Value: 0x00000000
• DLYBCT: Delay Between Consecutive Transfers
This field defines the delay between two consecutive transfers with the same peripheral without removing the chip select. The
delay is always inserted after each transfer and before removing the chip select if needed.
When DLYBCT equals zero, no delay between consecutive transfers is inserted and the clock keeps its duty cycle over the
character transfers.
Otherwise, the following equation determines the delay:
• DLYBS: Delay Before SPCK
This field defines the delay from NPCS valid to the first valid SPCK transition.
When DLYBS equals zero, the NPCS valid to SPCK transition is 1/2 the SPCK clock period.
Otherwise, the following equations determine the delay:
• SCBR: Serial Clock Baud Rate
In Master Mode, the SPI Interface uses a modulus counter to derive the SPCK baud rate from the CLK_SPI. The Baud rate is
selected by writing a value from 1 to 255 in the SCBR field. The following equations determine the SPCK baud rate:
Writing the SCBR field to zero is forbidden. Triggering a transfer while SCBR is zero can lead to unpredictable results.
At reset, SCBR is zero and the user has to write it to a valid value before performing the first transfer.
If a clock divider (SCBRn) field is set to one and the other SCBR fields differ from one, access on CSn is correct but no correct
access will be possible on other CS.
31 30 29 28 27 26 25 24
DLYBCT
23 22 21 20 19 18 17 16
DLYBS
15 14 13 12 11 10 9 8
SCBR
76543210
BITS CSAAT CSNAAT NCPHA CPOL
Delay Between Consecutive Transfers 32 DLYBCT
CLKSPI = ------------------------------------
Delay Before SPCK DLYBS
CLKSPI = ---------------------
SPCK Baudrate CLKSPI
SCBR = ---------------------
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• BITS: Bits Per Transfer
The BITS field determines the number of data bits transferred. Reserved values should not be used.
• CSAAT: Chip Select Active After Transfer
1: The Peripheral Chip Select does not rise after the last transfer is achieved. It remains active until a new transfer is requested
on a different chip select.
0: The Peripheral Chip Select Line rises as soon as the last transfer is achieved.
• CSNAAT: Chip Select Not Active After Transfer (Ignored if CSAAT = 1)
0: The Peripheral Chip Select does not rise between two transfers if the TDR is reloaded before the end of the first transfer and
if the two transfers occur on the same Chip Select.
1: The Peripheral Chip Select rises systematically between each transfer performed on the same slave for a minimal duration of:
(if DLYBCT field is different from 0)
(if DLYBCT field equals 0)
• NCPHA: Clock Phase
1: Data is captured after the leading (inactive-to-active) edge of SPCK and changed on the trailing (active-to-inactive) edge of
SPCK.
0: Data is changed on the leading (inactive-to-active) edge of SPCK and captured after the trailing (active-to-inactive) edge of
SPCK.
NCPHA determines which edge of SPCK causes data to change and which edge causes data to be captured. NCPHA is used
with CPOL to produce the required clock/data relationship between master and slave devices.
• CPOL: Clock Polarity
1: The inactive state value of SPCK is logic level one.
0: The inactive state value of SPCK is logic level zero.
BITS Bits Per Transfer
0000 8
0001 9
0010 10
0011 11
0100 12
0101 13
0110 14
0111 15
1000 16
1001 4
1010 5
1011 6
1100 7
1101 Reserved
1110 Reserved
1111 Reserved
DLYBCS
CLKSPI
-----------------------
DLYBCS + 1
CLKSPI
--------------------------------
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CPOL is used to determine the inactive state value of the serial clock (SPCK). It is used with NCPHA to produce the required
clock/data relationship between master and slave devices.
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21.8.10 Chip Select Register 1
Name: CSR1
Access Type: Read/Write
Offset: 0x34
Reset Value: 0x00000000
• DLYBCT: Delay Between Consecutive Transfers
This field defines the delay between two consecutive transfers with the same peripheral without removing the chip select. The
delay is always inserted after each transfer and before removing the chip select if needed.
When DLYBCT equals zero, no delay between consecutive transfers is inserted and the clock keeps its duty cycle over the
character transfers.
Otherwise, the following equation determines the delay:
• DLYBS: Delay Before SPCK
This field defines the delay from NPCS valid to the first valid SPCK transition.
When DLYBS equals zero, the NPCS valid to SPCK transition is 1/2 the SPCK clock period.
Otherwise, the following equations determine the delay:
• SCBR: Serial Clock Baud Rate
In Master Mode, the SPI Interface uses a modulus counter to derive the SPCK baud rate from the CLK_SPI. The Baud rate is
selected by writing a value from 1 to 255 in the SCBR field. The following equations determine the SPCK baud rate:
Writing the SCBR field to zero is forbidden. Triggering a transfer while SCBR is zero can lead to unpredictable results.
At reset, SCBR is zero and the user has to write it to a valid value before performing the first transfer.
If a clock divider (SCBRn) field is set to one and the other SCBR fields differ from one, access on CSn is correct but no correct
access will be possible on other CS.
31 30 29 28 27 26 25 24
DLYBCT
23 22 21 20 19 18 17 16
DLYBS
15 14 13 12 11 10 9 8
SCBR
76543210
BITS CSAAT CSNAAT NCPHA CPOL
Delay Between Consecutive Transfers 32 DLYBCT
CLKSPI = ------------------------------------
Delay Before SPCK DLYBS
CLKSPI = ---------------------
SPCK Baudrate CLKSPI
SCBR = ---------------------
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• BITS: Bits Per Transfer
The BITS field determines the number of data bits transferred. Reserved values should not be used.
• CSAAT: Chip Select Active After Transfer
1: The Peripheral Chip Select does not rise after the last transfer is achieved. It remains active until a new transfer is requested
on a different chip select.
0: The Peripheral Chip Select Line rises as soon as the last transfer is achieved.
• CSNAAT: Chip Select Not Active After Transfer (Ignored if CSAAT = 1)
0: The Peripheral Chip Select does not rise between two transfers if the TDR is reloaded before the end of the first transfer and
if the two transfers occur on the same Chip Select.
1: The Peripheral Chip Select rises systematically between each transfer performed on the same slave for a minimal duration of:
(if DLYBCT field is different from 0)
(if DLYBCT field equals 0)
• NCPHA: Clock Phase
1: Data is captured after the leading (inactive-to-active) edge of SPCK and changed on the trailing (active-to-inactive) edge of
SPCK.
0: Data is changed on the leading (inactive-to-active) edge of SPCK and captured after the trailing (active-to-inactive) edge of
SPCK.
NCPHA determines which edge of SPCK causes data to change and which edge causes data to be captured. NCPHA is used
with CPOL to produce the required clock/data relationship between master and slave devices.
• CPOL: Clock Polarity
1: The inactive state value of SPCK is logic level one.
0: The inactive state value of SPCK is logic level zero.
BITS Bits Per Transfer
0000 8
0001 9
0010 10
0011 11
0100 12
0101 13
0110 14
0111 15
1000 16
1001 4
1010 5
1011 6
1100 7
1101 Reserved
1110 Reserved
1111 Reserved
DLYBCS
CLKSPI
-----------------------
DLYBCS + 1
CLKSPI
--------------------------------
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CPOL is used to determine the inactive state value of the serial clock (SPCK). It is used with NCPHA to produce the required
clock/data relationship between master and slave devices.
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21.8.11 Chip Select Register 2
Name: CSR2
Access Type: Read/Write
Offset: 0x38
Reset Value: 0x00000000
• DLYBCT: Delay Between Consecutive Transfers
This field defines the delay between two consecutive transfers with the same peripheral without removing the chip select. The
delay is always inserted after each transfer and before removing the chip select if needed.
When DLYBCT equals zero, no delay between consecutive transfers is inserted and the clock keeps its duty cycle over the
character transfers.
Otherwise, the following equation determines the delay:
• DLYBS: Delay Before SPCK
This field defines the delay from NPCS valid to the first valid SPCK transition.
When DLYBS equals zero, the NPCS valid to SPCK transition is 1/2 the SPCK clock period.
Otherwise, the following equations determine the delay:
• SCBR: Serial Clock Baud Rate
In Master Mode, the SPI Interface uses a modulus counter to derive the SPCK baud rate from the CLK_SPI. The Baud rate is
selected by writing a value from 1 to 255 in the SCBR field. The following equations determine the SPCK baud rate:
Writing the SCBR field to zero is forbidden. Triggering a transfer while SCBR is zero can lead to unpredictable results.
At reset, SCBR is zero and the user has to write it to a valid value before performing the first transfer.
If a clock divider (SCBRn) field is set to one and the other SCBR fields differ from one, access on CSn is correct but no correct
access will be possible on other CS.
31 30 29 28 27 26 25 24
DLYBCT
23 22 21 20 19 18 17 16
DLYBS
15 14 13 12 11 10 9 8
SCBR
76543210
BITS CSAAT CSNAAT NCPHA CPOL
Delay Between Consecutive Transfers 32 DLYBCT
CLKSPI = ------------------------------------
Delay Before SPCK DLYBS
CLKSPI = ---------------------
SPCK Baudrate CLKSPI
SCBR = ---------------------
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• BITS: Bits Per Transfer
The BITS field determines the number of data bits transferred. Reserved values should not be used.
• CSAAT: Chip Select Active After Transfer
1: The Peripheral Chip Select does not rise after the last transfer is achieved. It remains active until a new transfer is requested
on a different chip select.
0: The Peripheral Chip Select Line rises as soon as the last transfer is achieved.
• CSNAAT: Chip Select Not Active After Transfer (Ignored if CSAAT = 1)
0: The Peripheral Chip Select does not rise between two transfers if the TDR is reloaded before the end of the first transfer and
if the two transfers occur on the same Chip Select.
1: The Peripheral Chip Select rises systematically between each transfer performed on the same slave for a minimal duration of:
(if DLYBCT field is different from 0)
(if DLYBCT field equals 0)
• NCPHA: Clock Phase
1: Data is captured after the leading (inactive-to-active) edge of SPCK and changed on the trailing (active-to-inactive) edge of
SPCK.
0: Data is changed on the leading (inactive-to-active) edge of SPCK and captured after the trailing (active-to-inactive) edge of
SPCK.
NCPHA determines which edge of SPCK causes data to change and which edge causes data to be captured. NCPHA is used
with CPOL to produce the required clock/data relationship between master and slave devices.
• CPOL: Clock Polarity
1: The inactive state value of SPCK is logic level one.
0: The inactive state value of SPCK is logic level zero.
BITS Bits Per Transfer
0000 8
0001 9
0010 10
0011 11
0100 12
0101 13
0110 14
0111 15
1000 16
1001 4
1010 5
1011 6
1100 7
1101 Reserved
1110 Reserved
1111 Reserved
DLYBCS
CLKSPI
-----------------------
DLYBCS + 1
CLKSPI
--------------------------------
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CPOL is used to determine the inactive state value of the serial clock (SPCK). It is used with NCPHA to produce the required
clock/data relationship between master and slave devices.
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21.8.12 Chip Select Register 3
Name: CSR3
Access Type: Read/Write
Offset: 0x3C
Reset Value: 0x00000000
• DLYBCT: Delay Between Consecutive Transfers
This field defines the delay between two consecutive transfers with the same peripheral without removing the chip select. The
delay is always inserted after each transfer and before removing the chip select if needed.
When DLYBCT equals zero, no delay between consecutive transfers is inserted and the clock keeps its duty cycle over the
character transfers.
Otherwise, the following equation determines the delay:
• DLYBS: Delay Before SPCK
This field defines the delay from NPCS valid to the first valid SPCK transition.
When DLYBS equals zero, the NPCS valid to SPCK transition is 1/2 the SPCK clock period.
Otherwise, the following equations determine the delay:
• SCBR: Serial Clock Baud Rate
In Master Mode, the SPI Interface uses a modulus counter to derive the SPCK baud rate from the CLK_SPI. The Baud rate is
selected by writing a value from 1 to 255 in the SCBR field. The following equations determine the SPCK baud rate:
Writing the SCBR field to zero is forbidden. Triggering a transfer while SCBR is zero can lead to unpredictable results.
At reset, SCBR is zero and the user has to write it to a valid value before performing the first transfer.
If a clock divider (SCBRn) field is set to one and the other SCBR fields differ from one, access on CSn is correct but no correct
access will be possible on other CS.
31 30 29 28 27 26 25 24
DLYBCT
23 22 21 20 19 18 17 16
DLYBS
15 14 13 12 11 10 9 8
SCBR
76543210
BITS CSAAT CSNAAT NCPHA CPOL
Delay Between Consecutive Transfers 32 DLYBCT
CLKSPI = ------------------------------------
Delay Before SPCK DLYBS
CLKSPI = ---------------------
SPCK Baudrate CLKSPI
SCBR = ---------------------
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• BITS: Bits Per Transfer
The BITS field determines the number of data bits transferred. Reserved values should not be used.
• CSAAT: Chip Select Active After Transfer
1: The Peripheral Chip Select does not rise after the last transfer is achieved. It remains active until a new transfer is requested
on a different chip select.
0: The Peripheral Chip Select Line rises as soon as the last transfer is achieved.
• CSNAAT: Chip Select Not Active After Transfer (Ignored if CSAAT = 1)
0: The Peripheral Chip Select does not rise between two transfers if the TDR is reloaded before the end of the first transfer and
if the two transfers occur on the same Chip Select.
1: The Peripheral Chip Select rises systematically between each transfer performed on the same slave for a minimal duration of:
(if DLYBCT field is different from 0)
(if DLYBCT field equals 0)
• NCPHA: Clock Phase
1: Data is captured after the leading (inactive-to-active) edge of SPCK and changed on the trailing (active-to-inactive) edge of
SPCK.
0: Data is changed on the leading (inactive-to-active) edge of SPCK and captured after the trailing (active-to-inactive) edge of
SPCK.
NCPHA determines which edge of SPCK causes data to change and which edge causes data to be captured. NCPHA is used
with CPOL to produce the required clock/data relationship between master and slave devices.
• CPOL: Clock Polarity
1: The inactive state value of SPCK is logic level one.
0: The inactive state value of SPCK is logic level zero.
BITS Bits Per Transfer
0000 8
0001 9
0010 10
0011 11
0100 12
0101 13
0110 14
0111 15
1000 16
1001 4
1010 5
1011 6
1100 7
1101 Reserved
1110 Reserved
1111 Reserved
DLYBCS
CLKSPI
-----------------------
DLYBCS + 1
CLKSPI
--------------------------------
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CPOL is used to determine the inactive state value of the serial clock (SPCK). It is used with NCPHA to produce the required
clock/data relationship between master and slave devices.
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21.8.13 Write Protection Control Register
Register Name: WPCR
Access Type: Read-write
Offset: 0xE4
Reset Value: 0x00000000
• SPIWPKEY: SPI Write Protection Key Password
If a value is written in SPIWPEN, the value is taken into account only if SPIWPKEY is written with “SPI” (SPI written in ASCII
Code, i.e. 0x535049 in hexadecimal).
• SPIWPEN: SPI Write Protection Enable
1: The Write Protection is Enabled
0: The Write Protection is Disabled
31 30 29 28 27 26 25 24
SPIWPKEY[23:16]
23 22 21 20 19 18 17 16
SPIWPKEY[15:8]
15 14 13 12 11 10 9 8
SPIWPKEY[7:0]
76543210
- - - - - - - SPIWPEN
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21.8.14 Write Protection Status Register
Register Name: WPSR
Access Type: Read-only
Offset: 0xE8
Reset Value: 0x00000000
• SPIWPVSRC: SPI Write Protection Violation Source
This Field indicates the Peripheral Bus Offset of the register concerned by the violation (MR or CSRx)
• SPIWPVS: SPI Write Protection Violation Status
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
SPIWPVSRC
76543210
- - - - - SPIWPVS
SPIWPVS value Violation Type
1 The Write Protection has blocked a Write access to a protected register (since the last read).
2 Software Reset has been performed while Write Protection was enabled (since the last read
or since the last write access on MR, IER, IDR or CSRx).
3 Both Write Protection violation and software reset with Write Protection enabled have
occurred since the last read.
4 Write accesses have been detected on MR (while a chip select was active) or on CSRi (while
the Chip Select “i” was active) since the last read.
5
The Write Protection has blocked a Write access to a protected register and write accesses
have been detected on MR (while a chip select was active) or on CSRi (while the Chip Select
“i” was active) since the last read.
6
Software Reset has been performed while Write Protection was enabled (since the last read
or since the last write access on MR, IER, IDR or CSRx) and some write accesses have been
detected on MR (while a chip select was active) or on CSRi (while the Chip Select “i” was
active) since the last read.
7
- The Write Protection has blocked a Write access to a protected register.
and
- Software Reset has been performed while Write Protection was enabled.
and
- Write accesses have been detected on MR (while a chip select was active) or on CSRi
(while the Chip Select “i” was active) since the last read.
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21.8.15 Features Register
Register Name: FEATURES
Access Type: Read-only
Offset: 0xF8
Reset Value: –
• SWIMPL: Spurious Write Protection Implemented
0: Spurious write protection is not implemented.
1: Spurious write protection is implemented.
• FIFORIMPL: FIFO in Reception Implemented
0: FIFO in reception is not implemented.
1: FIFO in reception is implemented.
• BRPBHSB: Bridge Type is PB to HSB
0: Bridge type is not PB to HSB.
1: Bridge type is PB to HSB.
• CSNAATIMPL: CSNAAT Features Implemented
0: CSNAAT (Chip select not active after transfer) features are not implemented.
1: CSNAAT features are implemented.
• EXTDEC: External Decoder True
0: External decoder capability is not implemented.
1: External decoder capability is implemented.
• LENNCONF: Character Length if not Configurable
If the character length is not configurable, this field specifies the fixed character length.
• LENCONF: Character Length Configurable
0: The character length is not configurable.
1: The character length is configurable.
• PHZNCONF: Phase is Zero if Phase not Configurable
0: If phase is not configurable, phase is non-zero.
1: If phase is not configurable, phase is zero.
• PHCONF: Phase Configurable
0: Phase is not configurable.
1: Phase is configurable.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - SWIMPL FIFORIMPL BRPBHSB CSNAATIMPL EXTDEC
15 14 13 12 11 10 9 8
LENNCONF LENCONF
76543210
PHZNCONF PHCONF PPNCONF PCONF NCS
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• PPNCONF: Polarity Positive if Polarity not Configurable
0: If polarity is not configurable, polarity is negative.
1: If polarity is not configurable, polarity is positive.
• PCONF: Polarity Configurable
0: Polarity is not configurable.
1: Polarity is configurable.
• NCS: Number of Chip Selects
This field indicates the number of chip selects implemented.
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21.8.16 Version Register
Register Name: VERSION
Access Type: Read-only
Offset: 0xFC
Reset Value: –
• MFN
Reserved. No functionality associated.
• VERSION
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - MFN
15 14 13 12 11 10 9 8
VERSION[11:8]
76543210
VERSION[7:0]
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21.9 Module Configuration
The specific configuration for each SPI instance is listed in the following tables.The module bus
clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 21-4. SPI Clock Name
Module Name Clock Name Description
SPI CLK_SPI Clock for the SPI bus interface
Table 21-5.
Register Reset Value
FEATURES 0x001F0154
VERSION 0x00000211
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22. Two-wire Master Interface (TWIM)
Rev.: 1.1.0.1
22.1 Features
• Compatible with I²C standard
– Multi-master support
– Transfer speeds of 100 and 400 kbit/s
– 7- and 10-bit and General Call addressing
• Compatible with SMBus standard
– Hardware Packet Error Checking (CRC) generation and verification with ACK control
– SMBus ALERT interface
– 25 ms clock low timeout delay
– 10 ms master cumulative clock low extend time
– 25 ms slave cumulative clock low extend time
• Compatible with PMBus
• Compatible with Atmel Two-wire Interface Serial Memories
• DMA interface for reducing CPU load
• Arbitrary transfer lengths, including 0 data bytes
• Optional clock stretching if transmit or receive buffers not ready for data transfer
22.2 Overview
The Atmel Two-wire Master Interface (TWIM) interconnects components on a unique two-wire
bus, made up of one clock line and one data line with speeds of up to 400 kbit/s, based on a
byte-oriented transfer format. It can be used with any Atmel Two-wire Interface bus serial
EEPROM and I²C compatible device such as a real time clock (RTC), dot matrix/graphic LCD
controller, and temperature sensor, to name a few. The TWIM is always a bus master and can
transfer sequential or single bytes. Multiple master capability is supported. Arbitration of the bus
is performed internally and relinquishes the bus automatically if the bus arbitration is lost.
A configurable baud rate generator permits the output data rate to be adapted to a wide range of
core clock frequencies.Table 22-1 lists the compatibility level of the Atmel Two-wire Interface in
Master Mode and a full I²C compatible device.
Note: 1. START + b000000001 + Ack + Sr
Table 22-1. Atmel TWIM Compatibility with I²C Standard
I²C Standard Atmel TWIM
Standard-mode (100 kbit/s) Supported
Fast-mode (400 kbit/s) Supported
Fast-mode Plus (1 Mbit/s) Supported
7- or 10-bits Slave Addressing Supported
START BYTE(1) Not Supported
Repeated Start (Sr) Condition Supported
ACK and NACK Management Supported
Slope Control and Input Filtering (Fast mode) Supported
Clock Stretching Supported
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Table 22-2 lists the compatibility level of the Atmel Two-wire Master Interface and a full SMBus
compatible master.
22.3 List of Abbreviations
22.4 Block Diagram
Figure 22-1. Block Diagram
Table 22-2. Atmel TWIM Compatibility with SMBus Standard
SMBus Standard Atmel TWIM
Bus Timeouts Supported
Address Resolution Protocol Supported
Alert Supported
Host Functionality Supported
Packet Error Checking Supported
Table 22-3. Abbreviations
Abbreviation Description
TWI Two-wire Interface
A Acknowledge
NA Non Acknowledge
P Stop
S Start
Sr Repeated Start
SADR Slave Address
ADR Any address except SADR
R Read
W Write
Peripheral
Bus Bridge
Two-wire
Interface
I/O Controller
TWCK
TWD
INTC
TWI Interrupt
Power
Manager
CLK_TWIM
TWALM
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22.5 Application Block Diagram
Figure 22-2. Application Block Diagram
22.6 I/O Lines Description
22.7 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
22.7.1 I/O Lines
TWD and TWCK are bidirectional lines, connected to a positive supply voltage via a current
source or pull-up resistor (see Figure 22-4 on page 531). When the bus is free, both lines are
high. The output stages of devices connected to the bus must have an open-drain or open-collector
to perform the wired-AND function.
TWALM is used to implement the optional SMBus SMBALERT signal.
The TWALM, TWD, and TWCK pins may be multiplexed with I/O Controller lines. To enable the
TWIM, the user must perform the following steps:
• Program the I/O Controller to:
– Dedicate TWD, TWCK, and optionally TWALM as peripheral lines.
– Define TWD, TWCK, and optionally TWALM as open-drain.
22.7.2 Power Management
If the CPU enters a sleep mode that disables clocks used by the TWIM, the TWIM will stop functioning
and resume operation after the system wakes up from sleep mode.
TWI
Master
TWD
TWCK
Atmel TWI
serial EEPROM I
2
C RTC I
2
C LCD
controller
I
2
C temp
sensor
Slave 2 Slave 3 Slave 4
VDD
Rp: pull-up value as given by the I2C Standard
TWALM
Slave 1
Rp Rp Rp
Table 22-4. I/O Lines Description
Pin Name Pin Description Type
TWD Two-wire Serial Data Input/Output
TWCK Two-wire Serial Clock Input/Output
TWALM SMBus SMBALERT Input/Output
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22.7.3 Clocks
The clock for the TWIM bus interface (CLK_TWIM) is generated by the Power Manager. This
clock is enabled at reset, and can be disabled in the Power Manager. It is recommended to disable
the TWIM before disabling the clock, to avoid freezing the TWIM in an undefined state.
22.7.4 DMA
The TWIM DMA handshake interface is connected to the Peripheral DMA Controller. Using the
TWIM DMA functionality requires the Peripheral DMA Controller to be programmed after setting
up the TWIM.
22.7.5 Interrupts
The TWIM interrupt request lines are connected to the interrupt controller. Using the TWIM interrupts
requires the interrupt controller to be programmed first.
22.7.6 Debug Operation
When an external debugger forces the CPU into debug mode, the TWIM continues normal operation.
If the TWIM is configured in a way that requires it to be periodically serviced by the CPU
through interrupts or similar, improper operation or data loss may result during debugging.
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22.8 Functional Description
22.8.1 Transfer Format
The data put on the TWD line must be 8 bits long. Data is transferred MSB first; each byte must
be followed by an acknowledgement. The number of bytes per transfer is unlimited (see Figure
22-4).
Each transfer begins with a START condition and terminates with a STOP condition (see Figure
22-4).
• A high-to-low transition on the TWD line while TWCK is high defines the START condition.
• A low-to-high transition on the TWD line while TWCK is high defines a STOP condition.
Figure 22-3. START and STOP Conditions
Figure 22-4. Transfer Format
22.8.2 Operation
The TWIM has two modes of operation:
• Master transmitter mode
• Master receiver mode
The master is the device which starts and stops a transfer and generates the TWCK clock.
These modes are described in the following chapters.
TWD
TWCK
Start Stop
TWD
TWCK
Start Address R/W Ack Data Ack Data Ack Stop
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22.8.2.1 Clock Generation
The Clock Waveform Generator Register (CWGR) is used to control the waveform of the TWCK
clock. CWGR must be written so that the desired TWI bus timings are generated. CWGR
describes bus timings as a function of cycles of a prescaled clock. The clock prescaling can be
selected through the Clock Prescaler field in CWGR (CWGR.EXP).
CWGR has the following fields:
LOW: Prescaled clock cycles in clock low count. Used to time TLOW and TBUF.
HIGH: Prescaled clock cycles in clock high count. Used to time THIGH.
STASTO: Prescaled clock cycles in clock high count. Used to time THD_STA, TSU_STA, TSU_STO.
DATA: Prescaled clock cycles for data setup and hold count. Used to time THD_DAT, TSU_DAT.
EXP: Specifies the clock prescaler setting.
Note that the total clock low time generated is the sum of THD_DAT + TSU_DAT + TLOW.
Any slave or other bus master taking part in the transfer may extend the TWCK low period at any
time.
The TWIM hardware monitors the state of the TWCK line as required by the I²C specification.
The clock generation counters are started when a high/low level is detected on the TWCK line,
not when the TWIM hardware releases/drives the TWCK line. This means that the CWGR settings
alone do not determine the TWCK frequency. The CWGR settings determine the clock low
time and the clock high time, but the TWCK rise and fall times are determined by the external circuitry
(capacitive load, etc.).
Figure 22-5. Bus Timing Diagram
f
PRESCALER
f
CLK_TWIM
2 EXP 1 + = -------------------------
S t
HD:STA
t LOW
t
SU:DAT
t HIGH
t
HD:DAT
t LOW
P
t
SU:STO
Sr
t
SU:STA
t
SU:DAT
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22.8.2.2 Setting up and Performing a Transfer
Operation of the TWIM is mainly controlled by the Control Register (CR) and the Command Register
(CMDR). TWIM status is provided in the Status Register (SR). The following list presents
the main steps in a typical communication:
1. Before any transfers can be performed, bus timings must be configured by writing to the
Clock Waveform Generator Register (CWGR). If operating in SMBus mode, the SMBus
Timing Register (SMBTR) register must also be configured.
2. If the Peripheral DMA Controller is to be used for the transfers, it must be set up.
3. CMDR or NCMDR must be written with a value describing the transfer to be performed.
The interrupt system can be set up to give interrupt requests on specific events or error conditions
in the SR, for example when the transfer is complete or if arbitration is lost. The Interrupt
Enable Register (IER) and Interrupt Disable Register (IDR) can be written to specify which bits in
the SR will generate interrupt requests.
The SR.BUSFREE bit is set when activity is completed on the two-wire bus. The SR.CRDY bit is
set when CMDR and/or NCMDR is ready to receive one or more commands.
The controller will refuse to start a new transfer while ANAK, DNAK, or ARBLST in the Status
Register (SR) is one. This is necessary to avoid a race when the software issues a continuation
of the current transfer at the same time as one of these errors happen. Also, if ANAK or DNAK
occurs, a STOP condition is sent automatically. The user will have to restart the transmission by
clearing the error bits in SR after resolving the cause for the NACK.
After a data or address NACK from the slave, a STOP will be transmitted automatically. Note
that the VALID bit in CMDR is NOT cleared in this case. If this transfer is to be discarded, the
VALID bit can be cleared manually allowing any command in NCMDR to be copied into CMDR.
When a data or address NACK is returned by the slave while the master is transmitting, it is possible
that new data has already been written to the THR register. This data will be transferred out
as the first data byte of the next transfer. If this behavior is to be avoided, the safest approach is
to perform a software reset of the TWIM.
22.8.3 Master Transmitter Mode
A START condition is transmitted and master transmitter mode is initiated when the bus is free
and CMDR has been written with START=1 and READ=0. START and SADR+W will then be
transmitted. During the address acknowledge clock pulse (9th pulse), the master releases the
data line (HIGH), enabling the slave to pull it down in order to acknowledge the address. The
master polls the data line during this clock pulse and sets the Address Not Acknowledged bit
(ANAK) in the Status Register if no slave acknowledges the address.
After the address phase, the following is repeated:
while (NBYTES>0)
1. Wait until THR contains a valid data byte, stretching low period of TWCK. SR.TXRDY
indicates the state of THR. Software or the Peripheral DMA Controller must write the
data byte to THR.
2. Transmit this data byte
3. Decrement NBYTES
4. If (NBYTES==0) and STOP=1, transmit STOP condition
Writing CMDR with START=STOP=1 and NBYTES=0 will generate a transmission with no data
bytes, ie START, SADR+W, STOP.
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TWI transfers require the slave to acknowledge each received data byte. During the acknowledge
clock pulse (9th pulse), the master releases the data line (HIGH), enabling the slave to pull
it down in order to generate the acknowledge. The master polls the data line during this clock
pulse and sets the Data Acknowledge bit (DNACK) in the Status Register if the slave does not
acknowledge the data byte. As with the other status bits, an interrupt can be generated if
enabled in the Interrupt Enable Register (IER).
TXRDY is used as Transmit Ready for the Peripheral DMA Controller transmit channel.
The end of a command is marked when the TWIM sets the SR.CCOMP bit. See Figure 22-6 and
Figure 22-7.
Figure 22-6. Master Write with One Data Byte
Figure 22-7. Master Write with Multiple Data Bytes
22.8.4 Master Receiver Mode
A START condition is transmitted and master receiver mode is initiated when the bus is free and
CMDR has been written with START=1 and READ=1. START and SADR+R will then be transmitted.
During the address acknowledge clock pulse (9th pulse), the master releases the data
line (HIGH), enabling the slave to pull it down in order to acknowledge the address. The master
polls the data line during this clock pulse and sets the Address Not Acknowledged bit (ANAK) in
the Status Register if no slave acknowledges the address.
After the address phase, the following is repeated:
while (NBYTES>0)
TWD
SR.IDLE
TXRDY
Write THR (DATA)
NBYTES set to 1
STOP sent automatically
(ACK received and NBYTES=0)
S DADR W A DATA A P
TWD
SR.IDLE
TXRDY
Write THR
(DATAn)
NBYTES set to n
STOP sent automatically
(ACK received and NBYTES=0)
S DADR W A DATAn A DATAn+5 A A DATAn+m P
Write THR
(DATAn+1)
Write THR
(DATAn+m)
Last data sent
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1. Wait until RHR is empty, stretching low period of TWCK. SR.RXRDY indicates the state
of RHR. Software or the Peripheral DMA Controller must read any data byte present in
RHR.
2. Release TWCK generating a clock that the slave uses to transmit a data byte.
3. Place the received data byte in RHR, set RXRDY.
4. If NBYTES=0, generate a NAK after the data byte, otherwise generate an ACK.
5. Decrement NBYTES
6. If (NBYTES==0) and STOP=1, transmit STOP condition.
Writing CMDR with START=STOP=1 and NBYTES=0 will generate a transmission with no data
bytes, ie START, DADR+R, STOP
The TWI transfers require the master to acknowledge each received data byte. During the
acknowledge clock pulse (9th pulse), the slave releases the data line (HIGH), enabling the master
to pull it down in order to generate the acknowledge. All data bytes except the last are
acknowledged by the master. Not acknowledging the last byte informs the slave that the transfer
is finished.
RXRDY is used as Receive Ready for the Peripheral DMA Controller receive channel.
Figure 22-8. Master Read with One Data Byte
Figure 22-9. Master Read with Multiple Data Bytes
TWD
SR.IDLE
RXRDY
Write START &
STOP bit
NBYTES set to 1
Read RHR
S DADR R A DATA N P
TWD
SR.IDLE
RXRDY
Write START +
STOP bit
NBYTES set to m
S DADR R A DATAn A DATAn+m-1 A N DATAn+m P
Read RHR
DATAn
DATAn+1
Read RHR
DATAn+m-2
Read RHR
DATAn+m-1
Read RHR
DATAn+m
Send STOP
When NBYTES=0
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22.8.5 Using the Peripheral DMA Controller
The use of the Peripheral DMA Controller significantly reduces the CPU load. The user can set
up ring buffers for the Peripheral DMA Controller, containing data to transmit or free buffer space
to place received data.
To assure correct behavior, respect the following programming sequences:
22.8.5.1 Data Transmit with the Peripheral DMA Controller
1. Initialize the transmit Peripheral DMA Controller (memory pointers, size, etc.).
2. Configure the TWIM (ADR, NBYTES, etc.).
3. Start the transfer by enabling the Peripheral DMA Controller to transmit.
4. Wait for the Peripheral DMA Controller end-of-transmit flag.
5. Disable the Peripheral DMA Controller.
22.8.5.2 Data Receive with the Peripheral DMA Controller
1. Initialize the receive Peripheral DMA Controller (memory pointers, size, etc.).
2. Configure the TWIM (ADR, NBYTES, etc.).
3. Start the transfer by enabling the Peripheral DMA Controller to receive.
4. Wait for the Peripheral DMA Controller end-of-receive flag.
5. Disable the Peripheral DMA Controller.
22.8.6 Multi-master Mode
More than one master may access the bus at the same time without data corruption by using
arbitration.
Arbitration starts as soon as two or more masters place information on the bus at the same time,
and stops (arbitration is lost) for the master that intends to send a logical one while the other
master sends a logical zero.
As soon as arbitration is lost by a master, it stops sending data and listens to the bus in order to
detect a STOP. The SR.ARBLST flag will be set. When the STOP is detected, the master who
lost arbitration may reinitiate the data transfer.
Arbitration is illustrated in Figure 22-11.
If the user starts a transfer and if the bus is busy, the TWIM automatically waits for a STOP condition
on the bus before initiating the transfer (see Figure 22-10).
Note: The state of the bus (busy or free) is not indicated in the user interface.
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Figure 22-10. User Sends Data While the Bus is Busy
Figure 22-11. Arbitration Cases
22.8.7 Combined Transfers
CMDR and NCMDR may be used to generate longer sequences of connected transfers, since
generation of START and/or STOP conditions is programmable on a per-command basis.
Writing NCMDR with START=1 when the previous transfer was written with STOP=0 will cause
a REPEATED START on the bus. The ability to generate such connected transfers allows arbitrary
transfer lengths, since it is legal to write CMDR with both START=0 and STOP=0. If this is
done in master receiver mode, the CMDR.ACKLAST bit must also be controlled.
TWCK
TWD DATA sent by a master
STOP sent by the master START sent by the TWI
DATA sent by the TWI
Bus is busy
Bus is free
A transfer is programmed
(DADR + W + START + Write THR) Transfer is initiated
TWI DATA transfer Transfer is kept
Bus is considered as free
TWCK
Bus is busy Bus is free
A transfer is programmed
(DADR + W + START + Write THR) Transfer is initiated
TWI DATA transfer Transfer is kept
Bus is considered as free
Data from a Master
Data from TWI S 0
S 0 0
1
1
1
ARBLST
S 0
S 0 0
1
1
1
TWD S 1 0 0
1 1
1 1
Arbitration is lost
TWI stops sending data
P
P S 1 0 0
1 1
Data from the master 1 1 Data from the TWI
Arbitration is lost
The master stops sending data
Transfer is stopped
Transfer is programmed again
(DADR + W + START + Write THR)
TWCK
TWD
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As for single data transfers, the TXRDY and RXRDY bits in the Status Register indicates when
data to transmit can be written to THR, or when received data can be read from RHR. Transfer
of data to THR and from RHR can also be done automatically by DMA, see Section 22.8.5
22.8.7.1 Write Followed by Write
Consider the following transfer:
START, DADR+W, DATA+A, DATA+A, REPSTART, DADR+W, DATA+A, DATA+A, STOP.
To generate this transfer:
1. Write CMDR with START=1, STOP=0, DADR, NBYTES=2 and READ=0.
2. Write NCMDR with START=1, STOP=1, DADR, NBYTES=2 and READ=0.
3. Wait until SR.TXRDY==1, then write first data byte to transfer to THR.
4. Wait until SR.TXRDY==1, then write second data byte to transfer to THR.
5. Wait until SR.TXRDY==1, then write third data byte to transfer to THR.
6. Wait until SR.TXRDY==1, then write fourth data byte to transfer to THR.
22.8.7.2 Read Followed by Read
Consider the following transfer:
START, DADR+R, DATA+A, DATA+NA, REPSTART, DADR+R, DATA+A, DATA+NA, STOP.
To generate this transfer:
1. Write CMDR with START=1, STOP=0, DADR, NBYTES=2 and READ=1.
2. Write NCMDR with START=1, STOP=1, DADR, NBYTES=2 and READ=1.
3. Wait until SR.RXRDY==1, then read first data byte received from RHR.
4. Wait until SR.RXRDY==1, then read second data byte received from RHR.
5. Wait until SR.RXRDY==1, then read third data byte received from RHR.
6. Wait until SR.RXRDY==1, then read fourth data byte received from RHR.
If combining several transfers, without any STOP or REPEATED START between them, remember
to write a one to the ACKLAST bit in CMDR to keep from ending each of the partial transfers
with a NACK.
22.8.7.3 Write Followed by Read
Consider the following transfer:
START, DADR+W, DATA+A, DATA+A, REPSTART, DADR+R, DATA+A, DATA+NA, STOP.
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Figure 22-12. Combining a Write and Read Transfer
To generate this transfer:
1. Write CMDR with START=1, STOP=0, DADR, NBYTES=2 and READ=0.
2. Write NCMDR with START=1, STOP=1, DADR, NBYTES=2 and READ=1.
3. Wait until SR.TXRDY==1, then write first data byte to transfer to THR.
4. Wait until SR.TXRDY==1, then write second data byte to transfer to THR.
5. Wait until SR.RXRDY==1, then read first data byte received from RHR.
6. Wait until SR.RXRDY==1, then read second data byte received from RHR.
22.8.7.4 Read Followed by Write
Consider the following transfer:
START, DADR+R, DATA+A, DATA+NA, REPSTART, DADR+W, DATA+A, DATA+A, STOP.
Figure 22-13. Combining a Read and Write Transfer
To generate this transfer:
1. Write CMDR with START=1, STOP=0, DADR, NBYTES=2 and READ=1.
2. Write NCMDR with START=1, STOP=1, DADR, NBYTES=2 and READ=0.
3. Wait until SR.RXRDY==1, then read first data byte received from RHR.
4. Wait until SR.RXRDY==1, then read second data byte received from RHR.
5. Wait until SR.TXRDY==1, then write first data byte to transfer to THR.
6. Wait until SR.TXRDY==1, then write second data byte to transfer to THR.
TWD
SR.IDLE
TXRDY
S DADR W A DATA0 A DATA1 NA Sr DADR R A DATA2 A DATA3 A P
THR DATA0 DATA1
RXRDY
1
RHR DATA2 DATA3
TWD
SR.IDLE
TXRDY
S SADR R A DATA0 A DATA1 Sr DADR W A DATA2 A DATA3 NA P
THR DATA2
RXRDY
RHR DATA0 DATA3
A
1
2
DATA3
Read
TWI_RHR
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22.8.8 Ten Bit Addressing
Writing a one to CMDR.TENBIT enables 10-bit addressing in hardware. Performing transfers
with 10-bit addressing is similar to transfers with 7-bit addresses, except that bits 9:7 of
CMDR.SADR must be written appropriately.
In Figure 22-14 and Figure 22-15, the grey boxes represent signals driven by the master, the
white boxes are driven by the slave.
22.8.8.1 Master Transmitter
To perform a master transmitter transfer:
1. Write CMDR with TENBIT=1, REPSAME=0, READ=0, START=1, STOP=1 and the
desired address and NBYTES value.
Figure 22-14. A Write Transfer with 10-bit Addressing
22.8.8.2 Master Receiver
When using master receiver mode with 10-bit addressing, CMDR.REPSAME must also be controlled.
CMDR.REPSAME must be written to one when the address phase of the transfer should
consist of only 1 address byte (the 11110xx byte) and not 2 address bytes. The I²C standard
specifies that such addressing is required when addressing a slave for reads using 10-bit
addressing.
To perform a master receiver transfer:
1. Write CMDR with TENBIT=1, REPSAME=0, READ=0, START=1, STOP=0,
NBYTES=0 and the desired address.
2. Write NCMDR with TENBIT=1, REPSAME=1, READ=1, START=1, STOP=1 and the
desired address and NBYTES value.
Figure 22-15. A Read Transfer with 10-bit Addressing
22.8.9 SMBus Mode
SMBus mode is enabled and disabled by writing to the SMEN and SMDIS bits in CR. SMBus
mode operation is similar to I²C operation with the following exceptions:
• Only 7-bit addressing can be used.
• The SMBus standard describes a set of timeout values to ensure progress and throughput on
the bus. These timeout values must be written into SMBTR.
• Transmissions can optionally include a CRC byte, called Packet Error Check (PEC).
• A dedicated bus line, SMBALERT, allows a slave to get a master’s attention.
• A set of addresses have been reserved for protocol handling, such as Alert Response
Address (ARA) and Host Header (HH) Address.
S SLAVE ADDRESS
1st 7 bits RW A1 A2 DATA A P SLAVE ADDRESS
2nd byte DATA AA
11110XX0
S SLAVE ADDRESS
1st 7 bits RW A1 A2 DATA A P SLAVE ADDRESS
2nd byte DATA A
11110XX0
Sr SLAVE ADDRESS
1st 7 bits RW A3
11110XX1
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22.8.9.1 Packet Error Checking
Each SMBus transfer can optionally end with a CRC byte, called the PEC byte. Writing a one to
CMDR.PECEN enables automatic PEC handling in the current transfer. Transfers with and without
PEC can freely be intermixed in the same system, since some slaves may not support PEC.
The PEC LFSR is always updated on every bit transmitted or received, so that PEC handling on
combined transfers will be correct.
In master transmitter mode, the master calculates a PEC value and transmits it to the slave after
all data bytes have been transmitted. Upon reception of this PEC byte, the slave will compare it
to the PEC value it has computed itself. If the values match, the data was received correctly, and
the slave will return an ACK to the master. If the PEC values differ, data was corrupted, and the
slave will return a NACK value. The DNAK bit in SR reflects the state of the last received
ACK/NACK value. Some slaves may not be able to check the received PEC in time to return a
NACK if an error occurred. In this case, the slave should always return an ACK after the PEC
byte, and some other mechanism must be implemented to verify that the transmission was
received correctly.
In master receiver mode, the slave calculates a PEC value and transmits it to the master after all
data bytes have been transmitted. Upon reception of this PEC byte, the master will compare it to
the PEC value it has computed itself. If the values match, the data was received correctly. If the
PEC values differ, data was corrupted, and SR.PECERR is set. In master receiver mode, the
PEC byte is always followed by a NACK transmitted by the master, since it is the last byte in the
transfer.
The PEC byte is automatically inserted in a master transmitter transmission if PEC is enabled
when NBYTES reaches zero. The PEC byte is identified in a master receiver transmission if
PEC is enabled when NBYTES reaches zero. NBYTES must therefore be written with the total
number of data bytes in the transmission, including the PEC byte.
In combined transfers, the PECEN bit should only be written to one in the last of the combined
transfers. Consider the following transfer:
S, ADR+W, COMMAND_BYTE, ACK, SR, ADR+R, DATA_BYTE, ACK, PEC_BYTE, NACK, P
This transfer is generated by writing two commands to the command registers. The first command
is a write with NBYTES=1 and PECEN=0, and the second is a read with NBYTES=2 and
PECEN=1.
Writing a one to the STOP bit in CR will place a STOP condition on the bus after the current
byte. No PEC byte will be sent in this case.
22.8.9.2 Timeouts
The TLOWS and TLOWM fields in SMBTR configure the SMBus timeout values. If a timeout
occurs, the master will transmit a STOP condition and leave the bus. The SR.TOUT bit is set.
22.8.9.3 SMBus ALERT Signal
A slave can get the master’s attention by pulling the TWALM line low. The TWIM will then set the
SR.SMBALERT bit. This can be set up to trigger an interrupt, and software can then take the
appropriate action, as defined in the SMBus standard.
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22.8.10 Identifying Bus Events
This chapter lists the different bus events, and how they affect bits in the TWIM registers. This is
intended to help writing drivers for the TWIM.
Table 22-5. Bus Events
Event Effect
Master transmitter has sent
a data byte SR.THR is cleared.
Master receiver has
received a data byte SR.RHR is set.
Start+Sadr sent, no ack
received from slave
SR.ANAK is set.
SR.CCOMP not set.
CMDR.VALID remains set.
STOP automatically transmitted on bus.
Data byte sent to slave, no
ack received from slave
SR.DNAK is set.
SR.CCOMP not set.
CMDR.VALID remains set.
STOP automatically transmitted on bus.
Arbitration lost
SR.ARBLST is set.
SR.CCOMP not set.
CMDR.VALID remains set.
TWCK and TWD immediately released to a pulled-up state.
SMBus Alert received SR.SMBALERT is set.
SMBus timeout received
SR.SMBTOUT is set.
SR.CCOMP not set.
CMDR.VALID remains set.
STOP automatically transmitted on bus.
Master transmitter receives
SMBus PEC Error
SR.DNAK is set.
SR.CCOMP not set.
CMDR.VALID remains set.
STOP automatically transmitted on bus.
Master receiver discovers
SMBus PEC Error
SR.PECERR is set.
SR.CCOMP not set.
CMDR.VALID remains set.
STOP automatically transmitted on bus.
CR.STOP is written by user
SR.STOP is set.
SR.CCOMP set.
CMDR.VALID remains set.
STOP transmitted on bus after current byte transfer has finished.
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22.9 User Interface
Note: 1. The reset values for these registers are device specific. Please refer to the Module Configuration section at the end of this
chapter.
Table 22-6. TWIM Register Memory Map
Offset Register Register Name Access Reset
0x00 Control Register CR Write-only 0x00000000
0x04 Clock Waveform Generator Register CWGR Read/Write 0x00000000
0x08 SMBus Timing Register SMBTR Read/Write 0x00000000
0x0C Command Register CMDR Read/Write 0x00000000
0x10 Next Command Register NCMDR Read/Write 0x00000000
0x14 Receive Holding Register RHR Read-only 0x00000000
0x18 Transmit Holding Register THR Write-only 0x00000000
0x1C Status Register SR Read-only 0x00000002
0x20 Interrupt Enable Register IER Write-only 0x00000000
0x24 Interrupt Disable Register IDR Write-only 0x00000000
0x28 Interrupt Mask Register IMR Read-only 0x00000000
0x2C Status Clear Register SCR Write-only 0x00000000
0x30 Parameter Register PR Read-only -(1)
0x34 Version Register VR Read-only -(1)
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22.9.1 Control Register
Name: CR
Access Type: Write-only
Offset: 0x00
Reset Value: 0x00000000
• STOP: Stop the Current Transfer
Writing a one to this bit terminates the current transfer, sending a STOP condition after the shifter has become idle. If there are
additional pending transfers, they will have to be explicitly restarted by software after the STOP condition has been successfully
sent.
Writing a zero to this bit has no effect.
• SWRST: Software Reset
If the TWIM master interface is enabled, writing a one to this bit resets the TWIM. All transfers are halted immediately, possibly
violating the bus semantics.
If the TWIM master interface is not enabled, it must first be enabled before writing a one to this bit.
Writing a zero to this bit has no effect.
• SMDIS: SMBus Disable
Writing a one to this bit disables SMBus mode.
Writing a zero to this bit has no effect.
• SMEN: SMBus Enable
Writing a one to this bit enables SMBus mode.
Writing a zero to this bit has no effect.
• MDIS: Master Disable
Writing a one to this bit disables the master interface.
Writing a zero to this bit has no effect.
• MEN: Master Enable
Writing a one to this bit enables the master interface.
Writing a zero to this bit has no effect.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - - - STOP
76543210
SWRST - SMDIS SMEN - - MDIS MEN
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22.9.2 Clock Waveform Generator Register
Name: CWGR
Access Type: Read/Write
Offset: 0x04
Reset Value: 0x00000000
• EXP: Clock Prescaler
Used to specify how to prescale the TWCK clock. Counters are prescaled according to the following formula
• DATA: Data Setup and Hold Cycles
Clock cycles for data setup and hold count. Prescaled by CWGR.EXP. Used to time THD_DAT, TSU_DAT.
• STASTO: START and STOP Cycles
Clock cycles in clock high count. Prescaled by CWGR.EXP. Used to time THD_STA, TSU_STA, TSU_STO
• HIGH: Clock High Cycles
Clock cycles in clock high count. Prescaled by CWGR.EXP. Used to time THIGH.
• LOW: Clock Low Cycles
Clock cycles in clock low count. Prescaled by CWGR.EXP. Used to time TLOW, TBUF.
31 30 29 28 27 26 25 24
- EXP DATA
23 22 21 20 19 18 17 16
STASTO
15 14 13 12 11 10 9 8
HIGH
76543210
LOW
f
PRESCALER
f
CLK_TWIM
2 EXP 1 + = -------------------------
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22.9.3 SMBus Timing Register
Name: SMBTR
Access Type: Read/Write
Offset: 0x08
Reset Value: 0x00000000
• EXP: SMBus Timeout Clock Prescaler
Used to specify how to prescale the TIM and TLOWM counters in SMBTR. Counters are prescaled according to the following
formula
• THMAX: Clock High Maximum Cycles
Clock cycles in clock high maximum count. Prescaled by SMBTR.EXP. Used for bus free detection. Used to time THIGH:MAX.
NOTE: Uses the prescaler specified by CWGR, NOT the prescaler specified by SMBTR.
• TLOWM: Master Clock Stretch Maximum Cycles
Clock cycles in master maximum clock stretch count. Prescaled by SMBTR.EXP. Used to time TLOW:MEXT
• TLOWS: Slave Clock Stretch Maximum Cycles
Clock cycles in slave maximum clock stretch count. Prescaled by SMBTR.EXP. Used to time TLOW:SEXT.
31 30 29 28 27 26 25 24
EXP - - - -
23 22 21 20 19 18 17 16
THMAX
15 14 13 12 11 10 9 8
TLOWM
76543210
TLOWS
f
prescaled SMBus
f
CLKTWIM
2 EXP + 1 = ------------------------
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22.9.4 Command Register
Name: CMDR
Access Type: Read/Write
Offset: 0x0C
Reset Value: 0x00000000
• ACKLAST: ACK Last Master RX Byte
0: Causes the last byte in master receive mode (when NBYTES has reached 0) to be NACKed. This is the standard way of
ending a master receiver transfer.
1: Causes the last byte in master receive mode (when NBYTES has reached 0) to be ACKed. Used for performing linked
transfers in master receiver mode with no STOP or REPEATED START between the subtransfers. This is needed when more
than 255 bytes are to be received in one single transmission.
• PECEN: Packet Error Checking Enable
0: Causes the transfer not to use PEC byte verification. The PEC LFSR is still updated for every bit transmitted or received. Must
be used if SMBus mode is disabled.
1: Causes the transfer to use PEC. PEC byte generation (if master transmitter) or PEC byte verification (if master receiver) will
be performed.
• NBYTES: Number of Data Bytes in Transfer
The number of data bytes in the transfer. After the specified number of bytes have been transferred, a STOP condition is
transmitted if CMDR.STOP is one. In SMBus mode, if PEC is used, NBYTES includes the PEC byte, i.e. there are NBYTES-1
data bytes and a PEC byte.
• VALID: CMDR Valid
0: Indicates that CMDR does not contain a valid command.
1: Indicates that CMDR contains a valid command. This bit is cleared when the command is finished.
• STOP: Send STOP Condition
0: Do not transmit a STOP condition after the data bytes have been transmitted.
1: Transmit a STOP condition after the data bytes have been transmitted.
• START: Send START Condition
0: The transfer in CMDR should not commence with a START or REPEATED START condition.
1: The transfer in CMDR should commence with a START or REPEATED START condition. If the bus is free when the command
is executed, a START condition is used. If the bus is busy, a REPEATED START is used.
• REPSAME: Transfer is to Same Address as Previous Address
Only used in 10-bit addressing mode, always write to 0 in 7-bit addressing mode.
31 30 29 28 27 26 25 24
- - - - ACKLAST PECEN
23 22 21 20 19 18 17 16
NBYTES
15 14 13 12 11 10 9 8
VALID STOP START REPSAME TENBIT SADR[9:7]
76543210
SADR[6:0] READ
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Write this bit to one if the command in CMDR performs a repeated start to the same slave address as addressed in the previous
transfer in order to enter master receiver mode.
Write this bit to zero otherwise.
• TENBIT: Ten Bit Addressing Mode
0: Use 7-bit addressing mode.
1: Use 10-bit addressing mode. Must not be used when the TWIM is in SMBus mode.
• SADR: Slave Address
Address of the slave involved in the transfer. Bits 9-7 are don’t care if 7-bit addressing is used.
• READ: Transfer Direction
0: Allow the master to transmit data.
1: Allow the master to receive data.
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22.9.5 Next Command Register
Name: NCMDR
Access Type: Read/Write
Offset: 0x10
Reset Value: 0x00000000
This register is identical to CMDR. When the VALID bit in CMDR becomes 0, the content of NCMDR is copied into CMDR,
clearing the VALID bit in NCMDR. If the VALID bit in CMDR is cleared when NCMDR is written, the content is copied
immediately.
31 30 29 28 27 26 25 24
- - - - ACKLAST PECEN
23 22 21 20 19 18 17 16
NBYTES
15 14 13 12 11 10 9 8
VALID STOP START REPSAME TENBIT SADR[9:7]
76543210
SADR[6:0] READ
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22.9.6 Receive Holding Register
Name: RHR
Access Type: Read-only
Offset: 0x14
Reset Value: 0x00000000
• RXDATA: Received Data
When the RXRDY bit in the Status Register (SR) is one, this field contains a byte received from the TWI bus.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
RXDATA
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22.9.7 Transmit Holding Register
Name: THR
Access Type: Write-only
Offset: 0x18
Reset Value: 0x00000000
• TXDATA: Data to Transmit
Write data to be transferred on the TWI bus here.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
TXDATA
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22.9.8 Status Register
Name: SR
Access Type: Read-only
Offset: 0x1C
Reset Value: 0x00000002
• MENB: Master Interface Enable
0: Master interface is disabled.
1: Master interface is enabled.
• STOP: Stop Request Accepted
This bit is one when a STOP request caused by writing a one to CR.STOP has been accepted, and transfer has stopped.
This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).
• PECERR: PEC Error
This bit is one when a SMBus PEC error occurred.
This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).
• TOUT: Timeout
This bit is one when a SMBus timeout occurred.
This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).
• SMBALERT: SMBus Alert
This bit is one when an SMBus Alert was received.
This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).
• ARBLST: Arbitration Lost
This bit is one when the actual state of the SDA line did not correspond to the data driven onto it, indicating a higher-priority
transmission in progress by a different master.
This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).
• DNAK: NAK in Data Phase Received
This bit is one when no ACK was received form slave during data transmission.
This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).
• ANAK: NAK in Address Phase Received
This bit is one when no ACK was received from slave during address phase
This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).
• BUSFREE: Two-wire Bus is Free
This bit is one when activity has completed on the two-wire bus.
Otherwise, this bit is cleared.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - - - - MENB
15 14 13 12 11 10 9 8
- STOP PECERR TOUT SMBALERT ARBLST DNAK ANAK
76543210
- - BUSFREE IDLE CCOMP CRDY TXRDY RXRDY
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• IDLE: Master Interface is Idle
This bit is one when no command is in progress, and no command waiting to be issued.
Otherwise, this bit is cleared.
• CCOMP: Command Complete
This bit is one when the current command has completed successfully.
This bit is zero if the command failed due to conditions such as a NAK receved from slave.
This bit is cleared by writing 1 to the corresponding bit in the Status Clear Register (SCR).
• CRDY: Ready for More Commands
This bit is one when CMDR and/or NCMDR is ready to receive one or more commands.
This bit is cleared when this is no longer true.
• TXRDY: THR Data Ready
This bit is one when THR is ready for one or more data bytes.
This bit is cleared when this is no longer true (i.e. THR is full or transmission has stopped).
• RXRDY: RHR Data Ready
This bit is one when RX data are ready to be read from RHR.
This bit is cleared when this is no longer true.
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22.9.9 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x20
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- STOP PECERR TOUT SMBALERT ARBLST DNAK ANAK
76543210
- - BUSFREE IDLE CCOMP CRDY TXRDY RXRDY
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22.9.10 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x24
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- STOP PECERR TOUT SMBALERT ARBLST DNAK ANAK
76543210
- - BUSFREE IDLE CCOMP CRDY TXRDY RXRDY
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22.9.11 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x28
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
This bit is cleared when the corresponding bit in IDR is written to one.
This bit is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- STOP PECERR TOUT SMBALERT ARBLST DNAK ANAK
76543210
- - BUSFREE IDLE CCOMP CRDY TXRDY RXRDY
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22.9.12 Status Clear Register
Name: SCR
Access Type : Write-only
Offset: 0x2C
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in SR and the corresponding interrupt request.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- STOP PECERR TOUT SMBALERT ARBLST DNAK ANAK
76543210
- - - - CCOMP - - -
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22.9.13 Parameter Register (PR)
Name: PR
Access Type: Read-only
Offset: 0x30
Reset Value: -
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
--------
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22.9.14 Version Register (VR)
Name: VR
Access Type: Read-only
Offset: 0x34
Reset Value: -
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION [11:8]
76543210
VERSION [7:0]
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22.10 Module Configuration
The specific configuration for each TWIM instance is listed in the following tables.The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 22-7. Module Clock Name
Module Name Clock Name Description
TWIM0 CLK_TWIM0 Clock for the TWIM0 bus interface
TWIM1 CLK_TWIM1 Clock for the TWIM1 bus interface
Table 22-8. Register Reset Values
Register Reset Value
VERSION 0x00000110
PARAMETER 0x00000000
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23. Two-wire Slave Interface (TWIS)
Rev.: 1.2.0.1
23.1 Features
• Compatible with I²C standard
– Transfer speeds of 100 and 400 kbit/s
– 7 and 10-bit and General Call addressing
• Compatible with SMBus standard
– Hardware Packet Error Checking (CRC) generation and verification with ACK response
– SMBALERT interface
– 25 ms clock low timeout delay
– 25 ms slave cumulative clock low extend time
• Compatible with PMBus
• DMA interface for reducing CPU load
• Arbitrary transfer lengths, including 0 data bytes
• Optional clock stretching if transmit or receive buffers not ready for data transfer
• 32-bit Peripheral Bus interface for configuration of the interface
23.2 Overview
The Atmel Two-wire Slave Interface (TWIS) interconnects components on a unique two-wire
bus, made up of one clock line and one data line with speeds of up to 400 kbit/s, based on a
byte-oriented transfer format. It can be used with any Atmel Two-wire Interface bus, I²C, or
SMBus-compatible master. The TWIS is always a bus slave and can transfer sequential or single
bytes.
Below, Table 23-1 lists the compatibility level of the Atmel Two-wire Slave Interface and a full I²C
compatible device.
Note: 1. START + b000000001 + Ack + Sr
Table 23-1. Atmel TWIS Compatibility with I²C Standard
I²C Standard Atmel TWIS
Standard-mode (100 kbit/s) Supported
Fast-mode (400 kbit/s) Supported
7 or 10 bits Slave Addressing Supported
START BYTE(1) Not Supported
Repeated Start (Sr) Condition Supported
ACK and NAK Management Supported
Slope control and input filtering (Fast mode) Supported
Clock stretching Supported
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Below, Table 23-2 lists the compatibility level of the Atmel Two-wire Slave Interface and a full
SMBus compatible device.
23.3 List of Abbreviations
23.4 Block Diagram
Figure 23-1. Block Diagram
Table 23-2. Atmel TWIS Compatibility with SMBus Standard
SMBus Standard Atmel TWIS
Bus Timeouts Supported
Address Resolution Protocol Supported
Alert Supported
Packet Error Checking Supported
Table 23-3. Abbreviations
Abbreviation Description
TWI Two-wire Interface
A Acknowledge
NA Non Acknowledge
P Stop
S Start
Sr Repeated Start
SADR Slave Address
ADR Any address except SADR
R Read
W Write
Peripheral
Bus Bridge
Two-wire
Interface
I/O Controller
TWCK
TWD
Interrupt
Controller
TWI Interrupt
Power
Manager
CLK_TWIS
TWALM
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23.5 Application Block Diagram
Figure 23-2. Application Block Diagram
23.6 I/O Lines Description
23.7 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
23.7.1 I/O Lines
TWDand TWCK are bidirectional lines, connected to a positive supply voltage via a current
source or pull-up resistor (see Figure 23-5 on page 565). When the bus is free, both lines are
high. The output stages of devices connected to the bus must have an open-drain or open-collector
to perform the wired-AND function.
TWALM is used to implement the optional SMBus SMBALERT signal.
TWALM, TWD, and TWCK pins may be multiplexed with I/O Controller lines. To enable the
TWIS, the user must perform the following steps:
• Program the I/O Controller to:
– Dedicate TWD, TWCK, and optionally TWALM as peripheral lines.
– Define TWD, TWCK, and optionally TWALM as open-drain.
Host with
TWI
Interface
TWD
TWCK
Atmel TWI
serial EEPROM I²C RTC I²C LCD
controller
Slave 1 Slave 2 Slave 3
VDD
I²C temp.
sensor
Slave 4
Rp: Pull up value as given by the I²C Standard
Rp Rp
Table 23-4. I/O Lines Description
Pin Name Pin Description Type
TWD Two-wire Serial Data Input/Output
TWCK Two-wire Serial Clock Input/Output
TWALM SMBus SMBALERT Input/Output
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23.7.2 Power Management
If the CPU enters a sleep mode that disables clocks used by the TWIS, the TWIS will stop functioning
and resume operation after the system wakes up from sleep mode. The TWIS is able to
wake the system from sleep mode upon address match, see Section 23.8.8 on page 572.
23.7.3 Clocks
The clock for the TWIS bus interface (CLK_TWIS) is generated by the Power Manager. This
clock is enabled at reset, and can be disabled in the Power Manager. It is recommended to disable
the TWIS before disabling the clock, to avoid freezing the TWIS in an undefined state.
23.7.4 DMA
The TWIS DMA handshake interface is connected to the Peripheral DMA Controller. Using the
TWIS DMA functionality requires the Peripheral DMA Controller to be programmed after setting
up the TWIS.
23.7.5 Interrupts
The TWIS interrupt request lines are connected to the interrupt controller. Using the TWIS interrupts
requires the interrupt controller to be programmed first.
23.7.6 Debug Operation
When an external debugger forces the CPU into debug mode, the TWIS continues normal operation.
If the TWIS is configured in a way that requires it to be periodically serviced by the CPU
through interrupts or similar, improper operation or data loss may result during debugging.
23.8 Functional Description
23.8.1 Transfer Format
The data put on the TWD line must be 8 bits long. Data is transferred MSB first; each byte must
be followed by an acknowledgement. The number of bytes per transfer is unlimited (see Figure
23-4 on page 565).
Each transfer begins with a START condition and terminates with a STOP condition (see Figure
23-3).
• A high-to-low transition on the TWD line while TWCK is high defines the START condition.
• A low-to-high transition on the TWD line while TWCK is high defines a STOP condition.
Figure 23-3. START and STOP Conditions
TWD
TWCK
Start Stop
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Figure 23-4. Transfer Format
23.8.2 Operation
The TWIS has two modes of operation:
• Slave transmitter mode
• Slave receiver mode
A master is a device which starts and stops a transfer and generates the TWCK clock. A slave is
assigned an address and responds to requests from the master. These modes are described in
the following chapters.
Figure 23-5. Typical Application Block Diagram
23.8.2.1 Bus Timing
The Timing Register (TR) is used to control the timing of bus signals driven by the TWIS. TR
describes bus timings as a function of cycles of the prescaled CLK_TWIS. The clock prescaling
can be selected through TR.EXP.
TR has the following fields:
TLOWS: Prescaled clock cycles used to time SMBUS timeout TLOW:SEXT.
TWD
TWCK
Start Address R/W Ack Data Ack Data Ack Stop
Host with
TWI
Interface
TWD
TWCK
Atmel TWI
Serial EEPROM I²C RTC I²C LCD
Controller
Slave 1 Slave 2 Slave 3
VDD
I²C Temp.
Sensor
Slave 4
Rp: Pull up value as given by the I²C Standard
Rp Rp
fPRESCALED
f
CLK_TWIS
2 EXP 1 + = ------------------------
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TTOUT: Prescaled clock cycles used to time SMBUS timeout TTIMEOUT.
SUDAT: Non-prescaled clock cycles for data setup and hold count. Used to time TSU_DAT.
EXP: Specifies the clock prescaler setting used for the SMBUS timeouts.
Figure 23-6. Bus Timing Diagram
23.8.2.2 Setting Up and Performing a Transfer
Operation of the TWIS is mainly controlled by the Control Register (CR). The following list presents
the main steps in a typical communication:
3. Before any transfers can be performed, bus timings must be configured by writing to the
Timing Register (TR).If the Peripheral DMA Controller is to be used for the transfers, it
must be set up.
4. The Control Register (CR) must be configured with information such as the slave
address, SMBus mode, Packet Error Checking (PEC), number of bytes to transfer, and
which addresses to match.
The interrupt system can be set up to generate interrupt request on specific events or error conditions,
for example when a byte has been received.
The NBYTES register is only used in SMBus mode, when PEC is enabled. In I²C mode or in
SMBus mode when PEC is disabled, the NBYTES register is not used, and should be written to
zero. NBYTES is updated by hardware, so in order to avoid hazards, software updates of
NBYTES can only be done through writes to the NBYTES register.
23.8.2.3 Address Matching
The TWIS can be set up to match several different addresses. More than one address match
may be enabled simultaneously, allowing the TWIS to be assigned to several addresses. The
address matching phase is initiated after a START or REPEATED START condition. When the
TWIS receives an address that generates an address match, an ACK is automatically returned
to the master.
S t
HD:STA
t LOW
t
SU:DAT
t HIGH
t
HD:DAT
t LOW
P
t
SU:STO
Sr
t
SU:STA
t
SU:DAT
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ATUC64/128/256L3/4U
In I²C mode:
• The address in CR.ADR is checked for address match if CR.SMATCH is one.
• The General Call address is checked for address match if CR.GCMATCH is one.
In SMBus mode:
• The address in CR.ADR is checked for address match if CR.SMATCH is one.
• The Alert Response Address is checked for address match if CR.SMAL is one.
• The Default Address is checked for address match if CR.SMDA is one.
• The Host Header Address is checked for address match if CR.SMHH is one.
23.8.2.4 Clock Stretching
Any slave or bus master taking part in a transfer may extend the TWCK low period at any time.
The TWIS may extend the TWCK low period after each byte transfer if CR.STREN is one and:
• Module is in slave transmitter mode, data should be transmitted, but THR is empty, or
• Module is in slave receiver mode, a byte has been received and placed into the internal
shifter, but the Receive Holding Register (RHR) is full, or
• Stretch-on-address-match bit CR.SOAM=1 and slave was addressed. Bus clock remains
stretched until all address match bits in the Status Register (SR) have been cleared.
If CR.STREN is zero and:
• Module is in slave transmitter mode, data should be transmitted but THR is empty: Transmit
the value present in THR (the last transmitted byte or reset value), and set SR.URUN.
• Module is in slave receiver mode, a byte has been received and placed into the internal
shifter, but RHR is full: Discard the received byte and set SR.ORUN.
23.8.2.5 Bus Errors
If a bus error (misplaced START or STOP) condition is detected, the SR.BUSERR bit is set and
the TWIS waits for a new START condition.
23.8.3 Slave Transmitter Mode
If the TWIS matches an address in which the R/W bit in the TWI address phase transfer is set, it
will enter slave transmitter mode and set the SR.TRA bit (note that SR.TRA is set one
CLK_TWIS cycle after the relevant address match bit in the same register is set).
After the address phase, the following actions are performed:
1. If SMBus mode and PEC is used, NBYTES must be set up with the number of bytes to
transmit. This is necessary in order to know when to transmit the PEC byte. NBYTES
can also be used to count the number of bytes received if using DMA.
2. Byte to transmit depends on I²C/SMBus mode and CR.PEC:
– If in I²C mode or CR.PEC is zero or NBYTES is non-zero: The TWIS waits until THR
contains a valid data byte, possibly stretching the low period of TWCK. After THR
contains a valid data byte, the data byte is transferred to a shifter, and then
SR.TXRDY is changed to one because the THR is empty again.
– SMBus mode and CR.PEC is one: If NBYTES is zero, the generated PEC byte is
automatically transmitted instead of a data byte from THR. TWCK will not be
stretched by the TWIS.
3. The data byte in the shifter is transmitted.
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4. NBYTES is updated. If CR.CUP is one, NBYTES is incremented, otherwise NBYTES is
decremented.
5. After each data byte has been transmitted, the master transmits an ACK (Acknowledge)
or NAK (Not Acknowledge) bit. If a NAK bit is received by the TWIS, the SR.NAK bit is
set. Note that this is done two CLK_TWIS cycles after TWCK has been sampled by the
TWIS to be HIGH (see Figure 23-9). The NAK indicates that the transfer is finished, and
the TWIS will wait for a STOP or REPEATED START. If an ACK bit is received, the
SR.NAK bit remains LOW. The ACK indicates that more data should be transmitted,
jump to step 2. At the end of the ACK/NAK clock cycle, the Byte Transfer Finished
(SR.BTF) bit is set. Note that this is done two CLK_TWIS cycles after TWCK has been
sampled by the TWIS to be LOW (see Figure 23-9). Also note that in the event that
SR.NAK bit is set, it must not be cleared before the SR.BTF bit is set to ensure correct
TWIS behavior.
6. If STOP is received, SR.TCOMP and SR.STO will be set.
7. If REPEATED START is received, SR.REP will be set.
The TWI transfers require the receiver to acknowledge each received data byte. During the
acknowledge clock pulse (9th pulse), the slave releases the data line (HIGH), enabling the master
to pull it down in order to generate the acknowledge. The slave polls the data line during this
clock pulse and sets the NAK bit in SR if the master does not acknowledge the data byte. A NAK
means that the master does not wish to receive additional data bytes. As with the other status
bits, an interrupt can be generated if enabled in the Interrupt Enable Register (IER).
SR.TXRDY is used as Transmit Ready for the Peripheral DMA Controller transmit channel.
The end of the complete transfer is marked by the SR.TCOMP bit changing from zero to one.
See Figure 23-7 and Figure 23-8.
Figure 23-7. Slave Transmitter with One Data Byte
TCOMP
TXRDY
Write THR (DATA) STOP sent by master
TWD S DADR R P A DATA N
NBYTES set to 1
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Figure 23-8. Slave Transmitter with Multiple Data Bytes
Figure 23-9. Timing Relationship between TWCK, SR.NAK, and SR.BTF
23.8.4 Slave Receiver Mode
If the TWIS matches an address in which the R/W bit in the TWI address phase transfer is
cleared, it will enter slave receiver mode and clear SR.TRA (note that SR.TRA is cleared one
CLK_TWIS cycle after the relevant address match bit in the same register is set).
After the address phase, the following is repeated:
1. If SMBus mode and PEC is used, NBYTES must be set up with the number of bytes to
receive. This is necessary in order to know which of the received bytes is the PEC byte.
NBYTES can also be used to count the number of bytes received if using DMA.
2. Receive a byte. Set SR.BTF when done.
3. Update NBYTES. If CR.CUP is written to one, NBYTES is incremented, otherwise
NBYTES is decremented. NBYTES is usually configured to count downwards if PEC is
used.
4. After a data byte has been received, the slave transmits an ACK or NAK bit. For ordinary
data bytes, the CR.ACK field controls if an ACK or NAK should be returned. If PEC
is enabled and the last byte received was a PEC byte (indicated by NBYTES equal to
zero), The TWIS will automatically return an ACK if the PEC value was correct, otherwise
a NAK will be returned.
5. If STOP is received, SR.TCOMP will be set.
6. If REPEATED START is received, SR.REP will be set.
The TWI transfers require the receiver to acknowledge each received data byte. During the
acknowledge clock pulse (9th pulse), the master releases the data line (HIGH), enabling the
S DADR R DATA n+5 A P A DATA n A DATA n+m N
TCOMP
TXRDY
Write THR (Data n)
NBYTES set to m
STOP sent by master
TWD
Write THR (Data n+1) Write THR (Data n+m)
Last data sent
DATA (LSB) N P
TWCK
SR.NAK
SR.BTF
t1 t1
t1: (CLK_TWIS period) x 2
TWD
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slave to pull it down in order to generate the acknowledge. The master polls the data line during
this clock pulse.
The SR.RXRDY bit indicates that a data byte is available in the RHR. The RXRDY bit is also
used as Receive Ready for the Peripheral DMA Controller receive channel.
Figure 23-10. Slave Receiver with One Data Byte
Figure 23-11. Slave Receiver with Multiple Data Bytes
23.8.5 Interactive ACKing Received Data Bytes
When implementing a register interface over TWI, it may sometimes be necessary or just useful
to report reads and writes to invalid register addresses by sending a NAK to the host. To be able
to do this, one must first receive the register address from the TWI bus, and then tell the TWIS
whether to ACK or NAK it. In normal operation of the TWIS, this is not possible because the controller
will automatically ACK the byte at about the same time as the RXRDY bit changes from
zero to one. Writing a one to the Stretch on Data Byte Received bit (CR.SODR) will stretch the
clock allowing the user to update CR.ACK bit before returning the desired value. After the last bit
in the data byte is received, the TWI bus clock is stretched, the received data byte is transferred
to the RHR register, and SR.BTF is set. At this time, the user can examine the received byte and
write the desired ACK or NACK value to CR.ACK. When the user clears SR.BTF, the desired
ACK value is transferred on the TWI bus. This makes it possible to look at the byte received,
determine if it is valid, and then decide to ACK or NAK it.
23.8.6 Using the Peripheral DMA Controller
The use of the Peripheral DMA Controller significantly reduces the CPU load. The user can set
up ring buffers for the Peripheral DMA Controller, containing data to transmit or free buffer space
to place received data. By initializing NBYTES to zero before a transfer, and writing a one to
CR.CUP, NBYTES is incremented by one each time a data has been transmitted or received.
This allows the user to detect how much data was actually transferred by the DMA system.
S DADR W DATA A P A
TCOMP
RXRDY
Read RHR
TWD
TWD S DADR W DATA n A A A DATA (n+1) A DATA (n+m) DATA (n+m)-1 P A
TCOMP
RXRDY
Read RHR
DATA n
Read RHR
DATA (n+1)
Read RHR
DATA (n+m)-1
Read RHR
DATA (n+m)
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To assure correct behavior, respect the following programming sequences:
23.8.6.1 Data Transmit with the Peripheral DMA Controller
1. Initialize the transmit Peripheral DMA Controller (memory pointers, size, etc.).
2. Configure the TWIS (ADR, NBYTES, etc.).
3. Start the transfer by enabling the Peripheral DMA Controller to transmit.
4. Wait for the Peripheral DMA Controller end-of-transmit flag.
5. Disable the Peripheral DMA Controller.
23.8.6.2 Data Receive with the Peripheral DMA Controller
1. Initialize the receive Peripheral DMA Controller (memory pointers, size - 1, etc.).
2. Configure the TWIS (ADR, NBYTES, etc.).
3. Start the transfer by enabling the Peripheral DMA Controller to receive.
4. Wait for the Peripheral DMA Controller end-of-receive flag.
5. Disable the Peripheral DMA Controller.
23.8.7 SMBus Mode
SMBus mode is enabled by writing a one to the SMBus Mode Enable (SMEN) bit in CR. SMBus
mode operation is similar to I²C operation with the following exceptions:
• Only 7-bit addressing can be used.
• The SMBus standard describes a set of timeout values to ensure progress and throughput on
the bus. These timeout values must be written to TR.
• Transmissions can optionally include a CRC byte, called Packet Error Check (PEC).
• A dedicated bus line, SMBALERT, allows a slave to get a master’s attention.
• A set of addresses have been reserved for protocol handling, such as Alert Response
Address (ARA) and Host Header (HH) Address. Address matching on these addresses can
be enabled by configuring CR appropriately.
23.8.7.1 Packet Error Checking (PEC)
Each SMBus transfer can optionally end with a CRC byte, called the PEC byte. Writing a one to
the Packet Error Checking Enable (PECEN) bit in CR enables automatic PEC handling in the
current transfer. The PEC generator is always updated on every bit transmitted or received, so
that PEC handling on following linked transfers will be correct.
In slave receiver mode, the master calculates a PEC value and transmits it to the slave after all
data bytes have been transmitted. Upon reception of this PEC byte, the slave will compare it to
the PEC value it has computed itself. If the values match, the data was received correctly, and
the slave will return an ACK to the master. If the PEC values differ, data was corrupted, and the
slave will return a NAK value. The SR.SMBPECERR bit is set automatically if a PEC error
occurred.
In slave transmitter mode, the slave calculates a PEC value and transmits it to the master after
all data bytes have been transmitted. Upon reception of this PEC byte, the master will compare
it to the PEC value it has computed itself. If the values match, the data was received correctly. If
the PEC values differ, data was corrupted, and the master must take appropriate action.
The PEC byte is automatically inserted in a slave transmitter transmission if PEC enabled when
NBYTES reaches zero. The PEC byte is identified in a slave receiver transmission if PEC
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enabled when NBYTES reaches zero. NBYTES must therefore be set to the total number of
data bytes in the transmission, including the PEC byte.
23.8.7.2 Timeouts
The Timing Register (TR) configures the SMBus timeout values. If a timeout occurs, the slave
will leave the bus. The SR.SMBTOUT bit is also set.
23.8.7.3 SMBALERT
A slave can get the master’s attention by pulling the SMBALERT line low. This is done by writing
a one to the SMBus Alert (SMBALERT) bit in CR. This will also enable address match on the
Alert Response Address (ARA).
23.8.8 Wakeup from Sleep Modes by TWI Address Match
The TWIS is able to wake the device up from a sleep mode upon an address match, including
sleep modes where CLK_TWIS is stopped. After detecting the START condition on the bus, The
TWIS will stretch TWCK until CLK_TWIS has started. The time required for starting CLK_TWIS
depends on which sleep mode the device is in. After CLK_TWIS has started, the TWIS releases
its TWCK stretching and receives one byte of data on the bus. At this time, only a limited part of
the device, including the TWIS, receives a clock, thus saving power. The TWIS goes on to
receive the slave address. If the address phase causes a TWIS address match, the entire
device is wakened and normal TWIS address matching actions are performed. Normal TWI
transfer then follows. If the TWIS is not addressed, CLK_TWIS is automatically stopped and the
device returns to its original sleep mode.
23.8.9 Identifying Bus Events
This chapter lists the different bus events, and how these affects the bits in the TWIS registers.
This is intended to help writing drivers for the TWIS.
Table 23-5. Bus Events
Event Effect
Slave transmitter has sent a
data byte
SR.THR is cleared.
SR.BTF is set.
The value of the ACK bit sent immediately after the data byte is given
by CR.ACK.
Slave receiver has received
a data byte
SR.RHR is set.
SR.BTF is set.
SR.NAK updated according to value of ACK bit received from master.
Start+Sadr on bus, but
address is to another slave None.
Start+Sadr on bus, current
slave is addressed, but
address match enable bit in
CR is not set
None.
Start+Sadr on bus, current
slave is addressed,
corresponding address
match enable bit in CR set
Correct address match bit in SR is set.
SR.TRA updated according to transfer direction (updating is done one
CLK_TWIS cycle after address match bit is set)
Slave enters appropriate transfer direction mode and data transfer
can commence.
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Start+Sadr on bus, current
slave is addressed,
corresponding address
match enable bit in CR set,
SR.STREN and SR.SOAM
are set.
Correct address match bit in SR is set.
SR.TRA updated according to transfer direction (updating is done one
CLK_TWIS cycle after address match bit is set).
Slave stretches TWCK immediately after transmitting the address
ACK bit. TWCK remains stretched until all address match bits in SR
have been cleared.
Slave enters appropriate transfer direction mode and data transfer
can commence.
Repeated Start received
after being addressed
SR.REP set.
SR.TCOMP unchanged.
Stop received after being
addressed
SR.STO set.
SR.TCOMP set.
Start, Repeated Start, or
Stop received in illegal
position on bus
SR.BUSERR set.
SR.STO and SR.TCOMP may or may not be set depending on the
exact position of an illegal stop.
Data is to be received in
slave receiver mode,
SR.STREN is set, and RHR
is full
TWCK is stretched until RHR has been read.
Data is to be transmitted in
slave receiver mode,
SR.STREN is set, and THR
is empty
TWCK is stretched until THR has been written.
Data is to be received in
slave receiver mode,
SR.STREN is cleared, and
RHR is full
TWCK is not stretched, read data is discarded.
SR.ORUN is set.
Data is to be transmitted in
slave receiver mode,
SR.STREN is cleared, and
THR is empty
TWCK is not stretched, previous contents of THR is written to bus.
SR.URUN is set.
SMBus timeout received SR.SMBTOUT is set.
TWCK and TWD are immediately released.
Slave transmitter in SMBus
PEC mode has transmitted
a PEC byte, that was not
identical to the PEC
calculated by the master
receiver.
Master receiver will transmit a NAK as usual after the last byte of a
master receiver transfer.
Master receiver will retry the transfer at a later time.
Slave receiver discovers
SMBus PEC Error
SR.SMBPECERR is set.
NAK returned after the data byte.
Table 23-5. Bus Events
Event Effect
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23.9 User Interface
Note: 1. The reset values for these registers are device specific. Please refer to the Module Configuration section at the end of this
chapter.
Table 23-6. TWIS Register Memory Map
Offset Register Register Name Access Reset
0x00 Control Register CR Read/Write 0x00000000
0x04 NBYTES Register NBYTES Read/Write 0x00000000
0x08 Timing Register TR Read/Write 0x00000000
0x0C Receive Holding Register RHR Read-only 0x00000000
0x10 Transmit Holding Register THR Write-only 0x00000000
0x14 Packet Error Check Register PECR Read-only 0x00000000
0x18 Status Register SR Read-only 0x00000002
0x1C Interrupt Enable Register IER Write-only 0x00000000
0x20 Interrupt Disable Register IDR Write-only 0x00000000
0x24 Interrupt Mask Register IMR Read-only 0x00000000
0x28 Status Clear Register SCR Write-only 0x00000000
0x2C Parameter Register PR Read-only -(1)
0x30 Version Register VR Read-only -(1)
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23.9.1 Control Register
Name: CR
Access Type: Read/Write
Offset: 0x00
Reset Value: 0x00000000
• TENBIT: Ten Bit Address Match
0: Disables Ten Bit Address Match.
1: Enables Ten Bit Address Match.
• ADR: Slave Address
Slave address used in slave address match. Bits 9:0 are used if in 10-bit mode, bits 6:0 otherwise.
• SODR: Stretch Clock on Data Byte Reception
0: Does not stretch bus clock immediately before ACKing a received data byte.
1: Stretches bus clock immediately before ACKing a received data byte.
• SOAM: Stretch Clock on Address Match
0: Does not stretch bus clock after address match.
1: Stretches bus clock after address match.
• CUP: NBYTES Count Up
0: Causes NBYTES to count down (decrement) per byte transferred.
1: Causes NBYTES to count up (increment) per byte transferred.
• ACK: Slave Receiver Data Phase ACK Value
0: Causes a low value to be returned in the ACK cycle of the data phase in slave receiver mode.
1: Causes a high value to be returned in the ACK cycle of the data phase in slave receiver mode.
• PECEN: Packet Error Checking Enable
0: Disables SMBus PEC (CRC) generation and check.
1: Enables SMBus PEC (CRC) generation and check.
• SMHH: SMBus Host Header
0: Causes the TWIS not to acknowledge the SMBus Host Header.
1: Causes the TWIS to acknowledge the SMBus Host Header.
• SMDA: SMBus Default Address
0: Causes the TWIS not to acknowledge the SMBus Default Address.
1: Causes the TWIS to acknowledge the SMBus Default Address.
• SMBALERT: SMBus Alert
0: Causes the TWIS to release the SMBALERT line and not to acknowledge the SMBus Alert Response Address (ARA).
1: Causes the TWIS to pull down the SMBALERT line and to acknowledge the SMBus Alert Response Address (ARA).
31 30 29 28 27 26 25 24
- - - - - TENBIT ADR[9:8]
23 22 21 20 19 18 17 16
ADR[7:0]
15 14 13 12 11 10 9 8
SODR SOAM CUP ACK PECEN SMHH SMDA SMBALERT
76543210
SWRST - - STREN GCMATCH SMATCH SMEN SEN
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• SWRST: Software Reset
This bit will always read as 0.
Writing a zero to this bit has no effect.
Writing a one to this bit resets the TWIS.
• STREN: Clock Stretch Enable
0: Disables clock stretching if RHR/THR buffer full/empty. May cause over/underrun.
1: Enables clock stretching if RHR/THR buffer full/empty.
• GCMATCH: General Call Address Match
0: Causes the TWIS not to acknowledge the General Call Address.
1: Causes the TWIS to acknowledge the General Call Address.
• SMATCH: Slave Address Match
0: Causes the TWIS not to acknowledge the Slave Address.
1: Causes the TWIS to acknowledge the Slave Address.
• SMEN: SMBus Mode Enable
0: Disables SMBus mode.
1: Enables SMBus mode.
• SEN: Slave Enable
0: Disables the slave interface.
1: Enables the slave interface.
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23.9.2 NBYTES Register
Name: NBYTES
Access Type: Read/Write
Offset: 0x04
Reset Value: 0x00000000
• NBYTES: Number of Bytes to Transfer
Writing to this field updates the NBYTES counter. The field can also be read to learn the progress of the transfer. NBYTES can
be incremented or decremented automatically by hardware.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
NBYTES
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23.9.3 Timing Register
Name: TR
Access Type: Read/Write
Offset: 0x08
Reset Value: 0x00000000
• EXP: Clock Prescaler
Used to specify how to prescale the SMBus TLOWS counter. The counter is prescaled according to the following formula:
• SUDAT: Data Setup Cycles
Non-prescaled clock cycles for data setup count. Used to time TSU_DAT. Data is driven SUDAT cycles after TWCK low detected.
This timing is used for timing the ACK/NAK bits, and any data bits driven in slave transmitter mode.
• TTOUT: SMBus TTIMEOUT Cycles
Prescaled clock cycles used to time SMBus TTIMEOUT.
• TLOWS: SMBus TLOW:SEXT Cycles
Prescaled clock cycles used to time SMBus TLOW:SEXT.
31 30 29 28 27 26 25 24
EXP - - - -
23 22 21 20 19 18 17 16
SUDAT
15 14 13 12 11 10 9 8
TTOUT
76543210
TLOWS
f
PRESCALED
f
CLK_TWIS
2 EXP 1 + = ------------------------
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23.9.4 Receive Holding Register
Name: RHR
Access Type: Read-only
Offset: 0x0C
Reset Value: 0x00000000
• RXDATA: Received Data Byte
When the RXRDY bit in the Status Register (SR) is one, this field contains a byte received from the TWI bus.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
RXDATA
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23.9.5 Transmit Holding Register
Name: THR
Access Type: Write-only
Offset: 0x10
Reset Value: 0x00000000
• TXDATA: Data Byte to Transmit
Write data to be transferred on the TWI bus here.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
TXDATA
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23.9.6 Packet Error Check Register
Name: PECR
Access Type: Read-only
Offset: 0x14
Reset Value: 0x00000000
• PEC: Calculated PEC Value
The calculated PEC value. Updated automatically by hardware after each byte has been transferred. Reset by hardware after a
STOP condition. Provided if the user manually wishes to control when the PEC byte is transmitted, or wishes to access the PEC
value for other reasons. In ordinary operation, the PEC handling is done automatically by hardware.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
PEC
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23.9.7 Status Register
Name: SR
Access Type: Read-only
Offset: 0x18
Reset Value: 0x000000002
• BTF: Byte Transfer Finished
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when byte transfer has completed.
• REP: Repeated Start Received
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when a REPEATED START condition is received.
• STO: Stop Received
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when the STOP condition is received.
• SMBDAM: SMBus Default Address Match
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when the received address matched the SMBus Default Address.
• SMBHHM: SMBus Host Header Address Match
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when the received address matched the SMBus Host Header Address.
• SMBALERTM: SMBus Alert Response Address Match
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when the received address matched the SMBus Alert Response Address.
• GCM: General Call Match
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when the received address matched the General Call Address.
• SAM: Slave Address Match
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when the received address matched the Slave Address.
• BUSERR: Bus Error
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when a misplaced START or STOP condition has occurred.
31 30 29 28 27 26 25 24
-- - -----
23 22 21 20 19 18 17 16
BTF REP STO SMBDAM SMBHHM SMBALERTM GCM SAM
15 14 13 12 11 10 9 8
- BUSERR SMBPECERR SMBTOUT - - - NAK
76 5 43210
ORUN URUN TRA - TCOMP SEN TXRDY RXRDY
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• SMBPECERR: SMBus PEC Error
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when a SMBus PEC error has occurred.
• SMBTOUT: SMBus Timeout
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when a SMBus timeout has occurred.
• NAK: NAK Received
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when a NAK was received from the master during slave transmitter operation.
• ORUN: Overrun
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when an overrun has occurred in slave receiver mode. Can only occur if CR.STREN is zero.
• URUN: Underrun
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when an underrun has occurred in slave transmitter mode. Can only occur if CR.STREN is zero.
• TRA: Transmitter Mode
0: The slave is in slave receiver mode.
1: The slave is in slave transmitter mode.
• TCOMP: Transmission Complete
This bit is cleared when the corresponding bit in SCR is written to one.
This bit is set when transmission is complete. Set after receiving a STOP after being addressed.
• SEN: Slave Enabled
0: The slave interface is disabled.
1: The slave interface is enabled.
• TXRDY: TX Buffer Ready
0: The TX buffer is full and should not be written to.
1: The TX buffer is empty, and can accept new data.
• RXRDY: RX Buffer Ready
0: No RX data ready in RHR.
1: RX data is ready to be read from RHR.
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23.9.8 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x1C
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will write a one to the corresponding bit in IMR.
31 30 29 28 27 26 25 24
-- - -----
23 22 21 20 19 18 17 16
BTF REP STO SMBDAM SMBHHM SMBALERTM GCM SAM
15 14 13 12 11 10 9 8
- BUSERR SMBPECERR SMBTOUT - - - NAK
76 5 43210
ORUN URUN - - TCOMP - TXRDY RXRDY
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23.9.9 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x20
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
-- - -----
23 22 21 20 19 18 17 16
BTF REP STO SMBDAM SMBHHM SMBALERTM GCM SAM
15 14 13 12 11 10 9 8
- BUSERR SMBPECERR SMBTOUT - - - NAK
76 5 43210
ORUN URUN - - TCOMP - TXRDY RXRDY
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23.9.10 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x24
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
This bit is cleared when the corresponding bit in IDR is written to one.
This bit is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
-- - -----
23 22 21 20 19 18 17 16
BTF REP STO SMBDAM SMBHHM SMBALERTM GCM SAM
15 14 13 12 11 10 9 8
- BUSERR SMBPECERR SMBTOUT - - - NAK
76 5 43210
ORUN URUN - - TCOMP - TXRDY RXRDY
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23.9.11 Status Clear Register
Name: SCR
Access Type: Write-only
Offset: 0x28
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in SR and the corresponding interrupt request.
31 30 29 28 27 26 25 24
-- - -----
23 22 21 20 19 18 17 16
BTF REP STO SMBDAM SMBHHM SMBALERTM GCM SAM
15 14 13 12 11 10 9 8
- BUSERR SMBPECERR SMBTOUT - - - NAK
76 5 43210
ORUN URUN - - TCOMP - - -
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23.9.12 Parameter Register
Name: PR
Access Type: Read-only
Offset: 0x2C
Reset Value: -
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
--------
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23.9.13 Version Register (VR)
Name: VR
Access Type: Read-only
Offset: 0x30
Reset Value: -
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION [11:8]
76543210
VERSION [7:0]
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23.10 Module Configuration
The specific configuration for each TWIS instance is listed in the following tables.The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 23-7. Module Clock Name
Module Name Clock Name Description
TWIS0 CLK_TWIS0 Clock for the TWIS0 bus interface
TWIS1 CLK_TWIS1 Clock for the TWIS1 bus interface
Table 23-8. Register Reset Values
Register Reset Value
VERSION 0x00000120
PARAMETER 0x00000000
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24. Inter-IC Sound Controller (IISC)
Rev: 1.0.0.0
24.1 Features
• Compliant with Inter-IC Sound (I2
S) bus specification
• Master, slave, and controller modes:
– Slave: data received/transmitted
– Master: data received/transmitted and clocks generated
– Controller: clocks generated
• Individual enable and disable of receiver, transmitter, and clocks
• Configurable clock generator common to receiver and transmitter:
– Suitable for a wide range of sample frequencies (fs), including 32kHz, 44.1kHz, 48kHz,
88.2kHz, 96kHz, and 192kHz
– 16fs to 1024fs Master Clock generated for external oversampling ADCs
• Several data formats supported:
– 32-, 24-, 20-, 18-, 16-, and 8-bit mono or stereo format
– 16- and 8-bit compact stereo format, with left and right samples packed in the same word to
reduce data transfers
• DMA interfaces for receiver and transmitter to reduce processor overhead:
– Either one DMA channel for both audio channels, or
– One DMA channel per audio channel
• Smart holding registers management to avoid audio channels mix after overrun or underrun
24.2 Overview
The Inter-IC Sound Controller (IISC) provides a 5-wire, bidirectional, synchronous, digital audio
link with external audio devices: ISDI, ISDO, IWS, ISCK, and IMCK pins.
This controller is compliant with the Inter-IC Sound (I2
S) bus specification.
The IISC consists of a Receiver, a Transmitter, and a common Clock Generator, that can be
enabled separately, to provide Master, Slave, or Controller modes with Receiver, Transmitter, or
both active.
Peripheral DMA channels, separate for the Receiver and for the Transmitter, allow a continuous
high bitrate data transfer without processor intervention to the following:
• Audio CODECs in Master, Slave, or Controller mode
• Stereo DAC or ADC through dedicated I2
S serial interface
The IISC can use either a single DMA channel for both audio channels or one DMA channel per
audio channel.
The 8- and 16-bit compact stereo format allows reducing the required DMA bandwidth by transferring
the left and right samples within the same data word.
In Master Mode, the IISC allows outputting a 16 fs to 1024fs Master Clock, in order to provide an
oversampling clock to an external audio codec or digital signal processor (DSP).
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24.3 Block Diagram
Figure 24-1. IISC Block Diagram
24.4 I/O Lines Description
24.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
24.5.1 I/O lines
The IISC pins may be multiplexed with I/O Controller lines. The user must first program the I/O
Controller to assign the desired IISC pins to their peripheral function. If the IISC I/O lines are not
used by the application, they can be used for other purposes by the I/O Controller. It is required
to enable only the IISC inputs and outputs actually in use.
24.5.2 Power Management
If the CPU enters a sleep mode that disables clocks used by the IISC, the IISC will stop functioning
and resume operation after the system wakes up from sleep mode.I/O Controller
ISCK
IWS
ISDI
ISDO
IMCK
Receiver
Clocks
Transmitter
Peripheral Bus interface
Generic clock
PB Peripheral
Bus Bridge
Interrupt
Controller
SCIF
Power
Manager PB clock
IRQ
Peripheral
DMA
Controller
Rx
Tx
IISC
Table 24-1. I/O Lines Description
Pin Name Pin Description Type
IMCK Master Clock Output
ISCK Serial Clock Input/Output
IWS I2
S Word Select Input/Output
ISDI Serial Data Input Input
ISDO Serial Data Output Output
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24.5.3 Clocks
The clock for the IISC bus interface (CLK_IISC) is generated by the Power Manager. This clock
is enabled at reset, and can be disabled in the Power Manager. It is recommended to disable the
IISC before disabling the clock, to avoid freezing the IISC in an undefined state.
One of the generic clocks is connected to the IISC. The generic clock (GCLK_IISC) can be set to
a wide range of frequencies and clock sources. The GCLK_IISC must be enabled and configured
before use. Refer to the module configuration section for details on the GCLK_IISC used
for the IISC. The frequency for this clock has to be set as described in Table.
24.5.4 DMA
The IISC DMA handshake interfaces are connected to the Peripheral DMA Controller. Using the
IISC DMA functionality requires the Peripheral DMA Controller to be programmed first.
24.5.5 Interrupts
The IISC interrupt line is connected to the Interrupt Controller. Using the IISC interrupt requires
the Interrupt Controller to be programmed first.
24.5.6 Debug Operation
When an external debugger forces the CPU into debug mode, the IISC continues normal operation.
If this module is configured in a way that requires it to be periodically serviced by the CPU
through interrupt requests or similar, improper operation or data loss may result during
debugging.
24.6 Functional Description
24.6.1 Initialization
The IISC features a Receiver, a Transmitter, and, for Master and Controller modes, a Clock
Generator. Receiver and Transmitter share the same Serial Clock and Word Select.
Before enabling the IISC, the chosen configuration must be written to the Mode Register (MR).
The IMCKMODE, MODE, and DATALENGTH fields in the MR register must be written. If the
IMCKMODE field is written as one, then the IMCKFS field should be written with the chosen
ratio, as described in Section 24.6.5 ”Serial Clock and Word Select Generation” on page 595.
Once the Mode Register has been written, the IISC Clock Generator, Receiver, and Transmitter
can be enabled by writing a one to the CKEN, RXEN, and TXEN bits in the Control Register
(CR). The Clock Generator can be enabled alone, in Controller Mode, to output clocks to the
IMCK, ISCK, and IWS pins. The Clock Generator must also be enabled if the Receiver or the
Transmitter is enabled.
The Clock Generator, Receiver, and Transmitter can be disabled independently by writing a one
to CR.CXDIS, CR.RXDIS and/or CR.TXDIS respectively. Once requested to stop, they will only
stop when the transmission of the pending frame transmission will be completed.
24.6.2 Basic Operation
The Receiver can be operated by reading the Receiver Holding Register (RHR), whenever the
Receive Ready (RXRDY) bit in the Status Register (SR) is set. Successive values read from
RHR will correspond to the samples from the left and right audio channels for the successive
frames.
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The Transmitter can be operated by writing to the Transmitter Holding Register (RHR), whenever
the Transmit Ready (TXRDY) bit in the Status Register (SR) is set. Successive values
written to THR should correspond to the samples from the left and right audio channels for the
successive frames.
The Receive Ready and Transmit Ready bits can be polled by reading the Status Register.
The IISC processor load can be reduced by enabling interrupt-driven operation. The RXRDY
and/or TXRDY interrupt requests can be enabled by writing a one to the corresponding bit in the
Interrupt Enable Register (IER). The interrupt service routine associated to the IISC interrupt
request will then be executed whenever the Receive Ready or the Transmit Ready status bit is
set.
24.6.3 Master, Controller, and Slave Modes
In Master and Controller modes, the IISC provides the Master Clock, the Serial Clock and the
Word Select. IMCK, ISCK, and IWS pins are outputs.
In Controller mode, the IISC Receiver and Transmitter are disabled. Only the clocks are enabled
and used by an external receiver and/or transmitter.
In Slave mode, the IISC receives the Serial Clock and the Word Select from an external master.
ISCK and IWS pins are inputs.
The mode is selected by writing the MODE field of the Mode Register (MR). Since the MODE
field changes the direction of the IWS and ISCK pins, the Mode Register should only be written
when the IISC is stopped, in order to avoid unwanted glitches on the IWS and ISCK pins.
24.6.4 I2
S Reception and Transmission Sequence
As specified in the I2
S protocol, data bits are left-adjusted in the Word Select time slot, with the
MSB transmitted first, starting one clock period after the transition on the Word Select line.
Figure 24-2. I
2
S Reception and Transmission Sequence
Data bits are sent on the falling edge of the Serial Clock and sampled on the rising edge of the
Serial Clock. The Word Select line indicates the channel in transmission, a low level for the left
channel and a high level for the right channel.
The length of transmitted words can be chosen among 8, 16, 18, 20, 24, and 32 bits by writing
the MR.DATALENGTH field.
If the time slot allows for more data bits than written in the MR.DATALENGTH field, zeroes are
appended to the transmitted data word or extra received bits are discarded. If the time slot
allows for less data bits than written, the extra bits to be transmitted are not sent or the missing
bits are set to zero in the received data word.
Serial Clock ISCK
Word Select IWS
Data ISDI/ISDO MSB
Left Channel
LSB MSB
Right Channel
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24.6.5 Serial Clock and Word Select Generation
The generation of clocks in the IISC is described in Figure 24-3 on page 596.
In Slave mode, the Serial Clock and Word Select Clock are driven by an external master. ISCK
and IWS pins are inputs and no generic clock is required by the IISC.
In Master mode, the user can configure the Master Clock, Serial Clock, and Word Select Clock
through the Mode Register (MR). IMCK, ISCK, and IWS pins are outputs and a generic clock is
used to derive the IISC clocks.
Audio codecs connected to the IISC pins may require a Master Clock signal with a frequency
multiple of the audio sample frequency (fs), such as 256fs. When the IISC is in Master mode,
writing a one to MR.IMCKMODE will output GCLK_IISC as Master Clock to the IMCK pin, and
will divide GCLK_IISC to create the internal bit clock, output on the ISCK pin. The clock division
factor is defined by writing to MR.IMCKFS and MR.DATALENGTH, as described ”IMCKFS:
Master Clock to fs Ratio” on page 602.
The Master Clock (IMCK) frequency is 16*(IMCKFS+1) times the sample frequency (fs), i.e. IWS
frequency. The Serial Clock (ISCK) frequency is 2*Slot Length times the sample frequency (fs),
where Slot Length is defined in Table 24-2 on page 595.
Warning: MR.IMCKMODE should only be written as one if the Master Clock frequency is strictly
higher than the Serial Clock.
If a Master Clock output is not required, the GCLK_IISC generic clock is used as ISCK, by writing
a zero to MR.IMCKMODE. Alternatively, if the frequency of the generic clock used is a
multiple of the required ISCK frequency, the IMCK to ISCK divider can be used with the ratio
defined by writing the MR.IMCKFS field.
The IWS pin is used as Word Select as described in Section 24.6.4.
Table 24-2. Slot Length
MR.DATALENGTH Word Length Slot Length
0 32 bits 32
1 24 bits
32 if MR.IWS24 is zero
24 if MR.IWS24 is one 2 20 bits
3 18 bits
4 16 bits
16
5 16 bits compact stereo
6 8 bits
8
7 8 bits compact stereo
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Figure 24-3. IISC Clocks Generation
24.6.6 Mono
When the Transmit Mono (TXMONO) in the Mode Register is set, data written to the left channel
is duplicated to the right output channel.
When the Receive Mono (RXMONO) in the Mode Register is set, data received from the left
channel is duplicated to the right channel.
24.6.7 Holding Registers
The IISC user interface includes a Receive Holding Register (RHR) and a Transmit Holding
Register (THR). RHR and THR are used to access audio samples for both audio channels.
When a new data word is available in the RHR register, the Receive Ready bit (RXRDY) in the
Status Register (SR) is set. Reading the RHR register will clear this bit.
A receive overrun condition occurs if a new data word becomes available before the previous
data word has been read from the RHR register. Then, the Receive Overrun bit in the Status
Register will be set and bit i of the RXORCH field in the Status Register is set, where i is the current
receive channel number.
When the THR register is empty, the Transmit Ready bit (TXRDY) in the Status Register (SR) is
set. Writing into the THR register will clear this bit.
A transmit underrun condition occurs if a new data word needs to be transmitted before it has
been written to the THR register. Then, the Transmit Underrun bit in the Status Register will be
set and bit i of the TXORCH field in the Status Register is set, where i is the current transmit
channel number. If the TXSAME bit in the Mode Register is zero, then a zero data word is transmitted
in case of underrun. If MR.TXSAME is one, then the previous data word for the current
transmit channel number is transmitted.
MR.MODE = SLAVE Clock
divider MR.DATALENGTH
GCLK_IISC Clock
enable
Clock
divider
CR.CKEN/CKDIS MR.IMCKMODE
MR.DATALENGTH
MR.IMCKFS
MR.IMCKMODE 0 1
IMCK pin output
Clock
enable
CR.CKEN/CKDIS
Internal
bit clock ISCK pin input 1
0
ISCK pin output
Internal
word clock IWS pin input 1
0
IWS pin output
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Data words are right-justified in the RHR and THR registers. For 16-bit compact stereo, the left
sample uses bits 15 through 0 and the right sample uses bits 31 through 16 of the same data
word. For 8-bit compact stereo, the left sample uses bits 7 through 0 and the right sample uses
bits 15 through 8 of the same data word.
24.6.8 DMA Operation
The Receiver and the Transmitter can each be connected either to one single Peripheral DMA
channel or to one Peripheral DMA channel per data channel. This is selected by writing to the
MR.RXDMA and MR.TXDMA bits. If a single Peripheral DMA channel is selected, all data samples
use IISC Receiver or Transmitter DMA channel 0.
The Peripheral DMA reads from the RHR register and writes to the RHR register for both audio
channels, successively.
The Peripheral DMA transfers may use 32-bit word, 16-bit halfword, or 8-bit byte according to
the value of the MR.DATALENGTH field.
24.6.9 Loop-back Mode
For debugging purposes, the IISC can be configured to loop back the Transmitter to the
Receiver. Writing a one to the MR.LOOP bit will internally connect ISDO to ISDI, so that the
transmitted data is also received. Writing a zero to MR.LOOP will restore the normal behavior
with independent Receiver and Transmitter. As for other changes to the Receiver or Transmitter
configuration, the IISC Receiver and Transmitter must be disabled before writing to the MR register
to update MR.LOOP.
24.6.10 Interrupts
An IISC interrupt request can be triggered whenever one or several of the following bits are set
in the Status Register (SR): Receive Ready (RXRDY), Receive Overrun (RXOR), Transmit
Ready (TXRDY), or Transmit Underrun (TXOR).
The interrupt request will be generated if the corresponding bit in the Interrupt Mask Register
(IMR) is set. Bits in IMR are set by writing a one to the corresponding bit in the Interrupt Enable
Register (IER), and cleared by writing a one to the corresponding bit in the Interrupt Disable
Register (IDR). The interrupt request remains active until the corresponding bit in SR is cleared
by writing a one the corresponding bit in the Status Clear Register (SCR).
For debugging purposes, interrupt requests can be simulated by writing a one to the corresponding
bit in the Status Set Register (SSR).
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Figure 24-4. Interrupt Block Diagram
24.7 IISC Application Examples
The IISC can support several serial communication modes used in audio or high-speed serial
links. Some standard applications are shown in the following figures. All serial link applications
supported by the IISC are not listed here.
Figure 24-5. Audio Application Block Diagram
IER IDR IMR
Set Clear
Interrupt
Control
IISC Interrupt
Request
TXRDY
TXUR
Transmitter
Receiver
RXRDY
RXOR
Serial Clock
Word Select
Serial Data Out MSB LSB MSB
Serial Data Out
Word Select
Serial Clock
IISC
ISCK
IWS
ISDO
ISDI
EXTERNAL
I
2
S
RECEIVER
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Figure 24-6. Codec Application Block Diagram
Figure 24-7. Time Slot Application Block Diagram
IISC Word Select
Serial Data Out
Serial Data In
EXTERNAL
AUDIO
CODEC
IMCK
IWS
ISDO
ISDI
Serial Clock
Master Clock
ISCK
Right Time Slot
Serial Clock
Word Select
Serial Data Out
Serial Data In
Dstart Dend
Left Time Slot
EXTERNAL
AUDIO
CODEC
for Left
Time Slot
EXTERNAL
AUDIO
CODEC
for Right
Time Slot
Serial Data In
Serial Data Out
Word Select
Serial Clock
Serial Clock
Word Select
Serial Data Out
Serial Data In
Dstart
Left Time Slot Right Time Slot
Dend
IISC
ISCK
IWS
ISDO
ISDI
Master Clock IMCK
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24.8 User Interface
Note: 1. The reset values for these registers are device specific. Please refer to the Module Configuration section at the end of this
chapter.
Table 24-3. IISC Register Memory Map
Offset Register Register Name Access Reset
0x00 Control Register CR Write-only 0x00000000
0x04 Mode Register MR Read/Write 0x00000000
0x08 Status Register SR Read-only 0x00000000
0x0C Status Clear Register SCR Write-only 0x00000000
0x10 Status Set Register SSR Write-only 0x00000000
0x14 Interrupt Enable Register IER Write-only 0x00000000
0x18 Interrupt Disable Register IDR Write-only 0x00000000
0x1C Interrupt Mask Register IMR Read-only 0x00000000
0x20 Receiver Holding Register RHR Read-only 0x00000000
0x24 Transmitter Holding Register THR Write-only 0x00000000
0x28 Version Register VERSION Read-only -
(1)
0x2C Parameter Register PARAMETER Read-only -
(1)
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24.8.1 Control Register
Name: CR
Access Type: Write-only
Offset: 0x00
Reset Value: 0x00000000
The Control Register should only be written to enable the IISC after the chosen configuration has been written to the Mode
Register, in order to avoid unwanted glitches on the IWS, ISCK, and ISDO outputs. The proper sequence is to write the MR
register, then write the CR register to enable the IISC, or to disable the IISC before writing a new value into MR.
• SWRST: Software Reset
Writing a zero to this bit has no effect.
Writing a one to this bit resets all the registers in the module. The module will be disabled after the reset.
This bit always reads as zero.
• TXDIS: Transmitter Disable
Writing a zero to this bit has no effect.
Writing a one to this bit disables the IISC Transmitter. SR.TXEN will be cleared when the Transmitter is effectively stopped.
• TXEN: Transmitter Enable
Writing a zero to this bit has no effect.
Writing a one to this bit enables the IISC Transmitter, if TXDIS is not one. SR.TXEN will be set when the Transmitter is effectively
started.
• CKDIS: Clocks Disable
Writing a zero to this bit has no effect.
Writing a one to this bit disables the IISC clocks generation.
• CKEN: Clocks Enable
Writing a zero to this bit has no effect.
Writing a one to this bit enables the IISC clocks generation, if CKDIS is not one.
• RXDIS: Receiver Disable
Writing a zero to this bit has no effect.
Writing a one to this bit disables the IISC Receiver. SR.TXEN will be cleared when the Transmitter is effectively stopped.
• RXEN: Receiver Enable
Writing a zero to this bit has no effect.
Writing a one to this bit enables the IISC Receiver, if RXDIS is not one. SR.RXEN will be set when the Receiver is effectively
started.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
SWRST - TXDIS TXEN CKDIS CKEN RXDIS RXEN
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24.8.2 Mode Register
Name: MR
Access Type: Read/Write
Offset: 0x04
Reset Value: 0x00000000
The Mode Register should only be written when the IISC is stopped, in order to avoid unwanted glitches on the IWS, ISCK,
and ISDO outputs. The proper sequence is to write the MR register, then write the CR register to enable the IISC, or to disable
the IISC before writing a new value into MR.
• IWS24: IWS TDM Slot Width
0: IWS slot is 32-bit wide for DATALENGTH=18/20/24-bit
1: IWS slot is 24-bit wide for DATALENGTH=18/20/24-bit
Refer to Table 24-2, “Slot Length,” on page 595.
• IMCKMODE: Master Clock Mode
0: No Master Clock generated (generic clock is used as ISCK output)
1: Master Clock generated (generic clock is used as IMCK output)
Warning: if IMCK frequency is the same as ISCK, IMCKMODE should not be written as one. Refer to Section 24.6.5 ”Serial
Clock and Word Select Generation” on page 595 and Table 24-2, “Slot Length,” on page 595.
• IMCKFS: Master Clock to fs Ratio
Master Clock frequency is 16*(IMCKFS+1) times the sample rate, i.e. IWS frequency:
31 30 29 28 27 26 25 24
IWS24 IMCKMODE IMCKFS
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- TXSAME TXDMA TXMONO RXLOOP RXDMA RXMONO
76543210
- - - DATALENGTH - MODE
Table 24-4. Master Clock to Sample Frequency (fs) Ratio
fs Ratio IMCKFS
16 fs 0
32 fs 1
48fs 2
64 fs 3
96fs 5
128 fs 7
192fs 11
256 fs 15
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• TXSAME: Transmit Data when Underrun
0: Zero sample transmitted when underrun
1: Previous sample transmitted when underrun
• TXDMA: Single or multiple DMA Channels for Transmitter
0: Transmitter uses a single DMA channel for both audio channels
1: Transmitter uses one DMA channel per audio channel
• TXMONO: Transmit Mono
0: Stereo
1: Mono, with left audio samples duplicated to right audio channel by the IISC
• RXLOOP: Loop-back Test Mode
0: Normal mode
1: ISDO output of IISC is internally connected to ISDI input
• RXMONO: Receive Mono
0: Stereo
1: Mono, with left audio samples duplicated to right audio channel by the IISC
• RXDMA: Single or multiple DMA Channels for Receiver
0: Receiver uses a single DMA channel for both audio channels
1: Receiver uses one DMA channel per audio channel-
• DATALENGTH: Data Word Length
• MODE: Mode
384 fs 23
512 fs 31
768 fs 47
1024 fs 63
Table 24-5. Data Word Length
DATALENGTH Word Length Comments
0 32 bits
1 24 bits
2 20 bits
3 18 bits
4 16 bits
5 16 bits compact stereo Left sample in bits 15 through 0 and right sample in bits 31 through 16 of the same word
6 8 bits
7 8 bits compact stereo Left sample in bits 7 through 0 and right sample in bits 15 through 8 of the same word
Table 24-6. Mode
MODE Comments
0 SLAVE ISCK and IWS pin inputs used as Bit Clock and Word Select/Frame Sync.
1 MASTER Bit Clock and Word Select/Frame Sync generated by IISC from GCLK_IISC and output to ISCK and IWS pins.
GCLK_IISC is output as Master Clock on IMCK if MR.IMCKMODE is one.
Table 24-4. Master Clock to Sample Frequency (fs) Ratio
fs Ratio IMCKFS
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24.8.3 Status Register
Name: SR
Access Type: Read-only
Offset: 0x08
Reset Value: 0x00000000
• TXURCH: Transmit Underrun Channel
This field is cleared when SCR.TXUR is written to one
Bit i of this field is set when a transmit underrun error occurred in channel i (i=0 for first channel of the frame)
• RXORCH: Receive Overrun Channel
This field is cleared when SCR.RXOR is written to one
Bit i of this field is set when a receive overrun error occurred in channel i (i=0 for first channel of the frame)
• TXUR: Transmit Underrun
This bit is cleared when the corresponding bit in SCR is written to one
This bit is set when an underrun error occurs on the THR register or when the corresponding bit in SSR is written to one
• TXRDY: Transmit Ready
This bit is cleared when data is written to THR
This bit is set when the THR register is empty and can be written with new data to be transmitted
• TXEN: Transmitter Enabled
This bit is cleared when the Transmitter is effectively disabled, following a CR.TXDIS or CR.SWRST request
This bit is set when the Transmitter is effectively enabled, following a CR.TXEN request
• RXOR: Receive Overrun
This bit is cleared when the corresponding bit in SCR is written to one
This bit is set when an overrun error occurs on the RHR register or when the corresponding bit in SSR is written to one
• RXRDY: Receive Ready
This bit is cleared when the RHR register is read
This bit is set when received data is present in the RHR register
• RXEN: Receiver Enabled
This bit is cleared when the Receiver is effectively disabled, following a CR.RXDIS or CR.SWRST request
This bit is set when the Receiver is effectively enabled, following a CR.RXEN request
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - TXURCH - - - -
15 14 13 12 11 10 9 8
- - - - - - RXORCH
76543210
- TXUR TXRDY TXEN - RXOR RXRDY RXEN
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24.8.4 Status Clear Register
Name: SCR
Access Type: Write-only
Offset: 0x0C
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in SR and the corresponding interrupt request.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - TXURCH - - - -
15 14 13 12 11 10 9 8
- - - - - - RXORCH
76543210
- TXUR - - - RXOR - -
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24.8.5 Status Set Register
Name: SSR
Access Type: Write-only
Offset: 0x10
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in SR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - TXURCH - - - -
15 14 13 12 11 10 9 8
- - - - - - RXORCH
76543210
- TXUR - - - RXOR - -
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24.8.6 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x14
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- TXUR TXRDY - - RXOR RXRDY -
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24.8.7 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x18
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- TXUR TXRDY - - RXOR RXRDY -
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24.8.8 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x1C
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- TXUR TXRDY - - RXOR RXRDY -
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24.8.9 Receive Holding Register
Name: RHR
Access Type: Read-only
Offset: 0x20
Reset Value: 0x00000000
• RHR: Received Word
This field is set by hardware to the last received data word. If MR.DATALENGTH specifies less than 32 bits, data shall be rightjustified
into the RHR field.
31 30 29 28 27 26 25 24
RHR[31:24]
23 22 21 20 19 18 17 16
RHR[23:16]
15 14 13 12 11 10 9 8
RHR[15:8]
76543210
RHR[7:0]
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24.8.10 Transmit Holding Register
Name: THR
Access Type: Write-only
Offset: 0x24
Reset Value: 0x00000000
• THR: Data Word to Be Transmitted
Next data word to be transmitted after the current word if TXRDY is not set. If MR.DATALENGTH specifies less than 32 bits, data
shall be right-justified into the THR field.
31 30 29 28 27 26 25 24
THR[31:24]
23 22 21 20 19 18 17 16
THR[23:16]
15 14 13 12 11 10 9 8
THR[15:8]
76543210
THR[7:0]
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24.8.11 Module Version
Name: VERSION
Access Type: Read-only
Offset: 0x28
Reset Value: -
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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24.8.12 Module Parameters
Name: PARAMETER
Access Type: Read-only
Offset: 0x2C
Reset Value: -
Reserved. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
--------
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24.9 Module configuration
The specific configuration for each IISC instance is listed in the following tables. The module bus
clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 24-7. IISC Clocks
Clock Name Description
CLK_IISC Clock for the IISC bus interface
GCLK The generic clock used for the IISC is GCLK6
Table 24-8. Register Reset Values
Register Reset Value
VERSION 0x00000100
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25. Pulse Width Modulation Controller (PWMA)
Rev: 2.0.1.0
25.1 Features
• Left-aligned non-inverted 12-bit PWM
• Common 12-bit timebase counter
– Asynchronous clock source supported
– Spread-spectrum counter to allow a constantly varying duty cycle
• Separate 12-bit duty cycle register per channel
• Synchronized channel updates
– No glitches when changing the duty cycles
• Interlinked operation supported
– Up to 32 channels can be updated with the same duty cycle value at a time
– Up to 4 channels can be updated with different duty cycle values at a time
• Interrupt on PWM timebase overflow
• Incoming peripheral events supported
– Pre-defined channels support incoming (increase/decrease) peripheral events from the
Peripheral Event System
– Incoming increase/decrease event can either increase or decrease the duty cycle by one
• One output peripheral event supported
– Connected to channel 0 and asserted when the common timebase counter is equal to the
programmed duty cycle for channel 0
• Output PWM waveforms
– Support normal waveform output for each channel
– Support composite waveform generation (XOR’ed) for each pair channels
• Open drain driving on selected pins for 5V PWM operation
25.2 Overview
The Pulse Width Modulation Controller (PWMA) controls several pulse width modulation (PWM)
channels. The number of channels is specific to the device. Each channel controls one square
output PWM waveform. Characteristics of the output PWM waveforms such as period and duty
cycle are configured through the user interface. All user interface registers are mapped on the
peripheral bus.
The duty cycle value for each channel can be set independently, while the period is determined
by a common timebase counter (TC). The timebase for the counter is selected by using the allocated
asynchronous Generic Clock (GCLK). The user interface for the PWMA contains
handshake and synchronizing logic to ensure that no glitches occur on the output PWM waveforms
while changing the duty cycle values.
PWMA duty cycle values can be changed using two approaches, either an interlinked singlevalue
mode or an interlinked multi-value mode. In the interlinked single-value mode, any set of
channels, up to 32 channels, can be updated simultaneously with the same value while the other
channels remain unchanged. There is also an interlinked multi-value mode, where the 8 least
significant bits of up to 4 channels can be updated with 4 different values while the other channels
remain unchanged.
Some pins can be driven in open drain mode, allowing the PWMA to generate a 5V waveform
using an external pullup resistor.
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25.3 Block Diagram
Figure 25-1. PWMA Block Diagram
25.4 I/O Lines Description
Each channel outputs one PWM waveform on one external I/O line.
25.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
PWM Blocks
Channel m
Channel 1
Channel 0
Duty Cycle
Register
COMP
PWMA[m:0]
Interrupt
Handling
IRQ
PB
TOP
Timebase
Counter
SPREAD
Adjust
TOFL
READY
Channel_0
CLK_PWMA
GCLK Domain
PB Clock Domain
Spread
Spectrum
Counter
Sync
GCLK ETV
Control
Duty Cycle Channel
Select WAVEXOR
CWG
TCLR CHERR
Table 25-1. I/O Line Description
Pin Name Pin Description Type
PWMA[n] Output PWM waveform for one channel n Output
PWMMOD[n] Output PWM waveform for one channel n, open drain mode Output
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25.5.1 I/O Lines
The pins used for interfacing the PWMA may be multiplexed with I/O Controller lines. The programmer
must first program the I/O Controller to assign the desired PWMA pins to their
peripheral function.
It is only required to enable the PWMA outputs actually in use.
25.5.2 Power Management
If the CPU enters a sleep mode that disables clocks used by the PWMA, the PWMA will stop
functioning and resume operation after the system wakes up from sleep mode.
25.5.3 Clocks
The clock for the PWMA bus interface (CLK_PWMA) is controlled by the Power Manager. This
clock is enabled at reset, and can be disabled in the Power Manager. It is recommended to disable
the PWMA before disabling the clock, to avoid freezing the PWMA in an undefined state.
Additionally, the PWMA depends on a dedicated Generic Clock (GCLK). The GCLK can be set
to a wide range of frequencies and clock sources and must be enabled in the System Control
Interface (SCIF) before the PWMA can be used.
25.5.4 Interrupts
The PWMA interrupt request lines are connected to the interrupt controller. Using the PWMA
interrupts requires the interrupt controller to be programmed first.
25.5.5 Peripheral Events
The PWMA peripheral events are connected via the Peripheral Event System. Refer to the
Peripheral Event System chapter for details.
25.5.6 Debug Operation
When an external debugger forces the CPU into debug mode, the PWMA continues normal
operation. If the PWMA is configured in a way that requires it to be periodically serviced by the
CPU through interrupts, improper operation or data loss may result during debugging.
25.6 Functional Description
The PWMA embeds a number of PWM channel submodules, each providing an output PWM
waveform. Each PWM channel contains a duty cycle register and a comparator. A common
timebase counter for all channels determines the frequency and the period for all the PWM
waveforms.
25.6.1 Enabling the PWMA
Once the GCLK has been enabled, the PWMA is enabled by writing a one to the EN bit in the
Control Register (CR).
25.6.2 Timebase Counter
The top value of the timebase counter defines the period of the PWMA output waveform. The
timebase counter starts at zero when the PWMA is enabled and counts upwards until it reaches
its effective top value (ETV). The effective top value is defined by specifying the desired number
of GCLK clock cycles in the TOP field of Top Value Register (TVR.TOP) in normal operation (the
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SPREAD field of CR (CR.SPREAD) is zero). When the timebase counter reaches its effective
top value, it restarts counting from zero. The period of the PWMA output waveform is then:
The timebase counter can be reset by writing a one to the Timebase Clear bit in CR (CR.TCLR).
Note that this can cause a glitch to the output PWM waveforms in use.
25.6.3 Spread Spectrum Counter
The spread spectrum counter allows the generation of constantly varying duty cycles on the output
PWM waveforms. This is achieved by varying the effective top value of the timebase counter
in a range defined by the spread spectrum counter value.
When CR.SPREAD is not zero, the spread spectrum counter is enabled. Its range is defined by
CR.SPREAD. It starts to count from -CR.SPREAD when the PWMA is enabled or after reset
and counts upwards. When it reaches CR.SPREAD, it restarts to count from -CR.SPREAD
again. The spread spectrum counter will cause the effective top value to vary from TOPSPREAD
to TOP+SPREAD. Figure 25-2 on page 618 illustrates this. This leads to a constantly
varying duty cycle on the PWM output waveforms though the duty cycle values stored are
unchanged.
Figure 25-2. PWMA Adjusting Top Value for Timebase Counter
25.6.3.1 Special considerations
The maximum value of the timebase counter is 0x0FFF. If SPREAD is written to a value that will
cause the ETV to exceed this value, the spread spectrum counter’s range will be limited to prevent
the timebase counter to exceed its maximum value.
If SPREAD is written to a value causing (TOP-SPREAD) to be below zero, the spread spectrum
counter’s range will be limited to prevent the timebase counter to count below zero.
In both cases, the SPREAD value read from the Control Register will be the same value as written
to the SPREAD field.
TPWMA ETV + 1 TGCLK =
0x0
0x0FFF
Duty Cycle
-SPREAD
SPREAD
TOP Adjusting top value range
for the timerbase counter
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When writing a one to CR.TCLR, the timebase counter and the spread spectrum counter are
reset at their lower limit values and the effective top value of the timebase counter will also be
reset.
25.6.4 Duty Cycle and Waveform Properties
Each PWM channel has its own duty cycle value (DCV) which is write-only and cannot be read
out. The duty cycle value can be changed in two approaches as described in Section25.6.6.
When the duty cycle value is zero, the PWM output is zero. Otherwise, the PWM output is set
when the timebase counter is zero, and cleared when the timebase counter reaches the duty
cycle value. This is summarized as:
Note that when increasing the duty cycle value for one channel from 0 to 1, the number of GCLK
cycles when the PWM waveform is high will jump from 0 to 2. When incrementing the duty cycle
value by one for any other values, the number of GCLK cycle when the waveform is high will
increase by one. This is summarized in Table 25-2.
25.6.5 Waveform Output
PWMA waveforms are output to I/O lines. The output waveform properties are controlled by
Composite Waveform Generation (CWG) register(s). If this register is cleared (by default), the
channel waveforms are out directly to the I/O lines. To avoid too many I/O toggling simultaneously
on the output I/O lines, every other output PWM waveform toggles on the negative edge of
the GCLK instead of the positive edge.
In CWG mode, all channels are paired and their outputs are XOR’ed together if the corresponding
bit of CWG register is set. The even number of output is the XOR’ed output and the odd
number of output is the inverse of its. Each bit of CWG register controls one pair channels and
the least significant bit refers to the lowest number of pair channels.
25.6.6 Updating Duty Cycle Values
25.6.6.1 Interlinked Single Value PWM Operation
The PWM channels can be interlinked to allow multiple channels to be updated simultaneously
with the same duty cycle value. This value must be written to the Interlinked Single Value Duty
Table 25-2. PMW Waveform Duty Cycles
Duty Cycle Value
#Clock Cycles
When Waveform is High
#Clock Cycles
When Waveform is Low
0 0 ETV+1
1 2 ETV-1
2 3 ETV-2
... ... ...
ETV-1 ETV 1
ETV ETV+1 0
PWM Waveform = low when DCV = 0 or TC DCV
high when TC DCV and DCV 0
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(ISDUTY) register. Each channel has a corresponding enabling bit in the Interlinked Single
Value Channel Set (ISCHSET) register(s). When a bit is written to one in the ISCHSET register,
the duty cycle register for the corresponding channel will be updated with the value stored in the
ISDUTY register. It can only be updated when the READY bit in the Status Register
(SR.READY) is one, indicating that the PWMA is ready for writing. Figure 25-3 on page 620
shows the writing procedure. It is thus possible to update the duty cycle values for up to 32 PWM
channels within one ISCHSET register at a time.
Figure 25-3. Interlinked Single Value PWM Operation Flow
25.6.6.2 Interlinked Multiple Value PWM Operation
The interlinked multiple value PWM operation allows up to four channels to be updated simultaneously
with different duty cycle values. The four duty cycle values are required to be written to
the four registers, DUTY3, DUTY2, DUTY1 and DUTY0 , respectively. The index number of the
four channels to be updated is written to the four SEL fields in the Interlinked Multiple Value
Channel Select (IMCHSEL) register (IMCHSEL.SEL). When the IMCHSEL register is written,
the values stored in the DUTY0/1/2/3 registers are synchronized to the duty cycle registers for
the channels selected by the SEL fields. Figure 25-4 on page 620 shows the writing procedure.
Note that only writes to the implemented channels will be effective. If one of the IMCHSEL.SEL
fields points to a non-existing channel, the corresponding value in the DUTYx register will not be
written. If the same channel is specified multiple times in the IMCHSEL.SEL fields, the channel
will be updated with the value referred by the upper IMCHSEL.SEL field.
When only the least significant 8-bits duty cycle value are considered for updating, the four duty
cycle values can be written to the IMDUTY register once. This is equivalent to writing the four
duty cycle values to the four DUTY registers one by one.
Figure 25-4. Interlinked Multiple Value PWM Operation Flow
ISCHSETm
...
Write
Enable
Channeln
DUTY
Channel1
DUTY
Channel0
DUTY
ISDUTY
Channel2
DUTY
DUTY3/2/1/0
IMDUTY IMCHSEL
Channeln
DUTY
...
MUX
Channel1
DUTY
Channel0
DUTY
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25.6.7 Open Drain Mode
Some pins can be used in open drain mode, allowing the PWMA waveform to toggle between
0V and up to 5V on these pins. In this mode the PWMA will drive the pin to zero or leave the output
open. An external pullup can be used to pull the pin up to the desired voltage.
To enable open drain mode on a pin the PWMAOD function must be selected instead of the
PWMA function in the I/O Controller. Please refer to the Module Configuration chapter for information
about which pins are available in open drain mode.
25.6.8 Synchronization
Both the timebase counter and the spread spectrum counter can be reset and the duty cycle
registers can be written through the user interface of the module. This requires a synchronization
between the PB and GCLK clock domains, which takes a few clock cycles of each clock
domain. The BUSY bit in SR indicates when the synchronization is ongoing. Writing to the module
while the BUSY bit is set will result in discarding the new value.
Note that the duty cycle registers will not be updated with the new values until the timebase
counter reaches its top value, in order to avoid glitches. The BUSY bit in SR will always be set
during this updating and synchronization period.
25.6.9 Interrupts
When the timebase counter overflows, the Timebase Overflow bit in the Status Register
(SR.TOFL) is set. If the corresponding bit in the Interrupt Mask Register (IMR) is set, an interrupt
request will be generated.
Since the user needs to wait until the user interface is available between each write due to synchronization,
a READY bit is provided in SR, which can be used to generate an interrupt
request.
The interrupt request will be generated if the corresponding bit in IMR is set. Bits in IMR are set
by writing a one to the corresponding bit in the Interrupt Enable Register (IER), and cleared by
writing a one to the corresponding bit in the Interrupt Disable Register (IDR). The interrupt
request remains active until the corresponding bit in SR is cleared by writing a one to the corresponding
bit in the Status Clear Register (SCR).
25.6.10 Peripheral Events
25.6.10.1 Input Peripheral Events
The pre-defined channels support input peripheral events from the Peripheral Event System.
Input peripheral events must be enabled by writing a one to the corresponding bit in the Channel
Event Enable Registers (CHEERs) before peripheral events can be used to control the duty
cycle value. Each bit in the register corresponds to one channel, where bit 0 corresponds to
channel 0 and so on. Both the increase and decrease events are enabled for the corresponding
channel when a bit in the CHEER register is set.
An increase or decrease event (event_incr/event_decr) can either increase or decrease the duty
cycle value by one in a PWM period. The events are taken into account when the common timebase
counter reaches its top. The behavior is defined by the Channel Event Response Register
(CHERR). Each bit in the register corresponds to one channel, where bit 0 corresponds to channel
0 and so on. If the bit in CHERR is set to 0 (default) for a channel, the increase event will
increase the duty cycle value and the decrease event will decrease the duty cycle value for that
channel. If the bit is set to 1, the increase and decrease event will have reverse function so that
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the increase event will decrease the duty cycle value and decrease event will increase the duty
cycle value. If both the increase event and the decrease event occur at the same time for a
channel, the duty cycle value will not be changed.
The number of channels supporting input peripheral events is device specific. Please refer to the
Module Configuration section at the end of this chapter for details.
25.6.10.2 Output Peripheral Event
The PWMA also supports one output peripheral event (event_ch0) to the Peripheral Event System.
This output peripheral event is connected to channel 0 and will be asserted when the
timebase counter reaches the duty cycle value for channel 0. This output event is always
enabled.
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25.7 User Interface
Note: 1. The reset values are device specific. Please refer to the Module Configuration section at the end of this chapter.
Table 25-3. PWMA Register Memory Map
Offset Register Register Name Access Reset
0x00 Control Register CR Read/Write 0x00000000
0x04 Interlinked Single Value Duty Register ISDUTY Write-only 0x00000000
0x08 Interlinked Multiple Value Duty Register IMDUTY Write-only 0x00000000
0x0C Interlinked Multiple Value Channel Select IMCHSEL Write-only 0x00000000
0x10 Interrupt Enable Register IER Write-only 0x00000000
0x14 Interrupt Disable Register IDR Write-only 0x00000000
0x18 Interrupt Mask Register IMR Read-only 0x00000000
0x1C Status Register SR Read-only 0x00000000
0x20 Status Clear Register SCR Write-only 0x00000000
0x24 Parameter Register PARAMETER Read-only - (1)
0x28 Version Register VERSION Read-only - (1)
0x2C Top Value Register TVR Read/Write 0x00000000
0x30+m*0x10 Interlinked Single Value Channel Set m ISCHSETm Write-only 0x00000000
0x34+m*0x10 Channel Event Response Register m CHERRm Read/Write 0x00000000
0x38+m*0x10 Channel Event Enable Register m CHEERm Read/Write 0x00000000
0x3C+k*0x10 CWG Register CWGk Read/Write 0x00000000
0x80 Interlinked Multiple Value Duty0 Register DUTY0 Write-only 0x00000000
0x84 Interlinked Multiple Value Duty1 Register DUTY1 Write-only 0x00000000
0x88 Interlinked Multiple Value Duty2 Register DUTY2 Write-only 0x00000000
0x8C Interlinked Multiple Value Duty3 Register DUTY3 Write-only 0x00000000
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25.7.1 Control Register
Name: CR
Access Type: Read/Write
Offset: 0x00
Reset Value: 0x00000000
• SPREAD: Spread Spectrum Limit Value
The spread spectrum limit value, together with the TOP field, defines the range for the spread spectrum counter. It is introduced
in order to achieve constant varying duty cycles on the output PWM waveforms. Refer to Section25.6.3 for more information.
• TOP: Timebase Counter Top Value
The top value for the timebase counter. The value written to this field will update the least significant 8 bits of the TVR.TOP field
in case only 8-bits resolution is required. The 4 most significant bits of TVR.TOP will be written to 0. When the TVR.TOP field is
written, this CR.TOP field will also be updated with only the least significant 8 bits of TVR.TOP field.
• TCLR: Timebase Clear
Writing a zero to this bit has no effect.
Writing a one to this bit will clear the timebase counter.
This bit is always read as zero.
• EN: Module Enable
0: The PWMA is disabled
1: The PWMA is enabled
31 30 29 28 27 26 25 24
- - - - - - - SPREAD[8]
23 22 21 20 19 18 17 16
SPREAD[7:0]
15 14 13 12 11 10 9 8
TOP
76543210
- - - - - - TCLR EN
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25.7.2 Interlinked Single Value Duty Register
Name: ISDUTY
Access Type: Write-only
Offset: 0x04
Reset Value: 0x00000000
• DUTY: Duty Cycle Value
The duty cycle value written to this field is written simultaneously to all channels selected in the ISCHSETm register.
If the value zero is written to DUTY all affected channels will be disabled. In this state the output waveform will be zero all the
time.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - DUTY[11:8]
76543210
DUTY[7:0]
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25.7.3 Interlinked Multiple Value Duty Register
Name: IMDUTY
Access Type: Write-only
Offset: 0x08
Reset Value: 0x00000000
• DUTYn: Duty Cycle
The value written to DUTY field n will be automatically written to the least significant 8 bits of the DUTYn register for a PWMA
channel while the most significant 4bits of the DUTYn register are unchanged. Which channel is selected for updating is defined
by the corresponding SEL field in the IMCHSEL register.
To write mulitple channels at a time with more than 8 bits of the duty cycle value, refer to DUTY3/2/1/0 registers.
If the value zero is written to DUTY all affected channels will be disabled. In this state the output waveform will be zero all the
time.
31 30 29 28 27 26 25 24
DUTY3
23 22 21 20 19 18 17 16
DUTY2
15 14 13 12 11 10 9 8
DUTY1
76543210
DUTY0
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25.7.4 Interlinked Multiple Value Channel Select
Name: IMCHSEL
Access Type: Write-only
Offset: 0x0C
Reset Value: 0x00000000
• SELn: Channel Select
The duty cycle of the PWMA channel SELn will be updated with the value stored in the DUTYn register when IMCHSEL is
written. If SELn points to a non-implemented channel, the write will be discarded.
Note: The duty registers will be updated with the value stored in the DUTY3, DUTY2, DUTY1 and DUTY0 registers when the IMCHSEL
register is written. Synchronization takes place immediately when an IMCHSEL register is written. The duty cycle registers
will, however, not be updated until the synchronization is completed and the timebase counter reaches its top value in order to
avoid glitches. When only 8 bits duty cycle value are considered for updating, the four duty cycle values can be written to the
IMDUTY register once. This is equivalent to writing the 8 bits four duty cycle values to the four DUTY registers one by one while
the upper 4 bits remain unchanged.
31 30 29 28 27 26 25 24
SEL3
23 22 21 20 19 18 17 16
SEL2
15 14 13 12 11 10 9 8
SEL1
76543210
SEL0
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25.7.5 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x10
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - READY - TOFL
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25.7.6 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x14
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - READY - TOFL
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25.7.7 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x18
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - READY - TOFL
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25.7.8 Status Register
Name: SR
Access Type: Read-only
Offset: 0x1C
Reset Value: 0x00000000
• BUSY: Interface Busy
This bit is automatically cleared when the interface is no longer busy.
This bit is set when the user interface is busy and will not respond to new write operations.
• READY: Interface Ready
This bit is cleared by writing a one to the corresponding bit in the SCR register.
This bit is set when the BUSY bit has a 1-to-0 transition.
• TOFL: Timebase Overflow
This bit is cleared by writing a one to corresponding bit in the SCR register.
This bit is set when the timebase counter has wrapped at its top value.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - BUSY READY - TOFL
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25.7.9 Status Clear Register
Name: SCR
Access Type: Write-only
Offset: 0x20
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in SR and the corresponding interrupt request.
This register always reads as zero.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 1 10 9 8
--------
76543210
- - - - - READY - TOFL
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25.7.10 Parameter Register
Name: PARAMETER
Access Type: Read-only
Offset: 0x24
Reset Value: -
• CHANNELS: Channels Implemented
This field contains the number of channels implemented on the device.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
CHANNELS
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25.7.11 Version Register
Name: VERSION
Access Type: Read-only
Offset: 0x28
Reset Value: -
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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25.7.12 Top Value Register
Name: TVR
Access Type: Read/Write
Offset: 0x2C
Reset Value: 0x00000000
• TOP: Timebase Counter Top Value
The top value for the timebase counter. The value written to the CR.TOP field will automatically be written to the 8 least
significant bits of this field while the 4 most significant bits will be 0. When this register is written, it will also automatically update
the CR.TOP field with the 8 least significant bits.
The effective top value of the timebase counter is defined by both TVR.TOP and the CR.SPREAD. Refer to Section25.6.2 for
more information.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - TOP[11:8]
76543210
TOP[7:0]
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25.7.13 Interlinked Single Value Channel Set
Name: ISCHSETm
Access Type: Write-only
Offset: 0x30+m*0x10
Reset Value: 0x00000000
• SET: Single Value Channel Set
If the bit n in SET is one, the duty cycle of PWMA channel n will be updated with the value written to ISDUTY.
If more than one ISCHSET register is present, ISCHSET0 controls channels 31 to 0 and ISCHSET1 controls channels 63 to 32.
Note: The duty registers will be updated with the value stored in the ISDUTY register when any ISCHSETm register is written. Synchronization
takes place immediately when an ISCHSET register is written. The duty cycle registers will, however, not be
updated until the synchronization is completed and the timebase counter reaches its top value in order to avoid glitches.
31 30 29 28 27 26 25 24
SET
23 22 21 20 19 18 17 16
SET
15 14 13 12 11 10 9 8
SET
76543210
SET
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25.7.14 Channel Event Response Register
Name: CHERRm
Access Type: Read/Write
Offset: 0x34+m*0x10
Reset Value: 0x00000000
• CHER: Channel Event Response
0: The increase event will increase the duty cycle value by one in a PWM period for the corresponding channel and the
decrease event will decrease the duty cycle value by one.
1: The increase event will decrease the duty cycle value by one in a PWM period for the corresponding channel and the
decrease event will increase the duty cycle value by one.
The events are taken into account when the common timebase counter reaches its top.
If more than one CHERR register is present, CHERR0 controls channels 31-0 and CHERR1 controls channels 64-32 and so on.
31 30 29 28 27 26 25 24
CHER
23 22 21 20 19 18 17 16
CHER
15 14 13 12 11 10 9 8
CHER
76543210
CHER
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25.7.15 Channel Event Enable Register
Name: CHEERm
Access Type: Read/Write
Offset: 0x38+m*0x10
Reset Value: 0x00000000
• CHEE: Channel Event Enable
0: The input peripheral event for the corresponding channel is disabled.
1: The input peripheral event for the corresponding channel is enabled.
Both increase and decrease events for channel n are enabled if bit n is one.
If more than one CHEER register is present, CHEER0 controls channels 31-0 and CHEER1 controls channels 64-32 and so on.
31 30 29 28 27 26 25 24
CHEE
23 22 21 20 19 18 17 16
CHEE
15 14 13 12 11 10 9 8
CHEE
76543210
CHEE
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25.7.16 Composite Waveform Generation
Name: CWG
Access Type: Read/Write
Offset: 0x3C+k*0x10
Reset Value: 0x00000000
• XOR: Pair Waveform XOR’ed
If the bit n in XOR field is one, the pair of PWMA output waveforms will be XORed before output. The even number output will be
the XOR’ed output and the odd number output will be reverse of it. For example, if bit 0 in XOR is one, the pair of PWMA output
waveforms for channel 0 and 1 will be XORed together.
If bit n in XOR is zero, normal waveforms are output for that pair. Note that
If more than one CWG register is present, CWG0 controls the first 32 pairs, corresponding to channels 63 downto 0, and CWG1
controls the second 32 pairs, corresponding to channels 127 downto 64.
31 30 29 28 27 26 25 24
XOR
23 22 21 20 19 18 17 16
XOR
15 14 13 12 11 10 9 8
XOR
76543210
XOR
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25.7.17 Interlinked Multiple Value Duty0/1/2/3 Register
Name: DUTY0/1/2/3
Access Type: Write-only
Offset: 0x80-0x8C
Reset Value: 0x00000000
These registers allows up to 4 channels to be updated with a common 12-bits duty cycle value at a time. They are the
extension of the IMDUTY register which only supports updating the least significant 8 bits of the duty registers for up to 4
channels.
• DUTY: Duty Cycle Value
The duty cycle value written to this field will be updated to the channel specified by IMCHSEL.
DUTY0 is specified by IMCHSEL.SEL0, DUTY1 is specified by IMCHSEL.SEL1, and so on.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - DUTY[11:8]
76543210
DUTY[7:0]
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25.8 Module Configuration
The specific configuration for each PWMA instance is listed in the following tables. The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 25-4. PWMA Configuration
Feature PWMA
Number of PWM channels 36
Channels supporting incoming peripheral events 0, 6, 8, 9, 11, 14, 19, and 20
PWMA channels with Open Drain mode 21, 27, and 28
Table 25-5. PWMA Clocks
Clock Name Descripton
CLK_PWMA Clock for the PWMA bus interface
GCLK The generic clock used for the PWMA is GCLK3
Table 25-6. Register Reset Values
Register Reset Value
VERSION 0x00000201
PARAMETER 0x00000024
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26. Timer/Counter (TC)
Rev: 2.2.3.1.3
26.1 Features
• Three 16-bit Timer Counter channels
• A wide range of functions including:
– Frequency measurement
– Event counting
– Interval measurement
– Pulse generation
– Delay timing
– Pulse width modulation
– Up/down capabilities
• Each channel is user-configurable and contains:
– Three external clock inputs
– Five internal clock inputs
– Two multi-purpose input/output signals
• Internal interrupt signal
• Two global registers that act on all three TC channels
• Peripheral event input on all A lines in capture mode
26.2 Overview
The Timer Counter (TC) includes three identical 16-bit Timer Counter channels.
Each channel can be independently programmed to perform a wide range of functions including
frequency measurement, event counting, interval measurement, pulse generation, delay timing,
and pulse width modulation.
Each channel has three external clock inputs, five internal clock inputs, and two multi-purpose
input/output signals which can be configured by the user. Each channel drives an internal interrupt
signal which can be programmed to generate processor interrupts.
The TC block has two global registers which act upon all three TC channels.
The Block Control Register (BCR) allows the three channels to be started simultaneously with
the same instruction.
The Block Mode Register (BMR) defines the external clock inputs for each channel, allowing
them to be chained.
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26.3 Block Diagram
Figure 26-1. TC Block Diagram
26.4 I/O Lines Description
26.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
26.5.1 I/O Lines
The pins used for interfacing the compliant external devices may be multiplexed with I/O lines.
The user must first program the I/O Controller to assign the TC pins to their peripheral functions.
I/O
Controller
TC2XC2S
INT0
INT1
INT2
TIOA0
TIOA1
TIOA2
TIOB0
TIOB1
TIOB2
XC2
TCLK0
TCLK1
TCLK2
TCLK0
TCLK1
TCLK2
TCLK0
TCLK1
TCLK2
TIOA1
TIOA2
TIOA0
TIOA2
TIOA1
Interrupt
Controller
CLK0
CLK1
CLK2
A0
B0
A1
B1
A2
B2
Timer Count er
TIOB
TIOA
TIOB
SYNC
TIMER_CLOCK1
TIOA
SYNC
SYNC
TIOA
TIOB
TIMER_CLOCK2
TIMER_CLOCK3
TIMER_CLOCK4
TIMER_CLOCK5
XC1
XC0
XC0
XC2
XC1
XC0
XC1
XC2
Timer/Counter
Channel 2
Timer/Counter
Channel 1
Timer/Counter
Channel 0
TC1XC1S
TC0XC0S
TIOA0
Table 26-1. I/O Lines Description
Pin Name Description Type
CLK0-CLK2 External Clock Input Input
A0-A2 I/O Line A Input/Output
B0-B2 I/O Line B Input/Output
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When using the TIOA lines as inputs the user must make sure that no peripheral events are generated
on the line. Refer to the Peripheral Event System chapter for details.
26.5.2 Power Management
If the CPU enters a sleep mode that disables clocks used by the TC, the TC will stop functioning
and resume operation after the system wakes up from sleep mode.
26.5.3 Clocks
The clock for the TC bus interface (CLK_TC) is generated by the Power Manager. This clock is
enabled at reset, and can be disabled in the Power Manager. It is recommended to disable the
TC before disabling the clock, to avoid freezing the TC in an undefined state.
26.5.4 Interrupts
The TC interrupt request line is connected to the interrupt controller. Using the TC interrupt
requires the interrupt controller to be programmed first.
26.5.5 Peripheral Events
The TC peripheral events are connected via the Peripheral Event System. Refer to the Peripheral
Event System chapter for details.
26.5.6 Debug Operation
The Timer Counter clocks are frozen during debug operation, unless the OCD system keeps
peripherals running in debug operation.
26.6 Functional Description
26.6.1 TC Description
The three channels of the Timer Counter are independent and identical in operation. The registers
for channel programming are listed in Figure 26-3 on page 659.
26.6.1.1 Channel I/O Signals
As described in Figure 26-1 on page 643, each Channel has the following I/O signals.
26.6.1.2 16-bit counter
Each channel is organized around a 16-bit counter. The value of the counter is incremented at
each positive edge of the selected clock. When the counter has reached the value 0xFFFF and
passes to 0x0000, an overflow occurs and the Counter Overflow Status bit in the Channel n Status
Register (SRn.COVFS) is set.
Table 26-2. Channel I/O Signals Description
Block/Channel Signal Name Description
Channel Signal
XC0, XC1, XC2 External Clock Inputs
TIOA Capture mode: Timer Counter Input
Waveform mode: Timer Counter Output
TIOB Capture mode: Timer Counter Input
Waveform mode: Timer Counter Input/Output
INT Interrupt Signal Output
SYNC Synchronization Input Signal
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The current value of the counter is accessible in real time by reading the Channel n Counter
Value Register (CVn). The counter can be reset by a trigger. In this case, the counter value
passes to 0x0000 on the next valid edge of the selected clock.
26.6.1.3 Clock selection
At block level, input clock signals of each channel can either be connected to the external inputs
TCLK0, TCLK1 or TCLK2, or be connected to the configurable I/O signals A0, A1 or A2 for
chaining by writing to the BMR register. See Figure 26-2 on page 645.
Each channel can independently select an internal or external clock source for its counter:
• Internal clock signals: TIMER_CLOCK1, TIMER_CLOCK2, TIMER_CLOCK3,
TIMER_CLOCK4, TIMER_CLOCK5. See the Module Configuration Chapter for details about
the connection of these clock sources.
• External clock signals: XC0, XC1 or XC2. See the Module Configuration Chapter for details
about the connection of these clock sources.
This selection is made by the Clock Selection field in the Channel n Mode Register
(CMRn.TCCLKS).
The selected clock can be inverted with the Clock Invert bit in CMRn (CMRn.CLKI). This allows
counting on the opposite edges of the clock.
The burst function allows the clock to be validated when an external signal is high. The Burst
Signal Selection field in the CMRn register (CMRn.BURST) defines this signal.
Note: In all cases, if an external clock is used, the duration of each of its levels must be longer than the
CLK_TC period. The external clock frequency must be at least 2.5 times lower than the CLK_TC.
Figure 26-2. Clock Selection
TIMER_CLOCK5
XC2
TCCLKS
CLKI
BURST
1
Selected
Clock
XC1
XC0
TIMER_CLOCK4
TIMER_CLOCK3
TIMER_CLOCK2
TIMER_CLOCK1
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26.6.1.4 Clock control
The clock of each counter can be controlled in two different ways: it can be enabled/disabled
and started/stopped. See Figure 26-3 on page 646.
• The clock can be enabled or disabled by the user by writing to the Counter Clock
Enable/Disable Command bits in the Channel n Clock Control Register (CCRn.CLKEN and
CCRn.CLKDIS). In Capture mode it can be disabled by an RB load event if the Counter Clock
Disable with RB Loading bit in CMRn is written to one (CMRn.LDBDIS). In Waveform mode,
it can be disabled by an RC Compare event if the Counter Clock Disable with RC Compare
bit in CMRn is written to one (CMRn.CPCDIS). When disabled, the start or the stop actions
have no effect: only a CLKEN command in CCRn can re-enable the clock. When the clock is
enabled, the Clock Enabling Status bit is set in SRn (SRn.CLKSTA).
• The clock can also be started or stopped: a trigger (software, synchro, external or compare)
always starts the clock. In Capture mode the clock can be stopped by an RB load event if the
Counter Clock Stopped with RB Loading bit in CMRn is written to one (CMRn.LDBSTOP). In
Waveform mode it can be stopped by an RC compare event if the Counter Clock Stopped
with RC Compare bit in CMRn is written to one (CMRn.CPCSTOP). The start and the stop
commands have effect only if the clock is enabled.
Figure 26-3. Clock Control
26.6.1.5 TC operating modes
Each channel can independently operate in two different modes:
• Capture mode provides measurement on signals.
• Waveform mode provides wave generation.
The TC operating mode selection is done by writing to the Wave bit in the CCRn register
(CCRn.WAVE).
In Capture mode, TIOA and TIOB are configured as inputs.
Q S
R
S
R
Q
CLKSTA CLKEN CLKDIS
Stop
Event
Disable
Counter
Clock
Selected
Clock Trigger
Event
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In Waveform mode, TIOA is always configured to be an output and TIOB is an output if it is not
selected to be the external trigger.
26.6.1.6 Trigger
A trigger resets the counter and starts the counter clock. Three types of triggers are common to
both modes, and a fourth external trigger is available to each mode.
The following triggers are common to both modes:
• Software Trigger: each channel has a software trigger, available by writing a one to the
Software Trigger Command bit in CCRn (CCRn.SWTRG).
• SYNC: each channel has a synchronization signal SYNC. When asserted, this signal has the
same effect as a software trigger. The SYNC signals of all channels are asserted
simultaneously by writing a one to the Synchro Command bit in the BCR register
(BCR.SYNC).
• Compare RC Trigger: RC is implemented in each channel and can provide a trigger when the
counter value matches the RC value if the RC Compare Trigger Enable bit in CMRn
(CMRn.CPCTRG) is written to one.
The channel can also be configured to have an external trigger. In Capture mode, the external
trigger signal can be selected between TIOA and TIOB. In Waveform mode, an external event
can be programmed to be one of the following signals: TIOB, XC0, XC1, or XC2. This external
event can then be programmed to perform a trigger by writing a one to the External Event Trigger
Enable bit in CMRn (CMRn.ENETRG).
If an external trigger is used, the duration of the pulses must be longer than the CLK_TC period
in order to be detected.
Regardless of the trigger used, it will be taken into account at the following active edge of the
selected clock. This means that the counter value can be read differently from zero just after a
trigger, especially when a low frequency signal is selected as the clock.
26.6.1.7 Peripheral events on TIOA inputs
The TIOA input lines are ored internally with peripheral events from the Peripheral Event System.
To capture using events the user must ensure that the corresponding pin functions for the
TIOA line are disabled. When capturing on the external TIOA pin the user must ensure that no
peripheral events are generated on this pin.
26.6.2 Capture Operating Mode
This mode is entered by writing a zero to the CMRn.WAVE bit.
Capture mode allows the TC channel to perform measurements such as pulse timing, frequency,
period, duty cycle and phase on TIOA and TIOB signals which are considered as
inputs.
Figure 26-4 on page 649 shows the configuration of the TC channel when programmed in Capture
mode.
26.6.2.1 Capture registers A and B
Registers A and B (RA and RB) are used as capture registers. This means that they can be
loaded with the counter value when a programmable event occurs on the signal TIOA.
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The RA Loading Selection field in CMRn (CMRn.LDRA) defines the TIOA edge for the loading of
the RA register, and the RB Loading Selection field in CMRn (CMRn.LDRB) defines the TIOA
edge for the loading of the RB register.
RA is loaded only if it has not been loaded since the last trigger or if RB has been loaded since
the last loading of RA.
RB is loaded only if RA has been loaded since the last trigger or the last loading of RB.
Loading RA or RB before the read of the last value loaded sets the Load Overrun Status bit in
SRn (SRn.LOVRS). In this case, the old value is overwritten.
26.6.2.2 Trigger conditions
In addition to the SYNC signal, the software trigger and the RC compare trigger, an external trigger
can be defined.
The TIOA or TIOB External Trigger Selection bit in CMRn (CMRn.ABETRG) selects TIOA or
TIOB input signal as an external trigger. The External Trigger Edge Selection bit in CMRn
(CMRn.ETREDG) defines the edge (rising, falling or both) detected to generate an external trigger.
If CMRn.ETRGEDG is zero (none), the external trigger is disabled.
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Figure 26-4. Capture Mode TIMER_CLOCK1 XC0
XC1
XC2
TCCLKS
CLKI
Q S
R
S
R
Q
CLKSTA CLKEN CLKDIS
BURST
TIOB
Capture
Register A Compare RC =
16-bit
Counter
ABETRG
SWTRG
ETRGEDG CPCTRG
IMR
Trig
LDRBS
LDRAS
ETRGS
SR
LOVRS
COVFS
SYNC
1
MTIOB
TIOA
MTIOA
LDRA
LDBSTOP
If RA is not Loaded
or RB is Loaded If RA is Loaded
LDBDIS
CPCS
INT
Edge
Detector
LDRB
CLK OVF
RESET
Timer/Counter Channel
Edge
Detector
Edge
Detector
Capture
Register B
Register C
TIMER_CLOCK2
TIMER_CLOCK3
TIMER_CLOCK4
TIMER_CLOCK5
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26.6.3 Waveform Operating Mode
Waveform operating mode is entered by writing a one to the CMRn.WAVE bit.
In Waveform operating mode the TC channel generates one or two PWM signals with the same
frequency and independently programmable duty cycles, or generates different types of oneshot
or repetitive pulses.
In this mode, TIOA is configured as an output and TIOB is defined as an output if it is not used
as an external event.
Figure 26-5 on page 651 shows the configuration of the TC channel when programmed in
Waveform operating mode.
26.6.3.1 Waveform selection
Depending on the Waveform Selection field in CMRn (CMRn.WAVSEL), the behavior of CVn
varies.
With any selection, RA, RB and RC can all be used as compare registers.
RA Compare is used to control the TIOA output, RB Compare is used to control the TIOB output
(if correctly configured) and RC Compare is used to control TIOA and/or TIOB outputs.
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Figure 26-5. Waveform Mode TCCLKS CLKI Q S
R
S
R
Q
CLKSTA CLKEN CLKDIS
CPCDIS
BURST
TIOB
Register A
Compare RC =
CPCSTOP
16-bit
Counter
EEVT
EEVTEDG
SYNC
SWTRG
ENETRG
WAVSEL
IMR
Trig
ACPC
ACPA
AEEVT
ASWTRG
BCPC
BCPB
BEEVT
BSWTRG
TIOA
MTIOA
TIOB
MTIOB
CPAS
COVFS
ETRGS
SR
CPCS
CPBS
CLK
OVF
RESET
Output Contr oller O utput Cont r oller
INT
1
Edge
Detector
Timer/Counter Channel
TIMER_CLOCK1
XC0
XC1
XC2
WAVSEL
Register B Register C
Compare RB = Compare RA =
TIMER_CLOCK2
TIMER_CLOCK3
TIMER_CLOCK4
TIMER_CLOCK5
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26.6.3.2 WAVSEL = 0
When CMRn.WAVSEL is zero, the value of CVn is incremented from 0 to 0xFFFF. Once
0xFFFF has been reached, the value of CVn is reset. Incrementation of CVn starts again and
the cycle continues. See Figure 26-6 on page 652.
An external event trigger or a software trigger can reset the value of CVn. It is important to note
that the trigger may occur at any time. See Figure 26-7 on page 653.
RC Compare cannot be programmed to generate a trigger in this configuration. At the same
time, RC Compare can stop the counter clock (CMRn.CPCSTOP = 1) and/or disable the counter
clock (CMRn.CPCDIS = 1).
Figure 26-6. WAVSEL= 0 Without Trigger
Time
Counter Value
RC
RB
RA
TIOB
TIOA
Counter cleared by compare match with
0xFFFF
0xFFFF
Waveform Examples
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Figure 26-7. WAVSEL= 0 With Trigger
26.6.3.3 WAVSEL = 2
When CMRn.WAVSEL is two, the value of CVn is incremented from zero to the value of RC,
then automatically reset on a RC Compare. Once the value of CVn has been reset, it is then
incremented and so on. See Figure 26-8 on page 654.
It is important to note that CVn can be reset at any time by an external event or a software trigger
if both are programmed correctly. See Figure 26-9 on page 654.
In addition, RC Compare can stop the counter clock (CMRn.CPCSTOP) and/or disable the
counter clock (CMRn.CPCDIS = 1).
Time
Counter Value
RC
RB
RA
TIOB
TIOA
Counter cleared by compare match with 0xFFFF
0xFFFF
Waveform Examples
Counter cleared by trigger
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Figure 26-8. WAVSEL = 2 Without Trigger
Figure 26-9. WAVSEL = 2 With Trigger
26.6.3.4 WAVSEL = 1
When CMRn.WAVSEL is one, the value of CVn is incremented from 0 to 0xFFFF. Once 0xFFFF
is reached, the value of CVn is decremented to 0, then re-incremented to 0xFFFF and so on.
See Figure 26-10 on page 655.
Time
Counter Value
RC
RB
RA
TIOB
TIOA
Counter cleared by compare match
with RC
0xFFFF
Waveform Examples
Time
Counter Value
RC
RB
RA
TIOB
TIOA
Counter cleared by compare match with RC
0xFFFF
Waveform Examples
Counter cleared by trigger
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A trigger such as an external event or a software trigger can modify CVn at any time. If a trigger
occurs while CVn is incrementing, CVn then decrements. If a trigger is received while CVn is
decrementing, CVn then increments. See Figure 26-11 on page 655.
RC Compare cannot be programmed to generate a trigger in this configuration.
At the same time, RC Compare can stop the counter clock (CMRn.CPCSTOP = 1) and/or disable
the counter clock (CMRn.CPCDIS = 1).
Figure 26-10. WAVSEL = 1 Without Trigger
Figure 26-11. WAVSEL = 1 With Trigger
Time
Counter Value
RC
RB
RA
TIOB
TIOA
Counter decremented by compare match
with 0xFFFF
0xFFFF
Waveform Examples
Time
Counter Value
TIOB
TIOA
Counter decremented by compare match with 0xFFFF
0xFFFF
Waveform Examples
Counter decremented by trigger
RC
RB
RA
Counter incremented by trigger
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26.6.3.5 WAVSEL = 3
When CMRn.WAVSEL is three, the value of CVn is incremented from zero to RC. Once RC is
reached, the value of CVn is decremented to zero, then re-incremented to RC and so on. See
Figure 26-12 on page 656.
A trigger such as an external event or a software trigger can modify CVn at any time. If a trigger
occurs while CVn is incrementing, CVn then decrements. If a trigger is received while CVn is
decrementing, CVn then increments. See Figure 26-13 on page 657.
RC Compare can stop the counter clock (CMRn.CPCSTOP = 1) and/or disable the counter clock
(CMRn.CPCDIS = 1).
Figure 26-12. WAVSEL = 3 Without Trigger
Time
Counter Value
RC
RB
RA
TIOB
TIOA
Counter cleared by compare match with RC
0xFFFF
Waveform Examples
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Figure 26-13. WAVSEL = 3 With Trigger
26.6.3.6 External event/trigger conditions
An external event can be programmed to be detected on one of the clock sources (XC0, XC1,
XC2) or TIOB. The external event selected can then be used as a trigger.
The External Event Selection field in CMRn (CMRn.EEVT) selects the external trigger. The
External Event Edge Selection field in CMRn (CMRn.EEVTEDG) defines the trigger edge for
each of the possible external triggers (rising, falling or both). If CMRn.EEVTEDG is written to
zero, no external event is defined.
If TIOB is defined as an external event signal (CMRn.EEVT = 0), TIOB is no longer used as an
output and the compare register B is not used to generate waveforms and subsequently no
IRQs. In this case the TC channel can only generate a waveform on TIOA.
When an external event is defined, it can be used as a trigger by writing a one to the
CMRn.ENETRG bit.
As in Capture mode, the SYNC signal and the software trigger are also available as triggers. RC
Compare can also be used as a trigger depending on the CMRn.WAVSEL field.
26.6.3.7 Output controller
The output controller defines the output level changes on TIOA and TIOB following an event.
TIOB control is used only if TIOB is defined as output (not as an external event).
The following events control TIOA and TIOB:
• software trigger
• external event
• RC compare
RA compare controls TIOA and RB compare controls TIOB. Each of these events can be programmed
to set, clear or toggle the output as defined in the following fields in CMRn:
• RC Compare Effect on TIOB (CMRn.BCPC)
Time
Counter Value
TIOB
TIOA
Counter decremented by compare match
with RC
0xFFFF
Waveform Examples
RC
RB
RA
Counter decremented by trigger
Counter incremented by trigger
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• RB Compare Effect on TIOB (CMRn.BCPB)
• RC Compare Effect on TIOA (CMRn.ACPC)
• RA Compare Effect on TIOA (CMRn.ACPA)
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26.7 User Interface
Table 26-3. TC Register Memory Map
Offset Register Register Name Access Reset
0x00 Channel 0 Control Register CCR0 Write-only 0x00000000
0x04 Channel 0 Mode Register CMR0 Read/Write 0x00000000
0x10 Channel 0 Counter Value CV0 Read-only 0x00000000
0x14 Channel 0 Register A RA0 Read/Write(1) 0x00000000
0x18 Channel 0 Register B RB0 Read/Write(1) 0x00000000
0x1C Channel 0 Register C RC0 Read/Write 0x00000000
0x20 Channel 0 Status Register SR0 Read-only 0x00000000
0x24 Interrupt Enable Register IER0 Write-only 0x00000000
0x28 Channel 0 Interrupt Disable Register IDR0 Write-only 0x00000000
0x2C Channel 0 Interrupt Mask Register IMR0 Read-only 0x00000000
0x40 Channel 1 Control Register CCR1 Write-only 0x00000000
0x44 Channel 1 Mode Register CMR1 Read/Write 0x00000000
0x50 Channel 1 Counter Value CV1 Read-only 0x00000000
0x54 Channel 1 Register A RA1 Read/Write(1) 0x00000000
0x58 Channel 1 Register B RB1 Read/Write(1) 0x00000000
0x5C Channel 1 Register C RC1 Read/Write 0x00000000
0x60 Channel 1 Status Register SR1 Read-only 0x00000000
0x64 Channel 1 Interrupt Enable Register IER1 Write-only 0x00000000
0x68 Channel 1 Interrupt Disable Register IDR1 Write-only 0x00000000
0x6C Channel 1 Interrupt Mask Register IMR1 Read-only 0x00000000
0x80 Channel 2 Control Register CCR2 Write-only 0x00000000
0x84 Channel 2 Mode Register CMR2 Read/Write 0x00000000
0x90 Channel 2 Counter Value CV2 Read-only 0x00000000
0x94 Channel 2 Register A RA2 Read/Write(1) 0x00000000
0x98 Channel 2 Register B RB2 Read/Write(1) 0x00000000
0x9C Channel 2 Register C RC2 Read/Write 0x00000000
0xA0 Channel 2 Status Register SR2 Read-only 0x00000000
0xA4 Channel 2 Interrupt Enable Register IER2 Write-only 0x00000000
0xA8 Channel 2 Interrupt Disable Register IDR2 Write-only 0x00000000
0xAC Channel 2 Interrupt Mask Register IMR2 Read-only 0x00000000
0xC0 Block Control Register BCR Write-only 0x00000000
0xC4 Block Mode Register BMR Read/Write 0x00000000
0xF8 Features Register FEATURES Read-only -(2)
0xFC Version Register VERSION Read-only -(2)
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Notes: 1. Read-only if CMRn.WAVE is zero.
2. The reset values are device specific. Please refer to the Module Configuration section at the
end of this chapter.
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26.7.1 Channel Control Register
Name: CCR
Access Type: Write-only
Offset: 0x00 + n * 0x40
Reset Value: 0x00000000
• SWTRG: Software Trigger Command
1: Writing a one to this bit will perform a software trigger: the counter is reset and the clock is started.
0: Writing a zero to this bit has no effect.
• CLKDIS: Counter Clock Disable Command
1: Writing a one to this bit will disable the clock.
0: Writing a zero to this bit has no effect.
• CLKEN: Counter Clock Enable Command
1: Writing a one to this bit will enable the clock if CLKDIS is not one.
0: Writing a zero to this bit has no effect.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - SWTRG CLKDIS CLKEN
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26.7.2 Channel Mode Register: Capture Mode
Name: CMR
Access Type: Read/Write
Offset: 0x04 + n * 0x40
Reset Value: 0x00000000
• LDRB: RB Loading Selection
• LDRA: RA Loading Selection
• WAVE
1: Capture mode is disabled (Waveform mode is enabled).
0: Capture mode is enabled.
• CPCTRG: RC Compare Trigger Enable
1: RC Compare resets the counter and starts the counter clock.
0: RC Compare has no effect on the counter and its clock.
• ABETRG: TIOA or TIOB External Trigger Selection
1: TIOA is used as an external trigger.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - LDRB LDRA
15 14 13 12 11 10 9 8
WAVE CPCTRG - - - ABETRG ETRGEDG
76543210
LDBDIS LDBSTOP BURST CLKI TCCLKS
LDRB Edge
0 none
1 rising edge of TIOA
2 falling edge of TIOA
3 each edge of TIOA
LDRA Edge
0 none
1 rising edge of TIOA
2 falling edge of TIOA
3 each edge of TIOA
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0: TIOB is used as an external trigger.
• ETRGEDG: External Trigger Edge Selection
• LDBDIS: Counter Clock Disable with RB Loading
1: Counter clock is disabled when RB loading occurs.
0: Counter clock is not disabled when RB loading occurs.
• LDBSTOP: Counter Clock Stopped with RB Loading
1: Counter clock is stopped when RB loading occurs.
0: Counter clock is not stopped when RB loading occurs.
• BURST: Burst Signal Selection
• CLKI: Clock Invert
1: The counter is incremented on falling edge of the clock.
0: The counter is incremented on rising edge of the clock.
• TCCLKS: Clock Selection
ETRGEDG Edge
0 none
1 rising edge
2 falling edge
3 each edge
BURST Burst Signal Selection
0 The clock is not gated by an external signal
1 XC0 is ANDed with the selected clock
2 XC1 is ANDed with the selected clock
3 XC2 is ANDed with the selected clock
TCCLKS Clock Selected
0 TIMER_CLOCK1
1 TIMER_CLOCK2
2 TIMER_CLOCK3
3 TIMER_CLOCK4
4 TIMER_CLOCK5
5 XC0
6 XC1
7 XC2
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26.7.3 Channel Mode Register: Waveform Mode
Name: CMR
Access Type: Read/Write
Offset: 0x04 + n * 0x40
Reset Value: 0x00000000
• BSWTRG: Software Trigger Effect on TIOB
• BEEVT: External Event Effect on TIOB
31 30 29 28 27 26 25 24
BSWTRG BEEVT BCPC BCPB
23 22 21 20 19 18 17 16
ASWTRG AEEVT ACPC ACPA
15 14 13 12 11 10 9 8
WAVE WAVSEL ENETRG EEVT EEVTEDG
76543210
CPCDIS CPCSTOP BURST CLKI TCCLKS
BSWTRG Effect
0 none
1 set
2 clear
3 toggle
BEEVT Effect
0 none
1 set
2 clear
3 toggle
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• BCPC: RC Compare Effect on TIOB
• BCPB: RB Compare Effect on TIOB
• ASWTRG: Software Trigger Effect on TIOA
• AEEVT: External Event Effect on TIOA
• ACPC: RC Compare Effect on TIOA
BCPC Effect
0 none
1 set
2 clear
3 toggle
BCPB Effect
0 none
1 set
2 clear
3 toggle
ASWTRG Effect
0 none
1 set
2 clear
3 toggle
AEEVT Effect
0 none
1 set
2 clear
3 toggle
ACPC Effect
0 none
1 set
2 clear
3 toggle
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• ACPA: RA Compare Effect on TIOA
• WAVE
1: Waveform mode is enabled.
0: Waveform mode is disabled (Capture mode is enabled).
• WAVSEL: Waveform Selection
• ENETRG: External Event Trigger Enable
1: The external event resets the counter and starts the counter clock.
0: The external event has no effect on the counter and its clock. In this case, the selected external event only controls the TIOA
output.
• EEVT: External Event Selection
Note: 1. If TIOB is chosen as the external event signal, it is configured as an input and no longer generates waveforms and subsequently
no IRQs.
• EEVTEDG: External Event Edge Selection
• CPCDIS: Counter Clock Disable with RC Compare
1: Counter clock is disabled when counter reaches RC.
0: Counter clock is not disabled when counter reaches RC.
ACPA Effect
0 none
1 set
2 clear
3 toggle
WAVSEL Effect
0 UP mode without automatic trigger on RC Compare
1 UPDOWN mode without automatic trigger on RC Compare
2 UP mode with automatic trigger on RC Compare
3 UPDOWN mode with automatic trigger on RC Compare
EEVT Signal selected as external event TIOB Direction
0 TIOB input(1)
1 XC0 output
2 XC1 output
3 XC2 output
EEVTEDG Edge
0 none
1 rising edge
2 falling edge
3 each edge
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• CPCSTOP: Counter Clock Stopped with RC Compare
1: Counter clock is stopped when counter reaches RC.
0: Counter clock is not stopped when counter reaches RC.
• BURST: Burst Signal Selection
• CLKI: Clock Invert
1: Counter is incremented on falling edge of the clock.
0: Counter is incremented on rising edge of the clock.
• TCCLKS: Clock Selection
BURST Burst Signal Selection
0 The clock is not gated by an external signal.
1 XC0 is ANDed with the selected clock.
2 XC1 is ANDed with the selected clock.
3 XC2 is ANDed with the selected clock.
TCCLKS Clock Selected
0 TIMER_CLOCK1
1 TIMER_CLOCK2
2 TIMER_CLOCK3
3 TIMER_CLOCK4
4 TIMER_CLOCK5
5 XC0
6 XC1
7 XC2
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26.7.4 Channel Counter Value Register
Name: CV
Access Type: Read-only
Offset: 0x10 + n * 0x40
Reset Value: 0x00000000
• CV: Counter Value
CV contains the counter value in real time.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
CV[15:8]
76543210
CV[7:0]
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26.7.5 Channel Register A
Name: RA
Access Type: Read-only if CMRn.WAVE = 0, Read/Write if CMRn.WAVE = 1
Offset: 0x14 + n * 0X40
Reset Value: 0x00000000
• RA: Register A
RA contains the Register A value in real time.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
RA[15:8]
76543210
RA[7:0]
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26.7.6 Channel Register B
Name: RB
Access Type: Read-only if CMRn.WAVE = 0, Read/Write if CMRn.WAVE = 1
Offset: 0x18 + n * 0x40
Reset Value: 0x00000000
• RB: Register B
RB contains the Register B value in real time.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
RB[15:8]
76543210
RB[7:0]
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26.7.7 Channel Register C
Name: RC
Access Type: Read/Write
Offset: 0x1C + n * 0x40
Reset Value: 0x00000000
• RC: Register C
RC contains the Register C value in real time.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
RC[15:8]
76543210
RC[7:0]
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26.7.8 Channel Status Register
Name: SR
Access Type: Read-only
Offset: 0x20 + n * 0x40
Reset Value: 0x00000000
Note: Reading the Status Register will also clear the interrupt bit for the corresponding interrupts.
• MTIOB: TIOB Mirror
1: TIOB is high. If CMRn.WAVE is zero, this means that TIOB pin is high. If CMRn.WAVE is one, this means that TIOB is driven
high.
0: TIOB is low. If CMRn.WAVE is zero, this means that TIOB pin is low. If CMRn.WAVE is one, this means that TIOB is driven
low.
• MTIOA: TIOA Mirror
1: TIOA is high. If CMRn.WAVE is zero, this means that TIOA pin is high. If CMRn.WAVE is one, this means that TIOA is driven
high.
0: TIOA is low. If CMRn.WAVE is zero, this means that TIOA pin is low. If CMRn.WAVE is one, this means that TIOA is driven
low.
• CLKSTA: Clock Enabling Status
1: This bit is set when the clock is enabled.
0: This bit is cleared when the clock is disabled.
• ETRGS: External Trigger Status
1: This bit is set when an external trigger has occurred.
0: This bit is cleared when the SR register is read.
• LDRBS: RB Loading Status
1: This bit is set when an RB Load has occurred and CMRn.WAVE is zero.
0: This bit is cleared when the SR register is read.
• LDRAS: RA Loading Status
1: This bit is set when an RA Load has occurred and CMRn.WAVE is zero.
0: This bit is cleared when the SR register is read.
• CPCS: RC Compare Status
1: This bit is set when an RC Compare has occurred.
0: This bit is cleared when the SR register is read.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - - MTIOB MTIOA CLKSTA
15 14 13 12 11 10 9 8
--------
76543210
ETRGS LDRBS LDRAS CPCS CPBS CPAS LOVRS COVFS
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• CPBS: RB Compare Status
1: This bit is set when an RB Compare has occurred and CMRn.WAVE is one.
0: This bit is cleared when the SR register is read.
• CPAS: RA Compare Status
1: This bit is set when an RA Compare has occurred and CMRn.WAVE is one.
0: This bit is cleared when the SR register is read.
• LOVRS: Load Overrun Status
1: This bit is set when RA or RB have been loaded at least twice without any read of the corresponding register and
CMRn.WAVE is zero.
0: This bit is cleared when the SR register is read.
• COVFS: Counter Overflow Status
1: This bit is set when a counter overflow has occurred.
0: This bit is cleared when the SR register is read.
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26.7.9 Channel Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x24 + n * 0x40
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
ETRGS LDRBS LDRAS CPCS CPBS CPAS LOVRS COVFS
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26.7.10 Channel Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x28 + n * 0x40
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
ETRGS LDRBS LDRAS CPCS CPBS CPAS LOVRS COVFS
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26.7.11 Channel Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x2C + n * 0x40
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
ETRGS LDRBS LDRAS CPCS CPBS CPAS LOVRS COVFS
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26.7.12 Block Control Register
Name: BCR
Access Type: Write-only
Offset: 0xC0
Reset Value: 0x00000000
• SYNC: Synchro Command
1: Writing a one to this bit asserts the SYNC signal which generates a software trigger simultaneously for each of the channels.
0: Writing a zero to this bit has no effect.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - - - SYNC
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26.7.13 Block Mode Register
Name: BMR
Access Type: Read/Write
Offset: 0xC4
Reset Value: 0x00000000
• TC2XC2S: External Clock Signal 2 Selection
• TC1XC1S: External Clock Signal 1 Selection
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - TC2XC2S TC1XC1S TC0XC0S
TC2XC2S Signal Connected to XC2
0 TCLK2
1 none
2 TIOA0
3 TIOA1
TC1XC1S Signal Connected to XC1
0 TCLK1
1 none
2 TIOA0
3 TIOA2
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• TC0XC0S: External Clock Signal 0 Selection
TC0XC0S Signal Connected to XC0
0 TCLK0
1 none
2 TIOA1
3 TIOA2
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26.7.14 Features Register
Name: FEATURES
Access Type: Read-only
Offset: 0xF8
Reset Value: -
• BRPBHSB: Bridge type is PB to HSB
1: Bridge type is PB to HSB.
0: Bridge type is not PB to HSB.
• UPDNIMPL: Up/down is implemented
1: Up/down counter capability is implemented.
0: Up/down counter capability is not implemented.
• CTRSIZE: Counter size
This field indicates the size of the counter in bits.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
-------
15 14 13 12 11 10 9 8
- - - - - - BRPBHSB UPDNIMPL
76543210
CTRSIZE
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26.7.15 Version Register
Name: VERSION
Access Type: Read-only
Offset: 0xFC
Reset Value: -
• VARIANT: Variant number
Reserved. No functionality associated.
• VERSION: Version number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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26.8 Module Configuration
The specific configuration for each Timer/Counter instance is listed in the following tables.The
module bus clocks listed here are connected to the system bus clocks. Please refer to the Power
Manager chapter for details.
26.8.1 Clock Connections
There are two Timer/Counter modules, TC0 and TC1, with three channels each, giving a total of
six Timer/Counter channels. Each Timer/Counter channel can independently select an internal
or external clock source for its counter:
Table 26-4. TC Bus Interface Clocks
Module name Clock Name Description
TC0 CLK_TC0 Clock for the TC0 bus interface
TC1 CLK_TC1 Clock for the TC1 bus interface
Table 26-5. Timer/Counter Clock Connections
Module Source Name Connection
TC0 Internal TIMER_CLOCK1 32 KHz oscillator clock (CLK_32K)
TIMER_CLOCK2 PBA Clock / 2
TIMER_CLOCK3 PBA Clock / 8
TIMER_CLOCK4 PBA Clock / 32
TIMER_CLOCK5 PBA Clock / 128
External XC0 See Section on page 10
XC1
XC2
TC1 Internal TIMER_CLOCK1 32 KHz oscillator clock (CLK_32K)
TIMER_CLOCK2 PBA Clock / 2
TIMER_CLOCK3 PBA Clock / 8
TIMER_CLOCK4 PBA Clock / 32
TIMER_CLOCK5 PBA Clock / 128
External XC0 See Section on page 10
XC1
XC2
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27. Peripheral Event System
Rev: 1.0.0.1
27.1 Features
• Direct peripheral to peripheral communication system
• Allows peripherals to receive, react to, and send peripheral events without CPU intervention
• Cycle deterministic event communication
• Asynchronous interrupts allow advanced peripheral operation in low power sleep modes
27.2 Overview
Several peripheral modules can be configured to emit or respond to signals known as peripheral
events. The exact condition to trigger a peripheral event, or the action taken upon receiving a
peripheral event, is specific to each module. Peripherals that respond to peripheral events are
called peripheral event users and peripherals that emit peripheral events are called peripheral
event generators. A single module can be both a peripheral event generator and user.
The peripheral event generators and users are interconnected by a network known as the
Peripheral Event System. This allows low latency peripheral-to-peripheral signaling without CPU
intervention, and without consuming system resources such as bus or RAM bandwidth. This
offloads the CPU and system resources compared to a traditional interrupt-based software
driven system.
27.3 Peripheral Event System Block Diagram
Figure 27-1. Peripheral Event System Block Diagram
27.4 Functional Description
27.4.1 Configuration
The Peripheral Event System in the ATUC64/128/256L3/4U has a fixed mapping of peripheral
events between generators and users, as described in Table 27-1 to Table 27-4. Thus, the user
does not need to configure the interconnection between the modules, although each peripheral
event can be enabled or disabled at the generator or user side as described in the peripheral
chapter for each module.
Peripheral
Event
System
Generator
Generator
User
Generator/
User
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Table 27-1. Peripheral Event Mapping from ACIFB to PWMA
Generator Generated Event User Effect Asynchronous
ACIFB channel 0
AC0 VINP > AC0 VINN PWMA channel 0
PWMA duty cycle value increased by one
No
AC0 VINN > AC0 VINP PWMA duty cycle value decreased by one
ACIFB channel 1
AC1 VINP > AC1 VINN PWMA channel 6
PWMA duty cycle value increased by one
AC1 VINN > AC1 VINP PWMA duty cycle value decreased by one
ACIFB channel 2
AC2 VINP > AC2 VINN PWMA channel 8
PWMA duty cycle value increased by one
AC2 VINN > AC2 VINP PWMA duty cycle value decreased by one
ACIFB channel 3
AC3 VINP > AC3 VINN PWMA channel 9
PWMA duty cycle value increased by one
AC3 VINN > AC3 VINP PWMA duty cycle value decreased by one
ACIFB channel 4
AC4 VINP > AC4 VINN PWMA channel 11
PWMA duty cycle value increased by one
AC4 VINN > AC4 VINP PWMA duty cycle value decreased by one
ACIFB channel 5
AC5 VINP > AC5 VINN PWMA channel 14
PWMA duty cycle value increased by one
AC5 VINN > AC5 VINP PWMA duty cycle value decreased by one
ACIFB channel 6
AC6 VINP > AC6 VINN PWMA channel 19
PWMA duty cycle value increased by one
AC6 VINN > AC6 VINP PWMA duty cycle value decreased by one
ACIFB channel 7
AC7 VINP > AC7 VINN PWMA channel 20
PWMA duty cycle value increased by one
AC7 VINN > AC7 VINP PWMA duty cycle value decreased by one
ACIFB channel n ACn VINN > ACn VINP CAT Automatically used by the CAT when
performing QMatrix acquisition. No
Table 27-2. Peripheral Event Mapping from GPIO to TC
Generator Generated Event User Effect Asynchronous
GPIO
Pin change on PA00-PA07
TC0
A0 capture
No
Pin change on PA08-PA15 A1 capture
Pin change on PA16-PA23 A2 capture
Pin change on PB00-PB07 TC1
A1 capture
Pin change on PB08-PB15 A2 capture
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27.4.2 Peripheral Event Connections
Each generated peripheral event is connected to one or more users. If a peripheral event is connected
to multiple users, the peripheral event can trigger actions in multiple modules.
A peripheral event user can likewise be connected to one or more peripheral event generators. If
a peripheral event user is connected to multiple generators, the peripheral events are OR’ed
together to a single peripheral event. This means that peripheral events from either one of the
generators will result in a peripheral event to the user.
To configure a peripheral event, the peripheral event must be enabled at both the generator and
user side. Even if a generator is connected to multiple users, only the users with the peripheral
event enabled will trigger on the peripheral event.
27.4.3 Low Power Operation
As the peripheral events do not require CPU intervention, they are available in Idle mode. They
are also available in deeper sleep modes if both the generator and user remain clocked in that
mode.
Certain events are known as asynchronous peripheral events, as identified in Table 27-1 to
Table 27-4. These can be issued even when the system clock is stopped, and revive unclocked
user peripherals. The clock will be restarted for this module only, without waking the system from
sleep mode. The clock remains active only as long as required by the triggered function, before
being switched off again, and the system remains in the original sleep mode. The CPU and sysTable
27-3. Peripheral Event Mapping from AST
Generator Generated Event User Effect Asynchronous
AST
Overflow event
ACIFB
Comparison is triggered if the ACIFB.CONFn
register is written to 11 (Event Triggered Single
Measurement Mode) and the EVENTEN bit in
the ACIFB.CTRL register is written to 1.
Yes
Periodic event
Alarm event
Overflow event
ADCIFB
Conversion is triggered if the TRGMOD bit in
the ADCIFB.TRGR register is written to 111
(Peripheral Event Trigger).
Periodic event
Alarm event
Overflow event
CAT Trigger one iteration of autonomous touch
detection. Periodic event
Alarm event
Table 27-4. Peripheral Event Mapping from PWMA
Generator Generated Event User Effect Asynchronous
PWMA channel 0
Timebase counter
reaches the duty cycle
value.
ACIFB
Comparison is triggered if the ACIFB.CONFn
register is written to 11 (Event Triggered Single
Measurement Mode) and the EVENTEN bit in
the ACIFB.CTRL register is written to 1. No
ADCIFB
Conversion is triggered if the TRGMOD bit in
the ADCIFB.TRGR register is written to 111
(Peripheral Event Trigger).
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tem will only be woken up if the user peripheral generates an interrupt as a result of the
operation. This concept is known as SleepWalking and is described in further detail in the Power
Manager chapter. Note that asynchronous peripheral events may be associated with a delay
due to the need to restart the system clock source if this has been stopped in the sleep mode.
27.5 Application Example
This application example shows how the Peripheral Event System can be used to program the
ADC Interface to perform ADC conversions at selected intervals.
Conversions of the active analog channels are started with a software or a hardware trigger.
One of the possible hardware triggers is a peripheral event trigger, allowing the Peripheral Event
System to synchronize conversion with some configured peripheral event source. From Table
27-3 and Table 27-4, it can be read that this peripheral event source can be either an AST
peripheral event, or an event from the PWM Controller. The AST can generate periodic peripheral
events at selected intervals, among other types of peripheral events. The Peripheral Event
System can then be used to set up the ADC Interface to sample an analog signal at regular
intervals.
The user must enable peripheral events in the AST and in the ADC Interface to accomplish this.
The periodic peripheral event in the AST is enabled by writing a one to the corresponding bit in
the AST Event Enable Register (EVE). To select the peripheral event trigger for the ADC Interface,
the user must write the value 0x7 to the Trigger Mode (TRGMOD) field in the ADC
Interface Trigger Register (TRGR). When the peripheral events are enabled, the AST will generate
peripheral events at the selected intervals, and the Peripheral Event System will route the
peripheral events to the ADC Interface, which will perform ADC conversions at the selected
intervals.
Figure 27-2. Application Example
Since the AST peripheral event is asynchronous, the description above will also work in sleep
modes where the ADC clock is stopped. In this case, the ADC clock (and clock source, if
needed) will be restarted during the ADC conversion. After the conversion, the ADC clock and
clock source will return to the sleep state, unless the ADC generates an interrupt, which in turn
will wake up the system. Using asynchronous interrupts thus allows ADC operation in much
lower power states than would otherwise be possible.
Peripheral
Event
System
AST ADC
Interface
Trigger
conversion
Periodic peripheral
event
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28. Audio Bit Stream DAC (ABDACB)
Rev.: 1.0.0.0
28.1 Features
• 16 bit digital stereo DAC
• Oversampling D/A conversion architecture
– Adjustable oversampling ratio
– 3rd order Sigma-Delta D/A converters
• Digital bitstream output
• Parallel interface
• Connects to DMA for background transfer without CPU intervention
• Supported sampling frequencies
– 8000Hz, 11025Hz, 12000Hz, 16000Hz, 22050Hz, 24000Hz, 32000Hz, 44100Hz, and 48000Hz
• Supported data formats
– 32-, 24-, 20-, 18-, 16-, and 8-bit stereo format
– 16- and 8-bit compact stereo format, with left and right sample packed in the same word to
reduce data transfers
• Common mode offset control
• Volume control
28.2 Overview
The Audio Bitstream DAC (ABDACB) converts a 16-bit sample value to a digital bitstream with
an average value proportional to the sample value. Two channels are supported making the
Audio Bitstream DAC particularly suitable for stereo audio. Each channel has a pair of complementary
digital outputs, DAC and DACN, which can be connected to an external high input
impedance amplifier.
The Audio Bitstream DAC is made up of several signal processing blocks and a 3rd order Sigma
Delta D/A converter for each channel. The Sigma Delta modulator converts the parallel data to a
bitstream, while the signal processing blocks perform volume control, offset control, upsampling,
and filtering to compensate for the upsampling process. The upsampling is performed by a Cascaded
Integrator-Comb (CIC) filter, and the compensation filter is a Finite Impulse Response
(FIR) CIC compensation filter.
28.3 Block Diagram
Figure 28-1. ABDACB Block Diagram
User Inter af ce
Synchronizer
Volume control
Offset control
CIC Compensation
filter (FIR)
CIC
Comb
Section
CIC Integrator
section
Clock
divider
Sigma Delta
Modulator
Sigma Delta
Modulator
clk_abdacb gclk
Signal processing
(before up-sampling)
CLK
DAC[0]
DACN[0]
DAC[1]
DACN[1]
PB
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28.4 I/O Lines Description
28.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
28.5.1 I/O lines
The output pins used for the output bitstream from the Audio Bitstream DAC may be multiplexed
with I/O Controller lines.
Before using the Audio Bitstream DAC, the I/O Controller must be configured in order for the
Audio Bitstream DAC I/O lines to be in Audio Bitstream DAC peripheral mode.
28.5.2 Clocks
The clock for the ABDACB bus interface (CLK_ABDACB) is generated by the Power Manager.
This clock is turned on by default, and can be enabled and disabled in the Power Manager. It is
recommended to disable the ABDACB before disabling the clock, to avoid freezing the ABDACB
in an undefined state. Before using the Audio Bitstream DAC, the user must ensure that the
Audio Bitstream DAC clock is enabled in the Power Manager.
The Audio Bitstream DAC requires a separate clock for the D/A conversion. This clock is provided
by a generic clock which has to be set up in the System Control Interface (SCIF). The
frequency for this clock has to be set as described in Table 28-3 on page 697. It is important that
this clock is accurate and has low jitter. Incorrect frequency will result in too fast or too slow playback
(frequency shift), and too high jitter will add noise to the D/A conversion. For best
performance one should trade frequency accuracy (within some limits) for low jitter to obtain the
best performance as jitter will have large impact on the quality of the converted signal.
28.5.3 DMA
The ABDACB is connected to the Peripheral DMA controller. Using DMA to transfer data samples
requires the Peripheral DMA controller to be programmed before enabling the ABDACB.
28.5.4 Interrupts
The ABDACB interrupt request line is connected to the interrupt controller. Using the ABDACB
interrupt requires the interrupt controller to be programmed first.
Table 28-1. I/O Lines Description
Pin Name Pin Description Type
DAC[0] Output for channel 0 Output
DACN[0] Inverted output for channel 0 Output
DAC[1] Output for channel 1 Output
DACN[1] Inverted output for channel 1 Output
CLK Clock output for DAC Output
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28.6 Functional Description
28.6.1 Construction
The Audio Bitstream DAC is divided into several parts, the user interface, the signal processing
blocks, and the Sigma Delta modulator blocks. See Figure 28-1 on page 687. The user interface
is used to configure the signal processing blocks and to input new data samples to the converter.The
signal processing blocks manages volume control, offset control, and upsampling.
The Sigma Delta blocks converts the parallel data to1-bit bitstreams.
28.6.1.1 CIC Interpolation Filter
The interpolation filter in the system is a Cascaded Integrator-Comb (CIC) interpolation filter
which interpolates from Fs to {125, 128, 136}xFs depending on the control settings. This filter is a
4th order CIC filter, and the basic building blocks of the filter is a comb part and an integrator
part. Since the CIC interpolator has a sinc-function frequency response it is compensated by a
linear phase CIC compensation filter to make the passband response more flat in the range 0-
20kHz, see figure Figure 28-4 on page 693. The frequency response of this type of interpolator
has the first zero at the input sampling frequency. This means that the first repeated specters
created by the upsampling process will not be fully rejected and the output signal will contain signals
from these repeated specters. See Figure 28-6 on page 694.
Since the human ear can not hear frequencies above 20kHz, we should not be affected by this
when the sample rate is above 40kHz, but digital measurement equipment will be affected. This
need to be accounted for when doing measurements on the system to prevent aliasing and
incorrect measurement results.
28.6.1.2 Sigma Delta Modulator
The Sigma Delta modulator is a 3rd order modulator consisting of three differentiators (delta
blocks), three integrators (sigma blocks), and a one bit quantizer. The purpose of the integrators
is to shape the noise, so that the noise is reduced in the audio passband and increased at the
higher frequencies, where it can be filtered out by an analog low-pass filter. To be able to filter
out all the noise at high frequencies the analog low-pass filter must be one order larger than the
Sigma Delta modulator.
28.6.1.3 Recreating the Analog Signal
Since the DAC and DACN outputs from the ABDAC are digital square wave signals, they have
to be passed through a low pass filter to recreate the analog signal. This also means that noise
on the IO voltage will couple through to the analog signal. To remove some of the IO noise the
ABDAC can output a clock signal, CLK, which can be used to resample the DAC and DACN signals
on external Flip-Flops powered by a clean supply.
28.6.2 Initialization
Before enabling the ABDACB the correct configuration must be applied to the Control Register
(CR). Configuring the Alternative Upsampling Ratio bit (CR.ALTUPR), Common Mode Offset
Control bit (CR.CMOC), and the Sampling Frequency field (CR.FS) according to the sampling
rate of the data that is converted and the type of amplifier the outputs are connected to is
required to get the correct behavior of the system. When the correct configuration is applied the
ABDACB can be enabled by writing a one to the Enable bit in the Control Register (CR.EN). The
module is disabled by writing a zero to the Enable bit. The module should be disabled before
entering sleep modes to ensure that the outputs are not left in an undesired state.
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28.6.3 Basic operation
To convert audio data to a digital bitstream the user must first initialize the ABDACB as
described in Section 28.6.2. When the ABDACB is initialized and enabled it will indicate that it is
ready to receive new data by setting the Transmit Ready bit in the Status Register (SR.TXRDY).
When the TXRDY bit is set in the Status Register the user has to write new samples to Sample
Data Register 0 (SDR0) and Sample Data Register 1 (SDR1). If the Mono Mode (MONO) bit in
the Control Register (CR) is set, or one of the compact stereo formats are used by configuring
the Data Word Format (DATAFORMAT) in the Control Register, only SDR0 has to be written.
Failing to write to the sample data registers will result in an underrun indicated by the Transmit
Underrun (TXUR) bit in the Status Register (SR.TXUR). When new samples are written to the
sample data registers the TXRDY bit will be cleared.
To increase performance of the system an interrupt handler or DMA transfer can be used to
write new samples to the sample data registers. See Section 28.6.10 for details on DMA, and
Section 28.6.11 for details on interrupt.
28.6.4 Data Format
The input data type is two’s complement. The Audio Bitstream DAC can be configured to accept
different audio formats. The format must be configured in the Data Word Format field in the Control
Register. In regular operation data for the two channels are written to the sample data
registers SDR0 and SDR1. If the data format field specifies a format using less than 32 bits, data
must be written right-justified in SDR0 and SDR1. Sign extension into the unused bits is not necessary.
Only the 16 most significant bits in the data will be used by the ABDACB. For data
formats larger than 16 bits the least significant bits are ignored. For 8-bit data formats the 8 bits
will be used as the most significant bits in the 16-bit samples, the additional bits will be zeros.
The ABDACB also supports compact data formats for 16- and 8-bit samples. For 16-bit samples
the sample for channel 0 must be written to bits 15 through 0 and the sample for channel 1 must
be written to bits 31 through 16 in SDR0. For 8-bit samples the sample for channel 0 must be
written to bits 7 through 0 and the sample for channel 1 must be written to bits 15 through 8 in
SDR0. SDR1 is not used in this mode. See Table 28-5 on page 699.
28.6.5 Data Swapping
When the Swap Channels (SWAP) bit in the Control Register (CR.SWAP) is one, writing to the
Sample Data Register 0 (SDR0) will put the data in Sample Data Register 1 (SDR1). Writing
SDR1 will put the data in SDR0. If one of the two compact stereo formats is used the lower and
upper halfword of SDR0 will be swapped when writing to SDR0.
28.6.6 Common Mode Offset Control
When the Common Mode Offset Control (CMOC) bit in the Control Register is one the input data
will get a DC value applied to it and the amplitude will be scaled. This will make the common
mode offset of the two corresponding outputs, DAC and DACN, to move away from each other
so that the output signals are not overlapping. The result is that the two signals can be applied to
a differential analog filter, and the difference will always be a positive value, removing the need
for a negative voltage supply for the filter. The cost of doing this a 3dB loss in dynamic range. On
the left side of Figure 28-2 one can see the filtered output from the DAC and DACN pins when a
sine wave is played when CR.CMOC is zero. The waveform on the right side shows the output
of the differential filter when the two outputs on the left side are used as inputs to the differential
filter. Figure 28-3 show the corresponding outputs when CR.CMOC is one.
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Figure 28-2. Output signals with CMOC=0
Figure 28-3. Output signals with CMOC=1
28.6.7 Volume Control
The Audio Bitstream DAC have two volume control registers, Volume Control Register 0 (VCR0)
and Volume Control Register 1 (VCR1), that can be used to adjust the volume for the corresponding
channel. The volume control is linear and will only scale each sample according to the
value in the Volume Control (VOLUME) field in the volume control registers. The register also
has a Mute bit (MUTE) which can be used to mute the corresponding channel. The filtered out-
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put of the DAC pins will have a voltage given by the following equation, given that it is configured
to run at the default upsampling ratio of 128:
If one want to get coherence between the sign of the input data and the output voltage one can
use the DATAN outputs or invert the sign of the input data by software.
28.6.8 Mono
When the Mono bit (MONO) in the Control Register is set, data written to SDR0 will be used for
both output channels. If one of the compact stereo formats are used only the data written to the
part of SDR0 that corresponds with channel 0 is used.
28.6.9 Alternative Upsampling Ratio
The digital filters and Sigma Delta modulators requires its own clock to perform the conversion at
the correct speed, and this clock is provided by a generic clock in the SCIF. The frequency of
this clock depends on the input sample rate and the upsampling ratio which is controlled by the
Alternative Upsampling Ratio bit (ALTUPR) in the Control Register.
The ABDACB supports three upsampling ratios, 125, 128, and 136. The default setting is a ratio
of 128, and is used when CR.ALTUPR is zero. Using this ratio gives a clock frequency requirement
that is common for audio products. In some cases one may want to use other clock
frequencies that already are available in the system. By writing a one to CR.ALTUPR a upsampling
ratio of 125 or 136 is used depending on the configuration of the Sampling Frequency field
in the Control Register. Refer to Table 28-3 for required clock frequency and settings.
The required clock frequency of the generic clock can be calculated from the following equation:
R is the upsampling ratio of the converter. If CR.ALTUPR is zero the upsampling ratio is 128. If
CR.ALTUPR is one, R will change to 125 when CR.FS is configured for 8kHz, 12kHz, 16kHz,
24kHz, 32kHz, and 48kHz. For the other configurations of CR.FS, 11.025kHz, 22.050kHz, and
44.100kHz, it will change to 136.
28.6.10 DMA operation
The Audio Bitstream DAC is connected to the Peripheral DMA Controller. The Peripheral DMA
Controller can be programmed to automatically transfer samples to the Sample Data Registers
(SDR0 and SDR1) when the Audio Bitstream DAC is ready for new samples. Two DMA channels
are used, one for each sample data register. If the Mono Mode bit in the Control Register
(CR.MONO) is one, or one of the compact stereo formats is used, only the DMA channel connected
to SDR0 will be used. When using DMA only the Control Register needs to be written in
the Audio Bitstream DAC. This enables the Audio Bitstream DAC to operate without any CPU
intervention such as polling the Status Register (SR) or using interrupts. See the Peripheral
DMA Controller documentation for details on how to setup Peripheral DMA transfers.
28.6.11 Interrupts
The ABDACB requires new data samples at a rate of FS. The interrupt status bits are used to
indicate when the system is ready to receive new samples. The Transmit Ready Interrupt Status
bit in the Status Register (SR.TXRDY) will be set whenever the ABDACB is ready to receive a
new sample. A new sample value must be written to the sample data registers (SDR0 and
VOUT
1
2
-- 33
128 – --------- SDR
215 ------------ VOLUME
215 – 1
------------------------ VVDDIO =
GCLK[Hz] F = S R 8
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SDR1) before 1/FS second, or an underrun will occur, as indicated by the Underrun Interrupt bit
in SR (SR.TXUR). The interrupt bits in SR are cleared by writing a one to the corresponding bit
in the Status Clear Register (SCR).
28.6.12 Frequency Response
Figure Figure 28-4 to Figure 28-7 show the frequency response for the system. The sampling
frequency used is 48kHz, but the response will be the same for other sampling frequencies,
always having the first zero at FS.
Figure 28-4. Passband Frequency Response
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Figure 28-5. Frequency Response up to Sampling Frequency
Figure 28-6. Frequency Response up to 3x Sampling Frequency
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Figure 28-7. Frequency Response up to 128x Sampling Frequency
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28.7 User Interface
Note: 1. The reset values are device specific. Please refer to the Module Configuration section at the end of this chapter.
Table 28-2. ABDACB Register Memory Map
Offset Register Register Name Access Reset
0x00 Control Register CR Read/Write 0x00000000
0x04 Sample Data Register 0 SDR0 Read/Write 0x00000000
0x08 Sample Data Register 1 SDR1 Read/Write 0x00000000
0x0C Volume Control Register 0 VCR0 Read/Write 0x00000000
0x10 Volume Control Register 1 VCR1 Read/Write 0x00000000
0x14 Interrupt Enable Register IER Write-only 0x00000000
0x18 Interrupt Disable Register IDR Write-only 0x00000000
0x1C Interrupt Mask Register IMR Read-only 0x00000000
0x20 Status Register SR Read-only 0x00000000
0x24 Status Clear Register SCR Write-only 0x00000000
0x28 Parameter Register PARAMETER Read-only -
(1)
0x2C Version Register VERSION Read-only -
(1)
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28.7.1 Control Register
Name: CR
Access Type: Read/Write
Offset: 0x00
Reset Value: 0x00000000
• FS: Sampling Frequency
Must be set to the matching data sampling frequency, see Table 28-3.
Note: 1. The actual clock requirement are 11.9952MHz, 23.9904MHz, and 47.9808MHz, but this is
very close to the suggested clock frequencies, and will only result in a very small frequency
shift. This need to be accounted for during testing if comparing to a reference signal.
Notes: 1.
31 30 29 28 27 26 25 24
- - - - FS
23 22 21 20 19 18 17 16
- - - - - DATAFORMAT
15 14 13 12 11 10 9 8
--------
76543210
SWRST - MONO CMOC ALTUPR - SWAP EN
Table 28-3. Generic Clock Requirements
CR.FS Description GCLK (CR.ALTUPR=1) GCLK (CR.ALTUPR=0)
0 8000Hz sampling frequency 8.0MHz 8.1920MHz
1 11025Hz sampling frequency 12.0MHz(1) 11.2896MHz
2 12000Hz sampling frequency 12.0MHz 12.2880MHz
3 16000Hz sampling frequency 16.0MHz 16.3840MHz
4 22050Hz sampling frequency 24.0MHz(1) 22.5792MHz
5 24000Hz sampling frequency 24.0MHz 24.5760MHz
6 32000Hz sampling frequency 32.0MHz 32.7680MHz
7 44100Hz sampling frequency 48.0MHz(1) 45.1584MHz
8 48000Hz sampling frequency 48.0MHz 49.1520MHz
Other Reserved - -
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• DATAFORMAT: Data Word Format
• SWRST: Software Reset
Writing a zero to this bit does not have any effect.
Writing a one to this bit will reset the ABDACB as if a hardware reset was done.
• MONO: Mono Mode
0: Mono mode is disabled.
1: Mono mode is enabled.
• CMOC: Common Mode Offset Control
0: Common mode adjustment is disabled.
1: Common mode adjustment is enabled.
• ALTUPR: Alternative Upsampling Ratio
0: Alternative upsampling is disabled.
1: Alternative upsampling is enabled.
• SWAP: Swap Channels
0: Channel swap is disabled.
1: Channel swap is enabled.
• EN: Enable
0: The ABDACB is disabled.
1: The ABDACB is enabled.
Table 28-4. Data Word Format
DATAFORMAT Word length Comment
0 32 bits
1 24 bits
2 20 bits
3 18 bits
4 16 bits
5 16 bits compact stereo Channel 1 sample in bits 31 through 16, channel 0 sample in bits 15 through 0 in SDR0
6 8 bits
7 8 bits compact stereo Channel 1 sample in bits 15 through 8, channel 0 sample in bits 7through 0 in SDR0
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28.7.2 Sample Data Register 0
Name: SDR0
Access Type: Read/Write
Offset: 0x04
Reset Value: 0x00000000
• DATA: Sample Data
Sample Data for channel 0 in two’s complement format. Data must be right-justified, see Table 28-5.
31 30 29 28 27 26 25 24
DATA[31:24]
23 22 21 20 19 18 17 16
DATA[23:16]
15 14 13 12 11 10 9 8
DATA[15:8]
76543210
DATA[7:0]
Table 28-5. Sample Data Register Formats
Data Format SDR0 SDR1 Comment
32 bits CH0 sample in DATA[31:0] CH1 sample in DATA[31:0]
24 bits CH0 sample in DATA[23:0] CH1 sample in DATA[23:0] Remaining bits are ignored.
20 bits CH0 sample in DATA[19:0] CH1 sample in DATA[19:0] Remaining bits are ignored.
18 bits CH0 sample in DATA[17:0] CH1 sample in DATA[17:0] Remaining bits are ignored.
16 bits CH0 sample in DATA[15:0] CH1 sample in DATA[15:0] Remaining bits are ignored.
16 bits compact stereo CH0 sample in DATA[15:0]
CH1 sample in DATA[31:16] Not used
8 bits CH0 sample in DATA[7:0] CH1 sample in DATA[7:0] Remaining bits are ignored.
8 bits compact stereo CH0 sample in DATA[7:0]
CH1 sample in DATA[15:8] Not used Remaining bits are ignored.
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28.7.3 Sample Data Register 1
Name: SDR1
Access Type: Read/Write
Offset: 0x08
Reset Value: 0x00000000
• DATA: Sample Data
Sample Data for channel 1 in two’s complement format. Data must be right-justified, see Table 28-5 on page 699.
31 30 29 28 27 26 25 24
DATA[31:24]
23 22 21 20 19 18 17 16
DATA[23:16]
15 14 13 12 11 10 9 8
DATA[15:8]
76543210
DATA[7:0]
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28.7.4 Volume Control Register 0
Name: VCR0
Access Type: Read/Write
Offset: 0x0C
Reset Value: 0x00000000
• MUTE: Mute
0: Channel 0 is not muted.
1: Channel 0 is muted.
• VOLUME: Volume Control
15-bit value adjusting the volume for channel 0.
31 30 29 28 27 26 25 24
MUTE - - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- VOLUME[14:8]
76543210
VOLUME[7:0]
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28.7.5 Volume Control Register 1
Name: VCR1
Access Type: Read/Write
Offset: 0x10
Reset Value: 0x00000000
• MUTE: Mute
0: Channel 1 is not muted.
1: Channel 1 is muted.
• VOLUME: Volume Control
15-bit value adjusting the volume for channel 1.
31 30 29 28 27 26 25 24
MUTE - - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- VOLUME[14:8]
76543210
VOLUME[7:0]
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28.7.6 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x14
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - TXUR TXRDY -
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28.7.7 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x18
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - TXUR TXRDY -
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28.7.8 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x1C
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - TXUR TXRDY -
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28.7.9 Status Register
Name: SR
Access Type: Read-only
Offset: 0x20
Reset Value: 0x00000000
• TXUR: Transmit Underrun
This bit is cleared when no underrun has occurred since the last time this bit was cleared (by reset or by writing to SCR).
This bit is set when at least one underrun has occurred since the last time this bit was cleared (by reset or by writing to SCR).
• TXRDY: Transmit Ready
This bit is cleared when the ABDACB is not ready to receive a new data in SDR.
This bit is set when the ABDACB is ready to receive a new data in SDR.
• BUSY: ABDACB Busy
This bit is set when the ABDACB is busy doing a data transfer between clock domains. CR, SDR0, and SDR1 can not be written
during this time.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - TXUR TXRDY BUSY
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28.7.10 Status Clear Register
Name: SCR
Access Type: Write-only
Offset: 0x24
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in SR and the corresponding interrupt request.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - TXUR TXRDY -
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28.7.11 Parameter Register
Name: PARAMETER
Access Type: Read-only
Offset: 0x28
Reset Value: 0x00000000
Reserved. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
--------
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28.7.12 Version Register
Name: VERSION
Access Type: Read-only
Offset: 0x2C
Reset Value: 0x00000000
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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28.8 Module Configuration
The specific configuration for each ABDACB instance is listed in the following tables.The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 28-6. ABDACB Clocks
Clock Name Description
CLK_ABDACB Clock for the ABDACB bus interface
GCLK The generic clock used for the ABDACB is GCLK6
Table 28-7. Register Reset Values
Register Reset Value
VERSION 0x00000100
PARAMETER 0x00000000
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29. ADC Interface (ADCIFB)
Rev:1.0.1.1
29.1 Features
• Multi-channel Analog-to-Digital Converter with up to 12-bit resolution
• Enhanced Resolution Mode
– 11-bit resolution obtained by interpolating 4 samples
– 12-bit resolution obtained by interpolating 16 samples
• Glueless interface with resistive touch screen panel, allowing
– Resistive Touch Screen position measurement
– Pen detection and pen loss detection
• Integrated enhanced sequencer
– ADC Mode
– Resistive Touch Screen Mode
• Numerous trigger sources
– Software
– Embedded 16-bit timer for periodic trigger
– Pen detect trigger
– Continuous trigger
– External trigger, rising, falling, or any-edge trigger
– Peripheral event trigger
• ADC Sleep Mode for low power ADC applications
• Programmable ADC timings
– Programmable ADC clock
– Programmable startup time
29.2 Overview
The ADC Interface (ADCIFB) converts analog input voltages to digital values. The ADCIFB is
based on a Successive Approximation Register (SAR) 10-bit Analog-to-Digital Converter (ADC).
The conversions extend from 0V to ADVREFP.
The ADCIFB supports 8-bit and 10-bit resolution mode, in addition to enhanced resolution mode
with 11-bit and 12-bit resolution. Conversion results are reported in a common register for all
channels.
The 11-bit and 12-bit resolution modes are obtained by interpolating multiple samples to acquire
better accuracy. For 11-bit mode 4 samples are used, which gives an effective sample rate of
1/4 of the actual sample frequency. For 12-bit mode 16 samples are used, giving a effective
sample rate of 1/16 of actual. This arrangement allows conversion speed to be traded for better
accuracy.
Conversions can be started for all enabled channels, either by a software trigger, by detection of
a level change on the external trigger pin (TRIGGER), or by an integrated programmable timer.
When the Resistive Touch Screen Mode is enabled, an integrated sequencer automatically configures
the pad control signals and performs resistive touch screen conversions.
The ADCIFB also integrates an ADC Sleep Mode, a Pen-Detect Mode, and an Analog Compare
Mode, and connects with one Peripheral DMA Controller channel. These features reduce both
power consumption and processor intervention.
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29.3 Block Diagram
Figure 29-1. ADCIFB Block Diagram
ADVREFP
Analog Multiplexer
Successive
Approximation
Register
Analog-to-Digital
Converter
Trigger
ADC Control
Logic
Timer
User
Interface
AD0
AD1
AD3
ADn
AD2
Resisitve Touch
Screen
Sequencer
CLK_ADCIFB
....
ADCIFB
ADP0
ADP1
I/O Controller
TRIGGER
Peripheral
Bus
DMA
Request
Interrupt
Request
CLK_ADC
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29.4 I/O Lines Description
29.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
29.5.1 I/O Lines
The analog input pins can be multiplexed with I/O Controller lines. The user must make sure the
I/O Controller is configured correctly to allow the ADCIFB access to the AD pins before the
ADCIFB is instructed to start converting data. If the user fails to do this the converted data may
be wrong.
The number of analog inputs is device dependent, please refer to the ADCIFB Module Configuration
chapter for the number of available AD inputs on the current device.
The ADVREFP pin must be connected correctly prior to using the ADCIFB. Failing to do so will
result in invalid ADC operation. See the Electrical Characteristics chapter for details.
If the TRIGGER, ADP0, and ADP1 pins are to be used in the application, the user must configure
the I/O Controller to assign the needed pins to the ADCIFB function.
29.5.2 Power Management
If the CPU enters a sleep mode that disables clocks used by the ADCIFB, the ADCIFB will stop
functioning and resume operation after the system wakes up from sleep mode.
If the Peripheral Event System is configured to send asynchronous peripheral events to the
ADCIFB and the clock used by the ADCIFB is stopped, a local and temporary clock will automatically
be requested so the event can be processed. Refer to Section 29.6.13, Section 29.6.12,
and the Peripheral Event System chapter for details.
Before entering a sleep mode where the clock to the ADCIFB is stopped, make sure the Analogto-Digital
Converter cell is put in an inactive state. Refer to Section 29.6.13 for more information.
29.5.3 Clocks
The clock for the ADCIFB bus interface (CLK_ADCIFB) is generated by the Power Manager.
This clock is enabled at reset, and can be disabled in the Power Manager. It is recommended to
disable the ADCIFB before disabling the clock, to avoid freezing the ADCIFB in an undefined
state.
Table 29-1. I/O Lines Description
Pin Name Description Type
ADVREFP Reference voltage Analog
TRIGGER External trigger Digital
ADP0 Drive Pin 0 for Resistive Touch Screen top channel (Xp) Digital
ADP1 Drive Pin 1 for Resistive Touch Screen right channel (Yp) Digital
AD0-ADn Analog input channels 0 to n Analog
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29.5.4 DMA
The ADCIFB DMA handshake interface is connected to the Peripheral DMA Controller. Using
the ADCIFB DMA functionality requires the Peripheral DMA Controller to be programmed first.
29.5.5 Interrupts
The ADCIFB interrupt request line is connected to the interrupt controller. Using the ADCIFB
interrupt request functionality requires the interrupt controller to be programmed first.
29.5.6 Peripheral Events
The ADCIFB peripheral events are connected via the Peripheral Event System. Refer to the
Peripheral Event System chapter for details
29.5.7 Debug Operation
When an external debugger forces the CPU into debug mode, this module continues normal
operation. If this module is configured in a way that requires it to be periodically serviced by the
CPU through interrupt requests or similar, improper operation or data loss may result during
debugging.
29.6 Functional Description
The ADCIFB embeds a Successive Approximation Register (SAR) Analog-to-Digital Converter
(ADC). The ADC supports 8-bit or 10-bit resolution, which can be extended to 11 or 12 bits by
the Enhanced Resolution Mode.
The conversion is performed on a full range between 0V and the reference voltage pin
ADVREFP. Analog inputs between these voltages converts to digital values (codes) based on a
linear conversion. This linear conversion is described in the expression below where M is the
number of bits used to represent the analog value, Vin is the voltage of the analog value to convert,
Vref is the maximum voltage, and Code is the converted digital value.
29.6.1 Initializing the ADCIFB
The ADC Interface is enabled by writing a one to the Enable bit in the Control Register (CR.EN).
After the ADC Interface is enabled, the ADC timings needs to be configured by writing the correct
values to the RES, PRESCAL, and STARTUP fields in the ADC Configuration Register
(ACR). See Section 29.6.5, and Section 29.6.7 for details. Before the ADCIFB can be used, the
I/O Controller must be configured correctly and the Reference Voltage (ADVREFP) signal must
be connected. Refer to Section 29.5.1 for details.
29.6.2 Basic Operation
To convert analog values to digital values the user must first initialize the ADCIFB as described
in Section 29.6.1. When the ADCIFB is initialized the channels to convert must be enabled by
writing a one the corresponding bits in the Channel Enable Register (CHER). Enabling channel
N instructs the ADCIFB to convert the analog voltage applied to AD pin N at each conversion
sequence. Multiple channels can be enabled resulting in multiple AD pins being converted at
each conversion sequence.
Code
2M Vin
Vref
= -------------------
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To start converting data the user can either manually start a conversion sequence by writing a
one to the START bit in the Control Register (CR.START) or configure an automatic trigger to
initiate the conversions. The automatic trigger can be configured to trig on many different conditions.
Refer to Section 29.8.1 for details.
The result of the conversion is stored in the Last Converted Data Register (LCDR) as they
become available, overwriting the result from the previous conversion. To avoid data loss if more
than one channel is enabled, the user must read the conversion results as they become available
either by using an interrupt handler or by using a Peripheral DMA channel to copy the
results to memory. Failing to do so will result in an Overrun Error condition, indicated by the
OVRE bit in the Status Register (SR).
To use an interrupt handler the user must enable the Data Ready (DRDY) interrupt request by
writing a one to the corresponding bit in the Interrupt Enable Register (IER). To clear the interrupt
after the conversion result is read, the user must write a one to the corresponding bit in the
Interrupt Clear Register (ICR). See Section 29.6.11 for details.
To use a Peripheral DMA Controller channel the user must configure the Peripheral DMA Controller
appropriately. The Peripheral DMA Controller will, when configured, automatically read
converted data as they become available. There is no need to manually clear any bits in the
Interrupt Status Register as this is performed by the hardware. If an Overrun Error condition happens
during DMA operation, the OVRE bit in the SR will be set.
29.6.3 ADC Resolution
The Analog-to-Digital Converter cell supports 8-bit or 10-bit resolution, which can be extended to
11-bit and 12-bit with the Enhanced Resolution Mode. The resolution is selected by writing the
selected resolution value to the RES field in the ADC Configuration Register (ACR). See Section
29.9.3.
By writing a zero to the RES field, the ADC switches to the lowest resolution and the conversion
results can be read in the eight lowest significant bits of the Last Converted Data Register
(LCDR). The four highest bits of the Last Converted Data (LDATA) field in the LCDR register
reads as zero. Writing a one to the RES field enables 10-bit resolution, the optimal resolution for
both sampling speed and accuracy. Writing two or three automatically enables Enhanced Resolution
Mode with 11-bit or 12-bit resolution, see Section 29.6.4 for details.
When a Peripheral DMA Controller channel is connected to the ADCIFB in 10-bit, 11-bit, or 12-
bit resolution mode, a transfer size of 16 bits must be used. By writing a zero to the RES field,
the destination buffers can be optimized for 8-bit transfers.
29.6.4 Enhanced Resolution Mode
The Enhanced Resolution Mode is automatically enabled when 11-bit or 12-bit mode is selected
in the ADC Configuration Register (ACR). In this mode the ADCIFB will trade conversion performance
for accuracy by averaging multiple samples.
To be able to increase the accuracy by averaging multiple samples it is important that some
noise is present in the input signal. The noise level should be between one and two LSB peakto-peak
to get good averaging performance.
The performance cost of enabling 11-bit mode is 4 ADC samples, which reduces the effective
ADC performance by a factor 4. For 12-bit mode this factor is 16. For 12-bit mode the effective
sample rate is maximum ADC sample rate divided by 16.
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29.6.5 ADC Clock
The ADCIFB generates an internal clock named CLK_ADC that is used by the Analog-to-Digital
Converter cell to perform conversions. The CLK_ADC frequency is selected by writing to the
PRESCAL field in the ADC Configuration Register (ACR). The CLK_ADC range is between
CLK_ADCIFB/2, if PRESCAL is 0, and CLK_ADCIFB/128, if PRESCAL is 63 (0x3F).
A sensible PRESCAL value must be used in order to provide an ADC clock frequency according
to the maximum sampling rate parameter given in the Electrical Characteristics section. Failing
to do so may result in incorrect Analog-to-Digital Converter operation.
29.6.6 ADC Sleep Mode
The ADC Sleep Mode maximizes power saving by automatically deactivating the Analog-to-Digital
Converter cell when it is not being used for conversions. The ADC Sleep Mode is enabled by
writing a one to the SLEEP bit in the ADC Configuration Register (ACR).
When a trigger occurs while the ADC Sleep Mode is enabled, the Analog-to-Digital Converter
cell is automatically activated. As the analog cell requires a startup time, the logic waits during
this time and then starts the conversion of the enabled channels. When conversions of all
enabled channels are complete, the ADC is deactivated until the next trigger.
29.6.7 Startup Time
The Analog-to-Digital Converter cell has a minimal startup time when the cell is activated. This
startup time is given in the Electrical Characteristics chapter and must be written to the
STARTUP field in the ADC Configuration Register (ACR) to get correct conversion results.
The STARTUP field expects the startup time to be represented as the number of CLK_ADC
cycles between 8 and 1024 and in steps of 8 that is needed to cover the ADC startup time as
specified in the Electrical Characteristics chapter.
The Analog-to-Digital Converter cell is activated at the first conversion after reset and remains
active if ACR.SLEEP is zero. If ACR.SLEEP is one, the Analog-to-Digital Converter cell is automatically
deactivated when idle and thus each conversion sequence will have a initial startup
time delay.
29.6.8 Sample and Hold Time
A minimal Sample and Hold Time is necessary for the ADCIFB to guarantee the best converted
final value when switching between ADC channels. This time depends on the input impedance
of the analog input, but also on the output impedance of the driver providing the signal to the
analog input, as there is no input buffer amplifier.
The Sample and Hold time has to be programmed through the SHTIM field in the ADC Configuration
Register (ACR). This field can define a Sample and Hold time between 1 and 16
CLK_ADC cycles.
29.6.9 ADC Conversion
ADC conversions are performed on all enabled channels when a trigger condition is detected.
For details regarding trigger conditions see Section 29.8.1. The term channel is used to identify
a specific analog input pin so it can be included or excluded in an Analog-to-Digital conversion
sequence and to identify which AD pin was used to convert the current value in the Last Converted
Data Register (LCDR). Channel number N corresponding to AD pin number N.
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Channels are enabled by writing a one to the corresponding bit in the Channel Enable Register
(CHER), and disabled by writing a one to the corresponding bit in the Channel Disable Register
(CHDR). Active channels are listed in the Channel Status Register (CHSR).
When a conversion sequence is started, all enabled channels will be converted in one sequence
and the result will be placed in the Last Converted Data Register (LCDR) with the channel number
used to produce the result. It is important to read out the results while the conversion
sequence is ongoing, as new values will automatically overwrite any old value and the old value
will be lost if not previously read by the user.
If the Analog-to-Digital Converter cell is inactive when starting a conversion sequence, the conversion
logic will wait a configurable number of CLK_ADC cycles as defined in the startup time
field in the ADC Configuration Register (ACR). After the cell is activated all enabled channels is
converted one by one until no more enabled channels exist. The conversion sequence converts
each enabled channel in order starting with the channel with the lowest channel number. If the
ACR.SLEEP bit is one, the Analog-to-Digital Converter cell is deactivated after the conversion
sequence has finished.
For each channel converted, the ADCIFB waits a Sample and Hold number of CLK_ADC cycles
as defined in the SHTIM field in ACR, and then instructs the Analog-to-Digital Converter cell to
start converting the analog voltage. The ADC cell requires 10 CLK_ADC cycles to actually convert
the value, so the total time to convert a channel is Sample and Hold + 10 CLK_ADC cycles.
29.6.10 Analog Compare Mode
The ADCIFB can test if the converted values, as they become available, are below, above, or
inside a specified range and generate interrupt requests based on this information. This is useful
for applications where the user wants to monitor some external analog signal and only initiate
actions if the value is above, below, or inside some specified range.
The Analog Compare mode is enabled by writing a one to the Analog Compare Enable (ACE) bit
in the Mode Register (MR). The values to compare must be written to the Low Value (LV) field
and the High Value (HV) field in the Compare Value Register (CVR). The Analog Compare
mode will, when enabled, check all enabled channels against the pre-programmed high and low
values and set status bits.
To generate an interrupt request if a converted value is below a limit, write the limit to the
CVR.LV field and enable interrupt request on the Compare Lesser Than (CLT) bit by writing a
one to the corresponding bit in the Interrupt Enable Register (IER). To generate an interrupt
request if a converted value is above a limit, write the limit to the CVR.HV field and enable interrupt
for Compare Greater Than (CGT) bit. To generate an interrupt request if a converted value
is inside a range, write the low and high limit to the LV and HV fields and enable the Compare
Else (CELSE) interrupt. To generate an interrupt request if a value is outside a range, write the
LV and HV fields to the low and high limits of the range and enable CGT and CLT interrupts.
Note that the values written to LV and HV must match the resolution selected in the ADC Configuration
Register (ACR).
29.6.11 Interrupt Operation
Interrupt requests are enabled by writing a one to the corresponding bit in the Interrupt Enable
Register (IER) and disabled by writing a one to the corresponding bit in the Interrupt Disable
Register (IDR). Enabled interrupts can be read from the Interrupt Mask Register (IMR). Active
interrupt requests, but potentially masked, are visible in the Interrupt Status Register (ISR). To
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clear an active interrupt request, write a one to the corresponding bit in the Interrupt Clear Register
(ICR).
The source for the interrupt requests are the status bits in the Status Register (SR). The SR
shows the ADCIFB status at the time the register is read. The Interrupt Status Register (ISR)
shows the status since the last write to the Interrupt Clear Register. The combination of ISR and
SR allows the user to react to status change conditions but also allows the user to read the current
status at any time.
29.6.12 Peripheral Events
The Peripheral Event System can be used together with the ADCIFB to allow any peripheral
event generator to be used as a trigger source. To enable peripheral events to trigger a conversion
sequence the user must write the Peripheral Event Trigger value (0x7) to the Trigger Mode
(TRGMOD) field in the Trigger Register (TRGR). Refer to Table 29-4 on page 730. The user
must also configure a peripheral event generator to emit peripheral events for the ADCIFB to
trigger on. Refer to the Peripheral Event System chapter for details.
29.6.13 Sleep Mode
Before entering sleep modes the user must make sure the ADCIFB is idle and that the Analogto-Digital
Converter cell is inactive. To deactivate the Analog-to-Digital Converter cell the SLEEP
bit in the ADC Configuration Register (ACR) must be written to one and the ADCIFB must be
idle. To make sure the ADCIFB is idle, write a zero the Trigger Mode (TRGMOD) field in the
Trigger Register (TRGR) and wait for the READY bit in the Status Register (SR) to be set.
Note that by deactivating the Analog-to-Digital Converter cell, a startup time penalty as defined
in the STARTUP field in the ADC Configuration Register (ACR) will apply on the next
conversion.
29.6.14 Conversion Performances
For performance and electrical characteristics of the ADCIFB, refer to the Electrical Characteristics
chapter.
29.7 Resistive Touch Screen
The ADCIFB embeds an integrated Resistive Touch Screen Sequencer that can be used to calculate
contact coordinates on a resistive touch screen film. When instructed to start, the
integrated Resistive Touch Screen Sequencer automatically applies a sequence of voltage patterns
to the resistive touch screen films and the Analog-to-Digital Conversion cell is used to
measure the effects. The resulting measurements can be used to calculate the horizontal and
vertical contact coordinates. It is recommended to use a high resistance touch screen for optimal
resolution.
The resistive touch screen film is connected to the ADCIFB using the AD and ADP pins. See
Section 29.7.3 for details.
Resistive Touch Screen Mode is enabled by writing a one to the Touch Screen ADC Mode field
in the Mode Register (MR.TSAMOD). In this mode, channels TSPO+0 though TSPO+3 are
automatically enabled where TSPO refers to the Touch Screen Pin Offset field in the Mode Register
(MR.TSPO). For each conversion sequence, all enabled channels before TSPO+0 and
after TSPO+3 are converted as ordinary ADC channels, producing 1 conversion result each.
When the sequencer enters the TSPO+0 channel the Resistive Touch Screen Sequencer will
take over control and convert the next 4 channels as described in Section 29.7.4.
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29.7.1 Resistive Touch Screen Principles
A resistive touch screen is based on two resistive films, each one fitted with a pair of electrodes,
placed at the top and bottom on one film, and on the right and left on the other. Between the two,
there is a layer that acts as an insulator, but makes a connection when pressure is applied to the
screen. This is illustrated in Figure 29-2 on page 719.
Figure 29-2. Resistive Touch Screen Position Measurement
29.7.2 Position Measurement Method
As shown in Figure 29-2 on page 719, to detect the position of a contact, voltage is first applied
to XP (top) and Xm (bottom) leaving Yp and Ym tristated. Due to the linear resistance of the film,
there is a voltage gradient from top to bottom on the first film. When a contact is performed on
the screen, the voltage at the contact point propagates to the second film. If the input impedance
on the YP (right) and Ym (left) electrodes are high enough, no current will flow, allowing the voltage
at the contact point to be measured at Yp. The value measured represents the vertical
position component of the contact point.
For the horizontal direction, the same method is used, but by applying voltage from YP (right) to
Ym (left) and measuring at XP.
In an ideal world (linear, with no loss), the vertical position is equal to:
VYP / VDD
To compensate for some of the real world imperfections, VXP and VXm can be measured and
used to improve accuracy at the cost of two more conversions per axes. The new expression for
the vertical position then becomes:
(VYP - VXM) / (VXP - VXM)
XM
XP
YM YP
XP
XM
YP
VDD
GND
Volt
Horizontal Position Detection
YP
YM
XP
VDD
GND
Volt
Vertical Position Detection
Pen
Contact
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29.7.3 Resistive Touch Screen Pin Connections
The resistive touch screen film signals connects to the ADCIFB using the AD and ADP pins. The
XP (top) and XM (bottom) film signals are connected to ADtspo+0 and ADtspo+1 pins, and the YP
(right) and YM (left) signals are connected to ADtspo+2 and ADtspo+3 pins. The tspo index is
configurable through the Touch Screen Pin Offset (TSPO) field in the Mode Register (MR) and
allows the user to configure which AD pins to use for resistive touch screen applications. Writing
a zero to the TSPO field instructs the ADCIFB to use AD0 through AD3, where AD0 is connected
to XP, AD1 is connected to XM and so on. Writing a one to the TSPO field instructs the
ADCIFB to use AD1 through AD4 for resistive touch screen sequencing, where AD1 is connected
to XP and AD0 is free to be used as an ordinary ADC channel.
When the Analog Pin Output Enable (APOE) bit in the Mode Register (MR) is zero, the AD pins
are used to measure input voltage and drive the GND sequences, while the ADP pins are used
to drive the VDD sequences. This arrangement allows the user to reduce the voltage seen at the
AD input pins by inserting external resistors between ADP0 and XP and ADP1 and YP signals
which are again directly connected to the AD pins. It is important that the voltages observed at
the AD pins are not higher than the maximum allowed ADC input voltage. See Figure 29-3 on
page 721 for details regarding how to connect the resistive touch screen films to the AD and
ADP pins.
By adding a resistor between ADP0 and XP, and ADP1 and YP, the maximum voltage observed
at the AD pins can be controlled by the following voltage divider expressions:
The Rfilmx parameter is the film resistance observed when measuring between XP and XM. The
Rresistorx parameter is the resistor size inserted between ADP0 and XP. The definition of Rfilmy
and Rresistory is the same but for ADP1, YP, and YM instead.
Table 29-2. Resistive Touch Screen Pin Connections
ADCIFB Pin TS Signal, APOE == 0 TS Signal, APOE == 1
ADP0 Xp through a resistor No Connect
ADP1 Yp through a resistor No Connect
ADtspo+0 Xp Xp
ADtspo+1 Xm Xm
ADtspo+2 Yp Yp
ADtspo+3 Ym Ym
V ADtspo + 0
Rfilmx
Rfilmx Rresistorx + -------------------------------------------- V DP0 =
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The ADP pins are used by default, as the APOE bit is zero after reset. Writing a one to the
APOE bit instructs the ADCIFB Resistive Touch Screen Sequencer to use the already connected
ADtspo+0 and ADtspo+2 pins to drive VDD to XP and YP signals directly. In this mode the
ADP pins can be used as general purpose I/O pins.
Before writing a one to the APOE bit the user must make sure that the I/O voltage is compatible
with the ADC input voltage. If the I/O voltage is higher than the maximum input voltage of the
ADC, permanent damage may occur. Refer to the Electrical Characteristics chapter for details.
Figure 29-3. Resistive Touch Screen Pin Connections
V ADtspo + 2
Rfilmy
Rfilmy Rresistory + -------------------------------------------- V DP1 =
ADtspo+1
XM
XP
YM YP
ADtspo+0
DP1
DP0
ADtspo+3
ADtspo+2
Analog Pin Output Enable (MR.APOE) == 0
ADtspo+1
XM
XP
YM YP
ADtspo+0
DP1
DP0
ADtspo+3
ADtspo+2
Analog Pin Output Enable (MR.APOE) == 1
NC
NC
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29.7.4 Resistive Touch Screen Sequencer
The Resistive Touch Screen Sequencer is responsible for applying voltage to the resistive touch
screen films as described in Section 29.7.2. This is done by controlling the output enable and the
output value of the ADP and AD pins. This allows the Resistive Touch Screen Sequencer to add
a voltage gradient on one film while keeping the other film floating so a touch can be measured.
The Resistive Touch Screen Sequencer will when measuring the vertical position, apply VDD
and GND to the pins connected to XP and XM. The YP and YM pins are put in tristate mode so the
measurement of YP can proceed without interference. To compensate for ADC offset errors and
non ideal pad drivers, the actual voltage of XP and XM is measured as well, so the real values for
VDD and GND can be used in the contact point calculation to increase accuracy. See second
formula in Section 29.7.2.
When the vertical values are converted the same setup is applies for the second axes, by setting
XP and XM in tristate mode and applying VDD and GND to YP and YM. Refer to Section 29.8.3 for
details.
29.7.5 Pen Detect
If no contact is applied to the resistive touch screen films, any resistive touch screen conversion
result will be undefined as the film being measured is floating. This can be avoided by enabling
Pen Detect and only trigger resistive touch screen conversions when the Pen Contact
(PENCNT) status bit in the Status Register (SR) is one. Pen Detect is enabled by writing a one
to the Pen Detect (PENDET) bit in the Mode Register (MR).
When Pen Detect is enabled, the ADCIFB grounds the vertical panel by applying GND to XP and
XM and polarizes the horizontal panel by enabling pull-up on the pin connected to YP. The YM pin
will in this mode be tristated. Since there is no contact, no current is flowing and there is no
related power consumption. As soon as a contact occurs, GND will propagate to YM by pulling
down YP, allowing the contact to be registered by the ADCIFB.
A programmable debouncing filter can be used to filter out false pen detects because of noise.
The debouncing filter is programmable from one CLK_ADC period and up to 215 CLK_ADC periods.
The debouncer length is set by writing to the PENDBC field in MR.
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Figure 29-4. Resistive Touch Screen Pen Detect
The Resistive Touch Screen Pen Detect can be used to generate an ADCIFB interrupt request
or it can be used to trig a conversion, so that a position can be measured as soon as a contact is
detected.
The Pen Detect Mode generates two types of status signals, reported in the Status Register
(SR):
• The bit PENCNT is set when current flows and remains set until current stops.
• The bit NOCNT is set when no current flows and remains set until current flows.
Before a current change is reflected in the SR, the new status must be stable for the duration of
the debouncing time.
Both status conditions can generate an interrupt request if the corresponding bit in the Interrupt
Mask Register (IMR) is one. Refer to Section 29.6.11 on page 717.
XP
XM
YM
YP
Tristate
GND
Pullup T o the ADC
Debouncer Pen Interrupt
PENDBC
GND
Resistive
Touch Screen
Sequencer
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29.8 Operating Modes
The ADCIFB features two operating modes, each defining a separate conversion sequence:
• ADC Mode: At each trigger, all the enabled channels are converted.
• Resistive Touch Screen Mode: At each trigger, all enabled channels plus the resistive touch
screen channels are converted as described in Section 29.8.3. If channels except the
dedicated resistive touch screen channels are enabled, they are converted normally before
and after the resistive touch screen channels are converted.
The operating mode is selected by the TSAMOD field in the Mode Register (MR).
29.8.1 Conversion Triggers
A conversion sequence is started either by a software or by a hardware trigger. When a conversion
sequence is started, all enabled channels will be converted and made available in the
shared Last Converted Register (LCDR).
The software trigger is asserted by writing a one to the START field in the Control Register (CR).
The hardware trigger can be selected by the TRGMOD field in the Trigger Register (TRGR). Different
hardware triggers exist:
• External trigger, either rising or falling or any, detected on the external trigger pin TRIGGER
• Pen detect trigger, depending the PENDET bit in the Mode Register (MR)
• Continuous trigger, meaning the ADCIFB restarts the next sequence as soon as it finishes
the current one
• Periodic trigger, which is defined by the TRGR.TRGPER field
• Peripheral event trigger, allowing the Peripheral Event System to synchronize conversion with
some configured peripheral event source.
Enabling a hardware trigger does not disable the software trigger functionality. Thus, if a hardware
trigger is selected, the start of a conversion can still be initiated by the software trigger.
29.8.2 ADC Mode
In the ADC Mode, the active channels are defined by the Channel Status Register (CHSR). A
channel is enabled by writing a one to the corresponding bit in the Channel Enable Register
(CHER), and disabled by writing a one to the corresponding bit in the Channel Disable Register
(CHDR). The conversion results are stored in the Last Converted Data Register (LCDR) as they
become available, overwriting old conversions.
At each trigger, the following sequence is performed:
1. If ACR.SLEEP is one, wake up the ADC and wait for the startup time.
2. If Channel 0 is enabled, convert Channel 0 and store result in LCDR.
3. If Channel 1 is enabled, convert Channel 1 and store result in LCDR.
4. If Channel N is enabled, convert Channel N and store result in LCDR.
5. If ACR.SLEEP is one, place the ADC cell in a low-power state.
If the Peripheral DMA Controller is enabled, all converted values are transferred continuously
into the memory buffer.
29.8.3 Resistive Touch Screen Mode
Writing a one to the TSAMOD field in the Mode Register (MR) enables Resistive Touch Screen
Mode. In this mode the channels TSPO+0 to TSPO+3, corresponding to the resistive touch
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screen inputs, are automatically activated. In addition, if any other channels are enabled, they
will be converted before and after the resistive touch screen conversion.
At each trigger, the following sequence is performed:
1. If ACR.SLEEP is one, wake up the ADC cell and wait for the startup time.
2. Convert all enabled channels before TSPO and store the results in the LCDR.
3. Apply supply on the inputs XP and XM during the Sample and Hold Time.
4. Convert Channel XM and store the result in TMP.
5. Apply supply on the inputs XP and XM during the Sample and Hold Time.
6. Convert Channel XP, subtract TMP from the result and store the subtracted result in
LCDR.
7. Apply supply on the inputs XP and XM during the Sample and Hold Time.
8. Convert Channel YP, subtract TMP from the result and store the subtracted result in
LCDR.
9. Apply supply on the inputs YP and YM during the Sample and Hold Time.
10. Convert Channel YM and store the result in TMP.
11. Apply supply on the inputs YP and YM during the Sample and Hold Time.
12. Convert Channel YP, subtract TMP from the result and store the subtracted result in
LCDR.
13. Apply supply on the inputs YP and YM during the Sample and Hold Time.
14. Convert Channel XP, subtract TMP from the result and store the subtracted result in
LCDR.
15. Convert all enabled channels after TSPO + 3 and store results in the LCDR.
16. If ACR.SLEEP is one, place the ADC cell in a low-power state.
The resulting buffer structure stored in memory is:
1. XP - XM
2. YP - XM
3. YP - YM
4. XP - YM.
The vertical position can be easily calculated by dividing the data at offset 1(XP - XM) by the data
at offset 2(YP - XM).
The horizontal position can be easily calculated by dividing the data at offset 3(YP - YM) by the
data at offset 4(XP - YM).
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29.9 User Interface
Note: 1. The reset values for these registers are device specific. Please refer to the Module Configuration section at the end of this
chapter.
Table 29-3. ADCIFB Register Memory Map
Offset Register Name Access Reset
0x00 Control Register CR Write-only -
0x04 Mode Register MR Read/Write 0x00000000
0x08 ADC Configuration Register ACR Read/Write 0x00000000
0x0C Trigger Register TRGR Read/Write 0x00000000
0x10 Compare Value Register CVR Read/Write 0x00000000
0x14 Status Register SR Read-only 0x00000000
0x18 Interrupt Status Register ISR Read-only 0x00000000
0x1C Interrupt Clear Register ICR Write-only -
0x20 Interrupt Enable Register IER Write-only -
0x24 Interrupt Disable Register IDR Write-only -
0x28 Interrupt Mask Register IMR Read-only 0x00000000
0x2C Last Converted Data Register LCDR Read-only 0x00000000
0x30 Parameter Register PARAMETER Read-only -(1)
0x34 Version Register VERSION Read-only -(1)
0x40 Channel Enable Register CHER Write-only -
0x44 Channel Disable Register CHDR Write-only -
0x48 Channel Status Register CHSR Read-only 0x00000000
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29.9.1 Control Register
Register Name: CR
Access Type: Write-only
Offset: 0x00
Reset Value: 0x00000000
• DIS: ADCDIFB Disable
Writing a zero to this bit has no effect.
Writing a one to this bit disables the ADCIFB.
Note: Disabling the ADCIFB effectively stops all clocks in the module so the user must make sure the ADCIFB is idle before
disabling the ADCIFB.
• EN: ADCIFB Enable
Writing a zero to this bit has no effect.
Writing a one to this bit enables the ADCIFB.
Note: The ADCIFB must be enabled before use.
• START: Start Conversion
Writing a zero to this bit has no effect.
Writing a one to this bit starts an Analog-to-Digital conversion.
• SWRST: Software Reset
Writing a zero to this bit has no effect.
Writing a one to this bit resets the ADCIFB, simulating a hardware reset.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - - DIS EN
76543210
- - - - - - START SWRST
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29.9.2 Mode Register
Name: MR
Access Type: Read/Write
Offset: 0x04
Reset Value: 0x00000000
• PENDBC: Pen Detect Debouncing Period
Period = 2PENDBC*TCLK_ADC
• TSPO: Touch Screen Pin Offset
The Touch Screen Pin Offset field is used to indicate which AD pins are connected to the resistive touch screen film edges. Only
an offset is specified and it is assumed that the resistive touch screen films are connected sequentially from the specified offset
pin and up to and including offset + 3 (4 pins).
• APOE: Analog Pin Output Enable
0: AD pins are not used to drive VDD in resistive touch screen sequence.
1: AD pins are used to drive VDD in resistive touch screen sequence.
Note: If the selected I/O voltage configuration is incompatible with the Analog-to-Digital converter cell voltage specification, this
bit must stay cleared to avoid damaging the ADC. In this case the ADP pins must be used to drive VDD instead, as described in
Section 29.7.3. If the I/O and ADC voltages are compatible, the AD pins can be used directly by writing a one to this bit. In this
case the ADP pins can be ignored.
• ACE: Analog Compare Enable
0: The analog compare functionality is disabled.
1: The analog compare functionality is enabled.
• PENDET: Pen Detect
0: The pen detect functionality is disabled.
1: The pen detect functionality is enabled.
Note: Touch detection logic can only be enabled when the ADC sequencer is idle. For successful pen detection the user must
make sure there is enough idle time between consecutive scans for the touch detection logic to settle.
• TSAMOD: Touch Screen ADC Mode
0: Touch Screen Mode is disabled.
1: Touch Screen Mode is enabled.
31 30 29 28 27 26 25 24
PENDBC - - - -
23 22 21 20 19 18 17 16
TSPO
15 14 13 12 11 10 9 8
--------
76543210
- APOE ACE PENDET - - - TSAMOD
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29.9.3 ADC Configuration Register
Name: ACR
Access Type: Read/Write
Offset: 0x08
Reset Value: 0x00000000
• SHTIM: Sample & Hold Time for ADC Channels
• STARTUP: Startup Time
• PRESCAL: Prescaler Rate Selection
• RES: Resolution Selection
0: 8-bit resolution.
1: 10-bit resolution.
2: 11-bit resolution, interpolated.
3: 12-bit resolution, interpolated.
• SLEEP: ADC Sleep Mode
0: ADC Sleep Mode is disabled.
1: ADC Sleep Mode is enabled.
31 30 29 28 27 26 25 24
- - - - SHTIM
23 22 21 20 19 18 17 16
- STARTUP
15 14 13 12 11 10 9 8
- - PRESCAL
76543210
- - RES - - - SLEEP
TSAMPLE&HOLD SHTIM + 2 TCLK_ADC =
TARTUP STARTUP + 1 8 TCLK_AD =
TCLK_ADC = PRESCAL + 1 2 TCLK_ADCIFB
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29.9.4 Trigger Register
Name: TRGR
Access Type: Read/Write
Offset: 0x0C
Reset Value: 0x00000000
• TRGPER: Trigger Period
Effective only if TRGMOD defines a Periodic Trigger.
Defines the periodic trigger period, with the following equations:
Trigger Period = TRGPER *TCLK_ADC
• TRGMOD: Trigger Mode
31 30 29 28 27 26 25 24
TRGPER[15:8]
23 22 21 20 19 18 17 16
TRGPER[7:0]
15 14 13 12 11 10 9 8
--------
76543210
- - - - - TRGMOD
Table 29-4. Trigger Modes
TRGMOD Selected Trigger Mode
0 0 0 No trigger, only software trigger can start conversions
0 0 1 External Trigger Rising Edge
0 1 0 External Trigger Falling Edge
0 1 1 External Trigger Any Edge
100 Pen Detect Trigger (shall be selected only if PENDET is set and TSAMOD = Touch
Screen mode)
1 0 1 Periodic Trigger (TRGPER shall be initiated appropriately)
1 1 0 Continuous Mode
1 1 1 Peripheral Event Trigger
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29.9.5 Compare Value Register
Name: CVR
Access Type: Read/Write
Offset: 0x10
Reset Value: 0x00000000
• HV: High Value
Defines the high value used when comparing analog input.
• LV: Low Value
Defines the low value used when comparing analog input.
31 30 29 28 27 26 25 24
- - - - HV[11:8]
23 22 21 20 19 18 17 16
HV[7:0]
15 14 13 12 11 10 9 8
- - - - LV[11:8]
76543210
LV[7:0]
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29.9.6 Status Register
Name: SR
Access Type: Read-only
Offset: 0x14
Reset Value: 0x00000000
• EN: Enable Status
0: The ADCIFB is disabled.
1: The ADCIFB is enabled.
This bit is cleared when CR.DIS is written to one.
This bit is set when CR.EN is written to one.
• CELSE: Compare Else Status
This bit is cleared when either CLT or CGT are detected or when analog compare is disabled.
This bit is set when no CLT or CGT are detected on the last converted data and analog compare is enabled.
• CGT: Compare Greater Than Status
This bit is cleared when no compare greater than CVR.HV is detected on the last converted data or when analog compare is
disabled.
This bit is set when compare greater than CVR.HV is detected on the last converted data and analog compare is enabled.
• CLT: Compare Lesser Than Status
This bit is cleared when no compare lesser than CVR.LV is detected on the last converted data or when analog compare is
disabled.
This bit is set when compare lesser than CVR.LV is detected on the last converted data and analog compare is enabled.
• BUSY: Busy Status
This bit is cleared when the ADCIFB is ready to perform a conversion sequence.
This bit is set when the ADCIFB is busy performing a convention sequence.
• READY: Ready Status
This bit is cleared when the ADCIFB is busy performing a conversion sequence
This bit is set when the ADCIFB is ready to perform a conversion sequence.
• NOCNT: No Contact Status
This bit is cleared when no contact loss is detected or pen detect is disabled
This bit is set when contact loss is detected and pen detect is enabled.
• PENCNT: Pen Contact Status
This bit is cleared when no contact is detected or pen detect is disabled.
31 30 29 28 27 26 25 24
- - - - - - - EN
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- CELSE CGT CLT - - BUSY READY
76543210
- - NOCNT PENCNT - - OVRE DRDY
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This bit is set when pen contact is detected and pen detect is enabled.
• OVRE: Overrun Error Status
This bit is cleared when no Overrun Error has occurred since the start of a conversion sequence.
This bit is set when one or more Overrun Error has occurred since the start of a conversion sequence.
• DRDY: Data Ready Status
0: No data has been converted since the last reset.
1: One or more conversions have completed since the last reset and data is available in LCDR.
This bit is cleared when CR.SWRST is written to one.
This bit is set when one or more conversions have completed and data is available in LCDR.
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29.9.7 Interrupt Status Register
Name: ISR
Access Type: Read-only
Offset: 0x18
Reset Value: 0x00000000
• CELSE: Compare Else Status
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the corresponding bit in SR has a zero-to-one transition.
• CGT: Compare Greater Than Status
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the corresponding bit in SR has a zero-to-one transition.
• CLT: Compare Lesser Than Status
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the corresponding bit in SR has a zero-to-one transition.
• BUSY: Busy Status
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the corresponding bit in SR has a zero-to-one transition.
• READY: Ready Status
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the corresponding bit in SR has a zero-to-one transition.
• NOCNT: No Contact Status
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the corresponding bit in SR has a zero-to-one transition.
• PENCNT: Pen Contact Status
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the corresponding bit in SR has a zero-to-one transition.
• OVRE: Overrun Error Status
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the corresponding bit in SR has a zero-to-one transition.
• DRDY: Data Ready Status
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when a conversion has completed and new data is available in LCDR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- CELSE CGT CLT - - BUSY READY
76543210
- - NOCNT PENCNT - - OVRE DRDY
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29.9.8 Interrupt Clear Register
Name: ICR
Access Type: Write-only
Offset: 0x1C
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in ISR and the corresponding interrupt request.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- CELSE CGT CLT - - BUSY READY
76543210
- - NOCNT PENCNT - - OVRE DRDY
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29.9.9 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x20
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- CELSE CGT CLT - - BUSY READY
76543210
- - NOCNT PENCNT - - OVRE DRDY
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29.9.10 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x24
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- CELSE CGT CLT - - BUSY READY
76543210
- - NOCNT PENCNT - - OVRE DRDY
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29.9.11 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x28
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared by writing a one to the corresponding bit in Interrupt Disable Register (IDR).
A bit in this register is set by writing a one to the corresponding bit in Interrupt Enable Register (IER).
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- CELSE CGT CLT - - BUSY READY
76543210
- - NOCNT PENCNT - - OVRE DRDY
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29.9.12 Last Converted Data Register
Name: LCDR
Access Type: Read-only
Offset: 0x2C
Reset Value: 0x00000000
• LCCH: Last Converted Channel
This field indicates what channel was last converted, i.e. what channel the LDATA represents.
• LDATA: Last Data Converted
The analog-to-digital conversion data is placed in this register at the end of a conversion on any analog channel and remains
until a new conversion on any analog channel is completed.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
LCCH
15 14 13 12 11 10 9 8
- - - - LDATA[11:8]
76543210
LDATA[7:0]
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29.9.13 Parameter Register
Name: PARAMETER
Access Type: Read-only
Offset: 0x30
Reset Value: 0x00000000
• CHn: Channel n Implemented
0: The corresponding channel is not implemented.
1: The corresponding channel is implemented.
31 30 29 28 27 26 25 24
CH31 CH30 CH29 CH28 CH27 CH26 CH25 CH24
23 22 21 20 19 18 17 16
CH23 CH22 CH21 CH20 CH19 CH18 CH17 CH16
15 14 13 12 11 10 9 8
CH15 CH14 CH13 CH12 CH11 CH10 CH9 CH8
76543210
CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0
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29.9.14 Version Register
Name: VERSION
Access Type: Read-only
Offset: 0x34
Reset Value: 0x00000000
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the Module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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29.9.15 Channel Enable Register
Name: CHER
Access Type: Write-only
Offset: 0x40
Reset Value: 0x00000000
• CHn: Channel n Enable
Writing a zero to a bit in this register has no effect
Writing a one to a bit in this register enables the corresponding channel
The number of available channels is device dependent. Please refer to the Module Configuration section at the end of this
chapter for information regarding which channels are implemented.
31 30 29 28 27 26 25 24
CH31 CH30 CH29 CH28 CH27 CH26 CH25 CH24
23 22 21 20 19 18 17 16
CH23 CH22 CH21 CH20 CH19 CH18 CH17 CH16
15 14 13 12 11 10 9 8
CH15 CH14 CH13 CH12 CH11 CH10 CH9 CH8
76543210
CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0
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29.9.16 Channel Disable Register
Name: CHDR
Access Type: Write-only
Offset: 0x44
Reset Value: 0x00000000
• CHn: Channel N Disable
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register disables the corresponding channel.
Warning: If the corresponding channel is disabled during a conversion, or if it is disabled and then re-enabled during a
conversion, its associated data and its corresponding DRDY and OVRE bits in SR are unpredictable.
The number of available channels is device dependent. Please refer to the Module Configuration section at the end of this
chapter for information regarding how many channels are implemented.
31 30 29 28 27 26 25 24
CH31 CH30 CH29 CH28 CH27 CH26 CH25 CH24
23 22 21 20 19 18 17 16
CH23 CH22 CH21 CH20 CH19 CH18 CH17 CH16
15 14 13 12 11 10 9 8
CH15 CH14 CH13 CH12 CH11 CH10 CH9 CH8
76543210
CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0
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29.9.17 Channel Status Register
Name: CHSR
Access Type: Read-only
Offset: 0x48
Reset Value: 0x00000000
• CHn: Channel N Status
0: The corresponding channel is disabled.
1: The corresponding channel is enabled.
A bit in this register is cleared by writing a one to the corresponding bit in Channel Disable Register (CHDR).
A bit in this register is set by writing a one to the corresponding bit in Channel Enable Register (CHER).
The number of available channels is device dependent. Please refer to the Module Configuration section at the end of this
chapter for information regarding how many channels are implemented.
31 30 29 28 27 26 25 24
CH31 CH30 CH29 CH28 CH27 CH26 CH25 CH24
23 22 21 20 19 18 17 16
CH23 CH22 CH21 CH20 CH19 CH18 CH17 CH16
15 14 13 12 11 10 9 8
CH15 CH14 CH13 CH12 CH11 CH10 CH9 CH8
76543210
CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0
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29.10 Module Configuration
The specific configuration for each ADCIFB instance is listed in the following tables.The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Note: 1. AD3 does not exist
Table 29-5. Module Configuration
Feature ADCIFB
Number of ADC channels 9 (8 + 1 internal temperature sensor channel)
Table 29-6. ADCIFB Clocks
Clock Name Description
CLK_ADCIFB Clock for the ADCIFB bus interface
Table 29-7. Register Reset Values
Register Reset Value
VERSION 0x00000110
PARAMETER 0x000003FF
Table 29-8. ADC Input Channels(1)
Channel Input
CH0 AD0
CH1 AD1
CH2 AD2
CH4 AD4
CH5 AD5
CH6 AD6
CH7 AD7
CH8 AD8
CH9 Temperature sensor
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30. Analog Comparator Interface (ACIFB)
Rev: 2.0.2.2
30.1 Features
• Controls an array of Analog Comparators
• Low power option
– Single shot mode support
• Selectable settings for filter option
– Filter length and hysteresis
• Window Mode
– Detect inside/outside window
– Detect above/below window
• Interrupt
– On comparator result rising edge, falling edge, toggle
– Inside window, outside window, toggle
– When startup time has passed
• Can generate events to the peripheral event system
30.2 Overview
The Analog Comparator Interface (ACIFB) is able to control a number of Analog Comparators
(AC) with identical behavior. An Analog Comparator compares two voltages and gives a compare
output depending on this comparison.
The ACIFB can be configured in normal mode using each comparator independently or in window
mode using defined comparator pairs to observe a window.
The number of channels implemented is device specific. Refer to the Module Configuration section
at the end of this chapter for details.
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30.3 Block Diagram
Figure 30-1. ACIFB Block Diagram
30.4 I/O Lines Description
There are two groups of analog comparators, A and B, as shown in Table 30-1. In normal mode,
this grouping does not have any meaning. In window mode, two analog comparators, one from
group A and the corresponding comparator from group B, are paired.
……………...
TRIGGER
EVENTS
IRQ
GCLK
Peripheral Bus ACIFB
Analog
Comparators
PERIPHERAL
EVENT
GENERATION
-
+
AC
INN
INP
CONF0.INSELN
-
+
AC
INN
INP
CONFn.INSELN
FILTER
FILTER
INTERRUPT
GENERATION
CLK_ACIFB
CTRL.ACTEST
TR.ACTESTn
TR.ACTEST0
ACOUT0
ACOUTn
ACP0
ACN0
ACREFN
ACPn
ACNn
Table 30-1. Analog Comparator Groups for Window Mode
Group A Group B Pair Number
AC0 AC1 0
AC2 AC3 1
AC4 AC5 2
AC6 AC7 3
Table 30-2. I/O Line Description
Pin Name Pin Description Type
ACAPn Positive reference pin for Analog Comparator A n Analog
ACANn Negative reference pin for Analog Comparator A n Analog
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The signal names corresponds to the groups A and B of analog comparators. For normal mode,
the mapping from input signal names in the block diagram to the signal names is given in Table
30-3.
30.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
30.5.1 I/O Lines
The ACIFB pins are multiplexed with other peripherals. The user must first program the I/O Controller
to give control of the pins to the ACIFB.
30.5.2 Power Management
If the CPU enters a sleep mode that disables clocks used by the ACIFB, the ACIFB will stop
functioning and resume operation after the system wakes up from sleep mode.
30.5.3 Clocks
The clock for the ACIFB bus interface (CLK_ACIFB) is generated by the Power Manager. This
clock is enabled at reset, and can be disabled in the Power Manager. It is recommended to disable
the ACIFB before disabling the clock, to avoid freezing the ACIFB in an undefined state.
The ACIFB uses a GCLK as clock source for the Analog Comparators. The user must set up this
GCLK at the right frequency. The CLK_ACIFB clock of the interface must be at least 4x the
GCLK frequency used in the comparators. The GCLK is used both for measuring the startup
time of a comparator, and to give a frequency for the comparisons done in Continuous Measurement
Mode, see Section 30.6.
Refer to the Electrical Characteristics chapter for GCLK frequency limitations.
ACBPn Positive reference pin for Analog Comparator B n Analog
ACBNn Negative reference pin for Analog Comparator B n Analog
ACREFN Reference Voltage for all comparators selectable for INN Analog
Table 30-3. Signal Name Mapping
Pin Name Channel Number Normal Mode
ACAP0/ACAN0 0 ACP0/ACN0
ACBP0/ACBN0 1 ACP1/ACN1
ACAP1/ACAN1 2 ACP2/ACN2
ACBP1/ACBN1 3 ACP3/ACN3
ACAP2/ACAN2 4 ACP4/ACN4
ACBP2/ACBN2 5 ACP5/ACN5
ACAP3/ACAN3 6 ACP6/ACN6
ACBP3/ACBN3 7 ACP7/ACN7
Table 30-2. I/O Line Description
Pin Name Pin Description Type
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30.5.4 Interrupts
The ACIFB interrupt request line is connected to the interrupt controller. Using the ACIFB interrupt
requires the interrupt controller to be programmed first.
30.5.5 Peripheral Events
The ACIFB peripheral events are connected via the Peripheral Event System. Refer to the
Peripheral Event System chapter for details.
30.5.6 Debug Operation
When an external debugger forces the CPU into debug mode, the ACIFB continues normal
operation. If the ACIFB is configured in a way that requires it to be periodically serviced by the
CPU through interrupts or similar, improper operation or data loss may result during debugging.
30.6 Functional Description
The ACIFB is enabled by writing a one to the Control Register Enable bit (CTRL.EN). Additionally,
the comparators must be individually enabled by programming the MODE field in the AC
Configuration Register (CONFn.MODE).
The results from the individual comparators can either be used directly (normal mode), or the
results from two comparators can be grouped to generate a comparison window (window mode).
All comparators need not be in the same mode, some comparators may be in normal mode,
while others are in window mode. There are restrictions on which AC channels that can be
grouped together in a window pair, see Section 30.6.5.
30.6.1 Analog Comparator Operation
Each AC channel can be in one of four different modes, determined by CONFn.MODE:
• Off
• Continuous Measurement Mode (CM)
• User Triggered Single Measurement Mode (UT)
• Event Triggered Single Measurement Mode (ET)
After being enabled, a startup time defined in CTRL.SUT is required before the result of the
comparison is ready. The GCLK is used for measuring the startup time of a comparator,
During the startup time the AC output is not available. When the ACn Ready bit in the Status
Register (SR.ACRDYn) is one, the output of ACn is ready. In window mode the result is available
when both the comparator outputs are ready (SR.ACRDYn=1 and SR.ACRDYn+1=1).
30.6.1.1 Continuous Measurement Mode
In CM, the Analog Comparator is continuously enabled and performing comparisons. This
ensures that the result of the latest comparison is always available in the ACn Current Comparison
Status bit in the Status Register (SR.ACCSn). Comparisons are done on every positive
edge of GCLK.
CM is enabled by writing CONFn.MODE to 1. After the startup time has passed, a comparison is
done and SR is updated. Appropriate peripheral events and interrupts are also generated. New
comparisons are performed continuously until the CONFn.MODE field is written to 0.
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30.6.1.2 User Triggered Single Measurement Mode
In the UT mode, the user starts a single comparison by writing a one to the User Start Single
Comparison bit (CTRL.USTART). This mode is enabled by writing CONFn.MODE to 2. After the
startup time has passed, a single comparison is done and SR is updated. Appropriate peripheral
events and interrupts are also generated. No new comparisons will be performed.
CTRL.USTART is cleared automatically by hardware when the single comparison has been
done.
30.6.1.3 Event Triggered Single Measurement Mode
This mode is enabled by writing CONFn.MODE to 3 and Peripheral Event Trigger Enable
(CTRL.EVENTEN) to one. The ET mode is similar to the UT mode, the difference is that a
peripheral event from another hardware module causes the hardware to automatically set the
Peripheral Event Start Single Comparison bit (CTRL.ESTART). After the startup time has
passed, a single comparison is done and SR is updated. Appropriate peripheral events and
interrupts are also generated. No new comparisons will be performed. CTRL.ESTART is cleared
automatically by hardware when the single comparison has been done.
30.6.1.4 Selecting Comparator Inputs
Each Analog Comparator has one positive (INP) and one negative (INN) input. The positive
input is fed from an external input pin (ACPn). The negative input can either be fed from an
external input pin (ACNn) or from a reference voltage common to all ACs (ACREFN).
The user selects the input source as follows:
• In normal mode with the Negative Input Select and Positive Input Select fields
(CONFn.INSELN and CONFn.INSELP).
• In window mode with CONFn.INSELN, CONFn.INSELP and CONFn+1.INSELN,
CONFn+1,INSELP. The user must configure CONFn.INSELN and CONFn+1.INSELP to the
same source.
30.6.2 Interrupt Generation
The interrupt request will be generated if the corresponding bit in the Interrupt Mask Register
(IMR) is set. Bits in IMR are set by writing a one to the corresponding bit in the Interrupt Enable
Register (IER), and cleared by writing a one to the corresponding bit in the Interrupt Disable
Register (IDR). The interrupt request remains active until the corresponding bit in ISR is cleared
by writing a one to the corresponding bit in the Interrupt Status Clear Register (ICR).
30.6.3 Peripheral Event Generation
The ACIFB can be set up so that certain comparison results notify other parts of the device via
the Peripheral Event system. Refer to Section 30.6.4.3 and Section 30.6.5.3 for information on
which comparison results can generate events, and how to configure the ACIFB to achieve this.
Zero or one event will be generated per comparison.
30.6.4 Normal Mode
In normal mode all Analog Comparators are operating independently.
30.6.4.1 Normal Mode Output
Each Analog Comparator generates one output ACOUT according to the input voltages on INP
(AC positive input) and INN (AC negative input):
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• ACOUT = 1 if VINP > VINN
• ACOUT = 0 if VINP < VINN
• ACOUT = 0 if the AC output is not available (SR.ACRDY = 0)
The output can optionally be filtered, as described in Section 30.6.6.
30.6.4.2 Normal Mode Interrupt
The AC channels can generate interrupts. The Interrupt Settings field in the Configuration Register
(CONFn.IS) can be configured to select when the AC will generate an interrupt:
• When VINP > VINN
• When VINP < VINN
• On toggle of the AC output (ACOUT)
• When comparison has been done
30.6.4.3 Normal Mode Peripheral Events
The ACIFB can generate peripheral events according to the configuration of CONFn.EVENN
and CONFn.EVENP.
• When VINP > VINN or
• When VINP < VINN or
• On toggle of the AC output (ACOUT)
30.6.5 Window Mode
In window mode, two ACs (an even and the following odd build up a pair) are grouped.
The negative input of ACn (even) and the positive input of ACn+1 (odd) has to be connected
together externally to the device and are controlled by the Input Select fields in the AC Configuration
Registers (CONFn.INSELN and CONFn+1.INSELP). The positive input of ACn (even) and
the negative input of ACn+1 (odd) can still be configured independently by CONFn.INSELP and
CONFn+1.INSELN, respectively.
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Figure 30-2. Analog Comparator Interface in Window Mode
30.6.5.1 Window Mode Output
When operating in window mode, each channel generates the same ACOUT outputs as in normal
mode, see Section 30.6.4.1.
Additionally, the ACIFB generates a window mode signal (acwout) according to the common
input voltage to be compared:
• ACWOUT = 1 if the common input voltage is inside the window, VACN(N+1) < Vcommon < VACP(N)
• ACWOUT = 0 if the common input voltage is outside the window, Vcommon < VACN(N+1) or
Vcommon > VACP(N)
• ACWOUT = 0 if the window mode output is not available (SR.ACRDYn=0 or
SR.ACRDYn+1=0)
30.6.5.2 Window Mode Interrupts
When operating in window mode, each channel can generate the same interrupts as in normal
mode, see Section 30.6.4.2.
Additionally, when channels operate in window mode, programming Window Mode Interrupt Settings
in the Window Mode Configuration Register (CONFWn.WIS) can cause interrupts to be
generated when:
• As soon as the common input voltage is inside the window.
• As soon as the common input voltage is outside the window.
• On toggle of the window compare output (ACWOUT).
• When the comparison in both channels in the window pair is ready.
Comparator pair 0
-
+
AC0
Interrupt
Generator
Window
Module
ACOUT0
Peripheral Event
Generator
Window
window event
-
+
AC1
Filter
Filter
SR.ACCS0
SR.WFCS0
ACAP0
ACAN0
ACBP0
COMMON ACWOUT
ACBN0
IRQ
ACOUT1
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30.6.5.3 Window Mode Peripheral Events
When operating in window mode, each channel can generate the same peripheral events as in
normal mode, see Section 30.6.4.3.
Additionally, when channels operate in window mode, programming Window Mode Event Selection
Source (CONFWn.WEVSRC) can cause peripheral events to be generated when:
• As soon as the common input voltage is inside the window.
• As soon as the common input voltage is outside the window.
• On toggle of the window compare output (ACWOUT)
• Whenever a comparison is ready and the common input voltage is inside the window.
• Whenever a comparison is ready and the common input voltage is outside the window.
• When the comparison in both channels in the window pair is ready.
30.6.6 Filtering
The output of the comparator can be filtered to reduce noise. The filter length is determined by
the Filter Length field in the CONFn register (CONFn.FLEN). The filter samples the Analog
Comparator output at the GCLK frequency for 2CONFn.FLEN samples. A separate counter (CNT)
counts the number of cycles the AC output was one. This filter is deactivated if CONFn.FLEN
equals 0.
If the filter is enabled, the Hysteresis Value field HYS in the CONFn register (CONFn.HYS) can
be used to define a hysteresis value. The hysteresis value should be chosen so that:
The filter function is defined by:
The filtering algorithm is explained in Figure 30-3. 2FLEN measurements are sampled. If the number
of measurements that are zero is less than (2FLEN/2 - HYS), the filtered result is zero. If the
number of measurements that are one is more than (2FLEN/2 + HYS), the filtered result is one.
Otherwise, the result is unchanged.
2FLEN
2 ---------------- HYS
CNT 2FLEN
2 ---------------- + HYS comp = 1
2FLEN
2 ---------------- + HYS CNT 2FLEN
2 ----------------–HYS comp unchanged
CNT 2FLEN
2 ----------------–HYS comp = 0
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Figure 30-3. The Filtering Algorithm
30.7 Peripheral Event Triggers
Peripheral events from other modules can trigger comparisons in the ACIFB. All channels that
are set up in Event Triggered Single Measurement Mode will be started simultaneously when a
peripheral event is received. Channels that are operating in Continuous Measurement Mode or
User Triggered Single Measurement Mode will be unaffected by the received event. The software
can still operate these channels independently of channels in Event Triggered Single
Measurement Mode.
A peripheral event will trigger one or more comparisons, in normal or window mode.
30.8 AC Test mode
By writing the Analog Comparator Test Mode (CR.ACTEST) bit to one, the outputs from the ACs
are overridden by the value in the Test Register (TR), see Figure 30-1. This is useful for software
development.
2
FLEN
2
FLEN
2
HYS HYS
”Result=0" ”Result=1"
Result =
UNCHANGED
0
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30.9 User Interface
Note: 1. The reset values for these registers are device specific. Please refer to the Module Configuration section at the end of this
chapter.
Table 30-4. ACIFB Register Memory Map
Offset Register Register Name Access Reset
0x00 Control Register CTRL Read/Write 0x00000000
0x04 Status Register SR Read-only 0x00000000
0x10 Interrupt Enable Register IER Write-only 0x00000000
0x14 Interrupt Disable Register IDR Write-only 0x00000000
0x18 Interrupt Mask Register IMR Read-only 0x00000000
0x1C Interrupt Status Register ISR Read-only 0x00000000
0x20 Interrupt Status Clear Register ICR Write-only 0x00000000
0x24 Test Register TR Read/Write 0x00000000
0x30 Parameter Register PARAMETER Read-only -(1)
0x34 Version Register VERSION Read-only -(1)
0x80 Window0 Configuration Register CONFW0 Read/Write 0x00000000
0x84 Window1 Configuration Register CONFW1 Read/Write 0x00000000
0x88 Window2 Configuration Register CONFW2 Read/Write 0x00000000
0x8C Window3 Configuration Register CONFW3 Read/Write 0x00000000
0xD0 AC0 Configuration Register CONF0 Read/Write 0x00000000
0xD4 AC1 Configuration Register CONF1 Read/Write 0x00000000
0xD8 AC2 Configuration Register CONF2 Read/Write 0x00000000
0xDC AC3 Configuration Register CONF3 Read/Write 0x00000000
0xE0 AC4 Configuration Register CONF4 Read/Write 0x00000000
0xE4 AC5 Configuration Register CONF5 Read/Write 0x00000000
0xE8 AC6 Configuration Register CONF6 Read/Write 0x00000000
0xEC AC7 Configuration Register CONF7 Read/Write 0x00000000
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30.9.1 Control Register
Name: CTRL
Access Type: Read/Write
Offset: 0x00
Reset Value: 0x00000000
• SUT: Startup Time
Analog Comparator startup time = .
Each time an AC is enabled, the AC comparison will be enabled after the startup time of the AC.
• ACTEST: Analog Comparator Test Mode
0: The Analog Comparator outputs feeds the channel logic in ACIFB.
1: The Analog Comparator outputs are bypassed with the AC Test Register.
• ESTART: Peripheral Event Start Single Comparison
Writing a zero to this bit has no effect.
Writing a one to this bit starts a comparison and can be used for test purposes.
This bit is cleared when comparison is done.
This bit is set when an enabled peripheral event is received.
• USTART: User Start Single Comparison
Writing a zero to this bit has no effect.
Writing a one to this bit starts a Single Measurement Mode comparison.
This bit is cleared when comparison is done.
• EVENTEN: Peripheral Event Trigger Enable
0: A peripheral event will not trigger a comparison.
1: Enable comparison triggered by a peripheral event.
• EN: ACIFB Enable
0: The ACIFB is disabled.
1: The ACIFB is enabled.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - - - SUT[9:8]
15 14 13 12 11 10 9 8
SUT[7:0]
76543210
ACTEST - ESTART USTART - - -EVENTEN EN
SUT
FGCLK
----------------
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30.9.2 Status Register
Name: SR
Access Type: Read-only
Offset: 0x04
Reset Value: 0x00000000
• WFCSn: Window Mode Current Status
This bit is cleared when the common input voltage is outside the window.
This bit is set when the common input voltage is inside the window.
• ACRDYn: ACn Ready
This bit is cleared when the AC output (ACOUT) is not ready.
This bit is set when the AC output (ACOUT) is ready, AC is enabled and its startup time is over.
• ACCSn: ACn Current Comparison Status
This bit is cleared when VINP is currently lower than VINN
This bit is set when VINP is currently greater than VINN.
31 30 29 28 27 26 25 24
- - - - WFCS3 WFCS2 WFCS1 WFCS0
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
ACRDY7 ACCS7 ACRDY6 ACCS6 ACRDY5 ACCS5 ACRDY4 ACCS4
76543210
ACRDY3 ACCS3 ACRDY2 ACCS2 ACRDY1 ACCS1 ACRDY0 ACCS0
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30.9.3 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x10
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
- - - - WFINT3 WFINT2 WFINT1 WFINT0
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
SUTINT7 ACINT7 SUTINT6 ACINT6 SUTINT5 ACINT5 SUTINT4 ACINT4
76543210
SUTINT3 ACINT3 SUTINT2 ACINT2 SUTINT1 ACINT1 SUTINT0 ACINT0
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30.9.4 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x14
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
- - - - WFINT3 WFINT2 WFINT1 WFINT0
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
SUTINT7 ACINT7 SUTINT6 ACINT6 SUTINT5 ACINT5 SUTINT4 ACINT4
76543210
SUTINT3 ACINT3 SUTINT2 ACINT2 SUTINT1 ACINT1 SUTINT0 ACINT0
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30.9.5 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x18
Reset Value: 0x00000000
• WFINTn: Window Mode Interrupt Mask
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
This bit is cleared when the corresponding bit in IDR is written to one.
This bit is set when the corresponding bit in IER is written to one.
• SUTINTn: ACn Startup Time Interrupt Mask
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
This bit is cleared when the corresponding bit in IDR is written to one.
This bit is set when the corresponding bit in IER is written to one.
• ACINTn: ACn Interrupt Mask
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
This bit is cleared when the corresponding bit in IDR is written to one.
This bit is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
- - - - WFINT3 WFINT2 WFINT1 WFINT0
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
SUTINT7 ACINT7 SUTINT6 ACINT6 SUTINT5 ACINT5 SUTINT4 ACINT4
76543210
SUTINT3 ACINT3 SUTINT2 ACINT2 SUTINT1 ACINT1 SUTINT0 ACINT0
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30.9.6 Interrupt Status Register
Name: ISR
Access Type: Read-only
Offset: 0x1C
Reset Value: 0x00000000
• WFINTn: Window Mode Interrupt Status
0: No Window Mode Interrupt is pending.
1: Window Mode Interrupt is pending.
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the corresponding channel pair operating in window mode generated an interrupt.
• SUTINTn: ACn Startup Time Interrupt Status
0: No Startup Time Interrupt is pending.
1: Startup Time Interrupt is pending.
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the startup time of the corresponding AC has passed.
• ACINTn: ACn Interrupt Status
0: No Normal Mode Interrupt is pending.
1: Normal Mode Interrupt is pending.
This bit is cleared when the corresponding bit in ICR is written to one.
This bit is set when the corresponding channel generated an interrupt.
31 30 29 28 27 26 25 24
- - - - WFINT3 WFINT2 WFINT1 WFINT0
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
SUTINT7 ACINT7 SUTINT6 ACINT6 SUTINT5 ACINT5 SUTINT4 ACINT4
76543210
SUTINT3 ACINT3 SUTINT2 ACINT2 SUTINT1 ACINT1 SUTINT0 ACINT0
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30.9.7 Interrupt Status Clear Register
Name: ICR
Access Type: Write-only
Offset: 0x20
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in ISR and the corresponding interrupt request.
31 30 29 28 27 26 25 24
- - - - WFINT3 WFINT2 WFINT1 WFINT0
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
SUTINT7 ACINT7 SUTINT6 ACINT6 SUTINT5 ACINT5 SUTINT4 ACINT4
76543210
SUTINT3 ACINT3 SUTINT2 ACINT2 SUTINT1 ACINT1 SUTINT0 ACINT0
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30.9.8 Test Register
Name: TR
Access Type: Read/Write
Offset: 0x24
Reset Value: 0x00000000
• ACTESTn: AC Output Override Value
If CTRL.ACTEST is set, the ACn output is overridden with the value of ACTESTn.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
ACTEST7 ACTEST6 ACTEST5 ACTEST4 ACTEST3 ACTEST2 ACTEST1 ACTEST0
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30.9.9 Parameter Register
Name: PARAMETER
Access Type: Read-only
Offset: 0x30
Reset Value: -
• WIMPLn: Window Pair n Implemented
0: Window Pair not implemented.
1: Window Pair implemented.
• ACIMPLn: Analog Comparator n Implemented
0: Analog Comparator not implemented.
1: Analog Comparator implemented.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - WIMPL3 WIMPL2 WIMPL1 WIMPL0
15 14 13 12 11 10 9 8
--------
76543210
ACIMPL7 ACIMPL6 ACIMPL5 ACIMPL4 ACIMPL3 ACIMPL2 ACIMPL1 ACIMPL0
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30.9.10 Version Register
Name: VERSION
Access Type: Read-only
Offset: 0x34
Reset Value: -
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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30.9.11 Window Configuration Register
Name: CONFWn
Access Type: Read/Write
Offset: 0x80,0x84,0x88,0x8C
Reset Value: 0x00000000
• WFEN: Window Mode Enable
0: The window mode is disabled.
1: The window mode is enabled.
• WEVEN: Window Event Enable
0: Event from awout is disabled.
1: Event from awout is enabled.
• WEVSRC: Event Source Selection for Window Mode
000: Event on acwout rising edge.
001: Event on acwout falling edge.
010: Event on awout rising or falling edge.
011: Inside window.
100: Outside window.
101: Measure done.
110-111: Reserved.
• WIS: Window Mode Interrupt Settings
00: Window interrupt as soon as the input voltage is inside the window.
01: Window interrupt as soon as the input voltage is outside the window.
10: Window interrupt on toggle of window compare output.
11: Window interrupt when evaluation of input voltage is done.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - - - - WFEN
15 14 13 12 11 10 9 8
- - - - WEVEN WEVSRC
7654321 0
- - - - - - WIS
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30.9.12 AC Configuration Register
Name: CONFn
Access Type: Read/Write
Offset: 0xD0,0xD4,0xD8,0xDC,0xE0,0xE4,0xE8,0xEC
Reset Value: 0x00000000
• FLEN: Filter Length
000: Filter off.
n: Number of samples to be averaged =2n
.
• HYS: Hysteresis Value
0000: No hysteresis.
1111: Max hysteresis.
• EVENN: Event Enable Negative
0: Do not output event when ACOUT is zero.
1: Output event when ACOUT is zero.
• EVENP: Event Enable Positive
0: Do not output event when ACOUT is one.
1: Output event when ACOUT is one.
• INSELP: Positive Input Select
00: ACPn pin selected.
01: Reserved.
10: Reserved.
11: Reserved.
• INSELN: Negative Input Select
00: ACNn pin selected.
01: ACREFN pin selected.
10: Reserved.
11: Reserved.
• MODE: Mode
00: Off.
01: Continuous Measurement Mode.
10: User Triggered Single Measurement Mode.
11: Event Triggered Single Measurement Mode.
31 30 29 28 27 26 25 24
- FLEN HYS
23 22 21 20 19 18 17 16
- - - - - - EVENP EVENN
15 14 13 12 11 10 9 8
- - - - INSELP INSELN
7654321 0
- - MODE - - IS
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• IS: Interrupt Settings
00: Comparator interrupt when as VINP > VINN.
01: Comparator interrupt when as VINP < VINN.
10: Comparator interrupt on toggle of Analog Comparator output.
11: Comparator interrupt when comparison of VINP and VINN is done.
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30.10 Module Configuration
The specific configuration for each ACIFB instance is listed in the following tables.The module
bus clocks listed here are connected to the system bus clocks. Refer to the Power Manager
chapter for details.
Table 30-5. ACIFB Configuration
Feature ACIFB
Number of channels 8
Table 30-6. ACIFB Clocks
Clock Name Description
CLK_ACIFB Clock for the ACIFB bus interface
GCLK The generic clock used for the ACIFB is GCLK4
Table 30-7. Register Reset Values
Register Reset Value
VERSION 0x00000202
PARAMETER 0x000F00FF
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31. Capacitive Touch Module (CAT)
Rev: 4.0.0.0
31.1 Features
• QTouch® method allows N touch sensors to be implemented using 2N physical pins
• QMatrix method allows X by Y matrix of sensors to be implemented using (X+2Y) physical pins
• One autonomous QTouch sensor operates without DMA or CPU intervention
• All QTouch sensors can operate in DMA-driven mode without CPU intervention
• External synchronization to reduce 50 or 60 Hz mains interference
• Spread spectrum sensor drive capability
31.2 Overview
The Capacitive Touch Module (CAT) senses touch on external capacitive touch sensors. Capacitive
touch sensors use no external mechanical components, and therefore demand less
maintenance in the user application.
The module implements the QTouch method of capturing signals from capacitive touch sensors.
The QTouch method is generally suitable for small numbers of sensors since it requires 2 physical
pins per sensor. The module also implements the QMatrix method, which is more
appropriate for large numbers of sensors since it allows an X by Y matrix of sensors to be implemented
using only (X+2Y) physical pins. The module allows methods to function together, so N
touch sensors and an X by Y matrix of sensors can be implemented using (2N+X+2Y) physical
pins.
In addition, the module allows sensors using the QTouch method to be divided into two groups.
Each QTouch group can be configured with different properties. This eases the implementation
of multiple kinds of controls such as push buttons, wheels, and sliders.
All of the QTouch sensors can operate in a DMA-driven mode, known as DMATouch, that allows
detection of touch without CPU intervention. The module also implements one autonomous
QTouch sensor that is capable of detecting touch without DMA or CPU intervention. This allows
proximity or activation detection in low-power sleep modes.
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31.3 Block Diagram
Figure 31-1. CAT Block Diagram
31.4 I/O Lines Description
Interface
Registers Peripheral Bus
Finite State
Machine Capacitor
Charge and
Discharge
Sequence
Generator
Counters
CSAn
SMP
I/O
Controller Pins
Discharge
Current
Sources
DIS
Yn
Analog
Comparators
Peripheral
Event System
CLK_CAT
Analog
Comparator
Interface
SYNC
Capacitive Touch Module (CAT)
CSBn
GCLK_CAT VDIVEN
NOTE:
Italicized
signals and
blocks are
used only for
QMatrix
operation
Table 31-1. I/O Lines Description
Name Description Type
CSAn Capacitive sense A line n I/O
CSBn Capacitive sense B line n I/O
DIS Discharge current control (only used for QMatrix) Analog
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31.5 Product Dependencies
In order to use the CAT module, other parts of the system must be configured correctly, as
described below.
31.5.1 I/O Lines
The CAT pins may be multiplexed with other peripherals. The user must first program the I/O
Controller to give control of the pins to the CAT module. In QMatrix mode, the Y lines must be
driven by the CAT and analog comparators sense the voltage on the Y lines. Thus, the CAT (not
the Analog Comparator Interface) must be the selected function for the Y lines in the I/O
Controller.
By writing ones and zeros to bits in the Pin Mode Registers (PINMODEx), most of the CAT pins
can be individually selected to implement the QTouch method or the QMatrix method. Each pin
has a different name and function depending on whether it is implementing the QTouch method
or the QMatrix method. The following table shows the pin names for each method and the bits in
the PINMODEx registers which control the selection of the QTouch or QMatrix method.
SMP SMP line (only used for QMatrix) Output
SYNC Synchronize signal Input
VDIVEN Voltage divider enable (only used for QMatrix) Output
Table 31-1. I/O Lines Description
Name Description Type
Table 31-2. Pin Selection Guide
CAT Module Pin
Name
QTouch Method
Pin Name
QMatrix Method Pin
Name
Selection Bit in
PINMODEx Register
CSA0 SNS0 X0 SP0
CSB0 SNSK0 X1 SP0
CSA1 SNS1 Y0 SP1
CSB1 SNSK1 YK0 SP1
CSA2 SNS2 X2 SP2
CSB2 SNSK2 X3 SP2
CSA3 SNS3 Y1 SP3
CSB3 SNSK3 YK1 SP3
CSA4 SNS4 X4 SP4
CSB4 SNSK4 X5 SP4
CSA5 SNS5 Y2 SP5
CSB5 SNSK5 YK2 SP5
CSA6 SNS6 X6 SP6
CSB6 SNSK6 X7 SP6
CSA7 SNS7 Y3 SP7
CSB7 SNSK7 YK3 SP7
CSA8 SNS8 X8 SP8
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31.5.2 Clocks
The clock for the CAT module, CLK_CAT, is generated by the Power Manager (PM). This clock
is turned on by default, and can be enabled and disabled in the PM. The user must ensure that
CLK_CAT is enabled before using the CAT module.
QMatrix operations also require the CAT generic clock, GCLK_CAT. This generic clock is generated
by the System Control Interface (SCIF), and is shared between the CAT and the Analog
Comparator Interface. The user must ensure that the GCLK_CAT is enabled in the SCIF before
using QMatrix functionality in the CAT module. For proper QMatrix operation, the frequency of
GCLK_CAT must be less than half the frequency of CLK_CAT. If only QTouch functionality is
used, then GCLK_CAT is unnecessary.
31.5.3 Interrupts
The CAT interrupt request line is connected to the interrupt controller. Using CAT interrupts
requires the interrupt controller to be programmed first.
31.5.4 Peripheral Events
The CAT peripheral events are connected via the Peripheral Event System. Refer to the Peripheral
Event System chapter for details.
31.5.5 Peripheral Direct Memory Access
The CAT module provides handshake capability for a Peripheral DMA Controller. One handshake
controls transfers from the Acquired Count Register (ACOUNT) to memory. A second
handshake requests burst lengths for each (X,Y) pair to the Matrix Burst Length Register
CSB8 SNSK8 X9 SP8
CSA9 SNS9 Y4 SP9
CSB9 SNSK9 YK4 SP9
CSA10 SNS10 X10 SP10
CSB10 SNSK10 X11 SP10
CSA11 SNS11 Y5 SP11
CSB11 SNSK11 YK5 SP11
CSA12 SNS12 X12 SP12
CSB12 SNSK12 X13 SP12
CSA13 SNS13 Y6 SP13
CSB13 SNSK13 YK6 SP13
CSA14 SNS14 X14 SP14
CSB14 SNSK14 X15 SP14
CSA15 SNS15 Y7 SP15
CSB15 SNSK15 YK7 SP15
CSA16 SNS16 X16 SP16
CSB16 SNSK16 X17 SP16
Table 31-2. Pin Selection Guide
CAT Module Pin
Name
QTouch Method
Pin Name
QMatrix Method Pin
Name
Selection Bit in
PINMODEx Register
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(MBLEN) when using the QMatrix acquisition method. Two additional handshakes support DMATouch
by regulating transfers from memory to the DMATouch State Write Register (DMATSW)
and from the DMATouch State Read Register (DMATSR) to memory. The Peripheral DMA Controller
must be configured properly and enabled in order to perform direct memory access
transfers to/from the CAT module.
31.5.6 Analog Comparators
When the CAT module is performing QMatrix acquisition, it requires that on-chip analog comparators
be used as part of the process. These analog comparators are not controlled directly by
the CAT module, but by a separate Analog Comparator (AC) Interface. This interface must be
configured properly and enabled before the CAT module is used. This includes configuring the
generic clock input for the analog comparators to the proper sampling frequency.
The CAT will automatically use the negative peripheral events from the AC Interface on every Y
pin in QMatrix mode. When QMatrix acquisition is used the analog comparator corresponding to
the selected Y pins must be enabled and converting continuously, using the Y pin as the positive
reference and the ACREFN as negative reference.
31.5.7 Debug Operation
When an external debugger forces the CPU into debug mode, the CAT continues normal operation.
If the CAT is configured in a way that requires it to be periodically serviced by the CPU
through interrupts or similar, improper operation or data loss may result during debugging.
31.6 Functional Description
31.6.1 Acquisition Types
The CAT module can perform several types of QTouch acquisition from capacitive touch sensors:
autonomous QTouch (one sensor only), DMATouch, QTouch group A, and QTouch group
B. The CAT module can also perform QMatrix acquisition. Each type of acquisition has an associated
set of pin selection and configuration registers that allow a large degree of flexibility.
The following schematic diagrams show typical hardware connections for QTouch and QMatrix
sensors, respectively:
Figure 31-2. CAT Touch Connections
AVR32 Chip
QTouch
Sensor
Cs (Sense Capacitor)
SNSKn
SNSn
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Figure 31-3. CAT Matrix Connections
In order to use the autonomous QTouch detection capability, the user must first set up the
Autonomous Touch Pin Select Register (ATPINS) and Autonomous/DMA Touch Configuration
Registers (ATCFG0 through 3) with appropriate values. The module can then be enabled using
the Control Register (CTRL). After the module is enabled, the module will acquire data from the
autonomous QTouch sensor and use it to determine whether the sensor is activated. The
active/inactive status of the autonomous QTouch sensor is reported in the Status Register (SR),
and it is also possible to configure the CAT to generate an interrupt whenever the status
changes. The module will continue acquiring autonomous QTouch sensor data and updating
autonomous QTouch status until the module is disabled or reset.
In order to use the DMATouch capability, it is first necessary to set up the pin mode registers
(PINMODE0, PINMODE1, and PINMODE2) so that the desired pins are specified as DMATouch.
The Autonomous/DMA Touch Configuration Registers (ATCFG0 through 3) must also be
configured with appropriate values. One channel of the Peripheral DMA Controller must be set
up to transfer state words from a block of memory to the DMATSW register, and another channel
must be set up to transfer state words from the DMATSR register back to the same block of
memory. The module can then be enabled using the CTRL register. After the module is enabled,
the module will acquire count values from each DMATouch sensor. Once the module has
acquired a count value for a sensor, it will use a handshake interface to signal the Peripheral
DMA controller to transfer a state word to the DMATSW register. The module will use the count
value to update the state word, and then the updated state word will be transferred to the
DMATSR register. Another handshake interface will signal the Peripheral DMA controller to
transfer the contents of the DMATSR register back to memory. The status of the DMATouch
sensors can be determined at any time by reading the DMATouch Sensor Status Register
(DMATSS).
AVR32 Chip
Cs0 (Sense Capacitor)
X3
YK0
X6 QMatrix Sensor Array
X7
X2
Y0
YK1
Y1 Cs1 (Sense Capacitor)
SMP
Rsmp1 Rsmp0
VDIVEN
DIS
Rdis
ACREFN
Ra
Rb
NOTE: If the CAT internal
current sources will be enabled,
the SMP signal and Rsmp
resistors should NOT be included
in the design. If the CAT internal
current sources will NOT be
enabled, the DIS signal and Rdis
resistor should NOT be included
in the design.
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In order to use the QMatrix, QTouch group A, or QTouch group B acquisition capabilities, it is
first necessary to set up the pin mode registers (PINMODE0, PINMODE1, and PINMODE2) and
configuration registers (MGCFG0, MGCFG1, TGACFG0, TGACFG1, TGBCFG0, and
TGBCFG1). The module must then be enabled using the CTRL register. In order to initiate
acquisition, it is necessary to perform a write to the Acquisition Initiation and Selection Register
(AISR). The specific value written to AISR determines which type of acquisition will be performed:
QMatrix, QTouch group A, or QTouch group B. The CPU can initiate acquisition by
writing to the AISR.
While QMatrix, QTouch group A, or QTouch group B acquisition is in progress, the module collects
count values from the sensors and buffers them. Availability of acquired count data is
indicated by the Acquisition Ready (ACREADY) bit in the Status Register (SR). The CPU or the
Peripheral DMA Controller can then read the acquired counts from the ACOUNT register.
Because the CAT module is configured with Peripheral DMA Controller capability that can transfer
data from memory to MBLEN and from ACOUNT to memory, the Peripheral DMA Controller
can perform long acquisition sequences and store results in memory without CPU intervention.
31.6.2 Prescaler and Charge Length
Each QTouch acquisition type (autonomous QTouch, QTouch group A, and QTouch group B)
has its own prescaler. Each QTouch prescaler divides down the CLK_CAT clock to an appropriate
sampling frequency for its particular acquisition type. Typical frequencies are 1MHz for
QTouch acquisition and 4MHz for QMatrix burst timing control.
Each QTouch prescaler is controlled by the DIV field in the appropriate Configuration Register 0
(ATCFG0, TGACFG0, or TGBCFG0). The QMatrix burst timing prescaler is controlled by the
DIV field in MGCFG0. Each prescaler uses the following formula to generate the sampling clock:
Sampling clock = CLK_CAT / (2(DIV+1))
The capacitive sensor charge length, discharge length, and settle length can be determined for
each acquisition type using the CHLEN, DILEN, and SELEN fields in Configuration Registers 0
and 1. The lengths are specified in terms of prescaler clocks. In addition, the QMatrix Cx discharge
length can be determined using the CXDILEN field in MGCFG2.
For QMatrix acquisition, the duration of CHLEN should not be set to the same value as the
period of any periodic signal on any other pin. If the duration of CHLEN is the same as the
period of a signal on another pin, it is likely that the other signal will significantly affect measurements
due to stray capacitive coupling. For example, if a 1 MHz signal is generated on another
pin of the chip, then CHLEN should not be 1 microsecond.
For the QMatrix method, burst and capture lengths are set for each (X,Y) pair by writing the
desired length values to the MBLEN register. The write must be done before each X line can
start its acquisition and is indicated by the status bit MBLREQ in the Status Register (SR). A
DMA handshake interface is also connected to this status bit to reduce CPU overhead during
QMatrix acquisitions.
Four burst lengths (BURST0..3) can be written at one time into the MBLEN register. If the current
configuration uses Y lines larger than Y3 the register has to be written a second time. The
first write to MBLEN specifies the burst length for Y lines 0 to 3 in the BURST0 to BURST3 fields,
respectively. The second write specifies the burst length for Y lines 4 to 7 in fields BURST0 to
BURST3, respectively, and so on.
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The Y and YK pins remain clamped to ground apart from the specified number of burst pulses,
when charge is transferred and captured into the sampling capacitor.
31.6.3 Capacitive Count Acquisition
For the QMatrix, QTouch group A, and QTouch group B types of acquisition, the module
acquires count values from the sensors, buffers them, and makes them available for reading in
the ACOUNT register. Further processing of the count values must be performed by the CPU.
When the module performs QMatrix acquisition using multiple Y lines, it starts the capture for
each Y line at the appropriate time in the burst sequence so that all captures finish simultaneously.
For example, suppose that an acquisition is performed on Y0 and Y1 with BURST0=53
and BURST1=60. The module will first toggle the X line 7 times while capturing on Y1 while Y0
and YK0 are clamped to ground. The module will then toggle the X line 53 times while capturing
on both Y1 and Y0.
31.6.4 Autonomous QTouch and DMATouch
For autonomous QTouch and DMATouch, a complete detection algorithm is implemented within
the CAT module. The additional parameters needed to control the detection algorithm must be
specified by the user in the ATCFG2 and ATCFG3 registers.
Autonomous QTouch and DMATouch sensitivity and out-of-touch sensitivity can be adjusted
with the SENSE and OUTSENS fields, respectively, in ATCFG2. Each field accepts values from
one to 255 where 255 is the least sensitive setting. The value in the OUTSENS field should be
smaller than the value in the SENSE field.
To avoid false positives a detect integration filtering technique can be used. The number of successive
detects required is specified in the FILTER field of the ATCFG2 register.
To compensate for changes in capacitance the CAT can recalibrate the autonomous QTouch
sensor periodically. The timing of this calibration is done with the NDRIFT and PDRIFT fields in
the Configuration register, ATCFG3. It is recommended that the PDRIFT value is smaller than
the NDRIFT value.
The autonomous QTouch sensor and DMATouch sensors will also recalibrate if the count value
goes too far positive beyond a threshold. This positive recalibration threshold is specified by the
PTHR field in the ATCFG3 register.
The following block diagram shows the sequence of acquisition and processing operations used
by the CAT module. The AISR written bit is internal and not visible in the user interface.
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Figure 31-4. CAT Acquisition and Processing Sequence
31.6.5 Spread Spectrum Sensor Drive
To reduce electromagnetic compatibility issues, the capacitive sensors can be driven with a
spread spectrum signal. To enable spread spectrum drive for a specific acquisition type, the
user must write a one to the SPREAD bit in the appropriate Configuration Register 1 (MGCFG1,
ATCFG1, TGACFG1, or TGBCFG1).
During spread spectrum operation, the length of each pulse within a burst is varied in a deterministic
pattern, so that the exact same burst pattern is used for a specific burst length. The
maximum spread is determined by the MAXDEV field in the Spread Spectrum Configuration
Register (SSCFG) register. The prescaler divisor is varied in a sawtooth pattern from
(2(DIV+1))-MAXDEV to (2(DIV+1))+MAXDEV and then back to (2(DIV+1))-MAXDEV. For example,
if DIV is 2 and MAXDEV is 3, the prescaler divisor will have the following sequence: 6, 7, 8,
Idle
Acquire
autonomous
touch count
Acquire counts
Update
autonomous
touch detection
algorithm
Wait for all
acquired counts
to be transferred
AISR written flag set?
No Yes
Clear AISR
written flag
No Yes
Autonomous touch
enabled (ATEN)?
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9, 3, 4, 5, 6, 7, 8, 9, 3, 4, etc. MAXDEV must not exceed the value of (2(DIV+1)), or undefined
behavior will occur.
31.6.6 Synchronization
To prevent interference from the 50 or 60 Hz mains line the CAT can trigger acquisition on the
SYNC signal. The SYNC signal should be derived from the mains line. The acquisition will trigger
on a falling edge of this signal. To enable synchronization for a specific acquisition type, the
user must write a one to the SYNC bit in the appropriate Configuration Register 1 (MGCFG1,
ATCFG1, TGACFG1, or TGBCFG1).
For QMatrix acquisition, all X lines must be sampled at a specific phase of the noise signal for
the synchronization to be effective. This can be accomplished by the synchronization timer,
which is enabled by writing a non-zero value to the SYNCTIM field in the MGCFG2 register. This
ensures that the start of the acquisition of each X line is spaced at regular intervals, defined by
the SYNCTIM field.
31.6.7 Resistive Drive
By default, the CAT pins are driven with normal I/O drive properties. Some of the CSA and CSB
pins can optionally drive with a 1k output resistance for improved EMC. The pins that have this
capability are listed in the Module Configuration section.
31.6.8 Discharge Current Sources
The device integrates discharge current sources, which can be used to discharge the sampling
capacitors during the QMatrix measurement phase. The discharge current sources are enabled
by writing the GLEN bit in the Discharge Current Source (DICS) register to one. This enables an
internal reference voltage, which can be either the internal 1.1V band gap voltage or VDDIO/3,
as selected by the INTVREFSEL bit in the DICS register. If the DICS.INTREFSEL bit is one, the
reference voltage is applied across an internal resistor, Rint. Otherwise, the voltage is applied to
the DIS pin, and an external reference resistor must be connected between DIS and ground.
The nominal discharge current is given by the following formula, where Vref is the reference voltage,
Rref is the value of the reference resistor, trim is the value written to the DICS.TRIM field,
and k is a constant of proportionality:
I = (Vref/Rref)*(1+(k*trim))
The values for the internal reference resistor, Rint, and the constant, k, may be found in the Electrical
Characteristics section. The nominal discharge current may be programmed between 2
and 20 µA. The reference current can be fine-tuned by adjusting the trim value in the DICS.TRIM
field.
The reference current is mirrored to each Y-pin if the corresponding bit is written to one in the
DICS.SOURCES field.
31.6.9 Voltage Divider Enable (VDIVEN) Capability
In many QMatrix applications, the sense capacitors will be charged to 50 mV or more and the
negative reference pin (ACREFN) of the analog comparators can be tied directly to ground. In
that case, the relatively small input offset voltage of the comparators will not cause acquisition
problems. However, in certain specialized QMatrix applications such as interpolated touch
screens, it may be desirable for the sense capacitors to be charged to less than 25 mV. When
such small voltages are used on the sense capacitors, the input offset voltage of the comparators
becomes an issue and can cause QMatrix acquisition problems.
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Problems with QMatrix acquisition of small sense capacitor voltages can be solved by connecting
the negative reference pin (ACREFN) to a voltage divider that produces a small positive
voltage (20 mV, typically) to cancel any negative input offset voltage. With a 3.3V supply, recommended
values for the voltage divider are Ra (resistor from positive supply to ACREFN) of 8200
ohm and Rb (resistor from ACREFN to ground) of 50 ohm. These recommended values will produce
20 mV on the ACREFN pin, which should generally be enough to compensate for the
worst-case negative input offset of the analog comparators.
Unfortunately, such a voltage divider constantly draws a small current from the power supply,
reducing battery life in portable applications. In order to prevent this constant power drain, the
CAT module provides a voltage divider enable pin (VDIVEN) that can be used for driving the
voltage divider. The VDIVEN pin provides power to the voltage divider only when the comparators
are actually performing QMatrix comparisons. When the comparators are inactive, the
VDIVEN output is zero. This minimizes the power consumed by the voltage divider.
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31.7 User Interface
Table 31-3. CAT Register Memory Map
Offset Register Register Name Access Reset
0x00 Control Register CTRL Read/Write 0x00000000
0x04 Autonomous Touch Pin Selection Register ATPINS Read/Write 0x00000000
0x08 Pin Mode Register 0 PINMODE0 Read/Write 0x00000000
0x0C Pin Mode Register 1 PINMODE1 Read/Write 0x00000000
0x10 Autonomous/DMA Touch Configuration Register 0 ATCFG0 Read/Write 0x00000000
0x14 Autonomous/DMA Touch Configuration Register 1 ATCFG1 Read/Write 0x00000000
0x18 Autonomous/DMA Touch Configuration Register 2 ATCFG2 Read/Write 0x00000000
0x1C Autonomous/DMA Touch Configuration Register 3 ATCFG3 Read/Write 0x00000000
0x20 Touch Group A Configuration Register 0 TGACFG0 Read/Write 0x00000000
0x24 Touch Group A Configuration Register 1 TGACFG1 Read/Write 0x00000000
0x28 Touch Group B Configuration Register 0 TGBCFG0 Read/Write 0x00000000
0x2C Touch Group B Configuration Register 1 TGBCFG1 Read/Write 0x00000000
0x30 Matrix Group Configuration Register 0 MGCFG0 Read/Write 0x00000000
0x34 Matrix Group Configuration Register 1 MGCFG1 Read/Write 0x00000000
0x38 Matrix Group Configuration Register 2 MGCFG2 Read/Write 0x00000000
0x3C Status Register SR Read-only 0x00000000
0x40 Status Clear Register SCR Write-only -
0x44 Interrupt Enable Register IER Write-only -
0x48 Interrupt Disable Register IDR Write-only -
0x4C Interrupt Mask Register IMR Read-only 0x00000000
0x50 Acquisition Initiation and Selection Register AISR Read/Write 0x00000000
0x54 Acquired Count Register ACOUNT Read-only 0x00000000
0x58 Matrix Burst Length Register MBLEN Write-only -
0x5C Discharge Current Source Register DICS Read/Write 0x00000000
0x60 Spread Spectrum Configuration Register SSCFG Read/Write 0x00000000
0x64 CSA Resistor Control Register CSARES Read/Write 0x00000000
0x68 CSB Resistor Control Register CSBRES Read/Write 0x00000000
0x6C Autonomous Touch Base Count Register ATBASE Read-only 0x00000000
0x70 Autonomous Touch Current Count Register ATCURR Read-only 0x00000000
0x74 Pin Mode Register 2 PINMODE2 Read/Write 0x00000000
0x78 DMATouch State Write Register DMATSW Write-only 0x00000000
0x7C DMATouch State Read Register DMATSR Read-only 0x00000000
0x80 Analog Comparator Shift Offset Register 0 ACSHI0 Read/Write 0x00000000
0x84 Analog Comparator Shift Offset Register 1 ACSHI1 Read/Write 0x00000000
0x88 Analog Comparator Shift Offset Register 2 ACSHI2 Read/Write 0x00000000
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0x8C Analog Comparator Shift Offset Register 3 ACSHI3 Read/Write 0x00000000
0x90 Analog Comparator Shift Offset Register 4 ACSHI4 Read/Write 0x00000000
0x94 Analog Comparator Shift Offset Register 5 ACSHI5 Read/Write 0x00000000
0x98 Analog Comparator Shift Offset Register 6 ACSHI6 Read/Write 0x00000000
0x9C Analog Comparator Shift Offset Register 7 ACSHI7 Read/Write 0x00000000
0xA0 DMATouch Sensor Status Register DMATSS Read-only 0x00000000
0xF8 Parameter Register PARAMETER Read-only -(1)
0xFC Version Register VERSION Read-only -(1)
Table 31-3. CAT Register Memory Map
Offset Register Register Name Access Reset
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31.7.1 Control Register
Name: CTRL
Access Type: Read/Write
Offset: 0x00
Reset Value: 0x00000000
• SWRST: Software reset
Writing a zero to this bit has no effect.
Writing a one to this bit resets the module. The module will be disabled after the reset.
This bit always reads as zero.
• EN: Module enable
0: Module is disabled.
1: Module is enabled.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
SWRST - - - - - - EN
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31.7.2 Autonomous Touch Pin Selection Register
Name: ATPINS
Access Type: Read/Write
Offset: 0x04
Reset Value: 0x00000000
• ATEN: Autonomous Touch Enable
0: Autonomous QTouch acquisition and detection is disabled.
1: Autonomous QTouch acquisition and detection is enabled using the sense pair specified in ATSP.
• ATSP: Autonomous Touch Sense Pair
Selects the sense pair that will be used by the autonomous QTouch sensor. A value of n will select sense pair n (CSAn and
CSBn pins).
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - - - - ATEN
76543210
- - - ATSP
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31.7.3 Pin Mode Registers 0, 1, and 2
Name: PINMODE0, PINMODE1, and PINMODE2
Access Type: Read/Write
Offset: 0x08, 0x0C, 0x74
Reset Value: 0x00000000
• SP: Sense Pair Mode Selection
Each SP[n] bit determines the operation mode of sense pair n (CSAn and CSBn pins). The (PINMODE2.SP[n]
PINMODE1.SP[n] PINMODE0.SP[n]) bits have the following definitions:
000: Sense pair n disabled.
001: Sense pair n is assigned to QTouch Group A.
010: Sense pair n is assigned to QTouch Group B.
011: Sense pair n is assigned to the QMatrix Group.
100: Sense pair n is assigned to the DMATouch Group.
101: Reserved.
110: Reserved.
111: Reserved.
31 30 29 28 27 26 25 24
-
23 22 21 20 19 18 17 16
- SP[16]
15 14 13 12 11 10 9 8
SP[15:8]
76543210
SP[7:0]
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31.7.4 Autonomous/DMA Touch Configuration Register 0
Name: ATCFG0
Access Type: Read/Write
Offset: 0x10
Reset Value: 0x00000000
• DIV: Clock Divider
The prescaler is used to ensure that the CLK_CAT clock is divided to around 1 MHz to produce the sampling clock.The
prescaler uses the following formula to generate the sampling clock:
Sampling clock = CLK_CAT / (2(DIV+1))
• CHLEN: Charge Length
For the autonomous QTouch sensor and DMATouch sensors, specifies how many sample clock cycles should be used for
transferring charge to the sense capacitor.
• SELEN: Settle Length
For the autonomous QTouch sensor and DMATouch sensors, specifies how many sample clock cycles should be used for
settling after charge transfer.
31 30 29 28 27 26 25 24
DIV[15:8]
23 22 21 20 19 18 17 16
DIV[7:0]
15 14 13 12 11 10 9 8
CHLEN
76543210
SELEN
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31.7.5 Autonomous/DMA Touch Configuration Register 1
Name: ATCFG1
Access Type: Read/Write
Offset: 0x14
Reset Value: 0x00000000
• DISHIFT: Discharge Shift
For the autonomous QTouch sensor and DMATouch sensors, specifies how many bits the DILEN field should be shifted before
using it to determine the discharge time.
• SYNC: Sync Pin
For the autonomous QTouch sensor and DMATouch sensors, specifies that acquisition shall begin when a falling edge is
received on the SYNC line.
• SPREAD: Spread Spectrum Sensor Drive
For the autonomous QTouch sensor and DMATouch sensors, specifies that spread spectrum sensor drive shall be used.
• DILEN: Discharge Length
For the autonomous QTouch sensor and DMATouch sensors, specifies how many sample clock cycles the CAT should use to
discharge the capacitors before charging them.
• MAX: Maximum Count
For the autonomous QTouch sensor and DMATouch sensors, specifies how many counts the maximum acquisition should be.
31 30 29 28 27 26 25 24
- DISHIFT - SYNC SPREAD
23 22 21 20 19 18 17 16
DILEN
15 14 13 12 11 10 9 8
MAX[15:8]
76543210
MAX[7:0]
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31.7.6 Autonomous/DMA Touch Configuration Register 2
Name: ATCFG2
Access Type: Read/Write
Offset: 0x18
Reset Value: 0x00000000
• FILTER: Autonomous Touch Filter Setting
For the autonomous QTouch sensor and DMATouch sensors, specifies how many positive detects in a row the CAT needs to
have on the sensor before reporting it as a touch. A FILTER value of 0 is not allowed and will result in undefined behavior.
• OUTSENS: Out-of-Touch Sensitivity
For the autonomous QTouch sensor and DMATouch sensors, specifies how sensitive the out-of-touch detector should be.
• SENSE: Sensitivity
For the autonomous QTouch sensor and DMATouch sensors, specifies how sensitive the touch detector should be.
31 30 29 28 27 26 25 24
-
23 22 21 20 19 18 17 16
- FILTER
15 14 13 12 11 10 9 8
OUTSENS
76543210
SENSE
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31.7.7 Autonomous/DMA Touch Configuration Register 3
Name: ATCFG3
Access Type: Read/Write
Offset: 0x1C
Reset Value: 0x00000000
• PTHR: Positive Recalibration Threshold
For the autonomous QTouch sensor and DMATouch sensors, specifies how far a sensor’s signal must move in a positive
direction from the reference in order to cause a recalibration.
• PDRIFT: Positive Drift Compensation
For the autonomous QTouch sensor and DMATouch sensors, specifies how often a positive drift compensation should be
performed. When this field is zero, positive drift compensation will never be performed. When this field is non-zero, the positive
drift compensation time interval is given by the following formula:
Tpdrift = PDRIFT * 65536 * (sample clock period)
• NDRIFT: Negative Drift Compensation
For the autonomous QTouch sensor and DMATouch sensors, specifies how often a negative drift compensation should be
performed. When this field is zero, negative drift compensation will never be performed. When this field is non-zero, the negative
drift compensation time interval is given by the following formula:
Tndrift = NDRIFT * 65536 * (sample clock period)
With the typical sample clock frequency of 1 MHz, PDRIFT and NDRIFT can be set from 0.066 seconds to 16.7 seconds
with 0.066 second resolution.
31 30 29 28 27 26 25 24
-
23 22 21 20 19 18 17 16
PTHR
15 14 13 12 11 10 9 8
PDRIFT
76543210
NDRIFT
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31.7.8 Touch Group x Configuration Register 0
Name: TGxCFG0
Access Type: Read/Write
Offset: 0x20, 0x28
Reset Value: 0x00000000
• DIV: Clock Divider
The prescaler is used to ensure that the CLK_CAT clock is divided to around 1 MHz to produce the sampling clock.The
prescaler uses the following formula to generate the sampling clock:
Sampling clock = CLK_CAT / (2(DIV+1))
• CHLEN: Charge Length
For the QTouch method, specifies how many sample clock cycles should be used for transferring charge to the sense capacitor.
• SELEN: Settle Length
For the QTouch method, specifies how many sample clock cycles should be used for settling after charge transfer.
31 30 29 28 27 26 25 24
DIV[15:8]
23 22 21 20 19 18 17 16
DIV[7:0]
15 14 13 12 11 10 9 8
CHLEN
76543210
SELEN
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31.7.9 Touch Group x Configuration Register 1
Name: TGxCFG1
Access Type: Read/Write
Offset: 0x24, 0x2C
Reset Value: 0x00000000
• DISHIFT: Discharge Shift
For the sensors in QTouch group x, specifies how many bits the DILEN field should be shifted before using it to determine the
discharge time.
• SYNC: Sync Pin
For sensors in QTouch group x, specifies that acquisition shall begin when a falling edge is received on the SYNC line.
• SPREAD: Spread Spectrum Sensor Drive
For sensors in QTouch group x, specifies that spread spectrum sensor drive shall be used.
• DILEN: Discharge Length
For sensors in QTouch group x, specifies how many clock cycles the CAT should use to discharge the capacitors before
charging them.
• MAX: Touch Maximum Count
For sensors in QTouch group x, specifies how many counts the maximum acquisition should be.
31 30 29 28 27 26 25 24
- - DISHIFT - - SYNC SPREAD
23 22 21 20 19 18 17 16
DILEN
15 14 13 12 11 10 9 8
MAX[15:8]
76543210
MAX[7:0]
792
32142D–06/2013
ATUC64/128/256L3/4U
31.7.10 Matrix Group Configuration Register 0
Name: MGCFG0
Access Type: Read/Write
Offset: 0x30
Reset Value: 0x00000000
• DIV: Clock Divider
The prescaler is used to ensure that the CLK_CAT clock is divided to around 4 MHz to produce the burst timing clock.The
prescaler uses the following formula to generate the burst timing clock:
Burst timing clock = CLK_CAT / (2(DIV+1))
• CHLEN: Charge Length
For QMatrix sensors, specifies how many burst prescaler clock cycles should be used for transferring charge to the sense
capacitor.
• SELEN: Settle Length
For QMatrix sensors, specifies how many burst prescaler clock cycles should be used for settling after charge transfer.
31 30 29 28 27 26 25 24
DIV[15:8]
23 22 21 20 19 18 17 16
DIV[7:0]
15 14 13 12 11 10 9 8
CHLEN
76543210
SELEN
793
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ATUC64/128/256L3/4U
31.7.11 Matrix Group Configuration Register 1
Name: MGCFG1
Access Type: Read/Write
Offset: 0x34
Reset Value: 0x00000000
• DISHIFT: Discharge Shift
For QMatrix sensors, specifies how many bits the DILEN field should be shifted before using it to determine the discharge time.
• SYNC: Sync Pin
For QMatrix sensors, specifies that acquisition shall begin when a falling edge is received on the SYNC line.
• SPREAD: Spread Spectrum Sensor Drive
For QMatrix sensors, specifies that spread spectrum sensor drive shall be used.
• DILEN: Discharge Length
For QMatrix sensors, specifies how many burst prescaler clock cycles the CAT should use to discharge the capacitors at the
beginning of a burst sequence.
• MAX: Maximum Count
For QMatrix sensors, specifies how many counts the maximum acquisition should be.
31 30 29 28 27 26 25 24
- DISHIFT - SYNC SPREAD
23 22 21 20 19 18 17 16
DILEN
15 14 13 12 11 10 9 8
MAX[15:8]
76543210
MAX[7:0]
794
32142D–06/2013
ATUC64/128/256L3/4U
31.7.12 Matrix Group Configuration Register 2
Name: MGCFG2
Access Type: Read/Write
Offset: 0x38
Reset Value: 0x00000000
• ACCTRL: Analog Comparator Control
When written to one, allows the CAT to disable the analog comparators when they are not needed. When written to zero, the
analog comparators are always enabled.
• CONSEN: Consensus Filter Length
For QMatrix sensors, specifies that discharge will be terminated when CONSEN out of the most recent 5 comparator samples
are positive. For example, a value of 3 in the CONSEN field will terminate discharge when 3 out of the most recent 5 comparator
samples are positive. When CONSEN has the default value of 0, discharge will be terminated immediately when the comparator
output goes positive.
• CXDILEN: Cx Capacitor Discharge Length
For QMatrix sensors, specifies how many burst prescaler clock cycles the CAT should use to discharge the Cx capacitor at the
end of each burst cycle.
• SYNCTIM: Sync Time Interval
When non-zero, determines the number of prescaled clock cycles between the start of the acquisition on each X line for QMatrix
acquisition.
31 30 29 28 27 26 25 24
ACCTRL CONSEN -
23 22 21 20 19 18 17 16
CXDILEN
15 14 13 12 11 10 9 8
- SYNCTIM[11:8]
76543210
SYNCTIM[7:0]
795
32142D–06/2013
ATUC64/128/256L3/4U
31.7.13 Status Register
Name: SR
Access Type: Read-only
Offset: 0x3C
Reset Value: 0x00000000
• DMATSC: DMATouch Sensor State Change
0: No change in the DMATSS register.
1: One or more bits have changed in the DMATSS register.
• DMATSR: DMATouch State Read Register Ready
0: A new state word is not available in the DMATSR register.
1: A new state word is available in the DMATSR register.
• DMATSW: DMATouch State Write Register Request
0: The DMATouch algorithm is not requesting that a state word be written to the DMATSW register.
1: The DMATouch algorithm is requesting that a state word be written to the DMATSW register.
• ACQDONE: Acquisition Done
0: Acquisition is not done (still in progress).
1: Acquisition is complete.
• ACREADY: Acquired Count Data is Ready
0: Acquired count data is not available in the ACOUNT register.
1: Acquired count data is available in the ACOUNT register.
• MBLREQ: Matrix Burst Length Required
0: The QMatrix acquisition does not require any burst lengths.
1: The QMatrix acquisition requires burst lengths for the current X line.
• ATSTATE: Autonomous Touch Sensor State
0: The autonomous QTouch sensor is not active.
1: The autonomous QTouch sensor is active.
• ATSC: Autonomous Touch Sensor Status Interrupt
0: No status change in the autonomous QTouch sensor.
1: Status change in the autonomous QTouch sensor.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
DMATSC - - - - - DMATSR DMATSW
15 14 13 12 11 10 9 8
- - - - - - ACQDONE ACREADY
76543210
- - - MBLREQ ATSTATE ATSC ATCAL ENABLED
796
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ATUC64/128/256L3/4U
• ATCAL: Autonomous Touch Calibration Ongoing
0: The autonomous QTouch sensor is not calibrating.
1: The autonomous QTouch sensor is calibrating.
• ENABLED: Module Enabled
0: The module is disabled.
1: The module is enabled.
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31.7.14 Status Clear Register
Name: SCR
Access Type: Write-only
Offset: 0x40
Reset Value: -
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in SR and the corresponding interrupt request.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
DMATSC - - - - - - -
15 14 13 12 11 10 9 8
- - - - - - ACQDONE ACREADY
76543210
- - - - - ATSC ATCAL -
798
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ATUC64/128/256L3/4U
31.7.15 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x44
Reset Value: -
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
DMATSC - - - - - - -
15 14 13 12 11 10 9 8
- - - - - - ACQDONE ACREADY
76543210
- - - - - ATSC ATCAL -
799
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ATUC64/128/256L3/4U
31.7.16 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x48
Reset Value: -
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
DMATSC - - - - - - -
15 14 13 12 11 10 9 8
- - - - - - ACQDONE ACREADY
76543210
- - - - - ATSC ATCAL -
800
32142D–06/2013
ATUC64/128/256L3/4U
31.7.17 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x4C
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
DMATSC - - - - - - -
15 14 13 12 11 10 9 8
- - - - - - ACQDONE ACREADY
76543210
- - - - - ATSC ATCAL -
801
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ATUC64/128/256L3/4U
31.7.18 Acquisition Initiation and Selection Register
Name: AISR
Access Type: Read/Write
Offset: 0x50
Reset Value: 0x00000000
• ACQSEL: Acquisition Type Selection
A write to this register initiates an acquisition of the following type:
00: QTouch Group A.
01: QTouch Group B.
10: QMatrix Group.
11: Undefined behavior.
A read of this register will return the value that was previously written.
31 30 29 28 27 26 25 24
-
23 22 21 20 19 18 17 16
-
15 14 13 12 11 10 9 8
-
76543210
- ACQSEL
802
32142D–06/2013
ATUC64/128/256L3/4U
31.7.19 Acquired Count Register
Name: ACOUNT
Access Type: Read-only
Offset: 0x54
Reset Value: 0x00000000
• Y: Y index
The Y index (for QMatrix method) associated with this count value.
• SPORX: Sensor pair or X index
The sensor pair index (for QTouch method) or X index (for QMatrix method) associated with this count value.
• COUNT: Count value
The signal (number of counts) acquired on the channel specified in the SPORX and Y fields.
When multiple acquired count values are read from a QTouch acquisition, the Y field will always be 0 and the SPORX value will
increase monotonically. For example, suppose a QTouch acquisition is performed using sensor pairs SP1, SP4, and SP9. The
first count read will have SPORX=1, the second read will have SPORX=4, and the third read will have SPORX=9.
When multiple acquired count values are read from a QMatrix acquisition, the SPORX value will stay the same while Y
increases monotonically through all Y values in the group. Then SPORX will increase to the next X value in the group. For
example, a QMatrix acquisition with X=2,3 and Y=4,7 would provide count values in the following order: X=2 and Y=4, then X=2
and Y=7, then X=3 and Y=4, and finally X=3 and Y=7.
31 30 29 28 27 26 25 24
Y
23 22 21 20 19 18 17 16
SPORX
15 14 13 12 11 10 9 8
COUNT[15:8]
76543210
COUNT[7:0]
803
32142D–06/2013
ATUC64/128/256L3/4U
31.7.20 Matrix Burst Length Register
Name: MBLEN
Access Type: Write-only
Offset: 0x58
Reset Value: -
• BURSTx: Burst Length x
For QMatrix sensors, specifies how many times the switching sequence should be repeated before acquisition begins for each
channel. Each count in the BURSTx field specifies 1 repeat of the switching sequence, so the actual burst length will be BURST.
Before doing a QMatrix acquisition on one X line this register has to be written with the burst values for the current XY pairs. For
each X line this register needs to be programmed with all the Y values. If Y values larger than 3 are used the register has to be
written several times in order to specify all burst lengths.
The Status Register bit MBLREQ is set to 1 when the CAT is waiting for values to be written into this register.
31 30 29 28 27 26 25 24
BURST0
23 22 21 20 19 18 17 16
BURST1
15 14 13 12 11 10 9 8
BURST2
76543210
BURST3
804
32142D–06/2013
ATUC64/128/256L3/4U
31.7.21 Discharge Current Source Register
Name: DICS
Access Type: Read/Write
Offset: 0x5C
Reset Value: 0x00000000
• FSOURCES: Force Discharge Current Sources
When FSOURCES[n] is 0, the corresponding discharge current source behavior depends on SOURCES[n].
When FSOURCES[n] is 1, the corresponding discharge current source is forced to be enabled continuously. This is useful for
testing or debugging but should not be done during normal acquisition.
• GLEN: Global Enable
0: The current source module is globally disabled.
1: The current source module is globally enabled.
• INTVREFSEL: Internal Voltage Reference Select
0: The voltage for the reference resistor is generated from the internal band gap circuit.
1: The voltage for the reference resistor is VDDIO/3.
• INTREFSEL: Internal Reference Select
0: The reference current flows through an external resistor on the DIS pin.
1: The reference current flows through the internal reference resistor.
• TRIM: Reference Current Trimming
This field is used to trim the discharge current. 0x00 corresponds to the minimum current value, and 0x1F corresponds to the
maximum current value.
• SOURCES: Enable Discharge Current Sources
When SOURCES[n] is 0, the corresponding discharge current source is disabled.
When SOURCES[n] is 1, the corresponding discharge current source is enabled at appropriate times during acquisition.
31 30 29 28 27 26 25 24
FSOURCES[7:0]
23 22 21 20 19 18 17 16
GLEN - - - - - INTVREFSEL INTREFSEL
15 14 13 12 11 10 9 8
- - - TRIM
76543210
SOURCES[7:0]
805
32142D–06/2013
ATUC64/128/256L3/4U
31.7.22 Spread Spectrum Configuration Register
Name: SSCFG
Access Type: Read/Write
Offset: 0x60
Reset Value: 0x00000000
• MAXDEV: Maximum Deviation
When spread spectrum burst is enabled, MAXDEV indicates the maximum number of prescaled clock cycles the burst pulse will
be extended or shortened.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
MAXDEV
806
32142D–06/2013
ATUC64/128/256L3/4U
31.7.23 CSA Resistor Control Register
Name: CSARES
Access Type: Read/Write
Offset: 0x64
Reset Value: 0x00000000
• RES: Resistive Drive Enable
When RES[n] is 0, CSA[n] has the same drive properties as normal I/O pads.
When RES[n] is 1, CSA[n] has a nominal output resistance of 1kOhm during the burst phase.
31 30 29 28 27 26 25 24
-
23 22 21 20 19 18 17 16
- RES[16]
15 14 13 12 11 10 9 8
RES[15:8]
76543210
RES[7:0]
807
32142D–06/2013
ATUC64/128/256L3/4U
31.7.24 CSB Resistor Control Register
Name: CSBRES
Access Type: Read/Write
Offset: 0x68
Reset Value: 0x00000000
• RES: Resistive Drive Enable
When RES[n] is 0, CSB[n] has the same drive properties as normal I/O pads.
When RES[n] is 1, CSB[n] has a nominal output resistance of 1kOhm during the burst phase.
31 30 29 28 27 26 25 24
-
23 22 21 20 19 18 17 16
- RES[16]
15 14 13 12 11 10 9 8
RES[15:8]
76543210
RES[7:0]
808
32142D–06/2013
ATUC64/128/256L3/4U
31.7.25 Autonomous Touch Base Count Register
Name: ATBASE
Access Type: Read-only
Offset: 0x6C
Reset Value: 0x00000000
• COUNT: Count value
The base count currently stored by the autonomous touch sensor. This is useful for autonomous touch debugging purposes.
31 30 29 28 27 26 25 24
-
23 22 21 20 19 18 17 16
-
15 14 13 12 11 10 9 8
COUNT[15:8]
76543210
COUNT[7:0]
809
32142D–06/2013
ATUC64/128/256L3/4U
31.7.26 Autonomous Touch Current Count Register
Name: ATCURR
Access Type: Read-only
Offset: 0x70
Reset Value: 0x00000000
• COUNT: Count value
The current count acquired by the autonomous touch sensor. This is useful for autonomous touch debugging purposes.
31 30 29 28 27 26 25 24
-
23 22 21 20 19 18 17 16
-
15 14 13 12 11 10 9 8
COUNT[15:8]
76543210
COUNT[7:0]
810
32142D–06/2013
ATUC64/128/256L3/4U
31.7.27 DMATouch State Write Register
Name: DMATSW
Access Type: Write-only
Offset: 0x78
Reset Value: 0x00000000
• NOTINCAL: Not in Calibration Mode
0: Calibration should be performed on the next iteration of the DMATouch algorithm.
1: Calibration should not be performed on the next iteration of the DMATouch algorithm.
• DETCNT: Detection Count
This count value is updated and used by the DMATouch algorithm in order to detect when a button has been pushed.
• BASECNT: Base Count
This count value represents the average expected acquired count when the sensor/button is not pushed.
31 30 29 28 27 26 25 24
- - - - - - - NOTINCAL
23 22 21 20 19 18 17 16
DETCNT[23:16]
15 14 13 12 11 10 9 8
BASECNT[15:8]
76543210
BASECNT[7:0]
811
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ATUC64/128/256L3/4U
31.7.28 DMA Touch State Read Register
Name: DMATSR
Access Type: Read/Write
Offset: 0x7C
Reset Value: 0x00000000
• NOTINCAL: Not in Calibration Mode
0: Calibration should be performed on the next iteration of the DMATouch algorithm.
1: Calibration should not be performed on the next iteration of the DMATouch algorithm.
• DETCNT: Detection Count
This count value is updated and used by the DMATouch algorithm in order to detect when a button has been pushed.
• BASECNT: Base Count
This count value represents the average expected acquired count when the sensor/button is not pushed.
31 30 29 28 27 26 25 24
- - - - - - - NOTINCAL
23 22 21 20 19 18 17 16
DETCNT[23:16]
15 14 13 12 11 10 9 8
BASECNT[15:8]
76543210
BASECNT[7:0]
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32142D–06/2013
ATUC64/128/256L3/4U
31.7.29 Analog Comparator Shift Offset Register x
Name: ACSHIx
Access Type: Read/Write
Offset: 0x80, 0x84, 0x88, 0x8C, 0x90, 0x94, 0x98, and 0x9C
Reset Value: 0x00000000
• SHIVAL: Shift Offset Value
Specifies the amount to shift the count value from each comparator. This allows the offset of each comparator to be
compensated.
31 30 29 28 27 26 25 24
-
23 22 21 20 19 18 17 16
-
15 14 13 12 11 10 9 8
- SHIVAL[11:8]
76543210
SHIVAL[7:0]
813
32142D–06/2013
ATUC64/128/256L3/4U
31.7.30 DMATouch Sensor Status Register
Name: DMATSS
Access Type: Read-only
Offset: 0xA0
Reset Value: 0x00000000
• SS: Sensor Status
0: The DMATouch sensor is not active, i.e. the button is currently not pushed.
1: The DMATouch sensor is active, i.e. the button is currently pushed.
31 30 29 28 27 26 25 24
SS[31:24]
23 22 21 20 19 18 17 16
SS[23:16]
15 14 13 12 11 10 9 8
SS[15:8]
76543210
SS[7:0]
814
32142D–06/2013
ATUC64/128/256L3/4U
31.7.31 Parameter Register
Name: PARAMETER
Access Type: Read-only
Offset: 0xF8
Reset Value: -
• SP[n]: Sensor pair implemented
0: The corresponding sensor pair is not implemented
1: The corresponding sensor pair is implemented.
31 30 29 28 27 26 25 24
SP[31:24]
23 22 21 20 19 18 17 16
SP[23:16]
15 14 13 12 11 10 9 8
SP[15:8]
76543210
SP[7:0]
815
32142D–06/2013
ATUC64/128/256L3/4U
31.7.32 Version Register
Name: VERSION
Access Type: Read-only
Offset: 0xFC
Reset Value: -
• VARIANT: Variant number
Reserved. No functionality associated.
• VERSION: Version number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
816
32142D–06/2013
ATUC64/128/256L3/4U
31.8 Module Configuration
The specific configuration the CAT module is listed in the following tables.The module bus
clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
31.8.1 Resistive Drive
By default, the CAT pins are driven with normal I/O drive properties. Some of the CSA and CSB
pins can optionally drive with a 1k output resistance for improved EMC.
To enable resistive drive on a pin, the user must write a one to the corresponding bit in the CSA
Resistor Control Register (CSARES) or CSB Resistor Control Register (CSBRES) register.
Table 31-4. CAT Configuration
Feature CAT
Number of touch sensors/Size of matrix Allows up to 17 touch sensors, or up to 16 by 8
matrix sensors to be interfaced.
Table 31-5. CAT Clocks
Clock Name Description
CLK_CAT Clock for the CAT bus interface
GCLK The generic clock used for the CAT is GCLK4
Table 31-6. Register Reset Values
Register Reset Value
VERSION 0x00000400
PARAMETER 0x0001FFFF
817
32142D–06/2013
ATUC64/128/256L3/4U
32. Glue Logic Controller (GLOC)
Rev: 1.0.0.0
32.1 Features
• Glue logic for general purpose PCB design
• Programmable lookup table
• Up to four inputs supported per lookup table
• Optional filtering of output
32.2 Overview
The Glue Logic Controller (GLOC) contains programmable logic which can be connected to the
device pins. This allows the user to eliminate logic gates for simple glue logic functions on the
PCB.
The GLOC consists of a number of lookup table (LUT) units. Each LUT can generate an output
as a user programmable logic expression with four inputs. Inputs can be individually masked.
The output can be combinatorially generated from the inputs, or filtered to remove spikes.
32.3 Block Diagram
Figure 32-1. GLOC Block Diagram PERIPHERAL BUS TRUTH
FILTER
OUT[0]
...
OUT[n]
FILTEN
IN[3:0]
…
IN[(4n+3):4n]
AEN
CLK_GLOC
GCLK
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32.4 I/O Lines Description
Each LUT have 4 inputs and one output. The inputs and outputs for the LUTs are mapped
sequentially to the inputs and outputs. This means that LUT0 is connected to IN0 to IN3 and
OUT0. LUT1 is connected to IN4 to IN7 and OUT1. In general, LUTn is connected to IN[4n] to
IN[4n+3] and OUTn.
32.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
32.5.1 I/O Lines
The pins used for interfacing the GLOC may be multiplexed with I/O Controller lines. The programmer
must first program the I/O Controller to assign the desired GLOC pins to their
peripheral function. If I/O lines of the GLOC are not used by the application, they can be used for
other purposes by the I/O Controller.
It is only required to enable the GLOC inputs and outputs actually in use. Pullups for pins configured
to be used by the GLOC will be disabled.
32.5.2 Clocks
The clock for the GLOC bus interface (CLK_GLOC) is generated by the Power Manager. This
clock is enabled at reset, and can be disabled in the Power Manager. It is recommended to disable
the GLOC before disabling the clock, to avoid freezing the module in an undefined state.
Additionally, the GLOC depends on a dedicated Generic Clock (GCLK). The GCLK can be set to
a wide range of frequencies and clock sources, and must be enabled by the System Control
Interface (SCIF) before the GLOC filter can be used.
32.5.3 Debug Operation
When an external debugger forces the CPU into debug mode, the GLOC continues normal
operation.
32.6 Functional Description
32.6.1 Enabling the Lookup Table Inputs
Since the inputs to each lookup table (LUT) unit can be multiplexed with other peripherals, each
input must be explicitly enabled by writing a one to the corresponding enable bit (AEN) in the
corresponding Control Register (CR).
If no inputs are enabled, the output OUTn will be the least significant bit in the TRUTHn register.
Table 32-1. I/O Lines Description
Pin Name Pin Description Type
IN0-INm Inputs to lookup tables Input
OUT0-OUTn Output from lookup tables Output
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32.6.2 Configuring the Lookup Table
The lookup table in each LUT unit can generate any logic expression OUT as a function of up to
four inputs, IN[3:0]. The truth table for the expression is written to the TRUTH register for the
LUT. Table 32-2 shows the truth table for LUT0. The truth table for LUTn is written to TRUTHn,
and the corresponding input and outputs will be IN[4n] to IN[4n+3] and OUTn.
32.6.3 Output Filter
By default, the output OUTn is a combinatorial function of the inputs IN[4n] to IN[4n+3]. This may
cause some short glitches to occur when the inputs change value.
It is also possible to clock the output through a filter to remove glitches. This requires that the
corresponding generic clock (GCLK) has been enabled before use. The filter can then be
enabled by writing a one to the Filter Enable (FILTEN) bit in CRn. The OUTn output will be
delayed by three to four GCLK cycles when the filter is enabled.
Table 32-2. Truth Table for the Lookup Table in LUT0
IN[3] IN[2] IN[1] IN[0] OUT[0]
0 0 0 0 TRUTH0[0]
0 0 0 1 TRUTH0[1]
0 0 1 0 TRUTH0[2]
0 0 1 1 TRUTH0[3]
0 1 0 0 TRUTH0[4]
0 1 0 1 TRUTH0[5]
0 1 1 0 TRUTH0[6]
0 1 1 1 TRUTH0[7]
1 0 0 0 TRUTH0[8]
1 0 0 1 TRUTH0[9]
1 0 1 0 TRUTH0[10]
1 0 1 1 TRUTH0[11]
1 1 0 0 TRUTH0[12]
1 1 0 1 TRUTH0[13]
1 1 1 0 TRUTH0[14]
1 1 1 1 TRUTH0[15]
820
32142D–06/2013
ATUC64/128/256L3/4U
32.7 User Interface
Note: 1. The reset values are device specific. Please refer to the Module Configuration section at the end of this chapter.
Table 32-3. GLOC Register Memory Map
Offset Register Register Name Access Reset
0x00+n*0x08 Control Register n CRn Read/Write 0x00000000
0x04+n*0x08 Truth Table Register n TRUTHn Read/Write 0x00000000
0x38 Parameter Register PARAMETER Read-only - (1)
0x3C Version Register VERSION Read-only - (1)
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32.7.1 Control Register n
Name: CRn
Access Type: Read/Write
Offset: 0x00+n*0x08
Reset Value: 0x00000000
• FILTEN: Filter Enable
1: The output is glitch filtered
0: The output is not glitch filtered
• AEN: Enable IN Inputs
Input IN[n] is enabled when AEN[n] is one.
Input IN[n] is disabled when AEN[n] is zero, and will not affect the OUT value.
31 30 29 28 27 26 25 24
FILTEN - - - - - - -
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - AEN
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32.7.2 Truth Table Register n
Name: TRUTHn
Access Type: Read/Write
Offset: 0x04+n*0x08
Reset Value: 0x00000000
• TRUTH: Truth Table Value
This value defines the output OUT as a function of inputs IN:
OUT = TRUTH[IN]
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
TRUTH[15:8]
76543210
TRUTH[7:0]
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32.7.3 Parameter Register
Name: PARAMETER
Access Type: Read-only
Offset: 0x38
Reset Value: -
• LUTS: Lookup Table Units Implemented
This field contains the number of lookup table units implemented in this device.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
LUTS
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32.7.4 VERSION Register
Name: VERSION
Access Type: Read-only
Offset: 0x3C
Reset Value: -
• VARIANT: Variant Number
Reserved. No functionality associated.
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
- - - - VARIANT
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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32.8 Module Configuration
The specific configuration for each GLOC instance is listed in the following tables.The GLOC
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 32-4. GLOC Configuration
Feature GLOC
Number of LUT units 2
Table 32-5. GLOC Clocks
Clock Name Description
CLK_GLOC Clock for the GLOC bus interface
GCLK The generic clock used for the GLOC is GCLK5
Table 32-6. Register Reset Values
Register Reset Value
VERSION 0x00000100
PARAMETER 0x00000002
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33. aWire UART (AW)
Rev: 2.3.0.0
33.1 Features
• Asynchronous receiver or transmitter when the aWire system is not used for debugging.
• One- or two-pin operation supported.
33.2 Overview
If the AW is not used for debugging, the aWire UART can be used by the user to send or receive
data with one start bit, eight data bits, no parity bits, and one stop bit. This can be controlled
through the aWire UART user interface.
This chapter only describes the aWire UART user interface. For a description of the aWire
Debug Interface, please see the Programming and Debugging chapter.
33.3 Block Diagram
Figure 33-1. aWire Debug Interface Block Diagram
UART
Reset
filter
External reset
AW_ENABLE
RESET_N
Baudrate Detector
RW SZ ADDR DATA
CRC
AW CONTROL
AW User Interface
SAB interface
RESET command
Power
Manager
HALT command CPU
Flash
Controller CHIP_ERASE command
aWire Debug Interface
PB
SAB
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33.4 I/O Lines Description
33.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
33.5.1 I/O Lines
The pin used by AW is multiplexed with the RESET_N pin. The reset functionality is the default
function of this pin. To enable the aWire functionality on the RESET_N pin the user must enable
the aWire UART user interface.
33.5.2 Power Management
If the CPU enters a sleep mode that disables clocks used by the aWire UART user interface, the
aWire UART user interface will stop functioning and resume operation after the system wakes
up from sleep mode.
33.5.3 Clocks
The aWire UART uses the internal 120 MHz RC oscillator (RC120M) as clock source for its
operation. When using the aWire UART user interface RC120M must enabled using the Clock
Request Register (see Section 33.6.1).
The clock for the aWire UART user interface (CLK_AW) is generated by the Power Manager.
This clock is enabled at reset, and can be disabled in the Power Manager. It is recommended to
disable the aWire UART user interface before disabling the clock, to avoid freezing the aWire
UART user interface in an undefined state.
33.5.4 Interrupts
The aWire UART user interface interrupt request line is connected to the interrupt controller.
Using the aWire UART user interface interrupt requires the interrupt controller to be programmed
first.
33.5.5 Debug Operation
If the AW is used for debugging the aWire UART user interface will not be usable.
When an external debugger forces the CPU into debug mode, the aWire UART user interface
continues normal operation. If the aWire UART user interface is configured in a way that
requires it to be periodically serviced by the CPU through interrupts or similar, improper operation
or data loss may result during debugging.
33.5.6 External Components
The AW needs an external pullup on the RESET_N pin to ensure that the pin is pulled up when
the bus is not driven.
33.6 Functional Description
The aWire UART user interface can be used as a spare Asynchronous Receiver or Transmitter
when AW is not used for debugging.
Table 33-1. I/O Lines Description
Name Description Type
DATA aWire data multiplexed with the RESET_N pin. Input/Output
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33.6.1 How to Initialize The Module
To initialize the aWire UART user interface the user must first enable the clock by writing a one
to the Clock Enable bit in the Clock Request Register (CLKR.CLKEN) and wait for the Clock
Enable bit in the Status Register (SR.CENABLED) to be set. After doing this either receive,
transmit or receive with resync must be selected by writing the corresponding value into the
Mode field of the Control (CTRL.MODE) Register. Due to the RC120M being asynchronous with
the system clock values must be allowed to propagate in the system. During this time the aWire
master will set the Busy bit in the Status Register (SR.BUSY).
After the SR.BUSY bit is cleared the Baud Rate field in the Baud Rate Register (BRR.BR) can
be written with the wanted baudrate ( ) according to the following formula ( is the RC120M
clock frequency):
After this operation the user must wait until the SR.BUSY is cleared. The interface is now ready
to be used.
33.6.2 Basic Asynchronous Receiver Operation
The aWire UART user interface must be initialized according to the sequence above, but the
CTRL.MODE field must be written to one (Receive mode).
When a data byte arrives the aWire UART user interface will indicate this by setting the Data
Ready Interrupt bit in the Status Register (SR.DREADYINT). The user must read the Data in the
Receive Holding Register (RHR.RXDATA) and clear the Interrupt bit by writing a one to the Data
Ready Interrupt Clear bit in the Status Clear Register (SCR.DREADYINT). The interface is now
ready to receive another byte.
33.6.3 Basic Asynchronous Transmitter Operation
The aWire UART user interface must be initialized according to the sequence above, but the
CTRL.MODE field must be written to two (Transmit mode).
To transmit a data byte the user must write the data to the Transmit Holding Register
(THE.TXDATA). Before the next byte can be written the SR.BUSY must be cleared.
33.6.4 Basic Asynchronous Receiver with Resynchronization
By writing three into CTRL.MODE the aWire UART user interface will assume that the first byte
it receives is a sync byte (0x55) and set BRR.BR according to this. All subsequent transfers will
assume this baudrate, unless BRR.BR is rewritten by the user.
To make the aWire UART user interface accept a new sync resynchronization the aWire UART
user interface must be disabled by writing zero to CTRL.MODE and then reenable the interface.
33.6.5 Overrun
In Receive mode an overrun can occur if the user has not read the previous received data from
the RHR.RXDATA when the newest data should be placed there. Such a condition is flagged by
setting the Overrun bit in the Status Register (SR.OVERRUN). If SR.OVERRUN is set the newest
data received is placed in RHR.RXDATA and the data that was there before is overwritten.
f
br f
aw
f
br
8f
aw
BR = -----------
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33.6.6 Interrupts
To make the CPU able to do other things while waiting for the aWire UART user interface to finish
its operations the aWire UART user interface supports generating interrupts. All status bits in
the Status Register can be used as interrupt sources, except the SR.BUSY and SR.CENABLED
bits.
To enable an interrupt the user must write a one to the corresponding bit in the Interrupt Enable
Register (IER). Upon the next zero to one transition of this SR bit the aWire UART user interface
will flag this interrupt to the CPU. To clear the interrupt the user must write a one to the corresponding
bit in the Status Clear Register (SCR).
Interrupts can be disabled by writing a one to the corresponding bit in the Interrupt Disable Register
(IDR). The interrupt Mask Register (IMR) can be read to check if an interrupt is enabled or
disabled.
33.6.7 Using the Peripheral DMA Controller
To relieve the CPU of data transfers the aWire UART user interface support using the Peripheral
DMA controller.
To transmit using the Peripheral DMA Controller do the following:
1. Setup the aWire UART user interface in transmit mode.
2. Setup the Peripheral DMA Controller with buffer address and length, use byte as transfer
size.
3. Enable the Peripheral DMA Controller.
4. Wait until the Peripheral DMA Controller is done.
To receive using the Peripheral DMA Controller do the following:
1. Setup the aWire UART user interface in receive mode
2. Setup the Peripheral DMA Controller with buffer address and length, use byte as transfer
size.
3. Enable the Peripheral DMA Controller.
4. Wait until the Peripheral DMA Controller is ready.
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33.7 User Interface
Note: 1. The reset values are device specific. Please refer to the Module Configuration section at the end of this chapter.
Table 33-2. aWire UART user interface Register Memory Map
Offset Register Register Name Access Reset
0x00 Control Register CTRL Read/Write 0x00000000
0x04 Status Register SR Read-only 0x00000000
0x08 Status Clear Register SCR Write-only -
0x0C Interrupt Enable Register IER Write-only -
0x10 Interrupt Disable Register IDR Write-only -
0x14 Interrupt Mask Register IMR Read-only 0x00000000
0x18 Receive Holding Register RHR Read-only 0x00000000
0x1C Transmit Holding Register THR Read/Write 0x00000000
0x20 Baud Rate Register BRR Read/Write 0x00000000
0x24 Version Register VERSION Read-only -(1)
0x28 Clock Request Register CLKR Read/Write 0x00000000
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33.7.1 Control Register
Name: CTRL
Access Type: Read/Write
Offset: 0x00
Reset Value: 0x00000000
• MODE: aWire UART user interface mode
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - - MODE
Table 33-3. aWire UART user interface Modes
MODE Mode Description
0 Disabled
1 Receive
2 Transmit
3 Receive with resync.
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33.7.2 Status Register
Name: SR
Access Type: Read-only
Offset: 0x04
Reset Value: 0x00000000
• TRMIS: Transmit Mismatch
0: No transfers mismatches.
1: The transceiver was active when receiving.
This bit is set when the transceiver is active when receiving.
This bit is cleared when corresponding bit in SCR is written to one.
• OVERRUN: Data Overrun
0: No data overwritten in RHR.
1: Data in RHR has been overwritten before it has been read.
This bit is set when data in RHR is overwritten before it has been read.
This bit is cleared when corresponding bit in SCR is written to one.
• DREADYINT: Data Ready Interrupt
0: No new data in the RHR.
1: New data received and placed in the RHR.
This bit is set when new data is received and placed in the RHR.
This bit is cleared when corresponding bit in SCR is written to one.
• READYINT: Ready Interrupt
0: The interface has not generated an ready interrupt.
1: The interface has had a transition from busy to not busy.
This bit is set when the interface has transition from busy to not busy.
This bit is cleared when corresponding bit in SCR is written to one.
• CENABLED: Clock Enabled
0: The aWire clock is not enabled.
1: The aWire clock is enabled.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - TRMIS - - OVERRUN DREADYINT READYINT
76543210
- - - - - CENABLED - BUSY
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This bit is set when the clock is disabled.
This bit is cleared when the clock is enabled.
• BUSY: Synchronizer Busy
0: The asynchronous interface is ready to accept more data.
1: The asynchronous interface is busy and will block writes to CTRL, BRR, and THR.
This bit is set when the asynchronous interface becomes busy.
This bit is cleared when the asynchronous interface becomes ready.
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33.7.3 Status Clear Register
Name: SCR
Access Type: Write-only
Offset: 0x08
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in SR and the corresponding interrupt request.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - TRMIS - - OVERRUN DREADYINT READYINT
76543210
--------
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33.7.4 Interrupt Enable Register
Name: IER
Access Type: Write-only
Offset: 0x0C
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will set the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - TRMIS - - OVERRUN DREADYINT READYINT
76543210
--------
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33.7.5 Interrupt Disable Register
Name: IDR
Access Type: Write-only
Offset: 0x10
Reset Value: 0x00000000
Writing a zero to a bit in this register has no effect.
Writing a one to a bit in this register will clear the corresponding bit in IMR.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - TRMIS - - OVERRUN DREADYINT READYINT
76543210
--------
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33.7.6 Interrupt Mask Register
Name: IMR
Access Type: Read-only
Offset: 0x14
Reset Value: 0x00000000
0: The corresponding interrupt is disabled.
1: The corresponding interrupt is enabled.
A bit in this register is cleared when the corresponding bit in IDR is written to one.
A bit in this register is set when the corresponding bit in IER is written to one.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - TRMIS - - OVERRUN DREADYINT READYINT
76543210
--------
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33.7.7 Receive Holding Register
Name: RHR
Access Type: Read-only
Offset: 0x18
Reset Value: 0x00000000
• RXDATA: Received Data
The last byte received.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
RXDATA
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33.7.8 Transmit Holding Register
Name: THR
Access Type: Read/Write
Offset: 0x1C
Reset Value: 0x00000000
• TXDATA: Transmit Data
The data to send.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
TXDATA
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33.7.9 Baud Rate Register
Name: BRR
Access Type: Read/Write
Offset: 0x20
Reset Value: 0x00000000
• BR: Baud Rate
The baud rate ( ) of the transmission, calculated using the following formula ( is the RC120M frequency):
BR should not be set to a value smaller than 32.
Writing a value to this field will update the baud rate of the transmission.
Reading this field will give the current baud rate of the transmission.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
BR[15:8]
76543210
BR[7:0]
f
br f
aw
f
br
8f
aw
BR = -----------
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33.7.10 Version Register
Name: VERSION
Access Type: Read-only
Offset: 0x24
Reset Value: 0x00000200
• VERSION: Version Number
Version number of the module. No functionality associated.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
- - - - VERSION[11:8]
76543210
VERSION[7:0]
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33.7.11 Clock Request Register
Name: CLKR
Access Type: Read/Write
Offset: 0x28
Reset Value: 0x00000000
• CLKEN: Clock Enable
0: The aWire clock is disabled.
1: The aWire clock is enabled.
Writing a zero to this bit will disable the aWire clock.
Writing a one to this bit will enable the aWire clock.
31 30 29 28 27 26 25 24
--------
23 22 21 20 19 18 17 16
--------
15 14 13 12 11 10 9 8
--------
76543210
- - - - - - - CLKEN
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33.8 Module Configuration
The specific configuration for each aWire instance is listed in the following tables.The module
bus clocks listed here are connected to the system bus clocks. Please refer to the Power Manager
chapter for details.
Table 33-4. AW Clocks
Clock Name Description
CLK_AW Clock for the AW bus interface
Table 33-5. Register Reset Values
Register Reset Value
VERSION 0x00000230
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34. Programming and Debugging
34.1 Overview
The ATUC64/128/256L3/4U supports programming and debugging through two interfaces,
JTAG or aWire. JTAG is an industry standard interface and allows boundary scan for PCB testing,
as well as daisy-chaining of multiple devices on the PCB. aWire is an Atmel proprietary
protocol which offers higher throughput and robust communication, and does not require application
pins to be reserved. Either interface provides access to the internal Service Access Bus
(SAB), which offers a bridge to the High Speed Bus, giving access to memories and peripherals
in the device. By using this bridge to the bus system, the flash and fuses can thus be programmed
by accessing the Flash Controller in the same manner as the CPU.
The SAB also provides access to the Nexus-compliant On-chip Debug (OCD) system in the
device, which gives the user non-intrusive run-time control of the program execution. Additionally,
trace information can be output on the Auxiliary (AUX) debug port or buffered in internal
RAM for later retrieval by JTAG or aWire.
34.2 Service Access Bus
The AVR32 architecture offers a common interface for access to On-chip Debug, programming,
and test functions. These are mapped on a common bus called the Service Access Bus (SAB),
which is linked to the JTAG and aWire port through a bus master module, which also handles
synchronization between the debugger and SAB clocks.
When accessing the SAB through the debugger there are no limitations on debugger frequency
compared to chip frequency, although there must be an active system clock in order for the SAB
accesses to complete. If the system clock is switched off in sleep mode, activity on the debugger
will restart the system clock automatically, without waking the device from sleep. Debuggers
may optimize the transfer rate by adjusting the frequency in relation to the system clock. This
ratio can be measured with debug protocol specific instructions.
The Service Access Bus uses 36 address bits to address memory or registers in any of the
slaves on the bus. The bus supports sized accesses of bytes (8 bits), halfwords (16 bits), or
words (32 bits). All accesses must be aligned to the size of the access, i.e. halfword accesses
must have the lowest address bit cleared, and word accesses must have the two lowest address
bits cleared.
34.2.1 SAB Address Map
The SAB gives the user access to the internal address space and other features through a 36
bits address space. The 4 MSBs identify the slave number, while the 32 LSBs are decoded
within the slave’s address space. The SAB slaves are shown in Table 34-1.
Table 34-1. SAB Slaves, Addresses and Descriptions
Slave Address [35:32] Description
Unallocated 0x0 Intentionally unallocated
OCD 0x1 OCD registers
HSB 0x4 HSB memory space, as seen by the CPU
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34.2.2 SAB Security Restrictions
The Service Access bus can be restricted by internal security measures. A short description of
the security measures are found in the table below.
34.2.2.1 Security measure and control location
A security measure is a mechanism to either block or allow SAB access to a certain address or
address range. A security measure is enabled or disabled by one or several control signals. This
is called the control location for the security measure.
These security measures can be used to prevent an end user from reading out the code programmed
in the flash, for instance.
Below follows a more in depth description of what locations are accessible when the security
measures are active.
Note: 1. Second Word of the User Page, refer to the Fuses Settings section for details.
HSB 0x5 Alternative mapping for HSB space, for compatibility with
other 32-bit AVR devices.
Memory Service
Unit 0x6 Memory Service Unit registers
Reserved Other Unused
Table 34-1. SAB Slaves, Addresses and Descriptions
Slave Address [35:32] Description
Table 34-2. SAB Security Measures
Security Measure Control Location Description
Secure mode FLASHCDW
SECURE bits set
Allocates a portion of the flash for secure code. This code
cannot be read or debugged. The User page is also locked.
Security bit FLASHCDW
security bit set
Programming and debugging not possible, very restricted
access.
User code
programming
FLASHCDW
UPROT + security
bit set
Restricts all access except parts of the flash and the flash
controller for programming user code. Debugging is not
possible unless an OS running from the secure part of the
flash supports it.
Table 34-3. Secure Mode SAB Restrictions
Name Address Start Address End Access
Secure flash area 0x580000000 0x580000000 +
(USERPAGE[15:0] << 10) Blocked
Secure RAM area 0x500000000 0x500000000 +
(USERPAGE[31:16] << 10) Blocked
User page 0x580800000 0x581000000 Read
Other accesses - - As normal
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Table 34-4. Security Bit SAB Restrictions
Name Address start Address end Access
OCD DCCPU,
OCD DCEMU,
OCD DCSR
0x100000110 0x100000118 Read/Write
User page 0x580800000 0x581000000 Read
Other accesses - - Blocked
Table 34-5. User Code Programming SAB Restrictions
Name Address start Address end Access
OCD DCCPU,
OCD DCEMU,
OCD DCSR
0x100000110 0x100000118 Read/Write
User page 0x580800000 0x581000000 Read
FLASHCDW PB
interface 0x5FFFE0000 0x5FFFE0400 Read/Write
FLASH pages
outside
BOOTPROT
0x580000000 +
BOOTPROT size 0x580000000 + Flash size Read/Write
Other accesses - - Blocked
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34.3 On-Chip Debug
Rev: 2.1.2.0
34.3.1 Features
• Debug interface in compliance with IEEE-ISTO 5001-2003 (Nexus 2.0) Class 2+
• JTAG or aWire access to all on-chip debug functions
• Advanced Program, Data, Ownership, and Watchpoint trace supported
• NanoTrace aWire- or JTAG-based trace access
• Auxiliary port for high-speed trace information
• Hardware support for 6 Program and 2 Data breakpoints
• Unlimited number of software breakpoints supported
• Automatic CRC check of memory regions
34.3.2 Overview
Debugging on the ATUC64/128/256L3/4U is facilitated by a powerful On-Chip Debug (OCD)
system. The user accesses this through an external debug tool which connects to the JTAG or
aWire port and the Auxiliary (AUX) port if implemented. The AUX port is primarily used for trace
functions, and an aWire- or JTAG-based debugger is sufficient for basic debugging.
The debug system is based on the Nexus 2.0 standard, class 2+, which includes:
• Basic run-time control
• Program breakpoints
• Data breakpoints
• Program trace
• Ownership trace
• Data trace
In addition to the mandatory Nexus debug features, the ATUC64/128/256L3/4U implements
several useful OCD features, such as:
• Debug Communication Channel between CPU and debugger
• Run-time PC monitoring
• CRC checking
• NanoTrace
• Software Quality Assurance (SQA) support
The OCD features are controlled by OCD registers, which can be accessed by the debugger, for
instance when the NEXUS_ACCESS JTAG instruction is loaded. The CPU can also access
OCD registers directly using mtdr/mfdr instructions in any privileged mode. The OCD registers
are implemented based on the recommendations in the Nexus 2.0 standard, and are detailed in
the AVR32UC Technical Reference Manual.
34.3.3 I/O Lines Description
The OCD AUX trace port contains a number of pins, as shown in Table 34-6 on page 848.
These are multiplexed with I/O Controller lines, and must explicitly be enabled by writing OCD
registers before the debug session starts. The AUX port is mapped to two different locations,
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ATUC64/128/256L3/4U
selectable by OCD Registers, minimizing the chance that the AUX port will need to be shared
with an application.
34.3.4 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
34.3.4.1 Power Management
The OCD clock operates independently of the CPU clock. If enabled in the Power Manager, the
OCD clock (CLK_OCD) will continue running even if the CPU enters a sleep mode that disables
the CPU clock.
34.3.4.2 Clocks
The OCD has a clock (CLK_OCD) running synchronously with the CPU clock. This clock is generated
by the Power Manager. The clock is enabled at reset, and can be disabled by writing to
the Power Manager.
34.3.4.3 Interrupt
The OCD system interrupt request lines are connected to the interrupt controller. Using the OCD
interrupts requires the interrupt controller to be programmed first.
Table 34-6. Auxiliary Port Signals
Pin Name Pin Description Direction Active Level Type
MCKO Trace data output clock Output Digital
MDO[5:0] Trace data output Output Digital
MSEO[1:0] Trace frame control Output Digital
EVTI_N Event In Input Low Digital
EVTO_N Event Out Output Low Digital
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34.3.5 Block Diagram
Figure 34-1. On-Chip Debug Block Diagram
34.3.6 SAB-based Debug Features
A debugger can control all OCD features by writing OCD registers over the SAB interface. Many
of these do not depend on output on the AUX port, allowing an aWire- or JTAG-based debugger
to be used.
A JTAG-based debugger should connect to the device through a standard 10-pin IDC connector
as described in the AVR32UC Technical Reference Manual.
An aWire-based debugger should connect to the device through the RESET_N pin.
On-Chip Debug
JTAG
Debug PC
Debug
Instruction
CPU
Breakpoints
Program
Trace Data Trace Ownership
Trace
Transmit Queue Watchpoints
AUX
JTAG
Internal
SRAM
Service Access Bus
Memory
Service
Unit
HSB Bus Matrix Memories and
peripherals
aWire
aWire
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Figure 34-2. JTAG-based Debugger
Figure 34-3. aWire-based Debugger
34.3.6.1 Debug Communication Channel
The Debug Communication Channel (DCC) consists of a pair OCD registers with associated
handshake logic, accessible to both CPU and debugger. The registers can be used to exchange
data between the CPU and the debugmaster, both runtime as well as in debug mode.
32-bit AVR
JTAG-based
debug tool
PC
JTAG
10-pin IDC
32-bit AVR
aWire-based
debug tool
PC
aWire
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The OCD system can generate an interrupt to the CPU when DCCPU is read and when DCEMU
is written. This enables the user to build a custum debug protocol using only these registers. The
DCCPU and DCEMU registers are available even when the security bit in the flash is active.
For more information refer to the AVR32UC Technical Reference Manual.
34.3.6.2 Breakpoints
One of the most fundamental debug features is the ability to halt the CPU, to examine registers
and the state of the system. This is accomplished by breakpoints, of which many types are
available:
• Unconditional breakpoints are set by writing OCD registers by the debugger, halting the CPU
immediately.
• Program breakpoints halt the CPU when a specific address in the program is executed.
• Data breakpoints halt the CPU when a specific memory address is read or written, allowing
variables to be watched.
• Software breakpoints halt the CPU when the breakpoint instruction is executed.
When a breakpoint triggers, the CPU enters debug mode, and the D bit in the status register is
set. This is a privileged mode with dedicated return address and return status registers. All privileged
instructions are permitted. Debug mode can be entered as either OCD Mode, running
instructions from the debugger, or Monitor Mode, running instructions from program memory.
34.3.6.3 OCD Mode
When a breakpoint triggers, the CPU enters OCD mode, and instructions are fetched from the
Debug Instruction OCD register. Each time this register is written by the debugger, the instruction
is executed, allowing the debugger to execute CPU instructions directly. The debug master
can e.g. read out the register file by issuing mtdr instructions to the CPU, writing each register to
the Debug Communication Channel OCD registers.
34.3.6.4 Monitor Mode
Since the OCD registers are directly accessible by the CPU, it is possible to build a softwarebased
debugger that runs on the CPU itself. Setting the Monitor Mode bit in the Development
Control register causes the CPU to enter Monitor Mode instead of OCD mode when a breakpoint
triggers. Monitor Mode is similar to OCD mode, except that instructions are fetched from the
debug exception vector in regular program memory, instead of issued by the debug master.
34.3.6.5 Program Counter Monitoring
Normally, the CPU would need to be halted for a debugger to examine the current PC value.
However, the ATUC64/128/256L3/4U also proves a Debug Program Counter OCD register,
where the debugger can continuously read the current PC without affecting the CPU. This allows
the debugger to generate a simple statistic of the time spent in various areas of the code, easing
code optimization.
34.3.7 Memory Service Unit
The Memory Service Unit (MSU) is a block dedicated to test and debug functionality. It is controlled
through a dedicated set of registers addressed through the Service Access Bus.
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34.3.7.1 Cyclic Redundancy Check (CRC)
The MSU can be used to automatically calculate the CRC of a block of data in memory. The
MSU will then read out each word in the specified memory block and report the CRC32-value in
an MSU register.
34.3.7.2 NanoTrace
The MSU additionally supports NanoTrace. This is a 32-bit AVR-specific feature, in which trace
data is output to memory instead of the AUX port. This allows the trace data to be extracted by
the debugger through the SAB, enabling trace features for aWire- or JTAG-based debuggers.
The user must write MSU registers to configure the address and size of the memory block to be
used for NanoTrace. The NanoTrace buffer can be anywhere in the physical address range,
including internal and external RAM, through an EBI, if present. This area may not be used by
the application running on the CPU.
34.3.8 AUX-based Debug Features
Utilizing the Auxiliary (AUX) port gives access to a wide range of advanced debug features. Of
prime importance are the trace features, which allow an external debugger to receive continuous
information on the program execution in the CPU. Additionally, Event In and Event Out pins
allow external events to be correlated with the program flow.
Debug tools utilizing the AUX port should connect to the device through a Nexus-compliant Mictor-38
connector, as described in the AVR32UC Technical Reference manual. This connector
includes the JTAG signals and the RESET_N pin, giving full access to the programming and
debug features in the device.
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Figure 34-4. AUX+JTAG Based Debugger
34.3.8.1 Trace Operation
Trace features are enabled by writing OCD registers by the debugger. The OCD extracts the
trace information from the CPU, compresses this information and formats it into variable-length
messages according to the Nexus standard. The messages are buffered in a 16-frame transmit
queue, and are output on the AUX port one frame at a time.
The trace features can be configured to be very selective, to reduce the bandwidth on the AUX
port. In case the transmit queue overflows, error messages are produced to indicate loss of
data. The transmit queue module can optionally be configured to halt the CPU when an overflow
occurs, to prevent the loss of messages, at the expense of longer run-time for the program.
34.3.8.2 Program Trace
Program trace allows the debugger to continuously monitor the program execution in the CPU.
Program trace messages are generated for every branch in the program, and contains compressed
information, which allows the debugger to correlate the message with the source code
to identify the branch instruction and target address.
34.3.8.3 Data Trace
Data trace outputs a message every time a specific location is read or written. The message
contains information about the type (read/write) and size of the access, as well as the address
and data of the accessed location. The ATUC64/128/256L3/4U contains two data trace chanAVR32
AUX+JTAG
debu g tool
JTAG AUX
h ig h s p e e d
M ic to r3 8
T ra ce b u ffe r
P C
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nels, each of which are controlled by a pair of OCD registers which determine the range of
addresses (or single address) which should produce data trace messages.
34.3.8.4 Ownership Trace
Program and data trace operate on virtual addresses. In cases where an operating system runs
several processes in overlapping virtual memory segments, the Ownership Trace feature can be
used to identify the process switch. When the O/S activates a process, it will write the process ID
number to an OCD register, which produces an Ownership Trace Message, allowing the debugger
to switch context for the subsequent program and data trace messages. As the use of this
feature depends on the software running on the CPU, it can also be used to extract other types
of information from the system.
34.3.8.5 Watchpoint Messages
The breakpoint modules normally used to generate program and data breakpoints can also be
used to generate Watchpoint messages, allowing a debugger to monitor program and data
events without halting the CPU. Watchpoints can be enabled independently of breakpoints, so a
breakpoint module can optionally halt the CPU when the trigger condition occurs. Data trace
modules can also be configured to produce watchpoint messages instead of regular data trace
messages.
34.3.8.6 Event In and Event Out Pins
The AUX port also contains an Event In pin (EVTI_N) and an Event Out pin (EVTO_N). EVTI_N
can be used to trigger a breakpoint when an external event occurs. It can also be used to trigger
specific program and data trace synchronization messages, allowing an external event to be
correlated to the program flow.
When the CPU enters debug mode, a Debug Status message is transmitted on the trace port.
All trace messages can be timestamped when they are received by the debug tool. However,
due to the latency of the transmit queue buffering, the timestamp will not be 100% accurate. To
improve this, EVTO_N can toggle every time a message is inserted into the transmit queue,
allowing trace messages to be timestamped precisely. EVTO_N can also toggle when a breakpoint
module triggers, or when the CPU enters debug mode, for any reason. This can be used to
measure precisely when the respective internal event occurs.
34.3.8.7 Software Quality Analysis (SQA)
Software Quality Analysis (SQA) deals with two important issues regarding embedded software
development. Code coverage involves identifying untested parts of the embedded code, to
improve test procedures and thus the quality of the released software. Performance analysis
allows the developer to precisely quantify the time spent in various parts of the code, allowing
bottlenecks to be identified and optimized.
Program trace must be used to accomplish these tasks without instrumenting (altering) the code
to be examined. However, traditional program trace cannot reconstruct the current PC value
without correlating the trace information with the source code, which cannot be done on-the-fly.
This limits program trace to a relatively short time segment, determined by the size of the trace
buffer in the debug tool.
The OCD system in ATUC64/128/256L3/4U extends program trace with SQA capabilities, allowing
the debug tool to reconstruct the PC value on-the-fly. Code coverage and performance
analysis can thus be reported for an unlimited execution sequence.
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34.4 JTAG and Boundary-scan (JTAG)
Rev: 2.2.2.4
34.4.1 Features
• IEEE1149.1 compliant JTAG Interface
• Boundary-scan Chain for board-level testing
• Direct memory access and programming capabilities through JTAG Interface
34.4.2 Overview
The JTAG Interface offers a four pin programming and debug solution, including boundary-scan
support for board-level testing.
Figure 34-5 on page 856 shows how the JTAG is connected in an 32-bit AVR device. The TAP
Controller is a state machine controlled by the TCK and TMS signals. The TAP Controller
selects either the JTAG Instruction Register or one of several Data Registers as the scan chain
(shift register) between the TDI-input and TDO-output.
The Instruction Register holds JTAG instructions controlling the behavior of a Data Register. The
Device Identification Register, Bypass Register, and the boundary-scan chain are the Data Registers
used for board-level testing. The Reset Register can be used to keep the device reset
during test or programming.
The Service Access Bus (SAB) interface contains address and data registers for the Service
Access Bus, which gives access to On-Chip Debug, programming, and other functions in the
device. The SAB offers several modes of access to the address and data registers, as described
in Section 34.4.11.
Section 34.5 lists the supported JTAG instructions, with references to the description in this
document.
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34.4.3 Block Diagram
Figure 34-5. JTAG and Boundary-scan Access
34.4.4 I/O Lines Description
34.4.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
Table 34-7. I/O Line Description
Pin Name Pin Description Type Active Level
RESET_N External reset pin. Used when enabling and disabling the JTAG. Input Low
TCK Test Clock Input. Fully asynchronous to system clock frequency. Input
TMS Test Mode Select, sampled on rising TCK. Input
TDI Test Data In, sampled on rising TCK. Input
TDO Test Data Out, driven on falling TCK. Output
32-bit AVR device
JTAG data registers
TAP
Controller
Instruction Register
Device Identification
Register
By-pass Register
Reset Register
Service Access Bus
interface
Boundary Scan Chain
Pins and analog blocks
Data register
scan enable
JTAG Pins
Boundary scan enable
2nd JTAG
device
JTAG master
TDO TDI
Part specific registers
...
TMS TDO TDI
TMS
TCK
TCK
Instruction register
scan enable
SAB Internal I/O
lines
JTAG
TMS
TDI
TDO
TCK
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34.4.5.1 I/O Lines
The TMS, TDI, TDO, and TCK pins are multiplexed with I/O lines. When the JTAG is used the
associated pins must be enabled. To enable the JTAG pins, refer to Section 34.4.7.
While using the multiplexed JTAG lines all normal peripheral activity on these lines is disabled.
The user must make sure that no external peripheral is blocking the JTAG lines while
debugging.
34.4.5.2 Power Management
When an instruction that accesses the SAB is loaded in the instruction register, before entering
a sleep mode, the system clocks are not switched off to allow debugging in sleep modes. This
can lead to a program behaving differently when debugging.
34.4.5.3 Clocks
The JTAG Interface uses the external TCK pin as clock source. This clock must be provided by
the JTAG master.
Instructions that use the SAB bus requires the internal main clock to be running.
34.4.6 JTAG Interface
The JTAG Interface is accessed through the dedicated JTAG pins shown in Table 34-7 on page
856. The TMS control line navigates the TAP controller, as shown in Figure 34-6 on page 858.
The TAP controller manages the serial access to the JTAG Instruction and Data registers. Data
is scanned into the selected instruction or data register on TDI, and out of the register on TDO,
in the Shift-IR and Shift-DR states, respectively. The LSB is shifted in and out first. TDO is highZ
in other states than Shift-IR and Shift-DR.
The device implements a 5-bit Instruction Register (IR). A number of public JTAG instructions
defined by the JTAG standard are supported, as described in Section 34.5.2, as well as a number
of 32-bit AVR-specific private JTAG instructions described in Section 34.5.3. Each
instruction selects a specific data register for the Shift-DR path, as described for each
instruction.
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Figure 34-6. TAP Controller State Diagram
Test-LogicReset
Run-Test/
Idle
Select-DR
Scan
Select-IR
Scan
Capture-DR Capture-IR
Shift-DR Shift-IR
Exit1-DR Exit1-IR
Pause-DR Pause-IR
Exit2-DR Exit2-IR
Update-DR Update-IR
0
1 1
1
0
0
1
0
1
1
0
0
1
0
1
1
1
0
1 1
0 0
1 1
0
1
0
0 0
0
0
1
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34.4.7 How to Initialize the Module
To enable the JTAG pins the TCK pin must be held low while the RESET_N pin is released.
After enabling the JTAG interface the halt bit is set automatically to prevent the system from running
code after the interface is enabled. To make the CPU run again set halt to zero using the
HALT command..
JTAG operation when RESET_N is pulled low is not possible.
Independent of the initial state of the TAP Controller, the Test-Logic-Reset state can always be
entered by holding TMS high for 5 TCK clock periods. This sequence should always be applied
at the start of a JTAG session and after enabling the JTAG pins to bring the TAP Controller into
a defined state before applying JTAG commands. Applying a 0 on TMS for 1 TCK period brings
the TAP Controller to the Run-Test/Idle state, which is the starting point for JTAG operations.
34.4.8 How to disable the module
To disable the JTAG pins the TCK pin must be held high while RESET_N pin is released.
34.4.9 Typical Sequence
Assuming Run-Test/Idle is the present state, a typical scenario for using the JTAG Interface
follows.
34.4.9.1 Scanning in JTAG Instruction
At the TMS input, apply the sequence 1, 1, 0, 0 at the rising edges of TCK to enter the Shift
Instruction Register (Shift-IR) state. While in this state, shift the 5 bits of the JTAG instructions
into the JTAG instruction register from the TDI input at the rising edge of TCK. During shifting,
the JTAG outputs status bits on TDO, refer to Section 34.5 for a description of these. The TMS
input must be held low during input of the 4 LSBs in order to remain in the Shift-IR state. The
JTAG Instruction selects a particular Data Register as path between TDI and TDO and controls
the circuitry surrounding the selected Data Register.
Apply the TMS sequence 1, 1, 0 to re-enter the Run-Test/Idle state. The instruction is latched
onto the parallel output from the shift register path in the Update-IR state. The Exit-IR, Pause-IR,
and Exit2-IR states are only used for navigating the state machine.
Figure 34-7. Scanning in JTAG Instruction
34.4.9.2 Scanning in/out Data
At the TMS input, apply the sequence 1, 0, 0 at the rising edges of TCK to enter the Shift Data
Register (Shift-DR) state. While in this state, upload the selected Data Register (selected by the
present JTAG instruction in the JTAG Instruction Register) from the TDI input at the rising edge
TCK
TAP State TLR RTI SelDR SelIR CapIR ShIR Ex1IR UpdIR RTI
TMS
TDI Instruction
TDO ImplDefined
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of TCK. In order to remain in the Shift-DR state, the TMS input must be held low. While the Data
Register is shifted in from the TDI pin, the parallel inputs to the Data Register captured in the
Capture-DR state is shifted out on the TDO pin.
Apply the TMS sequence 1, 1, 0 to re-enter the Run-Test/Idle state. If the selected Data Register
has a latched parallel-output, the latching takes place in the Update-DR state. The Exit-DR,
Pause-DR, and Exit2-DR states are only used for navigating the state machine.
As shown in the state diagram, the Run-Test/Idle state need not be entered between selecting
JTAG instruction and using Data Registers.
34.4.10 Boundary-scan
The boundary-scan chain has the capability of driving and observing the logic levels on the digital
I/O pins, as well as the boundary between digital and analog logic for analog circuitry having
off-chip connections. At system level, all ICs having JTAG capabilities are connected serially by
the TDI/TDO signals to form a long shift register. An external controller sets up the devices to
drive values at their output pins, and observe the input values received from other devices. The
controller compares the received data with the expected result. In this way, boundary-scan provides
a mechanism for testing interconnections and integrity of components on Printed Circuits
Boards by using the 4 TAP signals only.
The four IEEE 1149.1 defined mandatory JTAG instructions IDCODE, BYPASS, SAMPLE/PRELOAD,
and EXTEST can be used for testing the Printed Circuit Board. Initial scanning of the
data register path will show the ID-code of the device, since IDCODE is the default JTAG
instruction. It may be desirable to have the 32-bit AVR device in reset during test mode. If not
reset, inputs to the device may be determined by the scan operations, and the internal software
may be in an undetermined state when exiting the test mode. If needed, the BYPASS instruction
can be issued to make the shortest possible scan chain through the device. The device can be
set in the reset state either by pulling the external RESETn pin low, or issuing the AVR_RESET
instruction with appropriate setting of the Reset Data Register.
The EXTEST instruction is used for sampling external pins and loading output pins with data.
The data from the output latch will be driven out on the pins as soon as the EXTEST instruction
is loaded into the JTAG IR-register. Therefore, the SAMPLE/PRELOAD should also be used for
setting initial values to the scan ring, to avoid damaging the board when issuing the EXTEST
instruction for the first time. SAMPLE/PRELOAD can also be used for taking a snapshot of the
external pins during normal operation of the part.
When using the JTAG Interface for boundary-scan, the JTAG TCK clock is independent of the
internal chip clock. The internal chip clock is not required to run during boundary-scan
operations.
NOTE: For pins connected to 5V lines care should be taken to not drive the pins to a logic one
using boundary-scan, as this will create a current flowing from the 3,3V driver to the 5V pull-up
on the line. Optionally a series resistor can be added between the line and the pin to reduce the
current.
Details about the boundary-scan chain can be found in the BSDL file for the device. This can be
found on the Atmel website.
34.4.11 Service Access Bus
The AVR32 architecture offers a common interface for access to On-Chip Debug, programming,
and test functions. These are mapped on a common bus called the Service Access Bus (SAB),
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which is linked to the JTAG through a bus master module, which also handles synchronization
between the TCK and SAB clocks.
For more information about the SAB and a list of SAB slaves see the Service Access Bus
chapter.
34.4.11.1 SAB Address Mode
The MEMORY_SIZED_ACCESS instruction allows a sized read or write to any 36-bit address
on the bus. MEMORY_WORD_ACCESS is a shorthand instruction for 32-bit accesses to any
36-bit address, while the NEXUS_ACCESS instruction is a Nexus-compliant shorthand instruction
for accessing the 32-bit OCD registers in the 7-bit address space reserved for these. These
instructions require two passes through the Shift-DR TAP state: one for the address and control
information, and one for data.
34.4.11.2 Block Transfer
To increase the transfer rate, consecutive memory accesses can be accomplished by the
MEMORY_BLOCK_ACCESS instruction, which only requires a single pass through Shift-DR for
data transfer only. The address is automatically incremented according to the size of the last
SAB transfer.
34.4.11.3 Canceling a SAB Access
It is possible to abort an ongoing SAB access by the CANCEL_ACCESS instruction, to avoid
hanging the bus due to an extremely slow slave.
34.4.11.4 Busy Reporting
As the time taken to perform an access may vary depending on system activity and current chip
frequency, all the SAB access JTAG instructions can return a busy indicator. This indicates
whether a delay needs to be inserted, or an operation needs to be repeated in order to be successful.
If a new access is requested while the SAB is busy, the request is ignored.
The SAB becomes busy when:
• Entering Update-DR in the address phase of any read operation, e.g., after scanning in a
NEXUS_ACCESS address with the read bit set.
• Entering Update-DR in the data phase of any write operation, e.g., after scanning in data for
a NEXUS_ACCESS write.
• Entering Update-DR during a MEMORY_BLOCK_ACCESS.
• Entering Update-DR after scanning in a counter value for SYNC.
• Entering Update-IR after scanning in a MEMORY_BLOCK_ACCESS if the previous access
was a read and data was scanned after scanning the address.
The SAB becomes ready again when:
• A read or write operation completes.
• A SYNC countdown completed.
• A operation is cancelled by the CANCEL_ACCESS instruction.
What to do if the busy bit is set:
• During Shift-IR: The new instruction is selected, but the previous operation has not yet
completed and will continue (unless the new instruction is CANCEL_ACCESS). You may
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continue shifting the same instruction until the busy bit clears, or start shifting data. If shifting
data, you must be prepared that the data shift may also report busy.
• During Shift-DR of an address: The new address is ignored. The SAB stays in address mode,
so no data must be shifted. Repeat the address until the busy bit clears.
• During Shift-DR of read data: The read data is invalid. The SAB stays in data mode. Repeat
scanning until the busy bit clears.
• During Shift-DR of write data: The write data is ignored. The SAB stays in data mode. Repeat
scanning until the busy bit clears.
34.4.11.5 Error Reporting
The Service Access Bus may not be able to complete all accesses as requested. This may be
because the address is invalid, the addressed area is read-only or cannot handle byte/halfword
accesses, or because the chip is set in a protected mode where only limited accesses are
allowed.
The error bit is updated when an access completes, and is cleared when a new access starts.
What to do if the error bit is set:
• During Shift-IR: The new instruction is selected. The last operation performed using the old
instruction did not complete successfully.
• During Shift-DR of an address: The previous operation failed. The new address is accepted.
If the read bit is set, a read operation is started.
• During Shift-DR of read data: The read operation failed, and the read data is invalid.
• During Shift-DR of write data: The previous write operation failed. The new data is accepted
and a write operation started. This should only occur during block writes or stream writes. No
error can occur between scanning a write address and the following write data.
• While polling with CANCEL_ACCESS: The previous access was cancelled. It may or may not
have actually completed.
• After power-up: The error bit is set after power up, but there has been no previous SAB
instruction so this error can be discarded.
34.4.11.6 Protected Reporting
A protected status may be reported during Shift-IR or Shift-DR. This indicates that the security
bit in the Flash Controller is set and that the chip is locked for access, according to Section
34.5.1.
The protected state is reported when:
• The Flash Controller is under reset. This can be due to the AVR_RESET command or the
RESET_N line.
• The Flash Controller has not read the security bit from the flash yet (This will take a a few
ms). Happens after the Flash Controller reset has been released.
• The security bit in the Flash Controller is set.
What to do if the protected bit is set:
• Release all active AVR_RESET domains, if any.
• Release the RESET_N line.
• Wait a few ms for the security bit to clear. It can be set temporarily due to a reset.
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• Perform a CHIP_ERASE to clear the security bit. NOTE: This will erase all the contents of the
non-volatile memory.
34.5 JTAG Instruction Summary
The implemented JTAG instructions in the 32-bit AVR are shown in the table below.
34.5.1 Security Restrictions
When the security fuse in the Flash is programmed, the following JTAG instructions are
restricted:
• NEXUS_ACCESS
• MEMORY_WORD_ACCESS
• MEMORY_BLOCK_ACCESS
• MEMORY_SIZED_ACCESS
For description of what memory locations remain accessible, please refer to the SAB address
map.
Full access to these instructions is re-enabled when the security fuse is erased by the
CHIP_ERASE JTAG instruction.
Table 34-8. JTAG Instruction Summary
Instruction
OPCODE Instruction Description
0x01 IDCODE Select the 32-bit Device Identification register as data register.
0x02 SAMPLE_PRELOAD Take a snapshot of external pin values without affecting system operation.
0x03 EXTEST Select boundary-scan chain as data register for testing circuitry external to
the device.
0x04 INTEST Select boundary-scan chain for internal testing of the device.
0x06 CLAMP Bypass device through Bypass register, while driving outputs from boundaryscan
register.
0x0C AVR_RESET Apply or remove a static reset to the device
0x0F CHIP_ERASE Erase the device
0x10 NEXUS_ACCESS Select the SAB Address and Data registers as data register for the TAP. The
registers are accessed in Nexus mode.
0x11 MEMORY_WORD_ACCESS Select the SAB Address and Data registers as data register for the TAP.
0x12 MEMORY_BLOCK_ACCESS Select the SAB Data register as data register for the TAP. The address is
auto-incremented.
0x13 CANCEL_ACCESS Cancel an ongoing Nexus or Memory access.
0x14 MEMORY_SERVICE Select the SAB Address and Data registers as data register for the TAP. The
registers are accessed in Memory Service mode.
0x15 MEMORY_SIZED_ACCESS Select the SAB Address and Data registers as data register for the TAP.
0x17 SYNC Synchronization counter
0x1C HALT Halt the CPU for safe programming.
0x1F BYPASS Bypass this device through the bypass register.
Others N/A Acts as BYPASS
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Note that the security bit will read as programmed and block these instructions also if the Flash
Controller is statically reset.
Other security mechanisms can also restrict these functions. If such mechanisms are present
they are listed in the SAB address map section.
34.5.1.1 Notation
Table 34-10 on page 864 shows bit patterns to be shifted in a format like "peb01". Each character
corresponds to one bit, and eight bits are grouped together for readability. The least
significantbit is always shifted first, and the most significant bit shifted last. The symbols used
are shown in Table 34-9.
In many cases, it is not required to shift all bits through the data register. Bit patterns are shown
using the full width of the shift register, but the suggested or required bits are emphasized using
bold text. I.e. given the pattern "aaaaaaar xxxxxxxx xxxxxxxx xxxxxxxx xx", the shift register is
34 bits, but the test or debug unit may choose to shift only 8 bits "aaaaaaar".
The following describes how to interpret the fields in the instruction description tables:
Table 34-9. Symbol Description
Symbol Description
0 Constant low value - always reads as zero.
1 Constant high value - always reads as one.
a An address bit - always scanned with the least significant bit first
b A busy bit. Reads as one if the SAB was busy, or zero if it was not. See Section 34.4.11.4 for
details on how the busy reporting works.
d A data bit - always scanned with the least significant bit first.
e An error bit. Reads as one if an error occurred, or zero if not. See Section 34.4.11.5 for
details on how the error reporting works.
p
The chip protected bit. Some devices may be set in a protected state where access to chip
internals are severely restricted. See the documentation for the specific device for details.
On devices without this possibility, this bit always reads as zero.
r A direction bit. Set to one to request a read, set to zero to request a write.
s A size bit. The size encoding is described where used.
x A don’t care bit. Any value can be shifted in, and output data should be ignored.
Table 34-10. Instruction Description
Instruction Description
IR input value
Shows the bit pattern to shift into IR in the Shift-IR state in order to select this
instruction. The pattern is show both in binary and in hexadecimal form for
convenience.
Example: 10000 (0x10)
IR output value
Shows the bit pattern shifted out of IR in the Shift-IR state when this instruction is
active.
Example: peb01
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34.5.2 Public JTAG Instructions
The JTAG standard defines a number of public JTAG instructions. These instructions are
described in the sections below.
34.5.2.1 IDCODE
This instruction selects the 32 bit Device Identification register (DID) as Data Register. The DID
register consists of a version number, a device number, and the manufacturer code chosen by
JEDEC. This is the default instruction after a JTAG reset. Details about the DID register can be
found in the module configuration section at the end of this chapter.
Starting in Run-Test/Idle, the Device Identification register is accessed in the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
5. Select the DR Scan path.
6. In Capture-DR: The IDCODE value is latched into the shift register.
7. In Shift-DR: The IDCODE scan chain is shifted by the TCK input.
8. Return to Run-Test/Idle.
34.5.2.2 SAMPLE_PRELOAD
This instruction takes a snap-shot of the input/output pins without affecting the system operation,
and pre-loading the scan chain without updating the DR-latch. The boundary-scan chain is
selected as Data Register.
Starting in Run-Test/Idle, the Device Identification register is accessed in the following way:
DR Size Shows the number of bits in the data register chain when this instruction is active.
Example: 34 bits
DR input value
Shows which bit pattern to shift into the data register in the Shift-DR state when this
instruction is active. Multiple such lines may exist, e.g., to distinguish between
reads and writes.
Example: aaaaaaar xxxxxxxx xxxxxxxx xxxxxxxx xx
DR output value
Shows the bit pattern shifted out of the data register in the Shift-DR state when this
instruction is active. Multiple such lines may exist, e.g., to distinguish between
reads and writes.
Example: xx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxeb
Table 34-10. Instruction Description (Continued)
Instruction Description
Table 34-11. IDCODE Details
Instructions Details
IR input value 00001 (0x01)
IR output value p0001
DR Size 32
DR input value xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx
DR output value Device Identification Register
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1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
5. Select the DR Scan path.
6. In Capture-DR: The Data on the external pins are sampled into the boundary-scan
chain.
7. In Shift-DR: The boundary-scan chain is shifted by the TCK input.
8. Return to Run-Test/Idle.
34.5.2.3 EXTEST
This instruction selects the boundary-scan chain as Data Register for testing circuitry external to
the 32-bit AVR package. The contents of the latched outputs of the boundary-scan chain is
driven out as soon as the JTAG IR-register is loaded with the EXTEST instruction.
Starting in Run-Test/Idle, the EXTEST instruction is accessed the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. In Update-IR: The data from the boundary-scan chain is applied to the output pins.
5. Return to Run-Test/Idle.
6. Select the DR Scan path.
7. In Capture-DR: The data on the external pins is sampled into the boundary-scan chain.
8. In Shift-DR: The boundary-scan chain is shifted by the TCK input.
9. In Update-DR: The data from the scan chain is applied to the output pins.
10. Return to Run-Test/Idle.
Table 34-12. SAMPLE_PRELOAD Details
Instructions Details
IR input value 00010 (0x02)
IR output value p0001
DR Size Depending on boundary-scan chain, see BSDL-file.
DR input value Depending on boundary-scan chain, see BSDL-file.
DR output value Depending on boundary-scan chain, see BSDL-file.
Table 34-13. EXTEST Details
Instructions Details
IR input value 00011 (0x03)
IR output value p0001
DR Size Depending on boundary-scan chain, see BSDL-file.
DR input value Depending on boundary-scan chain, see BSDL-file.
DR output value Depending on boundary-scan chain, see BSDL-file.
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34.5.2.4 INTEST
This instruction selects the boundary-scan chain as Data Register for testing internal logic in the
device. The logic inputs are determined by the boundary-scan chain, and the logic outputs are
captured by the boundary-scan chain. The device output pins are driven from the boundary-scan
chain.
Starting in Run-Test/Idle, the INTEST instruction is accessed the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. In Update-IR: The data from the boundary-scan chain is applied to the internal logic
inputs.
5. Return to Run-Test/Idle.
6. Select the DR Scan path.
7. In Capture-DR: The data on the internal logic is sampled into the boundary-scan chain.
8. In Shift-DR: The boundary-scan chain is shifted by the TCK input.
9. In Update-DR: The data from the boundary-scan chain is applied to internal logic
inputs.
10. Return to Run-Test/Idle.
34.5.2.5 CLAMP
This instruction selects the Bypass register as Data Register. The device output pins are driven
from the boundary-scan chain.
Starting in Run-Test/Idle, the CLAMP instruction is accessed the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. In Update-IR: The data from the boundary-scan chain is applied to the output pins.
5. Return to Run-Test/Idle.
6. Select the DR Scan path.
7. In Capture-DR: A logic ‘0’ is loaded into the Bypass Register.
8. In Shift-DR: Data is scanned from TDI to TDO through the Bypass register.
Table 34-14. INTEST Details
Instructions Details
IR input value 00100 (0x04)
IR output value p0001
DR Size Depending on boundary-scan chain, see BSDL-file.
DR input value Depending on boundary-scan chain, see BSDL-file.
DR output value Depending on boundary-scan chain, see BSDL-file.
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9. Return to Run-Test/Idle.
34.5.2.6 BYPASS
This instruction selects the 1-bit Bypass Register as Data Register.
Starting in Run-Test/Idle, the CLAMP instruction is accessed the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
5. Select the DR Scan path.
6. In Capture-DR: A logic ‘0’ is loaded into the Bypass Register.
7. In Shift-DR: Data is scanned from TDI to TDO through the Bypass register.
8. Return to Run-Test/Idle.
34.5.3 Private JTAG Instructions
The 32-bit AVR defines a number of private JTAG instructions, not defined by the JTAG standard.
Each instruction is briefly described in text, with details following in table form.
34.5.3.1 NEXUS_ACCESS
This instruction allows Nexus-compliant access to the On-Chip Debug registers through the
SAB. The 7-bit register index, a read/write control bit, and the 32-bit data is accessed through
the JTAG port.
The data register is alternately interpreted by the SAB as an address register and a data register.
The SAB starts in address mode after the NEXUS_ACCESS instruction is selected, and
toggles between address and data mode each time a data scan completes with the busy bit
cleared.
NOTE: The polarity of the direction bit is inverse of the Nexus standard.
Table 34-15. CLAMP Details
Instructions Details
IR input value 00110 (0x06)
IR output value p0001
DR Size 1
DR input value x
DR output value x
Table 34-16. BYPASS Details
Instructions Details
IR input value 11111 (0x1F)
IR output value p0001
DR Size 1
DR input value x
DR output value x
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Starting in Run-Test/Idle, OCD registers are accessed in the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
5. Select the DR Scan path.
6. In Shift-DR: Scan in the direction bit (1=read, 0=write) and the 7-bit address for the
OCD register.
7. Go to Update-DR and re-enter Select-DR Scan.
8. In Shift-DR: For a read operation, scan out the contents of the addressed register. For a
write operation, scan in the new contents of the register.
9. Return to Run-Test/Idle.
For any operation, the full 7 bits of the address must be provided. For write operations, 32 data
bits must be provided, or the result will be undefined. For read operations, shifting may be terminated
once the required number of bits have been acquired.
34.5.3.2 MEMORY_SERVICE
This instruction allows access to registers in an optional Memory Service Unit. The 7-bit register
index, a read/write control bit, and the 32-bit data is accessed through the JTAG port.
The data register is alternately interpreted by the SAB as an address register and a data register.
The SAB starts in address mode after the MEMORY_SERVICE instruction is selected, and
toggles between address and data mode each time a data scan completes with the busy bit
cleared.
Starting in Run-Test/Idle, Memory Service registers are accessed in the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
5. Select the DR Scan path.
6. In Shift-DR: Scan in the direction bit (1=read, 0=write) and the 7-bit address for the
Memory Service register.
Table 34-17. NEXUS_ACCESS Details
Instructions Details
IR input value 10000 (0x10)
IR output value peb01
DR Size 34 bits
DR input value (Address phase) aaaaaaar xxxxxxxx xxxxxxxx xxxxxxxx xx
DR input value (Data read phase) xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xx
DR input value (Data write phase) dddddddd dddddddd dddddddd dddddddd xx
DR output value (Address phase) xx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxeb
DR output value (Data read phase) eb dddddddd dddddddd dddddddd dddddddd
DR output value (Data write phase) xx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxeb
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7. Go to Update-DR and re-enter Select-DR Scan.
8. In Shift-DR: For a read operation, scan out the contents of the addressed register. For a
write operation, scan in the new contents of the register.
9. Return to Run-Test/Idle.
For any operation, the full 7 bits of the address must be provided. For write operations, 32 data
bits must be provided, or the result will be undefined. For read operations, shifting may be terminated
once the required number of bits have been acquired.
34.5.3.3 MEMORY_SIZED_ACCESS
This instruction allows access to the entire Service Access Bus data area. Data is accessed
through a 36-bit byte index, a 2-bit size, a direction bit, and 8, 16, or 32 bits of data. Not all units
mapped on the SAB bus may support all sizes of accesses, e.g., some may only support word
accesses.
The data register is alternately interpreted by the SAB as an address register and a data register.
The SAB starts in address mode after the MEMORY_SIZED_ACCESS instruction is
selected, and toggles between address and data mode each time a data scan completes with
the busy bit cleared.
Table 34-18. MEMORY_SERVICE Details
Instructions Details
IR input value 10100 (0x14)
IR output value peb01
DR Size 34 bits
DR input value (Address phase) aaaaaaar xxxxxxxx xxxxxxxx xxxxxxxx xx
DR input value (Data read phase) xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xx
DR input value (Data write phase) dddddddd dddddddd dddddddd dddddddd xx
DR output value (Address phase) xx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxeb
DR output value (Data read phase) eb dddddddd dddddddd dddddddd dddddddd
DR output value (Data write phase) xx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxeb
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The size field is encoded as i Table 34-19.
Starting in Run-Test/Idle, SAB data is accessed in the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
5. Select the DR Scan path.
6. In Shift-DR: Scan in the direction bit (1=read, 0=write), 2-bit access size, and the 36-bit
address of the data to access.
7. Go to Update-DR and re-enter Select-DR Scan.
8. In Shift-DR: For a read operation, scan out the contents of the addressed area. For a
write operation, scan in the new contents of the area.
9. Return to Run-Test/Idle.
For any operation, the full 36 bits of the address must be provided. For write operations, 32 data
bits must be provided, or the result will be undefined. For read operations, shifting may be terminated
once the required number of bits have been acquired.
Table 34-19. Size Field Semantics
Size field value Access size Data alignment
00 Byte (8 bits)
Address modulo 4 : data alignment
0: dddddddd xxxxxxxx xxxxxxxx xxxxxxxx
1: xxxxxxxx dddddddd xxxxxxxx xxxxxxxx
2: xxxxxxxx xxxxxxxx dddddddd xxxxxxxx
3: xxxxxxxx xxxxxxxx xxxxxxxx dddddddd
01 Halfword (16 bits)
Address modulo 4 : data alignment
0: dddddddd dddddddd xxxxxxxx xxxxxxxx
1: Not allowed
2: xxxxxxxx xxxxxxxx dddddddd dddddddd
3: Not allowed
10 Word (32 bits)
Address modulo 4 : data alignment
0: dddddddd dddddddd dddddddd dddddddd
1: Not allowed
2: Not allowed
3: Not allowed
11 Reserved N/A
Table 34-20. MEMORY_SIZED_ACCESS Details
Instructions Details
IR input value 10101 (0x15)
IR output value peb01
DR Size 39 bits
DR input value (Address phase) aaaaaaaa aaaaaaaa aaaaaaaa aaaaaaaa aaaassr
DR input value (Data read phase) xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxx
DR input value (Data write phase) dddddddd dddddddd dddddddd dddddddd xxxxxxx
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34.5.3.4 MEMORY_WORD_ACCESS
This instruction allows access to the entire Service Access Bus data area. Data is accessed
through the 34 MSB of the SAB address, a direction bit, and 32 bits of data. This instruction is
identical to MEMORY_SIZED_ACCESS except that it always does word sized accesses. The
size field is implied, and the two lowest address bits are removed and not scanned in.
Note: This instruction was previously known as MEMORY_ACCESS, and is provided for backwards
compatibility.
The data register is alternately interpreted by the SAB as an address register and a data register.
The SAB starts in address mode after the MEMORY_WORD_ACCESS instruction is
selected, and toggles between address and data mode each time a data scan completes with
the busy bit cleared.
Starting in Run-Test/Idle, SAB data is accessed in the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
5. Select the DR Scan path.
6. In Shift-DR: Scan in the direction bit (1=read, 0=write) and the 34-bit address of the
data to access.
7. Go to Update-DR and re-enter Select-DR Scan.
8. In Shift-DR: For a read operation, scan out the contents of the addressed area. For a
write operation, scan in the new contents of the area.
9. Return to Run-Test/Idle.
For any operation, the full 34 bits of the address must be provided. For write operations, 32 data
bits must be provided, or the result will be undefined. For read operations, shifting may be terminated
once the required number of bits have been acquired.
DR output value (Address phase) xxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxeb
DR output value (Data read phase) xxxxxeb dddddddd dddddddd dddddddd dddddddd
DR output value (Data write phase) xxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxeb
Table 34-20. MEMORY_SIZED_ACCESS Details (Continued)
Instructions Details
Table 34-21. MEMORY_WORD_ACCESS Details
Instructions Details
IR input value 10001 (0x11)
IR output value peb01
DR Size 35 bits
DR input value (Address phase) aaaaaaaa aaaaaaaa aaaaaaaa aaaaaaaa aar
DR input value (Data read phase) xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxx
DR input value (Data write phase) dddddddd dddddddd dddddddd dddddddd xxx
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34.5.3.5 MEMORY_BLOCK_ACCESS
This instruction allows access to the entire SAB data area. Up to 32 bits of data is accessed at a
time, while the address is sequentially incremented from the previously used address.
In this mode, the SAB address, size, and access direction is not provided with each access.
Instead, the previous address is auto-incremented depending on the specified size and the previous
operation repeated. The address must be set up in advance with
MEMORY_SIZE_ACCESS or MEMORY_WORD_ACCESS. It is allowed, but not required, to
shift data after shifting the address.
This instruction is primarily intended to speed up large quantities of sequential word accesses. It
is possible to use it also for byte and halfword accesses, but the overhead in this is case much
larger as 32 bits must still be shifted for each access.
The following sequence should be used:
1. Use the MEMORY_SIZE_ACCESS or MEMORY_WORD_ACCESS to read or write the
first location.
2. Return to Run-Test/Idle.
3. Select the IR Scan path.
4. In Capture-IR: The IR output value is latched into the shift register.
5. In Shift-IR: The instruction register is shifted by the TCK input.
6. Return to Run-Test/Idle.
7. Select the DR Scan path. The address will now have incremented by 1, 2, or 4 (corresponding
to the next byte, halfword, or word location).
8. In Shift-DR: For a read operation, scan out the contents of the next addressed location.
For a write operation, scan in the new contents of the next addressed location.
9. Go to Update-DR.
10. If the block access is not complete, return to Select-DR Scan and repeat the access.
11. If the block access is complete, return to Run-Test/Idle.
For write operations, 32 data bits must be provided, or the result will be undefined. For read
operations, shifting may be terminated once the required number of bits have been acquired.
DR output value (Address phase) xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xeb
DR output value (Data read phase) xeb dddddddd dddddddd dddddddd dddddddd
DR output value (Data write phase) xxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxeb
Table 34-21. MEMORY_WORD_ACCESS Details (Continued)
Instructions Details
Table 34-22. MEMORY_BLOCK_ACCESS Details
Instructions Details
IR input value 10010 (0x12)
IR output value peb01
DR Size 34 bits
DR input value (Data read phase) xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xx
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The overhead using block word access is 4 cycles per 32 bits of data, resulting in an 88% transfer
efficiency, or 2.1 MBytes per second with a 20 MHz TCK frequency.
34.5.3.6 CANCEL_ACCESS
If a very slow memory location is accessed during a SAB memory access, it could take a very
long time until the busy bit is cleared, and the SAB becomes ready for the next operation. The
CANCEL_ACCESS instruction provides a possibility to abort an ongoing transfer and report a
timeout to the JTAG master.
When the CANCEL_ACCESS instruction is selected, the current access will be terminated as
soon as possible. There are no guarantees about how long this will take, as the hardware may
not always be able to cancel the access immediately. The SAB is ready to respond to a new
command when the busy bit clears.
Starting in Run-Test/Idle, CANCEL_ACCESS is accessed in the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
34.5.3.7 SYNC
This instruction allows external debuggers and testers to measure the ratio between the external
JTAG clock and the internal system clock. The SYNC data register is a 16-bit counter that
counts down to zero using the internal system clock. The busy bit stays high until the counter
reaches zero.
Starting in Run-Test/Idle, SYNC instruction is used in the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
5. Select the DR Scan path.
DR input value (Data write phase) dddddddd dddddddd dddddddd dddddddd xx
DR output value (Data read phase) eb dddddddd dddddddd dddddddd dddddddd
DR output value (Data write phase) xx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxeb
Table 34-22. MEMORY_BLOCK_ACCESS Details (Continued)
Instructions Details
Table 34-23. CANCEL_ACCESS Details
Instructions Details
IR input value 10011 (0x13)
IR output value peb01
DR Size 1
DR input value x
DR output value 0
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6. Scan in an 16-bit counter value.
7. Go to Update-DR and re-enter Select-DR Scan.
8. In Shift-DR: Scan out the busy bit, and until the busy bit clears goto 7.
9. Calculate an approximation to the internal clock speed using the elapsed time and the
counter value.
10. Return to Run-Test/Idle.
The full 16-bit counter value must be provided when starting the synch operation, or the result
will be undefined. When reading status, shifting may be terminated once the required number of
bits have been acquired.
34.5.3.8 AVR_RESET
This instruction allows a debugger or tester to directly control separate reset domains inside the
chip. The shift register contains one bit for each controllable reset domain. Setting a bit to one
resets that domain and holds it in reset. Setting a bit to zero releases the reset for that domain.
The AVR_RESET instruction can be used in the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
5. Select the DR Scan path.
6. In Shift-DR: Scan in the value corresponding to the reset domains the JTAG master
wants to reset into the data register.
7. Return to Run-Test/Idle.
8. Stay in run test idle for at least 10 TCK clock cycles to let the reset propagate to the
system.
See the device specific documentation for the number of reset domains, and what these
domains are.
For any operation, all bits must be provided or the result will be undefined.
Table 34-24. SYNC_ACCESS Details
Instructions Details
IR input value 10111 (0x17)
IR output value peb01
DR Size 16 bits
DR input value dddddddd dddddddd
DR output value xxxxxxxx xxxxxxeb
Table 34-25. AVR_RESET Details
Instructions Details
IR input value 01100 (0x0C)
IR output value p0001
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34.5.3.9 CHIP_ERASE
This instruction allows a programmer to completely erase all nonvolatile memories in a chip.
This will also clear any security bits that are set, so the device can be accessed normally. In
devices without non-volatile memories this instruction does nothing, and appears to complete
immediately.
The erasing of non-volatile memories starts as soon as the CHIP_ERASE instruction is selected.
The CHIP_ERASE instruction selects a 1 bit bypass data register.
A chip erase operation should be performed as:
1. Reset the system and stop the CPU from executing.
2. Select the IR Scan path.
3. In Capture-IR: The IR output value is latched into the shift register.
4. In Shift-IR: The instruction register is shifted by the TCK input.
5. Check the busy bit that was scanned out during Shift-IR. If the busy bit was set goto 2.
6. Return to Run-Test/Idle.
34.5.3.10 HALT
This instruction allows a programmer to easily stop the CPU to ensure that it does not execute
invalid code during programming.
This instruction selects a 1-bit halt register. Setting this bit to one halts the CPU. Setting this bit
to zero releases the CPU to run normally. The value shifted out from the data register is one if
the CPU is halted. Before releasing the halt command the CPU needs to be reset to ensure that
it will start at the reset startup address.
The HALT instruction can be used in the following way:
1. Select the IR Scan path.
2. In Capture-IR: The IR output value is latched into the shift register.
3. In Shift-IR: The instruction register is shifted by the TCK input.
4. Return to Run-Test/Idle.
5. Select the DR Scan path.
DR Size Device specific.
DR input value Device specific.
DR output value Device specific.
Table 34-25. AVR_RESET Details (Continued)
Instructions Details
Table 34-26. CHIP_ERASE Details
Instructions Details
IR input value 01111 (0x0F)
IR output value p0b01
Where b is the busy bit.
DR Size 1 bit
DR input value x
DR output value 0
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6. In Shift-DR: Scan in the value 1 to halt the CPU, 0 to start CPU execution.
7. Return to Run-Test/Idle.
Table 34-27. HALT Details
Instructions Details
IR input value 11100 (0x1C)
IR output value p0001
DR Size 1 bit
DR input value d
DR output value d
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34.5.4 JTAG Data Registers
The following device specific registers can be selected as JTAG scan chain depending on the
instruction loaded in the JTAG Instruction Register. Additional registers exist, but are implicitly
described in the functional description of the relevant instructions.
34.5.4.1 Device Identification Register
The Device Identification Register contains a unique identifier for each product. The register is
selected by the IDCODE instruction, which is the default instruction after a JTAG reset.
Device specific ID codes
The different device configurations have different JTAG ID codes, as shown in Table 34-28.
Note that if the flash controller is statically reset, the ID code will be undefined.
34.5.4.2 Reset Register
The reset register is selected by the AVR_RESET instruction and contains one bit for each reset
domain in the device. Setting each bit to one will keep that domain reset until the bit is cleared.
MSB LSB
Bit 31 28 27 12 11 1 0
Device ID Revision Part Number Manufacturer ID 1
4 bits 16 bits 11 bits 1 bit
Revision This is a 4 bit number identifying the revision of the component.
Rev A = 0x0, B = 0x1, etc.
Part Number The part number is a 16 bit code identifying the component.
Manufacturer ID The Manufacturer ID is a 11 bit code identifying the manufacturer.
The JTAG manufacturer ID for ATMEL is 0x01F.
Table 34-28. Device and JTAG ID
Device Name JTAG ID Code (R is the revision number)
ATUC256L3U 0xr21C303F
ATUC128L3U 0xr21C403F
ATUC64L3U 0xr21C503F
ATUC256L4U 0xr21C603F
ATUC128L4U 0xr21C703F
ATUC64L4U 0xr21C803F
Bit 0
Reset
domain System
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34.5.4.3 Boundary--scan Chain
The boundary-scan chain has the capability of driving and observing the logic levels on the digital
I/O pins, as well as driving and observing the logic levels between the digital I/O pins and the
internal logic. Typically, output value, output enable, and input data are all available in the
boundary-scan chain.
The boundary-scan chain is described in the BSDL (Boundary Scan Description Language) file
available at the Atmel web site.
System Resets the whole chip, except the JTAG itself.
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34.6 aWire Debug Interface (AW)
Rev.: 2.3.0.1
34.6.1 Features
• Single pin debug system.
• Half Duplex asynchronous communication (UART compatible).
• Full duplex mode for direct UART connection.
• Compatible with JTAG functionality, except boundary scan.
• Failsafe packet-oriented protocol.
• Read and write on-chip memory and program on-chip flash and fuses through SAB interface.
• On-Chip Debug access through SAB interface.
• Asynchronous receiver or transmitter when the aWire system is not used for debugging.
34.6.2 Overview
The aWire Debug Interface (AW) offers a single pin debug solution that is fully compatible with
the functionality offered by the JTAG interface, except boundary scan. This functionality includes
memory access, programming capabilities, and On-Chip Debug access.
Figure 34-8 on page 881 shows how the AW is connected in a 32-bit AVR device. The
RESET_N pin is used both as reset and debug pin. A special sequence on RESET_N is needed
to block the normal reset functionality and enable the AW.
The Service Access Bus (SAB) interface contains address and data registers for the Service
Access Bus, which gives access to On-Chip Debug, programming, and other functions in the
device. The SAB offers several modes of access to the address and data registers, as discussed
in Section 34.6.6.8.
Section 34.6.7 lists the supported aWire commands and responses, with references to the
description in this document.
If the AW is not used for debugging, the aWire UART can be used by the user to send or receive
data with one stop bit, eight data bits, no parity bits, and one stop bit. This can be controlled
through the aWire user interface.
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34.6.3 Block Diagram
Figure 34-8. aWire Debug Interface Block Diagram
34.6.4 I/O Lines Description
34.6.5 Product Dependencies
In order to use this module, other parts of the system must be configured correctly, as described
below.
Table 34-29. I/O Lines Description
Name Description Type
DATA aWire data multiplexed with the RESET_N pin. Input/Output
DATAOUT aWire data output in 2-pin mode. Output
UART
Reset
filter
External reset
AW_ENABLE
RESET_N
Baudrate Detector
RW SZ ADDR DATA
CRC
AW CONTROL
AW User Interface
SAB interface
RESET command
Power
Manager
HALT command CPU
Flash
Controller CHIP_ERASE command
aWire Debug Interface
PB
SAB
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34.6.5.1 I/O Lines
The pin used by AW is multiplexed with the RESET_N pin. The reset functionality is the default
function of this pin. To enable the aWire functionality on the RESET_N pin the user must enable
the AW either by sending the enable sequence over the RESET_N pin from an external aWire
master or by enabling the aWire user interface.
In 2-pin mode data is received on the RESET_N line, but transmitted on the DATAOUT line.
After sending the 2_PIN_MODE command the DATAOUT line is automatically enabled. All other
peripheral functions on this pin is disabled.
34.6.5.2 Power Management
When debugging through AW the system clocks are automatically turned on to allow debugging
in sleep modes.
34.6.5.3 Clocks
The aWire UART uses the internal 120 MHz RC oscillator (RC120M) as clock source for its
operation. When enabling the AW the RC120M is automatically started.
34.6.5.4 External Components
The AW needs an external pullup on the RESET_N pin to ensure that the pin is pulled up when
the bus is not driven.
34.6.6 Functional Description
34.6.6.1 aWire Communication Protocol
The AW is accessed through the RESET_N pin shown in Table 34-29 on page 881. The AW
communicates through a UART operating at variable baud rate (depending on a sync pattern)
with one start bit, 8 data bits (LSB first), one stop bit, and no parity bits. The aWire protocol is
based upon command packets from an externalmaster and response packets from the slave
(AW). The master always initiates communication and decides the baud rate.
The packet contains a sync byte (0x55), a command/response byte, two length bytes (optional),
a number of data bytes as defined in the length field (optional), and two CRC bytes. If the command/response
has the most significant bit set, the command/response also carries the optional
length and data fields. The CRC field is not checked if the CRC value transmitted is 0x0000.
Table 34-30. aWire Packet Format
Field Number of bytes Description Comment Optional
SYNC 1 Sync pattern (0x55). Used by the receiver to set the baud rate
clock. No
COMMAND/
RESPONSE 1 Command from the master or
response from the slave.
When the most significant bit is set the
command/response has a length field. A
response has the next most significant bit
set. A command does not have this bit set.
No
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CRC calculation
The CRC is calculated from the command/response, length, and data fields. The polynomial
used is the FCS16 (or CRC-16-CCIT) in reverse mode (0x8408) and the starting value is
0x0000.
Example command
Below is an example command from the master with additional data.
Figure 34-9. Example Command
Example response
Below is an example response from the slave with additional data.
Figure 34-10. Example Response
LENGTH 2 The number of bytes in the DATA
field. Yes
DATA LENGTH Data according to command/
response.
Yes
CRC 2 CRC calculated with the FCS16
polynomial.
CRC value of 0x0000 makes the aWire
disregard the CRC if the master does not
support it.
No
Table 34-30. aWire Packet Format
Field Number of bytes Description Comment Optional
baud_rate_clk
data_pin ...
field sync(0x55) command(0x81) length(MSB) length(lsb)
...
data(MSB) data(LSB) CRC(MSB) CRC(lsb)
baud_rate_clk
data_pin ...
field sync(0x55) response(0xC1) length(MSB) length(lsb)
...
data(MSB) data(LSB) CRC(MSB) CRC(lsb)
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Avoiding drive contention when changing direction
The aWire debug protocol uses one dataline in both directions. To avoid both the master and the
slave to drive this line when changing direction the AW has a built in guard time before it starts to
drive the line. At reset this guard time is set to maximum (128 bit cycles), but can be lowered by
the master upon command.
The AW will release the line immediately after the stop character has been transmitted.
During the direction change there can be a period when the line is not driven. An external pullup
has to be added to RESET_N to keep the signal stable when neither master or slave is actively
driving the line.
34.6.6.2 The RESET_N pin
Normal reset functionality on the RESET_N pin is disabled when using aWire. However, the
user can reset the system through the RESET aWire command. During aWire operation the
RESET_N pin should not be connected to an external reset circuitry, but disconnected via a
switch or a jumper to avoid drive contention and speed problems.
Figure 34-11. Reset Circuitry and aWire.
34.6.6.3 Initializing the AW
To enable AW, the user has to send a 0x55 pattern with a baudrate of 1 kHz on the RESET_N
pin. The AW is enabled after transmitting this pattern and the user can start transmitting commands.
This pattern is not the sync pattern for the first command.
After enabling the aWire debug interface the halt bit is set automatically to prevent the system
from running code after the interface is enabled. To make the CPU run again set halt to zero
using the HALT command.
34.6.6.4 Disabling the AW
To disable AW, the user can keep the RESET_N pin low for 100 ms. This will disable the AW,
return RESET_N to its normal function, and reset the device.
An aWire master can also disable aWire by sending the DISABLE command. After acking the
command the AW will be disabled and RESET_N returns to its normal function.
RESET_N
AW Debug
Interface
Jumper
MCU
Power Manager
aWire master connector
Board Reset
Circuitry
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34.6.6.5 Resetting the AW
The aWire master can reset the AW slave by pulling the RESET_N pin low for 20 ms. This is
equivalent to disabling and then enabling AW.
34.6.6.6 2-pin Mode
To avoid using special hardware when using a normal UART device as aWire master, the aWire
slave has a 2-pin mode where one pin is used as input and on pin is used as output. To enable
this mode the 2_PIN_MODE command must be sent. After sending the command, all responses
will be sent on the DATAOUT pin instead of the RESET_N pin. Commands are still received on
the RESET_N pin.
34.6.6.7 Baud Rate Clock
The communication speed is set by the master in the sync field of the command. The AW will
use this to resynchronize its baud rate clock and reply on this frequency. The minimum frequency
of the communication is 1 kHz. The maximum frequency depends on the internal clock
source for the AW (RC120M). The baud rate clock is generated by AW with the following
formula:
Where is the baud rate frequency and is the frequency of the internal RC120M. TUNE is
the value returned by the BAUD_RATE response.
To find the max frequency the user can issue the TUNE command to the AW to make it return
the TUNE value. This value can be used to compute the . The maximum operational frequency
( ) is then:
34.6.6.8 Service Access Bus
The AVR32 architecture offers a common interface for access to On-Chip Debug, programming,
and test functions. These are mapped on a common bus called the Service Access Bus (SAB),
which is linked to the aWire through a bus master module, which also handles synchronization
between the aWire and SAB clocks.
For more information about the SAB and a list of SAB slaves see the Service Access Bus
chapter.
SAB Clock
When accessing the SAB through the aWire there are no limitations on baud rate frequency
compared to chip frequency, although there must be an active system clock in order for the SAB
accesses to complete. If the system clock (CLK_SYS) is switched off in sleep mode, activity on
the aWire pin will restart the CLK_SYS automatically, without waking the device from sleep.
aWire masters may optimize the transfer rate by adjusting the baud rate frequency in relation to
the CLK_SYS. This ratio can be measured with the MEMORY_SPEED_REQUEST command.
When issuing the MEMORY_SPEED_REQUEST command a counter value CV is returned. CV
can be used to calculate the SAB speed ( ) using this formula:
f
aw
TUNE f br
8 = ----------------------------
f
br f
aw
f
aw
f
brmax
f
brmax
f
aw
4 = -------
f
sab
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SAB Address Mode
The Service Access Bus uses 36 address bits to address memory or registers in any of the
slaves on the bus. The bus supports sized accesses of bytes (8 bits), halfwords (16 bits), or
words (32 bits). All accesses must be aligned to the size of the access, i.e. halfword accesses
must have the lowest address bit cleared, and word accesses must have the two lowest address
bits cleared.
Two instructions exist to access the SAB: MEMORY_WRITE and MEMORY_READ. These two
instructions write and read words, halfwords, and bytes from the SAB.
Busy Reporting
If the aWire master, during a MEMORY_WRITE or a MEMORY_READ command, transmit
another byte when the aWire is still busy sending the previous byte to the SAB, the AW will
respond with a MEMORY_READ_WRITE_STATUS error. See chapter Section 34.6.8.5 for
more details.
The aWire master should adjust its baudrate or delay between bytes when doing SAB accesses
to ensure that the SAB is not overwhelmed with data.
Error Reporting
If a write is performed on a non-existing memory location the SAB interface will respond with an
error. If this happens, all further writes in this command will not be performed and the error and
number of bytes written is reported in the MEMORY_READWRITE_STATUS message from the
AW after the write.
If a read is performed on a non-existing memory location, the SAB interface will respond with an
error. If this happens, the data bytes read after this event are not valid. The AW will include three
extra bytes at the end of the transfer to indicate if the transfer was successful, or in the case of
an error, how many valid bytes were received.
34.6.6.9 CRC Errors/NACK Response
The AW will calculate a CRC value when receiving the command, length, and data fields of the
command packets. If this value differs from the value from the CRC field of the packet, the AW
will reply with a NACK response. Otherwise the command is carried out normally.
An unknown command will be replied with a NACK response.
In worst case a transmission error can happen in the length or command field of the packet. This
can lead to the aWire slave trying to receive a command with or without length (opposite of what
the master intended) or receive an incorrect number of bytes. The aWire slave will then either
wait for more data when the master has finished or already have transmitted the NACK
response in congestion with the master. The master can implement a timeout on every command
and reset the slave if no response is returned after the timeout period has ended.
f
sab
3f
aw
CV – 3 = ----------------
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34.6.7 aWire Command Summary
The implemented aWire commands are shown in the table below. The responses from the AW
are listed in Section 34.6.8.
All aWire commands are described below, with a summary in table form.
34.6.7.1 AYA
This command asks the AW: “Are you alive”, where the AW should respond with an
acknowledge.
Table 34-31. aWire Command Summary
COMMAND Instruction Description
0x01 AYA “Are you alive”.
0x02 JTAG_ID Asks AW to return the JTAG IDCODE.
0x03 STATUS_REQUEST Request a status message from the AW.
0x04 TUNE Tell the AW to report the current baud rate.
0x05 MEMORY_SPEED_REQUEST Reports the speed difference between the aWire control and the SAB clock
domains.
0x06 CHIP_ERASE Erases the flash and all volatile memories.
0x07 DISABLE Disables the AW.
0x08 2_PIN_MODE Enables the DATAOUT pin and puts the aWire in 2-pin mode, where all
responses are sent on the DATAOUT pin.
0x80 MEMORY_WRITE Writes words, halfwords, or bytes to the SAB.
0x81 MEMORY_READ Reads words, halfwords, or bytes from the SAB.
0x82 HALT Issues a halt command to the device.
0x83 RESET Issues a reset to the Reset Controller.
0x84 SET_GUARD_TIME Sets the guard time for the AW.
Table 34-32. Command/Response Description Notation
Command/Response Description
Command/Response value Shows the command/response value to put into the command/response field of the packet.
Additional data Shows the format of the optional data field if applicable.
Possible responses Shows the possible responses for this command.
Table 34-33. AYA Details
Command Details
Command value 0x01
Additional data N/A
Possible responses 0x40: ACK (Section 34.6.8.1)
0x41: NACK (Section 34.6.8.2)
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34.6.7.2 JTAG_ID
This command instructs the AW to output the JTAG idcode in the following response.
34.6.7.3 STATUS_REQUEST
Asks the AW for a status message.
34.6.7.4 TUNE
Asks the AW for the current baud rate counter value.
34.6.7.5 MEMORY_SPEED_REQUEST
Asks the AW for the relative speed between the aWire clock (RC120M) and the SAB interface.
34.6.7.6 CHIP_ERASE
This instruction allows a programmer to completely erase all nonvolatile memories in the chip.
This will also clear any security bits that are set, so the device can be accessed normally. The
command is acked immediately, but the status of the command can be monitored by checking
Table 34-34. JTAG_ID Details
Command Details
Command value 0x02
Additional data N/A
Possible responses 0xC0: IDCODE (Section 34.6.8.3)
0x41: NACK (Section 34.6.8.2)
Table 34-35. STATUS_REQUEST Details
Command Details
Command value 0x03
Additional data N/A
Possible responses 0xC4: STATUS_INFO (Section 34.6.8.7)
0x41: NACK (Section 34.6.8.2)
Table 34-36. TUNE Details
Command Details
Command value 0x04
Additional data N/A
Possible responses 0xC3: BAUD_RATE (Section 34.6.8.6)
0x41: NACK (Section 34.6.8.2)
Table 34-37. MEMORY_SPEED_REQUEST Details
Command Details
Command value 0x05
Additional data N/A
Possible responses 0xC5: MEMORY_SPEED (Section 34.6.8.8)
0x41: NACK (Section 34.6.8.2)
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the Chip Erase ongoing bit in the status bytes received after the STATUS_REQUEST
command.
34.6.7.7 DISABLE
Disables the AW. The AW will respond with an ACK response and then disable itself.
34.6.7.8 2_PIN_MODE
Enables the DATAOUT pin as an output pin. All responses sent from the aWire slave will be sent
on this pin, instead of the RESET_N pin, starting with the ACK for the 2_PIN_MODE command.
34.6.7.9 MEMORY_WRITE
This command enables programming of memory/writing to registers on the SAB. The
MEMORY_WRITE command allows words, halfwords, and bytes to be programmed to a continuous
sequence of addresses in one operation. Before transferring the data, the user must
supply:
1. The number of data bytes to write + 5 (size and starting address) in the length field.
2. The size of the transfer: words, halfwords, or bytes.
3. The starting address of the transfer.
Table 34-38. CHIP_ERASE Details
Command Details
Command value 0x06
Additional data N/A
Possible responses 0x40: ACK (Section 34.6.8.1)
0x41: NACK (Section 34.6.8.2)
Table 34-39. DISABLE Details
Command Details
Command value 0x07
Additional data N/A
Possible responses 0x40: ACK (Section 34.6.8.1)
0x41: NACK (Section 34.6.8.2)
Table 34-40. DISABLE Details
Command Details
Command value 0x07
Additional data N/A
Possible responses 0x40: ACK (Section 34.6.8.1)
0x41: NACK (Section 34.6.8.2)
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The 4 MSB of the 36 bit SAB address are submitted together with the size field (2 bits). Then follows
the 4 remaining address bytes and finally the data bytes. The size of the transfer is
specified using the values from the following table:
Below is an example write command:
1. 0x55 (sync)
2. 0x80 (command)
3. 0x00 (length MSB)
4. 0x09 (length LSB)
5. 0x25 (size and address MSB, the two MSB of this byte are unused and set to zero)
6. 0x00
7. 0x00
8. 0x00
9. 0x04 (address LSB)
10. 0xCA
11. 0xFE
12. 0xBA
13. 0xBE
14. 0xXX (CRC MSB)
15. 0xXX (CRC LSB)
The length field is set to 0x0009 because there are 9 bytes of additional data: 5 address and size
bytes and 4 bytes of data. The address and size field indicates that words should be written to
address 0x500000004. The data written to 0x500000004 is 0xCAFEBABE.
34.6.7.10 MEMORY_READ
This command enables reading of memory/registers on the Service Access Bus (SAB). The
MEMORY_READ command allows words, halfwords, and bytes to be read from a continuous
sequence of addresses in one operation. The user must supply:
Table 34-41. Size Field Decoding
Size field Description
00 Byte transfer
01 Halfword transfer
10 Word transfer
11 Reserved
Table 34-42. MEMORY_WRITE Details
Command Details
Command value 0x80
Additional data Size, Address and Data
Possible responses 0xC2: MEMORY_READWRITE_STATUS (Section 34.6.8.5)
0x41: NACK (Section 34.6.8.2)
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1. The size of the data field: 7 (size and starting address + read length indicator) in the
length field.
2. The size of the transfer: Words, halfwords, or bytes.
3. The starting address of the transfer.
4. The number of bytes to read (max 65532).
The 4 MSB of the 36 bit SAB address are submitted together with the size field (2 bits). The 4
remaining address bytes are submitted before the number of bytes to read. The size of the
transfer is specified using the values from the following table:
Below is an example read command:
1. 0x55 (sync)
2. 0x81 (command)
3. 0x00 (length MSB)
4. 0x07 (length LSB)
5. 0x25 (size and address MSB, the two MSB of this byte are unused and set to zero)
6. 0x00
7. 0x00
8. 0x00
9. 0x04 (address LSB)
10. 0x00
11. 0x04
12. 0xXX (CRC MSB)
13. 0xXX (CRC LSB)
The length field is set to 0x0007 because there are 7 bytes of additional data: 5 bytes of address
and size and 2 bytes with the number of bytes to read. The address and size field indicates one
word (four bytes) should be read from address 0x500000004.
Table 34-43. Size Field Decoding
Size field Description
00 Byte transfer
01 Halfword transfer
10 Word transfer
11 Reserved
Table 34-44. MEMORY_READ Details
Command Details
Command value 0x81
Additional data Size, Address and Length
Possible responses
0xC1: MEMDATA (Section 34.6.8.4)
0xC2: MEMORY_READWRITE_STATUS (Section 34.6.8.5)
0x41: NACK (Section 34.6.8.2)
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34.6.7.11 HALT
This command tells the CPU to halt code execution for safe programming. If the CPU is not
halted during programming it can start executing partially loaded programs. To halt the processor,
the aWire master should send 0x01 in the data field of the command. After programming the
halting can be released by sending 0x00 in the data field of the command.
34.6.7.12 RESET
This command resets different domains in the part. The aWire master sends a byte with the
reset value. Each bit in the reset value byte corresponds to a reset domain in the chip. If a bit is
set the reset is activated and if a bit is not set the reset is released. The number of reset domains
and their destinations are identical to the resets described in the JTAG data registers chapter
under reset register.
34.6.7.13 SET_GUARD_TIME
Sets the guard time value in the AW, i.e. how long the AW will wait before starting its transfer
after the master has finished.
The guard time can be either 0x00 (128 bit lengths), 0x01 (16 bit lengths), 0x2 (4 bit lengths) or
0x3 (1 bit length).
Table 34-45. HALT Details
Command Details
Command value 0x82
Additional data 0x01 to halt the CPU 0x00 to release the halt and reset the
device.
Possible responses 0x40: ACK (Section 34.6.8.1)
0x41: NACK (Section 34.6.8.2)
Table 34-46. RESET Details
Command Details
Command value 0x83
Additional data Reset value for each reset domain. The number of reset
domains is part specific.
Possible responses 0x40: ACK (Section 34.6.8.1)
0x41: NACK (Section 34.6.8.2)
Table 34-47. SET_GUARD_TIME Details
Command Details
Command value 0x84
Additional data Guard time
Possible responses 0x40: ACK (Section 34.6.8.1)
0x41: NACK (Section 34.6.8.2)
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34.6.8 aWire Response Summary
The implemented aWire responses are shown in the table below.
34.6.8.1 ACK
The AW has received the command successfully and performed the operation.
34.6.8.2 NACK
The AW has received the command, but got a CRC mismatch.
34.6.8.3 IDCODE
The JTAG idcode for this device.
34.6.8.4 MEMDATA
The data read from the address specified by the MEMORY_READ command. The last 3 bytes
are status bytes from the read. The first status byte is the status of the command described in
the table below. The last 2 bytes are the number of remaining data bytes to be sent in the data
field of the packet when the error occurred. If the read was not successful all data bytes after the
failure are undefined. A successful word read (4 bytes) will look like this:
Table 34-48. aWire Response Summary
RESPONSE Instruction Description
0x40 ACK Acknowledge.
0x41 NACK Not acknowledge. Sent after CRC errors and after unknown commands.
0xC0 IDCODE The JTAG idcode.
0xC1 MEMDATA Values read from memory.
0xC2 MEMORY_READWRITE_STATUS Status after a MEMORY_WRITE or a MEMORY_READ command. OK, busy,
error.
0xC3 BAUD_RATE The current baudrate.
0xC4 STATUS_INFO Status information.
0xC5 MEMORY_SPEED SAB to aWire speed information.
Table 34-49. ACK Details
Response Details
Response value 0x40
Additional data N/A
Table 34-50. NACK Details
Response Details
Response value 0x41
Additional data N/A
Table 34-51. IDCODE Details
Response Details
Response value 0xC0
Additional data JTAG idcode
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1. 0x55 (sync)
2. 0xC1 (command)
3. 0x00 (length MSB)
4. 0x07 (length LSB)
5. 0xCA (Data MSB)
6. 0xFE
7. 0xBA
8. 0xBE (Data LSB)
9. 0x00 (Status byte)
10. 0x00 (Bytes remaining MSB)
11. 0x00 (Bytes remaining LSB)
12. 0xXX (CRC MSB)
13. 0xXX (CRC LSB)
The status is 0x00 and all data read are valid. An unsuccessful four byte read can look like this:
1. 0x55 (sync)
2. 0xC1 (command)
3. 0x00 (length MSB)
4. 0x07 (length LSB)
5. 0xCA (Data MSB)
6. 0xFE
7. 0xXX (An error has occurred. Data read is undefined. 5 bytes remaining of the Data
field)
8. 0xXX (More undefined data)
9. 0x02 (Status byte)
10. 0x00 (Bytes remaining MSB)
11. 0x05 (Bytes remaining LSB)
12. 0xXX (CRC MSB)
13. 0xXX (CRC LSB)
The error occurred after reading 2 bytes on the SAB. The rest of the bytes read are undefined.
The status byte indicates the error and the bytes remaining indicates how many bytes were
remaining to be sent of the data field of the packet when the error occurred.
Table 34-52. MEMDATA Status Byte
status byte Description
0x00 Read successful
0x01 SAB busy
0x02 Bus error (wrong address)
Other Reserved
Table 34-53. MEMDATA Details
Response Details
Response value 0xC1
Additional data Data read, status byte, and byte count (2 bytes)
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34.6.8.5 MEMORY_READWRITE_STATUS
After a MEMORY_WRITE command this response is sent by AW. The response can also be
sent after a MEMORY_READ command if AW encountered an error when receiving the
address. The response contains 3 bytes, where the first is the status of the command and the 2
next contains the byte count when the first error occurred. The first byte is encoded this way:
34.6.8.6 BAUD_RATE
The current baud rate in the AW. See Section 34.6.6.7 for more details.
34.6.8.7 STATUS_INFO
A status message from AW.
Table 34-54. MEMORY_READWRITE_STATUS Status Byte
status byte Description
0x00 Write successful
0x01 SAB busy
0x02 Bus error (wrong address)
Other Reserved
Table 34-55. MEMORY_READWRITE_STATUS Details
Response Details
Response value 0xC2
Additional data Status byte and byte count (2 bytes)
Table 34-56. BAUD_RATE Details
Response Details
Response value 0xC3
Additional data Baud rate
Table 34-57. STATUS_INFO Contents
Bit number Name Description
15-9 Reserved
8 Protected The protection bit in the internal flash is set. SAB access is restricted. This bit
will read as one during reset.
7 SAB busy
The SAB bus is busy with a previous transfer. This could indicate that the CPU
is running on a very slow clock, the CPU clock has stopped for some reason
or that the part is in constant reset.
6 Chip erase ongoing The Chip erase operation has not finished.
5 CPU halted This bit will be set if the CPU is halted. This bit will read as zero during reset.
4-1 Reserved
0 Reset status This bit will be set if AW has reset the CPU using the RESET command.
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34.6.8.8 MEMORY_SPEED
Counts the number of RC120M clock cycles it takes to sync one message to the SAB interface
and back again. The SAB clock speed ( ) can be calculated using the following formula:
34.6.9 Security Restrictions
When the security fuse in the Flash is programmed, the following aWire commands are limited:
• MEMORY_WRITE
• MEMORY_READ
Unlimited access to these instructions is restored when the security fuse is erased by the
CHIP_ERASE aWire command.
Note that the security bit will read as programmed and block these instructions also if the Flash
Controller is statically reset.
Table 34-58. STATUS_INFO Details
Response Details
Response value 0xC4
Additional data 2 status bytes
Table 34-59. MEMORY_SPEED Details
Response Details
Response value 0xC5
Additional data Clock cycle count (MS)
f
sab
f
sab
3f
aw
CV – 3 = ----------------
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35. Electrical Characteristics
35.1 Absolute Maximum Ratings*
Notes: 1. 5V tolerant pins, see Section ”Peripheral Multiplexing on I/O lines” on page 10
2. VVDD corresponds to either VVDDIN or VVDDIO, depending on the supply for the pin. Refer to Section on page 10 for details.
35.2 Supply Characteristics
The following characteristics are applicable to the operating temperature range: TA = -40°C to
85°C, unless otherwise specified and are valid for a junction temperature up to TJ = 100°C.
Please refer to Section 6. ”Supply and Startup Considerations” on page 39.
Table 35-1. Absolute Maximum Ratings
Operating temperature..................................... -40C to +85C *NOTICE: Stresses beyond those listed under
“Absolute Maximum Ratings” may cause
permanent damage to the device. This is
a stress rating only and functional operation
of the device at these or other conditions
beyond those indicated in the
operational sections of this specification is
not implied. Exposure to absolute maximum
rating conditions for extended periods
may affect device reliability.
Storage temperature...................................... -60°C to +150°C
Voltage on input pins (except for 5V pins) with respect to ground
.................................................................-0.3V to VVDD(2)+0.3V
Voltage on 5V tolerant(1) pins with respect to ground ...............
.............................................................................-0.3V to 5.5V
Total DC output current on all I/O pins - VDDIO, 64-pin package
............... ......................................................................141 mA
Total DC output current on all I/O pins - VDDIN, 64-pin package
....................................................................................... 42 mA
Total DC output current on all I/O pins - VDDIO, 48-pin package
........... ...........................................................................120mA
Total DC output current on all I/O pins - VDDIN, 48-pin package
....................................................................................... 39 mA
Maximum operating voltage VDDCORE......................... 1.98V
Maximum operating voltage VDDIO, VDDIN .................... 3.6V
Table 35-2. Supply Characteristics
Symbol Parameter
Voltage
Min Max Unit
VVDDIO DC supply peripheral I/Os 1.62 3.6 V
VVDDIN
DC supply peripheral I/Os, 1.8V
single supply mode 1.62 1.98 V
DC supply peripheral I/Os and
internal regulator, 3.3V supply
mode
1.98 3.6 V
VVDDCORE DC supply core 1.62 1.98 V
VVDDANA Analog supply voltage 1.62 1.98 V
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Note: 1. These values are based on simulation and characterization of other AVR microcontrollers
manufactured in the same process technology. These values are not covered by test limits in
production.
35.3 Maximum Clock Frequencies
These parameters are given in the following conditions:
• VVDDCORE = 1.62V to 1.98V
• Temperature = -40°C to 85°C
35.4 Power Consumption
The values in Table 35-5 are measured values of power consumption under the following conditions,
except where noted:
• Operating conditions, internal core supply (Figure 35-1) - this is the default configuration
– VVDDIN = 3.0V
Table 35-3. Supply Rise Rates and Order(1)
Symbol Parameter
Rise Rate
Min Max Unit Comment
VVDDIO DC supply peripheral I/Os 0 2.5 V/µs
VVDDIN
DC supply peripheral I/Os
and internal regulator 0.002 2.5 V/µs
Slower rise time requires
external power-on reset
circuit.
VVDDCORE DC supply core 0 2.5 V/µs Rise before or at the same
time as VDDIO
VVDDANA Analog supply voltage 0 2.5 V/µs Rise together with
VDDCORE
Table 35-4. Clock Frequencies
Symbol Parameter Description Min Max Units
fCPU CPU clock frequency 50
MHz
fPBA PBA clock frequency 50
fPBB PBB clock frequency 50
fGCLK0 GCLK0 clock frequency DFLLIF main reference, GCLK0 pin 50
fGCLK1 GCLK1 clock frequency DFLLIF dithering and SSG reference, GCLK1 pin 50
fGCLK2 GCLK2 clock frequency AST, GCLK2 pin 20
fGCLK3 GCLK3 clock frequency PWMA, GCLK3 pin 140
fGCLK4 GCLK4 clock frequency CAT, ACIFB, GCLK4 pin 50
fGCLK5 GCLK5 clock frequency GLOC and GCLK5 pin 80
fGCLK6 GCLK6 clock frequency ABDACB, IISC, and GCLK6 pin 50
fGCLK7 GCLK7 clock frequency USBC and GCLK7 pin 50
fGCLK8 GCLK8 clock frequency PLL0 source clock and GCLK8 pin 50
fGCLK9 GCLK9 clock frequency FREQM, GCLK0-8, GCLK9 pin 150
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– VVDDCORE = 1.62V, supplied by the internal regulator
– Corresponds to the 3.3V supply mode with 1.8V regulated I/O lines, please refer to
the Supply and Startup Considerations section for more details
• Equivalent to the 3.3V single supply mode
• Consumption in 1.8V single supply mode can be estimated by subtracting the regulator
static current
• Operating conditions, external core supply (Figure 35-2) - used only when noted
– VVDDIN = VVDDCORE = 1.8V
– Corresponds to the 1.8V single supply mode, please refer to the Supply and Startup
Considerations section for more details
• TA = 25C
• Oscillators
– OSC0 (crystal oscillator) stopped
– OSC32K (32KHz crystal oscillator) running with external 32KHz crystal
– DFLL running at 50MHz with OSC32K as reference
• Clocks
– DFLL used as main clock source
– CPU, HSB, and PBB clocks undivided
– PBA clock divided by 4
– The following peripheral clocks running
• PM, SCIF, AST, FLASHCDW, PBA bridge
– All other peripheral clocks stopped
• I/Os are inactive with internal pull-up
• Flash enabled in high speed mode
• POR18 enabled
• POR33 disabled
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Note: 1. These numbers are valid for the measured condition only and must not be extrapolated to other frequencies.
Figure 35-1. Measurement Schematic, Internal Core Supply
Table 35-5. Power Consumption for Different Operating Modes
Mode Conditions Measured on Consumption Typ Unit
Active(1) CPU running a recursive Fibonacci algorithm
Amp0
300
µA/MHz
CPU running a division algorithm 174
Idle(1) 96
Frozen(1) 57
Standby(1) 46
Stop 38
µA
DeepStop 25
Static
-OSC32K and AST stopped
-Internal core supply
14
-OSC32K running
-AST running at 1KHz
-External core supply (Figure 35-2)
7.3
-OSC32K and AST stopped
-External core supply (Figure 35-2) 6.7
Shutdown
-OSC32K running
-AST running at 1KHz 800
nA
AST and OSC32K stopped 220
Amp0 VDDIN
VDDCORE
VDDANA
VDDIO
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Figure 35-2. Measurement Schematic, External Core Supply
Amp0 VDDIN
VDDCORE
VDDANA
VDDIO
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35.5 I/O Pin Characteristics
Notes: 1. VVDD corresponds to either VVDDIN or VVDDIO, depending on the supply for the pin. Refer to Section on page 10 for details.
2. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
Table 35-6. Normal I/O Pin Characteristics(1)
Symbol Parameter Condition Min Typ Max Units
RPULLUP Pull-up resistance 75 100 145 kOhm
VIL Input low-level voltage
VVDD = 3.0V -0.3 0.3 * VVDD V
VVDD = 1.62V -0.3 0.3 * VVDD
VIH Input high-level voltage
VVDD = 3.6V 0.7 * VVDD VVDD + 0.3
V
VVDD = 1.98V 0.7 * VVDD VVDD + 0.3
VOL Output low-level voltage
VVDD = 3.0V, IOL = 3mA 0.4
V
VVDD = 1.62V, IOL = 2mA 0.4
VOH Output high-level voltage
VVDD = 3.0V, IOH = 3mA VVDD - 0.4
V
VVDD = 1.62V, IOH = 2mA VVDD - 0.4
fMAX Output frequency(2)
VVDD = 3.0V, load = 10pF 45
MHz
VVDD = 3.0V, load = 30pF 23
tRISE Rise time(2)
VVDD = 3.0V, load = 10pF 4.7
ns
VVDD = 3.0V, load = 30pF 11.5
tFALL Fall time(2)
VVDD = 3.0V, load = 10pF 4.8
VVDD = 3.0V, load = 30pF 12
ILEAK Input leakage current Pull-up resistors disabled 1 µA
CIN
Input capacitance, all
normal I/O pins except
PA05, PA07, PA17, PA20,
PA21, PB04, PB05
TQFP48 package 1.4
pF
QFN48 package 1.1
TLLGA48 package 1.1
TQFP64 package 1.5
QFN64 package 1.1
CIN Input capacitance, PA20
TQFP48 package 2.7
QFN48 package 2.4
TLLGA48 package 2.4
TQFP64 package 2.8
QFN64 package 2.4
CIN
Input capacitance, PA05,
PA07, PA17, PA21, PB04,
PB05
TQFP48 package 3.8
QFN48 package 3.5
TLLGA48 package 3.5
TQFP64 package 3.9
QFN64 package 3.5
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Notes: 1. VVDD corresponds to either VVDDIN or VVDDIO, depending on the supply for the pin. Refer to Section on page 10 for details.
Table 35-7. High-drive I/O Pin Characteristics(1)
Symbol Parameter Condition Min Typ Max Units
RPULLUP Pull-up resistance
PA06 30 50 110
PA02, PB01, RESET 75 100 145 kOhm
PA08, PA09 10 20 45
VIL Input low-level voltage
VVDD = 3.0V -0.3 0.3 * VVDD V
VVDD = 1.62V -0.3 0.3 * VVDD
VIH Input high-level voltage
VVDD = 3.6V 0.7 * VVDD VVDD + 0.3
V
VVDD = 1.98V 0.7 * VVDD VVDD + 0.3
VOL Output low-level voltage
VVDD = 3.0V, IOL = 6mA 0.4
V
VVDD = 1.62V, IOL = 4mA 0.4
VOH Output high-level voltage
VVDD = 3.0V, IOH = 6mA VVDD - 0.4
V
VVDD = 1.62V, IOH = 4mA VVDD - 0.4
fMAX
Output frequency, all High-drive I/O
pins, except PA08 and PA09(2)
VVDD = 3.0V, load = 10pF 45
MHz
VVDD = 3.0V, load = 30pF 23
tRISE
Rise time, all High-drive I/O pins, except
PA08 and PA09(2)
VVDD = 3.0V, load = 10pF 4.7
ns
VVDD = 3.0V, load = 30pF 11.5
tFALL
Fall time, all High-drive I/O pins, except
PA08 and PA09(2)
VVDD = 3.0V, load = 10pF 4.8
VVDD = 3.0V, load = 30pF 12
fMAX Output frequency, PA08 and PA09(2)
VVDD = 3.0V, load = 10pF 54
MHz
VVDD = 3.0V, load = 30pF 40
tRISE Rise time, PA08 and PA09(2)
VVDD = 3.0V, load = 10pF 2.8
ns
VVDD = 3.0V, load = 30pF 4.9
tFALL Fall time, PA08 and PA09(2)
VVDD = 3.0V, load = 10pF 2.4
VVDD = 3.0V, load = 30pF 4.6
ILEAK Input leakage current Pull-up resistors disabled 1 µA
CIN
Input capacitance, all High-drive I/O
pins, except PA08 and PA09
TQFP48 package 2.2
pF
QFN48 package 2.0
TLLGA48 package 2.0
TQFP64 package 2.3
QFN64 package 2.0
CIN Input capacitance, PA08 and PA09
TQFP48 package 7.0
QFN48 package 6.7
TLLGA48 package 6.7
TQFP64 package 7.1
QFN64 package 6.7
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2. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
Notes: 1. VVDD corresponds to either VVDDIN or VVDDIO, depending on the supply for the pin. Refer to Section on page 10 for details.
2. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
Table 35-8. High-drive I/O, 5V Tolerant, Pin Characteristics(1)
Symbol Parameter Condition Min Typ Max Units
RPULLUP Pull-up resistance 30 50 110 kOhm
VIL Input low-level voltage
VVDD = 3.0V -0.3 0.3 * VVDD V
VVDD = 1.62V -0.3 0.3 * VVDD
VIH Input high-level voltage
VVDD = 3.6V 0.7 * VVDD 5.5
V
VVDD = 1.98V 0.7 * VVDD 5.5
VOL Output low-level voltage
VVDD = 3.0V, IOL = 6mA 0.4
V
VVDD = 1.62V, IOL = 4mA 0.4
VOH Output high-level voltage
VVDD = 3.0V, IOH = 6mA VVDD - 0.4
V
VVDD = 1.62V, IOH = 4mA VVDD - 0.4
fMAX Output frequency(2)
VVDD = 3.0V, load = 10pF 87
MHz
VVDD = 3.0V, load = 30pF 58
tRISE Rise time(2)
VVDD = 3.0V, load = 10pF 2.3
ns
VVDD = 3.0V, load = 30pF 4.3
tFALL Fall time(2)
VVDD = 3.0V, load = 10pF 1.9
VVDD = 3.0V, load = 30pF 3.7
ILEAK Input leakage current 5.5V, pull-up resistors disabled 10 µA
CIN Input capacitance
TQFP48 package 4.5
pF
QFN48 package 4.2
TLLGA48 package 4.2
TQFP64 package 4.6
QFN64 package 4.2
Table 35-9. TWI Pin Characteristics(1)
Symbol Parameter Condition Min Typ Max Units
RPULLUP Pull-up resistance 25 35 60 kOhm
VIL Input low-level voltage
VVDD = 3.0V -0.3 0.3 * VVDD V
VVDD = 1.62V -0.3 0.3 * VVDD
VIH
Input high-level voltage
VVDD = 3.6V 0.7 * VVDD VVDD + 0.3
V
VVDD = 1.98V 0.7 * VVDD VVDD + 0.3
Input high-level voltage, 5V tolerant
SMBUS compliant pins
VVDD = 3.6V 0.7 * VVDD 5.5
V
VVDD = 1.98V 0.7 * VVDD 5.5
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Note: 1. VVDD corresponds to either VVDDIN or VVDDIO, depending on the supply for the pin. Refer to Section on page 10 for details.
35.6 Oscillator Characteristics
35.6.1 Oscillator 0 (OSC0) Characteristics
35.6.1.1 Digital Clock Characteristics
The following table describes the characteristics for the oscillator when a digital clock is applied
on XIN.
Note: 1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
35.6.1.2 Crystal Oscillator Characteristics
The following table describes the characteristics for the oscillator when a crystal is connected
between XIN and XOUT as shown in Figure 35-3. The user must choose a crystal oscillator
where the crystal load capacitance CL is within the range given in the table. The exact value of CL
VOL Output low-level voltage IOL = 3mA 0.4 V
ILEAK Input leakage current Pull-up resistors disabled 1
IIL Input low leakage 1 µA
IIH Input high leakage 1
CIN Input capacitance
TQFP48 package 3.8
pF
QFN48 package 3.5
TLLGA48 package 3.5
TQFP64 package 3.9
QFN64 package 3.5
tFALL Fall time
Cbus = 400pF, VVDD > 2.0V 250
ns
Cbus = 400pF, VVDD > 1.62V 470
fMAX Max frequency Cbus = 400pF, VVDD > 2.0V 400 kHz
Table 35-9. TWI Pin Characteristics(1)
Symbol Parameter Condition Min Typ Max Units
Table 35-10. Digital Clock Characteristics
Symbol Parameter Conditions Min Typ Max Units
fCPXIN XIN clock frequency 50 MHz
tCPXIN XIN clock duty cycle(1) 40 60 %
tSTARTUP Startup time 0 cycles
CIN XIN input capacitance
TQFP48 package 7.0
pF
QFN48 package 6.7
TLLGA48 package 6.7
TQFP64 package 7.1
QFN64 package 6.7
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can be found in the crystal datasheet. The capacitance of the external capacitors (CLEXT) can
then be computed as follows:
where CPCB is the capacitance of the PCB and Ci
is the internal equivalent load capacitance.
Notes: 1. Please refer to the SCIF chapter for details.
2. Nominal crystal cycles.
3. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
Figure 35-3. Oscillator Connection
CLEXT 2 CL Ci – CPCB = –
Table 35-11. Crystal Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
fOUT Crystal oscillator frequency(3) 0.45 10 16 MHz
CL Crystal load capacitance(3) 6 18
pF
Ci Internal equivalent load capacitance 2
tSTARTUP Startup time SCIF.OSCCTRL.GAIN = 2(1) 30 000(2) cycles
IOSC Current consumption
Active mode, f = 0.45MHz,
SCIF.OSCCTRL.GAIN = 0 30
µA Active mode, f = 10MHz,
SCIF.OSCCTRL.GAIN = 2 220
XIN
XOUT
CLEXT
CLEXT
CL
Ci
UC3L
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35.6.2 32KHz Crystal Oscillator (OSC32K) Characteristics
Figure 35-3 and the equation above also applies to the 32KHz oscillator connection. The user
must choose a crystal oscillator where the crystal load capacitance CL is within the range given
in the table. The exact value of CL can then be found in the crystal datasheet.
Notes: 1. Nominal crystal cycles.
2. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
35.6.3 Phase Locked Loop (PLL) Characteristics
Note: 1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
Table 35-12. 32 KHz Crystal Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
fOUT Crystal oscillator frequency 32 768 Hz
tSTARTUP Startup time RS = 60kOhm, CL = 9pF 30 000(1) cycles
CL Crystal load capacitance(2) 6 12.5
pF Ci
Internal equivalent load
capacitance 2
IOSC32 Current consumption 0.6 µA
RS Equivalent series resistance(2) 32 768Hz 35 85 kOhm
Table 35-13. Phase Locked Loop Characteristics
Symbol Parameter Conditions Min Typ Max Unit
fOUT Output frequency(1) 40 240
MHz
fIN Input frequency(1) 4 16
IPLL Current consumption 8 µA/MHz
tSTARTUP
Startup time, from enabling
the PLL until the PLL is
locked
fIN= 4MHz 200
µs
fIN= 16MHz 155
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35.6.4 Digital Frequency Locked Loop (DFLL) Characteristics
Notes: 1. Spread Spectrum Generator (SSG) is disabled by writing a zero to the EN bit in the DFLL0SSG register.
2. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
3. The FINE and COARSE values are selected by wrirting to the DFLL0VAL.FINE and DFLL0VAL.COARSE field respectively.
Table 35-14. Digital Frequency Locked Loop Characteristics
Symbol Parameter Conditions Min Typ Max Unit
fOUT Output frequency(2) 20 150 MHz
fREF Reference frequency(2) 8 150 kHz
FINE resolution step FINE > 100, all COARSE values (3) 0.38 %
Frequency drift over voltage
and temperature Open loop mode See Figure
35-4
Accuracy(2)
FINE lock, fREF = 32kHz, SSG disabled 0.1 0.5
%
ACCURATE lock, fREF = 32kHz, dither clk
RCSYS/2, SSG disabled 0.06 0.5
FINE lock, fREF = 8-150kHz, SSG
disabled 0.2 1
ACCURATE lock, fREF = 8-150kHz,
dither clk RCSYS/2, SSG disabled 0.1 1
IDFLL Power consumption 25 µA/MHz
tSTARTUP Startup time(2) Within 90% of final values 100 µs
tLOCK Lock time
fREF = 32kHz, FINE lock, SSG disabled 8
ms fREF = 32kHz, ACCURATE lock, dithering
clock = RCSYS/2, SSG disabled 28
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Figure 35-4. DFLL Open Loop Frequency Variation(1)(2)
Notes: 1. The plot shows a typical open loop mode behavior with COARSE= 99 and FINE= 255.
2. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
35.6.5 120MHz RC Oscillator (RC120M) Characteristics
Note: 1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
DFLL Open Loop Frequency variation
80
90
100
110
120
130
140
150
160
-40 -20 0 20 40 60 80
Temperature
Frequencies (MHz)
1,98V
1,8V
1.62V
Table 35-15. Internal 120MHz RC Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
fOUT Output frequency(1) 88 120 152 MHz
IRC120M Current consumption 1.2 mA
tSTARTUP Startup time(1) VVDDCORE = 1.8V 3 µs
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35.6.6 32kHz RC Oscillator (RC32K) Characteristics
Note: 1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
35.6.7 System RC Oscillator (RCSYS) Characteristics
35.7 Flash Characteristics
Table 35-18 gives the device maximum operating frequency depending on the number of flash
wait states and the flash read mode. The FSW bit in the FLASHCDW FSR register controls the
number of wait states used when accessing the flash memory.
Table 35-16. 32kHz RC Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
fOUT Output frequency(1) 20 32 44 kHz
IRC32K Current consumption 0.7 µA
tSTARTUP Startup time(1) 100 µs
Table 35-17. System RC Oscillator Characteristics
Symbol Parameter Conditions Min Typ Max Unit
fOUT Output frequency Calibrated at 85C 111.6 115 118.4 kHz
Table 35-18. Maximum Operating Frequency
Flash Wait States Read Mode Maximum Operating Frequency
1
High speed read mode
50MHz
0 25MHz
1
Normal read mode
30MHz
0 15MHz
Table 35-19. Flash Characteristics
Symbol Parameter Conditions Min Typ Max Unit
tFPP Page programming time
fCLK_HSB = 50MHz
5
ms
tFPE Page erase time 5
tFFP Fuse programming time 1
tFEA Full chip erase time (EA) 6
tFCE JTAG chip erase time (CHIP_ERASE) fCLK_HSB = 115kHz 310
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35.8 ABDACB Electrical Characteristics.
Notes: 1. Test Condition: Common Mode Offset Control disabled (CR.CMOC = 0). Alternative Upsampling Ratio disabled
(CR.ALTUPR = 0). Volume at maximum level (VCR0.VOLUME = 0x7FFF and VCR1.VOLUME = 0x7FFF). Device is battery
powered (9V) through an LDO, VDDIO at 3.3V. Analog low pass filter as shown in Figure 35-5(1. order differential low pass
filter followed by a 4. order low-pass), +VCC at +9V and -VCC at -9V. Test signal stored on a SD card and read by the SPI
Interface.
2. Performance numbers for dynamic range, SNR, and THD performance are very dependent on the application and circuit
board design. Since the design has 0dB Power Supply Rejection Ratio (PSRR), noise on the IO power supply will couple
directly through to the output and be present in the audio signal. To get the best performance one should reduce toggling of
other IO pins as much as possible and make sure the device has sufficient decoupling on the IO supply pins.
3. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
Figure 35-5. Differential Analog Low-pass Filter
Table 35-20. Flash Endurance and Data Retention
Symbol Parameter Conditions Min Typ Max Unit
NFARRAY Array endurance (write/page) 100k
cycles
NFFUSE General Purpose fuses endurance (write/bit) 10k
tRET Data retention 15 years
Table 35-21. ABDACB Electrical Characteristics
Symbol Parameter Conditions MIN TYP MAX Unit
Resolution 16 Bits
Dynamic range(1)(2)(3) FS = 48.000kHz > 76 dB
SNR(1)(2)(3) FS = 48.000kHz > 46 dB
THD(1)(2)(3) FS = 48.000kHz < 0.02 %
PSRR 0 dB
VOut maximum CR.CMOC = 0 97/128 * VDDIO V
VOut minimum CR.CMOC = 0 31/128 * VDDIO V
Common mode
CR.CMOC = 0
CR.CMOC = 1, DAC_0 and DAC_1 pins
CR.CMOC = 1, DACN_0 and DACN_1 pins
64/128 * VDDIO
80/128 * VDDIO
48/128 * VDDIO
V
R1, 22K
C2
140p
R2, 22K
R4, 22K
C1, 140p
R3, 22K
R6, 22K
R5, 22K
R7, 22K
C4
270p
C3
310p
-Vcc
+Vcc
-Vcc
+Vcc
DAC
DACN
R8, 22K R9, 22K
C6
110p
C5
750p
-Vcc
+Vcc
GND GND GND GND GND
Out
912
32142D–06/2013
ATUC64/128/256L3/4U
35.9 Analog Characteristics
35.9.1 Voltage Regulator Characteristics
Note: 1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same process
technology. These values are not covered by test limits in production.
Note: 1. Refer to Section 6.1.2 on page 39.
Table 35-22. VREG Electrical Characteristics
Symbol Parameter Condition Min Typ Max Units
VVDDIN Input voltage range 1.98 3.3 3.6
V
VVDDCORE Output voltage, calibrated value VVDDIN >= 1.98V 1.8
Output voltage accuracy(1)
IOUT = 0.1mA to 60mA,
VVDDIN > 1.98V
2
%
IOUT = 0.1mA to 60mA,
VVDDIN <1.98V
4
IOUT DC output current(1)
Normal mode 60
mA
Low power mode 1
IVREG Static current of internal regulator
Normal mode 13
µA
Low power mode 4
Table 35-23. Decoupling Requirements
Symbol Parameter Condition Typ Techno. Units
CIN1 Input regulator capacitor 1 33
nF
CIN2 Input regulator capacitor 2 100
CIN3 Input regulator capacitor 3 10 µF
COUT1 Output regulator capacitor 1 100 nF
COUT2 Output regulator capacitor 2 2.2 Tantalum
0.5
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